1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 1990 Mentat Inc.
25 * Copyright (c) 2012 Joyent, Inc. All rights reserved.
26 * Copyright (c) 2014, OmniTI Computer Consulting, Inc. All rights reserved.
27 */
28
29 #include <sys/types.h>
30 #include <sys/stream.h>
31 #include <sys/dlpi.h>
32 #include <sys/stropts.h>
33 #include <sys/sysmacros.h>
34 #include <sys/strsubr.h>
35 #include <sys/strlog.h>
36 #include <sys/strsun.h>
37 #include <sys/zone.h>
38 #define _SUN_TPI_VERSION 2
39 #include <sys/tihdr.h>
40 #include <sys/xti_inet.h>
41 #include <sys/ddi.h>
42 #include <sys/suntpi.h>
43 #include <sys/cmn_err.h>
44 #include <sys/debug.h>
45 #include <sys/kobj.h>
46 #include <sys/modctl.h>
47 #include <sys/atomic.h>
48 #include <sys/policy.h>
49 #include <sys/priv.h>
50 #include <sys/taskq.h>
51
52 #include <sys/systm.h>
53 #include <sys/param.h>
54 #include <sys/kmem.h>
55 #include <sys/sdt.h>
56 #include <sys/socket.h>
57 #include <sys/vtrace.h>
58 #include <sys/isa_defs.h>
59 #include <sys/mac.h>
60 #include <net/if.h>
61 #include <net/if_arp.h>
62 #include <net/route.h>
63 #include <sys/sockio.h>
64 #include <netinet/in.h>
65 #include <net/if_dl.h>
66
67 #include <inet/common.h>
68 #include <inet/mi.h>
69 #include <inet/mib2.h>
70 #include <inet/nd.h>
71 #include <inet/arp.h>
72 #include <inet/snmpcom.h>
73 #include <inet/optcom.h>
74 #include <inet/kstatcom.h>
75
76 #include <netinet/igmp_var.h>
77 #include <netinet/ip6.h>
78 #include <netinet/icmp6.h>
79 #include <netinet/sctp.h>
80
81 #include <inet/ip.h>
82 #include <inet/ip_impl.h>
83 #include <inet/ip6.h>
84 #include <inet/ip6_asp.h>
85 #include <inet/tcp.h>
86 #include <inet/tcp_impl.h>
87 #include <inet/ip_multi.h>
88 #include <inet/ip_if.h>
89 #include <inet/ip_ire.h>
90 #include <inet/ip_ftable.h>
91 #include <inet/ip_rts.h>
92 #include <inet/ip_ndp.h>
93 #include <inet/ip_listutils.h>
94 #include <netinet/igmp.h>
95 #include <netinet/ip_mroute.h>
96 #include <inet/ipp_common.h>
97
98 #include <net/pfkeyv2.h>
99 #include <inet/sadb.h>
100 #include <inet/ipsec_impl.h>
101 #include <inet/iptun/iptun_impl.h>
102 #include <inet/ipdrop.h>
103 #include <inet/ip_netinfo.h>
104 #include <inet/ilb_ip.h>
105
106 #include <sys/ethernet.h>
107 #include <net/if_types.h>
108 #include <sys/cpuvar.h>
109
110 #include <ipp/ipp.h>
111 #include <ipp/ipp_impl.h>
112 #include <ipp/ipgpc/ipgpc.h>
113
114 #include <sys/pattr.h>
115 #include <inet/ipclassifier.h>
116 #include <inet/sctp_ip.h>
117 #include <inet/sctp/sctp_impl.h>
118 #include <inet/udp_impl.h>
119 #include <inet/rawip_impl.h>
120 #include <inet/rts_impl.h>
121
122 #include <sys/tsol/label.h>
123 #include <sys/tsol/tnet.h>
124
125 #include <sys/squeue_impl.h>
126 #include <inet/ip_arp.h>
127
128 #include <sys/clock_impl.h> /* For LBOLT_FASTPATH{,64} */
129
130 /*
131 * Values for squeue switch:
132 * IP_SQUEUE_ENTER_NODRAIN: SQ_NODRAIN
133 * IP_SQUEUE_ENTER: SQ_PROCESS
134 * IP_SQUEUE_FILL: SQ_FILL
135 */
136 int ip_squeue_enter = IP_SQUEUE_ENTER; /* Setable in /etc/system */
137
138 int ip_squeue_flag;
139
140 /*
141 * Setable in /etc/system
142 */
143 int ip_poll_normal_ms = 100;
144 int ip_poll_normal_ticks = 0;
145 int ip_modclose_ackwait_ms = 3000;
146
147 /*
148 * It would be nice to have these present only in DEBUG systems, but the
149 * current design of the global symbol checking logic requires them to be
150 * unconditionally present.
151 */
152 uint_t ip_thread_data; /* TSD key for debug support */
153 krwlock_t ip_thread_rwlock;
154 list_t ip_thread_list;
155
156 /*
157 * Structure to represent a linked list of msgblks. Used by ip_snmp_ functions.
158 */
159
160 struct listptr_s {
161 mblk_t *lp_head; /* pointer to the head of the list */
162 mblk_t *lp_tail; /* pointer to the tail of the list */
163 };
164
165 typedef struct listptr_s listptr_t;
166
167 /*
168 * This is used by ip_snmp_get_mib2_ip_route_media and
169 * ip_snmp_get_mib2_ip6_route_media to carry the lists of return data.
170 */
171 typedef struct iproutedata_s {
172 uint_t ird_idx;
173 uint_t ird_flags; /* see below */
174 listptr_t ird_route; /* ipRouteEntryTable */
175 listptr_t ird_netmedia; /* ipNetToMediaEntryTable */
176 listptr_t ird_attrs; /* ipRouteAttributeTable */
177 } iproutedata_t;
178
179 /* Include ire_testhidden and IRE_IF_CLONE routes */
180 #define IRD_REPORT_ALL 0x01
181
182 /*
183 * Cluster specific hooks. These should be NULL when booted as a non-cluster
184 */
185
186 /*
187 * Hook functions to enable cluster networking
188 * On non-clustered systems these vectors must always be NULL.
189 *
190 * Hook function to Check ip specified ip address is a shared ip address
191 * in the cluster
192 *
193 */
194 int (*cl_inet_isclusterwide)(netstackid_t stack_id, uint8_t protocol,
195 sa_family_t addr_family, uint8_t *laddrp, void *args) = NULL;
196
197 /*
198 * Hook function to generate cluster wide ip fragment identifier
199 */
200 uint32_t (*cl_inet_ipident)(netstackid_t stack_id, uint8_t protocol,
201 sa_family_t addr_family, uint8_t *laddrp, uint8_t *faddrp,
202 void *args) = NULL;
203
204 /*
205 * Hook function to generate cluster wide SPI.
206 */
207 void (*cl_inet_getspi)(netstackid_t, uint8_t, uint8_t *, size_t,
208 void *) = NULL;
209
210 /*
211 * Hook function to verify if the SPI is already utlized.
212 */
213
214 int (*cl_inet_checkspi)(netstackid_t, uint8_t, uint32_t, void *) = NULL;
215
216 /*
217 * Hook function to delete the SPI from the cluster wide repository.
218 */
219
220 void (*cl_inet_deletespi)(netstackid_t, uint8_t, uint32_t, void *) = NULL;
221
222 /*
223 * Hook function to inform the cluster when packet received on an IDLE SA
224 */
225
226 void (*cl_inet_idlesa)(netstackid_t, uint8_t, uint32_t, sa_family_t,
227 in6_addr_t, in6_addr_t, void *) = NULL;
228
229 /*
230 * Synchronization notes:
231 *
232 * IP is a fully D_MP STREAMS module/driver. Thus it does not depend on any
233 * MT level protection given by STREAMS. IP uses a combination of its own
234 * internal serialization mechanism and standard Solaris locking techniques.
235 * The internal serialization is per phyint. This is used to serialize
236 * plumbing operations, IPMP operations, most set ioctls, etc.
237 *
238 * Plumbing is a long sequence of operations involving message
239 * exchanges between IP, ARP and device drivers. Many set ioctls are typically
240 * involved in plumbing operations. A natural model is to serialize these
241 * ioctls one per ill. For example plumbing of hme0 and qfe0 can go on in
242 * parallel without any interference. But various set ioctls on hme0 are best
243 * serialized, along with IPMP operations and processing of DLPI control
244 * messages received from drivers on a per phyint basis. This serialization is
245 * provided by the ipsq_t and primitives operating on this. Details can
246 * be found in ip_if.c above the core primitives operating on ipsq_t.
247 *
248 * Lookups of an ipif or ill by a thread return a refheld ipif / ill.
249 * Simiarly lookup of an ire by a thread also returns a refheld ire.
250 * In addition ipif's and ill's referenced by the ire are also indirectly
251 * refheld. Thus no ipif or ill can vanish as long as an ipif is refheld
252 * directly or indirectly. For example an SIOCSLIFADDR ioctl that changes the
253 * address of an ipif has to go through the ipsq_t. This ensures that only
254 * one such exclusive operation proceeds at any time on the ipif. It then
255 * waits for all refcnts
256 * associated with this ipif to come down to zero. The address is changed
257 * only after the ipif has been quiesced. Then the ipif is brought up again.
258 * More details are described above the comment in ip_sioctl_flags.
259 *
260 * Packet processing is based mostly on IREs and are fully multi-threaded
261 * using standard Solaris MT techniques.
262 *
263 * There are explicit locks in IP to handle:
264 * - The ip_g_head list maintained by mi_open_link() and friends.
265 *
266 * - The reassembly data structures (one lock per hash bucket)
267 *
268 * - conn_lock is meant to protect conn_t fields. The fields actually
269 * protected by conn_lock are documented in the conn_t definition.
270 *
271 * - ire_lock to protect some of the fields of the ire, IRE tables
272 * (one lock per hash bucket). Refer to ip_ire.c for details.
273 *
274 * - ndp_g_lock and ncec_lock for protecting NCEs.
275 *
276 * - ill_lock protects fields of the ill and ipif. Details in ip.h
277 *
278 * - ill_g_lock: This is a global reader/writer lock. Protects the following
279 * * The AVL tree based global multi list of all ills.
280 * * The linked list of all ipifs of an ill
281 * * The <ipsq-xop> mapping
282 * * <ill-phyint> association
283 * Insertion/deletion of an ill in the system, insertion/deletion of an ipif
284 * into an ill, changing the <ipsq-xop> mapping of an ill, changing the
285 * <ill-phyint> assoc of an ill will all have to hold the ill_g_lock as
286 * writer for the actual duration of the insertion/deletion/change.
287 *
288 * - ill_lock: This is a per ill mutex.
289 * It protects some members of the ill_t struct; see ip.h for details.
290 * It also protects the <ill-phyint> assoc.
291 * It also protects the list of ipifs hanging off the ill.
292 *
293 * - ipsq_lock: This is a per ipsq_t mutex lock.
294 * This protects some members of the ipsq_t struct; see ip.h for details.
295 * It also protects the <ipsq-ipxop> mapping
296 *
297 * - ipx_lock: This is a per ipxop_t mutex lock.
298 * This protects some members of the ipxop_t struct; see ip.h for details.
299 *
300 * - phyint_lock: This is a per phyint mutex lock. Protects just the
301 * phyint_flags
302 *
303 * - ip_addr_avail_lock: This is used to ensure the uniqueness of IP addresses.
304 * This lock is held in ipif_up_done and the ipif is marked IPIF_UP and the
305 * uniqueness check also done atomically.
306 *
307 * - ill_g_usesrc_lock: This readers/writer lock protects the usesrc
308 * group list linked by ill_usesrc_grp_next. It also protects the
309 * ill_usesrc_ifindex field. It is taken as a writer when a member of the
310 * group is being added or deleted. This lock is taken as a reader when
311 * walking the list/group(eg: to get the number of members in a usesrc group).
312 * Note, it is only necessary to take this lock if the ill_usesrc_grp_next
313 * field is changing state i.e from NULL to non-NULL or vice-versa. For
314 * example, it is not necessary to take this lock in the initial portion
315 * of ip_sioctl_slifusesrc or at all in ip_sioctl_flags since these
316 * operations are executed exclusively and that ensures that the "usesrc
317 * group state" cannot change. The "usesrc group state" change can happen
318 * only in the latter part of ip_sioctl_slifusesrc and in ill_delete.
319 *
320 * Changing <ill-phyint>, <ipsq-xop> assocications:
321 *
322 * To change the <ill-phyint> association, the ill_g_lock must be held
323 * as writer, and the ill_locks of both the v4 and v6 instance of the ill
324 * must be held.
325 *
326 * To change the <ipsq-xop> association, the ill_g_lock must be held as
327 * writer, the ipsq_lock must be held, and one must be writer on the ipsq.
328 * This is only done when ills are added or removed from IPMP groups.
329 *
330 * To add or delete an ipif from the list of ipifs hanging off the ill,
331 * ill_g_lock (writer) and ill_lock must be held and the thread must be
332 * a writer on the associated ipsq.
333 *
334 * To add or delete an ill to the system, the ill_g_lock must be held as
335 * writer and the thread must be a writer on the associated ipsq.
336 *
337 * To add or delete an ilm to an ill, the ill_lock must be held and the thread
338 * must be a writer on the associated ipsq.
339 *
340 * Lock hierarchy
341 *
342 * Some lock hierarchy scenarios are listed below.
343 *
344 * ill_g_lock -> conn_lock -> ill_lock -> ipsq_lock -> ipx_lock
345 * ill_g_lock -> ill_lock(s) -> phyint_lock
346 * ill_g_lock -> ndp_g_lock -> ill_lock -> ncec_lock
347 * ill_g_lock -> ip_addr_avail_lock
348 * conn_lock -> irb_lock -> ill_lock -> ire_lock
349 * ill_g_lock -> ip_g_nd_lock
350 * ill_g_lock -> ips_ipmp_lock -> ill_lock -> nce_lock
351 * ill_g_lock -> ndp_g_lock -> ill_lock -> ncec_lock -> nce_lock
352 * arl_lock -> ill_lock
353 * ips_ire_dep_lock -> irb_lock
354 *
355 * When more than 1 ill lock is needed to be held, all ill lock addresses
356 * are sorted on address and locked starting from highest addressed lock
357 * downward.
358 *
359 * Multicast scenarios
360 * ips_ill_g_lock -> ill_mcast_lock
361 * conn_ilg_lock -> ips_ill_g_lock -> ill_lock
362 * ill_mcast_serializer -> ill_mcast_lock -> ips_ipmp_lock -> ill_lock
363 * ill_mcast_serializer -> ill_mcast_lock -> connf_lock -> conn_lock
364 * ill_mcast_serializer -> ill_mcast_lock -> conn_ilg_lock
365 * ill_mcast_serializer -> ill_mcast_lock -> ips_igmp_timer_lock
366 *
367 * IPsec scenarios
368 *
369 * ipsa_lock -> ill_g_lock -> ill_lock
370 * ill_g_usesrc_lock -> ill_g_lock -> ill_lock
371 *
372 * Trusted Solaris scenarios
373 *
374 * igsa_lock -> gcgrp_rwlock -> gcgrp_lock
375 * igsa_lock -> gcdb_lock
376 * gcgrp_rwlock -> ire_lock
377 * gcgrp_rwlock -> gcdb_lock
378 *
379 * squeue(sq_lock), flow related (ft_lock, fe_lock) locking
380 *
381 * cpu_lock --> ill_lock --> sqset_lock --> sq_lock
382 * sq_lock -> conn_lock -> QLOCK(q)
383 * ill_lock -> ft_lock -> fe_lock
384 *
385 * Routing/forwarding table locking notes:
386 *
387 * Lock acquisition order: Radix tree lock, irb_lock.
388 * Requirements:
389 * i. Walker must not hold any locks during the walker callback.
390 * ii Walker must not see a truncated tree during the walk because of any node
391 * deletion.
392 * iii Existing code assumes ire_bucket is valid if it is non-null and is used
393 * in many places in the code to walk the irb list. Thus even if all the
394 * ires in a bucket have been deleted, we still can't free the radix node
395 * until the ires have actually been inactive'd (freed).
396 *
397 * Tree traversal - Need to hold the global tree lock in read mode.
398 * Before dropping the global tree lock, need to either increment the ire_refcnt
399 * to ensure that the radix node can't be deleted.
400 *
401 * Tree add - Need to hold the global tree lock in write mode to add a
402 * radix node. To prevent the node from being deleted, increment the
403 * irb_refcnt, after the node is added to the tree. The ire itself is
404 * added later while holding the irb_lock, but not the tree lock.
405 *
406 * Tree delete - Need to hold the global tree lock and irb_lock in write mode.
407 * All associated ires must be inactive (i.e. freed), and irb_refcnt
408 * must be zero.
409 *
410 * Walker - Increment irb_refcnt before calling the walker callback. Hold the
411 * global tree lock (read mode) for traversal.
412 *
413 * IRE dependencies - In some cases we hold ips_ire_dep_lock across ire_refrele
414 * hence we will acquire irb_lock while holding ips_ire_dep_lock.
415 *
416 * IPsec notes :
417 *
418 * IP interacts with the IPsec code (AH/ESP) by storing IPsec attributes
419 * in the ip_xmit_attr_t ip_recv_attr_t. For outbound datagrams, the
420 * ip_xmit_attr_t has the
421 * information used by the IPsec code for applying the right level of
422 * protection. The information initialized by IP in the ip_xmit_attr_t
423 * is determined by the per-socket policy or global policy in the system.
424 * For inbound datagrams, the ip_recv_attr_t
425 * starts out with nothing in it. It gets filled
426 * with the right information if it goes through the AH/ESP code, which
427 * happens if the incoming packet is secure. The information initialized
428 * by AH/ESP, is later used by IP (during fanouts to ULP) to see whether
429 * the policy requirements needed by per-socket policy or global policy
430 * is met or not.
431 *
432 * For fully connected sockets i.e dst, src [addr, port] is known,
433 * conn_policy_cached is set indicating that policy has been cached.
434 * conn_in_enforce_policy may or may not be set depending on whether
435 * there is a global policy match or per-socket policy match.
436 * Policy inheriting happpens in ip_policy_set once the destination is known.
437 * Once the right policy is set on the conn_t, policy cannot change for
438 * this socket. This makes life simpler for TCP (UDP ?) where
439 * re-transmissions go out with the same policy. For symmetry, policy
440 * is cached for fully connected UDP sockets also. Thus if policy is cached,
441 * it also implies that policy is latched i.e policy cannot change
442 * on these sockets. As we have the right policy on the conn, we don't
443 * have to lookup global policy for every outbound and inbound datagram
444 * and thus serving as an optimization. Note that a global policy change
445 * does not affect fully connected sockets if they have policy. If fully
446 * connected sockets did not have any policy associated with it, global
447 * policy change may affect them.
448 *
449 * IP Flow control notes:
450 * ---------------------
451 * Non-TCP streams are flow controlled by IP. The way this is accomplished
452 * differs when ILL_CAPAB_DLD_DIRECT is enabled for that IP instance. When
453 * ILL_DIRECT_CAPABLE(ill) is TRUE, IP can do direct function calls into
454 * GLDv3. Otherwise packets are sent down to lower layers using STREAMS
455 * functions.
456 *
457 * Per Tx ring udp flow control:
458 * This is applicable only when ILL_CAPAB_DLD_DIRECT capability is set in
459 * the ill (i.e. ILL_DIRECT_CAPABLE(ill) is true).
460 *
461 * The underlying link can expose multiple Tx rings to the GLDv3 mac layer.
462 * To achieve best performance, outgoing traffic need to be fanned out among
463 * these Tx ring. mac_tx() is called (via str_mdata_fastpath_put()) to send
464 * traffic out of the NIC and it takes a fanout hint. UDP connections pass
465 * the address of connp as fanout hint to mac_tx(). Under flow controlled
466 * condition, mac_tx() returns a non-NULL cookie (ip_mac_tx_cookie_t). This
467 * cookie points to a specific Tx ring that is blocked. The cookie is used to
468 * hash into an idl_tx_list[] entry in idl_tx_list[] array. Each idl_tx_list_t
469 * point to drain_lists (idl_t's). These drain list will store the blocked UDP
470 * connp's. The drain list is not a single list but a configurable number of
471 * lists.
472 *
473 * The diagram below shows idl_tx_list_t's and their drain_lists. ip_stack_t
474 * has an array of idl_tx_list_t. The size of the array is TX_FANOUT_SIZE
475 * which is equal to 128. This array in turn contains a pointer to idl_t[],
476 * the ip drain list. The idl_t[] array size is MIN(max_ncpus, 8). The drain
477 * list will point to the list of connp's that are flow controlled.
478 *
479 * --------------- ------- ------- -------
480 * |->|drain_list[0]|-->|connp|-->|connp|-->|connp|-->
481 * | --------------- ------- ------- -------
482 * | --------------- ------- ------- -------
483 * |->|drain_list[1]|-->|connp|-->|connp|-->|connp|-->
484 * ---------------- | --------------- ------- ------- -------
485 * |idl_tx_list[0]|->| --------------- ------- ------- -------
486 * ---------------- |->|drain_list[2]|-->|connp|-->|connp|-->|connp|-->
487 * | --------------- ------- ------- -------
488 * . . . . .
489 * | --------------- ------- ------- -------
490 * |->|drain_list[n]|-->|connp|-->|connp|-->|connp|-->
491 * --------------- ------- ------- -------
492 * --------------- ------- ------- -------
493 * |->|drain_list[0]|-->|connp|-->|connp|-->|connp|-->
494 * | --------------- ------- ------- -------
495 * | --------------- ------- ------- -------
496 * ---------------- |->|drain_list[1]|-->|connp|-->|connp|-->|connp|-->
497 * |idl_tx_list[1]|->| --------------- ------- ------- -------
498 * ---------------- | . . . .
499 * | --------------- ------- ------- -------
500 * |->|drain_list[n]|-->|connp|-->|connp|-->|connp|-->
501 * --------------- ------- ------- -------
502 * .....
503 * ----------------
504 * |idl_tx_list[n]|-> ...
505 * ----------------
506 *
507 * When mac_tx() returns a cookie, the cookie is hashed into an index into
508 * ips_idl_tx_list[], and conn_drain_insert() is called with the idl_tx_list
509 * to insert the conn onto. conn_drain_insert() asserts flow control for the
510 * sockets via su_txq_full() (non-STREAMS) or QFULL on conn_wq (STREAMS).
511 * Further, conn_blocked is set to indicate that the conn is blocked.
512 *
513 * GLDv3 calls ill_flow_enable() when flow control is relieved. The cookie
514 * passed in the call to ill_flow_enable() identifies the blocked Tx ring and
515 * is again hashed to locate the appropriate idl_tx_list, which is then
516 * drained via conn_walk_drain(). conn_walk_drain() goes through each conn in
517 * the drain list and calls conn_drain_remove() to clear flow control (via
518 * calling su_txq_full() or clearing QFULL), and remove the conn from the
519 * drain list.
520 *
521 * Note that the drain list is not a single list but a (configurable) array of
522 * lists (8 elements by default). Synchronization between drain insertion and
523 * flow control wakeup is handled by using idl_txl->txl_lock, and only
524 * conn_drain_insert() and conn_drain_remove() manipulate the drain list.
525 *
526 * Flow control via STREAMS is used when ILL_DIRECT_CAPABLE() returns FALSE.
527 * On the send side, if the packet cannot be sent down to the driver by IP
528 * (canput() fails), ip_xmit() drops the packet and returns EWOULDBLOCK to the
529 * caller, who may then invoke ixa_check_drain_insert() to insert the conn on
530 * the 0'th drain list. When ip_wsrv() runs on the ill_wq because flow
531 * control has been relieved, the blocked conns in the 0'th drain list are
532 * drained as in the non-STREAMS case.
533 *
534 * In both the STREAMS and non-STREAMS cases, the sockfs upcall to set QFULL
535 * is done when the conn is inserted into the drain list (conn_drain_insert())
536 * and cleared when the conn is removed from the it (conn_drain_remove()).
537 *
538 * IPQOS notes:
539 *
540 * IPQoS Policies are applied to packets using IPPF (IP Policy framework)
541 * and IPQoS modules. IPPF includes hooks in IP at different control points
542 * (callout positions) which direct packets to IPQoS modules for policy
543 * processing. Policies, if present, are global.
544 *
545 * The callout positions are located in the following paths:
546 * o local_in (packets destined for this host)
547 * o local_out (packets orginating from this host )
548 * o fwd_in (packets forwarded by this m/c - inbound)
549 * o fwd_out (packets forwarded by this m/c - outbound)
550 * Hooks at these callout points can be enabled/disabled using the ndd variable
551 * ip_policy_mask (a bit mask with the 4 LSB indicating the callout positions).
552 * By default all the callout positions are enabled.
553 *
554 * Outbound (local_out)
555 * Hooks are placed in ire_send_wire_v4 and ire_send_wire_v6.
556 *
557 * Inbound (local_in)
558 * Hooks are placed in ip_fanout_v4 and ip_fanout_v6.
559 *
560 * Forwarding (in and out)
561 * Hooks are placed in ire_recv_forward_v4/v6.
562 *
563 * IP Policy Framework processing (IPPF processing)
564 * Policy processing for a packet is initiated by ip_process, which ascertains
565 * that the classifier (ipgpc) is loaded and configured, failing which the
566 * packet resumes normal processing in IP. If the clasifier is present, the
567 * packet is acted upon by one or more IPQoS modules (action instances), per
568 * filters configured in ipgpc and resumes normal IP processing thereafter.
569 * An action instance can drop a packet in course of its processing.
570 *
571 * Zones notes:
572 *
573 * The partitioning rules for networking are as follows:
574 * 1) Packets coming from a zone must have a source address belonging to that
575 * zone.
576 * 2) Packets coming from a zone can only be sent on a physical interface on
577 * which the zone has an IP address.
578 * 3) Between two zones on the same machine, packet delivery is only allowed if
579 * there's a matching route for the destination and zone in the forwarding
580 * table.
581 * 4) The TCP and UDP port spaces are per-zone; that is, two processes in
582 * different zones can bind to the same port with the wildcard address
583 * (INADDR_ANY).
584 *
585 * The granularity of interface partitioning is at the logical interface level.
586 * Therefore, every zone has its own IP addresses, and incoming packets can be
587 * attributed to a zone unambiguously. A logical interface is placed into a zone
588 * using the SIOCSLIFZONE ioctl; this sets the ipif_zoneid field in the ipif_t
589 * structure. Rule (1) is implemented by modifying the source address selection
590 * algorithm so that the list of eligible addresses is filtered based on the
591 * sending process zone.
592 *
593 * The Internet Routing Entries (IREs) are either exclusive to a zone or shared
594 * across all zones, depending on their type. Here is the break-up:
595 *
596 * IRE type Shared/exclusive
597 * -------- ----------------
598 * IRE_BROADCAST Exclusive
599 * IRE_DEFAULT (default routes) Shared (*)
600 * IRE_LOCAL Exclusive (x)
601 * IRE_LOOPBACK Exclusive
602 * IRE_PREFIX (net routes) Shared (*)
603 * IRE_IF_NORESOLVER (interface routes) Exclusive
604 * IRE_IF_RESOLVER (interface routes) Exclusive
605 * IRE_IF_CLONE (interface routes) Exclusive
606 * IRE_HOST (host routes) Shared (*)
607 *
608 * (*) A zone can only use a default or off-subnet route if the gateway is
609 * directly reachable from the zone, that is, if the gateway's address matches
610 * one of the zone's logical interfaces.
611 *
612 * (x) IRE_LOCAL are handled a bit differently.
613 * When ip_restrict_interzone_loopback is set (the default),
614 * ire_route_recursive restricts loopback using an IRE_LOCAL
615 * between zone to the case when L2 would have conceptually looped the packet
616 * back, i.e. the loopback which is required since neither Ethernet drivers
617 * nor Ethernet hardware loops them back. This is the case when the normal
618 * routes (ignoring IREs with different zoneids) would send out the packet on
619 * the same ill as the ill with which is IRE_LOCAL is associated.
620 *
621 * Multiple zones can share a common broadcast address; typically all zones
622 * share the 255.255.255.255 address. Incoming as well as locally originated
623 * broadcast packets must be dispatched to all the zones on the broadcast
624 * network. For directed broadcasts (e.g. 10.16.72.255) this is not trivial
625 * since some zones may not be on the 10.16.72/24 network. To handle this, each
626 * zone has its own set of IRE_BROADCAST entries; then, broadcast packets are
627 * sent to every zone that has an IRE_BROADCAST entry for the destination
628 * address on the input ill, see ip_input_broadcast().
629 *
630 * Applications in different zones can join the same multicast group address.
631 * The same logic applies for multicast as for broadcast. ip_input_multicast
632 * dispatches packets to all zones that have members on the physical interface.
633 */
634
635 /*
636 * Squeue Fanout flags:
637 * 0: No fanout.
638 * 1: Fanout across all squeues
639 */
640 boolean_t ip_squeue_fanout = 0;
641
642 /*
643 * Maximum dups allowed per packet.
644 */
645 uint_t ip_max_frag_dups = 10;
646
647 static int ip_open(queue_t *q, dev_t *devp, int flag, int sflag,
648 cred_t *credp, boolean_t isv6);
649 static mblk_t *ip_xmit_attach_llhdr(mblk_t *, nce_t *);
650
651 static boolean_t icmp_inbound_verify_v4(mblk_t *, icmph_t *, ip_recv_attr_t *);
652 static void icmp_inbound_too_big_v4(icmph_t *, ip_recv_attr_t *);
653 static void icmp_inbound_error_fanout_v4(mblk_t *, icmph_t *,
654 ip_recv_attr_t *);
655 static void icmp_options_update(ipha_t *);
656 static void icmp_param_problem(mblk_t *, uint8_t, ip_recv_attr_t *);
657 static void icmp_pkt(mblk_t *, void *, size_t, ip_recv_attr_t *);
658 static mblk_t *icmp_pkt_err_ok(mblk_t *, ip_recv_attr_t *);
659 static void icmp_redirect_v4(mblk_t *mp, ipha_t *, icmph_t *,
660 ip_recv_attr_t *);
661 static void icmp_send_redirect(mblk_t *, ipaddr_t, ip_recv_attr_t *);
662 static void icmp_send_reply_v4(mblk_t *, ipha_t *, icmph_t *,
663 ip_recv_attr_t *);
664
665 mblk_t *ip_dlpi_alloc(size_t, t_uscalar_t);
666 char *ip_dot_addr(ipaddr_t, char *);
667 mblk_t *ip_carve_mp(mblk_t **, ssize_t);
668 int ip_close(queue_t *, int);
669 static char *ip_dot_saddr(uchar_t *, char *);
670 static void ip_lrput(queue_t *, mblk_t *);
671 ipaddr_t ip_net_mask(ipaddr_t);
672 char *ip_nv_lookup(nv_t *, int);
673 void ip_rput(queue_t *, mblk_t *);
674 static void ip_rput_dlpi_writer(ipsq_t *dummy_sq, queue_t *q, mblk_t *mp,
675 void *dummy_arg);
676 int ip_snmp_get(queue_t *, mblk_t *, int, boolean_t);
677 static mblk_t *ip_snmp_get_mib2_ip(queue_t *, mblk_t *,
678 mib2_ipIfStatsEntry_t *, ip_stack_t *, boolean_t);
679 static mblk_t *ip_snmp_get_mib2_ip_traffic_stats(queue_t *, mblk_t *,
680 ip_stack_t *, boolean_t);
681 static mblk_t *ip_snmp_get_mib2_ip6(queue_t *, mblk_t *, ip_stack_t *,
682 boolean_t);
683 static mblk_t *ip_snmp_get_mib2_icmp(queue_t *, mblk_t *, ip_stack_t *ipst);
684 static mblk_t *ip_snmp_get_mib2_icmp6(queue_t *, mblk_t *, ip_stack_t *ipst);
685 static mblk_t *ip_snmp_get_mib2_igmp(queue_t *, mblk_t *, ip_stack_t *ipst);
686 static mblk_t *ip_snmp_get_mib2_multi(queue_t *, mblk_t *, ip_stack_t *ipst);
687 static mblk_t *ip_snmp_get_mib2_ip_addr(queue_t *, mblk_t *,
688 ip_stack_t *ipst, boolean_t);
689 static mblk_t *ip_snmp_get_mib2_ip6_addr(queue_t *, mblk_t *,
690 ip_stack_t *ipst, boolean_t);
691 static mblk_t *ip_snmp_get_mib2_ip_group_src(queue_t *, mblk_t *,
692 ip_stack_t *ipst);
693 static mblk_t *ip_snmp_get_mib2_ip6_group_src(queue_t *, mblk_t *,
694 ip_stack_t *ipst);
695 static mblk_t *ip_snmp_get_mib2_ip_group_mem(queue_t *, mblk_t *,
696 ip_stack_t *ipst);
697 static mblk_t *ip_snmp_get_mib2_ip6_group_mem(queue_t *, mblk_t *,
698 ip_stack_t *ipst);
699 static mblk_t *ip_snmp_get_mib2_virt_multi(queue_t *, mblk_t *,
700 ip_stack_t *ipst);
701 static mblk_t *ip_snmp_get_mib2_multi_rtable(queue_t *, mblk_t *,
702 ip_stack_t *ipst);
703 static mblk_t *ip_snmp_get_mib2_ip_route_media(queue_t *, mblk_t *, int,
704 ip_stack_t *ipst);
705 static mblk_t *ip_snmp_get_mib2_ip6_route_media(queue_t *, mblk_t *, int,
706 ip_stack_t *ipst);
707 static void ip_snmp_get2_v4(ire_t *, iproutedata_t *);
708 static void ip_snmp_get2_v6_route(ire_t *, iproutedata_t *);
709 static int ip_snmp_get2_v4_media(ncec_t *, iproutedata_t *);
710 static int ip_snmp_get2_v6_media(ncec_t *, iproutedata_t *);
711 int ip_snmp_set(queue_t *, int, int, uchar_t *, int);
712
713 static mblk_t *ip_fragment_copyhdr(uchar_t *, int, int, ip_stack_t *,
714 mblk_t *);
715
716 static void conn_drain_init(ip_stack_t *);
717 static void conn_drain_fini(ip_stack_t *);
718 static void conn_drain(conn_t *connp, boolean_t closing);
719
720 static void conn_walk_drain(ip_stack_t *, idl_tx_list_t *);
721 static void conn_walk_sctp(pfv_t, void *, zoneid_t, netstack_t *);
722
723 static void *ip_stack_init(netstackid_t stackid, netstack_t *ns);
724 static void ip_stack_shutdown(netstackid_t stackid, void *arg);
725 static void ip_stack_fini(netstackid_t stackid, void *arg);
726
727 static int ip_multirt_apply_membership(int (*fn)(conn_t *, boolean_t,
728 const in6_addr_t *, ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *),
729 ire_t *, conn_t *, boolean_t, const in6_addr_t *, mcast_record_t,
730 const in6_addr_t *);
731
732 static int ip_squeue_switch(int);
733
734 static void *ip_kstat_init(netstackid_t, ip_stack_t *);
735 static void ip_kstat_fini(netstackid_t, kstat_t *);
736 static int ip_kstat_update(kstat_t *kp, int rw);
737 static void *icmp_kstat_init(netstackid_t);
738 static void icmp_kstat_fini(netstackid_t, kstat_t *);
739 static int icmp_kstat_update(kstat_t *kp, int rw);
740 static void *ip_kstat2_init(netstackid_t, ip_stat_t *);
741 static void ip_kstat2_fini(netstackid_t, kstat_t *);
742
743 static void ipobs_init(ip_stack_t *);
744 static void ipobs_fini(ip_stack_t *);
745
746 static int ip_tp_cpu_update(cpu_setup_t, int, void *);
747
748 ipaddr_t ip_g_all_ones = IP_HOST_MASK;
749
750 static long ip_rput_pullups;
751 int dohwcksum = 1; /* use h/w cksum if supported by the hardware */
752
753 vmem_t *ip_minor_arena_sa; /* for minor nos. from INET_MIN_DEV+2 thru 2^^18-1 */
754 vmem_t *ip_minor_arena_la; /* for minor nos. from 2^^18 thru 2^^32-1 */
755
756 int ip_debug;
757
758 /*
759 * Multirouting/CGTP stuff
760 */
761 int ip_cgtp_filter_rev = CGTP_FILTER_REV; /* CGTP hooks version */
762
763 /*
764 * IP tunables related declarations. Definitions are in ip_tunables.c
765 */
766 extern mod_prop_info_t ip_propinfo_tbl[];
767 extern int ip_propinfo_count;
768
769 /*
770 * Table of IP ioctls encoding the various properties of the ioctl and
771 * indexed based on the last byte of the ioctl command. Occasionally there
772 * is a clash, and there is more than 1 ioctl with the same last byte.
773 * In such a case 1 ioctl is encoded in the ndx table and the remaining
774 * ioctls are encoded in the misc table. An entry in the ndx table is
775 * retrieved by indexing on the last byte of the ioctl command and comparing
776 * the ioctl command with the value in the ndx table. In the event of a
777 * mismatch the misc table is then searched sequentially for the desired
778 * ioctl command.
779 *
780 * Entry: <command> <copyin_size> <flags> <cmd_type> <function> <restart_func>
781 */
782 ip_ioctl_cmd_t ip_ndx_ioctl_table[] = {
783 /* 000 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
784 /* 001 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
785 /* 002 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
786 /* 003 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
787 /* 004 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
788 /* 005 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
789 /* 006 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
790 /* 007 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
791 /* 008 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
792 /* 009 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
793
794 /* 010 */ { SIOCADDRT, sizeof (struct rtentry), IPI_PRIV,
795 MISC_CMD, ip_siocaddrt, NULL },
796 /* 011 */ { SIOCDELRT, sizeof (struct rtentry), IPI_PRIV,
797 MISC_CMD, ip_siocdelrt, NULL },
798
799 /* 012 */ { SIOCSIFADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
800 IF_CMD, ip_sioctl_addr, ip_sioctl_addr_restart },
801 /* 013 */ { SIOCGIFADDR, sizeof (struct ifreq), IPI_GET_CMD,
802 IF_CMD, ip_sioctl_get_addr, NULL },
803
804 /* 014 */ { SIOCSIFDSTADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
805 IF_CMD, ip_sioctl_dstaddr, ip_sioctl_dstaddr_restart },
806 /* 015 */ { SIOCGIFDSTADDR, sizeof (struct ifreq),
807 IPI_GET_CMD, IF_CMD, ip_sioctl_get_dstaddr, NULL },
808
809 /* 016 */ { SIOCSIFFLAGS, sizeof (struct ifreq),
810 IPI_PRIV | IPI_WR,
811 IF_CMD, ip_sioctl_flags, ip_sioctl_flags_restart },
812 /* 017 */ { SIOCGIFFLAGS, sizeof (struct ifreq),
813 IPI_MODOK | IPI_GET_CMD,
814 IF_CMD, ip_sioctl_get_flags, NULL },
815
816 /* 018 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
817 /* 019 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
818
819 /* copyin size cannot be coded for SIOCGIFCONF */
820 /* 020 */ { O_SIOCGIFCONF, 0, IPI_GET_CMD,
821 MISC_CMD, ip_sioctl_get_ifconf, NULL },
822
823 /* 021 */ { SIOCSIFMTU, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
824 IF_CMD, ip_sioctl_mtu, NULL },
825 /* 022 */ { SIOCGIFMTU, sizeof (struct ifreq), IPI_GET_CMD,
826 IF_CMD, ip_sioctl_get_mtu, NULL },
827 /* 023 */ { SIOCGIFBRDADDR, sizeof (struct ifreq),
828 IPI_GET_CMD, IF_CMD, ip_sioctl_get_brdaddr, NULL },
829 /* 024 */ { SIOCSIFBRDADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
830 IF_CMD, ip_sioctl_brdaddr, NULL },
831 /* 025 */ { SIOCGIFNETMASK, sizeof (struct ifreq),
832 IPI_GET_CMD, IF_CMD, ip_sioctl_get_netmask, NULL },
833 /* 026 */ { SIOCSIFNETMASK, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
834 IF_CMD, ip_sioctl_netmask, ip_sioctl_netmask_restart },
835 /* 027 */ { SIOCGIFMETRIC, sizeof (struct ifreq),
836 IPI_GET_CMD, IF_CMD, ip_sioctl_get_metric, NULL },
837 /* 028 */ { SIOCSIFMETRIC, sizeof (struct ifreq), IPI_PRIV,
838 IF_CMD, ip_sioctl_metric, NULL },
839 /* 029 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
840
841 /* See 166-168 below for extended SIOC*XARP ioctls */
842 /* 030 */ { SIOCSARP, sizeof (struct arpreq), IPI_PRIV | IPI_WR,
843 ARP_CMD, ip_sioctl_arp, NULL },
844 /* 031 */ { SIOCGARP, sizeof (struct arpreq), IPI_GET_CMD,
845 ARP_CMD, ip_sioctl_arp, NULL },
846 /* 032 */ { SIOCDARP, sizeof (struct arpreq), IPI_PRIV | IPI_WR,
847 ARP_CMD, ip_sioctl_arp, NULL },
848
849 /* 033 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
850 /* 034 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
851 /* 035 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
852 /* 036 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
853 /* 037 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
854 /* 038 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
855 /* 039 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
856 /* 040 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
857 /* 041 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
858 /* 042 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
859 /* 043 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
860 /* 044 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
861 /* 045 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
862 /* 046 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
863 /* 047 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
864 /* 048 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
865 /* 049 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
866 /* 050 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
867 /* 051 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
868 /* 052 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
869 /* 053 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
870
871 /* 054 */ { IF_UNITSEL, sizeof (int), IPI_PRIV | IPI_WR | IPI_MODOK,
872 MISC_CMD, if_unitsel, if_unitsel_restart },
873
874 /* 055 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
875 /* 056 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
876 /* 057 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
877 /* 058 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
878 /* 059 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
879 /* 060 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
880 /* 061 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
881 /* 062 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
882 /* 063 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
883 /* 064 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
884 /* 065 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
885 /* 066 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
886 /* 067 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
887 /* 068 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
888 /* 069 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
889 /* 070 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
890 /* 071 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
891 /* 072 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
892
893 /* 073 */ { SIOCSIFNAME, sizeof (struct ifreq),
894 IPI_PRIV | IPI_WR | IPI_MODOK,
895 IF_CMD, ip_sioctl_sifname, NULL },
896
897 /* 074 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
898 /* 075 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
899 /* 076 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
900 /* 077 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
901 /* 078 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
902 /* 079 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
903 /* 080 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
904 /* 081 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
905 /* 082 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
906 /* 083 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
907 /* 084 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
908 /* 085 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
909 /* 086 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
910
911 /* 087 */ { SIOCGIFNUM, sizeof (int), IPI_GET_CMD,
912 MISC_CMD, ip_sioctl_get_ifnum, NULL },
913 /* 088 */ { SIOCGIFMUXID, sizeof (struct ifreq), IPI_GET_CMD,
914 IF_CMD, ip_sioctl_get_muxid, NULL },
915 /* 089 */ { SIOCSIFMUXID, sizeof (struct ifreq),
916 IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_muxid, NULL },
917
918 /* Both if and lif variants share same func */
919 /* 090 */ { SIOCGIFINDEX, sizeof (struct ifreq), IPI_GET_CMD,
920 IF_CMD, ip_sioctl_get_lifindex, NULL },
921 /* Both if and lif variants share same func */
922 /* 091 */ { SIOCSIFINDEX, sizeof (struct ifreq),
923 IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_slifindex, NULL },
924
925 /* copyin size cannot be coded for SIOCGIFCONF */
926 /* 092 */ { SIOCGIFCONF, 0, IPI_GET_CMD,
927 MISC_CMD, ip_sioctl_get_ifconf, NULL },
928 /* 093 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
929 /* 094 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
930 /* 095 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
931 /* 096 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
932 /* 097 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
933 /* 098 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
934 /* 099 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
935 /* 100 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
936 /* 101 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
937 /* 102 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
938 /* 103 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
939 /* 104 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
940 /* 105 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
941 /* 106 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
942 /* 107 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
943 /* 108 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
944 /* 109 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
945
946 /* 110 */ { SIOCLIFREMOVEIF, sizeof (struct lifreq),
947 IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_removeif,
948 ip_sioctl_removeif_restart },
949 /* 111 */ { SIOCLIFADDIF, sizeof (struct lifreq),
950 IPI_GET_CMD | IPI_PRIV | IPI_WR,
951 LIF_CMD, ip_sioctl_addif, NULL },
952 #define SIOCLIFADDR_NDX 112
953 /* 112 */ { SIOCSLIFADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
954 LIF_CMD, ip_sioctl_addr, ip_sioctl_addr_restart },
955 /* 113 */ { SIOCGLIFADDR, sizeof (struct lifreq),
956 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_addr, NULL },
957 /* 114 */ { SIOCSLIFDSTADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
958 LIF_CMD, ip_sioctl_dstaddr, ip_sioctl_dstaddr_restart },
959 /* 115 */ { SIOCGLIFDSTADDR, sizeof (struct lifreq),
960 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_dstaddr, NULL },
961 /* 116 */ { SIOCSLIFFLAGS, sizeof (struct lifreq),
962 IPI_PRIV | IPI_WR,
963 LIF_CMD, ip_sioctl_flags, ip_sioctl_flags_restart },
964 /* 117 */ { SIOCGLIFFLAGS, sizeof (struct lifreq),
965 IPI_GET_CMD | IPI_MODOK,
966 LIF_CMD, ip_sioctl_get_flags, NULL },
967
968 /* 118 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
969 /* 119 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
970
971 /* 120 */ { O_SIOCGLIFCONF, 0, IPI_GET_CMD, MISC_CMD,
972 ip_sioctl_get_lifconf, NULL },
973 /* 121 */ { SIOCSLIFMTU, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
974 LIF_CMD, ip_sioctl_mtu, NULL },
975 /* 122 */ { SIOCGLIFMTU, sizeof (struct lifreq), IPI_GET_CMD,
976 LIF_CMD, ip_sioctl_get_mtu, NULL },
977 /* 123 */ { SIOCGLIFBRDADDR, sizeof (struct lifreq),
978 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_brdaddr, NULL },
979 /* 124 */ { SIOCSLIFBRDADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
980 LIF_CMD, ip_sioctl_brdaddr, NULL },
981 /* 125 */ { SIOCGLIFNETMASK, sizeof (struct lifreq),
982 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_netmask, NULL },
983 /* 126 */ { SIOCSLIFNETMASK, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
984 LIF_CMD, ip_sioctl_netmask, ip_sioctl_netmask_restart },
985 /* 127 */ { SIOCGLIFMETRIC, sizeof (struct lifreq),
986 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_metric, NULL },
987 /* 128 */ { SIOCSLIFMETRIC, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
988 LIF_CMD, ip_sioctl_metric, NULL },
989 /* 129 */ { SIOCSLIFNAME, sizeof (struct lifreq),
990 IPI_PRIV | IPI_WR | IPI_MODOK,
991 LIF_CMD, ip_sioctl_slifname,
992 ip_sioctl_slifname_restart },
993
994 /* 130 */ { SIOCGLIFNUM, sizeof (struct lifnum), IPI_GET_CMD,
995 MISC_CMD, ip_sioctl_get_lifnum, NULL },
996 /* 131 */ { SIOCGLIFMUXID, sizeof (struct lifreq),
997 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_muxid, NULL },
998 /* 132 */ { SIOCSLIFMUXID, sizeof (struct lifreq),
999 IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_muxid, NULL },
1000 /* 133 */ { SIOCGLIFINDEX, sizeof (struct lifreq),
1001 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lifindex, 0 },
1002 /* 134 */ { SIOCSLIFINDEX, sizeof (struct lifreq),
1003 IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_slifindex, 0 },
1004 /* 135 */ { SIOCSLIFTOKEN, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
1005 LIF_CMD, ip_sioctl_token, NULL },
1006 /* 136 */ { SIOCGLIFTOKEN, sizeof (struct lifreq),
1007 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_token, NULL },
1008 /* 137 */ { SIOCSLIFSUBNET, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
1009 LIF_CMD, ip_sioctl_subnet, ip_sioctl_subnet_restart },
1010 /* 138 */ { SIOCGLIFSUBNET, sizeof (struct lifreq),
1011 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_subnet, NULL },
1012 /* 139 */ { SIOCSLIFLNKINFO, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
1013 LIF_CMD, ip_sioctl_lnkinfo, NULL },
1014
1015 /* 140 */ { SIOCGLIFLNKINFO, sizeof (struct lifreq),
1016 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lnkinfo, NULL },
1017 /* 141 */ { SIOCLIFDELND, sizeof (struct lifreq), IPI_PRIV,
1018 LIF_CMD, ip_siocdelndp_v6, NULL },
1019 /* 142 */ { SIOCLIFGETND, sizeof (struct lifreq), IPI_GET_CMD,
1020 LIF_CMD, ip_siocqueryndp_v6, NULL },
1021 /* 143 */ { SIOCLIFSETND, sizeof (struct lifreq), IPI_PRIV,
1022 LIF_CMD, ip_siocsetndp_v6, NULL },
1023 /* 144 */ { SIOCTMYADDR, sizeof (struct sioc_addrreq), IPI_GET_CMD,
1024 MISC_CMD, ip_sioctl_tmyaddr, NULL },
1025 /* 145 */ { SIOCTONLINK, sizeof (struct sioc_addrreq), IPI_GET_CMD,
1026 MISC_CMD, ip_sioctl_tonlink, NULL },
1027 /* 146 */ { SIOCTMYSITE, sizeof (struct sioc_addrreq), 0,
1028 MISC_CMD, ip_sioctl_tmysite, NULL },
1029 /* 147 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1030 /* 148 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1031
1032 /* Old *IPSECONFIG ioctls are now deprecated, now see spdsock.c */
1033 /* 149 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1034 /* 150 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1035 /* 151 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1036 /* 152 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1037
1038 /* 153 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1039
1040 /* 154 */ { SIOCGLIFBINDING, sizeof (struct lifreq), IPI_GET_CMD,
1041 LIF_CMD, ip_sioctl_get_binding, NULL },
1042 /* 155 */ { SIOCSLIFGROUPNAME, sizeof (struct lifreq),
1043 IPI_PRIV | IPI_WR,
1044 LIF_CMD, ip_sioctl_groupname, ip_sioctl_groupname },
1045 /* 156 */ { SIOCGLIFGROUPNAME, sizeof (struct lifreq),
1046 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_groupname, NULL },
1047 /* 157 */ { SIOCGLIFGROUPINFO, sizeof (lifgroupinfo_t),
1048 IPI_GET_CMD, MISC_CMD, ip_sioctl_groupinfo, NULL },
1049
1050 /* Leave 158-160 unused; used to be SIOC*IFARP ioctls */
1051 /* 158 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1052 /* 159 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1053 /* 160 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1054
1055 /* 161 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1056
1057 /* These are handled in ip_sioctl_copyin_setup itself */
1058 /* 162 */ { SIOCGIP6ADDRPOLICY, 0, IPI_NULL_BCONT,
1059 MISC_CMD, NULL, NULL },
1060 /* 163 */ { SIOCSIP6ADDRPOLICY, 0, IPI_PRIV | IPI_NULL_BCONT,
1061 MISC_CMD, NULL, NULL },
1062 /* 164 */ { SIOCGDSTINFO, 0, IPI_GET_CMD, MISC_CMD, NULL, NULL },
1063
1064 /* 165 */ { SIOCGLIFCONF, 0, IPI_GET_CMD, MISC_CMD,
1065 ip_sioctl_get_lifconf, NULL },
1066
1067 /* 166 */ { SIOCSXARP, sizeof (struct xarpreq), IPI_PRIV | IPI_WR,
1068 XARP_CMD, ip_sioctl_arp, NULL },
1069 /* 167 */ { SIOCGXARP, sizeof (struct xarpreq), IPI_GET_CMD,
1070 XARP_CMD, ip_sioctl_arp, NULL },
1071 /* 168 */ { SIOCDXARP, sizeof (struct xarpreq), IPI_PRIV | IPI_WR,
1072 XARP_CMD, ip_sioctl_arp, NULL },
1073
1074 /* SIOCPOPSOCKFS is not handled by IP */
1075 /* 169 */ { IPI_DONTCARE /* SIOCPOPSOCKFS */, 0, 0, 0, NULL, NULL },
1076
1077 /* 170 */ { SIOCGLIFZONE, sizeof (struct lifreq),
1078 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lifzone, NULL },
1079 /* 171 */ { SIOCSLIFZONE, sizeof (struct lifreq),
1080 IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_slifzone,
1081 ip_sioctl_slifzone_restart },
1082 /* 172-174 are SCTP ioctls and not handled by IP */
1083 /* 172 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1084 /* 173 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1085 /* 174 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1086 /* 175 */ { SIOCGLIFUSESRC, sizeof (struct lifreq),
1087 IPI_GET_CMD, LIF_CMD,
1088 ip_sioctl_get_lifusesrc, 0 },
1089 /* 176 */ { SIOCSLIFUSESRC, sizeof (struct lifreq),
1090 IPI_PRIV | IPI_WR,
1091 LIF_CMD, ip_sioctl_slifusesrc,
1092 NULL },
1093 /* 177 */ { SIOCGLIFSRCOF, 0, IPI_GET_CMD, MISC_CMD,
1094 ip_sioctl_get_lifsrcof, NULL },
1095 /* 178 */ { SIOCGMSFILTER, sizeof (struct group_filter), IPI_GET_CMD,
1096 MSFILT_CMD, ip_sioctl_msfilter, NULL },
1097 /* 179 */ { SIOCSMSFILTER, sizeof (struct group_filter), 0,
1098 MSFILT_CMD, ip_sioctl_msfilter, NULL },
1099 /* 180 */ { SIOCGIPMSFILTER, sizeof (struct ip_msfilter), IPI_GET_CMD,
1100 MSFILT_CMD, ip_sioctl_msfilter, NULL },
1101 /* 181 */ { SIOCSIPMSFILTER, sizeof (struct ip_msfilter), 0,
1102 MSFILT_CMD, ip_sioctl_msfilter, NULL },
1103 /* 182 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1104 /* SIOCSENABLESDP is handled by SDP */
1105 /* 183 */ { IPI_DONTCARE /* SIOCSENABLESDP */, 0, 0, 0, NULL, NULL },
1106 /* 184 */ { IPI_DONTCARE /* SIOCSQPTR */, 0, 0, 0, NULL, NULL },
1107 /* 185 */ { SIOCGIFHWADDR, sizeof (struct ifreq), IPI_GET_CMD,
1108 IF_CMD, ip_sioctl_get_ifhwaddr, NULL },
1109 /* 186 */ { IPI_DONTCARE /* SIOCGSTAMP */, 0, 0, 0, NULL, NULL },
1110 /* 187 */ { SIOCILB, 0, IPI_PRIV | IPI_GET_CMD, MISC_CMD,
1111 ip_sioctl_ilb_cmd, NULL },
1112 /* 188 */ { SIOCGETPROP, 0, IPI_GET_CMD, 0, NULL, NULL },
1113 /* 189 */ { SIOCSETPROP, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL},
1114 /* 190 */ { SIOCGLIFDADSTATE, sizeof (struct lifreq),
1115 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_dadstate, NULL },
1116 /* 191 */ { SIOCSLIFPREFIX, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
1117 LIF_CMD, ip_sioctl_prefix, ip_sioctl_prefix_restart },
1118 /* 192 */ { SIOCGLIFHWADDR, sizeof (struct lifreq), IPI_GET_CMD,
1119 LIF_CMD, ip_sioctl_get_lifhwaddr, NULL }
1120 };
1121
1122 int ip_ndx_ioctl_count = sizeof (ip_ndx_ioctl_table) / sizeof (ip_ioctl_cmd_t);
1123
1124 ip_ioctl_cmd_t ip_misc_ioctl_table[] = {
1125 { I_LINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1126 { I_UNLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1127 { I_PLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1128 { I_PUNLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1129 { ND_GET, 0, 0, 0, NULL, NULL },
1130 { ND_SET, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1131 { IP_IOCTL, 0, 0, 0, NULL, NULL },
1132 { SIOCGETVIFCNT, sizeof (struct sioc_vif_req), IPI_GET_CMD,
1133 MISC_CMD, mrt_ioctl},
1134 { SIOCGETSGCNT, sizeof (struct sioc_sg_req), IPI_GET_CMD,
1135 MISC_CMD, mrt_ioctl},
1136 { SIOCGETLSGCNT, sizeof (struct sioc_lsg_req), IPI_GET_CMD,
1137 MISC_CMD, mrt_ioctl}
1138 };
1139
1140 int ip_misc_ioctl_count =
1141 sizeof (ip_misc_ioctl_table) / sizeof (ip_ioctl_cmd_t);
1142
1143 int conn_drain_nthreads; /* Number of drainers reqd. */
1144 /* Settable in /etc/system */
1145 /* Defined in ip_ire.c */
1146 extern uint32_t ip_ire_max_bucket_cnt, ip6_ire_max_bucket_cnt;
1147 extern uint32_t ip_ire_min_bucket_cnt, ip6_ire_min_bucket_cnt;
1148 extern uint32_t ip_ire_mem_ratio, ip_ire_cpu_ratio;
1149
1150 static nv_t ire_nv_arr[] = {
1151 { IRE_BROADCAST, "BROADCAST" },
1152 { IRE_LOCAL, "LOCAL" },
1153 { IRE_LOOPBACK, "LOOPBACK" },
1154 { IRE_DEFAULT, "DEFAULT" },
1155 { IRE_PREFIX, "PREFIX" },
1156 { IRE_IF_NORESOLVER, "IF_NORESOL" },
1157 { IRE_IF_RESOLVER, "IF_RESOLV" },
1158 { IRE_IF_CLONE, "IF_CLONE" },
1159 { IRE_HOST, "HOST" },
1160 { IRE_MULTICAST, "MULTICAST" },
1161 { IRE_NOROUTE, "NOROUTE" },
1162 { 0 }
1163 };
1164
1165 nv_t *ire_nv_tbl = ire_nv_arr;
1166
1167 /* Simple ICMP IP Header Template */
1168 static ipha_t icmp_ipha = {
1169 IP_SIMPLE_HDR_VERSION, 0, 0, 0, 0, 0, IPPROTO_ICMP
1170 };
1171
1172 struct module_info ip_mod_info = {
1173 IP_MOD_ID, IP_MOD_NAME, IP_MOD_MINPSZ, IP_MOD_MAXPSZ, IP_MOD_HIWAT,
1174 IP_MOD_LOWAT
1175 };
1176
1177 /*
1178 * Duplicate static symbols within a module confuses mdb; so we avoid the
1179 * problem by making the symbols here distinct from those in udp.c.
1180 */
1181
1182 /*
1183 * Entry points for IP as a device and as a module.
1184 * We have separate open functions for the /dev/ip and /dev/ip6 devices.
1185 */
1186 static struct qinit iprinitv4 = {
1187 (pfi_t)ip_rput, NULL, ip_openv4, ip_close, NULL,
1188 &ip_mod_info
1189 };
1190
1191 struct qinit iprinitv6 = {
1192 (pfi_t)ip_rput_v6, NULL, ip_openv6, ip_close, NULL,
1193 &ip_mod_info
1194 };
1195
1196 static struct qinit ipwinit = {
1197 (pfi_t)ip_wput_nondata, (pfi_t)ip_wsrv, NULL, NULL, NULL,
1198 &ip_mod_info
1199 };
1200
1201 static struct qinit iplrinit = {
1202 (pfi_t)ip_lrput, NULL, ip_openv4, ip_close, NULL,
1203 &ip_mod_info
1204 };
1205
1206 static struct qinit iplwinit = {
1207 (pfi_t)ip_lwput, NULL, NULL, NULL, NULL,
1208 &ip_mod_info
1209 };
1210
1211 /* For AF_INET aka /dev/ip */
1212 struct streamtab ipinfov4 = {
1213 &iprinitv4, &ipwinit, &iplrinit, &iplwinit
1214 };
1215
1216 /* For AF_INET6 aka /dev/ip6 */
1217 struct streamtab ipinfov6 = {
1218 &iprinitv6, &ipwinit, &iplrinit, &iplwinit
1219 };
1220
1221 #ifdef DEBUG
1222 boolean_t skip_sctp_cksum = B_FALSE;
1223 #endif
1224
1225 /*
1226 * Generate an ICMP fragmentation needed message.
1227 * When called from ip_output side a minimal ip_recv_attr_t needs to be
1228 * constructed by the caller.
1229 */
1230 void
1231 icmp_frag_needed(mblk_t *mp, int mtu, ip_recv_attr_t *ira)
1232 {
1233 icmph_t icmph;
1234 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
1235
1236 mp = icmp_pkt_err_ok(mp, ira);
1237 if (mp == NULL)
1238 return;
1239
1240 bzero(&icmph, sizeof (icmph_t));
1241 icmph.icmph_type = ICMP_DEST_UNREACHABLE;
1242 icmph.icmph_code = ICMP_FRAGMENTATION_NEEDED;
1243 icmph.icmph_du_mtu = htons((uint16_t)mtu);
1244 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutFragNeeded);
1245 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDestUnreachs);
1246
1247 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
1248 }
1249
1250 /*
1251 * icmp_inbound_v4 deals with ICMP messages that are handled by IP.
1252 * If the ICMP message is consumed by IP, i.e., it should not be delivered
1253 * to any IPPROTO_ICMP raw sockets, then it returns NULL.
1254 * Likewise, if the ICMP error is misformed (too short, etc), then it
1255 * returns NULL. The caller uses this to determine whether or not to send
1256 * to raw sockets.
1257 *
1258 * All error messages are passed to the matching transport stream.
1259 *
1260 * The following cases are handled by icmp_inbound:
1261 * 1) It needs to send a reply back and possibly delivering it
1262 * to the "interested" upper clients.
1263 * 2) Return the mblk so that the caller can pass it to the RAW socket clients.
1264 * 3) It needs to change some values in IP only.
1265 * 4) It needs to change some values in IP and upper layers e.g TCP
1266 * by delivering an error to the upper layers.
1267 *
1268 * We handle the above three cases in the context of IPsec in the
1269 * following way :
1270 *
1271 * 1) Send the reply back in the same way as the request came in.
1272 * If it came in encrypted, it goes out encrypted. If it came in
1273 * clear, it goes out in clear. Thus, this will prevent chosen
1274 * plain text attack.
1275 * 2) The client may or may not expect things to come in secure.
1276 * If it comes in secure, the policy constraints are checked
1277 * before delivering it to the upper layers. If it comes in
1278 * clear, ipsec_inbound_accept_clear will decide whether to
1279 * accept this in clear or not. In both the cases, if the returned
1280 * message (IP header + 8 bytes) that caused the icmp message has
1281 * AH/ESP headers, it is sent up to AH/ESP for validation before
1282 * sending up. If there are only 8 bytes of returned message, then
1283 * upper client will not be notified.
1284 * 3) Check with global policy to see whether it matches the constaints.
1285 * But this will be done only if icmp_accept_messages_in_clear is
1286 * zero.
1287 * 4) If we need to change both in IP and ULP, then the decision taken
1288 * while affecting the values in IP and while delivering up to TCP
1289 * should be the same.
1290 *
1291 * There are two cases.
1292 *
1293 * a) If we reject data at the IP layer (ipsec_check_global_policy()
1294 * failed), we will not deliver it to the ULP, even though they
1295 * are *willing* to accept in *clear*. This is fine as our global
1296 * disposition to icmp messages asks us reject the datagram.
1297 *
1298 * b) If we accept data at the IP layer (ipsec_check_global_policy()
1299 * succeeded or icmp_accept_messages_in_clear is 1), and not able
1300 * to deliver it to ULP (policy failed), it can lead to
1301 * consistency problems. The cases known at this time are
1302 * ICMP_DESTINATION_UNREACHABLE messages with following code
1303 * values :
1304 *
1305 * - ICMP_FRAGMENTATION_NEEDED : IP adapts to the new value
1306 * and Upper layer rejects. Then the communication will
1307 * come to a stop. This is solved by making similar decisions
1308 * at both levels. Currently, when we are unable to deliver
1309 * to the Upper Layer (due to policy failures) while IP has
1310 * adjusted dce_pmtu, the next outbound datagram would
1311 * generate a local ICMP_FRAGMENTATION_NEEDED message - which
1312 * will be with the right level of protection. Thus the right
1313 * value will be communicated even if we are not able to
1314 * communicate when we get from the wire initially. But this
1315 * assumes there would be at least one outbound datagram after
1316 * IP has adjusted its dce_pmtu value. To make things
1317 * simpler, we accept in clear after the validation of
1318 * AH/ESP headers.
1319 *
1320 * - Other ICMP ERRORS : We may not be able to deliver it to the
1321 * upper layer depending on the level of protection the upper
1322 * layer expects and the disposition in ipsec_inbound_accept_clear().
1323 * ipsec_inbound_accept_clear() decides whether a given ICMP error
1324 * should be accepted in clear when the Upper layer expects secure.
1325 * Thus the communication may get aborted by some bad ICMP
1326 * packets.
1327 */
1328 mblk_t *
1329 icmp_inbound_v4(mblk_t *mp, ip_recv_attr_t *ira)
1330 {
1331 icmph_t *icmph;
1332 ipha_t *ipha; /* Outer header */
1333 int ip_hdr_length; /* Outer header length */
1334 boolean_t interested;
1335 ipif_t *ipif;
1336 uint32_t ts;
1337 uint32_t *tsp;
1338 timestruc_t now;
1339 ill_t *ill = ira->ira_ill;
1340 ip_stack_t *ipst = ill->ill_ipst;
1341 zoneid_t zoneid = ira->ira_zoneid;
1342 int len_needed;
1343 mblk_t *mp_ret = NULL;
1344
1345 ipha = (ipha_t *)mp->b_rptr;
1346
1347 BUMP_MIB(&ipst->ips_icmp_mib, icmpInMsgs);
1348
1349 ip_hdr_length = ira->ira_ip_hdr_length;
1350 if ((mp->b_wptr - mp->b_rptr) < (ip_hdr_length + ICMPH_SIZE)) {
1351 if (ira->ira_pktlen < (ip_hdr_length + ICMPH_SIZE)) {
1352 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
1353 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
1354 freemsg(mp);
1355 return (NULL);
1356 }
1357 /* Last chance to get real. */
1358 ipha = ip_pullup(mp, ip_hdr_length + ICMPH_SIZE, ira);
1359 if (ipha == NULL) {
1360 BUMP_MIB(&ipst->ips_icmp_mib, icmpInErrors);
1361 freemsg(mp);
1362 return (NULL);
1363 }
1364 }
1365
1366 /* The IP header will always be a multiple of four bytes */
1367 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1368 ip2dbg(("icmp_inbound_v4: type %d code %d\n", icmph->icmph_type,
1369 icmph->icmph_code));
1370
1371 /*
1372 * We will set "interested" to "true" if we should pass a copy to
1373 * the transport or if we handle the packet locally.
1374 */
1375 interested = B_FALSE;
1376 switch (icmph->icmph_type) {
1377 case ICMP_ECHO_REPLY:
1378 BUMP_MIB(&ipst->ips_icmp_mib, icmpInEchoReps);
1379 break;
1380 case ICMP_DEST_UNREACHABLE:
1381 if (icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED)
1382 BUMP_MIB(&ipst->ips_icmp_mib, icmpInFragNeeded);
1383 interested = B_TRUE; /* Pass up to transport */
1384 BUMP_MIB(&ipst->ips_icmp_mib, icmpInDestUnreachs);
1385 break;
1386 case ICMP_SOURCE_QUENCH:
1387 interested = B_TRUE; /* Pass up to transport */
1388 BUMP_MIB(&ipst->ips_icmp_mib, icmpInSrcQuenchs);
1389 break;
1390 case ICMP_REDIRECT:
1391 if (!ipst->ips_ip_ignore_redirect)
1392 interested = B_TRUE;
1393 BUMP_MIB(&ipst->ips_icmp_mib, icmpInRedirects);
1394 break;
1395 case ICMP_ECHO_REQUEST:
1396 /*
1397 * Whether to respond to echo requests that come in as IP
1398 * broadcasts or as IP multicast is subject to debate
1399 * (what isn't?). We aim to please, you pick it.
1400 * Default is do it.
1401 */
1402 if (ira->ira_flags & IRAF_MULTICAST) {
1403 /* multicast: respond based on tunable */
1404 interested = ipst->ips_ip_g_resp_to_echo_mcast;
1405 } else if (ira->ira_flags & IRAF_BROADCAST) {
1406 /* broadcast: respond based on tunable */
1407 interested = ipst->ips_ip_g_resp_to_echo_bcast;
1408 } else {
1409 /* unicast: always respond */
1410 interested = B_TRUE;
1411 }
1412 BUMP_MIB(&ipst->ips_icmp_mib, icmpInEchos);
1413 if (!interested) {
1414 /* We never pass these to RAW sockets */
1415 freemsg(mp);
1416 return (NULL);
1417 }
1418
1419 /* Check db_ref to make sure we can modify the packet. */
1420 if (mp->b_datap->db_ref > 1) {
1421 mblk_t *mp1;
1422
1423 mp1 = copymsg(mp);
1424 freemsg(mp);
1425 if (!mp1) {
1426 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
1427 return (NULL);
1428 }
1429 mp = mp1;
1430 ipha = (ipha_t *)mp->b_rptr;
1431 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1432 }
1433 icmph->icmph_type = ICMP_ECHO_REPLY;
1434 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutEchoReps);
1435 icmp_send_reply_v4(mp, ipha, icmph, ira);
1436 return (NULL);
1437
1438 case ICMP_ROUTER_ADVERTISEMENT:
1439 case ICMP_ROUTER_SOLICITATION:
1440 break;
1441 case ICMP_TIME_EXCEEDED:
1442 interested = B_TRUE; /* Pass up to transport */
1443 BUMP_MIB(&ipst->ips_icmp_mib, icmpInTimeExcds);
1444 break;
1445 case ICMP_PARAM_PROBLEM:
1446 interested = B_TRUE; /* Pass up to transport */
1447 BUMP_MIB(&ipst->ips_icmp_mib, icmpInParmProbs);
1448 break;
1449 case ICMP_TIME_STAMP_REQUEST:
1450 /* Response to Time Stamp Requests is local policy. */
1451 if (ipst->ips_ip_g_resp_to_timestamp) {
1452 if (ira->ira_flags & IRAF_MULTIBROADCAST)
1453 interested =
1454 ipst->ips_ip_g_resp_to_timestamp_bcast;
1455 else
1456 interested = B_TRUE;
1457 }
1458 if (!interested) {
1459 /* We never pass these to RAW sockets */
1460 freemsg(mp);
1461 return (NULL);
1462 }
1463
1464 /* Make sure we have enough of the packet */
1465 len_needed = ip_hdr_length + ICMPH_SIZE +
1466 3 * sizeof (uint32_t);
1467
1468 if (mp->b_wptr - mp->b_rptr < len_needed) {
1469 ipha = ip_pullup(mp, len_needed, ira);
1470 if (ipha == NULL) {
1471 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1472 ip_drop_input("ipIfStatsInDiscards - ip_pullup",
1473 mp, ill);
1474 freemsg(mp);
1475 return (NULL);
1476 }
1477 /* Refresh following the pullup. */
1478 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1479 }
1480 BUMP_MIB(&ipst->ips_icmp_mib, icmpInTimestamps);
1481 /* Check db_ref to make sure we can modify the packet. */
1482 if (mp->b_datap->db_ref > 1) {
1483 mblk_t *mp1;
1484
1485 mp1 = copymsg(mp);
1486 freemsg(mp);
1487 if (!mp1) {
1488 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
1489 return (NULL);
1490 }
1491 mp = mp1;
1492 ipha = (ipha_t *)mp->b_rptr;
1493 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1494 }
1495 icmph->icmph_type = ICMP_TIME_STAMP_REPLY;
1496 tsp = (uint32_t *)&icmph[1];
1497 tsp++; /* Skip past 'originate time' */
1498 /* Compute # of milliseconds since midnight */
1499 gethrestime(&now);
1500 ts = (now.tv_sec % (24 * 60 * 60)) * 1000 +
1501 NSEC2MSEC(now.tv_nsec);
1502 *tsp++ = htonl(ts); /* Lay in 'receive time' */
1503 *tsp++ = htonl(ts); /* Lay in 'send time' */
1504 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutTimestampReps);
1505 icmp_send_reply_v4(mp, ipha, icmph, ira);
1506 return (NULL);
1507
1508 case ICMP_TIME_STAMP_REPLY:
1509 BUMP_MIB(&ipst->ips_icmp_mib, icmpInTimestampReps);
1510 break;
1511 case ICMP_INFO_REQUEST:
1512 /* Per RFC 1122 3.2.2.7, ignore this. */
1513 case ICMP_INFO_REPLY:
1514 break;
1515 case ICMP_ADDRESS_MASK_REQUEST:
1516 if (ira->ira_flags & IRAF_MULTIBROADCAST) {
1517 interested =
1518 ipst->ips_ip_respond_to_address_mask_broadcast;
1519 } else {
1520 interested = B_TRUE;
1521 }
1522 if (!interested) {
1523 /* We never pass these to RAW sockets */
1524 freemsg(mp);
1525 return (NULL);
1526 }
1527 len_needed = ip_hdr_length + ICMPH_SIZE + IP_ADDR_LEN;
1528 if (mp->b_wptr - mp->b_rptr < len_needed) {
1529 ipha = ip_pullup(mp, len_needed, ira);
1530 if (ipha == NULL) {
1531 BUMP_MIB(ill->ill_ip_mib,
1532 ipIfStatsInTruncatedPkts);
1533 ip_drop_input("ipIfStatsInTruncatedPkts", mp,
1534 ill);
1535 freemsg(mp);
1536 return (NULL);
1537 }
1538 /* Refresh following the pullup. */
1539 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1540 }
1541 BUMP_MIB(&ipst->ips_icmp_mib, icmpInAddrMasks);
1542 /* Check db_ref to make sure we can modify the packet. */
1543 if (mp->b_datap->db_ref > 1) {
1544 mblk_t *mp1;
1545
1546 mp1 = copymsg(mp);
1547 freemsg(mp);
1548 if (!mp1) {
1549 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
1550 return (NULL);
1551 }
1552 mp = mp1;
1553 ipha = (ipha_t *)mp->b_rptr;
1554 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1555 }
1556 /*
1557 * Need the ipif with the mask be the same as the source
1558 * address of the mask reply. For unicast we have a specific
1559 * ipif. For multicast/broadcast we only handle onlink
1560 * senders, and use the source address to pick an ipif.
1561 */
1562 ipif = ipif_lookup_addr(ipha->ipha_dst, ill, zoneid, ipst);
1563 if (ipif == NULL) {
1564 /* Broadcast or multicast */
1565 ipif = ipif_lookup_remote(ill, ipha->ipha_src, zoneid);
1566 if (ipif == NULL) {
1567 freemsg(mp);
1568 return (NULL);
1569 }
1570 }
1571 icmph->icmph_type = ICMP_ADDRESS_MASK_REPLY;
1572 bcopy(&ipif->ipif_net_mask, &icmph[1], IP_ADDR_LEN);
1573 ipif_refrele(ipif);
1574 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutAddrMaskReps);
1575 icmp_send_reply_v4(mp, ipha, icmph, ira);
1576 return (NULL);
1577
1578 case ICMP_ADDRESS_MASK_REPLY:
1579 BUMP_MIB(&ipst->ips_icmp_mib, icmpInAddrMaskReps);
1580 break;
1581 default:
1582 interested = B_TRUE; /* Pass up to transport */
1583 BUMP_MIB(&ipst->ips_icmp_mib, icmpInUnknowns);
1584 break;
1585 }
1586 /*
1587 * See if there is an ICMP client to avoid an extra copymsg/freemsg
1588 * if there isn't one.
1589 */
1590 if (ipst->ips_ipcl_proto_fanout_v4[IPPROTO_ICMP].connf_head != NULL) {
1591 /* If there is an ICMP client and we want one too, copy it. */
1592
1593 if (!interested) {
1594 /* Caller will deliver to RAW sockets */
1595 return (mp);
1596 }
1597 mp_ret = copymsg(mp);
1598 if (mp_ret == NULL) {
1599 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1600 ip_drop_input("ipIfStatsInDiscards - copymsg", mp, ill);
1601 }
1602 } else if (!interested) {
1603 /* Neither we nor raw sockets are interested. Drop packet now */
1604 freemsg(mp);
1605 return (NULL);
1606 }
1607
1608 /*
1609 * ICMP error or redirect packet. Make sure we have enough of
1610 * the header and that db_ref == 1 since we might end up modifying
1611 * the packet.
1612 */
1613 if (mp->b_cont != NULL) {
1614 if (ip_pullup(mp, -1, ira) == NULL) {
1615 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1616 ip_drop_input("ipIfStatsInDiscards - ip_pullup",
1617 mp, ill);
1618 freemsg(mp);
1619 return (mp_ret);
1620 }
1621 }
1622
1623 if (mp->b_datap->db_ref > 1) {
1624 mblk_t *mp1;
1625
1626 mp1 = copymsg(mp);
1627 if (mp1 == NULL) {
1628 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1629 ip_drop_input("ipIfStatsInDiscards - copymsg", mp, ill);
1630 freemsg(mp);
1631 return (mp_ret);
1632 }
1633 freemsg(mp);
1634 mp = mp1;
1635 }
1636
1637 /*
1638 * In case mp has changed, verify the message before any further
1639 * processes.
1640 */
1641 ipha = (ipha_t *)mp->b_rptr;
1642 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1643 if (!icmp_inbound_verify_v4(mp, icmph, ira)) {
1644 freemsg(mp);
1645 return (mp_ret);
1646 }
1647
1648 switch (icmph->icmph_type) {
1649 case ICMP_REDIRECT:
1650 icmp_redirect_v4(mp, ipha, icmph, ira);
1651 break;
1652 case ICMP_DEST_UNREACHABLE:
1653 if (icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED) {
1654 /* Update DCE and adjust MTU is icmp header if needed */
1655 icmp_inbound_too_big_v4(icmph, ira);
1656 }
1657 /* FALLTHRU */
1658 default:
1659 icmp_inbound_error_fanout_v4(mp, icmph, ira);
1660 break;
1661 }
1662 return (mp_ret);
1663 }
1664
1665 /*
1666 * Send an ICMP echo, timestamp or address mask reply.
1667 * The caller has already updated the payload part of the packet.
1668 * We handle the ICMP checksum, IP source address selection and feed
1669 * the packet into ip_output_simple.
1670 */
1671 static void
1672 icmp_send_reply_v4(mblk_t *mp, ipha_t *ipha, icmph_t *icmph,
1673 ip_recv_attr_t *ira)
1674 {
1675 uint_t ip_hdr_length = ira->ira_ip_hdr_length;
1676 ill_t *ill = ira->ira_ill;
1677 ip_stack_t *ipst = ill->ill_ipst;
1678 ip_xmit_attr_t ixas;
1679
1680 /* Send out an ICMP packet */
1681 icmph->icmph_checksum = 0;
1682 icmph->icmph_checksum = IP_CSUM(mp, ip_hdr_length, 0);
1683 /* Reset time to live. */
1684 ipha->ipha_ttl = ipst->ips_ip_def_ttl;
1685 {
1686 /* Swap source and destination addresses */
1687 ipaddr_t tmp;
1688
1689 tmp = ipha->ipha_src;
1690 ipha->ipha_src = ipha->ipha_dst;
1691 ipha->ipha_dst = tmp;
1692 }
1693 ipha->ipha_ident = 0;
1694 if (!IS_SIMPLE_IPH(ipha))
1695 icmp_options_update(ipha);
1696
1697 bzero(&ixas, sizeof (ixas));
1698 ixas.ixa_flags = IXAF_BASIC_SIMPLE_V4;
1699 ixas.ixa_zoneid = ira->ira_zoneid;
1700 ixas.ixa_cred = kcred;
1701 ixas.ixa_cpid = NOPID;
1702 ixas.ixa_tsl = ira->ira_tsl; /* Behave as a multi-level responder */
1703 ixas.ixa_ifindex = 0;
1704 ixas.ixa_ipst = ipst;
1705 ixas.ixa_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
1706
1707 if (!(ira->ira_flags & IRAF_IPSEC_SECURE)) {
1708 /*
1709 * This packet should go out the same way as it
1710 * came in i.e in clear, independent of the IPsec policy
1711 * for transmitting packets.
1712 */
1713 ixas.ixa_flags |= IXAF_NO_IPSEC;
1714 } else {
1715 if (!ipsec_in_to_out(ira, &ixas, mp, ipha, NULL)) {
1716 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1717 /* Note: mp already consumed and ip_drop_packet done */
1718 return;
1719 }
1720 }
1721 if (ira->ira_flags & IRAF_MULTIBROADCAST) {
1722 /*
1723 * Not one or our addresses (IRE_LOCALs), thus we let
1724 * ip_output_simple pick the source.
1725 */
1726 ipha->ipha_src = INADDR_ANY;
1727 ixas.ixa_flags |= IXAF_SET_SOURCE;
1728 }
1729 /* Should we send with DF and use dce_pmtu? */
1730 if (ipst->ips_ipv4_icmp_return_pmtu) {
1731 ixas.ixa_flags |= IXAF_PMTU_DISCOVERY;
1732 ipha->ipha_fragment_offset_and_flags |= IPH_DF_HTONS;
1733 }
1734
1735 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutMsgs);
1736
1737 (void) ip_output_simple(mp, &ixas);
1738 ixa_cleanup(&ixas);
1739 }
1740
1741 /*
1742 * Verify the ICMP messages for either for ICMP error or redirect packet.
1743 * The caller should have fully pulled up the message. If it's a redirect
1744 * packet, only basic checks on IP header will be done; otherwise, verify
1745 * the packet by looking at the included ULP header.
1746 *
1747 * Called before icmp_inbound_error_fanout_v4 is called.
1748 */
1749 static boolean_t
1750 icmp_inbound_verify_v4(mblk_t *mp, icmph_t *icmph, ip_recv_attr_t *ira)
1751 {
1752 ill_t *ill = ira->ira_ill;
1753 int hdr_length;
1754 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
1755 conn_t *connp;
1756 ipha_t *ipha; /* Inner IP header */
1757
1758 ipha = (ipha_t *)&icmph[1];
1759 if ((uchar_t *)ipha + IP_SIMPLE_HDR_LENGTH > mp->b_wptr)
1760 goto truncated;
1761
1762 hdr_length = IPH_HDR_LENGTH(ipha);
1763
1764 if ((IPH_HDR_VERSION(ipha) != IPV4_VERSION))
1765 goto discard_pkt;
1766
1767 if (hdr_length < sizeof (ipha_t))
1768 goto truncated;
1769
1770 if ((uchar_t *)ipha + hdr_length > mp->b_wptr)
1771 goto truncated;
1772
1773 /*
1774 * Stop here for ICMP_REDIRECT.
1775 */
1776 if (icmph->icmph_type == ICMP_REDIRECT)
1777 return (B_TRUE);
1778
1779 /*
1780 * ICMP errors only.
1781 */
1782 switch (ipha->ipha_protocol) {
1783 case IPPROTO_UDP:
1784 /*
1785 * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of
1786 * transport header.
1787 */
1788 if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN >
1789 mp->b_wptr)
1790 goto truncated;
1791 break;
1792 case IPPROTO_TCP: {
1793 tcpha_t *tcpha;
1794
1795 /*
1796 * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of
1797 * transport header.
1798 */
1799 if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN >
1800 mp->b_wptr)
1801 goto truncated;
1802
1803 tcpha = (tcpha_t *)((uchar_t *)ipha + hdr_length);
1804 connp = ipcl_tcp_lookup_reversed_ipv4(ipha, tcpha, TCPS_LISTEN,
1805 ipst);
1806 if (connp == NULL)
1807 goto discard_pkt;
1808
1809 if ((connp->conn_verifyicmp != NULL) &&
1810 !connp->conn_verifyicmp(connp, tcpha, icmph, NULL, ira)) {
1811 CONN_DEC_REF(connp);
1812 goto discard_pkt;
1813 }
1814 CONN_DEC_REF(connp);
1815 break;
1816 }
1817 case IPPROTO_SCTP:
1818 /*
1819 * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of
1820 * transport header.
1821 */
1822 if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN >
1823 mp->b_wptr)
1824 goto truncated;
1825 break;
1826 case IPPROTO_ESP:
1827 case IPPROTO_AH:
1828 break;
1829 case IPPROTO_ENCAP:
1830 if ((uchar_t *)ipha + hdr_length + sizeof (ipha_t) >
1831 mp->b_wptr)
1832 goto truncated;
1833 break;
1834 default:
1835 break;
1836 }
1837
1838 return (B_TRUE);
1839
1840 discard_pkt:
1841 /* Bogus ICMP error. */
1842 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1843 return (B_FALSE);
1844
1845 truncated:
1846 /* We pulled up everthing already. Must be truncated */
1847 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
1848 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
1849 return (B_FALSE);
1850 }
1851
1852 /* Table from RFC 1191 */
1853 static int icmp_frag_size_table[] =
1854 { 32000, 17914, 8166, 4352, 2002, 1496, 1006, 508, 296, 68 };
1855
1856 /*
1857 * Process received ICMP Packet too big.
1858 * Just handles the DCE create/update, including using the above table of
1859 * PMTU guesses. The caller is responsible for validating the packet before
1860 * passing it in and also to fanout the ICMP error to any matching transport
1861 * conns. Assumes the message has been fully pulled up and verified.
1862 *
1863 * Before getting here, the caller has called icmp_inbound_verify_v4()
1864 * that should have verified with ULP to prevent undoing the changes we're
1865 * going to make to DCE. For example, TCP might have verified that the packet
1866 * which generated error is in the send window.
1867 *
1868 * In some cases modified this MTU in the ICMP header packet; the caller
1869 * should pass to the matching ULP after this returns.
1870 */
1871 static void
1872 icmp_inbound_too_big_v4(icmph_t *icmph, ip_recv_attr_t *ira)
1873 {
1874 dce_t *dce;
1875 int old_mtu;
1876 int mtu, orig_mtu;
1877 ipaddr_t dst;
1878 boolean_t disable_pmtud;
1879 ill_t *ill = ira->ira_ill;
1880 ip_stack_t *ipst = ill->ill_ipst;
1881 uint_t hdr_length;
1882 ipha_t *ipha;
1883
1884 /* Caller already pulled up everything. */
1885 ipha = (ipha_t *)&icmph[1];
1886 ASSERT(icmph->icmph_type == ICMP_DEST_UNREACHABLE &&
1887 icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED);
1888 ASSERT(ill != NULL);
1889
1890 hdr_length = IPH_HDR_LENGTH(ipha);
1891
1892 /*
1893 * We handle path MTU for source routed packets since the DCE
1894 * is looked up using the final destination.
1895 */
1896 dst = ip_get_dst(ipha);
1897
1898 dce = dce_lookup_and_add_v4(dst, ipst);
1899 if (dce == NULL) {
1900 /* Couldn't add a unique one - ENOMEM */
1901 ip1dbg(("icmp_inbound_too_big_v4: no dce for 0x%x\n",
1902 ntohl(dst)));
1903 return;
1904 }
1905
1906 /* Check for MTU discovery advice as described in RFC 1191 */
1907 mtu = ntohs(icmph->icmph_du_mtu);
1908 orig_mtu = mtu;
1909 disable_pmtud = B_FALSE;
1910
1911 mutex_enter(&dce->dce_lock);
1912 if (dce->dce_flags & DCEF_PMTU)
1913 old_mtu = dce->dce_pmtu;
1914 else
1915 old_mtu = ill->ill_mtu;
1916
1917 if (icmph->icmph_du_zero != 0 || mtu < ipst->ips_ip_pmtu_min) {
1918 uint32_t length;
1919 int i;
1920
1921 /*
1922 * Use the table from RFC 1191 to figure out
1923 * the next "plateau" based on the length in
1924 * the original IP packet.
1925 */
1926 length = ntohs(ipha->ipha_length);
1927 DTRACE_PROBE2(ip4__pmtu__guess, dce_t *, dce,
1928 uint32_t, length);
1929 if (old_mtu <= length &&
1930 old_mtu >= length - hdr_length) {
1931 /*
1932 * Handle broken BSD 4.2 systems that
1933 * return the wrong ipha_length in ICMP
1934 * errors.
1935 */
1936 ip1dbg(("Wrong mtu: sent %d, dce %d\n",
1937 length, old_mtu));
1938 length -= hdr_length;
1939 }
1940 for (i = 0; i < A_CNT(icmp_frag_size_table); i++) {
1941 if (length > icmp_frag_size_table[i])
1942 break;
1943 }
1944 if (i == A_CNT(icmp_frag_size_table)) {
1945 /* Smaller than IP_MIN_MTU! */
1946 ip1dbg(("Too big for packet size %d\n",
1947 length));
1948 disable_pmtud = B_TRUE;
1949 mtu = ipst->ips_ip_pmtu_min;
1950 } else {
1951 mtu = icmp_frag_size_table[i];
1952 ip1dbg(("Calculated mtu %d, packet size %d, "
1953 "before %d\n", mtu, length, old_mtu));
1954 if (mtu < ipst->ips_ip_pmtu_min) {
1955 mtu = ipst->ips_ip_pmtu_min;
1956 disable_pmtud = B_TRUE;
1957 }
1958 }
1959 }
1960 if (disable_pmtud)
1961 dce->dce_flags |= DCEF_TOO_SMALL_PMTU;
1962 else
1963 dce->dce_flags &= ~DCEF_TOO_SMALL_PMTU;
1964
1965 dce->dce_pmtu = MIN(old_mtu, mtu);
1966 /* Prepare to send the new max frag size for the ULP. */
1967 icmph->icmph_du_zero = 0;
1968 icmph->icmph_du_mtu = htons((uint16_t)dce->dce_pmtu);
1969 DTRACE_PROBE4(ip4__pmtu__change, icmph_t *, icmph, dce_t *,
1970 dce, int, orig_mtu, int, mtu);
1971
1972 /* We now have a PMTU for sure */
1973 dce->dce_flags |= DCEF_PMTU;
1974 dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());
1975 mutex_exit(&dce->dce_lock);
1976 /*
1977 * After dropping the lock the new value is visible to everyone.
1978 * Then we bump the generation number so any cached values reinspect
1979 * the dce_t.
1980 */
1981 dce_increment_generation(dce);
1982 dce_refrele(dce);
1983 }
1984
1985 /*
1986 * If the packet in error is Self-Encapsulated, icmp_inbound_error_fanout_v4
1987 * calls this function.
1988 */
1989 static mblk_t *
1990 icmp_inbound_self_encap_error_v4(mblk_t *mp, ipha_t *ipha, ipha_t *in_ipha)
1991 {
1992 int length;
1993
1994 ASSERT(mp->b_datap->db_type == M_DATA);
1995
1996 /* icmp_inbound_v4 has already pulled up the whole error packet */
1997 ASSERT(mp->b_cont == NULL);
1998
1999 /*
2000 * The length that we want to overlay is the inner header
2001 * and what follows it.
2002 */
2003 length = msgdsize(mp) - ((uchar_t *)in_ipha - mp->b_rptr);
2004
2005 /*
2006 * Overlay the inner header and whatever follows it over the
2007 * outer header.
2008 */
2009 bcopy((uchar_t *)in_ipha, (uchar_t *)ipha, length);
2010
2011 /* Adjust for what we removed */
2012 mp->b_wptr -= (uchar_t *)in_ipha - (uchar_t *)ipha;
2013 return (mp);
2014 }
2015
2016 /*
2017 * Try to pass the ICMP message upstream in case the ULP cares.
2018 *
2019 * If the packet that caused the ICMP error is secure, we send
2020 * it to AH/ESP to make sure that the attached packet has a
2021 * valid association. ipha in the code below points to the
2022 * IP header of the packet that caused the error.
2023 *
2024 * For IPsec cases, we let the next-layer-up (which has access to
2025 * cached policy on the conn_t, or can query the SPD directly)
2026 * subtract out any IPsec overhead if they must. We therefore make no
2027 * adjustments here for IPsec overhead.
2028 *
2029 * IFN could have been generated locally or by some router.
2030 *
2031 * LOCAL : ire_send_wire (before calling ipsec_out_process) can call
2032 * icmp_frag_needed/icmp_pkt2big_v6 to generated a local IFN.
2033 * This happens because IP adjusted its value of MTU on an
2034 * earlier IFN message and could not tell the upper layer,
2035 * the new adjusted value of MTU e.g. Packet was encrypted
2036 * or there was not enough information to fanout to upper
2037 * layers. Thus on the next outbound datagram, ire_send_wire
2038 * generates the IFN, where IPsec processing has *not* been
2039 * done.
2040 *
2041 * Note that we retain ixa_fragsize across IPsec thus once
2042 * we have picking ixa_fragsize and entered ipsec_out_process we do
2043 * no change the fragsize even if the path MTU changes before
2044 * we reach ip_output_post_ipsec.
2045 *
2046 * In the local case, IRAF_LOOPBACK will be set indicating
2047 * that IFN was generated locally.
2048 *
2049 * ROUTER : IFN could be secure or non-secure.
2050 *
2051 * * SECURE : We use the IPSEC_IN to fanout to AH/ESP if the
2052 * packet in error has AH/ESP headers to validate the AH/ESP
2053 * headers. AH/ESP will verify whether there is a valid SA or
2054 * not and send it back. We will fanout again if we have more
2055 * data in the packet.
2056 *
2057 * If the packet in error does not have AH/ESP, we handle it
2058 * like any other case.
2059 *
2060 * * NON_SECURE : If the packet in error has AH/ESP headers, we send it
2061 * up to AH/ESP for validation. AH/ESP will verify whether there is a
2062 * valid SA or not and send it back. We will fanout again if
2063 * we have more data in the packet.
2064 *
2065 * If the packet in error does not have AH/ESP, we handle it
2066 * like any other case.
2067 *
2068 * The caller must have called icmp_inbound_verify_v4.
2069 */
2070 static void
2071 icmp_inbound_error_fanout_v4(mblk_t *mp, icmph_t *icmph, ip_recv_attr_t *ira)
2072 {
2073 uint16_t *up; /* Pointer to ports in ULP header */
2074 uint32_t ports; /* reversed ports for fanout */
2075 ipha_t ripha; /* With reversed addresses */
2076 ipha_t *ipha; /* Inner IP header */
2077 uint_t hdr_length; /* Inner IP header length */
2078 tcpha_t *tcpha;
2079 conn_t *connp;
2080 ill_t *ill = ira->ira_ill;
2081 ip_stack_t *ipst = ill->ill_ipst;
2082 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
2083 ill_t *rill = ira->ira_rill;
2084
2085 /* Caller already pulled up everything. */
2086 ipha = (ipha_t *)&icmph[1];
2087 ASSERT((uchar_t *)&ipha[1] <= mp->b_wptr);
2088 ASSERT(mp->b_cont == NULL);
2089
2090 hdr_length = IPH_HDR_LENGTH(ipha);
2091 ira->ira_protocol = ipha->ipha_protocol;
2092
2093 /*
2094 * We need a separate IP header with the source and destination
2095 * addresses reversed to do fanout/classification because the ipha in
2096 * the ICMP error is in the form we sent it out.
2097 */
2098 ripha.ipha_src = ipha->ipha_dst;
2099 ripha.ipha_dst = ipha->ipha_src;
2100 ripha.ipha_protocol = ipha->ipha_protocol;
2101 ripha.ipha_version_and_hdr_length = ipha->ipha_version_and_hdr_length;
2102
2103 ip2dbg(("icmp_inbound_error_v4: proto %d %x to %x: %d/%d\n",
2104 ripha.ipha_protocol, ntohl(ipha->ipha_src),
2105 ntohl(ipha->ipha_dst),
2106 icmph->icmph_type, icmph->icmph_code));
2107
2108 switch (ipha->ipha_protocol) {
2109 case IPPROTO_UDP:
2110 up = (uint16_t *)((uchar_t *)ipha + hdr_length);
2111
2112 /* Attempt to find a client stream based on port. */
2113 ip2dbg(("icmp_inbound_error_v4: UDP ports %d to %d\n",
2114 ntohs(up[0]), ntohs(up[1])));
2115
2116 /* Note that we send error to all matches. */
2117 ira->ira_flags |= IRAF_ICMP_ERROR;
2118 ip_fanout_udp_multi_v4(mp, &ripha, up[0], up[1], ira);
2119 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2120 return;
2121
2122 case IPPROTO_TCP:
2123 /*
2124 * Find a TCP client stream for this packet.
2125 * Note that we do a reverse lookup since the header is
2126 * in the form we sent it out.
2127 */
2128 tcpha = (tcpha_t *)((uchar_t *)ipha + hdr_length);
2129 connp = ipcl_tcp_lookup_reversed_ipv4(ipha, tcpha, TCPS_LISTEN,
2130 ipst);
2131 if (connp == NULL)
2132 goto discard_pkt;
2133
2134 if (CONN_INBOUND_POLICY_PRESENT(connp, ipss) ||
2135 (ira->ira_flags & IRAF_IPSEC_SECURE)) {
2136 mp = ipsec_check_inbound_policy(mp, connp,
2137 ipha, NULL, ira);
2138 if (mp == NULL) {
2139 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
2140 /* Note that mp is NULL */
2141 ip_drop_input("ipIfStatsInDiscards", mp, ill);
2142 CONN_DEC_REF(connp);
2143 return;
2144 }
2145 }
2146
2147 ira->ira_flags |= IRAF_ICMP_ERROR;
2148 ira->ira_ill = ira->ira_rill = NULL;
2149 if (IPCL_IS_TCP(connp)) {
2150 SQUEUE_ENTER_ONE(connp->conn_sqp, mp,
2151 connp->conn_recvicmp, connp, ira, SQ_FILL,
2152 SQTAG_TCP_INPUT_ICMP_ERR);
2153 } else {
2154 /* Not TCP; must be SOCK_RAW, IPPROTO_TCP */
2155 (connp->conn_recv)(connp, mp, NULL, ira);
2156 CONN_DEC_REF(connp);
2157 }
2158 ira->ira_ill = ill;
2159 ira->ira_rill = rill;
2160 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2161 return;
2162
2163 case IPPROTO_SCTP:
2164 up = (uint16_t *)((uchar_t *)ipha + hdr_length);
2165 /* Find a SCTP client stream for this packet. */
2166 ((uint16_t *)&ports)[0] = up[1];
2167 ((uint16_t *)&ports)[1] = up[0];
2168
2169 ira->ira_flags |= IRAF_ICMP_ERROR;
2170 ip_fanout_sctp(mp, &ripha, NULL, ports, ira);
2171 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2172 return;
2173
2174 case IPPROTO_ESP:
2175 case IPPROTO_AH:
2176 if (!ipsec_loaded(ipss)) {
2177 ip_proto_not_sup(mp, ira);
2178 return;
2179 }
2180
2181 if (ipha->ipha_protocol == IPPROTO_ESP)
2182 mp = ipsecesp_icmp_error(mp, ira);
2183 else
2184 mp = ipsecah_icmp_error(mp, ira);
2185 if (mp == NULL)
2186 return;
2187
2188 /* Just in case ipsec didn't preserve the NULL b_cont */
2189 if (mp->b_cont != NULL) {
2190 if (!pullupmsg(mp, -1))
2191 goto discard_pkt;
2192 }
2193
2194 /*
2195 * Note that ira_pktlen and ira_ip_hdr_length are no longer
2196 * correct, but we don't use them any more here.
2197 *
2198 * If succesful, the mp has been modified to not include
2199 * the ESP/AH header so we can fanout to the ULP's icmp
2200 * error handler.
2201 */
2202 if (mp->b_wptr - mp->b_rptr < IP_SIMPLE_HDR_LENGTH)
2203 goto truncated;
2204
2205 /* Verify the modified message before any further processes. */
2206 ipha = (ipha_t *)mp->b_rptr;
2207 hdr_length = IPH_HDR_LENGTH(ipha);
2208 icmph = (icmph_t *)&mp->b_rptr[hdr_length];
2209 if (!icmp_inbound_verify_v4(mp, icmph, ira)) {
2210 freemsg(mp);
2211 return;
2212 }
2213
2214 icmp_inbound_error_fanout_v4(mp, icmph, ira);
2215 return;
2216
2217 case IPPROTO_ENCAP: {
2218 /* Look for self-encapsulated packets that caused an error */
2219 ipha_t *in_ipha;
2220
2221 /*
2222 * Caller has verified that length has to be
2223 * at least the size of IP header.
2224 */
2225 ASSERT(hdr_length >= sizeof (ipha_t));
2226 /*
2227 * Check the sanity of the inner IP header like
2228 * we did for the outer header.
2229 */
2230 in_ipha = (ipha_t *)((uchar_t *)ipha + hdr_length);
2231 if ((IPH_HDR_VERSION(in_ipha) != IPV4_VERSION)) {
2232 goto discard_pkt;
2233 }
2234 if (IPH_HDR_LENGTH(in_ipha) < sizeof (ipha_t)) {
2235 goto discard_pkt;
2236 }
2237 /* Check for Self-encapsulated tunnels */
2238 if (in_ipha->ipha_src == ipha->ipha_src &&
2239 in_ipha->ipha_dst == ipha->ipha_dst) {
2240
2241 mp = icmp_inbound_self_encap_error_v4(mp, ipha,
2242 in_ipha);
2243 if (mp == NULL)
2244 goto discard_pkt;
2245
2246 /*
2247 * Just in case self_encap didn't preserve the NULL
2248 * b_cont
2249 */
2250 if (mp->b_cont != NULL) {
2251 if (!pullupmsg(mp, -1))
2252 goto discard_pkt;
2253 }
2254 /*
2255 * Note that ira_pktlen and ira_ip_hdr_length are no
2256 * longer correct, but we don't use them any more here.
2257 */
2258 if (mp->b_wptr - mp->b_rptr < IP_SIMPLE_HDR_LENGTH)
2259 goto truncated;
2260
2261 /*
2262 * Verify the modified message before any further
2263 * processes.
2264 */
2265 ipha = (ipha_t *)mp->b_rptr;
2266 hdr_length = IPH_HDR_LENGTH(ipha);
2267 icmph = (icmph_t *)&mp->b_rptr[hdr_length];
2268 if (!icmp_inbound_verify_v4(mp, icmph, ira)) {
2269 freemsg(mp);
2270 return;
2271 }
2272
2273 /*
2274 * The packet in error is self-encapsualted.
2275 * And we are finding it further encapsulated
2276 * which we could not have possibly generated.
2277 */
2278 if (ipha->ipha_protocol == IPPROTO_ENCAP) {
2279 goto discard_pkt;
2280 }
2281 icmp_inbound_error_fanout_v4(mp, icmph, ira);
2282 return;
2283 }
2284 /* No self-encapsulated */
2285 /* FALLTHRU */
2286 }
2287 case IPPROTO_IPV6:
2288 if ((connp = ipcl_iptun_classify_v4(&ripha.ipha_src,
2289 &ripha.ipha_dst, ipst)) != NULL) {
2290 ira->ira_flags |= IRAF_ICMP_ERROR;
2291 connp->conn_recvicmp(connp, mp, NULL, ira);
2292 CONN_DEC_REF(connp);
2293 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2294 return;
2295 }
2296 /*
2297 * No IP tunnel is interested, fallthrough and see
2298 * if a raw socket will want it.
2299 */
2300 /* FALLTHRU */
2301 default:
2302 ira->ira_flags |= IRAF_ICMP_ERROR;
2303 ip_fanout_proto_v4(mp, &ripha, ira);
2304 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2305 return;
2306 }
2307 /* NOTREACHED */
2308 discard_pkt:
2309 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
2310 ip1dbg(("icmp_inbound_error_fanout_v4: drop pkt\n"));
2311 ip_drop_input("ipIfStatsInDiscards", mp, ill);
2312 freemsg(mp);
2313 return;
2314
2315 truncated:
2316 /* We pulled up everthing already. Must be truncated */
2317 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
2318 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
2319 freemsg(mp);
2320 }
2321
2322 /*
2323 * Common IP options parser.
2324 *
2325 * Setup routine: fill in *optp with options-parsing state, then
2326 * tail-call ipoptp_next to return the first option.
2327 */
2328 uint8_t
2329 ipoptp_first(ipoptp_t *optp, ipha_t *ipha)
2330 {
2331 uint32_t totallen; /* total length of all options */
2332
2333 totallen = ipha->ipha_version_and_hdr_length -
2334 (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS);
2335 totallen <<= 2;
2336 optp->ipoptp_next = (uint8_t *)(&ipha[1]);
2337 optp->ipoptp_end = optp->ipoptp_next + totallen;
2338 optp->ipoptp_flags = 0;
2339 return (ipoptp_next(optp));
2340 }
2341
2342 /* Like above but without an ipha_t */
2343 uint8_t
2344 ipoptp_first2(ipoptp_t *optp, uint32_t totallen, uint8_t *opt)
2345 {
2346 optp->ipoptp_next = opt;
2347 optp->ipoptp_end = optp->ipoptp_next + totallen;
2348 optp->ipoptp_flags = 0;
2349 return (ipoptp_next(optp));
2350 }
2351
2352 /*
2353 * Common IP options parser: extract next option.
2354 */
2355 uint8_t
2356 ipoptp_next(ipoptp_t *optp)
2357 {
2358 uint8_t *end = optp->ipoptp_end;
2359 uint8_t *cur = optp->ipoptp_next;
2360 uint8_t opt, len, pointer;
2361
2362 /*
2363 * If cur > end already, then the ipoptp_end or ipoptp_next pointer
2364 * has been corrupted.
2365 */
2366 ASSERT(cur <= end);
2367
2368 if (cur == end)
2369 return (IPOPT_EOL);
2370
2371 opt = cur[IPOPT_OPTVAL];
2372
2373 /*
2374 * Skip any NOP options.
2375 */
2376 while (opt == IPOPT_NOP) {
2377 cur++;
2378 if (cur == end)
2379 return (IPOPT_EOL);
2380 opt = cur[IPOPT_OPTVAL];
2381 }
2382
2383 if (opt == IPOPT_EOL)
2384 return (IPOPT_EOL);
2385
2386 /*
2387 * Option requiring a length.
2388 */
2389 if ((cur + 1) >= end) {
2390 optp->ipoptp_flags |= IPOPTP_ERROR;
2391 return (IPOPT_EOL);
2392 }
2393 len = cur[IPOPT_OLEN];
2394 if (len < 2) {
2395 optp->ipoptp_flags |= IPOPTP_ERROR;
2396 return (IPOPT_EOL);
2397 }
2398 optp->ipoptp_cur = cur;
2399 optp->ipoptp_len = len;
2400 optp->ipoptp_next = cur + len;
2401 if (cur + len > end) {
2402 optp->ipoptp_flags |= IPOPTP_ERROR;
2403 return (IPOPT_EOL);
2404 }
2405
2406 /*
2407 * For the options which require a pointer field, make sure
2408 * its there, and make sure it points to either something
2409 * inside this option, or the end of the option.
2410 */
2411 switch (opt) {
2412 case IPOPT_RR:
2413 case IPOPT_TS:
2414 case IPOPT_LSRR:
2415 case IPOPT_SSRR:
2416 if (len <= IPOPT_OFFSET) {
2417 optp->ipoptp_flags |= IPOPTP_ERROR;
2418 return (opt);
2419 }
2420 pointer = cur[IPOPT_OFFSET];
2421 if (pointer - 1 > len) {
2422 optp->ipoptp_flags |= IPOPTP_ERROR;
2423 return (opt);
2424 }
2425 break;
2426 }
2427
2428 /*
2429 * Sanity check the pointer field based on the type of the
2430 * option.
2431 */
2432 switch (opt) {
2433 case IPOPT_RR:
2434 case IPOPT_SSRR:
2435 case IPOPT_LSRR:
2436 if (pointer < IPOPT_MINOFF_SR)
2437 optp->ipoptp_flags |= IPOPTP_ERROR;
2438 break;
2439 case IPOPT_TS:
2440 if (pointer < IPOPT_MINOFF_IT)
2441 optp->ipoptp_flags |= IPOPTP_ERROR;
2442 /*
2443 * Note that the Internet Timestamp option also
2444 * contains two four bit fields (the Overflow field,
2445 * and the Flag field), which follow the pointer
2446 * field. We don't need to check that these fields
2447 * fall within the length of the option because this
2448 * was implicitely done above. We've checked that the
2449 * pointer value is at least IPOPT_MINOFF_IT, and that
2450 * it falls within the option. Since IPOPT_MINOFF_IT >
2451 * IPOPT_POS_OV_FLG, we don't need the explicit check.
2452 */
2453 ASSERT(len > IPOPT_POS_OV_FLG);
2454 break;
2455 }
2456
2457 return (opt);
2458 }
2459
2460 /*
2461 * Use the outgoing IP header to create an IP_OPTIONS option the way
2462 * it was passed down from the application.
2463 *
2464 * This is compatible with BSD in that it returns
2465 * the reverse source route with the final destination
2466 * as the last entry. The first 4 bytes of the option
2467 * will contain the final destination.
2468 */
2469 int
2470 ip_opt_get_user(conn_t *connp, uchar_t *buf)
2471 {
2472 ipoptp_t opts;
2473 uchar_t *opt;
2474 uint8_t optval;
2475 uint8_t optlen;
2476 uint32_t len = 0;
2477 uchar_t *buf1 = buf;
2478 uint32_t totallen;
2479 ipaddr_t dst;
2480 ip_pkt_t *ipp = &connp->conn_xmit_ipp;
2481
2482 if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS))
2483 return (0);
2484
2485 totallen = ipp->ipp_ipv4_options_len;
2486 if (totallen & 0x3)
2487 return (0);
2488
2489 buf += IP_ADDR_LEN; /* Leave room for final destination */
2490 len += IP_ADDR_LEN;
2491 bzero(buf1, IP_ADDR_LEN);
2492
2493 dst = connp->conn_faddr_v4;
2494
2495 for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options);
2496 optval != IPOPT_EOL;
2497 optval = ipoptp_next(&opts)) {
2498 int off;
2499
2500 opt = opts.ipoptp_cur;
2501 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
2502 break;
2503 }
2504 optlen = opts.ipoptp_len;
2505
2506 switch (optval) {
2507 case IPOPT_SSRR:
2508 case IPOPT_LSRR:
2509
2510 /*
2511 * Insert destination as the first entry in the source
2512 * route and move down the entries on step.
2513 * The last entry gets placed at buf1.
2514 */
2515 buf[IPOPT_OPTVAL] = optval;
2516 buf[IPOPT_OLEN] = optlen;
2517 buf[IPOPT_OFFSET] = optlen;
2518
2519 off = optlen - IP_ADDR_LEN;
2520 if (off < 0) {
2521 /* No entries in source route */
2522 break;
2523 }
2524 /* Last entry in source route if not already set */
2525 if (dst == INADDR_ANY)
2526 bcopy(opt + off, buf1, IP_ADDR_LEN);
2527 off -= IP_ADDR_LEN;
2528
2529 while (off > 0) {
2530 bcopy(opt + off,
2531 buf + off + IP_ADDR_LEN,
2532 IP_ADDR_LEN);
2533 off -= IP_ADDR_LEN;
2534 }
2535 /* ipha_dst into first slot */
2536 bcopy(&dst, buf + off + IP_ADDR_LEN,
2537 IP_ADDR_LEN);
2538 buf += optlen;
2539 len += optlen;
2540 break;
2541
2542 default:
2543 bcopy(opt, buf, optlen);
2544 buf += optlen;
2545 len += optlen;
2546 break;
2547 }
2548 }
2549 done:
2550 /* Pad the resulting options */
2551 while (len & 0x3) {
2552 *buf++ = IPOPT_EOL;
2553 len++;
2554 }
2555 return (len);
2556 }
2557
2558 /*
2559 * Update any record route or timestamp options to include this host.
2560 * Reverse any source route option.
2561 * This routine assumes that the options are well formed i.e. that they
2562 * have already been checked.
2563 */
2564 static void
2565 icmp_options_update(ipha_t *ipha)
2566 {
2567 ipoptp_t opts;
2568 uchar_t *opt;
2569 uint8_t optval;
2570 ipaddr_t src; /* Our local address */
2571 ipaddr_t dst;
2572
2573 ip2dbg(("icmp_options_update\n"));
2574 src = ipha->ipha_src;
2575 dst = ipha->ipha_dst;
2576
2577 for (optval = ipoptp_first(&opts, ipha);
2578 optval != IPOPT_EOL;
2579 optval = ipoptp_next(&opts)) {
2580 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
2581 opt = opts.ipoptp_cur;
2582 ip2dbg(("icmp_options_update: opt %d, len %d\n",
2583 optval, opts.ipoptp_len));
2584 switch (optval) {
2585 int off1, off2;
2586 case IPOPT_SSRR:
2587 case IPOPT_LSRR:
2588 /*
2589 * Reverse the source route. The first entry
2590 * should be the next to last one in the current
2591 * source route (the last entry is our address).
2592 * The last entry should be the final destination.
2593 */
2594 off1 = IPOPT_MINOFF_SR - 1;
2595 off2 = opt[IPOPT_OFFSET] - IP_ADDR_LEN - 1;
2596 if (off2 < 0) {
2597 /* No entries in source route */
2598 ip1dbg((
2599 "icmp_options_update: bad src route\n"));
2600 break;
2601 }
2602 bcopy((char *)opt + off2, &dst, IP_ADDR_LEN);
2603 bcopy(&ipha->ipha_dst, (char *)opt + off2, IP_ADDR_LEN);
2604 bcopy(&dst, &ipha->ipha_dst, IP_ADDR_LEN);
2605 off2 -= IP_ADDR_LEN;
2606
2607 while (off1 < off2) {
2608 bcopy((char *)opt + off1, &src, IP_ADDR_LEN);
2609 bcopy((char *)opt + off2, (char *)opt + off1,
2610 IP_ADDR_LEN);
2611 bcopy(&src, (char *)opt + off2, IP_ADDR_LEN);
2612 off1 += IP_ADDR_LEN;
2613 off2 -= IP_ADDR_LEN;
2614 }
2615 opt[IPOPT_OFFSET] = IPOPT_MINOFF_SR;
2616 break;
2617 }
2618 }
2619 }
2620
2621 /*
2622 * Process received ICMP Redirect messages.
2623 * Assumes the caller has verified that the headers are in the pulled up mblk.
2624 * Consumes mp.
2625 */
2626 static void
2627 icmp_redirect_v4(mblk_t *mp, ipha_t *ipha, icmph_t *icmph, ip_recv_attr_t *ira)
2628 {
2629 ire_t *ire, *nire;
2630 ire_t *prev_ire;
2631 ipaddr_t src, dst, gateway;
2632 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
2633 ipha_t *inner_ipha; /* Inner IP header */
2634
2635 /* Caller already pulled up everything. */
2636 inner_ipha = (ipha_t *)&icmph[1];
2637 src = ipha->ipha_src;
2638 dst = inner_ipha->ipha_dst;
2639 gateway = icmph->icmph_rd_gateway;
2640 /* Make sure the new gateway is reachable somehow. */
2641 ire = ire_ftable_lookup_v4(gateway, 0, 0, IRE_ONLINK, NULL,
2642 ALL_ZONES, NULL, MATCH_IRE_TYPE, 0, ipst, NULL);
2643 /*
2644 * Make sure we had a route for the dest in question and that
2645 * that route was pointing to the old gateway (the source of the
2646 * redirect packet.)
2647 * We do longest match and then compare ire_gateway_addr below.
2648 */
2649 prev_ire = ire_ftable_lookup_v4(dst, 0, 0, 0, NULL, ALL_ZONES,
2650 NULL, MATCH_IRE_DSTONLY, 0, ipst, NULL);
2651 /*
2652 * Check that
2653 * the redirect was not from ourselves
2654 * the new gateway and the old gateway are directly reachable
2655 */
2656 if (prev_ire == NULL || ire == NULL ||
2657 (prev_ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) ||
2658 (prev_ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) ||
2659 !(ire->ire_type & IRE_IF_ALL) ||
2660 prev_ire->ire_gateway_addr != src) {
2661 BUMP_MIB(&ipst->ips_icmp_mib, icmpInBadRedirects);
2662 ip_drop_input("icmpInBadRedirects - ire", mp, ira->ira_ill);
2663 freemsg(mp);
2664 if (ire != NULL)
2665 ire_refrele(ire);
2666 if (prev_ire != NULL)
2667 ire_refrele(prev_ire);
2668 return;
2669 }
2670
2671 ire_refrele(prev_ire);
2672 ire_refrele(ire);
2673
2674 /*
2675 * TODO: more precise handling for cases 0, 2, 3, the latter two
2676 * require TOS routing
2677 */
2678 switch (icmph->icmph_code) {
2679 case 0:
2680 case 1:
2681 /* TODO: TOS specificity for cases 2 and 3 */
2682 case 2:
2683 case 3:
2684 break;
2685 default:
2686 BUMP_MIB(&ipst->ips_icmp_mib, icmpInBadRedirects);
2687 ip_drop_input("icmpInBadRedirects - code", mp, ira->ira_ill);
2688 freemsg(mp);
2689 return;
2690 }
2691 /*
2692 * Create a Route Association. This will allow us to remember that
2693 * someone we believe told us to use the particular gateway.
2694 */
2695 ire = ire_create(
2696 (uchar_t *)&dst, /* dest addr */
2697 (uchar_t *)&ip_g_all_ones, /* mask */
2698 (uchar_t *)&gateway, /* gateway addr */
2699 IRE_HOST,
2700 NULL, /* ill */
2701 ALL_ZONES,
2702 (RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST),
2703 NULL, /* tsol_gc_t */
2704 ipst);
2705
2706 if (ire == NULL) {
2707 freemsg(mp);
2708 return;
2709 }
2710 nire = ire_add(ire);
2711 /* Check if it was a duplicate entry */
2712 if (nire != NULL && nire != ire) {
2713 ASSERT(nire->ire_identical_ref > 1);
2714 ire_delete(nire);
2715 ire_refrele(nire);
2716 nire = NULL;
2717 }
2718 ire = nire;
2719 if (ire != NULL) {
2720 ire_refrele(ire); /* Held in ire_add */
2721
2722 /* tell routing sockets that we received a redirect */
2723 ip_rts_change(RTM_REDIRECT, dst, gateway, IP_HOST_MASK, 0, src,
2724 (RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST), 0,
2725 (RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_AUTHOR), ipst);
2726 }
2727
2728 /*
2729 * Delete any existing IRE_HOST type redirect ires for this destination.
2730 * This together with the added IRE has the effect of
2731 * modifying an existing redirect.
2732 */
2733 prev_ire = ire_ftable_lookup_v4(dst, 0, src, IRE_HOST, NULL,
2734 ALL_ZONES, NULL, (MATCH_IRE_GW | MATCH_IRE_TYPE), 0, ipst, NULL);
2735 if (prev_ire != NULL) {
2736 if (prev_ire ->ire_flags & RTF_DYNAMIC)
2737 ire_delete(prev_ire);
2738 ire_refrele(prev_ire);
2739 }
2740
2741 freemsg(mp);
2742 }
2743
2744 /*
2745 * Generate an ICMP parameter problem message.
2746 * When called from ip_output side a minimal ip_recv_attr_t needs to be
2747 * constructed by the caller.
2748 */
2749 static void
2750 icmp_param_problem(mblk_t *mp, uint8_t ptr, ip_recv_attr_t *ira)
2751 {
2752 icmph_t icmph;
2753 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
2754
2755 mp = icmp_pkt_err_ok(mp, ira);
2756 if (mp == NULL)
2757 return;
2758
2759 bzero(&icmph, sizeof (icmph_t));
2760 icmph.icmph_type = ICMP_PARAM_PROBLEM;
2761 icmph.icmph_pp_ptr = ptr;
2762 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutParmProbs);
2763 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
2764 }
2765
2766 /*
2767 * Build and ship an IPv4 ICMP message using the packet data in mp, and
2768 * the ICMP header pointed to by "stuff". (May be called as writer.)
2769 * Note: assumes that icmp_pkt_err_ok has been called to verify that
2770 * an icmp error packet can be sent.
2771 * Assigns an appropriate source address to the packet. If ipha_dst is
2772 * one of our addresses use it for source. Otherwise let ip_output_simple
2773 * pick the source address.
2774 */
2775 static void
2776 icmp_pkt(mblk_t *mp, void *stuff, size_t len, ip_recv_attr_t *ira)
2777 {
2778 ipaddr_t dst;
2779 icmph_t *icmph;
2780 ipha_t *ipha;
2781 uint_t len_needed;
2782 size_t msg_len;
2783 mblk_t *mp1;
2784 ipaddr_t src;
2785 ire_t *ire;
2786 ip_xmit_attr_t ixas;
2787 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
2788
2789 ipha = (ipha_t *)mp->b_rptr;
2790
2791 bzero(&ixas, sizeof (ixas));
2792 ixas.ixa_flags = IXAF_BASIC_SIMPLE_V4;
2793 ixas.ixa_zoneid = ira->ira_zoneid;
2794 ixas.ixa_ifindex = 0;
2795 ixas.ixa_ipst = ipst;
2796 ixas.ixa_cred = kcred;
2797 ixas.ixa_cpid = NOPID;
2798 ixas.ixa_tsl = ira->ira_tsl; /* Behave as a multi-level responder */
2799 ixas.ixa_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
2800
2801 if (ira->ira_flags & IRAF_IPSEC_SECURE) {
2802 /*
2803 * Apply IPsec based on how IPsec was applied to
2804 * the packet that had the error.
2805 *
2806 * If it was an outbound packet that caused the ICMP
2807 * error, then the caller will have setup the IRA
2808 * appropriately.
2809 */
2810 if (!ipsec_in_to_out(ira, &ixas, mp, ipha, NULL)) {
2811 BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsOutDiscards);
2812 /* Note: mp already consumed and ip_drop_packet done */
2813 return;
2814 }
2815 } else {
2816 /*
2817 * This is in clear. The icmp message we are building
2818 * here should go out in clear, independent of our policy.
2819 */
2820 ixas.ixa_flags |= IXAF_NO_IPSEC;
2821 }
2822
2823 /* Remember our eventual destination */
2824 dst = ipha->ipha_src;
2825
2826 /*
2827 * If the packet was for one of our unicast addresses, make
2828 * sure we respond with that as the source. Otherwise
2829 * have ip_output_simple pick the source address.
2830 */
2831 ire = ire_ftable_lookup_v4(ipha->ipha_dst, 0, 0,
2832 (IRE_LOCAL|IRE_LOOPBACK), NULL, ira->ira_zoneid, NULL,
2833 MATCH_IRE_TYPE|MATCH_IRE_ZONEONLY, 0, ipst, NULL);
2834 if (ire != NULL) {
2835 ire_refrele(ire);
2836 src = ipha->ipha_dst;
2837 } else {
2838 src = INADDR_ANY;
2839 ixas.ixa_flags |= IXAF_SET_SOURCE;
2840 }
2841
2842 /*
2843 * Check if we can send back more then 8 bytes in addition to
2844 * the IP header. We try to send 64 bytes of data and the internal
2845 * header in the special cases of ipv4 encapsulated ipv4 or ipv6.
2846 */
2847 len_needed = IPH_HDR_LENGTH(ipha);
2848 if (ipha->ipha_protocol == IPPROTO_ENCAP ||
2849 ipha->ipha_protocol == IPPROTO_IPV6) {
2850 if (!pullupmsg(mp, -1)) {
2851 BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsOutDiscards);
2852 ip_drop_output("ipIfStatsOutDiscards", mp, NULL);
2853 freemsg(mp);
2854 return;
2855 }
2856 ipha = (ipha_t *)mp->b_rptr;
2857
2858 if (ipha->ipha_protocol == IPPROTO_ENCAP) {
2859 len_needed += IPH_HDR_LENGTH(((uchar_t *)ipha +
2860 len_needed));
2861 } else {
2862 ip6_t *ip6h = (ip6_t *)((uchar_t *)ipha + len_needed);
2863
2864 ASSERT(ipha->ipha_protocol == IPPROTO_IPV6);
2865 len_needed += ip_hdr_length_v6(mp, ip6h);
2866 }
2867 }
2868 len_needed += ipst->ips_ip_icmp_return;
2869 msg_len = msgdsize(mp);
2870 if (msg_len > len_needed) {
2871 (void) adjmsg(mp, len_needed - msg_len);
2872 msg_len = len_needed;
2873 }
2874 mp1 = allocb(sizeof (icmp_ipha) + len, BPRI_MED);
2875 if (mp1 == NULL) {
2876 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutErrors);
2877 freemsg(mp);
2878 return;
2879 }
2880 mp1->b_cont = mp;
2881 mp = mp1;
2882
2883 /*
2884 * Set IXAF_TRUSTED_ICMP so we can let the ICMP messages this
2885 * node generates be accepted in peace by all on-host destinations.
2886 * If we do NOT assume that all on-host destinations trust
2887 * self-generated ICMP messages, then rework here, ip6.c, and spd.c.
2888 * (Look for IXAF_TRUSTED_ICMP).
2889 */
2890 ixas.ixa_flags |= IXAF_TRUSTED_ICMP;
2891
2892 ipha = (ipha_t *)mp->b_rptr;
2893 mp1->b_wptr = (uchar_t *)ipha + (sizeof (icmp_ipha) + len);
2894 *ipha = icmp_ipha;
2895 ipha->ipha_src = src;
2896 ipha->ipha_dst = dst;
2897 ipha->ipha_ttl = ipst->ips_ip_def_ttl;
2898 msg_len += sizeof (icmp_ipha) + len;
2899 if (msg_len > IP_MAXPACKET) {
2900 (void) adjmsg(mp, IP_MAXPACKET - msg_len);
2901 msg_len = IP_MAXPACKET;
2902 }
2903 ipha->ipha_length = htons((uint16_t)msg_len);
2904 icmph = (icmph_t *)&ipha[1];
2905 bcopy(stuff, icmph, len);
2906 icmph->icmph_checksum = 0;
2907 icmph->icmph_checksum = IP_CSUM(mp, (int32_t)sizeof (ipha_t), 0);
2908 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutMsgs);
2909
2910 (void) ip_output_simple(mp, &ixas);
2911 ixa_cleanup(&ixas);
2912 }
2913
2914 /*
2915 * Determine if an ICMP error packet can be sent given the rate limit.
2916 * The limit consists of an average frequency (icmp_pkt_err_interval measured
2917 * in milliseconds) and a burst size. Burst size number of packets can
2918 * be sent arbitrarely closely spaced.
2919 * The state is tracked using two variables to implement an approximate
2920 * token bucket filter:
2921 * icmp_pkt_err_last - lbolt value when the last burst started
2922 * icmp_pkt_err_sent - number of packets sent in current burst
2923 */
2924 boolean_t
2925 icmp_err_rate_limit(ip_stack_t *ipst)
2926 {
2927 clock_t now = TICK_TO_MSEC(ddi_get_lbolt());
2928 uint_t refilled; /* Number of packets refilled in tbf since last */
2929 /* Guard against changes by loading into local variable */
2930 uint_t err_interval = ipst->ips_ip_icmp_err_interval;
2931
2932 if (err_interval == 0)
2933 return (B_FALSE);
2934
2935 if (ipst->ips_icmp_pkt_err_last > now) {
2936 /* 100HZ lbolt in ms for 32bit arch wraps every 49.7 days */
2937 ipst->ips_icmp_pkt_err_last = 0;
2938 ipst->ips_icmp_pkt_err_sent = 0;
2939 }
2940 /*
2941 * If we are in a burst update the token bucket filter.
2942 * Update the "last" time to be close to "now" but make sure
2943 * we don't loose precision.
2944 */
2945 if (ipst->ips_icmp_pkt_err_sent != 0) {
2946 refilled = (now - ipst->ips_icmp_pkt_err_last)/err_interval;
2947 if (refilled > ipst->ips_icmp_pkt_err_sent) {
2948 ipst->ips_icmp_pkt_err_sent = 0;
2949 } else {
2950 ipst->ips_icmp_pkt_err_sent -= refilled;
2951 ipst->ips_icmp_pkt_err_last += refilled * err_interval;
2952 }
2953 }
2954 if (ipst->ips_icmp_pkt_err_sent == 0) {
2955 /* Start of new burst */
2956 ipst->ips_icmp_pkt_err_last = now;
2957 }
2958 if (ipst->ips_icmp_pkt_err_sent < ipst->ips_ip_icmp_err_burst) {
2959 ipst->ips_icmp_pkt_err_sent++;
2960 ip1dbg(("icmp_err_rate_limit: %d sent in burst\n",
2961 ipst->ips_icmp_pkt_err_sent));
2962 return (B_FALSE);
2963 }
2964 ip1dbg(("icmp_err_rate_limit: dropped\n"));
2965 return (B_TRUE);
2966 }
2967
2968 /*
2969 * Check if it is ok to send an IPv4 ICMP error packet in
2970 * response to the IPv4 packet in mp.
2971 * Free the message and return null if no
2972 * ICMP error packet should be sent.
2973 */
2974 static mblk_t *
2975 icmp_pkt_err_ok(mblk_t *mp, ip_recv_attr_t *ira)
2976 {
2977 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
2978 icmph_t *icmph;
2979 ipha_t *ipha;
2980 uint_t len_needed;
2981
2982 if (!mp)
2983 return (NULL);
2984 ipha = (ipha_t *)mp->b_rptr;
2985 if (ip_csum_hdr(ipha)) {
2986 BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsInCksumErrs);
2987 ip_drop_input("ipIfStatsInCksumErrs", mp, NULL);
2988 freemsg(mp);
2989 return (NULL);
2990 }
2991 if (ip_type_v4(ipha->ipha_dst, ipst) == IRE_BROADCAST ||
2992 ip_type_v4(ipha->ipha_src, ipst) == IRE_BROADCAST ||
2993 CLASSD(ipha->ipha_dst) ||
2994 CLASSD(ipha->ipha_src) ||
2995 (ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_OFFSET)) {
2996 /* Note: only errors to the fragment with offset 0 */
2997 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
2998 freemsg(mp);
2999 return (NULL);
3000 }
3001 if (ipha->ipha_protocol == IPPROTO_ICMP) {
3002 /*
3003 * Check the ICMP type. RFC 1122 sez: don't send ICMP
3004 * errors in response to any ICMP errors.
3005 */
3006 len_needed = IPH_HDR_LENGTH(ipha) + ICMPH_SIZE;
3007 if (mp->b_wptr - mp->b_rptr < len_needed) {
3008 if (!pullupmsg(mp, len_needed)) {
3009 BUMP_MIB(&ipst->ips_icmp_mib, icmpInErrors);
3010 freemsg(mp);
3011 return (NULL);
3012 }
3013 ipha = (ipha_t *)mp->b_rptr;
3014 }
3015 icmph = (icmph_t *)
3016 (&((char *)ipha)[IPH_HDR_LENGTH(ipha)]);
3017 switch (icmph->icmph_type) {
3018 case ICMP_DEST_UNREACHABLE:
3019 case ICMP_SOURCE_QUENCH:
3020 case ICMP_TIME_EXCEEDED:
3021 case ICMP_PARAM_PROBLEM:
3022 case ICMP_REDIRECT:
3023 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
3024 freemsg(mp);
3025 return (NULL);
3026 default:
3027 break;
3028 }
3029 }
3030 /*
3031 * If this is a labeled system, then check to see if we're allowed to
3032 * send a response to this particular sender. If not, then just drop.
3033 */
3034 if (is_system_labeled() && !tsol_can_reply_error(mp, ira)) {
3035 ip2dbg(("icmp_pkt_err_ok: can't respond to packet\n"));
3036 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
3037 freemsg(mp);
3038 return (NULL);
3039 }
3040 if (icmp_err_rate_limit(ipst)) {
3041 /*
3042 * Only send ICMP error packets every so often.
3043 * This should be done on a per port/source basis,
3044 * but for now this will suffice.
3045 */
3046 freemsg(mp);
3047 return (NULL);
3048 }
3049 return (mp);
3050 }
3051
3052 /*
3053 * Called when a packet was sent out the same link that it arrived on.
3054 * Check if it is ok to send a redirect and then send it.
3055 */
3056 void
3057 ip_send_potential_redirect_v4(mblk_t *mp, ipha_t *ipha, ire_t *ire,
3058 ip_recv_attr_t *ira)
3059 {
3060 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
3061 ipaddr_t src, nhop;
3062 mblk_t *mp1;
3063 ire_t *nhop_ire;
3064
3065 /*
3066 * Check the source address to see if it originated
3067 * on the same logical subnet it is going back out on.
3068 * If so, we should be able to send it a redirect.
3069 * Avoid sending a redirect if the destination
3070 * is directly connected (i.e., we matched an IRE_ONLINK),
3071 * or if the packet was source routed out this interface.
3072 *
3073 * We avoid sending a redirect if the
3074 * destination is directly connected
3075 * because it is possible that multiple
3076 * IP subnets may have been configured on
3077 * the link, and the source may not
3078 * be on the same subnet as ip destination,
3079 * even though they are on the same
3080 * physical link.
3081 */
3082 if ((ire->ire_type & IRE_ONLINK) ||
3083 ip_source_routed(ipha, ipst))
3084 return;
3085
3086 nhop_ire = ire_nexthop(ire);
3087 if (nhop_ire == NULL)
3088 return;
3089
3090 nhop = nhop_ire->ire_addr;
3091
3092 if (nhop_ire->ire_type & IRE_IF_CLONE) {
3093 ire_t *ire2;
3094
3095 /* Follow ire_dep_parent to find non-clone IRE_INTERFACE */
3096 mutex_enter(&nhop_ire->ire_lock);
3097 ire2 = nhop_ire->ire_dep_parent;
3098 if (ire2 != NULL)
3099 ire_refhold(ire2);
3100 mutex_exit(&nhop_ire->ire_lock);
3101 ire_refrele(nhop_ire);
3102 nhop_ire = ire2;
3103 }
3104 if (nhop_ire == NULL)
3105 return;
3106
3107 ASSERT(!(nhop_ire->ire_type & IRE_IF_CLONE));
3108
3109 src = ipha->ipha_src;
3110
3111 /*
3112 * We look at the interface ire for the nexthop,
3113 * to see if ipha_src is in the same subnet
3114 * as the nexthop.
3115 */
3116 if ((src & nhop_ire->ire_mask) == (nhop & nhop_ire->ire_mask)) {
3117 /*
3118 * The source is directly connected.
3119 */
3120 mp1 = copymsg(mp);
3121 if (mp1 != NULL) {
3122 icmp_send_redirect(mp1, nhop, ira);
3123 }
3124 }
3125 ire_refrele(nhop_ire);
3126 }
3127
3128 /*
3129 * Generate an ICMP redirect message.
3130 */
3131 static void
3132 icmp_send_redirect(mblk_t *mp, ipaddr_t gateway, ip_recv_attr_t *ira)
3133 {
3134 icmph_t icmph;
3135 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
3136
3137 mp = icmp_pkt_err_ok(mp, ira);
3138 if (mp == NULL)
3139 return;
3140
3141 bzero(&icmph, sizeof (icmph_t));
3142 icmph.icmph_type = ICMP_REDIRECT;
3143 icmph.icmph_code = 1;
3144 icmph.icmph_rd_gateway = gateway;
3145 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutRedirects);
3146 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
3147 }
3148
3149 /*
3150 * Generate an ICMP time exceeded message.
3151 */
3152 void
3153 icmp_time_exceeded(mblk_t *mp, uint8_t code, ip_recv_attr_t *ira)
3154 {
3155 icmph_t icmph;
3156 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
3157
3158 mp = icmp_pkt_err_ok(mp, ira);
3159 if (mp == NULL)
3160 return;
3161
3162 bzero(&icmph, sizeof (icmph_t));
3163 icmph.icmph_type = ICMP_TIME_EXCEEDED;
3164 icmph.icmph_code = code;
3165 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutTimeExcds);
3166 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
3167 }
3168
3169 /*
3170 * Generate an ICMP unreachable message.
3171 * When called from ip_output side a minimal ip_recv_attr_t needs to be
3172 * constructed by the caller.
3173 */
3174 void
3175 icmp_unreachable(mblk_t *mp, uint8_t code, ip_recv_attr_t *ira)
3176 {
3177 icmph_t icmph;
3178 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
3179
3180 mp = icmp_pkt_err_ok(mp, ira);
3181 if (mp == NULL)
3182 return;
3183
3184 bzero(&icmph, sizeof (icmph_t));
3185 icmph.icmph_type = ICMP_DEST_UNREACHABLE;
3186 icmph.icmph_code = code;
3187 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDestUnreachs);
3188 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
3189 }
3190
3191 /*
3192 * Latch in the IPsec state for a stream based the policy in the listener
3193 * and the actions in the ip_recv_attr_t.
3194 * Called directly from TCP and SCTP.
3195 */
3196 boolean_t
3197 ip_ipsec_policy_inherit(conn_t *connp, conn_t *lconnp, ip_recv_attr_t *ira)
3198 {
3199 ASSERT(lconnp->conn_policy != NULL);
3200 ASSERT(connp->conn_policy == NULL);
3201
3202 IPPH_REFHOLD(lconnp->conn_policy);
3203 connp->conn_policy = lconnp->conn_policy;
3204
3205 if (ira->ira_ipsec_action != NULL) {
3206 if (connp->conn_latch == NULL) {
3207 connp->conn_latch = iplatch_create();
3208 if (connp->conn_latch == NULL)
3209 return (B_FALSE);
3210 }
3211 ipsec_latch_inbound(connp, ira);
3212 }
3213 return (B_TRUE);
3214 }
3215
3216 /*
3217 * Verify whether or not the IP address is a valid local address.
3218 * Could be a unicast, including one for a down interface.
3219 * If allow_mcbc then a multicast or broadcast address is also
3220 * acceptable.
3221 *
3222 * In the case of a broadcast/multicast address, however, the
3223 * upper protocol is expected to reset the src address
3224 * to zero when we return IPVL_MCAST/IPVL_BCAST so that
3225 * no packets are emitted with broadcast/multicast address as
3226 * source address (that violates hosts requirements RFC 1122)
3227 * The addresses valid for bind are:
3228 * (1) - INADDR_ANY (0)
3229 * (2) - IP address of an UP interface
3230 * (3) - IP address of a DOWN interface
3231 * (4) - valid local IP broadcast addresses. In this case
3232 * the conn will only receive packets destined to
3233 * the specified broadcast address.
3234 * (5) - a multicast address. In this case
3235 * the conn will only receive packets destined to
3236 * the specified multicast address. Note: the
3237 * application still has to issue an
3238 * IP_ADD_MEMBERSHIP socket option.
3239 *
3240 * In all the above cases, the bound address must be valid in the current zone.
3241 * When the address is loopback, multicast or broadcast, there might be many
3242 * matching IREs so bind has to look up based on the zone.
3243 */
3244 ip_laddr_t
3245 ip_laddr_verify_v4(ipaddr_t src_addr, zoneid_t zoneid,
3246 ip_stack_t *ipst, boolean_t allow_mcbc)
3247 {
3248 ire_t *src_ire;
3249
3250 ASSERT(src_addr != INADDR_ANY);
3251
3252 src_ire = ire_ftable_lookup_v4(src_addr, 0, 0, 0,
3253 NULL, zoneid, NULL, MATCH_IRE_ZONEONLY, 0, ipst, NULL);
3254
3255 /*
3256 * If an address other than in6addr_any is requested,
3257 * we verify that it is a valid address for bind
3258 * Note: Following code is in if-else-if form for
3259 * readability compared to a condition check.
3260 */
3261 if (src_ire != NULL && (src_ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK))) {
3262 /*
3263 * (2) Bind to address of local UP interface
3264 */
3265 ire_refrele(src_ire);
3266 return (IPVL_UNICAST_UP);
3267 } else if (src_ire != NULL && src_ire->ire_type & IRE_BROADCAST) {
3268 /*
3269 * (4) Bind to broadcast address
3270 */
3271 ire_refrele(src_ire);
3272 if (allow_mcbc)
3273 return (IPVL_BCAST);
3274 else
3275 return (IPVL_BAD);
3276 } else if (CLASSD(src_addr)) {
3277 /* (5) bind to multicast address. */
3278 if (src_ire != NULL)
3279 ire_refrele(src_ire);
3280
3281 if (allow_mcbc)
3282 return (IPVL_MCAST);
3283 else
3284 return (IPVL_BAD);
3285 } else {
3286 ipif_t *ipif;
3287
3288 /*
3289 * (3) Bind to address of local DOWN interface?
3290 * (ipif_lookup_addr() looks up all interfaces
3291 * but we do not get here for UP interfaces
3292 * - case (2) above)
3293 */
3294 if (src_ire != NULL)
3295 ire_refrele(src_ire);
3296
3297 ipif = ipif_lookup_addr(src_addr, NULL, zoneid, ipst);
3298 if (ipif == NULL)
3299 return (IPVL_BAD);
3300
3301 /* Not a useful source? */
3302 if (ipif->ipif_flags & (IPIF_NOLOCAL | IPIF_ANYCAST)) {
3303 ipif_refrele(ipif);
3304 return (IPVL_BAD);
3305 }
3306 ipif_refrele(ipif);
3307 return (IPVL_UNICAST_DOWN);
3308 }
3309 }
3310
3311 /*
3312 * Insert in the bind fanout for IPv4 and IPv6.
3313 * The caller should already have used ip_laddr_verify_v*() before calling
3314 * this.
3315 */
3316 int
3317 ip_laddr_fanout_insert(conn_t *connp)
3318 {
3319 int error;
3320
3321 /*
3322 * Allow setting new policies. For example, disconnects result
3323 * in us being called. As we would have set conn_policy_cached
3324 * to B_TRUE before, we should set it to B_FALSE, so that policy
3325 * can change after the disconnect.
3326 */
3327 connp->conn_policy_cached = B_FALSE;
3328
3329 error = ipcl_bind_insert(connp);
3330 if (error != 0) {
3331 if (connp->conn_anon_port) {
3332 (void) tsol_mlp_anon(crgetzone(connp->conn_cred),
3333 connp->conn_mlp_type, connp->conn_proto,
3334 ntohs(connp->conn_lport), B_FALSE);
3335 }
3336 connp->conn_mlp_type = mlptSingle;
3337 }
3338 return (error);
3339 }
3340
3341 /*
3342 * Verify that both the source and destination addresses are valid. If
3343 * IPDF_VERIFY_DST is not set, then the destination address may be unreachable,
3344 * i.e. have no route to it. Protocols like TCP want to verify destination
3345 * reachability, while tunnels do not.
3346 *
3347 * Determine the route, the interface, and (optionally) the source address
3348 * to use to reach a given destination.
3349 * Note that we allow connect to broadcast and multicast addresses when
3350 * IPDF_ALLOW_MCBC is set.
3351 * first_hop and dst_addr are normally the same, but if source routing
3352 * they will differ; in that case the first_hop is what we'll use for the
3353 * routing lookup but the dce and label checks will be done on dst_addr,
3354 *
3355 * If uinfo is set, then we fill in the best available information
3356 * we have for the destination. This is based on (in priority order) any
3357 * metrics and path MTU stored in a dce_t, route metrics, and finally the
3358 * ill_mtu/ill_mc_mtu.
3359 *
3360 * Tsol note: If we have a source route then dst_addr != firsthop. But we
3361 * always do the label check on dst_addr.
3362 */
3363 int
3364 ip_set_destination_v4(ipaddr_t *src_addrp, ipaddr_t dst_addr, ipaddr_t firsthop,
3365 ip_xmit_attr_t *ixa, iulp_t *uinfo, uint32_t flags, uint_t mac_mode)
3366 {
3367 ire_t *ire = NULL;
3368 int error = 0;
3369 ipaddr_t setsrc; /* RTF_SETSRC */
3370 zoneid_t zoneid = ixa->ixa_zoneid; /* Honors SO_ALLZONES */
3371 ip_stack_t *ipst = ixa->ixa_ipst;
3372 dce_t *dce;
3373 uint_t pmtu;
3374 uint_t generation;
3375 nce_t *nce;
3376 ill_t *ill = NULL;
3377 boolean_t multirt = B_FALSE;
3378
3379 ASSERT(ixa->ixa_flags & IXAF_IS_IPV4);
3380
3381 /*
3382 * We never send to zero; the ULPs map it to the loopback address.
3383 * We can't allow it since we use zero to mean unitialized in some
3384 * places.
3385 */
3386 ASSERT(dst_addr != INADDR_ANY);
3387
3388 if (is_system_labeled()) {
3389 ts_label_t *tsl = NULL;
3390
3391 error = tsol_check_dest(ixa->ixa_tsl, &dst_addr, IPV4_VERSION,
3392 mac_mode, (flags & IPDF_ZONE_IS_GLOBAL) != 0, &tsl);
3393 if (error != 0)
3394 return (error);
3395 if (tsl != NULL) {
3396 /* Update the label */
3397 ip_xmit_attr_replace_tsl(ixa, tsl);
3398 }
3399 }
3400
3401 setsrc = INADDR_ANY;
3402 /*
3403 * Select a route; For IPMP interfaces, we would only select
3404 * a "hidden" route (i.e., going through a specific under_ill)
3405 * if ixa_ifindex has been specified.
3406 */
3407 ire = ip_select_route_v4(firsthop, *src_addrp, ixa,
3408 &generation, &setsrc, &error, &multirt);
3409 ASSERT(ire != NULL); /* IRE_NOROUTE if none found */
3410 if (error != 0)
3411 goto bad_addr;
3412
3413 /*
3414 * ire can't be a broadcast or multicast unless IPDF_ALLOW_MCBC is set.
3415 * If IPDF_VERIFY_DST is set, the destination must be reachable;
3416 * Otherwise the destination needn't be reachable.
3417 *
3418 * If we match on a reject or black hole, then we've got a
3419 * local failure. May as well fail out the connect() attempt,
3420 * since it's never going to succeed.
3421 */
3422 if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
3423 /*
3424 * If we're verifying destination reachability, we always want
3425 * to complain here.
3426 *
3427 * If we're not verifying destination reachability but the
3428 * destination has a route, we still want to fail on the
3429 * temporary address and broadcast address tests.
3430 *
3431 * In both cases do we let the code continue so some reasonable
3432 * information is returned to the caller. That enables the
3433 * caller to use (and even cache) the IRE. conn_ip_ouput will
3434 * use the generation mismatch path to check for the unreachable
3435 * case thereby avoiding any specific check in the main path.
3436 */
3437 ASSERT(generation == IRE_GENERATION_VERIFY);
3438 if (flags & IPDF_VERIFY_DST) {
3439 /*
3440 * Set errno but continue to set up ixa_ire to be
3441 * the RTF_REJECT|RTF_BLACKHOLE IRE.
3442 * That allows callers to use ip_output to get an
3443 * ICMP error back.
3444 */
3445 if (!(ire->ire_type & IRE_HOST))
3446 error = ENETUNREACH;
3447 else
3448 error = EHOSTUNREACH;
3449 }
3450 }
3451
3452 if ((ire->ire_type & (IRE_BROADCAST|IRE_MULTICAST)) &&
3453 !(flags & IPDF_ALLOW_MCBC)) {
3454 ire_refrele(ire);
3455 ire = ire_reject(ipst, B_FALSE);
3456 generation = IRE_GENERATION_VERIFY;
3457 error = ENETUNREACH;
3458 }
3459
3460 /* Cache things */
3461 if (ixa->ixa_ire != NULL)
3462 ire_refrele_notr(ixa->ixa_ire);
3463 #ifdef DEBUG
3464 ire_refhold_notr(ire);
3465 ire_refrele(ire);
3466 #endif
3467 ixa->ixa_ire = ire;
3468 ixa->ixa_ire_generation = generation;
3469
3470 /*
3471 * Ensure that ixa_dce is always set any time that ixa_ire is set,
3472 * since some callers will send a packet to conn_ip_output() even if
3473 * there's an error.
3474 */
3475 if (flags & IPDF_UNIQUE_DCE) {
3476 /* Fallback to the default dce if allocation fails */
3477 dce = dce_lookup_and_add_v4(dst_addr, ipst);
3478 if (dce != NULL)
3479 generation = dce->dce_generation;
3480 else
3481 dce = dce_lookup_v4(dst_addr, ipst, &generation);
3482 } else {
3483 dce = dce_lookup_v4(dst_addr, ipst, &generation);
3484 }
3485 ASSERT(dce != NULL);
3486 if (ixa->ixa_dce != NULL)
3487 dce_refrele_notr(ixa->ixa_dce);
3488 #ifdef DEBUG
3489 dce_refhold_notr(dce);
3490 dce_refrele(dce);
3491 #endif
3492 ixa->ixa_dce = dce;
3493 ixa->ixa_dce_generation = generation;
3494
3495 /*
3496 * For multicast with multirt we have a flag passed back from
3497 * ire_lookup_multi_ill_v4 since we don't have an IRE for each
3498 * possible multicast address.
3499 * We also need a flag for multicast since we can't check
3500 * whether RTF_MULTIRT is set in ixa_ire for multicast.
3501 */
3502 if (multirt) {
3503 ixa->ixa_postfragfn = ip_postfrag_multirt_v4;
3504 ixa->ixa_flags |= IXAF_MULTIRT_MULTICAST;
3505 } else {
3506 ixa->ixa_postfragfn = ire->ire_postfragfn;
3507 ixa->ixa_flags &= ~IXAF_MULTIRT_MULTICAST;
3508 }
3509 if (!(ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))) {
3510 /* Get an nce to cache. */
3511 nce = ire_to_nce(ire, firsthop, NULL);
3512 if (nce == NULL) {
3513 /* Allocation failure? */
3514 ixa->ixa_ire_generation = IRE_GENERATION_VERIFY;
3515 } else {
3516 if (ixa->ixa_nce != NULL)
3517 nce_refrele(ixa->ixa_nce);
3518 ixa->ixa_nce = nce;
3519 }
3520 }
3521
3522 /*
3523 * If the source address is a loopback address, the
3524 * destination had best be local or multicast.
3525 * If we are sending to an IRE_LOCAL using a loopback source then
3526 * it had better be the same zoneid.
3527 */
3528 if (*src_addrp == htonl(INADDR_LOOPBACK)) {
3529 if ((ire->ire_type & IRE_LOCAL) && ire->ire_zoneid != zoneid) {
3530 ire = NULL; /* Stored in ixa_ire */
3531 error = EADDRNOTAVAIL;
3532 goto bad_addr;
3533 }
3534 if (!(ire->ire_type & (IRE_LOOPBACK|IRE_LOCAL|IRE_MULTICAST))) {
3535 ire = NULL; /* Stored in ixa_ire */
3536 error = EADDRNOTAVAIL;
3537 goto bad_addr;
3538 }
3539 }
3540 if (ire->ire_type & IRE_BROADCAST) {
3541 /*
3542 * If the ULP didn't have a specified source, then we
3543 * make sure we reselect the source when sending
3544 * broadcasts out different interfaces.
3545 */
3546 if (flags & IPDF_SELECT_SRC)
3547 ixa->ixa_flags |= IXAF_SET_SOURCE;
3548 else
3549 ixa->ixa_flags &= ~IXAF_SET_SOURCE;
3550 }
3551
3552 /*
3553 * Does the caller want us to pick a source address?
3554 */
3555 if (flags & IPDF_SELECT_SRC) {
3556 ipaddr_t src_addr;
3557
3558 /*
3559 * We use use ire_nexthop_ill to avoid the under ipmp
3560 * interface for source address selection. Note that for ipmp
3561 * probe packets, ixa_ifindex would have been specified, and
3562 * the ip_select_route() invocation would have picked an ire
3563 * will ire_ill pointing at an under interface.
3564 */
3565 ill = ire_nexthop_ill(ire);
3566
3567 /* If unreachable we have no ill but need some source */
3568 if (ill == NULL) {
3569 src_addr = htonl(INADDR_LOOPBACK);
3570 /* Make sure we look for a better source address */
3571 generation = SRC_GENERATION_VERIFY;
3572 } else {
3573 error = ip_select_source_v4(ill, setsrc, dst_addr,
3574 ixa->ixa_multicast_ifaddr, zoneid,
3575 ipst, &src_addr, &generation, NULL);
3576 if (error != 0) {
3577 ire = NULL; /* Stored in ixa_ire */
3578 goto bad_addr;
3579 }
3580 }
3581
3582 /*
3583 * We allow the source address to to down.
3584 * However, we check that we don't use the loopback address
3585 * as a source when sending out on the wire.
3586 */
3587 if ((src_addr == htonl(INADDR_LOOPBACK)) &&
3588 !(ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK|IRE_MULTICAST)) &&
3589 !(ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))) {
3590 ire = NULL; /* Stored in ixa_ire */
3591 error = EADDRNOTAVAIL;
3592 goto bad_addr;
3593 }
3594
3595 *src_addrp = src_addr;
3596 ixa->ixa_src_generation = generation;
3597 }
3598
3599 /*
3600 * Make sure we don't leave an unreachable ixa_nce in place
3601 * since ip_select_route is used when we unplumb i.e., remove
3602 * references on ixa_ire, ixa_nce, and ixa_dce.
3603 */
3604 nce = ixa->ixa_nce;
3605 if (nce != NULL && nce->nce_is_condemned) {
3606 nce_refrele(nce);
3607 ixa->ixa_nce = NULL;
3608 ixa->ixa_ire_generation = IRE_GENERATION_VERIFY;
3609 }
3610
3611 /*
3612 * The caller has set IXAF_PMTU_DISCOVERY if path MTU is desired.
3613 * However, we can't do it for IPv4 multicast or broadcast.
3614 */
3615 if (ire->ire_type & (IRE_BROADCAST|IRE_MULTICAST))
3616 ixa->ixa_flags &= ~IXAF_PMTU_DISCOVERY;
3617
3618 /*
3619 * Set initial value for fragmentation limit. Either conn_ip_output
3620 * or ULP might updates it when there are routing changes.
3621 * Handles a NULL ixa_ire->ire_ill or a NULL ixa_nce for RTF_REJECT.
3622 */
3623 pmtu = ip_get_pmtu(ixa);
3624 ixa->ixa_fragsize = pmtu;
3625 /* Make sure ixa_fragsize and ixa_pmtu remain identical */
3626 if (ixa->ixa_flags & IXAF_VERIFY_PMTU)
3627 ixa->ixa_pmtu = pmtu;
3628
3629 /*
3630 * Extract information useful for some transports.
3631 * First we look for DCE metrics. Then we take what we have in
3632 * the metrics in the route, where the offlink is used if we have
3633 * one.
3634 */
3635 if (uinfo != NULL) {
3636 bzero(uinfo, sizeof (*uinfo));
3637
3638 if (dce->dce_flags & DCEF_UINFO)
3639 *uinfo = dce->dce_uinfo;
3640
3641 rts_merge_metrics(uinfo, &ire->ire_metrics);
3642
3643 /* Allow ire_metrics to decrease the path MTU from above */
3644 if (uinfo->iulp_mtu == 0 || uinfo->iulp_mtu > pmtu)
3645 uinfo->iulp_mtu = pmtu;
3646
3647 uinfo->iulp_localnet = (ire->ire_type & IRE_ONLINK) != 0;
3648 uinfo->iulp_loopback = (ire->ire_type & IRE_LOOPBACK) != 0;
3649 uinfo->iulp_local = (ire->ire_type & IRE_LOCAL) != 0;
3650 }
3651
3652 if (ill != NULL)
3653 ill_refrele(ill);
3654
3655 return (error);
3656
3657 bad_addr:
3658 if (ire != NULL)
3659 ire_refrele(ire);
3660
3661 if (ill != NULL)
3662 ill_refrele(ill);
3663
3664 /*
3665 * Make sure we don't leave an unreachable ixa_nce in place
3666 * since ip_select_route is used when we unplumb i.e., remove
3667 * references on ixa_ire, ixa_nce, and ixa_dce.
3668 */
3669 nce = ixa->ixa_nce;
3670 if (nce != NULL && nce->nce_is_condemned) {
3671 nce_refrele(nce);
3672 ixa->ixa_nce = NULL;
3673 ixa->ixa_ire_generation = IRE_GENERATION_VERIFY;
3674 }
3675
3676 return (error);
3677 }
3678
3679
3680 /*
3681 * Get the base MTU for the case when path MTU discovery is not used.
3682 * Takes the MTU of the IRE into account.
3683 */
3684 uint_t
3685 ip_get_base_mtu(ill_t *ill, ire_t *ire)
3686 {
3687 uint_t mtu;
3688 uint_t iremtu = ire->ire_metrics.iulp_mtu;
3689
3690 if (ire->ire_type & (IRE_MULTICAST|IRE_BROADCAST))
3691 mtu = ill->ill_mc_mtu;
3692 else
3693 mtu = ill->ill_mtu;
3694
3695 if (iremtu != 0 && iremtu < mtu)
3696 mtu = iremtu;
3697
3698 return (mtu);
3699 }
3700
3701 /*
3702 * Get the PMTU for the attributes. Handles both IPv4 and IPv6.
3703 * Assumes that ixa_ire, dce, and nce have already been set up.
3704 *
3705 * The caller has set IXAF_PMTU_DISCOVERY if path MTU discovery is desired.
3706 * We avoid path MTU discovery if it is disabled with ndd.
3707 * Furtermore, if the path MTU is too small, then we don't set DF for IPv4.
3708 *
3709 * NOTE: We also used to turn it off for source routed packets. That
3710 * is no longer required since the dce is per final destination.
3711 */
3712 uint_t
3713 ip_get_pmtu(ip_xmit_attr_t *ixa)
3714 {
3715 ip_stack_t *ipst = ixa->ixa_ipst;
3716 dce_t *dce;
3717 nce_t *nce;
3718 ire_t *ire;
3719 uint_t pmtu;
3720
3721 ire = ixa->ixa_ire;
3722 dce = ixa->ixa_dce;
3723 nce = ixa->ixa_nce;
3724
3725 /*
3726 * If path MTU discovery has been turned off by ndd, then we ignore
3727 * any dce_pmtu and for IPv4 we will not set DF.
3728 */
3729 if (!ipst->ips_ip_path_mtu_discovery)
3730 ixa->ixa_flags &= ~IXAF_PMTU_DISCOVERY;
3731
3732 pmtu = IP_MAXPACKET;
3733 /*
3734 * Decide whether whether IPv4 sets DF
3735 * For IPv6 "no DF" means to use the 1280 mtu
3736 */
3737 if (ixa->ixa_flags & IXAF_PMTU_DISCOVERY) {
3738 ixa->ixa_flags |= IXAF_PMTU_IPV4_DF;
3739 } else {
3740 ixa->ixa_flags &= ~IXAF_PMTU_IPV4_DF;
3741 if (!(ixa->ixa_flags & IXAF_IS_IPV4))
3742 pmtu = IPV6_MIN_MTU;
3743 }
3744
3745 /* Check if the PMTU is to old before we use it */
3746 if ((dce->dce_flags & DCEF_PMTU) &&
3747 TICK_TO_SEC(ddi_get_lbolt64()) - dce->dce_last_change_time >
3748 ipst->ips_ip_pathmtu_interval) {
3749 /*
3750 * Older than 20 minutes. Drop the path MTU information.
3751 */
3752 mutex_enter(&dce->dce_lock);
3753 dce->dce_flags &= ~(DCEF_PMTU|DCEF_TOO_SMALL_PMTU);
3754 dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());
3755 mutex_exit(&dce->dce_lock);
3756 dce_increment_generation(dce);
3757 }
3758
3759 /* The metrics on the route can lower the path MTU */
3760 if (ire->ire_metrics.iulp_mtu != 0 &&
3761 ire->ire_metrics.iulp_mtu < pmtu)
3762 pmtu = ire->ire_metrics.iulp_mtu;
3763
3764 /*
3765 * If the path MTU is smaller than some minimum, we still use dce_pmtu
3766 * above (would be 576 for IPv4 and 1280 for IPv6), but we clear
3767 * IXAF_PMTU_IPV4_DF so that we avoid setting DF for IPv4.
3768 */
3769 if (ixa->ixa_flags & IXAF_PMTU_DISCOVERY) {
3770 if (dce->dce_flags & DCEF_PMTU) {
3771 if (dce->dce_pmtu < pmtu)
3772 pmtu = dce->dce_pmtu;
3773
3774 if (dce->dce_flags & DCEF_TOO_SMALL_PMTU) {
3775 ixa->ixa_flags |= IXAF_PMTU_TOO_SMALL;
3776 ixa->ixa_flags &= ~IXAF_PMTU_IPV4_DF;
3777 } else {
3778 ixa->ixa_flags &= ~IXAF_PMTU_TOO_SMALL;
3779 ixa->ixa_flags |= IXAF_PMTU_IPV4_DF;
3780 }
3781 } else {
3782 ixa->ixa_flags &= ~IXAF_PMTU_TOO_SMALL;
3783 ixa->ixa_flags |= IXAF_PMTU_IPV4_DF;
3784 }
3785 }
3786
3787 /*
3788 * If we have an IRE_LOCAL we use the loopback mtu instead of
3789 * the ill for going out the wire i.e., IRE_LOCAL gets the same
3790 * mtu as IRE_LOOPBACK.
3791 */
3792 if (ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) {
3793 uint_t loopback_mtu;
3794
3795 loopback_mtu = (ire->ire_ipversion == IPV6_VERSION) ?
3796 ip_loopback_mtu_v6plus : ip_loopback_mtuplus;
3797
3798 if (loopback_mtu < pmtu)
3799 pmtu = loopback_mtu;
3800 } else if (nce != NULL) {
3801 /*
3802 * Make sure we don't exceed the interface MTU.
3803 * In the case of RTF_REJECT or RTF_BLACKHOLE we might not have
3804 * an ill. We'd use the above IP_MAXPACKET in that case just
3805 * to tell the transport something larger than zero.
3806 */
3807 if (ire->ire_type & (IRE_MULTICAST|IRE_BROADCAST)) {
3808 if (nce->nce_common->ncec_ill->ill_mc_mtu < pmtu)
3809 pmtu = nce->nce_common->ncec_ill->ill_mc_mtu;
3810 if (nce->nce_common->ncec_ill != nce->nce_ill &&
3811 nce->nce_ill->ill_mc_mtu < pmtu) {
3812 /*
3813 * for interfaces in an IPMP group, the mtu of
3814 * the nce_ill (under_ill) could be different
3815 * from the mtu of the ncec_ill, so we take the
3816 * min of the two.
3817 */
3818 pmtu = nce->nce_ill->ill_mc_mtu;
3819 }
3820 } else {
3821 if (nce->nce_common->ncec_ill->ill_mtu < pmtu)
3822 pmtu = nce->nce_common->ncec_ill->ill_mtu;
3823 if (nce->nce_common->ncec_ill != nce->nce_ill &&
3824 nce->nce_ill->ill_mtu < pmtu) {
3825 /*
3826 * for interfaces in an IPMP group, the mtu of
3827 * the nce_ill (under_ill) could be different
3828 * from the mtu of the ncec_ill, so we take the
3829 * min of the two.
3830 */
3831 pmtu = nce->nce_ill->ill_mtu;
3832 }
3833 }
3834 }
3835
3836 /*
3837 * Handle the IPV6_USE_MIN_MTU socket option or ancillary data.
3838 * Only applies to IPv6.
3839 */
3840 if (!(ixa->ixa_flags & IXAF_IS_IPV4)) {
3841 if (ixa->ixa_flags & IXAF_USE_MIN_MTU) {
3842 switch (ixa->ixa_use_min_mtu) {
3843 case IPV6_USE_MIN_MTU_MULTICAST:
3844 if (ire->ire_type & IRE_MULTICAST)
3845 pmtu = IPV6_MIN_MTU;
3846 break;
3847 case IPV6_USE_MIN_MTU_ALWAYS:
3848 pmtu = IPV6_MIN_MTU;
3849 break;
3850 case IPV6_USE_MIN_MTU_NEVER:
3851 break;
3852 }
3853 } else {
3854 /* Default is IPV6_USE_MIN_MTU_MULTICAST */
3855 if (ire->ire_type & IRE_MULTICAST)
3856 pmtu = IPV6_MIN_MTU;
3857 }
3858 }
3859
3860 /*
3861 * After receiving an ICMPv6 "packet too big" message with a
3862 * MTU < 1280, and for multirouted IPv6 packets, the IP layer
3863 * will insert a 8-byte fragment header in every packet. We compensate
3864 * for those cases by returning a smaller path MTU to the ULP.
3865 *
3866 * In the case of CGTP then ip_output will add a fragment header.
3867 * Make sure there is room for it by telling a smaller number
3868 * to the transport.
3869 *
3870 * When IXAF_IPV6_ADDR_FRAGHDR we subtract the frag hdr here
3871 * so the ULPs consistently see a iulp_pmtu and ip_get_pmtu()
3872 * which is the size of the packets it can send.
3873 */
3874 if (!(ixa->ixa_flags & IXAF_IS_IPV4)) {
3875 if ((dce->dce_flags & DCEF_TOO_SMALL_PMTU) ||
3876 (ire->ire_flags & RTF_MULTIRT) ||
3877 (ixa->ixa_flags & IXAF_MULTIRT_MULTICAST)) {
3878 pmtu -= sizeof (ip6_frag_t);
3879 ixa->ixa_flags |= IXAF_IPV6_ADD_FRAGHDR;
3880 }
3881 }
3882
3883 return (pmtu);
3884 }
3885
3886 /*
3887 * Carve "len" bytes out of an mblk chain, consuming any we empty, and duping
3888 * the final piece where we don't. Return a pointer to the first mblk in the
3889 * result, and update the pointer to the next mblk to chew on. If anything
3890 * goes wrong (i.e., dupb fails), we waste everything in sight and return a
3891 * NULL pointer.
3892 */
3893 mblk_t *
3894 ip_carve_mp(mblk_t **mpp, ssize_t len)
3895 {
3896 mblk_t *mp0;
3897 mblk_t *mp1;
3898 mblk_t *mp2;
3899
3900 if (!len || !mpp || !(mp0 = *mpp))
3901 return (NULL);
3902 /* If we aren't going to consume the first mblk, we need a dup. */
3903 if (mp0->b_wptr - mp0->b_rptr > len) {
3904 mp1 = dupb(mp0);
3905 if (mp1) {
3906 /* Partition the data between the two mblks. */
3907 mp1->b_wptr = mp1->b_rptr + len;
3908 mp0->b_rptr = mp1->b_wptr;
3909 /*
3910 * after adjustments if mblk not consumed is now
3911 * unaligned, try to align it. If this fails free
3912 * all messages and let upper layer recover.
3913 */
3914 if (!OK_32PTR(mp0->b_rptr)) {
3915 if (!pullupmsg(mp0, -1)) {
3916 freemsg(mp0);
3917 freemsg(mp1);
3918 *mpp = NULL;
3919 return (NULL);
3920 }
3921 }
3922 }
3923 return (mp1);
3924 }
3925 /* Eat through as many mblks as we need to get len bytes. */
3926 len -= mp0->b_wptr - mp0->b_rptr;
3927 for (mp2 = mp1 = mp0; (mp2 = mp2->b_cont) != 0 && len; mp1 = mp2) {
3928 if (mp2->b_wptr - mp2->b_rptr > len) {
3929 /*
3930 * We won't consume the entire last mblk. Like
3931 * above, dup and partition it.
3932 */
3933 mp1->b_cont = dupb(mp2);
3934 mp1 = mp1->b_cont;
3935 if (!mp1) {
3936 /*
3937 * Trouble. Rather than go to a lot of
3938 * trouble to clean up, we free the messages.
3939 * This won't be any worse than losing it on
3940 * the wire.
3941 */
3942 freemsg(mp0);
3943 freemsg(mp2);
3944 *mpp = NULL;
3945 return (NULL);
3946 }
3947 mp1->b_wptr = mp1->b_rptr + len;
3948 mp2->b_rptr = mp1->b_wptr;
3949 /*
3950 * after adjustments if mblk not consumed is now
3951 * unaligned, try to align it. If this fails free
3952 * all messages and let upper layer recover.
3953 */
3954 if (!OK_32PTR(mp2->b_rptr)) {
3955 if (!pullupmsg(mp2, -1)) {
3956 freemsg(mp0);
3957 freemsg(mp2);
3958 *mpp = NULL;
3959 return (NULL);
3960 }
3961 }
3962 *mpp = mp2;
3963 return (mp0);
3964 }
3965 /* Decrement len by the amount we just got. */
3966 len -= mp2->b_wptr - mp2->b_rptr;
3967 }
3968 /*
3969 * len should be reduced to zero now. If not our caller has
3970 * screwed up.
3971 */
3972 if (len) {
3973 /* Shouldn't happen! */
3974 freemsg(mp0);
3975 *mpp = NULL;
3976 return (NULL);
3977 }
3978 /*
3979 * We consumed up to exactly the end of an mblk. Detach the part
3980 * we are returning from the rest of the chain.
3981 */
3982 mp1->b_cont = NULL;
3983 *mpp = mp2;
3984 return (mp0);
3985 }
3986
3987 /* The ill stream is being unplumbed. Called from ip_close */
3988 int
3989 ip_modclose(ill_t *ill)
3990 {
3991 boolean_t success;
3992 ipsq_t *ipsq;
3993 ipif_t *ipif;
3994 queue_t *q = ill->ill_rq;
3995 ip_stack_t *ipst = ill->ill_ipst;
3996 int i;
3997 arl_ill_common_t *ai = ill->ill_common;
3998
3999 /*
4000 * The punlink prior to this may have initiated a capability
4001 * negotiation. But ipsq_enter will block until that finishes or
4002 * times out.
4003 */
4004 success = ipsq_enter(ill, B_FALSE, NEW_OP);
4005
4006 /*
4007 * Open/close/push/pop is guaranteed to be single threaded
4008 * per stream by STREAMS. FS guarantees that all references
4009 * from top are gone before close is called. So there can't
4010 * be another close thread that has set CONDEMNED on this ill.
4011 * and cause ipsq_enter to return failure.
4012 */
4013 ASSERT(success);
4014 ipsq = ill->ill_phyint->phyint_ipsq;
4015
4016 /*
4017 * Mark it condemned. No new reference will be made to this ill.
4018 * Lookup functions will return an error. Threads that try to
4019 * increment the refcnt must check for ILL_CAN_LOOKUP. This ensures
4020 * that the refcnt will drop down to zero.
4021 */
4022 mutex_enter(&ill->ill_lock);
4023 ill->ill_state_flags |= ILL_CONDEMNED;
4024 for (ipif = ill->ill_ipif; ipif != NULL;
4025 ipif = ipif->ipif_next) {
4026 ipif->ipif_state_flags |= IPIF_CONDEMNED;
4027 }
4028 /*
4029 * Wake up anybody waiting to enter the ipsq. ipsq_enter
4030 * returns error if ILL_CONDEMNED is set
4031 */
4032 cv_broadcast(&ill->ill_cv);
4033 mutex_exit(&ill->ill_lock);
4034
4035 /*
4036 * Send all the deferred DLPI messages downstream which came in
4037 * during the small window right before ipsq_enter(). We do this
4038 * without waiting for the ACKs because all the ACKs for M_PROTO
4039 * messages are ignored in ip_rput() when ILL_CONDEMNED is set.
4040 */
4041 ill_dlpi_send_deferred(ill);
4042
4043 /*
4044 * Shut down fragmentation reassembly.
4045 * ill_frag_timer won't start a timer again.
4046 * Now cancel any existing timer
4047 */
4048 (void) untimeout(ill->ill_frag_timer_id);
4049 (void) ill_frag_timeout(ill, 0);
4050
4051 /*
4052 * Call ill_delete to bring down the ipifs, ilms and ill on
4053 * this ill. Then wait for the refcnts to drop to zero.
4054 * ill_is_freeable checks whether the ill is really quiescent.
4055 * Then make sure that threads that are waiting to enter the
4056 * ipsq have seen the error returned by ipsq_enter and have
4057 * gone away. Then we call ill_delete_tail which does the
4058 * DL_UNBIND_REQ with the driver and then qprocsoff.
4059 */
4060 ill_delete(ill);
4061 mutex_enter(&ill->ill_lock);
4062 while (!ill_is_freeable(ill))
4063 cv_wait(&ill->ill_cv, &ill->ill_lock);
4064
4065 while (ill->ill_waiters)
4066 cv_wait(&ill->ill_cv, &ill->ill_lock);
4067
4068 mutex_exit(&ill->ill_lock);
4069
4070 /*
4071 * ill_delete_tail drops reference on ill_ipst, but we need to keep
4072 * it held until the end of the function since the cleanup
4073 * below needs to be able to use the ip_stack_t.
4074 */
4075 netstack_hold(ipst->ips_netstack);
4076
4077 /* qprocsoff is done via ill_delete_tail */
4078 ill_delete_tail(ill);
4079 /*
4080 * synchronously wait for arp stream to unbind. After this, we
4081 * cannot get any data packets up from the driver.
4082 */
4083 arp_unbind_complete(ill);
4084 ASSERT(ill->ill_ipst == NULL);
4085
4086 /*
4087 * Walk through all conns and qenable those that have queued data.
4088 * Close synchronization needs this to
4089 * be done to ensure that all upper layers blocked
4090 * due to flow control to the closing device
4091 * get unblocked.
4092 */
4093 ip1dbg(("ip_wsrv: walking\n"));
4094 for (i = 0; i < TX_FANOUT_SIZE; i++) {
4095 conn_walk_drain(ipst, &ipst->ips_idl_tx_list[i]);
4096 }
4097
4098 /*
4099 * ai can be null if this is an IPv6 ill, or if the IPv4
4100 * stream is being torn down before ARP was plumbed (e.g.,
4101 * /sbin/ifconfig plumbing a stream twice, and encountering
4102 * an error
4103 */
4104 if (ai != NULL) {
4105 ASSERT(!ill->ill_isv6);
4106 mutex_enter(&ai->ai_lock);
4107 ai->ai_ill = NULL;
4108 if (ai->ai_arl == NULL) {
4109 mutex_destroy(&ai->ai_lock);
4110 kmem_free(ai, sizeof (*ai));
4111 } else {
4112 cv_signal(&ai->ai_ill_unplumb_done);
4113 mutex_exit(&ai->ai_lock);
4114 }
4115 }
4116
4117 mutex_enter(&ipst->ips_ip_mi_lock);
4118 mi_close_unlink(&ipst->ips_ip_g_head, (IDP)ill);
4119 mutex_exit(&ipst->ips_ip_mi_lock);
4120
4121 /*
4122 * credp could be null if the open didn't succeed and ip_modopen
4123 * itself calls ip_close.
4124 */
4125 if (ill->ill_credp != NULL)
4126 crfree(ill->ill_credp);
4127
4128 mutex_destroy(&ill->ill_saved_ire_lock);
4129 mutex_destroy(&ill->ill_lock);
4130 rw_destroy(&ill->ill_mcast_lock);
4131 mutex_destroy(&ill->ill_mcast_serializer);
4132 list_destroy(&ill->ill_nce);
4133
4134 /*
4135 * Now we are done with the module close pieces that
4136 * need the netstack_t.
4137 */
4138 netstack_rele(ipst->ips_netstack);
4139
4140 mi_close_free((IDP)ill);
4141 q->q_ptr = WR(q)->q_ptr = NULL;
4142
4143 ipsq_exit(ipsq);
4144
4145 return (0);
4146 }
4147
4148 /*
4149 * This is called as part of close() for IP, UDP, ICMP, and RTS
4150 * in order to quiesce the conn.
4151 */
4152 void
4153 ip_quiesce_conn(conn_t *connp)
4154 {
4155 boolean_t drain_cleanup_reqd = B_FALSE;
4156 boolean_t conn_ioctl_cleanup_reqd = B_FALSE;
4157 boolean_t ilg_cleanup_reqd = B_FALSE;
4158 ip_stack_t *ipst;
4159
4160 ASSERT(!IPCL_IS_TCP(connp));
4161 ipst = connp->conn_netstack->netstack_ip;
4162
4163 /*
4164 * Mark the conn as closing, and this conn must not be
4165 * inserted in future into any list. Eg. conn_drain_insert(),
4166 * won't insert this conn into the conn_drain_list.
4167 *
4168 * conn_idl, and conn_ilg cannot get set henceforth.
4169 */
4170 mutex_enter(&connp->conn_lock);
4171 ASSERT(!(connp->conn_state_flags & CONN_QUIESCED));
4172 connp->conn_state_flags |= CONN_CLOSING;
4173 if (connp->conn_idl != NULL)
4174 drain_cleanup_reqd = B_TRUE;
4175 if (connp->conn_oper_pending_ill != NULL)
4176 conn_ioctl_cleanup_reqd = B_TRUE;
4177 if (connp->conn_dhcpinit_ill != NULL) {
4178 ASSERT(connp->conn_dhcpinit_ill->ill_dhcpinit != 0);
4179 atomic_dec_32(&connp->conn_dhcpinit_ill->ill_dhcpinit);
4180 ill_set_inputfn(connp->conn_dhcpinit_ill);
4181 connp->conn_dhcpinit_ill = NULL;
4182 }
4183 if (connp->conn_ilg != NULL)
4184 ilg_cleanup_reqd = B_TRUE;
4185 mutex_exit(&connp->conn_lock);
4186
4187 if (conn_ioctl_cleanup_reqd)
4188 conn_ioctl_cleanup(connp);
4189
4190 if (is_system_labeled() && connp->conn_anon_port) {
4191 (void) tsol_mlp_anon(crgetzone(connp->conn_cred),
4192 connp->conn_mlp_type, connp->conn_proto,
4193 ntohs(connp->conn_lport), B_FALSE);
4194 connp->conn_anon_port = 0;
4195 }
4196 connp->conn_mlp_type = mlptSingle;
4197
4198 /*
4199 * Remove this conn from any fanout list it is on.
4200 * and then wait for any threads currently operating
4201 * on this endpoint to finish
4202 */
4203 ipcl_hash_remove(connp);
4204
4205 /*
4206 * Remove this conn from the drain list, and do any other cleanup that
4207 * may be required. (TCP conns are never flow controlled, and
4208 * conn_idl will be NULL.)
4209 */
4210 if (drain_cleanup_reqd && connp->conn_idl != NULL) {
4211 idl_t *idl = connp->conn_idl;
4212
4213 mutex_enter(&idl->idl_lock);
4214 conn_drain(connp, B_TRUE);
4215 mutex_exit(&idl->idl_lock);
4216 }
4217
4218 if (connp == ipst->ips_ip_g_mrouter)
4219 (void) ip_mrouter_done(ipst);
4220
4221 if (ilg_cleanup_reqd)
4222 ilg_delete_all(connp);
4223
4224 /*
4225 * Now conn refcnt can increase only thru CONN_INC_REF_LOCKED.
4226 * callers from write side can't be there now because close
4227 * is in progress. The only other caller is ipcl_walk
4228 * which checks for the condemned flag.
4229 */
4230 mutex_enter(&connp->conn_lock);
4231 connp->conn_state_flags |= CONN_CONDEMNED;
4232 while (connp->conn_ref != 1)
4233 cv_wait(&connp->conn_cv, &connp->conn_lock);
4234 connp->conn_state_flags |= CONN_QUIESCED;
4235 mutex_exit(&connp->conn_lock);
4236 }
4237
4238 /* ARGSUSED */
4239 int
4240 ip_close(queue_t *q, int flags)
4241 {
4242 conn_t *connp;
4243
4244 /*
4245 * Call the appropriate delete routine depending on whether this is
4246 * a module or device.
4247 */
4248 if (WR(q)->q_next != NULL) {
4249 /* This is a module close */
4250 return (ip_modclose((ill_t *)q->q_ptr));
4251 }
4252
4253 connp = q->q_ptr;
4254 ip_quiesce_conn(connp);
4255
4256 qprocsoff(q);
4257
4258 /*
4259 * Now we are truly single threaded on this stream, and can
4260 * delete the things hanging off the connp, and finally the connp.
4261 * We removed this connp from the fanout list, it cannot be
4262 * accessed thru the fanouts, and we already waited for the
4263 * conn_ref to drop to 0. We are already in close, so
4264 * there cannot be any other thread from the top. qprocsoff
4265 * has completed, and service has completed or won't run in
4266 * future.
4267 */
4268 ASSERT(connp->conn_ref == 1);
4269
4270 inet_minor_free(connp->conn_minor_arena, connp->conn_dev);
4271
4272 connp->conn_ref--;
4273 ipcl_conn_destroy(connp);
4274
4275 q->q_ptr = WR(q)->q_ptr = NULL;
4276 return (0);
4277 }
4278
4279 /*
4280 * Wapper around putnext() so that ip_rts_request can merely use
4281 * conn_recv.
4282 */
4283 /*ARGSUSED2*/
4284 static void
4285 ip_conn_input(void *arg1, mblk_t *mp, void *arg2, ip_recv_attr_t *ira)
4286 {
4287 conn_t *connp = (conn_t *)arg1;
4288
4289 putnext(connp->conn_rq, mp);
4290 }
4291
4292 /* Dummy in case ICMP error delivery is attempted to a /dev/ip instance */
4293 /* ARGSUSED */
4294 static void
4295 ip_conn_input_icmp(void *arg1, mblk_t *mp, void *arg2, ip_recv_attr_t *ira)
4296 {
4297 freemsg(mp);
4298 }
4299
4300 /*
4301 * Called when the module is about to be unloaded
4302 */
4303 void
4304 ip_ddi_destroy(void)
4305 {
4306 /* This needs to be called before destroying any transports. */
4307 mutex_enter(&cpu_lock);
4308 unregister_cpu_setup_func(ip_tp_cpu_update, NULL);
4309 mutex_exit(&cpu_lock);
4310
4311 tnet_fini();
4312
4313 icmp_ddi_g_destroy();
4314 rts_ddi_g_destroy();
4315 udp_ddi_g_destroy();
4316 sctp_ddi_g_destroy();
4317 tcp_ddi_g_destroy();
4318 ilb_ddi_g_destroy();
4319 dce_g_destroy();
4320 ipsec_policy_g_destroy();
4321 ipcl_g_destroy();
4322 ip_net_g_destroy();
4323 ip_ire_g_fini();
4324 inet_minor_destroy(ip_minor_arena_sa);
4325 #if defined(_LP64)
4326 inet_minor_destroy(ip_minor_arena_la);
4327 #endif
4328
4329 #ifdef DEBUG
4330 list_destroy(&ip_thread_list);
4331 rw_destroy(&ip_thread_rwlock);
4332 tsd_destroy(&ip_thread_data);
4333 #endif
4334
4335 netstack_unregister(NS_IP);
4336 }
4337
4338 /*
4339 * First step in cleanup.
4340 */
4341 /* ARGSUSED */
4342 static void
4343 ip_stack_shutdown(netstackid_t stackid, void *arg)
4344 {
4345 ip_stack_t *ipst = (ip_stack_t *)arg;
4346 kt_did_t ktid;
4347
4348 #ifdef NS_DEBUG
4349 printf("ip_stack_shutdown(%p, stack %d)\n", (void *)ipst, stackid);
4350 #endif
4351
4352 /*
4353 * Perform cleanup for special interfaces (loopback and IPMP).
4354 */
4355 ip_interface_cleanup(ipst);
4356
4357 /*
4358 * The *_hook_shutdown()s start the process of notifying any
4359 * consumers that things are going away.... nothing is destroyed.
4360 */
4361 ipv4_hook_shutdown(ipst);
4362 ipv6_hook_shutdown(ipst);
4363 arp_hook_shutdown(ipst);
4364
4365 mutex_enter(&ipst->ips_capab_taskq_lock);
4366 ktid = ipst->ips_capab_taskq_thread->t_did;
4367 ipst->ips_capab_taskq_quit = B_TRUE;
4368 cv_signal(&ipst->ips_capab_taskq_cv);
4369 mutex_exit(&ipst->ips_capab_taskq_lock);
4370
4371 /*
4372 * In rare occurrences, particularly on virtual hardware where CPUs can
4373 * be de-scheduled, the thread that we just signaled will not run until
4374 * after we have gotten through parts of ip_stack_fini. If that happens
4375 * then we'll try to grab the ips_capab_taskq_lock as part of returning
4376 * from cv_wait which no longer exists.
4377 */
4378 thread_join(ktid);
4379 }
4380
4381 /*
4382 * Free the IP stack instance.
4383 */
4384 static void
4385 ip_stack_fini(netstackid_t stackid, void *arg)
4386 {
4387 ip_stack_t *ipst = (ip_stack_t *)arg;
4388 int ret;
4389
4390 #ifdef NS_DEBUG
4391 printf("ip_stack_fini(%p, stack %d)\n", (void *)ipst, stackid);
4392 #endif
4393 /*
4394 * At this point, all of the notifications that the events and
4395 * protocols are going away have been run, meaning that we can
4396 * now set about starting to clean things up.
4397 */
4398 ipobs_fini(ipst);
4399 ipv4_hook_destroy(ipst);
4400 ipv6_hook_destroy(ipst);
4401 arp_hook_destroy(ipst);
4402 ip_net_destroy(ipst);
4403
4404 ipmp_destroy(ipst);
4405
4406 ip_kstat_fini(stackid, ipst->ips_ip_mibkp);
4407 ipst->ips_ip_mibkp = NULL;
4408 icmp_kstat_fini(stackid, ipst->ips_icmp_mibkp);
4409 ipst->ips_icmp_mibkp = NULL;
4410 ip_kstat2_fini(stackid, ipst->ips_ip_kstat);
4411 ipst->ips_ip_kstat = NULL;
4412 bzero(&ipst->ips_ip_statistics, sizeof (ipst->ips_ip_statistics));
4413 ip6_kstat_fini(stackid, ipst->ips_ip6_kstat);
4414 ipst->ips_ip6_kstat = NULL;
4415 bzero(&ipst->ips_ip6_statistics, sizeof (ipst->ips_ip6_statistics));
4416
4417 kmem_free(ipst->ips_propinfo_tbl,
4418 ip_propinfo_count * sizeof (mod_prop_info_t));
4419 ipst->ips_propinfo_tbl = NULL;
4420
4421 dce_stack_destroy(ipst);
4422 ip_mrouter_stack_destroy(ipst);
4423
4424 /*
4425 * Quiesce all of our timers. Note we set the quiesce flags before we
4426 * call untimeout. The slowtimers may actually kick off another instance
4427 * of the non-slow timers.
4428 */
4429 mutex_enter(&ipst->ips_igmp_timer_lock);
4430 ipst->ips_igmp_timer_quiesce = B_TRUE;
4431 mutex_exit(&ipst->ips_igmp_timer_lock);
4432
4433 mutex_enter(&ipst->ips_mld_timer_lock);
4434 ipst->ips_mld_timer_quiesce = B_TRUE;
4435 mutex_exit(&ipst->ips_mld_timer_lock);
4436
4437 mutex_enter(&ipst->ips_igmp_slowtimeout_lock);
4438 ipst->ips_igmp_slowtimeout_quiesce = B_TRUE;
4439 mutex_exit(&ipst->ips_igmp_slowtimeout_lock);
4440
4441 mutex_enter(&ipst->ips_mld_slowtimeout_lock);
4442 ipst->ips_mld_slowtimeout_quiesce = B_TRUE;
4443 mutex_exit(&ipst->ips_mld_slowtimeout_lock);
4444
4445 ret = untimeout(ipst->ips_igmp_timeout_id);
4446 if (ret == -1) {
4447 ASSERT(ipst->ips_igmp_timeout_id == 0);
4448 } else {
4449 ASSERT(ipst->ips_igmp_timeout_id != 0);
4450 ipst->ips_igmp_timeout_id = 0;
4451 }
4452 ret = untimeout(ipst->ips_igmp_slowtimeout_id);
4453 if (ret == -1) {
4454 ASSERT(ipst->ips_igmp_slowtimeout_id == 0);
4455 } else {
4456 ASSERT(ipst->ips_igmp_slowtimeout_id != 0);
4457 ipst->ips_igmp_slowtimeout_id = 0;
4458 }
4459 ret = untimeout(ipst->ips_mld_timeout_id);
4460 if (ret == -1) {
4461 ASSERT(ipst->ips_mld_timeout_id == 0);
4462 } else {
4463 ASSERT(ipst->ips_mld_timeout_id != 0);
4464 ipst->ips_mld_timeout_id = 0;
4465 }
4466 ret = untimeout(ipst->ips_mld_slowtimeout_id);
4467 if (ret == -1) {
4468 ASSERT(ipst->ips_mld_slowtimeout_id == 0);
4469 } else {
4470 ASSERT(ipst->ips_mld_slowtimeout_id != 0);
4471 ipst->ips_mld_slowtimeout_id = 0;
4472 }
4473
4474 ip_ire_fini(ipst);
4475 ip6_asp_free(ipst);
4476 conn_drain_fini(ipst);
4477 ipcl_destroy(ipst);
4478
4479 mutex_destroy(&ipst->ips_ndp4->ndp_g_lock);
4480 mutex_destroy(&ipst->ips_ndp6->ndp_g_lock);
4481 kmem_free(ipst->ips_ndp4, sizeof (ndp_g_t));
4482 ipst->ips_ndp4 = NULL;
4483 kmem_free(ipst->ips_ndp6, sizeof (ndp_g_t));
4484 ipst->ips_ndp6 = NULL;
4485
4486 if (ipst->ips_loopback_ksp != NULL) {
4487 kstat_delete_netstack(ipst->ips_loopback_ksp, stackid);
4488 ipst->ips_loopback_ksp = NULL;
4489 }
4490
4491 mutex_destroy(&ipst->ips_capab_taskq_lock);
4492 cv_destroy(&ipst->ips_capab_taskq_cv);
4493
4494 rw_destroy(&ipst->ips_srcid_lock);
4495
4496 mutex_destroy(&ipst->ips_ip_mi_lock);
4497 rw_destroy(&ipst->ips_ill_g_usesrc_lock);
4498
4499 mutex_destroy(&ipst->ips_igmp_timer_lock);
4500 mutex_destroy(&ipst->ips_mld_timer_lock);
4501 mutex_destroy(&ipst->ips_igmp_slowtimeout_lock);
4502 mutex_destroy(&ipst->ips_mld_slowtimeout_lock);
4503 mutex_destroy(&ipst->ips_ip_addr_avail_lock);
4504 rw_destroy(&ipst->ips_ill_g_lock);
4505
4506 kmem_free(ipst->ips_phyint_g_list, sizeof (phyint_list_t));
4507 ipst->ips_phyint_g_list = NULL;
4508 kmem_free(ipst->ips_ill_g_heads, sizeof (ill_g_head_t) * MAX_G_HEADS);
4509 ipst->ips_ill_g_heads = NULL;
4510
4511 ldi_ident_release(ipst->ips_ldi_ident);
4512 kmem_free(ipst, sizeof (*ipst));
4513 }
4514
4515 /*
4516 * This function is called from the TSD destructor, and is used to debug
4517 * reference count issues in IP. See block comment in <inet/ip_if.h> for
4518 * details.
4519 */
4520 static void
4521 ip_thread_exit(void *phash)
4522 {
4523 th_hash_t *thh = phash;
4524
4525 rw_enter(&ip_thread_rwlock, RW_WRITER);
4526 list_remove(&ip_thread_list, thh);
4527 rw_exit(&ip_thread_rwlock);
4528 mod_hash_destroy_hash(thh->thh_hash);
4529 kmem_free(thh, sizeof (*thh));
4530 }
4531
4532 /*
4533 * Called when the IP kernel module is loaded into the kernel
4534 */
4535 void
4536 ip_ddi_init(void)
4537 {
4538 ip_squeue_flag = ip_squeue_switch(ip_squeue_enter);
4539
4540 /*
4541 * For IP and TCP the minor numbers should start from 2 since we have 4
4542 * initial devices: ip, ip6, tcp, tcp6.
4543 */
4544 /*
4545 * If this is a 64-bit kernel, then create two separate arenas -
4546 * one for TLIs in the range of INET_MIN_DEV+2 through 2^^18-1, and the
4547 * other for socket apps in the range 2^^18 through 2^^32-1.
4548 */
4549 ip_minor_arena_la = NULL;
4550 ip_minor_arena_sa = NULL;
4551 #if defined(_LP64)
4552 if ((ip_minor_arena_sa = inet_minor_create("ip_minor_arena_sa",
4553 INET_MIN_DEV + 2, MAXMIN32, KM_SLEEP)) == NULL) {
4554 cmn_err(CE_PANIC,
4555 "ip_ddi_init: ip_minor_arena_sa creation failed\n");
4556 }
4557 if ((ip_minor_arena_la = inet_minor_create("ip_minor_arena_la",
4558 MAXMIN32 + 1, MAXMIN64, KM_SLEEP)) == NULL) {
4559 cmn_err(CE_PANIC,
4560 "ip_ddi_init: ip_minor_arena_la creation failed\n");
4561 }
4562 #else
4563 if ((ip_minor_arena_sa = inet_minor_create("ip_minor_arena_sa",
4564 INET_MIN_DEV + 2, MAXMIN, KM_SLEEP)) == NULL) {
4565 cmn_err(CE_PANIC,
4566 "ip_ddi_init: ip_minor_arena_sa creation failed\n");
4567 }
4568 #endif
4569 ip_poll_normal_ticks = MSEC_TO_TICK_ROUNDUP(ip_poll_normal_ms);
4570
4571 ipcl_g_init();
4572 ip_ire_g_init();
4573 ip_net_g_init();
4574
4575 #ifdef DEBUG
4576 tsd_create(&ip_thread_data, ip_thread_exit);
4577 rw_init(&ip_thread_rwlock, NULL, RW_DEFAULT, NULL);
4578 list_create(&ip_thread_list, sizeof (th_hash_t),
4579 offsetof(th_hash_t, thh_link));
4580 #endif
4581 ipsec_policy_g_init();
4582 tcp_ddi_g_init();
4583 sctp_ddi_g_init();
4584 dce_g_init();
4585
4586 /*
4587 * We want to be informed each time a stack is created or
4588 * destroyed in the kernel, so we can maintain the
4589 * set of udp_stack_t's.
4590 */
4591 netstack_register(NS_IP, ip_stack_init, ip_stack_shutdown,
4592 ip_stack_fini);
4593
4594 tnet_init();
4595
4596 udp_ddi_g_init();
4597 rts_ddi_g_init();
4598 icmp_ddi_g_init();
4599 ilb_ddi_g_init();
4600
4601 /* This needs to be called after all transports are initialized. */
4602 mutex_enter(&cpu_lock);
4603 register_cpu_setup_func(ip_tp_cpu_update, NULL);
4604 mutex_exit(&cpu_lock);
4605 }
4606
4607 /*
4608 * Initialize the IP stack instance.
4609 */
4610 static void *
4611 ip_stack_init(netstackid_t stackid, netstack_t *ns)
4612 {
4613 ip_stack_t *ipst;
4614 size_t arrsz;
4615 major_t major;
4616
4617 #ifdef NS_DEBUG
4618 printf("ip_stack_init(stack %d)\n", stackid);
4619 #endif
4620
4621 ipst = (ip_stack_t *)kmem_zalloc(sizeof (*ipst), KM_SLEEP);
4622 ipst->ips_netstack = ns;
4623
4624 ipst->ips_ill_g_heads = kmem_zalloc(sizeof (ill_g_head_t) * MAX_G_HEADS,
4625 KM_SLEEP);
4626 ipst->ips_phyint_g_list = kmem_zalloc(sizeof (phyint_list_t),
4627 KM_SLEEP);
4628 ipst->ips_ndp4 = kmem_zalloc(sizeof (ndp_g_t), KM_SLEEP);
4629 ipst->ips_ndp6 = kmem_zalloc(sizeof (ndp_g_t), KM_SLEEP);
4630 mutex_init(&ipst->ips_ndp4->ndp_g_lock, NULL, MUTEX_DEFAULT, NULL);
4631 mutex_init(&ipst->ips_ndp6->ndp_g_lock, NULL, MUTEX_DEFAULT, NULL);
4632
4633 mutex_init(&ipst->ips_igmp_timer_lock, NULL, MUTEX_DEFAULT, NULL);
4634 ipst->ips_igmp_deferred_next = INFINITY;
4635 mutex_init(&ipst->ips_mld_timer_lock, NULL, MUTEX_DEFAULT, NULL);
4636 ipst->ips_mld_deferred_next = INFINITY;
4637 mutex_init(&ipst->ips_igmp_slowtimeout_lock, NULL, MUTEX_DEFAULT, NULL);
4638 mutex_init(&ipst->ips_mld_slowtimeout_lock, NULL, MUTEX_DEFAULT, NULL);
4639 mutex_init(&ipst->ips_ip_mi_lock, NULL, MUTEX_DEFAULT, NULL);
4640 mutex_init(&ipst->ips_ip_addr_avail_lock, NULL, MUTEX_DEFAULT, NULL);
4641 rw_init(&ipst->ips_ill_g_lock, NULL, RW_DEFAULT, NULL);
4642 rw_init(&ipst->ips_ill_g_usesrc_lock, NULL, RW_DEFAULT, NULL);
4643
4644 ipcl_init(ipst);
4645 ip_ire_init(ipst);
4646 ip6_asp_init(ipst);
4647 ipif_init(ipst);
4648 conn_drain_init(ipst);
4649 ip_mrouter_stack_init(ipst);
4650 dce_stack_init(ipst);
4651
4652 ipst->ips_ip_multirt_log_interval = 1000;
4653
4654 ipst->ips_ill_index = 1;
4655
4656 ipst->ips_saved_ip_forwarding = -1;
4657 ipst->ips_reg_vif_num = ALL_VIFS; /* Index to Register vif */
4658
4659 arrsz = ip_propinfo_count * sizeof (mod_prop_info_t);
4660 ipst->ips_propinfo_tbl = (mod_prop_info_t *)kmem_alloc(arrsz, KM_SLEEP);
4661 bcopy(ip_propinfo_tbl, ipst->ips_propinfo_tbl, arrsz);
4662
4663 ipst->ips_ip_mibkp = ip_kstat_init(stackid, ipst);
4664 ipst->ips_icmp_mibkp = icmp_kstat_init(stackid);
4665 ipst->ips_ip_kstat = ip_kstat2_init(stackid, &ipst->ips_ip_statistics);
4666 ipst->ips_ip6_kstat =
4667 ip6_kstat_init(stackid, &ipst->ips_ip6_statistics);
4668
4669 ipst->ips_ip_src_id = 1;
4670 rw_init(&ipst->ips_srcid_lock, NULL, RW_DEFAULT, NULL);
4671
4672 ipst->ips_src_generation = SRC_GENERATION_INITIAL;
4673
4674 ip_net_init(ipst, ns);
4675 ipv4_hook_init(ipst);
4676 ipv6_hook_init(ipst);
4677 arp_hook_init(ipst);
4678 ipmp_init(ipst);
4679 ipobs_init(ipst);
4680
4681 /*
4682 * Create the taskq dispatcher thread and initialize related stuff.
4683 */
4684 mutex_init(&ipst->ips_capab_taskq_lock, NULL, MUTEX_DEFAULT, NULL);
4685 cv_init(&ipst->ips_capab_taskq_cv, NULL, CV_DEFAULT, NULL);
4686 ipst->ips_capab_taskq_thread = thread_create(NULL, 0,
4687 ill_taskq_dispatch, ipst, 0, &p0, TS_RUN, minclsyspri);
4688
4689 major = mod_name_to_major(INET_NAME);
4690 (void) ldi_ident_from_major(major, &ipst->ips_ldi_ident);
4691 return (ipst);
4692 }
4693
4694 /*
4695 * Allocate and initialize a DLPI template of the specified length. (May be
4696 * called as writer.)
4697 */
4698 mblk_t *
4699 ip_dlpi_alloc(size_t len, t_uscalar_t prim)
4700 {
4701 mblk_t *mp;
4702
4703 mp = allocb(len, BPRI_MED);
4704 if (!mp)
4705 return (NULL);
4706
4707 /*
4708 * DLPIv2 says that DL_INFO_REQ and DL_TOKEN_REQ (the latter
4709 * of which we don't seem to use) are sent with M_PCPROTO, and
4710 * that other DLPI are M_PROTO.
4711 */
4712 if (prim == DL_INFO_REQ) {
4713 mp->b_datap->db_type = M_PCPROTO;
4714 } else {
4715 mp->b_datap->db_type = M_PROTO;
4716 }
4717
4718 mp->b_wptr = mp->b_rptr + len;
4719 bzero(mp->b_rptr, len);
4720 ((dl_unitdata_req_t *)mp->b_rptr)->dl_primitive = prim;
4721 return (mp);
4722 }
4723
4724 /*
4725 * Allocate and initialize a DLPI notification. (May be called as writer.)
4726 */
4727 mblk_t *
4728 ip_dlnotify_alloc(uint_t notification, uint_t data)
4729 {
4730 dl_notify_ind_t *notifyp;
4731 mblk_t *mp;
4732
4733 if ((mp = ip_dlpi_alloc(DL_NOTIFY_IND_SIZE, DL_NOTIFY_IND)) == NULL)
4734 return (NULL);
4735
4736 notifyp = (dl_notify_ind_t *)mp->b_rptr;
4737 notifyp->dl_notification = notification;
4738 notifyp->dl_data = data;
4739 return (mp);
4740 }
4741
4742 mblk_t *
4743 ip_dlnotify_alloc2(uint_t notification, uint_t data1, uint_t data2)
4744 {
4745 dl_notify_ind_t *notifyp;
4746 mblk_t *mp;
4747
4748 if ((mp = ip_dlpi_alloc(DL_NOTIFY_IND_SIZE, DL_NOTIFY_IND)) == NULL)
4749 return (NULL);
4750
4751 notifyp = (dl_notify_ind_t *)mp->b_rptr;
4752 notifyp->dl_notification = notification;
4753 notifyp->dl_data1 = data1;
4754 notifyp->dl_data2 = data2;
4755 return (mp);
4756 }
4757
4758 /*
4759 * Debug formatting routine. Returns a character string representation of the
4760 * addr in buf, of the form xxx.xxx.xxx.xxx. This routine takes the address
4761 * in the form of a ipaddr_t and calls ip_dot_saddr with a pointer.
4762 *
4763 * Once the ndd table-printing interfaces are removed, this can be changed to
4764 * standard dotted-decimal form.
4765 */
4766 char *
4767 ip_dot_addr(ipaddr_t addr, char *buf)
4768 {
4769 uint8_t *ap = (uint8_t *)&addr;
4770
4771 (void) mi_sprintf(buf, "%03d.%03d.%03d.%03d",
4772 ap[0] & 0xFF, ap[1] & 0xFF, ap[2] & 0xFF, ap[3] & 0xFF);
4773 return (buf);
4774 }
4775
4776 /*
4777 * Write the given MAC address as a printable string in the usual colon-
4778 * separated format.
4779 */
4780 const char *
4781 mac_colon_addr(const uint8_t *addr, size_t alen, char *buf, size_t buflen)
4782 {
4783 char *bp;
4784
4785 if (alen == 0 || buflen < 4)
4786 return ("?");
4787 bp = buf;
4788 for (;;) {
4789 /*
4790 * If there are more MAC address bytes available, but we won't
4791 * have any room to print them, then add "..." to the string
4792 * instead. See below for the 'magic number' explanation.
4793 */
4794 if ((alen == 2 && buflen < 6) || (alen > 2 && buflen < 7)) {
4795 (void) strcpy(bp, "...");
4796 break;
4797 }
4798 (void) sprintf(bp, "%02x", *addr++);
4799 bp += 2;
4800 if (--alen == 0)
4801 break;
4802 *bp++ = ':';
4803 buflen -= 3;
4804 /*
4805 * At this point, based on the first 'if' statement above,
4806 * either alen == 1 and buflen >= 3, or alen > 1 and
4807 * buflen >= 4. The first case leaves room for the final "xx"
4808 * number and trailing NUL byte. The second leaves room for at
4809 * least "...". Thus the apparently 'magic' numbers chosen for
4810 * that statement.
4811 */
4812 }
4813 return (buf);
4814 }
4815
4816 /*
4817 * Called when it is conceptually a ULP that would sent the packet
4818 * e.g., port unreachable and protocol unreachable. Check that the packet
4819 * would have passed the IPsec global policy before sending the error.
4820 *
4821 * Send an ICMP error after patching up the packet appropriately.
4822 * Uses ip_drop_input and bumps the appropriate MIB.
4823 */
4824 void
4825 ip_fanout_send_icmp_v4(mblk_t *mp, uint_t icmp_type, uint_t icmp_code,
4826 ip_recv_attr_t *ira)
4827 {
4828 ipha_t *ipha;
4829 boolean_t secure;
4830 ill_t *ill = ira->ira_ill;
4831 ip_stack_t *ipst = ill->ill_ipst;
4832 netstack_t *ns = ipst->ips_netstack;
4833 ipsec_stack_t *ipss = ns->netstack_ipsec;
4834
4835 secure = ira->ira_flags & IRAF_IPSEC_SECURE;
4836
4837 /*
4838 * We are generating an icmp error for some inbound packet.
4839 * Called from all ip_fanout_(udp, tcp, proto) functions.
4840 * Before we generate an error, check with global policy
4841 * to see whether this is allowed to enter the system. As
4842 * there is no "conn", we are checking with global policy.
4843 */
4844 ipha = (ipha_t *)mp->b_rptr;
4845 if (secure || ipss->ipsec_inbound_v4_policy_present) {
4846 mp = ipsec_check_global_policy(mp, NULL, ipha, NULL, ira, ns);
4847 if (mp == NULL)
4848 return;
4849 }
4850
4851 /* We never send errors for protocols that we do implement */
4852 if (ira->ira_protocol == IPPROTO_ICMP ||
4853 ira->ira_protocol == IPPROTO_IGMP) {
4854 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
4855 ip_drop_input("ip_fanout_send_icmp_v4", mp, ill);
4856 freemsg(mp);
4857 return;
4858 }
4859 /*
4860 * Have to correct checksum since
4861 * the packet might have been
4862 * fragmented and the reassembly code in ip_rput
4863 * does not restore the IP checksum.
4864 */
4865 ipha->ipha_hdr_checksum = 0;
4866 ipha->ipha_hdr_checksum = ip_csum_hdr(ipha);
4867
4868 switch (icmp_type) {
4869 case ICMP_DEST_UNREACHABLE:
4870 switch (icmp_code) {
4871 case ICMP_PROTOCOL_UNREACHABLE:
4872 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInUnknownProtos);
4873 ip_drop_input("ipIfStatsInUnknownProtos", mp, ill);
4874 break;
4875 case ICMP_PORT_UNREACHABLE:
4876 BUMP_MIB(ill->ill_ip_mib, udpIfStatsNoPorts);
4877 ip_drop_input("ipIfStatsNoPorts", mp, ill);
4878 break;
4879 }
4880
4881 icmp_unreachable(mp, icmp_code, ira);
4882 break;
4883 default:
4884 #ifdef DEBUG
4885 panic("ip_fanout_send_icmp_v4: wrong type");
4886 /*NOTREACHED*/
4887 #else
4888 freemsg(mp);
4889 break;
4890 #endif
4891 }
4892 }
4893
4894 /*
4895 * Used to send an ICMP error message when a packet is received for
4896 * a protocol that is not supported. The mblk passed as argument
4897 * is consumed by this function.
4898 */
4899 void
4900 ip_proto_not_sup(mblk_t *mp, ip_recv_attr_t *ira)
4901 {
4902 ipha_t *ipha;
4903
4904 ipha = (ipha_t *)mp->b_rptr;
4905 if (ira->ira_flags & IRAF_IS_IPV4) {
4906 ASSERT(IPH_HDR_VERSION(ipha) == IP_VERSION);
4907 ip_fanout_send_icmp_v4(mp, ICMP_DEST_UNREACHABLE,
4908 ICMP_PROTOCOL_UNREACHABLE, ira);
4909 } else {
4910 ASSERT(IPH_HDR_VERSION(ipha) == IPV6_VERSION);
4911 ip_fanout_send_icmp_v6(mp, ICMP6_PARAM_PROB,
4912 ICMP6_PARAMPROB_NEXTHEADER, ira);
4913 }
4914 }
4915
4916 /*
4917 * Deliver a rawip packet to the given conn, possibly applying ipsec policy.
4918 * Handles IPv4 and IPv6.
4919 * We are responsible for disposing of mp, such as by freemsg() or putnext()
4920 * Caller is responsible for dropping references to the conn.
4921 */
4922 void
4923 ip_fanout_proto_conn(conn_t *connp, mblk_t *mp, ipha_t *ipha, ip6_t *ip6h,
4924 ip_recv_attr_t *ira)
4925 {
4926 ill_t *ill = ira->ira_ill;
4927 ip_stack_t *ipst = ill->ill_ipst;
4928 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
4929 boolean_t secure;
4930 uint_t protocol = ira->ira_protocol;
4931 iaflags_t iraflags = ira->ira_flags;
4932 queue_t *rq;
4933
4934 secure = iraflags & IRAF_IPSEC_SECURE;
4935
4936 rq = connp->conn_rq;
4937 if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld : !canputnext(rq)) {
4938 switch (protocol) {
4939 case IPPROTO_ICMPV6:
4940 BUMP_MIB(ill->ill_icmp6_mib, ipv6IfIcmpInOverflows);
4941 break;
4942 case IPPROTO_ICMP:
4943 BUMP_MIB(&ipst->ips_icmp_mib, icmpInOverflows);
4944 break;
4945 default:
4946 BUMP_MIB(ill->ill_ip_mib, rawipIfStatsInOverflows);
4947 break;
4948 }
4949 freemsg(mp);
4950 return;
4951 }
4952
4953 ASSERT(!(IPCL_IS_IPTUN(connp)));
4954
4955 if (((iraflags & IRAF_IS_IPV4) ?
4956 CONN_INBOUND_POLICY_PRESENT(connp, ipss) :
4957 CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) ||
4958 secure) {
4959 mp = ipsec_check_inbound_policy(mp, connp, ipha,
4960 ip6h, ira);
4961 if (mp == NULL) {
4962 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
4963 /* Note that mp is NULL */
4964 ip_drop_input("ipIfStatsInDiscards", mp, ill);
4965 return;
4966 }
4967 }
4968
4969 if (iraflags & IRAF_ICMP_ERROR) {
4970 (connp->conn_recvicmp)(connp, mp, NULL, ira);
4971 } else {
4972 ill_t *rill = ira->ira_rill;
4973
4974 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers);
4975 ira->ira_ill = ira->ira_rill = NULL;
4976 /* Send it upstream */
4977 (connp->conn_recv)(connp, mp, NULL, ira);
4978 ira->ira_ill = ill;
4979 ira->ira_rill = rill;
4980 }
4981 }
4982
4983 /*
4984 * Handle protocols with which IP is less intimate. There
4985 * can be more than one stream bound to a particular
4986 * protocol. When this is the case, normally each one gets a copy
4987 * of any incoming packets.
4988 *
4989 * IPsec NOTE :
4990 *
4991 * Don't allow a secure packet going up a non-secure connection.
4992 * We don't allow this because
4993 *
4994 * 1) Reply might go out in clear which will be dropped at
4995 * the sending side.
4996 * 2) If the reply goes out in clear it will give the
4997 * adversary enough information for getting the key in
4998 * most of the cases.
4999 *
5000 * Moreover getting a secure packet when we expect clear
5001 * implies that SA's were added without checking for
5002 * policy on both ends. This should not happen once ISAKMP
5003 * is used to negotiate SAs as SAs will be added only after
5004 * verifying the policy.
5005 *
5006 * Zones notes:
5007 * Earlier in ip_input on a system with multiple shared-IP zones we
5008 * duplicate the multicast and broadcast packets and send them up
5009 * with each explicit zoneid that exists on that ill.
5010 * This means that here we can match the zoneid with SO_ALLZONES being special.
5011 */
5012 void
5013 ip_fanout_proto_v4(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira)
5014 {
5015 mblk_t *mp1;
5016 ipaddr_t laddr;
5017 conn_t *connp, *first_connp, *next_connp;
5018 connf_t *connfp;
5019 ill_t *ill = ira->ira_ill;
5020 ip_stack_t *ipst = ill->ill_ipst;
5021
5022 laddr = ipha->ipha_dst;
5023
5024 connfp = &ipst->ips_ipcl_proto_fanout_v4[ira->ira_protocol];
5025 mutex_enter(&connfp->connf_lock);
5026 connp = connfp->connf_head;
5027 for (connp = connfp->connf_head; connp != NULL;
5028 connp = connp->conn_next) {
5029 /* Note: IPCL_PROTO_MATCH includes conn_wantpacket */
5030 if (IPCL_PROTO_MATCH(connp, ira, ipha) &&
5031 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5032 tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp))) {
5033 break;
5034 }
5035 }
5036
5037 if (connp == NULL) {
5038 /*
5039 * No one bound to these addresses. Is
5040 * there a client that wants all
5041 * unclaimed datagrams?
5042 */
5043 mutex_exit(&connfp->connf_lock);
5044 ip_fanout_send_icmp_v4(mp, ICMP_DEST_UNREACHABLE,
5045 ICMP_PROTOCOL_UNREACHABLE, ira);
5046 return;
5047 }
5048
5049 ASSERT(IPCL_IS_NONSTR(connp) || connp->conn_rq != NULL);
5050
5051 CONN_INC_REF(connp);
5052 first_connp = connp;
5053 connp = connp->conn_next;
5054
5055 for (;;) {
5056 while (connp != NULL) {
5057 /* Note: IPCL_PROTO_MATCH includes conn_wantpacket */
5058 if (IPCL_PROTO_MATCH(connp, ira, ipha) &&
5059 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5060 tsol_receive_local(mp, &laddr, IPV4_VERSION,
5061 ira, connp)))
5062 break;
5063 connp = connp->conn_next;
5064 }
5065
5066 if (connp == NULL) {
5067 /* No more interested clients */
5068 connp = first_connp;
5069 break;
5070 }
5071 if (((mp1 = dupmsg(mp)) == NULL) &&
5072 ((mp1 = copymsg(mp)) == NULL)) {
5073 /* Memory allocation failed */
5074 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
5075 ip_drop_input("ipIfStatsInDiscards", mp, ill);
5076 connp = first_connp;
5077 break;
5078 }
5079
5080 CONN_INC_REF(connp);
5081 mutex_exit(&connfp->connf_lock);
5082
5083 ip_fanout_proto_conn(connp, mp1, (ipha_t *)mp1->b_rptr, NULL,
5084 ira);
5085
5086 mutex_enter(&connfp->connf_lock);
5087 /* Follow the next pointer before releasing the conn. */
5088 next_connp = connp->conn_next;
5089 CONN_DEC_REF(connp);
5090 connp = next_connp;
5091 }
5092
5093 /* Last one. Send it upstream. */
5094 mutex_exit(&connfp->connf_lock);
5095
5096 ip_fanout_proto_conn(connp, mp, ipha, NULL, ira);
5097
5098 CONN_DEC_REF(connp);
5099 }
5100
5101 /*
5102 * If we have a IPsec NAT-Traversal packet, strip the zero-SPI or
5103 * pass it along to ESP if the SPI is non-zero. Returns the mblk if the mblk
5104 * is not consumed.
5105 *
5106 * One of three things can happen, all of which affect the passed-in mblk:
5107 *
5108 * 1.) The packet is stock UDP and gets its zero-SPI stripped. Return mblk..
5109 *
5110 * 2.) The packet is ESP-in-UDP, gets transformed into an equivalent
5111 * ESP packet, and is passed along to ESP for consumption. Return NULL.
5112 *
5113 * 3.) The packet is an ESP-in-UDP Keepalive. Drop it and return NULL.
5114 */
5115 mblk_t *
5116 zero_spi_check(mblk_t *mp, ip_recv_attr_t *ira)
5117 {
5118 int shift, plen, iph_len;
5119 ipha_t *ipha;
5120 udpha_t *udpha;
5121 uint32_t *spi;
5122 uint32_t esp_ports;
5123 uint8_t *orptr;
5124 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
5125 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
5126
5127 ipha = (ipha_t *)mp->b_rptr;
5128 iph_len = ira->ira_ip_hdr_length;
5129 plen = ira->ira_pktlen;
5130
5131 if (plen - iph_len - sizeof (udpha_t) < sizeof (uint32_t)) {
5132 /*
5133 * Most likely a keepalive for the benefit of an intervening
5134 * NAT. These aren't for us, per se, so drop it.
5135 *
5136 * RFC 3947/8 doesn't say for sure what to do for 2-3
5137 * byte packets (keepalives are 1-byte), but we'll drop them
5138 * also.
5139 */
5140 ip_drop_packet(mp, B_TRUE, ira->ira_ill,
5141 DROPPER(ipss, ipds_esp_nat_t_ka), &ipss->ipsec_dropper);
5142 return (NULL);
5143 }
5144
5145 if (MBLKL(mp) < iph_len + sizeof (udpha_t) + sizeof (*spi)) {
5146 /* might as well pull it all up - it might be ESP. */
5147 if (!pullupmsg(mp, -1)) {
5148 ip_drop_packet(mp, B_TRUE, ira->ira_ill,
5149 DROPPER(ipss, ipds_esp_nomem),
5150 &ipss->ipsec_dropper);
5151 return (NULL);
5152 }
5153
5154 ipha = (ipha_t *)mp->b_rptr;
5155 }
5156 spi = (uint32_t *)(mp->b_rptr + iph_len + sizeof (udpha_t));
5157 if (*spi == 0) {
5158 /* UDP packet - remove 0-spi. */
5159 shift = sizeof (uint32_t);
5160 } else {
5161 /* ESP-in-UDP packet - reduce to ESP. */
5162 ipha->ipha_protocol = IPPROTO_ESP;
5163 shift = sizeof (udpha_t);
5164 }
5165
5166 /* Fix IP header */
5167 ira->ira_pktlen = (plen - shift);
5168 ipha->ipha_length = htons(ira->ira_pktlen);
5169 ipha->ipha_hdr_checksum = 0;
5170
5171 orptr = mp->b_rptr;
5172 mp->b_rptr += shift;
5173
5174 udpha = (udpha_t *)(orptr + iph_len);
5175 if (*spi == 0) {
5176 ASSERT((uint8_t *)ipha == orptr);
5177 udpha->uha_length = htons(plen - shift - iph_len);
5178 iph_len += sizeof (udpha_t); /* For the call to ovbcopy(). */
5179 esp_ports = 0;
5180 } else {
5181 esp_ports = *((uint32_t *)udpha);
5182 ASSERT(esp_ports != 0);
5183 }
5184 ovbcopy(orptr, orptr + shift, iph_len);
5185 if (esp_ports != 0) /* Punt up for ESP processing. */ {
5186 ipha = (ipha_t *)(orptr + shift);
5187
5188 ira->ira_flags |= IRAF_ESP_UDP_PORTS;
5189 ira->ira_esp_udp_ports = esp_ports;
5190 ip_fanout_v4(mp, ipha, ira);
5191 return (NULL);
5192 }
5193 return (mp);
5194 }
5195
5196 /*
5197 * Deliver a udp packet to the given conn, possibly applying ipsec policy.
5198 * Handles IPv4 and IPv6.
5199 * We are responsible for disposing of mp, such as by freemsg() or putnext()
5200 * Caller is responsible for dropping references to the conn.
5201 */
5202 void
5203 ip_fanout_udp_conn(conn_t *connp, mblk_t *mp, ipha_t *ipha, ip6_t *ip6h,
5204 ip_recv_attr_t *ira)
5205 {
5206 ill_t *ill = ira->ira_ill;
5207 ip_stack_t *ipst = ill->ill_ipst;
5208 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
5209 boolean_t secure;
5210 iaflags_t iraflags = ira->ira_flags;
5211
5212 secure = iraflags & IRAF_IPSEC_SECURE;
5213
5214 if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld :
5215 !canputnext(connp->conn_rq)) {
5216 BUMP_MIB(ill->ill_ip_mib, udpIfStatsInOverflows);
5217 freemsg(mp);
5218 return;
5219 }
5220
5221 if (((iraflags & IRAF_IS_IPV4) ?
5222 CONN_INBOUND_POLICY_PRESENT(connp, ipss) :
5223 CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) ||
5224 secure) {
5225 mp = ipsec_check_inbound_policy(mp, connp, ipha,
5226 ip6h, ira);
5227 if (mp == NULL) {
5228 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
5229 /* Note that mp is NULL */
5230 ip_drop_input("ipIfStatsInDiscards", mp, ill);
5231 return;
5232 }
5233 }
5234
5235 /*
5236 * Since this code is not used for UDP unicast we don't need a NAT_T
5237 * check. Only ip_fanout_v4 has that check.
5238 */
5239 if (ira->ira_flags & IRAF_ICMP_ERROR) {
5240 (connp->conn_recvicmp)(connp, mp, NULL, ira);
5241 } else {
5242 ill_t *rill = ira->ira_rill;
5243
5244 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers);
5245 ira->ira_ill = ira->ira_rill = NULL;
5246 /* Send it upstream */
5247 (connp->conn_recv)(connp, mp, NULL, ira);
5248 ira->ira_ill = ill;
5249 ira->ira_rill = rill;
5250 }
5251 }
5252
5253 /*
5254 * Fanout for UDP packets that are multicast or broadcast, and ICMP errors.
5255 * (Unicast fanout is handled in ip_input_v4.)
5256 *
5257 * If SO_REUSEADDR is set all multicast and broadcast packets
5258 * will be delivered to all conns bound to the same port.
5259 *
5260 * If there is at least one matching AF_INET receiver, then we will
5261 * ignore any AF_INET6 receivers.
5262 * In the special case where an AF_INET socket binds to 0.0.0.0/<port> and an
5263 * AF_INET6 socket binds to ::/<port>, only the AF_INET socket receives the IPv4
5264 * packets.
5265 *
5266 * Zones notes:
5267 * Earlier in ip_input on a system with multiple shared-IP zones we
5268 * duplicate the multicast and broadcast packets and send them up
5269 * with each explicit zoneid that exists on that ill.
5270 * This means that here we can match the zoneid with SO_ALLZONES being special.
5271 */
5272 void
5273 ip_fanout_udp_multi_v4(mblk_t *mp, ipha_t *ipha, uint16_t lport, uint16_t fport,
5274 ip_recv_attr_t *ira)
5275 {
5276 ipaddr_t laddr;
5277 in6_addr_t v6faddr;
5278 conn_t *connp;
5279 connf_t *connfp;
5280 ipaddr_t faddr;
5281 ill_t *ill = ira->ira_ill;
5282 ip_stack_t *ipst = ill->ill_ipst;
5283
5284 ASSERT(ira->ira_flags & (IRAF_MULTIBROADCAST|IRAF_ICMP_ERROR));
5285
5286 laddr = ipha->ipha_dst;
5287 faddr = ipha->ipha_src;
5288
5289 connfp = &ipst->ips_ipcl_udp_fanout[IPCL_UDP_HASH(lport, ipst)];
5290 mutex_enter(&connfp->connf_lock);
5291 connp = connfp->connf_head;
5292
5293 /*
5294 * If SO_REUSEADDR has been set on the first we send the
5295 * packet to all clients that have joined the group and
5296 * match the port.
5297 */
5298 while (connp != NULL) {
5299 if ((IPCL_UDP_MATCH(connp, lport, laddr, fport, faddr)) &&
5300 conn_wantpacket(connp, ira, ipha) &&
5301 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5302 tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp)))
5303 break;
5304 connp = connp->conn_next;
5305 }
5306
5307 if (connp == NULL)
5308 goto notfound;
5309
5310 CONN_INC_REF(connp);
5311
5312 if (connp->conn_reuseaddr) {
5313 conn_t *first_connp = connp;
5314 conn_t *next_connp;
5315 mblk_t *mp1;
5316
5317 connp = connp->conn_next;
5318 for (;;) {
5319 while (connp != NULL) {
5320 if (IPCL_UDP_MATCH(connp, lport, laddr,
5321 fport, faddr) &&
5322 conn_wantpacket(connp, ira, ipha) &&
5323 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5324 tsol_receive_local(mp, &laddr, IPV4_VERSION,
5325 ira, connp)))
5326 break;
5327 connp = connp->conn_next;
5328 }
5329 if (connp == NULL) {
5330 /* No more interested clients */
5331 connp = first_connp;
5332 break;
5333 }
5334 if (((mp1 = dupmsg(mp)) == NULL) &&
5335 ((mp1 = copymsg(mp)) == NULL)) {
5336 /* Memory allocation failed */
5337 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
5338 ip_drop_input("ipIfStatsInDiscards", mp, ill);
5339 connp = first_connp;
5340 break;
5341 }
5342 CONN_INC_REF(connp);
5343 mutex_exit(&connfp->connf_lock);
5344
5345 IP_STAT(ipst, ip_udp_fanmb);
5346 ip_fanout_udp_conn(connp, mp1, (ipha_t *)mp1->b_rptr,
5347 NULL, ira);
5348 mutex_enter(&connfp->connf_lock);
5349 /* Follow the next pointer before releasing the conn */
5350 next_connp = connp->conn_next;
5351 CONN_DEC_REF(connp);
5352 connp = next_connp;
5353 }
5354 }
5355
5356 /* Last one. Send it upstream. */
5357 mutex_exit(&connfp->connf_lock);
5358 IP_STAT(ipst, ip_udp_fanmb);
5359 ip_fanout_udp_conn(connp, mp, ipha, NULL, ira);
5360 CONN_DEC_REF(connp);
5361 return;
5362
5363 notfound:
5364 mutex_exit(&connfp->connf_lock);
5365 /*
5366 * IPv6 endpoints bound to multicast IPv4-mapped addresses
5367 * have already been matched above, since they live in the IPv4
5368 * fanout tables. This implies we only need to
5369 * check for IPv6 in6addr_any endpoints here.
5370 * Thus we compare using ipv6_all_zeros instead of the destination
5371 * address, except for the multicast group membership lookup which
5372 * uses the IPv4 destination.
5373 */
5374 IN6_IPADDR_TO_V4MAPPED(ipha->ipha_src, &v6faddr);
5375 connfp = &ipst->ips_ipcl_udp_fanout[IPCL_UDP_HASH(lport, ipst)];
5376 mutex_enter(&connfp->connf_lock);
5377 connp = connfp->connf_head;
5378 /*
5379 * IPv4 multicast packet being delivered to an AF_INET6
5380 * in6addr_any endpoint.
5381 * Need to check conn_wantpacket(). Note that we use conn_wantpacket()
5382 * and not conn_wantpacket_v6() since any multicast membership is
5383 * for an IPv4-mapped multicast address.
5384 */
5385 while (connp != NULL) {
5386 if (IPCL_UDP_MATCH_V6(connp, lport, ipv6_all_zeros,
5387 fport, v6faddr) &&
5388 conn_wantpacket(connp, ira, ipha) &&
5389 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5390 tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp)))
5391 break;
5392 connp = connp->conn_next;
5393 }
5394
5395 if (connp == NULL) {
5396 /*
5397 * No one bound to this port. Is
5398 * there a client that wants all
5399 * unclaimed datagrams?
5400 */
5401 mutex_exit(&connfp->connf_lock);
5402
5403 if (ipst->ips_ipcl_proto_fanout_v4[IPPROTO_UDP].connf_head !=
5404 NULL) {
5405 ASSERT(ira->ira_protocol == IPPROTO_UDP);
5406 ip_fanout_proto_v4(mp, ipha, ira);
5407 } else {
5408 /*
5409 * We used to attempt to send an icmp error here, but
5410 * since this is known to be a multicast packet
5411 * and we don't send icmp errors in response to
5412 * multicast, just drop the packet and give up sooner.
5413 */
5414 BUMP_MIB(ill->ill_ip_mib, udpIfStatsNoPorts);
5415 freemsg(mp);
5416 }
5417 return;
5418 }
5419 ASSERT(IPCL_IS_NONSTR(connp) || connp->conn_rq != NULL);
5420
5421 /*
5422 * If SO_REUSEADDR has been set on the first we send the
5423 * packet to all clients that have joined the group and
5424 * match the port.
5425 */
5426 if (connp->conn_reuseaddr) {
5427 conn_t *first_connp = connp;
5428 conn_t *next_connp;
5429 mblk_t *mp1;
5430
5431 CONN_INC_REF(connp);
5432 connp = connp->conn_next;
5433 for (;;) {
5434 while (connp != NULL) {
5435 if (IPCL_UDP_MATCH_V6(connp, lport,
5436 ipv6_all_zeros, fport, v6faddr) &&
5437 conn_wantpacket(connp, ira, ipha) &&
5438 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5439 tsol_receive_local(mp, &laddr, IPV4_VERSION,
5440 ira, connp)))
5441 break;
5442 connp = connp->conn_next;
5443 }
5444 if (connp == NULL) {
5445 /* No more interested clients */
5446 connp = first_connp;
5447 break;
5448 }
5449 if (((mp1 = dupmsg(mp)) == NULL) &&
5450 ((mp1 = copymsg(mp)) == NULL)) {
5451 /* Memory allocation failed */
5452 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
5453 ip_drop_input("ipIfStatsInDiscards", mp, ill);
5454 connp = first_connp;
5455 break;
5456 }
5457 CONN_INC_REF(connp);
5458 mutex_exit(&connfp->connf_lock);
5459
5460 IP_STAT(ipst, ip_udp_fanmb);
5461 ip_fanout_udp_conn(connp, mp1, (ipha_t *)mp1->b_rptr,
5462 NULL, ira);
5463 mutex_enter(&connfp->connf_lock);
5464 /* Follow the next pointer before releasing the conn */
5465 next_connp = connp->conn_next;
5466 CONN_DEC_REF(connp);
5467 connp = next_connp;
5468 }
5469 }
5470
5471 /* Last one. Send it upstream. */
5472 mutex_exit(&connfp->connf_lock);
5473 IP_STAT(ipst, ip_udp_fanmb);
5474 ip_fanout_udp_conn(connp, mp, ipha, NULL, ira);
5475 CONN_DEC_REF(connp);
5476 }
5477
5478 /*
5479 * Split an incoming packet's IPv4 options into the label and the other options.
5480 * If 'allocate' is set it does memory allocation for the ip_pkt_t, including
5481 * clearing out any leftover label or options.
5482 * Otherwise it just makes ipp point into the packet.
5483 *
5484 * Returns zero if ok; ENOMEM if the buffer couldn't be allocated.
5485 */
5486 int
5487 ip_find_hdr_v4(ipha_t *ipha, ip_pkt_t *ipp, boolean_t allocate)
5488 {
5489 uchar_t *opt;
5490 uint32_t totallen;
5491 uint32_t optval;
5492 uint32_t optlen;
5493
5494 ipp->ipp_fields |= IPPF_HOPLIMIT | IPPF_TCLASS | IPPF_ADDR;
5495 ipp->ipp_hoplimit = ipha->ipha_ttl;
5496 ipp->ipp_type_of_service = ipha->ipha_type_of_service;
5497 IN6_IPADDR_TO_V4MAPPED(ipha->ipha_dst, &ipp->ipp_addr);
5498
5499 /*
5500 * Get length (in 4 byte octets) of IP header options.
5501 */
5502 totallen = ipha->ipha_version_and_hdr_length -
5503 (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS);
5504
5505 if (totallen == 0) {
5506 if (!allocate)
5507 return (0);
5508
5509 /* Clear out anything from a previous packet */
5510 if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) {
5511 kmem_free(ipp->ipp_ipv4_options,
5512 ipp->ipp_ipv4_options_len);
5513 ipp->ipp_ipv4_options = NULL;
5514 ipp->ipp_ipv4_options_len = 0;
5515 ipp->ipp_fields &= ~IPPF_IPV4_OPTIONS;
5516 }
5517 if (ipp->ipp_fields & IPPF_LABEL_V4) {
5518 kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4);
5519 ipp->ipp_label_v4 = NULL;
5520 ipp->ipp_label_len_v4 = 0;
5521 ipp->ipp_fields &= ~IPPF_LABEL_V4;
5522 }
5523 return (0);
5524 }
5525
5526 totallen <<= 2;
5527 opt = (uchar_t *)&ipha[1];
5528 if (!is_system_labeled()) {
5529
5530 copyall:
5531 if (!allocate) {
5532 if (totallen != 0) {
5533 ipp->ipp_ipv4_options = opt;
5534 ipp->ipp_ipv4_options_len = totallen;
5535 ipp->ipp_fields |= IPPF_IPV4_OPTIONS;
5536 }
5537 return (0);
5538 }
5539 /* Just copy all of options */
5540 if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) {
5541 if (totallen == ipp->ipp_ipv4_options_len) {
5542 bcopy(opt, ipp->ipp_ipv4_options, totallen);
5543 return (0);
5544 }
5545 kmem_free(ipp->ipp_ipv4_options,
5546 ipp->ipp_ipv4_options_len);
5547 ipp->ipp_ipv4_options = NULL;
5548 ipp->ipp_ipv4_options_len = 0;
5549 ipp->ipp_fields &= ~IPPF_IPV4_OPTIONS;
5550 }
5551 if (totallen == 0)
5552 return (0);
5553
5554 ipp->ipp_ipv4_options = kmem_alloc(totallen, KM_NOSLEEP);
5555 if (ipp->ipp_ipv4_options == NULL)
5556 return (ENOMEM);
5557 ipp->ipp_ipv4_options_len = totallen;
5558 ipp->ipp_fields |= IPPF_IPV4_OPTIONS;
5559 bcopy(opt, ipp->ipp_ipv4_options, totallen);
5560 return (0);
5561 }
5562
5563 if (allocate && (ipp->ipp_fields & IPPF_LABEL_V4)) {
5564 kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4);
5565 ipp->ipp_label_v4 = NULL;
5566 ipp->ipp_label_len_v4 = 0;
5567 ipp->ipp_fields &= ~IPPF_LABEL_V4;
5568 }
5569
5570 /*
5571 * Search for CIPSO option.
5572 * We assume CIPSO is first in options if it is present.
5573 * If it isn't, then ipp_opt_ipv4_options will not include the options
5574 * prior to the CIPSO option.
5575 */
5576 while (totallen != 0) {
5577 switch (optval = opt[IPOPT_OPTVAL]) {
5578 case IPOPT_EOL:
5579 return (0);
5580 case IPOPT_NOP:
5581 optlen = 1;
5582 break;
5583 default:
5584 if (totallen <= IPOPT_OLEN)
5585 return (EINVAL);
5586 optlen = opt[IPOPT_OLEN];
5587 if (optlen < 2)
5588 return (EINVAL);
5589 }
5590 if (optlen > totallen)
5591 return (EINVAL);
5592
5593 switch (optval) {
5594 case IPOPT_COMSEC:
5595 if (!allocate) {
5596 ipp->ipp_label_v4 = opt;
5597 ipp->ipp_label_len_v4 = optlen;
5598 ipp->ipp_fields |= IPPF_LABEL_V4;
5599 } else {
5600 ipp->ipp_label_v4 = kmem_alloc(optlen,
5601 KM_NOSLEEP);
5602 if (ipp->ipp_label_v4 == NULL)
5603 return (ENOMEM);
5604 ipp->ipp_label_len_v4 = optlen;
5605 ipp->ipp_fields |= IPPF_LABEL_V4;
5606 bcopy(opt, ipp->ipp_label_v4, optlen);
5607 }
5608 totallen -= optlen;
5609 opt += optlen;
5610
5611 /* Skip padding bytes until we get to a multiple of 4 */
5612 while ((totallen & 3) != 0 && opt[0] == IPOPT_NOP) {
5613 totallen--;
5614 opt++;
5615 }
5616 /* Remaining as ipp_ipv4_options */
5617 goto copyall;
5618 }
5619 totallen -= optlen;
5620 opt += optlen;
5621 }
5622 /* No CIPSO found; return everything as ipp_ipv4_options */
5623 totallen = ipha->ipha_version_and_hdr_length -
5624 (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS);
5625 totallen <<= 2;
5626 opt = (uchar_t *)&ipha[1];
5627 goto copyall;
5628 }
5629
5630 /*
5631 * Efficient versions of lookup for an IRE when we only
5632 * match the address.
5633 * For RTF_REJECT or BLACKHOLE we return IRE_NOROUTE.
5634 * Does not handle multicast addresses.
5635 */
5636 uint_t
5637 ip_type_v4(ipaddr_t addr, ip_stack_t *ipst)
5638 {
5639 ire_t *ire;
5640 uint_t result;
5641
5642 ire = ire_ftable_lookup_simple_v4(addr, 0, ipst, NULL);
5643 ASSERT(ire != NULL);
5644 if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))
5645 result = IRE_NOROUTE;
5646 else
5647 result = ire->ire_type;
5648 ire_refrele(ire);
5649 return (result);
5650 }
5651
5652 /*
5653 * Efficient versions of lookup for an IRE when we only
5654 * match the address.
5655 * For RTF_REJECT or BLACKHOLE we return IRE_NOROUTE.
5656 * Does not handle multicast addresses.
5657 */
5658 uint_t
5659 ip_type_v6(const in6_addr_t *addr, ip_stack_t *ipst)
5660 {
5661 ire_t *ire;
5662 uint_t result;
5663
5664 ire = ire_ftable_lookup_simple_v6(addr, 0, ipst, NULL);
5665 ASSERT(ire != NULL);
5666 if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))
5667 result = IRE_NOROUTE;
5668 else
5669 result = ire->ire_type;
5670 ire_refrele(ire);
5671 return (result);
5672 }
5673
5674 /*
5675 * Nobody should be sending
5676 * packets up this stream
5677 */
5678 static void
5679 ip_lrput(queue_t *q, mblk_t *mp)
5680 {
5681 switch (mp->b_datap->db_type) {
5682 case M_FLUSH:
5683 /* Turn around */
5684 if (*mp->b_rptr & FLUSHW) {
5685 *mp->b_rptr &= ~FLUSHR;
5686 qreply(q, mp);
5687 return;
5688 }
5689 break;
5690 }
5691 freemsg(mp);
5692 }
5693
5694 /* Nobody should be sending packets down this stream */
5695 /* ARGSUSED */
5696 void
5697 ip_lwput(queue_t *q, mblk_t *mp)
5698 {
5699 freemsg(mp);
5700 }
5701
5702 /*
5703 * Move the first hop in any source route to ipha_dst and remove that part of
5704 * the source route. Called by other protocols. Errors in option formatting
5705 * are ignored - will be handled by ip_output_options. Return the final
5706 * destination (either ipha_dst or the last entry in a source route.)
5707 */
5708 ipaddr_t
5709 ip_massage_options(ipha_t *ipha, netstack_t *ns)
5710 {
5711 ipoptp_t opts;
5712 uchar_t *opt;
5713 uint8_t optval;
5714 uint8_t optlen;
5715 ipaddr_t dst;
5716 int i;
5717 ip_stack_t *ipst = ns->netstack_ip;
5718
5719 ip2dbg(("ip_massage_options\n"));
5720 dst = ipha->ipha_dst;
5721 for (optval = ipoptp_first(&opts, ipha);
5722 optval != IPOPT_EOL;
5723 optval = ipoptp_next(&opts)) {
5724 opt = opts.ipoptp_cur;
5725 switch (optval) {
5726 uint8_t off;
5727 case IPOPT_SSRR:
5728 case IPOPT_LSRR:
5729 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
5730 ip1dbg(("ip_massage_options: bad src route\n"));
5731 break;
5732 }
5733 optlen = opts.ipoptp_len;
5734 off = opt[IPOPT_OFFSET];
5735 off--;
5736 redo_srr:
5737 if (optlen < IP_ADDR_LEN ||
5738 off > optlen - IP_ADDR_LEN) {
5739 /* End of source route */
5740 ip1dbg(("ip_massage_options: end of SR\n"));
5741 break;
5742 }
5743 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
5744 ip1dbg(("ip_massage_options: next hop 0x%x\n",
5745 ntohl(dst)));
5746 /*
5747 * Check if our address is present more than
5748 * once as consecutive hops in source route.
5749 * XXX verify per-interface ip_forwarding
5750 * for source route?
5751 */
5752 if (ip_type_v4(dst, ipst) == IRE_LOCAL) {
5753 off += IP_ADDR_LEN;
5754 goto redo_srr;
5755 }
5756 if (dst == htonl(INADDR_LOOPBACK)) {
5757 ip1dbg(("ip_massage_options: loopback addr in "
5758 "source route!\n"));
5759 break;
5760 }
5761 /*
5762 * Update ipha_dst to be the first hop and remove the
5763 * first hop from the source route (by overwriting
5764 * part of the option with NOP options).
5765 */
5766 ipha->ipha_dst = dst;
5767 /* Put the last entry in dst */
5768 off = ((optlen - IP_ADDR_LEN - 3) & ~(IP_ADDR_LEN-1)) +
5769 3;
5770 bcopy(&opt[off], &dst, IP_ADDR_LEN);
5771
5772 ip1dbg(("ip_massage_options: last hop 0x%x\n",
5773 ntohl(dst)));
5774 /* Move down and overwrite */
5775 opt[IP_ADDR_LEN] = opt[0];
5776 opt[IP_ADDR_LEN+1] = opt[IPOPT_OLEN] - IP_ADDR_LEN;
5777 opt[IP_ADDR_LEN+2] = opt[IPOPT_OFFSET];
5778 for (i = 0; i < IP_ADDR_LEN; i++)
5779 opt[i] = IPOPT_NOP;
5780 break;
5781 }
5782 }
5783 return (dst);
5784 }
5785
5786 /*
5787 * Return the network mask
5788 * associated with the specified address.
5789 */
5790 ipaddr_t
5791 ip_net_mask(ipaddr_t addr)
5792 {
5793 uchar_t *up = (uchar_t *)&addr;
5794 ipaddr_t mask = 0;
5795 uchar_t *maskp = (uchar_t *)&mask;
5796
5797 #if defined(__i386) || defined(__amd64)
5798 #define TOTALLY_BRAIN_DAMAGED_C_COMPILER
5799 #endif
5800 #ifdef TOTALLY_BRAIN_DAMAGED_C_COMPILER
5801 maskp[0] = maskp[1] = maskp[2] = maskp[3] = 0;
5802 #endif
5803 if (CLASSD(addr)) {
5804 maskp[0] = 0xF0;
5805 return (mask);
5806 }
5807
5808 /* We assume Class E default netmask to be 32 */
5809 if (CLASSE(addr))
5810 return (0xffffffffU);
5811
5812 if (addr == 0)
5813 return (0);
5814 maskp[0] = 0xFF;
5815 if ((up[0] & 0x80) == 0)
5816 return (mask);
5817
5818 maskp[1] = 0xFF;
5819 if ((up[0] & 0xC0) == 0x80)
5820 return (mask);
5821
5822 maskp[2] = 0xFF;
5823 if ((up[0] & 0xE0) == 0xC0)
5824 return (mask);
5825
5826 /* Otherwise return no mask */
5827 return ((ipaddr_t)0);
5828 }
5829
5830 /* Name/Value Table Lookup Routine */
5831 char *
5832 ip_nv_lookup(nv_t *nv, int value)
5833 {
5834 if (!nv)
5835 return (NULL);
5836 for (; nv->nv_name; nv++) {
5837 if (nv->nv_value == value)
5838 return (nv->nv_name);
5839 }
5840 return ("unknown");
5841 }
5842
5843 static int
5844 ip_wait_for_info_ack(ill_t *ill)
5845 {
5846 int err;
5847
5848 mutex_enter(&ill->ill_lock);
5849 while (ill->ill_state_flags & ILL_LL_SUBNET_PENDING) {
5850 /*
5851 * Return value of 0 indicates a pending signal.
5852 */
5853 err = cv_wait_sig(&ill->ill_cv, &ill->ill_lock);
5854 if (err == 0) {
5855 mutex_exit(&ill->ill_lock);
5856 return (EINTR);
5857 }
5858 }
5859 mutex_exit(&ill->ill_lock);
5860 /*
5861 * ip_rput_other could have set an error in ill_error on
5862 * receipt of M_ERROR.
5863 */
5864 return (ill->ill_error);
5865 }
5866
5867 /*
5868 * This is a module open, i.e. this is a control stream for access
5869 * to a DLPI device. We allocate an ill_t as the instance data in
5870 * this case.
5871 */
5872 static int
5873 ip_modopen(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
5874 {
5875 ill_t *ill;
5876 int err;
5877 zoneid_t zoneid;
5878 netstack_t *ns;
5879 ip_stack_t *ipst;
5880
5881 /*
5882 * Prevent unprivileged processes from pushing IP so that
5883 * they can't send raw IP.
5884 */
5885 if (secpolicy_net_rawaccess(credp) != 0)
5886 return (EPERM);
5887
5888 ns = netstack_find_by_cred(credp);
5889 ASSERT(ns != NULL);
5890 ipst = ns->netstack_ip;
5891 ASSERT(ipst != NULL);
5892
5893 /*
5894 * For exclusive stacks we set the zoneid to zero
5895 * to make IP operate as if in the global zone.
5896 */
5897 if (ipst->ips_netstack->netstack_stackid != GLOBAL_NETSTACKID)
5898 zoneid = GLOBAL_ZONEID;
5899 else
5900 zoneid = crgetzoneid(credp);
5901
5902 ill = (ill_t *)mi_open_alloc_sleep(sizeof (ill_t));
5903 q->q_ptr = WR(q)->q_ptr = ill;
5904 ill->ill_ipst = ipst;
5905 ill->ill_zoneid = zoneid;
5906
5907 /*
5908 * ill_init initializes the ill fields and then sends down
5909 * down a DL_INFO_REQ after calling qprocson.
5910 */
5911 err = ill_init(q, ill);
5912
5913 if (err != 0) {
5914 mi_free(ill);
5915 netstack_rele(ipst->ips_netstack);
5916 q->q_ptr = NULL;
5917 WR(q)->q_ptr = NULL;
5918 return (err);
5919 }
5920
5921 /*
5922 * Wait for the DL_INFO_ACK if a DL_INFO_REQ was sent.
5923 *
5924 * ill_init initializes the ipsq marking this thread as
5925 * writer
5926 */
5927 ipsq_exit(ill->ill_phyint->phyint_ipsq);
5928 err = ip_wait_for_info_ack(ill);
5929 if (err == 0)
5930 ill->ill_credp = credp;
5931 else
5932 goto fail;
5933
5934 crhold(credp);
5935
5936 mutex_enter(&ipst->ips_ip_mi_lock);
5937 err = mi_open_link(&ipst->ips_ip_g_head, (IDP)q->q_ptr, devp, flag,
5938 sflag, credp);
5939 mutex_exit(&ipst->ips_ip_mi_lock);
5940 fail:
5941 if (err) {
5942 (void) ip_close(q, 0);
5943 return (err);
5944 }
5945 return (0);
5946 }
5947
5948 /* For /dev/ip aka AF_INET open */
5949 int
5950 ip_openv4(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
5951 {
5952 return (ip_open(q, devp, flag, sflag, credp, B_FALSE));
5953 }
5954
5955 /* For /dev/ip6 aka AF_INET6 open */
5956 int
5957 ip_openv6(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
5958 {
5959 return (ip_open(q, devp, flag, sflag, credp, B_TRUE));
5960 }
5961
5962 /* IP open routine. */
5963 int
5964 ip_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp,
5965 boolean_t isv6)
5966 {
5967 conn_t *connp;
5968 major_t maj;
5969 zoneid_t zoneid;
5970 netstack_t *ns;
5971 ip_stack_t *ipst;
5972
5973 /* Allow reopen. */
5974 if (q->q_ptr != NULL)
5975 return (0);
5976
5977 if (sflag & MODOPEN) {
5978 /* This is a module open */
5979 return (ip_modopen(q, devp, flag, sflag, credp));
5980 }
5981
5982 if ((flag & ~(FKLYR)) == IP_HELPER_STR) {
5983 /*
5984 * Non streams based socket looking for a stream
5985 * to access IP
5986 */
5987 return (ip_helper_stream_setup(q, devp, flag, sflag,
5988 credp, isv6));
5989 }
5990
5991 ns = netstack_find_by_cred(credp);
5992 ASSERT(ns != NULL);
5993 ipst = ns->netstack_ip;
5994 ASSERT(ipst != NULL);
5995
5996 /*
5997 * For exclusive stacks we set the zoneid to zero
5998 * to make IP operate as if in the global zone.
5999 */
6000 if (ipst->ips_netstack->netstack_stackid != GLOBAL_NETSTACKID)
6001 zoneid = GLOBAL_ZONEID;
6002 else
6003 zoneid = crgetzoneid(credp);
6004
6005 /*
6006 * We are opening as a device. This is an IP client stream, and we
6007 * allocate an conn_t as the instance data.
6008 */
6009 connp = ipcl_conn_create(IPCL_IPCCONN, KM_SLEEP, ipst->ips_netstack);
6010
6011 /*
6012 * ipcl_conn_create did a netstack_hold. Undo the hold that was
6013 * done by netstack_find_by_cred()
6014 */
6015 netstack_rele(ipst->ips_netstack);
6016
6017 connp->conn_ixa->ixa_flags |= IXAF_MULTICAST_LOOP | IXAF_SET_ULP_CKSUM;
6018 /* conn_allzones can not be set this early, hence no IPCL_ZONEID */
6019 connp->conn_ixa->ixa_zoneid = zoneid;
6020 connp->conn_zoneid = zoneid;
6021
6022 connp->conn_rq = q;
6023 q->q_ptr = WR(q)->q_ptr = connp;
6024
6025 /* Minor tells us which /dev entry was opened */
6026 if (isv6) {
6027 connp->conn_family = AF_INET6;
6028 connp->conn_ipversion = IPV6_VERSION;
6029 connp->conn_ixa->ixa_flags &= ~IXAF_IS_IPV4;
6030 connp->conn_ixa->ixa_src_preferences = IPV6_PREFER_SRC_DEFAULT;
6031 } else {
6032 connp->conn_family = AF_INET;
6033 connp->conn_ipversion = IPV4_VERSION;
6034 connp->conn_ixa->ixa_flags |= IXAF_IS_IPV4;
6035 }
6036
6037 if ((ip_minor_arena_la != NULL) && (flag & SO_SOCKSTR) &&
6038 ((connp->conn_dev = inet_minor_alloc(ip_minor_arena_la)) != 0)) {
6039 connp->conn_minor_arena = ip_minor_arena_la;
6040 } else {
6041 /*
6042 * Either minor numbers in the large arena were exhausted
6043 * or a non socket application is doing the open.
6044 * Try to allocate from the small arena.
6045 */
6046 if ((connp->conn_dev =
6047 inet_minor_alloc(ip_minor_arena_sa)) == 0) {
6048 /* CONN_DEC_REF takes care of netstack_rele() */
6049 q->q_ptr = WR(q)->q_ptr = NULL;
6050 CONN_DEC_REF(connp);
6051 return (EBUSY);
6052 }
6053 connp->conn_minor_arena = ip_minor_arena_sa;
6054 }
6055
6056 maj = getemajor(*devp);
6057 *devp = makedevice(maj, (minor_t)connp->conn_dev);
6058
6059 /*
6060 * connp->conn_cred is crfree()ed in ipcl_conn_destroy()
6061 */
6062 connp->conn_cred = credp;
6063 connp->conn_cpid = curproc->p_pid;
6064 /* Cache things in ixa without an extra refhold */
6065 ASSERT(!(connp->conn_ixa->ixa_free_flags & IXA_FREE_CRED));
6066 connp->conn_ixa->ixa_cred = connp->conn_cred;
6067 connp->conn_ixa->ixa_cpid = connp->conn_cpid;
6068 if (is_system_labeled())
6069 connp->conn_ixa->ixa_tsl = crgetlabel(connp->conn_cred);
6070
6071 /*
6072 * Handle IP_IOC_RTS_REQUEST and other ioctls which use conn_recv
6073 */
6074 connp->conn_recv = ip_conn_input;
6075 connp->conn_recvicmp = ip_conn_input_icmp;
6076
6077 crhold(connp->conn_cred);
6078
6079 /*
6080 * If the caller has the process-wide flag set, then default to MAC
6081 * exempt mode. This allows read-down to unlabeled hosts.
6082 */
6083 if (getpflags(NET_MAC_AWARE, credp) != 0)
6084 connp->conn_mac_mode = CONN_MAC_AWARE;
6085
6086 connp->conn_zone_is_global = (crgetzoneid(credp) == GLOBAL_ZONEID);
6087
6088 connp->conn_rq = q;
6089 connp->conn_wq = WR(q);
6090
6091 /* Non-zero default values */
6092 connp->conn_ixa->ixa_flags |= IXAF_MULTICAST_LOOP;
6093
6094 /*
6095 * Make the conn globally visible to walkers
6096 */
6097 ASSERT(connp->conn_ref == 1);
6098 mutex_enter(&connp->conn_lock);
6099 connp->conn_state_flags &= ~CONN_INCIPIENT;
6100 mutex_exit(&connp->conn_lock);
6101
6102 qprocson(q);
6103
6104 return (0);
6105 }
6106
6107 /*
6108 * Set IPsec policy from an ipsec_req_t. If the req is not "zero" and valid,
6109 * all of them are copied to the conn_t. If the req is "zero", the policy is
6110 * zeroed out. A "zero" policy has zero ipsr_{ah,req,self_encap}_req
6111 * fields.
6112 * We keep only the latest setting of the policy and thus policy setting
6113 * is not incremental/cumulative.
6114 *
6115 * Requests to set policies with multiple alternative actions will
6116 * go through a different API.
6117 */
6118 int
6119 ipsec_set_req(cred_t *cr, conn_t *connp, ipsec_req_t *req)
6120 {
6121 uint_t ah_req = 0;
6122 uint_t esp_req = 0;
6123 uint_t se_req = 0;
6124 ipsec_act_t *actp = NULL;
6125 uint_t nact;
6126 ipsec_policy_head_t *ph;
6127 boolean_t is_pol_reset, is_pol_inserted = B_FALSE;
6128 int error = 0;
6129 netstack_t *ns = connp->conn_netstack;
6130 ip_stack_t *ipst = ns->netstack_ip;
6131 ipsec_stack_t *ipss = ns->netstack_ipsec;
6132
6133 #define REQ_MASK (IPSEC_PREF_REQUIRED|IPSEC_PREF_NEVER)
6134
6135 /*
6136 * The IP_SEC_OPT option does not allow variable length parameters,
6137 * hence a request cannot be NULL.
6138 */
6139 if (req == NULL)
6140 return (EINVAL);
6141
6142 ah_req = req->ipsr_ah_req;
6143 esp_req = req->ipsr_esp_req;
6144 se_req = req->ipsr_self_encap_req;
6145
6146 /* Don't allow setting self-encap without one or more of AH/ESP. */
6147 if (se_req != 0 && esp_req == 0 && ah_req == 0)
6148 return (EINVAL);
6149
6150 /*
6151 * Are we dealing with a request to reset the policy (i.e.
6152 * zero requests).
6153 */
6154 is_pol_reset = ((ah_req & REQ_MASK) == 0 &&
6155 (esp_req & REQ_MASK) == 0 &&
6156 (se_req & REQ_MASK) == 0);
6157
6158 if (!is_pol_reset) {
6159 /*
6160 * If we couldn't load IPsec, fail with "protocol
6161 * not supported".
6162 * IPsec may not have been loaded for a request with zero
6163 * policies, so we don't fail in this case.
6164 */
6165 mutex_enter(&ipss->ipsec_loader_lock);
6166 if (ipss->ipsec_loader_state != IPSEC_LOADER_SUCCEEDED) {
6167 mutex_exit(&ipss->ipsec_loader_lock);
6168 return (EPROTONOSUPPORT);
6169 }
6170 mutex_exit(&ipss->ipsec_loader_lock);
6171
6172 /*
6173 * Test for valid requests. Invalid algorithms
6174 * need to be tested by IPsec code because new
6175 * algorithms can be added dynamically.
6176 */
6177 if ((ah_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0 ||
6178 (esp_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0 ||
6179 (se_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0) {
6180 return (EINVAL);
6181 }
6182
6183 /*
6184 * Only privileged users can issue these
6185 * requests.
6186 */
6187 if (((ah_req & IPSEC_PREF_NEVER) ||
6188 (esp_req & IPSEC_PREF_NEVER) ||
6189 (se_req & IPSEC_PREF_NEVER)) &&
6190 secpolicy_ip_config(cr, B_FALSE) != 0) {
6191 return (EPERM);
6192 }
6193
6194 /*
6195 * The IPSEC_PREF_REQUIRED and IPSEC_PREF_NEVER
6196 * are mutually exclusive.
6197 */
6198 if (((ah_req & REQ_MASK) == REQ_MASK) ||
6199 ((esp_req & REQ_MASK) == REQ_MASK) ||
6200 ((se_req & REQ_MASK) == REQ_MASK)) {
6201 /* Both of them are set */
6202 return (EINVAL);
6203 }
6204 }
6205
6206 ASSERT(MUTEX_HELD(&connp->conn_lock));
6207
6208 /*
6209 * If we have already cached policies in conn_connect(), don't
6210 * let them change now. We cache policies for connections
6211 * whose src,dst [addr, port] is known.
6212 */
6213 if (connp->conn_policy_cached) {
6214 return (EINVAL);
6215 }
6216
6217 /*
6218 * We have a zero policies, reset the connection policy if already
6219 * set. This will cause the connection to inherit the
6220 * global policy, if any.
6221 */
6222 if (is_pol_reset) {
6223 if (connp->conn_policy != NULL) {
6224 IPPH_REFRELE(connp->conn_policy, ipst->ips_netstack);
6225 connp->conn_policy = NULL;
6226 }
6227 connp->conn_in_enforce_policy = B_FALSE;
6228 connp->conn_out_enforce_policy = B_FALSE;
6229 return (0);
6230 }
6231
6232 ph = connp->conn_policy = ipsec_polhead_split(connp->conn_policy,
6233 ipst->ips_netstack);
6234 if (ph == NULL)
6235 goto enomem;
6236
6237 ipsec_actvec_from_req(req, &actp, &nact, ipst->ips_netstack);
6238 if (actp == NULL)
6239 goto enomem;
6240
6241 /*
6242 * Always insert IPv4 policy entries, since they can also apply to
6243 * ipv6 sockets being used in ipv4-compat mode.
6244 */
6245 if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V4,
6246 IPSEC_TYPE_INBOUND, ns))
6247 goto enomem;
6248 is_pol_inserted = B_TRUE;
6249 if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V4,
6250 IPSEC_TYPE_OUTBOUND, ns))
6251 goto enomem;
6252
6253 /*
6254 * We're looking at a v6 socket, also insert the v6-specific
6255 * entries.
6256 */
6257 if (connp->conn_family == AF_INET6) {
6258 if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V6,
6259 IPSEC_TYPE_INBOUND, ns))
6260 goto enomem;
6261 if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V6,
6262 IPSEC_TYPE_OUTBOUND, ns))
6263 goto enomem;
6264 }
6265
6266 ipsec_actvec_free(actp, nact);
6267
6268 /*
6269 * If the requests need security, set enforce_policy.
6270 * If the requests are IPSEC_PREF_NEVER, one should
6271 * still set conn_out_enforce_policy so that ip_set_destination
6272 * marks the ip_xmit_attr_t appropriatly. This is needed so that
6273 * for connections that we don't cache policy in at connect time,
6274 * if global policy matches in ip_output_attach_policy, we
6275 * don't wrongly inherit global policy. Similarly, we need
6276 * to set conn_in_enforce_policy also so that we don't verify
6277 * policy wrongly.
6278 */
6279 if ((ah_req & REQ_MASK) != 0 ||
6280 (esp_req & REQ_MASK) != 0 ||
6281 (se_req & REQ_MASK) != 0) {
6282 connp->conn_in_enforce_policy = B_TRUE;
6283 connp->conn_out_enforce_policy = B_TRUE;
6284 }
6285
6286 return (error);
6287 #undef REQ_MASK
6288
6289 /*
6290 * Common memory-allocation-failure exit path.
6291 */
6292 enomem:
6293 if (actp != NULL)
6294 ipsec_actvec_free(actp, nact);
6295 if (is_pol_inserted)
6296 ipsec_polhead_flush(ph, ns);
6297 return (ENOMEM);
6298 }
6299
6300 /*
6301 * Set socket options for joining and leaving multicast groups.
6302 * Common to IPv4 and IPv6; inet6 indicates the type of socket.
6303 * The caller has already check that the option name is consistent with
6304 * the address family of the socket.
6305 */
6306 int
6307 ip_opt_set_multicast_group(conn_t *connp, t_scalar_t name,
6308 uchar_t *invalp, boolean_t inet6, boolean_t checkonly)
6309 {
6310 int *i1 = (int *)invalp;
6311 int error = 0;
6312 ip_stack_t *ipst = connp->conn_netstack->netstack_ip;
6313 struct ip_mreq *v4_mreqp;
6314 struct ipv6_mreq *v6_mreqp;
6315 struct group_req *greqp;
6316 ire_t *ire;
6317 boolean_t done = B_FALSE;
6318 ipaddr_t ifaddr;
6319 in6_addr_t v6group;
6320 uint_t ifindex;
6321 boolean_t mcast_opt = B_TRUE;
6322 mcast_record_t fmode;
6323 int (*optfn)(conn_t *, boolean_t, const in6_addr_t *,
6324 ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *);
6325
6326 switch (name) {
6327 case IP_ADD_MEMBERSHIP:
6328 case IPV6_JOIN_GROUP:
6329 mcast_opt = B_FALSE;
6330 /* FALLTHRU */
6331 case MCAST_JOIN_GROUP:
6332 fmode = MODE_IS_EXCLUDE;
6333 optfn = ip_opt_add_group;
6334 break;
6335
6336 case IP_DROP_MEMBERSHIP:
6337 case IPV6_LEAVE_GROUP:
6338 mcast_opt = B_FALSE;
6339 /* FALLTHRU */
6340 case MCAST_LEAVE_GROUP:
6341 fmode = MODE_IS_INCLUDE;
6342 optfn = ip_opt_delete_group;
6343 break;
6344 default:
6345 ASSERT(0);
6346 }
6347
6348 if (mcast_opt) {
6349 struct sockaddr_in *sin;
6350 struct sockaddr_in6 *sin6;
6351
6352 greqp = (struct group_req *)i1;
6353 if (greqp->gr_group.ss_family == AF_INET) {
6354 sin = (struct sockaddr_in *)&(greqp->gr_group);
6355 IN6_INADDR_TO_V4MAPPED(&sin->sin_addr, &v6group);
6356 } else {
6357 if (!inet6)
6358 return (EINVAL); /* Not on INET socket */
6359
6360 sin6 = (struct sockaddr_in6 *)&(greqp->gr_group);
6361 v6group = sin6->sin6_addr;
6362 }
6363 ifaddr = INADDR_ANY;
6364 ifindex = greqp->gr_interface;
6365 } else if (inet6) {
6366 v6_mreqp = (struct ipv6_mreq *)i1;
6367 v6group = v6_mreqp->ipv6mr_multiaddr;
6368 ifaddr = INADDR_ANY;
6369 ifindex = v6_mreqp->ipv6mr_interface;
6370 } else {
6371 v4_mreqp = (struct ip_mreq *)i1;
6372 IN6_INADDR_TO_V4MAPPED(&v4_mreqp->imr_multiaddr, &v6group);
6373 ifaddr = (ipaddr_t)v4_mreqp->imr_interface.s_addr;
6374 ifindex = 0;
6375 }
6376
6377 /*
6378 * In the multirouting case, we need to replicate
6379 * the request on all interfaces that will take part
6380 * in replication. We do so because multirouting is
6381 * reflective, thus we will probably receive multi-
6382 * casts on those interfaces.
6383 * The ip_multirt_apply_membership() succeeds if
6384 * the operation succeeds on at least one interface.
6385 */
6386 if (IN6_IS_ADDR_V4MAPPED(&v6group)) {
6387 ipaddr_t group;
6388
6389 IN6_V4MAPPED_TO_IPADDR(&v6group, group);
6390
6391 ire = ire_ftable_lookup_v4(group, IP_HOST_MASK, 0,
6392 IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL,
6393 MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL);
6394 } else {
6395 ire = ire_ftable_lookup_v6(&v6group, &ipv6_all_ones, 0,
6396 IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL,
6397 MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL);
6398 }
6399 if (ire != NULL) {
6400 if (ire->ire_flags & RTF_MULTIRT) {
6401 error = ip_multirt_apply_membership(optfn, ire, connp,
6402 checkonly, &v6group, fmode, &ipv6_all_zeros);
6403 done = B_TRUE;
6404 }
6405 ire_refrele(ire);
6406 }
6407
6408 if (!done) {
6409 error = optfn(connp, checkonly, &v6group, ifaddr, ifindex,
6410 fmode, &ipv6_all_zeros);
6411 }
6412 return (error);
6413 }
6414
6415 /*
6416 * Set socket options for joining and leaving multicast groups
6417 * for specific sources.
6418 * Common to IPv4 and IPv6; inet6 indicates the type of socket.
6419 * The caller has already check that the option name is consistent with
6420 * the address family of the socket.
6421 */
6422 int
6423 ip_opt_set_multicast_sources(conn_t *connp, t_scalar_t name,
6424 uchar_t *invalp, boolean_t inet6, boolean_t checkonly)
6425 {
6426 int *i1 = (int *)invalp;
6427 int error = 0;
6428 ip_stack_t *ipst = connp->conn_netstack->netstack_ip;
6429 struct ip_mreq_source *imreqp;
6430 struct group_source_req *gsreqp;
6431 in6_addr_t v6group, v6src;
6432 uint32_t ifindex;
6433 ipaddr_t ifaddr;
6434 boolean_t mcast_opt = B_TRUE;
6435 mcast_record_t fmode;
6436 ire_t *ire;
6437 boolean_t done = B_FALSE;
6438 int (*optfn)(conn_t *, boolean_t, const in6_addr_t *,
6439 ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *);
6440
6441 switch (name) {
6442 case IP_BLOCK_SOURCE:
6443 mcast_opt = B_FALSE;
6444 /* FALLTHRU */
6445 case MCAST_BLOCK_SOURCE:
6446 fmode = MODE_IS_EXCLUDE;
6447 optfn = ip_opt_add_group;
6448 break;
6449
6450 case IP_UNBLOCK_SOURCE:
6451 mcast_opt = B_FALSE;
6452 /* FALLTHRU */
6453 case MCAST_UNBLOCK_SOURCE:
6454 fmode = MODE_IS_EXCLUDE;
6455 optfn = ip_opt_delete_group;
6456 break;
6457
6458 case IP_ADD_SOURCE_MEMBERSHIP:
6459 mcast_opt = B_FALSE;
6460 /* FALLTHRU */
6461 case MCAST_JOIN_SOURCE_GROUP:
6462 fmode = MODE_IS_INCLUDE;
6463 optfn = ip_opt_add_group;
6464 break;
6465
6466 case IP_DROP_SOURCE_MEMBERSHIP:
6467 mcast_opt = B_FALSE;
6468 /* FALLTHRU */
6469 case MCAST_LEAVE_SOURCE_GROUP:
6470 fmode = MODE_IS_INCLUDE;
6471 optfn = ip_opt_delete_group;
6472 break;
6473 default:
6474 ASSERT(0);
6475 }
6476
6477 if (mcast_opt) {
6478 gsreqp = (struct group_source_req *)i1;
6479 ifindex = gsreqp->gsr_interface;
6480 if (gsreqp->gsr_group.ss_family == AF_INET) {
6481 struct sockaddr_in *s;
6482 s = (struct sockaddr_in *)&gsreqp->gsr_group;
6483 IN6_INADDR_TO_V4MAPPED(&s->sin_addr, &v6group);
6484 s = (struct sockaddr_in *)&gsreqp->gsr_source;
6485 IN6_INADDR_TO_V4MAPPED(&s->sin_addr, &v6src);
6486 } else {
6487 struct sockaddr_in6 *s6;
6488
6489 if (!inet6)
6490 return (EINVAL); /* Not on INET socket */
6491
6492 s6 = (struct sockaddr_in6 *)&gsreqp->gsr_group;
6493 v6group = s6->sin6_addr;
6494 s6 = (struct sockaddr_in6 *)&gsreqp->gsr_source;
6495 v6src = s6->sin6_addr;
6496 }
6497 ifaddr = INADDR_ANY;
6498 } else {
6499 imreqp = (struct ip_mreq_source *)i1;
6500 IN6_INADDR_TO_V4MAPPED(&imreqp->imr_multiaddr, &v6group);
6501 IN6_INADDR_TO_V4MAPPED(&imreqp->imr_sourceaddr, &v6src);
6502 ifaddr = (ipaddr_t)imreqp->imr_interface.s_addr;
6503 ifindex = 0;
6504 }
6505
6506 /*
6507 * Handle src being mapped INADDR_ANY by changing it to unspecified.
6508 */
6509 if (IN6_IS_ADDR_V4MAPPED_ANY(&v6src))
6510 v6src = ipv6_all_zeros;
6511
6512 /*
6513 * In the multirouting case, we need to replicate
6514 * the request as noted in the mcast cases above.
6515 */
6516 if (IN6_IS_ADDR_V4MAPPED(&v6group)) {
6517 ipaddr_t group;
6518
6519 IN6_V4MAPPED_TO_IPADDR(&v6group, group);
6520
6521 ire = ire_ftable_lookup_v4(group, IP_HOST_MASK, 0,
6522 IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL,
6523 MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL);
6524 } else {
6525 ire = ire_ftable_lookup_v6(&v6group, &ipv6_all_ones, 0,
6526 IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL,
6527 MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL);
6528 }
6529 if (ire != NULL) {
6530 if (ire->ire_flags & RTF_MULTIRT) {
6531 error = ip_multirt_apply_membership(optfn, ire, connp,
6532 checkonly, &v6group, fmode, &v6src);
6533 done = B_TRUE;
6534 }
6535 ire_refrele(ire);
6536 }
6537 if (!done) {
6538 error = optfn(connp, checkonly, &v6group, ifaddr, ifindex,
6539 fmode, &v6src);
6540 }
6541 return (error);
6542 }
6543
6544 /*
6545 * Given a destination address and a pointer to where to put the information
6546 * this routine fills in the mtuinfo.
6547 * The socket must be connected.
6548 * For sctp conn_faddr is the primary address.
6549 */
6550 int
6551 ip_fill_mtuinfo(conn_t *connp, ip_xmit_attr_t *ixa, struct ip6_mtuinfo *mtuinfo)
6552 {
6553 uint32_t pmtu = IP_MAXPACKET;
6554 uint_t scopeid;
6555
6556 if (IN6_IS_ADDR_UNSPECIFIED(&connp->conn_faddr_v6))
6557 return (-1);
6558
6559 /* In case we never sent or called ip_set_destination_v4/v6 */
6560 if (ixa->ixa_ire != NULL)
6561 pmtu = ip_get_pmtu(ixa);
6562
6563 if (ixa->ixa_flags & IXAF_SCOPEID_SET)
6564 scopeid = ixa->ixa_scopeid;
6565 else
6566 scopeid = 0;
6567
6568 bzero(mtuinfo, sizeof (*mtuinfo));
6569 mtuinfo->ip6m_addr.sin6_family = AF_INET6;
6570 mtuinfo->ip6m_addr.sin6_port = connp->conn_fport;
6571 mtuinfo->ip6m_addr.sin6_addr = connp->conn_faddr_v6;
6572 mtuinfo->ip6m_addr.sin6_scope_id = scopeid;
6573 mtuinfo->ip6m_mtu = pmtu;
6574
6575 return (sizeof (struct ip6_mtuinfo));
6576 }
6577
6578 /*
6579 * When the src multihoming is changed from weak to [strong, preferred]
6580 * ip_ire_rebind_walker is called to walk the list of all ire_t entries
6581 * and identify routes that were created by user-applications in the
6582 * unbound state (i.e., without RTA_IFP), and for which an ire_ill is not
6583 * currently defined. These routes are then 'rebound', i.e., their ire_ill
6584 * is selected by finding an interface route for the gateway.
6585 */
6586 /* ARGSUSED */
6587 void
6588 ip_ire_rebind_walker(ire_t *ire, void *notused)
6589 {
6590 if (!ire->ire_unbound || ire->ire_ill != NULL)
6591 return;
6592 ire_rebind(ire);
6593 ire_delete(ire);
6594 }
6595
6596 /*
6597 * When the src multihoming is changed from [strong, preferred] to weak,
6598 * ip_ire_unbind_walker is called to walk the list of all ire_t entries, and
6599 * set any entries that were created by user-applications in the unbound state
6600 * (i.e., without RTA_IFP) back to having a NULL ire_ill.
6601 */
6602 /* ARGSUSED */
6603 void
6604 ip_ire_unbind_walker(ire_t *ire, void *notused)
6605 {
6606 ire_t *new_ire;
6607
6608 if (!ire->ire_unbound || ire->ire_ill == NULL)
6609 return;
6610 if (ire->ire_ipversion == IPV6_VERSION) {
6611 new_ire = ire_create_v6(&ire->ire_addr_v6, &ire->ire_mask_v6,
6612 &ire->ire_gateway_addr_v6, ire->ire_type, NULL,
6613 ire->ire_zoneid, ire->ire_flags, NULL, ire->ire_ipst);
6614 } else {
6615 new_ire = ire_create((uchar_t *)&ire->ire_addr,
6616 (uchar_t *)&ire->ire_mask,
6617 (uchar_t *)&ire->ire_gateway_addr, ire->ire_type, NULL,
6618 ire->ire_zoneid, ire->ire_flags, NULL, ire->ire_ipst);
6619 }
6620 if (new_ire == NULL)
6621 return;
6622 new_ire->ire_unbound = B_TRUE;
6623 /*
6624 * The bound ire must first be deleted so that we don't return
6625 * the existing one on the attempt to add the unbound new_ire.
6626 */
6627 ire_delete(ire);
6628 new_ire = ire_add(new_ire);
6629 if (new_ire != NULL)
6630 ire_refrele(new_ire);
6631 }
6632
6633 /*
6634 * When the settings of ip*_strict_src_multihoming tunables are changed,
6635 * all cached routes need to be recomputed. This recomputation needs to be
6636 * done when going from weaker to stronger modes so that the cached ire
6637 * for the connection does not violate the current ip*_strict_src_multihoming
6638 * setting. It also needs to be done when going from stronger to weaker modes,
6639 * so that we fall back to matching on the longest-matching-route (as opposed
6640 * to a shorter match that may have been selected in the strong mode
6641 * to satisfy src_multihoming settings).
6642 *
6643 * The cached ixa_ire entires for all conn_t entries are marked as
6644 * "verify" so that they will be recomputed for the next packet.
6645 */
6646 void
6647 conn_ire_revalidate(conn_t *connp, void *arg)
6648 {
6649 boolean_t isv6 = (boolean_t)arg;
6650
6651 if ((isv6 && connp->conn_ipversion != IPV6_VERSION) ||
6652 (!isv6 && connp->conn_ipversion != IPV4_VERSION))
6653 return;
6654 connp->conn_ixa->ixa_ire_generation = IRE_GENERATION_VERIFY;
6655 }
6656
6657 /*
6658 * Handles both IPv4 and IPv6 reassembly - doing the out-of-order cases,
6659 * When an ipf is passed here for the first time, if
6660 * we already have in-order fragments on the queue, we convert from the fast-
6661 * path reassembly scheme to the hard-case scheme. From then on, additional
6662 * fragments are reassembled here. We keep track of the start and end offsets
6663 * of each piece, and the number of holes in the chain. When the hole count
6664 * goes to zero, we are done!
6665 *
6666 * The ipf_count will be updated to account for any mblk(s) added (pointed to
6667 * by mp) or subtracted (freeb()ed dups), upon return the caller must update
6668 * ipfb_count and ill_frag_count by the difference of ipf_count before and
6669 * after the call to ip_reassemble().
6670 */
6671 int
6672 ip_reassemble(mblk_t *mp, ipf_t *ipf, uint_t start, boolean_t more, ill_t *ill,
6673 size_t msg_len)
6674 {
6675 uint_t end;
6676 mblk_t *next_mp;
6677 mblk_t *mp1;
6678 uint_t offset;
6679 boolean_t incr_dups = B_TRUE;
6680 boolean_t offset_zero_seen = B_FALSE;
6681 boolean_t pkt_boundary_checked = B_FALSE;
6682
6683 /* If start == 0 then ipf_nf_hdr_len has to be set. */
6684 ASSERT(start != 0 || ipf->ipf_nf_hdr_len != 0);
6685
6686 /* Add in byte count */
6687 ipf->ipf_count += msg_len;
6688 if (ipf->ipf_end) {
6689 /*
6690 * We were part way through in-order reassembly, but now there
6691 * is a hole. We walk through messages already queued, and
6692 * mark them for hard case reassembly. We know that up till
6693 * now they were in order starting from offset zero.
6694 */
6695 offset = 0;
6696 for (mp1 = ipf->ipf_mp->b_cont; mp1; mp1 = mp1->b_cont) {
6697 IP_REASS_SET_START(mp1, offset);
6698 if (offset == 0) {
6699 ASSERT(ipf->ipf_nf_hdr_len != 0);
6700 offset = -ipf->ipf_nf_hdr_len;
6701 }
6702 offset += mp1->b_wptr - mp1->b_rptr;
6703 IP_REASS_SET_END(mp1, offset);
6704 }
6705 /* One hole at the end. */
6706 ipf->ipf_hole_cnt = 1;
6707 /* Brand it as a hard case, forever. */
6708 ipf->ipf_end = 0;
6709 }
6710 /* Walk through all the new pieces. */
6711 do {
6712 end = start + (mp->b_wptr - mp->b_rptr);
6713 /*
6714 * If start is 0, decrease 'end' only for the first mblk of
6715 * the fragment. Otherwise 'end' can get wrong value in the
6716 * second pass of the loop if first mblk is exactly the
6717 * size of ipf_nf_hdr_len.
6718 */
6719 if (start == 0 && !offset_zero_seen) {
6720 /* First segment */
6721 ASSERT(ipf->ipf_nf_hdr_len != 0);
6722 end -= ipf->ipf_nf_hdr_len;
6723 offset_zero_seen = B_TRUE;
6724 }
6725 next_mp = mp->b_cont;
6726 /*
6727 * We are checking to see if there is any interesing data
6728 * to process. If there isn't and the mblk isn't the
6729 * one which carries the unfragmentable header then we
6730 * drop it. It's possible to have just the unfragmentable
6731 * header come through without any data. That needs to be
6732 * saved.
6733 *
6734 * If the assert at the top of this function holds then the
6735 * term "ipf->ipf_nf_hdr_len != 0" isn't needed. This code
6736 * is infrequently traveled enough that the test is left in
6737 * to protect against future code changes which break that
6738 * invariant.
6739 */
6740 if (start == end && start != 0 && ipf->ipf_nf_hdr_len != 0) {
6741 /* Empty. Blast it. */
6742 IP_REASS_SET_START(mp, 0);
6743 IP_REASS_SET_END(mp, 0);
6744 /*
6745 * If the ipf points to the mblk we are about to free,
6746 * update ipf to point to the next mblk (or NULL
6747 * if none).
6748 */
6749 if (ipf->ipf_mp->b_cont == mp)
6750 ipf->ipf_mp->b_cont = next_mp;
6751 freeb(mp);
6752 continue;
6753 }
6754 mp->b_cont = NULL;
6755 IP_REASS_SET_START(mp, start);
6756 IP_REASS_SET_END(mp, end);
6757 if (!ipf->ipf_tail_mp) {
6758 ipf->ipf_tail_mp = mp;
6759 ipf->ipf_mp->b_cont = mp;
6760 if (start == 0 || !more) {
6761 ipf->ipf_hole_cnt = 1;
6762 /*
6763 * if the first fragment comes in more than one
6764 * mblk, this loop will be executed for each
6765 * mblk. Need to adjust hole count so exiting
6766 * this routine will leave hole count at 1.
6767 */
6768 if (next_mp)
6769 ipf->ipf_hole_cnt++;
6770 } else
6771 ipf->ipf_hole_cnt = 2;
6772 continue;
6773 } else if (ipf->ipf_last_frag_seen && !more &&
6774 !pkt_boundary_checked) {
6775 /*
6776 * We check datagram boundary only if this fragment
6777 * claims to be the last fragment and we have seen a
6778 * last fragment in the past too. We do this only
6779 * once for a given fragment.
6780 *
6781 * start cannot be 0 here as fragments with start=0
6782 * and MF=0 gets handled as a complete packet. These
6783 * fragments should not reach here.
6784 */
6785
6786 if (start + msgdsize(mp) !=
6787 IP_REASS_END(ipf->ipf_tail_mp)) {
6788 /*
6789 * We have two fragments both of which claim
6790 * to be the last fragment but gives conflicting
6791 * information about the whole datagram size.
6792 * Something fishy is going on. Drop the
6793 * fragment and free up the reassembly list.
6794 */
6795 return (IP_REASS_FAILED);
6796 }
6797
6798 /*
6799 * We shouldn't come to this code block again for this
6800 * particular fragment.
6801 */
6802 pkt_boundary_checked = B_TRUE;
6803 }
6804
6805 /* New stuff at or beyond tail? */
6806 offset = IP_REASS_END(ipf->ipf_tail_mp);
6807 if (start >= offset) {
6808 if (ipf->ipf_last_frag_seen) {
6809 /* current fragment is beyond last fragment */
6810 return (IP_REASS_FAILED);
6811 }
6812 /* Link it on end. */
6813 ipf->ipf_tail_mp->b_cont = mp;
6814 ipf->ipf_tail_mp = mp;
6815 if (more) {
6816 if (start != offset)
6817 ipf->ipf_hole_cnt++;
6818 } else if (start == offset && next_mp == NULL)
6819 ipf->ipf_hole_cnt--;
6820 continue;
6821 }
6822 mp1 = ipf->ipf_mp->b_cont;
6823 offset = IP_REASS_START(mp1);
6824 /* New stuff at the front? */
6825 if (start < offset) {
6826 if (start == 0) {
6827 if (end >= offset) {
6828 /* Nailed the hole at the begining. */
6829 ipf->ipf_hole_cnt--;
6830 }
6831 } else if (end < offset) {
6832 /*
6833 * A hole, stuff, and a hole where there used
6834 * to be just a hole.
6835 */
6836 ipf->ipf_hole_cnt++;
6837 }
6838 mp->b_cont = mp1;
6839 /* Check for overlap. */
6840 while (end > offset) {
6841 if (end < IP_REASS_END(mp1)) {
6842 mp->b_wptr -= end - offset;
6843 IP_REASS_SET_END(mp, offset);
6844 BUMP_MIB(ill->ill_ip_mib,
6845 ipIfStatsReasmPartDups);
6846 break;
6847 }
6848 /* Did we cover another hole? */
6849 if ((mp1->b_cont &&
6850 IP_REASS_END(mp1) !=
6851 IP_REASS_START(mp1->b_cont) &&
6852 end >= IP_REASS_START(mp1->b_cont)) ||
6853 (!ipf->ipf_last_frag_seen && !more)) {
6854 ipf->ipf_hole_cnt--;
6855 }
6856 /* Clip out mp1. */
6857 if ((mp->b_cont = mp1->b_cont) == NULL) {
6858 /*
6859 * After clipping out mp1, this guy
6860 * is now hanging off the end.
6861 */
6862 ipf->ipf_tail_mp = mp;
6863 }
6864 IP_REASS_SET_START(mp1, 0);
6865 IP_REASS_SET_END(mp1, 0);
6866 /* Subtract byte count */
6867 ipf->ipf_count -= mp1->b_datap->db_lim -
6868 mp1->b_datap->db_base;
6869 freeb(mp1);
6870 BUMP_MIB(ill->ill_ip_mib,
6871 ipIfStatsReasmPartDups);
6872 mp1 = mp->b_cont;
6873 if (!mp1)
6874 break;
6875 offset = IP_REASS_START(mp1);
6876 }
6877 ipf->ipf_mp->b_cont = mp;
6878 continue;
6879 }
6880 /*
6881 * The new piece starts somewhere between the start of the head
6882 * and before the end of the tail.
6883 */
6884 for (; mp1; mp1 = mp1->b_cont) {
6885 offset = IP_REASS_END(mp1);
6886 if (start < offset) {
6887 if (end <= offset) {
6888 /* Nothing new. */
6889 IP_REASS_SET_START(mp, 0);
6890 IP_REASS_SET_END(mp, 0);
6891 /* Subtract byte count */
6892 ipf->ipf_count -= mp->b_datap->db_lim -
6893 mp->b_datap->db_base;
6894 if (incr_dups) {
6895 ipf->ipf_num_dups++;
6896 incr_dups = B_FALSE;
6897 }
6898 freeb(mp);
6899 BUMP_MIB(ill->ill_ip_mib,
6900 ipIfStatsReasmDuplicates);
6901 break;
6902 }
6903 /*
6904 * Trim redundant stuff off beginning of new
6905 * piece.
6906 */
6907 IP_REASS_SET_START(mp, offset);
6908 mp->b_rptr += offset - start;
6909 BUMP_MIB(ill->ill_ip_mib,
6910 ipIfStatsReasmPartDups);
6911 start = offset;
6912 if (!mp1->b_cont) {
6913 /*
6914 * After trimming, this guy is now
6915 * hanging off the end.
6916 */
6917 mp1->b_cont = mp;
6918 ipf->ipf_tail_mp = mp;
6919 if (!more) {
6920 ipf->ipf_hole_cnt--;
6921 }
6922 break;
6923 }
6924 }
6925 if (start >= IP_REASS_START(mp1->b_cont))
6926 continue;
6927 /* Fill a hole */
6928 if (start > offset)
6929 ipf->ipf_hole_cnt++;
6930 mp->b_cont = mp1->b_cont;
6931 mp1->b_cont = mp;
6932 mp1 = mp->b_cont;
6933 offset = IP_REASS_START(mp1);
6934 if (end >= offset) {
6935 ipf->ipf_hole_cnt--;
6936 /* Check for overlap. */
6937 while (end > offset) {
6938 if (end < IP_REASS_END(mp1)) {
6939 mp->b_wptr -= end - offset;
6940 IP_REASS_SET_END(mp, offset);
6941 /*
6942 * TODO we might bump
6943 * this up twice if there is
6944 * overlap at both ends.
6945 */
6946 BUMP_MIB(ill->ill_ip_mib,
6947 ipIfStatsReasmPartDups);
6948 break;
6949 }
6950 /* Did we cover another hole? */
6951 if ((mp1->b_cont &&
6952 IP_REASS_END(mp1)
6953 != IP_REASS_START(mp1->b_cont) &&
6954 end >=
6955 IP_REASS_START(mp1->b_cont)) ||
6956 (!ipf->ipf_last_frag_seen &&
6957 !more)) {
6958 ipf->ipf_hole_cnt--;
6959 }
6960 /* Clip out mp1. */
6961 if ((mp->b_cont = mp1->b_cont) ==
6962 NULL) {
6963 /*
6964 * After clipping out mp1,
6965 * this guy is now hanging
6966 * off the end.
6967 */
6968 ipf->ipf_tail_mp = mp;
6969 }
6970 IP_REASS_SET_START(mp1, 0);
6971 IP_REASS_SET_END(mp1, 0);
6972 /* Subtract byte count */
6973 ipf->ipf_count -=
6974 mp1->b_datap->db_lim -
6975 mp1->b_datap->db_base;
6976 freeb(mp1);
6977 BUMP_MIB(ill->ill_ip_mib,
6978 ipIfStatsReasmPartDups);
6979 mp1 = mp->b_cont;
6980 if (!mp1)
6981 break;
6982 offset = IP_REASS_START(mp1);
6983 }
6984 }
6985 break;
6986 }
6987 } while (start = end, mp = next_mp);
6988
6989 /* Fragment just processed could be the last one. Remember this fact */
6990 if (!more)
6991 ipf->ipf_last_frag_seen = B_TRUE;
6992
6993 /* Still got holes? */
6994 if (ipf->ipf_hole_cnt)
6995 return (IP_REASS_PARTIAL);
6996 /* Clean up overloaded fields to avoid upstream disasters. */
6997 for (mp1 = ipf->ipf_mp->b_cont; mp1; mp1 = mp1->b_cont) {
6998 IP_REASS_SET_START(mp1, 0);
6999 IP_REASS_SET_END(mp1, 0);
7000 }
7001 return (IP_REASS_COMPLETE);
7002 }
7003
7004 /*
7005 * Fragmentation reassembly. Each ILL has a hash table for
7006 * queuing packets undergoing reassembly for all IPIFs
7007 * associated with the ILL. The hash is based on the packet
7008 * IP ident field. The ILL frag hash table was allocated
7009 * as a timer block at the time the ILL was created. Whenever
7010 * there is anything on the reassembly queue, the timer will
7011 * be running. Returns the reassembled packet if reassembly completes.
7012 */
7013 mblk_t *
7014 ip_input_fragment(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira)
7015 {
7016 uint32_t frag_offset_flags;
7017 mblk_t *t_mp;
7018 ipaddr_t dst;
7019 uint8_t proto = ipha->ipha_protocol;
7020 uint32_t sum_val;
7021 uint16_t sum_flags;
7022 ipf_t *ipf;
7023 ipf_t **ipfp;
7024 ipfb_t *ipfb;
7025 uint16_t ident;
7026 uint32_t offset;
7027 ipaddr_t src;
7028 uint_t hdr_length;
7029 uint32_t end;
7030 mblk_t *mp1;
7031 mblk_t *tail_mp;
7032 size_t count;
7033 size_t msg_len;
7034 uint8_t ecn_info = 0;
7035 uint32_t packet_size;
7036 boolean_t pruned = B_FALSE;
7037 ill_t *ill = ira->ira_ill;
7038 ip_stack_t *ipst = ill->ill_ipst;
7039
7040 /*
7041 * Drop the fragmented as early as possible, if
7042 * we don't have resource(s) to re-assemble.
7043 */
7044 if (ipst->ips_ip_reass_queue_bytes == 0) {
7045 freemsg(mp);
7046 return (NULL);
7047 }
7048
7049 /* Check for fragmentation offset; return if there's none */
7050 if ((frag_offset_flags = ntohs(ipha->ipha_fragment_offset_and_flags) &
7051 (IPH_MF | IPH_OFFSET)) == 0)
7052 return (mp);
7053
7054 /*
7055 * We utilize hardware computed checksum info only for UDP since
7056 * IP fragmentation is a normal occurrence for the protocol. In
7057 * addition, checksum offload support for IP fragments carrying
7058 * UDP payload is commonly implemented across network adapters.
7059 */
7060 ASSERT(ira->ira_rill != NULL);
7061 if (proto == IPPROTO_UDP && dohwcksum &&
7062 ILL_HCKSUM_CAPABLE(ira->ira_rill) &&
7063 (DB_CKSUMFLAGS(mp) & (HCK_FULLCKSUM | HCK_PARTIALCKSUM))) {
7064 mblk_t *mp1 = mp->b_cont;
7065 int32_t len;
7066
7067 /* Record checksum information from the packet */
7068 sum_val = (uint32_t)DB_CKSUM16(mp);
7069 sum_flags = DB_CKSUMFLAGS(mp);
7070
7071 /* IP payload offset from beginning of mblk */
7072 offset = ((uchar_t *)ipha + IPH_HDR_LENGTH(ipha)) - mp->b_rptr;
7073
7074 if ((sum_flags & HCK_PARTIALCKSUM) &&
7075 (mp1 == NULL || mp1->b_cont == NULL) &&
7076 offset >= DB_CKSUMSTART(mp) &&
7077 ((len = offset - DB_CKSUMSTART(mp)) & 1) == 0) {
7078 uint32_t adj;
7079 /*
7080 * Partial checksum has been calculated by hardware
7081 * and attached to the packet; in addition, any
7082 * prepended extraneous data is even byte aligned.
7083 * If any such data exists, we adjust the checksum;
7084 * this would also handle any postpended data.
7085 */
7086 IP_ADJCKSUM_PARTIAL(mp->b_rptr + DB_CKSUMSTART(mp),
7087 mp, mp1, len, adj);
7088
7089 /* One's complement subtract extraneous checksum */
7090 if (adj >= sum_val)
7091 sum_val = ~(adj - sum_val) & 0xFFFF;
7092 else
7093 sum_val -= adj;
7094 }
7095 } else {
7096 sum_val = 0;
7097 sum_flags = 0;
7098 }
7099
7100 /* Clear hardware checksumming flag */
7101 DB_CKSUMFLAGS(mp) = 0;
7102
7103 ident = ipha->ipha_ident;
7104 offset = (frag_offset_flags << 3) & 0xFFFF;
7105 src = ipha->ipha_src;
7106 dst = ipha->ipha_dst;
7107 hdr_length = IPH_HDR_LENGTH(ipha);
7108 end = ntohs(ipha->ipha_length) - hdr_length;
7109
7110 /* If end == 0 then we have a packet with no data, so just free it */
7111 if (end == 0) {
7112 freemsg(mp);
7113 return (NULL);
7114 }
7115
7116 /* Record the ECN field info. */
7117 ecn_info = (ipha->ipha_type_of_service & 0x3);
7118 if (offset != 0) {
7119 /*
7120 * If this isn't the first piece, strip the header, and
7121 * add the offset to the end value.
7122 */
7123 mp->b_rptr += hdr_length;
7124 end += offset;
7125 }
7126
7127 /* Handle vnic loopback of fragments */
7128 if (mp->b_datap->db_ref > 2)
7129 msg_len = 0;
7130 else
7131 msg_len = MBLKSIZE(mp);
7132
7133 tail_mp = mp;
7134 while (tail_mp->b_cont != NULL) {
7135 tail_mp = tail_mp->b_cont;
7136 if (tail_mp->b_datap->db_ref <= 2)
7137 msg_len += MBLKSIZE(tail_mp);
7138 }
7139
7140 /* If the reassembly list for this ILL will get too big, prune it */
7141 if ((msg_len + sizeof (*ipf) + ill->ill_frag_count) >=
7142 ipst->ips_ip_reass_queue_bytes) {
7143 DTRACE_PROBE3(ip_reass_queue_bytes, uint_t, msg_len,
7144 uint_t, ill->ill_frag_count,
7145 uint_t, ipst->ips_ip_reass_queue_bytes);
7146 ill_frag_prune(ill,
7147 (ipst->ips_ip_reass_queue_bytes < msg_len) ? 0 :
7148 (ipst->ips_ip_reass_queue_bytes - msg_len));
7149 pruned = B_TRUE;
7150 }
7151
7152 ipfb = &ill->ill_frag_hash_tbl[ILL_FRAG_HASH(src, ident)];
7153 mutex_enter(&ipfb->ipfb_lock);
7154
7155 ipfp = &ipfb->ipfb_ipf;
7156 /* Try to find an existing fragment queue for this packet. */
7157 for (;;) {
7158 ipf = ipfp[0];
7159 if (ipf != NULL) {
7160 /*
7161 * It has to match on ident and src/dst address.
7162 */
7163 if (ipf->ipf_ident == ident &&
7164 ipf->ipf_src == src &&
7165 ipf->ipf_dst == dst &&
7166 ipf->ipf_protocol == proto) {
7167 /*
7168 * If we have received too many
7169 * duplicate fragments for this packet
7170 * free it.
7171 */
7172 if (ipf->ipf_num_dups > ip_max_frag_dups) {
7173 ill_frag_free_pkts(ill, ipfb, ipf, 1);
7174 freemsg(mp);
7175 mutex_exit(&ipfb->ipfb_lock);
7176 return (NULL);
7177 }
7178 /* Found it. */
7179 break;
7180 }
7181 ipfp = &ipf->ipf_hash_next;
7182 continue;
7183 }
7184
7185 /*
7186 * If we pruned the list, do we want to store this new
7187 * fragment?. We apply an optimization here based on the
7188 * fact that most fragments will be received in order.
7189 * So if the offset of this incoming fragment is zero,
7190 * it is the first fragment of a new packet. We will
7191 * keep it. Otherwise drop the fragment, as we have
7192 * probably pruned the packet already (since the
7193 * packet cannot be found).
7194 */
7195 if (pruned && offset != 0) {
7196 mutex_exit(&ipfb->ipfb_lock);
7197 freemsg(mp);
7198 return (NULL);
7199 }
7200
7201 if (ipfb->ipfb_frag_pkts >= MAX_FRAG_PKTS(ipst)) {
7202 /*
7203 * Too many fragmented packets in this hash
7204 * bucket. Free the oldest.
7205 */
7206 ill_frag_free_pkts(ill, ipfb, ipfb->ipfb_ipf, 1);
7207 }
7208
7209 /* New guy. Allocate a frag message. */
7210 mp1 = allocb(sizeof (*ipf), BPRI_MED);
7211 if (mp1 == NULL) {
7212 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
7213 ip_drop_input("ipIfStatsInDiscards", mp, ill);
7214 freemsg(mp);
7215 reass_done:
7216 mutex_exit(&ipfb->ipfb_lock);
7217 return (NULL);
7218 }
7219
7220 BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmReqds);
7221 mp1->b_cont = mp;
7222
7223 /* Initialize the fragment header. */
7224 ipf = (ipf_t *)mp1->b_rptr;
7225 ipf->ipf_mp = mp1;
7226 ipf->ipf_ptphn = ipfp;
7227 ipfp[0] = ipf;
7228 ipf->ipf_hash_next = NULL;
7229 ipf->ipf_ident = ident;
7230 ipf->ipf_protocol = proto;
7231 ipf->ipf_src = src;
7232 ipf->ipf_dst = dst;
7233 ipf->ipf_nf_hdr_len = 0;
7234 /* Record reassembly start time. */
7235 ipf->ipf_timestamp = gethrestime_sec();
7236 /* Record ipf generation and account for frag header */
7237 ipf->ipf_gen = ill->ill_ipf_gen++;
7238 ipf->ipf_count = MBLKSIZE(mp1);
7239 ipf->ipf_last_frag_seen = B_FALSE;
7240 ipf->ipf_ecn = ecn_info;
7241 ipf->ipf_num_dups = 0;
7242 ipfb->ipfb_frag_pkts++;
7243 ipf->ipf_checksum = 0;
7244 ipf->ipf_checksum_flags = 0;
7245
7246 /* Store checksum value in fragment header */
7247 if (sum_flags != 0) {
7248 sum_val = (sum_val & 0xFFFF) + (sum_val >> 16);
7249 sum_val = (sum_val & 0xFFFF) + (sum_val >> 16);
7250 ipf->ipf_checksum = sum_val;
7251 ipf->ipf_checksum_flags = sum_flags;
7252 }
7253
7254 /*
7255 * We handle reassembly two ways. In the easy case,
7256 * where all the fragments show up in order, we do
7257 * minimal bookkeeping, and just clip new pieces on
7258 * the end. If we ever see a hole, then we go off
7259 * to ip_reassemble which has to mark the pieces and
7260 * keep track of the number of holes, etc. Obviously,
7261 * the point of having both mechanisms is so we can
7262 * handle the easy case as efficiently as possible.
7263 */
7264 if (offset == 0) {
7265 /* Easy case, in-order reassembly so far. */
7266 ipf->ipf_count += msg_len;
7267 ipf->ipf_tail_mp = tail_mp;
7268 /*
7269 * Keep track of next expected offset in
7270 * ipf_end.
7271 */
7272 ipf->ipf_end = end;
7273 ipf->ipf_nf_hdr_len = hdr_length;
7274 } else {
7275 /* Hard case, hole at the beginning. */
7276 ipf->ipf_tail_mp = NULL;
7277 /*
7278 * ipf_end == 0 means that we have given up
7279 * on easy reassembly.
7280 */
7281 ipf->ipf_end = 0;
7282
7283 /* Forget checksum offload from now on */
7284 ipf->ipf_checksum_flags = 0;
7285
7286 /*
7287 * ipf_hole_cnt is set by ip_reassemble.
7288 * ipf_count is updated by ip_reassemble.
7289 * No need to check for return value here
7290 * as we don't expect reassembly to complete
7291 * or fail for the first fragment itself.
7292 */
7293 (void) ip_reassemble(mp, ipf,
7294 (frag_offset_flags & IPH_OFFSET) << 3,
7295 (frag_offset_flags & IPH_MF), ill, msg_len);
7296 }
7297 /* Update per ipfb and ill byte counts */
7298 ipfb->ipfb_count += ipf->ipf_count;
7299 ASSERT(ipfb->ipfb_count > 0); /* Wraparound */
7300 atomic_add_32(&ill->ill_frag_count, ipf->ipf_count);
7301 /* If the frag timer wasn't already going, start it. */
7302 mutex_enter(&ill->ill_lock);
7303 ill_frag_timer_start(ill);
7304 mutex_exit(&ill->ill_lock);
7305 goto reass_done;
7306 }
7307
7308 /*
7309 * If the packet's flag has changed (it could be coming up
7310 * from an interface different than the previous, therefore
7311 * possibly different checksum capability), then forget about
7312 * any stored checksum states. Otherwise add the value to
7313 * the existing one stored in the fragment header.
7314 */
7315 if (sum_flags != 0 && sum_flags == ipf->ipf_checksum_flags) {
7316 sum_val += ipf->ipf_checksum;
7317 sum_val = (sum_val & 0xFFFF) + (sum_val >> 16);
7318 sum_val = (sum_val & 0xFFFF) + (sum_val >> 16);
7319 ipf->ipf_checksum = sum_val;
7320 } else if (ipf->ipf_checksum_flags != 0) {
7321 /* Forget checksum offload from now on */
7322 ipf->ipf_checksum_flags = 0;
7323 }
7324
7325 /*
7326 * We have a new piece of a datagram which is already being
7327 * reassembled. Update the ECN info if all IP fragments
7328 * are ECN capable. If there is one which is not, clear
7329 * all the info. If there is at least one which has CE
7330 * code point, IP needs to report that up to transport.
7331 */
7332 if (ecn_info != IPH_ECN_NECT && ipf->ipf_ecn != IPH_ECN_NECT) {
7333 if (ecn_info == IPH_ECN_CE)
7334 ipf->ipf_ecn = IPH_ECN_CE;
7335 } else {
7336 ipf->ipf_ecn = IPH_ECN_NECT;
7337 }
7338 if (offset && ipf->ipf_end == offset) {
7339 /* The new fragment fits at the end */
7340 ipf->ipf_tail_mp->b_cont = mp;
7341 /* Update the byte count */
7342 ipf->ipf_count += msg_len;
7343 /* Update per ipfb and ill byte counts */
7344 ipfb->ipfb_count += msg_len;
7345 ASSERT(ipfb->ipfb_count > 0); /* Wraparound */
7346 atomic_add_32(&ill->ill_frag_count, msg_len);
7347 if (frag_offset_flags & IPH_MF) {
7348 /* More to come. */
7349 ipf->ipf_end = end;
7350 ipf->ipf_tail_mp = tail_mp;
7351 goto reass_done;
7352 }
7353 } else {
7354 /* Go do the hard cases. */
7355 int ret;
7356
7357 if (offset == 0)
7358 ipf->ipf_nf_hdr_len = hdr_length;
7359
7360 /* Save current byte count */
7361 count = ipf->ipf_count;
7362 ret = ip_reassemble(mp, ipf,
7363 (frag_offset_flags & IPH_OFFSET) << 3,
7364 (frag_offset_flags & IPH_MF), ill, msg_len);
7365 /* Count of bytes added and subtracted (freeb()ed) */
7366 count = ipf->ipf_count - count;
7367 if (count) {
7368 /* Update per ipfb and ill byte counts */
7369 ipfb->ipfb_count += count;
7370 ASSERT(ipfb->ipfb_count > 0); /* Wraparound */
7371 atomic_add_32(&ill->ill_frag_count, count);
7372 }
7373 if (ret == IP_REASS_PARTIAL) {
7374 goto reass_done;
7375 } else if (ret == IP_REASS_FAILED) {
7376 /* Reassembly failed. Free up all resources */
7377 ill_frag_free_pkts(ill, ipfb, ipf, 1);
7378 for (t_mp = mp; t_mp != NULL; t_mp = t_mp->b_cont) {
7379 IP_REASS_SET_START(t_mp, 0);
7380 IP_REASS_SET_END(t_mp, 0);
7381 }
7382 freemsg(mp);
7383 goto reass_done;
7384 }
7385 /* We will reach here iff 'ret' is IP_REASS_COMPLETE */
7386 }
7387 /*
7388 * We have completed reassembly. Unhook the frag header from
7389 * the reassembly list.
7390 *
7391 * Before we free the frag header, record the ECN info
7392 * to report back to the transport.
7393 */
7394 ecn_info = ipf->ipf_ecn;
7395 BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmOKs);
7396 ipfp = ipf->ipf_ptphn;
7397
7398 /* We need to supply these to caller */
7399 if ((sum_flags = ipf->ipf_checksum_flags) != 0)
7400 sum_val = ipf->ipf_checksum;
7401 else
7402 sum_val = 0;
7403
7404 mp1 = ipf->ipf_mp;
7405 count = ipf->ipf_count;
7406 ipf = ipf->ipf_hash_next;
7407 if (ipf != NULL)
7408 ipf->ipf_ptphn = ipfp;
7409 ipfp[0] = ipf;
7410 atomic_add_32(&ill->ill_frag_count, -count);
7411 ASSERT(ipfb->ipfb_count >= count);
7412 ipfb->ipfb_count -= count;
7413 ipfb->ipfb_frag_pkts--;
7414 mutex_exit(&ipfb->ipfb_lock);
7415 /* Ditch the frag header. */
7416 mp = mp1->b_cont;
7417
7418 freeb(mp1);
7419
7420 /* Restore original IP length in header. */
7421 packet_size = (uint32_t)msgdsize(mp);
7422 if (packet_size > IP_MAXPACKET) {
7423 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7424 ip_drop_input("Reassembled packet too large", mp, ill);
7425 freemsg(mp);
7426 return (NULL);
7427 }
7428
7429 if (DB_REF(mp) > 1) {
7430 mblk_t *mp2 = copymsg(mp);
7431
7432 if (mp2 == NULL) {
7433 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
7434 ip_drop_input("ipIfStatsInDiscards", mp, ill);
7435 freemsg(mp);
7436 return (NULL);
7437 }
7438 freemsg(mp);
7439 mp = mp2;
7440 }
7441 ipha = (ipha_t *)mp->b_rptr;
7442
7443 ipha->ipha_length = htons((uint16_t)packet_size);
7444 /* We're now complete, zip the frag state */
7445 ipha->ipha_fragment_offset_and_flags = 0;
7446 /* Record the ECN info. */
7447 ipha->ipha_type_of_service &= 0xFC;
7448 ipha->ipha_type_of_service |= ecn_info;
7449
7450 /* Update the receive attributes */
7451 ira->ira_pktlen = packet_size;
7452 ira->ira_ip_hdr_length = IPH_HDR_LENGTH(ipha);
7453
7454 /* Reassembly is successful; set checksum information in packet */
7455 DB_CKSUM16(mp) = (uint16_t)sum_val;
7456 DB_CKSUMFLAGS(mp) = sum_flags;
7457 DB_CKSUMSTART(mp) = ira->ira_ip_hdr_length;
7458
7459 return (mp);
7460 }
7461
7462 /*
7463 * Pullup function that should be used for IP input in order to
7464 * ensure we do not loose the L2 source address; we need the l2 source
7465 * address for IP_RECVSLLA and for ndp_input.
7466 *
7467 * We return either NULL or b_rptr.
7468 */
7469 void *
7470 ip_pullup(mblk_t *mp, ssize_t len, ip_recv_attr_t *ira)
7471 {
7472 ill_t *ill = ira->ira_ill;
7473
7474 if (ip_rput_pullups++ == 0) {
7475 (void) mi_strlog(ill->ill_rq, 1, SL_ERROR|SL_TRACE,
7476 "ip_pullup: %s forced us to "
7477 " pullup pkt, hdr len %ld, hdr addr %p",
7478 ill->ill_name, len, (void *)mp->b_rptr);
7479 }
7480 if (!(ira->ira_flags & IRAF_L2SRC_SET))
7481 ip_setl2src(mp, ira, ira->ira_rill);
7482 ASSERT(ira->ira_flags & IRAF_L2SRC_SET);
7483 if (!pullupmsg(mp, len))
7484 return (NULL);
7485 else
7486 return (mp->b_rptr);
7487 }
7488
7489 /*
7490 * Make sure ira_l2src has an address. If we don't have one fill with zeros.
7491 * When called from the ULP ira_rill will be NULL hence the caller has to
7492 * pass in the ill.
7493 */
7494 /* ARGSUSED */
7495 void
7496 ip_setl2src(mblk_t *mp, ip_recv_attr_t *ira, ill_t *ill)
7497 {
7498 const uchar_t *addr;
7499 int alen;
7500
7501 if (ira->ira_flags & IRAF_L2SRC_SET)
7502 return;
7503
7504 ASSERT(ill != NULL);
7505 alen = ill->ill_phys_addr_length;
7506 ASSERT(alen <= sizeof (ira->ira_l2src));
7507 if (ira->ira_mhip != NULL &&
7508 (addr = ira->ira_mhip->mhi_saddr) != NULL) {
7509 bcopy(addr, ira->ira_l2src, alen);
7510 } else if ((ira->ira_flags & IRAF_L2SRC_LOOPBACK) &&
7511 (addr = ill->ill_phys_addr) != NULL) {
7512 bcopy(addr, ira->ira_l2src, alen);
7513 } else {
7514 bzero(ira->ira_l2src, alen);
7515 }
7516 ira->ira_flags |= IRAF_L2SRC_SET;
7517 }
7518
7519 /*
7520 * check ip header length and align it.
7521 */
7522 mblk_t *
7523 ip_check_and_align_header(mblk_t *mp, uint_t min_size, ip_recv_attr_t *ira)
7524 {
7525 ill_t *ill = ira->ira_ill;
7526 ssize_t len;
7527
7528 len = MBLKL(mp);
7529
7530 if (!OK_32PTR(mp->b_rptr))
7531 IP_STAT(ill->ill_ipst, ip_notaligned);
7532 else
7533 IP_STAT(ill->ill_ipst, ip_recv_pullup);
7534
7535 /* Guard against bogus device drivers */
7536 if (len < 0) {
7537 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7538 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7539 freemsg(mp);
7540 return (NULL);
7541 }
7542
7543 if (len == 0) {
7544 /* GLD sometimes sends up mblk with b_rptr == b_wptr! */
7545 mblk_t *mp1 = mp->b_cont;
7546
7547 if (!(ira->ira_flags & IRAF_L2SRC_SET))
7548 ip_setl2src(mp, ira, ira->ira_rill);
7549 ASSERT(ira->ira_flags & IRAF_L2SRC_SET);
7550
7551 freeb(mp);
7552 mp = mp1;
7553 if (mp == NULL)
7554 return (NULL);
7555
7556 if (OK_32PTR(mp->b_rptr) && MBLKL(mp) >= min_size)
7557 return (mp);
7558 }
7559 if (ip_pullup(mp, min_size, ira) == NULL) {
7560 if (msgdsize(mp) < min_size) {
7561 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7562 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7563 } else {
7564 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
7565 ip_drop_input("ipIfStatsInDiscards", mp, ill);
7566 }
7567 freemsg(mp);
7568 return (NULL);
7569 }
7570 return (mp);
7571 }
7572
7573 /*
7574 * Common code for IPv4 and IPv6 to check and pullup multi-mblks
7575 */
7576 mblk_t *
7577 ip_check_length(mblk_t *mp, uchar_t *rptr, ssize_t len, uint_t pkt_len,
7578 uint_t min_size, ip_recv_attr_t *ira)
7579 {
7580 ill_t *ill = ira->ira_ill;
7581
7582 /*
7583 * Make sure we have data length consistent
7584 * with the IP header.
7585 */
7586 if (mp->b_cont == NULL) {
7587 /* pkt_len is based on ipha_len, not the mblk length */
7588 if (pkt_len < min_size) {
7589 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7590 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7591 freemsg(mp);
7592 return (NULL);
7593 }
7594 if (len < 0) {
7595 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
7596 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
7597 freemsg(mp);
7598 return (NULL);
7599 }
7600 /* Drop any pad */
7601 mp->b_wptr = rptr + pkt_len;
7602 } else if ((len += msgdsize(mp->b_cont)) != 0) {
7603 ASSERT(pkt_len >= min_size);
7604 if (pkt_len < min_size) {
7605 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7606 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7607 freemsg(mp);
7608 return (NULL);
7609 }
7610 if (len < 0) {
7611 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
7612 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
7613 freemsg(mp);
7614 return (NULL);
7615 }
7616 /* Drop any pad */
7617 (void) adjmsg(mp, -len);
7618 /*
7619 * adjmsg may have freed an mblk from the chain, hence
7620 * invalidate any hw checksum here. This will force IP to
7621 * calculate the checksum in sw, but only for this packet.
7622 */
7623 DB_CKSUMFLAGS(mp) = 0;
7624 IP_STAT(ill->ill_ipst, ip_multimblk);
7625 }
7626 return (mp);
7627 }
7628
7629 /*
7630 * Check that the IPv4 opt_len is consistent with the packet and pullup
7631 * the options.
7632 */
7633 mblk_t *
7634 ip_check_optlen(mblk_t *mp, ipha_t *ipha, uint_t opt_len, uint_t pkt_len,
7635 ip_recv_attr_t *ira)
7636 {
7637 ill_t *ill = ira->ira_ill;
7638 ssize_t len;
7639
7640 /* Assume no IPv6 packets arrive over the IPv4 queue */
7641 if (IPH_HDR_VERSION(ipha) != IPV4_VERSION) {
7642 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7643 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInWrongIPVersion);
7644 ip_drop_input("IPvN packet on IPv4 ill", mp, ill);
7645 freemsg(mp);
7646 return (NULL);
7647 }
7648
7649 if (opt_len > (15 - IP_SIMPLE_HDR_LENGTH_IN_WORDS)) {
7650 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7651 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7652 freemsg(mp);
7653 return (NULL);
7654 }
7655 /*
7656 * Recompute complete header length and make sure we
7657 * have access to all of it.
7658 */
7659 len = ((size_t)opt_len + IP_SIMPLE_HDR_LENGTH_IN_WORDS) << 2;
7660 if (len > (mp->b_wptr - mp->b_rptr)) {
7661 if (len > pkt_len) {
7662 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7663 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7664 freemsg(mp);
7665 return (NULL);
7666 }
7667 if (ip_pullup(mp, len, ira) == NULL) {
7668 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
7669 ip_drop_input("ipIfStatsInDiscards", mp, ill);
7670 freemsg(mp);
7671 return (NULL);
7672 }
7673 }
7674 return (mp);
7675 }
7676
7677 /*
7678 * Returns a new ire, or the same ire, or NULL.
7679 * If a different IRE is returned, then it is held; the caller
7680 * needs to release it.
7681 * In no case is there any hold/release on the ire argument.
7682 */
7683 ire_t *
7684 ip_check_multihome(void *addr, ire_t *ire, ill_t *ill)
7685 {
7686 ire_t *new_ire;
7687 ill_t *ire_ill;
7688 uint_t ifindex;
7689 ip_stack_t *ipst = ill->ill_ipst;
7690 boolean_t strict_check = B_FALSE;
7691
7692 /*
7693 * IPMP common case: if IRE and ILL are in the same group, there's no
7694 * issue (e.g. packet received on an underlying interface matched an
7695 * IRE_LOCAL on its associated group interface).
7696 */
7697 ASSERT(ire->ire_ill != NULL);
7698 if (IS_IN_SAME_ILLGRP(ill, ire->ire_ill))
7699 return (ire);
7700
7701 /*
7702 * Do another ire lookup here, using the ingress ill, to see if the
7703 * interface is in a usesrc group.
7704 * As long as the ills belong to the same group, we don't consider
7705 * them to be arriving on the wrong interface. Thus, if the switch
7706 * is doing inbound load spreading, we won't drop packets when the
7707 * ip*_strict_dst_multihoming switch is on.
7708 * We also need to check for IPIF_UNNUMBERED point2point interfaces
7709 * where the local address may not be unique. In this case we were
7710 * at the mercy of the initial ire lookup and the IRE_LOCAL it
7711 * actually returned. The new lookup, which is more specific, should
7712 * only find the IRE_LOCAL associated with the ingress ill if one
7713 * exists.
7714 */
7715 if (ire->ire_ipversion == IPV4_VERSION) {
7716 if (ipst->ips_ip_strict_dst_multihoming)
7717 strict_check = B_TRUE;
7718 new_ire = ire_ftable_lookup_v4(*((ipaddr_t *)addr), 0, 0,
7719 IRE_LOCAL, ill, ALL_ZONES, NULL,
7720 (MATCH_IRE_TYPE|MATCH_IRE_ILL), 0, ipst, NULL);
7721 } else {
7722 ASSERT(!IN6_IS_ADDR_MULTICAST((in6_addr_t *)addr));
7723 if (ipst->ips_ipv6_strict_dst_multihoming)
7724 strict_check = B_TRUE;
7725 new_ire = ire_ftable_lookup_v6((in6_addr_t *)addr, NULL, NULL,
7726 IRE_LOCAL, ill, ALL_ZONES, NULL,
7727 (MATCH_IRE_TYPE|MATCH_IRE_ILL), 0, ipst, NULL);
7728 }
7729 /*
7730 * If the same ire that was returned in ip_input() is found then this
7731 * is an indication that usesrc groups are in use. The packet
7732 * arrived on a different ill in the group than the one associated with
7733 * the destination address. If a different ire was found then the same
7734 * IP address must be hosted on multiple ills. This is possible with
7735 * unnumbered point2point interfaces. We switch to use this new ire in
7736 * order to have accurate interface statistics.
7737 */
7738 if (new_ire != NULL) {
7739 /* Note: held in one case but not the other? Caller handles */
7740 if (new_ire != ire)
7741 return (new_ire);
7742 /* Unchanged */
7743 ire_refrele(new_ire);
7744 return (ire);
7745 }
7746
7747 /*
7748 * Chase pointers once and store locally.
7749 */
7750 ASSERT(ire->ire_ill != NULL);
7751 ire_ill = ire->ire_ill;
7752 ifindex = ill->ill_usesrc_ifindex;
7753
7754 /*
7755 * Check if it's a legal address on the 'usesrc' interface.
7756 * For IPMP data addresses the IRE_LOCAL is the upper, hence we
7757 * can just check phyint_ifindex.
7758 */
7759 if (ifindex != 0 && ifindex == ire_ill->ill_phyint->phyint_ifindex) {
7760 return (ire);
7761 }
7762
7763 /*
7764 * If the ip*_strict_dst_multihoming switch is on then we can
7765 * only accept this packet if the interface is marked as routing.
7766 */
7767 if (!(strict_check))
7768 return (ire);
7769
7770 if ((ill->ill_flags & ire->ire_ill->ill_flags & ILLF_ROUTER) != 0) {
7771 return (ire);
7772 }
7773 return (NULL);
7774 }
7775
7776 /*
7777 * This function is used to construct a mac_header_info_s from a
7778 * DL_UNITDATA_IND message.
7779 * The address fields in the mhi structure points into the message,
7780 * thus the caller can't use those fields after freeing the message.
7781 *
7782 * We determine whether the packet received is a non-unicast packet
7783 * and in doing so, determine whether or not it is broadcast vs multicast.
7784 * For it to be a broadcast packet, we must have the appropriate mblk_t
7785 * hanging off the ill_t. If this is either not present or doesn't match
7786 * the destination mac address in the DL_UNITDATA_IND, the packet is deemed
7787 * to be multicast. Thus NICs that have no broadcast address (or no
7788 * capability for one, such as point to point links) cannot return as
7789 * the packet being broadcast.
7790 */
7791 void
7792 ip_dlur_to_mhi(ill_t *ill, mblk_t *mb, struct mac_header_info_s *mhip)
7793 {
7794 dl_unitdata_ind_t *ind = (dl_unitdata_ind_t *)mb->b_rptr;
7795 mblk_t *bmp;
7796 uint_t extra_offset;
7797
7798 bzero(mhip, sizeof (struct mac_header_info_s));
7799
7800 mhip->mhi_dsttype = MAC_ADDRTYPE_UNICAST;
7801
7802 if (ill->ill_sap_length < 0)
7803 extra_offset = 0;
7804 else
7805 extra_offset = ill->ill_sap_length;
7806
7807 mhip->mhi_daddr = (uchar_t *)ind + ind->dl_dest_addr_offset +
7808 extra_offset;
7809 mhip->mhi_saddr = (uchar_t *)ind + ind->dl_src_addr_offset +
7810 extra_offset;
7811
7812 if (!ind->dl_group_address)
7813 return;
7814
7815 /* Multicast or broadcast */
7816 mhip->mhi_dsttype = MAC_ADDRTYPE_MULTICAST;
7817
7818 if (ind->dl_dest_addr_offset > sizeof (*ind) &&
7819 ind->dl_dest_addr_offset + ind->dl_dest_addr_length < MBLKL(mb) &&
7820 (bmp = ill->ill_bcast_mp) != NULL) {
7821 dl_unitdata_req_t *dlur;
7822 uint8_t *bphys_addr;
7823
7824 dlur = (dl_unitdata_req_t *)bmp->b_rptr;
7825 bphys_addr = (uchar_t *)dlur + dlur->dl_dest_addr_offset +
7826 extra_offset;
7827
7828 if (bcmp(mhip->mhi_daddr, bphys_addr,
7829 ind->dl_dest_addr_length) == 0)
7830 mhip->mhi_dsttype = MAC_ADDRTYPE_BROADCAST;
7831 }
7832 }
7833
7834 /*
7835 * This function is used to construct a mac_header_info_s from a
7836 * M_DATA fastpath message from a DLPI driver.
7837 * The address fields in the mhi structure points into the message,
7838 * thus the caller can't use those fields after freeing the message.
7839 *
7840 * We determine whether the packet received is a non-unicast packet
7841 * and in doing so, determine whether or not it is broadcast vs multicast.
7842 * For it to be a broadcast packet, we must have the appropriate mblk_t
7843 * hanging off the ill_t. If this is either not present or doesn't match
7844 * the destination mac address in the DL_UNITDATA_IND, the packet is deemed
7845 * to be multicast. Thus NICs that have no broadcast address (or no
7846 * capability for one, such as point to point links) cannot return as
7847 * the packet being broadcast.
7848 */
7849 void
7850 ip_mdata_to_mhi(ill_t *ill, mblk_t *mp, struct mac_header_info_s *mhip)
7851 {
7852 mblk_t *bmp;
7853 struct ether_header *pether;
7854
7855 bzero(mhip, sizeof (struct mac_header_info_s));
7856
7857 mhip->mhi_dsttype = MAC_ADDRTYPE_UNICAST;
7858
7859 pether = (struct ether_header *)((char *)mp->b_rptr
7860 - sizeof (struct ether_header));
7861
7862 /*
7863 * Make sure the interface is an ethernet type, since we don't
7864 * know the header format for anything but Ethernet. Also make
7865 * sure we are pointing correctly above db_base.
7866 */
7867 if (ill->ill_type != IFT_ETHER)
7868 return;
7869
7870 retry:
7871 if ((uchar_t *)pether < mp->b_datap->db_base)
7872 return;
7873
7874 /* Is there a VLAN tag? */
7875 if (ill->ill_isv6) {
7876 if (pether->ether_type != htons(ETHERTYPE_IPV6)) {
7877 pether = (struct ether_header *)((char *)pether - 4);
7878 goto retry;
7879 }
7880 } else {
7881 if (pether->ether_type != htons(ETHERTYPE_IP)) {
7882 pether = (struct ether_header *)((char *)pether - 4);
7883 goto retry;
7884 }
7885 }
7886 mhip->mhi_daddr = (uchar_t *)&pether->ether_dhost;
7887 mhip->mhi_saddr = (uchar_t *)&pether->ether_shost;
7888
7889 if (!(mhip->mhi_daddr[0] & 0x01))
7890 return;
7891
7892 /* Multicast or broadcast */
7893 mhip->mhi_dsttype = MAC_ADDRTYPE_MULTICAST;
7894
7895 if ((bmp = ill->ill_bcast_mp) != NULL) {
7896 dl_unitdata_req_t *dlur;
7897 uint8_t *bphys_addr;
7898 uint_t addrlen;
7899
7900 dlur = (dl_unitdata_req_t *)bmp->b_rptr;
7901 addrlen = dlur->dl_dest_addr_length;
7902 if (ill->ill_sap_length < 0) {
7903 bphys_addr = (uchar_t *)dlur +
7904 dlur->dl_dest_addr_offset;
7905 addrlen += ill->ill_sap_length;
7906 } else {
7907 bphys_addr = (uchar_t *)dlur +
7908 dlur->dl_dest_addr_offset +
7909 ill->ill_sap_length;
7910 addrlen -= ill->ill_sap_length;
7911 }
7912 if (bcmp(mhip->mhi_daddr, bphys_addr, addrlen) == 0)
7913 mhip->mhi_dsttype = MAC_ADDRTYPE_BROADCAST;
7914 }
7915 }
7916
7917 /*
7918 * Handle anything but M_DATA messages
7919 * We see the DL_UNITDATA_IND which are part
7920 * of the data path, and also the other messages from the driver.
7921 */
7922 void
7923 ip_rput_notdata(ill_t *ill, mblk_t *mp)
7924 {
7925 mblk_t *first_mp;
7926 struct iocblk *iocp;
7927 struct mac_header_info_s mhi;
7928
7929 switch (DB_TYPE(mp)) {
7930 case M_PROTO:
7931 case M_PCPROTO: {
7932 if (((dl_unitdata_ind_t *)mp->b_rptr)->dl_primitive !=
7933 DL_UNITDATA_IND) {
7934 /* Go handle anything other than data elsewhere. */
7935 ip_rput_dlpi(ill, mp);
7936 return;
7937 }
7938
7939 first_mp = mp;
7940 mp = first_mp->b_cont;
7941 first_mp->b_cont = NULL;
7942
7943 if (mp == NULL) {
7944 freeb(first_mp);
7945 return;
7946 }
7947 ip_dlur_to_mhi(ill, first_mp, &mhi);
7948 if (ill->ill_isv6)
7949 ip_input_v6(ill, NULL, mp, &mhi);
7950 else
7951 ip_input(ill, NULL, mp, &mhi);
7952
7953 /* Ditch the DLPI header. */
7954 freeb(first_mp);
7955 return;
7956 }
7957 case M_IOCACK:
7958 iocp = (struct iocblk *)mp->b_rptr;
7959 switch (iocp->ioc_cmd) {
7960 case DL_IOC_HDR_INFO:
7961 ill_fastpath_ack(ill, mp);
7962 return;
7963 default:
7964 putnext(ill->ill_rq, mp);
7965 return;
7966 }
7967 /* FALLTHRU */
7968 case M_ERROR:
7969 case M_HANGUP:
7970 mutex_enter(&ill->ill_lock);
7971 if (ill->ill_state_flags & ILL_CONDEMNED) {
7972 mutex_exit(&ill->ill_lock);
7973 freemsg(mp);
7974 return;
7975 }
7976 ill_refhold_locked(ill);
7977 mutex_exit(&ill->ill_lock);
7978 qwriter_ip(ill, ill->ill_rq, mp, ip_rput_other, CUR_OP,
7979 B_FALSE);
7980 return;
7981 case M_CTL:
7982 putnext(ill->ill_rq, mp);
7983 return;
7984 case M_IOCNAK:
7985 ip1dbg(("got iocnak "));
7986 iocp = (struct iocblk *)mp->b_rptr;
7987 switch (iocp->ioc_cmd) {
7988 case DL_IOC_HDR_INFO:
7989 ip_rput_other(NULL, ill->ill_rq, mp, NULL);
7990 return;
7991 default:
7992 break;
7993 }
7994 /* FALLTHRU */
7995 default:
7996 putnext(ill->ill_rq, mp);
7997 return;
7998 }
7999 }
8000
8001 /* Read side put procedure. Packets coming from the wire arrive here. */
8002 void
8003 ip_rput(queue_t *q, mblk_t *mp)
8004 {
8005 ill_t *ill;
8006 union DL_primitives *dl;
8007
8008 ill = (ill_t *)q->q_ptr;
8009
8010 if (ill->ill_state_flags & (ILL_CONDEMNED | ILL_LL_SUBNET_PENDING)) {
8011 /*
8012 * If things are opening or closing, only accept high-priority
8013 * DLPI messages. (On open ill->ill_ipif has not yet been
8014 * created; on close, things hanging off the ill may have been
8015 * freed already.)
8016 */
8017 dl = (union DL_primitives *)mp->b_rptr;
8018 if (DB_TYPE(mp) != M_PCPROTO ||
8019 dl->dl_primitive == DL_UNITDATA_IND) {
8020 inet_freemsg(mp);
8021 return;
8022 }
8023 }
8024 if (DB_TYPE(mp) == M_DATA) {
8025 struct mac_header_info_s mhi;
8026
8027 ip_mdata_to_mhi(ill, mp, &mhi);
8028 ip_input(ill, NULL, mp, &mhi);
8029 } else {
8030 ip_rput_notdata(ill, mp);
8031 }
8032 }
8033
8034 /*
8035 * Move the information to a copy.
8036 */
8037 mblk_t *
8038 ip_fix_dbref(mblk_t *mp, ip_recv_attr_t *ira)
8039 {
8040 mblk_t *mp1;
8041 ill_t *ill = ira->ira_ill;
8042 ip_stack_t *ipst = ill->ill_ipst;
8043
8044 IP_STAT(ipst, ip_db_ref);
8045
8046 /* Make sure we have ira_l2src before we loose the original mblk */
8047 if (!(ira->ira_flags & IRAF_L2SRC_SET))
8048 ip_setl2src(mp, ira, ira->ira_rill);
8049
8050 mp1 = copymsg(mp);
8051 if (mp1 == NULL) {
8052 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
8053 ip_drop_input("ipIfStatsInDiscards", mp, ill);
8054 freemsg(mp);
8055 return (NULL);
8056 }
8057 /* preserve the hardware checksum flags and data, if present */
8058 if (DB_CKSUMFLAGS(mp) != 0) {
8059 DB_CKSUMFLAGS(mp1) = DB_CKSUMFLAGS(mp);
8060 DB_CKSUMSTART(mp1) = DB_CKSUMSTART(mp);
8061 DB_CKSUMSTUFF(mp1) = DB_CKSUMSTUFF(mp);
8062 DB_CKSUMEND(mp1) = DB_CKSUMEND(mp);
8063 DB_CKSUM16(mp1) = DB_CKSUM16(mp);
8064 }
8065 freemsg(mp);
8066 return (mp1);
8067 }
8068
8069 static void
8070 ip_dlpi_error(ill_t *ill, t_uscalar_t prim, t_uscalar_t dl_err,
8071 t_uscalar_t err)
8072 {
8073 if (dl_err == DL_SYSERR) {
8074 (void) mi_strlog(ill->ill_rq, 1, SL_CONSOLE|SL_ERROR|SL_TRACE,
8075 "%s: %s failed: DL_SYSERR (errno %u)\n",
8076 ill->ill_name, dl_primstr(prim), err);
8077 return;
8078 }
8079
8080 (void) mi_strlog(ill->ill_rq, 1, SL_CONSOLE|SL_ERROR|SL_TRACE,
8081 "%s: %s failed: %s\n", ill->ill_name, dl_primstr(prim),
8082 dl_errstr(dl_err));
8083 }
8084
8085 /*
8086 * ip_rput_dlpi is called by ip_rput to handle all DLPI messages other
8087 * than DL_UNITDATA_IND messages. If we need to process this message
8088 * exclusively, we call qwriter_ip, in which case we also need to call
8089 * ill_refhold before that, since qwriter_ip does an ill_refrele.
8090 */
8091 void
8092 ip_rput_dlpi(ill_t *ill, mblk_t *mp)
8093 {
8094 dl_ok_ack_t *dloa = (dl_ok_ack_t *)mp->b_rptr;
8095 dl_error_ack_t *dlea = (dl_error_ack_t *)dloa;
8096 queue_t *q = ill->ill_rq;
8097 t_uscalar_t prim = dloa->dl_primitive;
8098 t_uscalar_t reqprim = DL_PRIM_INVAL;
8099
8100 DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi",
8101 char *, dl_primstr(prim), ill_t *, ill);
8102 ip1dbg(("ip_rput_dlpi"));
8103
8104 /*
8105 * If we received an ACK but didn't send a request for it, then it
8106 * can't be part of any pending operation; discard up-front.
8107 */
8108 switch (prim) {
8109 case DL_ERROR_ACK:
8110 reqprim = dlea->dl_error_primitive;
8111 ip2dbg(("ip_rput_dlpi(%s): DL_ERROR_ACK for %s (0x%x): %s "
8112 "(0x%x), unix %u\n", ill->ill_name, dl_primstr(reqprim),
8113 reqprim, dl_errstr(dlea->dl_errno), dlea->dl_errno,
8114 dlea->dl_unix_errno));
8115 break;
8116 case DL_OK_ACK:
8117 reqprim = dloa->dl_correct_primitive;
8118 break;
8119 case DL_INFO_ACK:
8120 reqprim = DL_INFO_REQ;
8121 break;
8122 case DL_BIND_ACK:
8123 reqprim = DL_BIND_REQ;
8124 break;
8125 case DL_PHYS_ADDR_ACK:
8126 reqprim = DL_PHYS_ADDR_REQ;
8127 break;
8128 case DL_NOTIFY_ACK:
8129 reqprim = DL_NOTIFY_REQ;
8130 break;
8131 case DL_CAPABILITY_ACK:
8132 reqprim = DL_CAPABILITY_REQ;
8133 break;
8134 }
8135
8136 if (prim != DL_NOTIFY_IND) {
8137 if (reqprim == DL_PRIM_INVAL ||
8138 !ill_dlpi_pending(ill, reqprim)) {
8139 /* Not a DLPI message we support or expected */
8140 freemsg(mp);
8141 return;
8142 }
8143 ip1dbg(("ip_rput: received %s for %s\n", dl_primstr(prim),
8144 dl_primstr(reqprim)));
8145 }
8146
8147 switch (reqprim) {
8148 case DL_UNBIND_REQ:
8149 /*
8150 * NOTE: we mark the unbind as complete even if we got a
8151 * DL_ERROR_ACK, since there's not much else we can do.
8152 */
8153 mutex_enter(&ill->ill_lock);
8154 ill->ill_state_flags &= ~ILL_DL_UNBIND_IN_PROGRESS;
8155 cv_signal(&ill->ill_cv);
8156 mutex_exit(&ill->ill_lock);
8157 break;
8158
8159 case DL_ENABMULTI_REQ:
8160 if (prim == DL_OK_ACK) {
8161 if (ill->ill_dlpi_multicast_state == IDS_INPROGRESS)
8162 ill->ill_dlpi_multicast_state = IDS_OK;
8163 }
8164 break;
8165 }
8166
8167 /*
8168 * The message is one we're waiting for (or DL_NOTIFY_IND), but we
8169 * need to become writer to continue to process it. Because an
8170 * exclusive operation doesn't complete until replies to all queued
8171 * DLPI messages have been received, we know we're in the middle of an
8172 * exclusive operation and pass CUR_OP (except for DL_NOTIFY_IND).
8173 *
8174 * As required by qwriter_ip(), we refhold the ill; it will refrele.
8175 * Since this is on the ill stream we unconditionally bump up the
8176 * refcount without doing ILL_CAN_LOOKUP().
8177 */
8178 ill_refhold(ill);
8179 if (prim == DL_NOTIFY_IND)
8180 qwriter_ip(ill, q, mp, ip_rput_dlpi_writer, NEW_OP, B_FALSE);
8181 else
8182 qwriter_ip(ill, q, mp, ip_rput_dlpi_writer, CUR_OP, B_FALSE);
8183 }
8184
8185 /*
8186 * Handling of DLPI messages that require exclusive access to the ipsq.
8187 *
8188 * Need to do ipsq_pending_mp_get on ioctl completion, which could
8189 * happen here. (along with mi_copy_done)
8190 */
8191 /* ARGSUSED */
8192 static void
8193 ip_rput_dlpi_writer(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg)
8194 {
8195 dl_ok_ack_t *dloa = (dl_ok_ack_t *)mp->b_rptr;
8196 dl_error_ack_t *dlea = (dl_error_ack_t *)dloa;
8197 int err = 0;
8198 ill_t *ill = (ill_t *)q->q_ptr;
8199 ipif_t *ipif = NULL;
8200 mblk_t *mp1 = NULL;
8201 conn_t *connp = NULL;
8202 t_uscalar_t paddrreq;
8203 mblk_t *mp_hw;
8204 boolean_t success;
8205 boolean_t ioctl_aborted = B_FALSE;
8206 boolean_t log = B_TRUE;
8207
8208 DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer",
8209 char *, dl_primstr(dloa->dl_primitive), ill_t *, ill);
8210
8211 ip1dbg(("ip_rput_dlpi_writer .."));
8212 ASSERT(ipsq->ipsq_xop == ill->ill_phyint->phyint_ipsq->ipsq_xop);
8213 ASSERT(IAM_WRITER_ILL(ill));
8214
8215 ipif = ipsq->ipsq_xop->ipx_pending_ipif;
8216 /*
8217 * The current ioctl could have been aborted by the user and a new
8218 * ioctl to bring up another ill could have started. We could still
8219 * get a response from the driver later.
8220 */
8221 if (ipif != NULL && ipif->ipif_ill != ill)
8222 ioctl_aborted = B_TRUE;
8223
8224 switch (dloa->dl_primitive) {
8225 case DL_ERROR_ACK:
8226 ip1dbg(("ip_rput_dlpi_writer: got DL_ERROR_ACK for %s\n",
8227 dl_primstr(dlea->dl_error_primitive)));
8228
8229 DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer error",
8230 char *, dl_primstr(dlea->dl_error_primitive),
8231 ill_t *, ill);
8232
8233 switch (dlea->dl_error_primitive) {
8234 case DL_DISABMULTI_REQ:
8235 ill_dlpi_done(ill, dlea->dl_error_primitive);
8236 break;
8237 case DL_PROMISCON_REQ:
8238 case DL_PROMISCOFF_REQ:
8239 case DL_UNBIND_REQ:
8240 case DL_ATTACH_REQ:
8241 case DL_INFO_REQ:
8242 ill_dlpi_done(ill, dlea->dl_error_primitive);
8243 break;
8244 case DL_NOTIFY_REQ:
8245 ill_dlpi_done(ill, DL_NOTIFY_REQ);
8246 log = B_FALSE;
8247 break;
8248 case DL_PHYS_ADDR_REQ:
8249 /*
8250 * For IPv6 only, there are two additional
8251 * phys_addr_req's sent to the driver to get the
8252 * IPv6 token and lla. This allows IP to acquire
8253 * the hardware address format for a given interface
8254 * without having built in knowledge of the hardware
8255 * address. ill_phys_addr_pend keeps track of the last
8256 * DL_PAR sent so we know which response we are
8257 * dealing with. ill_dlpi_done will update
8258 * ill_phys_addr_pend when it sends the next req.
8259 * We don't complete the IOCTL until all three DL_PARs
8260 * have been attempted, so set *_len to 0 and break.
8261 */
8262 paddrreq = ill->ill_phys_addr_pend;
8263 ill_dlpi_done(ill, DL_PHYS_ADDR_REQ);
8264 if (paddrreq == DL_IPV6_TOKEN) {
8265 ill->ill_token_length = 0;
8266 log = B_FALSE;
8267 break;
8268 } else if (paddrreq == DL_IPV6_LINK_LAYER_ADDR) {
8269 ill->ill_nd_lla_len = 0;
8270 log = B_FALSE;
8271 break;
8272 }
8273 /*
8274 * Something went wrong with the DL_PHYS_ADDR_REQ.
8275 * We presumably have an IOCTL hanging out waiting
8276 * for completion. Find it and complete the IOCTL
8277 * with the error noted.
8278 * However, ill_dl_phys was called on an ill queue
8279 * (from SIOCSLIFNAME), thus conn_pending_ill is not
8280 * set. But the ioctl is known to be pending on ill_wq.
8281 */
8282 if (!ill->ill_ifname_pending)
8283 break;
8284 ill->ill_ifname_pending = 0;
8285 if (!ioctl_aborted)
8286 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8287 if (mp1 != NULL) {
8288 /*
8289 * This operation (SIOCSLIFNAME) must have
8290 * happened on the ill. Assert there is no conn
8291 */
8292 ASSERT(connp == NULL);
8293 q = ill->ill_wq;
8294 }
8295 break;
8296 case DL_BIND_REQ:
8297 ill_dlpi_done(ill, DL_BIND_REQ);
8298 if (ill->ill_ifname_pending)
8299 break;
8300 mutex_enter(&ill->ill_lock);
8301 ill->ill_state_flags &= ~ILL_DOWN_IN_PROGRESS;
8302 mutex_exit(&ill->ill_lock);
8303 /*
8304 * Something went wrong with the bind. We presumably
8305 * have an IOCTL hanging out waiting for completion.
8306 * Find it, take down the interface that was coming
8307 * up, and complete the IOCTL with the error noted.
8308 */
8309 if (!ioctl_aborted)
8310 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8311 if (mp1 != NULL) {
8312 /*
8313 * This might be a result of a DL_NOTE_REPLUMB
8314 * notification. In that case, connp is NULL.
8315 */
8316 if (connp != NULL)
8317 q = CONNP_TO_WQ(connp);
8318
8319 (void) ipif_down(ipif, NULL, NULL);
8320 /* error is set below the switch */
8321 }
8322 break;
8323 case DL_ENABMULTI_REQ:
8324 ill_dlpi_done(ill, DL_ENABMULTI_REQ);
8325
8326 if (ill->ill_dlpi_multicast_state == IDS_INPROGRESS)
8327 ill->ill_dlpi_multicast_state = IDS_FAILED;
8328 if (ill->ill_dlpi_multicast_state == IDS_FAILED) {
8329
8330 printf("ip: joining multicasts failed (%d)"
8331 " on %s - will use link layer "
8332 "broadcasts for multicast\n",
8333 dlea->dl_errno, ill->ill_name);
8334
8335 /*
8336 * Set up for multi_bcast; We are the
8337 * writer, so ok to access ill->ill_ipif
8338 * without any lock.
8339 */
8340 mutex_enter(&ill->ill_phyint->phyint_lock);
8341 ill->ill_phyint->phyint_flags |=
8342 PHYI_MULTI_BCAST;
8343 mutex_exit(&ill->ill_phyint->phyint_lock);
8344
8345 }
8346 freemsg(mp); /* Don't want to pass this up */
8347 return;
8348 case DL_CAPABILITY_REQ:
8349 ip1dbg(("ip_rput_dlpi_writer: got DL_ERROR_ACK for "
8350 "DL_CAPABILITY REQ\n"));
8351 if (ill->ill_dlpi_capab_state == IDCS_PROBE_SENT)
8352 ill->ill_dlpi_capab_state = IDCS_FAILED;
8353 ill_capability_done(ill);
8354 freemsg(mp);
8355 return;
8356 }
8357 /*
8358 * Note the error for IOCTL completion (mp1 is set when
8359 * ready to complete ioctl). If ill_ifname_pending_err is
8360 * set, an error occured during plumbing (ill_ifname_pending),
8361 * so we want to report that error.
8362 *
8363 * NOTE: there are two addtional DL_PHYS_ADDR_REQ's
8364 * (DL_IPV6_TOKEN and DL_IPV6_LINK_LAYER_ADDR) that are
8365 * expected to get errack'd if the driver doesn't support
8366 * these flags (e.g. ethernet). log will be set to B_FALSE
8367 * if these error conditions are encountered.
8368 */
8369 if (mp1 != NULL) {
8370 if (ill->ill_ifname_pending_err != 0) {
8371 err = ill->ill_ifname_pending_err;
8372 ill->ill_ifname_pending_err = 0;
8373 } else {
8374 err = dlea->dl_unix_errno ?
8375 dlea->dl_unix_errno : ENXIO;
8376 }
8377 /*
8378 * If we're plumbing an interface and an error hasn't already
8379 * been saved, set ill_ifname_pending_err to the error passed
8380 * up. Ignore the error if log is B_FALSE (see comment above).
8381 */
8382 } else if (log && ill->ill_ifname_pending &&
8383 ill->ill_ifname_pending_err == 0) {
8384 ill->ill_ifname_pending_err = dlea->dl_unix_errno ?
8385 dlea->dl_unix_errno : ENXIO;
8386 }
8387
8388 if (log)
8389 ip_dlpi_error(ill, dlea->dl_error_primitive,
8390 dlea->dl_errno, dlea->dl_unix_errno);
8391 break;
8392 case DL_CAPABILITY_ACK:
8393 ill_capability_ack(ill, mp);
8394 /*
8395 * The message has been handed off to ill_capability_ack
8396 * and must not be freed below
8397 */
8398 mp = NULL;
8399 break;
8400
8401 case DL_INFO_ACK:
8402 /* Call a routine to handle this one. */
8403 ill_dlpi_done(ill, DL_INFO_REQ);
8404 ip_ll_subnet_defaults(ill, mp);
8405 ASSERT(!MUTEX_HELD(&ill->ill_phyint->phyint_ipsq->ipsq_lock));
8406 return;
8407 case DL_BIND_ACK:
8408 /*
8409 * We should have an IOCTL waiting on this unless
8410 * sent by ill_dl_phys, in which case just return
8411 */
8412 ill_dlpi_done(ill, DL_BIND_REQ);
8413
8414 if (ill->ill_ifname_pending) {
8415 DTRACE_PROBE2(ip__rput__dlpi__ifname__pending,
8416 ill_t *, ill, mblk_t *, mp);
8417 break;
8418 }
8419 mutex_enter(&ill->ill_lock);
8420 ill->ill_dl_up = 1;
8421 ill->ill_state_flags &= ~ILL_DOWN_IN_PROGRESS;
8422 mutex_exit(&ill->ill_lock);
8423
8424 if (!ioctl_aborted)
8425 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8426 if (mp1 == NULL) {
8427 DTRACE_PROBE1(ip__rput__dlpi__no__mblk, ill_t *, ill);
8428 break;
8429 }
8430 /*
8431 * mp1 was added by ill_dl_up(). if that is a result of
8432 * a DL_NOTE_REPLUMB notification, connp could be NULL.
8433 */
8434 if (connp != NULL)
8435 q = CONNP_TO_WQ(connp);
8436 /*
8437 * We are exclusive. So nothing can change even after
8438 * we get the pending mp.
8439 */
8440 ip1dbg(("ip_rput_dlpi: bind_ack %s\n", ill->ill_name));
8441 DTRACE_PROBE1(ip__rput__dlpi__bind__ack, ill_t *, ill);
8442 ill_nic_event_dispatch(ill, 0, NE_UP, NULL, 0);
8443
8444 /*
8445 * Now bring up the resolver; when that is complete, we'll
8446 * create IREs. Note that we intentionally mirror what
8447 * ipif_up() would have done, because we got here by way of
8448 * ill_dl_up(), which stopped ipif_up()'s processing.
8449 */
8450 if (ill->ill_isv6) {
8451 /*
8452 * v6 interfaces.
8453 * Unlike ARP which has to do another bind
8454 * and attach, once we get here we are
8455 * done with NDP
8456 */
8457 (void) ipif_resolver_up(ipif, Res_act_initial);
8458 if ((err = ipif_ndp_up(ipif, B_TRUE)) == 0)
8459 err = ipif_up_done_v6(ipif);
8460 } else if (ill->ill_net_type == IRE_IF_RESOLVER) {
8461 /*
8462 * ARP and other v4 external resolvers.
8463 * Leave the pending mblk intact so that
8464 * the ioctl completes in ip_rput().
8465 */
8466 if (connp != NULL)
8467 mutex_enter(&connp->conn_lock);
8468 mutex_enter(&ill->ill_lock);
8469 success = ipsq_pending_mp_add(connp, ipif, q, mp1, 0);
8470 mutex_exit(&ill->ill_lock);
8471 if (connp != NULL)
8472 mutex_exit(&connp->conn_lock);
8473 if (success) {
8474 err = ipif_resolver_up(ipif, Res_act_initial);
8475 if (err == EINPROGRESS) {
8476 freemsg(mp);
8477 return;
8478 }
8479 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8480 } else {
8481 /* The conn has started closing */
8482 err = EINTR;
8483 }
8484 } else {
8485 /*
8486 * This one is complete. Reply to pending ioctl.
8487 */
8488 (void) ipif_resolver_up(ipif, Res_act_initial);
8489 err = ipif_up_done(ipif);
8490 }
8491
8492 if ((err == 0) && (ill->ill_up_ipifs)) {
8493 err = ill_up_ipifs(ill, q, mp1);
8494 if (err == EINPROGRESS) {
8495 freemsg(mp);
8496 return;
8497 }
8498 }
8499
8500 /*
8501 * If we have a moved ipif to bring up, and everything has
8502 * succeeded to this point, bring it up on the IPMP ill.
8503 * Otherwise, leave it down -- the admin can try to bring it
8504 * up by hand if need be.
8505 */
8506 if (ill->ill_move_ipif != NULL) {
8507 if (err != 0) {
8508 ill->ill_move_ipif = NULL;
8509 } else {
8510 ipif = ill->ill_move_ipif;
8511 ill->ill_move_ipif = NULL;
8512 err = ipif_up(ipif, q, mp1);
8513 if (err == EINPROGRESS) {
8514 freemsg(mp);
8515 return;
8516 }
8517 }
8518 }
8519 break;
8520
8521 case DL_NOTIFY_IND: {
8522 dl_notify_ind_t *notify = (dl_notify_ind_t *)mp->b_rptr;
8523 uint_t orig_mtu, orig_mc_mtu;
8524
8525 switch (notify->dl_notification) {
8526 case DL_NOTE_PHYS_ADDR:
8527 err = ill_set_phys_addr(ill, mp);
8528 break;
8529
8530 case DL_NOTE_REPLUMB:
8531 /*
8532 * Directly return after calling ill_replumb().
8533 * Note that we should not free mp as it is reused
8534 * in the ill_replumb() function.
8535 */
8536 err = ill_replumb(ill, mp);
8537 return;
8538
8539 case DL_NOTE_FASTPATH_FLUSH:
8540 nce_flush(ill, B_FALSE);
8541 break;
8542
8543 case DL_NOTE_SDU_SIZE:
8544 case DL_NOTE_SDU_SIZE2:
8545 /*
8546 * The dce and fragmentation code can cope with
8547 * this changing while packets are being sent.
8548 * When packets are sent ip_output will discover
8549 * a change.
8550 *
8551 * Change the MTU size of the interface.
8552 */
8553 mutex_enter(&ill->ill_lock);
8554 orig_mtu = ill->ill_mtu;
8555 orig_mc_mtu = ill->ill_mc_mtu;
8556 switch (notify->dl_notification) {
8557 case DL_NOTE_SDU_SIZE:
8558 ill->ill_current_frag =
8559 (uint_t)notify->dl_data;
8560 ill->ill_mc_mtu = (uint_t)notify->dl_data;
8561 break;
8562 case DL_NOTE_SDU_SIZE2:
8563 ill->ill_current_frag =
8564 (uint_t)notify->dl_data1;
8565 ill->ill_mc_mtu = (uint_t)notify->dl_data2;
8566 break;
8567 }
8568 if (ill->ill_current_frag > ill->ill_max_frag)
8569 ill->ill_max_frag = ill->ill_current_frag;
8570
8571 if (!(ill->ill_flags & ILLF_FIXEDMTU)) {
8572 ill->ill_mtu = ill->ill_current_frag;
8573
8574 /*
8575 * If ill_user_mtu was set (via
8576 * SIOCSLIFLNKINFO), clamp ill_mtu at it.
8577 */
8578 if (ill->ill_user_mtu != 0 &&
8579 ill->ill_user_mtu < ill->ill_mtu)
8580 ill->ill_mtu = ill->ill_user_mtu;
8581
8582 if (ill->ill_user_mtu != 0 &&
8583 ill->ill_user_mtu < ill->ill_mc_mtu)
8584 ill->ill_mc_mtu = ill->ill_user_mtu;
8585
8586 if (ill->ill_isv6) {
8587 if (ill->ill_mtu < IPV6_MIN_MTU)
8588 ill->ill_mtu = IPV6_MIN_MTU;
8589 if (ill->ill_mc_mtu < IPV6_MIN_MTU)
8590 ill->ill_mc_mtu = IPV6_MIN_MTU;
8591 } else {
8592 if (ill->ill_mtu < IP_MIN_MTU)
8593 ill->ill_mtu = IP_MIN_MTU;
8594 if (ill->ill_mc_mtu < IP_MIN_MTU)
8595 ill->ill_mc_mtu = IP_MIN_MTU;
8596 }
8597 } else if (ill->ill_mc_mtu > ill->ill_mtu) {
8598 ill->ill_mc_mtu = ill->ill_mtu;
8599 }
8600
8601 mutex_exit(&ill->ill_lock);
8602 /*
8603 * Make sure all dce_generation checks find out
8604 * that ill_mtu/ill_mc_mtu has changed.
8605 */
8606 if (orig_mtu != ill->ill_mtu ||
8607 orig_mc_mtu != ill->ill_mc_mtu) {
8608 dce_increment_all_generations(ill->ill_isv6,
8609 ill->ill_ipst);
8610 }
8611
8612 /*
8613 * Refresh IPMP meta-interface MTU if necessary.
8614 */
8615 if (IS_UNDER_IPMP(ill))
8616 ipmp_illgrp_refresh_mtu(ill->ill_grp);
8617 break;
8618
8619 case DL_NOTE_LINK_UP:
8620 case DL_NOTE_LINK_DOWN: {
8621 /*
8622 * We are writer. ill / phyint / ipsq assocs stable.
8623 * The RUNNING flag reflects the state of the link.
8624 */
8625 phyint_t *phyint = ill->ill_phyint;
8626 uint64_t new_phyint_flags;
8627 boolean_t changed = B_FALSE;
8628 boolean_t went_up;
8629
8630 went_up = notify->dl_notification == DL_NOTE_LINK_UP;
8631 mutex_enter(&phyint->phyint_lock);
8632
8633 new_phyint_flags = went_up ?
8634 phyint->phyint_flags | PHYI_RUNNING :
8635 phyint->phyint_flags & ~PHYI_RUNNING;
8636
8637 if (IS_IPMP(ill)) {
8638 new_phyint_flags = went_up ?
8639 new_phyint_flags & ~PHYI_FAILED :
8640 new_phyint_flags | PHYI_FAILED;
8641 }
8642
8643 if (new_phyint_flags != phyint->phyint_flags) {
8644 phyint->phyint_flags = new_phyint_flags;
8645 changed = B_TRUE;
8646 }
8647 mutex_exit(&phyint->phyint_lock);
8648 /*
8649 * ill_restart_dad handles the DAD restart and routing
8650 * socket notification logic.
8651 */
8652 if (changed) {
8653 ill_restart_dad(phyint->phyint_illv4, went_up);
8654 ill_restart_dad(phyint->phyint_illv6, went_up);
8655 }
8656 break;
8657 }
8658 case DL_NOTE_PROMISC_ON_PHYS: {
8659 phyint_t *phyint = ill->ill_phyint;
8660
8661 mutex_enter(&phyint->phyint_lock);
8662 phyint->phyint_flags |= PHYI_PROMISC;
8663 mutex_exit(&phyint->phyint_lock);
8664 break;
8665 }
8666 case DL_NOTE_PROMISC_OFF_PHYS: {
8667 phyint_t *phyint = ill->ill_phyint;
8668
8669 mutex_enter(&phyint->phyint_lock);
8670 phyint->phyint_flags &= ~PHYI_PROMISC;
8671 mutex_exit(&phyint->phyint_lock);
8672 break;
8673 }
8674 case DL_NOTE_CAPAB_RENEG:
8675 /*
8676 * Something changed on the driver side.
8677 * It wants us to renegotiate the capabilities
8678 * on this ill. One possible cause is the aggregation
8679 * interface under us where a port got added or
8680 * went away.
8681 *
8682 * If the capability negotiation is already done
8683 * or is in progress, reset the capabilities and
8684 * mark the ill's ill_capab_reneg to be B_TRUE,
8685 * so that when the ack comes back, we can start
8686 * the renegotiation process.
8687 *
8688 * Note that if ill_capab_reneg is already B_TRUE
8689 * (ill_dlpi_capab_state is IDS_UNKNOWN in this case),
8690 * the capability resetting request has been sent
8691 * and the renegotiation has not been started yet;
8692 * nothing needs to be done in this case.
8693 */
8694 ipsq_current_start(ipsq, ill->ill_ipif, 0);
8695 ill_capability_reset(ill, B_TRUE);
8696 ipsq_current_finish(ipsq);
8697 break;
8698
8699 case DL_NOTE_ALLOWED_IPS:
8700 ill_set_allowed_ips(ill, mp);
8701 break;
8702 default:
8703 ip0dbg(("ip_rput_dlpi_writer: unknown notification "
8704 "type 0x%x for DL_NOTIFY_IND\n",
8705 notify->dl_notification));
8706 break;
8707 }
8708
8709 /*
8710 * As this is an asynchronous operation, we
8711 * should not call ill_dlpi_done
8712 */
8713 break;
8714 }
8715 case DL_NOTIFY_ACK: {
8716 dl_notify_ack_t *noteack = (dl_notify_ack_t *)mp->b_rptr;
8717
8718 if (noteack->dl_notifications & DL_NOTE_LINK_UP)
8719 ill->ill_note_link = 1;
8720 ill_dlpi_done(ill, DL_NOTIFY_REQ);
8721 break;
8722 }
8723 case DL_PHYS_ADDR_ACK: {
8724 /*
8725 * As part of plumbing the interface via SIOCSLIFNAME,
8726 * ill_dl_phys() will queue a series of DL_PHYS_ADDR_REQs,
8727 * whose answers we receive here. As each answer is received,
8728 * we call ill_dlpi_done() to dispatch the next request as
8729 * we're processing the current one. Once all answers have
8730 * been received, we use ipsq_pending_mp_get() to dequeue the
8731 * outstanding IOCTL and reply to it. (Because ill_dl_phys()
8732 * is invoked from an ill queue, conn_oper_pending_ill is not
8733 * available, but we know the ioctl is pending on ill_wq.)
8734 */
8735 uint_t paddrlen, paddroff;
8736 uint8_t *addr;
8737
8738 paddrreq = ill->ill_phys_addr_pend;
8739 paddrlen = ((dl_phys_addr_ack_t *)mp->b_rptr)->dl_addr_length;
8740 paddroff = ((dl_phys_addr_ack_t *)mp->b_rptr)->dl_addr_offset;
8741 addr = mp->b_rptr + paddroff;
8742
8743 ill_dlpi_done(ill, DL_PHYS_ADDR_REQ);
8744 if (paddrreq == DL_IPV6_TOKEN) {
8745 /*
8746 * bcopy to low-order bits of ill_token
8747 *
8748 * XXX Temporary hack - currently, all known tokens
8749 * are 64 bits, so I'll cheat for the moment.
8750 */
8751 bcopy(addr, &ill->ill_token.s6_addr32[2], paddrlen);
8752 ill->ill_token_length = paddrlen;
8753 break;
8754 } else if (paddrreq == DL_IPV6_LINK_LAYER_ADDR) {
8755 ASSERT(ill->ill_nd_lla_mp == NULL);
8756 ill_set_ndmp(ill, mp, paddroff, paddrlen);
8757 mp = NULL;
8758 break;
8759 } else if (paddrreq == DL_CURR_DEST_ADDR) {
8760 ASSERT(ill->ill_dest_addr_mp == NULL);
8761 ill->ill_dest_addr_mp = mp;
8762 ill->ill_dest_addr = addr;
8763 mp = NULL;
8764 if (ill->ill_isv6) {
8765 ill_setdesttoken(ill);
8766 ipif_setdestlinklocal(ill->ill_ipif);
8767 }
8768 break;
8769 }
8770
8771 ASSERT(paddrreq == DL_CURR_PHYS_ADDR);
8772 ASSERT(ill->ill_phys_addr_mp == NULL);
8773 if (!ill->ill_ifname_pending)
8774 break;
8775 ill->ill_ifname_pending = 0;
8776 if (!ioctl_aborted)
8777 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8778 if (mp1 != NULL) {
8779 ASSERT(connp == NULL);
8780 q = ill->ill_wq;
8781 }
8782 /*
8783 * If any error acks received during the plumbing sequence,
8784 * ill_ifname_pending_err will be set. Break out and send up
8785 * the error to the pending ioctl.
8786 */
8787 if (ill->ill_ifname_pending_err != 0) {
8788 err = ill->ill_ifname_pending_err;
8789 ill->ill_ifname_pending_err = 0;
8790 break;
8791 }
8792
8793 ill->ill_phys_addr_mp = mp;
8794 ill->ill_phys_addr = (paddrlen == 0 ? NULL : addr);
8795 mp = NULL;
8796
8797 /*
8798 * If paddrlen or ill_phys_addr_length is zero, the DLPI
8799 * provider doesn't support physical addresses. We check both
8800 * paddrlen and ill_phys_addr_length because sppp (PPP) does
8801 * not have physical addresses, but historically adversises a
8802 * physical address length of 0 in its DL_INFO_ACK, but 6 in
8803 * its DL_PHYS_ADDR_ACK.
8804 */
8805 if (paddrlen == 0 || ill->ill_phys_addr_length == 0) {
8806 ill->ill_phys_addr = NULL;
8807 } else if (paddrlen != ill->ill_phys_addr_length) {
8808 ip0dbg(("DL_PHYS_ADDR_ACK: got addrlen %d, expected %d",
8809 paddrlen, ill->ill_phys_addr_length));
8810 err = EINVAL;
8811 break;
8812 }
8813
8814 if (ill->ill_nd_lla_mp == NULL) {
8815 if ((mp_hw = copyb(ill->ill_phys_addr_mp)) == NULL) {
8816 err = ENOMEM;
8817 break;
8818 }
8819 ill_set_ndmp(ill, mp_hw, paddroff, paddrlen);
8820 }
8821
8822 if (ill->ill_isv6) {
8823 ill_setdefaulttoken(ill);
8824 ipif_setlinklocal(ill->ill_ipif);
8825 }
8826 break;
8827 }
8828 case DL_OK_ACK:
8829 ip2dbg(("DL_OK_ACK %s (0x%x)\n",
8830 dl_primstr((int)dloa->dl_correct_primitive),
8831 dloa->dl_correct_primitive));
8832 DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer ok",
8833 char *, dl_primstr(dloa->dl_correct_primitive),
8834 ill_t *, ill);
8835
8836 switch (dloa->dl_correct_primitive) {
8837 case DL_ENABMULTI_REQ:
8838 case DL_DISABMULTI_REQ:
8839 ill_dlpi_done(ill, dloa->dl_correct_primitive);
8840 break;
8841 case DL_PROMISCON_REQ:
8842 case DL_PROMISCOFF_REQ:
8843 case DL_UNBIND_REQ:
8844 case DL_ATTACH_REQ:
8845 ill_dlpi_done(ill, dloa->dl_correct_primitive);
8846 break;
8847 }
8848 break;
8849 default:
8850 break;
8851 }
8852
8853 freemsg(mp);
8854 if (mp1 == NULL)
8855 return;
8856
8857 /*
8858 * The operation must complete without EINPROGRESS since
8859 * ipsq_pending_mp_get() has removed the mblk (mp1). Otherwise,
8860 * the operation will be stuck forever inside the IPSQ.
8861 */
8862 ASSERT(err != EINPROGRESS);
8863
8864 DTRACE_PROBE4(ipif__ioctl, char *, "ip_rput_dlpi_writer finish",
8865 int, ipsq->ipsq_xop->ipx_current_ioctl, ill_t *, ill,
8866 ipif_t *, NULL);
8867
8868 switch (ipsq->ipsq_xop->ipx_current_ioctl) {
8869 case 0:
8870 ipsq_current_finish(ipsq);
8871 break;
8872
8873 case SIOCSLIFNAME:
8874 case IF_UNITSEL: {
8875 ill_t *ill_other = ILL_OTHER(ill);
8876
8877 /*
8878 * If SIOCSLIFNAME or IF_UNITSEL is about to succeed, and the
8879 * ill has a peer which is in an IPMP group, then place ill
8880 * into the same group. One catch: although ifconfig plumbs
8881 * the appropriate IPMP meta-interface prior to plumbing this
8882 * ill, it is possible for multiple ifconfig applications to
8883 * race (or for another application to adjust plumbing), in
8884 * which case the IPMP meta-interface we need will be missing.
8885 * If so, kick the phyint out of the group.
8886 */
8887 if (err == 0 && ill_other != NULL && IS_UNDER_IPMP(ill_other)) {
8888 ipmp_grp_t *grp = ill->ill_phyint->phyint_grp;
8889 ipmp_illgrp_t *illg;
8890
8891 illg = ill->ill_isv6 ? grp->gr_v6 : grp->gr_v4;
8892 if (illg == NULL)
8893 ipmp_phyint_leave_grp(ill->ill_phyint);
8894 else
8895 ipmp_ill_join_illgrp(ill, illg);
8896 }
8897
8898 if (ipsq->ipsq_xop->ipx_current_ioctl == IF_UNITSEL)
8899 ip_ioctl_finish(q, mp1, err, NO_COPYOUT, ipsq);
8900 else
8901 ip_ioctl_finish(q, mp1, err, COPYOUT, ipsq);
8902 break;
8903 }
8904 case SIOCLIFADDIF:
8905 ip_ioctl_finish(q, mp1, err, COPYOUT, ipsq);
8906 break;
8907
8908 default:
8909 ip_ioctl_finish(q, mp1, err, NO_COPYOUT, ipsq);
8910 break;
8911 }
8912 }
8913
8914 /*
8915 * ip_rput_other is called by ip_rput to handle messages modifying the global
8916 * state in IP. If 'ipsq' is non-NULL, caller is writer on it.
8917 */
8918 /* ARGSUSED */
8919 void
8920 ip_rput_other(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg)
8921 {
8922 ill_t *ill = q->q_ptr;
8923 struct iocblk *iocp;
8924
8925 ip1dbg(("ip_rput_other "));
8926 if (ipsq != NULL) {
8927 ASSERT(IAM_WRITER_IPSQ(ipsq));
8928 ASSERT(ipsq->ipsq_xop ==
8929 ill->ill_phyint->phyint_ipsq->ipsq_xop);
8930 }
8931
8932 switch (mp->b_datap->db_type) {
8933 case M_ERROR:
8934 case M_HANGUP:
8935 /*
8936 * The device has a problem. We force the ILL down. It can
8937 * be brought up again manually using SIOCSIFFLAGS (via
8938 * ifconfig or equivalent).
8939 */
8940 ASSERT(ipsq != NULL);
8941 if (mp->b_rptr < mp->b_wptr)
8942 ill->ill_error = (int)(*mp->b_rptr & 0xFF);
8943 if (ill->ill_error == 0)
8944 ill->ill_error = ENXIO;
8945 if (!ill_down_start(q, mp))
8946 return;
8947 ipif_all_down_tail(ipsq, q, mp, NULL);
8948 break;
8949 case M_IOCNAK: {
8950 iocp = (struct iocblk *)mp->b_rptr;
8951
8952 ASSERT(iocp->ioc_cmd == DL_IOC_HDR_INFO);
8953 /*
8954 * If this was the first attempt, turn off the fastpath
8955 * probing.
8956 */
8957 mutex_enter(&ill->ill_lock);
8958 if (ill->ill_dlpi_fastpath_state == IDS_INPROGRESS) {
8959 ill->ill_dlpi_fastpath_state = IDS_FAILED;
8960 mutex_exit(&ill->ill_lock);
8961 /*
8962 * don't flush the nce_t entries: we use them
8963 * as an index to the ncec itself.
8964 */
8965 ip1dbg(("ip_rput: DLPI fastpath off on interface %s\n",
8966 ill->ill_name));
8967 } else {
8968 mutex_exit(&ill->ill_lock);
8969 }
8970 freemsg(mp);
8971 break;
8972 }
8973 default:
8974 ASSERT(0);
8975 break;
8976 }
8977 }
8978
8979 /*
8980 * Update any source route, record route or timestamp options
8981 * When it fails it has consumed the message and BUMPed the MIB.
8982 */
8983 boolean_t
8984 ip_forward_options(mblk_t *mp, ipha_t *ipha, ill_t *dst_ill,
8985 ip_recv_attr_t *ira)
8986 {
8987 ipoptp_t opts;
8988 uchar_t *opt;
8989 uint8_t optval;
8990 uint8_t optlen;
8991 ipaddr_t dst;
8992 ipaddr_t ifaddr;
8993 uint32_t ts;
8994 timestruc_t now;
8995 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
8996
8997 ip2dbg(("ip_forward_options\n"));
8998 dst = ipha->ipha_dst;
8999 for (optval = ipoptp_first(&opts, ipha);
9000 optval != IPOPT_EOL;
9001 optval = ipoptp_next(&opts)) {
9002 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
9003 opt = opts.ipoptp_cur;
9004 optlen = opts.ipoptp_len;
9005 ip2dbg(("ip_forward_options: opt %d, len %d\n",
9006 optval, opts.ipoptp_len));
9007 switch (optval) {
9008 uint32_t off;
9009 case IPOPT_SSRR:
9010 case IPOPT_LSRR:
9011 /* Check if adminstratively disabled */
9012 if (!ipst->ips_ip_forward_src_routed) {
9013 BUMP_MIB(dst_ill->ill_ip_mib,
9014 ipIfStatsForwProhibits);
9015 ip_drop_input("ICMP_SOURCE_ROUTE_FAILED",
9016 mp, dst_ill);
9017 icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED,
9018 ira);
9019 return (B_FALSE);
9020 }
9021 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
9022 /*
9023 * Must be partial since ip_input_options
9024 * checked for strict.
9025 */
9026 break;
9027 }
9028 off = opt[IPOPT_OFFSET];
9029 off--;
9030 redo_srr:
9031 if (optlen < IP_ADDR_LEN ||
9032 off > optlen - IP_ADDR_LEN) {
9033 /* End of source route */
9034 ip1dbg((
9035 "ip_forward_options: end of SR\n"));
9036 break;
9037 }
9038 /* Pick a reasonable address on the outbound if */
9039 ASSERT(dst_ill != NULL);
9040 if (ip_select_source_v4(dst_ill, INADDR_ANY, dst,
9041 INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL,
9042 NULL) != 0) {
9043 /* No source! Shouldn't happen */
9044 ifaddr = INADDR_ANY;
9045 }
9046 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
9047 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9048 ip1dbg(("ip_forward_options: next hop 0x%x\n",
9049 ntohl(dst)));
9050
9051 /*
9052 * Check if our address is present more than
9053 * once as consecutive hops in source route.
9054 */
9055 if (ip_type_v4(dst, ipst) == IRE_LOCAL) {
9056 off += IP_ADDR_LEN;
9057 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9058 goto redo_srr;
9059 }
9060 ipha->ipha_dst = dst;
9061 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9062 break;
9063 case IPOPT_RR:
9064 off = opt[IPOPT_OFFSET];
9065 off--;
9066 if (optlen < IP_ADDR_LEN ||
9067 off > optlen - IP_ADDR_LEN) {
9068 /* No more room - ignore */
9069 ip1dbg((
9070 "ip_forward_options: end of RR\n"));
9071 break;
9072 }
9073 /* Pick a reasonable address on the outbound if */
9074 ASSERT(dst_ill != NULL);
9075 if (ip_select_source_v4(dst_ill, INADDR_ANY, dst,
9076 INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL,
9077 NULL) != 0) {
9078 /* No source! Shouldn't happen */
9079 ifaddr = INADDR_ANY;
9080 }
9081 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9082 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9083 break;
9084 case IPOPT_TS:
9085 /* Insert timestamp if there is room */
9086 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9087 case IPOPT_TS_TSONLY:
9088 off = IPOPT_TS_TIMELEN;
9089 break;
9090 case IPOPT_TS_PRESPEC:
9091 case IPOPT_TS_PRESPEC_RFC791:
9092 /* Verify that the address matched */
9093 off = opt[IPOPT_OFFSET] - 1;
9094 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
9095 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
9096 /* Not for us */
9097 break;
9098 }
9099 /* FALLTHRU */
9100 case IPOPT_TS_TSANDADDR:
9101 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
9102 break;
9103 default:
9104 /*
9105 * ip_*put_options should have already
9106 * dropped this packet.
9107 */
9108 cmn_err(CE_PANIC, "ip_forward_options: "
9109 "unknown IT - bug in ip_input_options?\n");
9110 return (B_TRUE); /* Keep "lint" happy */
9111 }
9112 if (opt[IPOPT_OFFSET] - 1 + off > optlen) {
9113 /* Increase overflow counter */
9114 off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1;
9115 opt[IPOPT_POS_OV_FLG] =
9116 (uint8_t)((opt[IPOPT_POS_OV_FLG] & 0x0F) |
9117 (off << 4));
9118 break;
9119 }
9120 off = opt[IPOPT_OFFSET] - 1;
9121 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9122 case IPOPT_TS_PRESPEC:
9123 case IPOPT_TS_PRESPEC_RFC791:
9124 case IPOPT_TS_TSANDADDR:
9125 /* Pick a reasonable addr on the outbound if */
9126 ASSERT(dst_ill != NULL);
9127 if (ip_select_source_v4(dst_ill, INADDR_ANY,
9128 dst, INADDR_ANY, ALL_ZONES, ipst, &ifaddr,
9129 NULL, NULL) != 0) {
9130 /* No source! Shouldn't happen */
9131 ifaddr = INADDR_ANY;
9132 }
9133 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9134 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9135 /* FALLTHRU */
9136 case IPOPT_TS_TSONLY:
9137 off = opt[IPOPT_OFFSET] - 1;
9138 /* Compute # of milliseconds since midnight */
9139 gethrestime(&now);
9140 ts = (now.tv_sec % (24 * 60 * 60)) * 1000 +
9141 NSEC2MSEC(now.tv_nsec);
9142 bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN);
9143 opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN;
9144 break;
9145 }
9146 break;
9147 }
9148 }
9149 return (B_TRUE);
9150 }
9151
9152 /*
9153 * Call ill_frag_timeout to do garbage collection. ill_frag_timeout
9154 * returns 'true' if there are still fragments left on the queue, in
9155 * which case we restart the timer.
9156 */
9157 void
9158 ill_frag_timer(void *arg)
9159 {
9160 ill_t *ill = (ill_t *)arg;
9161 boolean_t frag_pending;
9162 ip_stack_t *ipst = ill->ill_ipst;
9163 time_t timeout;
9164
9165 mutex_enter(&ill->ill_lock);
9166 ASSERT(!ill->ill_fragtimer_executing);
9167 if (ill->ill_state_flags & ILL_CONDEMNED) {
9168 ill->ill_frag_timer_id = 0;
9169 mutex_exit(&ill->ill_lock);
9170 return;
9171 }
9172 ill->ill_fragtimer_executing = 1;
9173 mutex_exit(&ill->ill_lock);
9174
9175 timeout = (ill->ill_isv6 ? ipst->ips_ipv6_reassembly_timeout :
9176 ipst->ips_ip_reassembly_timeout);
9177
9178 frag_pending = ill_frag_timeout(ill, timeout);
9179
9180 /*
9181 * Restart the timer, if we have fragments pending or if someone
9182 * wanted us to be scheduled again.
9183 */
9184 mutex_enter(&ill->ill_lock);
9185 ill->ill_fragtimer_executing = 0;
9186 ill->ill_frag_timer_id = 0;
9187 if (frag_pending || ill->ill_fragtimer_needrestart)
9188 ill_frag_timer_start(ill);
9189 mutex_exit(&ill->ill_lock);
9190 }
9191
9192 void
9193 ill_frag_timer_start(ill_t *ill)
9194 {
9195 ip_stack_t *ipst = ill->ill_ipst;
9196 clock_t timeo_ms;
9197
9198 ASSERT(MUTEX_HELD(&ill->ill_lock));
9199
9200 /* If the ill is closing or opening don't proceed */
9201 if (ill->ill_state_flags & ILL_CONDEMNED)
9202 return;
9203
9204 if (ill->ill_fragtimer_executing) {
9205 /*
9206 * ill_frag_timer is currently executing. Just record the
9207 * the fact that we want the timer to be restarted.
9208 * ill_frag_timer will post a timeout before it returns,
9209 * ensuring it will be called again.
9210 */
9211 ill->ill_fragtimer_needrestart = 1;
9212 return;
9213 }
9214
9215 if (ill->ill_frag_timer_id == 0) {
9216 timeo_ms = (ill->ill_isv6 ? ipst->ips_ipv6_reassembly_timeout :
9217 ipst->ips_ip_reassembly_timeout) * SECONDS;
9218
9219 /*
9220 * The timer is neither running nor is the timeout handler
9221 * executing. Post a timeout so that ill_frag_timer will be
9222 * called
9223 */
9224 ill->ill_frag_timer_id = timeout(ill_frag_timer, ill,
9225 MSEC_TO_TICK(timeo_ms >> 1));
9226 ill->ill_fragtimer_needrestart = 0;
9227 }
9228 }
9229
9230 /*
9231 * Update any source route, record route or timestamp options.
9232 * Check that we are at end of strict source route.
9233 * The options have already been checked for sanity in ip_input_options().
9234 */
9235 boolean_t
9236 ip_input_local_options(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira)
9237 {
9238 ipoptp_t opts;
9239 uchar_t *opt;
9240 uint8_t optval;
9241 uint8_t optlen;
9242 ipaddr_t dst;
9243 ipaddr_t ifaddr;
9244 uint32_t ts;
9245 timestruc_t now;
9246 ill_t *ill = ira->ira_ill;
9247 ip_stack_t *ipst = ill->ill_ipst;
9248
9249 ip2dbg(("ip_input_local_options\n"));
9250
9251 for (optval = ipoptp_first(&opts, ipha);
9252 optval != IPOPT_EOL;
9253 optval = ipoptp_next(&opts)) {
9254 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
9255 opt = opts.ipoptp_cur;
9256 optlen = opts.ipoptp_len;
9257 ip2dbg(("ip_input_local_options: opt %d, len %d\n",
9258 optval, optlen));
9259 switch (optval) {
9260 uint32_t off;
9261 case IPOPT_SSRR:
9262 case IPOPT_LSRR:
9263 off = opt[IPOPT_OFFSET];
9264 off--;
9265 if (optlen < IP_ADDR_LEN ||
9266 off > optlen - IP_ADDR_LEN) {
9267 /* End of source route */
9268 ip1dbg(("ip_input_local_options: end of SR\n"));
9269 break;
9270 }
9271 /*
9272 * This will only happen if two consecutive entries
9273 * in the source route contains our address or if
9274 * it is a packet with a loose source route which
9275 * reaches us before consuming the whole source route
9276 */
9277 ip1dbg(("ip_input_local_options: not end of SR\n"));
9278 if (optval == IPOPT_SSRR) {
9279 goto bad_src_route;
9280 }
9281 /*
9282 * Hack: instead of dropping the packet truncate the
9283 * source route to what has been used by filling the
9284 * rest with IPOPT_NOP.
9285 */
9286 opt[IPOPT_OLEN] = (uint8_t)off;
9287 while (off < optlen) {
9288 opt[off++] = IPOPT_NOP;
9289 }
9290 break;
9291 case IPOPT_RR:
9292 off = opt[IPOPT_OFFSET];
9293 off--;
9294 if (optlen < IP_ADDR_LEN ||
9295 off > optlen - IP_ADDR_LEN) {
9296 /* No more room - ignore */
9297 ip1dbg((
9298 "ip_input_local_options: end of RR\n"));
9299 break;
9300 }
9301 /* Pick a reasonable address on the outbound if */
9302 if (ip_select_source_v4(ill, INADDR_ANY, ipha->ipha_dst,
9303 INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL,
9304 NULL) != 0) {
9305 /* No source! Shouldn't happen */
9306 ifaddr = INADDR_ANY;
9307 }
9308 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9309 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9310 break;
9311 case IPOPT_TS:
9312 /* Insert timestamp if there is romm */
9313 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9314 case IPOPT_TS_TSONLY:
9315 off = IPOPT_TS_TIMELEN;
9316 break;
9317 case IPOPT_TS_PRESPEC:
9318 case IPOPT_TS_PRESPEC_RFC791:
9319 /* Verify that the address matched */
9320 off = opt[IPOPT_OFFSET] - 1;
9321 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
9322 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
9323 /* Not for us */
9324 break;
9325 }
9326 /* FALLTHRU */
9327 case IPOPT_TS_TSANDADDR:
9328 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
9329 break;
9330 default:
9331 /*
9332 * ip_*put_options should have already
9333 * dropped this packet.
9334 */
9335 cmn_err(CE_PANIC, "ip_input_local_options: "
9336 "unknown IT - bug in ip_input_options?\n");
9337 return (B_TRUE); /* Keep "lint" happy */
9338 }
9339 if (opt[IPOPT_OFFSET] - 1 + off > optlen) {
9340 /* Increase overflow counter */
9341 off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1;
9342 opt[IPOPT_POS_OV_FLG] =
9343 (uint8_t)((opt[IPOPT_POS_OV_FLG] & 0x0F) |
9344 (off << 4));
9345 break;
9346 }
9347 off = opt[IPOPT_OFFSET] - 1;
9348 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9349 case IPOPT_TS_PRESPEC:
9350 case IPOPT_TS_PRESPEC_RFC791:
9351 case IPOPT_TS_TSANDADDR:
9352 /* Pick a reasonable addr on the outbound if */
9353 if (ip_select_source_v4(ill, INADDR_ANY,
9354 ipha->ipha_dst, INADDR_ANY, ALL_ZONES, ipst,
9355 &ifaddr, NULL, NULL) != 0) {
9356 /* No source! Shouldn't happen */
9357 ifaddr = INADDR_ANY;
9358 }
9359 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9360 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9361 /* FALLTHRU */
9362 case IPOPT_TS_TSONLY:
9363 off = opt[IPOPT_OFFSET] - 1;
9364 /* Compute # of milliseconds since midnight */
9365 gethrestime(&now);
9366 ts = (now.tv_sec % (24 * 60 * 60)) * 1000 +
9367 NSEC2MSEC(now.tv_nsec);
9368 bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN);
9369 opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN;
9370 break;
9371 }
9372 break;
9373 }
9374 }
9375 return (B_TRUE);
9376
9377 bad_src_route:
9378 /* make sure we clear any indication of a hardware checksum */
9379 DB_CKSUMFLAGS(mp) = 0;
9380 ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ill);
9381 icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, ira);
9382 return (B_FALSE);
9383
9384 }
9385
9386 /*
9387 * Process IP options in an inbound packet. Always returns the nexthop.
9388 * Normally this is the passed in nexthop, but if there is an option
9389 * that effects the nexthop (such as a source route) that will be returned.
9390 * Sets *errorp if there is an error, in which case an ICMP error has been sent
9391 * and mp freed.
9392 */
9393 ipaddr_t
9394 ip_input_options(ipha_t *ipha, ipaddr_t dst, mblk_t *mp,
9395 ip_recv_attr_t *ira, int *errorp)
9396 {
9397 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
9398 ipoptp_t opts;
9399 uchar_t *opt;
9400 uint8_t optval;
9401 uint8_t optlen;
9402 intptr_t code = 0;
9403 ire_t *ire;
9404
9405 ip2dbg(("ip_input_options\n"));
9406 *errorp = 0;
9407 for (optval = ipoptp_first(&opts, ipha);
9408 optval != IPOPT_EOL;
9409 optval = ipoptp_next(&opts)) {
9410 opt = opts.ipoptp_cur;
9411 optlen = opts.ipoptp_len;
9412 ip2dbg(("ip_input_options: opt %d, len %d\n",
9413 optval, optlen));
9414 /*
9415 * Note: we need to verify the checksum before we
9416 * modify anything thus this routine only extracts the next
9417 * hop dst from any source route.
9418 */
9419 switch (optval) {
9420 uint32_t off;
9421 case IPOPT_SSRR:
9422 case IPOPT_LSRR:
9423 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
9424 if (optval == IPOPT_SSRR) {
9425 ip1dbg(("ip_input_options: not next"
9426 " strict source route 0x%x\n",
9427 ntohl(dst)));
9428 code = (char *)&ipha->ipha_dst -
9429 (char *)ipha;
9430 goto param_prob; /* RouterReq's */
9431 }
9432 ip2dbg(("ip_input_options: "
9433 "not next source route 0x%x\n",
9434 ntohl(dst)));
9435 break;
9436 }
9437
9438 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
9439 ip1dbg((
9440 "ip_input_options: bad option offset\n"));
9441 code = (char *)&opt[IPOPT_OLEN] -
9442 (char *)ipha;
9443 goto param_prob;
9444 }
9445 off = opt[IPOPT_OFFSET];
9446 off--;
9447 redo_srr:
9448 if (optlen < IP_ADDR_LEN ||
9449 off > optlen - IP_ADDR_LEN) {
9450 /* End of source route */
9451 ip1dbg(("ip_input_options: end of SR\n"));
9452 break;
9453 }
9454 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
9455 ip1dbg(("ip_input_options: next hop 0x%x\n",
9456 ntohl(dst)));
9457
9458 /*
9459 * Check if our address is present more than
9460 * once as consecutive hops in source route.
9461 * XXX verify per-interface ip_forwarding
9462 * for source route?
9463 */
9464 if (ip_type_v4(dst, ipst) == IRE_LOCAL) {
9465 off += IP_ADDR_LEN;
9466 goto redo_srr;
9467 }
9468
9469 if (dst == htonl(INADDR_LOOPBACK)) {
9470 ip1dbg(("ip_input_options: loopback addr in "
9471 "source route!\n"));
9472 goto bad_src_route;
9473 }
9474 /*
9475 * For strict: verify that dst is directly
9476 * reachable.
9477 */
9478 if (optval == IPOPT_SSRR) {
9479 ire = ire_ftable_lookup_v4(dst, 0, 0,
9480 IRE_INTERFACE, NULL, ALL_ZONES,
9481 ira->ira_tsl,
9482 MATCH_IRE_TYPE | MATCH_IRE_SECATTR, 0, ipst,
9483 NULL);
9484 if (ire == NULL) {
9485 ip1dbg(("ip_input_options: SSRR not "
9486 "directly reachable: 0x%x\n",
9487 ntohl(dst)));
9488 goto bad_src_route;
9489 }
9490 ire_refrele(ire);
9491 }
9492 /*
9493 * Defer update of the offset and the record route
9494 * until the packet is forwarded.
9495 */
9496 break;
9497 case IPOPT_RR:
9498 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
9499 ip1dbg((
9500 "ip_input_options: bad option offset\n"));
9501 code = (char *)&opt[IPOPT_OLEN] -
9502 (char *)ipha;
9503 goto param_prob;
9504 }
9505 break;
9506 case IPOPT_TS:
9507 /*
9508 * Verify that length >= 5 and that there is either
9509 * room for another timestamp or that the overflow
9510 * counter is not maxed out.
9511 */
9512 code = (char *)&opt[IPOPT_OLEN] - (char *)ipha;
9513 if (optlen < IPOPT_MINLEN_IT) {
9514 goto param_prob;
9515 }
9516 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
9517 ip1dbg((
9518 "ip_input_options: bad option offset\n"));
9519 code = (char *)&opt[IPOPT_OFFSET] -
9520 (char *)ipha;
9521 goto param_prob;
9522 }
9523 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9524 case IPOPT_TS_TSONLY:
9525 off = IPOPT_TS_TIMELEN;
9526 break;
9527 case IPOPT_TS_TSANDADDR:
9528 case IPOPT_TS_PRESPEC:
9529 case IPOPT_TS_PRESPEC_RFC791:
9530 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
9531 break;
9532 default:
9533 code = (char *)&opt[IPOPT_POS_OV_FLG] -
9534 (char *)ipha;
9535 goto param_prob;
9536 }
9537 if (opt[IPOPT_OFFSET] - 1 + off > optlen &&
9538 (opt[IPOPT_POS_OV_FLG] & 0xF0) == 0xF0) {
9539 /*
9540 * No room and the overflow counter is 15
9541 * already.
9542 */
9543 goto param_prob;
9544 }
9545 break;
9546 }
9547 }
9548
9549 if ((opts.ipoptp_flags & IPOPTP_ERROR) == 0) {
9550 return (dst);
9551 }
9552
9553 ip1dbg(("ip_input_options: error processing IP options."));
9554 code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha;
9555
9556 param_prob:
9557 /* make sure we clear any indication of a hardware checksum */
9558 DB_CKSUMFLAGS(mp) = 0;
9559 ip_drop_input("ICMP_PARAM_PROBLEM", mp, ira->ira_ill);
9560 icmp_param_problem(mp, (uint8_t)code, ira);
9561 *errorp = -1;
9562 return (dst);
9563
9564 bad_src_route:
9565 /* make sure we clear any indication of a hardware checksum */
9566 DB_CKSUMFLAGS(mp) = 0;
9567 ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ira->ira_ill);
9568 icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, ira);
9569 *errorp = -1;
9570 return (dst);
9571 }
9572
9573 /*
9574 * IP & ICMP info in >=14 msg's ...
9575 * - ip fixed part (mib2_ip_t)
9576 * - icmp fixed part (mib2_icmp_t)
9577 * - ipAddrEntryTable (ip 20) all IPv4 ipifs
9578 * - ipRouteEntryTable (ip 21) all IPv4 IREs
9579 * - ipNetToMediaEntryTable (ip 22) all IPv4 Neighbor Cache entries
9580 * - ipRouteAttributeTable (ip 102) labeled routes
9581 * - ip multicast membership (ip_member_t)
9582 * - ip multicast source filtering (ip_grpsrc_t)
9583 * - igmp fixed part (struct igmpstat)
9584 * - multicast routing stats (struct mrtstat)
9585 * - multicast routing vifs (array of struct vifctl)
9586 * - multicast routing routes (array of struct mfcctl)
9587 * - ip6 fixed part (mib2_ipv6IfStatsEntry_t)
9588 * One per ill plus one generic
9589 * - icmp6 fixed part (mib2_ipv6IfIcmpEntry_t)
9590 * One per ill plus one generic
9591 * - ipv6RouteEntry all IPv6 IREs
9592 * - ipv6RouteAttributeTable (ip6 102) labeled routes
9593 * - ipv6NetToMediaEntry all IPv6 Neighbor Cache entries
9594 * - ipv6AddrEntry all IPv6 ipifs
9595 * - ipv6 multicast membership (ipv6_member_t)
9596 * - ipv6 multicast source filtering (ipv6_grpsrc_t)
9597 *
9598 * NOTE: original mpctl is copied for msg's 2..N, since its ctl part is
9599 * already filled in by the caller.
9600 * If legacy_req is true then MIB structures needs to be truncated to their
9601 * legacy sizes before being returned.
9602 * Return value of 0 indicates that no messages were sent and caller
9603 * should free mpctl.
9604 */
9605 int
9606 ip_snmp_get(queue_t *q, mblk_t *mpctl, int level, boolean_t legacy_req)
9607 {
9608 ip_stack_t *ipst;
9609 sctp_stack_t *sctps;
9610
9611 if (q->q_next != NULL) {
9612 ipst = ILLQ_TO_IPST(q);
9613 } else {
9614 ipst = CONNQ_TO_IPST(q);
9615 }
9616 ASSERT(ipst != NULL);
9617 sctps = ipst->ips_netstack->netstack_sctp;
9618
9619 if (mpctl == NULL || mpctl->b_cont == NULL) {
9620 return (0);
9621 }
9622
9623 /*
9624 * For the purposes of the (broken) packet shell use
9625 * of the level we make sure MIB2_TCP/MIB2_UDP can be used
9626 * to make TCP and UDP appear first in the list of mib items.
9627 * TBD: We could expand this and use it in netstat so that
9628 * the kernel doesn't have to produce large tables (connections,
9629 * routes, etc) when netstat only wants the statistics or a particular
9630 * table.
9631 */
9632 if (!(level == MIB2_TCP || level == MIB2_UDP)) {
9633 if ((mpctl = icmp_snmp_get(q, mpctl)) == NULL) {
9634 return (1);
9635 }
9636 }
9637
9638 if (level != MIB2_TCP) {
9639 if ((mpctl = udp_snmp_get(q, mpctl, legacy_req)) == NULL) {
9640 return (1);
9641 }
9642 }
9643
9644 if (level != MIB2_UDP) {
9645 if ((mpctl = tcp_snmp_get(q, mpctl, legacy_req)) == NULL) {
9646 return (1);
9647 }
9648 }
9649
9650 if ((mpctl = ip_snmp_get_mib2_ip_traffic_stats(q, mpctl,
9651 ipst, legacy_req)) == NULL) {
9652 return (1);
9653 }
9654
9655 if ((mpctl = ip_snmp_get_mib2_ip6(q, mpctl, ipst,
9656 legacy_req)) == NULL) {
9657 return (1);
9658 }
9659
9660 if ((mpctl = ip_snmp_get_mib2_icmp(q, mpctl, ipst)) == NULL) {
9661 return (1);
9662 }
9663
9664 if ((mpctl = ip_snmp_get_mib2_icmp6(q, mpctl, ipst)) == NULL) {
9665 return (1);
9666 }
9667
9668 if ((mpctl = ip_snmp_get_mib2_igmp(q, mpctl, ipst)) == NULL) {
9669 return (1);
9670 }
9671
9672 if ((mpctl = ip_snmp_get_mib2_multi(q, mpctl, ipst)) == NULL) {
9673 return (1);
9674 }
9675
9676 if ((mpctl = ip_snmp_get_mib2_ip_addr(q, mpctl, ipst,
9677 legacy_req)) == NULL) {
9678 return (1);
9679 }
9680
9681 if ((mpctl = ip_snmp_get_mib2_ip6_addr(q, mpctl, ipst,
9682 legacy_req)) == NULL) {
9683 return (1);
9684 }
9685
9686 if ((mpctl = ip_snmp_get_mib2_ip_group_mem(q, mpctl, ipst)) == NULL) {
9687 return (1);
9688 }
9689
9690 if ((mpctl = ip_snmp_get_mib2_ip6_group_mem(q, mpctl, ipst)) == NULL) {
9691 return (1);
9692 }
9693
9694 if ((mpctl = ip_snmp_get_mib2_ip_group_src(q, mpctl, ipst)) == NULL) {
9695 return (1);
9696 }
9697
9698 if ((mpctl = ip_snmp_get_mib2_ip6_group_src(q, mpctl, ipst)) == NULL) {
9699 return (1);
9700 }
9701
9702 if ((mpctl = ip_snmp_get_mib2_virt_multi(q, mpctl, ipst)) == NULL) {
9703 return (1);
9704 }
9705
9706 if ((mpctl = ip_snmp_get_mib2_multi_rtable(q, mpctl, ipst)) == NULL) {
9707 return (1);
9708 }
9709
9710 mpctl = ip_snmp_get_mib2_ip_route_media(q, mpctl, level, ipst);
9711 if (mpctl == NULL)
9712 return (1);
9713
9714 mpctl = ip_snmp_get_mib2_ip6_route_media(q, mpctl, level, ipst);
9715 if (mpctl == NULL)
9716 return (1);
9717
9718 if ((mpctl = sctp_snmp_get_mib2(q, mpctl, sctps)) == NULL) {
9719 return (1);
9720 }
9721 if ((mpctl = ip_snmp_get_mib2_ip_dce(q, mpctl, ipst)) == NULL) {
9722 return (1);
9723 }
9724 freemsg(mpctl);
9725 return (1);
9726 }
9727
9728 /* Get global (legacy) IPv4 statistics */
9729 static mblk_t *
9730 ip_snmp_get_mib2_ip(queue_t *q, mblk_t *mpctl, mib2_ipIfStatsEntry_t *ipmib,
9731 ip_stack_t *ipst, boolean_t legacy_req)
9732 {
9733 mib2_ip_t old_ip_mib;
9734 struct opthdr *optp;
9735 mblk_t *mp2ctl;
9736 mib2_ipAddrEntry_t mae;
9737
9738 /*
9739 * make a copy of the original message
9740 */
9741 mp2ctl = copymsg(mpctl);
9742
9743 /* fixed length IP structure... */
9744 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9745 optp->level = MIB2_IP;
9746 optp->name = 0;
9747 SET_MIB(old_ip_mib.ipForwarding,
9748 (WE_ARE_FORWARDING(ipst) ? 1 : 2));
9749 SET_MIB(old_ip_mib.ipDefaultTTL,
9750 (uint32_t)ipst->ips_ip_def_ttl);
9751 SET_MIB(old_ip_mib.ipReasmTimeout,
9752 ipst->ips_ip_reassembly_timeout);
9753 SET_MIB(old_ip_mib.ipAddrEntrySize,
9754 (legacy_req) ? LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t) :
9755 sizeof (mib2_ipAddrEntry_t));
9756 SET_MIB(old_ip_mib.ipRouteEntrySize,
9757 sizeof (mib2_ipRouteEntry_t));
9758 SET_MIB(old_ip_mib.ipNetToMediaEntrySize,
9759 sizeof (mib2_ipNetToMediaEntry_t));
9760 SET_MIB(old_ip_mib.ipMemberEntrySize, sizeof (ip_member_t));
9761 SET_MIB(old_ip_mib.ipGroupSourceEntrySize, sizeof (ip_grpsrc_t));
9762 SET_MIB(old_ip_mib.ipRouteAttributeSize,
9763 sizeof (mib2_ipAttributeEntry_t));
9764 SET_MIB(old_ip_mib.transportMLPSize, sizeof (mib2_transportMLPEntry_t));
9765 SET_MIB(old_ip_mib.ipDestEntrySize, sizeof (dest_cache_entry_t));
9766
9767 /*
9768 * Grab the statistics from the new IP MIB
9769 */
9770 SET_MIB(old_ip_mib.ipInReceives,
9771 (uint32_t)ipmib->ipIfStatsHCInReceives);
9772 SET_MIB(old_ip_mib.ipInHdrErrors, ipmib->ipIfStatsInHdrErrors);
9773 SET_MIB(old_ip_mib.ipInAddrErrors, ipmib->ipIfStatsInAddrErrors);
9774 SET_MIB(old_ip_mib.ipForwDatagrams,
9775 (uint32_t)ipmib->ipIfStatsHCOutForwDatagrams);
9776 SET_MIB(old_ip_mib.ipInUnknownProtos,
9777 ipmib->ipIfStatsInUnknownProtos);
9778 SET_MIB(old_ip_mib.ipInDiscards, ipmib->ipIfStatsInDiscards);
9779 SET_MIB(old_ip_mib.ipInDelivers,
9780 (uint32_t)ipmib->ipIfStatsHCInDelivers);
9781 SET_MIB(old_ip_mib.ipOutRequests,
9782 (uint32_t)ipmib->ipIfStatsHCOutRequests);
9783 SET_MIB(old_ip_mib.ipOutDiscards, ipmib->ipIfStatsOutDiscards);
9784 SET_MIB(old_ip_mib.ipOutNoRoutes, ipmib->ipIfStatsOutNoRoutes);
9785 SET_MIB(old_ip_mib.ipReasmReqds, ipmib->ipIfStatsReasmReqds);
9786 SET_MIB(old_ip_mib.ipReasmOKs, ipmib->ipIfStatsReasmOKs);
9787 SET_MIB(old_ip_mib.ipReasmFails, ipmib->ipIfStatsReasmFails);
9788 SET_MIB(old_ip_mib.ipFragOKs, ipmib->ipIfStatsOutFragOKs);
9789 SET_MIB(old_ip_mib.ipFragFails, ipmib->ipIfStatsOutFragFails);
9790 SET_MIB(old_ip_mib.ipFragCreates, ipmib->ipIfStatsOutFragCreates);
9791
9792 /* ipRoutingDiscards is not being used */
9793 SET_MIB(old_ip_mib.ipRoutingDiscards, 0);
9794 SET_MIB(old_ip_mib.tcpInErrs, ipmib->tcpIfStatsInErrs);
9795 SET_MIB(old_ip_mib.udpNoPorts, ipmib->udpIfStatsNoPorts);
9796 SET_MIB(old_ip_mib.ipInCksumErrs, ipmib->ipIfStatsInCksumErrs);
9797 SET_MIB(old_ip_mib.ipReasmDuplicates,
9798 ipmib->ipIfStatsReasmDuplicates);
9799 SET_MIB(old_ip_mib.ipReasmPartDups, ipmib->ipIfStatsReasmPartDups);
9800 SET_MIB(old_ip_mib.ipForwProhibits, ipmib->ipIfStatsForwProhibits);
9801 SET_MIB(old_ip_mib.udpInCksumErrs, ipmib->udpIfStatsInCksumErrs);
9802 SET_MIB(old_ip_mib.udpInOverflows, ipmib->udpIfStatsInOverflows);
9803 SET_MIB(old_ip_mib.rawipInOverflows,
9804 ipmib->rawipIfStatsInOverflows);
9805
9806 SET_MIB(old_ip_mib.ipsecInSucceeded, ipmib->ipsecIfStatsInSucceeded);
9807 SET_MIB(old_ip_mib.ipsecInFailed, ipmib->ipsecIfStatsInFailed);
9808 SET_MIB(old_ip_mib.ipInIPv6, ipmib->ipIfStatsInWrongIPVersion);
9809 SET_MIB(old_ip_mib.ipOutIPv6, ipmib->ipIfStatsOutWrongIPVersion);
9810 SET_MIB(old_ip_mib.ipOutSwitchIPv6,
9811 ipmib->ipIfStatsOutSwitchIPVersion);
9812
9813 if (!snmp_append_data(mpctl->b_cont, (char *)&old_ip_mib,
9814 (int)sizeof (old_ip_mib))) {
9815 ip1dbg(("ip_snmp_get_mib2_ip: failed to allocate %u bytes\n",
9816 (uint_t)sizeof (old_ip_mib)));
9817 }
9818
9819 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9820 ip3dbg(("ip_snmp_get_mib2_ip: level %d, name %d, len %d\n",
9821 (int)optp->level, (int)optp->name, (int)optp->len));
9822 qreply(q, mpctl);
9823 return (mp2ctl);
9824 }
9825
9826 /* Per interface IPv4 statistics */
9827 static mblk_t *
9828 ip_snmp_get_mib2_ip_traffic_stats(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst,
9829 boolean_t legacy_req)
9830 {
9831 struct opthdr *optp;
9832 mblk_t *mp2ctl;
9833 ill_t *ill;
9834 ill_walk_context_t ctx;
9835 mblk_t *mp_tail = NULL;
9836 mib2_ipIfStatsEntry_t global_ip_mib;
9837 mib2_ipAddrEntry_t mae;
9838
9839 /*
9840 * Make a copy of the original message
9841 */
9842 mp2ctl = copymsg(mpctl);
9843
9844 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9845 optp->level = MIB2_IP;
9846 optp->name = MIB2_IP_TRAFFIC_STATS;
9847 /* Include "unknown interface" ip_mib */
9848 ipst->ips_ip_mib.ipIfStatsIPVersion = MIB2_INETADDRESSTYPE_ipv4;
9849 ipst->ips_ip_mib.ipIfStatsIfIndex =
9850 MIB2_UNKNOWN_INTERFACE; /* Flag to netstat */
9851 SET_MIB(ipst->ips_ip_mib.ipIfStatsForwarding,
9852 (ipst->ips_ip_forwarding ? 1 : 2));
9853 SET_MIB(ipst->ips_ip_mib.ipIfStatsDefaultTTL,
9854 (uint32_t)ipst->ips_ip_def_ttl);
9855 SET_MIB(ipst->ips_ip_mib.ipIfStatsEntrySize,
9856 sizeof (mib2_ipIfStatsEntry_t));
9857 SET_MIB(ipst->ips_ip_mib.ipIfStatsAddrEntrySize,
9858 sizeof (mib2_ipAddrEntry_t));
9859 SET_MIB(ipst->ips_ip_mib.ipIfStatsRouteEntrySize,
9860 sizeof (mib2_ipRouteEntry_t));
9861 SET_MIB(ipst->ips_ip_mib.ipIfStatsNetToMediaEntrySize,
9862 sizeof (mib2_ipNetToMediaEntry_t));
9863 SET_MIB(ipst->ips_ip_mib.ipIfStatsMemberEntrySize,
9864 sizeof (ip_member_t));
9865 SET_MIB(ipst->ips_ip_mib.ipIfStatsGroupSourceEntrySize,
9866 sizeof (ip_grpsrc_t));
9867
9868 bcopy(&ipst->ips_ip_mib, &global_ip_mib, sizeof (global_ip_mib));
9869
9870 if (legacy_req) {
9871 SET_MIB(global_ip_mib.ipIfStatsAddrEntrySize,
9872 LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t));
9873 }
9874
9875 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
9876 (char *)&global_ip_mib, (int)sizeof (global_ip_mib))) {
9877 ip1dbg(("ip_snmp_get_mib2_ip_traffic_stats: "
9878 "failed to allocate %u bytes\n",
9879 (uint_t)sizeof (global_ip_mib)));
9880 }
9881
9882 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
9883 ill = ILL_START_WALK_V4(&ctx, ipst);
9884 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
9885 ill->ill_ip_mib->ipIfStatsIfIndex =
9886 ill->ill_phyint->phyint_ifindex;
9887 SET_MIB(ill->ill_ip_mib->ipIfStatsForwarding,
9888 (ipst->ips_ip_forwarding ? 1 : 2));
9889 SET_MIB(ill->ill_ip_mib->ipIfStatsDefaultTTL,
9890 (uint32_t)ipst->ips_ip_def_ttl);
9891
9892 ip_mib2_add_ip_stats(&global_ip_mib, ill->ill_ip_mib);
9893 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
9894 (char *)ill->ill_ip_mib,
9895 (int)sizeof (*ill->ill_ip_mib))) {
9896 ip1dbg(("ip_snmp_get_mib2_ip_traffic_stats: "
9897 "failed to allocate %u bytes\n",
9898 (uint_t)sizeof (*ill->ill_ip_mib)));
9899 }
9900 }
9901 rw_exit(&ipst->ips_ill_g_lock);
9902
9903 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9904 ip3dbg(("ip_snmp_get_mib2_ip_traffic_stats: "
9905 "level %d, name %d, len %d\n",
9906 (int)optp->level, (int)optp->name, (int)optp->len));
9907 qreply(q, mpctl);
9908
9909 if (mp2ctl == NULL)
9910 return (NULL);
9911
9912 return (ip_snmp_get_mib2_ip(q, mp2ctl, &global_ip_mib, ipst,
9913 legacy_req));
9914 }
9915
9916 /* Global IPv4 ICMP statistics */
9917 static mblk_t *
9918 ip_snmp_get_mib2_icmp(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
9919 {
9920 struct opthdr *optp;
9921 mblk_t *mp2ctl;
9922
9923 /*
9924 * Make a copy of the original message
9925 */
9926 mp2ctl = copymsg(mpctl);
9927
9928 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9929 optp->level = MIB2_ICMP;
9930 optp->name = 0;
9931 if (!snmp_append_data(mpctl->b_cont, (char *)&ipst->ips_icmp_mib,
9932 (int)sizeof (ipst->ips_icmp_mib))) {
9933 ip1dbg(("ip_snmp_get_mib2_icmp: failed to allocate %u bytes\n",
9934 (uint_t)sizeof (ipst->ips_icmp_mib)));
9935 }
9936 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9937 ip3dbg(("ip_snmp_get_mib2_icmp: level %d, name %d, len %d\n",
9938 (int)optp->level, (int)optp->name, (int)optp->len));
9939 qreply(q, mpctl);
9940 return (mp2ctl);
9941 }
9942
9943 /* Global IPv4 IGMP statistics */
9944 static mblk_t *
9945 ip_snmp_get_mib2_igmp(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
9946 {
9947 struct opthdr *optp;
9948 mblk_t *mp2ctl;
9949
9950 /*
9951 * make a copy of the original message
9952 */
9953 mp2ctl = copymsg(mpctl);
9954
9955 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9956 optp->level = EXPER_IGMP;
9957 optp->name = 0;
9958 if (!snmp_append_data(mpctl->b_cont, (char *)&ipst->ips_igmpstat,
9959 (int)sizeof (ipst->ips_igmpstat))) {
9960 ip1dbg(("ip_snmp_get_mib2_igmp: failed to allocate %u bytes\n",
9961 (uint_t)sizeof (ipst->ips_igmpstat)));
9962 }
9963 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9964 ip3dbg(("ip_snmp_get_mib2_igmp: level %d, name %d, len %d\n",
9965 (int)optp->level, (int)optp->name, (int)optp->len));
9966 qreply(q, mpctl);
9967 return (mp2ctl);
9968 }
9969
9970 /* Global IPv4 Multicast Routing statistics */
9971 static mblk_t *
9972 ip_snmp_get_mib2_multi(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
9973 {
9974 struct opthdr *optp;
9975 mblk_t *mp2ctl;
9976
9977 /*
9978 * make a copy of the original message
9979 */
9980 mp2ctl = copymsg(mpctl);
9981
9982 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9983 optp->level = EXPER_DVMRP;
9984 optp->name = 0;
9985 if (!ip_mroute_stats(mpctl->b_cont, ipst)) {
9986 ip0dbg(("ip_mroute_stats: failed\n"));
9987 }
9988 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9989 ip3dbg(("ip_snmp_get_mib2_multi: level %d, name %d, len %d\n",
9990 (int)optp->level, (int)optp->name, (int)optp->len));
9991 qreply(q, mpctl);
9992 return (mp2ctl);
9993 }
9994
9995 /* IPv4 address information */
9996 static mblk_t *
9997 ip_snmp_get_mib2_ip_addr(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst,
9998 boolean_t legacy_req)
9999 {
10000 struct opthdr *optp;
10001 mblk_t *mp2ctl;
10002 mblk_t *mp_tail = NULL;
10003 ill_t *ill;
10004 ipif_t *ipif;
10005 uint_t bitval;
10006 mib2_ipAddrEntry_t mae;
10007 size_t mae_size;
10008 zoneid_t zoneid;
10009 ill_walk_context_t ctx;
10010
10011 /*
10012 * make a copy of the original message
10013 */
10014 mp2ctl = copymsg(mpctl);
10015
10016 mae_size = (legacy_req) ? LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t) :
10017 sizeof (mib2_ipAddrEntry_t);
10018
10019 /* ipAddrEntryTable */
10020
10021 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10022 optp->level = MIB2_IP;
10023 optp->name = MIB2_IP_ADDR;
10024 zoneid = Q_TO_CONN(q)->conn_zoneid;
10025
10026 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10027 ill = ILL_START_WALK_V4(&ctx, ipst);
10028 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10029 for (ipif = ill->ill_ipif; ipif != NULL;
10030 ipif = ipif->ipif_next) {
10031 if (ipif->ipif_zoneid != zoneid &&
10032 ipif->ipif_zoneid != ALL_ZONES)
10033 continue;
10034 /* Sum of count from dead IRE_LO* and our current */
10035 mae.ipAdEntInfo.ae_ibcnt = ipif->ipif_ib_pkt_count;
10036 if (ipif->ipif_ire_local != NULL) {
10037 mae.ipAdEntInfo.ae_ibcnt +=
10038 ipif->ipif_ire_local->ire_ib_pkt_count;
10039 }
10040 mae.ipAdEntInfo.ae_obcnt = 0;
10041 mae.ipAdEntInfo.ae_focnt = 0;
10042
10043 ipif_get_name(ipif, mae.ipAdEntIfIndex.o_bytes,
10044 OCTET_LENGTH);
10045 mae.ipAdEntIfIndex.o_length =
10046 mi_strlen(mae.ipAdEntIfIndex.o_bytes);
10047 mae.ipAdEntAddr = ipif->ipif_lcl_addr;
10048 mae.ipAdEntNetMask = ipif->ipif_net_mask;
10049 mae.ipAdEntInfo.ae_subnet = ipif->ipif_subnet;
10050 mae.ipAdEntInfo.ae_subnet_len =
10051 ip_mask_to_plen(ipif->ipif_net_mask);
10052 mae.ipAdEntInfo.ae_src_addr = ipif->ipif_lcl_addr;
10053 for (bitval = 1;
10054 bitval &&
10055 !(bitval & ipif->ipif_brd_addr);
10056 bitval <<= 1)
10057 noop;
10058 mae.ipAdEntBcastAddr = bitval;
10059 mae.ipAdEntReasmMaxSize = IP_MAXPACKET;
10060 mae.ipAdEntInfo.ae_mtu = ipif->ipif_ill->ill_mtu;
10061 mae.ipAdEntInfo.ae_metric = ipif->ipif_ill->ill_metric;
10062 mae.ipAdEntInfo.ae_broadcast_addr =
10063 ipif->ipif_brd_addr;
10064 mae.ipAdEntInfo.ae_pp_dst_addr =
10065 ipif->ipif_pp_dst_addr;
10066 mae.ipAdEntInfo.ae_flags = ipif->ipif_flags |
10067 ill->ill_flags | ill->ill_phyint->phyint_flags;
10068 mae.ipAdEntRetransmitTime =
10069 ill->ill_reachable_retrans_time;
10070
10071 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10072 (char *)&mae, (int)mae_size)) {
10073 ip1dbg(("ip_snmp_get_mib2_ip_addr: failed to "
10074 "allocate %u bytes\n", (uint_t)mae_size));
10075 }
10076 }
10077 }
10078 rw_exit(&ipst->ips_ill_g_lock);
10079
10080 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10081 ip3dbg(("ip_snmp_get_mib2_ip_addr: level %d, name %d, len %d\n",
10082 (int)optp->level, (int)optp->name, (int)optp->len));
10083 qreply(q, mpctl);
10084 return (mp2ctl);
10085 }
10086
10087 /* IPv6 address information */
10088 static mblk_t *
10089 ip_snmp_get_mib2_ip6_addr(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst,
10090 boolean_t legacy_req)
10091 {
10092 struct opthdr *optp;
10093 mblk_t *mp2ctl;
10094 mblk_t *mp_tail = NULL;
10095 ill_t *ill;
10096 ipif_t *ipif;
10097 mib2_ipv6AddrEntry_t mae6;
10098 size_t mae6_size;
10099 zoneid_t zoneid;
10100 ill_walk_context_t ctx;
10101
10102 /*
10103 * make a copy of the original message
10104 */
10105 mp2ctl = copymsg(mpctl);
10106
10107 mae6_size = (legacy_req) ?
10108 LEGACY_MIB_SIZE(&mae6, mib2_ipv6AddrEntry_t) :
10109 sizeof (mib2_ipv6AddrEntry_t);
10110
10111 /* ipv6AddrEntryTable */
10112
10113 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10114 optp->level = MIB2_IP6;
10115 optp->name = MIB2_IP6_ADDR;
10116 zoneid = Q_TO_CONN(q)->conn_zoneid;
10117
10118 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10119 ill = ILL_START_WALK_V6(&ctx, ipst);
10120 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10121 for (ipif = ill->ill_ipif; ipif != NULL;
10122 ipif = ipif->ipif_next) {
10123 if (ipif->ipif_zoneid != zoneid &&
10124 ipif->ipif_zoneid != ALL_ZONES)
10125 continue;
10126 /* Sum of count from dead IRE_LO* and our current */
10127 mae6.ipv6AddrInfo.ae_ibcnt = ipif->ipif_ib_pkt_count;
10128 if (ipif->ipif_ire_local != NULL) {
10129 mae6.ipv6AddrInfo.ae_ibcnt +=
10130 ipif->ipif_ire_local->ire_ib_pkt_count;
10131 }
10132 mae6.ipv6AddrInfo.ae_obcnt = 0;
10133 mae6.ipv6AddrInfo.ae_focnt = 0;
10134
10135 ipif_get_name(ipif, mae6.ipv6AddrIfIndex.o_bytes,
10136 OCTET_LENGTH);
10137 mae6.ipv6AddrIfIndex.o_length =
10138 mi_strlen(mae6.ipv6AddrIfIndex.o_bytes);
10139 mae6.ipv6AddrAddress = ipif->ipif_v6lcl_addr;
10140 mae6.ipv6AddrPfxLength =
10141 ip_mask_to_plen_v6(&ipif->ipif_v6net_mask);
10142 mae6.ipv6AddrInfo.ae_subnet = ipif->ipif_v6subnet;
10143 mae6.ipv6AddrInfo.ae_subnet_len =
10144 mae6.ipv6AddrPfxLength;
10145 mae6.ipv6AddrInfo.ae_src_addr = ipif->ipif_v6lcl_addr;
10146
10147 /* Type: stateless(1), stateful(2), unknown(3) */
10148 if (ipif->ipif_flags & IPIF_ADDRCONF)
10149 mae6.ipv6AddrType = 1;
10150 else
10151 mae6.ipv6AddrType = 2;
10152 /* Anycast: true(1), false(2) */
10153 if (ipif->ipif_flags & IPIF_ANYCAST)
10154 mae6.ipv6AddrAnycastFlag = 1;
10155 else
10156 mae6.ipv6AddrAnycastFlag = 2;
10157
10158 /*
10159 * Address status: preferred(1), deprecated(2),
10160 * invalid(3), inaccessible(4), unknown(5)
10161 */
10162 if (ipif->ipif_flags & IPIF_NOLOCAL)
10163 mae6.ipv6AddrStatus = 3;
10164 else if (ipif->ipif_flags & IPIF_DEPRECATED)
10165 mae6.ipv6AddrStatus = 2;
10166 else
10167 mae6.ipv6AddrStatus = 1;
10168 mae6.ipv6AddrInfo.ae_mtu = ipif->ipif_ill->ill_mtu;
10169 mae6.ipv6AddrInfo.ae_metric =
10170 ipif->ipif_ill->ill_metric;
10171 mae6.ipv6AddrInfo.ae_pp_dst_addr =
10172 ipif->ipif_v6pp_dst_addr;
10173 mae6.ipv6AddrInfo.ae_flags = ipif->ipif_flags |
10174 ill->ill_flags | ill->ill_phyint->phyint_flags;
10175 mae6.ipv6AddrReasmMaxSize = IP_MAXPACKET;
10176 mae6.ipv6AddrIdentifier = ill->ill_token;
10177 mae6.ipv6AddrIdentifierLen = ill->ill_token_length;
10178 mae6.ipv6AddrReachableTime = ill->ill_reachable_time;
10179 mae6.ipv6AddrRetransmitTime =
10180 ill->ill_reachable_retrans_time;
10181 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10182 (char *)&mae6, (int)mae6_size)) {
10183 ip1dbg(("ip_snmp_get_mib2_ip6_addr: failed to "
10184 "allocate %u bytes\n",
10185 (uint_t)mae6_size));
10186 }
10187 }
10188 }
10189 rw_exit(&ipst->ips_ill_g_lock);
10190
10191 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10192 ip3dbg(("ip_snmp_get_mib2_ip6_addr: level %d, name %d, len %d\n",
10193 (int)optp->level, (int)optp->name, (int)optp->len));
10194 qreply(q, mpctl);
10195 return (mp2ctl);
10196 }
10197
10198 /* IPv4 multicast group membership. */
10199 static mblk_t *
10200 ip_snmp_get_mib2_ip_group_mem(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10201 {
10202 struct opthdr *optp;
10203 mblk_t *mp2ctl;
10204 ill_t *ill;
10205 ipif_t *ipif;
10206 ilm_t *ilm;
10207 ip_member_t ipm;
10208 mblk_t *mp_tail = NULL;
10209 ill_walk_context_t ctx;
10210 zoneid_t zoneid;
10211
10212 /*
10213 * make a copy of the original message
10214 */
10215 mp2ctl = copymsg(mpctl);
10216 zoneid = Q_TO_CONN(q)->conn_zoneid;
10217
10218 /* ipGroupMember table */
10219 optp = (struct opthdr *)&mpctl->b_rptr[
10220 sizeof (struct T_optmgmt_ack)];
10221 optp->level = MIB2_IP;
10222 optp->name = EXPER_IP_GROUP_MEMBERSHIP;
10223
10224 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10225 ill = ILL_START_WALK_V4(&ctx, ipst);
10226 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10227 /* Make sure the ill isn't going away. */
10228 if (!ill_check_and_refhold(ill))
10229 continue;
10230 rw_exit(&ipst->ips_ill_g_lock);
10231 rw_enter(&ill->ill_mcast_lock, RW_READER);
10232 for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) {
10233 if (ilm->ilm_zoneid != zoneid &&
10234 ilm->ilm_zoneid != ALL_ZONES)
10235 continue;
10236
10237 /* Is there an ipif for ilm_ifaddr? */
10238 for (ipif = ill->ill_ipif; ipif != NULL;
10239 ipif = ipif->ipif_next) {
10240 if (!IPIF_IS_CONDEMNED(ipif) &&
10241 ipif->ipif_lcl_addr == ilm->ilm_ifaddr &&
10242 ilm->ilm_ifaddr != INADDR_ANY)
10243 break;
10244 }
10245 if (ipif != NULL) {
10246 ipif_get_name(ipif,
10247 ipm.ipGroupMemberIfIndex.o_bytes,
10248 OCTET_LENGTH);
10249 } else {
10250 ill_get_name(ill,
10251 ipm.ipGroupMemberIfIndex.o_bytes,
10252 OCTET_LENGTH);
10253 }
10254 ipm.ipGroupMemberIfIndex.o_length =
10255 mi_strlen(ipm.ipGroupMemberIfIndex.o_bytes);
10256
10257 ipm.ipGroupMemberAddress = ilm->ilm_addr;
10258 ipm.ipGroupMemberRefCnt = ilm->ilm_refcnt;
10259 ipm.ipGroupMemberFilterMode = ilm->ilm_fmode;
10260 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10261 (char *)&ipm, (int)sizeof (ipm))) {
10262 ip1dbg(("ip_snmp_get_mib2_ip_group: "
10263 "failed to allocate %u bytes\n",
10264 (uint_t)sizeof (ipm)));
10265 }
10266 }
10267 rw_exit(&ill->ill_mcast_lock);
10268 ill_refrele(ill);
10269 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10270 }
10271 rw_exit(&ipst->ips_ill_g_lock);
10272 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10273 ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n",
10274 (int)optp->level, (int)optp->name, (int)optp->len));
10275 qreply(q, mpctl);
10276 return (mp2ctl);
10277 }
10278
10279 /* IPv6 multicast group membership. */
10280 static mblk_t *
10281 ip_snmp_get_mib2_ip6_group_mem(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10282 {
10283 struct opthdr *optp;
10284 mblk_t *mp2ctl;
10285 ill_t *ill;
10286 ilm_t *ilm;
10287 ipv6_member_t ipm6;
10288 mblk_t *mp_tail = NULL;
10289 ill_walk_context_t ctx;
10290 zoneid_t zoneid;
10291
10292 /*
10293 * make a copy of the original message
10294 */
10295 mp2ctl = copymsg(mpctl);
10296 zoneid = Q_TO_CONN(q)->conn_zoneid;
10297
10298 /* ip6GroupMember table */
10299 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10300 optp->level = MIB2_IP6;
10301 optp->name = EXPER_IP6_GROUP_MEMBERSHIP;
10302
10303 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10304 ill = ILL_START_WALK_V6(&ctx, ipst);
10305 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10306 /* Make sure the ill isn't going away. */
10307 if (!ill_check_and_refhold(ill))
10308 continue;
10309 rw_exit(&ipst->ips_ill_g_lock);
10310 /*
10311 * Normally we don't have any members on under IPMP interfaces.
10312 * We report them as a debugging aid.
10313 */
10314 rw_enter(&ill->ill_mcast_lock, RW_READER);
10315 ipm6.ipv6GroupMemberIfIndex = ill->ill_phyint->phyint_ifindex;
10316 for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) {
10317 if (ilm->ilm_zoneid != zoneid &&
10318 ilm->ilm_zoneid != ALL_ZONES)
10319 continue; /* not this zone */
10320 ipm6.ipv6GroupMemberAddress = ilm->ilm_v6addr;
10321 ipm6.ipv6GroupMemberRefCnt = ilm->ilm_refcnt;
10322 ipm6.ipv6GroupMemberFilterMode = ilm->ilm_fmode;
10323 if (!snmp_append_data2(mpctl->b_cont,
10324 &mp_tail,
10325 (char *)&ipm6, (int)sizeof (ipm6))) {
10326 ip1dbg(("ip_snmp_get_mib2_ip6_group: "
10327 "failed to allocate %u bytes\n",
10328 (uint_t)sizeof (ipm6)));
10329 }
10330 }
10331 rw_exit(&ill->ill_mcast_lock);
10332 ill_refrele(ill);
10333 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10334 }
10335 rw_exit(&ipst->ips_ill_g_lock);
10336
10337 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10338 ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n",
10339 (int)optp->level, (int)optp->name, (int)optp->len));
10340 qreply(q, mpctl);
10341 return (mp2ctl);
10342 }
10343
10344 /* IP multicast filtered sources */
10345 static mblk_t *
10346 ip_snmp_get_mib2_ip_group_src(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10347 {
10348 struct opthdr *optp;
10349 mblk_t *mp2ctl;
10350 ill_t *ill;
10351 ipif_t *ipif;
10352 ilm_t *ilm;
10353 ip_grpsrc_t ips;
10354 mblk_t *mp_tail = NULL;
10355 ill_walk_context_t ctx;
10356 zoneid_t zoneid;
10357 int i;
10358 slist_t *sl;
10359
10360 /*
10361 * make a copy of the original message
10362 */
10363 mp2ctl = copymsg(mpctl);
10364 zoneid = Q_TO_CONN(q)->conn_zoneid;
10365
10366 /* ipGroupSource table */
10367 optp = (struct opthdr *)&mpctl->b_rptr[
10368 sizeof (struct T_optmgmt_ack)];
10369 optp->level = MIB2_IP;
10370 optp->name = EXPER_IP_GROUP_SOURCES;
10371
10372 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10373 ill = ILL_START_WALK_V4(&ctx, ipst);
10374 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10375 /* Make sure the ill isn't going away. */
10376 if (!ill_check_and_refhold(ill))
10377 continue;
10378 rw_exit(&ipst->ips_ill_g_lock);
10379 rw_enter(&ill->ill_mcast_lock, RW_READER);
10380 for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) {
10381 sl = ilm->ilm_filter;
10382 if (ilm->ilm_zoneid != zoneid &&
10383 ilm->ilm_zoneid != ALL_ZONES)
10384 continue;
10385 if (SLIST_IS_EMPTY(sl))
10386 continue;
10387
10388 /* Is there an ipif for ilm_ifaddr? */
10389 for (ipif = ill->ill_ipif; ipif != NULL;
10390 ipif = ipif->ipif_next) {
10391 if (!IPIF_IS_CONDEMNED(ipif) &&
10392 ipif->ipif_lcl_addr == ilm->ilm_ifaddr &&
10393 ilm->ilm_ifaddr != INADDR_ANY)
10394 break;
10395 }
10396 if (ipif != NULL) {
10397 ipif_get_name(ipif,
10398 ips.ipGroupSourceIfIndex.o_bytes,
10399 OCTET_LENGTH);
10400 } else {
10401 ill_get_name(ill,
10402 ips.ipGroupSourceIfIndex.o_bytes,
10403 OCTET_LENGTH);
10404 }
10405 ips.ipGroupSourceIfIndex.o_length =
10406 mi_strlen(ips.ipGroupSourceIfIndex.o_bytes);
10407
10408 ips.ipGroupSourceGroup = ilm->ilm_addr;
10409 for (i = 0; i < sl->sl_numsrc; i++) {
10410 if (!IN6_IS_ADDR_V4MAPPED(&sl->sl_addr[i]))
10411 continue;
10412 IN6_V4MAPPED_TO_IPADDR(&sl->sl_addr[i],
10413 ips.ipGroupSourceAddress);
10414 if (snmp_append_data2(mpctl->b_cont, &mp_tail,
10415 (char *)&ips, (int)sizeof (ips)) == 0) {
10416 ip1dbg(("ip_snmp_get_mib2_ip_group_src:"
10417 " failed to allocate %u bytes\n",
10418 (uint_t)sizeof (ips)));
10419 }
10420 }
10421 }
10422 rw_exit(&ill->ill_mcast_lock);
10423 ill_refrele(ill);
10424 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10425 }
10426 rw_exit(&ipst->ips_ill_g_lock);
10427 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10428 ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n",
10429 (int)optp->level, (int)optp->name, (int)optp->len));
10430 qreply(q, mpctl);
10431 return (mp2ctl);
10432 }
10433
10434 /* IPv6 multicast filtered sources. */
10435 static mblk_t *
10436 ip_snmp_get_mib2_ip6_group_src(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10437 {
10438 struct opthdr *optp;
10439 mblk_t *mp2ctl;
10440 ill_t *ill;
10441 ilm_t *ilm;
10442 ipv6_grpsrc_t ips6;
10443 mblk_t *mp_tail = NULL;
10444 ill_walk_context_t ctx;
10445 zoneid_t zoneid;
10446 int i;
10447 slist_t *sl;
10448
10449 /*
10450 * make a copy of the original message
10451 */
10452 mp2ctl = copymsg(mpctl);
10453 zoneid = Q_TO_CONN(q)->conn_zoneid;
10454
10455 /* ip6GroupMember table */
10456 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10457 optp->level = MIB2_IP6;
10458 optp->name = EXPER_IP6_GROUP_SOURCES;
10459
10460 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10461 ill = ILL_START_WALK_V6(&ctx, ipst);
10462 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10463 /* Make sure the ill isn't going away. */
10464 if (!ill_check_and_refhold(ill))
10465 continue;
10466 rw_exit(&ipst->ips_ill_g_lock);
10467 /*
10468 * Normally we don't have any members on under IPMP interfaces.
10469 * We report them as a debugging aid.
10470 */
10471 rw_enter(&ill->ill_mcast_lock, RW_READER);
10472 ips6.ipv6GroupSourceIfIndex = ill->ill_phyint->phyint_ifindex;
10473 for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) {
10474 sl = ilm->ilm_filter;
10475 if (ilm->ilm_zoneid != zoneid &&
10476 ilm->ilm_zoneid != ALL_ZONES)
10477 continue;
10478 if (SLIST_IS_EMPTY(sl))
10479 continue;
10480 ips6.ipv6GroupSourceGroup = ilm->ilm_v6addr;
10481 for (i = 0; i < sl->sl_numsrc; i++) {
10482 ips6.ipv6GroupSourceAddress = sl->sl_addr[i];
10483 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10484 (char *)&ips6, (int)sizeof (ips6))) {
10485 ip1dbg(("ip_snmp_get_mib2_ip6_"
10486 "group_src: failed to allocate "
10487 "%u bytes\n",
10488 (uint_t)sizeof (ips6)));
10489 }
10490 }
10491 }
10492 rw_exit(&ill->ill_mcast_lock);
10493 ill_refrele(ill);
10494 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10495 }
10496 rw_exit(&ipst->ips_ill_g_lock);
10497
10498 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10499 ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n",
10500 (int)optp->level, (int)optp->name, (int)optp->len));
10501 qreply(q, mpctl);
10502 return (mp2ctl);
10503 }
10504
10505 /* Multicast routing virtual interface table. */
10506 static mblk_t *
10507 ip_snmp_get_mib2_virt_multi(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10508 {
10509 struct opthdr *optp;
10510 mblk_t *mp2ctl;
10511
10512 /*
10513 * make a copy of the original message
10514 */
10515 mp2ctl = copymsg(mpctl);
10516
10517 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10518 optp->level = EXPER_DVMRP;
10519 optp->name = EXPER_DVMRP_VIF;
10520 if (!ip_mroute_vif(mpctl->b_cont, ipst)) {
10521 ip0dbg(("ip_mroute_vif: failed\n"));
10522 }
10523 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10524 ip3dbg(("ip_snmp_get_mib2_virt_multi: level %d, name %d, len %d\n",
10525 (int)optp->level, (int)optp->name, (int)optp->len));
10526 qreply(q, mpctl);
10527 return (mp2ctl);
10528 }
10529
10530 /* Multicast routing table. */
10531 static mblk_t *
10532 ip_snmp_get_mib2_multi_rtable(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10533 {
10534 struct opthdr *optp;
10535 mblk_t *mp2ctl;
10536
10537 /*
10538 * make a copy of the original message
10539 */
10540 mp2ctl = copymsg(mpctl);
10541
10542 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10543 optp->level = EXPER_DVMRP;
10544 optp->name = EXPER_DVMRP_MRT;
10545 if (!ip_mroute_mrt(mpctl->b_cont, ipst)) {
10546 ip0dbg(("ip_mroute_mrt: failed\n"));
10547 }
10548 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10549 ip3dbg(("ip_snmp_get_mib2_multi_rtable: level %d, name %d, len %d\n",
10550 (int)optp->level, (int)optp->name, (int)optp->len));
10551 qreply(q, mpctl);
10552 return (mp2ctl);
10553 }
10554
10555 /*
10556 * Return ipRouteEntryTable, ipNetToMediaEntryTable, and ipRouteAttributeTable
10557 * in one IRE walk.
10558 */
10559 static mblk_t *
10560 ip_snmp_get_mib2_ip_route_media(queue_t *q, mblk_t *mpctl, int level,
10561 ip_stack_t *ipst)
10562 {
10563 struct opthdr *optp;
10564 mblk_t *mp2ctl; /* Returned */
10565 mblk_t *mp3ctl; /* nettomedia */
10566 mblk_t *mp4ctl; /* routeattrs */
10567 iproutedata_t ird;
10568 zoneid_t zoneid;
10569
10570 /*
10571 * make copies of the original message
10572 * - mp2ctl is returned unchanged to the caller for his use
10573 * - mpctl is sent upstream as ipRouteEntryTable
10574 * - mp3ctl is sent upstream as ipNetToMediaEntryTable
10575 * - mp4ctl is sent upstream as ipRouteAttributeTable
10576 */
10577 mp2ctl = copymsg(mpctl);
10578 mp3ctl = copymsg(mpctl);
10579 mp4ctl = copymsg(mpctl);
10580 if (mp3ctl == NULL || mp4ctl == NULL) {
10581 freemsg(mp4ctl);
10582 freemsg(mp3ctl);
10583 freemsg(mp2ctl);
10584 freemsg(mpctl);
10585 return (NULL);
10586 }
10587
10588 bzero(&ird, sizeof (ird));
10589
10590 ird.ird_route.lp_head = mpctl->b_cont;
10591 ird.ird_netmedia.lp_head = mp3ctl->b_cont;
10592 ird.ird_attrs.lp_head = mp4ctl->b_cont;
10593 /*
10594 * If the level has been set the special EXPER_IP_AND_ALL_IRES value,
10595 * then also include ire_testhidden IREs and IRE_IF_CLONE. This is
10596 * intended a temporary solution until a proper MIB API is provided
10597 * that provides complete filtering/caller-opt-in.
10598 */
10599 if (level == EXPER_IP_AND_ALL_IRES)
10600 ird.ird_flags |= IRD_REPORT_ALL;
10601
10602 zoneid = Q_TO_CONN(q)->conn_zoneid;
10603 ire_walk_v4(ip_snmp_get2_v4, &ird, zoneid, ipst);
10604
10605 /* ipRouteEntryTable in mpctl */
10606 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10607 optp->level = MIB2_IP;
10608 optp->name = MIB2_IP_ROUTE;
10609 optp->len = msgdsize(ird.ird_route.lp_head);
10610 ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n",
10611 (int)optp->level, (int)optp->name, (int)optp->len));
10612 qreply(q, mpctl);
10613
10614 /* ipNetToMediaEntryTable in mp3ctl */
10615 ncec_walk(NULL, ip_snmp_get2_v4_media, &ird, ipst);
10616
10617 optp = (struct opthdr *)&mp3ctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10618 optp->level = MIB2_IP;
10619 optp->name = MIB2_IP_MEDIA;
10620 optp->len = msgdsize(ird.ird_netmedia.lp_head);
10621 ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n",
10622 (int)optp->level, (int)optp->name, (int)optp->len));
10623 qreply(q, mp3ctl);
10624
10625 /* ipRouteAttributeTable in mp4ctl */
10626 optp = (struct opthdr *)&mp4ctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10627 optp->level = MIB2_IP;
10628 optp->name = EXPER_IP_RTATTR;
10629 optp->len = msgdsize(ird.ird_attrs.lp_head);
10630 ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n",
10631 (int)optp->level, (int)optp->name, (int)optp->len));
10632 if (optp->len == 0)
10633 freemsg(mp4ctl);
10634 else
10635 qreply(q, mp4ctl);
10636
10637 return (mp2ctl);
10638 }
10639
10640 /*
10641 * Return ipv6RouteEntryTable and ipv6RouteAttributeTable in one IRE walk, and
10642 * ipv6NetToMediaEntryTable in an NDP walk.
10643 */
10644 static mblk_t *
10645 ip_snmp_get_mib2_ip6_route_media(queue_t *q, mblk_t *mpctl, int level,
10646 ip_stack_t *ipst)
10647 {
10648 struct opthdr *optp;
10649 mblk_t *mp2ctl; /* Returned */
10650 mblk_t *mp3ctl; /* nettomedia */
10651 mblk_t *mp4ctl; /* routeattrs */
10652 iproutedata_t ird;
10653 zoneid_t zoneid;
10654
10655 /*
10656 * make copies of the original message
10657 * - mp2ctl is returned unchanged to the caller for his use
10658 * - mpctl is sent upstream as ipv6RouteEntryTable
10659 * - mp3ctl is sent upstream as ipv6NetToMediaEntryTable
10660 * - mp4ctl is sent upstream as ipv6RouteAttributeTable
10661 */
10662 mp2ctl = copymsg(mpctl);
10663 mp3ctl = copymsg(mpctl);
10664 mp4ctl = copymsg(mpctl);
10665 if (mp3ctl == NULL || mp4ctl == NULL) {
10666 freemsg(mp4ctl);
10667 freemsg(mp3ctl);
10668 freemsg(mp2ctl);
10669 freemsg(mpctl);
10670 return (NULL);
10671 }
10672
10673 bzero(&ird, sizeof (ird));
10674
10675 ird.ird_route.lp_head = mpctl->b_cont;
10676 ird.ird_netmedia.lp_head = mp3ctl->b_cont;
10677 ird.ird_attrs.lp_head = mp4ctl->b_cont;
10678 /*
10679 * If the level has been set the special EXPER_IP_AND_ALL_IRES value,
10680 * then also include ire_testhidden IREs and IRE_IF_CLONE. This is
10681 * intended a temporary solution until a proper MIB API is provided
10682 * that provides complete filtering/caller-opt-in.
10683 */
10684 if (level == EXPER_IP_AND_ALL_IRES)
10685 ird.ird_flags |= IRD_REPORT_ALL;
10686
10687 zoneid = Q_TO_CONN(q)->conn_zoneid;
10688 ire_walk_v6(ip_snmp_get2_v6_route, &ird, zoneid, ipst);
10689
10690 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10691 optp->level = MIB2_IP6;
10692 optp->name = MIB2_IP6_ROUTE;
10693 optp->len = msgdsize(ird.ird_route.lp_head);
10694 ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n",
10695 (int)optp->level, (int)optp->name, (int)optp->len));
10696 qreply(q, mpctl);
10697
10698 /* ipv6NetToMediaEntryTable in mp3ctl */
10699 ncec_walk(NULL, ip_snmp_get2_v6_media, &ird, ipst);
10700
10701 optp = (struct opthdr *)&mp3ctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10702 optp->level = MIB2_IP6;
10703 optp->name = MIB2_IP6_MEDIA;
10704 optp->len = msgdsize(ird.ird_netmedia.lp_head);
10705 ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n",
10706 (int)optp->level, (int)optp->name, (int)optp->len));
10707 qreply(q, mp3ctl);
10708
10709 /* ipv6RouteAttributeTable in mp4ctl */
10710 optp = (struct opthdr *)&mp4ctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10711 optp->level = MIB2_IP6;
10712 optp->name = EXPER_IP_RTATTR;
10713 optp->len = msgdsize(ird.ird_attrs.lp_head);
10714 ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n",
10715 (int)optp->level, (int)optp->name, (int)optp->len));
10716 if (optp->len == 0)
10717 freemsg(mp4ctl);
10718 else
10719 qreply(q, mp4ctl);
10720
10721 return (mp2ctl);
10722 }
10723
10724 /*
10725 * IPv6 mib: One per ill
10726 */
10727 static mblk_t *
10728 ip_snmp_get_mib2_ip6(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst,
10729 boolean_t legacy_req)
10730 {
10731 struct opthdr *optp;
10732 mblk_t *mp2ctl;
10733 ill_t *ill;
10734 ill_walk_context_t ctx;
10735 mblk_t *mp_tail = NULL;
10736 mib2_ipv6AddrEntry_t mae6;
10737 mib2_ipIfStatsEntry_t *ise;
10738 size_t ise_size, iae_size;
10739
10740 /*
10741 * Make a copy of the original message
10742 */
10743 mp2ctl = copymsg(mpctl);
10744
10745 /* fixed length IPv6 structure ... */
10746
10747 if (legacy_req) {
10748 ise_size = LEGACY_MIB_SIZE(&ipst->ips_ip6_mib,
10749 mib2_ipIfStatsEntry_t);
10750 iae_size = LEGACY_MIB_SIZE(&mae6, mib2_ipv6AddrEntry_t);
10751 } else {
10752 ise_size = sizeof (mib2_ipIfStatsEntry_t);
10753 iae_size = sizeof (mib2_ipv6AddrEntry_t);
10754 }
10755
10756 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10757 optp->level = MIB2_IP6;
10758 optp->name = 0;
10759 /* Include "unknown interface" ip6_mib */
10760 ipst->ips_ip6_mib.ipIfStatsIPVersion = MIB2_INETADDRESSTYPE_ipv6;
10761 ipst->ips_ip6_mib.ipIfStatsIfIndex =
10762 MIB2_UNKNOWN_INTERFACE; /* Flag to netstat */
10763 SET_MIB(ipst->ips_ip6_mib.ipIfStatsForwarding,
10764 ipst->ips_ipv6_forwarding ? 1 : 2);
10765 SET_MIB(ipst->ips_ip6_mib.ipIfStatsDefaultHopLimit,
10766 ipst->ips_ipv6_def_hops);
10767 SET_MIB(ipst->ips_ip6_mib.ipIfStatsEntrySize,
10768 sizeof (mib2_ipIfStatsEntry_t));
10769 SET_MIB(ipst->ips_ip6_mib.ipIfStatsAddrEntrySize,
10770 sizeof (mib2_ipv6AddrEntry_t));
10771 SET_MIB(ipst->ips_ip6_mib.ipIfStatsRouteEntrySize,
10772 sizeof (mib2_ipv6RouteEntry_t));
10773 SET_MIB(ipst->ips_ip6_mib.ipIfStatsNetToMediaEntrySize,
10774 sizeof (mib2_ipv6NetToMediaEntry_t));
10775 SET_MIB(ipst->ips_ip6_mib.ipIfStatsMemberEntrySize,
10776 sizeof (ipv6_member_t));
10777 SET_MIB(ipst->ips_ip6_mib.ipIfStatsGroupSourceEntrySize,
10778 sizeof (ipv6_grpsrc_t));
10779
10780 /*
10781 * Synchronize 64- and 32-bit counters
10782 */
10783 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInReceives,
10784 ipIfStatsHCInReceives);
10785 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInDelivers,
10786 ipIfStatsHCInDelivers);
10787 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutRequests,
10788 ipIfStatsHCOutRequests);
10789 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutForwDatagrams,
10790 ipIfStatsHCOutForwDatagrams);
10791 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutMcastPkts,
10792 ipIfStatsHCOutMcastPkts);
10793 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInMcastPkts,
10794 ipIfStatsHCInMcastPkts);
10795
10796 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10797 (char *)&ipst->ips_ip6_mib, (int)ise_size)) {
10798 ip1dbg(("ip_snmp_get_mib2_ip6: failed to allocate %u bytes\n",
10799 (uint_t)ise_size));
10800 } else if (legacy_req) {
10801 /* Adjust the EntrySize fields for legacy requests. */
10802 ise =
10803 (mib2_ipIfStatsEntry_t *)(mp_tail->b_wptr - (int)ise_size);
10804 SET_MIB(ise->ipIfStatsEntrySize, ise_size);
10805 SET_MIB(ise->ipIfStatsAddrEntrySize, iae_size);
10806 }
10807
10808 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10809 ill = ILL_START_WALK_V6(&ctx, ipst);
10810 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10811 ill->ill_ip_mib->ipIfStatsIfIndex =
10812 ill->ill_phyint->phyint_ifindex;
10813 SET_MIB(ill->ill_ip_mib->ipIfStatsForwarding,
10814 ipst->ips_ipv6_forwarding ? 1 : 2);
10815 SET_MIB(ill->ill_ip_mib->ipIfStatsDefaultHopLimit,
10816 ill->ill_max_hops);
10817
10818 /*
10819 * Synchronize 64- and 32-bit counters
10820 */
10821 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInReceives,
10822 ipIfStatsHCInReceives);
10823 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInDelivers,
10824 ipIfStatsHCInDelivers);
10825 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutRequests,
10826 ipIfStatsHCOutRequests);
10827 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutForwDatagrams,
10828 ipIfStatsHCOutForwDatagrams);
10829 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutMcastPkts,
10830 ipIfStatsHCOutMcastPkts);
10831 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInMcastPkts,
10832 ipIfStatsHCInMcastPkts);
10833
10834 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10835 (char *)ill->ill_ip_mib, (int)ise_size)) {
10836 ip1dbg(("ip_snmp_get_mib2_ip6: failed to allocate "
10837 "%u bytes\n", (uint_t)ise_size));
10838 } else if (legacy_req) {
10839 /* Adjust the EntrySize fields for legacy requests. */
10840 ise = (mib2_ipIfStatsEntry_t *)(mp_tail->b_wptr -
10841 (int)ise_size);
10842 SET_MIB(ise->ipIfStatsEntrySize, ise_size);
10843 SET_MIB(ise->ipIfStatsAddrEntrySize, iae_size);
10844 }
10845 }
10846 rw_exit(&ipst->ips_ill_g_lock);
10847
10848 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10849 ip3dbg(("ip_snmp_get_mib2_ip6: level %d, name %d, len %d\n",
10850 (int)optp->level, (int)optp->name, (int)optp->len));
10851 qreply(q, mpctl);
10852 return (mp2ctl);
10853 }
10854
10855 /*
10856 * ICMPv6 mib: One per ill
10857 */
10858 static mblk_t *
10859 ip_snmp_get_mib2_icmp6(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10860 {
10861 struct opthdr *optp;
10862 mblk_t *mp2ctl;
10863 ill_t *ill;
10864 ill_walk_context_t ctx;
10865 mblk_t *mp_tail = NULL;
10866 /*
10867 * Make a copy of the original message
10868 */
10869 mp2ctl = copymsg(mpctl);
10870
10871 /* fixed length ICMPv6 structure ... */
10872
10873 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10874 optp->level = MIB2_ICMP6;
10875 optp->name = 0;
10876 /* Include "unknown interface" icmp6_mib */
10877 ipst->ips_icmp6_mib.ipv6IfIcmpIfIndex =
10878 MIB2_UNKNOWN_INTERFACE; /* netstat flag */
10879 ipst->ips_icmp6_mib.ipv6IfIcmpEntrySize =
10880 sizeof (mib2_ipv6IfIcmpEntry_t);
10881 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10882 (char *)&ipst->ips_icmp6_mib,
10883 (int)sizeof (ipst->ips_icmp6_mib))) {
10884 ip1dbg(("ip_snmp_get_mib2_icmp6: failed to allocate %u bytes\n",
10885 (uint_t)sizeof (ipst->ips_icmp6_mib)));
10886 }
10887
10888 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10889 ill = ILL_START_WALK_V6(&ctx, ipst);
10890 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10891 ill->ill_icmp6_mib->ipv6IfIcmpIfIndex =
10892 ill->ill_phyint->phyint_ifindex;
10893 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10894 (char *)ill->ill_icmp6_mib,
10895 (int)sizeof (*ill->ill_icmp6_mib))) {
10896 ip1dbg(("ip_snmp_get_mib2_icmp6: failed to allocate "
10897 "%u bytes\n",
10898 (uint_t)sizeof (*ill->ill_icmp6_mib)));
10899 }
10900 }
10901 rw_exit(&ipst->ips_ill_g_lock);
10902
10903 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10904 ip3dbg(("ip_snmp_get_mib2_icmp6: level %d, name %d, len %d\n",
10905 (int)optp->level, (int)optp->name, (int)optp->len));
10906 qreply(q, mpctl);
10907 return (mp2ctl);
10908 }
10909
10910 /*
10911 * ire_walk routine to create both ipRouteEntryTable and
10912 * ipRouteAttributeTable in one IRE walk
10913 */
10914 static void
10915 ip_snmp_get2_v4(ire_t *ire, iproutedata_t *ird)
10916 {
10917 ill_t *ill;
10918 mib2_ipRouteEntry_t *re;
10919 mib2_ipAttributeEntry_t iaes;
10920 tsol_ire_gw_secattr_t *attrp;
10921 tsol_gc_t *gc = NULL;
10922 tsol_gcgrp_t *gcgrp = NULL;
10923 ip_stack_t *ipst = ire->ire_ipst;
10924
10925 ASSERT(ire->ire_ipversion == IPV4_VERSION);
10926
10927 if (!(ird->ird_flags & IRD_REPORT_ALL)) {
10928 if (ire->ire_testhidden)
10929 return;
10930 if (ire->ire_type & IRE_IF_CLONE)
10931 return;
10932 }
10933
10934 if ((re = kmem_zalloc(sizeof (*re), KM_NOSLEEP)) == NULL)
10935 return;
10936
10937 if ((attrp = ire->ire_gw_secattr) != NULL) {
10938 mutex_enter(&attrp->igsa_lock);
10939 if ((gc = attrp->igsa_gc) != NULL) {
10940 gcgrp = gc->gc_grp;
10941 ASSERT(gcgrp != NULL);
10942 rw_enter(&gcgrp->gcgrp_rwlock, RW_READER);
10943 }
10944 mutex_exit(&attrp->igsa_lock);
10945 }
10946 /*
10947 * Return all IRE types for route table... let caller pick and choose
10948 */
10949 re->ipRouteDest = ire->ire_addr;
10950 ill = ire->ire_ill;
10951 re->ipRouteIfIndex.o_length = 0;
10952 if (ill != NULL) {
10953 ill_get_name(ill, re->ipRouteIfIndex.o_bytes, OCTET_LENGTH);
10954 re->ipRouteIfIndex.o_length =
10955 mi_strlen(re->ipRouteIfIndex.o_bytes);
10956 }
10957 re->ipRouteMetric1 = -1;
10958 re->ipRouteMetric2 = -1;
10959 re->ipRouteMetric3 = -1;
10960 re->ipRouteMetric4 = -1;
10961
10962 re->ipRouteNextHop = ire->ire_gateway_addr;
10963 /* indirect(4), direct(3), or invalid(2) */
10964 if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE))
10965 re->ipRouteType = 2;
10966 else if (ire->ire_type & IRE_ONLINK)
10967 re->ipRouteType = 3;
10968 else
10969 re->ipRouteType = 4;
10970
10971 re->ipRouteProto = -1;
10972 re->ipRouteAge = gethrestime_sec() - ire->ire_create_time;
10973 re->ipRouteMask = ire->ire_mask;
10974 re->ipRouteMetric5 = -1;
10975 re->ipRouteInfo.re_max_frag = ire->ire_metrics.iulp_mtu;
10976 if (ire->ire_ill != NULL && re->ipRouteInfo.re_max_frag == 0)
10977 re->ipRouteInfo.re_max_frag = ire->ire_ill->ill_mtu;
10978
10979 re->ipRouteInfo.re_frag_flag = 0;
10980 re->ipRouteInfo.re_rtt = 0;
10981 re->ipRouteInfo.re_src_addr = 0;
10982 re->ipRouteInfo.re_ref = ire->ire_refcnt;
10983 re->ipRouteInfo.re_obpkt = ire->ire_ob_pkt_count;
10984 re->ipRouteInfo.re_ibpkt = ire->ire_ib_pkt_count;
10985 re->ipRouteInfo.re_flags = ire->ire_flags;
10986
10987 /* Add the IRE_IF_CLONE's counters to their parent IRE_INTERFACE */
10988 if (ire->ire_type & IRE_INTERFACE) {
10989 ire_t *child;
10990
10991 rw_enter(&ipst->ips_ire_dep_lock, RW_READER);
10992 child = ire->ire_dep_children;
10993 while (child != NULL) {
10994 re->ipRouteInfo.re_obpkt += child->ire_ob_pkt_count;
10995 re->ipRouteInfo.re_ibpkt += child->ire_ib_pkt_count;
10996 child = child->ire_dep_sib_next;
10997 }
10998 rw_exit(&ipst->ips_ire_dep_lock);
10999 }
11000
11001 if (ire->ire_flags & RTF_DYNAMIC) {
11002 re->ipRouteInfo.re_ire_type = IRE_HOST_REDIRECT;
11003 } else {
11004 re->ipRouteInfo.re_ire_type = ire->ire_type;
11005 }
11006
11007 if (!snmp_append_data2(ird->ird_route.lp_head, &ird->ird_route.lp_tail,
11008 (char *)re, (int)sizeof (*re))) {
11009 ip1dbg(("ip_snmp_get2_v4: failed to allocate %u bytes\n",
11010 (uint_t)sizeof (*re)));
11011 }
11012
11013 if (gc != NULL) {
11014 iaes.iae_routeidx = ird->ird_idx;
11015 iaes.iae_doi = gc->gc_db->gcdb_doi;
11016 iaes.iae_slrange = gc->gc_db->gcdb_slrange;
11017
11018 if (!snmp_append_data2(ird->ird_attrs.lp_head,
11019 &ird->ird_attrs.lp_tail, (char *)&iaes, sizeof (iaes))) {
11020 ip1dbg(("ip_snmp_get2_v4: failed to allocate %u "
11021 "bytes\n", (uint_t)sizeof (iaes)));
11022 }
11023 }
11024
11025 /* bump route index for next pass */
11026 ird->ird_idx++;
11027
11028 kmem_free(re, sizeof (*re));
11029 if (gcgrp != NULL)
11030 rw_exit(&gcgrp->gcgrp_rwlock);
11031 }
11032
11033 /*
11034 * ire_walk routine to create ipv6RouteEntryTable and ipRouteEntryTable.
11035 */
11036 static void
11037 ip_snmp_get2_v6_route(ire_t *ire, iproutedata_t *ird)
11038 {
11039 ill_t *ill;
11040 mib2_ipv6RouteEntry_t *re;
11041 mib2_ipAttributeEntry_t iaes;
11042 tsol_ire_gw_secattr_t *attrp;
11043 tsol_gc_t *gc = NULL;
11044 tsol_gcgrp_t *gcgrp = NULL;
11045 ip_stack_t *ipst = ire->ire_ipst;
11046
11047 ASSERT(ire->ire_ipversion == IPV6_VERSION);
11048
11049 if (!(ird->ird_flags & IRD_REPORT_ALL)) {
11050 if (ire->ire_testhidden)
11051 return;
11052 if (ire->ire_type & IRE_IF_CLONE)
11053 return;
11054 }
11055
11056 if ((re = kmem_zalloc(sizeof (*re), KM_NOSLEEP)) == NULL)
11057 return;
11058
11059 if ((attrp = ire->ire_gw_secattr) != NULL) {
11060 mutex_enter(&attrp->igsa_lock);
11061 if ((gc = attrp->igsa_gc) != NULL) {
11062 gcgrp = gc->gc_grp;
11063 ASSERT(gcgrp != NULL);
11064 rw_enter(&gcgrp->gcgrp_rwlock, RW_READER);
11065 }
11066 mutex_exit(&attrp->igsa_lock);
11067 }
11068 /*
11069 * Return all IRE types for route table... let caller pick and choose
11070 */
11071 re->ipv6RouteDest = ire->ire_addr_v6;
11072 re->ipv6RoutePfxLength = ip_mask_to_plen_v6(&ire->ire_mask_v6);
11073 re->ipv6RouteIndex = 0; /* Unique when multiple with same dest/plen */
11074 re->ipv6RouteIfIndex.o_length = 0;
11075 ill = ire->ire_ill;
11076 if (ill != NULL) {
11077 ill_get_name(ill, re->ipv6RouteIfIndex.o_bytes, OCTET_LENGTH);
11078 re->ipv6RouteIfIndex.o_length =
11079 mi_strlen(re->ipv6RouteIfIndex.o_bytes);
11080 }
11081
11082 ASSERT(!(ire->ire_type & IRE_BROADCAST));
11083
11084 mutex_enter(&ire->ire_lock);
11085 re->ipv6RouteNextHop = ire->ire_gateway_addr_v6;
11086 mutex_exit(&ire->ire_lock);
11087
11088 /* remote(4), local(3), or discard(2) */
11089 if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE))
11090 re->ipv6RouteType = 2;
11091 else if (ire->ire_type & IRE_ONLINK)
11092 re->ipv6RouteType = 3;
11093 else
11094 re->ipv6RouteType = 4;
11095
11096 re->ipv6RouteProtocol = -1;
11097 re->ipv6RoutePolicy = 0;
11098 re->ipv6RouteAge = gethrestime_sec() - ire->ire_create_time;
11099 re->ipv6RouteNextHopRDI = 0;
11100 re->ipv6RouteWeight = 0;
11101 re->ipv6RouteMetric = 0;
11102 re->ipv6RouteInfo.re_max_frag = ire->ire_metrics.iulp_mtu;
11103 if (ire->ire_ill != NULL && re->ipv6RouteInfo.re_max_frag == 0)
11104 re->ipv6RouteInfo.re_max_frag = ire->ire_ill->ill_mtu;
11105
11106 re->ipv6RouteInfo.re_frag_flag = 0;
11107 re->ipv6RouteInfo.re_rtt = 0;
11108 re->ipv6RouteInfo.re_src_addr = ipv6_all_zeros;
11109 re->ipv6RouteInfo.re_obpkt = ire->ire_ob_pkt_count;
11110 re->ipv6RouteInfo.re_ibpkt = ire->ire_ib_pkt_count;
11111 re->ipv6RouteInfo.re_ref = ire->ire_refcnt;
11112 re->ipv6RouteInfo.re_flags = ire->ire_flags;
11113
11114 /* Add the IRE_IF_CLONE's counters to their parent IRE_INTERFACE */
11115 if (ire->ire_type & IRE_INTERFACE) {
11116 ire_t *child;
11117
11118 rw_enter(&ipst->ips_ire_dep_lock, RW_READER);
11119 child = ire->ire_dep_children;
11120 while (child != NULL) {
11121 re->ipv6RouteInfo.re_obpkt += child->ire_ob_pkt_count;
11122 re->ipv6RouteInfo.re_ibpkt += child->ire_ib_pkt_count;
11123 child = child->ire_dep_sib_next;
11124 }
11125 rw_exit(&ipst->ips_ire_dep_lock);
11126 }
11127 if (ire->ire_flags & RTF_DYNAMIC) {
11128 re->ipv6RouteInfo.re_ire_type = IRE_HOST_REDIRECT;
11129 } else {
11130 re->ipv6RouteInfo.re_ire_type = ire->ire_type;
11131 }
11132
11133 if (!snmp_append_data2(ird->ird_route.lp_head, &ird->ird_route.lp_tail,
11134 (char *)re, (int)sizeof (*re))) {
11135 ip1dbg(("ip_snmp_get2_v6: failed to allocate %u bytes\n",
11136 (uint_t)sizeof (*re)));
11137 }
11138
11139 if (gc != NULL) {
11140 iaes.iae_routeidx = ird->ird_idx;
11141 iaes.iae_doi = gc->gc_db->gcdb_doi;
11142 iaes.iae_slrange = gc->gc_db->gcdb_slrange;
11143
11144 if (!snmp_append_data2(ird->ird_attrs.lp_head,
11145 &ird->ird_attrs.lp_tail, (char *)&iaes, sizeof (iaes))) {
11146 ip1dbg(("ip_snmp_get2_v6: failed to allocate %u "
11147 "bytes\n", (uint_t)sizeof (iaes)));
11148 }
11149 }
11150
11151 /* bump route index for next pass */
11152 ird->ird_idx++;
11153
11154 kmem_free(re, sizeof (*re));
11155 if (gcgrp != NULL)
11156 rw_exit(&gcgrp->gcgrp_rwlock);
11157 }
11158
11159 /*
11160 * ncec_walk routine to create ipv6NetToMediaEntryTable
11161 */
11162 static int
11163 ip_snmp_get2_v6_media(ncec_t *ncec, iproutedata_t *ird)
11164 {
11165 ill_t *ill;
11166 mib2_ipv6NetToMediaEntry_t ntme;
11167
11168 ill = ncec->ncec_ill;
11169 /* skip arpce entries, and loopback ncec entries */
11170 if (ill->ill_isv6 == B_FALSE || ill->ill_net_type == IRE_LOOPBACK)
11171 return (0);
11172 /*
11173 * Neighbor cache entry attached to IRE with on-link
11174 * destination.
11175 * We report all IPMP groups on ncec_ill which is normally the upper.
11176 */
11177 ntme.ipv6NetToMediaIfIndex = ill->ill_phyint->phyint_ifindex;
11178 ntme.ipv6NetToMediaNetAddress = ncec->ncec_addr;
11179 ntme.ipv6NetToMediaPhysAddress.o_length = ill->ill_phys_addr_length;
11180 if (ncec->ncec_lladdr != NULL) {
11181 bcopy(ncec->ncec_lladdr, ntme.ipv6NetToMediaPhysAddress.o_bytes,
11182 ntme.ipv6NetToMediaPhysAddress.o_length);
11183 }
11184 /*
11185 * Note: Returns ND_* states. Should be:
11186 * reachable(1), stale(2), delay(3), probe(4),
11187 * invalid(5), unknown(6)
11188 */
11189 ntme.ipv6NetToMediaState = ncec->ncec_state;
11190 ntme.ipv6NetToMediaLastUpdated = 0;
11191
11192 /* other(1), dynamic(2), static(3), local(4) */
11193 if (NCE_MYADDR(ncec)) {
11194 ntme.ipv6NetToMediaType = 4;
11195 } else if (ncec->ncec_flags & NCE_F_PUBLISH) {
11196 ntme.ipv6NetToMediaType = 1; /* proxy */
11197 } else if (ncec->ncec_flags & NCE_F_STATIC) {
11198 ntme.ipv6NetToMediaType = 3;
11199 } else if (ncec->ncec_flags & (NCE_F_MCAST|NCE_F_BCAST)) {
11200 ntme.ipv6NetToMediaType = 1;
11201 } else {
11202 ntme.ipv6NetToMediaType = 2;
11203 }
11204
11205 if (!snmp_append_data2(ird->ird_netmedia.lp_head,
11206 &ird->ird_netmedia.lp_tail, (char *)&ntme, sizeof (ntme))) {
11207 ip1dbg(("ip_snmp_get2_v6_media: failed to allocate %u bytes\n",
11208 (uint_t)sizeof (ntme)));
11209 }
11210 return (0);
11211 }
11212
11213 int
11214 nce2ace(ncec_t *ncec)
11215 {
11216 int flags = 0;
11217
11218 if (NCE_ISREACHABLE(ncec))
11219 flags |= ACE_F_RESOLVED;
11220 if (ncec->ncec_flags & NCE_F_AUTHORITY)
11221 flags |= ACE_F_AUTHORITY;
11222 if (ncec->ncec_flags & NCE_F_PUBLISH)
11223 flags |= ACE_F_PUBLISH;
11224 if ((ncec->ncec_flags & NCE_F_NONUD) != 0)
11225 flags |= ACE_F_PERMANENT;
11226 if (NCE_MYADDR(ncec))
11227 flags |= (ACE_F_MYADDR | ACE_F_AUTHORITY);
11228 if (ncec->ncec_flags & NCE_F_UNVERIFIED)
11229 flags |= ACE_F_UNVERIFIED;
11230 if (ncec->ncec_flags & NCE_F_AUTHORITY)
11231 flags |= ACE_F_AUTHORITY;
11232 if (ncec->ncec_flags & NCE_F_DELAYED)
11233 flags |= ACE_F_DELAYED;
11234 return (flags);
11235 }
11236
11237 /*
11238 * ncec_walk routine to create ipNetToMediaEntryTable
11239 */
11240 static int
11241 ip_snmp_get2_v4_media(ncec_t *ncec, iproutedata_t *ird)
11242 {
11243 ill_t *ill;
11244 mib2_ipNetToMediaEntry_t ntme;
11245 const char *name = "unknown";
11246 ipaddr_t ncec_addr;
11247
11248 ill = ncec->ncec_ill;
11249 if (ill->ill_isv6 || (ncec->ncec_flags & NCE_F_BCAST) ||
11250 ill->ill_net_type == IRE_LOOPBACK)
11251 return (0);
11252
11253 /* We report all IPMP groups on ncec_ill which is normally the upper. */
11254 name = ill->ill_name;
11255 /* Based on RFC 4293: other(1), inval(2), dyn(3), stat(4) */
11256 if (NCE_MYADDR(ncec)) {
11257 ntme.ipNetToMediaType = 4;
11258 } else if (ncec->ncec_flags & (NCE_F_MCAST|NCE_F_BCAST|NCE_F_PUBLISH)) {
11259 ntme.ipNetToMediaType = 1;
11260 } else {
11261 ntme.ipNetToMediaType = 3;
11262 }
11263 ntme.ipNetToMediaIfIndex.o_length = MIN(OCTET_LENGTH, strlen(name));
11264 bcopy(name, ntme.ipNetToMediaIfIndex.o_bytes,
11265 ntme.ipNetToMediaIfIndex.o_length);
11266
11267 IN6_V4MAPPED_TO_IPADDR(&ncec->ncec_addr, ncec_addr);
11268 bcopy(&ncec_addr, &ntme.ipNetToMediaNetAddress, sizeof (ncec_addr));
11269
11270 ntme.ipNetToMediaInfo.ntm_mask.o_length = sizeof (ipaddr_t);
11271 ncec_addr = INADDR_BROADCAST;
11272 bcopy(&ncec_addr, ntme.ipNetToMediaInfo.ntm_mask.o_bytes,
11273 sizeof (ncec_addr));
11274 /*
11275 * map all the flags to the ACE counterpart.
11276 */
11277 ntme.ipNetToMediaInfo.ntm_flags = nce2ace(ncec);
11278
11279 ntme.ipNetToMediaPhysAddress.o_length =
11280 MIN(OCTET_LENGTH, ill->ill_phys_addr_length);
11281
11282 if (!NCE_ISREACHABLE(ncec))
11283 ntme.ipNetToMediaPhysAddress.o_length = 0;
11284 else {
11285 if (ncec->ncec_lladdr != NULL) {
11286 bcopy(ncec->ncec_lladdr,
11287 ntme.ipNetToMediaPhysAddress.o_bytes,
11288 ntme.ipNetToMediaPhysAddress.o_length);
11289 }
11290 }
11291
11292 if (!snmp_append_data2(ird->ird_netmedia.lp_head,
11293 &ird->ird_netmedia.lp_tail, (char *)&ntme, sizeof (ntme))) {
11294 ip1dbg(("ip_snmp_get2_v4_media: failed to allocate %u bytes\n",
11295 (uint_t)sizeof (ntme)));
11296 }
11297 return (0);
11298 }
11299
11300 /*
11301 * return (0) if invalid set request, 1 otherwise, including non-tcp requests
11302 */
11303 /* ARGSUSED */
11304 int
11305 ip_snmp_set(queue_t *q, int level, int name, uchar_t *ptr, int len)
11306 {
11307 switch (level) {
11308 case MIB2_IP:
11309 case MIB2_ICMP:
11310 switch (name) {
11311 default:
11312 break;
11313 }
11314 return (1);
11315 default:
11316 return (1);
11317 }
11318 }
11319
11320 /*
11321 * When there exists both a 64- and 32-bit counter of a particular type
11322 * (i.e., InReceives), only the 64-bit counters are added.
11323 */
11324 void
11325 ip_mib2_add_ip_stats(mib2_ipIfStatsEntry_t *o1, mib2_ipIfStatsEntry_t *o2)
11326 {
11327 UPDATE_MIB(o1, ipIfStatsInHdrErrors, o2->ipIfStatsInHdrErrors);
11328 UPDATE_MIB(o1, ipIfStatsInTooBigErrors, o2->ipIfStatsInTooBigErrors);
11329 UPDATE_MIB(o1, ipIfStatsInNoRoutes, o2->ipIfStatsInNoRoutes);
11330 UPDATE_MIB(o1, ipIfStatsInAddrErrors, o2->ipIfStatsInAddrErrors);
11331 UPDATE_MIB(o1, ipIfStatsInUnknownProtos, o2->ipIfStatsInUnknownProtos);
11332 UPDATE_MIB(o1, ipIfStatsInTruncatedPkts, o2->ipIfStatsInTruncatedPkts);
11333 UPDATE_MIB(o1, ipIfStatsInDiscards, o2->ipIfStatsInDiscards);
11334 UPDATE_MIB(o1, ipIfStatsOutDiscards, o2->ipIfStatsOutDiscards);
11335 UPDATE_MIB(o1, ipIfStatsOutFragOKs, o2->ipIfStatsOutFragOKs);
11336 UPDATE_MIB(o1, ipIfStatsOutFragFails, o2->ipIfStatsOutFragFails);
11337 UPDATE_MIB(o1, ipIfStatsOutFragCreates, o2->ipIfStatsOutFragCreates);
11338 UPDATE_MIB(o1, ipIfStatsReasmReqds, o2->ipIfStatsReasmReqds);
11339 UPDATE_MIB(o1, ipIfStatsReasmOKs, o2->ipIfStatsReasmOKs);
11340 UPDATE_MIB(o1, ipIfStatsReasmFails, o2->ipIfStatsReasmFails);
11341 UPDATE_MIB(o1, ipIfStatsOutNoRoutes, o2->ipIfStatsOutNoRoutes);
11342 UPDATE_MIB(o1, ipIfStatsReasmDuplicates, o2->ipIfStatsReasmDuplicates);
11343 UPDATE_MIB(o1, ipIfStatsReasmPartDups, o2->ipIfStatsReasmPartDups);
11344 UPDATE_MIB(o1, ipIfStatsForwProhibits, o2->ipIfStatsForwProhibits);
11345 UPDATE_MIB(o1, udpInCksumErrs, o2->udpInCksumErrs);
11346 UPDATE_MIB(o1, udpInOverflows, o2->udpInOverflows);
11347 UPDATE_MIB(o1, rawipInOverflows, o2->rawipInOverflows);
11348 UPDATE_MIB(o1, ipIfStatsInWrongIPVersion,
11349 o2->ipIfStatsInWrongIPVersion);
11350 UPDATE_MIB(o1, ipIfStatsOutWrongIPVersion,
11351 o2->ipIfStatsInWrongIPVersion);
11352 UPDATE_MIB(o1, ipIfStatsOutSwitchIPVersion,
11353 o2->ipIfStatsOutSwitchIPVersion);
11354 UPDATE_MIB(o1, ipIfStatsHCInReceives, o2->ipIfStatsHCInReceives);
11355 UPDATE_MIB(o1, ipIfStatsHCInOctets, o2->ipIfStatsHCInOctets);
11356 UPDATE_MIB(o1, ipIfStatsHCInForwDatagrams,
11357 o2->ipIfStatsHCInForwDatagrams);
11358 UPDATE_MIB(o1, ipIfStatsHCInDelivers, o2->ipIfStatsHCInDelivers);
11359 UPDATE_MIB(o1, ipIfStatsHCOutRequests, o2->ipIfStatsHCOutRequests);
11360 UPDATE_MIB(o1, ipIfStatsHCOutForwDatagrams,
11361 o2->ipIfStatsHCOutForwDatagrams);
11362 UPDATE_MIB(o1, ipIfStatsOutFragReqds, o2->ipIfStatsOutFragReqds);
11363 UPDATE_MIB(o1, ipIfStatsHCOutTransmits, o2->ipIfStatsHCOutTransmits);
11364 UPDATE_MIB(o1, ipIfStatsHCOutOctets, o2->ipIfStatsHCOutOctets);
11365 UPDATE_MIB(o1, ipIfStatsHCInMcastPkts, o2->ipIfStatsHCInMcastPkts);
11366 UPDATE_MIB(o1, ipIfStatsHCInMcastOctets, o2->ipIfStatsHCInMcastOctets);
11367 UPDATE_MIB(o1, ipIfStatsHCOutMcastPkts, o2->ipIfStatsHCOutMcastPkts);
11368 UPDATE_MIB(o1, ipIfStatsHCOutMcastOctets,
11369 o2->ipIfStatsHCOutMcastOctets);
11370 UPDATE_MIB(o1, ipIfStatsHCInBcastPkts, o2->ipIfStatsHCInBcastPkts);
11371 UPDATE_MIB(o1, ipIfStatsHCOutBcastPkts, o2->ipIfStatsHCOutBcastPkts);
11372 UPDATE_MIB(o1, ipsecInSucceeded, o2->ipsecInSucceeded);
11373 UPDATE_MIB(o1, ipsecInFailed, o2->ipsecInFailed);
11374 UPDATE_MIB(o1, ipInCksumErrs, o2->ipInCksumErrs);
11375 UPDATE_MIB(o1, tcpInErrs, o2->tcpInErrs);
11376 UPDATE_MIB(o1, udpNoPorts, o2->udpNoPorts);
11377 }
11378
11379 void
11380 ip_mib2_add_icmp6_stats(mib2_ipv6IfIcmpEntry_t *o1, mib2_ipv6IfIcmpEntry_t *o2)
11381 {
11382 UPDATE_MIB(o1, ipv6IfIcmpInMsgs, o2->ipv6IfIcmpInMsgs);
11383 UPDATE_MIB(o1, ipv6IfIcmpInErrors, o2->ipv6IfIcmpInErrors);
11384 UPDATE_MIB(o1, ipv6IfIcmpInDestUnreachs, o2->ipv6IfIcmpInDestUnreachs);
11385 UPDATE_MIB(o1, ipv6IfIcmpInAdminProhibs, o2->ipv6IfIcmpInAdminProhibs);
11386 UPDATE_MIB(o1, ipv6IfIcmpInTimeExcds, o2->ipv6IfIcmpInTimeExcds);
11387 UPDATE_MIB(o1, ipv6IfIcmpInParmProblems, o2->ipv6IfIcmpInParmProblems);
11388 UPDATE_MIB(o1, ipv6IfIcmpInPktTooBigs, o2->ipv6IfIcmpInPktTooBigs);
11389 UPDATE_MIB(o1, ipv6IfIcmpInEchos, o2->ipv6IfIcmpInEchos);
11390 UPDATE_MIB(o1, ipv6IfIcmpInEchoReplies, o2->ipv6IfIcmpInEchoReplies);
11391 UPDATE_MIB(o1, ipv6IfIcmpInRouterSolicits,
11392 o2->ipv6IfIcmpInRouterSolicits);
11393 UPDATE_MIB(o1, ipv6IfIcmpInRouterAdvertisements,
11394 o2->ipv6IfIcmpInRouterAdvertisements);
11395 UPDATE_MIB(o1, ipv6IfIcmpInNeighborSolicits,
11396 o2->ipv6IfIcmpInNeighborSolicits);
11397 UPDATE_MIB(o1, ipv6IfIcmpInNeighborAdvertisements,
11398 o2->ipv6IfIcmpInNeighborAdvertisements);
11399 UPDATE_MIB(o1, ipv6IfIcmpInRedirects, o2->ipv6IfIcmpInRedirects);
11400 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembQueries,
11401 o2->ipv6IfIcmpInGroupMembQueries);
11402 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembResponses,
11403 o2->ipv6IfIcmpInGroupMembResponses);
11404 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembReductions,
11405 o2->ipv6IfIcmpInGroupMembReductions);
11406 UPDATE_MIB(o1, ipv6IfIcmpOutMsgs, o2->ipv6IfIcmpOutMsgs);
11407 UPDATE_MIB(o1, ipv6IfIcmpOutErrors, o2->ipv6IfIcmpOutErrors);
11408 UPDATE_MIB(o1, ipv6IfIcmpOutDestUnreachs,
11409 o2->ipv6IfIcmpOutDestUnreachs);
11410 UPDATE_MIB(o1, ipv6IfIcmpOutAdminProhibs,
11411 o2->ipv6IfIcmpOutAdminProhibs);
11412 UPDATE_MIB(o1, ipv6IfIcmpOutTimeExcds, o2->ipv6IfIcmpOutTimeExcds);
11413 UPDATE_MIB(o1, ipv6IfIcmpOutParmProblems,
11414 o2->ipv6IfIcmpOutParmProblems);
11415 UPDATE_MIB(o1, ipv6IfIcmpOutPktTooBigs, o2->ipv6IfIcmpOutPktTooBigs);
11416 UPDATE_MIB(o1, ipv6IfIcmpOutEchos, o2->ipv6IfIcmpOutEchos);
11417 UPDATE_MIB(o1, ipv6IfIcmpOutEchoReplies, o2->ipv6IfIcmpOutEchoReplies);
11418 UPDATE_MIB(o1, ipv6IfIcmpOutRouterSolicits,
11419 o2->ipv6IfIcmpOutRouterSolicits);
11420 UPDATE_MIB(o1, ipv6IfIcmpOutRouterAdvertisements,
11421 o2->ipv6IfIcmpOutRouterAdvertisements);
11422 UPDATE_MIB(o1, ipv6IfIcmpOutNeighborSolicits,
11423 o2->ipv6IfIcmpOutNeighborSolicits);
11424 UPDATE_MIB(o1, ipv6IfIcmpOutNeighborAdvertisements,
11425 o2->ipv6IfIcmpOutNeighborAdvertisements);
11426 UPDATE_MIB(o1, ipv6IfIcmpOutRedirects, o2->ipv6IfIcmpOutRedirects);
11427 UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembQueries,
11428 o2->ipv6IfIcmpOutGroupMembQueries);
11429 UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembResponses,
11430 o2->ipv6IfIcmpOutGroupMembResponses);
11431 UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembReductions,
11432 o2->ipv6IfIcmpOutGroupMembReductions);
11433 UPDATE_MIB(o1, ipv6IfIcmpInOverflows, o2->ipv6IfIcmpInOverflows);
11434 UPDATE_MIB(o1, ipv6IfIcmpBadHoplimit, o2->ipv6IfIcmpBadHoplimit);
11435 UPDATE_MIB(o1, ipv6IfIcmpInBadNeighborAdvertisements,
11436 o2->ipv6IfIcmpInBadNeighborAdvertisements);
11437 UPDATE_MIB(o1, ipv6IfIcmpInBadNeighborSolicitations,
11438 o2->ipv6IfIcmpInBadNeighborSolicitations);
11439 UPDATE_MIB(o1, ipv6IfIcmpInBadRedirects, o2->ipv6IfIcmpInBadRedirects);
11440 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembTotal,
11441 o2->ipv6IfIcmpInGroupMembTotal);
11442 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembBadQueries,
11443 o2->ipv6IfIcmpInGroupMembBadQueries);
11444 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembBadReports,
11445 o2->ipv6IfIcmpInGroupMembBadReports);
11446 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembOurReports,
11447 o2->ipv6IfIcmpInGroupMembOurReports);
11448 }
11449
11450 /*
11451 * Called before the options are updated to check if this packet will
11452 * be source routed from here.
11453 * This routine assumes that the options are well formed i.e. that they
11454 * have already been checked.
11455 */
11456 boolean_t
11457 ip_source_routed(ipha_t *ipha, ip_stack_t *ipst)
11458 {
11459 ipoptp_t opts;
11460 uchar_t *opt;
11461 uint8_t optval;
11462 uint8_t optlen;
11463 ipaddr_t dst;
11464
11465 if (IS_SIMPLE_IPH(ipha)) {
11466 ip2dbg(("not source routed\n"));
11467 return (B_FALSE);
11468 }
11469 dst = ipha->ipha_dst;
11470 for (optval = ipoptp_first(&opts, ipha);
11471 optval != IPOPT_EOL;
11472 optval = ipoptp_next(&opts)) {
11473 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
11474 opt = opts.ipoptp_cur;
11475 optlen = opts.ipoptp_len;
11476 ip2dbg(("ip_source_routed: opt %d, len %d\n",
11477 optval, optlen));
11478 switch (optval) {
11479 uint32_t off;
11480 case IPOPT_SSRR:
11481 case IPOPT_LSRR:
11482 /*
11483 * If dst is one of our addresses and there are some
11484 * entries left in the source route return (true).
11485 */
11486 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
11487 ip2dbg(("ip_source_routed: not next"
11488 " source route 0x%x\n",
11489 ntohl(dst)));
11490 return (B_FALSE);
11491 }
11492 off = opt[IPOPT_OFFSET];
11493 off--;
11494 if (optlen < IP_ADDR_LEN ||
11495 off > optlen - IP_ADDR_LEN) {
11496 /* End of source route */
11497 ip1dbg(("ip_source_routed: end of SR\n"));
11498 return (B_FALSE);
11499 }
11500 return (B_TRUE);
11501 }
11502 }
11503 ip2dbg(("not source routed\n"));
11504 return (B_FALSE);
11505 }
11506
11507 /*
11508 * ip_unbind is called by the transports to remove a conn from
11509 * the fanout table.
11510 */
11511 void
11512 ip_unbind(conn_t *connp)
11513 {
11514
11515 ASSERT(!MUTEX_HELD(&connp->conn_lock));
11516
11517 if (is_system_labeled() && connp->conn_anon_port) {
11518 (void) tsol_mlp_anon(crgetzone(connp->conn_cred),
11519 connp->conn_mlp_type, connp->conn_proto,
11520 ntohs(connp->conn_lport), B_FALSE);
11521 connp->conn_anon_port = 0;
11522 }
11523 connp->conn_mlp_type = mlptSingle;
11524
11525 ipcl_hash_remove(connp);
11526 }
11527
11528 /*
11529 * Used for deciding the MSS size for the upper layer. Thus
11530 * we need to check the outbound policy values in the conn.
11531 */
11532 int
11533 conn_ipsec_length(conn_t *connp)
11534 {
11535 ipsec_latch_t *ipl;
11536
11537 ipl = connp->conn_latch;
11538 if (ipl == NULL)
11539 return (0);
11540
11541 if (connp->conn_ixa->ixa_ipsec_policy == NULL)
11542 return (0);
11543
11544 return (connp->conn_ixa->ixa_ipsec_policy->ipsp_act->ipa_ovhd);
11545 }
11546
11547 /*
11548 * Returns an estimate of the IPsec headers size. This is used if
11549 * we don't want to call into IPsec to get the exact size.
11550 */
11551 int
11552 ipsec_out_extra_length(ip_xmit_attr_t *ixa)
11553 {
11554 ipsec_action_t *a;
11555
11556 if (!(ixa->ixa_flags & IXAF_IPSEC_SECURE))
11557 return (0);
11558
11559 a = ixa->ixa_ipsec_action;
11560 if (a == NULL) {
11561 ASSERT(ixa->ixa_ipsec_policy != NULL);
11562 a = ixa->ixa_ipsec_policy->ipsp_act;
11563 }
11564 ASSERT(a != NULL);
11565
11566 return (a->ipa_ovhd);
11567 }
11568
11569 /*
11570 * If there are any source route options, return the true final
11571 * destination. Otherwise, return the destination.
11572 */
11573 ipaddr_t
11574 ip_get_dst(ipha_t *ipha)
11575 {
11576 ipoptp_t opts;
11577 uchar_t *opt;
11578 uint8_t optval;
11579 uint8_t optlen;
11580 ipaddr_t dst;
11581 uint32_t off;
11582
11583 dst = ipha->ipha_dst;
11584
11585 if (IS_SIMPLE_IPH(ipha))
11586 return (dst);
11587
11588 for (optval = ipoptp_first(&opts, ipha);
11589 optval != IPOPT_EOL;
11590 optval = ipoptp_next(&opts)) {
11591 opt = opts.ipoptp_cur;
11592 optlen = opts.ipoptp_len;
11593 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
11594 switch (optval) {
11595 case IPOPT_SSRR:
11596 case IPOPT_LSRR:
11597 off = opt[IPOPT_OFFSET];
11598 /*
11599 * If one of the conditions is true, it means
11600 * end of options and dst already has the right
11601 * value.
11602 */
11603 if (!(optlen < IP_ADDR_LEN || off > optlen - 3)) {
11604 off = optlen - IP_ADDR_LEN;
11605 bcopy(&opt[off], &dst, IP_ADDR_LEN);
11606 }
11607 return (dst);
11608 default:
11609 break;
11610 }
11611 }
11612
11613 return (dst);
11614 }
11615
11616 /*
11617 * Outbound IP fragmentation routine.
11618 * Assumes the caller has checked whether or not fragmentation should
11619 * be allowed. Here we copy the DF bit from the header to all the generated
11620 * fragments.
11621 */
11622 int
11623 ip_fragment_v4(mblk_t *mp_orig, nce_t *nce, iaflags_t ixaflags,
11624 uint_t pkt_len, uint32_t max_frag, uint32_t xmit_hint, zoneid_t szone,
11625 zoneid_t nolzid, pfirepostfrag_t postfragfn, uintptr_t *ixa_cookie)
11626 {
11627 int i1;
11628 int hdr_len;
11629 mblk_t *hdr_mp;
11630 ipha_t *ipha;
11631 int ip_data_end;
11632 int len;
11633 mblk_t *mp = mp_orig;
11634 int offset;
11635 ill_t *ill = nce->nce_ill;
11636 ip_stack_t *ipst = ill->ill_ipst;
11637 mblk_t *carve_mp;
11638 uint32_t frag_flag;
11639 uint_t priority = mp->b_band;
11640 int error = 0;
11641
11642 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragReqds);
11643
11644 if (pkt_len != msgdsize(mp)) {
11645 ip0dbg(("Packet length mismatch: %d, %ld\n",
11646 pkt_len, msgdsize(mp)));
11647 freemsg(mp);
11648 return (EINVAL);
11649 }
11650
11651 if (max_frag == 0) {
11652 ip1dbg(("ip_fragment_v4: max_frag is zero. Dropping packet\n"));
11653 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11654 ip_drop_output("FragFails: zero max_frag", mp, ill);
11655 freemsg(mp);
11656 return (EINVAL);
11657 }
11658
11659 ASSERT(MBLKL(mp) >= sizeof (ipha_t));
11660 ipha = (ipha_t *)mp->b_rptr;
11661 ASSERT(ntohs(ipha->ipha_length) == pkt_len);
11662 frag_flag = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_DF;
11663
11664 /*
11665 * Establish the starting offset. May not be zero if we are fragging
11666 * a fragment that is being forwarded.
11667 */
11668 offset = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_OFFSET;
11669
11670 /* TODO why is this test needed? */
11671 if (((max_frag - ntohs(ipha->ipha_length)) & ~7) < 8) {
11672 /* TODO: notify ulp somehow */
11673 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11674 ip_drop_output("FragFails: bad starting offset", mp, ill);
11675 freemsg(mp);
11676 return (EINVAL);
11677 }
11678
11679 hdr_len = IPH_HDR_LENGTH(ipha);
11680 ipha->ipha_hdr_checksum = 0;
11681
11682 /*
11683 * Establish the number of bytes maximum per frag, after putting
11684 * in the header.
11685 */
11686 len = (max_frag - hdr_len) & ~7;
11687
11688 /* Get a copy of the header for the trailing frags */
11689 hdr_mp = ip_fragment_copyhdr((uchar_t *)ipha, hdr_len, offset, ipst,
11690 mp);
11691 if (hdr_mp == NULL) {
11692 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11693 ip_drop_output("FragFails: no hdr_mp", mp, ill);
11694 freemsg(mp);
11695 return (ENOBUFS);
11696 }
11697
11698 /* Store the starting offset, with the MoreFrags flag. */
11699 i1 = offset | IPH_MF | frag_flag;
11700 ipha->ipha_fragment_offset_and_flags = htons((uint16_t)i1);
11701
11702 /* Establish the ending byte offset, based on the starting offset. */
11703 offset <<= 3;
11704 ip_data_end = offset + ntohs(ipha->ipha_length) - hdr_len;
11705
11706 /* Store the length of the first fragment in the IP header. */
11707 i1 = len + hdr_len;
11708 ASSERT(i1 <= IP_MAXPACKET);
11709 ipha->ipha_length = htons((uint16_t)i1);
11710
11711 /*
11712 * Compute the IP header checksum for the first frag. We have to
11713 * watch out that we stop at the end of the header.
11714 */
11715 ipha->ipha_hdr_checksum = ip_csum_hdr(ipha);
11716
11717 /*
11718 * Now carve off the first frag. Note that this will include the
11719 * original IP header.
11720 */
11721 if (!(mp = ip_carve_mp(&mp_orig, i1))) {
11722 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11723 ip_drop_output("FragFails: could not carve mp", mp_orig, ill);
11724 freeb(hdr_mp);
11725 freemsg(mp_orig);
11726 return (ENOBUFS);
11727 }
11728
11729 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragCreates);
11730
11731 error = postfragfn(mp, nce, ixaflags, i1, xmit_hint, szone, nolzid,
11732 ixa_cookie);
11733 if (error != 0 && error != EWOULDBLOCK) {
11734 /* No point in sending the other fragments */
11735 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11736 ip_drop_output("FragFails: postfragfn failed", mp_orig, ill);
11737 freeb(hdr_mp);
11738 freemsg(mp_orig);
11739 return (error);
11740 }
11741
11742 /* No need to redo state machine in loop */
11743 ixaflags &= ~IXAF_REACH_CONF;
11744
11745 /* Advance the offset to the second frag starting point. */
11746 offset += len;
11747 /*
11748 * Update hdr_len from the copied header - there might be less options
11749 * in the later fragments.
11750 */
11751 hdr_len = IPH_HDR_LENGTH(hdr_mp->b_rptr);
11752 /* Loop until done. */
11753 for (;;) {
11754 uint16_t offset_and_flags;
11755 uint16_t ip_len;
11756
11757 if (ip_data_end - offset > len) {
11758 /*
11759 * Carve off the appropriate amount from the original
11760 * datagram.
11761 */
11762 if (!(carve_mp = ip_carve_mp(&mp_orig, len))) {
11763 mp = NULL;
11764 break;
11765 }
11766 /*
11767 * More frags after this one. Get another copy
11768 * of the header.
11769 */
11770 if (carve_mp->b_datap->db_ref == 1 &&
11771 hdr_mp->b_wptr - hdr_mp->b_rptr <
11772 carve_mp->b_rptr - carve_mp->b_datap->db_base) {
11773 /* Inline IP header */
11774 carve_mp->b_rptr -= hdr_mp->b_wptr -
11775 hdr_mp->b_rptr;
11776 bcopy(hdr_mp->b_rptr, carve_mp->b_rptr,
11777 hdr_mp->b_wptr - hdr_mp->b_rptr);
11778 mp = carve_mp;
11779 } else {
11780 if (!(mp = copyb(hdr_mp))) {
11781 freemsg(carve_mp);
11782 break;
11783 }
11784 /* Get priority marking, if any. */
11785 mp->b_band = priority;
11786 mp->b_cont = carve_mp;
11787 }
11788 ipha = (ipha_t *)mp->b_rptr;
11789 offset_and_flags = IPH_MF;
11790 } else {
11791 /*
11792 * Last frag. Consume the header. Set len to
11793 * the length of this last piece.
11794 */
11795 len = ip_data_end - offset;
11796
11797 /*
11798 * Carve off the appropriate amount from the original
11799 * datagram.
11800 */
11801 if (!(carve_mp = ip_carve_mp(&mp_orig, len))) {
11802 mp = NULL;
11803 break;
11804 }
11805 if (carve_mp->b_datap->db_ref == 1 &&
11806 hdr_mp->b_wptr - hdr_mp->b_rptr <
11807 carve_mp->b_rptr - carve_mp->b_datap->db_base) {
11808 /* Inline IP header */
11809 carve_mp->b_rptr -= hdr_mp->b_wptr -
11810 hdr_mp->b_rptr;
11811 bcopy(hdr_mp->b_rptr, carve_mp->b_rptr,
11812 hdr_mp->b_wptr - hdr_mp->b_rptr);
11813 mp = carve_mp;
11814 freeb(hdr_mp);
11815 hdr_mp = mp;
11816 } else {
11817 mp = hdr_mp;
11818 /* Get priority marking, if any. */
11819 mp->b_band = priority;
11820 mp->b_cont = carve_mp;
11821 }
11822 ipha = (ipha_t *)mp->b_rptr;
11823 /* A frag of a frag might have IPH_MF non-zero */
11824 offset_and_flags =
11825 ntohs(ipha->ipha_fragment_offset_and_flags) &
11826 IPH_MF;
11827 }
11828 offset_and_flags |= (uint16_t)(offset >> 3);
11829 offset_and_flags |= (uint16_t)frag_flag;
11830 /* Store the offset and flags in the IP header. */
11831 ipha->ipha_fragment_offset_and_flags = htons(offset_and_flags);
11832
11833 /* Store the length in the IP header. */
11834 ip_len = (uint16_t)(len + hdr_len);
11835 ipha->ipha_length = htons(ip_len);
11836
11837 /*
11838 * Set the IP header checksum. Note that mp is just
11839 * the header, so this is easy to pass to ip_csum.
11840 */
11841 ipha->ipha_hdr_checksum = ip_csum_hdr(ipha);
11842
11843 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragCreates);
11844
11845 error = postfragfn(mp, nce, ixaflags, ip_len, xmit_hint, szone,
11846 nolzid, ixa_cookie);
11847 /* All done if we just consumed the hdr_mp. */
11848 if (mp == hdr_mp) {
11849 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragOKs);
11850 return (error);
11851 }
11852 if (error != 0 && error != EWOULDBLOCK) {
11853 DTRACE_PROBE2(ip__xmit__frag__fail, ill_t *, ill,
11854 mblk_t *, hdr_mp);
11855 /* No point in sending the other fragments */
11856 break;
11857 }
11858
11859 /* Otherwise, advance and loop. */
11860 offset += len;
11861 }
11862 /* Clean up following allocation failure. */
11863 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11864 ip_drop_output("FragFails: loop ended", NULL, ill);
11865 if (mp != hdr_mp)
11866 freeb(hdr_mp);
11867 if (mp != mp_orig)
11868 freemsg(mp_orig);
11869 return (error);
11870 }
11871
11872 /*
11873 * Copy the header plus those options which have the copy bit set
11874 */
11875 static mblk_t *
11876 ip_fragment_copyhdr(uchar_t *rptr, int hdr_len, int offset, ip_stack_t *ipst,
11877 mblk_t *src)
11878 {
11879 mblk_t *mp;
11880 uchar_t *up;
11881
11882 /*
11883 * Quick check if we need to look for options without the copy bit
11884 * set
11885 */
11886 mp = allocb_tmpl(ipst->ips_ip_wroff_extra + hdr_len, src);
11887 if (!mp)
11888 return (mp);
11889 mp->b_rptr += ipst->ips_ip_wroff_extra;
11890 if (hdr_len == IP_SIMPLE_HDR_LENGTH || offset != 0) {
11891 bcopy(rptr, mp->b_rptr, hdr_len);
11892 mp->b_wptr += hdr_len + ipst->ips_ip_wroff_extra;
11893 return (mp);
11894 }
11895 up = mp->b_rptr;
11896 bcopy(rptr, up, IP_SIMPLE_HDR_LENGTH);
11897 up += IP_SIMPLE_HDR_LENGTH;
11898 rptr += IP_SIMPLE_HDR_LENGTH;
11899 hdr_len -= IP_SIMPLE_HDR_LENGTH;
11900 while (hdr_len > 0) {
11901 uint32_t optval;
11902 uint32_t optlen;
11903
11904 optval = *rptr;
11905 if (optval == IPOPT_EOL)
11906 break;
11907 if (optval == IPOPT_NOP)
11908 optlen = 1;
11909 else
11910 optlen = rptr[1];
11911 if (optval & IPOPT_COPY) {
11912 bcopy(rptr, up, optlen);
11913 up += optlen;
11914 }
11915 rptr += optlen;
11916 hdr_len -= optlen;
11917 }
11918 /*
11919 * Make sure that we drop an even number of words by filling
11920 * with EOL to the next word boundary.
11921 */
11922 for (hdr_len = up - (mp->b_rptr + IP_SIMPLE_HDR_LENGTH);
11923 hdr_len & 0x3; hdr_len++)
11924 *up++ = IPOPT_EOL;
11925 mp->b_wptr = up;
11926 /* Update header length */
11927 mp->b_rptr[0] = (uint8_t)((IP_VERSION << 4) | ((up - mp->b_rptr) >> 2));
11928 return (mp);
11929 }
11930
11931 /*
11932 * Update any source route, record route, or timestamp options when
11933 * sending a packet back to ourselves.
11934 * Check that we are at end of strict source route.
11935 * The options have been sanity checked by ip_output_options().
11936 */
11937 void
11938 ip_output_local_options(ipha_t *ipha, ip_stack_t *ipst)
11939 {
11940 ipoptp_t opts;
11941 uchar_t *opt;
11942 uint8_t optval;
11943 uint8_t optlen;
11944 ipaddr_t dst;
11945 uint32_t ts;
11946 timestruc_t now;
11947
11948 for (optval = ipoptp_first(&opts, ipha);
11949 optval != IPOPT_EOL;
11950 optval = ipoptp_next(&opts)) {
11951 opt = opts.ipoptp_cur;
11952 optlen = opts.ipoptp_len;
11953 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
11954 switch (optval) {
11955 uint32_t off;
11956 case IPOPT_SSRR:
11957 case IPOPT_LSRR:
11958 off = opt[IPOPT_OFFSET];
11959 off--;
11960 if (optlen < IP_ADDR_LEN ||
11961 off > optlen - IP_ADDR_LEN) {
11962 /* End of source route */
11963 break;
11964 }
11965 /*
11966 * This will only happen if two consecutive entries
11967 * in the source route contains our address or if
11968 * it is a packet with a loose source route which
11969 * reaches us before consuming the whole source route
11970 */
11971
11972 if (optval == IPOPT_SSRR) {
11973 return;
11974 }
11975 /*
11976 * Hack: instead of dropping the packet truncate the
11977 * source route to what has been used by filling the
11978 * rest with IPOPT_NOP.
11979 */
11980 opt[IPOPT_OLEN] = (uint8_t)off;
11981 while (off < optlen) {
11982 opt[off++] = IPOPT_NOP;
11983 }
11984 break;
11985 case IPOPT_RR:
11986 off = opt[IPOPT_OFFSET];
11987 off--;
11988 if (optlen < IP_ADDR_LEN ||
11989 off > optlen - IP_ADDR_LEN) {
11990 /* No more room - ignore */
11991 ip1dbg((
11992 "ip_output_local_options: end of RR\n"));
11993 break;
11994 }
11995 dst = htonl(INADDR_LOOPBACK);
11996 bcopy(&dst, (char *)opt + off, IP_ADDR_LEN);
11997 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
11998 break;
11999 case IPOPT_TS:
12000 /* Insert timestamp if there is romm */
12001 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
12002 case IPOPT_TS_TSONLY:
12003 off = IPOPT_TS_TIMELEN;
12004 break;
12005 case IPOPT_TS_PRESPEC:
12006 case IPOPT_TS_PRESPEC_RFC791:
12007 /* Verify that the address matched */
12008 off = opt[IPOPT_OFFSET] - 1;
12009 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
12010 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
12011 /* Not for us */
12012 break;
12013 }
12014 /* FALLTHRU */
12015 case IPOPT_TS_TSANDADDR:
12016 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
12017 break;
12018 default:
12019 /*
12020 * ip_*put_options should have already
12021 * dropped this packet.
12022 */
12023 cmn_err(CE_PANIC, "ip_output_local_options: "
12024 "unknown IT - bug in ip_output_options?\n");
12025 return; /* Keep "lint" happy */
12026 }
12027 if (opt[IPOPT_OFFSET] - 1 + off > optlen) {
12028 /* Increase overflow counter */
12029 off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1;
12030 opt[IPOPT_POS_OV_FLG] = (uint8_t)
12031 (opt[IPOPT_POS_OV_FLG] & 0x0F) |
12032 (off << 4);
12033 break;
12034 }
12035 off = opt[IPOPT_OFFSET] - 1;
12036 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
12037 case IPOPT_TS_PRESPEC:
12038 case IPOPT_TS_PRESPEC_RFC791:
12039 case IPOPT_TS_TSANDADDR:
12040 dst = htonl(INADDR_LOOPBACK);
12041 bcopy(&dst, (char *)opt + off, IP_ADDR_LEN);
12042 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
12043 /* FALLTHRU */
12044 case IPOPT_TS_TSONLY:
12045 off = opt[IPOPT_OFFSET] - 1;
12046 /* Compute # of milliseconds since midnight */
12047 gethrestime(&now);
12048 ts = (now.tv_sec % (24 * 60 * 60)) * 1000 +
12049 NSEC2MSEC(now.tv_nsec);
12050 bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN);
12051 opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN;
12052 break;
12053 }
12054 break;
12055 }
12056 }
12057 }
12058
12059 /*
12060 * Prepend an M_DATA fastpath header, and if none present prepend a
12061 * DL_UNITDATA_REQ. Frees the mblk on failure.
12062 *
12063 * nce_dlur_mp and nce_fp_mp can not disappear once they have been set.
12064 * If there is a change to them, the nce will be deleted (condemned) and
12065 * a new nce_t will be created when packets are sent. Thus we need no locks
12066 * to access those fields.
12067 *
12068 * We preserve b_band to support IPQoS. If a DL_UNITDATA_REQ is prepended
12069 * we place b_band in dl_priority.dl_max.
12070 */
12071 static mblk_t *
12072 ip_xmit_attach_llhdr(mblk_t *mp, nce_t *nce)
12073 {
12074 uint_t hlen;
12075 mblk_t *mp1;
12076 uint_t priority;
12077 uchar_t *rptr;
12078
12079 rptr = mp->b_rptr;
12080
12081 ASSERT(DB_TYPE(mp) == M_DATA);
12082 priority = mp->b_band;
12083
12084 ASSERT(nce != NULL);
12085 if ((mp1 = nce->nce_fp_mp) != NULL) {
12086 hlen = MBLKL(mp1);
12087 /*
12088 * Check if we have enough room to prepend fastpath
12089 * header
12090 */
12091 if (hlen != 0 && (rptr - mp->b_datap->db_base) >= hlen) {
12092 rptr -= hlen;
12093 bcopy(mp1->b_rptr, rptr, hlen);
12094 /*
12095 * Set the b_rptr to the start of the link layer
12096 * header
12097 */
12098 mp->b_rptr = rptr;
12099 return (mp);
12100 }
12101 mp1 = copyb(mp1);
12102 if (mp1 == NULL) {
12103 ill_t *ill = nce->nce_ill;
12104
12105 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
12106 ip_drop_output("ipIfStatsOutDiscards", mp, ill);
12107 freemsg(mp);
12108 return (NULL);
12109 }
12110 mp1->b_band = priority;
12111 mp1->b_cont = mp;
12112 DB_CKSUMSTART(mp1) = DB_CKSUMSTART(mp);
12113 DB_CKSUMSTUFF(mp1) = DB_CKSUMSTUFF(mp);
12114 DB_CKSUMEND(mp1) = DB_CKSUMEND(mp);
12115 DB_CKSUMFLAGS(mp1) = DB_CKSUMFLAGS(mp);
12116 DB_LSOMSS(mp1) = DB_LSOMSS(mp);
12117 DTRACE_PROBE1(ip__xmit__copyb, (mblk_t *), mp1);
12118 /*
12119 * XXX disable ICK_VALID and compute checksum
12120 * here; can happen if nce_fp_mp changes and
12121 * it can't be copied now due to insufficient
12122 * space. (unlikely, fp mp can change, but it
12123 * does not increase in length)
12124 */
12125 return (mp1);
12126 }
12127 mp1 = copyb(nce->nce_dlur_mp);
12128
12129 if (mp1 == NULL) {
12130 ill_t *ill = nce->nce_ill;
12131
12132 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
12133 ip_drop_output("ipIfStatsOutDiscards", mp, ill);
12134 freemsg(mp);
12135 return (NULL);
12136 }
12137 mp1->b_cont = mp;
12138 if (priority != 0) {
12139 mp1->b_band = priority;
12140 ((dl_unitdata_req_t *)(mp1->b_rptr))->dl_priority.dl_max =
12141 priority;
12142 }
12143 return (mp1);
12144 }
12145
12146 /*
12147 * Finish the outbound IPsec processing. This function is called from
12148 * ipsec_out_process() if the IPsec packet was processed
12149 * synchronously, or from {ah,esp}_kcf_callback_outbound() if it was processed
12150 * asynchronously.
12151 *
12152 * This is common to IPv4 and IPv6.
12153 */
12154 int
12155 ip_output_post_ipsec(mblk_t *mp, ip_xmit_attr_t *ixa)
12156 {
12157 iaflags_t ixaflags = ixa->ixa_flags;
12158 uint_t pktlen;
12159
12160
12161 /* AH/ESP don't update ixa_pktlen when they modify the packet */
12162 if (ixaflags & IXAF_IS_IPV4) {
12163 ipha_t *ipha = (ipha_t *)mp->b_rptr;
12164
12165 ASSERT(IPH_HDR_VERSION(ipha) == IPV4_VERSION);
12166 pktlen = ntohs(ipha->ipha_length);
12167 } else {
12168 ip6_t *ip6h = (ip6_t *)mp->b_rptr;
12169
12170 ASSERT(IPH_HDR_VERSION(mp->b_rptr) == IPV6_VERSION);
12171 pktlen = ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN;
12172 }
12173
12174 /*
12175 * We release any hard reference on the SAs here to make
12176 * sure the SAs can be garbage collected. ipsr_sa has a soft reference
12177 * on the SAs.
12178 * If in the future we want the hard latching of the SAs in the
12179 * ip_xmit_attr_t then we should remove this.
12180 */
12181 if (ixa->ixa_ipsec_esp_sa != NULL) {
12182 IPSA_REFRELE(ixa->ixa_ipsec_esp_sa);
12183 ixa->ixa_ipsec_esp_sa = NULL;
12184 }
12185 if (ixa->ixa_ipsec_ah_sa != NULL) {
12186 IPSA_REFRELE(ixa->ixa_ipsec_ah_sa);
12187 ixa->ixa_ipsec_ah_sa = NULL;
12188 }
12189
12190 /* Do we need to fragment? */
12191 if ((ixa->ixa_flags & IXAF_IPV6_ADD_FRAGHDR) ||
12192 pktlen > ixa->ixa_fragsize) {
12193 if (ixaflags & IXAF_IS_IPV4) {
12194 ASSERT(!(ixa->ixa_flags & IXAF_IPV6_ADD_FRAGHDR));
12195 /*
12196 * We check for the DF case in ipsec_out_process
12197 * hence this only handles the non-DF case.
12198 */
12199 return (ip_fragment_v4(mp, ixa->ixa_nce, ixa->ixa_flags,
12200 pktlen, ixa->ixa_fragsize,
12201 ixa->ixa_xmit_hint, ixa->ixa_zoneid,
12202 ixa->ixa_no_loop_zoneid, ixa->ixa_postfragfn,
12203 &ixa->ixa_cookie));
12204 } else {
12205 mp = ip_fraghdr_add_v6(mp, ixa->ixa_ident, ixa);
12206 if (mp == NULL) {
12207 /* MIB and ip_drop_output already done */
12208 return (ENOMEM);
12209 }
12210 pktlen += sizeof (ip6_frag_t);
12211 if (pktlen > ixa->ixa_fragsize) {
12212 return (ip_fragment_v6(mp, ixa->ixa_nce,
12213 ixa->ixa_flags, pktlen,
12214 ixa->ixa_fragsize, ixa->ixa_xmit_hint,
12215 ixa->ixa_zoneid, ixa->ixa_no_loop_zoneid,
12216 ixa->ixa_postfragfn, &ixa->ixa_cookie));
12217 }
12218 }
12219 }
12220 return ((ixa->ixa_postfragfn)(mp, ixa->ixa_nce, ixa->ixa_flags,
12221 pktlen, ixa->ixa_xmit_hint, ixa->ixa_zoneid,
12222 ixa->ixa_no_loop_zoneid, NULL));
12223 }
12224
12225 /*
12226 * Finish the inbound IPsec processing. This function is called from
12227 * ipsec_out_process() if the IPsec packet was processed
12228 * synchronously, or from {ah,esp}_kcf_callback_outbound() if it was processed
12229 * asynchronously.
12230 *
12231 * This is common to IPv4 and IPv6.
12232 */
12233 void
12234 ip_input_post_ipsec(mblk_t *mp, ip_recv_attr_t *ira)
12235 {
12236 iaflags_t iraflags = ira->ira_flags;
12237
12238 /* Length might have changed */
12239 if (iraflags & IRAF_IS_IPV4) {
12240 ipha_t *ipha = (ipha_t *)mp->b_rptr;
12241
12242 ASSERT(IPH_HDR_VERSION(ipha) == IPV4_VERSION);
12243 ira->ira_pktlen = ntohs(ipha->ipha_length);
12244 ira->ira_ip_hdr_length = IPH_HDR_LENGTH(ipha);
12245 ira->ira_protocol = ipha->ipha_protocol;
12246
12247 ip_fanout_v4(mp, ipha, ira);
12248 } else {
12249 ip6_t *ip6h = (ip6_t *)mp->b_rptr;
12250 uint8_t *nexthdrp;
12251
12252 ASSERT(IPH_HDR_VERSION(mp->b_rptr) == IPV6_VERSION);
12253 ira->ira_pktlen = ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN;
12254 if (!ip_hdr_length_nexthdr_v6(mp, ip6h, &ira->ira_ip_hdr_length,
12255 &nexthdrp)) {
12256 /* Malformed packet */
12257 BUMP_MIB(ira->ira_ill->ill_ip_mib, ipIfStatsInDiscards);
12258 ip_drop_input("ipIfStatsInDiscards", mp, ira->ira_ill);
12259 freemsg(mp);
12260 return;
12261 }
12262 ira->ira_protocol = *nexthdrp;
12263 ip_fanout_v6(mp, ip6h, ira);
12264 }
12265 }
12266
12267 /*
12268 * Select which AH & ESP SA's to use (if any) for the outbound packet.
12269 *
12270 * If this function returns B_TRUE, the requested SA's have been filled
12271 * into the ixa_ipsec_*_sa pointers.
12272 *
12273 * If the function returns B_FALSE, the packet has been "consumed", most
12274 * likely by an ACQUIRE sent up via PF_KEY to a key management daemon.
12275 *
12276 * The SA references created by the protocol-specific "select"
12277 * function will be released in ip_output_post_ipsec.
12278 */
12279 static boolean_t
12280 ipsec_out_select_sa(mblk_t *mp, ip_xmit_attr_t *ixa)
12281 {
12282 boolean_t need_ah_acquire = B_FALSE, need_esp_acquire = B_FALSE;
12283 ipsec_policy_t *pp;
12284 ipsec_action_t *ap;
12285
12286 ASSERT(ixa->ixa_flags & IXAF_IPSEC_SECURE);
12287 ASSERT((ixa->ixa_ipsec_policy != NULL) ||
12288 (ixa->ixa_ipsec_action != NULL));
12289
12290 ap = ixa->ixa_ipsec_action;
12291 if (ap == NULL) {
12292 pp = ixa->ixa_ipsec_policy;
12293 ASSERT(pp != NULL);
12294 ap = pp->ipsp_act;
12295 ASSERT(ap != NULL);
12296 }
12297
12298 /*
12299 * We have an action. now, let's select SA's.
12300 * A side effect of setting ixa_ipsec_*_sa is that it will
12301 * be cached in the conn_t.
12302 */
12303 if (ap->ipa_want_esp) {
12304 if (ixa->ixa_ipsec_esp_sa == NULL) {
12305 need_esp_acquire = !ipsec_outbound_sa(mp, ixa,
12306 IPPROTO_ESP);
12307 }
12308 ASSERT(need_esp_acquire || ixa->ixa_ipsec_esp_sa != NULL);
12309 }
12310
12311 if (ap->ipa_want_ah) {
12312 if (ixa->ixa_ipsec_ah_sa == NULL) {
12313 need_ah_acquire = !ipsec_outbound_sa(mp, ixa,
12314 IPPROTO_AH);
12315 }
12316 ASSERT(need_ah_acquire || ixa->ixa_ipsec_ah_sa != NULL);
12317 /*
12318 * The ESP and AH processing order needs to be preserved
12319 * when both protocols are required (ESP should be applied
12320 * before AH for an outbound packet). Force an ESP ACQUIRE
12321 * when both ESP and AH are required, and an AH ACQUIRE
12322 * is needed.
12323 */
12324 if (ap->ipa_want_esp && need_ah_acquire)
12325 need_esp_acquire = B_TRUE;
12326 }
12327
12328 /*
12329 * Send an ACQUIRE (extended, regular, or both) if we need one.
12330 * Release SAs that got referenced, but will not be used until we
12331 * acquire _all_ of the SAs we need.
12332 */
12333 if (need_ah_acquire || need_esp_acquire) {
12334 if (ixa->ixa_ipsec_ah_sa != NULL) {
12335 IPSA_REFRELE(ixa->ixa_ipsec_ah_sa);
12336 ixa->ixa_ipsec_ah_sa = NULL;
12337 }
12338 if (ixa->ixa_ipsec_esp_sa != NULL) {
12339 IPSA_REFRELE(ixa->ixa_ipsec_esp_sa);
12340 ixa->ixa_ipsec_esp_sa = NULL;
12341 }
12342
12343 sadb_acquire(mp, ixa, need_ah_acquire, need_esp_acquire);
12344 return (B_FALSE);
12345 }
12346
12347 return (B_TRUE);
12348 }
12349
12350 /*
12351 * Handle IPsec output processing.
12352 * This function is only entered once for a given packet.
12353 * We try to do things synchronously, but if we need to have user-level
12354 * set up SAs, or ESP or AH uses asynchronous kEF, then the operation
12355 * will be completed
12356 * - when the SAs are added in esp_add_sa_finish/ah_add_sa_finish
12357 * - when asynchronous ESP is done it will do AH
12358 *
12359 * In all cases we come back in ip_output_post_ipsec() to fragment and
12360 * send out the packet.
12361 */
12362 int
12363 ipsec_out_process(mblk_t *mp, ip_xmit_attr_t *ixa)
12364 {
12365 ill_t *ill = ixa->ixa_nce->nce_ill;
12366 ip_stack_t *ipst = ixa->ixa_ipst;
12367 ipsec_stack_t *ipss;
12368 ipsec_policy_t *pp;
12369 ipsec_action_t *ap;
12370
12371 ASSERT(ixa->ixa_flags & IXAF_IPSEC_SECURE);
12372
12373 ASSERT((ixa->ixa_ipsec_policy != NULL) ||
12374 (ixa->ixa_ipsec_action != NULL));
12375
12376 ipss = ipst->ips_netstack->netstack_ipsec;
12377 if (!ipsec_loaded(ipss)) {
12378 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
12379 ip_drop_packet(mp, B_TRUE, ill,
12380 DROPPER(ipss, ipds_ip_ipsec_not_loaded),
12381 &ipss->ipsec_dropper);
12382 return (ENOTSUP);
12383 }
12384
12385 ap = ixa->ixa_ipsec_action;
12386 if (ap == NULL) {
12387 pp = ixa->ixa_ipsec_policy;
12388 ASSERT(pp != NULL);
12389 ap = pp->ipsp_act;
12390 ASSERT(ap != NULL);
12391 }
12392
12393 /* Handle explicit drop action and bypass. */
12394 switch (ap->ipa_act.ipa_type) {
12395 case IPSEC_ACT_DISCARD:
12396 case IPSEC_ACT_REJECT:
12397 ip_drop_packet(mp, B_FALSE, ill,
12398 DROPPER(ipss, ipds_spd_explicit), &ipss->ipsec_spd_dropper);
12399 return (EHOSTUNREACH); /* IPsec policy failure */
12400 case IPSEC_ACT_BYPASS:
12401 return (ip_output_post_ipsec(mp, ixa));
12402 }
12403
12404 /*
12405 * The order of processing is first insert a IP header if needed.
12406 * Then insert the ESP header and then the AH header.
12407 */
12408 if ((ixa->ixa_flags & IXAF_IS_IPV4) && ap->ipa_want_se) {
12409 /*
12410 * First get the outer IP header before sending
12411 * it to ESP.
12412 */
12413 ipha_t *oipha, *iipha;
12414 mblk_t *outer_mp, *inner_mp;
12415
12416 if ((outer_mp = allocb(sizeof (ipha_t), BPRI_HI)) == NULL) {
12417 (void) mi_strlog(ill->ill_rq, 0,
12418 SL_ERROR|SL_TRACE|SL_CONSOLE,
12419 "ipsec_out_process: "
12420 "Self-Encapsulation failed: Out of memory\n");
12421 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
12422 ip_drop_output("ipIfStatsOutDiscards", mp, ill);
12423 freemsg(mp);
12424 return (ENOBUFS);
12425 }
12426 inner_mp = mp;
12427 ASSERT(inner_mp->b_datap->db_type == M_DATA);
12428 oipha = (ipha_t *)outer_mp->b_rptr;
12429 iipha = (ipha_t *)inner_mp->b_rptr;
12430 *oipha = *iipha;
12431 outer_mp->b_wptr += sizeof (ipha_t);
12432 oipha->ipha_length = htons(ntohs(iipha->ipha_length) +
12433 sizeof (ipha_t));
12434 oipha->ipha_protocol = IPPROTO_ENCAP;
12435 oipha->ipha_version_and_hdr_length =
12436 IP_SIMPLE_HDR_VERSION;
12437 oipha->ipha_hdr_checksum = 0;
12438 oipha->ipha_hdr_checksum = ip_csum_hdr(oipha);
12439 outer_mp->b_cont = inner_mp;
12440 mp = outer_mp;
12441
12442 ixa->ixa_flags |= IXAF_IPSEC_TUNNEL;
12443 }
12444
12445 /* If we need to wait for a SA then we can't return any errno */
12446 if (((ap->ipa_want_ah && (ixa->ixa_ipsec_ah_sa == NULL)) ||
12447 (ap->ipa_want_esp && (ixa->ixa_ipsec_esp_sa == NULL))) &&
12448 !ipsec_out_select_sa(mp, ixa))
12449 return (0);
12450
12451 /*
12452 * By now, we know what SA's to use. Toss over to ESP & AH
12453 * to do the heavy lifting.
12454 */
12455 if (ap->ipa_want_esp) {
12456 ASSERT(ixa->ixa_ipsec_esp_sa != NULL);
12457
12458 mp = ixa->ixa_ipsec_esp_sa->ipsa_output_func(mp, ixa);
12459 if (mp == NULL) {
12460 /*
12461 * Either it failed or is pending. In the former case
12462 * ipIfStatsInDiscards was increased.
12463 */
12464 return (0);
12465 }
12466 }
12467
12468 if (ap->ipa_want_ah) {
12469 ASSERT(ixa->ixa_ipsec_ah_sa != NULL);
12470
12471 mp = ixa->ixa_ipsec_ah_sa->ipsa_output_func(mp, ixa);
12472 if (mp == NULL) {
12473 /*
12474 * Either it failed or is pending. In the former case
12475 * ipIfStatsInDiscards was increased.
12476 */
12477 return (0);
12478 }
12479 }
12480 /*
12481 * We are done with IPsec processing. Send it over
12482 * the wire.
12483 */
12484 return (ip_output_post_ipsec(mp, ixa));
12485 }
12486
12487 /*
12488 * ioctls that go through a down/up sequence may need to wait for the down
12489 * to complete. This involves waiting for the ire and ipif refcnts to go down
12490 * to zero. Subsequently the ioctl is restarted from ipif_ill_refrele_tail.
12491 */
12492 /* ARGSUSED */
12493 void
12494 ip_reprocess_ioctl(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg)
12495 {
12496 struct iocblk *iocp;
12497 mblk_t *mp1;
12498 ip_ioctl_cmd_t *ipip;
12499 int err;
12500 sin_t *sin;
12501 struct lifreq *lifr;
12502 struct ifreq *ifr;
12503
12504 iocp = (struct iocblk *)mp->b_rptr;
12505 ASSERT(ipsq != NULL);
12506 /* Existence of mp1 verified in ip_wput_nondata */
12507 mp1 = mp->b_cont->b_cont;
12508 ipip = ip_sioctl_lookup(iocp->ioc_cmd);
12509 if (ipip->ipi_cmd == SIOCSLIFNAME || ipip->ipi_cmd == IF_UNITSEL) {
12510 /*
12511 * Special case where ipx_current_ipif is not set:
12512 * ill_phyint_reinit merged the v4 and v6 into a single ipsq.
12513 * We are here as were not able to complete the operation in
12514 * ipif_set_values because we could not become exclusive on
12515 * the new ipsq.
12516 */
12517 ill_t *ill = q->q_ptr;
12518 ipsq_current_start(ipsq, ill->ill_ipif, ipip->ipi_cmd);
12519 }
12520 ASSERT(ipsq->ipsq_xop->ipx_current_ipif != NULL);
12521
12522 if (ipip->ipi_cmd_type == IF_CMD) {
12523 /* This a old style SIOC[GS]IF* command */
12524 ifr = (struct ifreq *)mp1->b_rptr;
12525 sin = (sin_t *)&ifr->ifr_addr;
12526 } else if (ipip->ipi_cmd_type == LIF_CMD) {
12527 /* This a new style SIOC[GS]LIF* command */
12528 lifr = (struct lifreq *)mp1->b_rptr;
12529 sin = (sin_t *)&lifr->lifr_addr;
12530 } else {
12531 sin = NULL;
12532 }
12533
12534 err = (*ipip->ipi_func_restart)(ipsq->ipsq_xop->ipx_current_ipif, sin,
12535 q, mp, ipip, mp1->b_rptr);
12536
12537 DTRACE_PROBE4(ipif__ioctl, char *, "ip_reprocess_ioctl finish",
12538 int, ipip->ipi_cmd,
12539 ill_t *, ipsq->ipsq_xop->ipx_current_ipif->ipif_ill,
12540 ipif_t *, ipsq->ipsq_xop->ipx_current_ipif);
12541
12542 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), ipsq);
12543 }
12544
12545 /*
12546 * ioctl processing
12547 *
12548 * ioctl processing starts with ip_sioctl_copyin_setup(), which looks up
12549 * the ioctl command in the ioctl tables, determines the copyin data size
12550 * from the ipi_copyin_size field, and does an mi_copyin() of that size.
12551 *
12552 * ioctl processing then continues when the M_IOCDATA makes its way down to
12553 * ip_wput_nondata(). The ioctl is looked up again in the ioctl table, its
12554 * associated 'conn' is refheld till the end of the ioctl and the general
12555 * ioctl processing function ip_process_ioctl() is called to extract the
12556 * arguments and process the ioctl. To simplify extraction, ioctl commands
12557 * are "typed" based on the arguments they take (e.g., LIF_CMD which takes a
12558 * `struct lifreq'), and a common extract function (e.g., ip_extract_lifreq())
12559 * is used to extract the ioctl's arguments.
12560 *
12561 * ip_process_ioctl determines if the ioctl needs to be serialized, and if
12562 * so goes thru the serialization primitive ipsq_try_enter. Then the
12563 * appropriate function to handle the ioctl is called based on the entry in
12564 * the ioctl table. ioctl completion is encapsulated in ip_ioctl_finish
12565 * which also refreleases the 'conn' that was refheld at the start of the
12566 * ioctl. Finally ipsq_exit is called if needed to exit the ipsq.
12567 *
12568 * Many exclusive ioctls go thru an internal down up sequence as part of
12569 * the operation. For example an attempt to change the IP address of an
12570 * ipif entails ipif_down, set address, ipif_up. Bringing down the interface
12571 * does all the cleanup such as deleting all ires that use this address.
12572 * Then we need to wait till all references to the interface go away.
12573 */
12574 void
12575 ip_process_ioctl(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *arg)
12576 {
12577 struct iocblk *iocp = (struct iocblk *)mp->b_rptr;
12578 ip_ioctl_cmd_t *ipip = arg;
12579 ip_extract_func_t *extract_funcp;
12580 cmd_info_t ci;
12581 int err;
12582 boolean_t entered_ipsq = B_FALSE;
12583
12584 ip3dbg(("ip_process_ioctl: ioctl %X\n", iocp->ioc_cmd));
12585
12586 if (ipip == NULL)
12587 ipip = ip_sioctl_lookup(iocp->ioc_cmd);
12588
12589 /*
12590 * SIOCLIFADDIF needs to go thru a special path since the
12591 * ill may not exist yet. This happens in the case of lo0
12592 * which is created using this ioctl.
12593 */
12594 if (ipip->ipi_cmd == SIOCLIFADDIF) {
12595 err = ip_sioctl_addif(NULL, NULL, q, mp, NULL, NULL);
12596 DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish",
12597 int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL);
12598 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
12599 return;
12600 }
12601
12602 ci.ci_ipif = NULL;
12603 switch (ipip->ipi_cmd_type) {
12604 case MISC_CMD:
12605 case MSFILT_CMD:
12606 /*
12607 * All MISC_CMD ioctls come in here -- e.g. SIOCGLIFCONF.
12608 */
12609 if (ipip->ipi_cmd == IF_UNITSEL) {
12610 /* ioctl comes down the ill */
12611 ci.ci_ipif = ((ill_t *)q->q_ptr)->ill_ipif;
12612 ipif_refhold(ci.ci_ipif);
12613 }
12614 err = 0;
12615 ci.ci_sin = NULL;
12616 ci.ci_sin6 = NULL;
12617 ci.ci_lifr = NULL;
12618 extract_funcp = NULL;
12619 break;
12620
12621 case IF_CMD:
12622 case LIF_CMD:
12623 extract_funcp = ip_extract_lifreq;
12624 break;
12625
12626 case ARP_CMD:
12627 case XARP_CMD:
12628 extract_funcp = ip_extract_arpreq;
12629 break;
12630
12631 default:
12632 ASSERT(0);
12633 }
12634
12635 if (extract_funcp != NULL) {
12636 err = (*extract_funcp)(q, mp, ipip, &ci);
12637 if (err != 0) {
12638 DTRACE_PROBE4(ipif__ioctl,
12639 char *, "ip_process_ioctl finish err",
12640 int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL);
12641 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
12642 return;
12643 }
12644
12645 /*
12646 * All of the extraction functions return a refheld ipif.
12647 */
12648 ASSERT(ci.ci_ipif != NULL);
12649 }
12650
12651 if (!(ipip->ipi_flags & IPI_WR)) {
12652 /*
12653 * A return value of EINPROGRESS means the ioctl is
12654 * either queued and waiting for some reason or has
12655 * already completed.
12656 */
12657 err = (*ipip->ipi_func)(ci.ci_ipif, ci.ci_sin, q, mp, ipip,
12658 ci.ci_lifr);
12659 if (ci.ci_ipif != NULL) {
12660 DTRACE_PROBE4(ipif__ioctl,
12661 char *, "ip_process_ioctl finish RD",
12662 int, ipip->ipi_cmd, ill_t *, ci.ci_ipif->ipif_ill,
12663 ipif_t *, ci.ci_ipif);
12664 ipif_refrele(ci.ci_ipif);
12665 } else {
12666 DTRACE_PROBE4(ipif__ioctl,
12667 char *, "ip_process_ioctl finish RD",
12668 int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL);
12669 }
12670 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
12671 return;
12672 }
12673
12674 ASSERT(ci.ci_ipif != NULL);
12675
12676 /*
12677 * If ipsq is non-NULL, we are already being called exclusively
12678 */
12679 ASSERT(ipsq == NULL || IAM_WRITER_IPSQ(ipsq));
12680 if (ipsq == NULL) {
12681 ipsq = ipsq_try_enter(ci.ci_ipif, NULL, q, mp, ip_process_ioctl,
12682 NEW_OP, B_TRUE);
12683 if (ipsq == NULL) {
12684 ipif_refrele(ci.ci_ipif);
12685 return;
12686 }
12687 entered_ipsq = B_TRUE;
12688 }
12689 /*
12690 * Release the ipif so that ipif_down and friends that wait for
12691 * references to go away are not misled about the current ipif_refcnt
12692 * values. We are writer so we can access the ipif even after releasing
12693 * the ipif.
12694 */
12695 ipif_refrele(ci.ci_ipif);
12696
12697 ipsq_current_start(ipsq, ci.ci_ipif, ipip->ipi_cmd);
12698
12699 /*
12700 * A return value of EINPROGRESS means the ioctl is
12701 * either queued and waiting for some reason or has
12702 * already completed.
12703 */
12704 err = (*ipip->ipi_func)(ci.ci_ipif, ci.ci_sin, q, mp, ipip, ci.ci_lifr);
12705
12706 DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish WR",
12707 int, ipip->ipi_cmd,
12708 ill_t *, ci.ci_ipif == NULL ? NULL : ci.ci_ipif->ipif_ill,
12709 ipif_t *, ci.ci_ipif);
12710 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), ipsq);
12711
12712 if (entered_ipsq)
12713 ipsq_exit(ipsq);
12714 }
12715
12716 /*
12717 * Complete the ioctl. Typically ioctls use the mi package and need to
12718 * do mi_copyout/mi_copy_done.
12719 */
12720 void
12721 ip_ioctl_finish(queue_t *q, mblk_t *mp, int err, int mode, ipsq_t *ipsq)
12722 {
12723 conn_t *connp = NULL;
12724
12725 if (err == EINPROGRESS)
12726 return;
12727
12728 if (CONN_Q(q)) {
12729 connp = Q_TO_CONN(q);
12730 ASSERT(connp->conn_ref >= 2);
12731 }
12732
12733 switch (mode) {
12734 case COPYOUT:
12735 if (err == 0)
12736 mi_copyout(q, mp);
12737 else
12738 mi_copy_done(q, mp, err);
12739 break;
12740
12741 case NO_COPYOUT:
12742 mi_copy_done(q, mp, err);
12743 break;
12744
12745 default:
12746 ASSERT(mode == CONN_CLOSE); /* aborted through CONN_CLOSE */
12747 break;
12748 }
12749
12750 /*
12751 * The conn refhold and ioctlref placed on the conn at the start of the
12752 * ioctl are released here.
12753 */
12754 if (connp != NULL) {
12755 CONN_DEC_IOCTLREF(connp);
12756 CONN_OPER_PENDING_DONE(connp);
12757 }
12758
12759 if (ipsq != NULL)
12760 ipsq_current_finish(ipsq);
12761 }
12762
12763 /* Handles all non data messages */
12764 void
12765 ip_wput_nondata(queue_t *q, mblk_t *mp)
12766 {
12767 mblk_t *mp1;
12768 struct iocblk *iocp;
12769 ip_ioctl_cmd_t *ipip;
12770 conn_t *connp;
12771 cred_t *cr;
12772 char *proto_str;
12773
12774 if (CONN_Q(q))
12775 connp = Q_TO_CONN(q);
12776 else
12777 connp = NULL;
12778
12779 switch (DB_TYPE(mp)) {
12780 case M_IOCTL:
12781 /*
12782 * IOCTL processing begins in ip_sioctl_copyin_setup which
12783 * will arrange to copy in associated control structures.
12784 */
12785 ip_sioctl_copyin_setup(q, mp);
12786 return;
12787 case M_IOCDATA:
12788 /*
12789 * Ensure that this is associated with one of our trans-
12790 * parent ioctls. If it's not ours, discard it if we're
12791 * running as a driver, or pass it on if we're a module.
12792 */
12793 iocp = (struct iocblk *)mp->b_rptr;
12794 ipip = ip_sioctl_lookup(iocp->ioc_cmd);
12795 if (ipip == NULL) {
12796 if (q->q_next == NULL) {
12797 goto nak;
12798 } else {
12799 putnext(q, mp);
12800 }
12801 return;
12802 }
12803 if ((q->q_next != NULL) && !(ipip->ipi_flags & IPI_MODOK)) {
12804 /*
12805 * The ioctl is one we recognise, but is not consumed
12806 * by IP as a module and we are a module, so we drop
12807 */
12808 goto nak;
12809 }
12810
12811 /* IOCTL continuation following copyin or copyout. */
12812 if (mi_copy_state(q, mp, NULL) == -1) {
12813 /*
12814 * The copy operation failed. mi_copy_state already
12815 * cleaned up, so we're out of here.
12816 */
12817 return;
12818 }
12819 /*
12820 * If we just completed a copy in, we become writer and
12821 * continue processing in ip_sioctl_copyin_done. If it
12822 * was a copy out, we call mi_copyout again. If there is
12823 * nothing more to copy out, it will complete the IOCTL.
12824 */
12825 if (MI_COPY_DIRECTION(mp) == MI_COPY_IN) {
12826 if (!(mp1 = mp->b_cont) || !(mp1 = mp1->b_cont)) {
12827 mi_copy_done(q, mp, EPROTO);
12828 return;
12829 }
12830 /*
12831 * Check for cases that need more copying. A return
12832 * value of 0 means a second copyin has been started,
12833 * so we return; a return value of 1 means no more
12834 * copying is needed, so we continue.
12835 */
12836 if (ipip->ipi_cmd_type == MSFILT_CMD &&
12837 MI_COPY_COUNT(mp) == 1) {
12838 if (ip_copyin_msfilter(q, mp) == 0)
12839 return;
12840 }
12841 /*
12842 * Refhold the conn, till the ioctl completes. This is
12843 * needed in case the ioctl ends up in the pending mp
12844 * list. Every mp in the ipx_pending_mp list must have
12845 * a refhold on the conn to resume processing. The
12846 * refhold is released when the ioctl completes
12847 * (whether normally or abnormally). An ioctlref is also
12848 * placed on the conn to prevent TCP from removing the
12849 * queue needed to send the ioctl reply back.
12850 * In all cases ip_ioctl_finish is called to finish
12851 * the ioctl and release the refholds.
12852 */
12853 if (connp != NULL) {
12854 /* This is not a reentry */
12855 CONN_INC_REF(connp);
12856 CONN_INC_IOCTLREF(connp);
12857 } else {
12858 if (!(ipip->ipi_flags & IPI_MODOK)) {
12859 mi_copy_done(q, mp, EINVAL);
12860 return;
12861 }
12862 }
12863
12864 ip_process_ioctl(NULL, q, mp, ipip);
12865
12866 } else {
12867 mi_copyout(q, mp);
12868 }
12869 return;
12870
12871 case M_IOCNAK:
12872 /*
12873 * The only way we could get here is if a resolver didn't like
12874 * an IOCTL we sent it. This shouldn't happen.
12875 */
12876 (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE,
12877 "ip_wput_nondata: unexpected M_IOCNAK, ioc_cmd 0x%x",
12878 ((struct iocblk *)mp->b_rptr)->ioc_cmd);
12879 freemsg(mp);
12880 return;
12881 case M_IOCACK:
12882 /* /dev/ip shouldn't see this */
12883 goto nak;
12884 case M_FLUSH:
12885 if (*mp->b_rptr & FLUSHW)
12886 flushq(q, FLUSHALL);
12887 if (q->q_next) {
12888 putnext(q, mp);
12889 return;
12890 }
12891 if (*mp->b_rptr & FLUSHR) {
12892 *mp->b_rptr &= ~FLUSHW;
12893 qreply(q, mp);
12894 return;
12895 }
12896 freemsg(mp);
12897 return;
12898 case M_CTL:
12899 break;
12900 case M_PROTO:
12901 case M_PCPROTO:
12902 /*
12903 * The only PROTO messages we expect are SNMP-related.
12904 */
12905 switch (((union T_primitives *)mp->b_rptr)->type) {
12906 case T_SVR4_OPTMGMT_REQ:
12907 ip2dbg(("ip_wput_nondata: T_SVR4_OPTMGMT_REQ "
12908 "flags %x\n",
12909 ((struct T_optmgmt_req *)mp->b_rptr)->MGMT_flags));
12910
12911 if (connp == NULL) {
12912 proto_str = "T_SVR4_OPTMGMT_REQ";
12913 goto protonak;
12914 }
12915
12916 /*
12917 * All Solaris components should pass a db_credp
12918 * for this TPI message, hence we ASSERT.
12919 * But in case there is some other M_PROTO that looks
12920 * like a TPI message sent by some other kernel
12921 * component, we check and return an error.
12922 */
12923 cr = msg_getcred(mp, NULL);
12924 ASSERT(cr != NULL);
12925 if (cr == NULL) {
12926 mp = mi_tpi_err_ack_alloc(mp, TSYSERR, EINVAL);
12927 if (mp != NULL)
12928 qreply(q, mp);
12929 return;
12930 }
12931
12932 if (!snmpcom_req(q, mp, ip_snmp_set, ip_snmp_get, cr)) {
12933 proto_str = "Bad SNMPCOM request?";
12934 goto protonak;
12935 }
12936 return;
12937 default:
12938 ip1dbg(("ip_wput_nondata: dropping M_PROTO prim %u\n",
12939 (int)*(uint_t *)mp->b_rptr));
12940 freemsg(mp);
12941 return;
12942 }
12943 default:
12944 break;
12945 }
12946 if (q->q_next) {
12947 putnext(q, mp);
12948 } else
12949 freemsg(mp);
12950 return;
12951
12952 nak:
12953 iocp->ioc_error = EINVAL;
12954 mp->b_datap->db_type = M_IOCNAK;
12955 iocp->ioc_count = 0;
12956 qreply(q, mp);
12957 return;
12958
12959 protonak:
12960 cmn_err(CE_NOTE, "IP doesn't process %s as a module", proto_str);
12961 if ((mp = mi_tpi_err_ack_alloc(mp, TPROTO, EINVAL)) != NULL)
12962 qreply(q, mp);
12963 }
12964
12965 /*
12966 * Process IP options in an outbound packet. Verify that the nexthop in a
12967 * strict source route is onlink.
12968 * Returns non-zero if something fails in which case an ICMP error has been
12969 * sent and mp freed.
12970 *
12971 * Assumes the ULP has called ip_massage_options to move nexthop into ipha_dst.
12972 */
12973 int
12974 ip_output_options(mblk_t *mp, ipha_t *ipha, ip_xmit_attr_t *ixa, ill_t *ill)
12975 {
12976 ipoptp_t opts;
12977 uchar_t *opt;
12978 uint8_t optval;
12979 uint8_t optlen;
12980 ipaddr_t dst;
12981 intptr_t code = 0;
12982 ire_t *ire;
12983 ip_stack_t *ipst = ixa->ixa_ipst;
12984 ip_recv_attr_t iras;
12985
12986 ip2dbg(("ip_output_options\n"));
12987
12988 dst = ipha->ipha_dst;
12989 for (optval = ipoptp_first(&opts, ipha);
12990 optval != IPOPT_EOL;
12991 optval = ipoptp_next(&opts)) {
12992 opt = opts.ipoptp_cur;
12993 optlen = opts.ipoptp_len;
12994 ip2dbg(("ip_output_options: opt %d, len %d\n",
12995 optval, optlen));
12996 switch (optval) {
12997 uint32_t off;
12998 case IPOPT_SSRR:
12999 case IPOPT_LSRR:
13000 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
13001 ip1dbg((
13002 "ip_output_options: bad option offset\n"));
13003 code = (char *)&opt[IPOPT_OLEN] -
13004 (char *)ipha;
13005 goto param_prob;
13006 }
13007 off = opt[IPOPT_OFFSET];
13008 ip1dbg(("ip_output_options: next hop 0x%x\n",
13009 ntohl(dst)));
13010 /*
13011 * For strict: verify that dst is directly
13012 * reachable.
13013 */
13014 if (optval == IPOPT_SSRR) {
13015 ire = ire_ftable_lookup_v4(dst, 0, 0,
13016 IRE_INTERFACE, NULL, ALL_ZONES,
13017 ixa->ixa_tsl,
13018 MATCH_IRE_TYPE | MATCH_IRE_SECATTR, 0, ipst,
13019 NULL);
13020 if (ire == NULL) {
13021 ip1dbg(("ip_output_options: SSRR not"
13022 " directly reachable: 0x%x\n",
13023 ntohl(dst)));
13024 goto bad_src_route;
13025 }
13026 ire_refrele(ire);
13027 }
13028 break;
13029 case IPOPT_RR:
13030 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
13031 ip1dbg((
13032 "ip_output_options: bad option offset\n"));
13033 code = (char *)&opt[IPOPT_OLEN] -
13034 (char *)ipha;
13035 goto param_prob;
13036 }
13037 break;
13038 case IPOPT_TS:
13039 /*
13040 * Verify that length >=5 and that there is either
13041 * room for another timestamp or that the overflow
13042 * counter is not maxed out.
13043 */
13044 code = (char *)&opt[IPOPT_OLEN] - (char *)ipha;
13045 if (optlen < IPOPT_MINLEN_IT) {
13046 goto param_prob;
13047 }
13048 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
13049 ip1dbg((
13050 "ip_output_options: bad option offset\n"));
13051 code = (char *)&opt[IPOPT_OFFSET] -
13052 (char *)ipha;
13053 goto param_prob;
13054 }
13055 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
13056 case IPOPT_TS_TSONLY:
13057 off = IPOPT_TS_TIMELEN;
13058 break;
13059 case IPOPT_TS_TSANDADDR:
13060 case IPOPT_TS_PRESPEC:
13061 case IPOPT_TS_PRESPEC_RFC791:
13062 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
13063 break;
13064 default:
13065 code = (char *)&opt[IPOPT_POS_OV_FLG] -
13066 (char *)ipha;
13067 goto param_prob;
13068 }
13069 if (opt[IPOPT_OFFSET] - 1 + off > optlen &&
13070 (opt[IPOPT_POS_OV_FLG] & 0xF0) == 0xF0) {
13071 /*
13072 * No room and the overflow counter is 15
13073 * already.
13074 */
13075 goto param_prob;
13076 }
13077 break;
13078 }
13079 }
13080
13081 if ((opts.ipoptp_flags & IPOPTP_ERROR) == 0)
13082 return (0);
13083
13084 ip1dbg(("ip_output_options: error processing IP options."));
13085 code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha;
13086
13087 param_prob:
13088 bzero(&iras, sizeof (iras));
13089 iras.ira_ill = iras.ira_rill = ill;
13090 iras.ira_ruifindex = ill->ill_phyint->phyint_ifindex;
13091 iras.ira_rifindex = iras.ira_ruifindex;
13092 iras.ira_flags = IRAF_IS_IPV4;
13093
13094 ip_drop_output("ip_output_options", mp, ill);
13095 icmp_param_problem(mp, (uint8_t)code, &iras);
13096 ASSERT(!(iras.ira_flags & IRAF_IPSEC_SECURE));
13097 return (-1);
13098
13099 bad_src_route:
13100 bzero(&iras, sizeof (iras));
13101 iras.ira_ill = iras.ira_rill = ill;
13102 iras.ira_ruifindex = ill->ill_phyint->phyint_ifindex;
13103 iras.ira_rifindex = iras.ira_ruifindex;
13104 iras.ira_flags = IRAF_IS_IPV4;
13105
13106 ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ill);
13107 icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, &iras);
13108 ASSERT(!(iras.ira_flags & IRAF_IPSEC_SECURE));
13109 return (-1);
13110 }
13111
13112 /*
13113 * The maximum value of conn_drain_list_cnt is CONN_MAXDRAINCNT.
13114 * conn_drain_list_cnt can be changed by setting conn_drain_nthreads
13115 * thru /etc/system.
13116 */
13117 #define CONN_MAXDRAINCNT 64
13118
13119 static void
13120 conn_drain_init(ip_stack_t *ipst)
13121 {
13122 int i, j;
13123 idl_tx_list_t *itl_tx;
13124
13125 ipst->ips_conn_drain_list_cnt = conn_drain_nthreads;
13126
13127 if ((ipst->ips_conn_drain_list_cnt == 0) ||
13128 (ipst->ips_conn_drain_list_cnt > CONN_MAXDRAINCNT)) {
13129 /*
13130 * Default value of the number of drainers is the
13131 * number of cpus, subject to maximum of 8 drainers.
13132 */
13133 if (boot_max_ncpus != -1)
13134 ipst->ips_conn_drain_list_cnt = MIN(boot_max_ncpus, 8);
13135 else
13136 ipst->ips_conn_drain_list_cnt = MIN(max_ncpus, 8);
13137 }
13138
13139 ipst->ips_idl_tx_list =
13140 kmem_zalloc(TX_FANOUT_SIZE * sizeof (idl_tx_list_t), KM_SLEEP);
13141 for (i = 0; i < TX_FANOUT_SIZE; i++) {
13142 itl_tx = &ipst->ips_idl_tx_list[i];
13143 itl_tx->txl_drain_list =
13144 kmem_zalloc(ipst->ips_conn_drain_list_cnt *
13145 sizeof (idl_t), KM_SLEEP);
13146 mutex_init(&itl_tx->txl_lock, NULL, MUTEX_DEFAULT, NULL);
13147 for (j = 0; j < ipst->ips_conn_drain_list_cnt; j++) {
13148 mutex_init(&itl_tx->txl_drain_list[j].idl_lock, NULL,
13149 MUTEX_DEFAULT, NULL);
13150 itl_tx->txl_drain_list[j].idl_itl = itl_tx;
13151 }
13152 }
13153 }
13154
13155 static void
13156 conn_drain_fini(ip_stack_t *ipst)
13157 {
13158 int i;
13159 idl_tx_list_t *itl_tx;
13160
13161 for (i = 0; i < TX_FANOUT_SIZE; i++) {
13162 itl_tx = &ipst->ips_idl_tx_list[i];
13163 kmem_free(itl_tx->txl_drain_list,
13164 ipst->ips_conn_drain_list_cnt * sizeof (idl_t));
13165 }
13166 kmem_free(ipst->ips_idl_tx_list,
13167 TX_FANOUT_SIZE * sizeof (idl_tx_list_t));
13168 ipst->ips_idl_tx_list = NULL;
13169 }
13170
13171 /*
13172 * Flow control has blocked us from proceeding. Insert the given conn in one
13173 * of the conn drain lists. When flow control is unblocked, either ip_wsrv()
13174 * (STREAMS) or ill_flow_enable() (direct) will be called back, which in turn
13175 * will call conn_walk_drain(). See the flow control notes at the top of this
13176 * file for more details.
13177 */
13178 void
13179 conn_drain_insert(conn_t *connp, idl_tx_list_t *tx_list)
13180 {
13181 idl_t *idl = tx_list->txl_drain_list;
13182 uint_t index;
13183 ip_stack_t *ipst = connp->conn_netstack->netstack_ip;
13184
13185 mutex_enter(&connp->conn_lock);
13186 if (connp->conn_state_flags & CONN_CLOSING) {
13187 /*
13188 * The conn is closing as a result of which CONN_CLOSING
13189 * is set. Return.
13190 */
13191 mutex_exit(&connp->conn_lock);
13192 return;
13193 } else if (connp->conn_idl == NULL) {
13194 /*
13195 * Assign the next drain list round robin. We dont' use
13196 * a lock, and thus it may not be strictly round robin.
13197 * Atomicity of load/stores is enough to make sure that
13198 * conn_drain_list_index is always within bounds.
13199 */
13200 index = tx_list->txl_drain_index;
13201 ASSERT(index < ipst->ips_conn_drain_list_cnt);
13202 connp->conn_idl = &tx_list->txl_drain_list[index];
13203 index++;
13204 if (index == ipst->ips_conn_drain_list_cnt)
13205 index = 0;
13206 tx_list->txl_drain_index = index;
13207 } else {
13208 ASSERT(connp->conn_idl->idl_itl == tx_list);
13209 }
13210 mutex_exit(&connp->conn_lock);
13211
13212 idl = connp->conn_idl;
13213 mutex_enter(&idl->idl_lock);
13214 if ((connp->conn_drain_prev != NULL) ||
13215 (connp->conn_state_flags & CONN_CLOSING)) {
13216 /*
13217 * The conn is either already in the drain list or closing.
13218 * (We needed to check for CONN_CLOSING again since close can
13219 * sneak in between dropping conn_lock and acquiring idl_lock.)
13220 */
13221 mutex_exit(&idl->idl_lock);
13222 return;
13223 }
13224
13225 /*
13226 * The conn is not in the drain list. Insert it at the
13227 * tail of the drain list. The drain list is circular
13228 * and doubly linked. idl_conn points to the 1st element
13229 * in the list.
13230 */
13231 if (idl->idl_conn == NULL) {
13232 idl->idl_conn = connp;
13233 connp->conn_drain_next = connp;
13234 connp->conn_drain_prev = connp;
13235 } else {
13236 conn_t *head = idl->idl_conn;
13237
13238 connp->conn_drain_next = head;
13239 connp->conn_drain_prev = head->conn_drain_prev;
13240 head->conn_drain_prev->conn_drain_next = connp;
13241 head->conn_drain_prev = connp;
13242 }
13243 /*
13244 * For non streams based sockets assert flow control.
13245 */
13246 conn_setqfull(connp, NULL);
13247 mutex_exit(&idl->idl_lock);
13248 }
13249
13250 static void
13251 conn_drain_remove(conn_t *connp)
13252 {
13253 idl_t *idl = connp->conn_idl;
13254
13255 if (idl != NULL) {
13256 /*
13257 * Remove ourself from the drain list.
13258 */
13259 if (connp->conn_drain_next == connp) {
13260 /* Singleton in the list */
13261 ASSERT(connp->conn_drain_prev == connp);
13262 idl->idl_conn = NULL;
13263 } else {
13264 connp->conn_drain_prev->conn_drain_next =
13265 connp->conn_drain_next;
13266 connp->conn_drain_next->conn_drain_prev =
13267 connp->conn_drain_prev;
13268 if (idl->idl_conn == connp)
13269 idl->idl_conn = connp->conn_drain_next;
13270 }
13271
13272 /*
13273 * NOTE: because conn_idl is associated with a specific drain
13274 * list which in turn is tied to the index the TX ring
13275 * (txl_cookie) hashes to, and because the TX ring can change
13276 * over the lifetime of the conn_t, we must clear conn_idl so
13277 * a subsequent conn_drain_insert() will set conn_idl again
13278 * based on the latest txl_cookie.
13279 */
13280 connp->conn_idl = NULL;
13281 }
13282 connp->conn_drain_next = NULL;
13283 connp->conn_drain_prev = NULL;
13284
13285 conn_clrqfull(connp, NULL);
13286 /*
13287 * For streams based sockets open up flow control.
13288 */
13289 if (!IPCL_IS_NONSTR(connp))
13290 enableok(connp->conn_wq);
13291 }
13292
13293 /*
13294 * This conn is closing, and we are called from ip_close. OR
13295 * this conn is draining because flow-control on the ill has been relieved.
13296 *
13297 * We must also need to remove conn's on this idl from the list, and also
13298 * inform the sockfs upcalls about the change in flow-control.
13299 */
13300 static void
13301 conn_drain(conn_t *connp, boolean_t closing)
13302 {
13303 idl_t *idl;
13304 conn_t *next_connp;
13305
13306 /*
13307 * connp->conn_idl is stable at this point, and no lock is needed
13308 * to check it. If we are called from ip_close, close has already
13309 * set CONN_CLOSING, thus freezing the value of conn_idl, and
13310 * called us only because conn_idl is non-null. If we are called thru
13311 * service, conn_idl could be null, but it cannot change because
13312 * service is single-threaded per queue, and there cannot be another
13313 * instance of service trying to call conn_drain_insert on this conn
13314 * now.
13315 */
13316 ASSERT(!closing || connp == NULL || connp->conn_idl != NULL);
13317
13318 /*
13319 * If the conn doesn't exist or is not on a drain list, bail.
13320 */
13321 if (connp == NULL || connp->conn_idl == NULL ||
13322 connp->conn_drain_prev == NULL) {
13323 return;
13324 }
13325
13326 idl = connp->conn_idl;
13327 ASSERT(MUTEX_HELD(&idl->idl_lock));
13328
13329 if (!closing) {
13330 next_connp = connp->conn_drain_next;
13331 while (next_connp != connp) {
13332 conn_t *delconnp = next_connp;
13333
13334 next_connp = next_connp->conn_drain_next;
13335 conn_drain_remove(delconnp);
13336 }
13337 ASSERT(connp->conn_drain_next == idl->idl_conn);
13338 }
13339 conn_drain_remove(connp);
13340 }
13341
13342 /*
13343 * Write service routine. Shared perimeter entry point.
13344 * The device queue's messages has fallen below the low water mark and STREAMS
13345 * has backenabled the ill_wq. Send sockfs notification about flow-control on
13346 * each waiting conn.
13347 */
13348 void
13349 ip_wsrv(queue_t *q)
13350 {
13351 ill_t *ill;
13352
13353 ill = (ill_t *)q->q_ptr;
13354 if (ill->ill_state_flags == 0) {
13355 ip_stack_t *ipst = ill->ill_ipst;
13356
13357 /*
13358 * The device flow control has opened up.
13359 * Walk through conn drain lists and qenable the
13360 * first conn in each list. This makes sense only
13361 * if the stream is fully plumbed and setup.
13362 * Hence the ill_state_flags check above.
13363 */
13364 ip1dbg(("ip_wsrv: walking\n"));
13365 conn_walk_drain(ipst, &ipst->ips_idl_tx_list[0]);
13366 enableok(ill->ill_wq);
13367 }
13368 }
13369
13370 /*
13371 * Callback to disable flow control in IP.
13372 *
13373 * This is a mac client callback added when the DLD_CAPAB_DIRECT capability
13374 * is enabled.
13375 *
13376 * When MAC_TX() is not able to send any more packets, dld sets its queue
13377 * to QFULL and enable the STREAMS flow control. Later, when the underlying
13378 * driver is able to continue to send packets, it calls mac_tx_(ring_)update()
13379 * function and wakes up corresponding mac worker threads, which in turn
13380 * calls this callback function, and disables flow control.
13381 */
13382 void
13383 ill_flow_enable(void *arg, ip_mac_tx_cookie_t cookie)
13384 {
13385 ill_t *ill = (ill_t *)arg;
13386 ip_stack_t *ipst = ill->ill_ipst;
13387 idl_tx_list_t *idl_txl;
13388
13389 idl_txl = &ipst->ips_idl_tx_list[IDLHASHINDEX(cookie)];
13390 mutex_enter(&idl_txl->txl_lock);
13391 /* add code to to set a flag to indicate idl_txl is enabled */
13392 conn_walk_drain(ipst, idl_txl);
13393 mutex_exit(&idl_txl->txl_lock);
13394 }
13395
13396 /*
13397 * Flow control has been relieved and STREAMS has backenabled us; drain
13398 * all the conn lists on `tx_list'.
13399 */
13400 static void
13401 conn_walk_drain(ip_stack_t *ipst, idl_tx_list_t *tx_list)
13402 {
13403 int i;
13404 idl_t *idl;
13405
13406 IP_STAT(ipst, ip_conn_walk_drain);
13407
13408 for (i = 0; i < ipst->ips_conn_drain_list_cnt; i++) {
13409 idl = &tx_list->txl_drain_list[i];
13410 mutex_enter(&idl->idl_lock);
13411 conn_drain(idl->idl_conn, B_FALSE);
13412 mutex_exit(&idl->idl_lock);
13413 }
13414 }
13415
13416 /*
13417 * Determine if the ill and multicast aspects of that packets
13418 * "matches" the conn.
13419 */
13420 boolean_t
13421 conn_wantpacket(conn_t *connp, ip_recv_attr_t *ira, ipha_t *ipha)
13422 {
13423 ill_t *ill = ira->ira_rill;
13424 zoneid_t zoneid = ira->ira_zoneid;
13425 uint_t in_ifindex;
13426 ipaddr_t dst, src;
13427
13428 dst = ipha->ipha_dst;
13429 src = ipha->ipha_src;
13430
13431 /*
13432 * conn_incoming_ifindex is set by IP_BOUND_IF which limits
13433 * unicast, broadcast and multicast reception to
13434 * conn_incoming_ifindex.
13435 * conn_wantpacket is called for unicast, broadcast and
13436 * multicast packets.
13437 */
13438 in_ifindex = connp->conn_incoming_ifindex;
13439
13440 /* mpathd can bind to the under IPMP interface, which we allow */
13441 if (in_ifindex != 0 && in_ifindex != ill->ill_phyint->phyint_ifindex) {
13442 if (!IS_UNDER_IPMP(ill))
13443 return (B_FALSE);
13444
13445 if (in_ifindex != ipmp_ill_get_ipmp_ifindex(ill))
13446 return (B_FALSE);
13447 }
13448
13449 if (!IPCL_ZONE_MATCH(connp, zoneid))
13450 return (B_FALSE);
13451
13452 if (!(ira->ira_flags & IRAF_MULTICAST))
13453 return (B_TRUE);
13454
13455 if (connp->conn_multi_router) {
13456 /* multicast packet and multicast router socket: send up */
13457 return (B_TRUE);
13458 }
13459
13460 if (ipha->ipha_protocol == IPPROTO_PIM ||
13461 ipha->ipha_protocol == IPPROTO_RSVP)
13462 return (B_TRUE);
13463
13464 return (conn_hasmembers_ill_withsrc_v4(connp, dst, src, ira->ira_ill));
13465 }
13466
13467 void
13468 conn_setqfull(conn_t *connp, boolean_t *flow_stopped)
13469 {
13470 if (IPCL_IS_NONSTR(connp)) {
13471 (*connp->conn_upcalls->su_txq_full)
13472 (connp->conn_upper_handle, B_TRUE);
13473 if (flow_stopped != NULL)
13474 *flow_stopped = B_TRUE;
13475 } else {
13476 queue_t *q = connp->conn_wq;
13477
13478 ASSERT(q != NULL);
13479 if (!(q->q_flag & QFULL)) {
13480 mutex_enter(QLOCK(q));
13481 if (!(q->q_flag & QFULL)) {
13482 /* still need to set QFULL */
13483 q->q_flag |= QFULL;
13484 /* set flow_stopped to true under QLOCK */
13485 if (flow_stopped != NULL)
13486 *flow_stopped = B_TRUE;
13487 mutex_exit(QLOCK(q));
13488 } else {
13489 /* flow_stopped is left unchanged */
13490 mutex_exit(QLOCK(q));
13491 }
13492 }
13493 }
13494 }
13495
13496 void
13497 conn_clrqfull(conn_t *connp, boolean_t *flow_stopped)
13498 {
13499 if (IPCL_IS_NONSTR(connp)) {
13500 (*connp->conn_upcalls->su_txq_full)
13501 (connp->conn_upper_handle, B_FALSE);
13502 if (flow_stopped != NULL)
13503 *flow_stopped = B_FALSE;
13504 } else {
13505 queue_t *q = connp->conn_wq;
13506
13507 ASSERT(q != NULL);
13508 if (q->q_flag & QFULL) {
13509 mutex_enter(QLOCK(q));
13510 if (q->q_flag & QFULL) {
13511 q->q_flag &= ~QFULL;
13512 /* set flow_stopped to false under QLOCK */
13513 if (flow_stopped != NULL)
13514 *flow_stopped = B_FALSE;
13515 mutex_exit(QLOCK(q));
13516 if (q->q_flag & QWANTW)
13517 qbackenable(q, 0);
13518 } else {
13519 /* flow_stopped is left unchanged */
13520 mutex_exit(QLOCK(q));
13521 }
13522 }
13523 }
13524
13525 mutex_enter(&connp->conn_lock);
13526 connp->conn_blocked = B_FALSE;
13527 mutex_exit(&connp->conn_lock);
13528 }
13529
13530 /*
13531 * Return the length in bytes of the IPv4 headers (base header, label, and
13532 * other IP options) that will be needed based on the
13533 * ip_pkt_t structure passed by the caller.
13534 *
13535 * The returned length does not include the length of the upper level
13536 * protocol (ULP) header.
13537 * The caller needs to check that the length doesn't exceed the max for IPv4.
13538 */
13539 int
13540 ip_total_hdrs_len_v4(const ip_pkt_t *ipp)
13541 {
13542 int len;
13543
13544 len = IP_SIMPLE_HDR_LENGTH;
13545 if (ipp->ipp_fields & IPPF_LABEL_V4) {
13546 ASSERT(ipp->ipp_label_len_v4 != 0);
13547 /* We need to round up here */
13548 len += (ipp->ipp_label_len_v4 + 3) & ~3;
13549 }
13550
13551 if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) {
13552 ASSERT(ipp->ipp_ipv4_options_len != 0);
13553 ASSERT((ipp->ipp_ipv4_options_len & 3) == 0);
13554 len += ipp->ipp_ipv4_options_len;
13555 }
13556 return (len);
13557 }
13558
13559 /*
13560 * All-purpose routine to build an IPv4 header with options based
13561 * on the abstract ip_pkt_t.
13562 *
13563 * The caller has to set the source and destination address as well as
13564 * ipha_length. The caller has to massage any source route and compensate
13565 * for the ULP pseudo-header checksum due to the source route.
13566 */
13567 void
13568 ip_build_hdrs_v4(uchar_t *buf, uint_t buf_len, const ip_pkt_t *ipp,
13569 uint8_t protocol)
13570 {
13571 ipha_t *ipha = (ipha_t *)buf;
13572 uint8_t *cp;
13573
13574 /* Initialize IPv4 header */
13575 ipha->ipha_type_of_service = ipp->ipp_type_of_service;
13576 ipha->ipha_length = 0; /* Caller will set later */
13577 ipha->ipha_ident = 0;
13578 ipha->ipha_fragment_offset_and_flags = 0;
13579 ipha->ipha_ttl = ipp->ipp_unicast_hops;
13580 ipha->ipha_protocol = protocol;
13581 ipha->ipha_hdr_checksum = 0;
13582
13583 if ((ipp->ipp_fields & IPPF_ADDR) &&
13584 IN6_IS_ADDR_V4MAPPED(&ipp->ipp_addr))
13585 ipha->ipha_src = ipp->ipp_addr_v4;
13586
13587 cp = (uint8_t *)&ipha[1];
13588 if (ipp->ipp_fields & IPPF_LABEL_V4) {
13589 ASSERT(ipp->ipp_label_len_v4 != 0);
13590 bcopy(ipp->ipp_label_v4, cp, ipp->ipp_label_len_v4);
13591 cp += ipp->ipp_label_len_v4;
13592 /* We need to round up here */
13593 while ((uintptr_t)cp & 0x3) {
13594 *cp++ = IPOPT_NOP;
13595 }
13596 }
13597
13598 if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) {
13599 ASSERT(ipp->ipp_ipv4_options_len != 0);
13600 ASSERT((ipp->ipp_ipv4_options_len & 3) == 0);
13601 bcopy(ipp->ipp_ipv4_options, cp, ipp->ipp_ipv4_options_len);
13602 cp += ipp->ipp_ipv4_options_len;
13603 }
13604 ipha->ipha_version_and_hdr_length =
13605 (uint8_t)((IP_VERSION << 4) + buf_len / 4);
13606
13607 ASSERT((int)(cp - buf) == buf_len);
13608 }
13609
13610 /* Allocate the private structure */
13611 static int
13612 ip_priv_alloc(void **bufp)
13613 {
13614 void *buf;
13615
13616 if ((buf = kmem_alloc(sizeof (ip_priv_t), KM_NOSLEEP)) == NULL)
13617 return (ENOMEM);
13618
13619 *bufp = buf;
13620 return (0);
13621 }
13622
13623 /* Function to delete the private structure */
13624 void
13625 ip_priv_free(void *buf)
13626 {
13627 ASSERT(buf != NULL);
13628 kmem_free(buf, sizeof (ip_priv_t));
13629 }
13630
13631 /*
13632 * The entry point for IPPF processing.
13633 * If the classifier (IPGPC_CLASSIFY) is not loaded and configured, the
13634 * routine just returns.
13635 *
13636 * When called, ip_process generates an ipp_packet_t structure
13637 * which holds the state information for this packet and invokes the
13638 * the classifier (via ipp_packet_process). The classification, depending on
13639 * configured filters, results in a list of actions for this packet. Invoking
13640 * an action may cause the packet to be dropped, in which case we return NULL.
13641 * proc indicates the callout position for
13642 * this packet and ill is the interface this packet arrived on or will leave
13643 * on (inbound and outbound resp.).
13644 *
13645 * We do the processing on the rill (mapped to the upper if ipmp), but MIB
13646 * on the ill corrsponding to the destination IP address.
13647 */
13648 mblk_t *
13649 ip_process(ip_proc_t proc, mblk_t *mp, ill_t *rill, ill_t *ill)
13650 {
13651 ip_priv_t *priv;
13652 ipp_action_id_t aid;
13653 int rc = 0;
13654 ipp_packet_t *pp;
13655
13656 /* If the classifier is not loaded, return */
13657 if ((aid = ipp_action_lookup(IPGPC_CLASSIFY)) == IPP_ACTION_INVAL) {
13658 return (mp);
13659 }
13660
13661 ASSERT(mp != NULL);
13662
13663 /* Allocate the packet structure */
13664 rc = ipp_packet_alloc(&pp, "ip", aid);
13665 if (rc != 0)
13666 goto drop;
13667
13668 /* Allocate the private structure */
13669 rc = ip_priv_alloc((void **)&priv);
13670 if (rc != 0) {
13671 ipp_packet_free(pp);
13672 goto drop;
13673 }
13674 priv->proc = proc;
13675 priv->ill_index = ill_get_upper_ifindex(rill);
13676
13677 ipp_packet_set_private(pp, priv, ip_priv_free);
13678 ipp_packet_set_data(pp, mp);
13679
13680 /* Invoke the classifier */
13681 rc = ipp_packet_process(&pp);
13682 if (pp != NULL) {
13683 mp = ipp_packet_get_data(pp);
13684 ipp_packet_free(pp);
13685 if (rc != 0)
13686 goto drop;
13687 return (mp);
13688 } else {
13689 /* No mp to trace in ip_drop_input/ip_drop_output */
13690 mp = NULL;
13691 }
13692 drop:
13693 if (proc == IPP_LOCAL_IN || proc == IPP_FWD_IN) {
13694 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
13695 ip_drop_input("ip_process", mp, ill);
13696 } else {
13697 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
13698 ip_drop_output("ip_process", mp, ill);
13699 }
13700 freemsg(mp);
13701 return (NULL);
13702 }
13703
13704 /*
13705 * Propagate a multicast group membership operation (add/drop) on
13706 * all the interfaces crossed by the related multirt routes.
13707 * The call is considered successful if the operation succeeds
13708 * on at least one interface.
13709 *
13710 * This assumes that a set of IRE_HOST/RTF_MULTIRT has been created for the
13711 * multicast addresses with the ire argument being the first one.
13712 * We walk the bucket to find all the of those.
13713 *
13714 * Common to IPv4 and IPv6.
13715 */
13716 static int
13717 ip_multirt_apply_membership(int (*fn)(conn_t *, boolean_t,
13718 const in6_addr_t *, ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *),
13719 ire_t *ire, conn_t *connp, boolean_t checkonly, const in6_addr_t *v6group,
13720 mcast_record_t fmode, const in6_addr_t *v6src)
13721 {
13722 ire_t *ire_gw;
13723 irb_t *irb;
13724 int ifindex;
13725 int error = 0;
13726 int result;
13727 ip_stack_t *ipst = ire->ire_ipst;
13728 ipaddr_t group;
13729 boolean_t isv6;
13730 int match_flags;
13731
13732 if (IN6_IS_ADDR_V4MAPPED(v6group)) {
13733 IN6_V4MAPPED_TO_IPADDR(v6group, group);
13734 isv6 = B_FALSE;
13735 } else {
13736 isv6 = B_TRUE;
13737 }
13738
13739 irb = ire->ire_bucket;
13740 ASSERT(irb != NULL);
13741
13742 result = 0;
13743 irb_refhold(irb);
13744 for (; ire != NULL; ire = ire->ire_next) {
13745 if ((ire->ire_flags & RTF_MULTIRT) == 0)
13746 continue;
13747
13748 /* We handle -ifp routes by matching on the ill if set */
13749 match_flags = MATCH_IRE_TYPE;
13750 if (ire->ire_ill != NULL)
13751 match_flags |= MATCH_IRE_ILL;
13752
13753 if (isv6) {
13754 if (!IN6_ARE_ADDR_EQUAL(&ire->ire_addr_v6, v6group))
13755 continue;
13756
13757 ire_gw = ire_ftable_lookup_v6(&ire->ire_gateway_addr_v6,
13758 0, 0, IRE_INTERFACE, ire->ire_ill, ALL_ZONES, NULL,
13759 match_flags, 0, ipst, NULL);
13760 } else {
13761 if (ire->ire_addr != group)
13762 continue;
13763
13764 ire_gw = ire_ftable_lookup_v4(ire->ire_gateway_addr,
13765 0, 0, IRE_INTERFACE, ire->ire_ill, ALL_ZONES, NULL,
13766 match_flags, 0, ipst, NULL);
13767 }
13768 /* No interface route exists for the gateway; skip this ire. */
13769 if (ire_gw == NULL)
13770 continue;
13771 if (ire_gw->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
13772 ire_refrele(ire_gw);
13773 continue;
13774 }
13775 ASSERT(ire_gw->ire_ill != NULL); /* IRE_INTERFACE */
13776 ifindex = ire_gw->ire_ill->ill_phyint->phyint_ifindex;
13777
13778 /*
13779 * The operation is considered a success if
13780 * it succeeds at least once on any one interface.
13781 */
13782 error = fn(connp, checkonly, v6group, INADDR_ANY, ifindex,
13783 fmode, v6src);
13784 if (error == 0)
13785 result = CGTP_MCAST_SUCCESS;
13786
13787 ire_refrele(ire_gw);
13788 }
13789 irb_refrele(irb);
13790 /*
13791 * Consider the call as successful if we succeeded on at least
13792 * one interface. Otherwise, return the last encountered error.
13793 */
13794 return (result == CGTP_MCAST_SUCCESS ? 0 : error);
13795 }
13796
13797 /*
13798 * Return the expected CGTP hooks version number.
13799 */
13800 int
13801 ip_cgtp_filter_supported(void)
13802 {
13803 return (ip_cgtp_filter_rev);
13804 }
13805
13806 /*
13807 * CGTP hooks can be registered by invoking this function.
13808 * Checks that the version number matches.
13809 */
13810 int
13811 ip_cgtp_filter_register(netstackid_t stackid, cgtp_filter_ops_t *ops)
13812 {
13813 netstack_t *ns;
13814 ip_stack_t *ipst;
13815
13816 if (ops->cfo_filter_rev != CGTP_FILTER_REV)
13817 return (ENOTSUP);
13818
13819 ns = netstack_find_by_stackid(stackid);
13820 if (ns == NULL)
13821 return (EINVAL);
13822 ipst = ns->netstack_ip;
13823 ASSERT(ipst != NULL);
13824
13825 if (ipst->ips_ip_cgtp_filter_ops != NULL) {
13826 netstack_rele(ns);
13827 return (EALREADY);
13828 }
13829
13830 ipst->ips_ip_cgtp_filter_ops = ops;
13831
13832 ill_set_inputfn_all(ipst);
13833
13834 netstack_rele(ns);
13835 return (0);
13836 }
13837
13838 /*
13839 * CGTP hooks can be unregistered by invoking this function.
13840 * Returns ENXIO if there was no registration.
13841 * Returns EBUSY if the ndd variable has not been turned off.
13842 */
13843 int
13844 ip_cgtp_filter_unregister(netstackid_t stackid)
13845 {
13846 netstack_t *ns;
13847 ip_stack_t *ipst;
13848
13849 ns = netstack_find_by_stackid(stackid);
13850 if (ns == NULL)
13851 return (EINVAL);
13852 ipst = ns->netstack_ip;
13853 ASSERT(ipst != NULL);
13854
13855 if (ipst->ips_ip_cgtp_filter) {
13856 netstack_rele(ns);
13857 return (EBUSY);
13858 }
13859
13860 if (ipst->ips_ip_cgtp_filter_ops == NULL) {
13861 netstack_rele(ns);
13862 return (ENXIO);
13863 }
13864 ipst->ips_ip_cgtp_filter_ops = NULL;
13865
13866 ill_set_inputfn_all(ipst);
13867
13868 netstack_rele(ns);
13869 return (0);
13870 }
13871
13872 /*
13873 * Check whether there is a CGTP filter registration.
13874 * Returns non-zero if there is a registration, otherwise returns zero.
13875 * Note: returns zero if bad stackid.
13876 */
13877 int
13878 ip_cgtp_filter_is_registered(netstackid_t stackid)
13879 {
13880 netstack_t *ns;
13881 ip_stack_t *ipst;
13882 int ret;
13883
13884 ns = netstack_find_by_stackid(stackid);
13885 if (ns == NULL)
13886 return (0);
13887 ipst = ns->netstack_ip;
13888 ASSERT(ipst != NULL);
13889
13890 if (ipst->ips_ip_cgtp_filter_ops != NULL)
13891 ret = 1;
13892 else
13893 ret = 0;
13894
13895 netstack_rele(ns);
13896 return (ret);
13897 }
13898
13899 static int
13900 ip_squeue_switch(int val)
13901 {
13902 int rval;
13903
13904 switch (val) {
13905 case IP_SQUEUE_ENTER_NODRAIN:
13906 rval = SQ_NODRAIN;
13907 break;
13908 case IP_SQUEUE_ENTER:
13909 rval = SQ_PROCESS;
13910 break;
13911 case IP_SQUEUE_FILL:
13912 default:
13913 rval = SQ_FILL;
13914 break;
13915 }
13916 return (rval);
13917 }
13918
13919 static void *
13920 ip_kstat2_init(netstackid_t stackid, ip_stat_t *ip_statisticsp)
13921 {
13922 kstat_t *ksp;
13923
13924 ip_stat_t template = {
13925 { "ip_udp_fannorm", KSTAT_DATA_UINT64 },
13926 { "ip_udp_fanmb", KSTAT_DATA_UINT64 },
13927 { "ip_recv_pullup", KSTAT_DATA_UINT64 },
13928 { "ip_db_ref", KSTAT_DATA_UINT64 },
13929 { "ip_notaligned", KSTAT_DATA_UINT64 },
13930 { "ip_multimblk", KSTAT_DATA_UINT64 },
13931 { "ip_opt", KSTAT_DATA_UINT64 },
13932 { "ipsec_proto_ahesp", KSTAT_DATA_UINT64 },
13933 { "ip_conn_flputbq", KSTAT_DATA_UINT64 },
13934 { "ip_conn_walk_drain", KSTAT_DATA_UINT64 },
13935 { "ip_out_sw_cksum", KSTAT_DATA_UINT64 },
13936 { "ip_out_sw_cksum_bytes", KSTAT_DATA_UINT64 },
13937 { "ip_in_sw_cksum", KSTAT_DATA_UINT64 },
13938 { "ip_ire_reclaim_calls", KSTAT_DATA_UINT64 },
13939 { "ip_ire_reclaim_deleted", KSTAT_DATA_UINT64 },
13940 { "ip_nce_reclaim_calls", KSTAT_DATA_UINT64 },
13941 { "ip_nce_reclaim_deleted", KSTAT_DATA_UINT64 },
13942 { "ip_dce_reclaim_calls", KSTAT_DATA_UINT64 },
13943 { "ip_dce_reclaim_deleted", KSTAT_DATA_UINT64 },
13944 { "ip_tcp_in_full_hw_cksum_err", KSTAT_DATA_UINT64 },
13945 { "ip_tcp_in_part_hw_cksum_err", KSTAT_DATA_UINT64 },
13946 { "ip_tcp_in_sw_cksum_err", KSTAT_DATA_UINT64 },
13947 { "ip_udp_in_full_hw_cksum_err", KSTAT_DATA_UINT64 },
13948 { "ip_udp_in_part_hw_cksum_err", KSTAT_DATA_UINT64 },
13949 { "ip_udp_in_sw_cksum_err", KSTAT_DATA_UINT64 },
13950 { "conn_in_recvdstaddr", KSTAT_DATA_UINT64 },
13951 { "conn_in_recvopts", KSTAT_DATA_UINT64 },
13952 { "conn_in_recvif", KSTAT_DATA_UINT64 },
13953 { "conn_in_recvslla", KSTAT_DATA_UINT64 },
13954 { "conn_in_recvucred", KSTAT_DATA_UINT64 },
13955 { "conn_in_recvttl", KSTAT_DATA_UINT64 },
13956 { "conn_in_recvhopopts", KSTAT_DATA_UINT64 },
13957 { "conn_in_recvhoplimit", KSTAT_DATA_UINT64 },
13958 { "conn_in_recvdstopts", KSTAT_DATA_UINT64 },
13959 { "conn_in_recvrthdrdstopts", KSTAT_DATA_UINT64 },
13960 { "conn_in_recvrthdr", KSTAT_DATA_UINT64 },
13961 { "conn_in_recvpktinfo", KSTAT_DATA_UINT64 },
13962 { "conn_in_recvtclass", KSTAT_DATA_UINT64 },
13963 { "conn_in_timestamp", KSTAT_DATA_UINT64 },
13964 };
13965
13966 ksp = kstat_create_netstack("ip", 0, "ipstat", "net",
13967 KSTAT_TYPE_NAMED, sizeof (template) / sizeof (kstat_named_t),
13968 KSTAT_FLAG_VIRTUAL, stackid);
13969
13970 if (ksp == NULL)
13971 return (NULL);
13972
13973 bcopy(&template, ip_statisticsp, sizeof (template));
13974 ksp->ks_data = (void *)ip_statisticsp;
13975 ksp->ks_private = (void *)(uintptr_t)stackid;
13976
13977 kstat_install(ksp);
13978 return (ksp);
13979 }
13980
13981 static void
13982 ip_kstat2_fini(netstackid_t stackid, kstat_t *ksp)
13983 {
13984 if (ksp != NULL) {
13985 ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private);
13986 kstat_delete_netstack(ksp, stackid);
13987 }
13988 }
13989
13990 static void *
13991 ip_kstat_init(netstackid_t stackid, ip_stack_t *ipst)
13992 {
13993 kstat_t *ksp;
13994
13995 ip_named_kstat_t template = {
13996 { "forwarding", KSTAT_DATA_UINT32, {{ 0 }}},
13997 { "defaultTTL", KSTAT_DATA_UINT32, {{ 0 }}},
13998 { "inReceives", KSTAT_DATA_UINT64, {{ 0 }}},
13999 { "inHdrErrors", KSTAT_DATA_UINT32, {{ 0 }}},
14000 { "inAddrErrors", KSTAT_DATA_UINT32, {{ 0 }}},
14001 { "forwDatagrams", KSTAT_DATA_UINT64, {{ 0 }}},
14002 { "inUnknownProtos", KSTAT_DATA_UINT32, {{ 0 }}},
14003 { "inDiscards", KSTAT_DATA_UINT32, {{ 0 }}},
14004 { "inDelivers", KSTAT_DATA_UINT64, {{ 0 }}},
14005 { "outRequests", KSTAT_DATA_UINT64, {{ 0 }}},
14006 { "outDiscards", KSTAT_DATA_UINT32, {{ 0 }}},
14007 { "outNoRoutes", KSTAT_DATA_UINT32, {{ 0 }}},
14008 { "reasmTimeout", KSTAT_DATA_UINT32, {{ 0 }}},
14009 { "reasmReqds", KSTAT_DATA_UINT32, {{ 0 }}},
14010 { "reasmOKs", KSTAT_DATA_UINT32, {{ 0 }}},
14011 { "reasmFails", KSTAT_DATA_UINT32, {{ 0 }}},
14012 { "fragOKs", KSTAT_DATA_UINT32, {{ 0 }}},
14013 { "fragFails", KSTAT_DATA_UINT32, {{ 0 }}},
14014 { "fragCreates", KSTAT_DATA_UINT32, {{ 0 }}},
14015 { "addrEntrySize", KSTAT_DATA_INT32, {{ 0 }}},
14016 { "routeEntrySize", KSTAT_DATA_INT32, {{ 0 }}},
14017 { "netToMediaEntrySize", KSTAT_DATA_INT32, {{ 0 }}},
14018 { "routingDiscards", KSTAT_DATA_UINT32, {{ 0 }}},
14019 { "inErrs", KSTAT_DATA_UINT32, {{ 0 }}},
14020 { "noPorts", KSTAT_DATA_UINT32, {{ 0 }}},
14021 { "inCksumErrs", KSTAT_DATA_UINT32, {{ 0 }}},
14022 { "reasmDuplicates", KSTAT_DATA_UINT32, {{ 0 }}},
14023 { "reasmPartDups", KSTAT_DATA_UINT32, {{ 0 }}},
14024 { "forwProhibits", KSTAT_DATA_UINT32, {{ 0 }}},
14025 { "udpInCksumErrs", KSTAT_DATA_UINT32, {{ 0 }}},
14026 { "udpInOverflows", KSTAT_DATA_UINT32, {{ 0 }}},
14027 { "rawipInOverflows", KSTAT_DATA_UINT32, {{ 0 }}},
14028 { "ipsecInSucceeded", KSTAT_DATA_UINT32, {{ 0 }}},
14029 { "ipsecInFailed", KSTAT_DATA_INT32, {{ 0 }}},
14030 { "memberEntrySize", KSTAT_DATA_INT32, {{ 0 }}},
14031 { "inIPv6", KSTAT_DATA_UINT32, {{ 0 }}},
14032 { "outIPv6", KSTAT_DATA_UINT32, {{ 0 }}},
14033 { "outSwitchIPv6", KSTAT_DATA_UINT32, {{ 0 }}},
14034 };
14035
14036 ksp = kstat_create_netstack("ip", 0, "ip", "mib2", KSTAT_TYPE_NAMED,
14037 NUM_OF_FIELDS(ip_named_kstat_t), 0, stackid);
14038 if (ksp == NULL || ksp->ks_data == NULL)
14039 return (NULL);
14040
14041 template.forwarding.value.ui32 = WE_ARE_FORWARDING(ipst) ? 1:2;
14042 template.defaultTTL.value.ui32 = (uint32_t)ipst->ips_ip_def_ttl;
14043 template.reasmTimeout.value.ui32 = ipst->ips_ip_reassembly_timeout;
14044 template.addrEntrySize.value.i32 = sizeof (mib2_ipAddrEntry_t);
14045 template.routeEntrySize.value.i32 = sizeof (mib2_ipRouteEntry_t);
14046
14047 template.netToMediaEntrySize.value.i32 =
14048 sizeof (mib2_ipNetToMediaEntry_t);
14049
14050 template.memberEntrySize.value.i32 = sizeof (ipv6_member_t);
14051
14052 bcopy(&template, ksp->ks_data, sizeof (template));
14053 ksp->ks_update = ip_kstat_update;
14054 ksp->ks_private = (void *)(uintptr_t)stackid;
14055
14056 kstat_install(ksp);
14057 return (ksp);
14058 }
14059
14060 static void
14061 ip_kstat_fini(netstackid_t stackid, kstat_t *ksp)
14062 {
14063 if (ksp != NULL) {
14064 ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private);
14065 kstat_delete_netstack(ksp, stackid);
14066 }
14067 }
14068
14069 static int
14070 ip_kstat_update(kstat_t *kp, int rw)
14071 {
14072 ip_named_kstat_t *ipkp;
14073 mib2_ipIfStatsEntry_t ipmib;
14074 ill_walk_context_t ctx;
14075 ill_t *ill;
14076 netstackid_t stackid = (zoneid_t)(uintptr_t)kp->ks_private;
14077 netstack_t *ns;
14078 ip_stack_t *ipst;
14079
14080 if (kp == NULL || kp->ks_data == NULL)
14081 return (EIO);
14082
14083 if (rw == KSTAT_WRITE)
14084 return (EACCES);
14085
14086 ns = netstack_find_by_stackid(stackid);
14087 if (ns == NULL)
14088 return (-1);
14089 ipst = ns->netstack_ip;
14090 if (ipst == NULL) {
14091 netstack_rele(ns);
14092 return (-1);
14093 }
14094 ipkp = (ip_named_kstat_t *)kp->ks_data;
14095
14096 bcopy(&ipst->ips_ip_mib, &ipmib, sizeof (ipmib));
14097 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
14098 ill = ILL_START_WALK_V4(&ctx, ipst);
14099 for (; ill != NULL; ill = ill_next(&ctx, ill))
14100 ip_mib2_add_ip_stats(&ipmib, ill->ill_ip_mib);
14101 rw_exit(&ipst->ips_ill_g_lock);
14102
14103 ipkp->forwarding.value.ui32 = ipmib.ipIfStatsForwarding;
14104 ipkp->defaultTTL.value.ui32 = ipmib.ipIfStatsDefaultTTL;
14105 ipkp->inReceives.value.ui64 = ipmib.ipIfStatsHCInReceives;
14106 ipkp->inHdrErrors.value.ui32 = ipmib.ipIfStatsInHdrErrors;
14107 ipkp->inAddrErrors.value.ui32 = ipmib.ipIfStatsInAddrErrors;
14108 ipkp->forwDatagrams.value.ui64 = ipmib.ipIfStatsHCOutForwDatagrams;
14109 ipkp->inUnknownProtos.value.ui32 = ipmib.ipIfStatsInUnknownProtos;
14110 ipkp->inDiscards.value.ui32 = ipmib.ipIfStatsInDiscards;
14111 ipkp->inDelivers.value.ui64 = ipmib.ipIfStatsHCInDelivers;
14112 ipkp->outRequests.value.ui64 = ipmib.ipIfStatsHCOutRequests;
14113 ipkp->outDiscards.value.ui32 = ipmib.ipIfStatsOutDiscards;
14114 ipkp->outNoRoutes.value.ui32 = ipmib.ipIfStatsOutNoRoutes;
14115 ipkp->reasmTimeout.value.ui32 = ipst->ips_ip_reassembly_timeout;
14116 ipkp->reasmReqds.value.ui32 = ipmib.ipIfStatsReasmReqds;
14117 ipkp->reasmOKs.value.ui32 = ipmib.ipIfStatsReasmOKs;
14118 ipkp->reasmFails.value.ui32 = ipmib.ipIfStatsReasmFails;
14119 ipkp->fragOKs.value.ui32 = ipmib.ipIfStatsOutFragOKs;
14120 ipkp->fragFails.value.ui32 = ipmib.ipIfStatsOutFragFails;
14121 ipkp->fragCreates.value.ui32 = ipmib.ipIfStatsOutFragCreates;
14122
14123 ipkp->routingDiscards.value.ui32 = 0;
14124 ipkp->inErrs.value.ui32 = ipmib.tcpIfStatsInErrs;
14125 ipkp->noPorts.value.ui32 = ipmib.udpIfStatsNoPorts;
14126 ipkp->inCksumErrs.value.ui32 = ipmib.ipIfStatsInCksumErrs;
14127 ipkp->reasmDuplicates.value.ui32 = ipmib.ipIfStatsReasmDuplicates;
14128 ipkp->reasmPartDups.value.ui32 = ipmib.ipIfStatsReasmPartDups;
14129 ipkp->forwProhibits.value.ui32 = ipmib.ipIfStatsForwProhibits;
14130 ipkp->udpInCksumErrs.value.ui32 = ipmib.udpIfStatsInCksumErrs;
14131 ipkp->udpInOverflows.value.ui32 = ipmib.udpIfStatsInOverflows;
14132 ipkp->rawipInOverflows.value.ui32 = ipmib.rawipIfStatsInOverflows;
14133 ipkp->ipsecInSucceeded.value.ui32 = ipmib.ipsecIfStatsInSucceeded;
14134 ipkp->ipsecInFailed.value.i32 = ipmib.ipsecIfStatsInFailed;
14135
14136 ipkp->inIPv6.value.ui32 = ipmib.ipIfStatsInWrongIPVersion;
14137 ipkp->outIPv6.value.ui32 = ipmib.ipIfStatsOutWrongIPVersion;
14138 ipkp->outSwitchIPv6.value.ui32 = ipmib.ipIfStatsOutSwitchIPVersion;
14139
14140 netstack_rele(ns);
14141
14142 return (0);
14143 }
14144
14145 static void *
14146 icmp_kstat_init(netstackid_t stackid)
14147 {
14148 kstat_t *ksp;
14149
14150 icmp_named_kstat_t template = {
14151 { "inMsgs", KSTAT_DATA_UINT32 },
14152 { "inErrors", KSTAT_DATA_UINT32 },
14153 { "inDestUnreachs", KSTAT_DATA_UINT32 },
14154 { "inTimeExcds", KSTAT_DATA_UINT32 },
14155 { "inParmProbs", KSTAT_DATA_UINT32 },
14156 { "inSrcQuenchs", KSTAT_DATA_UINT32 },
14157 { "inRedirects", KSTAT_DATA_UINT32 },
14158 { "inEchos", KSTAT_DATA_UINT32 },
14159 { "inEchoReps", KSTAT_DATA_UINT32 },
14160 { "inTimestamps", KSTAT_DATA_UINT32 },
14161 { "inTimestampReps", KSTAT_DATA_UINT32 },
14162 { "inAddrMasks", KSTAT_DATA_UINT32 },
14163 { "inAddrMaskReps", KSTAT_DATA_UINT32 },
14164 { "outMsgs", KSTAT_DATA_UINT32 },
14165 { "outErrors", KSTAT_DATA_UINT32 },
14166 { "outDestUnreachs", KSTAT_DATA_UINT32 },
14167 { "outTimeExcds", KSTAT_DATA_UINT32 },
14168 { "outParmProbs", KSTAT_DATA_UINT32 },
14169 { "outSrcQuenchs", KSTAT_DATA_UINT32 },
14170 { "outRedirects", KSTAT_DATA_UINT32 },
14171 { "outEchos", KSTAT_DATA_UINT32 },
14172 { "outEchoReps", KSTAT_DATA_UINT32 },
14173 { "outTimestamps", KSTAT_DATA_UINT32 },
14174 { "outTimestampReps", KSTAT_DATA_UINT32 },
14175 { "outAddrMasks", KSTAT_DATA_UINT32 },
14176 { "outAddrMaskReps", KSTAT_DATA_UINT32 },
14177 { "inChksumErrs", KSTAT_DATA_UINT32 },
14178 { "inUnknowns", KSTAT_DATA_UINT32 },
14179 { "inFragNeeded", KSTAT_DATA_UINT32 },
14180 { "outFragNeeded", KSTAT_DATA_UINT32 },
14181 { "outDrops", KSTAT_DATA_UINT32 },
14182 { "inOverFlows", KSTAT_DATA_UINT32 },
14183 { "inBadRedirects", KSTAT_DATA_UINT32 },
14184 };
14185
14186 ksp = kstat_create_netstack("ip", 0, "icmp", "mib2", KSTAT_TYPE_NAMED,
14187 NUM_OF_FIELDS(icmp_named_kstat_t), 0, stackid);
14188 if (ksp == NULL || ksp->ks_data == NULL)
14189 return (NULL);
14190
14191 bcopy(&template, ksp->ks_data, sizeof (template));
14192
14193 ksp->ks_update = icmp_kstat_update;
14194 ksp->ks_private = (void *)(uintptr_t)stackid;
14195
14196 kstat_install(ksp);
14197 return (ksp);
14198 }
14199
14200 static void
14201 icmp_kstat_fini(netstackid_t stackid, kstat_t *ksp)
14202 {
14203 if (ksp != NULL) {
14204 ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private);
14205 kstat_delete_netstack(ksp, stackid);
14206 }
14207 }
14208
14209 static int
14210 icmp_kstat_update(kstat_t *kp, int rw)
14211 {
14212 icmp_named_kstat_t *icmpkp;
14213 netstackid_t stackid = (zoneid_t)(uintptr_t)kp->ks_private;
14214 netstack_t *ns;
14215 ip_stack_t *ipst;
14216
14217 if ((kp == NULL) || (kp->ks_data == NULL))
14218 return (EIO);
14219
14220 if (rw == KSTAT_WRITE)
14221 return (EACCES);
14222
14223 ns = netstack_find_by_stackid(stackid);
14224 if (ns == NULL)
14225 return (-1);
14226 ipst = ns->netstack_ip;
14227 if (ipst == NULL) {
14228 netstack_rele(ns);
14229 return (-1);
14230 }
14231 icmpkp = (icmp_named_kstat_t *)kp->ks_data;
14232
14233 icmpkp->inMsgs.value.ui32 = ipst->ips_icmp_mib.icmpInMsgs;
14234 icmpkp->inErrors.value.ui32 = ipst->ips_icmp_mib.icmpInErrors;
14235 icmpkp->inDestUnreachs.value.ui32 =
14236 ipst->ips_icmp_mib.icmpInDestUnreachs;
14237 icmpkp->inTimeExcds.value.ui32 = ipst->ips_icmp_mib.icmpInTimeExcds;
14238 icmpkp->inParmProbs.value.ui32 = ipst->ips_icmp_mib.icmpInParmProbs;
14239 icmpkp->inSrcQuenchs.value.ui32 = ipst->ips_icmp_mib.icmpInSrcQuenchs;
14240 icmpkp->inRedirects.value.ui32 = ipst->ips_icmp_mib.icmpInRedirects;
14241 icmpkp->inEchos.value.ui32 = ipst->ips_icmp_mib.icmpInEchos;
14242 icmpkp->inEchoReps.value.ui32 = ipst->ips_icmp_mib.icmpInEchoReps;
14243 icmpkp->inTimestamps.value.ui32 = ipst->ips_icmp_mib.icmpInTimestamps;
14244 icmpkp->inTimestampReps.value.ui32 =
14245 ipst->ips_icmp_mib.icmpInTimestampReps;
14246 icmpkp->inAddrMasks.value.ui32 = ipst->ips_icmp_mib.icmpInAddrMasks;
14247 icmpkp->inAddrMaskReps.value.ui32 =
14248 ipst->ips_icmp_mib.icmpInAddrMaskReps;
14249 icmpkp->outMsgs.value.ui32 = ipst->ips_icmp_mib.icmpOutMsgs;
14250 icmpkp->outErrors.value.ui32 = ipst->ips_icmp_mib.icmpOutErrors;
14251 icmpkp->outDestUnreachs.value.ui32 =
14252 ipst->ips_icmp_mib.icmpOutDestUnreachs;
14253 icmpkp->outTimeExcds.value.ui32 = ipst->ips_icmp_mib.icmpOutTimeExcds;
14254 icmpkp->outParmProbs.value.ui32 = ipst->ips_icmp_mib.icmpOutParmProbs;
14255 icmpkp->outSrcQuenchs.value.ui32 =
14256 ipst->ips_icmp_mib.icmpOutSrcQuenchs;
14257 icmpkp->outRedirects.value.ui32 = ipst->ips_icmp_mib.icmpOutRedirects;
14258 icmpkp->outEchos.value.ui32 = ipst->ips_icmp_mib.icmpOutEchos;
14259 icmpkp->outEchoReps.value.ui32 = ipst->ips_icmp_mib.icmpOutEchoReps;
14260 icmpkp->outTimestamps.value.ui32 =
14261 ipst->ips_icmp_mib.icmpOutTimestamps;
14262 icmpkp->outTimestampReps.value.ui32 =
14263 ipst->ips_icmp_mib.icmpOutTimestampReps;
14264 icmpkp->outAddrMasks.value.ui32 =
14265 ipst->ips_icmp_mib.icmpOutAddrMasks;
14266 icmpkp->outAddrMaskReps.value.ui32 =
14267 ipst->ips_icmp_mib.icmpOutAddrMaskReps;
14268 icmpkp->inCksumErrs.value.ui32 = ipst->ips_icmp_mib.icmpInCksumErrs;
14269 icmpkp->inUnknowns.value.ui32 = ipst->ips_icmp_mib.icmpInUnknowns;
14270 icmpkp->inFragNeeded.value.ui32 = ipst->ips_icmp_mib.icmpInFragNeeded;
14271 icmpkp->outFragNeeded.value.ui32 =
14272 ipst->ips_icmp_mib.icmpOutFragNeeded;
14273 icmpkp->outDrops.value.ui32 = ipst->ips_icmp_mib.icmpOutDrops;
14274 icmpkp->inOverflows.value.ui32 = ipst->ips_icmp_mib.icmpInOverflows;
14275 icmpkp->inBadRedirects.value.ui32 =
14276 ipst->ips_icmp_mib.icmpInBadRedirects;
14277
14278 netstack_rele(ns);
14279 return (0);
14280 }
14281
14282 /*
14283 * This is the fanout function for raw socket opened for SCTP. Note
14284 * that it is called after SCTP checks that there is no socket which
14285 * wants a packet. Then before SCTP handles this out of the blue packet,
14286 * this function is called to see if there is any raw socket for SCTP.
14287 * If there is and it is bound to the correct address, the packet will
14288 * be sent to that socket. Note that only one raw socket can be bound to
14289 * a port. This is assured in ipcl_sctp_hash_insert();
14290 */
14291 void
14292 ip_fanout_sctp_raw(mblk_t *mp, ipha_t *ipha, ip6_t *ip6h, uint32_t ports,
14293 ip_recv_attr_t *ira)
14294 {
14295 conn_t *connp;
14296 queue_t *rq;
14297 boolean_t secure;
14298 ill_t *ill = ira->ira_ill;
14299 ip_stack_t *ipst = ill->ill_ipst;
14300 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
14301 sctp_stack_t *sctps = ipst->ips_netstack->netstack_sctp;
14302 iaflags_t iraflags = ira->ira_flags;
14303 ill_t *rill = ira->ira_rill;
14304
14305 secure = iraflags & IRAF_IPSEC_SECURE;
14306
14307 connp = ipcl_classify_raw(mp, IPPROTO_SCTP, ports, ipha, ip6h,
14308 ira, ipst);
14309 if (connp == NULL) {
14310 /*
14311 * Although raw sctp is not summed, OOB chunks must be.
14312 * Drop the packet here if the sctp checksum failed.
14313 */
14314 if (iraflags & IRAF_SCTP_CSUM_ERR) {
14315 SCTPS_BUMP_MIB(sctps, sctpChecksumError);
14316 freemsg(mp);
14317 return;
14318 }
14319 ira->ira_ill = ira->ira_rill = NULL;
14320 sctp_ootb_input(mp, ira, ipst);
14321 ira->ira_ill = ill;
14322 ira->ira_rill = rill;
14323 return;
14324 }
14325 rq = connp->conn_rq;
14326 if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld : !canputnext(rq)) {
14327 CONN_DEC_REF(connp);
14328 BUMP_MIB(ill->ill_ip_mib, rawipIfStatsInOverflows);
14329 freemsg(mp);
14330 return;
14331 }
14332 if (((iraflags & IRAF_IS_IPV4) ?
14333 CONN_INBOUND_POLICY_PRESENT(connp, ipss) :
14334 CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) ||
14335 secure) {
14336 mp = ipsec_check_inbound_policy(mp, connp, ipha,
14337 ip6h, ira);
14338 if (mp == NULL) {
14339 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
14340 /* Note that mp is NULL */
14341 ip_drop_input("ipIfStatsInDiscards", mp, ill);
14342 CONN_DEC_REF(connp);
14343 return;
14344 }
14345 }
14346
14347 if (iraflags & IRAF_ICMP_ERROR) {
14348 (connp->conn_recvicmp)(connp, mp, NULL, ira);
14349 } else {
14350 ill_t *rill = ira->ira_rill;
14351
14352 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers);
14353 /* This is the SOCK_RAW, IPPROTO_SCTP case. */
14354 ira->ira_ill = ira->ira_rill = NULL;
14355 (connp->conn_recv)(connp, mp, NULL, ira);
14356 ira->ira_ill = ill;
14357 ira->ira_rill = rill;
14358 }
14359 CONN_DEC_REF(connp);
14360 }
14361
14362 /*
14363 * Free a packet that has the link-layer dl_unitdata_req_t or fast-path
14364 * header before the ip payload.
14365 */
14366 static void
14367 ip_xmit_flowctl_drop(ill_t *ill, mblk_t *mp, boolean_t is_fp_mp, int fp_mp_len)
14368 {
14369 int len = (mp->b_wptr - mp->b_rptr);
14370 mblk_t *ip_mp;
14371
14372 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
14373 if (is_fp_mp || len != fp_mp_len) {
14374 if (len > fp_mp_len) {
14375 /*
14376 * fastpath header and ip header in the first mblk
14377 */
14378 mp->b_rptr += fp_mp_len;
14379 } else {
14380 /*
14381 * ip_xmit_attach_llhdr had to prepend an mblk to
14382 * attach the fastpath header before ip header.
14383 */
14384 ip_mp = mp->b_cont;
14385 freeb(mp);
14386 mp = ip_mp;
14387 mp->b_rptr += (fp_mp_len - len);
14388 }
14389 } else {
14390 ip_mp = mp->b_cont;
14391 freeb(mp);
14392 mp = ip_mp;
14393 }
14394 ip_drop_output("ipIfStatsOutDiscards - flow ctl", mp, ill);
14395 freemsg(mp);
14396 }
14397
14398 /*
14399 * Normal post fragmentation function.
14400 *
14401 * Send a packet using the passed in nce. This handles both IPv4 and IPv6
14402 * using the same state machine.
14403 *
14404 * We return an error on failure. In particular we return EWOULDBLOCK
14405 * when the driver flow controls. In that case this ensures that ip_wsrv runs
14406 * (currently by canputnext failure resulting in backenabling from GLD.)
14407 * This allows the callers of conn_ip_output() to use EWOULDBLOCK as an
14408 * indication that they can flow control until ip_wsrv() tells then to restart.
14409 *
14410 * If the nce passed by caller is incomplete, this function
14411 * queues the packet and if necessary, sends ARP request and bails.
14412 * If the Neighbor Cache passed is fully resolved, we simply prepend
14413 * the link-layer header to the packet, do ipsec hw acceleration
14414 * work if necessary, and send the packet out on the wire.
14415 */
14416 /* ARGSUSED6 */
14417 int
14418 ip_xmit(mblk_t *mp, nce_t *nce, iaflags_t ixaflags, uint_t pkt_len,
14419 uint32_t xmit_hint, zoneid_t szone, zoneid_t nolzid, uintptr_t *ixacookie)
14420 {
14421 queue_t *wq;
14422 ill_t *ill = nce->nce_ill;
14423 ip_stack_t *ipst = ill->ill_ipst;
14424 uint64_t delta;
14425 boolean_t isv6 = ill->ill_isv6;
14426 boolean_t fp_mp;
14427 ncec_t *ncec = nce->nce_common;
14428 int64_t now = LBOLT_FASTPATH64;
14429 boolean_t is_probe;
14430
14431 DTRACE_PROBE1(ip__xmit, nce_t *, nce);
14432
14433 ASSERT(mp != NULL);
14434 ASSERT(mp->b_datap->db_type == M_DATA);
14435 ASSERT(pkt_len == msgdsize(mp));
14436
14437 /*
14438 * If we have already been here and are coming back after ARP/ND.
14439 * the IXAF_NO_TRACE flag is set. We skip FW_HOOKS, DTRACE and ipobs
14440 * in that case since they have seen the packet when it came here
14441 * the first time.
14442 */
14443 if (ixaflags & IXAF_NO_TRACE)
14444 goto sendit;
14445
14446 if (ixaflags & IXAF_IS_IPV4) {
14447 ipha_t *ipha = (ipha_t *)mp->b_rptr;
14448
14449 ASSERT(!isv6);
14450 ASSERT(pkt_len == ntohs(((ipha_t *)mp->b_rptr)->ipha_length));
14451 if (HOOKS4_INTERESTED_PHYSICAL_OUT(ipst) &&
14452 !(ixaflags & IXAF_NO_PFHOOK)) {
14453 int error;
14454
14455 FW_HOOKS(ipst->ips_ip4_physical_out_event,
14456 ipst->ips_ipv4firewall_physical_out,
14457 NULL, ill, ipha, mp, mp, 0, ipst, error);
14458 DTRACE_PROBE1(ip4__physical__out__end,
14459 mblk_t *, mp);
14460 if (mp == NULL)
14461 return (error);
14462
14463 /* The length could have changed */
14464 pkt_len = msgdsize(mp);
14465 }
14466 if (ipst->ips_ip4_observe.he_interested) {
14467 /*
14468 * Note that for TX the zoneid is the sending
14469 * zone, whether or not MLP is in play.
14470 * Since the szone argument is the IP zoneid (i.e.,
14471 * zero for exclusive-IP zones) and ipobs wants
14472 * the system zoneid, we map it here.
14473 */
14474 szone = IP_REAL_ZONEID(szone, ipst);
14475
14476 /*
14477 * On the outbound path the destination zone will be
14478 * unknown as we're sending this packet out on the
14479 * wire.
14480 */
14481 ipobs_hook(mp, IPOBS_HOOK_OUTBOUND, szone, ALL_ZONES,
14482 ill, ipst);
14483 }
14484 DTRACE_IP7(send, mblk_t *, mp, conn_t *, NULL,
14485 void_ip_t *, ipha, __dtrace_ipsr_ill_t *, ill,
14486 ipha_t *, ipha, ip6_t *, NULL, int, 0);
14487 } else {
14488 ip6_t *ip6h = (ip6_t *)mp->b_rptr;
14489
14490 ASSERT(isv6);
14491 ASSERT(pkt_len ==
14492 ntohs(((ip6_t *)mp->b_rptr)->ip6_plen) + IPV6_HDR_LEN);
14493 if (HOOKS6_INTERESTED_PHYSICAL_OUT(ipst) &&
14494 !(ixaflags & IXAF_NO_PFHOOK)) {
14495 int error;
14496
14497 FW_HOOKS6(ipst->ips_ip6_physical_out_event,
14498 ipst->ips_ipv6firewall_physical_out,
14499 NULL, ill, ip6h, mp, mp, 0, ipst, error);
14500 DTRACE_PROBE1(ip6__physical__out__end,
14501 mblk_t *, mp);
14502 if (mp == NULL)
14503 return (error);
14504
14505 /* The length could have changed */
14506 pkt_len = msgdsize(mp);
14507 }
14508 if (ipst->ips_ip6_observe.he_interested) {
14509 /* See above */
14510 szone = IP_REAL_ZONEID(szone, ipst);
14511
14512 ipobs_hook(mp, IPOBS_HOOK_OUTBOUND, szone, ALL_ZONES,
14513 ill, ipst);
14514 }
14515 DTRACE_IP7(send, mblk_t *, mp, conn_t *, NULL,
14516 void_ip_t *, ip6h, __dtrace_ipsr_ill_t *, ill,
14517 ipha_t *, NULL, ip6_t *, ip6h, int, 0);
14518 }
14519
14520 sendit:
14521 /*
14522 * We check the state without a lock because the state can never
14523 * move "backwards" to initial or incomplete.
14524 */
14525 switch (ncec->ncec_state) {
14526 case ND_REACHABLE:
14527 case ND_STALE:
14528 case ND_DELAY:
14529 case ND_PROBE:
14530 mp = ip_xmit_attach_llhdr(mp, nce);
14531 if (mp == NULL) {
14532 /*
14533 * ip_xmit_attach_llhdr has increased
14534 * ipIfStatsOutDiscards and called ip_drop_output()
14535 */
14536 return (ENOBUFS);
14537 }
14538 /*
14539 * check if nce_fastpath completed and we tagged on a
14540 * copy of nce_fp_mp in ip_xmit_attach_llhdr().
14541 */
14542 fp_mp = (mp->b_datap->db_type == M_DATA);
14543
14544 if (fp_mp &&
14545 (ill->ill_capabilities & ILL_CAPAB_DLD_DIRECT)) {
14546 ill_dld_direct_t *idd;
14547
14548 idd = &ill->ill_dld_capab->idc_direct;
14549 /*
14550 * Send the packet directly to DLD, where it
14551 * may be queued depending on the availability
14552 * of transmit resources at the media layer.
14553 * Return value should be taken into
14554 * account and flow control the TCP.
14555 */
14556 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCOutTransmits);
14557 UPDATE_MIB(ill->ill_ip_mib, ipIfStatsHCOutOctets,
14558 pkt_len);
14559
14560 if (ixaflags & IXAF_NO_DEV_FLOW_CTL) {
14561 (void) idd->idd_tx_df(idd->idd_tx_dh, mp,
14562 (uintptr_t)xmit_hint, IP_DROP_ON_NO_DESC);
14563 } else {
14564 uintptr_t cookie;
14565
14566 if ((cookie = idd->idd_tx_df(idd->idd_tx_dh,
14567 mp, (uintptr_t)xmit_hint, 0)) != 0) {
14568 if (ixacookie != NULL)
14569 *ixacookie = cookie;
14570 return (EWOULDBLOCK);
14571 }
14572 }
14573 } else {
14574 wq = ill->ill_wq;
14575
14576 if (!(ixaflags & IXAF_NO_DEV_FLOW_CTL) &&
14577 !canputnext(wq)) {
14578 if (ixacookie != NULL)
14579 *ixacookie = 0;
14580 ip_xmit_flowctl_drop(ill, mp, fp_mp,
14581 nce->nce_fp_mp != NULL ?
14582 MBLKL(nce->nce_fp_mp) : 0);
14583 return (EWOULDBLOCK);
14584 }
14585 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCOutTransmits);
14586 UPDATE_MIB(ill->ill_ip_mib, ipIfStatsHCOutOctets,
14587 pkt_len);
14588 putnext(wq, mp);
14589 }
14590
14591 /*
14592 * The rest of this function implements Neighbor Unreachability
14593 * detection. Determine if the ncec is eligible for NUD.
14594 */
14595 if (ncec->ncec_flags & NCE_F_NONUD)
14596 return (0);
14597
14598 ASSERT(ncec->ncec_state != ND_INCOMPLETE);
14599
14600 /*
14601 * Check for upper layer advice
14602 */
14603 if (ixaflags & IXAF_REACH_CONF) {
14604 timeout_id_t tid;
14605
14606 /*
14607 * It should be o.k. to check the state without
14608 * a lock here, at most we lose an advice.
14609 */
14610 ncec->ncec_last = TICK_TO_MSEC(now);
14611 if (ncec->ncec_state != ND_REACHABLE) {
14612 mutex_enter(&ncec->ncec_lock);
14613 ncec->ncec_state = ND_REACHABLE;
14614 tid = ncec->ncec_timeout_id;
14615 ncec->ncec_timeout_id = 0;
14616 mutex_exit(&ncec->ncec_lock);
14617 (void) untimeout(tid);
14618 if (ip_debug > 2) {
14619 /* ip1dbg */
14620 pr_addr_dbg("ip_xmit: state"
14621 " for %s changed to"
14622 " REACHABLE\n", AF_INET6,
14623 &ncec->ncec_addr);
14624 }
14625 }
14626 return (0);
14627 }
14628
14629 delta = TICK_TO_MSEC(now) - ncec->ncec_last;
14630 ip1dbg(("ip_xmit: delta = %" PRId64
14631 " ill_reachable_time = %d \n", delta,
14632 ill->ill_reachable_time));
14633 if (delta > (uint64_t)ill->ill_reachable_time) {
14634 mutex_enter(&ncec->ncec_lock);
14635 switch (ncec->ncec_state) {
14636 case ND_REACHABLE:
14637 ASSERT((ncec->ncec_flags & NCE_F_NONUD) == 0);
14638 /* FALLTHROUGH */
14639 case ND_STALE:
14640 /*
14641 * ND_REACHABLE is identical to
14642 * ND_STALE in this specific case. If
14643 * reachable time has expired for this
14644 * neighbor (delta is greater than
14645 * reachable time), conceptually, the
14646 * neighbor cache is no longer in
14647 * REACHABLE state, but already in
14648 * STALE state. So the correct
14649 * transition here is to ND_DELAY.
14650 */
14651 ncec->ncec_state = ND_DELAY;
14652 mutex_exit(&ncec->ncec_lock);
14653 nce_restart_timer(ncec,
14654 ipst->ips_delay_first_probe_time);
14655 if (ip_debug > 3) {
14656 /* ip2dbg */
14657 pr_addr_dbg("ip_xmit: state"
14658 " for %s changed to"
14659 " DELAY\n", AF_INET6,
14660 &ncec->ncec_addr);
14661 }
14662 break;
14663 case ND_DELAY:
14664 case ND_PROBE:
14665 mutex_exit(&ncec->ncec_lock);
14666 /* Timers have already started */
14667 break;
14668 case ND_UNREACHABLE:
14669 /*
14670 * nce_timer has detected that this ncec
14671 * is unreachable and initiated deleting
14672 * this ncec.
14673 * This is a harmless race where we found the
14674 * ncec before it was deleted and have
14675 * just sent out a packet using this
14676 * unreachable ncec.
14677 */
14678 mutex_exit(&ncec->ncec_lock);
14679 break;
14680 default:
14681 ASSERT(0);
14682 mutex_exit(&ncec->ncec_lock);
14683 }
14684 }
14685 return (0);
14686
14687 case ND_INCOMPLETE:
14688 /*
14689 * the state could have changed since we didn't hold the lock.
14690 * Re-verify state under lock.
14691 */
14692 is_probe = ipmp_packet_is_probe(mp, nce->nce_ill);
14693 mutex_enter(&ncec->ncec_lock);
14694 if (NCE_ISREACHABLE(ncec)) {
14695 mutex_exit(&ncec->ncec_lock);
14696 goto sendit;
14697 }
14698 /* queue the packet */
14699 nce_queue_mp(ncec, mp, is_probe);
14700 mutex_exit(&ncec->ncec_lock);
14701 DTRACE_PROBE2(ip__xmit__incomplete,
14702 (ncec_t *), ncec, (mblk_t *), mp);
14703 return (0);
14704
14705 case ND_INITIAL:
14706 /*
14707 * State could have changed since we didn't hold the lock, so
14708 * re-verify state.
14709 */
14710 is_probe = ipmp_packet_is_probe(mp, nce->nce_ill);
14711 mutex_enter(&ncec->ncec_lock);
14712 if (NCE_ISREACHABLE(ncec)) {
14713 mutex_exit(&ncec->ncec_lock);
14714 goto sendit;
14715 }
14716 nce_queue_mp(ncec, mp, is_probe);
14717 if (ncec->ncec_state == ND_INITIAL) {
14718 ncec->ncec_state = ND_INCOMPLETE;
14719 mutex_exit(&ncec->ncec_lock);
14720 /*
14721 * figure out the source we want to use
14722 * and resolve it.
14723 */
14724 ip_ndp_resolve(ncec);
14725 } else {
14726 mutex_exit(&ncec->ncec_lock);
14727 }
14728 return (0);
14729
14730 case ND_UNREACHABLE:
14731 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
14732 ip_drop_output("ipIfStatsOutDiscards - ND_UNREACHABLE",
14733 mp, ill);
14734 freemsg(mp);
14735 return (0);
14736
14737 default:
14738 ASSERT(0);
14739 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
14740 ip_drop_output("ipIfStatsOutDiscards - ND_other",
14741 mp, ill);
14742 freemsg(mp);
14743 return (ENETUNREACH);
14744 }
14745 }
14746
14747 /*
14748 * Return B_TRUE if the buffers differ in length or content.
14749 * This is used for comparing extension header buffers.
14750 * Note that an extension header would be declared different
14751 * even if all that changed was the next header value in that header i.e.
14752 * what really changed is the next extension header.
14753 */
14754 boolean_t
14755 ip_cmpbuf(const void *abuf, uint_t alen, boolean_t b_valid, const void *bbuf,
14756 uint_t blen)
14757 {
14758 if (!b_valid)
14759 blen = 0;
14760
14761 if (alen != blen)
14762 return (B_TRUE);
14763 if (alen == 0)
14764 return (B_FALSE); /* Both zero length */
14765 return (bcmp(abuf, bbuf, alen));
14766 }
14767
14768 /*
14769 * Preallocate memory for ip_savebuf(). Returns B_TRUE if ok.
14770 * Return B_FALSE if memory allocation fails - don't change any state!
14771 */
14772 boolean_t
14773 ip_allocbuf(void **dstp, uint_t *dstlenp, boolean_t src_valid,
14774 const void *src, uint_t srclen)
14775 {
14776 void *dst;
14777
14778 if (!src_valid)
14779 srclen = 0;
14780
14781 ASSERT(*dstlenp == 0);
14782 if (src != NULL && srclen != 0) {
14783 dst = mi_alloc(srclen, BPRI_MED);
14784 if (dst == NULL)
14785 return (B_FALSE);
14786 } else {
14787 dst = NULL;
14788 }
14789 if (*dstp != NULL)
14790 mi_free(*dstp);
14791 *dstp = dst;
14792 *dstlenp = dst == NULL ? 0 : srclen;
14793 return (B_TRUE);
14794 }
14795
14796 /*
14797 * Replace what is in *dst, *dstlen with the source.
14798 * Assumes ip_allocbuf has already been called.
14799 */
14800 void
14801 ip_savebuf(void **dstp, uint_t *dstlenp, boolean_t src_valid,
14802 const void *src, uint_t srclen)
14803 {
14804 if (!src_valid)
14805 srclen = 0;
14806
14807 ASSERT(*dstlenp == srclen);
14808 if (src != NULL && srclen != 0)
14809 bcopy(src, *dstp, srclen);
14810 }
14811
14812 /*
14813 * Free the storage pointed to by the members of an ip_pkt_t.
14814 */
14815 void
14816 ip_pkt_free(ip_pkt_t *ipp)
14817 {
14818 uint_t fields = ipp->ipp_fields;
14819
14820 if (fields & IPPF_HOPOPTS) {
14821 kmem_free(ipp->ipp_hopopts, ipp->ipp_hopoptslen);
14822 ipp->ipp_hopopts = NULL;
14823 ipp->ipp_hopoptslen = 0;
14824 }
14825 if (fields & IPPF_RTHDRDSTOPTS) {
14826 kmem_free(ipp->ipp_rthdrdstopts, ipp->ipp_rthdrdstoptslen);
14827 ipp->ipp_rthdrdstopts = NULL;
14828 ipp->ipp_rthdrdstoptslen = 0;
14829 }
14830 if (fields & IPPF_DSTOPTS) {
14831 kmem_free(ipp->ipp_dstopts, ipp->ipp_dstoptslen);
14832 ipp->ipp_dstopts = NULL;
14833 ipp->ipp_dstoptslen = 0;
14834 }
14835 if (fields & IPPF_RTHDR) {
14836 kmem_free(ipp->ipp_rthdr, ipp->ipp_rthdrlen);
14837 ipp->ipp_rthdr = NULL;
14838 ipp->ipp_rthdrlen = 0;
14839 }
14840 if (fields & IPPF_IPV4_OPTIONS) {
14841 kmem_free(ipp->ipp_ipv4_options, ipp->ipp_ipv4_options_len);
14842 ipp->ipp_ipv4_options = NULL;
14843 ipp->ipp_ipv4_options_len = 0;
14844 }
14845 if (fields & IPPF_LABEL_V4) {
14846 kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4);
14847 ipp->ipp_label_v4 = NULL;
14848 ipp->ipp_label_len_v4 = 0;
14849 }
14850 if (fields & IPPF_LABEL_V6) {
14851 kmem_free(ipp->ipp_label_v6, ipp->ipp_label_len_v6);
14852 ipp->ipp_label_v6 = NULL;
14853 ipp->ipp_label_len_v6 = 0;
14854 }
14855 ipp->ipp_fields &= ~(IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS |
14856 IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6);
14857 }
14858
14859 /*
14860 * Copy from src to dst and allocate as needed.
14861 * Returns zero or ENOMEM.
14862 *
14863 * The caller must initialize dst to zero.
14864 */
14865 int
14866 ip_pkt_copy(ip_pkt_t *src, ip_pkt_t *dst, int kmflag)
14867 {
14868 uint_t fields = src->ipp_fields;
14869
14870 /* Start with fields that don't require memory allocation */
14871 dst->ipp_fields = fields &
14872 ~(IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS |
14873 IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6);
14874
14875 dst->ipp_addr = src->ipp_addr;
14876 dst->ipp_unicast_hops = src->ipp_unicast_hops;
14877 dst->ipp_hoplimit = src->ipp_hoplimit;
14878 dst->ipp_tclass = src->ipp_tclass;
14879 dst->ipp_type_of_service = src->ipp_type_of_service;
14880
14881 if (!(fields & (IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS |
14882 IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6)))
14883 return (0);
14884
14885 if (fields & IPPF_HOPOPTS) {
14886 dst->ipp_hopopts = kmem_alloc(src->ipp_hopoptslen, kmflag);
14887 if (dst->ipp_hopopts == NULL) {
14888 ip_pkt_free(dst);
14889 return (ENOMEM);
14890 }
14891 dst->ipp_fields |= IPPF_HOPOPTS;
14892 bcopy(src->ipp_hopopts, dst->ipp_hopopts,
14893 src->ipp_hopoptslen);
14894 dst->ipp_hopoptslen = src->ipp_hopoptslen;
14895 }
14896 if (fields & IPPF_RTHDRDSTOPTS) {
14897 dst->ipp_rthdrdstopts = kmem_alloc(src->ipp_rthdrdstoptslen,
14898 kmflag);
14899 if (dst->ipp_rthdrdstopts == NULL) {
14900 ip_pkt_free(dst);
14901 return (ENOMEM);
14902 }
14903 dst->ipp_fields |= IPPF_RTHDRDSTOPTS;
14904 bcopy(src->ipp_rthdrdstopts, dst->ipp_rthdrdstopts,
14905 src->ipp_rthdrdstoptslen);
14906 dst->ipp_rthdrdstoptslen = src->ipp_rthdrdstoptslen;
14907 }
14908 if (fields & IPPF_DSTOPTS) {
14909 dst->ipp_dstopts = kmem_alloc(src->ipp_dstoptslen, kmflag);
14910 if (dst->ipp_dstopts == NULL) {
14911 ip_pkt_free(dst);
14912 return (ENOMEM);
14913 }
14914 dst->ipp_fields |= IPPF_DSTOPTS;
14915 bcopy(src->ipp_dstopts, dst->ipp_dstopts,
14916 src->ipp_dstoptslen);
14917 dst->ipp_dstoptslen = src->ipp_dstoptslen;
14918 }
14919 if (fields & IPPF_RTHDR) {
14920 dst->ipp_rthdr = kmem_alloc(src->ipp_rthdrlen, kmflag);
14921 if (dst->ipp_rthdr == NULL) {
14922 ip_pkt_free(dst);
14923 return (ENOMEM);
14924 }
14925 dst->ipp_fields |= IPPF_RTHDR;
14926 bcopy(src->ipp_rthdr, dst->ipp_rthdr,
14927 src->ipp_rthdrlen);
14928 dst->ipp_rthdrlen = src->ipp_rthdrlen;
14929 }
14930 if (fields & IPPF_IPV4_OPTIONS) {
14931 dst->ipp_ipv4_options = kmem_alloc(src->ipp_ipv4_options_len,
14932 kmflag);
14933 if (dst->ipp_ipv4_options == NULL) {
14934 ip_pkt_free(dst);
14935 return (ENOMEM);
14936 }
14937 dst->ipp_fields |= IPPF_IPV4_OPTIONS;
14938 bcopy(src->ipp_ipv4_options, dst->ipp_ipv4_options,
14939 src->ipp_ipv4_options_len);
14940 dst->ipp_ipv4_options_len = src->ipp_ipv4_options_len;
14941 }
14942 if (fields & IPPF_LABEL_V4) {
14943 dst->ipp_label_v4 = kmem_alloc(src->ipp_label_len_v4, kmflag);
14944 if (dst->ipp_label_v4 == NULL) {
14945 ip_pkt_free(dst);
14946 return (ENOMEM);
14947 }
14948 dst->ipp_fields |= IPPF_LABEL_V4;
14949 bcopy(src->ipp_label_v4, dst->ipp_label_v4,
14950 src->ipp_label_len_v4);
14951 dst->ipp_label_len_v4 = src->ipp_label_len_v4;
14952 }
14953 if (fields & IPPF_LABEL_V6) {
14954 dst->ipp_label_v6 = kmem_alloc(src->ipp_label_len_v6, kmflag);
14955 if (dst->ipp_label_v6 == NULL) {
14956 ip_pkt_free(dst);
14957 return (ENOMEM);
14958 }
14959 dst->ipp_fields |= IPPF_LABEL_V6;
14960 bcopy(src->ipp_label_v6, dst->ipp_label_v6,
14961 src->ipp_label_len_v6);
14962 dst->ipp_label_len_v6 = src->ipp_label_len_v6;
14963 }
14964 if (fields & IPPF_FRAGHDR) {
14965 dst->ipp_fraghdr = kmem_alloc(src->ipp_fraghdrlen, kmflag);
14966 if (dst->ipp_fraghdr == NULL) {
14967 ip_pkt_free(dst);
14968 return (ENOMEM);
14969 }
14970 dst->ipp_fields |= IPPF_FRAGHDR;
14971 bcopy(src->ipp_fraghdr, dst->ipp_fraghdr,
14972 src->ipp_fraghdrlen);
14973 dst->ipp_fraghdrlen = src->ipp_fraghdrlen;
14974 }
14975 return (0);
14976 }
14977
14978 /*
14979 * Returns INADDR_ANY if no source route
14980 */
14981 ipaddr_t
14982 ip_pkt_source_route_v4(const ip_pkt_t *ipp)
14983 {
14984 ipaddr_t nexthop = INADDR_ANY;
14985 ipoptp_t opts;
14986 uchar_t *opt;
14987 uint8_t optval;
14988 uint8_t optlen;
14989 uint32_t totallen;
14990
14991 if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS))
14992 return (INADDR_ANY);
14993
14994 totallen = ipp->ipp_ipv4_options_len;
14995 if (totallen & 0x3)
14996 return (INADDR_ANY);
14997
14998 for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options);
14999 optval != IPOPT_EOL;
15000 optval = ipoptp_next(&opts)) {
15001 opt = opts.ipoptp_cur;
15002 switch (optval) {
15003 uint8_t off;
15004 case IPOPT_SSRR:
15005 case IPOPT_LSRR:
15006 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
15007 break;
15008 }
15009 optlen = opts.ipoptp_len;
15010 off = opt[IPOPT_OFFSET];
15011 off--;
15012 if (optlen < IP_ADDR_LEN ||
15013 off > optlen - IP_ADDR_LEN) {
15014 /* End of source route */
15015 break;
15016 }
15017 bcopy((char *)opt + off, &nexthop, IP_ADDR_LEN);
15018 if (nexthop == htonl(INADDR_LOOPBACK)) {
15019 /* Ignore */
15020 nexthop = INADDR_ANY;
15021 break;
15022 }
15023 break;
15024 }
15025 }
15026 return (nexthop);
15027 }
15028
15029 /*
15030 * Reverse a source route.
15031 */
15032 void
15033 ip_pkt_source_route_reverse_v4(ip_pkt_t *ipp)
15034 {
15035 ipaddr_t tmp;
15036 ipoptp_t opts;
15037 uchar_t *opt;
15038 uint8_t optval;
15039 uint32_t totallen;
15040
15041 if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS))
15042 return;
15043
15044 totallen = ipp->ipp_ipv4_options_len;
15045 if (totallen & 0x3)
15046 return;
15047
15048 for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options);
15049 optval != IPOPT_EOL;
15050 optval = ipoptp_next(&opts)) {
15051 uint8_t off1, off2;
15052
15053 opt = opts.ipoptp_cur;
15054 switch (optval) {
15055 case IPOPT_SSRR:
15056 case IPOPT_LSRR:
15057 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
15058 break;
15059 }
15060 off1 = IPOPT_MINOFF_SR - 1;
15061 off2 = opt[IPOPT_OFFSET] - IP_ADDR_LEN - 1;
15062 while (off2 > off1) {
15063 bcopy(opt + off2, &tmp, IP_ADDR_LEN);
15064 bcopy(opt + off1, opt + off2, IP_ADDR_LEN);
15065 bcopy(&tmp, opt + off2, IP_ADDR_LEN);
15066 off2 -= IP_ADDR_LEN;
15067 off1 += IP_ADDR_LEN;
15068 }
15069 opt[IPOPT_OFFSET] = IPOPT_MINOFF_SR;
15070 break;
15071 }
15072 }
15073 }
15074
15075 /*
15076 * Returns NULL if no routing header
15077 */
15078 in6_addr_t *
15079 ip_pkt_source_route_v6(const ip_pkt_t *ipp)
15080 {
15081 in6_addr_t *nexthop = NULL;
15082 ip6_rthdr0_t *rthdr;
15083
15084 if (!(ipp->ipp_fields & IPPF_RTHDR))
15085 return (NULL);
15086
15087 rthdr = (ip6_rthdr0_t *)ipp->ipp_rthdr;
15088 if (rthdr->ip6r0_segleft == 0)
15089 return (NULL);
15090
15091 nexthop = (in6_addr_t *)((char *)rthdr + sizeof (*rthdr));
15092 return (nexthop);
15093 }
15094
15095 zoneid_t
15096 ip_get_zoneid_v4(ipaddr_t addr, mblk_t *mp, ip_recv_attr_t *ira,
15097 zoneid_t lookup_zoneid)
15098 {
15099 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
15100 ire_t *ire;
15101 int ire_flags = MATCH_IRE_TYPE;
15102 zoneid_t zoneid = ALL_ZONES;
15103
15104 if (is_system_labeled() && !tsol_can_accept_raw(mp, ira, B_FALSE))
15105 return (ALL_ZONES);
15106
15107 if (lookup_zoneid != ALL_ZONES)
15108 ire_flags |= MATCH_IRE_ZONEONLY;
15109 ire = ire_ftable_lookup_v4(addr, NULL, NULL, IRE_LOCAL | IRE_LOOPBACK,
15110 NULL, lookup_zoneid, NULL, ire_flags, 0, ipst, NULL);
15111 if (ire != NULL) {
15112 zoneid = IP_REAL_ZONEID(ire->ire_zoneid, ipst);
15113 ire_refrele(ire);
15114 }
15115 return (zoneid);
15116 }
15117
15118 zoneid_t
15119 ip_get_zoneid_v6(in6_addr_t *addr, mblk_t *mp, const ill_t *ill,
15120 ip_recv_attr_t *ira, zoneid_t lookup_zoneid)
15121 {
15122 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
15123 ire_t *ire;
15124 int ire_flags = MATCH_IRE_TYPE;
15125 zoneid_t zoneid = ALL_ZONES;
15126
15127 if (is_system_labeled() && !tsol_can_accept_raw(mp, ira, B_FALSE))
15128 return (ALL_ZONES);
15129
15130 if (IN6_IS_ADDR_LINKLOCAL(addr))
15131 ire_flags |= MATCH_IRE_ILL;
15132
15133 if (lookup_zoneid != ALL_ZONES)
15134 ire_flags |= MATCH_IRE_ZONEONLY;
15135 ire = ire_ftable_lookup_v6(addr, NULL, NULL, IRE_LOCAL | IRE_LOOPBACK,
15136 ill, lookup_zoneid, NULL, ire_flags, 0, ipst, NULL);
15137 if (ire != NULL) {
15138 zoneid = IP_REAL_ZONEID(ire->ire_zoneid, ipst);
15139 ire_refrele(ire);
15140 }
15141 return (zoneid);
15142 }
15143
15144 /*
15145 * IP obserability hook support functions.
15146 */
15147 static void
15148 ipobs_init(ip_stack_t *ipst)
15149 {
15150 netid_t id;
15151
15152 id = net_getnetidbynetstackid(ipst->ips_netstack->netstack_stackid);
15153
15154 ipst->ips_ip4_observe_pr = net_protocol_lookup(id, NHF_INET);
15155 VERIFY(ipst->ips_ip4_observe_pr != NULL);
15156
15157 ipst->ips_ip6_observe_pr = net_protocol_lookup(id, NHF_INET6);
15158 VERIFY(ipst->ips_ip6_observe_pr != NULL);
15159 }
15160
15161 static void
15162 ipobs_fini(ip_stack_t *ipst)
15163 {
15164
15165 VERIFY(net_protocol_release(ipst->ips_ip4_observe_pr) == 0);
15166 VERIFY(net_protocol_release(ipst->ips_ip6_observe_pr) == 0);
15167 }
15168
15169 /*
15170 * hook_pkt_observe_t is composed in network byte order so that the
15171 * entire mblk_t chain handed into hook_run can be used as-is.
15172 * The caveat is that use of the fields, such as the zone fields,
15173 * requires conversion into host byte order first.
15174 */
15175 void
15176 ipobs_hook(mblk_t *mp, int htype, zoneid_t zsrc, zoneid_t zdst,
15177 const ill_t *ill, ip_stack_t *ipst)
15178 {
15179 hook_pkt_observe_t *hdr;
15180 uint64_t grifindex;
15181 mblk_t *imp;
15182
15183 imp = allocb(sizeof (*hdr), BPRI_HI);
15184 if (imp == NULL)
15185 return;
15186
15187 hdr = (hook_pkt_observe_t *)imp->b_rptr;
15188 /*
15189 * b_wptr is set to make the apparent size of the data in the mblk_t
15190 * to exclude the pointers at the end of hook_pkt_observer_t.
15191 */
15192 imp->b_wptr = imp->b_rptr + sizeof (dl_ipnetinfo_t);
15193 imp->b_cont = mp;
15194
15195 ASSERT(DB_TYPE(mp) == M_DATA);
15196
15197 if (IS_UNDER_IPMP(ill))
15198 grifindex = ipmp_ill_get_ipmp_ifindex(ill);
15199 else
15200 grifindex = 0;
15201
15202 hdr->hpo_version = 1;
15203 hdr->hpo_htype = htons(htype);
15204 hdr->hpo_pktlen = htonl((ulong_t)msgdsize(mp));
15205 hdr->hpo_ifindex = htonl(ill->ill_phyint->phyint_ifindex);
15206 hdr->hpo_grifindex = htonl(grifindex);
15207 hdr->hpo_zsrc = htonl(zsrc);
15208 hdr->hpo_zdst = htonl(zdst);
15209 hdr->hpo_pkt = imp;
15210 hdr->hpo_ctx = ipst->ips_netstack;
15211
15212 if (ill->ill_isv6) {
15213 hdr->hpo_family = AF_INET6;
15214 (void) hook_run(ipst->ips_ipv6_net_data->netd_hooks,
15215 ipst->ips_ipv6observing, (hook_data_t)hdr);
15216 } else {
15217 hdr->hpo_family = AF_INET;
15218 (void) hook_run(ipst->ips_ipv4_net_data->netd_hooks,
15219 ipst->ips_ipv4observing, (hook_data_t)hdr);
15220 }
15221
15222 imp->b_cont = NULL;
15223 freemsg(imp);
15224 }
15225
15226 /*
15227 * Utility routine that checks if `v4srcp' is a valid address on underlying
15228 * interface `ill'. If `ipifp' is non-NULL, it's set to a held ipif
15229 * associated with `v4srcp' on success. NOTE: if this is not called from
15230 * inside the IPSQ (ill_g_lock is not held), `ill' may be removed from the
15231 * group during or after this lookup.
15232 */
15233 boolean_t
15234 ipif_lookup_testaddr_v4(ill_t *ill, const in_addr_t *v4srcp, ipif_t **ipifp)
15235 {
15236 ipif_t *ipif;
15237
15238 ipif = ipif_lookup_addr_exact(*v4srcp, ill, ill->ill_ipst);
15239 if (ipif != NULL) {
15240 if (ipifp != NULL)
15241 *ipifp = ipif;
15242 else
15243 ipif_refrele(ipif);
15244 return (B_TRUE);
15245 }
15246
15247 ip1dbg(("ipif_lookup_testaddr_v4: cannot find ipif for src %x\n",
15248 *v4srcp));
15249 return (B_FALSE);
15250 }
15251
15252 /*
15253 * Transport protocol call back function for CPU state change.
15254 */
15255 /* ARGSUSED */
15256 static int
15257 ip_tp_cpu_update(cpu_setup_t what, int id, void *arg)
15258 {
15259 processorid_t cpu_seqid;
15260 netstack_handle_t nh;
15261 netstack_t *ns;
15262
15263 ASSERT(MUTEX_HELD(&cpu_lock));
15264
15265 switch (what) {
15266 case CPU_CONFIG:
15267 case CPU_ON:
15268 case CPU_INIT:
15269 case CPU_CPUPART_IN:
15270 cpu_seqid = cpu[id]->cpu_seqid;
15271 netstack_next_init(&nh);
15272 while ((ns = netstack_next(&nh)) != NULL) {
15273 tcp_stack_cpu_add(ns->netstack_tcp, cpu_seqid);
15274 sctp_stack_cpu_add(ns->netstack_sctp, cpu_seqid);
15275 udp_stack_cpu_add(ns->netstack_udp, cpu_seqid);
15276 netstack_rele(ns);
15277 }
15278 netstack_next_fini(&nh);
15279 break;
15280 case CPU_UNCONFIG:
15281 case CPU_OFF:
15282 case CPU_CPUPART_OUT:
15283 /*
15284 * Nothing to do. We don't remove the per CPU stats from
15285 * the IP stack even when the CPU goes offline.
15286 */
15287 break;
15288 default:
15289 break;
15290 }
15291 return (0);
15292 }