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 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2011, Joyent Inc. All rights reserved.
24 * Copyright (c) 2013, OmniTI Computer Consulting, Inc. All rights reserved.
25 */
26
27 #ifndef _INET_TCP_IMPL_H
28 #define _INET_TCP_IMPL_H
29
30 /*
31 * TCP implementation private declarations. These interfaces are
32 * used to build the IP module and are not meant to be accessed
33 * by any modules except IP itself. They are undocumented and are
34 * subject to change without notice.
35 */
36
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40
41 #ifdef _KERNEL
42
43 #include <sys/cpuvar.h>
44 #include <sys/clock_impl.h> /* For LBOLT_FASTPATH{,64} */
45 #include <inet/optcom.h>
46 #include <inet/tcp.h>
47 #include <inet/tunables.h>
48
49 #define TCP_MOD_ID 5105
50
51 extern struct qinit tcp_sock_winit;
52 extern struct qinit tcp_winit;
53
54 extern sock_downcalls_t sock_tcp_downcalls;
55
56 /*
57 * Bind hash list size and has function. It has to be a power of 2 for
58 * hashing.
59 */
60 #define TCP_BIND_FANOUT_SIZE 1024
61 #define TCP_BIND_HASH(lport) (ntohs(lport) & (TCP_BIND_FANOUT_SIZE - 1))
62
63 /*
64 * This implementation follows the 4.3BSD interpretation of the urgent
65 * pointer and not RFC 1122. Switching to RFC 1122 behavior would cause
66 * incompatible changes in protocols like telnet and rlogin.
67 */
68 #define TCP_OLD_URP_INTERPRETATION 1
69
70 /* TCP option length */
71 #define TCPOPT_NOP_LEN 1
72 #define TCPOPT_MAXSEG_LEN 4
73 #define TCPOPT_WS_LEN 3
74 #define TCPOPT_REAL_WS_LEN (TCPOPT_WS_LEN+1)
75 #define TCPOPT_TSTAMP_LEN 10
76 #define TCPOPT_REAL_TS_LEN (TCPOPT_TSTAMP_LEN+2)
77 #define TCPOPT_SACK_OK_LEN 2
78 #define TCPOPT_REAL_SACK_OK_LEN (TCPOPT_SACK_OK_LEN+2)
79 #define TCPOPT_REAL_SACK_LEN 4
80 #define TCPOPT_MAX_SACK_LEN 36
81 #define TCPOPT_HEADER_LEN 2
82
83 /* Round up the value to the nearest mss. */
84 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss))
85
86 /*
87 * Was this tcp created via socket() interface?
88 */
89 #define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket)
90
91 /*
92 * Is this tcp not attached to any upper client?
93 */
94 #define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached)
95
96 /* TCP timers related data strucutres. Refer to tcp_timers.c. */
97 typedef struct tcp_timer_s {
98 conn_t *connp;
99 void (*tcpt_proc)(void *);
100 callout_id_t tcpt_tid;
101 } tcp_timer_t;
102
103 extern kmem_cache_t *tcp_timercache;
104
105 /*
106 * Macro for starting various timers. Retransmission timer has its own macro,
107 * TCP_TIMER_RESTART(). tim is in millisec.
108 */
109 #define TCP_TIMER(tcp, f, tim) \
110 tcp_timeout(tcp->tcp_connp, f, tim)
111 #define TCP_TIMER_CANCEL(tcp, id) \
112 tcp_timeout_cancel(tcp->tcp_connp, id)
113
114 /*
115 * To restart the TCP retransmission timer. intvl is in millisec.
116 */
117 #define TCP_TIMER_RESTART(tcp, intvl) { \
118 if ((tcp)->tcp_timer_tid != 0) \
119 (void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \
120 (tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, (intvl)); \
121 }
122
123 /*
124 * For scalability, we must not run a timer for every TCP connection
125 * in TIME_WAIT state. To see why, consider (for time wait interval of
126 * 1 minutes):
127 * 10,000 connections/sec * 60 seconds/time wait = 600,000 active conn's
128 *
129 * This list is ordered by time, so you need only delete from the head
130 * until you get to entries which aren't old enough to delete yet.
131 * The list consists of only the detached TIME_WAIT connections.
132 *
133 * When a tcp_t enters TIME_WAIT state, a timer is started (timeout is
134 * tcps_time_wait_interval). When the tcp_t is detached (upper layer closes
135 * the end point), it is moved to the time wait list and another timer is
136 * started (expiry time is set at tcp_time_wait_expire, which is
137 * also calculated using tcps_time_wait_interval). This means that the
138 * TIME_WAIT state can be extended (up to doubled) if the tcp_t doesn't
139 * become detached for a long time.
140 *
141 * The list manipulations (including tcp_time_wait_next/prev)
142 * are protected by the tcp_time_wait_lock. The content of the
143 * detached TIME_WAIT connections is protected by the normal perimeters.
144 *
145 * This list is per squeue and squeues are shared across the tcp_stack_t's.
146 * Things on tcp_time_wait_head remain associated with the tcp_stack_t
147 * and conn_netstack.
148 * The tcp_t's that are added to tcp_free_list are disassociated and
149 * have NULL tcp_tcps and conn_netstack pointers.
150 */
151 typedef struct tcp_squeue_priv_s {
152 kmutex_t tcp_time_wait_lock;
153 callout_id_t tcp_time_wait_tid;
154 tcp_t *tcp_time_wait_head;
155 tcp_t *tcp_time_wait_tail;
156 tcp_t *tcp_free_list;
157 uint_t tcp_free_list_cnt;
158 #ifdef DEBUG
159 /*
160 * For debugging purpose, true when tcp_time_wait_collector() is
161 * running.
162 */
163 boolean_t tcp_time_wait_running;
164 #endif
165 } tcp_squeue_priv_t;
166
167 /*
168 * Parameters for TCP Initial Send Sequence number (ISS) generation. When
169 * tcp_strong_iss is set to 1, which is the default, the ISS is calculated
170 * by adding three components: a time component which grows by 1 every 4096
171 * nanoseconds (versus every 4 microseconds suggested by RFC 793, page 27);
172 * a per-connection component which grows by 125000 for every new connection;
173 * and an "extra" component that grows by a random amount centered
174 * approximately on 64000. This causes the ISS generator to cycle every
175 * 4.89 hours if no TCP connections are made, and faster if connections are
176 * made.
177 *
178 * When tcp_strong_iss is set to 0, ISS is calculated by adding two
179 * components: a time component which grows by 250000 every second; and
180 * a per-connection component which grows by 125000 for every new connections.
181 *
182 * A third method, when tcp_strong_iss is set to 2, for generating ISS is
183 * prescribed by Steve Bellovin. This involves adding time, the 125000 per
184 * connection, and a one-way hash (MD5) of the connection ID <sport, dport,
185 * src, dst>, a "truly" random (per RFC 1750) number, and a console-entered
186 * password.
187 */
188 #define ISS_INCR 250000
189 #define ISS_NSEC_SHT 12
190
191 /* Macros for timestamp comparisons */
192 #define TSTMP_GEQ(a, b) ((int32_t)((a)-(b)) >= 0)
193 #define TSTMP_LT(a, b) ((int32_t)((a)-(b)) < 0)
194
195 /*
196 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is
197 * either tcp_slow_start_initial or tcp_slow_start_after idle
198 * depending on the caller. If the upper layer has not used the
199 * TCP_INIT_CWND option to change the initial cwnd, tcp_init_cwnd
200 * should be 0 and we use the formula in RFC 3390 to set tcp_cwnd.
201 * If the upper layer has changed set the tcp_init_cwnd, just use
202 * it to calculate the tcp_cwnd.
203 *
204 * "An Argument for Increasing TCP's Initial Congestion Window"
205 * ACM SIGCOMM Computer Communications Review, vol. 40 (2010), pp. 27-33
206 * -- Nandita Dukkipati, Tiziana Refice, Yuchung Cheng,
207 * Hsiao-keng Jerry Chu, Tom Herbert, Amit Agarwal,
208 * Arvind Jain, Natalia Sutin
209 *
210 * "Based on the results from our experiments, we believe the
211 * initial congestion window should be at least ten segments
212 * and the same be investigated for standardization by the IETF."
213 *
214 * As such, the def_max_init_cwnd argument with which this macro is
215 * invoked is either the tcps_slow_start_initial or
216 * tcps_slow_start_after_idle which both default to 0 and will respect
217 * RFC 3390 exactly. If the tunables are explicitly set by the operator,
218 * then the initial congestion window should be set as the operator
219 * demands, within reason. We shall arbitrarily define reason as a
220 * maximum of 16 (same as used by the TCP_INIT_CWND setsockopt).
221 */
222
223 /* Maximum TCP initial cwin (start/restart). */
224 #define TCP_MAX_INIT_CWND 16
225
226 #define TCP_SET_INIT_CWND(tcp, mss, def_max_init_cwnd) \
227 { \
228 if ((tcp)->tcp_init_cwnd == 0) { \
229 if (def_max_init_cwnd == 0) { \
230 (tcp)->tcp_cwnd = MIN(4 * (mss), \
231 MAX(2 * (mss), 4380 / (mss) * (mss))); \
232 } else { \
233 (tcp)->tcp_cwnd = MIN(TCP_MAX_INIT_CWND * (mss),\
234 def_max_init_cwnd * (mss)); \
235 } \
236 } else { \
237 (tcp)->tcp_cwnd = (tcp)->tcp_init_cwnd * (mss); \
238 } \
239 tcp->tcp_cwnd_cnt = 0; \
240 }
241
242 /*
243 * Set ECN capable transport (ECT) code point in IP header.
244 *
245 * Note that there are 2 ECT code points '01' and '10', which are called
246 * ECT(1) and ECT(0) respectively. Here we follow the original ECT code
247 * point ECT(0) for TCP as described in RFC 2481.
248 */
249 #define TCP_SET_ECT(tcp, iph) \
250 if ((tcp)->tcp_connp->conn_ipversion == IPV4_VERSION) { \
251 /* We need to clear the code point first. */ \
252 ((ipha_t *)(iph))->ipha_type_of_service &= 0xFC; \
253 ((ipha_t *)(iph))->ipha_type_of_service |= IPH_ECN_ECT0; \
254 } else { \
255 ((ip6_t *)(iph))->ip6_vcf &= htonl(0xFFCFFFFF); \
256 ((ip6_t *)(iph))->ip6_vcf |= htonl(IPH_ECN_ECT0 << 20); \
257 }
258
259 /*
260 * Set tcp_rto with boundary checking.
261 */
262 #define TCP_SET_RTO(tcp, rto) \
263 if ((rto) < (tcp)->tcp_rto_min) \
264 (tcp)->tcp_rto = (tcp)->tcp_rto_min; \
265 else if ((rto) > (tcp)->tcp_rto_max) \
266 (tcp)->tcp_rto = (tcp)->tcp_rto_max; \
267 else \
268 (tcp)->tcp_rto = (rto);
269
270 /*
271 * TCP options struct returned from tcp_parse_options.
272 */
273 typedef struct tcp_opt_s {
274 uint32_t tcp_opt_mss;
275 uint32_t tcp_opt_wscale;
276 uint32_t tcp_opt_ts_val;
277 uint32_t tcp_opt_ts_ecr;
278 tcp_t *tcp;
279 } tcp_opt_t;
280
281 /*
282 * Write-side flow-control is implemented via the per instance STREAMS
283 * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s)
284 * and clearing QFULL and calling qbackenable() to restart the flow based
285 * on the number of TCP unsent bytes (i.e. those not on the wire waiting
286 * for a remote ACK).
287 *
288 * This is different than a standard STREAMS kmod which when using the
289 * STREAMS Q the framework would automatictly flow-control based on the
290 * defined hiwat/lowat values as mblk_t's are enqueued/dequeued.
291 *
292 * As of FireEngine TCP write-side flow-control needs to take into account
293 * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes
294 * (i.e. from tcp_wput() -> tcp_output()).
295 *
296 * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to
297 * count the number of bytes enqueued by tcp_wput() and the number of bytes
298 * dequeued and processed by tcp_output().
299 *
300 * So, the total number of bytes unsent is (squeue_bytes + unsent) with all
301 * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES.
302 */
303 extern void tcp_clrqfull(tcp_t *);
304 extern void tcp_setqfull(tcp_t *);
305
306 #define TCP_UNSENT_BYTES(tcp) \
307 ((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent)
308
309 /*
310 * Linked list struct to store listener connection limit configuration per
311 * IP stack. The list is stored at tcps_listener_conf in tcp_stack_t.
312 *
313 * tl_port: the listener port of this limit configuration
314 * tl_ratio: the maximum amount of memory consumed by all concurrent TCP
315 * connections created by a listener does not exceed 1/tl_ratio
316 * of the total system memory. Note that this is only an
317 * approximation.
318 * tl_link: linked list struct
319 */
320 typedef struct tcp_listener_s {
321 in_port_t tl_port;
322 uint32_t tl_ratio;
323 list_node_t tl_link;
324 } tcp_listener_t;
325
326 /*
327 * If there is a limit set on the number of connections allowed per each
328 * listener, the following struct is used to store that counter. It keeps
329 * the number of TCP connection created by a listener. Note that this needs
330 * to be separated from the listener since the listener can go away before
331 * all the connections are gone.
332 *
333 * When the struct is allocated, tlc_cnt is set to 1. When a new connection
334 * is created by the listener, tlc_cnt is incremented by 1. When a connection
335 * created by the listener goes away, tlc_count is decremented by 1. When the
336 * listener itself goes away, tlc_cnt is decremented by one. The last
337 * connection (or the listener) which decrements tlc_cnt to zero frees the
338 * struct.
339 *
340 * tlc_max is the maximum number of concurrent TCP connections created from a
341 * listner. It is calculated when the tcp_listen_cnt_t is allocated.
342 *
343 * tlc_report_time stores the time when cmn_err() is called to report that the
344 * max has been exceeeded. Report is done at most once every
345 * TCP_TLC_REPORT_INTERVAL mins for a listener.
346 *
347 * tlc_drop stores the number of connection attempt dropped because the
348 * limit has reached.
349 */
350 typedef struct tcp_listen_cnt_s {
351 uint32_t tlc_max;
352 uint32_t tlc_cnt;
353 int64_t tlc_report_time;
354 uint32_t tlc_drop;
355 } tcp_listen_cnt_t;
356
357 #define TCP_TLC_REPORT_INTERVAL (30 * MINUTES)
358
359 #define TCP_DECR_LISTEN_CNT(tcp) \
360 { \
361 ASSERT((tcp)->tcp_listen_cnt->tlc_cnt > 0); \
362 if (atomic_add_32_nv(&(tcp)->tcp_listen_cnt->tlc_cnt, -1) == 0) \
363 kmem_free((tcp)->tcp_listen_cnt, sizeof (tcp_listen_cnt_t)); \
364 (tcp)->tcp_listen_cnt = NULL; \
365 }
366
367 /* Increment and decrement the number of connections in tcp_stack_t. */
368 #define TCPS_CONN_INC(tcps) \
369 atomic_inc_64( \
370 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt)
371
372 #define TCPS_CONN_DEC(tcps) \
373 atomic_dec_64( \
374 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt)
375
376 /*
377 * When the system is under memory pressure, stack variable tcps_reclaim is
378 * true, we shorten the connection timeout abort interval to tcp_early_abort
379 * seconds. Defined in tcp.c.
380 */
381 extern uint32_t tcp_early_abort;
382
383 /*
384 * To reach to an eager in Q0 which can be dropped due to an incoming
385 * new SYN request when Q0 is full, a new doubly linked list is
386 * introduced. This list allows to select an eager from Q0 in O(1) time.
387 * This is needed to avoid spending too much time walking through the
388 * long list of eagers in Q0 when tcp_drop_q0() is called. Each member of
389 * this new list has to be a member of Q0.
390 * This list is headed by listener's tcp_t. When the list is empty,
391 * both the pointers - tcp_eager_next_drop_q0 and tcp_eager_prev_drop_q0,
392 * of listener's tcp_t point to listener's tcp_t itself.
393 *
394 * Given an eager in Q0 and a listener, MAKE_DROPPABLE() puts the eager
395 * in the list. MAKE_UNDROPPABLE() takes the eager out of the list.
396 * These macros do not affect the eager's membership to Q0.
397 */
398 #define MAKE_DROPPABLE(listener, eager) \
399 if ((eager)->tcp_eager_next_drop_q0 == NULL) { \
400 (listener)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0\
401 = (eager); \
402 (eager)->tcp_eager_prev_drop_q0 = (listener); \
403 (eager)->tcp_eager_next_drop_q0 = \
404 (listener)->tcp_eager_next_drop_q0; \
405 (listener)->tcp_eager_next_drop_q0 = (eager); \
406 }
407
408 #define MAKE_UNDROPPABLE(eager) \
409 if ((eager)->tcp_eager_next_drop_q0 != NULL) { \
410 (eager)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0 \
411 = (eager)->tcp_eager_prev_drop_q0; \
412 (eager)->tcp_eager_prev_drop_q0->tcp_eager_next_drop_q0 \
413 = (eager)->tcp_eager_next_drop_q0; \
414 (eager)->tcp_eager_prev_drop_q0 = NULL; \
415 (eager)->tcp_eager_next_drop_q0 = NULL; \
416 }
417
418 /*
419 * The format argument to pass to tcp_display().
420 * DISP_PORT_ONLY means that the returned string has only port info.
421 * DISP_ADDR_AND_PORT means that the returned string also contains the
422 * remote and local IP address.
423 */
424 #define DISP_PORT_ONLY 1
425 #define DISP_ADDR_AND_PORT 2
426
427 #define IP_ADDR_CACHE_SIZE 2048
428 #define IP_ADDR_CACHE_HASH(faddr) \
429 (ntohl(faddr) & (IP_ADDR_CACHE_SIZE -1))
430
431 /* TCP cwnd burst factor. */
432 #define TCP_CWND_INFINITE 65535
433 #define TCP_CWND_SS 3
434 #define TCP_CWND_NORMAL 5
435
436 /*
437 * TCP reassembly macros. We hide starting and ending sequence numbers in
438 * b_next and b_prev of messages on the reassembly queue. The messages are
439 * chained using b_cont. These macros are used in tcp_reass() so we don't
440 * have to see the ugly casts and assignments.
441 */
442 #define TCP_REASS_SEQ(mp) ((uint32_t)(uintptr_t)((mp)->b_next))
443 #define TCP_REASS_SET_SEQ(mp, u) ((mp)->b_next = \
444 (mblk_t *)(uintptr_t)(u))
445 #define TCP_REASS_END(mp) ((uint32_t)(uintptr_t)((mp)->b_prev))
446 #define TCP_REASS_SET_END(mp, u) ((mp)->b_prev = \
447 (mblk_t *)(uintptr_t)(u))
448
449 #define tcps_time_wait_interval tcps_propinfo_tbl[0].prop_cur_uval
450 #define tcps_conn_req_max_q tcps_propinfo_tbl[1].prop_cur_uval
451 #define tcps_conn_req_max_q0 tcps_propinfo_tbl[2].prop_cur_uval
452 #define tcps_conn_req_min tcps_propinfo_tbl[3].prop_cur_uval
453 #define tcps_conn_grace_period tcps_propinfo_tbl[4].prop_cur_uval
454 #define tcps_cwnd_max_ tcps_propinfo_tbl[5].prop_cur_uval
455 #define tcps_dbg tcps_propinfo_tbl[6].prop_cur_uval
456 #define tcps_smallest_nonpriv_port tcps_propinfo_tbl[7].prop_cur_uval
457 #define tcps_ip_abort_cinterval tcps_propinfo_tbl[8].prop_cur_uval
458 #define tcps_ip_abort_linterval tcps_propinfo_tbl[9].prop_cur_uval
459 #define tcps_ip_abort_interval tcps_propinfo_tbl[10].prop_cur_uval
460 #define tcps_ip_notify_cinterval tcps_propinfo_tbl[11].prop_cur_uval
461 #define tcps_ip_notify_interval tcps_propinfo_tbl[12].prop_cur_uval
462 #define tcps_ipv4_ttl tcps_propinfo_tbl[13].prop_cur_uval
463 #define tcps_keepalive_interval_high tcps_propinfo_tbl[14].prop_max_uval
464 #define tcps_keepalive_interval tcps_propinfo_tbl[14].prop_cur_uval
465 #define tcps_keepalive_interval_low tcps_propinfo_tbl[14].prop_min_uval
466 #define tcps_maxpsz_multiplier tcps_propinfo_tbl[15].prop_cur_uval
467 #define tcps_mss_def_ipv4 tcps_propinfo_tbl[16].prop_cur_uval
468 #define tcps_mss_max_ipv4 tcps_propinfo_tbl[17].prop_cur_uval
469 #define tcps_mss_min tcps_propinfo_tbl[18].prop_cur_uval
470 #define tcps_naglim_def tcps_propinfo_tbl[19].prop_cur_uval
471 #define tcps_rexmit_interval_initial_high \
472 tcps_propinfo_tbl[20].prop_max_uval
473 #define tcps_rexmit_interval_initial tcps_propinfo_tbl[20].prop_cur_uval
474 #define tcps_rexmit_interval_initial_low \
475 tcps_propinfo_tbl[20].prop_min_uval
476 #define tcps_rexmit_interval_max_high tcps_propinfo_tbl[21].prop_max_uval
477 #define tcps_rexmit_interval_max tcps_propinfo_tbl[21].prop_cur_uval
478 #define tcps_rexmit_interval_max_low tcps_propinfo_tbl[21].prop_min_uval
479 #define tcps_rexmit_interval_min_high tcps_propinfo_tbl[22].prop_max_uval
480 #define tcps_rexmit_interval_min tcps_propinfo_tbl[22].prop_cur_uval
481 #define tcps_rexmit_interval_min_low tcps_propinfo_tbl[22].prop_min_uval
482 #define tcps_deferred_ack_interval tcps_propinfo_tbl[23].prop_cur_uval
483 #define tcps_snd_lowat_fraction tcps_propinfo_tbl[24].prop_cur_uval
484 #define tcps_dupack_fast_retransmit tcps_propinfo_tbl[25].prop_cur_uval
485 #define tcps_ignore_path_mtu tcps_propinfo_tbl[26].prop_cur_bval
486 #define tcps_smallest_anon_port tcps_propinfo_tbl[27].prop_cur_uval
487 #define tcps_largest_anon_port tcps_propinfo_tbl[28].prop_cur_uval
488 #define tcps_xmit_hiwat tcps_propinfo_tbl[29].prop_cur_uval
489 #define tcps_xmit_lowat tcps_propinfo_tbl[30].prop_cur_uval
490 #define tcps_recv_hiwat tcps_propinfo_tbl[31].prop_cur_uval
491 #define tcps_recv_hiwat_minmss tcps_propinfo_tbl[32].prop_cur_uval
492 #define tcps_fin_wait_2_flush_interval_high \
493 tcps_propinfo_tbl[33].prop_max_uval
494 #define tcps_fin_wait_2_flush_interval tcps_propinfo_tbl[33].prop_cur_uval
495 #define tcps_fin_wait_2_flush_interval_low \
496 tcps_propinfo_tbl[33].prop_min_uval
497 #define tcps_max_buf tcps_propinfo_tbl[34].prop_cur_uval
498 #define tcps_strong_iss tcps_propinfo_tbl[35].prop_cur_uval
499 #define tcps_rtt_updates tcps_propinfo_tbl[36].prop_cur_uval
500 #define tcps_wscale_always tcps_propinfo_tbl[37].prop_cur_bval
501 #define tcps_tstamp_always tcps_propinfo_tbl[38].prop_cur_bval
502 #define tcps_tstamp_if_wscale tcps_propinfo_tbl[39].prop_cur_bval
503 #define tcps_rexmit_interval_extra tcps_propinfo_tbl[40].prop_cur_uval
504 #define tcps_deferred_acks_max tcps_propinfo_tbl[41].prop_cur_uval
505 #define tcps_slow_start_after_idle tcps_propinfo_tbl[42].prop_cur_uval
506 #define tcps_slow_start_initial tcps_propinfo_tbl[43].prop_cur_uval
507 #define tcps_sack_permitted tcps_propinfo_tbl[44].prop_cur_uval
508 #define tcps_ipv6_hoplimit tcps_propinfo_tbl[45].prop_cur_uval
509 #define tcps_mss_def_ipv6 tcps_propinfo_tbl[46].prop_cur_uval
510 #define tcps_mss_max_ipv6 tcps_propinfo_tbl[47].prop_cur_uval
511 #define tcps_rev_src_routes tcps_propinfo_tbl[48].prop_cur_bval
512 #define tcps_local_dack_interval tcps_propinfo_tbl[49].prop_cur_uval
513 #define tcps_local_dacks_max tcps_propinfo_tbl[50].prop_cur_uval
514 #define tcps_ecn_permitted tcps_propinfo_tbl[51].prop_cur_uval
515 #define tcps_rst_sent_rate_enabled tcps_propinfo_tbl[52].prop_cur_bval
516 #define tcps_rst_sent_rate tcps_propinfo_tbl[53].prop_cur_uval
517 #define tcps_push_timer_interval tcps_propinfo_tbl[54].prop_cur_uval
518 #define tcps_use_smss_as_mss_opt tcps_propinfo_tbl[55].prop_cur_bval
519 #define tcps_keepalive_abort_interval_high \
520 tcps_propinfo_tbl[56].prop_max_uval
521 #define tcps_keepalive_abort_interval \
522 tcps_propinfo_tbl[56].prop_cur_uval
523 #define tcps_keepalive_abort_interval_low \
524 tcps_propinfo_tbl[56].prop_min_uval
525 #define tcps_wroff_xtra tcps_propinfo_tbl[57].prop_cur_uval
526 #define tcps_dev_flow_ctl tcps_propinfo_tbl[58].prop_cur_bval
527 #define tcps_reass_timeout tcps_propinfo_tbl[59].prop_cur_uval
528 #define tcps_iss_incr tcps_propinfo_tbl[65].prop_cur_uval
529
530 extern struct qinit tcp_rinitv4, tcp_rinitv6;
531 extern boolean_t do_tcp_fusion;
532
533 /*
534 * Object to represent database of options to search passed to
535 * {sock,tpi}optcom_req() interface routine to take care of option
536 * management and associated methods.
537 */
538 extern optdb_obj_t tcp_opt_obj;
539 extern uint_t tcp_max_optsize;
540
541 extern int tcp_squeue_flag;
542
543 extern uint_t tcp_free_list_max_cnt;
544
545 /*
546 * Functions in tcp.c.
547 */
548 extern void tcp_acceptor_hash_insert(t_uscalar_t, tcp_t *);
549 extern tcp_t *tcp_acceptor_hash_lookup(t_uscalar_t, tcp_stack_t *);
550 extern void tcp_acceptor_hash_remove(tcp_t *);
551 extern mblk_t *tcp_ack_mp(tcp_t *);
552 extern int tcp_build_hdrs(tcp_t *);
553 extern void tcp_cleanup(tcp_t *);
554 extern int tcp_clean_death(tcp_t *, int);
555 extern void tcp_clean_death_wrapper(void *, mblk_t *, void *,
556 ip_recv_attr_t *);
557 extern void tcp_close_common(conn_t *, int);
558 extern void tcp_close_detached(tcp_t *);
559 extern void tcp_close_mpp(mblk_t **);
560 extern void tcp_closei_local(tcp_t *);
561 extern sock_lower_handle_t tcp_create(int, int, int, sock_downcalls_t **,
562 uint_t *, int *, int, cred_t *);
563 extern conn_t *tcp_create_common(cred_t *, boolean_t, boolean_t, int *);
564 extern void tcp_disconnect(tcp_t *, mblk_t *);
565 extern char *tcp_display(tcp_t *, char *, char);
566 extern int tcp_do_bind(conn_t *, struct sockaddr *, socklen_t, cred_t *,
567 boolean_t);
568 extern int tcp_do_connect(conn_t *, const struct sockaddr *, socklen_t,
569 cred_t *, pid_t);
570 extern int tcp_do_listen(conn_t *, struct sockaddr *, socklen_t, int,
571 cred_t *, boolean_t);
572 extern int tcp_do_unbind(conn_t *);
573 extern boolean_t tcp_eager_blowoff(tcp_t *, t_scalar_t);
574 extern void tcp_eager_cleanup(tcp_t *, boolean_t);
575 extern void tcp_eager_kill(void *, mblk_t *, void *, ip_recv_attr_t *);
576 extern void tcp_eager_unlink(tcp_t *);
577 extern void tcp_init_values(tcp_t *, tcp_t *);
578 extern void tcp_ipsec_cleanup(tcp_t *);
579 extern int tcp_maxpsz_set(tcp_t *, boolean_t);
580 extern void tcp_mss_set(tcp_t *, uint32_t);
581 extern void tcp_reinput(conn_t *, mblk_t *, ip_recv_attr_t *, ip_stack_t *);
582 extern void tcp_rsrv(queue_t *);
583 extern uint_t tcp_rwnd_reopen(tcp_t *);
584 extern int tcp_rwnd_set(tcp_t *, uint32_t);
585 extern int tcp_set_destination(tcp_t *);
586 extern void tcp_set_ws_value(tcp_t *);
587 extern void tcp_stop_lingering(tcp_t *);
588 extern void tcp_update_pmtu(tcp_t *, boolean_t);
589 extern mblk_t *tcp_zcopy_backoff(tcp_t *, mblk_t *, boolean_t);
590 extern boolean_t tcp_zcopy_check(tcp_t *);
591 extern void tcp_zcopy_notify(tcp_t *);
592 extern void tcp_get_proto_props(tcp_t *, struct sock_proto_props *);
593
594 /*
595 * Bind related functions in tcp_bind.c
596 */
597 extern int tcp_bind_check(conn_t *, struct sockaddr *, socklen_t,
598 cred_t *, boolean_t);
599 extern void tcp_bind_hash_insert(tf_t *, tcp_t *, int);
600 extern void tcp_bind_hash_remove(tcp_t *);
601 extern in_port_t tcp_bindi(tcp_t *, in_port_t, const in6_addr_t *,
602 int, boolean_t, boolean_t, boolean_t);
603 extern in_port_t tcp_update_next_port(in_port_t, const tcp_t *,
604 boolean_t);
605
606 /*
607 * Fusion related functions in tcp_fusion.c.
608 */
609 extern void tcp_fuse(tcp_t *, uchar_t *, tcpha_t *);
610 extern void tcp_unfuse(tcp_t *);
611 extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t);
612 extern void tcp_fuse_output_urg(tcp_t *, mblk_t *);
613 extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **);
614 extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t);
615 extern int tcp_fuse_maxpsz(tcp_t *);
616 extern void tcp_fuse_backenable(tcp_t *);
617 extern void tcp_iss_key_init(uint8_t *, int, tcp_stack_t *);
618
619 /*
620 * Output related functions in tcp_output.c.
621 */
622 extern void tcp_close_output(void *, mblk_t *, void *, ip_recv_attr_t *);
623 extern void tcp_output(void *, mblk_t *, void *, ip_recv_attr_t *);
624 extern void tcp_output_urgent(void *, mblk_t *, void *, ip_recv_attr_t *);
625 extern void tcp_rexmit_after_error(tcp_t *);
626 extern void tcp_sack_rexmit(tcp_t *, uint_t *);
627 extern void tcp_send_data(tcp_t *, mblk_t *);
628 extern void tcp_send_synack(void *, mblk_t *, void *, ip_recv_attr_t *);
629 extern void tcp_shutdown_output(void *, mblk_t *, void *, ip_recv_attr_t *);
630 extern void tcp_ss_rexmit(tcp_t *);
631 extern void tcp_update_xmit_tail(tcp_t *, uint32_t);
632 extern void tcp_wput(queue_t *, mblk_t *);
633 extern void tcp_wput_data(tcp_t *, mblk_t *, boolean_t);
634 extern void tcp_wput_sock(queue_t *, mblk_t *);
635 extern void tcp_wput_fallback(queue_t *, mblk_t *);
636 extern void tcp_xmit_ctl(char *, tcp_t *, uint32_t, uint32_t, int);
637 extern void tcp_xmit_listeners_reset(mblk_t *, ip_recv_attr_t *,
638 ip_stack_t *i, conn_t *);
639 extern mblk_t *tcp_xmit_mp(tcp_t *, mblk_t *, int32_t, int32_t *,
640 mblk_t **, uint32_t, boolean_t, uint32_t *, boolean_t);
641
642 /*
643 * Input related functions in tcp_input.c.
644 */
645 extern void tcp_icmp_input(void *, mblk_t *, void *, ip_recv_attr_t *);
646 extern void tcp_input_data(void *, mblk_t *, void *, ip_recv_attr_t *);
647 extern void tcp_input_listener_unbound(void *, mblk_t *, void *,
648 ip_recv_attr_t *);
649 extern boolean_t tcp_paws_check(tcp_t *, tcpha_t *, tcp_opt_t *);
650 extern uint_t tcp_rcv_drain(tcp_t *);
651 extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t, cred_t *);
652 extern boolean_t tcp_verifyicmp(conn_t *, void *, icmph_t *, icmp6_t *,
653 ip_recv_attr_t *);
654
655 /*
656 * Kernel socket related functions in tcp_socket.c.
657 */
658 extern int tcp_fallback(sock_lower_handle_t, queue_t *, boolean_t,
659 so_proto_quiesced_cb_t, sock_quiesce_arg_t *);
660 extern boolean_t tcp_newconn_notify(tcp_t *, ip_recv_attr_t *);
661
662 /*
663 * Timer related functions in tcp_timers.c.
664 */
665 extern void tcp_ack_timer(void *);
666 extern void tcp_close_linger_timeout(void *);
667 extern void tcp_keepalive_timer(void *);
668 extern void tcp_push_timer(void *);
669 extern void tcp_reass_timer(void *);
670 extern mblk_t *tcp_timermp_alloc(int);
671 extern void tcp_timermp_free(tcp_t *);
672 extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), hrtime_t);
673 extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t);
674 extern void tcp_timer(void *arg);
675 extern void tcp_timers_stop(tcp_t *);
676
677 /*
678 * TCP TPI related functions in tcp_tpi.c.
679 */
680 extern void tcp_addr_req(tcp_t *, mblk_t *);
681 extern void tcp_capability_req(tcp_t *, mblk_t *);
682 extern boolean_t tcp_conn_con(tcp_t *, uchar_t *, mblk_t *,
683 mblk_t **, ip_recv_attr_t *);
684 extern void tcp_err_ack(tcp_t *, mblk_t *, int, int);
685 extern void tcp_err_ack_prim(tcp_t *, mblk_t *, int, int, int);
686 extern void tcp_info_req(tcp_t *, mblk_t *);
687 extern void tcp_send_conn_ind(void *, mblk_t *, void *);
688 extern void tcp_send_pending(void *, mblk_t *, void *, ip_recv_attr_t *);
689 extern void tcp_tpi_accept(queue_t *, mblk_t *);
690 extern void tcp_tpi_bind(tcp_t *, mblk_t *);
691 extern int tcp_tpi_close(queue_t *, int);
692 extern int tcp_tpi_close_accept(queue_t *);
693 extern void tcp_tpi_connect(tcp_t *, mblk_t *);
694 extern int tcp_tpi_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *);
695 extern int tcp_tpi_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *,
696 uint_t *, uchar_t *, void *, cred_t *);
697 extern void tcp_tpi_unbind(tcp_t *, mblk_t *);
698 extern void tcp_tli_accept(tcp_t *, mblk_t *);
699 extern void tcp_use_pure_tpi(tcp_t *);
700 extern void tcp_do_capability_ack(tcp_t *, struct T_capability_ack *,
701 t_uscalar_t);
702
703 /*
704 * TCP option processing related functions in tcp_opt_data.c
705 */
706 extern int tcp_opt_get(conn_t *, int, int, uchar_t *);
707 extern int tcp_opt_set(conn_t *, uint_t, int, int, uint_t, uchar_t *,
708 uint_t *, uchar_t *, void *, cred_t *);
709
710 /*
711 * TCP time wait processing related functions in tcp_time_wait.c.
712 */
713 extern void tcp_time_wait_append(tcp_t *);
714 extern void tcp_time_wait_collector(void *);
715 extern boolean_t tcp_time_wait_remove(tcp_t *, tcp_squeue_priv_t *);
716 extern void tcp_time_wait_processing(tcp_t *, mblk_t *, uint32_t,
717 uint32_t, int, tcpha_t *, ip_recv_attr_t *);
718
719 /*
720 * Misc functions in tcp_misc.c.
721 */
722 extern uint32_t tcp_find_listener_conf(tcp_stack_t *, in_port_t);
723 extern void tcp_ioctl_abort_conn(queue_t *, mblk_t *);
724 extern void tcp_listener_conf_cleanup(tcp_stack_t *);
725 extern void tcp_stack_cpu_add(tcp_stack_t *, processorid_t);
726
727 #endif /* _KERNEL */
728
729 #ifdef __cplusplus
730 }
731 #endif
732
733 #endif /* _INET_TCP_IMPL_H */