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) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 #ifndef _INET_SCTP_SCTP_IMPL_H
27 #define _INET_SCTP_SCTP_IMPL_H
28
29 #include <sys/inttypes.h>
30 #include <sys/taskq.h>
31 #include <sys/list.h>
32 #include <sys/strsun.h>
33 #include <sys/zone.h>
34 #include <sys/cpuvar.h>
35 #include <sys/clock_impl.h>
36
37 #include <netinet/ip6.h>
38 #include <inet/optcom.h>
39 #include <inet/tunables.h>
40 #include <netinet/sctp.h>
41 #include <inet/sctp_itf.h>
42 #include "sctp_stack.h"
43
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47
48 /* Streams device identifying info and version */
49 #define SCTP_DEV_IDINFO "SCTP Streams device 1.0"
50
51 #define SSN_GT(a, b) ((int16_t)((a)-(b)) > 0)
52 #define SSN_GE(a, b) ((int16_t)((a)-(b)) >= 0)
53
54 /* Default buffer size and flow control wake up threshold. */
55 #define SCTP_XMIT_LOWATER 8192
56 #define SCTP_XMIT_HIWATER 102400
57 #define SCTP_RECV_LOWATER 8192
58 #define SCTP_RECV_HIWATER 102400
59
60 /* SCTP Timer control structure */
61 typedef struct sctpt_s {
62 pfv_t sctpt_pfv; /* The routine we are to call */
63 struct sctp_s *sctpt_sctp; /* The parameter we are to pass in */
64 struct sctp_faddr_s *sctpt_faddr;
65 } sctpt_t;
66
67 /*
68 * Maximum number of duplicate TSNs we can report. This is currently
69 * static, and governs the size of the mblk used to hold the duplicate
70 * reports. The use of duplcate TSN reports is currently experimental,
71 * so for now a static limit should suffice.
72 */
73 #define SCTP_DUP_MBLK_SZ 64
74
75 #define SCTP_IS_ADDR_UNSPEC(isv4, addr) \
76 ((isv4) ? IN6_IS_ADDR_V4MAPPED_ANY(&(addr)) : \
77 IN6_IS_ADDR_UNSPECIFIED(&(addr)))
78
79 /*
80 * SCTP properties/tunables
81 */
82 #define sctps_max_init_retr sctps_propinfo_tbl[0].prop_cur_uval
83 #define sctps_max_init_retr_high sctps_propinfo_tbl[0].prop_max_uval
84 #define sctps_max_init_retr_low sctps_propinfo_tbl[0].prop_min_uval
85 #define sctps_pa_max_retr sctps_propinfo_tbl[1].prop_cur_uval
86 #define sctps_pa_max_retr_high sctps_propinfo_tbl[1].prop_max_uval
87 #define sctps_pa_max_retr_low sctps_propinfo_tbl[1].prop_min_uval
88 #define sctps_pp_max_retr sctps_propinfo_tbl[2].prop_cur_uval
89 #define sctps_pp_max_retr_high sctps_propinfo_tbl[2].prop_max_uval
90 #define sctps_pp_max_retr_low sctps_propinfo_tbl[2].prop_min_uval
91 #define sctps_cwnd_max_ sctps_propinfo_tbl[3].prop_cur_uval
92 #define sctps_smallest_nonpriv_port sctps_propinfo_tbl[4].prop_cur_uval
93 #define sctps_ipv4_ttl sctps_propinfo_tbl[5].prop_cur_uval
94 #define sctps_heartbeat_interval sctps_propinfo_tbl[6].prop_cur_uval
95 #define sctps_heartbeat_interval_high sctps_propinfo_tbl[6].prop_max_uval
96 #define sctps_heartbeat_interval_low sctps_propinfo_tbl[6].prop_min_uval
97 #define sctps_initial_mtu sctps_propinfo_tbl[7].prop_cur_uval
98 #define sctps_mtu_probe_interval sctps_propinfo_tbl[8].prop_cur_uval
99 #define sctps_new_secret_interval sctps_propinfo_tbl[9].prop_cur_uval
100 #define sctps_deferred_ack_interval sctps_propinfo_tbl[10].prop_cur_uval
101 #define sctps_snd_lowat_fraction sctps_propinfo_tbl[11].prop_cur_uval
102 #define sctps_ignore_path_mtu sctps_propinfo_tbl[12].prop_cur_bval
103 #define sctps_initial_ssthresh sctps_propinfo_tbl[13].prop_cur_uval
104 #define sctps_smallest_anon_port sctps_propinfo_tbl[14].prop_cur_uval
105 #define sctps_largest_anon_port sctps_propinfo_tbl[15].prop_cur_uval
106 #define sctps_xmit_hiwat sctps_propinfo_tbl[16].prop_cur_uval
107 #define sctps_xmit_lowat sctps_propinfo_tbl[17].prop_cur_uval
108 #define sctps_recv_hiwat sctps_propinfo_tbl[18].prop_cur_uval
109 #define sctps_max_buf sctps_propinfo_tbl[19].prop_cur_uval
110 #define sctps_rtt_updates sctps_propinfo_tbl[20].prop_cur_uval
111 #define sctps_ipv6_hoplimit sctps_propinfo_tbl[21].prop_cur_uval
112 #define sctps_rto_ming sctps_propinfo_tbl[22].prop_cur_uval
113 #define sctps_rto_ming_high sctps_propinfo_tbl[22].prop_max_uval
114 #define sctps_rto_ming_low sctps_propinfo_tbl[22].prop_min_uval
115 #define sctps_rto_maxg sctps_propinfo_tbl[23].prop_cur_uval
116 #define sctps_rto_maxg_high sctps_propinfo_tbl[23].prop_max_uval
117 #define sctps_rto_maxg_low sctps_propinfo_tbl[23].prop_min_uval
118 #define sctps_rto_initialg sctps_propinfo_tbl[24].prop_cur_uval
119 #define sctps_rto_initialg_high sctps_propinfo_tbl[24].prop_max_uval
120 #define sctps_rto_initialg_low sctps_propinfo_tbl[24].prop_min_uval
121 #define sctps_cookie_life sctps_propinfo_tbl[25].prop_cur_uval
122 #define sctps_cookie_life_high sctps_propinfo_tbl[25].prop_max_uval
123 #define sctps_cookie_life_low sctps_propinfo_tbl[25].prop_min_uval
124 #define sctps_max_in_streams sctps_propinfo_tbl[26].prop_cur_uval
125 #define sctps_max_in_streams_high sctps_propinfo_tbl[26].prop_max_uval
126 #define sctps_max_in_streams_low sctps_propinfo_tbl[26].prop_min_uval
127 #define sctps_initial_out_streams sctps_propinfo_tbl[27].prop_cur_uval
128 #define sctps_initial_out_streams_high sctps_propinfo_tbl[27].prop_max_uval
129 #define sctps_initial_out_streams_low sctps_propinfo_tbl[27].prop_min_uval
130 #define sctps_shutack_wait_bound sctps_propinfo_tbl[28].prop_cur_uval
131 #define sctps_maxburst sctps_propinfo_tbl[29].prop_cur_uval
132 #define sctps_addip_enabled sctps_propinfo_tbl[30].prop_cur_bval
133 #define sctps_recv_hiwat_minmss sctps_propinfo_tbl[31].prop_cur_uval
134 #define sctps_slow_start_initial sctps_propinfo_tbl[32].prop_cur_uval
135 #define sctps_slow_start_after_idle sctps_propinfo_tbl[33].prop_cur_uval
136 #define sctps_prsctp_enabled sctps_propinfo_tbl[34].prop_cur_bval
137 #define sctps_fast_rxt_thresh sctps_propinfo_tbl[35].prop_cur_uval
138 #define sctps_deferred_acks_max sctps_propinfo_tbl[36].prop_cur_uval
139 #define sctps_wroff_xtra sctps_propinfo_tbl[37].prop_cur_uval
140
141 /*
142 * Retransmission timer start and stop macro for a given faddr.
143 */
144 #define SCTP_FADDR_TIMER_RESTART(sctp, fp, intvl) \
145 { \
146 dprint(3, ("faddr_timer_restart: fp=%p %x:%x:%x:%x %d\n", \
147 (void *)(fp), SCTP_PRINTADDR((fp)->sf_faddr), (int)(intvl))); \
148 sctp_timer((sctp), (fp)->sf_timer_mp, (intvl)); \
149 (fp)->sf_timer_running = 1; \
150 }
151
152 #define SCTP_FADDR_TIMER_STOP(fp) \
153 ASSERT((fp)->sf_timer_mp != NULL); \
154 if ((fp)->sf_timer_running) { \
155 sctp_timer_stop((fp)->sf_timer_mp); \
156 (fp)->sf_timer_running = 0; \
157 }
158
159 /* For per endpoint association statistics */
160 #define SCTP_MAX_RTO(sctp, fp) { \
161 /* \
162 * Record the maximum observed RTO, \
163 * sctp_maxrto is zeroed elsewhere \
164 * at the end of each stats request. \
165 */ \
166 (sctp)->sctp_maxrto = \
167 MAX((sctp)->sctp_maxrto, (fp)->sf_rto); \
168 DTRACE_PROBE2(sctp__maxrto, sctp_t *, \
169 sctp, struct sctp_faddr_s, fp); \
170 }
171
172 #define SCTP_CALC_RXT(sctp, fp, max) \
173 { \
174 if (((fp)->sf_rto <<= 1) > (max)) \
175 (fp)->sf_rto = (max); \
176 SCTP_MAX_RTO(sctp, fp); \
177 }
178
179
180 #define SCTP_MAX_COMBINED_HEADER_LENGTH (60 + 12) /* Maxed out ip + sctp */
181 #define SCTP_MAX_IP_OPTIONS_LENGTH (60 - IP_SIMPLE_HDR_LENGTH)
182 #define SCTP_MAX_HDR_LENGTH 60
183
184 #define SCTP_SECRET_LEN 16
185
186 #define SCTP_REFHOLD(sctp) { \
187 mutex_enter(&(sctp)->sctp_reflock); \
188 (sctp)->sctp_refcnt++; \
189 DTRACE_PROBE1(sctp_refhold, sctp_t, sctp); \
190 ASSERT((sctp)->sctp_refcnt != 0); \
191 mutex_exit(&(sctp)->sctp_reflock); \
192 }
193
194 #define SCTP_REFRELE(sctp) { \
195 mutex_enter(&(sctp)->sctp_reflock); \
196 ASSERT((sctp)->sctp_refcnt != 0); \
197 if (--(sctp)->sctp_refcnt == 0) { \
198 DTRACE_PROBE1(sctp_refrele, sctp_t, sctp); \
199 mutex_exit(&(sctp)->sctp_reflock); \
200 CONN_DEC_REF((sctp)->sctp_connp); \
201 } else { \
202 DTRACE_PROBE1(sctp_refrele, sctp_t, sctp); \
203 mutex_exit(&(sctp)->sctp_reflock); \
204 } \
205 }
206
207 #define SCTP_PRINTADDR(a) (a).s6_addr32[0], (a).s6_addr32[1],\
208 (a).s6_addr32[2], (a).s6_addr32[3]
209
210 #define CONN2SCTP(conn) ((sctp_t *)(&((conn_t *)conn)[1]))
211
212 /*
213 * Outbound data, flags and macros for per-message, per-chunk info
214 */
215 typedef struct {
216 int64_t smh_ttl; /* Time to Live */
217 int64_t smh_tob; /* Time of Birth */
218 uint32_t smh_context;
219 uint16_t smh_sid;
220 uint16_t smh_ssn;
221 uint32_t smh_ppid;
222 uint16_t smh_flags;
223 uint32_t smh_msglen;
224 } sctp_msg_hdr_t;
225
226 #define SCTP_CHUNK_FLAG_SENT 0x01
227 #define SCTP_CHUNK_FLAG_REXMIT 0x02
228 #define SCTP_CHUNK_FLAG_ACKED 0x04
229 #define SCTP_MSG_FLAG_CHUNKED 0x08
230 #define SCTP_MSG_FLAG_ABANDONED 0x10
231 #define SCTP_CHUNK_FLAG_ABANDONED 0x20
232
233 #define SCTP_CHUNK_CLEAR_FLAGS(mp) ((mp)->b_flag = 0)
234 /*
235 * If we are transmitting the chunk for the first time we assign the TSN and
236 * SSN here. The reason we assign the SSN here (as opposed to doing it in
237 * sctp_chunkify()) is that the chunk may expire, if PRSCTP is enabled, before
238 * we get a chance to send it out. If we assign the SSN in sctp_chunkify()
239 * and this happens, then we need to send a Forward TSN to the peer, which
240 * will be expecting this SSN, assuming ordered. If we assign it here we
241 * can just take out the chunk from the transmit list without having to
242 * send a Forward TSN chunk. While assigning the SSN we use (meta)->b_cont
243 * to determine if it needs a new SSN (i.e. the next SSN for the stream),
244 * since (meta)->b_cont signifies the first chunk of a message (if the message
245 * is unordered, then the SSN is 0).
246 *
247 */
248 #define SCTP_CHUNK_SENT(sctp, mp, sdc, fp, chunkdata, meta) { \
249 if (!SCTP_CHUNK_ISSENT(mp)) { \
250 sctp_msg_hdr_t *mhdr = (sctp_msg_hdr_t *)(meta)->b_rptr; \
251 ASSERT(!SCTP_CHUNK_ABANDONED(mp)); \
252 (mp)->b_flag = SCTP_CHUNK_FLAG_SENT; \
253 (sdc)->sdh_tsn = htonl((sctp)->sctp_ltsn++); \
254 if ((mhdr)->smh_flags & MSG_UNORDERED) { \
255 (sdc)->sdh_ssn = 0; \
256 SCTP_DATA_SET_UBIT(sdc); \
257 BUMP_LOCAL((sctp)->sctp_oudchunks); \
258 } else { \
259 BUMP_LOCAL((sctp)->sctp_odchunks); \
260 if ((mp) == (meta)->b_cont) { \
261 mhdr->smh_ssn = htons( \
262 (sctp)->sctp_ostrcntrs[mhdr->smh_sid]++); \
263 } \
264 (sdc)->sdh_ssn = mhdr->smh_ssn; \
265 } \
266 DTRACE_PROBE3(sctp__chunk__sent1, sctp_t *, sctp, \
267 mblk_t *, mp, mblk_t *, meta); \
268 (sctp)->sctp_unacked += (chunkdata); \
269 (sctp)->sctp_unsent -= (chunkdata); \
270 (sctp)->sctp_frwnd -= (chunkdata); \
271 } else { \
272 if (SCTP_CHUNK_ISACKED(mp)) { \
273 (sctp)->sctp_unacked += (chunkdata); \
274 } else { \
275 ASSERT(SCTP_CHUNK_DEST(mp)->sf_suna >= ((chunkdata) + \
276 sizeof (*sdc))); \
277 SCTP_CHUNK_DEST(mp)->sf_suna -= ((chunkdata) + \
278 sizeof (*sdc)); \
279 } \
280 DTRACE_PROBE3(sctp__chunk__sent2, sctp_t *, sctp, \
281 mblk_t *, mp, mblk_t *, meta); \
282 (mp)->b_flag &= ~(SCTP_CHUNK_FLAG_REXMIT | \
283 SCTP_CHUNK_FLAG_ACKED); \
284 SCTP_CHUNK_SET_SACKCNT(mp, 0); \
285 BUMP_LOCAL(sctp->sctp_rxtchunks); \
286 BUMP_LOCAL((sctp)->sctp_T3expire); \
287 BUMP_LOCAL((fp)->sf_T3expire); \
288 } \
289 SCTP_SET_CHUNK_DEST(mp, fp); \
290 (fp)->sf_suna += ((chunkdata) + sizeof (*sdc)); \
291 }
292
293 #define SCTP_CHUNK_ISSENT(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_SENT)
294 #define SCTP_CHUNK_CANSEND(mp) \
295 (!(SCTP_CHUNK_ABANDONED(mp)) && \
296 (((mp)->b_flag & (SCTP_CHUNK_FLAG_REXMIT|SCTP_CHUNK_FLAG_SENT)) != \
297 SCTP_CHUNK_FLAG_SENT))
298
299 #define SCTP_CHUNK_DEST(mp) ((sctp_faddr_t *)(mp)->b_queue)
300 #define SCTP_SET_CHUNK_DEST(mp, fp) ((mp)->b_queue = (queue_t *)fp)
301
302 #define SCTP_CHUNK_REXMIT(sctp, mp) { \
303 DTRACE_PROBE2(sctp__chunk__rexmit, sctp_t *, sctp, mblk_t *, \
304 mp); \
305 (mp)->b_flag |= SCTP_CHUNK_FLAG_REXMIT; \
306 }
307 #define SCTP_CHUNK_CLEAR_REXMIT(mp) ((mp)->b_flag &= ~SCTP_CHUNK_FLAG_REXMIT)
308 #define SCTP_CHUNK_WANT_REXMIT(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_REXMIT)
309
310 #define SCTP_CHUNK_ACKED(mp) \
311 ((mp)->b_flag = (SCTP_CHUNK_FLAG_SENT|SCTP_CHUNK_FLAG_ACKED))
312 #define SCTP_CHUNK_ISACKED(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_ACKED)
313 #define SCTP_CHUNK_CLEAR_ACKED(sctp, mp) { \
314 DTRACE_PROBE2(sctp__chunk__clracked, sctp_t *, sctp, mblk_t *, \
315 mp); \
316 (mp)->b_flag &= ~SCTP_CHUNK_FLAG_ACKED; \
317 }
318
319 #define SCTP_CHUNK_SACKCNT(mp) ((intptr_t)((mp)->b_prev))
320 #define SCTP_CHUNK_SET_SACKCNT(mp, val) ((mp)->b_prev = \
321 (mblk_t *)(uintptr_t)(val))
322
323 #define SCTP_MSG_SET_CHUNKED(mp) ((mp)->b_flag |= SCTP_MSG_FLAG_CHUNKED)
324 #define SCTP_MSG_CLEAR_CHUNKED(mp)((mp)->b_flag &= ~SCTP_MSG_FLAG_CHUNKED)
325 #define SCTP_IS_MSG_CHUNKED(mp) ((mp)->b_flag & SCTP_MSG_FLAG_CHUNKED)
326
327 /* For PR-SCTP */
328 #define SCTP_ABANDON_CHUNK(mp) ((mp)->b_flag |= SCTP_CHUNK_FLAG_ABANDONED)
329 #define SCTP_CHUNK_ABANDONED(mp) \
330 ((mp)->b_flag & SCTP_CHUNK_FLAG_ABANDONED)
331
332 #define SCTP_MSG_SET_ABANDONED(mp) \
333 ((mp)->b_flag |= SCTP_MSG_FLAG_ABANDONED)
334 #define SCTP_MSG_CLEAR_ABANDONED(mp)((mp)->b_flag &= ~SCTP_MSG_FLAG_ABANDONED)
335 #define SCTP_IS_MSG_ABANDONED(mp) ((mp)->b_flag & SCTP_MSG_FLAG_ABANDONED)
336
337 /*
338 * Check if a message has expired. A message is expired if
339 * 1. It has a non-zero time to live value and has not been sent before
340 * that time expires.
341 * 2. It is sent using PRSCTP and it has not been SACK'ed before
342 * its lifetime expires.
343 */
344 #define SCTP_MSG_TO_BE_ABANDONED(meta, mhdr, sctp) \
345 (((!SCTP_CHUNK_ISSENT((meta)->b_cont) && (mhdr)->smh_ttl > 0) || \
346 ((sctp)->sctp_prsctp_aware && ((mhdr)->smh_flags & MSG_PR_SCTP))) && \
347 ((ddi_get_lbolt64() - (mhdr)->smh_tob) > (mhdr)->smh_ttl))
348
349 /* SCTP association hash function. */
350 #define SCTP_CONN_HASH(sctps, ports) \
351 ((((ports) ^ ((ports) >> 16)) * 31) & \
352 ((sctps)->sctps_conn_hash_size - 1))
353
354 /*
355 * Linked list struct to store SCTP listener association limit configuration
356 * per IP stack. The list is stored at sctps_listener_conf in sctp_stack_t.
357 *
358 * sl_port: the listener port of this limit configuration
359 * sl_ratio: the maximum amount of memory consumed by all concurrent SCTP
360 * connections created by a listener does not exceed 1/tl_ratio
361 * of the total system memory. Note that this is only an
362 * approximation.
363 * sl_link: linked list struct
364 */
365 typedef struct sctp_listener_s {
366 in_port_t sl_port;
367 uint32_t sl_ratio;
368 list_node_t sl_link;
369 } sctp_listener_t;
370
371 /*
372 * If there is a limit set on the number of association allowed per each
373 * listener, the following struct is used to store that counter. It keeps
374 * the number of SCTP association created by a listener. Note that this needs
375 * to be separated from the listener since the listener can go away before
376 * all the associations are gone.
377 *
378 * When the struct is allocated, slc_cnt is set to 1. When a new association
379 * is created by the listener, slc_cnt is incremented by 1. When an
380 * association created by the listener goes away, slc_count is decremented by
381 * 1. When the listener itself goes away, slc_cnt is decremented by one.
382 * The last association (or the listener) which decrements slc_cnt to zero
383 * frees the struct.
384 *
385 * slc_max is the maximum number of concurrent associations created from a
386 * listener. It is calculated when the sctp_listen_cnt_t is allocated.
387 *
388 * slc_report_time stores the time when cmn_err() is called to report that the
389 * max has been exceeeded. Report is done at most once every
390 * SCTP_SLC_REPORT_INTERVAL mins for a listener.
391 *
392 * slc_drop stores the number of connection attempt dropped because the
393 * limit has reached.
394 */
395 typedef struct sctp_listen_cnt_s {
396 uint32_t slc_max;
397 uint32_t slc_cnt;
398 int64_t slc_report_time;
399 uint32_t slc_drop;
400 } sctp_listen_cnt_t;
401
402 #define SCTP_SLC_REPORT_INTERVAL (30 * MINUTES)
403
404 #define SCTP_DECR_LISTEN_CNT(sctp) \
405 { \
406 ASSERT((sctp)->sctp_listen_cnt->slc_cnt > 0); \
407 if (atomic_add_32_nv(&(sctp)->sctp_listen_cnt->slc_cnt, -1) == 0) \
408 kmem_free((sctp)->sctp_listen_cnt, sizeof (sctp_listen_cnt_t));\
409 (sctp)->sctp_listen_cnt = NULL; \
410 }
411
412 /* Increment and decrement the number of associations in sctp_stack_t. */
413 #define SCTPS_ASSOC_INC(sctps) \
414 atomic_inc_64( \
415 (uint64_t *)&(sctps)->sctps_sc[CPU->cpu_seqid]->sctp_sc_assoc_cnt)
416
417 #define SCTPS_ASSOC_DEC(sctps) \
418 atomic_dec_64( \
419 (uint64_t *)&(sctps)->sctps_sc[CPU->cpu_seqid]->sctp_sc_assoc_cnt)
420
421 #define SCTP_ASSOC_EST(sctps, sctp) \
422 { \
423 (sctp)->sctp_state = SCTPS_ESTABLISHED; \
424 (sctp)->sctp_assoc_start_time = (uint32_t)LBOLT_FASTPATH64; \
425 SCTPS_ASSOC_INC(sctps); \
426 }
427
428 /*
429 * Bind hash array size and hash function. The size must be a power
430 * of 2 and lport must be in host byte order.
431 */
432 #define SCTP_BIND_FANOUT_SIZE 2048
433 #define SCTP_BIND_HASH(lport) (((lport) * 31) & (SCTP_BIND_FANOUT_SIZE - 1))
434
435 /* options that SCTP negotiates during association establishment */
436 #define SCTP_PRSCTP_OPTION 0x01
437
438 /*
439 * Listener hash array size and hash function. The size must be a power
440 * of 2 and lport must be in host byte order.
441 */
442 #define SCTP_LISTEN_FANOUT_SIZE 512
443 #define SCTP_LISTEN_HASH(lport) (((lport) * 31) & (SCTP_LISTEN_FANOUT_SIZE - 1))
444
445 typedef struct sctp_tf_s {
446 struct sctp_s *tf_sctp;
447 kmutex_t tf_lock;
448 #define SF_CACHEL_PAD 64
449 uchar_t tf_pad[SF_CACHEL_PAD - (sizeof (struct sctp_s *) +
450 sizeof (kmutex_t))];
451 } sctp_tf_t;
452
453 /* Round up the value to the nearest mss. */
454 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss))
455
456 extern sin_t sctp_sin_null; /* Zero address for quick clears */
457 extern sin6_t sctp_sin6_null; /* Zero address for quick clears */
458
459 #define SCTP_IS_DETACHED(sctp) ((sctp)->sctp_detached)
460
461 /* Data structure used to track received TSNs */
462 typedef struct sctp_set_s {
463 struct sctp_set_s *next;
464 struct sctp_set_s *prev;
465 uint32_t begin;
466 uint32_t end;
467 } sctp_set_t;
468
469 /* Data structure used to track TSNs for PR-SCTP */
470 typedef struct sctp_ftsn_set_s {
471 struct sctp_ftsn_set_s *next;
472 ftsn_entry_t ftsn_entries;
473 } sctp_ftsn_set_t;
474
475 /* Data structure used to track incoming SCTP streams */
476 typedef struct sctp_instr_s {
477 mblk_t *istr_msgs;
478 int istr_nmsgs;
479 uint16_t nextseq;
480 struct sctp_s *sctp;
481 mblk_t *istr_reass;
482 } sctp_instr_t;
483
484 /* Reassembly data structure (per-stream) */
485 typedef struct sctp_reass_s {
486 uint16_t sr_ssn;
487 uint16_t sr_needed;
488 uint16_t sr_got;
489 uint16_t sr_msglen; /* len of consecutive fragments */
490 /* from the begining (B-bit) */
491 mblk_t *sr_tail;
492 boolean_t sr_hasBchunk; /* If the fragment list begins with */
493 /* a B-bit set chunk */
494 uint32_t sr_nexttsn; /* TSN of the next fragment we */
495 /* are expecting */
496 boolean_t sr_partial_delivered;
497 } sctp_reass_t;
498
499 /* debugging */
500 #undef dprint
501 #ifdef DEBUG
502 extern int sctpdebug;
503 #define dprint(level, args) { if (sctpdebug > (level)) printf args; }
504 #else
505 #define dprint(level, args) {}
506 #endif
507
508
509 /* Peer address tracking */
510
511 /*
512 * States for peer addresses
513 *
514 * SCTP_FADDRS_UNCONFIRMED: we have not communicated with this peer address
515 * before, mark it as unconfirmed so that we will not send data to it.
516 * All addresses initially are in unconfirmed state and required
517 * validation. SCTP sends a heartbeat to each of them and when it gets
518 * back a heartbeat ACK, the address will be marked as alive. This
519 * validation fixes a security issue with multihoming. If an attacker
520 * establishes an association with us and tells us that it has addresses
521 * belonging to another host A, this will prevent A from communicating
522 * with us. This is fixed by peer address validation. In the above case,
523 * A will respond with an abort.
524 *
525 * SCTP_FADDRS_ALIVE: this peer address is alive and we can communicate with
526 * it with no problem.
527 *
528 * SCTP_FADDRS_DOWN: we have exceeded the retransmission limit to this
529 * peer address. Once an address is marked down, we will only send
530 * a heartbeat to it every hb_interval in case it becomes alive now.
531 *
532 * SCTP_FADDRS_UNREACH: there is no suitable source address to send to
533 * this peer address. For example, the peer address is v6 but we only
534 * have v4 addresses. It is marked unreachable until there is an
535 * address configuration change. At that time, mark these addresses
536 * as unconfirmed and try again to see if those unreachable addresses
537 * are OK as we may have more source addresses.
538 */
539 typedef enum {
540 SCTP_FADDRS_UNREACH,
541 SCTP_FADDRS_DOWN,
542 SCTP_FADDRS_ALIVE,
543 SCTP_FADDRS_UNCONFIRMED
544 } faddr_state_t;
545
546 typedef struct sctp_faddr_s {
547 struct sctp_faddr_s *sf_next;
548 faddr_state_t sf_state;
549
550 in6_addr_t sf_faddr;
551 in6_addr_t sf_saddr;
552
553 int64_t sf_hb_expiry; /* time to retransmit heartbeat */
554 uint32_t sf_hb_interval; /* the heartbeat interval */
555
556 int sf_rto; /* RTO in tick */
557 int sf_srtt; /* Smoothed RTT in tick */
558 int sf_rttvar; /* RTT variance in tick */
559 uint32_t sf_rtt_updates;
560 int sf_strikes;
561 int sf_max_retr;
562 uint32_t sf_pmss;
563 uint32_t sf_cwnd;
564 uint32_t sf_ssthresh;
565 uint32_t sf_suna; /* sent - unack'ed */
566 uint32_t sf_pba; /* partial bytes acked */
567 uint32_t sf_acked;
568 int64_t sf_lastactive;
569 mblk_t *sf_timer_mp; /* retransmission timer control */
570 uint32_t
571 sf_hb_pending : 1,
572 sf_timer_running : 1,
573 sf_df : 1,
574 sf_pmtu_discovered : 1,
575
576 sf_rc_timer_running : 1,
577 sf_isv4 : 1,
578 sf_hb_enabled : 1;
579
580 mblk_t *sf_rc_timer_mp; /* reliable control chunk timer */
581 ip_xmit_attr_t *sf_ixa; /* Transmit attributes */
582 uint32_t sf_T3expire; /* # of times T3 timer expired */
583
584 uint64_t sf_hb_secret; /* per addr "secret" in heartbeat */
585 uint32_t sf_rxt_unacked; /* # unack'ed retransmitted bytes */
586 } sctp_faddr_t;
587
588 /* Flags to indicate supported address type in the PARM_SUP_ADDRS. */
589 #define PARM_SUPP_V6 0x1
590 #define PARM_SUPP_V4 0x2
591
592 /*
593 * Set heartbeat interval plus jitter. The jitter is supposed to be random,
594 * up to +/- 50% of the RTO. We use gethrtime() here for performance reason
595 * as the jitter does not really need to be "very" random.
596 */
597 #define SET_HB_INTVL(fp) \
598 ((fp)->sf_hb_interval + (fp)->sf_rto + ((fp)->sf_rto >> 1) - \
599 (uint_t)gethrtime() % (fp)->sf_rto)
600
601 #define SCTP_IPIF_HASH 16
602
603 typedef struct sctp_ipif_hash_s {
604 list_t sctp_ipif_list;
605 int ipif_count;
606 krwlock_t ipif_hash_lock;
607 } sctp_ipif_hash_t;
608
609
610 /*
611 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is
612 * either sctp_slow_start_initial or sctp_slow_start_after idle
613 * depending on the caller.
614 */
615 #define SET_CWND(fp, mss, def_max_init_cwnd) \
616 { \
617 (fp)->sf_cwnd = MIN(def_max_init_cwnd * (mss), \
618 MIN(4 * (mss), MAX(2 * (mss), 4380 / (mss) * (mss)))); \
619 }
620
621
622 struct sctp_s;
623
624 /*
625 * Control structure for each open SCTP stream,
626 * defined only within the kernel or for a kmem user.
627 * NOTE: sctp_reinit_values MUST have a line for each field in this structure!
628 */
629 #if (defined(_KERNEL) || defined(_KMEMUSER))
630
631 typedef struct sctp_s {
632
633 /*
634 * The following is shared with (and duplicated) in IP, so if you
635 * make changes, make sure you also change things in ip_sctp.c.
636 */
637 struct sctp_s *sctp_conn_hash_next;
638 struct sctp_s *sctp_conn_hash_prev;
639
640 struct sctp_s *sctp_listen_hash_next;
641 struct sctp_s *sctp_listen_hash_prev;
642
643 sctp_tf_t *sctp_listen_tfp; /* Ptr to tf */
644 sctp_tf_t *sctp_conn_tfp; /* Ptr to tf */
645
646 /* Global list of sctp */
647 list_node_t sctp_list;
648
649 sctp_faddr_t *sctp_faddrs;
650 int sctp_nfaddrs;
651 sctp_ipif_hash_t sctp_saddrs[SCTP_IPIF_HASH];
652 int sctp_nsaddrs;
653
654 kmutex_t sctp_lock;
655 kcondvar_t sctp_cv;
656 boolean_t sctp_running;
657
658 #define sctp_ulpd sctp_connp->conn_upper_handle
659 #define sctp_upcalls sctp_connp->conn_upcalls
660
661 #define sctp_ulp_newconn sctp_upcalls->su_newconn
662 #define sctp_ulp_connected sctp_upcalls->su_connected
663 #define sctp_ulp_disconnected sctp_upcalls->su_disconnected
664 #define sctp_ulp_opctl sctp_upcalls->su_opctl
665 #define sctp_ulp_recv sctp_upcalls->su_recv
666 #define sctp_ulp_txq_full sctp_upcalls->su_txq_full
667 #define sctp_ulp_prop sctp_upcalls->su_set_proto_props
668
669 int32_t sctp_state;
670
671 conn_t *sctp_connp; /* conn_t stuff */
672 sctp_stack_t *sctp_sctps;
673
674 /* Peer address tracking */
675 sctp_faddr_t *sctp_lastfaddr; /* last faddr in list */
676 sctp_faddr_t *sctp_primary; /* primary faddr */
677 sctp_faddr_t *sctp_current; /* current faddr */
678 sctp_faddr_t *sctp_lastdata; /* last data seen from this */
679
680 /* Outbound data tracking */
681 mblk_t *sctp_xmit_head;
682 mblk_t *sctp_xmit_tail;
683 mblk_t *sctp_xmit_unsent;
684 mblk_t *sctp_xmit_unsent_tail;
685 mblk_t *sctp_xmit_unacked;
686
687 int32_t sctp_unacked; /* # of unacked bytes */
688 int32_t sctp_unsent; /* # of unsent bytes in hand */
689
690 uint32_t sctp_ltsn; /* Local instance TSN */
691 uint32_t sctp_lastack_rxd; /* Last rx'd cumtsn */
692 uint32_t sctp_recovery_tsn; /* Exit from fast recovery */
693 uint32_t sctp_adv_pap; /* Adv. Peer Ack Point */
694
695 uint16_t sctp_num_ostr;
696 uint16_t *sctp_ostrcntrs;
697
698 mblk_t *sctp_pad_mp; /* pad unaligned data chunks */
699
700 /* sendmsg() default parameters */
701 uint16_t sctp_def_stream; /* default stream id */
702 uint16_t sctp_def_flags; /* default xmit flags */
703 uint32_t sctp_def_ppid; /* default payload id */
704 uint32_t sctp_def_context; /* default context */
705 uint32_t sctp_def_timetolive; /* default msg TTL */
706
707 /* Inbound data tracking */
708 sctp_set_t *sctp_sack_info; /* Sack tracking */
709 mblk_t *sctp_ack_mp; /* Delayed ACK timer block */
710 sctp_instr_t *sctp_instr; /* Instream trackers */
711 mblk_t *sctp_uo_frags; /* Un-ordered msg. fragments */
712 uint32_t sctp_ftsn; /* Peer's TSN */
713 uint32_t sctp_lastacked; /* last cumtsn SACKd */
714 uint16_t sctp_num_istr; /* No. of instreams */
715 int32_t sctp_istr_nmsgs; /* No. of chunks in instreams */
716 int32_t sctp_sack_gaps; /* No. of received gaps */
717 int32_t sctp_sack_toggle; /* SACK every other pkt */
718
719 /* RTT calculation */
720 uint32_t sctp_rtt_tsn;
721 int64_t sctp_out_time;
722
723 /* Stats can be reset by snmp users kstat, netstat and snmp agents */
724 uint64_t sctp_opkts; /* sent pkts */
725 uint64_t sctp_obchunks; /* sent control chunks */
726 uint64_t sctp_odchunks; /* sent ordered data chunks */
727 uint64_t sctp_oudchunks; /* sent unord data chunks */
728 uint64_t sctp_rxtchunks; /* retransmitted chunks */
729 uint64_t sctp_ipkts; /* recv pkts */
730 uint64_t sctp_ibchunks; /* recv control chunks */
731 uint64_t sctp_idchunks; /* recv ordered data chunks */
732 uint64_t sctp_iudchunks; /* recv unord data chunks */
733 uint64_t sctp_fragdmsgs;
734 uint64_t sctp_reassmsgs;
735 uint32_t sctp_T1expire; /* # of times T1timer expired */
736 uint32_t sctp_T2expire; /* # of times T2timer expired */
737 uint32_t sctp_T3expire; /* # of times T3timer expired */
738 uint32_t sctp_assoc_start_time; /* time when assoc was est. */
739
740 uint32_t sctp_frwnd; /* Peer RWND */
741 uint32_t sctp_cwnd_max;
742
743 /* Inbound flow control */
744 int32_t sctp_rwnd; /* Current receive window */
745 int32_t sctp_arwnd; /* Last advertised window */
746 int32_t sctp_rxqueued; /* No. of bytes in RX q's */
747 int32_t sctp_ulp_rxqueued; /* Data in ULP */
748
749 /* Pre-initialized composite headers */
750 uchar_t *sctp_iphc; /* v4 sctp/ip hdr template buffer */
751 uchar_t *sctp_iphc6; /* v6 sctp/ip hdr template buffer */
752
753 int32_t sctp_iphc_len; /* actual allocated v4 buffer size */
754 int32_t sctp_iphc6_len; /* actual allocated v6 buffer size */
755
756 int32_t sctp_hdr_len; /* len of combined SCTP/IP v4 hdr */
757 int32_t sctp_hdr6_len; /* len of combined SCTP/IP v6 hdr */
758
759 ipha_t *sctp_ipha; /* IPv4 header in the buffer */
760 ip6_t *sctp_ip6h; /* IPv6 header in the buffer */
761
762 int32_t sctp_ip_hdr_len; /* Byte len of our current v4 hdr */
763 int32_t sctp_ip_hdr6_len; /* Byte len of our current v6 hdr */
764
765 sctp_hdr_t *sctp_sctph; /* sctp header in combined v4 hdr */
766 sctp_hdr_t *sctp_sctph6; /* sctp header in combined v6 hdr */
767
768 uint32_t sctp_lvtag; /* local SCTP instance verf tag */
769 uint32_t sctp_fvtag; /* Peer's SCTP verf tag */
770
771 /* Path MTU Discovery */
772 int64_t sctp_last_mtu_probe;
773 clock_t sctp_mtu_probe_intvl;
774 uint32_t sctp_mss; /* Max send size (not TCP MSS!) */
775
776 /* structs sctp_bits, sctp_events are for clearing all bits at once */
777 struct {
778 uint32_t
779
780 sctp_understands_asconf : 1, /* Peer handles ASCONF chunks */
781 sctp_cchunk_pend : 1, /* Control chunk in flight. */
782 sctp_lingering : 1, /* Lingering in close */
783 sctp_loopback: 1, /* src and dst are the same machine */
784
785 sctp_force_sack : 1,
786 sctp_ack_timer_running: 1, /* Delayed ACK timer running */
787 sctp_hwcksum : 1, /* The NIC is capable of hwcksum */
788 sctp_understands_addip : 1,
789
790 sctp_bound_to_all : 1,
791 sctp_cansleep : 1, /* itf routines can sleep */
792 sctp_detached : 1, /* If we're detached from a stream */
793 sctp_send_adaptation : 1, /* send adaptation layer ind */
794
795 sctp_recv_adaptation : 1, /* recv adaptation layer ind */
796 sctp_ndelay : 1, /* turn off Nagle */
797 sctp_condemned : 1, /* this sctp is about to disappear */
798 sctp_chk_fast_rexmit : 1, /* check for fast rexmit message */
799
800 sctp_prsctp_aware : 1, /* is peer PR-SCTP aware? */
801 sctp_linklocal : 1, /* is linklocal assoc. */
802 sctp_rexmitting : 1, /* SCTP is retransmitting */
803 sctp_zero_win_probe : 1, /* doing zero win probe */
804
805 sctp_txq_full : 1, /* the tx queue is full */
806 sctp_ulp_discon_done : 1, /* ulp_disconnecting done */
807 sctp_flowctrld : 1, /* upper layer flow controlled */
808 sctp_dummy : 5;
809 } sctp_bits;
810 struct {
811 uint32_t
812
813 sctp_recvsndrcvinfo : 1,
814 sctp_recvassocevnt : 1,
815 sctp_recvpathevnt : 1,
816 sctp_recvsendfailevnt : 1,
817
818 sctp_recvpeererr : 1,
819 sctp_recvshutdownevnt : 1,
820 sctp_recvpdevnt : 1,
821 sctp_recvalevnt : 1;
822 } sctp_events;
823 #define sctp_priv_stream sctp_bits.sctp_priv_stream
824 #define sctp_understands_asconf sctp_bits.sctp_understands_asconf
825 #define sctp_cchunk_pend sctp_bits.sctp_cchunk_pend
826 #define sctp_lingering sctp_bits.sctp_lingering
827 #define sctp_loopback sctp_bits.sctp_loopback
828 #define sctp_force_sack sctp_bits.sctp_force_sack
829 #define sctp_ack_timer_running sctp_bits.sctp_ack_timer_running
830 #define sctp_hwcksum sctp_bits.sctp_hwcksum
831 #define sctp_understands_addip sctp_bits.sctp_understands_addip
832 #define sctp_bound_to_all sctp_bits.sctp_bound_to_all
833 #define sctp_cansleep sctp_bits.sctp_cansleep
834 #define sctp_detached sctp_bits.sctp_detached
835 #define sctp_send_adaptation sctp_bits.sctp_send_adaptation
836 #define sctp_recv_adaptation sctp_bits.sctp_recv_adaptation
837 #define sctp_ndelay sctp_bits.sctp_ndelay
838 #define sctp_condemned sctp_bits.sctp_condemned
839 #define sctp_chk_fast_rexmit sctp_bits.sctp_chk_fast_rexmit
840 #define sctp_prsctp_aware sctp_bits.sctp_prsctp_aware
841 #define sctp_linklocal sctp_bits.sctp_linklocal
842 #define sctp_rexmitting sctp_bits.sctp_rexmitting
843 #define sctp_zero_win_probe sctp_bits.sctp_zero_win_probe
844 #define sctp_txq_full sctp_bits.sctp_txq_full
845 #define sctp_ulp_discon_done sctp_bits.sctp_ulp_discon_done
846 #define sctp_flowctrld sctp_bits.sctp_flowctrld
847
848 #define sctp_recvsndrcvinfo sctp_events.sctp_recvsndrcvinfo
849 #define sctp_recvassocevnt sctp_events.sctp_recvassocevnt
850 #define sctp_recvpathevnt sctp_events.sctp_recvpathevnt
851 #define sctp_recvsendfailevnt sctp_events.sctp_recvsendfailevnt
852 #define sctp_recvpeererr sctp_events.sctp_recvpeererr
853 #define sctp_recvshutdownevnt sctp_events.sctp_recvshutdownevnt
854 #define sctp_recvpdevnt sctp_events.sctp_recvpdevnt
855 #define sctp_recvalevnt sctp_events.sctp_recvalevnt
856
857 /* Retransmit info */
858 mblk_t *sctp_cookie_mp; /* cookie chunk, if rxt needed */
859 int32_t sctp_strikes; /* Total number of assoc strikes */
860 int32_t sctp_max_init_rxt;
861 int32_t sctp_pa_max_rxt; /* Max per-assoc retransmit cnt */
862 int32_t sctp_pp_max_rxt; /* Max per-path retransmit cnt */
863 uint32_t sctp_rto_max;
864 uint32_t sctp_rto_max_init;
865 uint32_t sctp_rto_min;
866 uint32_t sctp_rto_initial;
867
868 int64_t sctp_last_secret_update;
869 uint8_t sctp_secret[SCTP_SECRET_LEN]; /* for cookie auth */
870 uint8_t sctp_old_secret[SCTP_SECRET_LEN];
871 uint32_t sctp_cookie_lifetime; /* cookie lifetime in tick */
872
873 /* Bind hash tables */
874 kmutex_t *sctp_bind_lockp; /* Ptr to tf_lock */
875 struct sctp_s *sctp_bind_hash;
876 struct sctp_s **sctp_ptpbhn;
877
878 /* Shutdown / cleanup */
879 sctp_faddr_t *sctp_shutdown_faddr; /* rotate faddr during shutd */
880 int32_t sctp_client_errno; /* How the client screwed up */
881 kmutex_t sctp_reflock; /* Protects sctp_refcnt & timer mp */
882 ushort_t sctp_refcnt; /* No. of pending upstream msg */
883 mblk_t *sctp_timer_mp; /* List of fired timers. */
884
885 mblk_t *sctp_heartbeat_mp; /* Timer block for heartbeats */
886 uint32_t sctp_hb_interval; /* Default hb_interval */
887
888 int32_t sctp_autoclose; /* Auto disconnect in ticks */
889 int64_t sctp_active; /* Last time data/sack on this conn */
890 uint32_t sctp_tx_adaptation_code; /* TX adaptation code */
891 uint32_t sctp_rx_adaptation_code; /* RX adaptation code */
892
893 /* Reliable control chunks */
894 mblk_t *sctp_cxmit_list; /* Xmit list for control chunks */
895 uint32_t sctp_lcsn; /* Our serial number */
896 uint32_t sctp_fcsn; /* Peer serial number */
897
898 /* Per association receive queue */
899 kmutex_t sctp_recvq_lock;
900 mblk_t *sctp_recvq;
901 mblk_t *sctp_recvq_tail;
902 taskq_t *sctp_recvq_tq;
903
904 /* IPv6 ancillary data */
905 uint_t sctp_recvifindex; /* last rcvd IPV6_RCVPKTINFO */
906 uint_t sctp_recvhops; /* " IPV6_RECVHOPLIMIT */
907 uint_t sctp_recvtclass; /* " IPV6_RECVTCLASS */
908 ip6_hbh_t *sctp_hopopts; /* " IPV6_RECVHOPOPTS */
909 ip6_dest_t *sctp_dstopts; /* " IPV6_RECVDSTOPTS */
910 ip6_dest_t *sctp_rthdrdstopts; /* " IPV6_RECVRTHDRDSTOPTS */
911 ip6_rthdr_t *sctp_rthdr; /* " IPV6_RECVRTHDR */
912 uint_t sctp_hopoptslen;
913 uint_t sctp_dstoptslen;
914 uint_t sctp_rthdrdstoptslen;
915 uint_t sctp_rthdrlen;
916
917 /* Stats */
918 uint64_t sctp_msgcount;
919 uint64_t sctp_prsctpdrop;
920
921 uint_t sctp_v4label_len; /* length of cached v4 label */
922 uint_t sctp_v6label_len; /* length of cached v6 label */
923 uint32_t sctp_rxt_nxttsn; /* Next TSN to be rexmitted */
924 uint32_t sctp_rxt_maxtsn; /* Max TSN sent at time out */
925
926 int sctp_pd_point; /* Partial delivery point */
927 mblk_t *sctp_err_chunks; /* Error chunks */
928 uint32_t sctp_err_len; /* Total error chunks length */
929
930 /* additional source data for per endpoint association statistics */
931 uint64_t sctp_outseqtsns; /* TSN rx > expected TSN */
932 uint64_t sctp_osacks; /* total sacks sent */
933 uint64_t sctp_isacks; /* total sacks received */
934 uint64_t sctp_idupchunks; /* rx dups, ord or unord */
935 uint64_t sctp_gapcnt; /* total gap acks rx */
936 /*
937 * Add the current data from the counters which are reset by snmp
938 * to these cumulative counters to use in per endpoint statistics.
939 */
940 uint64_t sctp_cum_obchunks; /* sent control chunks */
941 uint64_t sctp_cum_odchunks; /* sent ordered data chunks */
942 uint64_t sctp_cum_oudchunks; /* sent unord data chunks */
943 uint64_t sctp_cum_rxtchunks; /* retransmitted chunks */
944 uint64_t sctp_cum_ibchunks; /* recv control chunks */
945 uint64_t sctp_cum_idchunks; /* recv ordered data chunks */
946 uint64_t sctp_cum_iudchunks; /* recv unord data chunks */
947
948 /*
949 * When non-zero, this is the maximum observed RTO since assoc stats
950 * were last requested. When zero, no RTO update has occurred since
951 * the previous user request for stats on this endpoint.
952 */
953 int sctp_maxrto;
954 /*
955 * The stored value of sctp_maxrto passed to user during the previous
956 * user request for stats on this endpoint.
957 */
958 int sctp_prev_maxrto;
959
960 /* For association counting. */
961 sctp_listen_cnt_t *sctp_listen_cnt;
962 } sctp_t;
963
964 #define SCTP_TXQ_LEN(sctp) ((sctp)->sctp_unsent + (sctp)->sctp_unacked)
965 #define SCTP_TXQ_UPDATE(sctp) \
966 if ((sctp)->sctp_txq_full && SCTP_TXQ_LEN(sctp) <= \
967 (sctp)->sctp_connp->conn_sndlowat) { \
968 (sctp)->sctp_txq_full = 0; \
969 (sctp)->sctp_ulp_txq_full((sctp)->sctp_ulpd, \
970 B_FALSE); \
971 }
972
973 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */
974
975 extern void sctp_ack_timer(sctp_t *);
976 extern size_t sctp_adaptation_code_param(sctp_t *, uchar_t *);
977 extern void sctp_adaptation_event(sctp_t *);
978 extern void sctp_add_err(sctp_t *, uint16_t, void *, size_t,
979 sctp_faddr_t *);
980 extern int sctp_add_faddr(sctp_t *, in6_addr_t *, int, boolean_t);
981 extern boolean_t sctp_add_ftsn_set(sctp_ftsn_set_t **, sctp_faddr_t *, mblk_t *,
982 uint_t *, uint32_t *);
983 extern void sctp_add_recvq(sctp_t *, mblk_t *, boolean_t,
984 ip_recv_attr_t *);
985 extern void sctp_add_unrec_parm(sctp_parm_hdr_t *, mblk_t **, boolean_t);
986 extern size_t sctp_addr_params(sctp_t *, int, uchar_t *, boolean_t);
987 extern mblk_t *sctp_add_proto_hdr(sctp_t *, sctp_faddr_t *, mblk_t *, int,
988 int *);
989 extern void sctp_addr_req(sctp_t *, mblk_t *);
990 extern sctp_t *sctp_addrlist2sctp(mblk_t *, sctp_hdr_t *, sctp_chunk_hdr_t *,
991 zoneid_t, sctp_stack_t *);
992 extern void sctp_check_adv_ack_pt(sctp_t *, mblk_t *, mblk_t *);
993 extern void sctp_assoc_event(sctp_t *, uint16_t, uint16_t,
994 sctp_chunk_hdr_t *);
995
996 extern void sctp_bind_hash_insert(sctp_tf_t *, sctp_t *, int);
997 extern void sctp_bind_hash_remove(sctp_t *);
998 extern int sctp_bindi(sctp_t *, in_port_t, boolean_t, int, in_port_t *);
999 extern int sctp_bind_add(sctp_t *, const void *, uint32_t, boolean_t,
1000 in_port_t);
1001 extern int sctp_bind_del(sctp_t *, const void *, uint32_t, boolean_t);
1002 extern int sctp_build_hdrs(sctp_t *, int);
1003
1004 extern int sctp_check_abandoned_msg(sctp_t *, mblk_t *);
1005 extern void sctp_clean_death(sctp_t *, int);
1006 extern void sctp_close_eager(sctp_t *);
1007 extern int sctp_compare_faddrsets(sctp_faddr_t *, sctp_faddr_t *);
1008 extern void sctp_congest_reset(sctp_t *);
1009 extern void sctp_conn_hash_insert(sctp_tf_t *, sctp_t *, int);
1010 extern void sctp_conn_hash_remove(sctp_t *);
1011 extern void sctp_conn_init(conn_t *);
1012 extern sctp_t *sctp_conn_match(in6_addr_t **, uint32_t, in6_addr_t *,
1013 uint32_t, zoneid_t, iaflags_t, sctp_stack_t *);
1014 extern void sctp_conn_reclaim(void *);
1015 extern sctp_t *sctp_conn_request(sctp_t *, mblk_t *, uint_t, uint_t,
1016 sctp_init_chunk_t *, ip_recv_attr_t *);
1017 extern uint32_t sctp_cumack(sctp_t *, uint32_t, mblk_t **);
1018 extern sctp_t *sctp_create_eager(sctp_t *);
1019
1020 extern void sctp_dispatch_rput(queue_t *, sctp_t *, sctp_hdr_t *, mblk_t *,
1021 uint_t, uint_t, in6_addr_t);
1022 extern char *sctp_display(sctp_t *, char *);
1023 extern void sctp_display_all(sctp_stack_t *);
1024
1025 extern void sctp_error_event(sctp_t *, sctp_chunk_hdr_t *, boolean_t);
1026
1027 extern void sctp_faddr_alive(sctp_t *, sctp_faddr_t *);
1028 extern int sctp_faddr_dead(sctp_t *, sctp_faddr_t *, int);
1029 extern void sctp_faddr_fini(void);
1030 extern void sctp_faddr_init(void);
1031 extern void sctp_fast_rexmit(sctp_t *);
1032 extern void sctp_fill_sack(sctp_t *, unsigned char *, int);
1033 extern uint32_t sctp_find_listener_conf(sctp_stack_t *, in_port_t);
1034 extern void sctp_free_faddr_timers(sctp_t *);
1035 extern void sctp_free_ftsn_set(sctp_ftsn_set_t *);
1036 extern void sctp_free_msg(mblk_t *);
1037 extern void sctp_free_reass(sctp_instr_t *);
1038 extern void sctp_free_set(sctp_set_t *);
1039 extern void sctp_ftsn_sets_fini(void);
1040 extern void sctp_ftsn_sets_init(void);
1041
1042 extern int sctp_get_addrlist(sctp_t *, const void *, uint32_t *,
1043 uchar_t **, int *, size_t *);
1044 extern int sctp_get_addrparams(sctp_t *, sctp_t *, mblk_t *,
1045 sctp_chunk_hdr_t *, uint_t *);
1046 extern void sctp_get_dest(sctp_t *, sctp_faddr_t *);
1047 extern void sctp_get_faddr_list(sctp_t *, uchar_t *, size_t);
1048 extern mblk_t *sctp_get_first_sent(sctp_t *);
1049 extern mblk_t *sctp_get_msg_to_send(sctp_t *, mblk_t **, mblk_t *, int *,
1050 int32_t, uint32_t, sctp_faddr_t *);
1051 extern void sctp_get_saddr_list(sctp_t *, uchar_t *, size_t);
1052
1053 extern int sctp_handle_error(sctp_t *, sctp_hdr_t *, sctp_chunk_hdr_t *,
1054 mblk_t *, ip_recv_attr_t *);
1055 extern void sctp_hash_destroy(sctp_stack_t *);
1056 extern void sctp_hash_init(sctp_stack_t *);
1057 extern void sctp_heartbeat_timer(sctp_t *);
1058
1059 extern void sctp_icmp_error(sctp_t *, mblk_t *);
1060 extern void sctp_inc_taskq(sctp_stack_t *);
1061 extern void sctp_info_req(sctp_t *, mblk_t *);
1062 extern mblk_t *sctp_init_mp(sctp_t *, sctp_faddr_t *);
1063 extern boolean_t sctp_initialize_params(sctp_t *, sctp_init_chunk_t *,
1064 sctp_init_chunk_t *);
1065 extern uint32_t sctp_init2vtag(sctp_chunk_hdr_t *);
1066 extern void sctp_intf_event(sctp_t *, in6_addr_t, int, int);
1067 extern void sctp_input_data(sctp_t *, mblk_t *, ip_recv_attr_t *);
1068 extern void sctp_instream_cleanup(sctp_t *, boolean_t);
1069 extern boolean_t sctp_is_a_faddr_clean(sctp_t *);
1070
1071 extern void *sctp_kstat_init(netstackid_t);
1072 extern void sctp_kstat_fini(netstackid_t, kstat_t *);
1073 extern void *sctp_kstat2_init(netstackid_t);
1074 extern void sctp_kstat2_fini(netstackid_t, kstat_t *);
1075
1076 extern ssize_t sctp_link_abort(mblk_t *, uint16_t, char *, size_t, int,
1077 boolean_t);
1078 extern void sctp_listen_hash_insert(sctp_tf_t *, sctp_t *);
1079 extern void sctp_listen_hash_remove(sctp_t *);
1080 extern void sctp_listener_conf_cleanup(sctp_stack_t *);
1081 extern sctp_t *sctp_lookup(sctp_t *, in6_addr_t *, sctp_tf_t *, uint32_t *,
1082 int);
1083 extern sctp_faddr_t *sctp_lookup_faddr(sctp_t *, in6_addr_t *);
1084
1085 extern mblk_t *sctp_make_err(sctp_t *, uint16_t, void *, size_t);
1086 extern mblk_t *sctp_make_ftsn_chunk(sctp_t *, sctp_faddr_t *,
1087 sctp_ftsn_set_t *, uint_t, uint32_t);
1088 extern void sctp_make_ftsns(sctp_t *, mblk_t *, mblk_t *, mblk_t **,
1089 sctp_faddr_t *, uint32_t *);
1090 extern mblk_t *sctp_make_mp(sctp_t *, sctp_faddr_t *, int);
1091 extern mblk_t *sctp_make_sack(sctp_t *, sctp_faddr_t *, mblk_t *);
1092 extern void sctp_maxpsz_set(sctp_t *);
1093 extern void sctp_move_faddr_timers(queue_t *, sctp_t *);
1094
1095 extern sctp_parm_hdr_t *sctp_next_parm(sctp_parm_hdr_t *, ssize_t *);
1096
1097 extern void sctp_ootb_shutdown_ack(mblk_t *, uint_t, ip_recv_attr_t *,
1098 ip_stack_t *);
1099 extern size_t sctp_options_param(const sctp_t *, void *, int);
1100 extern size_t sctp_options_param_len(const sctp_t *, int);
1101 extern void sctp_output(sctp_t *, uint_t);
1102
1103 extern void sctp_partial_delivery_event(sctp_t *);
1104 extern int sctp_process_cookie(sctp_t *, sctp_chunk_hdr_t *, mblk_t *,
1105 sctp_init_chunk_t **, sctp_hdr_t *, int *, in6_addr_t *,
1106 ip_recv_attr_t *);
1107 extern void sctp_process_err(sctp_t *);
1108 extern void sctp_process_heartbeat(sctp_t *, sctp_chunk_hdr_t *);
1109 extern void sctp_process_timer(sctp_t *);
1110
1111 extern void sctp_redo_faddr_srcs(sctp_t *);
1112 extern void sctp_regift_xmitlist(sctp_t *);
1113 extern void sctp_return_heartbeat(sctp_t *, sctp_chunk_hdr_t *, mblk_t *);
1114 extern void sctp_rexmit(sctp_t *, sctp_faddr_t *);
1115 extern mblk_t *sctp_rexmit_packet(sctp_t *, mblk_t **, mblk_t **,
1116 sctp_faddr_t *, uint_t *);
1117 extern void sctp_rexmit_timer(sctp_t *, sctp_faddr_t *);
1118 extern sctp_faddr_t *sctp_rotate_faddr(sctp_t *, sctp_faddr_t *);
1119
1120 extern boolean_t sctp_sack(sctp_t *, mblk_t *);
1121 extern int sctp_secure_restart_check(mblk_t *, sctp_chunk_hdr_t *,
1122 uint32_t, int, sctp_stack_t *, ip_recv_attr_t *);
1123 extern void sctp_send_abort(sctp_t *, uint32_t, uint16_t, char *, size_t,
1124 mblk_t *, int, boolean_t, ip_recv_attr_t *);
1125 extern void sctp_ootb_send_abort(uint32_t, uint16_t, char *, size_t,
1126 const mblk_t *, int, boolean_t, ip_recv_attr_t *,
1127 ip_stack_t *);
1128 extern void sctp_send_cookie_ack(sctp_t *);
1129 extern void sctp_send_cookie_echo(sctp_t *, sctp_chunk_hdr_t *, mblk_t *,
1130 ip_recv_attr_t *);
1131 extern void sctp_send_initack(sctp_t *, sctp_hdr_t *, sctp_chunk_hdr_t *,
1132 mblk_t *, ip_recv_attr_t *);
1133 extern void sctp_send_shutdown(sctp_t *, int);
1134 extern void sctp_send_heartbeat(sctp_t *, sctp_faddr_t *);
1135 extern void sctp_sendfail_event(sctp_t *, mblk_t *, int, boolean_t);
1136 extern void sctp_set_faddr_current(sctp_t *, sctp_faddr_t *);
1137 extern int sctp_set_hdraddrs(sctp_t *);
1138 extern void sctp_set_saddr(sctp_t *, sctp_faddr_t *);
1139 extern void sctp_sets_init(void);
1140 extern void sctp_sets_fini(void);
1141 extern void sctp_shutdown_event(sctp_t *);
1142 extern void sctp_stop_faddr_timers(sctp_t *);
1143 extern int sctp_shutdown_received(sctp_t *, sctp_chunk_hdr_t *, boolean_t,
1144 boolean_t, sctp_faddr_t *);
1145 extern void sctp_shutdown_complete(sctp_t *);
1146 extern void sctp_set_if_mtu(sctp_t *);
1147 extern void sctp_set_iplen(sctp_t *, mblk_t *, ip_xmit_attr_t *);
1148 extern void sctp_set_ulp_prop(sctp_t *);
1149 extern void sctp_ss_rexmit(sctp_t *);
1150 extern void sctp_stack_cpu_add(sctp_stack_t *, processorid_t);
1151 extern size_t sctp_supaddr_param_len(sctp_t *);
1152 extern size_t sctp_supaddr_param(sctp_t *, uchar_t *);
1153
1154 extern void sctp_timer(sctp_t *, mblk_t *, clock_t);
1155 extern mblk_t *sctp_timer_alloc(sctp_t *, pfv_t, int);
1156 extern void sctp_timer_call(sctp_t *sctp, mblk_t *);
1157 extern void sctp_timer_free(mblk_t *);
1158 extern void sctp_timer_stop(mblk_t *);
1159 extern void sctp_unlink_faddr(sctp_t *, sctp_faddr_t *);
1160
1161 extern void sctp_update_dce(sctp_t *sctp);
1162 extern in_port_t sctp_update_next_port(in_port_t, zone_t *zone, sctp_stack_t *);
1163 extern void sctp_update_rtt(sctp_t *, sctp_faddr_t *, clock_t);
1164 extern void sctp_user_abort(sctp_t *, mblk_t *);
1165
1166 extern void sctp_validate_peer(sctp_t *);
1167
1168 extern int sctp_xmit_list_clean(sctp_t *, ssize_t);
1169
1170 extern void sctp_zap_addrs(sctp_t *);
1171 extern void sctp_zap_faddrs(sctp_t *, int);
1172 extern sctp_chunk_hdr_t *sctp_first_chunk(uchar_t *, ssize_t);
1173 extern void sctp_send_shutdown_ack(sctp_t *, sctp_faddr_t *, boolean_t);
1174
1175 /* Contract private interface between SCTP and Clustering - PSARC/2005/602 */
1176
1177 extern void (*cl_sctp_listen)(sa_family_t, uchar_t *, uint_t, in_port_t);
1178 extern void (*cl_sctp_unlisten)(sa_family_t, uchar_t *, uint_t, in_port_t);
1179 extern void (*cl_sctp_connect)(sa_family_t, uchar_t *, uint_t, in_port_t,
1180 uchar_t *, uint_t, in_port_t, boolean_t, cl_sctp_handle_t);
1181 extern void (*cl_sctp_disconnect)(sa_family_t, cl_sctp_handle_t);
1182 extern void (*cl_sctp_assoc_change)(sa_family_t, uchar_t *, size_t, uint_t,
1183 uchar_t *, size_t, uint_t, int, cl_sctp_handle_t);
1184 extern void (*cl_sctp_check_addrs)(sa_family_t, in_port_t, uchar_t **,
1185 size_t, uint_t *, boolean_t);
1186
1187 #define RUN_SCTP(sctp) \
1188 { \
1189 mutex_enter(&(sctp)->sctp_lock); \
1190 while ((sctp)->sctp_running) \
1191 cv_wait(&(sctp)->sctp_cv, &(sctp)->sctp_lock); \
1192 (sctp)->sctp_running = B_TRUE; \
1193 mutex_exit(&(sctp)->sctp_lock); \
1194 }
1195
1196 /* Wake up recvq taskq */
1197 #define WAKE_SCTP(sctp) \
1198 { \
1199 mutex_enter(&(sctp)->sctp_lock); \
1200 if ((sctp)->sctp_timer_mp != NULL) \
1201 sctp_process_timer(sctp); \
1202 (sctp)->sctp_running = B_FALSE; \
1203 cv_broadcast(&(sctp)->sctp_cv); \
1204 mutex_exit(&(sctp)->sctp_lock); \
1205 }
1206
1207 #ifdef __cplusplus
1208 }
1209 #endif
1210
1211 #endif /* _INET_SCTP_SCTP_IMPL_H */