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 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _INET_SCTP_SCTP_IMPL_H 28 #define _INET_SCTP_SCTP_IMPL_H 29 30 #include <sys/inttypes.h> 31 #include <sys/taskq.h> 32 #include <sys/list.h> 33 #include <sys/strsun.h> 34 #include <sys/zone.h> 35 #include <netinet/ip6.h> 36 #include <inet/optcom.h> 37 #include <inet/tunables.h> 38 #include <netinet/sctp.h> 39 #include <inet/sctp_itf.h> 40 #include "sctp_stack.h" 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 /* Streams device identifying info and version */ 47 #define SCTP_DEV_IDINFO "SCTP Streams device 1.0" 48 49 #define SSN_GT(a, b) ((int16_t)((a)-(b)) > 0) 50 #define SSN_GE(a, b) ((int16_t)((a)-(b)) >= 0) 51 52 /* Default buffer size and flow control wake up threshold. */ 53 #define SCTP_XMIT_LOWATER 8192 54 #define SCTP_XMIT_HIWATER 102400 55 #define SCTP_RECV_LOWATER 8192 56 #define SCTP_RECV_HIWATER 102400 57 58 /* SCTP Timer control structure */ 59 typedef struct sctpt_s { 60 pfv_t sctpt_pfv; /* The routine we are to call */ 61 struct sctp_s *sctpt_sctp; /* The parameter we are to pass in */ 62 struct sctp_faddr_s *sctpt_faddr; 63 } sctpt_t; 64 65 /* 66 * Maximum number of duplicate TSNs we can report. This is currently 67 * static, and governs the size of the mblk used to hold the duplicate 68 * reports. The use of duplcate TSN reports is currently experimental, 69 * so for now a static limit should suffice. 70 */ 71 #define SCTP_DUP_MBLK_SZ 64 72 73 #define SCTP_IS_ADDR_UNSPEC(isv4, addr) \ 74 ((isv4) ? IN6_IS_ADDR_V4MAPPED_ANY(&(addr)) : \ 75 IN6_IS_ADDR_UNSPECIFIED(&(addr))) 76 77 /* 78 * SCTP properties/tunables 79 */ 80 #define sctps_max_init_retr sctps_propinfo_tbl[0].prop_cur_uval 81 #define sctps_max_init_retr_high sctps_propinfo_tbl[0].prop_max_uval 82 #define sctps_max_init_retr_low sctps_propinfo_tbl[0].prop_min_uval 83 #define sctps_pa_max_retr sctps_propinfo_tbl[1].prop_cur_uval 84 #define sctps_pa_max_retr_high sctps_propinfo_tbl[1].prop_max_uval 85 #define sctps_pa_max_retr_low sctps_propinfo_tbl[1].prop_min_uval 86 #define sctps_pp_max_retr sctps_propinfo_tbl[2].prop_cur_uval 87 #define sctps_pp_max_retr_high sctps_propinfo_tbl[2].prop_max_uval 88 #define sctps_pp_max_retr_low sctps_propinfo_tbl[2].prop_min_uval 89 #define sctps_cwnd_max_ sctps_propinfo_tbl[3].prop_cur_uval 90 #define sctps_smallest_nonpriv_port sctps_propinfo_tbl[4].prop_cur_uval 91 #define sctps_ipv4_ttl sctps_propinfo_tbl[5].prop_cur_uval 92 #define sctps_heartbeat_interval sctps_propinfo_tbl[6].prop_cur_uval 93 #define sctps_heartbeat_interval_high sctps_propinfo_tbl[6].prop_max_uval 94 #define sctps_heartbeat_interval_low sctps_propinfo_tbl[6].prop_min_uval 95 #define sctps_initial_mtu sctps_propinfo_tbl[7].prop_cur_uval 96 #define sctps_mtu_probe_interval sctps_propinfo_tbl[8].prop_cur_uval 97 #define sctps_new_secret_interval sctps_propinfo_tbl[9].prop_cur_uval 98 #define sctps_deferred_ack_interval sctps_propinfo_tbl[10].prop_cur_uval 99 #define sctps_snd_lowat_fraction sctps_propinfo_tbl[11].prop_cur_uval 100 #define sctps_ignore_path_mtu sctps_propinfo_tbl[12].prop_cur_bval 101 #define sctps_initial_ssthresh sctps_propinfo_tbl[13].prop_cur_uval 102 #define sctps_smallest_anon_port sctps_propinfo_tbl[14].prop_cur_uval 103 #define sctps_largest_anon_port sctps_propinfo_tbl[15].prop_cur_uval 104 #define sctps_xmit_hiwat sctps_propinfo_tbl[16].prop_cur_uval 105 #define sctps_xmit_lowat sctps_propinfo_tbl[17].prop_cur_uval 106 #define sctps_recv_hiwat sctps_propinfo_tbl[18].prop_cur_uval 107 #define sctps_max_buf sctps_propinfo_tbl[19].prop_cur_uval 108 #define sctps_rtt_updates sctps_propinfo_tbl[20].prop_cur_uval 109 #define sctps_ipv6_hoplimit sctps_propinfo_tbl[21].prop_cur_uval 110 #define sctps_rto_ming sctps_propinfo_tbl[22].prop_cur_uval 111 #define sctps_rto_ming_high sctps_propinfo_tbl[22].prop_max_uval 112 #define sctps_rto_ming_low sctps_propinfo_tbl[22].prop_min_uval 113 #define sctps_rto_maxg sctps_propinfo_tbl[23].prop_cur_uval 114 #define sctps_rto_maxg_high sctps_propinfo_tbl[23].prop_max_uval 115 #define sctps_rto_maxg_low sctps_propinfo_tbl[23].prop_min_uval 116 #define sctps_rto_initialg sctps_propinfo_tbl[24].prop_cur_uval 117 #define sctps_rto_initialg_high sctps_propinfo_tbl[24].prop_max_uval 118 #define sctps_rto_initialg_low sctps_propinfo_tbl[24].prop_min_uval 119 #define sctps_cookie_life sctps_propinfo_tbl[25].prop_cur_uval 120 #define sctps_cookie_life_high sctps_propinfo_tbl[25].prop_max_uval 121 #define sctps_cookie_life_low sctps_propinfo_tbl[25].prop_min_uval 122 #define sctps_max_in_streams sctps_propinfo_tbl[26].prop_cur_uval 123 #define sctps_max_in_streams_high sctps_propinfo_tbl[26].prop_max_uval 124 #define sctps_max_in_streams_low sctps_propinfo_tbl[26].prop_min_uval 125 #define sctps_initial_out_streams sctps_propinfo_tbl[27].prop_cur_uval 126 #define sctps_initial_out_streams_high sctps_propinfo_tbl[27].prop_max_uval 127 #define sctps_initial_out_streams_low sctps_propinfo_tbl[27].prop_min_uval 128 #define sctps_shutack_wait_bound sctps_propinfo_tbl[28].prop_cur_uval 129 #define sctps_maxburst sctps_propinfo_tbl[29].prop_cur_uval 130 #define sctps_addip_enabled sctps_propinfo_tbl[30].prop_cur_bval 131 #define sctps_recv_hiwat_minmss sctps_propinfo_tbl[31].prop_cur_uval 132 #define sctps_slow_start_initial sctps_propinfo_tbl[32].prop_cur_uval 133 #define sctps_slow_start_after_idle sctps_propinfo_tbl[33].prop_cur_uval 134 #define sctps_prsctp_enabled sctps_propinfo_tbl[34].prop_cur_bval 135 #define sctps_fast_rxt_thresh sctps_propinfo_tbl[35].prop_cur_uval 136 #define sctps_deferred_acks_max sctps_propinfo_tbl[36].prop_cur_uval 137 #define sctps_wroff_xtra sctps_propinfo_tbl[37].prop_cur_uval 138 139 /* 140 * Retransmission timer start and stop macro for a given faddr. 141 */ 142 #define SCTP_FADDR_TIMER_RESTART(sctp, fp, intvl) \ 143 { \ 144 dprint(3, ("faddr_timer_restart: fp=%p %x:%x:%x:%x %d\n", \ 145 (void *)(fp), SCTP_PRINTADDR((fp)->faddr), (int)(intvl))); \ 146 sctp_timer((sctp), (fp)->timer_mp, (intvl)); \ 147 (fp)->timer_running = 1; \ 148 } 149 150 #define SCTP_FADDR_TIMER_STOP(fp) \ 151 ASSERT((fp)->timer_mp != NULL); \ 152 if ((fp)->timer_running) { \ 153 sctp_timer_stop((fp)->timer_mp); \ 154 (fp)->timer_running = 0; \ 155 } 156 157 /* For per endpoint association statistics */ 158 #define SCTP_MAX_RTO(sctp, fp) { \ 159 /* \ 160 * Record the maximum observed RTO, \ 161 * sctp_maxrto is zeroed elsewhere \ 162 * at the end of each stats request. \ 163 */ \ 164 (sctp)->sctp_maxrto = \ 165 MAX((sctp)->sctp_maxrto, (fp)->rto); \ 166 DTRACE_PROBE2(sctp__maxrto, sctp_t *, \ 167 sctp, struct sctp_faddr_s, fp); \ 168 } 169 170 #define SCTP_CALC_RXT(sctp, fp) \ 171 { \ 172 if (((fp)->rto <<= 1) > (sctp)->sctp_rto_max) \ 173 (fp)->rto = (sctp)->sctp_rto_max; \ 174 SCTP_MAX_RTO(sctp, fp); \ 175 } 176 177 178 #define SCTP_MAX_COMBINED_HEADER_LENGTH (60 + 12) /* Maxed out ip + sctp */ 179 #define SCTP_MAX_IP_OPTIONS_LENGTH (60 - IP_SIMPLE_HDR_LENGTH) 180 #define SCTP_MAX_HDR_LENGTH 60 181 182 #define SCTP_SECRET_LEN 16 183 184 #define SCTP_REFHOLD(sctp) { \ 185 mutex_enter(&(sctp)->sctp_reflock); \ 186 (sctp)->sctp_refcnt++; \ 187 DTRACE_PROBE1(sctp_refhold, sctp_t, sctp); \ 188 ASSERT((sctp)->sctp_refcnt != 0); \ 189 mutex_exit(&(sctp)->sctp_reflock); \ 190 } 191 192 #define SCTP_REFRELE(sctp) { \ 193 mutex_enter(&(sctp)->sctp_reflock); \ 194 ASSERT((sctp)->sctp_refcnt != 0); \ 195 if (--(sctp)->sctp_refcnt == 0) { \ 196 DTRACE_PROBE1(sctp_refrele, sctp_t, sctp); \ 197 mutex_exit(&(sctp)->sctp_reflock); \ 198 CONN_DEC_REF((sctp)->sctp_connp); \ 199 } else { \ 200 DTRACE_PROBE1(sctp_refrele, sctp_t, sctp); \ 201 mutex_exit(&(sctp)->sctp_reflock); \ 202 } \ 203 } 204 205 #define SCTP_PRINTADDR(a) (a).s6_addr32[0], (a).s6_addr32[1],\ 206 (a).s6_addr32[2], (a).s6_addr32[3] 207 208 #define CONN2SCTP(conn) ((sctp_t *)(&((conn_t *)conn)[1])) 209 210 /* 211 * Outbound data, flags and macros for per-message, per-chunk info 212 */ 213 typedef struct { 214 int64_t smh_ttl; /* Time to Live */ 215 int64_t smh_tob; /* Time of Birth */ 216 uint32_t smh_context; 217 uint16_t smh_sid; 218 uint16_t smh_ssn; 219 uint32_t smh_ppid; 220 uint16_t smh_flags; 221 uint32_t smh_msglen; 222 } sctp_msg_hdr_t; 223 224 #define SCTP_CHUNK_FLAG_SENT 0x01 225 #define SCTP_CHUNK_FLAG_REXMIT 0x02 226 #define SCTP_CHUNK_FLAG_ACKED 0x04 227 #define SCTP_MSG_FLAG_CHUNKED 0x08 228 #define SCTP_MSG_FLAG_ABANDONED 0x10 229 #define SCTP_CHUNK_FLAG_ABANDONED 0x20 230 231 #define SCTP_CHUNK_CLEAR_FLAGS(mp) ((mp)->b_flag = 0) 232 /* 233 * If we are transmitting the chunk for the first time we assign the TSN and 234 * SSN here. The reason we assign the SSN here (as opposed to doing it in 235 * sctp_chunkify()) is that the chunk may expire, if PRSCTP is enabled, before 236 * we get a chance to send it out. If we assign the SSN in sctp_chunkify() 237 * and this happens, then we need to send a Forward TSN to the peer, which 238 * will be expecting this SSN, assuming ordered. If we assign it here we 239 * can just take out the chunk from the transmit list without having to 240 * send a Forward TSN chunk. While assigning the SSN we use (meta)->b_cont 241 * to determine if it needs a new SSN (i.e. the next SSN for the stream), 242 * since (meta)->b_cont signifies the first chunk of a message (if the message 243 * is unordered, then the SSN is 0). 244 * 245 */ 246 #define SCTP_CHUNK_SENT(sctp, mp, sdc, fp, chunkdata, meta) { \ 247 if (!SCTP_CHUNK_ISSENT(mp)) { \ 248 sctp_msg_hdr_t *mhdr = (sctp_msg_hdr_t *)(meta)->b_rptr; \ 249 ASSERT(!SCTP_CHUNK_ABANDONED(mp)); \ 250 (mp)->b_flag = SCTP_CHUNK_FLAG_SENT; \ 251 (sdc)->sdh_tsn = htonl((sctp)->sctp_ltsn++); \ 252 if ((mhdr)->smh_flags & MSG_UNORDERED) { \ 253 (sdc)->sdh_ssn = 0; \ 254 SCTP_DATA_SET_UBIT(sdc); \ 255 BUMP_LOCAL((sctp)->sctp_oudchunks); \ 256 } else { \ 257 BUMP_LOCAL((sctp)->sctp_odchunks); \ 258 if ((mp) == (meta)->b_cont) { \ 259 mhdr->smh_ssn = htons( \ 260 (sctp)->sctp_ostrcntrs[mhdr->smh_sid]++); \ 261 } \ 262 (sdc)->sdh_ssn = mhdr->smh_ssn; \ 263 } \ 264 (sctp)->sctp_unacked += (chunkdata); \ 265 (sctp)->sctp_unsent -= (chunkdata); \ 266 (sctp)->sctp_frwnd -= (chunkdata); \ 267 } else { \ 268 if (SCTP_CHUNK_ISACKED(mp)) { \ 269 (sctp)->sctp_unacked += (chunkdata); \ 270 } else { \ 271 ASSERT(SCTP_CHUNK_DEST(mp)->suna >= ((chunkdata) + \ 272 sizeof (*sdc))); \ 273 SCTP_CHUNK_DEST(mp)->suna -= ((chunkdata) + \ 274 sizeof (*sdc)); \ 275 } \ 276 (mp)->b_flag &= ~(SCTP_CHUNK_FLAG_REXMIT | \ 277 SCTP_CHUNK_FLAG_ACKED); \ 278 SCTP_CHUNK_SET_SACKCNT(mp, 0); \ 279 BUMP_LOCAL(sctp->sctp_rxtchunks); \ 280 BUMP_LOCAL((sctp)->sctp_T3expire); \ 281 BUMP_LOCAL((fp)->T3expire); \ 282 } \ 283 SCTP_SET_CHUNK_DEST(mp, fp); \ 284 (fp)->suna += ((chunkdata) + sizeof (*sdc)); \ 285 } 286 287 #define SCTP_CHUNK_ISSENT(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_SENT) 288 #define SCTP_CHUNK_CANSEND(mp) \ 289 (!(SCTP_CHUNK_ABANDONED(mp)) && \ 290 (((mp)->b_flag & (SCTP_CHUNK_FLAG_REXMIT|SCTP_CHUNK_FLAG_SENT)) != \ 291 SCTP_CHUNK_FLAG_SENT)) 292 293 #define SCTP_CHUNK_DEST(mp) ((sctp_faddr_t *)(mp)->b_queue) 294 #define SCTP_SET_CHUNK_DEST(mp, fp) ((mp)->b_queue = (queue_t *)fp) 295 296 #define SCTP_CHUNK_REXMIT(mp) ((mp)->b_flag |= SCTP_CHUNK_FLAG_REXMIT) 297 #define SCTP_CHUNK_CLEAR_REXMIT(mp) ((mp)->b_flag &= ~SCTP_CHUNK_FLAG_REXMIT) 298 #define SCTP_CHUNK_WANT_REXMIT(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_REXMIT) 299 300 #define SCTP_CHUNK_ACKED(mp) \ 301 ((mp)->b_flag = (SCTP_CHUNK_FLAG_SENT|SCTP_CHUNK_FLAG_ACKED)) 302 #define SCTP_CHUNK_ISACKED(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_ACKED) 303 #define SCTP_CHUNK_CLEAR_ACKED(mp) ((mp)->b_flag &= ~SCTP_CHUNK_FLAG_ACKED) 304 305 #define SCTP_CHUNK_SACKCNT(mp) ((intptr_t)((mp)->b_prev)) 306 #define SCTP_CHUNK_SET_SACKCNT(mp, val) ((mp)->b_prev = \ 307 (mblk_t *)(uintptr_t)(val)) 308 309 #define SCTP_MSG_SET_CHUNKED(mp) ((mp)->b_flag |= SCTP_MSG_FLAG_CHUNKED) 310 #define SCTP_MSG_CLEAR_CHUNKED(mp)((mp)->b_flag &= ~SCTP_MSG_FLAG_CHUNKED) 311 #define SCTP_IS_MSG_CHUNKED(mp) ((mp)->b_flag & SCTP_MSG_FLAG_CHUNKED) 312 313 /* For PR-SCTP */ 314 #define SCTP_ABANDON_CHUNK(mp) ((mp)->b_flag |= SCTP_CHUNK_FLAG_ABANDONED) 315 #define SCTP_CHUNK_ABANDONED(mp) \ 316 ((mp)->b_flag & SCTP_CHUNK_FLAG_ABANDONED) 317 318 #define SCTP_MSG_SET_ABANDONED(mp) \ 319 ((mp)->b_flag |= SCTP_MSG_FLAG_ABANDONED) 320 #define SCTP_MSG_CLEAR_ABANDONED(mp)((mp)->b_flag &= ~SCTP_MSG_FLAG_ABANDONED) 321 #define SCTP_IS_MSG_ABANDONED(mp) ((mp)->b_flag & SCTP_MSG_FLAG_ABANDONED) 322 323 /* 324 * Check if a message has expired. A message is expired if 325 * 1. It has a non-zero time to live value and has not been sent before 326 * that time expires. 327 * 2. It is sent using PRSCTP and it has not been SACK'ed before 328 * its lifetime expires. 329 */ 330 #define SCTP_MSG_TO_BE_ABANDONED(meta, mhdr, sctp) \ 331 (((!SCTP_CHUNK_ISSENT((meta)->b_cont) && (mhdr)->smh_ttl > 0) || \ 332 ((sctp)->sctp_prsctp_aware && ((mhdr)->smh_flags & MSG_PR_SCTP))) && \ 333 ((ddi_get_lbolt64() - (mhdr)->smh_tob) > (mhdr)->smh_ttl)) 334 335 /* SCTP association hash function. */ 336 #define SCTP_CONN_HASH(sctps, ports) \ 337 ((((ports) ^ ((ports) >> 16)) * 31) & \ 338 ((sctps)->sctps_conn_hash_size - 1)) 339 340 /* 341 * Bind hash array size and hash function. The size must be a power 342 * of 2 and lport must be in host byte order. 343 */ 344 #define SCTP_BIND_FANOUT_SIZE 2048 345 #define SCTP_BIND_HASH(lport) (((lport) * 31) & (SCTP_BIND_FANOUT_SIZE - 1)) 346 347 /* options that SCTP negotiates during association establishment */ 348 #define SCTP_PRSCTP_OPTION 0x01 349 350 /* 351 * Listener hash array size and hash function. The size must be a power 352 * of 2 and lport must be in host byte order. 353 */ 354 #define SCTP_LISTEN_FANOUT_SIZE 512 355 #define SCTP_LISTEN_HASH(lport) (((lport) * 31) & (SCTP_LISTEN_FANOUT_SIZE - 1)) 356 357 typedef struct sctp_tf_s { 358 struct sctp_s *tf_sctp; 359 kmutex_t tf_lock; 360 } sctp_tf_t; 361 362 /* Round up the value to the nearest mss. */ 363 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss)) 364 365 extern sin_t sctp_sin_null; /* Zero address for quick clears */ 366 extern sin6_t sctp_sin6_null; /* Zero address for quick clears */ 367 368 #define SCTP_IS_DETACHED(sctp) ((sctp)->sctp_detached) 369 370 /* Data structure used to track received TSNs */ 371 typedef struct sctp_set_s { 372 struct sctp_set_s *next; 373 struct sctp_set_s *prev; 374 uint32_t begin; 375 uint32_t end; 376 } sctp_set_t; 377 378 /* Data structure used to track TSNs for PR-SCTP */ 379 typedef struct sctp_ftsn_set_s { 380 struct sctp_ftsn_set_s *next; 381 ftsn_entry_t ftsn_entries; 382 } sctp_ftsn_set_t; 383 384 /* Data structure used to track incoming SCTP streams */ 385 typedef struct sctp_instr_s { 386 mblk_t *istr_msgs; 387 int istr_nmsgs; 388 uint16_t nextseq; 389 struct sctp_s *sctp; 390 mblk_t *istr_reass; 391 } sctp_instr_t; 392 393 /* Reassembly data structure (per-stream) */ 394 typedef struct sctp_reass_s { 395 uint16_t ssn; 396 uint16_t needed; 397 uint16_t got; 398 uint16_t msglen; /* len of consecutive fragments */ 399 /* from the begining (B-bit) */ 400 mblk_t *tail; 401 boolean_t hasBchunk; /* If the fragment list begins with */ 402 /* a B-bit set chunk */ 403 uint32_t nexttsn; /* TSN of the next fragment we */ 404 /* are expecting */ 405 boolean_t partial_delivered; 406 } sctp_reass_t; 407 408 /* debugging */ 409 #undef dprint 410 #ifdef DEBUG 411 extern int sctpdebug; 412 #define dprint(level, args) { if (sctpdebug > (level)) printf args; } 413 #else 414 #define dprint(level, args) {} 415 #endif 416 417 418 /* Peer address tracking */ 419 420 /* 421 * States for peer addresses 422 * 423 * SCTP_FADDRS_UNCONFIRMED: we have not communicated with this peer address 424 * before, mark it as unconfirmed so that we will not send data to it. 425 * All addresses initially are in unconfirmed state and required 426 * validation. SCTP sends a heartbeat to each of them and when it gets 427 * back a heartbeat ACK, the address will be marked as alive. This 428 * validation fixes a security issue with multihoming. If an attacker 429 * establishes an association with us and tells us that it has addresses 430 * belonging to another host A, this will prevent A from communicating 431 * with us. This is fixed by peer address validation. In the above case, 432 * A will respond with an abort. 433 * 434 * SCTP_FADDRS_ALIVE: this peer address is alive and we can communicate with 435 * it with no problem. 436 * 437 * SCTP_FADDRS_DOWN: we have exceeded the retransmission limit to this 438 * peer address. Once an address is marked down, we will only send 439 * a heartbeat to it every hb_interval in case it becomes alive now. 440 * 441 * SCTP_FADDRS_UNREACH: there is no suitable source address to send to 442 * this peer address. For example, the peer address is v6 but we only 443 * have v4 addresses. It is marked unreachable until there is an 444 * address configuration change. At that time, mark these addresses 445 * as unconfirmed and try again to see if those unreachable addresses 446 * are OK as we may have more source addresses. 447 */ 448 typedef enum { 449 SCTP_FADDRS_UNREACH, 450 SCTP_FADDRS_DOWN, 451 SCTP_FADDRS_ALIVE, 452 SCTP_FADDRS_UNCONFIRMED 453 } faddr_state_t; 454 455 typedef struct sctp_faddr_s { 456 struct sctp_faddr_s *next; 457 faddr_state_t state; 458 459 in6_addr_t faddr; 460 in6_addr_t saddr; 461 462 int64_t hb_expiry; /* time to retransmit heartbeat */ 463 uint32_t hb_interval; /* the heartbeat interval */ 464 465 int rto; /* RTO in tick */ 466 int srtt; /* Smoothed RTT in tick */ 467 int rttvar; /* RTT variance in tick */ 468 uint32_t rtt_updates; 469 int strikes; 470 int max_retr; 471 uint32_t sfa_pmss; 472 uint32_t cwnd; 473 uint32_t ssthresh; 474 uint32_t suna; /* sent - unack'ed */ 475 uint32_t pba; /* partial bytes acked */ 476 uint32_t acked; 477 int64_t lastactive; 478 mblk_t *timer_mp; /* retransmission timer control */ 479 uint32_t 480 hb_pending : 1, 481 timer_running : 1, 482 df : 1, 483 pmtu_discovered : 1, 484 485 rc_timer_running : 1, 486 isv4 : 1, 487 hb_enabled : 1; 488 489 mblk_t *rc_timer_mp; /* reliable control chunk timer */ 490 ip_xmit_attr_t *ixa; /* Transmit attributes */ 491 uint32_t T3expire; /* # of times T3 timer expired */ 492 493 uint64_t hb_secret; /* per addr "secret" in heartbeat */ 494 uint32_t rxt_unacked; /* # unack'ed retransmitted bytes */ 495 } sctp_faddr_t; 496 497 /* Flags to indicate supported address type in the PARM_SUP_ADDRS. */ 498 #define PARM_SUPP_V6 0x1 499 #define PARM_SUPP_V4 0x2 500 501 /* 502 * Set heartbeat interval plus jitter. The jitter is supposed to be random, 503 * up to +/- 50% of the RTO. We use gethrtime() here for performance reason 504 * as the jitter does not really need to be "very" random. 505 */ 506 #define SET_HB_INTVL(fp) \ 507 ((fp)->hb_interval + (fp)->rto + ((fp)->rto >> 1) - \ 508 (uint_t)gethrtime() % (fp)->rto) 509 510 #define SCTP_IPIF_HASH 16 511 512 typedef struct sctp_ipif_hash_s { 513 list_t sctp_ipif_list; 514 int ipif_count; 515 krwlock_t ipif_hash_lock; 516 } sctp_ipif_hash_t; 517 518 519 /* 520 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is 521 * either sctp_slow_start_initial or sctp_slow_start_after idle 522 * depending on the caller. 523 */ 524 #define SET_CWND(fp, mss, def_max_init_cwnd) \ 525 { \ 526 (fp)->cwnd = MIN(def_max_init_cwnd * (mss), \ 527 MIN(4 * (mss), MAX(2 * (mss), 4380 / (mss) * (mss)))); \ 528 } 529 530 531 struct sctp_s; 532 533 /* 534 * Control structure for each open SCTP stream, 535 * defined only within the kernel or for a kmem user. 536 * NOTE: sctp_reinit_values MUST have a line for each field in this structure! 537 */ 538 #if (defined(_KERNEL) || defined(_KMEMUSER)) 539 540 typedef struct sctp_s { 541 542 /* 543 * The following is shared with (and duplicated) in IP, so if you 544 * make changes, make sure you also change things in ip_sctp.c. 545 */ 546 struct sctp_s *sctp_conn_hash_next; 547 struct sctp_s *sctp_conn_hash_prev; 548 549 struct sctp_s *sctp_listen_hash_next; 550 struct sctp_s *sctp_listen_hash_prev; 551 552 sctp_tf_t *sctp_listen_tfp; /* Ptr to tf */ 553 sctp_tf_t *sctp_conn_tfp; /* Ptr to tf */ 554 555 /* Global list of sctp */ 556 list_node_t sctp_list; 557 558 sctp_faddr_t *sctp_faddrs; 559 int sctp_nfaddrs; 560 sctp_ipif_hash_t sctp_saddrs[SCTP_IPIF_HASH]; 561 int sctp_nsaddrs; 562 563 kmutex_t sctp_lock; 564 kcondvar_t sctp_cv; 565 boolean_t sctp_running; 566 567 #define sctp_ulpd sctp_connp->conn_upper_handle 568 #define sctp_upcalls sctp_connp->conn_upcalls 569 570 #define sctp_ulp_newconn sctp_upcalls->su_newconn 571 #define sctp_ulp_connected sctp_upcalls->su_connected 572 #define sctp_ulp_disconnected sctp_upcalls->su_disconnected 573 #define sctp_ulp_opctl sctp_upcalls->su_opctl 574 #define sctp_ulp_recv sctp_upcalls->su_recv 575 #define sctp_ulp_xmitted sctp_upcalls->su_txq_full 576 #define sctp_ulp_prop sctp_upcalls->su_set_proto_props 577 578 int32_t sctp_state; 579 580 conn_t *sctp_connp; /* conn_t stuff */ 581 sctp_stack_t *sctp_sctps; 582 583 /* Peer address tracking */ 584 sctp_faddr_t *sctp_lastfaddr; /* last faddr in list */ 585 sctp_faddr_t *sctp_primary; /* primary faddr */ 586 sctp_faddr_t *sctp_current; /* current faddr */ 587 sctp_faddr_t *sctp_lastdata; /* last data seen from this */ 588 589 /* Outbound data tracking */ 590 mblk_t *sctp_xmit_head; 591 mblk_t *sctp_xmit_tail; 592 mblk_t *sctp_xmit_unsent; 593 mblk_t *sctp_xmit_unsent_tail; 594 mblk_t *sctp_xmit_unacked; 595 596 int32_t sctp_unacked; /* # of unacked bytes */ 597 int32_t sctp_unsent; /* # of unsent bytes in hand */ 598 599 uint32_t sctp_ltsn; /* Local instance TSN */ 600 uint32_t sctp_lastack_rxd; /* Last rx'd cumtsn */ 601 uint32_t sctp_recovery_tsn; /* Exit from fast recovery */ 602 uint32_t sctp_adv_pap; /* Adv. Peer Ack Point */ 603 604 uint16_t sctp_num_ostr; 605 uint16_t *sctp_ostrcntrs; 606 607 mblk_t *sctp_pad_mp; /* pad unaligned data chunks */ 608 609 /* sendmsg() default parameters */ 610 uint16_t sctp_def_stream; /* default stream id */ 611 uint16_t sctp_def_flags; /* default xmit flags */ 612 uint32_t sctp_def_ppid; /* default payload id */ 613 uint32_t sctp_def_context; /* default context */ 614 uint32_t sctp_def_timetolive; /* default msg TTL */ 615 616 /* Inbound data tracking */ 617 sctp_set_t *sctp_sack_info; /* Sack tracking */ 618 mblk_t *sctp_ack_mp; /* Delayed ACK timer block */ 619 sctp_instr_t *sctp_instr; /* Instream trackers */ 620 mblk_t *sctp_uo_frags; /* Un-ordered msg. fragments */ 621 uint32_t sctp_ftsn; /* Peer's TSN */ 622 uint32_t sctp_lastacked; /* last cumtsn SACKd */ 623 uint16_t sctp_num_istr; /* No. of instreams */ 624 int32_t sctp_istr_nmsgs; /* No. of chunks in instreams */ 625 int32_t sctp_sack_gaps; /* No. of received gaps */ 626 int32_t sctp_sack_toggle; /* SACK every other pkt */ 627 628 /* RTT calculation */ 629 uint32_t sctp_rtt_tsn; 630 int64_t sctp_out_time; 631 632 /* Stats can be reset by snmp users kstat, netstat and snmp agents */ 633 uint64_t sctp_opkts; /* sent pkts */ 634 uint64_t sctp_obchunks; /* sent control chunks */ 635 uint64_t sctp_odchunks; /* sent ordered data chunks */ 636 uint64_t sctp_oudchunks; /* sent unord data chunks */ 637 uint64_t sctp_rxtchunks; /* retransmitted chunks */ 638 uint64_t sctp_ipkts; /* recv pkts */ 639 uint64_t sctp_ibchunks; /* recv control chunks */ 640 uint64_t sctp_idchunks; /* recv ordered data chunks */ 641 uint64_t sctp_iudchunks; /* recv unord data chunks */ 642 uint64_t sctp_fragdmsgs; 643 uint64_t sctp_reassmsgs; 644 uint32_t sctp_T1expire; /* # of times T1timer expired */ 645 uint32_t sctp_T2expire; /* # of times T2timer expired */ 646 uint32_t sctp_T3expire; /* # of times T3timer expired */ 647 uint32_t sctp_assoc_start_time; /* time when assoc was est. */ 648 649 uint32_t sctp_frwnd; /* Peer RWND */ 650 uint32_t sctp_cwnd_max; 651 652 /* Inbound flow control */ 653 int32_t sctp_rwnd; /* Current receive window */ 654 int32_t sctp_irwnd; /* Initial receive window */ 655 int32_t sctp_rxqueued; /* No. of bytes in RX q's */ 656 657 /* Pre-initialized composite headers */ 658 uchar_t *sctp_iphc; /* v4 sctp/ip hdr template buffer */ 659 uchar_t *sctp_iphc6; /* v6 sctp/ip hdr template buffer */ 660 661 int32_t sctp_iphc_len; /* actual allocated v4 buffer size */ 662 int32_t sctp_iphc6_len; /* actual allocated v6 buffer size */ 663 664 int32_t sctp_hdr_len; /* len of combined SCTP/IP v4 hdr */ 665 int32_t sctp_hdr6_len; /* len of combined SCTP/IP v6 hdr */ 666 667 ipha_t *sctp_ipha; /* IPv4 header in the buffer */ 668 ip6_t *sctp_ip6h; /* IPv6 header in the buffer */ 669 670 int32_t sctp_ip_hdr_len; /* Byte len of our current v4 hdr */ 671 int32_t sctp_ip_hdr6_len; /* Byte len of our current v6 hdr */ 672 673 sctp_hdr_t *sctp_sctph; /* sctp header in combined v4 hdr */ 674 sctp_hdr_t *sctp_sctph6; /* sctp header in combined v6 hdr */ 675 676 uint32_t sctp_lvtag; /* local SCTP instance verf tag */ 677 uint32_t sctp_fvtag; /* Peer's SCTP verf tag */ 678 679 /* Path MTU Discovery */ 680 int64_t sctp_last_mtu_probe; 681 clock_t sctp_mtu_probe_intvl; 682 uint32_t sctp_mss; /* Max send size (not TCP MSS!) */ 683 684 /* structs sctp_bits, sctp_events are for clearing all bits at once */ 685 struct { 686 uint32_t 687 688 sctp_understands_asconf : 1, /* Peer handles ASCONF chunks */ 689 sctp_cchunk_pend : 1, /* Control chunk in flight. */ 690 sctp_lingering : 1, /* Lingering in close */ 691 sctp_loopback: 1, /* src and dst are the same machine */ 692 693 sctp_force_sack : 1, 694 sctp_ack_timer_running: 1, /* Delayed ACK timer running */ 695 sctp_hwcksum : 1, /* The NIC is capable of hwcksum */ 696 sctp_understands_addip : 1, 697 698 sctp_bound_to_all : 1, 699 sctp_cansleep : 1, /* itf routines can sleep */ 700 sctp_detached : 1, /* If we're detached from a stream */ 701 sctp_send_adaptation : 1, /* send adaptation layer ind */ 702 703 sctp_recv_adaptation : 1, /* recv adaptation layer ind */ 704 sctp_ndelay : 1, /* turn off Nagle */ 705 sctp_condemned : 1, /* this sctp is about to disappear */ 706 sctp_chk_fast_rexmit : 1, /* check for fast rexmit message */ 707 708 sctp_prsctp_aware : 1, /* is peer PR-SCTP aware? */ 709 sctp_linklocal : 1, /* is linklocal assoc. */ 710 sctp_rexmitting : 1, /* SCTP is retransmitting */ 711 sctp_zero_win_probe : 1, /* doing zero win probe */ 712 713 sctp_txq_full : 1, /* the tx queue is full */ 714 sctp_ulp_discon_done : 1, /* ulp_disconnecting done */ 715 sctp_dummy : 6; 716 } sctp_bits; 717 struct { 718 uint32_t 719 720 sctp_recvsndrcvinfo : 1, 721 sctp_recvassocevnt : 1, 722 sctp_recvpathevnt : 1, 723 sctp_recvsendfailevnt : 1, 724 725 sctp_recvpeererr : 1, 726 sctp_recvshutdownevnt : 1, 727 sctp_recvpdevnt : 1, 728 sctp_recvalevnt : 1; 729 } sctp_events; 730 #define sctp_priv_stream sctp_bits.sctp_priv_stream 731 #define sctp_understands_asconf sctp_bits.sctp_understands_asconf 732 #define sctp_cchunk_pend sctp_bits.sctp_cchunk_pend 733 #define sctp_lingering sctp_bits.sctp_lingering 734 #define sctp_loopback sctp_bits.sctp_loopback 735 #define sctp_force_sack sctp_bits.sctp_force_sack 736 #define sctp_ack_timer_running sctp_bits.sctp_ack_timer_running 737 #define sctp_hwcksum sctp_bits.sctp_hwcksum 738 #define sctp_understands_addip sctp_bits.sctp_understands_addip 739 #define sctp_bound_to_all sctp_bits.sctp_bound_to_all 740 #define sctp_cansleep sctp_bits.sctp_cansleep 741 #define sctp_detached sctp_bits.sctp_detached 742 #define sctp_send_adaptation sctp_bits.sctp_send_adaptation 743 #define sctp_recv_adaptation sctp_bits.sctp_recv_adaptation 744 #define sctp_ndelay sctp_bits.sctp_ndelay 745 #define sctp_condemned sctp_bits.sctp_condemned 746 #define sctp_chk_fast_rexmit sctp_bits.sctp_chk_fast_rexmit 747 #define sctp_prsctp_aware sctp_bits.sctp_prsctp_aware 748 #define sctp_linklocal sctp_bits.sctp_linklocal 749 #define sctp_rexmitting sctp_bits.sctp_rexmitting 750 #define sctp_zero_win_probe sctp_bits.sctp_zero_win_probe 751 #define sctp_txq_full sctp_bits.sctp_txq_full 752 #define sctp_ulp_discon_done sctp_bits.sctp_ulp_discon_done 753 754 #define sctp_recvsndrcvinfo sctp_events.sctp_recvsndrcvinfo 755 #define sctp_recvassocevnt sctp_events.sctp_recvassocevnt 756 #define sctp_recvpathevnt sctp_events.sctp_recvpathevnt 757 #define sctp_recvsendfailevnt sctp_events.sctp_recvsendfailevnt 758 #define sctp_recvpeererr sctp_events.sctp_recvpeererr 759 #define sctp_recvshutdownevnt sctp_events.sctp_recvshutdownevnt 760 #define sctp_recvpdevnt sctp_events.sctp_recvpdevnt 761 #define sctp_recvalevnt sctp_events.sctp_recvalevnt 762 763 /* Retransmit info */ 764 mblk_t *sctp_cookie_mp; /* cookie chunk, if rxt needed */ 765 int32_t sctp_strikes; /* Total number of assoc strikes */ 766 int32_t sctp_max_init_rxt; 767 int32_t sctp_pa_max_rxt; /* Max per-assoc retransmit cnt */ 768 int32_t sctp_pp_max_rxt; /* Max per-path retransmit cnt */ 769 uint32_t sctp_rto_max; 770 uint32_t sctp_init_rto_max; 771 uint32_t sctp_rto_min; 772 uint32_t sctp_rto_initial; 773 774 int64_t sctp_last_secret_update; 775 uint8_t sctp_secret[SCTP_SECRET_LEN]; /* for cookie auth */ 776 uint8_t sctp_old_secret[SCTP_SECRET_LEN]; 777 uint32_t sctp_cookie_lifetime; /* cookie lifetime in tick */ 778 779 /* Bind hash tables */ 780 kmutex_t *sctp_bind_lockp; /* Ptr to tf_lock */ 781 struct sctp_s *sctp_bind_hash; 782 struct sctp_s **sctp_ptpbhn; 783 784 /* Shutdown / cleanup */ 785 sctp_faddr_t *sctp_shutdown_faddr; /* rotate faddr during shutd */ 786 int32_t sctp_client_errno; /* How the client screwed up */ 787 kmutex_t sctp_reflock; /* Protects sctp_refcnt & timer mp */ 788 ushort_t sctp_refcnt; /* No. of pending upstream msg */ 789 mblk_t *sctp_timer_mp; /* List of fired timers. */ 790 791 mblk_t *sctp_heartbeat_mp; /* Timer block for heartbeats */ 792 uint32_t sctp_hb_interval; /* Default hb_interval */ 793 794 int32_t sctp_autoclose; /* Auto disconnect in ticks */ 795 int64_t sctp_active; /* Last time data/sack on this conn */ 796 uint32_t sctp_tx_adaptation_code; /* TX adaptation code */ 797 uint32_t sctp_rx_adaptation_code; /* RX adaptation code */ 798 799 /* Reliable control chunks */ 800 mblk_t *sctp_cxmit_list; /* Xmit list for control chunks */ 801 uint32_t sctp_lcsn; /* Our serial number */ 802 uint32_t sctp_fcsn; /* Peer serial number */ 803 804 /* Per association receive queue */ 805 kmutex_t sctp_recvq_lock; 806 mblk_t *sctp_recvq; 807 mblk_t *sctp_recvq_tail; 808 taskq_t *sctp_recvq_tq; 809 810 /* IPv6 ancillary data */ 811 uint_t sctp_recvifindex; /* last rcvd IPV6_RCVPKTINFO */ 812 uint_t sctp_recvhops; /* " IPV6_RECVHOPLIMIT */ 813 uint_t sctp_recvtclass; /* " IPV6_RECVTCLASS */ 814 ip6_hbh_t *sctp_hopopts; /* " IPV6_RECVHOPOPTS */ 815 ip6_dest_t *sctp_dstopts; /* " IPV6_RECVDSTOPTS */ 816 ip6_dest_t *sctp_rthdrdstopts; /* " IPV6_RECVRTHDRDSTOPTS */ 817 ip6_rthdr_t *sctp_rthdr; /* " IPV6_RECVRTHDR */ 818 uint_t sctp_hopoptslen; 819 uint_t sctp_dstoptslen; 820 uint_t sctp_rthdrdstoptslen; 821 uint_t sctp_rthdrlen; 822 823 /* Stats */ 824 uint64_t sctp_msgcount; 825 uint64_t sctp_prsctpdrop; 826 827 uint_t sctp_v4label_len; /* length of cached v4 label */ 828 uint_t sctp_v6label_len; /* length of cached v6 label */ 829 uint32_t sctp_rxt_nxttsn; /* Next TSN to be rexmitted */ 830 uint32_t sctp_rxt_maxtsn; /* Max TSN sent at time out */ 831 832 int sctp_pd_point; /* Partial delivery point */ 833 mblk_t *sctp_err_chunks; /* Error chunks */ 834 uint32_t sctp_err_len; /* Total error chunks length */ 835 836 /* additional source data for per endpoint association statistics */ 837 uint64_t sctp_outseqtsns; /* TSN rx > expected TSN */ 838 uint64_t sctp_osacks; /* total sacks sent */ 839 uint64_t sctp_isacks; /* total sacks received */ 840 uint64_t sctp_idupchunks; /* rx dups, ord or unord */ 841 uint64_t sctp_gapcnt; /* total gap acks rx */ 842 /* 843 * Add the current data from the counters which are reset by snmp 844 * to these cumulative counters to use in per endpoint statistics. 845 */ 846 uint64_t sctp_cum_obchunks; /* sent control chunks */ 847 uint64_t sctp_cum_odchunks; /* sent ordered data chunks */ 848 uint64_t sctp_cum_oudchunks; /* sent unord data chunks */ 849 uint64_t sctp_cum_rxtchunks; /* retransmitted chunks */ 850 uint64_t sctp_cum_ibchunks; /* recv control chunks */ 851 uint64_t sctp_cum_idchunks; /* recv ordered data chunks */ 852 uint64_t sctp_cum_iudchunks; /* recv unord data chunks */ 853 854 /* 855 * When non-zero, this is the maximum observed RTO since assoc stats 856 * were last requested. When zero, no RTO update has occurred since 857 * the previous user request for stats on this endpoint. 858 */ 859 int sctp_maxrto; 860 /* 861 * The stored value of sctp_maxrto passed to user during the previous 862 * user request for stats on this endpoint. 863 */ 864 int sctp_prev_maxrto; 865 } sctp_t; 866 867 #define SCTP_TXQ_LEN(sctp) ((sctp)->sctp_unsent + (sctp)->sctp_unacked) 868 #define SCTP_TXQ_UPDATE(sctp) \ 869 if ((sctp)->sctp_txq_full && SCTP_TXQ_LEN(sctp) <= \ 870 (sctp)->sctp_connp->conn_sndlowat) { \ 871 (sctp)->sctp_txq_full = 0; \ 872 (sctp)->sctp_ulp_xmitted((sctp)->sctp_ulpd, \ 873 B_FALSE); \ 874 } 875 876 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 877 878 extern void sctp_ack_timer(sctp_t *); 879 extern size_t sctp_adaptation_code_param(sctp_t *, uchar_t *); 880 extern void sctp_adaptation_event(sctp_t *); 881 extern void sctp_add_err(sctp_t *, uint16_t, void *, size_t, 882 sctp_faddr_t *); 883 extern int sctp_add_faddr(sctp_t *, in6_addr_t *, int, boolean_t); 884 extern boolean_t sctp_add_ftsn_set(sctp_ftsn_set_t **, sctp_faddr_t *, mblk_t *, 885 uint_t *, uint32_t *); 886 extern void sctp_add_recvq(sctp_t *, mblk_t *, boolean_t, 887 ip_recv_attr_t *); 888 extern void sctp_add_unrec_parm(sctp_parm_hdr_t *, mblk_t **, boolean_t); 889 extern size_t sctp_addr_params(sctp_t *, int, uchar_t *, boolean_t); 890 extern mblk_t *sctp_add_proto_hdr(sctp_t *, sctp_faddr_t *, mblk_t *, int, 891 int *); 892 extern void sctp_addr_req(sctp_t *, mblk_t *); 893 extern sctp_t *sctp_addrlist2sctp(mblk_t *, sctp_hdr_t *, sctp_chunk_hdr_t *, 894 zoneid_t, sctp_stack_t *); 895 extern void sctp_check_adv_ack_pt(sctp_t *, mblk_t *, mblk_t *); 896 extern void sctp_assoc_event(sctp_t *, uint16_t, uint16_t, 897 sctp_chunk_hdr_t *); 898 899 extern void sctp_bind_hash_insert(sctp_tf_t *, sctp_t *, int); 900 extern void sctp_bind_hash_remove(sctp_t *); 901 extern int sctp_bindi(sctp_t *, in_port_t, boolean_t, int, in_port_t *); 902 extern int sctp_bind_add(sctp_t *, const void *, uint32_t, boolean_t, 903 in_port_t); 904 extern int sctp_bind_del(sctp_t *, const void *, uint32_t, boolean_t); 905 extern int sctp_build_hdrs(sctp_t *, int); 906 907 extern int sctp_check_abandoned_msg(sctp_t *, mblk_t *); 908 extern void sctp_clean_death(sctp_t *, int); 909 extern void sctp_close_eager(sctp_t *); 910 extern int sctp_compare_faddrsets(sctp_faddr_t *, sctp_faddr_t *); 911 extern void sctp_congest_reset(sctp_t *); 912 extern void sctp_conn_hash_insert(sctp_tf_t *, sctp_t *, int); 913 extern void sctp_conn_hash_remove(sctp_t *); 914 extern void sctp_conn_init(conn_t *); 915 extern sctp_t *sctp_conn_match(in6_addr_t *, in6_addr_t *, uint32_t, 916 zoneid_t, iaflags_t, sctp_stack_t *); 917 extern sctp_t *sctp_conn_request(sctp_t *, mblk_t *, uint_t, uint_t, 918 sctp_init_chunk_t *, ip_recv_attr_t *); 919 extern uint32_t sctp_cumack(sctp_t *, uint32_t, mblk_t **); 920 extern sctp_t *sctp_create_eager(sctp_t *); 921 922 extern void sctp_dispatch_rput(queue_t *, sctp_t *, sctp_hdr_t *, mblk_t *, 923 uint_t, uint_t, in6_addr_t); 924 extern char *sctp_display(sctp_t *, char *); 925 extern void sctp_display_all(sctp_stack_t *); 926 927 extern void sctp_error_event(sctp_t *, sctp_chunk_hdr_t *, boolean_t); 928 929 extern void sctp_faddr_alive(sctp_t *, sctp_faddr_t *); 930 extern int sctp_faddr_dead(sctp_t *, sctp_faddr_t *, int); 931 extern void sctp_faddr_fini(void); 932 extern void sctp_faddr_init(void); 933 extern void sctp_fast_rexmit(sctp_t *); 934 extern void sctp_fill_sack(sctp_t *, unsigned char *, int); 935 extern void sctp_free_faddr_timers(sctp_t *); 936 extern void sctp_free_ftsn_set(sctp_ftsn_set_t *); 937 extern void sctp_free_msg(mblk_t *); 938 extern void sctp_free_reass(sctp_instr_t *); 939 extern void sctp_free_set(sctp_set_t *); 940 extern void sctp_ftsn_sets_fini(void); 941 extern void sctp_ftsn_sets_init(void); 942 943 extern int sctp_get_addrlist(sctp_t *, const void *, uint32_t *, 944 uchar_t **, int *, size_t *); 945 extern int sctp_get_addrparams(sctp_t *, sctp_t *, mblk_t *, 946 sctp_chunk_hdr_t *, uint_t *); 947 extern void sctp_get_dest(sctp_t *, sctp_faddr_t *); 948 extern void sctp_get_faddr_list(sctp_t *, uchar_t *, size_t); 949 extern mblk_t *sctp_get_first_sent(sctp_t *); 950 extern mblk_t *sctp_get_msg_to_send(sctp_t *, mblk_t **, mblk_t *, int *, 951 int32_t, uint32_t, sctp_faddr_t *); 952 extern void sctp_get_saddr_list(sctp_t *, uchar_t *, size_t); 953 954 extern int sctp_handle_error(sctp_t *, sctp_hdr_t *, sctp_chunk_hdr_t *, 955 mblk_t *, ip_recv_attr_t *); 956 extern void sctp_hash_destroy(sctp_stack_t *); 957 extern void sctp_hash_init(sctp_stack_t *); 958 extern void sctp_heartbeat_timer(sctp_t *); 959 960 extern void sctp_icmp_error(sctp_t *, mblk_t *); 961 extern void sctp_inc_taskq(sctp_stack_t *); 962 extern void sctp_info_req(sctp_t *, mblk_t *); 963 extern mblk_t *sctp_init_mp(sctp_t *, sctp_faddr_t *); 964 extern boolean_t sctp_initialize_params(sctp_t *, sctp_init_chunk_t *, 965 sctp_init_chunk_t *); 966 extern uint32_t sctp_init2vtag(sctp_chunk_hdr_t *); 967 extern void sctp_intf_event(sctp_t *, in6_addr_t, int, int); 968 extern void sctp_input_data(sctp_t *, mblk_t *, ip_recv_attr_t *); 969 extern void sctp_instream_cleanup(sctp_t *, boolean_t); 970 extern int sctp_is_a_faddr_clean(sctp_t *); 971 972 extern void *sctp_kstat_init(netstackid_t); 973 extern void sctp_kstat_fini(netstackid_t, kstat_t *); 974 extern void *sctp_kstat2_init(netstackid_t, sctp_kstat_t *); 975 extern void sctp_kstat2_fini(netstackid_t, kstat_t *); 976 977 extern ssize_t sctp_link_abort(mblk_t *, uint16_t, char *, size_t, int, 978 boolean_t); 979 extern void sctp_listen_hash_insert(sctp_tf_t *, sctp_t *); 980 extern void sctp_listen_hash_remove(sctp_t *); 981 extern sctp_t *sctp_lookup(sctp_t *, in6_addr_t *, sctp_tf_t *, uint32_t *, 982 int); 983 extern sctp_faddr_t *sctp_lookup_faddr(sctp_t *, in6_addr_t *); 984 985 extern mblk_t *sctp_make_err(sctp_t *, uint16_t, void *, size_t); 986 extern mblk_t *sctp_make_ftsn_chunk(sctp_t *, sctp_faddr_t *, 987 sctp_ftsn_set_t *, uint_t, uint32_t); 988 extern void sctp_make_ftsns(sctp_t *, mblk_t *, mblk_t *, mblk_t **, 989 sctp_faddr_t *, uint32_t *); 990 extern mblk_t *sctp_make_mp(sctp_t *, sctp_faddr_t *, int); 991 extern mblk_t *sctp_make_sack(sctp_t *, sctp_faddr_t *, mblk_t *); 992 extern void sctp_maxpsz_set(sctp_t *); 993 extern void sctp_move_faddr_timers(queue_t *, sctp_t *); 994 995 extern sctp_parm_hdr_t *sctp_next_parm(sctp_parm_hdr_t *, ssize_t *); 996 997 extern void sctp_ootb_shutdown_ack(mblk_t *, uint_t, ip_recv_attr_t *, 998 ip_stack_t *); 999 extern size_t sctp_options_param(const sctp_t *, void *, int); 1000 extern size_t sctp_options_param_len(const sctp_t *, int); 1001 extern void sctp_output(sctp_t *, uint_t); 1002 1003 extern void sctp_partial_delivery_event(sctp_t *); 1004 extern int sctp_process_cookie(sctp_t *, sctp_chunk_hdr_t *, mblk_t *, 1005 sctp_init_chunk_t **, sctp_hdr_t *, int *, in6_addr_t *, 1006 ip_recv_attr_t *); 1007 extern void sctp_process_err(sctp_t *); 1008 extern void sctp_process_heartbeat(sctp_t *, sctp_chunk_hdr_t *); 1009 extern void sctp_process_timer(sctp_t *); 1010 1011 extern void sctp_redo_faddr_srcs(sctp_t *); 1012 extern void sctp_regift_xmitlist(sctp_t *); 1013 extern void sctp_return_heartbeat(sctp_t *, sctp_chunk_hdr_t *, mblk_t *); 1014 extern void sctp_rexmit(sctp_t *, sctp_faddr_t *); 1015 extern mblk_t *sctp_rexmit_packet(sctp_t *, mblk_t **, mblk_t **, 1016 sctp_faddr_t *, uint_t *); 1017 extern void sctp_rexmit_timer(sctp_t *, sctp_faddr_t *); 1018 extern sctp_faddr_t *sctp_rotate_faddr(sctp_t *, sctp_faddr_t *); 1019 1020 extern boolean_t sctp_sack(sctp_t *, mblk_t *); 1021 extern int sctp_secure_restart_check(mblk_t *, sctp_chunk_hdr_t *, 1022 uint32_t, int, sctp_stack_t *, ip_recv_attr_t *); 1023 extern void sctp_send_abort(sctp_t *, uint32_t, uint16_t, char *, size_t, 1024 mblk_t *, int, boolean_t, ip_recv_attr_t *); 1025 extern void sctp_ootb_send_abort(uint32_t, uint16_t, char *, size_t, 1026 const mblk_t *, int, boolean_t, ip_recv_attr_t *, 1027 ip_stack_t *); 1028 extern void sctp_send_cookie_ack(sctp_t *); 1029 extern void sctp_send_cookie_echo(sctp_t *, sctp_chunk_hdr_t *, mblk_t *, 1030 ip_recv_attr_t *); 1031 extern void sctp_send_initack(sctp_t *, sctp_hdr_t *, sctp_chunk_hdr_t *, 1032 mblk_t *, ip_recv_attr_t *); 1033 extern void sctp_send_shutdown(sctp_t *, int); 1034 extern void sctp_send_heartbeat(sctp_t *, sctp_faddr_t *); 1035 extern void sctp_sendfail_event(sctp_t *, mblk_t *, int, boolean_t); 1036 extern void sctp_set_faddr_current(sctp_t *, sctp_faddr_t *); 1037 extern int sctp_set_hdraddrs(sctp_t *); 1038 extern void sctp_set_saddr(sctp_t *, sctp_faddr_t *); 1039 extern void sctp_sets_init(void); 1040 extern void sctp_sets_fini(void); 1041 extern void sctp_shutdown_event(sctp_t *); 1042 extern void sctp_stop_faddr_timers(sctp_t *); 1043 extern int sctp_shutdown_received(sctp_t *, sctp_chunk_hdr_t *, boolean_t, 1044 boolean_t, sctp_faddr_t *); 1045 extern void sctp_shutdown_complete(sctp_t *); 1046 extern void sctp_set_if_mtu(sctp_t *); 1047 extern void sctp_set_iplen(sctp_t *, mblk_t *, ip_xmit_attr_t *); 1048 extern void sctp_set_ulp_prop(sctp_t *); 1049 extern void sctp_ss_rexmit(sctp_t *); 1050 extern size_t sctp_supaddr_param_len(sctp_t *); 1051 extern size_t sctp_supaddr_param(sctp_t *, uchar_t *); 1052 1053 extern void sctp_timer(sctp_t *, mblk_t *, clock_t); 1054 extern mblk_t *sctp_timer_alloc(sctp_t *, pfv_t, int); 1055 extern void sctp_timer_call(sctp_t *sctp, mblk_t *); 1056 extern void sctp_timer_free(mblk_t *); 1057 extern void sctp_timer_stop(mblk_t *); 1058 extern void sctp_unlink_faddr(sctp_t *, sctp_faddr_t *); 1059 1060 extern void sctp_update_dce(sctp_t *sctp); 1061 extern in_port_t sctp_update_next_port(in_port_t, zone_t *zone, sctp_stack_t *); 1062 extern void sctp_update_rtt(sctp_t *, sctp_faddr_t *, clock_t); 1063 extern void sctp_user_abort(sctp_t *, mblk_t *); 1064 1065 extern void sctp_validate_peer(sctp_t *); 1066 1067 extern int sctp_xmit_list_clean(sctp_t *, ssize_t); 1068 1069 extern void sctp_zap_addrs(sctp_t *); 1070 extern void sctp_zap_faddrs(sctp_t *, int); 1071 1072 /* Contract private interface between SCTP and Clustering - PSARC/2005/602 */ 1073 1074 extern void (*cl_sctp_listen)(sa_family_t, uchar_t *, uint_t, in_port_t); 1075 extern void (*cl_sctp_unlisten)(sa_family_t, uchar_t *, uint_t, in_port_t); 1076 extern void (*cl_sctp_connect)(sa_family_t, uchar_t *, uint_t, in_port_t, 1077 uchar_t *, uint_t, in_port_t, boolean_t, cl_sctp_handle_t); 1078 extern void (*cl_sctp_disconnect)(sa_family_t, cl_sctp_handle_t); 1079 extern void (*cl_sctp_assoc_change)(sa_family_t, uchar_t *, size_t, uint_t, 1080 uchar_t *, size_t, uint_t, int, cl_sctp_handle_t); 1081 extern void (*cl_sctp_check_addrs)(sa_family_t, in_port_t, uchar_t **, 1082 size_t, uint_t *, boolean_t); 1083 1084 #define RUN_SCTP(sctp) \ 1085 { \ 1086 mutex_enter(&(sctp)->sctp_lock); \ 1087 while ((sctp)->sctp_running) \ 1088 cv_wait(&(sctp)->sctp_cv, &(sctp)->sctp_lock); \ 1089 (sctp)->sctp_running = B_TRUE; \ 1090 mutex_exit(&(sctp)->sctp_lock); \ 1091 } 1092 1093 /* Wake up recvq taskq */ 1094 #define WAKE_SCTP(sctp) \ 1095 { \ 1096 mutex_enter(&(sctp)->sctp_lock); \ 1097 if ((sctp)->sctp_timer_mp != NULL) \ 1098 sctp_process_timer(sctp); \ 1099 (sctp)->sctp_running = B_FALSE; \ 1100 cv_broadcast(&(sctp)->sctp_cv); \ 1101 mutex_exit(&(sctp)->sctp_lock); \ 1102 } 1103 1104 #ifdef __cplusplus 1105 } 1106 #endif 1107 1108 #endif /* _INET_SCTP_SCTP_IMPL_H */ 1109