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 2009 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 <netinet/sctp.h> 38 #include <inet/sctp_itf.h> 39 #include "sctp_stack.h" 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 /* Streams device identifying info and version */ 46 #define SCTP_DEV_IDINFO "SCTP Streams device 1.0" 47 48 #define SSN_GT(a, b) ((int16_t)((a)-(b)) > 0) 49 #define SSN_GE(a, b) ((int16_t)((a)-(b)) >= 0) 50 51 /* Default buffer size and flow control wake up threshold. */ 52 #define SCTP_XMIT_LOWATER 8192 53 #define SCTP_XMIT_HIWATER 102400 54 #define SCTP_RECV_LOWATER 8192 55 #define SCTP_RECV_HIWATER 102400 56 57 /* SCTP Timer control structure */ 58 typedef struct sctpt_s { 59 pfv_t sctpt_pfv; /* The routine we are to call */ 60 struct sctp_s *sctpt_sctp; /* The parameter we are to pass in */ 61 struct sctp_faddr_s *sctpt_faddr; 62 } sctpt_t; 63 64 /* 65 * Maximum number of duplicate TSNs we can report. This is currently 66 * static, and governs the size of the mblk used to hold the duplicate 67 * reports. The use of duplcate TSN reports is currently experimental, 68 * so for now a static limit should suffice. 69 */ 70 #define SCTP_DUP_MBLK_SZ 64 71 72 #define SCTP_IS_ADDR_UNSPEC(isv4, addr) \ 73 ((isv4) ? IN6_IS_ADDR_V4MAPPED_ANY(&(addr)) : \ 74 IN6_IS_ADDR_UNSPECIFIED(&(addr))) 75 76 /* 77 * SCTP parameters 78 */ 79 /* Named Dispatch Parameter Management Structure */ 80 typedef struct sctpparam_s { 81 uint32_t sctp_param_min; 82 uint32_t sctp_param_max; 83 uint32_t sctp_param_val; 84 char *sctp_param_name; 85 } sctpparam_t; 86 87 #define sctps_max_init_retr sctps_params[0].sctp_param_val 88 #define sctps_max_init_retr_high sctps_params[0].sctp_param_max 89 #define sctps_max_init_retr_low sctps_params[0].sctp_param_min 90 #define sctps_pa_max_retr sctps_params[1].sctp_param_val 91 #define sctps_pa_max_retr_high sctps_params[1].sctp_param_max 92 #define sctps_pa_max_retr_low sctps_params[1].sctp_param_min 93 #define sctps_pp_max_retr sctps_params[2].sctp_param_val 94 #define sctps_pp_max_retr_high sctps_params[2].sctp_param_max 95 #define sctps_pp_max_retr_low sctps_params[2].sctp_param_min 96 #define sctps_cwnd_max_ sctps_params[3].sctp_param_val 97 #define __sctps_not_used1 sctps_params[4].sctp_param_val 98 #define sctps_smallest_nonpriv_port sctps_params[5].sctp_param_val 99 #define sctps_ipv4_ttl sctps_params[6].sctp_param_val 100 #define sctps_heartbeat_interval sctps_params[7].sctp_param_val 101 #define sctps_heartbeat_interval_high sctps_params[7].sctp_param_max 102 #define sctps_heartbeat_interval_low sctps_params[7].sctp_param_min 103 #define sctps_initial_mtu sctps_params[8].sctp_param_val 104 #define sctps_mtu_probe_interval sctps_params[9].sctp_param_val 105 #define sctps_new_secret_interval sctps_params[10].sctp_param_val 106 #define sctps_deferred_ack_interval sctps_params[11].sctp_param_val 107 #define sctps_snd_lowat_fraction sctps_params[12].sctp_param_val 108 #define sctps_ignore_path_mtu sctps_params[13].sctp_param_val 109 #define sctps_initial_ssthresh sctps_params[14].sctp_param_val 110 #define sctps_smallest_anon_port sctps_params[15].sctp_param_val 111 #define sctps_largest_anon_port sctps_params[16].sctp_param_val 112 #define sctps_xmit_hiwat sctps_params[17].sctp_param_val 113 #define sctps_xmit_lowat sctps_params[18].sctp_param_val 114 #define sctps_recv_hiwat sctps_params[19].sctp_param_val 115 #define sctps_max_buf sctps_params[20].sctp_param_val 116 #define sctps_rtt_updates sctps_params[21].sctp_param_val 117 #define sctps_ipv6_hoplimit sctps_params[22].sctp_param_val 118 #define sctps_rto_ming sctps_params[23].sctp_param_val 119 #define sctps_rto_ming_high sctps_params[23].sctp_param_max 120 #define sctps_rto_ming_low sctps_params[23].sctp_param_min 121 #define sctps_rto_maxg sctps_params[24].sctp_param_val 122 #define sctps_rto_maxg_high sctps_params[24].sctp_param_max 123 #define sctps_rto_maxg_low sctps_params[24].sctp_param_min 124 #define sctps_rto_initialg sctps_params[25].sctp_param_val 125 #define sctps_rto_initialg_high sctps_params[25].sctp_param_max 126 #define sctps_rto_initialg_low sctps_params[25].sctp_param_min 127 #define sctps_cookie_life sctps_params[26].sctp_param_val 128 #define sctps_cookie_life_high sctps_params[26].sctp_param_max 129 #define sctps_cookie_life_low sctps_params[26].sctp_param_min 130 #define sctps_max_in_streams sctps_params[27].sctp_param_val 131 #define sctps_max_in_streams_high sctps_params[27].sctp_param_max 132 #define sctps_max_in_streams_low sctps_params[27].sctp_param_min 133 #define sctps_initial_out_streams sctps_params[28].sctp_param_val 134 #define sctps_initial_out_streams_high sctps_params[28].sctp_param_max 135 #define sctps_initial_out_streams_low sctps_params[28].sctp_param_min 136 #define sctps_shutack_wait_bound sctps_params[29].sctp_param_val 137 #define sctps_maxburst sctps_params[30].sctp_param_val 138 #define sctps_addip_enabled sctps_params[31].sctp_param_val 139 #define sctps_recv_hiwat_minmss sctps_params[32].sctp_param_val 140 #define sctps_slow_start_initial sctps_params[33].sctp_param_val 141 #define sctps_slow_start_after_idle sctps_params[34].sctp_param_val 142 #define sctps_prsctp_enabled sctps_params[35].sctp_param_val 143 #define sctps_fast_rxt_thresh sctps_params[36].sctp_param_val 144 #define sctps_deferred_acks_max sctps_params[37].sctp_param_val 145 146 /* 147 * sctp_wroff_xtra is the extra space in front of SCTP/IP header for link 148 * layer header. It has to be a multiple of 4. 149 */ 150 #define sctps_wroff_xtra sctps_wroff_xtra_param->sctp_param_val 151 152 /* 153 * Retransmission timer start and stop macro for a given faddr. 154 */ 155 #define SCTP_FADDR_TIMER_RESTART(sctp, fp, intvl) \ 156 { \ 157 dprint(3, ("faddr_timer_restart: fp=%p %x:%x:%x:%x %d\n", \ 158 (void *)(fp), SCTP_PRINTADDR((fp)->faddr), (int)(intvl))); \ 159 sctp_timer((sctp), (fp)->timer_mp, (intvl)); \ 160 (fp)->timer_running = 1; \ 161 } 162 163 #define SCTP_FADDR_TIMER_STOP(fp) \ 164 ASSERT((fp)->timer_mp != NULL); \ 165 if ((fp)->timer_running) { \ 166 sctp_timer_stop((fp)->timer_mp); \ 167 (fp)->timer_running = 0; \ 168 } 169 170 /* For per endpoint association statistics */ 171 #define SCTP_MAX_RTO(sctp, fp) { \ 172 /* \ 173 * Record the maximum observed RTO, \ 174 * sctp_maxrto is zeroed elsewhere \ 175 * at the end of each stats request. \ 176 */ \ 177 (sctp)->sctp_maxrto = \ 178 MAX((sctp)->sctp_maxrto, (fp)->rto); \ 179 DTRACE_PROBE2(sctp__maxrto, sctp_t *, \ 180 sctp, struct sctp_faddr_s, fp); \ 181 } 182 183 #define SCTP_CALC_RXT(sctp, fp) \ 184 { \ 185 if (((fp)->rto <<= 1) > (sctp)->sctp_rto_max) \ 186 (fp)->rto = (sctp)->sctp_rto_max; \ 187 SCTP_MAX_RTO(sctp, fp); \ 188 } 189 190 191 #define SCTP_MAX_COMBINED_HEADER_LENGTH (60 + 12) /* Maxed out ip + sctp */ 192 #define SCTP_MAX_IP_OPTIONS_LENGTH (60 - IP_SIMPLE_HDR_LENGTH) 193 #define SCTP_MAX_HDR_LENGTH 60 194 195 #define SCTP_SECRET_LEN 16 196 197 #define SCTP_REFHOLD(sctp) { \ 198 mutex_enter(&(sctp)->sctp_reflock); \ 199 (sctp)->sctp_refcnt++; \ 200 ASSERT((sctp)->sctp_refcnt != 0); \ 201 mutex_exit(&(sctp)->sctp_reflock); \ 202 } 203 204 #define SCTP_REFRELE(sctp) { \ 205 mutex_enter(&(sctp)->sctp_reflock); \ 206 ASSERT((sctp)->sctp_refcnt != 0); \ 207 if (--(sctp)->sctp_refcnt == 0) { \ 208 mutex_exit(&(sctp)->sctp_reflock); \ 209 CONN_DEC_REF((sctp)->sctp_connp); \ 210 } else { \ 211 mutex_exit(&(sctp)->sctp_reflock); \ 212 } \ 213 } 214 215 #define SCTP_G_Q_REFHOLD(sctps) { \ 216 atomic_add_32(&(sctps)->sctps_g_q_ref, 1); \ 217 ASSERT((sctps)->sctps_g_q_ref != 0); \ 218 DTRACE_PROBE1(sctp__g__q__refhold, sctp_stack_t, sctps); \ 219 } 220 221 /* 222 * Decrement the reference count on sctp_g_q 223 * In architectures e.g sun4u, where atomic_add_32_nv is just 224 * a cas, we need to maintain the right memory barrier semantics 225 * as that of mutex_exit i.e all the loads and stores should complete 226 * before the cas is executed. membar_exit() does that here. 227 */ 228 #define SCTP_G_Q_REFRELE(sctps) { \ 229 ASSERT((sctps)->sctps_g_q_ref != 0); \ 230 membar_exit(); \ 231 DTRACE_PROBE1(sctp__g__q__refrele, sctp_stack_t, sctps); \ 232 if (atomic_add_32_nv(&(sctps)->sctps_g_q_ref, -1) == 0) \ 233 sctp_g_q_inactive(sctps); \ 234 } 235 236 #define SCTP_PRINTADDR(a) (a).s6_addr32[0], (a).s6_addr32[1],\ 237 (a).s6_addr32[2], (a).s6_addr32[3] 238 239 #define CONN2SCTP(conn) ((sctp_t *)(&((conn_t *)conn)[1])) 240 241 /* 242 * Outbound data, flags and macros for per-message, per-chunk info 243 */ 244 typedef struct { 245 int64_t smh_ttl; /* Time to Live */ 246 int64_t smh_tob; /* Time of Birth */ 247 uint32_t smh_context; 248 uint16_t smh_sid; 249 uint16_t smh_ssn; 250 uint32_t smh_ppid; 251 uint16_t smh_flags; 252 uint32_t smh_msglen; 253 } sctp_msg_hdr_t; 254 255 #define SCTP_CHUNK_FLAG_SENT 0x01 256 #define SCTP_CHUNK_FLAG_REXMIT 0x02 257 #define SCTP_CHUNK_FLAG_ACKED 0x04 258 #define SCTP_MSG_FLAG_CHUNKED 0x08 259 #define SCTP_MSG_FLAG_ABANDONED 0x10 260 #define SCTP_CHUNK_FLAG_ABANDONED 0x20 261 262 #define SCTP_CHUNK_CLEAR_FLAGS(mp) ((mp)->b_flag = 0) 263 /* 264 * If we are transmitting the chunk for the first time we assign the TSN and 265 * SSN here. The reason we assign the SSN here (as opposed to doing it in 266 * sctp_chunkify()) is that the chunk may expire, if PRSCTP is enabled, before 267 * we get a chance to send it out. If we assign the SSN in sctp_chunkify() 268 * and this happens, then we need to send a Forward TSN to the peer, which 269 * will be expecting this SSN, assuming ordered. If we assign it here we 270 * can just take out the chunk from the transmit list without having to 271 * send a Forward TSN chunk. While assigning the SSN we use (meta)->b_cont 272 * to determine if it needs a new SSN (i.e. the next SSN for the stream), 273 * since (meta)->b_cont signifies the first chunk of a message (if the message 274 * is unordered, then the SSN is 0). 275 * 276 */ 277 #define SCTP_CHUNK_SENT(sctp, mp, sdc, fp, chunkdata, meta) { \ 278 if (!SCTP_CHUNK_ISSENT(mp)) { \ 279 sctp_msg_hdr_t *mhdr = (sctp_msg_hdr_t *)(meta)->b_rptr; \ 280 ASSERT(!SCTP_CHUNK_ABANDONED(mp)); \ 281 (mp)->b_flag = SCTP_CHUNK_FLAG_SENT; \ 282 (sdc)->sdh_tsn = htonl((sctp)->sctp_ltsn++); \ 283 if ((mhdr)->smh_flags & MSG_UNORDERED) { \ 284 (sdc)->sdh_ssn = 0; \ 285 SCTP_DATA_SET_UBIT(sdc); \ 286 BUMP_LOCAL((sctp)->sctp_oudchunks); \ 287 } else { \ 288 BUMP_LOCAL((sctp)->sctp_odchunks); \ 289 if ((mp) == (meta)->b_cont) { \ 290 mhdr->smh_ssn = htons( \ 291 (sctp)->sctp_ostrcntrs[mhdr->smh_sid]++); \ 292 } \ 293 (sdc)->sdh_ssn = mhdr->smh_ssn; \ 294 } \ 295 (sctp)->sctp_unacked += (chunkdata); \ 296 (sctp)->sctp_unsent -= (chunkdata); \ 297 (sctp)->sctp_frwnd -= (chunkdata); \ 298 } else { \ 299 if (SCTP_CHUNK_ISACKED(mp)) { \ 300 (sctp)->sctp_unacked += (chunkdata); \ 301 } else { \ 302 ASSERT(SCTP_CHUNK_DEST(mp)->suna >= ((chunkdata) + \ 303 sizeof (*sdc))); \ 304 SCTP_CHUNK_DEST(mp)->suna -= ((chunkdata) + \ 305 sizeof (*sdc)); \ 306 } \ 307 (mp)->b_flag &= ~(SCTP_CHUNK_FLAG_REXMIT | \ 308 SCTP_CHUNK_FLAG_ACKED); \ 309 SCTP_CHUNK_SET_SACKCNT(mp, 0); \ 310 BUMP_LOCAL(sctp->sctp_rxtchunks); \ 311 BUMP_LOCAL((sctp)->sctp_T3expire); \ 312 BUMP_LOCAL((fp)->T3expire); \ 313 } \ 314 SCTP_SET_CHUNK_DEST(mp, fp); \ 315 (fp)->suna += ((chunkdata) + sizeof (*sdc)); \ 316 } 317 318 #define SCTP_CHUNK_ISSENT(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_SENT) 319 #define SCTP_CHUNK_CANSEND(mp) \ 320 (!(SCTP_CHUNK_ABANDONED(mp)) && \ 321 (((mp)->b_flag & (SCTP_CHUNK_FLAG_REXMIT|SCTP_CHUNK_FLAG_SENT)) != \ 322 SCTP_CHUNK_FLAG_SENT)) 323 324 #define SCTP_CHUNK_DEST(mp) ((sctp_faddr_t *)(mp)->b_queue) 325 #define SCTP_SET_CHUNK_DEST(mp, fp) ((mp)->b_queue = (queue_t *)fp) 326 327 #define SCTP_CHUNK_REXMIT(mp) ((mp)->b_flag |= SCTP_CHUNK_FLAG_REXMIT) 328 #define SCTP_CHUNK_CLEAR_REXMIT(mp) ((mp)->b_flag &= ~SCTP_CHUNK_FLAG_REXMIT) 329 #define SCTP_CHUNK_WANT_REXMIT(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_REXMIT) 330 331 #define SCTP_CHUNK_ACKED(mp) \ 332 ((mp)->b_flag = (SCTP_CHUNK_FLAG_SENT|SCTP_CHUNK_FLAG_ACKED)) 333 #define SCTP_CHUNK_ISACKED(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_ACKED) 334 #define SCTP_CHUNK_CLEAR_ACKED(mp) ((mp)->b_flag &= ~SCTP_CHUNK_FLAG_ACKED) 335 336 #define SCTP_CHUNK_SACKCNT(mp) ((intptr_t)((mp)->b_prev)) 337 #define SCTP_CHUNK_SET_SACKCNT(mp, val) ((mp)->b_prev = \ 338 (mblk_t *)(uintptr_t)(val)) 339 340 #define SCTP_MSG_SET_CHUNKED(mp) ((mp)->b_flag |= SCTP_MSG_FLAG_CHUNKED) 341 #define SCTP_MSG_CLEAR_CHUNKED(mp)((mp)->b_flag &= ~SCTP_MSG_FLAG_CHUNKED) 342 #define SCTP_IS_MSG_CHUNKED(mp) ((mp)->b_flag & SCTP_MSG_FLAG_CHUNKED) 343 344 /* For PR-SCTP */ 345 #define SCTP_ABANDON_CHUNK(mp) ((mp)->b_flag |= SCTP_CHUNK_FLAG_ABANDONED) 346 #define SCTP_CHUNK_ABANDONED(mp) \ 347 ((mp)->b_flag & SCTP_CHUNK_FLAG_ABANDONED) 348 349 #define SCTP_MSG_SET_ABANDONED(mp) \ 350 ((mp)->b_flag |= SCTP_MSG_FLAG_ABANDONED) 351 #define SCTP_MSG_CLEAR_ABANDONED(mp)((mp)->b_flag &= ~SCTP_MSG_FLAG_ABANDONED) 352 #define SCTP_IS_MSG_ABANDONED(mp) ((mp)->b_flag & SCTP_MSG_FLAG_ABANDONED) 353 354 /* 355 * Check if a message has expired. A message is expired if 356 * 1. It has a non-zero time to live value and has not been sent before 357 * that time expires. 358 * 2. It is sent using PRSCTP and it has not been SACK'ed before 359 * its lifetime expires. 360 */ 361 #define SCTP_MSG_TO_BE_ABANDONED(meta, mhdr, sctp) \ 362 (((!SCTP_CHUNK_ISSENT((meta)->b_cont) && (mhdr)->smh_ttl > 0) || \ 363 ((sctp)->sctp_prsctp_aware && ((mhdr)->smh_flags & MSG_PR_SCTP))) && \ 364 ((lbolt64 - (mhdr)->smh_tob) > (mhdr)->smh_ttl)) 365 366 /* SCTP association hash function. */ 367 #define SCTP_CONN_HASH(sctps, ports) \ 368 ((((ports) ^ ((ports) >> 16)) * 31) & \ 369 ((sctps)->sctps_conn_hash_size - 1)) 370 371 /* 372 * Bind hash array size and hash function. The size must be a power 373 * of 2 and lport must be in host byte order. 374 */ 375 #define SCTP_BIND_FANOUT_SIZE 2048 376 #define SCTP_BIND_HASH(lport) (((lport) * 31) & (SCTP_BIND_FANOUT_SIZE - 1)) 377 378 /* options that SCTP negotiates during association establishment */ 379 #define SCTP_PRSCTP_OPTION 0x01 380 381 /* 382 * Listener hash array size and hash function. The size must be a power 383 * of 2 and lport must be in host byte order. 384 */ 385 #define SCTP_LISTEN_FANOUT_SIZE 512 386 #define SCTP_LISTEN_HASH(lport) (((lport) * 31) & (SCTP_LISTEN_FANOUT_SIZE - 1)) 387 388 typedef struct sctp_tf_s { 389 struct sctp_s *tf_sctp; 390 kmutex_t tf_lock; 391 } sctp_tf_t; 392 393 /* Round up the value to the nearest mss. */ 394 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss)) 395 396 extern sin_t sctp_sin_null; /* Zero address for quick clears */ 397 extern sin6_t sctp_sin6_null; /* Zero address for quick clears */ 398 399 #define SCTP_IS_DETACHED(sctp) ((sctp)->sctp_detached) 400 401 /* 402 * Object to represent database of options to search passed to 403 * {sock,tpi}optcom_req() interface routine to take care of option 404 * management and associated methods. 405 * XXX These and other externs should ideally move to a SCTP header 406 */ 407 extern optdb_obj_t sctp_opt_obj; 408 extern uint_t sctp_max_optbuf_len; 409 410 /* Data structure used to track received TSNs */ 411 typedef struct sctp_set_s { 412 struct sctp_set_s *next; 413 struct sctp_set_s *prev; 414 uint32_t begin; 415 uint32_t end; 416 } sctp_set_t; 417 418 /* Data structure used to track TSNs for PR-SCTP */ 419 typedef struct sctp_ftsn_set_s { 420 struct sctp_ftsn_set_s *next; 421 ftsn_entry_t ftsn_entries; 422 } sctp_ftsn_set_t; 423 424 /* Data structure used to track incoming SCTP streams */ 425 typedef struct sctp_instr_s { 426 mblk_t *istr_msgs; 427 int istr_nmsgs; 428 uint16_t nextseq; 429 struct sctp_s *sctp; 430 mblk_t *istr_reass; 431 } sctp_instr_t; 432 433 /* Reassembly data structure (per-stream) */ 434 typedef struct sctp_reass_s { 435 uint16_t ssn; 436 uint16_t needed; 437 uint16_t got; 438 uint16_t msglen; /* len of consecutive fragments */ 439 /* from the begining (B-bit) */ 440 mblk_t *tail; 441 boolean_t hasBchunk; /* If the fragment list begins with */ 442 /* a B-bit set chunk */ 443 uint32_t nexttsn; /* TSN of the next fragment we */ 444 /* are expecting */ 445 boolean_t partial_delivered; 446 } sctp_reass_t; 447 448 /* debugging */ 449 #undef dprint 450 #ifdef DEBUG 451 extern int sctpdebug; 452 #define dprint(level, args) { if (sctpdebug > (level)) printf args; } 453 #else 454 #define dprint(level, args) {} 455 #endif 456 457 458 /* Peer address tracking */ 459 460 /* 461 * States for peer addresses 462 * 463 * SCTP_FADDRS_UNCONFIRMED: we have not communicated with this peer address 464 * before, mark it as unconfirmed so that we will not send data to it. 465 * All addresses initially are in unconfirmed state and required 466 * validation. SCTP sends a heartbeat to each of them and when it gets 467 * back a heartbeat ACK, the address will be marked as alive. This 468 * validation fixes a security issue with multihoming. If an attacker 469 * establishes an association with us and tells us that it has addresses 470 * belonging to another host A, this will prevent A from communicating 471 * with us. This is fixed by peer address validation. In the above case, 472 * A will respond with an abort. 473 * 474 * SCTP_FADDRS_ALIVE: this peer address is alive and we can communicate with 475 * it with no problem. 476 * 477 * SCTP_FADDRS_DOWN: we have exceeded the retransmission limit to this 478 * peer address. Once an address is marked down, we will only send 479 * a heartbeat to it every hb_interval in case it becomes alive now. 480 * 481 * SCTP_FADDRS_UNREACH: there is no suitable source address to send to 482 * this peer address. For example, the peer address is v6 but we only 483 * have v4 addresses. It is marked unreachable until there is an 484 * address configuration change. At that time, mark these addresses 485 * as unconfirmed and try again to see if those unreachable addresses 486 * are OK as we may have more source addresses. 487 */ 488 typedef enum { 489 SCTP_FADDRS_UNREACH, 490 SCTP_FADDRS_DOWN, 491 SCTP_FADDRS_ALIVE, 492 SCTP_FADDRS_UNCONFIRMED 493 } faddr_state_t; 494 495 typedef struct sctp_faddr_s { 496 struct sctp_faddr_s *next; 497 faddr_state_t state; 498 499 in6_addr_t faddr; 500 in6_addr_t saddr; 501 502 int64_t hb_expiry; /* time to retransmit heartbeat */ 503 uint32_t hb_interval; /* the heartbeat interval */ 504 505 int rto; /* RTO in tick */ 506 int srtt; /* Smoothed RTT in tick */ 507 int rttvar; /* RTT variance in tick */ 508 uint32_t rtt_updates; 509 int strikes; 510 int max_retr; 511 uint32_t sfa_pmss; 512 uint32_t cwnd; 513 uint32_t ssthresh; 514 uint32_t suna; /* sent - unack'ed */ 515 uint32_t pba; /* partial bytes acked */ 516 uint32_t acked; 517 int64_t lastactive; 518 mblk_t *timer_mp; /* retransmission timer control */ 519 uint32_t 520 hb_pending : 1, 521 timer_running : 1, 522 df : 1, 523 pmtu_discovered : 1, 524 525 rc_timer_running : 1, 526 isv4 : 1, 527 hb_enabled : 1; 528 529 mblk_t *rc_timer_mp; /* reliable control chunk timer */ 530 ire_t *ire; /* cached IRE */ 531 uint32_t T3expire; /* # of times T3 timer expired */ 532 533 uint64_t hb_secret; /* per addr "secret" in heartbeat */ 534 uint32_t rxt_unacked; /* # unack'ed retransmitted bytes */ 535 } sctp_faddr_t; 536 537 /* Flags to indicate supported address type in the PARM_SUP_ADDRS. */ 538 #define PARM_SUPP_V6 0x1 539 #define PARM_SUPP_V4 0x2 540 541 /* 542 * Set heartbeat interval plus jitter. The jitter is supposed to be random, 543 * up to +/- 50% of the RTO. We use gethrtime() here for performance reason 544 * as the jitter does not really need to be "very" random. 545 */ 546 #define SET_HB_INTVL(fp) \ 547 ((fp)->hb_interval + (fp)->rto + ((fp)->rto >> 1) - \ 548 (uint_t)gethrtime() % (fp)->rto) 549 550 #define SCTP_IPIF_HASH 16 551 552 typedef struct sctp_ipif_hash_s { 553 list_t sctp_ipif_list; 554 int ipif_count; 555 } sctp_ipif_hash_t; 556 557 558 /* 559 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is 560 * either sctp_slow_start_initial or sctp_slow_start_after idle 561 * depending on the caller. 562 */ 563 #define SET_CWND(fp, mss, def_max_init_cwnd) \ 564 { \ 565 (fp)->cwnd = MIN(def_max_init_cwnd * (mss), \ 566 MIN(4 * (mss), MAX(2 * (mss), 4380 / (mss) * (mss)))); \ 567 } 568 569 570 struct sctp_s; 571 572 /* 573 * Control structure for each open SCTP stream, 574 * defined only within the kernel or for a kmem user. 575 * NOTE: sctp_reinit_values MUST have a line for each field in this structure! 576 */ 577 #if (defined(_KERNEL) || defined(_KMEMUSER)) 578 579 typedef struct sctp_s { 580 581 /* 582 * The following is shared with (and duplicated) in IP, so if you 583 * make changes, make sure you also change things in ip_sctp.c. 584 */ 585 struct sctp_s *sctp_conn_hash_next; 586 struct sctp_s *sctp_conn_hash_prev; 587 588 struct sctp_s *sctp_listen_hash_next; 589 struct sctp_s *sctp_listen_hash_prev; 590 591 sctp_tf_t *sctp_listen_tfp; /* Ptr to tf */ 592 sctp_tf_t *sctp_conn_tfp; /* Ptr to tf */ 593 594 /* Global list of sctp */ 595 list_node_t sctp_list; 596 597 sctp_faddr_t *sctp_faddrs; 598 int sctp_nfaddrs; 599 sctp_ipif_hash_t sctp_saddrs[SCTP_IPIF_HASH]; 600 int sctp_nsaddrs; 601 602 /* 603 * These fields contain the same information as sctp_sctph->th_*port. 604 * However, the lookup functions can not use the header fields 605 * since during IP option manipulation the sctp_sctph pointer 606 * changes. 607 */ 608 union { 609 struct { 610 in_port_t sctpu_fport; /* Remote port */ 611 in_port_t sctpu_lport; /* Local port */ 612 } sctpu_ports1; 613 uint32_t sctpu_ports2; /* Rem port, */ 614 /* local port */ 615 /* Used for SCTP_MATCH performance */ 616 } sctp_sctpu; 617 #define sctp_fport sctp_sctpu.sctpu_ports1.sctpu_fport 618 #define sctp_lport sctp_sctpu.sctpu_ports1.sctpu_lport 619 #define sctp_ports sctp_sctpu.sctpu_ports2 620 621 kmutex_t sctp_lock; 622 kcondvar_t sctp_cv; 623 boolean_t sctp_running; 624 625 #define sctp_ulpd sctp_connp->conn_upper_handle 626 #define sctp_upcalls sctp_connp->conn_upcalls 627 628 #define sctp_ulp_newconn sctp_upcalls->su_newconn 629 #define sctp_ulp_connected sctp_upcalls->su_connected 630 #define sctp_ulp_disconnected sctp_upcalls->su_disconnected 631 #define sctp_ulp_opctl sctp_upcalls->su_opctl 632 #define sctp_ulp_recv sctp_upcalls->su_recv 633 #define sctp_ulp_xmitted sctp_upcalls->su_txq_full 634 #define sctp_ulp_prop sctp_upcalls->su_set_proto_props 635 636 int32_t sctp_state; 637 638 conn_t *sctp_connp; /* conn_t stuff */ 639 #define sctp_zoneid sctp_connp->conn_zoneid 640 #define sctp_allzones sctp_connp->conn_allzones 641 #define sctp_mac_exempt sctp_connp->conn_mac_exempt 642 #define sctp_credp sctp_connp->conn_cred 643 #define sctp_reuseaddr sctp_connp->conn_reuseaddr 644 645 sctp_stack_t *sctp_sctps; 646 647 /* Peer address tracking */ 648 sctp_faddr_t *sctp_lastfaddr; /* last faddr in list */ 649 sctp_faddr_t *sctp_primary; /* primary faddr */ 650 sctp_faddr_t *sctp_current; /* current faddr */ 651 sctp_faddr_t *sctp_lastdata; /* last data seen from this */ 652 653 /* Outbound data tracking */ 654 mblk_t *sctp_xmit_head; 655 mblk_t *sctp_xmit_tail; 656 mblk_t *sctp_xmit_unsent; 657 mblk_t *sctp_xmit_unsent_tail; 658 mblk_t *sctp_xmit_unacked; 659 660 int32_t sctp_unacked; /* # of unacked bytes */ 661 int32_t sctp_unsent; /* # of unsent bytes in hand */ 662 663 uint32_t sctp_ltsn; /* Local instance TSN */ 664 uint32_t sctp_lastack_rxd; /* Last rx'd cumtsn */ 665 uint32_t sctp_recovery_tsn; /* Exit from fast recovery */ 666 uint32_t sctp_adv_pap; /* Adv. Peer Ack Point */ 667 668 uint16_t sctp_num_ostr; 669 uint16_t *sctp_ostrcntrs; 670 671 mblk_t *sctp_pad_mp; /* pad unaligned data chunks */ 672 673 /* sendmsg() default parameters */ 674 uint16_t sctp_def_stream; /* default stream id */ 675 uint16_t sctp_def_flags; /* default xmit flags */ 676 uint32_t sctp_def_ppid; /* default payload id */ 677 uint32_t sctp_def_context; /* default context */ 678 uint32_t sctp_def_timetolive; /* default msg TTL */ 679 680 /* Inbound data tracking */ 681 sctp_set_t *sctp_sack_info; /* Sack tracking */ 682 mblk_t *sctp_ack_mp; /* Delayed ACK timer block */ 683 sctp_instr_t *sctp_instr; /* Instream trackers */ 684 mblk_t *sctp_uo_frags; /* Un-ordered msg. fragments */ 685 uint32_t sctp_ftsn; /* Peer's TSN */ 686 uint32_t sctp_lastacked; /* last cumtsn SACKd */ 687 uint16_t sctp_num_istr; /* No. of instreams */ 688 int32_t sctp_istr_nmsgs; /* No. of chunks in instreams */ 689 int32_t sctp_sack_gaps; /* No. of received gaps */ 690 int32_t sctp_sack_toggle; /* SACK every other pkt */ 691 692 /* RTT calculation */ 693 uint32_t sctp_rtt_tsn; 694 int64_t sctp_out_time; 695 696 /* Stats can be reset by snmp users kstat, netstat and snmp agents */ 697 uint64_t sctp_opkts; /* sent pkts */ 698 uint64_t sctp_obchunks; /* sent control chunks */ 699 uint64_t sctp_odchunks; /* sent ordered data chunks */ 700 uint64_t sctp_oudchunks; /* sent unord data chunks */ 701 uint64_t sctp_rxtchunks; /* retransmitted chunks */ 702 uint64_t sctp_ipkts; /* recv pkts */ 703 uint64_t sctp_ibchunks; /* recv control chunks */ 704 uint64_t sctp_idchunks; /* recv ordered data chunks */ 705 uint64_t sctp_iudchunks; /* recv unord data chunks */ 706 uint64_t sctp_fragdmsgs; 707 uint64_t sctp_reassmsgs; 708 uint32_t sctp_T1expire; /* # of times T1timer expired */ 709 uint32_t sctp_T2expire; /* # of times T2timer expired */ 710 uint32_t sctp_T3expire; /* # of times T3timer expired */ 711 uint32_t sctp_assoc_start_time; /* time when assoc was est. */ 712 713 /* Outbound flow control */ 714 int32_t sctp_xmit_hiwater; /* Send high water mark */ 715 int32_t sctp_xmit_lowater; /* Send low water mark */ 716 uint32_t sctp_frwnd; /* Peer RWND */ 717 uint32_t sctp_cwnd_max; 718 719 /* Inbound flow control */ 720 int32_t sctp_rwnd; /* Current receive window */ 721 int32_t sctp_irwnd; /* Initial receive window */ 722 int32_t sctp_rxqueued; /* No. of bytes in RX q's */ 723 724 /* Pre-initialized composite headers */ 725 char *sctp_iphc; /* v4 sctp/ip hdr template buffer */ 726 char *sctp_iphc6; /* v6 sctp/ip hdr template buffer */ 727 728 int32_t sctp_iphc_len; /* actual allocated v4 buffer size */ 729 int32_t sctp_iphc6_len; /* actual allocated v6 buffer size */ 730 731 int32_t sctp_hdr_len; /* len of combined SCTP/IP v4 hdr */ 732 int32_t sctp_hdr6_len; /* len of combined SCTP/IP v6 hdr */ 733 734 ipha_t *sctp_ipha; /* IPv4 header in the buffer */ 735 ip6_t *sctp_ip6h; /* IPv6 header in the buffer */ 736 737 int32_t sctp_ip_hdr_len; /* Byte len of our current v4 hdr */ 738 int32_t sctp_ip_hdr6_len; /* Byte len of our current v6 hdr */ 739 740 sctp_hdr_t *sctp_sctph; /* sctp header in combined v4 hdr */ 741 sctp_hdr_t *sctp_sctph6; /* sctp header in combined v6 hdr */ 742 743 uint32_t sctp_lvtag; /* local SCTP instance verf tag */ 744 uint32_t sctp_fvtag; /* Peer's SCTP verf tag */ 745 746 /* Path MTU Discovery */ 747 int64_t sctp_last_mtu_probe; 748 clock_t sctp_mtu_probe_intvl; 749 uint32_t sctp_mss; /* Max send size (not TCP MSS!) */ 750 751 /* structs sctp_bits, sctp_events are for clearing all bits at once */ 752 struct { 753 uint32_t 754 755 sctp_understands_asconf : 1, /* Peer handles ASCONF chunks */ 756 sctp_debug : 1, /* SO_DEBUG "socket" option. */ 757 sctp_cchunk_pend : 1, /* Control chunk in flight. */ 758 sctp_dgram_errind : 1, /* SO_DGRAM_ERRIND option */ 759 760 sctp_linger : 1, /* SO_LINGER turned on */ 761 sctp_lingering : 1, /* Lingering in close */ 762 sctp_loopback: 1, /* src and dst are the same machine */ 763 sctp_force_sack : 1, 764 765 sctp_ack_timer_running: 1, /* Delayed ACK timer running */ 766 sctp_recvdstaddr : 1, /* return T_EXTCONN_IND with dstaddr */ 767 sctp_hwcksum : 1, /* The NIC is capable of hwcksum */ 768 sctp_understands_addip : 1, 769 770 sctp_bound_to_all : 1, 771 sctp_cansleep : 1, /* itf routines can sleep */ 772 sctp_detached : 1, /* If we're detached from a stream */ 773 sctp_send_adaptation : 1, /* send adaptation layer ind */ 774 775 sctp_recv_adaptation : 1, /* recv adaptation layer ind */ 776 sctp_ndelay : 1, /* turn off Nagle */ 777 sctp_condemned : 1, /* this sctp is about to disappear */ 778 sctp_chk_fast_rexmit : 1, /* check for fast rexmit message */ 779 780 sctp_prsctp_aware : 1, /* is peer PR-SCTP aware? */ 781 sctp_linklocal : 1, /* is linklocal assoc. */ 782 sctp_rexmitting : 1, /* SCTP is retransmitting */ 783 sctp_zero_win_probe : 1, /* doing zero win probe */ 784 785 sctp_txq_full : 1, /* the tx queue is full */ 786 sctp_ulp_discon_done : 1, /* ulp_disconnecting done */ 787 sctp_dummy : 6; 788 } sctp_bits; 789 struct { 790 uint32_t 791 792 sctp_recvsndrcvinfo : 1, 793 sctp_recvassocevnt : 1, 794 sctp_recvpathevnt : 1, 795 sctp_recvsendfailevnt : 1, 796 797 sctp_recvpeererr : 1, 798 sctp_recvshutdownevnt : 1, 799 sctp_recvpdevnt : 1, 800 sctp_recvalevnt : 1; 801 } sctp_events; 802 #define sctp_priv_stream sctp_bits.sctp_priv_stream 803 #define sctp_understands_asconf sctp_bits.sctp_understands_asconf 804 #define sctp_debug sctp_bits.sctp_debug 805 #define sctp_cchunk_pend sctp_bits.sctp_cchunk_pend 806 #define sctp_dgram_errind sctp_bits.sctp_dgram_errind 807 #define sctp_linger sctp_bits.sctp_linger 808 #define sctp_lingering sctp_bits.sctp_lingering 809 #define sctp_loopback sctp_bits.sctp_loopback 810 #define sctp_force_sack sctp_bits.sctp_force_sack 811 #define sctp_ack_timer_running sctp_bits.sctp_ack_timer_running 812 #define sctp_recvdstaddr sctp_bits.sctp_recvdstaddr 813 #define sctp_hwcksum sctp_bits.sctp_hwcksum 814 #define sctp_understands_addip sctp_bits.sctp_understands_addip 815 #define sctp_bound_to_all sctp_bits.sctp_bound_to_all 816 #define sctp_cansleep sctp_bits.sctp_cansleep 817 #define sctp_detached sctp_bits.sctp_detached 818 #define sctp_send_adaptation sctp_bits.sctp_send_adaptation 819 #define sctp_recv_adaptation sctp_bits.sctp_recv_adaptation 820 #define sctp_ndelay sctp_bits.sctp_ndelay 821 #define sctp_condemned sctp_bits.sctp_condemned 822 #define sctp_chk_fast_rexmit sctp_bits.sctp_chk_fast_rexmit 823 #define sctp_prsctp_aware sctp_bits.sctp_prsctp_aware 824 #define sctp_linklocal sctp_bits.sctp_linklocal 825 #define sctp_rexmitting sctp_bits.sctp_rexmitting 826 #define sctp_zero_win_probe sctp_bits.sctp_zero_win_probe 827 #define sctp_txq_full sctp_bits.sctp_txq_full 828 #define sctp_ulp_discon_done sctp_bits.sctp_ulp_discon_done 829 830 #define sctp_recvsndrcvinfo sctp_events.sctp_recvsndrcvinfo 831 #define sctp_recvassocevnt sctp_events.sctp_recvassocevnt 832 #define sctp_recvpathevnt sctp_events.sctp_recvpathevnt 833 #define sctp_recvsendfailevnt sctp_events.sctp_recvsendfailevnt 834 #define sctp_recvpeererr sctp_events.sctp_recvpeererr 835 #define sctp_recvshutdownevnt sctp_events.sctp_recvshutdownevnt 836 #define sctp_recvpdevnt sctp_events.sctp_recvpdevnt 837 #define sctp_recvalevnt sctp_events.sctp_recvalevnt 838 839 /* Retransmit info */ 840 mblk_t *sctp_cookie_mp; /* cookie chunk, if rxt needed */ 841 int32_t sctp_strikes; /* Total number of assoc strikes */ 842 int32_t sctp_max_init_rxt; 843 int32_t sctp_pa_max_rxt; /* Max per-assoc retransmit cnt */ 844 int32_t sctp_pp_max_rxt; /* Max per-path retransmit cnt */ 845 uint32_t sctp_rto_max; 846 uint32_t sctp_init_rto_max; 847 uint32_t sctp_rto_min; 848 uint32_t sctp_rto_initial; 849 850 int64_t sctp_last_secret_update; 851 uint8_t sctp_secret[SCTP_SECRET_LEN]; /* for cookie auth */ 852 uint8_t sctp_old_secret[SCTP_SECRET_LEN]; 853 uint32_t sctp_cookie_lifetime; /* cookie lifetime in tick */ 854 855 /* 856 * Address family that app wishes returned addrsses to be in. 857 * Currently taken from address family used in T_BIND_REQ, but 858 * should really come from family used in original socket() call. 859 * Value can be AF_INET or AF_INET6. 860 */ 861 uint_t sctp_family; 862 ushort_t sctp_ipversion; 863 864 /* Bind hash tables */ 865 kmutex_t *sctp_bind_lockp; /* Ptr to tf_lock */ 866 struct sctp_s *sctp_bind_hash; 867 struct sctp_s **sctp_ptpbhn; 868 869 /* Shutdown / cleanup */ 870 sctp_faddr_t *sctp_shutdown_faddr; /* rotate faddr during shutd */ 871 int32_t sctp_client_errno; /* How the client screwed up */ 872 int sctp_lingertime; /* Close linger time (in seconds) */ 873 kmutex_t sctp_reflock; /* Protects sctp_refcnt & timer mp */ 874 ushort_t sctp_refcnt; /* No. of pending upstream msg */ 875 mblk_t *sctp_timer_mp; /* List of fired timers. */ 876 877 /* Misc */ 878 uint_t sctp_bound_if; /* IPV6_BOUND_IF */ 879 880 mblk_t *sctp_heartbeat_mp; /* Timer block for heartbeats */ 881 uint32_t sctp_hb_interval; /* Default hb_interval */ 882 883 int32_t sctp_autoclose; /* Auto disconnect in ticks */ 884 int64_t sctp_active; /* Last time data/sack on this conn */ 885 uint32_t sctp_tx_adaptation_code; /* TX adaptation code */ 886 uint32_t sctp_rx_adaptation_code; /* RX adaptation code */ 887 888 /* Reliable control chunks */ 889 mblk_t *sctp_cxmit_list; /* Xmit list for control chunks */ 890 uint32_t sctp_lcsn; /* Our serial number */ 891 uint32_t sctp_fcsn; /* Peer serial number */ 892 893 /* Per association receive queue */ 894 kmutex_t sctp_recvq_lock; 895 mblk_t *sctp_recvq; 896 mblk_t *sctp_recvq_tail; 897 taskq_t *sctp_recvq_tq; 898 899 /* Send queue to IP */ 900 kmutex_t sctp_sendq_lock; 901 mblk_t *sctp_sendq; 902 mblk_t *sctp_sendq_tail; 903 boolean_t sctp_sendq_sending; 904 905 /* IPv6 ancillary data */ 906 uint_t sctp_ipv6_recvancillary; /* flags */ 907 #define SCTP_IPV6_RECVPKTINFO 0x01 /* IPV6_RECVPKTINFO opt */ 908 #define SCTP_IPV6_RECVHOPLIMIT 0x02 /* IPV6_RECVHOPLIMIT opt */ 909 #define SCTP_IPV6_RECVHOPOPTS 0x04 /* IPV6_RECVHOPOPTS opt */ 910 #define SCTP_IPV6_RECVDSTOPTS 0x08 /* IPV6_RECVDSTOPTS opt */ 911 #define SCTP_IPV6_RECVRTHDR 0x10 /* IPV6_RECVRTHDR opt */ 912 #define SCTP_IPV6_RECVRTDSTOPTS 0x20 /* IPV6_RECVRTHDRDSTOPTS opt */ 913 914 uint_t sctp_recvifindex; /* last rcvd IPV6_RCVPKTINFO */ 915 uint_t sctp_recvhops; /* " IPV6_RECVHOPLIMIT */ 916 ip6_hbh_t *sctp_hopopts; /* " IPV6_RECVHOPOPTS */ 917 ip6_dest_t *sctp_dstopts; /* " IPV6_RECVDSTOPTS */ 918 ip6_dest_t *sctp_rtdstopts; /* " IPV6_RECVRTHDRDSTOPTS */ 919 ip6_rthdr_t *sctp_rthdr; /* " IPV6_RECVRTHDR */ 920 uint_t sctp_hopoptslen; 921 uint_t sctp_dstoptslen; 922 uint_t sctp_rtdstoptslen; 923 uint_t sctp_rthdrlen; 924 925 ip6_pkt_t sctp_sticky_ipp; /* Sticky options */ 926 #define sctp_ipp_fields sctp_sticky_ipp.ipp_fields 927 #define sctp_ipp_ifindex sctp_sticky_ipp.ipp_ifindex 928 #define sctp_ipp_addr sctp_sticky_ipp.ipp_addr 929 #define sctp_ipp_hoplimit sctp_sticky_ipp.ipp_hoplimit 930 #define sctp_ipp_hopoptslen sctp_sticky_ipp.ipp_hopoptslen 931 #define sctp_ipp_rtdstoptslen sctp_sticky_ipp.ipp_rtdstoptslen 932 #define sctp_ipp_rthdrlen sctp_sticky_ipp.ipp_rthdrlen 933 #define sctp_ipp_dstoptslen sctp_sticky_ipp.ipp_dstoptslen 934 #define sctp_ipp_hopopts sctp_sticky_ipp.ipp_hopopts 935 #define sctp_ipp_rtdstopts sctp_sticky_ipp.ipp_rtdstopts 936 #define sctp_ipp_rthdr sctp_sticky_ipp.ipp_rthdr 937 #define sctp_ipp_dstopts sctp_sticky_ipp.ipp_dstopts 938 #define sctp_ipp_pathmtu sctp_sticky_ipp.ipp_pathmtu 939 #define sctp_ipp_nexthop sctp_sticky_ipp.ipp_nexthop 940 /* Stats */ 941 uint64_t sctp_msgcount; 942 uint64_t sctp_prsctpdrop; 943 944 uint_t sctp_v4label_len; /* length of cached v4 label */ 945 uint_t sctp_v6label_len; /* length of cached v6 label */ 946 uint32_t sctp_rxt_nxttsn; /* Next TSN to be rexmitted */ 947 uint32_t sctp_rxt_maxtsn; /* Max TSN sent at time out */ 948 949 int sctp_pd_point; /* Partial delivery point */ 950 mblk_t *sctp_err_chunks; /* Error chunks */ 951 uint32_t sctp_err_len; /* Total error chunks length */ 952 953 pid_t sctp_cpid; /* Process id when this was opened */ 954 uint64_t sctp_open_time; /* time when this was opened */ 955 956 /* additional source data for per endpoint association statistics */ 957 uint64_t sctp_outseqtsns; /* TSN rx > expected TSN */ 958 uint64_t sctp_osacks; /* total sacks sent */ 959 uint64_t sctp_isacks; /* total sacks received */ 960 uint64_t sctp_idupchunks; /* rx dups, ord or unord */ 961 uint64_t sctp_gapcnt; /* total gap acks rx */ 962 /* 963 * Add the current data from the counters which are reset by snmp 964 * to these cumulative counters to use in per endpoint statistics. 965 */ 966 uint64_t sctp_cum_obchunks; /* sent control chunks */ 967 uint64_t sctp_cum_odchunks; /* sent ordered data chunks */ 968 uint64_t sctp_cum_oudchunks; /* sent unord data chunks */ 969 uint64_t sctp_cum_rxtchunks; /* retransmitted chunks */ 970 uint64_t sctp_cum_ibchunks; /* recv control chunks */ 971 uint64_t sctp_cum_idchunks; /* recv ordered data chunks */ 972 uint64_t sctp_cum_iudchunks; /* recv unord data chunks */ 973 974 /* 975 * When non-zero, this is the maximum observed RTO since assoc stats 976 * were last requested. When zero, no RTO update has occurred since 977 * the previous user request for stats on this endpoint. 978 */ 979 int sctp_maxrto; 980 /* 981 * The stored value of sctp_maxrto passed to user during the previous 982 * user request for stats on this endpoint. 983 */ 984 int sctp_prev_maxrto; 985 } sctp_t; 986 987 #define SCTP_TXQ_LEN(sctp) ((sctp)->sctp_unsent + (sctp)->sctp_unacked) 988 #define SCTP_TXQ_UPDATE(sctp) \ 989 if ((sctp)->sctp_txq_full && SCTP_TXQ_LEN(sctp) <= \ 990 (sctp)->sctp_xmit_lowater) { \ 991 (sctp)->sctp_txq_full = 0; \ 992 (sctp)->sctp_ulp_xmitted((sctp)->sctp_ulpd, \ 993 B_FALSE); \ 994 } 995 996 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 997 998 extern void sctp_ack_timer(sctp_t *); 999 extern size_t sctp_adaptation_code_param(sctp_t *, uchar_t *); 1000 extern void sctp_adaptation_event(sctp_t *); 1001 extern void sctp_add_err(sctp_t *, uint16_t, void *, size_t, 1002 sctp_faddr_t *); 1003 extern int sctp_add_faddr(sctp_t *, in6_addr_t *, int, boolean_t); 1004 extern boolean_t sctp_add_ftsn_set(sctp_ftsn_set_t **, sctp_faddr_t *, mblk_t *, 1005 uint_t *, uint32_t *); 1006 extern boolean_t sctp_add_recvq(sctp_t *, mblk_t *, boolean_t); 1007 extern void sctp_add_sendq(sctp_t *, mblk_t *); 1008 extern void sctp_add_unrec_parm(sctp_parm_hdr_t *, mblk_t **, boolean_t); 1009 extern size_t sctp_addr_params(sctp_t *, int, uchar_t *, boolean_t); 1010 extern mblk_t *sctp_add_proto_hdr(sctp_t *, sctp_faddr_t *, mblk_t *, int, 1011 int *); 1012 extern void sctp_addr_req(sctp_t *, mblk_t *); 1013 extern sctp_t *sctp_addrlist2sctp(mblk_t *, sctp_hdr_t *, sctp_chunk_hdr_t *, 1014 zoneid_t, sctp_stack_t *); 1015 extern void sctp_add_hdr(sctp_t *, uchar_t *, size_t); 1016 extern void sctp_check_adv_ack_pt(sctp_t *, mblk_t *, mblk_t *); 1017 extern void sctp_assoc_event(sctp_t *, uint16_t, uint16_t, 1018 sctp_chunk_hdr_t *); 1019 1020 extern void sctp_bind_hash_insert(sctp_tf_t *, sctp_t *, int); 1021 extern void sctp_bind_hash_remove(sctp_t *); 1022 extern int sctp_bindi(sctp_t *, in_port_t, boolean_t, int, in_port_t *); 1023 extern int sctp_bind_add(sctp_t *, const void *, uint32_t, boolean_t, 1024 in_port_t); 1025 extern int sctp_bind_del(sctp_t *, const void *, uint32_t, boolean_t); 1026 extern int sctp_build_hdrs(sctp_t *); 1027 1028 extern int sctp_check_abandoned_msg(sctp_t *, mblk_t *); 1029 extern void sctp_clean_death(sctp_t *, int); 1030 extern void sctp_close_eager(sctp_t *); 1031 extern int sctp_compare_faddrsets(sctp_faddr_t *, sctp_faddr_t *); 1032 extern void sctp_congest_reset(sctp_t *); 1033 extern void sctp_conn_hash_insert(sctp_tf_t *, sctp_t *, int); 1034 extern void sctp_conn_hash_remove(sctp_t *); 1035 extern void sctp_conn_init(conn_t *); 1036 extern sctp_t *sctp_conn_match(in6_addr_t *, in6_addr_t *, uint32_t, 1037 zoneid_t, sctp_stack_t *); 1038 extern sctp_t *sctp_conn_request(sctp_t *, mblk_t *, uint_t, uint_t, 1039 sctp_init_chunk_t *, mblk_t *); 1040 extern int sctp_conprim_opt_process(queue_t *, mblk_t *, int *, int *, 1041 int *); 1042 extern uint32_t sctp_cumack(sctp_t *, uint32_t, mblk_t **); 1043 extern sctp_t *sctp_create_eager(sctp_t *); 1044 1045 extern void sctp_dispatch_rput(queue_t *, sctp_t *, sctp_hdr_t *, mblk_t *, 1046 uint_t, uint_t, in6_addr_t); 1047 extern char *sctp_display(sctp_t *, char *); 1048 extern void sctp_display_all(sctp_stack_t *); 1049 1050 extern void sctp_error_event(sctp_t *, sctp_chunk_hdr_t *); 1051 1052 extern void sctp_faddr_alive(sctp_t *, sctp_faddr_t *); 1053 extern int sctp_faddr_dead(sctp_t *, sctp_faddr_t *, int); 1054 extern void sctp_faddr_fini(void); 1055 extern void sctp_faddr_init(void); 1056 extern void sctp_fast_rexmit(sctp_t *); 1057 extern void sctp_fill_sack(sctp_t *, unsigned char *, int); 1058 extern void sctp_free_faddr_timers(sctp_t *); 1059 extern void sctp_free_ftsn_set(sctp_ftsn_set_t *); 1060 extern void sctp_free_msg(mblk_t *); 1061 extern void sctp_free_reass(sctp_instr_t *); 1062 extern void sctp_free_set(sctp_set_t *); 1063 extern void sctp_ftsn_sets_fini(void); 1064 extern void sctp_ftsn_sets_init(void); 1065 1066 extern int sctp_get_addrlist(sctp_t *, const void *, uint32_t *, 1067 uchar_t **, int *, size_t *); 1068 extern void sctp_g_q_inactive(sctp_stack_t *); 1069 extern int sctp_get_addrparams(sctp_t *, sctp_t *, mblk_t *, 1070 sctp_chunk_hdr_t *, uint_t *); 1071 extern void sctp_get_ire(sctp_t *, sctp_faddr_t *); 1072 extern void sctp_get_faddr_list(sctp_t *, uchar_t *, size_t); 1073 extern mblk_t *sctp_get_first_sent(sctp_t *); 1074 extern mblk_t *sctp_get_msg_to_send(sctp_t *, mblk_t **, mblk_t *, int *, 1075 int32_t, uint32_t, sctp_faddr_t *); 1076 extern void sctp_get_saddr_list(sctp_t *, uchar_t *, size_t); 1077 1078 extern int sctp_handle_error(sctp_t *, sctp_hdr_t *, sctp_chunk_hdr_t *, 1079 mblk_t *); 1080 extern void sctp_hash_destroy(sctp_stack_t *); 1081 extern void sctp_hash_init(sctp_stack_t *); 1082 extern int sctp_header_init_ipv4(sctp_t *, int); 1083 extern int sctp_header_init_ipv6(sctp_t *, int); 1084 extern void sctp_heartbeat_timer(sctp_t *); 1085 1086 extern void sctp_icmp_error(sctp_t *, mblk_t *); 1087 extern void sctp_inc_taskq(sctp_stack_t *); 1088 extern void sctp_info_req(sctp_t *, mblk_t *); 1089 extern mblk_t *sctp_init_mp(sctp_t *); 1090 extern boolean_t sctp_initialize_params(sctp_t *, sctp_init_chunk_t *, 1091 sctp_init_chunk_t *); 1092 extern uint32_t sctp_init2vtag(sctp_chunk_hdr_t *); 1093 extern void sctp_intf_event(sctp_t *, in6_addr_t, int, int); 1094 extern void sctp_input_data(sctp_t *, mblk_t *, mblk_t *); 1095 extern void sctp_instream_cleanup(sctp_t *, boolean_t); 1096 extern int sctp_is_a_faddr_clean(sctp_t *); 1097 1098 extern void *sctp_kstat_init(netstackid_t); 1099 extern void sctp_kstat_fini(netstackid_t, kstat_t *); 1100 extern void *sctp_kstat2_init(netstackid_t, sctp_kstat_t *); 1101 extern void sctp_kstat2_fini(netstackid_t, kstat_t *); 1102 1103 extern ssize_t sctp_link_abort(mblk_t *, uint16_t, char *, size_t, int, 1104 boolean_t); 1105 extern void sctp_listen_hash_insert(sctp_tf_t *, sctp_t *); 1106 extern void sctp_listen_hash_remove(sctp_t *); 1107 extern sctp_t *sctp_lookup(sctp_t *, in6_addr_t *, sctp_tf_t *, uint32_t *, 1108 int); 1109 extern sctp_faddr_t *sctp_lookup_faddr(sctp_t *, in6_addr_t *); 1110 1111 extern mblk_t *sctp_make_err(sctp_t *, uint16_t, void *, size_t); 1112 extern mblk_t *sctp_make_ftsn_chunk(sctp_t *, sctp_faddr_t *, 1113 sctp_ftsn_set_t *, uint_t, uint32_t); 1114 extern void sctp_make_ftsns(sctp_t *, mblk_t *, mblk_t *, mblk_t **, 1115 sctp_faddr_t *, uint32_t *); 1116 extern mblk_t *sctp_make_mp(sctp_t *, sctp_faddr_t *, int); 1117 extern mblk_t *sctp_make_sack(sctp_t *, sctp_faddr_t *, mblk_t *); 1118 extern void sctp_maxpsz_set(sctp_t *); 1119 extern void sctp_move_faddr_timers(queue_t *, sctp_t *); 1120 1121 extern void sctp_nd_free(sctp_stack_t *); 1122 extern int sctp_nd_getset(queue_t *, MBLKP); 1123 extern boolean_t sctp_nd_init(sctp_stack_t *); 1124 extern sctp_parm_hdr_t *sctp_next_parm(sctp_parm_hdr_t *, ssize_t *); 1125 1126 extern void sctp_ootb_shutdown_ack(sctp_t *, mblk_t *, uint_t); 1127 extern size_t sctp_options_param(const sctp_t *, void *, int); 1128 extern size_t sctp_options_param_len(const sctp_t *, int); 1129 extern void sctp_output(sctp_t *, uint_t); 1130 1131 extern boolean_t sctp_param_register(IDP *, sctpparam_t *, int, sctp_stack_t *); 1132 extern void sctp_partial_delivery_event(sctp_t *); 1133 extern int sctp_process_cookie(sctp_t *, sctp_chunk_hdr_t *, mblk_t *, 1134 sctp_init_chunk_t **, sctp_hdr_t *, int *, in6_addr_t *); 1135 extern void sctp_process_err(sctp_t *); 1136 extern void sctp_process_heartbeat(sctp_t *, sctp_chunk_hdr_t *); 1137 extern void sctp_process_sendq(sctp_t *); 1138 extern void sctp_process_timer(sctp_t *); 1139 1140 extern void sctp_redo_faddr_srcs(sctp_t *); 1141 extern void sctp_regift_xmitlist(sctp_t *); 1142 extern void sctp_return_heartbeat(sctp_t *, sctp_chunk_hdr_t *, mblk_t *); 1143 extern void sctp_rexmit(sctp_t *, sctp_faddr_t *); 1144 extern mblk_t *sctp_rexmit_packet(sctp_t *, mblk_t **, mblk_t **, 1145 sctp_faddr_t *, uint_t *); 1146 extern void sctp_rexmit_timer(sctp_t *, sctp_faddr_t *); 1147 extern sctp_faddr_t *sctp_rotate_faddr(sctp_t *, sctp_faddr_t *); 1148 1149 extern boolean_t sctp_sack(sctp_t *, mblk_t *); 1150 extern int sctp_secure_restart_check(mblk_t *, sctp_chunk_hdr_t *, 1151 uint32_t, int, sctp_stack_t *); 1152 extern void sctp_send_abort(sctp_t *, uint32_t, uint16_t, char *, size_t, 1153 mblk_t *, int, boolean_t); 1154 extern void sctp_send_cookie_ack(sctp_t *); 1155 extern void sctp_send_cookie_echo(sctp_t *, sctp_chunk_hdr_t *, mblk_t *); 1156 extern void sctp_send_initack(sctp_t *, sctp_hdr_t *, sctp_chunk_hdr_t *, 1157 mblk_t *); 1158 extern void sctp_send_shutdown(sctp_t *, int); 1159 extern void sctp_send_heartbeat(sctp_t *, sctp_faddr_t *); 1160 extern void sctp_sendfail_event(sctp_t *, mblk_t *, int, boolean_t); 1161 extern void sctp_set_faddr_current(sctp_t *, sctp_faddr_t *); 1162 extern int sctp_set_hdraddrs(sctp_t *); 1163 extern void sctp_set_saddr(sctp_t *, sctp_faddr_t *); 1164 extern void sctp_sets_init(void); 1165 extern void sctp_sets_fini(void); 1166 extern void sctp_shutdown_event(sctp_t *); 1167 extern void sctp_stop_faddr_timers(sctp_t *); 1168 extern int sctp_shutdown_received(sctp_t *, sctp_chunk_hdr_t *, boolean_t, 1169 boolean_t, sctp_faddr_t *); 1170 extern void sctp_shutdown_complete(sctp_t *); 1171 extern void sctp_set_if_mtu(sctp_t *); 1172 extern void sctp_set_iplen(sctp_t *, mblk_t *); 1173 extern void sctp_set_ulp_prop(sctp_t *); 1174 extern void sctp_ss_rexmit(sctp_t *); 1175 extern size_t sctp_supaddr_param_len(sctp_t *); 1176 extern size_t sctp_supaddr_param(sctp_t *, uchar_t *); 1177 1178 extern void sctp_timer(sctp_t *, mblk_t *, clock_t); 1179 extern mblk_t *sctp_timer_alloc(sctp_t *, pfv_t, int); 1180 extern void sctp_timer_call(sctp_t *sctp, mblk_t *); 1181 extern void sctp_timer_free(mblk_t *); 1182 extern void sctp_timer_stop(mblk_t *); 1183 extern void sctp_unlink_faddr(sctp_t *, sctp_faddr_t *); 1184 1185 extern void sctp_update_ire(sctp_t *sctp); 1186 extern in_port_t sctp_update_next_port(in_port_t, zone_t *zone, sctp_stack_t *); 1187 extern void sctp_update_rtt(sctp_t *, sctp_faddr_t *, clock_t); 1188 extern void sctp_user_abort(sctp_t *, mblk_t *); 1189 1190 extern void sctp_validate_peer(sctp_t *); 1191 1192 extern void sctp_wput_ioctl(queue_t *, mblk_t *); 1193 1194 extern int sctp_xmit_list_clean(sctp_t *, ssize_t); 1195 1196 extern void sctp_zap_addrs(sctp_t *); 1197 extern void sctp_zap_faddrs(sctp_t *, int); 1198 1199 /* Contract private interface between SCTP and Clustering - PSARC/2005/602 */ 1200 1201 extern void (*cl_sctp_listen)(sa_family_t, uchar_t *, uint_t, in_port_t); 1202 extern void (*cl_sctp_unlisten)(sa_family_t, uchar_t *, uint_t, in_port_t); 1203 extern void (*cl_sctp_connect)(sa_family_t, uchar_t *, uint_t, in_port_t, 1204 uchar_t *, uint_t, in_port_t, boolean_t, cl_sctp_handle_t); 1205 extern void (*cl_sctp_disconnect)(sa_family_t, cl_sctp_handle_t); 1206 extern void (*cl_sctp_assoc_change)(sa_family_t, uchar_t *, size_t, uint_t, 1207 uchar_t *, size_t, uint_t, int, cl_sctp_handle_t); 1208 extern void (*cl_sctp_check_addrs)(sa_family_t, in_port_t, uchar_t **, 1209 size_t, uint_t *, boolean_t); 1210 1211 /* Send a mp to IP. */ 1212 #define IP_PUT(mp, conn, isv4) \ 1213 { \ 1214 sctp_stack_t *sctps = conn->conn_netstack->netstack_sctp; \ 1215 \ 1216 if ((isv4)) \ 1217 ip_output((conn), (mp), WR(sctps->sctps_g_q), IP_WPUT); \ 1218 else \ 1219 ip_output_v6((conn), (mp), WR(sctps->sctps_g_q), IP_WPUT);\ 1220 } 1221 1222 #define RUN_SCTP(sctp) \ 1223 { \ 1224 mutex_enter(&(sctp)->sctp_lock); \ 1225 while ((sctp)->sctp_running) \ 1226 cv_wait(&(sctp)->sctp_cv, &(sctp)->sctp_lock); \ 1227 (sctp)->sctp_running = B_TRUE; \ 1228 mutex_exit(&(sctp)->sctp_lock); \ 1229 } 1230 1231 /* Wake up recvq taskq */ 1232 #define WAKE_SCTP(sctp) \ 1233 { \ 1234 mutex_enter(&(sctp)->sctp_lock); \ 1235 if ((sctp)->sctp_timer_mp != NULL) \ 1236 sctp_process_timer(sctp); \ 1237 (sctp)->sctp_running = B_FALSE; \ 1238 cv_broadcast(&(sctp)->sctp_cv); \ 1239 mutex_exit(&(sctp)->sctp_lock); \ 1240 } 1241 1242 #ifdef __cplusplus 1243 } 1244 #endif 1245 1246 #endif /* _INET_SCTP_SCTP_IMPL_H */ 1247