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