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sys/netinet/sctp_asconf.c
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1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/10.0/sys/netinet/sctp_asconf.c 258454 2013-11-21 23:00:09Z tuexen $"); 35 36 #include <netinet/sctp_os.h> 37 #include <netinet/sctp_var.h> 38 #include <netinet/sctp_sysctl.h> 39 #include <netinet/sctp_pcb.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp_output.h> 43 #include <netinet/sctp_asconf.h> 44 #include <netinet/sctp_timer.h> 45 46 /* 47 * debug flags: 48 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 49 * SCTP_DEBUG_ASCONF2: detailed info 50 */ 51 52 53 /* 54 * RFC 5061 55 * 56 * An ASCONF parameter queue exists per asoc which holds the pending address 57 * operations. Lists are updated upon receipt of ASCONF-ACK. 58 * 59 * A restricted_addrs list exists per assoc to hold local addresses that are 60 * not (yet) usable by the assoc as a source address. These addresses are 61 * either pending an ASCONF operation (and exist on the ASCONF parameter 62 * queue), or they are permanently restricted (the peer has returned an 63 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 64 * 65 * Deleted addresses are always immediately removed from the lists as they will 66 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 67 * only if allowed. 68 */ 69 70 /* 71 * ASCONF parameter processing. 72 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 73 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 74 * FIX: allocating this many mbufs on the fly is pretty inefficient... 75 */ 76 static struct mbuf * 77 sctp_asconf_success_response(uint32_t id) 78 { 79 struct mbuf *m_reply = NULL; 80 struct sctp_asconf_paramhdr *aph; 81 82 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 83 0, M_NOWAIT, 1, MT_DATA); 84 if (m_reply == NULL) { 85 SCTPDBG(SCTP_DEBUG_ASCONF1, 86 "asconf_success_response: couldn't get mbuf!\n"); 87 return (NULL); 88 } 89 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 90 aph->correlation_id = id; 91 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 92 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 93 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 94 aph->ph.param_length = htons(aph->ph.param_length); 95 96 return (m_reply); 97 } 98 99 static struct mbuf * 100 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv, 101 uint16_t tlv_length) 102 { 103 struct mbuf *m_reply = NULL; 104 struct sctp_asconf_paramhdr *aph; 105 struct sctp_error_cause *error; 106 uint8_t *tlv; 107 108 m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) + 109 tlv_length + 110 sizeof(struct sctp_error_cause)), 111 0, M_NOWAIT, 1, MT_DATA); 112 if (m_reply == NULL) { 113 SCTPDBG(SCTP_DEBUG_ASCONF1, 114 "asconf_error_response: couldn't get mbuf!\n"); 115 return (NULL); 116 } 117 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 118 error = (struct sctp_error_cause *)(aph + 1); 119 120 aph->correlation_id = id; 121 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 122 error->code = htons(cause); 123 error->length = tlv_length + sizeof(struct sctp_error_cause); 124 aph->ph.param_length = error->length + 125 sizeof(struct sctp_asconf_paramhdr); 126 127 if (aph->ph.param_length > MLEN) { 128 SCTPDBG(SCTP_DEBUG_ASCONF1, 129 "asconf_error_response: tlv_length (%xh) too big\n", 130 tlv_length); 131 sctp_m_freem(m_reply); /* discard */ 132 return (NULL); 133 } 134 if (error_tlv != NULL) { 135 tlv = (uint8_t *) (error + 1); 136 memcpy(tlv, error_tlv, tlv_length); 137 } 138 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 139 error->length = htons(error->length); 140 aph->ph.param_length = htons(aph->ph.param_length); 141 142 return (m_reply); 143 } 144 145 static struct mbuf * 146 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, 147 struct sctp_tcb *stcb, int send_hb, int response_required) 148 { 149 struct sctp_nets *net; 150 struct mbuf *m_reply = NULL; 151 struct sockaddr_storage sa_store; 152 struct sctp_paramhdr *ph; 153 uint16_t param_type, aparam_length; 154 155 #if defined(INET) || defined(INET6) 156 uint16_t param_length; 157 158 #endif 159 struct sockaddr *sa; 160 int zero_address = 0; 161 int bad_address = 0; 162 163 #ifdef INET 164 struct sockaddr_in *sin; 165 struct sctp_ipv4addr_param *v4addr; 166 167 #endif 168 #ifdef INET6 169 struct sockaddr_in6 *sin6; 170 struct sctp_ipv6addr_param *v6addr; 171 172 #endif 173 174 aparam_length = ntohs(aph->ph.param_length); 175 ph = (struct sctp_paramhdr *)(aph + 1); 176 param_type = ntohs(ph->param_type); 177 #if defined(INET) || defined(INET6) 178 param_length = ntohs(ph->param_length); 179 #endif 180 sa = (struct sockaddr *)&sa_store; 181 switch (param_type) { 182 #ifdef INET 183 case SCTP_IPV4_ADDRESS: 184 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 185 /* invalid param size */ 186 return (NULL); 187 } 188 v4addr = (struct sctp_ipv4addr_param *)ph; 189 sin = (struct sockaddr_in *)&sa_store; 190 bzero(sin, sizeof(*sin)); 191 sin->sin_family = AF_INET; 192 sin->sin_len = sizeof(struct sockaddr_in); 193 sin->sin_port = stcb->rport; 194 sin->sin_addr.s_addr = v4addr->addr; 195 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 196 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 197 bad_address = 1; 198 } 199 if (sin->sin_addr.s_addr == INADDR_ANY) 200 zero_address = 1; 201 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 202 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 203 break; 204 #endif 205 #ifdef INET6 206 case SCTP_IPV6_ADDRESS: 207 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 208 /* invalid param size */ 209 return (NULL); 210 } 211 v6addr = (struct sctp_ipv6addr_param *)ph; 212 sin6 = (struct sockaddr_in6 *)&sa_store; 213 bzero(sin6, sizeof(*sin6)); 214 sin6->sin6_family = AF_INET6; 215 sin6->sin6_len = sizeof(struct sockaddr_in6); 216 sin6->sin6_port = stcb->rport; 217 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 218 sizeof(struct in6_addr)); 219 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 220 bad_address = 1; 221 } 222 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 223 zero_address = 1; 224 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 225 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 226 break; 227 #endif 228 default: 229 m_reply = sctp_asconf_error_response(aph->correlation_id, 230 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 231 aparam_length); 232 return (m_reply); 233 } /* end switch */ 234 235 /* if 0.0.0.0/::0, add the source address instead */ 236 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 237 sa = src; 238 SCTPDBG(SCTP_DEBUG_ASCONF1, 239 "process_asconf_add_ip: using source addr "); 240 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 241 } 242 /* add the address */ 243 if (bad_address) { 244 m_reply = sctp_asconf_error_response(aph->correlation_id, 245 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 246 aparam_length); 247 } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE, 248 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 249 SCTPDBG(SCTP_DEBUG_ASCONF1, 250 "process_asconf_add_ip: error adding address\n"); 251 m_reply = sctp_asconf_error_response(aph->correlation_id, 252 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph, 253 aparam_length); 254 } else { 255 /* notify upper layer */ 256 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 257 if (response_required) { 258 m_reply = 259 sctp_asconf_success_response(aph->correlation_id); 260 } 261 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 262 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 263 stcb, net); 264 if (send_hb) { 265 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 266 } 267 } 268 return (m_reply); 269 } 270 271 static int 272 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 273 { 274 struct sctp_nets *src_net, *net; 275 276 /* make sure the source address exists as a destination net */ 277 src_net = sctp_findnet(stcb, src); 278 if (src_net == NULL) { 279 /* not found */ 280 return (-1); 281 } 282 /* delete all destination addresses except the source */ 283 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 284 if (net != src_net) { 285 /* delete this address */ 286 sctp_remove_net(stcb, net); 287 SCTPDBG(SCTP_DEBUG_ASCONF1, 288 "asconf_del_remote_addrs_except: deleting "); 289 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 290 (struct sockaddr *)&net->ro._l_addr); 291 /* notify upper layer */ 292 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 293 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 294 } 295 } 296 return (0); 297 } 298 299 static struct mbuf * 300 sctp_process_asconf_delete_ip(struct sockaddr *src, 301 struct sctp_asconf_paramhdr *aph, 302 struct sctp_tcb *stcb, int response_required) 303 { 304 struct mbuf *m_reply = NULL; 305 struct sockaddr_storage sa_store; 306 struct sctp_paramhdr *ph; 307 uint16_t param_type, aparam_length; 308 309 #if defined(INET) || defined(INET6) 310 uint16_t param_length; 311 312 #endif 313 struct sockaddr *sa; 314 int zero_address = 0; 315 int result; 316 317 #ifdef INET 318 struct sockaddr_in *sin; 319 struct sctp_ipv4addr_param *v4addr; 320 321 #endif 322 #ifdef INET6 323 struct sockaddr_in6 *sin6; 324 struct sctp_ipv6addr_param *v6addr; 325 326 #endif 327 328 aparam_length = ntohs(aph->ph.param_length); 329 ph = (struct sctp_paramhdr *)(aph + 1); 330 param_type = ntohs(ph->param_type); 331 #if defined(INET) || defined(INET6) 332 param_length = ntohs(ph->param_length); 333 #endif 334 sa = (struct sockaddr *)&sa_store; 335 switch (param_type) { 336 #ifdef INET 337 case SCTP_IPV4_ADDRESS: 338 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 339 /* invalid param size */ 340 return (NULL); 341 } 342 v4addr = (struct sctp_ipv4addr_param *)ph; 343 sin = (struct sockaddr_in *)&sa_store; 344 bzero(sin, sizeof(*sin)); 345 sin->sin_family = AF_INET; 346 sin->sin_len = sizeof(struct sockaddr_in); 347 sin->sin_port = stcb->rport; 348 sin->sin_addr.s_addr = v4addr->addr; 349 if (sin->sin_addr.s_addr == INADDR_ANY) 350 zero_address = 1; 351 SCTPDBG(SCTP_DEBUG_ASCONF1, 352 "process_asconf_delete_ip: deleting "); 353 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 354 break; 355 #endif 356 #ifdef INET6 357 case SCTP_IPV6_ADDRESS: 358 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 359 /* invalid param size */ 360 return (NULL); 361 } 362 v6addr = (struct sctp_ipv6addr_param *)ph; 363 sin6 = (struct sockaddr_in6 *)&sa_store; 364 bzero(sin6, sizeof(*sin6)); 365 sin6->sin6_family = AF_INET6; 366 sin6->sin6_len = sizeof(struct sockaddr_in6); 367 sin6->sin6_port = stcb->rport; 368 memcpy(&sin6->sin6_addr, v6addr->addr, 369 sizeof(struct in6_addr)); 370 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 371 zero_address = 1; 372 SCTPDBG(SCTP_DEBUG_ASCONF1, 373 "process_asconf_delete_ip: deleting "); 374 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 375 break; 376 #endif 377 default: 378 m_reply = sctp_asconf_error_response(aph->correlation_id, 379 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 380 aparam_length); 381 return (m_reply); 382 } 383 384 /* make sure the source address is not being deleted */ 385 if (sctp_cmpaddr(sa, src)) { 386 /* trying to delete the source address! */ 387 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 388 m_reply = sctp_asconf_error_response(aph->correlation_id, 389 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, 390 aparam_length); 391 return (m_reply); 392 } 393 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 394 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 395 result = sctp_asconf_del_remote_addrs_except(stcb, src); 396 397 if (result) { 398 /* src address did not exist? */ 399 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 400 /* what error to reply with?? */ 401 m_reply = 402 sctp_asconf_error_response(aph->correlation_id, 403 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, 404 aparam_length); 405 } else if (response_required) { 406 m_reply = 407 sctp_asconf_success_response(aph->correlation_id); 408 } 409 return (m_reply); 410 } 411 /* delete the address */ 412 result = sctp_del_remote_addr(stcb, sa); 413 /* 414 * note if result == -2, the address doesn't exist in the asoc but 415 * since it's being deleted anyways, we just ack the delete -- but 416 * this probably means something has already gone awry 417 */ 418 if (result == -1) { 419 /* only one address in the asoc */ 420 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 421 m_reply = sctp_asconf_error_response(aph->correlation_id, 422 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, 423 aparam_length); 424 } else { 425 if (response_required) { 426 m_reply = sctp_asconf_success_response(aph->correlation_id); 427 } 428 /* notify upper layer */ 429 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 430 } 431 return (m_reply); 432 } 433 434 static struct mbuf * 435 sctp_process_asconf_set_primary(struct sockaddr *src, 436 struct sctp_asconf_paramhdr *aph, 437 struct sctp_tcb *stcb, int response_required) 438 { 439 struct mbuf *m_reply = NULL; 440 struct sockaddr_storage sa_store; 441 struct sctp_paramhdr *ph; 442 uint16_t param_type, aparam_length; 443 444 #if defined(INET) || defined(INET6) 445 uint16_t param_length; 446 447 #endif 448 struct sockaddr *sa; 449 int zero_address = 0; 450 451 #ifdef INET 452 struct sockaddr_in *sin; 453 struct sctp_ipv4addr_param *v4addr; 454 455 #endif 456 #ifdef INET6 457 struct sockaddr_in6 *sin6; 458 struct sctp_ipv6addr_param *v6addr; 459 460 #endif 461 462 aparam_length = ntohs(aph->ph.param_length); 463 ph = (struct sctp_paramhdr *)(aph + 1); 464 param_type = ntohs(ph->param_type); 465 #if defined(INET) || defined(INET6) 466 param_length = ntohs(ph->param_length); 467 #endif 468 sa = (struct sockaddr *)&sa_store; 469 switch (param_type) { 470 #ifdef INET 471 case SCTP_IPV4_ADDRESS: 472 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 473 /* invalid param size */ 474 return (NULL); 475 } 476 v4addr = (struct sctp_ipv4addr_param *)ph; 477 sin = (struct sockaddr_in *)&sa_store; 478 bzero(sin, sizeof(*sin)); 479 sin->sin_family = AF_INET; 480 sin->sin_len = sizeof(struct sockaddr_in); 481 sin->sin_addr.s_addr = v4addr->addr; 482 if (sin->sin_addr.s_addr == INADDR_ANY) 483 zero_address = 1; 484 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 485 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 486 break; 487 #endif 488 #ifdef INET6 489 case SCTP_IPV6_ADDRESS: 490 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 491 /* invalid param size */ 492 return (NULL); 493 } 494 v6addr = (struct sctp_ipv6addr_param *)ph; 495 sin6 = (struct sockaddr_in6 *)&sa_store; 496 bzero(sin6, sizeof(*sin6)); 497 sin6->sin6_family = AF_INET6; 498 sin6->sin6_len = sizeof(struct sockaddr_in6); 499 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 500 sizeof(struct in6_addr)); 501 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 502 zero_address = 1; 503 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 504 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 505 break; 506 #endif 507 default: 508 m_reply = sctp_asconf_error_response(aph->correlation_id, 509 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 510 aparam_length); 511 return (m_reply); 512 } 513 514 /* if 0.0.0.0/::0, use the source address instead */ 515 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 516 sa = src; 517 SCTPDBG(SCTP_DEBUG_ASCONF1, 518 "process_asconf_set_primary: using source addr "); 519 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 520 } 521 /* set the primary address */ 522 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 523 SCTPDBG(SCTP_DEBUG_ASCONF1, 524 "process_asconf_set_primary: primary address set\n"); 525 /* notify upper layer */ 526 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 527 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 528 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 529 (stcb->asoc.alternate)) { 530 sctp_free_remote_addr(stcb->asoc.alternate); 531 stcb->asoc.alternate = NULL; 532 } 533 if (response_required) { 534 m_reply = sctp_asconf_success_response(aph->correlation_id); 535 } 536 /* 537 * Mobility adaptation. Ideally, when the reception of SET 538 * PRIMARY with DELETE IP ADDRESS of the previous primary 539 * destination, unacknowledged DATA are retransmitted 540 * immediately to the new primary destination for seamless 541 * handover. If the destination is UNCONFIRMED and marked to 542 * REQ_PRIM, The retransmission occur when reception of the 543 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 544 * sctp_input.c) Also, when change of the primary 545 * destination, it is better that all subsequent new DATA 546 * containing already queued DATA are transmitted to the new 547 * primary destination. (by micchie) 548 */ 549 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 550 SCTP_MOBILITY_BASE) || 551 sctp_is_mobility_feature_on(stcb->sctp_ep, 552 SCTP_MOBILITY_FASTHANDOFF)) && 553 sctp_is_mobility_feature_on(stcb->sctp_ep, 554 SCTP_MOBILITY_PRIM_DELETED) && 555 (stcb->asoc.primary_destination->dest_state & 556 SCTP_ADDR_UNCONFIRMED) == 0) { 557 558 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7); 559 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 560 SCTP_MOBILITY_FASTHANDOFF)) { 561 sctp_assoc_immediate_retrans(stcb, 562 stcb->asoc.primary_destination); 563 } 564 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 565 SCTP_MOBILITY_BASE)) { 566 sctp_move_chunks_from_net(stcb, 567 stcb->asoc.deleted_primary); 568 } 569 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 570 stcb->asoc.deleted_primary); 571 } 572 } else { 573 /* couldn't set the requested primary address! */ 574 SCTPDBG(SCTP_DEBUG_ASCONF1, 575 "process_asconf_set_primary: set primary failed!\n"); 576 /* must have been an invalid address, so report */ 577 m_reply = sctp_asconf_error_response(aph->correlation_id, 578 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 579 aparam_length); 580 } 581 582 return (m_reply); 583 } 584 585 /* 586 * handles an ASCONF chunk. 587 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 588 */ 589 void 590 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 591 struct sockaddr *src, 592 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 593 int first) 594 { 595 struct sctp_association *asoc; 596 uint32_t serial_num; 597 struct mbuf *n, *m_ack, *m_result, *m_tail; 598 struct sctp_asconf_ack_chunk *ack_cp; 599 struct sctp_asconf_paramhdr *aph, *ack_aph; 600 struct sctp_ipv6addr_param *p_addr; 601 unsigned int asconf_limit, cnt; 602 int error = 0; /* did an error occur? */ 603 604 /* asconf param buffer */ 605 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 606 struct sctp_asconf_ack *ack, *ack_next; 607 608 /* verify minimum length */ 609 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 610 SCTPDBG(SCTP_DEBUG_ASCONF1, 611 "handle_asconf: chunk too small = %xh\n", 612 ntohs(cp->ch.chunk_length)); 613 return; 614 } 615 asoc = &stcb->asoc; 616 serial_num = ntohl(cp->serial_number); 617 618 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 619 /* got a duplicate ASCONF */ 620 SCTPDBG(SCTP_DEBUG_ASCONF1, 621 "handle_asconf: got duplicate serial number = %xh\n", 622 serial_num); 623 return; 624 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 625 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 626 serial_num, asoc->asconf_seq_in + 1); 627 return; 628 } 629 /* it's the expected "next" sequence number, so process it */ 630 asoc->asconf_seq_in = serial_num; /* update sequence */ 631 /* get length of all the param's in the ASCONF */ 632 asconf_limit = offset + ntohs(cp->ch.chunk_length); 633 SCTPDBG(SCTP_DEBUG_ASCONF1, 634 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 635 asconf_limit, serial_num); 636 637 if (first) { 638 /* delete old cache */ 639 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 640 641 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 642 if (ack->serial_number == serial_num) 643 break; 644 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 645 ack->serial_number, serial_num); 646 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 647 if (ack->data != NULL) { 648 sctp_m_freem(ack->data); 649 } 650 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 651 } 652 } 653 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 654 M_NOWAIT, 1, MT_DATA); 655 if (m_ack == NULL) { 656 SCTPDBG(SCTP_DEBUG_ASCONF1, 657 "handle_asconf: couldn't get mbuf!\n"); 658 return; 659 } 660 m_tail = m_ack; /* current reply chain's tail */ 661 662 /* fill in ASCONF-ACK header */ 663 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 664 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 665 ack_cp->ch.chunk_flags = 0; 666 ack_cp->serial_number = htonl(serial_num); 667 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 668 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 669 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 670 671 /* skip the lookup address parameter */ 672 offset += sizeof(struct sctp_asconf_chunk); 673 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 674 if (p_addr == NULL) { 675 SCTPDBG(SCTP_DEBUG_ASCONF1, 676 "handle_asconf: couldn't get lookup addr!\n"); 677 /* respond with a missing/invalid mandatory parameter error */ 678 return; 679 } 680 /* param_length is already validated in process_control... */ 681 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 682 683 /* get pointer to first asconf param in ASCONF-ACK */ 684 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk)); 685 if (ack_aph == NULL) { 686 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n"); 687 return; 688 } 689 /* get pointer to first asconf param in ASCONF */ 690 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 691 if (aph == NULL) { 692 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 693 goto send_reply; 694 } 695 /* process through all parameters */ 696 cnt = 0; 697 while (aph != NULL) { 698 unsigned int param_length, param_type; 699 700 param_type = ntohs(aph->ph.param_type); 701 param_length = ntohs(aph->ph.param_length); 702 if (offset + param_length > asconf_limit) { 703 /* parameter goes beyond end of chunk! */ 704 sctp_m_freem(m_ack); 705 return; 706 } 707 m_result = NULL; 708 709 if (param_length > sizeof(aparam_buf)) { 710 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 711 sctp_m_freem(m_ack); 712 return; 713 } 714 if (param_length <= sizeof(struct sctp_paramhdr)) { 715 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 716 sctp_m_freem(m_ack); 717 } 718 /* get the entire parameter */ 719 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 720 if (aph == NULL) { 721 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 722 sctp_m_freem(m_ack); 723 return; 724 } 725 switch (param_type) { 726 case SCTP_ADD_IP_ADDRESS: 727 asoc->peer_supports_asconf = 1; 728 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 729 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 730 cnt++; 731 break; 732 case SCTP_DEL_IP_ADDRESS: 733 asoc->peer_supports_asconf = 1; 734 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 735 error); 736 break; 737 case SCTP_ERROR_CAUSE_IND: 738 /* not valid in an ASCONF chunk */ 739 break; 740 case SCTP_SET_PRIM_ADDR: 741 asoc->peer_supports_asconf = 1; 742 m_result = sctp_process_asconf_set_primary(src, aph, 743 stcb, error); 744 break; 745 case SCTP_NAT_VTAGS: 746 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 747 break; 748 case SCTP_SUCCESS_REPORT: 749 /* not valid in an ASCONF chunk */ 750 break; 751 case SCTP_ULP_ADAPTATION: 752 /* FIX */ 753 break; 754 default: 755 if ((param_type & 0x8000) == 0) { 756 /* Been told to STOP at this param */ 757 asconf_limit = offset; 758 /* 759 * FIX FIX - We need to call 760 * sctp_arethere_unrecognized_parameters() 761 * to get a operr and send it for any 762 * param's with the 0x4000 bit set OR do it 763 * here ourselves... note we still must STOP 764 * if the 0x8000 bit is clear. 765 */ 766 } 767 /* unknown/invalid param type */ 768 break; 769 } /* switch */ 770 771 /* add any (error) result to the reply mbuf chain */ 772 if (m_result != NULL) { 773 SCTP_BUF_NEXT(m_tail) = m_result; 774 m_tail = m_result; 775 /* update lengths, make sure it's aligned too */ 776 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 777 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 778 /* set flag to force success reports */ 779 error = 1; 780 } 781 offset += SCTP_SIZE32(param_length); 782 /* update remaining ASCONF message length to process */ 783 if (offset >= asconf_limit) { 784 /* no more data in the mbuf chain */ 785 break; 786 } 787 /* get pointer to next asconf param */ 788 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 789 sizeof(struct sctp_asconf_paramhdr), 790 (uint8_t *) & aparam_buf); 791 if (aph == NULL) { 792 /* can't get an asconf paramhdr */ 793 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 794 /* FIX ME - add error here... */ 795 } 796 } 797 798 send_reply: 799 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 800 /* save the ASCONF-ACK reply */ 801 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 802 struct sctp_asconf_ack); 803 if (ack == NULL) { 804 sctp_m_freem(m_ack); 805 return; 806 } 807 ack->serial_number = serial_num; 808 ack->last_sent_to = NULL; 809 ack->data = m_ack; 810 ack->len = 0; 811 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 812 ack->len += SCTP_BUF_LEN(n); 813 } 814 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 815 816 /* see if last_control_chunk_from is set properly (use IP src addr) */ 817 if (stcb->asoc.last_control_chunk_from == NULL) { 818 /* 819 * this could happen if the source address was just newly 820 * added 821 */ 822 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 823 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 824 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 825 /* look up the from address */ 826 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 827 #ifdef SCTP_DEBUG 828 if (stcb->asoc.last_control_chunk_from == NULL) { 829 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 830 } 831 #endif 832 } 833 } 834 835 /* 836 * does the address match? returns 0 if not, 1 if so 837 */ 838 static uint32_t 839 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 840 { 841 switch (sa->sa_family) { 842 #ifdef INET6 843 case AF_INET6: 844 { 845 /* XXX scopeid */ 846 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 847 848 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 849 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 850 sizeof(struct in6_addr)) == 0)) { 851 return (1); 852 } 853 break; 854 } 855 #endif 856 #ifdef INET 857 case AF_INET: 858 { 859 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 860 861 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 862 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 863 sizeof(struct in_addr)) == 0)) { 864 return (1); 865 } 866 break; 867 } 868 #endif 869 default: 870 break; 871 } 872 return (0); 873 } 874 875 /* 876 * does the address match? returns 0 if not, 1 if so 877 */ 878 static uint32_t 879 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 880 { 881 #if defined(INET) || defined(INET6) 882 uint16_t param_type, param_length; 883 884 param_type = ntohs(ph->param_type); 885 param_length = ntohs(ph->param_length); 886 #endif 887 switch (sa->sa_family) { 888 #ifdef INET6 889 case AF_INET6: 890 { 891 /* XXX scopeid */ 892 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 893 struct sctp_ipv6addr_param *v6addr; 894 895 v6addr = (struct sctp_ipv6addr_param *)ph; 896 if ((param_type == SCTP_IPV6_ADDRESS) && 897 (param_length == sizeof(struct sctp_ipv6addr_param)) && 898 (memcmp(&v6addr->addr, &sin6->sin6_addr, 899 sizeof(struct in6_addr)) == 0)) { 900 return (1); 901 } 902 break; 903 } 904 #endif 905 #ifdef INET 906 case AF_INET: 907 { 908 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 909 struct sctp_ipv4addr_param *v4addr; 910 911 v4addr = (struct sctp_ipv4addr_param *)ph; 912 if ((param_type == SCTP_IPV4_ADDRESS) && 913 (param_length == sizeof(struct sctp_ipv4addr_param)) && 914 (memcmp(&v4addr->addr, &sin->sin_addr, 915 sizeof(struct in_addr)) == 0)) { 916 return (1); 917 } 918 break; 919 } 920 #endif 921 default: 922 break; 923 } 924 return (0); 925 } 926 927 /* 928 * Cleanup for non-responded/OP ERR'd ASCONF 929 */ 930 void 931 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 932 { 933 /* mark peer as ASCONF incapable */ 934 stcb->asoc.peer_supports_asconf = 0; 935 /* 936 * clear out any existing asconfs going out 937 */ 938 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 939 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 940 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 941 /* remove the old ASCONF on our outbound queue */ 942 sctp_toss_old_asconf(stcb); 943 } 944 945 /* 946 * cleanup any cached source addresses that may be topologically 947 * incorrect after a new address has been added to this interface. 948 */ 949 static void 950 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 951 { 952 struct sctp_nets *net; 953 954 /* 955 * Ideally, we want to only clear cached routes and source addresses 956 * that are topologically incorrect. But since there is no easy way 957 * to know whether the newly added address on the ifn would cause a 958 * routing change (i.e. a new egress interface would be chosen) 959 * without doing a new routing lookup and source address selection, 960 * we will (for now) just flush any cached route using a different 961 * ifn (and cached source addrs) and let output re-choose them 962 * during the next send on that net. 963 */ 964 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 965 /* 966 * clear any cached route (and cached source address) if the 967 * route's interface is NOT the same as the address change. 968 * If it's the same interface, just clear the cached source 969 * address. 970 */ 971 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 972 ((ifn == NULL) || 973 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 974 /* clear any cached route */ 975 RTFREE(net->ro.ro_rt); 976 net->ro.ro_rt = NULL; 977 } 978 /* clear any cached source address */ 979 if (net->src_addr_selected) { 980 sctp_free_ifa(net->ro._s_addr); 981 net->ro._s_addr = NULL; 982 net->src_addr_selected = 0; 983 } 984 } 985 } 986 987 988 void 989 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 990 { 991 int error; 992 993 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 994 return; 995 } 996 if (stcb->asoc.deleted_primary == NULL) { 997 return; 998 } 999 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 1000 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 1001 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1002 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 1003 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 1004 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 1005 stcb->asoc.deleted_primary, 1006 SCTP_FROM_SCTP_TIMER + SCTP_LOC_8); 1007 stcb->asoc.num_send_timers_up--; 1008 if (stcb->asoc.num_send_timers_up < 0) { 1009 stcb->asoc.num_send_timers_up = 0; 1010 } 1011 SCTP_TCB_LOCK_ASSERT(stcb); 1012 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1013 stcb->asoc.deleted_primary); 1014 if (error) { 1015 SCTP_INP_DECR_REF(stcb->sctp_ep); 1016 return; 1017 } 1018 SCTP_TCB_LOCK_ASSERT(stcb); 1019 #ifdef SCTP_AUDITING_ENABLED 1020 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1021 #endif 1022 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1023 if ((stcb->asoc.num_send_timers_up == 0) && 1024 (stcb->asoc.sent_queue_cnt > 0)) { 1025 struct sctp_tmit_chunk *chk; 1026 1027 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1028 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1029 stcb, chk->whoTo); 1030 } 1031 } 1032 return; 1033 } 1034 1035 static int 1036 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1037 1038 void 1039 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1040 { 1041 struct sctp_tmit_chunk *chk; 1042 1043 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1044 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1045 SCTP_FROM_SCTP_TIMER + SCTP_LOC_5); 1046 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1047 net->error_count = 0; 1048 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1049 if (chk->whoTo == net) { 1050 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1051 chk->sent = SCTP_DATAGRAM_RESEND; 1052 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1053 sctp_flight_size_decrease(chk); 1054 sctp_total_flight_decrease(stcb, chk); 1055 net->marked_retrans++; 1056 stcb->asoc.marked_retrans++; 1057 } 1058 } 1059 } 1060 if (net->marked_retrans) { 1061 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1062 } 1063 } 1064 1065 static void 1066 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1067 { 1068 struct sctp_nets *net; 1069 int addrnum, changed; 1070 1071 /* 1072 * If number of local valid addresses is 1, the valid address is 1073 * probably newly added address. Several valid addresses in this 1074 * association. A source address may not be changed. Additionally, 1075 * they can be configured on a same interface as "alias" addresses. 1076 * (by micchie) 1077 */ 1078 addrnum = sctp_local_addr_count(stcb); 1079 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1080 addrnum); 1081 if (addrnum == 1) { 1082 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1083 /* clear any cached route and source address */ 1084 if (net->ro.ro_rt) { 1085 RTFREE(net->ro.ro_rt); 1086 net->ro.ro_rt = NULL; 1087 } 1088 if (net->src_addr_selected) { 1089 sctp_free_ifa(net->ro._s_addr); 1090 net->ro._s_addr = NULL; 1091 net->src_addr_selected = 0; 1092 } 1093 /* Retransmit unacknowledged DATA chunks immediately */ 1094 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1095 SCTP_MOBILITY_FASTHANDOFF)) { 1096 sctp_net_immediate_retrans(stcb, net); 1097 } 1098 /* also, SET PRIMARY is maybe already sent */ 1099 } 1100 return; 1101 } 1102 /* Multiple local addresses exsist in the association. */ 1103 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1104 /* clear any cached route and source address */ 1105 if (net->ro.ro_rt) { 1106 RTFREE(net->ro.ro_rt); 1107 net->ro.ro_rt = NULL; 1108 } 1109 if (net->src_addr_selected) { 1110 sctp_free_ifa(net->ro._s_addr); 1111 net->ro._s_addr = NULL; 1112 net->src_addr_selected = 0; 1113 } 1114 /* 1115 * Check if the nexthop is corresponding to the new address. 1116 * If the new address is corresponding to the current 1117 * nexthop, the path will be changed. If the new address is 1118 * NOT corresponding to the current nexthop, the path will 1119 * not be changed. 1120 */ 1121 SCTP_RTALLOC((sctp_route_t *) & net->ro, 1122 stcb->sctp_ep->def_vrf_id); 1123 if (net->ro.ro_rt == NULL) 1124 continue; 1125 1126 changed = 0; 1127 switch (net->ro._l_addr.sa.sa_family) { 1128 #ifdef INET 1129 case AF_INET: 1130 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) { 1131 changed = 1; 1132 } 1133 break; 1134 #endif 1135 #ifdef INET6 1136 case AF_INET6: 1137 if (sctp_v6src_match_nexthop( 1138 &newifa->address.sin6, (sctp_route_t *) & net->ro)) { 1139 changed = 1; 1140 } 1141 break; 1142 #endif 1143 default: 1144 break; 1145 } 1146 /* 1147 * if the newly added address does not relate routing 1148 * information, we skip. 1149 */ 1150 if (changed == 0) 1151 continue; 1152 /* Retransmit unacknowledged DATA chunks immediately */ 1153 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1154 SCTP_MOBILITY_FASTHANDOFF)) { 1155 sctp_net_immediate_retrans(stcb, net); 1156 } 1157 /* Send SET PRIMARY for this new address */ 1158 if (net == stcb->asoc.primary_destination) { 1159 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1160 SCTP_SET_PRIM_ADDR); 1161 } 1162 } 1163 } 1164 1165 /* 1166 * process an ADD/DELETE IP ack from peer. 1167 * addr: corresponding sctp_ifa to the address being added/deleted. 1168 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1169 * flag: 1=success, 0=failure. 1170 */ 1171 static void 1172 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1173 { 1174 /* 1175 * do the necessary asoc list work- if we get a failure indication, 1176 * leave the address on the assoc's restricted list. If we get a 1177 * success indication, remove the address from the restricted list. 1178 */ 1179 /* 1180 * Note: this will only occur for ADD_IP_ADDRESS, since 1181 * DEL_IP_ADDRESS is never actually added to the list... 1182 */ 1183 if (flag) { 1184 /* success case, so remove from the restricted list */ 1185 sctp_del_local_addr_restricted(stcb, addr); 1186 1187 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1188 SCTP_MOBILITY_BASE) || 1189 sctp_is_mobility_feature_on(stcb->sctp_ep, 1190 SCTP_MOBILITY_FASTHANDOFF)) { 1191 sctp_path_check_and_react(stcb, addr); 1192 return; 1193 } 1194 /* clear any cached/topologically incorrect source addresses */ 1195 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1196 } 1197 /* else, leave it on the list */ 1198 } 1199 1200 /* 1201 * add an asconf add/delete/set primary IP address parameter to the queue. 1202 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1203 * returns 0 if queued, -1 if not queued/removed. 1204 * NOTE: if adding, but a delete for the same address is already scheduled 1205 * (and not yet sent out), simply remove it from queue. Same for deleting 1206 * an address already scheduled for add. If a duplicate operation is found, 1207 * ignore the new one. 1208 */ 1209 static int 1210 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1211 uint16_t type) 1212 { 1213 struct sctp_asconf_addr *aa, *aa_next; 1214 1215 /* make sure the request isn't already in the queue */ 1216 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1217 /* address match? */ 1218 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1219 continue; 1220 /* 1221 * is the request already in queue but not sent? pass the 1222 * request already sent in order to resolve the following 1223 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1224 * can't remove the ADD request already sent 3. arrival of 1225 * ADD 1226 */ 1227 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1228 return (-1); 1229 } 1230 /* is the negative request already in queue, and not sent */ 1231 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1232 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1233 /* add requested, delete already queued */ 1234 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1235 /* remove the ifa from the restricted list */ 1236 sctp_del_local_addr_restricted(stcb, ifa); 1237 /* free the asconf param */ 1238 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1239 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1240 return (-1); 1241 } 1242 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1243 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1244 /* delete requested, add already queued */ 1245 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1246 /* remove the aa->ifa from the restricted list */ 1247 sctp_del_local_addr_restricted(stcb, aa->ifa); 1248 /* free the asconf param */ 1249 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1250 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1251 return (-1); 1252 } 1253 } /* for each aa */ 1254 1255 /* adding new request to the queue */ 1256 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1257 SCTP_M_ASC_ADDR); 1258 if (aa == NULL) { 1259 /* didn't get memory */ 1260 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1261 return (-1); 1262 } 1263 aa->special_del = 0; 1264 /* fill in asconf address parameter fields */ 1265 /* top level elements are "networked" during send */ 1266 aa->ap.aph.ph.param_type = type; 1267 aa->ifa = ifa; 1268 atomic_add_int(&ifa->refcount, 1); 1269 /* correlation_id filled in during send routine later... */ 1270 switch (ifa->address.sa.sa_family) { 1271 #ifdef INET6 1272 case AF_INET6: 1273 { 1274 struct sockaddr_in6 *sin6; 1275 1276 sin6 = (struct sockaddr_in6 *)&ifa->address.sa; 1277 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1278 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1279 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1280 sizeof(struct sctp_ipv6addr_param); 1281 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1282 sizeof(struct in6_addr)); 1283 break; 1284 } 1285 #endif 1286 #ifdef INET 1287 case AF_INET: 1288 { 1289 struct sockaddr_in *sin; 1290 1291 sin = (struct sockaddr_in *)&ifa->address.sa; 1292 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1293 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1294 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1295 sizeof(struct sctp_ipv4addr_param); 1296 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1297 sizeof(struct in_addr)); 1298 break; 1299 } 1300 #endif 1301 default: 1302 /* invalid family! */ 1303 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1304 sctp_free_ifa(ifa); 1305 return (-1); 1306 } 1307 aa->sent = 0; /* clear sent flag */ 1308 1309 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1310 #ifdef SCTP_DEBUG 1311 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1312 if (type == SCTP_ADD_IP_ADDRESS) { 1313 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1314 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1315 } else if (type == SCTP_DEL_IP_ADDRESS) { 1316 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1317 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1318 } else { 1319 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1320 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1321 } 1322 } 1323 #endif 1324 1325 return (0); 1326 } 1327 1328 1329 /* 1330 * add an asconf operation for the given ifa and type. 1331 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1332 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1333 * advisable. 1334 */ 1335 static int 1336 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1337 uint16_t type) 1338 { 1339 uint32_t status; 1340 int pending_delete_queued = 0; 1341 1342 /* see if peer supports ASCONF */ 1343 if (stcb->asoc.peer_supports_asconf == 0) { 1344 return (-1); 1345 } 1346 /* 1347 * if this is deleting the last address from the assoc, mark it as 1348 * pending. 1349 */ 1350 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending && 1351 (sctp_local_addr_count(stcb) < 2)) { 1352 /* set the pending delete info only */ 1353 stcb->asoc.asconf_del_pending = 1; 1354 stcb->asoc.asconf_addr_del_pending = ifa; 1355 atomic_add_int(&ifa->refcount, 1); 1356 SCTPDBG(SCTP_DEBUG_ASCONF2, 1357 "asconf_queue_add: mark delete last address pending\n"); 1358 return (-1); 1359 } 1360 /* queue an asconf parameter */ 1361 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1362 1363 /* 1364 * if this is an add, and there is a delete also pending (i.e. the 1365 * last local address is being changed), queue the pending delete 1366 * too. 1367 */ 1368 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1369 /* queue in the pending delete */ 1370 if (sctp_asconf_queue_mgmt(stcb, 1371 stcb->asoc.asconf_addr_del_pending, 1372 SCTP_DEL_IP_ADDRESS) == 0) { 1373 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1374 pending_delete_queued = 1; 1375 /* clear out the pending delete info */ 1376 stcb->asoc.asconf_del_pending = 0; 1377 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1378 stcb->asoc.asconf_addr_del_pending = NULL; 1379 } 1380 } 1381 if (pending_delete_queued) { 1382 struct sctp_nets *net; 1383 1384 /* 1385 * since we know that the only/last address is now being 1386 * changed in this case, reset the cwnd/rto on all nets to 1387 * start as a new address and path. Also clear the error 1388 * counts to give the assoc the best chance to complete the 1389 * address change. 1390 */ 1391 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1392 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1393 net); 1394 net->RTO = 0; 1395 net->error_count = 0; 1396 } 1397 stcb->asoc.overall_error_count = 0; 1398 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1399 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1400 stcb->asoc.overall_error_count, 1401 0, 1402 SCTP_FROM_SCTP_ASCONF, 1403 __LINE__); 1404 } 1405 /* queue in an advisory set primary too */ 1406 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1407 /* let caller know we should send this out immediately */ 1408 status = 1; 1409 } 1410 return (status); 1411 } 1412 1413 /*- 1414 * add an asconf delete IP address parameter to the queue by sockaddr and 1415 * possibly with no sctp_ifa available. This is only called by the routine 1416 * that checks the addresses in an INIT-ACK against the current address list. 1417 * returns 0 if completed, non-zero if not completed. 1418 * NOTE: if an add is already scheduled (and not yet sent out), simply 1419 * remove it from queue. If a duplicate operation is found, ignore the 1420 * new one. 1421 */ 1422 static int 1423 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1424 { 1425 struct sctp_ifa *ifa; 1426 struct sctp_asconf_addr *aa, *aa_next; 1427 uint32_t vrf_id; 1428 1429 if (stcb == NULL) { 1430 return (-1); 1431 } 1432 /* see if peer supports ASCONF */ 1433 if (stcb->asoc.peer_supports_asconf == 0) { 1434 return (-1); 1435 } 1436 /* make sure the request isn't already in the queue */ 1437 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1438 /* address match? */ 1439 if (sctp_asconf_addr_match(aa, sa) == 0) 1440 continue; 1441 /* is the request already in queue (sent or not) */ 1442 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1443 return (-1); 1444 } 1445 /* is the negative request already in queue, and not sent */ 1446 if (aa->sent == 1) 1447 continue; 1448 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1449 /* add already queued, so remove existing entry */ 1450 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1451 sctp_del_local_addr_restricted(stcb, aa->ifa); 1452 /* free the entry */ 1453 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1454 return (-1); 1455 } 1456 } /* for each aa */ 1457 1458 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1459 if (stcb) { 1460 vrf_id = stcb->asoc.vrf_id; 1461 } else { 1462 vrf_id = SCTP_DEFAULT_VRFID; 1463 } 1464 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 1465 1466 /* adding new request to the queue */ 1467 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1468 SCTP_M_ASC_ADDR); 1469 if (aa == NULL) { 1470 /* didn't get memory */ 1471 SCTPDBG(SCTP_DEBUG_ASCONF1, 1472 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1473 return (-1); 1474 } 1475 aa->special_del = 0; 1476 /* fill in asconf address parameter fields */ 1477 /* top level elements are "networked" during send */ 1478 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1479 aa->ifa = ifa; 1480 if (ifa) 1481 atomic_add_int(&ifa->refcount, 1); 1482 /* correlation_id filled in during send routine later... */ 1483 switch (sa->sa_family) { 1484 #ifdef INET6 1485 case AF_INET6: 1486 { 1487 /* IPv6 address */ 1488 struct sockaddr_in6 *sin6; 1489 1490 sin6 = (struct sockaddr_in6 *)sa; 1491 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1492 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1493 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1494 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1495 sizeof(struct in6_addr)); 1496 break; 1497 } 1498 #endif 1499 #ifdef INET 1500 case AF_INET: 1501 { 1502 /* IPv4 address */ 1503 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1504 1505 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1506 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1507 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1508 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1509 sizeof(struct in_addr)); 1510 break; 1511 } 1512 #endif 1513 default: 1514 /* invalid family! */ 1515 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1516 if (ifa) 1517 sctp_free_ifa(ifa); 1518 return (-1); 1519 } 1520 aa->sent = 0; /* clear sent flag */ 1521 1522 /* delete goes to the back of the queue */ 1523 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1524 1525 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1526 return (0); 1527 } 1528 1529 /* 1530 * find a specific asconf param on our "sent" queue 1531 */ 1532 static struct sctp_asconf_addr * 1533 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1534 { 1535 struct sctp_asconf_addr *aa; 1536 1537 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1538 if (aa->ap.aph.correlation_id == correlation_id && 1539 aa->sent == 1) { 1540 /* found it */ 1541 return (aa); 1542 } 1543 } 1544 /* didn't find it */ 1545 return (NULL); 1546 } 1547 1548 /* 1549 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1550 * notifications based on the error response 1551 */ 1552 static void 1553 sctp_asconf_process_error(struct sctp_tcb *stcb, 1554 struct sctp_asconf_paramhdr *aph) 1555 { 1556 struct sctp_error_cause *eh; 1557 struct sctp_paramhdr *ph; 1558 uint16_t param_type; 1559 uint16_t error_code; 1560 1561 eh = (struct sctp_error_cause *)(aph + 1); 1562 ph = (struct sctp_paramhdr *)(eh + 1); 1563 /* validate lengths */ 1564 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1565 htons(aph->ph.param_length)) { 1566 /* invalid error cause length */ 1567 SCTPDBG(SCTP_DEBUG_ASCONF1, 1568 "asconf_process_error: cause element too long\n"); 1569 return; 1570 } 1571 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1572 htons(eh->length)) { 1573 /* invalid included TLV length */ 1574 SCTPDBG(SCTP_DEBUG_ASCONF1, 1575 "asconf_process_error: included TLV too long\n"); 1576 return; 1577 } 1578 /* which error code ? */ 1579 error_code = ntohs(eh->code); 1580 param_type = ntohs(aph->ph.param_type); 1581 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1582 switch (error_code) { 1583 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1584 /* we allow ourselves to "try again" for this error */ 1585 break; 1586 default: 1587 /* peer can't handle it... */ 1588 switch (param_type) { 1589 case SCTP_ADD_IP_ADDRESS: 1590 case SCTP_DEL_IP_ADDRESS: 1591 stcb->asoc.peer_supports_asconf = 0; 1592 break; 1593 case SCTP_SET_PRIM_ADDR: 1594 stcb->asoc.peer_supports_asconf = 0; 1595 break; 1596 default: 1597 break; 1598 } 1599 } 1600 } 1601 1602 /* 1603 * process an asconf queue param. 1604 * aparam: parameter to process, will be removed from the queue. 1605 * flag: 1=success case, 0=failure case 1606 */ 1607 static void 1608 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1609 struct sctp_asconf_addr *aparam, uint32_t flag) 1610 { 1611 uint16_t param_type; 1612 1613 /* process this param */ 1614 param_type = aparam->ap.aph.ph.param_type; 1615 switch (param_type) { 1616 case SCTP_ADD_IP_ADDRESS: 1617 SCTPDBG(SCTP_DEBUG_ASCONF1, 1618 "process_param_ack: added IP address\n"); 1619 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1620 break; 1621 case SCTP_DEL_IP_ADDRESS: 1622 SCTPDBG(SCTP_DEBUG_ASCONF1, 1623 "process_param_ack: deleted IP address\n"); 1624 /* nothing really to do... lists already updated */ 1625 break; 1626 case SCTP_SET_PRIM_ADDR: 1627 SCTPDBG(SCTP_DEBUG_ASCONF1, 1628 "process_param_ack: set primary IP address\n"); 1629 /* nothing to do... peer may start using this addr */ 1630 if (flag == 0) 1631 stcb->asoc.peer_supports_asconf = 0; 1632 break; 1633 default: 1634 /* should NEVER happen */ 1635 break; 1636 } 1637 1638 /* remove the param and free it */ 1639 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1640 if (aparam->ifa) 1641 sctp_free_ifa(aparam->ifa); 1642 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1643 } 1644 1645 /* 1646 * cleanup from a bad asconf ack parameter 1647 */ 1648 static void 1649 sctp_asconf_ack_clear(struct sctp_tcb *stcb) 1650 { 1651 /* assume peer doesn't really know how to do asconfs */ 1652 stcb->asoc.peer_supports_asconf = 0; 1653 /* XXX we could free the pending queue here */ 1654 } 1655 1656 void 1657 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1658 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1659 struct sctp_nets *net, int *abort_no_unlock) 1660 { 1661 struct sctp_association *asoc; 1662 uint32_t serial_num; 1663 uint16_t ack_length; 1664 struct sctp_asconf_paramhdr *aph; 1665 struct sctp_asconf_addr *aa, *aa_next; 1666 uint32_t last_error_id = 0; /* last error correlation id */ 1667 uint32_t id; 1668 struct sctp_asconf_addr *ap; 1669 1670 /* asconf param buffer */ 1671 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1672 1673 /* verify minimum length */ 1674 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1675 SCTPDBG(SCTP_DEBUG_ASCONF1, 1676 "handle_asconf_ack: chunk too small = %xh\n", 1677 ntohs(cp->ch.chunk_length)); 1678 return; 1679 } 1680 asoc = &stcb->asoc; 1681 serial_num = ntohl(cp->serial_number); 1682 1683 /* 1684 * NOTE: we may want to handle this differently- currently, we will 1685 * abort when we get an ack for the expected serial number + 1 (eg. 1686 * we didn't send it), process an ack normally if it is the expected 1687 * serial number, and re-send the previous ack for *ALL* other 1688 * serial numbers 1689 */ 1690 1691 /* 1692 * if the serial number is the next expected, but I didn't send it, 1693 * abort the asoc, since someone probably just hijacked us... 1694 */ 1695 if (serial_num == (asoc->asconf_seq_out + 1)) { 1696 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1697 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED); 1698 *abort_no_unlock = 1; 1699 return; 1700 } 1701 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1702 /* got a duplicate/unexpected ASCONF-ACK */ 1703 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1704 serial_num, asoc->asconf_seq_out_acked + 1); 1705 return; 1706 } 1707 if (serial_num == asoc->asconf_seq_out - 1) { 1708 /* stop our timer */ 1709 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1710 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1711 } 1712 /* process the ASCONF-ACK contents */ 1713 ack_length = ntohs(cp->ch.chunk_length) - 1714 sizeof(struct sctp_asconf_ack_chunk); 1715 offset += sizeof(struct sctp_asconf_ack_chunk); 1716 /* process through all parameters */ 1717 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1718 unsigned int param_length, param_type; 1719 1720 /* get pointer to next asconf parameter */ 1721 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1722 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1723 if (aph == NULL) { 1724 /* can't get an asconf paramhdr */ 1725 sctp_asconf_ack_clear(stcb); 1726 return; 1727 } 1728 param_type = ntohs(aph->ph.param_type); 1729 param_length = ntohs(aph->ph.param_length); 1730 if (param_length > ack_length) { 1731 sctp_asconf_ack_clear(stcb); 1732 return; 1733 } 1734 if (param_length < sizeof(struct sctp_paramhdr)) { 1735 sctp_asconf_ack_clear(stcb); 1736 return; 1737 } 1738 /* get the complete parameter... */ 1739 if (param_length > sizeof(aparam_buf)) { 1740 SCTPDBG(SCTP_DEBUG_ASCONF1, 1741 "param length (%u) larger than buffer size!\n", param_length); 1742 sctp_asconf_ack_clear(stcb); 1743 return; 1744 } 1745 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1746 if (aph == NULL) { 1747 sctp_asconf_ack_clear(stcb); 1748 return; 1749 } 1750 /* correlation_id is transparent to peer, no ntohl needed */ 1751 id = aph->correlation_id; 1752 1753 switch (param_type) { 1754 case SCTP_ERROR_CAUSE_IND: 1755 last_error_id = id; 1756 /* find the corresponding asconf param in our queue */ 1757 ap = sctp_asconf_find_param(stcb, id); 1758 if (ap == NULL) { 1759 /* hmm... can't find this in our queue! */ 1760 break; 1761 } 1762 /* process the parameter, failed flag */ 1763 sctp_asconf_process_param_ack(stcb, ap, 0); 1764 /* process the error response */ 1765 sctp_asconf_process_error(stcb, aph); 1766 break; 1767 case SCTP_SUCCESS_REPORT: 1768 /* find the corresponding asconf param in our queue */ 1769 ap = sctp_asconf_find_param(stcb, id); 1770 if (ap == NULL) { 1771 /* hmm... can't find this in our queue! */ 1772 break; 1773 } 1774 /* process the parameter, success flag */ 1775 sctp_asconf_process_param_ack(stcb, ap, 1); 1776 break; 1777 default: 1778 break; 1779 } /* switch */ 1780 1781 /* update remaining ASCONF-ACK message length to process */ 1782 ack_length -= SCTP_SIZE32(param_length); 1783 if (ack_length <= 0) { 1784 /* no more data in the mbuf chain */ 1785 break; 1786 } 1787 offset += SCTP_SIZE32(param_length); 1788 } /* while */ 1789 1790 /* 1791 * if there are any "sent" params still on the queue, these are 1792 * implicitly "success", or "failed" (if we got an error back) ... 1793 * so process these appropriately 1794 * 1795 * we assume that the correlation_id's are monotonically increasing 1796 * beginning from 1 and that we don't have *that* many outstanding 1797 * at any given time 1798 */ 1799 if (last_error_id == 0) 1800 last_error_id--;/* set to "max" value */ 1801 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1802 if (aa->sent == 1) { 1803 /* 1804 * implicitly successful or failed if correlation_id 1805 * < last_error_id, then success else, failure 1806 */ 1807 if (aa->ap.aph.correlation_id < last_error_id) 1808 sctp_asconf_process_param_ack(stcb, aa, 1); 1809 else 1810 sctp_asconf_process_param_ack(stcb, aa, 0); 1811 } else { 1812 /* 1813 * since we always process in order (FIFO queue) if 1814 * we reach one that hasn't been sent, the rest 1815 * should not have been sent either. so, we're 1816 * done... 1817 */ 1818 break; 1819 } 1820 } 1821 1822 /* update the next sequence number to use */ 1823 asoc->asconf_seq_out_acked++; 1824 /* remove the old ASCONF on our outbound queue */ 1825 sctp_toss_old_asconf(stcb); 1826 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1827 #ifdef SCTP_TIMER_BASED_ASCONF 1828 /* we have more params, so restart our timer */ 1829 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1830 stcb, net); 1831 #else 1832 /* we have more params, so send out more */ 1833 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1834 #endif 1835 } 1836 } 1837 1838 #ifdef INET6 1839 static uint32_t 1840 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1841 { 1842 struct sockaddr_in6 *sin6, *net6; 1843 struct sctp_nets *net; 1844 1845 if (sa->sa_family != AF_INET6) { 1846 /* wrong family */ 1847 return (0); 1848 } 1849 sin6 = (struct sockaddr_in6 *)sa; 1850 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1851 /* not link local address */ 1852 return (0); 1853 } 1854 /* hunt through our destination nets list for this scope_id */ 1855 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1856 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1857 AF_INET6) 1858 continue; 1859 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1860 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1861 continue; 1862 if (sctp_is_same_scope(sin6, net6)) { 1863 /* found one */ 1864 return (1); 1865 } 1866 } 1867 /* didn't find one */ 1868 return (0); 1869 } 1870 1871 #endif 1872 1873 /* 1874 * address management functions 1875 */ 1876 static void 1877 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1878 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1879 { 1880 int status; 1881 1882 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1883 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1884 /* subset bound, no ASCONF allowed case, so ignore */ 1885 return; 1886 } 1887 /* 1888 * note: we know this is not the subset bound, no ASCONF case eg. 1889 * this is boundall or subset bound w/ASCONF allowed 1890 */ 1891 1892 /* first, make sure it's a good address family */ 1893 switch (ifa->address.sa.sa_family) { 1894 #ifdef INET6 1895 case AF_INET6: 1896 break; 1897 #endif 1898 #ifdef INET 1899 case AF_INET: 1900 break; 1901 #endif 1902 default: 1903 return; 1904 } 1905 #ifdef INET6 1906 /* make sure we're "allowed" to add this type of addr */ 1907 if (ifa->address.sa.sa_family == AF_INET6) { 1908 /* invalid if we're not a v6 endpoint */ 1909 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1910 return; 1911 /* is the v6 addr really valid ? */ 1912 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1913 return; 1914 } 1915 } 1916 #endif 1917 /* put this address on the "pending/do not use yet" list */ 1918 sctp_add_local_addr_restricted(stcb, ifa); 1919 /* 1920 * check address scope if address is out of scope, don't queue 1921 * anything... note: this would leave the address on both inp and 1922 * asoc lists 1923 */ 1924 switch (ifa->address.sa.sa_family) { 1925 #ifdef INET6 1926 case AF_INET6: 1927 { 1928 struct sockaddr_in6 *sin6; 1929 1930 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 1931 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1932 /* we skip unspecifed addresses */ 1933 return; 1934 } 1935 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1936 if (stcb->asoc.scope.local_scope == 0) { 1937 return; 1938 } 1939 /* is it the right link local scope? */ 1940 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1941 return; 1942 } 1943 } 1944 if (stcb->asoc.scope.site_scope == 0 && 1945 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1946 return; 1947 } 1948 break; 1949 } 1950 #endif 1951 #ifdef INET 1952 case AF_INET: 1953 { 1954 struct sockaddr_in *sin; 1955 struct in6pcb *inp6; 1956 1957 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1958 /* invalid if we are a v6 only endpoint */ 1959 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1960 SCTP_IPV6_V6ONLY(inp6)) 1961 return; 1962 1963 sin = (struct sockaddr_in *)&ifa->address.sa; 1964 if (sin->sin_addr.s_addr == 0) { 1965 /* we skip unspecifed addresses */ 1966 return; 1967 } 1968 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1969 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1970 return; 1971 } 1972 break; 1973 } 1974 #endif 1975 default: 1976 /* else, not AF_INET or AF_INET6, so skip */ 1977 return; 1978 } 1979 1980 /* queue an asconf for this address add/delete */ 1981 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1982 /* does the peer do asconf? */ 1983 if (stcb->asoc.peer_supports_asconf) { 1984 /* queue an asconf for this addr */ 1985 status = sctp_asconf_queue_add(stcb, ifa, type); 1986 1987 /* 1988 * if queued ok, and in the open state, send out the 1989 * ASCONF. If in the non-open state, these will be 1990 * sent when the state goes open. 1991 */ 1992 if (status == 0 && 1993 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1994 #ifdef SCTP_TIMER_BASED_ASCONF 1995 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1996 stcb, stcb->asoc.primary_destination); 1997 #else 1998 sctp_send_asconf(stcb, NULL, addr_locked); 1999 #endif 2000 } 2001 } 2002 } 2003 } 2004 2005 2006 int 2007 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2008 { 2009 struct sctp_asconf_iterator *asc; 2010 struct sctp_ifa *ifa; 2011 struct sctp_laddr *l; 2012 int cnt_invalid = 0; 2013 2014 asc = (struct sctp_asconf_iterator *)ptr; 2015 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2016 ifa = l->ifa; 2017 switch (ifa->address.sa.sa_family) { 2018 #ifdef INET6 2019 case AF_INET6: 2020 /* invalid if we're not a v6 endpoint */ 2021 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2022 cnt_invalid++; 2023 if (asc->cnt == cnt_invalid) 2024 return (1); 2025 } 2026 break; 2027 #endif 2028 #ifdef INET 2029 case AF_INET: 2030 { 2031 /* invalid if we are a v6 only endpoint */ 2032 struct in6pcb *inp6; 2033 2034 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2035 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2036 SCTP_IPV6_V6ONLY(inp6)) { 2037 cnt_invalid++; 2038 if (asc->cnt == cnt_invalid) 2039 return (1); 2040 } 2041 break; 2042 } 2043 #endif 2044 default: 2045 /* invalid address family */ 2046 cnt_invalid++; 2047 if (asc->cnt == cnt_invalid) 2048 return (1); 2049 } 2050 } 2051 return (0); 2052 } 2053 2054 static int 2055 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2056 { 2057 struct sctp_ifa *ifa; 2058 struct sctp_asconf_iterator *asc; 2059 struct sctp_laddr *laddr, *nladdr, *l; 2060 2061 /* Only for specific case not bound all */ 2062 asc = (struct sctp_asconf_iterator *)ptr; 2063 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2064 ifa = l->ifa; 2065 if (l->action == SCTP_ADD_IP_ADDRESS) { 2066 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2067 sctp_nxt_addr) { 2068 if (laddr->ifa == ifa) { 2069 laddr->action = 0; 2070 break; 2071 } 2072 } 2073 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2074 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2075 /* remove only after all guys are done */ 2076 if (laddr->ifa == ifa) { 2077 sctp_del_local_addr_ep(inp, ifa); 2078 } 2079 } 2080 } 2081 } 2082 return (0); 2083 } 2084 2085 void 2086 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2087 void *ptr, uint32_t val SCTP_UNUSED) 2088 { 2089 struct sctp_asconf_iterator *asc; 2090 struct sctp_ifa *ifa; 2091 struct sctp_laddr *l; 2092 int cnt_invalid = 0; 2093 int type, status; 2094 int num_queued = 0; 2095 2096 asc = (struct sctp_asconf_iterator *)ptr; 2097 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2098 ifa = l->ifa; 2099 type = l->action; 2100 2101 /* address's vrf_id must be the vrf_id of the assoc */ 2102 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2103 continue; 2104 } 2105 /* Same checks again for assoc */ 2106 switch (ifa->address.sa.sa_family) { 2107 #ifdef INET6 2108 case AF_INET6: 2109 { 2110 /* invalid if we're not a v6 endpoint */ 2111 struct sockaddr_in6 *sin6; 2112 2113 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2114 cnt_invalid++; 2115 if (asc->cnt == cnt_invalid) 2116 return; 2117 else 2118 continue; 2119 } 2120 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 2121 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2122 /* we skip unspecifed addresses */ 2123 continue; 2124 } 2125 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2126 if (stcb->asoc.scope.local_scope == 0) { 2127 continue; 2128 } 2129 /* is it the right link local scope? */ 2130 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2131 continue; 2132 } 2133 } 2134 break; 2135 } 2136 #endif 2137 #ifdef INET 2138 case AF_INET: 2139 { 2140 /* invalid if we are a v6 only endpoint */ 2141 struct in6pcb *inp6; 2142 struct sockaddr_in *sin; 2143 2144 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2145 /* invalid if we are a v6 only endpoint */ 2146 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2147 SCTP_IPV6_V6ONLY(inp6)) 2148 continue; 2149 2150 sin = (struct sockaddr_in *)&ifa->address.sa; 2151 if (sin->sin_addr.s_addr == 0) { 2152 /* we skip unspecifed addresses */ 2153 continue; 2154 } 2155 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2156 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2157 continue; 2158 } 2159 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2160 SCTP_IPV6_V6ONLY(inp6)) { 2161 cnt_invalid++; 2162 if (asc->cnt == cnt_invalid) 2163 return; 2164 else 2165 continue; 2166 } 2167 break; 2168 } 2169 #endif 2170 default: 2171 /* invalid address family */ 2172 cnt_invalid++; 2173 if (asc->cnt == cnt_invalid) 2174 return; 2175 else 2176 continue; 2177 break; 2178 } 2179 2180 if (type == SCTP_ADD_IP_ADDRESS) { 2181 /* prevent this address from being used as a source */ 2182 sctp_add_local_addr_restricted(stcb, ifa); 2183 } else if (type == SCTP_DEL_IP_ADDRESS) { 2184 struct sctp_nets *net; 2185 2186 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2187 sctp_rtentry_t *rt; 2188 2189 /* delete this address if cached */ 2190 if (net->ro._s_addr == ifa) { 2191 sctp_free_ifa(net->ro._s_addr); 2192 net->ro._s_addr = NULL; 2193 net->src_addr_selected = 0; 2194 rt = net->ro.ro_rt; 2195 if (rt) { 2196 RTFREE(rt); 2197 net->ro.ro_rt = NULL; 2198 } 2199 /* 2200 * Now we deleted our src address, 2201 * should we not also now reset the 2202 * cwnd/rto to start as if its a new 2203 * address? 2204 */ 2205 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2206 net->RTO = 0; 2207 2208 } 2209 } 2210 } else if (type == SCTP_SET_PRIM_ADDR) { 2211 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2212 /* must validate the ifa is in the ep */ 2213 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2214 continue; 2215 } 2216 } else { 2217 /* Need to check scopes for this guy */ 2218 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2219 continue; 2220 } 2221 } 2222 } 2223 /* queue an asconf for this address add/delete */ 2224 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2225 stcb->asoc.peer_supports_asconf) { 2226 /* queue an asconf for this addr */ 2227 status = sctp_asconf_queue_add(stcb, ifa, type); 2228 /* 2229 * if queued ok, and in the open state, update the 2230 * count of queued params. If in the non-open 2231 * state, these get sent when the assoc goes open. 2232 */ 2233 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2234 if (status >= 0) { 2235 num_queued++; 2236 } 2237 } 2238 } 2239 } 2240 /* 2241 * If we have queued params in the open state, send out an ASCONF. 2242 */ 2243 if (num_queued > 0) { 2244 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2245 } 2246 } 2247 2248 void 2249 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2250 { 2251 struct sctp_asconf_iterator *asc; 2252 struct sctp_ifa *ifa; 2253 struct sctp_laddr *l, *nl; 2254 2255 asc = (struct sctp_asconf_iterator *)ptr; 2256 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2257 ifa = l->ifa; 2258 if (l->action == SCTP_ADD_IP_ADDRESS) { 2259 /* Clear the defer use flag */ 2260 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2261 } 2262 sctp_free_ifa(ifa); 2263 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2264 SCTP_DECR_LADDR_COUNT(); 2265 } 2266 SCTP_FREE(asc, SCTP_M_ASC_IT); 2267 } 2268 2269 /* 2270 * sa is the sockaddr to ask the peer to set primary to. 2271 * returns: 0 = completed, -1 = error 2272 */ 2273 int32_t 2274 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2275 { 2276 uint32_t vrf_id; 2277 struct sctp_ifa *ifa; 2278 2279 /* find the ifa for the desired set primary */ 2280 vrf_id = stcb->asoc.vrf_id; 2281 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2282 if (ifa == NULL) { 2283 /* Invalid address */ 2284 return (-1); 2285 } 2286 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2287 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2288 /* set primary queuing succeeded */ 2289 SCTPDBG(SCTP_DEBUG_ASCONF1, 2290 "set_primary_ip_address_sa: queued on tcb=%p, ", 2291 (void *)stcb); 2292 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2293 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2294 #ifdef SCTP_TIMER_BASED_ASCONF 2295 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2296 stcb->sctp_ep, stcb, 2297 stcb->asoc.primary_destination); 2298 #else 2299 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2300 #endif 2301 } 2302 } else { 2303 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2304 (void *)stcb); 2305 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2306 return (-1); 2307 } 2308 return (0); 2309 } 2310 2311 void 2312 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2313 { 2314 struct sctp_inpcb *inp; 2315 2316 /* go through all our PCB's */ 2317 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2318 struct sctp_tcb *stcb; 2319 2320 /* process for all associations for this endpoint */ 2321 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2322 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2323 if (!sctp_asconf_queue_add(stcb, ifa, 2324 SCTP_SET_PRIM_ADDR)) { 2325 /* set primary queuing succeeded */ 2326 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2327 (void *)stcb); 2328 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2329 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2330 #ifdef SCTP_TIMER_BASED_ASCONF 2331 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2332 stcb->sctp_ep, stcb, 2333 stcb->asoc.primary_destination); 2334 #else 2335 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2336 #endif 2337 } 2338 } 2339 } /* for each stcb */ 2340 } /* for each inp */ 2341 } 2342 2343 int 2344 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2345 { 2346 struct sctp_tmit_chunk *chk, *nchk; 2347 unsigned int offset, asconf_limit; 2348 struct sctp_asconf_chunk *acp; 2349 struct sctp_asconf_paramhdr *aph; 2350 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2351 struct sctp_paramhdr *ph; 2352 int add_cnt, del_cnt; 2353 uint16_t last_param_type; 2354 2355 add_cnt = del_cnt = 0; 2356 last_param_type = 0; 2357 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2358 if (chk->data == NULL) { 2359 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2360 continue; 2361 } 2362 offset = 0; 2363 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2364 offset += sizeof(struct sctp_asconf_chunk); 2365 asconf_limit = ntohs(acp->ch.chunk_length); 2366 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2367 if (ph == NULL) { 2368 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2369 continue; 2370 } 2371 offset += ntohs(ph->param_length); 2372 2373 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2374 if (aph == NULL) { 2375 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2376 continue; 2377 } 2378 while (aph != NULL) { 2379 unsigned int param_length, param_type; 2380 2381 param_type = ntohs(aph->ph.param_type); 2382 param_length = ntohs(aph->ph.param_length); 2383 if (offset + param_length > asconf_limit) { 2384 /* parameter goes beyond end of chunk! */ 2385 break; 2386 } 2387 if (param_length > sizeof(aparam_buf)) { 2388 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2389 break; 2390 } 2391 if (param_length <= sizeof(struct sctp_paramhdr)) { 2392 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2393 break; 2394 } 2395 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2396 if (aph == NULL) { 2397 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2398 break; 2399 } 2400 ph = (struct sctp_paramhdr *)(aph + 1); 2401 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2402 switch (param_type) { 2403 case SCTP_ADD_IP_ADDRESS: 2404 add_cnt++; 2405 break; 2406 case SCTP_DEL_IP_ADDRESS: 2407 del_cnt++; 2408 break; 2409 default: 2410 break; 2411 } 2412 last_param_type = param_type; 2413 } 2414 offset += SCTP_SIZE32(param_length); 2415 if (offset >= asconf_limit) { 2416 /* no more data in the mbuf chain */ 2417 break; 2418 } 2419 /* get pointer to next asconf param */ 2420 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2421 } 2422 } 2423 2424 /* 2425 * we want to find the sequences which consist of ADD -> DEL -> ADD 2426 * or DEL -> ADD 2427 */ 2428 if (add_cnt > del_cnt || 2429 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2430 return (1); 2431 } 2432 return (0); 2433 } 2434 2435 static struct sockaddr * 2436 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2437 { 2438 struct sctp_vrf *vrf = NULL; 2439 struct sctp_ifn *sctp_ifn; 2440 struct sctp_ifa *sctp_ifa; 2441 2442 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2443 SCTP_IPI_ADDR_RLOCK(); 2444 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2445 if (vrf == NULL) { 2446 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2447 SCTP_IPI_ADDR_RUNLOCK(); 2448 return (NULL); 2449 } 2450 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2451 if (stcb->asoc.scope.loopback_scope == 0 && 2452 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2453 /* Skip if loopback_scope not set */ 2454 continue; 2455 } 2456 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2457 switch (sctp_ifa->address.sa.sa_family) { 2458 #ifdef INET 2459 case AF_INET: 2460 if (stcb->asoc.scope.ipv4_addr_legal) { 2461 struct sockaddr_in *sin; 2462 2463 sin = (struct sockaddr_in *)&sctp_ifa->address.sa; 2464 if (sin->sin_addr.s_addr == 0) { 2465 /* skip unspecifed addresses */ 2466 continue; 2467 } 2468 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2469 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2470 continue; 2471 2472 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2473 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2474 continue; 2475 /* 2476 * found a valid local v4 address to 2477 * use 2478 */ 2479 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2480 SCTP_IPI_ADDR_RUNLOCK(); 2481 return (&sctp_ifa->address.sa); 2482 } 2483 break; 2484 #endif 2485 #ifdef INET6 2486 case AF_INET6: 2487 if (stcb->asoc.scope.ipv6_addr_legal) { 2488 struct sockaddr_in6 *sin6; 2489 2490 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2491 continue; 2492 } 2493 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa; 2494 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2495 /* 2496 * we skip unspecifed 2497 * addresses 2498 */ 2499 continue; 2500 } 2501 if (stcb->asoc.scope.local_scope == 0 && 2502 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2503 continue; 2504 if (stcb->asoc.scope.site_scope == 0 && 2505 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2506 continue; 2507 2508 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2509 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2510 continue; 2511 /* 2512 * found a valid local v6 address to 2513 * use 2514 */ 2515 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2516 SCTP_IPI_ADDR_RUNLOCK(); 2517 return (&sctp_ifa->address.sa); 2518 } 2519 break; 2520 #endif 2521 default: 2522 break; 2523 } 2524 } 2525 } 2526 /* no valid addresses found */ 2527 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2528 SCTP_IPI_ADDR_RUNLOCK(); 2529 return (NULL); 2530 } 2531 2532 static struct sockaddr * 2533 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2534 { 2535 struct sctp_laddr *laddr; 2536 2537 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2538 if (laddr->ifa == NULL) { 2539 continue; 2540 } 2541 /* is the address restricted ? */ 2542 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2543 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2544 continue; 2545 2546 /* found a valid local address to use */ 2547 return (&laddr->ifa->address.sa); 2548 } 2549 /* no valid addresses found */ 2550 return (NULL); 2551 } 2552 2553 /* 2554 * builds an ASCONF chunk from queued ASCONF params. 2555 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2556 */ 2557 struct mbuf * 2558 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2559 { 2560 struct mbuf *m_asconf, *m_asconf_chk; 2561 struct sctp_asconf_addr *aa; 2562 struct sctp_asconf_chunk *acp; 2563 struct sctp_asconf_paramhdr *aph; 2564 struct sctp_asconf_addr_param *aap; 2565 uint32_t p_length; 2566 uint32_t correlation_id = 1; /* 0 is reserved... */ 2567 caddr_t ptr, lookup_ptr; 2568 uint8_t lookup_used = 0; 2569 2570 /* are there any asconf params to send? */ 2571 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2572 if (aa->sent == 0) 2573 break; 2574 } 2575 if (aa == NULL) 2576 return (NULL); 2577 2578 /* 2579 * get a chunk header mbuf and a cluster for the asconf params since 2580 * it's simpler to fill in the asconf chunk header lookup address on 2581 * the fly 2582 */ 2583 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2584 if (m_asconf_chk == NULL) { 2585 /* no mbuf's */ 2586 SCTPDBG(SCTP_DEBUG_ASCONF1, 2587 "compose_asconf: couldn't get chunk mbuf!\n"); 2588 return (NULL); 2589 } 2590 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2591 if (m_asconf == NULL) { 2592 /* no mbuf's */ 2593 SCTPDBG(SCTP_DEBUG_ASCONF1, 2594 "compose_asconf: couldn't get mbuf!\n"); 2595 sctp_m_freem(m_asconf_chk); 2596 return (NULL); 2597 } 2598 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2599 SCTP_BUF_LEN(m_asconf) = 0; 2600 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2601 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2602 /* save pointers to lookup address and asconf params */ 2603 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2604 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2605 2606 /* fill in chunk header info */ 2607 acp->ch.chunk_type = SCTP_ASCONF; 2608 acp->ch.chunk_flags = 0; 2609 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2610 stcb->asoc.asconf_seq_out++; 2611 2612 /* add parameters... up to smallest MTU allowed */ 2613 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2614 if (aa->sent) 2615 continue; 2616 /* get the parameter length */ 2617 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2618 /* will it fit in current chunk? */ 2619 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2620 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2621 /* won't fit, so we're done with this chunk */ 2622 break; 2623 } 2624 /* assign (and store) a correlation id */ 2625 aa->ap.aph.correlation_id = correlation_id++; 2626 2627 /* 2628 * fill in address if we're doing a delete this is a simple 2629 * way for us to fill in the correlation address, which 2630 * should only be used by the peer if we're deleting our 2631 * source address and adding a new address (e.g. renumbering 2632 * case) 2633 */ 2634 if (lookup_used == 0 && 2635 (aa->special_del == 0) && 2636 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2637 struct sctp_ipv6addr_param *lookup; 2638 uint16_t p_size, addr_size; 2639 2640 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2641 lookup->ph.param_type = 2642 htons(aa->ap.addrp.ph.param_type); 2643 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2644 /* copy IPv6 address */ 2645 p_size = sizeof(struct sctp_ipv6addr_param); 2646 addr_size = sizeof(struct in6_addr); 2647 } else { 2648 /* copy IPv4 address */ 2649 p_size = sizeof(struct sctp_ipv4addr_param); 2650 addr_size = sizeof(struct in_addr); 2651 } 2652 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2653 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2654 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2655 lookup_used = 1; 2656 } 2657 /* copy into current space */ 2658 memcpy(ptr, &aa->ap, p_length); 2659 2660 /* network elements and update lengths */ 2661 aph = (struct sctp_asconf_paramhdr *)ptr; 2662 aap = (struct sctp_asconf_addr_param *)ptr; 2663 /* correlation_id is transparent to peer, no htonl needed */ 2664 aph->ph.param_type = htons(aph->ph.param_type); 2665 aph->ph.param_length = htons(aph->ph.param_length); 2666 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2667 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2668 2669 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2670 ptr += SCTP_SIZE32(p_length); 2671 2672 /* 2673 * these params are removed off the pending list upon 2674 * getting an ASCONF-ACK back from the peer, just set flag 2675 */ 2676 aa->sent = 1; 2677 } 2678 /* check to see if the lookup addr has been populated yet */ 2679 if (lookup_used == 0) { 2680 /* NOTE: if the address param is optional, can skip this... */ 2681 /* add any valid (existing) address... */ 2682 struct sctp_ipv6addr_param *lookup; 2683 uint16_t p_size, addr_size; 2684 struct sockaddr *found_addr; 2685 caddr_t addr_ptr; 2686 2687 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2688 found_addr = sctp_find_valid_localaddr(stcb, 2689 addr_locked); 2690 else 2691 found_addr = sctp_find_valid_localaddr_ep(stcb); 2692 2693 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2694 if (found_addr != NULL) { 2695 switch (found_addr->sa_family) { 2696 #ifdef INET6 2697 case AF_INET6: 2698 /* copy IPv6 address */ 2699 lookup->ph.param_type = 2700 htons(SCTP_IPV6_ADDRESS); 2701 p_size = sizeof(struct sctp_ipv6addr_param); 2702 addr_size = sizeof(struct in6_addr); 2703 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2704 found_addr)->sin6_addr; 2705 break; 2706 #endif 2707 #ifdef INET 2708 case AF_INET: 2709 /* copy IPv4 address */ 2710 lookup->ph.param_type = 2711 htons(SCTP_IPV4_ADDRESS); 2712 p_size = sizeof(struct sctp_ipv4addr_param); 2713 addr_size = sizeof(struct in_addr); 2714 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2715 found_addr)->sin_addr; 2716 break; 2717 #endif 2718 default: 2719 p_size = 0; 2720 addr_size = 0; 2721 addr_ptr = NULL; 2722 break; 2723 } 2724 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2725 memcpy(lookup->addr, addr_ptr, addr_size); 2726 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2727 } else { 2728 /* uh oh... don't have any address?? */ 2729 SCTPDBG(SCTP_DEBUG_ASCONF1, 2730 "compose_asconf: no lookup addr!\n"); 2731 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2732 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2733 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2734 bzero(lookup->addr, sizeof(struct in_addr)); 2735 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2736 } 2737 } 2738 /* chain it all together */ 2739 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2740 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2741 acp->ch.chunk_length = htons(*retlen); 2742 2743 return (m_asconf_chk); 2744 } 2745 2746 /* 2747 * section to handle address changes before an association is up eg. changes 2748 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2749 */ 2750 2751 /* 2752 * processes the (local) addresses in the INIT-ACK chunk 2753 */ 2754 static void 2755 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2756 unsigned int offset, unsigned int length) 2757 { 2758 struct sctp_paramhdr tmp_param, *ph; 2759 uint16_t plen, ptype; 2760 struct sctp_ifa *sctp_ifa; 2761 2762 #ifdef INET6 2763 struct sctp_ipv6addr_param addr6_store; 2764 struct sockaddr_in6 sin6; 2765 2766 #endif 2767 #ifdef INET 2768 struct sctp_ipv4addr_param addr4_store; 2769 struct sockaddr_in sin; 2770 2771 #endif 2772 struct sockaddr *sa; 2773 uint32_t vrf_id; 2774 2775 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2776 if (stcb == NULL) /* Un-needed check for SA */ 2777 return; 2778 2779 /* convert to upper bound */ 2780 length += offset; 2781 2782 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2783 return; 2784 } 2785 /* init the addresses */ 2786 #ifdef INET6 2787 bzero(&sin6, sizeof(sin6)); 2788 sin6.sin6_family = AF_INET6; 2789 sin6.sin6_len = sizeof(sin6); 2790 sin6.sin6_port = stcb->rport; 2791 #endif 2792 2793 #ifdef INET 2794 bzero(&sin, sizeof(sin)); 2795 sin.sin_family = AF_INET; 2796 sin.sin_len = sizeof(sin); 2797 sin.sin_port = stcb->rport; 2798 #endif 2799 2800 /* go through the addresses in the init-ack */ 2801 ph = (struct sctp_paramhdr *) 2802 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2803 (uint8_t *) & tmp_param); 2804 while (ph != NULL) { 2805 ptype = ntohs(ph->param_type); 2806 plen = ntohs(ph->param_length); 2807 switch (ptype) { 2808 #ifdef INET6 2809 case SCTP_IPV6_ADDRESS: 2810 { 2811 struct sctp_ipv6addr_param *a6p; 2812 2813 /* get the entire IPv6 address param */ 2814 a6p = (struct sctp_ipv6addr_param *) 2815 sctp_m_getptr(m, offset, 2816 sizeof(struct sctp_ipv6addr_param), 2817 (uint8_t *) & addr6_store); 2818 if (plen != sizeof(struct sctp_ipv6addr_param) || 2819 a6p == NULL) { 2820 return; 2821 } 2822 memcpy(&sin6.sin6_addr, a6p->addr, 2823 sizeof(struct in6_addr)); 2824 sa = (struct sockaddr *)&sin6; 2825 break; 2826 } 2827 #endif 2828 #ifdef INET 2829 case SCTP_IPV4_ADDRESS: 2830 { 2831 struct sctp_ipv4addr_param *a4p; 2832 2833 /* get the entire IPv4 address param */ 2834 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2835 sizeof(struct sctp_ipv4addr_param), 2836 (uint8_t *) & addr4_store); 2837 if (plen != sizeof(struct sctp_ipv4addr_param) || 2838 a4p == NULL) { 2839 return; 2840 } 2841 sin.sin_addr.s_addr = a4p->addr; 2842 sa = (struct sockaddr *)&sin; 2843 break; 2844 } 2845 #endif 2846 default: 2847 goto next_addr; 2848 } 2849 2850 /* see if this address really (still) exists */ 2851 if (stcb) { 2852 vrf_id = stcb->asoc.vrf_id; 2853 } else { 2854 vrf_id = SCTP_DEFAULT_VRFID; 2855 } 2856 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id, 2857 SCTP_ADDR_NOT_LOCKED); 2858 if (sctp_ifa == NULL) { 2859 /* address doesn't exist anymore */ 2860 int status; 2861 2862 /* are ASCONFs allowed ? */ 2863 if ((sctp_is_feature_on(stcb->sctp_ep, 2864 SCTP_PCB_FLAGS_DO_ASCONF)) && 2865 stcb->asoc.peer_supports_asconf) { 2866 /* queue an ASCONF DEL_IP_ADDRESS */ 2867 status = sctp_asconf_queue_sa_delete(stcb, sa); 2868 /* 2869 * if queued ok, and in correct state, send 2870 * out the ASCONF. 2871 */ 2872 if (status == 0 && 2873 SCTP_GET_STATE(&stcb->asoc) == 2874 SCTP_STATE_OPEN) { 2875 #ifdef SCTP_TIMER_BASED_ASCONF 2876 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2877 stcb->sctp_ep, stcb, 2878 stcb->asoc.primary_destination); 2879 #else 2880 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2881 #endif 2882 } 2883 } 2884 } 2885 next_addr: 2886 /* 2887 * Sanity check: Make sure the length isn't 0, otherwise 2888 * we'll be stuck in this loop for a long time... 2889 */ 2890 if (SCTP_SIZE32(plen) == 0) { 2891 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2892 plen, ptype); 2893 return; 2894 } 2895 /* get next parameter */ 2896 offset += SCTP_SIZE32(plen); 2897 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2898 return; 2899 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2900 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2901 } /* while */ 2902 } 2903 2904 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2905 /* 2906 * checks to see if a specific address is in the initack address list returns 2907 * 1 if found, 0 if not 2908 */ 2909 static uint32_t 2910 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2911 { 2912 struct sctp_paramhdr tmp_param, *ph; 2913 uint16_t plen, ptype; 2914 2915 #ifdef INET 2916 struct sockaddr_in *sin; 2917 struct sctp_ipv4addr_param *a4p; 2918 struct sctp_ipv6addr_param addr4_store; 2919 2920 #endif 2921 #ifdef INET6 2922 struct sockaddr_in6 *sin6; 2923 struct sctp_ipv6addr_param *a6p; 2924 struct sctp_ipv6addr_param addr6_store; 2925 struct sockaddr_in6 sin6_tmp; 2926 2927 #endif 2928 2929 switch (sa->sa_family) { 2930 #ifdef INET 2931 case AF_INET: 2932 break; 2933 #endif 2934 #ifdef INET6 2935 case AF_INET6: 2936 break; 2937 #endif 2938 default: 2939 return (0); 2940 } 2941 2942 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2943 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2944 /* convert to upper bound */ 2945 length += offset; 2946 2947 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2948 SCTPDBG(SCTP_DEBUG_ASCONF1, 2949 "find_initack_addr: invalid offset?\n"); 2950 return (0); 2951 } 2952 /* go through the addresses in the init-ack */ 2953 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2954 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2955 while (ph != NULL) { 2956 ptype = ntohs(ph->param_type); 2957 plen = ntohs(ph->param_length); 2958 switch (ptype) { 2959 #ifdef INET6 2960 case SCTP_IPV6_ADDRESS: 2961 if (sa->sa_family == AF_INET6) { 2962 /* get the entire IPv6 address param */ 2963 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2964 break; 2965 } 2966 /* get the entire IPv6 address param */ 2967 a6p = (struct sctp_ipv6addr_param *) 2968 sctp_m_getptr(m, offset, 2969 sizeof(struct sctp_ipv6addr_param), 2970 (uint8_t *) & addr6_store); 2971 if (a6p == NULL) { 2972 return (0); 2973 } 2974 sin6 = (struct sockaddr_in6 *)sa; 2975 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2976 /* create a copy and clear scope */ 2977 memcpy(&sin6_tmp, sin6, 2978 sizeof(struct sockaddr_in6)); 2979 sin6 = &sin6_tmp; 2980 in6_clearscope(&sin6->sin6_addr); 2981 } 2982 if (memcmp(&sin6->sin6_addr, a6p->addr, 2983 sizeof(struct in6_addr)) == 0) { 2984 /* found it */ 2985 return (1); 2986 } 2987 } 2988 break; 2989 #endif /* INET6 */ 2990 #ifdef INET 2991 case SCTP_IPV4_ADDRESS: 2992 if (sa->sa_family == AF_INET) { 2993 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2994 break; 2995 } 2996 /* get the entire IPv4 address param */ 2997 a4p = (struct sctp_ipv4addr_param *) 2998 sctp_m_getptr(m, offset, 2999 sizeof(struct sctp_ipv4addr_param), 3000 (uint8_t *) & addr4_store); 3001 if (a4p == NULL) { 3002 return (0); 3003 } 3004 sin = (struct sockaddr_in *)sa; 3005 if (sin->sin_addr.s_addr == a4p->addr) { 3006 /* found it */ 3007 return (1); 3008 } 3009 } 3010 break; 3011 #endif 3012 default: 3013 break; 3014 } 3015 /* get next parameter */ 3016 offset += SCTP_SIZE32(plen); 3017 if (offset + sizeof(struct sctp_paramhdr) > length) { 3018 return (0); 3019 } 3020 ph = (struct sctp_paramhdr *) 3021 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3022 (uint8_t *) & tmp_param); 3023 } /* while */ 3024 /* not found! */ 3025 return (0); 3026 } 3027 3028 /* 3029 * makes sure that the current endpoint local addr list is consistent with 3030 * the new association (eg. subset bound, asconf allowed) adds addresses as 3031 * necessary 3032 */ 3033 static void 3034 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3035 int length, struct sockaddr *init_addr) 3036 { 3037 struct sctp_laddr *laddr; 3038 3039 /* go through the endpoint list */ 3040 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3041 /* be paranoid and validate the laddr */ 3042 if (laddr->ifa == NULL) { 3043 SCTPDBG(SCTP_DEBUG_ASCONF1, 3044 "check_addr_list_ep: laddr->ifa is NULL"); 3045 continue; 3046 } 3047 if (laddr->ifa == NULL) { 3048 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3049 continue; 3050 } 3051 /* do i have it implicitly? */ 3052 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3053 continue; 3054 } 3055 /* check to see if in the init-ack */ 3056 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3057 /* try to add it */ 3058 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3059 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3060 } 3061 } 3062 } 3063 3064 /* 3065 * makes sure that the current kernel address list is consistent with the new 3066 * association (with all addrs bound) adds addresses as necessary 3067 */ 3068 static void 3069 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3070 int length, struct sockaddr *init_addr, 3071 uint16_t local_scope, uint16_t site_scope, 3072 uint16_t ipv4_scope, uint16_t loopback_scope) 3073 { 3074 struct sctp_vrf *vrf = NULL; 3075 struct sctp_ifn *sctp_ifn; 3076 struct sctp_ifa *sctp_ifa; 3077 uint32_t vrf_id; 3078 3079 #ifdef INET 3080 struct sockaddr_in *sin; 3081 3082 #endif 3083 #ifdef INET6 3084 struct sockaddr_in6 *sin6; 3085 3086 #endif 3087 3088 if (stcb) { 3089 vrf_id = stcb->asoc.vrf_id; 3090 } else { 3091 return; 3092 } 3093 SCTP_IPI_ADDR_RLOCK(); 3094 vrf = sctp_find_vrf(vrf_id); 3095 if (vrf == NULL) { 3096 SCTP_IPI_ADDR_RUNLOCK(); 3097 return; 3098 } 3099 /* go through all our known interfaces */ 3100 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3101 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3102 /* skip loopback interface */ 3103 continue; 3104 } 3105 /* go through each interface address */ 3106 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3107 /* do i have it implicitly? */ 3108 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3109 continue; 3110 } 3111 switch (sctp_ifa->address.sa.sa_family) { 3112 #ifdef INET 3113 case AF_INET: 3114 sin = (struct sockaddr_in *)&sctp_ifa->address.sin; 3115 if ((ipv4_scope == 0) && 3116 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3117 /* private address not in scope */ 3118 continue; 3119 } 3120 break; 3121 #endif 3122 #ifdef INET6 3123 case AF_INET6: 3124 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sin6; 3125 if ((local_scope == 0) && 3126 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3127 continue; 3128 } 3129 if ((site_scope == 0) && 3130 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3131 continue; 3132 } 3133 break; 3134 #endif 3135 default: 3136 break; 3137 } 3138 /* check to see if in the init-ack */ 3139 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3140 /* try to add it */ 3141 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3142 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3143 SCTP_ADDR_LOCKED); 3144 } 3145 } /* end foreach ifa */ 3146 } /* end foreach ifn */ 3147 SCTP_IPI_ADDR_RUNLOCK(); 3148 } 3149 3150 /* 3151 * validates an init-ack chunk (from a cookie-echo) with current addresses 3152 * adds addresses from the init-ack into our local address list, if needed 3153 * queues asconf adds/deletes addresses as needed and makes appropriate list 3154 * changes for source address selection m, offset: points to the start of the 3155 * address list in an init-ack chunk length: total length of the address 3156 * params only init_addr: address where my INIT-ACK was sent from 3157 */ 3158 void 3159 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3160 int length, struct sockaddr *init_addr, 3161 uint16_t local_scope, uint16_t site_scope, 3162 uint16_t ipv4_scope, uint16_t loopback_scope) 3163 { 3164 /* process the local addresses in the initack */ 3165 sctp_process_initack_addresses(stcb, m, offset, length); 3166 3167 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3168 /* bound all case */ 3169 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3170 local_scope, site_scope, ipv4_scope, loopback_scope); 3171 } else { 3172 /* subset bound case */ 3173 if (sctp_is_feature_on(stcb->sctp_ep, 3174 SCTP_PCB_FLAGS_DO_ASCONF)) { 3175 /* asconf's allowed */ 3176 sctp_check_address_list_ep(stcb, m, offset, length, 3177 init_addr); 3178 } 3179 /* else, no asconfs allowed, so what we sent is what we get */ 3180 } 3181 } 3182 3183 /* 3184 * sctp_bindx() support 3185 */ 3186 uint32_t 3187 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3188 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3189 { 3190 struct sctp_ifa *ifa; 3191 struct sctp_laddr *laddr, *nladdr; 3192 3193 if (sa->sa_len == 0) { 3194 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3195 return (EINVAL); 3196 } 3197 if (sctp_ifap) { 3198 ifa = sctp_ifap; 3199 } else if (type == SCTP_ADD_IP_ADDRESS) { 3200 /* For an add the address MUST be on the system */ 3201 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3202 } else if (type == SCTP_DEL_IP_ADDRESS) { 3203 /* For a delete we need to find it in the inp */ 3204 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3205 } else { 3206 ifa = NULL; 3207 } 3208 if (ifa != NULL) { 3209 if (type == SCTP_ADD_IP_ADDRESS) { 3210 sctp_add_local_addr_ep(inp, ifa, type); 3211 } else if (type == SCTP_DEL_IP_ADDRESS) { 3212 if (inp->laddr_count < 2) { 3213 /* can't delete the last local address */ 3214 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3215 return (EINVAL); 3216 } 3217 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3218 sctp_nxt_addr) { 3219 if (ifa == laddr->ifa) { 3220 /* Mark in the delete */ 3221 laddr->action = type; 3222 } 3223 } 3224 } 3225 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3226 /* 3227 * There is no need to start the iterator if the inp 3228 * has no associations. 3229 */ 3230 if (type == SCTP_DEL_IP_ADDRESS) { 3231 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3232 if (laddr->ifa == ifa) { 3233 sctp_del_local_addr_ep(inp, ifa); 3234 } 3235 } 3236 } 3237 } else { 3238 struct sctp_asconf_iterator *asc; 3239 struct sctp_laddr *wi; 3240 3241 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3242 sizeof(struct sctp_asconf_iterator), 3243 SCTP_M_ASC_IT); 3244 if (asc == NULL) { 3245 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3246 return (ENOMEM); 3247 } 3248 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3249 if (wi == NULL) { 3250 SCTP_FREE(asc, SCTP_M_ASC_IT); 3251 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3252 return (ENOMEM); 3253 } 3254 LIST_INIT(&asc->list_of_work); 3255 asc->cnt = 1; 3256 SCTP_INCR_LADDR_COUNT(); 3257 wi->ifa = ifa; 3258 wi->action = type; 3259 atomic_add_int(&ifa->refcount, 1); 3260 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3261 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3262 sctp_asconf_iterator_stcb, 3263 sctp_asconf_iterator_ep_end, 3264 SCTP_PCB_ANY_FLAGS, 3265 SCTP_PCB_ANY_FEATURES, 3266 SCTP_ASOC_ANY_STATE, 3267 (void *)asc, 0, 3268 sctp_asconf_iterator_end, inp, 0); 3269 } 3270 return (0); 3271 } else { 3272 /* invalid address! */ 3273 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3274 return (EADDRNOTAVAIL); 3275 } 3276 } 3277 3278 void 3279 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3280 struct sctp_nets *net) 3281 { 3282 struct sctp_asconf_addr *aa; 3283 struct sctp_ifa *sctp_ifap; 3284 struct sctp_asconf_tag_param *vtag; 3285 3286 #ifdef INET 3287 struct sockaddr_in *to; 3288 3289 #endif 3290 #ifdef INET6 3291 struct sockaddr_in6 *to6; 3292 3293 #endif 3294 if (net == NULL) { 3295 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3296 return; 3297 } 3298 if (stcb == NULL) { 3299 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3300 return; 3301 } 3302 /* 3303 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3304 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3305 */ 3306 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3307 SCTP_M_ASC_ADDR); 3308 if (aa == NULL) { 3309 /* didn't get memory */ 3310 SCTPDBG(SCTP_DEBUG_ASCONF1, 3311 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3312 return; 3313 } 3314 aa->special_del = 0; 3315 /* fill in asconf address parameter fields */ 3316 /* top level elements are "networked" during send */ 3317 aa->ifa = NULL; 3318 aa->sent = 0; /* clear sent flag */ 3319 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3320 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3321 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3322 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3323 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3324 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3325 3326 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3327 SCTP_M_ASC_ADDR); 3328 if (aa == NULL) { 3329 /* didn't get memory */ 3330 SCTPDBG(SCTP_DEBUG_ASCONF1, 3331 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3332 return; 3333 } 3334 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3335 /* fill in asconf address parameter fields */ 3336 /* ADD(0.0.0.0) */ 3337 switch (net->ro._l_addr.sa.sa_family) { 3338 #ifdef INET 3339 case AF_INET: 3340 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3341 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3342 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3343 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3344 /* No need to add an address, we are using 0.0.0.0 */ 3345 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3346 break; 3347 #endif 3348 #ifdef INET6 3349 case AF_INET6: 3350 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3351 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3352 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3353 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3354 /* No need to add an address, we are using 0.0.0.0 */ 3355 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3356 break; 3357 #endif 3358 } 3359 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3360 SCTP_M_ASC_ADDR); 3361 if (aa == NULL) { 3362 /* didn't get memory */ 3363 SCTPDBG(SCTP_DEBUG_ASCONF1, 3364 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3365 return; 3366 } 3367 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3368 /* fill in asconf address parameter fields */ 3369 /* ADD(0.0.0.0) */ 3370 switch (net->ro._l_addr.sa.sa_family) { 3371 #ifdef INET 3372 case AF_INET: 3373 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3374 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3375 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3376 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3377 /* No need to add an address, we are using 0.0.0.0 */ 3378 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3379 break; 3380 #endif 3381 #ifdef INET6 3382 case AF_INET6: 3383 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3384 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3385 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3386 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3387 /* No need to add an address, we are using 0.0.0.0 */ 3388 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3389 break; 3390 #endif 3391 } 3392 /* Now we must hunt the addresses and add all global addresses */ 3393 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3394 struct sctp_vrf *vrf = NULL; 3395 struct sctp_ifn *sctp_ifnp; 3396 uint32_t vrf_id; 3397 3398 vrf_id = stcb->sctp_ep->def_vrf_id; 3399 vrf = sctp_find_vrf(vrf_id); 3400 if (vrf == NULL) { 3401 goto skip_rest; 3402 } 3403 SCTP_IPI_ADDR_RLOCK(); 3404 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3405 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3406 switch (sctp_ifap->address.sa.sa_family) { 3407 #ifdef INET 3408 case AF_INET: 3409 to = &sctp_ifap->address.sin; 3410 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3411 continue; 3412 } 3413 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3414 continue; 3415 } 3416 break; 3417 #endif 3418 #ifdef INET6 3419 case AF_INET6: 3420 to6 = &sctp_ifap->address.sin6; 3421 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3422 continue; 3423 } 3424 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3425 continue; 3426 } 3427 break; 3428 #endif 3429 default: 3430 continue; 3431 } 3432 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3433 } 3434 } 3435 SCTP_IPI_ADDR_RUNLOCK(); 3436 } else { 3437 struct sctp_laddr *laddr; 3438 3439 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3440 if (laddr->ifa == NULL) { 3441 continue; 3442 } 3443 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3444 /* 3445 * Address being deleted by the system, dont 3446 * list. 3447 */ 3448 continue; 3449 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3450 /* 3451 * Address being deleted on this ep don't 3452 * list. 3453 */ 3454 continue; 3455 } 3456 sctp_ifap = laddr->ifa; 3457 switch (sctp_ifap->address.sa.sa_family) { 3458 #ifdef INET 3459 case AF_INET: 3460 to = &sctp_ifap->address.sin; 3461 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3462 continue; 3463 } 3464 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3465 continue; 3466 } 3467 break; 3468 #endif 3469 #ifdef INET6 3470 case AF_INET6: 3471 to6 = &sctp_ifap->address.sin6; 3472 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3473 continue; 3474 } 3475 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3476 continue; 3477 } 3478 break; 3479 #endif 3480 default: 3481 continue; 3482 } 3483 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3484 } 3485 } 3486 skip_rest: 3487 /* Now we must send the asconf into the queue */ 3488 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3489 }
Cache object: a7d1be315879181159e93ae57b1bb15b
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