Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_asconf.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2011, 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 /* $KAME: sctp_asconf.c,v 1.24 2005/03/06 16:04:16 itojun Exp $ */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD: releng/8.3/sys/netinet/sctp_asconf.c 231492 2012-02-11 00:57:08Z tuexen $"); 37 #include <netinet/sctp_os.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctp_header.h> 42 #include <netinet/sctputil.h> 43 #include <netinet/sctp_output.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_timer.h> 46 47 /* 48 * debug flags: 49 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 50 * SCTP_DEBUG_ASCONF2: detailed info 51 */ 52 #ifdef SCTP_DEBUG 53 #endif /* SCTP_DEBUG */ 54 55 56 static void 57 sctp_asconf_get_source_ip(struct mbuf *m, struct sockaddr *sa) 58 { 59 struct ip *iph; 60 61 #ifdef INET 62 struct sockaddr_in *sin; 63 64 #endif 65 #ifdef INET6 66 struct sockaddr_in6 *sin6; 67 68 #endif 69 70 iph = mtod(m, struct ip *); 71 switch (iph->ip_v) { 72 #ifdef INET 73 case IPVERSION: 74 { 75 /* IPv4 source */ 76 sin = (struct sockaddr_in *)sa; 77 bzero(sin, sizeof(*sin)); 78 sin->sin_family = AF_INET; 79 sin->sin_len = sizeof(struct sockaddr_in); 80 sin->sin_port = 0; 81 sin->sin_addr.s_addr = iph->ip_src.s_addr; 82 break; 83 } 84 #endif 85 #ifdef INET6 86 case (IPV6_VERSION >> 4): 87 { 88 /* IPv6 source */ 89 struct ip6_hdr *ip6; 90 91 sin6 = (struct sockaddr_in6 *)sa; 92 bzero(sin6, sizeof(*sin6)); 93 sin6->sin6_family = AF_INET6; 94 sin6->sin6_len = sizeof(struct sockaddr_in6); 95 sin6->sin6_port = 0; 96 ip6 = mtod(m, struct ip6_hdr *); 97 sin6->sin6_addr = ip6->ip6_src; 98 break; 99 } 100 #endif /* INET6 */ 101 default: 102 break; 103 } 104 return; 105 } 106 107 /* 108 * draft-ietf-tsvwg-addip-sctp 109 * 110 * An ASCONF parameter queue exists per asoc which holds the pending address 111 * operations. Lists are updated upon receipt of ASCONF-ACK. 112 * 113 * A restricted_addrs list exists per assoc to hold local addresses that are 114 * not (yet) usable by the assoc as a source address. These addresses are 115 * either pending an ASCONF operation (and exist on the ASCONF parameter 116 * queue), or they are permanently restricted (the peer has returned an 117 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 118 * 119 * Deleted addresses are always immediately removed from the lists as they will 120 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 121 * only if allowed. 122 */ 123 124 /* 125 * ASCONF parameter processing. 126 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 127 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 128 * FIX: allocating this many mbufs on the fly is pretty inefficient... 129 */ 130 static struct mbuf * 131 sctp_asconf_success_response(uint32_t id) 132 { 133 struct mbuf *m_reply = NULL; 134 struct sctp_asconf_paramhdr *aph; 135 136 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 137 0, M_DONTWAIT, 1, MT_DATA); 138 if (m_reply == NULL) { 139 SCTPDBG(SCTP_DEBUG_ASCONF1, 140 "asconf_success_response: couldn't get mbuf!\n"); 141 return (NULL); 142 } 143 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 144 aph->correlation_id = id; 145 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 146 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 147 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 148 aph->ph.param_length = htons(aph->ph.param_length); 149 150 return (m_reply); 151 } 152 153 static struct mbuf * 154 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv, 155 uint16_t tlv_length) 156 { 157 struct mbuf *m_reply = NULL; 158 struct sctp_asconf_paramhdr *aph; 159 struct sctp_error_cause *error; 160 uint8_t *tlv; 161 162 m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) + 163 tlv_length + 164 sizeof(struct sctp_error_cause)), 165 0, M_DONTWAIT, 1, MT_DATA); 166 if (m_reply == NULL) { 167 SCTPDBG(SCTP_DEBUG_ASCONF1, 168 "asconf_error_response: couldn't get mbuf!\n"); 169 return (NULL); 170 } 171 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 172 error = (struct sctp_error_cause *)(aph + 1); 173 174 aph->correlation_id = id; 175 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 176 error->code = htons(cause); 177 error->length = tlv_length + sizeof(struct sctp_error_cause); 178 aph->ph.param_length = error->length + 179 sizeof(struct sctp_asconf_paramhdr); 180 181 if (aph->ph.param_length > MLEN) { 182 SCTPDBG(SCTP_DEBUG_ASCONF1, 183 "asconf_error_response: tlv_length (%xh) too big\n", 184 tlv_length); 185 sctp_m_freem(m_reply); /* discard */ 186 return (NULL); 187 } 188 if (error_tlv != NULL) { 189 tlv = (uint8_t *) (error + 1); 190 memcpy(tlv, error_tlv, tlv_length); 191 } 192 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 193 error->length = htons(error->length); 194 aph->ph.param_length = htons(aph->ph.param_length); 195 196 return (m_reply); 197 } 198 199 static struct mbuf * 200 sctp_process_asconf_add_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph, 201 struct sctp_tcb *stcb, int send_hb, int response_required) 202 { 203 struct sctp_nets *net; 204 struct mbuf *m_reply = NULL; 205 struct sockaddr_storage sa_source, sa_store; 206 struct sctp_paramhdr *ph; 207 uint16_t param_type, param_length, aparam_length; 208 struct sockaddr *sa; 209 int zero_address = 0; 210 int bad_address = 0; 211 212 #ifdef INET 213 struct sockaddr_in *sin; 214 struct sctp_ipv4addr_param *v4addr; 215 216 #endif 217 #ifdef INET6 218 struct sockaddr_in6 *sin6; 219 struct sctp_ipv6addr_param *v6addr; 220 221 #endif 222 223 aparam_length = ntohs(aph->ph.param_length); 224 ph = (struct sctp_paramhdr *)(aph + 1); 225 param_type = ntohs(ph->param_type); 226 param_length = ntohs(ph->param_length); 227 228 sa = (struct sockaddr *)&sa_store; 229 switch (param_type) { 230 #ifdef INET 231 case SCTP_IPV4_ADDRESS: 232 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 233 /* invalid param size */ 234 return (NULL); 235 } 236 v4addr = (struct sctp_ipv4addr_param *)ph; 237 sin = (struct sockaddr_in *)&sa_store; 238 bzero(sin, sizeof(*sin)); 239 sin->sin_family = AF_INET; 240 sin->sin_len = sizeof(struct sockaddr_in); 241 sin->sin_port = stcb->rport; 242 sin->sin_addr.s_addr = v4addr->addr; 243 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 244 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 245 bad_address = 1; 246 } 247 if (sin->sin_addr.s_addr == INADDR_ANY) 248 zero_address = 1; 249 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 250 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 251 break; 252 #endif 253 #ifdef INET6 254 case SCTP_IPV6_ADDRESS: 255 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 256 /* invalid param size */ 257 return (NULL); 258 } 259 v6addr = (struct sctp_ipv6addr_param *)ph; 260 sin6 = (struct sockaddr_in6 *)&sa_store; 261 bzero(sin6, sizeof(*sin6)); 262 sin6->sin6_family = AF_INET6; 263 sin6->sin6_len = sizeof(struct sockaddr_in6); 264 sin6->sin6_port = stcb->rport; 265 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 266 sizeof(struct in6_addr)); 267 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 268 bad_address = 1; 269 } 270 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 271 zero_address = 1; 272 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 273 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 274 break; 275 #endif 276 default: 277 m_reply = sctp_asconf_error_response(aph->correlation_id, 278 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 279 aparam_length); 280 return (m_reply); 281 } /* end switch */ 282 283 /* if 0.0.0.0/::0, add the source address instead */ 284 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 285 sa = (struct sockaddr *)&sa_source; 286 sctp_asconf_get_source_ip(m, sa); 287 SCTPDBG(SCTP_DEBUG_ASCONF1, 288 "process_asconf_add_ip: using source addr "); 289 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 290 } 291 /* add the address */ 292 if (bad_address) { 293 m_reply = sctp_asconf_error_response(aph->correlation_id, 294 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 295 aparam_length); 296 } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE, 297 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 298 SCTPDBG(SCTP_DEBUG_ASCONF1, 299 "process_asconf_add_ip: error adding address\n"); 300 m_reply = sctp_asconf_error_response(aph->correlation_id, 301 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph, 302 aparam_length); 303 } else { 304 /* notify upper layer */ 305 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 306 if (response_required) { 307 m_reply = 308 sctp_asconf_success_response(aph->correlation_id); 309 } 310 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 311 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 312 stcb, net); 313 if (send_hb) { 314 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 315 } 316 } 317 return (m_reply); 318 } 319 320 static int 321 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 322 { 323 struct sctp_nets *src_net, *net; 324 325 /* make sure the source address exists as a destination net */ 326 src_net = sctp_findnet(stcb, src); 327 if (src_net == NULL) { 328 /* not found */ 329 return (-1); 330 } 331 /* delete all destination addresses except the source */ 332 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 333 if (net != src_net) { 334 /* delete this address */ 335 sctp_remove_net(stcb, net); 336 SCTPDBG(SCTP_DEBUG_ASCONF1, 337 "asconf_del_remote_addrs_except: deleting "); 338 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 339 (struct sockaddr *)&net->ro._l_addr); 340 /* notify upper layer */ 341 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 342 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 343 } 344 } 345 return (0); 346 } 347 348 static struct mbuf * 349 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph, 350 struct sctp_tcb *stcb, int response_required) 351 { 352 struct mbuf *m_reply = NULL; 353 struct sockaddr_storage sa_source, sa_store; 354 struct sctp_paramhdr *ph; 355 uint16_t param_type, param_length, aparam_length; 356 struct sockaddr *sa; 357 int zero_address = 0; 358 int result; 359 360 #ifdef INET 361 struct sockaddr_in *sin; 362 struct sctp_ipv4addr_param *v4addr; 363 364 #endif 365 #ifdef INET6 366 struct sockaddr_in6 *sin6; 367 struct sctp_ipv6addr_param *v6addr; 368 369 #endif 370 371 /* get the source IP address for src and 0.0.0.0/::0 delete checks */ 372 sctp_asconf_get_source_ip(m, (struct sockaddr *)&sa_source); 373 374 aparam_length = ntohs(aph->ph.param_length); 375 ph = (struct sctp_paramhdr *)(aph + 1); 376 param_type = ntohs(ph->param_type); 377 param_length = ntohs(ph->param_length); 378 379 sa = (struct sockaddr *)&sa_store; 380 switch (param_type) { 381 #ifdef INET 382 case SCTP_IPV4_ADDRESS: 383 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 384 /* invalid param size */ 385 return (NULL); 386 } 387 v4addr = (struct sctp_ipv4addr_param *)ph; 388 sin = (struct sockaddr_in *)&sa_store; 389 bzero(sin, sizeof(*sin)); 390 sin->sin_family = AF_INET; 391 sin->sin_len = sizeof(struct sockaddr_in); 392 sin->sin_port = stcb->rport; 393 sin->sin_addr.s_addr = v4addr->addr; 394 if (sin->sin_addr.s_addr == INADDR_ANY) 395 zero_address = 1; 396 SCTPDBG(SCTP_DEBUG_ASCONF1, 397 "process_asconf_delete_ip: deleting "); 398 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 399 break; 400 #endif 401 #ifdef INET6 402 case SCTP_IPV6_ADDRESS: 403 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 404 /* invalid param size */ 405 return (NULL); 406 } 407 v6addr = (struct sctp_ipv6addr_param *)ph; 408 sin6 = (struct sockaddr_in6 *)&sa_store; 409 bzero(sin6, sizeof(*sin6)); 410 sin6->sin6_family = AF_INET6; 411 sin6->sin6_len = sizeof(struct sockaddr_in6); 412 sin6->sin6_port = stcb->rport; 413 memcpy(&sin6->sin6_addr, v6addr->addr, 414 sizeof(struct in6_addr)); 415 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 416 zero_address = 1; 417 SCTPDBG(SCTP_DEBUG_ASCONF1, 418 "process_asconf_delete_ip: deleting "); 419 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 420 break; 421 #endif 422 default: 423 m_reply = sctp_asconf_error_response(aph->correlation_id, 424 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 425 aparam_length); 426 return (m_reply); 427 } 428 429 /* make sure the source address is not being deleted */ 430 if (sctp_cmpaddr(sa, (struct sockaddr *)&sa_source)) { 431 /* trying to delete the source address! */ 432 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 433 m_reply = sctp_asconf_error_response(aph->correlation_id, 434 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, 435 aparam_length); 436 return (m_reply); 437 } 438 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 439 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 440 result = sctp_asconf_del_remote_addrs_except(stcb, 441 (struct sockaddr *)&sa_source); 442 443 if (result) { 444 /* src address did not exist? */ 445 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 446 /* what error to reply with?? */ 447 m_reply = 448 sctp_asconf_error_response(aph->correlation_id, 449 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, 450 aparam_length); 451 } else if (response_required) { 452 m_reply = 453 sctp_asconf_success_response(aph->correlation_id); 454 } 455 return (m_reply); 456 } 457 /* delete the address */ 458 result = sctp_del_remote_addr(stcb, sa); 459 /* 460 * note if result == -2, the address doesn't exist in the asoc but 461 * since it's being deleted anyways, we just ack the delete -- but 462 * this probably means something has already gone awry 463 */ 464 if (result == -1) { 465 /* only one address in the asoc */ 466 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 467 m_reply = sctp_asconf_error_response(aph->correlation_id, 468 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, 469 aparam_length); 470 } else { 471 if (response_required) { 472 m_reply = sctp_asconf_success_response(aph->correlation_id); 473 } 474 /* notify upper layer */ 475 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 476 } 477 return (m_reply); 478 } 479 480 static struct mbuf * 481 sctp_process_asconf_set_primary(struct mbuf *m, 482 struct sctp_asconf_paramhdr *aph, 483 struct sctp_tcb *stcb, int response_required) 484 { 485 struct mbuf *m_reply = NULL; 486 struct sockaddr_storage sa_source, sa_store; 487 struct sctp_paramhdr *ph; 488 uint16_t param_type, param_length, aparam_length; 489 struct sockaddr *sa; 490 int zero_address = 0; 491 492 #ifdef INET 493 struct sockaddr_in *sin; 494 struct sctp_ipv4addr_param *v4addr; 495 496 #endif 497 #ifdef INET6 498 struct sockaddr_in6 *sin6; 499 struct sctp_ipv6addr_param *v6addr; 500 501 #endif 502 503 aparam_length = ntohs(aph->ph.param_length); 504 ph = (struct sctp_paramhdr *)(aph + 1); 505 param_type = ntohs(ph->param_type); 506 param_length = ntohs(ph->param_length); 507 508 sa = (struct sockaddr *)&sa_store; 509 switch (param_type) { 510 #ifdef INET 511 case SCTP_IPV4_ADDRESS: 512 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 513 /* invalid param size */ 514 return (NULL); 515 } 516 v4addr = (struct sctp_ipv4addr_param *)ph; 517 sin = (struct sockaddr_in *)&sa_store; 518 bzero(sin, sizeof(*sin)); 519 sin->sin_family = AF_INET; 520 sin->sin_len = sizeof(struct sockaddr_in); 521 sin->sin_addr.s_addr = v4addr->addr; 522 if (sin->sin_addr.s_addr == INADDR_ANY) 523 zero_address = 1; 524 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 525 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 526 break; 527 #endif 528 #ifdef INET6 529 case SCTP_IPV6_ADDRESS: 530 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 531 /* invalid param size */ 532 return (NULL); 533 } 534 v6addr = (struct sctp_ipv6addr_param *)ph; 535 sin6 = (struct sockaddr_in6 *)&sa_store; 536 bzero(sin6, sizeof(*sin6)); 537 sin6->sin6_family = AF_INET6; 538 sin6->sin6_len = sizeof(struct sockaddr_in6); 539 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 540 sizeof(struct in6_addr)); 541 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 542 zero_address = 1; 543 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 544 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 545 break; 546 #endif 547 default: 548 m_reply = sctp_asconf_error_response(aph->correlation_id, 549 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 550 aparam_length); 551 return (m_reply); 552 } 553 554 /* if 0.0.0.0/::0, use the source address instead */ 555 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 556 sa = (struct sockaddr *)&sa_source; 557 sctp_asconf_get_source_ip(m, sa); 558 SCTPDBG(SCTP_DEBUG_ASCONF1, 559 "process_asconf_set_primary: using source addr "); 560 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 561 } 562 /* set the primary address */ 563 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 564 SCTPDBG(SCTP_DEBUG_ASCONF1, 565 "process_asconf_set_primary: primary address set\n"); 566 /* notify upper layer */ 567 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 568 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 569 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 570 (stcb->asoc.alternate)) { 571 sctp_free_remote_addr(stcb->asoc.alternate); 572 stcb->asoc.alternate = NULL; 573 } 574 if (response_required) { 575 m_reply = sctp_asconf_success_response(aph->correlation_id); 576 } 577 /* 578 * Mobility adaptation. Ideally, when the reception of SET 579 * PRIMARY with DELETE IP ADDRESS of the previous primary 580 * destination, unacknowledged DATA are retransmitted 581 * immediately to the new primary destination for seamless 582 * handover. If the destination is UNCONFIRMED and marked to 583 * REQ_PRIM, The retransmission occur when reception of the 584 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 585 * sctp_input.c) Also, when change of the primary 586 * destination, it is better that all subsequent new DATA 587 * containing already queued DATA are transmitted to the new 588 * primary destination. (by micchie) 589 */ 590 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 591 SCTP_MOBILITY_BASE) || 592 sctp_is_mobility_feature_on(stcb->sctp_ep, 593 SCTP_MOBILITY_FASTHANDOFF)) && 594 sctp_is_mobility_feature_on(stcb->sctp_ep, 595 SCTP_MOBILITY_PRIM_DELETED) && 596 (stcb->asoc.primary_destination->dest_state & 597 SCTP_ADDR_UNCONFIRMED) == 0) { 598 599 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7); 600 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 601 SCTP_MOBILITY_FASTHANDOFF)) { 602 sctp_assoc_immediate_retrans(stcb, 603 stcb->asoc.primary_destination); 604 } 605 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 606 SCTP_MOBILITY_BASE)) { 607 sctp_move_chunks_from_net(stcb, 608 stcb->asoc.deleted_primary); 609 } 610 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 611 stcb->asoc.deleted_primary); 612 } 613 } else { 614 /* couldn't set the requested primary address! */ 615 SCTPDBG(SCTP_DEBUG_ASCONF1, 616 "process_asconf_set_primary: set primary failed!\n"); 617 /* must have been an invalid address, so report */ 618 m_reply = sctp_asconf_error_response(aph->correlation_id, 619 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 620 aparam_length); 621 } 622 623 return (m_reply); 624 } 625 626 /* 627 * handles an ASCONF chunk. 628 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 629 */ 630 void 631 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 632 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 633 int first) 634 { 635 struct sctp_association *asoc; 636 uint32_t serial_num; 637 struct mbuf *n, *m_ack, *m_result, *m_tail; 638 struct sctp_asconf_ack_chunk *ack_cp; 639 struct sctp_asconf_paramhdr *aph, *ack_aph; 640 struct sctp_ipv6addr_param *p_addr; 641 unsigned int asconf_limit, cnt; 642 int error = 0; /* did an error occur? */ 643 644 /* asconf param buffer */ 645 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 646 struct sctp_asconf_ack *ack, *ack_next; 647 648 /* verify minimum length */ 649 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 650 SCTPDBG(SCTP_DEBUG_ASCONF1, 651 "handle_asconf: chunk too small = %xh\n", 652 ntohs(cp->ch.chunk_length)); 653 return; 654 } 655 asoc = &stcb->asoc; 656 serial_num = ntohl(cp->serial_number); 657 658 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 659 /* got a duplicate ASCONF */ 660 SCTPDBG(SCTP_DEBUG_ASCONF1, 661 "handle_asconf: got duplicate serial number = %xh\n", 662 serial_num); 663 return; 664 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 665 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 666 serial_num, asoc->asconf_seq_in + 1); 667 return; 668 } 669 /* it's the expected "next" sequence number, so process it */ 670 asoc->asconf_seq_in = serial_num; /* update sequence */ 671 /* get length of all the param's in the ASCONF */ 672 asconf_limit = offset + ntohs(cp->ch.chunk_length); 673 SCTPDBG(SCTP_DEBUG_ASCONF1, 674 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 675 asconf_limit, serial_num); 676 677 if (first) { 678 /* delete old cache */ 679 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 680 681 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 682 if (ack->serial_number == serial_num) 683 break; 684 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 685 ack->serial_number, serial_num); 686 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 687 if (ack->data != NULL) { 688 sctp_m_freem(ack->data); 689 } 690 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 691 } 692 } 693 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 694 M_DONTWAIT, 1, MT_DATA); 695 if (m_ack == NULL) { 696 SCTPDBG(SCTP_DEBUG_ASCONF1, 697 "handle_asconf: couldn't get mbuf!\n"); 698 return; 699 } 700 m_tail = m_ack; /* current reply chain's tail */ 701 702 /* fill in ASCONF-ACK header */ 703 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 704 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 705 ack_cp->ch.chunk_flags = 0; 706 ack_cp->serial_number = htonl(serial_num); 707 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 708 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 709 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 710 711 /* skip the lookup address parameter */ 712 offset += sizeof(struct sctp_asconf_chunk); 713 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 714 if (p_addr == NULL) { 715 SCTPDBG(SCTP_DEBUG_ASCONF1, 716 "handle_asconf: couldn't get lookup addr!\n"); 717 /* respond with a missing/invalid mandatory parameter error */ 718 return; 719 } 720 /* param_length is already validated in process_control... */ 721 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 722 723 /* get pointer to first asconf param in ASCONF-ACK */ 724 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk)); 725 if (ack_aph == NULL) { 726 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n"); 727 return; 728 } 729 /* get pointer to first asconf param in ASCONF */ 730 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 731 if (aph == NULL) { 732 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 733 goto send_reply; 734 } 735 /* process through all parameters */ 736 cnt = 0; 737 while (aph != NULL) { 738 unsigned int param_length, param_type; 739 740 param_type = ntohs(aph->ph.param_type); 741 param_length = ntohs(aph->ph.param_length); 742 if (offset + param_length > asconf_limit) { 743 /* parameter goes beyond end of chunk! */ 744 sctp_m_freem(m_ack); 745 return; 746 } 747 m_result = NULL; 748 749 if (param_length > sizeof(aparam_buf)) { 750 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 751 sctp_m_freem(m_ack); 752 return; 753 } 754 if (param_length <= sizeof(struct sctp_paramhdr)) { 755 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 756 sctp_m_freem(m_ack); 757 } 758 /* get the entire parameter */ 759 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 760 if (aph == NULL) { 761 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 762 sctp_m_freem(m_ack); 763 return; 764 } 765 switch (param_type) { 766 case SCTP_ADD_IP_ADDRESS: 767 asoc->peer_supports_asconf = 1; 768 m_result = sctp_process_asconf_add_ip(m, aph, stcb, 769 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 770 cnt++; 771 break; 772 case SCTP_DEL_IP_ADDRESS: 773 asoc->peer_supports_asconf = 1; 774 m_result = sctp_process_asconf_delete_ip(m, aph, stcb, 775 error); 776 break; 777 case SCTP_ERROR_CAUSE_IND: 778 /* not valid in an ASCONF chunk */ 779 break; 780 case SCTP_SET_PRIM_ADDR: 781 asoc->peer_supports_asconf = 1; 782 m_result = sctp_process_asconf_set_primary(m, aph, 783 stcb, error); 784 break; 785 case SCTP_NAT_VTAGS: 786 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 787 break; 788 case SCTP_SUCCESS_REPORT: 789 /* not valid in an ASCONF chunk */ 790 break; 791 case SCTP_ULP_ADAPTATION: 792 /* FIX */ 793 break; 794 default: 795 if ((param_type & 0x8000) == 0) { 796 /* Been told to STOP at this param */ 797 asconf_limit = offset; 798 /* 799 * FIX FIX - We need to call 800 * sctp_arethere_unrecognized_parameters() 801 * to get a operr and send it for any 802 * param's with the 0x4000 bit set OR do it 803 * here ourselves... note we still must STOP 804 * if the 0x8000 bit is clear. 805 */ 806 } 807 /* unknown/invalid param type */ 808 break; 809 } /* switch */ 810 811 /* add any (error) result to the reply mbuf chain */ 812 if (m_result != NULL) { 813 SCTP_BUF_NEXT(m_tail) = m_result; 814 m_tail = m_result; 815 /* update lengths, make sure it's aligned too */ 816 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 817 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 818 /* set flag to force success reports */ 819 error = 1; 820 } 821 offset += SCTP_SIZE32(param_length); 822 /* update remaining ASCONF message length to process */ 823 if (offset >= asconf_limit) { 824 /* no more data in the mbuf chain */ 825 break; 826 } 827 /* get pointer to next asconf param */ 828 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 829 sizeof(struct sctp_asconf_paramhdr), 830 (uint8_t *) & aparam_buf); 831 if (aph == NULL) { 832 /* can't get an asconf paramhdr */ 833 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 834 /* FIX ME - add error here... */ 835 } 836 } 837 838 send_reply: 839 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 840 /* save the ASCONF-ACK reply */ 841 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 842 struct sctp_asconf_ack); 843 if (ack == NULL) { 844 sctp_m_freem(m_ack); 845 return; 846 } 847 ack->serial_number = serial_num; 848 ack->last_sent_to = NULL; 849 ack->data = m_ack; 850 ack->len = 0; 851 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 852 ack->len += SCTP_BUF_LEN(n); 853 } 854 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 855 856 /* see if last_control_chunk_from is set properly (use IP src addr) */ 857 if (stcb->asoc.last_control_chunk_from == NULL) { 858 /* 859 * this could happen if the source address was just newly 860 * added 861 */ 862 struct ip *iph; 863 struct sctphdr *sh; 864 struct sockaddr_storage from_store; 865 struct sockaddr *from = (struct sockaddr *)&from_store; 866 867 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 868 /* pullup already done, IP options already stripped */ 869 iph = mtod(m, struct ip *); 870 switch (iph->ip_v) { 871 #ifdef INET 872 case IPVERSION: 873 { 874 struct sockaddr_in *from4; 875 876 sh = (struct sctphdr *)((caddr_t)iph + sizeof(*iph)); 877 from4 = (struct sockaddr_in *)&from_store; 878 bzero(from4, sizeof(*from4)); 879 from4->sin_family = AF_INET; 880 from4->sin_len = sizeof(struct sockaddr_in); 881 from4->sin_addr.s_addr = iph->ip_src.s_addr; 882 from4->sin_port = sh->src_port; 883 break; 884 } 885 #endif 886 #ifdef INET6 887 case IPV6_VERSION >> 4: 888 { 889 struct ip6_hdr *ip6; 890 struct sockaddr_in6 *from6; 891 892 ip6 = mtod(m, struct ip6_hdr *); 893 sh = (struct sctphdr *)((caddr_t)ip6 + sizeof(*ip6)); 894 from6 = (struct sockaddr_in6 *)&from_store; 895 bzero(from6, sizeof(*from6)); 896 from6->sin6_family = AF_INET6; 897 from6->sin6_len = sizeof(struct sockaddr_in6); 898 from6->sin6_addr = ip6->ip6_src; 899 from6->sin6_port = sh->src_port; 900 /* 901 * Get the scopes in properly to the sin6 902 * addr's 903 */ 904 /* we probably don't need these operations */ 905 (void)sa6_recoverscope(from6); 906 sa6_embedscope(from6, 907 MODULE_GLOBAL(ip6_use_defzone)); 908 909 break; 910 } 911 #endif 912 default: 913 /* unknown address type */ 914 from = NULL; 915 } 916 if (from != NULL) { 917 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 918 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, from); 919 /* look up the from address */ 920 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, from); 921 #ifdef SCTP_DEBUG 922 if (stcb->asoc.last_control_chunk_from == NULL) 923 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 924 #endif 925 } 926 } 927 } 928 929 /* 930 * does the address match? returns 0 if not, 1 if so 931 */ 932 static uint32_t 933 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 934 { 935 switch (sa->sa_family) { 936 #ifdef INET6 937 case AF_INET6: 938 { 939 /* XXX scopeid */ 940 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 941 942 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 943 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 944 sizeof(struct in6_addr)) == 0)) { 945 return (1); 946 } 947 break; 948 } 949 #endif 950 #ifdef INET 951 case AF_INET: 952 { 953 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 954 955 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 956 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 957 sizeof(struct in_addr)) == 0)) { 958 return (1); 959 } 960 break; 961 } 962 #endif 963 default: 964 break; 965 } 966 return (0); 967 } 968 969 /* 970 * does the address match? returns 0 if not, 1 if so 971 */ 972 static uint32_t 973 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 974 { 975 uint16_t param_type, param_length; 976 977 param_type = ntohs(ph->param_type); 978 param_length = ntohs(ph->param_length); 979 switch (sa->sa_family) { 980 #ifdef INET6 981 case AF_INET6: 982 { 983 /* XXX scopeid */ 984 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 985 struct sctp_ipv6addr_param *v6addr; 986 987 v6addr = (struct sctp_ipv6addr_param *)ph; 988 if ((param_type == SCTP_IPV6_ADDRESS) && 989 param_length == sizeof(struct sctp_ipv6addr_param) && 990 (memcmp(&v6addr->addr, &sin6->sin6_addr, 991 sizeof(struct in6_addr)) == 0)) { 992 return (1); 993 } 994 break; 995 } 996 #endif 997 #ifdef INET 998 case AF_INET: 999 { 1000 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1001 struct sctp_ipv4addr_param *v4addr; 1002 1003 v4addr = (struct sctp_ipv4addr_param *)ph; 1004 if ((param_type == SCTP_IPV4_ADDRESS) && 1005 param_length == sizeof(struct sctp_ipv4addr_param) && 1006 (memcmp(&v4addr->addr, &sin->sin_addr, 1007 sizeof(struct in_addr)) == 0)) { 1008 return (1); 1009 } 1010 break; 1011 } 1012 #endif 1013 default: 1014 break; 1015 } 1016 return (0); 1017 } 1018 1019 /* 1020 * Cleanup for non-responded/OP ERR'd ASCONF 1021 */ 1022 void 1023 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 1024 { 1025 /* mark peer as ASCONF incapable */ 1026 stcb->asoc.peer_supports_asconf = 0; 1027 /* 1028 * clear out any existing asconfs going out 1029 */ 1030 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1031 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 1032 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 1033 /* remove the old ASCONF on our outbound queue */ 1034 sctp_toss_old_asconf(stcb); 1035 } 1036 1037 /* 1038 * cleanup any cached source addresses that may be topologically 1039 * incorrect after a new address has been added to this interface. 1040 */ 1041 static void 1042 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 1043 { 1044 struct sctp_nets *net; 1045 1046 /* 1047 * Ideally, we want to only clear cached routes and source addresses 1048 * that are topologically incorrect. But since there is no easy way 1049 * to know whether the newly added address on the ifn would cause a 1050 * routing change (i.e. a new egress interface would be chosen) 1051 * without doing a new routing lookup and source address selection, 1052 * we will (for now) just flush any cached route using a different 1053 * ifn (and cached source addrs) and let output re-choose them 1054 * during the next send on that net. 1055 */ 1056 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1057 /* 1058 * clear any cached route (and cached source address) if the 1059 * route's interface is NOT the same as the address change. 1060 * If it's the same interface, just clear the cached source 1061 * address. 1062 */ 1063 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 1064 ((ifn == NULL) || 1065 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 1066 /* clear any cached route */ 1067 RTFREE(net->ro.ro_rt); 1068 net->ro.ro_rt = NULL; 1069 } 1070 /* clear any cached source address */ 1071 if (net->src_addr_selected) { 1072 sctp_free_ifa(net->ro._s_addr); 1073 net->ro._s_addr = NULL; 1074 net->src_addr_selected = 0; 1075 } 1076 } 1077 } 1078 1079 1080 void 1081 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 1082 { 1083 int error; 1084 1085 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 1086 return; 1087 } 1088 if (stcb->asoc.deleted_primary == NULL) { 1089 return; 1090 } 1091 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 1092 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 1093 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1094 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 1095 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 1096 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 1097 stcb->asoc.deleted_primary, 1098 SCTP_FROM_SCTP_TIMER + SCTP_LOC_8); 1099 stcb->asoc.num_send_timers_up--; 1100 if (stcb->asoc.num_send_timers_up < 0) { 1101 stcb->asoc.num_send_timers_up = 0; 1102 } 1103 SCTP_TCB_LOCK_ASSERT(stcb); 1104 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1105 stcb->asoc.deleted_primary); 1106 if (error) { 1107 SCTP_INP_DECR_REF(stcb->sctp_ep); 1108 return; 1109 } 1110 SCTP_TCB_LOCK_ASSERT(stcb); 1111 #ifdef SCTP_AUDITING_ENABLED 1112 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1113 #endif 1114 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1115 if ((stcb->asoc.num_send_timers_up == 0) && 1116 (stcb->asoc.sent_queue_cnt > 0)) { 1117 struct sctp_tmit_chunk *chk; 1118 1119 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1120 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1121 stcb, chk->whoTo); 1122 } 1123 } 1124 return; 1125 } 1126 1127 static int 1128 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1129 1130 void 1131 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1132 { 1133 struct sctp_tmit_chunk *chk; 1134 1135 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1136 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1137 SCTP_FROM_SCTP_TIMER + SCTP_LOC_5); 1138 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1139 net->error_count = 0; 1140 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1141 if (chk->whoTo == net) { 1142 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1143 chk->sent = SCTP_DATAGRAM_RESEND; 1144 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1145 sctp_flight_size_decrease(chk); 1146 sctp_total_flight_decrease(stcb, chk); 1147 net->marked_retrans++; 1148 stcb->asoc.marked_retrans++; 1149 } 1150 } 1151 } 1152 if (net->marked_retrans) { 1153 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1154 } 1155 } 1156 1157 static void 1158 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1159 { 1160 struct sctp_nets *net; 1161 int addrnum, changed; 1162 1163 /* 1164 * If number of local valid addresses is 1, the valid address is 1165 * probably newly added address. Several valid addresses in this 1166 * association. A source address may not be changed. Additionally, 1167 * they can be configured on a same interface as "alias" addresses. 1168 * (by micchie) 1169 */ 1170 addrnum = sctp_local_addr_count(stcb); 1171 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1172 addrnum); 1173 if (addrnum == 1) { 1174 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1175 /* clear any cached route and source address */ 1176 if (net->ro.ro_rt) { 1177 RTFREE(net->ro.ro_rt); 1178 net->ro.ro_rt = NULL; 1179 } 1180 if (net->src_addr_selected) { 1181 sctp_free_ifa(net->ro._s_addr); 1182 net->ro._s_addr = NULL; 1183 net->src_addr_selected = 0; 1184 } 1185 /* Retransmit unacknowledged DATA chunks immediately */ 1186 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1187 SCTP_MOBILITY_FASTHANDOFF)) { 1188 sctp_net_immediate_retrans(stcb, net); 1189 } 1190 /* also, SET PRIMARY is maybe already sent */ 1191 } 1192 return; 1193 } 1194 /* Multiple local addresses exsist in the association. */ 1195 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1196 /* clear any cached route and source address */ 1197 if (net->ro.ro_rt) { 1198 RTFREE(net->ro.ro_rt); 1199 net->ro.ro_rt = NULL; 1200 } 1201 if (net->src_addr_selected) { 1202 sctp_free_ifa(net->ro._s_addr); 1203 net->ro._s_addr = NULL; 1204 net->src_addr_selected = 0; 1205 } 1206 /* 1207 * Check if the nexthop is corresponding to the new address. 1208 * If the new address is corresponding to the current 1209 * nexthop, the path will be changed. If the new address is 1210 * NOT corresponding to the current nexthop, the path will 1211 * not be changed. 1212 */ 1213 SCTP_RTALLOC((sctp_route_t *) & net->ro, 1214 stcb->sctp_ep->def_vrf_id); 1215 if (net->ro.ro_rt == NULL) 1216 continue; 1217 1218 changed = 0; 1219 switch (net->ro._l_addr.sa.sa_family) { 1220 #ifdef INET 1221 case AF_INET: 1222 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) { 1223 changed = 1; 1224 } 1225 break; 1226 #endif 1227 #ifdef INET6 1228 case AF_INET6: 1229 if (sctp_v6src_match_nexthop( 1230 &newifa->address.sin6, (sctp_route_t *) & net->ro)) { 1231 changed = 1; 1232 } 1233 break; 1234 #endif 1235 default: 1236 break; 1237 } 1238 /* 1239 * if the newly added address does not relate routing 1240 * information, we skip. 1241 */ 1242 if (changed == 0) 1243 continue; 1244 /* Retransmit unacknowledged DATA chunks immediately */ 1245 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1246 SCTP_MOBILITY_FASTHANDOFF)) { 1247 sctp_net_immediate_retrans(stcb, net); 1248 } 1249 /* Send SET PRIMARY for this new address */ 1250 if (net == stcb->asoc.primary_destination) { 1251 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1252 SCTP_SET_PRIM_ADDR); 1253 } 1254 } 1255 } 1256 1257 /* 1258 * process an ADD/DELETE IP ack from peer. 1259 * addr: corresponding sctp_ifa to the address being added/deleted. 1260 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1261 * flag: 1=success, 0=failure. 1262 */ 1263 static void 1264 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1265 { 1266 /* 1267 * do the necessary asoc list work- if we get a failure indication, 1268 * leave the address on the assoc's restricted list. If we get a 1269 * success indication, remove the address from the restricted list. 1270 */ 1271 /* 1272 * Note: this will only occur for ADD_IP_ADDRESS, since 1273 * DEL_IP_ADDRESS is never actually added to the list... 1274 */ 1275 if (flag) { 1276 /* success case, so remove from the restricted list */ 1277 sctp_del_local_addr_restricted(stcb, addr); 1278 1279 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1280 SCTP_MOBILITY_BASE) || 1281 sctp_is_mobility_feature_on(stcb->sctp_ep, 1282 SCTP_MOBILITY_FASTHANDOFF)) { 1283 sctp_path_check_and_react(stcb, addr); 1284 return; 1285 } 1286 /* clear any cached/topologically incorrect source addresses */ 1287 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1288 } 1289 /* else, leave it on the list */ 1290 } 1291 1292 /* 1293 * add an asconf add/delete/set primary IP address parameter to the queue. 1294 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1295 * returns 0 if queued, -1 if not queued/removed. 1296 * NOTE: if adding, but a delete for the same address is already scheduled 1297 * (and not yet sent out), simply remove it from queue. Same for deleting 1298 * an address already scheduled for add. If a duplicate operation is found, 1299 * ignore the new one. 1300 */ 1301 static int 1302 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1303 uint16_t type) 1304 { 1305 struct sctp_asconf_addr *aa, *aa_next; 1306 struct sockaddr *sa; 1307 1308 /* make sure the request isn't already in the queue */ 1309 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1310 /* address match? */ 1311 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1312 continue; 1313 /* 1314 * is the request already in queue but not sent? pass the 1315 * request already sent in order to resolve the following 1316 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1317 * can't remove the ADD request already sent 3. arrival of 1318 * ADD 1319 */ 1320 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1321 return (-1); 1322 } 1323 /* is the negative request already in queue, and not sent */ 1324 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1325 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1326 /* add requested, delete already queued */ 1327 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1328 /* remove the ifa from the restricted list */ 1329 sctp_del_local_addr_restricted(stcb, ifa); 1330 /* free the asconf param */ 1331 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1332 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1333 return (-1); 1334 } 1335 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1336 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1337 /* delete requested, add already queued */ 1338 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1339 /* remove the aa->ifa from the restricted list */ 1340 sctp_del_local_addr_restricted(stcb, aa->ifa); 1341 /* free the asconf param */ 1342 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1343 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1344 return (-1); 1345 } 1346 } /* for each aa */ 1347 1348 /* adding new request to the queue */ 1349 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1350 SCTP_M_ASC_ADDR); 1351 if (aa == NULL) { 1352 /* didn't get memory */ 1353 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1354 return (-1); 1355 } 1356 aa->special_del = 0; 1357 /* fill in asconf address parameter fields */ 1358 /* top level elements are "networked" during send */ 1359 aa->ap.aph.ph.param_type = type; 1360 aa->ifa = ifa; 1361 atomic_add_int(&ifa->refcount, 1); 1362 /* correlation_id filled in during send routine later... */ 1363 switch (ifa->address.sa.sa_family) { 1364 #ifdef INET6 1365 case AF_INET6: 1366 { 1367 struct sockaddr_in6 *sin6; 1368 1369 sin6 = (struct sockaddr_in6 *)&ifa->address.sa; 1370 sa = (struct sockaddr *)sin6; 1371 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1372 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1373 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1374 sizeof(struct sctp_ipv6addr_param); 1375 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1376 sizeof(struct in6_addr)); 1377 break; 1378 } 1379 #endif 1380 #ifdef INET 1381 case AF_INET: 1382 { 1383 struct sockaddr_in *sin; 1384 1385 sin = (struct sockaddr_in *)&ifa->address.sa; 1386 sa = (struct sockaddr *)sin; 1387 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1388 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1389 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1390 sizeof(struct sctp_ipv4addr_param); 1391 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1392 sizeof(struct in_addr)); 1393 break; 1394 } 1395 #endif 1396 default: 1397 /* invalid family! */ 1398 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1399 sctp_free_ifa(ifa); 1400 return (-1); 1401 } 1402 aa->sent = 0; /* clear sent flag */ 1403 1404 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1405 #ifdef SCTP_DEBUG 1406 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1407 if (type == SCTP_ADD_IP_ADDRESS) { 1408 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1409 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1410 } else if (type == SCTP_DEL_IP_ADDRESS) { 1411 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1412 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1413 } else { 1414 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1415 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1416 } 1417 } 1418 #endif 1419 1420 return (0); 1421 } 1422 1423 1424 /* 1425 * add an asconf operation for the given ifa and type. 1426 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1427 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1428 * advisable. 1429 */ 1430 static int 1431 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1432 uint16_t type) 1433 { 1434 uint32_t status; 1435 int pending_delete_queued = 0; 1436 1437 /* see if peer supports ASCONF */ 1438 if (stcb->asoc.peer_supports_asconf == 0) { 1439 return (-1); 1440 } 1441 /* 1442 * if this is deleting the last address from the assoc, mark it as 1443 * pending. 1444 */ 1445 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending && 1446 (sctp_local_addr_count(stcb) < 2)) { 1447 /* set the pending delete info only */ 1448 stcb->asoc.asconf_del_pending = 1; 1449 stcb->asoc.asconf_addr_del_pending = ifa; 1450 atomic_add_int(&ifa->refcount, 1); 1451 SCTPDBG(SCTP_DEBUG_ASCONF2, 1452 "asconf_queue_add: mark delete last address pending\n"); 1453 return (-1); 1454 } 1455 /* queue an asconf parameter */ 1456 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1457 1458 /* 1459 * if this is an add, and there is a delete also pending (i.e. the 1460 * last local address is being changed), queue the pending delete 1461 * too. 1462 */ 1463 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1464 /* queue in the pending delete */ 1465 if (sctp_asconf_queue_mgmt(stcb, 1466 stcb->asoc.asconf_addr_del_pending, 1467 SCTP_DEL_IP_ADDRESS) == 0) { 1468 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1469 pending_delete_queued = 1; 1470 /* clear out the pending delete info */ 1471 stcb->asoc.asconf_del_pending = 0; 1472 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1473 stcb->asoc.asconf_addr_del_pending = NULL; 1474 } 1475 } 1476 if (pending_delete_queued) { 1477 struct sctp_nets *net; 1478 1479 /* 1480 * since we know that the only/last address is now being 1481 * changed in this case, reset the cwnd/rto on all nets to 1482 * start as a new address and path. Also clear the error 1483 * counts to give the assoc the best chance to complete the 1484 * address change. 1485 */ 1486 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1487 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1488 net); 1489 net->RTO = 0; 1490 net->error_count = 0; 1491 } 1492 stcb->asoc.overall_error_count = 0; 1493 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1494 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1495 stcb->asoc.overall_error_count, 1496 0, 1497 SCTP_FROM_SCTP_ASCONF, 1498 __LINE__); 1499 } 1500 /* queue in an advisory set primary too */ 1501 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1502 /* let caller know we should send this out immediately */ 1503 status = 1; 1504 } 1505 return (status); 1506 } 1507 1508 /*- 1509 * add an asconf delete IP address parameter to the queue by sockaddr and 1510 * possibly with no sctp_ifa available. This is only called by the routine 1511 * that checks the addresses in an INIT-ACK against the current address list. 1512 * returns 0 if completed, non-zero if not completed. 1513 * NOTE: if an add is already scheduled (and not yet sent out), simply 1514 * remove it from queue. If a duplicate operation is found, ignore the 1515 * new one. 1516 */ 1517 static int 1518 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1519 { 1520 struct sctp_ifa *ifa; 1521 struct sctp_asconf_addr *aa, *aa_next; 1522 uint32_t vrf_id; 1523 1524 if (stcb == NULL) { 1525 return (-1); 1526 } 1527 /* see if peer supports ASCONF */ 1528 if (stcb->asoc.peer_supports_asconf == 0) { 1529 return (-1); 1530 } 1531 /* make sure the request isn't already in the queue */ 1532 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1533 /* address match? */ 1534 if (sctp_asconf_addr_match(aa, sa) == 0) 1535 continue; 1536 /* is the request already in queue (sent or not) */ 1537 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1538 return (-1); 1539 } 1540 /* is the negative request already in queue, and not sent */ 1541 if (aa->sent == 1) 1542 continue; 1543 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1544 /* add already queued, so remove existing entry */ 1545 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1546 sctp_del_local_addr_restricted(stcb, aa->ifa); 1547 /* free the entry */ 1548 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1549 return (-1); 1550 } 1551 } /* for each aa */ 1552 1553 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1554 if (stcb) { 1555 vrf_id = stcb->asoc.vrf_id; 1556 } else { 1557 vrf_id = SCTP_DEFAULT_VRFID; 1558 } 1559 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 1560 1561 /* adding new request to the queue */ 1562 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1563 SCTP_M_ASC_ADDR); 1564 if (aa == NULL) { 1565 /* didn't get memory */ 1566 SCTPDBG(SCTP_DEBUG_ASCONF1, 1567 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1568 return (-1); 1569 } 1570 aa->special_del = 0; 1571 /* fill in asconf address parameter fields */ 1572 /* top level elements are "networked" during send */ 1573 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1574 aa->ifa = ifa; 1575 if (ifa) 1576 atomic_add_int(&ifa->refcount, 1); 1577 /* correlation_id filled in during send routine later... */ 1578 switch (sa->sa_family) { 1579 #ifdef INET6 1580 case AF_INET6: 1581 { 1582 /* IPv6 address */ 1583 struct sockaddr_in6 *sin6; 1584 1585 sin6 = (struct sockaddr_in6 *)sa; 1586 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1587 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1588 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1589 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1590 sizeof(struct in6_addr)); 1591 break; 1592 } 1593 #endif 1594 #ifdef INET 1595 case AF_INET: 1596 { 1597 /* IPv4 address */ 1598 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1599 1600 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1601 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1602 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1603 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1604 sizeof(struct in_addr)); 1605 break; 1606 } 1607 #endif 1608 default: 1609 /* invalid family! */ 1610 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1611 if (ifa) 1612 sctp_free_ifa(ifa); 1613 return (-1); 1614 } 1615 aa->sent = 0; /* clear sent flag */ 1616 1617 /* delete goes to the back of the queue */ 1618 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1619 1620 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1621 return (0); 1622 } 1623 1624 /* 1625 * find a specific asconf param on our "sent" queue 1626 */ 1627 static struct sctp_asconf_addr * 1628 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1629 { 1630 struct sctp_asconf_addr *aa; 1631 1632 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1633 if (aa->ap.aph.correlation_id == correlation_id && 1634 aa->sent == 1) { 1635 /* found it */ 1636 return (aa); 1637 } 1638 } 1639 /* didn't find it */ 1640 return (NULL); 1641 } 1642 1643 /* 1644 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1645 * notifications based on the error response 1646 */ 1647 static void 1648 sctp_asconf_process_error(struct sctp_tcb *stcb, 1649 struct sctp_asconf_paramhdr *aph) 1650 { 1651 struct sctp_error_cause *eh; 1652 struct sctp_paramhdr *ph; 1653 uint16_t param_type; 1654 uint16_t error_code; 1655 1656 eh = (struct sctp_error_cause *)(aph + 1); 1657 ph = (struct sctp_paramhdr *)(eh + 1); 1658 /* validate lengths */ 1659 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1660 htons(aph->ph.param_length)) { 1661 /* invalid error cause length */ 1662 SCTPDBG(SCTP_DEBUG_ASCONF1, 1663 "asconf_process_error: cause element too long\n"); 1664 return; 1665 } 1666 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1667 htons(eh->length)) { 1668 /* invalid included TLV length */ 1669 SCTPDBG(SCTP_DEBUG_ASCONF1, 1670 "asconf_process_error: included TLV too long\n"); 1671 return; 1672 } 1673 /* which error code ? */ 1674 error_code = ntohs(eh->code); 1675 param_type = ntohs(aph->ph.param_type); 1676 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1677 switch (error_code) { 1678 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1679 /* we allow ourselves to "try again" for this error */ 1680 break; 1681 default: 1682 /* peer can't handle it... */ 1683 switch (param_type) { 1684 case SCTP_ADD_IP_ADDRESS: 1685 case SCTP_DEL_IP_ADDRESS: 1686 stcb->asoc.peer_supports_asconf = 0; 1687 break; 1688 case SCTP_SET_PRIM_ADDR: 1689 stcb->asoc.peer_supports_asconf = 0; 1690 break; 1691 default: 1692 break; 1693 } 1694 } 1695 } 1696 1697 /* 1698 * process an asconf queue param. 1699 * aparam: parameter to process, will be removed from the queue. 1700 * flag: 1=success case, 0=failure case 1701 */ 1702 static void 1703 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1704 struct sctp_asconf_addr *aparam, uint32_t flag) 1705 { 1706 uint16_t param_type; 1707 1708 /* process this param */ 1709 param_type = aparam->ap.aph.ph.param_type; 1710 switch (param_type) { 1711 case SCTP_ADD_IP_ADDRESS: 1712 SCTPDBG(SCTP_DEBUG_ASCONF1, 1713 "process_param_ack: added IP address\n"); 1714 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1715 break; 1716 case SCTP_DEL_IP_ADDRESS: 1717 SCTPDBG(SCTP_DEBUG_ASCONF1, 1718 "process_param_ack: deleted IP address\n"); 1719 /* nothing really to do... lists already updated */ 1720 break; 1721 case SCTP_SET_PRIM_ADDR: 1722 SCTPDBG(SCTP_DEBUG_ASCONF1, 1723 "process_param_ack: set primary IP address\n"); 1724 /* nothing to do... peer may start using this addr */ 1725 if (flag == 0) 1726 stcb->asoc.peer_supports_asconf = 0; 1727 break; 1728 default: 1729 /* should NEVER happen */ 1730 break; 1731 } 1732 1733 /* remove the param and free it */ 1734 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1735 if (aparam->ifa) 1736 sctp_free_ifa(aparam->ifa); 1737 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1738 } 1739 1740 /* 1741 * cleanup from a bad asconf ack parameter 1742 */ 1743 static void 1744 sctp_asconf_ack_clear(struct sctp_tcb *stcb) 1745 { 1746 /* assume peer doesn't really know how to do asconfs */ 1747 stcb->asoc.peer_supports_asconf = 0; 1748 /* XXX we could free the pending queue here */ 1749 } 1750 1751 void 1752 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1753 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1754 struct sctp_nets *net, int *abort_no_unlock) 1755 { 1756 struct sctp_association *asoc; 1757 uint32_t serial_num; 1758 uint16_t ack_length; 1759 struct sctp_asconf_paramhdr *aph; 1760 struct sctp_asconf_addr *aa, *aa_next; 1761 uint32_t last_error_id = 0; /* last error correlation id */ 1762 uint32_t id; 1763 struct sctp_asconf_addr *ap; 1764 1765 /* asconf param buffer */ 1766 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1767 1768 /* verify minimum length */ 1769 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1770 SCTPDBG(SCTP_DEBUG_ASCONF1, 1771 "handle_asconf_ack: chunk too small = %xh\n", 1772 ntohs(cp->ch.chunk_length)); 1773 return; 1774 } 1775 asoc = &stcb->asoc; 1776 serial_num = ntohl(cp->serial_number); 1777 1778 /* 1779 * NOTE: we may want to handle this differently- currently, we will 1780 * abort when we get an ack for the expected serial number + 1 (eg. 1781 * we didn't send it), process an ack normally if it is the expected 1782 * serial number, and re-send the previous ack for *ALL* other 1783 * serial numbers 1784 */ 1785 1786 /* 1787 * if the serial number is the next expected, but I didn't send it, 1788 * abort the asoc, since someone probably just hijacked us... 1789 */ 1790 if (serial_num == (asoc->asconf_seq_out + 1)) { 1791 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1792 sctp_abort_an_association(stcb->sctp_ep, stcb, 1793 SCTP_CAUSE_ILLEGAL_ASCONF_ACK, NULL, SCTP_SO_NOT_LOCKED); 1794 *abort_no_unlock = 1; 1795 return; 1796 } 1797 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1798 /* got a duplicate/unexpected ASCONF-ACK */ 1799 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1800 serial_num, asoc->asconf_seq_out_acked + 1); 1801 return; 1802 } 1803 if (serial_num == asoc->asconf_seq_out - 1) { 1804 /* stop our timer */ 1805 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1806 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1807 } 1808 /* process the ASCONF-ACK contents */ 1809 ack_length = ntohs(cp->ch.chunk_length) - 1810 sizeof(struct sctp_asconf_ack_chunk); 1811 offset += sizeof(struct sctp_asconf_ack_chunk); 1812 /* process through all parameters */ 1813 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1814 unsigned int param_length, param_type; 1815 1816 /* get pointer to next asconf parameter */ 1817 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1818 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1819 if (aph == NULL) { 1820 /* can't get an asconf paramhdr */ 1821 sctp_asconf_ack_clear(stcb); 1822 return; 1823 } 1824 param_type = ntohs(aph->ph.param_type); 1825 param_length = ntohs(aph->ph.param_length); 1826 if (param_length > ack_length) { 1827 sctp_asconf_ack_clear(stcb); 1828 return; 1829 } 1830 if (param_length < sizeof(struct sctp_paramhdr)) { 1831 sctp_asconf_ack_clear(stcb); 1832 return; 1833 } 1834 /* get the complete parameter... */ 1835 if (param_length > sizeof(aparam_buf)) { 1836 SCTPDBG(SCTP_DEBUG_ASCONF1, 1837 "param length (%u) larger than buffer size!\n", param_length); 1838 sctp_asconf_ack_clear(stcb); 1839 return; 1840 } 1841 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1842 if (aph == NULL) { 1843 sctp_asconf_ack_clear(stcb); 1844 return; 1845 } 1846 /* correlation_id is transparent to peer, no ntohl needed */ 1847 id = aph->correlation_id; 1848 1849 switch (param_type) { 1850 case SCTP_ERROR_CAUSE_IND: 1851 last_error_id = id; 1852 /* find the corresponding asconf param in our queue */ 1853 ap = sctp_asconf_find_param(stcb, id); 1854 if (ap == NULL) { 1855 /* hmm... can't find this in our queue! */ 1856 break; 1857 } 1858 /* process the parameter, failed flag */ 1859 sctp_asconf_process_param_ack(stcb, ap, 0); 1860 /* process the error response */ 1861 sctp_asconf_process_error(stcb, aph); 1862 break; 1863 case SCTP_SUCCESS_REPORT: 1864 /* find the corresponding asconf param in our queue */ 1865 ap = sctp_asconf_find_param(stcb, id); 1866 if (ap == NULL) { 1867 /* hmm... can't find this in our queue! */ 1868 break; 1869 } 1870 /* process the parameter, success flag */ 1871 sctp_asconf_process_param_ack(stcb, ap, 1); 1872 break; 1873 default: 1874 break; 1875 } /* switch */ 1876 1877 /* update remaining ASCONF-ACK message length to process */ 1878 ack_length -= SCTP_SIZE32(param_length); 1879 if (ack_length <= 0) { 1880 /* no more data in the mbuf chain */ 1881 break; 1882 } 1883 offset += SCTP_SIZE32(param_length); 1884 } /* while */ 1885 1886 /* 1887 * if there are any "sent" params still on the queue, these are 1888 * implicitly "success", or "failed" (if we got an error back) ... 1889 * so process these appropriately 1890 * 1891 * we assume that the correlation_id's are monotonically increasing 1892 * beginning from 1 and that we don't have *that* many outstanding 1893 * at any given time 1894 */ 1895 if (last_error_id == 0) 1896 last_error_id--;/* set to "max" value */ 1897 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1898 if (aa->sent == 1) { 1899 /* 1900 * implicitly successful or failed if correlation_id 1901 * < last_error_id, then success else, failure 1902 */ 1903 if (aa->ap.aph.correlation_id < last_error_id) 1904 sctp_asconf_process_param_ack(stcb, aa, 1); 1905 else 1906 sctp_asconf_process_param_ack(stcb, aa, 0); 1907 } else { 1908 /* 1909 * since we always process in order (FIFO queue) if 1910 * we reach one that hasn't been sent, the rest 1911 * should not have been sent either. so, we're 1912 * done... 1913 */ 1914 break; 1915 } 1916 } 1917 1918 /* update the next sequence number to use */ 1919 asoc->asconf_seq_out_acked++; 1920 /* remove the old ASCONF on our outbound queue */ 1921 sctp_toss_old_asconf(stcb); 1922 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1923 #ifdef SCTP_TIMER_BASED_ASCONF 1924 /* we have more params, so restart our timer */ 1925 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1926 stcb, net); 1927 #else 1928 /* we have more params, so send out more */ 1929 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1930 #endif 1931 } 1932 } 1933 1934 #ifdef INET6 1935 static uint32_t 1936 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1937 { 1938 struct sockaddr_in6 *sin6, *net6; 1939 struct sctp_nets *net; 1940 1941 if (sa->sa_family != AF_INET6) { 1942 /* wrong family */ 1943 return (0); 1944 } 1945 sin6 = (struct sockaddr_in6 *)sa; 1946 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1947 /* not link local address */ 1948 return (0); 1949 } 1950 /* hunt through our destination nets list for this scope_id */ 1951 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1952 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1953 AF_INET6) 1954 continue; 1955 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1956 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1957 continue; 1958 if (sctp_is_same_scope(sin6, net6)) { 1959 /* found one */ 1960 return (1); 1961 } 1962 } 1963 /* didn't find one */ 1964 return (0); 1965 } 1966 1967 #endif 1968 1969 /* 1970 * address management functions 1971 */ 1972 static void 1973 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1974 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1975 { 1976 int status; 1977 1978 1979 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1980 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1981 /* subset bound, no ASCONF allowed case, so ignore */ 1982 return; 1983 } 1984 /* 1985 * note: we know this is not the subset bound, no ASCONF case eg. 1986 * this is boundall or subset bound w/ASCONF allowed 1987 */ 1988 1989 /* first, make sure it's a good address family */ 1990 switch (ifa->address.sa.sa_family) { 1991 #ifdef INET6 1992 case AF_INET6: 1993 break; 1994 #endif 1995 #ifdef INET 1996 case AF_INET: 1997 break; 1998 #endif 1999 default: 2000 return; 2001 } 2002 #ifdef INET6 2003 /* make sure we're "allowed" to add this type of addr */ 2004 if (ifa->address.sa.sa_family == AF_INET6) { 2005 /* invalid if we're not a v6 endpoint */ 2006 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 2007 return; 2008 /* is the v6 addr really valid ? */ 2009 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2010 return; 2011 } 2012 } 2013 #endif 2014 /* put this address on the "pending/do not use yet" list */ 2015 sctp_add_local_addr_restricted(stcb, ifa); 2016 /* 2017 * check address scope if address is out of scope, don't queue 2018 * anything... note: this would leave the address on both inp and 2019 * asoc lists 2020 */ 2021 switch (ifa->address.sa.sa_family) { 2022 #ifdef INET6 2023 case AF_INET6: 2024 { 2025 struct sockaddr_in6 *sin6; 2026 2027 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 2028 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2029 /* we skip unspecifed addresses */ 2030 return; 2031 } 2032 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2033 if (stcb->asoc.local_scope == 0) { 2034 return; 2035 } 2036 /* is it the right link local scope? */ 2037 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2038 return; 2039 } 2040 } 2041 if (stcb->asoc.site_scope == 0 && 2042 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 2043 return; 2044 } 2045 break; 2046 } 2047 #endif 2048 #ifdef INET 2049 case AF_INET: 2050 { 2051 struct sockaddr_in *sin; 2052 struct in6pcb *inp6; 2053 2054 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2055 /* invalid if we are a v6 only endpoint */ 2056 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2057 SCTP_IPV6_V6ONLY(inp6)) 2058 return; 2059 2060 sin = (struct sockaddr_in *)&ifa->address.sa; 2061 if (sin->sin_addr.s_addr == 0) { 2062 /* we skip unspecifed addresses */ 2063 return; 2064 } 2065 if (stcb->asoc.ipv4_local_scope == 0 && 2066 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2067 return; 2068 } 2069 break; 2070 } 2071 #endif 2072 default: 2073 /* else, not AF_INET or AF_INET6, so skip */ 2074 return; 2075 } 2076 2077 /* queue an asconf for this address add/delete */ 2078 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 2079 /* does the peer do asconf? */ 2080 if (stcb->asoc.peer_supports_asconf) { 2081 /* queue an asconf for this addr */ 2082 status = sctp_asconf_queue_add(stcb, ifa, type); 2083 2084 /* 2085 * if queued ok, and in the open state, send out the 2086 * ASCONF. If in the non-open state, these will be 2087 * sent when the state goes open. 2088 */ 2089 if (status == 0 && 2090 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2091 #ifdef SCTP_TIMER_BASED_ASCONF 2092 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 2093 stcb, stcb->asoc.primary_destination); 2094 #else 2095 sctp_send_asconf(stcb, NULL, addr_locked); 2096 #endif 2097 } 2098 } 2099 } 2100 } 2101 2102 2103 int 2104 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2105 { 2106 struct sctp_asconf_iterator *asc; 2107 struct sctp_ifa *ifa; 2108 struct sctp_laddr *l; 2109 int cnt_invalid = 0; 2110 2111 asc = (struct sctp_asconf_iterator *)ptr; 2112 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2113 ifa = l->ifa; 2114 switch (ifa->address.sa.sa_family) { 2115 #ifdef INET6 2116 case AF_INET6: 2117 /* invalid if we're not a v6 endpoint */ 2118 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2119 cnt_invalid++; 2120 if (asc->cnt == cnt_invalid) 2121 return (1); 2122 } 2123 break; 2124 #endif 2125 #ifdef INET 2126 case AF_INET: 2127 { 2128 /* invalid if we are a v6 only endpoint */ 2129 struct in6pcb *inp6; 2130 2131 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2132 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2133 SCTP_IPV6_V6ONLY(inp6)) { 2134 cnt_invalid++; 2135 if (asc->cnt == cnt_invalid) 2136 return (1); 2137 } 2138 break; 2139 } 2140 #endif 2141 default: 2142 /* invalid address family */ 2143 cnt_invalid++; 2144 if (asc->cnt == cnt_invalid) 2145 return (1); 2146 } 2147 } 2148 return (0); 2149 } 2150 2151 static int 2152 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2153 { 2154 struct sctp_ifa *ifa; 2155 struct sctp_asconf_iterator *asc; 2156 struct sctp_laddr *laddr, *nladdr, *l; 2157 2158 /* Only for specific case not bound all */ 2159 asc = (struct sctp_asconf_iterator *)ptr; 2160 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2161 ifa = l->ifa; 2162 if (l->action == SCTP_ADD_IP_ADDRESS) { 2163 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2164 sctp_nxt_addr) { 2165 if (laddr->ifa == ifa) { 2166 laddr->action = 0; 2167 break; 2168 } 2169 } 2170 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2171 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2172 /* remove only after all guys are done */ 2173 if (laddr->ifa == ifa) { 2174 sctp_del_local_addr_ep(inp, ifa); 2175 } 2176 } 2177 } 2178 } 2179 return (0); 2180 } 2181 2182 void 2183 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2184 void *ptr, uint32_t val SCTP_UNUSED) 2185 { 2186 struct sctp_asconf_iterator *asc; 2187 struct sctp_ifa *ifa; 2188 struct sctp_laddr *l; 2189 int cnt_invalid = 0; 2190 int type, status; 2191 int num_queued = 0; 2192 2193 asc = (struct sctp_asconf_iterator *)ptr; 2194 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2195 ifa = l->ifa; 2196 type = l->action; 2197 2198 /* address's vrf_id must be the vrf_id of the assoc */ 2199 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2200 continue; 2201 } 2202 /* Same checks again for assoc */ 2203 switch (ifa->address.sa.sa_family) { 2204 #ifdef INET6 2205 case AF_INET6: 2206 { 2207 /* invalid if we're not a v6 endpoint */ 2208 struct sockaddr_in6 *sin6; 2209 2210 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2211 cnt_invalid++; 2212 if (asc->cnt == cnt_invalid) 2213 return; 2214 else 2215 continue; 2216 } 2217 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 2218 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2219 /* we skip unspecifed addresses */ 2220 continue; 2221 } 2222 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2223 if (stcb->asoc.local_scope == 0) { 2224 continue; 2225 } 2226 /* is it the right link local scope? */ 2227 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2228 continue; 2229 } 2230 } 2231 break; 2232 } 2233 #endif 2234 #ifdef INET 2235 case AF_INET: 2236 { 2237 /* invalid if we are a v6 only endpoint */ 2238 struct in6pcb *inp6; 2239 struct sockaddr_in *sin; 2240 2241 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2242 /* invalid if we are a v6 only endpoint */ 2243 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2244 SCTP_IPV6_V6ONLY(inp6)) 2245 continue; 2246 2247 sin = (struct sockaddr_in *)&ifa->address.sa; 2248 if (sin->sin_addr.s_addr == 0) { 2249 /* we skip unspecifed addresses */ 2250 continue; 2251 } 2252 if (stcb->asoc.ipv4_local_scope == 0 && 2253 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2254 continue; 2255 } 2256 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2257 SCTP_IPV6_V6ONLY(inp6)) { 2258 cnt_invalid++; 2259 if (asc->cnt == cnt_invalid) 2260 return; 2261 else 2262 continue; 2263 } 2264 break; 2265 } 2266 #endif 2267 default: 2268 /* invalid address family */ 2269 cnt_invalid++; 2270 if (asc->cnt == cnt_invalid) 2271 return; 2272 else 2273 continue; 2274 break; 2275 } 2276 2277 if (type == SCTP_ADD_IP_ADDRESS) { 2278 /* prevent this address from being used as a source */ 2279 sctp_add_local_addr_restricted(stcb, ifa); 2280 } else if (type == SCTP_DEL_IP_ADDRESS) { 2281 struct sctp_nets *net; 2282 2283 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2284 sctp_rtentry_t *rt; 2285 2286 /* delete this address if cached */ 2287 if (net->ro._s_addr == ifa) { 2288 sctp_free_ifa(net->ro._s_addr); 2289 net->ro._s_addr = NULL; 2290 net->src_addr_selected = 0; 2291 rt = net->ro.ro_rt; 2292 if (rt) { 2293 RTFREE(rt); 2294 net->ro.ro_rt = NULL; 2295 } 2296 /* 2297 * Now we deleted our src address, 2298 * should we not also now reset the 2299 * cwnd/rto to start as if its a new 2300 * address? 2301 */ 2302 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2303 net->RTO = 0; 2304 2305 } 2306 } 2307 } else if (type == SCTP_SET_PRIM_ADDR) { 2308 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2309 /* must validate the ifa is in the ep */ 2310 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2311 continue; 2312 } 2313 } else { 2314 /* Need to check scopes for this guy */ 2315 if (sctp_is_address_in_scope(ifa, 2316 stcb->asoc.ipv4_addr_legal, 2317 stcb->asoc.ipv6_addr_legal, 2318 stcb->asoc.loopback_scope, 2319 stcb->asoc.ipv4_local_scope, 2320 stcb->asoc.local_scope, 2321 stcb->asoc.site_scope, 0) == 0) { 2322 continue; 2323 } 2324 } 2325 } 2326 /* queue an asconf for this address add/delete */ 2327 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2328 stcb->asoc.peer_supports_asconf) { 2329 /* queue an asconf for this addr */ 2330 status = sctp_asconf_queue_add(stcb, ifa, type); 2331 /* 2332 * if queued ok, and in the open state, update the 2333 * count of queued params. If in the non-open 2334 * state, these get sent when the assoc goes open. 2335 */ 2336 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2337 if (status >= 0) { 2338 num_queued++; 2339 } 2340 } 2341 } 2342 } 2343 /* 2344 * If we have queued params in the open state, send out an ASCONF. 2345 */ 2346 if (num_queued > 0) { 2347 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2348 } 2349 } 2350 2351 void 2352 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2353 { 2354 struct sctp_asconf_iterator *asc; 2355 struct sctp_ifa *ifa; 2356 struct sctp_laddr *l, *nl; 2357 2358 asc = (struct sctp_asconf_iterator *)ptr; 2359 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2360 ifa = l->ifa; 2361 if (l->action == SCTP_ADD_IP_ADDRESS) { 2362 /* Clear the defer use flag */ 2363 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2364 } 2365 sctp_free_ifa(ifa); 2366 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2367 SCTP_DECR_LADDR_COUNT(); 2368 } 2369 SCTP_FREE(asc, SCTP_M_ASC_IT); 2370 } 2371 2372 /* 2373 * sa is the sockaddr to ask the peer to set primary to. 2374 * returns: 0 = completed, -1 = error 2375 */ 2376 int32_t 2377 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2378 { 2379 uint32_t vrf_id; 2380 struct sctp_ifa *ifa; 2381 2382 /* find the ifa for the desired set primary */ 2383 vrf_id = stcb->asoc.vrf_id; 2384 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2385 if (ifa == NULL) { 2386 /* Invalid address */ 2387 return (-1); 2388 } 2389 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2390 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2391 /* set primary queuing succeeded */ 2392 SCTPDBG(SCTP_DEBUG_ASCONF1, 2393 "set_primary_ip_address_sa: queued on tcb=%p, ", 2394 stcb); 2395 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2396 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2397 #ifdef SCTP_TIMER_BASED_ASCONF 2398 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2399 stcb->sctp_ep, stcb, 2400 stcb->asoc.primary_destination); 2401 #else 2402 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2403 #endif 2404 } 2405 } else { 2406 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2407 stcb); 2408 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2409 return (-1); 2410 } 2411 return (0); 2412 } 2413 2414 void 2415 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2416 { 2417 struct sctp_inpcb *inp; 2418 2419 /* go through all our PCB's */ 2420 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2421 struct sctp_tcb *stcb; 2422 2423 /* process for all associations for this endpoint */ 2424 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2425 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2426 if (!sctp_asconf_queue_add(stcb, ifa, 2427 SCTP_SET_PRIM_ADDR)) { 2428 /* set primary queuing succeeded */ 2429 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2430 stcb); 2431 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2432 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2433 #ifdef SCTP_TIMER_BASED_ASCONF 2434 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2435 stcb->sctp_ep, stcb, 2436 stcb->asoc.primary_destination); 2437 #else 2438 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2439 #endif 2440 } 2441 } 2442 } /* for each stcb */ 2443 } /* for each inp */ 2444 } 2445 2446 int 2447 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2448 { 2449 struct sctp_tmit_chunk *chk, *nchk; 2450 unsigned int offset, asconf_limit; 2451 struct sctp_asconf_chunk *acp; 2452 struct sctp_asconf_paramhdr *aph; 2453 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2454 struct sctp_paramhdr *ph; 2455 int add_cnt, del_cnt; 2456 uint16_t last_param_type; 2457 2458 add_cnt = del_cnt = 0; 2459 last_param_type = 0; 2460 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2461 if (chk->data == NULL) { 2462 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2463 continue; 2464 } 2465 offset = 0; 2466 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2467 offset += sizeof(struct sctp_asconf_chunk); 2468 asconf_limit = ntohs(acp->ch.chunk_length); 2469 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2470 if (ph == NULL) { 2471 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2472 continue; 2473 } 2474 offset += ntohs(ph->param_length); 2475 2476 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2477 if (aph == NULL) { 2478 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2479 continue; 2480 } 2481 while (aph != NULL) { 2482 unsigned int param_length, param_type; 2483 2484 param_type = ntohs(aph->ph.param_type); 2485 param_length = ntohs(aph->ph.param_length); 2486 if (offset + param_length > asconf_limit) { 2487 /* parameter goes beyond end of chunk! */ 2488 break; 2489 } 2490 if (param_length > sizeof(aparam_buf)) { 2491 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2492 break; 2493 } 2494 if (param_length <= sizeof(struct sctp_paramhdr)) { 2495 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2496 break; 2497 } 2498 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2499 if (aph == NULL) { 2500 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2501 break; 2502 } 2503 ph = (struct sctp_paramhdr *)(aph + 1); 2504 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2505 switch (param_type) { 2506 case SCTP_ADD_IP_ADDRESS: 2507 add_cnt++; 2508 break; 2509 case SCTP_DEL_IP_ADDRESS: 2510 del_cnt++; 2511 break; 2512 default: 2513 break; 2514 } 2515 last_param_type = param_type; 2516 } 2517 offset += SCTP_SIZE32(param_length); 2518 if (offset >= asconf_limit) { 2519 /* no more data in the mbuf chain */ 2520 break; 2521 } 2522 /* get pointer to next asconf param */ 2523 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2524 } 2525 } 2526 2527 /* 2528 * we want to find the sequences which consist of ADD -> DEL -> ADD 2529 * or DEL -> ADD 2530 */ 2531 if (add_cnt > del_cnt || 2532 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2533 return (1); 2534 } 2535 return (0); 2536 } 2537 2538 static struct sockaddr * 2539 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2540 { 2541 struct sctp_vrf *vrf = NULL; 2542 struct sctp_ifn *sctp_ifn; 2543 struct sctp_ifa *sctp_ifa; 2544 2545 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2546 SCTP_IPI_ADDR_RLOCK(); 2547 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2548 if (vrf == NULL) { 2549 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2550 SCTP_IPI_ADDR_RUNLOCK(); 2551 return (NULL); 2552 } 2553 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2554 if (stcb->asoc.loopback_scope == 0 && 2555 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2556 /* Skip if loopback_scope not set */ 2557 continue; 2558 } 2559 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2560 switch (sctp_ifa->address.sa.sa_family) { 2561 #ifdef INET 2562 case AF_INET: 2563 if (stcb->asoc.ipv4_addr_legal) { 2564 struct sockaddr_in *sin; 2565 2566 sin = (struct sockaddr_in *)&sctp_ifa->address.sa; 2567 if (sin->sin_addr.s_addr == 0) { 2568 /* skip unspecifed addresses */ 2569 continue; 2570 } 2571 if (stcb->asoc.ipv4_local_scope == 0 && 2572 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2573 continue; 2574 2575 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2576 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2577 continue; 2578 /* 2579 * found a valid local v4 address to 2580 * use 2581 */ 2582 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2583 SCTP_IPI_ADDR_RUNLOCK(); 2584 return (&sctp_ifa->address.sa); 2585 } 2586 break; 2587 #endif 2588 #ifdef INET6 2589 case AF_INET6: 2590 if (stcb->asoc.ipv6_addr_legal) { 2591 struct sockaddr_in6 *sin6; 2592 2593 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2594 continue; 2595 } 2596 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa; 2597 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2598 /* 2599 * we skip unspecifed 2600 * addresses 2601 */ 2602 continue; 2603 } 2604 if (stcb->asoc.local_scope == 0 && 2605 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2606 continue; 2607 if (stcb->asoc.site_scope == 0 && 2608 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2609 continue; 2610 2611 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2612 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2613 continue; 2614 /* 2615 * found a valid local v6 address to 2616 * use 2617 */ 2618 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2619 SCTP_IPI_ADDR_RUNLOCK(); 2620 return (&sctp_ifa->address.sa); 2621 } 2622 break; 2623 #endif 2624 default: 2625 break; 2626 } 2627 } 2628 } 2629 /* no valid addresses found */ 2630 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2631 SCTP_IPI_ADDR_RUNLOCK(); 2632 return (NULL); 2633 } 2634 2635 static struct sockaddr * 2636 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2637 { 2638 struct sctp_laddr *laddr; 2639 2640 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2641 if (laddr->ifa == NULL) { 2642 continue; 2643 } 2644 /* is the address restricted ? */ 2645 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2646 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2647 continue; 2648 2649 /* found a valid local address to use */ 2650 return (&laddr->ifa->address.sa); 2651 } 2652 /* no valid addresses found */ 2653 return (NULL); 2654 } 2655 2656 /* 2657 * builds an ASCONF chunk from queued ASCONF params. 2658 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2659 */ 2660 struct mbuf * 2661 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2662 { 2663 struct mbuf *m_asconf, *m_asconf_chk; 2664 struct sctp_asconf_addr *aa; 2665 struct sctp_asconf_chunk *acp; 2666 struct sctp_asconf_paramhdr *aph; 2667 struct sctp_asconf_addr_param *aap; 2668 uint32_t p_length; 2669 uint32_t correlation_id = 1; /* 0 is reserved... */ 2670 caddr_t ptr, lookup_ptr; 2671 uint8_t lookup_used = 0; 2672 2673 /* are there any asconf params to send? */ 2674 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2675 if (aa->sent == 0) 2676 break; 2677 } 2678 if (aa == NULL) 2679 return (NULL); 2680 2681 /* 2682 * get a chunk header mbuf and a cluster for the asconf params since 2683 * it's simpler to fill in the asconf chunk header lookup address on 2684 * the fly 2685 */ 2686 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA); 2687 if (m_asconf_chk == NULL) { 2688 /* no mbuf's */ 2689 SCTPDBG(SCTP_DEBUG_ASCONF1, 2690 "compose_asconf: couldn't get chunk mbuf!\n"); 2691 return (NULL); 2692 } 2693 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 2694 if (m_asconf == NULL) { 2695 /* no mbuf's */ 2696 SCTPDBG(SCTP_DEBUG_ASCONF1, 2697 "compose_asconf: couldn't get mbuf!\n"); 2698 sctp_m_freem(m_asconf_chk); 2699 return (NULL); 2700 } 2701 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2702 SCTP_BUF_LEN(m_asconf) = 0; 2703 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2704 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2705 /* save pointers to lookup address and asconf params */ 2706 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2707 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2708 2709 /* fill in chunk header info */ 2710 acp->ch.chunk_type = SCTP_ASCONF; 2711 acp->ch.chunk_flags = 0; 2712 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2713 stcb->asoc.asconf_seq_out++; 2714 2715 /* add parameters... up to smallest MTU allowed */ 2716 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2717 if (aa->sent) 2718 continue; 2719 /* get the parameter length */ 2720 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2721 /* will it fit in current chunk? */ 2722 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) { 2723 /* won't fit, so we're done with this chunk */ 2724 break; 2725 } 2726 /* assign (and store) a correlation id */ 2727 aa->ap.aph.correlation_id = correlation_id++; 2728 2729 /* 2730 * fill in address if we're doing a delete this is a simple 2731 * way for us to fill in the correlation address, which 2732 * should only be used by the peer if we're deleting our 2733 * source address and adding a new address (e.g. renumbering 2734 * case) 2735 */ 2736 if (lookup_used == 0 && 2737 (aa->special_del == 0) && 2738 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2739 struct sctp_ipv6addr_param *lookup; 2740 uint16_t p_size, addr_size; 2741 2742 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2743 lookup->ph.param_type = 2744 htons(aa->ap.addrp.ph.param_type); 2745 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2746 /* copy IPv6 address */ 2747 p_size = sizeof(struct sctp_ipv6addr_param); 2748 addr_size = sizeof(struct in6_addr); 2749 } else { 2750 /* copy IPv4 address */ 2751 p_size = sizeof(struct sctp_ipv4addr_param); 2752 addr_size = sizeof(struct in_addr); 2753 } 2754 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2755 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2756 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2757 lookup_used = 1; 2758 } 2759 /* copy into current space */ 2760 memcpy(ptr, &aa->ap, p_length); 2761 2762 /* network elements and update lengths */ 2763 aph = (struct sctp_asconf_paramhdr *)ptr; 2764 aap = (struct sctp_asconf_addr_param *)ptr; 2765 /* correlation_id is transparent to peer, no htonl needed */ 2766 aph->ph.param_type = htons(aph->ph.param_type); 2767 aph->ph.param_length = htons(aph->ph.param_length); 2768 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2769 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2770 2771 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2772 ptr += SCTP_SIZE32(p_length); 2773 2774 /* 2775 * these params are removed off the pending list upon 2776 * getting an ASCONF-ACK back from the peer, just set flag 2777 */ 2778 aa->sent = 1; 2779 } 2780 /* check to see if the lookup addr has been populated yet */ 2781 if (lookup_used == 0) { 2782 /* NOTE: if the address param is optional, can skip this... */ 2783 /* add any valid (existing) address... */ 2784 struct sctp_ipv6addr_param *lookup; 2785 uint16_t p_size, addr_size; 2786 struct sockaddr *found_addr; 2787 caddr_t addr_ptr; 2788 2789 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2790 found_addr = sctp_find_valid_localaddr(stcb, 2791 addr_locked); 2792 else 2793 found_addr = sctp_find_valid_localaddr_ep(stcb); 2794 2795 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2796 if (found_addr != NULL) { 2797 switch (found_addr->sa_family) { 2798 #ifdef INET6 2799 case AF_INET6: 2800 /* copy IPv6 address */ 2801 lookup->ph.param_type = 2802 htons(SCTP_IPV6_ADDRESS); 2803 p_size = sizeof(struct sctp_ipv6addr_param); 2804 addr_size = sizeof(struct in6_addr); 2805 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2806 found_addr)->sin6_addr; 2807 break; 2808 #endif 2809 #ifdef INET 2810 case AF_INET: 2811 /* copy IPv4 address */ 2812 lookup->ph.param_type = 2813 htons(SCTP_IPV4_ADDRESS); 2814 p_size = sizeof(struct sctp_ipv4addr_param); 2815 addr_size = sizeof(struct in_addr); 2816 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2817 found_addr)->sin_addr; 2818 break; 2819 #endif 2820 default: 2821 p_size = 0; 2822 addr_size = 0; 2823 addr_ptr = NULL; 2824 break; 2825 } 2826 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2827 memcpy(lookup->addr, addr_ptr, addr_size); 2828 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2829 } else { 2830 /* uh oh... don't have any address?? */ 2831 SCTPDBG(SCTP_DEBUG_ASCONF1, 2832 "compose_asconf: no lookup addr!\n"); 2833 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2834 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2835 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2836 bzero(lookup->addr, sizeof(struct in_addr)); 2837 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2838 } 2839 } 2840 /* chain it all together */ 2841 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2842 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2843 acp->ch.chunk_length = ntohs(*retlen); 2844 2845 return (m_asconf_chk); 2846 } 2847 2848 /* 2849 * section to handle address changes before an association is up eg. changes 2850 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2851 */ 2852 2853 /* 2854 * processes the (local) addresses in the INIT-ACK chunk 2855 */ 2856 static void 2857 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2858 unsigned int offset, unsigned int length) 2859 { 2860 struct sctp_paramhdr tmp_param, *ph; 2861 uint16_t plen, ptype; 2862 struct sctp_ifa *sctp_ifa; 2863 struct sctp_ipv6addr_param addr_store; 2864 2865 #ifdef INET6 2866 struct sockaddr_in6 sin6; 2867 2868 #endif 2869 #ifdef INET 2870 struct sockaddr_in sin; 2871 2872 #endif 2873 struct sockaddr *sa; 2874 uint32_t vrf_id; 2875 2876 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2877 if (stcb == NULL) /* Un-needed check for SA */ 2878 return; 2879 2880 /* convert to upper bound */ 2881 length += offset; 2882 2883 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2884 return; 2885 } 2886 /* init the addresses */ 2887 #ifdef INET6 2888 bzero(&sin6, sizeof(sin6)); 2889 sin6.sin6_family = AF_INET6; 2890 sin6.sin6_len = sizeof(sin6); 2891 sin6.sin6_port = stcb->rport; 2892 #endif 2893 2894 #ifdef INET 2895 bzero(&sin, sizeof(sin)); 2896 sin.sin_family = AF_INET; 2897 sin.sin_len = sizeof(sin); 2898 sin.sin_port = stcb->rport; 2899 #endif 2900 2901 /* go through the addresses in the init-ack */ 2902 ph = (struct sctp_paramhdr *) 2903 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2904 (uint8_t *) & tmp_param); 2905 while (ph != NULL) { 2906 ptype = ntohs(ph->param_type); 2907 plen = ntohs(ph->param_length); 2908 switch (ptype) { 2909 #ifdef INET6 2910 case SCTP_IPV6_ADDRESS: 2911 { 2912 struct sctp_ipv6addr_param *a6p; 2913 2914 /* get the entire IPv6 address param */ 2915 a6p = (struct sctp_ipv6addr_param *) 2916 sctp_m_getptr(m, offset, 2917 sizeof(struct sctp_ipv6addr_param), 2918 (uint8_t *) & addr_store); 2919 if (plen != sizeof(struct sctp_ipv6addr_param) || 2920 a6p == NULL) { 2921 return; 2922 } 2923 memcpy(&sin6.sin6_addr, a6p->addr, 2924 sizeof(struct in6_addr)); 2925 sa = (struct sockaddr *)&sin6; 2926 break; 2927 } 2928 #endif 2929 #ifdef INET 2930 case SCTP_IPV4_ADDRESS: 2931 { 2932 struct sctp_ipv4addr_param *a4p; 2933 2934 /* get the entire IPv4 address param */ 2935 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2936 sizeof(struct sctp_ipv4addr_param), 2937 (uint8_t *) & addr_store); 2938 if (plen != sizeof(struct sctp_ipv4addr_param) || 2939 a4p == NULL) { 2940 return; 2941 } 2942 sin.sin_addr.s_addr = a4p->addr; 2943 sa = (struct sockaddr *)&sin; 2944 break; 2945 } 2946 #endif 2947 default: 2948 goto next_addr; 2949 } 2950 2951 /* see if this address really (still) exists */ 2952 if (stcb) { 2953 vrf_id = stcb->asoc.vrf_id; 2954 } else { 2955 vrf_id = SCTP_DEFAULT_VRFID; 2956 } 2957 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id, 2958 SCTP_ADDR_NOT_LOCKED); 2959 if (sctp_ifa == NULL) { 2960 /* address doesn't exist anymore */ 2961 int status; 2962 2963 /* are ASCONFs allowed ? */ 2964 if ((sctp_is_feature_on(stcb->sctp_ep, 2965 SCTP_PCB_FLAGS_DO_ASCONF)) && 2966 stcb->asoc.peer_supports_asconf) { 2967 /* queue an ASCONF DEL_IP_ADDRESS */ 2968 status = sctp_asconf_queue_sa_delete(stcb, sa); 2969 /* 2970 * if queued ok, and in correct state, send 2971 * out the ASCONF. 2972 */ 2973 if (status == 0 && 2974 SCTP_GET_STATE(&stcb->asoc) == 2975 SCTP_STATE_OPEN) { 2976 #ifdef SCTP_TIMER_BASED_ASCONF 2977 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2978 stcb->sctp_ep, stcb, 2979 stcb->asoc.primary_destination); 2980 #else 2981 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2982 #endif 2983 } 2984 } 2985 } 2986 next_addr: 2987 /* 2988 * Sanity check: Make sure the length isn't 0, otherwise 2989 * we'll be stuck in this loop for a long time... 2990 */ 2991 if (SCTP_SIZE32(plen) == 0) { 2992 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2993 plen, ptype); 2994 return; 2995 } 2996 /* get next parameter */ 2997 offset += SCTP_SIZE32(plen); 2998 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2999 return; 3000 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 3001 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 3002 } /* while */ 3003 } 3004 3005 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 3006 /* 3007 * checks to see if a specific address is in the initack address list returns 3008 * 1 if found, 0 if not 3009 */ 3010 static uint32_t 3011 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 3012 { 3013 struct sctp_paramhdr tmp_param, *ph; 3014 uint16_t plen, ptype; 3015 struct sctp_ipv6addr_param addr_store; 3016 3017 #ifdef INET 3018 struct sockaddr_in *sin; 3019 struct sctp_ipv4addr_param *a4p; 3020 3021 #endif 3022 #ifdef INET6 3023 struct sockaddr_in6 *sin6; 3024 struct sctp_ipv6addr_param *a6p; 3025 struct sockaddr_in6 sin6_tmp; 3026 3027 #endif 3028 3029 switch (sa->sa_family) { 3030 #ifdef INET 3031 case AF_INET: 3032 break; 3033 #endif 3034 #ifdef INET6 3035 case AF_INET6: 3036 break; 3037 #endif 3038 default: 3039 return (0); 3040 } 3041 3042 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 3043 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 3044 /* convert to upper bound */ 3045 length += offset; 3046 3047 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 3048 SCTPDBG(SCTP_DEBUG_ASCONF1, 3049 "find_initack_addr: invalid offset?\n"); 3050 return (0); 3051 } 3052 /* go through the addresses in the init-ack */ 3053 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 3054 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 3055 while (ph != NULL) { 3056 ptype = ntohs(ph->param_type); 3057 plen = ntohs(ph->param_length); 3058 switch (ptype) { 3059 #ifdef INET6 3060 case SCTP_IPV6_ADDRESS: 3061 if (sa->sa_family == AF_INET6) { 3062 /* get the entire IPv6 address param */ 3063 if (plen != sizeof(struct sctp_ipv6addr_param)) { 3064 break; 3065 } 3066 /* get the entire IPv6 address param */ 3067 a6p = (struct sctp_ipv6addr_param *) 3068 sctp_m_getptr(m, offset, 3069 sizeof(struct sctp_ipv6addr_param), 3070 (uint8_t *) & addr_store); 3071 if (a6p == NULL) { 3072 return (0); 3073 } 3074 sin6 = (struct sockaddr_in6 *)sa; 3075 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 3076 /* create a copy and clear scope */ 3077 memcpy(&sin6_tmp, sin6, 3078 sizeof(struct sockaddr_in6)); 3079 sin6 = &sin6_tmp; 3080 in6_clearscope(&sin6->sin6_addr); 3081 } 3082 if (memcmp(&sin6->sin6_addr, a6p->addr, 3083 sizeof(struct in6_addr)) == 0) { 3084 /* found it */ 3085 return (1); 3086 } 3087 } 3088 break; 3089 #endif /* INET6 */ 3090 #ifdef INET 3091 case SCTP_IPV4_ADDRESS: 3092 if (sa->sa_family == AF_INET) { 3093 if (plen != sizeof(struct sctp_ipv4addr_param)) { 3094 break; 3095 } 3096 /* get the entire IPv4 address param */ 3097 a4p = (struct sctp_ipv4addr_param *) 3098 sctp_m_getptr(m, offset, 3099 sizeof(struct sctp_ipv4addr_param), 3100 (uint8_t *) & addr_store); 3101 if (a4p == NULL) { 3102 return (0); 3103 } 3104 sin = (struct sockaddr_in *)sa; 3105 if (sin->sin_addr.s_addr == a4p->addr) { 3106 /* found it */ 3107 return (1); 3108 } 3109 } 3110 break; 3111 #endif 3112 default: 3113 break; 3114 } 3115 /* get next parameter */ 3116 offset += SCTP_SIZE32(plen); 3117 if (offset + sizeof(struct sctp_paramhdr) > length) { 3118 return (0); 3119 } 3120 ph = (struct sctp_paramhdr *) 3121 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3122 (uint8_t *) & tmp_param); 3123 } /* while */ 3124 /* not found! */ 3125 return (0); 3126 } 3127 3128 /* 3129 * makes sure that the current endpoint local addr list is consistent with 3130 * the new association (eg. subset bound, asconf allowed) adds addresses as 3131 * necessary 3132 */ 3133 static void 3134 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3135 int length, struct sockaddr *init_addr) 3136 { 3137 struct sctp_laddr *laddr; 3138 3139 /* go through the endpoint list */ 3140 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3141 /* be paranoid and validate the laddr */ 3142 if (laddr->ifa == NULL) { 3143 SCTPDBG(SCTP_DEBUG_ASCONF1, 3144 "check_addr_list_ep: laddr->ifa is NULL"); 3145 continue; 3146 } 3147 if (laddr->ifa == NULL) { 3148 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3149 continue; 3150 } 3151 /* do i have it implicitly? */ 3152 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3153 continue; 3154 } 3155 /* check to see if in the init-ack */ 3156 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3157 /* try to add it */ 3158 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3159 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3160 } 3161 } 3162 } 3163 3164 /* 3165 * makes sure that the current kernel address list is consistent with the new 3166 * association (with all addrs bound) adds addresses as necessary 3167 */ 3168 static void 3169 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3170 int length, struct sockaddr *init_addr, 3171 uint16_t local_scope, uint16_t site_scope, 3172 uint16_t ipv4_scope, uint16_t loopback_scope) 3173 { 3174 struct sctp_vrf *vrf = NULL; 3175 struct sctp_ifn *sctp_ifn; 3176 struct sctp_ifa *sctp_ifa; 3177 uint32_t vrf_id; 3178 3179 #ifdef INET 3180 struct sockaddr_in *sin; 3181 3182 #endif 3183 #ifdef INET6 3184 struct sockaddr_in6 *sin6; 3185 3186 #endif 3187 3188 if (stcb) { 3189 vrf_id = stcb->asoc.vrf_id; 3190 } else { 3191 return; 3192 } 3193 SCTP_IPI_ADDR_RLOCK(); 3194 vrf = sctp_find_vrf(vrf_id); 3195 if (vrf == NULL) { 3196 SCTP_IPI_ADDR_RUNLOCK(); 3197 return; 3198 } 3199 /* go through all our known interfaces */ 3200 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3201 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3202 /* skip loopback interface */ 3203 continue; 3204 } 3205 /* go through each interface address */ 3206 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3207 /* do i have it implicitly? */ 3208 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3209 continue; 3210 } 3211 switch (sctp_ifa->address.sa.sa_family) { 3212 #ifdef INET 3213 case AF_INET: 3214 sin = (struct sockaddr_in *)&sctp_ifa->address.sin; 3215 if ((ipv4_scope == 0) && 3216 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3217 /* private address not in scope */ 3218 continue; 3219 } 3220 break; 3221 #endif 3222 #ifdef INET6 3223 case AF_INET6: 3224 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sin6; 3225 if ((local_scope == 0) && 3226 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3227 continue; 3228 } 3229 if ((site_scope == 0) && 3230 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3231 continue; 3232 } 3233 break; 3234 #endif 3235 default: 3236 break; 3237 } 3238 /* check to see if in the init-ack */ 3239 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3240 /* try to add it */ 3241 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3242 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3243 SCTP_ADDR_LOCKED); 3244 } 3245 } /* end foreach ifa */ 3246 } /* end foreach ifn */ 3247 SCTP_IPI_ADDR_RUNLOCK(); 3248 } 3249 3250 /* 3251 * validates an init-ack chunk (from a cookie-echo) with current addresses 3252 * adds addresses from the init-ack into our local address list, if needed 3253 * queues asconf adds/deletes addresses as needed and makes appropriate list 3254 * changes for source address selection m, offset: points to the start of the 3255 * address list in an init-ack chunk length: total length of the address 3256 * params only init_addr: address where my INIT-ACK was sent from 3257 */ 3258 void 3259 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3260 int length, struct sockaddr *init_addr, 3261 uint16_t local_scope, uint16_t site_scope, 3262 uint16_t ipv4_scope, uint16_t loopback_scope) 3263 { 3264 /* process the local addresses in the initack */ 3265 sctp_process_initack_addresses(stcb, m, offset, length); 3266 3267 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3268 /* bound all case */ 3269 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3270 local_scope, site_scope, ipv4_scope, loopback_scope); 3271 } else { 3272 /* subset bound case */ 3273 if (sctp_is_feature_on(stcb->sctp_ep, 3274 SCTP_PCB_FLAGS_DO_ASCONF)) { 3275 /* asconf's allowed */ 3276 sctp_check_address_list_ep(stcb, m, offset, length, 3277 init_addr); 3278 } 3279 /* else, no asconfs allowed, so what we sent is what we get */ 3280 } 3281 } 3282 3283 /* 3284 * sctp_bindx() support 3285 */ 3286 uint32_t 3287 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3288 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3289 { 3290 struct sctp_ifa *ifa; 3291 struct sctp_laddr *laddr, *nladdr; 3292 3293 if (sa->sa_len == 0) { 3294 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3295 return (EINVAL); 3296 } 3297 if (sctp_ifap) { 3298 ifa = sctp_ifap; 3299 } else if (type == SCTP_ADD_IP_ADDRESS) { 3300 /* For an add the address MUST be on the system */ 3301 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3302 } else if (type == SCTP_DEL_IP_ADDRESS) { 3303 /* For a delete we need to find it in the inp */ 3304 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3305 } else { 3306 ifa = NULL; 3307 } 3308 if (ifa != NULL) { 3309 if (type == SCTP_ADD_IP_ADDRESS) { 3310 sctp_add_local_addr_ep(inp, ifa, type); 3311 } else if (type == SCTP_DEL_IP_ADDRESS) { 3312 if (inp->laddr_count < 2) { 3313 /* can't delete the last local address */ 3314 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3315 return (EINVAL); 3316 } 3317 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3318 sctp_nxt_addr) { 3319 if (ifa == laddr->ifa) { 3320 /* Mark in the delete */ 3321 laddr->action = type; 3322 } 3323 } 3324 } 3325 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3326 /* 3327 * There is no need to start the iterator if the inp 3328 * has no associations. 3329 */ 3330 if (type == SCTP_DEL_IP_ADDRESS) { 3331 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3332 if (laddr->ifa == ifa) { 3333 sctp_del_local_addr_ep(inp, ifa); 3334 } 3335 } 3336 } 3337 } else { 3338 struct sctp_asconf_iterator *asc; 3339 struct sctp_laddr *wi; 3340 3341 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3342 sizeof(struct sctp_asconf_iterator), 3343 SCTP_M_ASC_IT); 3344 if (asc == NULL) { 3345 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3346 return (ENOMEM); 3347 } 3348 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3349 if (wi == NULL) { 3350 SCTP_FREE(asc, SCTP_M_ASC_IT); 3351 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3352 return (ENOMEM); 3353 } 3354 LIST_INIT(&asc->list_of_work); 3355 asc->cnt = 1; 3356 SCTP_INCR_LADDR_COUNT(); 3357 wi->ifa = ifa; 3358 wi->action = type; 3359 atomic_add_int(&ifa->refcount, 1); 3360 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3361 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3362 sctp_asconf_iterator_stcb, 3363 sctp_asconf_iterator_ep_end, 3364 SCTP_PCB_ANY_FLAGS, 3365 SCTP_PCB_ANY_FEATURES, 3366 SCTP_ASOC_ANY_STATE, 3367 (void *)asc, 0, 3368 sctp_asconf_iterator_end, inp, 0); 3369 } 3370 return (0); 3371 } else { 3372 /* invalid address! */ 3373 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3374 return (EADDRNOTAVAIL); 3375 } 3376 } 3377 3378 void 3379 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3380 struct sctp_nets *net) 3381 { 3382 struct sctp_asconf_addr *aa; 3383 struct sctp_ifa *sctp_ifap; 3384 struct sctp_asconf_tag_param *vtag; 3385 3386 #ifdef INET 3387 struct sockaddr_in *to; 3388 3389 #endif 3390 #ifdef INET6 3391 struct sockaddr_in6 *to6; 3392 3393 #endif 3394 if (net == NULL) { 3395 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3396 return; 3397 } 3398 if (stcb == NULL) { 3399 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3400 return; 3401 } 3402 /* 3403 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3404 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3405 */ 3406 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3407 SCTP_M_ASC_ADDR); 3408 if (aa == NULL) { 3409 /* didn't get memory */ 3410 SCTPDBG(SCTP_DEBUG_ASCONF1, 3411 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3412 return; 3413 } 3414 aa->special_del = 0; 3415 /* fill in asconf address parameter fields */ 3416 /* top level elements are "networked" during send */ 3417 aa->ifa = NULL; 3418 aa->sent = 0; /* clear sent flag */ 3419 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3420 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3421 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3422 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3423 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3424 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3425 3426 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3427 SCTP_M_ASC_ADDR); 3428 if (aa == NULL) { 3429 /* didn't get memory */ 3430 SCTPDBG(SCTP_DEBUG_ASCONF1, 3431 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3432 return; 3433 } 3434 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3435 /* fill in asconf address parameter fields */ 3436 /* ADD(0.0.0.0) */ 3437 switch (net->ro._l_addr.sa.sa_family) { 3438 #ifdef INET 3439 case AF_INET: 3440 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3441 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3442 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3443 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3444 /* No need to add an address, we are using 0.0.0.0 */ 3445 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3446 break; 3447 #endif 3448 #ifdef INET6 3449 case AF_INET6: 3450 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3451 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3452 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3453 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3454 /* No need to add an address, we are using 0.0.0.0 */ 3455 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3456 break; 3457 #endif 3458 } 3459 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3460 SCTP_M_ASC_ADDR); 3461 if (aa == NULL) { 3462 /* didn't get memory */ 3463 SCTPDBG(SCTP_DEBUG_ASCONF1, 3464 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3465 return; 3466 } 3467 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3468 /* fill in asconf address parameter fields */ 3469 /* ADD(0.0.0.0) */ 3470 switch (net->ro._l_addr.sa.sa_family) { 3471 #ifdef INET 3472 case AF_INET: 3473 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3474 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3475 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3476 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3477 /* No need to add an address, we are using 0.0.0.0 */ 3478 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3479 break; 3480 #endif 3481 #ifdef INET6 3482 case AF_INET6: 3483 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3484 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3485 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3486 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3487 /* No need to add an address, we are using 0.0.0.0 */ 3488 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3489 break; 3490 #endif 3491 } 3492 /* Now we must hunt the addresses and add all global addresses */ 3493 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3494 struct sctp_vrf *vrf = NULL; 3495 struct sctp_ifn *sctp_ifnp; 3496 uint32_t vrf_id; 3497 3498 vrf_id = stcb->sctp_ep->def_vrf_id; 3499 vrf = sctp_find_vrf(vrf_id); 3500 if (vrf == NULL) { 3501 goto skip_rest; 3502 } 3503 SCTP_IPI_ADDR_RLOCK(); 3504 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3505 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3506 switch (sctp_ifap->address.sa.sa_family) { 3507 #ifdef INET 3508 case AF_INET: 3509 to = &sctp_ifap->address.sin; 3510 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3511 continue; 3512 } 3513 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3514 continue; 3515 } 3516 break; 3517 #endif 3518 #ifdef INET6 3519 case AF_INET6: 3520 to6 = &sctp_ifap->address.sin6; 3521 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3522 continue; 3523 } 3524 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3525 continue; 3526 } 3527 break; 3528 #endif 3529 default: 3530 continue; 3531 } 3532 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3533 } 3534 } 3535 SCTP_IPI_ADDR_RUNLOCK(); 3536 } else { 3537 struct sctp_laddr *laddr; 3538 3539 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3540 if (laddr->ifa == NULL) { 3541 continue; 3542 } 3543 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3544 /* 3545 * Address being deleted by the system, dont 3546 * list. 3547 */ 3548 continue; 3549 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3550 /* 3551 * Address being deleted on this ep don't 3552 * list. 3553 */ 3554 continue; 3555 } 3556 sctp_ifap = laddr->ifa; 3557 switch (sctp_ifap->address.sa.sa_family) { 3558 #ifdef INET 3559 case AF_INET: 3560 to = &sctp_ifap->address.sin; 3561 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3562 continue; 3563 } 3564 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3565 continue; 3566 } 3567 break; 3568 #endif 3569 #ifdef INET6 3570 case AF_INET6: 3571 to6 = &sctp_ifap->address.sin6; 3572 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3573 continue; 3574 } 3575 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3576 continue; 3577 } 3578 break; 3579 #endif 3580 default: 3581 continue; 3582 } 3583 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3584 } 3585 } 3586 skip_rest: 3587 /* Now we must send the asconf into the queue */ 3588 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3589 }
Cache object: cd885a35b03d4807259ecf5e2b6381da
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]