1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <netinet/sctp_var.h> 38 #include <netinet/sctp_sysctl.h> 39 #include <netinet/sctp_pcb.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp_output.h> 43 #include <netinet/sctp_asconf.h> 44 #include <netinet/sctp_timer.h> 45 46 /* 47 * debug flags: 48 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 49 * SCTP_DEBUG_ASCONF2: detailed info 50 */ 51 52 53 /* 54 * RFC 5061 55 * 56 * An ASCONF parameter queue exists per asoc which holds the pending address 57 * operations. Lists are updated upon receipt of ASCONF-ACK. 58 * 59 * A restricted_addrs list exists per assoc to hold local addresses that are 60 * not (yet) usable by the assoc as a source address. These addresses are 61 * either pending an ASCONF operation (and exist on the ASCONF parameter 62 * queue), or they are permanently restricted (the peer has returned an 63 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 64 * 65 * Deleted addresses are always immediately removed from the lists as they will 66 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 67 * only if allowed. 68 */ 69 70 /* 71 * ASCONF parameter processing. 72 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 73 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 74 * FIX: allocating this many mbufs on the fly is pretty inefficient... 75 */ 76 static struct mbuf * 77 sctp_asconf_success_response(uint32_t id) 78 { 79 struct mbuf *m_reply = NULL; 80 struct sctp_asconf_paramhdr *aph; 81 82 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 83 0, M_NOWAIT, 1, MT_DATA); 84 if (m_reply == NULL) { 85 SCTPDBG(SCTP_DEBUG_ASCONF1, 86 "asconf_success_response: couldn't get mbuf!\n"); 87 return (NULL); 88 } 89 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 90 aph->correlation_id = id; 91 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 92 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 93 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 94 aph->ph.param_length = htons(aph->ph.param_length); 95 96 return (m_reply); 97 } 98 99 static struct mbuf * 100 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv, 101 uint16_t tlv_length) 102 { 103 struct mbuf *m_reply = NULL; 104 struct sctp_asconf_paramhdr *aph; 105 struct sctp_error_cause *error; 106 uint8_t *tlv; 107 108 m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) + 109 tlv_length + 110 sizeof(struct sctp_error_cause)), 111 0, M_NOWAIT, 1, MT_DATA); 112 if (m_reply == NULL) { 113 SCTPDBG(SCTP_DEBUG_ASCONF1, 114 "asconf_error_response: couldn't get mbuf!\n"); 115 return (NULL); 116 } 117 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 118 error = (struct sctp_error_cause *)(aph + 1); 119 120 aph->correlation_id = id; 121 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 122 error->code = htons(cause); 123 error->length = tlv_length + sizeof(struct sctp_error_cause); 124 aph->ph.param_length = error->length + 125 sizeof(struct sctp_asconf_paramhdr); 126 127 if (aph->ph.param_length > MLEN) { 128 SCTPDBG(SCTP_DEBUG_ASCONF1, 129 "asconf_error_response: tlv_length (%xh) too big\n", 130 tlv_length); 131 sctp_m_freem(m_reply); /* discard */ 132 return (NULL); 133 } 134 if (error_tlv != NULL) { 135 tlv = (uint8_t *) (error + 1); 136 memcpy(tlv, error_tlv, tlv_length); 137 } 138 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 139 error->length = htons(error->length); 140 aph->ph.param_length = htons(aph->ph.param_length); 141 142 return (m_reply); 143 } 144 145 static struct mbuf * 146 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, 147 struct sctp_tcb *stcb, int send_hb, int response_required) 148 { 149 struct sctp_nets *net; 150 struct mbuf *m_reply = NULL; 151 union sctp_sockstore store; 152 struct sctp_paramhdr *ph; 153 uint16_t param_type, aparam_length; 154 155 #if defined(INET) || defined(INET6) 156 uint16_t param_length; 157 158 #endif 159 struct sockaddr *sa; 160 int zero_address = 0; 161 int bad_address = 0; 162 163 #ifdef INET 164 struct sockaddr_in *sin; 165 struct sctp_ipv4addr_param *v4addr; 166 167 #endif 168 #ifdef INET6 169 struct sockaddr_in6 *sin6; 170 struct sctp_ipv6addr_param *v6addr; 171 172 #endif 173 174 aparam_length = ntohs(aph->ph.param_length); 175 ph = (struct sctp_paramhdr *)(aph + 1); 176 param_type = ntohs(ph->param_type); 177 #if defined(INET) || defined(INET6) 178 param_length = ntohs(ph->param_length); 179 #endif 180 sa = &store.sa; 181 switch (param_type) { 182 #ifdef INET 183 case SCTP_IPV4_ADDRESS: 184 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 185 /* invalid param size */ 186 return (NULL); 187 } 188 v4addr = (struct sctp_ipv4addr_param *)ph; 189 sin = &store.sin; 190 bzero(sin, sizeof(*sin)); 191 sin->sin_family = AF_INET; 192 sin->sin_len = sizeof(struct sockaddr_in); 193 sin->sin_port = stcb->rport; 194 sin->sin_addr.s_addr = v4addr->addr; 195 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 196 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 197 bad_address = 1; 198 } 199 if (sin->sin_addr.s_addr == INADDR_ANY) 200 zero_address = 1; 201 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 202 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 203 break; 204 #endif 205 #ifdef INET6 206 case SCTP_IPV6_ADDRESS: 207 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 208 /* invalid param size */ 209 return (NULL); 210 } 211 v6addr = (struct sctp_ipv6addr_param *)ph; 212 sin6 = &store.sin6; 213 bzero(sin6, sizeof(*sin6)); 214 sin6->sin6_family = AF_INET6; 215 sin6->sin6_len = sizeof(struct sockaddr_in6); 216 sin6->sin6_port = stcb->rport; 217 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 218 sizeof(struct in6_addr)); 219 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 220 bad_address = 1; 221 } 222 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 223 zero_address = 1; 224 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 225 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 226 break; 227 #endif 228 default: 229 m_reply = sctp_asconf_error_response(aph->correlation_id, 230 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 231 aparam_length); 232 return (m_reply); 233 } /* end switch */ 234 235 /* if 0.0.0.0/::0, add the source address instead */ 236 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 237 sa = src; 238 SCTPDBG(SCTP_DEBUG_ASCONF1, 239 "process_asconf_add_ip: using source addr "); 240 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 241 } 242 /* add the address */ 243 if (bad_address) { 244 m_reply = sctp_asconf_error_response(aph->correlation_id, 245 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 246 aparam_length); 247 } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE, 248 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 249 SCTPDBG(SCTP_DEBUG_ASCONF1, 250 "process_asconf_add_ip: error adding address\n"); 251 m_reply = sctp_asconf_error_response(aph->correlation_id, 252 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph, 253 aparam_length); 254 } else { 255 /* notify upper layer */ 256 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 257 if (response_required) { 258 m_reply = 259 sctp_asconf_success_response(aph->correlation_id); 260 } 261 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 262 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 263 stcb, net); 264 if (send_hb) { 265 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 266 } 267 } 268 return (m_reply); 269 } 270 271 static int 272 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 273 { 274 struct sctp_nets *src_net, *net; 275 276 /* make sure the source address exists as a destination net */ 277 src_net = sctp_findnet(stcb, src); 278 if (src_net == NULL) { 279 /* not found */ 280 return (-1); 281 } 282 /* delete all destination addresses except the source */ 283 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 284 if (net != src_net) { 285 /* delete this address */ 286 sctp_remove_net(stcb, net); 287 SCTPDBG(SCTP_DEBUG_ASCONF1, 288 "asconf_del_remote_addrs_except: deleting "); 289 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 290 (struct sockaddr *)&net->ro._l_addr); 291 /* notify upper layer */ 292 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 293 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 294 } 295 } 296 return (0); 297 } 298 299 static struct mbuf * 300 sctp_process_asconf_delete_ip(struct sockaddr *src, 301 struct sctp_asconf_paramhdr *aph, 302 struct sctp_tcb *stcb, int response_required) 303 { 304 struct mbuf *m_reply = NULL; 305 union sctp_sockstore store; 306 struct sctp_paramhdr *ph; 307 uint16_t param_type, aparam_length; 308 309 #if defined(INET) || defined(INET6) 310 uint16_t param_length; 311 312 #endif 313 struct sockaddr *sa; 314 int zero_address = 0; 315 int result; 316 317 #ifdef INET 318 struct sockaddr_in *sin; 319 struct sctp_ipv4addr_param *v4addr; 320 321 #endif 322 #ifdef INET6 323 struct sockaddr_in6 *sin6; 324 struct sctp_ipv6addr_param *v6addr; 325 326 #endif 327 328 aparam_length = ntohs(aph->ph.param_length); 329 ph = (struct sctp_paramhdr *)(aph + 1); 330 param_type = ntohs(ph->param_type); 331 #if defined(INET) || defined(INET6) 332 param_length = ntohs(ph->param_length); 333 #endif 334 sa = &store.sa; 335 switch (param_type) { 336 #ifdef INET 337 case SCTP_IPV4_ADDRESS: 338 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 339 /* invalid param size */ 340 return (NULL); 341 } 342 v4addr = (struct sctp_ipv4addr_param *)ph; 343 sin = &store.sin; 344 bzero(sin, sizeof(*sin)); 345 sin->sin_family = AF_INET; 346 sin->sin_len = sizeof(struct sockaddr_in); 347 sin->sin_port = stcb->rport; 348 sin->sin_addr.s_addr = v4addr->addr; 349 if (sin->sin_addr.s_addr == INADDR_ANY) 350 zero_address = 1; 351 SCTPDBG(SCTP_DEBUG_ASCONF1, 352 "process_asconf_delete_ip: deleting "); 353 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 354 break; 355 #endif 356 #ifdef INET6 357 case SCTP_IPV6_ADDRESS: 358 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 359 /* invalid param size */ 360 return (NULL); 361 } 362 v6addr = (struct sctp_ipv6addr_param *)ph; 363 sin6 = &store.sin6; 364 bzero(sin6, sizeof(*sin6)); 365 sin6->sin6_family = AF_INET6; 366 sin6->sin6_len = sizeof(struct sockaddr_in6); 367 sin6->sin6_port = stcb->rport; 368 memcpy(&sin6->sin6_addr, v6addr->addr, 369 sizeof(struct in6_addr)); 370 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 371 zero_address = 1; 372 SCTPDBG(SCTP_DEBUG_ASCONF1, 373 "process_asconf_delete_ip: deleting "); 374 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 375 break; 376 #endif 377 default: 378 m_reply = sctp_asconf_error_response(aph->correlation_id, 379 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 380 aparam_length); 381 return (m_reply); 382 } 383 384 /* make sure the source address is not being deleted */ 385 if (sctp_cmpaddr(sa, src)) { 386 /* trying to delete the source address! */ 387 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 388 m_reply = sctp_asconf_error_response(aph->correlation_id, 389 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, 390 aparam_length); 391 return (m_reply); 392 } 393 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 394 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 395 result = sctp_asconf_del_remote_addrs_except(stcb, src); 396 397 if (result) { 398 /* src address did not exist? */ 399 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 400 /* what error to reply with?? */ 401 m_reply = 402 sctp_asconf_error_response(aph->correlation_id, 403 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, 404 aparam_length); 405 } else if (response_required) { 406 m_reply = 407 sctp_asconf_success_response(aph->correlation_id); 408 } 409 return (m_reply); 410 } 411 /* delete the address */ 412 result = sctp_del_remote_addr(stcb, sa); 413 /* 414 * note if result == -2, the address doesn't exist in the asoc but 415 * since it's being deleted anyways, we just ack the delete -- but 416 * this probably means something has already gone awry 417 */ 418 if (result == -1) { 419 /* only one address in the asoc */ 420 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 421 m_reply = sctp_asconf_error_response(aph->correlation_id, 422 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, 423 aparam_length); 424 } else { 425 if (response_required) { 426 m_reply = sctp_asconf_success_response(aph->correlation_id); 427 } 428 /* notify upper layer */ 429 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 430 } 431 return (m_reply); 432 } 433 434 static struct mbuf * 435 sctp_process_asconf_set_primary(struct sockaddr *src, 436 struct sctp_asconf_paramhdr *aph, 437 struct sctp_tcb *stcb, int response_required) 438 { 439 struct mbuf *m_reply = NULL; 440 union sctp_sockstore store; 441 struct sctp_paramhdr *ph; 442 uint16_t param_type, aparam_length; 443 444 #if defined(INET) || defined(INET6) 445 uint16_t param_length; 446 447 #endif 448 struct sockaddr *sa; 449 int zero_address = 0; 450 451 #ifdef INET 452 struct sockaddr_in *sin; 453 struct sctp_ipv4addr_param *v4addr; 454 455 #endif 456 #ifdef INET6 457 struct sockaddr_in6 *sin6; 458 struct sctp_ipv6addr_param *v6addr; 459 460 #endif 461 462 aparam_length = ntohs(aph->ph.param_length); 463 ph = (struct sctp_paramhdr *)(aph + 1); 464 param_type = ntohs(ph->param_type); 465 #if defined(INET) || defined(INET6) 466 param_length = ntohs(ph->param_length); 467 #endif 468 sa = &store.sa; 469 switch (param_type) { 470 #ifdef INET 471 case SCTP_IPV4_ADDRESS: 472 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 473 /* invalid param size */ 474 return (NULL); 475 } 476 v4addr = (struct sctp_ipv4addr_param *)ph; 477 sin = &store.sin; 478 bzero(sin, sizeof(*sin)); 479 sin->sin_family = AF_INET; 480 sin->sin_len = sizeof(struct sockaddr_in); 481 sin->sin_addr.s_addr = v4addr->addr; 482 if (sin->sin_addr.s_addr == INADDR_ANY) 483 zero_address = 1; 484 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 485 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 486 break; 487 #endif 488 #ifdef INET6 489 case SCTP_IPV6_ADDRESS: 490 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 491 /* invalid param size */ 492 return (NULL); 493 } 494 v6addr = (struct sctp_ipv6addr_param *)ph; 495 sin6 = &store.sin6; 496 bzero(sin6, sizeof(*sin6)); 497 sin6->sin6_family = AF_INET6; 498 sin6->sin6_len = sizeof(struct sockaddr_in6); 499 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 500 sizeof(struct in6_addr)); 501 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 502 zero_address = 1; 503 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 504 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 505 break; 506 #endif 507 default: 508 m_reply = sctp_asconf_error_response(aph->correlation_id, 509 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 510 aparam_length); 511 return (m_reply); 512 } 513 514 /* if 0.0.0.0/::0, use the source address instead */ 515 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 516 sa = src; 517 SCTPDBG(SCTP_DEBUG_ASCONF1, 518 "process_asconf_set_primary: using source addr "); 519 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 520 } 521 /* set the primary address */ 522 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 523 SCTPDBG(SCTP_DEBUG_ASCONF1, 524 "process_asconf_set_primary: primary address set\n"); 525 /* notify upper layer */ 526 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 527 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 528 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 529 (stcb->asoc.alternate)) { 530 sctp_free_remote_addr(stcb->asoc.alternate); 531 stcb->asoc.alternate = NULL; 532 } 533 if (response_required) { 534 m_reply = sctp_asconf_success_response(aph->correlation_id); 535 } 536 /* 537 * Mobility adaptation. Ideally, when the reception of SET 538 * PRIMARY with DELETE IP ADDRESS of the previous primary 539 * destination, unacknowledged DATA are retransmitted 540 * immediately to the new primary destination for seamless 541 * handover. If the destination is UNCONFIRMED and marked to 542 * REQ_PRIM, The retransmission occur when reception of the 543 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 544 * sctp_input.c) Also, when change of the primary 545 * destination, it is better that all subsequent new DATA 546 * containing already queued DATA are transmitted to the new 547 * primary destination. (by micchie) 548 */ 549 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 550 SCTP_MOBILITY_BASE) || 551 sctp_is_mobility_feature_on(stcb->sctp_ep, 552 SCTP_MOBILITY_FASTHANDOFF)) && 553 sctp_is_mobility_feature_on(stcb->sctp_ep, 554 SCTP_MOBILITY_PRIM_DELETED) && 555 (stcb->asoc.primary_destination->dest_state & 556 SCTP_ADDR_UNCONFIRMED) == 0) { 557 558 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, 559 stcb->sctp_ep, stcb, NULL, 560 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1); 561 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 562 SCTP_MOBILITY_FASTHANDOFF)) { 563 sctp_assoc_immediate_retrans(stcb, 564 stcb->asoc.primary_destination); 565 } 566 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 567 SCTP_MOBILITY_BASE)) { 568 sctp_move_chunks_from_net(stcb, 569 stcb->asoc.deleted_primary); 570 } 571 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 572 stcb->asoc.deleted_primary); 573 } 574 } else { 575 /* couldn't set the requested primary address! */ 576 SCTPDBG(SCTP_DEBUG_ASCONF1, 577 "process_asconf_set_primary: set primary failed!\n"); 578 /* must have been an invalid address, so report */ 579 m_reply = sctp_asconf_error_response(aph->correlation_id, 580 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 581 aparam_length); 582 } 583 584 return (m_reply); 585 } 586 587 /* 588 * handles an ASCONF chunk. 589 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 590 */ 591 void 592 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 593 struct sockaddr *src, 594 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 595 int first) 596 { 597 struct sctp_association *asoc; 598 uint32_t serial_num; 599 struct mbuf *n, *m_ack, *m_result, *m_tail; 600 struct sctp_asconf_ack_chunk *ack_cp; 601 struct sctp_asconf_paramhdr *aph; 602 struct sctp_ipv6addr_param *p_addr; 603 unsigned int asconf_limit, cnt; 604 int error = 0; /* did an error occur? */ 605 606 /* asconf param buffer */ 607 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 608 struct sctp_asconf_ack *ack, *ack_next; 609 610 /* verify minimum length */ 611 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 612 SCTPDBG(SCTP_DEBUG_ASCONF1, 613 "handle_asconf: chunk too small = %xh\n", 614 ntohs(cp->ch.chunk_length)); 615 return; 616 } 617 asoc = &stcb->asoc; 618 serial_num = ntohl(cp->serial_number); 619 620 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 621 /* got a duplicate ASCONF */ 622 SCTPDBG(SCTP_DEBUG_ASCONF1, 623 "handle_asconf: got duplicate serial number = %xh\n", 624 serial_num); 625 return; 626 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 627 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 628 serial_num, asoc->asconf_seq_in + 1); 629 return; 630 } 631 /* it's the expected "next" sequence number, so process it */ 632 asoc->asconf_seq_in = serial_num; /* update sequence */ 633 /* get length of all the param's in the ASCONF */ 634 asconf_limit = offset + ntohs(cp->ch.chunk_length); 635 SCTPDBG(SCTP_DEBUG_ASCONF1, 636 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 637 asconf_limit, serial_num); 638 639 if (first) { 640 /* delete old cache */ 641 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 642 643 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 644 if (ack->serial_number == serial_num) 645 break; 646 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 647 ack->serial_number, serial_num); 648 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 649 if (ack->data != NULL) { 650 sctp_m_freem(ack->data); 651 } 652 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 653 } 654 } 655 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 656 M_NOWAIT, 1, MT_DATA); 657 if (m_ack == NULL) { 658 SCTPDBG(SCTP_DEBUG_ASCONF1, 659 "handle_asconf: couldn't get mbuf!\n"); 660 return; 661 } 662 m_tail = m_ack; /* current reply chain's tail */ 663 664 /* fill in ASCONF-ACK header */ 665 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 666 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 667 ack_cp->ch.chunk_flags = 0; 668 ack_cp->serial_number = htonl(serial_num); 669 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 670 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 671 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 672 673 /* skip the lookup address parameter */ 674 offset += sizeof(struct sctp_asconf_chunk); 675 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 676 if (p_addr == NULL) { 677 SCTPDBG(SCTP_DEBUG_ASCONF1, 678 "handle_asconf: couldn't get lookup addr!\n"); 679 /* respond with a missing/invalid mandatory parameter error */ 680 return; 681 } 682 /* param_length is already validated in process_control... */ 683 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 684 /* get pointer to first asconf param in ASCONF */ 685 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 686 if (aph == NULL) { 687 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 688 goto send_reply; 689 } 690 /* process through all parameters */ 691 cnt = 0; 692 while (aph != NULL) { 693 unsigned int param_length, param_type; 694 695 param_type = ntohs(aph->ph.param_type); 696 param_length = ntohs(aph->ph.param_length); 697 if (offset + param_length > asconf_limit) { 698 /* parameter goes beyond end of chunk! */ 699 sctp_m_freem(m_ack); 700 return; 701 } 702 m_result = NULL; 703 704 if (param_length > sizeof(aparam_buf)) { 705 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 706 sctp_m_freem(m_ack); 707 return; 708 } 709 if (param_length <= sizeof(struct sctp_paramhdr)) { 710 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 711 sctp_m_freem(m_ack); 712 } 713 /* get the entire parameter */ 714 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 715 if (aph == NULL) { 716 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 717 sctp_m_freem(m_ack); 718 return; 719 } 720 switch (param_type) { 721 case SCTP_ADD_IP_ADDRESS: 722 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 723 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 724 cnt++; 725 break; 726 case SCTP_DEL_IP_ADDRESS: 727 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 728 error); 729 break; 730 case SCTP_ERROR_CAUSE_IND: 731 /* not valid in an ASCONF chunk */ 732 break; 733 case SCTP_SET_PRIM_ADDR: 734 m_result = sctp_process_asconf_set_primary(src, aph, 735 stcb, error); 736 break; 737 case SCTP_NAT_VTAGS: 738 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 739 break; 740 case SCTP_SUCCESS_REPORT: 741 /* not valid in an ASCONF chunk */ 742 break; 743 case SCTP_ULP_ADAPTATION: 744 /* FIX */ 745 break; 746 default: 747 if ((param_type & 0x8000) == 0) { 748 /* Been told to STOP at this param */ 749 asconf_limit = offset; 750 /* 751 * FIX FIX - We need to call 752 * sctp_arethere_unrecognized_parameters() 753 * to get a operr and send it for any 754 * param's with the 0x4000 bit set OR do it 755 * here ourselves... note we still must STOP 756 * if the 0x8000 bit is clear. 757 */ 758 } 759 /* unknown/invalid param type */ 760 break; 761 } /* switch */ 762 763 /* add any (error) result to the reply mbuf chain */ 764 if (m_result != NULL) { 765 SCTP_BUF_NEXT(m_tail) = m_result; 766 m_tail = m_result; 767 /* update lengths, make sure it's aligned too */ 768 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 769 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 770 /* set flag to force success reports */ 771 error = 1; 772 } 773 offset += SCTP_SIZE32(param_length); 774 /* update remaining ASCONF message length to process */ 775 if (offset >= asconf_limit) { 776 /* no more data in the mbuf chain */ 777 break; 778 } 779 /* get pointer to next asconf param */ 780 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 781 sizeof(struct sctp_asconf_paramhdr), 782 (uint8_t *) & aparam_buf); 783 if (aph == NULL) { 784 /* can't get an asconf paramhdr */ 785 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 786 /* FIX ME - add error here... */ 787 } 788 } 789 790 send_reply: 791 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 792 /* save the ASCONF-ACK reply */ 793 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 794 struct sctp_asconf_ack); 795 if (ack == NULL) { 796 sctp_m_freem(m_ack); 797 return; 798 } 799 ack->serial_number = serial_num; 800 ack->last_sent_to = NULL; 801 ack->data = m_ack; 802 ack->len = 0; 803 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 804 ack->len += SCTP_BUF_LEN(n); 805 } 806 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 807 808 /* see if last_control_chunk_from is set properly (use IP src addr) */ 809 if (stcb->asoc.last_control_chunk_from == NULL) { 810 /* 811 * this could happen if the source address was just newly 812 * added 813 */ 814 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 815 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 816 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 817 /* look up the from address */ 818 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 819 #ifdef SCTP_DEBUG 820 if (stcb->asoc.last_control_chunk_from == NULL) { 821 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 822 } 823 #endif 824 } 825 } 826 827 /* 828 * does the address match? returns 0 if not, 1 if so 829 */ 830 static uint32_t 831 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 832 { 833 switch (sa->sa_family) { 834 #ifdef INET6 835 case AF_INET6: 836 { 837 /* XXX scopeid */ 838 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 839 840 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 841 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 842 sizeof(struct in6_addr)) == 0)) { 843 return (1); 844 } 845 break; 846 } 847 #endif 848 #ifdef INET 849 case AF_INET: 850 { 851 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 852 853 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 854 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 855 sizeof(struct in_addr)) == 0)) { 856 return (1); 857 } 858 break; 859 } 860 #endif 861 default: 862 break; 863 } 864 return (0); 865 } 866 867 /* 868 * does the address match? returns 0 if not, 1 if so 869 */ 870 static uint32_t 871 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 872 { 873 #if defined(INET) || defined(INET6) 874 uint16_t param_type, param_length; 875 876 param_type = ntohs(ph->param_type); 877 param_length = ntohs(ph->param_length); 878 #endif 879 switch (sa->sa_family) { 880 #ifdef INET6 881 case AF_INET6: 882 { 883 /* XXX scopeid */ 884 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 885 struct sctp_ipv6addr_param *v6addr; 886 887 v6addr = (struct sctp_ipv6addr_param *)ph; 888 if ((param_type == SCTP_IPV6_ADDRESS) && 889 (param_length == sizeof(struct sctp_ipv6addr_param)) && 890 (memcmp(&v6addr->addr, &sin6->sin6_addr, 891 sizeof(struct in6_addr)) == 0)) { 892 return (1); 893 } 894 break; 895 } 896 #endif 897 #ifdef INET 898 case AF_INET: 899 { 900 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 901 struct sctp_ipv4addr_param *v4addr; 902 903 v4addr = (struct sctp_ipv4addr_param *)ph; 904 if ((param_type == SCTP_IPV4_ADDRESS) && 905 (param_length == sizeof(struct sctp_ipv4addr_param)) && 906 (memcmp(&v4addr->addr, &sin->sin_addr, 907 sizeof(struct in_addr)) == 0)) { 908 return (1); 909 } 910 break; 911 } 912 #endif 913 default: 914 break; 915 } 916 return (0); 917 } 918 919 /* 920 * Cleanup for non-responded/OP ERR'd ASCONF 921 */ 922 void 923 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 924 { 925 /* 926 * clear out any existing asconfs going out 927 */ 928 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 929 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 930 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 931 /* remove the old ASCONF on our outbound queue */ 932 sctp_toss_old_asconf(stcb); 933 } 934 935 /* 936 * cleanup any cached source addresses that may be topologically 937 * incorrect after a new address has been added to this interface. 938 */ 939 static void 940 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 941 { 942 struct sctp_nets *net; 943 944 /* 945 * Ideally, we want to only clear cached routes and source addresses 946 * that are topologically incorrect. But since there is no easy way 947 * to know whether the newly added address on the ifn would cause a 948 * routing change (i.e. a new egress interface would be chosen) 949 * without doing a new routing lookup and source address selection, 950 * we will (for now) just flush any cached route using a different 951 * ifn (and cached source addrs) and let output re-choose them 952 * during the next send on that net. 953 */ 954 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 955 /* 956 * clear any cached route (and cached source address) if the 957 * route's interface is NOT the same as the address change. 958 * If it's the same interface, just clear the cached source 959 * address. 960 */ 961 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 962 ((ifn == NULL) || 963 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 964 /* clear any cached route */ 965 RTFREE(net->ro.ro_rt); 966 net->ro.ro_rt = NULL; 967 } 968 /* clear any cached source address */ 969 if (net->src_addr_selected) { 970 sctp_free_ifa(net->ro._s_addr); 971 net->ro._s_addr = NULL; 972 net->src_addr_selected = 0; 973 } 974 } 975 } 976 977 978 void 979 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 980 { 981 int error; 982 983 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 984 return; 985 } 986 if (stcb->asoc.deleted_primary == NULL) { 987 return; 988 } 989 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 990 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 991 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 992 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 993 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 994 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 995 stcb->asoc.deleted_primary, 996 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 997 stcb->asoc.num_send_timers_up--; 998 if (stcb->asoc.num_send_timers_up < 0) { 999 stcb->asoc.num_send_timers_up = 0; 1000 } 1001 SCTP_TCB_LOCK_ASSERT(stcb); 1002 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1003 stcb->asoc.deleted_primary); 1004 if (error) { 1005 SCTP_INP_DECR_REF(stcb->sctp_ep); 1006 return; 1007 } 1008 SCTP_TCB_LOCK_ASSERT(stcb); 1009 #ifdef SCTP_AUDITING_ENABLED 1010 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1011 #endif 1012 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1013 if ((stcb->asoc.num_send_timers_up == 0) && 1014 (stcb->asoc.sent_queue_cnt > 0)) { 1015 struct sctp_tmit_chunk *chk; 1016 1017 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1018 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1019 stcb, chk->whoTo); 1020 } 1021 } 1022 return; 1023 } 1024 1025 static int 1026 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1027 1028 void 1029 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1030 { 1031 struct sctp_tmit_chunk *chk; 1032 1033 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1034 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1035 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4); 1036 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1037 net->error_count = 0; 1038 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1039 if (chk->whoTo == net) { 1040 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1041 chk->sent = SCTP_DATAGRAM_RESEND; 1042 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1043 sctp_flight_size_decrease(chk); 1044 sctp_total_flight_decrease(stcb, chk); 1045 net->marked_retrans++; 1046 stcb->asoc.marked_retrans++; 1047 } 1048 } 1049 } 1050 if (net->marked_retrans) { 1051 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1052 } 1053 } 1054 1055 static void 1056 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1057 { 1058 struct sctp_nets *net; 1059 int addrnum, changed; 1060 1061 /* 1062 * If number of local valid addresses is 1, the valid address is 1063 * probably newly added address. Several valid addresses in this 1064 * association. A source address may not be changed. Additionally, 1065 * they can be configured on a same interface as "alias" addresses. 1066 * (by micchie) 1067 */ 1068 addrnum = sctp_local_addr_count(stcb); 1069 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1070 addrnum); 1071 if (addrnum == 1) { 1072 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1073 /* clear any cached route and source address */ 1074 if (net->ro.ro_rt) { 1075 RTFREE(net->ro.ro_rt); 1076 net->ro.ro_rt = NULL; 1077 } 1078 if (net->src_addr_selected) { 1079 sctp_free_ifa(net->ro._s_addr); 1080 net->ro._s_addr = NULL; 1081 net->src_addr_selected = 0; 1082 } 1083 /* Retransmit unacknowledged DATA chunks immediately */ 1084 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1085 SCTP_MOBILITY_FASTHANDOFF)) { 1086 sctp_net_immediate_retrans(stcb, net); 1087 } 1088 /* also, SET PRIMARY is maybe already sent */ 1089 } 1090 return; 1091 } 1092 /* Multiple local addresses exsist in the association. */ 1093 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1094 /* clear any cached route and source address */ 1095 if (net->ro.ro_rt) { 1096 RTFREE(net->ro.ro_rt); 1097 net->ro.ro_rt = NULL; 1098 } 1099 if (net->src_addr_selected) { 1100 sctp_free_ifa(net->ro._s_addr); 1101 net->ro._s_addr = NULL; 1102 net->src_addr_selected = 0; 1103 } 1104 /* 1105 * Check if the nexthop is corresponding to the new address. 1106 * If the new address is corresponding to the current 1107 * nexthop, the path will be changed. If the new address is 1108 * NOT corresponding to the current nexthop, the path will 1109 * not be changed. 1110 */ 1111 SCTP_RTALLOC((sctp_route_t *) & net->ro, 1112 stcb->sctp_ep->def_vrf_id); 1113 if (net->ro.ro_rt == NULL) 1114 continue; 1115 1116 changed = 0; 1117 switch (net->ro._l_addr.sa.sa_family) { 1118 #ifdef INET 1119 case AF_INET: 1120 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) { 1121 changed = 1; 1122 } 1123 break; 1124 #endif 1125 #ifdef INET6 1126 case AF_INET6: 1127 if (sctp_v6src_match_nexthop( 1128 &newifa->address.sin6, (sctp_route_t *) & net->ro)) { 1129 changed = 1; 1130 } 1131 break; 1132 #endif 1133 default: 1134 break; 1135 } 1136 /* 1137 * if the newly added address does not relate routing 1138 * information, we skip. 1139 */ 1140 if (changed == 0) 1141 continue; 1142 /* Retransmit unacknowledged DATA chunks immediately */ 1143 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1144 SCTP_MOBILITY_FASTHANDOFF)) { 1145 sctp_net_immediate_retrans(stcb, net); 1146 } 1147 /* Send SET PRIMARY for this new address */ 1148 if (net == stcb->asoc.primary_destination) { 1149 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1150 SCTP_SET_PRIM_ADDR); 1151 } 1152 } 1153 } 1154 1155 /* 1156 * process an ADD/DELETE IP ack from peer. 1157 * addr: corresponding sctp_ifa to the address being added/deleted. 1158 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1159 * flag: 1=success, 0=failure. 1160 */ 1161 static void 1162 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1163 { 1164 /* 1165 * do the necessary asoc list work- if we get a failure indication, 1166 * leave the address on the assoc's restricted list. If we get a 1167 * success indication, remove the address from the restricted list. 1168 */ 1169 /* 1170 * Note: this will only occur for ADD_IP_ADDRESS, since 1171 * DEL_IP_ADDRESS is never actually added to the list... 1172 */ 1173 if (flag) { 1174 /* success case, so remove from the restricted list */ 1175 sctp_del_local_addr_restricted(stcb, addr); 1176 1177 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1178 SCTP_MOBILITY_BASE) || 1179 sctp_is_mobility_feature_on(stcb->sctp_ep, 1180 SCTP_MOBILITY_FASTHANDOFF)) { 1181 sctp_path_check_and_react(stcb, addr); 1182 return; 1183 } 1184 /* clear any cached/topologically incorrect source addresses */ 1185 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1186 } 1187 /* else, leave it on the list */ 1188 } 1189 1190 /* 1191 * add an asconf add/delete/set primary IP address parameter to the queue. 1192 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1193 * returns 0 if queued, -1 if not queued/removed. 1194 * NOTE: if adding, but a delete for the same address is already scheduled 1195 * (and not yet sent out), simply remove it from queue. Same for deleting 1196 * an address already scheduled for add. If a duplicate operation is found, 1197 * ignore the new one. 1198 */ 1199 static int 1200 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1201 uint16_t type) 1202 { 1203 struct sctp_asconf_addr *aa, *aa_next; 1204 1205 /* make sure the request isn't already in the queue */ 1206 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1207 /* address match? */ 1208 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1209 continue; 1210 /* 1211 * is the request already in queue but not sent? pass the 1212 * request already sent in order to resolve the following 1213 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1214 * can't remove the ADD request already sent 3. arrival of 1215 * ADD 1216 */ 1217 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1218 return (-1); 1219 } 1220 /* is the negative request already in queue, and not sent */ 1221 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1222 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1223 /* add requested, delete already queued */ 1224 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1225 /* remove the ifa from the restricted list */ 1226 sctp_del_local_addr_restricted(stcb, ifa); 1227 /* free the asconf param */ 1228 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1229 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1230 return (-1); 1231 } 1232 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1233 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1234 /* delete requested, add already queued */ 1235 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1236 /* remove the aa->ifa from the restricted list */ 1237 sctp_del_local_addr_restricted(stcb, aa->ifa); 1238 /* free the asconf param */ 1239 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1240 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1241 return (-1); 1242 } 1243 } /* for each aa */ 1244 1245 /* adding new request to the queue */ 1246 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1247 SCTP_M_ASC_ADDR); 1248 if (aa == NULL) { 1249 /* didn't get memory */ 1250 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1251 return (-1); 1252 } 1253 aa->special_del = 0; 1254 /* fill in asconf address parameter fields */ 1255 /* top level elements are "networked" during send */ 1256 aa->ap.aph.ph.param_type = type; 1257 aa->ifa = ifa; 1258 atomic_add_int(&ifa->refcount, 1); 1259 /* correlation_id filled in during send routine later... */ 1260 switch (ifa->address.sa.sa_family) { 1261 #ifdef INET6 1262 case AF_INET6: 1263 { 1264 struct sockaddr_in6 *sin6; 1265 1266 sin6 = &ifa->address.sin6; 1267 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1268 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1269 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1270 sizeof(struct sctp_ipv6addr_param); 1271 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1272 sizeof(struct in6_addr)); 1273 break; 1274 } 1275 #endif 1276 #ifdef INET 1277 case AF_INET: 1278 { 1279 struct sockaddr_in *sin; 1280 1281 sin = &ifa->address.sin; 1282 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1283 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1284 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1285 sizeof(struct sctp_ipv4addr_param); 1286 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1287 sizeof(struct in_addr)); 1288 break; 1289 } 1290 #endif 1291 default: 1292 /* invalid family! */ 1293 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1294 sctp_free_ifa(ifa); 1295 return (-1); 1296 } 1297 aa->sent = 0; /* clear sent flag */ 1298 1299 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1300 #ifdef SCTP_DEBUG 1301 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1302 if (type == SCTP_ADD_IP_ADDRESS) { 1303 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1304 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1305 } else if (type == SCTP_DEL_IP_ADDRESS) { 1306 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1307 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1308 } else { 1309 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1310 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1311 } 1312 } 1313 #endif 1314 1315 return (0); 1316 } 1317 1318 1319 /* 1320 * add an asconf operation for the given ifa and type. 1321 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1322 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1323 * advisable. 1324 */ 1325 static int 1326 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1327 uint16_t type) 1328 { 1329 uint32_t status; 1330 int pending_delete_queued = 0; 1331 int last; 1332 1333 /* see if peer supports ASCONF */ 1334 if (stcb->asoc.asconf_supported == 0) { 1335 return (-1); 1336 } 1337 /* 1338 * if this is deleting the last address from the assoc, mark it as 1339 * pending. 1340 */ 1341 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { 1342 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1343 last = (sctp_local_addr_count(stcb) == 0); 1344 } else { 1345 last = (sctp_local_addr_count(stcb) == 1); 1346 } 1347 if (last) { 1348 /* set the pending delete info only */ 1349 stcb->asoc.asconf_del_pending = 1; 1350 stcb->asoc.asconf_addr_del_pending = ifa; 1351 atomic_add_int(&ifa->refcount, 1); 1352 SCTPDBG(SCTP_DEBUG_ASCONF2, 1353 "asconf_queue_add: mark delete last address pending\n"); 1354 return (-1); 1355 } 1356 } 1357 /* queue an asconf parameter */ 1358 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1359 1360 /* 1361 * if this is an add, and there is a delete also pending (i.e. the 1362 * last local address is being changed), queue the pending delete 1363 * too. 1364 */ 1365 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1366 /* queue in the pending delete */ 1367 if (sctp_asconf_queue_mgmt(stcb, 1368 stcb->asoc.asconf_addr_del_pending, 1369 SCTP_DEL_IP_ADDRESS) == 0) { 1370 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1371 pending_delete_queued = 1; 1372 /* clear out the pending delete info */ 1373 stcb->asoc.asconf_del_pending = 0; 1374 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1375 stcb->asoc.asconf_addr_del_pending = NULL; 1376 } 1377 } 1378 if (pending_delete_queued) { 1379 struct sctp_nets *net; 1380 1381 /* 1382 * since we know that the only/last address is now being 1383 * changed in this case, reset the cwnd/rto on all nets to 1384 * start as a new address and path. Also clear the error 1385 * counts to give the assoc the best chance to complete the 1386 * address change. 1387 */ 1388 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1389 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1390 net); 1391 net->RTO = 0; 1392 net->error_count = 0; 1393 } 1394 stcb->asoc.overall_error_count = 0; 1395 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1396 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1397 stcb->asoc.overall_error_count, 1398 0, 1399 SCTP_FROM_SCTP_ASCONF, 1400 __LINE__); 1401 } 1402 /* queue in an advisory set primary too */ 1403 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1404 /* let caller know we should send this out immediately */ 1405 status = 1; 1406 } 1407 return (status); 1408 } 1409 1410 /*- 1411 * add an asconf delete IP address parameter to the queue by sockaddr and 1412 * possibly with no sctp_ifa available. This is only called by the routine 1413 * that checks the addresses in an INIT-ACK against the current address list. 1414 * returns 0 if completed, non-zero if not completed. 1415 * NOTE: if an add is already scheduled (and not yet sent out), simply 1416 * remove it from queue. If a duplicate operation is found, ignore the 1417 * new one. 1418 */ 1419 static int 1420 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1421 { 1422 struct sctp_ifa *ifa; 1423 struct sctp_asconf_addr *aa, *aa_next; 1424 1425 if (stcb == NULL) { 1426 return (-1); 1427 } 1428 /* see if peer supports ASCONF */ 1429 if (stcb->asoc.asconf_supported == 0) { 1430 return (-1); 1431 } 1432 /* make sure the request isn't already in the queue */ 1433 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1434 /* address match? */ 1435 if (sctp_asconf_addr_match(aa, sa) == 0) 1436 continue; 1437 /* is the request already in queue (sent or not) */ 1438 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1439 return (-1); 1440 } 1441 /* is the negative request already in queue, and not sent */ 1442 if (aa->sent == 1) 1443 continue; 1444 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1445 /* add already queued, so remove existing entry */ 1446 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1447 sctp_del_local_addr_restricted(stcb, aa->ifa); 1448 /* free the entry */ 1449 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1450 return (-1); 1451 } 1452 } /* for each aa */ 1453 1454 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1455 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1456 1457 /* adding new request to the queue */ 1458 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1459 SCTP_M_ASC_ADDR); 1460 if (aa == NULL) { 1461 /* didn't get memory */ 1462 SCTPDBG(SCTP_DEBUG_ASCONF1, 1463 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1464 return (-1); 1465 } 1466 aa->special_del = 0; 1467 /* fill in asconf address parameter fields */ 1468 /* top level elements are "networked" during send */ 1469 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1470 aa->ifa = ifa; 1471 if (ifa) 1472 atomic_add_int(&ifa->refcount, 1); 1473 /* correlation_id filled in during send routine later... */ 1474 switch (sa->sa_family) { 1475 #ifdef INET6 1476 case AF_INET6: 1477 { 1478 /* IPv6 address */ 1479 struct sockaddr_in6 *sin6; 1480 1481 sin6 = (struct sockaddr_in6 *)sa; 1482 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1483 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1484 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1485 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1486 sizeof(struct in6_addr)); 1487 break; 1488 } 1489 #endif 1490 #ifdef INET 1491 case AF_INET: 1492 { 1493 /* IPv4 address */ 1494 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1495 1496 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1497 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1498 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1499 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1500 sizeof(struct in_addr)); 1501 break; 1502 } 1503 #endif 1504 default: 1505 /* invalid family! */ 1506 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1507 if (ifa) 1508 sctp_free_ifa(ifa); 1509 return (-1); 1510 } 1511 aa->sent = 0; /* clear sent flag */ 1512 1513 /* delete goes to the back of the queue */ 1514 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1515 1516 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1517 return (0); 1518 } 1519 1520 /* 1521 * find a specific asconf param on our "sent" queue 1522 */ 1523 static struct sctp_asconf_addr * 1524 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1525 { 1526 struct sctp_asconf_addr *aa; 1527 1528 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1529 if (aa->ap.aph.correlation_id == correlation_id && 1530 aa->sent == 1) { 1531 /* found it */ 1532 return (aa); 1533 } 1534 } 1535 /* didn't find it */ 1536 return (NULL); 1537 } 1538 1539 /* 1540 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1541 * notifications based on the error response 1542 */ 1543 static void 1544 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1545 struct sctp_asconf_paramhdr *aph) 1546 { 1547 struct sctp_error_cause *eh; 1548 struct sctp_paramhdr *ph; 1549 uint16_t param_type; 1550 uint16_t error_code; 1551 1552 eh = (struct sctp_error_cause *)(aph + 1); 1553 ph = (struct sctp_paramhdr *)(eh + 1); 1554 /* validate lengths */ 1555 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1556 htons(aph->ph.param_length)) { 1557 /* invalid error cause length */ 1558 SCTPDBG(SCTP_DEBUG_ASCONF1, 1559 "asconf_process_error: cause element too long\n"); 1560 return; 1561 } 1562 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1563 htons(eh->length)) { 1564 /* invalid included TLV length */ 1565 SCTPDBG(SCTP_DEBUG_ASCONF1, 1566 "asconf_process_error: included TLV too long\n"); 1567 return; 1568 } 1569 /* which error code ? */ 1570 error_code = ntohs(eh->code); 1571 param_type = ntohs(aph->ph.param_type); 1572 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1573 switch (error_code) { 1574 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1575 /* we allow ourselves to "try again" for this error */ 1576 break; 1577 default: 1578 /* peer can't handle it... */ 1579 switch (param_type) { 1580 case SCTP_ADD_IP_ADDRESS: 1581 case SCTP_DEL_IP_ADDRESS: 1582 case SCTP_SET_PRIM_ADDR: 1583 break; 1584 default: 1585 break; 1586 } 1587 } 1588 } 1589 1590 /* 1591 * process an asconf queue param. 1592 * aparam: parameter to process, will be removed from the queue. 1593 * flag: 1=success case, 0=failure case 1594 */ 1595 static void 1596 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1597 struct sctp_asconf_addr *aparam, uint32_t flag) 1598 { 1599 uint16_t param_type; 1600 1601 /* process this param */ 1602 param_type = aparam->ap.aph.ph.param_type; 1603 switch (param_type) { 1604 case SCTP_ADD_IP_ADDRESS: 1605 SCTPDBG(SCTP_DEBUG_ASCONF1, 1606 "process_param_ack: added IP address\n"); 1607 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1608 break; 1609 case SCTP_DEL_IP_ADDRESS: 1610 SCTPDBG(SCTP_DEBUG_ASCONF1, 1611 "process_param_ack: deleted IP address\n"); 1612 /* nothing really to do... lists already updated */ 1613 break; 1614 case SCTP_SET_PRIM_ADDR: 1615 SCTPDBG(SCTP_DEBUG_ASCONF1, 1616 "process_param_ack: set primary IP address\n"); 1617 /* nothing to do... peer may start using this addr */ 1618 break; 1619 default: 1620 /* should NEVER happen */ 1621 break; 1622 } 1623 1624 /* remove the param and free it */ 1625 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1626 if (aparam->ifa) 1627 sctp_free_ifa(aparam->ifa); 1628 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1629 } 1630 1631 /* 1632 * cleanup from a bad asconf ack parameter 1633 */ 1634 static void 1635 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1636 { 1637 /* assume peer doesn't really know how to do asconfs */ 1638 /* XXX we could free the pending queue here */ 1639 1640 } 1641 1642 void 1643 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1644 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1645 struct sctp_nets *net, int *abort_no_unlock) 1646 { 1647 struct sctp_association *asoc; 1648 uint32_t serial_num; 1649 uint16_t ack_length; 1650 struct sctp_asconf_paramhdr *aph; 1651 struct sctp_asconf_addr *aa, *aa_next; 1652 uint32_t last_error_id = 0; /* last error correlation id */ 1653 uint32_t id; 1654 struct sctp_asconf_addr *ap; 1655 1656 /* asconf param buffer */ 1657 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1658 1659 /* verify minimum length */ 1660 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1661 SCTPDBG(SCTP_DEBUG_ASCONF1, 1662 "handle_asconf_ack: chunk too small = %xh\n", 1663 ntohs(cp->ch.chunk_length)); 1664 return; 1665 } 1666 asoc = &stcb->asoc; 1667 serial_num = ntohl(cp->serial_number); 1668 1669 /* 1670 * NOTE: we may want to handle this differently- currently, we will 1671 * abort when we get an ack for the expected serial number + 1 (eg. 1672 * we didn't send it), process an ack normally if it is the expected 1673 * serial number, and re-send the previous ack for *ALL* other 1674 * serial numbers 1675 */ 1676 1677 /* 1678 * if the serial number is the next expected, but I didn't send it, 1679 * abort the asoc, since someone probably just hijacked us... 1680 */ 1681 if (serial_num == (asoc->asconf_seq_out + 1)) { 1682 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1683 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED); 1684 *abort_no_unlock = 1; 1685 return; 1686 } 1687 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1688 /* got a duplicate/unexpected ASCONF-ACK */ 1689 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1690 serial_num, asoc->asconf_seq_out_acked + 1); 1691 return; 1692 } 1693 if (serial_num == asoc->asconf_seq_out - 1) { 1694 /* stop our timer */ 1695 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1696 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1697 } 1698 /* process the ASCONF-ACK contents */ 1699 ack_length = ntohs(cp->ch.chunk_length) - 1700 sizeof(struct sctp_asconf_ack_chunk); 1701 offset += sizeof(struct sctp_asconf_ack_chunk); 1702 /* process through all parameters */ 1703 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1704 unsigned int param_length, param_type; 1705 1706 /* get pointer to next asconf parameter */ 1707 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1708 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1709 if (aph == NULL) { 1710 /* can't get an asconf paramhdr */ 1711 sctp_asconf_ack_clear(stcb); 1712 return; 1713 } 1714 param_type = ntohs(aph->ph.param_type); 1715 param_length = ntohs(aph->ph.param_length); 1716 if (param_length > ack_length) { 1717 sctp_asconf_ack_clear(stcb); 1718 return; 1719 } 1720 if (param_length < sizeof(struct sctp_paramhdr)) { 1721 sctp_asconf_ack_clear(stcb); 1722 return; 1723 } 1724 /* get the complete parameter... */ 1725 if (param_length > sizeof(aparam_buf)) { 1726 SCTPDBG(SCTP_DEBUG_ASCONF1, 1727 "param length (%u) larger than buffer size!\n", param_length); 1728 sctp_asconf_ack_clear(stcb); 1729 return; 1730 } 1731 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1732 if (aph == NULL) { 1733 sctp_asconf_ack_clear(stcb); 1734 return; 1735 } 1736 /* correlation_id is transparent to peer, no ntohl needed */ 1737 id = aph->correlation_id; 1738 1739 switch (param_type) { 1740 case SCTP_ERROR_CAUSE_IND: 1741 last_error_id = id; 1742 /* find the corresponding asconf param in our queue */ 1743 ap = sctp_asconf_find_param(stcb, id); 1744 if (ap == NULL) { 1745 /* hmm... can't find this in our queue! */ 1746 break; 1747 } 1748 /* process the parameter, failed flag */ 1749 sctp_asconf_process_param_ack(stcb, ap, 0); 1750 /* process the error response */ 1751 sctp_asconf_process_error(stcb, aph); 1752 break; 1753 case SCTP_SUCCESS_REPORT: 1754 /* find the corresponding asconf param in our queue */ 1755 ap = sctp_asconf_find_param(stcb, id); 1756 if (ap == NULL) { 1757 /* hmm... can't find this in our queue! */ 1758 break; 1759 } 1760 /* process the parameter, success flag */ 1761 sctp_asconf_process_param_ack(stcb, ap, 1); 1762 break; 1763 default: 1764 break; 1765 } /* switch */ 1766 1767 /* update remaining ASCONF-ACK message length to process */ 1768 ack_length -= SCTP_SIZE32(param_length); 1769 if (ack_length <= 0) { 1770 /* no more data in the mbuf chain */ 1771 break; 1772 } 1773 offset += SCTP_SIZE32(param_length); 1774 } /* while */ 1775 1776 /* 1777 * if there are any "sent" params still on the queue, these are 1778 * implicitly "success", or "failed" (if we got an error back) ... 1779 * so process these appropriately 1780 * 1781 * we assume that the correlation_id's are monotonically increasing 1782 * beginning from 1 and that we don't have *that* many outstanding 1783 * at any given time 1784 */ 1785 if (last_error_id == 0) 1786 last_error_id--;/* set to "max" value */ 1787 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1788 if (aa->sent == 1) { 1789 /* 1790 * implicitly successful or failed if correlation_id 1791 * < last_error_id, then success else, failure 1792 */ 1793 if (aa->ap.aph.correlation_id < last_error_id) 1794 sctp_asconf_process_param_ack(stcb, aa, 1); 1795 else 1796 sctp_asconf_process_param_ack(stcb, aa, 0); 1797 } else { 1798 /* 1799 * since we always process in order (FIFO queue) if 1800 * we reach one that hasn't been sent, the rest 1801 * should not have been sent either. so, we're 1802 * done... 1803 */ 1804 break; 1805 } 1806 } 1807 1808 /* update the next sequence number to use */ 1809 asoc->asconf_seq_out_acked++; 1810 /* remove the old ASCONF on our outbound queue */ 1811 sctp_toss_old_asconf(stcb); 1812 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1813 #ifdef SCTP_TIMER_BASED_ASCONF 1814 /* we have more params, so restart our timer */ 1815 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1816 stcb, net); 1817 #else 1818 /* we have more params, so send out more */ 1819 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1820 #endif 1821 } 1822 } 1823 1824 #ifdef INET6 1825 static uint32_t 1826 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1827 { 1828 struct sockaddr_in6 *sin6, *net6; 1829 struct sctp_nets *net; 1830 1831 if (sa->sa_family != AF_INET6) { 1832 /* wrong family */ 1833 return (0); 1834 } 1835 sin6 = (struct sockaddr_in6 *)sa; 1836 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1837 /* not link local address */ 1838 return (0); 1839 } 1840 /* hunt through our destination nets list for this scope_id */ 1841 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1842 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1843 AF_INET6) 1844 continue; 1845 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1846 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1847 continue; 1848 if (sctp_is_same_scope(sin6, net6)) { 1849 /* found one */ 1850 return (1); 1851 } 1852 } 1853 /* didn't find one */ 1854 return (0); 1855 } 1856 1857 #endif 1858 1859 /* 1860 * address management functions 1861 */ 1862 static void 1863 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1864 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1865 { 1866 int status; 1867 1868 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1869 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1870 /* subset bound, no ASCONF allowed case, so ignore */ 1871 return; 1872 } 1873 /* 1874 * note: we know this is not the subset bound, no ASCONF case eg. 1875 * this is boundall or subset bound w/ASCONF allowed 1876 */ 1877 1878 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1879 switch (ifa->address.sa.sa_family) { 1880 #ifdef INET6 1881 case AF_INET6: 1882 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1883 &ifa->address.sin6.sin6_addr) != 0) { 1884 return; 1885 } 1886 break; 1887 #endif 1888 #ifdef INET 1889 case AF_INET: 1890 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1891 &ifa->address.sin.sin_addr) != 0) { 1892 return; 1893 } 1894 break; 1895 #endif 1896 default: 1897 return; 1898 } 1899 #ifdef INET6 1900 /* make sure we're "allowed" to add this type of addr */ 1901 if (ifa->address.sa.sa_family == AF_INET6) { 1902 /* invalid if we're not a v6 endpoint */ 1903 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1904 return; 1905 /* is the v6 addr really valid ? */ 1906 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1907 return; 1908 } 1909 } 1910 #endif 1911 /* put this address on the "pending/do not use yet" list */ 1912 sctp_add_local_addr_restricted(stcb, ifa); 1913 /* 1914 * check address scope if address is out of scope, don't queue 1915 * anything... note: this would leave the address on both inp and 1916 * asoc lists 1917 */ 1918 switch (ifa->address.sa.sa_family) { 1919 #ifdef INET6 1920 case AF_INET6: 1921 { 1922 struct sockaddr_in6 *sin6; 1923 1924 sin6 = &ifa->address.sin6; 1925 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1926 /* we skip unspecifed addresses */ 1927 return; 1928 } 1929 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1930 if (stcb->asoc.scope.local_scope == 0) { 1931 return; 1932 } 1933 /* is it the right link local scope? */ 1934 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1935 return; 1936 } 1937 } 1938 if (stcb->asoc.scope.site_scope == 0 && 1939 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1940 return; 1941 } 1942 break; 1943 } 1944 #endif 1945 #ifdef INET 1946 case AF_INET: 1947 { 1948 struct sockaddr_in *sin; 1949 struct in6pcb *inp6; 1950 1951 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1952 /* invalid if we are a v6 only endpoint */ 1953 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1954 SCTP_IPV6_V6ONLY(inp6)) 1955 return; 1956 1957 sin = &ifa->address.sin; 1958 if (sin->sin_addr.s_addr == 0) { 1959 /* we skip unspecifed addresses */ 1960 return; 1961 } 1962 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1963 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1964 return; 1965 } 1966 break; 1967 } 1968 #endif 1969 default: 1970 /* else, not AF_INET or AF_INET6, so skip */ 1971 return; 1972 } 1973 1974 /* queue an asconf for this address add/delete */ 1975 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1976 /* does the peer do asconf? */ 1977 if (stcb->asoc.asconf_supported) { 1978 /* queue an asconf for this addr */ 1979 status = sctp_asconf_queue_add(stcb, ifa, type); 1980 1981 /* 1982 * if queued ok, and in the open state, send out the 1983 * ASCONF. If in the non-open state, these will be 1984 * sent when the state goes open. 1985 */ 1986 if (status == 0 && 1987 ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 1988 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 1989 #ifdef SCTP_TIMER_BASED_ASCONF 1990 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1991 stcb, stcb->asoc.primary_destination); 1992 #else 1993 sctp_send_asconf(stcb, NULL, addr_locked); 1994 #endif 1995 } 1996 } 1997 } 1998 } 1999 2000 2001 int 2002 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2003 { 2004 struct sctp_asconf_iterator *asc; 2005 struct sctp_ifa *ifa; 2006 struct sctp_laddr *l; 2007 int cnt_invalid = 0; 2008 2009 asc = (struct sctp_asconf_iterator *)ptr; 2010 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2011 ifa = l->ifa; 2012 switch (ifa->address.sa.sa_family) { 2013 #ifdef INET6 2014 case AF_INET6: 2015 /* invalid if we're not a v6 endpoint */ 2016 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2017 cnt_invalid++; 2018 if (asc->cnt == cnt_invalid) 2019 return (1); 2020 } 2021 break; 2022 #endif 2023 #ifdef INET 2024 case AF_INET: 2025 { 2026 /* invalid if we are a v6 only endpoint */ 2027 struct in6pcb *inp6; 2028 2029 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2030 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2031 SCTP_IPV6_V6ONLY(inp6)) { 2032 cnt_invalid++; 2033 if (asc->cnt == cnt_invalid) 2034 return (1); 2035 } 2036 break; 2037 } 2038 #endif 2039 default: 2040 /* invalid address family */ 2041 cnt_invalid++; 2042 if (asc->cnt == cnt_invalid) 2043 return (1); 2044 } 2045 } 2046 return (0); 2047 } 2048 2049 static int 2050 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2051 { 2052 struct sctp_ifa *ifa; 2053 struct sctp_asconf_iterator *asc; 2054 struct sctp_laddr *laddr, *nladdr, *l; 2055 2056 /* Only for specific case not bound all */ 2057 asc = (struct sctp_asconf_iterator *)ptr; 2058 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2059 ifa = l->ifa; 2060 if (l->action == SCTP_ADD_IP_ADDRESS) { 2061 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2062 sctp_nxt_addr) { 2063 if (laddr->ifa == ifa) { 2064 laddr->action = 0; 2065 break; 2066 } 2067 } 2068 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2069 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2070 /* remove only after all guys are done */ 2071 if (laddr->ifa == ifa) { 2072 sctp_del_local_addr_ep(inp, ifa); 2073 } 2074 } 2075 } 2076 } 2077 return (0); 2078 } 2079 2080 void 2081 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2082 void *ptr, uint32_t val SCTP_UNUSED) 2083 { 2084 struct sctp_asconf_iterator *asc; 2085 struct sctp_ifa *ifa; 2086 struct sctp_laddr *l; 2087 int cnt_invalid = 0; 2088 int type, status; 2089 int num_queued = 0; 2090 2091 asc = (struct sctp_asconf_iterator *)ptr; 2092 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2093 ifa = l->ifa; 2094 type = l->action; 2095 2096 /* address's vrf_id must be the vrf_id of the assoc */ 2097 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2098 continue; 2099 } 2100 /* Same checks again for assoc */ 2101 switch (ifa->address.sa.sa_family) { 2102 #ifdef INET6 2103 case AF_INET6: 2104 { 2105 /* invalid if we're not a v6 endpoint */ 2106 struct sockaddr_in6 *sin6; 2107 2108 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2109 cnt_invalid++; 2110 if (asc->cnt == cnt_invalid) 2111 return; 2112 else 2113 continue; 2114 } 2115 sin6 = &ifa->address.sin6; 2116 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2117 /* we skip unspecifed addresses */ 2118 continue; 2119 } 2120 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2121 &sin6->sin6_addr) != 0) { 2122 continue; 2123 } 2124 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2125 if (stcb->asoc.scope.local_scope == 0) { 2126 continue; 2127 } 2128 /* is it the right link local scope? */ 2129 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2130 continue; 2131 } 2132 } 2133 break; 2134 } 2135 #endif 2136 #ifdef INET 2137 case AF_INET: 2138 { 2139 /* invalid if we are a v6 only endpoint */ 2140 struct in6pcb *inp6; 2141 struct sockaddr_in *sin; 2142 2143 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2144 /* invalid if we are a v6 only endpoint */ 2145 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2146 SCTP_IPV6_V6ONLY(inp6)) 2147 continue; 2148 2149 sin = &ifa->address.sin; 2150 if (sin->sin_addr.s_addr == 0) { 2151 /* we skip unspecifed addresses */ 2152 continue; 2153 } 2154 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2155 &sin->sin_addr) != 0) { 2156 continue; 2157 } 2158 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2159 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2160 continue; 2161 } 2162 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2163 SCTP_IPV6_V6ONLY(inp6)) { 2164 cnt_invalid++; 2165 if (asc->cnt == cnt_invalid) 2166 return; 2167 else 2168 continue; 2169 } 2170 break; 2171 } 2172 #endif 2173 default: 2174 /* invalid address family */ 2175 cnt_invalid++; 2176 if (asc->cnt == cnt_invalid) 2177 return; 2178 else 2179 continue; 2180 break; 2181 } 2182 2183 if (type == SCTP_ADD_IP_ADDRESS) { 2184 /* prevent this address from being used as a source */ 2185 sctp_add_local_addr_restricted(stcb, ifa); 2186 } else if (type == SCTP_DEL_IP_ADDRESS) { 2187 struct sctp_nets *net; 2188 2189 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2190 sctp_rtentry_t *rt; 2191 2192 /* delete this address if cached */ 2193 if (net->ro._s_addr == ifa) { 2194 sctp_free_ifa(net->ro._s_addr); 2195 net->ro._s_addr = NULL; 2196 net->src_addr_selected = 0; 2197 rt = net->ro.ro_rt; 2198 if (rt) { 2199 RTFREE(rt); 2200 net->ro.ro_rt = NULL; 2201 } 2202 /* 2203 * Now we deleted our src address, 2204 * should we not also now reset the 2205 * cwnd/rto to start as if its a new 2206 * address? 2207 */ 2208 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2209 net->RTO = 0; 2210 2211 } 2212 } 2213 } else if (type == SCTP_SET_PRIM_ADDR) { 2214 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2215 /* must validate the ifa is in the ep */ 2216 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2217 continue; 2218 } 2219 } else { 2220 /* Need to check scopes for this guy */ 2221 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2222 continue; 2223 } 2224 } 2225 } 2226 /* queue an asconf for this address add/delete */ 2227 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2228 stcb->asoc.asconf_supported == 1) { 2229 /* queue an asconf for this addr */ 2230 status = sctp_asconf_queue_add(stcb, ifa, type); 2231 /* 2232 * if queued ok, and in the open state, update the 2233 * count of queued params. If in the non-open 2234 * state, these get sent when the assoc goes open. 2235 */ 2236 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2237 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2238 if (status >= 0) { 2239 num_queued++; 2240 } 2241 } 2242 } 2243 } 2244 /* 2245 * If we have queued params in the open state, send out an ASCONF. 2246 */ 2247 if (num_queued > 0) { 2248 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2249 } 2250 } 2251 2252 void 2253 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2254 { 2255 struct sctp_asconf_iterator *asc; 2256 struct sctp_ifa *ifa; 2257 struct sctp_laddr *l, *nl; 2258 2259 asc = (struct sctp_asconf_iterator *)ptr; 2260 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2261 ifa = l->ifa; 2262 if (l->action == SCTP_ADD_IP_ADDRESS) { 2263 /* Clear the defer use flag */ 2264 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2265 } 2266 sctp_free_ifa(ifa); 2267 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2268 SCTP_DECR_LADDR_COUNT(); 2269 } 2270 SCTP_FREE(asc, SCTP_M_ASC_IT); 2271 } 2272 2273 /* 2274 * sa is the sockaddr to ask the peer to set primary to. 2275 * returns: 0 = completed, -1 = error 2276 */ 2277 int32_t 2278 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2279 { 2280 uint32_t vrf_id; 2281 struct sctp_ifa *ifa; 2282 2283 /* find the ifa for the desired set primary */ 2284 vrf_id = stcb->asoc.vrf_id; 2285 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2286 if (ifa == NULL) { 2287 /* Invalid address */ 2288 return (-1); 2289 } 2290 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2291 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2292 /* set primary queuing succeeded */ 2293 SCTPDBG(SCTP_DEBUG_ASCONF1, 2294 "set_primary_ip_address_sa: queued on tcb=%p, ", 2295 (void *)stcb); 2296 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2297 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2298 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2299 #ifdef SCTP_TIMER_BASED_ASCONF 2300 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2301 stcb->sctp_ep, stcb, 2302 stcb->asoc.primary_destination); 2303 #else 2304 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2305 #endif 2306 } 2307 } else { 2308 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2309 (void *)stcb); 2310 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2311 return (-1); 2312 } 2313 return (0); 2314 } 2315 2316 void 2317 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2318 { 2319 struct sctp_inpcb *inp; 2320 2321 /* go through all our PCB's */ 2322 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2323 struct sctp_tcb *stcb; 2324 2325 /* process for all associations for this endpoint */ 2326 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2327 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2328 if (!sctp_asconf_queue_add(stcb, ifa, 2329 SCTP_SET_PRIM_ADDR)) { 2330 /* set primary queuing succeeded */ 2331 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2332 (void *)stcb); 2333 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2334 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2335 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2336 #ifdef SCTP_TIMER_BASED_ASCONF 2337 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2338 stcb->sctp_ep, stcb, 2339 stcb->asoc.primary_destination); 2340 #else 2341 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2342 #endif 2343 } 2344 } 2345 } /* for each stcb */ 2346 } /* for each inp */ 2347 } 2348 2349 int 2350 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2351 { 2352 struct sctp_tmit_chunk *chk, *nchk; 2353 unsigned int offset, asconf_limit; 2354 struct sctp_asconf_chunk *acp; 2355 struct sctp_asconf_paramhdr *aph; 2356 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2357 struct sctp_paramhdr *ph; 2358 int add_cnt, del_cnt; 2359 uint16_t last_param_type; 2360 2361 add_cnt = del_cnt = 0; 2362 last_param_type = 0; 2363 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2364 if (chk->data == NULL) { 2365 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2366 continue; 2367 } 2368 offset = 0; 2369 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2370 offset += sizeof(struct sctp_asconf_chunk); 2371 asconf_limit = ntohs(acp->ch.chunk_length); 2372 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2373 if (ph == NULL) { 2374 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2375 continue; 2376 } 2377 offset += ntohs(ph->param_length); 2378 2379 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2380 if (aph == NULL) { 2381 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2382 continue; 2383 } 2384 while (aph != NULL) { 2385 unsigned int param_length, param_type; 2386 2387 param_type = ntohs(aph->ph.param_type); 2388 param_length = ntohs(aph->ph.param_length); 2389 if (offset + param_length > asconf_limit) { 2390 /* parameter goes beyond end of chunk! */ 2391 break; 2392 } 2393 if (param_length > sizeof(aparam_buf)) { 2394 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2395 break; 2396 } 2397 if (param_length <= sizeof(struct sctp_paramhdr)) { 2398 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2399 break; 2400 } 2401 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2402 if (aph == NULL) { 2403 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2404 break; 2405 } 2406 ph = (struct sctp_paramhdr *)(aph + 1); 2407 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2408 switch (param_type) { 2409 case SCTP_ADD_IP_ADDRESS: 2410 add_cnt++; 2411 break; 2412 case SCTP_DEL_IP_ADDRESS: 2413 del_cnt++; 2414 break; 2415 default: 2416 break; 2417 } 2418 last_param_type = param_type; 2419 } 2420 offset += SCTP_SIZE32(param_length); 2421 if (offset >= asconf_limit) { 2422 /* no more data in the mbuf chain */ 2423 break; 2424 } 2425 /* get pointer to next asconf param */ 2426 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2427 } 2428 } 2429 2430 /* 2431 * we want to find the sequences which consist of ADD -> DEL -> ADD 2432 * or DEL -> ADD 2433 */ 2434 if (add_cnt > del_cnt || 2435 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2436 return (1); 2437 } 2438 return (0); 2439 } 2440 2441 static struct sockaddr * 2442 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2443 { 2444 struct sctp_vrf *vrf = NULL; 2445 struct sctp_ifn *sctp_ifn; 2446 struct sctp_ifa *sctp_ifa; 2447 2448 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2449 SCTP_IPI_ADDR_RLOCK(); 2450 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2451 if (vrf == NULL) { 2452 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2453 SCTP_IPI_ADDR_RUNLOCK(); 2454 return (NULL); 2455 } 2456 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2457 if (stcb->asoc.scope.loopback_scope == 0 && 2458 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2459 /* Skip if loopback_scope not set */ 2460 continue; 2461 } 2462 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2463 switch (sctp_ifa->address.sa.sa_family) { 2464 #ifdef INET 2465 case AF_INET: 2466 if (stcb->asoc.scope.ipv4_addr_legal) { 2467 struct sockaddr_in *sin; 2468 2469 sin = &sctp_ifa->address.sin; 2470 if (sin->sin_addr.s_addr == 0) { 2471 /* skip unspecifed addresses */ 2472 continue; 2473 } 2474 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2475 &sin->sin_addr) != 0) { 2476 continue; 2477 } 2478 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2479 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2480 continue; 2481 2482 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2483 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2484 continue; 2485 /* 2486 * found a valid local v4 address to 2487 * use 2488 */ 2489 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2490 SCTP_IPI_ADDR_RUNLOCK(); 2491 return (&sctp_ifa->address.sa); 2492 } 2493 break; 2494 #endif 2495 #ifdef INET6 2496 case AF_INET6: 2497 if (stcb->asoc.scope.ipv6_addr_legal) { 2498 struct sockaddr_in6 *sin6; 2499 2500 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2501 continue; 2502 } 2503 sin6 = &sctp_ifa->address.sin6; 2504 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2505 /* 2506 * we skip unspecifed 2507 * addresses 2508 */ 2509 continue; 2510 } 2511 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2512 &sin6->sin6_addr) != 0) { 2513 continue; 2514 } 2515 if (stcb->asoc.scope.local_scope == 0 && 2516 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2517 continue; 2518 if (stcb->asoc.scope.site_scope == 0 && 2519 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2520 continue; 2521 2522 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2523 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2524 continue; 2525 /* 2526 * found a valid local v6 address to 2527 * use 2528 */ 2529 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2530 SCTP_IPI_ADDR_RUNLOCK(); 2531 return (&sctp_ifa->address.sa); 2532 } 2533 break; 2534 #endif 2535 default: 2536 break; 2537 } 2538 } 2539 } 2540 /* no valid addresses found */ 2541 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2542 SCTP_IPI_ADDR_RUNLOCK(); 2543 return (NULL); 2544 } 2545 2546 static struct sockaddr * 2547 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2548 { 2549 struct sctp_laddr *laddr; 2550 2551 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2552 if (laddr->ifa == NULL) { 2553 continue; 2554 } 2555 /* is the address restricted ? */ 2556 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2557 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2558 continue; 2559 2560 /* found a valid local address to use */ 2561 return (&laddr->ifa->address.sa); 2562 } 2563 /* no valid addresses found */ 2564 return (NULL); 2565 } 2566 2567 /* 2568 * builds an ASCONF chunk from queued ASCONF params. 2569 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2570 */ 2571 struct mbuf * 2572 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2573 { 2574 struct mbuf *m_asconf, *m_asconf_chk; 2575 struct sctp_asconf_addr *aa; 2576 struct sctp_asconf_chunk *acp; 2577 struct sctp_asconf_paramhdr *aph; 2578 struct sctp_asconf_addr_param *aap; 2579 uint32_t p_length; 2580 uint32_t correlation_id = 1; /* 0 is reserved... */ 2581 caddr_t ptr, lookup_ptr; 2582 uint8_t lookup_used = 0; 2583 2584 /* are there any asconf params to send? */ 2585 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2586 if (aa->sent == 0) 2587 break; 2588 } 2589 if (aa == NULL) 2590 return (NULL); 2591 2592 /* 2593 * get a chunk header mbuf and a cluster for the asconf params since 2594 * it's simpler to fill in the asconf chunk header lookup address on 2595 * the fly 2596 */ 2597 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2598 if (m_asconf_chk == NULL) { 2599 /* no mbuf's */ 2600 SCTPDBG(SCTP_DEBUG_ASCONF1, 2601 "compose_asconf: couldn't get chunk mbuf!\n"); 2602 return (NULL); 2603 } 2604 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2605 if (m_asconf == NULL) { 2606 /* no mbuf's */ 2607 SCTPDBG(SCTP_DEBUG_ASCONF1, 2608 "compose_asconf: couldn't get mbuf!\n"); 2609 sctp_m_freem(m_asconf_chk); 2610 return (NULL); 2611 } 2612 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2613 SCTP_BUF_LEN(m_asconf) = 0; 2614 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2615 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2616 /* save pointers to lookup address and asconf params */ 2617 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2618 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2619 2620 /* fill in chunk header info */ 2621 acp->ch.chunk_type = SCTP_ASCONF; 2622 acp->ch.chunk_flags = 0; 2623 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2624 stcb->asoc.asconf_seq_out++; 2625 2626 /* add parameters... up to smallest MTU allowed */ 2627 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2628 if (aa->sent) 2629 continue; 2630 /* get the parameter length */ 2631 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2632 /* will it fit in current chunk? */ 2633 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2634 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2635 /* won't fit, so we're done with this chunk */ 2636 break; 2637 } 2638 /* assign (and store) a correlation id */ 2639 aa->ap.aph.correlation_id = correlation_id++; 2640 2641 /* 2642 * fill in address if we're doing a delete this is a simple 2643 * way for us to fill in the correlation address, which 2644 * should only be used by the peer if we're deleting our 2645 * source address and adding a new address (e.g. renumbering 2646 * case) 2647 */ 2648 if (lookup_used == 0 && 2649 (aa->special_del == 0) && 2650 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2651 struct sctp_ipv6addr_param *lookup; 2652 uint16_t p_size, addr_size; 2653 2654 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2655 lookup->ph.param_type = 2656 htons(aa->ap.addrp.ph.param_type); 2657 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2658 /* copy IPv6 address */ 2659 p_size = sizeof(struct sctp_ipv6addr_param); 2660 addr_size = sizeof(struct in6_addr); 2661 } else { 2662 /* copy IPv4 address */ 2663 p_size = sizeof(struct sctp_ipv4addr_param); 2664 addr_size = sizeof(struct in_addr); 2665 } 2666 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2667 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2668 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2669 lookup_used = 1; 2670 } 2671 /* copy into current space */ 2672 memcpy(ptr, &aa->ap, p_length); 2673 2674 /* network elements and update lengths */ 2675 aph = (struct sctp_asconf_paramhdr *)ptr; 2676 aap = (struct sctp_asconf_addr_param *)ptr; 2677 /* correlation_id is transparent to peer, no htonl needed */ 2678 aph->ph.param_type = htons(aph->ph.param_type); 2679 aph->ph.param_length = htons(aph->ph.param_length); 2680 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2681 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2682 2683 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2684 ptr += SCTP_SIZE32(p_length); 2685 2686 /* 2687 * these params are removed off the pending list upon 2688 * getting an ASCONF-ACK back from the peer, just set flag 2689 */ 2690 aa->sent = 1; 2691 } 2692 /* check to see if the lookup addr has been populated yet */ 2693 if (lookup_used == 0) { 2694 /* NOTE: if the address param is optional, can skip this... */ 2695 /* add any valid (existing) address... */ 2696 struct sctp_ipv6addr_param *lookup; 2697 uint16_t p_size, addr_size; 2698 struct sockaddr *found_addr; 2699 caddr_t addr_ptr; 2700 2701 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2702 found_addr = sctp_find_valid_localaddr(stcb, 2703 addr_locked); 2704 else 2705 found_addr = sctp_find_valid_localaddr_ep(stcb); 2706 2707 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2708 if (found_addr != NULL) { 2709 switch (found_addr->sa_family) { 2710 #ifdef INET6 2711 case AF_INET6: 2712 /* copy IPv6 address */ 2713 lookup->ph.param_type = 2714 htons(SCTP_IPV6_ADDRESS); 2715 p_size = sizeof(struct sctp_ipv6addr_param); 2716 addr_size = sizeof(struct in6_addr); 2717 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2718 found_addr)->sin6_addr; 2719 break; 2720 #endif 2721 #ifdef INET 2722 case AF_INET: 2723 /* copy IPv4 address */ 2724 lookup->ph.param_type = 2725 htons(SCTP_IPV4_ADDRESS); 2726 p_size = sizeof(struct sctp_ipv4addr_param); 2727 addr_size = sizeof(struct in_addr); 2728 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2729 found_addr)->sin_addr; 2730 break; 2731 #endif 2732 default: 2733 p_size = 0; 2734 addr_size = 0; 2735 addr_ptr = NULL; 2736 break; 2737 } 2738 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2739 memcpy(lookup->addr, addr_ptr, addr_size); 2740 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2741 } else { 2742 /* uh oh... don't have any address?? */ 2743 SCTPDBG(SCTP_DEBUG_ASCONF1, 2744 "compose_asconf: no lookup addr!\n"); 2745 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2746 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2747 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2748 bzero(lookup->addr, sizeof(struct in_addr)); 2749 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2750 } 2751 } 2752 /* chain it all together */ 2753 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2754 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2755 acp->ch.chunk_length = htons(*retlen); 2756 2757 return (m_asconf_chk); 2758 } 2759 2760 /* 2761 * section to handle address changes before an association is up eg. changes 2762 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2763 */ 2764 2765 /* 2766 * processes the (local) addresses in the INIT-ACK chunk 2767 */ 2768 static void 2769 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2770 unsigned int offset, unsigned int length) 2771 { 2772 struct sctp_paramhdr tmp_param, *ph; 2773 uint16_t plen, ptype; 2774 struct sctp_ifa *sctp_ifa; 2775 union sctp_sockstore store; 2776 2777 #ifdef INET6 2778 struct sctp_ipv6addr_param addr6_store; 2779 2780 #endif 2781 #ifdef INET 2782 struct sctp_ipv4addr_param addr4_store; 2783 2784 #endif 2785 2786 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2787 if (stcb == NULL) /* Un-needed check for SA */ 2788 return; 2789 2790 /* convert to upper bound */ 2791 length += offset; 2792 2793 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2794 return; 2795 } 2796 /* go through the addresses in the init-ack */ 2797 ph = (struct sctp_paramhdr *) 2798 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2799 (uint8_t *) & tmp_param); 2800 while (ph != NULL) { 2801 ptype = ntohs(ph->param_type); 2802 plen = ntohs(ph->param_length); 2803 switch (ptype) { 2804 #ifdef INET6 2805 case SCTP_IPV6_ADDRESS: 2806 { 2807 struct sctp_ipv6addr_param *a6p; 2808 2809 /* get the entire IPv6 address param */ 2810 a6p = (struct sctp_ipv6addr_param *) 2811 sctp_m_getptr(m, offset, 2812 sizeof(struct sctp_ipv6addr_param), 2813 (uint8_t *) & addr6_store); 2814 if (plen != sizeof(struct sctp_ipv6addr_param) || 2815 a6p == NULL) { 2816 return; 2817 } 2818 memset(&store, 0, sizeof(union sctp_sockstore)); 2819 store.sin6.sin6_family = AF_INET6; 2820 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2821 store.sin6.sin6_port = stcb->rport; 2822 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2823 break; 2824 } 2825 #endif 2826 #ifdef INET 2827 case SCTP_IPV4_ADDRESS: 2828 { 2829 struct sctp_ipv4addr_param *a4p; 2830 2831 /* get the entire IPv4 address param */ 2832 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2833 sizeof(struct sctp_ipv4addr_param), 2834 (uint8_t *) & addr4_store); 2835 if (plen != sizeof(struct sctp_ipv4addr_param) || 2836 a4p == NULL) { 2837 return; 2838 } 2839 memset(&store, 0, sizeof(union sctp_sockstore)); 2840 store.sin.sin_family = AF_INET; 2841 store.sin.sin_len = sizeof(struct sockaddr_in); 2842 store.sin.sin_port = stcb->rport; 2843 store.sin.sin_addr.s_addr = a4p->addr; 2844 break; 2845 } 2846 #endif 2847 default: 2848 goto next_addr; 2849 } 2850 2851 /* see if this address really (still) exists */ 2852 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2853 SCTP_ADDR_NOT_LOCKED); 2854 if (sctp_ifa == NULL) { 2855 /* address doesn't exist anymore */ 2856 int status; 2857 2858 /* are ASCONFs allowed ? */ 2859 if ((sctp_is_feature_on(stcb->sctp_ep, 2860 SCTP_PCB_FLAGS_DO_ASCONF)) && 2861 stcb->asoc.asconf_supported) { 2862 /* queue an ASCONF DEL_IP_ADDRESS */ 2863 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2864 /* 2865 * if queued ok, and in correct state, send 2866 * out the ASCONF. 2867 */ 2868 if (status == 0 && 2869 SCTP_GET_STATE(&stcb->asoc) == 2870 SCTP_STATE_OPEN) { 2871 #ifdef SCTP_TIMER_BASED_ASCONF 2872 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2873 stcb->sctp_ep, stcb, 2874 stcb->asoc.primary_destination); 2875 #else 2876 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2877 #endif 2878 } 2879 } 2880 } 2881 next_addr: 2882 /* 2883 * Sanity check: Make sure the length isn't 0, otherwise 2884 * we'll be stuck in this loop for a long time... 2885 */ 2886 if (SCTP_SIZE32(plen) == 0) { 2887 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2888 plen, ptype); 2889 return; 2890 } 2891 /* get next parameter */ 2892 offset += SCTP_SIZE32(plen); 2893 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2894 return; 2895 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2896 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2897 } /* while */ 2898 } 2899 2900 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2901 /* 2902 * checks to see if a specific address is in the initack address list returns 2903 * 1 if found, 0 if not 2904 */ 2905 static uint32_t 2906 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2907 { 2908 struct sctp_paramhdr tmp_param, *ph; 2909 uint16_t plen, ptype; 2910 2911 #ifdef INET 2912 struct sockaddr_in *sin; 2913 struct sctp_ipv4addr_param *a4p; 2914 struct sctp_ipv6addr_param addr4_store; 2915 2916 #endif 2917 #ifdef INET6 2918 struct sockaddr_in6 *sin6; 2919 struct sctp_ipv6addr_param *a6p; 2920 struct sctp_ipv6addr_param addr6_store; 2921 struct sockaddr_in6 sin6_tmp; 2922 2923 #endif 2924 2925 switch (sa->sa_family) { 2926 #ifdef INET 2927 case AF_INET: 2928 break; 2929 #endif 2930 #ifdef INET6 2931 case AF_INET6: 2932 break; 2933 #endif 2934 default: 2935 return (0); 2936 } 2937 2938 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2939 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2940 /* convert to upper bound */ 2941 length += offset; 2942 2943 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2944 SCTPDBG(SCTP_DEBUG_ASCONF1, 2945 "find_initack_addr: invalid offset?\n"); 2946 return (0); 2947 } 2948 /* go through the addresses in the init-ack */ 2949 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2950 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2951 while (ph != NULL) { 2952 ptype = ntohs(ph->param_type); 2953 plen = ntohs(ph->param_length); 2954 switch (ptype) { 2955 #ifdef INET6 2956 case SCTP_IPV6_ADDRESS: 2957 if (sa->sa_family == AF_INET6) { 2958 /* get the entire IPv6 address param */ 2959 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2960 break; 2961 } 2962 /* get the entire IPv6 address param */ 2963 a6p = (struct sctp_ipv6addr_param *) 2964 sctp_m_getptr(m, offset, 2965 sizeof(struct sctp_ipv6addr_param), 2966 (uint8_t *) & addr6_store); 2967 if (a6p == NULL) { 2968 return (0); 2969 } 2970 sin6 = (struct sockaddr_in6 *)sa; 2971 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2972 /* create a copy and clear scope */ 2973 memcpy(&sin6_tmp, sin6, 2974 sizeof(struct sockaddr_in6)); 2975 sin6 = &sin6_tmp; 2976 in6_clearscope(&sin6->sin6_addr); 2977 } 2978 if (memcmp(&sin6->sin6_addr, a6p->addr, 2979 sizeof(struct in6_addr)) == 0) { 2980 /* found it */ 2981 return (1); 2982 } 2983 } 2984 break; 2985 #endif /* INET6 */ 2986 #ifdef INET 2987 case SCTP_IPV4_ADDRESS: 2988 if (sa->sa_family == AF_INET) { 2989 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2990 break; 2991 } 2992 /* get the entire IPv4 address param */ 2993 a4p = (struct sctp_ipv4addr_param *) 2994 sctp_m_getptr(m, offset, 2995 sizeof(struct sctp_ipv4addr_param), 2996 (uint8_t *) & addr4_store); 2997 if (a4p == NULL) { 2998 return (0); 2999 } 3000 sin = (struct sockaddr_in *)sa; 3001 if (sin->sin_addr.s_addr == a4p->addr) { 3002 /* found it */ 3003 return (1); 3004 } 3005 } 3006 break; 3007 #endif 3008 default: 3009 break; 3010 } 3011 /* get next parameter */ 3012 offset += SCTP_SIZE32(plen); 3013 if (offset + sizeof(struct sctp_paramhdr) > length) { 3014 return (0); 3015 } 3016 ph = (struct sctp_paramhdr *) 3017 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3018 (uint8_t *) & tmp_param); 3019 } /* while */ 3020 /* not found! */ 3021 return (0); 3022 } 3023 3024 /* 3025 * makes sure that the current endpoint local addr list is consistent with 3026 * the new association (eg. subset bound, asconf allowed) adds addresses as 3027 * necessary 3028 */ 3029 static void 3030 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3031 int length, struct sockaddr *init_addr) 3032 { 3033 struct sctp_laddr *laddr; 3034 3035 /* go through the endpoint list */ 3036 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3037 /* be paranoid and validate the laddr */ 3038 if (laddr->ifa == NULL) { 3039 SCTPDBG(SCTP_DEBUG_ASCONF1, 3040 "check_addr_list_ep: laddr->ifa is NULL"); 3041 continue; 3042 } 3043 if (laddr->ifa == NULL) { 3044 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3045 continue; 3046 } 3047 /* do i have it implicitly? */ 3048 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3049 continue; 3050 } 3051 /* check to see if in the init-ack */ 3052 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3053 /* try to add it */ 3054 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3055 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3056 } 3057 } 3058 } 3059 3060 /* 3061 * makes sure that the current kernel address list is consistent with the new 3062 * association (with all addrs bound) adds addresses as necessary 3063 */ 3064 static void 3065 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3066 int length, struct sockaddr *init_addr, 3067 uint16_t local_scope, uint16_t site_scope, 3068 uint16_t ipv4_scope, uint16_t loopback_scope) 3069 { 3070 struct sctp_vrf *vrf = NULL; 3071 struct sctp_ifn *sctp_ifn; 3072 struct sctp_ifa *sctp_ifa; 3073 uint32_t vrf_id; 3074 3075 #ifdef INET 3076 struct sockaddr_in *sin; 3077 3078 #endif 3079 #ifdef INET6 3080 struct sockaddr_in6 *sin6; 3081 3082 #endif 3083 3084 if (stcb) { 3085 vrf_id = stcb->asoc.vrf_id; 3086 } else { 3087 return; 3088 } 3089 SCTP_IPI_ADDR_RLOCK(); 3090 vrf = sctp_find_vrf(vrf_id); 3091 if (vrf == NULL) { 3092 SCTP_IPI_ADDR_RUNLOCK(); 3093 return; 3094 } 3095 /* go through all our known interfaces */ 3096 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3097 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3098 /* skip loopback interface */ 3099 continue; 3100 } 3101 /* go through each interface address */ 3102 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3103 /* do i have it implicitly? */ 3104 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3105 continue; 3106 } 3107 switch (sctp_ifa->address.sa.sa_family) { 3108 #ifdef INET 3109 case AF_INET: 3110 sin = &sctp_ifa->address.sin; 3111 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3112 &sin->sin_addr) != 0) { 3113 continue; 3114 } 3115 if ((ipv4_scope == 0) && 3116 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3117 /* private address not in scope */ 3118 continue; 3119 } 3120 break; 3121 #endif 3122 #ifdef INET6 3123 case AF_INET6: 3124 sin6 = &sctp_ifa->address.sin6; 3125 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3126 &sin6->sin6_addr) != 0) { 3127 continue; 3128 } 3129 if ((local_scope == 0) && 3130 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3131 continue; 3132 } 3133 if ((site_scope == 0) && 3134 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3135 continue; 3136 } 3137 break; 3138 #endif 3139 default: 3140 break; 3141 } 3142 /* check to see if in the init-ack */ 3143 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3144 /* try to add it */ 3145 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3146 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3147 SCTP_ADDR_LOCKED); 3148 } 3149 } /* end foreach ifa */ 3150 } /* end foreach ifn */ 3151 SCTP_IPI_ADDR_RUNLOCK(); 3152 } 3153 3154 /* 3155 * validates an init-ack chunk (from a cookie-echo) with current addresses 3156 * adds addresses from the init-ack into our local address list, if needed 3157 * queues asconf adds/deletes addresses as needed and makes appropriate list 3158 * changes for source address selection m, offset: points to the start of the 3159 * address list in an init-ack chunk length: total length of the address 3160 * params only init_addr: address where my INIT-ACK was sent from 3161 */ 3162 void 3163 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3164 int length, struct sockaddr *init_addr, 3165 uint16_t local_scope, uint16_t site_scope, 3166 uint16_t ipv4_scope, uint16_t loopback_scope) 3167 { 3168 /* process the local addresses in the initack */ 3169 sctp_process_initack_addresses(stcb, m, offset, length); 3170 3171 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3172 /* bound all case */ 3173 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3174 local_scope, site_scope, ipv4_scope, loopback_scope); 3175 } else { 3176 /* subset bound case */ 3177 if (sctp_is_feature_on(stcb->sctp_ep, 3178 SCTP_PCB_FLAGS_DO_ASCONF)) { 3179 /* asconf's allowed */ 3180 sctp_check_address_list_ep(stcb, m, offset, length, 3181 init_addr); 3182 } 3183 /* else, no asconfs allowed, so what we sent is what we get */ 3184 } 3185 } 3186 3187 /* 3188 * sctp_bindx() support 3189 */ 3190 uint32_t 3191 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3192 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3193 { 3194 struct sctp_ifa *ifa; 3195 struct sctp_laddr *laddr, *nladdr; 3196 3197 if (sa->sa_len == 0) { 3198 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3199 return (EINVAL); 3200 } 3201 if (sctp_ifap) { 3202 ifa = sctp_ifap; 3203 } else if (type == SCTP_ADD_IP_ADDRESS) { 3204 /* For an add the address MUST be on the system */ 3205 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3206 } else if (type == SCTP_DEL_IP_ADDRESS) { 3207 /* For a delete we need to find it in the inp */ 3208 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3209 } else { 3210 ifa = NULL; 3211 } 3212 if (ifa != NULL) { 3213 if (type == SCTP_ADD_IP_ADDRESS) { 3214 sctp_add_local_addr_ep(inp, ifa, type); 3215 } else if (type == SCTP_DEL_IP_ADDRESS) { 3216 if (inp->laddr_count < 2) { 3217 /* can't delete the last local address */ 3218 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3219 return (EINVAL); 3220 } 3221 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3222 sctp_nxt_addr) { 3223 if (ifa == laddr->ifa) { 3224 /* Mark in the delete */ 3225 laddr->action = type; 3226 } 3227 } 3228 } 3229 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3230 /* 3231 * There is no need to start the iterator if the inp 3232 * has no associations. 3233 */ 3234 if (type == SCTP_DEL_IP_ADDRESS) { 3235 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3236 if (laddr->ifa == ifa) { 3237 sctp_del_local_addr_ep(inp, ifa); 3238 } 3239 } 3240 } 3241 } else { 3242 struct sctp_asconf_iterator *asc; 3243 struct sctp_laddr *wi; 3244 3245 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3246 sizeof(struct sctp_asconf_iterator), 3247 SCTP_M_ASC_IT); 3248 if (asc == NULL) { 3249 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3250 return (ENOMEM); 3251 } 3252 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3253 if (wi == NULL) { 3254 SCTP_FREE(asc, SCTP_M_ASC_IT); 3255 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3256 return (ENOMEM); 3257 } 3258 LIST_INIT(&asc->list_of_work); 3259 asc->cnt = 1; 3260 SCTP_INCR_LADDR_COUNT(); 3261 wi->ifa = ifa; 3262 wi->action = type; 3263 atomic_add_int(&ifa->refcount, 1); 3264 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3265 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3266 sctp_asconf_iterator_stcb, 3267 sctp_asconf_iterator_ep_end, 3268 SCTP_PCB_ANY_FLAGS, 3269 SCTP_PCB_ANY_FEATURES, 3270 SCTP_ASOC_ANY_STATE, 3271 (void *)asc, 0, 3272 sctp_asconf_iterator_end, inp, 0); 3273 } 3274 return (0); 3275 } else { 3276 /* invalid address! */ 3277 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3278 return (EADDRNOTAVAIL); 3279 } 3280 } 3281 3282 void 3283 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3284 struct sctp_nets *net) 3285 { 3286 struct sctp_asconf_addr *aa; 3287 struct sctp_ifa *sctp_ifap; 3288 struct sctp_asconf_tag_param *vtag; 3289 3290 #ifdef INET 3291 struct sockaddr_in *to; 3292 3293 #endif 3294 #ifdef INET6 3295 struct sockaddr_in6 *to6; 3296 3297 #endif 3298 if (net == NULL) { 3299 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3300 return; 3301 } 3302 if (stcb == NULL) { 3303 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3304 return; 3305 } 3306 /* 3307 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3308 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3309 */ 3310 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3311 SCTP_M_ASC_ADDR); 3312 if (aa == NULL) { 3313 /* didn't get memory */ 3314 SCTPDBG(SCTP_DEBUG_ASCONF1, 3315 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3316 return; 3317 } 3318 aa->special_del = 0; 3319 /* fill in asconf address parameter fields */ 3320 /* top level elements are "networked" during send */ 3321 aa->ifa = NULL; 3322 aa->sent = 0; /* clear sent flag */ 3323 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3324 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3325 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3326 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3327 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3328 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3329 3330 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3331 SCTP_M_ASC_ADDR); 3332 if (aa == NULL) { 3333 /* didn't get memory */ 3334 SCTPDBG(SCTP_DEBUG_ASCONF1, 3335 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3336 return; 3337 } 3338 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3339 /* fill in asconf address parameter fields */ 3340 /* ADD(0.0.0.0) */ 3341 switch (net->ro._l_addr.sa.sa_family) { 3342 #ifdef INET 3343 case AF_INET: 3344 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3345 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3346 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3347 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3348 /* No need to add an address, we are using 0.0.0.0 */ 3349 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3350 break; 3351 #endif 3352 #ifdef INET6 3353 case AF_INET6: 3354 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3355 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3356 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3357 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3358 /* No need to add an address, we are using 0.0.0.0 */ 3359 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3360 break; 3361 #endif 3362 default: 3363 SCTPDBG(SCTP_DEBUG_ASCONF1, 3364 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3365 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3366 return; 3367 } 3368 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3369 SCTP_M_ASC_ADDR); 3370 if (aa == NULL) { 3371 /* didn't get memory */ 3372 SCTPDBG(SCTP_DEBUG_ASCONF1, 3373 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3374 return; 3375 } 3376 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3377 /* fill in asconf address parameter fields */ 3378 /* ADD(0.0.0.0) */ 3379 switch (net->ro._l_addr.sa.sa_family) { 3380 #ifdef INET 3381 case AF_INET: 3382 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3383 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3384 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3385 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3386 /* No need to add an address, we are using 0.0.0.0 */ 3387 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3388 break; 3389 #endif 3390 #ifdef INET6 3391 case AF_INET6: 3392 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3393 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3394 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3395 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3396 /* No need to add an address, we are using 0.0.0.0 */ 3397 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3398 break; 3399 #endif 3400 default: 3401 SCTPDBG(SCTP_DEBUG_ASCONF1, 3402 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3403 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3404 return; 3405 } 3406 /* Now we must hunt the addresses and add all global addresses */ 3407 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3408 struct sctp_vrf *vrf = NULL; 3409 struct sctp_ifn *sctp_ifnp; 3410 uint32_t vrf_id; 3411 3412 vrf_id = stcb->sctp_ep->def_vrf_id; 3413 vrf = sctp_find_vrf(vrf_id); 3414 if (vrf == NULL) { 3415 goto skip_rest; 3416 } 3417 SCTP_IPI_ADDR_RLOCK(); 3418 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3419 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3420 switch (sctp_ifap->address.sa.sa_family) { 3421 #ifdef INET 3422 case AF_INET: 3423 to = &sctp_ifap->address.sin; 3424 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3425 &to->sin_addr) != 0) { 3426 continue; 3427 } 3428 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3429 continue; 3430 } 3431 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3432 continue; 3433 } 3434 break; 3435 #endif 3436 #ifdef INET6 3437 case AF_INET6: 3438 to6 = &sctp_ifap->address.sin6; 3439 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3440 &to6->sin6_addr) != 0) { 3441 continue; 3442 } 3443 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3444 continue; 3445 } 3446 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3447 continue; 3448 } 3449 break; 3450 #endif 3451 default: 3452 continue; 3453 } 3454 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3455 } 3456 } 3457 SCTP_IPI_ADDR_RUNLOCK(); 3458 } else { 3459 struct sctp_laddr *laddr; 3460 3461 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3462 if (laddr->ifa == NULL) { 3463 continue; 3464 } 3465 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3466 /* 3467 * Address being deleted by the system, dont 3468 * list. 3469 */ 3470 continue; 3471 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3472 /* 3473 * Address being deleted on this ep don't 3474 * list. 3475 */ 3476 continue; 3477 } 3478 sctp_ifap = laddr->ifa; 3479 switch (sctp_ifap->address.sa.sa_family) { 3480 #ifdef INET 3481 case AF_INET: 3482 to = &sctp_ifap->address.sin; 3483 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3484 continue; 3485 } 3486 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3487 continue; 3488 } 3489 break; 3490 #endif 3491 #ifdef INET6 3492 case AF_INET6: 3493 to6 = &sctp_ifap->address.sin6; 3494 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3495 continue; 3496 } 3497 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3498 continue; 3499 } 3500 break; 3501 #endif 3502 default: 3503 continue; 3504 } 3505 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3506 } 3507 } 3508 skip_rest: 3509 /* Now we must send the asconf into the queue */ 3510 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3511 } 3512