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 1332 /* see if peer supports ASCONF */ 1333 if (stcb->asoc.asconf_supported == 0) { 1334 return (-1); 1335 } 1336 /* 1337 * if this is deleting the last address from the assoc, mark it as 1338 * pending. 1339 */ 1340 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending && 1341 (sctp_local_addr_count(stcb) < 2)) { 1342 /* set the pending delete info only */ 1343 stcb->asoc.asconf_del_pending = 1; 1344 stcb->asoc.asconf_addr_del_pending = ifa; 1345 atomic_add_int(&ifa->refcount, 1); 1346 SCTPDBG(SCTP_DEBUG_ASCONF2, 1347 "asconf_queue_add: mark delete last address pending\n"); 1348 return (-1); 1349 } 1350 /* queue an asconf parameter */ 1351 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1352 1353 /* 1354 * if this is an add, and there is a delete also pending (i.e. the 1355 * last local address is being changed), queue the pending delete 1356 * too. 1357 */ 1358 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1359 /* queue in the pending delete */ 1360 if (sctp_asconf_queue_mgmt(stcb, 1361 stcb->asoc.asconf_addr_del_pending, 1362 SCTP_DEL_IP_ADDRESS) == 0) { 1363 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1364 pending_delete_queued = 1; 1365 /* clear out the pending delete info */ 1366 stcb->asoc.asconf_del_pending = 0; 1367 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1368 stcb->asoc.asconf_addr_del_pending = NULL; 1369 } 1370 } 1371 if (pending_delete_queued) { 1372 struct sctp_nets *net; 1373 1374 /* 1375 * since we know that the only/last address is now being 1376 * changed in this case, reset the cwnd/rto on all nets to 1377 * start as a new address and path. Also clear the error 1378 * counts to give the assoc the best chance to complete the 1379 * address change. 1380 */ 1381 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1382 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1383 net); 1384 net->RTO = 0; 1385 net->error_count = 0; 1386 } 1387 stcb->asoc.overall_error_count = 0; 1388 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1389 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1390 stcb->asoc.overall_error_count, 1391 0, 1392 SCTP_FROM_SCTP_ASCONF, 1393 __LINE__); 1394 } 1395 /* queue in an advisory set primary too */ 1396 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1397 /* let caller know we should send this out immediately */ 1398 status = 1; 1399 } 1400 return (status); 1401 } 1402 1403 /*- 1404 * add an asconf delete IP address parameter to the queue by sockaddr and 1405 * possibly with no sctp_ifa available. This is only called by the routine 1406 * that checks the addresses in an INIT-ACK against the current address list. 1407 * returns 0 if completed, non-zero if not completed. 1408 * NOTE: if an add is already scheduled (and not yet sent out), simply 1409 * remove it from queue. If a duplicate operation is found, ignore the 1410 * new one. 1411 */ 1412 static int 1413 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1414 { 1415 struct sctp_ifa *ifa; 1416 struct sctp_asconf_addr *aa, *aa_next; 1417 1418 if (stcb == NULL) { 1419 return (-1); 1420 } 1421 /* see if peer supports ASCONF */ 1422 if (stcb->asoc.asconf_supported == 0) { 1423 return (-1); 1424 } 1425 /* make sure the request isn't already in the queue */ 1426 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1427 /* address match? */ 1428 if (sctp_asconf_addr_match(aa, sa) == 0) 1429 continue; 1430 /* is the request already in queue (sent or not) */ 1431 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1432 return (-1); 1433 } 1434 /* is the negative request already in queue, and not sent */ 1435 if (aa->sent == 1) 1436 continue; 1437 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1438 /* add already queued, so remove existing entry */ 1439 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1440 sctp_del_local_addr_restricted(stcb, aa->ifa); 1441 /* free the entry */ 1442 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1443 return (-1); 1444 } 1445 } /* for each aa */ 1446 1447 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1448 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1449 1450 /* adding new request to the queue */ 1451 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1452 SCTP_M_ASC_ADDR); 1453 if (aa == NULL) { 1454 /* didn't get memory */ 1455 SCTPDBG(SCTP_DEBUG_ASCONF1, 1456 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1457 return (-1); 1458 } 1459 aa->special_del = 0; 1460 /* fill in asconf address parameter fields */ 1461 /* top level elements are "networked" during send */ 1462 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1463 aa->ifa = ifa; 1464 if (ifa) 1465 atomic_add_int(&ifa->refcount, 1); 1466 /* correlation_id filled in during send routine later... */ 1467 switch (sa->sa_family) { 1468 #ifdef INET6 1469 case AF_INET6: 1470 { 1471 /* IPv6 address */ 1472 struct sockaddr_in6 *sin6; 1473 1474 sin6 = (struct sockaddr_in6 *)sa; 1475 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1476 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1477 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1478 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1479 sizeof(struct in6_addr)); 1480 break; 1481 } 1482 #endif 1483 #ifdef INET 1484 case AF_INET: 1485 { 1486 /* IPv4 address */ 1487 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1488 1489 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1490 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1491 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1492 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1493 sizeof(struct in_addr)); 1494 break; 1495 } 1496 #endif 1497 default: 1498 /* invalid family! */ 1499 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1500 if (ifa) 1501 sctp_free_ifa(ifa); 1502 return (-1); 1503 } 1504 aa->sent = 0; /* clear sent flag */ 1505 1506 /* delete goes to the back of the queue */ 1507 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1508 1509 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1510 return (0); 1511 } 1512 1513 /* 1514 * find a specific asconf param on our "sent" queue 1515 */ 1516 static struct sctp_asconf_addr * 1517 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1518 { 1519 struct sctp_asconf_addr *aa; 1520 1521 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1522 if (aa->ap.aph.correlation_id == correlation_id && 1523 aa->sent == 1) { 1524 /* found it */ 1525 return (aa); 1526 } 1527 } 1528 /* didn't find it */ 1529 return (NULL); 1530 } 1531 1532 /* 1533 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1534 * notifications based on the error response 1535 */ 1536 static void 1537 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1538 struct sctp_asconf_paramhdr *aph) 1539 { 1540 struct sctp_error_cause *eh; 1541 struct sctp_paramhdr *ph; 1542 uint16_t param_type; 1543 uint16_t error_code; 1544 1545 eh = (struct sctp_error_cause *)(aph + 1); 1546 ph = (struct sctp_paramhdr *)(eh + 1); 1547 /* validate lengths */ 1548 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1549 htons(aph->ph.param_length)) { 1550 /* invalid error cause length */ 1551 SCTPDBG(SCTP_DEBUG_ASCONF1, 1552 "asconf_process_error: cause element too long\n"); 1553 return; 1554 } 1555 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1556 htons(eh->length)) { 1557 /* invalid included TLV length */ 1558 SCTPDBG(SCTP_DEBUG_ASCONF1, 1559 "asconf_process_error: included TLV too long\n"); 1560 return; 1561 } 1562 /* which error code ? */ 1563 error_code = ntohs(eh->code); 1564 param_type = ntohs(aph->ph.param_type); 1565 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1566 switch (error_code) { 1567 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1568 /* we allow ourselves to "try again" for this error */ 1569 break; 1570 default: 1571 /* peer can't handle it... */ 1572 switch (param_type) { 1573 case SCTP_ADD_IP_ADDRESS: 1574 case SCTP_DEL_IP_ADDRESS: 1575 case SCTP_SET_PRIM_ADDR: 1576 break; 1577 default: 1578 break; 1579 } 1580 } 1581 } 1582 1583 /* 1584 * process an asconf queue param. 1585 * aparam: parameter to process, will be removed from the queue. 1586 * flag: 1=success case, 0=failure case 1587 */ 1588 static void 1589 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1590 struct sctp_asconf_addr *aparam, uint32_t flag) 1591 { 1592 uint16_t param_type; 1593 1594 /* process this param */ 1595 param_type = aparam->ap.aph.ph.param_type; 1596 switch (param_type) { 1597 case SCTP_ADD_IP_ADDRESS: 1598 SCTPDBG(SCTP_DEBUG_ASCONF1, 1599 "process_param_ack: added IP address\n"); 1600 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1601 break; 1602 case SCTP_DEL_IP_ADDRESS: 1603 SCTPDBG(SCTP_DEBUG_ASCONF1, 1604 "process_param_ack: deleted IP address\n"); 1605 /* nothing really to do... lists already updated */ 1606 break; 1607 case SCTP_SET_PRIM_ADDR: 1608 SCTPDBG(SCTP_DEBUG_ASCONF1, 1609 "process_param_ack: set primary IP address\n"); 1610 /* nothing to do... peer may start using this addr */ 1611 break; 1612 default: 1613 /* should NEVER happen */ 1614 break; 1615 } 1616 1617 /* remove the param and free it */ 1618 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1619 if (aparam->ifa) 1620 sctp_free_ifa(aparam->ifa); 1621 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1622 } 1623 1624 /* 1625 * cleanup from a bad asconf ack parameter 1626 */ 1627 static void 1628 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1629 { 1630 /* assume peer doesn't really know how to do asconfs */ 1631 /* XXX we could free the pending queue here */ 1632 1633 } 1634 1635 void 1636 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1637 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1638 struct sctp_nets *net, int *abort_no_unlock) 1639 { 1640 struct sctp_association *asoc; 1641 uint32_t serial_num; 1642 uint16_t ack_length; 1643 struct sctp_asconf_paramhdr *aph; 1644 struct sctp_asconf_addr *aa, *aa_next; 1645 uint32_t last_error_id = 0; /* last error correlation id */ 1646 uint32_t id; 1647 struct sctp_asconf_addr *ap; 1648 1649 /* asconf param buffer */ 1650 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1651 1652 /* verify minimum length */ 1653 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1654 SCTPDBG(SCTP_DEBUG_ASCONF1, 1655 "handle_asconf_ack: chunk too small = %xh\n", 1656 ntohs(cp->ch.chunk_length)); 1657 return; 1658 } 1659 asoc = &stcb->asoc; 1660 serial_num = ntohl(cp->serial_number); 1661 1662 /* 1663 * NOTE: we may want to handle this differently- currently, we will 1664 * abort when we get an ack for the expected serial number + 1 (eg. 1665 * we didn't send it), process an ack normally if it is the expected 1666 * serial number, and re-send the previous ack for *ALL* other 1667 * serial numbers 1668 */ 1669 1670 /* 1671 * if the serial number is the next expected, but I didn't send it, 1672 * abort the asoc, since someone probably just hijacked us... 1673 */ 1674 if (serial_num == (asoc->asconf_seq_out + 1)) { 1675 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1676 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED); 1677 *abort_no_unlock = 1; 1678 return; 1679 } 1680 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1681 /* got a duplicate/unexpected ASCONF-ACK */ 1682 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1683 serial_num, asoc->asconf_seq_out_acked + 1); 1684 return; 1685 } 1686 if (serial_num == asoc->asconf_seq_out - 1) { 1687 /* stop our timer */ 1688 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1689 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1690 } 1691 /* process the ASCONF-ACK contents */ 1692 ack_length = ntohs(cp->ch.chunk_length) - 1693 sizeof(struct sctp_asconf_ack_chunk); 1694 offset += sizeof(struct sctp_asconf_ack_chunk); 1695 /* process through all parameters */ 1696 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1697 unsigned int param_length, param_type; 1698 1699 /* get pointer to next asconf parameter */ 1700 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1701 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1702 if (aph == NULL) { 1703 /* can't get an asconf paramhdr */ 1704 sctp_asconf_ack_clear(stcb); 1705 return; 1706 } 1707 param_type = ntohs(aph->ph.param_type); 1708 param_length = ntohs(aph->ph.param_length); 1709 if (param_length > ack_length) { 1710 sctp_asconf_ack_clear(stcb); 1711 return; 1712 } 1713 if (param_length < sizeof(struct sctp_paramhdr)) { 1714 sctp_asconf_ack_clear(stcb); 1715 return; 1716 } 1717 /* get the complete parameter... */ 1718 if (param_length > sizeof(aparam_buf)) { 1719 SCTPDBG(SCTP_DEBUG_ASCONF1, 1720 "param length (%u) larger than buffer size!\n", param_length); 1721 sctp_asconf_ack_clear(stcb); 1722 return; 1723 } 1724 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1725 if (aph == NULL) { 1726 sctp_asconf_ack_clear(stcb); 1727 return; 1728 } 1729 /* correlation_id is transparent to peer, no ntohl needed */ 1730 id = aph->correlation_id; 1731 1732 switch (param_type) { 1733 case SCTP_ERROR_CAUSE_IND: 1734 last_error_id = id; 1735 /* find the corresponding asconf param in our queue */ 1736 ap = sctp_asconf_find_param(stcb, id); 1737 if (ap == NULL) { 1738 /* hmm... can't find this in our queue! */ 1739 break; 1740 } 1741 /* process the parameter, failed flag */ 1742 sctp_asconf_process_param_ack(stcb, ap, 0); 1743 /* process the error response */ 1744 sctp_asconf_process_error(stcb, aph); 1745 break; 1746 case SCTP_SUCCESS_REPORT: 1747 /* find the corresponding asconf param in our queue */ 1748 ap = sctp_asconf_find_param(stcb, id); 1749 if (ap == NULL) { 1750 /* hmm... can't find this in our queue! */ 1751 break; 1752 } 1753 /* process the parameter, success flag */ 1754 sctp_asconf_process_param_ack(stcb, ap, 1); 1755 break; 1756 default: 1757 break; 1758 } /* switch */ 1759 1760 /* update remaining ASCONF-ACK message length to process */ 1761 ack_length -= SCTP_SIZE32(param_length); 1762 if (ack_length <= 0) { 1763 /* no more data in the mbuf chain */ 1764 break; 1765 } 1766 offset += SCTP_SIZE32(param_length); 1767 } /* while */ 1768 1769 /* 1770 * if there are any "sent" params still on the queue, these are 1771 * implicitly "success", or "failed" (if we got an error back) ... 1772 * so process these appropriately 1773 * 1774 * we assume that the correlation_id's are monotonically increasing 1775 * beginning from 1 and that we don't have *that* many outstanding 1776 * at any given time 1777 */ 1778 if (last_error_id == 0) 1779 last_error_id--;/* set to "max" value */ 1780 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1781 if (aa->sent == 1) { 1782 /* 1783 * implicitly successful or failed if correlation_id 1784 * < last_error_id, then success else, failure 1785 */ 1786 if (aa->ap.aph.correlation_id < last_error_id) 1787 sctp_asconf_process_param_ack(stcb, aa, 1); 1788 else 1789 sctp_asconf_process_param_ack(stcb, aa, 0); 1790 } else { 1791 /* 1792 * since we always process in order (FIFO queue) if 1793 * we reach one that hasn't been sent, the rest 1794 * should not have been sent either. so, we're 1795 * done... 1796 */ 1797 break; 1798 } 1799 } 1800 1801 /* update the next sequence number to use */ 1802 asoc->asconf_seq_out_acked++; 1803 /* remove the old ASCONF on our outbound queue */ 1804 sctp_toss_old_asconf(stcb); 1805 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1806 #ifdef SCTP_TIMER_BASED_ASCONF 1807 /* we have more params, so restart our timer */ 1808 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1809 stcb, net); 1810 #else 1811 /* we have more params, so send out more */ 1812 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1813 #endif 1814 } 1815 } 1816 1817 #ifdef INET6 1818 static uint32_t 1819 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1820 { 1821 struct sockaddr_in6 *sin6, *net6; 1822 struct sctp_nets *net; 1823 1824 if (sa->sa_family != AF_INET6) { 1825 /* wrong family */ 1826 return (0); 1827 } 1828 sin6 = (struct sockaddr_in6 *)sa; 1829 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1830 /* not link local address */ 1831 return (0); 1832 } 1833 /* hunt through our destination nets list for this scope_id */ 1834 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1835 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1836 AF_INET6) 1837 continue; 1838 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1839 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1840 continue; 1841 if (sctp_is_same_scope(sin6, net6)) { 1842 /* found one */ 1843 return (1); 1844 } 1845 } 1846 /* didn't find one */ 1847 return (0); 1848 } 1849 1850 #endif 1851 1852 /* 1853 * address management functions 1854 */ 1855 static void 1856 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1857 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1858 { 1859 int status; 1860 1861 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1862 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1863 /* subset bound, no ASCONF allowed case, so ignore */ 1864 return; 1865 } 1866 /* 1867 * note: we know this is not the subset bound, no ASCONF case eg. 1868 * this is boundall or subset bound w/ASCONF allowed 1869 */ 1870 1871 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1872 switch (ifa->address.sa.sa_family) { 1873 #ifdef INET6 1874 case AF_INET6: 1875 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1876 &ifa->address.sin6.sin6_addr) != 0) { 1877 return; 1878 } 1879 break; 1880 #endif 1881 #ifdef INET 1882 case AF_INET: 1883 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1884 &ifa->address.sin.sin_addr) != 0) { 1885 return; 1886 } 1887 break; 1888 #endif 1889 default: 1890 return; 1891 } 1892 #ifdef INET6 1893 /* make sure we're "allowed" to add this type of addr */ 1894 if (ifa->address.sa.sa_family == AF_INET6) { 1895 /* invalid if we're not a v6 endpoint */ 1896 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1897 return; 1898 /* is the v6 addr really valid ? */ 1899 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1900 return; 1901 } 1902 } 1903 #endif 1904 /* put this address on the "pending/do not use yet" list */ 1905 sctp_add_local_addr_restricted(stcb, ifa); 1906 /* 1907 * check address scope if address is out of scope, don't queue 1908 * anything... note: this would leave the address on both inp and 1909 * asoc lists 1910 */ 1911 switch (ifa->address.sa.sa_family) { 1912 #ifdef INET6 1913 case AF_INET6: 1914 { 1915 struct sockaddr_in6 *sin6; 1916 1917 sin6 = &ifa->address.sin6; 1918 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1919 /* we skip unspecifed addresses */ 1920 return; 1921 } 1922 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1923 if (stcb->asoc.scope.local_scope == 0) { 1924 return; 1925 } 1926 /* is it the right link local scope? */ 1927 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1928 return; 1929 } 1930 } 1931 if (stcb->asoc.scope.site_scope == 0 && 1932 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1933 return; 1934 } 1935 break; 1936 } 1937 #endif 1938 #ifdef INET 1939 case AF_INET: 1940 { 1941 struct sockaddr_in *sin; 1942 struct in6pcb *inp6; 1943 1944 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1945 /* invalid if we are a v6 only endpoint */ 1946 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1947 SCTP_IPV6_V6ONLY(inp6)) 1948 return; 1949 1950 sin = &ifa->address.sin; 1951 if (sin->sin_addr.s_addr == 0) { 1952 /* we skip unspecifed addresses */ 1953 return; 1954 } 1955 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1956 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1957 return; 1958 } 1959 break; 1960 } 1961 #endif 1962 default: 1963 /* else, not AF_INET or AF_INET6, so skip */ 1964 return; 1965 } 1966 1967 /* queue an asconf for this address add/delete */ 1968 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1969 /* does the peer do asconf? */ 1970 if (stcb->asoc.asconf_supported) { 1971 /* queue an asconf for this addr */ 1972 status = sctp_asconf_queue_add(stcb, ifa, type); 1973 1974 /* 1975 * if queued ok, and in the open state, send out the 1976 * ASCONF. If in the non-open state, these will be 1977 * sent when the state goes open. 1978 */ 1979 if (status == 0 && 1980 ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 1981 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 1982 #ifdef SCTP_TIMER_BASED_ASCONF 1983 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1984 stcb, stcb->asoc.primary_destination); 1985 #else 1986 sctp_send_asconf(stcb, NULL, addr_locked); 1987 #endif 1988 } 1989 } 1990 } 1991 } 1992 1993 1994 int 1995 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 1996 { 1997 struct sctp_asconf_iterator *asc; 1998 struct sctp_ifa *ifa; 1999 struct sctp_laddr *l; 2000 int cnt_invalid = 0; 2001 2002 asc = (struct sctp_asconf_iterator *)ptr; 2003 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2004 ifa = l->ifa; 2005 switch (ifa->address.sa.sa_family) { 2006 #ifdef INET6 2007 case AF_INET6: 2008 /* invalid if we're not a v6 endpoint */ 2009 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2010 cnt_invalid++; 2011 if (asc->cnt == cnt_invalid) 2012 return (1); 2013 } 2014 break; 2015 #endif 2016 #ifdef INET 2017 case AF_INET: 2018 { 2019 /* invalid if we are a v6 only endpoint */ 2020 struct in6pcb *inp6; 2021 2022 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2023 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2024 SCTP_IPV6_V6ONLY(inp6)) { 2025 cnt_invalid++; 2026 if (asc->cnt == cnt_invalid) 2027 return (1); 2028 } 2029 break; 2030 } 2031 #endif 2032 default: 2033 /* invalid address family */ 2034 cnt_invalid++; 2035 if (asc->cnt == cnt_invalid) 2036 return (1); 2037 } 2038 } 2039 return (0); 2040 } 2041 2042 static int 2043 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2044 { 2045 struct sctp_ifa *ifa; 2046 struct sctp_asconf_iterator *asc; 2047 struct sctp_laddr *laddr, *nladdr, *l; 2048 2049 /* Only for specific case not bound all */ 2050 asc = (struct sctp_asconf_iterator *)ptr; 2051 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2052 ifa = l->ifa; 2053 if (l->action == SCTP_ADD_IP_ADDRESS) { 2054 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2055 sctp_nxt_addr) { 2056 if (laddr->ifa == ifa) { 2057 laddr->action = 0; 2058 break; 2059 } 2060 } 2061 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2062 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2063 /* remove only after all guys are done */ 2064 if (laddr->ifa == ifa) { 2065 sctp_del_local_addr_ep(inp, ifa); 2066 } 2067 } 2068 } 2069 } 2070 return (0); 2071 } 2072 2073 void 2074 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2075 void *ptr, uint32_t val SCTP_UNUSED) 2076 { 2077 struct sctp_asconf_iterator *asc; 2078 struct sctp_ifa *ifa; 2079 struct sctp_laddr *l; 2080 int cnt_invalid = 0; 2081 int type, status; 2082 int num_queued = 0; 2083 2084 asc = (struct sctp_asconf_iterator *)ptr; 2085 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2086 ifa = l->ifa; 2087 type = l->action; 2088 2089 /* address's vrf_id must be the vrf_id of the assoc */ 2090 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2091 continue; 2092 } 2093 /* Same checks again for assoc */ 2094 switch (ifa->address.sa.sa_family) { 2095 #ifdef INET6 2096 case AF_INET6: 2097 { 2098 /* invalid if we're not a v6 endpoint */ 2099 struct sockaddr_in6 *sin6; 2100 2101 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2102 cnt_invalid++; 2103 if (asc->cnt == cnt_invalid) 2104 return; 2105 else 2106 continue; 2107 } 2108 sin6 = &ifa->address.sin6; 2109 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2110 /* we skip unspecifed addresses */ 2111 continue; 2112 } 2113 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2114 &sin6->sin6_addr) != 0) { 2115 continue; 2116 } 2117 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2118 if (stcb->asoc.scope.local_scope == 0) { 2119 continue; 2120 } 2121 /* is it the right link local scope? */ 2122 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2123 continue; 2124 } 2125 } 2126 break; 2127 } 2128 #endif 2129 #ifdef INET 2130 case AF_INET: 2131 { 2132 /* invalid if we are a v6 only endpoint */ 2133 struct in6pcb *inp6; 2134 struct sockaddr_in *sin; 2135 2136 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2137 /* invalid if we are a v6 only endpoint */ 2138 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2139 SCTP_IPV6_V6ONLY(inp6)) 2140 continue; 2141 2142 sin = &ifa->address.sin; 2143 if (sin->sin_addr.s_addr == 0) { 2144 /* we skip unspecifed addresses */ 2145 continue; 2146 } 2147 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2148 &sin->sin_addr) != 0) { 2149 continue; 2150 } 2151 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2152 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2153 continue; 2154 } 2155 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2156 SCTP_IPV6_V6ONLY(inp6)) { 2157 cnt_invalid++; 2158 if (asc->cnt == cnt_invalid) 2159 return; 2160 else 2161 continue; 2162 } 2163 break; 2164 } 2165 #endif 2166 default: 2167 /* invalid address family */ 2168 cnt_invalid++; 2169 if (asc->cnt == cnt_invalid) 2170 return; 2171 else 2172 continue; 2173 break; 2174 } 2175 2176 if (type == SCTP_ADD_IP_ADDRESS) { 2177 /* prevent this address from being used as a source */ 2178 sctp_add_local_addr_restricted(stcb, ifa); 2179 } else if (type == SCTP_DEL_IP_ADDRESS) { 2180 struct sctp_nets *net; 2181 2182 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2183 sctp_rtentry_t *rt; 2184 2185 /* delete this address if cached */ 2186 if (net->ro._s_addr == ifa) { 2187 sctp_free_ifa(net->ro._s_addr); 2188 net->ro._s_addr = NULL; 2189 net->src_addr_selected = 0; 2190 rt = net->ro.ro_rt; 2191 if (rt) { 2192 RTFREE(rt); 2193 net->ro.ro_rt = NULL; 2194 } 2195 /* 2196 * Now we deleted our src address, 2197 * should we not also now reset the 2198 * cwnd/rto to start as if its a new 2199 * address? 2200 */ 2201 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2202 net->RTO = 0; 2203 2204 } 2205 } 2206 } else if (type == SCTP_SET_PRIM_ADDR) { 2207 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2208 /* must validate the ifa is in the ep */ 2209 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2210 continue; 2211 } 2212 } else { 2213 /* Need to check scopes for this guy */ 2214 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2215 continue; 2216 } 2217 } 2218 } 2219 /* queue an asconf for this address add/delete */ 2220 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2221 stcb->asoc.asconf_supported == 1) { 2222 /* queue an asconf for this addr */ 2223 status = sctp_asconf_queue_add(stcb, ifa, type); 2224 /* 2225 * if queued ok, and in the open state, update the 2226 * count of queued params. If in the non-open 2227 * state, these get sent when the assoc goes open. 2228 */ 2229 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2230 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2231 if (status >= 0) { 2232 num_queued++; 2233 } 2234 } 2235 } 2236 } 2237 /* 2238 * If we have queued params in the open state, send out an ASCONF. 2239 */ 2240 if (num_queued > 0) { 2241 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2242 } 2243 } 2244 2245 void 2246 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2247 { 2248 struct sctp_asconf_iterator *asc; 2249 struct sctp_ifa *ifa; 2250 struct sctp_laddr *l, *nl; 2251 2252 asc = (struct sctp_asconf_iterator *)ptr; 2253 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2254 ifa = l->ifa; 2255 if (l->action == SCTP_ADD_IP_ADDRESS) { 2256 /* Clear the defer use flag */ 2257 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2258 } 2259 sctp_free_ifa(ifa); 2260 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2261 SCTP_DECR_LADDR_COUNT(); 2262 } 2263 SCTP_FREE(asc, SCTP_M_ASC_IT); 2264 } 2265 2266 /* 2267 * sa is the sockaddr to ask the peer to set primary to. 2268 * returns: 0 = completed, -1 = error 2269 */ 2270 int32_t 2271 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2272 { 2273 uint32_t vrf_id; 2274 struct sctp_ifa *ifa; 2275 2276 /* find the ifa for the desired set primary */ 2277 vrf_id = stcb->asoc.vrf_id; 2278 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2279 if (ifa == NULL) { 2280 /* Invalid address */ 2281 return (-1); 2282 } 2283 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2284 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2285 /* set primary queuing succeeded */ 2286 SCTPDBG(SCTP_DEBUG_ASCONF1, 2287 "set_primary_ip_address_sa: queued on tcb=%p, ", 2288 (void *)stcb); 2289 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2290 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2291 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2292 #ifdef SCTP_TIMER_BASED_ASCONF 2293 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2294 stcb->sctp_ep, stcb, 2295 stcb->asoc.primary_destination); 2296 #else 2297 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2298 #endif 2299 } 2300 } else { 2301 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2302 (void *)stcb); 2303 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2304 return (-1); 2305 } 2306 return (0); 2307 } 2308 2309 void 2310 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2311 { 2312 struct sctp_inpcb *inp; 2313 2314 /* go through all our PCB's */ 2315 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2316 struct sctp_tcb *stcb; 2317 2318 /* process for all associations for this endpoint */ 2319 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2320 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2321 if (!sctp_asconf_queue_add(stcb, ifa, 2322 SCTP_SET_PRIM_ADDR)) { 2323 /* set primary queuing succeeded */ 2324 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2325 (void *)stcb); 2326 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2327 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2328 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2329 #ifdef SCTP_TIMER_BASED_ASCONF 2330 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2331 stcb->sctp_ep, stcb, 2332 stcb->asoc.primary_destination); 2333 #else 2334 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2335 #endif 2336 } 2337 } 2338 } /* for each stcb */ 2339 } /* for each inp */ 2340 } 2341 2342 int 2343 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2344 { 2345 struct sctp_tmit_chunk *chk, *nchk; 2346 unsigned int offset, asconf_limit; 2347 struct sctp_asconf_chunk *acp; 2348 struct sctp_asconf_paramhdr *aph; 2349 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2350 struct sctp_paramhdr *ph; 2351 int add_cnt, del_cnt; 2352 uint16_t last_param_type; 2353 2354 add_cnt = del_cnt = 0; 2355 last_param_type = 0; 2356 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2357 if (chk->data == NULL) { 2358 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2359 continue; 2360 } 2361 offset = 0; 2362 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2363 offset += sizeof(struct sctp_asconf_chunk); 2364 asconf_limit = ntohs(acp->ch.chunk_length); 2365 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2366 if (ph == NULL) { 2367 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2368 continue; 2369 } 2370 offset += ntohs(ph->param_length); 2371 2372 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2373 if (aph == NULL) { 2374 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2375 continue; 2376 } 2377 while (aph != NULL) { 2378 unsigned int param_length, param_type; 2379 2380 param_type = ntohs(aph->ph.param_type); 2381 param_length = ntohs(aph->ph.param_length); 2382 if (offset + param_length > asconf_limit) { 2383 /* parameter goes beyond end of chunk! */ 2384 break; 2385 } 2386 if (param_length > sizeof(aparam_buf)) { 2387 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2388 break; 2389 } 2390 if (param_length <= sizeof(struct sctp_paramhdr)) { 2391 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2392 break; 2393 } 2394 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2395 if (aph == NULL) { 2396 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2397 break; 2398 } 2399 ph = (struct sctp_paramhdr *)(aph + 1); 2400 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2401 switch (param_type) { 2402 case SCTP_ADD_IP_ADDRESS: 2403 add_cnt++; 2404 break; 2405 case SCTP_DEL_IP_ADDRESS: 2406 del_cnt++; 2407 break; 2408 default: 2409 break; 2410 } 2411 last_param_type = param_type; 2412 } 2413 offset += SCTP_SIZE32(param_length); 2414 if (offset >= asconf_limit) { 2415 /* no more data in the mbuf chain */ 2416 break; 2417 } 2418 /* get pointer to next asconf param */ 2419 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2420 } 2421 } 2422 2423 /* 2424 * we want to find the sequences which consist of ADD -> DEL -> ADD 2425 * or DEL -> ADD 2426 */ 2427 if (add_cnt > del_cnt || 2428 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2429 return (1); 2430 } 2431 return (0); 2432 } 2433 2434 static struct sockaddr * 2435 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2436 { 2437 struct sctp_vrf *vrf = NULL; 2438 struct sctp_ifn *sctp_ifn; 2439 struct sctp_ifa *sctp_ifa; 2440 2441 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2442 SCTP_IPI_ADDR_RLOCK(); 2443 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2444 if (vrf == NULL) { 2445 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2446 SCTP_IPI_ADDR_RUNLOCK(); 2447 return (NULL); 2448 } 2449 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2450 if (stcb->asoc.scope.loopback_scope == 0 && 2451 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2452 /* Skip if loopback_scope not set */ 2453 continue; 2454 } 2455 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2456 switch (sctp_ifa->address.sa.sa_family) { 2457 #ifdef INET 2458 case AF_INET: 2459 if (stcb->asoc.scope.ipv4_addr_legal) { 2460 struct sockaddr_in *sin; 2461 2462 sin = &sctp_ifa->address.sin; 2463 if (sin->sin_addr.s_addr == 0) { 2464 /* skip unspecifed addresses */ 2465 continue; 2466 } 2467 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2468 &sin->sin_addr) != 0) { 2469 continue; 2470 } 2471 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2472 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2473 continue; 2474 2475 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2476 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2477 continue; 2478 /* 2479 * found a valid local v4 address to 2480 * use 2481 */ 2482 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2483 SCTP_IPI_ADDR_RUNLOCK(); 2484 return (&sctp_ifa->address.sa); 2485 } 2486 break; 2487 #endif 2488 #ifdef INET6 2489 case AF_INET6: 2490 if (stcb->asoc.scope.ipv6_addr_legal) { 2491 struct sockaddr_in6 *sin6; 2492 2493 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2494 continue; 2495 } 2496 sin6 = &sctp_ifa->address.sin6; 2497 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2498 /* 2499 * we skip unspecifed 2500 * addresses 2501 */ 2502 continue; 2503 } 2504 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2505 &sin6->sin6_addr) != 0) { 2506 continue; 2507 } 2508 if (stcb->asoc.scope.local_scope == 0 && 2509 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2510 continue; 2511 if (stcb->asoc.scope.site_scope == 0 && 2512 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2513 continue; 2514 2515 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2516 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2517 continue; 2518 /* 2519 * found a valid local v6 address to 2520 * use 2521 */ 2522 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2523 SCTP_IPI_ADDR_RUNLOCK(); 2524 return (&sctp_ifa->address.sa); 2525 } 2526 break; 2527 #endif 2528 default: 2529 break; 2530 } 2531 } 2532 } 2533 /* no valid addresses found */ 2534 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2535 SCTP_IPI_ADDR_RUNLOCK(); 2536 return (NULL); 2537 } 2538 2539 static struct sockaddr * 2540 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2541 { 2542 struct sctp_laddr *laddr; 2543 2544 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2545 if (laddr->ifa == NULL) { 2546 continue; 2547 } 2548 /* is the address restricted ? */ 2549 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2550 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2551 continue; 2552 2553 /* found a valid local address to use */ 2554 return (&laddr->ifa->address.sa); 2555 } 2556 /* no valid addresses found */ 2557 return (NULL); 2558 } 2559 2560 /* 2561 * builds an ASCONF chunk from queued ASCONF params. 2562 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2563 */ 2564 struct mbuf * 2565 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2566 { 2567 struct mbuf *m_asconf, *m_asconf_chk; 2568 struct sctp_asconf_addr *aa; 2569 struct sctp_asconf_chunk *acp; 2570 struct sctp_asconf_paramhdr *aph; 2571 struct sctp_asconf_addr_param *aap; 2572 uint32_t p_length; 2573 uint32_t correlation_id = 1; /* 0 is reserved... */ 2574 caddr_t ptr, lookup_ptr; 2575 uint8_t lookup_used = 0; 2576 2577 /* are there any asconf params to send? */ 2578 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2579 if (aa->sent == 0) 2580 break; 2581 } 2582 if (aa == NULL) 2583 return (NULL); 2584 2585 /* 2586 * get a chunk header mbuf and a cluster for the asconf params since 2587 * it's simpler to fill in the asconf chunk header lookup address on 2588 * the fly 2589 */ 2590 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2591 if (m_asconf_chk == NULL) { 2592 /* no mbuf's */ 2593 SCTPDBG(SCTP_DEBUG_ASCONF1, 2594 "compose_asconf: couldn't get chunk mbuf!\n"); 2595 return (NULL); 2596 } 2597 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2598 if (m_asconf == NULL) { 2599 /* no mbuf's */ 2600 SCTPDBG(SCTP_DEBUG_ASCONF1, 2601 "compose_asconf: couldn't get mbuf!\n"); 2602 sctp_m_freem(m_asconf_chk); 2603 return (NULL); 2604 } 2605 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2606 SCTP_BUF_LEN(m_asconf) = 0; 2607 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2608 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2609 /* save pointers to lookup address and asconf params */ 2610 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2611 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2612 2613 /* fill in chunk header info */ 2614 acp->ch.chunk_type = SCTP_ASCONF; 2615 acp->ch.chunk_flags = 0; 2616 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2617 stcb->asoc.asconf_seq_out++; 2618 2619 /* add parameters... up to smallest MTU allowed */ 2620 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2621 if (aa->sent) 2622 continue; 2623 /* get the parameter length */ 2624 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2625 /* will it fit in current chunk? */ 2626 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2627 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2628 /* won't fit, so we're done with this chunk */ 2629 break; 2630 } 2631 /* assign (and store) a correlation id */ 2632 aa->ap.aph.correlation_id = correlation_id++; 2633 2634 /* 2635 * fill in address if we're doing a delete this is a simple 2636 * way for us to fill in the correlation address, which 2637 * should only be used by the peer if we're deleting our 2638 * source address and adding a new address (e.g. renumbering 2639 * case) 2640 */ 2641 if (lookup_used == 0 && 2642 (aa->special_del == 0) && 2643 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2644 struct sctp_ipv6addr_param *lookup; 2645 uint16_t p_size, addr_size; 2646 2647 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2648 lookup->ph.param_type = 2649 htons(aa->ap.addrp.ph.param_type); 2650 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2651 /* copy IPv6 address */ 2652 p_size = sizeof(struct sctp_ipv6addr_param); 2653 addr_size = sizeof(struct in6_addr); 2654 } else { 2655 /* copy IPv4 address */ 2656 p_size = sizeof(struct sctp_ipv4addr_param); 2657 addr_size = sizeof(struct in_addr); 2658 } 2659 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2660 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2661 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2662 lookup_used = 1; 2663 } 2664 /* copy into current space */ 2665 memcpy(ptr, &aa->ap, p_length); 2666 2667 /* network elements and update lengths */ 2668 aph = (struct sctp_asconf_paramhdr *)ptr; 2669 aap = (struct sctp_asconf_addr_param *)ptr; 2670 /* correlation_id is transparent to peer, no htonl needed */ 2671 aph->ph.param_type = htons(aph->ph.param_type); 2672 aph->ph.param_length = htons(aph->ph.param_length); 2673 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2674 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2675 2676 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2677 ptr += SCTP_SIZE32(p_length); 2678 2679 /* 2680 * these params are removed off the pending list upon 2681 * getting an ASCONF-ACK back from the peer, just set flag 2682 */ 2683 aa->sent = 1; 2684 } 2685 /* check to see if the lookup addr has been populated yet */ 2686 if (lookup_used == 0) { 2687 /* NOTE: if the address param is optional, can skip this... */ 2688 /* add any valid (existing) address... */ 2689 struct sctp_ipv6addr_param *lookup; 2690 uint16_t p_size, addr_size; 2691 struct sockaddr *found_addr; 2692 caddr_t addr_ptr; 2693 2694 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2695 found_addr = sctp_find_valid_localaddr(stcb, 2696 addr_locked); 2697 else 2698 found_addr = sctp_find_valid_localaddr_ep(stcb); 2699 2700 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2701 if (found_addr != NULL) { 2702 switch (found_addr->sa_family) { 2703 #ifdef INET6 2704 case AF_INET6: 2705 /* copy IPv6 address */ 2706 lookup->ph.param_type = 2707 htons(SCTP_IPV6_ADDRESS); 2708 p_size = sizeof(struct sctp_ipv6addr_param); 2709 addr_size = sizeof(struct in6_addr); 2710 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2711 found_addr)->sin6_addr; 2712 break; 2713 #endif 2714 #ifdef INET 2715 case AF_INET: 2716 /* copy IPv4 address */ 2717 lookup->ph.param_type = 2718 htons(SCTP_IPV4_ADDRESS); 2719 p_size = sizeof(struct sctp_ipv4addr_param); 2720 addr_size = sizeof(struct in_addr); 2721 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2722 found_addr)->sin_addr; 2723 break; 2724 #endif 2725 default: 2726 p_size = 0; 2727 addr_size = 0; 2728 addr_ptr = NULL; 2729 break; 2730 } 2731 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2732 memcpy(lookup->addr, addr_ptr, addr_size); 2733 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2734 } else { 2735 /* uh oh... don't have any address?? */ 2736 SCTPDBG(SCTP_DEBUG_ASCONF1, 2737 "compose_asconf: no lookup addr!\n"); 2738 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2739 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2740 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2741 bzero(lookup->addr, sizeof(struct in_addr)); 2742 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2743 } 2744 } 2745 /* chain it all together */ 2746 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2747 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2748 acp->ch.chunk_length = htons(*retlen); 2749 2750 return (m_asconf_chk); 2751 } 2752 2753 /* 2754 * section to handle address changes before an association is up eg. changes 2755 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2756 */ 2757 2758 /* 2759 * processes the (local) addresses in the INIT-ACK chunk 2760 */ 2761 static void 2762 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2763 unsigned int offset, unsigned int length) 2764 { 2765 struct sctp_paramhdr tmp_param, *ph; 2766 uint16_t plen, ptype; 2767 struct sctp_ifa *sctp_ifa; 2768 union sctp_sockstore store; 2769 2770 #ifdef INET6 2771 struct sctp_ipv6addr_param addr6_store; 2772 2773 #endif 2774 #ifdef INET 2775 struct sctp_ipv4addr_param addr4_store; 2776 2777 #endif 2778 2779 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2780 if (stcb == NULL) /* Un-needed check for SA */ 2781 return; 2782 2783 /* convert to upper bound */ 2784 length += offset; 2785 2786 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2787 return; 2788 } 2789 /* go through the addresses in the init-ack */ 2790 ph = (struct sctp_paramhdr *) 2791 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2792 (uint8_t *) & tmp_param); 2793 while (ph != NULL) { 2794 ptype = ntohs(ph->param_type); 2795 plen = ntohs(ph->param_length); 2796 switch (ptype) { 2797 #ifdef INET6 2798 case SCTP_IPV6_ADDRESS: 2799 { 2800 struct sctp_ipv6addr_param *a6p; 2801 2802 /* get the entire IPv6 address param */ 2803 a6p = (struct sctp_ipv6addr_param *) 2804 sctp_m_getptr(m, offset, 2805 sizeof(struct sctp_ipv6addr_param), 2806 (uint8_t *) & addr6_store); 2807 if (plen != sizeof(struct sctp_ipv6addr_param) || 2808 a6p == NULL) { 2809 return; 2810 } 2811 memset(&store, 0, sizeof(union sctp_sockstore)); 2812 store.sin6.sin6_family = AF_INET6; 2813 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2814 store.sin6.sin6_port = stcb->rport; 2815 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2816 break; 2817 } 2818 #endif 2819 #ifdef INET 2820 case SCTP_IPV4_ADDRESS: 2821 { 2822 struct sctp_ipv4addr_param *a4p; 2823 2824 /* get the entire IPv4 address param */ 2825 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2826 sizeof(struct sctp_ipv4addr_param), 2827 (uint8_t *) & addr4_store); 2828 if (plen != sizeof(struct sctp_ipv4addr_param) || 2829 a4p == NULL) { 2830 return; 2831 } 2832 memset(&store, 0, sizeof(union sctp_sockstore)); 2833 store.sin.sin_family = AF_INET; 2834 store.sin.sin_len = sizeof(struct sockaddr_in); 2835 store.sin.sin_port = stcb->rport; 2836 store.sin.sin_addr.s_addr = a4p->addr; 2837 break; 2838 } 2839 #endif 2840 default: 2841 goto next_addr; 2842 } 2843 2844 /* see if this address really (still) exists */ 2845 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2846 SCTP_ADDR_NOT_LOCKED); 2847 if (sctp_ifa == NULL) { 2848 /* address doesn't exist anymore */ 2849 int status; 2850 2851 /* are ASCONFs allowed ? */ 2852 if ((sctp_is_feature_on(stcb->sctp_ep, 2853 SCTP_PCB_FLAGS_DO_ASCONF)) && 2854 stcb->asoc.asconf_supported) { 2855 /* queue an ASCONF DEL_IP_ADDRESS */ 2856 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2857 /* 2858 * if queued ok, and in correct state, send 2859 * out the ASCONF. 2860 */ 2861 if (status == 0 && 2862 SCTP_GET_STATE(&stcb->asoc) == 2863 SCTP_STATE_OPEN) { 2864 #ifdef SCTP_TIMER_BASED_ASCONF 2865 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2866 stcb->sctp_ep, stcb, 2867 stcb->asoc.primary_destination); 2868 #else 2869 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2870 #endif 2871 } 2872 } 2873 } 2874 next_addr: 2875 /* 2876 * Sanity check: Make sure the length isn't 0, otherwise 2877 * we'll be stuck in this loop for a long time... 2878 */ 2879 if (SCTP_SIZE32(plen) == 0) { 2880 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2881 plen, ptype); 2882 return; 2883 } 2884 /* get next parameter */ 2885 offset += SCTP_SIZE32(plen); 2886 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2887 return; 2888 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2889 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2890 } /* while */ 2891 } 2892 2893 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2894 /* 2895 * checks to see if a specific address is in the initack address list returns 2896 * 1 if found, 0 if not 2897 */ 2898 static uint32_t 2899 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2900 { 2901 struct sctp_paramhdr tmp_param, *ph; 2902 uint16_t plen, ptype; 2903 2904 #ifdef INET 2905 struct sockaddr_in *sin; 2906 struct sctp_ipv4addr_param *a4p; 2907 struct sctp_ipv6addr_param addr4_store; 2908 2909 #endif 2910 #ifdef INET6 2911 struct sockaddr_in6 *sin6; 2912 struct sctp_ipv6addr_param *a6p; 2913 struct sctp_ipv6addr_param addr6_store; 2914 struct sockaddr_in6 sin6_tmp; 2915 2916 #endif 2917 2918 switch (sa->sa_family) { 2919 #ifdef INET 2920 case AF_INET: 2921 break; 2922 #endif 2923 #ifdef INET6 2924 case AF_INET6: 2925 break; 2926 #endif 2927 default: 2928 return (0); 2929 } 2930 2931 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2932 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2933 /* convert to upper bound */ 2934 length += offset; 2935 2936 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2937 SCTPDBG(SCTP_DEBUG_ASCONF1, 2938 "find_initack_addr: invalid offset?\n"); 2939 return (0); 2940 } 2941 /* go through the addresses in the init-ack */ 2942 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2943 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2944 while (ph != NULL) { 2945 ptype = ntohs(ph->param_type); 2946 plen = ntohs(ph->param_length); 2947 switch (ptype) { 2948 #ifdef INET6 2949 case SCTP_IPV6_ADDRESS: 2950 if (sa->sa_family == AF_INET6) { 2951 /* get the entire IPv6 address param */ 2952 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2953 break; 2954 } 2955 /* get the entire IPv6 address param */ 2956 a6p = (struct sctp_ipv6addr_param *) 2957 sctp_m_getptr(m, offset, 2958 sizeof(struct sctp_ipv6addr_param), 2959 (uint8_t *) & addr6_store); 2960 if (a6p == NULL) { 2961 return (0); 2962 } 2963 sin6 = (struct sockaddr_in6 *)sa; 2964 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2965 /* create a copy and clear scope */ 2966 memcpy(&sin6_tmp, sin6, 2967 sizeof(struct sockaddr_in6)); 2968 sin6 = &sin6_tmp; 2969 in6_clearscope(&sin6->sin6_addr); 2970 } 2971 if (memcmp(&sin6->sin6_addr, a6p->addr, 2972 sizeof(struct in6_addr)) == 0) { 2973 /* found it */ 2974 return (1); 2975 } 2976 } 2977 break; 2978 #endif /* INET6 */ 2979 #ifdef INET 2980 case SCTP_IPV4_ADDRESS: 2981 if (sa->sa_family == AF_INET) { 2982 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2983 break; 2984 } 2985 /* get the entire IPv4 address param */ 2986 a4p = (struct sctp_ipv4addr_param *) 2987 sctp_m_getptr(m, offset, 2988 sizeof(struct sctp_ipv4addr_param), 2989 (uint8_t *) & addr4_store); 2990 if (a4p == NULL) { 2991 return (0); 2992 } 2993 sin = (struct sockaddr_in *)sa; 2994 if (sin->sin_addr.s_addr == a4p->addr) { 2995 /* found it */ 2996 return (1); 2997 } 2998 } 2999 break; 3000 #endif 3001 default: 3002 break; 3003 } 3004 /* get next parameter */ 3005 offset += SCTP_SIZE32(plen); 3006 if (offset + sizeof(struct sctp_paramhdr) > length) { 3007 return (0); 3008 } 3009 ph = (struct sctp_paramhdr *) 3010 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3011 (uint8_t *) & tmp_param); 3012 } /* while */ 3013 /* not found! */ 3014 return (0); 3015 } 3016 3017 /* 3018 * makes sure that the current endpoint local addr list is consistent with 3019 * the new association (eg. subset bound, asconf allowed) adds addresses as 3020 * necessary 3021 */ 3022 static void 3023 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3024 int length, struct sockaddr *init_addr) 3025 { 3026 struct sctp_laddr *laddr; 3027 3028 /* go through the endpoint list */ 3029 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3030 /* be paranoid and validate the laddr */ 3031 if (laddr->ifa == NULL) { 3032 SCTPDBG(SCTP_DEBUG_ASCONF1, 3033 "check_addr_list_ep: laddr->ifa is NULL"); 3034 continue; 3035 } 3036 if (laddr->ifa == NULL) { 3037 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3038 continue; 3039 } 3040 /* do i have it implicitly? */ 3041 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3042 continue; 3043 } 3044 /* check to see if in the init-ack */ 3045 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3046 /* try to add it */ 3047 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3048 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3049 } 3050 } 3051 } 3052 3053 /* 3054 * makes sure that the current kernel address list is consistent with the new 3055 * association (with all addrs bound) adds addresses as necessary 3056 */ 3057 static void 3058 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3059 int length, struct sockaddr *init_addr, 3060 uint16_t local_scope, uint16_t site_scope, 3061 uint16_t ipv4_scope, uint16_t loopback_scope) 3062 { 3063 struct sctp_vrf *vrf = NULL; 3064 struct sctp_ifn *sctp_ifn; 3065 struct sctp_ifa *sctp_ifa; 3066 uint32_t vrf_id; 3067 3068 #ifdef INET 3069 struct sockaddr_in *sin; 3070 3071 #endif 3072 #ifdef INET6 3073 struct sockaddr_in6 *sin6; 3074 3075 #endif 3076 3077 if (stcb) { 3078 vrf_id = stcb->asoc.vrf_id; 3079 } else { 3080 return; 3081 } 3082 SCTP_IPI_ADDR_RLOCK(); 3083 vrf = sctp_find_vrf(vrf_id); 3084 if (vrf == NULL) { 3085 SCTP_IPI_ADDR_RUNLOCK(); 3086 return; 3087 } 3088 /* go through all our known interfaces */ 3089 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3090 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3091 /* skip loopback interface */ 3092 continue; 3093 } 3094 /* go through each interface address */ 3095 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3096 /* do i have it implicitly? */ 3097 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3098 continue; 3099 } 3100 switch (sctp_ifa->address.sa.sa_family) { 3101 #ifdef INET 3102 case AF_INET: 3103 sin = &sctp_ifa->address.sin; 3104 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3105 &sin->sin_addr) != 0) { 3106 continue; 3107 } 3108 if ((ipv4_scope == 0) && 3109 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3110 /* private address not in scope */ 3111 continue; 3112 } 3113 break; 3114 #endif 3115 #ifdef INET6 3116 case AF_INET6: 3117 sin6 = &sctp_ifa->address.sin6; 3118 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3119 &sin6->sin6_addr) != 0) { 3120 continue; 3121 } 3122 if ((local_scope == 0) && 3123 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3124 continue; 3125 } 3126 if ((site_scope == 0) && 3127 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3128 continue; 3129 } 3130 break; 3131 #endif 3132 default: 3133 break; 3134 } 3135 /* check to see if in the init-ack */ 3136 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3137 /* try to add it */ 3138 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3139 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3140 SCTP_ADDR_LOCKED); 3141 } 3142 } /* end foreach ifa */ 3143 } /* end foreach ifn */ 3144 SCTP_IPI_ADDR_RUNLOCK(); 3145 } 3146 3147 /* 3148 * validates an init-ack chunk (from a cookie-echo) with current addresses 3149 * adds addresses from the init-ack into our local address list, if needed 3150 * queues asconf adds/deletes addresses as needed and makes appropriate list 3151 * changes for source address selection m, offset: points to the start of the 3152 * address list in an init-ack chunk length: total length of the address 3153 * params only init_addr: address where my INIT-ACK was sent from 3154 */ 3155 void 3156 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3157 int length, struct sockaddr *init_addr, 3158 uint16_t local_scope, uint16_t site_scope, 3159 uint16_t ipv4_scope, uint16_t loopback_scope) 3160 { 3161 /* process the local addresses in the initack */ 3162 sctp_process_initack_addresses(stcb, m, offset, length); 3163 3164 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3165 /* bound all case */ 3166 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3167 local_scope, site_scope, ipv4_scope, loopback_scope); 3168 } else { 3169 /* subset bound case */ 3170 if (sctp_is_feature_on(stcb->sctp_ep, 3171 SCTP_PCB_FLAGS_DO_ASCONF)) { 3172 /* asconf's allowed */ 3173 sctp_check_address_list_ep(stcb, m, offset, length, 3174 init_addr); 3175 } 3176 /* else, no asconfs allowed, so what we sent is what we get */ 3177 } 3178 } 3179 3180 /* 3181 * sctp_bindx() support 3182 */ 3183 uint32_t 3184 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3185 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3186 { 3187 struct sctp_ifa *ifa; 3188 struct sctp_laddr *laddr, *nladdr; 3189 3190 if (sa->sa_len == 0) { 3191 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3192 return (EINVAL); 3193 } 3194 if (sctp_ifap) { 3195 ifa = sctp_ifap; 3196 } else if (type == SCTP_ADD_IP_ADDRESS) { 3197 /* For an add the address MUST be on the system */ 3198 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3199 } else if (type == SCTP_DEL_IP_ADDRESS) { 3200 /* For a delete we need to find it in the inp */ 3201 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3202 } else { 3203 ifa = NULL; 3204 } 3205 if (ifa != NULL) { 3206 if (type == SCTP_ADD_IP_ADDRESS) { 3207 sctp_add_local_addr_ep(inp, ifa, type); 3208 } else if (type == SCTP_DEL_IP_ADDRESS) { 3209 if (inp->laddr_count < 2) { 3210 /* can't delete the last local address */ 3211 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3212 return (EINVAL); 3213 } 3214 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3215 sctp_nxt_addr) { 3216 if (ifa == laddr->ifa) { 3217 /* Mark in the delete */ 3218 laddr->action = type; 3219 } 3220 } 3221 } 3222 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3223 /* 3224 * There is no need to start the iterator if the inp 3225 * has no associations. 3226 */ 3227 if (type == SCTP_DEL_IP_ADDRESS) { 3228 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3229 if (laddr->ifa == ifa) { 3230 sctp_del_local_addr_ep(inp, ifa); 3231 } 3232 } 3233 } 3234 } else { 3235 struct sctp_asconf_iterator *asc; 3236 struct sctp_laddr *wi; 3237 3238 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3239 sizeof(struct sctp_asconf_iterator), 3240 SCTP_M_ASC_IT); 3241 if (asc == NULL) { 3242 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3243 return (ENOMEM); 3244 } 3245 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3246 if (wi == NULL) { 3247 SCTP_FREE(asc, SCTP_M_ASC_IT); 3248 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3249 return (ENOMEM); 3250 } 3251 LIST_INIT(&asc->list_of_work); 3252 asc->cnt = 1; 3253 SCTP_INCR_LADDR_COUNT(); 3254 wi->ifa = ifa; 3255 wi->action = type; 3256 atomic_add_int(&ifa->refcount, 1); 3257 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3258 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3259 sctp_asconf_iterator_stcb, 3260 sctp_asconf_iterator_ep_end, 3261 SCTP_PCB_ANY_FLAGS, 3262 SCTP_PCB_ANY_FEATURES, 3263 SCTP_ASOC_ANY_STATE, 3264 (void *)asc, 0, 3265 sctp_asconf_iterator_end, inp, 0); 3266 } 3267 return (0); 3268 } else { 3269 /* invalid address! */ 3270 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3271 return (EADDRNOTAVAIL); 3272 } 3273 } 3274 3275 void 3276 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3277 struct sctp_nets *net) 3278 { 3279 struct sctp_asconf_addr *aa; 3280 struct sctp_ifa *sctp_ifap; 3281 struct sctp_asconf_tag_param *vtag; 3282 3283 #ifdef INET 3284 struct sockaddr_in *to; 3285 3286 #endif 3287 #ifdef INET6 3288 struct sockaddr_in6 *to6; 3289 3290 #endif 3291 if (net == NULL) { 3292 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3293 return; 3294 } 3295 if (stcb == NULL) { 3296 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3297 return; 3298 } 3299 /* 3300 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3301 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3302 */ 3303 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3304 SCTP_M_ASC_ADDR); 3305 if (aa == NULL) { 3306 /* didn't get memory */ 3307 SCTPDBG(SCTP_DEBUG_ASCONF1, 3308 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3309 return; 3310 } 3311 aa->special_del = 0; 3312 /* fill in asconf address parameter fields */ 3313 /* top level elements are "networked" during send */ 3314 aa->ifa = NULL; 3315 aa->sent = 0; /* clear sent flag */ 3316 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3317 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3318 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3319 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3320 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3321 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3322 3323 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3324 SCTP_M_ASC_ADDR); 3325 if (aa == NULL) { 3326 /* didn't get memory */ 3327 SCTPDBG(SCTP_DEBUG_ASCONF1, 3328 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3329 return; 3330 } 3331 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3332 /* fill in asconf address parameter fields */ 3333 /* ADD(0.0.0.0) */ 3334 switch (net->ro._l_addr.sa.sa_family) { 3335 #ifdef INET 3336 case AF_INET: 3337 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3338 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3339 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3340 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3341 /* No need to add an address, we are using 0.0.0.0 */ 3342 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3343 break; 3344 #endif 3345 #ifdef INET6 3346 case AF_INET6: 3347 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3348 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3349 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3350 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3351 /* No need to add an address, we are using 0.0.0.0 */ 3352 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3353 break; 3354 #endif 3355 default: 3356 SCTPDBG(SCTP_DEBUG_ASCONF1, 3357 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3358 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3359 return; 3360 } 3361 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3362 SCTP_M_ASC_ADDR); 3363 if (aa == NULL) { 3364 /* didn't get memory */ 3365 SCTPDBG(SCTP_DEBUG_ASCONF1, 3366 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3367 return; 3368 } 3369 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3370 /* fill in asconf address parameter fields */ 3371 /* ADD(0.0.0.0) */ 3372 switch (net->ro._l_addr.sa.sa_family) { 3373 #ifdef INET 3374 case AF_INET: 3375 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3376 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3377 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3378 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3379 /* No need to add an address, we are using 0.0.0.0 */ 3380 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3381 break; 3382 #endif 3383 #ifdef INET6 3384 case AF_INET6: 3385 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3386 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3387 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3388 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3389 /* No need to add an address, we are using 0.0.0.0 */ 3390 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3391 break; 3392 #endif 3393 default: 3394 SCTPDBG(SCTP_DEBUG_ASCONF1, 3395 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3396 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3397 return; 3398 } 3399 /* Now we must hunt the addresses and add all global addresses */ 3400 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3401 struct sctp_vrf *vrf = NULL; 3402 struct sctp_ifn *sctp_ifnp; 3403 uint32_t vrf_id; 3404 3405 vrf_id = stcb->sctp_ep->def_vrf_id; 3406 vrf = sctp_find_vrf(vrf_id); 3407 if (vrf == NULL) { 3408 goto skip_rest; 3409 } 3410 SCTP_IPI_ADDR_RLOCK(); 3411 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3412 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3413 switch (sctp_ifap->address.sa.sa_family) { 3414 #ifdef INET 3415 case AF_INET: 3416 to = &sctp_ifap->address.sin; 3417 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3418 &to->sin_addr) != 0) { 3419 continue; 3420 } 3421 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3422 continue; 3423 } 3424 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3425 continue; 3426 } 3427 break; 3428 #endif 3429 #ifdef INET6 3430 case AF_INET6: 3431 to6 = &sctp_ifap->address.sin6; 3432 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3433 &to6->sin6_addr) != 0) { 3434 continue; 3435 } 3436 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3437 continue; 3438 } 3439 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3440 continue; 3441 } 3442 break; 3443 #endif 3444 default: 3445 continue; 3446 } 3447 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3448 } 3449 } 3450 SCTP_IPI_ADDR_RUNLOCK(); 3451 } else { 3452 struct sctp_laddr *laddr; 3453 3454 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3455 if (laddr->ifa == NULL) { 3456 continue; 3457 } 3458 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3459 /* 3460 * Address being deleted by the system, dont 3461 * list. 3462 */ 3463 continue; 3464 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3465 /* 3466 * Address being deleted on this ep don't 3467 * list. 3468 */ 3469 continue; 3470 } 3471 sctp_ifap = laddr->ifa; 3472 switch (sctp_ifap->address.sa.sa_family) { 3473 #ifdef INET 3474 case AF_INET: 3475 to = &sctp_ifap->address.sin; 3476 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3477 continue; 3478 } 3479 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3480 continue; 3481 } 3482 break; 3483 #endif 3484 #ifdef INET6 3485 case AF_INET6: 3486 to6 = &sctp_ifap->address.sin6; 3487 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3488 continue; 3489 } 3490 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3491 continue; 3492 } 3493 break; 3494 #endif 3495 default: 3496 continue; 3497 } 3498 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3499 } 3500 } 3501 skip_rest: 3502 /* Now we must send the asconf into the queue */ 3503 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3504 } 3505