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 stcb->sctp_ep->fibnum); 1114 if (net->ro.ro_rt == NULL) 1115 continue; 1116 1117 changed = 0; 1118 switch (net->ro._l_addr.sa.sa_family) { 1119 #ifdef INET 1120 case AF_INET: 1121 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) { 1122 changed = 1; 1123 } 1124 break; 1125 #endif 1126 #ifdef INET6 1127 case AF_INET6: 1128 if (sctp_v6src_match_nexthop( 1129 &newifa->address.sin6, (sctp_route_t *) & net->ro)) { 1130 changed = 1; 1131 } 1132 break; 1133 #endif 1134 default: 1135 break; 1136 } 1137 /* 1138 * if the newly added address does not relate routing 1139 * information, we skip. 1140 */ 1141 if (changed == 0) 1142 continue; 1143 /* Retransmit unacknowledged DATA chunks immediately */ 1144 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1145 SCTP_MOBILITY_FASTHANDOFF)) { 1146 sctp_net_immediate_retrans(stcb, net); 1147 } 1148 /* Send SET PRIMARY for this new address */ 1149 if (net == stcb->asoc.primary_destination) { 1150 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1151 SCTP_SET_PRIM_ADDR); 1152 } 1153 } 1154 } 1155 1156 /* 1157 * process an ADD/DELETE IP ack from peer. 1158 * addr: corresponding sctp_ifa to the address being added/deleted. 1159 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1160 * flag: 1=success, 0=failure. 1161 */ 1162 static void 1163 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1164 { 1165 /* 1166 * do the necessary asoc list work- if we get a failure indication, 1167 * leave the address on the assoc's restricted list. If we get a 1168 * success indication, remove the address from the restricted list. 1169 */ 1170 /* 1171 * Note: this will only occur for ADD_IP_ADDRESS, since 1172 * DEL_IP_ADDRESS is never actually added to the list... 1173 */ 1174 if (flag) { 1175 /* success case, so remove from the restricted list */ 1176 sctp_del_local_addr_restricted(stcb, addr); 1177 1178 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1179 SCTP_MOBILITY_BASE) || 1180 sctp_is_mobility_feature_on(stcb->sctp_ep, 1181 SCTP_MOBILITY_FASTHANDOFF)) { 1182 sctp_path_check_and_react(stcb, addr); 1183 return; 1184 } 1185 /* clear any cached/topologically incorrect source addresses */ 1186 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1187 } 1188 /* else, leave it on the list */ 1189 } 1190 1191 /* 1192 * add an asconf add/delete/set primary IP address parameter to the queue. 1193 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1194 * returns 0 if queued, -1 if not queued/removed. 1195 * NOTE: if adding, but a delete for the same address is already scheduled 1196 * (and not yet sent out), simply remove it from queue. Same for deleting 1197 * an address already scheduled for add. If a duplicate operation is found, 1198 * ignore the new one. 1199 */ 1200 static int 1201 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1202 uint16_t type) 1203 { 1204 struct sctp_asconf_addr *aa, *aa_next; 1205 1206 /* make sure the request isn't already in the queue */ 1207 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1208 /* address match? */ 1209 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1210 continue; 1211 /* 1212 * is the request already in queue but not sent? pass the 1213 * request already sent in order to resolve the following 1214 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1215 * can't remove the ADD request already sent 3. arrival of 1216 * ADD 1217 */ 1218 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1219 return (-1); 1220 } 1221 /* is the negative request already in queue, and not sent */ 1222 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1223 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1224 /* add requested, delete already queued */ 1225 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1226 /* remove the ifa from the restricted list */ 1227 sctp_del_local_addr_restricted(stcb, ifa); 1228 /* free the asconf param */ 1229 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1230 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1231 return (-1); 1232 } 1233 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1234 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1235 /* delete requested, add already queued */ 1236 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1237 /* remove the aa->ifa from the restricted list */ 1238 sctp_del_local_addr_restricted(stcb, aa->ifa); 1239 /* free the asconf param */ 1240 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1241 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1242 return (-1); 1243 } 1244 } /* for each aa */ 1245 1246 /* adding new request to the queue */ 1247 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1248 SCTP_M_ASC_ADDR); 1249 if (aa == NULL) { 1250 /* didn't get memory */ 1251 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1252 return (-1); 1253 } 1254 aa->special_del = 0; 1255 /* fill in asconf address parameter fields */ 1256 /* top level elements are "networked" during send */ 1257 aa->ap.aph.ph.param_type = type; 1258 aa->ifa = ifa; 1259 atomic_add_int(&ifa->refcount, 1); 1260 /* correlation_id filled in during send routine later... */ 1261 switch (ifa->address.sa.sa_family) { 1262 #ifdef INET6 1263 case AF_INET6: 1264 { 1265 struct sockaddr_in6 *sin6; 1266 1267 sin6 = &ifa->address.sin6; 1268 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1269 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1270 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1271 sizeof(struct sctp_ipv6addr_param); 1272 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1273 sizeof(struct in6_addr)); 1274 break; 1275 } 1276 #endif 1277 #ifdef INET 1278 case AF_INET: 1279 { 1280 struct sockaddr_in *sin; 1281 1282 sin = &ifa->address.sin; 1283 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1284 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1285 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1286 sizeof(struct sctp_ipv4addr_param); 1287 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1288 sizeof(struct in_addr)); 1289 break; 1290 } 1291 #endif 1292 default: 1293 /* invalid family! */ 1294 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1295 sctp_free_ifa(ifa); 1296 return (-1); 1297 } 1298 aa->sent = 0; /* clear sent flag */ 1299 1300 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1301 #ifdef SCTP_DEBUG 1302 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1303 if (type == SCTP_ADD_IP_ADDRESS) { 1304 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1305 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1306 } else if (type == SCTP_DEL_IP_ADDRESS) { 1307 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1308 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1309 } else { 1310 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1311 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1312 } 1313 } 1314 #endif 1315 1316 return (0); 1317 } 1318 1319 1320 /* 1321 * add an asconf operation for the given ifa and type. 1322 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1323 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1324 * advisable. 1325 */ 1326 static int 1327 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1328 uint16_t type) 1329 { 1330 uint32_t status; 1331 int pending_delete_queued = 0; 1332 int last; 1333 1334 /* see if peer supports ASCONF */ 1335 if (stcb->asoc.asconf_supported == 0) { 1336 return (-1); 1337 } 1338 /* 1339 * if this is deleting the last address from the assoc, mark it as 1340 * pending. 1341 */ 1342 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { 1343 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1344 last = (sctp_local_addr_count(stcb) == 0); 1345 } else { 1346 last = (sctp_local_addr_count(stcb) == 1); 1347 } 1348 if (last) { 1349 /* set the pending delete info only */ 1350 stcb->asoc.asconf_del_pending = 1; 1351 stcb->asoc.asconf_addr_del_pending = ifa; 1352 atomic_add_int(&ifa->refcount, 1); 1353 SCTPDBG(SCTP_DEBUG_ASCONF2, 1354 "asconf_queue_add: mark delete last address pending\n"); 1355 return (-1); 1356 } 1357 } 1358 /* queue an asconf parameter */ 1359 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1360 1361 /* 1362 * if this is an add, and there is a delete also pending (i.e. the 1363 * last local address is being changed), queue the pending delete 1364 * too. 1365 */ 1366 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1367 /* queue in the pending delete */ 1368 if (sctp_asconf_queue_mgmt(stcb, 1369 stcb->asoc.asconf_addr_del_pending, 1370 SCTP_DEL_IP_ADDRESS) == 0) { 1371 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1372 pending_delete_queued = 1; 1373 /* clear out the pending delete info */ 1374 stcb->asoc.asconf_del_pending = 0; 1375 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1376 stcb->asoc.asconf_addr_del_pending = NULL; 1377 } 1378 } 1379 if (pending_delete_queued) { 1380 struct sctp_nets *net; 1381 1382 /* 1383 * since we know that the only/last address is now being 1384 * changed in this case, reset the cwnd/rto on all nets to 1385 * start as a new address and path. Also clear the error 1386 * counts to give the assoc the best chance to complete the 1387 * address change. 1388 */ 1389 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1390 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1391 net); 1392 net->RTO = 0; 1393 net->error_count = 0; 1394 } 1395 stcb->asoc.overall_error_count = 0; 1396 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1397 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1398 stcb->asoc.overall_error_count, 1399 0, 1400 SCTP_FROM_SCTP_ASCONF, 1401 __LINE__); 1402 } 1403 /* queue in an advisory set primary too */ 1404 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1405 /* let caller know we should send this out immediately */ 1406 status = 1; 1407 } 1408 return (status); 1409 } 1410 1411 /*- 1412 * add an asconf delete IP address parameter to the queue by sockaddr and 1413 * possibly with no sctp_ifa available. This is only called by the routine 1414 * that checks the addresses in an INIT-ACK against the current address list. 1415 * returns 0 if completed, non-zero if not completed. 1416 * NOTE: if an add is already scheduled (and not yet sent out), simply 1417 * remove it from queue. If a duplicate operation is found, ignore the 1418 * new one. 1419 */ 1420 static int 1421 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1422 { 1423 struct sctp_ifa *ifa; 1424 struct sctp_asconf_addr *aa, *aa_next; 1425 1426 if (stcb == NULL) { 1427 return (-1); 1428 } 1429 /* see if peer supports ASCONF */ 1430 if (stcb->asoc.asconf_supported == 0) { 1431 return (-1); 1432 } 1433 /* make sure the request isn't already in the queue */ 1434 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1435 /* address match? */ 1436 if (sctp_asconf_addr_match(aa, sa) == 0) 1437 continue; 1438 /* is the request already in queue (sent or not) */ 1439 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1440 return (-1); 1441 } 1442 /* is the negative request already in queue, and not sent */ 1443 if (aa->sent == 1) 1444 continue; 1445 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1446 /* add already queued, so remove existing entry */ 1447 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1448 sctp_del_local_addr_restricted(stcb, aa->ifa); 1449 /* free the entry */ 1450 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1451 return (-1); 1452 } 1453 } /* for each aa */ 1454 1455 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1456 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1457 1458 /* adding new request to the queue */ 1459 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1460 SCTP_M_ASC_ADDR); 1461 if (aa == NULL) { 1462 /* didn't get memory */ 1463 SCTPDBG(SCTP_DEBUG_ASCONF1, 1464 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1465 return (-1); 1466 } 1467 aa->special_del = 0; 1468 /* fill in asconf address parameter fields */ 1469 /* top level elements are "networked" during send */ 1470 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1471 aa->ifa = ifa; 1472 if (ifa) 1473 atomic_add_int(&ifa->refcount, 1); 1474 /* correlation_id filled in during send routine later... */ 1475 switch (sa->sa_family) { 1476 #ifdef INET6 1477 case AF_INET6: 1478 { 1479 /* IPv6 address */ 1480 struct sockaddr_in6 *sin6; 1481 1482 sin6 = (struct sockaddr_in6 *)sa; 1483 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1484 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1485 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1486 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1487 sizeof(struct in6_addr)); 1488 break; 1489 } 1490 #endif 1491 #ifdef INET 1492 case AF_INET: 1493 { 1494 /* IPv4 address */ 1495 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1496 1497 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1498 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1499 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1500 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1501 sizeof(struct in_addr)); 1502 break; 1503 } 1504 #endif 1505 default: 1506 /* invalid family! */ 1507 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1508 if (ifa) 1509 sctp_free_ifa(ifa); 1510 return (-1); 1511 } 1512 aa->sent = 0; /* clear sent flag */ 1513 1514 /* delete goes to the back of the queue */ 1515 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1516 1517 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1518 return (0); 1519 } 1520 1521 /* 1522 * find a specific asconf param on our "sent" queue 1523 */ 1524 static struct sctp_asconf_addr * 1525 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1526 { 1527 struct sctp_asconf_addr *aa; 1528 1529 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1530 if (aa->ap.aph.correlation_id == correlation_id && 1531 aa->sent == 1) { 1532 /* found it */ 1533 return (aa); 1534 } 1535 } 1536 /* didn't find it */ 1537 return (NULL); 1538 } 1539 1540 /* 1541 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1542 * notifications based on the error response 1543 */ 1544 static void 1545 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1546 struct sctp_asconf_paramhdr *aph) 1547 { 1548 struct sctp_error_cause *eh; 1549 struct sctp_paramhdr *ph; 1550 uint16_t param_type; 1551 uint16_t error_code; 1552 1553 eh = (struct sctp_error_cause *)(aph + 1); 1554 ph = (struct sctp_paramhdr *)(eh + 1); 1555 /* validate lengths */ 1556 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1557 htons(aph->ph.param_length)) { 1558 /* invalid error cause length */ 1559 SCTPDBG(SCTP_DEBUG_ASCONF1, 1560 "asconf_process_error: cause element too long\n"); 1561 return; 1562 } 1563 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1564 htons(eh->length)) { 1565 /* invalid included TLV length */ 1566 SCTPDBG(SCTP_DEBUG_ASCONF1, 1567 "asconf_process_error: included TLV too long\n"); 1568 return; 1569 } 1570 /* which error code ? */ 1571 error_code = ntohs(eh->code); 1572 param_type = ntohs(aph->ph.param_type); 1573 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1574 switch (error_code) { 1575 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1576 /* we allow ourselves to "try again" for this error */ 1577 break; 1578 default: 1579 /* peer can't handle it... */ 1580 switch (param_type) { 1581 case SCTP_ADD_IP_ADDRESS: 1582 case SCTP_DEL_IP_ADDRESS: 1583 case SCTP_SET_PRIM_ADDR: 1584 break; 1585 default: 1586 break; 1587 } 1588 } 1589 } 1590 1591 /* 1592 * process an asconf queue param. 1593 * aparam: parameter to process, will be removed from the queue. 1594 * flag: 1=success case, 0=failure case 1595 */ 1596 static void 1597 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1598 struct sctp_asconf_addr *aparam, uint32_t flag) 1599 { 1600 uint16_t param_type; 1601 1602 /* process this param */ 1603 param_type = aparam->ap.aph.ph.param_type; 1604 switch (param_type) { 1605 case SCTP_ADD_IP_ADDRESS: 1606 SCTPDBG(SCTP_DEBUG_ASCONF1, 1607 "process_param_ack: added IP address\n"); 1608 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1609 break; 1610 case SCTP_DEL_IP_ADDRESS: 1611 SCTPDBG(SCTP_DEBUG_ASCONF1, 1612 "process_param_ack: deleted IP address\n"); 1613 /* nothing really to do... lists already updated */ 1614 break; 1615 case SCTP_SET_PRIM_ADDR: 1616 SCTPDBG(SCTP_DEBUG_ASCONF1, 1617 "process_param_ack: set primary IP address\n"); 1618 /* nothing to do... peer may start using this addr */ 1619 break; 1620 default: 1621 /* should NEVER happen */ 1622 break; 1623 } 1624 1625 /* remove the param and free it */ 1626 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1627 if (aparam->ifa) 1628 sctp_free_ifa(aparam->ifa); 1629 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1630 } 1631 1632 /* 1633 * cleanup from a bad asconf ack parameter 1634 */ 1635 static void 1636 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1637 { 1638 /* assume peer doesn't really know how to do asconfs */ 1639 /* XXX we could free the pending queue here */ 1640 1641 } 1642 1643 void 1644 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1645 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1646 struct sctp_nets *net, int *abort_no_unlock) 1647 { 1648 struct sctp_association *asoc; 1649 uint32_t serial_num; 1650 uint16_t ack_length; 1651 struct sctp_asconf_paramhdr *aph; 1652 struct sctp_asconf_addr *aa, *aa_next; 1653 uint32_t last_error_id = 0; /* last error correlation id */ 1654 uint32_t id; 1655 struct sctp_asconf_addr *ap; 1656 1657 /* asconf param buffer */ 1658 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1659 1660 /* verify minimum length */ 1661 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1662 SCTPDBG(SCTP_DEBUG_ASCONF1, 1663 "handle_asconf_ack: chunk too small = %xh\n", 1664 ntohs(cp->ch.chunk_length)); 1665 return; 1666 } 1667 asoc = &stcb->asoc; 1668 serial_num = ntohl(cp->serial_number); 1669 1670 /* 1671 * NOTE: we may want to handle this differently- currently, we will 1672 * abort when we get an ack for the expected serial number + 1 (eg. 1673 * we didn't send it), process an ack normally if it is the expected 1674 * serial number, and re-send the previous ack for *ALL* other 1675 * serial numbers 1676 */ 1677 1678 /* 1679 * if the serial number is the next expected, but I didn't send it, 1680 * abort the asoc, since someone probably just hijacked us... 1681 */ 1682 if (serial_num == (asoc->asconf_seq_out + 1)) { 1683 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1684 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED); 1685 *abort_no_unlock = 1; 1686 return; 1687 } 1688 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1689 /* got a duplicate/unexpected ASCONF-ACK */ 1690 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1691 serial_num, asoc->asconf_seq_out_acked + 1); 1692 return; 1693 } 1694 if (serial_num == asoc->asconf_seq_out - 1) { 1695 /* stop our timer */ 1696 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1697 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1698 } 1699 /* process the ASCONF-ACK contents */ 1700 ack_length = ntohs(cp->ch.chunk_length) - 1701 sizeof(struct sctp_asconf_ack_chunk); 1702 offset += sizeof(struct sctp_asconf_ack_chunk); 1703 /* process through all parameters */ 1704 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1705 unsigned int param_length, param_type; 1706 1707 /* get pointer to next asconf parameter */ 1708 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1709 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1710 if (aph == NULL) { 1711 /* can't get an asconf paramhdr */ 1712 sctp_asconf_ack_clear(stcb); 1713 return; 1714 } 1715 param_type = ntohs(aph->ph.param_type); 1716 param_length = ntohs(aph->ph.param_length); 1717 if (param_length > ack_length) { 1718 sctp_asconf_ack_clear(stcb); 1719 return; 1720 } 1721 if (param_length < sizeof(struct sctp_paramhdr)) { 1722 sctp_asconf_ack_clear(stcb); 1723 return; 1724 } 1725 /* get the complete parameter... */ 1726 if (param_length > sizeof(aparam_buf)) { 1727 SCTPDBG(SCTP_DEBUG_ASCONF1, 1728 "param length (%u) larger than buffer size!\n", param_length); 1729 sctp_asconf_ack_clear(stcb); 1730 return; 1731 } 1732 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1733 if (aph == NULL) { 1734 sctp_asconf_ack_clear(stcb); 1735 return; 1736 } 1737 /* correlation_id is transparent to peer, no ntohl needed */ 1738 id = aph->correlation_id; 1739 1740 switch (param_type) { 1741 case SCTP_ERROR_CAUSE_IND: 1742 last_error_id = id; 1743 /* find the corresponding asconf param in our queue */ 1744 ap = sctp_asconf_find_param(stcb, id); 1745 if (ap == NULL) { 1746 /* hmm... can't find this in our queue! */ 1747 break; 1748 } 1749 /* process the parameter, failed flag */ 1750 sctp_asconf_process_param_ack(stcb, ap, 0); 1751 /* process the error response */ 1752 sctp_asconf_process_error(stcb, aph); 1753 break; 1754 case SCTP_SUCCESS_REPORT: 1755 /* find the corresponding asconf param in our queue */ 1756 ap = sctp_asconf_find_param(stcb, id); 1757 if (ap == NULL) { 1758 /* hmm... can't find this in our queue! */ 1759 break; 1760 } 1761 /* process the parameter, success flag */ 1762 sctp_asconf_process_param_ack(stcb, ap, 1); 1763 break; 1764 default: 1765 break; 1766 } /* switch */ 1767 1768 /* update remaining ASCONF-ACK message length to process */ 1769 ack_length -= SCTP_SIZE32(param_length); 1770 if (ack_length <= 0) { 1771 /* no more data in the mbuf chain */ 1772 break; 1773 } 1774 offset += SCTP_SIZE32(param_length); 1775 } /* while */ 1776 1777 /* 1778 * if there are any "sent" params still on the queue, these are 1779 * implicitly "success", or "failed" (if we got an error back) ... 1780 * so process these appropriately 1781 * 1782 * we assume that the correlation_id's are monotonically increasing 1783 * beginning from 1 and that we don't have *that* many outstanding 1784 * at any given time 1785 */ 1786 if (last_error_id == 0) 1787 last_error_id--;/* set to "max" value */ 1788 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1789 if (aa->sent == 1) { 1790 /* 1791 * implicitly successful or failed if correlation_id 1792 * < last_error_id, then success else, failure 1793 */ 1794 if (aa->ap.aph.correlation_id < last_error_id) 1795 sctp_asconf_process_param_ack(stcb, aa, 1); 1796 else 1797 sctp_asconf_process_param_ack(stcb, aa, 0); 1798 } else { 1799 /* 1800 * since we always process in order (FIFO queue) if 1801 * we reach one that hasn't been sent, the rest 1802 * should not have been sent either. so, we're 1803 * done... 1804 */ 1805 break; 1806 } 1807 } 1808 1809 /* update the next sequence number to use */ 1810 asoc->asconf_seq_out_acked++; 1811 /* remove the old ASCONF on our outbound queue */ 1812 sctp_toss_old_asconf(stcb); 1813 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1814 #ifdef SCTP_TIMER_BASED_ASCONF 1815 /* we have more params, so restart our timer */ 1816 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1817 stcb, net); 1818 #else 1819 /* we have more params, so send out more */ 1820 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1821 #endif 1822 } 1823 } 1824 1825 #ifdef INET6 1826 static uint32_t 1827 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1828 { 1829 struct sockaddr_in6 *sin6, *net6; 1830 struct sctp_nets *net; 1831 1832 if (sa->sa_family != AF_INET6) { 1833 /* wrong family */ 1834 return (0); 1835 } 1836 sin6 = (struct sockaddr_in6 *)sa; 1837 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1838 /* not link local address */ 1839 return (0); 1840 } 1841 /* hunt through our destination nets list for this scope_id */ 1842 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1843 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1844 AF_INET6) 1845 continue; 1846 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1847 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1848 continue; 1849 if (sctp_is_same_scope(sin6, net6)) { 1850 /* found one */ 1851 return (1); 1852 } 1853 } 1854 /* didn't find one */ 1855 return (0); 1856 } 1857 1858 #endif 1859 1860 /* 1861 * address management functions 1862 */ 1863 static void 1864 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1865 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1866 { 1867 int status; 1868 1869 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1870 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1871 /* subset bound, no ASCONF allowed case, so ignore */ 1872 return; 1873 } 1874 /* 1875 * note: we know this is not the subset bound, no ASCONF case eg. 1876 * this is boundall or subset bound w/ASCONF allowed 1877 */ 1878 1879 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1880 switch (ifa->address.sa.sa_family) { 1881 #ifdef INET6 1882 case AF_INET6: 1883 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1884 &ifa->address.sin6.sin6_addr) != 0) { 1885 return; 1886 } 1887 break; 1888 #endif 1889 #ifdef INET 1890 case AF_INET: 1891 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1892 &ifa->address.sin.sin_addr) != 0) { 1893 return; 1894 } 1895 break; 1896 #endif 1897 default: 1898 return; 1899 } 1900 #ifdef INET6 1901 /* make sure we're "allowed" to add this type of addr */ 1902 if (ifa->address.sa.sa_family == AF_INET6) { 1903 /* invalid if we're not a v6 endpoint */ 1904 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1905 return; 1906 /* is the v6 addr really valid ? */ 1907 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1908 return; 1909 } 1910 } 1911 #endif 1912 /* put this address on the "pending/do not use yet" list */ 1913 sctp_add_local_addr_restricted(stcb, ifa); 1914 /* 1915 * check address scope if address is out of scope, don't queue 1916 * anything... note: this would leave the address on both inp and 1917 * asoc lists 1918 */ 1919 switch (ifa->address.sa.sa_family) { 1920 #ifdef INET6 1921 case AF_INET6: 1922 { 1923 struct sockaddr_in6 *sin6; 1924 1925 sin6 = &ifa->address.sin6; 1926 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1927 /* we skip unspecifed addresses */ 1928 return; 1929 } 1930 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1931 if (stcb->asoc.scope.local_scope == 0) { 1932 return; 1933 } 1934 /* is it the right link local scope? */ 1935 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1936 return; 1937 } 1938 } 1939 if (stcb->asoc.scope.site_scope == 0 && 1940 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1941 return; 1942 } 1943 break; 1944 } 1945 #endif 1946 #ifdef INET 1947 case AF_INET: 1948 { 1949 struct sockaddr_in *sin; 1950 struct in6pcb *inp6; 1951 1952 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1953 /* invalid if we are a v6 only endpoint */ 1954 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1955 SCTP_IPV6_V6ONLY(inp6)) 1956 return; 1957 1958 sin = &ifa->address.sin; 1959 if (sin->sin_addr.s_addr == 0) { 1960 /* we skip unspecifed addresses */ 1961 return; 1962 } 1963 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1964 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1965 return; 1966 } 1967 break; 1968 } 1969 #endif 1970 default: 1971 /* else, not AF_INET or AF_INET6, so skip */ 1972 return; 1973 } 1974 1975 /* queue an asconf for this address add/delete */ 1976 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1977 /* does the peer do asconf? */ 1978 if (stcb->asoc.asconf_supported) { 1979 /* queue an asconf for this addr */ 1980 status = sctp_asconf_queue_add(stcb, ifa, type); 1981 1982 /* 1983 * if queued ok, and in the open state, send out the 1984 * ASCONF. If in the non-open state, these will be 1985 * sent when the state goes open. 1986 */ 1987 if (status == 0 && 1988 ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 1989 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 1990 #ifdef SCTP_TIMER_BASED_ASCONF 1991 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1992 stcb, stcb->asoc.primary_destination); 1993 #else 1994 sctp_send_asconf(stcb, NULL, addr_locked); 1995 #endif 1996 } 1997 } 1998 } 1999 } 2000 2001 2002 int 2003 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2004 { 2005 struct sctp_asconf_iterator *asc; 2006 struct sctp_ifa *ifa; 2007 struct sctp_laddr *l; 2008 int cnt_invalid = 0; 2009 2010 asc = (struct sctp_asconf_iterator *)ptr; 2011 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2012 ifa = l->ifa; 2013 switch (ifa->address.sa.sa_family) { 2014 #ifdef INET6 2015 case AF_INET6: 2016 /* invalid if we're not a v6 endpoint */ 2017 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2018 cnt_invalid++; 2019 if (asc->cnt == cnt_invalid) 2020 return (1); 2021 } 2022 break; 2023 #endif 2024 #ifdef INET 2025 case AF_INET: 2026 { 2027 /* invalid if we are a v6 only endpoint */ 2028 struct in6pcb *inp6; 2029 2030 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2031 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2032 SCTP_IPV6_V6ONLY(inp6)) { 2033 cnt_invalid++; 2034 if (asc->cnt == cnt_invalid) 2035 return (1); 2036 } 2037 break; 2038 } 2039 #endif 2040 default: 2041 /* invalid address family */ 2042 cnt_invalid++; 2043 if (asc->cnt == cnt_invalid) 2044 return (1); 2045 } 2046 } 2047 return (0); 2048 } 2049 2050 static int 2051 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2052 { 2053 struct sctp_ifa *ifa; 2054 struct sctp_asconf_iterator *asc; 2055 struct sctp_laddr *laddr, *nladdr, *l; 2056 2057 /* Only for specific case not bound all */ 2058 asc = (struct sctp_asconf_iterator *)ptr; 2059 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2060 ifa = l->ifa; 2061 if (l->action == SCTP_ADD_IP_ADDRESS) { 2062 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2063 sctp_nxt_addr) { 2064 if (laddr->ifa == ifa) { 2065 laddr->action = 0; 2066 break; 2067 } 2068 } 2069 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2070 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2071 /* remove only after all guys are done */ 2072 if (laddr->ifa == ifa) { 2073 sctp_del_local_addr_ep(inp, ifa); 2074 } 2075 } 2076 } 2077 } 2078 return (0); 2079 } 2080 2081 void 2082 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2083 void *ptr, uint32_t val SCTP_UNUSED) 2084 { 2085 struct sctp_asconf_iterator *asc; 2086 struct sctp_ifa *ifa; 2087 struct sctp_laddr *l; 2088 int cnt_invalid = 0; 2089 int type, status; 2090 int num_queued = 0; 2091 2092 asc = (struct sctp_asconf_iterator *)ptr; 2093 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2094 ifa = l->ifa; 2095 type = l->action; 2096 2097 /* address's vrf_id must be the vrf_id of the assoc */ 2098 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2099 continue; 2100 } 2101 /* Same checks again for assoc */ 2102 switch (ifa->address.sa.sa_family) { 2103 #ifdef INET6 2104 case AF_INET6: 2105 { 2106 /* invalid if we're not a v6 endpoint */ 2107 struct sockaddr_in6 *sin6; 2108 2109 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2110 cnt_invalid++; 2111 if (asc->cnt == cnt_invalid) 2112 return; 2113 else 2114 continue; 2115 } 2116 sin6 = &ifa->address.sin6; 2117 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2118 /* we skip unspecifed addresses */ 2119 continue; 2120 } 2121 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2122 &sin6->sin6_addr) != 0) { 2123 continue; 2124 } 2125 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2126 if (stcb->asoc.scope.local_scope == 0) { 2127 continue; 2128 } 2129 /* is it the right link local scope? */ 2130 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2131 continue; 2132 } 2133 } 2134 break; 2135 } 2136 #endif 2137 #ifdef INET 2138 case AF_INET: 2139 { 2140 /* invalid if we are a v6 only endpoint */ 2141 struct in6pcb *inp6; 2142 struct sockaddr_in *sin; 2143 2144 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2145 /* invalid if we are a v6 only endpoint */ 2146 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2147 SCTP_IPV6_V6ONLY(inp6)) 2148 continue; 2149 2150 sin = &ifa->address.sin; 2151 if (sin->sin_addr.s_addr == 0) { 2152 /* we skip unspecifed addresses */ 2153 continue; 2154 } 2155 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2156 &sin->sin_addr) != 0) { 2157 continue; 2158 } 2159 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2160 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2161 continue; 2162 } 2163 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2164 SCTP_IPV6_V6ONLY(inp6)) { 2165 cnt_invalid++; 2166 if (asc->cnt == cnt_invalid) 2167 return; 2168 else 2169 continue; 2170 } 2171 break; 2172 } 2173 #endif 2174 default: 2175 /* invalid address family */ 2176 cnt_invalid++; 2177 if (asc->cnt == cnt_invalid) 2178 return; 2179 else 2180 continue; 2181 break; 2182 } 2183 2184 if (type == SCTP_ADD_IP_ADDRESS) { 2185 /* prevent this address from being used as a source */ 2186 sctp_add_local_addr_restricted(stcb, ifa); 2187 } else if (type == SCTP_DEL_IP_ADDRESS) { 2188 struct sctp_nets *net; 2189 2190 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2191 sctp_rtentry_t *rt; 2192 2193 /* delete this address if cached */ 2194 if (net->ro._s_addr == ifa) { 2195 sctp_free_ifa(net->ro._s_addr); 2196 net->ro._s_addr = NULL; 2197 net->src_addr_selected = 0; 2198 rt = net->ro.ro_rt; 2199 if (rt) { 2200 RTFREE(rt); 2201 net->ro.ro_rt = NULL; 2202 } 2203 /* 2204 * Now we deleted our src address, 2205 * should we not also now reset the 2206 * cwnd/rto to start as if its a new 2207 * address? 2208 */ 2209 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2210 net->RTO = 0; 2211 2212 } 2213 } 2214 } else if (type == SCTP_SET_PRIM_ADDR) { 2215 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2216 /* must validate the ifa is in the ep */ 2217 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2218 continue; 2219 } 2220 } else { 2221 /* Need to check scopes for this guy */ 2222 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2223 continue; 2224 } 2225 } 2226 } 2227 /* queue an asconf for this address add/delete */ 2228 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2229 stcb->asoc.asconf_supported == 1) { 2230 /* queue an asconf for this addr */ 2231 status = sctp_asconf_queue_add(stcb, ifa, type); 2232 /* 2233 * if queued ok, and in the open state, update the 2234 * count of queued params. If in the non-open 2235 * state, these get sent when the assoc goes open. 2236 */ 2237 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2238 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2239 if (status >= 0) { 2240 num_queued++; 2241 } 2242 } 2243 } 2244 } 2245 /* 2246 * If we have queued params in the open state, send out an ASCONF. 2247 */ 2248 if (num_queued > 0) { 2249 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2250 } 2251 } 2252 2253 void 2254 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2255 { 2256 struct sctp_asconf_iterator *asc; 2257 struct sctp_ifa *ifa; 2258 struct sctp_laddr *l, *nl; 2259 2260 asc = (struct sctp_asconf_iterator *)ptr; 2261 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2262 ifa = l->ifa; 2263 if (l->action == SCTP_ADD_IP_ADDRESS) { 2264 /* Clear the defer use flag */ 2265 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2266 } 2267 sctp_free_ifa(ifa); 2268 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2269 SCTP_DECR_LADDR_COUNT(); 2270 } 2271 SCTP_FREE(asc, SCTP_M_ASC_IT); 2272 } 2273 2274 /* 2275 * sa is the sockaddr to ask the peer to set primary to. 2276 * returns: 0 = completed, -1 = error 2277 */ 2278 int32_t 2279 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2280 { 2281 uint32_t vrf_id; 2282 struct sctp_ifa *ifa; 2283 2284 /* find the ifa for the desired set primary */ 2285 vrf_id = stcb->asoc.vrf_id; 2286 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2287 if (ifa == NULL) { 2288 /* Invalid address */ 2289 return (-1); 2290 } 2291 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2292 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2293 /* set primary queuing succeeded */ 2294 SCTPDBG(SCTP_DEBUG_ASCONF1, 2295 "set_primary_ip_address_sa: queued on tcb=%p, ", 2296 (void *)stcb); 2297 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2298 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2299 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2300 #ifdef SCTP_TIMER_BASED_ASCONF 2301 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2302 stcb->sctp_ep, stcb, 2303 stcb->asoc.primary_destination); 2304 #else 2305 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2306 #endif 2307 } 2308 } else { 2309 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2310 (void *)stcb); 2311 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2312 return (-1); 2313 } 2314 return (0); 2315 } 2316 2317 void 2318 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2319 { 2320 struct sctp_inpcb *inp; 2321 2322 /* go through all our PCB's */ 2323 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2324 struct sctp_tcb *stcb; 2325 2326 /* process for all associations for this endpoint */ 2327 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2328 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2329 if (!sctp_asconf_queue_add(stcb, ifa, 2330 SCTP_SET_PRIM_ADDR)) { 2331 /* set primary queuing succeeded */ 2332 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2333 (void *)stcb); 2334 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2335 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2336 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2337 #ifdef SCTP_TIMER_BASED_ASCONF 2338 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2339 stcb->sctp_ep, stcb, 2340 stcb->asoc.primary_destination); 2341 #else 2342 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2343 #endif 2344 } 2345 } 2346 } /* for each stcb */ 2347 } /* for each inp */ 2348 } 2349 2350 int 2351 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2352 { 2353 struct sctp_tmit_chunk *chk, *nchk; 2354 unsigned int offset, asconf_limit; 2355 struct sctp_asconf_chunk *acp; 2356 struct sctp_asconf_paramhdr *aph; 2357 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2358 struct sctp_paramhdr *ph; 2359 int add_cnt, del_cnt; 2360 uint16_t last_param_type; 2361 2362 add_cnt = del_cnt = 0; 2363 last_param_type = 0; 2364 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2365 if (chk->data == NULL) { 2366 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2367 continue; 2368 } 2369 offset = 0; 2370 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2371 offset += sizeof(struct sctp_asconf_chunk); 2372 asconf_limit = ntohs(acp->ch.chunk_length); 2373 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2374 if (ph == NULL) { 2375 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2376 continue; 2377 } 2378 offset += ntohs(ph->param_length); 2379 2380 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2381 if (aph == NULL) { 2382 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2383 continue; 2384 } 2385 while (aph != NULL) { 2386 unsigned int param_length, param_type; 2387 2388 param_type = ntohs(aph->ph.param_type); 2389 param_length = ntohs(aph->ph.param_length); 2390 if (offset + param_length > asconf_limit) { 2391 /* parameter goes beyond end of chunk! */ 2392 break; 2393 } 2394 if (param_length > sizeof(aparam_buf)) { 2395 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2396 break; 2397 } 2398 if (param_length <= sizeof(struct sctp_paramhdr)) { 2399 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2400 break; 2401 } 2402 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2403 if (aph == NULL) { 2404 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2405 break; 2406 } 2407 ph = (struct sctp_paramhdr *)(aph + 1); 2408 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2409 switch (param_type) { 2410 case SCTP_ADD_IP_ADDRESS: 2411 add_cnt++; 2412 break; 2413 case SCTP_DEL_IP_ADDRESS: 2414 del_cnt++; 2415 break; 2416 default: 2417 break; 2418 } 2419 last_param_type = param_type; 2420 } 2421 offset += SCTP_SIZE32(param_length); 2422 if (offset >= asconf_limit) { 2423 /* no more data in the mbuf chain */ 2424 break; 2425 } 2426 /* get pointer to next asconf param */ 2427 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2428 } 2429 } 2430 2431 /* 2432 * we want to find the sequences which consist of ADD -> DEL -> ADD 2433 * or DEL -> ADD 2434 */ 2435 if (add_cnt > del_cnt || 2436 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2437 return (1); 2438 } 2439 return (0); 2440 } 2441 2442 static struct sockaddr * 2443 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2444 { 2445 struct sctp_vrf *vrf = NULL; 2446 struct sctp_ifn *sctp_ifn; 2447 struct sctp_ifa *sctp_ifa; 2448 2449 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2450 SCTP_IPI_ADDR_RLOCK(); 2451 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2452 if (vrf == NULL) { 2453 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2454 SCTP_IPI_ADDR_RUNLOCK(); 2455 return (NULL); 2456 } 2457 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2458 if (stcb->asoc.scope.loopback_scope == 0 && 2459 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2460 /* Skip if loopback_scope not set */ 2461 continue; 2462 } 2463 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2464 switch (sctp_ifa->address.sa.sa_family) { 2465 #ifdef INET 2466 case AF_INET: 2467 if (stcb->asoc.scope.ipv4_addr_legal) { 2468 struct sockaddr_in *sin; 2469 2470 sin = &sctp_ifa->address.sin; 2471 if (sin->sin_addr.s_addr == 0) { 2472 /* skip unspecifed addresses */ 2473 continue; 2474 } 2475 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2476 &sin->sin_addr) != 0) { 2477 continue; 2478 } 2479 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2480 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2481 continue; 2482 2483 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2484 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2485 continue; 2486 /* 2487 * found a valid local v4 address to 2488 * use 2489 */ 2490 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2491 SCTP_IPI_ADDR_RUNLOCK(); 2492 return (&sctp_ifa->address.sa); 2493 } 2494 break; 2495 #endif 2496 #ifdef INET6 2497 case AF_INET6: 2498 if (stcb->asoc.scope.ipv6_addr_legal) { 2499 struct sockaddr_in6 *sin6; 2500 2501 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2502 continue; 2503 } 2504 sin6 = &sctp_ifa->address.sin6; 2505 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2506 /* 2507 * we skip unspecifed 2508 * addresses 2509 */ 2510 continue; 2511 } 2512 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2513 &sin6->sin6_addr) != 0) { 2514 continue; 2515 } 2516 if (stcb->asoc.scope.local_scope == 0 && 2517 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2518 continue; 2519 if (stcb->asoc.scope.site_scope == 0 && 2520 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2521 continue; 2522 2523 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2524 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2525 continue; 2526 /* 2527 * found a valid local v6 address to 2528 * use 2529 */ 2530 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2531 SCTP_IPI_ADDR_RUNLOCK(); 2532 return (&sctp_ifa->address.sa); 2533 } 2534 break; 2535 #endif 2536 default: 2537 break; 2538 } 2539 } 2540 } 2541 /* no valid addresses found */ 2542 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2543 SCTP_IPI_ADDR_RUNLOCK(); 2544 return (NULL); 2545 } 2546 2547 static struct sockaddr * 2548 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2549 { 2550 struct sctp_laddr *laddr; 2551 2552 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2553 if (laddr->ifa == NULL) { 2554 continue; 2555 } 2556 /* is the address restricted ? */ 2557 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2558 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2559 continue; 2560 2561 /* found a valid local address to use */ 2562 return (&laddr->ifa->address.sa); 2563 } 2564 /* no valid addresses found */ 2565 return (NULL); 2566 } 2567 2568 /* 2569 * builds an ASCONF chunk from queued ASCONF params. 2570 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2571 */ 2572 struct mbuf * 2573 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2574 { 2575 struct mbuf *m_asconf, *m_asconf_chk; 2576 struct sctp_asconf_addr *aa; 2577 struct sctp_asconf_chunk *acp; 2578 struct sctp_asconf_paramhdr *aph; 2579 struct sctp_asconf_addr_param *aap; 2580 uint32_t p_length; 2581 uint32_t correlation_id = 1; /* 0 is reserved... */ 2582 caddr_t ptr, lookup_ptr; 2583 uint8_t lookup_used = 0; 2584 2585 /* are there any asconf params to send? */ 2586 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2587 if (aa->sent == 0) 2588 break; 2589 } 2590 if (aa == NULL) 2591 return (NULL); 2592 2593 /* 2594 * get a chunk header mbuf and a cluster for the asconf params since 2595 * it's simpler to fill in the asconf chunk header lookup address on 2596 * the fly 2597 */ 2598 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2599 if (m_asconf_chk == NULL) { 2600 /* no mbuf's */ 2601 SCTPDBG(SCTP_DEBUG_ASCONF1, 2602 "compose_asconf: couldn't get chunk mbuf!\n"); 2603 return (NULL); 2604 } 2605 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2606 if (m_asconf == NULL) { 2607 /* no mbuf's */ 2608 SCTPDBG(SCTP_DEBUG_ASCONF1, 2609 "compose_asconf: couldn't get mbuf!\n"); 2610 sctp_m_freem(m_asconf_chk); 2611 return (NULL); 2612 } 2613 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2614 SCTP_BUF_LEN(m_asconf) = 0; 2615 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2616 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2617 /* save pointers to lookup address and asconf params */ 2618 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2619 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2620 2621 /* fill in chunk header info */ 2622 acp->ch.chunk_type = SCTP_ASCONF; 2623 acp->ch.chunk_flags = 0; 2624 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2625 stcb->asoc.asconf_seq_out++; 2626 2627 /* add parameters... up to smallest MTU allowed */ 2628 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2629 if (aa->sent) 2630 continue; 2631 /* get the parameter length */ 2632 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2633 /* will it fit in current chunk? */ 2634 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2635 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2636 /* won't fit, so we're done with this chunk */ 2637 break; 2638 } 2639 /* assign (and store) a correlation id */ 2640 aa->ap.aph.correlation_id = correlation_id++; 2641 2642 /* 2643 * fill in address if we're doing a delete this is a simple 2644 * way for us to fill in the correlation address, which 2645 * should only be used by the peer if we're deleting our 2646 * source address and adding a new address (e.g. renumbering 2647 * case) 2648 */ 2649 if (lookup_used == 0 && 2650 (aa->special_del == 0) && 2651 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2652 struct sctp_ipv6addr_param *lookup; 2653 uint16_t p_size, addr_size; 2654 2655 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2656 lookup->ph.param_type = 2657 htons(aa->ap.addrp.ph.param_type); 2658 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2659 /* copy IPv6 address */ 2660 p_size = sizeof(struct sctp_ipv6addr_param); 2661 addr_size = sizeof(struct in6_addr); 2662 } else { 2663 /* copy IPv4 address */ 2664 p_size = sizeof(struct sctp_ipv4addr_param); 2665 addr_size = sizeof(struct in_addr); 2666 } 2667 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2668 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2669 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2670 lookup_used = 1; 2671 } 2672 /* copy into current space */ 2673 memcpy(ptr, &aa->ap, p_length); 2674 2675 /* network elements and update lengths */ 2676 aph = (struct sctp_asconf_paramhdr *)ptr; 2677 aap = (struct sctp_asconf_addr_param *)ptr; 2678 /* correlation_id is transparent to peer, no htonl needed */ 2679 aph->ph.param_type = htons(aph->ph.param_type); 2680 aph->ph.param_length = htons(aph->ph.param_length); 2681 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2682 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2683 2684 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2685 ptr += SCTP_SIZE32(p_length); 2686 2687 /* 2688 * these params are removed off the pending list upon 2689 * getting an ASCONF-ACK back from the peer, just set flag 2690 */ 2691 aa->sent = 1; 2692 } 2693 /* check to see if the lookup addr has been populated yet */ 2694 if (lookup_used == 0) { 2695 /* NOTE: if the address param is optional, can skip this... */ 2696 /* add any valid (existing) address... */ 2697 struct sctp_ipv6addr_param *lookup; 2698 uint16_t p_size, addr_size; 2699 struct sockaddr *found_addr; 2700 caddr_t addr_ptr; 2701 2702 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2703 found_addr = sctp_find_valid_localaddr(stcb, 2704 addr_locked); 2705 else 2706 found_addr = sctp_find_valid_localaddr_ep(stcb); 2707 2708 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2709 if (found_addr != NULL) { 2710 switch (found_addr->sa_family) { 2711 #ifdef INET6 2712 case AF_INET6: 2713 /* copy IPv6 address */ 2714 lookup->ph.param_type = 2715 htons(SCTP_IPV6_ADDRESS); 2716 p_size = sizeof(struct sctp_ipv6addr_param); 2717 addr_size = sizeof(struct in6_addr); 2718 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2719 found_addr)->sin6_addr; 2720 break; 2721 #endif 2722 #ifdef INET 2723 case AF_INET: 2724 /* copy IPv4 address */ 2725 lookup->ph.param_type = 2726 htons(SCTP_IPV4_ADDRESS); 2727 p_size = sizeof(struct sctp_ipv4addr_param); 2728 addr_size = sizeof(struct in_addr); 2729 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2730 found_addr)->sin_addr; 2731 break; 2732 #endif 2733 default: 2734 p_size = 0; 2735 addr_size = 0; 2736 addr_ptr = NULL; 2737 break; 2738 } 2739 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2740 memcpy(lookup->addr, addr_ptr, addr_size); 2741 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2742 } else { 2743 /* uh oh... don't have any address?? */ 2744 SCTPDBG(SCTP_DEBUG_ASCONF1, 2745 "compose_asconf: no lookup addr!\n"); 2746 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2747 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2748 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2749 bzero(lookup->addr, sizeof(struct in_addr)); 2750 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2751 } 2752 } 2753 /* chain it all together */ 2754 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2755 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2756 acp->ch.chunk_length = htons(*retlen); 2757 2758 return (m_asconf_chk); 2759 } 2760 2761 /* 2762 * section to handle address changes before an association is up eg. changes 2763 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2764 */ 2765 2766 /* 2767 * processes the (local) addresses in the INIT-ACK chunk 2768 */ 2769 static void 2770 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2771 unsigned int offset, unsigned int length) 2772 { 2773 struct sctp_paramhdr tmp_param, *ph; 2774 uint16_t plen, ptype; 2775 struct sctp_ifa *sctp_ifa; 2776 union sctp_sockstore store; 2777 2778 #ifdef INET6 2779 struct sctp_ipv6addr_param addr6_store; 2780 2781 #endif 2782 #ifdef INET 2783 struct sctp_ipv4addr_param addr4_store; 2784 2785 #endif 2786 2787 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2788 if (stcb == NULL) /* Un-needed check for SA */ 2789 return; 2790 2791 /* convert to upper bound */ 2792 length += offset; 2793 2794 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2795 return; 2796 } 2797 /* go through the addresses in the init-ack */ 2798 ph = (struct sctp_paramhdr *) 2799 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2800 (uint8_t *) & tmp_param); 2801 while (ph != NULL) { 2802 ptype = ntohs(ph->param_type); 2803 plen = ntohs(ph->param_length); 2804 switch (ptype) { 2805 #ifdef INET6 2806 case SCTP_IPV6_ADDRESS: 2807 { 2808 struct sctp_ipv6addr_param *a6p; 2809 2810 /* get the entire IPv6 address param */ 2811 a6p = (struct sctp_ipv6addr_param *) 2812 sctp_m_getptr(m, offset, 2813 sizeof(struct sctp_ipv6addr_param), 2814 (uint8_t *) & addr6_store); 2815 if (plen != sizeof(struct sctp_ipv6addr_param) || 2816 a6p == NULL) { 2817 return; 2818 } 2819 memset(&store, 0, sizeof(union sctp_sockstore)); 2820 store.sin6.sin6_family = AF_INET6; 2821 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2822 store.sin6.sin6_port = stcb->rport; 2823 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2824 break; 2825 } 2826 #endif 2827 #ifdef INET 2828 case SCTP_IPV4_ADDRESS: 2829 { 2830 struct sctp_ipv4addr_param *a4p; 2831 2832 /* get the entire IPv4 address param */ 2833 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2834 sizeof(struct sctp_ipv4addr_param), 2835 (uint8_t *) & addr4_store); 2836 if (plen != sizeof(struct sctp_ipv4addr_param) || 2837 a4p == NULL) { 2838 return; 2839 } 2840 memset(&store, 0, sizeof(union sctp_sockstore)); 2841 store.sin.sin_family = AF_INET; 2842 store.sin.sin_len = sizeof(struct sockaddr_in); 2843 store.sin.sin_port = stcb->rport; 2844 store.sin.sin_addr.s_addr = a4p->addr; 2845 break; 2846 } 2847 #endif 2848 default: 2849 goto next_addr; 2850 } 2851 2852 /* see if this address really (still) exists */ 2853 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2854 SCTP_ADDR_NOT_LOCKED); 2855 if (sctp_ifa == NULL) { 2856 /* address doesn't exist anymore */ 2857 int status; 2858 2859 /* are ASCONFs allowed ? */ 2860 if ((sctp_is_feature_on(stcb->sctp_ep, 2861 SCTP_PCB_FLAGS_DO_ASCONF)) && 2862 stcb->asoc.asconf_supported) { 2863 /* queue an ASCONF DEL_IP_ADDRESS */ 2864 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2865 /* 2866 * if queued ok, and in correct state, send 2867 * out the ASCONF. 2868 */ 2869 if (status == 0 && 2870 SCTP_GET_STATE(&stcb->asoc) == 2871 SCTP_STATE_OPEN) { 2872 #ifdef SCTP_TIMER_BASED_ASCONF 2873 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2874 stcb->sctp_ep, stcb, 2875 stcb->asoc.primary_destination); 2876 #else 2877 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2878 #endif 2879 } 2880 } 2881 } 2882 next_addr: 2883 /* 2884 * Sanity check: Make sure the length isn't 0, otherwise 2885 * we'll be stuck in this loop for a long time... 2886 */ 2887 if (SCTP_SIZE32(plen) == 0) { 2888 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2889 plen, ptype); 2890 return; 2891 } 2892 /* get next parameter */ 2893 offset += SCTP_SIZE32(plen); 2894 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2895 return; 2896 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2897 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2898 } /* while */ 2899 } 2900 2901 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2902 /* 2903 * checks to see if a specific address is in the initack address list returns 2904 * 1 if found, 0 if not 2905 */ 2906 static uint32_t 2907 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2908 { 2909 struct sctp_paramhdr tmp_param, *ph; 2910 uint16_t plen, ptype; 2911 2912 #ifdef INET 2913 struct sockaddr_in *sin; 2914 struct sctp_ipv4addr_param *a4p; 2915 struct sctp_ipv6addr_param addr4_store; 2916 2917 #endif 2918 #ifdef INET6 2919 struct sockaddr_in6 *sin6; 2920 struct sctp_ipv6addr_param *a6p; 2921 struct sctp_ipv6addr_param addr6_store; 2922 struct sockaddr_in6 sin6_tmp; 2923 2924 #endif 2925 2926 switch (sa->sa_family) { 2927 #ifdef INET 2928 case AF_INET: 2929 break; 2930 #endif 2931 #ifdef INET6 2932 case AF_INET6: 2933 break; 2934 #endif 2935 default: 2936 return (0); 2937 } 2938 2939 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2940 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2941 /* convert to upper bound */ 2942 length += offset; 2943 2944 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2945 SCTPDBG(SCTP_DEBUG_ASCONF1, 2946 "find_initack_addr: invalid offset?\n"); 2947 return (0); 2948 } 2949 /* go through the addresses in the init-ack */ 2950 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2951 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2952 while (ph != NULL) { 2953 ptype = ntohs(ph->param_type); 2954 plen = ntohs(ph->param_length); 2955 switch (ptype) { 2956 #ifdef INET6 2957 case SCTP_IPV6_ADDRESS: 2958 if (sa->sa_family == AF_INET6) { 2959 /* get the entire IPv6 address param */ 2960 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2961 break; 2962 } 2963 /* get the entire IPv6 address param */ 2964 a6p = (struct sctp_ipv6addr_param *) 2965 sctp_m_getptr(m, offset, 2966 sizeof(struct sctp_ipv6addr_param), 2967 (uint8_t *) & addr6_store); 2968 if (a6p == NULL) { 2969 return (0); 2970 } 2971 sin6 = (struct sockaddr_in6 *)sa; 2972 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2973 /* create a copy and clear scope */ 2974 memcpy(&sin6_tmp, sin6, 2975 sizeof(struct sockaddr_in6)); 2976 sin6 = &sin6_tmp; 2977 in6_clearscope(&sin6->sin6_addr); 2978 } 2979 if (memcmp(&sin6->sin6_addr, a6p->addr, 2980 sizeof(struct in6_addr)) == 0) { 2981 /* found it */ 2982 return (1); 2983 } 2984 } 2985 break; 2986 #endif /* INET6 */ 2987 #ifdef INET 2988 case SCTP_IPV4_ADDRESS: 2989 if (sa->sa_family == AF_INET) { 2990 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2991 break; 2992 } 2993 /* get the entire IPv4 address param */ 2994 a4p = (struct sctp_ipv4addr_param *) 2995 sctp_m_getptr(m, offset, 2996 sizeof(struct sctp_ipv4addr_param), 2997 (uint8_t *) & addr4_store); 2998 if (a4p == NULL) { 2999 return (0); 3000 } 3001 sin = (struct sockaddr_in *)sa; 3002 if (sin->sin_addr.s_addr == a4p->addr) { 3003 /* found it */ 3004 return (1); 3005 } 3006 } 3007 break; 3008 #endif 3009 default: 3010 break; 3011 } 3012 /* get next parameter */ 3013 offset += SCTP_SIZE32(plen); 3014 if (offset + sizeof(struct sctp_paramhdr) > length) { 3015 return (0); 3016 } 3017 ph = (struct sctp_paramhdr *) 3018 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3019 (uint8_t *) & tmp_param); 3020 } /* while */ 3021 /* not found! */ 3022 return (0); 3023 } 3024 3025 /* 3026 * makes sure that the current endpoint local addr list is consistent with 3027 * the new association (eg. subset bound, asconf allowed) adds addresses as 3028 * necessary 3029 */ 3030 static void 3031 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3032 int length, struct sockaddr *init_addr) 3033 { 3034 struct sctp_laddr *laddr; 3035 3036 /* go through the endpoint list */ 3037 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3038 /* be paranoid and validate the laddr */ 3039 if (laddr->ifa == NULL) { 3040 SCTPDBG(SCTP_DEBUG_ASCONF1, 3041 "check_addr_list_ep: laddr->ifa is NULL"); 3042 continue; 3043 } 3044 if (laddr->ifa == NULL) { 3045 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3046 continue; 3047 } 3048 /* do i have it implicitly? */ 3049 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3050 continue; 3051 } 3052 /* check to see if in the init-ack */ 3053 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3054 /* try to add it */ 3055 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3056 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3057 } 3058 } 3059 } 3060 3061 /* 3062 * makes sure that the current kernel address list is consistent with the new 3063 * association (with all addrs bound) adds addresses as necessary 3064 */ 3065 static void 3066 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3067 int length, struct sockaddr *init_addr, 3068 uint16_t local_scope, uint16_t site_scope, 3069 uint16_t ipv4_scope, uint16_t loopback_scope) 3070 { 3071 struct sctp_vrf *vrf = NULL; 3072 struct sctp_ifn *sctp_ifn; 3073 struct sctp_ifa *sctp_ifa; 3074 uint32_t vrf_id; 3075 3076 #ifdef INET 3077 struct sockaddr_in *sin; 3078 3079 #endif 3080 #ifdef INET6 3081 struct sockaddr_in6 *sin6; 3082 3083 #endif 3084 3085 if (stcb) { 3086 vrf_id = stcb->asoc.vrf_id; 3087 } else { 3088 return; 3089 } 3090 SCTP_IPI_ADDR_RLOCK(); 3091 vrf = sctp_find_vrf(vrf_id); 3092 if (vrf == NULL) { 3093 SCTP_IPI_ADDR_RUNLOCK(); 3094 return; 3095 } 3096 /* go through all our known interfaces */ 3097 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3098 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3099 /* skip loopback interface */ 3100 continue; 3101 } 3102 /* go through each interface address */ 3103 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3104 /* do i have it implicitly? */ 3105 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3106 continue; 3107 } 3108 switch (sctp_ifa->address.sa.sa_family) { 3109 #ifdef INET 3110 case AF_INET: 3111 sin = &sctp_ifa->address.sin; 3112 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3113 &sin->sin_addr) != 0) { 3114 continue; 3115 } 3116 if ((ipv4_scope == 0) && 3117 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3118 /* private address not in scope */ 3119 continue; 3120 } 3121 break; 3122 #endif 3123 #ifdef INET6 3124 case AF_INET6: 3125 sin6 = &sctp_ifa->address.sin6; 3126 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3127 &sin6->sin6_addr) != 0) { 3128 continue; 3129 } 3130 if ((local_scope == 0) && 3131 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3132 continue; 3133 } 3134 if ((site_scope == 0) && 3135 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3136 continue; 3137 } 3138 break; 3139 #endif 3140 default: 3141 break; 3142 } 3143 /* check to see if in the init-ack */ 3144 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3145 /* try to add it */ 3146 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3147 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3148 SCTP_ADDR_LOCKED); 3149 } 3150 } /* end foreach ifa */ 3151 } /* end foreach ifn */ 3152 SCTP_IPI_ADDR_RUNLOCK(); 3153 } 3154 3155 /* 3156 * validates an init-ack chunk (from a cookie-echo) with current addresses 3157 * adds addresses from the init-ack into our local address list, if needed 3158 * queues asconf adds/deletes addresses as needed and makes appropriate list 3159 * changes for source address selection m, offset: points to the start of the 3160 * address list in an init-ack chunk length: total length of the address 3161 * params only init_addr: address where my INIT-ACK was sent from 3162 */ 3163 void 3164 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3165 int length, struct sockaddr *init_addr, 3166 uint16_t local_scope, uint16_t site_scope, 3167 uint16_t ipv4_scope, uint16_t loopback_scope) 3168 { 3169 /* process the local addresses in the initack */ 3170 sctp_process_initack_addresses(stcb, m, offset, length); 3171 3172 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3173 /* bound all case */ 3174 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3175 local_scope, site_scope, ipv4_scope, loopback_scope); 3176 } else { 3177 /* subset bound case */ 3178 if (sctp_is_feature_on(stcb->sctp_ep, 3179 SCTP_PCB_FLAGS_DO_ASCONF)) { 3180 /* asconf's allowed */ 3181 sctp_check_address_list_ep(stcb, m, offset, length, 3182 init_addr); 3183 } 3184 /* else, no asconfs allowed, so what we sent is what we get */ 3185 } 3186 } 3187 3188 /* 3189 * sctp_bindx() support 3190 */ 3191 uint32_t 3192 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3193 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3194 { 3195 struct sctp_ifa *ifa; 3196 struct sctp_laddr *laddr, *nladdr; 3197 3198 if (sa->sa_len == 0) { 3199 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3200 return (EINVAL); 3201 } 3202 if (sctp_ifap) { 3203 ifa = sctp_ifap; 3204 } else if (type == SCTP_ADD_IP_ADDRESS) { 3205 /* For an add the address MUST be on the system */ 3206 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3207 } else if (type == SCTP_DEL_IP_ADDRESS) { 3208 /* For a delete we need to find it in the inp */ 3209 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3210 } else { 3211 ifa = NULL; 3212 } 3213 if (ifa != NULL) { 3214 if (type == SCTP_ADD_IP_ADDRESS) { 3215 sctp_add_local_addr_ep(inp, ifa, type); 3216 } else if (type == SCTP_DEL_IP_ADDRESS) { 3217 if (inp->laddr_count < 2) { 3218 /* can't delete the last local address */ 3219 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3220 return (EINVAL); 3221 } 3222 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3223 sctp_nxt_addr) { 3224 if (ifa == laddr->ifa) { 3225 /* Mark in the delete */ 3226 laddr->action = type; 3227 } 3228 } 3229 } 3230 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3231 /* 3232 * There is no need to start the iterator if the inp 3233 * has no associations. 3234 */ 3235 if (type == SCTP_DEL_IP_ADDRESS) { 3236 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3237 if (laddr->ifa == ifa) { 3238 sctp_del_local_addr_ep(inp, ifa); 3239 } 3240 } 3241 } 3242 } else { 3243 struct sctp_asconf_iterator *asc; 3244 struct sctp_laddr *wi; 3245 3246 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3247 sizeof(struct sctp_asconf_iterator), 3248 SCTP_M_ASC_IT); 3249 if (asc == NULL) { 3250 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3251 return (ENOMEM); 3252 } 3253 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3254 if (wi == NULL) { 3255 SCTP_FREE(asc, SCTP_M_ASC_IT); 3256 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3257 return (ENOMEM); 3258 } 3259 LIST_INIT(&asc->list_of_work); 3260 asc->cnt = 1; 3261 SCTP_INCR_LADDR_COUNT(); 3262 wi->ifa = ifa; 3263 wi->action = type; 3264 atomic_add_int(&ifa->refcount, 1); 3265 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3266 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3267 sctp_asconf_iterator_stcb, 3268 sctp_asconf_iterator_ep_end, 3269 SCTP_PCB_ANY_FLAGS, 3270 SCTP_PCB_ANY_FEATURES, 3271 SCTP_ASOC_ANY_STATE, 3272 (void *)asc, 0, 3273 sctp_asconf_iterator_end, inp, 0); 3274 } 3275 return (0); 3276 } else { 3277 /* invalid address! */ 3278 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3279 return (EADDRNOTAVAIL); 3280 } 3281 } 3282 3283 void 3284 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3285 struct sctp_nets *net) 3286 { 3287 struct sctp_asconf_addr *aa; 3288 struct sctp_ifa *sctp_ifap; 3289 struct sctp_asconf_tag_param *vtag; 3290 3291 #ifdef INET 3292 struct sockaddr_in *to; 3293 3294 #endif 3295 #ifdef INET6 3296 struct sockaddr_in6 *to6; 3297 3298 #endif 3299 if (net == NULL) { 3300 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3301 return; 3302 } 3303 if (stcb == NULL) { 3304 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3305 return; 3306 } 3307 /* 3308 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3309 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3310 */ 3311 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3312 SCTP_M_ASC_ADDR); 3313 if (aa == NULL) { 3314 /* didn't get memory */ 3315 SCTPDBG(SCTP_DEBUG_ASCONF1, 3316 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3317 return; 3318 } 3319 aa->special_del = 0; 3320 /* fill in asconf address parameter fields */ 3321 /* top level elements are "networked" during send */ 3322 aa->ifa = NULL; 3323 aa->sent = 0; /* clear sent flag */ 3324 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3325 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3326 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3327 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3328 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3329 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3330 3331 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3332 SCTP_M_ASC_ADDR); 3333 if (aa == NULL) { 3334 /* didn't get memory */ 3335 SCTPDBG(SCTP_DEBUG_ASCONF1, 3336 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3337 return; 3338 } 3339 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3340 /* fill in asconf address parameter fields */ 3341 /* ADD(0.0.0.0) */ 3342 switch (net->ro._l_addr.sa.sa_family) { 3343 #ifdef INET 3344 case AF_INET: 3345 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3346 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3347 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3348 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3349 /* No need to add an address, we are using 0.0.0.0 */ 3350 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3351 break; 3352 #endif 3353 #ifdef INET6 3354 case AF_INET6: 3355 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3356 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3357 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3358 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3359 /* No need to add an address, we are using 0.0.0.0 */ 3360 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3361 break; 3362 #endif 3363 default: 3364 SCTPDBG(SCTP_DEBUG_ASCONF1, 3365 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3366 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3367 return; 3368 } 3369 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3370 SCTP_M_ASC_ADDR); 3371 if (aa == NULL) { 3372 /* didn't get memory */ 3373 SCTPDBG(SCTP_DEBUG_ASCONF1, 3374 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3375 return; 3376 } 3377 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3378 /* fill in asconf address parameter fields */ 3379 /* ADD(0.0.0.0) */ 3380 switch (net->ro._l_addr.sa.sa_family) { 3381 #ifdef INET 3382 case AF_INET: 3383 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3384 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3385 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3386 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3387 /* No need to add an address, we are using 0.0.0.0 */ 3388 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3389 break; 3390 #endif 3391 #ifdef INET6 3392 case AF_INET6: 3393 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3394 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3395 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3396 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3397 /* No need to add an address, we are using 0.0.0.0 */ 3398 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3399 break; 3400 #endif 3401 default: 3402 SCTPDBG(SCTP_DEBUG_ASCONF1, 3403 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3404 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3405 return; 3406 } 3407 /* Now we must hunt the addresses and add all global addresses */ 3408 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3409 struct sctp_vrf *vrf = NULL; 3410 struct sctp_ifn *sctp_ifnp; 3411 uint32_t vrf_id; 3412 3413 vrf_id = stcb->sctp_ep->def_vrf_id; 3414 vrf = sctp_find_vrf(vrf_id); 3415 if (vrf == NULL) { 3416 goto skip_rest; 3417 } 3418 SCTP_IPI_ADDR_RLOCK(); 3419 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3420 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3421 switch (sctp_ifap->address.sa.sa_family) { 3422 #ifdef INET 3423 case AF_INET: 3424 to = &sctp_ifap->address.sin; 3425 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3426 &to->sin_addr) != 0) { 3427 continue; 3428 } 3429 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3430 continue; 3431 } 3432 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3433 continue; 3434 } 3435 break; 3436 #endif 3437 #ifdef INET6 3438 case AF_INET6: 3439 to6 = &sctp_ifap->address.sin6; 3440 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3441 &to6->sin6_addr) != 0) { 3442 continue; 3443 } 3444 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3445 continue; 3446 } 3447 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3448 continue; 3449 } 3450 break; 3451 #endif 3452 default: 3453 continue; 3454 } 3455 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3456 } 3457 } 3458 SCTP_IPI_ADDR_RUNLOCK(); 3459 } else { 3460 struct sctp_laddr *laddr; 3461 3462 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3463 if (laddr->ifa == NULL) { 3464 continue; 3465 } 3466 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3467 /* 3468 * Address being deleted by the system, dont 3469 * list. 3470 */ 3471 continue; 3472 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3473 /* 3474 * Address being deleted on this ep don't 3475 * list. 3476 */ 3477 continue; 3478 } 3479 sctp_ifap = laddr->ifa; 3480 switch (sctp_ifap->address.sa.sa_family) { 3481 #ifdef INET 3482 case AF_INET: 3483 to = &sctp_ifap->address.sin; 3484 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3485 continue; 3486 } 3487 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3488 continue; 3489 } 3490 break; 3491 #endif 3492 #ifdef INET6 3493 case AF_INET6: 3494 to6 = &sctp_ifap->address.sin6; 3495 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3496 continue; 3497 } 3498 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3499 continue; 3500 } 3501 break; 3502 #endif 3503 default: 3504 continue; 3505 } 3506 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3507 } 3508 } 3509 skip_rest: 3510 /* Now we must send the asconf into the queue */ 3511 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3512 } 3513