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, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7); 559 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 560 SCTP_MOBILITY_FASTHANDOFF)) { 561 sctp_assoc_immediate_retrans(stcb, 562 stcb->asoc.primary_destination); 563 } 564 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 565 SCTP_MOBILITY_BASE)) { 566 sctp_move_chunks_from_net(stcb, 567 stcb->asoc.deleted_primary); 568 } 569 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 570 stcb->asoc.deleted_primary); 571 } 572 } else { 573 /* couldn't set the requested primary address! */ 574 SCTPDBG(SCTP_DEBUG_ASCONF1, 575 "process_asconf_set_primary: set primary failed!\n"); 576 /* must have been an invalid address, so report */ 577 m_reply = sctp_asconf_error_response(aph->correlation_id, 578 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 579 aparam_length); 580 } 581 582 return (m_reply); 583 } 584 585 /* 586 * handles an ASCONF chunk. 587 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 588 */ 589 void 590 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 591 struct sockaddr *src, 592 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 593 int first) 594 { 595 struct sctp_association *asoc; 596 uint32_t serial_num; 597 struct mbuf *n, *m_ack, *m_result, *m_tail; 598 struct sctp_asconf_ack_chunk *ack_cp; 599 struct sctp_asconf_paramhdr *aph; 600 struct sctp_ipv6addr_param *p_addr; 601 unsigned int asconf_limit, cnt; 602 int error = 0; /* did an error occur? */ 603 604 /* asconf param buffer */ 605 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 606 struct sctp_asconf_ack *ack, *ack_next; 607 608 /* verify minimum length */ 609 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 610 SCTPDBG(SCTP_DEBUG_ASCONF1, 611 "handle_asconf: chunk too small = %xh\n", 612 ntohs(cp->ch.chunk_length)); 613 return; 614 } 615 asoc = &stcb->asoc; 616 serial_num = ntohl(cp->serial_number); 617 618 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 619 /* got a duplicate ASCONF */ 620 SCTPDBG(SCTP_DEBUG_ASCONF1, 621 "handle_asconf: got duplicate serial number = %xh\n", 622 serial_num); 623 return; 624 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 625 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 626 serial_num, asoc->asconf_seq_in + 1); 627 return; 628 } 629 /* it's the expected "next" sequence number, so process it */ 630 asoc->asconf_seq_in = serial_num; /* update sequence */ 631 /* get length of all the param's in the ASCONF */ 632 asconf_limit = offset + ntohs(cp->ch.chunk_length); 633 SCTPDBG(SCTP_DEBUG_ASCONF1, 634 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 635 asconf_limit, serial_num); 636 637 if (first) { 638 /* delete old cache */ 639 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 640 641 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 642 if (ack->serial_number == serial_num) 643 break; 644 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 645 ack->serial_number, serial_num); 646 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 647 if (ack->data != NULL) { 648 sctp_m_freem(ack->data); 649 } 650 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 651 } 652 } 653 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 654 M_NOWAIT, 1, MT_DATA); 655 if (m_ack == NULL) { 656 SCTPDBG(SCTP_DEBUG_ASCONF1, 657 "handle_asconf: couldn't get mbuf!\n"); 658 return; 659 } 660 m_tail = m_ack; /* current reply chain's tail */ 661 662 /* fill in ASCONF-ACK header */ 663 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 664 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 665 ack_cp->ch.chunk_flags = 0; 666 ack_cp->serial_number = htonl(serial_num); 667 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 668 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 669 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 670 671 /* skip the lookup address parameter */ 672 offset += sizeof(struct sctp_asconf_chunk); 673 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 674 if (p_addr == NULL) { 675 SCTPDBG(SCTP_DEBUG_ASCONF1, 676 "handle_asconf: couldn't get lookup addr!\n"); 677 /* respond with a missing/invalid mandatory parameter error */ 678 return; 679 } 680 /* param_length is already validated in process_control... */ 681 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 682 /* get pointer to first asconf param in ASCONF */ 683 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 684 if (aph == NULL) { 685 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 686 goto send_reply; 687 } 688 /* process through all parameters */ 689 cnt = 0; 690 while (aph != NULL) { 691 unsigned int param_length, param_type; 692 693 param_type = ntohs(aph->ph.param_type); 694 param_length = ntohs(aph->ph.param_length); 695 if (offset + param_length > asconf_limit) { 696 /* parameter goes beyond end of chunk! */ 697 sctp_m_freem(m_ack); 698 return; 699 } 700 m_result = NULL; 701 702 if (param_length > sizeof(aparam_buf)) { 703 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 704 sctp_m_freem(m_ack); 705 return; 706 } 707 if (param_length <= sizeof(struct sctp_paramhdr)) { 708 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 709 sctp_m_freem(m_ack); 710 } 711 /* get the entire parameter */ 712 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 713 if (aph == NULL) { 714 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 715 sctp_m_freem(m_ack); 716 return; 717 } 718 switch (param_type) { 719 case SCTP_ADD_IP_ADDRESS: 720 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 721 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 722 cnt++; 723 break; 724 case SCTP_DEL_IP_ADDRESS: 725 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 726 error); 727 break; 728 case SCTP_ERROR_CAUSE_IND: 729 /* not valid in an ASCONF chunk */ 730 break; 731 case SCTP_SET_PRIM_ADDR: 732 m_result = sctp_process_asconf_set_primary(src, aph, 733 stcb, error); 734 break; 735 case SCTP_NAT_VTAGS: 736 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 737 break; 738 case SCTP_SUCCESS_REPORT: 739 /* not valid in an ASCONF chunk */ 740 break; 741 case SCTP_ULP_ADAPTATION: 742 /* FIX */ 743 break; 744 default: 745 if ((param_type & 0x8000) == 0) { 746 /* Been told to STOP at this param */ 747 asconf_limit = offset; 748 /* 749 * FIX FIX - We need to call 750 * sctp_arethere_unrecognized_parameters() 751 * to get a operr and send it for any 752 * param's with the 0x4000 bit set OR do it 753 * here ourselves... note we still must STOP 754 * if the 0x8000 bit is clear. 755 */ 756 } 757 /* unknown/invalid param type */ 758 break; 759 } /* switch */ 760 761 /* add any (error) result to the reply mbuf chain */ 762 if (m_result != NULL) { 763 SCTP_BUF_NEXT(m_tail) = m_result; 764 m_tail = m_result; 765 /* update lengths, make sure it's aligned too */ 766 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 767 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 768 /* set flag to force success reports */ 769 error = 1; 770 } 771 offset += SCTP_SIZE32(param_length); 772 /* update remaining ASCONF message length to process */ 773 if (offset >= asconf_limit) { 774 /* no more data in the mbuf chain */ 775 break; 776 } 777 /* get pointer to next asconf param */ 778 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 779 sizeof(struct sctp_asconf_paramhdr), 780 (uint8_t *) & aparam_buf); 781 if (aph == NULL) { 782 /* can't get an asconf paramhdr */ 783 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 784 /* FIX ME - add error here... */ 785 } 786 } 787 788 send_reply: 789 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 790 /* save the ASCONF-ACK reply */ 791 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 792 struct sctp_asconf_ack); 793 if (ack == NULL) { 794 sctp_m_freem(m_ack); 795 return; 796 } 797 ack->serial_number = serial_num; 798 ack->last_sent_to = NULL; 799 ack->data = m_ack; 800 ack->len = 0; 801 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 802 ack->len += SCTP_BUF_LEN(n); 803 } 804 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 805 806 /* see if last_control_chunk_from is set properly (use IP src addr) */ 807 if (stcb->asoc.last_control_chunk_from == NULL) { 808 /* 809 * this could happen if the source address was just newly 810 * added 811 */ 812 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 813 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 814 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 815 /* look up the from address */ 816 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 817 #ifdef SCTP_DEBUG 818 if (stcb->asoc.last_control_chunk_from == NULL) { 819 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 820 } 821 #endif 822 } 823 } 824 825 /* 826 * does the address match? returns 0 if not, 1 if so 827 */ 828 static uint32_t 829 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 830 { 831 switch (sa->sa_family) { 832 #ifdef INET6 833 case AF_INET6: 834 { 835 /* XXX scopeid */ 836 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 837 838 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 839 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 840 sizeof(struct in6_addr)) == 0)) { 841 return (1); 842 } 843 break; 844 } 845 #endif 846 #ifdef INET 847 case AF_INET: 848 { 849 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 850 851 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 852 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 853 sizeof(struct in_addr)) == 0)) { 854 return (1); 855 } 856 break; 857 } 858 #endif 859 default: 860 break; 861 } 862 return (0); 863 } 864 865 /* 866 * does the address match? returns 0 if not, 1 if so 867 */ 868 static uint32_t 869 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 870 { 871 #if defined(INET) || defined(INET6) 872 uint16_t param_type, param_length; 873 874 param_type = ntohs(ph->param_type); 875 param_length = ntohs(ph->param_length); 876 #endif 877 switch (sa->sa_family) { 878 #ifdef INET6 879 case AF_INET6: 880 { 881 /* XXX scopeid */ 882 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 883 struct sctp_ipv6addr_param *v6addr; 884 885 v6addr = (struct sctp_ipv6addr_param *)ph; 886 if ((param_type == SCTP_IPV6_ADDRESS) && 887 (param_length == sizeof(struct sctp_ipv6addr_param)) && 888 (memcmp(&v6addr->addr, &sin6->sin6_addr, 889 sizeof(struct in6_addr)) == 0)) { 890 return (1); 891 } 892 break; 893 } 894 #endif 895 #ifdef INET 896 case AF_INET: 897 { 898 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 899 struct sctp_ipv4addr_param *v4addr; 900 901 v4addr = (struct sctp_ipv4addr_param *)ph; 902 if ((param_type == SCTP_IPV4_ADDRESS) && 903 (param_length == sizeof(struct sctp_ipv4addr_param)) && 904 (memcmp(&v4addr->addr, &sin->sin_addr, 905 sizeof(struct in_addr)) == 0)) { 906 return (1); 907 } 908 break; 909 } 910 #endif 911 default: 912 break; 913 } 914 return (0); 915 } 916 917 /* 918 * Cleanup for non-responded/OP ERR'd ASCONF 919 */ 920 void 921 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 922 { 923 /* 924 * clear out any existing asconfs going out 925 */ 926 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 927 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 928 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 929 /* remove the old ASCONF on our outbound queue */ 930 sctp_toss_old_asconf(stcb); 931 } 932 933 /* 934 * cleanup any cached source addresses that may be topologically 935 * incorrect after a new address has been added to this interface. 936 */ 937 static void 938 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 939 { 940 struct sctp_nets *net; 941 942 /* 943 * Ideally, we want to only clear cached routes and source addresses 944 * that are topologically incorrect. But since there is no easy way 945 * to know whether the newly added address on the ifn would cause a 946 * routing change (i.e. a new egress interface would be chosen) 947 * without doing a new routing lookup and source address selection, 948 * we will (for now) just flush any cached route using a different 949 * ifn (and cached source addrs) and let output re-choose them 950 * during the next send on that net. 951 */ 952 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 953 /* 954 * clear any cached route (and cached source address) if the 955 * route's interface is NOT the same as the address change. 956 * If it's the same interface, just clear the cached source 957 * address. 958 */ 959 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 960 ((ifn == NULL) || 961 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 962 /* clear any cached route */ 963 RTFREE(net->ro.ro_rt); 964 net->ro.ro_rt = NULL; 965 } 966 /* clear any cached source address */ 967 if (net->src_addr_selected) { 968 sctp_free_ifa(net->ro._s_addr); 969 net->ro._s_addr = NULL; 970 net->src_addr_selected = 0; 971 } 972 } 973 } 974 975 976 void 977 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 978 { 979 int error; 980 981 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 982 return; 983 } 984 if (stcb->asoc.deleted_primary == NULL) { 985 return; 986 } 987 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 988 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 989 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 990 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 991 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 992 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 993 stcb->asoc.deleted_primary, 994 SCTP_FROM_SCTP_TIMER + SCTP_LOC_8); 995 stcb->asoc.num_send_timers_up--; 996 if (stcb->asoc.num_send_timers_up < 0) { 997 stcb->asoc.num_send_timers_up = 0; 998 } 999 SCTP_TCB_LOCK_ASSERT(stcb); 1000 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1001 stcb->asoc.deleted_primary); 1002 if (error) { 1003 SCTP_INP_DECR_REF(stcb->sctp_ep); 1004 return; 1005 } 1006 SCTP_TCB_LOCK_ASSERT(stcb); 1007 #ifdef SCTP_AUDITING_ENABLED 1008 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1009 #endif 1010 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1011 if ((stcb->asoc.num_send_timers_up == 0) && 1012 (stcb->asoc.sent_queue_cnt > 0)) { 1013 struct sctp_tmit_chunk *chk; 1014 1015 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1016 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1017 stcb, chk->whoTo); 1018 } 1019 } 1020 return; 1021 } 1022 1023 static int 1024 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1025 1026 void 1027 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1028 { 1029 struct sctp_tmit_chunk *chk; 1030 1031 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1032 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1033 SCTP_FROM_SCTP_TIMER + SCTP_LOC_5); 1034 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1035 net->error_count = 0; 1036 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1037 if (chk->whoTo == net) { 1038 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1039 chk->sent = SCTP_DATAGRAM_RESEND; 1040 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1041 sctp_flight_size_decrease(chk); 1042 sctp_total_flight_decrease(stcb, chk); 1043 net->marked_retrans++; 1044 stcb->asoc.marked_retrans++; 1045 } 1046 } 1047 } 1048 if (net->marked_retrans) { 1049 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1050 } 1051 } 1052 1053 static void 1054 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1055 { 1056 struct sctp_nets *net; 1057 int addrnum, changed; 1058 1059 /* 1060 * If number of local valid addresses is 1, the valid address is 1061 * probably newly added address. Several valid addresses in this 1062 * association. A source address may not be changed. Additionally, 1063 * they can be configured on a same interface as "alias" addresses. 1064 * (by micchie) 1065 */ 1066 addrnum = sctp_local_addr_count(stcb); 1067 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1068 addrnum); 1069 if (addrnum == 1) { 1070 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1071 /* clear any cached route and source address */ 1072 if (net->ro.ro_rt) { 1073 RTFREE(net->ro.ro_rt); 1074 net->ro.ro_rt = NULL; 1075 } 1076 if (net->src_addr_selected) { 1077 sctp_free_ifa(net->ro._s_addr); 1078 net->ro._s_addr = NULL; 1079 net->src_addr_selected = 0; 1080 } 1081 /* Retransmit unacknowledged DATA chunks immediately */ 1082 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1083 SCTP_MOBILITY_FASTHANDOFF)) { 1084 sctp_net_immediate_retrans(stcb, net); 1085 } 1086 /* also, SET PRIMARY is maybe already sent */ 1087 } 1088 return; 1089 } 1090 /* Multiple local addresses exsist in the association. */ 1091 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1092 /* clear any cached route and source address */ 1093 if (net->ro.ro_rt) { 1094 RTFREE(net->ro.ro_rt); 1095 net->ro.ro_rt = NULL; 1096 } 1097 if (net->src_addr_selected) { 1098 sctp_free_ifa(net->ro._s_addr); 1099 net->ro._s_addr = NULL; 1100 net->src_addr_selected = 0; 1101 } 1102 /* 1103 * Check if the nexthop is corresponding to the new address. 1104 * If the new address is corresponding to the current 1105 * nexthop, the path will be changed. If the new address is 1106 * NOT corresponding to the current nexthop, the path will 1107 * not be changed. 1108 */ 1109 SCTP_RTALLOC((sctp_route_t *) & net->ro, 1110 stcb->sctp_ep->def_vrf_id); 1111 if (net->ro.ro_rt == NULL) 1112 continue; 1113 1114 changed = 0; 1115 switch (net->ro._l_addr.sa.sa_family) { 1116 #ifdef INET 1117 case AF_INET: 1118 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) { 1119 changed = 1; 1120 } 1121 break; 1122 #endif 1123 #ifdef INET6 1124 case AF_INET6: 1125 if (sctp_v6src_match_nexthop( 1126 &newifa->address.sin6, (sctp_route_t *) & net->ro)) { 1127 changed = 1; 1128 } 1129 break; 1130 #endif 1131 default: 1132 break; 1133 } 1134 /* 1135 * if the newly added address does not relate routing 1136 * information, we skip. 1137 */ 1138 if (changed == 0) 1139 continue; 1140 /* Retransmit unacknowledged DATA chunks immediately */ 1141 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1142 SCTP_MOBILITY_FASTHANDOFF)) { 1143 sctp_net_immediate_retrans(stcb, net); 1144 } 1145 /* Send SET PRIMARY for this new address */ 1146 if (net == stcb->asoc.primary_destination) { 1147 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1148 SCTP_SET_PRIM_ADDR); 1149 } 1150 } 1151 } 1152 1153 /* 1154 * process an ADD/DELETE IP ack from peer. 1155 * addr: corresponding sctp_ifa to the address being added/deleted. 1156 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1157 * flag: 1=success, 0=failure. 1158 */ 1159 static void 1160 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1161 { 1162 /* 1163 * do the necessary asoc list work- if we get a failure indication, 1164 * leave the address on the assoc's restricted list. If we get a 1165 * success indication, remove the address from the restricted list. 1166 */ 1167 /* 1168 * Note: this will only occur for ADD_IP_ADDRESS, since 1169 * DEL_IP_ADDRESS is never actually added to the list... 1170 */ 1171 if (flag) { 1172 /* success case, so remove from the restricted list */ 1173 sctp_del_local_addr_restricted(stcb, addr); 1174 1175 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1176 SCTP_MOBILITY_BASE) || 1177 sctp_is_mobility_feature_on(stcb->sctp_ep, 1178 SCTP_MOBILITY_FASTHANDOFF)) { 1179 sctp_path_check_and_react(stcb, addr); 1180 return; 1181 } 1182 /* clear any cached/topologically incorrect source addresses */ 1183 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1184 } 1185 /* else, leave it on the list */ 1186 } 1187 1188 /* 1189 * add an asconf add/delete/set primary IP address parameter to the queue. 1190 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1191 * returns 0 if queued, -1 if not queued/removed. 1192 * NOTE: if adding, but a delete for the same address is already scheduled 1193 * (and not yet sent out), simply remove it from queue. Same for deleting 1194 * an address already scheduled for add. If a duplicate operation is found, 1195 * ignore the new one. 1196 */ 1197 static int 1198 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1199 uint16_t type) 1200 { 1201 struct sctp_asconf_addr *aa, *aa_next; 1202 1203 /* make sure the request isn't already in the queue */ 1204 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1205 /* address match? */ 1206 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1207 continue; 1208 /* 1209 * is the request already in queue but not sent? pass the 1210 * request already sent in order to resolve the following 1211 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1212 * can't remove the ADD request already sent 3. arrival of 1213 * ADD 1214 */ 1215 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1216 return (-1); 1217 } 1218 /* is the negative request already in queue, and not sent */ 1219 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1220 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1221 /* add requested, delete already queued */ 1222 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1223 /* remove the ifa from the restricted list */ 1224 sctp_del_local_addr_restricted(stcb, ifa); 1225 /* free the asconf param */ 1226 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1227 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1228 return (-1); 1229 } 1230 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1231 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1232 /* delete requested, add already queued */ 1233 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1234 /* remove the aa->ifa from the restricted list */ 1235 sctp_del_local_addr_restricted(stcb, aa->ifa); 1236 /* free the asconf param */ 1237 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1238 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1239 return (-1); 1240 } 1241 } /* for each aa */ 1242 1243 /* adding new request to the queue */ 1244 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1245 SCTP_M_ASC_ADDR); 1246 if (aa == NULL) { 1247 /* didn't get memory */ 1248 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1249 return (-1); 1250 } 1251 aa->special_del = 0; 1252 /* fill in asconf address parameter fields */ 1253 /* top level elements are "networked" during send */ 1254 aa->ap.aph.ph.param_type = type; 1255 aa->ifa = ifa; 1256 atomic_add_int(&ifa->refcount, 1); 1257 /* correlation_id filled in during send routine later... */ 1258 switch (ifa->address.sa.sa_family) { 1259 #ifdef INET6 1260 case AF_INET6: 1261 { 1262 struct sockaddr_in6 *sin6; 1263 1264 sin6 = &ifa->address.sin6; 1265 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1266 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1267 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1268 sizeof(struct sctp_ipv6addr_param); 1269 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1270 sizeof(struct in6_addr)); 1271 break; 1272 } 1273 #endif 1274 #ifdef INET 1275 case AF_INET: 1276 { 1277 struct sockaddr_in *sin; 1278 1279 sin = &ifa->address.sin; 1280 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1281 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1282 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1283 sizeof(struct sctp_ipv4addr_param); 1284 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1285 sizeof(struct in_addr)); 1286 break; 1287 } 1288 #endif 1289 default: 1290 /* invalid family! */ 1291 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1292 sctp_free_ifa(ifa); 1293 return (-1); 1294 } 1295 aa->sent = 0; /* clear sent flag */ 1296 1297 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1298 #ifdef SCTP_DEBUG 1299 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1300 if (type == SCTP_ADD_IP_ADDRESS) { 1301 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1302 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1303 } else if (type == SCTP_DEL_IP_ADDRESS) { 1304 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1305 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1306 } else { 1307 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1308 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1309 } 1310 } 1311 #endif 1312 1313 return (0); 1314 } 1315 1316 1317 /* 1318 * add an asconf operation for the given ifa and type. 1319 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1320 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1321 * advisable. 1322 */ 1323 static int 1324 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1325 uint16_t type) 1326 { 1327 uint32_t status; 1328 int pending_delete_queued = 0; 1329 1330 /* see if peer supports ASCONF */ 1331 if (stcb->asoc.asconf_supported == 0) { 1332 return (-1); 1333 } 1334 /* 1335 * if this is deleting the last address from the assoc, mark it as 1336 * pending. 1337 */ 1338 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending && 1339 (sctp_local_addr_count(stcb) < 2)) { 1340 /* set the pending delete info only */ 1341 stcb->asoc.asconf_del_pending = 1; 1342 stcb->asoc.asconf_addr_del_pending = ifa; 1343 atomic_add_int(&ifa->refcount, 1); 1344 SCTPDBG(SCTP_DEBUG_ASCONF2, 1345 "asconf_queue_add: mark delete last address pending\n"); 1346 return (-1); 1347 } 1348 /* queue an asconf parameter */ 1349 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1350 1351 /* 1352 * if this is an add, and there is a delete also pending (i.e. the 1353 * last local address is being changed), queue the pending delete 1354 * too. 1355 */ 1356 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1357 /* queue in the pending delete */ 1358 if (sctp_asconf_queue_mgmt(stcb, 1359 stcb->asoc.asconf_addr_del_pending, 1360 SCTP_DEL_IP_ADDRESS) == 0) { 1361 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1362 pending_delete_queued = 1; 1363 /* clear out the pending delete info */ 1364 stcb->asoc.asconf_del_pending = 0; 1365 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1366 stcb->asoc.asconf_addr_del_pending = NULL; 1367 } 1368 } 1369 if (pending_delete_queued) { 1370 struct sctp_nets *net; 1371 1372 /* 1373 * since we know that the only/last address is now being 1374 * changed in this case, reset the cwnd/rto on all nets to 1375 * start as a new address and path. Also clear the error 1376 * counts to give the assoc the best chance to complete the 1377 * address change. 1378 */ 1379 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1380 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1381 net); 1382 net->RTO = 0; 1383 net->error_count = 0; 1384 } 1385 stcb->asoc.overall_error_count = 0; 1386 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1387 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1388 stcb->asoc.overall_error_count, 1389 0, 1390 SCTP_FROM_SCTP_ASCONF, 1391 __LINE__); 1392 } 1393 /* queue in an advisory set primary too */ 1394 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1395 /* let caller know we should send this out immediately */ 1396 status = 1; 1397 } 1398 return (status); 1399 } 1400 1401 /*- 1402 * add an asconf delete IP address parameter to the queue by sockaddr and 1403 * possibly with no sctp_ifa available. This is only called by the routine 1404 * that checks the addresses in an INIT-ACK against the current address list. 1405 * returns 0 if completed, non-zero if not completed. 1406 * NOTE: if an add is already scheduled (and not yet sent out), simply 1407 * remove it from queue. If a duplicate operation is found, ignore the 1408 * new one. 1409 */ 1410 static int 1411 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1412 { 1413 struct sctp_ifa *ifa; 1414 struct sctp_asconf_addr *aa, *aa_next; 1415 1416 if (stcb == NULL) { 1417 return (-1); 1418 } 1419 /* see if peer supports ASCONF */ 1420 if (stcb->asoc.asconf_supported == 0) { 1421 return (-1); 1422 } 1423 /* make sure the request isn't already in the queue */ 1424 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1425 /* address match? */ 1426 if (sctp_asconf_addr_match(aa, sa) == 0) 1427 continue; 1428 /* is the request already in queue (sent or not) */ 1429 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1430 return (-1); 1431 } 1432 /* is the negative request already in queue, and not sent */ 1433 if (aa->sent == 1) 1434 continue; 1435 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1436 /* add already queued, so remove existing entry */ 1437 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1438 sctp_del_local_addr_restricted(stcb, aa->ifa); 1439 /* free the entry */ 1440 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1441 return (-1); 1442 } 1443 } /* for each aa */ 1444 1445 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1446 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1447 1448 /* adding new request to the queue */ 1449 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1450 SCTP_M_ASC_ADDR); 1451 if (aa == NULL) { 1452 /* didn't get memory */ 1453 SCTPDBG(SCTP_DEBUG_ASCONF1, 1454 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1455 return (-1); 1456 } 1457 aa->special_del = 0; 1458 /* fill in asconf address parameter fields */ 1459 /* top level elements are "networked" during send */ 1460 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1461 aa->ifa = ifa; 1462 if (ifa) 1463 atomic_add_int(&ifa->refcount, 1); 1464 /* correlation_id filled in during send routine later... */ 1465 switch (sa->sa_family) { 1466 #ifdef INET6 1467 case AF_INET6: 1468 { 1469 /* IPv6 address */ 1470 struct sockaddr_in6 *sin6; 1471 1472 sin6 = (struct sockaddr_in6 *)sa; 1473 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1474 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1475 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1476 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1477 sizeof(struct in6_addr)); 1478 break; 1479 } 1480 #endif 1481 #ifdef INET 1482 case AF_INET: 1483 { 1484 /* IPv4 address */ 1485 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1486 1487 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1488 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1489 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1490 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1491 sizeof(struct in_addr)); 1492 break; 1493 } 1494 #endif 1495 default: 1496 /* invalid family! */ 1497 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1498 if (ifa) 1499 sctp_free_ifa(ifa); 1500 return (-1); 1501 } 1502 aa->sent = 0; /* clear sent flag */ 1503 1504 /* delete goes to the back of the queue */ 1505 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1506 1507 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1508 return (0); 1509 } 1510 1511 /* 1512 * find a specific asconf param on our "sent" queue 1513 */ 1514 static struct sctp_asconf_addr * 1515 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1516 { 1517 struct sctp_asconf_addr *aa; 1518 1519 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1520 if (aa->ap.aph.correlation_id == correlation_id && 1521 aa->sent == 1) { 1522 /* found it */ 1523 return (aa); 1524 } 1525 } 1526 /* didn't find it */ 1527 return (NULL); 1528 } 1529 1530 /* 1531 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1532 * notifications based on the error response 1533 */ 1534 static void 1535 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1536 struct sctp_asconf_paramhdr *aph) 1537 { 1538 struct sctp_error_cause *eh; 1539 struct sctp_paramhdr *ph; 1540 uint16_t param_type; 1541 uint16_t error_code; 1542 1543 eh = (struct sctp_error_cause *)(aph + 1); 1544 ph = (struct sctp_paramhdr *)(eh + 1); 1545 /* validate lengths */ 1546 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1547 htons(aph->ph.param_length)) { 1548 /* invalid error cause length */ 1549 SCTPDBG(SCTP_DEBUG_ASCONF1, 1550 "asconf_process_error: cause element too long\n"); 1551 return; 1552 } 1553 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1554 htons(eh->length)) { 1555 /* invalid included TLV length */ 1556 SCTPDBG(SCTP_DEBUG_ASCONF1, 1557 "asconf_process_error: included TLV too long\n"); 1558 return; 1559 } 1560 /* which error code ? */ 1561 error_code = ntohs(eh->code); 1562 param_type = ntohs(aph->ph.param_type); 1563 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1564 switch (error_code) { 1565 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1566 /* we allow ourselves to "try again" for this error */ 1567 break; 1568 default: 1569 /* peer can't handle it... */ 1570 switch (param_type) { 1571 case SCTP_ADD_IP_ADDRESS: 1572 case SCTP_DEL_IP_ADDRESS: 1573 case SCTP_SET_PRIM_ADDR: 1574 break; 1575 default: 1576 break; 1577 } 1578 } 1579 } 1580 1581 /* 1582 * process an asconf queue param. 1583 * aparam: parameter to process, will be removed from the queue. 1584 * flag: 1=success case, 0=failure case 1585 */ 1586 static void 1587 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1588 struct sctp_asconf_addr *aparam, uint32_t flag) 1589 { 1590 uint16_t param_type; 1591 1592 /* process this param */ 1593 param_type = aparam->ap.aph.ph.param_type; 1594 switch (param_type) { 1595 case SCTP_ADD_IP_ADDRESS: 1596 SCTPDBG(SCTP_DEBUG_ASCONF1, 1597 "process_param_ack: added IP address\n"); 1598 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1599 break; 1600 case SCTP_DEL_IP_ADDRESS: 1601 SCTPDBG(SCTP_DEBUG_ASCONF1, 1602 "process_param_ack: deleted IP address\n"); 1603 /* nothing really to do... lists already updated */ 1604 break; 1605 case SCTP_SET_PRIM_ADDR: 1606 SCTPDBG(SCTP_DEBUG_ASCONF1, 1607 "process_param_ack: set primary IP address\n"); 1608 /* nothing to do... peer may start using this addr */ 1609 break; 1610 default: 1611 /* should NEVER happen */ 1612 break; 1613 } 1614 1615 /* remove the param and free it */ 1616 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1617 if (aparam->ifa) 1618 sctp_free_ifa(aparam->ifa); 1619 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1620 } 1621 1622 /* 1623 * cleanup from a bad asconf ack parameter 1624 */ 1625 static void 1626 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1627 { 1628 /* assume peer doesn't really know how to do asconfs */ 1629 /* XXX we could free the pending queue here */ 1630 1631 } 1632 1633 void 1634 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1635 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1636 struct sctp_nets *net, int *abort_no_unlock) 1637 { 1638 struct sctp_association *asoc; 1639 uint32_t serial_num; 1640 uint16_t ack_length; 1641 struct sctp_asconf_paramhdr *aph; 1642 struct sctp_asconf_addr *aa, *aa_next; 1643 uint32_t last_error_id = 0; /* last error correlation id */ 1644 uint32_t id; 1645 struct sctp_asconf_addr *ap; 1646 1647 /* asconf param buffer */ 1648 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1649 1650 /* verify minimum length */ 1651 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1652 SCTPDBG(SCTP_DEBUG_ASCONF1, 1653 "handle_asconf_ack: chunk too small = %xh\n", 1654 ntohs(cp->ch.chunk_length)); 1655 return; 1656 } 1657 asoc = &stcb->asoc; 1658 serial_num = ntohl(cp->serial_number); 1659 1660 /* 1661 * NOTE: we may want to handle this differently- currently, we will 1662 * abort when we get an ack for the expected serial number + 1 (eg. 1663 * we didn't send it), process an ack normally if it is the expected 1664 * serial number, and re-send the previous ack for *ALL* other 1665 * serial numbers 1666 */ 1667 1668 /* 1669 * if the serial number is the next expected, but I didn't send it, 1670 * abort the asoc, since someone probably just hijacked us... 1671 */ 1672 if (serial_num == (asoc->asconf_seq_out + 1)) { 1673 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1674 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED); 1675 *abort_no_unlock = 1; 1676 return; 1677 } 1678 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1679 /* got a duplicate/unexpected ASCONF-ACK */ 1680 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1681 serial_num, asoc->asconf_seq_out_acked + 1); 1682 return; 1683 } 1684 if (serial_num == asoc->asconf_seq_out - 1) { 1685 /* stop our timer */ 1686 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1687 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1688 } 1689 /* process the ASCONF-ACK contents */ 1690 ack_length = ntohs(cp->ch.chunk_length) - 1691 sizeof(struct sctp_asconf_ack_chunk); 1692 offset += sizeof(struct sctp_asconf_ack_chunk); 1693 /* process through all parameters */ 1694 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1695 unsigned int param_length, param_type; 1696 1697 /* get pointer to next asconf parameter */ 1698 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1699 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1700 if (aph == NULL) { 1701 /* can't get an asconf paramhdr */ 1702 sctp_asconf_ack_clear(stcb); 1703 return; 1704 } 1705 param_type = ntohs(aph->ph.param_type); 1706 param_length = ntohs(aph->ph.param_length); 1707 if (param_length > ack_length) { 1708 sctp_asconf_ack_clear(stcb); 1709 return; 1710 } 1711 if (param_length < sizeof(struct sctp_paramhdr)) { 1712 sctp_asconf_ack_clear(stcb); 1713 return; 1714 } 1715 /* get the complete parameter... */ 1716 if (param_length > sizeof(aparam_buf)) { 1717 SCTPDBG(SCTP_DEBUG_ASCONF1, 1718 "param length (%u) larger than buffer size!\n", param_length); 1719 sctp_asconf_ack_clear(stcb); 1720 return; 1721 } 1722 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1723 if (aph == NULL) { 1724 sctp_asconf_ack_clear(stcb); 1725 return; 1726 } 1727 /* correlation_id is transparent to peer, no ntohl needed */ 1728 id = aph->correlation_id; 1729 1730 switch (param_type) { 1731 case SCTP_ERROR_CAUSE_IND: 1732 last_error_id = id; 1733 /* find the corresponding asconf param in our queue */ 1734 ap = sctp_asconf_find_param(stcb, id); 1735 if (ap == NULL) { 1736 /* hmm... can't find this in our queue! */ 1737 break; 1738 } 1739 /* process the parameter, failed flag */ 1740 sctp_asconf_process_param_ack(stcb, ap, 0); 1741 /* process the error response */ 1742 sctp_asconf_process_error(stcb, aph); 1743 break; 1744 case SCTP_SUCCESS_REPORT: 1745 /* find the corresponding asconf param in our queue */ 1746 ap = sctp_asconf_find_param(stcb, id); 1747 if (ap == NULL) { 1748 /* hmm... can't find this in our queue! */ 1749 break; 1750 } 1751 /* process the parameter, success flag */ 1752 sctp_asconf_process_param_ack(stcb, ap, 1); 1753 break; 1754 default: 1755 break; 1756 } /* switch */ 1757 1758 /* update remaining ASCONF-ACK message length to process */ 1759 ack_length -= SCTP_SIZE32(param_length); 1760 if (ack_length <= 0) { 1761 /* no more data in the mbuf chain */ 1762 break; 1763 } 1764 offset += SCTP_SIZE32(param_length); 1765 } /* while */ 1766 1767 /* 1768 * if there are any "sent" params still on the queue, these are 1769 * implicitly "success", or "failed" (if we got an error back) ... 1770 * so process these appropriately 1771 * 1772 * we assume that the correlation_id's are monotonically increasing 1773 * beginning from 1 and that we don't have *that* many outstanding 1774 * at any given time 1775 */ 1776 if (last_error_id == 0) 1777 last_error_id--;/* set to "max" value */ 1778 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1779 if (aa->sent == 1) { 1780 /* 1781 * implicitly successful or failed if correlation_id 1782 * < last_error_id, then success else, failure 1783 */ 1784 if (aa->ap.aph.correlation_id < last_error_id) 1785 sctp_asconf_process_param_ack(stcb, aa, 1); 1786 else 1787 sctp_asconf_process_param_ack(stcb, aa, 0); 1788 } else { 1789 /* 1790 * since we always process in order (FIFO queue) if 1791 * we reach one that hasn't been sent, the rest 1792 * should not have been sent either. so, we're 1793 * done... 1794 */ 1795 break; 1796 } 1797 } 1798 1799 /* update the next sequence number to use */ 1800 asoc->asconf_seq_out_acked++; 1801 /* remove the old ASCONF on our outbound queue */ 1802 sctp_toss_old_asconf(stcb); 1803 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1804 #ifdef SCTP_TIMER_BASED_ASCONF 1805 /* we have more params, so restart our timer */ 1806 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1807 stcb, net); 1808 #else 1809 /* we have more params, so send out more */ 1810 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1811 #endif 1812 } 1813 } 1814 1815 #ifdef INET6 1816 static uint32_t 1817 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1818 { 1819 struct sockaddr_in6 *sin6, *net6; 1820 struct sctp_nets *net; 1821 1822 if (sa->sa_family != AF_INET6) { 1823 /* wrong family */ 1824 return (0); 1825 } 1826 sin6 = (struct sockaddr_in6 *)sa; 1827 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1828 /* not link local address */ 1829 return (0); 1830 } 1831 /* hunt through our destination nets list for this scope_id */ 1832 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1833 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1834 AF_INET6) 1835 continue; 1836 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1837 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1838 continue; 1839 if (sctp_is_same_scope(sin6, net6)) { 1840 /* found one */ 1841 return (1); 1842 } 1843 } 1844 /* didn't find one */ 1845 return (0); 1846 } 1847 1848 #endif 1849 1850 /* 1851 * address management functions 1852 */ 1853 static void 1854 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1855 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1856 { 1857 int status; 1858 1859 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1860 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1861 /* subset bound, no ASCONF allowed case, so ignore */ 1862 return; 1863 } 1864 /* 1865 * note: we know this is not the subset bound, no ASCONF case eg. 1866 * this is boundall or subset bound w/ASCONF allowed 1867 */ 1868 1869 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1870 switch (ifa->address.sa.sa_family) { 1871 #ifdef INET6 1872 case AF_INET6: 1873 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1874 &ifa->address.sin6.sin6_addr) != 0) { 1875 return; 1876 } 1877 break; 1878 #endif 1879 #ifdef INET 1880 case AF_INET: 1881 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1882 &ifa->address.sin.sin_addr) != 0) { 1883 return; 1884 } 1885 break; 1886 #endif 1887 default: 1888 return; 1889 } 1890 #ifdef INET6 1891 /* make sure we're "allowed" to add this type of addr */ 1892 if (ifa->address.sa.sa_family == AF_INET6) { 1893 /* invalid if we're not a v6 endpoint */ 1894 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1895 return; 1896 /* is the v6 addr really valid ? */ 1897 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1898 return; 1899 } 1900 } 1901 #endif 1902 /* put this address on the "pending/do not use yet" list */ 1903 sctp_add_local_addr_restricted(stcb, ifa); 1904 /* 1905 * check address scope if address is out of scope, don't queue 1906 * anything... note: this would leave the address on both inp and 1907 * asoc lists 1908 */ 1909 switch (ifa->address.sa.sa_family) { 1910 #ifdef INET6 1911 case AF_INET6: 1912 { 1913 struct sockaddr_in6 *sin6; 1914 1915 sin6 = &ifa->address.sin6; 1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1917 /* we skip unspecifed addresses */ 1918 return; 1919 } 1920 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1921 if (stcb->asoc.scope.local_scope == 0) { 1922 return; 1923 } 1924 /* is it the right link local scope? */ 1925 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1926 return; 1927 } 1928 } 1929 if (stcb->asoc.scope.site_scope == 0 && 1930 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1931 return; 1932 } 1933 break; 1934 } 1935 #endif 1936 #ifdef INET 1937 case AF_INET: 1938 { 1939 struct sockaddr_in *sin; 1940 struct in6pcb *inp6; 1941 1942 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1943 /* invalid if we are a v6 only endpoint */ 1944 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1945 SCTP_IPV6_V6ONLY(inp6)) 1946 return; 1947 1948 sin = &ifa->address.sin; 1949 if (sin->sin_addr.s_addr == 0) { 1950 /* we skip unspecifed addresses */ 1951 return; 1952 } 1953 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1954 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1955 return; 1956 } 1957 break; 1958 } 1959 #endif 1960 default: 1961 /* else, not AF_INET or AF_INET6, so skip */ 1962 return; 1963 } 1964 1965 /* queue an asconf for this address add/delete */ 1966 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1967 /* does the peer do asconf? */ 1968 if (stcb->asoc.asconf_supported) { 1969 /* queue an asconf for this addr */ 1970 status = sctp_asconf_queue_add(stcb, ifa, type); 1971 1972 /* 1973 * if queued ok, and in the open state, send out the 1974 * ASCONF. If in the non-open state, these will be 1975 * sent when the state goes open. 1976 */ 1977 if (status == 0 && 1978 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1979 #ifdef SCTP_TIMER_BASED_ASCONF 1980 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1981 stcb, stcb->asoc.primary_destination); 1982 #else 1983 sctp_send_asconf(stcb, NULL, addr_locked); 1984 #endif 1985 } 1986 } 1987 } 1988 } 1989 1990 1991 int 1992 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 1993 { 1994 struct sctp_asconf_iterator *asc; 1995 struct sctp_ifa *ifa; 1996 struct sctp_laddr *l; 1997 int cnt_invalid = 0; 1998 1999 asc = (struct sctp_asconf_iterator *)ptr; 2000 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2001 ifa = l->ifa; 2002 switch (ifa->address.sa.sa_family) { 2003 #ifdef INET6 2004 case AF_INET6: 2005 /* invalid if we're not a v6 endpoint */ 2006 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2007 cnt_invalid++; 2008 if (asc->cnt == cnt_invalid) 2009 return (1); 2010 } 2011 break; 2012 #endif 2013 #ifdef INET 2014 case AF_INET: 2015 { 2016 /* invalid if we are a v6 only endpoint */ 2017 struct in6pcb *inp6; 2018 2019 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2020 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2021 SCTP_IPV6_V6ONLY(inp6)) { 2022 cnt_invalid++; 2023 if (asc->cnt == cnt_invalid) 2024 return (1); 2025 } 2026 break; 2027 } 2028 #endif 2029 default: 2030 /* invalid address family */ 2031 cnt_invalid++; 2032 if (asc->cnt == cnt_invalid) 2033 return (1); 2034 } 2035 } 2036 return (0); 2037 } 2038 2039 static int 2040 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2041 { 2042 struct sctp_ifa *ifa; 2043 struct sctp_asconf_iterator *asc; 2044 struct sctp_laddr *laddr, *nladdr, *l; 2045 2046 /* Only for specific case not bound all */ 2047 asc = (struct sctp_asconf_iterator *)ptr; 2048 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2049 ifa = l->ifa; 2050 if (l->action == SCTP_ADD_IP_ADDRESS) { 2051 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2052 sctp_nxt_addr) { 2053 if (laddr->ifa == ifa) { 2054 laddr->action = 0; 2055 break; 2056 } 2057 } 2058 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2059 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2060 /* remove only after all guys are done */ 2061 if (laddr->ifa == ifa) { 2062 sctp_del_local_addr_ep(inp, ifa); 2063 } 2064 } 2065 } 2066 } 2067 return (0); 2068 } 2069 2070 void 2071 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2072 void *ptr, uint32_t val SCTP_UNUSED) 2073 { 2074 struct sctp_asconf_iterator *asc; 2075 struct sctp_ifa *ifa; 2076 struct sctp_laddr *l; 2077 int cnt_invalid = 0; 2078 int type, status; 2079 int num_queued = 0; 2080 2081 asc = (struct sctp_asconf_iterator *)ptr; 2082 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2083 ifa = l->ifa; 2084 type = l->action; 2085 2086 /* address's vrf_id must be the vrf_id of the assoc */ 2087 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2088 continue; 2089 } 2090 /* Same checks again for assoc */ 2091 switch (ifa->address.sa.sa_family) { 2092 #ifdef INET6 2093 case AF_INET6: 2094 { 2095 /* invalid if we're not a v6 endpoint */ 2096 struct sockaddr_in6 *sin6; 2097 2098 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2099 cnt_invalid++; 2100 if (asc->cnt == cnt_invalid) 2101 return; 2102 else 2103 continue; 2104 } 2105 sin6 = &ifa->address.sin6; 2106 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2107 /* we skip unspecifed addresses */ 2108 continue; 2109 } 2110 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2111 &sin6->sin6_addr) != 0) { 2112 continue; 2113 } 2114 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2115 if (stcb->asoc.scope.local_scope == 0) { 2116 continue; 2117 } 2118 /* is it the right link local scope? */ 2119 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2120 continue; 2121 } 2122 } 2123 break; 2124 } 2125 #endif 2126 #ifdef INET 2127 case AF_INET: 2128 { 2129 /* invalid if we are a v6 only endpoint */ 2130 struct in6pcb *inp6; 2131 struct sockaddr_in *sin; 2132 2133 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2134 /* invalid if we are a v6 only endpoint */ 2135 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2136 SCTP_IPV6_V6ONLY(inp6)) 2137 continue; 2138 2139 sin = &ifa->address.sin; 2140 if (sin->sin_addr.s_addr == 0) { 2141 /* we skip unspecifed addresses */ 2142 continue; 2143 } 2144 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2145 &sin->sin_addr) != 0) { 2146 continue; 2147 } 2148 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2149 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2150 continue; 2151 } 2152 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2153 SCTP_IPV6_V6ONLY(inp6)) { 2154 cnt_invalid++; 2155 if (asc->cnt == cnt_invalid) 2156 return; 2157 else 2158 continue; 2159 } 2160 break; 2161 } 2162 #endif 2163 default: 2164 /* invalid address family */ 2165 cnt_invalid++; 2166 if (asc->cnt == cnt_invalid) 2167 return; 2168 else 2169 continue; 2170 break; 2171 } 2172 2173 if (type == SCTP_ADD_IP_ADDRESS) { 2174 /* prevent this address from being used as a source */ 2175 sctp_add_local_addr_restricted(stcb, ifa); 2176 } else if (type == SCTP_DEL_IP_ADDRESS) { 2177 struct sctp_nets *net; 2178 2179 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2180 sctp_rtentry_t *rt; 2181 2182 /* delete this address if cached */ 2183 if (net->ro._s_addr == ifa) { 2184 sctp_free_ifa(net->ro._s_addr); 2185 net->ro._s_addr = NULL; 2186 net->src_addr_selected = 0; 2187 rt = net->ro.ro_rt; 2188 if (rt) { 2189 RTFREE(rt); 2190 net->ro.ro_rt = NULL; 2191 } 2192 /* 2193 * Now we deleted our src address, 2194 * should we not also now reset the 2195 * cwnd/rto to start as if its a new 2196 * address? 2197 */ 2198 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2199 net->RTO = 0; 2200 2201 } 2202 } 2203 } else if (type == SCTP_SET_PRIM_ADDR) { 2204 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2205 /* must validate the ifa is in the ep */ 2206 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2207 continue; 2208 } 2209 } else { 2210 /* Need to check scopes for this guy */ 2211 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2212 continue; 2213 } 2214 } 2215 } 2216 /* queue an asconf for this address add/delete */ 2217 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2218 stcb->asoc.asconf_supported == 1) { 2219 /* queue an asconf for this addr */ 2220 status = sctp_asconf_queue_add(stcb, ifa, type); 2221 /* 2222 * if queued ok, and in the open state, update the 2223 * count of queued params. If in the non-open 2224 * state, these get sent when the assoc goes open. 2225 */ 2226 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2227 if (status >= 0) { 2228 num_queued++; 2229 } 2230 } 2231 } 2232 } 2233 /* 2234 * If we have queued params in the open state, send out an ASCONF. 2235 */ 2236 if (num_queued > 0) { 2237 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2238 } 2239 } 2240 2241 void 2242 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2243 { 2244 struct sctp_asconf_iterator *asc; 2245 struct sctp_ifa *ifa; 2246 struct sctp_laddr *l, *nl; 2247 2248 asc = (struct sctp_asconf_iterator *)ptr; 2249 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2250 ifa = l->ifa; 2251 if (l->action == SCTP_ADD_IP_ADDRESS) { 2252 /* Clear the defer use flag */ 2253 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2254 } 2255 sctp_free_ifa(ifa); 2256 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2257 SCTP_DECR_LADDR_COUNT(); 2258 } 2259 SCTP_FREE(asc, SCTP_M_ASC_IT); 2260 } 2261 2262 /* 2263 * sa is the sockaddr to ask the peer to set primary to. 2264 * returns: 0 = completed, -1 = error 2265 */ 2266 int32_t 2267 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2268 { 2269 uint32_t vrf_id; 2270 struct sctp_ifa *ifa; 2271 2272 /* find the ifa for the desired set primary */ 2273 vrf_id = stcb->asoc.vrf_id; 2274 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2275 if (ifa == NULL) { 2276 /* Invalid address */ 2277 return (-1); 2278 } 2279 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2280 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2281 /* set primary queuing succeeded */ 2282 SCTPDBG(SCTP_DEBUG_ASCONF1, 2283 "set_primary_ip_address_sa: queued on tcb=%p, ", 2284 (void *)stcb); 2285 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2286 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2287 #ifdef SCTP_TIMER_BASED_ASCONF 2288 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2289 stcb->sctp_ep, stcb, 2290 stcb->asoc.primary_destination); 2291 #else 2292 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2293 #endif 2294 } 2295 } else { 2296 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2297 (void *)stcb); 2298 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2299 return (-1); 2300 } 2301 return (0); 2302 } 2303 2304 void 2305 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2306 { 2307 struct sctp_inpcb *inp; 2308 2309 /* go through all our PCB's */ 2310 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2311 struct sctp_tcb *stcb; 2312 2313 /* process for all associations for this endpoint */ 2314 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2315 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2316 if (!sctp_asconf_queue_add(stcb, ifa, 2317 SCTP_SET_PRIM_ADDR)) { 2318 /* set primary queuing succeeded */ 2319 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2320 (void *)stcb); 2321 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2322 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2323 #ifdef SCTP_TIMER_BASED_ASCONF 2324 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2325 stcb->sctp_ep, stcb, 2326 stcb->asoc.primary_destination); 2327 #else 2328 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2329 #endif 2330 } 2331 } 2332 } /* for each stcb */ 2333 } /* for each inp */ 2334 } 2335 2336 int 2337 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2338 { 2339 struct sctp_tmit_chunk *chk, *nchk; 2340 unsigned int offset, asconf_limit; 2341 struct sctp_asconf_chunk *acp; 2342 struct sctp_asconf_paramhdr *aph; 2343 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2344 struct sctp_paramhdr *ph; 2345 int add_cnt, del_cnt; 2346 uint16_t last_param_type; 2347 2348 add_cnt = del_cnt = 0; 2349 last_param_type = 0; 2350 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2351 if (chk->data == NULL) { 2352 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2353 continue; 2354 } 2355 offset = 0; 2356 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2357 offset += sizeof(struct sctp_asconf_chunk); 2358 asconf_limit = ntohs(acp->ch.chunk_length); 2359 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2360 if (ph == NULL) { 2361 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2362 continue; 2363 } 2364 offset += ntohs(ph->param_length); 2365 2366 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2367 if (aph == NULL) { 2368 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2369 continue; 2370 } 2371 while (aph != NULL) { 2372 unsigned int param_length, param_type; 2373 2374 param_type = ntohs(aph->ph.param_type); 2375 param_length = ntohs(aph->ph.param_length); 2376 if (offset + param_length > asconf_limit) { 2377 /* parameter goes beyond end of chunk! */ 2378 break; 2379 } 2380 if (param_length > sizeof(aparam_buf)) { 2381 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2382 break; 2383 } 2384 if (param_length <= sizeof(struct sctp_paramhdr)) { 2385 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2386 break; 2387 } 2388 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2389 if (aph == NULL) { 2390 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2391 break; 2392 } 2393 ph = (struct sctp_paramhdr *)(aph + 1); 2394 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2395 switch (param_type) { 2396 case SCTP_ADD_IP_ADDRESS: 2397 add_cnt++; 2398 break; 2399 case SCTP_DEL_IP_ADDRESS: 2400 del_cnt++; 2401 break; 2402 default: 2403 break; 2404 } 2405 last_param_type = param_type; 2406 } 2407 offset += SCTP_SIZE32(param_length); 2408 if (offset >= asconf_limit) { 2409 /* no more data in the mbuf chain */ 2410 break; 2411 } 2412 /* get pointer to next asconf param */ 2413 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2414 } 2415 } 2416 2417 /* 2418 * we want to find the sequences which consist of ADD -> DEL -> ADD 2419 * or DEL -> ADD 2420 */ 2421 if (add_cnt > del_cnt || 2422 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2423 return (1); 2424 } 2425 return (0); 2426 } 2427 2428 static struct sockaddr * 2429 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2430 { 2431 struct sctp_vrf *vrf = NULL; 2432 struct sctp_ifn *sctp_ifn; 2433 struct sctp_ifa *sctp_ifa; 2434 2435 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2436 SCTP_IPI_ADDR_RLOCK(); 2437 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2438 if (vrf == NULL) { 2439 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2440 SCTP_IPI_ADDR_RUNLOCK(); 2441 return (NULL); 2442 } 2443 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2444 if (stcb->asoc.scope.loopback_scope == 0 && 2445 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2446 /* Skip if loopback_scope not set */ 2447 continue; 2448 } 2449 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2450 switch (sctp_ifa->address.sa.sa_family) { 2451 #ifdef INET 2452 case AF_INET: 2453 if (stcb->asoc.scope.ipv4_addr_legal) { 2454 struct sockaddr_in *sin; 2455 2456 sin = &sctp_ifa->address.sin; 2457 if (sin->sin_addr.s_addr == 0) { 2458 /* skip unspecifed addresses */ 2459 continue; 2460 } 2461 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2462 &sin->sin_addr) != 0) { 2463 continue; 2464 } 2465 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2466 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2467 continue; 2468 2469 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2470 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2471 continue; 2472 /* 2473 * found a valid local v4 address to 2474 * use 2475 */ 2476 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2477 SCTP_IPI_ADDR_RUNLOCK(); 2478 return (&sctp_ifa->address.sa); 2479 } 2480 break; 2481 #endif 2482 #ifdef INET6 2483 case AF_INET6: 2484 if (stcb->asoc.scope.ipv6_addr_legal) { 2485 struct sockaddr_in6 *sin6; 2486 2487 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2488 continue; 2489 } 2490 sin6 = &sctp_ifa->address.sin6; 2491 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2492 /* 2493 * we skip unspecifed 2494 * addresses 2495 */ 2496 continue; 2497 } 2498 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2499 &sin6->sin6_addr) != 0) { 2500 continue; 2501 } 2502 if (stcb->asoc.scope.local_scope == 0 && 2503 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2504 continue; 2505 if (stcb->asoc.scope.site_scope == 0 && 2506 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2507 continue; 2508 2509 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2510 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2511 continue; 2512 /* 2513 * found a valid local v6 address to 2514 * use 2515 */ 2516 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2517 SCTP_IPI_ADDR_RUNLOCK(); 2518 return (&sctp_ifa->address.sa); 2519 } 2520 break; 2521 #endif 2522 default: 2523 break; 2524 } 2525 } 2526 } 2527 /* no valid addresses found */ 2528 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2529 SCTP_IPI_ADDR_RUNLOCK(); 2530 return (NULL); 2531 } 2532 2533 static struct sockaddr * 2534 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2535 { 2536 struct sctp_laddr *laddr; 2537 2538 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2539 if (laddr->ifa == NULL) { 2540 continue; 2541 } 2542 /* is the address restricted ? */ 2543 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2544 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2545 continue; 2546 2547 /* found a valid local address to use */ 2548 return (&laddr->ifa->address.sa); 2549 } 2550 /* no valid addresses found */ 2551 return (NULL); 2552 } 2553 2554 /* 2555 * builds an ASCONF chunk from queued ASCONF params. 2556 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2557 */ 2558 struct mbuf * 2559 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2560 { 2561 struct mbuf *m_asconf, *m_asconf_chk; 2562 struct sctp_asconf_addr *aa; 2563 struct sctp_asconf_chunk *acp; 2564 struct sctp_asconf_paramhdr *aph; 2565 struct sctp_asconf_addr_param *aap; 2566 uint32_t p_length; 2567 uint32_t correlation_id = 1; /* 0 is reserved... */ 2568 caddr_t ptr, lookup_ptr; 2569 uint8_t lookup_used = 0; 2570 2571 /* are there any asconf params to send? */ 2572 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2573 if (aa->sent == 0) 2574 break; 2575 } 2576 if (aa == NULL) 2577 return (NULL); 2578 2579 /* 2580 * get a chunk header mbuf and a cluster for the asconf params since 2581 * it's simpler to fill in the asconf chunk header lookup address on 2582 * the fly 2583 */ 2584 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2585 if (m_asconf_chk == NULL) { 2586 /* no mbuf's */ 2587 SCTPDBG(SCTP_DEBUG_ASCONF1, 2588 "compose_asconf: couldn't get chunk mbuf!\n"); 2589 return (NULL); 2590 } 2591 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2592 if (m_asconf == NULL) { 2593 /* no mbuf's */ 2594 SCTPDBG(SCTP_DEBUG_ASCONF1, 2595 "compose_asconf: couldn't get mbuf!\n"); 2596 sctp_m_freem(m_asconf_chk); 2597 return (NULL); 2598 } 2599 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2600 SCTP_BUF_LEN(m_asconf) = 0; 2601 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2602 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2603 /* save pointers to lookup address and asconf params */ 2604 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2605 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2606 2607 /* fill in chunk header info */ 2608 acp->ch.chunk_type = SCTP_ASCONF; 2609 acp->ch.chunk_flags = 0; 2610 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2611 stcb->asoc.asconf_seq_out++; 2612 2613 /* add parameters... up to smallest MTU allowed */ 2614 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2615 if (aa->sent) 2616 continue; 2617 /* get the parameter length */ 2618 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2619 /* will it fit in current chunk? */ 2620 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2621 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2622 /* won't fit, so we're done with this chunk */ 2623 break; 2624 } 2625 /* assign (and store) a correlation id */ 2626 aa->ap.aph.correlation_id = correlation_id++; 2627 2628 /* 2629 * fill in address if we're doing a delete this is a simple 2630 * way for us to fill in the correlation address, which 2631 * should only be used by the peer if we're deleting our 2632 * source address and adding a new address (e.g. renumbering 2633 * case) 2634 */ 2635 if (lookup_used == 0 && 2636 (aa->special_del == 0) && 2637 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2638 struct sctp_ipv6addr_param *lookup; 2639 uint16_t p_size, addr_size; 2640 2641 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2642 lookup->ph.param_type = 2643 htons(aa->ap.addrp.ph.param_type); 2644 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2645 /* copy IPv6 address */ 2646 p_size = sizeof(struct sctp_ipv6addr_param); 2647 addr_size = sizeof(struct in6_addr); 2648 } else { 2649 /* copy IPv4 address */ 2650 p_size = sizeof(struct sctp_ipv4addr_param); 2651 addr_size = sizeof(struct in_addr); 2652 } 2653 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2654 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2655 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2656 lookup_used = 1; 2657 } 2658 /* copy into current space */ 2659 memcpy(ptr, &aa->ap, p_length); 2660 2661 /* network elements and update lengths */ 2662 aph = (struct sctp_asconf_paramhdr *)ptr; 2663 aap = (struct sctp_asconf_addr_param *)ptr; 2664 /* correlation_id is transparent to peer, no htonl needed */ 2665 aph->ph.param_type = htons(aph->ph.param_type); 2666 aph->ph.param_length = htons(aph->ph.param_length); 2667 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2668 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2669 2670 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2671 ptr += SCTP_SIZE32(p_length); 2672 2673 /* 2674 * these params are removed off the pending list upon 2675 * getting an ASCONF-ACK back from the peer, just set flag 2676 */ 2677 aa->sent = 1; 2678 } 2679 /* check to see if the lookup addr has been populated yet */ 2680 if (lookup_used == 0) { 2681 /* NOTE: if the address param is optional, can skip this... */ 2682 /* add any valid (existing) address... */ 2683 struct sctp_ipv6addr_param *lookup; 2684 uint16_t p_size, addr_size; 2685 struct sockaddr *found_addr; 2686 caddr_t addr_ptr; 2687 2688 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2689 found_addr = sctp_find_valid_localaddr(stcb, 2690 addr_locked); 2691 else 2692 found_addr = sctp_find_valid_localaddr_ep(stcb); 2693 2694 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2695 if (found_addr != NULL) { 2696 switch (found_addr->sa_family) { 2697 #ifdef INET6 2698 case AF_INET6: 2699 /* copy IPv6 address */ 2700 lookup->ph.param_type = 2701 htons(SCTP_IPV6_ADDRESS); 2702 p_size = sizeof(struct sctp_ipv6addr_param); 2703 addr_size = sizeof(struct in6_addr); 2704 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2705 found_addr)->sin6_addr; 2706 break; 2707 #endif 2708 #ifdef INET 2709 case AF_INET: 2710 /* copy IPv4 address */ 2711 lookup->ph.param_type = 2712 htons(SCTP_IPV4_ADDRESS); 2713 p_size = sizeof(struct sctp_ipv4addr_param); 2714 addr_size = sizeof(struct in_addr); 2715 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2716 found_addr)->sin_addr; 2717 break; 2718 #endif 2719 default: 2720 p_size = 0; 2721 addr_size = 0; 2722 addr_ptr = NULL; 2723 break; 2724 } 2725 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2726 memcpy(lookup->addr, addr_ptr, addr_size); 2727 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2728 } else { 2729 /* uh oh... don't have any address?? */ 2730 SCTPDBG(SCTP_DEBUG_ASCONF1, 2731 "compose_asconf: no lookup addr!\n"); 2732 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2733 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2734 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2735 bzero(lookup->addr, sizeof(struct in_addr)); 2736 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2737 } 2738 } 2739 /* chain it all together */ 2740 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2741 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2742 acp->ch.chunk_length = htons(*retlen); 2743 2744 return (m_asconf_chk); 2745 } 2746 2747 /* 2748 * section to handle address changes before an association is up eg. changes 2749 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2750 */ 2751 2752 /* 2753 * processes the (local) addresses in the INIT-ACK chunk 2754 */ 2755 static void 2756 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2757 unsigned int offset, unsigned int length) 2758 { 2759 struct sctp_paramhdr tmp_param, *ph; 2760 uint16_t plen, ptype; 2761 struct sctp_ifa *sctp_ifa; 2762 union sctp_sockstore store; 2763 2764 #ifdef INET6 2765 struct sctp_ipv6addr_param addr6_store; 2766 2767 #endif 2768 #ifdef INET 2769 struct sctp_ipv4addr_param addr4_store; 2770 2771 #endif 2772 2773 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2774 if (stcb == NULL) /* Un-needed check for SA */ 2775 return; 2776 2777 /* convert to upper bound */ 2778 length += offset; 2779 2780 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2781 return; 2782 } 2783 /* go through the addresses in the init-ack */ 2784 ph = (struct sctp_paramhdr *) 2785 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2786 (uint8_t *) & tmp_param); 2787 while (ph != NULL) { 2788 ptype = ntohs(ph->param_type); 2789 plen = ntohs(ph->param_length); 2790 switch (ptype) { 2791 #ifdef INET6 2792 case SCTP_IPV6_ADDRESS: 2793 { 2794 struct sctp_ipv6addr_param *a6p; 2795 2796 /* get the entire IPv6 address param */ 2797 a6p = (struct sctp_ipv6addr_param *) 2798 sctp_m_getptr(m, offset, 2799 sizeof(struct sctp_ipv6addr_param), 2800 (uint8_t *) & addr6_store); 2801 if (plen != sizeof(struct sctp_ipv6addr_param) || 2802 a6p == NULL) { 2803 return; 2804 } 2805 memset(&store, 0, sizeof(union sctp_sockstore)); 2806 store.sin6.sin6_family = AF_INET6; 2807 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2808 store.sin6.sin6_port = stcb->rport; 2809 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2810 break; 2811 } 2812 #endif 2813 #ifdef INET 2814 case SCTP_IPV4_ADDRESS: 2815 { 2816 struct sctp_ipv4addr_param *a4p; 2817 2818 /* get the entire IPv4 address param */ 2819 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2820 sizeof(struct sctp_ipv4addr_param), 2821 (uint8_t *) & addr4_store); 2822 if (plen != sizeof(struct sctp_ipv4addr_param) || 2823 a4p == NULL) { 2824 return; 2825 } 2826 memset(&store, 0, sizeof(union sctp_sockstore)); 2827 store.sin.sin_family = AF_INET; 2828 store.sin.sin_len = sizeof(struct sockaddr_in); 2829 store.sin.sin_port = stcb->rport; 2830 store.sin.sin_addr.s_addr = a4p->addr; 2831 break; 2832 } 2833 #endif 2834 default: 2835 goto next_addr; 2836 } 2837 2838 /* see if this address really (still) exists */ 2839 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2840 SCTP_ADDR_NOT_LOCKED); 2841 if (sctp_ifa == NULL) { 2842 /* address doesn't exist anymore */ 2843 int status; 2844 2845 /* are ASCONFs allowed ? */ 2846 if ((sctp_is_feature_on(stcb->sctp_ep, 2847 SCTP_PCB_FLAGS_DO_ASCONF)) && 2848 stcb->asoc.asconf_supported) { 2849 /* queue an ASCONF DEL_IP_ADDRESS */ 2850 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2851 /* 2852 * if queued ok, and in correct state, send 2853 * out the ASCONF. 2854 */ 2855 if (status == 0 && 2856 SCTP_GET_STATE(&stcb->asoc) == 2857 SCTP_STATE_OPEN) { 2858 #ifdef SCTP_TIMER_BASED_ASCONF 2859 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2860 stcb->sctp_ep, stcb, 2861 stcb->asoc.primary_destination); 2862 #else 2863 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2864 #endif 2865 } 2866 } 2867 } 2868 next_addr: 2869 /* 2870 * Sanity check: Make sure the length isn't 0, otherwise 2871 * we'll be stuck in this loop for a long time... 2872 */ 2873 if (SCTP_SIZE32(plen) == 0) { 2874 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2875 plen, ptype); 2876 return; 2877 } 2878 /* get next parameter */ 2879 offset += SCTP_SIZE32(plen); 2880 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2881 return; 2882 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2883 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2884 } /* while */ 2885 } 2886 2887 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2888 /* 2889 * checks to see if a specific address is in the initack address list returns 2890 * 1 if found, 0 if not 2891 */ 2892 static uint32_t 2893 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2894 { 2895 struct sctp_paramhdr tmp_param, *ph; 2896 uint16_t plen, ptype; 2897 2898 #ifdef INET 2899 struct sockaddr_in *sin; 2900 struct sctp_ipv4addr_param *a4p; 2901 struct sctp_ipv6addr_param addr4_store; 2902 2903 #endif 2904 #ifdef INET6 2905 struct sockaddr_in6 *sin6; 2906 struct sctp_ipv6addr_param *a6p; 2907 struct sctp_ipv6addr_param addr6_store; 2908 struct sockaddr_in6 sin6_tmp; 2909 2910 #endif 2911 2912 switch (sa->sa_family) { 2913 #ifdef INET 2914 case AF_INET: 2915 break; 2916 #endif 2917 #ifdef INET6 2918 case AF_INET6: 2919 break; 2920 #endif 2921 default: 2922 return (0); 2923 } 2924 2925 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2926 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2927 /* convert to upper bound */ 2928 length += offset; 2929 2930 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2931 SCTPDBG(SCTP_DEBUG_ASCONF1, 2932 "find_initack_addr: invalid offset?\n"); 2933 return (0); 2934 } 2935 /* go through the addresses in the init-ack */ 2936 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2937 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2938 while (ph != NULL) { 2939 ptype = ntohs(ph->param_type); 2940 plen = ntohs(ph->param_length); 2941 switch (ptype) { 2942 #ifdef INET6 2943 case SCTP_IPV6_ADDRESS: 2944 if (sa->sa_family == AF_INET6) { 2945 /* get the entire IPv6 address param */ 2946 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2947 break; 2948 } 2949 /* get the entire IPv6 address param */ 2950 a6p = (struct sctp_ipv6addr_param *) 2951 sctp_m_getptr(m, offset, 2952 sizeof(struct sctp_ipv6addr_param), 2953 (uint8_t *) & addr6_store); 2954 if (a6p == NULL) { 2955 return (0); 2956 } 2957 sin6 = (struct sockaddr_in6 *)sa; 2958 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2959 /* create a copy and clear scope */ 2960 memcpy(&sin6_tmp, sin6, 2961 sizeof(struct sockaddr_in6)); 2962 sin6 = &sin6_tmp; 2963 in6_clearscope(&sin6->sin6_addr); 2964 } 2965 if (memcmp(&sin6->sin6_addr, a6p->addr, 2966 sizeof(struct in6_addr)) == 0) { 2967 /* found it */ 2968 return (1); 2969 } 2970 } 2971 break; 2972 #endif /* INET6 */ 2973 #ifdef INET 2974 case SCTP_IPV4_ADDRESS: 2975 if (sa->sa_family == AF_INET) { 2976 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2977 break; 2978 } 2979 /* get the entire IPv4 address param */ 2980 a4p = (struct sctp_ipv4addr_param *) 2981 sctp_m_getptr(m, offset, 2982 sizeof(struct sctp_ipv4addr_param), 2983 (uint8_t *) & addr4_store); 2984 if (a4p == NULL) { 2985 return (0); 2986 } 2987 sin = (struct sockaddr_in *)sa; 2988 if (sin->sin_addr.s_addr == a4p->addr) { 2989 /* found it */ 2990 return (1); 2991 } 2992 } 2993 break; 2994 #endif 2995 default: 2996 break; 2997 } 2998 /* get next parameter */ 2999 offset += SCTP_SIZE32(plen); 3000 if (offset + sizeof(struct sctp_paramhdr) > length) { 3001 return (0); 3002 } 3003 ph = (struct sctp_paramhdr *) 3004 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3005 (uint8_t *) & tmp_param); 3006 } /* while */ 3007 /* not found! */ 3008 return (0); 3009 } 3010 3011 /* 3012 * makes sure that the current endpoint local addr list is consistent with 3013 * the new association (eg. subset bound, asconf allowed) adds addresses as 3014 * necessary 3015 */ 3016 static void 3017 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3018 int length, struct sockaddr *init_addr) 3019 { 3020 struct sctp_laddr *laddr; 3021 3022 /* go through the endpoint list */ 3023 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3024 /* be paranoid and validate the laddr */ 3025 if (laddr->ifa == NULL) { 3026 SCTPDBG(SCTP_DEBUG_ASCONF1, 3027 "check_addr_list_ep: laddr->ifa is NULL"); 3028 continue; 3029 } 3030 if (laddr->ifa == NULL) { 3031 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3032 continue; 3033 } 3034 /* do i have it implicitly? */ 3035 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3036 continue; 3037 } 3038 /* check to see if in the init-ack */ 3039 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3040 /* try to add it */ 3041 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3042 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3043 } 3044 } 3045 } 3046 3047 /* 3048 * makes sure that the current kernel address list is consistent with the new 3049 * association (with all addrs bound) adds addresses as necessary 3050 */ 3051 static void 3052 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3053 int length, struct sockaddr *init_addr, 3054 uint16_t local_scope, uint16_t site_scope, 3055 uint16_t ipv4_scope, uint16_t loopback_scope) 3056 { 3057 struct sctp_vrf *vrf = NULL; 3058 struct sctp_ifn *sctp_ifn; 3059 struct sctp_ifa *sctp_ifa; 3060 uint32_t vrf_id; 3061 3062 #ifdef INET 3063 struct sockaddr_in *sin; 3064 3065 #endif 3066 #ifdef INET6 3067 struct sockaddr_in6 *sin6; 3068 3069 #endif 3070 3071 if (stcb) { 3072 vrf_id = stcb->asoc.vrf_id; 3073 } else { 3074 return; 3075 } 3076 SCTP_IPI_ADDR_RLOCK(); 3077 vrf = sctp_find_vrf(vrf_id); 3078 if (vrf == NULL) { 3079 SCTP_IPI_ADDR_RUNLOCK(); 3080 return; 3081 } 3082 /* go through all our known interfaces */ 3083 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3084 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3085 /* skip loopback interface */ 3086 continue; 3087 } 3088 /* go through each interface address */ 3089 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3090 /* do i have it implicitly? */ 3091 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3092 continue; 3093 } 3094 switch (sctp_ifa->address.sa.sa_family) { 3095 #ifdef INET 3096 case AF_INET: 3097 sin = &sctp_ifa->address.sin; 3098 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3099 &sin->sin_addr) != 0) { 3100 continue; 3101 } 3102 if ((ipv4_scope == 0) && 3103 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3104 /* private address not in scope */ 3105 continue; 3106 } 3107 break; 3108 #endif 3109 #ifdef INET6 3110 case AF_INET6: 3111 sin6 = &sctp_ifa->address.sin6; 3112 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3113 &sin6->sin6_addr) != 0) { 3114 continue; 3115 } 3116 if ((local_scope == 0) && 3117 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3118 continue; 3119 } 3120 if ((site_scope == 0) && 3121 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3122 continue; 3123 } 3124 break; 3125 #endif 3126 default: 3127 break; 3128 } 3129 /* check to see if in the init-ack */ 3130 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3131 /* try to add it */ 3132 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3133 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3134 SCTP_ADDR_LOCKED); 3135 } 3136 } /* end foreach ifa */ 3137 } /* end foreach ifn */ 3138 SCTP_IPI_ADDR_RUNLOCK(); 3139 } 3140 3141 /* 3142 * validates an init-ack chunk (from a cookie-echo) with current addresses 3143 * adds addresses from the init-ack into our local address list, if needed 3144 * queues asconf adds/deletes addresses as needed and makes appropriate list 3145 * changes for source address selection m, offset: points to the start of the 3146 * address list in an init-ack chunk length: total length of the address 3147 * params only init_addr: address where my INIT-ACK was sent from 3148 */ 3149 void 3150 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3151 int length, struct sockaddr *init_addr, 3152 uint16_t local_scope, uint16_t site_scope, 3153 uint16_t ipv4_scope, uint16_t loopback_scope) 3154 { 3155 /* process the local addresses in the initack */ 3156 sctp_process_initack_addresses(stcb, m, offset, length); 3157 3158 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3159 /* bound all case */ 3160 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3161 local_scope, site_scope, ipv4_scope, loopback_scope); 3162 } else { 3163 /* subset bound case */ 3164 if (sctp_is_feature_on(stcb->sctp_ep, 3165 SCTP_PCB_FLAGS_DO_ASCONF)) { 3166 /* asconf's allowed */ 3167 sctp_check_address_list_ep(stcb, m, offset, length, 3168 init_addr); 3169 } 3170 /* else, no asconfs allowed, so what we sent is what we get */ 3171 } 3172 } 3173 3174 /* 3175 * sctp_bindx() support 3176 */ 3177 uint32_t 3178 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3179 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3180 { 3181 struct sctp_ifa *ifa; 3182 struct sctp_laddr *laddr, *nladdr; 3183 3184 if (sa->sa_len == 0) { 3185 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3186 return (EINVAL); 3187 } 3188 if (sctp_ifap) { 3189 ifa = sctp_ifap; 3190 } else if (type == SCTP_ADD_IP_ADDRESS) { 3191 /* For an add the address MUST be on the system */ 3192 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3193 } else if (type == SCTP_DEL_IP_ADDRESS) { 3194 /* For a delete we need to find it in the inp */ 3195 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3196 } else { 3197 ifa = NULL; 3198 } 3199 if (ifa != NULL) { 3200 if (type == SCTP_ADD_IP_ADDRESS) { 3201 sctp_add_local_addr_ep(inp, ifa, type); 3202 } else if (type == SCTP_DEL_IP_ADDRESS) { 3203 if (inp->laddr_count < 2) { 3204 /* can't delete the last local address */ 3205 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3206 return (EINVAL); 3207 } 3208 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3209 sctp_nxt_addr) { 3210 if (ifa == laddr->ifa) { 3211 /* Mark in the delete */ 3212 laddr->action = type; 3213 } 3214 } 3215 } 3216 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3217 /* 3218 * There is no need to start the iterator if the inp 3219 * has no associations. 3220 */ 3221 if (type == SCTP_DEL_IP_ADDRESS) { 3222 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3223 if (laddr->ifa == ifa) { 3224 sctp_del_local_addr_ep(inp, ifa); 3225 } 3226 } 3227 } 3228 } else { 3229 struct sctp_asconf_iterator *asc; 3230 struct sctp_laddr *wi; 3231 3232 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3233 sizeof(struct sctp_asconf_iterator), 3234 SCTP_M_ASC_IT); 3235 if (asc == NULL) { 3236 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3237 return (ENOMEM); 3238 } 3239 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3240 if (wi == NULL) { 3241 SCTP_FREE(asc, SCTP_M_ASC_IT); 3242 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3243 return (ENOMEM); 3244 } 3245 LIST_INIT(&asc->list_of_work); 3246 asc->cnt = 1; 3247 SCTP_INCR_LADDR_COUNT(); 3248 wi->ifa = ifa; 3249 wi->action = type; 3250 atomic_add_int(&ifa->refcount, 1); 3251 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3252 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3253 sctp_asconf_iterator_stcb, 3254 sctp_asconf_iterator_ep_end, 3255 SCTP_PCB_ANY_FLAGS, 3256 SCTP_PCB_ANY_FEATURES, 3257 SCTP_ASOC_ANY_STATE, 3258 (void *)asc, 0, 3259 sctp_asconf_iterator_end, inp, 0); 3260 } 3261 return (0); 3262 } else { 3263 /* invalid address! */ 3264 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3265 return (EADDRNOTAVAIL); 3266 } 3267 } 3268 3269 void 3270 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3271 struct sctp_nets *net) 3272 { 3273 struct sctp_asconf_addr *aa; 3274 struct sctp_ifa *sctp_ifap; 3275 struct sctp_asconf_tag_param *vtag; 3276 3277 #ifdef INET 3278 struct sockaddr_in *to; 3279 3280 #endif 3281 #ifdef INET6 3282 struct sockaddr_in6 *to6; 3283 3284 #endif 3285 if (net == NULL) { 3286 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3287 return; 3288 } 3289 if (stcb == NULL) { 3290 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3291 return; 3292 } 3293 /* 3294 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3295 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3296 */ 3297 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3298 SCTP_M_ASC_ADDR); 3299 if (aa == NULL) { 3300 /* didn't get memory */ 3301 SCTPDBG(SCTP_DEBUG_ASCONF1, 3302 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3303 return; 3304 } 3305 aa->special_del = 0; 3306 /* fill in asconf address parameter fields */ 3307 /* top level elements are "networked" during send */ 3308 aa->ifa = NULL; 3309 aa->sent = 0; /* clear sent flag */ 3310 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3311 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3312 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3313 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3314 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3315 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3316 3317 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3318 SCTP_M_ASC_ADDR); 3319 if (aa == NULL) { 3320 /* didn't get memory */ 3321 SCTPDBG(SCTP_DEBUG_ASCONF1, 3322 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3323 return; 3324 } 3325 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3326 /* fill in asconf address parameter fields */ 3327 /* ADD(0.0.0.0) */ 3328 switch (net->ro._l_addr.sa.sa_family) { 3329 #ifdef INET 3330 case AF_INET: 3331 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3332 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3333 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3334 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3335 /* No need to add an address, we are using 0.0.0.0 */ 3336 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3337 break; 3338 #endif 3339 #ifdef INET6 3340 case AF_INET6: 3341 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3342 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3343 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3344 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3345 /* No need to add an address, we are using 0.0.0.0 */ 3346 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3347 break; 3348 #endif 3349 default: 3350 SCTPDBG(SCTP_DEBUG_ASCONF1, 3351 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3352 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3353 return; 3354 } 3355 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3356 SCTP_M_ASC_ADDR); 3357 if (aa == NULL) { 3358 /* didn't get memory */ 3359 SCTPDBG(SCTP_DEBUG_ASCONF1, 3360 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3361 return; 3362 } 3363 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3364 /* fill in asconf address parameter fields */ 3365 /* ADD(0.0.0.0) */ 3366 switch (net->ro._l_addr.sa.sa_family) { 3367 #ifdef INET 3368 case AF_INET: 3369 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3370 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3371 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3372 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3373 /* No need to add an address, we are using 0.0.0.0 */ 3374 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3375 break; 3376 #endif 3377 #ifdef INET6 3378 case AF_INET6: 3379 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3380 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3381 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3382 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3383 /* No need to add an address, we are using 0.0.0.0 */ 3384 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3385 break; 3386 #endif 3387 default: 3388 SCTPDBG(SCTP_DEBUG_ASCONF1, 3389 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3390 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3391 return; 3392 } 3393 /* Now we must hunt the addresses and add all global addresses */ 3394 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3395 struct sctp_vrf *vrf = NULL; 3396 struct sctp_ifn *sctp_ifnp; 3397 uint32_t vrf_id; 3398 3399 vrf_id = stcb->sctp_ep->def_vrf_id; 3400 vrf = sctp_find_vrf(vrf_id); 3401 if (vrf == NULL) { 3402 goto skip_rest; 3403 } 3404 SCTP_IPI_ADDR_RLOCK(); 3405 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3406 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3407 switch (sctp_ifap->address.sa.sa_family) { 3408 #ifdef INET 3409 case AF_INET: 3410 to = &sctp_ifap->address.sin; 3411 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3412 &to->sin_addr) != 0) { 3413 continue; 3414 } 3415 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3416 continue; 3417 } 3418 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3419 continue; 3420 } 3421 break; 3422 #endif 3423 #ifdef INET6 3424 case AF_INET6: 3425 to6 = &sctp_ifap->address.sin6; 3426 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3427 &to6->sin6_addr) != 0) { 3428 continue; 3429 } 3430 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3431 continue; 3432 } 3433 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3434 continue; 3435 } 3436 break; 3437 #endif 3438 default: 3439 continue; 3440 } 3441 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3442 } 3443 } 3444 SCTP_IPI_ADDR_RUNLOCK(); 3445 } else { 3446 struct sctp_laddr *laddr; 3447 3448 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3449 if (laddr->ifa == NULL) { 3450 continue; 3451 } 3452 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3453 /* 3454 * Address being deleted by the system, dont 3455 * list. 3456 */ 3457 continue; 3458 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3459 /* 3460 * Address being deleted on this ep don't 3461 * list. 3462 */ 3463 continue; 3464 } 3465 sctp_ifap = laddr->ifa; 3466 switch (sctp_ifap->address.sa.sa_family) { 3467 #ifdef INET 3468 case AF_INET: 3469 to = &sctp_ifap->address.sin; 3470 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3471 continue; 3472 } 3473 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3474 continue; 3475 } 3476 break; 3477 #endif 3478 #ifdef INET6 3479 case AF_INET6: 3480 to6 = &sctp_ifap->address.sin6; 3481 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3482 continue; 3483 } 3484 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3485 continue; 3486 } 3487 break; 3488 #endif 3489 default: 3490 continue; 3491 } 3492 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3493 } 3494 } 3495 skip_rest: 3496 /* Now we must send the asconf into the queue */ 3497 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3498 } 3499