1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <netinet/sctp_var.h> 40 #include <netinet/sctp_sysctl.h> 41 #include <netinet/sctp_pcb.h> 42 #include <netinet/sctp_header.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp_output.h> 45 #include <netinet/sctp_asconf.h> 46 #include <netinet/sctp_timer.h> 47 48 /* 49 * debug flags: 50 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 51 * SCTP_DEBUG_ASCONF2: detailed info 52 */ 53 54 55 /* 56 * RFC 5061 57 * 58 * An ASCONF parameter queue exists per asoc which holds the pending address 59 * operations. Lists are updated upon receipt of ASCONF-ACK. 60 * 61 * A restricted_addrs list exists per assoc to hold local addresses that are 62 * not (yet) usable by the assoc as a source address. These addresses are 63 * either pending an ASCONF operation (and exist on the ASCONF parameter 64 * queue), or they are permanently restricted (the peer has returned an 65 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 66 * 67 * Deleted addresses are always immediately removed from the lists as they will 68 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 69 * only if allowed. 70 */ 71 72 /* 73 * ASCONF parameter processing. 74 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 75 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 76 * FIX: allocating this many mbufs on the fly is pretty inefficient... 77 */ 78 static struct mbuf * 79 sctp_asconf_success_response(uint32_t id) 80 { 81 struct mbuf *m_reply = NULL; 82 struct sctp_asconf_paramhdr *aph; 83 84 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 85 0, M_NOWAIT, 1, MT_DATA); 86 if (m_reply == NULL) { 87 SCTPDBG(SCTP_DEBUG_ASCONF1, 88 "asconf_success_response: couldn't get mbuf!\n"); 89 return (NULL); 90 } 91 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 92 aph->correlation_id = id; 93 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 94 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 95 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 96 aph->ph.param_length = htons(aph->ph.param_length); 97 98 return (m_reply); 99 } 100 101 static struct mbuf * 102 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv, 103 uint16_t tlv_length) 104 { 105 struct mbuf *m_reply = NULL; 106 struct sctp_asconf_paramhdr *aph; 107 struct sctp_error_cause *error; 108 uint32_t buf_len; 109 uint16_t i, param_length, cause_length, padding_length; 110 uint8_t *tlv; 111 112 if (error_tlv == NULL) { 113 tlv_length = 0; 114 } 115 cause_length = sizeof(struct sctp_error_cause) + tlv_length; 116 param_length = sizeof(struct sctp_asconf_paramhdr) + cause_length; 117 padding_length = tlv_length % 4; 118 if (padding_length != 0) { 119 padding_length = 4 - padding_length; 120 } 121 buf_len = param_length + padding_length; 122 if (buf_len > MLEN) { 123 SCTPDBG(SCTP_DEBUG_ASCONF1, 124 "asconf_error_response: tlv_length (%xh) too big\n", 125 tlv_length); 126 return (NULL); 127 } 128 m_reply = sctp_get_mbuf_for_msg(buf_len, 0, M_NOWAIT, 1, MT_DATA); 129 if (m_reply == NULL) { 130 SCTPDBG(SCTP_DEBUG_ASCONF1, 131 "asconf_error_response: couldn't get mbuf!\n"); 132 return (NULL); 133 } 134 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 135 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 136 aph->ph.param_length = htons(param_length); 137 aph->correlation_id = id; 138 error = (struct sctp_error_cause *)(aph + 1); 139 error->code = htons(cause); 140 error->length = htons(cause_length); 141 if (error_tlv != NULL) { 142 tlv = (uint8_t *)(error + 1); 143 memcpy(tlv, error_tlv, tlv_length); 144 for (i = 0; i < padding_length; i++) { 145 tlv[tlv_length + i] = 0; 146 } 147 } 148 SCTP_BUF_LEN(m_reply) = buf_len; 149 return (m_reply); 150 } 151 152 static struct mbuf * 153 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, 154 struct sctp_tcb *stcb, int send_hb, int response_required) 155 { 156 struct sctp_nets *net; 157 struct mbuf *m_reply = NULL; 158 union sctp_sockstore store; 159 struct sctp_paramhdr *ph; 160 uint16_t param_type, aparam_length; 161 #if defined(INET) || defined(INET6) 162 uint16_t param_length; 163 #endif 164 struct sockaddr *sa; 165 int zero_address = 0; 166 int bad_address = 0; 167 #ifdef INET 168 struct sockaddr_in *sin; 169 struct sctp_ipv4addr_param *v4addr; 170 #endif 171 #ifdef INET6 172 struct sockaddr_in6 *sin6; 173 struct sctp_ipv6addr_param *v6addr; 174 #endif 175 176 aparam_length = ntohs(aph->ph.param_length); 177 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 178 return (NULL); 179 } 180 ph = (struct sctp_paramhdr *)(aph + 1); 181 param_type = ntohs(ph->param_type); 182 #if defined(INET) || defined(INET6) 183 param_length = ntohs(ph->param_length); 184 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 185 return (NULL); 186 } 187 #endif 188 sa = &store.sa; 189 switch (param_type) { 190 #ifdef INET 191 case SCTP_IPV4_ADDRESS: 192 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 193 /* invalid param size */ 194 return (NULL); 195 } 196 v4addr = (struct sctp_ipv4addr_param *)ph; 197 sin = &store.sin; 198 memset(sin, 0, sizeof(*sin)); 199 sin->sin_family = AF_INET; 200 sin->sin_len = sizeof(struct sockaddr_in); 201 sin->sin_port = stcb->rport; 202 sin->sin_addr.s_addr = v4addr->addr; 203 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 204 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 205 bad_address = 1; 206 } 207 if (sin->sin_addr.s_addr == INADDR_ANY) 208 zero_address = 1; 209 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 210 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 211 break; 212 #endif 213 #ifdef INET6 214 case SCTP_IPV6_ADDRESS: 215 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 216 /* invalid param size */ 217 return (NULL); 218 } 219 v6addr = (struct sctp_ipv6addr_param *)ph; 220 sin6 = &store.sin6; 221 memset(sin6, 0, sizeof(*sin6)); 222 sin6->sin6_family = AF_INET6; 223 sin6->sin6_len = sizeof(struct sockaddr_in6); 224 sin6->sin6_port = stcb->rport; 225 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 226 sizeof(struct in6_addr)); 227 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 228 bad_address = 1; 229 } 230 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 231 zero_address = 1; 232 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 233 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 234 break; 235 #endif 236 default: 237 m_reply = sctp_asconf_error_response(aph->correlation_id, 238 SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph, 239 aparam_length); 240 return (m_reply); 241 } /* end switch */ 242 243 /* if 0.0.0.0/::0, add the source address instead */ 244 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 245 sa = src; 246 SCTPDBG(SCTP_DEBUG_ASCONF1, 247 "process_asconf_add_ip: using source addr "); 248 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 249 } 250 net = NULL; 251 /* add the address */ 252 if (bad_address) { 253 m_reply = sctp_asconf_error_response(aph->correlation_id, 254 SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph, 255 aparam_length); 256 } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port, 257 SCTP_DONOT_SETSCOPE, 258 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 259 SCTPDBG(SCTP_DEBUG_ASCONF1, 260 "process_asconf_add_ip: error adding address\n"); 261 m_reply = sctp_asconf_error_response(aph->correlation_id, 262 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *)aph, 263 aparam_length); 264 } else { 265 if (response_required) { 266 m_reply = 267 sctp_asconf_success_response(aph->correlation_id); 268 } 269 if (net != NULL) { 270 /* notify upper layer */ 271 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 272 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 273 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 274 stcb, net); 275 if (send_hb) { 276 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 277 } 278 } 279 } 280 return (m_reply); 281 } 282 283 static int 284 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 285 { 286 struct sctp_nets *src_net, *net, *nnet; 287 288 /* make sure the source address exists as a destination net */ 289 src_net = sctp_findnet(stcb, src); 290 if (src_net == NULL) { 291 /* not found */ 292 return (-1); 293 } 294 295 /* delete all destination addresses except the source */ 296 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 297 if (net != src_net) { 298 /* delete this address */ 299 SCTPDBG(SCTP_DEBUG_ASCONF1, 300 "asconf_del_remote_addrs_except: deleting "); 301 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 302 (struct sockaddr *)&net->ro._l_addr); 303 /* notify upper layer */ 304 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 305 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 306 sctp_remove_net(stcb, net); 307 } 308 } 309 return (0); 310 } 311 312 static struct mbuf * 313 sctp_process_asconf_delete_ip(struct sockaddr *src, 314 struct sctp_asconf_paramhdr *aph, 315 struct sctp_tcb *stcb, int response_required) 316 { 317 struct mbuf *m_reply = NULL; 318 union sctp_sockstore store; 319 struct sctp_paramhdr *ph; 320 uint16_t param_type, aparam_length; 321 #if defined(INET) || defined(INET6) 322 uint16_t param_length; 323 #endif 324 struct sockaddr *sa; 325 int zero_address = 0; 326 int result; 327 #ifdef INET 328 struct sockaddr_in *sin; 329 struct sctp_ipv4addr_param *v4addr; 330 #endif 331 #ifdef INET6 332 struct sockaddr_in6 *sin6; 333 struct sctp_ipv6addr_param *v6addr; 334 #endif 335 336 aparam_length = ntohs(aph->ph.param_length); 337 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 338 return (NULL); 339 } 340 ph = (struct sctp_paramhdr *)(aph + 1); 341 param_type = ntohs(ph->param_type); 342 #if defined(INET) || defined(INET6) 343 param_length = ntohs(ph->param_length); 344 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 345 return (NULL); 346 } 347 #endif 348 sa = &store.sa; 349 switch (param_type) { 350 #ifdef INET 351 case SCTP_IPV4_ADDRESS: 352 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 353 /* invalid param size */ 354 return (NULL); 355 } 356 v4addr = (struct sctp_ipv4addr_param *)ph; 357 sin = &store.sin; 358 memset(sin, 0, sizeof(*sin)); 359 sin->sin_family = AF_INET; 360 sin->sin_len = sizeof(struct sockaddr_in); 361 sin->sin_port = stcb->rport; 362 sin->sin_addr.s_addr = v4addr->addr; 363 if (sin->sin_addr.s_addr == INADDR_ANY) 364 zero_address = 1; 365 SCTPDBG(SCTP_DEBUG_ASCONF1, 366 "process_asconf_delete_ip: deleting "); 367 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 368 break; 369 #endif 370 #ifdef INET6 371 case SCTP_IPV6_ADDRESS: 372 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 373 /* invalid param size */ 374 return (NULL); 375 } 376 v6addr = (struct sctp_ipv6addr_param *)ph; 377 sin6 = &store.sin6; 378 memset(sin6, 0, sizeof(*sin6)); 379 sin6->sin6_family = AF_INET6; 380 sin6->sin6_len = sizeof(struct sockaddr_in6); 381 sin6->sin6_port = stcb->rport; 382 memcpy(&sin6->sin6_addr, v6addr->addr, 383 sizeof(struct in6_addr)); 384 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 385 zero_address = 1; 386 SCTPDBG(SCTP_DEBUG_ASCONF1, 387 "process_asconf_delete_ip: deleting "); 388 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 389 break; 390 #endif 391 default: 392 m_reply = sctp_asconf_error_response(aph->correlation_id, 393 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 394 aparam_length); 395 return (m_reply); 396 } 397 398 /* make sure the source address is not being deleted */ 399 if (sctp_cmpaddr(sa, src)) { 400 /* trying to delete the source address! */ 401 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 402 m_reply = sctp_asconf_error_response(aph->correlation_id, 403 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph, 404 aparam_length); 405 return (m_reply); 406 } 407 408 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 409 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 410 result = sctp_asconf_del_remote_addrs_except(stcb, src); 411 412 if (result) { 413 /* src address did not exist? */ 414 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 415 /* what error to reply with?? */ 416 m_reply = 417 sctp_asconf_error_response(aph->correlation_id, 418 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph, 419 aparam_length); 420 } else if (response_required) { 421 m_reply = 422 sctp_asconf_success_response(aph->correlation_id); 423 } 424 return (m_reply); 425 } 426 427 /* delete the address */ 428 result = sctp_del_remote_addr(stcb, sa); 429 /* 430 * note if result == -2, the address doesn't exist in the asoc but 431 * since it's being deleted anyways, we just ack the delete -- but 432 * this probably means something has already gone awry 433 */ 434 if (result == -1) { 435 /* only one address in the asoc */ 436 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 437 m_reply = sctp_asconf_error_response(aph->correlation_id, 438 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph, 439 aparam_length); 440 } else { 441 if (response_required) { 442 m_reply = sctp_asconf_success_response(aph->correlation_id); 443 } 444 /* notify upper layer */ 445 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 446 } 447 return (m_reply); 448 } 449 450 static struct mbuf * 451 sctp_process_asconf_set_primary(struct sockaddr *src, 452 struct sctp_asconf_paramhdr *aph, 453 struct sctp_tcb *stcb, int response_required) 454 { 455 struct mbuf *m_reply = NULL; 456 union sctp_sockstore store; 457 struct sctp_paramhdr *ph; 458 uint16_t param_type, aparam_length; 459 #if defined(INET) || defined(INET6) 460 uint16_t param_length; 461 #endif 462 struct sockaddr *sa; 463 int zero_address = 0; 464 #ifdef INET 465 struct sockaddr_in *sin; 466 struct sctp_ipv4addr_param *v4addr; 467 #endif 468 #ifdef INET6 469 struct sockaddr_in6 *sin6; 470 struct sctp_ipv6addr_param *v6addr; 471 #endif 472 473 aparam_length = ntohs(aph->ph.param_length); 474 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 475 return (NULL); 476 } 477 ph = (struct sctp_paramhdr *)(aph + 1); 478 param_type = ntohs(ph->param_type); 479 #if defined(INET) || defined(INET6) 480 param_length = ntohs(ph->param_length); 481 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 482 return (NULL); 483 } 484 #endif 485 sa = &store.sa; 486 switch (param_type) { 487 #ifdef INET 488 case SCTP_IPV4_ADDRESS: 489 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 490 /* invalid param size */ 491 return (NULL); 492 } 493 v4addr = (struct sctp_ipv4addr_param *)ph; 494 sin = &store.sin; 495 memset(sin, 0, sizeof(*sin)); 496 sin->sin_family = AF_INET; 497 sin->sin_len = sizeof(struct sockaddr_in); 498 sin->sin_addr.s_addr = v4addr->addr; 499 if (sin->sin_addr.s_addr == INADDR_ANY) 500 zero_address = 1; 501 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 502 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 503 break; 504 #endif 505 #ifdef INET6 506 case SCTP_IPV6_ADDRESS: 507 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 508 /* invalid param size */ 509 return (NULL); 510 } 511 v6addr = (struct sctp_ipv6addr_param *)ph; 512 sin6 = &store.sin6; 513 memset(sin6, 0, sizeof(*sin6)); 514 sin6->sin6_family = AF_INET6; 515 sin6->sin6_len = sizeof(struct sockaddr_in6); 516 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 517 sizeof(struct in6_addr)); 518 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 519 zero_address = 1; 520 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 521 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 522 break; 523 #endif 524 default: 525 m_reply = sctp_asconf_error_response(aph->correlation_id, 526 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 527 aparam_length); 528 return (m_reply); 529 } 530 531 /* if 0.0.0.0/::0, use the source address instead */ 532 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 533 sa = src; 534 SCTPDBG(SCTP_DEBUG_ASCONF1, 535 "process_asconf_set_primary: using source addr "); 536 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 537 } 538 /* set the primary address */ 539 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 540 SCTPDBG(SCTP_DEBUG_ASCONF1, 541 "process_asconf_set_primary: primary address set\n"); 542 /* notify upper layer */ 543 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 544 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 545 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 546 (stcb->asoc.alternate)) { 547 sctp_free_remote_addr(stcb->asoc.alternate); 548 stcb->asoc.alternate = NULL; 549 } 550 if (response_required) { 551 m_reply = sctp_asconf_success_response(aph->correlation_id); 552 } 553 /* 554 * Mobility adaptation. Ideally, when the reception of SET 555 * PRIMARY with DELETE IP ADDRESS of the previous primary 556 * destination, unacknowledged DATA are retransmitted 557 * immediately to the new primary destination for seamless 558 * handover. If the destination is UNCONFIRMED and marked to 559 * REQ_PRIM, The retransmission occur when reception of the 560 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 561 * sctp_input.c) Also, when change of the primary 562 * destination, it is better that all subsequent new DATA 563 * containing already queued DATA are transmitted to the new 564 * primary destination. (by micchie) 565 */ 566 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 567 SCTP_MOBILITY_BASE) || 568 sctp_is_mobility_feature_on(stcb->sctp_ep, 569 SCTP_MOBILITY_FASTHANDOFF)) && 570 sctp_is_mobility_feature_on(stcb->sctp_ep, 571 SCTP_MOBILITY_PRIM_DELETED) && 572 (stcb->asoc.primary_destination->dest_state & 573 SCTP_ADDR_UNCONFIRMED) == 0) { 574 575 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, 576 stcb->sctp_ep, stcb, NULL, 577 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1); 578 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 579 SCTP_MOBILITY_FASTHANDOFF)) { 580 sctp_assoc_immediate_retrans(stcb, 581 stcb->asoc.primary_destination); 582 } 583 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 584 SCTP_MOBILITY_BASE)) { 585 sctp_move_chunks_from_net(stcb, 586 stcb->asoc.deleted_primary); 587 } 588 sctp_delete_prim_timer(stcb->sctp_ep, stcb); 589 } 590 } else { 591 /* couldn't set the requested primary address! */ 592 SCTPDBG(SCTP_DEBUG_ASCONF1, 593 "process_asconf_set_primary: set primary failed!\n"); 594 /* must have been an invalid address, so report */ 595 m_reply = sctp_asconf_error_response(aph->correlation_id, 596 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 597 aparam_length); 598 } 599 600 return (m_reply); 601 } 602 603 /* 604 * handles an ASCONF chunk. 605 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 606 */ 607 void 608 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 609 struct sockaddr *src, 610 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 611 int first) 612 { 613 struct sctp_association *asoc; 614 uint32_t serial_num; 615 struct mbuf *n, *m_ack, *m_result, *m_tail; 616 struct sctp_asconf_ack_chunk *ack_cp; 617 struct sctp_asconf_paramhdr *aph; 618 struct sctp_ipv6addr_param *p_addr; 619 unsigned int asconf_limit, cnt; 620 int error = 0; /* did an error occur? */ 621 622 /* asconf param buffer */ 623 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 624 struct sctp_asconf_ack *ack, *ack_next; 625 626 /* verify minimum length */ 627 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 628 SCTPDBG(SCTP_DEBUG_ASCONF1, 629 "handle_asconf: chunk too small = %xh\n", 630 ntohs(cp->ch.chunk_length)); 631 return; 632 } 633 asoc = &stcb->asoc; 634 serial_num = ntohl(cp->serial_number); 635 636 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 637 /* got a duplicate ASCONF */ 638 SCTPDBG(SCTP_DEBUG_ASCONF1, 639 "handle_asconf: got duplicate serial number = %xh\n", 640 serial_num); 641 return; 642 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 643 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 644 serial_num, asoc->asconf_seq_in + 1); 645 return; 646 } 647 648 /* it's the expected "next" sequence number, so process it */ 649 asoc->asconf_seq_in = serial_num; /* update sequence */ 650 /* get length of all the param's in the ASCONF */ 651 asconf_limit = offset + ntohs(cp->ch.chunk_length); 652 SCTPDBG(SCTP_DEBUG_ASCONF1, 653 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 654 asconf_limit, serial_num); 655 656 if (first) { 657 /* delete old cache */ 658 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 659 660 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 661 if (ack->serial_number == serial_num) 662 break; 663 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 664 ack->serial_number, serial_num); 665 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 666 if (ack->data != NULL) { 667 sctp_m_freem(ack->data); 668 } 669 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 670 } 671 } 672 673 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 674 M_NOWAIT, 1, MT_DATA); 675 if (m_ack == NULL) { 676 SCTPDBG(SCTP_DEBUG_ASCONF1, 677 "handle_asconf: couldn't get mbuf!\n"); 678 return; 679 } 680 m_tail = m_ack; /* current reply chain's tail */ 681 682 /* fill in ASCONF-ACK header */ 683 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 684 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 685 ack_cp->ch.chunk_flags = 0; 686 ack_cp->serial_number = htonl(serial_num); 687 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 688 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 689 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 690 691 /* skip the lookup address parameter */ 692 offset += sizeof(struct sctp_asconf_chunk); 693 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); 694 if (p_addr == NULL) { 695 SCTPDBG(SCTP_DEBUG_ASCONF1, 696 "handle_asconf: couldn't get lookup addr!\n"); 697 /* respond with a missing/invalid mandatory parameter error */ 698 sctp_m_freem(m_ack); 699 return; 700 } 701 /* skip lookup addr */ 702 offset += SCTP_SIZE32(ntohs(p_addr->ph.param_length)); 703 /* get pointer to first asconf param in ASCONF */ 704 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); 705 if (aph == NULL) { 706 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 707 goto send_reply; 708 } 709 /* process through all parameters */ 710 cnt = 0; 711 while (aph != NULL) { 712 unsigned int param_length, param_type; 713 714 param_type = ntohs(aph->ph.param_type); 715 param_length = ntohs(aph->ph.param_length); 716 if (offset + param_length > asconf_limit) { 717 /* parameter goes beyond end of chunk! */ 718 sctp_m_freem(m_ack); 719 return; 720 } 721 m_result = NULL; 722 723 if (param_length > sizeof(aparam_buf)) { 724 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 725 sctp_m_freem(m_ack); 726 return; 727 } 728 if (param_length <= sizeof(struct sctp_paramhdr)) { 729 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 730 sctp_m_freem(m_ack); 731 return; 732 } 733 /* get the entire parameter */ 734 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 735 if (aph == NULL) { 736 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 737 sctp_m_freem(m_ack); 738 return; 739 } 740 switch (param_type) { 741 case SCTP_ADD_IP_ADDRESS: 742 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 743 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 744 cnt++; 745 break; 746 case SCTP_DEL_IP_ADDRESS: 747 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 748 error); 749 break; 750 case SCTP_ERROR_CAUSE_IND: 751 /* not valid in an ASCONF chunk */ 752 break; 753 case SCTP_SET_PRIM_ADDR: 754 m_result = sctp_process_asconf_set_primary(src, aph, 755 stcb, error); 756 break; 757 case SCTP_NAT_VTAGS: 758 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 759 break; 760 case SCTP_SUCCESS_REPORT: 761 /* not valid in an ASCONF chunk */ 762 break; 763 case SCTP_ULP_ADAPTATION: 764 /* FIX */ 765 break; 766 default: 767 if ((param_type & 0x8000) == 0) { 768 /* Been told to STOP at this param */ 769 asconf_limit = offset; 770 /* 771 * FIX FIX - We need to call 772 * sctp_arethere_unrecognized_parameters() 773 * to get a operr and send it for any 774 * param's with the 0x4000 bit set OR do it 775 * here ourselves... note we still must STOP 776 * if the 0x8000 bit is clear. 777 */ 778 } 779 /* unknown/invalid param type */ 780 break; 781 } /* switch */ 782 783 /* add any (error) result to the reply mbuf chain */ 784 if (m_result != NULL) { 785 SCTP_BUF_NEXT(m_tail) = m_result; 786 m_tail = m_result; 787 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 788 /* set flag to force success reports */ 789 error = 1; 790 } 791 offset += SCTP_SIZE32(param_length); 792 /* update remaining ASCONF message length to process */ 793 if (offset >= asconf_limit) { 794 /* no more data in the mbuf chain */ 795 break; 796 } 797 /* get pointer to next asconf param */ 798 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 799 sizeof(struct sctp_asconf_paramhdr), 800 (uint8_t *)&aparam_buf); 801 if (aph == NULL) { 802 /* can't get an asconf paramhdr */ 803 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 804 /* FIX ME - add error here... */ 805 } 806 } 807 808 send_reply: 809 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 810 /* save the ASCONF-ACK reply */ 811 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 812 struct sctp_asconf_ack); 813 if (ack == NULL) { 814 sctp_m_freem(m_ack); 815 return; 816 } 817 ack->serial_number = serial_num; 818 ack->last_sent_to = NULL; 819 ack->data = m_ack; 820 ack->len = 0; 821 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 822 ack->len += SCTP_BUF_LEN(n); 823 } 824 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 825 826 /* see if last_control_chunk_from is set properly (use IP src addr) */ 827 if (stcb->asoc.last_control_chunk_from == NULL) { 828 /* 829 * this could happen if the source address was just newly 830 * added 831 */ 832 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 833 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 834 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 835 /* look up the from address */ 836 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 837 #ifdef SCTP_DEBUG 838 if (stcb->asoc.last_control_chunk_from == NULL) { 839 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 840 } 841 #endif 842 } 843 } 844 845 /* 846 * does the address match? returns 0 if not, 1 if so 847 */ 848 static uint32_t 849 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 850 { 851 switch (sa->sa_family) { 852 #ifdef INET6 853 case AF_INET6: 854 { 855 /* XXX scopeid */ 856 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 857 858 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 859 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 860 sizeof(struct in6_addr)) == 0)) { 861 return (1); 862 } 863 break; 864 } 865 #endif 866 #ifdef INET 867 case AF_INET: 868 { 869 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 870 871 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 872 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 873 sizeof(struct in_addr)) == 0)) { 874 return (1); 875 } 876 break; 877 } 878 #endif 879 default: 880 break; 881 } 882 return (0); 883 } 884 885 /* 886 * does the address match? returns 0 if not, 1 if so 887 */ 888 static uint32_t 889 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 890 { 891 #if defined(INET) || defined(INET6) 892 uint16_t param_type, param_length; 893 894 param_type = ntohs(ph->param_type); 895 param_length = ntohs(ph->param_length); 896 #endif 897 switch (sa->sa_family) { 898 #ifdef INET6 899 case AF_INET6: 900 { 901 /* XXX scopeid */ 902 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 903 struct sctp_ipv6addr_param *v6addr; 904 905 v6addr = (struct sctp_ipv6addr_param *)ph; 906 if ((param_type == SCTP_IPV6_ADDRESS) && 907 (param_length == sizeof(struct sctp_ipv6addr_param)) && 908 (memcmp(&v6addr->addr, &sin6->sin6_addr, 909 sizeof(struct in6_addr)) == 0)) { 910 return (1); 911 } 912 break; 913 } 914 #endif 915 #ifdef INET 916 case AF_INET: 917 { 918 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 919 struct sctp_ipv4addr_param *v4addr; 920 921 v4addr = (struct sctp_ipv4addr_param *)ph; 922 if ((param_type == SCTP_IPV4_ADDRESS) && 923 (param_length == sizeof(struct sctp_ipv4addr_param)) && 924 (memcmp(&v4addr->addr, &sin->sin_addr, 925 sizeof(struct in_addr)) == 0)) { 926 return (1); 927 } 928 break; 929 } 930 #endif 931 default: 932 break; 933 } 934 return (0); 935 } 936 937 /* 938 * Cleanup for non-responded/OP ERR'd ASCONF 939 */ 940 void 941 sctp_asconf_cleanup(struct sctp_tcb *stcb) 942 { 943 /* 944 * clear out any existing asconfs going out 945 */ 946 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, 947 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 948 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 949 /* remove the old ASCONF on our outbound queue */ 950 sctp_toss_old_asconf(stcb); 951 } 952 953 /* 954 * cleanup any cached source addresses that may be topologically 955 * incorrect after a new address has been added to this interface. 956 */ 957 static void 958 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 959 { 960 struct sctp_nets *net; 961 962 /* 963 * Ideally, we want to only clear cached routes and source addresses 964 * that are topologically incorrect. But since there is no easy way 965 * to know whether the newly added address on the ifn would cause a 966 * routing change (i.e. a new egress interface would be chosen) 967 * without doing a new routing lookup and source address selection, 968 * we will (for now) just flush any cached route using a different 969 * ifn (and cached source addrs) and let output re-choose them 970 * during the next send on that net. 971 */ 972 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 973 /* 974 * clear any cached route (and cached source address) if the 975 * route's interface is NOT the same as the address change. 976 * If it's the same interface, just clear the cached source 977 * address. 978 */ 979 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 980 ((ifn == NULL) || 981 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 982 /* clear any cached route */ 983 RTFREE(net->ro.ro_rt); 984 net->ro.ro_rt = NULL; 985 } 986 /* clear any cached source address */ 987 if (net->src_addr_selected) { 988 sctp_free_ifa(net->ro._s_addr); 989 net->ro._s_addr = NULL; 990 net->src_addr_selected = 0; 991 } 992 } 993 } 994 995 996 void 997 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 998 { 999 int error; 1000 1001 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 1002 return; 1003 } 1004 if (stcb->asoc.deleted_primary == NULL) { 1005 return; 1006 } 1007 1008 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 1009 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 1010 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1011 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 1012 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 1013 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 1014 stcb->asoc.deleted_primary, 1015 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1016 stcb->asoc.num_send_timers_up--; 1017 if (stcb->asoc.num_send_timers_up < 0) { 1018 stcb->asoc.num_send_timers_up = 0; 1019 } 1020 SCTP_TCB_LOCK_ASSERT(stcb); 1021 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1022 stcb->asoc.deleted_primary); 1023 if (error) { 1024 SCTP_INP_DECR_REF(stcb->sctp_ep); 1025 return; 1026 } 1027 SCTP_TCB_LOCK_ASSERT(stcb); 1028 #ifdef SCTP_AUDITING_ENABLED 1029 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1030 #endif 1031 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1032 if ((stcb->asoc.num_send_timers_up == 0) && 1033 (stcb->asoc.sent_queue_cnt > 0)) { 1034 struct sctp_tmit_chunk *chk; 1035 1036 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1037 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1038 stcb, chk->whoTo); 1039 } 1040 } 1041 return; 1042 } 1043 1044 static int 1045 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1046 1047 void 1048 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1049 { 1050 struct sctp_tmit_chunk *chk; 1051 1052 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1053 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1054 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4); 1055 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1056 net->error_count = 0; 1057 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1058 if (chk->whoTo == net) { 1059 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1060 chk->sent = SCTP_DATAGRAM_RESEND; 1061 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1062 sctp_flight_size_decrease(chk); 1063 sctp_total_flight_decrease(stcb, chk); 1064 net->marked_retrans++; 1065 stcb->asoc.marked_retrans++; 1066 } 1067 } 1068 } 1069 if (net->marked_retrans) { 1070 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1071 } 1072 } 1073 1074 static void 1075 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1076 { 1077 struct sctp_nets *net; 1078 int addrnum, changed; 1079 1080 /* 1081 * If number of local valid addresses is 1, the valid address is 1082 * probably newly added address. Several valid addresses in this 1083 * association. A source address may not be changed. Additionally, 1084 * they can be configured on a same interface as "alias" addresses. 1085 * (by micchie) 1086 */ 1087 addrnum = sctp_local_addr_count(stcb); 1088 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1089 addrnum); 1090 if (addrnum == 1) { 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 /* Retransmit unacknowledged DATA chunks immediately */ 1103 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1104 SCTP_MOBILITY_FASTHANDOFF)) { 1105 sctp_net_immediate_retrans(stcb, net); 1106 } 1107 /* also, SET PRIMARY is maybe already sent */ 1108 } 1109 return; 1110 } 1111 1112 /* Multiple local addresses exsist in the association. */ 1113 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1114 /* clear any cached route and source address */ 1115 if (net->ro.ro_rt) { 1116 RTFREE(net->ro.ro_rt); 1117 net->ro.ro_rt = NULL; 1118 } 1119 if (net->src_addr_selected) { 1120 sctp_free_ifa(net->ro._s_addr); 1121 net->ro._s_addr = NULL; 1122 net->src_addr_selected = 0; 1123 } 1124 /* 1125 * Check if the nexthop is corresponding to the new address. 1126 * If the new address is corresponding to the current 1127 * nexthop, the path will be changed. If the new address is 1128 * NOT corresponding to the current nexthop, the path will 1129 * not be changed. 1130 */ 1131 SCTP_RTALLOC((sctp_route_t *)&net->ro, 1132 stcb->sctp_ep->def_vrf_id, 1133 stcb->sctp_ep->fibnum); 1134 if (net->ro.ro_rt == NULL) 1135 continue; 1136 1137 changed = 0; 1138 switch (net->ro._l_addr.sa.sa_family) { 1139 #ifdef INET 1140 case AF_INET: 1141 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) { 1142 changed = 1; 1143 } 1144 break; 1145 #endif 1146 #ifdef INET6 1147 case AF_INET6: 1148 if (sctp_v6src_match_nexthop( 1149 &newifa->address.sin6, (sctp_route_t *)&net->ro)) { 1150 changed = 1; 1151 } 1152 break; 1153 #endif 1154 default: 1155 break; 1156 } 1157 /* 1158 * if the newly added address does not relate routing 1159 * information, we skip. 1160 */ 1161 if (changed == 0) 1162 continue; 1163 /* Retransmit unacknowledged DATA chunks immediately */ 1164 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1165 SCTP_MOBILITY_FASTHANDOFF)) { 1166 sctp_net_immediate_retrans(stcb, net); 1167 } 1168 /* Send SET PRIMARY for this new address */ 1169 if (net == stcb->asoc.primary_destination) { 1170 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1171 SCTP_SET_PRIM_ADDR); 1172 } 1173 } 1174 } 1175 1176 /* 1177 * process an ADD/DELETE IP ack from peer. 1178 * addr: corresponding sctp_ifa to the address being added/deleted. 1179 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1180 * flag: 1=success, 0=failure. 1181 */ 1182 static void 1183 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1184 { 1185 /* 1186 * do the necessary asoc list work- if we get a failure indication, 1187 * leave the address on the assoc's restricted list. If we get a 1188 * success indication, remove the address from the restricted list. 1189 */ 1190 /* 1191 * Note: this will only occur for ADD_IP_ADDRESS, since 1192 * DEL_IP_ADDRESS is never actually added to the list... 1193 */ 1194 if (flag) { 1195 /* success case, so remove from the restricted list */ 1196 sctp_del_local_addr_restricted(stcb, addr); 1197 1198 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1199 SCTP_MOBILITY_BASE) || 1200 sctp_is_mobility_feature_on(stcb->sctp_ep, 1201 SCTP_MOBILITY_FASTHANDOFF)) { 1202 sctp_path_check_and_react(stcb, addr); 1203 return; 1204 } 1205 /* clear any cached/topologically incorrect source addresses */ 1206 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1207 } 1208 /* else, leave it on the list */ 1209 } 1210 1211 /* 1212 * add an asconf add/delete/set primary IP address parameter to the queue. 1213 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1214 * returns 0 if queued, -1 if not queued/removed. 1215 * NOTE: if adding, but a delete for the same address is already scheduled 1216 * (and not yet sent out), simply remove it from queue. Same for deleting 1217 * an address already scheduled for add. If a duplicate operation is found, 1218 * ignore the new one. 1219 */ 1220 static int 1221 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1222 uint16_t type) 1223 { 1224 struct sctp_asconf_addr *aa, *aa_next; 1225 1226 /* make sure the request isn't already in the queue */ 1227 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1228 /* address match? */ 1229 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1230 continue; 1231 /* 1232 * is the request already in queue but not sent? pass the 1233 * request already sent in order to resolve the following 1234 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1235 * can't remove the ADD request already sent 3. arrival of 1236 * ADD 1237 */ 1238 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1239 return (-1); 1240 } 1241 /* is the negative request already in queue, and not sent */ 1242 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1243 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1244 /* add requested, delete already queued */ 1245 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1246 /* remove the ifa from the restricted list */ 1247 sctp_del_local_addr_restricted(stcb, ifa); 1248 /* free the asconf param */ 1249 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1250 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1251 return (-1); 1252 } 1253 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1254 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1255 /* delete requested, add already queued */ 1256 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1257 /* remove the aa->ifa from the restricted list */ 1258 sctp_del_local_addr_restricted(stcb, aa->ifa); 1259 /* free the asconf param */ 1260 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1261 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1262 return (-1); 1263 } 1264 } /* for each aa */ 1265 1266 /* adding new request to the queue */ 1267 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1268 SCTP_M_ASC_ADDR); 1269 if (aa == NULL) { 1270 /* didn't get memory */ 1271 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1272 return (-1); 1273 } 1274 aa->special_del = 0; 1275 /* fill in asconf address parameter fields */ 1276 /* top level elements are "networked" during send */ 1277 aa->ap.aph.ph.param_type = type; 1278 aa->ifa = ifa; 1279 atomic_add_int(&ifa->refcount, 1); 1280 /* correlation_id filled in during send routine later... */ 1281 switch (ifa->address.sa.sa_family) { 1282 #ifdef INET6 1283 case AF_INET6: 1284 { 1285 struct sockaddr_in6 *sin6; 1286 1287 sin6 = &ifa->address.sin6; 1288 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1289 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1290 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1291 sizeof(struct sctp_ipv6addr_param); 1292 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1293 sizeof(struct in6_addr)); 1294 break; 1295 } 1296 #endif 1297 #ifdef INET 1298 case AF_INET: 1299 { 1300 struct sockaddr_in *sin; 1301 1302 sin = &ifa->address.sin; 1303 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1304 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1305 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1306 sizeof(struct sctp_ipv4addr_param); 1307 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1308 sizeof(struct in_addr)); 1309 break; 1310 } 1311 #endif 1312 default: 1313 /* invalid family! */ 1314 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1315 sctp_free_ifa(ifa); 1316 return (-1); 1317 } 1318 aa->sent = 0; /* clear sent flag */ 1319 1320 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1321 #ifdef SCTP_DEBUG 1322 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1323 if (type == SCTP_ADD_IP_ADDRESS) { 1324 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1325 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1326 } else if (type == SCTP_DEL_IP_ADDRESS) { 1327 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1328 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1329 } else { 1330 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1331 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1332 } 1333 } 1334 #endif 1335 1336 return (0); 1337 } 1338 1339 1340 /* 1341 * add an asconf operation for the given ifa and type. 1342 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1343 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1344 * advisable. 1345 */ 1346 static int 1347 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1348 uint16_t type) 1349 { 1350 uint32_t status; 1351 int pending_delete_queued = 0; 1352 int last; 1353 1354 /* see if peer supports ASCONF */ 1355 if (stcb->asoc.asconf_supported == 0) { 1356 return (-1); 1357 } 1358 1359 /* 1360 * if this is deleting the last address from the assoc, mark it as 1361 * pending. 1362 */ 1363 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { 1364 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1365 last = (sctp_local_addr_count(stcb) == 0); 1366 } else { 1367 last = (sctp_local_addr_count(stcb) == 1); 1368 } 1369 if (last) { 1370 /* set the pending delete info only */ 1371 stcb->asoc.asconf_del_pending = 1; 1372 stcb->asoc.asconf_addr_del_pending = ifa; 1373 atomic_add_int(&ifa->refcount, 1); 1374 SCTPDBG(SCTP_DEBUG_ASCONF2, 1375 "asconf_queue_add: mark delete last address pending\n"); 1376 return (-1); 1377 } 1378 } 1379 1380 /* queue an asconf parameter */ 1381 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1382 1383 /* 1384 * if this is an add, and there is a delete also pending (i.e. the 1385 * last local address is being changed), queue the pending delete 1386 * too. 1387 */ 1388 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1389 /* queue in the pending delete */ 1390 if (sctp_asconf_queue_mgmt(stcb, 1391 stcb->asoc.asconf_addr_del_pending, 1392 SCTP_DEL_IP_ADDRESS) == 0) { 1393 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n"); 1394 pending_delete_queued = 1; 1395 /* clear out the pending delete info */ 1396 stcb->asoc.asconf_del_pending = 0; 1397 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1398 stcb->asoc.asconf_addr_del_pending = NULL; 1399 } 1400 } 1401 1402 if (pending_delete_queued) { 1403 struct sctp_nets *net; 1404 1405 /* 1406 * since we know that the only/last address is now being 1407 * changed in this case, reset the cwnd/rto on all nets to 1408 * start as a new address and path. Also clear the error 1409 * counts to give the assoc the best chance to complete the 1410 * address change. 1411 */ 1412 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1413 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1414 net); 1415 net->RTO = 0; 1416 net->error_count = 0; 1417 } 1418 stcb->asoc.overall_error_count = 0; 1419 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1420 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1421 stcb->asoc.overall_error_count, 1422 0, 1423 SCTP_FROM_SCTP_ASCONF, 1424 __LINE__); 1425 } 1426 1427 /* queue in an advisory set primary too */ 1428 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1429 /* let caller know we should send this out immediately */ 1430 status = 1; 1431 } 1432 return (status); 1433 } 1434 1435 /*- 1436 * add an asconf delete IP address parameter to the queue by sockaddr and 1437 * possibly with no sctp_ifa available. This is only called by the routine 1438 * that checks the addresses in an INIT-ACK against the current address list. 1439 * returns 0 if completed, non-zero if not completed. 1440 * NOTE: if an add is already scheduled (and not yet sent out), simply 1441 * remove it from queue. If a duplicate operation is found, ignore the 1442 * new one. 1443 */ 1444 static int 1445 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1446 { 1447 struct sctp_ifa *ifa; 1448 struct sctp_asconf_addr *aa, *aa_next; 1449 1450 if (stcb == NULL) { 1451 return (-1); 1452 } 1453 /* see if peer supports ASCONF */ 1454 if (stcb->asoc.asconf_supported == 0) { 1455 return (-1); 1456 } 1457 /* make sure the request isn't already in the queue */ 1458 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1459 /* address match? */ 1460 if (sctp_asconf_addr_match(aa, sa) == 0) 1461 continue; 1462 /* is the request already in queue (sent or not) */ 1463 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1464 return (-1); 1465 } 1466 /* is the negative request already in queue, and not sent */ 1467 if (aa->sent == 1) 1468 continue; 1469 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1470 /* add already queued, so remove existing entry */ 1471 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1472 sctp_del_local_addr_restricted(stcb, aa->ifa); 1473 /* free the entry */ 1474 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1475 return (-1); 1476 } 1477 } /* for each aa */ 1478 1479 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1480 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1481 1482 /* adding new request to the queue */ 1483 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1484 SCTP_M_ASC_ADDR); 1485 if (aa == NULL) { 1486 /* didn't get memory */ 1487 SCTPDBG(SCTP_DEBUG_ASCONF1, 1488 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1489 return (-1); 1490 } 1491 aa->special_del = 0; 1492 /* fill in asconf address parameter fields */ 1493 /* top level elements are "networked" during send */ 1494 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1495 aa->ifa = ifa; 1496 if (ifa) 1497 atomic_add_int(&ifa->refcount, 1); 1498 /* correlation_id filled in during send routine later... */ 1499 switch (sa->sa_family) { 1500 #ifdef INET6 1501 case AF_INET6: 1502 { 1503 /* IPv6 address */ 1504 struct sockaddr_in6 *sin6; 1505 1506 sin6 = (struct sockaddr_in6 *)sa; 1507 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1508 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1509 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1510 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1511 sizeof(struct in6_addr)); 1512 break; 1513 } 1514 #endif 1515 #ifdef INET 1516 case AF_INET: 1517 { 1518 /* IPv4 address */ 1519 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1520 1521 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1522 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1523 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1524 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1525 sizeof(struct in_addr)); 1526 break; 1527 } 1528 #endif 1529 default: 1530 /* invalid family! */ 1531 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1532 if (ifa) 1533 sctp_free_ifa(ifa); 1534 return (-1); 1535 } 1536 aa->sent = 0; /* clear sent flag */ 1537 1538 /* delete goes to the back of the queue */ 1539 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1540 1541 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1542 return (0); 1543 } 1544 1545 /* 1546 * find a specific asconf param on our "sent" queue 1547 */ 1548 static struct sctp_asconf_addr * 1549 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1550 { 1551 struct sctp_asconf_addr *aa; 1552 1553 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1554 if (aa->ap.aph.correlation_id == correlation_id && 1555 aa->sent == 1) { 1556 /* found it */ 1557 return (aa); 1558 } 1559 } 1560 /* didn't find it */ 1561 return (NULL); 1562 } 1563 1564 /* 1565 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1566 * notifications based on the error response 1567 */ 1568 static void 1569 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1570 struct sctp_asconf_paramhdr *aph) 1571 { 1572 struct sctp_error_cause *eh; 1573 struct sctp_paramhdr *ph; 1574 uint16_t param_type; 1575 uint16_t error_code; 1576 1577 eh = (struct sctp_error_cause *)(aph + 1); 1578 ph = (struct sctp_paramhdr *)(eh + 1); 1579 /* validate lengths */ 1580 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1581 htons(aph->ph.param_length)) { 1582 /* invalid error cause length */ 1583 SCTPDBG(SCTP_DEBUG_ASCONF1, 1584 "asconf_process_error: cause element too long\n"); 1585 return; 1586 } 1587 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1588 htons(eh->length)) { 1589 /* invalid included TLV length */ 1590 SCTPDBG(SCTP_DEBUG_ASCONF1, 1591 "asconf_process_error: included TLV too long\n"); 1592 return; 1593 } 1594 /* which error code ? */ 1595 error_code = ntohs(eh->code); 1596 param_type = ntohs(aph->ph.param_type); 1597 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1598 switch (error_code) { 1599 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1600 /* we allow ourselves to "try again" for this error */ 1601 break; 1602 default: 1603 /* peer can't handle it... */ 1604 switch (param_type) { 1605 case SCTP_ADD_IP_ADDRESS: 1606 case SCTP_DEL_IP_ADDRESS: 1607 case SCTP_SET_PRIM_ADDR: 1608 break; 1609 default: 1610 break; 1611 } 1612 } 1613 } 1614 1615 /* 1616 * process an asconf queue param. 1617 * aparam: parameter to process, will be removed from the queue. 1618 * flag: 1=success case, 0=failure case 1619 */ 1620 static void 1621 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1622 struct sctp_asconf_addr *aparam, uint32_t flag) 1623 { 1624 uint16_t param_type; 1625 1626 /* process this param */ 1627 param_type = aparam->ap.aph.ph.param_type; 1628 switch (param_type) { 1629 case SCTP_ADD_IP_ADDRESS: 1630 SCTPDBG(SCTP_DEBUG_ASCONF1, 1631 "process_param_ack: added IP address\n"); 1632 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1633 break; 1634 case SCTP_DEL_IP_ADDRESS: 1635 SCTPDBG(SCTP_DEBUG_ASCONF1, 1636 "process_param_ack: deleted IP address\n"); 1637 /* nothing really to do... lists already updated */ 1638 break; 1639 case SCTP_SET_PRIM_ADDR: 1640 SCTPDBG(SCTP_DEBUG_ASCONF1, 1641 "process_param_ack: set primary IP address\n"); 1642 /* nothing to do... peer may start using this addr */ 1643 break; 1644 default: 1645 /* should NEVER happen */ 1646 break; 1647 } 1648 1649 /* remove the param and free it */ 1650 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1651 if (aparam->ifa) 1652 sctp_free_ifa(aparam->ifa); 1653 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1654 } 1655 1656 /* 1657 * cleanup from a bad asconf ack parameter 1658 */ 1659 static void 1660 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1661 { 1662 /* assume peer doesn't really know how to do asconfs */ 1663 /* XXX we could free the pending queue here */ 1664 1665 } 1666 1667 void 1668 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1669 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1670 struct sctp_nets *net, int *abort_no_unlock) 1671 { 1672 struct sctp_association *asoc; 1673 uint32_t serial_num; 1674 uint16_t ack_length; 1675 struct sctp_asconf_paramhdr *aph; 1676 struct sctp_asconf_addr *aa, *aa_next; 1677 uint32_t last_error_id = 0; /* last error correlation id */ 1678 uint32_t id; 1679 struct sctp_asconf_addr *ap; 1680 1681 /* asconf param buffer */ 1682 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1683 1684 /* verify minimum length */ 1685 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1686 SCTPDBG(SCTP_DEBUG_ASCONF1, 1687 "handle_asconf_ack: chunk too small = %xh\n", 1688 ntohs(cp->ch.chunk_length)); 1689 return; 1690 } 1691 asoc = &stcb->asoc; 1692 serial_num = ntohl(cp->serial_number); 1693 1694 /* 1695 * NOTE: we may want to handle this differently- currently, we will 1696 * abort when we get an ack for the expected serial number + 1 (eg. 1697 * we didn't send it), process an ack normally if it is the expected 1698 * serial number, and re-send the previous ack for *ALL* other 1699 * serial numbers 1700 */ 1701 1702 /* 1703 * if the serial number is the next expected, but I didn't send it, 1704 * abort the asoc, since someone probably just hijacked us... 1705 */ 1706 if (serial_num == (asoc->asconf_seq_out + 1)) { 1707 struct mbuf *op_err; 1708 char msg[SCTP_DIAG_INFO_LEN]; 1709 1710 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1711 snprintf(msg, sizeof(msg), "Never sent serial number %8.8x", 1712 serial_num); 1713 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg); 1714 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); 1715 *abort_no_unlock = 1; 1716 return; 1717 } 1718 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1719 /* got a duplicate/unexpected ASCONF-ACK */ 1720 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1721 serial_num, asoc->asconf_seq_out_acked + 1); 1722 return; 1723 } 1724 1725 if (serial_num == asoc->asconf_seq_out - 1) { 1726 /* stop our timer */ 1727 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, 1728 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1729 } 1730 1731 /* process the ASCONF-ACK contents */ 1732 ack_length = ntohs(cp->ch.chunk_length) - 1733 sizeof(struct sctp_asconf_ack_chunk); 1734 offset += sizeof(struct sctp_asconf_ack_chunk); 1735 /* process through all parameters */ 1736 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1737 unsigned int param_length, param_type; 1738 1739 /* get pointer to next asconf parameter */ 1740 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1741 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1742 if (aph == NULL) { 1743 /* can't get an asconf paramhdr */ 1744 sctp_asconf_ack_clear(stcb); 1745 return; 1746 } 1747 param_type = ntohs(aph->ph.param_type); 1748 param_length = ntohs(aph->ph.param_length); 1749 if (param_length > ack_length) { 1750 sctp_asconf_ack_clear(stcb); 1751 return; 1752 } 1753 if (param_length < sizeof(struct sctp_paramhdr)) { 1754 sctp_asconf_ack_clear(stcb); 1755 return; 1756 } 1757 /* get the complete parameter... */ 1758 if (param_length > sizeof(aparam_buf)) { 1759 SCTPDBG(SCTP_DEBUG_ASCONF1, 1760 "param length (%u) larger than buffer size!\n", param_length); 1761 sctp_asconf_ack_clear(stcb); 1762 return; 1763 } 1764 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1765 if (aph == NULL) { 1766 sctp_asconf_ack_clear(stcb); 1767 return; 1768 } 1769 /* correlation_id is transparent to peer, no ntohl needed */ 1770 id = aph->correlation_id; 1771 1772 switch (param_type) { 1773 case SCTP_ERROR_CAUSE_IND: 1774 last_error_id = id; 1775 /* find the corresponding asconf param in our queue */ 1776 ap = sctp_asconf_find_param(stcb, id); 1777 if (ap == NULL) { 1778 /* hmm... can't find this in our queue! */ 1779 break; 1780 } 1781 /* process the parameter, failed flag */ 1782 sctp_asconf_process_param_ack(stcb, ap, 0); 1783 /* process the error response */ 1784 sctp_asconf_process_error(stcb, aph); 1785 break; 1786 case SCTP_SUCCESS_REPORT: 1787 /* find the corresponding asconf param in our queue */ 1788 ap = sctp_asconf_find_param(stcb, id); 1789 if (ap == NULL) { 1790 /* hmm... can't find this in our queue! */ 1791 break; 1792 } 1793 /* process the parameter, success flag */ 1794 sctp_asconf_process_param_ack(stcb, ap, 1); 1795 break; 1796 default: 1797 break; 1798 } /* switch */ 1799 1800 /* update remaining ASCONF-ACK message length to process */ 1801 ack_length -= SCTP_SIZE32(param_length); 1802 if (ack_length <= 0) { 1803 /* no more data in the mbuf chain */ 1804 break; 1805 } 1806 offset += SCTP_SIZE32(param_length); 1807 } /* while */ 1808 1809 /* 1810 * if there are any "sent" params still on the queue, these are 1811 * implicitly "success", or "failed" (if we got an error back) ... 1812 * so process these appropriately 1813 * 1814 * we assume that the correlation_id's are monotonically increasing 1815 * beginning from 1 and that we don't have *that* many outstanding 1816 * at any given time 1817 */ 1818 if (last_error_id == 0) 1819 last_error_id--; /* set to "max" value */ 1820 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1821 if (aa->sent == 1) { 1822 /* 1823 * implicitly successful or failed if correlation_id 1824 * < last_error_id, then success else, failure 1825 */ 1826 if (aa->ap.aph.correlation_id < last_error_id) 1827 sctp_asconf_process_param_ack(stcb, aa, 1); 1828 else 1829 sctp_asconf_process_param_ack(stcb, aa, 0); 1830 } else { 1831 /* 1832 * since we always process in order (FIFO queue) if 1833 * we reach one that hasn't been sent, the rest 1834 * should not have been sent either. so, we're 1835 * done... 1836 */ 1837 break; 1838 } 1839 } 1840 1841 /* update the next sequence number to use */ 1842 asoc->asconf_seq_out_acked++; 1843 /* remove the old ASCONF on our outbound queue */ 1844 sctp_toss_old_asconf(stcb); 1845 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1846 #ifdef SCTP_TIMER_BASED_ASCONF 1847 /* we have more params, so restart our timer */ 1848 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1849 stcb, net); 1850 #else 1851 /* we have more params, so send out more */ 1852 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1853 #endif 1854 } 1855 } 1856 1857 #ifdef INET6 1858 static uint32_t 1859 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1860 { 1861 struct sockaddr_in6 *sin6, *net6; 1862 struct sctp_nets *net; 1863 1864 if (sa->sa_family != AF_INET6) { 1865 /* wrong family */ 1866 return (0); 1867 } 1868 sin6 = (struct sockaddr_in6 *)sa; 1869 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1870 /* not link local address */ 1871 return (0); 1872 } 1873 /* hunt through our destination nets list for this scope_id */ 1874 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1875 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1876 AF_INET6) 1877 continue; 1878 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1879 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1880 continue; 1881 if (sctp_is_same_scope(sin6, net6)) { 1882 /* found one */ 1883 return (1); 1884 } 1885 } 1886 /* didn't find one */ 1887 return (0); 1888 } 1889 #endif 1890 1891 /* 1892 * address management functions 1893 */ 1894 static void 1895 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1896 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1897 { 1898 int status; 1899 1900 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1901 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1902 /* subset bound, no ASCONF allowed case, so ignore */ 1903 return; 1904 } 1905 /* 1906 * note: we know this is not the subset bound, no ASCONF case eg. 1907 * this is boundall or subset bound w/ASCONF allowed 1908 */ 1909 1910 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1911 switch (ifa->address.sa.sa_family) { 1912 #ifdef INET6 1913 case AF_INET6: 1914 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1915 &ifa->address.sin6.sin6_addr) != 0) { 1916 return; 1917 } 1918 break; 1919 #endif 1920 #ifdef INET 1921 case AF_INET: 1922 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1923 &ifa->address.sin.sin_addr) != 0) { 1924 return; 1925 } 1926 break; 1927 #endif 1928 default: 1929 return; 1930 } 1931 #ifdef INET6 1932 /* make sure we're "allowed" to add this type of addr */ 1933 if (ifa->address.sa.sa_family == AF_INET6) { 1934 /* invalid if we're not a v6 endpoint */ 1935 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1936 return; 1937 /* is the v6 addr really valid ? */ 1938 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1939 return; 1940 } 1941 } 1942 #endif 1943 /* put this address on the "pending/do not use yet" list */ 1944 sctp_add_local_addr_restricted(stcb, ifa); 1945 /* 1946 * check address scope if address is out of scope, don't queue 1947 * anything... note: this would leave the address on both inp and 1948 * asoc lists 1949 */ 1950 switch (ifa->address.sa.sa_family) { 1951 #ifdef INET6 1952 case AF_INET6: 1953 { 1954 struct sockaddr_in6 *sin6; 1955 1956 sin6 = &ifa->address.sin6; 1957 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1958 /* we skip unspecifed addresses */ 1959 return; 1960 } 1961 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1962 if (stcb->asoc.scope.local_scope == 0) { 1963 return; 1964 } 1965 /* is it the right link local scope? */ 1966 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1967 return; 1968 } 1969 } 1970 if (stcb->asoc.scope.site_scope == 0 && 1971 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1972 return; 1973 } 1974 break; 1975 } 1976 #endif 1977 #ifdef INET 1978 case AF_INET: 1979 { 1980 struct sockaddr_in *sin; 1981 1982 /* invalid if we are a v6 only endpoint */ 1983 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1984 SCTP_IPV6_V6ONLY(inp)) 1985 return; 1986 1987 sin = &ifa->address.sin; 1988 if (sin->sin_addr.s_addr == 0) { 1989 /* we skip unspecifed addresses */ 1990 return; 1991 } 1992 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1993 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1994 return; 1995 } 1996 break; 1997 } 1998 #endif 1999 default: 2000 /* else, not AF_INET or AF_INET6, so skip */ 2001 return; 2002 } 2003 2004 /* queue an asconf for this address add/delete */ 2005 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 2006 /* does the peer do asconf? */ 2007 if (stcb->asoc.asconf_supported) { 2008 /* queue an asconf for this addr */ 2009 status = sctp_asconf_queue_add(stcb, ifa, type); 2010 2011 /* 2012 * if queued ok, and in the open state, send out the 2013 * ASCONF. If in the non-open state, these will be 2014 * sent when the state goes open. 2015 */ 2016 if (status == 0 && 2017 ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2018 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 2019 #ifdef SCTP_TIMER_BASED_ASCONF 2020 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 2021 stcb, stcb->asoc.primary_destination); 2022 #else 2023 sctp_send_asconf(stcb, NULL, addr_locked); 2024 #endif 2025 } 2026 } 2027 } 2028 } 2029 2030 2031 int 2032 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2033 { 2034 struct sctp_asconf_iterator *asc; 2035 struct sctp_ifa *ifa; 2036 struct sctp_laddr *l; 2037 int cnt_invalid = 0; 2038 2039 asc = (struct sctp_asconf_iterator *)ptr; 2040 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2041 ifa = l->ifa; 2042 switch (ifa->address.sa.sa_family) { 2043 #ifdef INET6 2044 case AF_INET6: 2045 /* invalid if we're not a v6 endpoint */ 2046 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2047 cnt_invalid++; 2048 if (asc->cnt == cnt_invalid) 2049 return (1); 2050 } 2051 break; 2052 #endif 2053 #ifdef INET 2054 case AF_INET: 2055 { 2056 /* invalid if we are a v6 only endpoint */ 2057 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2058 SCTP_IPV6_V6ONLY(inp)) { 2059 cnt_invalid++; 2060 if (asc->cnt == cnt_invalid) 2061 return (1); 2062 } 2063 break; 2064 } 2065 #endif 2066 default: 2067 /* invalid address family */ 2068 cnt_invalid++; 2069 if (asc->cnt == cnt_invalid) 2070 return (1); 2071 } 2072 } 2073 return (0); 2074 } 2075 2076 static int 2077 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2078 { 2079 struct sctp_ifa *ifa; 2080 struct sctp_asconf_iterator *asc; 2081 struct sctp_laddr *laddr, *nladdr, *l; 2082 2083 /* Only for specific case not bound all */ 2084 asc = (struct sctp_asconf_iterator *)ptr; 2085 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2086 ifa = l->ifa; 2087 if (l->action == SCTP_ADD_IP_ADDRESS) { 2088 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2089 sctp_nxt_addr) { 2090 if (laddr->ifa == ifa) { 2091 laddr->action = 0; 2092 break; 2093 } 2094 2095 } 2096 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2097 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2098 /* remove only after all guys are done */ 2099 if (laddr->ifa == ifa) { 2100 sctp_del_local_addr_ep(inp, ifa); 2101 } 2102 } 2103 } 2104 } 2105 return (0); 2106 } 2107 2108 void 2109 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2110 void *ptr, uint32_t val SCTP_UNUSED) 2111 { 2112 struct sctp_asconf_iterator *asc; 2113 struct sctp_ifa *ifa; 2114 struct sctp_laddr *l; 2115 int cnt_invalid = 0; 2116 int type, status; 2117 int num_queued = 0; 2118 2119 asc = (struct sctp_asconf_iterator *)ptr; 2120 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2121 ifa = l->ifa; 2122 type = l->action; 2123 2124 /* address's vrf_id must be the vrf_id of the assoc */ 2125 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2126 continue; 2127 } 2128 2129 /* Same checks again for assoc */ 2130 switch (ifa->address.sa.sa_family) { 2131 #ifdef INET6 2132 case AF_INET6: 2133 { 2134 /* invalid if we're not a v6 endpoint */ 2135 struct sockaddr_in6 *sin6; 2136 2137 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2138 cnt_invalid++; 2139 if (asc->cnt == cnt_invalid) 2140 return; 2141 else 2142 continue; 2143 } 2144 sin6 = &ifa->address.sin6; 2145 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2146 /* we skip unspecifed addresses */ 2147 continue; 2148 } 2149 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2150 &sin6->sin6_addr) != 0) { 2151 continue; 2152 } 2153 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2154 if (stcb->asoc.scope.local_scope == 0) { 2155 continue; 2156 } 2157 /* is it the right link local scope? */ 2158 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2159 continue; 2160 } 2161 } 2162 break; 2163 } 2164 #endif 2165 #ifdef INET 2166 case AF_INET: 2167 { 2168 /* invalid if we are a v6 only endpoint */ 2169 struct sockaddr_in *sin; 2170 2171 /* invalid if we are a v6 only endpoint */ 2172 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2173 SCTP_IPV6_V6ONLY(inp)) 2174 continue; 2175 2176 sin = &ifa->address.sin; 2177 if (sin->sin_addr.s_addr == 0) { 2178 /* we skip unspecifed addresses */ 2179 continue; 2180 } 2181 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2182 &sin->sin_addr) != 0) { 2183 continue; 2184 } 2185 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2186 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2187 continue; 2188 } 2189 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2190 SCTP_IPV6_V6ONLY(inp)) { 2191 cnt_invalid++; 2192 if (asc->cnt == cnt_invalid) 2193 return; 2194 else 2195 continue; 2196 } 2197 break; 2198 } 2199 #endif 2200 default: 2201 /* invalid address family */ 2202 cnt_invalid++; 2203 if (asc->cnt == cnt_invalid) 2204 return; 2205 else 2206 continue; 2207 break; 2208 } 2209 2210 if (type == SCTP_ADD_IP_ADDRESS) { 2211 /* prevent this address from being used as a source */ 2212 sctp_add_local_addr_restricted(stcb, ifa); 2213 } else if (type == SCTP_DEL_IP_ADDRESS) { 2214 struct sctp_nets *net; 2215 2216 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2217 sctp_rtentry_t *rt; 2218 2219 /* delete this address if cached */ 2220 if (net->ro._s_addr == ifa) { 2221 sctp_free_ifa(net->ro._s_addr); 2222 net->ro._s_addr = NULL; 2223 net->src_addr_selected = 0; 2224 rt = net->ro.ro_rt; 2225 if (rt) { 2226 RTFREE(rt); 2227 net->ro.ro_rt = NULL; 2228 } 2229 /* 2230 * Now we deleted our src address, 2231 * should we not also now reset the 2232 * cwnd/rto to start as if its a new 2233 * address? 2234 */ 2235 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2236 net->RTO = 0; 2237 2238 } 2239 } 2240 } else if (type == SCTP_SET_PRIM_ADDR) { 2241 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2242 /* must validate the ifa is in the ep */ 2243 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2244 continue; 2245 } 2246 } else { 2247 /* Need to check scopes for this guy */ 2248 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2249 continue; 2250 } 2251 } 2252 } 2253 /* queue an asconf for this address add/delete */ 2254 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2255 stcb->asoc.asconf_supported == 1) { 2256 /* queue an asconf for this addr */ 2257 status = sctp_asconf_queue_add(stcb, ifa, type); 2258 /* 2259 * if queued ok, and in the open state, update the 2260 * count of queued params. If in the non-open 2261 * state, these get sent when the assoc goes open. 2262 */ 2263 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2264 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2265 if (status >= 0) { 2266 num_queued++; 2267 } 2268 } 2269 } 2270 } 2271 /* 2272 * If we have queued params in the open state, send out an ASCONF. 2273 */ 2274 if (num_queued > 0) { 2275 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2276 } 2277 } 2278 2279 void 2280 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2281 { 2282 struct sctp_asconf_iterator *asc; 2283 struct sctp_ifa *ifa; 2284 struct sctp_laddr *l, *nl; 2285 2286 asc = (struct sctp_asconf_iterator *)ptr; 2287 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2288 ifa = l->ifa; 2289 if (l->action == SCTP_ADD_IP_ADDRESS) { 2290 /* Clear the defer use flag */ 2291 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2292 } 2293 sctp_free_ifa(ifa); 2294 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2295 SCTP_DECR_LADDR_COUNT(); 2296 } 2297 SCTP_FREE(asc, SCTP_M_ASC_IT); 2298 } 2299 2300 /* 2301 * sa is the sockaddr to ask the peer to set primary to. 2302 * returns: 0 = completed, -1 = error 2303 */ 2304 int32_t 2305 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2306 { 2307 uint32_t vrf_id; 2308 struct sctp_ifa *ifa; 2309 2310 /* find the ifa for the desired set primary */ 2311 vrf_id = stcb->asoc.vrf_id; 2312 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2313 if (ifa == NULL) { 2314 /* Invalid address */ 2315 return (-1); 2316 } 2317 2318 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2319 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2320 /* set primary queuing succeeded */ 2321 SCTPDBG(SCTP_DEBUG_ASCONF1, 2322 "set_primary_ip_address_sa: queued on tcb=%p, ", 2323 (void *)stcb); 2324 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2325 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2326 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2327 #ifdef SCTP_TIMER_BASED_ASCONF 2328 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2329 stcb->sctp_ep, stcb, 2330 stcb->asoc.primary_destination); 2331 #else 2332 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2333 #endif 2334 } 2335 } else { 2336 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2337 (void *)stcb); 2338 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2339 return (-1); 2340 } 2341 return (0); 2342 } 2343 2344 int 2345 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2346 { 2347 struct sctp_tmit_chunk *chk, *nchk; 2348 unsigned int offset, asconf_limit; 2349 struct sctp_asconf_chunk *acp; 2350 struct sctp_asconf_paramhdr *aph; 2351 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2352 struct sctp_paramhdr *ph; 2353 int add_cnt, del_cnt; 2354 uint16_t last_param_type; 2355 2356 add_cnt = del_cnt = 0; 2357 last_param_type = 0; 2358 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2359 if (chk->data == NULL) { 2360 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2361 continue; 2362 } 2363 offset = 0; 2364 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2365 offset += sizeof(struct sctp_asconf_chunk); 2366 asconf_limit = ntohs(acp->ch.chunk_length); 2367 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2368 if (ph == NULL) { 2369 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2370 continue; 2371 } 2372 offset += ntohs(ph->param_length); 2373 2374 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2375 if (aph == NULL) { 2376 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2377 continue; 2378 } 2379 while (aph != NULL) { 2380 unsigned int param_length, param_type; 2381 2382 param_type = ntohs(aph->ph.param_type); 2383 param_length = ntohs(aph->ph.param_length); 2384 if (offset + param_length > asconf_limit) { 2385 /* parameter goes beyond end of chunk! */ 2386 break; 2387 } 2388 if (param_length > sizeof(aparam_buf)) { 2389 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2390 break; 2391 } 2392 if (param_length <= sizeof(struct sctp_paramhdr)) { 2393 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2394 break; 2395 } 2396 2397 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2398 if (aph == NULL) { 2399 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2400 break; 2401 } 2402 2403 ph = (struct sctp_paramhdr *)(aph + 1); 2404 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2405 switch (param_type) { 2406 case SCTP_ADD_IP_ADDRESS: 2407 add_cnt++; 2408 break; 2409 case SCTP_DEL_IP_ADDRESS: 2410 del_cnt++; 2411 break; 2412 default: 2413 break; 2414 } 2415 last_param_type = param_type; 2416 } 2417 2418 offset += SCTP_SIZE32(param_length); 2419 if (offset >= asconf_limit) { 2420 /* no more data in the mbuf chain */ 2421 break; 2422 } 2423 /* get pointer to next asconf param */ 2424 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2425 } 2426 } 2427 2428 /* 2429 * we want to find the sequences which consist of ADD -> DEL -> ADD 2430 * or DEL -> ADD 2431 */ 2432 if (add_cnt > del_cnt || 2433 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2434 return (1); 2435 } 2436 return (0); 2437 } 2438 2439 static struct sockaddr * 2440 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2441 { 2442 struct sctp_vrf *vrf = NULL; 2443 struct sctp_ifn *sctp_ifn; 2444 struct sctp_ifa *sctp_ifa; 2445 2446 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2447 SCTP_IPI_ADDR_RLOCK(); 2448 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2449 if (vrf == NULL) { 2450 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2451 SCTP_IPI_ADDR_RUNLOCK(); 2452 return (NULL); 2453 } 2454 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2455 if (stcb->asoc.scope.loopback_scope == 0 && 2456 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2457 /* Skip if loopback_scope not set */ 2458 continue; 2459 } 2460 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2461 switch (sctp_ifa->address.sa.sa_family) { 2462 #ifdef INET 2463 case AF_INET: 2464 if (stcb->asoc.scope.ipv4_addr_legal) { 2465 struct sockaddr_in *sin; 2466 2467 sin = &sctp_ifa->address.sin; 2468 if (sin->sin_addr.s_addr == 0) { 2469 /* skip unspecifed addresses */ 2470 continue; 2471 } 2472 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2473 &sin->sin_addr) != 0) { 2474 continue; 2475 } 2476 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2477 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2478 continue; 2479 2480 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2481 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2482 continue; 2483 /* 2484 * found a valid local v4 address to 2485 * use 2486 */ 2487 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2488 SCTP_IPI_ADDR_RUNLOCK(); 2489 return (&sctp_ifa->address.sa); 2490 } 2491 break; 2492 #endif 2493 #ifdef INET6 2494 case AF_INET6: 2495 if (stcb->asoc.scope.ipv6_addr_legal) { 2496 struct sockaddr_in6 *sin6; 2497 2498 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2499 continue; 2500 } 2501 2502 sin6 = &sctp_ifa->address.sin6; 2503 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2504 /* 2505 * we skip unspecifed 2506 * addresses 2507 */ 2508 continue; 2509 } 2510 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2511 &sin6->sin6_addr) != 0) { 2512 continue; 2513 } 2514 if (stcb->asoc.scope.local_scope == 0 && 2515 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2516 continue; 2517 if (stcb->asoc.scope.site_scope == 0 && 2518 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2519 continue; 2520 2521 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2522 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2523 continue; 2524 /* 2525 * found a valid local v6 address to 2526 * use 2527 */ 2528 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2529 SCTP_IPI_ADDR_RUNLOCK(); 2530 return (&sctp_ifa->address.sa); 2531 } 2532 break; 2533 #endif 2534 default: 2535 break; 2536 } 2537 } 2538 } 2539 /* no valid addresses found */ 2540 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2541 SCTP_IPI_ADDR_RUNLOCK(); 2542 return (NULL); 2543 } 2544 2545 static struct sockaddr * 2546 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2547 { 2548 struct sctp_laddr *laddr; 2549 2550 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2551 if (laddr->ifa == NULL) { 2552 continue; 2553 } 2554 /* is the address restricted ? */ 2555 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2556 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2557 continue; 2558 2559 /* found a valid local address to use */ 2560 return (&laddr->ifa->address.sa); 2561 } 2562 /* no valid addresses found */ 2563 return (NULL); 2564 } 2565 2566 /* 2567 * builds an ASCONF chunk from queued ASCONF params. 2568 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2569 */ 2570 struct mbuf * 2571 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2572 { 2573 struct mbuf *m_asconf, *m_asconf_chk; 2574 struct sctp_asconf_addr *aa; 2575 struct sctp_asconf_chunk *acp; 2576 struct sctp_asconf_paramhdr *aph; 2577 struct sctp_asconf_addr_param *aap; 2578 uint32_t p_length; 2579 uint32_t correlation_id = 1; /* 0 is reserved... */ 2580 caddr_t ptr, lookup_ptr; 2581 uint8_t lookup_used = 0; 2582 2583 /* are there any asconf params to send? */ 2584 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2585 if (aa->sent == 0) 2586 break; 2587 } 2588 if (aa == NULL) 2589 return (NULL); 2590 2591 /* 2592 * get a chunk header mbuf and a cluster for the asconf params since 2593 * it's simpler to fill in the asconf chunk header lookup address on 2594 * the fly 2595 */ 2596 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2597 if (m_asconf_chk == NULL) { 2598 /* no mbuf's */ 2599 SCTPDBG(SCTP_DEBUG_ASCONF1, 2600 "compose_asconf: couldn't get chunk mbuf!\n"); 2601 return (NULL); 2602 } 2603 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2604 if (m_asconf == NULL) { 2605 /* no mbuf's */ 2606 SCTPDBG(SCTP_DEBUG_ASCONF1, 2607 "compose_asconf: couldn't get mbuf!\n"); 2608 sctp_m_freem(m_asconf_chk); 2609 return (NULL); 2610 } 2611 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2612 SCTP_BUF_LEN(m_asconf) = 0; 2613 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2614 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2615 /* save pointers to lookup address and asconf params */ 2616 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2617 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2618 2619 /* fill in chunk header info */ 2620 acp->ch.chunk_type = SCTP_ASCONF; 2621 acp->ch.chunk_flags = 0; 2622 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2623 stcb->asoc.asconf_seq_out++; 2624 2625 /* add parameters... up to smallest MTU allowed */ 2626 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2627 if (aa->sent) 2628 continue; 2629 /* get the parameter length */ 2630 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2631 /* will it fit in current chunk? */ 2632 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2633 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2634 /* won't fit, so we're done with this chunk */ 2635 break; 2636 } 2637 /* assign (and store) a correlation id */ 2638 aa->ap.aph.correlation_id = correlation_id++; 2639 2640 /* 2641 * fill in address if we're doing a delete this is a simple 2642 * way for us to fill in the correlation address, which 2643 * should only be used by the peer if we're deleting our 2644 * source address and adding a new address (e.g. renumbering 2645 * case) 2646 */ 2647 if (lookup_used == 0 && 2648 (aa->special_del == 0) && 2649 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2650 struct sctp_ipv6addr_param *lookup; 2651 uint16_t p_size, addr_size; 2652 2653 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2654 lookup->ph.param_type = 2655 htons(aa->ap.addrp.ph.param_type); 2656 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2657 /* copy IPv6 address */ 2658 p_size = sizeof(struct sctp_ipv6addr_param); 2659 addr_size = sizeof(struct in6_addr); 2660 } else { 2661 /* copy IPv4 address */ 2662 p_size = sizeof(struct sctp_ipv4addr_param); 2663 addr_size = sizeof(struct in_addr); 2664 } 2665 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2666 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2667 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2668 lookup_used = 1; 2669 } 2670 /* copy into current space */ 2671 memcpy(ptr, &aa->ap, p_length); 2672 2673 /* network elements and update lengths */ 2674 aph = (struct sctp_asconf_paramhdr *)ptr; 2675 aap = (struct sctp_asconf_addr_param *)ptr; 2676 /* correlation_id is transparent to peer, no htonl needed */ 2677 aph->ph.param_type = htons(aph->ph.param_type); 2678 aph->ph.param_length = htons(aph->ph.param_length); 2679 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2680 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2681 2682 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2683 ptr += SCTP_SIZE32(p_length); 2684 2685 /* 2686 * these params are removed off the pending list upon 2687 * getting an ASCONF-ACK back from the peer, just set flag 2688 */ 2689 aa->sent = 1; 2690 } 2691 /* check to see if the lookup addr has been populated yet */ 2692 if (lookup_used == 0) { 2693 /* NOTE: if the address param is optional, can skip this... */ 2694 /* add any valid (existing) address... */ 2695 struct sctp_ipv6addr_param *lookup; 2696 uint16_t p_size, addr_size; 2697 struct sockaddr *found_addr; 2698 caddr_t addr_ptr; 2699 2700 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2701 found_addr = sctp_find_valid_localaddr(stcb, 2702 addr_locked); 2703 else 2704 found_addr = sctp_find_valid_localaddr_ep(stcb); 2705 2706 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2707 if (found_addr != NULL) { 2708 switch (found_addr->sa_family) { 2709 #ifdef INET6 2710 case AF_INET6: 2711 /* copy IPv6 address */ 2712 lookup->ph.param_type = 2713 htons(SCTP_IPV6_ADDRESS); 2714 p_size = sizeof(struct sctp_ipv6addr_param); 2715 addr_size = sizeof(struct in6_addr); 2716 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2717 found_addr)->sin6_addr; 2718 break; 2719 #endif 2720 #ifdef INET 2721 case AF_INET: 2722 /* copy IPv4 address */ 2723 lookup->ph.param_type = 2724 htons(SCTP_IPV4_ADDRESS); 2725 p_size = sizeof(struct sctp_ipv4addr_param); 2726 addr_size = sizeof(struct in_addr); 2727 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2728 found_addr)->sin_addr; 2729 break; 2730 #endif 2731 default: 2732 p_size = 0; 2733 addr_size = 0; 2734 addr_ptr = NULL; 2735 break; 2736 } 2737 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2738 memcpy(lookup->addr, addr_ptr, addr_size); 2739 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2740 } else { 2741 /* uh oh... don't have any address?? */ 2742 SCTPDBG(SCTP_DEBUG_ASCONF1, 2743 "compose_asconf: no lookup addr!\n"); 2744 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2745 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2746 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2747 memset(lookup->addr, 0, sizeof(struct in_addr)); 2748 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2749 } 2750 } 2751 /* chain it all together */ 2752 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2753 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2754 acp->ch.chunk_length = htons(*retlen); 2755 2756 return (m_asconf_chk); 2757 } 2758 2759 /* 2760 * section to handle address changes before an association is up eg. changes 2761 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2762 */ 2763 2764 /* 2765 * processes the (local) addresses in the INIT-ACK chunk 2766 */ 2767 static void 2768 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2769 unsigned int offset, unsigned int length) 2770 { 2771 struct sctp_paramhdr tmp_param, *ph; 2772 uint16_t plen, ptype; 2773 struct sctp_ifa *sctp_ifa; 2774 union sctp_sockstore store; 2775 #ifdef INET6 2776 struct sctp_ipv6addr_param addr6_store; 2777 #endif 2778 #ifdef INET 2779 struct sctp_ipv4addr_param addr4_store; 2780 #endif 2781 2782 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2783 if (stcb == NULL) /* Un-needed check for SA */ 2784 return; 2785 2786 /* convert to upper bound */ 2787 length += offset; 2788 2789 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2790 return; 2791 } 2792 /* go through the addresses in the init-ack */ 2793 ph = (struct sctp_paramhdr *) 2794 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2795 (uint8_t *)&tmp_param); 2796 while (ph != NULL) { 2797 ptype = ntohs(ph->param_type); 2798 plen = ntohs(ph->param_length); 2799 switch (ptype) { 2800 #ifdef INET6 2801 case SCTP_IPV6_ADDRESS: 2802 { 2803 struct sctp_ipv6addr_param *a6p; 2804 2805 /* get the entire IPv6 address param */ 2806 a6p = (struct sctp_ipv6addr_param *) 2807 sctp_m_getptr(m, offset, 2808 sizeof(struct sctp_ipv6addr_param), 2809 (uint8_t *)&addr6_store); 2810 if (plen != sizeof(struct sctp_ipv6addr_param) || 2811 a6p == NULL) { 2812 return; 2813 } 2814 memset(&store, 0, sizeof(union sctp_sockstore)); 2815 store.sin6.sin6_family = AF_INET6; 2816 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2817 store.sin6.sin6_port = stcb->rport; 2818 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2819 break; 2820 } 2821 #endif 2822 #ifdef INET 2823 case SCTP_IPV4_ADDRESS: 2824 { 2825 struct sctp_ipv4addr_param *a4p; 2826 2827 /* get the entire IPv4 address param */ 2828 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2829 sizeof(struct sctp_ipv4addr_param), 2830 (uint8_t *)&addr4_store); 2831 if (plen != sizeof(struct sctp_ipv4addr_param) || 2832 a4p == NULL) { 2833 return; 2834 } 2835 memset(&store, 0, sizeof(union sctp_sockstore)); 2836 store.sin.sin_family = AF_INET; 2837 store.sin.sin_len = sizeof(struct sockaddr_in); 2838 store.sin.sin_port = stcb->rport; 2839 store.sin.sin_addr.s_addr = a4p->addr; 2840 break; 2841 } 2842 #endif 2843 default: 2844 goto next_addr; 2845 } 2846 2847 /* see if this address really (still) exists */ 2848 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2849 SCTP_ADDR_NOT_LOCKED); 2850 if (sctp_ifa == NULL) { 2851 /* address doesn't exist anymore */ 2852 int status; 2853 2854 /* are ASCONFs allowed ? */ 2855 if ((sctp_is_feature_on(stcb->sctp_ep, 2856 SCTP_PCB_FLAGS_DO_ASCONF)) && 2857 stcb->asoc.asconf_supported) { 2858 /* queue an ASCONF DEL_IP_ADDRESS */ 2859 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2860 /* 2861 * if queued ok, and in correct state, send 2862 * out the ASCONF. 2863 */ 2864 if (status == 0 && 2865 SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) { 2866 #ifdef SCTP_TIMER_BASED_ASCONF 2867 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2868 stcb->sctp_ep, stcb, 2869 stcb->asoc.primary_destination); 2870 #else 2871 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2872 #endif 2873 } 2874 } 2875 } 2876 2877 next_addr: 2878 /* 2879 * Sanity check: Make sure the length isn't 0, otherwise 2880 * we'll be stuck in this loop for a long time... 2881 */ 2882 if (SCTP_SIZE32(plen) == 0) { 2883 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2884 plen, ptype); 2885 return; 2886 } 2887 /* get next parameter */ 2888 offset += SCTP_SIZE32(plen); 2889 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2890 return; 2891 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2892 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2893 } /* while */ 2894 } 2895 2896 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2897 /* 2898 * checks to see if a specific address is in the initack address list returns 2899 * 1 if found, 0 if not 2900 */ 2901 static uint32_t 2902 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2903 { 2904 struct sctp_paramhdr tmp_param, *ph; 2905 uint16_t plen, ptype; 2906 #ifdef INET 2907 struct sockaddr_in *sin; 2908 struct sctp_ipv4addr_param *a4p; 2909 struct sctp_ipv6addr_param addr4_store; 2910 #endif 2911 #ifdef INET6 2912 struct sockaddr_in6 *sin6; 2913 struct sctp_ipv6addr_param *a6p; 2914 struct sctp_ipv6addr_param addr6_store; 2915 struct sockaddr_in6 sin6_tmp; 2916 #endif 2917 2918 switch (sa->sa_family) { 2919 #ifdef INET 2920 case AF_INET: 2921 break; 2922 #endif 2923 #ifdef INET6 2924 case AF_INET6: 2925 break; 2926 #endif 2927 default: 2928 return (0); 2929 } 2930 2931 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2932 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2933 /* convert to upper bound */ 2934 length += offset; 2935 2936 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2937 SCTPDBG(SCTP_DEBUG_ASCONF1, 2938 "find_initack_addr: invalid offset?\n"); 2939 return (0); 2940 } 2941 /* go through the addresses in the init-ack */ 2942 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2943 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2944 while (ph != NULL) { 2945 ptype = ntohs(ph->param_type); 2946 plen = ntohs(ph->param_length); 2947 switch (ptype) { 2948 #ifdef INET6 2949 case SCTP_IPV6_ADDRESS: 2950 if (sa->sa_family == AF_INET6) { 2951 /* get the entire IPv6 address param */ 2952 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2953 break; 2954 } 2955 /* get the entire IPv6 address param */ 2956 a6p = (struct sctp_ipv6addr_param *) 2957 sctp_m_getptr(m, offset, 2958 sizeof(struct sctp_ipv6addr_param), 2959 (uint8_t *)&addr6_store); 2960 if (a6p == NULL) { 2961 return (0); 2962 } 2963 sin6 = (struct sockaddr_in6 *)sa; 2964 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2965 /* create a copy and clear scope */ 2966 memcpy(&sin6_tmp, sin6, 2967 sizeof(struct sockaddr_in6)); 2968 sin6 = &sin6_tmp; 2969 in6_clearscope(&sin6->sin6_addr); 2970 } 2971 if (memcmp(&sin6->sin6_addr, a6p->addr, 2972 sizeof(struct in6_addr)) == 0) { 2973 /* found it */ 2974 return (1); 2975 } 2976 } 2977 break; 2978 #endif /* INET6 */ 2979 #ifdef INET 2980 case SCTP_IPV4_ADDRESS: 2981 if (sa->sa_family == AF_INET) { 2982 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2983 break; 2984 } 2985 /* get the entire IPv4 address param */ 2986 a4p = (struct sctp_ipv4addr_param *) 2987 sctp_m_getptr(m, offset, 2988 sizeof(struct sctp_ipv4addr_param), 2989 (uint8_t *)&addr4_store); 2990 if (a4p == NULL) { 2991 return (0); 2992 } 2993 sin = (struct sockaddr_in *)sa; 2994 if (sin->sin_addr.s_addr == a4p->addr) { 2995 /* found it */ 2996 return (1); 2997 } 2998 } 2999 break; 3000 #endif 3001 default: 3002 break; 3003 } 3004 /* get next parameter */ 3005 offset += SCTP_SIZE32(plen); 3006 if (offset + sizeof(struct sctp_paramhdr) > length) { 3007 return (0); 3008 } 3009 ph = (struct sctp_paramhdr *) 3010 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3011 (uint8_t *)&tmp_param); 3012 } /* while */ 3013 /* not found! */ 3014 return (0); 3015 } 3016 3017 /* 3018 * makes sure that the current endpoint local addr list is consistent with 3019 * the new association (eg. subset bound, asconf allowed) adds addresses as 3020 * necessary 3021 */ 3022 static void 3023 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3024 int length, struct sockaddr *init_addr) 3025 { 3026 struct sctp_laddr *laddr; 3027 3028 /* go through the endpoint list */ 3029 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3030 /* be paranoid and validate the laddr */ 3031 if (laddr->ifa == NULL) { 3032 SCTPDBG(SCTP_DEBUG_ASCONF1, 3033 "check_addr_list_ep: laddr->ifa is NULL"); 3034 continue; 3035 } 3036 if (laddr->ifa == NULL) { 3037 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3038 continue; 3039 } 3040 /* do i have it implicitly? */ 3041 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3042 continue; 3043 } 3044 /* check to see if in the init-ack */ 3045 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3046 /* try to add it */ 3047 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3048 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3049 } 3050 } 3051 } 3052 3053 /* 3054 * makes sure that the current kernel address list is consistent with the new 3055 * association (with all addrs bound) adds addresses as necessary 3056 */ 3057 static void 3058 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3059 int length, struct sockaddr *init_addr, 3060 uint16_t local_scope, uint16_t site_scope, 3061 uint16_t ipv4_scope, uint16_t loopback_scope) 3062 { 3063 struct sctp_vrf *vrf = NULL; 3064 struct sctp_ifn *sctp_ifn; 3065 struct sctp_ifa *sctp_ifa; 3066 uint32_t vrf_id; 3067 #ifdef INET 3068 struct sockaddr_in *sin; 3069 #endif 3070 #ifdef INET6 3071 struct sockaddr_in6 *sin6; 3072 #endif 3073 3074 if (stcb) { 3075 vrf_id = stcb->asoc.vrf_id; 3076 } else { 3077 return; 3078 } 3079 SCTP_IPI_ADDR_RLOCK(); 3080 vrf = sctp_find_vrf(vrf_id); 3081 if (vrf == NULL) { 3082 SCTP_IPI_ADDR_RUNLOCK(); 3083 return; 3084 } 3085 /* go through all our known interfaces */ 3086 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3087 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3088 /* skip loopback interface */ 3089 continue; 3090 } 3091 /* go through each interface address */ 3092 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3093 /* do i have it implicitly? */ 3094 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3095 continue; 3096 } 3097 switch (sctp_ifa->address.sa.sa_family) { 3098 #ifdef INET 3099 case AF_INET: 3100 sin = &sctp_ifa->address.sin; 3101 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3102 &sin->sin_addr) != 0) { 3103 continue; 3104 } 3105 if ((ipv4_scope == 0) && 3106 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3107 /* private address not in scope */ 3108 continue; 3109 } 3110 break; 3111 #endif 3112 #ifdef INET6 3113 case AF_INET6: 3114 sin6 = &sctp_ifa->address.sin6; 3115 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3116 &sin6->sin6_addr) != 0) { 3117 continue; 3118 } 3119 if ((local_scope == 0) && 3120 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3121 continue; 3122 } 3123 if ((site_scope == 0) && 3124 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3125 continue; 3126 } 3127 break; 3128 #endif 3129 default: 3130 break; 3131 } 3132 /* check to see if in the init-ack */ 3133 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3134 /* try to add it */ 3135 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3136 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3137 SCTP_ADDR_LOCKED); 3138 } 3139 } /* end foreach ifa */ 3140 } /* end foreach ifn */ 3141 SCTP_IPI_ADDR_RUNLOCK(); 3142 } 3143 3144 /* 3145 * validates an init-ack chunk (from a cookie-echo) with current addresses 3146 * adds addresses from the init-ack into our local address list, if needed 3147 * queues asconf adds/deletes addresses as needed and makes appropriate list 3148 * changes for source address selection m, offset: points to the start of the 3149 * address list in an init-ack chunk length: total length of the address 3150 * params only init_addr: address where my INIT-ACK was sent from 3151 */ 3152 void 3153 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3154 int length, struct sockaddr *init_addr, 3155 uint16_t local_scope, uint16_t site_scope, 3156 uint16_t ipv4_scope, uint16_t loopback_scope) 3157 { 3158 /* process the local addresses in the initack */ 3159 sctp_process_initack_addresses(stcb, m, offset, length); 3160 3161 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3162 /* bound all case */ 3163 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3164 local_scope, site_scope, ipv4_scope, loopback_scope); 3165 } else { 3166 /* subset bound case */ 3167 if (sctp_is_feature_on(stcb->sctp_ep, 3168 SCTP_PCB_FLAGS_DO_ASCONF)) { 3169 /* asconf's allowed */ 3170 sctp_check_address_list_ep(stcb, m, offset, length, 3171 init_addr); 3172 } 3173 /* else, no asconfs allowed, so what we sent is what we get */ 3174 } 3175 } 3176 3177 /* 3178 * sctp_bindx() support 3179 */ 3180 uint32_t 3181 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3182 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3183 { 3184 struct sctp_ifa *ifa; 3185 struct sctp_laddr *laddr, *nladdr; 3186 3187 if (sa->sa_len == 0) { 3188 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3189 return (EINVAL); 3190 } 3191 if (sctp_ifap) { 3192 ifa = sctp_ifap; 3193 } else if (type == SCTP_ADD_IP_ADDRESS) { 3194 /* For an add the address MUST be on the system */ 3195 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3196 } else if (type == SCTP_DEL_IP_ADDRESS) { 3197 /* For a delete we need to find it in the inp */ 3198 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3199 } else { 3200 ifa = NULL; 3201 } 3202 if (ifa != NULL) { 3203 if (type == SCTP_ADD_IP_ADDRESS) { 3204 sctp_add_local_addr_ep(inp, ifa, type); 3205 } else if (type == SCTP_DEL_IP_ADDRESS) { 3206 if (inp->laddr_count < 2) { 3207 /* can't delete the last local address */ 3208 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3209 return (EINVAL); 3210 } 3211 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3212 sctp_nxt_addr) { 3213 if (ifa == laddr->ifa) { 3214 /* Mark in the delete */ 3215 laddr->action = type; 3216 } 3217 } 3218 } 3219 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3220 /* 3221 * There is no need to start the iterator if the inp 3222 * has no associations. 3223 */ 3224 if (type == SCTP_DEL_IP_ADDRESS) { 3225 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3226 if (laddr->ifa == ifa) { 3227 sctp_del_local_addr_ep(inp, ifa); 3228 } 3229 } 3230 } 3231 } else { 3232 struct sctp_asconf_iterator *asc; 3233 struct sctp_laddr *wi; 3234 int ret; 3235 3236 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3237 sizeof(struct sctp_asconf_iterator), 3238 SCTP_M_ASC_IT); 3239 if (asc == NULL) { 3240 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3241 return (ENOMEM); 3242 } 3243 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3244 if (wi == NULL) { 3245 SCTP_FREE(asc, SCTP_M_ASC_IT); 3246 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3247 return (ENOMEM); 3248 } 3249 LIST_INIT(&asc->list_of_work); 3250 asc->cnt = 1; 3251 SCTP_INCR_LADDR_COUNT(); 3252 wi->ifa = ifa; 3253 wi->action = type; 3254 atomic_add_int(&ifa->refcount, 1); 3255 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3256 ret = sctp_initiate_iterator(sctp_asconf_iterator_ep, 3257 sctp_asconf_iterator_stcb, 3258 sctp_asconf_iterator_ep_end, 3259 SCTP_PCB_ANY_FLAGS, 3260 SCTP_PCB_ANY_FEATURES, 3261 SCTP_ASOC_ANY_STATE, 3262 (void *)asc, 0, 3263 sctp_asconf_iterator_end, inp, 0); 3264 if (ret) { 3265 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n"); 3266 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT); 3267 sctp_asconf_iterator_end(asc, 0); 3268 return (EFAULT); 3269 } 3270 } 3271 return (0); 3272 } else { 3273 /* invalid address! */ 3274 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3275 return (EADDRNOTAVAIL); 3276 } 3277 } 3278 3279 void 3280 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3281 struct sctp_nets *net) 3282 { 3283 struct sctp_asconf_addr *aa; 3284 struct sctp_ifa *sctp_ifap; 3285 struct sctp_asconf_tag_param *vtag; 3286 #ifdef INET 3287 struct sockaddr_in *to; 3288 #endif 3289 #ifdef INET6 3290 struct sockaddr_in6 *to6; 3291 #endif 3292 if (net == NULL) { 3293 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3294 return; 3295 } 3296 if (stcb == NULL) { 3297 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3298 return; 3299 } 3300 /* 3301 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3302 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3303 */ 3304 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3305 SCTP_M_ASC_ADDR); 3306 if (aa == NULL) { 3307 /* didn't get memory */ 3308 SCTPDBG(SCTP_DEBUG_ASCONF1, 3309 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3310 return; 3311 } 3312 aa->special_del = 0; 3313 /* fill in asconf address parameter fields */ 3314 /* top level elements are "networked" during send */ 3315 aa->ifa = NULL; 3316 aa->sent = 0; /* clear sent flag */ 3317 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3318 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3319 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3320 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3321 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3322 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3323 3324 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3325 SCTP_M_ASC_ADDR); 3326 if (aa == NULL) { 3327 /* didn't get memory */ 3328 SCTPDBG(SCTP_DEBUG_ASCONF1, 3329 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3330 return; 3331 } 3332 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3333 /* fill in asconf address parameter fields */ 3334 /* ADD(0.0.0.0) */ 3335 switch (net->ro._l_addr.sa.sa_family) { 3336 #ifdef INET 3337 case AF_INET: 3338 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3339 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3340 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3341 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3342 /* No need to add an address, we are using 0.0.0.0 */ 3343 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3344 break; 3345 #endif 3346 #ifdef INET6 3347 case AF_INET6: 3348 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3349 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3350 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3351 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3352 /* No need to add an address, we are using 0.0.0.0 */ 3353 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3354 break; 3355 #endif 3356 default: 3357 SCTPDBG(SCTP_DEBUG_ASCONF1, 3358 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3359 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3360 return; 3361 } 3362 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3363 SCTP_M_ASC_ADDR); 3364 if (aa == NULL) { 3365 /* didn't get memory */ 3366 SCTPDBG(SCTP_DEBUG_ASCONF1, 3367 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3368 return; 3369 } 3370 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3371 /* fill in asconf address parameter fields */ 3372 /* ADD(0.0.0.0) */ 3373 switch (net->ro._l_addr.sa.sa_family) { 3374 #ifdef INET 3375 case AF_INET: 3376 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3377 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3378 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3379 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3380 /* No need to add an address, we are using 0.0.0.0 */ 3381 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3382 break; 3383 #endif 3384 #ifdef INET6 3385 case AF_INET6: 3386 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3387 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3388 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3389 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3390 /* No need to add an address, we are using 0.0.0.0 */ 3391 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3392 break; 3393 #endif 3394 default: 3395 SCTPDBG(SCTP_DEBUG_ASCONF1, 3396 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3397 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3398 return; 3399 } 3400 /* Now we must hunt the addresses and add all global addresses */ 3401 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3402 struct sctp_vrf *vrf = NULL; 3403 struct sctp_ifn *sctp_ifnp; 3404 uint32_t vrf_id; 3405 3406 vrf_id = stcb->sctp_ep->def_vrf_id; 3407 vrf = sctp_find_vrf(vrf_id); 3408 if (vrf == NULL) { 3409 goto skip_rest; 3410 } 3411 3412 SCTP_IPI_ADDR_RLOCK(); 3413 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3414 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3415 switch (sctp_ifap->address.sa.sa_family) { 3416 #ifdef INET 3417 case AF_INET: 3418 to = &sctp_ifap->address.sin; 3419 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3420 &to->sin_addr) != 0) { 3421 continue; 3422 } 3423 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3424 continue; 3425 } 3426 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3427 continue; 3428 } 3429 break; 3430 #endif 3431 #ifdef INET6 3432 case AF_INET6: 3433 to6 = &sctp_ifap->address.sin6; 3434 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3435 &to6->sin6_addr) != 0) { 3436 continue; 3437 } 3438 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3439 continue; 3440 } 3441 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3442 continue; 3443 } 3444 break; 3445 #endif 3446 default: 3447 continue; 3448 } 3449 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3450 } 3451 } 3452 SCTP_IPI_ADDR_RUNLOCK(); 3453 } else { 3454 struct sctp_laddr *laddr; 3455 3456 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3457 if (laddr->ifa == NULL) { 3458 continue; 3459 } 3460 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3461 /* 3462 * Address being deleted by the system, dont 3463 * list. 3464 */ 3465 continue; 3466 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3467 /* 3468 * Address being deleted on this ep don't 3469 * list. 3470 */ 3471 continue; 3472 } 3473 sctp_ifap = laddr->ifa; 3474 switch (sctp_ifap->address.sa.sa_family) { 3475 #ifdef INET 3476 case AF_INET: 3477 to = &sctp_ifap->address.sin; 3478 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3479 continue; 3480 } 3481 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3482 continue; 3483 } 3484 break; 3485 #endif 3486 #ifdef INET6 3487 case AF_INET6: 3488 to6 = &sctp_ifap->address.sin6; 3489 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3490 continue; 3491 } 3492 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3493 continue; 3494 } 3495 break; 3496 #endif 3497 default: 3498 continue; 3499 } 3500 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3501 } 3502 } 3503 skip_rest: 3504 /* Now we must send the asconf into the queue */ 3505 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3506 } 3507