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 RO_NHFREE(&net->ro); 984 } 985 /* clear any cached source address */ 986 if (net->src_addr_selected) { 987 sctp_free_ifa(net->ro._s_addr); 988 net->ro._s_addr = NULL; 989 net->src_addr_selected = 0; 990 } 991 } 992 } 993 994 995 void 996 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 997 { 998 int error; 999 1000 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 1001 return; 1002 } 1003 if (stcb->asoc.deleted_primary == NULL) { 1004 return; 1005 } 1006 1007 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 1008 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 1009 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1010 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 1011 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 1012 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 1013 stcb->asoc.deleted_primary, 1014 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1015 stcb->asoc.num_send_timers_up--; 1016 if (stcb->asoc.num_send_timers_up < 0) { 1017 stcb->asoc.num_send_timers_up = 0; 1018 } 1019 SCTP_TCB_LOCK_ASSERT(stcb); 1020 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1021 stcb->asoc.deleted_primary); 1022 if (error) { 1023 SCTP_INP_DECR_REF(stcb->sctp_ep); 1024 return; 1025 } 1026 SCTP_TCB_LOCK_ASSERT(stcb); 1027 #ifdef SCTP_AUDITING_ENABLED 1028 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1029 #endif 1030 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1031 if ((stcb->asoc.num_send_timers_up == 0) && 1032 (stcb->asoc.sent_queue_cnt > 0)) { 1033 struct sctp_tmit_chunk *chk; 1034 1035 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1036 if (chk->whoTo != NULL) { 1037 break; 1038 } 1039 } 1040 if (chk != NULL) { 1041 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); 1042 } 1043 } 1044 } 1045 return; 1046 } 1047 1048 static int 1049 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1050 1051 void 1052 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1053 { 1054 struct sctp_tmit_chunk *chk; 1055 1056 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1057 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1058 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4); 1059 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1060 net->error_count = 0; 1061 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1062 if (chk->whoTo == net) { 1063 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1064 chk->sent = SCTP_DATAGRAM_RESEND; 1065 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1066 sctp_flight_size_decrease(chk); 1067 sctp_total_flight_decrease(stcb, chk); 1068 net->marked_retrans++; 1069 stcb->asoc.marked_retrans++; 1070 } 1071 } 1072 } 1073 if (net->marked_retrans) { 1074 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1075 } 1076 } 1077 1078 static void 1079 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1080 { 1081 struct sctp_nets *net; 1082 int addrnum, changed; 1083 1084 /* 1085 * If number of local valid addresses is 1, the valid address is 1086 * probably newly added address. Several valid addresses in this 1087 * association. A source address may not be changed. Additionally, 1088 * they can be configured on a same interface as "alias" addresses. 1089 * (by micchie) 1090 */ 1091 addrnum = sctp_local_addr_count(stcb); 1092 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1093 addrnum); 1094 if (addrnum == 1) { 1095 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1096 /* clear any cached route and source address */ 1097 RO_NHFREE(&net->ro); 1098 if (net->src_addr_selected) { 1099 sctp_free_ifa(net->ro._s_addr); 1100 net->ro._s_addr = NULL; 1101 net->src_addr_selected = 0; 1102 } 1103 /* Retransmit unacknowledged DATA chunks immediately */ 1104 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1105 SCTP_MOBILITY_FASTHANDOFF)) { 1106 sctp_net_immediate_retrans(stcb, net); 1107 } 1108 /* also, SET PRIMARY is maybe already sent */ 1109 } 1110 return; 1111 } 1112 1113 /* Multiple local addresses exsist in the association. */ 1114 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1115 /* clear any cached route and source address */ 1116 RO_NHFREE(&net->ro); 1117 if (net->src_addr_selected) { 1118 sctp_free_ifa(net->ro._s_addr); 1119 net->ro._s_addr = NULL; 1120 net->src_addr_selected = 0; 1121 } 1122 /* 1123 * Check if the nexthop is corresponding to the new address. 1124 * If the new address is corresponding to the current 1125 * nexthop, the path will be changed. If the new address is 1126 * NOT corresponding to the current nexthop, the path will 1127 * not be changed. 1128 */ 1129 SCTP_RTALLOC((sctp_route_t *)&net->ro, 1130 stcb->sctp_ep->def_vrf_id, 1131 stcb->sctp_ep->fibnum); 1132 if (net->ro.ro_nh == NULL) 1133 continue; 1134 1135 changed = 0; 1136 switch (net->ro._l_addr.sa.sa_family) { 1137 #ifdef INET 1138 case AF_INET: 1139 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) { 1140 changed = 1; 1141 } 1142 break; 1143 #endif 1144 #ifdef INET6 1145 case AF_INET6: 1146 if (sctp_v6src_match_nexthop( 1147 &newifa->address.sin6, (sctp_route_t *)&net->ro)) { 1148 changed = 1; 1149 } 1150 break; 1151 #endif 1152 default: 1153 break; 1154 } 1155 /* 1156 * if the newly added address does not relate routing 1157 * information, we skip. 1158 */ 1159 if (changed == 0) 1160 continue; 1161 /* Retransmit unacknowledged DATA chunks immediately */ 1162 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1163 SCTP_MOBILITY_FASTHANDOFF)) { 1164 sctp_net_immediate_retrans(stcb, net); 1165 } 1166 /* Send SET PRIMARY for this new address */ 1167 if (net == stcb->asoc.primary_destination) { 1168 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1169 SCTP_SET_PRIM_ADDR); 1170 } 1171 } 1172 } 1173 1174 /* 1175 * process an ADD/DELETE IP ack from peer. 1176 * addr: corresponding sctp_ifa to the address being added/deleted. 1177 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1178 * flag: 1=success, 0=failure. 1179 */ 1180 static void 1181 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1182 { 1183 /* 1184 * do the necessary asoc list work- if we get a failure indication, 1185 * leave the address on the assoc's restricted list. If we get a 1186 * success indication, remove the address from the restricted list. 1187 */ 1188 /* 1189 * Note: this will only occur for ADD_IP_ADDRESS, since 1190 * DEL_IP_ADDRESS is never actually added to the list... 1191 */ 1192 if (flag) { 1193 /* success case, so remove from the restricted list */ 1194 sctp_del_local_addr_restricted(stcb, addr); 1195 1196 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1197 SCTP_MOBILITY_BASE) || 1198 sctp_is_mobility_feature_on(stcb->sctp_ep, 1199 SCTP_MOBILITY_FASTHANDOFF)) { 1200 sctp_path_check_and_react(stcb, addr); 1201 return; 1202 } 1203 /* clear any cached/topologically incorrect source addresses */ 1204 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1205 } 1206 /* else, leave it on the list */ 1207 } 1208 1209 /* 1210 * add an asconf add/delete/set primary IP address parameter to the queue. 1211 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1212 * returns 0 if queued, -1 if not queued/removed. 1213 * NOTE: if adding, but a delete for the same address is already scheduled 1214 * (and not yet sent out), simply remove it from queue. Same for deleting 1215 * an address already scheduled for add. If a duplicate operation is found, 1216 * ignore the new one. 1217 */ 1218 static int 1219 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1220 uint16_t type) 1221 { 1222 struct sctp_asconf_addr *aa, *aa_next; 1223 1224 /* make sure the request isn't already in the queue */ 1225 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1226 /* address match? */ 1227 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1228 continue; 1229 /* 1230 * is the request already in queue but not sent? pass the 1231 * request already sent in order to resolve the following 1232 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1233 * can't remove the ADD request already sent 3. arrival of 1234 * ADD 1235 */ 1236 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1237 return (-1); 1238 } 1239 /* is the negative request already in queue, and not sent */ 1240 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1241 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1242 /* add requested, delete already queued */ 1243 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1244 /* remove the ifa from the restricted list */ 1245 sctp_del_local_addr_restricted(stcb, ifa); 1246 /* free the asconf param */ 1247 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1248 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1249 return (-1); 1250 } 1251 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1252 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1253 /* delete requested, add already queued */ 1254 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1255 /* remove the aa->ifa from the restricted list */ 1256 sctp_del_local_addr_restricted(stcb, aa->ifa); 1257 /* free the asconf param */ 1258 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1259 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1260 return (-1); 1261 } 1262 } /* for each aa */ 1263 1264 /* adding new request to the queue */ 1265 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1266 SCTP_M_ASC_ADDR); 1267 if (aa == NULL) { 1268 /* didn't get memory */ 1269 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1270 return (-1); 1271 } 1272 aa->special_del = 0; 1273 /* fill in asconf address parameter fields */ 1274 /* top level elements are "networked" during send */ 1275 aa->ap.aph.ph.param_type = type; 1276 aa->ifa = ifa; 1277 atomic_add_int(&ifa->refcount, 1); 1278 /* correlation_id filled in during send routine later... */ 1279 switch (ifa->address.sa.sa_family) { 1280 #ifdef INET6 1281 case AF_INET6: 1282 { 1283 struct sockaddr_in6 *sin6; 1284 1285 sin6 = &ifa->address.sin6; 1286 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1287 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1288 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1289 sizeof(struct sctp_ipv6addr_param); 1290 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1291 sizeof(struct in6_addr)); 1292 break; 1293 } 1294 #endif 1295 #ifdef INET 1296 case AF_INET: 1297 { 1298 struct sockaddr_in *sin; 1299 1300 sin = &ifa->address.sin; 1301 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1302 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1303 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1304 sizeof(struct sctp_ipv4addr_param); 1305 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1306 sizeof(struct in_addr)); 1307 break; 1308 } 1309 #endif 1310 default: 1311 /* invalid family! */ 1312 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1313 sctp_free_ifa(ifa); 1314 return (-1); 1315 } 1316 aa->sent = 0; /* clear sent flag */ 1317 1318 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1319 #ifdef SCTP_DEBUG 1320 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1321 if (type == SCTP_ADD_IP_ADDRESS) { 1322 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1323 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1324 } else if (type == SCTP_DEL_IP_ADDRESS) { 1325 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1326 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1327 } else { 1328 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1329 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1330 } 1331 } 1332 #endif 1333 1334 return (0); 1335 } 1336 1337 1338 /* 1339 * add an asconf operation for the given ifa and type. 1340 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1341 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1342 * advisable. 1343 */ 1344 static int 1345 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1346 uint16_t type) 1347 { 1348 uint32_t status; 1349 int pending_delete_queued = 0; 1350 int last; 1351 1352 /* see if peer supports ASCONF */ 1353 if (stcb->asoc.asconf_supported == 0) { 1354 return (-1); 1355 } 1356 1357 /* 1358 * if this is deleting the last address from the assoc, mark it as 1359 * pending. 1360 */ 1361 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { 1362 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1363 last = (sctp_local_addr_count(stcb) == 0); 1364 } else { 1365 last = (sctp_local_addr_count(stcb) == 1); 1366 } 1367 if (last) { 1368 /* set the pending delete info only */ 1369 stcb->asoc.asconf_del_pending = 1; 1370 stcb->asoc.asconf_addr_del_pending = ifa; 1371 atomic_add_int(&ifa->refcount, 1); 1372 SCTPDBG(SCTP_DEBUG_ASCONF2, 1373 "asconf_queue_add: mark delete last address pending\n"); 1374 return (-1); 1375 } 1376 } 1377 1378 /* queue an asconf parameter */ 1379 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1380 1381 /* 1382 * if this is an add, and there is a delete also pending (i.e. the 1383 * last local address is being changed), queue the pending delete 1384 * too. 1385 */ 1386 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1387 /* queue in the pending delete */ 1388 if (sctp_asconf_queue_mgmt(stcb, 1389 stcb->asoc.asconf_addr_del_pending, 1390 SCTP_DEL_IP_ADDRESS) == 0) { 1391 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n"); 1392 pending_delete_queued = 1; 1393 /* clear out the pending delete info */ 1394 stcb->asoc.asconf_del_pending = 0; 1395 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1396 stcb->asoc.asconf_addr_del_pending = NULL; 1397 } 1398 } 1399 1400 if (pending_delete_queued) { 1401 struct sctp_nets *net; 1402 1403 /* 1404 * since we know that the only/last address is now being 1405 * changed in this case, reset the cwnd/rto on all nets to 1406 * start as a new address and path. Also clear the error 1407 * counts to give the assoc the best chance to complete the 1408 * address change. 1409 */ 1410 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1411 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1412 net); 1413 net->RTO = 0; 1414 net->error_count = 0; 1415 } 1416 stcb->asoc.overall_error_count = 0; 1417 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1418 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1419 stcb->asoc.overall_error_count, 1420 0, 1421 SCTP_FROM_SCTP_ASCONF, 1422 __LINE__); 1423 } 1424 1425 /* queue in an advisory set primary too */ 1426 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1427 /* let caller know we should send this out immediately */ 1428 status = 1; 1429 } 1430 return (status); 1431 } 1432 1433 /*- 1434 * add an asconf delete IP address parameter to the queue by sockaddr and 1435 * possibly with no sctp_ifa available. This is only called by the routine 1436 * that checks the addresses in an INIT-ACK against the current address list. 1437 * returns 0 if completed, non-zero if not completed. 1438 * NOTE: if an add is already scheduled (and not yet sent out), simply 1439 * remove it from queue. If a duplicate operation is found, ignore the 1440 * new one. 1441 */ 1442 static int 1443 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1444 { 1445 struct sctp_ifa *ifa; 1446 struct sctp_asconf_addr *aa, *aa_next; 1447 1448 if (stcb == NULL) { 1449 return (-1); 1450 } 1451 /* see if peer supports ASCONF */ 1452 if (stcb->asoc.asconf_supported == 0) { 1453 return (-1); 1454 } 1455 /* make sure the request isn't already in the queue */ 1456 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1457 /* address match? */ 1458 if (sctp_asconf_addr_match(aa, sa) == 0) 1459 continue; 1460 /* is the request already in queue (sent or not) */ 1461 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1462 return (-1); 1463 } 1464 /* is the negative request already in queue, and not sent */ 1465 if (aa->sent == 1) 1466 continue; 1467 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1468 /* add already queued, so remove existing entry */ 1469 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1470 sctp_del_local_addr_restricted(stcb, aa->ifa); 1471 /* free the entry */ 1472 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1473 return (-1); 1474 } 1475 } /* for each aa */ 1476 1477 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1478 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1479 1480 /* adding new request to the queue */ 1481 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1482 SCTP_M_ASC_ADDR); 1483 if (aa == NULL) { 1484 /* didn't get memory */ 1485 SCTPDBG(SCTP_DEBUG_ASCONF1, 1486 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1487 return (-1); 1488 } 1489 aa->special_del = 0; 1490 /* fill in asconf address parameter fields */ 1491 /* top level elements are "networked" during send */ 1492 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1493 aa->ifa = ifa; 1494 if (ifa) 1495 atomic_add_int(&ifa->refcount, 1); 1496 /* correlation_id filled in during send routine later... */ 1497 switch (sa->sa_family) { 1498 #ifdef INET6 1499 case AF_INET6: 1500 { 1501 /* IPv6 address */ 1502 struct sockaddr_in6 *sin6; 1503 1504 sin6 = (struct sockaddr_in6 *)sa; 1505 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1506 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1507 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1508 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1509 sizeof(struct in6_addr)); 1510 break; 1511 } 1512 #endif 1513 #ifdef INET 1514 case AF_INET: 1515 { 1516 /* IPv4 address */ 1517 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1518 1519 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1520 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1521 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1522 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1523 sizeof(struct in_addr)); 1524 break; 1525 } 1526 #endif 1527 default: 1528 /* invalid family! */ 1529 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1530 if (ifa) 1531 sctp_free_ifa(ifa); 1532 return (-1); 1533 } 1534 aa->sent = 0; /* clear sent flag */ 1535 1536 /* delete goes to the back of the queue */ 1537 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1538 1539 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1540 return (0); 1541 } 1542 1543 /* 1544 * find a specific asconf param on our "sent" queue 1545 */ 1546 static struct sctp_asconf_addr * 1547 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1548 { 1549 struct sctp_asconf_addr *aa; 1550 1551 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1552 if (aa->ap.aph.correlation_id == correlation_id && 1553 aa->sent == 1) { 1554 /* found it */ 1555 return (aa); 1556 } 1557 } 1558 /* didn't find it */ 1559 return (NULL); 1560 } 1561 1562 /* 1563 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1564 * notifications based on the error response 1565 */ 1566 static void 1567 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1568 struct sctp_asconf_paramhdr *aph) 1569 { 1570 struct sctp_error_cause *eh; 1571 struct sctp_paramhdr *ph; 1572 uint16_t param_type; 1573 uint16_t error_code; 1574 1575 eh = (struct sctp_error_cause *)(aph + 1); 1576 ph = (struct sctp_paramhdr *)(eh + 1); 1577 /* validate lengths */ 1578 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1579 htons(aph->ph.param_length)) { 1580 /* invalid error cause length */ 1581 SCTPDBG(SCTP_DEBUG_ASCONF1, 1582 "asconf_process_error: cause element too long\n"); 1583 return; 1584 } 1585 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1586 htons(eh->length)) { 1587 /* invalid included TLV length */ 1588 SCTPDBG(SCTP_DEBUG_ASCONF1, 1589 "asconf_process_error: included TLV too long\n"); 1590 return; 1591 } 1592 /* which error code ? */ 1593 error_code = ntohs(eh->code); 1594 param_type = ntohs(aph->ph.param_type); 1595 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1596 switch (error_code) { 1597 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1598 /* we allow ourselves to "try again" for this error */ 1599 break; 1600 default: 1601 /* peer can't handle it... */ 1602 switch (param_type) { 1603 case SCTP_ADD_IP_ADDRESS: 1604 case SCTP_DEL_IP_ADDRESS: 1605 case SCTP_SET_PRIM_ADDR: 1606 break; 1607 default: 1608 break; 1609 } 1610 } 1611 } 1612 1613 /* 1614 * process an asconf queue param. 1615 * aparam: parameter to process, will be removed from the queue. 1616 * flag: 1=success case, 0=failure case 1617 */ 1618 static void 1619 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1620 struct sctp_asconf_addr *aparam, uint32_t flag) 1621 { 1622 uint16_t param_type; 1623 1624 /* process this param */ 1625 param_type = aparam->ap.aph.ph.param_type; 1626 switch (param_type) { 1627 case SCTP_ADD_IP_ADDRESS: 1628 SCTPDBG(SCTP_DEBUG_ASCONF1, 1629 "process_param_ack: added IP address\n"); 1630 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1631 break; 1632 case SCTP_DEL_IP_ADDRESS: 1633 SCTPDBG(SCTP_DEBUG_ASCONF1, 1634 "process_param_ack: deleted IP address\n"); 1635 /* nothing really to do... lists already updated */ 1636 break; 1637 case SCTP_SET_PRIM_ADDR: 1638 SCTPDBG(SCTP_DEBUG_ASCONF1, 1639 "process_param_ack: set primary IP address\n"); 1640 /* nothing to do... peer may start using this addr */ 1641 break; 1642 default: 1643 /* should NEVER happen */ 1644 break; 1645 } 1646 1647 /* remove the param and free it */ 1648 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1649 if (aparam->ifa) 1650 sctp_free_ifa(aparam->ifa); 1651 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1652 } 1653 1654 /* 1655 * cleanup from a bad asconf ack parameter 1656 */ 1657 static void 1658 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1659 { 1660 /* assume peer doesn't really know how to do asconfs */ 1661 /* XXX we could free the pending queue here */ 1662 1663 } 1664 1665 void 1666 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1667 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1668 struct sctp_nets *net, int *abort_no_unlock) 1669 { 1670 struct sctp_association *asoc; 1671 uint32_t serial_num; 1672 uint16_t ack_length; 1673 struct sctp_asconf_paramhdr *aph; 1674 struct sctp_asconf_addr *aa, *aa_next; 1675 uint32_t last_error_id = 0; /* last error correlation id */ 1676 uint32_t id; 1677 struct sctp_asconf_addr *ap; 1678 1679 /* asconf param buffer */ 1680 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1681 1682 /* verify minimum length */ 1683 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1684 SCTPDBG(SCTP_DEBUG_ASCONF1, 1685 "handle_asconf_ack: chunk too small = %xh\n", 1686 ntohs(cp->ch.chunk_length)); 1687 return; 1688 } 1689 asoc = &stcb->asoc; 1690 serial_num = ntohl(cp->serial_number); 1691 1692 /* 1693 * NOTE: we may want to handle this differently- currently, we will 1694 * abort when we get an ack for the expected serial number + 1 (eg. 1695 * we didn't send it), process an ack normally if it is the expected 1696 * serial number, and re-send the previous ack for *ALL* other 1697 * serial numbers 1698 */ 1699 1700 /* 1701 * if the serial number is the next expected, but I didn't send it, 1702 * abort the asoc, since someone probably just hijacked us... 1703 */ 1704 if (serial_num == (asoc->asconf_seq_out + 1)) { 1705 struct mbuf *op_err; 1706 char msg[SCTP_DIAG_INFO_LEN]; 1707 1708 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1709 SCTP_SNPRINTF(msg, sizeof(msg), "Never sent serial number %8.8x", serial_num); 1710 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg); 1711 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); 1712 *abort_no_unlock = 1; 1713 return; 1714 } 1715 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1716 /* got a duplicate/unexpected ASCONF-ACK */ 1717 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1718 serial_num, asoc->asconf_seq_out_acked + 1); 1719 return; 1720 } 1721 1722 if (serial_num == asoc->asconf_seq_out - 1) { 1723 /* stop our timer */ 1724 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, 1725 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1726 } 1727 1728 /* process the ASCONF-ACK contents */ 1729 ack_length = ntohs(cp->ch.chunk_length) - 1730 sizeof(struct sctp_asconf_ack_chunk); 1731 offset += sizeof(struct sctp_asconf_ack_chunk); 1732 /* process through all parameters */ 1733 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1734 unsigned int param_length, param_type; 1735 1736 /* get pointer to next asconf parameter */ 1737 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1738 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1739 if (aph == NULL) { 1740 /* can't get an asconf paramhdr */ 1741 sctp_asconf_ack_clear(stcb); 1742 return; 1743 } 1744 param_type = ntohs(aph->ph.param_type); 1745 param_length = ntohs(aph->ph.param_length); 1746 if (param_length > ack_length) { 1747 sctp_asconf_ack_clear(stcb); 1748 return; 1749 } 1750 if (param_length < sizeof(struct sctp_paramhdr)) { 1751 sctp_asconf_ack_clear(stcb); 1752 return; 1753 } 1754 /* get the complete parameter... */ 1755 if (param_length > sizeof(aparam_buf)) { 1756 SCTPDBG(SCTP_DEBUG_ASCONF1, 1757 "param length (%u) larger than buffer size!\n", param_length); 1758 sctp_asconf_ack_clear(stcb); 1759 return; 1760 } 1761 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1762 if (aph == NULL) { 1763 sctp_asconf_ack_clear(stcb); 1764 return; 1765 } 1766 /* correlation_id is transparent to peer, no ntohl needed */ 1767 id = aph->correlation_id; 1768 1769 switch (param_type) { 1770 case SCTP_ERROR_CAUSE_IND: 1771 last_error_id = id; 1772 /* find the corresponding asconf param in our queue */ 1773 ap = sctp_asconf_find_param(stcb, id); 1774 if (ap == NULL) { 1775 /* hmm... can't find this in our queue! */ 1776 break; 1777 } 1778 /* process the parameter, failed flag */ 1779 sctp_asconf_process_param_ack(stcb, ap, 0); 1780 /* process the error response */ 1781 sctp_asconf_process_error(stcb, aph); 1782 break; 1783 case SCTP_SUCCESS_REPORT: 1784 /* find the corresponding asconf param in our queue */ 1785 ap = sctp_asconf_find_param(stcb, id); 1786 if (ap == NULL) { 1787 /* hmm... can't find this in our queue! */ 1788 break; 1789 } 1790 /* process the parameter, success flag */ 1791 sctp_asconf_process_param_ack(stcb, ap, 1); 1792 break; 1793 default: 1794 break; 1795 } /* switch */ 1796 1797 /* update remaining ASCONF-ACK message length to process */ 1798 if (ack_length > SCTP_SIZE32(param_length)) { 1799 ack_length -= SCTP_SIZE32(param_length); 1800 } else { 1801 break; 1802 } 1803 offset += SCTP_SIZE32(param_length); 1804 } /* while */ 1805 1806 /* 1807 * if there are any "sent" params still on the queue, these are 1808 * implicitly "success", or "failed" (if we got an error back) ... 1809 * so process these appropriately 1810 * 1811 * we assume that the correlation_id's are monotonically increasing 1812 * beginning from 1 and that we don't have *that* many outstanding 1813 * at any given time 1814 */ 1815 if (last_error_id == 0) 1816 last_error_id--; /* set to "max" value */ 1817 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1818 if (aa->sent == 1) { 1819 /* 1820 * implicitly successful or failed if correlation_id 1821 * < last_error_id, then success else, failure 1822 */ 1823 if (aa->ap.aph.correlation_id < last_error_id) 1824 sctp_asconf_process_param_ack(stcb, aa, 1); 1825 else 1826 sctp_asconf_process_param_ack(stcb, aa, 0); 1827 } else { 1828 /* 1829 * since we always process in order (FIFO queue) if 1830 * we reach one that hasn't been sent, the rest 1831 * should not have been sent either. so, we're 1832 * done... 1833 */ 1834 break; 1835 } 1836 } 1837 1838 /* update the next sequence number to use */ 1839 asoc->asconf_seq_out_acked++; 1840 /* remove the old ASCONF on our outbound queue */ 1841 sctp_toss_old_asconf(stcb); 1842 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1843 #ifdef SCTP_TIMER_BASED_ASCONF 1844 /* we have more params, so restart our timer */ 1845 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1846 stcb, net); 1847 #else 1848 /* we have more params, so send out more */ 1849 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1850 #endif 1851 } 1852 } 1853 1854 #ifdef INET6 1855 static uint32_t 1856 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1857 { 1858 struct sockaddr_in6 *sin6, *net6; 1859 struct sctp_nets *net; 1860 1861 if (sa->sa_family != AF_INET6) { 1862 /* wrong family */ 1863 return (0); 1864 } 1865 sin6 = (struct sockaddr_in6 *)sa; 1866 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1867 /* not link local address */ 1868 return (0); 1869 } 1870 /* hunt through our destination nets list for this scope_id */ 1871 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1872 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1873 AF_INET6) 1874 continue; 1875 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1876 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1877 continue; 1878 if (sctp_is_same_scope(sin6, net6)) { 1879 /* found one */ 1880 return (1); 1881 } 1882 } 1883 /* didn't find one */ 1884 return (0); 1885 } 1886 #endif 1887 1888 /* 1889 * address management functions 1890 */ 1891 static void 1892 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1893 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1894 { 1895 int status; 1896 1897 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1898 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1899 /* subset bound, no ASCONF allowed case, so ignore */ 1900 return; 1901 } 1902 /* 1903 * note: we know this is not the subset bound, no ASCONF case eg. 1904 * this is boundall or subset bound w/ASCONF allowed 1905 */ 1906 1907 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1908 switch (ifa->address.sa.sa_family) { 1909 #ifdef INET6 1910 case AF_INET6: 1911 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1912 &ifa->address.sin6.sin6_addr) != 0) { 1913 return; 1914 } 1915 break; 1916 #endif 1917 #ifdef INET 1918 case AF_INET: 1919 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1920 &ifa->address.sin.sin_addr) != 0) { 1921 return; 1922 } 1923 break; 1924 #endif 1925 default: 1926 return; 1927 } 1928 #ifdef INET6 1929 /* make sure we're "allowed" to add this type of addr */ 1930 if (ifa->address.sa.sa_family == AF_INET6) { 1931 /* invalid if we're not a v6 endpoint */ 1932 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1933 return; 1934 /* is the v6 addr really valid ? */ 1935 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1936 return; 1937 } 1938 } 1939 #endif 1940 /* put this address on the "pending/do not use yet" list */ 1941 sctp_add_local_addr_restricted(stcb, ifa); 1942 /* 1943 * check address scope if address is out of scope, don't queue 1944 * anything... note: this would leave the address on both inp and 1945 * asoc lists 1946 */ 1947 switch (ifa->address.sa.sa_family) { 1948 #ifdef INET6 1949 case AF_INET6: 1950 { 1951 struct sockaddr_in6 *sin6; 1952 1953 sin6 = &ifa->address.sin6; 1954 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1955 /* we skip unspecifed addresses */ 1956 return; 1957 } 1958 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1959 if (stcb->asoc.scope.local_scope == 0) { 1960 return; 1961 } 1962 /* is it the right link local scope? */ 1963 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1964 return; 1965 } 1966 } 1967 if (stcb->asoc.scope.site_scope == 0 && 1968 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1969 return; 1970 } 1971 break; 1972 } 1973 #endif 1974 #ifdef INET 1975 case AF_INET: 1976 { 1977 struct sockaddr_in *sin; 1978 1979 /* invalid if we are a v6 only endpoint */ 1980 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1981 SCTP_IPV6_V6ONLY(inp)) 1982 return; 1983 1984 sin = &ifa->address.sin; 1985 if (sin->sin_addr.s_addr == 0) { 1986 /* we skip unspecifed addresses */ 1987 return; 1988 } 1989 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1990 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1991 return; 1992 } 1993 break; 1994 } 1995 #endif 1996 default: 1997 /* else, not AF_INET or AF_INET6, so skip */ 1998 return; 1999 } 2000 2001 /* queue an asconf for this address add/delete */ 2002 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 2003 /* does the peer do asconf? */ 2004 if (stcb->asoc.asconf_supported) { 2005 /* queue an asconf for this addr */ 2006 status = sctp_asconf_queue_add(stcb, ifa, type); 2007 2008 /* 2009 * if queued ok, and in the open state, send out the 2010 * ASCONF. If in the non-open state, these will be 2011 * sent when the state goes open. 2012 */ 2013 if (status == 0 && 2014 ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2015 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 2016 #ifdef SCTP_TIMER_BASED_ASCONF 2017 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 2018 stcb, stcb->asoc.primary_destination); 2019 #else 2020 sctp_send_asconf(stcb, NULL, addr_locked); 2021 #endif 2022 } 2023 } 2024 } 2025 } 2026 2027 2028 int 2029 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2030 { 2031 struct sctp_asconf_iterator *asc; 2032 struct sctp_ifa *ifa; 2033 struct sctp_laddr *l; 2034 int cnt_invalid = 0; 2035 2036 asc = (struct sctp_asconf_iterator *)ptr; 2037 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2038 ifa = l->ifa; 2039 switch (ifa->address.sa.sa_family) { 2040 #ifdef INET6 2041 case AF_INET6: 2042 /* invalid if we're not a v6 endpoint */ 2043 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2044 cnt_invalid++; 2045 if (asc->cnt == cnt_invalid) 2046 return (1); 2047 } 2048 break; 2049 #endif 2050 #ifdef INET 2051 case AF_INET: 2052 { 2053 /* invalid if we are a v6 only endpoint */ 2054 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2055 SCTP_IPV6_V6ONLY(inp)) { 2056 cnt_invalid++; 2057 if (asc->cnt == cnt_invalid) 2058 return (1); 2059 } 2060 break; 2061 } 2062 #endif 2063 default: 2064 /* invalid address family */ 2065 cnt_invalid++; 2066 if (asc->cnt == cnt_invalid) 2067 return (1); 2068 } 2069 } 2070 return (0); 2071 } 2072 2073 static int 2074 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2075 { 2076 struct sctp_ifa *ifa; 2077 struct sctp_asconf_iterator *asc; 2078 struct sctp_laddr *laddr, *nladdr, *l; 2079 2080 /* Only for specific case not bound all */ 2081 asc = (struct sctp_asconf_iterator *)ptr; 2082 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2083 ifa = l->ifa; 2084 if (l->action == SCTP_ADD_IP_ADDRESS) { 2085 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2086 sctp_nxt_addr) { 2087 if (laddr->ifa == ifa) { 2088 laddr->action = 0; 2089 break; 2090 } 2091 2092 } 2093 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2094 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2095 /* remove only after all guys are done */ 2096 if (laddr->ifa == ifa) { 2097 sctp_del_local_addr_ep(inp, ifa); 2098 } 2099 } 2100 } 2101 } 2102 return (0); 2103 } 2104 2105 void 2106 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2107 void *ptr, uint32_t val SCTP_UNUSED) 2108 { 2109 struct sctp_asconf_iterator *asc; 2110 struct sctp_ifa *ifa; 2111 struct sctp_laddr *l; 2112 int cnt_invalid = 0; 2113 int type, status; 2114 int num_queued = 0; 2115 2116 asc = (struct sctp_asconf_iterator *)ptr; 2117 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2118 ifa = l->ifa; 2119 type = l->action; 2120 2121 /* address's vrf_id must be the vrf_id of the assoc */ 2122 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2123 continue; 2124 } 2125 2126 /* Same checks again for assoc */ 2127 switch (ifa->address.sa.sa_family) { 2128 #ifdef INET6 2129 case AF_INET6: 2130 { 2131 /* invalid if we're not a v6 endpoint */ 2132 struct sockaddr_in6 *sin6; 2133 2134 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2135 cnt_invalid++; 2136 if (asc->cnt == cnt_invalid) 2137 return; 2138 else 2139 continue; 2140 } 2141 sin6 = &ifa->address.sin6; 2142 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2143 /* we skip unspecifed addresses */ 2144 continue; 2145 } 2146 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2147 &sin6->sin6_addr) != 0) { 2148 continue; 2149 } 2150 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2151 if (stcb->asoc.scope.local_scope == 0) { 2152 continue; 2153 } 2154 /* is it the right link local scope? */ 2155 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2156 continue; 2157 } 2158 } 2159 break; 2160 } 2161 #endif 2162 #ifdef INET 2163 case AF_INET: 2164 { 2165 /* invalid if we are a v6 only endpoint */ 2166 struct sockaddr_in *sin; 2167 2168 /* invalid if we are a v6 only endpoint */ 2169 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2170 SCTP_IPV6_V6ONLY(inp)) 2171 continue; 2172 2173 sin = &ifa->address.sin; 2174 if (sin->sin_addr.s_addr == 0) { 2175 /* we skip unspecifed addresses */ 2176 continue; 2177 } 2178 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2179 &sin->sin_addr) != 0) { 2180 continue; 2181 } 2182 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2183 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2184 continue; 2185 } 2186 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2187 SCTP_IPV6_V6ONLY(inp)) { 2188 cnt_invalid++; 2189 if (asc->cnt == cnt_invalid) 2190 return; 2191 else 2192 continue; 2193 } 2194 break; 2195 } 2196 #endif 2197 default: 2198 /* invalid address family */ 2199 cnt_invalid++; 2200 if (asc->cnt == cnt_invalid) 2201 return; 2202 else 2203 continue; 2204 break; 2205 } 2206 2207 if (type == SCTP_ADD_IP_ADDRESS) { 2208 /* prevent this address from being used as a source */ 2209 sctp_add_local_addr_restricted(stcb, ifa); 2210 } else if (type == SCTP_DEL_IP_ADDRESS) { 2211 struct sctp_nets *net; 2212 2213 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2214 /* delete this address if cached */ 2215 if (net->ro._s_addr == ifa) { 2216 sctp_free_ifa(net->ro._s_addr); 2217 net->ro._s_addr = NULL; 2218 net->src_addr_selected = 0; 2219 RO_NHFREE(&net->ro); 2220 /* 2221 * Now we deleted our src address, 2222 * should we not also now reset the 2223 * cwnd/rto to start as if its a new 2224 * address? 2225 */ 2226 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2227 net->RTO = 0; 2228 2229 } 2230 } 2231 } else if (type == SCTP_SET_PRIM_ADDR) { 2232 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2233 /* must validate the ifa is in the ep */ 2234 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2235 continue; 2236 } 2237 } else { 2238 /* Need to check scopes for this guy */ 2239 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2240 continue; 2241 } 2242 } 2243 } 2244 /* queue an asconf for this address add/delete */ 2245 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2246 stcb->asoc.asconf_supported == 1) { 2247 /* queue an asconf for this addr */ 2248 status = sctp_asconf_queue_add(stcb, ifa, type); 2249 /* 2250 * if queued ok, and in the open state, update the 2251 * count of queued params. If in the non-open 2252 * state, these get sent when the assoc goes open. 2253 */ 2254 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2255 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2256 if (status >= 0) { 2257 num_queued++; 2258 } 2259 } 2260 } 2261 } 2262 /* 2263 * If we have queued params in the open state, send out an ASCONF. 2264 */ 2265 if (num_queued > 0) { 2266 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2267 } 2268 } 2269 2270 void 2271 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2272 { 2273 struct sctp_asconf_iterator *asc; 2274 struct sctp_ifa *ifa; 2275 struct sctp_laddr *l, *nl; 2276 2277 asc = (struct sctp_asconf_iterator *)ptr; 2278 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2279 ifa = l->ifa; 2280 if (l->action == SCTP_ADD_IP_ADDRESS) { 2281 /* Clear the defer use flag */ 2282 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2283 } 2284 sctp_free_ifa(ifa); 2285 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2286 SCTP_DECR_LADDR_COUNT(); 2287 } 2288 SCTP_FREE(asc, SCTP_M_ASC_IT); 2289 } 2290 2291 /* 2292 * sa is the sockaddr to ask the peer to set primary to. 2293 * returns: 0 = completed, -1 = error 2294 */ 2295 int32_t 2296 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2297 { 2298 uint32_t vrf_id; 2299 struct sctp_ifa *ifa; 2300 2301 /* find the ifa for the desired set primary */ 2302 vrf_id = stcb->asoc.vrf_id; 2303 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2304 if (ifa == NULL) { 2305 /* Invalid address */ 2306 return (-1); 2307 } 2308 2309 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2310 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2311 /* set primary queuing succeeded */ 2312 SCTPDBG(SCTP_DEBUG_ASCONF1, 2313 "set_primary_ip_address_sa: queued on tcb=%p, ", 2314 (void *)stcb); 2315 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2316 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2317 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2318 #ifdef SCTP_TIMER_BASED_ASCONF 2319 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2320 stcb->sctp_ep, stcb, 2321 stcb->asoc.primary_destination); 2322 #else 2323 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2324 #endif 2325 } 2326 } else { 2327 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2328 (void *)stcb); 2329 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2330 return (-1); 2331 } 2332 return (0); 2333 } 2334 2335 int 2336 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2337 { 2338 struct sctp_tmit_chunk *chk, *nchk; 2339 unsigned int offset, asconf_limit; 2340 struct sctp_asconf_chunk *acp; 2341 struct sctp_asconf_paramhdr *aph; 2342 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2343 struct sctp_paramhdr *ph; 2344 int add_cnt, del_cnt; 2345 uint16_t last_param_type; 2346 2347 add_cnt = del_cnt = 0; 2348 last_param_type = 0; 2349 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2350 if (chk->data == NULL) { 2351 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2352 continue; 2353 } 2354 offset = 0; 2355 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2356 offset += sizeof(struct sctp_asconf_chunk); 2357 asconf_limit = ntohs(acp->ch.chunk_length); 2358 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2359 if (ph == NULL) { 2360 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2361 continue; 2362 } 2363 offset += ntohs(ph->param_length); 2364 2365 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2366 if (aph == NULL) { 2367 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2368 continue; 2369 } 2370 while (aph != NULL) { 2371 unsigned int param_length, param_type; 2372 2373 param_type = ntohs(aph->ph.param_type); 2374 param_length = ntohs(aph->ph.param_length); 2375 if (offset + param_length > asconf_limit) { 2376 /* parameter goes beyond end of chunk! */ 2377 break; 2378 } 2379 if (param_length > sizeof(aparam_buf)) { 2380 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2381 break; 2382 } 2383 if (param_length <= sizeof(struct sctp_paramhdr)) { 2384 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2385 break; 2386 } 2387 2388 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2389 if (aph == NULL) { 2390 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2391 break; 2392 } 2393 2394 ph = (struct sctp_paramhdr *)(aph + 1); 2395 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2396 switch (param_type) { 2397 case SCTP_ADD_IP_ADDRESS: 2398 add_cnt++; 2399 break; 2400 case SCTP_DEL_IP_ADDRESS: 2401 del_cnt++; 2402 break; 2403 default: 2404 break; 2405 } 2406 last_param_type = param_type; 2407 } 2408 2409 offset += SCTP_SIZE32(param_length); 2410 if (offset >= asconf_limit) { 2411 /* no more data in the mbuf chain */ 2412 break; 2413 } 2414 /* get pointer to next asconf param */ 2415 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2416 } 2417 } 2418 2419 /* 2420 * we want to find the sequences which consist of ADD -> DEL -> ADD 2421 * or DEL -> ADD 2422 */ 2423 if (add_cnt > del_cnt || 2424 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2425 return (1); 2426 } 2427 return (0); 2428 } 2429 2430 static struct sockaddr * 2431 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2432 { 2433 struct sctp_vrf *vrf = NULL; 2434 struct sctp_ifn *sctp_ifn; 2435 struct sctp_ifa *sctp_ifa; 2436 2437 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2438 SCTP_IPI_ADDR_RLOCK(); 2439 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2440 if (vrf == NULL) { 2441 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2442 SCTP_IPI_ADDR_RUNLOCK(); 2443 return (NULL); 2444 } 2445 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2446 if (stcb->asoc.scope.loopback_scope == 0 && 2447 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2448 /* Skip if loopback_scope not set */ 2449 continue; 2450 } 2451 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2452 switch (sctp_ifa->address.sa.sa_family) { 2453 #ifdef INET 2454 case AF_INET: 2455 if (stcb->asoc.scope.ipv4_addr_legal) { 2456 struct sockaddr_in *sin; 2457 2458 sin = &sctp_ifa->address.sin; 2459 if (sin->sin_addr.s_addr == 0) { 2460 /* skip unspecifed addresses */ 2461 continue; 2462 } 2463 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2464 &sin->sin_addr) != 0) { 2465 continue; 2466 } 2467 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2468 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2469 continue; 2470 2471 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2472 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2473 continue; 2474 /* 2475 * found a valid local v4 address to 2476 * use 2477 */ 2478 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2479 SCTP_IPI_ADDR_RUNLOCK(); 2480 return (&sctp_ifa->address.sa); 2481 } 2482 break; 2483 #endif 2484 #ifdef INET6 2485 case AF_INET6: 2486 if (stcb->asoc.scope.ipv6_addr_legal) { 2487 struct sockaddr_in6 *sin6; 2488 2489 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2490 continue; 2491 } 2492 2493 sin6 = &sctp_ifa->address.sin6; 2494 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2495 /* 2496 * we skip unspecifed 2497 * addresses 2498 */ 2499 continue; 2500 } 2501 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2502 &sin6->sin6_addr) != 0) { 2503 continue; 2504 } 2505 if (stcb->asoc.scope.local_scope == 0 && 2506 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2507 continue; 2508 if (stcb->asoc.scope.site_scope == 0 && 2509 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2510 continue; 2511 2512 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2513 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2514 continue; 2515 /* 2516 * found a valid local v6 address to 2517 * use 2518 */ 2519 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2520 SCTP_IPI_ADDR_RUNLOCK(); 2521 return (&sctp_ifa->address.sa); 2522 } 2523 break; 2524 #endif 2525 default: 2526 break; 2527 } 2528 } 2529 } 2530 /* no valid addresses found */ 2531 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2532 SCTP_IPI_ADDR_RUNLOCK(); 2533 return (NULL); 2534 } 2535 2536 static struct sockaddr * 2537 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2538 { 2539 struct sctp_laddr *laddr; 2540 2541 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2542 if (laddr->ifa == NULL) { 2543 continue; 2544 } 2545 /* is the address restricted ? */ 2546 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2547 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2548 continue; 2549 2550 /* found a valid local address to use */ 2551 return (&laddr->ifa->address.sa); 2552 } 2553 /* no valid addresses found */ 2554 return (NULL); 2555 } 2556 2557 /* 2558 * builds an ASCONF chunk from queued ASCONF params. 2559 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2560 */ 2561 struct mbuf * 2562 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2563 { 2564 struct mbuf *m_asconf, *m_asconf_chk; 2565 struct sctp_asconf_addr *aa; 2566 struct sctp_asconf_chunk *acp; 2567 struct sctp_asconf_paramhdr *aph; 2568 struct sctp_asconf_addr_param *aap; 2569 uint32_t p_length; 2570 uint32_t correlation_id = 1; /* 0 is reserved... */ 2571 caddr_t ptr, lookup_ptr; 2572 uint8_t lookup_used = 0; 2573 2574 /* are there any asconf params to send? */ 2575 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2576 if (aa->sent == 0) 2577 break; 2578 } 2579 if (aa == NULL) 2580 return (NULL); 2581 2582 /* 2583 * get a chunk header mbuf and a cluster for the asconf params since 2584 * it's simpler to fill in the asconf chunk header lookup address on 2585 * the fly 2586 */ 2587 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2588 if (m_asconf_chk == NULL) { 2589 /* no mbuf's */ 2590 SCTPDBG(SCTP_DEBUG_ASCONF1, 2591 "compose_asconf: couldn't get chunk mbuf!\n"); 2592 return (NULL); 2593 } 2594 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2595 if (m_asconf == NULL) { 2596 /* no mbuf's */ 2597 SCTPDBG(SCTP_DEBUG_ASCONF1, 2598 "compose_asconf: couldn't get mbuf!\n"); 2599 sctp_m_freem(m_asconf_chk); 2600 return (NULL); 2601 } 2602 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2603 SCTP_BUF_LEN(m_asconf) = 0; 2604 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2605 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2606 /* save pointers to lookup address and asconf params */ 2607 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2608 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2609 2610 /* fill in chunk header info */ 2611 acp->ch.chunk_type = SCTP_ASCONF; 2612 acp->ch.chunk_flags = 0; 2613 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2614 stcb->asoc.asconf_seq_out++; 2615 2616 /* add parameters... up to smallest MTU allowed */ 2617 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2618 if (aa->sent) 2619 continue; 2620 /* get the parameter length */ 2621 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2622 /* will it fit in current chunk? */ 2623 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2624 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2625 /* won't fit, so we're done with this chunk */ 2626 break; 2627 } 2628 /* assign (and store) a correlation id */ 2629 aa->ap.aph.correlation_id = correlation_id++; 2630 2631 /* 2632 * fill in address if we're doing a delete this is a simple 2633 * way for us to fill in the correlation address, which 2634 * should only be used by the peer if we're deleting our 2635 * source address and adding a new address (e.g. renumbering 2636 * case) 2637 */ 2638 if (lookup_used == 0 && 2639 (aa->special_del == 0) && 2640 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2641 struct sctp_ipv6addr_param *lookup; 2642 uint16_t p_size, addr_size; 2643 2644 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2645 lookup->ph.param_type = 2646 htons(aa->ap.addrp.ph.param_type); 2647 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2648 /* copy IPv6 address */ 2649 p_size = sizeof(struct sctp_ipv6addr_param); 2650 addr_size = sizeof(struct in6_addr); 2651 } else { 2652 /* copy IPv4 address */ 2653 p_size = sizeof(struct sctp_ipv4addr_param); 2654 addr_size = sizeof(struct in_addr); 2655 } 2656 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2657 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2658 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2659 lookup_used = 1; 2660 } 2661 /* copy into current space */ 2662 memcpy(ptr, &aa->ap, p_length); 2663 2664 /* network elements and update lengths */ 2665 aph = (struct sctp_asconf_paramhdr *)ptr; 2666 aap = (struct sctp_asconf_addr_param *)ptr; 2667 /* correlation_id is transparent to peer, no htonl needed */ 2668 aph->ph.param_type = htons(aph->ph.param_type); 2669 aph->ph.param_length = htons(aph->ph.param_length); 2670 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2671 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2672 2673 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2674 ptr += SCTP_SIZE32(p_length); 2675 2676 /* 2677 * these params are removed off the pending list upon 2678 * getting an ASCONF-ACK back from the peer, just set flag 2679 */ 2680 aa->sent = 1; 2681 } 2682 /* check to see if the lookup addr has been populated yet */ 2683 if (lookup_used == 0) { 2684 /* NOTE: if the address param is optional, can skip this... */ 2685 /* add any valid (existing) address... */ 2686 struct sctp_ipv6addr_param *lookup; 2687 uint16_t p_size, addr_size; 2688 struct sockaddr *found_addr; 2689 caddr_t addr_ptr; 2690 2691 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2692 found_addr = sctp_find_valid_localaddr(stcb, 2693 addr_locked); 2694 else 2695 found_addr = sctp_find_valid_localaddr_ep(stcb); 2696 2697 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2698 if (found_addr != NULL) { 2699 switch (found_addr->sa_family) { 2700 #ifdef INET6 2701 case AF_INET6: 2702 /* copy IPv6 address */ 2703 lookup->ph.param_type = 2704 htons(SCTP_IPV6_ADDRESS); 2705 p_size = sizeof(struct sctp_ipv6addr_param); 2706 addr_size = sizeof(struct in6_addr); 2707 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2708 found_addr)->sin6_addr; 2709 break; 2710 #endif 2711 #ifdef INET 2712 case AF_INET: 2713 /* copy IPv4 address */ 2714 lookup->ph.param_type = 2715 htons(SCTP_IPV4_ADDRESS); 2716 p_size = sizeof(struct sctp_ipv4addr_param); 2717 addr_size = sizeof(struct in_addr); 2718 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2719 found_addr)->sin_addr; 2720 break; 2721 #endif 2722 default: 2723 p_size = 0; 2724 addr_size = 0; 2725 addr_ptr = NULL; 2726 break; 2727 } 2728 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2729 memcpy(lookup->addr, addr_ptr, addr_size); 2730 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2731 } else { 2732 /* uh oh... don't have any address?? */ 2733 SCTPDBG(SCTP_DEBUG_ASCONF1, 2734 "compose_asconf: no lookup addr!\n"); 2735 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2736 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2737 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2738 memset(lookup->addr, 0, sizeof(struct in_addr)); 2739 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2740 } 2741 } 2742 /* chain it all together */ 2743 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2744 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2745 acp->ch.chunk_length = htons(*retlen); 2746 2747 return (m_asconf_chk); 2748 } 2749 2750 /* 2751 * section to handle address changes before an association is up eg. changes 2752 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2753 */ 2754 2755 /* 2756 * processes the (local) addresses in the INIT-ACK chunk 2757 */ 2758 static void 2759 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2760 unsigned int offset, unsigned int length) 2761 { 2762 struct sctp_paramhdr tmp_param, *ph; 2763 uint16_t plen, ptype; 2764 struct sctp_ifa *sctp_ifa; 2765 union sctp_sockstore store; 2766 #ifdef INET6 2767 struct sctp_ipv6addr_param addr6_store; 2768 #endif 2769 #ifdef INET 2770 struct sctp_ipv4addr_param addr4_store; 2771 #endif 2772 2773 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2774 if (stcb == NULL) /* Un-needed check for SA */ 2775 return; 2776 2777 /* convert to upper bound */ 2778 length += offset; 2779 2780 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2781 return; 2782 } 2783 /* go through the addresses in the init-ack */ 2784 ph = (struct sctp_paramhdr *) 2785 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2786 (uint8_t *)&tmp_param); 2787 while (ph != NULL) { 2788 ptype = ntohs(ph->param_type); 2789 plen = ntohs(ph->param_length); 2790 switch (ptype) { 2791 #ifdef INET6 2792 case SCTP_IPV6_ADDRESS: 2793 { 2794 struct sctp_ipv6addr_param *a6p; 2795 2796 /* get the entire IPv6 address param */ 2797 a6p = (struct sctp_ipv6addr_param *) 2798 sctp_m_getptr(m, offset, 2799 sizeof(struct sctp_ipv6addr_param), 2800 (uint8_t *)&addr6_store); 2801 if (plen != sizeof(struct sctp_ipv6addr_param) || 2802 a6p == NULL) { 2803 return; 2804 } 2805 memset(&store, 0, sizeof(union sctp_sockstore)); 2806 store.sin6.sin6_family = AF_INET6; 2807 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2808 store.sin6.sin6_port = stcb->rport; 2809 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2810 break; 2811 } 2812 #endif 2813 #ifdef INET 2814 case SCTP_IPV4_ADDRESS: 2815 { 2816 struct sctp_ipv4addr_param *a4p; 2817 2818 /* get the entire IPv4 address param */ 2819 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2820 sizeof(struct sctp_ipv4addr_param), 2821 (uint8_t *)&addr4_store); 2822 if (plen != sizeof(struct sctp_ipv4addr_param) || 2823 a4p == NULL) { 2824 return; 2825 } 2826 memset(&store, 0, sizeof(union sctp_sockstore)); 2827 store.sin.sin_family = AF_INET; 2828 store.sin.sin_len = sizeof(struct sockaddr_in); 2829 store.sin.sin_port = stcb->rport; 2830 store.sin.sin_addr.s_addr = a4p->addr; 2831 break; 2832 } 2833 #endif 2834 default: 2835 goto next_addr; 2836 } 2837 2838 /* see if this address really (still) exists */ 2839 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2840 SCTP_ADDR_NOT_LOCKED); 2841 if (sctp_ifa == NULL) { 2842 /* address doesn't exist anymore */ 2843 int status; 2844 2845 /* are ASCONFs allowed ? */ 2846 if ((sctp_is_feature_on(stcb->sctp_ep, 2847 SCTP_PCB_FLAGS_DO_ASCONF)) && 2848 stcb->asoc.asconf_supported) { 2849 /* queue an ASCONF DEL_IP_ADDRESS */ 2850 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2851 /* 2852 * if queued ok, and in correct state, send 2853 * out the ASCONF. 2854 */ 2855 if (status == 0 && 2856 SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) { 2857 #ifdef SCTP_TIMER_BASED_ASCONF 2858 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2859 stcb->sctp_ep, stcb, 2860 stcb->asoc.primary_destination); 2861 #else 2862 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2863 #endif 2864 } 2865 } 2866 } 2867 2868 next_addr: 2869 /* 2870 * Sanity check: Make sure the length isn't 0, otherwise 2871 * we'll be stuck in this loop for a long time... 2872 */ 2873 if (SCTP_SIZE32(plen) == 0) { 2874 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2875 plen, ptype); 2876 return; 2877 } 2878 /* get next parameter */ 2879 offset += SCTP_SIZE32(plen); 2880 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2881 return; 2882 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2883 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2884 } /* while */ 2885 } 2886 2887 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2888 /* 2889 * checks to see if a specific address is in the initack address list returns 2890 * 1 if found, 0 if not 2891 */ 2892 static uint32_t 2893 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2894 { 2895 struct sctp_paramhdr tmp_param, *ph; 2896 uint16_t plen, ptype; 2897 #ifdef INET 2898 struct sockaddr_in *sin; 2899 struct sctp_ipv4addr_param *a4p; 2900 struct sctp_ipv6addr_param addr4_store; 2901 #endif 2902 #ifdef INET6 2903 struct sockaddr_in6 *sin6; 2904 struct sctp_ipv6addr_param *a6p; 2905 struct sctp_ipv6addr_param addr6_store; 2906 struct sockaddr_in6 sin6_tmp; 2907 #endif 2908 2909 switch (sa->sa_family) { 2910 #ifdef INET 2911 case AF_INET: 2912 break; 2913 #endif 2914 #ifdef INET6 2915 case AF_INET6: 2916 break; 2917 #endif 2918 default: 2919 return (0); 2920 } 2921 2922 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2923 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2924 /* convert to upper bound */ 2925 length += offset; 2926 2927 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2928 SCTPDBG(SCTP_DEBUG_ASCONF1, 2929 "find_initack_addr: invalid offset?\n"); 2930 return (0); 2931 } 2932 /* go through the addresses in the init-ack */ 2933 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2934 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2935 while (ph != NULL) { 2936 ptype = ntohs(ph->param_type); 2937 plen = ntohs(ph->param_length); 2938 switch (ptype) { 2939 #ifdef INET6 2940 case SCTP_IPV6_ADDRESS: 2941 if (sa->sa_family == AF_INET6) { 2942 /* get the entire IPv6 address param */ 2943 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2944 break; 2945 } 2946 /* get the entire IPv6 address param */ 2947 a6p = (struct sctp_ipv6addr_param *) 2948 sctp_m_getptr(m, offset, 2949 sizeof(struct sctp_ipv6addr_param), 2950 (uint8_t *)&addr6_store); 2951 if (a6p == NULL) { 2952 return (0); 2953 } 2954 sin6 = (struct sockaddr_in6 *)sa; 2955 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2956 /* create a copy and clear scope */ 2957 memcpy(&sin6_tmp, sin6, 2958 sizeof(struct sockaddr_in6)); 2959 sin6 = &sin6_tmp; 2960 in6_clearscope(&sin6->sin6_addr); 2961 } 2962 if (memcmp(&sin6->sin6_addr, a6p->addr, 2963 sizeof(struct in6_addr)) == 0) { 2964 /* found it */ 2965 return (1); 2966 } 2967 } 2968 break; 2969 #endif /* INET6 */ 2970 #ifdef INET 2971 case SCTP_IPV4_ADDRESS: 2972 if (sa->sa_family == AF_INET) { 2973 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2974 break; 2975 } 2976 /* get the entire IPv4 address param */ 2977 a4p = (struct sctp_ipv4addr_param *) 2978 sctp_m_getptr(m, offset, 2979 sizeof(struct sctp_ipv4addr_param), 2980 (uint8_t *)&addr4_store); 2981 if (a4p == NULL) { 2982 return (0); 2983 } 2984 sin = (struct sockaddr_in *)sa; 2985 if (sin->sin_addr.s_addr == a4p->addr) { 2986 /* found it */ 2987 return (1); 2988 } 2989 } 2990 break; 2991 #endif 2992 default: 2993 break; 2994 } 2995 /* get next parameter */ 2996 offset += SCTP_SIZE32(plen); 2997 if (offset + sizeof(struct sctp_paramhdr) > length) { 2998 return (0); 2999 } 3000 ph = (struct sctp_paramhdr *) 3001 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3002 (uint8_t *)&tmp_param); 3003 } /* while */ 3004 /* not found! */ 3005 return (0); 3006 } 3007 3008 /* 3009 * makes sure that the current endpoint local addr list is consistent with 3010 * the new association (eg. subset bound, asconf allowed) adds addresses as 3011 * necessary 3012 */ 3013 static void 3014 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3015 int length, struct sockaddr *init_addr) 3016 { 3017 struct sctp_laddr *laddr; 3018 3019 /* go through the endpoint list */ 3020 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3021 /* be paranoid and validate the laddr */ 3022 if (laddr->ifa == NULL) { 3023 SCTPDBG(SCTP_DEBUG_ASCONF1, 3024 "check_addr_list_ep: laddr->ifa is NULL"); 3025 continue; 3026 } 3027 /* do i have it implicitly? */ 3028 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3029 continue; 3030 } 3031 /* check to see if in the init-ack */ 3032 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3033 /* try to add it */ 3034 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3035 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3036 } 3037 } 3038 } 3039 3040 /* 3041 * makes sure that the current kernel address list is consistent with the new 3042 * association (with all addrs bound) adds addresses as necessary 3043 */ 3044 static void 3045 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3046 int length, struct sockaddr *init_addr, 3047 uint16_t local_scope, uint16_t site_scope, 3048 uint16_t ipv4_scope, uint16_t loopback_scope) 3049 { 3050 struct sctp_vrf *vrf = NULL; 3051 struct sctp_ifn *sctp_ifn; 3052 struct sctp_ifa *sctp_ifa; 3053 uint32_t vrf_id; 3054 #ifdef INET 3055 struct sockaddr_in *sin; 3056 #endif 3057 #ifdef INET6 3058 struct sockaddr_in6 *sin6; 3059 #endif 3060 3061 if (stcb) { 3062 vrf_id = stcb->asoc.vrf_id; 3063 } else { 3064 return; 3065 } 3066 SCTP_IPI_ADDR_RLOCK(); 3067 vrf = sctp_find_vrf(vrf_id); 3068 if (vrf == NULL) { 3069 SCTP_IPI_ADDR_RUNLOCK(); 3070 return; 3071 } 3072 /* go through all our known interfaces */ 3073 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3074 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3075 /* skip loopback interface */ 3076 continue; 3077 } 3078 /* go through each interface address */ 3079 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3080 /* do i have it implicitly? */ 3081 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3082 continue; 3083 } 3084 switch (sctp_ifa->address.sa.sa_family) { 3085 #ifdef INET 3086 case AF_INET: 3087 sin = &sctp_ifa->address.sin; 3088 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3089 &sin->sin_addr) != 0) { 3090 continue; 3091 } 3092 if ((ipv4_scope == 0) && 3093 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3094 /* private address not in scope */ 3095 continue; 3096 } 3097 break; 3098 #endif 3099 #ifdef INET6 3100 case AF_INET6: 3101 sin6 = &sctp_ifa->address.sin6; 3102 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3103 &sin6->sin6_addr) != 0) { 3104 continue; 3105 } 3106 if ((local_scope == 0) && 3107 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3108 continue; 3109 } 3110 if ((site_scope == 0) && 3111 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3112 continue; 3113 } 3114 break; 3115 #endif 3116 default: 3117 break; 3118 } 3119 /* check to see if in the init-ack */ 3120 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3121 /* try to add it */ 3122 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3123 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3124 SCTP_ADDR_LOCKED); 3125 } 3126 } /* end foreach ifa */ 3127 } /* end foreach ifn */ 3128 SCTP_IPI_ADDR_RUNLOCK(); 3129 } 3130 3131 /* 3132 * validates an init-ack chunk (from a cookie-echo) with current addresses 3133 * adds addresses from the init-ack into our local address list, if needed 3134 * queues asconf adds/deletes addresses as needed and makes appropriate list 3135 * changes for source address selection m, offset: points to the start of the 3136 * address list in an init-ack chunk length: total length of the address 3137 * params only init_addr: address where my INIT-ACK was sent from 3138 */ 3139 void 3140 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3141 int length, struct sockaddr *init_addr, 3142 uint16_t local_scope, uint16_t site_scope, 3143 uint16_t ipv4_scope, uint16_t loopback_scope) 3144 { 3145 /* process the local addresses in the initack */ 3146 sctp_process_initack_addresses(stcb, m, offset, length); 3147 3148 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3149 /* bound all case */ 3150 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3151 local_scope, site_scope, ipv4_scope, loopback_scope); 3152 } else { 3153 /* subset bound case */ 3154 if (sctp_is_feature_on(stcb->sctp_ep, 3155 SCTP_PCB_FLAGS_DO_ASCONF)) { 3156 /* asconf's allowed */ 3157 sctp_check_address_list_ep(stcb, m, offset, length, 3158 init_addr); 3159 } 3160 /* else, no asconfs allowed, so what we sent is what we get */ 3161 } 3162 } 3163 3164 /* 3165 * sctp_bindx() support 3166 */ 3167 uint32_t 3168 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3169 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3170 { 3171 struct sctp_ifa *ifa; 3172 struct sctp_laddr *laddr, *nladdr; 3173 3174 if (sa->sa_len == 0) { 3175 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3176 return (EINVAL); 3177 } 3178 if (sctp_ifap) { 3179 ifa = sctp_ifap; 3180 } else if (type == SCTP_ADD_IP_ADDRESS) { 3181 /* For an add the address MUST be on the system */ 3182 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3183 } else if (type == SCTP_DEL_IP_ADDRESS) { 3184 /* For a delete we need to find it in the inp */ 3185 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3186 } else { 3187 ifa = NULL; 3188 } 3189 if (ifa != NULL) { 3190 if (type == SCTP_ADD_IP_ADDRESS) { 3191 sctp_add_local_addr_ep(inp, ifa, type); 3192 } else if (type == SCTP_DEL_IP_ADDRESS) { 3193 if (inp->laddr_count < 2) { 3194 /* can't delete the last local address */ 3195 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3196 return (EINVAL); 3197 } 3198 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3199 sctp_nxt_addr) { 3200 if (ifa == laddr->ifa) { 3201 /* Mark in the delete */ 3202 laddr->action = type; 3203 } 3204 } 3205 } 3206 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3207 /* 3208 * There is no need to start the iterator if the inp 3209 * has no associations. 3210 */ 3211 if (type == SCTP_DEL_IP_ADDRESS) { 3212 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3213 if (laddr->ifa == ifa) { 3214 sctp_del_local_addr_ep(inp, ifa); 3215 } 3216 } 3217 } 3218 } else { 3219 struct sctp_asconf_iterator *asc; 3220 struct sctp_laddr *wi; 3221 int ret; 3222 3223 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3224 sizeof(struct sctp_asconf_iterator), 3225 SCTP_M_ASC_IT); 3226 if (asc == NULL) { 3227 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3228 return (ENOMEM); 3229 } 3230 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3231 if (wi == NULL) { 3232 SCTP_FREE(asc, SCTP_M_ASC_IT); 3233 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3234 return (ENOMEM); 3235 } 3236 LIST_INIT(&asc->list_of_work); 3237 asc->cnt = 1; 3238 SCTP_INCR_LADDR_COUNT(); 3239 wi->ifa = ifa; 3240 wi->action = type; 3241 atomic_add_int(&ifa->refcount, 1); 3242 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3243 ret = sctp_initiate_iterator(sctp_asconf_iterator_ep, 3244 sctp_asconf_iterator_stcb, 3245 sctp_asconf_iterator_ep_end, 3246 SCTP_PCB_ANY_FLAGS, 3247 SCTP_PCB_ANY_FEATURES, 3248 SCTP_ASOC_ANY_STATE, 3249 (void *)asc, 0, 3250 sctp_asconf_iterator_end, inp, 0); 3251 if (ret) { 3252 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n"); 3253 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT); 3254 sctp_asconf_iterator_end(asc, 0); 3255 return (EFAULT); 3256 } 3257 } 3258 return (0); 3259 } else { 3260 /* invalid address! */ 3261 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3262 return (EADDRNOTAVAIL); 3263 } 3264 } 3265 3266 void 3267 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3268 struct sctp_nets *net) 3269 { 3270 struct sctp_asconf_addr *aa; 3271 struct sctp_ifa *sctp_ifap; 3272 struct sctp_asconf_tag_param *vtag; 3273 #ifdef INET 3274 struct sockaddr_in *to; 3275 #endif 3276 #ifdef INET6 3277 struct sockaddr_in6 *to6; 3278 #endif 3279 if (net == NULL) { 3280 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3281 return; 3282 } 3283 if (stcb == NULL) { 3284 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3285 return; 3286 } 3287 /* 3288 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3289 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3290 */ 3291 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3292 SCTP_M_ASC_ADDR); 3293 if (aa == NULL) { 3294 /* didn't get memory */ 3295 SCTPDBG(SCTP_DEBUG_ASCONF1, 3296 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3297 return; 3298 } 3299 aa->special_del = 0; 3300 /* fill in asconf address parameter fields */ 3301 /* top level elements are "networked" during send */ 3302 aa->ifa = NULL; 3303 aa->sent = 0; /* clear sent flag */ 3304 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3305 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3306 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3307 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3308 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3309 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3310 3311 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3312 SCTP_M_ASC_ADDR); 3313 if (aa == NULL) { 3314 /* didn't get memory */ 3315 SCTPDBG(SCTP_DEBUG_ASCONF1, 3316 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3317 return; 3318 } 3319 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3320 /* fill in asconf address parameter fields */ 3321 /* ADD(0.0.0.0) */ 3322 switch (net->ro._l_addr.sa.sa_family) { 3323 #ifdef INET 3324 case AF_INET: 3325 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3326 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3327 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3328 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3329 /* No need to add an address, we are using 0.0.0.0 */ 3330 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3331 break; 3332 #endif 3333 #ifdef INET6 3334 case AF_INET6: 3335 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3336 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3337 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3338 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3339 /* No need to add an address, we are using 0.0.0.0 */ 3340 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3341 break; 3342 #endif 3343 default: 3344 SCTPDBG(SCTP_DEBUG_ASCONF1, 3345 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3346 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3347 return; 3348 } 3349 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3350 SCTP_M_ASC_ADDR); 3351 if (aa == NULL) { 3352 /* didn't get memory */ 3353 SCTPDBG(SCTP_DEBUG_ASCONF1, 3354 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3355 return; 3356 } 3357 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3358 /* fill in asconf address parameter fields */ 3359 /* ADD(0.0.0.0) */ 3360 switch (net->ro._l_addr.sa.sa_family) { 3361 #ifdef INET 3362 case AF_INET: 3363 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3364 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3365 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3366 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3367 /* No need to add an address, we are using 0.0.0.0 */ 3368 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3369 break; 3370 #endif 3371 #ifdef INET6 3372 case AF_INET6: 3373 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3374 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3375 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3376 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3377 /* No need to add an address, we are using 0.0.0.0 */ 3378 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3379 break; 3380 #endif 3381 default: 3382 SCTPDBG(SCTP_DEBUG_ASCONF1, 3383 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3384 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3385 return; 3386 } 3387 /* Now we must hunt the addresses and add all global addresses */ 3388 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3389 struct sctp_vrf *vrf = NULL; 3390 struct sctp_ifn *sctp_ifnp; 3391 uint32_t vrf_id; 3392 3393 vrf_id = stcb->sctp_ep->def_vrf_id; 3394 vrf = sctp_find_vrf(vrf_id); 3395 if (vrf == NULL) { 3396 goto skip_rest; 3397 } 3398 3399 SCTP_IPI_ADDR_RLOCK(); 3400 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3401 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3402 switch (sctp_ifap->address.sa.sa_family) { 3403 #ifdef INET 3404 case AF_INET: 3405 to = &sctp_ifap->address.sin; 3406 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3407 &to->sin_addr) != 0) { 3408 continue; 3409 } 3410 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3411 continue; 3412 } 3413 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3414 continue; 3415 } 3416 break; 3417 #endif 3418 #ifdef INET6 3419 case AF_INET6: 3420 to6 = &sctp_ifap->address.sin6; 3421 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3422 &to6->sin6_addr) != 0) { 3423 continue; 3424 } 3425 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3426 continue; 3427 } 3428 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3429 continue; 3430 } 3431 break; 3432 #endif 3433 default: 3434 continue; 3435 } 3436 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3437 } 3438 } 3439 SCTP_IPI_ADDR_RUNLOCK(); 3440 } else { 3441 struct sctp_laddr *laddr; 3442 3443 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3444 if (laddr->ifa == NULL) { 3445 continue; 3446 } 3447 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3448 /* 3449 * Address being deleted by the system, dont 3450 * list. 3451 */ 3452 continue; 3453 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3454 /* 3455 * Address being deleted on this ep don't 3456 * list. 3457 */ 3458 continue; 3459 } 3460 sctp_ifap = laddr->ifa; 3461 switch (sctp_ifap->address.sa.sa_family) { 3462 #ifdef INET 3463 case AF_INET: 3464 to = &sctp_ifap->address.sin; 3465 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3466 continue; 3467 } 3468 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3469 continue; 3470 } 3471 break; 3472 #endif 3473 #ifdef INET6 3474 case AF_INET6: 3475 to6 = &sctp_ifap->address.sin6; 3476 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3477 continue; 3478 } 3479 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3480 continue; 3481 } 3482 break; 3483 #endif 3484 default: 3485 continue; 3486 } 3487 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3488 } 3489 } 3490 skip_rest: 3491 /* Now we must send the asconf into the queue */ 3492 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3493 } 3494