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 * RFC 5061 56 * 57 * An ASCONF parameter queue exists per asoc which holds the pending address 58 * operations. Lists are updated upon receipt of ASCONF-ACK. 59 * 60 * A restricted_addrs list exists per assoc to hold local addresses that are 61 * not (yet) usable by the assoc as a source address. These addresses are 62 * either pending an ASCONF operation (and exist on the ASCONF parameter 63 * queue), or they are permanently restricted (the peer has returned an 64 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 65 * 66 * Deleted addresses are always immediately removed from the lists as they will 67 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 68 * only if allowed. 69 */ 70 71 /* 72 * ASCONF parameter processing. 73 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 74 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 75 * FIX: allocating this many mbufs on the fly is pretty inefficient... 76 */ 77 static struct mbuf * 78 sctp_asconf_success_response(uint32_t id) 79 { 80 struct mbuf *m_reply = NULL; 81 struct sctp_asconf_paramhdr *aph; 82 83 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 84 0, M_NOWAIT, 1, MT_DATA); 85 if (m_reply == NULL) { 86 SCTPDBG(SCTP_DEBUG_ASCONF1, 87 "asconf_success_response: couldn't get mbuf!\n"); 88 return (NULL); 89 } 90 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 91 aph->correlation_id = id; 92 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 93 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 94 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 95 aph->ph.param_length = htons(aph->ph.param_length); 96 97 return (m_reply); 98 } 99 100 static struct mbuf * 101 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv, 102 uint16_t tlv_length) 103 { 104 struct mbuf *m_reply = NULL; 105 struct sctp_asconf_paramhdr *aph; 106 struct sctp_error_cause *error; 107 uint32_t buf_len; 108 uint16_t i, param_length, cause_length, padding_length; 109 uint8_t *tlv; 110 111 if (error_tlv == NULL) { 112 tlv_length = 0; 113 } 114 cause_length = sizeof(struct sctp_error_cause) + tlv_length; 115 param_length = sizeof(struct sctp_asconf_paramhdr) + cause_length; 116 padding_length = tlv_length % 4; 117 if (padding_length != 0) { 118 padding_length = 4 - padding_length; 119 } 120 buf_len = param_length + padding_length; 121 if (buf_len > MLEN) { 122 SCTPDBG(SCTP_DEBUG_ASCONF1, 123 "asconf_error_response: tlv_length (%xh) too big\n", 124 tlv_length); 125 return (NULL); 126 } 127 m_reply = sctp_get_mbuf_for_msg(buf_len, 0, M_NOWAIT, 1, MT_DATA); 128 if (m_reply == NULL) { 129 SCTPDBG(SCTP_DEBUG_ASCONF1, 130 "asconf_error_response: couldn't get mbuf!\n"); 131 return (NULL); 132 } 133 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 134 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 135 aph->ph.param_length = htons(param_length); 136 aph->correlation_id = id; 137 error = (struct sctp_error_cause *)(aph + 1); 138 error->code = htons(cause); 139 error->length = htons(cause_length); 140 if (error_tlv != NULL) { 141 tlv = (uint8_t *)(error + 1); 142 memcpy(tlv, error_tlv, tlv_length); 143 for (i = 0; i < padding_length; i++) { 144 tlv[tlv_length + i] = 0; 145 } 146 } 147 SCTP_BUF_LEN(m_reply) = buf_len; 148 return (m_reply); 149 } 150 151 static struct mbuf * 152 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, 153 struct sctp_tcb *stcb, int send_hb, int response_required) 154 { 155 struct sctp_nets *net; 156 struct mbuf *m_reply = NULL; 157 union sctp_sockstore store; 158 struct sctp_paramhdr *ph; 159 uint16_t param_type, aparam_length; 160 #if defined(INET) || defined(INET6) 161 uint16_t param_length; 162 #endif 163 struct sockaddr *sa; 164 int zero_address = 0; 165 int bad_address = 0; 166 #ifdef INET 167 struct sockaddr_in *sin; 168 struct sctp_ipv4addr_param *v4addr; 169 #endif 170 #ifdef INET6 171 struct sockaddr_in6 *sin6; 172 struct sctp_ipv6addr_param *v6addr; 173 #endif 174 175 aparam_length = ntohs(aph->ph.param_length); 176 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 177 return (NULL); 178 } 179 ph = (struct sctp_paramhdr *)(aph + 1); 180 param_type = ntohs(ph->param_type); 181 #if defined(INET) || defined(INET6) 182 param_length = ntohs(ph->param_length); 183 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 184 return (NULL); 185 } 186 #endif 187 sa = &store.sa; 188 switch (param_type) { 189 #ifdef INET 190 case SCTP_IPV4_ADDRESS: 191 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 192 /* invalid param size */ 193 return (NULL); 194 } 195 v4addr = (struct sctp_ipv4addr_param *)ph; 196 sin = &store.sin; 197 memset(sin, 0, sizeof(*sin)); 198 sin->sin_family = AF_INET; 199 sin->sin_len = sizeof(struct sockaddr_in); 200 sin->sin_port = stcb->rport; 201 sin->sin_addr.s_addr = v4addr->addr; 202 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 203 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 204 bad_address = 1; 205 } 206 if (sin->sin_addr.s_addr == INADDR_ANY) 207 zero_address = 1; 208 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 209 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 210 break; 211 #endif 212 #ifdef INET6 213 case SCTP_IPV6_ADDRESS: 214 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 215 /* invalid param size */ 216 return (NULL); 217 } 218 v6addr = (struct sctp_ipv6addr_param *)ph; 219 sin6 = &store.sin6; 220 memset(sin6, 0, sizeof(*sin6)); 221 sin6->sin6_family = AF_INET6; 222 sin6->sin6_len = sizeof(struct sockaddr_in6); 223 sin6->sin6_port = stcb->rport; 224 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 225 sizeof(struct in6_addr)); 226 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 227 bad_address = 1; 228 } 229 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 230 zero_address = 1; 231 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 232 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 233 break; 234 #endif 235 default: 236 m_reply = sctp_asconf_error_response(aph->correlation_id, 237 SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph, 238 aparam_length); 239 return (m_reply); 240 } /* end switch */ 241 242 /* if 0.0.0.0/::0, add the source address instead */ 243 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 244 sa = src; 245 SCTPDBG(SCTP_DEBUG_ASCONF1, 246 "process_asconf_add_ip: using source addr "); 247 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 248 } 249 net = NULL; 250 /* add the address */ 251 if (bad_address) { 252 m_reply = sctp_asconf_error_response(aph->correlation_id, 253 SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph, 254 aparam_length); 255 } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port, 256 SCTP_DONOT_SETSCOPE, 257 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 258 SCTPDBG(SCTP_DEBUG_ASCONF1, 259 "process_asconf_add_ip: error adding address\n"); 260 m_reply = sctp_asconf_error_response(aph->correlation_id, 261 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *)aph, 262 aparam_length); 263 } else { 264 if (response_required) { 265 m_reply = 266 sctp_asconf_success_response(aph->correlation_id); 267 } 268 if (net != NULL) { 269 /* notify upper layer */ 270 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 271 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 272 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 273 stcb, net); 274 if (send_hb) { 275 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 276 } 277 } 278 } 279 return (m_reply); 280 } 281 282 static int 283 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 284 { 285 struct sctp_nets *src_net, *net, *nnet; 286 287 /* make sure the source address exists as a destination net */ 288 src_net = sctp_findnet(stcb, src); 289 if (src_net == NULL) { 290 /* not found */ 291 return (-1); 292 } 293 294 /* delete all destination addresses except the source */ 295 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 296 if (net != src_net) { 297 /* delete this address */ 298 SCTPDBG(SCTP_DEBUG_ASCONF1, 299 "asconf_del_remote_addrs_except: deleting "); 300 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 301 (struct sockaddr *)&net->ro._l_addr); 302 /* notify upper layer */ 303 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 304 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 305 sctp_remove_net(stcb, net); 306 } 307 } 308 return (0); 309 } 310 311 static struct mbuf * 312 sctp_process_asconf_delete_ip(struct sockaddr *src, 313 struct sctp_asconf_paramhdr *aph, 314 struct sctp_tcb *stcb, int response_required) 315 { 316 struct mbuf *m_reply = NULL; 317 union sctp_sockstore store; 318 struct sctp_paramhdr *ph; 319 uint16_t param_type, aparam_length; 320 #if defined(INET) || defined(INET6) 321 uint16_t param_length; 322 #endif 323 struct sockaddr *sa; 324 int zero_address = 0; 325 int result; 326 #ifdef INET 327 struct sockaddr_in *sin; 328 struct sctp_ipv4addr_param *v4addr; 329 #endif 330 #ifdef INET6 331 struct sockaddr_in6 *sin6; 332 struct sctp_ipv6addr_param *v6addr; 333 #endif 334 335 aparam_length = ntohs(aph->ph.param_length); 336 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 337 return (NULL); 338 } 339 ph = (struct sctp_paramhdr *)(aph + 1); 340 param_type = ntohs(ph->param_type); 341 #if defined(INET) || defined(INET6) 342 param_length = ntohs(ph->param_length); 343 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 344 return (NULL); 345 } 346 #endif 347 sa = &store.sa; 348 switch (param_type) { 349 #ifdef INET 350 case SCTP_IPV4_ADDRESS: 351 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 352 /* invalid param size */ 353 return (NULL); 354 } 355 v4addr = (struct sctp_ipv4addr_param *)ph; 356 sin = &store.sin; 357 memset(sin, 0, sizeof(*sin)); 358 sin->sin_family = AF_INET; 359 sin->sin_len = sizeof(struct sockaddr_in); 360 sin->sin_port = stcb->rport; 361 sin->sin_addr.s_addr = v4addr->addr; 362 if (sin->sin_addr.s_addr == INADDR_ANY) 363 zero_address = 1; 364 SCTPDBG(SCTP_DEBUG_ASCONF1, 365 "process_asconf_delete_ip: deleting "); 366 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 367 break; 368 #endif 369 #ifdef INET6 370 case SCTP_IPV6_ADDRESS: 371 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 372 /* invalid param size */ 373 return (NULL); 374 } 375 v6addr = (struct sctp_ipv6addr_param *)ph; 376 sin6 = &store.sin6; 377 memset(sin6, 0, sizeof(*sin6)); 378 sin6->sin6_family = AF_INET6; 379 sin6->sin6_len = sizeof(struct sockaddr_in6); 380 sin6->sin6_port = stcb->rport; 381 memcpy(&sin6->sin6_addr, v6addr->addr, 382 sizeof(struct in6_addr)); 383 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 384 zero_address = 1; 385 SCTPDBG(SCTP_DEBUG_ASCONF1, 386 "process_asconf_delete_ip: deleting "); 387 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 388 break; 389 #endif 390 default: 391 m_reply = sctp_asconf_error_response(aph->correlation_id, 392 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 393 aparam_length); 394 return (m_reply); 395 } 396 397 /* make sure the source address is not being deleted */ 398 if (sctp_cmpaddr(sa, src)) { 399 /* trying to delete the source address! */ 400 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 401 m_reply = sctp_asconf_error_response(aph->correlation_id, 402 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph, 403 aparam_length); 404 return (m_reply); 405 } 406 407 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 408 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 409 result = sctp_asconf_del_remote_addrs_except(stcb, src); 410 411 if (result) { 412 /* src address did not exist? */ 413 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 414 /* what error to reply with?? */ 415 m_reply = 416 sctp_asconf_error_response(aph->correlation_id, 417 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph, 418 aparam_length); 419 } else if (response_required) { 420 m_reply = 421 sctp_asconf_success_response(aph->correlation_id); 422 } 423 return (m_reply); 424 } 425 426 /* delete the address */ 427 result = sctp_del_remote_addr(stcb, sa); 428 /* 429 * note if result == -2, the address doesn't exist in the asoc but 430 * since it's being deleted anyways, we just ack the delete -- but 431 * this probably means something has already gone awry 432 */ 433 if (result == -1) { 434 /* only one address in the asoc */ 435 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 436 m_reply = sctp_asconf_error_response(aph->correlation_id, 437 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph, 438 aparam_length); 439 } else { 440 if (response_required) { 441 m_reply = sctp_asconf_success_response(aph->correlation_id); 442 } 443 /* notify upper layer */ 444 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 445 } 446 return (m_reply); 447 } 448 449 static struct mbuf * 450 sctp_process_asconf_set_primary(struct sockaddr *src, 451 struct sctp_asconf_paramhdr *aph, 452 struct sctp_tcb *stcb, int response_required) 453 { 454 struct mbuf *m_reply = NULL; 455 union sctp_sockstore store; 456 struct sctp_paramhdr *ph; 457 uint16_t param_type, aparam_length; 458 #if defined(INET) || defined(INET6) 459 uint16_t param_length; 460 #endif 461 struct sockaddr *sa; 462 int zero_address = 0; 463 #ifdef INET 464 struct sockaddr_in *sin; 465 struct sctp_ipv4addr_param *v4addr; 466 #endif 467 #ifdef INET6 468 struct sockaddr_in6 *sin6; 469 struct sctp_ipv6addr_param *v6addr; 470 #endif 471 472 aparam_length = ntohs(aph->ph.param_length); 473 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 474 return (NULL); 475 } 476 ph = (struct sctp_paramhdr *)(aph + 1); 477 param_type = ntohs(ph->param_type); 478 #if defined(INET) || defined(INET6) 479 param_length = ntohs(ph->param_length); 480 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 481 return (NULL); 482 } 483 #endif 484 sa = &store.sa; 485 switch (param_type) { 486 #ifdef INET 487 case SCTP_IPV4_ADDRESS: 488 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 489 /* invalid param size */ 490 return (NULL); 491 } 492 v4addr = (struct sctp_ipv4addr_param *)ph; 493 sin = &store.sin; 494 memset(sin, 0, sizeof(*sin)); 495 sin->sin_family = AF_INET; 496 sin->sin_len = sizeof(struct sockaddr_in); 497 sin->sin_addr.s_addr = v4addr->addr; 498 if (sin->sin_addr.s_addr == INADDR_ANY) 499 zero_address = 1; 500 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 501 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 502 break; 503 #endif 504 #ifdef INET6 505 case SCTP_IPV6_ADDRESS: 506 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 507 /* invalid param size */ 508 return (NULL); 509 } 510 v6addr = (struct sctp_ipv6addr_param *)ph; 511 sin6 = &store.sin6; 512 memset(sin6, 0, sizeof(*sin6)); 513 sin6->sin6_family = AF_INET6; 514 sin6->sin6_len = sizeof(struct sockaddr_in6); 515 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 516 sizeof(struct in6_addr)); 517 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 518 zero_address = 1; 519 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 520 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 521 break; 522 #endif 523 default: 524 m_reply = sctp_asconf_error_response(aph->correlation_id, 525 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 526 aparam_length); 527 return (m_reply); 528 } 529 530 /* if 0.0.0.0/::0, use the source address instead */ 531 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 532 sa = src; 533 SCTPDBG(SCTP_DEBUG_ASCONF1, 534 "process_asconf_set_primary: using source addr "); 535 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 536 } 537 /* set the primary address */ 538 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 539 SCTPDBG(SCTP_DEBUG_ASCONF1, 540 "process_asconf_set_primary: primary address set\n"); 541 /* notify upper layer */ 542 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 543 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 544 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 545 (stcb->asoc.alternate)) { 546 sctp_free_remote_addr(stcb->asoc.alternate); 547 stcb->asoc.alternate = NULL; 548 } 549 if (response_required) { 550 m_reply = sctp_asconf_success_response(aph->correlation_id); 551 } 552 /* 553 * Mobility adaptation. Ideally, when the reception of SET 554 * PRIMARY with DELETE IP ADDRESS of the previous primary 555 * destination, unacknowledged DATA are retransmitted 556 * immediately to the new primary destination for seamless 557 * handover. If the destination is UNCONFIRMED and marked to 558 * REQ_PRIM, The retransmission occur when reception of the 559 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 560 * sctp_input.c) Also, when change of the primary 561 * destination, it is better that all subsequent new DATA 562 * containing already queued DATA are transmitted to the new 563 * primary destination. (by micchie) 564 */ 565 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 566 SCTP_MOBILITY_BASE) || 567 sctp_is_mobility_feature_on(stcb->sctp_ep, 568 SCTP_MOBILITY_FASTHANDOFF)) && 569 sctp_is_mobility_feature_on(stcb->sctp_ep, 570 SCTP_MOBILITY_PRIM_DELETED) && 571 (stcb->asoc.primary_destination->dest_state & 572 SCTP_ADDR_UNCONFIRMED) == 0) { 573 574 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, 575 stcb->sctp_ep, stcb, NULL, 576 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1); 577 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 578 SCTP_MOBILITY_FASTHANDOFF)) { 579 sctp_assoc_immediate_retrans(stcb, 580 stcb->asoc.primary_destination); 581 } 582 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 583 SCTP_MOBILITY_BASE)) { 584 sctp_move_chunks_from_net(stcb, 585 stcb->asoc.deleted_primary); 586 } 587 sctp_delete_prim_timer(stcb->sctp_ep, stcb); 588 } 589 } else { 590 /* couldn't set the requested primary address! */ 591 SCTPDBG(SCTP_DEBUG_ASCONF1, 592 "process_asconf_set_primary: set primary failed!\n"); 593 /* must have been an invalid address, so report */ 594 m_reply = sctp_asconf_error_response(aph->correlation_id, 595 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 596 aparam_length); 597 } 598 599 return (m_reply); 600 } 601 602 /* 603 * handles an ASCONF chunk. 604 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 605 */ 606 void 607 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 608 struct sockaddr *src, 609 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 610 int first) 611 { 612 struct sctp_association *asoc; 613 uint32_t serial_num; 614 struct mbuf *n, *m_ack, *m_result, *m_tail; 615 struct sctp_asconf_ack_chunk *ack_cp; 616 struct sctp_asconf_paramhdr *aph; 617 struct sctp_ipv6addr_param *p_addr; 618 unsigned int asconf_limit, cnt; 619 int error = 0; /* did an error occur? */ 620 621 /* asconf param buffer */ 622 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 623 struct sctp_asconf_ack *ack, *ack_next; 624 625 /* verify minimum length */ 626 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 627 SCTPDBG(SCTP_DEBUG_ASCONF1, 628 "handle_asconf: chunk too small = %xh\n", 629 ntohs(cp->ch.chunk_length)); 630 return; 631 } 632 asoc = &stcb->asoc; 633 serial_num = ntohl(cp->serial_number); 634 635 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 636 /* got a duplicate ASCONF */ 637 SCTPDBG(SCTP_DEBUG_ASCONF1, 638 "handle_asconf: got duplicate serial number = %xh\n", 639 serial_num); 640 return; 641 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 642 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 643 serial_num, asoc->asconf_seq_in + 1); 644 return; 645 } 646 647 /* it's the expected "next" sequence number, so process it */ 648 asoc->asconf_seq_in = serial_num; /* update sequence */ 649 /* get length of all the param's in the ASCONF */ 650 asconf_limit = offset + ntohs(cp->ch.chunk_length); 651 SCTPDBG(SCTP_DEBUG_ASCONF1, 652 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 653 asconf_limit, serial_num); 654 655 if (first) { 656 /* delete old cache */ 657 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 658 659 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 660 if (ack->serial_number == serial_num) 661 break; 662 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 663 ack->serial_number, serial_num); 664 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 665 if (ack->data != NULL) { 666 sctp_m_freem(ack->data); 667 } 668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 669 } 670 } 671 672 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 673 M_NOWAIT, 1, MT_DATA); 674 if (m_ack == NULL) { 675 SCTPDBG(SCTP_DEBUG_ASCONF1, 676 "handle_asconf: couldn't get mbuf!\n"); 677 return; 678 } 679 m_tail = m_ack; /* current reply chain's tail */ 680 681 /* fill in ASCONF-ACK header */ 682 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 683 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 684 ack_cp->ch.chunk_flags = 0; 685 ack_cp->serial_number = htonl(serial_num); 686 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 687 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 688 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 689 690 /* skip the lookup address parameter */ 691 offset += sizeof(struct sctp_asconf_chunk); 692 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); 693 if (p_addr == NULL) { 694 SCTPDBG(SCTP_DEBUG_ASCONF1, 695 "handle_asconf: couldn't get lookup addr!\n"); 696 /* respond with a missing/invalid mandatory parameter error */ 697 sctp_m_freem(m_ack); 698 return; 699 } 700 /* skip lookup addr */ 701 offset += SCTP_SIZE32(ntohs(p_addr->ph.param_length)); 702 /* get pointer to first asconf param in ASCONF */ 703 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); 704 if (aph == NULL) { 705 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 706 goto send_reply; 707 } 708 /* process through all parameters */ 709 cnt = 0; 710 while (aph != NULL) { 711 unsigned int param_length, param_type; 712 713 param_type = ntohs(aph->ph.param_type); 714 param_length = ntohs(aph->ph.param_length); 715 if (offset + param_length > asconf_limit) { 716 /* parameter goes beyond end of chunk! */ 717 sctp_m_freem(m_ack); 718 return; 719 } 720 m_result = NULL; 721 722 if (param_length > sizeof(aparam_buf)) { 723 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 724 sctp_m_freem(m_ack); 725 return; 726 } 727 if (param_length <= sizeof(struct sctp_paramhdr)) { 728 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 729 sctp_m_freem(m_ack); 730 return; 731 } 732 /* get the entire parameter */ 733 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 734 if (aph == NULL) { 735 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 736 sctp_m_freem(m_ack); 737 return; 738 } 739 switch (param_type) { 740 case SCTP_ADD_IP_ADDRESS: 741 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 742 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 743 cnt++; 744 break; 745 case SCTP_DEL_IP_ADDRESS: 746 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 747 error); 748 break; 749 case SCTP_ERROR_CAUSE_IND: 750 /* not valid in an ASCONF chunk */ 751 break; 752 case SCTP_SET_PRIM_ADDR: 753 m_result = sctp_process_asconf_set_primary(src, aph, 754 stcb, error); 755 break; 756 case SCTP_NAT_VTAGS: 757 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 758 break; 759 case SCTP_SUCCESS_REPORT: 760 /* not valid in an ASCONF chunk */ 761 break; 762 case SCTP_ULP_ADAPTATION: 763 /* FIX */ 764 break; 765 default: 766 if ((param_type & 0x8000) == 0) { 767 /* Been told to STOP at this param */ 768 asconf_limit = offset; 769 /* 770 * FIX FIX - We need to call 771 * sctp_arethere_unrecognized_parameters() 772 * to get a operr and send it for any 773 * param's with the 0x4000 bit set OR do it 774 * here ourselves... note we still must STOP 775 * if the 0x8000 bit is clear. 776 */ 777 } 778 /* unknown/invalid param type */ 779 break; 780 } /* switch */ 781 782 /* add any (error) result to the reply mbuf chain */ 783 if (m_result != NULL) { 784 SCTP_BUF_NEXT(m_tail) = m_result; 785 m_tail = m_result; 786 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 787 /* set flag to force success reports */ 788 error = 1; 789 } 790 offset += SCTP_SIZE32(param_length); 791 /* update remaining ASCONF message length to process */ 792 if (offset >= asconf_limit) { 793 /* no more data in the mbuf chain */ 794 break; 795 } 796 /* get pointer to next asconf param */ 797 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 798 sizeof(struct sctp_asconf_paramhdr), 799 (uint8_t *)&aparam_buf); 800 if (aph == NULL) { 801 /* can't get an asconf paramhdr */ 802 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 803 /* FIX ME - add error here... */ 804 } 805 } 806 807 send_reply: 808 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 809 /* save the ASCONF-ACK reply */ 810 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 811 struct sctp_asconf_ack); 812 if (ack == NULL) { 813 sctp_m_freem(m_ack); 814 return; 815 } 816 ack->serial_number = serial_num; 817 ack->last_sent_to = NULL; 818 ack->data = m_ack; 819 ack->len = 0; 820 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 821 ack->len += SCTP_BUF_LEN(n); 822 } 823 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 824 825 /* see if last_control_chunk_from is set properly (use IP src addr) */ 826 if (stcb->asoc.last_control_chunk_from == NULL) { 827 /* 828 * this could happen if the source address was just newly 829 * added 830 */ 831 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 832 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 833 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 834 /* look up the from address */ 835 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 836 #ifdef SCTP_DEBUG 837 if (stcb->asoc.last_control_chunk_from == NULL) { 838 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 839 } 840 #endif 841 } 842 } 843 844 /* 845 * does the address match? returns 0 if not, 1 if so 846 */ 847 static uint32_t 848 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 849 { 850 switch (sa->sa_family) { 851 #ifdef INET6 852 case AF_INET6: 853 { 854 /* XXX scopeid */ 855 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 856 857 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 858 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 859 sizeof(struct in6_addr)) == 0)) { 860 return (1); 861 } 862 break; 863 } 864 #endif 865 #ifdef INET 866 case AF_INET: 867 { 868 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 869 870 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 871 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 872 sizeof(struct in_addr)) == 0)) { 873 return (1); 874 } 875 break; 876 } 877 #endif 878 default: 879 break; 880 } 881 return (0); 882 } 883 884 /* 885 * does the address match? returns 0 if not, 1 if so 886 */ 887 static uint32_t 888 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 889 { 890 #if defined(INET) || defined(INET6) 891 uint16_t param_type, param_length; 892 893 param_type = ntohs(ph->param_type); 894 param_length = ntohs(ph->param_length); 895 #endif 896 switch (sa->sa_family) { 897 #ifdef INET6 898 case AF_INET6: 899 { 900 /* XXX scopeid */ 901 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 902 struct sctp_ipv6addr_param *v6addr; 903 904 v6addr = (struct sctp_ipv6addr_param *)ph; 905 if ((param_type == SCTP_IPV6_ADDRESS) && 906 (param_length == sizeof(struct sctp_ipv6addr_param)) && 907 (memcmp(&v6addr->addr, &sin6->sin6_addr, 908 sizeof(struct in6_addr)) == 0)) { 909 return (1); 910 } 911 break; 912 } 913 #endif 914 #ifdef INET 915 case AF_INET: 916 { 917 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 918 struct sctp_ipv4addr_param *v4addr; 919 920 v4addr = (struct sctp_ipv4addr_param *)ph; 921 if ((param_type == SCTP_IPV4_ADDRESS) && 922 (param_length == sizeof(struct sctp_ipv4addr_param)) && 923 (memcmp(&v4addr->addr, &sin->sin_addr, 924 sizeof(struct in_addr)) == 0)) { 925 return (1); 926 } 927 break; 928 } 929 #endif 930 default: 931 break; 932 } 933 return (0); 934 } 935 936 /* 937 * Cleanup for non-responded/OP ERR'd ASCONF 938 */ 939 void 940 sctp_asconf_cleanup(struct sctp_tcb *stcb) 941 { 942 /* 943 * clear out any existing asconfs going out 944 */ 945 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, 946 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 947 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 948 /* remove the old ASCONF on our outbound queue */ 949 sctp_toss_old_asconf(stcb); 950 } 951 952 /* 953 * cleanup any cached source addresses that may be topologically 954 * incorrect after a new address has been added to this interface. 955 */ 956 static void 957 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 958 { 959 struct sctp_nets *net; 960 961 /* 962 * Ideally, we want to only clear cached routes and source addresses 963 * that are topologically incorrect. But since there is no easy way 964 * to know whether the newly added address on the ifn would cause a 965 * routing change (i.e. a new egress interface would be chosen) 966 * without doing a new routing lookup and source address selection, 967 * we will (for now) just flush any cached route using a different 968 * ifn (and cached source addrs) and let output re-choose them 969 * during the next send on that net. 970 */ 971 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 972 /* 973 * clear any cached route (and cached source address) if the 974 * route's interface is NOT the same as the address change. 975 * If it's the same interface, just clear the cached source 976 * address. 977 */ 978 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 979 ((ifn == NULL) || 980 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 981 /* clear any cached route */ 982 RO_NHFREE(&net->ro); 983 } 984 /* clear any cached source address */ 985 if (net->src_addr_selected) { 986 sctp_free_ifa(net->ro._s_addr); 987 net->ro._s_addr = NULL; 988 net->src_addr_selected = 0; 989 } 990 } 991 } 992 993 994 void 995 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 996 { 997 int error; 998 999 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 1000 return; 1001 } 1002 if (stcb->asoc.deleted_primary == NULL) { 1003 return; 1004 } 1005 1006 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 1007 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 1008 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1009 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 1010 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 1011 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 1012 stcb->asoc.deleted_primary, 1013 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1014 stcb->asoc.num_send_timers_up--; 1015 if (stcb->asoc.num_send_timers_up < 0) { 1016 stcb->asoc.num_send_timers_up = 0; 1017 } 1018 SCTP_TCB_LOCK_ASSERT(stcb); 1019 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1020 stcb->asoc.deleted_primary); 1021 if (error) { 1022 SCTP_INP_DECR_REF(stcb->sctp_ep); 1023 return; 1024 } 1025 SCTP_TCB_LOCK_ASSERT(stcb); 1026 #ifdef SCTP_AUDITING_ENABLED 1027 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1028 #endif 1029 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1030 if ((stcb->asoc.num_send_timers_up == 0) && 1031 (stcb->asoc.sent_queue_cnt > 0)) { 1032 struct sctp_tmit_chunk *chk; 1033 1034 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1035 if (chk->whoTo != NULL) { 1036 break; 1037 } 1038 } 1039 if (chk != NULL) { 1040 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); 1041 } 1042 } 1043 } 1044 return; 1045 } 1046 1047 static int 1048 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1049 1050 void 1051 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1052 { 1053 struct sctp_tmit_chunk *chk; 1054 1055 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1056 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1057 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4); 1058 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1059 net->error_count = 0; 1060 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1061 if (chk->whoTo == net) { 1062 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1063 chk->sent = SCTP_DATAGRAM_RESEND; 1064 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1065 sctp_flight_size_decrease(chk); 1066 sctp_total_flight_decrease(stcb, chk); 1067 net->marked_retrans++; 1068 stcb->asoc.marked_retrans++; 1069 } 1070 } 1071 } 1072 if (net->marked_retrans) { 1073 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1074 } 1075 } 1076 1077 static void 1078 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1079 { 1080 struct sctp_nets *net; 1081 int addrnum, changed; 1082 1083 /* 1084 * If number of local valid addresses is 1, the valid address is 1085 * probably newly added address. Several valid addresses in this 1086 * association. A source address may not be changed. Additionally, 1087 * they can be configured on a same interface as "alias" addresses. 1088 * (by micchie) 1089 */ 1090 addrnum = sctp_local_addr_count(stcb); 1091 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1092 addrnum); 1093 if (addrnum == 1) { 1094 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1095 /* clear any cached route and source address */ 1096 RO_NHFREE(&net->ro); 1097 if (net->src_addr_selected) { 1098 sctp_free_ifa(net->ro._s_addr); 1099 net->ro._s_addr = NULL; 1100 net->src_addr_selected = 0; 1101 } 1102 /* Retransmit unacknowledged DATA chunks immediately */ 1103 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1104 SCTP_MOBILITY_FASTHANDOFF)) { 1105 sctp_net_immediate_retrans(stcb, net); 1106 } 1107 /* also, SET PRIMARY is maybe already sent */ 1108 } 1109 return; 1110 } 1111 1112 /* Multiple local addresses exsist in the association. */ 1113 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1114 /* clear any cached route and source address */ 1115 RO_NHFREE(&net->ro); 1116 if (net->src_addr_selected) { 1117 sctp_free_ifa(net->ro._s_addr); 1118 net->ro._s_addr = NULL; 1119 net->src_addr_selected = 0; 1120 } 1121 /* 1122 * Check if the nexthop is corresponding to the new address. 1123 * If the new address is corresponding to the current 1124 * nexthop, the path will be changed. If the new address is 1125 * NOT corresponding to the current nexthop, the path will 1126 * not be changed. 1127 */ 1128 SCTP_RTALLOC((sctp_route_t *)&net->ro, 1129 stcb->sctp_ep->def_vrf_id, 1130 stcb->sctp_ep->fibnum); 1131 if (net->ro.ro_nh == NULL) 1132 continue; 1133 1134 changed = 0; 1135 switch (net->ro._l_addr.sa.sa_family) { 1136 #ifdef INET 1137 case AF_INET: 1138 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) { 1139 changed = 1; 1140 } 1141 break; 1142 #endif 1143 #ifdef INET6 1144 case AF_INET6: 1145 if (sctp_v6src_match_nexthop( 1146 &newifa->address.sin6, (sctp_route_t *)&net->ro)) { 1147 changed = 1; 1148 } 1149 break; 1150 #endif 1151 default: 1152 break; 1153 } 1154 /* 1155 * if the newly added address does not relate routing 1156 * information, we skip. 1157 */ 1158 if (changed == 0) 1159 continue; 1160 /* Retransmit unacknowledged DATA chunks immediately */ 1161 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1162 SCTP_MOBILITY_FASTHANDOFF)) { 1163 sctp_net_immediate_retrans(stcb, net); 1164 } 1165 /* Send SET PRIMARY for this new address */ 1166 if (net == stcb->asoc.primary_destination) { 1167 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1168 SCTP_SET_PRIM_ADDR); 1169 } 1170 } 1171 } 1172 1173 /* 1174 * process an ADD/DELETE IP ack from peer. 1175 * addr: corresponding sctp_ifa to the address being added/deleted. 1176 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1177 * flag: 1=success, 0=failure. 1178 */ 1179 static void 1180 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1181 { 1182 /* 1183 * do the necessary asoc list work- if we get a failure indication, 1184 * leave the address on the assoc's restricted list. If we get a 1185 * success indication, remove the address from the restricted list. 1186 */ 1187 /* 1188 * Note: this will only occur for ADD_IP_ADDRESS, since 1189 * DEL_IP_ADDRESS is never actually added to the list... 1190 */ 1191 if (flag) { 1192 /* success case, so remove from the restricted list */ 1193 sctp_del_local_addr_restricted(stcb, addr); 1194 1195 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1196 SCTP_MOBILITY_BASE) || 1197 sctp_is_mobility_feature_on(stcb->sctp_ep, 1198 SCTP_MOBILITY_FASTHANDOFF)) { 1199 sctp_path_check_and_react(stcb, addr); 1200 return; 1201 } 1202 /* clear any cached/topologically incorrect source addresses */ 1203 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1204 } 1205 /* else, leave it on the list */ 1206 } 1207 1208 /* 1209 * add an asconf add/delete/set primary IP address parameter to the queue. 1210 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1211 * returns 0 if queued, -1 if not queued/removed. 1212 * NOTE: if adding, but a delete for the same address is already scheduled 1213 * (and not yet sent out), simply remove it from queue. Same for deleting 1214 * an address already scheduled for add. If a duplicate operation is found, 1215 * ignore the new one. 1216 */ 1217 static int 1218 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1219 uint16_t type) 1220 { 1221 struct sctp_asconf_addr *aa, *aa_next; 1222 1223 /* make sure the request isn't already in the queue */ 1224 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1225 /* address match? */ 1226 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1227 continue; 1228 /* 1229 * is the request already in queue but not sent? pass the 1230 * request already sent in order to resolve the following 1231 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1232 * can't remove the ADD request already sent 3. arrival of 1233 * ADD 1234 */ 1235 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1236 return (-1); 1237 } 1238 /* is the negative request already in queue, and not sent */ 1239 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1240 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1241 /* add requested, delete already queued */ 1242 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1243 /* remove the ifa from the restricted list */ 1244 sctp_del_local_addr_restricted(stcb, ifa); 1245 /* free the asconf param */ 1246 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1247 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1248 return (-1); 1249 } 1250 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1251 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1252 /* delete requested, add already queued */ 1253 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1254 /* remove the aa->ifa from the restricted list */ 1255 sctp_del_local_addr_restricted(stcb, aa->ifa); 1256 /* free the asconf param */ 1257 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1258 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1259 return (-1); 1260 } 1261 } /* for each aa */ 1262 1263 /* adding new request to the queue */ 1264 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1265 SCTP_M_ASC_ADDR); 1266 if (aa == NULL) { 1267 /* didn't get memory */ 1268 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1269 return (-1); 1270 } 1271 aa->special_del = 0; 1272 /* fill in asconf address parameter fields */ 1273 /* top level elements are "networked" during send */ 1274 aa->ap.aph.ph.param_type = type; 1275 aa->ifa = ifa; 1276 atomic_add_int(&ifa->refcount, 1); 1277 /* correlation_id filled in during send routine later... */ 1278 switch (ifa->address.sa.sa_family) { 1279 #ifdef INET6 1280 case AF_INET6: 1281 { 1282 struct sockaddr_in6 *sin6; 1283 1284 sin6 = &ifa->address.sin6; 1285 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1286 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1287 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1288 sizeof(struct sctp_ipv6addr_param); 1289 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1290 sizeof(struct in6_addr)); 1291 break; 1292 } 1293 #endif 1294 #ifdef INET 1295 case AF_INET: 1296 { 1297 struct sockaddr_in *sin; 1298 1299 sin = &ifa->address.sin; 1300 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1301 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1302 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1303 sizeof(struct sctp_ipv4addr_param); 1304 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1305 sizeof(struct in_addr)); 1306 break; 1307 } 1308 #endif 1309 default: 1310 /* invalid family! */ 1311 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1312 sctp_free_ifa(ifa); 1313 return (-1); 1314 } 1315 aa->sent = 0; /* clear sent flag */ 1316 1317 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1318 #ifdef SCTP_DEBUG 1319 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1320 if (type == SCTP_ADD_IP_ADDRESS) { 1321 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1322 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1323 } else if (type == SCTP_DEL_IP_ADDRESS) { 1324 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1325 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1326 } else { 1327 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1328 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1329 } 1330 } 1331 #endif 1332 1333 return (0); 1334 } 1335 1336 1337 /* 1338 * add an asconf operation for the given ifa and type. 1339 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1340 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1341 * advisable. 1342 */ 1343 static int 1344 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1345 uint16_t type) 1346 { 1347 uint32_t status; 1348 int pending_delete_queued = 0; 1349 int last; 1350 1351 /* see if peer supports ASCONF */ 1352 if (stcb->asoc.asconf_supported == 0) { 1353 return (-1); 1354 } 1355 1356 /* 1357 * if this is deleting the last address from the assoc, mark it as 1358 * pending. 1359 */ 1360 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { 1361 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1362 last = (sctp_local_addr_count(stcb) == 0); 1363 } else { 1364 last = (sctp_local_addr_count(stcb) == 1); 1365 } 1366 if (last) { 1367 /* set the pending delete info only */ 1368 stcb->asoc.asconf_del_pending = 1; 1369 stcb->asoc.asconf_addr_del_pending = ifa; 1370 atomic_add_int(&ifa->refcount, 1); 1371 SCTPDBG(SCTP_DEBUG_ASCONF2, 1372 "asconf_queue_add: mark delete last address pending\n"); 1373 return (-1); 1374 } 1375 } 1376 1377 /* queue an asconf parameter */ 1378 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1379 1380 /* 1381 * if this is an add, and there is a delete also pending (i.e. the 1382 * last local address is being changed), queue the pending delete 1383 * too. 1384 */ 1385 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1386 /* queue in the pending delete */ 1387 if (sctp_asconf_queue_mgmt(stcb, 1388 stcb->asoc.asconf_addr_del_pending, 1389 SCTP_DEL_IP_ADDRESS) == 0) { 1390 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n"); 1391 pending_delete_queued = 1; 1392 /* clear out the pending delete info */ 1393 stcb->asoc.asconf_del_pending = 0; 1394 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1395 stcb->asoc.asconf_addr_del_pending = NULL; 1396 } 1397 } 1398 1399 if (pending_delete_queued) { 1400 struct sctp_nets *net; 1401 1402 /* 1403 * since we know that the only/last address is now being 1404 * changed in this case, reset the cwnd/rto on all nets to 1405 * start as a new address and path. Also clear the error 1406 * counts to give the assoc the best chance to complete the 1407 * address change. 1408 */ 1409 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1410 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1411 net); 1412 net->RTO = 0; 1413 net->error_count = 0; 1414 } 1415 stcb->asoc.overall_error_count = 0; 1416 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1417 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1418 stcb->asoc.overall_error_count, 1419 0, 1420 SCTP_FROM_SCTP_ASCONF, 1421 __LINE__); 1422 } 1423 1424 /* queue in an advisory set primary too */ 1425 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1426 /* let caller know we should send this out immediately */ 1427 status = 1; 1428 } 1429 return (status); 1430 } 1431 1432 /*- 1433 * add an asconf delete IP address parameter to the queue by sockaddr and 1434 * possibly with no sctp_ifa available. This is only called by the routine 1435 * that checks the addresses in an INIT-ACK against the current address list. 1436 * returns 0 if completed, non-zero if not completed. 1437 * NOTE: if an add is already scheduled (and not yet sent out), simply 1438 * remove it from queue. If a duplicate operation is found, ignore the 1439 * new one. 1440 */ 1441 static int 1442 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1443 { 1444 struct sctp_ifa *ifa; 1445 struct sctp_asconf_addr *aa, *aa_next; 1446 1447 if (stcb == NULL) { 1448 return (-1); 1449 } 1450 /* see if peer supports ASCONF */ 1451 if (stcb->asoc.asconf_supported == 0) { 1452 return (-1); 1453 } 1454 /* make sure the request isn't already in the queue */ 1455 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1456 /* address match? */ 1457 if (sctp_asconf_addr_match(aa, sa) == 0) 1458 continue; 1459 /* is the request already in queue (sent or not) */ 1460 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1461 return (-1); 1462 } 1463 /* is the negative request already in queue, and not sent */ 1464 if (aa->sent == 1) 1465 continue; 1466 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1467 /* add already queued, so remove existing entry */ 1468 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1469 sctp_del_local_addr_restricted(stcb, aa->ifa); 1470 /* free the entry */ 1471 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1472 return (-1); 1473 } 1474 } /* for each aa */ 1475 1476 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1477 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1478 1479 /* adding new request to the queue */ 1480 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1481 SCTP_M_ASC_ADDR); 1482 if (aa == NULL) { 1483 /* didn't get memory */ 1484 SCTPDBG(SCTP_DEBUG_ASCONF1, 1485 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1486 return (-1); 1487 } 1488 aa->special_del = 0; 1489 /* fill in asconf address parameter fields */ 1490 /* top level elements are "networked" during send */ 1491 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1492 aa->ifa = ifa; 1493 if (ifa) 1494 atomic_add_int(&ifa->refcount, 1); 1495 /* correlation_id filled in during send routine later... */ 1496 switch (sa->sa_family) { 1497 #ifdef INET6 1498 case AF_INET6: 1499 { 1500 /* IPv6 address */ 1501 struct sockaddr_in6 *sin6; 1502 1503 sin6 = (struct sockaddr_in6 *)sa; 1504 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1505 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1506 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1507 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1508 sizeof(struct in6_addr)); 1509 break; 1510 } 1511 #endif 1512 #ifdef INET 1513 case AF_INET: 1514 { 1515 /* IPv4 address */ 1516 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1517 1518 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1519 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1520 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1521 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1522 sizeof(struct in_addr)); 1523 break; 1524 } 1525 #endif 1526 default: 1527 /* invalid family! */ 1528 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1529 if (ifa) 1530 sctp_free_ifa(ifa); 1531 return (-1); 1532 } 1533 aa->sent = 0; /* clear sent flag */ 1534 1535 /* delete goes to the back of the queue */ 1536 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1537 1538 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1539 return (0); 1540 } 1541 1542 /* 1543 * find a specific asconf param on our "sent" queue 1544 */ 1545 static struct sctp_asconf_addr * 1546 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1547 { 1548 struct sctp_asconf_addr *aa; 1549 1550 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1551 if (aa->ap.aph.correlation_id == correlation_id && 1552 aa->sent == 1) { 1553 /* found it */ 1554 return (aa); 1555 } 1556 } 1557 /* didn't find it */ 1558 return (NULL); 1559 } 1560 1561 /* 1562 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1563 * notifications based on the error response 1564 */ 1565 static void 1566 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1567 struct sctp_asconf_paramhdr *aph) 1568 { 1569 struct sctp_error_cause *eh; 1570 struct sctp_paramhdr *ph; 1571 uint16_t param_type; 1572 uint16_t error_code; 1573 1574 eh = (struct sctp_error_cause *)(aph + 1); 1575 ph = (struct sctp_paramhdr *)(eh + 1); 1576 /* validate lengths */ 1577 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1578 htons(aph->ph.param_length)) { 1579 /* invalid error cause length */ 1580 SCTPDBG(SCTP_DEBUG_ASCONF1, 1581 "asconf_process_error: cause element too long\n"); 1582 return; 1583 } 1584 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1585 htons(eh->length)) { 1586 /* invalid included TLV length */ 1587 SCTPDBG(SCTP_DEBUG_ASCONF1, 1588 "asconf_process_error: included TLV too long\n"); 1589 return; 1590 } 1591 /* which error code ? */ 1592 error_code = ntohs(eh->code); 1593 param_type = ntohs(aph->ph.param_type); 1594 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1595 switch (error_code) { 1596 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1597 /* we allow ourselves to "try again" for this error */ 1598 break; 1599 default: 1600 /* peer can't handle it... */ 1601 switch (param_type) { 1602 case SCTP_ADD_IP_ADDRESS: 1603 case SCTP_DEL_IP_ADDRESS: 1604 case SCTP_SET_PRIM_ADDR: 1605 break; 1606 default: 1607 break; 1608 } 1609 } 1610 } 1611 1612 /* 1613 * process an asconf queue param. 1614 * aparam: parameter to process, will be removed from the queue. 1615 * flag: 1=success case, 0=failure case 1616 */ 1617 static void 1618 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1619 struct sctp_asconf_addr *aparam, uint32_t flag) 1620 { 1621 uint16_t param_type; 1622 1623 /* process this param */ 1624 param_type = aparam->ap.aph.ph.param_type; 1625 switch (param_type) { 1626 case SCTP_ADD_IP_ADDRESS: 1627 SCTPDBG(SCTP_DEBUG_ASCONF1, 1628 "process_param_ack: added IP address\n"); 1629 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1630 break; 1631 case SCTP_DEL_IP_ADDRESS: 1632 SCTPDBG(SCTP_DEBUG_ASCONF1, 1633 "process_param_ack: deleted IP address\n"); 1634 /* nothing really to do... lists already updated */ 1635 break; 1636 case SCTP_SET_PRIM_ADDR: 1637 SCTPDBG(SCTP_DEBUG_ASCONF1, 1638 "process_param_ack: set primary IP address\n"); 1639 /* nothing to do... peer may start using this addr */ 1640 break; 1641 default: 1642 /* should NEVER happen */ 1643 break; 1644 } 1645 1646 /* remove the param and free it */ 1647 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1648 if (aparam->ifa) 1649 sctp_free_ifa(aparam->ifa); 1650 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1651 } 1652 1653 /* 1654 * cleanup from a bad asconf ack parameter 1655 */ 1656 static void 1657 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1658 { 1659 /* assume peer doesn't really know how to do asconfs */ 1660 /* XXX we could free the pending queue here */ 1661 1662 } 1663 1664 void 1665 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1666 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1667 struct sctp_nets *net, int *abort_no_unlock) 1668 { 1669 struct sctp_association *asoc; 1670 uint32_t serial_num; 1671 uint16_t ack_length; 1672 struct sctp_asconf_paramhdr *aph; 1673 struct sctp_asconf_addr *aa, *aa_next; 1674 uint32_t last_error_id = 0; /* last error correlation id */ 1675 uint32_t id; 1676 struct sctp_asconf_addr *ap; 1677 1678 /* asconf param buffer */ 1679 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1680 1681 /* verify minimum length */ 1682 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1683 SCTPDBG(SCTP_DEBUG_ASCONF1, 1684 "handle_asconf_ack: chunk too small = %xh\n", 1685 ntohs(cp->ch.chunk_length)); 1686 return; 1687 } 1688 asoc = &stcb->asoc; 1689 serial_num = ntohl(cp->serial_number); 1690 1691 /* 1692 * NOTE: we may want to handle this differently- currently, we will 1693 * abort when we get an ack for the expected serial number + 1 (eg. 1694 * we didn't send it), process an ack normally if it is the expected 1695 * serial number, and re-send the previous ack for *ALL* other 1696 * serial numbers 1697 */ 1698 1699 /* 1700 * if the serial number is the next expected, but I didn't send it, 1701 * abort the asoc, since someone probably just hijacked us... 1702 */ 1703 if (serial_num == (asoc->asconf_seq_out + 1)) { 1704 struct mbuf *op_err; 1705 char msg[SCTP_DIAG_INFO_LEN]; 1706 1707 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1708 SCTP_SNPRINTF(msg, sizeof(msg), "Never sent serial number %8.8x", serial_num); 1709 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg); 1710 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); 1711 *abort_no_unlock = 1; 1712 return; 1713 } 1714 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1715 /* got a duplicate/unexpected ASCONF-ACK */ 1716 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1717 serial_num, asoc->asconf_seq_out_acked + 1); 1718 return; 1719 } 1720 1721 if (serial_num == asoc->asconf_seq_out - 1) { 1722 /* stop our timer */ 1723 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, 1724 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1725 } 1726 1727 /* process the ASCONF-ACK contents */ 1728 ack_length = ntohs(cp->ch.chunk_length) - 1729 sizeof(struct sctp_asconf_ack_chunk); 1730 offset += sizeof(struct sctp_asconf_ack_chunk); 1731 /* process through all parameters */ 1732 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1733 unsigned int param_length, param_type; 1734 1735 /* get pointer to next asconf parameter */ 1736 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1737 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1738 if (aph == NULL) { 1739 /* can't get an asconf paramhdr */ 1740 sctp_asconf_ack_clear(stcb); 1741 return; 1742 } 1743 param_type = ntohs(aph->ph.param_type); 1744 param_length = ntohs(aph->ph.param_length); 1745 if (param_length > ack_length) { 1746 sctp_asconf_ack_clear(stcb); 1747 return; 1748 } 1749 if (param_length < sizeof(struct sctp_paramhdr)) { 1750 sctp_asconf_ack_clear(stcb); 1751 return; 1752 } 1753 /* get the complete parameter... */ 1754 if (param_length > sizeof(aparam_buf)) { 1755 SCTPDBG(SCTP_DEBUG_ASCONF1, 1756 "param length (%u) larger than buffer size!\n", param_length); 1757 sctp_asconf_ack_clear(stcb); 1758 return; 1759 } 1760 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1761 if (aph == NULL) { 1762 sctp_asconf_ack_clear(stcb); 1763 return; 1764 } 1765 /* correlation_id is transparent to peer, no ntohl needed */ 1766 id = aph->correlation_id; 1767 1768 switch (param_type) { 1769 case SCTP_ERROR_CAUSE_IND: 1770 last_error_id = id; 1771 /* find the corresponding asconf param in our queue */ 1772 ap = sctp_asconf_find_param(stcb, id); 1773 if (ap == NULL) { 1774 /* hmm... can't find this in our queue! */ 1775 break; 1776 } 1777 /* process the parameter, failed flag */ 1778 sctp_asconf_process_param_ack(stcb, ap, 0); 1779 /* process the error response */ 1780 sctp_asconf_process_error(stcb, aph); 1781 break; 1782 case SCTP_SUCCESS_REPORT: 1783 /* find the corresponding asconf param in our queue */ 1784 ap = sctp_asconf_find_param(stcb, id); 1785 if (ap == NULL) { 1786 /* hmm... can't find this in our queue! */ 1787 break; 1788 } 1789 /* process the parameter, success flag */ 1790 sctp_asconf_process_param_ack(stcb, ap, 1); 1791 break; 1792 default: 1793 break; 1794 } /* switch */ 1795 1796 /* update remaining ASCONF-ACK message length to process */ 1797 if (ack_length > SCTP_SIZE32(param_length)) { 1798 ack_length -= SCTP_SIZE32(param_length); 1799 } else { 1800 break; 1801 } 1802 offset += SCTP_SIZE32(param_length); 1803 } /* while */ 1804 1805 /* 1806 * if there are any "sent" params still on the queue, these are 1807 * implicitly "success", or "failed" (if we got an error back) ... 1808 * so process these appropriately 1809 * 1810 * we assume that the correlation_id's are monotonically increasing 1811 * beginning from 1 and that we don't have *that* many outstanding 1812 * at any given time 1813 */ 1814 if (last_error_id == 0) 1815 last_error_id--; /* set to "max" value */ 1816 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1817 if (aa->sent == 1) { 1818 /* 1819 * implicitly successful or failed if correlation_id 1820 * < last_error_id, then success else, failure 1821 */ 1822 if (aa->ap.aph.correlation_id < last_error_id) 1823 sctp_asconf_process_param_ack(stcb, aa, 1); 1824 else 1825 sctp_asconf_process_param_ack(stcb, aa, 0); 1826 } else { 1827 /* 1828 * since we always process in order (FIFO queue) if 1829 * we reach one that hasn't been sent, the rest 1830 * should not have been sent either. so, we're 1831 * done... 1832 */ 1833 break; 1834 } 1835 } 1836 1837 /* update the next sequence number to use */ 1838 asoc->asconf_seq_out_acked++; 1839 /* remove the old ASCONF on our outbound queue */ 1840 sctp_toss_old_asconf(stcb); 1841 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1842 #ifdef SCTP_TIMER_BASED_ASCONF 1843 /* we have more params, so restart our timer */ 1844 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1845 stcb, net); 1846 #else 1847 /* we have more params, so send out more */ 1848 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1849 #endif 1850 } 1851 } 1852 1853 #ifdef INET6 1854 static uint32_t 1855 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1856 { 1857 struct sockaddr_in6 *sin6, *net6; 1858 struct sctp_nets *net; 1859 1860 if (sa->sa_family != AF_INET6) { 1861 /* wrong family */ 1862 return (0); 1863 } 1864 sin6 = (struct sockaddr_in6 *)sa; 1865 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1866 /* not link local address */ 1867 return (0); 1868 } 1869 /* hunt through our destination nets list for this scope_id */ 1870 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1871 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1872 AF_INET6) 1873 continue; 1874 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1875 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1876 continue; 1877 if (sctp_is_same_scope(sin6, net6)) { 1878 /* found one */ 1879 return (1); 1880 } 1881 } 1882 /* didn't find one */ 1883 return (0); 1884 } 1885 #endif 1886 1887 /* 1888 * address management functions 1889 */ 1890 static void 1891 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1892 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1893 { 1894 int status; 1895 1896 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1897 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1898 /* subset bound, no ASCONF allowed case, so ignore */ 1899 return; 1900 } 1901 /* 1902 * note: we know this is not the subset bound, no ASCONF case eg. 1903 * this is boundall or subset bound w/ASCONF allowed 1904 */ 1905 1906 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1907 switch (ifa->address.sa.sa_family) { 1908 #ifdef INET6 1909 case AF_INET6: 1910 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1911 &ifa->address.sin6.sin6_addr) != 0) { 1912 return; 1913 } 1914 break; 1915 #endif 1916 #ifdef INET 1917 case AF_INET: 1918 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1919 &ifa->address.sin.sin_addr) != 0) { 1920 return; 1921 } 1922 break; 1923 #endif 1924 default: 1925 return; 1926 } 1927 #ifdef INET6 1928 /* make sure we're "allowed" to add this type of addr */ 1929 if (ifa->address.sa.sa_family == AF_INET6) { 1930 /* invalid if we're not a v6 endpoint */ 1931 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1932 return; 1933 /* is the v6 addr really valid ? */ 1934 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1935 return; 1936 } 1937 } 1938 #endif 1939 /* put this address on the "pending/do not use yet" list */ 1940 sctp_add_local_addr_restricted(stcb, ifa); 1941 /* 1942 * check address scope if address is out of scope, don't queue 1943 * anything... note: this would leave the address on both inp and 1944 * asoc lists 1945 */ 1946 switch (ifa->address.sa.sa_family) { 1947 #ifdef INET6 1948 case AF_INET6: 1949 { 1950 struct sockaddr_in6 *sin6; 1951 1952 sin6 = &ifa->address.sin6; 1953 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1954 /* we skip unspecifed addresses */ 1955 return; 1956 } 1957 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1958 if (stcb->asoc.scope.local_scope == 0) { 1959 return; 1960 } 1961 /* is it the right link local scope? */ 1962 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1963 return; 1964 } 1965 } 1966 if (stcb->asoc.scope.site_scope == 0 && 1967 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1968 return; 1969 } 1970 break; 1971 } 1972 #endif 1973 #ifdef INET 1974 case AF_INET: 1975 { 1976 struct sockaddr_in *sin; 1977 1978 /* invalid if we are a v6 only endpoint */ 1979 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1980 SCTP_IPV6_V6ONLY(inp)) 1981 return; 1982 1983 sin = &ifa->address.sin; 1984 if (sin->sin_addr.s_addr == 0) { 1985 /* we skip unspecifed addresses */ 1986 return; 1987 } 1988 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1989 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1990 return; 1991 } 1992 break; 1993 } 1994 #endif 1995 default: 1996 /* else, not AF_INET or AF_INET6, so skip */ 1997 return; 1998 } 1999 2000 /* queue an asconf for this address add/delete */ 2001 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 2002 /* does the peer do asconf? */ 2003 if (stcb->asoc.asconf_supported) { 2004 /* queue an asconf for this addr */ 2005 status = sctp_asconf_queue_add(stcb, ifa, type); 2006 2007 /* 2008 * if queued ok, and in the open state, send out the 2009 * ASCONF. If in the non-open state, these will be 2010 * sent when the state goes open. 2011 */ 2012 if (status == 0 && 2013 ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2014 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 2015 #ifdef SCTP_TIMER_BASED_ASCONF 2016 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 2017 stcb, stcb->asoc.primary_destination); 2018 #else 2019 sctp_send_asconf(stcb, NULL, addr_locked); 2020 #endif 2021 } 2022 } 2023 } 2024 } 2025 2026 2027 int 2028 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2029 { 2030 struct sctp_asconf_iterator *asc; 2031 struct sctp_ifa *ifa; 2032 struct sctp_laddr *l; 2033 int cnt_invalid = 0; 2034 2035 asc = (struct sctp_asconf_iterator *)ptr; 2036 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2037 ifa = l->ifa; 2038 switch (ifa->address.sa.sa_family) { 2039 #ifdef INET6 2040 case AF_INET6: 2041 /* invalid if we're not a v6 endpoint */ 2042 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2043 cnt_invalid++; 2044 if (asc->cnt == cnt_invalid) 2045 return (1); 2046 } 2047 break; 2048 #endif 2049 #ifdef INET 2050 case AF_INET: 2051 { 2052 /* invalid if we are a v6 only endpoint */ 2053 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2054 SCTP_IPV6_V6ONLY(inp)) { 2055 cnt_invalid++; 2056 if (asc->cnt == cnt_invalid) 2057 return (1); 2058 } 2059 break; 2060 } 2061 #endif 2062 default: 2063 /* invalid address family */ 2064 cnt_invalid++; 2065 if (asc->cnt == cnt_invalid) 2066 return (1); 2067 } 2068 } 2069 return (0); 2070 } 2071 2072 static int 2073 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2074 { 2075 struct sctp_ifa *ifa; 2076 struct sctp_asconf_iterator *asc; 2077 struct sctp_laddr *laddr, *nladdr, *l; 2078 2079 /* Only for specific case not bound all */ 2080 asc = (struct sctp_asconf_iterator *)ptr; 2081 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2082 ifa = l->ifa; 2083 if (l->action == SCTP_ADD_IP_ADDRESS) { 2084 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2085 sctp_nxt_addr) { 2086 if (laddr->ifa == ifa) { 2087 laddr->action = 0; 2088 break; 2089 } 2090 2091 } 2092 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2093 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2094 /* remove only after all guys are done */ 2095 if (laddr->ifa == ifa) { 2096 sctp_del_local_addr_ep(inp, ifa); 2097 } 2098 } 2099 } 2100 } 2101 return (0); 2102 } 2103 2104 void 2105 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2106 void *ptr, uint32_t val SCTP_UNUSED) 2107 { 2108 struct sctp_asconf_iterator *asc; 2109 struct sctp_ifa *ifa; 2110 struct sctp_laddr *l; 2111 int cnt_invalid = 0; 2112 int type, status; 2113 int num_queued = 0; 2114 2115 asc = (struct sctp_asconf_iterator *)ptr; 2116 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2117 ifa = l->ifa; 2118 type = l->action; 2119 2120 /* address's vrf_id must be the vrf_id of the assoc */ 2121 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2122 continue; 2123 } 2124 2125 /* Same checks again for assoc */ 2126 switch (ifa->address.sa.sa_family) { 2127 #ifdef INET6 2128 case AF_INET6: 2129 { 2130 /* invalid if we're not a v6 endpoint */ 2131 struct sockaddr_in6 *sin6; 2132 2133 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2134 cnt_invalid++; 2135 if (asc->cnt == cnt_invalid) 2136 return; 2137 else 2138 continue; 2139 } 2140 sin6 = &ifa->address.sin6; 2141 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2142 /* we skip unspecifed addresses */ 2143 continue; 2144 } 2145 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2146 &sin6->sin6_addr) != 0) { 2147 continue; 2148 } 2149 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2150 if (stcb->asoc.scope.local_scope == 0) { 2151 continue; 2152 } 2153 /* is it the right link local scope? */ 2154 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2155 continue; 2156 } 2157 } 2158 break; 2159 } 2160 #endif 2161 #ifdef INET 2162 case AF_INET: 2163 { 2164 /* invalid if we are a v6 only endpoint */ 2165 struct sockaddr_in *sin; 2166 2167 /* invalid if we are a v6 only endpoint */ 2168 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2169 SCTP_IPV6_V6ONLY(inp)) 2170 continue; 2171 2172 sin = &ifa->address.sin; 2173 if (sin->sin_addr.s_addr == 0) { 2174 /* we skip unspecifed addresses */ 2175 continue; 2176 } 2177 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2178 &sin->sin_addr) != 0) { 2179 continue; 2180 } 2181 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2182 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2183 continue; 2184 } 2185 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2186 SCTP_IPV6_V6ONLY(inp)) { 2187 cnt_invalid++; 2188 if (asc->cnt == cnt_invalid) 2189 return; 2190 else 2191 continue; 2192 } 2193 break; 2194 } 2195 #endif 2196 default: 2197 /* invalid address family */ 2198 cnt_invalid++; 2199 if (asc->cnt == cnt_invalid) 2200 return; 2201 else 2202 continue; 2203 break; 2204 } 2205 2206 if (type == SCTP_ADD_IP_ADDRESS) { 2207 /* prevent this address from being used as a source */ 2208 sctp_add_local_addr_restricted(stcb, ifa); 2209 } else if (type == SCTP_DEL_IP_ADDRESS) { 2210 struct sctp_nets *net; 2211 2212 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2213 /* delete this address if cached */ 2214 if (net->ro._s_addr == ifa) { 2215 sctp_free_ifa(net->ro._s_addr); 2216 net->ro._s_addr = NULL; 2217 net->src_addr_selected = 0; 2218 RO_NHFREE(&net->ro); 2219 /* 2220 * Now we deleted our src address, 2221 * should we not also now reset the 2222 * cwnd/rto to start as if its a new 2223 * address? 2224 */ 2225 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2226 net->RTO = 0; 2227 2228 } 2229 } 2230 } else if (type == SCTP_SET_PRIM_ADDR) { 2231 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2232 /* must validate the ifa is in the ep */ 2233 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2234 continue; 2235 } 2236 } else { 2237 /* Need to check scopes for this guy */ 2238 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2239 continue; 2240 } 2241 } 2242 } 2243 /* queue an asconf for this address add/delete */ 2244 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2245 stcb->asoc.asconf_supported == 1) { 2246 /* queue an asconf for this addr */ 2247 status = sctp_asconf_queue_add(stcb, ifa, type); 2248 /* 2249 * if queued ok, and in the open state, update the 2250 * count of queued params. If in the non-open 2251 * state, these get sent when the assoc goes open. 2252 */ 2253 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2254 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2255 if (status >= 0) { 2256 num_queued++; 2257 } 2258 } 2259 } 2260 } 2261 /* 2262 * If we have queued params in the open state, send out an ASCONF. 2263 */ 2264 if (num_queued > 0) { 2265 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2266 } 2267 } 2268 2269 void 2270 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2271 { 2272 struct sctp_asconf_iterator *asc; 2273 struct sctp_ifa *ifa; 2274 struct sctp_laddr *l, *nl; 2275 2276 asc = (struct sctp_asconf_iterator *)ptr; 2277 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2278 ifa = l->ifa; 2279 if (l->action == SCTP_ADD_IP_ADDRESS) { 2280 /* Clear the defer use flag */ 2281 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2282 } 2283 sctp_free_ifa(ifa); 2284 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2285 SCTP_DECR_LADDR_COUNT(); 2286 } 2287 SCTP_FREE(asc, SCTP_M_ASC_IT); 2288 } 2289 2290 /* 2291 * sa is the sockaddr to ask the peer to set primary to. 2292 * returns: 0 = completed, -1 = error 2293 */ 2294 int32_t 2295 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2296 { 2297 uint32_t vrf_id; 2298 struct sctp_ifa *ifa; 2299 2300 /* find the ifa for the desired set primary */ 2301 vrf_id = stcb->asoc.vrf_id; 2302 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2303 if (ifa == NULL) { 2304 /* Invalid address */ 2305 return (-1); 2306 } 2307 2308 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2309 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2310 /* set primary queuing succeeded */ 2311 SCTPDBG(SCTP_DEBUG_ASCONF1, 2312 "set_primary_ip_address_sa: queued on tcb=%p, ", 2313 (void *)stcb); 2314 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2315 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2316 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2317 #ifdef SCTP_TIMER_BASED_ASCONF 2318 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2319 stcb->sctp_ep, stcb, 2320 stcb->asoc.primary_destination); 2321 #else 2322 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2323 #endif 2324 } 2325 } else { 2326 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2327 (void *)stcb); 2328 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2329 return (-1); 2330 } 2331 return (0); 2332 } 2333 2334 int 2335 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2336 { 2337 struct sctp_tmit_chunk *chk, *nchk; 2338 unsigned int offset, asconf_limit; 2339 struct sctp_asconf_chunk *acp; 2340 struct sctp_asconf_paramhdr *aph; 2341 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2342 struct sctp_paramhdr *ph; 2343 int add_cnt, del_cnt; 2344 uint16_t last_param_type; 2345 2346 add_cnt = del_cnt = 0; 2347 last_param_type = 0; 2348 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2349 if (chk->data == NULL) { 2350 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2351 continue; 2352 } 2353 offset = 0; 2354 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2355 offset += sizeof(struct sctp_asconf_chunk); 2356 asconf_limit = ntohs(acp->ch.chunk_length); 2357 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2358 if (ph == NULL) { 2359 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2360 continue; 2361 } 2362 offset += ntohs(ph->param_length); 2363 2364 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2365 if (aph == NULL) { 2366 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2367 continue; 2368 } 2369 while (aph != NULL) { 2370 unsigned int param_length, param_type; 2371 2372 param_type = ntohs(aph->ph.param_type); 2373 param_length = ntohs(aph->ph.param_length); 2374 if (offset + param_length > asconf_limit) { 2375 /* parameter goes beyond end of chunk! */ 2376 break; 2377 } 2378 if (param_length > sizeof(aparam_buf)) { 2379 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2380 break; 2381 } 2382 if (param_length <= sizeof(struct sctp_paramhdr)) { 2383 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2384 break; 2385 } 2386 2387 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2388 if (aph == NULL) { 2389 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2390 break; 2391 } 2392 2393 ph = (struct sctp_paramhdr *)(aph + 1); 2394 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2395 switch (param_type) { 2396 case SCTP_ADD_IP_ADDRESS: 2397 add_cnt++; 2398 break; 2399 case SCTP_DEL_IP_ADDRESS: 2400 del_cnt++; 2401 break; 2402 default: 2403 break; 2404 } 2405 last_param_type = param_type; 2406 } 2407 2408 offset += SCTP_SIZE32(param_length); 2409 if (offset >= asconf_limit) { 2410 /* no more data in the mbuf chain */ 2411 break; 2412 } 2413 /* get pointer to next asconf param */ 2414 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2415 } 2416 } 2417 2418 /* 2419 * we want to find the sequences which consist of ADD -> DEL -> ADD 2420 * or DEL -> ADD 2421 */ 2422 if (add_cnt > del_cnt || 2423 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2424 return (1); 2425 } 2426 return (0); 2427 } 2428 2429 static struct sockaddr * 2430 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2431 { 2432 struct sctp_vrf *vrf = NULL; 2433 struct sctp_ifn *sctp_ifn; 2434 struct sctp_ifa *sctp_ifa; 2435 2436 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2437 SCTP_IPI_ADDR_RLOCK(); 2438 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2439 if (vrf == NULL) { 2440 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2441 SCTP_IPI_ADDR_RUNLOCK(); 2442 return (NULL); 2443 } 2444 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2445 if (stcb->asoc.scope.loopback_scope == 0 && 2446 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2447 /* Skip if loopback_scope not set */ 2448 continue; 2449 } 2450 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2451 switch (sctp_ifa->address.sa.sa_family) { 2452 #ifdef INET 2453 case AF_INET: 2454 if (stcb->asoc.scope.ipv4_addr_legal) { 2455 struct sockaddr_in *sin; 2456 2457 sin = &sctp_ifa->address.sin; 2458 if (sin->sin_addr.s_addr == 0) { 2459 /* skip unspecifed addresses */ 2460 continue; 2461 } 2462 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2463 &sin->sin_addr) != 0) { 2464 continue; 2465 } 2466 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2467 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2468 continue; 2469 2470 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2471 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2472 continue; 2473 /* 2474 * found a valid local v4 address to 2475 * use 2476 */ 2477 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2478 SCTP_IPI_ADDR_RUNLOCK(); 2479 return (&sctp_ifa->address.sa); 2480 } 2481 break; 2482 #endif 2483 #ifdef INET6 2484 case AF_INET6: 2485 if (stcb->asoc.scope.ipv6_addr_legal) { 2486 struct sockaddr_in6 *sin6; 2487 2488 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2489 continue; 2490 } 2491 2492 sin6 = &sctp_ifa->address.sin6; 2493 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2494 /* 2495 * we skip unspecifed 2496 * addresses 2497 */ 2498 continue; 2499 } 2500 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2501 &sin6->sin6_addr) != 0) { 2502 continue; 2503 } 2504 if (stcb->asoc.scope.local_scope == 0 && 2505 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2506 continue; 2507 if (stcb->asoc.scope.site_scope == 0 && 2508 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2509 continue; 2510 2511 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2512 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2513 continue; 2514 /* 2515 * found a valid local v6 address to 2516 * use 2517 */ 2518 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2519 SCTP_IPI_ADDR_RUNLOCK(); 2520 return (&sctp_ifa->address.sa); 2521 } 2522 break; 2523 #endif 2524 default: 2525 break; 2526 } 2527 } 2528 } 2529 /* no valid addresses found */ 2530 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2531 SCTP_IPI_ADDR_RUNLOCK(); 2532 return (NULL); 2533 } 2534 2535 static struct sockaddr * 2536 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2537 { 2538 struct sctp_laddr *laddr; 2539 2540 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2541 if (laddr->ifa == NULL) { 2542 continue; 2543 } 2544 /* is the address restricted ? */ 2545 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2546 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2547 continue; 2548 2549 /* found a valid local address to use */ 2550 return (&laddr->ifa->address.sa); 2551 } 2552 /* no valid addresses found */ 2553 return (NULL); 2554 } 2555 2556 /* 2557 * builds an ASCONF chunk from queued ASCONF params. 2558 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2559 */ 2560 struct mbuf * 2561 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2562 { 2563 struct mbuf *m_asconf, *m_asconf_chk; 2564 struct sctp_asconf_addr *aa; 2565 struct sctp_asconf_chunk *acp; 2566 struct sctp_asconf_paramhdr *aph; 2567 struct sctp_asconf_addr_param *aap; 2568 uint32_t p_length; 2569 uint32_t correlation_id = 1; /* 0 is reserved... */ 2570 caddr_t ptr, lookup_ptr; 2571 uint8_t lookup_used = 0; 2572 2573 /* are there any asconf params to send? */ 2574 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2575 if (aa->sent == 0) 2576 break; 2577 } 2578 if (aa == NULL) 2579 return (NULL); 2580 2581 /* 2582 * get a chunk header mbuf and a cluster for the asconf params since 2583 * it's simpler to fill in the asconf chunk header lookup address on 2584 * the fly 2585 */ 2586 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2587 if (m_asconf_chk == NULL) { 2588 /* no mbuf's */ 2589 SCTPDBG(SCTP_DEBUG_ASCONF1, 2590 "sctp_compose_asconf: couldn't get chunk mbuf!\n"); 2591 return (NULL); 2592 } 2593 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2594 if (m_asconf == NULL) { 2595 /* no mbuf's */ 2596 SCTPDBG(SCTP_DEBUG_ASCONF1, 2597 "sctp_compose_asconf: couldn't get mbuf!\n"); 2598 sctp_m_freem(m_asconf_chk); 2599 return (NULL); 2600 } 2601 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2602 SCTP_BUF_LEN(m_asconf) = 0; 2603 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2604 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2605 /* save pointers to lookup address and asconf params */ 2606 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2607 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2608 2609 /* fill in chunk header info */ 2610 acp->ch.chunk_type = SCTP_ASCONF; 2611 acp->ch.chunk_flags = 0; 2612 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2613 stcb->asoc.asconf_seq_out++; 2614 2615 /* add parameters... up to smallest MTU allowed */ 2616 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2617 if (aa->sent) 2618 continue; 2619 /* get the parameter length */ 2620 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2621 /* will it fit in current chunk? */ 2622 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2623 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2624 /* won't fit, so we're done with this chunk */ 2625 break; 2626 } 2627 /* assign (and store) a correlation id */ 2628 aa->ap.aph.correlation_id = correlation_id++; 2629 2630 /* 2631 * fill in address if we're doing a delete this is a simple 2632 * way for us to fill in the correlation address, which 2633 * should only be used by the peer if we're deleting our 2634 * source address and adding a new address (e.g. renumbering 2635 * case) 2636 */ 2637 if (lookup_used == 0 && 2638 (aa->special_del == 0) && 2639 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2640 struct sctp_ipv6addr_param *lookup; 2641 uint16_t p_size, addr_size; 2642 2643 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2644 lookup->ph.param_type = 2645 htons(aa->ap.addrp.ph.param_type); 2646 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2647 /* copy IPv6 address */ 2648 p_size = sizeof(struct sctp_ipv6addr_param); 2649 addr_size = sizeof(struct in6_addr); 2650 } else { 2651 /* copy IPv4 address */ 2652 p_size = sizeof(struct sctp_ipv4addr_param); 2653 addr_size = sizeof(struct in_addr); 2654 } 2655 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2656 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2657 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2658 lookup_used = 1; 2659 } 2660 /* copy into current space */ 2661 memcpy(ptr, &aa->ap, p_length); 2662 2663 /* network elements and update lengths */ 2664 aph = (struct sctp_asconf_paramhdr *)ptr; 2665 aap = (struct sctp_asconf_addr_param *)ptr; 2666 /* correlation_id is transparent to peer, no htonl needed */ 2667 aph->ph.param_type = htons(aph->ph.param_type); 2668 aph->ph.param_length = htons(aph->ph.param_length); 2669 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2670 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2671 2672 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2673 ptr += SCTP_SIZE32(p_length); 2674 2675 /* 2676 * these params are removed off the pending list upon 2677 * getting an ASCONF-ACK back from the peer, just set flag 2678 */ 2679 aa->sent = 1; 2680 } 2681 /* check to see if the lookup addr has been populated yet */ 2682 if (lookup_used == 0) { 2683 /* NOTE: if the address param is optional, can skip this... */ 2684 /* add any valid (existing) address... */ 2685 struct sctp_ipv6addr_param *lookup; 2686 uint16_t p_size, addr_size; 2687 struct sockaddr *found_addr; 2688 caddr_t addr_ptr; 2689 2690 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2691 found_addr = sctp_find_valid_localaddr(stcb, 2692 addr_locked); 2693 else 2694 found_addr = sctp_find_valid_localaddr_ep(stcb); 2695 2696 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2697 if (found_addr != NULL) { 2698 switch (found_addr->sa_family) { 2699 #ifdef INET6 2700 case AF_INET6: 2701 /* copy IPv6 address */ 2702 lookup->ph.param_type = 2703 htons(SCTP_IPV6_ADDRESS); 2704 p_size = sizeof(struct sctp_ipv6addr_param); 2705 addr_size = sizeof(struct in6_addr); 2706 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2707 found_addr)->sin6_addr; 2708 break; 2709 #endif 2710 #ifdef INET 2711 case AF_INET: 2712 /* copy IPv4 address */ 2713 lookup->ph.param_type = 2714 htons(SCTP_IPV4_ADDRESS); 2715 p_size = sizeof(struct sctp_ipv4addr_param); 2716 addr_size = sizeof(struct in_addr); 2717 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2718 found_addr)->sin_addr; 2719 break; 2720 #endif 2721 default: 2722 SCTPDBG(SCTP_DEBUG_ASCONF1, 2723 "sctp_compose_asconf: no usable lookup addr (family = %d)!\n", 2724 found_addr->sa_family); 2725 sctp_m_freem(m_asconf_chk); 2726 sctp_m_freem(m_asconf); 2727 return (NULL); 2728 } 2729 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2730 memcpy(lookup->addr, addr_ptr, addr_size); 2731 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2732 } else { 2733 /* uh oh... don't have any address?? */ 2734 SCTPDBG(SCTP_DEBUG_ASCONF1, 2735 "sctp_compose_asconf: no lookup addr!\n"); 2736 sctp_m_freem(m_asconf_chk); 2737 sctp_m_freem(m_asconf); 2738 return (NULL); 2739 } 2740 } 2741 /* chain it all together */ 2742 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2743 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2744 acp->ch.chunk_length = htons(*retlen); 2745 2746 return (m_asconf_chk); 2747 } 2748 2749 /* 2750 * section to handle address changes before an association is up eg. changes 2751 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2752 */ 2753 2754 /* 2755 * processes the (local) addresses in the INIT-ACK chunk 2756 */ 2757 static void 2758 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2759 unsigned int offset, unsigned int length) 2760 { 2761 struct sctp_paramhdr tmp_param, *ph; 2762 uint16_t plen, ptype; 2763 struct sctp_ifa *sctp_ifa; 2764 union sctp_sockstore store; 2765 #ifdef INET6 2766 struct sctp_ipv6addr_param addr6_store; 2767 #endif 2768 #ifdef INET 2769 struct sctp_ipv4addr_param addr4_store; 2770 #endif 2771 2772 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2773 if (stcb == NULL) /* Un-needed check for SA */ 2774 return; 2775 2776 /* convert to upper bound */ 2777 length += offset; 2778 2779 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2780 return; 2781 } 2782 /* go through the addresses in the init-ack */ 2783 ph = (struct sctp_paramhdr *) 2784 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2785 (uint8_t *)&tmp_param); 2786 while (ph != NULL) { 2787 ptype = ntohs(ph->param_type); 2788 plen = ntohs(ph->param_length); 2789 switch (ptype) { 2790 #ifdef INET6 2791 case SCTP_IPV6_ADDRESS: 2792 { 2793 struct sctp_ipv6addr_param *a6p; 2794 2795 /* get the entire IPv6 address param */ 2796 a6p = (struct sctp_ipv6addr_param *) 2797 sctp_m_getptr(m, offset, 2798 sizeof(struct sctp_ipv6addr_param), 2799 (uint8_t *)&addr6_store); 2800 if (plen != sizeof(struct sctp_ipv6addr_param) || 2801 a6p == NULL) { 2802 return; 2803 } 2804 memset(&store, 0, sizeof(union sctp_sockstore)); 2805 store.sin6.sin6_family = AF_INET6; 2806 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2807 store.sin6.sin6_port = stcb->rport; 2808 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2809 break; 2810 } 2811 #endif 2812 #ifdef INET 2813 case SCTP_IPV4_ADDRESS: 2814 { 2815 struct sctp_ipv4addr_param *a4p; 2816 2817 /* get the entire IPv4 address param */ 2818 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2819 sizeof(struct sctp_ipv4addr_param), 2820 (uint8_t *)&addr4_store); 2821 if (plen != sizeof(struct sctp_ipv4addr_param) || 2822 a4p == NULL) { 2823 return; 2824 } 2825 memset(&store, 0, sizeof(union sctp_sockstore)); 2826 store.sin.sin_family = AF_INET; 2827 store.sin.sin_len = sizeof(struct sockaddr_in); 2828 store.sin.sin_port = stcb->rport; 2829 store.sin.sin_addr.s_addr = a4p->addr; 2830 break; 2831 } 2832 #endif 2833 default: 2834 goto next_addr; 2835 } 2836 2837 /* see if this address really (still) exists */ 2838 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2839 SCTP_ADDR_NOT_LOCKED); 2840 if (sctp_ifa == NULL) { 2841 /* address doesn't exist anymore */ 2842 int status; 2843 2844 /* are ASCONFs allowed ? */ 2845 if ((sctp_is_feature_on(stcb->sctp_ep, 2846 SCTP_PCB_FLAGS_DO_ASCONF)) && 2847 stcb->asoc.asconf_supported) { 2848 /* queue an ASCONF DEL_IP_ADDRESS */ 2849 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2850 /* 2851 * if queued ok, and in correct state, send 2852 * out the ASCONF. 2853 */ 2854 if (status == 0 && 2855 SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) { 2856 #ifdef SCTP_TIMER_BASED_ASCONF 2857 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2858 stcb->sctp_ep, stcb, 2859 stcb->asoc.primary_destination); 2860 #else 2861 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2862 #endif 2863 } 2864 } 2865 } 2866 2867 next_addr: 2868 /* 2869 * Sanity check: Make sure the length isn't 0, otherwise 2870 * we'll be stuck in this loop for a long time... 2871 */ 2872 if (SCTP_SIZE32(plen) == 0) { 2873 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2874 plen, ptype); 2875 return; 2876 } 2877 /* get next parameter */ 2878 offset += SCTP_SIZE32(plen); 2879 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2880 return; 2881 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2882 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2883 } /* while */ 2884 } 2885 2886 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2887 /* 2888 * checks to see if a specific address is in the initack address list returns 2889 * 1 if found, 0 if not 2890 */ 2891 static uint32_t 2892 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2893 { 2894 struct sctp_paramhdr tmp_param, *ph; 2895 uint16_t plen, ptype; 2896 #ifdef INET 2897 struct sockaddr_in *sin; 2898 struct sctp_ipv4addr_param *a4p; 2899 struct sctp_ipv6addr_param addr4_store; 2900 #endif 2901 #ifdef INET6 2902 struct sockaddr_in6 *sin6; 2903 struct sctp_ipv6addr_param *a6p; 2904 struct sctp_ipv6addr_param addr6_store; 2905 struct sockaddr_in6 sin6_tmp; 2906 #endif 2907 2908 switch (sa->sa_family) { 2909 #ifdef INET 2910 case AF_INET: 2911 break; 2912 #endif 2913 #ifdef INET6 2914 case AF_INET6: 2915 break; 2916 #endif 2917 default: 2918 return (0); 2919 } 2920 2921 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2922 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2923 /* convert to upper bound */ 2924 length += offset; 2925 2926 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2927 SCTPDBG(SCTP_DEBUG_ASCONF1, 2928 "find_initack_addr: invalid offset?\n"); 2929 return (0); 2930 } 2931 /* go through the addresses in the init-ack */ 2932 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2933 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2934 while (ph != NULL) { 2935 ptype = ntohs(ph->param_type); 2936 plen = ntohs(ph->param_length); 2937 switch (ptype) { 2938 #ifdef INET6 2939 case SCTP_IPV6_ADDRESS: 2940 if (sa->sa_family == AF_INET6) { 2941 /* get the entire IPv6 address param */ 2942 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2943 break; 2944 } 2945 /* get the entire IPv6 address param */ 2946 a6p = (struct sctp_ipv6addr_param *) 2947 sctp_m_getptr(m, offset, 2948 sizeof(struct sctp_ipv6addr_param), 2949 (uint8_t *)&addr6_store); 2950 if (a6p == NULL) { 2951 return (0); 2952 } 2953 sin6 = (struct sockaddr_in6 *)sa; 2954 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2955 /* create a copy and clear scope */ 2956 memcpy(&sin6_tmp, sin6, 2957 sizeof(struct sockaddr_in6)); 2958 sin6 = &sin6_tmp; 2959 in6_clearscope(&sin6->sin6_addr); 2960 } 2961 if (memcmp(&sin6->sin6_addr, a6p->addr, 2962 sizeof(struct in6_addr)) == 0) { 2963 /* found it */ 2964 return (1); 2965 } 2966 } 2967 break; 2968 #endif /* INET6 */ 2969 #ifdef INET 2970 case SCTP_IPV4_ADDRESS: 2971 if (sa->sa_family == AF_INET) { 2972 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2973 break; 2974 } 2975 /* get the entire IPv4 address param */ 2976 a4p = (struct sctp_ipv4addr_param *) 2977 sctp_m_getptr(m, offset, 2978 sizeof(struct sctp_ipv4addr_param), 2979 (uint8_t *)&addr4_store); 2980 if (a4p == NULL) { 2981 return (0); 2982 } 2983 sin = (struct sockaddr_in *)sa; 2984 if (sin->sin_addr.s_addr == a4p->addr) { 2985 /* found it */ 2986 return (1); 2987 } 2988 } 2989 break; 2990 #endif 2991 default: 2992 break; 2993 } 2994 /* get next parameter */ 2995 offset += SCTP_SIZE32(plen); 2996 if (offset + sizeof(struct sctp_paramhdr) > length) { 2997 return (0); 2998 } 2999 ph = (struct sctp_paramhdr *) 3000 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3001 (uint8_t *)&tmp_param); 3002 } /* while */ 3003 /* not found! */ 3004 return (0); 3005 } 3006 3007 /* 3008 * makes sure that the current endpoint local addr list is consistent with 3009 * the new association (eg. subset bound, asconf allowed) adds addresses as 3010 * necessary 3011 */ 3012 static void 3013 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3014 int length, struct sockaddr *init_addr) 3015 { 3016 struct sctp_laddr *laddr; 3017 3018 /* go through the endpoint list */ 3019 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3020 /* be paranoid and validate the laddr */ 3021 if (laddr->ifa == NULL) { 3022 SCTPDBG(SCTP_DEBUG_ASCONF1, 3023 "check_addr_list_ep: laddr->ifa is NULL"); 3024 continue; 3025 } 3026 /* do i have it implicitly? */ 3027 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3028 continue; 3029 } 3030 /* check to see if in the init-ack */ 3031 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3032 /* try to add it */ 3033 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3034 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3035 } 3036 } 3037 } 3038 3039 /* 3040 * makes sure that the current kernel address list is consistent with the new 3041 * association (with all addrs bound) adds addresses as necessary 3042 */ 3043 static void 3044 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3045 int length, struct sockaddr *init_addr, 3046 uint16_t local_scope, uint16_t site_scope, 3047 uint16_t ipv4_scope, uint16_t loopback_scope) 3048 { 3049 struct sctp_vrf *vrf = NULL; 3050 struct sctp_ifn *sctp_ifn; 3051 struct sctp_ifa *sctp_ifa; 3052 uint32_t vrf_id; 3053 #ifdef INET 3054 struct sockaddr_in *sin; 3055 #endif 3056 #ifdef INET6 3057 struct sockaddr_in6 *sin6; 3058 #endif 3059 3060 if (stcb) { 3061 vrf_id = stcb->asoc.vrf_id; 3062 } else { 3063 return; 3064 } 3065 SCTP_IPI_ADDR_RLOCK(); 3066 vrf = sctp_find_vrf(vrf_id); 3067 if (vrf == NULL) { 3068 SCTP_IPI_ADDR_RUNLOCK(); 3069 return; 3070 } 3071 /* go through all our known interfaces */ 3072 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3073 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3074 /* skip loopback interface */ 3075 continue; 3076 } 3077 /* go through each interface address */ 3078 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3079 /* do i have it implicitly? */ 3080 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3081 continue; 3082 } 3083 switch (sctp_ifa->address.sa.sa_family) { 3084 #ifdef INET 3085 case AF_INET: 3086 sin = &sctp_ifa->address.sin; 3087 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3088 &sin->sin_addr) != 0) { 3089 continue; 3090 } 3091 if ((ipv4_scope == 0) && 3092 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3093 /* private address not in scope */ 3094 continue; 3095 } 3096 break; 3097 #endif 3098 #ifdef INET6 3099 case AF_INET6: 3100 sin6 = &sctp_ifa->address.sin6; 3101 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3102 &sin6->sin6_addr) != 0) { 3103 continue; 3104 } 3105 if ((local_scope == 0) && 3106 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3107 continue; 3108 } 3109 if ((site_scope == 0) && 3110 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3111 continue; 3112 } 3113 break; 3114 #endif 3115 default: 3116 break; 3117 } 3118 /* check to see if in the init-ack */ 3119 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3120 /* try to add it */ 3121 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3122 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3123 SCTP_ADDR_LOCKED); 3124 } 3125 } /* end foreach ifa */ 3126 } /* end foreach ifn */ 3127 SCTP_IPI_ADDR_RUNLOCK(); 3128 } 3129 3130 /* 3131 * validates an init-ack chunk (from a cookie-echo) with current addresses 3132 * adds addresses from the init-ack into our local address list, if needed 3133 * queues asconf adds/deletes addresses as needed and makes appropriate list 3134 * changes for source address selection m, offset: points to the start of the 3135 * address list in an init-ack chunk length: total length of the address 3136 * params only init_addr: address where my INIT-ACK was sent from 3137 */ 3138 void 3139 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3140 int length, struct sockaddr *init_addr, 3141 uint16_t local_scope, uint16_t site_scope, 3142 uint16_t ipv4_scope, uint16_t loopback_scope) 3143 { 3144 /* process the local addresses in the initack */ 3145 sctp_process_initack_addresses(stcb, m, offset, length); 3146 3147 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3148 /* bound all case */ 3149 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3150 local_scope, site_scope, ipv4_scope, loopback_scope); 3151 } else { 3152 /* subset bound case */ 3153 if (sctp_is_feature_on(stcb->sctp_ep, 3154 SCTP_PCB_FLAGS_DO_ASCONF)) { 3155 /* asconf's allowed */ 3156 sctp_check_address_list_ep(stcb, m, offset, length, 3157 init_addr); 3158 } 3159 /* else, no asconfs allowed, so what we sent is what we get */ 3160 } 3161 } 3162 3163 /* 3164 * sctp_bindx() support 3165 */ 3166 uint32_t 3167 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3168 uint32_t type, uint32_t vrf_id) 3169 { 3170 struct sctp_ifa *ifa; 3171 struct sctp_laddr *laddr, *nladdr; 3172 3173 if (sa->sa_len == 0) { 3174 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3175 return (EINVAL); 3176 } 3177 if (type == SCTP_ADD_IP_ADDRESS) { 3178 /* For an add the address MUST be on the system */ 3179 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3180 } else if (type == SCTP_DEL_IP_ADDRESS) { 3181 /* For a delete we need to find it in the inp */ 3182 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3183 } else { 3184 ifa = NULL; 3185 } 3186 if (ifa != NULL) { 3187 if (type == SCTP_ADD_IP_ADDRESS) { 3188 sctp_add_local_addr_ep(inp, ifa, type); 3189 } else if (type == SCTP_DEL_IP_ADDRESS) { 3190 if (inp->laddr_count < 2) { 3191 /* can't delete the last local address */ 3192 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3193 return (EINVAL); 3194 } 3195 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3196 sctp_nxt_addr) { 3197 if (ifa == laddr->ifa) { 3198 /* Mark in the delete */ 3199 laddr->action = type; 3200 } 3201 } 3202 } 3203 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3204 /* 3205 * There is no need to start the iterator if the inp 3206 * has no associations. 3207 */ 3208 if (type == SCTP_DEL_IP_ADDRESS) { 3209 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3210 if (laddr->ifa == ifa) { 3211 sctp_del_local_addr_ep(inp, ifa); 3212 } 3213 } 3214 } 3215 } else { 3216 struct sctp_asconf_iterator *asc; 3217 struct sctp_laddr *wi; 3218 int ret; 3219 3220 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3221 sizeof(struct sctp_asconf_iterator), 3222 SCTP_M_ASC_IT); 3223 if (asc == NULL) { 3224 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3225 return (ENOMEM); 3226 } 3227 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3228 if (wi == NULL) { 3229 SCTP_FREE(asc, SCTP_M_ASC_IT); 3230 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3231 return (ENOMEM); 3232 } 3233 LIST_INIT(&asc->list_of_work); 3234 asc->cnt = 1; 3235 SCTP_INCR_LADDR_COUNT(); 3236 wi->ifa = ifa; 3237 wi->action = type; 3238 atomic_add_int(&ifa->refcount, 1); 3239 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3240 ret = sctp_initiate_iterator(sctp_asconf_iterator_ep, 3241 sctp_asconf_iterator_stcb, 3242 sctp_asconf_iterator_ep_end, 3243 SCTP_PCB_ANY_FLAGS, 3244 SCTP_PCB_ANY_FEATURES, 3245 SCTP_ASOC_ANY_STATE, 3246 (void *)asc, 0, 3247 sctp_asconf_iterator_end, inp, 0); 3248 if (ret) { 3249 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n"); 3250 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT); 3251 sctp_asconf_iterator_end(asc, 0); 3252 return (EFAULT); 3253 } 3254 } 3255 return (0); 3256 } else { 3257 /* invalid address! */ 3258 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3259 return (EADDRNOTAVAIL); 3260 } 3261 } 3262 3263 void 3264 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, struct sctp_nets *net) 3265 { 3266 struct sctp_asconf_addr *aa_vtag, *aa_add, *aa_del; 3267 struct sctp_ifa *sctp_ifap; 3268 struct sctp_asconf_tag_param *vtag; 3269 #ifdef INET 3270 struct sockaddr_in *to; 3271 #endif 3272 #ifdef INET6 3273 struct sockaddr_in6 *to6; 3274 #endif 3275 3276 if (net == NULL) { 3277 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3278 return; 3279 } 3280 if (stcb == NULL) { 3281 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3282 return; 3283 } 3284 /* 3285 * Need to have in the ASCONF: - VTAG(my_vtag/peer_vtag) - 3286 * ADD(wildcard) - DEL(wildcard) - ADD(Any global addresses) 3287 */ 3288 SCTP_MALLOC(aa_vtag, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); 3289 SCTP_MALLOC(aa_add, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); 3290 SCTP_MALLOC(aa_del, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); 3291 3292 if ((aa_vtag == NULL) || (aa_add == NULL) || (aa_del == NULL)) { 3293 /* Didn't get memory */ 3294 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3295 out: 3296 if (aa_vtag != NULL) { 3297 SCTP_FREE(aa_vtag, SCTP_M_ASC_ADDR); 3298 } 3299 if (aa_add != NULL) { 3300 SCTP_FREE(aa_add, SCTP_M_ASC_ADDR); 3301 } 3302 if (aa_del != NULL) { 3303 SCTP_FREE(aa_del, SCTP_M_ASC_ADDR); 3304 } 3305 return; 3306 } 3307 memset(aa_vtag, 0, sizeof(struct sctp_asconf_addr)); 3308 aa_vtag->special_del = 0; 3309 /* Fill in ASCONF address parameter fields. */ 3310 /* Top level elements are "networked" during send. */ 3311 aa_vtag->ifa = NULL; 3312 aa_vtag->sent = 0; /* clear sent flag */ 3313 vtag = (struct sctp_asconf_tag_param *)&aa_vtag->ap.aph; 3314 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3315 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3316 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3317 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3318 3319 memset(aa_add, 0, sizeof(struct sctp_asconf_addr)); 3320 memset(aa_del, 0, sizeof(struct sctp_asconf_addr)); 3321 switch (net->ro._l_addr.sa.sa_family) { 3322 #ifdef INET 3323 case AF_INET: 3324 aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3325 aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3326 aa_add->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3327 aa_add->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3328 /* No need to fill the address, we are using 0.0.0.0 */ 3329 aa_del->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3330 aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3331 aa_del->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3332 aa_del->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3333 /* No need to fill the address, we are using 0.0.0.0 */ 3334 break; 3335 #endif 3336 #ifdef INET6 3337 case AF_INET6: 3338 aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3339 aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3340 aa_add->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3341 aa_add->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3342 /* No need to fill the address, we are using ::0 */ 3343 aa_del->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3344 aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3345 aa_del->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3346 aa_del->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3347 /* No need to fill the address, we are using ::0 */ 3348 break; 3349 #endif 3350 default: 3351 SCTPDBG(SCTP_DEBUG_ASCONF1, 3352 "sctp_asconf_send_nat_state_update: unknown address family %d\n", 3353 net->ro._l_addr.sa.sa_family); 3354 goto out; 3355 } 3356 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_vtag, next); 3357 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_add, next); 3358 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_del, next); 3359 3360 /* Now we must hunt the addresses and add all global addresses */ 3361 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3362 struct sctp_vrf *vrf = NULL; 3363 struct sctp_ifn *sctp_ifnp; 3364 uint32_t vrf_id; 3365 3366 vrf_id = stcb->sctp_ep->def_vrf_id; 3367 vrf = sctp_find_vrf(vrf_id); 3368 if (vrf == NULL) { 3369 goto skip_rest; 3370 } 3371 3372 SCTP_IPI_ADDR_RLOCK(); 3373 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3374 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3375 switch (sctp_ifap->address.sa.sa_family) { 3376 #ifdef INET 3377 case AF_INET: 3378 to = &sctp_ifap->address.sin; 3379 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3380 &to->sin_addr) != 0) { 3381 continue; 3382 } 3383 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3384 continue; 3385 } 3386 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3387 continue; 3388 } 3389 break; 3390 #endif 3391 #ifdef INET6 3392 case AF_INET6: 3393 to6 = &sctp_ifap->address.sin6; 3394 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3395 &to6->sin6_addr) != 0) { 3396 continue; 3397 } 3398 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3399 continue; 3400 } 3401 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3402 continue; 3403 } 3404 break; 3405 #endif 3406 default: 3407 continue; 3408 } 3409 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3410 } 3411 } 3412 SCTP_IPI_ADDR_RUNLOCK(); 3413 } else { 3414 struct sctp_laddr *laddr; 3415 3416 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3417 if (laddr->ifa == NULL) { 3418 continue; 3419 } 3420 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3421 /* 3422 * Address being deleted by the system, dont 3423 * list. 3424 */ 3425 continue; 3426 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3427 /* 3428 * Address being deleted on this ep don't 3429 * list. 3430 */ 3431 continue; 3432 } 3433 sctp_ifap = laddr->ifa; 3434 switch (sctp_ifap->address.sa.sa_family) { 3435 #ifdef INET 3436 case AF_INET: 3437 to = &sctp_ifap->address.sin; 3438 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3439 continue; 3440 } 3441 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3442 continue; 3443 } 3444 break; 3445 #endif 3446 #ifdef INET6 3447 case AF_INET6: 3448 to6 = &sctp_ifap->address.sin6; 3449 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3450 continue; 3451 } 3452 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3453 continue; 3454 } 3455 break; 3456 #endif 3457 default: 3458 continue; 3459 } 3460 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3461 } 3462 } 3463 skip_rest: 3464 /* Now we must send the asconf into the queue */ 3465 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3466 } 3467