1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <netinet/sctp_var.h> 40 #include <netinet/sctp_sysctl.h> 41 #include <netinet/sctp_pcb.h> 42 #include <netinet/sctp_header.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp_output.h> 45 #include <netinet/sctp_asconf.h> 46 #include <netinet/sctp_timer.h> 47 48 /* 49 * debug flags: 50 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 51 * SCTP_DEBUG_ASCONF2: detailed info 52 */ 53 54 55 /* 56 * RFC 5061 57 * 58 * An ASCONF parameter queue exists per asoc which holds the pending address 59 * operations. Lists are updated upon receipt of ASCONF-ACK. 60 * 61 * A restricted_addrs list exists per assoc to hold local addresses that are 62 * not (yet) usable by the assoc as a source address. These addresses are 63 * either pending an ASCONF operation (and exist on the ASCONF parameter 64 * queue), or they are permanently restricted (the peer has returned an 65 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 66 * 67 * Deleted addresses are always immediately removed from the lists as they will 68 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 69 * only if allowed. 70 */ 71 72 /* 73 * ASCONF parameter processing. 74 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 75 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 76 * FIX: allocating this many mbufs on the fly is pretty inefficient... 77 */ 78 static struct mbuf * 79 sctp_asconf_success_response(uint32_t id) 80 { 81 struct mbuf *m_reply = NULL; 82 struct sctp_asconf_paramhdr *aph; 83 84 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 85 0, M_NOWAIT, 1, MT_DATA); 86 if (m_reply == NULL) { 87 SCTPDBG(SCTP_DEBUG_ASCONF1, 88 "asconf_success_response: couldn't get mbuf!\n"); 89 return (NULL); 90 } 91 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 92 aph->correlation_id = id; 93 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 94 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 95 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 96 aph->ph.param_length = htons(aph->ph.param_length); 97 98 return (m_reply); 99 } 100 101 static struct mbuf * 102 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv, 103 uint16_t tlv_length) 104 { 105 struct mbuf *m_reply = NULL; 106 struct sctp_asconf_paramhdr *aph; 107 struct sctp_error_cause *error; 108 uint8_t *tlv; 109 110 m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) + 111 tlv_length + 112 sizeof(struct sctp_error_cause)), 113 0, M_NOWAIT, 1, MT_DATA); 114 if (m_reply == NULL) { 115 SCTPDBG(SCTP_DEBUG_ASCONF1, 116 "asconf_error_response: couldn't get mbuf!\n"); 117 return (NULL); 118 } 119 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 120 error = (struct sctp_error_cause *)(aph + 1); 121 122 aph->correlation_id = id; 123 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 124 error->code = htons(cause); 125 error->length = tlv_length + sizeof(struct sctp_error_cause); 126 aph->ph.param_length = error->length + 127 sizeof(struct sctp_asconf_paramhdr); 128 129 if (aph->ph.param_length > MLEN) { 130 SCTPDBG(SCTP_DEBUG_ASCONF1, 131 "asconf_error_response: tlv_length (%xh) too big\n", 132 tlv_length); 133 sctp_m_freem(m_reply); /* discard */ 134 return (NULL); 135 } 136 if (error_tlv != NULL) { 137 tlv = (uint8_t *)(error + 1); 138 memcpy(tlv, error_tlv, tlv_length); 139 } 140 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 141 error->length = htons(error->length); 142 aph->ph.param_length = htons(aph->ph.param_length); 143 144 return (m_reply); 145 } 146 147 static struct mbuf * 148 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, 149 struct sctp_tcb *stcb, int send_hb, int response_required) 150 { 151 struct sctp_nets *net; 152 struct mbuf *m_reply = NULL; 153 union sctp_sockstore store; 154 struct sctp_paramhdr *ph; 155 uint16_t param_type, aparam_length; 156 #if defined(INET) || defined(INET6) 157 uint16_t param_length; 158 #endif 159 struct sockaddr *sa; 160 int zero_address = 0; 161 int bad_address = 0; 162 #ifdef INET 163 struct sockaddr_in *sin; 164 struct sctp_ipv4addr_param *v4addr; 165 #endif 166 #ifdef INET6 167 struct sockaddr_in6 *sin6; 168 struct sctp_ipv6addr_param *v6addr; 169 #endif 170 171 aparam_length = ntohs(aph->ph.param_length); 172 ph = (struct sctp_paramhdr *)(aph + 1); 173 param_type = ntohs(ph->param_type); 174 #if defined(INET) || defined(INET6) 175 param_length = ntohs(ph->param_length); 176 #endif 177 sa = &store.sa; 178 switch (param_type) { 179 #ifdef INET 180 case SCTP_IPV4_ADDRESS: 181 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 182 /* invalid param size */ 183 return (NULL); 184 } 185 v4addr = (struct sctp_ipv4addr_param *)ph; 186 sin = &store.sin; 187 memset(sin, 0, sizeof(*sin)); 188 sin->sin_family = AF_INET; 189 sin->sin_len = sizeof(struct sockaddr_in); 190 sin->sin_port = stcb->rport; 191 sin->sin_addr.s_addr = v4addr->addr; 192 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 193 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 194 bad_address = 1; 195 } 196 if (sin->sin_addr.s_addr == INADDR_ANY) 197 zero_address = 1; 198 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 199 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 200 break; 201 #endif 202 #ifdef INET6 203 case SCTP_IPV6_ADDRESS: 204 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 205 /* invalid param size */ 206 return (NULL); 207 } 208 v6addr = (struct sctp_ipv6addr_param *)ph; 209 sin6 = &store.sin6; 210 memset(sin6, 0, sizeof(*sin6)); 211 sin6->sin6_family = AF_INET6; 212 sin6->sin6_len = sizeof(struct sockaddr_in6); 213 sin6->sin6_port = stcb->rport; 214 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 215 sizeof(struct in6_addr)); 216 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 217 bad_address = 1; 218 } 219 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 220 zero_address = 1; 221 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 222 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 223 break; 224 #endif 225 default: 226 m_reply = sctp_asconf_error_response(aph->correlation_id, 227 SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph, 228 aparam_length); 229 return (m_reply); 230 } /* end switch */ 231 232 /* if 0.0.0.0/::0, add the source address instead */ 233 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 234 sa = src; 235 SCTPDBG(SCTP_DEBUG_ASCONF1, 236 "process_asconf_add_ip: using source addr "); 237 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 238 } 239 /* add the address */ 240 if (bad_address) { 241 m_reply = sctp_asconf_error_response(aph->correlation_id, 242 SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph, 243 aparam_length); 244 } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port, 245 SCTP_DONOT_SETSCOPE, 246 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 247 SCTPDBG(SCTP_DEBUG_ASCONF1, 248 "process_asconf_add_ip: error adding address\n"); 249 m_reply = sctp_asconf_error_response(aph->correlation_id, 250 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *)aph, 251 aparam_length); 252 } else { 253 /* notify upper layer */ 254 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 255 if (response_required) { 256 m_reply = 257 sctp_asconf_success_response(aph->correlation_id); 258 } 259 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 260 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 261 stcb, net); 262 if (send_hb) { 263 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 264 } 265 } 266 return (m_reply); 267 } 268 269 static int 270 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 271 { 272 struct sctp_nets *src_net, *net; 273 274 /* make sure the source address exists as a destination net */ 275 src_net = sctp_findnet(stcb, src); 276 if (src_net == NULL) { 277 /* not found */ 278 return (-1); 279 } 280 /* delete all destination addresses except the source */ 281 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 282 if (net != src_net) { 283 /* delete this address */ 284 sctp_remove_net(stcb, net); 285 SCTPDBG(SCTP_DEBUG_ASCONF1, 286 "asconf_del_remote_addrs_except: deleting "); 287 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 288 (struct sockaddr *)&net->ro._l_addr); 289 /* notify upper layer */ 290 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 291 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 292 } 293 } 294 return (0); 295 } 296 297 static struct mbuf * 298 sctp_process_asconf_delete_ip(struct sockaddr *src, 299 struct sctp_asconf_paramhdr *aph, 300 struct sctp_tcb *stcb, int response_required) 301 { 302 struct mbuf *m_reply = NULL; 303 union sctp_sockstore store; 304 struct sctp_paramhdr *ph; 305 uint16_t param_type, aparam_length; 306 #if defined(INET) || defined(INET6) 307 uint16_t param_length; 308 #endif 309 struct sockaddr *sa; 310 int zero_address = 0; 311 int result; 312 #ifdef INET 313 struct sockaddr_in *sin; 314 struct sctp_ipv4addr_param *v4addr; 315 #endif 316 #ifdef INET6 317 struct sockaddr_in6 *sin6; 318 struct sctp_ipv6addr_param *v6addr; 319 #endif 320 321 aparam_length = ntohs(aph->ph.param_length); 322 ph = (struct sctp_paramhdr *)(aph + 1); 323 param_type = ntohs(ph->param_type); 324 #if defined(INET) || defined(INET6) 325 param_length = ntohs(ph->param_length); 326 #endif 327 sa = &store.sa; 328 switch (param_type) { 329 #ifdef INET 330 case SCTP_IPV4_ADDRESS: 331 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 332 /* invalid param size */ 333 return (NULL); 334 } 335 v4addr = (struct sctp_ipv4addr_param *)ph; 336 sin = &store.sin; 337 memset(sin, 0, sizeof(*sin)); 338 sin->sin_family = AF_INET; 339 sin->sin_len = sizeof(struct sockaddr_in); 340 sin->sin_port = stcb->rport; 341 sin->sin_addr.s_addr = v4addr->addr; 342 if (sin->sin_addr.s_addr == INADDR_ANY) 343 zero_address = 1; 344 SCTPDBG(SCTP_DEBUG_ASCONF1, 345 "process_asconf_delete_ip: deleting "); 346 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 347 break; 348 #endif 349 #ifdef INET6 350 case SCTP_IPV6_ADDRESS: 351 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 352 /* invalid param size */ 353 return (NULL); 354 } 355 v6addr = (struct sctp_ipv6addr_param *)ph; 356 sin6 = &store.sin6; 357 memset(sin6, 0, sizeof(*sin6)); 358 sin6->sin6_family = AF_INET6; 359 sin6->sin6_len = sizeof(struct sockaddr_in6); 360 sin6->sin6_port = stcb->rport; 361 memcpy(&sin6->sin6_addr, v6addr->addr, 362 sizeof(struct in6_addr)); 363 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 364 zero_address = 1; 365 SCTPDBG(SCTP_DEBUG_ASCONF1, 366 "process_asconf_delete_ip: deleting "); 367 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 368 break; 369 #endif 370 default: 371 m_reply = sctp_asconf_error_response(aph->correlation_id, 372 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 373 aparam_length); 374 return (m_reply); 375 } 376 377 /* make sure the source address is not being deleted */ 378 if (sctp_cmpaddr(sa, src)) { 379 /* trying to delete the source address! */ 380 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 381 m_reply = sctp_asconf_error_response(aph->correlation_id, 382 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph, 383 aparam_length); 384 return (m_reply); 385 } 386 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 387 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 388 result = sctp_asconf_del_remote_addrs_except(stcb, src); 389 390 if (result) { 391 /* src address did not exist? */ 392 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 393 /* what error to reply with?? */ 394 m_reply = 395 sctp_asconf_error_response(aph->correlation_id, 396 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph, 397 aparam_length); 398 } else if (response_required) { 399 m_reply = 400 sctp_asconf_success_response(aph->correlation_id); 401 } 402 return (m_reply); 403 } 404 /* delete the address */ 405 result = sctp_del_remote_addr(stcb, sa); 406 /* 407 * note if result == -2, the address doesn't exist in the asoc but 408 * since it's being deleted anyways, we just ack the delete -- but 409 * this probably means something has already gone awry 410 */ 411 if (result == -1) { 412 /* only one address in the asoc */ 413 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 414 m_reply = sctp_asconf_error_response(aph->correlation_id, 415 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph, 416 aparam_length); 417 } else { 418 if (response_required) { 419 m_reply = sctp_asconf_success_response(aph->correlation_id); 420 } 421 /* notify upper layer */ 422 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 423 } 424 return (m_reply); 425 } 426 427 static struct mbuf * 428 sctp_process_asconf_set_primary(struct sockaddr *src, 429 struct sctp_asconf_paramhdr *aph, 430 struct sctp_tcb *stcb, int response_required) 431 { 432 struct mbuf *m_reply = NULL; 433 union sctp_sockstore store; 434 struct sctp_paramhdr *ph; 435 uint16_t param_type, aparam_length; 436 #if defined(INET) || defined(INET6) 437 uint16_t param_length; 438 #endif 439 struct sockaddr *sa; 440 int zero_address = 0; 441 #ifdef INET 442 struct sockaddr_in *sin; 443 struct sctp_ipv4addr_param *v4addr; 444 #endif 445 #ifdef INET6 446 struct sockaddr_in6 *sin6; 447 struct sctp_ipv6addr_param *v6addr; 448 #endif 449 450 aparam_length = ntohs(aph->ph.param_length); 451 ph = (struct sctp_paramhdr *)(aph + 1); 452 param_type = ntohs(ph->param_type); 453 #if defined(INET) || defined(INET6) 454 param_length = ntohs(ph->param_length); 455 #endif 456 sa = &store.sa; 457 switch (param_type) { 458 #ifdef INET 459 case SCTP_IPV4_ADDRESS: 460 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 461 /* invalid param size */ 462 return (NULL); 463 } 464 v4addr = (struct sctp_ipv4addr_param *)ph; 465 sin = &store.sin; 466 memset(sin, 0, sizeof(*sin)); 467 sin->sin_family = AF_INET; 468 sin->sin_len = sizeof(struct sockaddr_in); 469 sin->sin_addr.s_addr = v4addr->addr; 470 if (sin->sin_addr.s_addr == INADDR_ANY) 471 zero_address = 1; 472 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 473 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 474 break; 475 #endif 476 #ifdef INET6 477 case SCTP_IPV6_ADDRESS: 478 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 479 /* invalid param size */ 480 return (NULL); 481 } 482 v6addr = (struct sctp_ipv6addr_param *)ph; 483 sin6 = &store.sin6; 484 memset(sin6, 0, sizeof(*sin6)); 485 sin6->sin6_family = AF_INET6; 486 sin6->sin6_len = sizeof(struct sockaddr_in6); 487 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 488 sizeof(struct in6_addr)); 489 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 490 zero_address = 1; 491 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 492 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 493 break; 494 #endif 495 default: 496 m_reply = sctp_asconf_error_response(aph->correlation_id, 497 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 498 aparam_length); 499 return (m_reply); 500 } 501 502 /* if 0.0.0.0/::0, use the source address instead */ 503 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 504 sa = src; 505 SCTPDBG(SCTP_DEBUG_ASCONF1, 506 "process_asconf_set_primary: using source addr "); 507 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 508 } 509 /* set the primary address */ 510 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 511 SCTPDBG(SCTP_DEBUG_ASCONF1, 512 "process_asconf_set_primary: primary address set\n"); 513 /* notify upper layer */ 514 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 515 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 516 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 517 (stcb->asoc.alternate)) { 518 sctp_free_remote_addr(stcb->asoc.alternate); 519 stcb->asoc.alternate = NULL; 520 } 521 if (response_required) { 522 m_reply = sctp_asconf_success_response(aph->correlation_id); 523 } 524 /* 525 * Mobility adaptation. Ideally, when the reception of SET 526 * PRIMARY with DELETE IP ADDRESS of the previous primary 527 * destination, unacknowledged DATA are retransmitted 528 * immediately to the new primary destination for seamless 529 * handover. If the destination is UNCONFIRMED and marked to 530 * REQ_PRIM, The retransmission occur when reception of the 531 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 532 * sctp_input.c) Also, when change of the primary 533 * destination, it is better that all subsequent new DATA 534 * containing already queued DATA are transmitted to the new 535 * primary destination. (by micchie) 536 */ 537 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 538 SCTP_MOBILITY_BASE) || 539 sctp_is_mobility_feature_on(stcb->sctp_ep, 540 SCTP_MOBILITY_FASTHANDOFF)) && 541 sctp_is_mobility_feature_on(stcb->sctp_ep, 542 SCTP_MOBILITY_PRIM_DELETED) && 543 (stcb->asoc.primary_destination->dest_state & 544 SCTP_ADDR_UNCONFIRMED) == 0) { 545 546 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, 547 stcb->sctp_ep, stcb, NULL, 548 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1); 549 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 550 SCTP_MOBILITY_FASTHANDOFF)) { 551 sctp_assoc_immediate_retrans(stcb, 552 stcb->asoc.primary_destination); 553 } 554 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 555 SCTP_MOBILITY_BASE)) { 556 sctp_move_chunks_from_net(stcb, 557 stcb->asoc.deleted_primary); 558 } 559 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 560 stcb->asoc.deleted_primary); 561 } 562 } else { 563 /* couldn't set the requested primary address! */ 564 SCTPDBG(SCTP_DEBUG_ASCONF1, 565 "process_asconf_set_primary: set primary failed!\n"); 566 /* must have been an invalid address, so report */ 567 m_reply = sctp_asconf_error_response(aph->correlation_id, 568 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 569 aparam_length); 570 } 571 572 return (m_reply); 573 } 574 575 /* 576 * handles an ASCONF chunk. 577 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 578 */ 579 void 580 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 581 struct sockaddr *src, 582 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 583 int first) 584 { 585 struct sctp_association *asoc; 586 uint32_t serial_num; 587 struct mbuf *n, *m_ack, *m_result, *m_tail; 588 struct sctp_asconf_ack_chunk *ack_cp; 589 struct sctp_asconf_paramhdr *aph; 590 struct sctp_ipv6addr_param *p_addr; 591 unsigned int asconf_limit, cnt; 592 int error = 0; /* did an error occur? */ 593 594 /* asconf param buffer */ 595 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 596 struct sctp_asconf_ack *ack, *ack_next; 597 598 /* verify minimum length */ 599 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 600 SCTPDBG(SCTP_DEBUG_ASCONF1, 601 "handle_asconf: chunk too small = %xh\n", 602 ntohs(cp->ch.chunk_length)); 603 return; 604 } 605 asoc = &stcb->asoc; 606 serial_num = ntohl(cp->serial_number); 607 608 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 609 /* got a duplicate ASCONF */ 610 SCTPDBG(SCTP_DEBUG_ASCONF1, 611 "handle_asconf: got duplicate serial number = %xh\n", 612 serial_num); 613 return; 614 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 615 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 616 serial_num, asoc->asconf_seq_in + 1); 617 return; 618 } 619 /* it's the expected "next" sequence number, so process it */ 620 asoc->asconf_seq_in = serial_num; /* update sequence */ 621 /* get length of all the param's in the ASCONF */ 622 asconf_limit = offset + ntohs(cp->ch.chunk_length); 623 SCTPDBG(SCTP_DEBUG_ASCONF1, 624 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 625 asconf_limit, serial_num); 626 627 if (first) { 628 /* delete old cache */ 629 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 630 631 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 632 if (ack->serial_number == serial_num) 633 break; 634 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 635 ack->serial_number, serial_num); 636 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 637 if (ack->data != NULL) { 638 sctp_m_freem(ack->data); 639 } 640 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 641 } 642 } 643 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 644 M_NOWAIT, 1, MT_DATA); 645 if (m_ack == NULL) { 646 SCTPDBG(SCTP_DEBUG_ASCONF1, 647 "handle_asconf: couldn't get mbuf!\n"); 648 return; 649 } 650 m_tail = m_ack; /* current reply chain's tail */ 651 652 /* fill in ASCONF-ACK header */ 653 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 654 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 655 ack_cp->ch.chunk_flags = 0; 656 ack_cp->serial_number = htonl(serial_num); 657 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 658 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 659 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 660 661 /* skip the lookup address parameter */ 662 offset += sizeof(struct sctp_asconf_chunk); 663 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); 664 if (p_addr == NULL) { 665 SCTPDBG(SCTP_DEBUG_ASCONF1, 666 "handle_asconf: couldn't get lookup addr!\n"); 667 /* respond with a missing/invalid mandatory parameter error */ 668 return; 669 } 670 /* param_length is already validated in process_control... */ 671 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 672 /* get pointer to first asconf param in ASCONF */ 673 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); 674 if (aph == NULL) { 675 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 676 goto send_reply; 677 } 678 /* process through all parameters */ 679 cnt = 0; 680 while (aph != NULL) { 681 unsigned int param_length, param_type; 682 683 param_type = ntohs(aph->ph.param_type); 684 param_length = ntohs(aph->ph.param_length); 685 if (offset + param_length > asconf_limit) { 686 /* parameter goes beyond end of chunk! */ 687 sctp_m_freem(m_ack); 688 return; 689 } 690 m_result = NULL; 691 692 if (param_length > sizeof(aparam_buf)) { 693 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 694 sctp_m_freem(m_ack); 695 return; 696 } 697 if (param_length <= sizeof(struct sctp_paramhdr)) { 698 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 699 sctp_m_freem(m_ack); 700 } 701 /* get the entire parameter */ 702 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 703 if (aph == NULL) { 704 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 705 sctp_m_freem(m_ack); 706 return; 707 } 708 switch (param_type) { 709 case SCTP_ADD_IP_ADDRESS: 710 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 711 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 712 cnt++; 713 break; 714 case SCTP_DEL_IP_ADDRESS: 715 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 716 error); 717 break; 718 case SCTP_ERROR_CAUSE_IND: 719 /* not valid in an ASCONF chunk */ 720 break; 721 case SCTP_SET_PRIM_ADDR: 722 m_result = sctp_process_asconf_set_primary(src, aph, 723 stcb, error); 724 break; 725 case SCTP_NAT_VTAGS: 726 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 727 break; 728 case SCTP_SUCCESS_REPORT: 729 /* not valid in an ASCONF chunk */ 730 break; 731 case SCTP_ULP_ADAPTATION: 732 /* FIX */ 733 break; 734 default: 735 if ((param_type & 0x8000) == 0) { 736 /* Been told to STOP at this param */ 737 asconf_limit = offset; 738 /* 739 * FIX FIX - We need to call 740 * sctp_arethere_unrecognized_parameters() 741 * to get a operr and send it for any 742 * param's with the 0x4000 bit set OR do it 743 * here ourselves... note we still must STOP 744 * if the 0x8000 bit is clear. 745 */ 746 } 747 /* unknown/invalid param type */ 748 break; 749 } /* switch */ 750 751 /* add any (error) result to the reply mbuf chain */ 752 if (m_result != NULL) { 753 SCTP_BUF_NEXT(m_tail) = m_result; 754 m_tail = m_result; 755 /* update lengths, make sure it's aligned too */ 756 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 757 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 758 /* set flag to force success reports */ 759 error = 1; 760 } 761 offset += SCTP_SIZE32(param_length); 762 /* update remaining ASCONF message length to process */ 763 if (offset >= asconf_limit) { 764 /* no more data in the mbuf chain */ 765 break; 766 } 767 /* get pointer to next asconf param */ 768 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 769 sizeof(struct sctp_asconf_paramhdr), 770 (uint8_t *)&aparam_buf); 771 if (aph == NULL) { 772 /* can't get an asconf paramhdr */ 773 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 774 /* FIX ME - add error here... */ 775 } 776 } 777 778 send_reply: 779 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 780 /* save the ASCONF-ACK reply */ 781 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 782 struct sctp_asconf_ack); 783 if (ack == NULL) { 784 sctp_m_freem(m_ack); 785 return; 786 } 787 ack->serial_number = serial_num; 788 ack->last_sent_to = NULL; 789 ack->data = m_ack; 790 ack->len = 0; 791 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 792 ack->len += SCTP_BUF_LEN(n); 793 } 794 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 795 796 /* see if last_control_chunk_from is set properly (use IP src addr) */ 797 if (stcb->asoc.last_control_chunk_from == NULL) { 798 /* 799 * this could happen if the source address was just newly 800 * added 801 */ 802 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 803 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 804 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 805 /* look up the from address */ 806 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 807 #ifdef SCTP_DEBUG 808 if (stcb->asoc.last_control_chunk_from == NULL) { 809 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 810 } 811 #endif 812 } 813 } 814 815 /* 816 * does the address match? returns 0 if not, 1 if so 817 */ 818 static uint32_t 819 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 820 { 821 switch (sa->sa_family) { 822 #ifdef INET6 823 case AF_INET6: 824 { 825 /* XXX scopeid */ 826 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 827 828 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 829 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 830 sizeof(struct in6_addr)) == 0)) { 831 return (1); 832 } 833 break; 834 } 835 #endif 836 #ifdef INET 837 case AF_INET: 838 { 839 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 840 841 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 842 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 843 sizeof(struct in_addr)) == 0)) { 844 return (1); 845 } 846 break; 847 } 848 #endif 849 default: 850 break; 851 } 852 return (0); 853 } 854 855 /* 856 * does the address match? returns 0 if not, 1 if so 857 */ 858 static uint32_t 859 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 860 { 861 #if defined(INET) || defined(INET6) 862 uint16_t param_type, param_length; 863 864 param_type = ntohs(ph->param_type); 865 param_length = ntohs(ph->param_length); 866 #endif 867 switch (sa->sa_family) { 868 #ifdef INET6 869 case AF_INET6: 870 { 871 /* XXX scopeid */ 872 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 873 struct sctp_ipv6addr_param *v6addr; 874 875 v6addr = (struct sctp_ipv6addr_param *)ph; 876 if ((param_type == SCTP_IPV6_ADDRESS) && 877 (param_length == sizeof(struct sctp_ipv6addr_param)) && 878 (memcmp(&v6addr->addr, &sin6->sin6_addr, 879 sizeof(struct in6_addr)) == 0)) { 880 return (1); 881 } 882 break; 883 } 884 #endif 885 #ifdef INET 886 case AF_INET: 887 { 888 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 889 struct sctp_ipv4addr_param *v4addr; 890 891 v4addr = (struct sctp_ipv4addr_param *)ph; 892 if ((param_type == SCTP_IPV4_ADDRESS) && 893 (param_length == sizeof(struct sctp_ipv4addr_param)) && 894 (memcmp(&v4addr->addr, &sin->sin_addr, 895 sizeof(struct in_addr)) == 0)) { 896 return (1); 897 } 898 break; 899 } 900 #endif 901 default: 902 break; 903 } 904 return (0); 905 } 906 907 /* 908 * Cleanup for non-responded/OP ERR'd ASCONF 909 */ 910 void 911 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 912 { 913 /* 914 * clear out any existing asconfs going out 915 */ 916 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 917 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 918 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 919 /* remove the old ASCONF on our outbound queue */ 920 sctp_toss_old_asconf(stcb); 921 } 922 923 /* 924 * cleanup any cached source addresses that may be topologically 925 * incorrect after a new address has been added to this interface. 926 */ 927 static void 928 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 929 { 930 struct sctp_nets *net; 931 932 /* 933 * Ideally, we want to only clear cached routes and source addresses 934 * that are topologically incorrect. But since there is no easy way 935 * to know whether the newly added address on the ifn would cause a 936 * routing change (i.e. a new egress interface would be chosen) 937 * without doing a new routing lookup and source address selection, 938 * we will (for now) just flush any cached route using a different 939 * ifn (and cached source addrs) and let output re-choose them 940 * during the next send on that net. 941 */ 942 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 943 /* 944 * clear any cached route (and cached source address) if the 945 * route's interface is NOT the same as the address change. 946 * If it's the same interface, just clear the cached source 947 * address. 948 */ 949 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 950 ((ifn == NULL) || 951 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 952 /* clear any cached route */ 953 RTFREE(net->ro.ro_rt); 954 net->ro.ro_rt = NULL; 955 } 956 /* clear any cached source address */ 957 if (net->src_addr_selected) { 958 sctp_free_ifa(net->ro._s_addr); 959 net->ro._s_addr = NULL; 960 net->src_addr_selected = 0; 961 } 962 } 963 } 964 965 966 void 967 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 968 { 969 int error; 970 971 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 972 return; 973 } 974 if (stcb->asoc.deleted_primary == NULL) { 975 return; 976 } 977 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 978 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 979 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 980 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 981 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 982 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 983 stcb->asoc.deleted_primary, 984 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 985 stcb->asoc.num_send_timers_up--; 986 if (stcb->asoc.num_send_timers_up < 0) { 987 stcb->asoc.num_send_timers_up = 0; 988 } 989 SCTP_TCB_LOCK_ASSERT(stcb); 990 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 991 stcb->asoc.deleted_primary); 992 if (error) { 993 SCTP_INP_DECR_REF(stcb->sctp_ep); 994 return; 995 } 996 SCTP_TCB_LOCK_ASSERT(stcb); 997 #ifdef SCTP_AUDITING_ENABLED 998 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 999 #endif 1000 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1001 if ((stcb->asoc.num_send_timers_up == 0) && 1002 (stcb->asoc.sent_queue_cnt > 0)) { 1003 struct sctp_tmit_chunk *chk; 1004 1005 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1006 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1007 stcb, chk->whoTo); 1008 } 1009 } 1010 return; 1011 } 1012 1013 static int 1014 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1015 1016 void 1017 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1018 { 1019 struct sctp_tmit_chunk *chk; 1020 1021 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1022 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1023 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4); 1024 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1025 net->error_count = 0; 1026 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1027 if (chk->whoTo == net) { 1028 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1029 chk->sent = SCTP_DATAGRAM_RESEND; 1030 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1031 sctp_flight_size_decrease(chk); 1032 sctp_total_flight_decrease(stcb, chk); 1033 net->marked_retrans++; 1034 stcb->asoc.marked_retrans++; 1035 } 1036 } 1037 } 1038 if (net->marked_retrans) { 1039 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1040 } 1041 } 1042 1043 static void 1044 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1045 { 1046 struct sctp_nets *net; 1047 int addrnum, changed; 1048 1049 /* 1050 * If number of local valid addresses is 1, the valid address is 1051 * probably newly added address. Several valid addresses in this 1052 * association. A source address may not be changed. Additionally, 1053 * they can be configured on a same interface as "alias" addresses. 1054 * (by micchie) 1055 */ 1056 addrnum = sctp_local_addr_count(stcb); 1057 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1058 addrnum); 1059 if (addrnum == 1) { 1060 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1061 /* clear any cached route and source address */ 1062 if (net->ro.ro_rt) { 1063 RTFREE(net->ro.ro_rt); 1064 net->ro.ro_rt = NULL; 1065 } 1066 if (net->src_addr_selected) { 1067 sctp_free_ifa(net->ro._s_addr); 1068 net->ro._s_addr = NULL; 1069 net->src_addr_selected = 0; 1070 } 1071 /* Retransmit unacknowledged DATA chunks immediately */ 1072 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1073 SCTP_MOBILITY_FASTHANDOFF)) { 1074 sctp_net_immediate_retrans(stcb, net); 1075 } 1076 /* also, SET PRIMARY is maybe already sent */ 1077 } 1078 return; 1079 } 1080 /* Multiple local addresses exsist in the association. */ 1081 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1082 /* clear any cached route and source address */ 1083 if (net->ro.ro_rt) { 1084 RTFREE(net->ro.ro_rt); 1085 net->ro.ro_rt = NULL; 1086 } 1087 if (net->src_addr_selected) { 1088 sctp_free_ifa(net->ro._s_addr); 1089 net->ro._s_addr = NULL; 1090 net->src_addr_selected = 0; 1091 } 1092 /* 1093 * Check if the nexthop is corresponding to the new address. 1094 * If the new address is corresponding to the current 1095 * nexthop, the path will be changed. If the new address is 1096 * NOT corresponding to the current nexthop, the path will 1097 * not be changed. 1098 */ 1099 SCTP_RTALLOC((sctp_route_t *)&net->ro, 1100 stcb->sctp_ep->def_vrf_id, 1101 stcb->sctp_ep->fibnum); 1102 if (net->ro.ro_rt == NULL) 1103 continue; 1104 1105 changed = 0; 1106 switch (net->ro._l_addr.sa.sa_family) { 1107 #ifdef INET 1108 case AF_INET: 1109 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) { 1110 changed = 1; 1111 } 1112 break; 1113 #endif 1114 #ifdef INET6 1115 case AF_INET6: 1116 if (sctp_v6src_match_nexthop( 1117 &newifa->address.sin6, (sctp_route_t *)&net->ro)) { 1118 changed = 1; 1119 } 1120 break; 1121 #endif 1122 default: 1123 break; 1124 } 1125 /* 1126 * if the newly added address does not relate routing 1127 * information, we skip. 1128 */ 1129 if (changed == 0) 1130 continue; 1131 /* Retransmit unacknowledged DATA chunks immediately */ 1132 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1133 SCTP_MOBILITY_FASTHANDOFF)) { 1134 sctp_net_immediate_retrans(stcb, net); 1135 } 1136 /* Send SET PRIMARY for this new address */ 1137 if (net == stcb->asoc.primary_destination) { 1138 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1139 SCTP_SET_PRIM_ADDR); 1140 } 1141 } 1142 } 1143 1144 /* 1145 * process an ADD/DELETE IP ack from peer. 1146 * addr: corresponding sctp_ifa to the address being added/deleted. 1147 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1148 * flag: 1=success, 0=failure. 1149 */ 1150 static void 1151 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1152 { 1153 /* 1154 * do the necessary asoc list work- if we get a failure indication, 1155 * leave the address on the assoc's restricted list. If we get a 1156 * success indication, remove the address from the restricted list. 1157 */ 1158 /* 1159 * Note: this will only occur for ADD_IP_ADDRESS, since 1160 * DEL_IP_ADDRESS is never actually added to the list... 1161 */ 1162 if (flag) { 1163 /* success case, so remove from the restricted list */ 1164 sctp_del_local_addr_restricted(stcb, addr); 1165 1166 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1167 SCTP_MOBILITY_BASE) || 1168 sctp_is_mobility_feature_on(stcb->sctp_ep, 1169 SCTP_MOBILITY_FASTHANDOFF)) { 1170 sctp_path_check_and_react(stcb, addr); 1171 return; 1172 } 1173 /* clear any cached/topologically incorrect source addresses */ 1174 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1175 } 1176 /* else, leave it on the list */ 1177 } 1178 1179 /* 1180 * add an asconf add/delete/set primary IP address parameter to the queue. 1181 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1182 * returns 0 if queued, -1 if not queued/removed. 1183 * NOTE: if adding, but a delete for the same address is already scheduled 1184 * (and not yet sent out), simply remove it from queue. Same for deleting 1185 * an address already scheduled for add. If a duplicate operation is found, 1186 * ignore the new one. 1187 */ 1188 static int 1189 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1190 uint16_t type) 1191 { 1192 struct sctp_asconf_addr *aa, *aa_next; 1193 1194 /* make sure the request isn't already in the queue */ 1195 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1196 /* address match? */ 1197 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1198 continue; 1199 /* 1200 * is the request already in queue but not sent? pass the 1201 * request already sent in order to resolve the following 1202 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1203 * can't remove the ADD request already sent 3. arrival of 1204 * ADD 1205 */ 1206 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1207 return (-1); 1208 } 1209 /* is the negative request already in queue, and not sent */ 1210 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1211 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1212 /* add requested, delete already queued */ 1213 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1214 /* remove the ifa from the restricted list */ 1215 sctp_del_local_addr_restricted(stcb, ifa); 1216 /* free the asconf param */ 1217 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1218 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1219 return (-1); 1220 } 1221 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1222 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1223 /* delete requested, add already queued */ 1224 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1225 /* remove the aa->ifa from the restricted list */ 1226 sctp_del_local_addr_restricted(stcb, aa->ifa); 1227 /* free the asconf param */ 1228 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1229 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1230 return (-1); 1231 } 1232 } /* for each aa */ 1233 1234 /* adding new request to the queue */ 1235 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1236 SCTP_M_ASC_ADDR); 1237 if (aa == NULL) { 1238 /* didn't get memory */ 1239 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1240 return (-1); 1241 } 1242 aa->special_del = 0; 1243 /* fill in asconf address parameter fields */ 1244 /* top level elements are "networked" during send */ 1245 aa->ap.aph.ph.param_type = type; 1246 aa->ifa = ifa; 1247 atomic_add_int(&ifa->refcount, 1); 1248 /* correlation_id filled in during send routine later... */ 1249 switch (ifa->address.sa.sa_family) { 1250 #ifdef INET6 1251 case AF_INET6: 1252 { 1253 struct sockaddr_in6 *sin6; 1254 1255 sin6 = &ifa->address.sin6; 1256 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1257 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1258 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1259 sizeof(struct sctp_ipv6addr_param); 1260 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1261 sizeof(struct in6_addr)); 1262 break; 1263 } 1264 #endif 1265 #ifdef INET 1266 case AF_INET: 1267 { 1268 struct sockaddr_in *sin; 1269 1270 sin = &ifa->address.sin; 1271 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1272 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1273 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1274 sizeof(struct sctp_ipv4addr_param); 1275 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1276 sizeof(struct in_addr)); 1277 break; 1278 } 1279 #endif 1280 default: 1281 /* invalid family! */ 1282 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1283 sctp_free_ifa(ifa); 1284 return (-1); 1285 } 1286 aa->sent = 0; /* clear sent flag */ 1287 1288 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1289 #ifdef SCTP_DEBUG 1290 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1291 if (type == SCTP_ADD_IP_ADDRESS) { 1292 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1293 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1294 } else if (type == SCTP_DEL_IP_ADDRESS) { 1295 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1296 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1297 } else { 1298 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1299 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1300 } 1301 } 1302 #endif 1303 1304 return (0); 1305 } 1306 1307 1308 /* 1309 * add an asconf operation for the given ifa and type. 1310 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1311 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1312 * advisable. 1313 */ 1314 static int 1315 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1316 uint16_t type) 1317 { 1318 uint32_t status; 1319 int pending_delete_queued = 0; 1320 int last; 1321 1322 /* see if peer supports ASCONF */ 1323 if (stcb->asoc.asconf_supported == 0) { 1324 return (-1); 1325 } 1326 /* 1327 * if this is deleting the last address from the assoc, mark it as 1328 * pending. 1329 */ 1330 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { 1331 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1332 last = (sctp_local_addr_count(stcb) == 0); 1333 } else { 1334 last = (sctp_local_addr_count(stcb) == 1); 1335 } 1336 if (last) { 1337 /* set the pending delete info only */ 1338 stcb->asoc.asconf_del_pending = 1; 1339 stcb->asoc.asconf_addr_del_pending = ifa; 1340 atomic_add_int(&ifa->refcount, 1); 1341 SCTPDBG(SCTP_DEBUG_ASCONF2, 1342 "asconf_queue_add: mark delete last address pending\n"); 1343 return (-1); 1344 } 1345 } 1346 /* queue an asconf parameter */ 1347 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1348 1349 /* 1350 * if this is an add, and there is a delete also pending (i.e. the 1351 * last local address is being changed), queue the pending delete 1352 * too. 1353 */ 1354 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1355 /* queue in the pending delete */ 1356 if (sctp_asconf_queue_mgmt(stcb, 1357 stcb->asoc.asconf_addr_del_pending, 1358 SCTP_DEL_IP_ADDRESS) == 0) { 1359 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1360 pending_delete_queued = 1; 1361 /* clear out the pending delete info */ 1362 stcb->asoc.asconf_del_pending = 0; 1363 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1364 stcb->asoc.asconf_addr_del_pending = NULL; 1365 } 1366 } 1367 if (pending_delete_queued) { 1368 struct sctp_nets *net; 1369 1370 /* 1371 * since we know that the only/last address is now being 1372 * changed in this case, reset the cwnd/rto on all nets to 1373 * start as a new address and path. Also clear the error 1374 * counts to give the assoc the best chance to complete the 1375 * address change. 1376 */ 1377 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1378 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1379 net); 1380 net->RTO = 0; 1381 net->error_count = 0; 1382 } 1383 stcb->asoc.overall_error_count = 0; 1384 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1385 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1386 stcb->asoc.overall_error_count, 1387 0, 1388 SCTP_FROM_SCTP_ASCONF, 1389 __LINE__); 1390 } 1391 /* queue in an advisory set primary too */ 1392 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1393 /* let caller know we should send this out immediately */ 1394 status = 1; 1395 } 1396 return (status); 1397 } 1398 1399 /*- 1400 * add an asconf delete IP address parameter to the queue by sockaddr and 1401 * possibly with no sctp_ifa available. This is only called by the routine 1402 * that checks the addresses in an INIT-ACK against the current address list. 1403 * returns 0 if completed, non-zero if not completed. 1404 * NOTE: if an add is already scheduled (and not yet sent out), simply 1405 * remove it from queue. If a duplicate operation is found, ignore the 1406 * new one. 1407 */ 1408 static int 1409 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1410 { 1411 struct sctp_ifa *ifa; 1412 struct sctp_asconf_addr *aa, *aa_next; 1413 1414 if (stcb == NULL) { 1415 return (-1); 1416 } 1417 /* see if peer supports ASCONF */ 1418 if (stcb->asoc.asconf_supported == 0) { 1419 return (-1); 1420 } 1421 /* make sure the request isn't already in the queue */ 1422 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1423 /* address match? */ 1424 if (sctp_asconf_addr_match(aa, sa) == 0) 1425 continue; 1426 /* is the request already in queue (sent or not) */ 1427 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1428 return (-1); 1429 } 1430 /* is the negative request already in queue, and not sent */ 1431 if (aa->sent == 1) 1432 continue; 1433 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1434 /* add already queued, so remove existing entry */ 1435 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1436 sctp_del_local_addr_restricted(stcb, aa->ifa); 1437 /* free the entry */ 1438 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1439 return (-1); 1440 } 1441 } /* for each aa */ 1442 1443 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1444 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1445 1446 /* adding new request to the queue */ 1447 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1448 SCTP_M_ASC_ADDR); 1449 if (aa == NULL) { 1450 /* didn't get memory */ 1451 SCTPDBG(SCTP_DEBUG_ASCONF1, 1452 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1453 return (-1); 1454 } 1455 aa->special_del = 0; 1456 /* fill in asconf address parameter fields */ 1457 /* top level elements are "networked" during send */ 1458 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1459 aa->ifa = ifa; 1460 if (ifa) 1461 atomic_add_int(&ifa->refcount, 1); 1462 /* correlation_id filled in during send routine later... */ 1463 switch (sa->sa_family) { 1464 #ifdef INET6 1465 case AF_INET6: 1466 { 1467 /* IPv6 address */ 1468 struct sockaddr_in6 *sin6; 1469 1470 sin6 = (struct sockaddr_in6 *)sa; 1471 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1472 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1473 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1474 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1475 sizeof(struct in6_addr)); 1476 break; 1477 } 1478 #endif 1479 #ifdef INET 1480 case AF_INET: 1481 { 1482 /* IPv4 address */ 1483 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1484 1485 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1486 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1487 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1488 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1489 sizeof(struct in_addr)); 1490 break; 1491 } 1492 #endif 1493 default: 1494 /* invalid family! */ 1495 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1496 if (ifa) 1497 sctp_free_ifa(ifa); 1498 return (-1); 1499 } 1500 aa->sent = 0; /* clear sent flag */ 1501 1502 /* delete goes to the back of the queue */ 1503 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1504 1505 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1506 return (0); 1507 } 1508 1509 /* 1510 * find a specific asconf param on our "sent" queue 1511 */ 1512 static struct sctp_asconf_addr * 1513 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1514 { 1515 struct sctp_asconf_addr *aa; 1516 1517 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1518 if (aa->ap.aph.correlation_id == correlation_id && 1519 aa->sent == 1) { 1520 /* found it */ 1521 return (aa); 1522 } 1523 } 1524 /* didn't find it */ 1525 return (NULL); 1526 } 1527 1528 /* 1529 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1530 * notifications based on the error response 1531 */ 1532 static void 1533 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1534 struct sctp_asconf_paramhdr *aph) 1535 { 1536 struct sctp_error_cause *eh; 1537 struct sctp_paramhdr *ph; 1538 uint16_t param_type; 1539 uint16_t error_code; 1540 1541 eh = (struct sctp_error_cause *)(aph + 1); 1542 ph = (struct sctp_paramhdr *)(eh + 1); 1543 /* validate lengths */ 1544 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1545 htons(aph->ph.param_length)) { 1546 /* invalid error cause length */ 1547 SCTPDBG(SCTP_DEBUG_ASCONF1, 1548 "asconf_process_error: cause element too long\n"); 1549 return; 1550 } 1551 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1552 htons(eh->length)) { 1553 /* invalid included TLV length */ 1554 SCTPDBG(SCTP_DEBUG_ASCONF1, 1555 "asconf_process_error: included TLV too long\n"); 1556 return; 1557 } 1558 /* which error code ? */ 1559 error_code = ntohs(eh->code); 1560 param_type = ntohs(aph->ph.param_type); 1561 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1562 switch (error_code) { 1563 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1564 /* we allow ourselves to "try again" for this error */ 1565 break; 1566 default: 1567 /* peer can't handle it... */ 1568 switch (param_type) { 1569 case SCTP_ADD_IP_ADDRESS: 1570 case SCTP_DEL_IP_ADDRESS: 1571 case SCTP_SET_PRIM_ADDR: 1572 break; 1573 default: 1574 break; 1575 } 1576 } 1577 } 1578 1579 /* 1580 * process an asconf queue param. 1581 * aparam: parameter to process, will be removed from the queue. 1582 * flag: 1=success case, 0=failure case 1583 */ 1584 static void 1585 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1586 struct sctp_asconf_addr *aparam, uint32_t flag) 1587 { 1588 uint16_t param_type; 1589 1590 /* process this param */ 1591 param_type = aparam->ap.aph.ph.param_type; 1592 switch (param_type) { 1593 case SCTP_ADD_IP_ADDRESS: 1594 SCTPDBG(SCTP_DEBUG_ASCONF1, 1595 "process_param_ack: added IP address\n"); 1596 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1597 break; 1598 case SCTP_DEL_IP_ADDRESS: 1599 SCTPDBG(SCTP_DEBUG_ASCONF1, 1600 "process_param_ack: deleted IP address\n"); 1601 /* nothing really to do... lists already updated */ 1602 break; 1603 case SCTP_SET_PRIM_ADDR: 1604 SCTPDBG(SCTP_DEBUG_ASCONF1, 1605 "process_param_ack: set primary IP address\n"); 1606 /* nothing to do... peer may start using this addr */ 1607 break; 1608 default: 1609 /* should NEVER happen */ 1610 break; 1611 } 1612 1613 /* remove the param and free it */ 1614 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1615 if (aparam->ifa) 1616 sctp_free_ifa(aparam->ifa); 1617 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1618 } 1619 1620 /* 1621 * cleanup from a bad asconf ack parameter 1622 */ 1623 static void 1624 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1625 { 1626 /* assume peer doesn't really know how to do asconfs */ 1627 /* XXX we could free the pending queue here */ 1628 1629 } 1630 1631 void 1632 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1633 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1634 struct sctp_nets *net, int *abort_no_unlock) 1635 { 1636 struct sctp_association *asoc; 1637 uint32_t serial_num; 1638 uint16_t ack_length; 1639 struct sctp_asconf_paramhdr *aph; 1640 struct sctp_asconf_addr *aa, *aa_next; 1641 uint32_t last_error_id = 0; /* last error correlation id */ 1642 uint32_t id; 1643 struct sctp_asconf_addr *ap; 1644 1645 /* asconf param buffer */ 1646 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1647 1648 /* verify minimum length */ 1649 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1650 SCTPDBG(SCTP_DEBUG_ASCONF1, 1651 "handle_asconf_ack: chunk too small = %xh\n", 1652 ntohs(cp->ch.chunk_length)); 1653 return; 1654 } 1655 asoc = &stcb->asoc; 1656 serial_num = ntohl(cp->serial_number); 1657 1658 /* 1659 * NOTE: we may want to handle this differently- currently, we will 1660 * abort when we get an ack for the expected serial number + 1 (eg. 1661 * we didn't send it), process an ack normally if it is the expected 1662 * serial number, and re-send the previous ack for *ALL* other 1663 * serial numbers 1664 */ 1665 1666 /* 1667 * if the serial number is the next expected, but I didn't send it, 1668 * abort the asoc, since someone probably just hijacked us... 1669 */ 1670 if (serial_num == (asoc->asconf_seq_out + 1)) { 1671 struct mbuf *op_err; 1672 char msg[SCTP_DIAG_INFO_LEN]; 1673 1674 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1675 snprintf(msg, sizeof(msg), "Never sent serial number %8.8x", 1676 serial_num); 1677 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg); 1678 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); 1679 *abort_no_unlock = 1; 1680 return; 1681 } 1682 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1683 /* got a duplicate/unexpected ASCONF-ACK */ 1684 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1685 serial_num, asoc->asconf_seq_out_acked + 1); 1686 return; 1687 } 1688 if (serial_num == asoc->asconf_seq_out - 1) { 1689 /* stop our timer */ 1690 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1691 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1692 } 1693 /* process the ASCONF-ACK contents */ 1694 ack_length = ntohs(cp->ch.chunk_length) - 1695 sizeof(struct sctp_asconf_ack_chunk); 1696 offset += sizeof(struct sctp_asconf_ack_chunk); 1697 /* process through all parameters */ 1698 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1699 unsigned int param_length, param_type; 1700 1701 /* get pointer to next asconf parameter */ 1702 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1703 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1704 if (aph == NULL) { 1705 /* can't get an asconf paramhdr */ 1706 sctp_asconf_ack_clear(stcb); 1707 return; 1708 } 1709 param_type = ntohs(aph->ph.param_type); 1710 param_length = ntohs(aph->ph.param_length); 1711 if (param_length > ack_length) { 1712 sctp_asconf_ack_clear(stcb); 1713 return; 1714 } 1715 if (param_length < sizeof(struct sctp_paramhdr)) { 1716 sctp_asconf_ack_clear(stcb); 1717 return; 1718 } 1719 /* get the complete parameter... */ 1720 if (param_length > sizeof(aparam_buf)) { 1721 SCTPDBG(SCTP_DEBUG_ASCONF1, 1722 "param length (%u) larger than buffer size!\n", param_length); 1723 sctp_asconf_ack_clear(stcb); 1724 return; 1725 } 1726 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1727 if (aph == NULL) { 1728 sctp_asconf_ack_clear(stcb); 1729 return; 1730 } 1731 /* correlation_id is transparent to peer, no ntohl needed */ 1732 id = aph->correlation_id; 1733 1734 switch (param_type) { 1735 case SCTP_ERROR_CAUSE_IND: 1736 last_error_id = id; 1737 /* find the corresponding asconf param in our queue */ 1738 ap = sctp_asconf_find_param(stcb, id); 1739 if (ap == NULL) { 1740 /* hmm... can't find this in our queue! */ 1741 break; 1742 } 1743 /* process the parameter, failed flag */ 1744 sctp_asconf_process_param_ack(stcb, ap, 0); 1745 /* process the error response */ 1746 sctp_asconf_process_error(stcb, aph); 1747 break; 1748 case SCTP_SUCCESS_REPORT: 1749 /* find the corresponding asconf param in our queue */ 1750 ap = sctp_asconf_find_param(stcb, id); 1751 if (ap == NULL) { 1752 /* hmm... can't find this in our queue! */ 1753 break; 1754 } 1755 /* process the parameter, success flag */ 1756 sctp_asconf_process_param_ack(stcb, ap, 1); 1757 break; 1758 default: 1759 break; 1760 } /* switch */ 1761 1762 /* update remaining ASCONF-ACK message length to process */ 1763 ack_length -= SCTP_SIZE32(param_length); 1764 if (ack_length <= 0) { 1765 /* no more data in the mbuf chain */ 1766 break; 1767 } 1768 offset += SCTP_SIZE32(param_length); 1769 } /* while */ 1770 1771 /* 1772 * if there are any "sent" params still on the queue, these are 1773 * implicitly "success", or "failed" (if we got an error back) ... 1774 * so process these appropriately 1775 * 1776 * we assume that the correlation_id's are monotonically increasing 1777 * beginning from 1 and that we don't have *that* many outstanding 1778 * at any given time 1779 */ 1780 if (last_error_id == 0) 1781 last_error_id--;/* set to "max" value */ 1782 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1783 if (aa->sent == 1) { 1784 /* 1785 * implicitly successful or failed if correlation_id 1786 * < last_error_id, then success else, failure 1787 */ 1788 if (aa->ap.aph.correlation_id < last_error_id) 1789 sctp_asconf_process_param_ack(stcb, aa, 1); 1790 else 1791 sctp_asconf_process_param_ack(stcb, aa, 0); 1792 } else { 1793 /* 1794 * since we always process in order (FIFO queue) if 1795 * we reach one that hasn't been sent, the rest 1796 * should not have been sent either. so, we're 1797 * done... 1798 */ 1799 break; 1800 } 1801 } 1802 1803 /* update the next sequence number to use */ 1804 asoc->asconf_seq_out_acked++; 1805 /* remove the old ASCONF on our outbound queue */ 1806 sctp_toss_old_asconf(stcb); 1807 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1808 #ifdef SCTP_TIMER_BASED_ASCONF 1809 /* we have more params, so restart our timer */ 1810 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1811 stcb, net); 1812 #else 1813 /* we have more params, so send out more */ 1814 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1815 #endif 1816 } 1817 } 1818 1819 #ifdef INET6 1820 static uint32_t 1821 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1822 { 1823 struct sockaddr_in6 *sin6, *net6; 1824 struct sctp_nets *net; 1825 1826 if (sa->sa_family != AF_INET6) { 1827 /* wrong family */ 1828 return (0); 1829 } 1830 sin6 = (struct sockaddr_in6 *)sa; 1831 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1832 /* not link local address */ 1833 return (0); 1834 } 1835 /* hunt through our destination nets list for this scope_id */ 1836 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1837 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1838 AF_INET6) 1839 continue; 1840 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1841 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1842 continue; 1843 if (sctp_is_same_scope(sin6, net6)) { 1844 /* found one */ 1845 return (1); 1846 } 1847 } 1848 /* didn't find one */ 1849 return (0); 1850 } 1851 #endif 1852 1853 /* 1854 * address management functions 1855 */ 1856 static void 1857 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1858 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1859 { 1860 int status; 1861 1862 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1863 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1864 /* subset bound, no ASCONF allowed case, so ignore */ 1865 return; 1866 } 1867 /* 1868 * note: we know this is not the subset bound, no ASCONF case eg. 1869 * this is boundall or subset bound w/ASCONF allowed 1870 */ 1871 1872 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1873 switch (ifa->address.sa.sa_family) { 1874 #ifdef INET6 1875 case AF_INET6: 1876 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1877 &ifa->address.sin6.sin6_addr) != 0) { 1878 return; 1879 } 1880 break; 1881 #endif 1882 #ifdef INET 1883 case AF_INET: 1884 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1885 &ifa->address.sin.sin_addr) != 0) { 1886 return; 1887 } 1888 break; 1889 #endif 1890 default: 1891 return; 1892 } 1893 #ifdef INET6 1894 /* make sure we're "allowed" to add this type of addr */ 1895 if (ifa->address.sa.sa_family == AF_INET6) { 1896 /* invalid if we're not a v6 endpoint */ 1897 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1898 return; 1899 /* is the v6 addr really valid ? */ 1900 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1901 return; 1902 } 1903 } 1904 #endif 1905 /* put this address on the "pending/do not use yet" list */ 1906 sctp_add_local_addr_restricted(stcb, ifa); 1907 /* 1908 * check address scope if address is out of scope, don't queue 1909 * anything... note: this would leave the address on both inp and 1910 * asoc lists 1911 */ 1912 switch (ifa->address.sa.sa_family) { 1913 #ifdef INET6 1914 case AF_INET6: 1915 { 1916 struct sockaddr_in6 *sin6; 1917 1918 sin6 = &ifa->address.sin6; 1919 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1920 /* we skip unspecifed addresses */ 1921 return; 1922 } 1923 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1924 if (stcb->asoc.scope.local_scope == 0) { 1925 return; 1926 } 1927 /* is it the right link local scope? */ 1928 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1929 return; 1930 } 1931 } 1932 if (stcb->asoc.scope.site_scope == 0 && 1933 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1934 return; 1935 } 1936 break; 1937 } 1938 #endif 1939 #ifdef INET 1940 case AF_INET: 1941 { 1942 struct sockaddr_in *sin; 1943 struct in6pcb *inp6; 1944 1945 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1946 /* invalid if we are a v6 only endpoint */ 1947 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1948 SCTP_IPV6_V6ONLY(inp6)) 1949 return; 1950 1951 sin = &ifa->address.sin; 1952 if (sin->sin_addr.s_addr == 0) { 1953 /* we skip unspecifed addresses */ 1954 return; 1955 } 1956 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1957 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1958 return; 1959 } 1960 break; 1961 } 1962 #endif 1963 default: 1964 /* else, not AF_INET or AF_INET6, so skip */ 1965 return; 1966 } 1967 1968 /* queue an asconf for this address add/delete */ 1969 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1970 /* does the peer do asconf? */ 1971 if (stcb->asoc.asconf_supported) { 1972 /* queue an asconf for this addr */ 1973 status = sctp_asconf_queue_add(stcb, ifa, type); 1974 1975 /* 1976 * if queued ok, and in the open state, send out the 1977 * ASCONF. If in the non-open state, these will be 1978 * sent when the state goes open. 1979 */ 1980 if (status == 0 && 1981 ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 1982 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 1983 #ifdef SCTP_TIMER_BASED_ASCONF 1984 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1985 stcb, stcb->asoc.primary_destination); 1986 #else 1987 sctp_send_asconf(stcb, NULL, addr_locked); 1988 #endif 1989 } 1990 } 1991 } 1992 } 1993 1994 1995 int 1996 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 1997 { 1998 struct sctp_asconf_iterator *asc; 1999 struct sctp_ifa *ifa; 2000 struct sctp_laddr *l; 2001 int cnt_invalid = 0; 2002 2003 asc = (struct sctp_asconf_iterator *)ptr; 2004 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2005 ifa = l->ifa; 2006 switch (ifa->address.sa.sa_family) { 2007 #ifdef INET6 2008 case AF_INET6: 2009 /* invalid if we're not a v6 endpoint */ 2010 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2011 cnt_invalid++; 2012 if (asc->cnt == cnt_invalid) 2013 return (1); 2014 } 2015 break; 2016 #endif 2017 #ifdef INET 2018 case AF_INET: 2019 { 2020 /* invalid if we are a v6 only endpoint */ 2021 struct in6pcb *inp6; 2022 2023 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2024 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2025 SCTP_IPV6_V6ONLY(inp6)) { 2026 cnt_invalid++; 2027 if (asc->cnt == cnt_invalid) 2028 return (1); 2029 } 2030 break; 2031 } 2032 #endif 2033 default: 2034 /* invalid address family */ 2035 cnt_invalid++; 2036 if (asc->cnt == cnt_invalid) 2037 return (1); 2038 } 2039 } 2040 return (0); 2041 } 2042 2043 static int 2044 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2045 { 2046 struct sctp_ifa *ifa; 2047 struct sctp_asconf_iterator *asc; 2048 struct sctp_laddr *laddr, *nladdr, *l; 2049 2050 /* Only for specific case not bound all */ 2051 asc = (struct sctp_asconf_iterator *)ptr; 2052 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2053 ifa = l->ifa; 2054 if (l->action == SCTP_ADD_IP_ADDRESS) { 2055 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2056 sctp_nxt_addr) { 2057 if (laddr->ifa == ifa) { 2058 laddr->action = 0; 2059 break; 2060 } 2061 } 2062 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2063 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2064 /* remove only after all guys are done */ 2065 if (laddr->ifa == ifa) { 2066 sctp_del_local_addr_ep(inp, ifa); 2067 } 2068 } 2069 } 2070 } 2071 return (0); 2072 } 2073 2074 void 2075 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2076 void *ptr, uint32_t val SCTP_UNUSED) 2077 { 2078 struct sctp_asconf_iterator *asc; 2079 struct sctp_ifa *ifa; 2080 struct sctp_laddr *l; 2081 int cnt_invalid = 0; 2082 int type, status; 2083 int num_queued = 0; 2084 2085 asc = (struct sctp_asconf_iterator *)ptr; 2086 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2087 ifa = l->ifa; 2088 type = l->action; 2089 2090 /* address's vrf_id must be the vrf_id of the assoc */ 2091 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2092 continue; 2093 } 2094 /* Same checks again for assoc */ 2095 switch (ifa->address.sa.sa_family) { 2096 #ifdef INET6 2097 case AF_INET6: 2098 { 2099 /* invalid if we're not a v6 endpoint */ 2100 struct sockaddr_in6 *sin6; 2101 2102 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2103 cnt_invalid++; 2104 if (asc->cnt == cnt_invalid) 2105 return; 2106 else 2107 continue; 2108 } 2109 sin6 = &ifa->address.sin6; 2110 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2111 /* we skip unspecifed addresses */ 2112 continue; 2113 } 2114 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2115 &sin6->sin6_addr) != 0) { 2116 continue; 2117 } 2118 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2119 if (stcb->asoc.scope.local_scope == 0) { 2120 continue; 2121 } 2122 /* is it the right link local scope? */ 2123 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2124 continue; 2125 } 2126 } 2127 break; 2128 } 2129 #endif 2130 #ifdef INET 2131 case AF_INET: 2132 { 2133 /* invalid if we are a v6 only endpoint */ 2134 struct in6pcb *inp6; 2135 struct sockaddr_in *sin; 2136 2137 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2138 /* invalid if we are a v6 only endpoint */ 2139 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2140 SCTP_IPV6_V6ONLY(inp6)) 2141 continue; 2142 2143 sin = &ifa->address.sin; 2144 if (sin->sin_addr.s_addr == 0) { 2145 /* we skip unspecifed addresses */ 2146 continue; 2147 } 2148 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2149 &sin->sin_addr) != 0) { 2150 continue; 2151 } 2152 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2153 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2154 continue; 2155 } 2156 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2157 SCTP_IPV6_V6ONLY(inp6)) { 2158 cnt_invalid++; 2159 if (asc->cnt == cnt_invalid) 2160 return; 2161 else 2162 continue; 2163 } 2164 break; 2165 } 2166 #endif 2167 default: 2168 /* invalid address family */ 2169 cnt_invalid++; 2170 if (asc->cnt == cnt_invalid) 2171 return; 2172 else 2173 continue; 2174 break; 2175 } 2176 2177 if (type == SCTP_ADD_IP_ADDRESS) { 2178 /* prevent this address from being used as a source */ 2179 sctp_add_local_addr_restricted(stcb, ifa); 2180 } else if (type == SCTP_DEL_IP_ADDRESS) { 2181 struct sctp_nets *net; 2182 2183 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2184 sctp_rtentry_t *rt; 2185 2186 /* delete this address if cached */ 2187 if (net->ro._s_addr == ifa) { 2188 sctp_free_ifa(net->ro._s_addr); 2189 net->ro._s_addr = NULL; 2190 net->src_addr_selected = 0; 2191 rt = net->ro.ro_rt; 2192 if (rt) { 2193 RTFREE(rt); 2194 net->ro.ro_rt = NULL; 2195 } 2196 /* 2197 * Now we deleted our src address, 2198 * should we not also now reset the 2199 * cwnd/rto to start as if its a new 2200 * address? 2201 */ 2202 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2203 net->RTO = 0; 2204 2205 } 2206 } 2207 } else if (type == SCTP_SET_PRIM_ADDR) { 2208 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2209 /* must validate the ifa is in the ep */ 2210 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2211 continue; 2212 } 2213 } else { 2214 /* Need to check scopes for this guy */ 2215 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2216 continue; 2217 } 2218 } 2219 } 2220 /* queue an asconf for this address add/delete */ 2221 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2222 stcb->asoc.asconf_supported == 1) { 2223 /* queue an asconf for this addr */ 2224 status = sctp_asconf_queue_add(stcb, ifa, type); 2225 /* 2226 * if queued ok, and in the open state, update the 2227 * count of queued params. If in the non-open 2228 * state, these get sent when the assoc goes open. 2229 */ 2230 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2231 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2232 if (status >= 0) { 2233 num_queued++; 2234 } 2235 } 2236 } 2237 } 2238 /* 2239 * If we have queued params in the open state, send out an ASCONF. 2240 */ 2241 if (num_queued > 0) { 2242 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2243 } 2244 } 2245 2246 void 2247 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2248 { 2249 struct sctp_asconf_iterator *asc; 2250 struct sctp_ifa *ifa; 2251 struct sctp_laddr *l, *nl; 2252 2253 asc = (struct sctp_asconf_iterator *)ptr; 2254 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2255 ifa = l->ifa; 2256 if (l->action == SCTP_ADD_IP_ADDRESS) { 2257 /* Clear the defer use flag */ 2258 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2259 } 2260 sctp_free_ifa(ifa); 2261 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2262 SCTP_DECR_LADDR_COUNT(); 2263 } 2264 SCTP_FREE(asc, SCTP_M_ASC_IT); 2265 } 2266 2267 /* 2268 * sa is the sockaddr to ask the peer to set primary to. 2269 * returns: 0 = completed, -1 = error 2270 */ 2271 int32_t 2272 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2273 { 2274 uint32_t vrf_id; 2275 struct sctp_ifa *ifa; 2276 2277 /* find the ifa for the desired set primary */ 2278 vrf_id = stcb->asoc.vrf_id; 2279 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2280 if (ifa == NULL) { 2281 /* Invalid address */ 2282 return (-1); 2283 } 2284 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2285 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2286 /* set primary queuing succeeded */ 2287 SCTPDBG(SCTP_DEBUG_ASCONF1, 2288 "set_primary_ip_address_sa: queued on tcb=%p, ", 2289 (void *)stcb); 2290 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2291 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 2292 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2293 #ifdef SCTP_TIMER_BASED_ASCONF 2294 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2295 stcb->sctp_ep, stcb, 2296 stcb->asoc.primary_destination); 2297 #else 2298 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2299 #endif 2300 } 2301 } else { 2302 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2303 (void *)stcb); 2304 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2305 return (-1); 2306 } 2307 return (0); 2308 } 2309 2310 int 2311 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2312 { 2313 struct sctp_tmit_chunk *chk, *nchk; 2314 unsigned int offset, asconf_limit; 2315 struct sctp_asconf_chunk *acp; 2316 struct sctp_asconf_paramhdr *aph; 2317 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2318 struct sctp_paramhdr *ph; 2319 int add_cnt, del_cnt; 2320 uint16_t last_param_type; 2321 2322 add_cnt = del_cnt = 0; 2323 last_param_type = 0; 2324 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2325 if (chk->data == NULL) { 2326 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2327 continue; 2328 } 2329 offset = 0; 2330 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2331 offset += sizeof(struct sctp_asconf_chunk); 2332 asconf_limit = ntohs(acp->ch.chunk_length); 2333 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2334 if (ph == NULL) { 2335 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2336 continue; 2337 } 2338 offset += ntohs(ph->param_length); 2339 2340 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2341 if (aph == NULL) { 2342 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2343 continue; 2344 } 2345 while (aph != NULL) { 2346 unsigned int param_length, param_type; 2347 2348 param_type = ntohs(aph->ph.param_type); 2349 param_length = ntohs(aph->ph.param_length); 2350 if (offset + param_length > asconf_limit) { 2351 /* parameter goes beyond end of chunk! */ 2352 break; 2353 } 2354 if (param_length > sizeof(aparam_buf)) { 2355 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2356 break; 2357 } 2358 if (param_length <= sizeof(struct sctp_paramhdr)) { 2359 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2360 break; 2361 } 2362 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2363 if (aph == NULL) { 2364 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2365 break; 2366 } 2367 ph = (struct sctp_paramhdr *)(aph + 1); 2368 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2369 switch (param_type) { 2370 case SCTP_ADD_IP_ADDRESS: 2371 add_cnt++; 2372 break; 2373 case SCTP_DEL_IP_ADDRESS: 2374 del_cnt++; 2375 break; 2376 default: 2377 break; 2378 } 2379 last_param_type = param_type; 2380 } 2381 offset += SCTP_SIZE32(param_length); 2382 if (offset >= asconf_limit) { 2383 /* no more data in the mbuf chain */ 2384 break; 2385 } 2386 /* get pointer to next asconf param */ 2387 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2388 } 2389 } 2390 2391 /* 2392 * we want to find the sequences which consist of ADD -> DEL -> ADD 2393 * or DEL -> ADD 2394 */ 2395 if (add_cnt > del_cnt || 2396 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2397 return (1); 2398 } 2399 return (0); 2400 } 2401 2402 static struct sockaddr * 2403 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2404 { 2405 struct sctp_vrf *vrf = NULL; 2406 struct sctp_ifn *sctp_ifn; 2407 struct sctp_ifa *sctp_ifa; 2408 2409 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2410 SCTP_IPI_ADDR_RLOCK(); 2411 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2412 if (vrf == NULL) { 2413 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2414 SCTP_IPI_ADDR_RUNLOCK(); 2415 return (NULL); 2416 } 2417 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2418 if (stcb->asoc.scope.loopback_scope == 0 && 2419 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2420 /* Skip if loopback_scope not set */ 2421 continue; 2422 } 2423 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2424 switch (sctp_ifa->address.sa.sa_family) { 2425 #ifdef INET 2426 case AF_INET: 2427 if (stcb->asoc.scope.ipv4_addr_legal) { 2428 struct sockaddr_in *sin; 2429 2430 sin = &sctp_ifa->address.sin; 2431 if (sin->sin_addr.s_addr == 0) { 2432 /* skip unspecifed addresses */ 2433 continue; 2434 } 2435 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2436 &sin->sin_addr) != 0) { 2437 continue; 2438 } 2439 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2440 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2441 continue; 2442 2443 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2444 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2445 continue; 2446 /* 2447 * found a valid local v4 address to 2448 * use 2449 */ 2450 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2451 SCTP_IPI_ADDR_RUNLOCK(); 2452 return (&sctp_ifa->address.sa); 2453 } 2454 break; 2455 #endif 2456 #ifdef INET6 2457 case AF_INET6: 2458 if (stcb->asoc.scope.ipv6_addr_legal) { 2459 struct sockaddr_in6 *sin6; 2460 2461 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2462 continue; 2463 } 2464 sin6 = &sctp_ifa->address.sin6; 2465 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2466 /* 2467 * we skip unspecifed 2468 * addresses 2469 */ 2470 continue; 2471 } 2472 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2473 &sin6->sin6_addr) != 0) { 2474 continue; 2475 } 2476 if (stcb->asoc.scope.local_scope == 0 && 2477 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2478 continue; 2479 if (stcb->asoc.scope.site_scope == 0 && 2480 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2481 continue; 2482 2483 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2484 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2485 continue; 2486 /* 2487 * found a valid local v6 address to 2488 * use 2489 */ 2490 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2491 SCTP_IPI_ADDR_RUNLOCK(); 2492 return (&sctp_ifa->address.sa); 2493 } 2494 break; 2495 #endif 2496 default: 2497 break; 2498 } 2499 } 2500 } 2501 /* no valid addresses found */ 2502 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2503 SCTP_IPI_ADDR_RUNLOCK(); 2504 return (NULL); 2505 } 2506 2507 static struct sockaddr * 2508 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2509 { 2510 struct sctp_laddr *laddr; 2511 2512 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2513 if (laddr->ifa == NULL) { 2514 continue; 2515 } 2516 /* is the address restricted ? */ 2517 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2518 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2519 continue; 2520 2521 /* found a valid local address to use */ 2522 return (&laddr->ifa->address.sa); 2523 } 2524 /* no valid addresses found */ 2525 return (NULL); 2526 } 2527 2528 /* 2529 * builds an ASCONF chunk from queued ASCONF params. 2530 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2531 */ 2532 struct mbuf * 2533 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2534 { 2535 struct mbuf *m_asconf, *m_asconf_chk; 2536 struct sctp_asconf_addr *aa; 2537 struct sctp_asconf_chunk *acp; 2538 struct sctp_asconf_paramhdr *aph; 2539 struct sctp_asconf_addr_param *aap; 2540 uint32_t p_length; 2541 uint32_t correlation_id = 1; /* 0 is reserved... */ 2542 caddr_t ptr, lookup_ptr; 2543 uint8_t lookup_used = 0; 2544 2545 /* are there any asconf params to send? */ 2546 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2547 if (aa->sent == 0) 2548 break; 2549 } 2550 if (aa == NULL) 2551 return (NULL); 2552 2553 /* 2554 * get a chunk header mbuf and a cluster for the asconf params since 2555 * it's simpler to fill in the asconf chunk header lookup address on 2556 * the fly 2557 */ 2558 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2559 if (m_asconf_chk == NULL) { 2560 /* no mbuf's */ 2561 SCTPDBG(SCTP_DEBUG_ASCONF1, 2562 "compose_asconf: couldn't get chunk mbuf!\n"); 2563 return (NULL); 2564 } 2565 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2566 if (m_asconf == NULL) { 2567 /* no mbuf's */ 2568 SCTPDBG(SCTP_DEBUG_ASCONF1, 2569 "compose_asconf: couldn't get mbuf!\n"); 2570 sctp_m_freem(m_asconf_chk); 2571 return (NULL); 2572 } 2573 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2574 SCTP_BUF_LEN(m_asconf) = 0; 2575 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2576 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2577 /* save pointers to lookup address and asconf params */ 2578 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2579 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2580 2581 /* fill in chunk header info */ 2582 acp->ch.chunk_type = SCTP_ASCONF; 2583 acp->ch.chunk_flags = 0; 2584 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2585 stcb->asoc.asconf_seq_out++; 2586 2587 /* add parameters... up to smallest MTU allowed */ 2588 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2589 if (aa->sent) 2590 continue; 2591 /* get the parameter length */ 2592 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2593 /* will it fit in current chunk? */ 2594 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2595 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2596 /* won't fit, so we're done with this chunk */ 2597 break; 2598 } 2599 /* assign (and store) a correlation id */ 2600 aa->ap.aph.correlation_id = correlation_id++; 2601 2602 /* 2603 * fill in address if we're doing a delete this is a simple 2604 * way for us to fill in the correlation address, which 2605 * should only be used by the peer if we're deleting our 2606 * source address and adding a new address (e.g. renumbering 2607 * case) 2608 */ 2609 if (lookup_used == 0 && 2610 (aa->special_del == 0) && 2611 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2612 struct sctp_ipv6addr_param *lookup; 2613 uint16_t p_size, addr_size; 2614 2615 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2616 lookup->ph.param_type = 2617 htons(aa->ap.addrp.ph.param_type); 2618 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2619 /* copy IPv6 address */ 2620 p_size = sizeof(struct sctp_ipv6addr_param); 2621 addr_size = sizeof(struct in6_addr); 2622 } else { 2623 /* copy IPv4 address */ 2624 p_size = sizeof(struct sctp_ipv4addr_param); 2625 addr_size = sizeof(struct in_addr); 2626 } 2627 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2628 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2629 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2630 lookup_used = 1; 2631 } 2632 /* copy into current space */ 2633 memcpy(ptr, &aa->ap, p_length); 2634 2635 /* network elements and update lengths */ 2636 aph = (struct sctp_asconf_paramhdr *)ptr; 2637 aap = (struct sctp_asconf_addr_param *)ptr; 2638 /* correlation_id is transparent to peer, no htonl needed */ 2639 aph->ph.param_type = htons(aph->ph.param_type); 2640 aph->ph.param_length = htons(aph->ph.param_length); 2641 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2642 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2643 2644 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2645 ptr += SCTP_SIZE32(p_length); 2646 2647 /* 2648 * these params are removed off the pending list upon 2649 * getting an ASCONF-ACK back from the peer, just set flag 2650 */ 2651 aa->sent = 1; 2652 } 2653 /* check to see if the lookup addr has been populated yet */ 2654 if (lookup_used == 0) { 2655 /* NOTE: if the address param is optional, can skip this... */ 2656 /* add any valid (existing) address... */ 2657 struct sctp_ipv6addr_param *lookup; 2658 uint16_t p_size, addr_size; 2659 struct sockaddr *found_addr; 2660 caddr_t addr_ptr; 2661 2662 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2663 found_addr = sctp_find_valid_localaddr(stcb, 2664 addr_locked); 2665 else 2666 found_addr = sctp_find_valid_localaddr_ep(stcb); 2667 2668 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2669 if (found_addr != NULL) { 2670 switch (found_addr->sa_family) { 2671 #ifdef INET6 2672 case AF_INET6: 2673 /* copy IPv6 address */ 2674 lookup->ph.param_type = 2675 htons(SCTP_IPV6_ADDRESS); 2676 p_size = sizeof(struct sctp_ipv6addr_param); 2677 addr_size = sizeof(struct in6_addr); 2678 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2679 found_addr)->sin6_addr; 2680 break; 2681 #endif 2682 #ifdef INET 2683 case AF_INET: 2684 /* copy IPv4 address */ 2685 lookup->ph.param_type = 2686 htons(SCTP_IPV4_ADDRESS); 2687 p_size = sizeof(struct sctp_ipv4addr_param); 2688 addr_size = sizeof(struct in_addr); 2689 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2690 found_addr)->sin_addr; 2691 break; 2692 #endif 2693 default: 2694 p_size = 0; 2695 addr_size = 0; 2696 addr_ptr = NULL; 2697 break; 2698 } 2699 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2700 memcpy(lookup->addr, addr_ptr, addr_size); 2701 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2702 } else { 2703 /* uh oh... don't have any address?? */ 2704 SCTPDBG(SCTP_DEBUG_ASCONF1, 2705 "compose_asconf: no lookup addr!\n"); 2706 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2707 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2708 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2709 memset(lookup->addr, 0, sizeof(struct in_addr)); 2710 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2711 } 2712 } 2713 /* chain it all together */ 2714 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2715 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2716 acp->ch.chunk_length = htons(*retlen); 2717 2718 return (m_asconf_chk); 2719 } 2720 2721 /* 2722 * section to handle address changes before an association is up eg. changes 2723 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2724 */ 2725 2726 /* 2727 * processes the (local) addresses in the INIT-ACK chunk 2728 */ 2729 static void 2730 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2731 unsigned int offset, unsigned int length) 2732 { 2733 struct sctp_paramhdr tmp_param, *ph; 2734 uint16_t plen, ptype; 2735 struct sctp_ifa *sctp_ifa; 2736 union sctp_sockstore store; 2737 #ifdef INET6 2738 struct sctp_ipv6addr_param addr6_store; 2739 #endif 2740 #ifdef INET 2741 struct sctp_ipv4addr_param addr4_store; 2742 #endif 2743 2744 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2745 if (stcb == NULL) /* Un-needed check for SA */ 2746 return; 2747 2748 /* convert to upper bound */ 2749 length += offset; 2750 2751 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2752 return; 2753 } 2754 /* go through the addresses in the init-ack */ 2755 ph = (struct sctp_paramhdr *) 2756 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2757 (uint8_t *)&tmp_param); 2758 while (ph != NULL) { 2759 ptype = ntohs(ph->param_type); 2760 plen = ntohs(ph->param_length); 2761 switch (ptype) { 2762 #ifdef INET6 2763 case SCTP_IPV6_ADDRESS: 2764 { 2765 struct sctp_ipv6addr_param *a6p; 2766 2767 /* get the entire IPv6 address param */ 2768 a6p = (struct sctp_ipv6addr_param *) 2769 sctp_m_getptr(m, offset, 2770 sizeof(struct sctp_ipv6addr_param), 2771 (uint8_t *)&addr6_store); 2772 if (plen != sizeof(struct sctp_ipv6addr_param) || 2773 a6p == NULL) { 2774 return; 2775 } 2776 memset(&store, 0, sizeof(union sctp_sockstore)); 2777 store.sin6.sin6_family = AF_INET6; 2778 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2779 store.sin6.sin6_port = stcb->rport; 2780 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2781 break; 2782 } 2783 #endif 2784 #ifdef INET 2785 case SCTP_IPV4_ADDRESS: 2786 { 2787 struct sctp_ipv4addr_param *a4p; 2788 2789 /* get the entire IPv4 address param */ 2790 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2791 sizeof(struct sctp_ipv4addr_param), 2792 (uint8_t *)&addr4_store); 2793 if (plen != sizeof(struct sctp_ipv4addr_param) || 2794 a4p == NULL) { 2795 return; 2796 } 2797 memset(&store, 0, sizeof(union sctp_sockstore)); 2798 store.sin.sin_family = AF_INET; 2799 store.sin.sin_len = sizeof(struct sockaddr_in); 2800 store.sin.sin_port = stcb->rport; 2801 store.sin.sin_addr.s_addr = a4p->addr; 2802 break; 2803 } 2804 #endif 2805 default: 2806 goto next_addr; 2807 } 2808 2809 /* see if this address really (still) exists */ 2810 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2811 SCTP_ADDR_NOT_LOCKED); 2812 if (sctp_ifa == NULL) { 2813 /* address doesn't exist anymore */ 2814 int status; 2815 2816 /* are ASCONFs allowed ? */ 2817 if ((sctp_is_feature_on(stcb->sctp_ep, 2818 SCTP_PCB_FLAGS_DO_ASCONF)) && 2819 stcb->asoc.asconf_supported) { 2820 /* queue an ASCONF DEL_IP_ADDRESS */ 2821 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2822 /* 2823 * if queued ok, and in correct state, send 2824 * out the ASCONF. 2825 */ 2826 if (status == 0 && 2827 SCTP_GET_STATE(&stcb->asoc) == 2828 SCTP_STATE_OPEN) { 2829 #ifdef SCTP_TIMER_BASED_ASCONF 2830 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2831 stcb->sctp_ep, stcb, 2832 stcb->asoc.primary_destination); 2833 #else 2834 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2835 #endif 2836 } 2837 } 2838 } 2839 next_addr: 2840 /* 2841 * Sanity check: Make sure the length isn't 0, otherwise 2842 * we'll be stuck in this loop for a long time... 2843 */ 2844 if (SCTP_SIZE32(plen) == 0) { 2845 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2846 plen, ptype); 2847 return; 2848 } 2849 /* get next parameter */ 2850 offset += SCTP_SIZE32(plen); 2851 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2852 return; 2853 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2854 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2855 } /* while */ 2856 } 2857 2858 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2859 /* 2860 * checks to see if a specific address is in the initack address list returns 2861 * 1 if found, 0 if not 2862 */ 2863 static uint32_t 2864 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2865 { 2866 struct sctp_paramhdr tmp_param, *ph; 2867 uint16_t plen, ptype; 2868 #ifdef INET 2869 struct sockaddr_in *sin; 2870 struct sctp_ipv4addr_param *a4p; 2871 struct sctp_ipv6addr_param addr4_store; 2872 #endif 2873 #ifdef INET6 2874 struct sockaddr_in6 *sin6; 2875 struct sctp_ipv6addr_param *a6p; 2876 struct sctp_ipv6addr_param addr6_store; 2877 struct sockaddr_in6 sin6_tmp; 2878 #endif 2879 2880 switch (sa->sa_family) { 2881 #ifdef INET 2882 case AF_INET: 2883 break; 2884 #endif 2885 #ifdef INET6 2886 case AF_INET6: 2887 break; 2888 #endif 2889 default: 2890 return (0); 2891 } 2892 2893 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2894 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2895 /* convert to upper bound */ 2896 length += offset; 2897 2898 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2899 SCTPDBG(SCTP_DEBUG_ASCONF1, 2900 "find_initack_addr: invalid offset?\n"); 2901 return (0); 2902 } 2903 /* go through the addresses in the init-ack */ 2904 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2905 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2906 while (ph != NULL) { 2907 ptype = ntohs(ph->param_type); 2908 plen = ntohs(ph->param_length); 2909 switch (ptype) { 2910 #ifdef INET6 2911 case SCTP_IPV6_ADDRESS: 2912 if (sa->sa_family == AF_INET6) { 2913 /* get the entire IPv6 address param */ 2914 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2915 break; 2916 } 2917 /* get the entire IPv6 address param */ 2918 a6p = (struct sctp_ipv6addr_param *) 2919 sctp_m_getptr(m, offset, 2920 sizeof(struct sctp_ipv6addr_param), 2921 (uint8_t *)&addr6_store); 2922 if (a6p == NULL) { 2923 return (0); 2924 } 2925 sin6 = (struct sockaddr_in6 *)sa; 2926 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2927 /* create a copy and clear scope */ 2928 memcpy(&sin6_tmp, sin6, 2929 sizeof(struct sockaddr_in6)); 2930 sin6 = &sin6_tmp; 2931 in6_clearscope(&sin6->sin6_addr); 2932 } 2933 if (memcmp(&sin6->sin6_addr, a6p->addr, 2934 sizeof(struct in6_addr)) == 0) { 2935 /* found it */ 2936 return (1); 2937 } 2938 } 2939 break; 2940 #endif /* INET6 */ 2941 #ifdef INET 2942 case SCTP_IPV4_ADDRESS: 2943 if (sa->sa_family == AF_INET) { 2944 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2945 break; 2946 } 2947 /* get the entire IPv4 address param */ 2948 a4p = (struct sctp_ipv4addr_param *) 2949 sctp_m_getptr(m, offset, 2950 sizeof(struct sctp_ipv4addr_param), 2951 (uint8_t *)&addr4_store); 2952 if (a4p == NULL) { 2953 return (0); 2954 } 2955 sin = (struct sockaddr_in *)sa; 2956 if (sin->sin_addr.s_addr == a4p->addr) { 2957 /* found it */ 2958 return (1); 2959 } 2960 } 2961 break; 2962 #endif 2963 default: 2964 break; 2965 } 2966 /* get next parameter */ 2967 offset += SCTP_SIZE32(plen); 2968 if (offset + sizeof(struct sctp_paramhdr) > length) { 2969 return (0); 2970 } 2971 ph = (struct sctp_paramhdr *) 2972 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2973 (uint8_t *)&tmp_param); 2974 } /* while */ 2975 /* not found! */ 2976 return (0); 2977 } 2978 2979 /* 2980 * makes sure that the current endpoint local addr list is consistent with 2981 * the new association (eg. subset bound, asconf allowed) adds addresses as 2982 * necessary 2983 */ 2984 static void 2985 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2986 int length, struct sockaddr *init_addr) 2987 { 2988 struct sctp_laddr *laddr; 2989 2990 /* go through the endpoint list */ 2991 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2992 /* be paranoid and validate the laddr */ 2993 if (laddr->ifa == NULL) { 2994 SCTPDBG(SCTP_DEBUG_ASCONF1, 2995 "check_addr_list_ep: laddr->ifa is NULL"); 2996 continue; 2997 } 2998 if (laddr->ifa == NULL) { 2999 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3000 continue; 3001 } 3002 /* do i have it implicitly? */ 3003 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3004 continue; 3005 } 3006 /* check to see if in the init-ack */ 3007 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3008 /* try to add it */ 3009 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3010 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3011 } 3012 } 3013 } 3014 3015 /* 3016 * makes sure that the current kernel address list is consistent with the new 3017 * association (with all addrs bound) adds addresses as necessary 3018 */ 3019 static void 3020 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3021 int length, struct sockaddr *init_addr, 3022 uint16_t local_scope, uint16_t site_scope, 3023 uint16_t ipv4_scope, uint16_t loopback_scope) 3024 { 3025 struct sctp_vrf *vrf = NULL; 3026 struct sctp_ifn *sctp_ifn; 3027 struct sctp_ifa *sctp_ifa; 3028 uint32_t vrf_id; 3029 #ifdef INET 3030 struct sockaddr_in *sin; 3031 #endif 3032 #ifdef INET6 3033 struct sockaddr_in6 *sin6; 3034 #endif 3035 3036 if (stcb) { 3037 vrf_id = stcb->asoc.vrf_id; 3038 } else { 3039 return; 3040 } 3041 SCTP_IPI_ADDR_RLOCK(); 3042 vrf = sctp_find_vrf(vrf_id); 3043 if (vrf == NULL) { 3044 SCTP_IPI_ADDR_RUNLOCK(); 3045 return; 3046 } 3047 /* go through all our known interfaces */ 3048 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3049 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3050 /* skip loopback interface */ 3051 continue; 3052 } 3053 /* go through each interface address */ 3054 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3055 /* do i have it implicitly? */ 3056 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3057 continue; 3058 } 3059 switch (sctp_ifa->address.sa.sa_family) { 3060 #ifdef INET 3061 case AF_INET: 3062 sin = &sctp_ifa->address.sin; 3063 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3064 &sin->sin_addr) != 0) { 3065 continue; 3066 } 3067 if ((ipv4_scope == 0) && 3068 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3069 /* private address not in scope */ 3070 continue; 3071 } 3072 break; 3073 #endif 3074 #ifdef INET6 3075 case AF_INET6: 3076 sin6 = &sctp_ifa->address.sin6; 3077 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3078 &sin6->sin6_addr) != 0) { 3079 continue; 3080 } 3081 if ((local_scope == 0) && 3082 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3083 continue; 3084 } 3085 if ((site_scope == 0) && 3086 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3087 continue; 3088 } 3089 break; 3090 #endif 3091 default: 3092 break; 3093 } 3094 /* check to see if in the init-ack */ 3095 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3096 /* try to add it */ 3097 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3098 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3099 SCTP_ADDR_LOCKED); 3100 } 3101 } /* end foreach ifa */ 3102 } /* end foreach ifn */ 3103 SCTP_IPI_ADDR_RUNLOCK(); 3104 } 3105 3106 /* 3107 * validates an init-ack chunk (from a cookie-echo) with current addresses 3108 * adds addresses from the init-ack into our local address list, if needed 3109 * queues asconf adds/deletes addresses as needed and makes appropriate list 3110 * changes for source address selection m, offset: points to the start of the 3111 * address list in an init-ack chunk length: total length of the address 3112 * params only init_addr: address where my INIT-ACK was sent from 3113 */ 3114 void 3115 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3116 int length, struct sockaddr *init_addr, 3117 uint16_t local_scope, uint16_t site_scope, 3118 uint16_t ipv4_scope, uint16_t loopback_scope) 3119 { 3120 /* process the local addresses in the initack */ 3121 sctp_process_initack_addresses(stcb, m, offset, length); 3122 3123 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3124 /* bound all case */ 3125 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3126 local_scope, site_scope, ipv4_scope, loopback_scope); 3127 } else { 3128 /* subset bound case */ 3129 if (sctp_is_feature_on(stcb->sctp_ep, 3130 SCTP_PCB_FLAGS_DO_ASCONF)) { 3131 /* asconf's allowed */ 3132 sctp_check_address_list_ep(stcb, m, offset, length, 3133 init_addr); 3134 } 3135 /* else, no asconfs allowed, so what we sent is what we get */ 3136 } 3137 } 3138 3139 /* 3140 * sctp_bindx() support 3141 */ 3142 uint32_t 3143 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3144 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3145 { 3146 struct sctp_ifa *ifa; 3147 struct sctp_laddr *laddr, *nladdr; 3148 3149 if (sa->sa_len == 0) { 3150 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3151 return (EINVAL); 3152 } 3153 if (sctp_ifap) { 3154 ifa = sctp_ifap; 3155 } else if (type == SCTP_ADD_IP_ADDRESS) { 3156 /* For an add the address MUST be on the system */ 3157 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3158 } else if (type == SCTP_DEL_IP_ADDRESS) { 3159 /* For a delete we need to find it in the inp */ 3160 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3161 } else { 3162 ifa = NULL; 3163 } 3164 if (ifa != NULL) { 3165 if (type == SCTP_ADD_IP_ADDRESS) { 3166 sctp_add_local_addr_ep(inp, ifa, type); 3167 } else if (type == SCTP_DEL_IP_ADDRESS) { 3168 if (inp->laddr_count < 2) { 3169 /* can't delete the last local address */ 3170 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3171 return (EINVAL); 3172 } 3173 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3174 sctp_nxt_addr) { 3175 if (ifa == laddr->ifa) { 3176 /* Mark in the delete */ 3177 laddr->action = type; 3178 } 3179 } 3180 } 3181 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3182 /* 3183 * There is no need to start the iterator if the inp 3184 * has no associations. 3185 */ 3186 if (type == SCTP_DEL_IP_ADDRESS) { 3187 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3188 if (laddr->ifa == ifa) { 3189 sctp_del_local_addr_ep(inp, ifa); 3190 } 3191 } 3192 } 3193 } else { 3194 struct sctp_asconf_iterator *asc; 3195 struct sctp_laddr *wi; 3196 int ret; 3197 3198 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3199 sizeof(struct sctp_asconf_iterator), 3200 SCTP_M_ASC_IT); 3201 if (asc == NULL) { 3202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3203 return (ENOMEM); 3204 } 3205 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3206 if (wi == NULL) { 3207 SCTP_FREE(asc, SCTP_M_ASC_IT); 3208 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3209 return (ENOMEM); 3210 } 3211 LIST_INIT(&asc->list_of_work); 3212 asc->cnt = 1; 3213 SCTP_INCR_LADDR_COUNT(); 3214 wi->ifa = ifa; 3215 wi->action = type; 3216 atomic_add_int(&ifa->refcount, 1); 3217 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3218 ret = sctp_initiate_iterator(sctp_asconf_iterator_ep, 3219 sctp_asconf_iterator_stcb, 3220 sctp_asconf_iterator_ep_end, 3221 SCTP_PCB_ANY_FLAGS, 3222 SCTP_PCB_ANY_FEATURES, 3223 SCTP_ASOC_ANY_STATE, 3224 (void *)asc, 0, 3225 sctp_asconf_iterator_end, inp, 0); 3226 if (ret) { 3227 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n"); 3228 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT); 3229 sctp_asconf_iterator_end(asc, 0); 3230 return (EFAULT); 3231 } 3232 } 3233 return (0); 3234 } else { 3235 /* invalid address! */ 3236 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3237 return (EADDRNOTAVAIL); 3238 } 3239 } 3240 3241 void 3242 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3243 struct sctp_nets *net) 3244 { 3245 struct sctp_asconf_addr *aa; 3246 struct sctp_ifa *sctp_ifap; 3247 struct sctp_asconf_tag_param *vtag; 3248 #ifdef INET 3249 struct sockaddr_in *to; 3250 #endif 3251 #ifdef INET6 3252 struct sockaddr_in6 *to6; 3253 #endif 3254 if (net == NULL) { 3255 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3256 return; 3257 } 3258 if (stcb == NULL) { 3259 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3260 return; 3261 } 3262 /* 3263 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3264 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3265 */ 3266 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3267 SCTP_M_ASC_ADDR); 3268 if (aa == NULL) { 3269 /* didn't get memory */ 3270 SCTPDBG(SCTP_DEBUG_ASCONF1, 3271 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3272 return; 3273 } 3274 aa->special_del = 0; 3275 /* fill in asconf address parameter fields */ 3276 /* top level elements are "networked" during send */ 3277 aa->ifa = NULL; 3278 aa->sent = 0; /* clear sent flag */ 3279 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3280 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3281 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3282 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3283 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3284 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3285 3286 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3287 SCTP_M_ASC_ADDR); 3288 if (aa == NULL) { 3289 /* didn't get memory */ 3290 SCTPDBG(SCTP_DEBUG_ASCONF1, 3291 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3292 return; 3293 } 3294 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3295 /* fill in asconf address parameter fields */ 3296 /* ADD(0.0.0.0) */ 3297 switch (net->ro._l_addr.sa.sa_family) { 3298 #ifdef INET 3299 case AF_INET: 3300 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3301 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3302 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3303 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3304 /* No need to add an address, we are using 0.0.0.0 */ 3305 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3306 break; 3307 #endif 3308 #ifdef INET6 3309 case AF_INET6: 3310 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3311 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3312 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3313 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3314 /* No need to add an address, we are using 0.0.0.0 */ 3315 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3316 break; 3317 #endif 3318 default: 3319 SCTPDBG(SCTP_DEBUG_ASCONF1, 3320 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3321 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3322 return; 3323 } 3324 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3325 SCTP_M_ASC_ADDR); 3326 if (aa == NULL) { 3327 /* didn't get memory */ 3328 SCTPDBG(SCTP_DEBUG_ASCONF1, 3329 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3330 return; 3331 } 3332 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3333 /* fill in asconf address parameter fields */ 3334 /* ADD(0.0.0.0) */ 3335 switch (net->ro._l_addr.sa.sa_family) { 3336 #ifdef INET 3337 case AF_INET: 3338 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3339 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3340 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3341 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3342 /* No need to add an address, we are using 0.0.0.0 */ 3343 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3344 break; 3345 #endif 3346 #ifdef INET6 3347 case AF_INET6: 3348 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3349 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3350 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3351 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3352 /* No need to add an address, we are using 0.0.0.0 */ 3353 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3354 break; 3355 #endif 3356 default: 3357 SCTPDBG(SCTP_DEBUG_ASCONF1, 3358 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3359 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3360 return; 3361 } 3362 /* Now we must hunt the addresses and add all global addresses */ 3363 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3364 struct sctp_vrf *vrf = NULL; 3365 struct sctp_ifn *sctp_ifnp; 3366 uint32_t vrf_id; 3367 3368 vrf_id = stcb->sctp_ep->def_vrf_id; 3369 vrf = sctp_find_vrf(vrf_id); 3370 if (vrf == NULL) { 3371 goto skip_rest; 3372 } 3373 SCTP_IPI_ADDR_RLOCK(); 3374 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3375 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3376 switch (sctp_ifap->address.sa.sa_family) { 3377 #ifdef INET 3378 case AF_INET: 3379 to = &sctp_ifap->address.sin; 3380 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3381 &to->sin_addr) != 0) { 3382 continue; 3383 } 3384 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3385 continue; 3386 } 3387 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3388 continue; 3389 } 3390 break; 3391 #endif 3392 #ifdef INET6 3393 case AF_INET6: 3394 to6 = &sctp_ifap->address.sin6; 3395 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3396 &to6->sin6_addr) != 0) { 3397 continue; 3398 } 3399 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3400 continue; 3401 } 3402 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3403 continue; 3404 } 3405 break; 3406 #endif 3407 default: 3408 continue; 3409 } 3410 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3411 } 3412 } 3413 SCTP_IPI_ADDR_RUNLOCK(); 3414 } else { 3415 struct sctp_laddr *laddr; 3416 3417 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3418 if (laddr->ifa == NULL) { 3419 continue; 3420 } 3421 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3422 /* 3423 * Address being deleted by the system, dont 3424 * list. 3425 */ 3426 continue; 3427 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3428 /* 3429 * Address being deleted on this ep don't 3430 * list. 3431 */ 3432 continue; 3433 } 3434 sctp_ifap = laddr->ifa; 3435 switch (sctp_ifap->address.sa.sa_family) { 3436 #ifdef INET 3437 case AF_INET: 3438 to = &sctp_ifap->address.sin; 3439 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3440 continue; 3441 } 3442 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3443 continue; 3444 } 3445 break; 3446 #endif 3447 #ifdef INET6 3448 case AF_INET6: 3449 to6 = &sctp_ifap->address.sin6; 3450 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3451 continue; 3452 } 3453 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3454 continue; 3455 } 3456 break; 3457 #endif 3458 default: 3459 continue; 3460 } 3461 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3462 } 3463 } 3464 skip_rest: 3465 /* Now we must send the asconf into the queue */ 3466 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3467 } 3468