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 } 280 281 /* delete all destination addresses except the source */ 282 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 283 if (net != src_net) { 284 /* delete this address */ 285 sctp_remove_net(stcb, net); 286 SCTPDBG(SCTP_DEBUG_ASCONF1, 287 "asconf_del_remote_addrs_except: deleting "); 288 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 289 (struct sockaddr *)&net->ro._l_addr); 290 /* notify upper layer */ 291 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 292 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 293 } 294 } 295 return (0); 296 } 297 298 static struct mbuf * 299 sctp_process_asconf_delete_ip(struct sockaddr *src, 300 struct sctp_asconf_paramhdr *aph, 301 struct sctp_tcb *stcb, int response_required) 302 { 303 struct mbuf *m_reply = NULL; 304 union sctp_sockstore store; 305 struct sctp_paramhdr *ph; 306 uint16_t param_type, aparam_length; 307 #if defined(INET) || defined(INET6) 308 uint16_t param_length; 309 #endif 310 struct sockaddr *sa; 311 int zero_address = 0; 312 int result; 313 #ifdef INET 314 struct sockaddr_in *sin; 315 struct sctp_ipv4addr_param *v4addr; 316 #endif 317 #ifdef INET6 318 struct sockaddr_in6 *sin6; 319 struct sctp_ipv6addr_param *v6addr; 320 #endif 321 322 aparam_length = ntohs(aph->ph.param_length); 323 ph = (struct sctp_paramhdr *)(aph + 1); 324 param_type = ntohs(ph->param_type); 325 #if defined(INET) || defined(INET6) 326 param_length = ntohs(ph->param_length); 327 #endif 328 sa = &store.sa; 329 switch (param_type) { 330 #ifdef INET 331 case SCTP_IPV4_ADDRESS: 332 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 333 /* invalid param size */ 334 return (NULL); 335 } 336 v4addr = (struct sctp_ipv4addr_param *)ph; 337 sin = &store.sin; 338 memset(sin, 0, sizeof(*sin)); 339 sin->sin_family = AF_INET; 340 sin->sin_len = sizeof(struct sockaddr_in); 341 sin->sin_port = stcb->rport; 342 sin->sin_addr.s_addr = v4addr->addr; 343 if (sin->sin_addr.s_addr == INADDR_ANY) 344 zero_address = 1; 345 SCTPDBG(SCTP_DEBUG_ASCONF1, 346 "process_asconf_delete_ip: deleting "); 347 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 348 break; 349 #endif 350 #ifdef INET6 351 case SCTP_IPV6_ADDRESS: 352 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 353 /* invalid param size */ 354 return (NULL); 355 } 356 v6addr = (struct sctp_ipv6addr_param *)ph; 357 sin6 = &store.sin6; 358 memset(sin6, 0, sizeof(*sin6)); 359 sin6->sin6_family = AF_INET6; 360 sin6->sin6_len = sizeof(struct sockaddr_in6); 361 sin6->sin6_port = stcb->rport; 362 memcpy(&sin6->sin6_addr, v6addr->addr, 363 sizeof(struct in6_addr)); 364 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 365 zero_address = 1; 366 SCTPDBG(SCTP_DEBUG_ASCONF1, 367 "process_asconf_delete_ip: deleting "); 368 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 369 break; 370 #endif 371 default: 372 m_reply = sctp_asconf_error_response(aph->correlation_id, 373 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 374 aparam_length); 375 return (m_reply); 376 } 377 378 /* make sure the source address is not being deleted */ 379 if (sctp_cmpaddr(sa, src)) { 380 /* trying to delete the source address! */ 381 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 382 m_reply = sctp_asconf_error_response(aph->correlation_id, 383 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph, 384 aparam_length); 385 return (m_reply); 386 } 387 388 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 389 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 390 result = sctp_asconf_del_remote_addrs_except(stcb, src); 391 392 if (result) { 393 /* src address did not exist? */ 394 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 395 /* what error to reply with?? */ 396 m_reply = 397 sctp_asconf_error_response(aph->correlation_id, 398 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph, 399 aparam_length); 400 } else if (response_required) { 401 m_reply = 402 sctp_asconf_success_response(aph->correlation_id); 403 } 404 return (m_reply); 405 } 406 407 /* delete the address */ 408 result = sctp_del_remote_addr(stcb, sa); 409 /* 410 * note if result == -2, the address doesn't exist in the asoc but 411 * since it's being deleted anyways, we just ack the delete -- but 412 * this probably means something has already gone awry 413 */ 414 if (result == -1) { 415 /* only one address in the asoc */ 416 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 417 m_reply = sctp_asconf_error_response(aph->correlation_id, 418 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph, 419 aparam_length); 420 } else { 421 if (response_required) { 422 m_reply = sctp_asconf_success_response(aph->correlation_id); 423 } 424 /* notify upper layer */ 425 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 426 } 427 return (m_reply); 428 } 429 430 static struct mbuf * 431 sctp_process_asconf_set_primary(struct sockaddr *src, 432 struct sctp_asconf_paramhdr *aph, 433 struct sctp_tcb *stcb, int response_required) 434 { 435 struct mbuf *m_reply = NULL; 436 union sctp_sockstore store; 437 struct sctp_paramhdr *ph; 438 uint16_t param_type, aparam_length; 439 #if defined(INET) || defined(INET6) 440 uint16_t param_length; 441 #endif 442 struct sockaddr *sa; 443 int zero_address = 0; 444 #ifdef INET 445 struct sockaddr_in *sin; 446 struct sctp_ipv4addr_param *v4addr; 447 #endif 448 #ifdef INET6 449 struct sockaddr_in6 *sin6; 450 struct sctp_ipv6addr_param *v6addr; 451 #endif 452 453 aparam_length = ntohs(aph->ph.param_length); 454 ph = (struct sctp_paramhdr *)(aph + 1); 455 param_type = ntohs(ph->param_type); 456 #if defined(INET) || defined(INET6) 457 param_length = ntohs(ph->param_length); 458 #endif 459 sa = &store.sa; 460 switch (param_type) { 461 #ifdef INET 462 case SCTP_IPV4_ADDRESS: 463 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 464 /* invalid param size */ 465 return (NULL); 466 } 467 v4addr = (struct sctp_ipv4addr_param *)ph; 468 sin = &store.sin; 469 memset(sin, 0, sizeof(*sin)); 470 sin->sin_family = AF_INET; 471 sin->sin_len = sizeof(struct sockaddr_in); 472 sin->sin_addr.s_addr = v4addr->addr; 473 if (sin->sin_addr.s_addr == INADDR_ANY) 474 zero_address = 1; 475 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 476 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 477 break; 478 #endif 479 #ifdef INET6 480 case SCTP_IPV6_ADDRESS: 481 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 482 /* invalid param size */ 483 return (NULL); 484 } 485 v6addr = (struct sctp_ipv6addr_param *)ph; 486 sin6 = &store.sin6; 487 memset(sin6, 0, sizeof(*sin6)); 488 sin6->sin6_family = AF_INET6; 489 sin6->sin6_len = sizeof(struct sockaddr_in6); 490 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 491 sizeof(struct in6_addr)); 492 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 493 zero_address = 1; 494 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 495 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 496 break; 497 #endif 498 default: 499 m_reply = sctp_asconf_error_response(aph->correlation_id, 500 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 501 aparam_length); 502 return (m_reply); 503 } 504 505 /* if 0.0.0.0/::0, use the source address instead */ 506 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 507 sa = src; 508 SCTPDBG(SCTP_DEBUG_ASCONF1, 509 "process_asconf_set_primary: using source addr "); 510 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 511 } 512 /* set the primary address */ 513 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 514 SCTPDBG(SCTP_DEBUG_ASCONF1, 515 "process_asconf_set_primary: primary address set\n"); 516 /* notify upper layer */ 517 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 518 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 519 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 520 (stcb->asoc.alternate)) { 521 sctp_free_remote_addr(stcb->asoc.alternate); 522 stcb->asoc.alternate = NULL; 523 } 524 if (response_required) { 525 m_reply = sctp_asconf_success_response(aph->correlation_id); 526 } 527 /* 528 * Mobility adaptation. Ideally, when the reception of SET 529 * PRIMARY with DELETE IP ADDRESS of the previous primary 530 * destination, unacknowledged DATA are retransmitted 531 * immediately to the new primary destination for seamless 532 * handover. If the destination is UNCONFIRMED and marked to 533 * REQ_PRIM, The retransmission occur when reception of the 534 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 535 * sctp_input.c) Also, when change of the primary 536 * destination, it is better that all subsequent new DATA 537 * containing already queued DATA are transmitted to the new 538 * primary destination. (by micchie) 539 */ 540 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 541 SCTP_MOBILITY_BASE) || 542 sctp_is_mobility_feature_on(stcb->sctp_ep, 543 SCTP_MOBILITY_FASTHANDOFF)) && 544 sctp_is_mobility_feature_on(stcb->sctp_ep, 545 SCTP_MOBILITY_PRIM_DELETED) && 546 (stcb->asoc.primary_destination->dest_state & 547 SCTP_ADDR_UNCONFIRMED) == 0) { 548 549 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, 550 stcb->sctp_ep, stcb, NULL, 551 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1); 552 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 553 SCTP_MOBILITY_FASTHANDOFF)) { 554 sctp_assoc_immediate_retrans(stcb, 555 stcb->asoc.primary_destination); 556 } 557 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 558 SCTP_MOBILITY_BASE)) { 559 sctp_move_chunks_from_net(stcb, 560 stcb->asoc.deleted_primary); 561 } 562 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 563 stcb->asoc.deleted_primary); 564 } 565 } else { 566 /* couldn't set the requested primary address! */ 567 SCTPDBG(SCTP_DEBUG_ASCONF1, 568 "process_asconf_set_primary: set primary failed!\n"); 569 /* must have been an invalid address, so report */ 570 m_reply = sctp_asconf_error_response(aph->correlation_id, 571 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 572 aparam_length); 573 } 574 575 return (m_reply); 576 } 577 578 /* 579 * handles an ASCONF chunk. 580 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 581 */ 582 void 583 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 584 struct sockaddr *src, 585 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 586 int first) 587 { 588 struct sctp_association *asoc; 589 uint32_t serial_num; 590 struct mbuf *n, *m_ack, *m_result, *m_tail; 591 struct sctp_asconf_ack_chunk *ack_cp; 592 struct sctp_asconf_paramhdr *aph; 593 struct sctp_ipv6addr_param *p_addr; 594 unsigned int asconf_limit, cnt; 595 int error = 0; /* did an error occur? */ 596 597 /* asconf param buffer */ 598 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 599 struct sctp_asconf_ack *ack, *ack_next; 600 601 /* verify minimum length */ 602 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 603 SCTPDBG(SCTP_DEBUG_ASCONF1, 604 "handle_asconf: chunk too small = %xh\n", 605 ntohs(cp->ch.chunk_length)); 606 return; 607 } 608 asoc = &stcb->asoc; 609 serial_num = ntohl(cp->serial_number); 610 611 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 612 /* got a duplicate ASCONF */ 613 SCTPDBG(SCTP_DEBUG_ASCONF1, 614 "handle_asconf: got duplicate serial number = %xh\n", 615 serial_num); 616 return; 617 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 618 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 619 serial_num, asoc->asconf_seq_in + 1); 620 return; 621 } 622 623 /* it's the expected "next" sequence number, so process it */ 624 asoc->asconf_seq_in = serial_num; /* update sequence */ 625 /* get length of all the param's in the ASCONF */ 626 asconf_limit = offset + ntohs(cp->ch.chunk_length); 627 SCTPDBG(SCTP_DEBUG_ASCONF1, 628 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 629 asconf_limit, serial_num); 630 631 if (first) { 632 /* delete old cache */ 633 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 634 635 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 636 if (ack->serial_number == serial_num) 637 break; 638 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 639 ack->serial_number, serial_num); 640 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 641 if (ack->data != NULL) { 642 sctp_m_freem(ack->data); 643 } 644 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 645 } 646 } 647 648 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 649 M_NOWAIT, 1, MT_DATA); 650 if (m_ack == NULL) { 651 SCTPDBG(SCTP_DEBUG_ASCONF1, 652 "handle_asconf: couldn't get mbuf!\n"); 653 return; 654 } 655 m_tail = m_ack; /* current reply chain's tail */ 656 657 /* fill in ASCONF-ACK header */ 658 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 659 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 660 ack_cp->ch.chunk_flags = 0; 661 ack_cp->serial_number = htonl(serial_num); 662 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 663 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 664 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 665 666 /* skip the lookup address parameter */ 667 offset += sizeof(struct sctp_asconf_chunk); 668 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); 669 if (p_addr == NULL) { 670 SCTPDBG(SCTP_DEBUG_ASCONF1, 671 "handle_asconf: couldn't get lookup addr!\n"); 672 /* respond with a missing/invalid mandatory parameter error */ 673 sctp_m_freem(m_ack); 674 return; 675 } 676 /* param_length is already validated in process_control... */ 677 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 678 /* get pointer to first asconf param in ASCONF */ 679 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); 680 if (aph == NULL) { 681 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 682 goto send_reply; 683 } 684 /* process through all parameters */ 685 cnt = 0; 686 while (aph != NULL) { 687 unsigned int param_length, param_type; 688 689 param_type = ntohs(aph->ph.param_type); 690 param_length = ntohs(aph->ph.param_length); 691 if (offset + param_length > asconf_limit) { 692 /* parameter goes beyond end of chunk! */ 693 sctp_m_freem(m_ack); 694 return; 695 } 696 m_result = NULL; 697 698 if (param_length > sizeof(aparam_buf)) { 699 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 700 sctp_m_freem(m_ack); 701 return; 702 } 703 if (param_length <= sizeof(struct sctp_paramhdr)) { 704 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 705 sctp_m_freem(m_ack); 706 } 707 /* get the entire parameter */ 708 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 709 if (aph == NULL) { 710 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 711 sctp_m_freem(m_ack); 712 return; 713 } 714 switch (param_type) { 715 case SCTP_ADD_IP_ADDRESS: 716 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 717 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 718 cnt++; 719 break; 720 case SCTP_DEL_IP_ADDRESS: 721 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 722 error); 723 break; 724 case SCTP_ERROR_CAUSE_IND: 725 /* not valid in an ASCONF chunk */ 726 break; 727 case SCTP_SET_PRIM_ADDR: 728 m_result = sctp_process_asconf_set_primary(src, aph, 729 stcb, error); 730 break; 731 case SCTP_NAT_VTAGS: 732 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 733 break; 734 case SCTP_SUCCESS_REPORT: 735 /* not valid in an ASCONF chunk */ 736 break; 737 case SCTP_ULP_ADAPTATION: 738 /* FIX */ 739 break; 740 default: 741 if ((param_type & 0x8000) == 0) { 742 /* Been told to STOP at this param */ 743 asconf_limit = offset; 744 /* 745 * FIX FIX - We need to call 746 * sctp_arethere_unrecognized_parameters() 747 * to get a operr and send it for any 748 * param's with the 0x4000 bit set OR do it 749 * here ourselves... note we still must STOP 750 * if the 0x8000 bit is clear. 751 */ 752 } 753 /* unknown/invalid param type */ 754 break; 755 } /* switch */ 756 757 /* add any (error) result to the reply mbuf chain */ 758 if (m_result != NULL) { 759 SCTP_BUF_NEXT(m_tail) = m_result; 760 m_tail = m_result; 761 /* update lengths, make sure it's aligned too */ 762 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 763 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 764 /* set flag to force success reports */ 765 error = 1; 766 } 767 offset += SCTP_SIZE32(param_length); 768 /* update remaining ASCONF message length to process */ 769 if (offset >= asconf_limit) { 770 /* no more data in the mbuf chain */ 771 break; 772 } 773 /* get pointer to next asconf param */ 774 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 775 sizeof(struct sctp_asconf_paramhdr), 776 (uint8_t *)&aparam_buf); 777 if (aph == NULL) { 778 /* can't get an asconf paramhdr */ 779 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 780 /* FIX ME - add error here... */ 781 } 782 } 783 784 send_reply: 785 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 786 /* save the ASCONF-ACK reply */ 787 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 788 struct sctp_asconf_ack); 789 if (ack == NULL) { 790 sctp_m_freem(m_ack); 791 return; 792 } 793 ack->serial_number = serial_num; 794 ack->last_sent_to = NULL; 795 ack->data = m_ack; 796 ack->len = 0; 797 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 798 ack->len += SCTP_BUF_LEN(n); 799 } 800 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 801 802 /* see if last_control_chunk_from is set properly (use IP src addr) */ 803 if (stcb->asoc.last_control_chunk_from == NULL) { 804 /* 805 * this could happen if the source address was just newly 806 * added 807 */ 808 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 809 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 810 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 811 /* look up the from address */ 812 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 813 #ifdef SCTP_DEBUG 814 if (stcb->asoc.last_control_chunk_from == NULL) { 815 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 816 } 817 #endif 818 } 819 } 820 821 /* 822 * does the address match? returns 0 if not, 1 if so 823 */ 824 static uint32_t 825 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 826 { 827 switch (sa->sa_family) { 828 #ifdef INET6 829 case AF_INET6: 830 { 831 /* XXX scopeid */ 832 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 833 834 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 835 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 836 sizeof(struct in6_addr)) == 0)) { 837 return (1); 838 } 839 break; 840 } 841 #endif 842 #ifdef INET 843 case AF_INET: 844 { 845 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 846 847 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 848 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 849 sizeof(struct in_addr)) == 0)) { 850 return (1); 851 } 852 break; 853 } 854 #endif 855 default: 856 break; 857 } 858 return (0); 859 } 860 861 /* 862 * does the address match? returns 0 if not, 1 if so 863 */ 864 static uint32_t 865 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 866 { 867 #if defined(INET) || defined(INET6) 868 uint16_t param_type, param_length; 869 870 param_type = ntohs(ph->param_type); 871 param_length = ntohs(ph->param_length); 872 #endif 873 switch (sa->sa_family) { 874 #ifdef INET6 875 case AF_INET6: 876 { 877 /* XXX scopeid */ 878 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 879 struct sctp_ipv6addr_param *v6addr; 880 881 v6addr = (struct sctp_ipv6addr_param *)ph; 882 if ((param_type == SCTP_IPV6_ADDRESS) && 883 (param_length == sizeof(struct sctp_ipv6addr_param)) && 884 (memcmp(&v6addr->addr, &sin6->sin6_addr, 885 sizeof(struct in6_addr)) == 0)) { 886 return (1); 887 } 888 break; 889 } 890 #endif 891 #ifdef INET 892 case AF_INET: 893 { 894 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 895 struct sctp_ipv4addr_param *v4addr; 896 897 v4addr = (struct sctp_ipv4addr_param *)ph; 898 if ((param_type == SCTP_IPV4_ADDRESS) && 899 (param_length == sizeof(struct sctp_ipv4addr_param)) && 900 (memcmp(&v4addr->addr, &sin->sin_addr, 901 sizeof(struct in_addr)) == 0)) { 902 return (1); 903 } 904 break; 905 } 906 #endif 907 default: 908 break; 909 } 910 return (0); 911 } 912 913 /* 914 * Cleanup for non-responded/OP ERR'd ASCONF 915 */ 916 void 917 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 918 { 919 /* 920 * clear out any existing asconfs going out 921 */ 922 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 923 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 924 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 925 /* remove the old ASCONF on our outbound queue */ 926 sctp_toss_old_asconf(stcb); 927 } 928 929 /* 930 * cleanup any cached source addresses that may be topologically 931 * incorrect after a new address has been added to this interface. 932 */ 933 static void 934 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 935 { 936 struct sctp_nets *net; 937 938 /* 939 * Ideally, we want to only clear cached routes and source addresses 940 * that are topologically incorrect. But since there is no easy way 941 * to know whether the newly added address on the ifn would cause a 942 * routing change (i.e. a new egress interface would be chosen) 943 * without doing a new routing lookup and source address selection, 944 * we will (for now) just flush any cached route using a different 945 * ifn (and cached source addrs) and let output re-choose them 946 * during the next send on that net. 947 */ 948 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 949 /* 950 * clear any cached route (and cached source address) if the 951 * route's interface is NOT the same as the address change. 952 * If it's the same interface, just clear the cached source 953 * address. 954 */ 955 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 956 ((ifn == NULL) || 957 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 958 /* clear any cached route */ 959 RTFREE(net->ro.ro_rt); 960 net->ro.ro_rt = NULL; 961 } 962 /* clear any cached source address */ 963 if (net->src_addr_selected) { 964 sctp_free_ifa(net->ro._s_addr); 965 net->ro._s_addr = NULL; 966 net->src_addr_selected = 0; 967 } 968 } 969 } 970 971 972 void 973 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 974 { 975 int error; 976 977 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 978 return; 979 } 980 if (stcb->asoc.deleted_primary == NULL) { 981 return; 982 } 983 984 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 985 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 986 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 987 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 988 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 989 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 990 stcb->asoc.deleted_primary, 991 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 992 stcb->asoc.num_send_timers_up--; 993 if (stcb->asoc.num_send_timers_up < 0) { 994 stcb->asoc.num_send_timers_up = 0; 995 } 996 SCTP_TCB_LOCK_ASSERT(stcb); 997 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 998 stcb->asoc.deleted_primary); 999 if (error) { 1000 SCTP_INP_DECR_REF(stcb->sctp_ep); 1001 return; 1002 } 1003 SCTP_TCB_LOCK_ASSERT(stcb); 1004 #ifdef SCTP_AUDITING_ENABLED 1005 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1006 #endif 1007 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1008 if ((stcb->asoc.num_send_timers_up == 0) && 1009 (stcb->asoc.sent_queue_cnt > 0)) { 1010 struct sctp_tmit_chunk *chk; 1011 1012 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1013 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1014 stcb, chk->whoTo); 1015 } 1016 } 1017 return; 1018 } 1019 1020 static int 1021 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1022 1023 void 1024 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1025 { 1026 struct sctp_tmit_chunk *chk; 1027 1028 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1029 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1030 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4); 1031 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1032 net->error_count = 0; 1033 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1034 if (chk->whoTo == net) { 1035 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1036 chk->sent = SCTP_DATAGRAM_RESEND; 1037 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1038 sctp_flight_size_decrease(chk); 1039 sctp_total_flight_decrease(stcb, chk); 1040 net->marked_retrans++; 1041 stcb->asoc.marked_retrans++; 1042 } 1043 } 1044 } 1045 if (net->marked_retrans) { 1046 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1047 } 1048 } 1049 1050 static void 1051 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1052 { 1053 struct sctp_nets *net; 1054 int addrnum, changed; 1055 1056 /* 1057 * If number of local valid addresses is 1, the valid address is 1058 * probably newly added address. Several valid addresses in this 1059 * association. A source address may not be changed. Additionally, 1060 * they can be configured on a same interface as "alias" addresses. 1061 * (by micchie) 1062 */ 1063 addrnum = sctp_local_addr_count(stcb); 1064 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1065 addrnum); 1066 if (addrnum == 1) { 1067 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1068 /* clear any cached route and source address */ 1069 if (net->ro.ro_rt) { 1070 RTFREE(net->ro.ro_rt); 1071 net->ro.ro_rt = NULL; 1072 } 1073 if (net->src_addr_selected) { 1074 sctp_free_ifa(net->ro._s_addr); 1075 net->ro._s_addr = NULL; 1076 net->src_addr_selected = 0; 1077 } 1078 /* Retransmit unacknowledged DATA chunks immediately */ 1079 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1080 SCTP_MOBILITY_FASTHANDOFF)) { 1081 sctp_net_immediate_retrans(stcb, net); 1082 } 1083 /* also, SET PRIMARY is maybe already sent */ 1084 } 1085 return; 1086 } 1087 1088 /* Multiple local addresses exsist in the association. */ 1089 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1090 /* clear any cached route and source address */ 1091 if (net->ro.ro_rt) { 1092 RTFREE(net->ro.ro_rt); 1093 net->ro.ro_rt = NULL; 1094 } 1095 if (net->src_addr_selected) { 1096 sctp_free_ifa(net->ro._s_addr); 1097 net->ro._s_addr = NULL; 1098 net->src_addr_selected = 0; 1099 } 1100 /* 1101 * Check if the nexthop is corresponding to the new address. 1102 * If the new address is corresponding to the current 1103 * nexthop, the path will be changed. If the new address is 1104 * NOT corresponding to the current nexthop, the path will 1105 * not be changed. 1106 */ 1107 SCTP_RTALLOC((sctp_route_t *)&net->ro, 1108 stcb->sctp_ep->def_vrf_id, 1109 stcb->sctp_ep->fibnum); 1110 if (net->ro.ro_rt == NULL) 1111 continue; 1112 1113 changed = 0; 1114 switch (net->ro._l_addr.sa.sa_family) { 1115 #ifdef INET 1116 case AF_INET: 1117 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) { 1118 changed = 1; 1119 } 1120 break; 1121 #endif 1122 #ifdef INET6 1123 case AF_INET6: 1124 if (sctp_v6src_match_nexthop( 1125 &newifa->address.sin6, (sctp_route_t *)&net->ro)) { 1126 changed = 1; 1127 } 1128 break; 1129 #endif 1130 default: 1131 break; 1132 } 1133 /* 1134 * if the newly added address does not relate routing 1135 * information, we skip. 1136 */ 1137 if (changed == 0) 1138 continue; 1139 /* Retransmit unacknowledged DATA chunks immediately */ 1140 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1141 SCTP_MOBILITY_FASTHANDOFF)) { 1142 sctp_net_immediate_retrans(stcb, net); 1143 } 1144 /* Send SET PRIMARY for this new address */ 1145 if (net == stcb->asoc.primary_destination) { 1146 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1147 SCTP_SET_PRIM_ADDR); 1148 } 1149 } 1150 } 1151 1152 /* 1153 * process an ADD/DELETE IP ack from peer. 1154 * addr: corresponding sctp_ifa to the address being added/deleted. 1155 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1156 * flag: 1=success, 0=failure. 1157 */ 1158 static void 1159 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1160 { 1161 /* 1162 * do the necessary asoc list work- if we get a failure indication, 1163 * leave the address on the assoc's restricted list. If we get a 1164 * success indication, remove the address from the restricted list. 1165 */ 1166 /* 1167 * Note: this will only occur for ADD_IP_ADDRESS, since 1168 * DEL_IP_ADDRESS is never actually added to the list... 1169 */ 1170 if (flag) { 1171 /* success case, so remove from the restricted list */ 1172 sctp_del_local_addr_restricted(stcb, addr); 1173 1174 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1175 SCTP_MOBILITY_BASE) || 1176 sctp_is_mobility_feature_on(stcb->sctp_ep, 1177 SCTP_MOBILITY_FASTHANDOFF)) { 1178 sctp_path_check_and_react(stcb, addr); 1179 return; 1180 } 1181 /* clear any cached/topologically incorrect source addresses */ 1182 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1183 } 1184 /* else, leave it on the list */ 1185 } 1186 1187 /* 1188 * add an asconf add/delete/set primary IP address parameter to the queue. 1189 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1190 * returns 0 if queued, -1 if not queued/removed. 1191 * NOTE: if adding, but a delete for the same address is already scheduled 1192 * (and not yet sent out), simply remove it from queue. Same for deleting 1193 * an address already scheduled for add. If a duplicate operation is found, 1194 * ignore the new one. 1195 */ 1196 static int 1197 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1198 uint16_t type) 1199 { 1200 struct sctp_asconf_addr *aa, *aa_next; 1201 1202 /* make sure the request isn't already in the queue */ 1203 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1204 /* address match? */ 1205 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1206 continue; 1207 /* 1208 * is the request already in queue but not sent? pass the 1209 * request already sent in order to resolve the following 1210 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1211 * can't remove the ADD request already sent 3. arrival of 1212 * ADD 1213 */ 1214 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1215 return (-1); 1216 } 1217 /* is the negative request already in queue, and not sent */ 1218 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1219 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1220 /* add requested, delete already queued */ 1221 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1222 /* remove the ifa from the restricted list */ 1223 sctp_del_local_addr_restricted(stcb, ifa); 1224 /* free the asconf param */ 1225 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1226 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1227 return (-1); 1228 } 1229 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1230 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1231 /* delete requested, add already queued */ 1232 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1233 /* remove the aa->ifa from the restricted list */ 1234 sctp_del_local_addr_restricted(stcb, aa->ifa); 1235 /* free the asconf param */ 1236 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1237 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1238 return (-1); 1239 } 1240 } /* for each aa */ 1241 1242 /* adding new request to the queue */ 1243 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1244 SCTP_M_ASC_ADDR); 1245 if (aa == NULL) { 1246 /* didn't get memory */ 1247 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1248 return (-1); 1249 } 1250 aa->special_del = 0; 1251 /* fill in asconf address parameter fields */ 1252 /* top level elements are "networked" during send */ 1253 aa->ap.aph.ph.param_type = type; 1254 aa->ifa = ifa; 1255 atomic_add_int(&ifa->refcount, 1); 1256 /* correlation_id filled in during send routine later... */ 1257 switch (ifa->address.sa.sa_family) { 1258 #ifdef INET6 1259 case AF_INET6: 1260 { 1261 struct sockaddr_in6 *sin6; 1262 1263 sin6 = &ifa->address.sin6; 1264 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1265 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1266 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1267 sizeof(struct sctp_ipv6addr_param); 1268 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1269 sizeof(struct in6_addr)); 1270 break; 1271 } 1272 #endif 1273 #ifdef INET 1274 case AF_INET: 1275 { 1276 struct sockaddr_in *sin; 1277 1278 sin = &ifa->address.sin; 1279 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1280 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1281 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1282 sizeof(struct sctp_ipv4addr_param); 1283 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1284 sizeof(struct in_addr)); 1285 break; 1286 } 1287 #endif 1288 default: 1289 /* invalid family! */ 1290 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1291 sctp_free_ifa(ifa); 1292 return (-1); 1293 } 1294 aa->sent = 0; /* clear sent flag */ 1295 1296 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1297 #ifdef SCTP_DEBUG 1298 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1299 if (type == SCTP_ADD_IP_ADDRESS) { 1300 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1301 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1302 } else if (type == SCTP_DEL_IP_ADDRESS) { 1303 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1304 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1305 } else { 1306 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1307 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1308 } 1309 } 1310 #endif 1311 1312 return (0); 1313 } 1314 1315 1316 /* 1317 * add an asconf operation for the given ifa and type. 1318 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1319 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1320 * advisable. 1321 */ 1322 static int 1323 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1324 uint16_t type) 1325 { 1326 uint32_t status; 1327 int pending_delete_queued = 0; 1328 int last; 1329 1330 /* see if peer supports ASCONF */ 1331 if (stcb->asoc.asconf_supported == 0) { 1332 return (-1); 1333 } 1334 1335 /* 1336 * if this is deleting the last address from the assoc, mark it as 1337 * pending. 1338 */ 1339 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { 1340 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1341 last = (sctp_local_addr_count(stcb) == 0); 1342 } else { 1343 last = (sctp_local_addr_count(stcb) == 1); 1344 } 1345 if (last) { 1346 /* set the pending delete info only */ 1347 stcb->asoc.asconf_del_pending = 1; 1348 stcb->asoc.asconf_addr_del_pending = ifa; 1349 atomic_add_int(&ifa->refcount, 1); 1350 SCTPDBG(SCTP_DEBUG_ASCONF2, 1351 "asconf_queue_add: mark delete last address pending\n"); 1352 return (-1); 1353 } 1354 } 1355 1356 /* queue an asconf parameter */ 1357 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1358 1359 /* 1360 * if this is an add, and there is a delete also pending (i.e. the 1361 * last local address is being changed), queue the pending delete 1362 * too. 1363 */ 1364 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1365 /* queue in the pending delete */ 1366 if (sctp_asconf_queue_mgmt(stcb, 1367 stcb->asoc.asconf_addr_del_pending, 1368 SCTP_DEL_IP_ADDRESS) == 0) { 1369 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n"); 1370 pending_delete_queued = 1; 1371 /* clear out the pending delete info */ 1372 stcb->asoc.asconf_del_pending = 0; 1373 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1374 stcb->asoc.asconf_addr_del_pending = NULL; 1375 } 1376 } 1377 1378 if (pending_delete_queued) { 1379 struct sctp_nets *net; 1380 1381 /* 1382 * since we know that the only/last address is now being 1383 * changed in this case, reset the cwnd/rto on all nets to 1384 * start as a new address and path. Also clear the error 1385 * counts to give the assoc the best chance to complete the 1386 * address change. 1387 */ 1388 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1389 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1390 net); 1391 net->RTO = 0; 1392 net->error_count = 0; 1393 } 1394 stcb->asoc.overall_error_count = 0; 1395 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1396 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1397 stcb->asoc.overall_error_count, 1398 0, 1399 SCTP_FROM_SCTP_ASCONF, 1400 __LINE__); 1401 } 1402 1403 /* queue in an advisory set primary too */ 1404 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1405 /* let caller know we should send this out immediately */ 1406 status = 1; 1407 } 1408 return (status); 1409 } 1410 1411 /*- 1412 * add an asconf delete IP address parameter to the queue by sockaddr and 1413 * possibly with no sctp_ifa available. This is only called by the routine 1414 * that checks the addresses in an INIT-ACK against the current address list. 1415 * returns 0 if completed, non-zero if not completed. 1416 * NOTE: if an add is already scheduled (and not yet sent out), simply 1417 * remove it from queue. If a duplicate operation is found, ignore the 1418 * new one. 1419 */ 1420 static int 1421 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1422 { 1423 struct sctp_ifa *ifa; 1424 struct sctp_asconf_addr *aa, *aa_next; 1425 1426 if (stcb == NULL) { 1427 return (-1); 1428 } 1429 /* see if peer supports ASCONF */ 1430 if (stcb->asoc.asconf_supported == 0) { 1431 return (-1); 1432 } 1433 /* make sure the request isn't already in the queue */ 1434 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1435 /* address match? */ 1436 if (sctp_asconf_addr_match(aa, sa) == 0) 1437 continue; 1438 /* is the request already in queue (sent or not) */ 1439 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1440 return (-1); 1441 } 1442 /* is the negative request already in queue, and not sent */ 1443 if (aa->sent == 1) 1444 continue; 1445 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1446 /* add already queued, so remove existing entry */ 1447 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1448 sctp_del_local_addr_restricted(stcb, aa->ifa); 1449 /* free the entry */ 1450 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1451 return (-1); 1452 } 1453 } /* for each aa */ 1454 1455 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1456 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1457 1458 /* adding new request to the queue */ 1459 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1460 SCTP_M_ASC_ADDR); 1461 if (aa == NULL) { 1462 /* didn't get memory */ 1463 SCTPDBG(SCTP_DEBUG_ASCONF1, 1464 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1465 return (-1); 1466 } 1467 aa->special_del = 0; 1468 /* fill in asconf address parameter fields */ 1469 /* top level elements are "networked" during send */ 1470 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1471 aa->ifa = ifa; 1472 if (ifa) 1473 atomic_add_int(&ifa->refcount, 1); 1474 /* correlation_id filled in during send routine later... */ 1475 switch (sa->sa_family) { 1476 #ifdef INET6 1477 case AF_INET6: 1478 { 1479 /* IPv6 address */ 1480 struct sockaddr_in6 *sin6; 1481 1482 sin6 = (struct sockaddr_in6 *)sa; 1483 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1484 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1485 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1486 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1487 sizeof(struct in6_addr)); 1488 break; 1489 } 1490 #endif 1491 #ifdef INET 1492 case AF_INET: 1493 { 1494 /* IPv4 address */ 1495 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1496 1497 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1498 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1499 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1500 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1501 sizeof(struct in_addr)); 1502 break; 1503 } 1504 #endif 1505 default: 1506 /* invalid family! */ 1507 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1508 if (ifa) 1509 sctp_free_ifa(ifa); 1510 return (-1); 1511 } 1512 aa->sent = 0; /* clear sent flag */ 1513 1514 /* delete goes to the back of the queue */ 1515 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1516 1517 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1518 return (0); 1519 } 1520 1521 /* 1522 * find a specific asconf param on our "sent" queue 1523 */ 1524 static struct sctp_asconf_addr * 1525 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1526 { 1527 struct sctp_asconf_addr *aa; 1528 1529 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1530 if (aa->ap.aph.correlation_id == correlation_id && 1531 aa->sent == 1) { 1532 /* found it */ 1533 return (aa); 1534 } 1535 } 1536 /* didn't find it */ 1537 return (NULL); 1538 } 1539 1540 /* 1541 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1542 * notifications based on the error response 1543 */ 1544 static void 1545 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1546 struct sctp_asconf_paramhdr *aph) 1547 { 1548 struct sctp_error_cause *eh; 1549 struct sctp_paramhdr *ph; 1550 uint16_t param_type; 1551 uint16_t error_code; 1552 1553 eh = (struct sctp_error_cause *)(aph + 1); 1554 ph = (struct sctp_paramhdr *)(eh + 1); 1555 /* validate lengths */ 1556 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1557 htons(aph->ph.param_length)) { 1558 /* invalid error cause length */ 1559 SCTPDBG(SCTP_DEBUG_ASCONF1, 1560 "asconf_process_error: cause element too long\n"); 1561 return; 1562 } 1563 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1564 htons(eh->length)) { 1565 /* invalid included TLV length */ 1566 SCTPDBG(SCTP_DEBUG_ASCONF1, 1567 "asconf_process_error: included TLV too long\n"); 1568 return; 1569 } 1570 /* which error code ? */ 1571 error_code = ntohs(eh->code); 1572 param_type = ntohs(aph->ph.param_type); 1573 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1574 switch (error_code) { 1575 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1576 /* we allow ourselves to "try again" for this error */ 1577 break; 1578 default: 1579 /* peer can't handle it... */ 1580 switch (param_type) { 1581 case SCTP_ADD_IP_ADDRESS: 1582 case SCTP_DEL_IP_ADDRESS: 1583 case SCTP_SET_PRIM_ADDR: 1584 break; 1585 default: 1586 break; 1587 } 1588 } 1589 } 1590 1591 /* 1592 * process an asconf queue param. 1593 * aparam: parameter to process, will be removed from the queue. 1594 * flag: 1=success case, 0=failure case 1595 */ 1596 static void 1597 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1598 struct sctp_asconf_addr *aparam, uint32_t flag) 1599 { 1600 uint16_t param_type; 1601 1602 /* process this param */ 1603 param_type = aparam->ap.aph.ph.param_type; 1604 switch (param_type) { 1605 case SCTP_ADD_IP_ADDRESS: 1606 SCTPDBG(SCTP_DEBUG_ASCONF1, 1607 "process_param_ack: added IP address\n"); 1608 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1609 break; 1610 case SCTP_DEL_IP_ADDRESS: 1611 SCTPDBG(SCTP_DEBUG_ASCONF1, 1612 "process_param_ack: deleted IP address\n"); 1613 /* nothing really to do... lists already updated */ 1614 break; 1615 case SCTP_SET_PRIM_ADDR: 1616 SCTPDBG(SCTP_DEBUG_ASCONF1, 1617 "process_param_ack: set primary IP address\n"); 1618 /* nothing to do... peer may start using this addr */ 1619 break; 1620 default: 1621 /* should NEVER happen */ 1622 break; 1623 } 1624 1625 /* remove the param and free it */ 1626 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1627 if (aparam->ifa) 1628 sctp_free_ifa(aparam->ifa); 1629 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1630 } 1631 1632 /* 1633 * cleanup from a bad asconf ack parameter 1634 */ 1635 static void 1636 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1637 { 1638 /* assume peer doesn't really know how to do asconfs */ 1639 /* XXX we could free the pending queue here */ 1640 1641 } 1642 1643 void 1644 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1645 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1646 struct sctp_nets *net, int *abort_no_unlock) 1647 { 1648 struct sctp_association *asoc; 1649 uint32_t serial_num; 1650 uint16_t ack_length; 1651 struct sctp_asconf_paramhdr *aph; 1652 struct sctp_asconf_addr *aa, *aa_next; 1653 uint32_t last_error_id = 0; /* last error correlation id */ 1654 uint32_t id; 1655 struct sctp_asconf_addr *ap; 1656 1657 /* asconf param buffer */ 1658 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1659 1660 /* verify minimum length */ 1661 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1662 SCTPDBG(SCTP_DEBUG_ASCONF1, 1663 "handle_asconf_ack: chunk too small = %xh\n", 1664 ntohs(cp->ch.chunk_length)); 1665 return; 1666 } 1667 asoc = &stcb->asoc; 1668 serial_num = ntohl(cp->serial_number); 1669 1670 /* 1671 * NOTE: we may want to handle this differently- currently, we will 1672 * abort when we get an ack for the expected serial number + 1 (eg. 1673 * we didn't send it), process an ack normally if it is the expected 1674 * serial number, and re-send the previous ack for *ALL* other 1675 * serial numbers 1676 */ 1677 1678 /* 1679 * if the serial number is the next expected, but I didn't send it, 1680 * abort the asoc, since someone probably just hijacked us... 1681 */ 1682 if (serial_num == (asoc->asconf_seq_out + 1)) { 1683 struct mbuf *op_err; 1684 char msg[SCTP_DIAG_INFO_LEN]; 1685 1686 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1687 snprintf(msg, sizeof(msg), "Never sent serial number %8.8x", 1688 serial_num); 1689 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg); 1690 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); 1691 *abort_no_unlock = 1; 1692 return; 1693 } 1694 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1695 /* got a duplicate/unexpected ASCONF-ACK */ 1696 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1697 serial_num, asoc->asconf_seq_out_acked + 1); 1698 return; 1699 } 1700 1701 if (serial_num == asoc->asconf_seq_out - 1) { 1702 /* stop our timer */ 1703 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1704 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1705 } 1706 1707 /* process the ASCONF-ACK contents */ 1708 ack_length = ntohs(cp->ch.chunk_length) - 1709 sizeof(struct sctp_asconf_ack_chunk); 1710 offset += sizeof(struct sctp_asconf_ack_chunk); 1711 /* process through all parameters */ 1712 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1713 unsigned int param_length, param_type; 1714 1715 /* get pointer to next asconf parameter */ 1716 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1717 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1718 if (aph == NULL) { 1719 /* can't get an asconf paramhdr */ 1720 sctp_asconf_ack_clear(stcb); 1721 return; 1722 } 1723 param_type = ntohs(aph->ph.param_type); 1724 param_length = ntohs(aph->ph.param_length); 1725 if (param_length > ack_length) { 1726 sctp_asconf_ack_clear(stcb); 1727 return; 1728 } 1729 if (param_length < sizeof(struct sctp_paramhdr)) { 1730 sctp_asconf_ack_clear(stcb); 1731 return; 1732 } 1733 /* get the complete parameter... */ 1734 if (param_length > sizeof(aparam_buf)) { 1735 SCTPDBG(SCTP_DEBUG_ASCONF1, 1736 "param length (%u) larger than buffer size!\n", param_length); 1737 sctp_asconf_ack_clear(stcb); 1738 return; 1739 } 1740 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1741 if (aph == NULL) { 1742 sctp_asconf_ack_clear(stcb); 1743 return; 1744 } 1745 /* correlation_id is transparent to peer, no ntohl needed */ 1746 id = aph->correlation_id; 1747 1748 switch (param_type) { 1749 case SCTP_ERROR_CAUSE_IND: 1750 last_error_id = id; 1751 /* find the corresponding asconf param in our queue */ 1752 ap = sctp_asconf_find_param(stcb, id); 1753 if (ap == NULL) { 1754 /* hmm... can't find this in our queue! */ 1755 break; 1756 } 1757 /* process the parameter, failed flag */ 1758 sctp_asconf_process_param_ack(stcb, ap, 0); 1759 /* process the error response */ 1760 sctp_asconf_process_error(stcb, aph); 1761 break; 1762 case SCTP_SUCCESS_REPORT: 1763 /* find the corresponding asconf param in our queue */ 1764 ap = sctp_asconf_find_param(stcb, id); 1765 if (ap == NULL) { 1766 /* hmm... can't find this in our queue! */ 1767 break; 1768 } 1769 /* process the parameter, success flag */ 1770 sctp_asconf_process_param_ack(stcb, ap, 1); 1771 break; 1772 default: 1773 break; 1774 } /* switch */ 1775 1776 /* update remaining ASCONF-ACK message length to process */ 1777 ack_length -= SCTP_SIZE32(param_length); 1778 if (ack_length <= 0) { 1779 /* no more data in the mbuf chain */ 1780 break; 1781 } 1782 offset += SCTP_SIZE32(param_length); 1783 } /* while */ 1784 1785 /* 1786 * if there are any "sent" params still on the queue, these are 1787 * implicitly "success", or "failed" (if we got an error back) ... 1788 * so process these appropriately 1789 * 1790 * we assume that the correlation_id's are monotonically increasing 1791 * beginning from 1 and that we don't have *that* many outstanding 1792 * at any given time 1793 */ 1794 if (last_error_id == 0) 1795 last_error_id--; /* set to "max" value */ 1796 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1797 if (aa->sent == 1) { 1798 /* 1799 * implicitly successful or failed if correlation_id 1800 * < last_error_id, then success else, failure 1801 */ 1802 if (aa->ap.aph.correlation_id < last_error_id) 1803 sctp_asconf_process_param_ack(stcb, aa, 1); 1804 else 1805 sctp_asconf_process_param_ack(stcb, aa, 0); 1806 } else { 1807 /* 1808 * since we always process in order (FIFO queue) if 1809 * we reach one that hasn't been sent, the rest 1810 * should not have been sent either. so, we're 1811 * done... 1812 */ 1813 break; 1814 } 1815 } 1816 1817 /* update the next sequence number to use */ 1818 asoc->asconf_seq_out_acked++; 1819 /* remove the old ASCONF on our outbound queue */ 1820 sctp_toss_old_asconf(stcb); 1821 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1822 #ifdef SCTP_TIMER_BASED_ASCONF 1823 /* we have more params, so restart our timer */ 1824 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1825 stcb, net); 1826 #else 1827 /* we have more params, so send out more */ 1828 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1829 #endif 1830 } 1831 } 1832 1833 #ifdef INET6 1834 static uint32_t 1835 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1836 { 1837 struct sockaddr_in6 *sin6, *net6; 1838 struct sctp_nets *net; 1839 1840 if (sa->sa_family != AF_INET6) { 1841 /* wrong family */ 1842 return (0); 1843 } 1844 sin6 = (struct sockaddr_in6 *)sa; 1845 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1846 /* not link local address */ 1847 return (0); 1848 } 1849 /* hunt through our destination nets list for this scope_id */ 1850 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1851 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1852 AF_INET6) 1853 continue; 1854 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1855 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1856 continue; 1857 if (sctp_is_same_scope(sin6, net6)) { 1858 /* found one */ 1859 return (1); 1860 } 1861 } 1862 /* didn't find one */ 1863 return (0); 1864 } 1865 #endif 1866 1867 /* 1868 * address management functions 1869 */ 1870 static void 1871 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1872 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1873 { 1874 int status; 1875 1876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1877 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1878 /* subset bound, no ASCONF allowed case, so ignore */ 1879 return; 1880 } 1881 /* 1882 * note: we know this is not the subset bound, no ASCONF case eg. 1883 * this is boundall or subset bound w/ASCONF allowed 1884 */ 1885 1886 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1887 switch (ifa->address.sa.sa_family) { 1888 #ifdef INET6 1889 case AF_INET6: 1890 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1891 &ifa->address.sin6.sin6_addr) != 0) { 1892 return; 1893 } 1894 break; 1895 #endif 1896 #ifdef INET 1897 case AF_INET: 1898 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1899 &ifa->address.sin.sin_addr) != 0) { 1900 return; 1901 } 1902 break; 1903 #endif 1904 default: 1905 return; 1906 } 1907 #ifdef INET6 1908 /* make sure we're "allowed" to add this type of addr */ 1909 if (ifa->address.sa.sa_family == AF_INET6) { 1910 /* invalid if we're not a v6 endpoint */ 1911 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1912 return; 1913 /* is the v6 addr really valid ? */ 1914 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1915 return; 1916 } 1917 } 1918 #endif 1919 /* put this address on the "pending/do not use yet" list */ 1920 sctp_add_local_addr_restricted(stcb, ifa); 1921 /* 1922 * check address scope if address is out of scope, don't queue 1923 * anything... note: this would leave the address on both inp and 1924 * asoc lists 1925 */ 1926 switch (ifa->address.sa.sa_family) { 1927 #ifdef INET6 1928 case AF_INET6: 1929 { 1930 struct sockaddr_in6 *sin6; 1931 1932 sin6 = &ifa->address.sin6; 1933 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1934 /* we skip unspecifed addresses */ 1935 return; 1936 } 1937 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1938 if (stcb->asoc.scope.local_scope == 0) { 1939 return; 1940 } 1941 /* is it the right link local scope? */ 1942 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1943 return; 1944 } 1945 } 1946 if (stcb->asoc.scope.site_scope == 0 && 1947 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1948 return; 1949 } 1950 break; 1951 } 1952 #endif 1953 #ifdef INET 1954 case AF_INET: 1955 { 1956 struct sockaddr_in *sin; 1957 1958 /* invalid if we are a v6 only endpoint */ 1959 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1960 SCTP_IPV6_V6ONLY(inp)) 1961 return; 1962 1963 sin = &ifa->address.sin; 1964 if (sin->sin_addr.s_addr == 0) { 1965 /* we skip unspecifed addresses */ 1966 return; 1967 } 1968 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1969 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1970 return; 1971 } 1972 break; 1973 } 1974 #endif 1975 default: 1976 /* else, not AF_INET or AF_INET6, so skip */ 1977 return; 1978 } 1979 1980 /* queue an asconf for this address add/delete */ 1981 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1982 /* does the peer do asconf? */ 1983 if (stcb->asoc.asconf_supported) { 1984 /* queue an asconf for this addr */ 1985 status = sctp_asconf_queue_add(stcb, ifa, type); 1986 1987 /* 1988 * if queued ok, and in the open state, send out the 1989 * ASCONF. If in the non-open state, these will be 1990 * sent when the state goes open. 1991 */ 1992 if (status == 0 && 1993 ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 1994 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 1995 #ifdef SCTP_TIMER_BASED_ASCONF 1996 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1997 stcb, stcb->asoc.primary_destination); 1998 #else 1999 sctp_send_asconf(stcb, NULL, addr_locked); 2000 #endif 2001 } 2002 } 2003 } 2004 } 2005 2006 2007 int 2008 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2009 { 2010 struct sctp_asconf_iterator *asc; 2011 struct sctp_ifa *ifa; 2012 struct sctp_laddr *l; 2013 int cnt_invalid = 0; 2014 2015 asc = (struct sctp_asconf_iterator *)ptr; 2016 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2017 ifa = l->ifa; 2018 switch (ifa->address.sa.sa_family) { 2019 #ifdef INET6 2020 case AF_INET6: 2021 /* invalid if we're not a v6 endpoint */ 2022 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2023 cnt_invalid++; 2024 if (asc->cnt == cnt_invalid) 2025 return (1); 2026 } 2027 break; 2028 #endif 2029 #ifdef INET 2030 case AF_INET: 2031 { 2032 /* invalid if we are a v6 only endpoint */ 2033 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2034 SCTP_IPV6_V6ONLY(inp)) { 2035 cnt_invalid++; 2036 if (asc->cnt == cnt_invalid) 2037 return (1); 2038 } 2039 break; 2040 } 2041 #endif 2042 default: 2043 /* invalid address family */ 2044 cnt_invalid++; 2045 if (asc->cnt == cnt_invalid) 2046 return (1); 2047 } 2048 } 2049 return (0); 2050 } 2051 2052 static int 2053 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2054 { 2055 struct sctp_ifa *ifa; 2056 struct sctp_asconf_iterator *asc; 2057 struct sctp_laddr *laddr, *nladdr, *l; 2058 2059 /* Only for specific case not bound all */ 2060 asc = (struct sctp_asconf_iterator *)ptr; 2061 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2062 ifa = l->ifa; 2063 if (l->action == SCTP_ADD_IP_ADDRESS) { 2064 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2065 sctp_nxt_addr) { 2066 if (laddr->ifa == ifa) { 2067 laddr->action = 0; 2068 break; 2069 } 2070 2071 } 2072 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2073 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2074 /* remove only after all guys are done */ 2075 if (laddr->ifa == ifa) { 2076 sctp_del_local_addr_ep(inp, ifa); 2077 } 2078 } 2079 } 2080 } 2081 return (0); 2082 } 2083 2084 void 2085 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2086 void *ptr, uint32_t val SCTP_UNUSED) 2087 { 2088 struct sctp_asconf_iterator *asc; 2089 struct sctp_ifa *ifa; 2090 struct sctp_laddr *l; 2091 int cnt_invalid = 0; 2092 int type, status; 2093 int num_queued = 0; 2094 2095 asc = (struct sctp_asconf_iterator *)ptr; 2096 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2097 ifa = l->ifa; 2098 type = l->action; 2099 2100 /* address's vrf_id must be the vrf_id of the assoc */ 2101 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2102 continue; 2103 } 2104 2105 /* Same checks again for assoc */ 2106 switch (ifa->address.sa.sa_family) { 2107 #ifdef INET6 2108 case AF_INET6: 2109 { 2110 /* invalid if we're not a v6 endpoint */ 2111 struct sockaddr_in6 *sin6; 2112 2113 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2114 cnt_invalid++; 2115 if (asc->cnt == cnt_invalid) 2116 return; 2117 else 2118 continue; 2119 } 2120 sin6 = &ifa->address.sin6; 2121 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2122 /* we skip unspecifed addresses */ 2123 continue; 2124 } 2125 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2126 &sin6->sin6_addr) != 0) { 2127 continue; 2128 } 2129 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2130 if (stcb->asoc.scope.local_scope == 0) { 2131 continue; 2132 } 2133 /* is it the right link local scope? */ 2134 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2135 continue; 2136 } 2137 } 2138 break; 2139 } 2140 #endif 2141 #ifdef INET 2142 case AF_INET: 2143 { 2144 /* invalid if we are a v6 only endpoint */ 2145 struct sockaddr_in *sin; 2146 2147 /* invalid if we are a v6 only endpoint */ 2148 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2149 SCTP_IPV6_V6ONLY(inp)) 2150 continue; 2151 2152 sin = &ifa->address.sin; 2153 if (sin->sin_addr.s_addr == 0) { 2154 /* we skip unspecifed addresses */ 2155 continue; 2156 } 2157 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2158 &sin->sin_addr) != 0) { 2159 continue; 2160 } 2161 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2162 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2163 continue; 2164 } 2165 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2166 SCTP_IPV6_V6ONLY(inp)) { 2167 cnt_invalid++; 2168 if (asc->cnt == cnt_invalid) 2169 return; 2170 else 2171 continue; 2172 } 2173 break; 2174 } 2175 #endif 2176 default: 2177 /* invalid address family */ 2178 cnt_invalid++; 2179 if (asc->cnt == cnt_invalid) 2180 return; 2181 else 2182 continue; 2183 break; 2184 } 2185 2186 if (type == SCTP_ADD_IP_ADDRESS) { 2187 /* prevent this address from being used as a source */ 2188 sctp_add_local_addr_restricted(stcb, ifa); 2189 } else if (type == SCTP_DEL_IP_ADDRESS) { 2190 struct sctp_nets *net; 2191 2192 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2193 sctp_rtentry_t *rt; 2194 2195 /* delete this address if cached */ 2196 if (net->ro._s_addr == ifa) { 2197 sctp_free_ifa(net->ro._s_addr); 2198 net->ro._s_addr = NULL; 2199 net->src_addr_selected = 0; 2200 rt = net->ro.ro_rt; 2201 if (rt) { 2202 RTFREE(rt); 2203 net->ro.ro_rt = NULL; 2204 } 2205 /* 2206 * Now we deleted our src address, 2207 * should we not also now reset the 2208 * cwnd/rto to start as if its a new 2209 * address? 2210 */ 2211 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2212 net->RTO = 0; 2213 2214 } 2215 } 2216 } else if (type == SCTP_SET_PRIM_ADDR) { 2217 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2218 /* must validate the ifa is in the ep */ 2219 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2220 continue; 2221 } 2222 } else { 2223 /* Need to check scopes for this guy */ 2224 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2225 continue; 2226 } 2227 } 2228 } 2229 /* queue an asconf for this address add/delete */ 2230 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2231 stcb->asoc.asconf_supported == 1) { 2232 /* queue an asconf for this addr */ 2233 status = sctp_asconf_queue_add(stcb, ifa, type); 2234 /* 2235 * if queued ok, and in the open state, update the 2236 * count of queued params. If in the non-open 2237 * state, these get sent when the assoc goes open. 2238 */ 2239 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2240 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2241 if (status >= 0) { 2242 num_queued++; 2243 } 2244 } 2245 } 2246 } 2247 /* 2248 * If we have queued params in the open state, send out an ASCONF. 2249 */ 2250 if (num_queued > 0) { 2251 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2252 } 2253 } 2254 2255 void 2256 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2257 { 2258 struct sctp_asconf_iterator *asc; 2259 struct sctp_ifa *ifa; 2260 struct sctp_laddr *l, *nl; 2261 2262 asc = (struct sctp_asconf_iterator *)ptr; 2263 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2264 ifa = l->ifa; 2265 if (l->action == SCTP_ADD_IP_ADDRESS) { 2266 /* Clear the defer use flag */ 2267 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2268 } 2269 sctp_free_ifa(ifa); 2270 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2271 SCTP_DECR_LADDR_COUNT(); 2272 } 2273 SCTP_FREE(asc, SCTP_M_ASC_IT); 2274 } 2275 2276 /* 2277 * sa is the sockaddr to ask the peer to set primary to. 2278 * returns: 0 = completed, -1 = error 2279 */ 2280 int32_t 2281 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2282 { 2283 uint32_t vrf_id; 2284 struct sctp_ifa *ifa; 2285 2286 /* find the ifa for the desired set primary */ 2287 vrf_id = stcb->asoc.vrf_id; 2288 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2289 if (ifa == NULL) { 2290 /* Invalid address */ 2291 return (-1); 2292 } 2293 2294 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2295 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2296 /* set primary queuing succeeded */ 2297 SCTPDBG(SCTP_DEBUG_ASCONF1, 2298 "set_primary_ip_address_sa: queued on tcb=%p, ", 2299 (void *)stcb); 2300 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2301 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2302 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2303 #ifdef SCTP_TIMER_BASED_ASCONF 2304 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2305 stcb->sctp_ep, stcb, 2306 stcb->asoc.primary_destination); 2307 #else 2308 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2309 #endif 2310 } 2311 } else { 2312 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2313 (void *)stcb); 2314 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2315 return (-1); 2316 } 2317 return (0); 2318 } 2319 2320 int 2321 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2322 { 2323 struct sctp_tmit_chunk *chk, *nchk; 2324 unsigned int offset, asconf_limit; 2325 struct sctp_asconf_chunk *acp; 2326 struct sctp_asconf_paramhdr *aph; 2327 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2328 struct sctp_paramhdr *ph; 2329 int add_cnt, del_cnt; 2330 uint16_t last_param_type; 2331 2332 add_cnt = del_cnt = 0; 2333 last_param_type = 0; 2334 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2335 if (chk->data == NULL) { 2336 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2337 continue; 2338 } 2339 offset = 0; 2340 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2341 offset += sizeof(struct sctp_asconf_chunk); 2342 asconf_limit = ntohs(acp->ch.chunk_length); 2343 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2344 if (ph == NULL) { 2345 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2346 continue; 2347 } 2348 offset += ntohs(ph->param_length); 2349 2350 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2351 if (aph == NULL) { 2352 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2353 continue; 2354 } 2355 while (aph != NULL) { 2356 unsigned int param_length, param_type; 2357 2358 param_type = ntohs(aph->ph.param_type); 2359 param_length = ntohs(aph->ph.param_length); 2360 if (offset + param_length > asconf_limit) { 2361 /* parameter goes beyond end of chunk! */ 2362 break; 2363 } 2364 if (param_length > sizeof(aparam_buf)) { 2365 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2366 break; 2367 } 2368 if (param_length <= sizeof(struct sctp_paramhdr)) { 2369 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2370 break; 2371 } 2372 2373 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2374 if (aph == NULL) { 2375 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2376 break; 2377 } 2378 2379 ph = (struct sctp_paramhdr *)(aph + 1); 2380 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2381 switch (param_type) { 2382 case SCTP_ADD_IP_ADDRESS: 2383 add_cnt++; 2384 break; 2385 case SCTP_DEL_IP_ADDRESS: 2386 del_cnt++; 2387 break; 2388 default: 2389 break; 2390 } 2391 last_param_type = param_type; 2392 } 2393 2394 offset += SCTP_SIZE32(param_length); 2395 if (offset >= asconf_limit) { 2396 /* no more data in the mbuf chain */ 2397 break; 2398 } 2399 /* get pointer to next asconf param */ 2400 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2401 } 2402 } 2403 2404 /* 2405 * we want to find the sequences which consist of ADD -> DEL -> ADD 2406 * or DEL -> ADD 2407 */ 2408 if (add_cnt > del_cnt || 2409 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2410 return (1); 2411 } 2412 return (0); 2413 } 2414 2415 static struct sockaddr * 2416 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2417 { 2418 struct sctp_vrf *vrf = NULL; 2419 struct sctp_ifn *sctp_ifn; 2420 struct sctp_ifa *sctp_ifa; 2421 2422 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2423 SCTP_IPI_ADDR_RLOCK(); 2424 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2425 if (vrf == NULL) { 2426 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2427 SCTP_IPI_ADDR_RUNLOCK(); 2428 return (NULL); 2429 } 2430 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2431 if (stcb->asoc.scope.loopback_scope == 0 && 2432 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2433 /* Skip if loopback_scope not set */ 2434 continue; 2435 } 2436 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2437 switch (sctp_ifa->address.sa.sa_family) { 2438 #ifdef INET 2439 case AF_INET: 2440 if (stcb->asoc.scope.ipv4_addr_legal) { 2441 struct sockaddr_in *sin; 2442 2443 sin = &sctp_ifa->address.sin; 2444 if (sin->sin_addr.s_addr == 0) { 2445 /* skip unspecifed addresses */ 2446 continue; 2447 } 2448 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2449 &sin->sin_addr) != 0) { 2450 continue; 2451 } 2452 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2453 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2454 continue; 2455 2456 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2457 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2458 continue; 2459 /* 2460 * found a valid local v4 address to 2461 * use 2462 */ 2463 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2464 SCTP_IPI_ADDR_RUNLOCK(); 2465 return (&sctp_ifa->address.sa); 2466 } 2467 break; 2468 #endif 2469 #ifdef INET6 2470 case AF_INET6: 2471 if (stcb->asoc.scope.ipv6_addr_legal) { 2472 struct sockaddr_in6 *sin6; 2473 2474 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2475 continue; 2476 } 2477 2478 sin6 = &sctp_ifa->address.sin6; 2479 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2480 /* 2481 * we skip unspecifed 2482 * addresses 2483 */ 2484 continue; 2485 } 2486 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2487 &sin6->sin6_addr) != 0) { 2488 continue; 2489 } 2490 if (stcb->asoc.scope.local_scope == 0 && 2491 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2492 continue; 2493 if (stcb->asoc.scope.site_scope == 0 && 2494 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2495 continue; 2496 2497 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2498 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2499 continue; 2500 /* 2501 * found a valid local v6 address to 2502 * use 2503 */ 2504 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2505 SCTP_IPI_ADDR_RUNLOCK(); 2506 return (&sctp_ifa->address.sa); 2507 } 2508 break; 2509 #endif 2510 default: 2511 break; 2512 } 2513 } 2514 } 2515 /* no valid addresses found */ 2516 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2517 SCTP_IPI_ADDR_RUNLOCK(); 2518 return (NULL); 2519 } 2520 2521 static struct sockaddr * 2522 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2523 { 2524 struct sctp_laddr *laddr; 2525 2526 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2527 if (laddr->ifa == NULL) { 2528 continue; 2529 } 2530 /* is the address restricted ? */ 2531 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2532 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2533 continue; 2534 2535 /* found a valid local address to use */ 2536 return (&laddr->ifa->address.sa); 2537 } 2538 /* no valid addresses found */ 2539 return (NULL); 2540 } 2541 2542 /* 2543 * builds an ASCONF chunk from queued ASCONF params. 2544 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2545 */ 2546 struct mbuf * 2547 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2548 { 2549 struct mbuf *m_asconf, *m_asconf_chk; 2550 struct sctp_asconf_addr *aa; 2551 struct sctp_asconf_chunk *acp; 2552 struct sctp_asconf_paramhdr *aph; 2553 struct sctp_asconf_addr_param *aap; 2554 uint32_t p_length; 2555 uint32_t correlation_id = 1; /* 0 is reserved... */ 2556 caddr_t ptr, lookup_ptr; 2557 uint8_t lookup_used = 0; 2558 2559 /* are there any asconf params to send? */ 2560 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2561 if (aa->sent == 0) 2562 break; 2563 } 2564 if (aa == NULL) 2565 return (NULL); 2566 2567 /* 2568 * get a chunk header mbuf and a cluster for the asconf params since 2569 * it's simpler to fill in the asconf chunk header lookup address on 2570 * the fly 2571 */ 2572 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2573 if (m_asconf_chk == NULL) { 2574 /* no mbuf's */ 2575 SCTPDBG(SCTP_DEBUG_ASCONF1, 2576 "compose_asconf: couldn't get chunk mbuf!\n"); 2577 return (NULL); 2578 } 2579 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2580 if (m_asconf == NULL) { 2581 /* no mbuf's */ 2582 SCTPDBG(SCTP_DEBUG_ASCONF1, 2583 "compose_asconf: couldn't get mbuf!\n"); 2584 sctp_m_freem(m_asconf_chk); 2585 return (NULL); 2586 } 2587 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2588 SCTP_BUF_LEN(m_asconf) = 0; 2589 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2590 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2591 /* save pointers to lookup address and asconf params */ 2592 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2593 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2594 2595 /* fill in chunk header info */ 2596 acp->ch.chunk_type = SCTP_ASCONF; 2597 acp->ch.chunk_flags = 0; 2598 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2599 stcb->asoc.asconf_seq_out++; 2600 2601 /* add parameters... up to smallest MTU allowed */ 2602 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2603 if (aa->sent) 2604 continue; 2605 /* get the parameter length */ 2606 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2607 /* will it fit in current chunk? */ 2608 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2609 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2610 /* won't fit, so we're done with this chunk */ 2611 break; 2612 } 2613 /* assign (and store) a correlation id */ 2614 aa->ap.aph.correlation_id = correlation_id++; 2615 2616 /* 2617 * fill in address if we're doing a delete this is a simple 2618 * way for us to fill in the correlation address, which 2619 * should only be used by the peer if we're deleting our 2620 * source address and adding a new address (e.g. renumbering 2621 * case) 2622 */ 2623 if (lookup_used == 0 && 2624 (aa->special_del == 0) && 2625 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2626 struct sctp_ipv6addr_param *lookup; 2627 uint16_t p_size, addr_size; 2628 2629 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2630 lookup->ph.param_type = 2631 htons(aa->ap.addrp.ph.param_type); 2632 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2633 /* copy IPv6 address */ 2634 p_size = sizeof(struct sctp_ipv6addr_param); 2635 addr_size = sizeof(struct in6_addr); 2636 } else { 2637 /* copy IPv4 address */ 2638 p_size = sizeof(struct sctp_ipv4addr_param); 2639 addr_size = sizeof(struct in_addr); 2640 } 2641 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2642 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2643 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2644 lookup_used = 1; 2645 } 2646 /* copy into current space */ 2647 memcpy(ptr, &aa->ap, p_length); 2648 2649 /* network elements and update lengths */ 2650 aph = (struct sctp_asconf_paramhdr *)ptr; 2651 aap = (struct sctp_asconf_addr_param *)ptr; 2652 /* correlation_id is transparent to peer, no htonl needed */ 2653 aph->ph.param_type = htons(aph->ph.param_type); 2654 aph->ph.param_length = htons(aph->ph.param_length); 2655 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2656 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2657 2658 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2659 ptr += SCTP_SIZE32(p_length); 2660 2661 /* 2662 * these params are removed off the pending list upon 2663 * getting an ASCONF-ACK back from the peer, just set flag 2664 */ 2665 aa->sent = 1; 2666 } 2667 /* check to see if the lookup addr has been populated yet */ 2668 if (lookup_used == 0) { 2669 /* NOTE: if the address param is optional, can skip this... */ 2670 /* add any valid (existing) address... */ 2671 struct sctp_ipv6addr_param *lookup; 2672 uint16_t p_size, addr_size; 2673 struct sockaddr *found_addr; 2674 caddr_t addr_ptr; 2675 2676 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2677 found_addr = sctp_find_valid_localaddr(stcb, 2678 addr_locked); 2679 else 2680 found_addr = sctp_find_valid_localaddr_ep(stcb); 2681 2682 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2683 if (found_addr != NULL) { 2684 switch (found_addr->sa_family) { 2685 #ifdef INET6 2686 case AF_INET6: 2687 /* copy IPv6 address */ 2688 lookup->ph.param_type = 2689 htons(SCTP_IPV6_ADDRESS); 2690 p_size = sizeof(struct sctp_ipv6addr_param); 2691 addr_size = sizeof(struct in6_addr); 2692 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2693 found_addr)->sin6_addr; 2694 break; 2695 #endif 2696 #ifdef INET 2697 case AF_INET: 2698 /* copy IPv4 address */ 2699 lookup->ph.param_type = 2700 htons(SCTP_IPV4_ADDRESS); 2701 p_size = sizeof(struct sctp_ipv4addr_param); 2702 addr_size = sizeof(struct in_addr); 2703 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2704 found_addr)->sin_addr; 2705 break; 2706 #endif 2707 default: 2708 p_size = 0; 2709 addr_size = 0; 2710 addr_ptr = NULL; 2711 break; 2712 } 2713 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2714 memcpy(lookup->addr, addr_ptr, addr_size); 2715 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2716 } else { 2717 /* uh oh... don't have any address?? */ 2718 SCTPDBG(SCTP_DEBUG_ASCONF1, 2719 "compose_asconf: no lookup addr!\n"); 2720 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2721 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2722 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2723 memset(lookup->addr, 0, sizeof(struct in_addr)); 2724 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2725 } 2726 } 2727 /* chain it all together */ 2728 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2729 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2730 acp->ch.chunk_length = htons(*retlen); 2731 2732 return (m_asconf_chk); 2733 } 2734 2735 /* 2736 * section to handle address changes before an association is up eg. changes 2737 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2738 */ 2739 2740 /* 2741 * processes the (local) addresses in the INIT-ACK chunk 2742 */ 2743 static void 2744 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2745 unsigned int offset, unsigned int length) 2746 { 2747 struct sctp_paramhdr tmp_param, *ph; 2748 uint16_t plen, ptype; 2749 struct sctp_ifa *sctp_ifa; 2750 union sctp_sockstore store; 2751 #ifdef INET6 2752 struct sctp_ipv6addr_param addr6_store; 2753 #endif 2754 #ifdef INET 2755 struct sctp_ipv4addr_param addr4_store; 2756 #endif 2757 2758 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2759 if (stcb == NULL) /* Un-needed check for SA */ 2760 return; 2761 2762 /* convert to upper bound */ 2763 length += offset; 2764 2765 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2766 return; 2767 } 2768 /* go through the addresses in the init-ack */ 2769 ph = (struct sctp_paramhdr *) 2770 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2771 (uint8_t *)&tmp_param); 2772 while (ph != NULL) { 2773 ptype = ntohs(ph->param_type); 2774 plen = ntohs(ph->param_length); 2775 switch (ptype) { 2776 #ifdef INET6 2777 case SCTP_IPV6_ADDRESS: 2778 { 2779 struct sctp_ipv6addr_param *a6p; 2780 2781 /* get the entire IPv6 address param */ 2782 a6p = (struct sctp_ipv6addr_param *) 2783 sctp_m_getptr(m, offset, 2784 sizeof(struct sctp_ipv6addr_param), 2785 (uint8_t *)&addr6_store); 2786 if (plen != sizeof(struct sctp_ipv6addr_param) || 2787 a6p == NULL) { 2788 return; 2789 } 2790 memset(&store, 0, sizeof(union sctp_sockstore)); 2791 store.sin6.sin6_family = AF_INET6; 2792 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2793 store.sin6.sin6_port = stcb->rport; 2794 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2795 break; 2796 } 2797 #endif 2798 #ifdef INET 2799 case SCTP_IPV4_ADDRESS: 2800 { 2801 struct sctp_ipv4addr_param *a4p; 2802 2803 /* get the entire IPv4 address param */ 2804 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2805 sizeof(struct sctp_ipv4addr_param), 2806 (uint8_t *)&addr4_store); 2807 if (plen != sizeof(struct sctp_ipv4addr_param) || 2808 a4p == NULL) { 2809 return; 2810 } 2811 memset(&store, 0, sizeof(union sctp_sockstore)); 2812 store.sin.sin_family = AF_INET; 2813 store.sin.sin_len = sizeof(struct sockaddr_in); 2814 store.sin.sin_port = stcb->rport; 2815 store.sin.sin_addr.s_addr = a4p->addr; 2816 break; 2817 } 2818 #endif 2819 default: 2820 goto next_addr; 2821 } 2822 2823 /* see if this address really (still) exists */ 2824 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2825 SCTP_ADDR_NOT_LOCKED); 2826 if (sctp_ifa == NULL) { 2827 /* address doesn't exist anymore */ 2828 int status; 2829 2830 /* are ASCONFs allowed ? */ 2831 if ((sctp_is_feature_on(stcb->sctp_ep, 2832 SCTP_PCB_FLAGS_DO_ASCONF)) && 2833 stcb->asoc.asconf_supported) { 2834 /* queue an ASCONF DEL_IP_ADDRESS */ 2835 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2836 /* 2837 * if queued ok, and in correct state, send 2838 * out the ASCONF. 2839 */ 2840 if (status == 0 && 2841 SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) { 2842 #ifdef SCTP_TIMER_BASED_ASCONF 2843 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2844 stcb->sctp_ep, stcb, 2845 stcb->asoc.primary_destination); 2846 #else 2847 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2848 #endif 2849 } 2850 } 2851 } 2852 2853 next_addr: 2854 /* 2855 * Sanity check: Make sure the length isn't 0, otherwise 2856 * we'll be stuck in this loop for a long time... 2857 */ 2858 if (SCTP_SIZE32(plen) == 0) { 2859 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2860 plen, ptype); 2861 return; 2862 } 2863 /* get next parameter */ 2864 offset += SCTP_SIZE32(plen); 2865 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2866 return; 2867 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2868 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2869 } /* while */ 2870 } 2871 2872 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2873 /* 2874 * checks to see if a specific address is in the initack address list returns 2875 * 1 if found, 0 if not 2876 */ 2877 static uint32_t 2878 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2879 { 2880 struct sctp_paramhdr tmp_param, *ph; 2881 uint16_t plen, ptype; 2882 #ifdef INET 2883 struct sockaddr_in *sin; 2884 struct sctp_ipv4addr_param *a4p; 2885 struct sctp_ipv6addr_param addr4_store; 2886 #endif 2887 #ifdef INET6 2888 struct sockaddr_in6 *sin6; 2889 struct sctp_ipv6addr_param *a6p; 2890 struct sctp_ipv6addr_param addr6_store; 2891 struct sockaddr_in6 sin6_tmp; 2892 #endif 2893 2894 switch (sa->sa_family) { 2895 #ifdef INET 2896 case AF_INET: 2897 break; 2898 #endif 2899 #ifdef INET6 2900 case AF_INET6: 2901 break; 2902 #endif 2903 default: 2904 return (0); 2905 } 2906 2907 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2908 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2909 /* convert to upper bound */ 2910 length += offset; 2911 2912 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2913 SCTPDBG(SCTP_DEBUG_ASCONF1, 2914 "find_initack_addr: invalid offset?\n"); 2915 return (0); 2916 } 2917 /* go through the addresses in the init-ack */ 2918 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2919 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2920 while (ph != NULL) { 2921 ptype = ntohs(ph->param_type); 2922 plen = ntohs(ph->param_length); 2923 switch (ptype) { 2924 #ifdef INET6 2925 case SCTP_IPV6_ADDRESS: 2926 if (sa->sa_family == AF_INET6) { 2927 /* get the entire IPv6 address param */ 2928 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2929 break; 2930 } 2931 /* get the entire IPv6 address param */ 2932 a6p = (struct sctp_ipv6addr_param *) 2933 sctp_m_getptr(m, offset, 2934 sizeof(struct sctp_ipv6addr_param), 2935 (uint8_t *)&addr6_store); 2936 if (a6p == NULL) { 2937 return (0); 2938 } 2939 sin6 = (struct sockaddr_in6 *)sa; 2940 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2941 /* create a copy and clear scope */ 2942 memcpy(&sin6_tmp, sin6, 2943 sizeof(struct sockaddr_in6)); 2944 sin6 = &sin6_tmp; 2945 in6_clearscope(&sin6->sin6_addr); 2946 } 2947 if (memcmp(&sin6->sin6_addr, a6p->addr, 2948 sizeof(struct in6_addr)) == 0) { 2949 /* found it */ 2950 return (1); 2951 } 2952 } 2953 break; 2954 #endif /* INET6 */ 2955 #ifdef INET 2956 case SCTP_IPV4_ADDRESS: 2957 if (sa->sa_family == AF_INET) { 2958 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2959 break; 2960 } 2961 /* get the entire IPv4 address param */ 2962 a4p = (struct sctp_ipv4addr_param *) 2963 sctp_m_getptr(m, offset, 2964 sizeof(struct sctp_ipv4addr_param), 2965 (uint8_t *)&addr4_store); 2966 if (a4p == NULL) { 2967 return (0); 2968 } 2969 sin = (struct sockaddr_in *)sa; 2970 if (sin->sin_addr.s_addr == a4p->addr) { 2971 /* found it */ 2972 return (1); 2973 } 2974 } 2975 break; 2976 #endif 2977 default: 2978 break; 2979 } 2980 /* get next parameter */ 2981 offset += SCTP_SIZE32(plen); 2982 if (offset + sizeof(struct sctp_paramhdr) > length) { 2983 return (0); 2984 } 2985 ph = (struct sctp_paramhdr *) 2986 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2987 (uint8_t *)&tmp_param); 2988 } /* while */ 2989 /* not found! */ 2990 return (0); 2991 } 2992 2993 /* 2994 * makes sure that the current endpoint local addr list is consistent with 2995 * the new association (eg. subset bound, asconf allowed) adds addresses as 2996 * necessary 2997 */ 2998 static void 2999 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3000 int length, struct sockaddr *init_addr) 3001 { 3002 struct sctp_laddr *laddr; 3003 3004 /* go through the endpoint list */ 3005 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3006 /* be paranoid and validate the laddr */ 3007 if (laddr->ifa == NULL) { 3008 SCTPDBG(SCTP_DEBUG_ASCONF1, 3009 "check_addr_list_ep: laddr->ifa is NULL"); 3010 continue; 3011 } 3012 if (laddr->ifa == NULL) { 3013 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3014 continue; 3015 } 3016 /* do i have it implicitly? */ 3017 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3018 continue; 3019 } 3020 /* check to see if in the init-ack */ 3021 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3022 /* try to add it */ 3023 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3024 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3025 } 3026 } 3027 } 3028 3029 /* 3030 * makes sure that the current kernel address list is consistent with the new 3031 * association (with all addrs bound) adds addresses as necessary 3032 */ 3033 static void 3034 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3035 int length, struct sockaddr *init_addr, 3036 uint16_t local_scope, uint16_t site_scope, 3037 uint16_t ipv4_scope, uint16_t loopback_scope) 3038 { 3039 struct sctp_vrf *vrf = NULL; 3040 struct sctp_ifn *sctp_ifn; 3041 struct sctp_ifa *sctp_ifa; 3042 uint32_t vrf_id; 3043 #ifdef INET 3044 struct sockaddr_in *sin; 3045 #endif 3046 #ifdef INET6 3047 struct sockaddr_in6 *sin6; 3048 #endif 3049 3050 if (stcb) { 3051 vrf_id = stcb->asoc.vrf_id; 3052 } else { 3053 return; 3054 } 3055 SCTP_IPI_ADDR_RLOCK(); 3056 vrf = sctp_find_vrf(vrf_id); 3057 if (vrf == NULL) { 3058 SCTP_IPI_ADDR_RUNLOCK(); 3059 return; 3060 } 3061 /* go through all our known interfaces */ 3062 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3063 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3064 /* skip loopback interface */ 3065 continue; 3066 } 3067 /* go through each interface address */ 3068 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3069 /* do i have it implicitly? */ 3070 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3071 continue; 3072 } 3073 switch (sctp_ifa->address.sa.sa_family) { 3074 #ifdef INET 3075 case AF_INET: 3076 sin = &sctp_ifa->address.sin; 3077 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3078 &sin->sin_addr) != 0) { 3079 continue; 3080 } 3081 if ((ipv4_scope == 0) && 3082 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3083 /* private address not in scope */ 3084 continue; 3085 } 3086 break; 3087 #endif 3088 #ifdef INET6 3089 case AF_INET6: 3090 sin6 = &sctp_ifa->address.sin6; 3091 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3092 &sin6->sin6_addr) != 0) { 3093 continue; 3094 } 3095 if ((local_scope == 0) && 3096 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3097 continue; 3098 } 3099 if ((site_scope == 0) && 3100 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3101 continue; 3102 } 3103 break; 3104 #endif 3105 default: 3106 break; 3107 } 3108 /* check to see if in the init-ack */ 3109 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3110 /* try to add it */ 3111 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3112 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3113 SCTP_ADDR_LOCKED); 3114 } 3115 } /* end foreach ifa */ 3116 } /* end foreach ifn */ 3117 SCTP_IPI_ADDR_RUNLOCK(); 3118 } 3119 3120 /* 3121 * validates an init-ack chunk (from a cookie-echo) with current addresses 3122 * adds addresses from the init-ack into our local address list, if needed 3123 * queues asconf adds/deletes addresses as needed and makes appropriate list 3124 * changes for source address selection m, offset: points to the start of the 3125 * address list in an init-ack chunk length: total length of the address 3126 * params only init_addr: address where my INIT-ACK was sent from 3127 */ 3128 void 3129 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3130 int length, struct sockaddr *init_addr, 3131 uint16_t local_scope, uint16_t site_scope, 3132 uint16_t ipv4_scope, uint16_t loopback_scope) 3133 { 3134 /* process the local addresses in the initack */ 3135 sctp_process_initack_addresses(stcb, m, offset, length); 3136 3137 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3138 /* bound all case */ 3139 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3140 local_scope, site_scope, ipv4_scope, loopback_scope); 3141 } else { 3142 /* subset bound case */ 3143 if (sctp_is_feature_on(stcb->sctp_ep, 3144 SCTP_PCB_FLAGS_DO_ASCONF)) { 3145 /* asconf's allowed */ 3146 sctp_check_address_list_ep(stcb, m, offset, length, 3147 init_addr); 3148 } 3149 /* else, no asconfs allowed, so what we sent is what we get */ 3150 } 3151 } 3152 3153 /* 3154 * sctp_bindx() support 3155 */ 3156 uint32_t 3157 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3158 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3159 { 3160 struct sctp_ifa *ifa; 3161 struct sctp_laddr *laddr, *nladdr; 3162 3163 if (sa->sa_len == 0) { 3164 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3165 return (EINVAL); 3166 } 3167 if (sctp_ifap) { 3168 ifa = sctp_ifap; 3169 } else if (type == SCTP_ADD_IP_ADDRESS) { 3170 /* For an add the address MUST be on the system */ 3171 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3172 } else if (type == SCTP_DEL_IP_ADDRESS) { 3173 /* For a delete we need to find it in the inp */ 3174 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3175 } else { 3176 ifa = NULL; 3177 } 3178 if (ifa != NULL) { 3179 if (type == SCTP_ADD_IP_ADDRESS) { 3180 sctp_add_local_addr_ep(inp, ifa, type); 3181 } else if (type == SCTP_DEL_IP_ADDRESS) { 3182 if (inp->laddr_count < 2) { 3183 /* can't delete the last local address */ 3184 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3185 return (EINVAL); 3186 } 3187 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3188 sctp_nxt_addr) { 3189 if (ifa == laddr->ifa) { 3190 /* Mark in the delete */ 3191 laddr->action = type; 3192 } 3193 } 3194 } 3195 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3196 /* 3197 * There is no need to start the iterator if the inp 3198 * has no associations. 3199 */ 3200 if (type == SCTP_DEL_IP_ADDRESS) { 3201 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3202 if (laddr->ifa == ifa) { 3203 sctp_del_local_addr_ep(inp, ifa); 3204 } 3205 } 3206 } 3207 } else { 3208 struct sctp_asconf_iterator *asc; 3209 struct sctp_laddr *wi; 3210 int ret; 3211 3212 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3213 sizeof(struct sctp_asconf_iterator), 3214 SCTP_M_ASC_IT); 3215 if (asc == NULL) { 3216 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3217 return (ENOMEM); 3218 } 3219 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3220 if (wi == NULL) { 3221 SCTP_FREE(asc, SCTP_M_ASC_IT); 3222 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3223 return (ENOMEM); 3224 } 3225 LIST_INIT(&asc->list_of_work); 3226 asc->cnt = 1; 3227 SCTP_INCR_LADDR_COUNT(); 3228 wi->ifa = ifa; 3229 wi->action = type; 3230 atomic_add_int(&ifa->refcount, 1); 3231 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3232 ret = sctp_initiate_iterator(sctp_asconf_iterator_ep, 3233 sctp_asconf_iterator_stcb, 3234 sctp_asconf_iterator_ep_end, 3235 SCTP_PCB_ANY_FLAGS, 3236 SCTP_PCB_ANY_FEATURES, 3237 SCTP_ASOC_ANY_STATE, 3238 (void *)asc, 0, 3239 sctp_asconf_iterator_end, inp, 0); 3240 if (ret) { 3241 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n"); 3242 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT); 3243 sctp_asconf_iterator_end(asc, 0); 3244 return (EFAULT); 3245 } 3246 } 3247 return (0); 3248 } else { 3249 /* invalid address! */ 3250 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3251 return (EADDRNOTAVAIL); 3252 } 3253 } 3254 3255 void 3256 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3257 struct sctp_nets *net) 3258 { 3259 struct sctp_asconf_addr *aa; 3260 struct sctp_ifa *sctp_ifap; 3261 struct sctp_asconf_tag_param *vtag; 3262 #ifdef INET 3263 struct sockaddr_in *to; 3264 #endif 3265 #ifdef INET6 3266 struct sockaddr_in6 *to6; 3267 #endif 3268 if (net == NULL) { 3269 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3270 return; 3271 } 3272 if (stcb == NULL) { 3273 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3274 return; 3275 } 3276 /* 3277 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3278 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3279 */ 3280 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3281 SCTP_M_ASC_ADDR); 3282 if (aa == NULL) { 3283 /* didn't get memory */ 3284 SCTPDBG(SCTP_DEBUG_ASCONF1, 3285 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3286 return; 3287 } 3288 aa->special_del = 0; 3289 /* fill in asconf address parameter fields */ 3290 /* top level elements are "networked" during send */ 3291 aa->ifa = NULL; 3292 aa->sent = 0; /* clear sent flag */ 3293 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3294 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3295 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3296 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3297 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3298 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3299 3300 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3301 SCTP_M_ASC_ADDR); 3302 if (aa == NULL) { 3303 /* didn't get memory */ 3304 SCTPDBG(SCTP_DEBUG_ASCONF1, 3305 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3306 return; 3307 } 3308 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3309 /* fill in asconf address parameter fields */ 3310 /* ADD(0.0.0.0) */ 3311 switch (net->ro._l_addr.sa.sa_family) { 3312 #ifdef INET 3313 case AF_INET: 3314 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3315 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3316 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3317 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3318 /* No need to add an address, we are using 0.0.0.0 */ 3319 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3320 break; 3321 #endif 3322 #ifdef INET6 3323 case AF_INET6: 3324 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3325 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3326 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3327 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3328 /* No need to add an address, we are using 0.0.0.0 */ 3329 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3330 break; 3331 #endif 3332 default: 3333 SCTPDBG(SCTP_DEBUG_ASCONF1, 3334 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3335 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3336 return; 3337 } 3338 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3339 SCTP_M_ASC_ADDR); 3340 if (aa == NULL) { 3341 /* didn't get memory */ 3342 SCTPDBG(SCTP_DEBUG_ASCONF1, 3343 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3344 return; 3345 } 3346 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3347 /* fill in asconf address parameter fields */ 3348 /* ADD(0.0.0.0) */ 3349 switch (net->ro._l_addr.sa.sa_family) { 3350 #ifdef INET 3351 case AF_INET: 3352 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3353 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3354 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3355 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3356 /* No need to add an address, we are using 0.0.0.0 */ 3357 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3358 break; 3359 #endif 3360 #ifdef INET6 3361 case AF_INET6: 3362 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3363 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3364 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3365 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3366 /* No need to add an address, we are using 0.0.0.0 */ 3367 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3368 break; 3369 #endif 3370 default: 3371 SCTPDBG(SCTP_DEBUG_ASCONF1, 3372 "sctp_asconf_send_nat_state_update: unknown address family\n"); 3373 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 3374 return; 3375 } 3376 /* Now we must hunt the addresses and add all global addresses */ 3377 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3378 struct sctp_vrf *vrf = NULL; 3379 struct sctp_ifn *sctp_ifnp; 3380 uint32_t vrf_id; 3381 3382 vrf_id = stcb->sctp_ep->def_vrf_id; 3383 vrf = sctp_find_vrf(vrf_id); 3384 if (vrf == NULL) { 3385 goto skip_rest; 3386 } 3387 3388 SCTP_IPI_ADDR_RLOCK(); 3389 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3390 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3391 switch (sctp_ifap->address.sa.sa_family) { 3392 #ifdef INET 3393 case AF_INET: 3394 to = &sctp_ifap->address.sin; 3395 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3396 &to->sin_addr) != 0) { 3397 continue; 3398 } 3399 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3400 continue; 3401 } 3402 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3403 continue; 3404 } 3405 break; 3406 #endif 3407 #ifdef INET6 3408 case AF_INET6: 3409 to6 = &sctp_ifap->address.sin6; 3410 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3411 &to6->sin6_addr) != 0) { 3412 continue; 3413 } 3414 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3415 continue; 3416 } 3417 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3418 continue; 3419 } 3420 break; 3421 #endif 3422 default: 3423 continue; 3424 } 3425 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3426 } 3427 } 3428 SCTP_IPI_ADDR_RUNLOCK(); 3429 } else { 3430 struct sctp_laddr *laddr; 3431 3432 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3433 if (laddr->ifa == NULL) { 3434 continue; 3435 } 3436 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3437 /* 3438 * Address being deleted by the system, dont 3439 * list. 3440 */ 3441 continue; 3442 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3443 /* 3444 * Address being deleted on this ep don't 3445 * list. 3446 */ 3447 continue; 3448 } 3449 sctp_ifap = laddr->ifa; 3450 switch (sctp_ifap->address.sa.sa_family) { 3451 #ifdef INET 3452 case AF_INET: 3453 to = &sctp_ifap->address.sin; 3454 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3455 continue; 3456 } 3457 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3458 continue; 3459 } 3460 break; 3461 #endif 3462 #ifdef INET6 3463 case AF_INET6: 3464 to6 = &sctp_ifap->address.sin6; 3465 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3466 continue; 3467 } 3468 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3469 continue; 3470 } 3471 break; 3472 #endif 3473 default: 3474 continue; 3475 } 3476 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3477 } 3478 } 3479 skip_rest: 3480 /* Now we must send the asconf into the queue */ 3481 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3482 } 3483