1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD$"); 37 38#include <netinet/sctp_os.h> 39#include <netinet/sctp_var.h> 40#include <netinet/sctp_sysctl.h> 41#include <netinet/sctp_pcb.h> 42#include <netinet/sctp_header.h> 43#include <netinet/sctputil.h> 44#include <netinet/sctp_output.h> 45#include <netinet/sctp_asconf.h> 46#include <netinet/sctp_timer.h> 47 48/* 49 * debug flags: 50 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 51 * SCTP_DEBUG_ASCONF2: detailed info 52 */ 53 54/* 55 * RFC 5061 56 * 57 * An ASCONF parameter queue exists per asoc which holds the pending address 58 * operations. Lists are updated upon receipt of ASCONF-ACK. 59 * 60 * A restricted_addrs list exists per assoc to hold local addresses that are 61 * not (yet) usable by the assoc as a source address. These addresses are 62 * either pending an ASCONF operation (and exist on the ASCONF parameter 63 * queue), or they are permanently restricted (the peer has returned an 64 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 65 * 66 * Deleted addresses are always immediately removed from the lists as they will 67 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 68 * only if allowed. 69 */ 70 71/* 72 * ASCONF parameter processing. 73 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 74 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 75 * FIX: allocating this many mbufs on the fly is pretty inefficient... 76 */ 77static struct mbuf * 78sctp_asconf_success_response(uint32_t id) 79{ 80 struct mbuf *m_reply = NULL; 81 struct sctp_asconf_paramhdr *aph; 82 83 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 84 0, M_NOWAIT, 1, MT_DATA); 85 if (m_reply == NULL) { 86 SCTPDBG(SCTP_DEBUG_ASCONF1, 87 "asconf_success_response: couldn't get mbuf!\n"); 88 return (NULL); 89 } 90 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 91 aph->correlation_id = id; 92 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 93 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 94 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 95 aph->ph.param_length = htons(aph->ph.param_length); 96 97 return (m_reply); 98} 99 100static struct mbuf * 101sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv, 102 uint16_t tlv_length) 103{ 104 struct mbuf *m_reply = NULL; 105 struct sctp_asconf_paramhdr *aph; 106 struct sctp_error_cause *error; 107 uint32_t buf_len; 108 uint16_t i, param_length, cause_length, padding_length; 109 uint8_t *tlv; 110 111 if (error_tlv == NULL) { 112 tlv_length = 0; 113 } 114 cause_length = sizeof(struct sctp_error_cause) + tlv_length; 115 param_length = sizeof(struct sctp_asconf_paramhdr) + cause_length; 116 padding_length = tlv_length % 4; 117 if (padding_length != 0) { 118 padding_length = 4 - padding_length; 119 } 120 buf_len = param_length + padding_length; 121 if (buf_len > MLEN) { 122 SCTPDBG(SCTP_DEBUG_ASCONF1, 123 "asconf_error_response: tlv_length (%xh) too big\n", 124 tlv_length); 125 return (NULL); 126 } 127 m_reply = sctp_get_mbuf_for_msg(buf_len, 0, M_NOWAIT, 1, MT_DATA); 128 if (m_reply == NULL) { 129 SCTPDBG(SCTP_DEBUG_ASCONF1, 130 "asconf_error_response: couldn't get mbuf!\n"); 131 return (NULL); 132 } 133 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 134 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 135 aph->ph.param_length = htons(param_length); 136 aph->correlation_id = id; 137 error = (struct sctp_error_cause *)(aph + 1); 138 error->code = htons(cause); 139 error->length = htons(cause_length); 140 if (error_tlv != NULL) { 141 tlv = (uint8_t *)(error + 1); 142 memcpy(tlv, error_tlv, tlv_length); 143 for (i = 0; i < padding_length; i++) { 144 tlv[tlv_length + i] = 0; 145 } 146 } 147 SCTP_BUF_LEN(m_reply) = buf_len; 148 return (m_reply); 149} 150 151static struct mbuf * 152sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, 153 struct sctp_tcb *stcb, int send_hb, int response_required) 154{ 155 struct sctp_nets *net; 156 struct mbuf *m_reply = NULL; 157 union sctp_sockstore store; 158 struct sctp_paramhdr *ph; 159 uint16_t param_type, aparam_length; 160#if defined(INET) || defined(INET6) 161 uint16_t param_length; 162#endif 163 struct sockaddr *sa; 164 int zero_address = 0; 165 int bad_address = 0; 166#ifdef INET 167 struct sockaddr_in *sin; 168 struct sctp_ipv4addr_param *v4addr; 169#endif 170#ifdef INET6 171 struct sockaddr_in6 *sin6; 172 struct sctp_ipv6addr_param *v6addr; 173#endif 174 175 aparam_length = ntohs(aph->ph.param_length); 176 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 177 return (NULL); 178 } 179 ph = (struct sctp_paramhdr *)(aph + 1); 180 param_type = ntohs(ph->param_type); 181#if defined(INET) || defined(INET6) 182 param_length = ntohs(ph->param_length); 183 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 184 return (NULL); 185 } 186#endif 187 sa = &store.sa; 188 switch (param_type) { 189#ifdef INET 190 case SCTP_IPV4_ADDRESS: 191 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 192 /* invalid param size */ 193 return (NULL); 194 } 195 v4addr = (struct sctp_ipv4addr_param *)ph; 196 sin = &store.sin; 197 memset(sin, 0, sizeof(*sin)); 198 sin->sin_family = AF_INET; 199 sin->sin_len = sizeof(struct sockaddr_in); 200 sin->sin_port = stcb->rport; 201 sin->sin_addr.s_addr = v4addr->addr; 202 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 203 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 204 bad_address = 1; 205 } 206 if (sin->sin_addr.s_addr == INADDR_ANY) 207 zero_address = 1; 208 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 209 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 210 break; 211#endif 212#ifdef INET6 213 case SCTP_IPV6_ADDRESS: 214 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 215 /* invalid param size */ 216 return (NULL); 217 } 218 v6addr = (struct sctp_ipv6addr_param *)ph; 219 sin6 = &store.sin6; 220 memset(sin6, 0, sizeof(*sin6)); 221 sin6->sin6_family = AF_INET6; 222 sin6->sin6_len = sizeof(struct sockaddr_in6); 223 sin6->sin6_port = stcb->rport; 224 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 225 sizeof(struct in6_addr)); 226 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 227 bad_address = 1; 228 } 229 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 230 zero_address = 1; 231 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 232 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 233 break; 234#endif 235 default: 236 m_reply = sctp_asconf_error_response(aph->correlation_id, 237 SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph, 238 aparam_length); 239 return (m_reply); 240 } /* end switch */ 241 242 /* if 0.0.0.0/::0, add the source address instead */ 243 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 244 sa = src; 245 SCTPDBG(SCTP_DEBUG_ASCONF1, 246 "process_asconf_add_ip: using source addr "); 247 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 248 } 249 net = NULL; 250 /* add the address */ 251 if (bad_address) { 252 m_reply = sctp_asconf_error_response(aph->correlation_id, 253 SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph, 254 aparam_length); 255 } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port, 256 SCTP_DONOT_SETSCOPE, 257 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 258 SCTPDBG(SCTP_DEBUG_ASCONF1, 259 "process_asconf_add_ip: error adding address\n"); 260 m_reply = sctp_asconf_error_response(aph->correlation_id, 261 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *)aph, 262 aparam_length); 263 } else { 264 if (response_required) { 265 m_reply = 266 sctp_asconf_success_response(aph->correlation_id); 267 } 268 if (net != NULL) { 269 /* notify upper layer */ 270 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 271 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 272 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 273 stcb, net); 274 if (send_hb) { 275 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 276 } 277 } 278 } 279 return (m_reply); 280} 281 282static int 283sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 284{ 285 struct sctp_nets *src_net, *net, *nnet; 286 287 /* make sure the source address exists as a destination net */ 288 src_net = sctp_findnet(stcb, src); 289 if (src_net == NULL) { 290 /* not found */ 291 return (-1); 292 } 293 294 /* delete all destination addresses except the source */ 295 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 296 if (net != src_net) { 297 /* delete this address */ 298 SCTPDBG(SCTP_DEBUG_ASCONF1, 299 "asconf_del_remote_addrs_except: deleting "); 300 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 301 (struct sockaddr *)&net->ro._l_addr); 302 /* notify upper layer */ 303 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 304 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 305 sctp_remove_net(stcb, net); 306 } 307 } 308 return (0); 309} 310 311static struct mbuf * 312sctp_process_asconf_delete_ip(struct sockaddr *src, 313 struct sctp_asconf_paramhdr *aph, 314 struct sctp_tcb *stcb, int response_required) 315{ 316 struct mbuf *m_reply = NULL; 317 union sctp_sockstore store; 318 struct sctp_paramhdr *ph; 319 uint16_t param_type, aparam_length; 320#if defined(INET) || defined(INET6) 321 uint16_t param_length; 322#endif 323 struct sockaddr *sa; 324 int zero_address = 0; 325 int result; 326#ifdef INET 327 struct sockaddr_in *sin; 328 struct sctp_ipv4addr_param *v4addr; 329#endif 330#ifdef INET6 331 struct sockaddr_in6 *sin6; 332 struct sctp_ipv6addr_param *v6addr; 333#endif 334 335 aparam_length = ntohs(aph->ph.param_length); 336 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 337 return (NULL); 338 } 339 ph = (struct sctp_paramhdr *)(aph + 1); 340 param_type = ntohs(ph->param_type); 341#if defined(INET) || defined(INET6) 342 param_length = ntohs(ph->param_length); 343 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 344 return (NULL); 345 } 346#endif 347 sa = &store.sa; 348 switch (param_type) { 349#ifdef INET 350 case SCTP_IPV4_ADDRESS: 351 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 352 /* invalid param size */ 353 return (NULL); 354 } 355 v4addr = (struct sctp_ipv4addr_param *)ph; 356 sin = &store.sin; 357 memset(sin, 0, sizeof(*sin)); 358 sin->sin_family = AF_INET; 359 sin->sin_len = sizeof(struct sockaddr_in); 360 sin->sin_port = stcb->rport; 361 sin->sin_addr.s_addr = v4addr->addr; 362 if (sin->sin_addr.s_addr == INADDR_ANY) 363 zero_address = 1; 364 SCTPDBG(SCTP_DEBUG_ASCONF1, 365 "process_asconf_delete_ip: deleting "); 366 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 367 break; 368#endif 369#ifdef INET6 370 case SCTP_IPV6_ADDRESS: 371 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 372 /* invalid param size */ 373 return (NULL); 374 } 375 v6addr = (struct sctp_ipv6addr_param *)ph; 376 sin6 = &store.sin6; 377 memset(sin6, 0, sizeof(*sin6)); 378 sin6->sin6_family = AF_INET6; 379 sin6->sin6_len = sizeof(struct sockaddr_in6); 380 sin6->sin6_port = stcb->rport; 381 memcpy(&sin6->sin6_addr, v6addr->addr, 382 sizeof(struct in6_addr)); 383 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 384 zero_address = 1; 385 SCTPDBG(SCTP_DEBUG_ASCONF1, 386 "process_asconf_delete_ip: deleting "); 387 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 388 break; 389#endif 390 default: 391 m_reply = sctp_asconf_error_response(aph->correlation_id, 392 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 393 aparam_length); 394 return (m_reply); 395 } 396 397 /* make sure the source address is not being deleted */ 398 if (sctp_cmpaddr(sa, src)) { 399 /* trying to delete the source address! */ 400 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 401 m_reply = sctp_asconf_error_response(aph->correlation_id, 402 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph, 403 aparam_length); 404 return (m_reply); 405 } 406 407 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 408 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 409 result = sctp_asconf_del_remote_addrs_except(stcb, src); 410 411 if (result) { 412 /* src address did not exist? */ 413 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 414 /* what error to reply with?? */ 415 m_reply = 416 sctp_asconf_error_response(aph->correlation_id, 417 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph, 418 aparam_length); 419 } else if (response_required) { 420 m_reply = 421 sctp_asconf_success_response(aph->correlation_id); 422 } 423 return (m_reply); 424 } 425 426 /* delete the address */ 427 result = sctp_del_remote_addr(stcb, sa); 428 /* 429 * note if result == -2, the address doesn't exist in the asoc but 430 * since it's being deleted anyways, we just ack the delete -- but 431 * this probably means something has already gone awry 432 */ 433 if (result == -1) { 434 /* only one address in the asoc */ 435 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 436 m_reply = sctp_asconf_error_response(aph->correlation_id, 437 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph, 438 aparam_length); 439 } else { 440 if (response_required) { 441 m_reply = sctp_asconf_success_response(aph->correlation_id); 442 } 443 /* notify upper layer */ 444 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 445 } 446 return (m_reply); 447} 448 449static struct mbuf * 450sctp_process_asconf_set_primary(struct sockaddr *src, 451 struct sctp_asconf_paramhdr *aph, 452 struct sctp_tcb *stcb, int response_required) 453{ 454 struct mbuf *m_reply = NULL; 455 union sctp_sockstore store; 456 struct sctp_paramhdr *ph; 457 uint16_t param_type, aparam_length; 458#if defined(INET) || defined(INET6) 459 uint16_t param_length; 460#endif 461 struct sockaddr *sa; 462 int zero_address = 0; 463#ifdef INET 464 struct sockaddr_in *sin; 465 struct sctp_ipv4addr_param *v4addr; 466#endif 467#ifdef INET6 468 struct sockaddr_in6 *sin6; 469 struct sctp_ipv6addr_param *v6addr; 470#endif 471 472 aparam_length = ntohs(aph->ph.param_length); 473 if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { 474 return (NULL); 475 } 476 ph = (struct sctp_paramhdr *)(aph + 1); 477 param_type = ntohs(ph->param_type); 478#if defined(INET) || defined(INET6) 479 param_length = ntohs(ph->param_length); 480 if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { 481 return (NULL); 482 } 483#endif 484 sa = &store.sa; 485 switch (param_type) { 486#ifdef INET 487 case SCTP_IPV4_ADDRESS: 488 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 489 /* invalid param size */ 490 return (NULL); 491 } 492 v4addr = (struct sctp_ipv4addr_param *)ph; 493 sin = &store.sin; 494 memset(sin, 0, sizeof(*sin)); 495 sin->sin_family = AF_INET; 496 sin->sin_len = sizeof(struct sockaddr_in); 497 sin->sin_addr.s_addr = v4addr->addr; 498 if (sin->sin_addr.s_addr == INADDR_ANY) 499 zero_address = 1; 500 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 501 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 502 break; 503#endif 504#ifdef INET6 505 case SCTP_IPV6_ADDRESS: 506 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 507 /* invalid param size */ 508 return (NULL); 509 } 510 v6addr = (struct sctp_ipv6addr_param *)ph; 511 sin6 = &store.sin6; 512 memset(sin6, 0, sizeof(*sin6)); 513 sin6->sin6_family = AF_INET6; 514 sin6->sin6_len = sizeof(struct sockaddr_in6); 515 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 516 sizeof(struct in6_addr)); 517 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 518 zero_address = 1; 519 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 520 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 521 break; 522#endif 523 default: 524 m_reply = sctp_asconf_error_response(aph->correlation_id, 525 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 526 aparam_length); 527 return (m_reply); 528 } 529 530 /* if 0.0.0.0/::0, use the source address instead */ 531 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 532 sa = src; 533 SCTPDBG(SCTP_DEBUG_ASCONF1, 534 "process_asconf_set_primary: using source addr "); 535 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 536 } 537 /* set the primary address */ 538 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 539 SCTPDBG(SCTP_DEBUG_ASCONF1, 540 "process_asconf_set_primary: primary address set\n"); 541 /* notify upper layer */ 542 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 543 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 544 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 545 (stcb->asoc.alternate)) { 546 sctp_free_remote_addr(stcb->asoc.alternate); 547 stcb->asoc.alternate = NULL; 548 } 549 if (response_required) { 550 m_reply = sctp_asconf_success_response(aph->correlation_id); 551 } 552 /* 553 * Mobility adaptation. Ideally, when the reception of SET 554 * PRIMARY with DELETE IP ADDRESS of the previous primary 555 * destination, unacknowledged DATA are retransmitted 556 * immediately to the new primary destination for seamless 557 * handover. If the destination is UNCONFIRMED and marked to 558 * REQ_PRIM, The retransmission occur when reception of the 559 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 560 * sctp_input.c) Also, when change of the primary 561 * destination, it is better that all subsequent new DATA 562 * containing already queued DATA are transmitted to the new 563 * primary destination. (by micchie) 564 */ 565 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 566 SCTP_MOBILITY_BASE) || 567 sctp_is_mobility_feature_on(stcb->sctp_ep, 568 SCTP_MOBILITY_FASTHANDOFF)) && 569 sctp_is_mobility_feature_on(stcb->sctp_ep, 570 SCTP_MOBILITY_PRIM_DELETED) && 571 (stcb->asoc.primary_destination->dest_state & 572 SCTP_ADDR_UNCONFIRMED) == 0) { 573 574 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, 575 stcb->sctp_ep, stcb, NULL, 576 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1); 577 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 578 SCTP_MOBILITY_FASTHANDOFF)) { 579 sctp_assoc_immediate_retrans(stcb, 580 stcb->asoc.primary_destination); 581 } 582 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 583 SCTP_MOBILITY_BASE)) { 584 sctp_move_chunks_from_net(stcb, 585 stcb->asoc.deleted_primary); 586 } 587 sctp_delete_prim_timer(stcb->sctp_ep, stcb); 588 } 589 } else { 590 /* couldn't set the requested primary address! */ 591 SCTPDBG(SCTP_DEBUG_ASCONF1, 592 "process_asconf_set_primary: set primary failed!\n"); 593 /* must have been an invalid address, so report */ 594 m_reply = sctp_asconf_error_response(aph->correlation_id, 595 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph, 596 aparam_length); 597 } 598 599 return (m_reply); 600} 601 602/* 603 * handles an ASCONF chunk. 604 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 605 */ 606void 607sctp_handle_asconf(struct mbuf *m, unsigned int offset, 608 struct sockaddr *src, 609 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 610 int first) 611{ 612 struct sctp_association *asoc; 613 uint32_t serial_num; 614 struct mbuf *n, *m_ack, *m_result, *m_tail; 615 struct sctp_asconf_ack_chunk *ack_cp; 616 struct sctp_asconf_paramhdr *aph; 617 struct sctp_ipv6addr_param *p_addr; 618 unsigned int asconf_limit, cnt; 619 int error = 0; /* did an error occur? */ 620 621 /* asconf param buffer */ 622 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 623 struct sctp_asconf_ack *ack, *ack_next; 624 625 /* verify minimum length */ 626 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 627 SCTPDBG(SCTP_DEBUG_ASCONF1, 628 "handle_asconf: chunk too small = %xh\n", 629 ntohs(cp->ch.chunk_length)); 630 return; 631 } 632 asoc = &stcb->asoc; 633 serial_num = ntohl(cp->serial_number); 634 635 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 636 /* got a duplicate ASCONF */ 637 SCTPDBG(SCTP_DEBUG_ASCONF1, 638 "handle_asconf: got duplicate serial number = %xh\n", 639 serial_num); 640 return; 641 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 642 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 643 serial_num, asoc->asconf_seq_in + 1); 644 return; 645 } 646 647 /* it's the expected "next" sequence number, so process it */ 648 asoc->asconf_seq_in = serial_num; /* update sequence */ 649 /* get length of all the param's in the ASCONF */ 650 asconf_limit = offset + ntohs(cp->ch.chunk_length); 651 SCTPDBG(SCTP_DEBUG_ASCONF1, 652 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 653 asconf_limit, serial_num); 654 655 if (first) { 656 /* delete old cache */ 657 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 658 659 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 660 if (ack->serial_number == serial_num) 661 break; 662 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 663 ack->serial_number, serial_num); 664 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 665 if (ack->data != NULL) { 666 sctp_m_freem(ack->data); 667 } 668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 669 } 670 } 671 672 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 673 M_NOWAIT, 1, MT_DATA); 674 if (m_ack == NULL) { 675 SCTPDBG(SCTP_DEBUG_ASCONF1, 676 "handle_asconf: couldn't get mbuf!\n"); 677 return; 678 } 679 m_tail = m_ack; /* current reply chain's tail */ 680 681 /* fill in ASCONF-ACK header */ 682 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 683 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 684 ack_cp->ch.chunk_flags = 0; 685 ack_cp->serial_number = htonl(serial_num); 686 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 687 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 688 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 689 690 /* skip the lookup address parameter */ 691 offset += sizeof(struct sctp_asconf_chunk); 692 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); 693 if (p_addr == NULL) { 694 SCTPDBG(SCTP_DEBUG_ASCONF1, 695 "handle_asconf: couldn't get lookup addr!\n"); 696 /* respond with a missing/invalid mandatory parameter error */ 697 sctp_m_freem(m_ack); 698 return; 699 } 700 /* skip lookup addr */ 701 offset += SCTP_SIZE32(ntohs(p_addr->ph.param_length)); 702 /* get pointer to first asconf param in ASCONF */ 703 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); 704 if (aph == NULL) { 705 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 706 goto send_reply; 707 } 708 /* process through all parameters */ 709 cnt = 0; 710 while (aph != NULL) { 711 unsigned int param_length, param_type; 712 713 param_type = ntohs(aph->ph.param_type); 714 param_length = ntohs(aph->ph.param_length); 715 if (offset + param_length > asconf_limit) { 716 /* parameter goes beyond end of chunk! */ 717 sctp_m_freem(m_ack); 718 return; 719 } 720 m_result = NULL; 721 722 if (param_length > sizeof(aparam_buf)) { 723 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 724 sctp_m_freem(m_ack); 725 return; 726 } 727 if (param_length <= sizeof(struct sctp_paramhdr)) { 728 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 729 sctp_m_freem(m_ack); 730 return; 731 } 732 /* get the entire parameter */ 733 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 734 if (aph == NULL) { 735 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 736 sctp_m_freem(m_ack); 737 return; 738 } 739 switch (param_type) { 740 case SCTP_ADD_IP_ADDRESS: 741 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 742 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 743 cnt++; 744 break; 745 case SCTP_DEL_IP_ADDRESS: 746 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 747 error); 748 break; 749 case SCTP_ERROR_CAUSE_IND: 750 /* not valid in an ASCONF chunk */ 751 break; 752 case SCTP_SET_PRIM_ADDR: 753 m_result = sctp_process_asconf_set_primary(src, aph, 754 stcb, error); 755 break; 756 case SCTP_NAT_VTAGS: 757 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 758 break; 759 case SCTP_SUCCESS_REPORT: 760 /* not valid in an ASCONF chunk */ 761 break; 762 case SCTP_ULP_ADAPTATION: 763 /* FIX */ 764 break; 765 default: 766 if ((param_type & 0x8000) == 0) { 767 /* Been told to STOP at this param */ 768 asconf_limit = offset; 769 /* 770 * FIX FIX - We need to call 771 * sctp_arethere_unrecognized_parameters() 772 * to get a operr and send it for any 773 * param's with the 0x4000 bit set OR do it 774 * here ourselves... note we still must STOP 775 * if the 0x8000 bit is clear. 776 */ 777 } 778 /* unknown/invalid param type */ 779 break; 780 } /* switch */ 781 782 /* add any (error) result to the reply mbuf chain */ 783 if (m_result != NULL) { 784 SCTP_BUF_NEXT(m_tail) = m_result; 785 m_tail = m_result; 786 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 787 /* set flag to force success reports */ 788 error = 1; 789 } 790 offset += SCTP_SIZE32(param_length); 791 /* update remaining ASCONF message length to process */ 792 if (offset >= asconf_limit) { 793 /* no more data in the mbuf chain */ 794 break; 795 } 796 /* get pointer to next asconf param */ 797 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 798 sizeof(struct sctp_asconf_paramhdr), 799 (uint8_t *)&aparam_buf); 800 if (aph == NULL) { 801 /* can't get an asconf paramhdr */ 802 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 803 /* FIX ME - add error here... */ 804 } 805 } 806 807send_reply: 808 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 809 /* save the ASCONF-ACK reply */ 810 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 811 struct sctp_asconf_ack); 812 if (ack == NULL) { 813 sctp_m_freem(m_ack); 814 return; 815 } 816 ack->serial_number = serial_num; 817 ack->last_sent_to = NULL; 818 ack->data = m_ack; 819 ack->len = 0; 820 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 821 ack->len += SCTP_BUF_LEN(n); 822 } 823 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 824 825 /* see if last_control_chunk_from is set properly (use IP src addr) */ 826 if (stcb->asoc.last_control_chunk_from == NULL) { 827 /* 828 * this could happen if the source address was just newly 829 * added 830 */ 831 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 832 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 833 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 834 /* look up the from address */ 835 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 836#ifdef SCTP_DEBUG 837 if (stcb->asoc.last_control_chunk_from == NULL) { 838 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 839 } 840#endif 841 } 842} 843 844/* 845 * does the address match? returns 0 if not, 1 if so 846 */ 847static uint32_t 848sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 849{ 850 switch (sa->sa_family) { 851#ifdef INET6 852 case AF_INET6: 853 { 854 /* XXX scopeid */ 855 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 856 857 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 858 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 859 sizeof(struct in6_addr)) == 0)) { 860 return (1); 861 } 862 break; 863 } 864#endif 865#ifdef INET 866 case AF_INET: 867 { 868 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 869 870 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 871 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 872 sizeof(struct in_addr)) == 0)) { 873 return (1); 874 } 875 break; 876 } 877#endif 878 default: 879 break; 880 } 881 return (0); 882} 883 884/* 885 * does the address match? returns 0 if not, 1 if so 886 */ 887static uint32_t 888sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 889{ 890#if defined(INET) || defined(INET6) 891 uint16_t param_type, param_length; 892 893 param_type = ntohs(ph->param_type); 894 param_length = ntohs(ph->param_length); 895#endif 896 switch (sa->sa_family) { 897#ifdef INET6 898 case AF_INET6: 899 { 900 /* XXX scopeid */ 901 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 902 struct sctp_ipv6addr_param *v6addr; 903 904 v6addr = (struct sctp_ipv6addr_param *)ph; 905 if ((param_type == SCTP_IPV6_ADDRESS) && 906 (param_length == sizeof(struct sctp_ipv6addr_param)) && 907 (memcmp(&v6addr->addr, &sin6->sin6_addr, 908 sizeof(struct in6_addr)) == 0)) { 909 return (1); 910 } 911 break; 912 } 913#endif 914#ifdef INET 915 case AF_INET: 916 { 917 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 918 struct sctp_ipv4addr_param *v4addr; 919 920 v4addr = (struct sctp_ipv4addr_param *)ph; 921 if ((param_type == SCTP_IPV4_ADDRESS) && 922 (param_length == sizeof(struct sctp_ipv4addr_param)) && 923 (memcmp(&v4addr->addr, &sin->sin_addr, 924 sizeof(struct in_addr)) == 0)) { 925 return (1); 926 } 927 break; 928 } 929#endif 930 default: 931 break; 932 } 933 return (0); 934} 935 936/* 937 * Cleanup for non-responded/OP ERR'd ASCONF 938 */ 939void 940sctp_asconf_cleanup(struct sctp_tcb *stcb) 941{ 942 /* 943 * clear out any existing asconfs going out 944 */ 945 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, 946 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 947 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 948 /* remove the old ASCONF on our outbound queue */ 949 sctp_toss_old_asconf(stcb); 950} 951 952/* 953 * cleanup any cached source addresses that may be topologically 954 * incorrect after a new address has been added to this interface. 955 */ 956static void 957sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 958{ 959 struct sctp_nets *net; 960 961 /* 962 * Ideally, we want to only clear cached routes and source addresses 963 * that are topologically incorrect. But since there is no easy way 964 * to know whether the newly added address on the ifn would cause a 965 * routing change (i.e. a new egress interface would be chosen) 966 * without doing a new routing lookup and source address selection, 967 * we will (for now) just flush any cached route using a different 968 * ifn (and cached source addrs) and let output re-choose them 969 * during the next send on that net. 970 */ 971 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 972 /* 973 * clear any cached route (and cached source address) if the 974 * route's interface is NOT the same as the address change. 975 * If it's the same interface, just clear the cached source 976 * address. 977 */ 978 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 979 ((ifn == NULL) || 980 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 981 /* clear any cached route */ 982 RTFREE(net->ro.ro_rt); 983 net->ro.ro_rt = NULL; 984 } 985 /* clear any cached source address */ 986 if (net->src_addr_selected) { 987 sctp_free_ifa(net->ro._s_addr); 988 net->ro._s_addr = NULL; 989 net->src_addr_selected = 0; 990 } 991 } 992} 993 994 995void 996sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 997{ 998 int error; 999 1000 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 1001 return; 1002 } 1003 if (stcb->asoc.deleted_primary == NULL) { 1004 return; 1005 } 1006 1007 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 1008 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 1009 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1010 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 1011 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 1012 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 1013 stcb->asoc.deleted_primary, 1014 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1015 stcb->asoc.num_send_timers_up--; 1016 if (stcb->asoc.num_send_timers_up < 0) { 1017 stcb->asoc.num_send_timers_up = 0; 1018 } 1019 SCTP_TCB_LOCK_ASSERT(stcb); 1020 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1021 stcb->asoc.deleted_primary); 1022 if (error) { 1023 SCTP_INP_DECR_REF(stcb->sctp_ep); 1024 return; 1025 } 1026 SCTP_TCB_LOCK_ASSERT(stcb); 1027#ifdef SCTP_AUDITING_ENABLED 1028 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1029#endif 1030 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1031 if ((stcb->asoc.num_send_timers_up == 0) && 1032 (stcb->asoc.sent_queue_cnt > 0)) { 1033 struct sctp_tmit_chunk *chk; 1034 1035 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1036 if (chk->whoTo != NULL) { 1037 break; 1038 } 1039 } 1040 if (chk != NULL) { 1041 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); 1042 } 1043 } 1044 } 1045 return; 1046} 1047 1048static int 1049 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1050 1051void 1052sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1053{ 1054 struct sctp_tmit_chunk *chk; 1055 1056 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1057 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1058 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4); 1059 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1060 net->error_count = 0; 1061 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1062 if (chk->whoTo == net) { 1063 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1064 chk->sent = SCTP_DATAGRAM_RESEND; 1065 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1066 sctp_flight_size_decrease(chk); 1067 sctp_total_flight_decrease(stcb, chk); 1068 net->marked_retrans++; 1069 stcb->asoc.marked_retrans++; 1070 } 1071 } 1072 } 1073 if (net->marked_retrans) { 1074 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1075 } 1076} 1077 1078static void 1079sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1080{ 1081 struct sctp_nets *net; 1082 int addrnum, changed; 1083 1084 /* 1085 * If number of local valid addresses is 1, the valid address is 1086 * probably newly added address. Several valid addresses in this 1087 * association. A source address may not be changed. Additionally, 1088 * they can be configured on a same interface as "alias" addresses. 1089 * (by micchie) 1090 */ 1091 addrnum = sctp_local_addr_count(stcb); 1092 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1093 addrnum); 1094 if (addrnum == 1) { 1095 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1096 /* clear any cached route and source address */ 1097 if (net->ro.ro_rt) { 1098 RTFREE(net->ro.ro_rt); 1099 net->ro.ro_rt = NULL; 1100 } 1101 if (net->src_addr_selected) { 1102 sctp_free_ifa(net->ro._s_addr); 1103 net->ro._s_addr = NULL; 1104 net->src_addr_selected = 0; 1105 } 1106 /* Retransmit unacknowledged DATA chunks immediately */ 1107 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1108 SCTP_MOBILITY_FASTHANDOFF)) { 1109 sctp_net_immediate_retrans(stcb, net); 1110 } 1111 /* also, SET PRIMARY is maybe already sent */ 1112 } 1113 return; 1114 } 1115 1116 /* Multiple local addresses exsist in the association. */ 1117 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1118 /* clear any cached route and source address */ 1119 if (net->ro.ro_rt) { 1120 RTFREE(net->ro.ro_rt); 1121 net->ro.ro_rt = NULL; 1122 } 1123 if (net->src_addr_selected) { 1124 sctp_free_ifa(net->ro._s_addr); 1125 net->ro._s_addr = NULL; 1126 net->src_addr_selected = 0; 1127 } 1128 /* 1129 * Check if the nexthop is corresponding to the new address. 1130 * If the new address is corresponding to the current 1131 * nexthop, the path will be changed. If the new address is 1132 * NOT corresponding to the current nexthop, the path will 1133 * not be changed. 1134 */ 1135 SCTP_RTALLOC((sctp_route_t *)&net->ro, 1136 stcb->sctp_ep->def_vrf_id, 1137 stcb->sctp_ep->fibnum); 1138 if (net->ro.ro_rt == NULL) 1139 continue; 1140 1141 changed = 0; 1142 switch (net->ro._l_addr.sa.sa_family) { 1143#ifdef INET 1144 case AF_INET: 1145 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) { 1146 changed = 1; 1147 } 1148 break; 1149#endif 1150#ifdef INET6 1151 case AF_INET6: 1152 if (sctp_v6src_match_nexthop( 1153 &newifa->address.sin6, (sctp_route_t *)&net->ro)) { 1154 changed = 1; 1155 } 1156 break; 1157#endif 1158 default: 1159 break; 1160 } 1161 /* 1162 * if the newly added address does not relate routing 1163 * information, we skip. 1164 */ 1165 if (changed == 0) 1166 continue; 1167 /* Retransmit unacknowledged DATA chunks immediately */ 1168 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1169 SCTP_MOBILITY_FASTHANDOFF)) { 1170 sctp_net_immediate_retrans(stcb, net); 1171 } 1172 /* Send SET PRIMARY for this new address */ 1173 if (net == stcb->asoc.primary_destination) { 1174 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1175 SCTP_SET_PRIM_ADDR); 1176 } 1177 } 1178} 1179 1180/* 1181 * process an ADD/DELETE IP ack from peer. 1182 * addr: corresponding sctp_ifa to the address being added/deleted. 1183 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1184 * flag: 1=success, 0=failure. 1185 */ 1186static void 1187sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1188{ 1189 /* 1190 * do the necessary asoc list work- if we get a failure indication, 1191 * leave the address on the assoc's restricted list. If we get a 1192 * success indication, remove the address from the restricted list. 1193 */ 1194 /* 1195 * Note: this will only occur for ADD_IP_ADDRESS, since 1196 * DEL_IP_ADDRESS is never actually added to the list... 1197 */ 1198 if (flag) { 1199 /* success case, so remove from the restricted list */ 1200 sctp_del_local_addr_restricted(stcb, addr); 1201 1202 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1203 SCTP_MOBILITY_BASE) || 1204 sctp_is_mobility_feature_on(stcb->sctp_ep, 1205 SCTP_MOBILITY_FASTHANDOFF)) { 1206 sctp_path_check_and_react(stcb, addr); 1207 return; 1208 } 1209 /* clear any cached/topologically incorrect source addresses */ 1210 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1211 } 1212 /* else, leave it on the list */ 1213} 1214 1215/* 1216 * add an asconf add/delete/set primary IP address parameter to the queue. 1217 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1218 * returns 0 if queued, -1 if not queued/removed. 1219 * NOTE: if adding, but a delete for the same address is already scheduled 1220 * (and not yet sent out), simply remove it from queue. Same for deleting 1221 * an address already scheduled for add. If a duplicate operation is found, 1222 * ignore the new one. 1223 */ 1224static int 1225sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1226 uint16_t type) 1227{ 1228 struct sctp_asconf_addr *aa, *aa_next; 1229 1230 /* make sure the request isn't already in the queue */ 1231 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1232 /* address match? */ 1233 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1234 continue; 1235 /* 1236 * is the request already in queue but not sent? pass the 1237 * request already sent in order to resolve the following 1238 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1239 * can't remove the ADD request already sent 3. arrival of 1240 * ADD 1241 */ 1242 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1243 return (-1); 1244 } 1245 /* is the negative request already in queue, and not sent */ 1246 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1247 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1248 /* add requested, delete already queued */ 1249 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1250 /* remove the ifa from the restricted list */ 1251 sctp_del_local_addr_restricted(stcb, ifa); 1252 /* free the asconf param */ 1253 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1254 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1255 return (-1); 1256 } 1257 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1258 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1259 /* delete requested, add already queued */ 1260 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1261 /* remove the aa->ifa from the restricted list */ 1262 sctp_del_local_addr_restricted(stcb, aa->ifa); 1263 /* free the asconf param */ 1264 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1265 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1266 return (-1); 1267 } 1268 } /* for each aa */ 1269 1270 /* adding new request to the queue */ 1271 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1272 SCTP_M_ASC_ADDR); 1273 if (aa == NULL) { 1274 /* didn't get memory */ 1275 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1276 return (-1); 1277 } 1278 aa->special_del = 0; 1279 /* fill in asconf address parameter fields */ 1280 /* top level elements are "networked" during send */ 1281 aa->ap.aph.ph.param_type = type; 1282 aa->ifa = ifa; 1283 atomic_add_int(&ifa->refcount, 1); 1284 /* correlation_id filled in during send routine later... */ 1285 switch (ifa->address.sa.sa_family) { 1286#ifdef INET6 1287 case AF_INET6: 1288 { 1289 struct sockaddr_in6 *sin6; 1290 1291 sin6 = &ifa->address.sin6; 1292 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1293 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1294 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1295 sizeof(struct sctp_ipv6addr_param); 1296 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1297 sizeof(struct in6_addr)); 1298 break; 1299 } 1300#endif 1301#ifdef INET 1302 case AF_INET: 1303 { 1304 struct sockaddr_in *sin; 1305 1306 sin = &ifa->address.sin; 1307 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1308 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1309 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1310 sizeof(struct sctp_ipv4addr_param); 1311 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1312 sizeof(struct in_addr)); 1313 break; 1314 } 1315#endif 1316 default: 1317 /* invalid family! */ 1318 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1319 sctp_free_ifa(ifa); 1320 return (-1); 1321 } 1322 aa->sent = 0; /* clear sent flag */ 1323 1324 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1325#ifdef SCTP_DEBUG 1326 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1327 if (type == SCTP_ADD_IP_ADDRESS) { 1328 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1329 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1330 } else if (type == SCTP_DEL_IP_ADDRESS) { 1331 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1332 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1333 } else { 1334 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1335 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1336 } 1337 } 1338#endif 1339 1340 return (0); 1341} 1342 1343 1344/* 1345 * add an asconf operation for the given ifa and type. 1346 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1347 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1348 * advisable. 1349 */ 1350static int 1351sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1352 uint16_t type) 1353{ 1354 uint32_t status; 1355 int pending_delete_queued = 0; 1356 int last; 1357 1358 /* see if peer supports ASCONF */ 1359 if (stcb->asoc.asconf_supported == 0) { 1360 return (-1); 1361 } 1362 1363 /* 1364 * if this is deleting the last address from the assoc, mark it as 1365 * pending. 1366 */ 1367 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { 1368 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1369 last = (sctp_local_addr_count(stcb) == 0); 1370 } else { 1371 last = (sctp_local_addr_count(stcb) == 1); 1372 } 1373 if (last) { 1374 /* set the pending delete info only */ 1375 stcb->asoc.asconf_del_pending = 1; 1376 stcb->asoc.asconf_addr_del_pending = ifa; 1377 atomic_add_int(&ifa->refcount, 1); 1378 SCTPDBG(SCTP_DEBUG_ASCONF2, 1379 "asconf_queue_add: mark delete last address pending\n"); 1380 return (-1); 1381 } 1382 } 1383 1384 /* queue an asconf parameter */ 1385 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1386 1387 /* 1388 * if this is an add, and there is a delete also pending (i.e. the 1389 * last local address is being changed), queue the pending delete 1390 * too. 1391 */ 1392 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1393 /* queue in the pending delete */ 1394 if (sctp_asconf_queue_mgmt(stcb, 1395 stcb->asoc.asconf_addr_del_pending, 1396 SCTP_DEL_IP_ADDRESS) == 0) { 1397 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n"); 1398 pending_delete_queued = 1; 1399 /* clear out the pending delete info */ 1400 stcb->asoc.asconf_del_pending = 0; 1401 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1402 stcb->asoc.asconf_addr_del_pending = NULL; 1403 } 1404 } 1405 1406 if (pending_delete_queued) { 1407 struct sctp_nets *net; 1408 1409 /* 1410 * since we know that the only/last address is now being 1411 * changed in this case, reset the cwnd/rto on all nets to 1412 * start as a new address and path. Also clear the error 1413 * counts to give the assoc the best chance to complete the 1414 * address change. 1415 */ 1416 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1417 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1418 net); 1419 net->RTO = 0; 1420 net->error_count = 0; 1421 } 1422 stcb->asoc.overall_error_count = 0; 1423 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1424 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1425 stcb->asoc.overall_error_count, 1426 0, 1427 SCTP_FROM_SCTP_ASCONF, 1428 __LINE__); 1429 } 1430 1431 /* queue in an advisory set primary too */ 1432 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1433 /* let caller know we should send this out immediately */ 1434 status = 1; 1435 } 1436 return (status); 1437} 1438 1439/*- 1440 * add an asconf delete IP address parameter to the queue by sockaddr and 1441 * possibly with no sctp_ifa available. This is only called by the routine 1442 * that checks the addresses in an INIT-ACK against the current address list. 1443 * returns 0 if completed, non-zero if not completed. 1444 * NOTE: if an add is already scheduled (and not yet sent out), simply 1445 * remove it from queue. If a duplicate operation is found, ignore the 1446 * new one. 1447 */ 1448static int 1449sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1450{ 1451 struct sctp_ifa *ifa; 1452 struct sctp_asconf_addr *aa, *aa_next; 1453 1454 if (stcb == NULL) { 1455 return (-1); 1456 } 1457 /* see if peer supports ASCONF */ 1458 if (stcb->asoc.asconf_supported == 0) { 1459 return (-1); 1460 } 1461 /* make sure the request isn't already in the queue */ 1462 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1463 /* address match? */ 1464 if (sctp_asconf_addr_match(aa, sa) == 0) 1465 continue; 1466 /* is the request already in queue (sent or not) */ 1467 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1468 return (-1); 1469 } 1470 /* is the negative request already in queue, and not sent */ 1471 if (aa->sent == 1) 1472 continue; 1473 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1474 /* add already queued, so remove existing entry */ 1475 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1476 sctp_del_local_addr_restricted(stcb, aa->ifa); 1477 /* free the entry */ 1478 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1479 return (-1); 1480 } 1481 } /* for each aa */ 1482 1483 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1484 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1485 1486 /* adding new request to the queue */ 1487 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1488 SCTP_M_ASC_ADDR); 1489 if (aa == NULL) { 1490 /* didn't get memory */ 1491 SCTPDBG(SCTP_DEBUG_ASCONF1, 1492 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1493 return (-1); 1494 } 1495 aa->special_del = 0; 1496 /* fill in asconf address parameter fields */ 1497 /* top level elements are "networked" during send */ 1498 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1499 aa->ifa = ifa; 1500 if (ifa) 1501 atomic_add_int(&ifa->refcount, 1); 1502 /* correlation_id filled in during send routine later... */ 1503 switch (sa->sa_family) { 1504#ifdef INET6 1505 case AF_INET6: 1506 { 1507 /* IPv6 address */ 1508 struct sockaddr_in6 *sin6; 1509 1510 sin6 = (struct sockaddr_in6 *)sa; 1511 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1512 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1513 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1514 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1515 sizeof(struct in6_addr)); 1516 break; 1517 } 1518#endif 1519#ifdef INET 1520 case AF_INET: 1521 { 1522 /* IPv4 address */ 1523 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1524 1525 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1526 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1527 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1528 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1529 sizeof(struct in_addr)); 1530 break; 1531 } 1532#endif 1533 default: 1534 /* invalid family! */ 1535 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1536 if (ifa) 1537 sctp_free_ifa(ifa); 1538 return (-1); 1539 } 1540 aa->sent = 0; /* clear sent flag */ 1541 1542 /* delete goes to the back of the queue */ 1543 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1544 1545 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1546 return (0); 1547} 1548 1549/* 1550 * find a specific asconf param on our "sent" queue 1551 */ 1552static struct sctp_asconf_addr * 1553sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1554{ 1555 struct sctp_asconf_addr *aa; 1556 1557 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1558 if (aa->ap.aph.correlation_id == correlation_id && 1559 aa->sent == 1) { 1560 /* found it */ 1561 return (aa); 1562 } 1563 } 1564 /* didn't find it */ 1565 return (NULL); 1566} 1567 1568/* 1569 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1570 * notifications based on the error response 1571 */ 1572static void 1573sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1574 struct sctp_asconf_paramhdr *aph) 1575{ 1576 struct sctp_error_cause *eh; 1577 struct sctp_paramhdr *ph; 1578 uint16_t param_type; 1579 uint16_t error_code; 1580 1581 eh = (struct sctp_error_cause *)(aph + 1); 1582 ph = (struct sctp_paramhdr *)(eh + 1); 1583 /* validate lengths */ 1584 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1585 htons(aph->ph.param_length)) { 1586 /* invalid error cause length */ 1587 SCTPDBG(SCTP_DEBUG_ASCONF1, 1588 "asconf_process_error: cause element too long\n"); 1589 return; 1590 } 1591 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1592 htons(eh->length)) { 1593 /* invalid included TLV length */ 1594 SCTPDBG(SCTP_DEBUG_ASCONF1, 1595 "asconf_process_error: included TLV too long\n"); 1596 return; 1597 } 1598 /* which error code ? */ 1599 error_code = ntohs(eh->code); 1600 param_type = ntohs(aph->ph.param_type); 1601 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1602 switch (error_code) { 1603 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1604 /* we allow ourselves to "try again" for this error */ 1605 break; 1606 default: 1607 /* peer can't handle it... */ 1608 switch (param_type) { 1609 case SCTP_ADD_IP_ADDRESS: 1610 case SCTP_DEL_IP_ADDRESS: 1611 case SCTP_SET_PRIM_ADDR: 1612 break; 1613 default: 1614 break; 1615 } 1616 } 1617} 1618 1619/* 1620 * process an asconf queue param. 1621 * aparam: parameter to process, will be removed from the queue. 1622 * flag: 1=success case, 0=failure case 1623 */ 1624static void 1625sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1626 struct sctp_asconf_addr *aparam, uint32_t flag) 1627{ 1628 uint16_t param_type; 1629 1630 /* process this param */ 1631 param_type = aparam->ap.aph.ph.param_type; 1632 switch (param_type) { 1633 case SCTP_ADD_IP_ADDRESS: 1634 SCTPDBG(SCTP_DEBUG_ASCONF1, 1635 "process_param_ack: added IP address\n"); 1636 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1637 break; 1638 case SCTP_DEL_IP_ADDRESS: 1639 SCTPDBG(SCTP_DEBUG_ASCONF1, 1640 "process_param_ack: deleted IP address\n"); 1641 /* nothing really to do... lists already updated */ 1642 break; 1643 case SCTP_SET_PRIM_ADDR: 1644 SCTPDBG(SCTP_DEBUG_ASCONF1, 1645 "process_param_ack: set primary IP address\n"); 1646 /* nothing to do... peer may start using this addr */ 1647 break; 1648 default: 1649 /* should NEVER happen */ 1650 break; 1651 } 1652 1653 /* remove the param and free it */ 1654 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1655 if (aparam->ifa) 1656 sctp_free_ifa(aparam->ifa); 1657 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1658} 1659 1660/* 1661 * cleanup from a bad asconf ack parameter 1662 */ 1663static void 1664sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1665{ 1666 /* assume peer doesn't really know how to do asconfs */ 1667 /* XXX we could free the pending queue here */ 1668 1669} 1670 1671void 1672sctp_handle_asconf_ack(struct mbuf *m, int offset, 1673 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1674 struct sctp_nets *net, int *abort_no_unlock) 1675{ 1676 struct sctp_association *asoc; 1677 uint32_t serial_num; 1678 uint16_t ack_length; 1679 struct sctp_asconf_paramhdr *aph; 1680 struct sctp_asconf_addr *aa, *aa_next; 1681 uint32_t last_error_id = 0; /* last error correlation id */ 1682 uint32_t id; 1683 struct sctp_asconf_addr *ap; 1684 1685 /* asconf param buffer */ 1686 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1687 1688 /* verify minimum length */ 1689 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1690 SCTPDBG(SCTP_DEBUG_ASCONF1, 1691 "handle_asconf_ack: chunk too small = %xh\n", 1692 ntohs(cp->ch.chunk_length)); 1693 return; 1694 } 1695 asoc = &stcb->asoc; 1696 serial_num = ntohl(cp->serial_number); 1697 1698 /* 1699 * NOTE: we may want to handle this differently- currently, we will 1700 * abort when we get an ack for the expected serial number + 1 (eg. 1701 * we didn't send it), process an ack normally if it is the expected 1702 * serial number, and re-send the previous ack for *ALL* other 1703 * serial numbers 1704 */ 1705 1706 /* 1707 * if the serial number is the next expected, but I didn't send it, 1708 * abort the asoc, since someone probably just hijacked us... 1709 */ 1710 if (serial_num == (asoc->asconf_seq_out + 1)) { 1711 struct mbuf *op_err; 1712 char msg[SCTP_DIAG_INFO_LEN]; 1713 1714 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1715 SCTP_SNPRINTF(msg, sizeof(msg), "Never sent serial number %8.8x", serial_num); 1716 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg); 1717 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); 1718 *abort_no_unlock = 1; 1719 return; 1720 } 1721 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1722 /* got a duplicate/unexpected ASCONF-ACK */ 1723 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1724 serial_num, asoc->asconf_seq_out_acked + 1); 1725 return; 1726 } 1727 1728 if (serial_num == asoc->asconf_seq_out - 1) { 1729 /* stop our timer */ 1730 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, 1731 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); 1732 } 1733 1734 /* process the ASCONF-ACK contents */ 1735 ack_length = ntohs(cp->ch.chunk_length) - 1736 sizeof(struct sctp_asconf_ack_chunk); 1737 offset += sizeof(struct sctp_asconf_ack_chunk); 1738 /* process through all parameters */ 1739 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1740 unsigned int param_length, param_type; 1741 1742 /* get pointer to next asconf parameter */ 1743 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1744 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1745 if (aph == NULL) { 1746 /* can't get an asconf paramhdr */ 1747 sctp_asconf_ack_clear(stcb); 1748 return; 1749 } 1750 param_type = ntohs(aph->ph.param_type); 1751 param_length = ntohs(aph->ph.param_length); 1752 if (param_length > ack_length) { 1753 sctp_asconf_ack_clear(stcb); 1754 return; 1755 } 1756 if (param_length < sizeof(struct sctp_paramhdr)) { 1757 sctp_asconf_ack_clear(stcb); 1758 return; 1759 } 1760 /* get the complete parameter... */ 1761 if (param_length > sizeof(aparam_buf)) { 1762 SCTPDBG(SCTP_DEBUG_ASCONF1, 1763 "param length (%u) larger than buffer size!\n", param_length); 1764 sctp_asconf_ack_clear(stcb); 1765 return; 1766 } 1767 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1768 if (aph == NULL) { 1769 sctp_asconf_ack_clear(stcb); 1770 return; 1771 } 1772 /* correlation_id is transparent to peer, no ntohl needed */ 1773 id = aph->correlation_id; 1774 1775 switch (param_type) { 1776 case SCTP_ERROR_CAUSE_IND: 1777 last_error_id = id; 1778 /* find the corresponding asconf param in our queue */ 1779 ap = sctp_asconf_find_param(stcb, id); 1780 if (ap == NULL) { 1781 /* hmm... can't find this in our queue! */ 1782 break; 1783 } 1784 /* process the parameter, failed flag */ 1785 sctp_asconf_process_param_ack(stcb, ap, 0); 1786 /* process the error response */ 1787 sctp_asconf_process_error(stcb, aph); 1788 break; 1789 case SCTP_SUCCESS_REPORT: 1790 /* find the corresponding asconf param in our queue */ 1791 ap = sctp_asconf_find_param(stcb, id); 1792 if (ap == NULL) { 1793 /* hmm... can't find this in our queue! */ 1794 break; 1795 } 1796 /* process the parameter, success flag */ 1797 sctp_asconf_process_param_ack(stcb, ap, 1); 1798 break; 1799 default: 1800 break; 1801 } /* switch */ 1802 1803 /* update remaining ASCONF-ACK message length to process */ 1804 if (ack_length > SCTP_SIZE32(param_length)) { 1805 ack_length -= SCTP_SIZE32(param_length); 1806 } else { 1807 break; 1808 } 1809 offset += SCTP_SIZE32(param_length); 1810 } /* while */ 1811 1812 /* 1813 * if there are any "sent" params still on the queue, these are 1814 * implicitly "success", or "failed" (if we got an error back) ... 1815 * so process these appropriately 1816 * 1817 * we assume that the correlation_id's are monotonically increasing 1818 * beginning from 1 and that we don't have *that* many outstanding 1819 * at any given time 1820 */ 1821 if (last_error_id == 0) 1822 last_error_id--; /* set to "max" value */ 1823 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1824 if (aa->sent == 1) { 1825 /* 1826 * implicitly successful or failed if correlation_id 1827 * < last_error_id, then success else, failure 1828 */ 1829 if (aa->ap.aph.correlation_id < last_error_id) 1830 sctp_asconf_process_param_ack(stcb, aa, 1); 1831 else 1832 sctp_asconf_process_param_ack(stcb, aa, 0); 1833 } else { 1834 /* 1835 * since we always process in order (FIFO queue) if 1836 * we reach one that hasn't been sent, the rest 1837 * should not have been sent either. so, we're 1838 * done... 1839 */ 1840 break; 1841 } 1842 } 1843 1844 /* update the next sequence number to use */ 1845 asoc->asconf_seq_out_acked++; 1846 /* remove the old ASCONF on our outbound queue */ 1847 sctp_toss_old_asconf(stcb); 1848 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1849#ifdef SCTP_TIMER_BASED_ASCONF 1850 /* we have more params, so restart our timer */ 1851 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1852 stcb, net); 1853#else 1854 /* we have more params, so send out more */ 1855 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1856#endif 1857 } 1858} 1859 1860#ifdef INET6 1861static uint32_t 1862sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1863{ 1864 struct sockaddr_in6 *sin6, *net6; 1865 struct sctp_nets *net; 1866 1867 if (sa->sa_family != AF_INET6) { 1868 /* wrong family */ 1869 return (0); 1870 } 1871 sin6 = (struct sockaddr_in6 *)sa; 1872 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1873 /* not link local address */ 1874 return (0); 1875 } 1876 /* hunt through our destination nets list for this scope_id */ 1877 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1878 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1879 AF_INET6) 1880 continue; 1881 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1882 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1883 continue; 1884 if (sctp_is_same_scope(sin6, net6)) { 1885 /* found one */ 1886 return (1); 1887 } 1888 } 1889 /* didn't find one */ 1890 return (0); 1891} 1892#endif 1893 1894/* 1895 * address management functions 1896 */ 1897static void 1898sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1899 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1900{ 1901 int status; 1902 1903 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1904 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1905 /* subset bound, no ASCONF allowed case, so ignore */ 1906 return; 1907 } 1908 /* 1909 * note: we know this is not the subset bound, no ASCONF case eg. 1910 * this is boundall or subset bound w/ASCONF allowed 1911 */ 1912 1913 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1914 switch (ifa->address.sa.sa_family) { 1915#ifdef INET6 1916 case AF_INET6: 1917 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1918 &ifa->address.sin6.sin6_addr) != 0) { 1919 return; 1920 } 1921 break; 1922#endif 1923#ifdef INET 1924 case AF_INET: 1925 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1926 &ifa->address.sin.sin_addr) != 0) { 1927 return; 1928 } 1929 break; 1930#endif 1931 default: 1932 return; 1933 } 1934#ifdef INET6 1935 /* make sure we're "allowed" to add this type of addr */ 1936 if (ifa->address.sa.sa_family == AF_INET6) { 1937 /* invalid if we're not a v6 endpoint */ 1938 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1939 return; 1940 /* is the v6 addr really valid ? */ 1941 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1942 return; 1943 } 1944 } 1945#endif 1946 /* put this address on the "pending/do not use yet" list */ 1947 sctp_add_local_addr_restricted(stcb, ifa); 1948 /* 1949 * check address scope if address is out of scope, don't queue 1950 * anything... note: this would leave the address on both inp and 1951 * asoc lists 1952 */ 1953 switch (ifa->address.sa.sa_family) { 1954#ifdef INET6 1955 case AF_INET6: 1956 { 1957 struct sockaddr_in6 *sin6; 1958 1959 sin6 = &ifa->address.sin6; 1960 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1961 /* we skip unspecifed addresses */ 1962 return; 1963 } 1964 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1965 if (stcb->asoc.scope.local_scope == 0) { 1966 return; 1967 } 1968 /* is it the right link local scope? */ 1969 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1970 return; 1971 } 1972 } 1973 if (stcb->asoc.scope.site_scope == 0 && 1974 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1975 return; 1976 } 1977 break; 1978 } 1979#endif 1980#ifdef INET 1981 case AF_INET: 1982 { 1983 struct sockaddr_in *sin; 1984 1985 /* invalid if we are a v6 only endpoint */ 1986 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1987 SCTP_IPV6_V6ONLY(inp)) 1988 return; 1989 1990 sin = &ifa->address.sin; 1991 if (sin->sin_addr.s_addr == 0) { 1992 /* we skip unspecifed addresses */ 1993 return; 1994 } 1995 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1996 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1997 return; 1998 } 1999 break; 2000 } 2001#endif 2002 default: 2003 /* else, not AF_INET or AF_INET6, so skip */ 2004 return; 2005 } 2006 2007 /* queue an asconf for this address add/delete */ 2008 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 2009 /* does the peer do asconf? */ 2010 if (stcb->asoc.asconf_supported) { 2011 /* queue an asconf for this addr */ 2012 status = sctp_asconf_queue_add(stcb, ifa, type); 2013 2014 /* 2015 * if queued ok, and in the open state, send out the 2016 * ASCONF. If in the non-open state, these will be 2017 * sent when the state goes open. 2018 */ 2019 if (status == 0 && 2020 ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2021 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) { 2022#ifdef SCTP_TIMER_BASED_ASCONF 2023 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 2024 stcb, stcb->asoc.primary_destination); 2025#else 2026 sctp_send_asconf(stcb, NULL, addr_locked); 2027#endif 2028 } 2029 } 2030 } 2031} 2032 2033 2034int 2035sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2036{ 2037 struct sctp_asconf_iterator *asc; 2038 struct sctp_ifa *ifa; 2039 struct sctp_laddr *l; 2040 int cnt_invalid = 0; 2041 2042 asc = (struct sctp_asconf_iterator *)ptr; 2043 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2044 ifa = l->ifa; 2045 switch (ifa->address.sa.sa_family) { 2046#ifdef INET6 2047 case AF_INET6: 2048 /* invalid if we're not a v6 endpoint */ 2049 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2050 cnt_invalid++; 2051 if (asc->cnt == cnt_invalid) 2052 return (1); 2053 } 2054 break; 2055#endif 2056#ifdef INET 2057 case AF_INET: 2058 { 2059 /* invalid if we are a v6 only endpoint */ 2060 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2061 SCTP_IPV6_V6ONLY(inp)) { 2062 cnt_invalid++; 2063 if (asc->cnt == cnt_invalid) 2064 return (1); 2065 } 2066 break; 2067 } 2068#endif 2069 default: 2070 /* invalid address family */ 2071 cnt_invalid++; 2072 if (asc->cnt == cnt_invalid) 2073 return (1); 2074 } 2075 } 2076 return (0); 2077} 2078 2079static int 2080sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2081{ 2082 struct sctp_ifa *ifa; 2083 struct sctp_asconf_iterator *asc; 2084 struct sctp_laddr *laddr, *nladdr, *l; 2085 2086 /* Only for specific case not bound all */ 2087 asc = (struct sctp_asconf_iterator *)ptr; 2088 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2089 ifa = l->ifa; 2090 if (l->action == SCTP_ADD_IP_ADDRESS) { 2091 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2092 sctp_nxt_addr) { 2093 if (laddr->ifa == ifa) { 2094 laddr->action = 0; 2095 break; 2096 } 2097 2098 } 2099 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2100 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2101 /* remove only after all guys are done */ 2102 if (laddr->ifa == ifa) { 2103 sctp_del_local_addr_ep(inp, ifa); 2104 } 2105 } 2106 } 2107 } 2108 return (0); 2109} 2110 2111void 2112sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2113 void *ptr, uint32_t val SCTP_UNUSED) 2114{ 2115 struct sctp_asconf_iterator *asc; 2116 struct sctp_ifa *ifa; 2117 struct sctp_laddr *l; 2118 int cnt_invalid = 0; 2119 int type, status; 2120 int num_queued = 0; 2121 2122 asc = (struct sctp_asconf_iterator *)ptr; 2123 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2124 ifa = l->ifa; 2125 type = l->action; 2126 2127 /* address's vrf_id must be the vrf_id of the assoc */ 2128 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2129 continue; 2130 } 2131 2132 /* Same checks again for assoc */ 2133 switch (ifa->address.sa.sa_family) { 2134#ifdef INET6 2135 case AF_INET6: 2136 { 2137 /* invalid if we're not a v6 endpoint */ 2138 struct sockaddr_in6 *sin6; 2139 2140 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2141 cnt_invalid++; 2142 if (asc->cnt == cnt_invalid) 2143 return; 2144 else 2145 continue; 2146 } 2147 sin6 = &ifa->address.sin6; 2148 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2149 /* we skip unspecifed addresses */ 2150 continue; 2151 } 2152 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2153 &sin6->sin6_addr) != 0) { 2154 continue; 2155 } 2156 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2157 if (stcb->asoc.scope.local_scope == 0) { 2158 continue; 2159 } 2160 /* is it the right link local scope? */ 2161 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2162 continue; 2163 } 2164 } 2165 break; 2166 } 2167#endif 2168#ifdef INET 2169 case AF_INET: 2170 { 2171 /* invalid if we are a v6 only endpoint */ 2172 struct sockaddr_in *sin; 2173 2174 /* invalid if we are a v6 only endpoint */ 2175 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2176 SCTP_IPV6_V6ONLY(inp)) 2177 continue; 2178 2179 sin = &ifa->address.sin; 2180 if (sin->sin_addr.s_addr == 0) { 2181 /* we skip unspecifed addresses */ 2182 continue; 2183 } 2184 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2185 &sin->sin_addr) != 0) { 2186 continue; 2187 } 2188 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2189 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2190 continue; 2191 } 2192 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2193 SCTP_IPV6_V6ONLY(inp)) { 2194 cnt_invalid++; 2195 if (asc->cnt == cnt_invalid) 2196 return; 2197 else 2198 continue; 2199 } 2200 break; 2201 } 2202#endif 2203 default: 2204 /* invalid address family */ 2205 cnt_invalid++; 2206 if (asc->cnt == cnt_invalid) 2207 return; 2208 else 2209 continue; 2210 break; 2211 } 2212 2213 if (type == SCTP_ADD_IP_ADDRESS) { 2214 /* prevent this address from being used as a source */ 2215 sctp_add_local_addr_restricted(stcb, ifa); 2216 } else if (type == SCTP_DEL_IP_ADDRESS) { 2217 struct sctp_nets *net; 2218 2219 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2220 sctp_rtentry_t *rt; 2221 2222 /* delete this address if cached */ 2223 if (net->ro._s_addr == ifa) { 2224 sctp_free_ifa(net->ro._s_addr); 2225 net->ro._s_addr = NULL; 2226 net->src_addr_selected = 0; 2227 rt = net->ro.ro_rt; 2228 if (rt) { 2229 RTFREE(rt); 2230 net->ro.ro_rt = NULL; 2231 } 2232 /* 2233 * Now we deleted our src address, 2234 * should we not also now reset the 2235 * cwnd/rto to start as if its a new 2236 * address? 2237 */ 2238 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2239 net->RTO = 0; 2240 2241 } 2242 } 2243 } else if (type == SCTP_SET_PRIM_ADDR) { 2244 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2245 /* must validate the ifa is in the ep */ 2246 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2247 continue; 2248 } 2249 } else { 2250 /* Need to check scopes for this guy */ 2251 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2252 continue; 2253 } 2254 } 2255 } 2256 /* queue an asconf for this address add/delete */ 2257 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2258 stcb->asoc.asconf_supported == 1) { 2259 /* queue an asconf for this addr */ 2260 status = sctp_asconf_queue_add(stcb, ifa, type); 2261 /* 2262 * if queued ok, and in the open state, update the 2263 * count of queued params. If in the non-open 2264 * state, these get sent when the assoc goes open. 2265 */ 2266 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2267 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2268 if (status >= 0) { 2269 num_queued++; 2270 } 2271 } 2272 } 2273 } 2274 /* 2275 * If we have queued params in the open state, send out an ASCONF. 2276 */ 2277 if (num_queued > 0) { 2278 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2279 } 2280} 2281 2282void 2283sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2284{ 2285 struct sctp_asconf_iterator *asc; 2286 struct sctp_ifa *ifa; 2287 struct sctp_laddr *l, *nl; 2288 2289 asc = (struct sctp_asconf_iterator *)ptr; 2290 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2291 ifa = l->ifa; 2292 if (l->action == SCTP_ADD_IP_ADDRESS) { 2293 /* Clear the defer use flag */ 2294 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2295 } 2296 sctp_free_ifa(ifa); 2297 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2298 SCTP_DECR_LADDR_COUNT(); 2299 } 2300 SCTP_FREE(asc, SCTP_M_ASC_IT); 2301} 2302 2303/* 2304 * sa is the sockaddr to ask the peer to set primary to. 2305 * returns: 0 = completed, -1 = error 2306 */ 2307int32_t 2308sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2309{ 2310 uint32_t vrf_id; 2311 struct sctp_ifa *ifa; 2312 2313 /* find the ifa for the desired set primary */ 2314 vrf_id = stcb->asoc.vrf_id; 2315 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2316 if (ifa == NULL) { 2317 /* Invalid address */ 2318 return (-1); 2319 } 2320 2321 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2322 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2323 /* set primary queuing succeeded */ 2324 SCTPDBG(SCTP_DEBUG_ASCONF1, 2325 "set_primary_ip_address_sa: queued on tcb=%p, ", 2326 (void *)stcb); 2327 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2328 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 2329 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2330#ifdef SCTP_TIMER_BASED_ASCONF 2331 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2332 stcb->sctp_ep, stcb, 2333 stcb->asoc.primary_destination); 2334#else 2335 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2336#endif 2337 } 2338 } else { 2339 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2340 (void *)stcb); 2341 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2342 return (-1); 2343 } 2344 return (0); 2345} 2346 2347int 2348sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2349{ 2350 struct sctp_tmit_chunk *chk, *nchk; 2351 unsigned int offset, asconf_limit; 2352 struct sctp_asconf_chunk *acp; 2353 struct sctp_asconf_paramhdr *aph; 2354 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2355 struct sctp_paramhdr *ph; 2356 int add_cnt, del_cnt; 2357 uint16_t last_param_type; 2358 2359 add_cnt = del_cnt = 0; 2360 last_param_type = 0; 2361 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2362 if (chk->data == NULL) { 2363 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2364 continue; 2365 } 2366 offset = 0; 2367 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2368 offset += sizeof(struct sctp_asconf_chunk); 2369 asconf_limit = ntohs(acp->ch.chunk_length); 2370 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2371 if (ph == NULL) { 2372 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2373 continue; 2374 } 2375 offset += ntohs(ph->param_length); 2376 2377 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2378 if (aph == NULL) { 2379 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2380 continue; 2381 } 2382 while (aph != NULL) { 2383 unsigned int param_length, param_type; 2384 2385 param_type = ntohs(aph->ph.param_type); 2386 param_length = ntohs(aph->ph.param_length); 2387 if (offset + param_length > asconf_limit) { 2388 /* parameter goes beyond end of chunk! */ 2389 break; 2390 } 2391 if (param_length > sizeof(aparam_buf)) { 2392 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2393 break; 2394 } 2395 if (param_length <= sizeof(struct sctp_paramhdr)) { 2396 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2397 break; 2398 } 2399 2400 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2401 if (aph == NULL) { 2402 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2403 break; 2404 } 2405 2406 ph = (struct sctp_paramhdr *)(aph + 1); 2407 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2408 switch (param_type) { 2409 case SCTP_ADD_IP_ADDRESS: 2410 add_cnt++; 2411 break; 2412 case SCTP_DEL_IP_ADDRESS: 2413 del_cnt++; 2414 break; 2415 default: 2416 break; 2417 } 2418 last_param_type = param_type; 2419 } 2420 2421 offset += SCTP_SIZE32(param_length); 2422 if (offset >= asconf_limit) { 2423 /* no more data in the mbuf chain */ 2424 break; 2425 } 2426 /* get pointer to next asconf param */ 2427 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2428 } 2429 } 2430 2431 /* 2432 * we want to find the sequences which consist of ADD -> DEL -> ADD 2433 * or DEL -> ADD 2434 */ 2435 if (add_cnt > del_cnt || 2436 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2437 return (1); 2438 } 2439 return (0); 2440} 2441 2442static struct sockaddr * 2443sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2444{ 2445 struct sctp_vrf *vrf = NULL; 2446 struct sctp_ifn *sctp_ifn; 2447 struct sctp_ifa *sctp_ifa; 2448 2449 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2450 SCTP_IPI_ADDR_RLOCK(); 2451 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2452 if (vrf == NULL) { 2453 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2454 SCTP_IPI_ADDR_RUNLOCK(); 2455 return (NULL); 2456 } 2457 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2458 if (stcb->asoc.scope.loopback_scope == 0 && 2459 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2460 /* Skip if loopback_scope not set */ 2461 continue; 2462 } 2463 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2464 switch (sctp_ifa->address.sa.sa_family) { 2465#ifdef INET 2466 case AF_INET: 2467 if (stcb->asoc.scope.ipv4_addr_legal) { 2468 struct sockaddr_in *sin; 2469 2470 sin = &sctp_ifa->address.sin; 2471 if (sin->sin_addr.s_addr == 0) { 2472 /* skip unspecifed addresses */ 2473 continue; 2474 } 2475 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2476 &sin->sin_addr) != 0) { 2477 continue; 2478 } 2479 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2480 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2481 continue; 2482 2483 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2484 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2485 continue; 2486 /* 2487 * found a valid local v4 address to 2488 * use 2489 */ 2490 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2491 SCTP_IPI_ADDR_RUNLOCK(); 2492 return (&sctp_ifa->address.sa); 2493 } 2494 break; 2495#endif 2496#ifdef INET6 2497 case AF_INET6: 2498 if (stcb->asoc.scope.ipv6_addr_legal) { 2499 struct sockaddr_in6 *sin6; 2500 2501 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2502 continue; 2503 } 2504 2505 sin6 = &sctp_ifa->address.sin6; 2506 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2507 /* 2508 * we skip unspecifed 2509 * addresses 2510 */ 2511 continue; 2512 } 2513 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2514 &sin6->sin6_addr) != 0) { 2515 continue; 2516 } 2517 if (stcb->asoc.scope.local_scope == 0 && 2518 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2519 continue; 2520 if (stcb->asoc.scope.site_scope == 0 && 2521 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2522 continue; 2523 2524 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2525 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2526 continue; 2527 /* 2528 * found a valid local v6 address to 2529 * use 2530 */ 2531 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2532 SCTP_IPI_ADDR_RUNLOCK(); 2533 return (&sctp_ifa->address.sa); 2534 } 2535 break; 2536#endif 2537 default: 2538 break; 2539 } 2540 } 2541 } 2542 /* no valid addresses found */ 2543 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2544 SCTP_IPI_ADDR_RUNLOCK(); 2545 return (NULL); 2546} 2547 2548static struct sockaddr * 2549sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2550{ 2551 struct sctp_laddr *laddr; 2552 2553 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2554 if (laddr->ifa == NULL) { 2555 continue; 2556 } 2557 /* is the address restricted ? */ 2558 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2559 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2560 continue; 2561 2562 /* found a valid local address to use */ 2563 return (&laddr->ifa->address.sa); 2564 } 2565 /* no valid addresses found */ 2566 return (NULL); 2567} 2568 2569/* 2570 * builds an ASCONF chunk from queued ASCONF params. 2571 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2572 */ 2573struct mbuf * 2574sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2575{ 2576 struct mbuf *m_asconf, *m_asconf_chk; 2577 struct sctp_asconf_addr *aa; 2578 struct sctp_asconf_chunk *acp; 2579 struct sctp_asconf_paramhdr *aph; 2580 struct sctp_asconf_addr_param *aap; 2581 uint32_t p_length; 2582 uint32_t correlation_id = 1; /* 0 is reserved... */ 2583 caddr_t ptr, lookup_ptr; 2584 uint8_t lookup_used = 0; 2585 2586 /* are there any asconf params to send? */ 2587 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2588 if (aa->sent == 0) 2589 break; 2590 } 2591 if (aa == NULL) 2592 return (NULL); 2593 2594 /* 2595 * get a chunk header mbuf and a cluster for the asconf params since 2596 * it's simpler to fill in the asconf chunk header lookup address on 2597 * the fly 2598 */ 2599 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2600 if (m_asconf_chk == NULL) { 2601 /* no mbuf's */ 2602 SCTPDBG(SCTP_DEBUG_ASCONF1, 2603 "sctp_compose_asconf: couldn't get chunk mbuf!\n"); 2604 return (NULL); 2605 } 2606 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2607 if (m_asconf == NULL) { 2608 /* no mbuf's */ 2609 SCTPDBG(SCTP_DEBUG_ASCONF1, 2610 "sctp_compose_asconf: couldn't get mbuf!\n"); 2611 sctp_m_freem(m_asconf_chk); 2612 return (NULL); 2613 } 2614 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2615 SCTP_BUF_LEN(m_asconf) = 0; 2616 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2617 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2618 /* save pointers to lookup address and asconf params */ 2619 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2620 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2621 2622 /* fill in chunk header info */ 2623 acp->ch.chunk_type = SCTP_ASCONF; 2624 acp->ch.chunk_flags = 0; 2625 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2626 stcb->asoc.asconf_seq_out++; 2627 2628 /* add parameters... up to smallest MTU allowed */ 2629 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2630 if (aa->sent) 2631 continue; 2632 /* get the parameter length */ 2633 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2634 /* will it fit in current chunk? */ 2635 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2636 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2637 /* won't fit, so we're done with this chunk */ 2638 break; 2639 } 2640 /* assign (and store) a correlation id */ 2641 aa->ap.aph.correlation_id = correlation_id++; 2642 2643 /* 2644 * fill in address if we're doing a delete this is a simple 2645 * way for us to fill in the correlation address, which 2646 * should only be used by the peer if we're deleting our 2647 * source address and adding a new address (e.g. renumbering 2648 * case) 2649 */ 2650 if (lookup_used == 0 && 2651 (aa->special_del == 0) && 2652 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2653 struct sctp_ipv6addr_param *lookup; 2654 uint16_t p_size, addr_size; 2655 2656 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2657 lookup->ph.param_type = 2658 htons(aa->ap.addrp.ph.param_type); 2659 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2660 /* copy IPv6 address */ 2661 p_size = sizeof(struct sctp_ipv6addr_param); 2662 addr_size = sizeof(struct in6_addr); 2663 } else { 2664 /* copy IPv4 address */ 2665 p_size = sizeof(struct sctp_ipv4addr_param); 2666 addr_size = sizeof(struct in_addr); 2667 } 2668 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2669 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2670 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2671 lookup_used = 1; 2672 } 2673 /* copy into current space */ 2674 memcpy(ptr, &aa->ap, p_length); 2675 2676 /* network elements and update lengths */ 2677 aph = (struct sctp_asconf_paramhdr *)ptr; 2678 aap = (struct sctp_asconf_addr_param *)ptr; 2679 /* correlation_id is transparent to peer, no htonl needed */ 2680 aph->ph.param_type = htons(aph->ph.param_type); 2681 aph->ph.param_length = htons(aph->ph.param_length); 2682 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2683 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2684 2685 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2686 ptr += SCTP_SIZE32(p_length); 2687 2688 /* 2689 * these params are removed off the pending list upon 2690 * getting an ASCONF-ACK back from the peer, just set flag 2691 */ 2692 aa->sent = 1; 2693 } 2694 /* check to see if the lookup addr has been populated yet */ 2695 if (lookup_used == 0) { 2696 /* NOTE: if the address param is optional, can skip this... */ 2697 /* add any valid (existing) address... */ 2698 struct sctp_ipv6addr_param *lookup; 2699 uint16_t p_size, addr_size; 2700 struct sockaddr *found_addr; 2701 caddr_t addr_ptr; 2702 2703 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2704 found_addr = sctp_find_valid_localaddr(stcb, 2705 addr_locked); 2706 else 2707 found_addr = sctp_find_valid_localaddr_ep(stcb); 2708 2709 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2710 if (found_addr != NULL) { 2711 switch (found_addr->sa_family) { 2712#ifdef INET6 2713 case AF_INET6: 2714 /* copy IPv6 address */ 2715 lookup->ph.param_type = 2716 htons(SCTP_IPV6_ADDRESS); 2717 p_size = sizeof(struct sctp_ipv6addr_param); 2718 addr_size = sizeof(struct in6_addr); 2719 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2720 found_addr)->sin6_addr; 2721 break; 2722#endif 2723#ifdef INET 2724 case AF_INET: 2725 /* copy IPv4 address */ 2726 lookup->ph.param_type = 2727 htons(SCTP_IPV4_ADDRESS); 2728 p_size = sizeof(struct sctp_ipv4addr_param); 2729 addr_size = sizeof(struct in_addr); 2730 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2731 found_addr)->sin_addr; 2732 break; 2733#endif 2734 default: 2735 SCTPDBG(SCTP_DEBUG_ASCONF1, 2736 "sctp_compose_asconf: no usable lookup addr (family = %d)!\n", 2737 found_addr->sa_family); 2738 sctp_m_freem(m_asconf_chk); 2739 sctp_m_freem(m_asconf); 2740 return (NULL); 2741 } 2742 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2743 memcpy(lookup->addr, addr_ptr, addr_size); 2744 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2745 } else { 2746 /* uh oh... don't have any address?? */ 2747 SCTPDBG(SCTP_DEBUG_ASCONF1, 2748 "sctp_compose_asconf: no lookup addr!\n"); 2749 sctp_m_freem(m_asconf_chk); 2750 sctp_m_freem(m_asconf); 2751 return (NULL); 2752 } 2753 } 2754 /* chain it all together */ 2755 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2756 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2757 acp->ch.chunk_length = htons(*retlen); 2758 2759 return (m_asconf_chk); 2760} 2761 2762/* 2763 * section to handle address changes before an association is up eg. changes 2764 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2765 */ 2766 2767/* 2768 * processes the (local) addresses in the INIT-ACK chunk 2769 */ 2770static void 2771sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2772 unsigned int offset, unsigned int length) 2773{ 2774 struct sctp_paramhdr tmp_param, *ph; 2775 uint16_t plen, ptype; 2776 struct sctp_ifa *sctp_ifa; 2777 union sctp_sockstore store; 2778#ifdef INET6 2779 struct sctp_ipv6addr_param addr6_store; 2780#endif 2781#ifdef INET 2782 struct sctp_ipv4addr_param addr4_store; 2783#endif 2784 2785 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2786 if (stcb == NULL) /* Un-needed check for SA */ 2787 return; 2788 2789 /* convert to upper bound */ 2790 length += offset; 2791 2792 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2793 return; 2794 } 2795 /* go through the addresses in the init-ack */ 2796 ph = (struct sctp_paramhdr *) 2797 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2798 (uint8_t *)&tmp_param); 2799 while (ph != NULL) { 2800 ptype = ntohs(ph->param_type); 2801 plen = ntohs(ph->param_length); 2802 switch (ptype) { 2803#ifdef INET6 2804 case SCTP_IPV6_ADDRESS: 2805 { 2806 struct sctp_ipv6addr_param *a6p; 2807 2808 /* get the entire IPv6 address param */ 2809 a6p = (struct sctp_ipv6addr_param *) 2810 sctp_m_getptr(m, offset, 2811 sizeof(struct sctp_ipv6addr_param), 2812 (uint8_t *)&addr6_store); 2813 if (plen != sizeof(struct sctp_ipv6addr_param) || 2814 a6p == NULL) { 2815 return; 2816 } 2817 memset(&store, 0, sizeof(union sctp_sockstore)); 2818 store.sin6.sin6_family = AF_INET6; 2819 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2820 store.sin6.sin6_port = stcb->rport; 2821 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2822 break; 2823 } 2824#endif 2825#ifdef INET 2826 case SCTP_IPV4_ADDRESS: 2827 { 2828 struct sctp_ipv4addr_param *a4p; 2829 2830 /* get the entire IPv4 address param */ 2831 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2832 sizeof(struct sctp_ipv4addr_param), 2833 (uint8_t *)&addr4_store); 2834 if (plen != sizeof(struct sctp_ipv4addr_param) || 2835 a4p == NULL) { 2836 return; 2837 } 2838 memset(&store, 0, sizeof(union sctp_sockstore)); 2839 store.sin.sin_family = AF_INET; 2840 store.sin.sin_len = sizeof(struct sockaddr_in); 2841 store.sin.sin_port = stcb->rport; 2842 store.sin.sin_addr.s_addr = a4p->addr; 2843 break; 2844 } 2845#endif 2846 default: 2847 goto next_addr; 2848 } 2849 2850 /* see if this address really (still) exists */ 2851 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2852 SCTP_ADDR_NOT_LOCKED); 2853 if (sctp_ifa == NULL) { 2854 /* address doesn't exist anymore */ 2855 int status; 2856 2857 /* are ASCONFs allowed ? */ 2858 if ((sctp_is_feature_on(stcb->sctp_ep, 2859 SCTP_PCB_FLAGS_DO_ASCONF)) && 2860 stcb->asoc.asconf_supported) { 2861 /* queue an ASCONF DEL_IP_ADDRESS */ 2862 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2863 /* 2864 * if queued ok, and in correct state, send 2865 * out the ASCONF. 2866 */ 2867 if (status == 0 && 2868 SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) { 2869#ifdef SCTP_TIMER_BASED_ASCONF 2870 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2871 stcb->sctp_ep, stcb, 2872 stcb->asoc.primary_destination); 2873#else 2874 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2875#endif 2876 } 2877 } 2878 } 2879 2880next_addr: 2881 /* 2882 * Sanity check: Make sure the length isn't 0, otherwise 2883 * we'll be stuck in this loop for a long time... 2884 */ 2885 if (SCTP_SIZE32(plen) == 0) { 2886 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2887 plen, ptype); 2888 return; 2889 } 2890 /* get next parameter */ 2891 offset += SCTP_SIZE32(plen); 2892 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2893 return; 2894 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2895 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2896 } /* while */ 2897} 2898 2899/* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2900/* 2901 * checks to see if a specific address is in the initack address list returns 2902 * 1 if found, 0 if not 2903 */ 2904static uint32_t 2905sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2906{ 2907 struct sctp_paramhdr tmp_param, *ph; 2908 uint16_t plen, ptype; 2909#ifdef INET 2910 struct sockaddr_in *sin; 2911 struct sctp_ipv4addr_param *a4p; 2912 struct sctp_ipv6addr_param addr4_store; 2913#endif 2914#ifdef INET6 2915 struct sockaddr_in6 *sin6; 2916 struct sctp_ipv6addr_param *a6p; 2917 struct sctp_ipv6addr_param addr6_store; 2918 struct sockaddr_in6 sin6_tmp; 2919#endif 2920 2921 switch (sa->sa_family) { 2922#ifdef INET 2923 case AF_INET: 2924 break; 2925#endif 2926#ifdef INET6 2927 case AF_INET6: 2928 break; 2929#endif 2930 default: 2931 return (0); 2932 } 2933 2934 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2935 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2936 /* convert to upper bound */ 2937 length += offset; 2938 2939 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2940 SCTPDBG(SCTP_DEBUG_ASCONF1, 2941 "find_initack_addr: invalid offset?\n"); 2942 return (0); 2943 } 2944 /* go through the addresses in the init-ack */ 2945 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2946 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2947 while (ph != NULL) { 2948 ptype = ntohs(ph->param_type); 2949 plen = ntohs(ph->param_length); 2950 switch (ptype) { 2951#ifdef INET6 2952 case SCTP_IPV6_ADDRESS: 2953 if (sa->sa_family == AF_INET6) { 2954 /* get the entire IPv6 address param */ 2955 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2956 break; 2957 } 2958 /* get the entire IPv6 address param */ 2959 a6p = (struct sctp_ipv6addr_param *) 2960 sctp_m_getptr(m, offset, 2961 sizeof(struct sctp_ipv6addr_param), 2962 (uint8_t *)&addr6_store); 2963 if (a6p == NULL) { 2964 return (0); 2965 } 2966 sin6 = (struct sockaddr_in6 *)sa; 2967 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2968 /* create a copy and clear scope */ 2969 memcpy(&sin6_tmp, sin6, 2970 sizeof(struct sockaddr_in6)); 2971 sin6 = &sin6_tmp; 2972 in6_clearscope(&sin6->sin6_addr); 2973 } 2974 if (memcmp(&sin6->sin6_addr, a6p->addr, 2975 sizeof(struct in6_addr)) == 0) { 2976 /* found it */ 2977 return (1); 2978 } 2979 } 2980 break; 2981#endif /* INET6 */ 2982#ifdef INET 2983 case SCTP_IPV4_ADDRESS: 2984 if (sa->sa_family == AF_INET) { 2985 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2986 break; 2987 } 2988 /* get the entire IPv4 address param */ 2989 a4p = (struct sctp_ipv4addr_param *) 2990 sctp_m_getptr(m, offset, 2991 sizeof(struct sctp_ipv4addr_param), 2992 (uint8_t *)&addr4_store); 2993 if (a4p == NULL) { 2994 return (0); 2995 } 2996 sin = (struct sockaddr_in *)sa; 2997 if (sin->sin_addr.s_addr == a4p->addr) { 2998 /* found it */ 2999 return (1); 3000 } 3001 } 3002 break; 3003#endif 3004 default: 3005 break; 3006 } 3007 /* get next parameter */ 3008 offset += SCTP_SIZE32(plen); 3009 if (offset + sizeof(struct sctp_paramhdr) > length) { 3010 return (0); 3011 } 3012 ph = (struct sctp_paramhdr *) 3013 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3014 (uint8_t *)&tmp_param); 3015 } /* while */ 3016 /* not found! */ 3017 return (0); 3018} 3019 3020/* 3021 * makes sure that the current endpoint local addr list is consistent with 3022 * the new association (eg. subset bound, asconf allowed) adds addresses as 3023 * necessary 3024 */ 3025static void 3026sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3027 int length, struct sockaddr *init_addr) 3028{ 3029 struct sctp_laddr *laddr; 3030 3031 /* go through the endpoint list */ 3032 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3033 /* be paranoid and validate the laddr */ 3034 if (laddr->ifa == NULL) { 3035 SCTPDBG(SCTP_DEBUG_ASCONF1, 3036 "check_addr_list_ep: laddr->ifa is NULL"); 3037 continue; 3038 } 3039 /* do i have it implicitly? */ 3040 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3041 continue; 3042 } 3043 /* check to see if in the init-ack */ 3044 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3045 /* try to add it */ 3046 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3047 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3048 } 3049 } 3050} 3051 3052/* 3053 * makes sure that the current kernel address list is consistent with the new 3054 * association (with all addrs bound) adds addresses as necessary 3055 */ 3056static void 3057sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3058 int length, struct sockaddr *init_addr, 3059 uint16_t local_scope, uint16_t site_scope, 3060 uint16_t ipv4_scope, uint16_t loopback_scope) 3061{ 3062 struct sctp_vrf *vrf = NULL; 3063 struct sctp_ifn *sctp_ifn; 3064 struct sctp_ifa *sctp_ifa; 3065 uint32_t vrf_id; 3066#ifdef INET 3067 struct sockaddr_in *sin; 3068#endif 3069#ifdef INET6 3070 struct sockaddr_in6 *sin6; 3071#endif 3072 3073 if (stcb) { 3074 vrf_id = stcb->asoc.vrf_id; 3075 } else { 3076 return; 3077 } 3078 SCTP_IPI_ADDR_RLOCK(); 3079 vrf = sctp_find_vrf(vrf_id); 3080 if (vrf == NULL) { 3081 SCTP_IPI_ADDR_RUNLOCK(); 3082 return; 3083 } 3084 /* go through all our known interfaces */ 3085 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3086 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3087 /* skip loopback interface */ 3088 continue; 3089 } 3090 /* go through each interface address */ 3091 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3092 /* do i have it implicitly? */ 3093 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3094 continue; 3095 } 3096 switch (sctp_ifa->address.sa.sa_family) { 3097#ifdef INET 3098 case AF_INET: 3099 sin = &sctp_ifa->address.sin; 3100 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3101 &sin->sin_addr) != 0) { 3102 continue; 3103 } 3104 if ((ipv4_scope == 0) && 3105 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3106 /* private address not in scope */ 3107 continue; 3108 } 3109 break; 3110#endif 3111#ifdef INET6 3112 case AF_INET6: 3113 sin6 = &sctp_ifa->address.sin6; 3114 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3115 &sin6->sin6_addr) != 0) { 3116 continue; 3117 } 3118 if ((local_scope == 0) && 3119 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3120 continue; 3121 } 3122 if ((site_scope == 0) && 3123 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3124 continue; 3125 } 3126 break; 3127#endif 3128 default: 3129 break; 3130 } 3131 /* check to see if in the init-ack */ 3132 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3133 /* try to add it */ 3134 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3135 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3136 SCTP_ADDR_LOCKED); 3137 } 3138 } /* end foreach ifa */ 3139 } /* end foreach ifn */ 3140 SCTP_IPI_ADDR_RUNLOCK(); 3141} 3142 3143/* 3144 * validates an init-ack chunk (from a cookie-echo) with current addresses 3145 * adds addresses from the init-ack into our local address list, if needed 3146 * queues asconf adds/deletes addresses as needed and makes appropriate list 3147 * changes for source address selection m, offset: points to the start of the 3148 * address list in an init-ack chunk length: total length of the address 3149 * params only init_addr: address where my INIT-ACK was sent from 3150 */ 3151void 3152sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3153 int length, struct sockaddr *init_addr, 3154 uint16_t local_scope, uint16_t site_scope, 3155 uint16_t ipv4_scope, uint16_t loopback_scope) 3156{ 3157 /* process the local addresses in the initack */ 3158 sctp_process_initack_addresses(stcb, m, offset, length); 3159 3160 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3161 /* bound all case */ 3162 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3163 local_scope, site_scope, ipv4_scope, loopback_scope); 3164 } else { 3165 /* subset bound case */ 3166 if (sctp_is_feature_on(stcb->sctp_ep, 3167 SCTP_PCB_FLAGS_DO_ASCONF)) { 3168 /* asconf's allowed */ 3169 sctp_check_address_list_ep(stcb, m, offset, length, 3170 init_addr); 3171 } 3172 /* else, no asconfs allowed, so what we sent is what we get */ 3173 } 3174} 3175 3176/* 3177 * sctp_bindx() support 3178 */ 3179uint32_t 3180sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3181 uint32_t type, uint32_t vrf_id) 3182{ 3183 struct sctp_ifa *ifa; 3184 struct sctp_laddr *laddr, *nladdr; 3185 3186 if (sa->sa_len == 0) { 3187 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3188 return (EINVAL); 3189 } 3190 if (type == SCTP_ADD_IP_ADDRESS) { 3191 /* For an add the address MUST be on the system */ 3192 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3193 } else if (type == SCTP_DEL_IP_ADDRESS) { 3194 /* For a delete we need to find it in the inp */ 3195 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3196 } else { 3197 ifa = NULL; 3198 } 3199 if (ifa != NULL) { 3200 if (type == SCTP_ADD_IP_ADDRESS) { 3201 sctp_add_local_addr_ep(inp, ifa, type); 3202 } else if (type == SCTP_DEL_IP_ADDRESS) { 3203 if (inp->laddr_count < 2) { 3204 /* can't delete the last local address */ 3205 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3206 return (EINVAL); 3207 } 3208 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3209 sctp_nxt_addr) { 3210 if (ifa == laddr->ifa) { 3211 /* Mark in the delete */ 3212 laddr->action = type; 3213 } 3214 } 3215 } 3216 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3217 /* 3218 * There is no need to start the iterator if the inp 3219 * has no associations. 3220 */ 3221 if (type == SCTP_DEL_IP_ADDRESS) { 3222 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3223 if (laddr->ifa == ifa) { 3224 sctp_del_local_addr_ep(inp, ifa); 3225 } 3226 } 3227 } 3228 } else { 3229 struct sctp_asconf_iterator *asc; 3230 struct sctp_laddr *wi; 3231 int ret; 3232 3233 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3234 sizeof(struct sctp_asconf_iterator), 3235 SCTP_M_ASC_IT); 3236 if (asc == NULL) { 3237 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3238 return (ENOMEM); 3239 } 3240 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3241 if (wi == NULL) { 3242 SCTP_FREE(asc, SCTP_M_ASC_IT); 3243 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3244 return (ENOMEM); 3245 } 3246 LIST_INIT(&asc->list_of_work); 3247 asc->cnt = 1; 3248 SCTP_INCR_LADDR_COUNT(); 3249 wi->ifa = ifa; 3250 wi->action = type; 3251 atomic_add_int(&ifa->refcount, 1); 3252 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3253 ret = sctp_initiate_iterator(sctp_asconf_iterator_ep, 3254 sctp_asconf_iterator_stcb, 3255 sctp_asconf_iterator_ep_end, 3256 SCTP_PCB_ANY_FLAGS, 3257 SCTP_PCB_ANY_FEATURES, 3258 SCTP_ASOC_ANY_STATE, 3259 (void *)asc, 0, 3260 sctp_asconf_iterator_end, inp, 0); 3261 if (ret) { 3262 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n"); 3263 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT); 3264 sctp_asconf_iterator_end(asc, 0); 3265 return (EFAULT); 3266 } 3267 } 3268 return (0); 3269 } else { 3270 /* invalid address! */ 3271 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3272 return (EADDRNOTAVAIL); 3273 } 3274} 3275 3276void 3277sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, struct sctp_nets *net) 3278{ 3279 struct sctp_asconf_addr *aa_vtag, *aa_add, *aa_del; 3280 struct sctp_ifa *sctp_ifap; 3281 struct sctp_asconf_tag_param *vtag; 3282#ifdef INET 3283 struct sockaddr_in *to; 3284#endif 3285#ifdef INET6 3286 struct sockaddr_in6 *to6; 3287#endif 3288 3289 if (net == NULL) { 3290 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3291 return; 3292 } 3293 if (stcb == NULL) { 3294 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3295 return; 3296 } 3297 /* 3298 * Need to have in the ASCONF: - VTAG(my_vtag/peer_vtag) - 3299 * ADD(wildcard) - DEL(wildcard) - ADD(Any global addresses) 3300 */ 3301 SCTP_MALLOC(aa_vtag, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); 3302 SCTP_MALLOC(aa_add, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); 3303 SCTP_MALLOC(aa_del, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); 3304 3305 if ((aa_vtag == NULL) || (aa_add == NULL) || (aa_del == NULL)) { 3306 /* Didn't get memory */ 3307 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3308out: 3309 if (aa_vtag != NULL) { 3310 SCTP_FREE(aa_vtag, SCTP_M_ASC_ADDR); 3311 } 3312 if (aa_add != NULL) { 3313 SCTP_FREE(aa_add, SCTP_M_ASC_ADDR); 3314 } 3315 if (aa_del != NULL) { 3316 SCTP_FREE(aa_del, SCTP_M_ASC_ADDR); 3317 } 3318 return; 3319 } 3320 memset(aa_vtag, 0, sizeof(struct sctp_asconf_addr)); 3321 aa_vtag->special_del = 0; 3322 /* Fill in ASCONF address parameter fields. */ 3323 /* Top level elements are "networked" during send. */ 3324 aa_vtag->ifa = NULL; 3325 aa_vtag->sent = 0; /* clear sent flag */ 3326 vtag = (struct sctp_asconf_tag_param *)&aa_vtag->ap.aph; 3327 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3328 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3329 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3330 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3331 3332 memset(aa_add, 0, sizeof(struct sctp_asconf_addr)); 3333 memset(aa_del, 0, sizeof(struct sctp_asconf_addr)); 3334 switch (net->ro._l_addr.sa.sa_family) { 3335#ifdef INET 3336 case AF_INET: 3337 aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3338 aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3339 aa_add->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3340 aa_add->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3341 /* No need to fill the address, we are using 0.0.0.0 */ 3342 aa_del->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3343 aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3344 aa_del->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3345 aa_del->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3346 /* No need to fill the address, we are using 0.0.0.0 */ 3347 break; 3348#endif 3349#ifdef INET6 3350 case AF_INET6: 3351 aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3352 aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3353 aa_add->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3354 aa_add->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3355 /* No need to fill the address, we are using ::0 */ 3356 aa_del->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3357 aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3358 aa_del->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3359 aa_del->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3360 /* No need to fill the address, we are using ::0 */ 3361 break; 3362#endif 3363 default: 3364 SCTPDBG(SCTP_DEBUG_ASCONF1, 3365 "sctp_asconf_send_nat_state_update: unknown address family %d\n", 3366 net->ro._l_addr.sa.sa_family); 3367 goto out; 3368 } 3369 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_vtag, next); 3370 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_add, next); 3371 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_del, next); 3372 3373 /* Now we must hunt the addresses and add all global addresses */ 3374 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3375 struct sctp_vrf *vrf = NULL; 3376 struct sctp_ifn *sctp_ifnp; 3377 uint32_t vrf_id; 3378 3379 vrf_id = stcb->sctp_ep->def_vrf_id; 3380 vrf = sctp_find_vrf(vrf_id); 3381 if (vrf == NULL) { 3382 goto skip_rest; 3383 } 3384 3385 SCTP_IPI_ADDR_RLOCK(); 3386 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3387 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3388 switch (sctp_ifap->address.sa.sa_family) { 3389#ifdef INET 3390 case AF_INET: 3391 to = &sctp_ifap->address.sin; 3392 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3393 &to->sin_addr) != 0) { 3394 continue; 3395 } 3396 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3397 continue; 3398 } 3399 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3400 continue; 3401 } 3402 break; 3403#endif 3404#ifdef INET6 3405 case AF_INET6: 3406 to6 = &sctp_ifap->address.sin6; 3407 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3408 &to6->sin6_addr) != 0) { 3409 continue; 3410 } 3411 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3412 continue; 3413 } 3414 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3415 continue; 3416 } 3417 break; 3418#endif 3419 default: 3420 continue; 3421 } 3422 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3423 } 3424 } 3425 SCTP_IPI_ADDR_RUNLOCK(); 3426 } else { 3427 struct sctp_laddr *laddr; 3428 3429 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3430 if (laddr->ifa == NULL) { 3431 continue; 3432 } 3433 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3434 /* 3435 * Address being deleted by the system, dont 3436 * list. 3437 */ 3438 continue; 3439 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3440 /* 3441 * Address being deleted on this ep don't 3442 * list. 3443 */ 3444 continue; 3445 } 3446 sctp_ifap = laddr->ifa; 3447 switch (sctp_ifap->address.sa.sa_family) { 3448#ifdef INET 3449 case AF_INET: 3450 to = &sctp_ifap->address.sin; 3451 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3452 continue; 3453 } 3454 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3455 continue; 3456 } 3457 break; 3458#endif 3459#ifdef INET6 3460 case AF_INET6: 3461 to6 = &sctp_ifap->address.sin6; 3462 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3463 continue; 3464 } 3465 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3466 continue; 3467 } 3468 break; 3469#endif 3470 default: 3471 continue; 3472 } 3473 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3474 } 3475 } 3476skip_rest: 3477 /* Now we must send the asconf into the queue */ 3478 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3479} 3480