1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <netinet/sctp_var.h> 38 #include <netinet/sctp_sysctl.h> 39 #include <netinet/sctp_pcb.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp_output.h> 43 #include <netinet/sctp_asconf.h> 44 #include <netinet/sctp_timer.h> 45 46 /* 47 * debug flags: 48 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 49 * SCTP_DEBUG_ASCONF2: detailed info 50 */ 51 52 53 /* 54 * RFC 5061 55 * 56 * An ASCONF parameter queue exists per asoc which holds the pending address 57 * operations. Lists are updated upon receipt of ASCONF-ACK. 58 * 59 * A restricted_addrs list exists per assoc to hold local addresses that are 60 * not (yet) usable by the assoc as a source address. These addresses are 61 * either pending an ASCONF operation (and exist on the ASCONF parameter 62 * queue), or they are permanently restricted (the peer has returned an 63 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 64 * 65 * Deleted addresses are always immediately removed from the lists as they will 66 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 67 * only if allowed. 68 */ 69 70 /* 71 * ASCONF parameter processing. 72 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 73 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 74 * FIX: allocating this many mbufs on the fly is pretty inefficient... 75 */ 76 static struct mbuf * 77 sctp_asconf_success_response(uint32_t id) 78 { 79 struct mbuf *m_reply = NULL; 80 struct sctp_asconf_paramhdr *aph; 81 82 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 83 0, M_NOWAIT, 1, MT_DATA); 84 if (m_reply == NULL) { 85 SCTPDBG(SCTP_DEBUG_ASCONF1, 86 "asconf_success_response: couldn't get mbuf!\n"); 87 return (NULL); 88 } 89 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 90 aph->correlation_id = id; 91 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 92 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 93 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 94 aph->ph.param_length = htons(aph->ph.param_length); 95 96 return (m_reply); 97 } 98 99 static struct mbuf * 100 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv, 101 uint16_t tlv_length) 102 { 103 struct mbuf *m_reply = NULL; 104 struct sctp_asconf_paramhdr *aph; 105 struct sctp_error_cause *error; 106 uint8_t *tlv; 107 108 m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) + 109 tlv_length + 110 sizeof(struct sctp_error_cause)), 111 0, M_NOWAIT, 1, MT_DATA); 112 if (m_reply == NULL) { 113 SCTPDBG(SCTP_DEBUG_ASCONF1, 114 "asconf_error_response: couldn't get mbuf!\n"); 115 return (NULL); 116 } 117 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 118 error = (struct sctp_error_cause *)(aph + 1); 119 120 aph->correlation_id = id; 121 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 122 error->code = htons(cause); 123 error->length = tlv_length + sizeof(struct sctp_error_cause); 124 aph->ph.param_length = error->length + 125 sizeof(struct sctp_asconf_paramhdr); 126 127 if (aph->ph.param_length > MLEN) { 128 SCTPDBG(SCTP_DEBUG_ASCONF1, 129 "asconf_error_response: tlv_length (%xh) too big\n", 130 tlv_length); 131 sctp_m_freem(m_reply); /* discard */ 132 return (NULL); 133 } 134 if (error_tlv != NULL) { 135 tlv = (uint8_t *) (error + 1); 136 memcpy(tlv, error_tlv, tlv_length); 137 } 138 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 139 error->length = htons(error->length); 140 aph->ph.param_length = htons(aph->ph.param_length); 141 142 return (m_reply); 143 } 144 145 static struct mbuf * 146 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, 147 struct sctp_tcb *stcb, int send_hb, int response_required) 148 { 149 struct sctp_nets *net; 150 struct mbuf *m_reply = NULL; 151 struct sockaddr_storage sa_store; 152 struct sctp_paramhdr *ph; 153 uint16_t param_type, param_length, aparam_length; 154 struct sockaddr *sa; 155 int zero_address = 0; 156 int bad_address = 0; 157 158 #ifdef INET 159 struct sockaddr_in *sin; 160 struct sctp_ipv4addr_param *v4addr; 161 162 #endif 163 #ifdef INET6 164 struct sockaddr_in6 *sin6; 165 struct sctp_ipv6addr_param *v6addr; 166 167 #endif 168 169 aparam_length = ntohs(aph->ph.param_length); 170 ph = (struct sctp_paramhdr *)(aph + 1); 171 param_type = ntohs(ph->param_type); 172 param_length = ntohs(ph->param_length); 173 174 sa = (struct sockaddr *)&sa_store; 175 switch (param_type) { 176 #ifdef INET 177 case SCTP_IPV4_ADDRESS: 178 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 179 /* invalid param size */ 180 return (NULL); 181 } 182 v4addr = (struct sctp_ipv4addr_param *)ph; 183 sin = (struct sockaddr_in *)&sa_store; 184 bzero(sin, sizeof(*sin)); 185 sin->sin_family = AF_INET; 186 sin->sin_len = sizeof(struct sockaddr_in); 187 sin->sin_port = stcb->rport; 188 sin->sin_addr.s_addr = v4addr->addr; 189 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 190 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 191 bad_address = 1; 192 } 193 if (sin->sin_addr.s_addr == INADDR_ANY) 194 zero_address = 1; 195 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 196 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 197 break; 198 #endif 199 #ifdef INET6 200 case SCTP_IPV6_ADDRESS: 201 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 202 /* invalid param size */ 203 return (NULL); 204 } 205 v6addr = (struct sctp_ipv6addr_param *)ph; 206 sin6 = (struct sockaddr_in6 *)&sa_store; 207 bzero(sin6, sizeof(*sin6)); 208 sin6->sin6_family = AF_INET6; 209 sin6->sin6_len = sizeof(struct sockaddr_in6); 210 sin6->sin6_port = stcb->rport; 211 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 212 sizeof(struct in6_addr)); 213 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 214 bad_address = 1; 215 } 216 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 217 zero_address = 1; 218 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 219 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 220 break; 221 #endif 222 default: 223 m_reply = sctp_asconf_error_response(aph->correlation_id, 224 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 225 aparam_length); 226 return (m_reply); 227 } /* end switch */ 228 229 /* if 0.0.0.0/::0, add the source address instead */ 230 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 231 sa = src; 232 SCTPDBG(SCTP_DEBUG_ASCONF1, 233 "process_asconf_add_ip: using source addr "); 234 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 235 } 236 /* add the address */ 237 if (bad_address) { 238 m_reply = sctp_asconf_error_response(aph->correlation_id, 239 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 240 aparam_length); 241 } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE, 242 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 243 SCTPDBG(SCTP_DEBUG_ASCONF1, 244 "process_asconf_add_ip: error adding address\n"); 245 m_reply = sctp_asconf_error_response(aph->correlation_id, 246 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph, 247 aparam_length); 248 } else { 249 /* notify upper layer */ 250 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 251 if (response_required) { 252 m_reply = 253 sctp_asconf_success_response(aph->correlation_id); 254 } 255 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 256 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 257 stcb, net); 258 if (send_hb) { 259 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 260 } 261 } 262 return (m_reply); 263 } 264 265 static int 266 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 267 { 268 struct sctp_nets *src_net, *net; 269 270 /* make sure the source address exists as a destination net */ 271 src_net = sctp_findnet(stcb, src); 272 if (src_net == NULL) { 273 /* not found */ 274 return (-1); 275 } 276 /* delete all destination addresses except the source */ 277 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 278 if (net != src_net) { 279 /* delete this address */ 280 sctp_remove_net(stcb, net); 281 SCTPDBG(SCTP_DEBUG_ASCONF1, 282 "asconf_del_remote_addrs_except: deleting "); 283 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 284 (struct sockaddr *)&net->ro._l_addr); 285 /* notify upper layer */ 286 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 287 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 288 } 289 } 290 return (0); 291 } 292 293 static struct mbuf * 294 sctp_process_asconf_delete_ip(struct sockaddr *src, 295 struct sctp_asconf_paramhdr *aph, 296 struct sctp_tcb *stcb, int response_required) 297 { 298 struct mbuf *m_reply = NULL; 299 struct sockaddr_storage sa_store; 300 struct sctp_paramhdr *ph; 301 uint16_t param_type, param_length, aparam_length; 302 struct sockaddr *sa; 303 int zero_address = 0; 304 int result; 305 306 #ifdef INET 307 struct sockaddr_in *sin; 308 struct sctp_ipv4addr_param *v4addr; 309 310 #endif 311 #ifdef INET6 312 struct sockaddr_in6 *sin6; 313 struct sctp_ipv6addr_param *v6addr; 314 315 #endif 316 317 aparam_length = ntohs(aph->ph.param_length); 318 ph = (struct sctp_paramhdr *)(aph + 1); 319 param_type = ntohs(ph->param_type); 320 param_length = ntohs(ph->param_length); 321 322 sa = (struct sockaddr *)&sa_store; 323 switch (param_type) { 324 #ifdef INET 325 case SCTP_IPV4_ADDRESS: 326 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 327 /* invalid param size */ 328 return (NULL); 329 } 330 v4addr = (struct sctp_ipv4addr_param *)ph; 331 sin = (struct sockaddr_in *)&sa_store; 332 bzero(sin, sizeof(*sin)); 333 sin->sin_family = AF_INET; 334 sin->sin_len = sizeof(struct sockaddr_in); 335 sin->sin_port = stcb->rport; 336 sin->sin_addr.s_addr = v4addr->addr; 337 if (sin->sin_addr.s_addr == INADDR_ANY) 338 zero_address = 1; 339 SCTPDBG(SCTP_DEBUG_ASCONF1, 340 "process_asconf_delete_ip: deleting "); 341 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 342 break; 343 #endif 344 #ifdef INET6 345 case SCTP_IPV6_ADDRESS: 346 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 347 /* invalid param size */ 348 return (NULL); 349 } 350 v6addr = (struct sctp_ipv6addr_param *)ph; 351 sin6 = (struct sockaddr_in6 *)&sa_store; 352 bzero(sin6, sizeof(*sin6)); 353 sin6->sin6_family = AF_INET6; 354 sin6->sin6_len = sizeof(struct sockaddr_in6); 355 sin6->sin6_port = stcb->rport; 356 memcpy(&sin6->sin6_addr, v6addr->addr, 357 sizeof(struct in6_addr)); 358 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 359 zero_address = 1; 360 SCTPDBG(SCTP_DEBUG_ASCONF1, 361 "process_asconf_delete_ip: deleting "); 362 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 363 break; 364 #endif 365 default: 366 m_reply = sctp_asconf_error_response(aph->correlation_id, 367 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 368 aparam_length); 369 return (m_reply); 370 } 371 372 /* make sure the source address is not being deleted */ 373 if (sctp_cmpaddr(sa, src)) { 374 /* trying to delete the source address! */ 375 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 376 m_reply = sctp_asconf_error_response(aph->correlation_id, 377 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, 378 aparam_length); 379 return (m_reply); 380 } 381 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 382 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 383 result = sctp_asconf_del_remote_addrs_except(stcb, src); 384 385 if (result) { 386 /* src address did not exist? */ 387 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 388 /* what error to reply with?? */ 389 m_reply = 390 sctp_asconf_error_response(aph->correlation_id, 391 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, 392 aparam_length); 393 } else if (response_required) { 394 m_reply = 395 sctp_asconf_success_response(aph->correlation_id); 396 } 397 return (m_reply); 398 } 399 /* delete the address */ 400 result = sctp_del_remote_addr(stcb, sa); 401 /* 402 * note if result == -2, the address doesn't exist in the asoc but 403 * since it's being deleted anyways, we just ack the delete -- but 404 * this probably means something has already gone awry 405 */ 406 if (result == -1) { 407 /* only one address in the asoc */ 408 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 409 m_reply = sctp_asconf_error_response(aph->correlation_id, 410 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, 411 aparam_length); 412 } else { 413 if (response_required) { 414 m_reply = sctp_asconf_success_response(aph->correlation_id); 415 } 416 /* notify upper layer */ 417 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 418 } 419 return (m_reply); 420 } 421 422 static struct mbuf * 423 sctp_process_asconf_set_primary(struct sockaddr *src, 424 struct sctp_asconf_paramhdr *aph, 425 struct sctp_tcb *stcb, int response_required) 426 { 427 struct mbuf *m_reply = NULL; 428 struct sockaddr_storage sa_store; 429 struct sctp_paramhdr *ph; 430 uint16_t param_type, param_length, aparam_length; 431 struct sockaddr *sa; 432 int zero_address = 0; 433 434 #ifdef INET 435 struct sockaddr_in *sin; 436 struct sctp_ipv4addr_param *v4addr; 437 438 #endif 439 #ifdef INET6 440 struct sockaddr_in6 *sin6; 441 struct sctp_ipv6addr_param *v6addr; 442 443 #endif 444 445 aparam_length = ntohs(aph->ph.param_length); 446 ph = (struct sctp_paramhdr *)(aph + 1); 447 param_type = ntohs(ph->param_type); 448 param_length = ntohs(ph->param_length); 449 450 sa = (struct sockaddr *)&sa_store; 451 switch (param_type) { 452 #ifdef INET 453 case SCTP_IPV4_ADDRESS: 454 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 455 /* invalid param size */ 456 return (NULL); 457 } 458 v4addr = (struct sctp_ipv4addr_param *)ph; 459 sin = (struct sockaddr_in *)&sa_store; 460 bzero(sin, sizeof(*sin)); 461 sin->sin_family = AF_INET; 462 sin->sin_len = sizeof(struct sockaddr_in); 463 sin->sin_addr.s_addr = v4addr->addr; 464 if (sin->sin_addr.s_addr == INADDR_ANY) 465 zero_address = 1; 466 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 467 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 468 break; 469 #endif 470 #ifdef INET6 471 case SCTP_IPV6_ADDRESS: 472 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 473 /* invalid param size */ 474 return (NULL); 475 } 476 v6addr = (struct sctp_ipv6addr_param *)ph; 477 sin6 = (struct sockaddr_in6 *)&sa_store; 478 bzero(sin6, sizeof(*sin6)); 479 sin6->sin6_family = AF_INET6; 480 sin6->sin6_len = sizeof(struct sockaddr_in6); 481 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 482 sizeof(struct in6_addr)); 483 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 484 zero_address = 1; 485 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 486 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 487 break; 488 #endif 489 default: 490 m_reply = sctp_asconf_error_response(aph->correlation_id, 491 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 492 aparam_length); 493 return (m_reply); 494 } 495 496 /* if 0.0.0.0/::0, use the source address instead */ 497 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 498 sa = src; 499 SCTPDBG(SCTP_DEBUG_ASCONF1, 500 "process_asconf_set_primary: using source addr "); 501 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 502 } 503 /* set the primary address */ 504 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 505 SCTPDBG(SCTP_DEBUG_ASCONF1, 506 "process_asconf_set_primary: primary address set\n"); 507 /* notify upper layer */ 508 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 509 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 510 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 511 (stcb->asoc.alternate)) { 512 sctp_free_remote_addr(stcb->asoc.alternate); 513 stcb->asoc.alternate = NULL; 514 } 515 if (response_required) { 516 m_reply = sctp_asconf_success_response(aph->correlation_id); 517 } 518 /* 519 * Mobility adaptation. Ideally, when the reception of SET 520 * PRIMARY with DELETE IP ADDRESS of the previous primary 521 * destination, unacknowledged DATA are retransmitted 522 * immediately to the new primary destination for seamless 523 * handover. If the destination is UNCONFIRMED and marked to 524 * REQ_PRIM, The retransmission occur when reception of the 525 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 526 * sctp_input.c) Also, when change of the primary 527 * destination, it is better that all subsequent new DATA 528 * containing already queued DATA are transmitted to the new 529 * primary destination. (by micchie) 530 */ 531 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 532 SCTP_MOBILITY_BASE) || 533 sctp_is_mobility_feature_on(stcb->sctp_ep, 534 SCTP_MOBILITY_FASTHANDOFF)) && 535 sctp_is_mobility_feature_on(stcb->sctp_ep, 536 SCTP_MOBILITY_PRIM_DELETED) && 537 (stcb->asoc.primary_destination->dest_state & 538 SCTP_ADDR_UNCONFIRMED) == 0) { 539 540 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7); 541 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 542 SCTP_MOBILITY_FASTHANDOFF)) { 543 sctp_assoc_immediate_retrans(stcb, 544 stcb->asoc.primary_destination); 545 } 546 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 547 SCTP_MOBILITY_BASE)) { 548 sctp_move_chunks_from_net(stcb, 549 stcb->asoc.deleted_primary); 550 } 551 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 552 stcb->asoc.deleted_primary); 553 } 554 } else { 555 /* couldn't set the requested primary address! */ 556 SCTPDBG(SCTP_DEBUG_ASCONF1, 557 "process_asconf_set_primary: set primary failed!\n"); 558 /* must have been an invalid address, so report */ 559 m_reply = sctp_asconf_error_response(aph->correlation_id, 560 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 561 aparam_length); 562 } 563 564 return (m_reply); 565 } 566 567 /* 568 * handles an ASCONF chunk. 569 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 570 */ 571 void 572 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 573 struct sockaddr *src, 574 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 575 int first) 576 { 577 struct sctp_association *asoc; 578 uint32_t serial_num; 579 struct mbuf *n, *m_ack, *m_result, *m_tail; 580 struct sctp_asconf_ack_chunk *ack_cp; 581 struct sctp_asconf_paramhdr *aph, *ack_aph; 582 struct sctp_ipv6addr_param *p_addr; 583 unsigned int asconf_limit, cnt; 584 int error = 0; /* did an error occur? */ 585 586 /* asconf param buffer */ 587 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 588 struct sctp_asconf_ack *ack, *ack_next; 589 590 /* verify minimum length */ 591 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 592 SCTPDBG(SCTP_DEBUG_ASCONF1, 593 "handle_asconf: chunk too small = %xh\n", 594 ntohs(cp->ch.chunk_length)); 595 return; 596 } 597 asoc = &stcb->asoc; 598 serial_num = ntohl(cp->serial_number); 599 600 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 601 /* got a duplicate ASCONF */ 602 SCTPDBG(SCTP_DEBUG_ASCONF1, 603 "handle_asconf: got duplicate serial number = %xh\n", 604 serial_num); 605 return; 606 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 607 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 608 serial_num, asoc->asconf_seq_in + 1); 609 return; 610 } 611 /* it's the expected "next" sequence number, so process it */ 612 asoc->asconf_seq_in = serial_num; /* update sequence */ 613 /* get length of all the param's in the ASCONF */ 614 asconf_limit = offset + ntohs(cp->ch.chunk_length); 615 SCTPDBG(SCTP_DEBUG_ASCONF1, 616 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 617 asconf_limit, serial_num); 618 619 if (first) { 620 /* delete old cache */ 621 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 622 623 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 624 if (ack->serial_number == serial_num) 625 break; 626 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 627 ack->serial_number, serial_num); 628 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 629 if (ack->data != NULL) { 630 sctp_m_freem(ack->data); 631 } 632 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 633 } 634 } 635 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 636 M_NOWAIT, 1, MT_DATA); 637 if (m_ack == NULL) { 638 SCTPDBG(SCTP_DEBUG_ASCONF1, 639 "handle_asconf: couldn't get mbuf!\n"); 640 return; 641 } 642 m_tail = m_ack; /* current reply chain's tail */ 643 644 /* fill in ASCONF-ACK header */ 645 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 646 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 647 ack_cp->ch.chunk_flags = 0; 648 ack_cp->serial_number = htonl(serial_num); 649 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 650 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 651 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 652 653 /* skip the lookup address parameter */ 654 offset += sizeof(struct sctp_asconf_chunk); 655 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 656 if (p_addr == NULL) { 657 SCTPDBG(SCTP_DEBUG_ASCONF1, 658 "handle_asconf: couldn't get lookup addr!\n"); 659 /* respond with a missing/invalid mandatory parameter error */ 660 return; 661 } 662 /* param_length is already validated in process_control... */ 663 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 664 665 /* get pointer to first asconf param in ASCONF-ACK */ 666 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk)); 667 if (ack_aph == NULL) { 668 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n"); 669 return; 670 } 671 /* get pointer to first asconf param in ASCONF */ 672 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 673 if (aph == NULL) { 674 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 675 goto send_reply; 676 } 677 /* process through all parameters */ 678 cnt = 0; 679 while (aph != NULL) { 680 unsigned int param_length, param_type; 681 682 param_type = ntohs(aph->ph.param_type); 683 param_length = ntohs(aph->ph.param_length); 684 if (offset + param_length > asconf_limit) { 685 /* parameter goes beyond end of chunk! */ 686 sctp_m_freem(m_ack); 687 return; 688 } 689 m_result = NULL; 690 691 if (param_length > sizeof(aparam_buf)) { 692 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 693 sctp_m_freem(m_ack); 694 return; 695 } 696 if (param_length <= sizeof(struct sctp_paramhdr)) { 697 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 698 sctp_m_freem(m_ack); 699 } 700 /* get the entire parameter */ 701 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 702 if (aph == NULL) { 703 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 704 sctp_m_freem(m_ack); 705 return; 706 } 707 switch (param_type) { 708 case SCTP_ADD_IP_ADDRESS: 709 asoc->peer_supports_asconf = 1; 710 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 711 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 712 cnt++; 713 break; 714 case SCTP_DEL_IP_ADDRESS: 715 asoc->peer_supports_asconf = 1; 716 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 717 error); 718 break; 719 case SCTP_ERROR_CAUSE_IND: 720 /* not valid in an ASCONF chunk */ 721 break; 722 case SCTP_SET_PRIM_ADDR: 723 asoc->peer_supports_asconf = 1; 724 m_result = sctp_process_asconf_set_primary(src, aph, 725 stcb, error); 726 break; 727 case SCTP_NAT_VTAGS: 728 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 729 break; 730 case SCTP_SUCCESS_REPORT: 731 /* not valid in an ASCONF chunk */ 732 break; 733 case SCTP_ULP_ADAPTATION: 734 /* FIX */ 735 break; 736 default: 737 if ((param_type & 0x8000) == 0) { 738 /* Been told to STOP at this param */ 739 asconf_limit = offset; 740 /* 741 * FIX FIX - We need to call 742 * sctp_arethere_unrecognized_parameters() 743 * to get a operr and send it for any 744 * param's with the 0x4000 bit set OR do it 745 * here ourselves... note we still must STOP 746 * if the 0x8000 bit is clear. 747 */ 748 } 749 /* unknown/invalid param type */ 750 break; 751 } /* switch */ 752 753 /* add any (error) result to the reply mbuf chain */ 754 if (m_result != NULL) { 755 SCTP_BUF_NEXT(m_tail) = m_result; 756 m_tail = m_result; 757 /* update lengths, make sure it's aligned too */ 758 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 759 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 760 /* set flag to force success reports */ 761 error = 1; 762 } 763 offset += SCTP_SIZE32(param_length); 764 /* update remaining ASCONF message length to process */ 765 if (offset >= asconf_limit) { 766 /* no more data in the mbuf chain */ 767 break; 768 } 769 /* get pointer to next asconf param */ 770 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 771 sizeof(struct sctp_asconf_paramhdr), 772 (uint8_t *) & aparam_buf); 773 if (aph == NULL) { 774 /* can't get an asconf paramhdr */ 775 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 776 /* FIX ME - add error here... */ 777 } 778 } 779 780 send_reply: 781 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 782 /* save the ASCONF-ACK reply */ 783 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 784 struct sctp_asconf_ack); 785 if (ack == NULL) { 786 sctp_m_freem(m_ack); 787 return; 788 } 789 ack->serial_number = serial_num; 790 ack->last_sent_to = NULL; 791 ack->data = m_ack; 792 ack->len = 0; 793 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 794 ack->len += SCTP_BUF_LEN(n); 795 } 796 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 797 798 /* see if last_control_chunk_from is set properly (use IP src addr) */ 799 if (stcb->asoc.last_control_chunk_from == NULL) { 800 /* 801 * this could happen if the source address was just newly 802 * added 803 */ 804 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 805 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 806 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 807 /* look up the from address */ 808 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 809 #ifdef SCTP_DEBUG 810 if (stcb->asoc.last_control_chunk_from == NULL) { 811 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 812 } 813 #endif 814 } 815 } 816 817 /* 818 * does the address match? returns 0 if not, 1 if so 819 */ 820 static uint32_t 821 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 822 { 823 switch (sa->sa_family) { 824 #ifdef INET6 825 case AF_INET6: 826 { 827 /* XXX scopeid */ 828 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 829 830 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 831 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 832 sizeof(struct in6_addr)) == 0)) { 833 return (1); 834 } 835 break; 836 } 837 #endif 838 #ifdef INET 839 case AF_INET: 840 { 841 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 842 843 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 844 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 845 sizeof(struct in_addr)) == 0)) { 846 return (1); 847 } 848 break; 849 } 850 #endif 851 default: 852 break; 853 } 854 return (0); 855 } 856 857 /* 858 * does the address match? returns 0 if not, 1 if so 859 */ 860 static uint32_t 861 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 862 { 863 uint16_t param_type, param_length; 864 865 param_type = ntohs(ph->param_type); 866 param_length = ntohs(ph->param_length); 867 switch (sa->sa_family) { 868 #ifdef INET6 869 case AF_INET6: 870 { 871 /* XXX scopeid */ 872 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 873 struct sctp_ipv6addr_param *v6addr; 874 875 v6addr = (struct sctp_ipv6addr_param *)ph; 876 if ((param_type == SCTP_IPV6_ADDRESS) && 877 param_length == sizeof(struct sctp_ipv6addr_param) && 878 (memcmp(&v6addr->addr, &sin6->sin6_addr, 879 sizeof(struct in6_addr)) == 0)) { 880 return (1); 881 } 882 break; 883 } 884 #endif 885 #ifdef INET 886 case AF_INET: 887 { 888 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 889 struct sctp_ipv4addr_param *v4addr; 890 891 v4addr = (struct sctp_ipv4addr_param *)ph; 892 if ((param_type == SCTP_IPV4_ADDRESS) && 893 param_length == sizeof(struct sctp_ipv4addr_param) && 894 (memcmp(&v4addr->addr, &sin->sin_addr, 895 sizeof(struct in_addr)) == 0)) { 896 return (1); 897 } 898 break; 899 } 900 #endif 901 default: 902 break; 903 } 904 return (0); 905 } 906 907 /* 908 * Cleanup for non-responded/OP ERR'd ASCONF 909 */ 910 void 911 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 912 { 913 /* mark peer as ASCONF incapable */ 914 stcb->asoc.peer_supports_asconf = 0; 915 /* 916 * clear out any existing asconfs going out 917 */ 918 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 919 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 920 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 921 /* remove the old ASCONF on our outbound queue */ 922 sctp_toss_old_asconf(stcb); 923 } 924 925 /* 926 * cleanup any cached source addresses that may be topologically 927 * incorrect after a new address has been added to this interface. 928 */ 929 static void 930 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 931 { 932 struct sctp_nets *net; 933 934 /* 935 * Ideally, we want to only clear cached routes and source addresses 936 * that are topologically incorrect. But since there is no easy way 937 * to know whether the newly added address on the ifn would cause a 938 * routing change (i.e. a new egress interface would be chosen) 939 * without doing a new routing lookup and source address selection, 940 * we will (for now) just flush any cached route using a different 941 * ifn (and cached source addrs) and let output re-choose them 942 * during the next send on that net. 943 */ 944 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 945 /* 946 * clear any cached route (and cached source address) if the 947 * route's interface is NOT the same as the address change. 948 * If it's the same interface, just clear the cached source 949 * address. 950 */ 951 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 952 ((ifn == NULL) || 953 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 954 /* clear any cached route */ 955 RTFREE(net->ro.ro_rt); 956 net->ro.ro_rt = NULL; 957 } 958 /* clear any cached source address */ 959 if (net->src_addr_selected) { 960 sctp_free_ifa(net->ro._s_addr); 961 net->ro._s_addr = NULL; 962 net->src_addr_selected = 0; 963 } 964 } 965 } 966 967 968 void 969 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 970 { 971 int error; 972 973 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 974 return; 975 } 976 if (stcb->asoc.deleted_primary == NULL) { 977 return; 978 } 979 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 980 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 981 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 982 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 983 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 984 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 985 stcb->asoc.deleted_primary, 986 SCTP_FROM_SCTP_TIMER + SCTP_LOC_8); 987 stcb->asoc.num_send_timers_up--; 988 if (stcb->asoc.num_send_timers_up < 0) { 989 stcb->asoc.num_send_timers_up = 0; 990 } 991 SCTP_TCB_LOCK_ASSERT(stcb); 992 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 993 stcb->asoc.deleted_primary); 994 if (error) { 995 SCTP_INP_DECR_REF(stcb->sctp_ep); 996 return; 997 } 998 SCTP_TCB_LOCK_ASSERT(stcb); 999 #ifdef SCTP_AUDITING_ENABLED 1000 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1001 #endif 1002 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1003 if ((stcb->asoc.num_send_timers_up == 0) && 1004 (stcb->asoc.sent_queue_cnt > 0)) { 1005 struct sctp_tmit_chunk *chk; 1006 1007 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1008 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1009 stcb, chk->whoTo); 1010 } 1011 } 1012 return; 1013 } 1014 1015 static int 1016 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1017 1018 void 1019 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1020 { 1021 struct sctp_tmit_chunk *chk; 1022 1023 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1024 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1025 SCTP_FROM_SCTP_TIMER + SCTP_LOC_5); 1026 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1027 net->error_count = 0; 1028 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1029 if (chk->whoTo == net) { 1030 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1031 chk->sent = SCTP_DATAGRAM_RESEND; 1032 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1033 sctp_flight_size_decrease(chk); 1034 sctp_total_flight_decrease(stcb, chk); 1035 net->marked_retrans++; 1036 stcb->asoc.marked_retrans++; 1037 } 1038 } 1039 } 1040 if (net->marked_retrans) { 1041 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1042 } 1043 } 1044 1045 static void 1046 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1047 { 1048 struct sctp_nets *net; 1049 int addrnum, changed; 1050 1051 /* 1052 * If number of local valid addresses is 1, the valid address is 1053 * probably newly added address. Several valid addresses in this 1054 * association. A source address may not be changed. Additionally, 1055 * they can be configured on a same interface as "alias" addresses. 1056 * (by micchie) 1057 */ 1058 addrnum = sctp_local_addr_count(stcb); 1059 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1060 addrnum); 1061 if (addrnum == 1) { 1062 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1063 /* clear any cached route and source address */ 1064 if (net->ro.ro_rt) { 1065 RTFREE(net->ro.ro_rt); 1066 net->ro.ro_rt = NULL; 1067 } 1068 if (net->src_addr_selected) { 1069 sctp_free_ifa(net->ro._s_addr); 1070 net->ro._s_addr = NULL; 1071 net->src_addr_selected = 0; 1072 } 1073 /* Retransmit unacknowledged DATA chunks immediately */ 1074 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1075 SCTP_MOBILITY_FASTHANDOFF)) { 1076 sctp_net_immediate_retrans(stcb, net); 1077 } 1078 /* also, SET PRIMARY is maybe already sent */ 1079 } 1080 return; 1081 } 1082 /* Multiple local addresses exsist in the association. */ 1083 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1084 /* clear any cached route and source address */ 1085 if (net->ro.ro_rt) { 1086 RTFREE(net->ro.ro_rt); 1087 net->ro.ro_rt = NULL; 1088 } 1089 if (net->src_addr_selected) { 1090 sctp_free_ifa(net->ro._s_addr); 1091 net->ro._s_addr = NULL; 1092 net->src_addr_selected = 0; 1093 } 1094 /* 1095 * Check if the nexthop is corresponding to the new address. 1096 * If the new address is corresponding to the current 1097 * nexthop, the path will be changed. If the new address is 1098 * NOT corresponding to the current nexthop, the path will 1099 * not be changed. 1100 */ 1101 SCTP_RTALLOC((sctp_route_t *) & net->ro, 1102 stcb->sctp_ep->def_vrf_id); 1103 if (net->ro.ro_rt == NULL) 1104 continue; 1105 1106 changed = 0; 1107 switch (net->ro._l_addr.sa.sa_family) { 1108 #ifdef INET 1109 case AF_INET: 1110 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) { 1111 changed = 1; 1112 } 1113 break; 1114 #endif 1115 #ifdef INET6 1116 case AF_INET6: 1117 if (sctp_v6src_match_nexthop( 1118 &newifa->address.sin6, (sctp_route_t *) & net->ro)) { 1119 changed = 1; 1120 } 1121 break; 1122 #endif 1123 default: 1124 break; 1125 } 1126 /* 1127 * if the newly added address does not relate routing 1128 * information, we skip. 1129 */ 1130 if (changed == 0) 1131 continue; 1132 /* Retransmit unacknowledged DATA chunks immediately */ 1133 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1134 SCTP_MOBILITY_FASTHANDOFF)) { 1135 sctp_net_immediate_retrans(stcb, net); 1136 } 1137 /* Send SET PRIMARY for this new address */ 1138 if (net == stcb->asoc.primary_destination) { 1139 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1140 SCTP_SET_PRIM_ADDR); 1141 } 1142 } 1143 } 1144 1145 /* 1146 * process an ADD/DELETE IP ack from peer. 1147 * addr: corresponding sctp_ifa to the address being added/deleted. 1148 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1149 * flag: 1=success, 0=failure. 1150 */ 1151 static void 1152 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1153 { 1154 /* 1155 * do the necessary asoc list work- if we get a failure indication, 1156 * leave the address on the assoc's restricted list. If we get a 1157 * success indication, remove the address from the restricted list. 1158 */ 1159 /* 1160 * Note: this will only occur for ADD_IP_ADDRESS, since 1161 * DEL_IP_ADDRESS is never actually added to the list... 1162 */ 1163 if (flag) { 1164 /* success case, so remove from the restricted list */ 1165 sctp_del_local_addr_restricted(stcb, addr); 1166 1167 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1168 SCTP_MOBILITY_BASE) || 1169 sctp_is_mobility_feature_on(stcb->sctp_ep, 1170 SCTP_MOBILITY_FASTHANDOFF)) { 1171 sctp_path_check_and_react(stcb, addr); 1172 return; 1173 } 1174 /* clear any cached/topologically incorrect source addresses */ 1175 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1176 } 1177 /* else, leave it on the list */ 1178 } 1179 1180 /* 1181 * add an asconf add/delete/set primary IP address parameter to the queue. 1182 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1183 * returns 0 if queued, -1 if not queued/removed. 1184 * NOTE: if adding, but a delete for the same address is already scheduled 1185 * (and not yet sent out), simply remove it from queue. Same for deleting 1186 * an address already scheduled for add. If a duplicate operation is found, 1187 * ignore the new one. 1188 */ 1189 static int 1190 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1191 uint16_t type) 1192 { 1193 struct sctp_asconf_addr *aa, *aa_next; 1194 1195 /* make sure the request isn't already in the queue */ 1196 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1197 /* address match? */ 1198 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1199 continue; 1200 /* 1201 * is the request already in queue but not sent? pass the 1202 * request already sent in order to resolve the following 1203 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1204 * can't remove the ADD request already sent 3. arrival of 1205 * ADD 1206 */ 1207 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1208 return (-1); 1209 } 1210 /* is the negative request already in queue, and not sent */ 1211 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1212 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1213 /* add requested, delete already queued */ 1214 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1215 /* remove the ifa from the restricted list */ 1216 sctp_del_local_addr_restricted(stcb, ifa); 1217 /* free the asconf param */ 1218 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1219 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1220 return (-1); 1221 } 1222 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1223 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1224 /* delete requested, add already queued */ 1225 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1226 /* remove the aa->ifa from the restricted list */ 1227 sctp_del_local_addr_restricted(stcb, aa->ifa); 1228 /* free the asconf param */ 1229 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1230 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1231 return (-1); 1232 } 1233 } /* for each aa */ 1234 1235 /* adding new request to the queue */ 1236 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1237 SCTP_M_ASC_ADDR); 1238 if (aa == NULL) { 1239 /* didn't get memory */ 1240 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1241 return (-1); 1242 } 1243 aa->special_del = 0; 1244 /* fill in asconf address parameter fields */ 1245 /* top level elements are "networked" during send */ 1246 aa->ap.aph.ph.param_type = type; 1247 aa->ifa = ifa; 1248 atomic_add_int(&ifa->refcount, 1); 1249 /* correlation_id filled in during send routine later... */ 1250 switch (ifa->address.sa.sa_family) { 1251 #ifdef INET6 1252 case AF_INET6: 1253 { 1254 struct sockaddr_in6 *sin6; 1255 1256 sin6 = (struct sockaddr_in6 *)&ifa->address.sa; 1257 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1258 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1259 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1260 sizeof(struct sctp_ipv6addr_param); 1261 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1262 sizeof(struct in6_addr)); 1263 break; 1264 } 1265 #endif 1266 #ifdef INET 1267 case AF_INET: 1268 { 1269 struct sockaddr_in *sin; 1270 1271 sin = (struct sockaddr_in *)&ifa->address.sa; 1272 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1273 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1274 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1275 sizeof(struct sctp_ipv4addr_param); 1276 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1277 sizeof(struct in_addr)); 1278 break; 1279 } 1280 #endif 1281 default: 1282 /* invalid family! */ 1283 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1284 sctp_free_ifa(ifa); 1285 return (-1); 1286 } 1287 aa->sent = 0; /* clear sent flag */ 1288 1289 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1290 #ifdef SCTP_DEBUG 1291 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1292 if (type == SCTP_ADD_IP_ADDRESS) { 1293 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1294 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1295 } else if (type == SCTP_DEL_IP_ADDRESS) { 1296 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1297 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1298 } else { 1299 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1300 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1301 } 1302 } 1303 #endif 1304 1305 return (0); 1306 } 1307 1308 1309 /* 1310 * add an asconf operation for the given ifa and type. 1311 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1312 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1313 * advisable. 1314 */ 1315 static int 1316 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1317 uint16_t type) 1318 { 1319 uint32_t status; 1320 int pending_delete_queued = 0; 1321 1322 /* see if peer supports ASCONF */ 1323 if (stcb->asoc.peer_supports_asconf == 0) { 1324 return (-1); 1325 } 1326 /* 1327 * if this is deleting the last address from the assoc, mark it as 1328 * pending. 1329 */ 1330 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending && 1331 (sctp_local_addr_count(stcb) < 2)) { 1332 /* set the pending delete info only */ 1333 stcb->asoc.asconf_del_pending = 1; 1334 stcb->asoc.asconf_addr_del_pending = ifa; 1335 atomic_add_int(&ifa->refcount, 1); 1336 SCTPDBG(SCTP_DEBUG_ASCONF2, 1337 "asconf_queue_add: mark delete last address pending\n"); 1338 return (-1); 1339 } 1340 /* queue an asconf parameter */ 1341 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1342 1343 /* 1344 * if this is an add, and there is a delete also pending (i.e. the 1345 * last local address is being changed), queue the pending delete 1346 * too. 1347 */ 1348 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1349 /* queue in the pending delete */ 1350 if (sctp_asconf_queue_mgmt(stcb, 1351 stcb->asoc.asconf_addr_del_pending, 1352 SCTP_DEL_IP_ADDRESS) == 0) { 1353 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1354 pending_delete_queued = 1; 1355 /* clear out the pending delete info */ 1356 stcb->asoc.asconf_del_pending = 0; 1357 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1358 stcb->asoc.asconf_addr_del_pending = NULL; 1359 } 1360 } 1361 if (pending_delete_queued) { 1362 struct sctp_nets *net; 1363 1364 /* 1365 * since we know that the only/last address is now being 1366 * changed in this case, reset the cwnd/rto on all nets to 1367 * start as a new address and path. Also clear the error 1368 * counts to give the assoc the best chance to complete the 1369 * address change. 1370 */ 1371 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1372 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1373 net); 1374 net->RTO = 0; 1375 net->error_count = 0; 1376 } 1377 stcb->asoc.overall_error_count = 0; 1378 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1379 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1380 stcb->asoc.overall_error_count, 1381 0, 1382 SCTP_FROM_SCTP_ASCONF, 1383 __LINE__); 1384 } 1385 /* queue in an advisory set primary too */ 1386 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1387 /* let caller know we should send this out immediately */ 1388 status = 1; 1389 } 1390 return (status); 1391 } 1392 1393 /*- 1394 * add an asconf delete IP address parameter to the queue by sockaddr and 1395 * possibly with no sctp_ifa available. This is only called by the routine 1396 * that checks the addresses in an INIT-ACK against the current address list. 1397 * returns 0 if completed, non-zero if not completed. 1398 * NOTE: if an add is already scheduled (and not yet sent out), simply 1399 * remove it from queue. If a duplicate operation is found, ignore the 1400 * new one. 1401 */ 1402 static int 1403 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1404 { 1405 struct sctp_ifa *ifa; 1406 struct sctp_asconf_addr *aa, *aa_next; 1407 uint32_t vrf_id; 1408 1409 if (stcb == NULL) { 1410 return (-1); 1411 } 1412 /* see if peer supports ASCONF */ 1413 if (stcb->asoc.peer_supports_asconf == 0) { 1414 return (-1); 1415 } 1416 /* make sure the request isn't already in the queue */ 1417 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1418 /* address match? */ 1419 if (sctp_asconf_addr_match(aa, sa) == 0) 1420 continue; 1421 /* is the request already in queue (sent or not) */ 1422 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1423 return (-1); 1424 } 1425 /* is the negative request already in queue, and not sent */ 1426 if (aa->sent == 1) 1427 continue; 1428 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1429 /* add already queued, so remove existing entry */ 1430 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1431 sctp_del_local_addr_restricted(stcb, aa->ifa); 1432 /* free the entry */ 1433 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1434 return (-1); 1435 } 1436 } /* for each aa */ 1437 1438 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1439 if (stcb) { 1440 vrf_id = stcb->asoc.vrf_id; 1441 } else { 1442 vrf_id = SCTP_DEFAULT_VRFID; 1443 } 1444 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 1445 1446 /* adding new request to the queue */ 1447 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1448 SCTP_M_ASC_ADDR); 1449 if (aa == NULL) { 1450 /* didn't get memory */ 1451 SCTPDBG(SCTP_DEBUG_ASCONF1, 1452 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1453 return (-1); 1454 } 1455 aa->special_del = 0; 1456 /* fill in asconf address parameter fields */ 1457 /* top level elements are "networked" during send */ 1458 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1459 aa->ifa = ifa; 1460 if (ifa) 1461 atomic_add_int(&ifa->refcount, 1); 1462 /* correlation_id filled in during send routine later... */ 1463 switch (sa->sa_family) { 1464 #ifdef INET6 1465 case AF_INET6: 1466 { 1467 /* IPv6 address */ 1468 struct sockaddr_in6 *sin6; 1469 1470 sin6 = (struct sockaddr_in6 *)sa; 1471 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1472 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1473 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1474 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1475 sizeof(struct in6_addr)); 1476 break; 1477 } 1478 #endif 1479 #ifdef INET 1480 case AF_INET: 1481 { 1482 /* IPv4 address */ 1483 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1484 1485 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1486 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1487 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1488 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1489 sizeof(struct in_addr)); 1490 break; 1491 } 1492 #endif 1493 default: 1494 /* invalid family! */ 1495 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1496 if (ifa) 1497 sctp_free_ifa(ifa); 1498 return (-1); 1499 } 1500 aa->sent = 0; /* clear sent flag */ 1501 1502 /* delete goes to the back of the queue */ 1503 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1504 1505 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1506 return (0); 1507 } 1508 1509 /* 1510 * find a specific asconf param on our "sent" queue 1511 */ 1512 static struct sctp_asconf_addr * 1513 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1514 { 1515 struct sctp_asconf_addr *aa; 1516 1517 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1518 if (aa->ap.aph.correlation_id == correlation_id && 1519 aa->sent == 1) { 1520 /* found it */ 1521 return (aa); 1522 } 1523 } 1524 /* didn't find it */ 1525 return (NULL); 1526 } 1527 1528 /* 1529 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1530 * notifications based on the error response 1531 */ 1532 static void 1533 sctp_asconf_process_error(struct sctp_tcb *stcb, 1534 struct sctp_asconf_paramhdr *aph) 1535 { 1536 struct sctp_error_cause *eh; 1537 struct sctp_paramhdr *ph; 1538 uint16_t param_type; 1539 uint16_t error_code; 1540 1541 eh = (struct sctp_error_cause *)(aph + 1); 1542 ph = (struct sctp_paramhdr *)(eh + 1); 1543 /* validate lengths */ 1544 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1545 htons(aph->ph.param_length)) { 1546 /* invalid error cause length */ 1547 SCTPDBG(SCTP_DEBUG_ASCONF1, 1548 "asconf_process_error: cause element too long\n"); 1549 return; 1550 } 1551 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1552 htons(eh->length)) { 1553 /* invalid included TLV length */ 1554 SCTPDBG(SCTP_DEBUG_ASCONF1, 1555 "asconf_process_error: included TLV too long\n"); 1556 return; 1557 } 1558 /* which error code ? */ 1559 error_code = ntohs(eh->code); 1560 param_type = ntohs(aph->ph.param_type); 1561 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1562 switch (error_code) { 1563 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1564 /* we allow ourselves to "try again" for this error */ 1565 break; 1566 default: 1567 /* peer can't handle it... */ 1568 switch (param_type) { 1569 case SCTP_ADD_IP_ADDRESS: 1570 case SCTP_DEL_IP_ADDRESS: 1571 stcb->asoc.peer_supports_asconf = 0; 1572 break; 1573 case SCTP_SET_PRIM_ADDR: 1574 stcb->asoc.peer_supports_asconf = 0; 1575 break; 1576 default: 1577 break; 1578 } 1579 } 1580 } 1581 1582 /* 1583 * process an asconf queue param. 1584 * aparam: parameter to process, will be removed from the queue. 1585 * flag: 1=success case, 0=failure case 1586 */ 1587 static void 1588 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1589 struct sctp_asconf_addr *aparam, uint32_t flag) 1590 { 1591 uint16_t param_type; 1592 1593 /* process this param */ 1594 param_type = aparam->ap.aph.ph.param_type; 1595 switch (param_type) { 1596 case SCTP_ADD_IP_ADDRESS: 1597 SCTPDBG(SCTP_DEBUG_ASCONF1, 1598 "process_param_ack: added IP address\n"); 1599 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1600 break; 1601 case SCTP_DEL_IP_ADDRESS: 1602 SCTPDBG(SCTP_DEBUG_ASCONF1, 1603 "process_param_ack: deleted IP address\n"); 1604 /* nothing really to do... lists already updated */ 1605 break; 1606 case SCTP_SET_PRIM_ADDR: 1607 SCTPDBG(SCTP_DEBUG_ASCONF1, 1608 "process_param_ack: set primary IP address\n"); 1609 /* nothing to do... peer may start using this addr */ 1610 if (flag == 0) 1611 stcb->asoc.peer_supports_asconf = 0; 1612 break; 1613 default: 1614 /* should NEVER happen */ 1615 break; 1616 } 1617 1618 /* remove the param and free it */ 1619 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1620 if (aparam->ifa) 1621 sctp_free_ifa(aparam->ifa); 1622 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1623 } 1624 1625 /* 1626 * cleanup from a bad asconf ack parameter 1627 */ 1628 static void 1629 sctp_asconf_ack_clear(struct sctp_tcb *stcb) 1630 { 1631 /* assume peer doesn't really know how to do asconfs */ 1632 stcb->asoc.peer_supports_asconf = 0; 1633 /* XXX we could free the pending queue here */ 1634 } 1635 1636 void 1637 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1638 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1639 struct sctp_nets *net, int *abort_no_unlock) 1640 { 1641 struct sctp_association *asoc; 1642 uint32_t serial_num; 1643 uint16_t ack_length; 1644 struct sctp_asconf_paramhdr *aph; 1645 struct sctp_asconf_addr *aa, *aa_next; 1646 uint32_t last_error_id = 0; /* last error correlation id */ 1647 uint32_t id; 1648 struct sctp_asconf_addr *ap; 1649 1650 /* asconf param buffer */ 1651 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1652 1653 /* verify minimum length */ 1654 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1655 SCTPDBG(SCTP_DEBUG_ASCONF1, 1656 "handle_asconf_ack: chunk too small = %xh\n", 1657 ntohs(cp->ch.chunk_length)); 1658 return; 1659 } 1660 asoc = &stcb->asoc; 1661 serial_num = ntohl(cp->serial_number); 1662 1663 /* 1664 * NOTE: we may want to handle this differently- currently, we will 1665 * abort when we get an ack for the expected serial number + 1 (eg. 1666 * we didn't send it), process an ack normally if it is the expected 1667 * serial number, and re-send the previous ack for *ALL* other 1668 * serial numbers 1669 */ 1670 1671 /* 1672 * if the serial number is the next expected, but I didn't send it, 1673 * abort the asoc, since someone probably just hijacked us... 1674 */ 1675 if (serial_num == (asoc->asconf_seq_out + 1)) { 1676 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1677 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED); 1678 *abort_no_unlock = 1; 1679 return; 1680 } 1681 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1682 /* got a duplicate/unexpected ASCONF-ACK */ 1683 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1684 serial_num, asoc->asconf_seq_out_acked + 1); 1685 return; 1686 } 1687 if (serial_num == asoc->asconf_seq_out - 1) { 1688 /* stop our timer */ 1689 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1690 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1691 } 1692 /* process the ASCONF-ACK contents */ 1693 ack_length = ntohs(cp->ch.chunk_length) - 1694 sizeof(struct sctp_asconf_ack_chunk); 1695 offset += sizeof(struct sctp_asconf_ack_chunk); 1696 /* process through all parameters */ 1697 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1698 unsigned int param_length, param_type; 1699 1700 /* get pointer to next asconf parameter */ 1701 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1702 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1703 if (aph == NULL) { 1704 /* can't get an asconf paramhdr */ 1705 sctp_asconf_ack_clear(stcb); 1706 return; 1707 } 1708 param_type = ntohs(aph->ph.param_type); 1709 param_length = ntohs(aph->ph.param_length); 1710 if (param_length > ack_length) { 1711 sctp_asconf_ack_clear(stcb); 1712 return; 1713 } 1714 if (param_length < sizeof(struct sctp_paramhdr)) { 1715 sctp_asconf_ack_clear(stcb); 1716 return; 1717 } 1718 /* get the complete parameter... */ 1719 if (param_length > sizeof(aparam_buf)) { 1720 SCTPDBG(SCTP_DEBUG_ASCONF1, 1721 "param length (%u) larger than buffer size!\n", param_length); 1722 sctp_asconf_ack_clear(stcb); 1723 return; 1724 } 1725 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1726 if (aph == NULL) { 1727 sctp_asconf_ack_clear(stcb); 1728 return; 1729 } 1730 /* correlation_id is transparent to peer, no ntohl needed */ 1731 id = aph->correlation_id; 1732 1733 switch (param_type) { 1734 case SCTP_ERROR_CAUSE_IND: 1735 last_error_id = id; 1736 /* find the corresponding asconf param in our queue */ 1737 ap = sctp_asconf_find_param(stcb, id); 1738 if (ap == NULL) { 1739 /* hmm... can't find this in our queue! */ 1740 break; 1741 } 1742 /* process the parameter, failed flag */ 1743 sctp_asconf_process_param_ack(stcb, ap, 0); 1744 /* process the error response */ 1745 sctp_asconf_process_error(stcb, aph); 1746 break; 1747 case SCTP_SUCCESS_REPORT: 1748 /* find the corresponding asconf param in our queue */ 1749 ap = sctp_asconf_find_param(stcb, id); 1750 if (ap == NULL) { 1751 /* hmm... can't find this in our queue! */ 1752 break; 1753 } 1754 /* process the parameter, success flag */ 1755 sctp_asconf_process_param_ack(stcb, ap, 1); 1756 break; 1757 default: 1758 break; 1759 } /* switch */ 1760 1761 /* update remaining ASCONF-ACK message length to process */ 1762 ack_length -= SCTP_SIZE32(param_length); 1763 if (ack_length <= 0) { 1764 /* no more data in the mbuf chain */ 1765 break; 1766 } 1767 offset += SCTP_SIZE32(param_length); 1768 } /* while */ 1769 1770 /* 1771 * if there are any "sent" params still on the queue, these are 1772 * implicitly "success", or "failed" (if we got an error back) ... 1773 * so process these appropriately 1774 * 1775 * we assume that the correlation_id's are monotonically increasing 1776 * beginning from 1 and that we don't have *that* many outstanding 1777 * at any given time 1778 */ 1779 if (last_error_id == 0) 1780 last_error_id--;/* set to "max" value */ 1781 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1782 if (aa->sent == 1) { 1783 /* 1784 * implicitly successful or failed if correlation_id 1785 * < last_error_id, then success else, failure 1786 */ 1787 if (aa->ap.aph.correlation_id < last_error_id) 1788 sctp_asconf_process_param_ack(stcb, aa, 1); 1789 else 1790 sctp_asconf_process_param_ack(stcb, aa, 0); 1791 } else { 1792 /* 1793 * since we always process in order (FIFO queue) if 1794 * we reach one that hasn't been sent, the rest 1795 * should not have been sent either. so, we're 1796 * done... 1797 */ 1798 break; 1799 } 1800 } 1801 1802 /* update the next sequence number to use */ 1803 asoc->asconf_seq_out_acked++; 1804 /* remove the old ASCONF on our outbound queue */ 1805 sctp_toss_old_asconf(stcb); 1806 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1807 #ifdef SCTP_TIMER_BASED_ASCONF 1808 /* we have more params, so restart our timer */ 1809 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1810 stcb, net); 1811 #else 1812 /* we have more params, so send out more */ 1813 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1814 #endif 1815 } 1816 } 1817 1818 #ifdef INET6 1819 static uint32_t 1820 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1821 { 1822 struct sockaddr_in6 *sin6, *net6; 1823 struct sctp_nets *net; 1824 1825 if (sa->sa_family != AF_INET6) { 1826 /* wrong family */ 1827 return (0); 1828 } 1829 sin6 = (struct sockaddr_in6 *)sa; 1830 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1831 /* not link local address */ 1832 return (0); 1833 } 1834 /* hunt through our destination nets list for this scope_id */ 1835 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1836 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1837 AF_INET6) 1838 continue; 1839 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1840 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1841 continue; 1842 if (sctp_is_same_scope(sin6, net6)) { 1843 /* found one */ 1844 return (1); 1845 } 1846 } 1847 /* didn't find one */ 1848 return (0); 1849 } 1850 1851 #endif 1852 1853 /* 1854 * address management functions 1855 */ 1856 static void 1857 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1858 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1859 { 1860 int status; 1861 1862 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1863 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1864 /* subset bound, no ASCONF allowed case, so ignore */ 1865 return; 1866 } 1867 /* 1868 * note: we know this is not the subset bound, no ASCONF case eg. 1869 * this is boundall or subset bound w/ASCONF allowed 1870 */ 1871 1872 /* first, make sure it's a good address family */ 1873 switch (ifa->address.sa.sa_family) { 1874 #ifdef INET6 1875 case AF_INET6: 1876 break; 1877 #endif 1878 #ifdef INET 1879 case AF_INET: 1880 break; 1881 #endif 1882 default: 1883 return; 1884 } 1885 #ifdef INET6 1886 /* make sure we're "allowed" to add this type of addr */ 1887 if (ifa->address.sa.sa_family == AF_INET6) { 1888 /* invalid if we're not a v6 endpoint */ 1889 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1890 return; 1891 /* is the v6 addr really valid ? */ 1892 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1893 return; 1894 } 1895 } 1896 #endif 1897 /* put this address on the "pending/do not use yet" list */ 1898 sctp_add_local_addr_restricted(stcb, ifa); 1899 /* 1900 * check address scope if address is out of scope, don't queue 1901 * anything... note: this would leave the address on both inp and 1902 * asoc lists 1903 */ 1904 switch (ifa->address.sa.sa_family) { 1905 #ifdef INET6 1906 case AF_INET6: 1907 { 1908 struct sockaddr_in6 *sin6; 1909 1910 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 1911 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1912 /* we skip unspecifed addresses */ 1913 return; 1914 } 1915 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1916 if (stcb->asoc.scope.local_scope == 0) { 1917 return; 1918 } 1919 /* is it the right link local scope? */ 1920 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1921 return; 1922 } 1923 } 1924 if (stcb->asoc.scope.site_scope == 0 && 1925 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1926 return; 1927 } 1928 break; 1929 } 1930 #endif 1931 #ifdef INET 1932 case AF_INET: 1933 { 1934 struct sockaddr_in *sin; 1935 struct in6pcb *inp6; 1936 1937 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1938 /* invalid if we are a v6 only endpoint */ 1939 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1940 SCTP_IPV6_V6ONLY(inp6)) 1941 return; 1942 1943 sin = (struct sockaddr_in *)&ifa->address.sa; 1944 if (sin->sin_addr.s_addr == 0) { 1945 /* we skip unspecifed addresses */ 1946 return; 1947 } 1948 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1949 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1950 return; 1951 } 1952 break; 1953 } 1954 #endif 1955 default: 1956 /* else, not AF_INET or AF_INET6, so skip */ 1957 return; 1958 } 1959 1960 /* queue an asconf for this address add/delete */ 1961 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1962 /* does the peer do asconf? */ 1963 if (stcb->asoc.peer_supports_asconf) { 1964 /* queue an asconf for this addr */ 1965 status = sctp_asconf_queue_add(stcb, ifa, type); 1966 1967 /* 1968 * if queued ok, and in the open state, send out the 1969 * ASCONF. If in the non-open state, these will be 1970 * sent when the state goes open. 1971 */ 1972 if (status == 0 && 1973 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1974 #ifdef SCTP_TIMER_BASED_ASCONF 1975 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1976 stcb, stcb->asoc.primary_destination); 1977 #else 1978 sctp_send_asconf(stcb, NULL, addr_locked); 1979 #endif 1980 } 1981 } 1982 } 1983 } 1984 1985 1986 int 1987 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 1988 { 1989 struct sctp_asconf_iterator *asc; 1990 struct sctp_ifa *ifa; 1991 struct sctp_laddr *l; 1992 int cnt_invalid = 0; 1993 1994 asc = (struct sctp_asconf_iterator *)ptr; 1995 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 1996 ifa = l->ifa; 1997 switch (ifa->address.sa.sa_family) { 1998 #ifdef INET6 1999 case AF_INET6: 2000 /* invalid if we're not a v6 endpoint */ 2001 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2002 cnt_invalid++; 2003 if (asc->cnt == cnt_invalid) 2004 return (1); 2005 } 2006 break; 2007 #endif 2008 #ifdef INET 2009 case AF_INET: 2010 { 2011 /* invalid if we are a v6 only endpoint */ 2012 struct in6pcb *inp6; 2013 2014 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2015 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2016 SCTP_IPV6_V6ONLY(inp6)) { 2017 cnt_invalid++; 2018 if (asc->cnt == cnt_invalid) 2019 return (1); 2020 } 2021 break; 2022 } 2023 #endif 2024 default: 2025 /* invalid address family */ 2026 cnt_invalid++; 2027 if (asc->cnt == cnt_invalid) 2028 return (1); 2029 } 2030 } 2031 return (0); 2032 } 2033 2034 static int 2035 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2036 { 2037 struct sctp_ifa *ifa; 2038 struct sctp_asconf_iterator *asc; 2039 struct sctp_laddr *laddr, *nladdr, *l; 2040 2041 /* Only for specific case not bound all */ 2042 asc = (struct sctp_asconf_iterator *)ptr; 2043 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2044 ifa = l->ifa; 2045 if (l->action == SCTP_ADD_IP_ADDRESS) { 2046 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2047 sctp_nxt_addr) { 2048 if (laddr->ifa == ifa) { 2049 laddr->action = 0; 2050 break; 2051 } 2052 } 2053 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2054 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2055 /* remove only after all guys are done */ 2056 if (laddr->ifa == ifa) { 2057 sctp_del_local_addr_ep(inp, ifa); 2058 } 2059 } 2060 } 2061 } 2062 return (0); 2063 } 2064 2065 void 2066 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2067 void *ptr, uint32_t val SCTP_UNUSED) 2068 { 2069 struct sctp_asconf_iterator *asc; 2070 struct sctp_ifa *ifa; 2071 struct sctp_laddr *l; 2072 int cnt_invalid = 0; 2073 int type, status; 2074 int num_queued = 0; 2075 2076 asc = (struct sctp_asconf_iterator *)ptr; 2077 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2078 ifa = l->ifa; 2079 type = l->action; 2080 2081 /* address's vrf_id must be the vrf_id of the assoc */ 2082 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2083 continue; 2084 } 2085 /* Same checks again for assoc */ 2086 switch (ifa->address.sa.sa_family) { 2087 #ifdef INET6 2088 case AF_INET6: 2089 { 2090 /* invalid if we're not a v6 endpoint */ 2091 struct sockaddr_in6 *sin6; 2092 2093 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2094 cnt_invalid++; 2095 if (asc->cnt == cnt_invalid) 2096 return; 2097 else 2098 continue; 2099 } 2100 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 2101 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2102 /* we skip unspecifed addresses */ 2103 continue; 2104 } 2105 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2106 if (stcb->asoc.scope.local_scope == 0) { 2107 continue; 2108 } 2109 /* is it the right link local scope? */ 2110 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2111 continue; 2112 } 2113 } 2114 break; 2115 } 2116 #endif 2117 #ifdef INET 2118 case AF_INET: 2119 { 2120 /* invalid if we are a v6 only endpoint */ 2121 struct in6pcb *inp6; 2122 struct sockaddr_in *sin; 2123 2124 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2125 /* invalid if we are a v6 only endpoint */ 2126 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2127 SCTP_IPV6_V6ONLY(inp6)) 2128 continue; 2129 2130 sin = (struct sockaddr_in *)&ifa->address.sa; 2131 if (sin->sin_addr.s_addr == 0) { 2132 /* we skip unspecifed addresses */ 2133 continue; 2134 } 2135 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2136 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2137 continue; 2138 } 2139 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2140 SCTP_IPV6_V6ONLY(inp6)) { 2141 cnt_invalid++; 2142 if (asc->cnt == cnt_invalid) 2143 return; 2144 else 2145 continue; 2146 } 2147 break; 2148 } 2149 #endif 2150 default: 2151 /* invalid address family */ 2152 cnt_invalid++; 2153 if (asc->cnt == cnt_invalid) 2154 return; 2155 else 2156 continue; 2157 break; 2158 } 2159 2160 if (type == SCTP_ADD_IP_ADDRESS) { 2161 /* prevent this address from being used as a source */ 2162 sctp_add_local_addr_restricted(stcb, ifa); 2163 } else if (type == SCTP_DEL_IP_ADDRESS) { 2164 struct sctp_nets *net; 2165 2166 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2167 sctp_rtentry_t *rt; 2168 2169 /* delete this address if cached */ 2170 if (net->ro._s_addr == ifa) { 2171 sctp_free_ifa(net->ro._s_addr); 2172 net->ro._s_addr = NULL; 2173 net->src_addr_selected = 0; 2174 rt = net->ro.ro_rt; 2175 if (rt) { 2176 RTFREE(rt); 2177 net->ro.ro_rt = NULL; 2178 } 2179 /* 2180 * Now we deleted our src address, 2181 * should we not also now reset the 2182 * cwnd/rto to start as if its a new 2183 * address? 2184 */ 2185 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2186 net->RTO = 0; 2187 2188 } 2189 } 2190 } else if (type == SCTP_SET_PRIM_ADDR) { 2191 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2192 /* must validate the ifa is in the ep */ 2193 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2194 continue; 2195 } 2196 } else { 2197 /* Need to check scopes for this guy */ 2198 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2199 continue; 2200 } 2201 } 2202 } 2203 /* queue an asconf for this address add/delete */ 2204 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2205 stcb->asoc.peer_supports_asconf) { 2206 /* queue an asconf for this addr */ 2207 status = sctp_asconf_queue_add(stcb, ifa, type); 2208 /* 2209 * if queued ok, and in the open state, update the 2210 * count of queued params. If in the non-open 2211 * state, these get sent when the assoc goes open. 2212 */ 2213 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2214 if (status >= 0) { 2215 num_queued++; 2216 } 2217 } 2218 } 2219 } 2220 /* 2221 * If we have queued params in the open state, send out an ASCONF. 2222 */ 2223 if (num_queued > 0) { 2224 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2225 } 2226 } 2227 2228 void 2229 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2230 { 2231 struct sctp_asconf_iterator *asc; 2232 struct sctp_ifa *ifa; 2233 struct sctp_laddr *l, *nl; 2234 2235 asc = (struct sctp_asconf_iterator *)ptr; 2236 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2237 ifa = l->ifa; 2238 if (l->action == SCTP_ADD_IP_ADDRESS) { 2239 /* Clear the defer use flag */ 2240 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2241 } 2242 sctp_free_ifa(ifa); 2243 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2244 SCTP_DECR_LADDR_COUNT(); 2245 } 2246 SCTP_FREE(asc, SCTP_M_ASC_IT); 2247 } 2248 2249 /* 2250 * sa is the sockaddr to ask the peer to set primary to. 2251 * returns: 0 = completed, -1 = error 2252 */ 2253 int32_t 2254 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2255 { 2256 uint32_t vrf_id; 2257 struct sctp_ifa *ifa; 2258 2259 /* find the ifa for the desired set primary */ 2260 vrf_id = stcb->asoc.vrf_id; 2261 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2262 if (ifa == NULL) { 2263 /* Invalid address */ 2264 return (-1); 2265 } 2266 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2267 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2268 /* set primary queuing succeeded */ 2269 SCTPDBG(SCTP_DEBUG_ASCONF1, 2270 "set_primary_ip_address_sa: queued on tcb=%p, ", 2271 (void *)stcb); 2272 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2273 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2274 #ifdef SCTP_TIMER_BASED_ASCONF 2275 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2276 stcb->sctp_ep, stcb, 2277 stcb->asoc.primary_destination); 2278 #else 2279 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2280 #endif 2281 } 2282 } else { 2283 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2284 (void *)stcb); 2285 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2286 return (-1); 2287 } 2288 return (0); 2289 } 2290 2291 void 2292 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2293 { 2294 struct sctp_inpcb *inp; 2295 2296 /* go through all our PCB's */ 2297 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2298 struct sctp_tcb *stcb; 2299 2300 /* process for all associations for this endpoint */ 2301 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2302 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2303 if (!sctp_asconf_queue_add(stcb, ifa, 2304 SCTP_SET_PRIM_ADDR)) { 2305 /* set primary queuing succeeded */ 2306 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2307 (void *)stcb); 2308 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2309 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2310 #ifdef SCTP_TIMER_BASED_ASCONF 2311 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2312 stcb->sctp_ep, stcb, 2313 stcb->asoc.primary_destination); 2314 #else 2315 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2316 #endif 2317 } 2318 } 2319 } /* for each stcb */ 2320 } /* for each inp */ 2321 } 2322 2323 int 2324 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2325 { 2326 struct sctp_tmit_chunk *chk, *nchk; 2327 unsigned int offset, asconf_limit; 2328 struct sctp_asconf_chunk *acp; 2329 struct sctp_asconf_paramhdr *aph; 2330 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2331 struct sctp_paramhdr *ph; 2332 int add_cnt, del_cnt; 2333 uint16_t last_param_type; 2334 2335 add_cnt = del_cnt = 0; 2336 last_param_type = 0; 2337 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2338 if (chk->data == NULL) { 2339 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2340 continue; 2341 } 2342 offset = 0; 2343 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2344 offset += sizeof(struct sctp_asconf_chunk); 2345 asconf_limit = ntohs(acp->ch.chunk_length); 2346 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2347 if (ph == NULL) { 2348 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2349 continue; 2350 } 2351 offset += ntohs(ph->param_length); 2352 2353 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2354 if (aph == NULL) { 2355 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2356 continue; 2357 } 2358 while (aph != NULL) { 2359 unsigned int param_length, param_type; 2360 2361 param_type = ntohs(aph->ph.param_type); 2362 param_length = ntohs(aph->ph.param_length); 2363 if (offset + param_length > asconf_limit) { 2364 /* parameter goes beyond end of chunk! */ 2365 break; 2366 } 2367 if (param_length > sizeof(aparam_buf)) { 2368 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2369 break; 2370 } 2371 if (param_length <= sizeof(struct sctp_paramhdr)) { 2372 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2373 break; 2374 } 2375 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2376 if (aph == NULL) { 2377 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2378 break; 2379 } 2380 ph = (struct sctp_paramhdr *)(aph + 1); 2381 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2382 switch (param_type) { 2383 case SCTP_ADD_IP_ADDRESS: 2384 add_cnt++; 2385 break; 2386 case SCTP_DEL_IP_ADDRESS: 2387 del_cnt++; 2388 break; 2389 default: 2390 break; 2391 } 2392 last_param_type = param_type; 2393 } 2394 offset += SCTP_SIZE32(param_length); 2395 if (offset >= asconf_limit) { 2396 /* no more data in the mbuf chain */ 2397 break; 2398 } 2399 /* get pointer to next asconf param */ 2400 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2401 } 2402 } 2403 2404 /* 2405 * we want to find the sequences which consist of ADD -> DEL -> ADD 2406 * or DEL -> ADD 2407 */ 2408 if (add_cnt > del_cnt || 2409 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2410 return (1); 2411 } 2412 return (0); 2413 } 2414 2415 static struct sockaddr * 2416 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2417 { 2418 struct sctp_vrf *vrf = NULL; 2419 struct sctp_ifn *sctp_ifn; 2420 struct sctp_ifa *sctp_ifa; 2421 2422 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2423 SCTP_IPI_ADDR_RLOCK(); 2424 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2425 if (vrf == NULL) { 2426 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2427 SCTP_IPI_ADDR_RUNLOCK(); 2428 return (NULL); 2429 } 2430 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2431 if (stcb->asoc.scope.loopback_scope == 0 && 2432 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2433 /* Skip if loopback_scope not set */ 2434 continue; 2435 } 2436 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2437 switch (sctp_ifa->address.sa.sa_family) { 2438 #ifdef INET 2439 case AF_INET: 2440 if (stcb->asoc.scope.ipv4_addr_legal) { 2441 struct sockaddr_in *sin; 2442 2443 sin = (struct sockaddr_in *)&sctp_ifa->address.sa; 2444 if (sin->sin_addr.s_addr == 0) { 2445 /* skip unspecifed addresses */ 2446 continue; 2447 } 2448 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2449 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2450 continue; 2451 2452 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2453 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2454 continue; 2455 /* 2456 * found a valid local v4 address to 2457 * use 2458 */ 2459 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2460 SCTP_IPI_ADDR_RUNLOCK(); 2461 return (&sctp_ifa->address.sa); 2462 } 2463 break; 2464 #endif 2465 #ifdef INET6 2466 case AF_INET6: 2467 if (stcb->asoc.scope.ipv6_addr_legal) { 2468 struct sockaddr_in6 *sin6; 2469 2470 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2471 continue; 2472 } 2473 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa; 2474 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2475 /* 2476 * we skip unspecifed 2477 * addresses 2478 */ 2479 continue; 2480 } 2481 if (stcb->asoc.scope.local_scope == 0 && 2482 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2483 continue; 2484 if (stcb->asoc.scope.site_scope == 0 && 2485 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2486 continue; 2487 2488 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2489 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2490 continue; 2491 /* 2492 * found a valid local v6 address to 2493 * use 2494 */ 2495 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2496 SCTP_IPI_ADDR_RUNLOCK(); 2497 return (&sctp_ifa->address.sa); 2498 } 2499 break; 2500 #endif 2501 default: 2502 break; 2503 } 2504 } 2505 } 2506 /* no valid addresses found */ 2507 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2508 SCTP_IPI_ADDR_RUNLOCK(); 2509 return (NULL); 2510 } 2511 2512 static struct sockaddr * 2513 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2514 { 2515 struct sctp_laddr *laddr; 2516 2517 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2518 if (laddr->ifa == NULL) { 2519 continue; 2520 } 2521 /* is the address restricted ? */ 2522 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2523 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2524 continue; 2525 2526 /* found a valid local address to use */ 2527 return (&laddr->ifa->address.sa); 2528 } 2529 /* no valid addresses found */ 2530 return (NULL); 2531 } 2532 2533 /* 2534 * builds an ASCONF chunk from queued ASCONF params. 2535 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2536 */ 2537 struct mbuf * 2538 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2539 { 2540 struct mbuf *m_asconf, *m_asconf_chk; 2541 struct sctp_asconf_addr *aa; 2542 struct sctp_asconf_chunk *acp; 2543 struct sctp_asconf_paramhdr *aph; 2544 struct sctp_asconf_addr_param *aap; 2545 uint32_t p_length; 2546 uint32_t correlation_id = 1; /* 0 is reserved... */ 2547 caddr_t ptr, lookup_ptr; 2548 uint8_t lookup_used = 0; 2549 2550 /* are there any asconf params to send? */ 2551 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2552 if (aa->sent == 0) 2553 break; 2554 } 2555 if (aa == NULL) 2556 return (NULL); 2557 2558 /* 2559 * get a chunk header mbuf and a cluster for the asconf params since 2560 * it's simpler to fill in the asconf chunk header lookup address on 2561 * the fly 2562 */ 2563 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2564 if (m_asconf_chk == NULL) { 2565 /* no mbuf's */ 2566 SCTPDBG(SCTP_DEBUG_ASCONF1, 2567 "compose_asconf: couldn't get chunk mbuf!\n"); 2568 return (NULL); 2569 } 2570 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2571 if (m_asconf == NULL) { 2572 /* no mbuf's */ 2573 SCTPDBG(SCTP_DEBUG_ASCONF1, 2574 "compose_asconf: couldn't get mbuf!\n"); 2575 sctp_m_freem(m_asconf_chk); 2576 return (NULL); 2577 } 2578 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2579 SCTP_BUF_LEN(m_asconf) = 0; 2580 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2581 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2582 /* save pointers to lookup address and asconf params */ 2583 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2584 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2585 2586 /* fill in chunk header info */ 2587 acp->ch.chunk_type = SCTP_ASCONF; 2588 acp->ch.chunk_flags = 0; 2589 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2590 stcb->asoc.asconf_seq_out++; 2591 2592 /* add parameters... up to smallest MTU allowed */ 2593 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2594 if (aa->sent) 2595 continue; 2596 /* get the parameter length */ 2597 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2598 /* will it fit in current chunk? */ 2599 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) { 2600 /* won't fit, so we're done with this chunk */ 2601 break; 2602 } 2603 /* assign (and store) a correlation id */ 2604 aa->ap.aph.correlation_id = correlation_id++; 2605 2606 /* 2607 * fill in address if we're doing a delete this is a simple 2608 * way for us to fill in the correlation address, which 2609 * should only be used by the peer if we're deleting our 2610 * source address and adding a new address (e.g. renumbering 2611 * case) 2612 */ 2613 if (lookup_used == 0 && 2614 (aa->special_del == 0) && 2615 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2616 struct sctp_ipv6addr_param *lookup; 2617 uint16_t p_size, addr_size; 2618 2619 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2620 lookup->ph.param_type = 2621 htons(aa->ap.addrp.ph.param_type); 2622 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2623 /* copy IPv6 address */ 2624 p_size = sizeof(struct sctp_ipv6addr_param); 2625 addr_size = sizeof(struct in6_addr); 2626 } else { 2627 /* copy IPv4 address */ 2628 p_size = sizeof(struct sctp_ipv4addr_param); 2629 addr_size = sizeof(struct in_addr); 2630 } 2631 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2632 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2633 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2634 lookup_used = 1; 2635 } 2636 /* copy into current space */ 2637 memcpy(ptr, &aa->ap, p_length); 2638 2639 /* network elements and update lengths */ 2640 aph = (struct sctp_asconf_paramhdr *)ptr; 2641 aap = (struct sctp_asconf_addr_param *)ptr; 2642 /* correlation_id is transparent to peer, no htonl needed */ 2643 aph->ph.param_type = htons(aph->ph.param_type); 2644 aph->ph.param_length = htons(aph->ph.param_length); 2645 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2646 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2647 2648 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2649 ptr += SCTP_SIZE32(p_length); 2650 2651 /* 2652 * these params are removed off the pending list upon 2653 * getting an ASCONF-ACK back from the peer, just set flag 2654 */ 2655 aa->sent = 1; 2656 } 2657 /* check to see if the lookup addr has been populated yet */ 2658 if (lookup_used == 0) { 2659 /* NOTE: if the address param is optional, can skip this... */ 2660 /* add any valid (existing) address... */ 2661 struct sctp_ipv6addr_param *lookup; 2662 uint16_t p_size, addr_size; 2663 struct sockaddr *found_addr; 2664 caddr_t addr_ptr; 2665 2666 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2667 found_addr = sctp_find_valid_localaddr(stcb, 2668 addr_locked); 2669 else 2670 found_addr = sctp_find_valid_localaddr_ep(stcb); 2671 2672 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2673 if (found_addr != NULL) { 2674 switch (found_addr->sa_family) { 2675 #ifdef INET6 2676 case AF_INET6: 2677 /* copy IPv6 address */ 2678 lookup->ph.param_type = 2679 htons(SCTP_IPV6_ADDRESS); 2680 p_size = sizeof(struct sctp_ipv6addr_param); 2681 addr_size = sizeof(struct in6_addr); 2682 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2683 found_addr)->sin6_addr; 2684 break; 2685 #endif 2686 #ifdef INET 2687 case AF_INET: 2688 /* copy IPv4 address */ 2689 lookup->ph.param_type = 2690 htons(SCTP_IPV4_ADDRESS); 2691 p_size = sizeof(struct sctp_ipv4addr_param); 2692 addr_size = sizeof(struct in_addr); 2693 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2694 found_addr)->sin_addr; 2695 break; 2696 #endif 2697 default: 2698 p_size = 0; 2699 addr_size = 0; 2700 addr_ptr = NULL; 2701 break; 2702 } 2703 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2704 memcpy(lookup->addr, addr_ptr, addr_size); 2705 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2706 } else { 2707 /* uh oh... don't have any address?? */ 2708 SCTPDBG(SCTP_DEBUG_ASCONF1, 2709 "compose_asconf: no lookup addr!\n"); 2710 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2711 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2712 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2713 bzero(lookup->addr, sizeof(struct in_addr)); 2714 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2715 } 2716 } 2717 /* chain it all together */ 2718 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2719 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2720 acp->ch.chunk_length = ntohs(*retlen); 2721 2722 return (m_asconf_chk); 2723 } 2724 2725 /* 2726 * section to handle address changes before an association is up eg. changes 2727 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2728 */ 2729 2730 /* 2731 * processes the (local) addresses in the INIT-ACK chunk 2732 */ 2733 static void 2734 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2735 unsigned int offset, unsigned int length) 2736 { 2737 struct sctp_paramhdr tmp_param, *ph; 2738 uint16_t plen, ptype; 2739 struct sctp_ifa *sctp_ifa; 2740 2741 #ifdef INET6 2742 struct sctp_ipv6addr_param addr6_store; 2743 struct sockaddr_in6 sin6; 2744 2745 #endif 2746 #ifdef INET 2747 struct sctp_ipv4addr_param addr4_store; 2748 struct sockaddr_in sin; 2749 2750 #endif 2751 struct sockaddr *sa; 2752 uint32_t vrf_id; 2753 2754 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2755 if (stcb == NULL) /* Un-needed check for SA */ 2756 return; 2757 2758 /* convert to upper bound */ 2759 length += offset; 2760 2761 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2762 return; 2763 } 2764 /* init the addresses */ 2765 #ifdef INET6 2766 bzero(&sin6, sizeof(sin6)); 2767 sin6.sin6_family = AF_INET6; 2768 sin6.sin6_len = sizeof(sin6); 2769 sin6.sin6_port = stcb->rport; 2770 #endif 2771 2772 #ifdef INET 2773 bzero(&sin, sizeof(sin)); 2774 sin.sin_family = AF_INET; 2775 sin.sin_len = sizeof(sin); 2776 sin.sin_port = stcb->rport; 2777 #endif 2778 2779 /* go through the addresses in the init-ack */ 2780 ph = (struct sctp_paramhdr *) 2781 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2782 (uint8_t *) & tmp_param); 2783 while (ph != NULL) { 2784 ptype = ntohs(ph->param_type); 2785 plen = ntohs(ph->param_length); 2786 switch (ptype) { 2787 #ifdef INET6 2788 case SCTP_IPV6_ADDRESS: 2789 { 2790 struct sctp_ipv6addr_param *a6p; 2791 2792 /* get the entire IPv6 address param */ 2793 a6p = (struct sctp_ipv6addr_param *) 2794 sctp_m_getptr(m, offset, 2795 sizeof(struct sctp_ipv6addr_param), 2796 (uint8_t *) & addr6_store); 2797 if (plen != sizeof(struct sctp_ipv6addr_param) || 2798 a6p == NULL) { 2799 return; 2800 } 2801 memcpy(&sin6.sin6_addr, a6p->addr, 2802 sizeof(struct in6_addr)); 2803 sa = (struct sockaddr *)&sin6; 2804 break; 2805 } 2806 #endif 2807 #ifdef INET 2808 case SCTP_IPV4_ADDRESS: 2809 { 2810 struct sctp_ipv4addr_param *a4p; 2811 2812 /* get the entire IPv4 address param */ 2813 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2814 sizeof(struct sctp_ipv4addr_param), 2815 (uint8_t *) & addr4_store); 2816 if (plen != sizeof(struct sctp_ipv4addr_param) || 2817 a4p == NULL) { 2818 return; 2819 } 2820 sin.sin_addr.s_addr = a4p->addr; 2821 sa = (struct sockaddr *)&sin; 2822 break; 2823 } 2824 #endif 2825 default: 2826 goto next_addr; 2827 } 2828 2829 /* see if this address really (still) exists */ 2830 if (stcb) { 2831 vrf_id = stcb->asoc.vrf_id; 2832 } else { 2833 vrf_id = SCTP_DEFAULT_VRFID; 2834 } 2835 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id, 2836 SCTP_ADDR_NOT_LOCKED); 2837 if (sctp_ifa == NULL) { 2838 /* address doesn't exist anymore */ 2839 int status; 2840 2841 /* are ASCONFs allowed ? */ 2842 if ((sctp_is_feature_on(stcb->sctp_ep, 2843 SCTP_PCB_FLAGS_DO_ASCONF)) && 2844 stcb->asoc.peer_supports_asconf) { 2845 /* queue an ASCONF DEL_IP_ADDRESS */ 2846 status = sctp_asconf_queue_sa_delete(stcb, sa); 2847 /* 2848 * if queued ok, and in correct state, send 2849 * out the ASCONF. 2850 */ 2851 if (status == 0 && 2852 SCTP_GET_STATE(&stcb->asoc) == 2853 SCTP_STATE_OPEN) { 2854 #ifdef SCTP_TIMER_BASED_ASCONF 2855 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2856 stcb->sctp_ep, stcb, 2857 stcb->asoc.primary_destination); 2858 #else 2859 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2860 #endif 2861 } 2862 } 2863 } 2864 next_addr: 2865 /* 2866 * Sanity check: Make sure the length isn't 0, otherwise 2867 * we'll be stuck in this loop for a long time... 2868 */ 2869 if (SCTP_SIZE32(plen) == 0) { 2870 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2871 plen, ptype); 2872 return; 2873 } 2874 /* get next parameter */ 2875 offset += SCTP_SIZE32(plen); 2876 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2877 return; 2878 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2879 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2880 } /* while */ 2881 } 2882 2883 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2884 /* 2885 * checks to see if a specific address is in the initack address list returns 2886 * 1 if found, 0 if not 2887 */ 2888 static uint32_t 2889 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2890 { 2891 struct sctp_paramhdr tmp_param, *ph; 2892 uint16_t plen, ptype; 2893 2894 #ifdef INET 2895 struct sockaddr_in *sin; 2896 struct sctp_ipv4addr_param *a4p; 2897 struct sctp_ipv6addr_param addr4_store; 2898 2899 #endif 2900 #ifdef INET6 2901 struct sockaddr_in6 *sin6; 2902 struct sctp_ipv6addr_param *a6p; 2903 struct sctp_ipv6addr_param addr6_store; 2904 struct sockaddr_in6 sin6_tmp; 2905 2906 #endif 2907 2908 switch (sa->sa_family) { 2909 #ifdef INET 2910 case AF_INET: 2911 break; 2912 #endif 2913 #ifdef INET6 2914 case AF_INET6: 2915 break; 2916 #endif 2917 default: 2918 return (0); 2919 } 2920 2921 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2922 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2923 /* convert to upper bound */ 2924 length += offset; 2925 2926 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2927 SCTPDBG(SCTP_DEBUG_ASCONF1, 2928 "find_initack_addr: invalid offset?\n"); 2929 return (0); 2930 } 2931 /* go through the addresses in the init-ack */ 2932 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2933 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2934 while (ph != NULL) { 2935 ptype = ntohs(ph->param_type); 2936 plen = ntohs(ph->param_length); 2937 switch (ptype) { 2938 #ifdef INET6 2939 case SCTP_IPV6_ADDRESS: 2940 if (sa->sa_family == AF_INET6) { 2941 /* get the entire IPv6 address param */ 2942 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2943 break; 2944 } 2945 /* get the entire IPv6 address param */ 2946 a6p = (struct sctp_ipv6addr_param *) 2947 sctp_m_getptr(m, offset, 2948 sizeof(struct sctp_ipv6addr_param), 2949 (uint8_t *) & addr6_store); 2950 if (a6p == NULL) { 2951 return (0); 2952 } 2953 sin6 = (struct sockaddr_in6 *)sa; 2954 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2955 /* create a copy and clear scope */ 2956 memcpy(&sin6_tmp, sin6, 2957 sizeof(struct sockaddr_in6)); 2958 sin6 = &sin6_tmp; 2959 in6_clearscope(&sin6->sin6_addr); 2960 } 2961 if (memcmp(&sin6->sin6_addr, a6p->addr, 2962 sizeof(struct in6_addr)) == 0) { 2963 /* found it */ 2964 return (1); 2965 } 2966 } 2967 break; 2968 #endif /* INET6 */ 2969 #ifdef INET 2970 case SCTP_IPV4_ADDRESS: 2971 if (sa->sa_family == AF_INET) { 2972 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2973 break; 2974 } 2975 /* get the entire IPv4 address param */ 2976 a4p = (struct sctp_ipv4addr_param *) 2977 sctp_m_getptr(m, offset, 2978 sizeof(struct sctp_ipv4addr_param), 2979 (uint8_t *) & addr4_store); 2980 if (a4p == NULL) { 2981 return (0); 2982 } 2983 sin = (struct sockaddr_in *)sa; 2984 if (sin->sin_addr.s_addr == a4p->addr) { 2985 /* found it */ 2986 return (1); 2987 } 2988 } 2989 break; 2990 #endif 2991 default: 2992 break; 2993 } 2994 /* get next parameter */ 2995 offset += SCTP_SIZE32(plen); 2996 if (offset + sizeof(struct sctp_paramhdr) > length) { 2997 return (0); 2998 } 2999 ph = (struct sctp_paramhdr *) 3000 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3001 (uint8_t *) & tmp_param); 3002 } /* while */ 3003 /* not found! */ 3004 return (0); 3005 } 3006 3007 /* 3008 * makes sure that the current endpoint local addr list is consistent with 3009 * the new association (eg. subset bound, asconf allowed) adds addresses as 3010 * necessary 3011 */ 3012 static void 3013 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3014 int length, struct sockaddr *init_addr) 3015 { 3016 struct sctp_laddr *laddr; 3017 3018 /* go through the endpoint list */ 3019 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3020 /* be paranoid and validate the laddr */ 3021 if (laddr->ifa == NULL) { 3022 SCTPDBG(SCTP_DEBUG_ASCONF1, 3023 "check_addr_list_ep: laddr->ifa is NULL"); 3024 continue; 3025 } 3026 if (laddr->ifa == NULL) { 3027 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3028 continue; 3029 } 3030 /* do i have it implicitly? */ 3031 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3032 continue; 3033 } 3034 /* check to see if in the init-ack */ 3035 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3036 /* try to add it */ 3037 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3038 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3039 } 3040 } 3041 } 3042 3043 /* 3044 * makes sure that the current kernel address list is consistent with the new 3045 * association (with all addrs bound) adds addresses as necessary 3046 */ 3047 static void 3048 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3049 int length, struct sockaddr *init_addr, 3050 uint16_t local_scope, uint16_t site_scope, 3051 uint16_t ipv4_scope, uint16_t loopback_scope) 3052 { 3053 struct sctp_vrf *vrf = NULL; 3054 struct sctp_ifn *sctp_ifn; 3055 struct sctp_ifa *sctp_ifa; 3056 uint32_t vrf_id; 3057 3058 #ifdef INET 3059 struct sockaddr_in *sin; 3060 3061 #endif 3062 #ifdef INET6 3063 struct sockaddr_in6 *sin6; 3064 3065 #endif 3066 3067 if (stcb) { 3068 vrf_id = stcb->asoc.vrf_id; 3069 } else { 3070 return; 3071 } 3072 SCTP_IPI_ADDR_RLOCK(); 3073 vrf = sctp_find_vrf(vrf_id); 3074 if (vrf == NULL) { 3075 SCTP_IPI_ADDR_RUNLOCK(); 3076 return; 3077 } 3078 /* go through all our known interfaces */ 3079 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3080 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3081 /* skip loopback interface */ 3082 continue; 3083 } 3084 /* go through each interface address */ 3085 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3086 /* do i have it implicitly? */ 3087 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3088 continue; 3089 } 3090 switch (sctp_ifa->address.sa.sa_family) { 3091 #ifdef INET 3092 case AF_INET: 3093 sin = (struct sockaddr_in *)&sctp_ifa->address.sin; 3094 if ((ipv4_scope == 0) && 3095 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3096 /* private address not in scope */ 3097 continue; 3098 } 3099 break; 3100 #endif 3101 #ifdef INET6 3102 case AF_INET6: 3103 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sin6; 3104 if ((local_scope == 0) && 3105 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3106 continue; 3107 } 3108 if ((site_scope == 0) && 3109 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3110 continue; 3111 } 3112 break; 3113 #endif 3114 default: 3115 break; 3116 } 3117 /* check to see if in the init-ack */ 3118 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3119 /* try to add it */ 3120 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3121 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3122 SCTP_ADDR_LOCKED); 3123 } 3124 } /* end foreach ifa */ 3125 } /* end foreach ifn */ 3126 SCTP_IPI_ADDR_RUNLOCK(); 3127 } 3128 3129 /* 3130 * validates an init-ack chunk (from a cookie-echo) with current addresses 3131 * adds addresses from the init-ack into our local address list, if needed 3132 * queues asconf adds/deletes addresses as needed and makes appropriate list 3133 * changes for source address selection m, offset: points to the start of the 3134 * address list in an init-ack chunk length: total length of the address 3135 * params only init_addr: address where my INIT-ACK was sent from 3136 */ 3137 void 3138 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3139 int length, struct sockaddr *init_addr, 3140 uint16_t local_scope, uint16_t site_scope, 3141 uint16_t ipv4_scope, uint16_t loopback_scope) 3142 { 3143 /* process the local addresses in the initack */ 3144 sctp_process_initack_addresses(stcb, m, offset, length); 3145 3146 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3147 /* bound all case */ 3148 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3149 local_scope, site_scope, ipv4_scope, loopback_scope); 3150 } else { 3151 /* subset bound case */ 3152 if (sctp_is_feature_on(stcb->sctp_ep, 3153 SCTP_PCB_FLAGS_DO_ASCONF)) { 3154 /* asconf's allowed */ 3155 sctp_check_address_list_ep(stcb, m, offset, length, 3156 init_addr); 3157 } 3158 /* else, no asconfs allowed, so what we sent is what we get */ 3159 } 3160 } 3161 3162 /* 3163 * sctp_bindx() support 3164 */ 3165 uint32_t 3166 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3167 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3168 { 3169 struct sctp_ifa *ifa; 3170 struct sctp_laddr *laddr, *nladdr; 3171 3172 if (sa->sa_len == 0) { 3173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3174 return (EINVAL); 3175 } 3176 if (sctp_ifap) { 3177 ifa = sctp_ifap; 3178 } else if (type == SCTP_ADD_IP_ADDRESS) { 3179 /* For an add the address MUST be on the system */ 3180 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3181 } else if (type == SCTP_DEL_IP_ADDRESS) { 3182 /* For a delete we need to find it in the inp */ 3183 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3184 } else { 3185 ifa = NULL; 3186 } 3187 if (ifa != NULL) { 3188 if (type == SCTP_ADD_IP_ADDRESS) { 3189 sctp_add_local_addr_ep(inp, ifa, type); 3190 } else if (type == SCTP_DEL_IP_ADDRESS) { 3191 if (inp->laddr_count < 2) { 3192 /* can't delete the last local address */ 3193 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3194 return (EINVAL); 3195 } 3196 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3197 sctp_nxt_addr) { 3198 if (ifa == laddr->ifa) { 3199 /* Mark in the delete */ 3200 laddr->action = type; 3201 } 3202 } 3203 } 3204 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3205 /* 3206 * There is no need to start the iterator if the inp 3207 * has no associations. 3208 */ 3209 if (type == SCTP_DEL_IP_ADDRESS) { 3210 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3211 if (laddr->ifa == ifa) { 3212 sctp_del_local_addr_ep(inp, ifa); 3213 } 3214 } 3215 } 3216 } else { 3217 struct sctp_asconf_iterator *asc; 3218 struct sctp_laddr *wi; 3219 3220 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3221 sizeof(struct sctp_asconf_iterator), 3222 SCTP_M_ASC_IT); 3223 if (asc == NULL) { 3224 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3225 return (ENOMEM); 3226 } 3227 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3228 if (wi == NULL) { 3229 SCTP_FREE(asc, SCTP_M_ASC_IT); 3230 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3231 return (ENOMEM); 3232 } 3233 LIST_INIT(&asc->list_of_work); 3234 asc->cnt = 1; 3235 SCTP_INCR_LADDR_COUNT(); 3236 wi->ifa = ifa; 3237 wi->action = type; 3238 atomic_add_int(&ifa->refcount, 1); 3239 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3240 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3241 sctp_asconf_iterator_stcb, 3242 sctp_asconf_iterator_ep_end, 3243 SCTP_PCB_ANY_FLAGS, 3244 SCTP_PCB_ANY_FEATURES, 3245 SCTP_ASOC_ANY_STATE, 3246 (void *)asc, 0, 3247 sctp_asconf_iterator_end, inp, 0); 3248 } 3249 return (0); 3250 } else { 3251 /* invalid address! */ 3252 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3253 return (EADDRNOTAVAIL); 3254 } 3255 } 3256 3257 void 3258 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3259 struct sctp_nets *net) 3260 { 3261 struct sctp_asconf_addr *aa; 3262 struct sctp_ifa *sctp_ifap; 3263 struct sctp_asconf_tag_param *vtag; 3264 3265 #ifdef INET 3266 struct sockaddr_in *to; 3267 3268 #endif 3269 #ifdef INET6 3270 struct sockaddr_in6 *to6; 3271 3272 #endif 3273 if (net == NULL) { 3274 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3275 return; 3276 } 3277 if (stcb == NULL) { 3278 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3279 return; 3280 } 3281 /* 3282 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3283 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3284 */ 3285 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3286 SCTP_M_ASC_ADDR); 3287 if (aa == NULL) { 3288 /* didn't get memory */ 3289 SCTPDBG(SCTP_DEBUG_ASCONF1, 3290 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3291 return; 3292 } 3293 aa->special_del = 0; 3294 /* fill in asconf address parameter fields */ 3295 /* top level elements are "networked" during send */ 3296 aa->ifa = NULL; 3297 aa->sent = 0; /* clear sent flag */ 3298 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3299 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3300 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3301 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3302 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3303 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3304 3305 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3306 SCTP_M_ASC_ADDR); 3307 if (aa == NULL) { 3308 /* didn't get memory */ 3309 SCTPDBG(SCTP_DEBUG_ASCONF1, 3310 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3311 return; 3312 } 3313 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3314 /* fill in asconf address parameter fields */ 3315 /* ADD(0.0.0.0) */ 3316 switch (net->ro._l_addr.sa.sa_family) { 3317 #ifdef INET 3318 case AF_INET: 3319 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3320 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3321 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3322 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3323 /* No need to add an address, we are using 0.0.0.0 */ 3324 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3325 break; 3326 #endif 3327 #ifdef INET6 3328 case AF_INET6: 3329 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3330 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3331 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3332 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3333 /* No need to add an address, we are using 0.0.0.0 */ 3334 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3335 break; 3336 #endif 3337 } 3338 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3339 SCTP_M_ASC_ADDR); 3340 if (aa == NULL) { 3341 /* didn't get memory */ 3342 SCTPDBG(SCTP_DEBUG_ASCONF1, 3343 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3344 return; 3345 } 3346 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3347 /* fill in asconf address parameter fields */ 3348 /* ADD(0.0.0.0) */ 3349 switch (net->ro._l_addr.sa.sa_family) { 3350 #ifdef INET 3351 case AF_INET: 3352 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3353 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3354 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3355 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3356 /* No need to add an address, we are using 0.0.0.0 */ 3357 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3358 break; 3359 #endif 3360 #ifdef INET6 3361 case AF_INET6: 3362 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3363 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3364 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3365 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3366 /* No need to add an address, we are using 0.0.0.0 */ 3367 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3368 break; 3369 #endif 3370 } 3371 /* Now we must hunt the addresses and add all global addresses */ 3372 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3373 struct sctp_vrf *vrf = NULL; 3374 struct sctp_ifn *sctp_ifnp; 3375 uint32_t vrf_id; 3376 3377 vrf_id = stcb->sctp_ep->def_vrf_id; 3378 vrf = sctp_find_vrf(vrf_id); 3379 if (vrf == NULL) { 3380 goto skip_rest; 3381 } 3382 SCTP_IPI_ADDR_RLOCK(); 3383 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3384 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3385 switch (sctp_ifap->address.sa.sa_family) { 3386 #ifdef INET 3387 case AF_INET: 3388 to = &sctp_ifap->address.sin; 3389 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3390 continue; 3391 } 3392 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3393 continue; 3394 } 3395 break; 3396 #endif 3397 #ifdef INET6 3398 case AF_INET6: 3399 to6 = &sctp_ifap->address.sin6; 3400 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3401 continue; 3402 } 3403 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3404 continue; 3405 } 3406 break; 3407 #endif 3408 default: 3409 continue; 3410 } 3411 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3412 } 3413 } 3414 SCTP_IPI_ADDR_RUNLOCK(); 3415 } else { 3416 struct sctp_laddr *laddr; 3417 3418 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3419 if (laddr->ifa == NULL) { 3420 continue; 3421 } 3422 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3423 /* 3424 * Address being deleted by the system, dont 3425 * list. 3426 */ 3427 continue; 3428 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3429 /* 3430 * Address being deleted on this ep don't 3431 * list. 3432 */ 3433 continue; 3434 } 3435 sctp_ifap = laddr->ifa; 3436 switch (sctp_ifap->address.sa.sa_family) { 3437 #ifdef INET 3438 case AF_INET: 3439 to = &sctp_ifap->address.sin; 3440 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3441 continue; 3442 } 3443 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3444 continue; 3445 } 3446 break; 3447 #endif 3448 #ifdef INET6 3449 case AF_INET6: 3450 to6 = &sctp_ifap->address.sin6; 3451 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3452 continue; 3453 } 3454 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3455 continue; 3456 } 3457 break; 3458 #endif 3459 default: 3460 continue; 3461 } 3462 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3463 } 3464 } 3465 skip_rest: 3466 /* Now we must send the asconf into the queue */ 3467 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3468 } 3469