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_DONTWAIT, 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_DONTWAIT, 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_DONTWAIT, 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 struct sockaddr *sa; 1195 1196 /* make sure the request isn't already in the queue */ 1197 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1198 /* address match? */ 1199 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1200 continue; 1201 /* 1202 * is the request already in queue but not sent? pass the 1203 * request already sent in order to resolve the following 1204 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1205 * can't remove the ADD request already sent 3. arrival of 1206 * ADD 1207 */ 1208 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1209 return (-1); 1210 } 1211 /* is the negative request already in queue, and not sent */ 1212 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1213 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1214 /* add requested, delete already queued */ 1215 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1216 /* remove the ifa from the restricted list */ 1217 sctp_del_local_addr_restricted(stcb, ifa); 1218 /* free the asconf param */ 1219 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1220 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1221 return (-1); 1222 } 1223 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1224 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1225 /* delete requested, add already queued */ 1226 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1227 /* remove the aa->ifa from the restricted list */ 1228 sctp_del_local_addr_restricted(stcb, aa->ifa); 1229 /* free the asconf param */ 1230 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1231 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1232 return (-1); 1233 } 1234 } /* for each aa */ 1235 1236 /* adding new request to the queue */ 1237 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1238 SCTP_M_ASC_ADDR); 1239 if (aa == NULL) { 1240 /* didn't get memory */ 1241 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1242 return (-1); 1243 } 1244 aa->special_del = 0; 1245 /* fill in asconf address parameter fields */ 1246 /* top level elements are "networked" during send */ 1247 aa->ap.aph.ph.param_type = type; 1248 aa->ifa = ifa; 1249 atomic_add_int(&ifa->refcount, 1); 1250 /* correlation_id filled in during send routine later... */ 1251 switch (ifa->address.sa.sa_family) { 1252 #ifdef INET6 1253 case AF_INET6: 1254 { 1255 struct sockaddr_in6 *sin6; 1256 1257 sin6 = (struct sockaddr_in6 *)&ifa->address.sa; 1258 sa = (struct sockaddr *)sin6; 1259 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1260 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1261 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1262 sizeof(struct sctp_ipv6addr_param); 1263 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1264 sizeof(struct in6_addr)); 1265 break; 1266 } 1267 #endif 1268 #ifdef INET 1269 case AF_INET: 1270 { 1271 struct sockaddr_in *sin; 1272 1273 sin = (struct sockaddr_in *)&ifa->address.sa; 1274 sa = (struct sockaddr *)sin; 1275 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1276 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1277 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1278 sizeof(struct sctp_ipv4addr_param); 1279 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1280 sizeof(struct in_addr)); 1281 break; 1282 } 1283 #endif 1284 default: 1285 /* invalid family! */ 1286 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1287 sctp_free_ifa(ifa); 1288 return (-1); 1289 } 1290 aa->sent = 0; /* clear sent flag */ 1291 1292 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1293 #ifdef SCTP_DEBUG 1294 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1295 if (type == SCTP_ADD_IP_ADDRESS) { 1296 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1297 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1298 } else if (type == SCTP_DEL_IP_ADDRESS) { 1299 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1300 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1301 } else { 1302 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1303 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1304 } 1305 } 1306 #endif 1307 1308 return (0); 1309 } 1310 1311 1312 /* 1313 * add an asconf operation for the given ifa and type. 1314 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1315 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1316 * advisable. 1317 */ 1318 static int 1319 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1320 uint16_t type) 1321 { 1322 uint32_t status; 1323 int pending_delete_queued = 0; 1324 1325 /* see if peer supports ASCONF */ 1326 if (stcb->asoc.peer_supports_asconf == 0) { 1327 return (-1); 1328 } 1329 /* 1330 * if this is deleting the last address from the assoc, mark it as 1331 * pending. 1332 */ 1333 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending && 1334 (sctp_local_addr_count(stcb) < 2)) { 1335 /* set the pending delete info only */ 1336 stcb->asoc.asconf_del_pending = 1; 1337 stcb->asoc.asconf_addr_del_pending = ifa; 1338 atomic_add_int(&ifa->refcount, 1); 1339 SCTPDBG(SCTP_DEBUG_ASCONF2, 1340 "asconf_queue_add: mark delete last address pending\n"); 1341 return (-1); 1342 } 1343 /* queue an asconf parameter */ 1344 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1345 1346 /* 1347 * if this is an add, and there is a delete also pending (i.e. the 1348 * last local address is being changed), queue the pending delete 1349 * too. 1350 */ 1351 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1352 /* queue in the pending delete */ 1353 if (sctp_asconf_queue_mgmt(stcb, 1354 stcb->asoc.asconf_addr_del_pending, 1355 SCTP_DEL_IP_ADDRESS) == 0) { 1356 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1357 pending_delete_queued = 1; 1358 /* clear out the pending delete info */ 1359 stcb->asoc.asconf_del_pending = 0; 1360 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1361 stcb->asoc.asconf_addr_del_pending = NULL; 1362 } 1363 } 1364 if (pending_delete_queued) { 1365 struct sctp_nets *net; 1366 1367 /* 1368 * since we know that the only/last address is now being 1369 * changed in this case, reset the cwnd/rto on all nets to 1370 * start as a new address and path. Also clear the error 1371 * counts to give the assoc the best chance to complete the 1372 * address change. 1373 */ 1374 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1375 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1376 net); 1377 net->RTO = 0; 1378 net->error_count = 0; 1379 } 1380 stcb->asoc.overall_error_count = 0; 1381 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1382 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1383 stcb->asoc.overall_error_count, 1384 0, 1385 SCTP_FROM_SCTP_ASCONF, 1386 __LINE__); 1387 } 1388 /* queue in an advisory set primary too */ 1389 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1390 /* let caller know we should send this out immediately */ 1391 status = 1; 1392 } 1393 return (status); 1394 } 1395 1396 /*- 1397 * add an asconf delete IP address parameter to the queue by sockaddr and 1398 * possibly with no sctp_ifa available. This is only called by the routine 1399 * that checks the addresses in an INIT-ACK against the current address list. 1400 * returns 0 if completed, non-zero if not completed. 1401 * NOTE: if an add is already scheduled (and not yet sent out), simply 1402 * remove it from queue. If a duplicate operation is found, ignore the 1403 * new one. 1404 */ 1405 static int 1406 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1407 { 1408 struct sctp_ifa *ifa; 1409 struct sctp_asconf_addr *aa, *aa_next; 1410 uint32_t vrf_id; 1411 1412 if (stcb == NULL) { 1413 return (-1); 1414 } 1415 /* see if peer supports ASCONF */ 1416 if (stcb->asoc.peer_supports_asconf == 0) { 1417 return (-1); 1418 } 1419 /* make sure the request isn't already in the queue */ 1420 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1421 /* address match? */ 1422 if (sctp_asconf_addr_match(aa, sa) == 0) 1423 continue; 1424 /* is the request already in queue (sent or not) */ 1425 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1426 return (-1); 1427 } 1428 /* is the negative request already in queue, and not sent */ 1429 if (aa->sent == 1) 1430 continue; 1431 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1432 /* add already queued, so remove existing entry */ 1433 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1434 sctp_del_local_addr_restricted(stcb, aa->ifa); 1435 /* free the entry */ 1436 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1437 return (-1); 1438 } 1439 } /* for each aa */ 1440 1441 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1442 if (stcb) { 1443 vrf_id = stcb->asoc.vrf_id; 1444 } else { 1445 vrf_id = SCTP_DEFAULT_VRFID; 1446 } 1447 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 1448 1449 /* adding new request to the queue */ 1450 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1451 SCTP_M_ASC_ADDR); 1452 if (aa == NULL) { 1453 /* didn't get memory */ 1454 SCTPDBG(SCTP_DEBUG_ASCONF1, 1455 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1456 return (-1); 1457 } 1458 aa->special_del = 0; 1459 /* fill in asconf address parameter fields */ 1460 /* top level elements are "networked" during send */ 1461 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1462 aa->ifa = ifa; 1463 if (ifa) 1464 atomic_add_int(&ifa->refcount, 1); 1465 /* correlation_id filled in during send routine later... */ 1466 switch (sa->sa_family) { 1467 #ifdef INET6 1468 case AF_INET6: 1469 { 1470 /* IPv6 address */ 1471 struct sockaddr_in6 *sin6; 1472 1473 sin6 = (struct sockaddr_in6 *)sa; 1474 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1475 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1476 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1477 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1478 sizeof(struct in6_addr)); 1479 break; 1480 } 1481 #endif 1482 #ifdef INET 1483 case AF_INET: 1484 { 1485 /* IPv4 address */ 1486 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1487 1488 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1489 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1490 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1491 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1492 sizeof(struct in_addr)); 1493 break; 1494 } 1495 #endif 1496 default: 1497 /* invalid family! */ 1498 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1499 if (ifa) 1500 sctp_free_ifa(ifa); 1501 return (-1); 1502 } 1503 aa->sent = 0; /* clear sent flag */ 1504 1505 /* delete goes to the back of the queue */ 1506 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1507 1508 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1509 return (0); 1510 } 1511 1512 /* 1513 * find a specific asconf param on our "sent" queue 1514 */ 1515 static struct sctp_asconf_addr * 1516 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1517 { 1518 struct sctp_asconf_addr *aa; 1519 1520 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1521 if (aa->ap.aph.correlation_id == correlation_id && 1522 aa->sent == 1) { 1523 /* found it */ 1524 return (aa); 1525 } 1526 } 1527 /* didn't find it */ 1528 return (NULL); 1529 } 1530 1531 /* 1532 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1533 * notifications based on the error response 1534 */ 1535 static void 1536 sctp_asconf_process_error(struct sctp_tcb *stcb, 1537 struct sctp_asconf_paramhdr *aph) 1538 { 1539 struct sctp_error_cause *eh; 1540 struct sctp_paramhdr *ph; 1541 uint16_t param_type; 1542 uint16_t error_code; 1543 1544 eh = (struct sctp_error_cause *)(aph + 1); 1545 ph = (struct sctp_paramhdr *)(eh + 1); 1546 /* validate lengths */ 1547 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1548 htons(aph->ph.param_length)) { 1549 /* invalid error cause length */ 1550 SCTPDBG(SCTP_DEBUG_ASCONF1, 1551 "asconf_process_error: cause element too long\n"); 1552 return; 1553 } 1554 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1555 htons(eh->length)) { 1556 /* invalid included TLV length */ 1557 SCTPDBG(SCTP_DEBUG_ASCONF1, 1558 "asconf_process_error: included TLV too long\n"); 1559 return; 1560 } 1561 /* which error code ? */ 1562 error_code = ntohs(eh->code); 1563 param_type = ntohs(aph->ph.param_type); 1564 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1565 switch (error_code) { 1566 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1567 /* we allow ourselves to "try again" for this error */ 1568 break; 1569 default: 1570 /* peer can't handle it... */ 1571 switch (param_type) { 1572 case SCTP_ADD_IP_ADDRESS: 1573 case SCTP_DEL_IP_ADDRESS: 1574 stcb->asoc.peer_supports_asconf = 0; 1575 break; 1576 case SCTP_SET_PRIM_ADDR: 1577 stcb->asoc.peer_supports_asconf = 0; 1578 break; 1579 default: 1580 break; 1581 } 1582 } 1583 } 1584 1585 /* 1586 * process an asconf queue param. 1587 * aparam: parameter to process, will be removed from the queue. 1588 * flag: 1=success case, 0=failure case 1589 */ 1590 static void 1591 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1592 struct sctp_asconf_addr *aparam, uint32_t flag) 1593 { 1594 uint16_t param_type; 1595 1596 /* process this param */ 1597 param_type = aparam->ap.aph.ph.param_type; 1598 switch (param_type) { 1599 case SCTP_ADD_IP_ADDRESS: 1600 SCTPDBG(SCTP_DEBUG_ASCONF1, 1601 "process_param_ack: added IP address\n"); 1602 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1603 break; 1604 case SCTP_DEL_IP_ADDRESS: 1605 SCTPDBG(SCTP_DEBUG_ASCONF1, 1606 "process_param_ack: deleted IP address\n"); 1607 /* nothing really to do... lists already updated */ 1608 break; 1609 case SCTP_SET_PRIM_ADDR: 1610 SCTPDBG(SCTP_DEBUG_ASCONF1, 1611 "process_param_ack: set primary IP address\n"); 1612 /* nothing to do... peer may start using this addr */ 1613 if (flag == 0) 1614 stcb->asoc.peer_supports_asconf = 0; 1615 break; 1616 default: 1617 /* should NEVER happen */ 1618 break; 1619 } 1620 1621 /* remove the param and free it */ 1622 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1623 if (aparam->ifa) 1624 sctp_free_ifa(aparam->ifa); 1625 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1626 } 1627 1628 /* 1629 * cleanup from a bad asconf ack parameter 1630 */ 1631 static void 1632 sctp_asconf_ack_clear(struct sctp_tcb *stcb) 1633 { 1634 /* assume peer doesn't really know how to do asconfs */ 1635 stcb->asoc.peer_supports_asconf = 0; 1636 /* XXX we could free the pending queue here */ 1637 } 1638 1639 void 1640 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1641 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1642 struct sctp_nets *net, int *abort_no_unlock) 1643 { 1644 struct sctp_association *asoc; 1645 uint32_t serial_num; 1646 uint16_t ack_length; 1647 struct sctp_asconf_paramhdr *aph; 1648 struct sctp_asconf_addr *aa, *aa_next; 1649 uint32_t last_error_id = 0; /* last error correlation id */ 1650 uint32_t id; 1651 struct sctp_asconf_addr *ap; 1652 1653 /* asconf param buffer */ 1654 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1655 1656 /* verify minimum length */ 1657 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1658 SCTPDBG(SCTP_DEBUG_ASCONF1, 1659 "handle_asconf_ack: chunk too small = %xh\n", 1660 ntohs(cp->ch.chunk_length)); 1661 return; 1662 } 1663 asoc = &stcb->asoc; 1664 serial_num = ntohl(cp->serial_number); 1665 1666 /* 1667 * NOTE: we may want to handle this differently- currently, we will 1668 * abort when we get an ack for the expected serial number + 1 (eg. 1669 * we didn't send it), process an ack normally if it is the expected 1670 * serial number, and re-send the previous ack for *ALL* other 1671 * serial numbers 1672 */ 1673 1674 /* 1675 * if the serial number is the next expected, but I didn't send it, 1676 * abort the asoc, since someone probably just hijacked us... 1677 */ 1678 if (serial_num == (asoc->asconf_seq_out + 1)) { 1679 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1680 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED); 1681 *abort_no_unlock = 1; 1682 return; 1683 } 1684 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1685 /* got a duplicate/unexpected ASCONF-ACK */ 1686 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1687 serial_num, asoc->asconf_seq_out_acked + 1); 1688 return; 1689 } 1690 if (serial_num == asoc->asconf_seq_out - 1) { 1691 /* stop our timer */ 1692 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1693 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1694 } 1695 /* process the ASCONF-ACK contents */ 1696 ack_length = ntohs(cp->ch.chunk_length) - 1697 sizeof(struct sctp_asconf_ack_chunk); 1698 offset += sizeof(struct sctp_asconf_ack_chunk); 1699 /* process through all parameters */ 1700 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1701 unsigned int param_length, param_type; 1702 1703 /* get pointer to next asconf parameter */ 1704 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1705 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1706 if (aph == NULL) { 1707 /* can't get an asconf paramhdr */ 1708 sctp_asconf_ack_clear(stcb); 1709 return; 1710 } 1711 param_type = ntohs(aph->ph.param_type); 1712 param_length = ntohs(aph->ph.param_length); 1713 if (param_length > ack_length) { 1714 sctp_asconf_ack_clear(stcb); 1715 return; 1716 } 1717 if (param_length < sizeof(struct sctp_paramhdr)) { 1718 sctp_asconf_ack_clear(stcb); 1719 return; 1720 } 1721 /* get the complete parameter... */ 1722 if (param_length > sizeof(aparam_buf)) { 1723 SCTPDBG(SCTP_DEBUG_ASCONF1, 1724 "param length (%u) larger than buffer size!\n", param_length); 1725 sctp_asconf_ack_clear(stcb); 1726 return; 1727 } 1728 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1729 if (aph == NULL) { 1730 sctp_asconf_ack_clear(stcb); 1731 return; 1732 } 1733 /* correlation_id is transparent to peer, no ntohl needed */ 1734 id = aph->correlation_id; 1735 1736 switch (param_type) { 1737 case SCTP_ERROR_CAUSE_IND: 1738 last_error_id = id; 1739 /* find the corresponding asconf param in our queue */ 1740 ap = sctp_asconf_find_param(stcb, id); 1741 if (ap == NULL) { 1742 /* hmm... can't find this in our queue! */ 1743 break; 1744 } 1745 /* process the parameter, failed flag */ 1746 sctp_asconf_process_param_ack(stcb, ap, 0); 1747 /* process the error response */ 1748 sctp_asconf_process_error(stcb, aph); 1749 break; 1750 case SCTP_SUCCESS_REPORT: 1751 /* find the corresponding asconf param in our queue */ 1752 ap = sctp_asconf_find_param(stcb, id); 1753 if (ap == NULL) { 1754 /* hmm... can't find this in our queue! */ 1755 break; 1756 } 1757 /* process the parameter, success flag */ 1758 sctp_asconf_process_param_ack(stcb, ap, 1); 1759 break; 1760 default: 1761 break; 1762 } /* switch */ 1763 1764 /* update remaining ASCONF-ACK message length to process */ 1765 ack_length -= SCTP_SIZE32(param_length); 1766 if (ack_length <= 0) { 1767 /* no more data in the mbuf chain */ 1768 break; 1769 } 1770 offset += SCTP_SIZE32(param_length); 1771 } /* while */ 1772 1773 /* 1774 * if there are any "sent" params still on the queue, these are 1775 * implicitly "success", or "failed" (if we got an error back) ... 1776 * so process these appropriately 1777 * 1778 * we assume that the correlation_id's are monotonically increasing 1779 * beginning from 1 and that we don't have *that* many outstanding 1780 * at any given time 1781 */ 1782 if (last_error_id == 0) 1783 last_error_id--;/* set to "max" value */ 1784 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1785 if (aa->sent == 1) { 1786 /* 1787 * implicitly successful or failed if correlation_id 1788 * < last_error_id, then success else, failure 1789 */ 1790 if (aa->ap.aph.correlation_id < last_error_id) 1791 sctp_asconf_process_param_ack(stcb, aa, 1); 1792 else 1793 sctp_asconf_process_param_ack(stcb, aa, 0); 1794 } else { 1795 /* 1796 * since we always process in order (FIFO queue) if 1797 * we reach one that hasn't been sent, the rest 1798 * should not have been sent either. so, we're 1799 * done... 1800 */ 1801 break; 1802 } 1803 } 1804 1805 /* update the next sequence number to use */ 1806 asoc->asconf_seq_out_acked++; 1807 /* remove the old ASCONF on our outbound queue */ 1808 sctp_toss_old_asconf(stcb); 1809 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1810 #ifdef SCTP_TIMER_BASED_ASCONF 1811 /* we have more params, so restart our timer */ 1812 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1813 stcb, net); 1814 #else 1815 /* we have more params, so send out more */ 1816 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1817 #endif 1818 } 1819 } 1820 1821 #ifdef INET6 1822 static uint32_t 1823 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1824 { 1825 struct sockaddr_in6 *sin6, *net6; 1826 struct sctp_nets *net; 1827 1828 if (sa->sa_family != AF_INET6) { 1829 /* wrong family */ 1830 return (0); 1831 } 1832 sin6 = (struct sockaddr_in6 *)sa; 1833 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1834 /* not link local address */ 1835 return (0); 1836 } 1837 /* hunt through our destination nets list for this scope_id */ 1838 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1839 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1840 AF_INET6) 1841 continue; 1842 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1843 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1844 continue; 1845 if (sctp_is_same_scope(sin6, net6)) { 1846 /* found one */ 1847 return (1); 1848 } 1849 } 1850 /* didn't find one */ 1851 return (0); 1852 } 1853 1854 #endif 1855 1856 /* 1857 * address management functions 1858 */ 1859 static void 1860 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1861 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1862 { 1863 int status; 1864 1865 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1866 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1867 /* subset bound, no ASCONF allowed case, so ignore */ 1868 return; 1869 } 1870 /* 1871 * note: we know this is not the subset bound, no ASCONF case eg. 1872 * this is boundall or subset bound w/ASCONF allowed 1873 */ 1874 1875 /* first, make sure it's a good address family */ 1876 switch (ifa->address.sa.sa_family) { 1877 #ifdef INET6 1878 case AF_INET6: 1879 break; 1880 #endif 1881 #ifdef INET 1882 case AF_INET: 1883 break; 1884 #endif 1885 default: 1886 return; 1887 } 1888 #ifdef INET6 1889 /* make sure we're "allowed" to add this type of addr */ 1890 if (ifa->address.sa.sa_family == AF_INET6) { 1891 /* invalid if we're not a v6 endpoint */ 1892 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1893 return; 1894 /* is the v6 addr really valid ? */ 1895 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1896 return; 1897 } 1898 } 1899 #endif 1900 /* put this address on the "pending/do not use yet" list */ 1901 sctp_add_local_addr_restricted(stcb, ifa); 1902 /* 1903 * check address scope if address is out of scope, don't queue 1904 * anything... note: this would leave the address on both inp and 1905 * asoc lists 1906 */ 1907 switch (ifa->address.sa.sa_family) { 1908 #ifdef INET6 1909 case AF_INET6: 1910 { 1911 struct sockaddr_in6 *sin6; 1912 1913 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 1914 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1915 /* we skip unspecifed addresses */ 1916 return; 1917 } 1918 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1919 if (stcb->asoc.local_scope == 0) { 1920 return; 1921 } 1922 /* is it the right link local scope? */ 1923 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1924 return; 1925 } 1926 } 1927 if (stcb->asoc.site_scope == 0 && 1928 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1929 return; 1930 } 1931 break; 1932 } 1933 #endif 1934 #ifdef INET 1935 case AF_INET: 1936 { 1937 struct sockaddr_in *sin; 1938 struct in6pcb *inp6; 1939 1940 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1941 /* invalid if we are a v6 only endpoint */ 1942 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1943 SCTP_IPV6_V6ONLY(inp6)) 1944 return; 1945 1946 sin = (struct sockaddr_in *)&ifa->address.sa; 1947 if (sin->sin_addr.s_addr == 0) { 1948 /* we skip unspecifed addresses */ 1949 return; 1950 } 1951 if (stcb->asoc.ipv4_local_scope == 0 && 1952 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1953 return; 1954 } 1955 break; 1956 } 1957 #endif 1958 default: 1959 /* else, not AF_INET or AF_INET6, so skip */ 1960 return; 1961 } 1962 1963 /* queue an asconf for this address add/delete */ 1964 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1965 /* does the peer do asconf? */ 1966 if (stcb->asoc.peer_supports_asconf) { 1967 /* queue an asconf for this addr */ 1968 status = sctp_asconf_queue_add(stcb, ifa, type); 1969 1970 /* 1971 * if queued ok, and in the open state, send out the 1972 * ASCONF. If in the non-open state, these will be 1973 * sent when the state goes open. 1974 */ 1975 if (status == 0 && 1976 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1977 #ifdef SCTP_TIMER_BASED_ASCONF 1978 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1979 stcb, stcb->asoc.primary_destination); 1980 #else 1981 sctp_send_asconf(stcb, NULL, addr_locked); 1982 #endif 1983 } 1984 } 1985 } 1986 } 1987 1988 1989 int 1990 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 1991 { 1992 struct sctp_asconf_iterator *asc; 1993 struct sctp_ifa *ifa; 1994 struct sctp_laddr *l; 1995 int cnt_invalid = 0; 1996 1997 asc = (struct sctp_asconf_iterator *)ptr; 1998 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 1999 ifa = l->ifa; 2000 switch (ifa->address.sa.sa_family) { 2001 #ifdef INET6 2002 case AF_INET6: 2003 /* invalid if we're not a v6 endpoint */ 2004 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2005 cnt_invalid++; 2006 if (asc->cnt == cnt_invalid) 2007 return (1); 2008 } 2009 break; 2010 #endif 2011 #ifdef INET 2012 case AF_INET: 2013 { 2014 /* invalid if we are a v6 only endpoint */ 2015 struct in6pcb *inp6; 2016 2017 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2018 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2019 SCTP_IPV6_V6ONLY(inp6)) { 2020 cnt_invalid++; 2021 if (asc->cnt == cnt_invalid) 2022 return (1); 2023 } 2024 break; 2025 } 2026 #endif 2027 default: 2028 /* invalid address family */ 2029 cnt_invalid++; 2030 if (asc->cnt == cnt_invalid) 2031 return (1); 2032 } 2033 } 2034 return (0); 2035 } 2036 2037 static int 2038 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2039 { 2040 struct sctp_ifa *ifa; 2041 struct sctp_asconf_iterator *asc; 2042 struct sctp_laddr *laddr, *nladdr, *l; 2043 2044 /* Only for specific case not bound all */ 2045 asc = (struct sctp_asconf_iterator *)ptr; 2046 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2047 ifa = l->ifa; 2048 if (l->action == SCTP_ADD_IP_ADDRESS) { 2049 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2050 sctp_nxt_addr) { 2051 if (laddr->ifa == ifa) { 2052 laddr->action = 0; 2053 break; 2054 } 2055 } 2056 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2057 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2058 /* remove only after all guys are done */ 2059 if (laddr->ifa == ifa) { 2060 sctp_del_local_addr_ep(inp, ifa); 2061 } 2062 } 2063 } 2064 } 2065 return (0); 2066 } 2067 2068 void 2069 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2070 void *ptr, uint32_t val SCTP_UNUSED) 2071 { 2072 struct sctp_asconf_iterator *asc; 2073 struct sctp_ifa *ifa; 2074 struct sctp_laddr *l; 2075 int cnt_invalid = 0; 2076 int type, status; 2077 int num_queued = 0; 2078 2079 asc = (struct sctp_asconf_iterator *)ptr; 2080 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2081 ifa = l->ifa; 2082 type = l->action; 2083 2084 /* address's vrf_id must be the vrf_id of the assoc */ 2085 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2086 continue; 2087 } 2088 /* Same checks again for assoc */ 2089 switch (ifa->address.sa.sa_family) { 2090 #ifdef INET6 2091 case AF_INET6: 2092 { 2093 /* invalid if we're not a v6 endpoint */ 2094 struct sockaddr_in6 *sin6; 2095 2096 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2097 cnt_invalid++; 2098 if (asc->cnt == cnt_invalid) 2099 return; 2100 else 2101 continue; 2102 } 2103 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 2104 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2105 /* we skip unspecifed addresses */ 2106 continue; 2107 } 2108 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2109 if (stcb->asoc.local_scope == 0) { 2110 continue; 2111 } 2112 /* is it the right link local scope? */ 2113 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2114 continue; 2115 } 2116 } 2117 break; 2118 } 2119 #endif 2120 #ifdef INET 2121 case AF_INET: 2122 { 2123 /* invalid if we are a v6 only endpoint */ 2124 struct in6pcb *inp6; 2125 struct sockaddr_in *sin; 2126 2127 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2128 /* invalid if we are a v6 only endpoint */ 2129 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2130 SCTP_IPV6_V6ONLY(inp6)) 2131 continue; 2132 2133 sin = (struct sockaddr_in *)&ifa->address.sa; 2134 if (sin->sin_addr.s_addr == 0) { 2135 /* we skip unspecifed addresses */ 2136 continue; 2137 } 2138 if (stcb->asoc.ipv4_local_scope == 0 && 2139 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2140 continue; 2141 } 2142 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2143 SCTP_IPV6_V6ONLY(inp6)) { 2144 cnt_invalid++; 2145 if (asc->cnt == cnt_invalid) 2146 return; 2147 else 2148 continue; 2149 } 2150 break; 2151 } 2152 #endif 2153 default: 2154 /* invalid address family */ 2155 cnt_invalid++; 2156 if (asc->cnt == cnt_invalid) 2157 return; 2158 else 2159 continue; 2160 break; 2161 } 2162 2163 if (type == SCTP_ADD_IP_ADDRESS) { 2164 /* prevent this address from being used as a source */ 2165 sctp_add_local_addr_restricted(stcb, ifa); 2166 } else if (type == SCTP_DEL_IP_ADDRESS) { 2167 struct sctp_nets *net; 2168 2169 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2170 sctp_rtentry_t *rt; 2171 2172 /* delete this address if cached */ 2173 if (net->ro._s_addr == ifa) { 2174 sctp_free_ifa(net->ro._s_addr); 2175 net->ro._s_addr = NULL; 2176 net->src_addr_selected = 0; 2177 rt = net->ro.ro_rt; 2178 if (rt) { 2179 RTFREE(rt); 2180 net->ro.ro_rt = NULL; 2181 } 2182 /* 2183 * Now we deleted our src address, 2184 * should we not also now reset the 2185 * cwnd/rto to start as if its a new 2186 * address? 2187 */ 2188 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2189 net->RTO = 0; 2190 2191 } 2192 } 2193 } else if (type == SCTP_SET_PRIM_ADDR) { 2194 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2195 /* must validate the ifa is in the ep */ 2196 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2197 continue; 2198 } 2199 } else { 2200 /* Need to check scopes for this guy */ 2201 if (sctp_is_address_in_scope(ifa, 2202 stcb->asoc.ipv4_addr_legal, 2203 stcb->asoc.ipv6_addr_legal, 2204 stcb->asoc.loopback_scope, 2205 stcb->asoc.ipv4_local_scope, 2206 stcb->asoc.local_scope, 2207 stcb->asoc.site_scope, 0) == 0) { 2208 continue; 2209 } 2210 } 2211 } 2212 /* queue an asconf for this address add/delete */ 2213 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2214 stcb->asoc.peer_supports_asconf) { 2215 /* queue an asconf for this addr */ 2216 status = sctp_asconf_queue_add(stcb, ifa, type); 2217 /* 2218 * if queued ok, and in the open state, update the 2219 * count of queued params. If in the non-open 2220 * state, these get sent when the assoc goes open. 2221 */ 2222 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2223 if (status >= 0) { 2224 num_queued++; 2225 } 2226 } 2227 } 2228 } 2229 /* 2230 * If we have queued params in the open state, send out an ASCONF. 2231 */ 2232 if (num_queued > 0) { 2233 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2234 } 2235 } 2236 2237 void 2238 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2239 { 2240 struct sctp_asconf_iterator *asc; 2241 struct sctp_ifa *ifa; 2242 struct sctp_laddr *l, *nl; 2243 2244 asc = (struct sctp_asconf_iterator *)ptr; 2245 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2246 ifa = l->ifa; 2247 if (l->action == SCTP_ADD_IP_ADDRESS) { 2248 /* Clear the defer use flag */ 2249 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2250 } 2251 sctp_free_ifa(ifa); 2252 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2253 SCTP_DECR_LADDR_COUNT(); 2254 } 2255 SCTP_FREE(asc, SCTP_M_ASC_IT); 2256 } 2257 2258 /* 2259 * sa is the sockaddr to ask the peer to set primary to. 2260 * returns: 0 = completed, -1 = error 2261 */ 2262 int32_t 2263 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2264 { 2265 uint32_t vrf_id; 2266 struct sctp_ifa *ifa; 2267 2268 /* find the ifa for the desired set primary */ 2269 vrf_id = stcb->asoc.vrf_id; 2270 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2271 if (ifa == NULL) { 2272 /* Invalid address */ 2273 return (-1); 2274 } 2275 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2276 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2277 /* set primary queuing succeeded */ 2278 SCTPDBG(SCTP_DEBUG_ASCONF1, 2279 "set_primary_ip_address_sa: queued on tcb=%p, ", 2280 (void *)stcb); 2281 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2282 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2283 #ifdef SCTP_TIMER_BASED_ASCONF 2284 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2285 stcb->sctp_ep, stcb, 2286 stcb->asoc.primary_destination); 2287 #else 2288 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2289 #endif 2290 } 2291 } else { 2292 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2293 (void *)stcb); 2294 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2295 return (-1); 2296 } 2297 return (0); 2298 } 2299 2300 void 2301 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2302 { 2303 struct sctp_inpcb *inp; 2304 2305 /* go through all our PCB's */ 2306 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2307 struct sctp_tcb *stcb; 2308 2309 /* process for all associations for this endpoint */ 2310 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2311 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2312 if (!sctp_asconf_queue_add(stcb, ifa, 2313 SCTP_SET_PRIM_ADDR)) { 2314 /* set primary queuing succeeded */ 2315 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2316 (void *)stcb); 2317 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2318 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2319 #ifdef SCTP_TIMER_BASED_ASCONF 2320 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2321 stcb->sctp_ep, stcb, 2322 stcb->asoc.primary_destination); 2323 #else 2324 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2325 #endif 2326 } 2327 } 2328 } /* for each stcb */ 2329 } /* for each inp */ 2330 } 2331 2332 int 2333 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2334 { 2335 struct sctp_tmit_chunk *chk, *nchk; 2336 unsigned int offset, asconf_limit; 2337 struct sctp_asconf_chunk *acp; 2338 struct sctp_asconf_paramhdr *aph; 2339 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2340 struct sctp_paramhdr *ph; 2341 int add_cnt, del_cnt; 2342 uint16_t last_param_type; 2343 2344 add_cnt = del_cnt = 0; 2345 last_param_type = 0; 2346 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2347 if (chk->data == NULL) { 2348 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2349 continue; 2350 } 2351 offset = 0; 2352 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2353 offset += sizeof(struct sctp_asconf_chunk); 2354 asconf_limit = ntohs(acp->ch.chunk_length); 2355 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2356 if (ph == NULL) { 2357 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2358 continue; 2359 } 2360 offset += ntohs(ph->param_length); 2361 2362 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2363 if (aph == NULL) { 2364 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2365 continue; 2366 } 2367 while (aph != NULL) { 2368 unsigned int param_length, param_type; 2369 2370 param_type = ntohs(aph->ph.param_type); 2371 param_length = ntohs(aph->ph.param_length); 2372 if (offset + param_length > asconf_limit) { 2373 /* parameter goes beyond end of chunk! */ 2374 break; 2375 } 2376 if (param_length > sizeof(aparam_buf)) { 2377 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2378 break; 2379 } 2380 if (param_length <= sizeof(struct sctp_paramhdr)) { 2381 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2382 break; 2383 } 2384 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2385 if (aph == NULL) { 2386 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2387 break; 2388 } 2389 ph = (struct sctp_paramhdr *)(aph + 1); 2390 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2391 switch (param_type) { 2392 case SCTP_ADD_IP_ADDRESS: 2393 add_cnt++; 2394 break; 2395 case SCTP_DEL_IP_ADDRESS: 2396 del_cnt++; 2397 break; 2398 default: 2399 break; 2400 } 2401 last_param_type = param_type; 2402 } 2403 offset += SCTP_SIZE32(param_length); 2404 if (offset >= asconf_limit) { 2405 /* no more data in the mbuf chain */ 2406 break; 2407 } 2408 /* get pointer to next asconf param */ 2409 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2410 } 2411 } 2412 2413 /* 2414 * we want to find the sequences which consist of ADD -> DEL -> ADD 2415 * or DEL -> ADD 2416 */ 2417 if (add_cnt > del_cnt || 2418 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2419 return (1); 2420 } 2421 return (0); 2422 } 2423 2424 static struct sockaddr * 2425 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2426 { 2427 struct sctp_vrf *vrf = NULL; 2428 struct sctp_ifn *sctp_ifn; 2429 struct sctp_ifa *sctp_ifa; 2430 2431 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2432 SCTP_IPI_ADDR_RLOCK(); 2433 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2434 if (vrf == NULL) { 2435 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2436 SCTP_IPI_ADDR_RUNLOCK(); 2437 return (NULL); 2438 } 2439 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2440 if (stcb->asoc.loopback_scope == 0 && 2441 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2442 /* Skip if loopback_scope not set */ 2443 continue; 2444 } 2445 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2446 switch (sctp_ifa->address.sa.sa_family) { 2447 #ifdef INET 2448 case AF_INET: 2449 if (stcb->asoc.ipv4_addr_legal) { 2450 struct sockaddr_in *sin; 2451 2452 sin = (struct sockaddr_in *)&sctp_ifa->address.sa; 2453 if (sin->sin_addr.s_addr == 0) { 2454 /* skip unspecifed addresses */ 2455 continue; 2456 } 2457 if (stcb->asoc.ipv4_local_scope == 0 && 2458 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2459 continue; 2460 2461 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2462 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2463 continue; 2464 /* 2465 * found a valid local v4 address to 2466 * use 2467 */ 2468 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2469 SCTP_IPI_ADDR_RUNLOCK(); 2470 return (&sctp_ifa->address.sa); 2471 } 2472 break; 2473 #endif 2474 #ifdef INET6 2475 case AF_INET6: 2476 if (stcb->asoc.ipv6_addr_legal) { 2477 struct sockaddr_in6 *sin6; 2478 2479 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2480 continue; 2481 } 2482 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa; 2483 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2484 /* 2485 * we skip unspecifed 2486 * addresses 2487 */ 2488 continue; 2489 } 2490 if (stcb->asoc.local_scope == 0 && 2491 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2492 continue; 2493 if (stcb->asoc.site_scope == 0 && 2494 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2495 continue; 2496 2497 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2498 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2499 continue; 2500 /* 2501 * found a valid local v6 address to 2502 * use 2503 */ 2504 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2505 SCTP_IPI_ADDR_RUNLOCK(); 2506 return (&sctp_ifa->address.sa); 2507 } 2508 break; 2509 #endif 2510 default: 2511 break; 2512 } 2513 } 2514 } 2515 /* no valid addresses found */ 2516 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2517 SCTP_IPI_ADDR_RUNLOCK(); 2518 return (NULL); 2519 } 2520 2521 static struct sockaddr * 2522 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2523 { 2524 struct sctp_laddr *laddr; 2525 2526 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2527 if (laddr->ifa == NULL) { 2528 continue; 2529 } 2530 /* is the address restricted ? */ 2531 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2532 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2533 continue; 2534 2535 /* found a valid local address to use */ 2536 return (&laddr->ifa->address.sa); 2537 } 2538 /* no valid addresses found */ 2539 return (NULL); 2540 } 2541 2542 /* 2543 * builds an ASCONF chunk from queued ASCONF params. 2544 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2545 */ 2546 struct mbuf * 2547 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2548 { 2549 struct mbuf *m_asconf, *m_asconf_chk; 2550 struct sctp_asconf_addr *aa; 2551 struct sctp_asconf_chunk *acp; 2552 struct sctp_asconf_paramhdr *aph; 2553 struct sctp_asconf_addr_param *aap; 2554 uint32_t p_length; 2555 uint32_t correlation_id = 1; /* 0 is reserved... */ 2556 caddr_t ptr, lookup_ptr; 2557 uint8_t lookup_used = 0; 2558 2559 /* are there any asconf params to send? */ 2560 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2561 if (aa->sent == 0) 2562 break; 2563 } 2564 if (aa == NULL) 2565 return (NULL); 2566 2567 /* 2568 * get a chunk header mbuf and a cluster for the asconf params since 2569 * it's simpler to fill in the asconf chunk header lookup address on 2570 * the fly 2571 */ 2572 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA); 2573 if (m_asconf_chk == NULL) { 2574 /* no mbuf's */ 2575 SCTPDBG(SCTP_DEBUG_ASCONF1, 2576 "compose_asconf: couldn't get chunk mbuf!\n"); 2577 return (NULL); 2578 } 2579 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 2580 if (m_asconf == NULL) { 2581 /* no mbuf's */ 2582 SCTPDBG(SCTP_DEBUG_ASCONF1, 2583 "compose_asconf: couldn't get mbuf!\n"); 2584 sctp_m_freem(m_asconf_chk); 2585 return (NULL); 2586 } 2587 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2588 SCTP_BUF_LEN(m_asconf) = 0; 2589 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2590 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2591 /* save pointers to lookup address and asconf params */ 2592 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2593 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2594 2595 /* fill in chunk header info */ 2596 acp->ch.chunk_type = SCTP_ASCONF; 2597 acp->ch.chunk_flags = 0; 2598 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2599 stcb->asoc.asconf_seq_out++; 2600 2601 /* add parameters... up to smallest MTU allowed */ 2602 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2603 if (aa->sent) 2604 continue; 2605 /* get the parameter length */ 2606 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2607 /* will it fit in current chunk? */ 2608 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) { 2609 /* won't fit, so we're done with this chunk */ 2610 break; 2611 } 2612 /* assign (and store) a correlation id */ 2613 aa->ap.aph.correlation_id = correlation_id++; 2614 2615 /* 2616 * fill in address if we're doing a delete this is a simple 2617 * way for us to fill in the correlation address, which 2618 * should only be used by the peer if we're deleting our 2619 * source address and adding a new address (e.g. renumbering 2620 * case) 2621 */ 2622 if (lookup_used == 0 && 2623 (aa->special_del == 0) && 2624 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2625 struct sctp_ipv6addr_param *lookup; 2626 uint16_t p_size, addr_size; 2627 2628 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2629 lookup->ph.param_type = 2630 htons(aa->ap.addrp.ph.param_type); 2631 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2632 /* copy IPv6 address */ 2633 p_size = sizeof(struct sctp_ipv6addr_param); 2634 addr_size = sizeof(struct in6_addr); 2635 } else { 2636 /* copy IPv4 address */ 2637 p_size = sizeof(struct sctp_ipv4addr_param); 2638 addr_size = sizeof(struct in_addr); 2639 } 2640 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2641 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2642 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2643 lookup_used = 1; 2644 } 2645 /* copy into current space */ 2646 memcpy(ptr, &aa->ap, p_length); 2647 2648 /* network elements and update lengths */ 2649 aph = (struct sctp_asconf_paramhdr *)ptr; 2650 aap = (struct sctp_asconf_addr_param *)ptr; 2651 /* correlation_id is transparent to peer, no htonl needed */ 2652 aph->ph.param_type = htons(aph->ph.param_type); 2653 aph->ph.param_length = htons(aph->ph.param_length); 2654 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2655 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2656 2657 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2658 ptr += SCTP_SIZE32(p_length); 2659 2660 /* 2661 * these params are removed off the pending list upon 2662 * getting an ASCONF-ACK back from the peer, just set flag 2663 */ 2664 aa->sent = 1; 2665 } 2666 /* check to see if the lookup addr has been populated yet */ 2667 if (lookup_used == 0) { 2668 /* NOTE: if the address param is optional, can skip this... */ 2669 /* add any valid (existing) address... */ 2670 struct sctp_ipv6addr_param *lookup; 2671 uint16_t p_size, addr_size; 2672 struct sockaddr *found_addr; 2673 caddr_t addr_ptr; 2674 2675 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2676 found_addr = sctp_find_valid_localaddr(stcb, 2677 addr_locked); 2678 else 2679 found_addr = sctp_find_valid_localaddr_ep(stcb); 2680 2681 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2682 if (found_addr != NULL) { 2683 switch (found_addr->sa_family) { 2684 #ifdef INET6 2685 case AF_INET6: 2686 /* copy IPv6 address */ 2687 lookup->ph.param_type = 2688 htons(SCTP_IPV6_ADDRESS); 2689 p_size = sizeof(struct sctp_ipv6addr_param); 2690 addr_size = sizeof(struct in6_addr); 2691 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2692 found_addr)->sin6_addr; 2693 break; 2694 #endif 2695 #ifdef INET 2696 case AF_INET: 2697 /* copy IPv4 address */ 2698 lookup->ph.param_type = 2699 htons(SCTP_IPV4_ADDRESS); 2700 p_size = sizeof(struct sctp_ipv4addr_param); 2701 addr_size = sizeof(struct in_addr); 2702 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2703 found_addr)->sin_addr; 2704 break; 2705 #endif 2706 default: 2707 p_size = 0; 2708 addr_size = 0; 2709 addr_ptr = NULL; 2710 break; 2711 } 2712 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2713 memcpy(lookup->addr, addr_ptr, addr_size); 2714 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2715 } else { 2716 /* uh oh... don't have any address?? */ 2717 SCTPDBG(SCTP_DEBUG_ASCONF1, 2718 "compose_asconf: no lookup addr!\n"); 2719 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2720 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2721 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2722 bzero(lookup->addr, sizeof(struct in_addr)); 2723 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2724 } 2725 } 2726 /* chain it all together */ 2727 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2728 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2729 acp->ch.chunk_length = ntohs(*retlen); 2730 2731 return (m_asconf_chk); 2732 } 2733 2734 /* 2735 * section to handle address changes before an association is up eg. changes 2736 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2737 */ 2738 2739 /* 2740 * processes the (local) addresses in the INIT-ACK chunk 2741 */ 2742 static void 2743 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2744 unsigned int offset, unsigned int length) 2745 { 2746 struct sctp_paramhdr tmp_param, *ph; 2747 uint16_t plen, ptype; 2748 struct sctp_ifa *sctp_ifa; 2749 2750 #ifdef INET6 2751 struct sctp_ipv6addr_param addr6_store; 2752 struct sockaddr_in6 sin6; 2753 2754 #endif 2755 #ifdef INET 2756 struct sctp_ipv4addr_param addr4_store; 2757 struct sockaddr_in sin; 2758 2759 #endif 2760 struct sockaddr *sa; 2761 uint32_t vrf_id; 2762 2763 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2764 if (stcb == NULL) /* Un-needed check for SA */ 2765 return; 2766 2767 /* convert to upper bound */ 2768 length += offset; 2769 2770 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2771 return; 2772 } 2773 /* init the addresses */ 2774 #ifdef INET6 2775 bzero(&sin6, sizeof(sin6)); 2776 sin6.sin6_family = AF_INET6; 2777 sin6.sin6_len = sizeof(sin6); 2778 sin6.sin6_port = stcb->rport; 2779 #endif 2780 2781 #ifdef INET 2782 bzero(&sin, sizeof(sin)); 2783 sin.sin_family = AF_INET; 2784 sin.sin_len = sizeof(sin); 2785 sin.sin_port = stcb->rport; 2786 #endif 2787 2788 /* go through the addresses in the init-ack */ 2789 ph = (struct sctp_paramhdr *) 2790 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2791 (uint8_t *) & tmp_param); 2792 while (ph != NULL) { 2793 ptype = ntohs(ph->param_type); 2794 plen = ntohs(ph->param_length); 2795 switch (ptype) { 2796 #ifdef INET6 2797 case SCTP_IPV6_ADDRESS: 2798 { 2799 struct sctp_ipv6addr_param *a6p; 2800 2801 /* get the entire IPv6 address param */ 2802 a6p = (struct sctp_ipv6addr_param *) 2803 sctp_m_getptr(m, offset, 2804 sizeof(struct sctp_ipv6addr_param), 2805 (uint8_t *) & addr6_store); 2806 if (plen != sizeof(struct sctp_ipv6addr_param) || 2807 a6p == NULL) { 2808 return; 2809 } 2810 memcpy(&sin6.sin6_addr, a6p->addr, 2811 sizeof(struct in6_addr)); 2812 sa = (struct sockaddr *)&sin6; 2813 break; 2814 } 2815 #endif 2816 #ifdef INET 2817 case SCTP_IPV4_ADDRESS: 2818 { 2819 struct sctp_ipv4addr_param *a4p; 2820 2821 /* get the entire IPv4 address param */ 2822 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2823 sizeof(struct sctp_ipv4addr_param), 2824 (uint8_t *) & addr4_store); 2825 if (plen != sizeof(struct sctp_ipv4addr_param) || 2826 a4p == NULL) { 2827 return; 2828 } 2829 sin.sin_addr.s_addr = a4p->addr; 2830 sa = (struct sockaddr *)&sin; 2831 break; 2832 } 2833 #endif 2834 default: 2835 goto next_addr; 2836 } 2837 2838 /* see if this address really (still) exists */ 2839 if (stcb) { 2840 vrf_id = stcb->asoc.vrf_id; 2841 } else { 2842 vrf_id = SCTP_DEFAULT_VRFID; 2843 } 2844 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id, 2845 SCTP_ADDR_NOT_LOCKED); 2846 if (sctp_ifa == NULL) { 2847 /* address doesn't exist anymore */ 2848 int status; 2849 2850 /* are ASCONFs allowed ? */ 2851 if ((sctp_is_feature_on(stcb->sctp_ep, 2852 SCTP_PCB_FLAGS_DO_ASCONF)) && 2853 stcb->asoc.peer_supports_asconf) { 2854 /* queue an ASCONF DEL_IP_ADDRESS */ 2855 status = sctp_asconf_queue_sa_delete(stcb, sa); 2856 /* 2857 * if queued ok, and in correct state, send 2858 * out the ASCONF. 2859 */ 2860 if (status == 0 && 2861 SCTP_GET_STATE(&stcb->asoc) == 2862 SCTP_STATE_OPEN) { 2863 #ifdef SCTP_TIMER_BASED_ASCONF 2864 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2865 stcb->sctp_ep, stcb, 2866 stcb->asoc.primary_destination); 2867 #else 2868 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2869 #endif 2870 } 2871 } 2872 } 2873 next_addr: 2874 /* 2875 * Sanity check: Make sure the length isn't 0, otherwise 2876 * we'll be stuck in this loop for a long time... 2877 */ 2878 if (SCTP_SIZE32(plen) == 0) { 2879 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2880 plen, ptype); 2881 return; 2882 } 2883 /* get next parameter */ 2884 offset += SCTP_SIZE32(plen); 2885 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2886 return; 2887 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2888 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2889 } /* while */ 2890 } 2891 2892 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2893 /* 2894 * checks to see if a specific address is in the initack address list returns 2895 * 1 if found, 0 if not 2896 */ 2897 static uint32_t 2898 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2899 { 2900 struct sctp_paramhdr tmp_param, *ph; 2901 uint16_t plen, ptype; 2902 2903 #ifdef INET 2904 struct sockaddr_in *sin; 2905 struct sctp_ipv4addr_param *a4p; 2906 struct sctp_ipv6addr_param addr4_store; 2907 2908 #endif 2909 #ifdef INET6 2910 struct sockaddr_in6 *sin6; 2911 struct sctp_ipv6addr_param *a6p; 2912 struct sctp_ipv6addr_param addr6_store; 2913 struct sockaddr_in6 sin6_tmp; 2914 2915 #endif 2916 2917 switch (sa->sa_family) { 2918 #ifdef INET 2919 case AF_INET: 2920 break; 2921 #endif 2922 #ifdef INET6 2923 case AF_INET6: 2924 break; 2925 #endif 2926 default: 2927 return (0); 2928 } 2929 2930 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2931 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2932 /* convert to upper bound */ 2933 length += offset; 2934 2935 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2936 SCTPDBG(SCTP_DEBUG_ASCONF1, 2937 "find_initack_addr: invalid offset?\n"); 2938 return (0); 2939 } 2940 /* go through the addresses in the init-ack */ 2941 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2942 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2943 while (ph != NULL) { 2944 ptype = ntohs(ph->param_type); 2945 plen = ntohs(ph->param_length); 2946 switch (ptype) { 2947 #ifdef INET6 2948 case SCTP_IPV6_ADDRESS: 2949 if (sa->sa_family == AF_INET6) { 2950 /* get the entire IPv6 address param */ 2951 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2952 break; 2953 } 2954 /* get the entire IPv6 address param */ 2955 a6p = (struct sctp_ipv6addr_param *) 2956 sctp_m_getptr(m, offset, 2957 sizeof(struct sctp_ipv6addr_param), 2958 (uint8_t *) & addr6_store); 2959 if (a6p == NULL) { 2960 return (0); 2961 } 2962 sin6 = (struct sockaddr_in6 *)sa; 2963 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2964 /* create a copy and clear scope */ 2965 memcpy(&sin6_tmp, sin6, 2966 sizeof(struct sockaddr_in6)); 2967 sin6 = &sin6_tmp; 2968 in6_clearscope(&sin6->sin6_addr); 2969 } 2970 if (memcmp(&sin6->sin6_addr, a6p->addr, 2971 sizeof(struct in6_addr)) == 0) { 2972 /* found it */ 2973 return (1); 2974 } 2975 } 2976 break; 2977 #endif /* INET6 */ 2978 #ifdef INET 2979 case SCTP_IPV4_ADDRESS: 2980 if (sa->sa_family == AF_INET) { 2981 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2982 break; 2983 } 2984 /* get the entire IPv4 address param */ 2985 a4p = (struct sctp_ipv4addr_param *) 2986 sctp_m_getptr(m, offset, 2987 sizeof(struct sctp_ipv4addr_param), 2988 (uint8_t *) & addr4_store); 2989 if (a4p == NULL) { 2990 return (0); 2991 } 2992 sin = (struct sockaddr_in *)sa; 2993 if (sin->sin_addr.s_addr == a4p->addr) { 2994 /* found it */ 2995 return (1); 2996 } 2997 } 2998 break; 2999 #endif 3000 default: 3001 break; 3002 } 3003 /* get next parameter */ 3004 offset += SCTP_SIZE32(plen); 3005 if (offset + sizeof(struct sctp_paramhdr) > length) { 3006 return (0); 3007 } 3008 ph = (struct sctp_paramhdr *) 3009 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3010 (uint8_t *) & tmp_param); 3011 } /* while */ 3012 /* not found! */ 3013 return (0); 3014 } 3015 3016 /* 3017 * makes sure that the current endpoint local addr list is consistent with 3018 * the new association (eg. subset bound, asconf allowed) adds addresses as 3019 * necessary 3020 */ 3021 static void 3022 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3023 int length, struct sockaddr *init_addr) 3024 { 3025 struct sctp_laddr *laddr; 3026 3027 /* go through the endpoint list */ 3028 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3029 /* be paranoid and validate the laddr */ 3030 if (laddr->ifa == NULL) { 3031 SCTPDBG(SCTP_DEBUG_ASCONF1, 3032 "check_addr_list_ep: laddr->ifa is NULL"); 3033 continue; 3034 } 3035 if (laddr->ifa == NULL) { 3036 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3037 continue; 3038 } 3039 /* do i have it implicitly? */ 3040 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3041 continue; 3042 } 3043 /* check to see if in the init-ack */ 3044 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3045 /* try to add it */ 3046 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3047 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3048 } 3049 } 3050 } 3051 3052 /* 3053 * makes sure that the current kernel address list is consistent with the new 3054 * association (with all addrs bound) adds addresses as necessary 3055 */ 3056 static void 3057 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3058 int length, struct sockaddr *init_addr, 3059 uint16_t local_scope, uint16_t site_scope, 3060 uint16_t ipv4_scope, uint16_t loopback_scope) 3061 { 3062 struct sctp_vrf *vrf = NULL; 3063 struct sctp_ifn *sctp_ifn; 3064 struct sctp_ifa *sctp_ifa; 3065 uint32_t vrf_id; 3066 3067 #ifdef INET 3068 struct sockaddr_in *sin; 3069 3070 #endif 3071 #ifdef INET6 3072 struct sockaddr_in6 *sin6; 3073 3074 #endif 3075 3076 if (stcb) { 3077 vrf_id = stcb->asoc.vrf_id; 3078 } else { 3079 return; 3080 } 3081 SCTP_IPI_ADDR_RLOCK(); 3082 vrf = sctp_find_vrf(vrf_id); 3083 if (vrf == NULL) { 3084 SCTP_IPI_ADDR_RUNLOCK(); 3085 return; 3086 } 3087 /* go through all our known interfaces */ 3088 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3089 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3090 /* skip loopback interface */ 3091 continue; 3092 } 3093 /* go through each interface address */ 3094 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3095 /* do i have it implicitly? */ 3096 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3097 continue; 3098 } 3099 switch (sctp_ifa->address.sa.sa_family) { 3100 #ifdef INET 3101 case AF_INET: 3102 sin = (struct sockaddr_in *)&sctp_ifa->address.sin; 3103 if ((ipv4_scope == 0) && 3104 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3105 /* private address not in scope */ 3106 continue; 3107 } 3108 break; 3109 #endif 3110 #ifdef INET6 3111 case AF_INET6: 3112 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sin6; 3113 if ((local_scope == 0) && 3114 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3115 continue; 3116 } 3117 if ((site_scope == 0) && 3118 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3119 continue; 3120 } 3121 break; 3122 #endif 3123 default: 3124 break; 3125 } 3126 /* check to see if in the init-ack */ 3127 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3128 /* try to add it */ 3129 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3130 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3131 SCTP_ADDR_LOCKED); 3132 } 3133 } /* end foreach ifa */ 3134 } /* end foreach ifn */ 3135 SCTP_IPI_ADDR_RUNLOCK(); 3136 } 3137 3138 /* 3139 * validates an init-ack chunk (from a cookie-echo) with current addresses 3140 * adds addresses from the init-ack into our local address list, if needed 3141 * queues asconf adds/deletes addresses as needed and makes appropriate list 3142 * changes for source address selection m, offset: points to the start of the 3143 * address list in an init-ack chunk length: total length of the address 3144 * params only init_addr: address where my INIT-ACK was sent from 3145 */ 3146 void 3147 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3148 int length, struct sockaddr *init_addr, 3149 uint16_t local_scope, uint16_t site_scope, 3150 uint16_t ipv4_scope, uint16_t loopback_scope) 3151 { 3152 /* process the local addresses in the initack */ 3153 sctp_process_initack_addresses(stcb, m, offset, length); 3154 3155 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3156 /* bound all case */ 3157 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3158 local_scope, site_scope, ipv4_scope, loopback_scope); 3159 } else { 3160 /* subset bound case */ 3161 if (sctp_is_feature_on(stcb->sctp_ep, 3162 SCTP_PCB_FLAGS_DO_ASCONF)) { 3163 /* asconf's allowed */ 3164 sctp_check_address_list_ep(stcb, m, offset, length, 3165 init_addr); 3166 } 3167 /* else, no asconfs allowed, so what we sent is what we get */ 3168 } 3169 } 3170 3171 /* 3172 * sctp_bindx() support 3173 */ 3174 uint32_t 3175 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3176 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3177 { 3178 struct sctp_ifa *ifa; 3179 struct sctp_laddr *laddr, *nladdr; 3180 3181 if (sa->sa_len == 0) { 3182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3183 return (EINVAL); 3184 } 3185 if (sctp_ifap) { 3186 ifa = sctp_ifap; 3187 } else if (type == SCTP_ADD_IP_ADDRESS) { 3188 /* For an add the address MUST be on the system */ 3189 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3190 } else if (type == SCTP_DEL_IP_ADDRESS) { 3191 /* For a delete we need to find it in the inp */ 3192 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3193 } else { 3194 ifa = NULL; 3195 } 3196 if (ifa != NULL) { 3197 if (type == SCTP_ADD_IP_ADDRESS) { 3198 sctp_add_local_addr_ep(inp, ifa, type); 3199 } else if (type == SCTP_DEL_IP_ADDRESS) { 3200 if (inp->laddr_count < 2) { 3201 /* can't delete the last local address */ 3202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3203 return (EINVAL); 3204 } 3205 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3206 sctp_nxt_addr) { 3207 if (ifa == laddr->ifa) { 3208 /* Mark in the delete */ 3209 laddr->action = type; 3210 } 3211 } 3212 } 3213 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3214 /* 3215 * There is no need to start the iterator if the inp 3216 * has no associations. 3217 */ 3218 if (type == SCTP_DEL_IP_ADDRESS) { 3219 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3220 if (laddr->ifa == ifa) { 3221 sctp_del_local_addr_ep(inp, ifa); 3222 } 3223 } 3224 } 3225 } else { 3226 struct sctp_asconf_iterator *asc; 3227 struct sctp_laddr *wi; 3228 3229 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3230 sizeof(struct sctp_asconf_iterator), 3231 SCTP_M_ASC_IT); 3232 if (asc == NULL) { 3233 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3234 return (ENOMEM); 3235 } 3236 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3237 if (wi == NULL) { 3238 SCTP_FREE(asc, SCTP_M_ASC_IT); 3239 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3240 return (ENOMEM); 3241 } 3242 LIST_INIT(&asc->list_of_work); 3243 asc->cnt = 1; 3244 SCTP_INCR_LADDR_COUNT(); 3245 wi->ifa = ifa; 3246 wi->action = type; 3247 atomic_add_int(&ifa->refcount, 1); 3248 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3249 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3250 sctp_asconf_iterator_stcb, 3251 sctp_asconf_iterator_ep_end, 3252 SCTP_PCB_ANY_FLAGS, 3253 SCTP_PCB_ANY_FEATURES, 3254 SCTP_ASOC_ANY_STATE, 3255 (void *)asc, 0, 3256 sctp_asconf_iterator_end, inp, 0); 3257 } 3258 return (0); 3259 } else { 3260 /* invalid address! */ 3261 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3262 return (EADDRNOTAVAIL); 3263 } 3264 } 3265 3266 void 3267 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3268 struct sctp_nets *net) 3269 { 3270 struct sctp_asconf_addr *aa; 3271 struct sctp_ifa *sctp_ifap; 3272 struct sctp_asconf_tag_param *vtag; 3273 3274 #ifdef INET 3275 struct sockaddr_in *to; 3276 3277 #endif 3278 #ifdef INET6 3279 struct sockaddr_in6 *to6; 3280 3281 #endif 3282 if (net == NULL) { 3283 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3284 return; 3285 } 3286 if (stcb == NULL) { 3287 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3288 return; 3289 } 3290 /* 3291 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3292 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3293 */ 3294 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3295 SCTP_M_ASC_ADDR); 3296 if (aa == NULL) { 3297 /* didn't get memory */ 3298 SCTPDBG(SCTP_DEBUG_ASCONF1, 3299 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3300 return; 3301 } 3302 aa->special_del = 0; 3303 /* fill in asconf address parameter fields */ 3304 /* top level elements are "networked" during send */ 3305 aa->ifa = NULL; 3306 aa->sent = 0; /* clear sent flag */ 3307 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3308 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3309 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3310 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3311 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3312 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3313 3314 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3315 SCTP_M_ASC_ADDR); 3316 if (aa == NULL) { 3317 /* didn't get memory */ 3318 SCTPDBG(SCTP_DEBUG_ASCONF1, 3319 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3320 return; 3321 } 3322 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3323 /* fill in asconf address parameter fields */ 3324 /* ADD(0.0.0.0) */ 3325 switch (net->ro._l_addr.sa.sa_family) { 3326 #ifdef INET 3327 case AF_INET: 3328 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3329 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3330 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3331 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3332 /* No need to add an address, we are using 0.0.0.0 */ 3333 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3334 break; 3335 #endif 3336 #ifdef INET6 3337 case AF_INET6: 3338 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3339 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3340 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3341 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3342 /* No need to add an address, we are using 0.0.0.0 */ 3343 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3344 break; 3345 #endif 3346 } 3347 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3348 SCTP_M_ASC_ADDR); 3349 if (aa == NULL) { 3350 /* didn't get memory */ 3351 SCTPDBG(SCTP_DEBUG_ASCONF1, 3352 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3353 return; 3354 } 3355 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3356 /* fill in asconf address parameter fields */ 3357 /* ADD(0.0.0.0) */ 3358 switch (net->ro._l_addr.sa.sa_family) { 3359 #ifdef INET 3360 case AF_INET: 3361 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3362 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3363 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3364 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3365 /* No need to add an address, we are using 0.0.0.0 */ 3366 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3367 break; 3368 #endif 3369 #ifdef INET6 3370 case AF_INET6: 3371 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3372 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3373 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3374 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3375 /* No need to add an address, we are using 0.0.0.0 */ 3376 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3377 break; 3378 #endif 3379 } 3380 /* Now we must hunt the addresses and add all global addresses */ 3381 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3382 struct sctp_vrf *vrf = NULL; 3383 struct sctp_ifn *sctp_ifnp; 3384 uint32_t vrf_id; 3385 3386 vrf_id = stcb->sctp_ep->def_vrf_id; 3387 vrf = sctp_find_vrf(vrf_id); 3388 if (vrf == NULL) { 3389 goto skip_rest; 3390 } 3391 SCTP_IPI_ADDR_RLOCK(); 3392 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3393 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3394 switch (sctp_ifap->address.sa.sa_family) { 3395 #ifdef INET 3396 case AF_INET: 3397 to = &sctp_ifap->address.sin; 3398 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3399 continue; 3400 } 3401 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3402 continue; 3403 } 3404 break; 3405 #endif 3406 #ifdef INET6 3407 case AF_INET6: 3408 to6 = &sctp_ifap->address.sin6; 3409 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3410 continue; 3411 } 3412 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3413 continue; 3414 } 3415 break; 3416 #endif 3417 default: 3418 continue; 3419 } 3420 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3421 } 3422 } 3423 SCTP_IPI_ADDR_RUNLOCK(); 3424 } else { 3425 struct sctp_laddr *laddr; 3426 3427 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3428 if (laddr->ifa == NULL) { 3429 continue; 3430 } 3431 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3432 /* 3433 * Address being deleted by the system, dont 3434 * list. 3435 */ 3436 continue; 3437 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3438 /* 3439 * Address being deleted on this ep don't 3440 * list. 3441 */ 3442 continue; 3443 } 3444 sctp_ifap = laddr->ifa; 3445 switch (sctp_ifap->address.sa.sa_family) { 3446 #ifdef INET 3447 case AF_INET: 3448 to = &sctp_ifap->address.sin; 3449 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3450 continue; 3451 } 3452 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3453 continue; 3454 } 3455 break; 3456 #endif 3457 #ifdef INET6 3458 case AF_INET6: 3459 to6 = &sctp_ifap->address.sin6; 3460 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3461 continue; 3462 } 3463 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3464 continue; 3465 } 3466 break; 3467 #endif 3468 default: 3469 continue; 3470 } 3471 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3472 } 3473 } 3474 skip_rest: 3475 /* Now we must send the asconf into the queue */ 3476 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3477 } 3478