1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <netinet/sctp_var.h> 38 #include <netinet/sctp_sysctl.h> 39 #include <netinet/sctp_pcb.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp_output.h> 43 #include <netinet/sctp_asconf.h> 44 #include <netinet/sctp_timer.h> 45 46 /* 47 * debug flags: 48 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 49 * SCTP_DEBUG_ASCONF2: detailed info 50 */ 51 52 53 /* 54 * RFC 5061 55 * 56 * An ASCONF parameter queue exists per asoc which holds the pending address 57 * operations. Lists are updated upon receipt of ASCONF-ACK. 58 * 59 * A restricted_addrs list exists per assoc to hold local addresses that are 60 * not (yet) usable by the assoc as a source address. These addresses are 61 * either pending an ASCONF operation (and exist on the ASCONF parameter 62 * queue), or they are permanently restricted (the peer has returned an 63 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 64 * 65 * Deleted addresses are always immediately removed from the lists as they will 66 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 67 * only if allowed. 68 */ 69 70 /* 71 * ASCONF parameter processing. 72 * response_required: set if a reply is required (eg. SUCCESS_REPORT). 73 * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 74 * FIX: allocating this many mbufs on the fly is pretty inefficient... 75 */ 76 static struct mbuf * 77 sctp_asconf_success_response(uint32_t id) 78 { 79 struct mbuf *m_reply = NULL; 80 struct sctp_asconf_paramhdr *aph; 81 82 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 83 0, M_NOWAIT, 1, MT_DATA); 84 if (m_reply == NULL) { 85 SCTPDBG(SCTP_DEBUG_ASCONF1, 86 "asconf_success_response: couldn't get mbuf!\n"); 87 return (NULL); 88 } 89 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 90 aph->correlation_id = id; 91 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 92 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 93 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 94 aph->ph.param_length = htons(aph->ph.param_length); 95 96 return (m_reply); 97 } 98 99 static struct mbuf * 100 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv, 101 uint16_t tlv_length) 102 { 103 struct mbuf *m_reply = NULL; 104 struct sctp_asconf_paramhdr *aph; 105 struct sctp_error_cause *error; 106 uint8_t *tlv; 107 108 m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) + 109 tlv_length + 110 sizeof(struct sctp_error_cause)), 111 0, M_NOWAIT, 1, MT_DATA); 112 if (m_reply == NULL) { 113 SCTPDBG(SCTP_DEBUG_ASCONF1, 114 "asconf_error_response: couldn't get mbuf!\n"); 115 return (NULL); 116 } 117 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 118 error = (struct sctp_error_cause *)(aph + 1); 119 120 aph->correlation_id = id; 121 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 122 error->code = htons(cause); 123 error->length = tlv_length + sizeof(struct sctp_error_cause); 124 aph->ph.param_length = error->length + 125 sizeof(struct sctp_asconf_paramhdr); 126 127 if (aph->ph.param_length > MLEN) { 128 SCTPDBG(SCTP_DEBUG_ASCONF1, 129 "asconf_error_response: tlv_length (%xh) too big\n", 130 tlv_length); 131 sctp_m_freem(m_reply); /* discard */ 132 return (NULL); 133 } 134 if (error_tlv != NULL) { 135 tlv = (uint8_t *) (error + 1); 136 memcpy(tlv, error_tlv, tlv_length); 137 } 138 SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 139 error->length = htons(error->length); 140 aph->ph.param_length = htons(aph->ph.param_length); 141 142 return (m_reply); 143 } 144 145 static struct mbuf * 146 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, 147 struct sctp_tcb *stcb, int send_hb, int response_required) 148 { 149 struct sctp_nets *net; 150 struct mbuf *m_reply = NULL; 151 struct sockaddr_storage sa_store; 152 struct sctp_paramhdr *ph; 153 uint16_t param_type, param_length, aparam_length; 154 struct sockaddr *sa; 155 int zero_address = 0; 156 int bad_address = 0; 157 158 #ifdef INET 159 struct sockaddr_in *sin; 160 struct sctp_ipv4addr_param *v4addr; 161 162 #endif 163 #ifdef INET6 164 struct sockaddr_in6 *sin6; 165 struct sctp_ipv6addr_param *v6addr; 166 167 #endif 168 169 aparam_length = ntohs(aph->ph.param_length); 170 ph = (struct sctp_paramhdr *)(aph + 1); 171 param_type = ntohs(ph->param_type); 172 param_length = ntohs(ph->param_length); 173 174 sa = (struct sockaddr *)&sa_store; 175 switch (param_type) { 176 #ifdef INET 177 case SCTP_IPV4_ADDRESS: 178 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 179 /* invalid param size */ 180 return (NULL); 181 } 182 v4addr = (struct sctp_ipv4addr_param *)ph; 183 sin = (struct sockaddr_in *)&sa_store; 184 bzero(sin, sizeof(*sin)); 185 sin->sin_family = AF_INET; 186 sin->sin_len = sizeof(struct sockaddr_in); 187 sin->sin_port = stcb->rport; 188 sin->sin_addr.s_addr = v4addr->addr; 189 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 190 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 191 bad_address = 1; 192 } 193 if (sin->sin_addr.s_addr == INADDR_ANY) 194 zero_address = 1; 195 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 196 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 197 break; 198 #endif 199 #ifdef INET6 200 case SCTP_IPV6_ADDRESS: 201 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 202 /* invalid param size */ 203 return (NULL); 204 } 205 v6addr = (struct sctp_ipv6addr_param *)ph; 206 sin6 = (struct sockaddr_in6 *)&sa_store; 207 bzero(sin6, sizeof(*sin6)); 208 sin6->sin6_family = AF_INET6; 209 sin6->sin6_len = sizeof(struct sockaddr_in6); 210 sin6->sin6_port = stcb->rport; 211 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 212 sizeof(struct in6_addr)); 213 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 214 bad_address = 1; 215 } 216 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 217 zero_address = 1; 218 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 219 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 220 break; 221 #endif 222 default: 223 m_reply = sctp_asconf_error_response(aph->correlation_id, 224 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 225 aparam_length); 226 return (m_reply); 227 } /* end switch */ 228 229 /* if 0.0.0.0/::0, add the source address instead */ 230 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 231 sa = src; 232 SCTPDBG(SCTP_DEBUG_ASCONF1, 233 "process_asconf_add_ip: using source addr "); 234 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 235 } 236 /* add the address */ 237 if (bad_address) { 238 m_reply = sctp_asconf_error_response(aph->correlation_id, 239 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 240 aparam_length); 241 } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE, 242 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 243 SCTPDBG(SCTP_DEBUG_ASCONF1, 244 "process_asconf_add_ip: error adding address\n"); 245 m_reply = sctp_asconf_error_response(aph->correlation_id, 246 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph, 247 aparam_length); 248 } else { 249 /* notify upper layer */ 250 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 251 if (response_required) { 252 m_reply = 253 sctp_asconf_success_response(aph->correlation_id); 254 } 255 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 256 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 257 stcb, net); 258 if (send_hb) { 259 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 260 } 261 } 262 return (m_reply); 263 } 264 265 static int 266 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 267 { 268 struct sctp_nets *src_net, *net; 269 270 /* make sure the source address exists as a destination net */ 271 src_net = sctp_findnet(stcb, src); 272 if (src_net == NULL) { 273 /* not found */ 274 return (-1); 275 } 276 /* delete all destination addresses except the source */ 277 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 278 if (net != src_net) { 279 /* delete this address */ 280 sctp_remove_net(stcb, net); 281 SCTPDBG(SCTP_DEBUG_ASCONF1, 282 "asconf_del_remote_addrs_except: deleting "); 283 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 284 (struct sockaddr *)&net->ro._l_addr); 285 /* notify upper layer */ 286 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 287 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 288 } 289 } 290 return (0); 291 } 292 293 static struct mbuf * 294 sctp_process_asconf_delete_ip(struct sockaddr *src, 295 struct sctp_asconf_paramhdr *aph, 296 struct sctp_tcb *stcb, int response_required) 297 { 298 struct mbuf *m_reply = NULL; 299 struct sockaddr_storage sa_store; 300 struct sctp_paramhdr *ph; 301 uint16_t param_type, param_length, aparam_length; 302 struct sockaddr *sa; 303 int zero_address = 0; 304 int result; 305 306 #ifdef INET 307 struct sockaddr_in *sin; 308 struct sctp_ipv4addr_param *v4addr; 309 310 #endif 311 #ifdef INET6 312 struct sockaddr_in6 *sin6; 313 struct sctp_ipv6addr_param *v6addr; 314 315 #endif 316 317 aparam_length = ntohs(aph->ph.param_length); 318 ph = (struct sctp_paramhdr *)(aph + 1); 319 param_type = ntohs(ph->param_type); 320 param_length = ntohs(ph->param_length); 321 322 sa = (struct sockaddr *)&sa_store; 323 switch (param_type) { 324 #ifdef INET 325 case SCTP_IPV4_ADDRESS: 326 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 327 /* invalid param size */ 328 return (NULL); 329 } 330 v4addr = (struct sctp_ipv4addr_param *)ph; 331 sin = (struct sockaddr_in *)&sa_store; 332 bzero(sin, sizeof(*sin)); 333 sin->sin_family = AF_INET; 334 sin->sin_len = sizeof(struct sockaddr_in); 335 sin->sin_port = stcb->rport; 336 sin->sin_addr.s_addr = v4addr->addr; 337 if (sin->sin_addr.s_addr == INADDR_ANY) 338 zero_address = 1; 339 SCTPDBG(SCTP_DEBUG_ASCONF1, 340 "process_asconf_delete_ip: deleting "); 341 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 342 break; 343 #endif 344 #ifdef INET6 345 case SCTP_IPV6_ADDRESS: 346 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 347 /* invalid param size */ 348 return (NULL); 349 } 350 v6addr = (struct sctp_ipv6addr_param *)ph; 351 sin6 = (struct sockaddr_in6 *)&sa_store; 352 bzero(sin6, sizeof(*sin6)); 353 sin6->sin6_family = AF_INET6; 354 sin6->sin6_len = sizeof(struct sockaddr_in6); 355 sin6->sin6_port = stcb->rport; 356 memcpy(&sin6->sin6_addr, v6addr->addr, 357 sizeof(struct in6_addr)); 358 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 359 zero_address = 1; 360 SCTPDBG(SCTP_DEBUG_ASCONF1, 361 "process_asconf_delete_ip: deleting "); 362 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 363 break; 364 #endif 365 default: 366 m_reply = sctp_asconf_error_response(aph->correlation_id, 367 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 368 aparam_length); 369 return (m_reply); 370 } 371 372 /* make sure the source address is not being deleted */ 373 if (sctp_cmpaddr(sa, src)) { 374 /* trying to delete the source address! */ 375 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 376 m_reply = sctp_asconf_error_response(aph->correlation_id, 377 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, 378 aparam_length); 379 return (m_reply); 380 } 381 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 382 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 383 result = sctp_asconf_del_remote_addrs_except(stcb, src); 384 385 if (result) { 386 /* src address did not exist? */ 387 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 388 /* what error to reply with?? */ 389 m_reply = 390 sctp_asconf_error_response(aph->correlation_id, 391 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, 392 aparam_length); 393 } else if (response_required) { 394 m_reply = 395 sctp_asconf_success_response(aph->correlation_id); 396 } 397 return (m_reply); 398 } 399 /* delete the address */ 400 result = sctp_del_remote_addr(stcb, sa); 401 /* 402 * note if result == -2, the address doesn't exist in the asoc but 403 * since it's being deleted anyways, we just ack the delete -- but 404 * this probably means something has already gone awry 405 */ 406 if (result == -1) { 407 /* only one address in the asoc */ 408 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 409 m_reply = sctp_asconf_error_response(aph->correlation_id, 410 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, 411 aparam_length); 412 } else { 413 if (response_required) { 414 m_reply = sctp_asconf_success_response(aph->correlation_id); 415 } 416 /* notify upper layer */ 417 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 418 } 419 return (m_reply); 420 } 421 422 static struct mbuf * 423 sctp_process_asconf_set_primary(struct sockaddr *src, 424 struct sctp_asconf_paramhdr *aph, 425 struct sctp_tcb *stcb, int response_required) 426 { 427 struct mbuf *m_reply = NULL; 428 struct sockaddr_storage sa_store; 429 struct sctp_paramhdr *ph; 430 uint16_t param_type, param_length, aparam_length; 431 struct sockaddr *sa; 432 int zero_address = 0; 433 434 #ifdef INET 435 struct sockaddr_in *sin; 436 struct sctp_ipv4addr_param *v4addr; 437 438 #endif 439 #ifdef INET6 440 struct sockaddr_in6 *sin6; 441 struct sctp_ipv6addr_param *v6addr; 442 443 #endif 444 445 aparam_length = ntohs(aph->ph.param_length); 446 ph = (struct sctp_paramhdr *)(aph + 1); 447 param_type = ntohs(ph->param_type); 448 param_length = ntohs(ph->param_length); 449 450 sa = (struct sockaddr *)&sa_store; 451 switch (param_type) { 452 #ifdef INET 453 case SCTP_IPV4_ADDRESS: 454 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 455 /* invalid param size */ 456 return (NULL); 457 } 458 v4addr = (struct sctp_ipv4addr_param *)ph; 459 sin = (struct sockaddr_in *)&sa_store; 460 bzero(sin, sizeof(*sin)); 461 sin->sin_family = AF_INET; 462 sin->sin_len = sizeof(struct sockaddr_in); 463 sin->sin_addr.s_addr = v4addr->addr; 464 if (sin->sin_addr.s_addr == INADDR_ANY) 465 zero_address = 1; 466 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 467 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 468 break; 469 #endif 470 #ifdef INET6 471 case SCTP_IPV6_ADDRESS: 472 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 473 /* invalid param size */ 474 return (NULL); 475 } 476 v6addr = (struct sctp_ipv6addr_param *)ph; 477 sin6 = (struct sockaddr_in6 *)&sa_store; 478 bzero(sin6, sizeof(*sin6)); 479 sin6->sin6_family = AF_INET6; 480 sin6->sin6_len = sizeof(struct sockaddr_in6); 481 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 482 sizeof(struct in6_addr)); 483 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 484 zero_address = 1; 485 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 486 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 487 break; 488 #endif 489 default: 490 m_reply = sctp_asconf_error_response(aph->correlation_id, 491 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 492 aparam_length); 493 return (m_reply); 494 } 495 496 /* if 0.0.0.0/::0, use the source address instead */ 497 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 498 sa = src; 499 SCTPDBG(SCTP_DEBUG_ASCONF1, 500 "process_asconf_set_primary: using source addr "); 501 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 502 } 503 /* set the primary address */ 504 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 505 SCTPDBG(SCTP_DEBUG_ASCONF1, 506 "process_asconf_set_primary: primary address set\n"); 507 /* notify upper layer */ 508 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 509 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 510 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 511 (stcb->asoc.alternate)) { 512 sctp_free_remote_addr(stcb->asoc.alternate); 513 stcb->asoc.alternate = NULL; 514 } 515 if (response_required) { 516 m_reply = sctp_asconf_success_response(aph->correlation_id); 517 } 518 /* 519 * Mobility adaptation. Ideally, when the reception of SET 520 * PRIMARY with DELETE IP ADDRESS of the previous primary 521 * destination, unacknowledged DATA are retransmitted 522 * immediately to the new primary destination for seamless 523 * handover. If the destination is UNCONFIRMED and marked to 524 * REQ_PRIM, The retransmission occur when reception of the 525 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 526 * sctp_input.c) Also, when change of the primary 527 * destination, it is better that all subsequent new DATA 528 * containing already queued DATA are transmitted to the new 529 * primary destination. (by micchie) 530 */ 531 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 532 SCTP_MOBILITY_BASE) || 533 sctp_is_mobility_feature_on(stcb->sctp_ep, 534 SCTP_MOBILITY_FASTHANDOFF)) && 535 sctp_is_mobility_feature_on(stcb->sctp_ep, 536 SCTP_MOBILITY_PRIM_DELETED) && 537 (stcb->asoc.primary_destination->dest_state & 538 SCTP_ADDR_UNCONFIRMED) == 0) { 539 540 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7); 541 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 542 SCTP_MOBILITY_FASTHANDOFF)) { 543 sctp_assoc_immediate_retrans(stcb, 544 stcb->asoc.primary_destination); 545 } 546 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 547 SCTP_MOBILITY_BASE)) { 548 sctp_move_chunks_from_net(stcb, 549 stcb->asoc.deleted_primary); 550 } 551 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 552 stcb->asoc.deleted_primary); 553 } 554 } else { 555 /* couldn't set the requested primary address! */ 556 SCTPDBG(SCTP_DEBUG_ASCONF1, 557 "process_asconf_set_primary: set primary failed!\n"); 558 /* must have been an invalid address, so report */ 559 m_reply = sctp_asconf_error_response(aph->correlation_id, 560 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 561 aparam_length); 562 } 563 564 return (m_reply); 565 } 566 567 /* 568 * handles an ASCONF chunk. 569 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 570 */ 571 void 572 sctp_handle_asconf(struct mbuf *m, unsigned int offset, 573 struct sockaddr *src, 574 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 575 int first) 576 { 577 struct sctp_association *asoc; 578 uint32_t serial_num; 579 struct mbuf *n, *m_ack, *m_result, *m_tail; 580 struct sctp_asconf_ack_chunk *ack_cp; 581 struct sctp_asconf_paramhdr *aph, *ack_aph; 582 struct sctp_ipv6addr_param *p_addr; 583 unsigned int asconf_limit, cnt; 584 int error = 0; /* did an error occur? */ 585 586 /* asconf param buffer */ 587 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 588 struct sctp_asconf_ack *ack, *ack_next; 589 590 /* verify minimum length */ 591 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 592 SCTPDBG(SCTP_DEBUG_ASCONF1, 593 "handle_asconf: chunk too small = %xh\n", 594 ntohs(cp->ch.chunk_length)); 595 return; 596 } 597 asoc = &stcb->asoc; 598 serial_num = ntohl(cp->serial_number); 599 600 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 601 /* got a duplicate ASCONF */ 602 SCTPDBG(SCTP_DEBUG_ASCONF1, 603 "handle_asconf: got duplicate serial number = %xh\n", 604 serial_num); 605 return; 606 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 607 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 608 serial_num, asoc->asconf_seq_in + 1); 609 return; 610 } 611 /* it's the expected "next" sequence number, so process it */ 612 asoc->asconf_seq_in = serial_num; /* update sequence */ 613 /* get length of all the param's in the ASCONF */ 614 asconf_limit = offset + ntohs(cp->ch.chunk_length); 615 SCTPDBG(SCTP_DEBUG_ASCONF1, 616 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 617 asconf_limit, serial_num); 618 619 if (first) { 620 /* delete old cache */ 621 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 622 623 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 624 if (ack->serial_number == serial_num) 625 break; 626 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 627 ack->serial_number, serial_num); 628 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 629 if (ack->data != NULL) { 630 sctp_m_freem(ack->data); 631 } 632 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 633 } 634 } 635 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 636 M_NOWAIT, 1, MT_DATA); 637 if (m_ack == NULL) { 638 SCTPDBG(SCTP_DEBUG_ASCONF1, 639 "handle_asconf: couldn't get mbuf!\n"); 640 return; 641 } 642 m_tail = m_ack; /* current reply chain's tail */ 643 644 /* fill in ASCONF-ACK header */ 645 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 646 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 647 ack_cp->ch.chunk_flags = 0; 648 ack_cp->serial_number = htonl(serial_num); 649 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 650 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 651 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 652 653 /* skip the lookup address parameter */ 654 offset += sizeof(struct sctp_asconf_chunk); 655 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 656 if (p_addr == NULL) { 657 SCTPDBG(SCTP_DEBUG_ASCONF1, 658 "handle_asconf: couldn't get lookup addr!\n"); 659 /* respond with a missing/invalid mandatory parameter error */ 660 return; 661 } 662 /* param_length is already validated in process_control... */ 663 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 664 665 /* get pointer to first asconf param in ASCONF-ACK */ 666 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk)); 667 if (ack_aph == NULL) { 668 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n"); 669 return; 670 } 671 /* get pointer to first asconf param in ASCONF */ 672 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 673 if (aph == NULL) { 674 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 675 goto send_reply; 676 } 677 /* process through all parameters */ 678 cnt = 0; 679 while (aph != NULL) { 680 unsigned int param_length, param_type; 681 682 param_type = ntohs(aph->ph.param_type); 683 param_length = ntohs(aph->ph.param_length); 684 if (offset + param_length > asconf_limit) { 685 /* parameter goes beyond end of chunk! */ 686 sctp_m_freem(m_ack); 687 return; 688 } 689 m_result = NULL; 690 691 if (param_length > sizeof(aparam_buf)) { 692 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 693 sctp_m_freem(m_ack); 694 return; 695 } 696 if (param_length <= sizeof(struct sctp_paramhdr)) { 697 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 698 sctp_m_freem(m_ack); 699 } 700 /* get the entire parameter */ 701 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 702 if (aph == NULL) { 703 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 704 sctp_m_freem(m_ack); 705 return; 706 } 707 switch (param_type) { 708 case SCTP_ADD_IP_ADDRESS: 709 asoc->peer_supports_asconf = 1; 710 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 711 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 712 cnt++; 713 break; 714 case SCTP_DEL_IP_ADDRESS: 715 asoc->peer_supports_asconf = 1; 716 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 717 error); 718 break; 719 case SCTP_ERROR_CAUSE_IND: 720 /* not valid in an ASCONF chunk */ 721 break; 722 case SCTP_SET_PRIM_ADDR: 723 asoc->peer_supports_asconf = 1; 724 m_result = sctp_process_asconf_set_primary(src, aph, 725 stcb, error); 726 break; 727 case SCTP_NAT_VTAGS: 728 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 729 break; 730 case SCTP_SUCCESS_REPORT: 731 /* not valid in an ASCONF chunk */ 732 break; 733 case SCTP_ULP_ADAPTATION: 734 /* FIX */ 735 break; 736 default: 737 if ((param_type & 0x8000) == 0) { 738 /* Been told to STOP at this param */ 739 asconf_limit = offset; 740 /* 741 * FIX FIX - We need to call 742 * sctp_arethere_unrecognized_parameters() 743 * to get a operr and send it for any 744 * param's with the 0x4000 bit set OR do it 745 * here ourselves... note we still must STOP 746 * if the 0x8000 bit is clear. 747 */ 748 } 749 /* unknown/invalid param type */ 750 break; 751 } /* switch */ 752 753 /* add any (error) result to the reply mbuf chain */ 754 if (m_result != NULL) { 755 SCTP_BUF_NEXT(m_tail) = m_result; 756 m_tail = m_result; 757 /* update lengths, make sure it's aligned too */ 758 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 759 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 760 /* set flag to force success reports */ 761 error = 1; 762 } 763 offset += SCTP_SIZE32(param_length); 764 /* update remaining ASCONF message length to process */ 765 if (offset >= asconf_limit) { 766 /* no more data in the mbuf chain */ 767 break; 768 } 769 /* get pointer to next asconf param */ 770 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 771 sizeof(struct sctp_asconf_paramhdr), 772 (uint8_t *) & aparam_buf); 773 if (aph == NULL) { 774 /* can't get an asconf paramhdr */ 775 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 776 /* FIX ME - add error here... */ 777 } 778 } 779 780 send_reply: 781 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 782 /* save the ASCONF-ACK reply */ 783 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 784 struct sctp_asconf_ack); 785 if (ack == NULL) { 786 sctp_m_freem(m_ack); 787 return; 788 } 789 ack->serial_number = serial_num; 790 ack->last_sent_to = NULL; 791 ack->data = m_ack; 792 ack->len = 0; 793 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 794 ack->len += SCTP_BUF_LEN(n); 795 } 796 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 797 798 /* see if last_control_chunk_from is set properly (use IP src addr) */ 799 if (stcb->asoc.last_control_chunk_from == NULL) { 800 /* 801 * this could happen if the source address was just newly 802 * added 803 */ 804 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 805 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 806 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 807 /* look up the from address */ 808 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 809 #ifdef SCTP_DEBUG 810 if (stcb->asoc.last_control_chunk_from == NULL) { 811 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 812 } 813 #endif 814 } 815 } 816 817 /* 818 * does the address match? returns 0 if not, 1 if so 819 */ 820 static uint32_t 821 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 822 { 823 switch (sa->sa_family) { 824 #ifdef INET6 825 case AF_INET6: 826 { 827 /* XXX scopeid */ 828 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 829 830 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 831 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 832 sizeof(struct in6_addr)) == 0)) { 833 return (1); 834 } 835 break; 836 } 837 #endif 838 #ifdef INET 839 case AF_INET: 840 { 841 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 842 843 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 844 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 845 sizeof(struct in_addr)) == 0)) { 846 return (1); 847 } 848 break; 849 } 850 #endif 851 default: 852 break; 853 } 854 return (0); 855 } 856 857 /* 858 * does the address match? returns 0 if not, 1 if so 859 */ 860 static uint32_t 861 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 862 { 863 uint16_t param_type, param_length; 864 865 param_type = ntohs(ph->param_type); 866 param_length = ntohs(ph->param_length); 867 switch (sa->sa_family) { 868 #ifdef INET6 869 case AF_INET6: 870 { 871 /* XXX scopeid */ 872 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 873 struct sctp_ipv6addr_param *v6addr; 874 875 v6addr = (struct sctp_ipv6addr_param *)ph; 876 if ((param_type == SCTP_IPV6_ADDRESS) && 877 param_length == sizeof(struct sctp_ipv6addr_param) && 878 (memcmp(&v6addr->addr, &sin6->sin6_addr, 879 sizeof(struct in6_addr)) == 0)) { 880 return (1); 881 } 882 break; 883 } 884 #endif 885 #ifdef INET 886 case AF_INET: 887 { 888 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 889 struct sctp_ipv4addr_param *v4addr; 890 891 v4addr = (struct sctp_ipv4addr_param *)ph; 892 if ((param_type == SCTP_IPV4_ADDRESS) && 893 param_length == sizeof(struct sctp_ipv4addr_param) && 894 (memcmp(&v4addr->addr, &sin->sin_addr, 895 sizeof(struct in_addr)) == 0)) { 896 return (1); 897 } 898 break; 899 } 900 #endif 901 default: 902 break; 903 } 904 return (0); 905 } 906 907 /* 908 * Cleanup for non-responded/OP ERR'd ASCONF 909 */ 910 void 911 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 912 { 913 /* mark peer as ASCONF incapable */ 914 stcb->asoc.peer_supports_asconf = 0; 915 /* 916 * clear out any existing asconfs going out 917 */ 918 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 919 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 920 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 921 /* remove the old ASCONF on our outbound queue */ 922 sctp_toss_old_asconf(stcb); 923 } 924 925 /* 926 * cleanup any cached source addresses that may be topologically 927 * incorrect after a new address has been added to this interface. 928 */ 929 static void 930 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 931 { 932 struct sctp_nets *net; 933 934 /* 935 * Ideally, we want to only clear cached routes and source addresses 936 * that are topologically incorrect. But since there is no easy way 937 * to know whether the newly added address on the ifn would cause a 938 * routing change (i.e. a new egress interface would be chosen) 939 * without doing a new routing lookup and source address selection, 940 * we will (for now) just flush any cached route using a different 941 * ifn (and cached source addrs) and let output re-choose them 942 * during the next send on that net. 943 */ 944 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 945 /* 946 * clear any cached route (and cached source address) if the 947 * route's interface is NOT the same as the address change. 948 * If it's the same interface, just clear the cached source 949 * address. 950 */ 951 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 952 ((ifn == NULL) || 953 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 954 /* clear any cached route */ 955 RTFREE(net->ro.ro_rt); 956 net->ro.ro_rt = NULL; 957 } 958 /* clear any cached source address */ 959 if (net->src_addr_selected) { 960 sctp_free_ifa(net->ro._s_addr); 961 net->ro._s_addr = NULL; 962 net->src_addr_selected = 0; 963 } 964 } 965 } 966 967 968 void 969 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 970 { 971 int error; 972 973 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 974 return; 975 } 976 if (stcb->asoc.deleted_primary == NULL) { 977 return; 978 } 979 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 980 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 981 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 982 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 983 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 984 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 985 stcb->asoc.deleted_primary, 986 SCTP_FROM_SCTP_TIMER + SCTP_LOC_8); 987 stcb->asoc.num_send_timers_up--; 988 if (stcb->asoc.num_send_timers_up < 0) { 989 stcb->asoc.num_send_timers_up = 0; 990 } 991 SCTP_TCB_LOCK_ASSERT(stcb); 992 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 993 stcb->asoc.deleted_primary); 994 if (error) { 995 SCTP_INP_DECR_REF(stcb->sctp_ep); 996 return; 997 } 998 SCTP_TCB_LOCK_ASSERT(stcb); 999 #ifdef SCTP_AUDITING_ENABLED 1000 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1001 #endif 1002 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1003 if ((stcb->asoc.num_send_timers_up == 0) && 1004 (stcb->asoc.sent_queue_cnt > 0)) { 1005 struct sctp_tmit_chunk *chk; 1006 1007 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1008 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1009 stcb, chk->whoTo); 1010 } 1011 } 1012 return; 1013 } 1014 1015 static int 1016 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1017 1018 void 1019 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1020 { 1021 struct sctp_tmit_chunk *chk; 1022 1023 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1024 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1025 SCTP_FROM_SCTP_TIMER + SCTP_LOC_5); 1026 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1027 net->error_count = 0; 1028 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1029 if (chk->whoTo == net) { 1030 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1031 chk->sent = SCTP_DATAGRAM_RESEND; 1032 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1033 sctp_flight_size_decrease(chk); 1034 sctp_total_flight_decrease(stcb, chk); 1035 net->marked_retrans++; 1036 stcb->asoc.marked_retrans++; 1037 } 1038 } 1039 } 1040 if (net->marked_retrans) { 1041 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1042 } 1043 } 1044 1045 static void 1046 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1047 { 1048 struct sctp_nets *net; 1049 int addrnum, changed; 1050 1051 /* 1052 * If number of local valid addresses is 1, the valid address is 1053 * probably newly added address. Several valid addresses in this 1054 * association. A source address may not be changed. Additionally, 1055 * they can be configured on a same interface as "alias" addresses. 1056 * (by micchie) 1057 */ 1058 addrnum = sctp_local_addr_count(stcb); 1059 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1060 addrnum); 1061 if (addrnum == 1) { 1062 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1063 /* clear any cached route and source address */ 1064 if (net->ro.ro_rt) { 1065 RTFREE(net->ro.ro_rt); 1066 net->ro.ro_rt = NULL; 1067 } 1068 if (net->src_addr_selected) { 1069 sctp_free_ifa(net->ro._s_addr); 1070 net->ro._s_addr = NULL; 1071 net->src_addr_selected = 0; 1072 } 1073 /* Retransmit unacknowledged DATA chunks immediately */ 1074 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1075 SCTP_MOBILITY_FASTHANDOFF)) { 1076 sctp_net_immediate_retrans(stcb, net); 1077 } 1078 /* also, SET PRIMARY is maybe already sent */ 1079 } 1080 return; 1081 } 1082 /* Multiple local addresses exsist in the association. */ 1083 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1084 /* clear any cached route and source address */ 1085 if (net->ro.ro_rt) { 1086 RTFREE(net->ro.ro_rt); 1087 net->ro.ro_rt = NULL; 1088 } 1089 if (net->src_addr_selected) { 1090 sctp_free_ifa(net->ro._s_addr); 1091 net->ro._s_addr = NULL; 1092 net->src_addr_selected = 0; 1093 } 1094 /* 1095 * Check if the nexthop is corresponding to the new address. 1096 * If the new address is corresponding to the current 1097 * nexthop, the path will be changed. If the new address is 1098 * NOT corresponding to the current nexthop, the path will 1099 * not be changed. 1100 */ 1101 SCTP_RTALLOC((sctp_route_t *) & net->ro, 1102 stcb->sctp_ep->def_vrf_id); 1103 if (net->ro.ro_rt == NULL) 1104 continue; 1105 1106 changed = 0; 1107 switch (net->ro._l_addr.sa.sa_family) { 1108 #ifdef INET 1109 case AF_INET: 1110 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) { 1111 changed = 1; 1112 } 1113 break; 1114 #endif 1115 #ifdef INET6 1116 case AF_INET6: 1117 if (sctp_v6src_match_nexthop( 1118 &newifa->address.sin6, (sctp_route_t *) & net->ro)) { 1119 changed = 1; 1120 } 1121 break; 1122 #endif 1123 default: 1124 break; 1125 } 1126 /* 1127 * if the newly added address does not relate routing 1128 * information, we skip. 1129 */ 1130 if (changed == 0) 1131 continue; 1132 /* Retransmit unacknowledged DATA chunks immediately */ 1133 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1134 SCTP_MOBILITY_FASTHANDOFF)) { 1135 sctp_net_immediate_retrans(stcb, net); 1136 } 1137 /* Send SET PRIMARY for this new address */ 1138 if (net == stcb->asoc.primary_destination) { 1139 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1140 SCTP_SET_PRIM_ADDR); 1141 } 1142 } 1143 } 1144 1145 /* 1146 * process an ADD/DELETE IP ack from peer. 1147 * addr: corresponding sctp_ifa to the address being added/deleted. 1148 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1149 * flag: 1=success, 0=failure. 1150 */ 1151 static void 1152 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1153 { 1154 /* 1155 * do the necessary asoc list work- if we get a failure indication, 1156 * leave the address on the assoc's restricted list. If we get a 1157 * success indication, remove the address from the restricted list. 1158 */ 1159 /* 1160 * Note: this will only occur for ADD_IP_ADDRESS, since 1161 * DEL_IP_ADDRESS is never actually added to the list... 1162 */ 1163 if (flag) { 1164 /* success case, so remove from the restricted list */ 1165 sctp_del_local_addr_restricted(stcb, addr); 1166 1167 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1168 SCTP_MOBILITY_BASE) || 1169 sctp_is_mobility_feature_on(stcb->sctp_ep, 1170 SCTP_MOBILITY_FASTHANDOFF)) { 1171 sctp_path_check_and_react(stcb, addr); 1172 return; 1173 } 1174 /* clear any cached/topologically incorrect source addresses */ 1175 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1176 } 1177 /* else, leave it on the list */ 1178 } 1179 1180 /* 1181 * add an asconf add/delete/set primary IP address parameter to the queue. 1182 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1183 * returns 0 if queued, -1 if not queued/removed. 1184 * NOTE: if adding, but a delete for the same address is already scheduled 1185 * (and not yet sent out), simply remove it from queue. Same for deleting 1186 * an address already scheduled for add. If a duplicate operation is found, 1187 * ignore the new one. 1188 */ 1189 static int 1190 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1191 uint16_t type) 1192 { 1193 struct sctp_asconf_addr *aa, *aa_next; 1194 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.scope.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.scope.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.scope.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.scope.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.scope.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, &stcb->asoc.scope, 0) == 0) { 2202 continue; 2203 } 2204 } 2205 } 2206 /* queue an asconf for this address add/delete */ 2207 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2208 stcb->asoc.peer_supports_asconf) { 2209 /* queue an asconf for this addr */ 2210 status = sctp_asconf_queue_add(stcb, ifa, type); 2211 /* 2212 * if queued ok, and in the open state, update the 2213 * count of queued params. If in the non-open 2214 * state, these get sent when the assoc goes open. 2215 */ 2216 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2217 if (status >= 0) { 2218 num_queued++; 2219 } 2220 } 2221 } 2222 } 2223 /* 2224 * If we have queued params in the open state, send out an ASCONF. 2225 */ 2226 if (num_queued > 0) { 2227 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2228 } 2229 } 2230 2231 void 2232 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2233 { 2234 struct sctp_asconf_iterator *asc; 2235 struct sctp_ifa *ifa; 2236 struct sctp_laddr *l, *nl; 2237 2238 asc = (struct sctp_asconf_iterator *)ptr; 2239 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2240 ifa = l->ifa; 2241 if (l->action == SCTP_ADD_IP_ADDRESS) { 2242 /* Clear the defer use flag */ 2243 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2244 } 2245 sctp_free_ifa(ifa); 2246 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2247 SCTP_DECR_LADDR_COUNT(); 2248 } 2249 SCTP_FREE(asc, SCTP_M_ASC_IT); 2250 } 2251 2252 /* 2253 * sa is the sockaddr to ask the peer to set primary to. 2254 * returns: 0 = completed, -1 = error 2255 */ 2256 int32_t 2257 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2258 { 2259 uint32_t vrf_id; 2260 struct sctp_ifa *ifa; 2261 2262 /* find the ifa for the desired set primary */ 2263 vrf_id = stcb->asoc.vrf_id; 2264 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2265 if (ifa == NULL) { 2266 /* Invalid address */ 2267 return (-1); 2268 } 2269 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2270 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2271 /* set primary queuing succeeded */ 2272 SCTPDBG(SCTP_DEBUG_ASCONF1, 2273 "set_primary_ip_address_sa: queued on tcb=%p, ", 2274 (void *)stcb); 2275 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2276 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2277 #ifdef SCTP_TIMER_BASED_ASCONF 2278 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2279 stcb->sctp_ep, stcb, 2280 stcb->asoc.primary_destination); 2281 #else 2282 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2283 #endif 2284 } 2285 } else { 2286 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2287 (void *)stcb); 2288 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2289 return (-1); 2290 } 2291 return (0); 2292 } 2293 2294 void 2295 sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2296 { 2297 struct sctp_inpcb *inp; 2298 2299 /* go through all our PCB's */ 2300 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2301 struct sctp_tcb *stcb; 2302 2303 /* process for all associations for this endpoint */ 2304 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2305 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2306 if (!sctp_asconf_queue_add(stcb, ifa, 2307 SCTP_SET_PRIM_ADDR)) { 2308 /* set primary queuing succeeded */ 2309 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2310 (void *)stcb); 2311 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2312 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2313 #ifdef SCTP_TIMER_BASED_ASCONF 2314 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2315 stcb->sctp_ep, stcb, 2316 stcb->asoc.primary_destination); 2317 #else 2318 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2319 #endif 2320 } 2321 } 2322 } /* for each stcb */ 2323 } /* for each inp */ 2324 } 2325 2326 int 2327 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2328 { 2329 struct sctp_tmit_chunk *chk, *nchk; 2330 unsigned int offset, asconf_limit; 2331 struct sctp_asconf_chunk *acp; 2332 struct sctp_asconf_paramhdr *aph; 2333 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2334 struct sctp_paramhdr *ph; 2335 int add_cnt, del_cnt; 2336 uint16_t last_param_type; 2337 2338 add_cnt = del_cnt = 0; 2339 last_param_type = 0; 2340 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2341 if (chk->data == NULL) { 2342 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2343 continue; 2344 } 2345 offset = 0; 2346 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2347 offset += sizeof(struct sctp_asconf_chunk); 2348 asconf_limit = ntohs(acp->ch.chunk_length); 2349 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2350 if (ph == NULL) { 2351 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2352 continue; 2353 } 2354 offset += ntohs(ph->param_length); 2355 2356 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2357 if (aph == NULL) { 2358 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2359 continue; 2360 } 2361 while (aph != NULL) { 2362 unsigned int param_length, param_type; 2363 2364 param_type = ntohs(aph->ph.param_type); 2365 param_length = ntohs(aph->ph.param_length); 2366 if (offset + param_length > asconf_limit) { 2367 /* parameter goes beyond end of chunk! */ 2368 break; 2369 } 2370 if (param_length > sizeof(aparam_buf)) { 2371 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2372 break; 2373 } 2374 if (param_length <= sizeof(struct sctp_paramhdr)) { 2375 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2376 break; 2377 } 2378 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2379 if (aph == NULL) { 2380 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2381 break; 2382 } 2383 ph = (struct sctp_paramhdr *)(aph + 1); 2384 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2385 switch (param_type) { 2386 case SCTP_ADD_IP_ADDRESS: 2387 add_cnt++; 2388 break; 2389 case SCTP_DEL_IP_ADDRESS: 2390 del_cnt++; 2391 break; 2392 default: 2393 break; 2394 } 2395 last_param_type = param_type; 2396 } 2397 offset += SCTP_SIZE32(param_length); 2398 if (offset >= asconf_limit) { 2399 /* no more data in the mbuf chain */ 2400 break; 2401 } 2402 /* get pointer to next asconf param */ 2403 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2404 } 2405 } 2406 2407 /* 2408 * we want to find the sequences which consist of ADD -> DEL -> ADD 2409 * or DEL -> ADD 2410 */ 2411 if (add_cnt > del_cnt || 2412 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2413 return (1); 2414 } 2415 return (0); 2416 } 2417 2418 static struct sockaddr * 2419 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2420 { 2421 struct sctp_vrf *vrf = NULL; 2422 struct sctp_ifn *sctp_ifn; 2423 struct sctp_ifa *sctp_ifa; 2424 2425 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2426 SCTP_IPI_ADDR_RLOCK(); 2427 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2428 if (vrf == NULL) { 2429 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2430 SCTP_IPI_ADDR_RUNLOCK(); 2431 return (NULL); 2432 } 2433 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2434 if (stcb->asoc.scope.loopback_scope == 0 && 2435 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2436 /* Skip if loopback_scope not set */ 2437 continue; 2438 } 2439 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2440 switch (sctp_ifa->address.sa.sa_family) { 2441 #ifdef INET 2442 case AF_INET: 2443 if (stcb->asoc.scope.ipv4_addr_legal) { 2444 struct sockaddr_in *sin; 2445 2446 sin = (struct sockaddr_in *)&sctp_ifa->address.sa; 2447 if (sin->sin_addr.s_addr == 0) { 2448 /* skip unspecifed addresses */ 2449 continue; 2450 } 2451 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2452 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2453 continue; 2454 2455 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2456 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2457 continue; 2458 /* 2459 * found a valid local v4 address to 2460 * use 2461 */ 2462 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2463 SCTP_IPI_ADDR_RUNLOCK(); 2464 return (&sctp_ifa->address.sa); 2465 } 2466 break; 2467 #endif 2468 #ifdef INET6 2469 case AF_INET6: 2470 if (stcb->asoc.scope.ipv6_addr_legal) { 2471 struct sockaddr_in6 *sin6; 2472 2473 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2474 continue; 2475 } 2476 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa; 2477 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2478 /* 2479 * we skip unspecifed 2480 * addresses 2481 */ 2482 continue; 2483 } 2484 if (stcb->asoc.scope.local_scope == 0 && 2485 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2486 continue; 2487 if (stcb->asoc.scope.site_scope == 0 && 2488 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2489 continue; 2490 2491 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2492 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2493 continue; 2494 /* 2495 * found a valid local v6 address to 2496 * use 2497 */ 2498 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2499 SCTP_IPI_ADDR_RUNLOCK(); 2500 return (&sctp_ifa->address.sa); 2501 } 2502 break; 2503 #endif 2504 default: 2505 break; 2506 } 2507 } 2508 } 2509 /* no valid addresses found */ 2510 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2511 SCTP_IPI_ADDR_RUNLOCK(); 2512 return (NULL); 2513 } 2514 2515 static struct sockaddr * 2516 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2517 { 2518 struct sctp_laddr *laddr; 2519 2520 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2521 if (laddr->ifa == NULL) { 2522 continue; 2523 } 2524 /* is the address restricted ? */ 2525 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2526 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2527 continue; 2528 2529 /* found a valid local address to use */ 2530 return (&laddr->ifa->address.sa); 2531 } 2532 /* no valid addresses found */ 2533 return (NULL); 2534 } 2535 2536 /* 2537 * builds an ASCONF chunk from queued ASCONF params. 2538 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2539 */ 2540 struct mbuf * 2541 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2542 { 2543 struct mbuf *m_asconf, *m_asconf_chk; 2544 struct sctp_asconf_addr *aa; 2545 struct sctp_asconf_chunk *acp; 2546 struct sctp_asconf_paramhdr *aph; 2547 struct sctp_asconf_addr_param *aap; 2548 uint32_t p_length; 2549 uint32_t correlation_id = 1; /* 0 is reserved... */ 2550 caddr_t ptr, lookup_ptr; 2551 uint8_t lookup_used = 0; 2552 2553 /* are there any asconf params to send? */ 2554 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2555 if (aa->sent == 0) 2556 break; 2557 } 2558 if (aa == NULL) 2559 return (NULL); 2560 2561 /* 2562 * get a chunk header mbuf and a cluster for the asconf params since 2563 * it's simpler to fill in the asconf chunk header lookup address on 2564 * the fly 2565 */ 2566 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2567 if (m_asconf_chk == NULL) { 2568 /* no mbuf's */ 2569 SCTPDBG(SCTP_DEBUG_ASCONF1, 2570 "compose_asconf: couldn't get chunk mbuf!\n"); 2571 return (NULL); 2572 } 2573 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2574 if (m_asconf == NULL) { 2575 /* no mbuf's */ 2576 SCTPDBG(SCTP_DEBUG_ASCONF1, 2577 "compose_asconf: couldn't get mbuf!\n"); 2578 sctp_m_freem(m_asconf_chk); 2579 return (NULL); 2580 } 2581 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2582 SCTP_BUF_LEN(m_asconf) = 0; 2583 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2584 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2585 /* save pointers to lookup address and asconf params */ 2586 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2587 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2588 2589 /* fill in chunk header info */ 2590 acp->ch.chunk_type = SCTP_ASCONF; 2591 acp->ch.chunk_flags = 0; 2592 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2593 stcb->asoc.asconf_seq_out++; 2594 2595 /* add parameters... up to smallest MTU allowed */ 2596 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2597 if (aa->sent) 2598 continue; 2599 /* get the parameter length */ 2600 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2601 /* will it fit in current chunk? */ 2602 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) { 2603 /* won't fit, so we're done with this chunk */ 2604 break; 2605 } 2606 /* assign (and store) a correlation id */ 2607 aa->ap.aph.correlation_id = correlation_id++; 2608 2609 /* 2610 * fill in address if we're doing a delete this is a simple 2611 * way for us to fill in the correlation address, which 2612 * should only be used by the peer if we're deleting our 2613 * source address and adding a new address (e.g. renumbering 2614 * case) 2615 */ 2616 if (lookup_used == 0 && 2617 (aa->special_del == 0) && 2618 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2619 struct sctp_ipv6addr_param *lookup; 2620 uint16_t p_size, addr_size; 2621 2622 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2623 lookup->ph.param_type = 2624 htons(aa->ap.addrp.ph.param_type); 2625 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2626 /* copy IPv6 address */ 2627 p_size = sizeof(struct sctp_ipv6addr_param); 2628 addr_size = sizeof(struct in6_addr); 2629 } else { 2630 /* copy IPv4 address */ 2631 p_size = sizeof(struct sctp_ipv4addr_param); 2632 addr_size = sizeof(struct in_addr); 2633 } 2634 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2635 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2636 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2637 lookup_used = 1; 2638 } 2639 /* copy into current space */ 2640 memcpy(ptr, &aa->ap, p_length); 2641 2642 /* network elements and update lengths */ 2643 aph = (struct sctp_asconf_paramhdr *)ptr; 2644 aap = (struct sctp_asconf_addr_param *)ptr; 2645 /* correlation_id is transparent to peer, no htonl needed */ 2646 aph->ph.param_type = htons(aph->ph.param_type); 2647 aph->ph.param_length = htons(aph->ph.param_length); 2648 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2649 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2650 2651 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2652 ptr += SCTP_SIZE32(p_length); 2653 2654 /* 2655 * these params are removed off the pending list upon 2656 * getting an ASCONF-ACK back from the peer, just set flag 2657 */ 2658 aa->sent = 1; 2659 } 2660 /* check to see if the lookup addr has been populated yet */ 2661 if (lookup_used == 0) { 2662 /* NOTE: if the address param is optional, can skip this... */ 2663 /* add any valid (existing) address... */ 2664 struct sctp_ipv6addr_param *lookup; 2665 uint16_t p_size, addr_size; 2666 struct sockaddr *found_addr; 2667 caddr_t addr_ptr; 2668 2669 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2670 found_addr = sctp_find_valid_localaddr(stcb, 2671 addr_locked); 2672 else 2673 found_addr = sctp_find_valid_localaddr_ep(stcb); 2674 2675 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2676 if (found_addr != NULL) { 2677 switch (found_addr->sa_family) { 2678 #ifdef INET6 2679 case AF_INET6: 2680 /* copy IPv6 address */ 2681 lookup->ph.param_type = 2682 htons(SCTP_IPV6_ADDRESS); 2683 p_size = sizeof(struct sctp_ipv6addr_param); 2684 addr_size = sizeof(struct in6_addr); 2685 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2686 found_addr)->sin6_addr; 2687 break; 2688 #endif 2689 #ifdef INET 2690 case AF_INET: 2691 /* copy IPv4 address */ 2692 lookup->ph.param_type = 2693 htons(SCTP_IPV4_ADDRESS); 2694 p_size = sizeof(struct sctp_ipv4addr_param); 2695 addr_size = sizeof(struct in_addr); 2696 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2697 found_addr)->sin_addr; 2698 break; 2699 #endif 2700 default: 2701 p_size = 0; 2702 addr_size = 0; 2703 addr_ptr = NULL; 2704 break; 2705 } 2706 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2707 memcpy(lookup->addr, addr_ptr, addr_size); 2708 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2709 } else { 2710 /* uh oh... don't have any address?? */ 2711 SCTPDBG(SCTP_DEBUG_ASCONF1, 2712 "compose_asconf: no lookup addr!\n"); 2713 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2714 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2715 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2716 bzero(lookup->addr, sizeof(struct in_addr)); 2717 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2718 } 2719 } 2720 /* chain it all together */ 2721 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2722 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2723 acp->ch.chunk_length = ntohs(*retlen); 2724 2725 return (m_asconf_chk); 2726 } 2727 2728 /* 2729 * section to handle address changes before an association is up eg. changes 2730 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2731 */ 2732 2733 /* 2734 * processes the (local) addresses in the INIT-ACK chunk 2735 */ 2736 static void 2737 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2738 unsigned int offset, unsigned int length) 2739 { 2740 struct sctp_paramhdr tmp_param, *ph; 2741 uint16_t plen, ptype; 2742 struct sctp_ifa *sctp_ifa; 2743 2744 #ifdef INET6 2745 struct sctp_ipv6addr_param addr6_store; 2746 struct sockaddr_in6 sin6; 2747 2748 #endif 2749 #ifdef INET 2750 struct sctp_ipv4addr_param addr4_store; 2751 struct sockaddr_in sin; 2752 2753 #endif 2754 struct sockaddr *sa; 2755 uint32_t vrf_id; 2756 2757 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2758 if (stcb == NULL) /* Un-needed check for SA */ 2759 return; 2760 2761 /* convert to upper bound */ 2762 length += offset; 2763 2764 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2765 return; 2766 } 2767 /* init the addresses */ 2768 #ifdef INET6 2769 bzero(&sin6, sizeof(sin6)); 2770 sin6.sin6_family = AF_INET6; 2771 sin6.sin6_len = sizeof(sin6); 2772 sin6.sin6_port = stcb->rport; 2773 #endif 2774 2775 #ifdef INET 2776 bzero(&sin, sizeof(sin)); 2777 sin.sin_family = AF_INET; 2778 sin.sin_len = sizeof(sin); 2779 sin.sin_port = stcb->rport; 2780 #endif 2781 2782 /* go through the addresses in the init-ack */ 2783 ph = (struct sctp_paramhdr *) 2784 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2785 (uint8_t *) & tmp_param); 2786 while (ph != NULL) { 2787 ptype = ntohs(ph->param_type); 2788 plen = ntohs(ph->param_length); 2789 switch (ptype) { 2790 #ifdef INET6 2791 case SCTP_IPV6_ADDRESS: 2792 { 2793 struct sctp_ipv6addr_param *a6p; 2794 2795 /* get the entire IPv6 address param */ 2796 a6p = (struct sctp_ipv6addr_param *) 2797 sctp_m_getptr(m, offset, 2798 sizeof(struct sctp_ipv6addr_param), 2799 (uint8_t *) & addr6_store); 2800 if (plen != sizeof(struct sctp_ipv6addr_param) || 2801 a6p == NULL) { 2802 return; 2803 } 2804 memcpy(&sin6.sin6_addr, a6p->addr, 2805 sizeof(struct in6_addr)); 2806 sa = (struct sockaddr *)&sin6; 2807 break; 2808 } 2809 #endif 2810 #ifdef INET 2811 case SCTP_IPV4_ADDRESS: 2812 { 2813 struct sctp_ipv4addr_param *a4p; 2814 2815 /* get the entire IPv4 address param */ 2816 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2817 sizeof(struct sctp_ipv4addr_param), 2818 (uint8_t *) & addr4_store); 2819 if (plen != sizeof(struct sctp_ipv4addr_param) || 2820 a4p == NULL) { 2821 return; 2822 } 2823 sin.sin_addr.s_addr = a4p->addr; 2824 sa = (struct sockaddr *)&sin; 2825 break; 2826 } 2827 #endif 2828 default: 2829 goto next_addr; 2830 } 2831 2832 /* see if this address really (still) exists */ 2833 if (stcb) { 2834 vrf_id = stcb->asoc.vrf_id; 2835 } else { 2836 vrf_id = SCTP_DEFAULT_VRFID; 2837 } 2838 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id, 2839 SCTP_ADDR_NOT_LOCKED); 2840 if (sctp_ifa == NULL) { 2841 /* address doesn't exist anymore */ 2842 int status; 2843 2844 /* are ASCONFs allowed ? */ 2845 if ((sctp_is_feature_on(stcb->sctp_ep, 2846 SCTP_PCB_FLAGS_DO_ASCONF)) && 2847 stcb->asoc.peer_supports_asconf) { 2848 /* queue an ASCONF DEL_IP_ADDRESS */ 2849 status = sctp_asconf_queue_sa_delete(stcb, sa); 2850 /* 2851 * if queued ok, and in correct state, send 2852 * out the ASCONF. 2853 */ 2854 if (status == 0 && 2855 SCTP_GET_STATE(&stcb->asoc) == 2856 SCTP_STATE_OPEN) { 2857 #ifdef SCTP_TIMER_BASED_ASCONF 2858 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2859 stcb->sctp_ep, stcb, 2860 stcb->asoc.primary_destination); 2861 #else 2862 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2863 #endif 2864 } 2865 } 2866 } 2867 next_addr: 2868 /* 2869 * Sanity check: Make sure the length isn't 0, otherwise 2870 * we'll be stuck in this loop for a long time... 2871 */ 2872 if (SCTP_SIZE32(plen) == 0) { 2873 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2874 plen, ptype); 2875 return; 2876 } 2877 /* get next parameter */ 2878 offset += SCTP_SIZE32(plen); 2879 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2880 return; 2881 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2882 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2883 } /* while */ 2884 } 2885 2886 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2887 /* 2888 * checks to see if a specific address is in the initack address list returns 2889 * 1 if found, 0 if not 2890 */ 2891 static uint32_t 2892 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2893 { 2894 struct sctp_paramhdr tmp_param, *ph; 2895 uint16_t plen, ptype; 2896 2897 #ifdef INET 2898 struct sockaddr_in *sin; 2899 struct sctp_ipv4addr_param *a4p; 2900 struct sctp_ipv6addr_param addr4_store; 2901 2902 #endif 2903 #ifdef INET6 2904 struct sockaddr_in6 *sin6; 2905 struct sctp_ipv6addr_param *a6p; 2906 struct sctp_ipv6addr_param addr6_store; 2907 struct sockaddr_in6 sin6_tmp; 2908 2909 #endif 2910 2911 switch (sa->sa_family) { 2912 #ifdef INET 2913 case AF_INET: 2914 break; 2915 #endif 2916 #ifdef INET6 2917 case AF_INET6: 2918 break; 2919 #endif 2920 default: 2921 return (0); 2922 } 2923 2924 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2925 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2926 /* convert to upper bound */ 2927 length += offset; 2928 2929 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2930 SCTPDBG(SCTP_DEBUG_ASCONF1, 2931 "find_initack_addr: invalid offset?\n"); 2932 return (0); 2933 } 2934 /* go through the addresses in the init-ack */ 2935 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2936 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2937 while (ph != NULL) { 2938 ptype = ntohs(ph->param_type); 2939 plen = ntohs(ph->param_length); 2940 switch (ptype) { 2941 #ifdef INET6 2942 case SCTP_IPV6_ADDRESS: 2943 if (sa->sa_family == AF_INET6) { 2944 /* get the entire IPv6 address param */ 2945 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2946 break; 2947 } 2948 /* get the entire IPv6 address param */ 2949 a6p = (struct sctp_ipv6addr_param *) 2950 sctp_m_getptr(m, offset, 2951 sizeof(struct sctp_ipv6addr_param), 2952 (uint8_t *) & addr6_store); 2953 if (a6p == NULL) { 2954 return (0); 2955 } 2956 sin6 = (struct sockaddr_in6 *)sa; 2957 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2958 /* create a copy and clear scope */ 2959 memcpy(&sin6_tmp, sin6, 2960 sizeof(struct sockaddr_in6)); 2961 sin6 = &sin6_tmp; 2962 in6_clearscope(&sin6->sin6_addr); 2963 } 2964 if (memcmp(&sin6->sin6_addr, a6p->addr, 2965 sizeof(struct in6_addr)) == 0) { 2966 /* found it */ 2967 return (1); 2968 } 2969 } 2970 break; 2971 #endif /* INET6 */ 2972 #ifdef INET 2973 case SCTP_IPV4_ADDRESS: 2974 if (sa->sa_family == AF_INET) { 2975 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2976 break; 2977 } 2978 /* get the entire IPv4 address param */ 2979 a4p = (struct sctp_ipv4addr_param *) 2980 sctp_m_getptr(m, offset, 2981 sizeof(struct sctp_ipv4addr_param), 2982 (uint8_t *) & addr4_store); 2983 if (a4p == NULL) { 2984 return (0); 2985 } 2986 sin = (struct sockaddr_in *)sa; 2987 if (sin->sin_addr.s_addr == a4p->addr) { 2988 /* found it */ 2989 return (1); 2990 } 2991 } 2992 break; 2993 #endif 2994 default: 2995 break; 2996 } 2997 /* get next parameter */ 2998 offset += SCTP_SIZE32(plen); 2999 if (offset + sizeof(struct sctp_paramhdr) > length) { 3000 return (0); 3001 } 3002 ph = (struct sctp_paramhdr *) 3003 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3004 (uint8_t *) & tmp_param); 3005 } /* while */ 3006 /* not found! */ 3007 return (0); 3008 } 3009 3010 /* 3011 * makes sure that the current endpoint local addr list is consistent with 3012 * the new association (eg. subset bound, asconf allowed) adds addresses as 3013 * necessary 3014 */ 3015 static void 3016 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3017 int length, struct sockaddr *init_addr) 3018 { 3019 struct sctp_laddr *laddr; 3020 3021 /* go through the endpoint list */ 3022 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3023 /* be paranoid and validate the laddr */ 3024 if (laddr->ifa == NULL) { 3025 SCTPDBG(SCTP_DEBUG_ASCONF1, 3026 "check_addr_list_ep: laddr->ifa is NULL"); 3027 continue; 3028 } 3029 if (laddr->ifa == NULL) { 3030 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3031 continue; 3032 } 3033 /* do i have it implicitly? */ 3034 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3035 continue; 3036 } 3037 /* check to see if in the init-ack */ 3038 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3039 /* try to add it */ 3040 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3041 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3042 } 3043 } 3044 } 3045 3046 /* 3047 * makes sure that the current kernel address list is consistent with the new 3048 * association (with all addrs bound) adds addresses as necessary 3049 */ 3050 static void 3051 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3052 int length, struct sockaddr *init_addr, 3053 uint16_t local_scope, uint16_t site_scope, 3054 uint16_t ipv4_scope, uint16_t loopback_scope) 3055 { 3056 struct sctp_vrf *vrf = NULL; 3057 struct sctp_ifn *sctp_ifn; 3058 struct sctp_ifa *sctp_ifa; 3059 uint32_t vrf_id; 3060 3061 #ifdef INET 3062 struct sockaddr_in *sin; 3063 3064 #endif 3065 #ifdef INET6 3066 struct sockaddr_in6 *sin6; 3067 3068 #endif 3069 3070 if (stcb) { 3071 vrf_id = stcb->asoc.vrf_id; 3072 } else { 3073 return; 3074 } 3075 SCTP_IPI_ADDR_RLOCK(); 3076 vrf = sctp_find_vrf(vrf_id); 3077 if (vrf == NULL) { 3078 SCTP_IPI_ADDR_RUNLOCK(); 3079 return; 3080 } 3081 /* go through all our known interfaces */ 3082 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3083 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3084 /* skip loopback interface */ 3085 continue; 3086 } 3087 /* go through each interface address */ 3088 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3089 /* do i have it implicitly? */ 3090 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3091 continue; 3092 } 3093 switch (sctp_ifa->address.sa.sa_family) { 3094 #ifdef INET 3095 case AF_INET: 3096 sin = (struct sockaddr_in *)&sctp_ifa->address.sin; 3097 if ((ipv4_scope == 0) && 3098 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3099 /* private address not in scope */ 3100 continue; 3101 } 3102 break; 3103 #endif 3104 #ifdef INET6 3105 case AF_INET6: 3106 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sin6; 3107 if ((local_scope == 0) && 3108 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3109 continue; 3110 } 3111 if ((site_scope == 0) && 3112 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3113 continue; 3114 } 3115 break; 3116 #endif 3117 default: 3118 break; 3119 } 3120 /* check to see if in the init-ack */ 3121 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3122 /* try to add it */ 3123 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3124 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3125 SCTP_ADDR_LOCKED); 3126 } 3127 } /* end foreach ifa */ 3128 } /* end foreach ifn */ 3129 SCTP_IPI_ADDR_RUNLOCK(); 3130 } 3131 3132 /* 3133 * validates an init-ack chunk (from a cookie-echo) with current addresses 3134 * adds addresses from the init-ack into our local address list, if needed 3135 * queues asconf adds/deletes addresses as needed and makes appropriate list 3136 * changes for source address selection m, offset: points to the start of the 3137 * address list in an init-ack chunk length: total length of the address 3138 * params only init_addr: address where my INIT-ACK was sent from 3139 */ 3140 void 3141 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3142 int length, struct sockaddr *init_addr, 3143 uint16_t local_scope, uint16_t site_scope, 3144 uint16_t ipv4_scope, uint16_t loopback_scope) 3145 { 3146 /* process the local addresses in the initack */ 3147 sctp_process_initack_addresses(stcb, m, offset, length); 3148 3149 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3150 /* bound all case */ 3151 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3152 local_scope, site_scope, ipv4_scope, loopback_scope); 3153 } else { 3154 /* subset bound case */ 3155 if (sctp_is_feature_on(stcb->sctp_ep, 3156 SCTP_PCB_FLAGS_DO_ASCONF)) { 3157 /* asconf's allowed */ 3158 sctp_check_address_list_ep(stcb, m, offset, length, 3159 init_addr); 3160 } 3161 /* else, no asconfs allowed, so what we sent is what we get */ 3162 } 3163 } 3164 3165 /* 3166 * sctp_bindx() support 3167 */ 3168 uint32_t 3169 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3170 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3171 { 3172 struct sctp_ifa *ifa; 3173 struct sctp_laddr *laddr, *nladdr; 3174 3175 if (sa->sa_len == 0) { 3176 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3177 return (EINVAL); 3178 } 3179 if (sctp_ifap) { 3180 ifa = sctp_ifap; 3181 } else if (type == SCTP_ADD_IP_ADDRESS) { 3182 /* For an add the address MUST be on the system */ 3183 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3184 } else if (type == SCTP_DEL_IP_ADDRESS) { 3185 /* For a delete we need to find it in the inp */ 3186 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3187 } else { 3188 ifa = NULL; 3189 } 3190 if (ifa != NULL) { 3191 if (type == SCTP_ADD_IP_ADDRESS) { 3192 sctp_add_local_addr_ep(inp, ifa, type); 3193 } else if (type == SCTP_DEL_IP_ADDRESS) { 3194 if (inp->laddr_count < 2) { 3195 /* can't delete the last local address */ 3196 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3197 return (EINVAL); 3198 } 3199 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3200 sctp_nxt_addr) { 3201 if (ifa == laddr->ifa) { 3202 /* Mark in the delete */ 3203 laddr->action = type; 3204 } 3205 } 3206 } 3207 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3208 /* 3209 * There is no need to start the iterator if the inp 3210 * has no associations. 3211 */ 3212 if (type == SCTP_DEL_IP_ADDRESS) { 3213 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3214 if (laddr->ifa == ifa) { 3215 sctp_del_local_addr_ep(inp, ifa); 3216 } 3217 } 3218 } 3219 } else { 3220 struct sctp_asconf_iterator *asc; 3221 struct sctp_laddr *wi; 3222 3223 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3224 sizeof(struct sctp_asconf_iterator), 3225 SCTP_M_ASC_IT); 3226 if (asc == NULL) { 3227 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3228 return (ENOMEM); 3229 } 3230 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3231 if (wi == NULL) { 3232 SCTP_FREE(asc, SCTP_M_ASC_IT); 3233 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3234 return (ENOMEM); 3235 } 3236 LIST_INIT(&asc->list_of_work); 3237 asc->cnt = 1; 3238 SCTP_INCR_LADDR_COUNT(); 3239 wi->ifa = ifa; 3240 wi->action = type; 3241 atomic_add_int(&ifa->refcount, 1); 3242 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3243 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3244 sctp_asconf_iterator_stcb, 3245 sctp_asconf_iterator_ep_end, 3246 SCTP_PCB_ANY_FLAGS, 3247 SCTP_PCB_ANY_FEATURES, 3248 SCTP_ASOC_ANY_STATE, 3249 (void *)asc, 0, 3250 sctp_asconf_iterator_end, inp, 0); 3251 } 3252 return (0); 3253 } else { 3254 /* invalid address! */ 3255 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3256 return (EADDRNOTAVAIL); 3257 } 3258 } 3259 3260 void 3261 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3262 struct sctp_nets *net) 3263 { 3264 struct sctp_asconf_addr *aa; 3265 struct sctp_ifa *sctp_ifap; 3266 struct sctp_asconf_tag_param *vtag; 3267 3268 #ifdef INET 3269 struct sockaddr_in *to; 3270 3271 #endif 3272 #ifdef INET6 3273 struct sockaddr_in6 *to6; 3274 3275 #endif 3276 if (net == NULL) { 3277 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3278 return; 3279 } 3280 if (stcb == NULL) { 3281 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3282 return; 3283 } 3284 /* 3285 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3286 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3287 */ 3288 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3289 SCTP_M_ASC_ADDR); 3290 if (aa == NULL) { 3291 /* didn't get memory */ 3292 SCTPDBG(SCTP_DEBUG_ASCONF1, 3293 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3294 return; 3295 } 3296 aa->special_del = 0; 3297 /* fill in asconf address parameter fields */ 3298 /* top level elements are "networked" during send */ 3299 aa->ifa = NULL; 3300 aa->sent = 0; /* clear sent flag */ 3301 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3302 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3303 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3304 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3305 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3306 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3307 3308 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3309 SCTP_M_ASC_ADDR); 3310 if (aa == NULL) { 3311 /* didn't get memory */ 3312 SCTPDBG(SCTP_DEBUG_ASCONF1, 3313 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3314 return; 3315 } 3316 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3317 /* fill in asconf address parameter fields */ 3318 /* ADD(0.0.0.0) */ 3319 switch (net->ro._l_addr.sa.sa_family) { 3320 #ifdef INET 3321 case AF_INET: 3322 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3323 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3324 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3325 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3326 /* No need to add an address, we are using 0.0.0.0 */ 3327 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3328 break; 3329 #endif 3330 #ifdef INET6 3331 case AF_INET6: 3332 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3333 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3334 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3335 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3336 /* No need to add an address, we are using 0.0.0.0 */ 3337 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3338 break; 3339 #endif 3340 } 3341 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3342 SCTP_M_ASC_ADDR); 3343 if (aa == NULL) { 3344 /* didn't get memory */ 3345 SCTPDBG(SCTP_DEBUG_ASCONF1, 3346 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3347 return; 3348 } 3349 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3350 /* fill in asconf address parameter fields */ 3351 /* ADD(0.0.0.0) */ 3352 switch (net->ro._l_addr.sa.sa_family) { 3353 #ifdef INET 3354 case AF_INET: 3355 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3356 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3357 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3358 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3359 /* No need to add an address, we are using 0.0.0.0 */ 3360 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3361 break; 3362 #endif 3363 #ifdef INET6 3364 case AF_INET6: 3365 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3366 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3367 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3368 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3369 /* No need to add an address, we are using 0.0.0.0 */ 3370 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3371 break; 3372 #endif 3373 } 3374 /* Now we must hunt the addresses and add all global addresses */ 3375 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3376 struct sctp_vrf *vrf = NULL; 3377 struct sctp_ifn *sctp_ifnp; 3378 uint32_t vrf_id; 3379 3380 vrf_id = stcb->sctp_ep->def_vrf_id; 3381 vrf = sctp_find_vrf(vrf_id); 3382 if (vrf == NULL) { 3383 goto skip_rest; 3384 } 3385 SCTP_IPI_ADDR_RLOCK(); 3386 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3387 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3388 switch (sctp_ifap->address.sa.sa_family) { 3389 #ifdef INET 3390 case AF_INET: 3391 to = &sctp_ifap->address.sin; 3392 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3393 continue; 3394 } 3395 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3396 continue; 3397 } 3398 break; 3399 #endif 3400 #ifdef INET6 3401 case AF_INET6: 3402 to6 = &sctp_ifap->address.sin6; 3403 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3404 continue; 3405 } 3406 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3407 continue; 3408 } 3409 break; 3410 #endif 3411 default: 3412 continue; 3413 } 3414 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3415 } 3416 } 3417 SCTP_IPI_ADDR_RUNLOCK(); 3418 } else { 3419 struct sctp_laddr *laddr; 3420 3421 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3422 if (laddr->ifa == NULL) { 3423 continue; 3424 } 3425 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3426 /* 3427 * Address being deleted by the system, dont 3428 * list. 3429 */ 3430 continue; 3431 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3432 /* 3433 * Address being deleted on this ep don't 3434 * list. 3435 */ 3436 continue; 3437 } 3438 sctp_ifap = laddr->ifa; 3439 switch (sctp_ifap->address.sa.sa_family) { 3440 #ifdef INET 3441 case AF_INET: 3442 to = &sctp_ifap->address.sin; 3443 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3444 continue; 3445 } 3446 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3447 continue; 3448 } 3449 break; 3450 #endif 3451 #ifdef INET6 3452 case AF_INET6: 3453 to6 = &sctp_ifap->address.sin6; 3454 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3455 continue; 3456 } 3457 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3458 continue; 3459 } 3460 break; 3461 #endif 3462 default: 3463 continue; 3464 } 3465 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3466 } 3467 } 3468 skip_rest: 3469 /* Now we must send the asconf into the queue */ 3470 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3471 } 3472