sctp_asconf.c revision 277033
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: head/sys/netinet/sctp_asconf.c 277033 2015-01-11 22:23:39Z tuexen $"); 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 */ 76static struct mbuf * 77sctp_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 99static struct mbuf * 100sctp_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 145static struct mbuf * 146sctp_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 union sctp_sockstore store; 152 struct sctp_paramhdr *ph; 153 uint16_t param_type, aparam_length; 154 155#if defined(INET) || defined(INET6) 156 uint16_t param_length; 157 158#endif 159 struct sockaddr *sa; 160 int zero_address = 0; 161 int bad_address = 0; 162 163#ifdef INET 164 struct sockaddr_in *sin; 165 struct sctp_ipv4addr_param *v4addr; 166 167#endif 168#ifdef INET6 169 struct sockaddr_in6 *sin6; 170 struct sctp_ipv6addr_param *v6addr; 171 172#endif 173 174 aparam_length = ntohs(aph->ph.param_length); 175 ph = (struct sctp_paramhdr *)(aph + 1); 176 param_type = ntohs(ph->param_type); 177#if defined(INET) || defined(INET6) 178 param_length = ntohs(ph->param_length); 179#endif 180 sa = &store.sa; 181 switch (param_type) { 182#ifdef INET 183 case SCTP_IPV4_ADDRESS: 184 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 185 /* invalid param size */ 186 return (NULL); 187 } 188 v4addr = (struct sctp_ipv4addr_param *)ph; 189 sin = &store.sin; 190 bzero(sin, sizeof(*sin)); 191 sin->sin_family = AF_INET; 192 sin->sin_len = sizeof(struct sockaddr_in); 193 sin->sin_port = stcb->rport; 194 sin->sin_addr.s_addr = v4addr->addr; 195 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || 196 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 197 bad_address = 1; 198 } 199 if (sin->sin_addr.s_addr == INADDR_ANY) 200 zero_address = 1; 201 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 202 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 203 break; 204#endif 205#ifdef INET6 206 case SCTP_IPV6_ADDRESS: 207 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 208 /* invalid param size */ 209 return (NULL); 210 } 211 v6addr = (struct sctp_ipv6addr_param *)ph; 212 sin6 = &store.sin6; 213 bzero(sin6, sizeof(*sin6)); 214 sin6->sin6_family = AF_INET6; 215 sin6->sin6_len = sizeof(struct sockaddr_in6); 216 sin6->sin6_port = stcb->rport; 217 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 218 sizeof(struct in6_addr)); 219 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 220 bad_address = 1; 221 } 222 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 223 zero_address = 1; 224 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 225 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 226 break; 227#endif 228 default: 229 m_reply = sctp_asconf_error_response(aph->correlation_id, 230 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 231 aparam_length); 232 return (m_reply); 233 } /* end switch */ 234 235 /* if 0.0.0.0/::0, add the source address instead */ 236 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 237 sa = src; 238 SCTPDBG(SCTP_DEBUG_ASCONF1, 239 "process_asconf_add_ip: using source addr "); 240 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 241 } 242 /* add the address */ 243 if (bad_address) { 244 m_reply = sctp_asconf_error_response(aph->correlation_id, 245 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, 246 aparam_length); 247 } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE, 248 SCTP_ADDR_DYNAMIC_ADDED) != 0) { 249 SCTPDBG(SCTP_DEBUG_ASCONF1, 250 "process_asconf_add_ip: error adding address\n"); 251 m_reply = sctp_asconf_error_response(aph->correlation_id, 252 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph, 253 aparam_length); 254 } else { 255 /* notify upper layer */ 256 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 257 if (response_required) { 258 m_reply = 259 sctp_asconf_success_response(aph->correlation_id); 260 } 261 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); 262 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 263 stcb, net); 264 if (send_hb) { 265 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 266 } 267 } 268 return (m_reply); 269} 270 271static int 272sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 273{ 274 struct sctp_nets *src_net, *net; 275 276 /* make sure the source address exists as a destination net */ 277 src_net = sctp_findnet(stcb, src); 278 if (src_net == NULL) { 279 /* not found */ 280 return (-1); 281 } 282 /* delete all destination addresses except the source */ 283 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 284 if (net != src_net) { 285 /* delete this address */ 286 sctp_remove_net(stcb, net); 287 SCTPDBG(SCTP_DEBUG_ASCONF1, 288 "asconf_del_remote_addrs_except: deleting "); 289 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 290 (struct sockaddr *)&net->ro._l_addr); 291 /* notify upper layer */ 292 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 293 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 294 } 295 } 296 return (0); 297} 298 299static struct mbuf * 300sctp_process_asconf_delete_ip(struct sockaddr *src, 301 struct sctp_asconf_paramhdr *aph, 302 struct sctp_tcb *stcb, int response_required) 303{ 304 struct mbuf *m_reply = NULL; 305 union sctp_sockstore store; 306 struct sctp_paramhdr *ph; 307 uint16_t param_type, aparam_length; 308 309#if defined(INET) || defined(INET6) 310 uint16_t param_length; 311 312#endif 313 struct sockaddr *sa; 314 int zero_address = 0; 315 int result; 316 317#ifdef INET 318 struct sockaddr_in *sin; 319 struct sctp_ipv4addr_param *v4addr; 320 321#endif 322#ifdef INET6 323 struct sockaddr_in6 *sin6; 324 struct sctp_ipv6addr_param *v6addr; 325 326#endif 327 328 aparam_length = ntohs(aph->ph.param_length); 329 ph = (struct sctp_paramhdr *)(aph + 1); 330 param_type = ntohs(ph->param_type); 331#if defined(INET) || defined(INET6) 332 param_length = ntohs(ph->param_length); 333#endif 334 sa = &store.sa; 335 switch (param_type) { 336#ifdef INET 337 case SCTP_IPV4_ADDRESS: 338 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 339 /* invalid param size */ 340 return (NULL); 341 } 342 v4addr = (struct sctp_ipv4addr_param *)ph; 343 sin = &store.sin; 344 bzero(sin, sizeof(*sin)); 345 sin->sin_family = AF_INET; 346 sin->sin_len = sizeof(struct sockaddr_in); 347 sin->sin_port = stcb->rport; 348 sin->sin_addr.s_addr = v4addr->addr; 349 if (sin->sin_addr.s_addr == INADDR_ANY) 350 zero_address = 1; 351 SCTPDBG(SCTP_DEBUG_ASCONF1, 352 "process_asconf_delete_ip: deleting "); 353 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 354 break; 355#endif 356#ifdef INET6 357 case SCTP_IPV6_ADDRESS: 358 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 359 /* invalid param size */ 360 return (NULL); 361 } 362 v6addr = (struct sctp_ipv6addr_param *)ph; 363 sin6 = &store.sin6; 364 bzero(sin6, sizeof(*sin6)); 365 sin6->sin6_family = AF_INET6; 366 sin6->sin6_len = sizeof(struct sockaddr_in6); 367 sin6->sin6_port = stcb->rport; 368 memcpy(&sin6->sin6_addr, v6addr->addr, 369 sizeof(struct in6_addr)); 370 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 371 zero_address = 1; 372 SCTPDBG(SCTP_DEBUG_ASCONF1, 373 "process_asconf_delete_ip: deleting "); 374 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 375 break; 376#endif 377 default: 378 m_reply = sctp_asconf_error_response(aph->correlation_id, 379 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 380 aparam_length); 381 return (m_reply); 382 } 383 384 /* make sure the source address is not being deleted */ 385 if (sctp_cmpaddr(sa, src)) { 386 /* trying to delete the source address! */ 387 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 388 m_reply = sctp_asconf_error_response(aph->correlation_id, 389 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, 390 aparam_length); 391 return (m_reply); 392 } 393 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 394 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 395 result = sctp_asconf_del_remote_addrs_except(stcb, src); 396 397 if (result) { 398 /* src address did not exist? */ 399 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 400 /* what error to reply with?? */ 401 m_reply = 402 sctp_asconf_error_response(aph->correlation_id, 403 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, 404 aparam_length); 405 } else if (response_required) { 406 m_reply = 407 sctp_asconf_success_response(aph->correlation_id); 408 } 409 return (m_reply); 410 } 411 /* delete the address */ 412 result = sctp_del_remote_addr(stcb, sa); 413 /* 414 * note if result == -2, the address doesn't exist in the asoc but 415 * since it's being deleted anyways, we just ack the delete -- but 416 * this probably means something has already gone awry 417 */ 418 if (result == -1) { 419 /* only one address in the asoc */ 420 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 421 m_reply = sctp_asconf_error_response(aph->correlation_id, 422 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, 423 aparam_length); 424 } else { 425 if (response_required) { 426 m_reply = sctp_asconf_success_response(aph->correlation_id); 427 } 428 /* notify upper layer */ 429 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 430 } 431 return (m_reply); 432} 433 434static struct mbuf * 435sctp_process_asconf_set_primary(struct sockaddr *src, 436 struct sctp_asconf_paramhdr *aph, 437 struct sctp_tcb *stcb, int response_required) 438{ 439 struct mbuf *m_reply = NULL; 440 union sctp_sockstore store; 441 struct sctp_paramhdr *ph; 442 uint16_t param_type, aparam_length; 443 444#if defined(INET) || defined(INET6) 445 uint16_t param_length; 446 447#endif 448 struct sockaddr *sa; 449 int zero_address = 0; 450 451#ifdef INET 452 struct sockaddr_in *sin; 453 struct sctp_ipv4addr_param *v4addr; 454 455#endif 456#ifdef INET6 457 struct sockaddr_in6 *sin6; 458 struct sctp_ipv6addr_param *v6addr; 459 460#endif 461 462 aparam_length = ntohs(aph->ph.param_length); 463 ph = (struct sctp_paramhdr *)(aph + 1); 464 param_type = ntohs(ph->param_type); 465#if defined(INET) || defined(INET6) 466 param_length = ntohs(ph->param_length); 467#endif 468 sa = &store.sa; 469 switch (param_type) { 470#ifdef INET 471 case SCTP_IPV4_ADDRESS: 472 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 473 /* invalid param size */ 474 return (NULL); 475 } 476 v4addr = (struct sctp_ipv4addr_param *)ph; 477 sin = &store.sin; 478 bzero(sin, sizeof(*sin)); 479 sin->sin_family = AF_INET; 480 sin->sin_len = sizeof(struct sockaddr_in); 481 sin->sin_addr.s_addr = v4addr->addr; 482 if (sin->sin_addr.s_addr == INADDR_ANY) 483 zero_address = 1; 484 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 485 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 486 break; 487#endif 488#ifdef INET6 489 case SCTP_IPV6_ADDRESS: 490 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 491 /* invalid param size */ 492 return (NULL); 493 } 494 v6addr = (struct sctp_ipv6addr_param *)ph; 495 sin6 = &store.sin6; 496 bzero(sin6, sizeof(*sin6)); 497 sin6->sin6_family = AF_INET6; 498 sin6->sin6_len = sizeof(struct sockaddr_in6); 499 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 500 sizeof(struct in6_addr)); 501 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 502 zero_address = 1; 503 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 504 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 505 break; 506#endif 507 default: 508 m_reply = sctp_asconf_error_response(aph->correlation_id, 509 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 510 aparam_length); 511 return (m_reply); 512 } 513 514 /* if 0.0.0.0/::0, use the source address instead */ 515 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 516 sa = src; 517 SCTPDBG(SCTP_DEBUG_ASCONF1, 518 "process_asconf_set_primary: using source addr "); 519 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 520 } 521 /* set the primary address */ 522 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 523 SCTPDBG(SCTP_DEBUG_ASCONF1, 524 "process_asconf_set_primary: primary address set\n"); 525 /* notify upper layer */ 526 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 527 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && 528 (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && 529 (stcb->asoc.alternate)) { 530 sctp_free_remote_addr(stcb->asoc.alternate); 531 stcb->asoc.alternate = NULL; 532 } 533 if (response_required) { 534 m_reply = sctp_asconf_success_response(aph->correlation_id); 535 } 536 /* 537 * Mobility adaptation. Ideally, when the reception of SET 538 * PRIMARY with DELETE IP ADDRESS of the previous primary 539 * destination, unacknowledged DATA are retransmitted 540 * immediately to the new primary destination for seamless 541 * handover. If the destination is UNCONFIRMED and marked to 542 * REQ_PRIM, The retransmission occur when reception of the 543 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 544 * sctp_input.c) Also, when change of the primary 545 * destination, it is better that all subsequent new DATA 546 * containing already queued DATA are transmitted to the new 547 * primary destination. (by micchie) 548 */ 549 if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 550 SCTP_MOBILITY_BASE) || 551 sctp_is_mobility_feature_on(stcb->sctp_ep, 552 SCTP_MOBILITY_FASTHANDOFF)) && 553 sctp_is_mobility_feature_on(stcb->sctp_ep, 554 SCTP_MOBILITY_PRIM_DELETED) && 555 (stcb->asoc.primary_destination->dest_state & 556 SCTP_ADDR_UNCONFIRMED) == 0) { 557 558 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7); 559 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 560 SCTP_MOBILITY_FASTHANDOFF)) { 561 sctp_assoc_immediate_retrans(stcb, 562 stcb->asoc.primary_destination); 563 } 564 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 565 SCTP_MOBILITY_BASE)) { 566 sctp_move_chunks_from_net(stcb, 567 stcb->asoc.deleted_primary); 568 } 569 sctp_delete_prim_timer(stcb->sctp_ep, stcb, 570 stcb->asoc.deleted_primary); 571 } 572 } else { 573 /* couldn't set the requested primary address! */ 574 SCTPDBG(SCTP_DEBUG_ASCONF1, 575 "process_asconf_set_primary: set primary failed!\n"); 576 /* must have been an invalid address, so report */ 577 m_reply = sctp_asconf_error_response(aph->correlation_id, 578 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 579 aparam_length); 580 } 581 582 return (m_reply); 583} 584 585/* 586 * handles an ASCONF chunk. 587 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 588 */ 589void 590sctp_handle_asconf(struct mbuf *m, unsigned int offset, 591 struct sockaddr *src, 592 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 593 int first) 594{ 595 struct sctp_association *asoc; 596 uint32_t serial_num; 597 struct mbuf *n, *m_ack, *m_result, *m_tail; 598 struct sctp_asconf_ack_chunk *ack_cp; 599 struct sctp_asconf_paramhdr *aph, *ack_aph; 600 struct sctp_ipv6addr_param *p_addr; 601 unsigned int asconf_limit, cnt; 602 int error = 0; /* did an error occur? */ 603 604 /* asconf param buffer */ 605 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 606 struct sctp_asconf_ack *ack, *ack_next; 607 608 /* verify minimum length */ 609 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 610 SCTPDBG(SCTP_DEBUG_ASCONF1, 611 "handle_asconf: chunk too small = %xh\n", 612 ntohs(cp->ch.chunk_length)); 613 return; 614 } 615 asoc = &stcb->asoc; 616 serial_num = ntohl(cp->serial_number); 617 618 if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { 619 /* got a duplicate ASCONF */ 620 SCTPDBG(SCTP_DEBUG_ASCONF1, 621 "handle_asconf: got duplicate serial number = %xh\n", 622 serial_num); 623 return; 624 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 625 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 626 serial_num, asoc->asconf_seq_in + 1); 627 return; 628 } 629 /* it's the expected "next" sequence number, so process it */ 630 asoc->asconf_seq_in = serial_num; /* update sequence */ 631 /* get length of all the param's in the ASCONF */ 632 asconf_limit = offset + ntohs(cp->ch.chunk_length); 633 SCTPDBG(SCTP_DEBUG_ASCONF1, 634 "handle_asconf: asconf_limit=%u, sequence=%xh\n", 635 asconf_limit, serial_num); 636 637 if (first) { 638 /* delete old cache */ 639 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); 640 641 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { 642 if (ack->serial_number == serial_num) 643 break; 644 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 645 ack->serial_number, serial_num); 646 TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); 647 if (ack->data != NULL) { 648 sctp_m_freem(ack->data); 649 } 650 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 651 } 652 } 653 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 654 M_NOWAIT, 1, MT_DATA); 655 if (m_ack == NULL) { 656 SCTPDBG(SCTP_DEBUG_ASCONF1, 657 "handle_asconf: couldn't get mbuf!\n"); 658 return; 659 } 660 m_tail = m_ack; /* current reply chain's tail */ 661 662 /* fill in ASCONF-ACK header */ 663 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 664 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 665 ack_cp->ch.chunk_flags = 0; 666 ack_cp->serial_number = htonl(serial_num); 667 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 668 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 669 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 670 671 /* skip the lookup address parameter */ 672 offset += sizeof(struct sctp_asconf_chunk); 673 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 674 if (p_addr == NULL) { 675 SCTPDBG(SCTP_DEBUG_ASCONF1, 676 "handle_asconf: couldn't get lookup addr!\n"); 677 /* respond with a missing/invalid mandatory parameter error */ 678 return; 679 } 680 /* param_length is already validated in process_control... */ 681 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 682 683 /* get pointer to first asconf param in ASCONF-ACK */ 684 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk)); 685 if (ack_aph == NULL) { 686 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n"); 687 return; 688 } 689 /* get pointer to first asconf param in ASCONF */ 690 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 691 if (aph == NULL) { 692 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 693 goto send_reply; 694 } 695 /* process through all parameters */ 696 cnt = 0; 697 while (aph != NULL) { 698 unsigned int param_length, param_type; 699 700 param_type = ntohs(aph->ph.param_type); 701 param_length = ntohs(aph->ph.param_length); 702 if (offset + param_length > asconf_limit) { 703 /* parameter goes beyond end of chunk! */ 704 sctp_m_freem(m_ack); 705 return; 706 } 707 m_result = NULL; 708 709 if (param_length > sizeof(aparam_buf)) { 710 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 711 sctp_m_freem(m_ack); 712 return; 713 } 714 if (param_length <= sizeof(struct sctp_paramhdr)) { 715 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 716 sctp_m_freem(m_ack); 717 } 718 /* get the entire parameter */ 719 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 720 if (aph == NULL) { 721 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 722 sctp_m_freem(m_ack); 723 return; 724 } 725 switch (param_type) { 726 case SCTP_ADD_IP_ADDRESS: 727 m_result = sctp_process_asconf_add_ip(src, aph, stcb, 728 (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); 729 cnt++; 730 break; 731 case SCTP_DEL_IP_ADDRESS: 732 m_result = sctp_process_asconf_delete_ip(src, aph, stcb, 733 error); 734 break; 735 case SCTP_ERROR_CAUSE_IND: 736 /* not valid in an ASCONF chunk */ 737 break; 738 case SCTP_SET_PRIM_ADDR: 739 m_result = sctp_process_asconf_set_primary(src, aph, 740 stcb, error); 741 break; 742 case SCTP_NAT_VTAGS: 743 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 744 break; 745 case SCTP_SUCCESS_REPORT: 746 /* not valid in an ASCONF chunk */ 747 break; 748 case SCTP_ULP_ADAPTATION: 749 /* FIX */ 750 break; 751 default: 752 if ((param_type & 0x8000) == 0) { 753 /* Been told to STOP at this param */ 754 asconf_limit = offset; 755 /* 756 * FIX FIX - We need to call 757 * sctp_arethere_unrecognized_parameters() 758 * to get a operr and send it for any 759 * param's with the 0x4000 bit set OR do it 760 * here ourselves... note we still must STOP 761 * if the 0x8000 bit is clear. 762 */ 763 } 764 /* unknown/invalid param type */ 765 break; 766 } /* switch */ 767 768 /* add any (error) result to the reply mbuf chain */ 769 if (m_result != NULL) { 770 SCTP_BUF_NEXT(m_tail) = m_result; 771 m_tail = m_result; 772 /* update lengths, make sure it's aligned too */ 773 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 774 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 775 /* set flag to force success reports */ 776 error = 1; 777 } 778 offset += SCTP_SIZE32(param_length); 779 /* update remaining ASCONF message length to process */ 780 if (offset >= asconf_limit) { 781 /* no more data in the mbuf chain */ 782 break; 783 } 784 /* get pointer to next asconf param */ 785 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 786 sizeof(struct sctp_asconf_paramhdr), 787 (uint8_t *) & aparam_buf); 788 if (aph == NULL) { 789 /* can't get an asconf paramhdr */ 790 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 791 /* FIX ME - add error here... */ 792 } 793 } 794 795send_reply: 796 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 797 /* save the ASCONF-ACK reply */ 798 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 799 struct sctp_asconf_ack); 800 if (ack == NULL) { 801 sctp_m_freem(m_ack); 802 return; 803 } 804 ack->serial_number = serial_num; 805 ack->last_sent_to = NULL; 806 ack->data = m_ack; 807 ack->len = 0; 808 for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { 809 ack->len += SCTP_BUF_LEN(n); 810 } 811 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 812 813 /* see if last_control_chunk_from is set properly (use IP src addr) */ 814 if (stcb->asoc.last_control_chunk_from == NULL) { 815 /* 816 * this could happen if the source address was just newly 817 * added 818 */ 819 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 820 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 821 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); 822 /* look up the from address */ 823 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); 824#ifdef SCTP_DEBUG 825 if (stcb->asoc.last_control_chunk_from == NULL) { 826 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 827 } 828#endif 829 } 830} 831 832/* 833 * does the address match? returns 0 if not, 1 if so 834 */ 835static uint32_t 836sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 837{ 838 switch (sa->sa_family) { 839#ifdef INET6 840 case AF_INET6: 841 { 842 /* XXX scopeid */ 843 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 844 845 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 846 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 847 sizeof(struct in6_addr)) == 0)) { 848 return (1); 849 } 850 break; 851 } 852#endif 853#ifdef INET 854 case AF_INET: 855 { 856 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 857 858 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 859 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 860 sizeof(struct in_addr)) == 0)) { 861 return (1); 862 } 863 break; 864 } 865#endif 866 default: 867 break; 868 } 869 return (0); 870} 871 872/* 873 * does the address match? returns 0 if not, 1 if so 874 */ 875static uint32_t 876sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) 877{ 878#if defined(INET) || defined(INET6) 879 uint16_t param_type, param_length; 880 881 param_type = ntohs(ph->param_type); 882 param_length = ntohs(ph->param_length); 883#endif 884 switch (sa->sa_family) { 885#ifdef INET6 886 case AF_INET6: 887 { 888 /* XXX scopeid */ 889 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 890 struct sctp_ipv6addr_param *v6addr; 891 892 v6addr = (struct sctp_ipv6addr_param *)ph; 893 if ((param_type == SCTP_IPV6_ADDRESS) && 894 (param_length == sizeof(struct sctp_ipv6addr_param)) && 895 (memcmp(&v6addr->addr, &sin6->sin6_addr, 896 sizeof(struct in6_addr)) == 0)) { 897 return (1); 898 } 899 break; 900 } 901#endif 902#ifdef INET 903 case AF_INET: 904 { 905 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 906 struct sctp_ipv4addr_param *v4addr; 907 908 v4addr = (struct sctp_ipv4addr_param *)ph; 909 if ((param_type == SCTP_IPV4_ADDRESS) && 910 (param_length == sizeof(struct sctp_ipv4addr_param)) && 911 (memcmp(&v4addr->addr, &sin->sin_addr, 912 sizeof(struct in_addr)) == 0)) { 913 return (1); 914 } 915 break; 916 } 917#endif 918 default: 919 break; 920 } 921 return (0); 922} 923 924/* 925 * Cleanup for non-responded/OP ERR'd ASCONF 926 */ 927void 928sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 929{ 930 /* 931 * clear out any existing asconfs going out 932 */ 933 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 934 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 935 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 936 /* remove the old ASCONF on our outbound queue */ 937 sctp_toss_old_asconf(stcb); 938} 939 940/* 941 * cleanup any cached source addresses that may be topologically 942 * incorrect after a new address has been added to this interface. 943 */ 944static void 945sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 946{ 947 struct sctp_nets *net; 948 949 /* 950 * Ideally, we want to only clear cached routes and source addresses 951 * that are topologically incorrect. But since there is no easy way 952 * to know whether the newly added address on the ifn would cause a 953 * routing change (i.e. a new egress interface would be chosen) 954 * without doing a new routing lookup and source address selection, 955 * we will (for now) just flush any cached route using a different 956 * ifn (and cached source addrs) and let output re-choose them 957 * during the next send on that net. 958 */ 959 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 960 /* 961 * clear any cached route (and cached source address) if the 962 * route's interface is NOT the same as the address change. 963 * If it's the same interface, just clear the cached source 964 * address. 965 */ 966 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 967 ((ifn == NULL) || 968 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { 969 /* clear any cached route */ 970 RTFREE(net->ro.ro_rt); 971 net->ro.ro_rt = NULL; 972 } 973 /* clear any cached source address */ 974 if (net->src_addr_selected) { 975 sctp_free_ifa(net->ro._s_addr); 976 net->ro._s_addr = NULL; 977 net->src_addr_selected = 0; 978 } 979 } 980} 981 982 983void 984sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 985{ 986 int error; 987 988 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 989 return; 990 } 991 if (stcb->asoc.deleted_primary == NULL) { 992 return; 993 } 994 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 995 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 996 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 997 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 998 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 999 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 1000 stcb->asoc.deleted_primary, 1001 SCTP_FROM_SCTP_TIMER + SCTP_LOC_8); 1002 stcb->asoc.num_send_timers_up--; 1003 if (stcb->asoc.num_send_timers_up < 0) { 1004 stcb->asoc.num_send_timers_up = 0; 1005 } 1006 SCTP_TCB_LOCK_ASSERT(stcb); 1007 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1008 stcb->asoc.deleted_primary); 1009 if (error) { 1010 SCTP_INP_DECR_REF(stcb->sctp_ep); 1011 return; 1012 } 1013 SCTP_TCB_LOCK_ASSERT(stcb); 1014#ifdef SCTP_AUDITING_ENABLED 1015 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); 1016#endif 1017 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1018 if ((stcb->asoc.num_send_timers_up == 0) && 1019 (stcb->asoc.sent_queue_cnt > 0)) { 1020 struct sctp_tmit_chunk *chk; 1021 1022 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1023 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1024 stcb, chk->whoTo); 1025 } 1026 } 1027 return; 1028} 1029 1030static int 1031 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1032 1033void 1034sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1035{ 1036 struct sctp_tmit_chunk *chk; 1037 1038 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1039 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1040 SCTP_FROM_SCTP_TIMER + SCTP_LOC_5); 1041 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1042 net->error_count = 0; 1043 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1044 if (chk->whoTo == net) { 1045 if (chk->sent < SCTP_DATAGRAM_RESEND) { 1046 chk->sent = SCTP_DATAGRAM_RESEND; 1047 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1048 sctp_flight_size_decrease(chk); 1049 sctp_total_flight_decrease(stcb, chk); 1050 net->marked_retrans++; 1051 stcb->asoc.marked_retrans++; 1052 } 1053 } 1054 } 1055 if (net->marked_retrans) { 1056 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1057 } 1058} 1059 1060static void 1061sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1062{ 1063 struct sctp_nets *net; 1064 int addrnum, changed; 1065 1066 /* 1067 * If number of local valid addresses is 1, the valid address is 1068 * probably newly added address. Several valid addresses in this 1069 * association. A source address may not be changed. Additionally, 1070 * they can be configured on a same interface as "alias" addresses. 1071 * (by micchie) 1072 */ 1073 addrnum = sctp_local_addr_count(stcb); 1074 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1075 addrnum); 1076 if (addrnum == 1) { 1077 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1078 /* clear any cached route and source address */ 1079 if (net->ro.ro_rt) { 1080 RTFREE(net->ro.ro_rt); 1081 net->ro.ro_rt = NULL; 1082 } 1083 if (net->src_addr_selected) { 1084 sctp_free_ifa(net->ro._s_addr); 1085 net->ro._s_addr = NULL; 1086 net->src_addr_selected = 0; 1087 } 1088 /* Retransmit unacknowledged DATA chunks immediately */ 1089 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1090 SCTP_MOBILITY_FASTHANDOFF)) { 1091 sctp_net_immediate_retrans(stcb, net); 1092 } 1093 /* also, SET PRIMARY is maybe already sent */ 1094 } 1095 return; 1096 } 1097 /* Multiple local addresses exsist in the association. */ 1098 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1099 /* clear any cached route and source address */ 1100 if (net->ro.ro_rt) { 1101 RTFREE(net->ro.ro_rt); 1102 net->ro.ro_rt = NULL; 1103 } 1104 if (net->src_addr_selected) { 1105 sctp_free_ifa(net->ro._s_addr); 1106 net->ro._s_addr = NULL; 1107 net->src_addr_selected = 0; 1108 } 1109 /* 1110 * Check if the nexthop is corresponding to the new address. 1111 * If the new address is corresponding to the current 1112 * nexthop, the path will be changed. If the new address is 1113 * NOT corresponding to the current nexthop, the path will 1114 * not be changed. 1115 */ 1116 SCTP_RTALLOC((sctp_route_t *) & net->ro, 1117 stcb->sctp_ep->def_vrf_id); 1118 if (net->ro.ro_rt == NULL) 1119 continue; 1120 1121 changed = 0; 1122 switch (net->ro._l_addr.sa.sa_family) { 1123#ifdef INET 1124 case AF_INET: 1125 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) { 1126 changed = 1; 1127 } 1128 break; 1129#endif 1130#ifdef INET6 1131 case AF_INET6: 1132 if (sctp_v6src_match_nexthop( 1133 &newifa->address.sin6, (sctp_route_t *) & net->ro)) { 1134 changed = 1; 1135 } 1136 break; 1137#endif 1138 default: 1139 break; 1140 } 1141 /* 1142 * if the newly added address does not relate routing 1143 * information, we skip. 1144 */ 1145 if (changed == 0) 1146 continue; 1147 /* Retransmit unacknowledged DATA chunks immediately */ 1148 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1149 SCTP_MOBILITY_FASTHANDOFF)) { 1150 sctp_net_immediate_retrans(stcb, net); 1151 } 1152 /* Send SET PRIMARY for this new address */ 1153 if (net == stcb->asoc.primary_destination) { 1154 (void)sctp_asconf_queue_mgmt(stcb, newifa, 1155 SCTP_SET_PRIM_ADDR); 1156 } 1157 } 1158} 1159 1160/* 1161 * process an ADD/DELETE IP ack from peer. 1162 * addr: corresponding sctp_ifa to the address being added/deleted. 1163 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1164 * flag: 1=success, 0=failure. 1165 */ 1166static void 1167sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) 1168{ 1169 /* 1170 * do the necessary asoc list work- if we get a failure indication, 1171 * leave the address on the assoc's restricted list. If we get a 1172 * success indication, remove the address from the restricted list. 1173 */ 1174 /* 1175 * Note: this will only occur for ADD_IP_ADDRESS, since 1176 * DEL_IP_ADDRESS is never actually added to the list... 1177 */ 1178 if (flag) { 1179 /* success case, so remove from the restricted list */ 1180 sctp_del_local_addr_restricted(stcb, addr); 1181 1182 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1183 SCTP_MOBILITY_BASE) || 1184 sctp_is_mobility_feature_on(stcb->sctp_ep, 1185 SCTP_MOBILITY_FASTHANDOFF)) { 1186 sctp_path_check_and_react(stcb, addr); 1187 return; 1188 } 1189 /* clear any cached/topologically incorrect source addresses */ 1190 sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1191 } 1192 /* else, leave it on the list */ 1193} 1194 1195/* 1196 * add an asconf add/delete/set primary IP address parameter to the queue. 1197 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1198 * returns 0 if queued, -1 if not queued/removed. 1199 * NOTE: if adding, but a delete for the same address is already scheduled 1200 * (and not yet sent out), simply remove it from queue. Same for deleting 1201 * an address already scheduled for add. If a duplicate operation is found, 1202 * ignore the new one. 1203 */ 1204static int 1205sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1206 uint16_t type) 1207{ 1208 struct sctp_asconf_addr *aa, *aa_next; 1209 1210 /* make sure the request isn't already in the queue */ 1211 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1212 /* address match? */ 1213 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1214 continue; 1215 /* 1216 * is the request already in queue but not sent? pass the 1217 * request already sent in order to resolve the following 1218 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1219 * can't remove the ADD request already sent 3. arrival of 1220 * ADD 1221 */ 1222 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1223 return (-1); 1224 } 1225 /* is the negative request already in queue, and not sent */ 1226 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1227 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1228 /* add requested, delete already queued */ 1229 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1230 /* remove the ifa from the restricted list */ 1231 sctp_del_local_addr_restricted(stcb, ifa); 1232 /* free the asconf param */ 1233 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1234 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1235 return (-1); 1236 } 1237 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1238 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1239 /* delete requested, add already queued */ 1240 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1241 /* remove the aa->ifa from the restricted list */ 1242 sctp_del_local_addr_restricted(stcb, aa->ifa); 1243 /* free the asconf param */ 1244 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1245 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1246 return (-1); 1247 } 1248 } /* for each aa */ 1249 1250 /* adding new request to the queue */ 1251 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1252 SCTP_M_ASC_ADDR); 1253 if (aa == NULL) { 1254 /* didn't get memory */ 1255 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1256 return (-1); 1257 } 1258 aa->special_del = 0; 1259 /* fill in asconf address parameter fields */ 1260 /* top level elements are "networked" during send */ 1261 aa->ap.aph.ph.param_type = type; 1262 aa->ifa = ifa; 1263 atomic_add_int(&ifa->refcount, 1); 1264 /* correlation_id filled in during send routine later... */ 1265 switch (ifa->address.sa.sa_family) { 1266#ifdef INET6 1267 case AF_INET6: 1268 { 1269 struct sockaddr_in6 *sin6; 1270 1271 sin6 = &ifa->address.sin6; 1272 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1273 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1274 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1275 sizeof(struct sctp_ipv6addr_param); 1276 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1277 sizeof(struct in6_addr)); 1278 break; 1279 } 1280#endif 1281#ifdef INET 1282 case AF_INET: 1283 { 1284 struct sockaddr_in *sin; 1285 1286 sin = &ifa->address.sin; 1287 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1288 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1289 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1290 sizeof(struct sctp_ipv4addr_param); 1291 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1292 sizeof(struct in_addr)); 1293 break; 1294 } 1295#endif 1296 default: 1297 /* invalid family! */ 1298 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1299 sctp_free_ifa(ifa); 1300 return (-1); 1301 } 1302 aa->sent = 0; /* clear sent flag */ 1303 1304 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1305#ifdef SCTP_DEBUG 1306 if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { 1307 if (type == SCTP_ADD_IP_ADDRESS) { 1308 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1309 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1310 } else if (type == SCTP_DEL_IP_ADDRESS) { 1311 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1312 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1313 } else { 1314 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1315 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); 1316 } 1317 } 1318#endif 1319 1320 return (0); 1321} 1322 1323 1324/* 1325 * add an asconf operation for the given ifa and type. 1326 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1327 * returns 0 if completed, -1 if not completed, 1 if immediate send is 1328 * advisable. 1329 */ 1330static int 1331sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1332 uint16_t type) 1333{ 1334 uint32_t status; 1335 int pending_delete_queued = 0; 1336 1337 /* see if peer supports ASCONF */ 1338 if (stcb->asoc.asconf_supported == 0) { 1339 return (-1); 1340 } 1341 /* 1342 * if this is deleting the last address from the assoc, mark it as 1343 * pending. 1344 */ 1345 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending && 1346 (sctp_local_addr_count(stcb) < 2)) { 1347 /* set the pending delete info only */ 1348 stcb->asoc.asconf_del_pending = 1; 1349 stcb->asoc.asconf_addr_del_pending = ifa; 1350 atomic_add_int(&ifa->refcount, 1); 1351 SCTPDBG(SCTP_DEBUG_ASCONF2, 1352 "asconf_queue_add: mark delete last address pending\n"); 1353 return (-1); 1354 } 1355 /* queue an asconf parameter */ 1356 status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1357 1358 /* 1359 * if this is an add, and there is a delete also pending (i.e. the 1360 * last local address is being changed), queue the pending delete 1361 * too. 1362 */ 1363 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1364 /* queue in the pending delete */ 1365 if (sctp_asconf_queue_mgmt(stcb, 1366 stcb->asoc.asconf_addr_del_pending, 1367 SCTP_DEL_IP_ADDRESS) == 0) { 1368 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1369 pending_delete_queued = 1; 1370 /* clear out the pending delete info */ 1371 stcb->asoc.asconf_del_pending = 0; 1372 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1373 stcb->asoc.asconf_addr_del_pending = NULL; 1374 } 1375 } 1376 if (pending_delete_queued) { 1377 struct sctp_nets *net; 1378 1379 /* 1380 * since we know that the only/last address is now being 1381 * changed in this case, reset the cwnd/rto on all nets to 1382 * start as a new address and path. Also clear the error 1383 * counts to give the assoc the best chance to complete the 1384 * address change. 1385 */ 1386 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1387 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1388 net); 1389 net->RTO = 0; 1390 net->error_count = 0; 1391 } 1392 stcb->asoc.overall_error_count = 0; 1393 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1394 sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1395 stcb->asoc.overall_error_count, 1396 0, 1397 SCTP_FROM_SCTP_ASCONF, 1398 __LINE__); 1399 } 1400 /* queue in an advisory set primary too */ 1401 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1402 /* let caller know we should send this out immediately */ 1403 status = 1; 1404 } 1405 return (status); 1406} 1407 1408/*- 1409 * add an asconf delete IP address parameter to the queue by sockaddr and 1410 * possibly with no sctp_ifa available. This is only called by the routine 1411 * that checks the addresses in an INIT-ACK against the current address list. 1412 * returns 0 if completed, non-zero if not completed. 1413 * NOTE: if an add is already scheduled (and not yet sent out), simply 1414 * remove it from queue. If a duplicate operation is found, ignore the 1415 * new one. 1416 */ 1417static int 1418sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1419{ 1420 struct sctp_ifa *ifa; 1421 struct sctp_asconf_addr *aa, *aa_next; 1422 1423 if (stcb == NULL) { 1424 return (-1); 1425 } 1426 /* see if peer supports ASCONF */ 1427 if (stcb->asoc.asconf_supported == 0) { 1428 return (-1); 1429 } 1430 /* make sure the request isn't already in the queue */ 1431 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1432 /* address match? */ 1433 if (sctp_asconf_addr_match(aa, sa) == 0) 1434 continue; 1435 /* is the request already in queue (sent or not) */ 1436 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1437 return (-1); 1438 } 1439 /* is the negative request already in queue, and not sent */ 1440 if (aa->sent == 1) 1441 continue; 1442 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1443 /* add already queued, so remove existing entry */ 1444 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1445 sctp_del_local_addr_restricted(stcb, aa->ifa); 1446 /* free the entry */ 1447 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1448 return (-1); 1449 } 1450 } /* for each aa */ 1451 1452 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1453 ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); 1454 1455 /* adding new request to the queue */ 1456 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1457 SCTP_M_ASC_ADDR); 1458 if (aa == NULL) { 1459 /* didn't get memory */ 1460 SCTPDBG(SCTP_DEBUG_ASCONF1, 1461 "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1462 return (-1); 1463 } 1464 aa->special_del = 0; 1465 /* fill in asconf address parameter fields */ 1466 /* top level elements are "networked" during send */ 1467 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1468 aa->ifa = ifa; 1469 if (ifa) 1470 atomic_add_int(&ifa->refcount, 1); 1471 /* correlation_id filled in during send routine later... */ 1472 switch (sa->sa_family) { 1473#ifdef INET6 1474 case AF_INET6: 1475 { 1476 /* IPv6 address */ 1477 struct sockaddr_in6 *sin6; 1478 1479 sin6 = (struct sockaddr_in6 *)sa; 1480 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1481 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1482 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1483 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1484 sizeof(struct in6_addr)); 1485 break; 1486 } 1487#endif 1488#ifdef INET 1489 case AF_INET: 1490 { 1491 /* IPv4 address */ 1492 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1493 1494 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1495 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1496 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1497 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1498 sizeof(struct in_addr)); 1499 break; 1500 } 1501#endif 1502 default: 1503 /* invalid family! */ 1504 SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1505 if (ifa) 1506 sctp_free_ifa(ifa); 1507 return (-1); 1508 } 1509 aa->sent = 0; /* clear sent flag */ 1510 1511 /* delete goes to the back of the queue */ 1512 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1513 1514 /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1515 return (0); 1516} 1517 1518/* 1519 * find a specific asconf param on our "sent" queue 1520 */ 1521static struct sctp_asconf_addr * 1522sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1523{ 1524 struct sctp_asconf_addr *aa; 1525 1526 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1527 if (aa->ap.aph.correlation_id == correlation_id && 1528 aa->sent == 1) { 1529 /* found it */ 1530 return (aa); 1531 } 1532 } 1533 /* didn't find it */ 1534 return (NULL); 1535} 1536 1537/* 1538 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1539 * notifications based on the error response 1540 */ 1541static void 1542sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, 1543 struct sctp_asconf_paramhdr *aph) 1544{ 1545 struct sctp_error_cause *eh; 1546 struct sctp_paramhdr *ph; 1547 uint16_t param_type; 1548 uint16_t error_code; 1549 1550 eh = (struct sctp_error_cause *)(aph + 1); 1551 ph = (struct sctp_paramhdr *)(eh + 1); 1552 /* validate lengths */ 1553 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1554 htons(aph->ph.param_length)) { 1555 /* invalid error cause length */ 1556 SCTPDBG(SCTP_DEBUG_ASCONF1, 1557 "asconf_process_error: cause element too long\n"); 1558 return; 1559 } 1560 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1561 htons(eh->length)) { 1562 /* invalid included TLV length */ 1563 SCTPDBG(SCTP_DEBUG_ASCONF1, 1564 "asconf_process_error: included TLV too long\n"); 1565 return; 1566 } 1567 /* which error code ? */ 1568 error_code = ntohs(eh->code); 1569 param_type = ntohs(aph->ph.param_type); 1570 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1571 switch (error_code) { 1572 case SCTP_CAUSE_RESOURCE_SHORTAGE: 1573 /* we allow ourselves to "try again" for this error */ 1574 break; 1575 default: 1576 /* peer can't handle it... */ 1577 switch (param_type) { 1578 case SCTP_ADD_IP_ADDRESS: 1579 case SCTP_DEL_IP_ADDRESS: 1580 case SCTP_SET_PRIM_ADDR: 1581 break; 1582 default: 1583 break; 1584 } 1585 } 1586} 1587 1588/* 1589 * process an asconf queue param. 1590 * aparam: parameter to process, will be removed from the queue. 1591 * flag: 1=success case, 0=failure case 1592 */ 1593static void 1594sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1595 struct sctp_asconf_addr *aparam, uint32_t flag) 1596{ 1597 uint16_t param_type; 1598 1599 /* process this param */ 1600 param_type = aparam->ap.aph.ph.param_type; 1601 switch (param_type) { 1602 case SCTP_ADD_IP_ADDRESS: 1603 SCTPDBG(SCTP_DEBUG_ASCONF1, 1604 "process_param_ack: added IP address\n"); 1605 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); 1606 break; 1607 case SCTP_DEL_IP_ADDRESS: 1608 SCTPDBG(SCTP_DEBUG_ASCONF1, 1609 "process_param_ack: deleted IP address\n"); 1610 /* nothing really to do... lists already updated */ 1611 break; 1612 case SCTP_SET_PRIM_ADDR: 1613 SCTPDBG(SCTP_DEBUG_ASCONF1, 1614 "process_param_ack: set primary IP address\n"); 1615 /* nothing to do... peer may start using this addr */ 1616 break; 1617 default: 1618 /* should NEVER happen */ 1619 break; 1620 } 1621 1622 /* remove the param and free it */ 1623 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1624 if (aparam->ifa) 1625 sctp_free_ifa(aparam->ifa); 1626 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1627} 1628 1629/* 1630 * cleanup from a bad asconf ack parameter 1631 */ 1632static void 1633sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) 1634{ 1635 /* assume peer doesn't really know how to do asconfs */ 1636 /* XXX we could free the pending queue here */ 1637 1638} 1639 1640void 1641sctp_handle_asconf_ack(struct mbuf *m, int offset, 1642 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1643 struct sctp_nets *net, int *abort_no_unlock) 1644{ 1645 struct sctp_association *asoc; 1646 uint32_t serial_num; 1647 uint16_t ack_length; 1648 struct sctp_asconf_paramhdr *aph; 1649 struct sctp_asconf_addr *aa, *aa_next; 1650 uint32_t last_error_id = 0; /* last error correlation id */ 1651 uint32_t id; 1652 struct sctp_asconf_addr *ap; 1653 1654 /* asconf param buffer */ 1655 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1656 1657 /* verify minimum length */ 1658 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1659 SCTPDBG(SCTP_DEBUG_ASCONF1, 1660 "handle_asconf_ack: chunk too small = %xh\n", 1661 ntohs(cp->ch.chunk_length)); 1662 return; 1663 } 1664 asoc = &stcb->asoc; 1665 serial_num = ntohl(cp->serial_number); 1666 1667 /* 1668 * NOTE: we may want to handle this differently- currently, we will 1669 * abort when we get an ack for the expected serial number + 1 (eg. 1670 * we didn't send it), process an ack normally if it is the expected 1671 * serial number, and re-send the previous ack for *ALL* other 1672 * serial numbers 1673 */ 1674 1675 /* 1676 * if the serial number is the next expected, but I didn't send it, 1677 * abort the asoc, since someone probably just hijacked us... 1678 */ 1679 if (serial_num == (asoc->asconf_seq_out + 1)) { 1680 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1681 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED); 1682 *abort_no_unlock = 1; 1683 return; 1684 } 1685 if (serial_num != asoc->asconf_seq_out_acked + 1) { 1686 /* got a duplicate/unexpected ASCONF-ACK */ 1687 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1688 serial_num, asoc->asconf_seq_out_acked + 1); 1689 return; 1690 } 1691 if (serial_num == asoc->asconf_seq_out - 1) { 1692 /* stop our timer */ 1693 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1694 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1695 } 1696 /* process the ASCONF-ACK contents */ 1697 ack_length = ntohs(cp->ch.chunk_length) - 1698 sizeof(struct sctp_asconf_ack_chunk); 1699 offset += sizeof(struct sctp_asconf_ack_chunk); 1700 /* process through all parameters */ 1701 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1702 unsigned int param_length, param_type; 1703 1704 /* get pointer to next asconf parameter */ 1705 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1706 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1707 if (aph == NULL) { 1708 /* can't get an asconf paramhdr */ 1709 sctp_asconf_ack_clear(stcb); 1710 return; 1711 } 1712 param_type = ntohs(aph->ph.param_type); 1713 param_length = ntohs(aph->ph.param_length); 1714 if (param_length > ack_length) { 1715 sctp_asconf_ack_clear(stcb); 1716 return; 1717 } 1718 if (param_length < sizeof(struct sctp_paramhdr)) { 1719 sctp_asconf_ack_clear(stcb); 1720 return; 1721 } 1722 /* get the complete parameter... */ 1723 if (param_length > sizeof(aparam_buf)) { 1724 SCTPDBG(SCTP_DEBUG_ASCONF1, 1725 "param length (%u) larger than buffer size!\n", param_length); 1726 sctp_asconf_ack_clear(stcb); 1727 return; 1728 } 1729 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1730 if (aph == NULL) { 1731 sctp_asconf_ack_clear(stcb); 1732 return; 1733 } 1734 /* correlation_id is transparent to peer, no ntohl needed */ 1735 id = aph->correlation_id; 1736 1737 switch (param_type) { 1738 case SCTP_ERROR_CAUSE_IND: 1739 last_error_id = id; 1740 /* find the corresponding asconf param in our queue */ 1741 ap = sctp_asconf_find_param(stcb, id); 1742 if (ap == NULL) { 1743 /* hmm... can't find this in our queue! */ 1744 break; 1745 } 1746 /* process the parameter, failed flag */ 1747 sctp_asconf_process_param_ack(stcb, ap, 0); 1748 /* process the error response */ 1749 sctp_asconf_process_error(stcb, aph); 1750 break; 1751 case SCTP_SUCCESS_REPORT: 1752 /* find the corresponding asconf param in our queue */ 1753 ap = sctp_asconf_find_param(stcb, id); 1754 if (ap == NULL) { 1755 /* hmm... can't find this in our queue! */ 1756 break; 1757 } 1758 /* process the parameter, success flag */ 1759 sctp_asconf_process_param_ack(stcb, ap, 1); 1760 break; 1761 default: 1762 break; 1763 } /* switch */ 1764 1765 /* update remaining ASCONF-ACK message length to process */ 1766 ack_length -= SCTP_SIZE32(param_length); 1767 if (ack_length <= 0) { 1768 /* no more data in the mbuf chain */ 1769 break; 1770 } 1771 offset += SCTP_SIZE32(param_length); 1772 } /* while */ 1773 1774 /* 1775 * if there are any "sent" params still on the queue, these are 1776 * implicitly "success", or "failed" (if we got an error back) ... 1777 * so process these appropriately 1778 * 1779 * we assume that the correlation_id's are monotonically increasing 1780 * beginning from 1 and that we don't have *that* many outstanding 1781 * at any given time 1782 */ 1783 if (last_error_id == 0) 1784 last_error_id--;/* set to "max" value */ 1785 TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { 1786 if (aa->sent == 1) { 1787 /* 1788 * implicitly successful or failed if correlation_id 1789 * < last_error_id, then success else, failure 1790 */ 1791 if (aa->ap.aph.correlation_id < last_error_id) 1792 sctp_asconf_process_param_ack(stcb, aa, 1); 1793 else 1794 sctp_asconf_process_param_ack(stcb, aa, 0); 1795 } else { 1796 /* 1797 * since we always process in order (FIFO queue) if 1798 * we reach one that hasn't been sent, the rest 1799 * should not have been sent either. so, we're 1800 * done... 1801 */ 1802 break; 1803 } 1804 } 1805 1806 /* update the next sequence number to use */ 1807 asoc->asconf_seq_out_acked++; 1808 /* remove the old ASCONF on our outbound queue */ 1809 sctp_toss_old_asconf(stcb); 1810 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1811#ifdef SCTP_TIMER_BASED_ASCONF 1812 /* we have more params, so restart our timer */ 1813 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1814 stcb, net); 1815#else 1816 /* we have more params, so send out more */ 1817 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1818#endif 1819 } 1820} 1821 1822#ifdef INET6 1823static uint32_t 1824sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1825{ 1826 struct sockaddr_in6 *sin6, *net6; 1827 struct sctp_nets *net; 1828 1829 if (sa->sa_family != AF_INET6) { 1830 /* wrong family */ 1831 return (0); 1832 } 1833 sin6 = (struct sockaddr_in6 *)sa; 1834 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1835 /* not link local address */ 1836 return (0); 1837 } 1838 /* hunt through our destination nets list for this scope_id */ 1839 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1840 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1841 AF_INET6) 1842 continue; 1843 net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1844 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1845 continue; 1846 if (sctp_is_same_scope(sin6, net6)) { 1847 /* found one */ 1848 return (1); 1849 } 1850 } 1851 /* didn't find one */ 1852 return (0); 1853} 1854 1855#endif 1856 1857/* 1858 * address management functions 1859 */ 1860static void 1861sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1862 struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1863{ 1864 int status; 1865 1866 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || 1867 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1868 /* subset bound, no ASCONF allowed case, so ignore */ 1869 return; 1870 } 1871 /* 1872 * note: we know this is not the subset bound, no ASCONF case eg. 1873 * this is boundall or subset bound w/ASCONF allowed 1874 */ 1875 1876 /* first, make sure that the address is IPv4 or IPv6 and not jailed */ 1877 switch (ifa->address.sa.sa_family) { 1878#ifdef INET6 1879 case AF_INET6: 1880 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1881 &ifa->address.sin6.sin6_addr) != 0) { 1882 return; 1883 } 1884 break; 1885#endif 1886#ifdef INET 1887 case AF_INET: 1888 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1889 &ifa->address.sin.sin_addr) != 0) { 1890 return; 1891 } 1892 break; 1893#endif 1894 default: 1895 return; 1896 } 1897#ifdef INET6 1898 /* make sure we're "allowed" to add this type of addr */ 1899 if (ifa->address.sa.sa_family == AF_INET6) { 1900 /* invalid if we're not a v6 endpoint */ 1901 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1902 return; 1903 /* is the v6 addr really valid ? */ 1904 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1905 return; 1906 } 1907 } 1908#endif 1909 /* put this address on the "pending/do not use yet" list */ 1910 sctp_add_local_addr_restricted(stcb, ifa); 1911 /* 1912 * check address scope if address is out of scope, don't queue 1913 * anything... note: this would leave the address on both inp and 1914 * asoc lists 1915 */ 1916 switch (ifa->address.sa.sa_family) { 1917#ifdef INET6 1918 case AF_INET6: 1919 { 1920 struct sockaddr_in6 *sin6; 1921 1922 sin6 = &ifa->address.sin6; 1923 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1924 /* we skip unspecifed addresses */ 1925 return; 1926 } 1927 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1928 if (stcb->asoc.scope.local_scope == 0) { 1929 return; 1930 } 1931 /* is it the right link local scope? */ 1932 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1933 return; 1934 } 1935 } 1936 if (stcb->asoc.scope.site_scope == 0 && 1937 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1938 return; 1939 } 1940 break; 1941 } 1942#endif 1943#ifdef INET 1944 case AF_INET: 1945 { 1946 struct sockaddr_in *sin; 1947 struct in6pcb *inp6; 1948 1949 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1950 /* invalid if we are a v6 only endpoint */ 1951 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1952 SCTP_IPV6_V6ONLY(inp6)) 1953 return; 1954 1955 sin = &ifa->address.sin; 1956 if (sin->sin_addr.s_addr == 0) { 1957 /* we skip unspecifed addresses */ 1958 return; 1959 } 1960 if (stcb->asoc.scope.ipv4_local_scope == 0 && 1961 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1962 return; 1963 } 1964 break; 1965 } 1966#endif 1967 default: 1968 /* else, not AF_INET or AF_INET6, so skip */ 1969 return; 1970 } 1971 1972 /* queue an asconf for this address add/delete */ 1973 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1974 /* does the peer do asconf? */ 1975 if (stcb->asoc.asconf_supported) { 1976 /* queue an asconf for this addr */ 1977 status = sctp_asconf_queue_add(stcb, ifa, type); 1978 1979 /* 1980 * if queued ok, and in the open state, send out the 1981 * ASCONF. If in the non-open state, these will be 1982 * sent when the state goes open. 1983 */ 1984 if (status == 0 && 1985 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1986#ifdef SCTP_TIMER_BASED_ASCONF 1987 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1988 stcb, stcb->asoc.primary_destination); 1989#else 1990 sctp_send_asconf(stcb, NULL, addr_locked); 1991#endif 1992 } 1993 } 1994 } 1995} 1996 1997 1998int 1999sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2000{ 2001 struct sctp_asconf_iterator *asc; 2002 struct sctp_ifa *ifa; 2003 struct sctp_laddr *l; 2004 int cnt_invalid = 0; 2005 2006 asc = (struct sctp_asconf_iterator *)ptr; 2007 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2008 ifa = l->ifa; 2009 switch (ifa->address.sa.sa_family) { 2010#ifdef INET6 2011 case AF_INET6: 2012 /* invalid if we're not a v6 endpoint */ 2013 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2014 cnt_invalid++; 2015 if (asc->cnt == cnt_invalid) 2016 return (1); 2017 } 2018 break; 2019#endif 2020#ifdef INET 2021 case AF_INET: 2022 { 2023 /* invalid if we are a v6 only endpoint */ 2024 struct in6pcb *inp6; 2025 2026 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2027 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2028 SCTP_IPV6_V6ONLY(inp6)) { 2029 cnt_invalid++; 2030 if (asc->cnt == cnt_invalid) 2031 return (1); 2032 } 2033 break; 2034 } 2035#endif 2036 default: 2037 /* invalid address family */ 2038 cnt_invalid++; 2039 if (asc->cnt == cnt_invalid) 2040 return (1); 2041 } 2042 } 2043 return (0); 2044} 2045 2046static int 2047sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) 2048{ 2049 struct sctp_ifa *ifa; 2050 struct sctp_asconf_iterator *asc; 2051 struct sctp_laddr *laddr, *nladdr, *l; 2052 2053 /* Only for specific case not bound all */ 2054 asc = (struct sctp_asconf_iterator *)ptr; 2055 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2056 ifa = l->ifa; 2057 if (l->action == SCTP_ADD_IP_ADDRESS) { 2058 LIST_FOREACH(laddr, &inp->sctp_addr_list, 2059 sctp_nxt_addr) { 2060 if (laddr->ifa == ifa) { 2061 laddr->action = 0; 2062 break; 2063 } 2064 } 2065 } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2066 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 2067 /* remove only after all guys are done */ 2068 if (laddr->ifa == ifa) { 2069 sctp_del_local_addr_ep(inp, ifa); 2070 } 2071 } 2072 } 2073 } 2074 return (0); 2075} 2076 2077void 2078sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2079 void *ptr, uint32_t val SCTP_UNUSED) 2080{ 2081 struct sctp_asconf_iterator *asc; 2082 struct sctp_ifa *ifa; 2083 struct sctp_laddr *l; 2084 int cnt_invalid = 0; 2085 int type, status; 2086 int num_queued = 0; 2087 2088 asc = (struct sctp_asconf_iterator *)ptr; 2089 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2090 ifa = l->ifa; 2091 type = l->action; 2092 2093 /* address's vrf_id must be the vrf_id of the assoc */ 2094 if (ifa->vrf_id != stcb->asoc.vrf_id) { 2095 continue; 2096 } 2097 /* Same checks again for assoc */ 2098 switch (ifa->address.sa.sa_family) { 2099#ifdef INET6 2100 case AF_INET6: 2101 { 2102 /* invalid if we're not a v6 endpoint */ 2103 struct sockaddr_in6 *sin6; 2104 2105 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2106 cnt_invalid++; 2107 if (asc->cnt == cnt_invalid) 2108 return; 2109 else 2110 continue; 2111 } 2112 sin6 = &ifa->address.sin6; 2113 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2114 /* we skip unspecifed addresses */ 2115 continue; 2116 } 2117 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2118 &sin6->sin6_addr) != 0) { 2119 continue; 2120 } 2121 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2122 if (stcb->asoc.scope.local_scope == 0) { 2123 continue; 2124 } 2125 /* is it the right link local scope? */ 2126 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2127 continue; 2128 } 2129 } 2130 break; 2131 } 2132#endif 2133#ifdef INET 2134 case AF_INET: 2135 { 2136 /* invalid if we are a v6 only endpoint */ 2137 struct in6pcb *inp6; 2138 struct sockaddr_in *sin; 2139 2140 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2141 /* invalid if we are a v6 only endpoint */ 2142 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2143 SCTP_IPV6_V6ONLY(inp6)) 2144 continue; 2145 2146 sin = &ifa->address.sin; 2147 if (sin->sin_addr.s_addr == 0) { 2148 /* we skip unspecifed addresses */ 2149 continue; 2150 } 2151 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2152 &sin->sin_addr) != 0) { 2153 continue; 2154 } 2155 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2156 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2157 continue; 2158 } 2159 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2160 SCTP_IPV6_V6ONLY(inp6)) { 2161 cnt_invalid++; 2162 if (asc->cnt == cnt_invalid) 2163 return; 2164 else 2165 continue; 2166 } 2167 break; 2168 } 2169#endif 2170 default: 2171 /* invalid address family */ 2172 cnt_invalid++; 2173 if (asc->cnt == cnt_invalid) 2174 return; 2175 else 2176 continue; 2177 break; 2178 } 2179 2180 if (type == SCTP_ADD_IP_ADDRESS) { 2181 /* prevent this address from being used as a source */ 2182 sctp_add_local_addr_restricted(stcb, ifa); 2183 } else if (type == SCTP_DEL_IP_ADDRESS) { 2184 struct sctp_nets *net; 2185 2186 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2187 sctp_rtentry_t *rt; 2188 2189 /* delete this address if cached */ 2190 if (net->ro._s_addr == ifa) { 2191 sctp_free_ifa(net->ro._s_addr); 2192 net->ro._s_addr = NULL; 2193 net->src_addr_selected = 0; 2194 rt = net->ro.ro_rt; 2195 if (rt) { 2196 RTFREE(rt); 2197 net->ro.ro_rt = NULL; 2198 } 2199 /* 2200 * Now we deleted our src address, 2201 * should we not also now reset the 2202 * cwnd/rto to start as if its a new 2203 * address? 2204 */ 2205 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2206 net->RTO = 0; 2207 2208 } 2209 } 2210 } else if (type == SCTP_SET_PRIM_ADDR) { 2211 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2212 /* must validate the ifa is in the ep */ 2213 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2214 continue; 2215 } 2216 } else { 2217 /* Need to check scopes for this guy */ 2218 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2219 continue; 2220 } 2221 } 2222 } 2223 /* queue an asconf for this address add/delete */ 2224 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2225 stcb->asoc.asconf_supported == 1) { 2226 /* queue an asconf for this addr */ 2227 status = sctp_asconf_queue_add(stcb, ifa, type); 2228 /* 2229 * if queued ok, and in the open state, update the 2230 * count of queued params. If in the non-open 2231 * state, these get sent when the assoc goes open. 2232 */ 2233 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2234 if (status >= 0) { 2235 num_queued++; 2236 } 2237 } 2238 } 2239 } 2240 /* 2241 * If we have queued params in the open state, send out an ASCONF. 2242 */ 2243 if (num_queued > 0) { 2244 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2245 } 2246} 2247 2248void 2249sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) 2250{ 2251 struct sctp_asconf_iterator *asc; 2252 struct sctp_ifa *ifa; 2253 struct sctp_laddr *l, *nl; 2254 2255 asc = (struct sctp_asconf_iterator *)ptr; 2256 LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { 2257 ifa = l->ifa; 2258 if (l->action == SCTP_ADD_IP_ADDRESS) { 2259 /* Clear the defer use flag */ 2260 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2261 } 2262 sctp_free_ifa(ifa); 2263 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2264 SCTP_DECR_LADDR_COUNT(); 2265 } 2266 SCTP_FREE(asc, SCTP_M_ASC_IT); 2267} 2268 2269/* 2270 * sa is the sockaddr to ask the peer to set primary to. 2271 * returns: 0 = completed, -1 = error 2272 */ 2273int32_t 2274sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2275{ 2276 uint32_t vrf_id; 2277 struct sctp_ifa *ifa; 2278 2279 /* find the ifa for the desired set primary */ 2280 vrf_id = stcb->asoc.vrf_id; 2281 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2282 if (ifa == NULL) { 2283 /* Invalid address */ 2284 return (-1); 2285 } 2286 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2287 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2288 /* set primary queuing succeeded */ 2289 SCTPDBG(SCTP_DEBUG_ASCONF1, 2290 "set_primary_ip_address_sa: queued on tcb=%p, ", 2291 (void *)stcb); 2292 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2293 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2294#ifdef SCTP_TIMER_BASED_ASCONF 2295 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2296 stcb->sctp_ep, stcb, 2297 stcb->asoc.primary_destination); 2298#else 2299 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2300#endif 2301 } 2302 } else { 2303 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2304 (void *)stcb); 2305 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2306 return (-1); 2307 } 2308 return (0); 2309} 2310 2311void 2312sctp_set_primary_ip_address(struct sctp_ifa *ifa) 2313{ 2314 struct sctp_inpcb *inp; 2315 2316 /* go through all our PCB's */ 2317 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2318 struct sctp_tcb *stcb; 2319 2320 /* process for all associations for this endpoint */ 2321 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2322 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2323 if (!sctp_asconf_queue_add(stcb, ifa, 2324 SCTP_SET_PRIM_ADDR)) { 2325 /* set primary queuing succeeded */ 2326 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2327 (void *)stcb); 2328 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2329 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2330#ifdef SCTP_TIMER_BASED_ASCONF 2331 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2332 stcb->sctp_ep, stcb, 2333 stcb->asoc.primary_destination); 2334#else 2335 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2336#endif 2337 } 2338 } 2339 } /* for each stcb */ 2340 } /* for each inp */ 2341} 2342 2343int 2344sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2345{ 2346 struct sctp_tmit_chunk *chk, *nchk; 2347 unsigned int offset, asconf_limit; 2348 struct sctp_asconf_chunk *acp; 2349 struct sctp_asconf_paramhdr *aph; 2350 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2351 struct sctp_paramhdr *ph; 2352 int add_cnt, del_cnt; 2353 uint16_t last_param_type; 2354 2355 add_cnt = del_cnt = 0; 2356 last_param_type = 0; 2357 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { 2358 if (chk->data == NULL) { 2359 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2360 continue; 2361 } 2362 offset = 0; 2363 acp = mtod(chk->data, struct sctp_asconf_chunk *); 2364 offset += sizeof(struct sctp_asconf_chunk); 2365 asconf_limit = ntohs(acp->ch.chunk_length); 2366 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2367 if (ph == NULL) { 2368 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2369 continue; 2370 } 2371 offset += ntohs(ph->param_length); 2372 2373 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2374 if (aph == NULL) { 2375 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2376 continue; 2377 } 2378 while (aph != NULL) { 2379 unsigned int param_length, param_type; 2380 2381 param_type = ntohs(aph->ph.param_type); 2382 param_length = ntohs(aph->ph.param_length); 2383 if (offset + param_length > asconf_limit) { 2384 /* parameter goes beyond end of chunk! */ 2385 break; 2386 } 2387 if (param_length > sizeof(aparam_buf)) { 2388 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2389 break; 2390 } 2391 if (param_length <= sizeof(struct sctp_paramhdr)) { 2392 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2393 break; 2394 } 2395 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2396 if (aph == NULL) { 2397 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2398 break; 2399 } 2400 ph = (struct sctp_paramhdr *)(aph + 1); 2401 if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { 2402 switch (param_type) { 2403 case SCTP_ADD_IP_ADDRESS: 2404 add_cnt++; 2405 break; 2406 case SCTP_DEL_IP_ADDRESS: 2407 del_cnt++; 2408 break; 2409 default: 2410 break; 2411 } 2412 last_param_type = param_type; 2413 } 2414 offset += SCTP_SIZE32(param_length); 2415 if (offset >= asconf_limit) { 2416 /* no more data in the mbuf chain */ 2417 break; 2418 } 2419 /* get pointer to next asconf param */ 2420 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2421 } 2422 } 2423 2424 /* 2425 * we want to find the sequences which consist of ADD -> DEL -> ADD 2426 * or DEL -> ADD 2427 */ 2428 if (add_cnt > del_cnt || 2429 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2430 return (1); 2431 } 2432 return (0); 2433} 2434 2435static struct sockaddr * 2436sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2437{ 2438 struct sctp_vrf *vrf = NULL; 2439 struct sctp_ifn *sctp_ifn; 2440 struct sctp_ifa *sctp_ifa; 2441 2442 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2443 SCTP_IPI_ADDR_RLOCK(); 2444 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2445 if (vrf == NULL) { 2446 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2447 SCTP_IPI_ADDR_RUNLOCK(); 2448 return (NULL); 2449 } 2450 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2451 if (stcb->asoc.scope.loopback_scope == 0 && 2452 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2453 /* Skip if loopback_scope not set */ 2454 continue; 2455 } 2456 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2457 switch (sctp_ifa->address.sa.sa_family) { 2458#ifdef INET 2459 case AF_INET: 2460 if (stcb->asoc.scope.ipv4_addr_legal) { 2461 struct sockaddr_in *sin; 2462 2463 sin = &sctp_ifa->address.sin; 2464 if (sin->sin_addr.s_addr == 0) { 2465 /* skip unspecifed addresses */ 2466 continue; 2467 } 2468 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 2469 &sin->sin_addr) != 0) { 2470 continue; 2471 } 2472 if (stcb->asoc.scope.ipv4_local_scope == 0 && 2473 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2474 continue; 2475 2476 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2477 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2478 continue; 2479 /* 2480 * found a valid local v4 address to 2481 * use 2482 */ 2483 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2484 SCTP_IPI_ADDR_RUNLOCK(); 2485 return (&sctp_ifa->address.sa); 2486 } 2487 break; 2488#endif 2489#ifdef INET6 2490 case AF_INET6: 2491 if (stcb->asoc.scope.ipv6_addr_legal) { 2492 struct sockaddr_in6 *sin6; 2493 2494 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2495 continue; 2496 } 2497 sin6 = &sctp_ifa->address.sin6; 2498 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2499 /* 2500 * we skip unspecifed 2501 * addresses 2502 */ 2503 continue; 2504 } 2505 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 2506 &sin6->sin6_addr) != 0) { 2507 continue; 2508 } 2509 if (stcb->asoc.scope.local_scope == 0 && 2510 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2511 continue; 2512 if (stcb->asoc.scope.site_scope == 0 && 2513 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2514 continue; 2515 2516 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2517 (!sctp_is_addr_pending(stcb, sctp_ifa))) 2518 continue; 2519 /* 2520 * found a valid local v6 address to 2521 * use 2522 */ 2523 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2524 SCTP_IPI_ADDR_RUNLOCK(); 2525 return (&sctp_ifa->address.sa); 2526 } 2527 break; 2528#endif 2529 default: 2530 break; 2531 } 2532 } 2533 } 2534 /* no valid addresses found */ 2535 if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2536 SCTP_IPI_ADDR_RUNLOCK(); 2537 return (NULL); 2538} 2539 2540static struct sockaddr * 2541sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2542{ 2543 struct sctp_laddr *laddr; 2544 2545 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2546 if (laddr->ifa == NULL) { 2547 continue; 2548 } 2549 /* is the address restricted ? */ 2550 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2551 (!sctp_is_addr_pending(stcb, laddr->ifa))) 2552 continue; 2553 2554 /* found a valid local address to use */ 2555 return (&laddr->ifa->address.sa); 2556 } 2557 /* no valid addresses found */ 2558 return (NULL); 2559} 2560 2561/* 2562 * builds an ASCONF chunk from queued ASCONF params. 2563 * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2564 */ 2565struct mbuf * 2566sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2567{ 2568 struct mbuf *m_asconf, *m_asconf_chk; 2569 struct sctp_asconf_addr *aa; 2570 struct sctp_asconf_chunk *acp; 2571 struct sctp_asconf_paramhdr *aph; 2572 struct sctp_asconf_addr_param *aap; 2573 uint32_t p_length; 2574 uint32_t correlation_id = 1; /* 0 is reserved... */ 2575 caddr_t ptr, lookup_ptr; 2576 uint8_t lookup_used = 0; 2577 2578 /* are there any asconf params to send? */ 2579 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2580 if (aa->sent == 0) 2581 break; 2582 } 2583 if (aa == NULL) 2584 return (NULL); 2585 2586 /* 2587 * get a chunk header mbuf and a cluster for the asconf params since 2588 * it's simpler to fill in the asconf chunk header lookup address on 2589 * the fly 2590 */ 2591 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); 2592 if (m_asconf_chk == NULL) { 2593 /* no mbuf's */ 2594 SCTPDBG(SCTP_DEBUG_ASCONF1, 2595 "compose_asconf: couldn't get chunk mbuf!\n"); 2596 return (NULL); 2597 } 2598 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 2599 if (m_asconf == NULL) { 2600 /* no mbuf's */ 2601 SCTPDBG(SCTP_DEBUG_ASCONF1, 2602 "compose_asconf: couldn't get mbuf!\n"); 2603 sctp_m_freem(m_asconf_chk); 2604 return (NULL); 2605 } 2606 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2607 SCTP_BUF_LEN(m_asconf) = 0; 2608 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2609 bzero(acp, sizeof(struct sctp_asconf_chunk)); 2610 /* save pointers to lookup address and asconf params */ 2611 lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2612 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2613 2614 /* fill in chunk header info */ 2615 acp->ch.chunk_type = SCTP_ASCONF; 2616 acp->ch.chunk_flags = 0; 2617 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2618 stcb->asoc.asconf_seq_out++; 2619 2620 /* add parameters... up to smallest MTU allowed */ 2621 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2622 if (aa->sent) 2623 continue; 2624 /* get the parameter length */ 2625 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2626 /* will it fit in current chunk? */ 2627 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || 2628 (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { 2629 /* won't fit, so we're done with this chunk */ 2630 break; 2631 } 2632 /* assign (and store) a correlation id */ 2633 aa->ap.aph.correlation_id = correlation_id++; 2634 2635 /* 2636 * fill in address if we're doing a delete this is a simple 2637 * way for us to fill in the correlation address, which 2638 * should only be used by the peer if we're deleting our 2639 * source address and adding a new address (e.g. renumbering 2640 * case) 2641 */ 2642 if (lookup_used == 0 && 2643 (aa->special_del == 0) && 2644 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2645 struct sctp_ipv6addr_param *lookup; 2646 uint16_t p_size, addr_size; 2647 2648 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2649 lookup->ph.param_type = 2650 htons(aa->ap.addrp.ph.param_type); 2651 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2652 /* copy IPv6 address */ 2653 p_size = sizeof(struct sctp_ipv6addr_param); 2654 addr_size = sizeof(struct in6_addr); 2655 } else { 2656 /* copy IPv4 address */ 2657 p_size = sizeof(struct sctp_ipv4addr_param); 2658 addr_size = sizeof(struct in_addr); 2659 } 2660 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2661 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2662 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2663 lookup_used = 1; 2664 } 2665 /* copy into current space */ 2666 memcpy(ptr, &aa->ap, p_length); 2667 2668 /* network elements and update lengths */ 2669 aph = (struct sctp_asconf_paramhdr *)ptr; 2670 aap = (struct sctp_asconf_addr_param *)ptr; 2671 /* correlation_id is transparent to peer, no htonl needed */ 2672 aph->ph.param_type = htons(aph->ph.param_type); 2673 aph->ph.param_length = htons(aph->ph.param_length); 2674 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2675 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2676 2677 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2678 ptr += SCTP_SIZE32(p_length); 2679 2680 /* 2681 * these params are removed off the pending list upon 2682 * getting an ASCONF-ACK back from the peer, just set flag 2683 */ 2684 aa->sent = 1; 2685 } 2686 /* check to see if the lookup addr has been populated yet */ 2687 if (lookup_used == 0) { 2688 /* NOTE: if the address param is optional, can skip this... */ 2689 /* add any valid (existing) address... */ 2690 struct sctp_ipv6addr_param *lookup; 2691 uint16_t p_size, addr_size; 2692 struct sockaddr *found_addr; 2693 caddr_t addr_ptr; 2694 2695 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2696 found_addr = sctp_find_valid_localaddr(stcb, 2697 addr_locked); 2698 else 2699 found_addr = sctp_find_valid_localaddr_ep(stcb); 2700 2701 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2702 if (found_addr != NULL) { 2703 switch (found_addr->sa_family) { 2704#ifdef INET6 2705 case AF_INET6: 2706 /* copy IPv6 address */ 2707 lookup->ph.param_type = 2708 htons(SCTP_IPV6_ADDRESS); 2709 p_size = sizeof(struct sctp_ipv6addr_param); 2710 addr_size = sizeof(struct in6_addr); 2711 addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2712 found_addr)->sin6_addr; 2713 break; 2714#endif 2715#ifdef INET 2716 case AF_INET: 2717 /* copy IPv4 address */ 2718 lookup->ph.param_type = 2719 htons(SCTP_IPV4_ADDRESS); 2720 p_size = sizeof(struct sctp_ipv4addr_param); 2721 addr_size = sizeof(struct in_addr); 2722 addr_ptr = (caddr_t)&((struct sockaddr_in *) 2723 found_addr)->sin_addr; 2724 break; 2725#endif 2726 default: 2727 p_size = 0; 2728 addr_size = 0; 2729 addr_ptr = NULL; 2730 break; 2731 } 2732 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2733 memcpy(lookup->addr, addr_ptr, addr_size); 2734 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2735 } else { 2736 /* uh oh... don't have any address?? */ 2737 SCTPDBG(SCTP_DEBUG_ASCONF1, 2738 "compose_asconf: no lookup addr!\n"); 2739 /* XXX for now, we send a IPv4 address of 0.0.0.0 */ 2740 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2741 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2742 bzero(lookup->addr, sizeof(struct in_addr)); 2743 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2744 } 2745 } 2746 /* chain it all together */ 2747 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2748 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2749 acp->ch.chunk_length = htons(*retlen); 2750 2751 return (m_asconf_chk); 2752} 2753 2754/* 2755 * section to handle address changes before an association is up eg. changes 2756 * during INIT/INIT-ACK/COOKIE-ECHO handshake 2757 */ 2758 2759/* 2760 * processes the (local) addresses in the INIT-ACK chunk 2761 */ 2762static void 2763sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2764 unsigned int offset, unsigned int length) 2765{ 2766 struct sctp_paramhdr tmp_param, *ph; 2767 uint16_t plen, ptype; 2768 struct sctp_ifa *sctp_ifa; 2769 union sctp_sockstore store; 2770 2771#ifdef INET6 2772 struct sctp_ipv6addr_param addr6_store; 2773 2774#endif 2775#ifdef INET 2776 struct sctp_ipv4addr_param addr4_store; 2777 2778#endif 2779 2780 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2781 if (stcb == NULL) /* Un-needed check for SA */ 2782 return; 2783 2784 /* convert to upper bound */ 2785 length += offset; 2786 2787 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2788 return; 2789 } 2790 /* go through the addresses in the init-ack */ 2791 ph = (struct sctp_paramhdr *) 2792 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2793 (uint8_t *) & tmp_param); 2794 while (ph != NULL) { 2795 ptype = ntohs(ph->param_type); 2796 plen = ntohs(ph->param_length); 2797 switch (ptype) { 2798#ifdef INET6 2799 case SCTP_IPV6_ADDRESS: 2800 { 2801 struct sctp_ipv6addr_param *a6p; 2802 2803 /* get the entire IPv6 address param */ 2804 a6p = (struct sctp_ipv6addr_param *) 2805 sctp_m_getptr(m, offset, 2806 sizeof(struct sctp_ipv6addr_param), 2807 (uint8_t *) & addr6_store); 2808 if (plen != sizeof(struct sctp_ipv6addr_param) || 2809 a6p == NULL) { 2810 return; 2811 } 2812 memset(&store, 0, sizeof(union sctp_sockstore)); 2813 store.sin6.sin6_family = AF_INET6; 2814 store.sin6.sin6_len = sizeof(struct sockaddr_in6); 2815 store.sin6.sin6_port = stcb->rport; 2816 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); 2817 break; 2818 } 2819#endif 2820#ifdef INET 2821 case SCTP_IPV4_ADDRESS: 2822 { 2823 struct sctp_ipv4addr_param *a4p; 2824 2825 /* get the entire IPv4 address param */ 2826 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2827 sizeof(struct sctp_ipv4addr_param), 2828 (uint8_t *) & addr4_store); 2829 if (plen != sizeof(struct sctp_ipv4addr_param) || 2830 a4p == NULL) { 2831 return; 2832 } 2833 memset(&store, 0, sizeof(union sctp_sockstore)); 2834 store.sin.sin_family = AF_INET; 2835 store.sin.sin_len = sizeof(struct sockaddr_in); 2836 store.sin.sin_port = stcb->rport; 2837 store.sin.sin_addr.s_addr = a4p->addr; 2838 break; 2839 } 2840#endif 2841 default: 2842 goto next_addr; 2843 } 2844 2845 /* see if this address really (still) exists */ 2846 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, 2847 SCTP_ADDR_NOT_LOCKED); 2848 if (sctp_ifa == NULL) { 2849 /* address doesn't exist anymore */ 2850 int status; 2851 2852 /* are ASCONFs allowed ? */ 2853 if ((sctp_is_feature_on(stcb->sctp_ep, 2854 SCTP_PCB_FLAGS_DO_ASCONF)) && 2855 stcb->asoc.asconf_supported) { 2856 /* queue an ASCONF DEL_IP_ADDRESS */ 2857 status = sctp_asconf_queue_sa_delete(stcb, &store.sa); 2858 /* 2859 * if queued ok, and in correct state, send 2860 * out the ASCONF. 2861 */ 2862 if (status == 0 && 2863 SCTP_GET_STATE(&stcb->asoc) == 2864 SCTP_STATE_OPEN) { 2865#ifdef SCTP_TIMER_BASED_ASCONF 2866 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2867 stcb->sctp_ep, stcb, 2868 stcb->asoc.primary_destination); 2869#else 2870 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); 2871#endif 2872 } 2873 } 2874 } 2875next_addr: 2876 /* 2877 * Sanity check: Make sure the length isn't 0, otherwise 2878 * we'll be stuck in this loop for a long time... 2879 */ 2880 if (SCTP_SIZE32(plen) == 0) { 2881 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2882 plen, ptype); 2883 return; 2884 } 2885 /* get next parameter */ 2886 offset += SCTP_SIZE32(plen); 2887 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2888 return; 2889 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2890 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2891 } /* while */ 2892} 2893 2894/* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2895/* 2896 * checks to see if a specific address is in the initack address list returns 2897 * 1 if found, 0 if not 2898 */ 2899static uint32_t 2900sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) 2901{ 2902 struct sctp_paramhdr tmp_param, *ph; 2903 uint16_t plen, ptype; 2904 2905#ifdef INET 2906 struct sockaddr_in *sin; 2907 struct sctp_ipv4addr_param *a4p; 2908 struct sctp_ipv6addr_param addr4_store; 2909 2910#endif 2911#ifdef INET6 2912 struct sockaddr_in6 *sin6; 2913 struct sctp_ipv6addr_param *a6p; 2914 struct sctp_ipv6addr_param addr6_store; 2915 struct sockaddr_in6 sin6_tmp; 2916 2917#endif 2918 2919 switch (sa->sa_family) { 2920#ifdef INET 2921 case AF_INET: 2922 break; 2923#endif 2924#ifdef INET6 2925 case AF_INET6: 2926 break; 2927#endif 2928 default: 2929 return (0); 2930 } 2931 2932 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2933 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2934 /* convert to upper bound */ 2935 length += offset; 2936 2937 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2938 SCTPDBG(SCTP_DEBUG_ASCONF1, 2939 "find_initack_addr: invalid offset?\n"); 2940 return (0); 2941 } 2942 /* go through the addresses in the init-ack */ 2943 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2944 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2945 while (ph != NULL) { 2946 ptype = ntohs(ph->param_type); 2947 plen = ntohs(ph->param_length); 2948 switch (ptype) { 2949#ifdef INET6 2950 case SCTP_IPV6_ADDRESS: 2951 if (sa->sa_family == AF_INET6) { 2952 /* get the entire IPv6 address param */ 2953 if (plen != sizeof(struct sctp_ipv6addr_param)) { 2954 break; 2955 } 2956 /* get the entire IPv6 address param */ 2957 a6p = (struct sctp_ipv6addr_param *) 2958 sctp_m_getptr(m, offset, 2959 sizeof(struct sctp_ipv6addr_param), 2960 (uint8_t *) & addr6_store); 2961 if (a6p == NULL) { 2962 return (0); 2963 } 2964 sin6 = (struct sockaddr_in6 *)sa; 2965 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2966 /* create a copy and clear scope */ 2967 memcpy(&sin6_tmp, sin6, 2968 sizeof(struct sockaddr_in6)); 2969 sin6 = &sin6_tmp; 2970 in6_clearscope(&sin6->sin6_addr); 2971 } 2972 if (memcmp(&sin6->sin6_addr, a6p->addr, 2973 sizeof(struct in6_addr)) == 0) { 2974 /* found it */ 2975 return (1); 2976 } 2977 } 2978 break; 2979#endif /* INET6 */ 2980#ifdef INET 2981 case SCTP_IPV4_ADDRESS: 2982 if (sa->sa_family == AF_INET) { 2983 if (plen != sizeof(struct sctp_ipv4addr_param)) { 2984 break; 2985 } 2986 /* get the entire IPv4 address param */ 2987 a4p = (struct sctp_ipv4addr_param *) 2988 sctp_m_getptr(m, offset, 2989 sizeof(struct sctp_ipv4addr_param), 2990 (uint8_t *) & addr4_store); 2991 if (a4p == NULL) { 2992 return (0); 2993 } 2994 sin = (struct sockaddr_in *)sa; 2995 if (sin->sin_addr.s_addr == a4p->addr) { 2996 /* found it */ 2997 return (1); 2998 } 2999 } 3000 break; 3001#endif 3002 default: 3003 break; 3004 } 3005 /* get next parameter */ 3006 offset += SCTP_SIZE32(plen); 3007 if (offset + sizeof(struct sctp_paramhdr) > length) { 3008 return (0); 3009 } 3010 ph = (struct sctp_paramhdr *) 3011 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3012 (uint8_t *) & tmp_param); 3013 } /* while */ 3014 /* not found! */ 3015 return (0); 3016} 3017 3018/* 3019 * makes sure that the current endpoint local addr list is consistent with 3020 * the new association (eg. subset bound, asconf allowed) adds addresses as 3021 * necessary 3022 */ 3023static void 3024sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3025 int length, struct sockaddr *init_addr) 3026{ 3027 struct sctp_laddr *laddr; 3028 3029 /* go through the endpoint list */ 3030 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3031 /* be paranoid and validate the laddr */ 3032 if (laddr->ifa == NULL) { 3033 SCTPDBG(SCTP_DEBUG_ASCONF1, 3034 "check_addr_list_ep: laddr->ifa is NULL"); 3035 continue; 3036 } 3037 if (laddr->ifa == NULL) { 3038 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3039 continue; 3040 } 3041 /* do i have it implicitly? */ 3042 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3043 continue; 3044 } 3045 /* check to see if in the init-ack */ 3046 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { 3047 /* try to add it */ 3048 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3049 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3050 } 3051 } 3052} 3053 3054/* 3055 * makes sure that the current kernel address list is consistent with the new 3056 * association (with all addrs bound) adds addresses as necessary 3057 */ 3058static void 3059sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3060 int length, struct sockaddr *init_addr, 3061 uint16_t local_scope, uint16_t site_scope, 3062 uint16_t ipv4_scope, uint16_t loopback_scope) 3063{ 3064 struct sctp_vrf *vrf = NULL; 3065 struct sctp_ifn *sctp_ifn; 3066 struct sctp_ifa *sctp_ifa; 3067 uint32_t vrf_id; 3068 3069#ifdef INET 3070 struct sockaddr_in *sin; 3071 3072#endif 3073#ifdef INET6 3074 struct sockaddr_in6 *sin6; 3075 3076#endif 3077 3078 if (stcb) { 3079 vrf_id = stcb->asoc.vrf_id; 3080 } else { 3081 return; 3082 } 3083 SCTP_IPI_ADDR_RLOCK(); 3084 vrf = sctp_find_vrf(vrf_id); 3085 if (vrf == NULL) { 3086 SCTP_IPI_ADDR_RUNLOCK(); 3087 return; 3088 } 3089 /* go through all our known interfaces */ 3090 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3091 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3092 /* skip loopback interface */ 3093 continue; 3094 } 3095 /* go through each interface address */ 3096 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3097 /* do i have it implicitly? */ 3098 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3099 continue; 3100 } 3101 switch (sctp_ifa->address.sa.sa_family) { 3102#ifdef INET 3103 case AF_INET: 3104 sin = &sctp_ifa->address.sin; 3105 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3106 &sin->sin_addr) != 0) { 3107 continue; 3108 } 3109 if ((ipv4_scope == 0) && 3110 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 3111 /* private address not in scope */ 3112 continue; 3113 } 3114 break; 3115#endif 3116#ifdef INET6 3117 case AF_INET6: 3118 sin6 = &sctp_ifa->address.sin6; 3119 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3120 &sin6->sin6_addr) != 0) { 3121 continue; 3122 } 3123 if ((local_scope == 0) && 3124 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 3125 continue; 3126 } 3127 if ((site_scope == 0) && 3128 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 3129 continue; 3130 } 3131 break; 3132#endif 3133 default: 3134 break; 3135 } 3136 /* check to see if in the init-ack */ 3137 if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { 3138 /* try to add it */ 3139 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3140 sctp_ifa, SCTP_ADD_IP_ADDRESS, 3141 SCTP_ADDR_LOCKED); 3142 } 3143 } /* end foreach ifa */ 3144 } /* end foreach ifn */ 3145 SCTP_IPI_ADDR_RUNLOCK(); 3146} 3147 3148/* 3149 * validates an init-ack chunk (from a cookie-echo) with current addresses 3150 * adds addresses from the init-ack into our local address list, if needed 3151 * queues asconf adds/deletes addresses as needed and makes appropriate list 3152 * changes for source address selection m, offset: points to the start of the 3153 * address list in an init-ack chunk length: total length of the address 3154 * params only init_addr: address where my INIT-ACK was sent from 3155 */ 3156void 3157sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3158 int length, struct sockaddr *init_addr, 3159 uint16_t local_scope, uint16_t site_scope, 3160 uint16_t ipv4_scope, uint16_t loopback_scope) 3161{ 3162 /* process the local addresses in the initack */ 3163 sctp_process_initack_addresses(stcb, m, offset, length); 3164 3165 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3166 /* bound all case */ 3167 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3168 local_scope, site_scope, ipv4_scope, loopback_scope); 3169 } else { 3170 /* subset bound case */ 3171 if (sctp_is_feature_on(stcb->sctp_ep, 3172 SCTP_PCB_FLAGS_DO_ASCONF)) { 3173 /* asconf's allowed */ 3174 sctp_check_address_list_ep(stcb, m, offset, length, 3175 init_addr); 3176 } 3177 /* else, no asconfs allowed, so what we sent is what we get */ 3178 } 3179} 3180 3181/* 3182 * sctp_bindx() support 3183 */ 3184uint32_t 3185sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3186 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3187{ 3188 struct sctp_ifa *ifa; 3189 struct sctp_laddr *laddr, *nladdr; 3190 3191 if (sa->sa_len == 0) { 3192 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3193 return (EINVAL); 3194 } 3195 if (sctp_ifap) { 3196 ifa = sctp_ifap; 3197 } else if (type == SCTP_ADD_IP_ADDRESS) { 3198 /* For an add the address MUST be on the system */ 3199 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3200 } else if (type == SCTP_DEL_IP_ADDRESS) { 3201 /* For a delete we need to find it in the inp */ 3202 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3203 } else { 3204 ifa = NULL; 3205 } 3206 if (ifa != NULL) { 3207 if (type == SCTP_ADD_IP_ADDRESS) { 3208 sctp_add_local_addr_ep(inp, ifa, type); 3209 } else if (type == SCTP_DEL_IP_ADDRESS) { 3210 if (inp->laddr_count < 2) { 3211 /* can't delete the last local address */ 3212 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3213 return (EINVAL); 3214 } 3215 LIST_FOREACH(laddr, &inp->sctp_addr_list, 3216 sctp_nxt_addr) { 3217 if (ifa == laddr->ifa) { 3218 /* Mark in the delete */ 3219 laddr->action = type; 3220 } 3221 } 3222 } 3223 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 3224 /* 3225 * There is no need to start the iterator if the inp 3226 * has no associations. 3227 */ 3228 if (type == SCTP_DEL_IP_ADDRESS) { 3229 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3230 if (laddr->ifa == ifa) { 3231 sctp_del_local_addr_ep(inp, ifa); 3232 } 3233 } 3234 } 3235 } else { 3236 struct sctp_asconf_iterator *asc; 3237 struct sctp_laddr *wi; 3238 3239 SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3240 sizeof(struct sctp_asconf_iterator), 3241 SCTP_M_ASC_IT); 3242 if (asc == NULL) { 3243 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3244 return (ENOMEM); 3245 } 3246 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 3247 if (wi == NULL) { 3248 SCTP_FREE(asc, SCTP_M_ASC_IT); 3249 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3250 return (ENOMEM); 3251 } 3252 LIST_INIT(&asc->list_of_work); 3253 asc->cnt = 1; 3254 SCTP_INCR_LADDR_COUNT(); 3255 wi->ifa = ifa; 3256 wi->action = type; 3257 atomic_add_int(&ifa->refcount, 1); 3258 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3259 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3260 sctp_asconf_iterator_stcb, 3261 sctp_asconf_iterator_ep_end, 3262 SCTP_PCB_ANY_FLAGS, 3263 SCTP_PCB_ANY_FEATURES, 3264 SCTP_ASOC_ANY_STATE, 3265 (void *)asc, 0, 3266 sctp_asconf_iterator_end, inp, 0); 3267 } 3268 return (0); 3269 } else { 3270 /* invalid address! */ 3271 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3272 return (EADDRNOTAVAIL); 3273 } 3274} 3275 3276void 3277sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3278 struct sctp_nets *net) 3279{ 3280 struct sctp_asconf_addr *aa; 3281 struct sctp_ifa *sctp_ifap; 3282 struct sctp_asconf_tag_param *vtag; 3283 3284#ifdef INET 3285 struct sockaddr_in *to; 3286 3287#endif 3288#ifdef INET6 3289 struct sockaddr_in6 *to6; 3290 3291#endif 3292 if (net == NULL) { 3293 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3294 return; 3295 } 3296 if (stcb == NULL) { 3297 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3298 return; 3299 } 3300 /* 3301 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3302 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3303 */ 3304 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3305 SCTP_M_ASC_ADDR); 3306 if (aa == NULL) { 3307 /* didn't get memory */ 3308 SCTPDBG(SCTP_DEBUG_ASCONF1, 3309 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3310 return; 3311 } 3312 aa->special_del = 0; 3313 /* fill in asconf address parameter fields */ 3314 /* top level elements are "networked" during send */ 3315 aa->ifa = NULL; 3316 aa->sent = 0; /* clear sent flag */ 3317 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3318 vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3319 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3320 vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3321 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3322 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3323 3324 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3325 SCTP_M_ASC_ADDR); 3326 if (aa == NULL) { 3327 /* didn't get memory */ 3328 SCTPDBG(SCTP_DEBUG_ASCONF1, 3329 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3330 return; 3331 } 3332 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3333 /* fill in asconf address parameter fields */ 3334 /* ADD(0.0.0.0) */ 3335 switch (net->ro._l_addr.sa.sa_family) { 3336#ifdef INET 3337 case AF_INET: 3338 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3339 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3340 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3341 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3342 /* No need to add an address, we are using 0.0.0.0 */ 3343 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3344 break; 3345#endif 3346#ifdef INET6 3347 case AF_INET6: 3348 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3349 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3350 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3351 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3352 /* No need to add an address, we are using 0.0.0.0 */ 3353 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3354 break; 3355#endif 3356 } 3357 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3358 SCTP_M_ASC_ADDR); 3359 if (aa == NULL) { 3360 /* didn't get memory */ 3361 SCTPDBG(SCTP_DEBUG_ASCONF1, 3362 "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3363 return; 3364 } 3365 memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3366 /* fill in asconf address parameter fields */ 3367 /* ADD(0.0.0.0) */ 3368 switch (net->ro._l_addr.sa.sa_family) { 3369#ifdef INET 3370 case AF_INET: 3371 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3372 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3373 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3374 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3375 /* No need to add an address, we are using 0.0.0.0 */ 3376 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3377 break; 3378#endif 3379#ifdef INET6 3380 case AF_INET6: 3381 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3382 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3383 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3384 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3385 /* No need to add an address, we are using 0.0.0.0 */ 3386 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3387 break; 3388#endif 3389 } 3390 /* Now we must hunt the addresses and add all global addresses */ 3391 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3392 struct sctp_vrf *vrf = NULL; 3393 struct sctp_ifn *sctp_ifnp; 3394 uint32_t vrf_id; 3395 3396 vrf_id = stcb->sctp_ep->def_vrf_id; 3397 vrf = sctp_find_vrf(vrf_id); 3398 if (vrf == NULL) { 3399 goto skip_rest; 3400 } 3401 SCTP_IPI_ADDR_RLOCK(); 3402 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3403 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3404 switch (sctp_ifap->address.sa.sa_family) { 3405#ifdef INET 3406 case AF_INET: 3407 to = &sctp_ifap->address.sin; 3408 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 3409 &to->sin_addr) != 0) { 3410 continue; 3411 } 3412 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3413 continue; 3414 } 3415 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3416 continue; 3417 } 3418 break; 3419#endif 3420#ifdef INET6 3421 case AF_INET6: 3422 to6 = &sctp_ifap->address.sin6; 3423 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 3424 &to6->sin6_addr) != 0) { 3425 continue; 3426 } 3427 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3428 continue; 3429 } 3430 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3431 continue; 3432 } 3433 break; 3434#endif 3435 default: 3436 continue; 3437 } 3438 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3439 } 3440 } 3441 SCTP_IPI_ADDR_RUNLOCK(); 3442 } else { 3443 struct sctp_laddr *laddr; 3444 3445 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3446 if (laddr->ifa == NULL) { 3447 continue; 3448 } 3449 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3450 /* 3451 * Address being deleted by the system, dont 3452 * list. 3453 */ 3454 continue; 3455 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3456 /* 3457 * Address being deleted on this ep don't 3458 * list. 3459 */ 3460 continue; 3461 } 3462 sctp_ifap = laddr->ifa; 3463 switch (sctp_ifap->address.sa.sa_family) { 3464#ifdef INET 3465 case AF_INET: 3466 to = &sctp_ifap->address.sin; 3467 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3468 continue; 3469 } 3470 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3471 continue; 3472 } 3473 break; 3474#endif 3475#ifdef INET6 3476 case AF_INET6: 3477 to6 = &sctp_ifap->address.sin6; 3478 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3479 continue; 3480 } 3481 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3482 continue; 3483 } 3484 break; 3485#endif 3486 default: 3487 continue; 3488 } 3489 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3490 } 3491 } 3492skip_rest: 3493 /* Now we must send the asconf into the queue */ 3494 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 3495} 3496