sctp_asconf.c revision 1.13
1 /* $NetBSD: sctp_asconf.c,v 1.13 2024/02/09 22:08:37 andvar Exp $ */ 2 /* $KAME: sctp_asconf.c,v 1.25 2005/06/16 20:44:24 jinmei Exp $ */ 3 4 /* 5 * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: sctp_asconf.c,v 1.13 2024/02/09 22:08:37 andvar Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "opt_ipsec.h" 37 #include "opt_inet.h" 38 #include "opt_sctp.h" 39 #endif /* _KERNEL_OPT */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/kernel.h> 48 #include <sys/sysctl.h> 49 50 #include <net/if.h> 51 #include <net/if_types.h> 52 #include <net/route.h> 53 54 #include <netinet/in.h> 55 #include <netinet/in_systm.h> 56 #include <netinet/ip.h> 57 #include <netinet/in_pcb.h> 58 #include <netinet/in_var.h> 59 #include <netinet/ip_var.h> 60 61 #ifdef INET6 62 #include <netinet/ip6.h> 63 #include <netinet6/ip6_var.h> 64 #include <netinet6/in6_pcb.h> 65 #include <netinet/icmp6.h> 66 #include <netinet6/nd6.h> 67 #include <netinet6/scope6_var.h> 68 #include <netinet6/nd6.h> 69 #endif /* INET6 */ 70 71 #include <netinet/in_pcb.h> 72 73 #include <netinet/sctp_var.h> 74 #include <netinet/sctp_pcb.h> 75 #include <netinet/sctp_header.h> 76 #include <netinet/sctputil.h> 77 #include <netinet/sctp_output.h> 78 #include <netinet/sctp_asconf.h> 79 #include <netinet/sctp_route.h> 80 81 /* 82 * debug flags: 83 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 84 * SCTP_DEBUG_ASCONF2: detailed info 85 */ 86 #ifdef SCTP_DEBUG 87 extern u_int32_t sctp_debug_on; 88 #endif /* SCTP_DEBUG */ 89 90 /* 91 * draft-ietf-tsvwg-addip-sctp 92 * 93 * Address management only currently supported 94 * For the bound all case: 95 * the asoc local addr list is always a "DO NOT USE" list 96 * For the subset bound case: 97 * If ASCONFs are allowed: 98 * the endpoint local addr list is the usable address list 99 * the asoc local addr list is the "DO NOT USE" list 100 * If ASCONFs are not allowed: 101 * the endpoint local addr list is the default usable list 102 * the asoc local addr list is the usable address list 103 * 104 * An ASCONF parameter queue exists per asoc which holds the pending 105 * address operations. Lists are updated upon receipt of ASCONF-ACK. 106 * 107 * Deleted addresses are always immediately removed from the lists as 108 * they will (shortly) no longer exist in the kernel. We send ASCONFs 109 * as a courtesy, only if allowed. 110 */ 111 112 /* 113 * ASCONF parameter processing 114 * response_required: set if a reply is required (eg. SUCCESS_REPORT) 115 * returns a mbuf to an "error" response parameter or NULL/"success" if ok 116 * FIX: allocating this many mbufs on the fly is pretty inefficient... 117 */ 118 119 static struct mbuf * 120 sctp_asconf_success_response(uint32_t id) 121 { 122 struct mbuf *m_reply = NULL; 123 struct sctp_asconf_paramhdr *aph; 124 125 MGET(m_reply, M_DONTWAIT, MT_DATA); 126 if (m_reply == NULL) { 127 #ifdef SCTP_DEBUG 128 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 129 printf("asconf_success_response: couldn't get mbuf!\n"); 130 } 131 #endif /* SCTP_DEBUG */ 132 return NULL; 133 } 134 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 135 aph->correlation_id = id; 136 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 137 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 138 m_reply->m_len = aph->ph.param_length; 139 aph->ph.param_length = htons(aph->ph.param_length); 140 141 return m_reply; 142 } 143 144 static struct mbuf * 145 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv, 146 uint16_t tlv_length) 147 { 148 struct mbuf *m_reply = NULL; 149 struct sctp_asconf_paramhdr *aph; 150 struct sctp_error_cause *error; 151 uint8_t *tlv; 152 153 MGET(m_reply, M_DONTWAIT, MT_DATA); 154 if (m_reply == NULL) { 155 #ifdef SCTP_DEBUG 156 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 157 printf("asconf_error_response: couldn't get mbuf!\n"); 158 } 159 #endif /* SCTP_DEBUG */ 160 return NULL; 161 } 162 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 163 error = (struct sctp_error_cause *)(aph + 1); 164 165 aph->correlation_id = id; 166 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 167 error->code = htons(cause); 168 error->length = tlv_length + sizeof(struct sctp_error_cause); 169 aph->ph.param_length = error->length + 170 sizeof(struct sctp_asconf_paramhdr); 171 172 if (aph->ph.param_length > MLEN) { 173 #ifdef SCTP_DEBUG 174 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 175 printf("asconf_error_response: tlv_length (%xh) too big\n", 176 tlv_length); 177 } 178 #endif /* SCTP_DEBUG */ 179 sctp_m_freem(m_reply); /* discard */ 180 return NULL; 181 } 182 183 if (error_tlv != NULL) { 184 tlv = (uint8_t *)(error + 1); 185 memcpy(tlv, error_tlv, tlv_length); 186 } 187 188 m_reply->m_len = aph->ph.param_length; 189 error->length = htons(error->length); 190 aph->ph.param_length = htons(aph->ph.param_length); 191 192 return m_reply; 193 } 194 195 static struct mbuf * 196 sctp_process_asconf_add_ip(struct sctp_asconf_paramhdr *aph, 197 struct sctp_tcb *stcb, int response_required) 198 { 199 struct mbuf *m_reply = NULL; 200 struct sockaddr_storage sa_store; 201 struct sctp_ipv4addr_param *v4addr; 202 uint16_t param_type, param_length, aparam_length; 203 struct sockaddr *sa; 204 struct sockaddr_in *sin; 205 #ifdef INET6 206 struct sockaddr_in6 *sin6; 207 struct sctp_ipv6addr_param *v6addr; 208 #endif /* INET6 */ 209 210 aparam_length = ntohs(aph->ph.param_length); 211 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 212 #ifdef INET6 213 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 214 #endif /* INET6 */ 215 param_type = ntohs(v4addr->ph.param_type); 216 param_length = ntohs(v4addr->ph.param_length); 217 218 sa = (struct sockaddr *)&sa_store; 219 switch (param_type) { 220 case SCTP_IPV4_ADDRESS: 221 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 222 /* invalid param size */ 223 return NULL; 224 } 225 sin = (struct sockaddr_in *)&sa_store; 226 memset(sin, 0, sizeof(*sin)); 227 sin->sin_family = AF_INET; 228 sin->sin_len = sizeof(struct sockaddr_in); 229 sin->sin_port = stcb->rport; 230 sin->sin_addr.s_addr = v4addr->addr; 231 #ifdef SCTP_DEBUG 232 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 233 printf("process_asconf_add_ip: adding "); 234 sctp_print_address(sa); 235 } 236 #endif /* SCTP_DEBUG */ 237 break; 238 case SCTP_IPV6_ADDRESS: 239 #ifdef INET6 240 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 241 /* invalid param size */ 242 return NULL; 243 } 244 sin6 = (struct sockaddr_in6 *)&sa_store; 245 memset(sin6, 0, sizeof(*sin6)); 246 sin6->sin6_family = AF_INET6; 247 sin6->sin6_len = sizeof(struct sockaddr_in6); 248 sin6->sin6_port = stcb->rport; 249 memcpy((void *)&sin6->sin6_addr, v6addr->addr, 250 sizeof(struct in6_addr)); 251 #ifdef SCTP_DEBUG 252 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 253 printf("process_asconf_add_ip: adding "); 254 sctp_print_address(sa); 255 } 256 #endif /* SCTP_DEBUG */ 257 #else 258 /* IPv6 not enabled! */ 259 /* FIX ME: currently sends back an invalid param error */ 260 m_reply = sctp_asconf_error_response(aph->correlation_id, 261 SCTP_ERROR_INVALID_PARAM, (uint8_t *)aph, aparam_length); 262 #ifdef SCTP_DEBUG 263 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 264 printf("process_asconf_add_ip: v6 disabled- skipping "); 265 sctp_print_address(sa); 266 } 267 #endif /* SCTP_DEBUG */ 268 return m_reply; 269 #endif /* INET6 */ 270 break; 271 default: 272 m_reply = sctp_asconf_error_response(aph->correlation_id, 273 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 274 aparam_length); 275 return m_reply; 276 } /* end switch */ 277 278 /* add the address */ 279 if (sctp_add_remote_addr(stcb, sa, 0, 6) != 0) { 280 #ifdef SCTP_DEBUG 281 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 282 printf("process_asconf_add_ip: error adding address\n"); 283 } 284 #endif /* SCTP_DEBUG */ 285 m_reply = sctp_asconf_error_response(aph->correlation_id, 286 SCTP_ERROR_RESOURCE_SHORTAGE, (uint8_t *)aph, 287 aparam_length); 288 } else { 289 /* notify upper layer */ 290 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa); 291 if (response_required) { 292 m_reply = 293 sctp_asconf_success_response(aph->correlation_id); 294 } 295 } 296 297 return m_reply; 298 } 299 300 static struct mbuf * 301 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph, 302 struct sctp_tcb *stcb, int response_required) 303 { 304 struct mbuf *m_reply = NULL; 305 struct sockaddr_storage sa_store, sa_source; 306 struct sctp_ipv4addr_param *v4addr; 307 uint16_t param_type, param_length, aparam_length; 308 struct sockaddr *sa; 309 struct sockaddr_in *sin; 310 struct ip *iph; 311 int result; 312 #ifdef INET6 313 struct sockaddr_in6 *sin6; 314 struct sctp_ipv6addr_param *v6addr; 315 #endif /* INET6 */ 316 317 aparam_length = ntohs(aph->ph.param_length); 318 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 319 #ifdef INET6 320 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 321 #endif /* INET6 */ 322 param_type = ntohs(v4addr->ph.param_type); 323 param_length = ntohs(v4addr->ph.param_length); 324 325 /* get the source IP address for deletion check */ 326 iph = mtod(m, struct ip *); 327 if (iph->ip_v == IPVERSION) { 328 /* IPv4 source */ 329 sin = (struct sockaddr_in *)&sa_source; 330 memset(sin, 0, sizeof(*sin)); 331 sin->sin_family = AF_INET; 332 sin->sin_len = sizeof(struct sockaddr_in); 333 sin->sin_port = stcb->rport; 334 sin->sin_addr.s_addr = iph->ip_src.s_addr; 335 } 336 #ifdef INET6 337 else if (iph->ip_v == (IPV6_VERSION >> 4)) { 338 /* IPv6 source */ 339 struct ip6_hdr *ip6; 340 341 sin6 = (struct sockaddr_in6 *)&sa_source; 342 memset(sin6, 0, sizeof(*sin6)); 343 sin6->sin6_family = AF_INET6; 344 sin6->sin6_len = sizeof(struct sockaddr_in6); 345 sin6->sin6_port = stcb->rport; 346 ip6 = mtod(m, struct ip6_hdr *); 347 sin6->sin6_addr = ip6->ip6_src; 348 } 349 #endif /* INET6 */ 350 else 351 return NULL; 352 353 sa = (struct sockaddr *)&sa_store; 354 switch (param_type) { 355 case SCTP_IPV4_ADDRESS: 356 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 357 /* invalid param size */ 358 return NULL; 359 } 360 sin = (struct sockaddr_in *)&sa_store; 361 memset(sin, 0, sizeof(*sin)); 362 sin->sin_family = AF_INET; 363 sin->sin_len = sizeof(struct sockaddr_in); 364 sin->sin_port = stcb->rport; 365 sin->sin_addr.s_addr = v4addr->addr; 366 #ifdef SCTP_DEBUG 367 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 368 printf("process_asconf_delete_ip: deleting "); 369 sctp_print_address(sa); 370 } 371 #endif /* SCTP_DEBUG */ 372 break; 373 case SCTP_IPV6_ADDRESS: 374 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 375 /* invalid param size */ 376 return NULL; 377 } 378 #ifdef INET6 379 sin6 = (struct sockaddr_in6 *)&sa_store; 380 memset(sin6, 0, sizeof(*sin6)); 381 sin6->sin6_family = AF_INET6; 382 sin6->sin6_len = sizeof(struct sockaddr_in6); 383 sin6->sin6_port = stcb->rport; 384 memcpy(&sin6->sin6_addr, v6addr->addr, 385 sizeof(struct in6_addr)); 386 #ifdef SCTP_DEBUG 387 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 388 printf("process_asconf_delete_ip: deleting "); 389 sctp_print_address(sa); 390 } 391 #endif /* SCTP_DEBUG */ 392 #else 393 /* IPv6 not enabled! No "action" needed; just ack it */ 394 #ifdef SCTP_DEBUG 395 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 396 printf("process_asconf_delete_ip: v6 disabled- ignoring: "); 397 sctp_print_address(sa); 398 } 399 #endif /* SCTP_DEBUG */ 400 /* just respond with a "success" ASCONF-ACK */ 401 return NULL; 402 #endif /* INET6 */ 403 break; 404 default: 405 m_reply = sctp_asconf_error_response(aph->correlation_id, 406 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 407 aparam_length); 408 return m_reply; 409 } /* end switch */ 410 411 /* make sure the source address is not being deleted */ 412 if ((memcmp(sa, &sa_source, sizeof(struct sockaddr_in)) == 0) 413 #ifdef INET6 414 || (memcmp(sa, &sa_source, sizeof(struct sockaddr_in6)) == 0) 415 #endif /* INET6 */ 416 ) { 417 /* trying to delete the source address! */ 418 #ifdef SCTP_DEBUG 419 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 420 printf("process_asconf_delete_ip: tried to delete source addr\n"); 421 } 422 #endif /* SCTP_DEBUG */ 423 m_reply = sctp_asconf_error_response(aph->correlation_id, 424 SCTP_ERROR_DELETE_SOURCE_ADDR, (uint8_t *)aph, 425 aparam_length); 426 return m_reply; 427 } 428 429 /* delete the address */ 430 result = sctp_del_remote_addr(stcb, sa); 431 /* 432 * note if result == -2, the address doesn't exist in the asoc 433 * but since it's being deleted anyways, we just ack the delete 434 * -- but this probably means something has already gone awry 435 */ 436 if (result == -1) { 437 /* only one address in the asoc */ 438 #ifdef SCTP_DEBUG 439 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 440 printf("process_asconf_delete_ip: tried to delete last IP addr!\n"); 441 } 442 #endif /* SCTP_DEBUG */ 443 m_reply = sctp_asconf_error_response(aph->correlation_id, 444 SCTP_ERROR_DELETE_LAST_ADDR, (uint8_t *)aph, 445 aparam_length); 446 } else { 447 /* notify upper layer */ 448 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa); 449 } 450 451 if (response_required) { 452 m_reply = sctp_asconf_success_response(aph->correlation_id); 453 } 454 return m_reply; 455 } 456 457 static struct mbuf * 458 sctp_process_asconf_set_primary(struct sctp_asconf_paramhdr *aph, 459 struct sctp_tcb *stcb, int response_required) 460 { 461 struct mbuf *m_reply = NULL; 462 struct sockaddr_storage sa_store; 463 struct sctp_ipv4addr_param *v4addr; 464 uint16_t param_type, param_length, aparam_length; 465 struct sockaddr *sa; 466 struct sockaddr_in *sin; 467 #ifdef INET6 468 struct sockaddr_in6 *sin6; 469 struct sctp_ipv6addr_param *v6addr; 470 #endif /* INET6 */ 471 472 aparam_length = ntohs(aph->ph.param_length); 473 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 474 #ifdef INET6 475 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 476 #endif /* INET6 */ 477 param_type = ntohs(v4addr->ph.param_type); 478 param_length = ntohs(v4addr->ph.param_length); 479 480 sa = (struct sockaddr *)&sa_store; 481 switch (param_type) { 482 case SCTP_IPV4_ADDRESS: 483 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 484 /* invalid param size */ 485 return NULL; 486 } 487 sin = (struct sockaddr_in *)&sa_store; 488 memset(sin, 0, sizeof(*sin)); 489 sin->sin_family = AF_INET; 490 sin->sin_len = sizeof(struct sockaddr_in); 491 sin->sin_addr.s_addr = v4addr->addr; 492 #ifdef SCTP_DEBUG 493 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 494 printf("process_asconf_set_primary: "); 495 sctp_print_address(sa); 496 } 497 #endif /* SCTP_DEBUG */ 498 break; 499 case SCTP_IPV6_ADDRESS: 500 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 501 /* invalid param size */ 502 return NULL; 503 } 504 #ifdef INET6 505 sin6 = (struct sockaddr_in6 *)&sa_store; 506 memset(sin6, 0, sizeof(*sin6)); 507 sin6->sin6_family = AF_INET6; 508 sin6->sin6_len = sizeof(struct sockaddr_in6); 509 memcpy((void *)&sin6->sin6_addr, v6addr->addr, 510 sizeof(struct in6_addr)); 511 #ifdef SCTP_DEBUG 512 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 513 printf("process_asconf_set_primary: "); 514 sctp_print_address(sa); 515 } 516 #endif /* SCTP_DEBUG */ 517 #else 518 /* IPv6 not enabled! No "action" needed; just ack it */ 519 #ifdef SCTP_DEBUG 520 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 521 printf("process_asconf_set_primary: v6 disabled- ignoring: "); 522 sctp_print_address(sa); 523 } 524 #endif /* SCTP_DEBUG */ 525 /* just respond with a "success" ASCONF-ACK */ 526 return NULL; 527 #endif /* INET6 */ 528 break; 529 default: 530 m_reply = sctp_asconf_error_response(aph->correlation_id, 531 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 532 aparam_length); 533 return m_reply; 534 } /* end switch */ 535 536 /* set the primary address */ 537 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 538 #ifdef SCTP_DEBUG 539 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 540 printf("process_asconf_set_primary: primary address set\n"); 541 } 542 #endif /* SCTP_DEBUG */ 543 /* notify upper layer */ 544 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa); 545 546 if (response_required) { 547 m_reply = sctp_asconf_success_response(aph->correlation_id); 548 } 549 } else { 550 /* couldn't set the requested primary address! */ 551 #ifdef SCTP_DEBUG 552 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 553 printf("process_asconf_set_primary: set primary failed!\n"); 554 } 555 #endif /* SCTP_DEBUG */ 556 /* must have been an invalid address, so report */ 557 m_reply = sctp_asconf_error_response(aph->correlation_id, 558 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 559 aparam_length); 560 } 561 562 return m_reply; 563 } 564 565 /* 566 * handles an ASCONF chunk 567 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 568 */ 569 void 570 sctp_handle_asconf(struct mbuf *m, unsigned int offset, struct sctp_asconf_chunk *cp, 571 struct sctp_tcb *stcb, struct sctp_nets *net) 572 { 573 struct sctp_association *asoc; 574 uint32_t serial_num; 575 struct mbuf *m_ack, *m_result, *m_tail; 576 struct sctp_asconf_ack_chunk *ack_cp; 577 struct sctp_asconf_paramhdr *aph, *ack_aph; 578 struct sctp_ipv6addr_param *p_addr; 579 unsigned int asconf_limit; 580 int error = 0; /* did an error occur? */ 581 /* asconf param buffer */ 582 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER]; 583 584 /* verify minimum length */ 585 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 586 #ifdef SCTP_DEBUG 587 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 588 printf("handle_asconf: chunk too small = %xh\n", 589 ntohs(cp->ch.chunk_length)); 590 } 591 #endif /* SCTP_DEBUG */ 592 return; 593 } 594 595 asoc = &stcb->asoc; 596 serial_num = ntohl(cp->serial_number); 597 598 if (serial_num == asoc->asconf_seq_in) { 599 /* got a duplicate ASCONF */ 600 #ifdef SCTP_DEBUG 601 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 602 printf("handle_asconf: got duplicate serial number = %xh\n", 603 serial_num); 604 } 605 #endif /* SCTP_DEBUG */ 606 /* resend last ASCONF-ACK... */ 607 sctp_send_asconf_ack(stcb, 1); 608 return; 609 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 610 #ifdef SCTP_DEBUG 611 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 612 printf("handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 613 serial_num, asoc->asconf_seq_in+1); 614 } 615 #endif /* SCTP_DEBUG */ 616 return; 617 } 618 619 /* it's the expected "next" sequence number, so process it */ 620 asoc->asconf_seq_in = serial_num; /* update sequence */ 621 /* get length of all the param's in the ASCONF */ 622 asconf_limit = offset + ntohs(cp->ch.chunk_length); 623 #ifdef SCTP_DEBUG 624 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 625 printf("handle_asconf: asconf_limit=%u, sequence=%xh\n", 626 asconf_limit, serial_num); 627 } 628 #endif /* SCTP_DEBUG */ 629 if (asoc->last_asconf_ack_sent != NULL) { 630 /* free last ASCONF-ACK message sent */ 631 sctp_m_freem(asoc->last_asconf_ack_sent); 632 asoc->last_asconf_ack_sent = NULL; 633 } 634 MGETHDR(m_ack, M_DONTWAIT, MT_DATA); 635 if (m_ack == NULL) { 636 #ifdef SCTP_DEBUG 637 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 638 printf("handle_asconf: couldn't get mbuf!\n"); 639 } 640 #endif /* SCTP_DEBUG */ 641 return; 642 } 643 m_tail = m_ack; /* current reply chain's tail */ 644 645 /* fill in ASCONF-ACK header */ 646 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 647 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 648 ack_cp->ch.chunk_flags = 0; 649 ack_cp->serial_number = htonl(serial_num); 650 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 651 m_ack->m_len = sizeof(struct sctp_asconf_ack_chunk); 652 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 653 m_ack->m_pkthdr.len = sizeof(struct sctp_asconf_ack_chunk); 654 655 /* skip the lookup address parameter */ 656 offset += sizeof(struct sctp_asconf_chunk); 657 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); 658 if (p_addr == NULL) { 659 #ifdef SCTP_DEBUG 660 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 661 printf("handle_asconf: couldn't get lookup addr!\n"); 662 } 663 #endif /* SCTP_DEBUG */ 664 665 /* respond with a missing/invalid mandatory parameter error */ 666 return; 667 } 668 /* param_length is already validated in process_control... */ 669 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 670 671 /* get pointer to first asconf param in ASCONF */ 672 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); 673 /* get pointer to first asconf param in ASCONF-ACK */ 674 if (aph == NULL) { 675 printf("Gak in asconf\n"); 676 return; 677 } 678 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, vaddr_t) + sizeof(struct sctp_asconf_ack_chunk)); 679 if (ack_aph == NULL) { 680 printf("Gak in asconf2\n"); 681 return; 682 } 683 684 /* process through all parameters */ 685 while (aph != NULL) { 686 unsigned int param_length, param_type; 687 688 param_type = ntohs(aph->ph.param_type); 689 param_length = ntohs(aph->ph.param_length); 690 if (offset + param_length > asconf_limit) { 691 /* parameter goes beyond end of chunk! */ 692 sctp_m_freem(m_ack); 693 return; 694 } 695 m_result = NULL; 696 697 if (param_length > sizeof(aparam_buf)) { 698 #ifdef SCTP_DEBUG 699 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 700 printf("handle_asconf: param length (%u) larger than buffer size!\n", param_length); 701 } 702 #endif /* SCTP_DEBUG */ 703 sctp_m_freem(m_ack); 704 return; 705 } 706 if (param_length <= sizeof(struct sctp_paramhdr)) { 707 #ifdef SCTP_DEBUG 708 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 709 printf("handle_asconf: param length (%u) too short\n", param_length); 710 } 711 #endif /* SCTP_DEBUG */ 712 sctp_m_freem(m_ack); 713 } 714 715 /* get the entire parameter */ 716 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 717 if (aph == NULL) { 718 printf("Gag\n"); 719 sctp_m_freem(m_ack); 720 return; 721 } 722 switch (param_type) { 723 case SCTP_ADD_IP_ADDRESS: 724 asoc->peer_supports_asconf = 1; 725 m_result = sctp_process_asconf_add_ip(aph, stcb, error); 726 break; 727 case SCTP_DEL_IP_ADDRESS: 728 asoc->peer_supports_asconf = 1; 729 m_result = sctp_process_asconf_delete_ip(m, aph, stcb, 730 error); 731 break; 732 case SCTP_ERROR_CAUSE_IND: 733 /* not valid in an ASCONF chunk */ 734 break; 735 case SCTP_SET_PRIM_ADDR: 736 asoc->peer_supports_asconf_setprim = 1; 737 m_result = sctp_process_asconf_set_primary(aph, stcb, 738 error); 739 break; 740 case SCTP_SUCCESS_REPORT: 741 /* not valid in an ASCONF chunk */ 742 break; 743 case SCTP_ULP_ADAPTION: 744 /* FIX */ 745 break; 746 default: 747 if ((param_type & 0x8000) == 0) { 748 /* Been told to STOP at this param */ 749 asconf_limit = offset; 750 /* FIX FIX - We need to call sctp_arethere_unrecognized_parameters() 751 * to get a operr and send it for any param's with the 752 * 0x4000 bit set OR do it here ourselves... note we still 753 * must STOP if the 0x8000 bit is clear. 754 */ 755 } 756 /* unknown/invalid param type */ 757 break; 758 } /* switch */ 759 760 /* add any (error) result to the reply mbuf chain */ 761 if (m_result != NULL) { 762 #ifdef SCTP_DEBUG 763 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 764 printf("handle_asconf: adding reply...\n"); 765 } 766 #endif /* SCTP_DEBUG */ 767 m_tail->m_next = m_result; 768 m_tail = m_result; 769 /* update lengths, make sure it's aligned too */ 770 m_result->m_len = SCTP_SIZE32(m_result->m_len); 771 m_ack->m_pkthdr.len += m_result->m_len; 772 ack_cp->ch.chunk_length += m_result->m_len; 773 /* set flag to force success reports */ 774 error = 1; 775 } 776 777 offset += SCTP_SIZE32(param_length); 778 /* update remaining ASCONF message length to process */ 779 if (offset >= asconf_limit) { 780 /* no more data in the mbuf chain */ 781 break; 782 } 783 /* get pointer to next asconf param */ 784 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 785 sizeof(struct sctp_asconf_paramhdr), 786 (uint8_t *)&aparam_buf); 787 if (aph == NULL) { 788 /* can't get an asconf paramhdr */ 789 #ifdef SCTP_DEBUG 790 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 791 printf("handle_asconf: can't get asconf param hdr!\n"); 792 } 793 #endif /* SCTP_DEBUG */ 794 /* FIX ME - add error here... */ 795 } 796 } /* while */ 797 798 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 799 /* save the ASCONF-ACK reply */ 800 asoc->last_asconf_ack_sent = m_ack; 801 /* and send (a new one) it out... */ 802 sctp_send_asconf_ack(stcb, 0); 803 } 804 805 /* 806 * does the address match? 807 * returns 0 if not, 1 if so 808 */ 809 static uint32_t 810 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 811 { 812 #ifdef INET6 813 if (sa->sa_family == AF_INET6) { 814 /* IPv6 sa address */ 815 /* XXX scopeid */ 816 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 817 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 818 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 819 sizeof(struct in6_addr)) == 0)) { 820 return (1); 821 } 822 } else 823 #endif /* INET6 */ 824 if (sa->sa_family == AF_INET) { 825 /* IPv4 sa address */ 826 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 827 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 828 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 829 sizeof(struct in_addr)) == 0)) { 830 return (1); 831 } 832 } 833 return (0); 834 } 835 836 /* 837 * Cleanup for non-responded/OP ERR'd ASCONF 838 */ 839 void 840 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 841 { 842 #ifdef SCTP_DEBUG 843 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 844 printf("asconf_cleanup: marking peer ASCONF incapable and cleaning up\n"); 845 } 846 #endif /* SCTP_DEBUG */ 847 /* mark peer as ASCONF incapable */ 848 stcb->asoc.peer_supports_asconf = 0; 849 stcb->asoc.peer_supports_asconf_setprim = 0; 850 /* 851 * clear out any existing asconfs going out 852 */ 853 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net); 854 stcb->asoc.asconf_seq_out++; 855 /* remove the old ASCONF on our outbound queue */ 856 sctp_toss_old_asconf(stcb); 857 } 858 859 /* 860 * process an ADD/DELETE IP ack from peer 861 * ifa: corresponding ifaddr to the address being added/deleted 862 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS 863 * flag: 1=success, 0=failure 864 */ 865 static void 866 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct ifaddr *addr, 867 uint16_t type, uint32_t flag) 868 { 869 870 /* 871 * do the necessary asoc list work- 872 * if we get a failure indication, leave the address on the 873 * "do not use" asoc list 874 * if we get a success indication, remove the address from 875 * the list 876 */ 877 /* 878 * Note: this will only occur for ADD_IP_ADDRESS, since 879 * DEL_IP_ADDRESS is never actually added to the list... 880 */ 881 if (flag) { 882 /* success case, so remove from the list */ 883 sctp_del_local_addr_assoc(stcb, addr); 884 } 885 /* else, leave it on the list */ 886 } 887 888 /* 889 * add an asconf add/delete IP address parameter to the queue 890 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR 891 * returns 0 if completed, non-zero if not completed 892 * NOTE: if adding, but delete already scheduled (and not yet 893 * sent out), simply remove from queue. Same for deleting 894 * an address already scheduled for add. If a duplicate 895 * operation is found, ignore the new one. 896 */ 897 static uint32_t 898 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct ifaddr *ifa, uint16_t type) 899 { 900 struct sctp_asconf_addr *aa, *aa_next; 901 #ifdef SCTP_DEBUG 902 char buf[128]; /* for address in string format */ 903 #endif /* SCTP_DEBUG */ 904 905 /* see if peer supports ASCONF */ 906 if (stcb->asoc.peer_supports_asconf == 0) { 907 #ifdef SCTP_DEBUG 908 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 909 printf("asconf_queue_add: peer doesn't support ASCONF\n"); 910 } 911 #endif /* SCTP_DEBUG */ 912 return (-1); 913 } 914 915 /* make sure the request isn't already in the queue */ 916 for (aa=TAILQ_FIRST(&stcb->asoc.asconf_queue); aa!=NULL; aa=aa_next) { 917 aa_next = TAILQ_NEXT(aa, next); 918 /* address match? */ 919 if (sctp_asconf_addr_match(aa, ifa->ifa_addr) == 0) 920 continue; 921 /* is the request already in queue (sent or not) */ 922 if (aa->ap.aph.ph.param_type == type) { 923 #ifdef SCTP_DEBUG 924 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 925 printf("asconf_queue_add: request already exists\n"); 926 } 927 #endif /* SCTP_DEBUG */ 928 return (-1); 929 } 930 /* is the negative request already in queue, and not sent */ 931 if (aa->sent == 0 && 932 /* add requested, delete already queued */ 933 ((type == SCTP_ADD_IP_ADDRESS && 934 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) || 935 /* delete requested, add already queued */ 936 (type == SCTP_DEL_IP_ADDRESS && 937 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS))) { 938 /* delete the existing entry in the queue */ 939 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 940 /* take the entry off the appropriate list */ 941 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1); 942 /* free the entry */ 943 free(aa, M_PCB); 944 945 #ifdef SCTP_DEBUG 946 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 947 printf("asconf_queue_add: removing 'opposite' queued request\n"); 948 } 949 #endif /* SCTP_DEBUG */ 950 return (-1); 951 } 952 } /* for each aa */ 953 954 /* adding new request to the queue */ 955 aa = malloc(sizeof(*aa), M_PCB, M_NOWAIT); 956 if (aa == NULL) { 957 /* didn't get memory */ 958 #ifdef SCTP_DEBUG 959 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 960 printf("asconf_queue_add: failed to get memory!\n"); 961 } 962 #endif /* SCTP_DEBUG */ 963 return (-1); 964 } 965 /* fill in asconf address parameter fields */ 966 /* top level elements are "networked" during send */ 967 aa->ap.aph.ph.param_type = type; 968 aa->ifa = ifa; 969 /* correlation_id filled in during send routine later... */ 970 if (ifa->ifa_addr->sa_family == AF_INET6) { 971 /* IPv6 address */ 972 #ifdef SCTP_DEBUG 973 char ip6buf[INET6_ADDRSTRLEN]; 974 #endif 975 struct sockaddr_in6 *sin6; 976 977 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 978 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 979 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 980 aa->ap.aph.ph.param_length = 981 sizeof(struct sctp_asconf_paramhdr) + 982 sizeof(struct sctp_ipv6addr_param); 983 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 984 sizeof(struct in6_addr)); 985 #ifdef SCTP_DEBUG 986 strlcpy(buf, IN6_PRINT(ip6buf, &sin6->sin6_addr), sizeof(buf)); 987 #endif /* SCTP_DEBUG */ 988 989 } else if (ifa->ifa_addr->sa_family == AF_INET) { 990 /* IPv4 address */ 991 struct sockaddr_in *sin = (struct sockaddr_in *)ifa->ifa_addr; 992 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 993 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 994 aa->ap.aph.ph.param_length = 995 sizeof(struct sctp_asconf_paramhdr) + 996 sizeof(struct sctp_ipv4addr_param); 997 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 998 sizeof(struct in_addr)); 999 #ifdef SCTP_DEBUG 1000 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf)); 1001 #endif /* SCTP_DEBUG */ 1002 } else { 1003 /* invalid family! */ 1004 return (-1); 1005 } 1006 aa->sent = 0; /* clear sent flag */ 1007 1008 /* 1009 * if we are deleting an address it should go out last 1010 * otherwise, add it to front of the pending queue 1011 */ 1012 if (type == SCTP_ADD_IP_ADDRESS) { 1013 /* add goes to the front of the queue */ 1014 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next); 1015 #ifdef SCTP_DEBUG 1016 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1017 printf("asconf_queue_add: appended asconf ADD_IP_ADDRESS: %s\n", buf); 1018 } 1019 #endif /* SCTP_DEBUG */ 1020 } else { 1021 /* delete and set primary goes to the back of the queue */ 1022 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1023 #ifdef SCTP_DEBUG 1024 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1025 if (type == SCTP_DEL_IP_ADDRESS) { 1026 printf("asconf_queue_add: inserted asconf DEL_IP_ADDRESS: %s\n", buf); 1027 } else { 1028 printf("asconf_queue_add: inserted asconf SET_PRIM_ADDR: %s\n", buf); 1029 } 1030 } 1031 #endif /* SCTP_DEBUG */ 1032 } 1033 1034 return (0); 1035 } 1036 1037 /* 1038 * add an asconf add/delete IP address parameter to the queue by addr 1039 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR 1040 * returns 0 if completed, non-zero if not completed 1041 * NOTE: if adding, but delete already scheduled (and not yet 1042 * sent out), simply remove from queue. Same for deleting 1043 * an address already scheduled for add. If a duplicate 1044 * operation is found, ignore the new one. 1045 */ 1046 static uint32_t 1047 sctp_asconf_queue_add_sa(struct sctp_tcb *stcb, struct sockaddr *sa, 1048 uint16_t type) 1049 { 1050 struct sctp_asconf_addr *aa, *aa_next; 1051 1052 /* see if peer supports ASCONF */ 1053 if (stcb->asoc.peer_supports_asconf == 0) { 1054 #ifdef SCTP_DEBUG 1055 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1056 printf("asconf_queue_add_sa: peer doesn't support ASCONF\n"); 1057 } 1058 #endif /* SCTP_DEBUG */ 1059 return (-1); 1060 } 1061 1062 /* make sure the request isn't already in the queue */ 1063 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1064 aa = aa_next) { 1065 aa_next = TAILQ_NEXT(aa, next); 1066 /* address match? */ 1067 if (sctp_asconf_addr_match(aa, sa) == 0) 1068 continue; 1069 /* is the request already in queue (sent or not) */ 1070 if (aa->ap.aph.ph.param_type == type) { 1071 #ifdef SCTP_DEBUG 1072 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1073 printf("asconf_queue_add_sa: request already exists\n"); 1074 } 1075 #endif /* SCTP_DEBUG */ 1076 return (-1); 1077 } 1078 1079 /* is the negative request already in queue, and not sent */ 1080 if (aa->sent == 1) 1081 continue; 1082 if (type == SCTP_ADD_IP_ADDRESS && 1083 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1084 /* add requested, delete already queued */ 1085 1086 /* delete the existing entry in the queue */ 1087 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1088 /* free the entry */ 1089 free(aa, M_PCB); 1090 #ifdef SCTP_DEBUG 1091 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1092 printf("asconf_queue_add_sa: removing queued delete request\n"); 1093 } 1094 #endif /* SCTP_DEBUG */ 1095 return (-1); 1096 } else if (type == SCTP_DEL_IP_ADDRESS && 1097 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1098 /* delete requested, add already queued */ 1099 1100 /* delete the existing entry in the queue */ 1101 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1102 /* take the entry off the appropriate list */ 1103 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1); 1104 /* free the entry */ 1105 free(aa, M_PCB); 1106 #ifdef SCTP_DEBUG 1107 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1108 printf("asconf_queue_add_sa: removing queued add request\n"); 1109 } 1110 #endif /* SCTP_DEBUG */ 1111 return (-1); 1112 } 1113 } /* for each aa */ 1114 1115 /* adding new request to the queue */ 1116 aa = malloc(sizeof(*aa), M_PCB, M_NOWAIT); 1117 if (aa == NULL) { 1118 /* didn't get memory */ 1119 #ifdef SCTP_DEBUG 1120 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1121 printf("asconf_queue_add_sa: failed to get memory!\n"); 1122 } 1123 #endif /* SCTP_DEBUG */ 1124 return (-1); 1125 } 1126 /* fill in asconf address parameter fields */ 1127 /* top level elements are "networked" during send */ 1128 aa->ap.aph.ph.param_type = type; 1129 aa->ifa = sctp_find_ifa_by_addr(sa); 1130 /* correlation_id filled in during send routine later... */ 1131 if (sa->sa_family == AF_INET6) { 1132 /* IPv6 address */ 1133 struct sockaddr_in6 *sin6; 1134 1135 sin6 = (struct sockaddr_in6 *)sa; 1136 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1137 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1138 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1139 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1140 sizeof(struct in6_addr)); 1141 } else if (sa->sa_family == AF_INET) { 1142 /* IPv4 address */ 1143 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1144 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1145 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1146 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1147 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1148 sizeof(struct in_addr)); 1149 } else { 1150 /* invalid family! */ 1151 return (-1); 1152 } 1153 aa->sent = 0; /* clear sent flag */ 1154 1155 /* 1156 * if we are deleting an address it should go out last 1157 * otherwise, add it to front of the pending queue 1158 */ 1159 if (type == SCTP_ADD_IP_ADDRESS) { 1160 /* add goes to the front of the queue */ 1161 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next); 1162 #ifdef SCTP_DEBUG 1163 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1164 printf("asconf_queue_add_sa: appended asconf ADD_IP_ADDRESS\n"); 1165 } 1166 #endif /* SCTP_DEBUG */ 1167 } else { 1168 /* delete and set primary goes to the back of the queue */ 1169 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1170 #ifdef SCTP_DEBUG 1171 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1172 if (type == SCTP_DEL_IP_ADDRESS) { 1173 printf("asconf_queue_add_sa: inserted asconf DEL_IP_ADDRESS\n"); 1174 } else { 1175 printf("asconf_queue_add_sa: inserted asconf SET_PRIM_ADDR\n"); 1176 } 1177 } 1178 #endif /* SCTP_DEBUG */ 1179 } 1180 1181 return (0); 1182 } 1183 1184 /* 1185 * find a specific asconf param on our "sent" queue 1186 */ 1187 static struct sctp_asconf_addr * 1188 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1189 { 1190 struct sctp_asconf_addr *aa; 1191 1192 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1193 if (aa->ap.aph.correlation_id == correlation_id && 1194 aa->sent == 1) { 1195 /* found it */ 1196 return (aa); 1197 } 1198 } 1199 /* didn't find it */ 1200 return (NULL); 1201 } 1202 1203 /* 1204 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter 1205 * and do notifications based on the error response 1206 */ 1207 static void 1208 sctp_asconf_process_error(struct sctp_tcb *stcb, 1209 struct sctp_asconf_paramhdr *aph) 1210 { 1211 struct sctp_error_cause *eh; 1212 struct sctp_paramhdr *ph; 1213 uint16_t param_type; 1214 uint16_t error_code; 1215 1216 eh = (struct sctp_error_cause *)(aph + 1); 1217 ph = (struct sctp_paramhdr *)(eh + 1); 1218 /* validate lengths */ 1219 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1220 htons(aph->ph.param_length)) { 1221 /* invalid error cause length */ 1222 #ifdef SCTP_DEBUG 1223 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1224 printf("asconf_process_error: cause element too long\n"); 1225 } 1226 #endif /* SCTP_DEBUG */ 1227 return; 1228 } 1229 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1230 htons(eh->length)) { 1231 /* invalid included TLV length */ 1232 #ifdef SCTP_DEBUG 1233 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1234 printf("asconf_process_error: included TLV too long\n"); 1235 } 1236 #endif /* SCTP_DEBUG */ 1237 return; 1238 } 1239 1240 /* which error code ? */ 1241 error_code = ntohs(eh->code); 1242 param_type = ntohs(aph->ph.param_type); 1243 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1244 switch (error_code) { 1245 case SCTP_ERROR_RESOURCE_SHORTAGE: 1246 /* we allow ourselves to "try again" for this error */ 1247 break; 1248 default: 1249 /* peer can't handle it... */ 1250 switch (param_type) { 1251 case SCTP_ADD_IP_ADDRESS: 1252 case SCTP_DEL_IP_ADDRESS: 1253 stcb->asoc.peer_supports_asconf = 0; 1254 break; 1255 case SCTP_SET_PRIM_ADDR: 1256 stcb->asoc.peer_supports_asconf_setprim = 0; 1257 break; 1258 default: 1259 break; 1260 } 1261 } 1262 } 1263 1264 /* 1265 * process an asconf queue param 1266 * aparam: parameter to process, will be removed from the queue 1267 * flag: 1=success, 0=failure 1268 */ 1269 static void 1270 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1271 struct sctp_asconf_addr *aparam, uint32_t flag) 1272 { 1273 uint16_t param_type; 1274 1275 /* process this param */ 1276 param_type = aparam->ap.aph.ph.param_type; 1277 #ifdef SCTP_DEBUG 1278 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1279 printf("process_param_ack: handling asconf parameter type=%xh\n", param_type); 1280 } 1281 #endif /* SCTP_DEBUG */ 1282 switch (param_type) { 1283 case SCTP_ADD_IP_ADDRESS: 1284 #ifdef SCTP_DEBUG 1285 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1286 printf("process_param_ack: added IP address\n"); 1287 } 1288 #endif /* SCTP_DEBUG */ 1289 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag); 1290 break; 1291 case SCTP_DEL_IP_ADDRESS: 1292 #ifdef SCTP_DEBUG 1293 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1294 printf("process_param_ack: deleted IP address\n"); 1295 } 1296 #endif /* SCTP_DEBUG */ 1297 /* nothing really to do... lists already updated */ 1298 break; 1299 case SCTP_SET_PRIM_ADDR: 1300 /* nothing to do... peer may start using this addr */ 1301 if (flag == 0) 1302 stcb->asoc.peer_supports_asconf_setprim = 0; 1303 break; 1304 default: 1305 /* should NEVER happen */ 1306 break; 1307 } /* switch */ 1308 1309 /* remove the param and free it */ 1310 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1311 free(aparam, M_PCB); 1312 } 1313 1314 /* 1315 * cleanup from a bad asconf ack parameter 1316 */ 1317 static void 1318 sctp_asconf_ack_clear(struct sctp_tcb *stcb) 1319 { 1320 /* assume peer doesn't really know how to do asconfs */ 1321 stcb->asoc.peer_supports_asconf = 0; 1322 stcb->asoc.peer_supports_asconf_setprim = 0; 1323 /* XXX we could free the pending queue here */ 1324 } 1325 1326 void 1327 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1328 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1329 struct sctp_nets *net) 1330 { 1331 struct sctp_association *asoc; 1332 uint32_t serial_num; 1333 uint16_t ack_length; 1334 struct sctp_asconf_paramhdr *aph; 1335 struct sctp_asconf_addr *aa, *aa_next; 1336 uint32_t last_error_id = 0; /* last error correlation id */ 1337 uint32_t id; 1338 struct sctp_asconf_addr *ap; 1339 /* asconf param buffer */ 1340 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER]; 1341 1342 /* verify minimum length */ 1343 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1344 #ifdef SCTP_DEBUG 1345 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1346 printf("handle_asconf_ack: chunk too small = %xh\n", 1347 ntohs(cp->ch.chunk_length)); 1348 } 1349 #endif /* SCTP_DEBUG */ 1350 return; 1351 } 1352 1353 asoc = &stcb->asoc; 1354 serial_num = ntohl(cp->serial_number); 1355 1356 /* 1357 * NOTE: we may want to handle this differently- currently, we 1358 * will abort when we get an ack for the expected serial number + 1 1359 * (eg. we didn't send it), process an ack normally if it is the 1360 * expected serial number, and re-send the previous ack for *ALL* 1361 * other serial numbers 1362 */ 1363 1364 /* 1365 * if the serial number is the next expected, but I didn't send it, 1366 * abort the asoc, since someone probably just hijacked us... 1367 */ 1368 if (serial_num == (asoc->asconf_seq_out + 1)) { 1369 sctp_abort_an_association(stcb->sctp_ep, stcb, 1370 SCTP_ERROR_ILLEGAL_ASCONF_ACK, NULL); 1371 #ifdef SCTP_DEBUG 1372 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1373 printf("handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1374 } 1375 #endif /* SCTP_DEBUG */ 1376 return; 1377 } 1378 1379 if (serial_num != asoc->asconf_seq_out) { 1380 /* got a duplicate/unexpected ASCONF-ACK */ 1381 #ifdef SCTP_DEBUG 1382 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1383 printf("handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", serial_num, asoc->asconf_seq_out); 1384 } 1385 #endif /* SCTP_DEBUG */ 1386 return; 1387 } 1388 /* stop our timer */ 1389 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net); 1390 1391 /* process the ASCONF-ACK contents */ 1392 ack_length = ntohs(cp->ch.chunk_length) - 1393 sizeof(struct sctp_asconf_ack_chunk); 1394 offset += sizeof(struct sctp_asconf_ack_chunk); 1395 /* process through all parameters */ 1396 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1397 unsigned int param_length, param_type; 1398 1399 /* get pointer to next asconf parameter */ 1400 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1401 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1402 if (aph == NULL) { 1403 /* can't get an asconf paramhdr */ 1404 sctp_asconf_ack_clear(stcb); 1405 return; 1406 } 1407 param_type = ntohs(aph->ph.param_type); 1408 param_length = ntohs(aph->ph.param_length); 1409 if (param_length > ack_length) { 1410 sctp_asconf_ack_clear(stcb); 1411 return; 1412 } 1413 if (param_length < sizeof(struct sctp_paramhdr)) { 1414 sctp_asconf_ack_clear(stcb); 1415 return; 1416 } 1417 1418 /* get the complete parameter... */ 1419 if (param_length > sizeof(aparam_buf)) { 1420 #ifdef SCTP_DEBUG 1421 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1422 printf("param length (%u) larger than buffer size!\n", param_length); 1423 } 1424 #endif /* SCTP_DEBUG */ 1425 sctp_asconf_ack_clear(stcb); 1426 return; 1427 } 1428 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1429 if (aph == NULL) { 1430 sctp_asconf_ack_clear(stcb); 1431 return; 1432 } 1433 /* correlation_id is transparent to peer, no ntohl needed */ 1434 id = aph->correlation_id; 1435 1436 switch (param_type) { 1437 case SCTP_ERROR_CAUSE_IND: 1438 last_error_id = id; 1439 /* find the corresponding asconf param in our queue */ 1440 ap = sctp_asconf_find_param(stcb, id); 1441 if (ap == NULL) { 1442 /* hmm... can't find this in our queue! */ 1443 break; 1444 } 1445 /* process the parameter, failed flag */ 1446 sctp_asconf_process_param_ack(stcb, ap, 0); 1447 /* process the error response */ 1448 sctp_asconf_process_error(stcb, aph); 1449 break; 1450 case SCTP_SUCCESS_REPORT: 1451 /* find the corresponding asconf param in our queue */ 1452 ap = sctp_asconf_find_param(stcb, id); 1453 if (ap == NULL) { 1454 /* hmm... can't find this in our queue! */ 1455 break; 1456 } 1457 /* process the parameter, success flag */ 1458 sctp_asconf_process_param_ack(stcb, ap, 1); 1459 break; 1460 default: 1461 break; 1462 } /* switch */ 1463 1464 /* update remaining ASCONF-ACK message length to process */ 1465 ack_length -= SCTP_SIZE32(param_length); 1466 if (ack_length <= 0) { 1467 /* no more data in the mbuf chain */ 1468 break; 1469 } 1470 offset += SCTP_SIZE32(param_length); 1471 } /* while */ 1472 1473 /* 1474 * if there are any "sent" params still on the queue, these are 1475 * implicitly "success", or "failed" (if we got an error back) 1476 * ... so process these appropriately 1477 * 1478 * we assume that the correlation_id's are monotonically increasing 1479 * beginning from 1 and that we don't have *that* many outstanding 1480 * at any given time 1481 */ 1482 if (last_error_id == 0) 1483 last_error_id--; /* set to "max" value */ 1484 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1485 aa = aa_next) { 1486 aa_next = TAILQ_NEXT(aa, next); 1487 if (aa->sent == 1) { 1488 /* 1489 * implicitly successful or failed 1490 * if correlation_id < last_error_id, then success 1491 * else, failure 1492 */ 1493 if (aa->ap.aph.correlation_id < last_error_id) 1494 sctp_asconf_process_param_ack(stcb, aa, 1495 SCTP_SUCCESS_REPORT); 1496 else 1497 sctp_asconf_process_param_ack(stcb, aa, 1498 SCTP_ERROR_CAUSE_IND); 1499 } else { 1500 /* 1501 * since we always process in order (FIFO queue) 1502 * if we reach one that hasn't been sent, the 1503 * rest should not have been sent either. 1504 * so, we're done... 1505 */ 1506 break; 1507 } 1508 } 1509 1510 /* update the next sequence number to use */ 1511 asoc->asconf_seq_out++; 1512 /* remove the old ASCONF on our outbound queue */ 1513 sctp_toss_old_asconf(stcb); 1514 /* clear the sent flag to allow new ASCONFs */ 1515 asoc->asconf_sent = 0; 1516 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1517 /* we have more params, so restart our timer */ 1518 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1519 stcb, net); 1520 } 1521 } 1522 1523 /* is this an interface that we care about at all? */ 1524 static uint32_t 1525 sctp_is_desired_interface_type(struct ifaddr *ifa) 1526 { 1527 int result; 1528 1529 /* check the interface type to see if it's one we care about */ 1530 switch (ifa->ifa_ifp->if_type) { 1531 case IFT_ETHER: 1532 case IFT_ISO88023: 1533 case IFT_ISO88025: 1534 case IFT_STARLAN: 1535 case IFT_P10: 1536 case IFT_P80: 1537 case IFT_HY: 1538 case IFT_FDDI: 1539 case IFT_PPP: 1540 case IFT_XETHER: 1541 case IFT_SLIP: 1542 case IFT_GIF: 1543 result = 1; 1544 break; 1545 default: 1546 #ifdef SCTP_DEBUG 1547 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1548 printf("ignoring interface type = %u\n", 1549 ifa->ifa_ifp->if_type); 1550 } 1551 #endif /* SCTP_DEBUG */ 1552 result = 0; 1553 } /* end switch */ 1554 1555 return (result); 1556 } 1557 1558 static uint32_t 1559 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1560 { 1561 struct sockaddr_in6 *sin6; 1562 const struct sockaddr_in6 *net6; 1563 struct sctp_nets *net; 1564 1565 if (sa->sa_family != AF_INET6) { 1566 /* wrong family */ 1567 return (0); 1568 } 1569 1570 sin6 = (struct sockaddr_in6 *)sa; 1571 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1572 /* not link local address */ 1573 return (0); 1574 } 1575 /* hunt through our destination nets list for this scope_id */ 1576 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1577 if ((rtcache_getdst(&net->ro))->sa_family != 1578 AF_INET6) 1579 continue; 1580 net6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro); 1581 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1582 continue; 1583 if (sctp_is_same_scope(sin6, net6)) { 1584 /* found one */ 1585 return (1); 1586 } 1587 } 1588 /* didn't find one */ 1589 return (0); 1590 } 1591 1592 /* 1593 * address management functions 1594 */ 1595 static void 1596 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1597 struct ifaddr *ifa, uint16_t type) 1598 { 1599 int status; 1600 #ifdef SCTP_DEBUG 1601 char buf[128]; /* for address in string format */ 1602 #endif /* SCTP_DEBUG */ 1603 1604 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 && 1605 (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) { 1606 /* subset bound, no ASCONF allowed case, so ignore */ 1607 return; 1608 } 1609 1610 /* 1611 * note: we know this is not the subset bound, no ASCONF case 1612 * eg. this is boundall or subset bound w/ASCONF allowed 1613 */ 1614 1615 /* first, make sure it's a good address family */ 1616 if (ifa->ifa_addr->sa_family != AF_INET6 && 1617 ifa->ifa_addr->sa_family != AF_INET) { 1618 return; 1619 } 1620 1621 /* make sure we're "allowed" to add this type of addr */ 1622 if (ifa->ifa_addr->sa_family == AF_INET6) { 1623 struct in6_ifaddr *ifa6; 1624 1625 /* invalid if we're not a v6 endpoint */ 1626 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1627 return; 1628 /* is the v6 addr really valid ? */ 1629 ifa6 = (struct in6_ifaddr *)ifa; 1630 if (IFA6_IS_DEPRECATED(ifa6) || 1631 (ifa6->ia6_flags & 1632 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) { 1633 /* can't use an invalid address */ 1634 return; 1635 } 1636 } 1637 1638 /* put this address on the "pending/do not use yet" list */ 1639 /* 1640 * Note: we do this primarily for the subset bind case 1641 * We don't have scoping flags at the EP level, so we must 1642 * add link local/site local addresses to the EP, then need 1643 * to "negate" them here. Recall that this routine is only 1644 * called for the subset bound w/ASCONF allowed case. 1645 */ 1646 1647 /* 1648 * do a scope_id check against any link local addresses 1649 * in the destination nets list to see if we should put 1650 * this local address on the pending list or not 1651 * eg. don't put on the list if we have a link local 1652 * destination with the same scope_id 1653 */ 1654 if (type == SCTP_ADD_IP_ADDRESS) { 1655 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) { 1656 sctp_add_local_addr_assoc(stcb, ifa); 1657 #ifdef SCTP_DEBUG 1658 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1659 printf("addr_mgmt_assoc: added to pending list "); 1660 sctp_print_address(ifa->ifa_addr); 1661 } 1662 #endif /* SCTP_DEBUG */ 1663 } 1664 } 1665 /* 1666 * check address scope 1667 * if address is out of scope, don't queue anything... 1668 * note: this would leave the address on both inp and asoc lists 1669 */ 1670 if (ifa->ifa_addr->sa_family == AF_INET6) { 1671 #ifdef SCTP_DEBUG 1672 char ip6buf[INET6_ADDRSTRLEN]; 1673 #endif /* SCTP_DEBUG */ 1674 struct sockaddr_in6 *sin6; 1675 1676 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1677 #ifdef SCTP_DEBUG 1678 strlcpy(buf, IN6_PRINT(ip6buf, &sin6->sin6_addr), sizeof(buf)); 1679 #endif /* SCTP_DEBUG */ 1680 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1681 /* we skip unspecified addresses */ 1682 #ifdef SCTP_DEBUG 1683 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1684 printf("addr_mgmt_assoc: unspecified IPv6 addr\n"); 1685 } 1686 #endif /* SCTP_DEBUG */ 1687 return; 1688 } 1689 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1690 if (stcb->asoc.local_scope == 0) { 1691 #ifdef SCTP_DEBUG 1692 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1693 printf("addr_mgmt_assoc: skipping link local IPv6 addr: %s\n", buf); 1694 } 1695 #endif /* SCTP_DEBUG */ 1696 return; 1697 } 1698 /* is it the right link local scope? */ 1699 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) { 1700 #ifdef SCTP_DEBUG 1701 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1702 printf("addr_mgmt_assoc: skipping link local IPv6 addr: %s, wrong scope_id\n", buf); 1703 } 1704 #endif /* SCTP_DEBUG */ 1705 return; 1706 } 1707 } 1708 if (stcb->asoc.site_scope == 0 && 1709 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1710 #ifdef SCTP_DEBUG 1711 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1712 printf("addr_mgmt_assoc: skipping site local IPv6 addr: %s\n", buf); 1713 } 1714 #endif /* SCTP_DEBUG */ 1715 return; 1716 } 1717 } else if (ifa->ifa_addr->sa_family == AF_INET) { 1718 struct sockaddr_in *sin; 1719 struct in6pcb *inp6; 1720 1721 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1722 /* invalid if we are a v6 only endpoint */ 1723 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1724 (inp6->in6p_flags & IN6P_IPV6_V6ONLY) 1725 ) 1726 return; 1727 1728 sin = (struct sockaddr_in *)ifa->ifa_addr; 1729 #ifdef SCTP_DEBUG 1730 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf)); 1731 #endif /* SCTP_DEBUG */ 1732 if (sin->sin_addr.s_addr == 0) { 1733 /* we skip unspecified addresses */ 1734 #ifdef SCTP_DEBUG 1735 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1736 printf("addr_mgmt_assoc: unspecified IPv4 addr\n"); 1737 } 1738 #endif /* SCTP_DEBUG */ 1739 return; 1740 } 1741 if (stcb->asoc.ipv4_local_scope == 0 && 1742 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1743 #ifdef SCTP_DEBUG 1744 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1745 printf("addr_mgmt_assoc: skipping private IPv4 addr: %s\n", buf); 1746 } 1747 #endif /* SCTP_DEBUG */ 1748 return; 1749 } 1750 } else { 1751 /* else, not AF_INET or AF_INET6, so skip */ 1752 #ifdef SCTP_DEBUG 1753 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1754 printf("addr_mgmt_assoc: not AF_INET or AF_INET6\n"); 1755 } 1756 #endif /* SCTP_DEBUG */ 1757 return; 1758 } 1759 1760 /* queue an asconf for this address add/delete */ 1761 if (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) { 1762 /* does the peer do asconf? */ 1763 if (stcb->asoc.peer_supports_asconf) { 1764 /* queue an asconf for this addr */ 1765 status = sctp_asconf_queue_add(stcb, ifa, type); 1766 /* 1767 * if queued ok, and in correct state, set the 1768 * ASCONF timer 1769 * if in non-open state, we will set this timer 1770 * when the state does go open and do all the 1771 * asconf's 1772 */ 1773 if (status == 0 && 1774 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1775 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1776 stcb, stcb->asoc.primary_destination); 1777 } 1778 } 1779 } else { 1780 /* this is the boundall, no ASCONF case */ 1781 #if 0 /* assume kernel will delete this very shortly; add done above */ 1782 if (type == SCTP_DEL_IP_ADDRESS) { 1783 /* if deleting, add this addr to the do not use list */ 1784 sctp_add_local_addr_assoc(stcb, ifa); 1785 } 1786 #endif 1787 } 1788 } 1789 1790 static void 1791 sctp_addr_mgmt_ep(struct sctp_inpcb *inp, struct ifaddr *ifa, uint16_t type) 1792 { 1793 struct sctp_tcb *stcb; 1794 int s; 1795 1796 SCTP_INP_WLOCK(inp); 1797 /* make sure we're "allowed" to add this type of addr */ 1798 if (ifa->ifa_addr->sa_family == AF_INET6) { 1799 struct in6_ifaddr *ifa6; 1800 1801 /* invalid if we're not a v6 endpoint */ 1802 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1803 SCTP_INP_WUNLOCK(inp); 1804 return; 1805 } 1806 /* is the v6 addr really valid ? */ 1807 ifa6 = (struct in6_ifaddr *)ifa; 1808 if (IFA6_IS_DEPRECATED(ifa6) || 1809 (ifa6->ia6_flags & 1810 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) { 1811 /* can't use an invalid address */ 1812 SCTP_INP_WUNLOCK(inp); 1813 return; 1814 } 1815 } else if (ifa->ifa_addr->sa_family == AF_INET) { 1816 /* invalid if we are a v6 only endpoint */ 1817 struct in6pcb *inp6; 1818 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1819 1820 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1821 (inp6->in6p_flags & IN6P_IPV6_V6ONLY) 1822 ) { 1823 SCTP_INP_WUNLOCK(inp); 1824 return; 1825 } 1826 } else { 1827 /* invalid address family */ 1828 SCTP_INP_WUNLOCK(inp); 1829 return; 1830 } 1831 /* is this endpoint subset bound ? */ 1832 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1833 /* subset bound endpoint */ 1834 if ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) { 1835 /* 1836 * subset bound, but ASCONFs not allowed... 1837 * if adding, nothing to do, since not allowed 1838 * if deleting, remove address from endpoint 1839 * peer will have to "timeout" this addr 1840 */ 1841 if (type == SCTP_DEL_IP_ADDRESS) { 1842 sctp_del_local_addr_ep(inp, ifa); 1843 } 1844 /* no asconfs to queue for this inp... */ 1845 SCTP_INP_WUNLOCK(inp); 1846 return; 1847 } else { 1848 /* 1849 * subset bound, ASCONFs allowed... 1850 * if adding, add address to endpoint list 1851 * if deleting, remove address from endpoint 1852 */ 1853 if (type == SCTP_ADD_IP_ADDRESS) { 1854 sctp_add_local_addr_ep(inp, ifa); 1855 } else { 1856 sctp_del_local_addr_ep(inp, ifa); 1857 } 1858 /* drop through and notify all asocs */ 1859 } 1860 } 1861 1862 s = splsoftnet(); 1863 /* process for all associations for this endpoint */ 1864 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 1865 SCTP_TCB_LOCK(stcb); 1866 sctp_addr_mgmt_assoc(inp, stcb, ifa, type); 1867 SCTP_TCB_UNLOCK(stcb); 1868 } /* for each stcb */ 1869 splx(s); 1870 SCTP_INP_WUNLOCK(inp); 1871 } 1872 1873 /* 1874 * restrict the use of this address 1875 */ 1876 static void 1877 sctp_addr_mgmt_restrict_ep(struct sctp_inpcb *inp, struct ifaddr *ifa) 1878 { 1879 struct sctp_tcb *stcb; 1880 int s; 1881 1882 /* is this endpoint bound to all? */ 1883 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1884 /* 1885 * Nothing to do for subset bound case. 1886 * Allow sctp_bindx() to manage the address lists 1887 */ 1888 return; 1889 } 1890 1891 s = splsoftnet(); 1892 SCTP_INP_RLOCK(inp); 1893 /* process for all associations for this endpoint */ 1894 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 1895 /* put this address on the "pending/do not use yet" list */ 1896 SCTP_TCB_LOCK(stcb); 1897 sctp_add_local_addr_assoc(stcb, ifa); 1898 SCTP_TCB_UNLOCK(stcb); 1899 #ifdef SCTP_DEBUG 1900 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1901 printf("restrict_ep: added addr to unusable list\n"); 1902 } 1903 #endif /* SCTP_DEBUG */ 1904 } /* for each stcb */ 1905 splx(s); 1906 SCTP_INP_RUNLOCK(inp); 1907 } 1908 1909 /* 1910 * this is only called for kernel initiated address changes 1911 * eg. it will check the PCB_FLAGS_AUTO_ASCONF flag 1912 */ 1913 static void 1914 sctp_addr_mgmt(struct ifaddr *ifa, uint16_t type) { 1915 struct sockaddr *sa; 1916 struct sctp_inpcb *inp; 1917 1918 /* make sure we care about this interface... */ 1919 if (!sctp_is_desired_interface_type(ifa)) { 1920 #ifdef SCTP_DEBUG 1921 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1922 printf("sctp_addr_mgmt: ignoring this interface\n"); 1923 } 1924 #endif /* SCTP_DEBUG */ 1925 return; 1926 } 1927 1928 sa = ifa->ifa_addr; 1929 if (sa->sa_family != AF_INET && sa->sa_family != AF_INET6) 1930 return; 1931 1932 #ifdef SCTP_DEBUG 1933 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1934 if (type == SCTP_ADD_IP_ADDRESS) 1935 printf("sctp_addr_mgmt: kernel adds "); 1936 else 1937 printf("sctp_addr_mgmt: kernel deletes "); 1938 sctp_print_address(sa); 1939 } 1940 #endif /* SCTP_DEBUG */ 1941 1942 /* go through all our PCB's */ 1943 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 1944 if (inp->sctp_flags & SCTP_PCB_FLAGS_AUTO_ASCONF) { 1945 sctp_addr_mgmt_ep(inp, ifa, type); 1946 } else { 1947 /* this address is going away anyways... */ 1948 if (type == SCTP_DEL_IP_ADDRESS) 1949 return; 1950 /* (temporarily) restrict this address */ 1951 sctp_addr_mgmt_restrict_ep(inp, ifa); 1952 } 1953 /* else, not allowing automatic asconf's, so ignore */ 1954 } /* for each inp */ 1955 } 1956 1957 /* 1958 * add/delete IP address requests from kernel (via routing change) 1959 * assumed that the address is non-broadcast, non-multicast 1960 * all addresses are passed from any type of interface-- need to filter 1961 * duplicate addresses may get requested 1962 */ 1963 1964 void 1965 sctp_add_ip_address(struct ifaddr *ifa) 1966 { 1967 sctp_addr_mgmt(ifa, SCTP_ADD_IP_ADDRESS); 1968 } 1969 1970 void 1971 sctp_delete_ip_address(struct ifaddr *ifa) 1972 { 1973 struct sctp_inpcb *inp; 1974 1975 /* process the delete */ 1976 sctp_addr_mgmt(ifa, SCTP_DEL_IP_ADDRESS); 1977 1978 /* 1979 * need to remove this ifaddr from any cached routes 1980 * and also any from any assoc "restricted/pending" lists 1981 */ 1982 /* make sure we care about this interface... */ 1983 if (!sctp_is_desired_interface_type(ifa)) { 1984 #ifdef SCTP_DEBUG 1985 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1986 printf("sctp_delete_ip_address: ignoring this interface\n"); 1987 } 1988 #endif /* SCTP_DEBUG */ 1989 return; 1990 } 1991 1992 /* go through all our PCB's */ 1993 SCTP_INP_INFO_RLOCK(); 1994 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 1995 struct sctp_tcb *stcb; 1996 struct sctp_laddr *laddr, *laddr_next; 1997 1998 /* process for all associations for this endpoint */ 1999 SCTP_INP_RLOCK(inp); 2000 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2001 struct sctp_nets *net; 2002 2003 /* process through the nets list */ 2004 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2005 rtcache_free(&net->ro); /* XXX - was clear */ 2006 } /* for each net */ 2007 /* process through the asoc "pending" list */ 2008 laddr = LIST_FIRST(&stcb->asoc.sctp_local_addr_list); 2009 while (laddr != NULL) { 2010 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr); 2011 /* remove if in use */ 2012 if (laddr->ifa == ifa) { 2013 sctp_remove_laddr(laddr); 2014 } 2015 laddr = laddr_next; 2016 } /* while */ 2017 } /* for each stcb */ 2018 /* process through the inp bound addr list */ 2019 laddr = LIST_FIRST(&inp->sctp_addr_list); 2020 while (laddr != NULL) { 2021 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr); 2022 /* remove if in use */ 2023 if (laddr->ifa == ifa) { 2024 sctp_remove_laddr(laddr); 2025 } 2026 laddr = laddr_next; 2027 } /* while */ 2028 SCTP_INP_RUNLOCK(inp); 2029 } /* for each inp */ 2030 SCTP_INP_INFO_RUNLOCK(); 2031 } 2032 2033 /* 2034 * sa is the sockaddr to ask the peer to set primary to 2035 * returns: 0 = completed, -1 = error 2036 */ 2037 int32_t 2038 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2039 { 2040 /* NOTE: we currently don't check the validity of the address! */ 2041 2042 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2043 if (!sctp_asconf_queue_add_sa(stcb, sa, SCTP_SET_PRIM_ADDR)) { 2044 /* set primary queuing succeeded */ 2045 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2046 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2047 stcb->sctp_ep, stcb, 2048 stcb->asoc.primary_destination); 2049 } 2050 #ifdef SCTP_DEBUG 2051 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2052 printf("set_primary_ip_address_sa: queued on tcb=%p, ", 2053 stcb); 2054 sctp_print_address(sa); 2055 } 2056 #endif /* SCTP_DEBUG */ 2057 } else { 2058 #ifdef SCTP_DEBUG 2059 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2060 printf("set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2061 stcb); 2062 sctp_print_address(sa); 2063 } 2064 #endif /* SCTP_DEBUG */ 2065 return (-1); 2066 } 2067 return (0); 2068 } 2069 2070 void 2071 sctp_set_primary_ip_address(struct ifaddr *ifa) 2072 { 2073 struct sctp_inpcb *inp; 2074 2075 /* make sure we care about this interface... */ 2076 if (!sctp_is_desired_interface_type(ifa)) { 2077 #ifdef SCTP_DEBUG 2078 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2079 printf("set_primary_ip_address: ignoring this interface\n"); 2080 } 2081 #endif /* SCTP_DEBUG */ 2082 return; 2083 } 2084 2085 /* go through all our PCB's */ 2086 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 2087 struct sctp_tcb *stcb; 2088 2089 /* process for all associations for this endpoint */ 2090 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2091 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2092 if (!sctp_asconf_queue_add(stcb, ifa, 2093 SCTP_SET_PRIM_ADDR)) { 2094 /* set primary queuing succeeded */ 2095 if (SCTP_GET_STATE(&stcb->asoc) == 2096 SCTP_STATE_OPEN) { 2097 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2098 stcb->sctp_ep, stcb, 2099 stcb->asoc.primary_destination); 2100 } 2101 #ifdef SCTP_DEBUG 2102 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2103 printf("set_primary_ip_address: queued on stcb=%p, ", 2104 stcb); 2105 sctp_print_address(ifa->ifa_addr); 2106 } 2107 #endif /* SCTP_DEBUG */ 2108 } else { 2109 #ifdef SCTP_DEBUG 2110 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2111 printf("set_primary_ip_address: failed to add to queue, "); 2112 sctp_print_address(ifa->ifa_addr); 2113 } 2114 #endif /* SCTP_DEBUG */ 2115 } 2116 } /* for each stcb */ 2117 } /* for each inp */ 2118 } 2119 2120 static struct sockaddr * 2121 sctp_find_valid_localaddr(struct sctp_tcb *stcb) 2122 { 2123 struct ifnet *ifn; 2124 struct ifaddr *ifa; 2125 int s; 2126 2127 s = pserialize_read_enter(); 2128 IFNET_READER_FOREACH(ifn) { 2129 if (stcb->asoc.loopback_scope == 0 && ifn->if_type == IFT_LOOP) { 2130 /* Skip if loopback_scope not set */ 2131 continue; 2132 } 2133 IFADDR_READER_FOREACH(ifa, ifn) { 2134 if (ifa->ifa_addr->sa_family == AF_INET && 2135 stcb->asoc.ipv4_addr_legal) { 2136 struct sockaddr_in *sin; 2137 2138 sin = (struct sockaddr_in *)ifa->ifa_addr; 2139 if (sin->sin_addr.s_addr == 0) { 2140 /* skip unspecified addresses */ 2141 continue; 2142 } 2143 if (stcb->asoc.ipv4_local_scope == 0 && 2144 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2145 continue; 2146 2147 if (sctp_is_addr_restricted(stcb, 2148 ifa->ifa_addr)) 2149 continue; 2150 pserialize_read_exit(s); 2151 2152 /* found a valid local v4 address to use */ 2153 return (ifa->ifa_addr); 2154 } else if (ifa->ifa_addr->sa_family == AF_INET6 && 2155 stcb->asoc.ipv6_addr_legal) { 2156 struct sockaddr_in6 *sin6; 2157 struct in6_ifaddr *ifa6; 2158 2159 ifa6 = (struct in6_ifaddr *)ifa; 2160 if (IFA6_IS_DEPRECATED(ifa6) || 2161 (ifa6->ia6_flags & (IN6_IFF_DETACHED | 2162 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) 2163 continue; 2164 2165 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 2166 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2167 /* we skip unspecified addresses */ 2168 continue; 2169 } 2170 if (stcb->asoc.local_scope == 0 && 2171 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2172 continue; 2173 if (stcb->asoc.site_scope == 0 && 2174 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2175 continue; 2176 2177 pserialize_read_exit(s); 2178 /* found a valid local v6 address to use */ 2179 return (ifa->ifa_addr); 2180 } 2181 } 2182 } 2183 pserialize_read_exit(s); 2184 2185 /* no valid addresses found */ 2186 return (NULL); 2187 } 2188 2189 static struct sockaddr * 2190 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2191 { 2192 struct sctp_laddr *laddr; 2193 2194 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2195 if (laddr->ifa == NULL) { 2196 #ifdef SCTP_DEBUG 2197 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2198 printf("find_valid_localaddr_ep: laddr error\n"); 2199 } 2200 #endif /* SCTP_DEBUG */ 2201 continue; 2202 } 2203 if (laddr->ifa->ifa_addr == NULL) { 2204 #ifdef SCTP_DEBUG 2205 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2206 printf("find_valid_localaddr_ep: laddr->ifa error\n"); 2207 } 2208 #endif /* SCTP_DEBUG */ 2209 continue; 2210 } 2211 /* is the address restricted ? */ 2212 if (sctp_is_addr_restricted(stcb, laddr->ifa->ifa_addr)) 2213 continue; 2214 2215 /* found a valid local address to use */ 2216 return (laddr->ifa->ifa_addr); 2217 } 2218 /* no valid addresses found */ 2219 return (NULL); 2220 } 2221 2222 /* 2223 * builds an ASCONF chunk from queued ASCONF params 2224 * returns NULL on error (no mbuf, no ASCONF params queued, etc) 2225 */ 2226 struct mbuf * 2227 sctp_compose_asconf(struct sctp_tcb *stcb) 2228 { 2229 struct mbuf *m_asconf, *m_asconf_chk; 2230 struct sctp_asconf_addr *aa; 2231 struct sctp_asconf_chunk *acp; 2232 struct sctp_asconf_paramhdr *aph; 2233 struct sctp_asconf_addr_param *aap; 2234 uint32_t p_length; 2235 uint32_t correlation_id = 1; /* 0 is reserved... */ 2236 vaddr_t ptr, lookup_ptr; 2237 uint8_t lookup_used = 0; 2238 2239 /* are there any asconf params to send? */ 2240 if (TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 2241 return (NULL); 2242 } 2243 2244 /* 2245 * get a chunk header mbuf and a cluster for the asconf params 2246 * since it's simpler to fill in the asconf chunk header lookup 2247 * address on the fly 2248 */ 2249 m_asconf_chk = NULL; 2250 MGETHDR(m_asconf_chk, M_DONTWAIT, MT_DATA); 2251 if (m_asconf_chk == NULL) { 2252 /* no mbuf's */ 2253 #ifdef SCTP_DEBUG 2254 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2255 printf("compose_asconf: couldn't get chunk mbuf!\n"); 2256 #endif /* SCTP_DEBUG */ 2257 return (NULL); 2258 } 2259 m_asconf = NULL; 2260 MGETHDR(m_asconf, M_DONTWAIT, MT_HEADER); 2261 if (m_asconf == NULL) { 2262 /* no mbuf's */ 2263 #ifdef SCTP_DEBUG 2264 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2265 printf("compose_asconf: couldn't get mbuf!\n"); 2266 #endif /* SCTP_DEBUG */ 2267 sctp_m_freem(m_asconf_chk); 2268 return (NULL); 2269 } 2270 MCLGET(m_asconf, M_DONTWAIT); 2271 if ((m_asconf->m_flags & M_EXT) != M_EXT) { 2272 /* failed to get cluster buffer */ 2273 #ifdef SCTP_DEBUG 2274 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2275 printf("compose_asconf: couldn't get cluster!\n"); 2276 #endif /* SCTP_DEBUG */ 2277 sctp_m_freem(m_asconf_chk); 2278 sctp_m_freem(m_asconf); 2279 return (NULL); 2280 } 2281 2282 m_asconf_chk->m_len = sizeof(struct sctp_asconf_chunk); 2283 m_asconf->m_len = 0; 2284 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2285 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2286 /* save pointers to lookup address and asconf params */ 2287 lookup_ptr = (vaddr_t)(acp + 1); /* after the header */ 2288 ptr = mtod(m_asconf, vaddr_t); /* beginning of cluster */ 2289 2290 /* fill in chunk header info */ 2291 acp->ch.chunk_type = SCTP_ASCONF; 2292 acp->ch.chunk_flags = 0; 2293 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2294 2295 /* add parameters... up to smallest MTU allowed */ 2296 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2297 /* get the parameter length */ 2298 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2299 /* will it fit in current chunk? */ 2300 if (m_asconf->m_len + p_length > stcb->asoc.smallest_mtu) { 2301 /* won't fit, so we're done with this chunk */ 2302 break; 2303 } 2304 /* assign (and store) a correlation id */ 2305 aa->ap.aph.correlation_id = correlation_id++; 2306 2307 /* 2308 * fill in address if we're doing a delete 2309 * this is a simple way for us to fill in the correlation 2310 * address, which should only be used by the peer if we're 2311 * deleting our source address and adding a new address 2312 * (e.g. renumbering case) 2313 */ 2314 if (lookup_used == 0 && 2315 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2316 struct sctp_ipv6addr_param *lookup; 2317 uint16_t p_size, addr_size; 2318 2319 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2320 lookup->ph.param_type = 2321 htons(aa->ap.addrp.ph.param_type); 2322 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2323 /* copy IPv6 address */ 2324 p_size = sizeof(struct sctp_ipv6addr_param); 2325 addr_size = sizeof(struct in6_addr); 2326 } else { 2327 /* copy IPv4 address */ 2328 p_size = sizeof(struct sctp_ipv4addr_param); 2329 addr_size = sizeof(struct in_addr); 2330 } 2331 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2332 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2333 m_asconf_chk->m_len += SCTP_SIZE32(p_size); 2334 lookup_used = 1; 2335 } 2336 2337 /* copy into current space */ 2338 memcpy((void *)ptr, &aa->ap, p_length); 2339 2340 /* network elements and update lengths */ 2341 aph = (struct sctp_asconf_paramhdr *) ptr; 2342 aap = (struct sctp_asconf_addr_param *) ptr; 2343 /* correlation_id is transparent to peer, no htonl needed */ 2344 aph->ph.param_type = htons(aph->ph.param_type); 2345 aph->ph.param_length = htons(aph->ph.param_length); 2346 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2347 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2348 2349 m_asconf->m_len += SCTP_SIZE32(p_length); 2350 ptr += SCTP_SIZE32(p_length); 2351 2352 /* 2353 * these params are removed off the pending list upon 2354 * getting an ASCONF-ACK back from the peer, just set flag 2355 */ 2356 aa->sent = 1; 2357 } 2358 /* check to see if the lookup addr has been populated yet */ 2359 if (lookup_used == 0) { 2360 /* NOTE: if the address param is optional, can skip this... */ 2361 /* add any valid (existing) address... */ 2362 struct sctp_ipv6addr_param *lookup; 2363 uint16_t p_size, addr_size; 2364 struct sockaddr *found_addr; 2365 vaddr_t addr_ptr; 2366 2367 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2368 found_addr = sctp_find_valid_localaddr(stcb); 2369 else 2370 found_addr = sctp_find_valid_localaddr_ep(stcb); 2371 2372 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2373 if (found_addr != NULL) { 2374 if (found_addr->sa_family == AF_INET6) { 2375 /* copy IPv6 address */ 2376 lookup->ph.param_type = 2377 htons(SCTP_IPV6_ADDRESS); 2378 p_size = sizeof(struct sctp_ipv6addr_param); 2379 addr_size = sizeof(struct in6_addr); 2380 addr_ptr = (vaddr_t)&((struct sockaddr_in6 *) 2381 found_addr)->sin6_addr; 2382 } else { 2383 /* copy IPv4 address */ 2384 lookup->ph.param_type = 2385 htons(SCTP_IPV4_ADDRESS); 2386 p_size = sizeof(struct sctp_ipv4addr_param); 2387 addr_size = sizeof(struct in_addr); 2388 addr_ptr = (vaddr_t)&((struct sockaddr_in *) 2389 found_addr)->sin_addr; 2390 } 2391 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2392 memcpy(lookup->addr, (void *)addr_ptr, addr_size); 2393 m_asconf_chk->m_len += SCTP_SIZE32(p_size); 2394 lookup_used = 1; 2395 } else { 2396 /* uh oh... don't have any address?? */ 2397 #ifdef SCTP_DEBUG 2398 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2399 printf("compose_asconf: no lookup addr!\n"); 2400 #endif /* SCTP_DEBUG */ 2401 /* for now, we send a IPv4 address of 0.0.0.0 */ 2402 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2403 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2404 memset(lookup->addr, 0, sizeof(struct in_addr)); 2405 m_asconf_chk->m_len += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2406 lookup_used = 1; 2407 } 2408 } 2409 2410 /* chain it all together */ 2411 m_asconf_chk->m_next = m_asconf; 2412 m_asconf_chk->m_pkthdr.len = m_asconf_chk->m_len + m_asconf->m_len; 2413 acp->ch.chunk_length = ntohs(m_asconf_chk->m_pkthdr.len); 2414 2415 /* update "sent" flag */ 2416 stcb->asoc.asconf_sent++; 2417 2418 return (m_asconf_chk); 2419 } 2420 2421 /* 2422 * section to handle address changes before an association is up 2423 * eg. changes during INIT/INIT-ACK/COOKIE-ECHO handshake 2424 */ 2425 2426 /* 2427 * processes the (local) addresses in the INIT-ACK chunk 2428 */ 2429 static void 2430 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2431 unsigned int offset, unsigned int length) 2432 { 2433 struct sctp_paramhdr tmp_param, *ph; 2434 uint16_t plen, ptype; 2435 struct sctp_ipv6addr_param addr_store; 2436 struct sockaddr_in6 sin6; 2437 struct sockaddr_in sin; 2438 struct sockaddr *sa; 2439 struct ifaddr *ifa; 2440 2441 #ifdef SCTP_DEBUG 2442 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2443 printf("processing init-ack addresses\n"); 2444 } 2445 #endif /* SCTP_DEBUG */ 2446 2447 /* convert to upper bound */ 2448 length += offset; 2449 2450 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2451 #ifdef SCTP_DEBUG 2452 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2453 printf("process_initack_addrs: invalid offset?\n"); 2454 } 2455 #endif /* SCTP_DEBUG */ 2456 return; 2457 } 2458 2459 /* init the addresses */ 2460 memset(&sin6, 0, sizeof(sin6)); 2461 sin6.sin6_family = AF_INET6; 2462 sin6.sin6_len = sizeof(sin6); 2463 sin6.sin6_port = stcb->rport; 2464 2465 memset(&sin, 0, sizeof(sin)); 2466 sin.sin_len = sizeof(sin); 2467 sin.sin_family = AF_INET; 2468 sin.sin_port = stcb->rport; 2469 2470 /* go through the addresses in the init-ack */ 2471 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2472 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2473 while (ph != NULL) { 2474 ptype = ntohs(ph->param_type); 2475 plen = ntohs(ph->param_length); 2476 if (ptype == SCTP_IPV6_ADDRESS) { 2477 struct sctp_ipv6addr_param *a6p; 2478 /* get the entire IPv6 address param */ 2479 #ifdef SCTP_DEBUG 2480 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2481 printf("process_initack_addrs: checking IPv6 param\n"); 2482 } 2483 #endif /* SCTP_DEBUG */ 2484 a6p = (struct sctp_ipv6addr_param *) 2485 sctp_m_getptr(m, offset, 2486 sizeof(struct sctp_ipv6addr_param), 2487 (uint8_t *)&addr_store); 2488 if (plen != sizeof(struct sctp_ipv6addr_param) || 2489 a6p == NULL) { 2490 #ifdef SCTP_DEBUG 2491 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2492 printf("process_initack_addrs: invalid IPv6 param length\n"); 2493 } 2494 #endif /* SCTP_DEBUG */ 2495 return; 2496 } 2497 memcpy(&sin6.sin6_addr, a6p->addr, 2498 sizeof(struct in6_addr)); 2499 sa = (struct sockaddr *)&sin6; 2500 } else if (ptype == SCTP_IPV4_ADDRESS) { 2501 struct sctp_ipv4addr_param *a4p; 2502 /* get the entire IPv4 address param */ 2503 #ifdef SCTP_DEBUG 2504 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2505 printf("process_initack_addrs: checking IPv4 param\n"); 2506 } 2507 #endif /* SCTP_DEBUG */ 2508 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_ipv4addr_param), (uint8_t *)&addr_store); 2509 if (plen != sizeof(struct sctp_ipv4addr_param) || 2510 a4p == NULL) { 2511 #ifdef SCTP_DEBUG 2512 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2513 printf("process_initack_addrs: invalid IPv4 param length\n"); 2514 } 2515 #endif /* SCTP_DEBUG */ 2516 return; 2517 } 2518 sin.sin_addr.s_addr = a4p->addr; 2519 sa = (struct sockaddr *)&sin; 2520 } else { 2521 #ifdef SCTP_DEBUG 2522 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2523 printf("process_initack_addrs: skipping param type=%xh\n", ptype); 2524 } 2525 #endif /* SCTP_DEBUG */ 2526 goto next_addr; 2527 } 2528 2529 /* see if this address really (still) exists */ 2530 ifa = sctp_find_ifa_by_addr(sa); 2531 if (ifa == NULL) { 2532 /* address doesn't exist anymore */ 2533 int status; 2534 /* are ASCONFs allowed ? */ 2535 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) && 2536 stcb->asoc.peer_supports_asconf) { 2537 /* queue an ASCONF DEL_IP_ADDRESS */ 2538 status = sctp_asconf_queue_add_sa(stcb, sa, 2539 SCTP_DEL_IP_ADDRESS); 2540 /* 2541 * if queued ok, and in correct state, 2542 * set the ASCONF timer 2543 */ 2544 if (status == 0 && 2545 SCTP_GET_STATE(&stcb->asoc) == 2546 SCTP_STATE_OPEN) { 2547 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2548 stcb->sctp_ep, stcb, 2549 stcb->asoc.primary_destination); 2550 } 2551 } 2552 } else { 2553 /* address still exists */ 2554 /* 2555 * if subset bound, ep addr's managed by default 2556 * if not doing ASCONF, add the address to the assoc 2557 */ 2558 if ((stcb->sctp_ep->sctp_flags & 2559 SCTP_PCB_FLAGS_BOUNDALL) == 0 && 2560 (stcb->sctp_ep->sctp_flags & 2561 SCTP_PCB_FLAGS_DO_ASCONF) == 0) { 2562 #ifdef SCTP_DEBUG 2563 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2564 printf("process_initack_addrs: adding local addr to asoc\n"); 2565 } 2566 #endif /* SCTP_DEBUG */ 2567 sctp_add_local_addr_assoc(stcb, ifa); 2568 } 2569 } 2570 2571 next_addr: 2572 /* get next parameter */ 2573 offset += SCTP_SIZE32(plen); 2574 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2575 return; 2576 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2577 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2578 } /* while */ 2579 } 2580 2581 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2582 /* 2583 * checks to see if a specific address is in the initack address list 2584 * returns 1 if found, 0 if not 2585 */ 2586 static uint32_t 2587 sctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, unsigned int offset, 2588 unsigned int length, struct sockaddr *sa) 2589 { 2590 struct sctp_paramhdr tmp_param, *ph; 2591 uint16_t plen, ptype; 2592 struct sctp_ipv6addr_param addr_store; 2593 struct sockaddr_in *sin; 2594 struct sctp_ipv4addr_param *a4p; 2595 #ifdef INET6 2596 struct sockaddr_in6 *sin6, sin6_tmp; 2597 struct sctp_ipv6addr_param *a6p; 2598 #endif /* INET6 */ 2599 2600 if ( 2601 #ifdef INET6 2602 (sa->sa_family != AF_INET6) && 2603 #endif /* INET6 */ 2604 (sa->sa_family != AF_INET)) 2605 return (0); 2606 2607 #ifdef SCTP_DEBUG 2608 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2609 printf("find_initack_addr: starting search for "); 2610 sctp_print_address(sa); 2611 } 2612 #endif /* SCTP_DEBUG */ 2613 /* convert to upper bound */ 2614 length += offset; 2615 2616 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2617 #ifdef SCTP_DEBUG 2618 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2619 printf("find_initack_addr: invalid offset?\n"); 2620 } 2621 #endif /* SCTP_DEBUG */ 2622 return (0); 2623 } 2624 2625 /* go through the addresses in the init-ack */ 2626 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2627 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2628 while (ph != NULL) { 2629 ptype = ntohs(ph->param_type); 2630 plen = ntohs(ph->param_length); 2631 #ifdef INET6 2632 if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) { 2633 /* get the entire IPv6 address param */ 2634 #ifdef SCTP_DEBUG 2635 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2636 printf("addr_in_initack: checking IPv6 param\n"); 2637 } 2638 #endif /* SCTP_DEBUG */ 2639 a6p = (struct sctp_ipv6addr_param *) 2640 sctp_m_getptr(m, offset, 2641 sizeof(struct sctp_ipv6addr_param), 2642 (uint8_t *)&addr_store); 2643 if (plen != sizeof(struct sctp_ipv6addr_param) || 2644 ph == NULL) { 2645 #ifdef SCTP_DEBUG 2646 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2647 printf("addr_in_initack: invalid IPv6 param length\n"); 2648 } 2649 #endif /* SCTP_DEBUG */ 2650 return (0); 2651 } 2652 sin6 = (struct sockaddr_in6 *)sa; 2653 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2654 /* create a copy and clear scope */ 2655 memcpy(&sin6_tmp, sin6, 2656 sizeof(struct sockaddr_in6)); 2657 sin6 = &sin6_tmp; 2658 in6_clearscope(&sin6->sin6_addr); 2659 } 2660 if (memcmp(&sin6->sin6_addr, a6p->addr, 2661 sizeof(struct in6_addr)) == 0) { 2662 /* found it */ 2663 #ifdef SCTP_DEBUG 2664 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2665 printf("addr_in_initack: found IPv6 addr\n"); 2666 } 2667 #endif /* SCTP_DEBUG */ 2668 return (1); 2669 } 2670 } else 2671 #endif /* INET6 */ 2672 2673 if (ptype == SCTP_IPV4_ADDRESS && 2674 sa->sa_family == AF_INET) { 2675 /* get the entire IPv4 address param */ 2676 #ifdef SCTP_DEBUG 2677 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2678 printf("addr_in_initack: checking IPv4 param\n"); 2679 } 2680 #endif /* SCTP_DEBUG */ 2681 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, 2682 offset, sizeof(struct sctp_ipv4addr_param), 2683 (uint8_t *)&addr_store); 2684 if (plen != sizeof(struct sctp_ipv4addr_param) || 2685 ph == NULL) { 2686 #ifdef SCTP_DEBUG 2687 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2688 printf("addr_in_initack: invalid IPv4 param length\n"); 2689 } 2690 #endif /* SCTP_DEBUG */ 2691 return (0); 2692 } 2693 sin = (struct sockaddr_in *)sa; 2694 if (sin->sin_addr.s_addr == a4p->addr) { 2695 /* found it */ 2696 #ifdef SCTP_DEBUG 2697 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2698 printf("addr_in_initack: found IPv4 addr\n"); 2699 } 2700 #endif /* SCTP_DEBUG */ 2701 return (1); 2702 } 2703 } else { 2704 #ifdef SCTP_DEBUG 2705 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2706 printf("addr_in_initack: skipping param type=%xh\n", ptype); 2707 } 2708 #endif /* SCTP_DEBUG */ 2709 } 2710 /* get next parameter */ 2711 offset += SCTP_SIZE32(plen); 2712 if (offset + sizeof(struct sctp_paramhdr) > length) 2713 return (0); 2714 ph = (struct sctp_paramhdr *) 2715 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2716 (uint8_t *)&tmp_param); 2717 } /* while */ 2718 /* not found! */ 2719 #ifdef SCTP_DEBUG 2720 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2721 printf("addr_in_initack: not found!\n"); 2722 } 2723 #endif /* SCTP_DEBUG */ 2724 return (0); 2725 } 2726 2727 /* 2728 * makes sure that the current endpoint local addr list is consistent 2729 * with the new association (eg. subset bound, asconf allowed) 2730 * adds addresses as necessary 2731 */ 2732 static void 2733 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2734 int length, struct sockaddr *init_addr) 2735 { 2736 struct sctp_laddr *laddr; 2737 2738 /* go through the endpoint list */ 2739 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2740 /* be paranoid and validate the laddr */ 2741 if (laddr->ifa == NULL) { 2742 #ifdef SCTP_DEBUG 2743 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2744 printf("check_addr_list_ep: laddr->ifa is NULL"); 2745 } 2746 #endif 2747 continue; 2748 } 2749 if (laddr->ifa->ifa_addr == NULL) { 2750 #ifdef SCTP_DEBUG 2751 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2752 printf("check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 2753 } 2754 #endif 2755 continue; 2756 } 2757 /* do i have it implicitly? */ 2758 if (sctp_cmpaddr(laddr->ifa->ifa_addr, init_addr)) { 2759 #ifdef SCTP_DEBUG 2760 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2761 printf("check_address_list_all: skipping "); 2762 sctp_print_address(laddr->ifa->ifa_addr); 2763 } 2764 #endif /* SCTP_DEBUG */ 2765 continue; 2766 } 2767 /* check to see if in the init-ack */ 2768 if (!sctp_addr_in_initack(stcb, m, offset, length, 2769 laddr->ifa->ifa_addr)) { 2770 /* try to add it */ 2771 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 2772 SCTP_ADD_IP_ADDRESS); 2773 } 2774 } 2775 } 2776 2777 /* 2778 * makes sure that the current kernel address list is consistent 2779 * with the new association (with all addrs bound) 2780 * adds addresses as necessary 2781 */ 2782 static void 2783 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2784 int length, struct sockaddr *init_addr, uint16_t local_scope, 2785 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope) 2786 { 2787 struct ifnet *ifn; 2788 struct ifaddr *ifa; 2789 int s; 2790 2791 /* go through all our known interfaces */ 2792 s = pserialize_read_enter(); 2793 IFNET_READER_FOREACH(ifn) { 2794 if (loopback_scope == 0 && ifn->if_type == IFT_LOOP) { 2795 /* skip loopback interface */ 2796 continue; 2797 } 2798 2799 /* go through each interface address */ 2800 IFADDR_READER_FOREACH(ifa, ifn) { 2801 /* do i have it implicitly? */ 2802 if (sctp_cmpaddr(ifa->ifa_addr, init_addr)) { 2803 #ifdef SCTP_DEBUG 2804 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2805 printf("check_address_list_all: skipping "); 2806 sctp_print_address(ifa->ifa_addr); 2807 } 2808 #endif /* SCTP_DEBUG */ 2809 continue; 2810 } 2811 /* check to see if in the init-ack */ 2812 if (!sctp_addr_in_initack(stcb, m, offset, length, 2813 ifa->ifa_addr)) { 2814 /* try to add it */ 2815 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 2816 ifa, SCTP_ADD_IP_ADDRESS); 2817 } 2818 } /* end foreach ifa */ 2819 } /* end foreach ifn */ 2820 pserialize_read_exit(s); 2821 } 2822 2823 /* 2824 * validates an init-ack chunk (from a cookie-echo) with current addresses 2825 * adds addresses from the init-ack into our local address list, if needed 2826 * queues asconf adds/deletes addresses as needed and makes appropriate 2827 * list changes for source address selection 2828 * m, offset: points to the start of the address list in an init-ack chunk 2829 * length: total length of the address params only 2830 * init_addr: address where my INIT-ACK was sent from 2831 */ 2832 void 2833 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2834 int length, struct sockaddr *init_addr, uint16_t local_scope, 2835 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope) 2836 { 2837 2838 /* process the local addresses in the initack */ 2839 sctp_process_initack_addresses(stcb, m, offset, length); 2840 2841 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2842 /* bound all case */ 2843 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 2844 local_scope, site_scope, ipv4_scope, loopback_scope); 2845 } else { 2846 /* subset bound case */ 2847 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) { 2848 /* asconf's allowed */ 2849 sctp_check_address_list_ep(stcb, m, offset, length, 2850 init_addr); 2851 } 2852 /* else, no asconfs allowed, so what we sent is what we get */ 2853 } 2854 } 2855 2856 /* 2857 * sctp_bindx() support 2858 */ 2859 uint32_t 2860 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, uint16_t type) 2861 { 2862 struct ifaddr *ifa; 2863 2864 if (sa->sa_len == 0) 2865 return (EINVAL); 2866 2867 ifa = sctp_find_ifa_by_addr(sa); 2868 if (ifa != NULL) { 2869 #ifdef INET6 2870 if (ifa->ifa_addr->sa_family == AF_INET6) { 2871 struct in6_ifaddr *ifa6; 2872 ifa6 = (struct in6_ifaddr *)ifa; 2873 if (IFA6_IS_DEPRECATED(ifa6) || 2874 (ifa6->ia6_flags & (IN6_IFF_DETACHED | 2875 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) { 2876 /* Can't bind a non-existent addr. */ 2877 return (EINVAL); 2878 } 2879 } 2880 #endif /* INET6 */ 2881 /* add this address */ 2882 sctp_addr_mgmt_ep(inp, ifa, type); 2883 } else { 2884 /* invalid address! */ 2885 #ifdef SCTP_DEBUG 2886 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2887 printf("addr_mgmt_ep_sa: got invalid address!\n"); 2888 } 2889 #endif /* SCTP_DEBUG */ 2890 return (EADDRNOTAVAIL); 2891 } 2892 return (0); 2893 } 2894
Indexes created Mon Sep 22 21:09:42 GMT 2025