sctp_asconf.c revision 1.9
1 /* $NetBSD: sctp_asconf.c,v 1.9 2017/01/16 15:44:47 christos 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 1.9 2017/01/16 15:44:47 christos 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/scope6_var.h> 67 #include <netinet6/nd6.h> 68 #endif /* INET6 */ 69 70 #include <netinet/in_pcb.h> 71 72 #include <netinet/sctp_var.h> 73 #include <netinet/sctp_pcb.h> 74 #include <netinet/sctp_header.h> 75 #include <netinet/sctputil.h> 76 #include <netinet/sctp_output.h> 77 #include <netinet/sctp_asconf.h> 78 79 /* 80 * debug flags: 81 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 82 * SCTP_DEBUG_ASCONF2: detailed info 83 */ 84 #ifdef SCTP_DEBUG 85 extern u_int32_t sctp_debug_on; 86 #endif /* SCTP_DEBUG */ 87 88 /* 89 * draft-ietf-tsvwg-addip-sctp 90 * 91 * Address management only currently supported 92 * For the bound all case: 93 * the asoc local addr list is always a "DO NOT USE" list 94 * For the subset bound case: 95 * If ASCONFs are allowed: 96 * the endpoint local addr list is the usable address list 97 * the asoc local addr list is the "DO NOT USE" list 98 * If ASCONFs are not allowed: 99 * the endpoint local addr list is the default usable list 100 * the asoc local addr list is the usable address list 101 * 102 * An ASCONF parameter queue exists per asoc which holds the pending 103 * address operations. Lists are updated upon receipt of ASCONF-ACK. 104 * 105 * Deleted addresses are always immediately removed from the lists as 106 * they will (shortly) no longer exist in the kernel. We send ASCONFs 107 * as a courtesy, only if allowed. 108 */ 109 110 /* 111 * ASCONF parameter processing 112 * response_required: set if a reply is required (eg. SUCCESS_REPORT) 113 * returns a mbuf to an "error" response parameter or NULL/"success" if ok 114 * FIX: allocating this many mbufs on the fly is pretty inefficient... 115 */ 116 117 static struct mbuf * 118 sctp_asconf_success_response(uint32_t id) 119 { 120 struct mbuf *m_reply = NULL; 121 struct sctp_asconf_paramhdr *aph; 122 123 MGET(m_reply, M_DONTWAIT, MT_DATA); 124 if (m_reply == NULL) { 125 #ifdef SCTP_DEBUG 126 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 127 printf("asconf_success_response: couldn't get mbuf!\n"); 128 } 129 #endif /* SCTP_DEBUG */ 130 return NULL; 131 } 132 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 133 aph->correlation_id = id; 134 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 135 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 136 m_reply->m_len = aph->ph.param_length; 137 aph->ph.param_length = htons(aph->ph.param_length); 138 139 return m_reply; 140 } 141 142 static struct mbuf * 143 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv, 144 uint16_t tlv_length) 145 { 146 struct mbuf *m_reply = NULL; 147 struct sctp_asconf_paramhdr *aph; 148 struct sctp_error_cause *error; 149 uint8_t *tlv; 150 151 MGET(m_reply, M_DONTWAIT, MT_DATA); 152 if (m_reply == NULL) { 153 #ifdef SCTP_DEBUG 154 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 155 printf("asconf_error_response: couldn't get mbuf!\n"); 156 } 157 #endif /* SCTP_DEBUG */ 158 return NULL; 159 } 160 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 161 error = (struct sctp_error_cause *)(aph + 1); 162 163 aph->correlation_id = id; 164 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 165 error->code = htons(cause); 166 error->length = tlv_length + sizeof(struct sctp_error_cause); 167 aph->ph.param_length = error->length + 168 sizeof(struct sctp_asconf_paramhdr); 169 170 if (aph->ph.param_length > MLEN) { 171 #ifdef SCTP_DEBUG 172 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 173 printf("asconf_error_response: tlv_length (%xh) too big\n", 174 tlv_length); 175 } 176 #endif /* SCTP_DEBUG */ 177 sctp_m_freem(m_reply); /* discard */ 178 return NULL; 179 } 180 181 if (error_tlv != NULL) { 182 tlv = (uint8_t *)(error + 1); 183 memcpy(tlv, error_tlv, tlv_length); 184 } 185 186 m_reply->m_len = aph->ph.param_length; 187 error->length = htons(error->length); 188 aph->ph.param_length = htons(aph->ph.param_length); 189 190 return m_reply; 191 } 192 193 static struct mbuf * 194 sctp_process_asconf_add_ip(struct sctp_asconf_paramhdr *aph, 195 struct sctp_tcb *stcb, int response_required) 196 { 197 struct mbuf *m_reply = NULL; 198 struct sockaddr_storage sa_store; 199 struct sctp_ipv4addr_param *v4addr; 200 uint16_t param_type, param_length, aparam_length; 201 struct sockaddr *sa; 202 struct sockaddr_in *sin; 203 #ifdef INET6 204 struct sockaddr_in6 *sin6; 205 struct sctp_ipv6addr_param *v6addr; 206 #endif /* INET6 */ 207 208 aparam_length = ntohs(aph->ph.param_length); 209 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 210 #ifdef INET6 211 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 212 #endif /* INET6 */ 213 param_type = ntohs(v4addr->ph.param_type); 214 param_length = ntohs(v4addr->ph.param_length); 215 216 sa = (struct sockaddr *)&sa_store; 217 switch (param_type) { 218 case SCTP_IPV4_ADDRESS: 219 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 220 /* invalid param size */ 221 return NULL; 222 } 223 sin = (struct sockaddr_in *)&sa_store; 224 memset(sin, 0, sizeof(*sin)); 225 sin->sin_family = AF_INET; 226 sin->sin_len = sizeof(struct sockaddr_in); 227 sin->sin_port = stcb->rport; 228 sin->sin_addr.s_addr = v4addr->addr; 229 #ifdef SCTP_DEBUG 230 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 231 printf("process_asconf_add_ip: adding "); 232 sctp_print_address(sa); 233 } 234 #endif /* SCTP_DEBUG */ 235 break; 236 case SCTP_IPV6_ADDRESS: 237 #ifdef INET6 238 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 239 /* invalid param size */ 240 return NULL; 241 } 242 sin6 = (struct sockaddr_in6 *)&sa_store; 243 memset(sin6, 0, sizeof(*sin6)); 244 sin6->sin6_family = AF_INET6; 245 sin6->sin6_len = sizeof(struct sockaddr_in6); 246 sin6->sin6_port = stcb->rport; 247 memcpy((void *)&sin6->sin6_addr, v6addr->addr, 248 sizeof(struct in6_addr)); 249 #ifdef SCTP_DEBUG 250 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 251 printf("process_asconf_add_ip: adding "); 252 sctp_print_address(sa); 253 } 254 #endif /* SCTP_DEBUG */ 255 #else 256 /* IPv6 not enabled! */ 257 /* FIX ME: currently sends back an invalid param error */ 258 m_reply = sctp_asconf_error_response(aph->correlation_id, 259 SCTP_ERROR_INVALID_PARAM, (uint8_t *)aph, aparam_length); 260 #ifdef SCTP_DEBUG 261 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 262 printf("process_asconf_add_ip: v6 disabled- skipping "); 263 sctp_print_address(sa); 264 } 265 #endif /* SCTP_DEBUG */ 266 return m_reply; 267 #endif /* INET6 */ 268 break; 269 default: 270 m_reply = sctp_asconf_error_response(aph->correlation_id, 271 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 272 aparam_length); 273 return m_reply; 274 } /* end switch */ 275 276 /* add the address */ 277 if (sctp_add_remote_addr(stcb, sa, 0, 6) != 0) { 278 #ifdef SCTP_DEBUG 279 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 280 printf("process_asconf_add_ip: error adding address\n"); 281 } 282 #endif /* SCTP_DEBUG */ 283 m_reply = sctp_asconf_error_response(aph->correlation_id, 284 SCTP_ERROR_RESOURCE_SHORTAGE, (uint8_t *)aph, 285 aparam_length); 286 } else { 287 /* notify upper layer */ 288 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa); 289 if (response_required) { 290 m_reply = 291 sctp_asconf_success_response(aph->correlation_id); 292 } 293 } 294 295 return m_reply; 296 } 297 298 static struct mbuf * 299 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph, 300 struct sctp_tcb *stcb, int response_required) 301 { 302 struct mbuf *m_reply = NULL; 303 struct sockaddr_storage sa_store, sa_source; 304 struct sctp_ipv4addr_param *v4addr; 305 uint16_t param_type, param_length, aparam_length; 306 struct sockaddr *sa; 307 struct sockaddr_in *sin; 308 struct ip *iph; 309 int result; 310 #ifdef INET6 311 struct sockaddr_in6 *sin6; 312 struct sctp_ipv6addr_param *v6addr; 313 #endif /* INET6 */ 314 315 aparam_length = ntohs(aph->ph.param_length); 316 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 317 #ifdef INET6 318 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 319 #endif /* INET6 */ 320 param_type = ntohs(v4addr->ph.param_type); 321 param_length = ntohs(v4addr->ph.param_length); 322 323 /* get the source IP address for deletion check */ 324 iph = mtod(m, struct ip *); 325 if (iph->ip_v == IPVERSION) { 326 /* IPv4 source */ 327 sin = (struct sockaddr_in *)&sa_source; 328 memset(sin, 0, sizeof(*sin)); 329 sin->sin_family = AF_INET; 330 sin->sin_len = sizeof(struct sockaddr_in); 331 sin->sin_port = stcb->rport; 332 sin->sin_addr.s_addr = iph->ip_src.s_addr; 333 } 334 #ifdef INET6 335 else if (iph->ip_v == (IPV6_VERSION >> 4)) { 336 /* IPv6 source */ 337 struct ip6_hdr *ip6; 338 339 sin6 = (struct sockaddr_in6 *)&sa_source; 340 memset(sin6, 0, sizeof(*sin6)); 341 sin6->sin6_family = AF_INET6; 342 sin6->sin6_len = sizeof(struct sockaddr_in6); 343 sin6->sin6_port = stcb->rport; 344 ip6 = mtod(m, struct ip6_hdr *); 345 sin6->sin6_addr = ip6->ip6_src; 346 } 347 #endif /* INET6 */ 348 else 349 return NULL; 350 351 sa = (struct sockaddr *)&sa_store; 352 switch (param_type) { 353 case SCTP_IPV4_ADDRESS: 354 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 355 /* invalid param size */ 356 return NULL; 357 } 358 sin = (struct sockaddr_in *)&sa_store; 359 memset(sin, 0, sizeof(*sin)); 360 sin->sin_family = AF_INET; 361 sin->sin_len = sizeof(struct sockaddr_in); 362 sin->sin_port = stcb->rport; 363 sin->sin_addr.s_addr = v4addr->addr; 364 #ifdef SCTP_DEBUG 365 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 366 printf("process_asconf_delete_ip: deleting "); 367 sctp_print_address(sa); 368 } 369 #endif /* SCTP_DEBUG */ 370 break; 371 case SCTP_IPV6_ADDRESS: 372 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 373 /* invalid param size */ 374 return NULL; 375 } 376 #ifdef INET6 377 sin6 = (struct sockaddr_in6 *)&sa_store; 378 memset(sin6, 0, sizeof(*sin6)); 379 sin6->sin6_family = AF_INET6; 380 sin6->sin6_len = sizeof(struct sockaddr_in6); 381 sin6->sin6_port = stcb->rport; 382 memcpy(&sin6->sin6_addr, v6addr->addr, 383 sizeof(struct in6_addr)); 384 #ifdef SCTP_DEBUG 385 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 386 printf("process_asconf_delete_ip: deleting "); 387 sctp_print_address(sa); 388 } 389 #endif /* SCTP_DEBUG */ 390 #else 391 /* IPv6 not enabled! No "action" needed; just ack it */ 392 #ifdef SCTP_DEBUG 393 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 394 printf("process_asconf_delete_ip: v6 disabled- ignoring: "); 395 sctp_print_address(sa); 396 } 397 #endif /* SCTP_DEBUG */ 398 /* just respond with a "success" ASCONF-ACK */ 399 return NULL; 400 #endif /* INET6 */ 401 break; 402 default: 403 m_reply = sctp_asconf_error_response(aph->correlation_id, 404 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 405 aparam_length); 406 return m_reply; 407 } /* end switch */ 408 409 /* make sure the source address is not being deleted */ 410 if ((memcmp(sa, &sa_source, sizeof(struct sockaddr_in)) == 0) 411 #ifdef INET6 412 || (memcmp(sa, &sa_source, sizeof(struct sockaddr_in6)) == 0) 413 #endif /* INET6 */ 414 ) { 415 /* trying to delete the source address! */ 416 #ifdef SCTP_DEBUG 417 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 418 printf("process_asconf_delete_ip: tried to delete source addr\n"); 419 } 420 #endif /* SCTP_DEBUG */ 421 m_reply = sctp_asconf_error_response(aph->correlation_id, 422 SCTP_ERROR_DELETE_SOURCE_ADDR, (uint8_t *)aph, 423 aparam_length); 424 return m_reply; 425 } 426 427 /* delete the address */ 428 result = sctp_del_remote_addr(stcb, sa); 429 /* 430 * note if result == -2, the address doesn't exist in the asoc 431 * but since it's being deleted anyways, we just ack the delete 432 * -- but this probably means something has already gone awry 433 */ 434 if (result == -1) { 435 /* only one address in the asoc */ 436 #ifdef SCTP_DEBUG 437 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 438 printf("process_asconf_delete_ip: tried to delete last IP addr!\n"); 439 } 440 #endif /* SCTP_DEBUG */ 441 m_reply = sctp_asconf_error_response(aph->correlation_id, 442 SCTP_ERROR_DELETE_LAST_ADDR, (uint8_t *)aph, 443 aparam_length); 444 } else { 445 /* notify upper layer */ 446 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa); 447 } 448 449 if (response_required) { 450 m_reply = sctp_asconf_success_response(aph->correlation_id); 451 } 452 return m_reply; 453 } 454 455 static struct mbuf * 456 sctp_process_asconf_set_primary(struct sctp_asconf_paramhdr *aph, 457 struct sctp_tcb *stcb, int response_required) 458 { 459 struct mbuf *m_reply = NULL; 460 struct sockaddr_storage sa_store; 461 struct sctp_ipv4addr_param *v4addr; 462 uint16_t param_type, param_length, aparam_length; 463 struct sockaddr *sa; 464 struct sockaddr_in *sin; 465 #ifdef INET6 466 struct sockaddr_in6 *sin6; 467 struct sctp_ipv6addr_param *v6addr; 468 #endif /* INET6 */ 469 470 aparam_length = ntohs(aph->ph.param_length); 471 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 472 #ifdef INET6 473 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 474 #endif /* INET6 */ 475 param_type = ntohs(v4addr->ph.param_type); 476 param_length = ntohs(v4addr->ph.param_length); 477 478 sa = (struct sockaddr *)&sa_store; 479 switch (param_type) { 480 case SCTP_IPV4_ADDRESS: 481 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 482 /* invalid param size */ 483 return NULL; 484 } 485 sin = (struct sockaddr_in *)&sa_store; 486 memset(sin, 0, sizeof(*sin)); 487 sin->sin_family = AF_INET; 488 sin->sin_len = sizeof(struct sockaddr_in); 489 sin->sin_addr.s_addr = v4addr->addr; 490 #ifdef SCTP_DEBUG 491 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 492 printf("process_asconf_set_primary: "); 493 sctp_print_address(sa); 494 } 495 #endif /* SCTP_DEBUG */ 496 break; 497 case SCTP_IPV6_ADDRESS: 498 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 499 /* invalid param size */ 500 return NULL; 501 } 502 #ifdef INET6 503 sin6 = (struct sockaddr_in6 *)&sa_store; 504 memset(sin6, 0, sizeof(*sin6)); 505 sin6->sin6_family = AF_INET6; 506 sin6->sin6_len = sizeof(struct sockaddr_in6); 507 memcpy((void *)&sin6->sin6_addr, v6addr->addr, 508 sizeof(struct in6_addr)); 509 #ifdef SCTP_DEBUG 510 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 511 printf("process_asconf_set_primary: "); 512 sctp_print_address(sa); 513 } 514 #endif /* SCTP_DEBUG */ 515 #else 516 /* IPv6 not enabled! No "action" needed; just ack it */ 517 #ifdef SCTP_DEBUG 518 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 519 printf("process_asconf_set_primary: v6 disabled- ignoring: "); 520 sctp_print_address(sa); 521 } 522 #endif /* SCTP_DEBUG */ 523 /* just respond with a "success" ASCONF-ACK */ 524 return NULL; 525 #endif /* INET6 */ 526 break; 527 default: 528 m_reply = sctp_asconf_error_response(aph->correlation_id, 529 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 530 aparam_length); 531 return m_reply; 532 } /* end switch */ 533 534 /* set the primary address */ 535 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 536 #ifdef SCTP_DEBUG 537 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 538 printf("process_asconf_set_primary: primary address set\n"); 539 } 540 #endif /* SCTP_DEBUG */ 541 /* notify upper layer */ 542 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa); 543 544 if (response_required) { 545 m_reply = sctp_asconf_success_response(aph->correlation_id); 546 } 547 } else { 548 /* couldn't set the requested primary address! */ 549 #ifdef SCTP_DEBUG 550 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 551 printf("process_asconf_set_primary: set primary failed!\n"); 552 } 553 #endif /* SCTP_DEBUG */ 554 /* must have been an invalid address, so report */ 555 m_reply = sctp_asconf_error_response(aph->correlation_id, 556 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 557 aparam_length); 558 } 559 560 return m_reply; 561 } 562 563 /* 564 * handles an ASCONF chunk 565 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 566 */ 567 void 568 sctp_handle_asconf(struct mbuf *m, unsigned int offset, struct sctp_asconf_chunk *cp, 569 struct sctp_tcb *stcb, struct sctp_nets *net) 570 { 571 struct sctp_association *asoc; 572 uint32_t serial_num; 573 struct mbuf *m_ack, *m_result, *m_tail; 574 struct sctp_asconf_ack_chunk *ack_cp; 575 struct sctp_asconf_paramhdr *aph, *ack_aph; 576 struct sctp_ipv6addr_param *p_addr; 577 unsigned int asconf_limit; 578 int error = 0; /* did an error occur? */ 579 /* asconf param buffer */ 580 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER]; 581 582 /* verify minimum length */ 583 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 584 #ifdef SCTP_DEBUG 585 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 586 printf("handle_asconf: chunk too small = %xh\n", 587 ntohs(cp->ch.chunk_length)); 588 } 589 #endif /* SCTP_DEBUG */ 590 return; 591 } 592 593 asoc = &stcb->asoc; 594 serial_num = ntohl(cp->serial_number); 595 596 if (serial_num == asoc->asconf_seq_in) { 597 /* got a duplicate ASCONF */ 598 #ifdef SCTP_DEBUG 599 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 600 printf("handle_asconf: got duplicate serial number = %xh\n", 601 serial_num); 602 } 603 #endif /* SCTP_DEBUG */ 604 /* resend last ASCONF-ACK... */ 605 sctp_send_asconf_ack(stcb, 1); 606 return; 607 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 608 #ifdef SCTP_DEBUG 609 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 610 printf("handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 611 serial_num, asoc->asconf_seq_in+1); 612 } 613 #endif /* SCTP_DEBUG */ 614 return; 615 } 616 617 /* it's the expected "next" sequence number, so process it */ 618 asoc->asconf_seq_in = serial_num; /* update sequence */ 619 /* get length of all the param's in the ASCONF */ 620 asconf_limit = offset + ntohs(cp->ch.chunk_length); 621 #ifdef SCTP_DEBUG 622 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 623 printf("handle_asconf: asconf_limit=%u, sequence=%xh\n", 624 asconf_limit, serial_num); 625 } 626 #endif /* SCTP_DEBUG */ 627 if (asoc->last_asconf_ack_sent != NULL) { 628 /* free last ASCONF-ACK message sent */ 629 sctp_m_freem(asoc->last_asconf_ack_sent); 630 asoc->last_asconf_ack_sent = NULL; 631 } 632 MGETHDR(m_ack, M_DONTWAIT, MT_DATA); 633 if (m_ack == NULL) { 634 #ifdef SCTP_DEBUG 635 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 636 printf("handle_asconf: couldn't get mbuf!\n"); 637 } 638 #endif /* SCTP_DEBUG */ 639 return; 640 } 641 m_tail = m_ack; /* current reply chain's tail */ 642 643 /* fill in ASCONF-ACK header */ 644 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 645 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 646 ack_cp->ch.chunk_flags = 0; 647 ack_cp->serial_number = htonl(serial_num); 648 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 649 m_ack->m_len = sizeof(struct sctp_asconf_ack_chunk); 650 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 651 m_ack->m_pkthdr.len = sizeof(struct sctp_asconf_ack_chunk); 652 653 /* skip the lookup address parameter */ 654 offset += sizeof(struct sctp_asconf_chunk); 655 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); 656 if (p_addr == NULL) { 657 #ifdef SCTP_DEBUG 658 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 659 printf("handle_asconf: couldn't get lookup addr!\n"); 660 } 661 #endif /* SCTP_DEBUG */ 662 663 /* respond with a missing/invalid mandatory parameter error */ 664 return; 665 } 666 /* param_length is already validated in process_control... */ 667 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 668 669 /* get pointer to first asconf param in ASCONF */ 670 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); 671 /* get pointer to first asconf param in ASCONF-ACK */ 672 if (aph == NULL) { 673 printf("Gak in asconf\n"); 674 return; 675 } 676 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, vaddr_t) + sizeof(struct sctp_asconf_ack_chunk)); 677 if (ack_aph == NULL) { 678 printf("Gak in asconf2\n"); 679 return; 680 } 681 682 /* process through all parameters */ 683 while (aph != NULL) { 684 unsigned int param_length, param_type; 685 686 param_type = ntohs(aph->ph.param_type); 687 param_length = ntohs(aph->ph.param_length); 688 if (offset + param_length > asconf_limit) { 689 /* parameter goes beyond end of chunk! */ 690 sctp_m_freem(m_ack); 691 return; 692 } 693 m_result = NULL; 694 695 if (param_length > sizeof(aparam_buf)) { 696 #ifdef SCTP_DEBUG 697 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 698 printf("handle_asconf: param length (%u) larger than buffer size!\n", param_length); 699 } 700 #endif /* SCTP_DEBUG */ 701 sctp_m_freem(m_ack); 702 return; 703 } 704 if (param_length <= sizeof(struct sctp_paramhdr)) { 705 #ifdef SCTP_DEBUG 706 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 707 printf("handle_asconf: param length (%u) too short\n", param_length); 708 } 709 #endif /* SCTP_DEBUG */ 710 sctp_m_freem(m_ack); 711 } 712 713 /* get the entire parameter */ 714 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 715 if (aph == NULL) { 716 printf("Gag\n"); 717 sctp_m_freem(m_ack); 718 return; 719 } 720 switch (param_type) { 721 case SCTP_ADD_IP_ADDRESS: 722 asoc->peer_supports_asconf = 1; 723 m_result = sctp_process_asconf_add_ip(aph, stcb, error); 724 break; 725 case SCTP_DEL_IP_ADDRESS: 726 asoc->peer_supports_asconf = 1; 727 m_result = sctp_process_asconf_delete_ip(m, aph, stcb, 728 error); 729 break; 730 case SCTP_ERROR_CAUSE_IND: 731 /* not valid in an ASCONF chunk */ 732 break; 733 case SCTP_SET_PRIM_ADDR: 734 asoc->peer_supports_asconf_setprim = 1; 735 m_result = sctp_process_asconf_set_primary(aph, stcb, 736 error); 737 break; 738 case SCTP_SUCCESS_REPORT: 739 /* not valid in an ASCONF chunk */ 740 break; 741 case SCTP_ULP_ADAPTION: 742 /* FIX */ 743 break; 744 default: 745 if ((param_type & 0x8000) == 0) { 746 /* Been told to STOP at this param */ 747 asconf_limit = offset; 748 /* FIX FIX - We need to call sctp_arethere_unrecognized_parameters() 749 * to get a operr and send it for any param's with the 750 * 0x4000 bit set OR do it here ourselves... note we still 751 * must STOP if the 0x8000 bit is clear. 752 */ 753 } 754 /* unknown/invalid param type */ 755 break; 756 } /* switch */ 757 758 /* add any (error) result to the reply mbuf chain */ 759 if (m_result != NULL) { 760 #ifdef SCTP_DEBUG 761 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 762 printf("handle_asconf: adding reply...\n"); 763 } 764 #endif /* SCTP_DEBUG */ 765 m_tail->m_next = m_result; 766 m_tail = m_result; 767 /* update lengths, make sure it's aligned too */ 768 m_result->m_len = SCTP_SIZE32(m_result->m_len); 769 m_ack->m_pkthdr.len += m_result->m_len; 770 ack_cp->ch.chunk_length += m_result->m_len; 771 /* set flag to force success reports */ 772 error = 1; 773 } 774 775 offset += SCTP_SIZE32(param_length); 776 /* update remaining ASCONF message length to process */ 777 if (offset >= asconf_limit) { 778 /* no more data in the mbuf chain */ 779 break; 780 } 781 /* get pointer to next asconf param */ 782 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 783 sizeof(struct sctp_asconf_paramhdr), 784 (uint8_t *)&aparam_buf); 785 if (aph == NULL) { 786 /* can't get an asconf paramhdr */ 787 #ifdef SCTP_DEBUG 788 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 789 printf("handle_asconf: can't get asconf param hdr!\n"); 790 } 791 #endif /* SCTP_DEBUG */ 792 /* FIX ME - add error here... */ 793 } 794 } /* while */ 795 796 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 797 /* save the ASCONF-ACK reply */ 798 asoc->last_asconf_ack_sent = m_ack; 799 /* and send (a new one) it out... */ 800 sctp_send_asconf_ack(stcb, 0); 801 } 802 803 /* 804 * does the address match? 805 * returns 0 if not, 1 if so 806 */ 807 static uint32_t 808 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 809 { 810 #ifdef INET6 811 if (sa->sa_family == AF_INET6) { 812 /* IPv6 sa address */ 813 /* XXX scopeid */ 814 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 815 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 816 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 817 sizeof(struct in6_addr)) == 0)) { 818 return (1); 819 } 820 } else 821 #endif /* INET6 */ 822 if (sa->sa_family == AF_INET) { 823 /* IPv4 sa address */ 824 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 825 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 826 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 827 sizeof(struct in_addr)) == 0)) { 828 return (1); 829 } 830 } 831 return (0); 832 } 833 834 /* 835 * Cleanup for non-responded/OP ERR'd ASCONF 836 */ 837 void 838 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 839 { 840 #ifdef SCTP_DEBUG 841 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 842 printf("asconf_cleanup: marking peer ASCONF incapable and cleaning up\n"); 843 } 844 #endif /* SCTP_DEBUG */ 845 /* mark peer as ASCONF incapable */ 846 stcb->asoc.peer_supports_asconf = 0; 847 stcb->asoc.peer_supports_asconf_setprim = 0; 848 /* 849 * clear out any existing asconfs going out 850 */ 851 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net); 852 stcb->asoc.asconf_seq_out++; 853 /* remove the old ASCONF on our outbound queue */ 854 sctp_toss_old_asconf(stcb); 855 } 856 857 /* 858 * process an ADD/DELETE IP ack from peer 859 * ifa: corresponding ifaddr to the address being added/deleted 860 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS 861 * flag: 1=success, 0=failure 862 */ 863 static void 864 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct ifaddr *addr, 865 uint16_t type, uint32_t flag) 866 { 867 868 /* 869 * do the necessary asoc list work- 870 * if we get a failure indication, leave the address on the 871 * "do not use" asoc list 872 * if we get a success indication, remove the address from 873 * the list 874 */ 875 /* 876 * Note: this will only occur for ADD_IP_ADDRESS, since 877 * DEL_IP_ADDRESS is never actually added to the list... 878 */ 879 if (flag) { 880 /* success case, so remove from the list */ 881 sctp_del_local_addr_assoc(stcb, addr); 882 } 883 /* else, leave it on the list */ 884 } 885 886 /* 887 * add an asconf add/delete IP address parameter to the queue 888 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR 889 * returns 0 if completed, non-zero if not completed 890 * NOTE: if adding, but delete already scheduled (and not yet 891 * sent out), simply remove from queue. Same for deleting 892 * an address already scheduled for add. If a duplicate 893 * operation is found, ignore the new one. 894 */ 895 static uint32_t 896 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct ifaddr *ifa, uint16_t type) 897 { 898 struct sctp_asconf_addr *aa, *aa_next; 899 #ifdef SCTP_DEBUG 900 char buf[128]; /* for address in string format */ 901 #endif /* SCTP_DEBUG */ 902 903 /* see if peer supports ASCONF */ 904 if (stcb->asoc.peer_supports_asconf == 0) { 905 #ifdef SCTP_DEBUG 906 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 907 printf("asconf_queue_add: peer doesn't support ASCONF\n"); 908 } 909 #endif /* SCTP_DEBUG */ 910 return (-1); 911 } 912 913 /* make sure the request isn't already in the queue */ 914 for (aa=TAILQ_FIRST(&stcb->asoc.asconf_queue); aa!=NULL; aa=aa_next) { 915 aa_next = TAILQ_NEXT(aa, next); 916 /* address match? */ 917 if (sctp_asconf_addr_match(aa, ifa->ifa_addr) == 0) 918 continue; 919 /* is the request already in queue (sent or not) */ 920 if (aa->ap.aph.ph.param_type == type) { 921 #ifdef SCTP_DEBUG 922 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 923 printf("asconf_queue_add: request already exists\n"); 924 } 925 #endif /* SCTP_DEBUG */ 926 return (-1); 927 } 928 /* is the negative request already in queue, and not sent */ 929 if (aa->sent == 0 && 930 /* add requested, delete already queued */ 931 ((type == SCTP_ADD_IP_ADDRESS && 932 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) || 933 /* delete requested, add already queued */ 934 (type == SCTP_DEL_IP_ADDRESS && 935 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS))) { 936 /* delete the existing entry in the queue */ 937 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 938 /* take the entry off the appropriate list */ 939 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1); 940 /* free the entry */ 941 free(aa, M_PCB); 942 943 #ifdef SCTP_DEBUG 944 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 945 printf("asconf_queue_add: removing 'opposite' queued request\n"); 946 } 947 #endif /* SCTP_DEBUG */ 948 return (-1); 949 } 950 } /* for each aa */ 951 952 /* adding new request to the queue */ 953 aa = malloc(sizeof(*aa), M_PCB, M_NOWAIT); 954 if (aa == NULL) { 955 /* didn't get memory */ 956 #ifdef SCTP_DEBUG 957 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 958 printf("asconf_queue_add: failed to get memory!\n"); 959 } 960 #endif /* SCTP_DEBUG */ 961 return (-1); 962 } 963 /* fill in asconf address parameter fields */ 964 /* top level elements are "networked" during send */ 965 aa->ap.aph.ph.param_type = type; 966 aa->ifa = ifa; 967 /* correlation_id filled in during send routine later... */ 968 if (ifa->ifa_addr->sa_family == AF_INET6) { 969 /* IPv6 address */ 970 #ifdef SCTP_DEBUG 971 char ip6buf[INET6_ADDRSTRLEN]; 972 #endif 973 struct sockaddr_in6 *sin6; 974 975 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 976 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 977 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 978 aa->ap.aph.ph.param_length = 979 sizeof(struct sctp_asconf_paramhdr) + 980 sizeof(struct sctp_ipv6addr_param); 981 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 982 sizeof(struct in6_addr)); 983 #ifdef SCTP_DEBUG 984 strlcpy(buf, IN6_PRINT(ip6buf, &sin6->sin6_addr), sizeof(buf)); 985 #endif /* SCTP_DEBUG */ 986 987 } else if (ifa->ifa_addr->sa_family == AF_INET) { 988 /* IPv4 address */ 989 struct sockaddr_in *sin = (struct sockaddr_in *)ifa->ifa_addr; 990 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 991 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 992 aa->ap.aph.ph.param_length = 993 sizeof(struct sctp_asconf_paramhdr) + 994 sizeof(struct sctp_ipv4addr_param); 995 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 996 sizeof(struct in_addr)); 997 #ifdef SCTP_DEBUG 998 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf)); 999 #endif /* SCTP_DEBUG */ 1000 } else { 1001 /* invalid family! */ 1002 return (-1); 1003 } 1004 aa->sent = 0; /* clear sent flag */ 1005 1006 /* 1007 * if we are deleting an address it should go out last 1008 * otherwise, add it to front of the pending queue 1009 */ 1010 if (type == SCTP_ADD_IP_ADDRESS) { 1011 /* add goes to the front of the queue */ 1012 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next); 1013 #ifdef SCTP_DEBUG 1014 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1015 printf("asconf_queue_add: appended asconf ADD_IP_ADDRESS: %s\n", buf); 1016 } 1017 #endif /* SCTP_DEBUG */ 1018 } else { 1019 /* delete and set primary goes to the back of the queue */ 1020 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1021 #ifdef SCTP_DEBUG 1022 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1023 if (type == SCTP_DEL_IP_ADDRESS) { 1024 printf("asconf_queue_add: inserted asconf DEL_IP_ADDRESS: %s\n", buf); 1025 } else { 1026 printf("asconf_queue_add: inserted asconf SET_PRIM_ADDR: %s\n", buf); 1027 } 1028 } 1029 #endif /* SCTP_DEBUG */ 1030 } 1031 1032 return (0); 1033 } 1034 1035 /* 1036 * add an asconf add/delete IP address parameter to the queue by addr 1037 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR 1038 * returns 0 if completed, non-zero if not completed 1039 * NOTE: if adding, but delete already scheduled (and not yet 1040 * sent out), simply remove from queue. Same for deleting 1041 * an address already scheduled for add. If a duplicate 1042 * operation is found, ignore the new one. 1043 */ 1044 static uint32_t 1045 sctp_asconf_queue_add_sa(struct sctp_tcb *stcb, struct sockaddr *sa, 1046 uint16_t type) 1047 { 1048 struct sctp_asconf_addr *aa, *aa_next; 1049 1050 /* see if peer supports ASCONF */ 1051 if (stcb->asoc.peer_supports_asconf == 0) { 1052 #ifdef SCTP_DEBUG 1053 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1054 printf("asconf_queue_add_sa: peer doesn't support ASCONF\n"); 1055 } 1056 #endif /* SCTP_DEBUG */ 1057 return (-1); 1058 } 1059 1060 /* make sure the request isn't already in the queue */ 1061 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1062 aa = aa_next) { 1063 aa_next = TAILQ_NEXT(aa, next); 1064 /* address match? */ 1065 if (sctp_asconf_addr_match(aa, sa) == 0) 1066 continue; 1067 /* is the request already in queue (sent or not) */ 1068 if (aa->ap.aph.ph.param_type == type) { 1069 #ifdef SCTP_DEBUG 1070 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1071 printf("asconf_queue_add_sa: request already exists\n"); 1072 } 1073 #endif /* SCTP_DEBUG */ 1074 return (-1); 1075 } 1076 1077 /* is the negative request already in queue, and not sent */ 1078 if (aa->sent == 1) 1079 continue; 1080 if (type == SCTP_ADD_IP_ADDRESS && 1081 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1082 /* add requested, delete already queued */ 1083 1084 /* delete the existing entry in the queue */ 1085 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1086 /* free the entry */ 1087 free(aa, M_PCB); 1088 #ifdef SCTP_DEBUG 1089 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1090 printf("asconf_queue_add_sa: removing queued delete request\n"); 1091 } 1092 #endif /* SCTP_DEBUG */ 1093 return (-1); 1094 } else if (type == SCTP_DEL_IP_ADDRESS && 1095 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1096 /* delete requested, add already queued */ 1097 1098 /* delete the existing entry in the queue */ 1099 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1100 /* take the entry off the appropriate list */ 1101 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1); 1102 /* free the entry */ 1103 free(aa, M_PCB); 1104 #ifdef SCTP_DEBUG 1105 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1106 printf("asconf_queue_add_sa: removing queued add request\n"); 1107 } 1108 #endif /* SCTP_DEBUG */ 1109 return (-1); 1110 } 1111 } /* for each aa */ 1112 1113 /* adding new request to the queue */ 1114 aa = malloc(sizeof(*aa), M_PCB, M_NOWAIT); 1115 if (aa == NULL) { 1116 /* didn't get memory */ 1117 #ifdef SCTP_DEBUG 1118 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1119 printf("asconf_queue_add_sa: failed to get memory!\n"); 1120 } 1121 #endif /* SCTP_DEBUG */ 1122 return (-1); 1123 } 1124 /* fill in asconf address parameter fields */ 1125 /* top level elements are "networked" during send */ 1126 aa->ap.aph.ph.param_type = type; 1127 aa->ifa = sctp_find_ifa_by_addr(sa); 1128 /* correlation_id filled in during send routine later... */ 1129 if (sa->sa_family == AF_INET6) { 1130 /* IPv6 address */ 1131 struct sockaddr_in6 *sin6; 1132 1133 sin6 = (struct sockaddr_in6 *)sa; 1134 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1135 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1136 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1137 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1138 sizeof(struct in6_addr)); 1139 } else if (sa->sa_family == AF_INET) { 1140 /* IPv4 address */ 1141 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1142 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1143 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1144 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1145 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1146 sizeof(struct in_addr)); 1147 } else { 1148 /* invalid family! */ 1149 return (-1); 1150 } 1151 aa->sent = 0; /* clear sent flag */ 1152 1153 /* 1154 * if we are deleting an address it should go out last 1155 * otherwise, add it to front of the pending queue 1156 */ 1157 if (type == SCTP_ADD_IP_ADDRESS) { 1158 /* add goes to the front of the queue */ 1159 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next); 1160 #ifdef SCTP_DEBUG 1161 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1162 printf("asconf_queue_add_sa: appended asconf ADD_IP_ADDRESS\n"); 1163 } 1164 #endif /* SCTP_DEBUG */ 1165 } else { 1166 /* delete and set primary goes to the back of the queue */ 1167 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1168 #ifdef SCTP_DEBUG 1169 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1170 if (type == SCTP_DEL_IP_ADDRESS) { 1171 printf("asconf_queue_add_sa: inserted asconf DEL_IP_ADDRESS\n"); 1172 } else { 1173 printf("asconf_queue_add_sa: inserted asconf SET_PRIM_ADDR\n"); 1174 } 1175 } 1176 #endif /* SCTP_DEBUG */ 1177 } 1178 1179 return (0); 1180 } 1181 1182 /* 1183 * find a specific asconf param on our "sent" queue 1184 */ 1185 static struct sctp_asconf_addr * 1186 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1187 { 1188 struct sctp_asconf_addr *aa; 1189 1190 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1191 if (aa->ap.aph.correlation_id == correlation_id && 1192 aa->sent == 1) { 1193 /* found it */ 1194 return (aa); 1195 } 1196 } 1197 /* didn't find it */ 1198 return (NULL); 1199 } 1200 1201 /* 1202 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter 1203 * and do notifications based on the error response 1204 */ 1205 static void 1206 sctp_asconf_process_error(struct sctp_tcb *stcb, 1207 struct sctp_asconf_paramhdr *aph) 1208 { 1209 struct sctp_error_cause *eh; 1210 struct sctp_paramhdr *ph; 1211 uint16_t param_type; 1212 uint16_t error_code; 1213 1214 eh = (struct sctp_error_cause *)(aph + 1); 1215 ph = (struct sctp_paramhdr *)(eh + 1); 1216 /* validate lengths */ 1217 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1218 htons(aph->ph.param_length)) { 1219 /* invalid error cause length */ 1220 #ifdef SCTP_DEBUG 1221 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1222 printf("asconf_process_error: cause element too long\n"); 1223 } 1224 #endif /* SCTP_DEBUG */ 1225 return; 1226 } 1227 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1228 htons(eh->length)) { 1229 /* invalid included TLV length */ 1230 #ifdef SCTP_DEBUG 1231 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1232 printf("asconf_process_error: included TLV too long\n"); 1233 } 1234 #endif /* SCTP_DEBUG */ 1235 return; 1236 } 1237 1238 /* which error code ? */ 1239 error_code = ntohs(eh->code); 1240 param_type = ntohs(aph->ph.param_type); 1241 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1242 switch (error_code) { 1243 case SCTP_ERROR_RESOURCE_SHORTAGE: 1244 /* we allow ourselves to "try again" for this error */ 1245 break; 1246 default: 1247 /* peer can't handle it... */ 1248 switch (param_type) { 1249 case SCTP_ADD_IP_ADDRESS: 1250 case SCTP_DEL_IP_ADDRESS: 1251 stcb->asoc.peer_supports_asconf = 0; 1252 break; 1253 case SCTP_SET_PRIM_ADDR: 1254 stcb->asoc.peer_supports_asconf_setprim = 0; 1255 break; 1256 default: 1257 break; 1258 } 1259 } 1260 } 1261 1262 /* 1263 * process an asconf queue param 1264 * aparam: parameter to process, will be removed from the queue 1265 * flag: 1=success, 0=failure 1266 */ 1267 static void 1268 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1269 struct sctp_asconf_addr *aparam, uint32_t flag) 1270 { 1271 uint16_t param_type; 1272 1273 /* process this param */ 1274 param_type = aparam->ap.aph.ph.param_type; 1275 #ifdef SCTP_DEBUG 1276 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1277 printf("process_param_ack: handling asconf parameter type=%xh\n", param_type); 1278 } 1279 #endif /* SCTP_DEBUG */ 1280 switch (param_type) { 1281 case SCTP_ADD_IP_ADDRESS: 1282 #ifdef SCTP_DEBUG 1283 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1284 printf("process_param_ack: added IP address\n"); 1285 } 1286 #endif /* SCTP_DEBUG */ 1287 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag); 1288 break; 1289 case SCTP_DEL_IP_ADDRESS: 1290 #ifdef SCTP_DEBUG 1291 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1292 printf("process_param_ack: deleted IP address\n"); 1293 } 1294 #endif /* SCTP_DEBUG */ 1295 /* nothing really to do... lists already updated */ 1296 break; 1297 case SCTP_SET_PRIM_ADDR: 1298 /* nothing to do... peer may start using this addr */ 1299 if (flag == 0) 1300 stcb->asoc.peer_supports_asconf_setprim = 0; 1301 break; 1302 default: 1303 /* should NEVER happen */ 1304 break; 1305 } /* switch */ 1306 1307 /* remove the param and free it */ 1308 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1309 free(aparam, M_PCB); 1310 } 1311 1312 /* 1313 * cleanup from a bad asconf ack parameter 1314 */ 1315 static void 1316 sctp_asconf_ack_clear(struct sctp_tcb *stcb) 1317 { 1318 /* assume peer doesn't really know how to do asconfs */ 1319 stcb->asoc.peer_supports_asconf = 0; 1320 stcb->asoc.peer_supports_asconf_setprim = 0; 1321 /* XXX we could free the pending queue here */ 1322 } 1323 1324 void 1325 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1326 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1327 struct sctp_nets *net) 1328 { 1329 struct sctp_association *asoc; 1330 uint32_t serial_num; 1331 uint16_t ack_length; 1332 struct sctp_asconf_paramhdr *aph; 1333 struct sctp_asconf_addr *aa, *aa_next; 1334 uint32_t last_error_id = 0; /* last error correlation id */ 1335 uint32_t id; 1336 struct sctp_asconf_addr *ap; 1337 /* asconf param buffer */ 1338 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER]; 1339 1340 /* verify minimum length */ 1341 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1342 #ifdef SCTP_DEBUG 1343 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1344 printf("handle_asconf_ack: chunk too small = %xh\n", 1345 ntohs(cp->ch.chunk_length)); 1346 } 1347 #endif /* SCTP_DEBUG */ 1348 return; 1349 } 1350 1351 asoc = &stcb->asoc; 1352 serial_num = ntohl(cp->serial_number); 1353 1354 /* 1355 * NOTE: we may want to handle this differently- currently, we 1356 * will abort when we get an ack for the expected serial number + 1 1357 * (eg. we didn't send it), process an ack normally if it is the 1358 * expected serial number, and re-send the previous ack for *ALL* 1359 * other serial numbers 1360 */ 1361 1362 /* 1363 * if the serial number is the next expected, but I didn't send it, 1364 * abort the asoc, since someone probably just hijacked us... 1365 */ 1366 if (serial_num == (asoc->asconf_seq_out + 1)) { 1367 sctp_abort_an_association(stcb->sctp_ep, stcb, 1368 SCTP_ERROR_ILLEGAL_ASCONF_ACK, NULL); 1369 #ifdef SCTP_DEBUG 1370 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1371 printf("handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1372 } 1373 #endif /* SCTP_DEBUG */ 1374 return; 1375 } 1376 1377 if (serial_num != asoc->asconf_seq_out) { 1378 /* got a duplicate/unexpected ASCONF-ACK */ 1379 #ifdef SCTP_DEBUG 1380 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1381 printf("handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", serial_num, asoc->asconf_seq_out); 1382 } 1383 #endif /* SCTP_DEBUG */ 1384 return; 1385 } 1386 /* stop our timer */ 1387 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net); 1388 1389 /* process the ASCONF-ACK contents */ 1390 ack_length = ntohs(cp->ch.chunk_length) - 1391 sizeof(struct sctp_asconf_ack_chunk); 1392 offset += sizeof(struct sctp_asconf_ack_chunk); 1393 /* process through all parameters */ 1394 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1395 unsigned int param_length, param_type; 1396 1397 /* get pointer to next asconf parameter */ 1398 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1399 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1400 if (aph == NULL) { 1401 /* can't get an asconf paramhdr */ 1402 sctp_asconf_ack_clear(stcb); 1403 return; 1404 } 1405 param_type = ntohs(aph->ph.param_type); 1406 param_length = ntohs(aph->ph.param_length); 1407 if (param_length > ack_length) { 1408 sctp_asconf_ack_clear(stcb); 1409 return; 1410 } 1411 if (param_length < sizeof(struct sctp_paramhdr)) { 1412 sctp_asconf_ack_clear(stcb); 1413 return; 1414 } 1415 1416 /* get the complete parameter... */ 1417 if (param_length > sizeof(aparam_buf)) { 1418 #ifdef SCTP_DEBUG 1419 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1420 printf("param length (%u) larger than buffer size!\n", param_length); 1421 } 1422 #endif /* SCTP_DEBUG */ 1423 sctp_asconf_ack_clear(stcb); 1424 return; 1425 } 1426 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1427 if (aph == NULL) { 1428 sctp_asconf_ack_clear(stcb); 1429 return; 1430 } 1431 /* correlation_id is transparent to peer, no ntohl needed */ 1432 id = aph->correlation_id; 1433 1434 switch (param_type) { 1435 case SCTP_ERROR_CAUSE_IND: 1436 last_error_id = id; 1437 /* find the corresponding asconf param in our queue */ 1438 ap = sctp_asconf_find_param(stcb, id); 1439 if (ap == NULL) { 1440 /* hmm... can't find this in our queue! */ 1441 break; 1442 } 1443 /* process the parameter, failed flag */ 1444 sctp_asconf_process_param_ack(stcb, ap, 0); 1445 /* process the error response */ 1446 sctp_asconf_process_error(stcb, aph); 1447 break; 1448 case SCTP_SUCCESS_REPORT: 1449 /* find the corresponding asconf param in our queue */ 1450 ap = sctp_asconf_find_param(stcb, id); 1451 if (ap == NULL) { 1452 /* hmm... can't find this in our queue! */ 1453 break; 1454 } 1455 /* process the parameter, success flag */ 1456 sctp_asconf_process_param_ack(stcb, ap, 1); 1457 break; 1458 default: 1459 break; 1460 } /* switch */ 1461 1462 /* update remaining ASCONF-ACK message length to process */ 1463 ack_length -= SCTP_SIZE32(param_length); 1464 if (ack_length <= 0) { 1465 /* no more data in the mbuf chain */ 1466 break; 1467 } 1468 offset += SCTP_SIZE32(param_length); 1469 } /* while */ 1470 1471 /* 1472 * if there are any "sent" params still on the queue, these are 1473 * implicitly "success", or "failed" (if we got an error back) 1474 * ... so process these appropriately 1475 * 1476 * we assume that the correlation_id's are monotonically increasing 1477 * beginning from 1 and that we don't have *that* many outstanding 1478 * at any given time 1479 */ 1480 if (last_error_id == 0) 1481 last_error_id--; /* set to "max" value */ 1482 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1483 aa = aa_next) { 1484 aa_next = TAILQ_NEXT(aa, next); 1485 if (aa->sent == 1) { 1486 /* 1487 * implicitly successful or failed 1488 * if correlation_id < last_error_id, then success 1489 * else, failure 1490 */ 1491 if (aa->ap.aph.correlation_id < last_error_id) 1492 sctp_asconf_process_param_ack(stcb, aa, 1493 SCTP_SUCCESS_REPORT); 1494 else 1495 sctp_asconf_process_param_ack(stcb, aa, 1496 SCTP_ERROR_CAUSE_IND); 1497 } else { 1498 /* 1499 * since we always process in order (FIFO queue) 1500 * if we reach one that hasn't been sent, the 1501 * rest should not have been sent either. 1502 * so, we're done... 1503 */ 1504 break; 1505 } 1506 } 1507 1508 /* update the next sequence number to use */ 1509 asoc->asconf_seq_out++; 1510 /* remove the old ASCONF on our outbound queue */ 1511 sctp_toss_old_asconf(stcb); 1512 /* clear the sent flag to allow new ASCONFs */ 1513 asoc->asconf_sent = 0; 1514 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1515 /* we have more params, so restart our timer */ 1516 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1517 stcb, net); 1518 } 1519 } 1520 1521 /* is this an interface that we care about at all? */ 1522 static uint32_t 1523 sctp_is_desired_interface_type(struct ifaddr *ifa) 1524 { 1525 int result; 1526 1527 /* check the interface type to see if it's one we care about */ 1528 switch (ifa->ifa_ifp->if_type) { 1529 case IFT_ETHER: 1530 case IFT_ISO88023: 1531 case IFT_ISO88025: 1532 case IFT_STARLAN: 1533 case IFT_P10: 1534 case IFT_P80: 1535 case IFT_HY: 1536 case IFT_FDDI: 1537 case IFT_PPP: 1538 case IFT_XETHER: 1539 case IFT_SLIP: 1540 case IFT_GIF: 1541 result = 1; 1542 break; 1543 default: 1544 #ifdef SCTP_DEBUG 1545 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1546 printf("ignoring interface type = %u\n", 1547 ifa->ifa_ifp->if_type); 1548 } 1549 #endif /* SCTP_DEBUG */ 1550 result = 0; 1551 } /* end switch */ 1552 1553 return (result); 1554 } 1555 1556 static uint32_t 1557 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1558 { 1559 struct sockaddr_in6 *sin6 /* , *net6 */ ; 1560 /*struct sctp_nets *net;*/ 1561 1562 if (sa->sa_family != AF_INET6) { 1563 /* wrong family */ 1564 return (0); 1565 } 1566 1567 sin6 = (struct sockaddr_in6 *)sa; 1568 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1569 /* not link local address */ 1570 return (0); 1571 } 1572 #if 0 1573 /* hunt through our destination nets list for this scope_id */ 1574 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1575 if ((rtcache_getdst(&net->ro))->sa_family != 1576 AF_INET6) 1577 continue; 1578 net6 = (struct sockaddr_in6 *)rtcache_getdst(&net->ro); 1579 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1580 continue; 1581 if (sctp_is_same_scope(sin6, net6)) { 1582 /* found one */ 1583 return (1); 1584 } 1585 } 1586 #endif 1587 /* didn't find one */ 1588 return (0); 1589 } 1590 1591 /* 1592 * address management functions 1593 */ 1594 static void 1595 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1596 struct ifaddr *ifa, uint16_t type) 1597 { 1598 int status; 1599 #ifdef SCTP_DEBUG 1600 char buf[128]; /* for address in string format */ 1601 #endif /* SCTP_DEBUG */ 1602 1603 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 && 1604 (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) { 1605 /* subset bound, no ASCONF allowed case, so ignore */ 1606 return; 1607 } 1608 1609 /* 1610 * note: we know this is not the subset bound, no ASCONF case 1611 * eg. this is boundall or subset bound w/ASCONF allowed 1612 */ 1613 1614 /* first, make sure it's a good address family */ 1615 if (ifa->ifa_addr->sa_family != AF_INET6 && 1616 ifa->ifa_addr->sa_family != AF_INET) { 1617 return; 1618 } 1619 1620 /* make sure we're "allowed" to add this type of addr */ 1621 if (ifa->ifa_addr->sa_family == AF_INET6) { 1622 struct in6_ifaddr *ifa6; 1623 1624 /* invalid if we're not a v6 endpoint */ 1625 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1626 return; 1627 /* is the v6 addr really valid ? */ 1628 ifa6 = (struct in6_ifaddr *)ifa; 1629 if (IFA6_IS_DEPRECATED(ifa6) || 1630 (ifa6->ia6_flags & 1631 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) { 1632 /* can't use an invalid address */ 1633 return; 1634 } 1635 } 1636 1637 /* put this address on the "pending/do not use yet" list */ 1638 /* 1639 * Note: we do this primarily for the subset bind case 1640 * We don't have scoping flags at the EP level, so we must 1641 * add link local/site local addresses to the EP, then need 1642 * to "negate" them here. Recall that this routine is only 1643 * called for the subset bound w/ASCONF allowed case. 1644 */ 1645 1646 /* 1647 * do a scope_id check against any link local addresses 1648 * in the destination nets list to see if we should put 1649 * this local address on the pending list or not 1650 * eg. don't put on the list if we have a link local 1651 * destination with the same scope_id 1652 */ 1653 if (type == SCTP_ADD_IP_ADDRESS) { 1654 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) { 1655 sctp_add_local_addr_assoc(stcb, ifa); 1656 #ifdef SCTP_DEBUG 1657 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1658 printf("addr_mgmt_assoc: added to pending list "); 1659 sctp_print_address(ifa->ifa_addr); 1660 } 1661 #endif /* SCTP_DEBUG */ 1662 } 1663 } 1664 /* 1665 * check address scope 1666 * if address is out of scope, don't queue anything... 1667 * note: this would leave the address on both inp and asoc lists 1668 */ 1669 if (ifa->ifa_addr->sa_family == AF_INET6) { 1670 char ip6buf[INET6_ADDRSTRLEN]; 1671 struct sockaddr_in6 *sin6; 1672 1673 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1674 #ifdef SCTP_DEBUG 1675 strlcpy(buf, IN6_PRINT(ip6buf, &sin6->sin6_addr), sizeof(buf)); 1676 #endif /* SCTP_DEBUG */ 1677 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1678 /* we skip unspecifed addresses */ 1679 #ifdef SCTP_DEBUG 1680 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1681 printf("addr_mgmt_assoc: unspecified IPv6 addr\n"); 1682 } 1683 #endif /* SCTP_DEBUG */ 1684 return; 1685 } 1686 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1687 if (stcb->asoc.local_scope == 0) { 1688 #ifdef SCTP_DEBUG 1689 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1690 printf("addr_mgmt_assoc: skipping link local IPv6 addr: %s\n", buf); 1691 } 1692 #endif /* SCTP_DEBUG */ 1693 return; 1694 } 1695 /* is it the right link local scope? */ 1696 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) { 1697 #ifdef SCTP_DEBUG 1698 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1699 printf("addr_mgmt_assoc: skipping link local IPv6 addr: %s, wrong scope_id\n", buf); 1700 } 1701 #endif /* SCTP_DEBUG */ 1702 return; 1703 } 1704 } 1705 if (stcb->asoc.site_scope == 0 && 1706 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1707 #ifdef SCTP_DEBUG 1708 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1709 printf("addr_mgmt_assoc: skipping site local IPv6 addr: %s\n", buf); 1710 } 1711 #endif /* SCTP_DEBUG */ 1712 return; 1713 } 1714 } else if (ifa->ifa_addr->sa_family == AF_INET) { 1715 struct sockaddr_in *sin; 1716 struct in6pcb *inp6; 1717 1718 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1719 /* invalid if we are a v6 only endpoint */ 1720 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1721 (inp6->in6p_flags & IN6P_IPV6_V6ONLY) 1722 ) 1723 return; 1724 1725 sin = (struct sockaddr_in *)ifa->ifa_addr; 1726 #ifdef SCTP_DEBUG 1727 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf)); 1728 #endif /* SCTP_DEBUG */ 1729 if (sin->sin_addr.s_addr == 0) { 1730 /* we skip unspecifed addresses */ 1731 #ifdef SCTP_DEBUG 1732 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1733 printf("addr_mgmt_assoc: unspecified IPv4 addr\n"); 1734 } 1735 #endif /* SCTP_DEBUG */ 1736 return; 1737 } 1738 if (stcb->asoc.ipv4_local_scope == 0 && 1739 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1740 #ifdef SCTP_DEBUG 1741 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1742 printf("addr_mgmt_assoc: skipping private IPv4 addr: %s\n", buf); 1743 } 1744 #endif /* SCTP_DEBUG */ 1745 return; 1746 } 1747 } else { 1748 /* else, not AF_INET or AF_INET6, so skip */ 1749 #ifdef SCTP_DEBUG 1750 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1751 printf("addr_mgmt_assoc: not AF_INET or AF_INET6\n"); 1752 } 1753 #endif /* SCTP_DEBUG */ 1754 return; 1755 } 1756 1757 /* queue an asconf for this address add/delete */ 1758 if (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) { 1759 /* does the peer do asconf? */ 1760 if (stcb->asoc.peer_supports_asconf) { 1761 /* queue an asconf for this addr */ 1762 status = sctp_asconf_queue_add(stcb, ifa, type); 1763 /* 1764 * if queued ok, and in correct state, set the 1765 * ASCONF timer 1766 * if in non-open state, we will set this timer 1767 * when the state does go open and do all the 1768 * asconf's 1769 */ 1770 if (status == 0 && 1771 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1772 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1773 stcb, stcb->asoc.primary_destination); 1774 } 1775 } 1776 } else { 1777 /* this is the boundall, no ASCONF case */ 1778 #if 0 /* assume kernel will delete this very shortly; add done above */ 1779 if (type == SCTP_DEL_IP_ADDRESS) { 1780 /* if deleting, add this addr to the do not use list */ 1781 sctp_add_local_addr_assoc(stcb, ifa); 1782 } 1783 #endif 1784 } 1785 } 1786 1787 static void 1788 sctp_addr_mgmt_ep(struct sctp_inpcb *inp, struct ifaddr *ifa, uint16_t type) 1789 { 1790 struct sctp_tcb *stcb; 1791 int s; 1792 1793 SCTP_INP_WLOCK(inp); 1794 /* make sure we're "allowed" to add this type of addr */ 1795 if (ifa->ifa_addr->sa_family == AF_INET6) { 1796 struct in6_ifaddr *ifa6; 1797 1798 /* invalid if we're not a v6 endpoint */ 1799 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1800 SCTP_INP_WUNLOCK(inp); 1801 return; 1802 } 1803 /* is the v6 addr really valid ? */ 1804 ifa6 = (struct in6_ifaddr *)ifa; 1805 if (IFA6_IS_DEPRECATED(ifa6) || 1806 (ifa6->ia6_flags & 1807 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) { 1808 /* can't use an invalid address */ 1809 SCTP_INP_WUNLOCK(inp); 1810 return; 1811 } 1812 } else if (ifa->ifa_addr->sa_family == AF_INET) { 1813 /* invalid if we are a v6 only endpoint */ 1814 struct in6pcb *inp6; 1815 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1816 1817 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1818 (inp6->in6p_flags & IN6P_IPV6_V6ONLY) 1819 ) { 1820 SCTP_INP_WUNLOCK(inp); 1821 return; 1822 } 1823 } else { 1824 /* invalid address family */ 1825 SCTP_INP_WUNLOCK(inp); 1826 return; 1827 } 1828 /* is this endpoint subset bound ? */ 1829 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1830 /* subset bound endpoint */ 1831 if ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) { 1832 /* 1833 * subset bound, but ASCONFs not allowed... 1834 * if adding, nothing to do, since not allowed 1835 * if deleting, remove address from endpoint 1836 * peer will have to "timeout" this addr 1837 */ 1838 if (type == SCTP_DEL_IP_ADDRESS) { 1839 sctp_del_local_addr_ep(inp, ifa); 1840 } 1841 /* no asconfs to queue for this inp... */ 1842 SCTP_INP_WUNLOCK(inp); 1843 return; 1844 } else { 1845 /* 1846 * subset bound, ASCONFs allowed... 1847 * if adding, add address to endpoint list 1848 * if deleting, remove address from endpoint 1849 */ 1850 if (type == SCTP_ADD_IP_ADDRESS) { 1851 sctp_add_local_addr_ep(inp, ifa); 1852 } else { 1853 sctp_del_local_addr_ep(inp, ifa); 1854 } 1855 /* drop through and notify all asocs */ 1856 } 1857 } 1858 1859 s = splsoftnet(); 1860 /* process for all associations for this endpoint */ 1861 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 1862 SCTP_TCB_LOCK(stcb); 1863 sctp_addr_mgmt_assoc(inp, stcb, ifa, type); 1864 SCTP_TCB_UNLOCK(stcb); 1865 } /* for each stcb */ 1866 splx(s); 1867 SCTP_INP_WUNLOCK(inp); 1868 } 1869 1870 /* 1871 * restrict the use of this address 1872 */ 1873 static void 1874 sctp_addr_mgmt_restrict_ep(struct sctp_inpcb *inp, struct ifaddr *ifa) 1875 { 1876 struct sctp_tcb *stcb; 1877 int s; 1878 1879 /* is this endpoint bound to all? */ 1880 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1881 /* 1882 * Nothing to do for subset bound case. 1883 * Allow sctp_bindx() to manage the address lists 1884 */ 1885 return; 1886 } 1887 1888 s = splsoftnet(); 1889 SCTP_INP_RLOCK(inp); 1890 /* process for all associations for this endpoint */ 1891 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 1892 /* put this address on the "pending/do not use yet" list */ 1893 SCTP_TCB_LOCK(stcb); 1894 sctp_add_local_addr_assoc(stcb, ifa); 1895 SCTP_TCB_UNLOCK(stcb); 1896 #ifdef SCTP_DEBUG 1897 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1898 printf("restrict_ep: added addr to unusable list\n"); 1899 } 1900 #endif /* SCTP_DEBUG */ 1901 } /* for each stcb */ 1902 splx(s); 1903 SCTP_INP_RUNLOCK(inp); 1904 } 1905 1906 /* 1907 * this is only called for kernel initiated address changes 1908 * eg. it will check the PCB_FLAGS_AUTO_ASCONF flag 1909 */ 1910 static void 1911 sctp_addr_mgmt(struct ifaddr *ifa, uint16_t type) { 1912 struct sockaddr *sa; 1913 struct sctp_inpcb *inp; 1914 1915 /* make sure we care about this interface... */ 1916 if (!sctp_is_desired_interface_type(ifa)) { 1917 #ifdef SCTP_DEBUG 1918 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1919 printf("sctp_addr_mgmt: ignoring this interface\n"); 1920 } 1921 #endif /* SCTP_DEBUG */ 1922 return; 1923 } 1924 1925 sa = ifa->ifa_addr; 1926 if (sa->sa_family != AF_INET && sa->sa_family != AF_INET6) 1927 return; 1928 1929 #ifdef SCTP_DEBUG 1930 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1931 if (type == SCTP_ADD_IP_ADDRESS) 1932 printf("sctp_addr_mgmt: kernel adds "); 1933 else 1934 printf("sctp_addr_mgmt: kernel deletes "); 1935 sctp_print_address(sa); 1936 } 1937 #endif /* SCTP_DEBUG */ 1938 1939 /* go through all our PCB's */ 1940 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 1941 if (inp->sctp_flags & SCTP_PCB_FLAGS_AUTO_ASCONF) { 1942 sctp_addr_mgmt_ep(inp, ifa, type); 1943 } else { 1944 /* this address is going away anyways... */ 1945 if (type == SCTP_DEL_IP_ADDRESS) 1946 return; 1947 /* (temporarily) restrict this address */ 1948 sctp_addr_mgmt_restrict_ep(inp, ifa); 1949 } 1950 /* else, not allowing automatic asconf's, so ignore */ 1951 } /* for each inp */ 1952 } 1953 1954 /* 1955 * add/delete IP address requests from kernel (via routing change) 1956 * assumed that the address is non-broadcast, non-multicast 1957 * all addresses are passed from any type of interface-- need to filter 1958 * duplicate addresses may get requested 1959 */ 1960 1961 void 1962 sctp_add_ip_address(struct ifaddr *ifa) 1963 { 1964 sctp_addr_mgmt(ifa, SCTP_ADD_IP_ADDRESS); 1965 } 1966 1967 void 1968 sctp_delete_ip_address(struct ifaddr *ifa) 1969 { 1970 struct sctp_inpcb *inp; 1971 1972 /* process the delete */ 1973 sctp_addr_mgmt(ifa, SCTP_DEL_IP_ADDRESS); 1974 1975 /* 1976 * need to remove this ifaddr from any cached routes 1977 * and also any from any assoc "restricted/pending" lists 1978 */ 1979 /* make sure we care about this interface... */ 1980 if (!sctp_is_desired_interface_type(ifa)) { 1981 #ifdef SCTP_DEBUG 1982 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1983 printf("sctp_delete_ip_address: ignoring this interface\n"); 1984 } 1985 #endif /* SCTP_DEBUG */ 1986 return; 1987 } 1988 1989 /* go through all our PCB's */ 1990 SCTP_INP_INFO_RLOCK(); 1991 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 1992 struct sctp_tcb *stcb; 1993 struct sctp_laddr *laddr, *laddr_next; 1994 1995 /* process for all associations for this endpoint */ 1996 SCTP_INP_RLOCK(inp); 1997 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 1998 struct sctp_nets *net; 1999 2000 /* process through the nets list */ 2001 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2002 rtcache_free(&net->ro); /* XXX - was clear */ 2003 } /* for each net */ 2004 /* process through the asoc "pending" list */ 2005 laddr = LIST_FIRST(&stcb->asoc.sctp_local_addr_list); 2006 while (laddr != NULL) { 2007 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr); 2008 /* remove if in use */ 2009 if (laddr->ifa == ifa) { 2010 sctp_remove_laddr(laddr); 2011 } 2012 laddr = laddr_next; 2013 } /* while */ 2014 } /* for each stcb */ 2015 /* process through the inp bound addr list */ 2016 laddr = LIST_FIRST(&inp->sctp_addr_list); 2017 while (laddr != NULL) { 2018 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr); 2019 /* remove if in use */ 2020 if (laddr->ifa == ifa) { 2021 sctp_remove_laddr(laddr); 2022 } 2023 laddr = laddr_next; 2024 } /* while */ 2025 SCTP_INP_RUNLOCK(inp); 2026 } /* for each inp */ 2027 SCTP_INP_INFO_RUNLOCK(); 2028 } 2029 2030 /* 2031 * sa is the sockaddr to ask the peer to set primary to 2032 * returns: 0 = completed, -1 = error 2033 */ 2034 int32_t 2035 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2036 { 2037 /* NOTE: we currently don't check the validity of the address! */ 2038 2039 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2040 if (!sctp_asconf_queue_add_sa(stcb, sa, SCTP_SET_PRIM_ADDR)) { 2041 /* set primary queuing succeeded */ 2042 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2043 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2044 stcb->sctp_ep, stcb, 2045 stcb->asoc.primary_destination); 2046 } 2047 #ifdef SCTP_DEBUG 2048 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2049 printf("set_primary_ip_address_sa: queued on tcb=%p, ", 2050 stcb); 2051 sctp_print_address(sa); 2052 } 2053 #endif /* SCTP_DEBUG */ 2054 } else { 2055 #ifdef SCTP_DEBUG 2056 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2057 printf("set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2058 stcb); 2059 sctp_print_address(sa); 2060 } 2061 #endif /* SCTP_DEBUG */ 2062 return (-1); 2063 } 2064 return (0); 2065 } 2066 2067 void 2068 sctp_set_primary_ip_address(struct ifaddr *ifa) 2069 { 2070 struct sctp_inpcb *inp; 2071 2072 /* make sure we care about this interface... */ 2073 if (!sctp_is_desired_interface_type(ifa)) { 2074 #ifdef SCTP_DEBUG 2075 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2076 printf("set_primary_ip_address: ignoring this interface\n"); 2077 } 2078 #endif /* SCTP_DEBUG */ 2079 return; 2080 } 2081 2082 /* go through all our PCB's */ 2083 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 2084 struct sctp_tcb *stcb; 2085 2086 /* process for all associations for this endpoint */ 2087 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2088 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2089 if (!sctp_asconf_queue_add(stcb, ifa, 2090 SCTP_SET_PRIM_ADDR)) { 2091 /* set primary queuing succeeded */ 2092 if (SCTP_GET_STATE(&stcb->asoc) == 2093 SCTP_STATE_OPEN) { 2094 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2095 stcb->sctp_ep, stcb, 2096 stcb->asoc.primary_destination); 2097 } 2098 #ifdef SCTP_DEBUG 2099 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2100 printf("set_primary_ip_address: queued on stcb=%p, ", 2101 stcb); 2102 sctp_print_address(ifa->ifa_addr); 2103 } 2104 #endif /* SCTP_DEBUG */ 2105 } else { 2106 #ifdef SCTP_DEBUG 2107 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2108 printf("set_primary_ip_address: failed to add to queue, "); 2109 sctp_print_address(ifa->ifa_addr); 2110 } 2111 #endif /* SCTP_DEBUG */ 2112 } 2113 } /* for each stcb */ 2114 } /* for each inp */ 2115 } 2116 2117 static struct sockaddr * 2118 sctp_find_valid_localaddr(struct sctp_tcb *stcb) 2119 { 2120 struct ifnet *ifn; 2121 struct ifaddr *ifa; 2122 int s; 2123 2124 s = pserialize_read_enter(); 2125 IFNET_READER_FOREACH(ifn) { 2126 if (stcb->asoc.loopback_scope == 0 && ifn->if_type == IFT_LOOP) { 2127 /* Skip if loopback_scope not set */ 2128 continue; 2129 } 2130 IFADDR_READER_FOREACH(ifa, ifn) { 2131 if (ifa->ifa_addr->sa_family == AF_INET && 2132 stcb->asoc.ipv4_addr_legal) { 2133 struct sockaddr_in *sin; 2134 2135 sin = (struct sockaddr_in *)ifa->ifa_addr; 2136 if (sin->sin_addr.s_addr == 0) { 2137 /* skip unspecifed addresses */ 2138 continue; 2139 } 2140 if (stcb->asoc.ipv4_local_scope == 0 && 2141 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2142 continue; 2143 2144 if (sctp_is_addr_restricted(stcb, 2145 ifa->ifa_addr)) 2146 continue; 2147 pserialize_read_exit(s); 2148 2149 /* found a valid local v4 address to use */ 2150 return (ifa->ifa_addr); 2151 } else if (ifa->ifa_addr->sa_family == AF_INET6 && 2152 stcb->asoc.ipv6_addr_legal) { 2153 struct sockaddr_in6 *sin6; 2154 struct in6_ifaddr *ifa6; 2155 2156 ifa6 = (struct in6_ifaddr *)ifa; 2157 if (IFA6_IS_DEPRECATED(ifa6) || 2158 (ifa6->ia6_flags & (IN6_IFF_DETACHED | 2159 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) 2160 continue; 2161 2162 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 2163 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2164 /* we skip unspecifed addresses */ 2165 continue; 2166 } 2167 if (stcb->asoc.local_scope == 0 && 2168 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2169 continue; 2170 if (stcb->asoc.site_scope == 0 && 2171 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2172 continue; 2173 2174 pserialize_read_exit(s); 2175 /* found a valid local v6 address to use */ 2176 return (ifa->ifa_addr); 2177 } 2178 } 2179 } 2180 pserialize_read_exit(s); 2181 2182 /* no valid addresses found */ 2183 return (NULL); 2184 } 2185 2186 static struct sockaddr * 2187 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2188 { 2189 struct sctp_laddr *laddr; 2190 2191 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2192 if (laddr->ifa == NULL) { 2193 #ifdef SCTP_DEBUG 2194 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2195 printf("find_valid_localaddr_ep: laddr error\n"); 2196 } 2197 #endif /* SCTP_DEBUG */ 2198 continue; 2199 } 2200 if (laddr->ifa->ifa_addr == NULL) { 2201 #ifdef SCTP_DEBUG 2202 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2203 printf("find_valid_localaddr_ep: laddr->ifa error\n"); 2204 } 2205 #endif /* SCTP_DEBUG */ 2206 continue; 2207 } 2208 /* is the address restricted ? */ 2209 if (sctp_is_addr_restricted(stcb, laddr->ifa->ifa_addr)) 2210 continue; 2211 2212 /* found a valid local address to use */ 2213 return (laddr->ifa->ifa_addr); 2214 } 2215 /* no valid addresses found */ 2216 return (NULL); 2217 } 2218 2219 /* 2220 * builds an ASCONF chunk from queued ASCONF params 2221 * returns NULL on error (no mbuf, no ASCONF params queued, etc) 2222 */ 2223 struct mbuf * 2224 sctp_compose_asconf(struct sctp_tcb *stcb) 2225 { 2226 struct mbuf *m_asconf, *m_asconf_chk; 2227 struct sctp_asconf_addr *aa; 2228 struct sctp_asconf_chunk *acp; 2229 struct sctp_asconf_paramhdr *aph; 2230 struct sctp_asconf_addr_param *aap; 2231 uint32_t p_length; 2232 uint32_t correlation_id = 1; /* 0 is reserved... */ 2233 vaddr_t ptr, lookup_ptr; 2234 uint8_t lookup_used = 0; 2235 2236 /* are there any asconf params to send? */ 2237 if (TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 2238 return (NULL); 2239 } 2240 2241 /* 2242 * get a chunk header mbuf and a cluster for the asconf params 2243 * since it's simpler to fill in the asconf chunk header lookup 2244 * address on the fly 2245 */ 2246 m_asconf_chk = NULL; 2247 MGETHDR(m_asconf_chk, M_DONTWAIT, MT_DATA); 2248 if (m_asconf_chk == NULL) { 2249 /* no mbuf's */ 2250 #ifdef SCTP_DEBUG 2251 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2252 printf("compose_asconf: couldn't get chunk mbuf!\n"); 2253 #endif /* SCTP_DEBUG */ 2254 return (NULL); 2255 } 2256 m_asconf = NULL; 2257 MGETHDR(m_asconf, M_DONTWAIT, MT_HEADER); 2258 if (m_asconf == NULL) { 2259 /* no mbuf's */ 2260 #ifdef SCTP_DEBUG 2261 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2262 printf("compose_asconf: couldn't get mbuf!\n"); 2263 #endif /* SCTP_DEBUG */ 2264 sctp_m_freem(m_asconf_chk); 2265 return (NULL); 2266 } 2267 MCLGET(m_asconf, M_DONTWAIT); 2268 if ((m_asconf->m_flags & M_EXT) != M_EXT) { 2269 /* failed to get cluster buffer */ 2270 #ifdef SCTP_DEBUG 2271 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2272 printf("compose_asconf: couldn't get cluster!\n"); 2273 #endif /* SCTP_DEBUG */ 2274 sctp_m_freem(m_asconf_chk); 2275 sctp_m_freem(m_asconf); 2276 return (NULL); 2277 } 2278 2279 m_asconf_chk->m_len = sizeof(struct sctp_asconf_chunk); 2280 m_asconf->m_len = 0; 2281 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2282 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2283 /* save pointers to lookup address and asconf params */ 2284 lookup_ptr = (vaddr_t)(acp + 1); /* after the header */ 2285 ptr = mtod(m_asconf, vaddr_t); /* beginning of cluster */ 2286 2287 /* fill in chunk header info */ 2288 acp->ch.chunk_type = SCTP_ASCONF; 2289 acp->ch.chunk_flags = 0; 2290 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2291 2292 /* add parameters... up to smallest MTU allowed */ 2293 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2294 /* get the parameter length */ 2295 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2296 /* will it fit in current chunk? */ 2297 if (m_asconf->m_len + p_length > stcb->asoc.smallest_mtu) { 2298 /* won't fit, so we're done with this chunk */ 2299 break; 2300 } 2301 /* assign (and store) a correlation id */ 2302 aa->ap.aph.correlation_id = correlation_id++; 2303 2304 /* 2305 * fill in address if we're doing a delete 2306 * this is a simple way for us to fill in the correlation 2307 * address, which should only be used by the peer if we're 2308 * deleting our source address and adding a new address 2309 * (e.g. renumbering case) 2310 */ 2311 if (lookup_used == 0 && 2312 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2313 struct sctp_ipv6addr_param *lookup; 2314 uint16_t p_size, addr_size; 2315 2316 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2317 lookup->ph.param_type = 2318 htons(aa->ap.addrp.ph.param_type); 2319 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2320 /* copy IPv6 address */ 2321 p_size = sizeof(struct sctp_ipv6addr_param); 2322 addr_size = sizeof(struct in6_addr); 2323 } else { 2324 /* copy IPv4 address */ 2325 p_size = sizeof(struct sctp_ipv4addr_param); 2326 addr_size = sizeof(struct in_addr); 2327 } 2328 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2329 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2330 m_asconf_chk->m_len += SCTP_SIZE32(p_size); 2331 lookup_used = 1; 2332 } 2333 2334 /* copy into current space */ 2335 memcpy((void *)ptr, &aa->ap, p_length); 2336 2337 /* network elements and update lengths */ 2338 aph = (struct sctp_asconf_paramhdr *) ptr; 2339 aap = (struct sctp_asconf_addr_param *) ptr; 2340 /* correlation_id is transparent to peer, no htonl needed */ 2341 aph->ph.param_type = htons(aph->ph.param_type); 2342 aph->ph.param_length = htons(aph->ph.param_length); 2343 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2344 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2345 2346 m_asconf->m_len += SCTP_SIZE32(p_length); 2347 ptr += SCTP_SIZE32(p_length); 2348 2349 /* 2350 * these params are removed off the pending list upon 2351 * getting an ASCONF-ACK back from the peer, just set flag 2352 */ 2353 aa->sent = 1; 2354 } 2355 /* check to see if the lookup addr has been populated yet */ 2356 if (lookup_used == 0) { 2357 /* NOTE: if the address param is optional, can skip this... */ 2358 /* add any valid (existing) address... */ 2359 struct sctp_ipv6addr_param *lookup; 2360 uint16_t p_size, addr_size; 2361 struct sockaddr *found_addr; 2362 vaddr_t addr_ptr; 2363 2364 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2365 found_addr = sctp_find_valid_localaddr(stcb); 2366 else 2367 found_addr = sctp_find_valid_localaddr_ep(stcb); 2368 2369 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2370 if (found_addr != NULL) { 2371 if (found_addr->sa_family == AF_INET6) { 2372 /* copy IPv6 address */ 2373 lookup->ph.param_type = 2374 htons(SCTP_IPV6_ADDRESS); 2375 p_size = sizeof(struct sctp_ipv6addr_param); 2376 addr_size = sizeof(struct in6_addr); 2377 addr_ptr = (vaddr_t)&((struct sockaddr_in6 *) 2378 found_addr)->sin6_addr; 2379 } else { 2380 /* copy IPv4 address */ 2381 lookup->ph.param_type = 2382 htons(SCTP_IPV4_ADDRESS); 2383 p_size = sizeof(struct sctp_ipv4addr_param); 2384 addr_size = sizeof(struct in_addr); 2385 addr_ptr = (vaddr_t)&((struct sockaddr_in *) 2386 found_addr)->sin_addr; 2387 } 2388 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2389 memcpy(lookup->addr, (void *)addr_ptr, addr_size); 2390 m_asconf_chk->m_len += SCTP_SIZE32(p_size); 2391 lookup_used = 1; 2392 } else { 2393 /* uh oh... don't have any address?? */ 2394 #ifdef SCTP_DEBUG 2395 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2396 printf("compose_asconf: no lookup addr!\n"); 2397 #endif /* SCTP_DEBUG */ 2398 /* for now, we send a IPv4 address of 0.0.0.0 */ 2399 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2400 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2401 memset(lookup->addr, 0, sizeof(struct in_addr)); 2402 m_asconf_chk->m_len += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2403 lookup_used = 1; 2404 } 2405 } 2406 2407 /* chain it all together */ 2408 m_asconf_chk->m_next = m_asconf; 2409 m_asconf_chk->m_pkthdr.len = m_asconf_chk->m_len + m_asconf->m_len; 2410 acp->ch.chunk_length = ntohs(m_asconf_chk->m_pkthdr.len); 2411 2412 /* update "sent" flag */ 2413 stcb->asoc.asconf_sent++; 2414 2415 return (m_asconf_chk); 2416 } 2417 2418 /* 2419 * section to handle address changes before an association is up 2420 * eg. changes during INIT/INIT-ACK/COOKIE-ECHO handshake 2421 */ 2422 2423 /* 2424 * processes the (local) addresses in the INIT-ACK chunk 2425 */ 2426 static void 2427 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2428 unsigned int offset, unsigned int length) 2429 { 2430 struct sctp_paramhdr tmp_param, *ph; 2431 uint16_t plen, ptype; 2432 struct sctp_ipv6addr_param addr_store; 2433 struct sockaddr_in6 sin6; 2434 struct sockaddr_in sin; 2435 struct sockaddr *sa; 2436 struct ifaddr *ifa; 2437 2438 #ifdef SCTP_DEBUG 2439 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2440 printf("processing init-ack addresses\n"); 2441 } 2442 #endif /* SCTP_DEBUG */ 2443 2444 /* convert to upper bound */ 2445 length += offset; 2446 2447 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2448 #ifdef SCTP_DEBUG 2449 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2450 printf("process_initack_addrs: invalid offset?\n"); 2451 } 2452 #endif /* SCTP_DEBUG */ 2453 return; 2454 } 2455 2456 /* init the addresses */ 2457 memset(&sin6, 0, sizeof(sin6)); 2458 sin6.sin6_family = AF_INET6; 2459 sin6.sin6_len = sizeof(sin6); 2460 sin6.sin6_port = stcb->rport; 2461 2462 memset(&sin, 0, sizeof(sin)); 2463 sin.sin_len = sizeof(sin); 2464 sin.sin_family = AF_INET; 2465 sin.sin_port = stcb->rport; 2466 2467 /* go through the addresses in the init-ack */ 2468 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2469 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2470 while (ph != NULL) { 2471 ptype = ntohs(ph->param_type); 2472 plen = ntohs(ph->param_length); 2473 if (ptype == SCTP_IPV6_ADDRESS) { 2474 struct sctp_ipv6addr_param *a6p; 2475 /* get the entire IPv6 address param */ 2476 #ifdef SCTP_DEBUG 2477 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2478 printf("process_initack_addrs: checking IPv6 param\n"); 2479 } 2480 #endif /* SCTP_DEBUG */ 2481 a6p = (struct sctp_ipv6addr_param *) 2482 sctp_m_getptr(m, offset, 2483 sizeof(struct sctp_ipv6addr_param), 2484 (uint8_t *)&addr_store); 2485 if (plen != sizeof(struct sctp_ipv6addr_param) || 2486 a6p == NULL) { 2487 #ifdef SCTP_DEBUG 2488 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2489 printf("process_initack_addrs: invalid IPv6 param length\n"); 2490 } 2491 #endif /* SCTP_DEBUG */ 2492 return; 2493 } 2494 memcpy(&sin6.sin6_addr, a6p->addr, 2495 sizeof(struct in6_addr)); 2496 sa = (struct sockaddr *)&sin6; 2497 } else if (ptype == SCTP_IPV4_ADDRESS) { 2498 struct sctp_ipv4addr_param *a4p; 2499 /* get the entire IPv4 address param */ 2500 #ifdef SCTP_DEBUG 2501 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2502 printf("process_initack_addrs: checking IPv4 param\n"); 2503 } 2504 #endif /* SCTP_DEBUG */ 2505 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_ipv4addr_param), (uint8_t *)&addr_store); 2506 if (plen != sizeof(struct sctp_ipv4addr_param) || 2507 a4p == NULL) { 2508 #ifdef SCTP_DEBUG 2509 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2510 printf("process_initack_addrs: invalid IPv4 param length\n"); 2511 } 2512 #endif /* SCTP_DEBUG */ 2513 return; 2514 } 2515 sin.sin_addr.s_addr = a4p->addr; 2516 sa = (struct sockaddr *)&sin; 2517 } else { 2518 #ifdef SCTP_DEBUG 2519 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2520 printf("process_initack_addrs: skipping param type=%xh\n", ptype); 2521 } 2522 #endif /* SCTP_DEBUG */ 2523 goto next_addr; 2524 } 2525 2526 /* see if this address really (still) exists */ 2527 ifa = sctp_find_ifa_by_addr(sa); 2528 if (ifa == NULL) { 2529 /* address doesn't exist anymore */ 2530 int status; 2531 /* are ASCONFs allowed ? */ 2532 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) && 2533 stcb->asoc.peer_supports_asconf) { 2534 /* queue an ASCONF DEL_IP_ADDRESS */ 2535 status = sctp_asconf_queue_add_sa(stcb, sa, 2536 SCTP_DEL_IP_ADDRESS); 2537 /* 2538 * if queued ok, and in correct state, 2539 * set the ASCONF timer 2540 */ 2541 if (status == 0 && 2542 SCTP_GET_STATE(&stcb->asoc) == 2543 SCTP_STATE_OPEN) { 2544 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2545 stcb->sctp_ep, stcb, 2546 stcb->asoc.primary_destination); 2547 } 2548 } 2549 } else { 2550 /* address still exists */ 2551 /* 2552 * if subset bound, ep addr's managed by default 2553 * if not doing ASCONF, add the address to the assoc 2554 */ 2555 if ((stcb->sctp_ep->sctp_flags & 2556 SCTP_PCB_FLAGS_BOUNDALL) == 0 && 2557 (stcb->sctp_ep->sctp_flags & 2558 SCTP_PCB_FLAGS_DO_ASCONF) == 0) { 2559 #ifdef SCTP_DEBUG 2560 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2561 printf("process_initack_addrs: adding local addr to asoc\n"); 2562 } 2563 #endif /* SCTP_DEBUG */ 2564 sctp_add_local_addr_assoc(stcb, ifa); 2565 } 2566 } 2567 2568 next_addr: 2569 /* get next parameter */ 2570 offset += SCTP_SIZE32(plen); 2571 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2572 return; 2573 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2574 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2575 } /* while */ 2576 } 2577 2578 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2579 /* 2580 * checks to see if a specific address is in the initack address list 2581 * returns 1 if found, 0 if not 2582 */ 2583 static uint32_t 2584 sctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, unsigned int offset, 2585 unsigned int length, struct sockaddr *sa) 2586 { 2587 struct sctp_paramhdr tmp_param, *ph; 2588 uint16_t plen, ptype; 2589 struct sctp_ipv6addr_param addr_store; 2590 struct sockaddr_in *sin; 2591 struct sctp_ipv4addr_param *a4p; 2592 #ifdef INET6 2593 struct sockaddr_in6 *sin6, sin6_tmp; 2594 struct sctp_ipv6addr_param *a6p; 2595 #endif /* INET6 */ 2596 2597 if ( 2598 #ifdef INET6 2599 (sa->sa_family != AF_INET6) && 2600 #endif /* INET6 */ 2601 (sa->sa_family != AF_INET)) 2602 return (0); 2603 2604 #ifdef SCTP_DEBUG 2605 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2606 printf("find_initack_addr: starting search for "); 2607 sctp_print_address(sa); 2608 } 2609 #endif /* SCTP_DEBUG */ 2610 /* convert to upper bound */ 2611 length += offset; 2612 2613 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2614 #ifdef SCTP_DEBUG 2615 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2616 printf("find_initack_addr: invalid offset?\n"); 2617 } 2618 #endif /* SCTP_DEBUG */ 2619 return (0); 2620 } 2621 2622 /* go through the addresses in the init-ack */ 2623 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2624 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2625 while (ph != NULL) { 2626 ptype = ntohs(ph->param_type); 2627 plen = ntohs(ph->param_length); 2628 #ifdef INET6 2629 if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) { 2630 /* get the entire IPv6 address param */ 2631 #ifdef SCTP_DEBUG 2632 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2633 printf("addr_in_initack: checking IPv6 param\n"); 2634 } 2635 #endif /* SCTP_DEBUG */ 2636 a6p = (struct sctp_ipv6addr_param *) 2637 sctp_m_getptr(m, offset, 2638 sizeof(struct sctp_ipv6addr_param), 2639 (uint8_t *)&addr_store); 2640 if (plen != sizeof(struct sctp_ipv6addr_param) || 2641 ph == NULL) { 2642 #ifdef SCTP_DEBUG 2643 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2644 printf("addr_in_initack: invalid IPv6 param length\n"); 2645 } 2646 #endif /* SCTP_DEBUG */ 2647 return (0); 2648 } 2649 sin6 = (struct sockaddr_in6 *)sa; 2650 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2651 /* create a copy and clear scope */ 2652 memcpy(&sin6_tmp, sin6, 2653 sizeof(struct sockaddr_in6)); 2654 sin6 = &sin6_tmp; 2655 in6_clearscope(&sin6->sin6_addr); 2656 } 2657 if (memcmp(&sin6->sin6_addr, a6p->addr, 2658 sizeof(struct in6_addr)) == 0) { 2659 /* found it */ 2660 #ifdef SCTP_DEBUG 2661 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2662 printf("addr_in_initack: found IPv6 addr\n"); 2663 } 2664 #endif /* SCTP_DEBUG */ 2665 return (1); 2666 } 2667 } else 2668 #endif /* INET6 */ 2669 2670 if (ptype == SCTP_IPV4_ADDRESS && 2671 sa->sa_family == AF_INET) { 2672 /* get the entire IPv4 address param */ 2673 #ifdef SCTP_DEBUG 2674 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2675 printf("addr_in_initack: checking IPv4 param\n"); 2676 } 2677 #endif /* SCTP_DEBUG */ 2678 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, 2679 offset, sizeof(struct sctp_ipv4addr_param), 2680 (uint8_t *)&addr_store); 2681 if (plen != sizeof(struct sctp_ipv4addr_param) || 2682 ph == NULL) { 2683 #ifdef SCTP_DEBUG 2684 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2685 printf("addr_in_initack: invalid IPv4 param length\n"); 2686 } 2687 #endif /* SCTP_DEBUG */ 2688 return (0); 2689 } 2690 sin = (struct sockaddr_in *)sa; 2691 if (sin->sin_addr.s_addr == a4p->addr) { 2692 /* found it */ 2693 #ifdef SCTP_DEBUG 2694 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2695 printf("addr_in_initack: found IPv4 addr\n"); 2696 } 2697 #endif /* SCTP_DEBUG */ 2698 return (1); 2699 } 2700 } else { 2701 #ifdef SCTP_DEBUG 2702 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2703 printf("addr_in_initack: skipping param type=%xh\n", ptype); 2704 } 2705 #endif /* SCTP_DEBUG */ 2706 } 2707 /* get next parameter */ 2708 offset += SCTP_SIZE32(plen); 2709 if (offset + sizeof(struct sctp_paramhdr) > length) 2710 return (0); 2711 ph = (struct sctp_paramhdr *) 2712 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2713 (uint8_t *)&tmp_param); 2714 } /* while */ 2715 /* not found! */ 2716 #ifdef SCTP_DEBUG 2717 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2718 printf("addr_in_initack: not found!\n"); 2719 } 2720 #endif /* SCTP_DEBUG */ 2721 return (0); 2722 } 2723 2724 /* 2725 * makes sure that the current endpoint local addr list is consistent 2726 * with the new association (eg. subset bound, asconf allowed) 2727 * adds addresses as necessary 2728 */ 2729 static void 2730 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2731 int length, struct sockaddr *init_addr) 2732 { 2733 struct sctp_laddr *laddr; 2734 2735 /* go through the endpoint list */ 2736 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2737 /* be paranoid and validate the laddr */ 2738 if (laddr->ifa == NULL) { 2739 #ifdef SCTP_DEBUG 2740 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2741 printf("check_addr_list_ep: laddr->ifa is NULL"); 2742 } 2743 #endif 2744 continue; 2745 } 2746 if (laddr->ifa->ifa_addr == NULL) { 2747 #ifdef SCTP_DEBUG 2748 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2749 printf("check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 2750 } 2751 #endif 2752 continue; 2753 } 2754 /* do i have it implicitly? */ 2755 if (sctp_cmpaddr(laddr->ifa->ifa_addr, init_addr)) { 2756 #ifdef SCTP_DEBUG 2757 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2758 printf("check_address_list_all: skipping "); 2759 sctp_print_address(laddr->ifa->ifa_addr); 2760 } 2761 #endif /* SCTP_DEBUG */ 2762 continue; 2763 } 2764 /* check to see if in the init-ack */ 2765 if (!sctp_addr_in_initack(stcb, m, offset, length, 2766 laddr->ifa->ifa_addr)) { 2767 /* try to add it */ 2768 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 2769 SCTP_ADD_IP_ADDRESS); 2770 } 2771 } 2772 } 2773 2774 /* 2775 * makes sure that the current kernel address list is consistent 2776 * with the new association (with all addrs bound) 2777 * adds addresses as necessary 2778 */ 2779 static void 2780 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2781 int length, struct sockaddr *init_addr, uint16_t local_scope, 2782 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope) 2783 { 2784 struct ifnet *ifn; 2785 struct ifaddr *ifa; 2786 int s; 2787 2788 /* go through all our known interfaces */ 2789 s = pserialize_read_enter(); 2790 IFNET_READER_FOREACH(ifn) { 2791 if (loopback_scope == 0 && ifn->if_type == IFT_LOOP) { 2792 /* skip loopback interface */ 2793 continue; 2794 } 2795 2796 /* go through each interface address */ 2797 IFADDR_READER_FOREACH(ifa, ifn) { 2798 /* do i have it implicitly? */ 2799 if (sctp_cmpaddr(ifa->ifa_addr, init_addr)) { 2800 #ifdef SCTP_DEBUG 2801 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2802 printf("check_address_list_all: skipping "); 2803 sctp_print_address(ifa->ifa_addr); 2804 } 2805 #endif /* SCTP_DEBUG */ 2806 continue; 2807 } 2808 /* check to see if in the init-ack */ 2809 if (!sctp_addr_in_initack(stcb, m, offset, length, 2810 ifa->ifa_addr)) { 2811 /* try to add it */ 2812 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 2813 ifa, SCTP_ADD_IP_ADDRESS); 2814 } 2815 } /* end foreach ifa */ 2816 } /* end foreach ifn */ 2817 pserialize_read_exit(s); 2818 } 2819 2820 /* 2821 * validates an init-ack chunk (from a cookie-echo) with current addresses 2822 * adds addresses from the init-ack into our local address list, if needed 2823 * queues asconf adds/deletes addresses as needed and makes appropriate 2824 * list changes for source address selection 2825 * m, offset: points to the start of the address list in an init-ack chunk 2826 * length: total length of the address params only 2827 * init_addr: address where my INIT-ACK was sent from 2828 */ 2829 void 2830 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2831 int length, struct sockaddr *init_addr, uint16_t local_scope, 2832 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope) 2833 { 2834 2835 /* process the local addresses in the initack */ 2836 sctp_process_initack_addresses(stcb, m, offset, length); 2837 2838 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2839 /* bound all case */ 2840 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 2841 local_scope, site_scope, ipv4_scope, loopback_scope); 2842 } else { 2843 /* subset bound case */ 2844 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) { 2845 /* asconf's allowed */ 2846 sctp_check_address_list_ep(stcb, m, offset, length, 2847 init_addr); 2848 } 2849 /* else, no asconfs allowed, so what we sent is what we get */ 2850 } 2851 } 2852 2853 /* 2854 * sctp_bindx() support 2855 */ 2856 uint32_t 2857 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, uint16_t type) 2858 { 2859 struct ifaddr *ifa; 2860 2861 if (sa->sa_len == 0) 2862 return (EINVAL); 2863 2864 ifa = sctp_find_ifa_by_addr(sa); 2865 if (ifa != NULL) { 2866 #ifdef INET6 2867 if (ifa->ifa_addr->sa_family == AF_INET6) { 2868 struct in6_ifaddr *ifa6; 2869 ifa6 = (struct in6_ifaddr *)ifa; 2870 if (IFA6_IS_DEPRECATED(ifa6) || 2871 (ifa6->ia6_flags & (IN6_IFF_DETACHED | 2872 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) { 2873 /* Can't bind a non-existent addr. */ 2874 return (EINVAL); 2875 } 2876 } 2877 #endif /* INET6 */ 2878 /* add this address */ 2879 sctp_addr_mgmt_ep(inp, ifa, type); 2880 } else { 2881 /* invalid address! */ 2882 #ifdef SCTP_DEBUG 2883 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2884 printf("addr_mgmt_ep_sa: got invalid address!\n"); 2885 } 2886 #endif /* SCTP_DEBUG */ 2887 return (EADDRNOTAVAIL); 2888 } 2889 return (0); 2890 } 2891
Indexes created Tue Sep 23 22:09:46 GMT 2025