sctp_asconf.c revision 1.11
1 /* $NetBSD: sctp_asconf.c,v 1.11 2017/06/28 14:38:18 rjs 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 1.11 2017/06/28 14:38:18 rjs Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "opt_ipsec.h" 37 #include "opt_inet.h" 38 #include "opt_sctp.h" 39 #endif /* _KERNEL_OPT */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/kernel.h> 48 #include <sys/sysctl.h> 49 50 #include <net/if.h> 51 #include <net/if_types.h> 52 #include <net/route.h> 53 54 #include <netinet/in.h> 55 #include <netinet/in_systm.h> 56 #include <netinet/ip.h> 57 #include <netinet/in_pcb.h> 58 #include <netinet/in_var.h> 59 #include <netinet/ip_var.h> 60 61 #ifdef INET6 62 #include <netinet/ip6.h> 63 #include <netinet6/ip6_var.h> 64 #include <netinet6/in6_pcb.h> 65 #include <netinet/icmp6.h> 66 #include <netinet6/nd6.h> 67 #include <netinet6/scope6_var.h> 68 #include <netinet6/nd6.h> 69 #endif /* INET6 */ 70 71 #include <netinet/in_pcb.h> 72 73 #include <netinet/sctp_var.h> 74 #include <netinet/sctp_pcb.h> 75 #include <netinet/sctp_header.h> 76 #include <netinet/sctputil.h> 77 #include <netinet/sctp_output.h> 78 #include <netinet/sctp_asconf.h> 79 80 /* 81 * debug flags: 82 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 83 * SCTP_DEBUG_ASCONF2: detailed info 84 */ 85 #ifdef SCTP_DEBUG 86 extern u_int32_t sctp_debug_on; 87 #endif /* SCTP_DEBUG */ 88 89 /* 90 * draft-ietf-tsvwg-addip-sctp 91 * 92 * Address management only currently supported 93 * For the bound all case: 94 * the asoc local addr list is always a "DO NOT USE" list 95 * For the subset bound case: 96 * If ASCONFs are allowed: 97 * the endpoint local addr list is the usable address list 98 * the asoc local addr list is the "DO NOT USE" list 99 * If ASCONFs are not allowed: 100 * the endpoint local addr list is the default usable list 101 * the asoc local addr list is the usable address list 102 * 103 * An ASCONF parameter queue exists per asoc which holds the pending 104 * address operations. Lists are updated upon receipt of ASCONF-ACK. 105 * 106 * Deleted addresses are always immediately removed from the lists as 107 * they will (shortly) no longer exist in the kernel. We send ASCONFs 108 * as a courtesy, only if allowed. 109 */ 110 111 /* 112 * ASCONF parameter processing 113 * response_required: set if a reply is required (eg. SUCCESS_REPORT) 114 * returns a mbuf to an "error" response parameter or NULL/"success" if ok 115 * FIX: allocating this many mbufs on the fly is pretty inefficient... 116 */ 117 118 static struct mbuf * 119 sctp_asconf_success_response(uint32_t id) 120 { 121 struct mbuf *m_reply = NULL; 122 struct sctp_asconf_paramhdr *aph; 123 124 MGET(m_reply, M_DONTWAIT, MT_DATA); 125 if (m_reply == NULL) { 126 #ifdef SCTP_DEBUG 127 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 128 printf("asconf_success_response: couldn't get mbuf!\n"); 129 } 130 #endif /* SCTP_DEBUG */ 131 return NULL; 132 } 133 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 134 aph->correlation_id = id; 135 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 136 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 137 m_reply->m_len = aph->ph.param_length; 138 aph->ph.param_length = htons(aph->ph.param_length); 139 140 return m_reply; 141 } 142 143 static struct mbuf * 144 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv, 145 uint16_t tlv_length) 146 { 147 struct mbuf *m_reply = NULL; 148 struct sctp_asconf_paramhdr *aph; 149 struct sctp_error_cause *error; 150 uint8_t *tlv; 151 152 MGET(m_reply, M_DONTWAIT, MT_DATA); 153 if (m_reply == NULL) { 154 #ifdef SCTP_DEBUG 155 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 156 printf("asconf_error_response: couldn't get mbuf!\n"); 157 } 158 #endif /* SCTP_DEBUG */ 159 return NULL; 160 } 161 aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 162 error = (struct sctp_error_cause *)(aph + 1); 163 164 aph->correlation_id = id; 165 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 166 error->code = htons(cause); 167 error->length = tlv_length + sizeof(struct sctp_error_cause); 168 aph->ph.param_length = error->length + 169 sizeof(struct sctp_asconf_paramhdr); 170 171 if (aph->ph.param_length > MLEN) { 172 #ifdef SCTP_DEBUG 173 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 174 printf("asconf_error_response: tlv_length (%xh) too big\n", 175 tlv_length); 176 } 177 #endif /* SCTP_DEBUG */ 178 sctp_m_freem(m_reply); /* discard */ 179 return NULL; 180 } 181 182 if (error_tlv != NULL) { 183 tlv = (uint8_t *)(error + 1); 184 memcpy(tlv, error_tlv, tlv_length); 185 } 186 187 m_reply->m_len = aph->ph.param_length; 188 error->length = htons(error->length); 189 aph->ph.param_length = htons(aph->ph.param_length); 190 191 return m_reply; 192 } 193 194 static struct mbuf * 195 sctp_process_asconf_add_ip(struct sctp_asconf_paramhdr *aph, 196 struct sctp_tcb *stcb, int response_required) 197 { 198 struct mbuf *m_reply = NULL; 199 struct sockaddr_storage sa_store; 200 struct sctp_ipv4addr_param *v4addr; 201 uint16_t param_type, param_length, aparam_length; 202 struct sockaddr *sa; 203 struct sockaddr_in *sin; 204 #ifdef INET6 205 struct sockaddr_in6 *sin6; 206 struct sctp_ipv6addr_param *v6addr; 207 #endif /* INET6 */ 208 209 aparam_length = ntohs(aph->ph.param_length); 210 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 211 #ifdef INET6 212 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 213 #endif /* INET6 */ 214 param_type = ntohs(v4addr->ph.param_type); 215 param_length = ntohs(v4addr->ph.param_length); 216 217 sa = (struct sockaddr *)&sa_store; 218 switch (param_type) { 219 case SCTP_IPV4_ADDRESS: 220 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 221 /* invalid param size */ 222 return NULL; 223 } 224 sin = (struct sockaddr_in *)&sa_store; 225 memset(sin, 0, sizeof(*sin)); 226 sin->sin_family = AF_INET; 227 sin->sin_len = sizeof(struct sockaddr_in); 228 sin->sin_port = stcb->rport; 229 sin->sin_addr.s_addr = v4addr->addr; 230 #ifdef SCTP_DEBUG 231 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 232 printf("process_asconf_add_ip: adding "); 233 sctp_print_address(sa); 234 } 235 #endif /* SCTP_DEBUG */ 236 break; 237 case SCTP_IPV6_ADDRESS: 238 #ifdef INET6 239 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 240 /* invalid param size */ 241 return NULL; 242 } 243 sin6 = (struct sockaddr_in6 *)&sa_store; 244 memset(sin6, 0, sizeof(*sin6)); 245 sin6->sin6_family = AF_INET6; 246 sin6->sin6_len = sizeof(struct sockaddr_in6); 247 sin6->sin6_port = stcb->rport; 248 memcpy((void *)&sin6->sin6_addr, v6addr->addr, 249 sizeof(struct in6_addr)); 250 #ifdef SCTP_DEBUG 251 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 252 printf("process_asconf_add_ip: adding "); 253 sctp_print_address(sa); 254 } 255 #endif /* SCTP_DEBUG */ 256 #else 257 /* IPv6 not enabled! */ 258 /* FIX ME: currently sends back an invalid param error */ 259 m_reply = sctp_asconf_error_response(aph->correlation_id, 260 SCTP_ERROR_INVALID_PARAM, (uint8_t *)aph, aparam_length); 261 #ifdef SCTP_DEBUG 262 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 263 printf("process_asconf_add_ip: v6 disabled- skipping "); 264 sctp_print_address(sa); 265 } 266 #endif /* SCTP_DEBUG */ 267 return m_reply; 268 #endif /* INET6 */ 269 break; 270 default: 271 m_reply = sctp_asconf_error_response(aph->correlation_id, 272 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 273 aparam_length); 274 return m_reply; 275 } /* end switch */ 276 277 /* add the address */ 278 if (sctp_add_remote_addr(stcb, sa, 0, 6) != 0) { 279 #ifdef SCTP_DEBUG 280 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 281 printf("process_asconf_add_ip: error adding address\n"); 282 } 283 #endif /* SCTP_DEBUG */ 284 m_reply = sctp_asconf_error_response(aph->correlation_id, 285 SCTP_ERROR_RESOURCE_SHORTAGE, (uint8_t *)aph, 286 aparam_length); 287 } else { 288 /* notify upper layer */ 289 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa); 290 if (response_required) { 291 m_reply = 292 sctp_asconf_success_response(aph->correlation_id); 293 } 294 } 295 296 return m_reply; 297 } 298 299 static struct mbuf * 300 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph, 301 struct sctp_tcb *stcb, int response_required) 302 { 303 struct mbuf *m_reply = NULL; 304 struct sockaddr_storage sa_store, sa_source; 305 struct sctp_ipv4addr_param *v4addr; 306 uint16_t param_type, param_length, aparam_length; 307 struct sockaddr *sa; 308 struct sockaddr_in *sin; 309 struct ip *iph; 310 int result; 311 #ifdef INET6 312 struct sockaddr_in6 *sin6; 313 struct sctp_ipv6addr_param *v6addr; 314 #endif /* INET6 */ 315 316 aparam_length = ntohs(aph->ph.param_length); 317 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 318 #ifdef INET6 319 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 320 #endif /* INET6 */ 321 param_type = ntohs(v4addr->ph.param_type); 322 param_length = ntohs(v4addr->ph.param_length); 323 324 /* get the source IP address for deletion check */ 325 iph = mtod(m, struct ip *); 326 if (iph->ip_v == IPVERSION) { 327 /* IPv4 source */ 328 sin = (struct sockaddr_in *)&sa_source; 329 memset(sin, 0, sizeof(*sin)); 330 sin->sin_family = AF_INET; 331 sin->sin_len = sizeof(struct sockaddr_in); 332 sin->sin_port = stcb->rport; 333 sin->sin_addr.s_addr = iph->ip_src.s_addr; 334 } 335 #ifdef INET6 336 else if (iph->ip_v == (IPV6_VERSION >> 4)) { 337 /* IPv6 source */ 338 struct ip6_hdr *ip6; 339 340 sin6 = (struct sockaddr_in6 *)&sa_source; 341 memset(sin6, 0, sizeof(*sin6)); 342 sin6->sin6_family = AF_INET6; 343 sin6->sin6_len = sizeof(struct sockaddr_in6); 344 sin6->sin6_port = stcb->rport; 345 ip6 = mtod(m, struct ip6_hdr *); 346 sin6->sin6_addr = ip6->ip6_src; 347 } 348 #endif /* INET6 */ 349 else 350 return NULL; 351 352 sa = (struct sockaddr *)&sa_store; 353 switch (param_type) { 354 case SCTP_IPV4_ADDRESS: 355 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 356 /* invalid param size */ 357 return NULL; 358 } 359 sin = (struct sockaddr_in *)&sa_store; 360 memset(sin, 0, sizeof(*sin)); 361 sin->sin_family = AF_INET; 362 sin->sin_len = sizeof(struct sockaddr_in); 363 sin->sin_port = stcb->rport; 364 sin->sin_addr.s_addr = v4addr->addr; 365 #ifdef SCTP_DEBUG 366 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 367 printf("process_asconf_delete_ip: deleting "); 368 sctp_print_address(sa); 369 } 370 #endif /* SCTP_DEBUG */ 371 break; 372 case SCTP_IPV6_ADDRESS: 373 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 374 /* invalid param size */ 375 return NULL; 376 } 377 #ifdef INET6 378 sin6 = (struct sockaddr_in6 *)&sa_store; 379 memset(sin6, 0, sizeof(*sin6)); 380 sin6->sin6_family = AF_INET6; 381 sin6->sin6_len = sizeof(struct sockaddr_in6); 382 sin6->sin6_port = stcb->rport; 383 memcpy(&sin6->sin6_addr, v6addr->addr, 384 sizeof(struct in6_addr)); 385 #ifdef SCTP_DEBUG 386 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 387 printf("process_asconf_delete_ip: deleting "); 388 sctp_print_address(sa); 389 } 390 #endif /* SCTP_DEBUG */ 391 #else 392 /* IPv6 not enabled! No "action" needed; just ack it */ 393 #ifdef SCTP_DEBUG 394 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 395 printf("process_asconf_delete_ip: v6 disabled- ignoring: "); 396 sctp_print_address(sa); 397 } 398 #endif /* SCTP_DEBUG */ 399 /* just respond with a "success" ASCONF-ACK */ 400 return NULL; 401 #endif /* INET6 */ 402 break; 403 default: 404 m_reply = sctp_asconf_error_response(aph->correlation_id, 405 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 406 aparam_length); 407 return m_reply; 408 } /* end switch */ 409 410 /* make sure the source address is not being deleted */ 411 if ((memcmp(sa, &sa_source, sizeof(struct sockaddr_in)) == 0) 412 #ifdef INET6 413 || (memcmp(sa, &sa_source, sizeof(struct sockaddr_in6)) == 0) 414 #endif /* INET6 */ 415 ) { 416 /* trying to delete the source address! */ 417 #ifdef SCTP_DEBUG 418 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 419 printf("process_asconf_delete_ip: tried to delete source addr\n"); 420 } 421 #endif /* SCTP_DEBUG */ 422 m_reply = sctp_asconf_error_response(aph->correlation_id, 423 SCTP_ERROR_DELETE_SOURCE_ADDR, (uint8_t *)aph, 424 aparam_length); 425 return m_reply; 426 } 427 428 /* delete the address */ 429 result = sctp_del_remote_addr(stcb, sa); 430 /* 431 * note if result == -2, the address doesn't exist in the asoc 432 * but since it's being deleted anyways, we just ack the delete 433 * -- but this probably means something has already gone awry 434 */ 435 if (result == -1) { 436 /* only one address in the asoc */ 437 #ifdef SCTP_DEBUG 438 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 439 printf("process_asconf_delete_ip: tried to delete last IP addr!\n"); 440 } 441 #endif /* SCTP_DEBUG */ 442 m_reply = sctp_asconf_error_response(aph->correlation_id, 443 SCTP_ERROR_DELETE_LAST_ADDR, (uint8_t *)aph, 444 aparam_length); 445 } else { 446 /* notify upper layer */ 447 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa); 448 } 449 450 if (response_required) { 451 m_reply = sctp_asconf_success_response(aph->correlation_id); 452 } 453 return m_reply; 454 } 455 456 static struct mbuf * 457 sctp_process_asconf_set_primary(struct sctp_asconf_paramhdr *aph, 458 struct sctp_tcb *stcb, int response_required) 459 { 460 struct mbuf *m_reply = NULL; 461 struct sockaddr_storage sa_store; 462 struct sctp_ipv4addr_param *v4addr; 463 uint16_t param_type, param_length, aparam_length; 464 struct sockaddr *sa; 465 struct sockaddr_in *sin; 466 #ifdef INET6 467 struct sockaddr_in6 *sin6; 468 struct sctp_ipv6addr_param *v6addr; 469 #endif /* INET6 */ 470 471 aparam_length = ntohs(aph->ph.param_length); 472 v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 473 #ifdef INET6 474 v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 475 #endif /* INET6 */ 476 param_type = ntohs(v4addr->ph.param_type); 477 param_length = ntohs(v4addr->ph.param_length); 478 479 sa = (struct sockaddr *)&sa_store; 480 switch (param_type) { 481 case SCTP_IPV4_ADDRESS: 482 if (param_length != sizeof(struct sctp_ipv4addr_param)) { 483 /* invalid param size */ 484 return NULL; 485 } 486 sin = (struct sockaddr_in *)&sa_store; 487 memset(sin, 0, sizeof(*sin)); 488 sin->sin_family = AF_INET; 489 sin->sin_len = sizeof(struct sockaddr_in); 490 sin->sin_addr.s_addr = v4addr->addr; 491 #ifdef SCTP_DEBUG 492 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 493 printf("process_asconf_set_primary: "); 494 sctp_print_address(sa); 495 } 496 #endif /* SCTP_DEBUG */ 497 break; 498 case SCTP_IPV6_ADDRESS: 499 if (param_length != sizeof(struct sctp_ipv6addr_param)) { 500 /* invalid param size */ 501 return NULL; 502 } 503 #ifdef INET6 504 sin6 = (struct sockaddr_in6 *)&sa_store; 505 memset(sin6, 0, sizeof(*sin6)); 506 sin6->sin6_family = AF_INET6; 507 sin6->sin6_len = sizeof(struct sockaddr_in6); 508 memcpy((void *)&sin6->sin6_addr, v6addr->addr, 509 sizeof(struct in6_addr)); 510 #ifdef SCTP_DEBUG 511 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 512 printf("process_asconf_set_primary: "); 513 sctp_print_address(sa); 514 } 515 #endif /* SCTP_DEBUG */ 516 #else 517 /* IPv6 not enabled! No "action" needed; just ack it */ 518 #ifdef SCTP_DEBUG 519 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 520 printf("process_asconf_set_primary: v6 disabled- ignoring: "); 521 sctp_print_address(sa); 522 } 523 #endif /* SCTP_DEBUG */ 524 /* just respond with a "success" ASCONF-ACK */ 525 return NULL; 526 #endif /* INET6 */ 527 break; 528 default: 529 m_reply = sctp_asconf_error_response(aph->correlation_id, 530 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 531 aparam_length); 532 return m_reply; 533 } /* end switch */ 534 535 /* set the primary address */ 536 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 537 #ifdef SCTP_DEBUG 538 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 539 printf("process_asconf_set_primary: primary address set\n"); 540 } 541 #endif /* SCTP_DEBUG */ 542 /* notify upper layer */ 543 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa); 544 545 if (response_required) { 546 m_reply = sctp_asconf_success_response(aph->correlation_id); 547 } 548 } else { 549 /* couldn't set the requested primary address! */ 550 #ifdef SCTP_DEBUG 551 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 552 printf("process_asconf_set_primary: set primary failed!\n"); 553 } 554 #endif /* SCTP_DEBUG */ 555 /* must have been an invalid address, so report */ 556 m_reply = sctp_asconf_error_response(aph->correlation_id, 557 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph, 558 aparam_length); 559 } 560 561 return m_reply; 562 } 563 564 /* 565 * handles an ASCONF chunk 566 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 567 */ 568 void 569 sctp_handle_asconf(struct mbuf *m, unsigned int offset, struct sctp_asconf_chunk *cp, 570 struct sctp_tcb *stcb, struct sctp_nets *net) 571 { 572 struct sctp_association *asoc; 573 uint32_t serial_num; 574 struct mbuf *m_ack, *m_result, *m_tail; 575 struct sctp_asconf_ack_chunk *ack_cp; 576 struct sctp_asconf_paramhdr *aph, *ack_aph; 577 struct sctp_ipv6addr_param *p_addr; 578 unsigned int asconf_limit; 579 int error = 0; /* did an error occur? */ 580 /* asconf param buffer */ 581 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER]; 582 583 /* verify minimum length */ 584 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 585 #ifdef SCTP_DEBUG 586 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 587 printf("handle_asconf: chunk too small = %xh\n", 588 ntohs(cp->ch.chunk_length)); 589 } 590 #endif /* SCTP_DEBUG */ 591 return; 592 } 593 594 asoc = &stcb->asoc; 595 serial_num = ntohl(cp->serial_number); 596 597 if (serial_num == asoc->asconf_seq_in) { 598 /* got a duplicate ASCONF */ 599 #ifdef SCTP_DEBUG 600 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 601 printf("handle_asconf: got duplicate serial number = %xh\n", 602 serial_num); 603 } 604 #endif /* SCTP_DEBUG */ 605 /* resend last ASCONF-ACK... */ 606 sctp_send_asconf_ack(stcb, 1); 607 return; 608 } else if (serial_num != (asoc->asconf_seq_in + 1)) { 609 #ifdef SCTP_DEBUG 610 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 611 printf("handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 612 serial_num, asoc->asconf_seq_in+1); 613 } 614 #endif /* SCTP_DEBUG */ 615 return; 616 } 617 618 /* it's the expected "next" sequence number, so process it */ 619 asoc->asconf_seq_in = serial_num; /* update sequence */ 620 /* get length of all the param's in the ASCONF */ 621 asconf_limit = offset + ntohs(cp->ch.chunk_length); 622 #ifdef SCTP_DEBUG 623 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 624 printf("handle_asconf: asconf_limit=%u, sequence=%xh\n", 625 asconf_limit, serial_num); 626 } 627 #endif /* SCTP_DEBUG */ 628 if (asoc->last_asconf_ack_sent != NULL) { 629 /* free last ASCONF-ACK message sent */ 630 sctp_m_freem(asoc->last_asconf_ack_sent); 631 asoc->last_asconf_ack_sent = NULL; 632 } 633 MGETHDR(m_ack, M_DONTWAIT, MT_DATA); 634 if (m_ack == NULL) { 635 #ifdef SCTP_DEBUG 636 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 637 printf("handle_asconf: couldn't get mbuf!\n"); 638 } 639 #endif /* SCTP_DEBUG */ 640 return; 641 } 642 m_tail = m_ack; /* current reply chain's tail */ 643 644 /* fill in ASCONF-ACK header */ 645 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 646 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 647 ack_cp->ch.chunk_flags = 0; 648 ack_cp->serial_number = htonl(serial_num); 649 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 650 m_ack->m_len = sizeof(struct sctp_asconf_ack_chunk); 651 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 652 m_ack->m_pkthdr.len = sizeof(struct sctp_asconf_ack_chunk); 653 654 /* skip the lookup address parameter */ 655 offset += sizeof(struct sctp_asconf_chunk); 656 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); 657 if (p_addr == NULL) { 658 #ifdef SCTP_DEBUG 659 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 660 printf("handle_asconf: couldn't get lookup addr!\n"); 661 } 662 #endif /* SCTP_DEBUG */ 663 664 /* respond with a missing/invalid mandatory parameter error */ 665 return; 666 } 667 /* param_length is already validated in process_control... */ 668 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 669 670 /* get pointer to first asconf param in ASCONF */ 671 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); 672 /* get pointer to first asconf param in ASCONF-ACK */ 673 if (aph == NULL) { 674 printf("Gak in asconf\n"); 675 return; 676 } 677 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, vaddr_t) + sizeof(struct sctp_asconf_ack_chunk)); 678 if (ack_aph == NULL) { 679 printf("Gak in asconf2\n"); 680 return; 681 } 682 683 /* process through all parameters */ 684 while (aph != NULL) { 685 unsigned int param_length, param_type; 686 687 param_type = ntohs(aph->ph.param_type); 688 param_length = ntohs(aph->ph.param_length); 689 if (offset + param_length > asconf_limit) { 690 /* parameter goes beyond end of chunk! */ 691 sctp_m_freem(m_ack); 692 return; 693 } 694 m_result = NULL; 695 696 if (param_length > sizeof(aparam_buf)) { 697 #ifdef SCTP_DEBUG 698 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 699 printf("handle_asconf: param length (%u) larger than buffer size!\n", param_length); 700 } 701 #endif /* SCTP_DEBUG */ 702 sctp_m_freem(m_ack); 703 return; 704 } 705 if (param_length <= sizeof(struct sctp_paramhdr)) { 706 #ifdef SCTP_DEBUG 707 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 708 printf("handle_asconf: param length (%u) too short\n", param_length); 709 } 710 #endif /* SCTP_DEBUG */ 711 sctp_m_freem(m_ack); 712 } 713 714 /* get the entire parameter */ 715 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 716 if (aph == NULL) { 717 printf("Gag\n"); 718 sctp_m_freem(m_ack); 719 return; 720 } 721 switch (param_type) { 722 case SCTP_ADD_IP_ADDRESS: 723 asoc->peer_supports_asconf = 1; 724 m_result = sctp_process_asconf_add_ip(aph, stcb, error); 725 break; 726 case SCTP_DEL_IP_ADDRESS: 727 asoc->peer_supports_asconf = 1; 728 m_result = sctp_process_asconf_delete_ip(m, aph, stcb, 729 error); 730 break; 731 case SCTP_ERROR_CAUSE_IND: 732 /* not valid in an ASCONF chunk */ 733 break; 734 case SCTP_SET_PRIM_ADDR: 735 asoc->peer_supports_asconf_setprim = 1; 736 m_result = sctp_process_asconf_set_primary(aph, stcb, 737 error); 738 break; 739 case SCTP_SUCCESS_REPORT: 740 /* not valid in an ASCONF chunk */ 741 break; 742 case SCTP_ULP_ADAPTION: 743 /* FIX */ 744 break; 745 default: 746 if ((param_type & 0x8000) == 0) { 747 /* Been told to STOP at this param */ 748 asconf_limit = offset; 749 /* FIX FIX - We need to call sctp_arethere_unrecognized_parameters() 750 * to get a operr and send it for any param's with the 751 * 0x4000 bit set OR do it here ourselves... note we still 752 * must STOP if the 0x8000 bit is clear. 753 */ 754 } 755 /* unknown/invalid param type */ 756 break; 757 } /* switch */ 758 759 /* add any (error) result to the reply mbuf chain */ 760 if (m_result != NULL) { 761 #ifdef SCTP_DEBUG 762 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 763 printf("handle_asconf: adding reply...\n"); 764 } 765 #endif /* SCTP_DEBUG */ 766 m_tail->m_next = m_result; 767 m_tail = m_result; 768 /* update lengths, make sure it's aligned too */ 769 m_result->m_len = SCTP_SIZE32(m_result->m_len); 770 m_ack->m_pkthdr.len += m_result->m_len; 771 ack_cp->ch.chunk_length += m_result->m_len; 772 /* set flag to force success reports */ 773 error = 1; 774 } 775 776 offset += SCTP_SIZE32(param_length); 777 /* update remaining ASCONF message length to process */ 778 if (offset >= asconf_limit) { 779 /* no more data in the mbuf chain */ 780 break; 781 } 782 /* get pointer to next asconf param */ 783 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 784 sizeof(struct sctp_asconf_paramhdr), 785 (uint8_t *)&aparam_buf); 786 if (aph == NULL) { 787 /* can't get an asconf paramhdr */ 788 #ifdef SCTP_DEBUG 789 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 790 printf("handle_asconf: can't get asconf param hdr!\n"); 791 } 792 #endif /* SCTP_DEBUG */ 793 /* FIX ME - add error here... */ 794 } 795 } /* while */ 796 797 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 798 /* save the ASCONF-ACK reply */ 799 asoc->last_asconf_ack_sent = m_ack; 800 /* and send (a new one) it out... */ 801 sctp_send_asconf_ack(stcb, 0); 802 } 803 804 /* 805 * does the address match? 806 * returns 0 if not, 1 if so 807 */ 808 static uint32_t 809 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 810 { 811 #ifdef INET6 812 if (sa->sa_family == AF_INET6) { 813 /* IPv6 sa address */ 814 /* XXX scopeid */ 815 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 816 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 817 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 818 sizeof(struct in6_addr)) == 0)) { 819 return (1); 820 } 821 } else 822 #endif /* INET6 */ 823 if (sa->sa_family == AF_INET) { 824 /* IPv4 sa address */ 825 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 826 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 827 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 828 sizeof(struct in_addr)) == 0)) { 829 return (1); 830 } 831 } 832 return (0); 833 } 834 835 /* 836 * Cleanup for non-responded/OP ERR'd ASCONF 837 */ 838 void 839 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 840 { 841 #ifdef SCTP_DEBUG 842 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 843 printf("asconf_cleanup: marking peer ASCONF incapable and cleaning up\n"); 844 } 845 #endif /* SCTP_DEBUG */ 846 /* mark peer as ASCONF incapable */ 847 stcb->asoc.peer_supports_asconf = 0; 848 stcb->asoc.peer_supports_asconf_setprim = 0; 849 /* 850 * clear out any existing asconfs going out 851 */ 852 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net); 853 stcb->asoc.asconf_seq_out++; 854 /* remove the old ASCONF on our outbound queue */ 855 sctp_toss_old_asconf(stcb); 856 } 857 858 /* 859 * process an ADD/DELETE IP ack from peer 860 * ifa: corresponding ifaddr to the address being added/deleted 861 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS 862 * flag: 1=success, 0=failure 863 */ 864 static void 865 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct ifaddr *addr, 866 uint16_t type, uint32_t flag) 867 { 868 869 /* 870 * do the necessary asoc list work- 871 * if we get a failure indication, leave the address on the 872 * "do not use" asoc list 873 * if we get a success indication, remove the address from 874 * the list 875 */ 876 /* 877 * Note: this will only occur for ADD_IP_ADDRESS, since 878 * DEL_IP_ADDRESS is never actually added to the list... 879 */ 880 if (flag) { 881 /* success case, so remove from the list */ 882 sctp_del_local_addr_assoc(stcb, addr); 883 } 884 /* else, leave it on the list */ 885 } 886 887 /* 888 * add an asconf add/delete IP address parameter to the queue 889 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR 890 * returns 0 if completed, non-zero if not completed 891 * NOTE: if adding, but delete already scheduled (and not yet 892 * sent out), simply remove from queue. Same for deleting 893 * an address already scheduled for add. If a duplicate 894 * operation is found, ignore the new one. 895 */ 896 static uint32_t 897 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct ifaddr *ifa, uint16_t type) 898 { 899 struct sctp_asconf_addr *aa, *aa_next; 900 #ifdef SCTP_DEBUG 901 char buf[128]; /* for address in string format */ 902 #endif /* SCTP_DEBUG */ 903 904 /* see if peer supports ASCONF */ 905 if (stcb->asoc.peer_supports_asconf == 0) { 906 #ifdef SCTP_DEBUG 907 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 908 printf("asconf_queue_add: peer doesn't support ASCONF\n"); 909 } 910 #endif /* SCTP_DEBUG */ 911 return (-1); 912 } 913 914 /* make sure the request isn't already in the queue */ 915 for (aa=TAILQ_FIRST(&stcb->asoc.asconf_queue); aa!=NULL; aa=aa_next) { 916 aa_next = TAILQ_NEXT(aa, next); 917 /* address match? */ 918 if (sctp_asconf_addr_match(aa, ifa->ifa_addr) == 0) 919 continue; 920 /* is the request already in queue (sent or not) */ 921 if (aa->ap.aph.ph.param_type == type) { 922 #ifdef SCTP_DEBUG 923 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 924 printf("asconf_queue_add: request already exists\n"); 925 } 926 #endif /* SCTP_DEBUG */ 927 return (-1); 928 } 929 /* is the negative request already in queue, and not sent */ 930 if (aa->sent == 0 && 931 /* add requested, delete already queued */ 932 ((type == SCTP_ADD_IP_ADDRESS && 933 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) || 934 /* delete requested, add already queued */ 935 (type == SCTP_DEL_IP_ADDRESS && 936 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS))) { 937 /* delete the existing entry in the queue */ 938 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 939 /* take the entry off the appropriate list */ 940 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1); 941 /* free the entry */ 942 free(aa, M_PCB); 943 944 #ifdef SCTP_DEBUG 945 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 946 printf("asconf_queue_add: removing 'opposite' queued request\n"); 947 } 948 #endif /* SCTP_DEBUG */ 949 return (-1); 950 } 951 } /* for each aa */ 952 953 /* adding new request to the queue */ 954 aa = malloc(sizeof(*aa), M_PCB, M_NOWAIT); 955 if (aa == NULL) { 956 /* didn't get memory */ 957 #ifdef SCTP_DEBUG 958 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 959 printf("asconf_queue_add: failed to get memory!\n"); 960 } 961 #endif /* SCTP_DEBUG */ 962 return (-1); 963 } 964 /* fill in asconf address parameter fields */ 965 /* top level elements are "networked" during send */ 966 aa->ap.aph.ph.param_type = type; 967 aa->ifa = ifa; 968 /* correlation_id filled in during send routine later... */ 969 if (ifa->ifa_addr->sa_family == AF_INET6) { 970 /* IPv6 address */ 971 #ifdef SCTP_DEBUG 972 char ip6buf[INET6_ADDRSTRLEN]; 973 #endif 974 struct sockaddr_in6 *sin6; 975 976 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 977 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 978 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 979 aa->ap.aph.ph.param_length = 980 sizeof(struct sctp_asconf_paramhdr) + 981 sizeof(struct sctp_ipv6addr_param); 982 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 983 sizeof(struct in6_addr)); 984 #ifdef SCTP_DEBUG 985 strlcpy(buf, IN6_PRINT(ip6buf, &sin6->sin6_addr), sizeof(buf)); 986 #endif /* SCTP_DEBUG */ 987 988 } else if (ifa->ifa_addr->sa_family == AF_INET) { 989 /* IPv4 address */ 990 struct sockaddr_in *sin = (struct sockaddr_in *)ifa->ifa_addr; 991 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 992 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 993 aa->ap.aph.ph.param_length = 994 sizeof(struct sctp_asconf_paramhdr) + 995 sizeof(struct sctp_ipv4addr_param); 996 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 997 sizeof(struct in_addr)); 998 #ifdef SCTP_DEBUG 999 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf)); 1000 #endif /* SCTP_DEBUG */ 1001 } else { 1002 /* invalid family! */ 1003 return (-1); 1004 } 1005 aa->sent = 0; /* clear sent flag */ 1006 1007 /* 1008 * if we are deleting an address it should go out last 1009 * otherwise, add it to front of the pending queue 1010 */ 1011 if (type == SCTP_ADD_IP_ADDRESS) { 1012 /* add goes to the front of the queue */ 1013 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next); 1014 #ifdef SCTP_DEBUG 1015 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1016 printf("asconf_queue_add: appended asconf ADD_IP_ADDRESS: %s\n", buf); 1017 } 1018 #endif /* SCTP_DEBUG */ 1019 } else { 1020 /* delete and set primary goes to the back of the queue */ 1021 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1022 #ifdef SCTP_DEBUG 1023 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1024 if (type == SCTP_DEL_IP_ADDRESS) { 1025 printf("asconf_queue_add: inserted asconf DEL_IP_ADDRESS: %s\n", buf); 1026 } else { 1027 printf("asconf_queue_add: inserted asconf SET_PRIM_ADDR: %s\n", buf); 1028 } 1029 } 1030 #endif /* SCTP_DEBUG */ 1031 } 1032 1033 return (0); 1034 } 1035 1036 /* 1037 * add an asconf add/delete IP address parameter to the queue by addr 1038 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR 1039 * returns 0 if completed, non-zero if not completed 1040 * NOTE: if adding, but delete already scheduled (and not yet 1041 * sent out), simply remove from queue. Same for deleting 1042 * an address already scheduled for add. If a duplicate 1043 * operation is found, ignore the new one. 1044 */ 1045 static uint32_t 1046 sctp_asconf_queue_add_sa(struct sctp_tcb *stcb, struct sockaddr *sa, 1047 uint16_t type) 1048 { 1049 struct sctp_asconf_addr *aa, *aa_next; 1050 1051 /* see if peer supports ASCONF */ 1052 if (stcb->asoc.peer_supports_asconf == 0) { 1053 #ifdef SCTP_DEBUG 1054 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1055 printf("asconf_queue_add_sa: peer doesn't support ASCONF\n"); 1056 } 1057 #endif /* SCTP_DEBUG */ 1058 return (-1); 1059 } 1060 1061 /* make sure the request isn't already in the queue */ 1062 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1063 aa = aa_next) { 1064 aa_next = TAILQ_NEXT(aa, next); 1065 /* address match? */ 1066 if (sctp_asconf_addr_match(aa, sa) == 0) 1067 continue; 1068 /* is the request already in queue (sent or not) */ 1069 if (aa->ap.aph.ph.param_type == type) { 1070 #ifdef SCTP_DEBUG 1071 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1072 printf("asconf_queue_add_sa: request already exists\n"); 1073 } 1074 #endif /* SCTP_DEBUG */ 1075 return (-1); 1076 } 1077 1078 /* is the negative request already in queue, and not sent */ 1079 if (aa->sent == 1) 1080 continue; 1081 if (type == SCTP_ADD_IP_ADDRESS && 1082 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1083 /* add requested, delete already queued */ 1084 1085 /* delete the existing entry in the queue */ 1086 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1087 /* free the entry */ 1088 free(aa, M_PCB); 1089 #ifdef SCTP_DEBUG 1090 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1091 printf("asconf_queue_add_sa: removing queued delete request\n"); 1092 } 1093 #endif /* SCTP_DEBUG */ 1094 return (-1); 1095 } else if (type == SCTP_DEL_IP_ADDRESS && 1096 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1097 /* delete requested, add already queued */ 1098 1099 /* delete the existing entry in the queue */ 1100 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1101 /* take the entry off the appropriate list */ 1102 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1); 1103 /* free the entry */ 1104 free(aa, M_PCB); 1105 #ifdef SCTP_DEBUG 1106 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1107 printf("asconf_queue_add_sa: removing queued add request\n"); 1108 } 1109 #endif /* SCTP_DEBUG */ 1110 return (-1); 1111 } 1112 } /* for each aa */ 1113 1114 /* adding new request to the queue */ 1115 aa = malloc(sizeof(*aa), M_PCB, M_NOWAIT); 1116 if (aa == NULL) { 1117 /* didn't get memory */ 1118 #ifdef SCTP_DEBUG 1119 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1120 printf("asconf_queue_add_sa: failed to get memory!\n"); 1121 } 1122 #endif /* SCTP_DEBUG */ 1123 return (-1); 1124 } 1125 /* fill in asconf address parameter fields */ 1126 /* top level elements are "networked" during send */ 1127 aa->ap.aph.ph.param_type = type; 1128 aa->ifa = sctp_find_ifa_by_addr(sa); 1129 /* correlation_id filled in during send routine later... */ 1130 if (sa->sa_family == AF_INET6) { 1131 /* IPv6 address */ 1132 struct sockaddr_in6 *sin6; 1133 1134 sin6 = (struct sockaddr_in6 *)sa; 1135 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1136 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1137 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1138 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1139 sizeof(struct in6_addr)); 1140 } else if (sa->sa_family == AF_INET) { 1141 /* IPv4 address */ 1142 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1143 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1144 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1145 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1146 memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1147 sizeof(struct in_addr)); 1148 } else { 1149 /* invalid family! */ 1150 return (-1); 1151 } 1152 aa->sent = 0; /* clear sent flag */ 1153 1154 /* 1155 * if we are deleting an address it should go out last 1156 * otherwise, add it to front of the pending queue 1157 */ 1158 if (type == SCTP_ADD_IP_ADDRESS) { 1159 /* add goes to the front of the queue */ 1160 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next); 1161 #ifdef SCTP_DEBUG 1162 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1163 printf("asconf_queue_add_sa: appended asconf ADD_IP_ADDRESS\n"); 1164 } 1165 #endif /* SCTP_DEBUG */ 1166 } else { 1167 /* delete and set primary goes to the back of the queue */ 1168 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1169 #ifdef SCTP_DEBUG 1170 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1171 if (type == SCTP_DEL_IP_ADDRESS) { 1172 printf("asconf_queue_add_sa: inserted asconf DEL_IP_ADDRESS\n"); 1173 } else { 1174 printf("asconf_queue_add_sa: inserted asconf SET_PRIM_ADDR\n"); 1175 } 1176 } 1177 #endif /* SCTP_DEBUG */ 1178 } 1179 1180 return (0); 1181 } 1182 1183 /* 1184 * find a specific asconf param on our "sent" queue 1185 */ 1186 static struct sctp_asconf_addr * 1187 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1188 { 1189 struct sctp_asconf_addr *aa; 1190 1191 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1192 if (aa->ap.aph.correlation_id == correlation_id && 1193 aa->sent == 1) { 1194 /* found it */ 1195 return (aa); 1196 } 1197 } 1198 /* didn't find it */ 1199 return (NULL); 1200 } 1201 1202 /* 1203 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter 1204 * and do notifications based on the error response 1205 */ 1206 static void 1207 sctp_asconf_process_error(struct sctp_tcb *stcb, 1208 struct sctp_asconf_paramhdr *aph) 1209 { 1210 struct sctp_error_cause *eh; 1211 struct sctp_paramhdr *ph; 1212 uint16_t param_type; 1213 uint16_t error_code; 1214 1215 eh = (struct sctp_error_cause *)(aph + 1); 1216 ph = (struct sctp_paramhdr *)(eh + 1); 1217 /* validate lengths */ 1218 if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1219 htons(aph->ph.param_length)) { 1220 /* invalid error cause length */ 1221 #ifdef SCTP_DEBUG 1222 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1223 printf("asconf_process_error: cause element too long\n"); 1224 } 1225 #endif /* SCTP_DEBUG */ 1226 return; 1227 } 1228 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1229 htons(eh->length)) { 1230 /* invalid included TLV length */ 1231 #ifdef SCTP_DEBUG 1232 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1233 printf("asconf_process_error: included TLV too long\n"); 1234 } 1235 #endif /* SCTP_DEBUG */ 1236 return; 1237 } 1238 1239 /* which error code ? */ 1240 error_code = ntohs(eh->code); 1241 param_type = ntohs(aph->ph.param_type); 1242 /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1243 switch (error_code) { 1244 case SCTP_ERROR_RESOURCE_SHORTAGE: 1245 /* we allow ourselves to "try again" for this error */ 1246 break; 1247 default: 1248 /* peer can't handle it... */ 1249 switch (param_type) { 1250 case SCTP_ADD_IP_ADDRESS: 1251 case SCTP_DEL_IP_ADDRESS: 1252 stcb->asoc.peer_supports_asconf = 0; 1253 break; 1254 case SCTP_SET_PRIM_ADDR: 1255 stcb->asoc.peer_supports_asconf_setprim = 0; 1256 break; 1257 default: 1258 break; 1259 } 1260 } 1261 } 1262 1263 /* 1264 * process an asconf queue param 1265 * aparam: parameter to process, will be removed from the queue 1266 * flag: 1=success, 0=failure 1267 */ 1268 static void 1269 sctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1270 struct sctp_asconf_addr *aparam, uint32_t flag) 1271 { 1272 uint16_t param_type; 1273 1274 /* process this param */ 1275 param_type = aparam->ap.aph.ph.param_type; 1276 #ifdef SCTP_DEBUG 1277 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1278 printf("process_param_ack: handling asconf parameter type=%xh\n", param_type); 1279 } 1280 #endif /* SCTP_DEBUG */ 1281 switch (param_type) { 1282 case SCTP_ADD_IP_ADDRESS: 1283 #ifdef SCTP_DEBUG 1284 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1285 printf("process_param_ack: added IP address\n"); 1286 } 1287 #endif /* SCTP_DEBUG */ 1288 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag); 1289 break; 1290 case SCTP_DEL_IP_ADDRESS: 1291 #ifdef SCTP_DEBUG 1292 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1293 printf("process_param_ack: deleted IP address\n"); 1294 } 1295 #endif /* SCTP_DEBUG */ 1296 /* nothing really to do... lists already updated */ 1297 break; 1298 case SCTP_SET_PRIM_ADDR: 1299 /* nothing to do... peer may start using this addr */ 1300 if (flag == 0) 1301 stcb->asoc.peer_supports_asconf_setprim = 0; 1302 break; 1303 default: 1304 /* should NEVER happen */ 1305 break; 1306 } /* switch */ 1307 1308 /* remove the param and free it */ 1309 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1310 free(aparam, M_PCB); 1311 } 1312 1313 /* 1314 * cleanup from a bad asconf ack parameter 1315 */ 1316 static void 1317 sctp_asconf_ack_clear(struct sctp_tcb *stcb) 1318 { 1319 /* assume peer doesn't really know how to do asconfs */ 1320 stcb->asoc.peer_supports_asconf = 0; 1321 stcb->asoc.peer_supports_asconf_setprim = 0; 1322 /* XXX we could free the pending queue here */ 1323 } 1324 1325 void 1326 sctp_handle_asconf_ack(struct mbuf *m, int offset, 1327 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1328 struct sctp_nets *net) 1329 { 1330 struct sctp_association *asoc; 1331 uint32_t serial_num; 1332 uint16_t ack_length; 1333 struct sctp_asconf_paramhdr *aph; 1334 struct sctp_asconf_addr *aa, *aa_next; 1335 uint32_t last_error_id = 0; /* last error correlation id */ 1336 uint32_t id; 1337 struct sctp_asconf_addr *ap; 1338 /* asconf param buffer */ 1339 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER]; 1340 1341 /* verify minimum length */ 1342 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1343 #ifdef SCTP_DEBUG 1344 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1345 printf("handle_asconf_ack: chunk too small = %xh\n", 1346 ntohs(cp->ch.chunk_length)); 1347 } 1348 #endif /* SCTP_DEBUG */ 1349 return; 1350 } 1351 1352 asoc = &stcb->asoc; 1353 serial_num = ntohl(cp->serial_number); 1354 1355 /* 1356 * NOTE: we may want to handle this differently- currently, we 1357 * will abort when we get an ack for the expected serial number + 1 1358 * (eg. we didn't send it), process an ack normally if it is the 1359 * expected serial number, and re-send the previous ack for *ALL* 1360 * other serial numbers 1361 */ 1362 1363 /* 1364 * if the serial number is the next expected, but I didn't send it, 1365 * abort the asoc, since someone probably just hijacked us... 1366 */ 1367 if (serial_num == (asoc->asconf_seq_out + 1)) { 1368 sctp_abort_an_association(stcb->sctp_ep, stcb, 1369 SCTP_ERROR_ILLEGAL_ASCONF_ACK, NULL); 1370 #ifdef SCTP_DEBUG 1371 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1372 printf("handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1373 } 1374 #endif /* SCTP_DEBUG */ 1375 return; 1376 } 1377 1378 if (serial_num != asoc->asconf_seq_out) { 1379 /* got a duplicate/unexpected ASCONF-ACK */ 1380 #ifdef SCTP_DEBUG 1381 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1382 printf("handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", serial_num, asoc->asconf_seq_out); 1383 } 1384 #endif /* SCTP_DEBUG */ 1385 return; 1386 } 1387 /* stop our timer */ 1388 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net); 1389 1390 /* process the ASCONF-ACK contents */ 1391 ack_length = ntohs(cp->ch.chunk_length) - 1392 sizeof(struct sctp_asconf_ack_chunk); 1393 offset += sizeof(struct sctp_asconf_ack_chunk); 1394 /* process through all parameters */ 1395 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1396 unsigned int param_length, param_type; 1397 1398 /* get pointer to next asconf parameter */ 1399 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1400 sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1401 if (aph == NULL) { 1402 /* can't get an asconf paramhdr */ 1403 sctp_asconf_ack_clear(stcb); 1404 return; 1405 } 1406 param_type = ntohs(aph->ph.param_type); 1407 param_length = ntohs(aph->ph.param_length); 1408 if (param_length > ack_length) { 1409 sctp_asconf_ack_clear(stcb); 1410 return; 1411 } 1412 if (param_length < sizeof(struct sctp_paramhdr)) { 1413 sctp_asconf_ack_clear(stcb); 1414 return; 1415 } 1416 1417 /* get the complete parameter... */ 1418 if (param_length > sizeof(aparam_buf)) { 1419 #ifdef SCTP_DEBUG 1420 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1421 printf("param length (%u) larger than buffer size!\n", param_length); 1422 } 1423 #endif /* SCTP_DEBUG */ 1424 sctp_asconf_ack_clear(stcb); 1425 return; 1426 } 1427 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1428 if (aph == NULL) { 1429 sctp_asconf_ack_clear(stcb); 1430 return; 1431 } 1432 /* correlation_id is transparent to peer, no ntohl needed */ 1433 id = aph->correlation_id; 1434 1435 switch (param_type) { 1436 case SCTP_ERROR_CAUSE_IND: 1437 last_error_id = id; 1438 /* find the corresponding asconf param in our queue */ 1439 ap = sctp_asconf_find_param(stcb, id); 1440 if (ap == NULL) { 1441 /* hmm... can't find this in our queue! */ 1442 break; 1443 } 1444 /* process the parameter, failed flag */ 1445 sctp_asconf_process_param_ack(stcb, ap, 0); 1446 /* process the error response */ 1447 sctp_asconf_process_error(stcb, aph); 1448 break; 1449 case SCTP_SUCCESS_REPORT: 1450 /* find the corresponding asconf param in our queue */ 1451 ap = sctp_asconf_find_param(stcb, id); 1452 if (ap == NULL) { 1453 /* hmm... can't find this in our queue! */ 1454 break; 1455 } 1456 /* process the parameter, success flag */ 1457 sctp_asconf_process_param_ack(stcb, ap, 1); 1458 break; 1459 default: 1460 break; 1461 } /* switch */ 1462 1463 /* update remaining ASCONF-ACK message length to process */ 1464 ack_length -= SCTP_SIZE32(param_length); 1465 if (ack_length <= 0) { 1466 /* no more data in the mbuf chain */ 1467 break; 1468 } 1469 offset += SCTP_SIZE32(param_length); 1470 } /* while */ 1471 1472 /* 1473 * if there are any "sent" params still on the queue, these are 1474 * implicitly "success", or "failed" (if we got an error back) 1475 * ... so process these appropriately 1476 * 1477 * we assume that the correlation_id's are monotonically increasing 1478 * beginning from 1 and that we don't have *that* many outstanding 1479 * at any given time 1480 */ 1481 if (last_error_id == 0) 1482 last_error_id--; /* set to "max" value */ 1483 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1484 aa = aa_next) { 1485 aa_next = TAILQ_NEXT(aa, next); 1486 if (aa->sent == 1) { 1487 /* 1488 * implicitly successful or failed 1489 * if correlation_id < last_error_id, then success 1490 * else, failure 1491 */ 1492 if (aa->ap.aph.correlation_id < last_error_id) 1493 sctp_asconf_process_param_ack(stcb, aa, 1494 SCTP_SUCCESS_REPORT); 1495 else 1496 sctp_asconf_process_param_ack(stcb, aa, 1497 SCTP_ERROR_CAUSE_IND); 1498 } else { 1499 /* 1500 * since we always process in order (FIFO queue) 1501 * if we reach one that hasn't been sent, the 1502 * rest should not have been sent either. 1503 * so, we're done... 1504 */ 1505 break; 1506 } 1507 } 1508 1509 /* update the next sequence number to use */ 1510 asoc->asconf_seq_out++; 1511 /* remove the old ASCONF on our outbound queue */ 1512 sctp_toss_old_asconf(stcb); 1513 /* clear the sent flag to allow new ASCONFs */ 1514 asoc->asconf_sent = 0; 1515 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1516 /* we have more params, so restart our timer */ 1517 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1518 stcb, net); 1519 } 1520 } 1521 1522 /* is this an interface that we care about at all? */ 1523 static uint32_t 1524 sctp_is_desired_interface_type(struct ifaddr *ifa) 1525 { 1526 int result; 1527 1528 /* check the interface type to see if it's one we care about */ 1529 switch (ifa->ifa_ifp->if_type) { 1530 case IFT_ETHER: 1531 case IFT_ISO88023: 1532 case IFT_ISO88025: 1533 case IFT_STARLAN: 1534 case IFT_P10: 1535 case IFT_P80: 1536 case IFT_HY: 1537 case IFT_FDDI: 1538 case IFT_PPP: 1539 case IFT_XETHER: 1540 case IFT_SLIP: 1541 case IFT_GIF: 1542 result = 1; 1543 break; 1544 default: 1545 #ifdef SCTP_DEBUG 1546 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1547 printf("ignoring interface type = %u\n", 1548 ifa->ifa_ifp->if_type); 1549 } 1550 #endif /* SCTP_DEBUG */ 1551 result = 0; 1552 } /* end switch */ 1553 1554 return (result); 1555 } 1556 1557 static uint32_t 1558 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1559 { 1560 struct sockaddr_in6 *sin6; 1561 const struct sockaddr_in6 *net6; 1562 struct sctp_nets *net; 1563 1564 if (sa->sa_family != AF_INET6) { 1565 /* wrong family */ 1566 return (0); 1567 } 1568 1569 sin6 = (struct sockaddr_in6 *)sa; 1570 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1571 /* not link local address */ 1572 return (0); 1573 } 1574 /* hunt through our destination nets list for this scope_id */ 1575 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1576 if ((rtcache_getdst(&net->ro))->sa_family != 1577 AF_INET6) 1578 continue; 1579 net6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro); 1580 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1581 continue; 1582 if (sctp_is_same_scope(sin6, net6)) { 1583 /* found one */ 1584 return (1); 1585 } 1586 } 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 #ifdef SCTP_DEBUG 1671 char ip6buf[INET6_ADDRSTRLEN]; 1672 #endif /* SCTP_DEBUG */ 1673 struct sockaddr_in6 *sin6; 1674 1675 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1676 #ifdef SCTP_DEBUG 1677 strlcpy(buf, IN6_PRINT(ip6buf, &sin6->sin6_addr), sizeof(buf)); 1678 #endif /* SCTP_DEBUG */ 1679 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1680 /* we skip unspecifed addresses */ 1681 #ifdef SCTP_DEBUG 1682 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1683 printf("addr_mgmt_assoc: unspecified IPv6 addr\n"); 1684 } 1685 #endif /* SCTP_DEBUG */ 1686 return; 1687 } 1688 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1689 if (stcb->asoc.local_scope == 0) { 1690 #ifdef SCTP_DEBUG 1691 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1692 printf("addr_mgmt_assoc: skipping link local IPv6 addr: %s\n", buf); 1693 } 1694 #endif /* SCTP_DEBUG */ 1695 return; 1696 } 1697 /* is it the right link local scope? */ 1698 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) { 1699 #ifdef SCTP_DEBUG 1700 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1701 printf("addr_mgmt_assoc: skipping link local IPv6 addr: %s, wrong scope_id\n", buf); 1702 } 1703 #endif /* SCTP_DEBUG */ 1704 return; 1705 } 1706 } 1707 if (stcb->asoc.site_scope == 0 && 1708 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1709 #ifdef SCTP_DEBUG 1710 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1711 printf("addr_mgmt_assoc: skipping site local IPv6 addr: %s\n", buf); 1712 } 1713 #endif /* SCTP_DEBUG */ 1714 return; 1715 } 1716 } else if (ifa->ifa_addr->sa_family == AF_INET) { 1717 struct sockaddr_in *sin; 1718 struct in6pcb *inp6; 1719 1720 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1721 /* invalid if we are a v6 only endpoint */ 1722 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1723 (inp6->in6p_flags & IN6P_IPV6_V6ONLY) 1724 ) 1725 return; 1726 1727 sin = (struct sockaddr_in *)ifa->ifa_addr; 1728 #ifdef SCTP_DEBUG 1729 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf)); 1730 #endif /* SCTP_DEBUG */ 1731 if (sin->sin_addr.s_addr == 0) { 1732 /* we skip unspecifed addresses */ 1733 #ifdef SCTP_DEBUG 1734 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1735 printf("addr_mgmt_assoc: unspecified IPv4 addr\n"); 1736 } 1737 #endif /* SCTP_DEBUG */ 1738 return; 1739 } 1740 if (stcb->asoc.ipv4_local_scope == 0 && 1741 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1742 #ifdef SCTP_DEBUG 1743 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1744 printf("addr_mgmt_assoc: skipping private IPv4 addr: %s\n", buf); 1745 } 1746 #endif /* SCTP_DEBUG */ 1747 return; 1748 } 1749 } else { 1750 /* else, not AF_INET or AF_INET6, so skip */ 1751 #ifdef SCTP_DEBUG 1752 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1753 printf("addr_mgmt_assoc: not AF_INET or AF_INET6\n"); 1754 } 1755 #endif /* SCTP_DEBUG */ 1756 return; 1757 } 1758 1759 /* queue an asconf for this address add/delete */ 1760 if (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) { 1761 /* does the peer do asconf? */ 1762 if (stcb->asoc.peer_supports_asconf) { 1763 /* queue an asconf for this addr */ 1764 status = sctp_asconf_queue_add(stcb, ifa, type); 1765 /* 1766 * if queued ok, and in correct state, set the 1767 * ASCONF timer 1768 * if in non-open state, we will set this timer 1769 * when the state does go open and do all the 1770 * asconf's 1771 */ 1772 if (status == 0 && 1773 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1774 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1775 stcb, stcb->asoc.primary_destination); 1776 } 1777 } 1778 } else { 1779 /* this is the boundall, no ASCONF case */ 1780 #if 0 /* assume kernel will delete this very shortly; add done above */ 1781 if (type == SCTP_DEL_IP_ADDRESS) { 1782 /* if deleting, add this addr to the do not use list */ 1783 sctp_add_local_addr_assoc(stcb, ifa); 1784 } 1785 #endif 1786 } 1787 } 1788 1789 static void 1790 sctp_addr_mgmt_ep(struct sctp_inpcb *inp, struct ifaddr *ifa, uint16_t type) 1791 { 1792 struct sctp_tcb *stcb; 1793 int s; 1794 1795 SCTP_INP_WLOCK(inp); 1796 /* make sure we're "allowed" to add this type of addr */ 1797 if (ifa->ifa_addr->sa_family == AF_INET6) { 1798 struct in6_ifaddr *ifa6; 1799 1800 /* invalid if we're not a v6 endpoint */ 1801 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1802 SCTP_INP_WUNLOCK(inp); 1803 return; 1804 } 1805 /* is the v6 addr really valid ? */ 1806 ifa6 = (struct in6_ifaddr *)ifa; 1807 if (IFA6_IS_DEPRECATED(ifa6) || 1808 (ifa6->ia6_flags & 1809 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) { 1810 /* can't use an invalid address */ 1811 SCTP_INP_WUNLOCK(inp); 1812 return; 1813 } 1814 } else if (ifa->ifa_addr->sa_family == AF_INET) { 1815 /* invalid if we are a v6 only endpoint */ 1816 struct in6pcb *inp6; 1817 inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1818 1819 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1820 (inp6->in6p_flags & IN6P_IPV6_V6ONLY) 1821 ) { 1822 SCTP_INP_WUNLOCK(inp); 1823 return; 1824 } 1825 } else { 1826 /* invalid address family */ 1827 SCTP_INP_WUNLOCK(inp); 1828 return; 1829 } 1830 /* is this endpoint subset bound ? */ 1831 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1832 /* subset bound endpoint */ 1833 if ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) { 1834 /* 1835 * subset bound, but ASCONFs not allowed... 1836 * if adding, nothing to do, since not allowed 1837 * if deleting, remove address from endpoint 1838 * peer will have to "timeout" this addr 1839 */ 1840 if (type == SCTP_DEL_IP_ADDRESS) { 1841 sctp_del_local_addr_ep(inp, ifa); 1842 } 1843 /* no asconfs to queue for this inp... */ 1844 SCTP_INP_WUNLOCK(inp); 1845 return; 1846 } else { 1847 /* 1848 * subset bound, ASCONFs allowed... 1849 * if adding, add address to endpoint list 1850 * if deleting, remove address from endpoint 1851 */ 1852 if (type == SCTP_ADD_IP_ADDRESS) { 1853 sctp_add_local_addr_ep(inp, ifa); 1854 } else { 1855 sctp_del_local_addr_ep(inp, ifa); 1856 } 1857 /* drop through and notify all asocs */ 1858 } 1859 } 1860 1861 s = splsoftnet(); 1862 /* process for all associations for this endpoint */ 1863 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 1864 SCTP_TCB_LOCK(stcb); 1865 sctp_addr_mgmt_assoc(inp, stcb, ifa, type); 1866 SCTP_TCB_UNLOCK(stcb); 1867 } /* for each stcb */ 1868 splx(s); 1869 SCTP_INP_WUNLOCK(inp); 1870 } 1871 1872 /* 1873 * restrict the use of this address 1874 */ 1875 static void 1876 sctp_addr_mgmt_restrict_ep(struct sctp_inpcb *inp, struct ifaddr *ifa) 1877 { 1878 struct sctp_tcb *stcb; 1879 int s; 1880 1881 /* is this endpoint bound to all? */ 1882 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1883 /* 1884 * Nothing to do for subset bound case. 1885 * Allow sctp_bindx() to manage the address lists 1886 */ 1887 return; 1888 } 1889 1890 s = splsoftnet(); 1891 SCTP_INP_RLOCK(inp); 1892 /* process for all associations for this endpoint */ 1893 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 1894 /* put this address on the "pending/do not use yet" list */ 1895 SCTP_TCB_LOCK(stcb); 1896 sctp_add_local_addr_assoc(stcb, ifa); 1897 SCTP_TCB_UNLOCK(stcb); 1898 #ifdef SCTP_DEBUG 1899 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1900 printf("restrict_ep: added addr to unusable list\n"); 1901 } 1902 #endif /* SCTP_DEBUG */ 1903 } /* for each stcb */ 1904 splx(s); 1905 SCTP_INP_RUNLOCK(inp); 1906 } 1907 1908 /* 1909 * this is only called for kernel initiated address changes 1910 * eg. it will check the PCB_FLAGS_AUTO_ASCONF flag 1911 */ 1912 static void 1913 sctp_addr_mgmt(struct ifaddr *ifa, uint16_t type) { 1914 struct sockaddr *sa; 1915 struct sctp_inpcb *inp; 1916 1917 /* make sure we care about this interface... */ 1918 if (!sctp_is_desired_interface_type(ifa)) { 1919 #ifdef SCTP_DEBUG 1920 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1921 printf("sctp_addr_mgmt: ignoring this interface\n"); 1922 } 1923 #endif /* SCTP_DEBUG */ 1924 return; 1925 } 1926 1927 sa = ifa->ifa_addr; 1928 if (sa->sa_family != AF_INET && sa->sa_family != AF_INET6) 1929 return; 1930 1931 #ifdef SCTP_DEBUG 1932 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1933 if (type == SCTP_ADD_IP_ADDRESS) 1934 printf("sctp_addr_mgmt: kernel adds "); 1935 else 1936 printf("sctp_addr_mgmt: kernel deletes "); 1937 sctp_print_address(sa); 1938 } 1939 #endif /* SCTP_DEBUG */ 1940 1941 /* go through all our PCB's */ 1942 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 1943 if (inp->sctp_flags & SCTP_PCB_FLAGS_AUTO_ASCONF) { 1944 sctp_addr_mgmt_ep(inp, ifa, type); 1945 } else { 1946 /* this address is going away anyways... */ 1947 if (type == SCTP_DEL_IP_ADDRESS) 1948 return; 1949 /* (temporarily) restrict this address */ 1950 sctp_addr_mgmt_restrict_ep(inp, ifa); 1951 } 1952 /* else, not allowing automatic asconf's, so ignore */ 1953 } /* for each inp */ 1954 } 1955 1956 /* 1957 * add/delete IP address requests from kernel (via routing change) 1958 * assumed that the address is non-broadcast, non-multicast 1959 * all addresses are passed from any type of interface-- need to filter 1960 * duplicate addresses may get requested 1961 */ 1962 1963 void 1964 sctp_add_ip_address(struct ifaddr *ifa) 1965 { 1966 sctp_addr_mgmt(ifa, SCTP_ADD_IP_ADDRESS); 1967 } 1968 1969 void 1970 sctp_delete_ip_address(struct ifaddr *ifa) 1971 { 1972 struct sctp_inpcb *inp; 1973 1974 /* process the delete */ 1975 sctp_addr_mgmt(ifa, SCTP_DEL_IP_ADDRESS); 1976 1977 /* 1978 * need to remove this ifaddr from any cached routes 1979 * and also any from any assoc "restricted/pending" lists 1980 */ 1981 /* make sure we care about this interface... */ 1982 if (!sctp_is_desired_interface_type(ifa)) { 1983 #ifdef SCTP_DEBUG 1984 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 1985 printf("sctp_delete_ip_address: ignoring this interface\n"); 1986 } 1987 #endif /* SCTP_DEBUG */ 1988 return; 1989 } 1990 1991 /* go through all our PCB's */ 1992 SCTP_INP_INFO_RLOCK(); 1993 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 1994 struct sctp_tcb *stcb; 1995 struct sctp_laddr *laddr, *laddr_next; 1996 1997 /* process for all associations for this endpoint */ 1998 SCTP_INP_RLOCK(inp); 1999 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2000 struct sctp_nets *net; 2001 2002 /* process through the nets list */ 2003 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2004 rtcache_free(&net->ro); /* XXX - was clear */ 2005 } /* for each net */ 2006 /* process through the asoc "pending" list */ 2007 laddr = LIST_FIRST(&stcb->asoc.sctp_local_addr_list); 2008 while (laddr != NULL) { 2009 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr); 2010 /* remove if in use */ 2011 if (laddr->ifa == ifa) { 2012 sctp_remove_laddr(laddr); 2013 } 2014 laddr = laddr_next; 2015 } /* while */ 2016 } /* for each stcb */ 2017 /* process through the inp bound addr list */ 2018 laddr = LIST_FIRST(&inp->sctp_addr_list); 2019 while (laddr != NULL) { 2020 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr); 2021 /* remove if in use */ 2022 if (laddr->ifa == ifa) { 2023 sctp_remove_laddr(laddr); 2024 } 2025 laddr = laddr_next; 2026 } /* while */ 2027 SCTP_INP_RUNLOCK(inp); 2028 } /* for each inp */ 2029 SCTP_INP_INFO_RUNLOCK(); 2030 } 2031 2032 /* 2033 * sa is the sockaddr to ask the peer to set primary to 2034 * returns: 0 = completed, -1 = error 2035 */ 2036 int32_t 2037 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2038 { 2039 /* NOTE: we currently don't check the validity of the address! */ 2040 2041 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2042 if (!sctp_asconf_queue_add_sa(stcb, sa, SCTP_SET_PRIM_ADDR)) { 2043 /* set primary queuing succeeded */ 2044 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2045 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2046 stcb->sctp_ep, stcb, 2047 stcb->asoc.primary_destination); 2048 } 2049 #ifdef SCTP_DEBUG 2050 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2051 printf("set_primary_ip_address_sa: queued on tcb=%p, ", 2052 stcb); 2053 sctp_print_address(sa); 2054 } 2055 #endif /* SCTP_DEBUG */ 2056 } else { 2057 #ifdef SCTP_DEBUG 2058 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2059 printf("set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2060 stcb); 2061 sctp_print_address(sa); 2062 } 2063 #endif /* SCTP_DEBUG */ 2064 return (-1); 2065 } 2066 return (0); 2067 } 2068 2069 void 2070 sctp_set_primary_ip_address(struct ifaddr *ifa) 2071 { 2072 struct sctp_inpcb *inp; 2073 2074 /* make sure we care about this interface... */ 2075 if (!sctp_is_desired_interface_type(ifa)) { 2076 #ifdef SCTP_DEBUG 2077 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2078 printf("set_primary_ip_address: ignoring this interface\n"); 2079 } 2080 #endif /* SCTP_DEBUG */ 2081 return; 2082 } 2083 2084 /* go through all our PCB's */ 2085 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 2086 struct sctp_tcb *stcb; 2087 2088 /* process for all associations for this endpoint */ 2089 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2090 /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2091 if (!sctp_asconf_queue_add(stcb, ifa, 2092 SCTP_SET_PRIM_ADDR)) { 2093 /* set primary queuing succeeded */ 2094 if (SCTP_GET_STATE(&stcb->asoc) == 2095 SCTP_STATE_OPEN) { 2096 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2097 stcb->sctp_ep, stcb, 2098 stcb->asoc.primary_destination); 2099 } 2100 #ifdef SCTP_DEBUG 2101 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2102 printf("set_primary_ip_address: queued on stcb=%p, ", 2103 stcb); 2104 sctp_print_address(ifa->ifa_addr); 2105 } 2106 #endif /* SCTP_DEBUG */ 2107 } else { 2108 #ifdef SCTP_DEBUG 2109 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2110 printf("set_primary_ip_address: failed to add to queue, "); 2111 sctp_print_address(ifa->ifa_addr); 2112 } 2113 #endif /* SCTP_DEBUG */ 2114 } 2115 } /* for each stcb */ 2116 } /* for each inp */ 2117 } 2118 2119 static struct sockaddr * 2120 sctp_find_valid_localaddr(struct sctp_tcb *stcb) 2121 { 2122 struct ifnet *ifn; 2123 struct ifaddr *ifa; 2124 int s; 2125 2126 s = pserialize_read_enter(); 2127 IFNET_READER_FOREACH(ifn) { 2128 if (stcb->asoc.loopback_scope == 0 && ifn->if_type == IFT_LOOP) { 2129 /* Skip if loopback_scope not set */ 2130 continue; 2131 } 2132 IFADDR_READER_FOREACH(ifa, ifn) { 2133 if (ifa->ifa_addr->sa_family == AF_INET && 2134 stcb->asoc.ipv4_addr_legal) { 2135 struct sockaddr_in *sin; 2136 2137 sin = (struct sockaddr_in *)ifa->ifa_addr; 2138 if (sin->sin_addr.s_addr == 0) { 2139 /* skip unspecifed addresses */ 2140 continue; 2141 } 2142 if (stcb->asoc.ipv4_local_scope == 0 && 2143 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2144 continue; 2145 2146 if (sctp_is_addr_restricted(stcb, 2147 ifa->ifa_addr)) 2148 continue; 2149 pserialize_read_exit(s); 2150 2151 /* found a valid local v4 address to use */ 2152 return (ifa->ifa_addr); 2153 } else if (ifa->ifa_addr->sa_family == AF_INET6 && 2154 stcb->asoc.ipv6_addr_legal) { 2155 struct sockaddr_in6 *sin6; 2156 struct in6_ifaddr *ifa6; 2157 2158 ifa6 = (struct in6_ifaddr *)ifa; 2159 if (IFA6_IS_DEPRECATED(ifa6) || 2160 (ifa6->ia6_flags & (IN6_IFF_DETACHED | 2161 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) 2162 continue; 2163 2164 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 2165 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2166 /* we skip unspecifed addresses */ 2167 continue; 2168 } 2169 if (stcb->asoc.local_scope == 0 && 2170 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2171 continue; 2172 if (stcb->asoc.site_scope == 0 && 2173 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2174 continue; 2175 2176 pserialize_read_exit(s); 2177 /* found a valid local v6 address to use */ 2178 return (ifa->ifa_addr); 2179 } 2180 } 2181 } 2182 pserialize_read_exit(s); 2183 2184 /* no valid addresses found */ 2185 return (NULL); 2186 } 2187 2188 static struct sockaddr * 2189 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2190 { 2191 struct sctp_laddr *laddr; 2192 2193 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2194 if (laddr->ifa == NULL) { 2195 #ifdef SCTP_DEBUG 2196 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2197 printf("find_valid_localaddr_ep: laddr error\n"); 2198 } 2199 #endif /* SCTP_DEBUG */ 2200 continue; 2201 } 2202 if (laddr->ifa->ifa_addr == NULL) { 2203 #ifdef SCTP_DEBUG 2204 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2205 printf("find_valid_localaddr_ep: laddr->ifa error\n"); 2206 } 2207 #endif /* SCTP_DEBUG */ 2208 continue; 2209 } 2210 /* is the address restricted ? */ 2211 if (sctp_is_addr_restricted(stcb, laddr->ifa->ifa_addr)) 2212 continue; 2213 2214 /* found a valid local address to use */ 2215 return (laddr->ifa->ifa_addr); 2216 } 2217 /* no valid addresses found */ 2218 return (NULL); 2219 } 2220 2221 /* 2222 * builds an ASCONF chunk from queued ASCONF params 2223 * returns NULL on error (no mbuf, no ASCONF params queued, etc) 2224 */ 2225 struct mbuf * 2226 sctp_compose_asconf(struct sctp_tcb *stcb) 2227 { 2228 struct mbuf *m_asconf, *m_asconf_chk; 2229 struct sctp_asconf_addr *aa; 2230 struct sctp_asconf_chunk *acp; 2231 struct sctp_asconf_paramhdr *aph; 2232 struct sctp_asconf_addr_param *aap; 2233 uint32_t p_length; 2234 uint32_t correlation_id = 1; /* 0 is reserved... */ 2235 vaddr_t ptr, lookup_ptr; 2236 uint8_t lookup_used = 0; 2237 2238 /* are there any asconf params to send? */ 2239 if (TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 2240 return (NULL); 2241 } 2242 2243 /* 2244 * get a chunk header mbuf and a cluster for the asconf params 2245 * since it's simpler to fill in the asconf chunk header lookup 2246 * address on the fly 2247 */ 2248 m_asconf_chk = NULL; 2249 MGETHDR(m_asconf_chk, M_DONTWAIT, MT_DATA); 2250 if (m_asconf_chk == NULL) { 2251 /* no mbuf's */ 2252 #ifdef SCTP_DEBUG 2253 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2254 printf("compose_asconf: couldn't get chunk mbuf!\n"); 2255 #endif /* SCTP_DEBUG */ 2256 return (NULL); 2257 } 2258 m_asconf = NULL; 2259 MGETHDR(m_asconf, M_DONTWAIT, MT_HEADER); 2260 if (m_asconf == NULL) { 2261 /* no mbuf's */ 2262 #ifdef SCTP_DEBUG 2263 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2264 printf("compose_asconf: couldn't get mbuf!\n"); 2265 #endif /* SCTP_DEBUG */ 2266 sctp_m_freem(m_asconf_chk); 2267 return (NULL); 2268 } 2269 MCLGET(m_asconf, M_DONTWAIT); 2270 if ((m_asconf->m_flags & M_EXT) != M_EXT) { 2271 /* failed to get cluster buffer */ 2272 #ifdef SCTP_DEBUG 2273 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2274 printf("compose_asconf: couldn't get cluster!\n"); 2275 #endif /* SCTP_DEBUG */ 2276 sctp_m_freem(m_asconf_chk); 2277 sctp_m_freem(m_asconf); 2278 return (NULL); 2279 } 2280 2281 m_asconf_chk->m_len = sizeof(struct sctp_asconf_chunk); 2282 m_asconf->m_len = 0; 2283 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2284 memset(acp, 0, sizeof(struct sctp_asconf_chunk)); 2285 /* save pointers to lookup address and asconf params */ 2286 lookup_ptr = (vaddr_t)(acp + 1); /* after the header */ 2287 ptr = mtod(m_asconf, vaddr_t); /* beginning of cluster */ 2288 2289 /* fill in chunk header info */ 2290 acp->ch.chunk_type = SCTP_ASCONF; 2291 acp->ch.chunk_flags = 0; 2292 acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2293 2294 /* add parameters... up to smallest MTU allowed */ 2295 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2296 /* get the parameter length */ 2297 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2298 /* will it fit in current chunk? */ 2299 if (m_asconf->m_len + p_length > stcb->asoc.smallest_mtu) { 2300 /* won't fit, so we're done with this chunk */ 2301 break; 2302 } 2303 /* assign (and store) a correlation id */ 2304 aa->ap.aph.correlation_id = correlation_id++; 2305 2306 /* 2307 * fill in address if we're doing a delete 2308 * this is a simple way for us to fill in the correlation 2309 * address, which should only be used by the peer if we're 2310 * deleting our source address and adding a new address 2311 * (e.g. renumbering case) 2312 */ 2313 if (lookup_used == 0 && 2314 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2315 struct sctp_ipv6addr_param *lookup; 2316 uint16_t p_size, addr_size; 2317 2318 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2319 lookup->ph.param_type = 2320 htons(aa->ap.addrp.ph.param_type); 2321 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2322 /* copy IPv6 address */ 2323 p_size = sizeof(struct sctp_ipv6addr_param); 2324 addr_size = sizeof(struct in6_addr); 2325 } else { 2326 /* copy IPv4 address */ 2327 p_size = sizeof(struct sctp_ipv4addr_param); 2328 addr_size = sizeof(struct in_addr); 2329 } 2330 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2331 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2332 m_asconf_chk->m_len += SCTP_SIZE32(p_size); 2333 lookup_used = 1; 2334 } 2335 2336 /* copy into current space */ 2337 memcpy((void *)ptr, &aa->ap, p_length); 2338 2339 /* network elements and update lengths */ 2340 aph = (struct sctp_asconf_paramhdr *) ptr; 2341 aap = (struct sctp_asconf_addr_param *) ptr; 2342 /* correlation_id is transparent to peer, no htonl needed */ 2343 aph->ph.param_type = htons(aph->ph.param_type); 2344 aph->ph.param_length = htons(aph->ph.param_length); 2345 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2346 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2347 2348 m_asconf->m_len += SCTP_SIZE32(p_length); 2349 ptr += SCTP_SIZE32(p_length); 2350 2351 /* 2352 * these params are removed off the pending list upon 2353 * getting an ASCONF-ACK back from the peer, just set flag 2354 */ 2355 aa->sent = 1; 2356 } 2357 /* check to see if the lookup addr has been populated yet */ 2358 if (lookup_used == 0) { 2359 /* NOTE: if the address param is optional, can skip this... */ 2360 /* add any valid (existing) address... */ 2361 struct sctp_ipv6addr_param *lookup; 2362 uint16_t p_size, addr_size; 2363 struct sockaddr *found_addr; 2364 vaddr_t addr_ptr; 2365 2366 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2367 found_addr = sctp_find_valid_localaddr(stcb); 2368 else 2369 found_addr = sctp_find_valid_localaddr_ep(stcb); 2370 2371 lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2372 if (found_addr != NULL) { 2373 if (found_addr->sa_family == AF_INET6) { 2374 /* copy IPv6 address */ 2375 lookup->ph.param_type = 2376 htons(SCTP_IPV6_ADDRESS); 2377 p_size = sizeof(struct sctp_ipv6addr_param); 2378 addr_size = sizeof(struct in6_addr); 2379 addr_ptr = (vaddr_t)&((struct sockaddr_in6 *) 2380 found_addr)->sin6_addr; 2381 } else { 2382 /* copy IPv4 address */ 2383 lookup->ph.param_type = 2384 htons(SCTP_IPV4_ADDRESS); 2385 p_size = sizeof(struct sctp_ipv4addr_param); 2386 addr_size = sizeof(struct in_addr); 2387 addr_ptr = (vaddr_t)&((struct sockaddr_in *) 2388 found_addr)->sin_addr; 2389 } 2390 lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2391 memcpy(lookup->addr, (void *)addr_ptr, addr_size); 2392 m_asconf_chk->m_len += SCTP_SIZE32(p_size); 2393 lookup_used = 1; 2394 } else { 2395 /* uh oh... don't have any address?? */ 2396 #ifdef SCTP_DEBUG 2397 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) 2398 printf("compose_asconf: no lookup addr!\n"); 2399 #endif /* SCTP_DEBUG */ 2400 /* for now, we send a IPv4 address of 0.0.0.0 */ 2401 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2402 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2403 memset(lookup->addr, 0, sizeof(struct in_addr)); 2404 m_asconf_chk->m_len += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2405 lookup_used = 1; 2406 } 2407 } 2408 2409 /* chain it all together */ 2410 m_asconf_chk->m_next = m_asconf; 2411 m_asconf_chk->m_pkthdr.len = m_asconf_chk->m_len + m_asconf->m_len; 2412 acp->ch.chunk_length = ntohs(m_asconf_chk->m_pkthdr.len); 2413 2414 /* update "sent" flag */ 2415 stcb->asoc.asconf_sent++; 2416 2417 return (m_asconf_chk); 2418 } 2419 2420 /* 2421 * section to handle address changes before an association is up 2422 * eg. changes during INIT/INIT-ACK/COOKIE-ECHO handshake 2423 */ 2424 2425 /* 2426 * processes the (local) addresses in the INIT-ACK chunk 2427 */ 2428 static void 2429 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2430 unsigned int offset, unsigned int length) 2431 { 2432 struct sctp_paramhdr tmp_param, *ph; 2433 uint16_t plen, ptype; 2434 struct sctp_ipv6addr_param addr_store; 2435 struct sockaddr_in6 sin6; 2436 struct sockaddr_in sin; 2437 struct sockaddr *sa; 2438 struct ifaddr *ifa; 2439 2440 #ifdef SCTP_DEBUG 2441 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2442 printf("processing init-ack addresses\n"); 2443 } 2444 #endif /* SCTP_DEBUG */ 2445 2446 /* convert to upper bound */ 2447 length += offset; 2448 2449 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2450 #ifdef SCTP_DEBUG 2451 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2452 printf("process_initack_addrs: invalid offset?\n"); 2453 } 2454 #endif /* SCTP_DEBUG */ 2455 return; 2456 } 2457 2458 /* init the addresses */ 2459 memset(&sin6, 0, sizeof(sin6)); 2460 sin6.sin6_family = AF_INET6; 2461 sin6.sin6_len = sizeof(sin6); 2462 sin6.sin6_port = stcb->rport; 2463 2464 memset(&sin, 0, sizeof(sin)); 2465 sin.sin_len = sizeof(sin); 2466 sin.sin_family = AF_INET; 2467 sin.sin_port = stcb->rport; 2468 2469 /* go through the addresses in the init-ack */ 2470 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2471 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2472 while (ph != NULL) { 2473 ptype = ntohs(ph->param_type); 2474 plen = ntohs(ph->param_length); 2475 if (ptype == SCTP_IPV6_ADDRESS) { 2476 struct sctp_ipv6addr_param *a6p; 2477 /* get the entire IPv6 address param */ 2478 #ifdef SCTP_DEBUG 2479 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2480 printf("process_initack_addrs: checking IPv6 param\n"); 2481 } 2482 #endif /* SCTP_DEBUG */ 2483 a6p = (struct sctp_ipv6addr_param *) 2484 sctp_m_getptr(m, offset, 2485 sizeof(struct sctp_ipv6addr_param), 2486 (uint8_t *)&addr_store); 2487 if (plen != sizeof(struct sctp_ipv6addr_param) || 2488 a6p == NULL) { 2489 #ifdef SCTP_DEBUG 2490 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2491 printf("process_initack_addrs: invalid IPv6 param length\n"); 2492 } 2493 #endif /* SCTP_DEBUG */ 2494 return; 2495 } 2496 memcpy(&sin6.sin6_addr, a6p->addr, 2497 sizeof(struct in6_addr)); 2498 sa = (struct sockaddr *)&sin6; 2499 } else if (ptype == SCTP_IPV4_ADDRESS) { 2500 struct sctp_ipv4addr_param *a4p; 2501 /* get the entire IPv4 address param */ 2502 #ifdef SCTP_DEBUG 2503 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2504 printf("process_initack_addrs: checking IPv4 param\n"); 2505 } 2506 #endif /* SCTP_DEBUG */ 2507 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_ipv4addr_param), (uint8_t *)&addr_store); 2508 if (plen != sizeof(struct sctp_ipv4addr_param) || 2509 a4p == NULL) { 2510 #ifdef SCTP_DEBUG 2511 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2512 printf("process_initack_addrs: invalid IPv4 param length\n"); 2513 } 2514 #endif /* SCTP_DEBUG */ 2515 return; 2516 } 2517 sin.sin_addr.s_addr = a4p->addr; 2518 sa = (struct sockaddr *)&sin; 2519 } else { 2520 #ifdef SCTP_DEBUG 2521 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2522 printf("process_initack_addrs: skipping param type=%xh\n", ptype); 2523 } 2524 #endif /* SCTP_DEBUG */ 2525 goto next_addr; 2526 } 2527 2528 /* see if this address really (still) exists */ 2529 ifa = sctp_find_ifa_by_addr(sa); 2530 if (ifa == NULL) { 2531 /* address doesn't exist anymore */ 2532 int status; 2533 /* are ASCONFs allowed ? */ 2534 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) && 2535 stcb->asoc.peer_supports_asconf) { 2536 /* queue an ASCONF DEL_IP_ADDRESS */ 2537 status = sctp_asconf_queue_add_sa(stcb, sa, 2538 SCTP_DEL_IP_ADDRESS); 2539 /* 2540 * if queued ok, and in correct state, 2541 * set the ASCONF timer 2542 */ 2543 if (status == 0 && 2544 SCTP_GET_STATE(&stcb->asoc) == 2545 SCTP_STATE_OPEN) { 2546 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2547 stcb->sctp_ep, stcb, 2548 stcb->asoc.primary_destination); 2549 } 2550 } 2551 } else { 2552 /* address still exists */ 2553 /* 2554 * if subset bound, ep addr's managed by default 2555 * if not doing ASCONF, add the address to the assoc 2556 */ 2557 if ((stcb->sctp_ep->sctp_flags & 2558 SCTP_PCB_FLAGS_BOUNDALL) == 0 && 2559 (stcb->sctp_ep->sctp_flags & 2560 SCTP_PCB_FLAGS_DO_ASCONF) == 0) { 2561 #ifdef SCTP_DEBUG 2562 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2563 printf("process_initack_addrs: adding local addr to asoc\n"); 2564 } 2565 #endif /* SCTP_DEBUG */ 2566 sctp_add_local_addr_assoc(stcb, ifa); 2567 } 2568 } 2569 2570 next_addr: 2571 /* get next parameter */ 2572 offset += SCTP_SIZE32(plen); 2573 if ((offset + sizeof(struct sctp_paramhdr)) > length) 2574 return; 2575 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2576 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2577 } /* while */ 2578 } 2579 2580 /* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2581 /* 2582 * checks to see if a specific address is in the initack address list 2583 * returns 1 if found, 0 if not 2584 */ 2585 static uint32_t 2586 sctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, unsigned int offset, 2587 unsigned int length, struct sockaddr *sa) 2588 { 2589 struct sctp_paramhdr tmp_param, *ph; 2590 uint16_t plen, ptype; 2591 struct sctp_ipv6addr_param addr_store; 2592 struct sockaddr_in *sin; 2593 struct sctp_ipv4addr_param *a4p; 2594 #ifdef INET6 2595 struct sockaddr_in6 *sin6, sin6_tmp; 2596 struct sctp_ipv6addr_param *a6p; 2597 #endif /* INET6 */ 2598 2599 if ( 2600 #ifdef INET6 2601 (sa->sa_family != AF_INET6) && 2602 #endif /* INET6 */ 2603 (sa->sa_family != AF_INET)) 2604 return (0); 2605 2606 #ifdef SCTP_DEBUG 2607 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2608 printf("find_initack_addr: starting search for "); 2609 sctp_print_address(sa); 2610 } 2611 #endif /* SCTP_DEBUG */ 2612 /* convert to upper bound */ 2613 length += offset; 2614 2615 if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2616 #ifdef SCTP_DEBUG 2617 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2618 printf("find_initack_addr: invalid offset?\n"); 2619 } 2620 #endif /* SCTP_DEBUG */ 2621 return (0); 2622 } 2623 2624 /* go through the addresses in the init-ack */ 2625 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2626 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); 2627 while (ph != NULL) { 2628 ptype = ntohs(ph->param_type); 2629 plen = ntohs(ph->param_length); 2630 #ifdef INET6 2631 if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) { 2632 /* get the entire IPv6 address param */ 2633 #ifdef SCTP_DEBUG 2634 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2635 printf("addr_in_initack: checking IPv6 param\n"); 2636 } 2637 #endif /* SCTP_DEBUG */ 2638 a6p = (struct sctp_ipv6addr_param *) 2639 sctp_m_getptr(m, offset, 2640 sizeof(struct sctp_ipv6addr_param), 2641 (uint8_t *)&addr_store); 2642 if (plen != sizeof(struct sctp_ipv6addr_param) || 2643 ph == NULL) { 2644 #ifdef SCTP_DEBUG 2645 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2646 printf("addr_in_initack: invalid IPv6 param length\n"); 2647 } 2648 #endif /* SCTP_DEBUG */ 2649 return (0); 2650 } 2651 sin6 = (struct sockaddr_in6 *)sa; 2652 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2653 /* create a copy and clear scope */ 2654 memcpy(&sin6_tmp, sin6, 2655 sizeof(struct sockaddr_in6)); 2656 sin6 = &sin6_tmp; 2657 in6_clearscope(&sin6->sin6_addr); 2658 } 2659 if (memcmp(&sin6->sin6_addr, a6p->addr, 2660 sizeof(struct in6_addr)) == 0) { 2661 /* found it */ 2662 #ifdef SCTP_DEBUG 2663 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2664 printf("addr_in_initack: found IPv6 addr\n"); 2665 } 2666 #endif /* SCTP_DEBUG */ 2667 return (1); 2668 } 2669 } else 2670 #endif /* INET6 */ 2671 2672 if (ptype == SCTP_IPV4_ADDRESS && 2673 sa->sa_family == AF_INET) { 2674 /* get the entire IPv4 address param */ 2675 #ifdef SCTP_DEBUG 2676 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2677 printf("addr_in_initack: checking IPv4 param\n"); 2678 } 2679 #endif /* SCTP_DEBUG */ 2680 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, 2681 offset, sizeof(struct sctp_ipv4addr_param), 2682 (uint8_t *)&addr_store); 2683 if (plen != sizeof(struct sctp_ipv4addr_param) || 2684 ph == NULL) { 2685 #ifdef SCTP_DEBUG 2686 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2687 printf("addr_in_initack: invalid IPv4 param length\n"); 2688 } 2689 #endif /* SCTP_DEBUG */ 2690 return (0); 2691 } 2692 sin = (struct sockaddr_in *)sa; 2693 if (sin->sin_addr.s_addr == a4p->addr) { 2694 /* found it */ 2695 #ifdef SCTP_DEBUG 2696 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2697 printf("addr_in_initack: found IPv4 addr\n"); 2698 } 2699 #endif /* SCTP_DEBUG */ 2700 return (1); 2701 } 2702 } else { 2703 #ifdef SCTP_DEBUG 2704 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2705 printf("addr_in_initack: skipping param type=%xh\n", ptype); 2706 } 2707 #endif /* SCTP_DEBUG */ 2708 } 2709 /* get next parameter */ 2710 offset += SCTP_SIZE32(plen); 2711 if (offset + sizeof(struct sctp_paramhdr) > length) 2712 return (0); 2713 ph = (struct sctp_paramhdr *) 2714 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2715 (uint8_t *)&tmp_param); 2716 } /* while */ 2717 /* not found! */ 2718 #ifdef SCTP_DEBUG 2719 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2720 printf("addr_in_initack: not found!\n"); 2721 } 2722 #endif /* SCTP_DEBUG */ 2723 return (0); 2724 } 2725 2726 /* 2727 * makes sure that the current endpoint local addr list is consistent 2728 * with the new association (eg. subset bound, asconf allowed) 2729 * adds addresses as necessary 2730 */ 2731 static void 2732 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2733 int length, struct sockaddr *init_addr) 2734 { 2735 struct sctp_laddr *laddr; 2736 2737 /* go through the endpoint list */ 2738 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2739 /* be paranoid and validate the laddr */ 2740 if (laddr->ifa == NULL) { 2741 #ifdef SCTP_DEBUG 2742 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2743 printf("check_addr_list_ep: laddr->ifa is NULL"); 2744 } 2745 #endif 2746 continue; 2747 } 2748 if (laddr->ifa->ifa_addr == NULL) { 2749 #ifdef SCTP_DEBUG 2750 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2751 printf("check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 2752 } 2753 #endif 2754 continue; 2755 } 2756 /* do i have it implicitly? */ 2757 if (sctp_cmpaddr(laddr->ifa->ifa_addr, init_addr)) { 2758 #ifdef SCTP_DEBUG 2759 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2760 printf("check_address_list_all: skipping "); 2761 sctp_print_address(laddr->ifa->ifa_addr); 2762 } 2763 #endif /* SCTP_DEBUG */ 2764 continue; 2765 } 2766 /* check to see if in the init-ack */ 2767 if (!sctp_addr_in_initack(stcb, m, offset, length, 2768 laddr->ifa->ifa_addr)) { 2769 /* try to add it */ 2770 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 2771 SCTP_ADD_IP_ADDRESS); 2772 } 2773 } 2774 } 2775 2776 /* 2777 * makes sure that the current kernel address list is consistent 2778 * with the new association (with all addrs bound) 2779 * adds addresses as necessary 2780 */ 2781 static void 2782 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2783 int length, struct sockaddr *init_addr, uint16_t local_scope, 2784 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope) 2785 { 2786 struct ifnet *ifn; 2787 struct ifaddr *ifa; 2788 int s; 2789 2790 /* go through all our known interfaces */ 2791 s = pserialize_read_enter(); 2792 IFNET_READER_FOREACH(ifn) { 2793 if (loopback_scope == 0 && ifn->if_type == IFT_LOOP) { 2794 /* skip loopback interface */ 2795 continue; 2796 } 2797 2798 /* go through each interface address */ 2799 IFADDR_READER_FOREACH(ifa, ifn) { 2800 /* do i have it implicitly? */ 2801 if (sctp_cmpaddr(ifa->ifa_addr, init_addr)) { 2802 #ifdef SCTP_DEBUG 2803 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) { 2804 printf("check_address_list_all: skipping "); 2805 sctp_print_address(ifa->ifa_addr); 2806 } 2807 #endif /* SCTP_DEBUG */ 2808 continue; 2809 } 2810 /* check to see if in the init-ack */ 2811 if (!sctp_addr_in_initack(stcb, m, offset, length, 2812 ifa->ifa_addr)) { 2813 /* try to add it */ 2814 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 2815 ifa, SCTP_ADD_IP_ADDRESS); 2816 } 2817 } /* end foreach ifa */ 2818 } /* end foreach ifn */ 2819 pserialize_read_exit(s); 2820 } 2821 2822 /* 2823 * validates an init-ack chunk (from a cookie-echo) with current addresses 2824 * adds addresses from the init-ack into our local address list, if needed 2825 * queues asconf adds/deletes addresses as needed and makes appropriate 2826 * list changes for source address selection 2827 * m, offset: points to the start of the address list in an init-ack chunk 2828 * length: total length of the address params only 2829 * init_addr: address where my INIT-ACK was sent from 2830 */ 2831 void 2832 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2833 int length, struct sockaddr *init_addr, uint16_t local_scope, 2834 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope) 2835 { 2836 2837 /* process the local addresses in the initack */ 2838 sctp_process_initack_addresses(stcb, m, offset, length); 2839 2840 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2841 /* bound all case */ 2842 sctp_check_address_list_all(stcb, m, offset, length, init_addr, 2843 local_scope, site_scope, ipv4_scope, loopback_scope); 2844 } else { 2845 /* subset bound case */ 2846 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) { 2847 /* asconf's allowed */ 2848 sctp_check_address_list_ep(stcb, m, offset, length, 2849 init_addr); 2850 } 2851 /* else, no asconfs allowed, so what we sent is what we get */ 2852 } 2853 } 2854 2855 /* 2856 * sctp_bindx() support 2857 */ 2858 uint32_t 2859 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, uint16_t type) 2860 { 2861 struct ifaddr *ifa; 2862 2863 if (sa->sa_len == 0) 2864 return (EINVAL); 2865 2866 ifa = sctp_find_ifa_by_addr(sa); 2867 if (ifa != NULL) { 2868 #ifdef INET6 2869 if (ifa->ifa_addr->sa_family == AF_INET6) { 2870 struct in6_ifaddr *ifa6; 2871 ifa6 = (struct in6_ifaddr *)ifa; 2872 if (IFA6_IS_DEPRECATED(ifa6) || 2873 (ifa6->ia6_flags & (IN6_IFF_DETACHED | 2874 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) { 2875 /* Can't bind a non-existent addr. */ 2876 return (EINVAL); 2877 } 2878 } 2879 #endif /* INET6 */ 2880 /* add this address */ 2881 sctp_addr_mgmt_ep(inp, ifa, type); 2882 } else { 2883 /* invalid address! */ 2884 #ifdef SCTP_DEBUG 2885 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) { 2886 printf("addr_mgmt_ep_sa: got invalid address!\n"); 2887 } 2888 #endif /* SCTP_DEBUG */ 2889 return (EADDRNOTAVAIL); 2890 } 2891 return (0); 2892 } 2893
Indexes created Mon Sep 22 21:09:42 GMT 2025