sys/netinet/sctp_asconf.c

   1 /*-
   2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *   the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /* $KAME: sctp_asconf.c,v 1.24 2005/03/06 16:04:16 itojun Exp $  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37 #include <netinet/sctp_os.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctp_header.h>
  42 #include <netinet/sctputil.h>
  43 #include <netinet/sctp_output.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_timer.h>
  46
  47 /*
  48  * debug flags:
  49  * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
  50  * SCTP_DEBUG_ASCONF2: detailed info
  51  */
  52 #ifdef SCTP_DEBUG
  53 #endif                          /* SCTP_DEBUG */
  54
  55
  56 static void
  57 sctp_asconf_get_source_ip(struct mbuf *m, struct sockaddr *sa)
  58 {
  59         struct ip *iph;
  60
  61 #ifdef INET
  62         struct sockaddr_in *sin;
  63
  64 #endif
  65 #ifdef INET6
  66         struct sockaddr_in6 *sin6;
  67
  68 #endif
  69
  70         iph = mtod(m, struct ip *);
  71         switch (iph->ip_v) {
  72 #ifdef INET
  73         case IPVERSION:
  74                 {
  75                         /* IPv4 source */
  76                         sin = (struct sockaddr_in *)sa;
  77                         bzero(sin, sizeof(*sin));
  78                         sin->sin_family = AF_INET;
  79                         sin->sin_len = sizeof(struct sockaddr_in);
  80                         sin->sin_port = 0;
  81                         sin->sin_addr.s_addr = iph->ip_src.s_addr;
  82                         break;
  83                 }
  84 #endif
  85 #ifdef INET6
  86         case (IPV6_VERSION >> 4):
  87                 {
  88                         /* IPv6 source */
  89                         struct ip6_hdr *ip6;
  90
  91                         sin6 = (struct sockaddr_in6 *)sa;
  92                         bzero(sin6, sizeof(*sin6));
  93                         sin6->sin6_family = AF_INET6;
  94                         sin6->sin6_len = sizeof(struct sockaddr_in6);
  95                         sin6->sin6_port = 0;
  96                         ip6 = mtod(m, struct ip6_hdr *);
  97                         sin6->sin6_addr = ip6->ip6_src;
  98                         break;
  99                 }
 100 #endif                          /* INET6 */
 101         default:
 102                 break;
 103         }
 104         return;
 105 }
 106
 107 /*
 108  * draft-ietf-tsvwg-addip-sctp
 109  *
 110  * An ASCONF parameter queue exists per asoc which holds the pending address
 111  * operations.  Lists are updated upon receipt of ASCONF-ACK.
 112  *
 113  * A restricted_addrs list exists per assoc to hold local addresses that are
 114  * not (yet) usable by the assoc as a source address.  These addresses are
 115  * either pending an ASCONF operation (and exist on the ASCONF parameter
 116  * queue), or they are permanently restricted (the peer has returned an
 117  * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
 118  *
 119  * Deleted addresses are always immediately removed from the lists as they will
 120  * (shortly) no longer exist in the kernel.  We send ASCONFs as a courtesy,
 121  * only if allowed.
 122  */
 123
 124 /*
 125  * ASCONF parameter processing.
 126  * response_required: set if a reply is required (eg. SUCCESS_REPORT).
 127  * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
 128  * FIX: allocating this many mbufs on the fly is pretty inefficient...
 129  */
 130 static struct mbuf *
 131 sctp_asconf_success_response(uint32_t id)
 132 {
 133         struct mbuf *m_reply = NULL;
 134         struct sctp_asconf_paramhdr *aph;
 135
 136         m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
 137             0, M_DONTWAIT, 1, MT_DATA);
 138         if (m_reply == NULL) {
 139                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 140                     "asconf_success_response: couldn't get mbuf!\n");
 141                 return NULL;
 142         }
 143         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 144         aph->correlation_id = id;
 145         aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
 146         aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
 147         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 148         aph->ph.param_length = htons(aph->ph.param_length);
 149
 150         return m_reply;
 151 }
 152
 153 static struct mbuf *
 154 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv,
 155     uint16_t tlv_length)
 156 {
 157         struct mbuf *m_reply = NULL;
 158         struct sctp_asconf_paramhdr *aph;
 159         struct sctp_error_cause *error;
 160         uint8_t *tlv;
 161
 162         m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) +
 163             tlv_length +
 164             sizeof(struct sctp_error_cause)),
 165             0, M_DONTWAIT, 1, MT_DATA);
 166         if (m_reply == NULL) {
 167                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 168                     "asconf_error_response: couldn't get mbuf!\n");
 169                 return NULL;
 170         }
 171         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 172         error = (struct sctp_error_cause *)(aph + 1);
 173
 174         aph->correlation_id = id;
 175         aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
 176         error->code = htons(cause);
 177         error->length = tlv_length + sizeof(struct sctp_error_cause);
 178         aph->ph.param_length = error->length +
 179             sizeof(struct sctp_asconf_paramhdr);
 180
 181         if (aph->ph.param_length > MLEN) {
 182                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 183                     "asconf_error_response: tlv_length (%xh) too big\n",
 184                     tlv_length);
 185                 sctp_m_freem(m_reply);  /* discard */
 186                 return NULL;
 187         }
 188         if (error_tlv != NULL) {
 189                 tlv = (uint8_t *) (error + 1);
 190                 memcpy(tlv, error_tlv, tlv_length);
 191         }
 192         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 193         error->length = htons(error->length);
 194         aph->ph.param_length = htons(aph->ph.param_length);
 195
 196         return m_reply;
 197 }
 198
 199 static struct mbuf *
 200 sctp_process_asconf_add_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
 201     struct sctp_tcb *stcb, int send_hb, int response_required)
 202 {
 203         struct sctp_nets *net;
 204         struct mbuf *m_reply = NULL;
 205         struct sockaddr_storage sa_source, sa_store;
 206         struct sctp_paramhdr *ph;
 207         uint16_t param_type, param_length, aparam_length;
 208         struct sockaddr *sa;
 209         int zero_address = 0;
 210         int bad_address = 0;
 211
 212 #ifdef INET
 213         struct sockaddr_in *sin;
 214         struct sctp_ipv4addr_param *v4addr;
 215
 216 #endif
 217 #ifdef INET6
 218         struct sockaddr_in6 *sin6;
 219         struct sctp_ipv6addr_param *v6addr;
 220
 221 #endif
 222
 223         aparam_length = ntohs(aph->ph.param_length);
 224         ph = (struct sctp_paramhdr *)(aph + 1);
 225         param_type = ntohs(ph->param_type);
 226         param_length = ntohs(ph->param_length);
 227
 228         sa = (struct sockaddr *)&sa_store;
 229         switch (param_type) {
 230 #ifdef INET
 231         case SCTP_IPV4_ADDRESS:
 232                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 233                         /* invalid param size */
 234                         return NULL;
 235                 }
 236                 v4addr = (struct sctp_ipv4addr_param *)ph;
 237                 sin = (struct sockaddr_in *)&sa_store;
 238                 bzero(sin, sizeof(*sin));
 239                 sin->sin_family = AF_INET;
 240                 sin->sin_len = sizeof(struct sockaddr_in);
 241                 sin->sin_port = stcb->rport;
 242                 sin->sin_addr.s_addr = v4addr->addr;
 243                 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 244                     IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 245                         bad_address = 1;
 246                 }
 247                 if (sin->sin_addr.s_addr == INADDR_ANY)
 248                         zero_address = 1;
 249                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 250                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 251                 break;
 252 #endif
 253 #ifdef INET6
 254         case SCTP_IPV6_ADDRESS:
 255                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 256                         /* invalid param size */
 257                         return NULL;
 258                 }
 259                 v6addr = (struct sctp_ipv6addr_param *)ph;
 260                 sin6 = (struct sockaddr_in6 *)&sa_store;
 261                 bzero(sin6, sizeof(*sin6));
 262                 sin6->sin6_family = AF_INET6;
 263                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 264                 sin6->sin6_port = stcb->rport;
 265                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 266                     sizeof(struct in6_addr));
 267                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 268                         bad_address = 1;
 269                 }
 270                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 271                         zero_address = 1;
 272                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 273                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 274                 break;
 275 #endif
 276         default:
 277                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 278                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph,
 279                     aparam_length);
 280                 return m_reply;
 281         }                       /* end switch */
 282
 283         /* if 0.0.0.0/::0, add the source address instead */
 284         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 285                 sa = (struct sockaddr *)&sa_source;
 286                 sctp_asconf_get_source_ip(m, sa);
 287                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 288                     "process_asconf_add_ip: using source addr ");
 289                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 290         }
 291         /* add the address */
 292         if (bad_address) {
 293                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 294                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph,
 295                     aparam_length);
 296         } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE,
 297             SCTP_ADDR_DYNAMIC_ADDED) != 0) {
 298                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 299                     "process_asconf_add_ip: error adding address\n");
 300                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 301                     SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph,
 302                     aparam_length);
 303         } else {
 304                 /* notify upper layer */
 305                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 306                 if (response_required) {
 307                         m_reply =
 308                             sctp_asconf_success_response(aph->correlation_id);
 309                 }
 310                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
 311                 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
 312                     stcb, net);
 313                 if (send_hb) {
 314                         sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 315                 }
 316         }
 317         return m_reply;
 318 }
 319
 320 static int
 321 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
 322 {
 323         struct sctp_nets *src_net, *net;
 324
 325         /* make sure the source address exists as a destination net */
 326         src_net = sctp_findnet(stcb, src);
 327         if (src_net == NULL) {
 328                 /* not found */
 329                 return -1;
 330         }
 331         /* delete all destination addresses except the source */
 332         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 333                 if (net != src_net) {
 334                         /* delete this address */
 335                         sctp_remove_net(stcb, net);
 336                         SCTPDBG(SCTP_DEBUG_ASCONF1,
 337                             "asconf_del_remote_addrs_except: deleting ");
 338                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
 339                             (struct sockaddr *)&net->ro._l_addr);
 340                         /* notify upper layer */
 341                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
 342                             (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
 343                 }
 344         }
 345         return 0;
 346 }
 347
 348 static struct mbuf *
 349 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
 350     struct sctp_tcb *stcb, int response_required)
 351 {
 352         struct mbuf *m_reply = NULL;
 353         struct sockaddr_storage sa_source, sa_store;
 354         struct sctp_paramhdr *ph;
 355         uint16_t param_type, param_length, aparam_length;
 356         struct sockaddr *sa;
 357         int zero_address = 0;
 358         int result;
 359
 360 #ifdef INET
 361         struct sockaddr_in *sin;
 362         struct sctp_ipv4addr_param *v4addr;
 363
 364 #endif
 365 #ifdef INET6
 366         struct sockaddr_in6 *sin6;
 367         struct sctp_ipv6addr_param *v6addr;
 368
 369 #endif
 370
 371         /* get the source IP address for src and 0.0.0.0/::0 delete checks */
 372         sctp_asconf_get_source_ip(m, (struct sockaddr *)&sa_source);
 373
 374         aparam_length = ntohs(aph->ph.param_length);
 375         ph = (struct sctp_paramhdr *)(aph + 1);
 376         param_type = ntohs(ph->param_type);
 377         param_length = ntohs(ph->param_length);
 378
 379         sa = (struct sockaddr *)&sa_store;
 380         switch (param_type) {
 381 #ifdef INET
 382         case SCTP_IPV4_ADDRESS:
 383                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 384                         /* invalid param size */
 385                         return NULL;
 386                 }
 387                 v4addr = (struct sctp_ipv4addr_param *)ph;
 388                 sin = (struct sockaddr_in *)&sa_store;
 389                 bzero(sin, sizeof(*sin));
 390                 sin->sin_family = AF_INET;
 391                 sin->sin_len = sizeof(struct sockaddr_in);
 392                 sin->sin_port = stcb->rport;
 393                 sin->sin_addr.s_addr = v4addr->addr;
 394                 if (sin->sin_addr.s_addr == INADDR_ANY)
 395                         zero_address = 1;
 396                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 397                     "process_asconf_delete_ip: deleting ");
 398                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 399                 break;
 400 #endif
 401 #ifdef INET6
 402         case SCTP_IPV6_ADDRESS:
 403                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 404                         /* invalid param size */
 405                         return NULL;
 406                 }
 407                 v6addr = (struct sctp_ipv6addr_param *)ph;
 408                 sin6 = (struct sockaddr_in6 *)&sa_store;
 409                 bzero(sin6, sizeof(*sin6));
 410                 sin6->sin6_family = AF_INET6;
 411                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 412                 sin6->sin6_port = stcb->rport;
 413                 memcpy(&sin6->sin6_addr, v6addr->addr,
 414                     sizeof(struct in6_addr));
 415                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 416                         zero_address = 1;
 417                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 418                     "process_asconf_delete_ip: deleting ");
 419                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 420                 break;
 421 #endif
 422         default:
 423                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 424                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 425                     aparam_length);
 426                 return m_reply;
 427         }
 428
 429         /* make sure the source address is not being deleted */
 430         if (sctp_cmpaddr(sa, (struct sockaddr *)&sa_source)) {
 431                 /* trying to delete the source address! */
 432                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
 433                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 434                     SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph,
 435                     aparam_length);
 436                 return m_reply;
 437         }
 438         /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
 439         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 440                 result = sctp_asconf_del_remote_addrs_except(stcb,
 441                     (struct sockaddr *)&sa_source);
 442
 443                 if (result) {
 444                         /* src address did not exist? */
 445                         SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
 446                         /* what error to reply with?? */
 447                         m_reply =
 448                             sctp_asconf_error_response(aph->correlation_id,
 449                             SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph,
 450                             aparam_length);
 451                 } else if (response_required) {
 452                         m_reply =
 453                             sctp_asconf_success_response(aph->correlation_id);
 454                 }
 455                 return m_reply;
 456         }
 457         /* delete the address */
 458         result = sctp_del_remote_addr(stcb, sa);
 459         /*
 460          * note if result == -2, the address doesn't exist in the asoc but
 461          * since it's being deleted anyways, we just ack the delete -- but
 462          * this probably means something has already gone awry
 463          */
 464         if (result == -1) {
 465                 /* only one address in the asoc */
 466                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
 467                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 468                     SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph,
 469                     aparam_length);
 470         } else {
 471                 if (response_required) {
 472                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 473                 }
 474                 /* notify upper layer */
 475                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 476         }
 477         return m_reply;
 478 }
 479
 480 static struct mbuf *
 481 sctp_process_asconf_set_primary(struct mbuf *m,
 482     struct sctp_asconf_paramhdr *aph,
 483     struct sctp_tcb *stcb, int response_required)
 484 {
 485         struct mbuf *m_reply = NULL;
 486         struct sockaddr_storage sa_source, sa_store;
 487         struct sctp_paramhdr *ph;
 488         uint16_t param_type, param_length, aparam_length;
 489         struct sockaddr *sa;
 490         int zero_address = 0;
 491
 492 #ifdef INET
 493         struct sockaddr_in *sin;
 494         struct sctp_ipv4addr_param *v4addr;
 495
 496 #endif
 497 #ifdef INET6
 498         struct sockaddr_in6 *sin6;
 499         struct sctp_ipv6addr_param *v6addr;
 500
 501 #endif
 502
 503         aparam_length = ntohs(aph->ph.param_length);
 504         ph = (struct sctp_paramhdr *)(aph + 1);
 505         param_type = ntohs(ph->param_type);
 506         param_length = ntohs(ph->param_length);
 507
 508         sa = (struct sockaddr *)&sa_store;
 509         switch (param_type) {
 510 #ifdef INET
 511         case SCTP_IPV4_ADDRESS:
 512                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 513                         /* invalid param size */
 514                         return NULL;
 515                 }
 516                 v4addr = (struct sctp_ipv4addr_param *)ph;
 517                 sin = (struct sockaddr_in *)&sa_store;
 518                 bzero(sin, sizeof(*sin));
 519                 sin->sin_family = AF_INET;
 520                 sin->sin_len = sizeof(struct sockaddr_in);
 521                 sin->sin_addr.s_addr = v4addr->addr;
 522                 if (sin->sin_addr.s_addr == INADDR_ANY)
 523                         zero_address = 1;
 524                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 525                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 526                 break;
 527 #endif
 528 #ifdef INET6
 529         case SCTP_IPV6_ADDRESS:
 530                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 531                         /* invalid param size */
 532                         return NULL;
 533                 }
 534                 v6addr = (struct sctp_ipv6addr_param *)ph;
 535                 sin6 = (struct sockaddr_in6 *)&sa_store;
 536                 bzero(sin6, sizeof(*sin6));
 537                 sin6->sin6_family = AF_INET6;
 538                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 539                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 540                     sizeof(struct in6_addr));
 541                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 542                         zero_address = 1;
 543                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 544                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 545                 break;
 546 #endif
 547         default:
 548                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 549                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 550                     aparam_length);
 551                 return m_reply;
 552         }
 553
 554         /* if 0.0.0.0/::0, use the source address instead */
 555         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 556                 sa = (struct sockaddr *)&sa_source;
 557                 sctp_asconf_get_source_ip(m, sa);
 558                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 559                     "process_asconf_set_primary: using source addr ");
 560                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 561         }
 562         /* set the primary address */
 563         if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
 564                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 565                     "process_asconf_set_primary: primary address set\n");
 566                 /* notify upper layer */
 567                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 568                 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) &&
 569                     (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) &&
 570                     (stcb->asoc.alternate)) {
 571                         sctp_free_remote_addr(stcb->asoc.alternate);
 572                         stcb->asoc.alternate = NULL;
 573                 }
 574                 if (response_required) {
 575                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 576                 }
 577                 /*
 578                  * Mobility adaptation. Ideally, when the reception of SET
 579                  * PRIMARY with DELETE IP ADDRESS of the previous primary
 580                  * destination, unacknowledged DATA are retransmitted
 581                  * immediately to the new primary destination for seamless
 582                  * handover. If the destination is UNCONFIRMED and marked to
 583                  * REQ_PRIM, The retransmission occur when reception of the
 584                  * HEARTBEAT-ACK.  (See sctp_handle_heartbeat_ack in
 585                  * sctp_input.c) Also, when change of the primary
 586                  * destination, it is better that all subsequent new DATA
 587                  * containing already queued DATA are transmitted to the new
 588                  * primary destination. (by micchie)
 589                  */
 590                 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
 591                     SCTP_MOBILITY_BASE) ||
 592                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 593                     SCTP_MOBILITY_FASTHANDOFF)) &&
 594                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 595                     SCTP_MOBILITY_PRIM_DELETED) &&
 596                     (stcb->asoc.primary_destination->dest_state &
 597                     SCTP_ADDR_UNCONFIRMED) == 0) {
 598
 599                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7);
 600                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 601                             SCTP_MOBILITY_FASTHANDOFF)) {
 602                                 sctp_assoc_immediate_retrans(stcb,
 603                                     stcb->asoc.primary_destination);
 604                         }
 605                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 606                             SCTP_MOBILITY_BASE)) {
 607                                 sctp_move_chunks_from_net(stcb,
 608                                     stcb->asoc.deleted_primary);
 609                         }
 610                         sctp_delete_prim_timer(stcb->sctp_ep, stcb,
 611                             stcb->asoc.deleted_primary);
 612                 }
 613         } else {
 614                 /* couldn't set the requested primary address! */
 615                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 616                     "process_asconf_set_primary: set primary failed!\n");
 617                 /* must have been an invalid address, so report */
 618                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 619                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 620                     aparam_length);
 621         }
 622
 623         return m_reply;
 624 }
 625
 626 /*
 627  * handles an ASCONF chunk.
 628  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 629  */
 630 void
 631 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 632     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 633     int first)
 634 {
 635         struct sctp_association *asoc;
 636         uint32_t serial_num;
 637         struct mbuf *n, *m_ack, *m_result, *m_tail;
 638         struct sctp_asconf_ack_chunk *ack_cp;
 639         struct sctp_asconf_paramhdr *aph, *ack_aph;
 640         struct sctp_ipv6addr_param *p_addr;
 641         unsigned int asconf_limit, cnt;
 642         int error = 0;          /* did an error occur? */
 643
 644         /* asconf param buffer */
 645         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 646         struct sctp_asconf_ack *ack, *ack_next;
 647
 648         /* verify minimum length */
 649         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 650                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 651                     "handle_asconf: chunk too small = %xh\n",
 652                     ntohs(cp->ch.chunk_length));
 653                 return;
 654         }
 655         asoc = &stcb->asoc;
 656         serial_num = ntohl(cp->serial_number);
 657
 658         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 659                 /* got a duplicate ASCONF */
 660                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 661                     "handle_asconf: got duplicate serial number = %xh\n",
 662                     serial_num);
 663                 return;
 664         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 665                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 666                     serial_num, asoc->asconf_seq_in + 1);
 667                 return;
 668         }
 669         /* it's the expected "next" sequence number, so process it */
 670         asoc->asconf_seq_in = serial_num;       /* update sequence */
 671         /* get length of all the param's in the ASCONF */
 672         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 673         SCTPDBG(SCTP_DEBUG_ASCONF1,
 674             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 675             asconf_limit, serial_num);
 676
 677         if (first) {
 678                 /* delete old cache */
 679                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 680
 681                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 682                         if (ack->serial_number == serial_num)
 683                                 break;
 684                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 685                             ack->serial_number, serial_num);
 686                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 687                         if (ack->data != NULL) {
 688                                 sctp_m_freem(ack->data);
 689                         }
 690                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 691                 }
 692         }
 693         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 694             M_DONTWAIT, 1, MT_DATA);
 695         if (m_ack == NULL) {
 696                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 697                     "handle_asconf: couldn't get mbuf!\n");
 698                 return;
 699         }
 700         m_tail = m_ack;         /* current reply chain's tail */
 701
 702         /* fill in ASCONF-ACK header */
 703         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 704         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 705         ack_cp->ch.chunk_flags = 0;
 706         ack_cp->serial_number = htonl(serial_num);
 707         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 708         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 709         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 710
 711         /* skip the lookup address parameter */
 712         offset += sizeof(struct sctp_asconf_chunk);
 713         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf);
 714         if (p_addr == NULL) {
 715                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 716                     "handle_asconf: couldn't get lookup addr!\n");
 717                 /* respond with a missing/invalid mandatory parameter error */
 718                 return;
 719         }
 720         /* param_length is already validated in process_control... */
 721         offset += ntohs(p_addr->ph.param_length);       /* skip lookup addr */
 722
 723         /* get pointer to first asconf param in ASCONF-ACK */
 724         ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk));
 725         if (ack_aph == NULL) {
 726                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n");
 727                 return;
 728         }
 729         /* get pointer to first asconf param in ASCONF */
 730         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf);
 731         if (aph == NULL) {
 732                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 733                 goto send_reply;
 734         }
 735         /* process through all parameters */
 736         cnt = 0;
 737         while (aph != NULL) {
 738                 unsigned int param_length, param_type;
 739
 740                 param_type = ntohs(aph->ph.param_type);
 741                 param_length = ntohs(aph->ph.param_length);
 742                 if (offset + param_length > asconf_limit) {
 743                         /* parameter goes beyond end of chunk! */
 744                         sctp_m_freem(m_ack);
 745                         return;
 746                 }
 747                 m_result = NULL;
 748
 749                 if (param_length > sizeof(aparam_buf)) {
 750                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 751                         sctp_m_freem(m_ack);
 752                         return;
 753                 }
 754                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 755                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 756                         sctp_m_freem(m_ack);
 757                 }
 758                 /* get the entire parameter */
 759                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 760                 if (aph == NULL) {
 761                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 762                         sctp_m_freem(m_ack);
 763                         return;
 764                 }
 765                 switch (param_type) {
 766                 case SCTP_ADD_IP_ADDRESS:
 767                         asoc->peer_supports_asconf = 1;
 768                         m_result = sctp_process_asconf_add_ip(m, aph, stcb,
 769                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 770                         cnt++;
 771                         break;
 772                 case SCTP_DEL_IP_ADDRESS:
 773                         asoc->peer_supports_asconf = 1;
 774                         m_result = sctp_process_asconf_delete_ip(m, aph, stcb,
 775                             error);
 776                         break;
 777                 case SCTP_ERROR_CAUSE_IND:
 778                         /* not valid in an ASCONF chunk */
 779                         break;
 780                 case SCTP_SET_PRIM_ADDR:
 781                         asoc->peer_supports_asconf = 1;
 782                         m_result = sctp_process_asconf_set_primary(m, aph,
 783                             stcb, error);
 784                         break;
 785                 case SCTP_NAT_VTAGS:
 786                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 787                         break;
 788                 case SCTP_SUCCESS_REPORT:
 789                         /* not valid in an ASCONF chunk */
 790                         break;
 791                 case SCTP_ULP_ADAPTATION:
 792                         /* FIX */
 793                         break;
 794                 default:
 795                         if ((param_type & 0x8000) == 0) {
 796                                 /* Been told to STOP at this param */
 797                                 asconf_limit = offset;
 798                                 /*
 799                                  * FIX FIX - We need to call
 800                                  * sctp_arethere_unrecognized_parameters()
 801                                  * to get a operr and send it for any
 802                                  * param's with the 0x4000 bit set OR do it
 803                                  * here ourselves... note we still must STOP
 804                                  * if the 0x8000 bit is clear.
 805                                  */
 806                         }
 807                         /* unknown/invalid param type */
 808                         break;
 809                 }               /* switch */
 810
 811                 /* add any (error) result to the reply mbuf chain */
 812                 if (m_result != NULL) {
 813                         SCTP_BUF_NEXT(m_tail) = m_result;
 814                         m_tail = m_result;
 815                         /* update lengths, make sure it's aligned too */
 816                         SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result));
 817                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 818                         /* set flag to force success reports */
 819                         error = 1;
 820                 }
 821                 offset += SCTP_SIZE32(param_length);
 822                 /* update remaining ASCONF message length to process */
 823                 if (offset >= asconf_limit) {
 824                         /* no more data in the mbuf chain */
 825                         break;
 826                 }
 827                 /* get pointer to next asconf param */
 828                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 829                     sizeof(struct sctp_asconf_paramhdr),
 830                     (uint8_t *) & aparam_buf);
 831                 if (aph == NULL) {
 832                         /* can't get an asconf paramhdr */
 833                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 834                         /* FIX ME - add error here... */
 835                 }
 836         }
 837
 838 send_reply:
 839         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 840         /* save the ASCONF-ACK reply */
 841         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 842             struct sctp_asconf_ack);
 843         if (ack == NULL) {
 844                 sctp_m_freem(m_ack);
 845                 return;
 846         }
 847         ack->serial_number = serial_num;
 848         ack->last_sent_to = NULL;
 849         ack->data = m_ack;
 850         ack->len = 0;
 851         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 852                 ack->len += SCTP_BUF_LEN(n);
 853         }
 854         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 855
 856         /* see if last_control_chunk_from is set properly (use IP src addr) */
 857         if (stcb->asoc.last_control_chunk_from == NULL) {
 858                 /*
 859                  * this could happen if the source address was just newly
 860                  * added
 861                  */
 862                 struct ip *iph;
 863                 struct sctphdr *sh;
 864                 struct sockaddr_storage from_store;
 865                 struct sockaddr *from = (struct sockaddr *)&from_store;
 866
 867                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 868                 /* pullup already done, IP options already stripped */
 869                 iph = mtod(m, struct ip *);
 870                 switch (iph->ip_v) {
 871 #ifdef INET
 872                 case IPVERSION:
 873                         {
 874                                 struct sockaddr_in *from4;
 875
 876                                 sh = (struct sctphdr *)((caddr_t)iph + sizeof(*iph));
 877                                 from4 = (struct sockaddr_in *)&from_store;
 878                                 bzero(from4, sizeof(*from4));
 879                                 from4->sin_family = AF_INET;
 880                                 from4->sin_len = sizeof(struct sockaddr_in);
 881                                 from4->sin_addr.s_addr = iph->ip_src.s_addr;
 882                                 from4->sin_port = sh->src_port;
 883                                 break;
 884                         }
 885 #endif
 886 #ifdef INET6
 887                 case IPV6_VERSION >> 4:
 888                         {
 889                                 struct ip6_hdr *ip6;
 890                                 struct sockaddr_in6 *from6;
 891
 892                                 ip6 = mtod(m, struct ip6_hdr *);
 893                                 sh = (struct sctphdr *)((caddr_t)ip6 + sizeof(*ip6));
 894                                 from6 = (struct sockaddr_in6 *)&from_store;
 895                                 bzero(from6, sizeof(*from6));
 896                                 from6->sin6_family = AF_INET6;
 897                                 from6->sin6_len = sizeof(struct sockaddr_in6);
 898                                 from6->sin6_addr = ip6->ip6_src;
 899                                 from6->sin6_port = sh->src_port;
 900                                 /*
 901                                  * Get the scopes in properly to the sin6
 902                                  * addr's
 903                                  */
 904                                 /* we probably don't need these operations */
 905                                 (void)sa6_recoverscope(from6);
 906                                 sa6_embedscope(from6,
 907                                     MODULE_GLOBAL(ip6_use_defzone));
 908
 909                                 break;
 910                         }
 911 #endif
 912                 default:
 913                         /* unknown address type */
 914                         from = NULL;
 915                 }
 916                 if (from != NULL) {
 917                         SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 918                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, from);
 919                         /* look up the from address */
 920                         stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, from);
 921 #ifdef SCTP_DEBUG
 922                         if (stcb->asoc.last_control_chunk_from == NULL)
 923                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 924 #endif
 925                 }
 926         }
 927 }
 928
 929 /*
 930  * does the address match? returns 0 if not, 1 if so
 931  */
 932 static uint32_t
 933 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 934 {
 935         switch (sa->sa_family) {
 936 #ifdef INET6
 937         case AF_INET6:
 938                 {
 939                         /* XXX scopeid */
 940                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 941
 942                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 943                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 944                             sizeof(struct in6_addr)) == 0)) {
 945                                 return (1);
 946                         }
 947                         break;
 948                 }
 949 #endif
 950 #ifdef INET
 951         case AF_INET:
 952                 {
 953                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 954
 955                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 956                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 957                             sizeof(struct in_addr)) == 0)) {
 958                                 return (1);
 959                         }
 960                         break;
 961                 }
 962 #endif
 963         default:
 964                 break;
 965         }
 966         return (0);
 967 }
 968
 969 /*
 970  * does the address match? returns 0 if not, 1 if so
 971  */
 972 static uint32_t
 973 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 974 {
 975         uint16_t param_type, param_length;
 976
 977         param_type = ntohs(ph->param_type);
 978         param_length = ntohs(ph->param_length);
 979         switch (sa->sa_family) {
 980 #ifdef INET6
 981         case AF_INET6:
 982                 {
 983                         /* XXX scopeid */
 984                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 985                         struct sctp_ipv6addr_param *v6addr;
 986
 987                         v6addr = (struct sctp_ipv6addr_param *)ph;
 988                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 989                             param_length == sizeof(struct sctp_ipv6addr_param) &&
 990                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 991                             sizeof(struct in6_addr)) == 0)) {
 992                                 return (1);
 993                         }
 994                         break;
 995                 }
 996 #endif
 997 #ifdef INET
 998         case AF_INET:
 999                 {
1000                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1001                         struct sctp_ipv4addr_param *v4addr;
1002
1003                         v4addr = (struct sctp_ipv4addr_param *)ph;
1004                         if ((param_type == SCTP_IPV4_ADDRESS) &&
1005                             param_length == sizeof(struct sctp_ipv4addr_param) &&
1006                             (memcmp(&v4addr->addr, &sin->sin_addr,
1007                             sizeof(struct in_addr)) == 0)) {
1008                                 return (1);
1009                         }
1010                         break;
1011                 }
1012 #endif
1013         default:
1014                 break;
1015         }
1016         return (0);
1017 }
1018
1019 /*
1020  * Cleanup for non-responded/OP ERR'd ASCONF
1021  */
1022 void
1023 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
1024 {
1025         /* mark peer as ASCONF incapable */
1026         stcb->asoc.peer_supports_asconf = 0;
1027         /*
1028          * clear out any existing asconfs going out
1029          */
1030         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1031             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
1032         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
1033         /* remove the old ASCONF on our outbound queue */
1034         sctp_toss_old_asconf(stcb);
1035 }
1036
1037 /*
1038  * cleanup any cached source addresses that may be topologically
1039  * incorrect after a new address has been added to this interface.
1040  */
1041 static void
1042 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
1043 {
1044         struct sctp_nets *net;
1045
1046         /*
1047          * Ideally, we want to only clear cached routes and source addresses
1048          * that are topologically incorrect.  But since there is no easy way
1049          * to know whether the newly added address on the ifn would cause a
1050          * routing change (i.e. a new egress interface would be chosen)
1051          * without doing a new routing lookup and source address selection,
1052          * we will (for now) just flush any cached route using a different
1053          * ifn (and cached source addrs) and let output re-choose them
1054          * during the next send on that net.
1055          */
1056         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1057                 /*
1058                  * clear any cached route (and cached source address) if the
1059                  * route's interface is NOT the same as the address change.
1060                  * If it's the same interface, just clear the cached source
1061                  * address.
1062                  */
1063                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
1064                     ((ifn == NULL) ||
1065                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
1066                         /* clear any cached route */
1067                         RTFREE(net->ro.ro_rt);
1068                         net->ro.ro_rt = NULL;
1069                 }
1070                 /* clear any cached source address */
1071                 if (net->src_addr_selected) {
1072                         sctp_free_ifa(net->ro._s_addr);
1073                         net->ro._s_addr = NULL;
1074                         net->src_addr_selected = 0;
1075                 }
1076         }
1077 }
1078
1079
1080 void
1081 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
1082 {
1083         int error;
1084
1085         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
1086                 return;
1087         }
1088         if (stcb->asoc.deleted_primary == NULL) {
1089                 return;
1090         }
1091         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
1092                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
1093                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1094                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
1095                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
1096                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
1097                     stcb->asoc.deleted_primary,
1098                     SCTP_FROM_SCTP_TIMER + SCTP_LOC_8);
1099                 stcb->asoc.num_send_timers_up--;
1100                 if (stcb->asoc.num_send_timers_up < 0) {
1101                         stcb->asoc.num_send_timers_up = 0;
1102                 }
1103                 SCTP_TCB_LOCK_ASSERT(stcb);
1104                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1105                     stcb->asoc.deleted_primary);
1106                 if (error) {
1107                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1108                         return;
1109                 }
1110                 SCTP_TCB_LOCK_ASSERT(stcb);
1111 #ifdef SCTP_AUDITING_ENABLED
1112                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1113 #endif
1114                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1115                 if ((stcb->asoc.num_send_timers_up == 0) &&
1116                     (stcb->asoc.sent_queue_cnt > 0)) {
1117                         struct sctp_tmit_chunk *chk;
1118
1119                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1120                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1121                             stcb, chk->whoTo);
1122                 }
1123         }
1124         return;
1125 }
1126
1127 static int
1128     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1129
1130 void
1131 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1132 {
1133         struct sctp_tmit_chunk *chk;
1134
1135         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1136         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1137             SCTP_FROM_SCTP_TIMER + SCTP_LOC_5);
1138         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1139         net->error_count = 0;
1140         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1141                 if (chk->whoTo == net) {
1142                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1143                                 chk->sent = SCTP_DATAGRAM_RESEND;
1144                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1145                                 sctp_flight_size_decrease(chk);
1146                                 sctp_total_flight_decrease(stcb, chk);
1147                                 net->marked_retrans++;
1148                                 stcb->asoc.marked_retrans++;
1149                         }
1150                 }
1151         }
1152         if (net->marked_retrans) {
1153                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1154         }
1155 }
1156
1157 static void
1158 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1159 {
1160         struct sctp_nets *net;
1161         int addrnum, changed;
1162
1163         /*
1164          * If number of local valid addresses is 1, the valid address is
1165          * probably newly added address. Several valid addresses in this
1166          * association.  A source address may not be changed.  Additionally,
1167          * they can be configured on a same interface as "alias" addresses.
1168          * (by micchie)
1169          */
1170         addrnum = sctp_local_addr_count(stcb);
1171         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1172             addrnum);
1173         if (addrnum == 1) {
1174                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1175                         /* clear any cached route and source address */
1176                         if (net->ro.ro_rt) {
1177                                 RTFREE(net->ro.ro_rt);
1178                                 net->ro.ro_rt = NULL;
1179                         }
1180                         if (net->src_addr_selected) {
1181                                 sctp_free_ifa(net->ro._s_addr);
1182                                 net->ro._s_addr = NULL;
1183                                 net->src_addr_selected = 0;
1184                         }
1185                         /* Retransmit unacknowledged DATA chunks immediately */
1186                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1187                             SCTP_MOBILITY_FASTHANDOFF)) {
1188                                 sctp_net_immediate_retrans(stcb, net);
1189                         }
1190                         /* also, SET PRIMARY is maybe already sent */
1191                 }
1192                 return;
1193         }
1194         /* Multiple local addresses exsist in the association.  */
1195         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1196                 /* clear any cached route and source address */
1197                 if (net->ro.ro_rt) {
1198                         RTFREE(net->ro.ro_rt);
1199                         net->ro.ro_rt = NULL;
1200                 }
1201                 if (net->src_addr_selected) {
1202                         sctp_free_ifa(net->ro._s_addr);
1203                         net->ro._s_addr = NULL;
1204                         net->src_addr_selected = 0;
1205                 }
1206                 /*
1207                  * Check if the nexthop is corresponding to the new address.
1208                  * If the new address is corresponding to the current
1209                  * nexthop, the path will be changed. If the new address is
1210                  * NOT corresponding to the current nexthop, the path will
1211                  * not be changed.
1212                  */
1213                 SCTP_RTALLOC((sctp_route_t *) & net->ro,
1214                     stcb->sctp_ep->def_vrf_id);
1215                 if (net->ro.ro_rt == NULL)
1216                         continue;
1217
1218                 changed = 0;
1219                 switch (net->ro._l_addr.sa.sa_family) {
1220 #ifdef INET
1221                 case AF_INET:
1222                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) {
1223                                 changed = 1;
1224                         }
1225                         break;
1226 #endif
1227 #ifdef INET6
1228                 case AF_INET6:
1229                         if (sctp_v6src_match_nexthop(
1230                             &newifa->address.sin6, (sctp_route_t *) & net->ro)) {
1231                                 changed = 1;
1232                         }
1233                         break;
1234 #endif
1235                 default:
1236                         break;
1237                 }
1238                 /*
1239                  * if the newly added address does not relate routing
1240                  * information, we skip.
1241                  */
1242                 if (changed == 0)
1243                         continue;
1244                 /* Retransmit unacknowledged DATA chunks immediately */
1245                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1246                     SCTP_MOBILITY_FASTHANDOFF)) {
1247                         sctp_net_immediate_retrans(stcb, net);
1248                 }
1249                 /* Send SET PRIMARY for this new address */
1250                 if (net == stcb->asoc.primary_destination) {
1251                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1252                             SCTP_SET_PRIM_ADDR);
1253                 }
1254         }
1255 }
1256
1257 /*
1258  * process an ADD/DELETE IP ack from peer.
1259  * addr: corresponding sctp_ifa to the address being added/deleted.
1260  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1261  * flag: 1=success, 0=failure.
1262  */
1263 static void
1264 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr,
1265     uint16_t type, uint32_t flag)
1266 {
1267         /*
1268          * do the necessary asoc list work- if we get a failure indication,
1269          * leave the address on the assoc's restricted list.  If we get a
1270          * success indication, remove the address from the restricted list.
1271          */
1272         /*
1273          * Note: this will only occur for ADD_IP_ADDRESS, since
1274          * DEL_IP_ADDRESS is never actually added to the list...
1275          */
1276         if (flag) {
1277                 /* success case, so remove from the restricted list */
1278                 sctp_del_local_addr_restricted(stcb, addr);
1279
1280                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1281                     SCTP_MOBILITY_BASE) ||
1282                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1283                     SCTP_MOBILITY_FASTHANDOFF)) {
1284                         sctp_path_check_and_react(stcb, addr);
1285                         return;
1286                 }
1287                 /* clear any cached/topologically incorrect source addresses */
1288                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1289         }
1290         /* else, leave it on the list */
1291 }
1292
1293 /*
1294  * add an asconf add/delete/set primary IP address parameter to the queue.
1295  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1296  * returns 0 if queued, -1 if not queued/removed.
1297  * NOTE: if adding, but a delete for the same address is already scheduled
1298  * (and not yet sent out), simply remove it from queue.  Same for deleting
1299  * an address already scheduled for add.  If a duplicate operation is found,
1300  * ignore the new one.
1301  */
1302 static int
1303 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1304     uint16_t type)
1305 {
1306         struct sctp_asconf_addr *aa, *aa_next;
1307         struct sockaddr *sa;
1308
1309         /* make sure the request isn't already in the queue */
1310         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1311                 /* address match? */
1312                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1313                         continue;
1314                 /*
1315                  * is the request already in queue but not sent? pass the
1316                  * request already sent in order to resolve the following
1317                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1318                  * can't remove the ADD request already sent 3. arrival of
1319                  * ADD
1320                  */
1321                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1322                         return (-1);
1323                 }
1324                 /* is the negative request already in queue, and not sent */
1325                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1326                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1327                         /* add requested, delete already queued */
1328                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1329                         /* remove the ifa from the restricted list */
1330                         sctp_del_local_addr_restricted(stcb, ifa);
1331                         /* free the asconf param */
1332                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1333                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1334                         return (-1);
1335                 }
1336                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1337                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1338                         /* delete requested, add already queued */
1339                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1340                         /* remove the aa->ifa from the restricted list */
1341                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1342                         /* free the asconf param */
1343                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1344                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1345                         return (-1);
1346                 }
1347         }                       /* for each aa */
1348
1349         /* adding new request to the queue */
1350         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1351             SCTP_M_ASC_ADDR);
1352         if (aa == NULL) {
1353                 /* didn't get memory */
1354                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1355                 return (-1);
1356         }
1357         aa->special_del = 0;
1358         /* fill in asconf address parameter fields */
1359         /* top level elements are "networked" during send */
1360         aa->ap.aph.ph.param_type = type;
1361         aa->ifa = ifa;
1362         atomic_add_int(&ifa->refcount, 1);
1363         /* correlation_id filled in during send routine later... */
1364         switch (ifa->address.sa.sa_family) {
1365 #ifdef INET6
1366         case AF_INET6:
1367                 {
1368                         struct sockaddr_in6 *sin6;
1369
1370                         sin6 = (struct sockaddr_in6 *)&ifa->address.sa;
1371                         sa = (struct sockaddr *)sin6;
1372                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1373                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1374                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1375                             sizeof(struct sctp_ipv6addr_param);
1376                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1377                             sizeof(struct in6_addr));
1378                         break;
1379                 }
1380 #endif
1381 #ifdef INET
1382         case AF_INET:
1383                 {
1384                         struct sockaddr_in *sin;
1385
1386                         sin = (struct sockaddr_in *)&ifa->address.sa;
1387                         sa = (struct sockaddr *)sin;
1388                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1389                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1390                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1391                             sizeof(struct sctp_ipv4addr_param);
1392                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1393                             sizeof(struct in_addr));
1394                         break;
1395                 }
1396 #endif
1397         default:
1398                 /* invalid family! */
1399                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1400                 sctp_free_ifa(ifa);
1401                 return (-1);
1402         }
1403         aa->sent = 0;           /* clear sent flag */
1404
1405         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1406 #ifdef SCTP_DEBUG
1407         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1408                 if (type == SCTP_ADD_IP_ADDRESS) {
1409                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1410                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1411                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1412                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1413                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1414                 } else {
1415                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1416                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1417                 }
1418         }
1419 #endif
1420
1421         return (0);
1422 }
1423
1424
1425 /*
1426  * add an asconf operation for the given ifa and type.
1427  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1428  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1429  * advisable.
1430  */
1431 static int
1432 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1433     uint16_t type)
1434 {
1435         uint32_t status;
1436         int pending_delete_queued = 0;
1437
1438         /* see if peer supports ASCONF */
1439         if (stcb->asoc.peer_supports_asconf == 0) {
1440                 return (-1);
1441         }
1442         /*
1443          * if this is deleting the last address from the assoc, mark it as
1444          * pending.
1445          */
1446         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending &&
1447             (sctp_local_addr_count(stcb) < 2)) {
1448                 /* set the pending delete info only */
1449                 stcb->asoc.asconf_del_pending = 1;
1450                 stcb->asoc.asconf_addr_del_pending = ifa;
1451                 atomic_add_int(&ifa->refcount, 1);
1452                 SCTPDBG(SCTP_DEBUG_ASCONF2,
1453                     "asconf_queue_add: mark delete last address pending\n");
1454                 return (-1);
1455         }
1456         /* queue an asconf parameter */
1457         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1458
1459         /*
1460          * if this is an add, and there is a delete also pending (i.e. the
1461          * last local address is being changed), queue the pending delete
1462          * too.
1463          */
1464         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1465                 /* queue in the pending delete */
1466                 if (sctp_asconf_queue_mgmt(stcb,
1467                     stcb->asoc.asconf_addr_del_pending,
1468                     SCTP_DEL_IP_ADDRESS) == 0) {
1469                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n");
1470                         pending_delete_queued = 1;
1471                         /* clear out the pending delete info */
1472                         stcb->asoc.asconf_del_pending = 0;
1473                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1474                         stcb->asoc.asconf_addr_del_pending = NULL;
1475                 }
1476         }
1477         if (pending_delete_queued) {
1478                 struct sctp_nets *net;
1479
1480                 /*
1481                  * since we know that the only/last address is now being
1482                  * changed in this case, reset the cwnd/rto on all nets to
1483                  * start as a new address and path.  Also clear the error
1484                  * counts to give the assoc the best chance to complete the
1485                  * address change.
1486                  */
1487                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1488                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1489                             net);
1490                         net->RTO = 0;
1491                         net->error_count = 0;
1492                 }
1493                 stcb->asoc.overall_error_count = 0;
1494                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1495                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1496                             stcb->asoc.overall_error_count,
1497                             0,
1498                             SCTP_FROM_SCTP_ASCONF,
1499                             __LINE__);
1500                 }
1501                 /* queue in an advisory set primary too */
1502                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1503                 /* let caller know we should send this out immediately */
1504                 status = 1;
1505         }
1506         return (status);
1507 }
1508
1509 /*-
1510  * add an asconf delete IP address parameter to the queue by sockaddr and
1511  * possibly with no sctp_ifa available.  This is only called by the routine
1512  * that checks the addresses in an INIT-ACK against the current address list.
1513  * returns 0 if completed, non-zero if not completed.
1514  * NOTE: if an add is already scheduled (and not yet sent out), simply
1515  * remove it from queue.  If a duplicate operation is found, ignore the
1516  * new one.
1517  */
1518 static int
1519 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1520 {
1521         struct sctp_ifa *ifa;
1522         struct sctp_asconf_addr *aa, *aa_next;
1523         uint32_t vrf_id;
1524
1525         if (stcb == NULL) {
1526                 return (-1);
1527         }
1528         /* see if peer supports ASCONF */
1529         if (stcb->asoc.peer_supports_asconf == 0) {
1530                 return (-1);
1531         }
1532         /* make sure the request isn't already in the queue */
1533         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1534                 /* address match? */
1535                 if (sctp_asconf_addr_match(aa, sa) == 0)
1536                         continue;
1537                 /* is the request already in queue (sent or not) */
1538                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1539                         return (-1);
1540                 }
1541                 /* is the negative request already in queue, and not sent */
1542                 if (aa->sent == 1)
1543                         continue;
1544                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1545                         /* add already queued, so remove existing entry */
1546                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1547                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1548                         /* free the entry */
1549                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1550                         return (-1);
1551                 }
1552         }                       /* for each aa */
1553
1554         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1555         if (stcb) {
1556                 vrf_id = stcb->asoc.vrf_id;
1557         } else {
1558                 vrf_id = SCTP_DEFAULT_VRFID;
1559         }
1560         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
1561
1562         /* adding new request to the queue */
1563         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1564             SCTP_M_ASC_ADDR);
1565         if (aa == NULL) {
1566                 /* didn't get memory */
1567                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1568                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1569                 return (-1);
1570         }
1571         aa->special_del = 0;
1572         /* fill in asconf address parameter fields */
1573         /* top level elements are "networked" during send */
1574         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1575         aa->ifa = ifa;
1576         if (ifa)
1577                 atomic_add_int(&ifa->refcount, 1);
1578         /* correlation_id filled in during send routine later... */
1579         switch (sa->sa_family) {
1580 #ifdef INET6
1581         case AF_INET6:
1582                 {
1583                         /* IPv6 address */
1584                         struct sockaddr_in6 *sin6;
1585
1586                         sin6 = (struct sockaddr_in6 *)sa;
1587                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1588                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1589                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1590                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1591                             sizeof(struct in6_addr));
1592                         break;
1593                 }
1594 #endif
1595 #ifdef INET
1596         case AF_INET:
1597                 {
1598                         /* IPv4 address */
1599                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1600
1601                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1602                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1603                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1604                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1605                             sizeof(struct in_addr));
1606                         break;
1607                 }
1608 #endif
1609         default:
1610                 /* invalid family! */
1611                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1612                 if (ifa)
1613                         sctp_free_ifa(ifa);
1614                 return (-1);
1615         }
1616         aa->sent = 0;           /* clear sent flag */
1617
1618         /* delete goes to the back of the queue */
1619         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1620
1621         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1622         return (0);
1623 }
1624
1625 /*
1626  * find a specific asconf param on our "sent" queue
1627  */
1628 static struct sctp_asconf_addr *
1629 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1630 {
1631         struct sctp_asconf_addr *aa;
1632
1633         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1634                 if (aa->ap.aph.correlation_id == correlation_id &&
1635                     aa->sent == 1) {
1636                         /* found it */
1637                         return (aa);
1638                 }
1639         }
1640         /* didn't find it */
1641         return (NULL);
1642 }
1643
1644 /*
1645  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1646  * notifications based on the error response
1647  */
1648 static void
1649 sctp_asconf_process_error(struct sctp_tcb *stcb,
1650     struct sctp_asconf_paramhdr *aph)
1651 {
1652         struct sctp_error_cause *eh;
1653         struct sctp_paramhdr *ph;
1654         uint16_t param_type;
1655         uint16_t error_code;
1656
1657         eh = (struct sctp_error_cause *)(aph + 1);
1658         ph = (struct sctp_paramhdr *)(eh + 1);
1659         /* validate lengths */
1660         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1661             htons(aph->ph.param_length)) {
1662                 /* invalid error cause length */
1663                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1664                     "asconf_process_error: cause element too long\n");
1665                 return;
1666         }
1667         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1668             htons(eh->length)) {
1669                 /* invalid included TLV length */
1670                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1671                     "asconf_process_error: included TLV too long\n");
1672                 return;
1673         }
1674         /* which error code ? */
1675         error_code = ntohs(eh->code);
1676         param_type = ntohs(aph->ph.param_type);
1677         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1678         switch (error_code) {
1679         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1680                 /* we allow ourselves to "try again" for this error */
1681                 break;
1682         default:
1683                 /* peer can't handle it... */
1684                 switch (param_type) {
1685                 case SCTP_ADD_IP_ADDRESS:
1686                 case SCTP_DEL_IP_ADDRESS:
1687                         stcb->asoc.peer_supports_asconf = 0;
1688                         break;
1689                 case SCTP_SET_PRIM_ADDR:
1690                         stcb->asoc.peer_supports_asconf = 0;
1691                         break;
1692                 default:
1693                         break;
1694                 }
1695         }
1696 }
1697
1698 /*
1699  * process an asconf queue param.
1700  * aparam: parameter to process, will be removed from the queue.
1701  * flag: 1=success case, 0=failure case
1702  */
1703 static void
1704 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1705     struct sctp_asconf_addr *aparam, uint32_t flag)
1706 {
1707         uint16_t param_type;
1708
1709         /* process this param */
1710         param_type = aparam->ap.aph.ph.param_type;
1711         switch (param_type) {
1712         case SCTP_ADD_IP_ADDRESS:
1713                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1714                     "process_param_ack: added IP address\n");
1715                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag);
1716                 break;
1717         case SCTP_DEL_IP_ADDRESS:
1718                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1719                     "process_param_ack: deleted IP address\n");
1720                 /* nothing really to do... lists already updated */
1721                 break;
1722         case SCTP_SET_PRIM_ADDR:
1723                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1724                     "process_param_ack: set primary IP address\n");
1725                 /* nothing to do... peer may start using this addr */
1726                 if (flag == 0)
1727                         stcb->asoc.peer_supports_asconf = 0;
1728                 break;
1729         default:
1730                 /* should NEVER happen */
1731                 break;
1732         }
1733
1734         /* remove the param and free it */
1735         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1736         if (aparam->ifa)
1737                 sctp_free_ifa(aparam->ifa);
1738         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1739 }
1740
1741 /*
1742  * cleanup from a bad asconf ack parameter
1743  */
1744 static void
1745 sctp_asconf_ack_clear(struct sctp_tcb *stcb)
1746 {
1747         /* assume peer doesn't really know how to do asconfs */
1748         stcb->asoc.peer_supports_asconf = 0;
1749         /* XXX we could free the pending queue here */
1750 }
1751
1752 void
1753 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1754     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1755     struct sctp_nets *net, int *abort_no_unlock)
1756 {
1757         struct sctp_association *asoc;
1758         uint32_t serial_num;
1759         uint16_t ack_length;
1760         struct sctp_asconf_paramhdr *aph;
1761         struct sctp_asconf_addr *aa, *aa_next;
1762         uint32_t last_error_id = 0;     /* last error correlation id */
1763         uint32_t id;
1764         struct sctp_asconf_addr *ap;
1765
1766         /* asconf param buffer */
1767         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1768
1769         /* verify minimum length */
1770         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1771                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1772                     "handle_asconf_ack: chunk too small = %xh\n",
1773                     ntohs(cp->ch.chunk_length));
1774                 return;
1775         }
1776         asoc = &stcb->asoc;
1777         serial_num = ntohl(cp->serial_number);
1778
1779         /*
1780          * NOTE: we may want to handle this differently- currently, we will
1781          * abort when we get an ack for the expected serial number + 1 (eg.
1782          * we didn't send it), process an ack normally if it is the expected
1783          * serial number, and re-send the previous ack for *ALL* other
1784          * serial numbers
1785          */
1786
1787         /*
1788          * if the serial number is the next expected, but I didn't send it,
1789          * abort the asoc, since someone probably just hijacked us...
1790          */
1791         if (serial_num == (asoc->asconf_seq_out + 1)) {
1792                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1793                 sctp_abort_an_association(stcb->sctp_ep, stcb,
1794                     SCTP_CAUSE_ILLEGAL_ASCONF_ACK, NULL, SCTP_SO_NOT_LOCKED);
1795                 *abort_no_unlock = 1;
1796                 return;
1797         }
1798         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1799                 /* got a duplicate/unexpected ASCONF-ACK */
1800                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1801                     serial_num, asoc->asconf_seq_out_acked + 1);
1802                 return;
1803         }
1804         if (serial_num == asoc->asconf_seq_out - 1) {
1805                 /* stop our timer */
1806                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1807                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
1808         }
1809         /* process the ASCONF-ACK contents */
1810         ack_length = ntohs(cp->ch.chunk_length) -
1811             sizeof(struct sctp_asconf_ack_chunk);
1812         offset += sizeof(struct sctp_asconf_ack_chunk);
1813         /* process through all parameters */
1814         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1815                 unsigned int param_length, param_type;
1816
1817                 /* get pointer to next asconf parameter */
1818                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1819                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1820                 if (aph == NULL) {
1821                         /* can't get an asconf paramhdr */
1822                         sctp_asconf_ack_clear(stcb);
1823                         return;
1824                 }
1825                 param_type = ntohs(aph->ph.param_type);
1826                 param_length = ntohs(aph->ph.param_length);
1827                 if (param_length > ack_length) {
1828                         sctp_asconf_ack_clear(stcb);
1829                         return;
1830                 }
1831                 if (param_length < sizeof(struct sctp_paramhdr)) {
1832                         sctp_asconf_ack_clear(stcb);
1833                         return;
1834                 }
1835                 /* get the complete parameter... */
1836                 if (param_length > sizeof(aparam_buf)) {
1837                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1838                             "param length (%u) larger than buffer size!\n", param_length);
1839                         sctp_asconf_ack_clear(stcb);
1840                         return;
1841                 }
1842                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1843                 if (aph == NULL) {
1844                         sctp_asconf_ack_clear(stcb);
1845                         return;
1846                 }
1847                 /* correlation_id is transparent to peer, no ntohl needed */
1848                 id = aph->correlation_id;
1849
1850                 switch (param_type) {
1851                 case SCTP_ERROR_CAUSE_IND:
1852                         last_error_id = id;
1853                         /* find the corresponding asconf param in our queue */
1854                         ap = sctp_asconf_find_param(stcb, id);
1855                         if (ap == NULL) {
1856                                 /* hmm... can't find this in our queue! */
1857                                 break;
1858                         }
1859                         /* process the parameter, failed flag */
1860                         sctp_asconf_process_param_ack(stcb, ap, 0);
1861                         /* process the error response */
1862                         sctp_asconf_process_error(stcb, aph);
1863                         break;
1864                 case SCTP_SUCCESS_REPORT:
1865                         /* find the corresponding asconf param in our queue */
1866                         ap = sctp_asconf_find_param(stcb, id);
1867                         if (ap == NULL) {
1868                                 /* hmm... can't find this in our queue! */
1869                                 break;
1870                         }
1871                         /* process the parameter, success flag */
1872                         sctp_asconf_process_param_ack(stcb, ap, 1);
1873                         break;
1874                 default:
1875                         break;
1876                 }               /* switch */
1877
1878                 /* update remaining ASCONF-ACK message length to process */
1879                 ack_length -= SCTP_SIZE32(param_length);
1880                 if (ack_length <= 0) {
1881                         /* no more data in the mbuf chain */
1882                         break;
1883                 }
1884                 offset += SCTP_SIZE32(param_length);
1885         }                       /* while */
1886
1887         /*
1888          * if there are any "sent" params still on the queue, these are
1889          * implicitly "success", or "failed" (if we got an error back) ...
1890          * so process these appropriately
1891          *
1892          * we assume that the correlation_id's are monotonically increasing
1893          * beginning from 1 and that we don't have *that* many outstanding
1894          * at any given time
1895          */
1896         if (last_error_id == 0)
1897                 last_error_id--;/* set to "max" value */
1898         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1899                 if (aa->sent == 1) {
1900                         /*
1901                          * implicitly successful or failed if correlation_id
1902                          * < last_error_id, then success else, failure
1903                          */
1904                         if (aa->ap.aph.correlation_id < last_error_id)
1905                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1906                         else
1907                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1908                 } else {
1909                         /*
1910                          * since we always process in order (FIFO queue) if
1911                          * we reach one that hasn't been sent, the rest
1912                          * should not have been sent either. so, we're
1913                          * done...
1914                          */
1915                         break;
1916                 }
1917         }
1918
1919         /* update the next sequence number to use */
1920         asoc->asconf_seq_out_acked++;
1921         /* remove the old ASCONF on our outbound queue */
1922         sctp_toss_old_asconf(stcb);
1923         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1924 #ifdef SCTP_TIMER_BASED_ASCONF
1925                 /* we have more params, so restart our timer */
1926                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1927                     stcb, net);
1928 #else
1929                 /* we have more params, so send out more */
1930                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1931 #endif
1932         }
1933 }
1934
1935 #ifdef INET6
1936 static uint32_t
1937 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1938 {
1939         struct sockaddr_in6 *sin6, *net6;
1940         struct sctp_nets *net;
1941
1942         if (sa->sa_family != AF_INET6) {
1943                 /* wrong family */
1944                 return (0);
1945         }
1946         sin6 = (struct sockaddr_in6 *)sa;
1947         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1948                 /* not link local address */
1949                 return (0);
1950         }
1951         /* hunt through our destination nets list for this scope_id */
1952         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1953                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1954                     AF_INET6)
1955                         continue;
1956                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1957                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1958                         continue;
1959                 if (sctp_is_same_scope(sin6, net6)) {
1960                         /* found one */
1961                         return (1);
1962                 }
1963         }
1964         /* didn't find one */
1965         return (0);
1966 }
1967
1968 #endif
1969
1970 /*
1971  * address management functions
1972  */
1973 static void
1974 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1975     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1976 {
1977         int status;
1978
1979
1980         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1981             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1982                 /* subset bound, no ASCONF allowed case, so ignore */
1983                 return;
1984         }
1985         /*
1986          * note: we know this is not the subset bound, no ASCONF case eg.
1987          * this is boundall or subset bound w/ASCONF allowed
1988          */
1989
1990         /* first, make sure it's a good address family */
1991         switch (ifa->address.sa.sa_family) {
1992 #ifdef INET6
1993         case AF_INET6:
1994                 break;
1995 #endif
1996 #ifdef INET
1997         case AF_INET:
1998                 break;
1999 #endif
2000         default:
2001                 return;
2002         }
2003 #ifdef INET6
2004         /* make sure we're "allowed" to add this type of addr */
2005         if (ifa->address.sa.sa_family == AF_INET6) {
2006                 /* invalid if we're not a v6 endpoint */
2007                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
2008                         return;
2009                 /* is the v6 addr really valid ? */
2010                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2011                         return;
2012                 }
2013         }
2014 #endif
2015         /* put this address on the "pending/do not use yet" list */
2016         sctp_add_local_addr_restricted(stcb, ifa);
2017         /*
2018          * check address scope if address is out of scope, don't queue
2019          * anything... note: this would leave the address on both inp and
2020          * asoc lists
2021          */
2022         switch (ifa->address.sa.sa_family) {
2023 #ifdef INET6
2024         case AF_INET6:
2025                 {
2026                         struct sockaddr_in6 *sin6;
2027
2028                         sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2029                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2030                                 /* we skip unspecifed addresses */
2031                                 return;
2032                         }
2033                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2034                                 if (stcb->asoc.local_scope == 0) {
2035                                         return;
2036                                 }
2037                                 /* is it the right link local scope? */
2038                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2039                                         return;
2040                                 }
2041                         }
2042                         if (stcb->asoc.site_scope == 0 &&
2043                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2044                                 return;
2045                         }
2046                         break;
2047                 }
2048 #endif
2049 #ifdef INET
2050         case AF_INET:
2051                 {
2052                         struct sockaddr_in *sin;
2053                         struct in6pcb *inp6;
2054
2055                         inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2056                         /* invalid if we are a v6 only endpoint */
2057                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2058                             SCTP_IPV6_V6ONLY(inp6))
2059                                 return;
2060
2061                         sin = (struct sockaddr_in *)&ifa->address.sa;
2062                         if (sin->sin_addr.s_addr == 0) {
2063                                 /* we skip unspecifed addresses */
2064                                 return;
2065                         }
2066                         if (stcb->asoc.ipv4_local_scope == 0 &&
2067                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2068                                 return;
2069                         }
2070                         break;
2071                 }
2072 #endif
2073         default:
2074                 /* else, not AF_INET or AF_INET6, so skip */
2075                 return;
2076         }
2077
2078         /* queue an asconf for this address add/delete */
2079         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
2080                 /* does the peer do asconf? */
2081                 if (stcb->asoc.peer_supports_asconf) {
2082                         /* queue an asconf for this addr */
2083                         status = sctp_asconf_queue_add(stcb, ifa, type);
2084
2085                         /*
2086                          * if queued ok, and in the open state, send out the
2087                          * ASCONF.  If in the non-open state, these will be
2088                          * sent when the state goes open.
2089                          */
2090                         if (status == 0 &&
2091                             SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2092 #ifdef SCTP_TIMER_BASED_ASCONF
2093                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
2094                                     stcb, stcb->asoc.primary_destination);
2095 #else
2096                                 sctp_send_asconf(stcb, NULL, addr_locked);
2097 #endif
2098                         }
2099                 }
2100         }
2101 }
2102
2103
2104 int
2105 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val)
2106 {
2107         struct sctp_asconf_iterator *asc;
2108         struct sctp_ifa *ifa;
2109         struct sctp_laddr *l;
2110         int cnt_invalid = 0;
2111
2112         asc = (struct sctp_asconf_iterator *)ptr;
2113         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2114                 ifa = l->ifa;
2115                 switch (ifa->address.sa.sa_family) {
2116 #ifdef INET6
2117                 case AF_INET6:
2118                         /* invalid if we're not a v6 endpoint */
2119                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2120                                 cnt_invalid++;
2121                                 if (asc->cnt == cnt_invalid)
2122                                         return (1);
2123                         }
2124                         break;
2125 #endif
2126 #ifdef INET
2127                 case AF_INET:
2128                         {
2129                                 /* invalid if we are a v6 only endpoint */
2130                                 struct in6pcb *inp6;
2131
2132                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2133                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2134                                     SCTP_IPV6_V6ONLY(inp6)) {
2135                                         cnt_invalid++;
2136                                         if (asc->cnt == cnt_invalid)
2137                                                 return (1);
2138                                 }
2139                                 break;
2140                         }
2141 #endif
2142                 default:
2143                         /* invalid address family */
2144                         cnt_invalid++;
2145                         if (asc->cnt == cnt_invalid)
2146                                 return (1);
2147                 }
2148         }
2149         return (0);
2150 }
2151
2152 static int
2153 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val)
2154 {
2155         struct sctp_ifa *ifa;
2156         struct sctp_asconf_iterator *asc;
2157         struct sctp_laddr *laddr, *nladdr, *l;
2158
2159         /* Only for specific case not bound all */
2160         asc = (struct sctp_asconf_iterator *)ptr;
2161         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2162                 ifa = l->ifa;
2163                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2164                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2165                             sctp_nxt_addr) {
2166                                 if (laddr->ifa == ifa) {
2167                                         laddr->action = 0;
2168                                         break;
2169                                 }
2170                         }
2171                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2172                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2173                                 /* remove only after all guys are done */
2174                                 if (laddr->ifa == ifa) {
2175                                         sctp_del_local_addr_ep(inp, ifa);
2176                                 }
2177                         }
2178                 }
2179         }
2180         return (0);
2181 }
2182
2183 void
2184 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2185     void *ptr, uint32_t val)
2186 {
2187         struct sctp_asconf_iterator *asc;
2188         struct sctp_ifa *ifa;
2189         struct sctp_laddr *l;
2190         int cnt_invalid = 0;
2191         int type, status;
2192         int num_queued = 0;
2193
2194         asc = (struct sctp_asconf_iterator *)ptr;
2195         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2196                 ifa = l->ifa;
2197                 type = l->action;
2198
2199                 /* address's vrf_id must be the vrf_id of the assoc */
2200                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2201                         continue;
2202                 }
2203                 /* Same checks again for assoc */
2204                 switch (ifa->address.sa.sa_family) {
2205 #ifdef INET6
2206                 case AF_INET6:
2207                         {
2208                                 /* invalid if we're not a v6 endpoint */
2209                                 struct sockaddr_in6 *sin6;
2210
2211                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2212                                         cnt_invalid++;
2213                                         if (asc->cnt == cnt_invalid)
2214                                                 return;
2215                                         else
2216                                                 continue;
2217                                 }
2218                                 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2219                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2220                                         /* we skip unspecifed addresses */
2221                                         continue;
2222                                 }
2223                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2224                                         if (stcb->asoc.local_scope == 0) {
2225                                                 continue;
2226                                         }
2227                                         /* is it the right link local scope? */
2228                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2229                                                 continue;
2230                                         }
2231                                 }
2232                                 break;
2233                         }
2234 #endif
2235 #ifdef INET
2236                 case AF_INET:
2237                         {
2238                                 /* invalid if we are a v6 only endpoint */
2239                                 struct in6pcb *inp6;
2240                                 struct sockaddr_in *sin;
2241
2242                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2243                                 /* invalid if we are a v6 only endpoint */
2244                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2245                                     SCTP_IPV6_V6ONLY(inp6))
2246                                         continue;
2247
2248                                 sin = (struct sockaddr_in *)&ifa->address.sa;
2249                                 if (sin->sin_addr.s_addr == 0) {
2250                                         /* we skip unspecifed addresses */
2251                                         continue;
2252                                 }
2253                                 if (stcb->asoc.ipv4_local_scope == 0 &&
2254                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2255                                         continue;
2256                                 }
2257                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2258                                     SCTP_IPV6_V6ONLY(inp6)) {
2259                                         cnt_invalid++;
2260                                         if (asc->cnt == cnt_invalid)
2261                                                 return;
2262                                         else
2263                                                 continue;
2264                                 }
2265                                 break;
2266                         }
2267 #endif
2268                 default:
2269                         /* invalid address family */
2270                         cnt_invalid++;
2271                         if (asc->cnt == cnt_invalid)
2272                                 return;
2273                         else
2274                                 continue;
2275                         break;
2276                 }
2277
2278                 if (type == SCTP_ADD_IP_ADDRESS) {
2279                         /* prevent this address from being used as a source */
2280                         sctp_add_local_addr_restricted(stcb, ifa);
2281                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2282                         struct sctp_nets *net;
2283
2284                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2285                                 sctp_rtentry_t *rt;
2286
2287                                 /* delete this address if cached */
2288                                 if (net->ro._s_addr == ifa) {
2289                                         sctp_free_ifa(net->ro._s_addr);
2290                                         net->ro._s_addr = NULL;
2291                                         net->src_addr_selected = 0;
2292                                         rt = net->ro.ro_rt;
2293                                         if (rt) {
2294                                                 RTFREE(rt);
2295                                                 net->ro.ro_rt = NULL;
2296                                         }
2297                                         /*
2298                                          * Now we deleted our src address,
2299                                          * should we not also now reset the
2300                                          * cwnd/rto to start as if its a new
2301                                          * address?
2302                                          */
2303                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2304                                         net->RTO = 0;
2305
2306                                 }
2307                         }
2308                 } else if (type == SCTP_SET_PRIM_ADDR) {
2309                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2310                                 /* must validate the ifa is in the ep */
2311                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2312                                         continue;
2313                                 }
2314                         } else {
2315                                 /* Need to check scopes for this guy */
2316                                 if (sctp_is_address_in_scope(ifa,
2317                                     stcb->asoc.ipv4_addr_legal,
2318                                     stcb->asoc.ipv6_addr_legal,
2319                                     stcb->asoc.loopback_scope,
2320                                     stcb->asoc.ipv4_local_scope,
2321                                     stcb->asoc.local_scope,
2322                                     stcb->asoc.site_scope, 0) == 0) {
2323                                         continue;
2324                                 }
2325                         }
2326                 }
2327                 /* queue an asconf for this address add/delete */
2328                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2329                     stcb->asoc.peer_supports_asconf) {
2330                         /* queue an asconf for this addr */
2331                         status = sctp_asconf_queue_add(stcb, ifa, type);
2332                         /*
2333                          * if queued ok, and in the open state, update the
2334                          * count of queued params.  If in the non-open
2335                          * state, these get sent when the assoc goes open.
2336                          */
2337                         if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2338                                 if (status >= 0) {
2339                                         num_queued++;
2340                                 }
2341                         }
2342                 }
2343         }
2344         /*
2345          * If we have queued params in the open state, send out an ASCONF.
2346          */
2347         if (num_queued > 0) {
2348                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2349         }
2350 }
2351
2352 void
2353 sctp_asconf_iterator_end(void *ptr, uint32_t val)
2354 {
2355         struct sctp_asconf_iterator *asc;
2356         struct sctp_ifa *ifa;
2357         struct sctp_laddr *l, *nl;
2358
2359         asc = (struct sctp_asconf_iterator *)ptr;
2360         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2361                 ifa = l->ifa;
2362                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2363                         /* Clear the defer use flag */
2364                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2365                 }
2366                 sctp_free_ifa(ifa);
2367                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2368                 SCTP_DECR_LADDR_COUNT();
2369         }
2370         SCTP_FREE(asc, SCTP_M_ASC_IT);
2371 }
2372
2373 /*
2374  * sa is the sockaddr to ask the peer to set primary to.
2375  * returns: 0 = completed, -1 = error
2376  */
2377 int32_t
2378 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2379 {
2380         uint32_t vrf_id;
2381         struct sctp_ifa *ifa;
2382
2383         /* find the ifa for the desired set primary */
2384         vrf_id = stcb->asoc.vrf_id;
2385         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2386         if (ifa == NULL) {
2387                 /* Invalid address */
2388                 return (-1);
2389         }
2390         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2391         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2392                 /* set primary queuing succeeded */
2393                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2394                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2395                     stcb);
2396                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2397                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2398 #ifdef SCTP_TIMER_BASED_ASCONF
2399                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2400                             stcb->sctp_ep, stcb,
2401                             stcb->asoc.primary_destination);
2402 #else
2403                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2404 #endif
2405                 }
2406         } else {
2407                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2408                     stcb);
2409                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2410                 return (-1);
2411         }
2412         return (0);
2413 }
2414
2415 void
2416 sctp_set_primary_ip_address(struct sctp_ifa *ifa)
2417 {
2418         struct sctp_inpcb *inp;
2419
2420         /* go through all our PCB's */
2421         LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
2422                 struct sctp_tcb *stcb;
2423
2424                 /* process for all associations for this endpoint */
2425                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2426                         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2427                         if (!sctp_asconf_queue_add(stcb, ifa,
2428                             SCTP_SET_PRIM_ADDR)) {
2429                                 /* set primary queuing succeeded */
2430                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ",
2431                                     stcb);
2432                                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa);
2433                                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2434 #ifdef SCTP_TIMER_BASED_ASCONF
2435                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2436                                             stcb->sctp_ep, stcb,
2437                                             stcb->asoc.primary_destination);
2438 #else
2439                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2440 #endif
2441                                 }
2442                         }
2443                 }               /* for each stcb */
2444         }                       /* for each inp */
2445 }
2446
2447 int
2448 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2449 {
2450         struct sctp_tmit_chunk *chk, *nchk;
2451         unsigned int offset, asconf_limit;
2452         struct sctp_asconf_chunk *acp;
2453         struct sctp_asconf_paramhdr *aph;
2454         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2455         struct sctp_paramhdr *ph;
2456         int add_cnt, del_cnt;
2457         uint16_t last_param_type;
2458
2459         add_cnt = del_cnt = 0;
2460         last_param_type = 0;
2461         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2462                 if (chk->data == NULL) {
2463                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2464                         continue;
2465                 }
2466                 offset = 0;
2467                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2468                 offset += sizeof(struct sctp_asconf_chunk);
2469                 asconf_limit = ntohs(acp->ch.chunk_length);
2470                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2471                 if (ph == NULL) {
2472                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2473                         continue;
2474                 }
2475                 offset += ntohs(ph->param_length);
2476
2477                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2478                 if (aph == NULL) {
2479                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2480                         continue;
2481                 }
2482                 while (aph != NULL) {
2483                         unsigned int param_length, param_type;
2484
2485                         param_type = ntohs(aph->ph.param_type);
2486                         param_length = ntohs(aph->ph.param_length);
2487                         if (offset + param_length > asconf_limit) {
2488                                 /* parameter goes beyond end of chunk! */
2489                                 break;
2490                         }
2491                         if (param_length > sizeof(aparam_buf)) {
2492                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2493                                 break;
2494                         }
2495                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2496                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2497                                 break;
2498                         }
2499                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2500                         if (aph == NULL) {
2501                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2502                                 break;
2503                         }
2504                         ph = (struct sctp_paramhdr *)(aph + 1);
2505                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2506                                 switch (param_type) {
2507                                 case SCTP_ADD_IP_ADDRESS:
2508                                         add_cnt++;
2509                                         break;
2510                                 case SCTP_DEL_IP_ADDRESS:
2511                                         del_cnt++;
2512                                         break;
2513                                 default:
2514                                         break;
2515                                 }
2516                                 last_param_type = param_type;
2517                         }
2518                         offset += SCTP_SIZE32(param_length);
2519                         if (offset >= asconf_limit) {
2520                                 /* no more data in the mbuf chain */
2521                                 break;
2522                         }
2523                         /* get pointer to next asconf param */
2524                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2525                 }
2526         }
2527
2528         /*
2529          * we want to find the sequences which consist of ADD -> DEL -> ADD
2530          * or DEL -> ADD
2531          */
2532         if (add_cnt > del_cnt ||
2533             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2534                 return 1;
2535         }
2536         return 0;
2537 }
2538
2539 static struct sockaddr *
2540 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2541 {
2542         struct sctp_vrf *vrf = NULL;
2543         struct sctp_ifn *sctp_ifn;
2544         struct sctp_ifa *sctp_ifa;
2545
2546         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2547                 SCTP_IPI_ADDR_RLOCK();
2548         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2549         if (vrf == NULL) {
2550                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2551                         SCTP_IPI_ADDR_RUNLOCK();
2552                 return (NULL);
2553         }
2554         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2555                 if (stcb->asoc.loopback_scope == 0 &&
2556                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2557                         /* Skip if loopback_scope not set */
2558                         continue;
2559                 }
2560                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2561                         switch (sctp_ifa->address.sa.sa_family) {
2562 #ifdef INET
2563                         case AF_INET:
2564                                 if (stcb->asoc.ipv4_addr_legal) {
2565                                         struct sockaddr_in *sin;
2566
2567                                         sin = (struct sockaddr_in *)&sctp_ifa->address.sa;
2568                                         if (sin->sin_addr.s_addr == 0) {
2569                                                 /* skip unspecifed addresses */
2570                                                 continue;
2571                                         }
2572                                         if (stcb->asoc.ipv4_local_scope == 0 &&
2573                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2574                                                 continue;
2575
2576                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2577                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2578                                                 continue;
2579                                         /*
2580                                          * found a valid local v4 address to
2581                                          * use
2582                                          */
2583                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2584                                                 SCTP_IPI_ADDR_RUNLOCK();
2585                                         return (&sctp_ifa->address.sa);
2586                                 }
2587                                 break;
2588 #endif
2589 #ifdef INET6
2590                         case AF_INET6:
2591                                 if (stcb->asoc.ipv6_addr_legal) {
2592                                         struct sockaddr_in6 *sin6;
2593
2594                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2595                                                 continue;
2596                                         }
2597                                         sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa;
2598                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2599                                                 /*
2600                                                  * we skip unspecifed
2601                                                  * addresses
2602                                                  */
2603                                                 continue;
2604                                         }
2605                                         if (stcb->asoc.local_scope == 0 &&
2606                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2607                                                 continue;
2608                                         if (stcb->asoc.site_scope == 0 &&
2609                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2610                                                 continue;
2611
2612                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2613                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2614                                                 continue;
2615                                         /*
2616                                          * found a valid local v6 address to
2617                                          * use
2618                                          */
2619                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2620                                                 SCTP_IPI_ADDR_RUNLOCK();
2621                                         return (&sctp_ifa->address.sa);
2622                                 }
2623                                 break;
2624 #endif
2625                         default:
2626                                 break;
2627                         }
2628                 }
2629         }
2630         /* no valid addresses found */
2631         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2632                 SCTP_IPI_ADDR_RUNLOCK();
2633         return (NULL);
2634 }
2635
2636 static struct sockaddr *
2637 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2638 {
2639         struct sctp_laddr *laddr;
2640
2641         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2642                 if (laddr->ifa == NULL) {
2643                         continue;
2644                 }
2645                 /* is the address restricted ? */
2646                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2647                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2648                         continue;
2649
2650                 /* found a valid local address to use */
2651                 return (&laddr->ifa->address.sa);
2652         }
2653         /* no valid addresses found */
2654         return (NULL);
2655 }
2656
2657 /*
2658  * builds an ASCONF chunk from queued ASCONF params.
2659  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2660  */
2661 struct mbuf *
2662 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2663 {
2664         struct mbuf *m_asconf, *m_asconf_chk;
2665         struct sctp_asconf_addr *aa;
2666         struct sctp_asconf_chunk *acp;
2667         struct sctp_asconf_paramhdr *aph;
2668         struct sctp_asconf_addr_param *aap;
2669         uint32_t p_length;
2670         uint32_t correlation_id = 1;    /* 0 is reserved... */
2671         caddr_t ptr, lookup_ptr;
2672         uint8_t lookup_used = 0;
2673
2674         /* are there any asconf params to send? */
2675         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2676                 if (aa->sent == 0)
2677                         break;
2678         }
2679         if (aa == NULL)
2680                 return (NULL);
2681
2682         /*
2683          * get a chunk header mbuf and a cluster for the asconf params since
2684          * it's simpler to fill in the asconf chunk header lookup address on
2685          * the fly
2686          */
2687         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA);
2688         if (m_asconf_chk == NULL) {
2689                 /* no mbuf's */
2690                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2691                     "compose_asconf: couldn't get chunk mbuf!\n");
2692                 return (NULL);
2693         }
2694         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
2695         if (m_asconf == NULL) {
2696                 /* no mbuf's */
2697                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2698                     "compose_asconf: couldn't get mbuf!\n");
2699                 sctp_m_freem(m_asconf_chk);
2700                 return (NULL);
2701         }
2702         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2703         SCTP_BUF_LEN(m_asconf) = 0;
2704         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2705         bzero(acp, sizeof(struct sctp_asconf_chunk));
2706         /* save pointers to lookup address and asconf params */
2707         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2708         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2709
2710         /* fill in chunk header info */
2711         acp->ch.chunk_type = SCTP_ASCONF;
2712         acp->ch.chunk_flags = 0;
2713         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2714         stcb->asoc.asconf_seq_out++;
2715
2716         /* add parameters... up to smallest MTU allowed */
2717         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2718                 if (aa->sent)
2719                         continue;
2720                 /* get the parameter length */
2721                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2722                 /* will it fit in current chunk? */
2723                 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) {
2724                         /* won't fit, so we're done with this chunk */
2725                         break;
2726                 }
2727                 /* assign (and store) a correlation id */
2728                 aa->ap.aph.correlation_id = correlation_id++;
2729
2730                 /*
2731                  * fill in address if we're doing a delete this is a simple
2732                  * way for us to fill in the correlation address, which
2733                  * should only be used by the peer if we're deleting our
2734                  * source address and adding a new address (e.g. renumbering
2735                  * case)
2736                  */
2737                 if (lookup_used == 0 &&
2738                     (aa->special_del == 0) &&
2739                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2740                         struct sctp_ipv6addr_param *lookup;
2741                         uint16_t p_size, addr_size;
2742
2743                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2744                         lookup->ph.param_type =
2745                             htons(aa->ap.addrp.ph.param_type);
2746                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2747                                 /* copy IPv6 address */
2748                                 p_size = sizeof(struct sctp_ipv6addr_param);
2749                                 addr_size = sizeof(struct in6_addr);
2750                         } else {
2751                                 /* copy IPv4 address */
2752                                 p_size = sizeof(struct sctp_ipv4addr_param);
2753                                 addr_size = sizeof(struct in_addr);
2754                         }
2755                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2756                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2757                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2758                         lookup_used = 1;
2759                 }
2760                 /* copy into current space */
2761                 memcpy(ptr, &aa->ap, p_length);
2762
2763                 /* network elements and update lengths */
2764                 aph = (struct sctp_asconf_paramhdr *)ptr;
2765                 aap = (struct sctp_asconf_addr_param *)ptr;
2766                 /* correlation_id is transparent to peer, no htonl needed */
2767                 aph->ph.param_type = htons(aph->ph.param_type);
2768                 aph->ph.param_length = htons(aph->ph.param_length);
2769                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2770                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2771
2772                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2773                 ptr += SCTP_SIZE32(p_length);
2774
2775                 /*
2776                  * these params are removed off the pending list upon
2777                  * getting an ASCONF-ACK back from the peer, just set flag
2778                  */
2779                 aa->sent = 1;
2780         }
2781         /* check to see if the lookup addr has been populated yet */
2782         if (lookup_used == 0) {
2783                 /* NOTE: if the address param is optional, can skip this... */
2784                 /* add any valid (existing) address... */
2785                 struct sctp_ipv6addr_param *lookup;
2786                 uint16_t p_size, addr_size;
2787                 struct sockaddr *found_addr;
2788                 caddr_t addr_ptr;
2789
2790                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2791                         found_addr = sctp_find_valid_localaddr(stcb,
2792                             addr_locked);
2793                 else
2794                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2795
2796                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2797                 if (found_addr != NULL) {
2798                         switch (found_addr->sa_family) {
2799 #ifdef INET6
2800                         case AF_INET6:
2801                                 /* copy IPv6 address */
2802                                 lookup->ph.param_type =
2803                                     htons(SCTP_IPV6_ADDRESS);
2804                                 p_size = sizeof(struct sctp_ipv6addr_param);
2805                                 addr_size = sizeof(struct in6_addr);
2806                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2807                                     found_addr)->sin6_addr;
2808                                 break;
2809 #endif
2810 #ifdef INET
2811                         case AF_INET:
2812                                 /* copy IPv4 address */
2813                                 lookup->ph.param_type =
2814                                     htons(SCTP_IPV4_ADDRESS);
2815                                 p_size = sizeof(struct sctp_ipv4addr_param);
2816                                 addr_size = sizeof(struct in_addr);
2817                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2818                                     found_addr)->sin_addr;
2819                                 break;
2820 #endif
2821                         default:
2822                                 p_size = 0;
2823                                 addr_size = 0;
2824                                 addr_ptr = NULL;
2825                                 break;
2826                         }
2827                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2828                         memcpy(lookup->addr, addr_ptr, addr_size);
2829                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2830                 } else {
2831                         /* uh oh... don't have any address?? */
2832                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2833                             "compose_asconf: no lookup addr!\n");
2834                         /* XXX for now, we send a IPv4 address of 0.0.0.0 */
2835                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2836                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2837                         bzero(lookup->addr, sizeof(struct in_addr));
2838                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2839                 }
2840         }
2841         /* chain it all together */
2842         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2843         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2844         acp->ch.chunk_length = ntohs(*retlen);
2845
2846         return (m_asconf_chk);
2847 }
2848
2849 /*
2850  * section to handle address changes before an association is up eg. changes
2851  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2852  */
2853
2854 /*
2855  * processes the (local) addresses in the INIT-ACK chunk
2856  */
2857 static void
2858 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2859     unsigned int offset, unsigned int length)
2860 {
2861         struct sctp_paramhdr tmp_param, *ph;
2862         uint16_t plen, ptype;
2863         struct sctp_ifa *sctp_ifa;
2864         struct sctp_ipv6addr_param addr_store;
2865
2866 #ifdef INET6
2867         struct sockaddr_in6 sin6;
2868
2869 #endif
2870 #ifdef INET
2871         struct sockaddr_in sin;
2872
2873 #endif
2874         struct sockaddr *sa;
2875         uint32_t vrf_id;
2876
2877         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2878         if (stcb == NULL)       /* Un-needed check for SA */
2879                 return;
2880
2881         /* convert to upper bound */
2882         length += offset;
2883
2884         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2885                 return;
2886         }
2887         /* init the addresses */
2888 #ifdef INET6
2889         bzero(&sin6, sizeof(sin6));
2890         sin6.sin6_family = AF_INET6;
2891         sin6.sin6_len = sizeof(sin6);
2892         sin6.sin6_port = stcb->rport;
2893 #endif
2894
2895 #ifdef INET
2896         bzero(&sin, sizeof(sin));
2897         sin.sin_family = AF_INET;
2898         sin.sin_len = sizeof(sin);
2899         sin.sin_port = stcb->rport;
2900 #endif
2901
2902         /* go through the addresses in the init-ack */
2903         ph = (struct sctp_paramhdr *)
2904             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2905             (uint8_t *) & tmp_param);
2906         while (ph != NULL) {
2907                 ptype = ntohs(ph->param_type);
2908                 plen = ntohs(ph->param_length);
2909                 switch (ptype) {
2910 #ifdef INET6
2911                 case SCTP_IPV6_ADDRESS:
2912                         {
2913                                 struct sctp_ipv6addr_param *a6p;
2914
2915                                 /* get the entire IPv6 address param */
2916                                 a6p = (struct sctp_ipv6addr_param *)
2917                                     sctp_m_getptr(m, offset,
2918                                     sizeof(struct sctp_ipv6addr_param),
2919                                     (uint8_t *) & addr_store);
2920                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2921                                     a6p == NULL) {
2922                                         return;
2923                                 }
2924                                 memcpy(&sin6.sin6_addr, a6p->addr,
2925                                     sizeof(struct in6_addr));
2926                                 sa = (struct sockaddr *)&sin6;
2927                                 break;
2928                         }
2929 #endif
2930 #ifdef INET
2931                 case SCTP_IPV4_ADDRESS:
2932                         {
2933                                 struct sctp_ipv4addr_param *a4p;
2934
2935                                 /* get the entire IPv4 address param */
2936                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2937                                     sizeof(struct sctp_ipv4addr_param),
2938                                     (uint8_t *) & addr_store);
2939                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2940                                     a4p == NULL) {
2941                                         return;
2942                                 }
2943                                 sin.sin_addr.s_addr = a4p->addr;
2944                                 sa = (struct sockaddr *)&sin;
2945                                 break;
2946                         }
2947 #endif
2948                 default:
2949                         goto next_addr;
2950                 }
2951
2952                 /* see if this address really (still) exists */
2953                 if (stcb) {
2954                         vrf_id = stcb->asoc.vrf_id;
2955                 } else {
2956                         vrf_id = SCTP_DEFAULT_VRFID;
2957                 }
2958                 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id,
2959                     SCTP_ADDR_NOT_LOCKED);
2960                 if (sctp_ifa == NULL) {
2961                         /* address doesn't exist anymore */
2962                         int status;
2963
2964                         /* are ASCONFs allowed ? */
2965                         if ((sctp_is_feature_on(stcb->sctp_ep,
2966                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2967                             stcb->asoc.peer_supports_asconf) {
2968                                 /* queue an ASCONF DEL_IP_ADDRESS */
2969                                 status = sctp_asconf_queue_sa_delete(stcb, sa);
2970                                 /*
2971                                  * if queued ok, and in correct state, send
2972                                  * out the ASCONF.
2973                                  */
2974                                 if (status == 0 &&
2975                                     SCTP_GET_STATE(&stcb->asoc) ==
2976                                     SCTP_STATE_OPEN) {
2977 #ifdef SCTP_TIMER_BASED_ASCONF
2978                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2979                                             stcb->sctp_ep, stcb,
2980                                             stcb->asoc.primary_destination);
2981 #else
2982                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2983 #endif
2984                                 }
2985                         }
2986                 }
2987 next_addr:
2988                 /*
2989                  * Sanity check:  Make sure the length isn't 0, otherwise
2990                  * we'll be stuck in this loop for a long time...
2991                  */
2992                 if (SCTP_SIZE32(plen) == 0) {
2993                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2994                             plen, ptype);
2995                         return;
2996                 }
2997                 /* get next parameter */
2998                 offset += SCTP_SIZE32(plen);
2999                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
3000                         return;
3001                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
3002                     sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
3003         }                       /* while */
3004 }
3005
3006 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
3007 /*
3008  * checks to see if a specific address is in the initack address list returns
3009  * 1 if found, 0 if not
3010  */
3011 static uint32_t
3012 sctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, uint32_t offset,
3013     uint32_t length, struct sockaddr *sa)
3014 {
3015         struct sctp_paramhdr tmp_param, *ph;
3016         uint16_t plen, ptype;
3017         struct sctp_ipv6addr_param addr_store;
3018
3019 #ifdef INET
3020         struct sockaddr_in *sin;
3021         struct sctp_ipv4addr_param *a4p;
3022
3023 #endif
3024 #ifdef INET6
3025         struct sockaddr_in6 *sin6;
3026         struct sctp_ipv6addr_param *a6p;
3027         struct sockaddr_in6 sin6_tmp;
3028
3029 #endif
3030
3031         switch (sa->sa_family) {
3032 #ifdef INET
3033         case AF_INET:
3034                 break;
3035 #endif
3036 #ifdef INET6
3037         case AF_INET6:
3038                 break;
3039 #endif
3040         default:
3041                 return (0);
3042         }
3043
3044         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
3045         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
3046         /* convert to upper bound */
3047         length += offset;
3048
3049         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
3050                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3051                     "find_initack_addr: invalid offset?\n");
3052                 return (0);
3053         }
3054         /* go through the addresses in the init-ack */
3055         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
3056             sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
3057         while (ph != NULL) {
3058                 ptype = ntohs(ph->param_type);
3059                 plen = ntohs(ph->param_length);
3060                 switch (ptype) {
3061 #ifdef INET6
3062                 case SCTP_IPV6_ADDRESS:
3063                         if (sa->sa_family == AF_INET6) {
3064                                 /* get the entire IPv6 address param */
3065                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
3066                                         break;
3067                                 }
3068                                 /* get the entire IPv6 address param */
3069                                 a6p = (struct sctp_ipv6addr_param *)
3070                                     sctp_m_getptr(m, offset,
3071                                     sizeof(struct sctp_ipv6addr_param),
3072                                     (uint8_t *) & addr_store);
3073                                 if (a6p == NULL) {
3074                                         return (0);
3075                                 }
3076                                 sin6 = (struct sockaddr_in6 *)sa;
3077                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
3078                                         /* create a copy and clear scope */
3079                                         memcpy(&sin6_tmp, sin6,
3080                                             sizeof(struct sockaddr_in6));
3081                                         sin6 = &sin6_tmp;
3082                                         in6_clearscope(&sin6->sin6_addr);
3083                                 }
3084                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
3085                                     sizeof(struct in6_addr)) == 0) {
3086                                         /* found it */
3087                                         return (1);
3088                                 }
3089                         }
3090                         break;
3091 #endif                          /* INET6 */
3092 #ifdef INET
3093                 case SCTP_IPV4_ADDRESS:
3094                         if (sa->sa_family == AF_INET) {
3095                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
3096                                         break;
3097                                 }
3098                                 /* get the entire IPv4 address param */
3099                                 a4p = (struct sctp_ipv4addr_param *)
3100                                     sctp_m_getptr(m, offset,
3101                                     sizeof(struct sctp_ipv4addr_param),
3102                                     (uint8_t *) & addr_store);
3103                                 if (a4p == NULL) {
3104                                         return (0);
3105                                 }
3106                                 sin = (struct sockaddr_in *)sa;
3107                                 if (sin->sin_addr.s_addr == a4p->addr) {
3108                                         /* found it */
3109                                         return (1);
3110                                 }
3111                         }
3112                         break;
3113 #endif
3114                 default:
3115                         break;
3116                 }
3117                 /* get next parameter */
3118                 offset += SCTP_SIZE32(plen);
3119                 if (offset + sizeof(struct sctp_paramhdr) > length) {
3120                         return (0);
3121                 }
3122                 ph = (struct sctp_paramhdr *)
3123                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
3124                     (uint8_t *) & tmp_param);
3125         }                       /* while */
3126         /* not found! */
3127         return (0);
3128 }
3129
3130 /*
3131  * makes sure that the current endpoint local addr list is consistent with
3132  * the new association (eg. subset bound, asconf allowed) adds addresses as
3133  * necessary
3134  */
3135 static void
3136 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3137     int length, struct sockaddr *init_addr)
3138 {
3139         struct sctp_laddr *laddr;
3140
3141         /* go through the endpoint list */
3142         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3143                 /* be paranoid and validate the laddr */
3144                 if (laddr->ifa == NULL) {
3145                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3146                             "check_addr_list_ep: laddr->ifa is NULL");
3147                         continue;
3148                 }
3149                 if (laddr->ifa == NULL) {
3150                         SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3151                         continue;
3152                 }
3153                 /* do i have it implicitly? */
3154                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3155                         continue;
3156                 }
3157                 /* check to see if in the init-ack */
3158                 if (!sctp_addr_in_initack(stcb, m, offset, length,
3159                     &laddr->ifa->address.sa)) {
3160                         /* try to add it */
3161                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3162                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3163                 }
3164         }
3165 }
3166
3167 /*
3168  * makes sure that the current kernel address list is consistent with the new
3169  * association (with all addrs bound) adds addresses as necessary
3170  */
3171 static void
3172 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3173     int length, struct sockaddr *init_addr,
3174     uint16_t local_scope, uint16_t site_scope,
3175     uint16_t ipv4_scope, uint16_t loopback_scope)
3176 {
3177         struct sctp_vrf *vrf = NULL;
3178         struct sctp_ifn *sctp_ifn;
3179         struct sctp_ifa *sctp_ifa;
3180         uint32_t vrf_id;
3181
3182         if (stcb) {
3183                 vrf_id = stcb->asoc.vrf_id;
3184         } else {
3185                 return;
3186         }
3187         SCTP_IPI_ADDR_RLOCK();
3188         vrf = sctp_find_vrf(vrf_id);
3189         if (vrf == NULL) {
3190                 SCTP_IPI_ADDR_RUNLOCK();
3191                 return;
3192         }
3193         /* go through all our known interfaces */
3194         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3195                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3196                         /* skip loopback interface */
3197                         continue;
3198                 }
3199                 /* go through each interface address */
3200                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3201                         /* do i have it implicitly? */
3202                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3203                                 continue;
3204                         }
3205                         /* check to see if in the init-ack */
3206                         if (!sctp_addr_in_initack(stcb, m, offset, length,
3207                             &sctp_ifa->address.sa)) {
3208                                 /* try to add it */
3209                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3210                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3211                                     SCTP_ADDR_LOCKED);
3212                         }
3213                 }               /* end foreach ifa */
3214         }                       /* end foreach ifn */
3215         SCTP_IPI_ADDR_RUNLOCK();
3216 }
3217
3218 /*
3219  * validates an init-ack chunk (from a cookie-echo) with current addresses
3220  * adds addresses from the init-ack into our local address list, if needed
3221  * queues asconf adds/deletes addresses as needed and makes appropriate list
3222  * changes for source address selection m, offset: points to the start of the
3223  * address list in an init-ack chunk length: total length of the address
3224  * params only init_addr: address where my INIT-ACK was sent from
3225  */
3226 void
3227 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3228     int length, struct sockaddr *init_addr,
3229     uint16_t local_scope, uint16_t site_scope,
3230     uint16_t ipv4_scope, uint16_t loopback_scope)
3231 {
3232         /* process the local addresses in the initack */
3233         sctp_process_initack_addresses(stcb, m, offset, length);
3234
3235         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3236                 /* bound all case */
3237                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3238                     local_scope, site_scope, ipv4_scope, loopback_scope);
3239         } else {
3240                 /* subset bound case */
3241                 if (sctp_is_feature_on(stcb->sctp_ep,
3242                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3243                         /* asconf's allowed */
3244                         sctp_check_address_list_ep(stcb, m, offset, length,
3245                             init_addr);
3246                 }
3247                 /* else, no asconfs allowed, so what we sent is what we get */
3248         }
3249 }
3250
3251 /*
3252  * sctp_bindx() support
3253  */
3254 uint32_t
3255 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3256     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3257 {
3258         struct sctp_ifa *ifa;
3259         struct sctp_laddr *laddr, *nladdr;
3260
3261         if (sa->sa_len == 0) {
3262                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3263                 return (EINVAL);
3264         }
3265         if (sctp_ifap) {
3266                 ifa = sctp_ifap;
3267         } else if (type == SCTP_ADD_IP_ADDRESS) {
3268                 /* For an add the address MUST be on the system */
3269                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3270         } else if (type == SCTP_DEL_IP_ADDRESS) {
3271                 /* For a delete we need to find it in the inp */
3272                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3273         } else {
3274                 ifa = NULL;
3275         }
3276         if (ifa != NULL) {
3277                 if (type == SCTP_ADD_IP_ADDRESS) {
3278                         sctp_add_local_addr_ep(inp, ifa, type);
3279                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3280                         if (inp->laddr_count < 2) {
3281                                 /* can't delete the last local address */
3282                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3283                                 return (EINVAL);
3284                         }
3285                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3286                             sctp_nxt_addr) {
3287                                 if (ifa == laddr->ifa) {
3288                                         /* Mark in the delete */
3289                                         laddr->action = type;
3290                                 }
3291                         }
3292                 }
3293                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3294                         /*
3295                          * There is no need to start the iterator if the inp
3296                          * has no associations.
3297                          */
3298                         if (type == SCTP_DEL_IP_ADDRESS) {
3299                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3300                                         if (laddr->ifa == ifa) {
3301                                                 sctp_del_local_addr_ep(inp, ifa);
3302                                         }
3303                                 }
3304                         }
3305                 } else {
3306                         struct sctp_asconf_iterator *asc;
3307                         struct sctp_laddr *wi;
3308
3309                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3310                             sizeof(struct sctp_asconf_iterator),
3311                             SCTP_M_ASC_IT);
3312                         if (asc == NULL) {
3313                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3314                                 return (ENOMEM);
3315                         }
3316                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3317                         if (wi == NULL) {
3318                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3319                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3320                                 return (ENOMEM);
3321                         }
3322                         LIST_INIT(&asc->list_of_work);
3323                         asc->cnt = 1;
3324                         SCTP_INCR_LADDR_COUNT();
3325                         wi->ifa = ifa;
3326                         wi->action = type;
3327                         atomic_add_int(&ifa->refcount, 1);
3328                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3329                         (void)sctp_initiate_iterator(sctp_asconf_iterator_ep,
3330                             sctp_asconf_iterator_stcb,
3331                             sctp_asconf_iterator_ep_end,
3332                             SCTP_PCB_ANY_FLAGS,
3333                             SCTP_PCB_ANY_FEATURES,
3334                             SCTP_ASOC_ANY_STATE,
3335                             (void *)asc, 0,
3336                             sctp_asconf_iterator_end, inp, 0);
3337                 }
3338                 return (0);
3339         } else {
3340                 /* invalid address! */
3341                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3342                 return (EADDRNOTAVAIL);
3343         }
3344 }
3345
3346 void
3347 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3348     struct sctp_nets *net)
3349 {
3350         struct sctp_asconf_addr *aa;
3351         struct sctp_ifa *sctp_ifap;
3352         struct sctp_asconf_tag_param *vtag;
3353
3354 #ifdef INET
3355         struct sockaddr_in *to;
3356
3357 #endif
3358 #ifdef INET6
3359         struct sockaddr_in6 *to6;
3360
3361 #endif
3362         if (net == NULL) {
3363                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3364                 return;
3365         }
3366         if (stcb == NULL) {
3367                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3368                 return;
3369         }
3370         /*
3371          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3372          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3373          */
3374         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3375             SCTP_M_ASC_ADDR);
3376         if (aa == NULL) {
3377                 /* didn't get memory */
3378                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3379                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3380                 return;
3381         }
3382         aa->special_del = 0;
3383         /* fill in asconf address parameter fields */
3384         /* top level elements are "networked" during send */
3385         aa->ifa = NULL;
3386         aa->sent = 0;           /* clear sent flag */
3387         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3388         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3389         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3390         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3391         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3392         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3393
3394         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3395             SCTP_M_ASC_ADDR);
3396         if (aa == NULL) {
3397                 /* didn't get memory */
3398                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3399                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3400                 return;
3401         }
3402         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3403         /* fill in asconf address parameter fields */
3404         /* ADD(0.0.0.0) */
3405         switch (net->ro._l_addr.sa.sa_family) {
3406 #ifdef INET
3407         case AF_INET:
3408                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3409                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3410                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3411                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3412                 /* No need to add an address, we are using 0.0.0.0 */
3413                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3414                 break;
3415 #endif
3416 #ifdef INET6
3417         case AF_INET6:
3418                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3419                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3420                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3421                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3422                 /* No need to add an address, we are using 0.0.0.0 */
3423                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3424                 break;
3425 #endif
3426         }
3427         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3428             SCTP_M_ASC_ADDR);
3429         if (aa == NULL) {
3430                 /* didn't get memory */
3431                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3432                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3433                 return;
3434         }
3435         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3436         /* fill in asconf address parameter fields */
3437         /* ADD(0.0.0.0) */
3438         switch (net->ro._l_addr.sa.sa_family) {
3439 #ifdef INET
3440         case AF_INET:
3441                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3442                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3443                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3444                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3445                 /* No need to add an address, we are using 0.0.0.0 */
3446                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3447                 break;
3448 #endif
3449 #ifdef INET6
3450         case AF_INET6:
3451                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3452                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3453                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3454                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3455                 /* No need to add an address, we are using 0.0.0.0 */
3456                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3457                 break;
3458 #endif
3459         }
3460         /* Now we must hunt the addresses and add all global addresses */
3461         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3462                 struct sctp_vrf *vrf = NULL;
3463                 struct sctp_ifn *sctp_ifnp;
3464                 uint32_t vrf_id;
3465
3466                 vrf_id = stcb->sctp_ep->def_vrf_id;
3467                 vrf = sctp_find_vrf(vrf_id);
3468                 if (vrf == NULL) {
3469                         goto skip_rest;
3470                 }
3471                 SCTP_IPI_ADDR_RLOCK();
3472                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3473                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3474                                 switch (sctp_ifap->address.sa.sa_family) {
3475 #ifdef INET
3476                                 case AF_INET:
3477                                         to = &sctp_ifap->address.sin;
3478                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3479                                                 continue;
3480                                         }
3481                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3482                                                 continue;
3483                                         }
3484                                         break;
3485 #endif
3486 #ifdef INET6
3487                                 case AF_INET6:
3488                                         to6 = &sctp_ifap->address.sin6;
3489                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3490                                                 continue;
3491                                         }
3492                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3493                                                 continue;
3494                                         }
3495                                         break;
3496 #endif
3497                                 default:
3498                                         continue;
3499                                 }
3500                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3501                         }
3502                 }
3503                 SCTP_IPI_ADDR_RUNLOCK();
3504         } else {
3505                 struct sctp_laddr *laddr;
3506
3507                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3508                         if (laddr->ifa == NULL) {
3509                                 continue;
3510                         }
3511                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3512                                 /*
3513                                  * Address being deleted by the system, dont
3514                                  * list.
3515                                  */
3516                                 continue;
3517                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3518                                 /*
3519                                  * Address being deleted on this ep don't
3520                                  * list.
3521                                  */
3522                                 continue;
3523                         }
3524                         sctp_ifap = laddr->ifa;
3525                         switch (sctp_ifap->address.sa.sa_family) {
3526 #ifdef INET
3527                         case AF_INET:
3528                                 to = &sctp_ifap->address.sin;
3529                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3530                                         continue;
3531                                 }
3532                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3533                                         continue;
3534                                 }
3535                                 break;
3536 #endif
3537 #ifdef INET6
3538                         case AF_INET6:
3539                                 to6 = &sctp_ifap->address.sin6;
3540                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3541                                         continue;
3542                                 }
3543                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3544                                         continue;
3545                                 }
3546                                 break;
3547 #endif
3548                         default:
3549                                 continue;
3550                         }
3551                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3552                 }
3553         }
3554 skip_rest:
3555         /* Now we must send the asconf into the queue */
3556         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3557 }