sys/netinet/sctp_asconf.c

   1 /*-
   2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <netinet/sctp_var.h>
  38 #include <netinet/sctp_sysctl.h>
  39 #include <netinet/sctp_pcb.h>
  40 #include <netinet/sctp_header.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp_output.h>
  43 #include <netinet/sctp_asconf.h>
  44 #include <netinet/sctp_timer.h>
  45
  46 /*
  47  * debug flags:
  48  * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
  49  * SCTP_DEBUG_ASCONF2: detailed info
  50  */
  51
  52
  53 /*
  54  * RFC 5061
  55  *
  56  * An ASCONF parameter queue exists per asoc which holds the pending address
  57  * operations.  Lists are updated upon receipt of ASCONF-ACK.
  58  *
  59  * A restricted_addrs list exists per assoc to hold local addresses that are
  60  * not (yet) usable by the assoc as a source address.  These addresses are
  61  * either pending an ASCONF operation (and exist on the ASCONF parameter
  62  * queue), or they are permanently restricted (the peer has returned an
  63  * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
  64  *
  65  * Deleted addresses are always immediately removed from the lists as they will
  66  * (shortly) no longer exist in the kernel.  We send ASCONFs as a courtesy,
  67  * only if allowed.
  68  */
  69
  70 /*
  71  * ASCONF parameter processing.
  72  * response_required: set if a reply is required (eg. SUCCESS_REPORT).
  73  * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
  74  * FIX: allocating this many mbufs on the fly is pretty inefficient...
  75  */
  76 static struct mbuf *
  77 sctp_asconf_success_response(uint32_t id)
  78 {
  79         struct mbuf *m_reply = NULL;
  80         struct sctp_asconf_paramhdr *aph;
  81
  82         m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
  83             0, M_DONTWAIT, 1, MT_DATA);
  84         if (m_reply == NULL) {
  85                 SCTPDBG(SCTP_DEBUG_ASCONF1,
  86                     "asconf_success_response: couldn't get mbuf!\n");
  87                 return (NULL);
  88         }
  89         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
  90         aph->correlation_id = id;
  91         aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
  92         aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
  93         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
  94         aph->ph.param_length = htons(aph->ph.param_length);
  95
  96         return (m_reply);
  97 }
  98
  99 static struct mbuf *
 100 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv,
 101     uint16_t tlv_length)
 102 {
 103         struct mbuf *m_reply = NULL;
 104         struct sctp_asconf_paramhdr *aph;
 105         struct sctp_error_cause *error;
 106         uint8_t *tlv;
 107
 108         m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) +
 109             tlv_length +
 110             sizeof(struct sctp_error_cause)),
 111             0, M_DONTWAIT, 1, MT_DATA);
 112         if (m_reply == NULL) {
 113                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 114                     "asconf_error_response: couldn't get mbuf!\n");
 115                 return (NULL);
 116         }
 117         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 118         error = (struct sctp_error_cause *)(aph + 1);
 119
 120         aph->correlation_id = id;
 121         aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
 122         error->code = htons(cause);
 123         error->length = tlv_length + sizeof(struct sctp_error_cause);
 124         aph->ph.param_length = error->length +
 125             sizeof(struct sctp_asconf_paramhdr);
 126
 127         if (aph->ph.param_length > MLEN) {
 128                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 129                     "asconf_error_response: tlv_length (%xh) too big\n",
 130                     tlv_length);
 131                 sctp_m_freem(m_reply);  /* discard */
 132                 return (NULL);
 133         }
 134         if (error_tlv != NULL) {
 135                 tlv = (uint8_t *) (error + 1);
 136                 memcpy(tlv, error_tlv, tlv_length);
 137         }
 138         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 139         error->length = htons(error->length);
 140         aph->ph.param_length = htons(aph->ph.param_length);
 141
 142         return (m_reply);
 143 }
 144
 145 static struct mbuf *
 146 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph,
 147     struct sctp_tcb *stcb, int send_hb, int response_required)
 148 {
 149         struct sctp_nets *net;
 150         struct mbuf *m_reply = NULL;
 151         struct sockaddr_storage sa_store;
 152         struct sctp_paramhdr *ph;
 153         uint16_t param_type, aparam_length;
 154
 155 #if defined(INET) || defined(INET6)
 156         uint16_t param_length;
 157
 158 #endif
 159         struct sockaddr *sa;
 160         int zero_address = 0;
 161         int bad_address = 0;
 162
 163 #ifdef INET
 164         struct sockaddr_in *sin;
 165         struct sctp_ipv4addr_param *v4addr;
 166
 167 #endif
 168 #ifdef INET6
 169         struct sockaddr_in6 *sin6;
 170         struct sctp_ipv6addr_param *v6addr;
 171
 172 #endif
 173
 174         aparam_length = ntohs(aph->ph.param_length);
 175         ph = (struct sctp_paramhdr *)(aph + 1);
 176         param_type = ntohs(ph->param_type);
 177 #if defined(INET) || defined(INET6)
 178         param_length = ntohs(ph->param_length);
 179 #endif
 180         sa = (struct sockaddr *)&sa_store;
 181         switch (param_type) {
 182 #ifdef INET
 183         case SCTP_IPV4_ADDRESS:
 184                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 185                         /* invalid param size */
 186                         return (NULL);
 187                 }
 188                 v4addr = (struct sctp_ipv4addr_param *)ph;
 189                 sin = (struct sockaddr_in *)&sa_store;
 190                 bzero(sin, sizeof(*sin));
 191                 sin->sin_family = AF_INET;
 192                 sin->sin_len = sizeof(struct sockaddr_in);
 193                 sin->sin_port = stcb->rport;
 194                 sin->sin_addr.s_addr = v4addr->addr;
 195                 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 196                     IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 197                         bad_address = 1;
 198                 }
 199                 if (sin->sin_addr.s_addr == INADDR_ANY)
 200                         zero_address = 1;
 201                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 202                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 203                 break;
 204 #endif
 205 #ifdef INET6
 206         case SCTP_IPV6_ADDRESS:
 207                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 208                         /* invalid param size */
 209                         return (NULL);
 210                 }
 211                 v6addr = (struct sctp_ipv6addr_param *)ph;
 212                 sin6 = (struct sockaddr_in6 *)&sa_store;
 213                 bzero(sin6, sizeof(*sin6));
 214                 sin6->sin6_family = AF_INET6;
 215                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 216                 sin6->sin6_port = stcb->rport;
 217                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 218                     sizeof(struct in6_addr));
 219                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 220                         bad_address = 1;
 221                 }
 222                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 223                         zero_address = 1;
 224                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 225                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 226                 break;
 227 #endif
 228         default:
 229                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 230                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph,
 231                     aparam_length);
 232                 return (m_reply);
 233         }                       /* end switch */
 234
 235         /* if 0.0.0.0/::0, add the source address instead */
 236         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 237                 sa = src;
 238                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 239                     "process_asconf_add_ip: using source addr ");
 240                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 241         }
 242         /* add the address */
 243         if (bad_address) {
 244                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 245                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph,
 246                     aparam_length);
 247         } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE,
 248             SCTP_ADDR_DYNAMIC_ADDED) != 0) {
 249                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 250                     "process_asconf_add_ip: error adding address\n");
 251                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 252                     SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph,
 253                     aparam_length);
 254         } else {
 255                 /* notify upper layer */
 256                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 257                 if (response_required) {
 258                         m_reply =
 259                             sctp_asconf_success_response(aph->correlation_id);
 260                 }
 261                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
 262                 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
 263                     stcb, net);
 264                 if (send_hb) {
 265                         sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 266                 }
 267         }
 268         return (m_reply);
 269 }
 270
 271 static int
 272 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
 273 {
 274         struct sctp_nets *src_net, *net;
 275
 276         /* make sure the source address exists as a destination net */
 277         src_net = sctp_findnet(stcb, src);
 278         if (src_net == NULL) {
 279                 /* not found */
 280                 return (-1);
 281         }
 282         /* delete all destination addresses except the source */
 283         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 284                 if (net != src_net) {
 285                         /* delete this address */
 286                         sctp_remove_net(stcb, net);
 287                         SCTPDBG(SCTP_DEBUG_ASCONF1,
 288                             "asconf_del_remote_addrs_except: deleting ");
 289                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
 290                             (struct sockaddr *)&net->ro._l_addr);
 291                         /* notify upper layer */
 292                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
 293                             (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
 294                 }
 295         }
 296         return (0);
 297 }
 298
 299 static struct mbuf *
 300 sctp_process_asconf_delete_ip(struct sockaddr *src,
 301     struct sctp_asconf_paramhdr *aph,
 302     struct sctp_tcb *stcb, int response_required)
 303 {
 304         struct mbuf *m_reply = NULL;
 305         struct sockaddr_storage sa_store;
 306         struct sctp_paramhdr *ph;
 307         uint16_t param_type, aparam_length;
 308
 309 #if defined(INET) || defined(INET6)
 310         uint16_t param_length;
 311
 312 #endif
 313         struct sockaddr *sa;
 314         int zero_address = 0;
 315         int result;
 316
 317 #ifdef INET
 318         struct sockaddr_in *sin;
 319         struct sctp_ipv4addr_param *v4addr;
 320
 321 #endif
 322 #ifdef INET6
 323         struct sockaddr_in6 *sin6;
 324         struct sctp_ipv6addr_param *v6addr;
 325
 326 #endif
 327
 328         aparam_length = ntohs(aph->ph.param_length);
 329         ph = (struct sctp_paramhdr *)(aph + 1);
 330         param_type = ntohs(ph->param_type);
 331 #if defined(INET) || defined(INET6)
 332         param_length = ntohs(ph->param_length);
 333 #endif
 334         sa = (struct sockaddr *)&sa_store;
 335         switch (param_type) {
 336 #ifdef INET
 337         case SCTP_IPV4_ADDRESS:
 338                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 339                         /* invalid param size */
 340                         return (NULL);
 341                 }
 342                 v4addr = (struct sctp_ipv4addr_param *)ph;
 343                 sin = (struct sockaddr_in *)&sa_store;
 344                 bzero(sin, sizeof(*sin));
 345                 sin->sin_family = AF_INET;
 346                 sin->sin_len = sizeof(struct sockaddr_in);
 347                 sin->sin_port = stcb->rport;
 348                 sin->sin_addr.s_addr = v4addr->addr;
 349                 if (sin->sin_addr.s_addr == INADDR_ANY)
 350                         zero_address = 1;
 351                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 352                     "process_asconf_delete_ip: deleting ");
 353                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 354                 break;
 355 #endif
 356 #ifdef INET6
 357         case SCTP_IPV6_ADDRESS:
 358                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 359                         /* invalid param size */
 360                         return (NULL);
 361                 }
 362                 v6addr = (struct sctp_ipv6addr_param *)ph;
 363                 sin6 = (struct sockaddr_in6 *)&sa_store;
 364                 bzero(sin6, sizeof(*sin6));
 365                 sin6->sin6_family = AF_INET6;
 366                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 367                 sin6->sin6_port = stcb->rport;
 368                 memcpy(&sin6->sin6_addr, v6addr->addr,
 369                     sizeof(struct in6_addr));
 370                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 371                         zero_address = 1;
 372                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 373                     "process_asconf_delete_ip: deleting ");
 374                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 375                 break;
 376 #endif
 377         default:
 378                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 379                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 380                     aparam_length);
 381                 return (m_reply);
 382         }
 383
 384         /* make sure the source address is not being deleted */
 385         if (sctp_cmpaddr(sa, src)) {
 386                 /* trying to delete the source address! */
 387                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
 388                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 389                     SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph,
 390                     aparam_length);
 391                 return (m_reply);
 392         }
 393         /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
 394         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 395                 result = sctp_asconf_del_remote_addrs_except(stcb, src);
 396
 397                 if (result) {
 398                         /* src address did not exist? */
 399                         SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
 400                         /* what error to reply with?? */
 401                         m_reply =
 402                             sctp_asconf_error_response(aph->correlation_id,
 403                             SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph,
 404                             aparam_length);
 405                 } else if (response_required) {
 406                         m_reply =
 407                             sctp_asconf_success_response(aph->correlation_id);
 408                 }
 409                 return (m_reply);
 410         }
 411         /* delete the address */
 412         result = sctp_del_remote_addr(stcb, sa);
 413         /*
 414          * note if result == -2, the address doesn't exist in the asoc but
 415          * since it's being deleted anyways, we just ack the delete -- but
 416          * this probably means something has already gone awry
 417          */
 418         if (result == -1) {
 419                 /* only one address in the asoc */
 420                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
 421                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 422                     SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph,
 423                     aparam_length);
 424         } else {
 425                 if (response_required) {
 426                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 427                 }
 428                 /* notify upper layer */
 429                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 430         }
 431         return (m_reply);
 432 }
 433
 434 static struct mbuf *
 435 sctp_process_asconf_set_primary(struct sockaddr *src,
 436     struct sctp_asconf_paramhdr *aph,
 437     struct sctp_tcb *stcb, int response_required)
 438 {
 439         struct mbuf *m_reply = NULL;
 440         struct sockaddr_storage sa_store;
 441         struct sctp_paramhdr *ph;
 442         uint16_t param_type, aparam_length;
 443
 444 #if defined(INET) || defined(INET6)
 445         uint16_t param_length;
 446
 447 #endif
 448         struct sockaddr *sa;
 449         int zero_address = 0;
 450
 451 #ifdef INET
 452         struct sockaddr_in *sin;
 453         struct sctp_ipv4addr_param *v4addr;
 454
 455 #endif
 456 #ifdef INET6
 457         struct sockaddr_in6 *sin6;
 458         struct sctp_ipv6addr_param *v6addr;
 459
 460 #endif
 461
 462         aparam_length = ntohs(aph->ph.param_length);
 463         ph = (struct sctp_paramhdr *)(aph + 1);
 464         param_type = ntohs(ph->param_type);
 465 #if defined(INET) || defined(INET6)
 466         param_length = ntohs(ph->param_length);
 467 #endif
 468         sa = (struct sockaddr *)&sa_store;
 469         switch (param_type) {
 470 #ifdef INET
 471         case SCTP_IPV4_ADDRESS:
 472                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 473                         /* invalid param size */
 474                         return (NULL);
 475                 }
 476                 v4addr = (struct sctp_ipv4addr_param *)ph;
 477                 sin = (struct sockaddr_in *)&sa_store;
 478                 bzero(sin, sizeof(*sin));
 479                 sin->sin_family = AF_INET;
 480                 sin->sin_len = sizeof(struct sockaddr_in);
 481                 sin->sin_addr.s_addr = v4addr->addr;
 482                 if (sin->sin_addr.s_addr == INADDR_ANY)
 483                         zero_address = 1;
 484                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 485                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 486                 break;
 487 #endif
 488 #ifdef INET6
 489         case SCTP_IPV6_ADDRESS:
 490                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 491                         /* invalid param size */
 492                         return (NULL);
 493                 }
 494                 v6addr = (struct sctp_ipv6addr_param *)ph;
 495                 sin6 = (struct sockaddr_in6 *)&sa_store;
 496                 bzero(sin6, sizeof(*sin6));
 497                 sin6->sin6_family = AF_INET6;
 498                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 499                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 500                     sizeof(struct in6_addr));
 501                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 502                         zero_address = 1;
 503                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 504                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 505                 break;
 506 #endif
 507         default:
 508                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 509                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 510                     aparam_length);
 511                 return (m_reply);
 512         }
 513
 514         /* if 0.0.0.0/::0, use the source address instead */
 515         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 516                 sa = src;
 517                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 518                     "process_asconf_set_primary: using source addr ");
 519                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 520         }
 521         /* set the primary address */
 522         if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
 523                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 524                     "process_asconf_set_primary: primary address set\n");
 525                 /* notify upper layer */
 526                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 527                 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) &&
 528                     (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) &&
 529                     (stcb->asoc.alternate)) {
 530                         sctp_free_remote_addr(stcb->asoc.alternate);
 531                         stcb->asoc.alternate = NULL;
 532                 }
 533                 if (response_required) {
 534                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 535                 }
 536                 /*
 537                  * Mobility adaptation. Ideally, when the reception of SET
 538                  * PRIMARY with DELETE IP ADDRESS of the previous primary
 539                  * destination, unacknowledged DATA are retransmitted
 540                  * immediately to the new primary destination for seamless
 541                  * handover. If the destination is UNCONFIRMED and marked to
 542                  * REQ_PRIM, The retransmission occur when reception of the
 543                  * HEARTBEAT-ACK.  (See sctp_handle_heartbeat_ack in
 544                  * sctp_input.c) Also, when change of the primary
 545                  * destination, it is better that all subsequent new DATA
 546                  * containing already queued DATA are transmitted to the new
 547                  * primary destination. (by micchie)
 548                  */
 549                 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
 550                     SCTP_MOBILITY_BASE) ||
 551                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 552                     SCTP_MOBILITY_FASTHANDOFF)) &&
 553                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 554                     SCTP_MOBILITY_PRIM_DELETED) &&
 555                     (stcb->asoc.primary_destination->dest_state &
 556                     SCTP_ADDR_UNCONFIRMED) == 0) {
 557
 558                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7);
 559                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 560                             SCTP_MOBILITY_FASTHANDOFF)) {
 561                                 sctp_assoc_immediate_retrans(stcb,
 562                                     stcb->asoc.primary_destination);
 563                         }
 564                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 565                             SCTP_MOBILITY_BASE)) {
 566                                 sctp_move_chunks_from_net(stcb,
 567                                     stcb->asoc.deleted_primary);
 568                         }
 569                         sctp_delete_prim_timer(stcb->sctp_ep, stcb,
 570                             stcb->asoc.deleted_primary);
 571                 }
 572         } else {
 573                 /* couldn't set the requested primary address! */
 574                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 575                     "process_asconf_set_primary: set primary failed!\n");
 576                 /* must have been an invalid address, so report */
 577                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 578                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 579                     aparam_length);
 580         }
 581
 582         return (m_reply);
 583 }
 584
 585 /*
 586  * handles an ASCONF chunk.
 587  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 588  */
 589 void
 590 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 591     struct sockaddr *src,
 592     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 593     int first)
 594 {
 595         struct sctp_association *asoc;
 596         uint32_t serial_num;
 597         struct mbuf *n, *m_ack, *m_result, *m_tail;
 598         struct sctp_asconf_ack_chunk *ack_cp;
 599         struct sctp_asconf_paramhdr *aph, *ack_aph;
 600         struct sctp_ipv6addr_param *p_addr;
 601         unsigned int asconf_limit, cnt;
 602         int error = 0;          /* did an error occur? */
 603
 604         /* asconf param buffer */
 605         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 606         struct sctp_asconf_ack *ack, *ack_next;
 607
 608         /* verify minimum length */
 609         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 610                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 611                     "handle_asconf: chunk too small = %xh\n",
 612                     ntohs(cp->ch.chunk_length));
 613                 return;
 614         }
 615         asoc = &stcb->asoc;
 616         serial_num = ntohl(cp->serial_number);
 617
 618         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 619                 /* got a duplicate ASCONF */
 620                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 621                     "handle_asconf: got duplicate serial number = %xh\n",
 622                     serial_num);
 623                 return;
 624         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 625                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 626                     serial_num, asoc->asconf_seq_in + 1);
 627                 return;
 628         }
 629         /* it's the expected "next" sequence number, so process it */
 630         asoc->asconf_seq_in = serial_num;       /* update sequence */
 631         /* get length of all the param's in the ASCONF */
 632         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 633         SCTPDBG(SCTP_DEBUG_ASCONF1,
 634             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 635             asconf_limit, serial_num);
 636
 637         if (first) {
 638                 /* delete old cache */
 639                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 640
 641                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 642                         if (ack->serial_number == serial_num)
 643                                 break;
 644                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 645                             ack->serial_number, serial_num);
 646                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 647                         if (ack->data != NULL) {
 648                                 sctp_m_freem(ack->data);
 649                         }
 650                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 651                 }
 652         }
 653         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 654             M_DONTWAIT, 1, MT_DATA);
 655         if (m_ack == NULL) {
 656                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 657                     "handle_asconf: couldn't get mbuf!\n");
 658                 return;
 659         }
 660         m_tail = m_ack;         /* current reply chain's tail */
 661
 662         /* fill in ASCONF-ACK header */
 663         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 664         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 665         ack_cp->ch.chunk_flags = 0;
 666         ack_cp->serial_number = htonl(serial_num);
 667         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 668         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 669         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 670
 671         /* skip the lookup address parameter */
 672         offset += sizeof(struct sctp_asconf_chunk);
 673         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf);
 674         if (p_addr == NULL) {
 675                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 676                     "handle_asconf: couldn't get lookup addr!\n");
 677                 /* respond with a missing/invalid mandatory parameter error */
 678                 return;
 679         }
 680         /* param_length is already validated in process_control... */
 681         offset += ntohs(p_addr->ph.param_length);       /* skip lookup addr */
 682
 683         /* get pointer to first asconf param in ASCONF-ACK */
 684         ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk));
 685         if (ack_aph == NULL) {
 686                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n");
 687                 return;
 688         }
 689         /* get pointer to first asconf param in ASCONF */
 690         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf);
 691         if (aph == NULL) {
 692                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 693                 goto send_reply;
 694         }
 695         /* process through all parameters */
 696         cnt = 0;
 697         while (aph != NULL) {
 698                 unsigned int param_length, param_type;
 699
 700                 param_type = ntohs(aph->ph.param_type);
 701                 param_length = ntohs(aph->ph.param_length);
 702                 if (offset + param_length > asconf_limit) {
 703                         /* parameter goes beyond end of chunk! */
 704                         sctp_m_freem(m_ack);
 705                         return;
 706                 }
 707                 m_result = NULL;
 708
 709                 if (param_length > sizeof(aparam_buf)) {
 710                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 711                         sctp_m_freem(m_ack);
 712                         return;
 713                 }
 714                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 715                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 716                         sctp_m_freem(m_ack);
 717                 }
 718                 /* get the entire parameter */
 719                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 720                 if (aph == NULL) {
 721                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 722                         sctp_m_freem(m_ack);
 723                         return;
 724                 }
 725                 switch (param_type) {
 726                 case SCTP_ADD_IP_ADDRESS:
 727                         asoc->peer_supports_asconf = 1;
 728                         m_result = sctp_process_asconf_add_ip(src, aph, stcb,
 729                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 730                         cnt++;
 731                         break;
 732                 case SCTP_DEL_IP_ADDRESS:
 733                         asoc->peer_supports_asconf = 1;
 734                         m_result = sctp_process_asconf_delete_ip(src, aph, stcb,
 735                             error);
 736                         break;
 737                 case SCTP_ERROR_CAUSE_IND:
 738                         /* not valid in an ASCONF chunk */
 739                         break;
 740                 case SCTP_SET_PRIM_ADDR:
 741                         asoc->peer_supports_asconf = 1;
 742                         m_result = sctp_process_asconf_set_primary(src, aph,
 743                             stcb, error);
 744                         break;
 745                 case SCTP_NAT_VTAGS:
 746                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 747                         break;
 748                 case SCTP_SUCCESS_REPORT:
 749                         /* not valid in an ASCONF chunk */
 750                         break;
 751                 case SCTP_ULP_ADAPTATION:
 752                         /* FIX */
 753                         break;
 754                 default:
 755                         if ((param_type & 0x8000) == 0) {
 756                                 /* Been told to STOP at this param */
 757                                 asconf_limit = offset;
 758                                 /*
 759                                  * FIX FIX - We need to call
 760                                  * sctp_arethere_unrecognized_parameters()
 761                                  * to get a operr and send it for any
 762                                  * param's with the 0x4000 bit set OR do it
 763                                  * here ourselves... note we still must STOP
 764                                  * if the 0x8000 bit is clear.
 765                                  */
 766                         }
 767                         /* unknown/invalid param type */
 768                         break;
 769                 }               /* switch */
 770
 771                 /* add any (error) result to the reply mbuf chain */
 772                 if (m_result != NULL) {
 773                         SCTP_BUF_NEXT(m_tail) = m_result;
 774                         m_tail = m_result;
 775                         /* update lengths, make sure it's aligned too */
 776                         SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result));
 777                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 778                         /* set flag to force success reports */
 779                         error = 1;
 780                 }
 781                 offset += SCTP_SIZE32(param_length);
 782                 /* update remaining ASCONF message length to process */
 783                 if (offset >= asconf_limit) {
 784                         /* no more data in the mbuf chain */
 785                         break;
 786                 }
 787                 /* get pointer to next asconf param */
 788                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 789                     sizeof(struct sctp_asconf_paramhdr),
 790                     (uint8_t *) & aparam_buf);
 791                 if (aph == NULL) {
 792                         /* can't get an asconf paramhdr */
 793                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 794                         /* FIX ME - add error here... */
 795                 }
 796         }
 797
 798 send_reply:
 799         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 800         /* save the ASCONF-ACK reply */
 801         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 802             struct sctp_asconf_ack);
 803         if (ack == NULL) {
 804                 sctp_m_freem(m_ack);
 805                 return;
 806         }
 807         ack->serial_number = serial_num;
 808         ack->last_sent_to = NULL;
 809         ack->data = m_ack;
 810         ack->len = 0;
 811         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 812                 ack->len += SCTP_BUF_LEN(n);
 813         }
 814         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 815
 816         /* see if last_control_chunk_from is set properly (use IP src addr) */
 817         if (stcb->asoc.last_control_chunk_from == NULL) {
 818                 /*
 819                  * this could happen if the source address was just newly
 820                  * added
 821                  */
 822                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 823                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 824                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 825                 /* look up the from address */
 826                 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src);
 827 #ifdef SCTP_DEBUG
 828                 if (stcb->asoc.last_control_chunk_from == NULL) {
 829                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 830                 }
 831 #endif
 832         }
 833 }
 834
 835 /*
 836  * does the address match? returns 0 if not, 1 if so
 837  */
 838 static uint32_t
 839 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 840 {
 841         switch (sa->sa_family) {
 842 #ifdef INET6
 843         case AF_INET6:
 844                 {
 845                         /* XXX scopeid */
 846                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 847
 848                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 849                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 850                             sizeof(struct in6_addr)) == 0)) {
 851                                 return (1);
 852                         }
 853                         break;
 854                 }
 855 #endif
 856 #ifdef INET
 857         case AF_INET:
 858                 {
 859                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 860
 861                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 862                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 863                             sizeof(struct in_addr)) == 0)) {
 864                                 return (1);
 865                         }
 866                         break;
 867                 }
 868 #endif
 869         default:
 870                 break;
 871         }
 872         return (0);
 873 }
 874
 875 /*
 876  * does the address match? returns 0 if not, 1 if so
 877  */
 878 static uint32_t
 879 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 880 {
 881 #if defined(INET) || defined(INET6)
 882         uint16_t param_type, param_length;
 883
 884         param_type = ntohs(ph->param_type);
 885         param_length = ntohs(ph->param_length);
 886 #endif
 887         switch (sa->sa_family) {
 888 #ifdef INET6
 889         case AF_INET6:
 890                 {
 891                         /* XXX scopeid */
 892                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 893                         struct sctp_ipv6addr_param *v6addr;
 894
 895                         v6addr = (struct sctp_ipv6addr_param *)ph;
 896                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 897                             (param_length == sizeof(struct sctp_ipv6addr_param)) &&
 898                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 899                             sizeof(struct in6_addr)) == 0)) {
 900                                 return (1);
 901                         }
 902                         break;
 903                 }
 904 #endif
 905 #ifdef INET
 906         case AF_INET:
 907                 {
 908                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 909                         struct sctp_ipv4addr_param *v4addr;
 910
 911                         v4addr = (struct sctp_ipv4addr_param *)ph;
 912                         if ((param_type == SCTP_IPV4_ADDRESS) &&
 913                             (param_length == sizeof(struct sctp_ipv4addr_param)) &&
 914                             (memcmp(&v4addr->addr, &sin->sin_addr,
 915                             sizeof(struct in_addr)) == 0)) {
 916                                 return (1);
 917                         }
 918                         break;
 919                 }
 920 #endif
 921         default:
 922                 break;
 923         }
 924         return (0);
 925 }
 926
 927 /*
 928  * Cleanup for non-responded/OP ERR'd ASCONF
 929  */
 930 void
 931 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
 932 {
 933         /* mark peer as ASCONF incapable */
 934         stcb->asoc.peer_supports_asconf = 0;
 935         /*
 936          * clear out any existing asconfs going out
 937          */
 938         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
 939             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
 940         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
 941         /* remove the old ASCONF on our outbound queue */
 942         sctp_toss_old_asconf(stcb);
 943 }
 944
 945 /*
 946  * cleanup any cached source addresses that may be topologically
 947  * incorrect after a new address has been added to this interface.
 948  */
 949 static void
 950 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
 951 {
 952         struct sctp_nets *net;
 953
 954         /*
 955          * Ideally, we want to only clear cached routes and source addresses
 956          * that are topologically incorrect.  But since there is no easy way
 957          * to know whether the newly added address on the ifn would cause a
 958          * routing change (i.e. a new egress interface would be chosen)
 959          * without doing a new routing lookup and source address selection,
 960          * we will (for now) just flush any cached route using a different
 961          * ifn (and cached source addrs) and let output re-choose them
 962          * during the next send on that net.
 963          */
 964         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 965                 /*
 966                  * clear any cached route (and cached source address) if the
 967                  * route's interface is NOT the same as the address change.
 968                  * If it's the same interface, just clear the cached source
 969                  * address.
 970                  */
 971                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
 972                     ((ifn == NULL) ||
 973                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
 974                         /* clear any cached route */
 975                         RTFREE(net->ro.ro_rt);
 976                         net->ro.ro_rt = NULL;
 977                 }
 978                 /* clear any cached source address */
 979                 if (net->src_addr_selected) {
 980                         sctp_free_ifa(net->ro._s_addr);
 981                         net->ro._s_addr = NULL;
 982                         net->src_addr_selected = 0;
 983                 }
 984         }
 985 }
 986
 987
 988 void
 989 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
 990 {
 991         int error;
 992
 993         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
 994                 return;
 995         }
 996         if (stcb->asoc.deleted_primary == NULL) {
 997                 return;
 998         }
 999         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
1000                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
1001                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1002                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
1003                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
1004                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
1005                     stcb->asoc.deleted_primary,
1006                     SCTP_FROM_SCTP_TIMER + SCTP_LOC_8);
1007                 stcb->asoc.num_send_timers_up--;
1008                 if (stcb->asoc.num_send_timers_up < 0) {
1009                         stcb->asoc.num_send_timers_up = 0;
1010                 }
1011                 SCTP_TCB_LOCK_ASSERT(stcb);
1012                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1013                     stcb->asoc.deleted_primary);
1014                 if (error) {
1015                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1016                         return;
1017                 }
1018                 SCTP_TCB_LOCK_ASSERT(stcb);
1019 #ifdef SCTP_AUDITING_ENABLED
1020                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1021 #endif
1022                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1023                 if ((stcb->asoc.num_send_timers_up == 0) &&
1024                     (stcb->asoc.sent_queue_cnt > 0)) {
1025                         struct sctp_tmit_chunk *chk;
1026
1027                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1028                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1029                             stcb, chk->whoTo);
1030                 }
1031         }
1032         return;
1033 }
1034
1035 static int
1036     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1037
1038 void
1039 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1040 {
1041         struct sctp_tmit_chunk *chk;
1042
1043         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1044         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1045             SCTP_FROM_SCTP_TIMER + SCTP_LOC_5);
1046         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1047         net->error_count = 0;
1048         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1049                 if (chk->whoTo == net) {
1050                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1051                                 chk->sent = SCTP_DATAGRAM_RESEND;
1052                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1053                                 sctp_flight_size_decrease(chk);
1054                                 sctp_total_flight_decrease(stcb, chk);
1055                                 net->marked_retrans++;
1056                                 stcb->asoc.marked_retrans++;
1057                         }
1058                 }
1059         }
1060         if (net->marked_retrans) {
1061                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1062         }
1063 }
1064
1065 static void
1066 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1067 {
1068         struct sctp_nets *net;
1069         int addrnum, changed;
1070
1071         /*
1072          * If number of local valid addresses is 1, the valid address is
1073          * probably newly added address. Several valid addresses in this
1074          * association.  A source address may not be changed.  Additionally,
1075          * they can be configured on a same interface as "alias" addresses.
1076          * (by micchie)
1077          */
1078         addrnum = sctp_local_addr_count(stcb);
1079         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1080             addrnum);
1081         if (addrnum == 1) {
1082                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1083                         /* clear any cached route and source address */
1084                         if (net->ro.ro_rt) {
1085                                 RTFREE(net->ro.ro_rt);
1086                                 net->ro.ro_rt = NULL;
1087                         }
1088                         if (net->src_addr_selected) {
1089                                 sctp_free_ifa(net->ro._s_addr);
1090                                 net->ro._s_addr = NULL;
1091                                 net->src_addr_selected = 0;
1092                         }
1093                         /* Retransmit unacknowledged DATA chunks immediately */
1094                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1095                             SCTP_MOBILITY_FASTHANDOFF)) {
1096                                 sctp_net_immediate_retrans(stcb, net);
1097                         }
1098                         /* also, SET PRIMARY is maybe already sent */
1099                 }
1100                 return;
1101         }
1102         /* Multiple local addresses exsist in the association.  */
1103         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1104                 /* clear any cached route and source address */
1105                 if (net->ro.ro_rt) {
1106                         RTFREE(net->ro.ro_rt);
1107                         net->ro.ro_rt = NULL;
1108                 }
1109                 if (net->src_addr_selected) {
1110                         sctp_free_ifa(net->ro._s_addr);
1111                         net->ro._s_addr = NULL;
1112                         net->src_addr_selected = 0;
1113                 }
1114                 /*
1115                  * Check if the nexthop is corresponding to the new address.
1116                  * If the new address is corresponding to the current
1117                  * nexthop, the path will be changed. If the new address is
1118                  * NOT corresponding to the current nexthop, the path will
1119                  * not be changed.
1120                  */
1121                 SCTP_RTALLOC((sctp_route_t *) & net->ro,
1122                     stcb->sctp_ep->def_vrf_id);
1123                 if (net->ro.ro_rt == NULL)
1124                         continue;
1125
1126                 changed = 0;
1127                 switch (net->ro._l_addr.sa.sa_family) {
1128 #ifdef INET
1129                 case AF_INET:
1130                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) {
1131                                 changed = 1;
1132                         }
1133                         break;
1134 #endif
1135 #ifdef INET6
1136                 case AF_INET6:
1137                         if (sctp_v6src_match_nexthop(
1138                             &newifa->address.sin6, (sctp_route_t *) & net->ro)) {
1139                                 changed = 1;
1140                         }
1141                         break;
1142 #endif
1143                 default:
1144                         break;
1145                 }
1146                 /*
1147                  * if the newly added address does not relate routing
1148                  * information, we skip.
1149                  */
1150                 if (changed == 0)
1151                         continue;
1152                 /* Retransmit unacknowledged DATA chunks immediately */
1153                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1154                     SCTP_MOBILITY_FASTHANDOFF)) {
1155                         sctp_net_immediate_retrans(stcb, net);
1156                 }
1157                 /* Send SET PRIMARY for this new address */
1158                 if (net == stcb->asoc.primary_destination) {
1159                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1160                             SCTP_SET_PRIM_ADDR);
1161                 }
1162         }
1163 }
1164
1165 /*
1166  * process an ADD/DELETE IP ack from peer.
1167  * addr: corresponding sctp_ifa to the address being added/deleted.
1168  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1169  * flag: 1=success, 0=failure.
1170  */
1171 static void
1172 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1173 {
1174         /*
1175          * do the necessary asoc list work- if we get a failure indication,
1176          * leave the address on the assoc's restricted list.  If we get a
1177          * success indication, remove the address from the restricted list.
1178          */
1179         /*
1180          * Note: this will only occur for ADD_IP_ADDRESS, since
1181          * DEL_IP_ADDRESS is never actually added to the list...
1182          */
1183         if (flag) {
1184                 /* success case, so remove from the restricted list */
1185                 sctp_del_local_addr_restricted(stcb, addr);
1186
1187                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1188                     SCTP_MOBILITY_BASE) ||
1189                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1190                     SCTP_MOBILITY_FASTHANDOFF)) {
1191                         sctp_path_check_and_react(stcb, addr);
1192                         return;
1193                 }
1194                 /* clear any cached/topologically incorrect source addresses */
1195                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1196         }
1197         /* else, leave it on the list */
1198 }
1199
1200 /*
1201  * add an asconf add/delete/set primary IP address parameter to the queue.
1202  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1203  * returns 0 if queued, -1 if not queued/removed.
1204  * NOTE: if adding, but a delete for the same address is already scheduled
1205  * (and not yet sent out), simply remove it from queue.  Same for deleting
1206  * an address already scheduled for add.  If a duplicate operation is found,
1207  * ignore the new one.
1208  */
1209 static int
1210 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1211     uint16_t type)
1212 {
1213         struct sctp_asconf_addr *aa, *aa_next;
1214
1215         /* make sure the request isn't already in the queue */
1216         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1217                 /* address match? */
1218                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1219                         continue;
1220                 /*
1221                  * is the request already in queue but not sent? pass the
1222                  * request already sent in order to resolve the following
1223                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1224                  * can't remove the ADD request already sent 3. arrival of
1225                  * ADD
1226                  */
1227                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1228                         return (-1);
1229                 }
1230                 /* is the negative request already in queue, and not sent */
1231                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1232                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1233                         /* add requested, delete already queued */
1234                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1235                         /* remove the ifa from the restricted list */
1236                         sctp_del_local_addr_restricted(stcb, ifa);
1237                         /* free the asconf param */
1238                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1239                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1240                         return (-1);
1241                 }
1242                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1243                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1244                         /* delete requested, add already queued */
1245                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1246                         /* remove the aa->ifa from the restricted list */
1247                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1248                         /* free the asconf param */
1249                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1250                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1251                         return (-1);
1252                 }
1253         }                       /* for each aa */
1254
1255         /* adding new request to the queue */
1256         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1257             SCTP_M_ASC_ADDR);
1258         if (aa == NULL) {
1259                 /* didn't get memory */
1260                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1261                 return (-1);
1262         }
1263         aa->special_del = 0;
1264         /* fill in asconf address parameter fields */
1265         /* top level elements are "networked" during send */
1266         aa->ap.aph.ph.param_type = type;
1267         aa->ifa = ifa;
1268         atomic_add_int(&ifa->refcount, 1);
1269         /* correlation_id filled in during send routine later... */
1270         switch (ifa->address.sa.sa_family) {
1271 #ifdef INET6
1272         case AF_INET6:
1273                 {
1274                         struct sockaddr_in6 *sin6;
1275
1276                         sin6 = (struct sockaddr_in6 *)&ifa->address.sa;
1277                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1278                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1279                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1280                             sizeof(struct sctp_ipv6addr_param);
1281                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1282                             sizeof(struct in6_addr));
1283                         break;
1284                 }
1285 #endif
1286 #ifdef INET
1287         case AF_INET:
1288                 {
1289                         struct sockaddr_in *sin;
1290
1291                         sin = (struct sockaddr_in *)&ifa->address.sa;
1292                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1293                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1294                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1295                             sizeof(struct sctp_ipv4addr_param);
1296                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1297                             sizeof(struct in_addr));
1298                         break;
1299                 }
1300 #endif
1301         default:
1302                 /* invalid family! */
1303                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1304                 sctp_free_ifa(ifa);
1305                 return (-1);
1306         }
1307         aa->sent = 0;           /* clear sent flag */
1308
1309         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1310 #ifdef SCTP_DEBUG
1311         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1312                 if (type == SCTP_ADD_IP_ADDRESS) {
1313                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1314                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1315                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1316                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1317                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1318                 } else {
1319                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1320                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1321                 }
1322         }
1323 #endif
1324
1325         return (0);
1326 }
1327
1328
1329 /*
1330  * add an asconf operation for the given ifa and type.
1331  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1332  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1333  * advisable.
1334  */
1335 static int
1336 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1337     uint16_t type)
1338 {
1339         uint32_t status;
1340         int pending_delete_queued = 0;
1341
1342         /* see if peer supports ASCONF */
1343         if (stcb->asoc.peer_supports_asconf == 0) {
1344                 return (-1);
1345         }
1346         /*
1347          * if this is deleting the last address from the assoc, mark it as
1348          * pending.
1349          */
1350         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending &&
1351             (sctp_local_addr_count(stcb) < 2)) {
1352                 /* set the pending delete info only */
1353                 stcb->asoc.asconf_del_pending = 1;
1354                 stcb->asoc.asconf_addr_del_pending = ifa;
1355                 atomic_add_int(&ifa->refcount, 1);
1356                 SCTPDBG(SCTP_DEBUG_ASCONF2,
1357                     "asconf_queue_add: mark delete last address pending\n");
1358                 return (-1);
1359         }
1360         /* queue an asconf parameter */
1361         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1362
1363         /*
1364          * if this is an add, and there is a delete also pending (i.e. the
1365          * last local address is being changed), queue the pending delete
1366          * too.
1367          */
1368         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1369                 /* queue in the pending delete */
1370                 if (sctp_asconf_queue_mgmt(stcb,
1371                     stcb->asoc.asconf_addr_del_pending,
1372                     SCTP_DEL_IP_ADDRESS) == 0) {
1373                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n");
1374                         pending_delete_queued = 1;
1375                         /* clear out the pending delete info */
1376                         stcb->asoc.asconf_del_pending = 0;
1377                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1378                         stcb->asoc.asconf_addr_del_pending = NULL;
1379                 }
1380         }
1381         if (pending_delete_queued) {
1382                 struct sctp_nets *net;
1383
1384                 /*
1385                  * since we know that the only/last address is now being
1386                  * changed in this case, reset the cwnd/rto on all nets to
1387                  * start as a new address and path.  Also clear the error
1388                  * counts to give the assoc the best chance to complete the
1389                  * address change.
1390                  */
1391                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1392                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1393                             net);
1394                         net->RTO = 0;
1395                         net->error_count = 0;
1396                 }
1397                 stcb->asoc.overall_error_count = 0;
1398                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1399                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1400                             stcb->asoc.overall_error_count,
1401                             0,
1402                             SCTP_FROM_SCTP_ASCONF,
1403                             __LINE__);
1404                 }
1405                 /* queue in an advisory set primary too */
1406                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1407                 /* let caller know we should send this out immediately */
1408                 status = 1;
1409         }
1410         return (status);
1411 }
1412
1413 /*-
1414  * add an asconf delete IP address parameter to the queue by sockaddr and
1415  * possibly with no sctp_ifa available.  This is only called by the routine
1416  * that checks the addresses in an INIT-ACK against the current address list.
1417  * returns 0 if completed, non-zero if not completed.
1418  * NOTE: if an add is already scheduled (and not yet sent out), simply
1419  * remove it from queue.  If a duplicate operation is found, ignore the
1420  * new one.
1421  */
1422 static int
1423 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1424 {
1425         struct sctp_ifa *ifa;
1426         struct sctp_asconf_addr *aa, *aa_next;
1427         uint32_t vrf_id;
1428
1429         if (stcb == NULL) {
1430                 return (-1);
1431         }
1432         /* see if peer supports ASCONF */
1433         if (stcb->asoc.peer_supports_asconf == 0) {
1434                 return (-1);
1435         }
1436         /* make sure the request isn't already in the queue */
1437         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1438                 /* address match? */
1439                 if (sctp_asconf_addr_match(aa, sa) == 0)
1440                         continue;
1441                 /* is the request already in queue (sent or not) */
1442                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1443                         return (-1);
1444                 }
1445                 /* is the negative request already in queue, and not sent */
1446                 if (aa->sent == 1)
1447                         continue;
1448                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1449                         /* add already queued, so remove existing entry */
1450                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1451                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1452                         /* free the entry */
1453                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1454                         return (-1);
1455                 }
1456         }                       /* for each aa */
1457
1458         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1459         if (stcb) {
1460                 vrf_id = stcb->asoc.vrf_id;
1461         } else {
1462                 vrf_id = SCTP_DEFAULT_VRFID;
1463         }
1464         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
1465
1466         /* adding new request to the queue */
1467         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1468             SCTP_M_ASC_ADDR);
1469         if (aa == NULL) {
1470                 /* didn't get memory */
1471                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1472                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1473                 return (-1);
1474         }
1475         aa->special_del = 0;
1476         /* fill in asconf address parameter fields */
1477         /* top level elements are "networked" during send */
1478         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1479         aa->ifa = ifa;
1480         if (ifa)
1481                 atomic_add_int(&ifa->refcount, 1);
1482         /* correlation_id filled in during send routine later... */
1483         switch (sa->sa_family) {
1484 #ifdef INET6
1485         case AF_INET6:
1486                 {
1487                         /* IPv6 address */
1488                         struct sockaddr_in6 *sin6;
1489
1490                         sin6 = (struct sockaddr_in6 *)sa;
1491                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1492                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1493                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1494                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1495                             sizeof(struct in6_addr));
1496                         break;
1497                 }
1498 #endif
1499 #ifdef INET
1500         case AF_INET:
1501                 {
1502                         /* IPv4 address */
1503                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1504
1505                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1506                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1507                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1508                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1509                             sizeof(struct in_addr));
1510                         break;
1511                 }
1512 #endif
1513         default:
1514                 /* invalid family! */
1515                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1516                 if (ifa)
1517                         sctp_free_ifa(ifa);
1518                 return (-1);
1519         }
1520         aa->sent = 0;           /* clear sent flag */
1521
1522         /* delete goes to the back of the queue */
1523         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1524
1525         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1526         return (0);
1527 }
1528
1529 /*
1530  * find a specific asconf param on our "sent" queue
1531  */
1532 static struct sctp_asconf_addr *
1533 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1534 {
1535         struct sctp_asconf_addr *aa;
1536
1537         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1538                 if (aa->ap.aph.correlation_id == correlation_id &&
1539                     aa->sent == 1) {
1540                         /* found it */
1541                         return (aa);
1542                 }
1543         }
1544         /* didn't find it */
1545         return (NULL);
1546 }
1547
1548 /*
1549  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1550  * notifications based on the error response
1551  */
1552 static void
1553 sctp_asconf_process_error(struct sctp_tcb *stcb,
1554     struct sctp_asconf_paramhdr *aph)
1555 {
1556         struct sctp_error_cause *eh;
1557         struct sctp_paramhdr *ph;
1558         uint16_t param_type;
1559         uint16_t error_code;
1560
1561         eh = (struct sctp_error_cause *)(aph + 1);
1562         ph = (struct sctp_paramhdr *)(eh + 1);
1563         /* validate lengths */
1564         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1565             htons(aph->ph.param_length)) {
1566                 /* invalid error cause length */
1567                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1568                     "asconf_process_error: cause element too long\n");
1569                 return;
1570         }
1571         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1572             htons(eh->length)) {
1573                 /* invalid included TLV length */
1574                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1575                     "asconf_process_error: included TLV too long\n");
1576                 return;
1577         }
1578         /* which error code ? */
1579         error_code = ntohs(eh->code);
1580         param_type = ntohs(aph->ph.param_type);
1581         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1582         switch (error_code) {
1583         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1584                 /* we allow ourselves to "try again" for this error */
1585                 break;
1586         default:
1587                 /* peer can't handle it... */
1588                 switch (param_type) {
1589                 case SCTP_ADD_IP_ADDRESS:
1590                 case SCTP_DEL_IP_ADDRESS:
1591                         stcb->asoc.peer_supports_asconf = 0;
1592                         break;
1593                 case SCTP_SET_PRIM_ADDR:
1594                         stcb->asoc.peer_supports_asconf = 0;
1595                         break;
1596                 default:
1597                         break;
1598                 }
1599         }
1600 }
1601
1602 /*
1603  * process an asconf queue param.
1604  * aparam: parameter to process, will be removed from the queue.
1605  * flag: 1=success case, 0=failure case
1606  */
1607 static void
1608 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1609     struct sctp_asconf_addr *aparam, uint32_t flag)
1610 {
1611         uint16_t param_type;
1612
1613         /* process this param */
1614         param_type = aparam->ap.aph.ph.param_type;
1615         switch (param_type) {
1616         case SCTP_ADD_IP_ADDRESS:
1617                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1618                     "process_param_ack: added IP address\n");
1619                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1620                 break;
1621         case SCTP_DEL_IP_ADDRESS:
1622                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1623                     "process_param_ack: deleted IP address\n");
1624                 /* nothing really to do... lists already updated */
1625                 break;
1626         case SCTP_SET_PRIM_ADDR:
1627                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1628                     "process_param_ack: set primary IP address\n");
1629                 /* nothing to do... peer may start using this addr */
1630                 if (flag == 0)
1631                         stcb->asoc.peer_supports_asconf = 0;
1632                 break;
1633         default:
1634                 /* should NEVER happen */
1635                 break;
1636         }
1637
1638         /* remove the param and free it */
1639         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1640         if (aparam->ifa)
1641                 sctp_free_ifa(aparam->ifa);
1642         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1643 }
1644
1645 /*
1646  * cleanup from a bad asconf ack parameter
1647  */
1648 static void
1649 sctp_asconf_ack_clear(struct sctp_tcb *stcb)
1650 {
1651         /* assume peer doesn't really know how to do asconfs */
1652         stcb->asoc.peer_supports_asconf = 0;
1653         /* XXX we could free the pending queue here */
1654 }
1655
1656 void
1657 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1658     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1659     struct sctp_nets *net, int *abort_no_unlock)
1660 {
1661         struct sctp_association *asoc;
1662         uint32_t serial_num;
1663         uint16_t ack_length;
1664         struct sctp_asconf_paramhdr *aph;
1665         struct sctp_asconf_addr *aa, *aa_next;
1666         uint32_t last_error_id = 0;     /* last error correlation id */
1667         uint32_t id;
1668         struct sctp_asconf_addr *ap;
1669
1670         /* asconf param buffer */
1671         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1672
1673         /* verify minimum length */
1674         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1675                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1676                     "handle_asconf_ack: chunk too small = %xh\n",
1677                     ntohs(cp->ch.chunk_length));
1678                 return;
1679         }
1680         asoc = &stcb->asoc;
1681         serial_num = ntohl(cp->serial_number);
1682
1683         /*
1684          * NOTE: we may want to handle this differently- currently, we will
1685          * abort when we get an ack for the expected serial number + 1 (eg.
1686          * we didn't send it), process an ack normally if it is the expected
1687          * serial number, and re-send the previous ack for *ALL* other
1688          * serial numbers
1689          */
1690
1691         /*
1692          * if the serial number is the next expected, but I didn't send it,
1693          * abort the asoc, since someone probably just hijacked us...
1694          */
1695         if (serial_num == (asoc->asconf_seq_out + 1)) {
1696                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1697                 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED);
1698                 *abort_no_unlock = 1;
1699                 return;
1700         }
1701         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1702                 /* got a duplicate/unexpected ASCONF-ACK */
1703                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1704                     serial_num, asoc->asconf_seq_out_acked + 1);
1705                 return;
1706         }
1707         if (serial_num == asoc->asconf_seq_out - 1) {
1708                 /* stop our timer */
1709                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1710                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
1711         }
1712         /* process the ASCONF-ACK contents */
1713         ack_length = ntohs(cp->ch.chunk_length) -
1714             sizeof(struct sctp_asconf_ack_chunk);
1715         offset += sizeof(struct sctp_asconf_ack_chunk);
1716         /* process through all parameters */
1717         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1718                 unsigned int param_length, param_type;
1719
1720                 /* get pointer to next asconf parameter */
1721                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1722                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1723                 if (aph == NULL) {
1724                         /* can't get an asconf paramhdr */
1725                         sctp_asconf_ack_clear(stcb);
1726                         return;
1727                 }
1728                 param_type = ntohs(aph->ph.param_type);
1729                 param_length = ntohs(aph->ph.param_length);
1730                 if (param_length > ack_length) {
1731                         sctp_asconf_ack_clear(stcb);
1732                         return;
1733                 }
1734                 if (param_length < sizeof(struct sctp_paramhdr)) {
1735                         sctp_asconf_ack_clear(stcb);
1736                         return;
1737                 }
1738                 /* get the complete parameter... */
1739                 if (param_length > sizeof(aparam_buf)) {
1740                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1741                             "param length (%u) larger than buffer size!\n", param_length);
1742                         sctp_asconf_ack_clear(stcb);
1743                         return;
1744                 }
1745                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1746                 if (aph == NULL) {
1747                         sctp_asconf_ack_clear(stcb);
1748                         return;
1749                 }
1750                 /* correlation_id is transparent to peer, no ntohl needed */
1751                 id = aph->correlation_id;
1752
1753                 switch (param_type) {
1754                 case SCTP_ERROR_CAUSE_IND:
1755                         last_error_id = id;
1756                         /* find the corresponding asconf param in our queue */
1757                         ap = sctp_asconf_find_param(stcb, id);
1758                         if (ap == NULL) {
1759                                 /* hmm... can't find this in our queue! */
1760                                 break;
1761                         }
1762                         /* process the parameter, failed flag */
1763                         sctp_asconf_process_param_ack(stcb, ap, 0);
1764                         /* process the error response */
1765                         sctp_asconf_process_error(stcb, aph);
1766                         break;
1767                 case SCTP_SUCCESS_REPORT:
1768                         /* find the corresponding asconf param in our queue */
1769                         ap = sctp_asconf_find_param(stcb, id);
1770                         if (ap == NULL) {
1771                                 /* hmm... can't find this in our queue! */
1772                                 break;
1773                         }
1774                         /* process the parameter, success flag */
1775                         sctp_asconf_process_param_ack(stcb, ap, 1);
1776                         break;
1777                 default:
1778                         break;
1779                 }               /* switch */
1780
1781                 /* update remaining ASCONF-ACK message length to process */
1782                 ack_length -= SCTP_SIZE32(param_length);
1783                 if (ack_length <= 0) {
1784                         /* no more data in the mbuf chain */
1785                         break;
1786                 }
1787                 offset += SCTP_SIZE32(param_length);
1788         }                       /* while */
1789
1790         /*
1791          * if there are any "sent" params still on the queue, these are
1792          * implicitly "success", or "failed" (if we got an error back) ...
1793          * so process these appropriately
1794          *
1795          * we assume that the correlation_id's are monotonically increasing
1796          * beginning from 1 and that we don't have *that* many outstanding
1797          * at any given time
1798          */
1799         if (last_error_id == 0)
1800                 last_error_id--;/* set to "max" value */
1801         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1802                 if (aa->sent == 1) {
1803                         /*
1804                          * implicitly successful or failed if correlation_id
1805                          * < last_error_id, then success else, failure
1806                          */
1807                         if (aa->ap.aph.correlation_id < last_error_id)
1808                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1809                         else
1810                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1811                 } else {
1812                         /*
1813                          * since we always process in order (FIFO queue) if
1814                          * we reach one that hasn't been sent, the rest
1815                          * should not have been sent either. so, we're
1816                          * done...
1817                          */
1818                         break;
1819                 }
1820         }
1821
1822         /* update the next sequence number to use */
1823         asoc->asconf_seq_out_acked++;
1824         /* remove the old ASCONF on our outbound queue */
1825         sctp_toss_old_asconf(stcb);
1826         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1827 #ifdef SCTP_TIMER_BASED_ASCONF
1828                 /* we have more params, so restart our timer */
1829                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1830                     stcb, net);
1831 #else
1832                 /* we have more params, so send out more */
1833                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1834 #endif
1835         }
1836 }
1837
1838 #ifdef INET6
1839 static uint32_t
1840 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1841 {
1842         struct sockaddr_in6 *sin6, *net6;
1843         struct sctp_nets *net;
1844
1845         if (sa->sa_family != AF_INET6) {
1846                 /* wrong family */
1847                 return (0);
1848         }
1849         sin6 = (struct sockaddr_in6 *)sa;
1850         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1851                 /* not link local address */
1852                 return (0);
1853         }
1854         /* hunt through our destination nets list for this scope_id */
1855         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1856                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1857                     AF_INET6)
1858                         continue;
1859                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1860                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1861                         continue;
1862                 if (sctp_is_same_scope(sin6, net6)) {
1863                         /* found one */
1864                         return (1);
1865                 }
1866         }
1867         /* didn't find one */
1868         return (0);
1869 }
1870
1871 #endif
1872
1873 /*
1874  * address management functions
1875  */
1876 static void
1877 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1878     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1879 {
1880         int status;
1881
1882         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1883             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1884                 /* subset bound, no ASCONF allowed case, so ignore */
1885                 return;
1886         }
1887         /*
1888          * note: we know this is not the subset bound, no ASCONF case eg.
1889          * this is boundall or subset bound w/ASCONF allowed
1890          */
1891
1892         /* first, make sure it's a good address family */
1893         switch (ifa->address.sa.sa_family) {
1894 #ifdef INET6
1895         case AF_INET6:
1896                 break;
1897 #endif
1898 #ifdef INET
1899         case AF_INET:
1900                 break;
1901 #endif
1902         default:
1903                 return;
1904         }
1905 #ifdef INET6
1906         /* make sure we're "allowed" to add this type of addr */
1907         if (ifa->address.sa.sa_family == AF_INET6) {
1908                 /* invalid if we're not a v6 endpoint */
1909                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1910                         return;
1911                 /* is the v6 addr really valid ? */
1912                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1913                         return;
1914                 }
1915         }
1916 #endif
1917         /* put this address on the "pending/do not use yet" list */
1918         sctp_add_local_addr_restricted(stcb, ifa);
1919         /*
1920          * check address scope if address is out of scope, don't queue
1921          * anything... note: this would leave the address on both inp and
1922          * asoc lists
1923          */
1924         switch (ifa->address.sa.sa_family) {
1925 #ifdef INET6
1926         case AF_INET6:
1927                 {
1928                         struct sockaddr_in6 *sin6;
1929
1930                         sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1931                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1932                                 /* we skip unspecifed addresses */
1933                                 return;
1934                         }
1935                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1936                                 if (stcb->asoc.scope.local_scope == 0) {
1937                                         return;
1938                                 }
1939                                 /* is it the right link local scope? */
1940                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1941                                         return;
1942                                 }
1943                         }
1944                         if (stcb->asoc.scope.site_scope == 0 &&
1945                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1946                                 return;
1947                         }
1948                         break;
1949                 }
1950 #endif
1951 #ifdef INET
1952         case AF_INET:
1953                 {
1954                         struct sockaddr_in *sin;
1955                         struct in6pcb *inp6;
1956
1957                         inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1958                         /* invalid if we are a v6 only endpoint */
1959                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1960                             SCTP_IPV6_V6ONLY(inp6))
1961                                 return;
1962
1963                         sin = (struct sockaddr_in *)&ifa->address.sa;
1964                         if (sin->sin_addr.s_addr == 0) {
1965                                 /* we skip unspecifed addresses */
1966                                 return;
1967                         }
1968                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
1969                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1970                                 return;
1971                         }
1972                         break;
1973                 }
1974 #endif
1975         default:
1976                 /* else, not AF_INET or AF_INET6, so skip */
1977                 return;
1978         }
1979
1980         /* queue an asconf for this address add/delete */
1981         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1982                 /* does the peer do asconf? */
1983                 if (stcb->asoc.peer_supports_asconf) {
1984                         /* queue an asconf for this addr */
1985                         status = sctp_asconf_queue_add(stcb, ifa, type);
1986
1987                         /*
1988                          * if queued ok, and in the open state, send out the
1989                          * ASCONF.  If in the non-open state, these will be
1990                          * sent when the state goes open.
1991                          */
1992                         if (status == 0 &&
1993                             SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
1994 #ifdef SCTP_TIMER_BASED_ASCONF
1995                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
1996                                     stcb, stcb->asoc.primary_destination);
1997 #else
1998                                 sctp_send_asconf(stcb, NULL, addr_locked);
1999 #endif
2000                         }
2001                 }
2002         }
2003 }
2004
2005
2006 int
2007 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2008 {
2009         struct sctp_asconf_iterator *asc;
2010         struct sctp_ifa *ifa;
2011         struct sctp_laddr *l;
2012         int cnt_invalid = 0;
2013
2014         asc = (struct sctp_asconf_iterator *)ptr;
2015         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2016                 ifa = l->ifa;
2017                 switch (ifa->address.sa.sa_family) {
2018 #ifdef INET6
2019                 case AF_INET6:
2020                         /* invalid if we're not a v6 endpoint */
2021                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2022                                 cnt_invalid++;
2023                                 if (asc->cnt == cnt_invalid)
2024                                         return (1);
2025                         }
2026                         break;
2027 #endif
2028 #ifdef INET
2029                 case AF_INET:
2030                         {
2031                                 /* invalid if we are a v6 only endpoint */
2032                                 struct in6pcb *inp6;
2033
2034                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2035                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2036                                     SCTP_IPV6_V6ONLY(inp6)) {
2037                                         cnt_invalid++;
2038                                         if (asc->cnt == cnt_invalid)
2039                                                 return (1);
2040                                 }
2041                                 break;
2042                         }
2043 #endif
2044                 default:
2045                         /* invalid address family */
2046                         cnt_invalid++;
2047                         if (asc->cnt == cnt_invalid)
2048                                 return (1);
2049                 }
2050         }
2051         return (0);
2052 }
2053
2054 static int
2055 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2056 {
2057         struct sctp_ifa *ifa;
2058         struct sctp_asconf_iterator *asc;
2059         struct sctp_laddr *laddr, *nladdr, *l;
2060
2061         /* Only for specific case not bound all */
2062         asc = (struct sctp_asconf_iterator *)ptr;
2063         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2064                 ifa = l->ifa;
2065                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2066                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2067                             sctp_nxt_addr) {
2068                                 if (laddr->ifa == ifa) {
2069                                         laddr->action = 0;
2070                                         break;
2071                                 }
2072                         }
2073                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2074                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2075                                 /* remove only after all guys are done */
2076                                 if (laddr->ifa == ifa) {
2077                                         sctp_del_local_addr_ep(inp, ifa);
2078                                 }
2079                         }
2080                 }
2081         }
2082         return (0);
2083 }
2084
2085 void
2086 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2087     void *ptr, uint32_t val SCTP_UNUSED)
2088 {
2089         struct sctp_asconf_iterator *asc;
2090         struct sctp_ifa *ifa;
2091         struct sctp_laddr *l;
2092         int cnt_invalid = 0;
2093         int type, status;
2094         int num_queued = 0;
2095
2096         asc = (struct sctp_asconf_iterator *)ptr;
2097         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2098                 ifa = l->ifa;
2099                 type = l->action;
2100
2101                 /* address's vrf_id must be the vrf_id of the assoc */
2102                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2103                         continue;
2104                 }
2105                 /* Same checks again for assoc */
2106                 switch (ifa->address.sa.sa_family) {
2107 #ifdef INET6
2108                 case AF_INET6:
2109                         {
2110                                 /* invalid if we're not a v6 endpoint */
2111                                 struct sockaddr_in6 *sin6;
2112
2113                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2114                                         cnt_invalid++;
2115                                         if (asc->cnt == cnt_invalid)
2116                                                 return;
2117                                         else
2118                                                 continue;
2119                                 }
2120                                 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2121                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2122                                         /* we skip unspecifed addresses */
2123                                         continue;
2124                                 }
2125                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2126                                         if (stcb->asoc.scope.local_scope == 0) {
2127                                                 continue;
2128                                         }
2129                                         /* is it the right link local scope? */
2130                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2131                                                 continue;
2132                                         }
2133                                 }
2134                                 break;
2135                         }
2136 #endif
2137 #ifdef INET
2138                 case AF_INET:
2139                         {
2140                                 /* invalid if we are a v6 only endpoint */
2141                                 struct in6pcb *inp6;
2142                                 struct sockaddr_in *sin;
2143
2144                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2145                                 /* invalid if we are a v6 only endpoint */
2146                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2147                                     SCTP_IPV6_V6ONLY(inp6))
2148                                         continue;
2149
2150                                 sin = (struct sockaddr_in *)&ifa->address.sa;
2151                                 if (sin->sin_addr.s_addr == 0) {
2152                                         /* we skip unspecifed addresses */
2153                                         continue;
2154                                 }
2155                                 if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2156                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2157                                         continue;
2158                                 }
2159                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2160                                     SCTP_IPV6_V6ONLY(inp6)) {
2161                                         cnt_invalid++;
2162                                         if (asc->cnt == cnt_invalid)
2163                                                 return;
2164                                         else
2165                                                 continue;
2166                                 }
2167                                 break;
2168                         }
2169 #endif
2170                 default:
2171                         /* invalid address family */
2172                         cnt_invalid++;
2173                         if (asc->cnt == cnt_invalid)
2174                                 return;
2175                         else
2176                                 continue;
2177                         break;
2178                 }
2179
2180                 if (type == SCTP_ADD_IP_ADDRESS) {
2181                         /* prevent this address from being used as a source */
2182                         sctp_add_local_addr_restricted(stcb, ifa);
2183                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2184                         struct sctp_nets *net;
2185
2186                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2187                                 sctp_rtentry_t *rt;
2188
2189                                 /* delete this address if cached */
2190                                 if (net->ro._s_addr == ifa) {
2191                                         sctp_free_ifa(net->ro._s_addr);
2192                                         net->ro._s_addr = NULL;
2193                                         net->src_addr_selected = 0;
2194                                         rt = net->ro.ro_rt;
2195                                         if (rt) {
2196                                                 RTFREE(rt);
2197                                                 net->ro.ro_rt = NULL;
2198                                         }
2199                                         /*
2200                                          * Now we deleted our src address,
2201                                          * should we not also now reset the
2202                                          * cwnd/rto to start as if its a new
2203                                          * address?
2204                                          */
2205                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2206                                         net->RTO = 0;
2207
2208                                 }
2209                         }
2210                 } else if (type == SCTP_SET_PRIM_ADDR) {
2211                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2212                                 /* must validate the ifa is in the ep */
2213                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2214                                         continue;
2215                                 }
2216                         } else {
2217                                 /* Need to check scopes for this guy */
2218                                 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2219                                         continue;
2220                                 }
2221                         }
2222                 }
2223                 /* queue an asconf for this address add/delete */
2224                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2225                     stcb->asoc.peer_supports_asconf) {
2226                         /* queue an asconf for this addr */
2227                         status = sctp_asconf_queue_add(stcb, ifa, type);
2228                         /*
2229                          * if queued ok, and in the open state, update the
2230                          * count of queued params.  If in the non-open
2231                          * state, these get sent when the assoc goes open.
2232                          */
2233                         if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2234                                 if (status >= 0) {
2235                                         num_queued++;
2236                                 }
2237                         }
2238                 }
2239         }
2240         /*
2241          * If we have queued params in the open state, send out an ASCONF.
2242          */
2243         if (num_queued > 0) {
2244                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2245         }
2246 }
2247
2248 void
2249 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2250 {
2251         struct sctp_asconf_iterator *asc;
2252         struct sctp_ifa *ifa;
2253         struct sctp_laddr *l, *nl;
2254
2255         asc = (struct sctp_asconf_iterator *)ptr;
2256         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2257                 ifa = l->ifa;
2258                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2259                         /* Clear the defer use flag */
2260                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2261                 }
2262                 sctp_free_ifa(ifa);
2263                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2264                 SCTP_DECR_LADDR_COUNT();
2265         }
2266         SCTP_FREE(asc, SCTP_M_ASC_IT);
2267 }
2268
2269 /*
2270  * sa is the sockaddr to ask the peer to set primary to.
2271  * returns: 0 = completed, -1 = error
2272  */
2273 int32_t
2274 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2275 {
2276         uint32_t vrf_id;
2277         struct sctp_ifa *ifa;
2278
2279         /* find the ifa for the desired set primary */
2280         vrf_id = stcb->asoc.vrf_id;
2281         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2282         if (ifa == NULL) {
2283                 /* Invalid address */
2284                 return (-1);
2285         }
2286         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2287         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2288                 /* set primary queuing succeeded */
2289                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2290                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2291                     (void *)stcb);
2292                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2293                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2294 #ifdef SCTP_TIMER_BASED_ASCONF
2295                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2296                             stcb->sctp_ep, stcb,
2297                             stcb->asoc.primary_destination);
2298 #else
2299                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2300 #endif
2301                 }
2302         } else {
2303                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2304                     (void *)stcb);
2305                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2306                 return (-1);
2307         }
2308         return (0);
2309 }
2310
2311 void
2312 sctp_set_primary_ip_address(struct sctp_ifa *ifa)
2313 {
2314         struct sctp_inpcb *inp;
2315
2316         /* go through all our PCB's */
2317         LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
2318                 struct sctp_tcb *stcb;
2319
2320                 /* process for all associations for this endpoint */
2321                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2322                         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2323                         if (!sctp_asconf_queue_add(stcb, ifa,
2324                             SCTP_SET_PRIM_ADDR)) {
2325                                 /* set primary queuing succeeded */
2326                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ",
2327                                     (void *)stcb);
2328                                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa);
2329                                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2330 #ifdef SCTP_TIMER_BASED_ASCONF
2331                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2332                                             stcb->sctp_ep, stcb,
2333                                             stcb->asoc.primary_destination);
2334 #else
2335                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2336 #endif
2337                                 }
2338                         }
2339                 }               /* for each stcb */
2340         }                       /* for each inp */
2341 }
2342
2343 int
2344 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2345 {
2346         struct sctp_tmit_chunk *chk, *nchk;
2347         unsigned int offset, asconf_limit;
2348         struct sctp_asconf_chunk *acp;
2349         struct sctp_asconf_paramhdr *aph;
2350         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2351         struct sctp_paramhdr *ph;
2352         int add_cnt, del_cnt;
2353         uint16_t last_param_type;
2354
2355         add_cnt = del_cnt = 0;
2356         last_param_type = 0;
2357         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2358                 if (chk->data == NULL) {
2359                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2360                         continue;
2361                 }
2362                 offset = 0;
2363                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2364                 offset += sizeof(struct sctp_asconf_chunk);
2365                 asconf_limit = ntohs(acp->ch.chunk_length);
2366                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2367                 if (ph == NULL) {
2368                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2369                         continue;
2370                 }
2371                 offset += ntohs(ph->param_length);
2372
2373                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2374                 if (aph == NULL) {
2375                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2376                         continue;
2377                 }
2378                 while (aph != NULL) {
2379                         unsigned int param_length, param_type;
2380
2381                         param_type = ntohs(aph->ph.param_type);
2382                         param_length = ntohs(aph->ph.param_length);
2383                         if (offset + param_length > asconf_limit) {
2384                                 /* parameter goes beyond end of chunk! */
2385                                 break;
2386                         }
2387                         if (param_length > sizeof(aparam_buf)) {
2388                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2389                                 break;
2390                         }
2391                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2392                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2393                                 break;
2394                         }
2395                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2396                         if (aph == NULL) {
2397                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2398                                 break;
2399                         }
2400                         ph = (struct sctp_paramhdr *)(aph + 1);
2401                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2402                                 switch (param_type) {
2403                                 case SCTP_ADD_IP_ADDRESS:
2404                                         add_cnt++;
2405                                         break;
2406                                 case SCTP_DEL_IP_ADDRESS:
2407                                         del_cnt++;
2408                                         break;
2409                                 default:
2410                                         break;
2411                                 }
2412                                 last_param_type = param_type;
2413                         }
2414                         offset += SCTP_SIZE32(param_length);
2415                         if (offset >= asconf_limit) {
2416                                 /* no more data in the mbuf chain */
2417                                 break;
2418                         }
2419                         /* get pointer to next asconf param */
2420                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2421                 }
2422         }
2423
2424         /*
2425          * we want to find the sequences which consist of ADD -> DEL -> ADD
2426          * or DEL -> ADD
2427          */
2428         if (add_cnt > del_cnt ||
2429             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2430                 return (1);
2431         }
2432         return (0);
2433 }
2434
2435 static struct sockaddr *
2436 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2437 {
2438         struct sctp_vrf *vrf = NULL;
2439         struct sctp_ifn *sctp_ifn;
2440         struct sctp_ifa *sctp_ifa;
2441
2442         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2443                 SCTP_IPI_ADDR_RLOCK();
2444         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2445         if (vrf == NULL) {
2446                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2447                         SCTP_IPI_ADDR_RUNLOCK();
2448                 return (NULL);
2449         }
2450         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2451                 if (stcb->asoc.scope.loopback_scope == 0 &&
2452                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2453                         /* Skip if loopback_scope not set */
2454                         continue;
2455                 }
2456                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2457                         switch (sctp_ifa->address.sa.sa_family) {
2458 #ifdef INET
2459                         case AF_INET:
2460                                 if (stcb->asoc.scope.ipv4_addr_legal) {
2461                                         struct sockaddr_in *sin;
2462
2463                                         sin = (struct sockaddr_in *)&sctp_ifa->address.sa;
2464                                         if (sin->sin_addr.s_addr == 0) {
2465                                                 /* skip unspecifed addresses */
2466                                                 continue;
2467                                         }
2468                                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2469                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2470                                                 continue;
2471
2472                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2473                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2474                                                 continue;
2475                                         /*
2476                                          * found a valid local v4 address to
2477                                          * use
2478                                          */
2479                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2480                                                 SCTP_IPI_ADDR_RUNLOCK();
2481                                         return (&sctp_ifa->address.sa);
2482                                 }
2483                                 break;
2484 #endif
2485 #ifdef INET6
2486                         case AF_INET6:
2487                                 if (stcb->asoc.scope.ipv6_addr_legal) {
2488                                         struct sockaddr_in6 *sin6;
2489
2490                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2491                                                 continue;
2492                                         }
2493                                         sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa;
2494                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2495                                                 /*
2496                                                  * we skip unspecifed
2497                                                  * addresses
2498                                                  */
2499                                                 continue;
2500                                         }
2501                                         if (stcb->asoc.scope.local_scope == 0 &&
2502                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2503                                                 continue;
2504                                         if (stcb->asoc.scope.site_scope == 0 &&
2505                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2506                                                 continue;
2507
2508                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2509                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2510                                                 continue;
2511                                         /*
2512                                          * found a valid local v6 address to
2513                                          * use
2514                                          */
2515                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2516                                                 SCTP_IPI_ADDR_RUNLOCK();
2517                                         return (&sctp_ifa->address.sa);
2518                                 }
2519                                 break;
2520 #endif
2521                         default:
2522                                 break;
2523                         }
2524                 }
2525         }
2526         /* no valid addresses found */
2527         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2528                 SCTP_IPI_ADDR_RUNLOCK();
2529         return (NULL);
2530 }
2531
2532 static struct sockaddr *
2533 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2534 {
2535         struct sctp_laddr *laddr;
2536
2537         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2538                 if (laddr->ifa == NULL) {
2539                         continue;
2540                 }
2541                 /* is the address restricted ? */
2542                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2543                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2544                         continue;
2545
2546                 /* found a valid local address to use */
2547                 return (&laddr->ifa->address.sa);
2548         }
2549         /* no valid addresses found */
2550         return (NULL);
2551 }
2552
2553 /*
2554  * builds an ASCONF chunk from queued ASCONF params.
2555  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2556  */
2557 struct mbuf *
2558 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2559 {
2560         struct mbuf *m_asconf, *m_asconf_chk;
2561         struct sctp_asconf_addr *aa;
2562         struct sctp_asconf_chunk *acp;
2563         struct sctp_asconf_paramhdr *aph;
2564         struct sctp_asconf_addr_param *aap;
2565         uint32_t p_length;
2566         uint32_t correlation_id = 1;    /* 0 is reserved... */
2567         caddr_t ptr, lookup_ptr;
2568         uint8_t lookup_used = 0;
2569
2570         /* are there any asconf params to send? */
2571         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2572                 if (aa->sent == 0)
2573                         break;
2574         }
2575         if (aa == NULL)
2576                 return (NULL);
2577
2578         /*
2579          * get a chunk header mbuf and a cluster for the asconf params since
2580          * it's simpler to fill in the asconf chunk header lookup address on
2581          * the fly
2582          */
2583         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA);
2584         if (m_asconf_chk == NULL) {
2585                 /* no mbuf's */
2586                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2587                     "compose_asconf: couldn't get chunk mbuf!\n");
2588                 return (NULL);
2589         }
2590         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
2591         if (m_asconf == NULL) {
2592                 /* no mbuf's */
2593                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2594                     "compose_asconf: couldn't get mbuf!\n");
2595                 sctp_m_freem(m_asconf_chk);
2596                 return (NULL);
2597         }
2598         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2599         SCTP_BUF_LEN(m_asconf) = 0;
2600         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2601         bzero(acp, sizeof(struct sctp_asconf_chunk));
2602         /* save pointers to lookup address and asconf params */
2603         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2604         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2605
2606         /* fill in chunk header info */
2607         acp->ch.chunk_type = SCTP_ASCONF;
2608         acp->ch.chunk_flags = 0;
2609         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2610         stcb->asoc.asconf_seq_out++;
2611
2612         /* add parameters... up to smallest MTU allowed */
2613         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2614                 if (aa->sent)
2615                         continue;
2616                 /* get the parameter length */
2617                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2618                 /* will it fit in current chunk? */
2619                 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) {
2620                         /* won't fit, so we're done with this chunk */
2621                         break;
2622                 }
2623                 /* assign (and store) a correlation id */
2624                 aa->ap.aph.correlation_id = correlation_id++;
2625
2626                 /*
2627                  * fill in address if we're doing a delete this is a simple
2628                  * way for us to fill in the correlation address, which
2629                  * should only be used by the peer if we're deleting our
2630                  * source address and adding a new address (e.g. renumbering
2631                  * case)
2632                  */
2633                 if (lookup_used == 0 &&
2634                     (aa->special_del == 0) &&
2635                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2636                         struct sctp_ipv6addr_param *lookup;
2637                         uint16_t p_size, addr_size;
2638
2639                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2640                         lookup->ph.param_type =
2641                             htons(aa->ap.addrp.ph.param_type);
2642                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2643                                 /* copy IPv6 address */
2644                                 p_size = sizeof(struct sctp_ipv6addr_param);
2645                                 addr_size = sizeof(struct in6_addr);
2646                         } else {
2647                                 /* copy IPv4 address */
2648                                 p_size = sizeof(struct sctp_ipv4addr_param);
2649                                 addr_size = sizeof(struct in_addr);
2650                         }
2651                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2652                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2653                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2654                         lookup_used = 1;
2655                 }
2656                 /* copy into current space */
2657                 memcpy(ptr, &aa->ap, p_length);
2658
2659                 /* network elements and update lengths */
2660                 aph = (struct sctp_asconf_paramhdr *)ptr;
2661                 aap = (struct sctp_asconf_addr_param *)ptr;
2662                 /* correlation_id is transparent to peer, no htonl needed */
2663                 aph->ph.param_type = htons(aph->ph.param_type);
2664                 aph->ph.param_length = htons(aph->ph.param_length);
2665                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2666                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2667
2668                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2669                 ptr += SCTP_SIZE32(p_length);
2670
2671                 /*
2672                  * these params are removed off the pending list upon
2673                  * getting an ASCONF-ACK back from the peer, just set flag
2674                  */
2675                 aa->sent = 1;
2676         }
2677         /* check to see if the lookup addr has been populated yet */
2678         if (lookup_used == 0) {
2679                 /* NOTE: if the address param is optional, can skip this... */
2680                 /* add any valid (existing) address... */
2681                 struct sctp_ipv6addr_param *lookup;
2682                 uint16_t p_size, addr_size;
2683                 struct sockaddr *found_addr;
2684                 caddr_t addr_ptr;
2685
2686                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2687                         found_addr = sctp_find_valid_localaddr(stcb,
2688                             addr_locked);
2689                 else
2690                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2691
2692                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2693                 if (found_addr != NULL) {
2694                         switch (found_addr->sa_family) {
2695 #ifdef INET6
2696                         case AF_INET6:
2697                                 /* copy IPv6 address */
2698                                 lookup->ph.param_type =
2699                                     htons(SCTP_IPV6_ADDRESS);
2700                                 p_size = sizeof(struct sctp_ipv6addr_param);
2701                                 addr_size = sizeof(struct in6_addr);
2702                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2703                                     found_addr)->sin6_addr;
2704                                 break;
2705 #endif
2706 #ifdef INET
2707                         case AF_INET:
2708                                 /* copy IPv4 address */
2709                                 lookup->ph.param_type =
2710                                     htons(SCTP_IPV4_ADDRESS);
2711                                 p_size = sizeof(struct sctp_ipv4addr_param);
2712                                 addr_size = sizeof(struct in_addr);
2713                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2714                                     found_addr)->sin_addr;
2715                                 break;
2716 #endif
2717                         default:
2718                                 p_size = 0;
2719                                 addr_size = 0;
2720                                 addr_ptr = NULL;
2721                                 break;
2722                         }
2723                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2724                         memcpy(lookup->addr, addr_ptr, addr_size);
2725                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2726                 } else {
2727                         /* uh oh... don't have any address?? */
2728                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2729                             "compose_asconf: no lookup addr!\n");
2730                         /* XXX for now, we send a IPv4 address of 0.0.0.0 */
2731                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2732                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2733                         bzero(lookup->addr, sizeof(struct in_addr));
2734                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2735                 }
2736         }
2737         /* chain it all together */
2738         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2739         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2740         acp->ch.chunk_length = htons(*retlen);
2741
2742         return (m_asconf_chk);
2743 }
2744
2745 /*
2746  * section to handle address changes before an association is up eg. changes
2747  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2748  */
2749
2750 /*
2751  * processes the (local) addresses in the INIT-ACK chunk
2752  */
2753 static void
2754 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2755     unsigned int offset, unsigned int length)
2756 {
2757         struct sctp_paramhdr tmp_param, *ph;
2758         uint16_t plen, ptype;
2759         struct sctp_ifa *sctp_ifa;
2760
2761 #ifdef INET6
2762         struct sctp_ipv6addr_param addr6_store;
2763         struct sockaddr_in6 sin6;
2764
2765 #endif
2766 #ifdef INET
2767         struct sctp_ipv4addr_param addr4_store;
2768         struct sockaddr_in sin;
2769
2770 #endif
2771         struct sockaddr *sa;
2772         uint32_t vrf_id;
2773
2774         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2775         if (stcb == NULL)       /* Un-needed check for SA */
2776                 return;
2777
2778         /* convert to upper bound */
2779         length += offset;
2780
2781         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2782                 return;
2783         }
2784         /* init the addresses */
2785 #ifdef INET6
2786         bzero(&sin6, sizeof(sin6));
2787         sin6.sin6_family = AF_INET6;
2788         sin6.sin6_len = sizeof(sin6);
2789         sin6.sin6_port = stcb->rport;
2790 #endif
2791
2792 #ifdef INET
2793         bzero(&sin, sizeof(sin));
2794         sin.sin_family = AF_INET;
2795         sin.sin_len = sizeof(sin);
2796         sin.sin_port = stcb->rport;
2797 #endif
2798
2799         /* go through the addresses in the init-ack */
2800         ph = (struct sctp_paramhdr *)
2801             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2802             (uint8_t *) & tmp_param);
2803         while (ph != NULL) {
2804                 ptype = ntohs(ph->param_type);
2805                 plen = ntohs(ph->param_length);
2806                 switch (ptype) {
2807 #ifdef INET6
2808                 case SCTP_IPV6_ADDRESS:
2809                         {
2810                                 struct sctp_ipv6addr_param *a6p;
2811
2812                                 /* get the entire IPv6 address param */
2813                                 a6p = (struct sctp_ipv6addr_param *)
2814                                     sctp_m_getptr(m, offset,
2815                                     sizeof(struct sctp_ipv6addr_param),
2816                                     (uint8_t *) & addr6_store);
2817                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2818                                     a6p == NULL) {
2819                                         return;
2820                                 }
2821                                 memcpy(&sin6.sin6_addr, a6p->addr,
2822                                     sizeof(struct in6_addr));
2823                                 sa = (struct sockaddr *)&sin6;
2824                                 break;
2825                         }
2826 #endif
2827 #ifdef INET
2828                 case SCTP_IPV4_ADDRESS:
2829                         {
2830                                 struct sctp_ipv4addr_param *a4p;
2831
2832                                 /* get the entire IPv4 address param */
2833                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2834                                     sizeof(struct sctp_ipv4addr_param),
2835                                     (uint8_t *) & addr4_store);
2836                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2837                                     a4p == NULL) {
2838                                         return;
2839                                 }
2840                                 sin.sin_addr.s_addr = a4p->addr;
2841                                 sa = (struct sockaddr *)&sin;
2842                                 break;
2843                         }
2844 #endif
2845                 default:
2846                         goto next_addr;
2847                 }
2848
2849                 /* see if this address really (still) exists */
2850                 if (stcb) {
2851                         vrf_id = stcb->asoc.vrf_id;
2852                 } else {
2853                         vrf_id = SCTP_DEFAULT_VRFID;
2854                 }
2855                 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id,
2856                     SCTP_ADDR_NOT_LOCKED);
2857                 if (sctp_ifa == NULL) {
2858                         /* address doesn't exist anymore */
2859                         int status;
2860
2861                         /* are ASCONFs allowed ? */
2862                         if ((sctp_is_feature_on(stcb->sctp_ep,
2863                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2864                             stcb->asoc.peer_supports_asconf) {
2865                                 /* queue an ASCONF DEL_IP_ADDRESS */
2866                                 status = sctp_asconf_queue_sa_delete(stcb, sa);
2867                                 /*
2868                                  * if queued ok, and in correct state, send
2869                                  * out the ASCONF.
2870                                  */
2871                                 if (status == 0 &&
2872                                     SCTP_GET_STATE(&stcb->asoc) ==
2873                                     SCTP_STATE_OPEN) {
2874 #ifdef SCTP_TIMER_BASED_ASCONF
2875                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2876                                             stcb->sctp_ep, stcb,
2877                                             stcb->asoc.primary_destination);
2878 #else
2879                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2880 #endif
2881                                 }
2882                         }
2883                 }
2884 next_addr:
2885                 /*
2886                  * Sanity check:  Make sure the length isn't 0, otherwise
2887                  * we'll be stuck in this loop for a long time...
2888                  */
2889                 if (SCTP_SIZE32(plen) == 0) {
2890                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2891                             plen, ptype);
2892                         return;
2893                 }
2894                 /* get next parameter */
2895                 offset += SCTP_SIZE32(plen);
2896                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2897                         return;
2898                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2899                     sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2900         }                       /* while */
2901 }
2902
2903 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2904 /*
2905  * checks to see if a specific address is in the initack address list returns
2906  * 1 if found, 0 if not
2907  */
2908 static uint32_t
2909 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
2910 {
2911         struct sctp_paramhdr tmp_param, *ph;
2912         uint16_t plen, ptype;
2913
2914 #ifdef INET
2915         struct sockaddr_in *sin;
2916         struct sctp_ipv4addr_param *a4p;
2917         struct sctp_ipv6addr_param addr4_store;
2918
2919 #endif
2920 #ifdef INET6
2921         struct sockaddr_in6 *sin6;
2922         struct sctp_ipv6addr_param *a6p;
2923         struct sctp_ipv6addr_param addr6_store;
2924         struct sockaddr_in6 sin6_tmp;
2925
2926 #endif
2927
2928         switch (sa->sa_family) {
2929 #ifdef INET
2930         case AF_INET:
2931                 break;
2932 #endif
2933 #ifdef INET6
2934         case AF_INET6:
2935                 break;
2936 #endif
2937         default:
2938                 return (0);
2939         }
2940
2941         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2942         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2943         /* convert to upper bound */
2944         length += offset;
2945
2946         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2947                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2948                     "find_initack_addr: invalid offset?\n");
2949                 return (0);
2950         }
2951         /* go through the addresses in the init-ack */
2952         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2953             sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2954         while (ph != NULL) {
2955                 ptype = ntohs(ph->param_type);
2956                 plen = ntohs(ph->param_length);
2957                 switch (ptype) {
2958 #ifdef INET6
2959                 case SCTP_IPV6_ADDRESS:
2960                         if (sa->sa_family == AF_INET6) {
2961                                 /* get the entire IPv6 address param */
2962                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
2963                                         break;
2964                                 }
2965                                 /* get the entire IPv6 address param */
2966                                 a6p = (struct sctp_ipv6addr_param *)
2967                                     sctp_m_getptr(m, offset,
2968                                     sizeof(struct sctp_ipv6addr_param),
2969                                     (uint8_t *) & addr6_store);
2970                                 if (a6p == NULL) {
2971                                         return (0);
2972                                 }
2973                                 sin6 = (struct sockaddr_in6 *)sa;
2974                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2975                                         /* create a copy and clear scope */
2976                                         memcpy(&sin6_tmp, sin6,
2977                                             sizeof(struct sockaddr_in6));
2978                                         sin6 = &sin6_tmp;
2979                                         in6_clearscope(&sin6->sin6_addr);
2980                                 }
2981                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
2982                                     sizeof(struct in6_addr)) == 0) {
2983                                         /* found it */
2984                                         return (1);
2985                                 }
2986                         }
2987                         break;
2988 #endif                          /* INET6 */
2989 #ifdef INET
2990                 case SCTP_IPV4_ADDRESS:
2991                         if (sa->sa_family == AF_INET) {
2992                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
2993                                         break;
2994                                 }
2995                                 /* get the entire IPv4 address param */
2996                                 a4p = (struct sctp_ipv4addr_param *)
2997                                     sctp_m_getptr(m, offset,
2998                                     sizeof(struct sctp_ipv4addr_param),
2999                                     (uint8_t *) & addr4_store);
3000                                 if (a4p == NULL) {
3001                                         return (0);
3002                                 }
3003                                 sin = (struct sockaddr_in *)sa;
3004                                 if (sin->sin_addr.s_addr == a4p->addr) {
3005                                         /* found it */
3006                                         return (1);
3007                                 }
3008                         }
3009                         break;
3010 #endif
3011                 default:
3012                         break;
3013                 }
3014                 /* get next parameter */
3015                 offset += SCTP_SIZE32(plen);
3016                 if (offset + sizeof(struct sctp_paramhdr) > length) {
3017                         return (0);
3018                 }
3019                 ph = (struct sctp_paramhdr *)
3020                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
3021                     (uint8_t *) & tmp_param);
3022         }                       /* while */
3023         /* not found! */
3024         return (0);
3025 }
3026
3027 /*
3028  * makes sure that the current endpoint local addr list is consistent with
3029  * the new association (eg. subset bound, asconf allowed) adds addresses as
3030  * necessary
3031  */
3032 static void
3033 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3034     int length, struct sockaddr *init_addr)
3035 {
3036         struct sctp_laddr *laddr;
3037
3038         /* go through the endpoint list */
3039         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3040                 /* be paranoid and validate the laddr */
3041                 if (laddr->ifa == NULL) {
3042                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3043                             "check_addr_list_ep: laddr->ifa is NULL");
3044                         continue;
3045                 }
3046                 if (laddr->ifa == NULL) {
3047                         SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3048                         continue;
3049                 }
3050                 /* do i have it implicitly? */
3051                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3052                         continue;
3053                 }
3054                 /* check to see if in the init-ack */
3055                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3056                         /* try to add it */
3057                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3058                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3059                 }
3060         }
3061 }
3062
3063 /*
3064  * makes sure that the current kernel address list is consistent with the new
3065  * association (with all addrs bound) adds addresses as necessary
3066  */
3067 static void
3068 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3069     int length, struct sockaddr *init_addr,
3070     uint16_t local_scope, uint16_t site_scope,
3071     uint16_t ipv4_scope, uint16_t loopback_scope)
3072 {
3073         struct sctp_vrf *vrf = NULL;
3074         struct sctp_ifn *sctp_ifn;
3075         struct sctp_ifa *sctp_ifa;
3076         uint32_t vrf_id;
3077
3078 #ifdef INET
3079         struct sockaddr_in *sin;
3080
3081 #endif
3082 #ifdef INET6
3083         struct sockaddr_in6 *sin6;
3084
3085 #endif
3086
3087         if (stcb) {
3088                 vrf_id = stcb->asoc.vrf_id;
3089         } else {
3090                 return;
3091         }
3092         SCTP_IPI_ADDR_RLOCK();
3093         vrf = sctp_find_vrf(vrf_id);
3094         if (vrf == NULL) {
3095                 SCTP_IPI_ADDR_RUNLOCK();
3096                 return;
3097         }
3098         /* go through all our known interfaces */
3099         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3100                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3101                         /* skip loopback interface */
3102                         continue;
3103                 }
3104                 /* go through each interface address */
3105                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3106                         /* do i have it implicitly? */
3107                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3108                                 continue;
3109                         }
3110                         switch (sctp_ifa->address.sa.sa_family) {
3111 #ifdef INET
3112                         case AF_INET:
3113                                 sin = (struct sockaddr_in *)&sctp_ifa->address.sin;
3114                                 if ((ipv4_scope == 0) &&
3115                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3116                                         /* private address not in scope */
3117                                         continue;
3118                                 }
3119                                 break;
3120 #endif
3121 #ifdef INET6
3122                         case AF_INET6:
3123                                 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sin6;
3124                                 if ((local_scope == 0) &&
3125                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3126                                         continue;
3127                                 }
3128                                 if ((site_scope == 0) &&
3129                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3130                                         continue;
3131                                 }
3132                                 break;
3133 #endif
3134                         default:
3135                                 break;
3136                         }
3137                         /* check to see if in the init-ack */
3138                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3139                                 /* try to add it */
3140                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3141                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3142                                     SCTP_ADDR_LOCKED);
3143                         }
3144                 }               /* end foreach ifa */
3145         }                       /* end foreach ifn */
3146         SCTP_IPI_ADDR_RUNLOCK();
3147 }
3148
3149 /*
3150  * validates an init-ack chunk (from a cookie-echo) with current addresses
3151  * adds addresses from the init-ack into our local address list, if needed
3152  * queues asconf adds/deletes addresses as needed and makes appropriate list
3153  * changes for source address selection m, offset: points to the start of the
3154  * address list in an init-ack chunk length: total length of the address
3155  * params only init_addr: address where my INIT-ACK was sent from
3156  */
3157 void
3158 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3159     int length, struct sockaddr *init_addr,
3160     uint16_t local_scope, uint16_t site_scope,
3161     uint16_t ipv4_scope, uint16_t loopback_scope)
3162 {
3163         /* process the local addresses in the initack */
3164         sctp_process_initack_addresses(stcb, m, offset, length);
3165
3166         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3167                 /* bound all case */
3168                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3169                     local_scope, site_scope, ipv4_scope, loopback_scope);
3170         } else {
3171                 /* subset bound case */
3172                 if (sctp_is_feature_on(stcb->sctp_ep,
3173                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3174                         /* asconf's allowed */
3175                         sctp_check_address_list_ep(stcb, m, offset, length,
3176                             init_addr);
3177                 }
3178                 /* else, no asconfs allowed, so what we sent is what we get */
3179         }
3180 }
3181
3182 /*
3183  * sctp_bindx() support
3184  */
3185 uint32_t
3186 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3187     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3188 {
3189         struct sctp_ifa *ifa;
3190         struct sctp_laddr *laddr, *nladdr;
3191
3192         if (sa->sa_len == 0) {
3193                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3194                 return (EINVAL);
3195         }
3196         if (sctp_ifap) {
3197                 ifa = sctp_ifap;
3198         } else if (type == SCTP_ADD_IP_ADDRESS) {
3199                 /* For an add the address MUST be on the system */
3200                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3201         } else if (type == SCTP_DEL_IP_ADDRESS) {
3202                 /* For a delete we need to find it in the inp */
3203                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3204         } else {
3205                 ifa = NULL;
3206         }
3207         if (ifa != NULL) {
3208                 if (type == SCTP_ADD_IP_ADDRESS) {
3209                         sctp_add_local_addr_ep(inp, ifa, type);
3210                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3211                         if (inp->laddr_count < 2) {
3212                                 /* can't delete the last local address */
3213                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3214                                 return (EINVAL);
3215                         }
3216                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3217                             sctp_nxt_addr) {
3218                                 if (ifa == laddr->ifa) {
3219                                         /* Mark in the delete */
3220                                         laddr->action = type;
3221                                 }
3222                         }
3223                 }
3224                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3225                         /*
3226                          * There is no need to start the iterator if the inp
3227                          * has no associations.
3228                          */
3229                         if (type == SCTP_DEL_IP_ADDRESS) {
3230                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3231                                         if (laddr->ifa == ifa) {
3232                                                 sctp_del_local_addr_ep(inp, ifa);
3233                                         }
3234                                 }
3235                         }
3236                 } else {
3237                         struct sctp_asconf_iterator *asc;
3238                         struct sctp_laddr *wi;
3239
3240                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3241                             sizeof(struct sctp_asconf_iterator),
3242                             SCTP_M_ASC_IT);
3243                         if (asc == NULL) {
3244                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3245                                 return (ENOMEM);
3246                         }
3247                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3248                         if (wi == NULL) {
3249                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3250                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3251                                 return (ENOMEM);
3252                         }
3253                         LIST_INIT(&asc->list_of_work);
3254                         asc->cnt = 1;
3255                         SCTP_INCR_LADDR_COUNT();
3256                         wi->ifa = ifa;
3257                         wi->action = type;
3258                         atomic_add_int(&ifa->refcount, 1);
3259                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3260                         (void)sctp_initiate_iterator(sctp_asconf_iterator_ep,
3261                             sctp_asconf_iterator_stcb,
3262                             sctp_asconf_iterator_ep_end,
3263                             SCTP_PCB_ANY_FLAGS,
3264                             SCTP_PCB_ANY_FEATURES,
3265                             SCTP_ASOC_ANY_STATE,
3266                             (void *)asc, 0,
3267                             sctp_asconf_iterator_end, inp, 0);
3268                 }
3269                 return (0);
3270         } else {
3271                 /* invalid address! */
3272                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3273                 return (EADDRNOTAVAIL);
3274         }
3275 }
3276
3277 void
3278 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3279     struct sctp_nets *net)
3280 {
3281         struct sctp_asconf_addr *aa;
3282         struct sctp_ifa *sctp_ifap;
3283         struct sctp_asconf_tag_param *vtag;
3284
3285 #ifdef INET
3286         struct sockaddr_in *to;
3287
3288 #endif
3289 #ifdef INET6
3290         struct sockaddr_in6 *to6;
3291
3292 #endif
3293         if (net == NULL) {
3294                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3295                 return;
3296         }
3297         if (stcb == NULL) {
3298                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3299                 return;
3300         }
3301         /*
3302          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3303          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3304          */
3305         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3306             SCTP_M_ASC_ADDR);
3307         if (aa == NULL) {
3308                 /* didn't get memory */
3309                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3310                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3311                 return;
3312         }
3313         aa->special_del = 0;
3314         /* fill in asconf address parameter fields */
3315         /* top level elements are "networked" during send */
3316         aa->ifa = NULL;
3317         aa->sent = 0;           /* clear sent flag */
3318         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3319         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3320         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3321         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3322         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3323         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3324
3325         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3326             SCTP_M_ASC_ADDR);
3327         if (aa == NULL) {
3328                 /* didn't get memory */
3329                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3330                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3331                 return;
3332         }
3333         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3334         /* fill in asconf address parameter fields */
3335         /* ADD(0.0.0.0) */
3336         switch (net->ro._l_addr.sa.sa_family) {
3337 #ifdef INET
3338         case AF_INET:
3339                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3340                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3341                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3342                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3343                 /* No need to add an address, we are using 0.0.0.0 */
3344                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3345                 break;
3346 #endif
3347 #ifdef INET6
3348         case AF_INET6:
3349                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3350                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3351                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3352                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3353                 /* No need to add an address, we are using 0.0.0.0 */
3354                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3355                 break;
3356 #endif
3357         }
3358         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3359             SCTP_M_ASC_ADDR);
3360         if (aa == NULL) {
3361                 /* didn't get memory */
3362                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3363                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3364                 return;
3365         }
3366         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3367         /* fill in asconf address parameter fields */
3368         /* ADD(0.0.0.0) */
3369         switch (net->ro._l_addr.sa.sa_family) {
3370 #ifdef INET
3371         case AF_INET:
3372                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3373                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3374                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3375                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3376                 /* No need to add an address, we are using 0.0.0.0 */
3377                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3378                 break;
3379 #endif
3380 #ifdef INET6
3381         case AF_INET6:
3382                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3383                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3384                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3385                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3386                 /* No need to add an address, we are using 0.0.0.0 */
3387                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3388                 break;
3389 #endif
3390         }
3391         /* Now we must hunt the addresses and add all global addresses */
3392         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3393                 struct sctp_vrf *vrf = NULL;
3394                 struct sctp_ifn *sctp_ifnp;
3395                 uint32_t vrf_id;
3396
3397                 vrf_id = stcb->sctp_ep->def_vrf_id;
3398                 vrf = sctp_find_vrf(vrf_id);
3399                 if (vrf == NULL) {
3400                         goto skip_rest;
3401                 }
3402                 SCTP_IPI_ADDR_RLOCK();
3403                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3404                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3405                                 switch (sctp_ifap->address.sa.sa_family) {
3406 #ifdef INET
3407                                 case AF_INET:
3408                                         to = &sctp_ifap->address.sin;
3409                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3410                                                 continue;
3411                                         }
3412                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3413                                                 continue;
3414                                         }
3415                                         break;
3416 #endif
3417 #ifdef INET6
3418                                 case AF_INET6:
3419                                         to6 = &sctp_ifap->address.sin6;
3420                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3421                                                 continue;
3422                                         }
3423                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3424                                                 continue;
3425                                         }
3426                                         break;
3427 #endif
3428                                 default:
3429                                         continue;
3430                                 }
3431                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3432                         }
3433                 }
3434                 SCTP_IPI_ADDR_RUNLOCK();
3435         } else {
3436                 struct sctp_laddr *laddr;
3437
3438                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3439                         if (laddr->ifa == NULL) {
3440                                 continue;
3441                         }
3442                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3443                                 /*
3444                                  * Address being deleted by the system, dont
3445                                  * list.
3446                                  */
3447                                 continue;
3448                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3449                                 /*
3450                                  * Address being deleted on this ep don't
3451                                  * list.
3452                                  */
3453                                 continue;
3454                         }
3455                         sctp_ifap = laddr->ifa;
3456                         switch (sctp_ifap->address.sa.sa_family) {
3457 #ifdef INET
3458                         case AF_INET:
3459                                 to = &sctp_ifap->address.sin;
3460                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3461                                         continue;
3462                                 }
3463                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3464                                         continue;
3465                                 }
3466                                 break;
3467 #endif
3468 #ifdef INET6
3469                         case AF_INET6:
3470                                 to6 = &sctp_ifap->address.sin6;
3471                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3472                                         continue;
3473                                 }
3474                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3475                                         continue;
3476                                 }
3477                                 break;
3478 #endif
3479                         default:
3480                                 continue;
3481                         }
3482                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3483                 }
3484         }
3485 skip_rest:
3486         /* Now we must send the asconf into the queue */
3487         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3488 }