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_NOWAIT, 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_NOWAIT, 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         union sctp_sockstore 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 = &store.sa;
 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 = &store.sin;
 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 = &store.sin6;
 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         union sctp_sockstore 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 = &store.sa;
 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 = &store.sin;
 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 = &store.sin6;
 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         union sctp_sockstore 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 = &store.sa;
 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 = &store.sin;
 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 = &store.sin6;
 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,
 559                             stcb->sctp_ep, stcb, NULL,
 560                             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1);
 561                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 562                             SCTP_MOBILITY_FASTHANDOFF)) {
 563                                 sctp_assoc_immediate_retrans(stcb,
 564                                     stcb->asoc.primary_destination);
 565                         }
 566                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 567                             SCTP_MOBILITY_BASE)) {
 568                                 sctp_move_chunks_from_net(stcb,
 569                                     stcb->asoc.deleted_primary);
 570                         }
 571                         sctp_delete_prim_timer(stcb->sctp_ep, stcb,
 572                             stcb->asoc.deleted_primary);
 573                 }
 574         } else {
 575                 /* couldn't set the requested primary address! */
 576                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 577                     "process_asconf_set_primary: set primary failed!\n");
 578                 /* must have been an invalid address, so report */
 579                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 580                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 581                     aparam_length);
 582         }
 583
 584         return (m_reply);
 585 }
 586
 587 /*
 588  * handles an ASCONF chunk.
 589  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 590  */
 591 void
 592 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 593     struct sockaddr *src,
 594     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 595     int first)
 596 {
 597         struct sctp_association *asoc;
 598         uint32_t serial_num;
 599         struct mbuf *n, *m_ack, *m_result, *m_tail;
 600         struct sctp_asconf_ack_chunk *ack_cp;
 601         struct sctp_asconf_paramhdr *aph;
 602         struct sctp_ipv6addr_param *p_addr;
 603         unsigned int asconf_limit, cnt;
 604         int error = 0;          /* did an error occur? */
 605
 606         /* asconf param buffer */
 607         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 608         struct sctp_asconf_ack *ack, *ack_next;
 609
 610         /* verify minimum length */
 611         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 612                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 613                     "handle_asconf: chunk too small = %xh\n",
 614                     ntohs(cp->ch.chunk_length));
 615                 return;
 616         }
 617         asoc = &stcb->asoc;
 618         serial_num = ntohl(cp->serial_number);
 619
 620         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 621                 /* got a duplicate ASCONF */
 622                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 623                     "handle_asconf: got duplicate serial number = %xh\n",
 624                     serial_num);
 625                 return;
 626         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 627                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 628                     serial_num, asoc->asconf_seq_in + 1);
 629                 return;
 630         }
 631         /* it's the expected "next" sequence number, so process it */
 632         asoc->asconf_seq_in = serial_num;       /* update sequence */
 633         /* get length of all the param's in the ASCONF */
 634         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 635         SCTPDBG(SCTP_DEBUG_ASCONF1,
 636             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 637             asconf_limit, serial_num);
 638
 639         if (first) {
 640                 /* delete old cache */
 641                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 642
 643                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 644                         if (ack->serial_number == serial_num)
 645                                 break;
 646                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 647                             ack->serial_number, serial_num);
 648                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 649                         if (ack->data != NULL) {
 650                                 sctp_m_freem(ack->data);
 651                         }
 652                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 653                 }
 654         }
 655         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 656             M_NOWAIT, 1, MT_DATA);
 657         if (m_ack == NULL) {
 658                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 659                     "handle_asconf: couldn't get mbuf!\n");
 660                 return;
 661         }
 662         m_tail = m_ack;         /* current reply chain's tail */
 663
 664         /* fill in ASCONF-ACK header */
 665         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 666         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 667         ack_cp->ch.chunk_flags = 0;
 668         ack_cp->serial_number = htonl(serial_num);
 669         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 670         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 671         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 672
 673         /* skip the lookup address parameter */
 674         offset += sizeof(struct sctp_asconf_chunk);
 675         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf);
 676         if (p_addr == NULL) {
 677                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 678                     "handle_asconf: couldn't get lookup addr!\n");
 679                 /* respond with a missing/invalid mandatory parameter error */
 680                 return;
 681         }
 682         /* param_length is already validated in process_control... */
 683         offset += ntohs(p_addr->ph.param_length);       /* skip lookup addr */
 684         /* get pointer to first asconf param in ASCONF */
 685         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf);
 686         if (aph == NULL) {
 687                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 688                 goto send_reply;
 689         }
 690         /* process through all parameters */
 691         cnt = 0;
 692         while (aph != NULL) {
 693                 unsigned int param_length, param_type;
 694
 695                 param_type = ntohs(aph->ph.param_type);
 696                 param_length = ntohs(aph->ph.param_length);
 697                 if (offset + param_length > asconf_limit) {
 698                         /* parameter goes beyond end of chunk! */
 699                         sctp_m_freem(m_ack);
 700                         return;
 701                 }
 702                 m_result = NULL;
 703
 704                 if (param_length > sizeof(aparam_buf)) {
 705                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 706                         sctp_m_freem(m_ack);
 707                         return;
 708                 }
 709                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 710                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 711                         sctp_m_freem(m_ack);
 712                 }
 713                 /* get the entire parameter */
 714                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 715                 if (aph == NULL) {
 716                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 717                         sctp_m_freem(m_ack);
 718                         return;
 719                 }
 720                 switch (param_type) {
 721                 case SCTP_ADD_IP_ADDRESS:
 722                         m_result = sctp_process_asconf_add_ip(src, aph, stcb,
 723                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 724                         cnt++;
 725                         break;
 726                 case SCTP_DEL_IP_ADDRESS:
 727                         m_result = sctp_process_asconf_delete_ip(src, aph, stcb,
 728                             error);
 729                         break;
 730                 case SCTP_ERROR_CAUSE_IND:
 731                         /* not valid in an ASCONF chunk */
 732                         break;
 733                 case SCTP_SET_PRIM_ADDR:
 734                         m_result = sctp_process_asconf_set_primary(src, aph,
 735                             stcb, error);
 736                         break;
 737                 case SCTP_NAT_VTAGS:
 738                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 739                         break;
 740                 case SCTP_SUCCESS_REPORT:
 741                         /* not valid in an ASCONF chunk */
 742                         break;
 743                 case SCTP_ULP_ADAPTATION:
 744                         /* FIX */
 745                         break;
 746                 default:
 747                         if ((param_type & 0x8000) == 0) {
 748                                 /* Been told to STOP at this param */
 749                                 asconf_limit = offset;
 750                                 /*
 751                                  * FIX FIX - We need to call
 752                                  * sctp_arethere_unrecognized_parameters()
 753                                  * to get a operr and send it for any
 754                                  * param's with the 0x4000 bit set OR do it
 755                                  * here ourselves... note we still must STOP
 756                                  * if the 0x8000 bit is clear.
 757                                  */
 758                         }
 759                         /* unknown/invalid param type */
 760                         break;
 761                 }               /* switch */
 762
 763                 /* add any (error) result to the reply mbuf chain */
 764                 if (m_result != NULL) {
 765                         SCTP_BUF_NEXT(m_tail) = m_result;
 766                         m_tail = m_result;
 767                         /* update lengths, make sure it's aligned too */
 768                         SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result));
 769                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 770                         /* set flag to force success reports */
 771                         error = 1;
 772                 }
 773                 offset += SCTP_SIZE32(param_length);
 774                 /* update remaining ASCONF message length to process */
 775                 if (offset >= asconf_limit) {
 776                         /* no more data in the mbuf chain */
 777                         break;
 778                 }
 779                 /* get pointer to next asconf param */
 780                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 781                     sizeof(struct sctp_asconf_paramhdr),
 782                     (uint8_t *) & aparam_buf);
 783                 if (aph == NULL) {
 784                         /* can't get an asconf paramhdr */
 785                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 786                         /* FIX ME - add error here... */
 787                 }
 788         }
 789
 790 send_reply:
 791         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 792         /* save the ASCONF-ACK reply */
 793         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 794             struct sctp_asconf_ack);
 795         if (ack == NULL) {
 796                 sctp_m_freem(m_ack);
 797                 return;
 798         }
 799         ack->serial_number = serial_num;
 800         ack->last_sent_to = NULL;
 801         ack->data = m_ack;
 802         ack->len = 0;
 803         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 804                 ack->len += SCTP_BUF_LEN(n);
 805         }
 806         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 807
 808         /* see if last_control_chunk_from is set properly (use IP src addr) */
 809         if (stcb->asoc.last_control_chunk_from == NULL) {
 810                 /*
 811                  * this could happen if the source address was just newly
 812                  * added
 813                  */
 814                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 815                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 816                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 817                 /* look up the from address */
 818                 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src);
 819 #ifdef SCTP_DEBUG
 820                 if (stcb->asoc.last_control_chunk_from == NULL) {
 821                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 822                 }
 823 #endif
 824         }
 825 }
 826
 827 /*
 828  * does the address match? returns 0 if not, 1 if so
 829  */
 830 static uint32_t
 831 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 832 {
 833         switch (sa->sa_family) {
 834 #ifdef INET6
 835         case AF_INET6:
 836                 {
 837                         /* XXX scopeid */
 838                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 839
 840                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 841                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 842                             sizeof(struct in6_addr)) == 0)) {
 843                                 return (1);
 844                         }
 845                         break;
 846                 }
 847 #endif
 848 #ifdef INET
 849         case AF_INET:
 850                 {
 851                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 852
 853                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 854                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 855                             sizeof(struct in_addr)) == 0)) {
 856                                 return (1);
 857                         }
 858                         break;
 859                 }
 860 #endif
 861         default:
 862                 break;
 863         }
 864         return (0);
 865 }
 866
 867 /*
 868  * does the address match? returns 0 if not, 1 if so
 869  */
 870 static uint32_t
 871 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 872 {
 873 #if defined(INET) || defined(INET6)
 874         uint16_t param_type, param_length;
 875
 876         param_type = ntohs(ph->param_type);
 877         param_length = ntohs(ph->param_length);
 878 #endif
 879         switch (sa->sa_family) {
 880 #ifdef INET6
 881         case AF_INET6:
 882                 {
 883                         /* XXX scopeid */
 884                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 885                         struct sctp_ipv6addr_param *v6addr;
 886
 887                         v6addr = (struct sctp_ipv6addr_param *)ph;
 888                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 889                             (param_length == sizeof(struct sctp_ipv6addr_param)) &&
 890                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 891                             sizeof(struct in6_addr)) == 0)) {
 892                                 return (1);
 893                         }
 894                         break;
 895                 }
 896 #endif
 897 #ifdef INET
 898         case AF_INET:
 899                 {
 900                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 901                         struct sctp_ipv4addr_param *v4addr;
 902
 903                         v4addr = (struct sctp_ipv4addr_param *)ph;
 904                         if ((param_type == SCTP_IPV4_ADDRESS) &&
 905                             (param_length == sizeof(struct sctp_ipv4addr_param)) &&
 906                             (memcmp(&v4addr->addr, &sin->sin_addr,
 907                             sizeof(struct in_addr)) == 0)) {
 908                                 return (1);
 909                         }
 910                         break;
 911                 }
 912 #endif
 913         default:
 914                 break;
 915         }
 916         return (0);
 917 }
 918
 919 /*
 920  * Cleanup for non-responded/OP ERR'd ASCONF
 921  */
 922 void
 923 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
 924 {
 925         /*
 926          * clear out any existing asconfs going out
 927          */
 928         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
 929             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
 930         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
 931         /* remove the old ASCONF on our outbound queue */
 932         sctp_toss_old_asconf(stcb);
 933 }
 934
 935 /*
 936  * cleanup any cached source addresses that may be topologically
 937  * incorrect after a new address has been added to this interface.
 938  */
 939 static void
 940 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
 941 {
 942         struct sctp_nets *net;
 943
 944         /*
 945          * Ideally, we want to only clear cached routes and source addresses
 946          * that are topologically incorrect.  But since there is no easy way
 947          * to know whether the newly added address on the ifn would cause a
 948          * routing change (i.e. a new egress interface would be chosen)
 949          * without doing a new routing lookup and source address selection,
 950          * we will (for now) just flush any cached route using a different
 951          * ifn (and cached source addrs) and let output re-choose them
 952          * during the next send on that net.
 953          */
 954         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 955                 /*
 956                  * clear any cached route (and cached source address) if the
 957                  * route's interface is NOT the same as the address change.
 958                  * If it's the same interface, just clear the cached source
 959                  * address.
 960                  */
 961                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
 962                     ((ifn == NULL) ||
 963                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
 964                         /* clear any cached route */
 965                         RTFREE(net->ro.ro_rt);
 966                         net->ro.ro_rt = NULL;
 967                 }
 968                 /* clear any cached source address */
 969                 if (net->src_addr_selected) {
 970                         sctp_free_ifa(net->ro._s_addr);
 971                         net->ro._s_addr = NULL;
 972                         net->src_addr_selected = 0;
 973                 }
 974         }
 975 }
 976
 977
 978 void
 979 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
 980 {
 981         int error;
 982
 983         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
 984                 return;
 985         }
 986         if (stcb->asoc.deleted_primary == NULL) {
 987                 return;
 988         }
 989         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
 990                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
 991                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
 992                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
 993                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
 994                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
 995                     stcb->asoc.deleted_primary,
 996                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
 997                 stcb->asoc.num_send_timers_up--;
 998                 if (stcb->asoc.num_send_timers_up < 0) {
 999                         stcb->asoc.num_send_timers_up = 0;
1000                 }
1001                 SCTP_TCB_LOCK_ASSERT(stcb);
1002                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1003                     stcb->asoc.deleted_primary);
1004                 if (error) {
1005                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1006                         return;
1007                 }
1008                 SCTP_TCB_LOCK_ASSERT(stcb);
1009 #ifdef SCTP_AUDITING_ENABLED
1010                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1011 #endif
1012                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1013                 if ((stcb->asoc.num_send_timers_up == 0) &&
1014                     (stcb->asoc.sent_queue_cnt > 0)) {
1015                         struct sctp_tmit_chunk *chk;
1016
1017                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1018                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1019                             stcb, chk->whoTo);
1020                 }
1021         }
1022         return;
1023 }
1024
1025 static int
1026     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1027
1028 void
1029 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1030 {
1031         struct sctp_tmit_chunk *chk;
1032
1033         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1034         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1035             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4);
1036         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1037         net->error_count = 0;
1038         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1039                 if (chk->whoTo == net) {
1040                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1041                                 chk->sent = SCTP_DATAGRAM_RESEND;
1042                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1043                                 sctp_flight_size_decrease(chk);
1044                                 sctp_total_flight_decrease(stcb, chk);
1045                                 net->marked_retrans++;
1046                                 stcb->asoc.marked_retrans++;
1047                         }
1048                 }
1049         }
1050         if (net->marked_retrans) {
1051                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1052         }
1053 }
1054
1055 static void
1056 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1057 {
1058         struct sctp_nets *net;
1059         int addrnum, changed;
1060
1061         /*
1062          * If number of local valid addresses is 1, the valid address is
1063          * probably newly added address. Several valid addresses in this
1064          * association.  A source address may not be changed.  Additionally,
1065          * they can be configured on a same interface as "alias" addresses.
1066          * (by micchie)
1067          */
1068         addrnum = sctp_local_addr_count(stcb);
1069         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1070             addrnum);
1071         if (addrnum == 1) {
1072                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1073                         /* clear any cached route and source address */
1074                         if (net->ro.ro_rt) {
1075                                 RTFREE(net->ro.ro_rt);
1076                                 net->ro.ro_rt = NULL;
1077                         }
1078                         if (net->src_addr_selected) {
1079                                 sctp_free_ifa(net->ro._s_addr);
1080                                 net->ro._s_addr = NULL;
1081                                 net->src_addr_selected = 0;
1082                         }
1083                         /* Retransmit unacknowledged DATA chunks immediately */
1084                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1085                             SCTP_MOBILITY_FASTHANDOFF)) {
1086                                 sctp_net_immediate_retrans(stcb, net);
1087                         }
1088                         /* also, SET PRIMARY is maybe already sent */
1089                 }
1090                 return;
1091         }
1092         /* Multiple local addresses exsist in the association.  */
1093         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1094                 /* clear any cached route and source address */
1095                 if (net->ro.ro_rt) {
1096                         RTFREE(net->ro.ro_rt);
1097                         net->ro.ro_rt = NULL;
1098                 }
1099                 if (net->src_addr_selected) {
1100                         sctp_free_ifa(net->ro._s_addr);
1101                         net->ro._s_addr = NULL;
1102                         net->src_addr_selected = 0;
1103                 }
1104                 /*
1105                  * Check if the nexthop is corresponding to the new address.
1106                  * If the new address is corresponding to the current
1107                  * nexthop, the path will be changed. If the new address is
1108                  * NOT corresponding to the current nexthop, the path will
1109                  * not be changed.
1110                  */
1111                 SCTP_RTALLOC((sctp_route_t *) & net->ro,
1112                     stcb->sctp_ep->def_vrf_id);
1113                 if (net->ro.ro_rt == NULL)
1114                         continue;
1115
1116                 changed = 0;
1117                 switch (net->ro._l_addr.sa.sa_family) {
1118 #ifdef INET
1119                 case AF_INET:
1120                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) {
1121                                 changed = 1;
1122                         }
1123                         break;
1124 #endif
1125 #ifdef INET6
1126                 case AF_INET6:
1127                         if (sctp_v6src_match_nexthop(
1128                             &newifa->address.sin6, (sctp_route_t *) & net->ro)) {
1129                                 changed = 1;
1130                         }
1131                         break;
1132 #endif
1133                 default:
1134                         break;
1135                 }
1136                 /*
1137                  * if the newly added address does not relate routing
1138                  * information, we skip.
1139                  */
1140                 if (changed == 0)
1141                         continue;
1142                 /* Retransmit unacknowledged DATA chunks immediately */
1143                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1144                     SCTP_MOBILITY_FASTHANDOFF)) {
1145                         sctp_net_immediate_retrans(stcb, net);
1146                 }
1147                 /* Send SET PRIMARY for this new address */
1148                 if (net == stcb->asoc.primary_destination) {
1149                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1150                             SCTP_SET_PRIM_ADDR);
1151                 }
1152         }
1153 }
1154
1155 /*
1156  * process an ADD/DELETE IP ack from peer.
1157  * addr: corresponding sctp_ifa to the address being added/deleted.
1158  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1159  * flag: 1=success, 0=failure.
1160  */
1161 static void
1162 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1163 {
1164         /*
1165          * do the necessary asoc list work- if we get a failure indication,
1166          * leave the address on the assoc's restricted list.  If we get a
1167          * success indication, remove the address from the restricted list.
1168          */
1169         /*
1170          * Note: this will only occur for ADD_IP_ADDRESS, since
1171          * DEL_IP_ADDRESS is never actually added to the list...
1172          */
1173         if (flag) {
1174                 /* success case, so remove from the restricted list */
1175                 sctp_del_local_addr_restricted(stcb, addr);
1176
1177                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1178                     SCTP_MOBILITY_BASE) ||
1179                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1180                     SCTP_MOBILITY_FASTHANDOFF)) {
1181                         sctp_path_check_and_react(stcb, addr);
1182                         return;
1183                 }
1184                 /* clear any cached/topologically incorrect source addresses */
1185                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1186         }
1187         /* else, leave it on the list */
1188 }
1189
1190 /*
1191  * add an asconf add/delete/set primary IP address parameter to the queue.
1192  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1193  * returns 0 if queued, -1 if not queued/removed.
1194  * NOTE: if adding, but a delete for the same address is already scheduled
1195  * (and not yet sent out), simply remove it from queue.  Same for deleting
1196  * an address already scheduled for add.  If a duplicate operation is found,
1197  * ignore the new one.
1198  */
1199 static int
1200 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1201     uint16_t type)
1202 {
1203         struct sctp_asconf_addr *aa, *aa_next;
1204
1205         /* make sure the request isn't already in the queue */
1206         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1207                 /* address match? */
1208                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1209                         continue;
1210                 /*
1211                  * is the request already in queue but not sent? pass the
1212                  * request already sent in order to resolve the following
1213                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1214                  * can't remove the ADD request already sent 3. arrival of
1215                  * ADD
1216                  */
1217                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1218                         return (-1);
1219                 }
1220                 /* is the negative request already in queue, and not sent */
1221                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1222                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1223                         /* add requested, delete already queued */
1224                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1225                         /* remove the ifa from the restricted list */
1226                         sctp_del_local_addr_restricted(stcb, ifa);
1227                         /* free the asconf param */
1228                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1229                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1230                         return (-1);
1231                 }
1232                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1233                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1234                         /* delete requested, add already queued */
1235                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1236                         /* remove the aa->ifa from the restricted list */
1237                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1238                         /* free the asconf param */
1239                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1240                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1241                         return (-1);
1242                 }
1243         }                       /* for each aa */
1244
1245         /* adding new request to the queue */
1246         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1247             SCTP_M_ASC_ADDR);
1248         if (aa == NULL) {
1249                 /* didn't get memory */
1250                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1251                 return (-1);
1252         }
1253         aa->special_del = 0;
1254         /* fill in asconf address parameter fields */
1255         /* top level elements are "networked" during send */
1256         aa->ap.aph.ph.param_type = type;
1257         aa->ifa = ifa;
1258         atomic_add_int(&ifa->refcount, 1);
1259         /* correlation_id filled in during send routine later... */
1260         switch (ifa->address.sa.sa_family) {
1261 #ifdef INET6
1262         case AF_INET6:
1263                 {
1264                         struct sockaddr_in6 *sin6;
1265
1266                         sin6 = &ifa->address.sin6;
1267                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1268                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1269                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1270                             sizeof(struct sctp_ipv6addr_param);
1271                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1272                             sizeof(struct in6_addr));
1273                         break;
1274                 }
1275 #endif
1276 #ifdef INET
1277         case AF_INET:
1278                 {
1279                         struct sockaddr_in *sin;
1280
1281                         sin = &ifa->address.sin;
1282                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1283                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1284                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1285                             sizeof(struct sctp_ipv4addr_param);
1286                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1287                             sizeof(struct in_addr));
1288                         break;
1289                 }
1290 #endif
1291         default:
1292                 /* invalid family! */
1293                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1294                 sctp_free_ifa(ifa);
1295                 return (-1);
1296         }
1297         aa->sent = 0;           /* clear sent flag */
1298
1299         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1300 #ifdef SCTP_DEBUG
1301         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1302                 if (type == SCTP_ADD_IP_ADDRESS) {
1303                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1304                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1305                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1306                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1307                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1308                 } else {
1309                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1310                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1311                 }
1312         }
1313 #endif
1314
1315         return (0);
1316 }
1317
1318
1319 /*
1320  * add an asconf operation for the given ifa and type.
1321  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1322  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1323  * advisable.
1324  */
1325 static int
1326 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1327     uint16_t type)
1328 {
1329         uint32_t status;
1330         int pending_delete_queued = 0;
1331
1332         /* see if peer supports ASCONF */
1333         if (stcb->asoc.asconf_supported == 0) {
1334                 return (-1);
1335         }
1336         /*
1337          * if this is deleting the last address from the assoc, mark it as
1338          * pending.
1339          */
1340         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending &&
1341             (sctp_local_addr_count(stcb) < 2)) {
1342                 /* set the pending delete info only */
1343                 stcb->asoc.asconf_del_pending = 1;
1344                 stcb->asoc.asconf_addr_del_pending = ifa;
1345                 atomic_add_int(&ifa->refcount, 1);
1346                 SCTPDBG(SCTP_DEBUG_ASCONF2,
1347                     "asconf_queue_add: mark delete last address pending\n");
1348                 return (-1);
1349         }
1350         /* queue an asconf parameter */
1351         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1352
1353         /*
1354          * if this is an add, and there is a delete also pending (i.e. the
1355          * last local address is being changed), queue the pending delete
1356          * too.
1357          */
1358         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1359                 /* queue in the pending delete */
1360                 if (sctp_asconf_queue_mgmt(stcb,
1361                     stcb->asoc.asconf_addr_del_pending,
1362                     SCTP_DEL_IP_ADDRESS) == 0) {
1363                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n");
1364                         pending_delete_queued = 1;
1365                         /* clear out the pending delete info */
1366                         stcb->asoc.asconf_del_pending = 0;
1367                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1368                         stcb->asoc.asconf_addr_del_pending = NULL;
1369                 }
1370         }
1371         if (pending_delete_queued) {
1372                 struct sctp_nets *net;
1373
1374                 /*
1375                  * since we know that the only/last address is now being
1376                  * changed in this case, reset the cwnd/rto on all nets to
1377                  * start as a new address and path.  Also clear the error
1378                  * counts to give the assoc the best chance to complete the
1379                  * address change.
1380                  */
1381                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1382                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1383                             net);
1384                         net->RTO = 0;
1385                         net->error_count = 0;
1386                 }
1387                 stcb->asoc.overall_error_count = 0;
1388                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1389                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1390                             stcb->asoc.overall_error_count,
1391                             0,
1392                             SCTP_FROM_SCTP_ASCONF,
1393                             __LINE__);
1394                 }
1395                 /* queue in an advisory set primary too */
1396                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1397                 /* let caller know we should send this out immediately */
1398                 status = 1;
1399         }
1400         return (status);
1401 }
1402
1403 /*-
1404  * add an asconf delete IP address parameter to the queue by sockaddr and
1405  * possibly with no sctp_ifa available.  This is only called by the routine
1406  * that checks the addresses in an INIT-ACK against the current address list.
1407  * returns 0 if completed, non-zero if not completed.
1408  * NOTE: if an add is already scheduled (and not yet sent out), simply
1409  * remove it from queue.  If a duplicate operation is found, ignore the
1410  * new one.
1411  */
1412 static int
1413 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1414 {
1415         struct sctp_ifa *ifa;
1416         struct sctp_asconf_addr *aa, *aa_next;
1417
1418         if (stcb == NULL) {
1419                 return (-1);
1420         }
1421         /* see if peer supports ASCONF */
1422         if (stcb->asoc.asconf_supported == 0) {
1423                 return (-1);
1424         }
1425         /* make sure the request isn't already in the queue */
1426         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1427                 /* address match? */
1428                 if (sctp_asconf_addr_match(aa, sa) == 0)
1429                         continue;
1430                 /* is the request already in queue (sent or not) */
1431                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1432                         return (-1);
1433                 }
1434                 /* is the negative request already in queue, and not sent */
1435                 if (aa->sent == 1)
1436                         continue;
1437                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1438                         /* add already queued, so remove existing entry */
1439                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1440                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1441                         /* free the entry */
1442                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1443                         return (-1);
1444                 }
1445         }                       /* for each aa */
1446
1447         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1448         ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED);
1449
1450         /* adding new request to the queue */
1451         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1452             SCTP_M_ASC_ADDR);
1453         if (aa == NULL) {
1454                 /* didn't get memory */
1455                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1456                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1457                 return (-1);
1458         }
1459         aa->special_del = 0;
1460         /* fill in asconf address parameter fields */
1461         /* top level elements are "networked" during send */
1462         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1463         aa->ifa = ifa;
1464         if (ifa)
1465                 atomic_add_int(&ifa->refcount, 1);
1466         /* correlation_id filled in during send routine later... */
1467         switch (sa->sa_family) {
1468 #ifdef INET6
1469         case AF_INET6:
1470                 {
1471                         /* IPv6 address */
1472                         struct sockaddr_in6 *sin6;
1473
1474                         sin6 = (struct sockaddr_in6 *)sa;
1475                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1476                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1477                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1478                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1479                             sizeof(struct in6_addr));
1480                         break;
1481                 }
1482 #endif
1483 #ifdef INET
1484         case AF_INET:
1485                 {
1486                         /* IPv4 address */
1487                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1488
1489                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1490                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1491                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1492                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1493                             sizeof(struct in_addr));
1494                         break;
1495                 }
1496 #endif
1497         default:
1498                 /* invalid family! */
1499                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1500                 if (ifa)
1501                         sctp_free_ifa(ifa);
1502                 return (-1);
1503         }
1504         aa->sent = 0;           /* clear sent flag */
1505
1506         /* delete goes to the back of the queue */
1507         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1508
1509         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1510         return (0);
1511 }
1512
1513 /*
1514  * find a specific asconf param on our "sent" queue
1515  */
1516 static struct sctp_asconf_addr *
1517 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1518 {
1519         struct sctp_asconf_addr *aa;
1520
1521         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1522                 if (aa->ap.aph.correlation_id == correlation_id &&
1523                     aa->sent == 1) {
1524                         /* found it */
1525                         return (aa);
1526                 }
1527         }
1528         /* didn't find it */
1529         return (NULL);
1530 }
1531
1532 /*
1533  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1534  * notifications based on the error response
1535  */
1536 static void
1537 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED,
1538     struct sctp_asconf_paramhdr *aph)
1539 {
1540         struct sctp_error_cause *eh;
1541         struct sctp_paramhdr *ph;
1542         uint16_t param_type;
1543         uint16_t error_code;
1544
1545         eh = (struct sctp_error_cause *)(aph + 1);
1546         ph = (struct sctp_paramhdr *)(eh + 1);
1547         /* validate lengths */
1548         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1549             htons(aph->ph.param_length)) {
1550                 /* invalid error cause length */
1551                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1552                     "asconf_process_error: cause element too long\n");
1553                 return;
1554         }
1555         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1556             htons(eh->length)) {
1557                 /* invalid included TLV length */
1558                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1559                     "asconf_process_error: included TLV too long\n");
1560                 return;
1561         }
1562         /* which error code ? */
1563         error_code = ntohs(eh->code);
1564         param_type = ntohs(aph->ph.param_type);
1565         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1566         switch (error_code) {
1567         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1568                 /* we allow ourselves to "try again" for this error */
1569                 break;
1570         default:
1571                 /* peer can't handle it... */
1572                 switch (param_type) {
1573                 case SCTP_ADD_IP_ADDRESS:
1574                 case SCTP_DEL_IP_ADDRESS:
1575                 case SCTP_SET_PRIM_ADDR:
1576                         break;
1577                 default:
1578                         break;
1579                 }
1580         }
1581 }
1582
1583 /*
1584  * process an asconf queue param.
1585  * aparam: parameter to process, will be removed from the queue.
1586  * flag: 1=success case, 0=failure case
1587  */
1588 static void
1589 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1590     struct sctp_asconf_addr *aparam, uint32_t flag)
1591 {
1592         uint16_t param_type;
1593
1594         /* process this param */
1595         param_type = aparam->ap.aph.ph.param_type;
1596         switch (param_type) {
1597         case SCTP_ADD_IP_ADDRESS:
1598                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1599                     "process_param_ack: added IP address\n");
1600                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1601                 break;
1602         case SCTP_DEL_IP_ADDRESS:
1603                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1604                     "process_param_ack: deleted IP address\n");
1605                 /* nothing really to do... lists already updated */
1606                 break;
1607         case SCTP_SET_PRIM_ADDR:
1608                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1609                     "process_param_ack: set primary IP address\n");
1610                 /* nothing to do... peer may start using this addr */
1611                 break;
1612         default:
1613                 /* should NEVER happen */
1614                 break;
1615         }
1616
1617         /* remove the param and free it */
1618         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1619         if (aparam->ifa)
1620                 sctp_free_ifa(aparam->ifa);
1621         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1622 }
1623
1624 /*
1625  * cleanup from a bad asconf ack parameter
1626  */
1627 static void
1628 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED)
1629 {
1630         /* assume peer doesn't really know how to do asconfs */
1631         /* XXX we could free the pending queue here */
1632
1633 }
1634
1635 void
1636 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1637     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1638     struct sctp_nets *net, int *abort_no_unlock)
1639 {
1640         struct sctp_association *asoc;
1641         uint32_t serial_num;
1642         uint16_t ack_length;
1643         struct sctp_asconf_paramhdr *aph;
1644         struct sctp_asconf_addr *aa, *aa_next;
1645         uint32_t last_error_id = 0;     /* last error correlation id */
1646         uint32_t id;
1647         struct sctp_asconf_addr *ap;
1648
1649         /* asconf param buffer */
1650         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1651
1652         /* verify minimum length */
1653         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1654                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1655                     "handle_asconf_ack: chunk too small = %xh\n",
1656                     ntohs(cp->ch.chunk_length));
1657                 return;
1658         }
1659         asoc = &stcb->asoc;
1660         serial_num = ntohl(cp->serial_number);
1661
1662         /*
1663          * NOTE: we may want to handle this differently- currently, we will
1664          * abort when we get an ack for the expected serial number + 1 (eg.
1665          * we didn't send it), process an ack normally if it is the expected
1666          * serial number, and re-send the previous ack for *ALL* other
1667          * serial numbers
1668          */
1669
1670         /*
1671          * if the serial number is the next expected, but I didn't send it,
1672          * abort the asoc, since someone probably just hijacked us...
1673          */
1674         if (serial_num == (asoc->asconf_seq_out + 1)) {
1675                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1676                 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED);
1677                 *abort_no_unlock = 1;
1678                 return;
1679         }
1680         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1681                 /* got a duplicate/unexpected ASCONF-ACK */
1682                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1683                     serial_num, asoc->asconf_seq_out_acked + 1);
1684                 return;
1685         }
1686         if (serial_num == asoc->asconf_seq_out - 1) {
1687                 /* stop our timer */
1688                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1689                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5);
1690         }
1691         /* process the ASCONF-ACK contents */
1692         ack_length = ntohs(cp->ch.chunk_length) -
1693             sizeof(struct sctp_asconf_ack_chunk);
1694         offset += sizeof(struct sctp_asconf_ack_chunk);
1695         /* process through all parameters */
1696         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1697                 unsigned int param_length, param_type;
1698
1699                 /* get pointer to next asconf parameter */
1700                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1701                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1702                 if (aph == NULL) {
1703                         /* can't get an asconf paramhdr */
1704                         sctp_asconf_ack_clear(stcb);
1705                         return;
1706                 }
1707                 param_type = ntohs(aph->ph.param_type);
1708                 param_length = ntohs(aph->ph.param_length);
1709                 if (param_length > ack_length) {
1710                         sctp_asconf_ack_clear(stcb);
1711                         return;
1712                 }
1713                 if (param_length < sizeof(struct sctp_paramhdr)) {
1714                         sctp_asconf_ack_clear(stcb);
1715                         return;
1716                 }
1717                 /* get the complete parameter... */
1718                 if (param_length > sizeof(aparam_buf)) {
1719                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1720                             "param length (%u) larger than buffer size!\n", param_length);
1721                         sctp_asconf_ack_clear(stcb);
1722                         return;
1723                 }
1724                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1725                 if (aph == NULL) {
1726                         sctp_asconf_ack_clear(stcb);
1727                         return;
1728                 }
1729                 /* correlation_id is transparent to peer, no ntohl needed */
1730                 id = aph->correlation_id;
1731
1732                 switch (param_type) {
1733                 case SCTP_ERROR_CAUSE_IND:
1734                         last_error_id = id;
1735                         /* find the corresponding asconf param in our queue */
1736                         ap = sctp_asconf_find_param(stcb, id);
1737                         if (ap == NULL) {
1738                                 /* hmm... can't find this in our queue! */
1739                                 break;
1740                         }
1741                         /* process the parameter, failed flag */
1742                         sctp_asconf_process_param_ack(stcb, ap, 0);
1743                         /* process the error response */
1744                         sctp_asconf_process_error(stcb, aph);
1745                         break;
1746                 case SCTP_SUCCESS_REPORT:
1747                         /* find the corresponding asconf param in our queue */
1748                         ap = sctp_asconf_find_param(stcb, id);
1749                         if (ap == NULL) {
1750                                 /* hmm... can't find this in our queue! */
1751                                 break;
1752                         }
1753                         /* process the parameter, success flag */
1754                         sctp_asconf_process_param_ack(stcb, ap, 1);
1755                         break;
1756                 default:
1757                         break;
1758                 }               /* switch */
1759
1760                 /* update remaining ASCONF-ACK message length to process */
1761                 ack_length -= SCTP_SIZE32(param_length);
1762                 if (ack_length <= 0) {
1763                         /* no more data in the mbuf chain */
1764                         break;
1765                 }
1766                 offset += SCTP_SIZE32(param_length);
1767         }                       /* while */
1768
1769         /*
1770          * if there are any "sent" params still on the queue, these are
1771          * implicitly "success", or "failed" (if we got an error back) ...
1772          * so process these appropriately
1773          *
1774          * we assume that the correlation_id's are monotonically increasing
1775          * beginning from 1 and that we don't have *that* many outstanding
1776          * at any given time
1777          */
1778         if (last_error_id == 0)
1779                 last_error_id--;/* set to "max" value */
1780         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1781                 if (aa->sent == 1) {
1782                         /*
1783                          * implicitly successful or failed if correlation_id
1784                          * < last_error_id, then success else, failure
1785                          */
1786                         if (aa->ap.aph.correlation_id < last_error_id)
1787                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1788                         else
1789                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1790                 } else {
1791                         /*
1792                          * since we always process in order (FIFO queue) if
1793                          * we reach one that hasn't been sent, the rest
1794                          * should not have been sent either. so, we're
1795                          * done...
1796                          */
1797                         break;
1798                 }
1799         }
1800
1801         /* update the next sequence number to use */
1802         asoc->asconf_seq_out_acked++;
1803         /* remove the old ASCONF on our outbound queue */
1804         sctp_toss_old_asconf(stcb);
1805         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1806 #ifdef SCTP_TIMER_BASED_ASCONF
1807                 /* we have more params, so restart our timer */
1808                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1809                     stcb, net);
1810 #else
1811                 /* we have more params, so send out more */
1812                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1813 #endif
1814         }
1815 }
1816
1817 #ifdef INET6
1818 static uint32_t
1819 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1820 {
1821         struct sockaddr_in6 *sin6, *net6;
1822         struct sctp_nets *net;
1823
1824         if (sa->sa_family != AF_INET6) {
1825                 /* wrong family */
1826                 return (0);
1827         }
1828         sin6 = (struct sockaddr_in6 *)sa;
1829         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1830                 /* not link local address */
1831                 return (0);
1832         }
1833         /* hunt through our destination nets list for this scope_id */
1834         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1835                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1836                     AF_INET6)
1837                         continue;
1838                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1839                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1840                         continue;
1841                 if (sctp_is_same_scope(sin6, net6)) {
1842                         /* found one */
1843                         return (1);
1844                 }
1845         }
1846         /* didn't find one */
1847         return (0);
1848 }
1849
1850 #endif
1851
1852 /*
1853  * address management functions
1854  */
1855 static void
1856 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1857     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1858 {
1859         int status;
1860
1861         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1862             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1863                 /* subset bound, no ASCONF allowed case, so ignore */
1864                 return;
1865         }
1866         /*
1867          * note: we know this is not the subset bound, no ASCONF case eg.
1868          * this is boundall or subset bound w/ASCONF allowed
1869          */
1870
1871         /* first, make sure that the address is IPv4 or IPv6 and not jailed */
1872         switch (ifa->address.sa.sa_family) {
1873 #ifdef INET6
1874         case AF_INET6:
1875                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1876                     &ifa->address.sin6.sin6_addr) != 0) {
1877                         return;
1878                 }
1879                 break;
1880 #endif
1881 #ifdef INET
1882         case AF_INET:
1883                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1884                     &ifa->address.sin.sin_addr) != 0) {
1885                         return;
1886                 }
1887                 break;
1888 #endif
1889         default:
1890                 return;
1891         }
1892 #ifdef INET6
1893         /* make sure we're "allowed" to add this type of addr */
1894         if (ifa->address.sa.sa_family == AF_INET6) {
1895                 /* invalid if we're not a v6 endpoint */
1896                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1897                         return;
1898                 /* is the v6 addr really valid ? */
1899                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1900                         return;
1901                 }
1902         }
1903 #endif
1904         /* put this address on the "pending/do not use yet" list */
1905         sctp_add_local_addr_restricted(stcb, ifa);
1906         /*
1907          * check address scope if address is out of scope, don't queue
1908          * anything... note: this would leave the address on both inp and
1909          * asoc lists
1910          */
1911         switch (ifa->address.sa.sa_family) {
1912 #ifdef INET6
1913         case AF_INET6:
1914                 {
1915                         struct sockaddr_in6 *sin6;
1916
1917                         sin6 = &ifa->address.sin6;
1918                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1919                                 /* we skip unspecifed addresses */
1920                                 return;
1921                         }
1922                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1923                                 if (stcb->asoc.scope.local_scope == 0) {
1924                                         return;
1925                                 }
1926                                 /* is it the right link local scope? */
1927                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1928                                         return;
1929                                 }
1930                         }
1931                         if (stcb->asoc.scope.site_scope == 0 &&
1932                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1933                                 return;
1934                         }
1935                         break;
1936                 }
1937 #endif
1938 #ifdef INET
1939         case AF_INET:
1940                 {
1941                         struct sockaddr_in *sin;
1942                         struct in6pcb *inp6;
1943
1944                         inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1945                         /* invalid if we are a v6 only endpoint */
1946                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1947                             SCTP_IPV6_V6ONLY(inp6))
1948                                 return;
1949
1950                         sin = &ifa->address.sin;
1951                         if (sin->sin_addr.s_addr == 0) {
1952                                 /* we skip unspecifed addresses */
1953                                 return;
1954                         }
1955                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
1956                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1957                                 return;
1958                         }
1959                         break;
1960                 }
1961 #endif
1962         default:
1963                 /* else, not AF_INET or AF_INET6, so skip */
1964                 return;
1965         }
1966
1967         /* queue an asconf for this address add/delete */
1968         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1969                 /* does the peer do asconf? */
1970                 if (stcb->asoc.asconf_supported) {
1971                         /* queue an asconf for this addr */
1972                         status = sctp_asconf_queue_add(stcb, ifa, type);
1973
1974                         /*
1975                          * if queued ok, and in the open state, send out the
1976                          * ASCONF.  If in the non-open state, these will be
1977                          * sent when the state goes open.
1978                          */
1979                         if (status == 0 &&
1980                             ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
1981                             (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED))) {
1982 #ifdef SCTP_TIMER_BASED_ASCONF
1983                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
1984                                     stcb, stcb->asoc.primary_destination);
1985 #else
1986                                 sctp_send_asconf(stcb, NULL, addr_locked);
1987 #endif
1988                         }
1989                 }
1990         }
1991 }
1992
1993
1994 int
1995 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
1996 {
1997         struct sctp_asconf_iterator *asc;
1998         struct sctp_ifa *ifa;
1999         struct sctp_laddr *l;
2000         int cnt_invalid = 0;
2001
2002         asc = (struct sctp_asconf_iterator *)ptr;
2003         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2004                 ifa = l->ifa;
2005                 switch (ifa->address.sa.sa_family) {
2006 #ifdef INET6
2007                 case AF_INET6:
2008                         /* invalid if we're not a v6 endpoint */
2009                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2010                                 cnt_invalid++;
2011                                 if (asc->cnt == cnt_invalid)
2012                                         return (1);
2013                         }
2014                         break;
2015 #endif
2016 #ifdef INET
2017                 case AF_INET:
2018                         {
2019                                 /* invalid if we are a v6 only endpoint */
2020                                 struct in6pcb *inp6;
2021
2022                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2023                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2024                                     SCTP_IPV6_V6ONLY(inp6)) {
2025                                         cnt_invalid++;
2026                                         if (asc->cnt == cnt_invalid)
2027                                                 return (1);
2028                                 }
2029                                 break;
2030                         }
2031 #endif
2032                 default:
2033                         /* invalid address family */
2034                         cnt_invalid++;
2035                         if (asc->cnt == cnt_invalid)
2036                                 return (1);
2037                 }
2038         }
2039         return (0);
2040 }
2041
2042 static int
2043 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2044 {
2045         struct sctp_ifa *ifa;
2046         struct sctp_asconf_iterator *asc;
2047         struct sctp_laddr *laddr, *nladdr, *l;
2048
2049         /* Only for specific case not bound all */
2050         asc = (struct sctp_asconf_iterator *)ptr;
2051         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2052                 ifa = l->ifa;
2053                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2054                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2055                             sctp_nxt_addr) {
2056                                 if (laddr->ifa == ifa) {
2057                                         laddr->action = 0;
2058                                         break;
2059                                 }
2060                         }
2061                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2062                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2063                                 /* remove only after all guys are done */
2064                                 if (laddr->ifa == ifa) {
2065                                         sctp_del_local_addr_ep(inp, ifa);
2066                                 }
2067                         }
2068                 }
2069         }
2070         return (0);
2071 }
2072
2073 void
2074 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2075     void *ptr, uint32_t val SCTP_UNUSED)
2076 {
2077         struct sctp_asconf_iterator *asc;
2078         struct sctp_ifa *ifa;
2079         struct sctp_laddr *l;
2080         int cnt_invalid = 0;
2081         int type, status;
2082         int num_queued = 0;
2083
2084         asc = (struct sctp_asconf_iterator *)ptr;
2085         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2086                 ifa = l->ifa;
2087                 type = l->action;
2088
2089                 /* address's vrf_id must be the vrf_id of the assoc */
2090                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2091                         continue;
2092                 }
2093                 /* Same checks again for assoc */
2094                 switch (ifa->address.sa.sa_family) {
2095 #ifdef INET6
2096                 case AF_INET6:
2097                         {
2098                                 /* invalid if we're not a v6 endpoint */
2099                                 struct sockaddr_in6 *sin6;
2100
2101                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2102                                         cnt_invalid++;
2103                                         if (asc->cnt == cnt_invalid)
2104                                                 return;
2105                                         else
2106                                                 continue;
2107                                 }
2108                                 sin6 = &ifa->address.sin6;
2109                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2110                                         /* we skip unspecifed addresses */
2111                                         continue;
2112                                 }
2113                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2114                                     &sin6->sin6_addr) != 0) {
2115                                         continue;
2116                                 }
2117                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2118                                         if (stcb->asoc.scope.local_scope == 0) {
2119                                                 continue;
2120                                         }
2121                                         /* is it the right link local scope? */
2122                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2123                                                 continue;
2124                                         }
2125                                 }
2126                                 break;
2127                         }
2128 #endif
2129 #ifdef INET
2130                 case AF_INET:
2131                         {
2132                                 /* invalid if we are a v6 only endpoint */
2133                                 struct in6pcb *inp6;
2134                                 struct sockaddr_in *sin;
2135
2136                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2137                                 /* invalid if we are a v6 only endpoint */
2138                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2139                                     SCTP_IPV6_V6ONLY(inp6))
2140                                         continue;
2141
2142                                 sin = &ifa->address.sin;
2143                                 if (sin->sin_addr.s_addr == 0) {
2144                                         /* we skip unspecifed addresses */
2145                                         continue;
2146                                 }
2147                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2148                                     &sin->sin_addr) != 0) {
2149                                         continue;
2150                                 }
2151                                 if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2152                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2153                                         continue;
2154                                 }
2155                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2156                                     SCTP_IPV6_V6ONLY(inp6)) {
2157                                         cnt_invalid++;
2158                                         if (asc->cnt == cnt_invalid)
2159                                                 return;
2160                                         else
2161                                                 continue;
2162                                 }
2163                                 break;
2164                         }
2165 #endif
2166                 default:
2167                         /* invalid address family */
2168                         cnt_invalid++;
2169                         if (asc->cnt == cnt_invalid)
2170                                 return;
2171                         else
2172                                 continue;
2173                         break;
2174                 }
2175
2176                 if (type == SCTP_ADD_IP_ADDRESS) {
2177                         /* prevent this address from being used as a source */
2178                         sctp_add_local_addr_restricted(stcb, ifa);
2179                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2180                         struct sctp_nets *net;
2181
2182                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2183                                 sctp_rtentry_t *rt;
2184
2185                                 /* delete this address if cached */
2186                                 if (net->ro._s_addr == ifa) {
2187                                         sctp_free_ifa(net->ro._s_addr);
2188                                         net->ro._s_addr = NULL;
2189                                         net->src_addr_selected = 0;
2190                                         rt = net->ro.ro_rt;
2191                                         if (rt) {
2192                                                 RTFREE(rt);
2193                                                 net->ro.ro_rt = NULL;
2194                                         }
2195                                         /*
2196                                          * Now we deleted our src address,
2197                                          * should we not also now reset the
2198                                          * cwnd/rto to start as if its a new
2199                                          * address?
2200                                          */
2201                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2202                                         net->RTO = 0;
2203
2204                                 }
2205                         }
2206                 } else if (type == SCTP_SET_PRIM_ADDR) {
2207                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2208                                 /* must validate the ifa is in the ep */
2209                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2210                                         continue;
2211                                 }
2212                         } else {
2213                                 /* Need to check scopes for this guy */
2214                                 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2215                                         continue;
2216                                 }
2217                         }
2218                 }
2219                 /* queue an asconf for this address add/delete */
2220                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2221                     stcb->asoc.asconf_supported == 1) {
2222                         /* queue an asconf for this addr */
2223                         status = sctp_asconf_queue_add(stcb, ifa, type);
2224                         /*
2225                          * if queued ok, and in the open state, update the
2226                          * count of queued params.  If in the non-open
2227                          * state, these get sent when the assoc goes open.
2228                          */
2229                         if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
2230                             (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2231                                 if (status >= 0) {
2232                                         num_queued++;
2233                                 }
2234                         }
2235                 }
2236         }
2237         /*
2238          * If we have queued params in the open state, send out an ASCONF.
2239          */
2240         if (num_queued > 0) {
2241                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2242         }
2243 }
2244
2245 void
2246 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2247 {
2248         struct sctp_asconf_iterator *asc;
2249         struct sctp_ifa *ifa;
2250         struct sctp_laddr *l, *nl;
2251
2252         asc = (struct sctp_asconf_iterator *)ptr;
2253         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2254                 ifa = l->ifa;
2255                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2256                         /* Clear the defer use flag */
2257                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2258                 }
2259                 sctp_free_ifa(ifa);
2260                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2261                 SCTP_DECR_LADDR_COUNT();
2262         }
2263         SCTP_FREE(asc, SCTP_M_ASC_IT);
2264 }
2265
2266 /*
2267  * sa is the sockaddr to ask the peer to set primary to.
2268  * returns: 0 = completed, -1 = error
2269  */
2270 int32_t
2271 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2272 {
2273         uint32_t vrf_id;
2274         struct sctp_ifa *ifa;
2275
2276         /* find the ifa for the desired set primary */
2277         vrf_id = stcb->asoc.vrf_id;
2278         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2279         if (ifa == NULL) {
2280                 /* Invalid address */
2281                 return (-1);
2282         }
2283         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2284         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2285                 /* set primary queuing succeeded */
2286                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2287                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2288                     (void *)stcb);
2289                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2290                 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
2291                     (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2292 #ifdef SCTP_TIMER_BASED_ASCONF
2293                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2294                             stcb->sctp_ep, stcb,
2295                             stcb->asoc.primary_destination);
2296 #else
2297                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2298 #endif
2299                 }
2300         } else {
2301                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2302                     (void *)stcb);
2303                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2304                 return (-1);
2305         }
2306         return (0);
2307 }
2308
2309 void
2310 sctp_set_primary_ip_address(struct sctp_ifa *ifa)
2311 {
2312         struct sctp_inpcb *inp;
2313
2314         /* go through all our PCB's */
2315         LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
2316                 struct sctp_tcb *stcb;
2317
2318                 /* process for all associations for this endpoint */
2319                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2320                         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2321                         if (!sctp_asconf_queue_add(stcb, ifa,
2322                             SCTP_SET_PRIM_ADDR)) {
2323                                 /* set primary queuing succeeded */
2324                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ",
2325                                     (void *)stcb);
2326                                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa);
2327                                 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
2328                                     (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2329 #ifdef SCTP_TIMER_BASED_ASCONF
2330                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2331                                             stcb->sctp_ep, stcb,
2332                                             stcb->asoc.primary_destination);
2333 #else
2334                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2335 #endif
2336                                 }
2337                         }
2338                 }               /* for each stcb */
2339         }                       /* for each inp */
2340 }
2341
2342 int
2343 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2344 {
2345         struct sctp_tmit_chunk *chk, *nchk;
2346         unsigned int offset, asconf_limit;
2347         struct sctp_asconf_chunk *acp;
2348         struct sctp_asconf_paramhdr *aph;
2349         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2350         struct sctp_paramhdr *ph;
2351         int add_cnt, del_cnt;
2352         uint16_t last_param_type;
2353
2354         add_cnt = del_cnt = 0;
2355         last_param_type = 0;
2356         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2357                 if (chk->data == NULL) {
2358                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2359                         continue;
2360                 }
2361                 offset = 0;
2362                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2363                 offset += sizeof(struct sctp_asconf_chunk);
2364                 asconf_limit = ntohs(acp->ch.chunk_length);
2365                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2366                 if (ph == NULL) {
2367                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2368                         continue;
2369                 }
2370                 offset += ntohs(ph->param_length);
2371
2372                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2373                 if (aph == NULL) {
2374                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2375                         continue;
2376                 }
2377                 while (aph != NULL) {
2378                         unsigned int param_length, param_type;
2379
2380                         param_type = ntohs(aph->ph.param_type);
2381                         param_length = ntohs(aph->ph.param_length);
2382                         if (offset + param_length > asconf_limit) {
2383                                 /* parameter goes beyond end of chunk! */
2384                                 break;
2385                         }
2386                         if (param_length > sizeof(aparam_buf)) {
2387                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2388                                 break;
2389                         }
2390                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2391                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2392                                 break;
2393                         }
2394                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2395                         if (aph == NULL) {
2396                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2397                                 break;
2398                         }
2399                         ph = (struct sctp_paramhdr *)(aph + 1);
2400                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2401                                 switch (param_type) {
2402                                 case SCTP_ADD_IP_ADDRESS:
2403                                         add_cnt++;
2404                                         break;
2405                                 case SCTP_DEL_IP_ADDRESS:
2406                                         del_cnt++;
2407                                         break;
2408                                 default:
2409                                         break;
2410                                 }
2411                                 last_param_type = param_type;
2412                         }
2413                         offset += SCTP_SIZE32(param_length);
2414                         if (offset >= asconf_limit) {
2415                                 /* no more data in the mbuf chain */
2416                                 break;
2417                         }
2418                         /* get pointer to next asconf param */
2419                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2420                 }
2421         }
2422
2423         /*
2424          * we want to find the sequences which consist of ADD -> DEL -> ADD
2425          * or DEL -> ADD
2426          */
2427         if (add_cnt > del_cnt ||
2428             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2429                 return (1);
2430         }
2431         return (0);
2432 }
2433
2434 static struct sockaddr *
2435 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2436 {
2437         struct sctp_vrf *vrf = NULL;
2438         struct sctp_ifn *sctp_ifn;
2439         struct sctp_ifa *sctp_ifa;
2440
2441         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2442                 SCTP_IPI_ADDR_RLOCK();
2443         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2444         if (vrf == NULL) {
2445                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2446                         SCTP_IPI_ADDR_RUNLOCK();
2447                 return (NULL);
2448         }
2449         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2450                 if (stcb->asoc.scope.loopback_scope == 0 &&
2451                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2452                         /* Skip if loopback_scope not set */
2453                         continue;
2454                 }
2455                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2456                         switch (sctp_ifa->address.sa.sa_family) {
2457 #ifdef INET
2458                         case AF_INET:
2459                                 if (stcb->asoc.scope.ipv4_addr_legal) {
2460                                         struct sockaddr_in *sin;
2461
2462                                         sin = &sctp_ifa->address.sin;
2463                                         if (sin->sin_addr.s_addr == 0) {
2464                                                 /* skip unspecifed addresses */
2465                                                 continue;
2466                                         }
2467                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
2468                                             &sin->sin_addr) != 0) {
2469                                                 continue;
2470                                         }
2471                                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2472                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2473                                                 continue;
2474
2475                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2476                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2477                                                 continue;
2478                                         /*
2479                                          * found a valid local v4 address to
2480                                          * use
2481                                          */
2482                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2483                                                 SCTP_IPI_ADDR_RUNLOCK();
2484                                         return (&sctp_ifa->address.sa);
2485                                 }
2486                                 break;
2487 #endif
2488 #ifdef INET6
2489                         case AF_INET6:
2490                                 if (stcb->asoc.scope.ipv6_addr_legal) {
2491                                         struct sockaddr_in6 *sin6;
2492
2493                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2494                                                 continue;
2495                                         }
2496                                         sin6 = &sctp_ifa->address.sin6;
2497                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2498                                                 /*
2499                                                  * we skip unspecifed
2500                                                  * addresses
2501                                                  */
2502                                                 continue;
2503                                         }
2504                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
2505                                             &sin6->sin6_addr) != 0) {
2506                                                 continue;
2507                                         }
2508                                         if (stcb->asoc.scope.local_scope == 0 &&
2509                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2510                                                 continue;
2511                                         if (stcb->asoc.scope.site_scope == 0 &&
2512                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2513                                                 continue;
2514
2515                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2516                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2517                                                 continue;
2518                                         /*
2519                                          * found a valid local v6 address to
2520                                          * use
2521                                          */
2522                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2523                                                 SCTP_IPI_ADDR_RUNLOCK();
2524                                         return (&sctp_ifa->address.sa);
2525                                 }
2526                                 break;
2527 #endif
2528                         default:
2529                                 break;
2530                         }
2531                 }
2532         }
2533         /* no valid addresses found */
2534         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2535                 SCTP_IPI_ADDR_RUNLOCK();
2536         return (NULL);
2537 }
2538
2539 static struct sockaddr *
2540 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2541 {
2542         struct sctp_laddr *laddr;
2543
2544         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2545                 if (laddr->ifa == NULL) {
2546                         continue;
2547                 }
2548                 /* is the address restricted ? */
2549                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2550                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2551                         continue;
2552
2553                 /* found a valid local address to use */
2554                 return (&laddr->ifa->address.sa);
2555         }
2556         /* no valid addresses found */
2557         return (NULL);
2558 }
2559
2560 /*
2561  * builds an ASCONF chunk from queued ASCONF params.
2562  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2563  */
2564 struct mbuf *
2565 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2566 {
2567         struct mbuf *m_asconf, *m_asconf_chk;
2568         struct sctp_asconf_addr *aa;
2569         struct sctp_asconf_chunk *acp;
2570         struct sctp_asconf_paramhdr *aph;
2571         struct sctp_asconf_addr_param *aap;
2572         uint32_t p_length;
2573         uint32_t correlation_id = 1;    /* 0 is reserved... */
2574         caddr_t ptr, lookup_ptr;
2575         uint8_t lookup_used = 0;
2576
2577         /* are there any asconf params to send? */
2578         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2579                 if (aa->sent == 0)
2580                         break;
2581         }
2582         if (aa == NULL)
2583                 return (NULL);
2584
2585         /*
2586          * get a chunk header mbuf and a cluster for the asconf params since
2587          * it's simpler to fill in the asconf chunk header lookup address on
2588          * the fly
2589          */
2590         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA);
2591         if (m_asconf_chk == NULL) {
2592                 /* no mbuf's */
2593                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2594                     "compose_asconf: couldn't get chunk mbuf!\n");
2595                 return (NULL);
2596         }
2597         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
2598         if (m_asconf == NULL) {
2599                 /* no mbuf's */
2600                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2601                     "compose_asconf: couldn't get mbuf!\n");
2602                 sctp_m_freem(m_asconf_chk);
2603                 return (NULL);
2604         }
2605         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2606         SCTP_BUF_LEN(m_asconf) = 0;
2607         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2608         bzero(acp, sizeof(struct sctp_asconf_chunk));
2609         /* save pointers to lookup address and asconf params */
2610         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2611         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2612
2613         /* fill in chunk header info */
2614         acp->ch.chunk_type = SCTP_ASCONF;
2615         acp->ch.chunk_flags = 0;
2616         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2617         stcb->asoc.asconf_seq_out++;
2618
2619         /* add parameters... up to smallest MTU allowed */
2620         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2621                 if (aa->sent)
2622                         continue;
2623                 /* get the parameter length */
2624                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2625                 /* will it fit in current chunk? */
2626                 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) ||
2627                     (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) {
2628                         /* won't fit, so we're done with this chunk */
2629                         break;
2630                 }
2631                 /* assign (and store) a correlation id */
2632                 aa->ap.aph.correlation_id = correlation_id++;
2633
2634                 /*
2635                  * fill in address if we're doing a delete this is a simple
2636                  * way for us to fill in the correlation address, which
2637                  * should only be used by the peer if we're deleting our
2638                  * source address and adding a new address (e.g. renumbering
2639                  * case)
2640                  */
2641                 if (lookup_used == 0 &&
2642                     (aa->special_del == 0) &&
2643                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2644                         struct sctp_ipv6addr_param *lookup;
2645                         uint16_t p_size, addr_size;
2646
2647                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2648                         lookup->ph.param_type =
2649                             htons(aa->ap.addrp.ph.param_type);
2650                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2651                                 /* copy IPv6 address */
2652                                 p_size = sizeof(struct sctp_ipv6addr_param);
2653                                 addr_size = sizeof(struct in6_addr);
2654                         } else {
2655                                 /* copy IPv4 address */
2656                                 p_size = sizeof(struct sctp_ipv4addr_param);
2657                                 addr_size = sizeof(struct in_addr);
2658                         }
2659                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2660                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2661                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2662                         lookup_used = 1;
2663                 }
2664                 /* copy into current space */
2665                 memcpy(ptr, &aa->ap, p_length);
2666
2667                 /* network elements and update lengths */
2668                 aph = (struct sctp_asconf_paramhdr *)ptr;
2669                 aap = (struct sctp_asconf_addr_param *)ptr;
2670                 /* correlation_id is transparent to peer, no htonl needed */
2671                 aph->ph.param_type = htons(aph->ph.param_type);
2672                 aph->ph.param_length = htons(aph->ph.param_length);
2673                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2674                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2675
2676                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2677                 ptr += SCTP_SIZE32(p_length);
2678
2679                 /*
2680                  * these params are removed off the pending list upon
2681                  * getting an ASCONF-ACK back from the peer, just set flag
2682                  */
2683                 aa->sent = 1;
2684         }
2685         /* check to see if the lookup addr has been populated yet */
2686         if (lookup_used == 0) {
2687                 /* NOTE: if the address param is optional, can skip this... */
2688                 /* add any valid (existing) address... */
2689                 struct sctp_ipv6addr_param *lookup;
2690                 uint16_t p_size, addr_size;
2691                 struct sockaddr *found_addr;
2692                 caddr_t addr_ptr;
2693
2694                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2695                         found_addr = sctp_find_valid_localaddr(stcb,
2696                             addr_locked);
2697                 else
2698                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2699
2700                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2701                 if (found_addr != NULL) {
2702                         switch (found_addr->sa_family) {
2703 #ifdef INET6
2704                         case AF_INET6:
2705                                 /* copy IPv6 address */
2706                                 lookup->ph.param_type =
2707                                     htons(SCTP_IPV6_ADDRESS);
2708                                 p_size = sizeof(struct sctp_ipv6addr_param);
2709                                 addr_size = sizeof(struct in6_addr);
2710                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2711                                     found_addr)->sin6_addr;
2712                                 break;
2713 #endif
2714 #ifdef INET
2715                         case AF_INET:
2716                                 /* copy IPv4 address */
2717                                 lookup->ph.param_type =
2718                                     htons(SCTP_IPV4_ADDRESS);
2719                                 p_size = sizeof(struct sctp_ipv4addr_param);
2720                                 addr_size = sizeof(struct in_addr);
2721                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2722                                     found_addr)->sin_addr;
2723                                 break;
2724 #endif
2725                         default:
2726                                 p_size = 0;
2727                                 addr_size = 0;
2728                                 addr_ptr = NULL;
2729                                 break;
2730                         }
2731                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2732                         memcpy(lookup->addr, addr_ptr, addr_size);
2733                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2734                 } else {
2735                         /* uh oh... don't have any address?? */
2736                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2737                             "compose_asconf: no lookup addr!\n");
2738                         /* XXX for now, we send a IPv4 address of 0.0.0.0 */
2739                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2740                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2741                         bzero(lookup->addr, sizeof(struct in_addr));
2742                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2743                 }
2744         }
2745         /* chain it all together */
2746         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2747         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2748         acp->ch.chunk_length = htons(*retlen);
2749
2750         return (m_asconf_chk);
2751 }
2752
2753 /*
2754  * section to handle address changes before an association is up eg. changes
2755  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2756  */
2757
2758 /*
2759  * processes the (local) addresses in the INIT-ACK chunk
2760  */
2761 static void
2762 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2763     unsigned int offset, unsigned int length)
2764 {
2765         struct sctp_paramhdr tmp_param, *ph;
2766         uint16_t plen, ptype;
2767         struct sctp_ifa *sctp_ifa;
2768         union sctp_sockstore store;
2769
2770 #ifdef INET6
2771         struct sctp_ipv6addr_param addr6_store;
2772
2773 #endif
2774 #ifdef INET
2775         struct sctp_ipv4addr_param addr4_store;
2776
2777 #endif
2778
2779         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2780         if (stcb == NULL)       /* Un-needed check for SA */
2781                 return;
2782
2783         /* convert to upper bound */
2784         length += offset;
2785
2786         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2787                 return;
2788         }
2789         /* go through the addresses in the init-ack */
2790         ph = (struct sctp_paramhdr *)
2791             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2792             (uint8_t *) & tmp_param);
2793         while (ph != NULL) {
2794                 ptype = ntohs(ph->param_type);
2795                 plen = ntohs(ph->param_length);
2796                 switch (ptype) {
2797 #ifdef INET6
2798                 case SCTP_IPV6_ADDRESS:
2799                         {
2800                                 struct sctp_ipv6addr_param *a6p;
2801
2802                                 /* get the entire IPv6 address param */
2803                                 a6p = (struct sctp_ipv6addr_param *)
2804                                     sctp_m_getptr(m, offset,
2805                                     sizeof(struct sctp_ipv6addr_param),
2806                                     (uint8_t *) & addr6_store);
2807                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2808                                     a6p == NULL) {
2809                                         return;
2810                                 }
2811                                 memset(&store, 0, sizeof(union sctp_sockstore));
2812                                 store.sin6.sin6_family = AF_INET6;
2813                                 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2814                                 store.sin6.sin6_port = stcb->rport;
2815                                 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr));
2816                                 break;
2817                         }
2818 #endif
2819 #ifdef INET
2820                 case SCTP_IPV4_ADDRESS:
2821                         {
2822                                 struct sctp_ipv4addr_param *a4p;
2823
2824                                 /* get the entire IPv4 address param */
2825                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2826                                     sizeof(struct sctp_ipv4addr_param),
2827                                     (uint8_t *) & addr4_store);
2828                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2829                                     a4p == NULL) {
2830                                         return;
2831                                 }
2832                                 memset(&store, 0, sizeof(union sctp_sockstore));
2833                                 store.sin.sin_family = AF_INET;
2834                                 store.sin.sin_len = sizeof(struct sockaddr_in);
2835                                 store.sin.sin_port = stcb->rport;
2836                                 store.sin.sin_addr.s_addr = a4p->addr;
2837                                 break;
2838                         }
2839 #endif
2840                 default:
2841                         goto next_addr;
2842                 }
2843
2844                 /* see if this address really (still) exists */
2845                 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id,
2846                     SCTP_ADDR_NOT_LOCKED);
2847                 if (sctp_ifa == NULL) {
2848                         /* address doesn't exist anymore */
2849                         int status;
2850
2851                         /* are ASCONFs allowed ? */
2852                         if ((sctp_is_feature_on(stcb->sctp_ep,
2853                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2854                             stcb->asoc.asconf_supported) {
2855                                 /* queue an ASCONF DEL_IP_ADDRESS */
2856                                 status = sctp_asconf_queue_sa_delete(stcb, &store.sa);
2857                                 /*
2858                                  * if queued ok, and in correct state, send
2859                                  * out the ASCONF.
2860                                  */
2861                                 if (status == 0 &&
2862                                     SCTP_GET_STATE(&stcb->asoc) ==
2863                                     SCTP_STATE_OPEN) {
2864 #ifdef SCTP_TIMER_BASED_ASCONF
2865                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2866                                             stcb->sctp_ep, stcb,
2867                                             stcb->asoc.primary_destination);
2868 #else
2869                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2870 #endif
2871                                 }
2872                         }
2873                 }
2874 next_addr:
2875                 /*
2876                  * Sanity check:  Make sure the length isn't 0, otherwise
2877                  * we'll be stuck in this loop for a long time...
2878                  */
2879                 if (SCTP_SIZE32(plen) == 0) {
2880                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2881                             plen, ptype);
2882                         return;
2883                 }
2884                 /* get next parameter */
2885                 offset += SCTP_SIZE32(plen);
2886                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2887                         return;
2888                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2889                     sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2890         }                       /* while */
2891 }
2892
2893 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2894 /*
2895  * checks to see if a specific address is in the initack address list returns
2896  * 1 if found, 0 if not
2897  */
2898 static uint32_t
2899 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
2900 {
2901         struct sctp_paramhdr tmp_param, *ph;
2902         uint16_t plen, ptype;
2903
2904 #ifdef INET
2905         struct sockaddr_in *sin;
2906         struct sctp_ipv4addr_param *a4p;
2907         struct sctp_ipv6addr_param addr4_store;
2908
2909 #endif
2910 #ifdef INET6
2911         struct sockaddr_in6 *sin6;
2912         struct sctp_ipv6addr_param *a6p;
2913         struct sctp_ipv6addr_param addr6_store;
2914         struct sockaddr_in6 sin6_tmp;
2915
2916 #endif
2917
2918         switch (sa->sa_family) {
2919 #ifdef INET
2920         case AF_INET:
2921                 break;
2922 #endif
2923 #ifdef INET6
2924         case AF_INET6:
2925                 break;
2926 #endif
2927         default:
2928                 return (0);
2929         }
2930
2931         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2932         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2933         /* convert to upper bound */
2934         length += offset;
2935
2936         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2937                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2938                     "find_initack_addr: invalid offset?\n");
2939                 return (0);
2940         }
2941         /* go through the addresses in the init-ack */
2942         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2943             sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2944         while (ph != NULL) {
2945                 ptype = ntohs(ph->param_type);
2946                 plen = ntohs(ph->param_length);
2947                 switch (ptype) {
2948 #ifdef INET6
2949                 case SCTP_IPV6_ADDRESS:
2950                         if (sa->sa_family == AF_INET6) {
2951                                 /* get the entire IPv6 address param */
2952                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
2953                                         break;
2954                                 }
2955                                 /* get the entire IPv6 address param */
2956                                 a6p = (struct sctp_ipv6addr_param *)
2957                                     sctp_m_getptr(m, offset,
2958                                     sizeof(struct sctp_ipv6addr_param),
2959                                     (uint8_t *) & addr6_store);
2960                                 if (a6p == NULL) {
2961                                         return (0);
2962                                 }
2963                                 sin6 = (struct sockaddr_in6 *)sa;
2964                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2965                                         /* create a copy and clear scope */
2966                                         memcpy(&sin6_tmp, sin6,
2967                                             sizeof(struct sockaddr_in6));
2968                                         sin6 = &sin6_tmp;
2969                                         in6_clearscope(&sin6->sin6_addr);
2970                                 }
2971                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
2972                                     sizeof(struct in6_addr)) == 0) {
2973                                         /* found it */
2974                                         return (1);
2975                                 }
2976                         }
2977                         break;
2978 #endif                          /* INET6 */
2979 #ifdef INET
2980                 case SCTP_IPV4_ADDRESS:
2981                         if (sa->sa_family == AF_INET) {
2982                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
2983                                         break;
2984                                 }
2985                                 /* get the entire IPv4 address param */
2986                                 a4p = (struct sctp_ipv4addr_param *)
2987                                     sctp_m_getptr(m, offset,
2988                                     sizeof(struct sctp_ipv4addr_param),
2989                                     (uint8_t *) & addr4_store);
2990                                 if (a4p == NULL) {
2991                                         return (0);
2992                                 }
2993                                 sin = (struct sockaddr_in *)sa;
2994                                 if (sin->sin_addr.s_addr == a4p->addr) {
2995                                         /* found it */
2996                                         return (1);
2997                                 }
2998                         }
2999                         break;
3000 #endif
3001                 default:
3002                         break;
3003                 }
3004                 /* get next parameter */
3005                 offset += SCTP_SIZE32(plen);
3006                 if (offset + sizeof(struct sctp_paramhdr) > length) {
3007                         return (0);
3008                 }
3009                 ph = (struct sctp_paramhdr *)
3010                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
3011                     (uint8_t *) & tmp_param);
3012         }                       /* while */
3013         /* not found! */
3014         return (0);
3015 }
3016
3017 /*
3018  * makes sure that the current endpoint local addr list is consistent with
3019  * the new association (eg. subset bound, asconf allowed) adds addresses as
3020  * necessary
3021  */
3022 static void
3023 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3024     int length, struct sockaddr *init_addr)
3025 {
3026         struct sctp_laddr *laddr;
3027
3028         /* go through the endpoint list */
3029         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3030                 /* be paranoid and validate the laddr */
3031                 if (laddr->ifa == NULL) {
3032                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3033                             "check_addr_list_ep: laddr->ifa is NULL");
3034                         continue;
3035                 }
3036                 if (laddr->ifa == NULL) {
3037                         SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3038                         continue;
3039                 }
3040                 /* do i have it implicitly? */
3041                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3042                         continue;
3043                 }
3044                 /* check to see if in the init-ack */
3045                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3046                         /* try to add it */
3047                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3048                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3049                 }
3050         }
3051 }
3052
3053 /*
3054  * makes sure that the current kernel address list is consistent with the new
3055  * association (with all addrs bound) adds addresses as necessary
3056  */
3057 static void
3058 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3059     int length, struct sockaddr *init_addr,
3060     uint16_t local_scope, uint16_t site_scope,
3061     uint16_t ipv4_scope, uint16_t loopback_scope)
3062 {
3063         struct sctp_vrf *vrf = NULL;
3064         struct sctp_ifn *sctp_ifn;
3065         struct sctp_ifa *sctp_ifa;
3066         uint32_t vrf_id;
3067
3068 #ifdef INET
3069         struct sockaddr_in *sin;
3070
3071 #endif
3072 #ifdef INET6
3073         struct sockaddr_in6 *sin6;
3074
3075 #endif
3076
3077         if (stcb) {
3078                 vrf_id = stcb->asoc.vrf_id;
3079         } else {
3080                 return;
3081         }
3082         SCTP_IPI_ADDR_RLOCK();
3083         vrf = sctp_find_vrf(vrf_id);
3084         if (vrf == NULL) {
3085                 SCTP_IPI_ADDR_RUNLOCK();
3086                 return;
3087         }
3088         /* go through all our known interfaces */
3089         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3090                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3091                         /* skip loopback interface */
3092                         continue;
3093                 }
3094                 /* go through each interface address */
3095                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3096                         /* do i have it implicitly? */
3097                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3098                                 continue;
3099                         }
3100                         switch (sctp_ifa->address.sa.sa_family) {
3101 #ifdef INET
3102                         case AF_INET:
3103                                 sin = &sctp_ifa->address.sin;
3104                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3105                                     &sin->sin_addr) != 0) {
3106                                         continue;
3107                                 }
3108                                 if ((ipv4_scope == 0) &&
3109                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3110                                         /* private address not in scope */
3111                                         continue;
3112                                 }
3113                                 break;
3114 #endif
3115 #ifdef INET6
3116                         case AF_INET6:
3117                                 sin6 = &sctp_ifa->address.sin6;
3118                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3119                                     &sin6->sin6_addr) != 0) {
3120                                         continue;
3121                                 }
3122                                 if ((local_scope == 0) &&
3123                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3124                                         continue;
3125                                 }
3126                                 if ((site_scope == 0) &&
3127                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3128                                         continue;
3129                                 }
3130                                 break;
3131 #endif
3132                         default:
3133                                 break;
3134                         }
3135                         /* check to see if in the init-ack */
3136                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3137                                 /* try to add it */
3138                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3139                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3140                                     SCTP_ADDR_LOCKED);
3141                         }
3142                 }               /* end foreach ifa */
3143         }                       /* end foreach ifn */
3144         SCTP_IPI_ADDR_RUNLOCK();
3145 }
3146
3147 /*
3148  * validates an init-ack chunk (from a cookie-echo) with current addresses
3149  * adds addresses from the init-ack into our local address list, if needed
3150  * queues asconf adds/deletes addresses as needed and makes appropriate list
3151  * changes for source address selection m, offset: points to the start of the
3152  * address list in an init-ack chunk length: total length of the address
3153  * params only init_addr: address where my INIT-ACK was sent from
3154  */
3155 void
3156 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3157     int length, struct sockaddr *init_addr,
3158     uint16_t local_scope, uint16_t site_scope,
3159     uint16_t ipv4_scope, uint16_t loopback_scope)
3160 {
3161         /* process the local addresses in the initack */
3162         sctp_process_initack_addresses(stcb, m, offset, length);
3163
3164         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3165                 /* bound all case */
3166                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3167                     local_scope, site_scope, ipv4_scope, loopback_scope);
3168         } else {
3169                 /* subset bound case */
3170                 if (sctp_is_feature_on(stcb->sctp_ep,
3171                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3172                         /* asconf's allowed */
3173                         sctp_check_address_list_ep(stcb, m, offset, length,
3174                             init_addr);
3175                 }
3176                 /* else, no asconfs allowed, so what we sent is what we get */
3177         }
3178 }
3179
3180 /*
3181  * sctp_bindx() support
3182  */
3183 uint32_t
3184 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3185     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3186 {
3187         struct sctp_ifa *ifa;
3188         struct sctp_laddr *laddr, *nladdr;
3189
3190         if (sa->sa_len == 0) {
3191                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3192                 return (EINVAL);
3193         }
3194         if (sctp_ifap) {
3195                 ifa = sctp_ifap;
3196         } else if (type == SCTP_ADD_IP_ADDRESS) {
3197                 /* For an add the address MUST be on the system */
3198                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3199         } else if (type == SCTP_DEL_IP_ADDRESS) {
3200                 /* For a delete we need to find it in the inp */
3201                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3202         } else {
3203                 ifa = NULL;
3204         }
3205         if (ifa != NULL) {
3206                 if (type == SCTP_ADD_IP_ADDRESS) {
3207                         sctp_add_local_addr_ep(inp, ifa, type);
3208                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3209                         if (inp->laddr_count < 2) {
3210                                 /* can't delete the last local address */
3211                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3212                                 return (EINVAL);
3213                         }
3214                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3215                             sctp_nxt_addr) {
3216                                 if (ifa == laddr->ifa) {
3217                                         /* Mark in the delete */
3218                                         laddr->action = type;
3219                                 }
3220                         }
3221                 }
3222                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3223                         /*
3224                          * There is no need to start the iterator if the inp
3225                          * has no associations.
3226                          */
3227                         if (type == SCTP_DEL_IP_ADDRESS) {
3228                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3229                                         if (laddr->ifa == ifa) {
3230                                                 sctp_del_local_addr_ep(inp, ifa);
3231                                         }
3232                                 }
3233                         }
3234                 } else {
3235                         struct sctp_asconf_iterator *asc;
3236                         struct sctp_laddr *wi;
3237
3238                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3239                             sizeof(struct sctp_asconf_iterator),
3240                             SCTP_M_ASC_IT);
3241                         if (asc == NULL) {
3242                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3243                                 return (ENOMEM);
3244                         }
3245                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3246                         if (wi == NULL) {
3247                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3248                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3249                                 return (ENOMEM);
3250                         }
3251                         LIST_INIT(&asc->list_of_work);
3252                         asc->cnt = 1;
3253                         SCTP_INCR_LADDR_COUNT();
3254                         wi->ifa = ifa;
3255                         wi->action = type;
3256                         atomic_add_int(&ifa->refcount, 1);
3257                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3258                         (void)sctp_initiate_iterator(sctp_asconf_iterator_ep,
3259                             sctp_asconf_iterator_stcb,
3260                             sctp_asconf_iterator_ep_end,
3261                             SCTP_PCB_ANY_FLAGS,
3262                             SCTP_PCB_ANY_FEATURES,
3263                             SCTP_ASOC_ANY_STATE,
3264                             (void *)asc, 0,
3265                             sctp_asconf_iterator_end, inp, 0);
3266                 }
3267                 return (0);
3268         } else {
3269                 /* invalid address! */
3270                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3271                 return (EADDRNOTAVAIL);
3272         }
3273 }
3274
3275 void
3276 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3277     struct sctp_nets *net)
3278 {
3279         struct sctp_asconf_addr *aa;
3280         struct sctp_ifa *sctp_ifap;
3281         struct sctp_asconf_tag_param *vtag;
3282
3283 #ifdef INET
3284         struct sockaddr_in *to;
3285
3286 #endif
3287 #ifdef INET6
3288         struct sockaddr_in6 *to6;
3289
3290 #endif
3291         if (net == NULL) {
3292                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3293                 return;
3294         }
3295         if (stcb == NULL) {
3296                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3297                 return;
3298         }
3299         /*
3300          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3301          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3302          */
3303         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3304             SCTP_M_ASC_ADDR);
3305         if (aa == NULL) {
3306                 /* didn't get memory */
3307                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3308                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3309                 return;
3310         }
3311         aa->special_del = 0;
3312         /* fill in asconf address parameter fields */
3313         /* top level elements are "networked" during send */
3314         aa->ifa = NULL;
3315         aa->sent = 0;           /* clear sent flag */
3316         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3317         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3318         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3319         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3320         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3321         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3322
3323         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3324             SCTP_M_ASC_ADDR);
3325         if (aa == NULL) {
3326                 /* didn't get memory */
3327                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3328                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3329                 return;
3330         }
3331         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3332         /* fill in asconf address parameter fields */
3333         /* ADD(0.0.0.0) */
3334         switch (net->ro._l_addr.sa.sa_family) {
3335 #ifdef INET
3336         case AF_INET:
3337                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3338                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3339                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3340                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3341                 /* No need to add an address, we are using 0.0.0.0 */
3342                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3343                 break;
3344 #endif
3345 #ifdef INET6
3346         case AF_INET6:
3347                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3348                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3349                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3350                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3351                 /* No need to add an address, we are using 0.0.0.0 */
3352                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3353                 break;
3354 #endif
3355         default:
3356                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3357                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3358                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3359                 return;
3360         }
3361         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3362             SCTP_M_ASC_ADDR);
3363         if (aa == NULL) {
3364                 /* didn't get memory */
3365                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3366                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3367                 return;
3368         }
3369         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3370         /* fill in asconf address parameter fields */
3371         /* ADD(0.0.0.0) */
3372         switch (net->ro._l_addr.sa.sa_family) {
3373 #ifdef INET
3374         case AF_INET:
3375                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3376                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3377                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3378                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3379                 /* No need to add an address, we are using 0.0.0.0 */
3380                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3381                 break;
3382 #endif
3383 #ifdef INET6
3384         case AF_INET6:
3385                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3386                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3387                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3388                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3389                 /* No need to add an address, we are using 0.0.0.0 */
3390                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3391                 break;
3392 #endif
3393         default:
3394                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3395                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3396                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3397                 return;
3398         }
3399         /* Now we must hunt the addresses and add all global addresses */
3400         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3401                 struct sctp_vrf *vrf = NULL;
3402                 struct sctp_ifn *sctp_ifnp;
3403                 uint32_t vrf_id;
3404
3405                 vrf_id = stcb->sctp_ep->def_vrf_id;
3406                 vrf = sctp_find_vrf(vrf_id);
3407                 if (vrf == NULL) {
3408                         goto skip_rest;
3409                 }
3410                 SCTP_IPI_ADDR_RLOCK();
3411                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3412                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3413                                 switch (sctp_ifap->address.sa.sa_family) {
3414 #ifdef INET
3415                                 case AF_INET:
3416                                         to = &sctp_ifap->address.sin;
3417                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3418                                             &to->sin_addr) != 0) {
3419                                                 continue;
3420                                         }
3421                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3422                                                 continue;
3423                                         }
3424                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3425                                                 continue;
3426                                         }
3427                                         break;
3428 #endif
3429 #ifdef INET6
3430                                 case AF_INET6:
3431                                         to6 = &sctp_ifap->address.sin6;
3432                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3433                                             &to6->sin6_addr) != 0) {
3434                                                 continue;
3435                                         }
3436                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3437                                                 continue;
3438                                         }
3439                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3440                                                 continue;
3441                                         }
3442                                         break;
3443 #endif
3444                                 default:
3445                                         continue;
3446                                 }
3447                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3448                         }
3449                 }
3450                 SCTP_IPI_ADDR_RUNLOCK();
3451         } else {
3452                 struct sctp_laddr *laddr;
3453
3454                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3455                         if (laddr->ifa == NULL) {
3456                                 continue;
3457                         }
3458                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3459                                 /*
3460                                  * Address being deleted by the system, dont
3461                                  * list.
3462                                  */
3463                                 continue;
3464                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3465                                 /*
3466                                  * Address being deleted on this ep don't
3467                                  * list.
3468                                  */
3469                                 continue;
3470                         }
3471                         sctp_ifap = laddr->ifa;
3472                         switch (sctp_ifap->address.sa.sa_family) {
3473 #ifdef INET
3474                         case AF_INET:
3475                                 to = &sctp_ifap->address.sin;
3476                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3477                                         continue;
3478                                 }
3479                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3480                                         continue;
3481                                 }
3482                                 break;
3483 #endif
3484 #ifdef INET6
3485                         case AF_INET6:
3486                                 to6 = &sctp_ifap->address.sin6;
3487                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3488                                         continue;
3489                                 }
3490                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3491                                         continue;
3492                                 }
3493                                 break;
3494 #endif
3495                         default:
3496                                 continue;
3497                         }
3498                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3499                 }
3500         }
3501 skip_rest:
3502         /* Now we must send the asconf into the queue */
3503         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3504 }