sys/netinet/sctp_asconf.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <netinet/sctp_var.h>
  40 #include <netinet/sctp_sysctl.h>
  41 #include <netinet/sctp_pcb.h>
  42 #include <netinet/sctp_header.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp_output.h>
  45 #include <netinet/sctp_asconf.h>
  46 #include <netinet/sctp_timer.h>
  47
  48 /*
  49  * debug flags:
  50  * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
  51  * SCTP_DEBUG_ASCONF2: detailed info
  52  */
  53
  54 /*
  55  * RFC 5061
  56  *
  57  * An ASCONF parameter queue exists per asoc which holds the pending address
  58  * operations.  Lists are updated upon receipt of ASCONF-ACK.
  59  *
  60  * A restricted_addrs list exists per assoc to hold local addresses that are
  61  * not (yet) usable by the assoc as a source address.  These addresses are
  62  * either pending an ASCONF operation (and exist on the ASCONF parameter
  63  * queue), or they are permanently restricted (the peer has returned an
  64  * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
  65  *
  66  * Deleted addresses are always immediately removed from the lists as they will
  67  * (shortly) no longer exist in the kernel.  We send ASCONFs as a courtesy,
  68  * only if allowed.
  69  */
  70
  71 /*
  72  * ASCONF parameter processing.
  73  * response_required: set if a reply is required (eg. SUCCESS_REPORT).
  74  * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
  75  * FIX: allocating this many mbufs on the fly is pretty inefficient...
  76  */
  77 static struct mbuf *
  78 sctp_asconf_success_response(uint32_t id)
  79 {
  80         struct mbuf *m_reply = NULL;
  81         struct sctp_asconf_paramhdr *aph;
  82
  83         m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
  84             0, M_NOWAIT, 1, MT_DATA);
  85         if (m_reply == NULL) {
  86                 SCTPDBG(SCTP_DEBUG_ASCONF1,
  87                     "asconf_success_response: couldn't get mbuf!\n");
  88                 return (NULL);
  89         }
  90         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
  91         aph->correlation_id = id;
  92         aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
  93         aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
  94         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
  95         aph->ph.param_length = htons(aph->ph.param_length);
  96
  97         return (m_reply);
  98 }
  99
 100 static struct mbuf *
 101 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv,
 102     uint16_t tlv_length)
 103 {
 104         struct mbuf *m_reply = NULL;
 105         struct sctp_asconf_paramhdr *aph;
 106         struct sctp_error_cause *error;
 107         uint32_t buf_len;
 108         uint16_t i, param_length, cause_length, padding_length;
 109         uint8_t *tlv;
 110
 111         if (error_tlv == NULL) {
 112                 tlv_length = 0;
 113         }
 114         cause_length = sizeof(struct sctp_error_cause) + tlv_length;
 115         param_length = sizeof(struct sctp_asconf_paramhdr) + cause_length;
 116         padding_length = tlv_length % 4;
 117         if (padding_length != 0) {
 118                 padding_length = 4 - padding_length;
 119         }
 120         buf_len = param_length + padding_length;
 121         if (buf_len > MLEN) {
 122                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 123                     "asconf_error_response: tlv_length (%xh) too big\n",
 124                     tlv_length);
 125                 return (NULL);
 126         }
 127         m_reply = sctp_get_mbuf_for_msg(buf_len, 0, M_NOWAIT, 1, MT_DATA);
 128         if (m_reply == NULL) {
 129                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 130                     "asconf_error_response: couldn't get mbuf!\n");
 131                 return (NULL);
 132         }
 133         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 134         aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
 135         aph->ph.param_length = htons(param_length);
 136         aph->correlation_id = id;
 137         error = (struct sctp_error_cause *)(aph + 1);
 138         error->code = htons(cause);
 139         error->length = htons(cause_length);
 140         if (error_tlv != NULL) {
 141                 tlv = (uint8_t *)(error + 1);
 142                 memcpy(tlv, error_tlv, tlv_length);
 143                 for (i = 0; i < padding_length; i++) {
 144                         tlv[tlv_length + i] = 0;
 145                 }
 146         }
 147         SCTP_BUF_LEN(m_reply) = buf_len;
 148         return (m_reply);
 149 }
 150
 151 static struct mbuf *
 152 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph,
 153     struct sctp_tcb *stcb, int send_hb, int response_required)
 154 {
 155         struct sctp_nets *net;
 156         struct mbuf *m_reply = NULL;
 157         union sctp_sockstore store;
 158         struct sctp_paramhdr *ph;
 159         uint16_t param_type, aparam_length;
 160 #if defined(INET) || defined(INET6)
 161         uint16_t param_length;
 162 #endif
 163         struct sockaddr *sa;
 164         int zero_address = 0;
 165         int bad_address = 0;
 166 #ifdef INET
 167         struct sockaddr_in *sin;
 168         struct sctp_ipv4addr_param *v4addr;
 169 #endif
 170 #ifdef INET6
 171         struct sockaddr_in6 *sin6;
 172         struct sctp_ipv6addr_param *v6addr;
 173 #endif
 174
 175         aparam_length = ntohs(aph->ph.param_length);
 176         if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) {
 177                 return (NULL);
 178         }
 179         ph = (struct sctp_paramhdr *)(aph + 1);
 180         param_type = ntohs(ph->param_type);
 181 #if defined(INET) || defined(INET6)
 182         param_length = ntohs(ph->param_length);
 183         if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) {
 184                 return (NULL);
 185         }
 186 #endif
 187         sa = &store.sa;
 188         switch (param_type) {
 189 #ifdef INET
 190         case SCTP_IPV4_ADDRESS:
 191                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 192                         /* invalid param size */
 193                         return (NULL);
 194                 }
 195                 v4addr = (struct sctp_ipv4addr_param *)ph;
 196                 sin = &store.sin;
 197                 memset(sin, 0, sizeof(*sin));
 198                 sin->sin_family = AF_INET;
 199                 sin->sin_len = sizeof(struct sockaddr_in);
 200                 sin->sin_port = stcb->rport;
 201                 sin->sin_addr.s_addr = v4addr->addr;
 202                 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 203                     IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 204                         bad_address = 1;
 205                 }
 206                 if (sin->sin_addr.s_addr == INADDR_ANY)
 207                         zero_address = 1;
 208                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 209                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 210                 break;
 211 #endif
 212 #ifdef INET6
 213         case SCTP_IPV6_ADDRESS:
 214                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 215                         /* invalid param size */
 216                         return (NULL);
 217                 }
 218                 v6addr = (struct sctp_ipv6addr_param *)ph;
 219                 sin6 = &store.sin6;
 220                 memset(sin6, 0, sizeof(*sin6));
 221                 sin6->sin6_family = AF_INET6;
 222                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 223                 sin6->sin6_port = stcb->rport;
 224                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 225                     sizeof(struct in6_addr));
 226                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 227                         bad_address = 1;
 228                 }
 229                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 230                         zero_address = 1;
 231                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 232                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 233                 break;
 234 #endif
 235         default:
 236                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 237                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph,
 238                     aparam_length);
 239                 return (m_reply);
 240         }                       /* end switch */
 241
 242         /* if 0.0.0.0/::0, add the source address instead */
 243         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 244                 sa = src;
 245                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 246                     "process_asconf_add_ip: using source addr ");
 247                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 248         }
 249         net = NULL;
 250         /* add the address */
 251         if (bad_address) {
 252                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 253                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph,
 254                     aparam_length);
 255         } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port,
 256                     SCTP_DONOT_SETSCOPE,
 257             SCTP_ADDR_DYNAMIC_ADDED) != 0) {
 258                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 259                     "process_asconf_add_ip: error adding address\n");
 260                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 261                     SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *)aph,
 262                     aparam_length);
 263         } else {
 264                 if (response_required) {
 265                         m_reply =
 266                             sctp_asconf_success_response(aph->correlation_id);
 267                 }
 268                 if (net != NULL) {
 269                         /* notify upper layer */
 270                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 271                         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
 272                         sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
 273                             stcb, net);
 274                         if (send_hb) {
 275                                 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 276                         }
 277                 }
 278         }
 279         return (m_reply);
 280 }
 281
 282 static int
 283 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
 284 {
 285         struct sctp_nets *src_net, *net, *nnet;
 286
 287         /* make sure the source address exists as a destination net */
 288         src_net = sctp_findnet(stcb, src);
 289         if (src_net == NULL) {
 290                 /* not found */
 291                 return (-1);
 292         }
 293
 294         /* delete all destination addresses except the source */
 295         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
 296                 if (net != src_net) {
 297                         /* delete this address */
 298                         SCTPDBG(SCTP_DEBUG_ASCONF1,
 299                             "asconf_del_remote_addrs_except: deleting ");
 300                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
 301                             (struct sockaddr *)&net->ro._l_addr);
 302                         /* notify upper layer */
 303                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
 304                             (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
 305                         sctp_remove_net(stcb, net);
 306                 }
 307         }
 308         return (0);
 309 }
 310
 311 static struct mbuf *
 312 sctp_process_asconf_delete_ip(struct sockaddr *src,
 313     struct sctp_asconf_paramhdr *aph,
 314     struct sctp_tcb *stcb, int response_required)
 315 {
 316         struct mbuf *m_reply = NULL;
 317         union sctp_sockstore store;
 318         struct sctp_paramhdr *ph;
 319         uint16_t param_type, aparam_length;
 320 #if defined(INET) || defined(INET6)
 321         uint16_t param_length;
 322 #endif
 323         struct sockaddr *sa;
 324         int zero_address = 0;
 325         int result;
 326 #ifdef INET
 327         struct sockaddr_in *sin;
 328         struct sctp_ipv4addr_param *v4addr;
 329 #endif
 330 #ifdef INET6
 331         struct sockaddr_in6 *sin6;
 332         struct sctp_ipv6addr_param *v6addr;
 333 #endif
 334
 335         aparam_length = ntohs(aph->ph.param_length);
 336         if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) {
 337                 return (NULL);
 338         }
 339         ph = (struct sctp_paramhdr *)(aph + 1);
 340         param_type = ntohs(ph->param_type);
 341 #if defined(INET) || defined(INET6)
 342         param_length = ntohs(ph->param_length);
 343         if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) {
 344                 return (NULL);
 345         }
 346 #endif
 347         sa = &store.sa;
 348         switch (param_type) {
 349 #ifdef INET
 350         case SCTP_IPV4_ADDRESS:
 351                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 352                         /* invalid param size */
 353                         return (NULL);
 354                 }
 355                 v4addr = (struct sctp_ipv4addr_param *)ph;
 356                 sin = &store.sin;
 357                 memset(sin, 0, sizeof(*sin));
 358                 sin->sin_family = AF_INET;
 359                 sin->sin_len = sizeof(struct sockaddr_in);
 360                 sin->sin_port = stcb->rport;
 361                 sin->sin_addr.s_addr = v4addr->addr;
 362                 if (sin->sin_addr.s_addr == INADDR_ANY)
 363                         zero_address = 1;
 364                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 365                     "process_asconf_delete_ip: deleting ");
 366                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 367                 break;
 368 #endif
 369 #ifdef INET6
 370         case SCTP_IPV6_ADDRESS:
 371                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 372                         /* invalid param size */
 373                         return (NULL);
 374                 }
 375                 v6addr = (struct sctp_ipv6addr_param *)ph;
 376                 sin6 = &store.sin6;
 377                 memset(sin6, 0, sizeof(*sin6));
 378                 sin6->sin6_family = AF_INET6;
 379                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 380                 sin6->sin6_port = stcb->rport;
 381                 memcpy(&sin6->sin6_addr, v6addr->addr,
 382                     sizeof(struct in6_addr));
 383                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 384                         zero_address = 1;
 385                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 386                     "process_asconf_delete_ip: deleting ");
 387                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 388                 break;
 389 #endif
 390         default:
 391                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 392                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 393                     aparam_length);
 394                 return (m_reply);
 395         }
 396
 397         /* make sure the source address is not being deleted */
 398         if (sctp_cmpaddr(sa, src)) {
 399                 /* trying to delete the source address! */
 400                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
 401                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 402                     SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph,
 403                     aparam_length);
 404                 return (m_reply);
 405         }
 406
 407         /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
 408         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 409                 result = sctp_asconf_del_remote_addrs_except(stcb, src);
 410
 411                 if (result) {
 412                         /* src address did not exist? */
 413                         SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
 414                         /* what error to reply with?? */
 415                         m_reply =
 416                             sctp_asconf_error_response(aph->correlation_id,
 417                             SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph,
 418                             aparam_length);
 419                 } else if (response_required) {
 420                         m_reply =
 421                             sctp_asconf_success_response(aph->correlation_id);
 422                 }
 423                 return (m_reply);
 424         }
 425
 426         /* delete the address */
 427         result = sctp_del_remote_addr(stcb, sa);
 428         /*
 429          * note if result == -2, the address doesn't exist in the asoc but
 430          * since it's being deleted anyways, we just ack the delete -- but
 431          * this probably means something has already gone awry
 432          */
 433         if (result == -1) {
 434                 /* only one address in the asoc */
 435                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
 436                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 437                     SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph,
 438                     aparam_length);
 439         } else {
 440                 if (response_required) {
 441                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 442                 }
 443                 /* notify upper layer */
 444                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 445         }
 446         return (m_reply);
 447 }
 448
 449 static struct mbuf *
 450 sctp_process_asconf_set_primary(struct sockaddr *src,
 451     struct sctp_asconf_paramhdr *aph,
 452     struct sctp_tcb *stcb, int response_required)
 453 {
 454         struct mbuf *m_reply = NULL;
 455         union sctp_sockstore store;
 456         struct sctp_paramhdr *ph;
 457         uint16_t param_type, aparam_length;
 458 #if defined(INET) || defined(INET6)
 459         uint16_t param_length;
 460 #endif
 461         struct sockaddr *sa;
 462         int zero_address = 0;
 463 #ifdef INET
 464         struct sockaddr_in *sin;
 465         struct sctp_ipv4addr_param *v4addr;
 466 #endif
 467 #ifdef INET6
 468         struct sockaddr_in6 *sin6;
 469         struct sctp_ipv6addr_param *v6addr;
 470 #endif
 471
 472         aparam_length = ntohs(aph->ph.param_length);
 473         if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) {
 474                 return (NULL);
 475         }
 476         ph = (struct sctp_paramhdr *)(aph + 1);
 477         param_type = ntohs(ph->param_type);
 478 #if defined(INET) || defined(INET6)
 479         param_length = ntohs(ph->param_length);
 480         if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) {
 481                 return (NULL);
 482         }
 483 #endif
 484         sa = &store.sa;
 485         switch (param_type) {
 486 #ifdef INET
 487         case SCTP_IPV4_ADDRESS:
 488                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 489                         /* invalid param size */
 490                         return (NULL);
 491                 }
 492                 v4addr = (struct sctp_ipv4addr_param *)ph;
 493                 sin = &store.sin;
 494                 memset(sin, 0, sizeof(*sin));
 495                 sin->sin_family = AF_INET;
 496                 sin->sin_len = sizeof(struct sockaddr_in);
 497                 sin->sin_addr.s_addr = v4addr->addr;
 498                 if (sin->sin_addr.s_addr == INADDR_ANY)
 499                         zero_address = 1;
 500                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 501                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 502                 break;
 503 #endif
 504 #ifdef INET6
 505         case SCTP_IPV6_ADDRESS:
 506                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 507                         /* invalid param size */
 508                         return (NULL);
 509                 }
 510                 v6addr = (struct sctp_ipv6addr_param *)ph;
 511                 sin6 = &store.sin6;
 512                 memset(sin6, 0, sizeof(*sin6));
 513                 sin6->sin6_family = AF_INET6;
 514                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 515                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 516                     sizeof(struct in6_addr));
 517                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 518                         zero_address = 1;
 519                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 520                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 521                 break;
 522 #endif
 523         default:
 524                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 525                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 526                     aparam_length);
 527                 return (m_reply);
 528         }
 529
 530         /* if 0.0.0.0/::0, use the source address instead */
 531         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 532                 sa = src;
 533                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 534                     "process_asconf_set_primary: using source addr ");
 535                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 536         }
 537         /* set the primary address */
 538         if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
 539                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 540                     "process_asconf_set_primary: primary address set\n");
 541                 /* notify upper layer */
 542                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 543                 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) &&
 544                     (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) &&
 545                     (stcb->asoc.alternate)) {
 546                         sctp_free_remote_addr(stcb->asoc.alternate);
 547                         stcb->asoc.alternate = NULL;
 548                 }
 549                 if (response_required) {
 550                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 551                 }
 552                 /*
 553                  * Mobility adaptation. Ideally, when the reception of SET
 554                  * PRIMARY with DELETE IP ADDRESS of the previous primary
 555                  * destination, unacknowledged DATA are retransmitted
 556                  * immediately to the new primary destination for seamless
 557                  * handover. If the destination is UNCONFIRMED and marked to
 558                  * REQ_PRIM, The retransmission occur when reception of the
 559                  * HEARTBEAT-ACK.  (See sctp_handle_heartbeat_ack in
 560                  * sctp_input.c) Also, when change of the primary
 561                  * destination, it is better that all subsequent new DATA
 562                  * containing already queued DATA are transmitted to the new
 563                  * primary destination. (by micchie)
 564                  */
 565                 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
 566                     SCTP_MOBILITY_BASE) ||
 567                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 568                     SCTP_MOBILITY_FASTHANDOFF)) &&
 569                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 570                     SCTP_MOBILITY_PRIM_DELETED) &&
 571                     (stcb->asoc.primary_destination->dest_state &
 572                     SCTP_ADDR_UNCONFIRMED) == 0) {
 573                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
 574                             stcb->sctp_ep, stcb, NULL,
 575                             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1);
 576                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 577                             SCTP_MOBILITY_FASTHANDOFF)) {
 578                                 sctp_assoc_immediate_retrans(stcb,
 579                                     stcb->asoc.primary_destination);
 580                         }
 581                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 582                             SCTP_MOBILITY_BASE)) {
 583                                 sctp_move_chunks_from_net(stcb,
 584                                     stcb->asoc.deleted_primary);
 585                         }
 586                         sctp_delete_prim_timer(stcb->sctp_ep, stcb);
 587                 }
 588         } else {
 589                 /* couldn't set the requested primary address! */
 590                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 591                     "process_asconf_set_primary: set primary failed!\n");
 592                 /* must have been an invalid address, so report */
 593                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 594                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 595                     aparam_length);
 596         }
 597
 598         return (m_reply);
 599 }
 600
 601 /*
 602  * handles an ASCONF chunk.
 603  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 604  */
 605 void
 606 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 607     struct sockaddr *src,
 608     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 609     int first)
 610 {
 611         struct sctp_association *asoc;
 612         uint32_t serial_num;
 613         struct mbuf *n, *m_ack, *m_result, *m_tail;
 614         struct sctp_asconf_ack_chunk *ack_cp;
 615         struct sctp_asconf_paramhdr *aph;
 616         struct sctp_ipv6addr_param *p_addr;
 617         unsigned int asconf_limit, cnt;
 618         int error = 0;          /* did an error occur? */
 619
 620         /* asconf param buffer */
 621         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 622         struct sctp_asconf_ack *ack, *ack_next;
 623
 624         /* verify minimum length */
 625         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 626                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 627                     "handle_asconf: chunk too small = %xh\n",
 628                     ntohs(cp->ch.chunk_length));
 629                 return;
 630         }
 631         asoc = &stcb->asoc;
 632         serial_num = ntohl(cp->serial_number);
 633
 634         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 635                 /* got a duplicate ASCONF */
 636                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 637                     "handle_asconf: got duplicate serial number = %xh\n",
 638                     serial_num);
 639                 return;
 640         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 641                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 642                     serial_num, asoc->asconf_seq_in + 1);
 643                 return;
 644         }
 645
 646         /* it's the expected "next" sequence number, so process it */
 647         asoc->asconf_seq_in = serial_num;       /* update sequence */
 648         /* get length of all the param's in the ASCONF */
 649         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 650         SCTPDBG(SCTP_DEBUG_ASCONF1,
 651             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 652             asconf_limit, serial_num);
 653
 654         if (first) {
 655                 /* delete old cache */
 656                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 657
 658                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 659                         if (ack->serial_number == serial_num)
 660                                 break;
 661                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 662                             ack->serial_number, serial_num);
 663                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 664                         if (ack->data != NULL) {
 665                                 sctp_m_freem(ack->data);
 666                         }
 667                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 668                 }
 669         }
 670
 671         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 672             M_NOWAIT, 1, MT_DATA);
 673         if (m_ack == NULL) {
 674                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 675                     "handle_asconf: couldn't get mbuf!\n");
 676                 return;
 677         }
 678         m_tail = m_ack;         /* current reply chain's tail */
 679
 680         /* fill in ASCONF-ACK header */
 681         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 682         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 683         ack_cp->ch.chunk_flags = 0;
 684         ack_cp->serial_number = htonl(serial_num);
 685         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 686         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 687         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 688
 689         /* skip the lookup address parameter */
 690         offset += sizeof(struct sctp_asconf_chunk);
 691         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf);
 692         if (p_addr == NULL) {
 693                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 694                     "handle_asconf: couldn't get lookup addr!\n");
 695                 /* respond with a missing/invalid mandatory parameter error */
 696                 sctp_m_freem(m_ack);
 697                 return;
 698         }
 699         /* skip lookup addr */
 700         offset += SCTP_SIZE32(ntohs(p_addr->ph.param_length));
 701         /* get pointer to first asconf param in ASCONF */
 702         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf);
 703         if (aph == NULL) {
 704                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 705                 goto send_reply;
 706         }
 707         /* process through all parameters */
 708         cnt = 0;
 709         while (aph != NULL) {
 710                 unsigned int param_length, param_type;
 711
 712                 param_type = ntohs(aph->ph.param_type);
 713                 param_length = ntohs(aph->ph.param_length);
 714                 if (offset + param_length > asconf_limit) {
 715                         /* parameter goes beyond end of chunk! */
 716                         sctp_m_freem(m_ack);
 717                         return;
 718                 }
 719                 m_result = NULL;
 720
 721                 if (param_length > sizeof(aparam_buf)) {
 722                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 723                         sctp_m_freem(m_ack);
 724                         return;
 725                 }
 726                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 727                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 728                         sctp_m_freem(m_ack);
 729                         return;
 730                 }
 731                 /* get the entire parameter */
 732                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 733                 if (aph == NULL) {
 734                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 735                         sctp_m_freem(m_ack);
 736                         return;
 737                 }
 738                 switch (param_type) {
 739                 case SCTP_ADD_IP_ADDRESS:
 740                         m_result = sctp_process_asconf_add_ip(src, aph, stcb,
 741                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 742                         cnt++;
 743                         break;
 744                 case SCTP_DEL_IP_ADDRESS:
 745                         m_result = sctp_process_asconf_delete_ip(src, aph, stcb,
 746                             error);
 747                         break;
 748                 case SCTP_ERROR_CAUSE_IND:
 749                         /* not valid in an ASCONF chunk */
 750                         break;
 751                 case SCTP_SET_PRIM_ADDR:
 752                         m_result = sctp_process_asconf_set_primary(src, aph,
 753                             stcb, error);
 754                         break;
 755                 case SCTP_NAT_VTAGS:
 756                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 757                         break;
 758                 case SCTP_SUCCESS_REPORT:
 759                         /* not valid in an ASCONF chunk */
 760                         break;
 761                 case SCTP_ULP_ADAPTATION:
 762                         /* FIX */
 763                         break;
 764                 default:
 765                         if ((param_type & 0x8000) == 0) {
 766                                 /* Been told to STOP at this param */
 767                                 asconf_limit = offset;
 768                                 /*
 769                                  * FIX FIX - We need to call
 770                                  * sctp_arethere_unrecognized_parameters()
 771                                  * to get a operr and send it for any
 772                                  * param's with the 0x4000 bit set OR do it
 773                                  * here ourselves... note we still must STOP
 774                                  * if the 0x8000 bit is clear.
 775                                  */
 776                         }
 777                         /* unknown/invalid param type */
 778                         break;
 779                 }               /* switch */
 780
 781                 /* add any (error) result to the reply mbuf chain */
 782                 if (m_result != NULL) {
 783                         SCTP_BUF_NEXT(m_tail) = m_result;
 784                         m_tail = m_result;
 785                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 786                         /* set flag to force success reports */
 787                         error = 1;
 788                 }
 789                 offset += SCTP_SIZE32(param_length);
 790                 /* update remaining ASCONF message length to process */
 791                 if (offset >= asconf_limit) {
 792                         /* no more data in the mbuf chain */
 793                         break;
 794                 }
 795                 /* get pointer to next asconf param */
 796                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 797                     sizeof(struct sctp_asconf_paramhdr),
 798                     (uint8_t *)&aparam_buf);
 799                 if (aph == NULL) {
 800                         /* can't get an asconf paramhdr */
 801                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 802                         /* FIX ME - add error here... */
 803                 }
 804         }
 805
 806 send_reply:
 807         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 808         /* save the ASCONF-ACK reply */
 809         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 810             struct sctp_asconf_ack);
 811         if (ack == NULL) {
 812                 sctp_m_freem(m_ack);
 813                 return;
 814         }
 815         ack->serial_number = serial_num;
 816         ack->last_sent_to = NULL;
 817         ack->data = m_ack;
 818         ack->len = 0;
 819         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 820                 ack->len += SCTP_BUF_LEN(n);
 821         }
 822         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 823
 824         /* see if last_control_chunk_from is set properly (use IP src addr) */
 825         if (stcb->asoc.last_control_chunk_from == NULL) {
 826                 /*
 827                  * this could happen if the source address was just newly
 828                  * added
 829                  */
 830                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 831                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 832                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 833                 /* look up the from address */
 834                 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src);
 835 #ifdef SCTP_DEBUG
 836                 if (stcb->asoc.last_control_chunk_from == NULL) {
 837                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 838                 }
 839 #endif
 840         }
 841 }
 842
 843 /*
 844  * does the address match? returns 0 if not, 1 if so
 845  */
 846 static uint32_t
 847 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 848 {
 849         switch (sa->sa_family) {
 850 #ifdef INET6
 851         case AF_INET6:
 852                 {
 853                         /* XXX scopeid */
 854                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 855
 856                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 857                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 858                             sizeof(struct in6_addr)) == 0)) {
 859                                 return (1);
 860                         }
 861                         break;
 862                 }
 863 #endif
 864 #ifdef INET
 865         case AF_INET:
 866                 {
 867                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 868
 869                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 870                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 871                             sizeof(struct in_addr)) == 0)) {
 872                                 return (1);
 873                         }
 874                         break;
 875                 }
 876 #endif
 877         default:
 878                 break;
 879         }
 880         return (0);
 881 }
 882
 883 /*
 884  * does the address match? returns 0 if not, 1 if so
 885  */
 886 static uint32_t
 887 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 888 {
 889 #if defined(INET) || defined(INET6)
 890         uint16_t param_type, param_length;
 891
 892         param_type = ntohs(ph->param_type);
 893         param_length = ntohs(ph->param_length);
 894 #endif
 895         switch (sa->sa_family) {
 896 #ifdef INET6
 897         case AF_INET6:
 898                 {
 899                         /* XXX scopeid */
 900                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 901                         struct sctp_ipv6addr_param *v6addr;
 902
 903                         v6addr = (struct sctp_ipv6addr_param *)ph;
 904                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 905                             (param_length == sizeof(struct sctp_ipv6addr_param)) &&
 906                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 907                             sizeof(struct in6_addr)) == 0)) {
 908                                 return (1);
 909                         }
 910                         break;
 911                 }
 912 #endif
 913 #ifdef INET
 914         case AF_INET:
 915                 {
 916                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 917                         struct sctp_ipv4addr_param *v4addr;
 918
 919                         v4addr = (struct sctp_ipv4addr_param *)ph;
 920                         if ((param_type == SCTP_IPV4_ADDRESS) &&
 921                             (param_length == sizeof(struct sctp_ipv4addr_param)) &&
 922                             (memcmp(&v4addr->addr, &sin->sin_addr,
 923                             sizeof(struct in_addr)) == 0)) {
 924                                 return (1);
 925                         }
 926                         break;
 927                 }
 928 #endif
 929         default:
 930                 break;
 931         }
 932         return (0);
 933 }
 934
 935 /*
 936  * Cleanup for non-responded/OP ERR'd ASCONF
 937  */
 938 void
 939 sctp_asconf_cleanup(struct sctp_tcb *stcb)
 940 {
 941         /*
 942          * clear out any existing asconfs going out
 943          */
 944         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL,
 945             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
 946         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
 947         /* remove the old ASCONF on our outbound queue */
 948         sctp_toss_old_asconf(stcb);
 949 }
 950
 951 /*
 952  * cleanup any cached source addresses that may be topologically
 953  * incorrect after a new address has been added to this interface.
 954  */
 955 static void
 956 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
 957 {
 958         struct sctp_nets *net;
 959
 960         /*
 961          * Ideally, we want to only clear cached routes and source addresses
 962          * that are topologically incorrect.  But since there is no easy way
 963          * to know whether the newly added address on the ifn would cause a
 964          * routing change (i.e. a new egress interface would be chosen)
 965          * without doing a new routing lookup and source address selection,
 966          * we will (for now) just flush any cached route using a different
 967          * ifn (and cached source addrs) and let output re-choose them
 968          * during the next send on that net.
 969          */
 970         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 971                 /*
 972                  * clear any cached route (and cached source address) if the
 973                  * route's interface is NOT the same as the address change.
 974                  * If it's the same interface, just clear the cached source
 975                  * address.
 976                  */
 977                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
 978                     ((ifn == NULL) ||
 979                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
 980                         /* clear any cached route */
 981                         RO_NHFREE(&net->ro);
 982                 }
 983                 /* clear any cached source address */
 984                 if (net->src_addr_selected) {
 985                         sctp_free_ifa(net->ro._s_addr);
 986                         net->ro._s_addr = NULL;
 987                         net->src_addr_selected = 0;
 988                 }
 989         }
 990 }
 991
 992 void
 993 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
 994 {
 995         int error;
 996
 997         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
 998                 return;
 999         }
1000         if (stcb->asoc.deleted_primary == NULL) {
1001                 return;
1002         }
1003
1004         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
1005                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
1006                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1007                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
1008                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
1009                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
1010                     stcb->asoc.deleted_primary,
1011                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
1012                 stcb->asoc.num_send_timers_up--;
1013                 if (stcb->asoc.num_send_timers_up < 0) {
1014                         stcb->asoc.num_send_timers_up = 0;
1015                 }
1016                 SCTP_TCB_LOCK_ASSERT(stcb);
1017                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1018                     stcb->asoc.deleted_primary);
1019                 if (error) {
1020                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1021                         return;
1022                 }
1023                 SCTP_TCB_LOCK_ASSERT(stcb);
1024 #ifdef SCTP_AUDITING_ENABLED
1025                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1026 #endif
1027                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1028                 if ((stcb->asoc.num_send_timers_up == 0) &&
1029                     (stcb->asoc.sent_queue_cnt > 0)) {
1030                         struct sctp_tmit_chunk *chk;
1031
1032                         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1033                                 if (chk->whoTo != NULL) {
1034                                         break;
1035                                 }
1036                         }
1037                         if (chk != NULL) {
1038                                 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
1039                         }
1040                 }
1041         }
1042         return;
1043 }
1044
1045 static int
1046     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1047
1048 void
1049 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1050 {
1051         struct sctp_tmit_chunk *chk;
1052
1053         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1054         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1055             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4);
1056         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1057         net->error_count = 0;
1058         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1059                 if (chk->whoTo == net) {
1060                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1061                                 chk->sent = SCTP_DATAGRAM_RESEND;
1062                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1063                                 sctp_flight_size_decrease(chk);
1064                                 sctp_total_flight_decrease(stcb, chk);
1065                                 net->marked_retrans++;
1066                                 stcb->asoc.marked_retrans++;
1067                         }
1068                 }
1069         }
1070         if (net->marked_retrans) {
1071                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1072         }
1073 }
1074
1075 static void
1076 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1077 {
1078         struct sctp_nets *net;
1079         int addrnum, changed;
1080
1081         /*
1082          * If number of local valid addresses is 1, the valid address is
1083          * probably newly added address. Several valid addresses in this
1084          * association.  A source address may not be changed.  Additionally,
1085          * they can be configured on a same interface as "alias" addresses.
1086          * (by micchie)
1087          */
1088         addrnum = sctp_local_addr_count(stcb);
1089         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1090             addrnum);
1091         if (addrnum == 1) {
1092                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1093                         /* clear any cached route and source address */
1094                         RO_NHFREE(&net->ro);
1095                         if (net->src_addr_selected) {
1096                                 sctp_free_ifa(net->ro._s_addr);
1097                                 net->ro._s_addr = NULL;
1098                                 net->src_addr_selected = 0;
1099                         }
1100                         /* Retransmit unacknowledged DATA chunks immediately */
1101                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1102                             SCTP_MOBILITY_FASTHANDOFF)) {
1103                                 sctp_net_immediate_retrans(stcb, net);
1104                         }
1105                         /* also, SET PRIMARY is maybe already sent */
1106                 }
1107                 return;
1108         }
1109
1110         /* Multiple local addresses exsist in the association.  */
1111         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1112                 /* clear any cached route and source address */
1113                 RO_NHFREE(&net->ro);
1114                 if (net->src_addr_selected) {
1115                         sctp_free_ifa(net->ro._s_addr);
1116                         net->ro._s_addr = NULL;
1117                         net->src_addr_selected = 0;
1118                 }
1119                 /*
1120                  * Check if the nexthop is corresponding to the new address.
1121                  * If the new address is corresponding to the current
1122                  * nexthop, the path will be changed. If the new address is
1123                  * NOT corresponding to the current nexthop, the path will
1124                  * not be changed.
1125                  */
1126                 SCTP_RTALLOC((sctp_route_t *)&net->ro,
1127                     stcb->sctp_ep->def_vrf_id,
1128                     stcb->sctp_ep->fibnum);
1129                 if (net->ro.ro_nh == NULL)
1130                         continue;
1131
1132                 changed = 0;
1133                 switch (net->ro._l_addr.sa.sa_family) {
1134 #ifdef INET
1135                 case AF_INET:
1136                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) {
1137                                 changed = 1;
1138                         }
1139                         break;
1140 #endif
1141 #ifdef INET6
1142                 case AF_INET6:
1143                         if (sctp_v6src_match_nexthop(
1144                             &newifa->address.sin6, (sctp_route_t *)&net->ro)) {
1145                                 changed = 1;
1146                         }
1147                         break;
1148 #endif
1149                 default:
1150                         break;
1151                 }
1152                 /*
1153                  * if the newly added address does not relate routing
1154                  * information, we skip.
1155                  */
1156                 if (changed == 0)
1157                         continue;
1158                 /* Retransmit unacknowledged DATA chunks immediately */
1159                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1160                     SCTP_MOBILITY_FASTHANDOFF)) {
1161                         sctp_net_immediate_retrans(stcb, net);
1162                 }
1163                 /* Send SET PRIMARY for this new address */
1164                 if (net == stcb->asoc.primary_destination) {
1165                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1166                             SCTP_SET_PRIM_ADDR);
1167                 }
1168         }
1169 }
1170
1171 /*
1172  * process an ADD/DELETE IP ack from peer.
1173  * addr: corresponding sctp_ifa to the address being added/deleted.
1174  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1175  * flag: 1=success, 0=failure.
1176  */
1177 static void
1178 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1179 {
1180         /*
1181          * do the necessary asoc list work- if we get a failure indication,
1182          * leave the address on the assoc's restricted list.  If we get a
1183          * success indication, remove the address from the restricted list.
1184          */
1185         /*
1186          * Note: this will only occur for ADD_IP_ADDRESS, since
1187          * DEL_IP_ADDRESS is never actually added to the list...
1188          */
1189         if (flag) {
1190                 /* success case, so remove from the restricted list */
1191                 sctp_del_local_addr_restricted(stcb, addr);
1192
1193                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1194                     SCTP_MOBILITY_BASE) ||
1195                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1196                     SCTP_MOBILITY_FASTHANDOFF)) {
1197                         sctp_path_check_and_react(stcb, addr);
1198                         return;
1199                 }
1200                 /* clear any cached/topologically incorrect source addresses */
1201                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1202         }
1203         /* else, leave it on the list */
1204 }
1205
1206 /*
1207  * add an asconf add/delete/set primary IP address parameter to the queue.
1208  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1209  * returns 0 if queued, -1 if not queued/removed.
1210  * NOTE: if adding, but a delete for the same address is already scheduled
1211  * (and not yet sent out), simply remove it from queue.  Same for deleting
1212  * an address already scheduled for add.  If a duplicate operation is found,
1213  * ignore the new one.
1214  */
1215 static int
1216 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1217     uint16_t type)
1218 {
1219         struct sctp_asconf_addr *aa, *aa_next;
1220
1221         /* make sure the request isn't already in the queue */
1222         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1223                 /* address match? */
1224                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1225                         continue;
1226                 /*
1227                  * is the request already in queue but not sent? pass the
1228                  * request already sent in order to resolve the following
1229                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1230                  * can't remove the ADD request already sent 3. arrival of
1231                  * ADD
1232                  */
1233                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1234                         return (-1);
1235                 }
1236                 /* is the negative request already in queue, and not sent */
1237                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1238                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1239                         /* add requested, delete already queued */
1240                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1241                         /* remove the ifa from the restricted list */
1242                         sctp_del_local_addr_restricted(stcb, ifa);
1243                         /* free the asconf param */
1244                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1245                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1246                         return (-1);
1247                 }
1248                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1249                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1250                         /* delete requested, add already queued */
1251                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1252                         /* remove the aa->ifa from the restricted list */
1253                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1254                         /* free the asconf param */
1255                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1256                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1257                         return (-1);
1258                 }
1259         }                       /* for each aa */
1260
1261         /* adding new request to the queue */
1262         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1263             SCTP_M_ASC_ADDR);
1264         if (aa == NULL) {
1265                 /* didn't get memory */
1266                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1267                 return (-1);
1268         }
1269         aa->special_del = 0;
1270         /* fill in asconf address parameter fields */
1271         /* top level elements are "networked" during send */
1272         aa->ap.aph.ph.param_type = type;
1273         aa->ifa = ifa;
1274         atomic_add_int(&ifa->refcount, 1);
1275         /* correlation_id filled in during send routine later... */
1276         switch (ifa->address.sa.sa_family) {
1277 #ifdef INET6
1278         case AF_INET6:
1279                 {
1280                         struct sockaddr_in6 *sin6;
1281
1282                         sin6 = &ifa->address.sin6;
1283                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1284                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1285                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1286                             sizeof(struct sctp_ipv6addr_param);
1287                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1288                             sizeof(struct in6_addr));
1289                         break;
1290                 }
1291 #endif
1292 #ifdef INET
1293         case AF_INET:
1294                 {
1295                         struct sockaddr_in *sin;
1296
1297                         sin = &ifa->address.sin;
1298                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1299                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1300                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1301                             sizeof(struct sctp_ipv4addr_param);
1302                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1303                             sizeof(struct in_addr));
1304                         break;
1305                 }
1306 #endif
1307         default:
1308                 /* invalid family! */
1309                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1310                 sctp_free_ifa(ifa);
1311                 return (-1);
1312         }
1313         aa->sent = 0;           /* clear sent flag */
1314
1315         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1316 #ifdef SCTP_DEBUG
1317         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1318                 if (type == SCTP_ADD_IP_ADDRESS) {
1319                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1320                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1321                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1322                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1323                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1324                 } else {
1325                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1326                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1327                 }
1328         }
1329 #endif
1330
1331         return (0);
1332 }
1333
1334 /*
1335  * add an asconf operation for the given ifa and type.
1336  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1337  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1338  * advisable.
1339  */
1340 static int
1341 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1342     uint16_t type)
1343 {
1344         uint32_t status;
1345         int pending_delete_queued = 0;
1346         int last;
1347
1348         /* see if peer supports ASCONF */
1349         if (stcb->asoc.asconf_supported == 0) {
1350                 return (-1);
1351         }
1352
1353         /*
1354          * if this is deleting the last address from the assoc, mark it as
1355          * pending.
1356          */
1357         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) {
1358                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1359                         last = (sctp_local_addr_count(stcb) == 0);
1360                 } else {
1361                         last = (sctp_local_addr_count(stcb) == 1);
1362                 }
1363                 if (last) {
1364                         /* set the pending delete info only */
1365                         stcb->asoc.asconf_del_pending = 1;
1366                         stcb->asoc.asconf_addr_del_pending = ifa;
1367                         atomic_add_int(&ifa->refcount, 1);
1368                         SCTPDBG(SCTP_DEBUG_ASCONF2,
1369                             "asconf_queue_add: mark delete last address pending\n");
1370                         return (-1);
1371                 }
1372         }
1373
1374         /* queue an asconf parameter */
1375         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1376
1377         /*
1378          * if this is an add, and there is a delete also pending (i.e. the
1379          * last local address is being changed), queue the pending delete
1380          * too.
1381          */
1382         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1383                 /* queue in the pending delete */
1384                 if (sctp_asconf_queue_mgmt(stcb,
1385                     stcb->asoc.asconf_addr_del_pending,
1386                     SCTP_DEL_IP_ADDRESS) == 0) {
1387                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n");
1388                         pending_delete_queued = 1;
1389                         /* clear out the pending delete info */
1390                         stcb->asoc.asconf_del_pending = 0;
1391                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1392                         stcb->asoc.asconf_addr_del_pending = NULL;
1393                 }
1394         }
1395
1396         if (pending_delete_queued) {
1397                 struct sctp_nets *net;
1398
1399                 /*
1400                  * since we know that the only/last address is now being
1401                  * changed in this case, reset the cwnd/rto on all nets to
1402                  * start as a new address and path.  Also clear the error
1403                  * counts to give the assoc the best chance to complete the
1404                  * address change.
1405                  */
1406                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1407                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1408                             net);
1409                         net->RTO = 0;
1410                         net->error_count = 0;
1411                 }
1412                 stcb->asoc.overall_error_count = 0;
1413                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1414                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1415                             stcb->asoc.overall_error_count,
1416                             0,
1417                             SCTP_FROM_SCTP_ASCONF,
1418                             __LINE__);
1419                 }
1420
1421                 /* queue in an advisory set primary too */
1422                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1423                 /* let caller know we should send this out immediately */
1424                 status = 1;
1425         }
1426         return (status);
1427 }
1428
1429 /*-
1430  * add an asconf delete IP address parameter to the queue by sockaddr and
1431  * possibly with no sctp_ifa available.  This is only called by the routine
1432  * that checks the addresses in an INIT-ACK against the current address list.
1433  * returns 0 if completed, non-zero if not completed.
1434  * NOTE: if an add is already scheduled (and not yet sent out), simply
1435  * remove it from queue.  If a duplicate operation is found, ignore the
1436  * new one.
1437  */
1438 static int
1439 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1440 {
1441         struct sctp_ifa *ifa;
1442         struct sctp_asconf_addr *aa, *aa_next;
1443
1444         if (stcb == NULL) {
1445                 return (-1);
1446         }
1447         /* see if peer supports ASCONF */
1448         if (stcb->asoc.asconf_supported == 0) {
1449                 return (-1);
1450         }
1451         /* make sure the request isn't already in the queue */
1452         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1453                 /* address match? */
1454                 if (sctp_asconf_addr_match(aa, sa) == 0)
1455                         continue;
1456                 /* is the request already in queue (sent or not) */
1457                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1458                         return (-1);
1459                 }
1460                 /* is the negative request already in queue, and not sent */
1461                 if (aa->sent == 1)
1462                         continue;
1463                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1464                         /* add already queued, so remove existing entry */
1465                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1466                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1467                         /* free the entry */
1468                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1469                         return (-1);
1470                 }
1471         }                       /* for each aa */
1472
1473         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1474         ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED);
1475
1476         /* adding new request to the queue */
1477         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1478             SCTP_M_ASC_ADDR);
1479         if (aa == NULL) {
1480                 /* didn't get memory */
1481                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1482                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1483                 return (-1);
1484         }
1485         aa->special_del = 0;
1486         /* fill in asconf address parameter fields */
1487         /* top level elements are "networked" during send */
1488         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1489         aa->ifa = ifa;
1490         if (ifa)
1491                 atomic_add_int(&ifa->refcount, 1);
1492         /* correlation_id filled in during send routine later... */
1493         switch (sa->sa_family) {
1494 #ifdef INET6
1495         case AF_INET6:
1496                 {
1497                         /* IPv6 address */
1498                         struct sockaddr_in6 *sin6;
1499
1500                         sin6 = (struct sockaddr_in6 *)sa;
1501                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1502                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1503                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1504                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1505                             sizeof(struct in6_addr));
1506                         break;
1507                 }
1508 #endif
1509 #ifdef INET
1510         case AF_INET:
1511                 {
1512                         /* IPv4 address */
1513                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1514
1515                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1516                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1517                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1518                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1519                             sizeof(struct in_addr));
1520                         break;
1521                 }
1522 #endif
1523         default:
1524                 /* invalid family! */
1525                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1526                 if (ifa)
1527                         sctp_free_ifa(ifa);
1528                 return (-1);
1529         }
1530         aa->sent = 0;           /* clear sent flag */
1531
1532         /* delete goes to the back of the queue */
1533         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1534
1535         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1536         return (0);
1537 }
1538
1539 /*
1540  * find a specific asconf param on our "sent" queue
1541  */
1542 static struct sctp_asconf_addr *
1543 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1544 {
1545         struct sctp_asconf_addr *aa;
1546
1547         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1548                 if (aa->ap.aph.correlation_id == correlation_id &&
1549                     aa->sent == 1) {
1550                         /* found it */
1551                         return (aa);
1552                 }
1553         }
1554         /* didn't find it */
1555         return (NULL);
1556 }
1557
1558 /*
1559  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1560  * notifications based on the error response
1561  */
1562 static void
1563 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED,
1564     struct sctp_asconf_paramhdr *aph)
1565 {
1566         struct sctp_error_cause *eh;
1567         struct sctp_paramhdr *ph;
1568         uint16_t param_type;
1569         uint16_t error_code;
1570
1571         eh = (struct sctp_error_cause *)(aph + 1);
1572         ph = (struct sctp_paramhdr *)(eh + 1);
1573         /* validate lengths */
1574         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1575             htons(aph->ph.param_length)) {
1576                 /* invalid error cause length */
1577                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1578                     "asconf_process_error: cause element too long\n");
1579                 return;
1580         }
1581         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1582             htons(eh->length)) {
1583                 /* invalid included TLV length */
1584                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1585                     "asconf_process_error: included TLV too long\n");
1586                 return;
1587         }
1588         /* which error code ? */
1589         error_code = ntohs(eh->code);
1590         param_type = ntohs(aph->ph.param_type);
1591         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1592         switch (error_code) {
1593         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1594                 /* we allow ourselves to "try again" for this error */
1595                 break;
1596         default:
1597                 /* peer can't handle it... */
1598                 switch (param_type) {
1599                 case SCTP_ADD_IP_ADDRESS:
1600                 case SCTP_DEL_IP_ADDRESS:
1601                 case SCTP_SET_PRIM_ADDR:
1602                         break;
1603                 default:
1604                         break;
1605                 }
1606         }
1607 }
1608
1609 /*
1610  * process an asconf queue param.
1611  * aparam: parameter to process, will be removed from the queue.
1612  * flag: 1=success case, 0=failure case
1613  */
1614 static void
1615 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1616     struct sctp_asconf_addr *aparam, uint32_t flag)
1617 {
1618         uint16_t param_type;
1619
1620         /* process this param */
1621         param_type = aparam->ap.aph.ph.param_type;
1622         switch (param_type) {
1623         case SCTP_ADD_IP_ADDRESS:
1624                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1625                     "process_param_ack: added IP address\n");
1626                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1627                 break;
1628         case SCTP_DEL_IP_ADDRESS:
1629                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1630                     "process_param_ack: deleted IP address\n");
1631                 /* nothing really to do... lists already updated */
1632                 break;
1633         case SCTP_SET_PRIM_ADDR:
1634                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1635                     "process_param_ack: set primary IP address\n");
1636                 /* nothing to do... peer may start using this addr */
1637                 break;
1638         default:
1639                 /* should NEVER happen */
1640                 break;
1641         }
1642
1643         /* remove the param and free it */
1644         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1645         if (aparam->ifa)
1646                 sctp_free_ifa(aparam->ifa);
1647         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1648 }
1649
1650 /*
1651  * cleanup from a bad asconf ack parameter
1652  */
1653 static void
1654 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED)
1655 {
1656         /* assume peer doesn't really know how to do asconfs */
1657         /* XXX we could free the pending queue here */
1658
1659 }
1660
1661 void
1662 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1663     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1664     struct sctp_nets *net, int *abort_no_unlock)
1665 {
1666         struct sctp_association *asoc;
1667         uint32_t serial_num;
1668         uint16_t ack_length;
1669         struct sctp_asconf_paramhdr *aph;
1670         struct sctp_asconf_addr *aa, *aa_next;
1671         uint32_t last_error_id = 0;     /* last error correlation id */
1672         uint32_t id;
1673         struct sctp_asconf_addr *ap;
1674
1675         /* asconf param buffer */
1676         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1677
1678         /* verify minimum length */
1679         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1680                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1681                     "handle_asconf_ack: chunk too small = %xh\n",
1682                     ntohs(cp->ch.chunk_length));
1683                 return;
1684         }
1685         asoc = &stcb->asoc;
1686         serial_num = ntohl(cp->serial_number);
1687
1688         /*
1689          * NOTE: we may want to handle this differently- currently, we will
1690          * abort when we get an ack for the expected serial number + 1 (eg.
1691          * we didn't send it), process an ack normally if it is the expected
1692          * serial number, and re-send the previous ack for *ALL* other
1693          * serial numbers
1694          */
1695
1696         /*
1697          * if the serial number is the next expected, but I didn't send it,
1698          * abort the asoc, since someone probably just hijacked us...
1699          */
1700         if (serial_num == (asoc->asconf_seq_out + 1)) {
1701                 struct mbuf *op_err;
1702                 char msg[SCTP_DIAG_INFO_LEN];
1703
1704                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1705                 SCTP_SNPRINTF(msg, sizeof(msg), "Never sent serial number %8.8x", serial_num);
1706                 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
1707                 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
1708                 *abort_no_unlock = 1;
1709                 return;
1710         }
1711         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1712                 /* got a duplicate/unexpected ASCONF-ACK */
1713                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1714                     serial_num, asoc->asconf_seq_out_acked + 1);
1715                 return;
1716         }
1717
1718         if (serial_num == asoc->asconf_seq_out - 1) {
1719                 /* stop our timer */
1720                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL,
1721                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5);
1722         }
1723
1724         /* process the ASCONF-ACK contents */
1725         ack_length = ntohs(cp->ch.chunk_length) -
1726             sizeof(struct sctp_asconf_ack_chunk);
1727         offset += sizeof(struct sctp_asconf_ack_chunk);
1728         /* process through all parameters */
1729         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1730                 unsigned int param_length, param_type;
1731
1732                 /* get pointer to next asconf parameter */
1733                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1734                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1735                 if (aph == NULL) {
1736                         /* can't get an asconf paramhdr */
1737                         sctp_asconf_ack_clear(stcb);
1738                         return;
1739                 }
1740                 param_type = ntohs(aph->ph.param_type);
1741                 param_length = ntohs(aph->ph.param_length);
1742                 if (param_length > ack_length) {
1743                         sctp_asconf_ack_clear(stcb);
1744                         return;
1745                 }
1746                 if (param_length < sizeof(struct sctp_paramhdr)) {
1747                         sctp_asconf_ack_clear(stcb);
1748                         return;
1749                 }
1750                 /* get the complete parameter... */
1751                 if (param_length > sizeof(aparam_buf)) {
1752                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1753                             "param length (%u) larger than buffer size!\n", param_length);
1754                         sctp_asconf_ack_clear(stcb);
1755                         return;
1756                 }
1757                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1758                 if (aph == NULL) {
1759                         sctp_asconf_ack_clear(stcb);
1760                         return;
1761                 }
1762                 /* correlation_id is transparent to peer, no ntohl needed */
1763                 id = aph->correlation_id;
1764
1765                 switch (param_type) {
1766                 case SCTP_ERROR_CAUSE_IND:
1767                         last_error_id = id;
1768                         /* find the corresponding asconf param in our queue */
1769                         ap = sctp_asconf_find_param(stcb, id);
1770                         if (ap == NULL) {
1771                                 /* hmm... can't find this in our queue! */
1772                                 break;
1773                         }
1774                         /* process the parameter, failed flag */
1775                         sctp_asconf_process_param_ack(stcb, ap, 0);
1776                         /* process the error response */
1777                         sctp_asconf_process_error(stcb, aph);
1778                         break;
1779                 case SCTP_SUCCESS_REPORT:
1780                         /* find the corresponding asconf param in our queue */
1781                         ap = sctp_asconf_find_param(stcb, id);
1782                         if (ap == NULL) {
1783                                 /* hmm... can't find this in our queue! */
1784                                 break;
1785                         }
1786                         /* process the parameter, success flag */
1787                         sctp_asconf_process_param_ack(stcb, ap, 1);
1788                         break;
1789                 default:
1790                         break;
1791                 }               /* switch */
1792
1793                 /* update remaining ASCONF-ACK message length to process */
1794                 if (ack_length > SCTP_SIZE32(param_length)) {
1795                         ack_length -= SCTP_SIZE32(param_length);
1796                 } else {
1797                         break;
1798                 }
1799                 offset += SCTP_SIZE32(param_length);
1800         }                       /* while */
1801
1802         /*
1803          * if there are any "sent" params still on the queue, these are
1804          * implicitly "success", or "failed" (if we got an error back) ...
1805          * so process these appropriately
1806          *
1807          * we assume that the correlation_id's are monotonically increasing
1808          * beginning from 1 and that we don't have *that* many outstanding
1809          * at any given time
1810          */
1811         if (last_error_id == 0)
1812                 last_error_id--;        /* set to "max" value */
1813         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1814                 if (aa->sent == 1) {
1815                         /*
1816                          * implicitly successful or failed if correlation_id
1817                          * < last_error_id, then success else, failure
1818                          */
1819                         if (aa->ap.aph.correlation_id < last_error_id)
1820                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1821                         else
1822                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1823                 } else {
1824                         /*
1825                          * since we always process in order (FIFO queue) if
1826                          * we reach one that hasn't been sent, the rest
1827                          * should not have been sent either. so, we're
1828                          * done...
1829                          */
1830                         break;
1831                 }
1832         }
1833
1834         /* update the next sequence number to use */
1835         asoc->asconf_seq_out_acked++;
1836         /* remove the old ASCONF on our outbound queue */
1837         sctp_toss_old_asconf(stcb);
1838         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1839 #ifdef SCTP_TIMER_BASED_ASCONF
1840                 /* we have more params, so restart our timer */
1841                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1842                     stcb, net);
1843 #else
1844                 /* we have more params, so send out more */
1845                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1846 #endif
1847         }
1848 }
1849
1850 #ifdef INET6
1851 static uint32_t
1852 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1853 {
1854         struct sockaddr_in6 *sin6, *net6;
1855         struct sctp_nets *net;
1856
1857         if (sa->sa_family != AF_INET6) {
1858                 /* wrong family */
1859                 return (0);
1860         }
1861         sin6 = (struct sockaddr_in6 *)sa;
1862         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1863                 /* not link local address */
1864                 return (0);
1865         }
1866         /* hunt through our destination nets list for this scope_id */
1867         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1868                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1869                     AF_INET6)
1870                         continue;
1871                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1872                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1873                         continue;
1874                 if (sctp_is_same_scope(sin6, net6)) {
1875                         /* found one */
1876                         return (1);
1877                 }
1878         }
1879         /* didn't find one */
1880         return (0);
1881 }
1882 #endif
1883
1884 /*
1885  * address management functions
1886  */
1887 static void
1888 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1889     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1890 {
1891         int status;
1892
1893         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1894             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1895                 /* subset bound, no ASCONF allowed case, so ignore */
1896                 return;
1897         }
1898         /*
1899          * note: we know this is not the subset bound, no ASCONF case eg.
1900          * this is boundall or subset bound w/ASCONF allowed
1901          */
1902
1903         /* first, make sure that the address is IPv4 or IPv6 and not jailed */
1904         switch (ifa->address.sa.sa_family) {
1905 #ifdef INET6
1906         case AF_INET6:
1907                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1908                     &ifa->address.sin6.sin6_addr) != 0) {
1909                         return;
1910                 }
1911                 break;
1912 #endif
1913 #ifdef INET
1914         case AF_INET:
1915                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1916                     &ifa->address.sin.sin_addr) != 0) {
1917                         return;
1918                 }
1919                 break;
1920 #endif
1921         default:
1922                 return;
1923         }
1924 #ifdef INET6
1925         /* make sure we're "allowed" to add this type of addr */
1926         if (ifa->address.sa.sa_family == AF_INET6) {
1927                 /* invalid if we're not a v6 endpoint */
1928                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1929                         return;
1930                 /* is the v6 addr really valid ? */
1931                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1932                         return;
1933                 }
1934         }
1935 #endif
1936         /* put this address on the "pending/do not use yet" list */
1937         sctp_add_local_addr_restricted(stcb, ifa);
1938         /*
1939          * check address scope if address is out of scope, don't queue
1940          * anything... note: this would leave the address on both inp and
1941          * asoc lists
1942          */
1943         switch (ifa->address.sa.sa_family) {
1944 #ifdef INET6
1945         case AF_INET6:
1946                 {
1947                         struct sockaddr_in6 *sin6;
1948
1949                         sin6 = &ifa->address.sin6;
1950                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1951                                 /* we skip unspecifed addresses */
1952                                 return;
1953                         }
1954                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1955                                 if (stcb->asoc.scope.local_scope == 0) {
1956                                         return;
1957                                 }
1958                                 /* is it the right link local scope? */
1959                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1960                                         return;
1961                                 }
1962                         }
1963                         if (stcb->asoc.scope.site_scope == 0 &&
1964                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1965                                 return;
1966                         }
1967                         break;
1968                 }
1969 #endif
1970 #ifdef INET
1971         case AF_INET:
1972                 {
1973                         struct sockaddr_in *sin;
1974
1975                         /* invalid if we are a v6 only endpoint */
1976                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1977                             SCTP_IPV6_V6ONLY(inp))
1978                                 return;
1979
1980                         sin = &ifa->address.sin;
1981                         if (sin->sin_addr.s_addr == 0) {
1982                                 /* we skip unspecifed addresses */
1983                                 return;
1984                         }
1985                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
1986                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1987                                 return;
1988                         }
1989                         break;
1990                 }
1991 #endif
1992         default:
1993                 /* else, not AF_INET or AF_INET6, so skip */
1994                 return;
1995         }
1996
1997         /* queue an asconf for this address add/delete */
1998         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1999                 /* does the peer do asconf? */
2000                 if (stcb->asoc.asconf_supported) {
2001                         /* queue an asconf for this addr */
2002                         status = sctp_asconf_queue_add(stcb, ifa, type);
2003
2004                         /*
2005                          * if queued ok, and in the open state, send out the
2006                          * ASCONF.  If in the non-open state, these will be
2007                          * sent when the state goes open.
2008                          */
2009                         if (status == 0 &&
2010                             ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2011                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) {
2012 #ifdef SCTP_TIMER_BASED_ASCONF
2013                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
2014                                     stcb, stcb->asoc.primary_destination);
2015 #else
2016                                 sctp_send_asconf(stcb, NULL, addr_locked);
2017 #endif
2018                         }
2019                 }
2020         }
2021 }
2022
2023 int
2024 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2025 {
2026         struct sctp_asconf_iterator *asc;
2027         struct sctp_ifa *ifa;
2028         struct sctp_laddr *l;
2029         int cnt_invalid = 0;
2030
2031         asc = (struct sctp_asconf_iterator *)ptr;
2032         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2033                 ifa = l->ifa;
2034                 switch (ifa->address.sa.sa_family) {
2035 #ifdef INET6
2036                 case AF_INET6:
2037                         /* invalid if we're not a v6 endpoint */
2038                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2039                                 cnt_invalid++;
2040                                 if (asc->cnt == cnt_invalid)
2041                                         return (1);
2042                         }
2043                         break;
2044 #endif
2045 #ifdef INET
2046                 case AF_INET:
2047                         {
2048                                 /* invalid if we are a v6 only endpoint */
2049                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2050                                     SCTP_IPV6_V6ONLY(inp)) {
2051                                         cnt_invalid++;
2052                                         if (asc->cnt == cnt_invalid)
2053                                                 return (1);
2054                                 }
2055                                 break;
2056                         }
2057 #endif
2058                 default:
2059                         /* invalid address family */
2060                         cnt_invalid++;
2061                         if (asc->cnt == cnt_invalid)
2062                                 return (1);
2063                 }
2064         }
2065         return (0);
2066 }
2067
2068 static int
2069 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2070 {
2071         struct sctp_ifa *ifa;
2072         struct sctp_asconf_iterator *asc;
2073         struct sctp_laddr *laddr, *nladdr, *l;
2074
2075         /* Only for specific case not bound all */
2076         asc = (struct sctp_asconf_iterator *)ptr;
2077         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2078                 ifa = l->ifa;
2079                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2080                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2081                             sctp_nxt_addr) {
2082                                 if (laddr->ifa == ifa) {
2083                                         laddr->action = 0;
2084                                         break;
2085                                 }
2086                         }
2087                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2088                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2089                                 /* remove only after all guys are done */
2090                                 if (laddr->ifa == ifa) {
2091                                         sctp_del_local_addr_ep(inp, ifa);
2092                                 }
2093                         }
2094                 }
2095         }
2096         return (0);
2097 }
2098
2099 void
2100 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2101     void *ptr, uint32_t val SCTP_UNUSED)
2102 {
2103         struct sctp_asconf_iterator *asc;
2104         struct sctp_ifa *ifa;
2105         struct sctp_laddr *l;
2106         int cnt_invalid = 0;
2107         int type, status;
2108         int num_queued = 0;
2109
2110         asc = (struct sctp_asconf_iterator *)ptr;
2111         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2112                 ifa = l->ifa;
2113                 type = l->action;
2114
2115                 /* address's vrf_id must be the vrf_id of the assoc */
2116                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2117                         continue;
2118                 }
2119
2120                 /* Same checks again for assoc */
2121                 switch (ifa->address.sa.sa_family) {
2122 #ifdef INET6
2123                 case AF_INET6:
2124                         {
2125                                 /* invalid if we're not a v6 endpoint */
2126                                 struct sockaddr_in6 *sin6;
2127
2128                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2129                                         cnt_invalid++;
2130                                         if (asc->cnt == cnt_invalid)
2131                                                 return;
2132                                         else
2133                                                 continue;
2134                                 }
2135                                 sin6 = &ifa->address.sin6;
2136                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2137                                         /* we skip unspecifed addresses */
2138                                         continue;
2139                                 }
2140                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2141                                     &sin6->sin6_addr) != 0) {
2142                                         continue;
2143                                 }
2144                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2145                                         if (stcb->asoc.scope.local_scope == 0) {
2146                                                 continue;
2147                                         }
2148                                         /* is it the right link local scope? */
2149                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2150                                                 continue;
2151                                         }
2152                                 }
2153                                 break;
2154                         }
2155 #endif
2156 #ifdef INET
2157                 case AF_INET:
2158                         {
2159                                 /* invalid if we are a v6 only endpoint */
2160                                 struct sockaddr_in *sin;
2161
2162                                 /* invalid if we are a v6 only endpoint */
2163                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2164                                     SCTP_IPV6_V6ONLY(inp))
2165                                         continue;
2166
2167                                 sin = &ifa->address.sin;
2168                                 if (sin->sin_addr.s_addr == 0) {
2169                                         /* we skip unspecifed addresses */
2170                                         continue;
2171                                 }
2172                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2173                                     &sin->sin_addr) != 0) {
2174                                         continue;
2175                                 }
2176                                 if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2177                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2178                                         continue;
2179                                 }
2180                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2181                                     SCTP_IPV6_V6ONLY(inp)) {
2182                                         cnt_invalid++;
2183                                         if (asc->cnt == cnt_invalid)
2184                                                 return;
2185                                         else
2186                                                 continue;
2187                                 }
2188                                 break;
2189                         }
2190 #endif
2191                 default:
2192                         /* invalid address family */
2193                         cnt_invalid++;
2194                         if (asc->cnt == cnt_invalid)
2195                                 return;
2196                         else
2197                                 continue;
2198                         break;
2199                 }
2200
2201                 if (type == SCTP_ADD_IP_ADDRESS) {
2202                         /* prevent this address from being used as a source */
2203                         sctp_add_local_addr_restricted(stcb, ifa);
2204                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2205                         struct sctp_nets *net;
2206
2207                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2208                                 /* delete this address if cached */
2209                                 if (net->ro._s_addr == ifa) {
2210                                         sctp_free_ifa(net->ro._s_addr);
2211                                         net->ro._s_addr = NULL;
2212                                         net->src_addr_selected = 0;
2213                                         RO_NHFREE(&net->ro);
2214                                         /*
2215                                          * Now we deleted our src address,
2216                                          * should we not also now reset the
2217                                          * cwnd/rto to start as if its a new
2218                                          * address?
2219                                          */
2220                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2221                                         net->RTO = 0;
2222                                 }
2223                         }
2224                 } else if (type == SCTP_SET_PRIM_ADDR) {
2225                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2226                                 /* must validate the ifa is in the ep */
2227                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2228                                         continue;
2229                                 }
2230                         } else {
2231                                 /* Need to check scopes for this guy */
2232                                 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2233                                         continue;
2234                                 }
2235                         }
2236                 }
2237                 /* queue an asconf for this address add/delete */
2238                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2239                     stcb->asoc.asconf_supported == 1) {
2240                         /* queue an asconf for this addr */
2241                         status = sctp_asconf_queue_add(stcb, ifa, type);
2242                         /*
2243                          * if queued ok, and in the open state, update the
2244                          * count of queued params.  If in the non-open
2245                          * state, these get sent when the assoc goes open.
2246                          */
2247                         if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2248                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2249                                 if (status >= 0) {
2250                                         num_queued++;
2251                                 }
2252                         }
2253                 }
2254         }
2255         /*
2256          * If we have queued params in the open state, send out an ASCONF.
2257          */
2258         if (num_queued > 0) {
2259                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2260         }
2261 }
2262
2263 void
2264 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2265 {
2266         struct sctp_asconf_iterator *asc;
2267         struct sctp_ifa *ifa;
2268         struct sctp_laddr *l, *nl;
2269
2270         asc = (struct sctp_asconf_iterator *)ptr;
2271         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2272                 ifa = l->ifa;
2273                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2274                         /* Clear the defer use flag */
2275                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2276                 }
2277                 sctp_free_ifa(ifa);
2278                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2279                 SCTP_DECR_LADDR_COUNT();
2280         }
2281         SCTP_FREE(asc, SCTP_M_ASC_IT);
2282 }
2283
2284 /*
2285  * sa is the sockaddr to ask the peer to set primary to.
2286  * returns: 0 = completed, -1 = error
2287  */
2288 int32_t
2289 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2290 {
2291         uint32_t vrf_id;
2292         struct sctp_ifa *ifa;
2293
2294         /* find the ifa for the desired set primary */
2295         vrf_id = stcb->asoc.vrf_id;
2296         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2297         if (ifa == NULL) {
2298                 /* Invalid address */
2299                 return (-1);
2300         }
2301
2302         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2303         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2304                 /* set primary queuing succeeded */
2305                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2306                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2307                     (void *)stcb);
2308                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2309                 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2310                     (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2311 #ifdef SCTP_TIMER_BASED_ASCONF
2312                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2313                             stcb->sctp_ep, stcb,
2314                             stcb->asoc.primary_destination);
2315 #else
2316                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2317 #endif
2318                 }
2319         } else {
2320                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2321                     (void *)stcb);
2322                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2323                 return (-1);
2324         }
2325         return (0);
2326 }
2327
2328 int
2329 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2330 {
2331         struct sctp_tmit_chunk *chk, *nchk;
2332         unsigned int offset, asconf_limit;
2333         struct sctp_asconf_chunk *acp;
2334         struct sctp_asconf_paramhdr *aph;
2335         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2336         struct sctp_paramhdr *ph;
2337         int add_cnt, del_cnt;
2338         uint16_t last_param_type;
2339
2340         add_cnt = del_cnt = 0;
2341         last_param_type = 0;
2342         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2343                 if (chk->data == NULL) {
2344                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2345                         continue;
2346                 }
2347                 offset = 0;
2348                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2349                 offset += sizeof(struct sctp_asconf_chunk);
2350                 asconf_limit = ntohs(acp->ch.chunk_length);
2351                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2352                 if (ph == NULL) {
2353                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2354                         continue;
2355                 }
2356                 offset += ntohs(ph->param_length);
2357
2358                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2359                 if (aph == NULL) {
2360                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2361                         continue;
2362                 }
2363                 while (aph != NULL) {
2364                         unsigned int param_length, param_type;
2365
2366                         param_type = ntohs(aph->ph.param_type);
2367                         param_length = ntohs(aph->ph.param_length);
2368                         if (offset + param_length > asconf_limit) {
2369                                 /* parameter goes beyond end of chunk! */
2370                                 break;
2371                         }
2372                         if (param_length > sizeof(aparam_buf)) {
2373                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2374                                 break;
2375                         }
2376                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2377                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2378                                 break;
2379                         }
2380
2381                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2382                         if (aph == NULL) {
2383                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2384                                 break;
2385                         }
2386
2387                         ph = (struct sctp_paramhdr *)(aph + 1);
2388                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2389                                 switch (param_type) {
2390                                 case SCTP_ADD_IP_ADDRESS:
2391                                         add_cnt++;
2392                                         break;
2393                                 case SCTP_DEL_IP_ADDRESS:
2394                                         del_cnt++;
2395                                         break;
2396                                 default:
2397                                         break;
2398                                 }
2399                                 last_param_type = param_type;
2400                         }
2401
2402                         offset += SCTP_SIZE32(param_length);
2403                         if (offset >= asconf_limit) {
2404                                 /* no more data in the mbuf chain */
2405                                 break;
2406                         }
2407                         /* get pointer to next asconf param */
2408                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2409                 }
2410         }
2411
2412         /*
2413          * we want to find the sequences which consist of ADD -> DEL -> ADD
2414          * or DEL -> ADD
2415          */
2416         if (add_cnt > del_cnt ||
2417             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2418                 return (1);
2419         }
2420         return (0);
2421 }
2422
2423 static struct sockaddr *
2424 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2425 {
2426         struct sctp_vrf *vrf = NULL;
2427         struct sctp_ifn *sctp_ifn;
2428         struct sctp_ifa *sctp_ifa;
2429
2430         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2431                 SCTP_IPI_ADDR_RLOCK();
2432         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2433         if (vrf == NULL) {
2434                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2435                         SCTP_IPI_ADDR_RUNLOCK();
2436                 return (NULL);
2437         }
2438         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2439                 if (stcb->asoc.scope.loopback_scope == 0 &&
2440                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2441                         /* Skip if loopback_scope not set */
2442                         continue;
2443                 }
2444                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2445                         switch (sctp_ifa->address.sa.sa_family) {
2446 #ifdef INET
2447                         case AF_INET:
2448                                 if (stcb->asoc.scope.ipv4_addr_legal) {
2449                                         struct sockaddr_in *sin;
2450
2451                                         sin = &sctp_ifa->address.sin;
2452                                         if (sin->sin_addr.s_addr == 0) {
2453                                                 /* skip unspecifed addresses */
2454                                                 continue;
2455                                         }
2456                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
2457                                             &sin->sin_addr) != 0) {
2458                                                 continue;
2459                                         }
2460                                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2461                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2462                                                 continue;
2463
2464                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2465                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2466                                                 continue;
2467                                         /*
2468                                          * found a valid local v4 address to
2469                                          * use
2470                                          */
2471                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2472                                                 SCTP_IPI_ADDR_RUNLOCK();
2473                                         return (&sctp_ifa->address.sa);
2474                                 }
2475                                 break;
2476 #endif
2477 #ifdef INET6
2478                         case AF_INET6:
2479                                 if (stcb->asoc.scope.ipv6_addr_legal) {
2480                                         struct sockaddr_in6 *sin6;
2481
2482                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2483                                                 continue;
2484                                         }
2485
2486                                         sin6 = &sctp_ifa->address.sin6;
2487                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2488                                                 /*
2489                                                  * we skip unspecifed
2490                                                  * addresses
2491                                                  */
2492                                                 continue;
2493                                         }
2494                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
2495                                             &sin6->sin6_addr) != 0) {
2496                                                 continue;
2497                                         }
2498                                         if (stcb->asoc.scope.local_scope == 0 &&
2499                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2500                                                 continue;
2501                                         if (stcb->asoc.scope.site_scope == 0 &&
2502                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2503                                                 continue;
2504
2505                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2506                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2507                                                 continue;
2508                                         /*
2509                                          * found a valid local v6 address to
2510                                          * use
2511                                          */
2512                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2513                                                 SCTP_IPI_ADDR_RUNLOCK();
2514                                         return (&sctp_ifa->address.sa);
2515                                 }
2516                                 break;
2517 #endif
2518                         default:
2519                                 break;
2520                         }
2521                 }
2522         }
2523         /* no valid addresses found */
2524         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2525                 SCTP_IPI_ADDR_RUNLOCK();
2526         return (NULL);
2527 }
2528
2529 static struct sockaddr *
2530 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2531 {
2532         struct sctp_laddr *laddr;
2533
2534         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2535                 if (laddr->ifa == NULL) {
2536                         continue;
2537                 }
2538                 /* is the address restricted ? */
2539                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2540                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2541                         continue;
2542
2543                 /* found a valid local address to use */
2544                 return (&laddr->ifa->address.sa);
2545         }
2546         /* no valid addresses found */
2547         return (NULL);
2548 }
2549
2550 /*
2551  * builds an ASCONF chunk from queued ASCONF params.
2552  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2553  */
2554 struct mbuf *
2555 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2556 {
2557         struct mbuf *m_asconf, *m_asconf_chk;
2558         struct sctp_asconf_addr *aa;
2559         struct sctp_asconf_chunk *acp;
2560         struct sctp_asconf_paramhdr *aph;
2561         struct sctp_asconf_addr_param *aap;
2562         uint32_t p_length;
2563         uint32_t correlation_id = 1;    /* 0 is reserved... */
2564         caddr_t ptr, lookup_ptr;
2565         uint8_t lookup_used = 0;
2566
2567         /* are there any asconf params to send? */
2568         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2569                 if (aa->sent == 0)
2570                         break;
2571         }
2572         if (aa == NULL)
2573                 return (NULL);
2574
2575         /*
2576          * get a chunk header mbuf and a cluster for the asconf params since
2577          * it's simpler to fill in the asconf chunk header lookup address on
2578          * the fly
2579          */
2580         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA);
2581         if (m_asconf_chk == NULL) {
2582                 /* no mbuf's */
2583                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2584                     "sctp_compose_asconf: couldn't get chunk mbuf!\n");
2585                 return (NULL);
2586         }
2587         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
2588         if (m_asconf == NULL) {
2589                 /* no mbuf's */
2590                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2591                     "sctp_compose_asconf: couldn't get mbuf!\n");
2592                 sctp_m_freem(m_asconf_chk);
2593                 return (NULL);
2594         }
2595         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2596         SCTP_BUF_LEN(m_asconf) = 0;
2597         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2598         memset(acp, 0, sizeof(struct sctp_asconf_chunk));
2599         /* save pointers to lookup address and asconf params */
2600         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2601         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2602
2603         /* fill in chunk header info */
2604         acp->ch.chunk_type = SCTP_ASCONF;
2605         acp->ch.chunk_flags = 0;
2606         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2607         stcb->asoc.asconf_seq_out++;
2608
2609         /* add parameters... up to smallest MTU allowed */
2610         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2611                 if (aa->sent)
2612                         continue;
2613                 /* get the parameter length */
2614                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2615                 /* will it fit in current chunk? */
2616                 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) ||
2617                     (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) {
2618                         /* won't fit, so we're done with this chunk */
2619                         break;
2620                 }
2621                 /* assign (and store) a correlation id */
2622                 aa->ap.aph.correlation_id = correlation_id++;
2623
2624                 /*
2625                  * fill in address if we're doing a delete this is a simple
2626                  * way for us to fill in the correlation address, which
2627                  * should only be used by the peer if we're deleting our
2628                  * source address and adding a new address (e.g. renumbering
2629                  * case)
2630                  */
2631                 if (lookup_used == 0 &&
2632                     (aa->special_del == 0) &&
2633                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2634                         struct sctp_ipv6addr_param *lookup;
2635                         uint16_t p_size, addr_size;
2636
2637                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2638                         lookup->ph.param_type =
2639                             htons(aa->ap.addrp.ph.param_type);
2640                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2641                                 /* copy IPv6 address */
2642                                 p_size = sizeof(struct sctp_ipv6addr_param);
2643                                 addr_size = sizeof(struct in6_addr);
2644                         } else {
2645                                 /* copy IPv4 address */
2646                                 p_size = sizeof(struct sctp_ipv4addr_param);
2647                                 addr_size = sizeof(struct in_addr);
2648                         }
2649                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2650                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2651                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2652                         lookup_used = 1;
2653                 }
2654                 /* copy into current space */
2655                 memcpy(ptr, &aa->ap, p_length);
2656
2657                 /* network elements and update lengths */
2658                 aph = (struct sctp_asconf_paramhdr *)ptr;
2659                 aap = (struct sctp_asconf_addr_param *)ptr;
2660                 /* correlation_id is transparent to peer, no htonl needed */
2661                 aph->ph.param_type = htons(aph->ph.param_type);
2662                 aph->ph.param_length = htons(aph->ph.param_length);
2663                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2664                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2665
2666                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2667                 ptr += SCTP_SIZE32(p_length);
2668
2669                 /*
2670                  * these params are removed off the pending list upon
2671                  * getting an ASCONF-ACK back from the peer, just set flag
2672                  */
2673                 aa->sent = 1;
2674         }
2675         /* check to see if the lookup addr has been populated yet */
2676         if (lookup_used == 0) {
2677                 /* NOTE: if the address param is optional, can skip this... */
2678                 /* add any valid (existing) address... */
2679                 struct sctp_ipv6addr_param *lookup;
2680                 uint16_t p_size, addr_size;
2681                 struct sockaddr *found_addr;
2682                 caddr_t addr_ptr;
2683
2684                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2685                         found_addr = sctp_find_valid_localaddr(stcb,
2686                             addr_locked);
2687                 else
2688                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2689
2690                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2691                 if (found_addr != NULL) {
2692                         switch (found_addr->sa_family) {
2693 #ifdef INET6
2694                         case AF_INET6:
2695                                 /* copy IPv6 address */
2696                                 lookup->ph.param_type =
2697                                     htons(SCTP_IPV6_ADDRESS);
2698                                 p_size = sizeof(struct sctp_ipv6addr_param);
2699                                 addr_size = sizeof(struct in6_addr);
2700                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2701                                     found_addr)->sin6_addr;
2702                                 break;
2703 #endif
2704 #ifdef INET
2705                         case AF_INET:
2706                                 /* copy IPv4 address */
2707                                 lookup->ph.param_type =
2708                                     htons(SCTP_IPV4_ADDRESS);
2709                                 p_size = sizeof(struct sctp_ipv4addr_param);
2710                                 addr_size = sizeof(struct in_addr);
2711                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2712                                     found_addr)->sin_addr;
2713                                 break;
2714 #endif
2715                         default:
2716                                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2717                                     "sctp_compose_asconf: no usable lookup addr (family = %d)!\n",
2718                                     found_addr->sa_family);
2719                                 sctp_m_freem(m_asconf_chk);
2720                                 sctp_m_freem(m_asconf);
2721                                 return (NULL);
2722                         }
2723                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2724                         memcpy(lookup->addr, addr_ptr, addr_size);
2725                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2726                 } else {
2727                         /* uh oh... don't have any address?? */
2728                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2729                             "sctp_compose_asconf: no lookup addr!\n");
2730                         sctp_m_freem(m_asconf_chk);
2731                         sctp_m_freem(m_asconf);
2732                         return (NULL);
2733                 }
2734         }
2735         /* chain it all together */
2736         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2737         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2738         acp->ch.chunk_length = htons(*retlen);
2739
2740         return (m_asconf_chk);
2741 }
2742
2743 /*
2744  * section to handle address changes before an association is up eg. changes
2745  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2746  */
2747
2748 /*
2749  * processes the (local) addresses in the INIT-ACK chunk
2750  */
2751 static void
2752 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2753     unsigned int offset, unsigned int length)
2754 {
2755         struct sctp_paramhdr tmp_param, *ph;
2756         uint16_t plen, ptype;
2757         struct sctp_ifa *sctp_ifa;
2758         union sctp_sockstore store;
2759 #ifdef INET6
2760         struct sctp_ipv6addr_param addr6_store;
2761 #endif
2762 #ifdef INET
2763         struct sctp_ipv4addr_param addr4_store;
2764 #endif
2765
2766         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2767         if (stcb == NULL)       /* Un-needed check for SA */
2768                 return;
2769
2770         /* convert to upper bound */
2771         length += offset;
2772
2773         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2774                 return;
2775         }
2776         /* go through the addresses in the init-ack */
2777         ph = (struct sctp_paramhdr *)
2778             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2779             (uint8_t *)&tmp_param);
2780         while (ph != NULL) {
2781                 ptype = ntohs(ph->param_type);
2782                 plen = ntohs(ph->param_length);
2783                 switch (ptype) {
2784 #ifdef INET6
2785                 case SCTP_IPV6_ADDRESS:
2786                         {
2787                                 struct sctp_ipv6addr_param *a6p;
2788
2789                                 /* get the entire IPv6 address param */
2790                                 a6p = (struct sctp_ipv6addr_param *)
2791                                     sctp_m_getptr(m, offset,
2792                                     sizeof(struct sctp_ipv6addr_param),
2793                                     (uint8_t *)&addr6_store);
2794                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2795                                     a6p == NULL) {
2796                                         return;
2797                                 }
2798                                 memset(&store, 0, sizeof(union sctp_sockstore));
2799                                 store.sin6.sin6_family = AF_INET6;
2800                                 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2801                                 store.sin6.sin6_port = stcb->rport;
2802                                 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr));
2803                                 break;
2804                         }
2805 #endif
2806 #ifdef INET
2807                 case SCTP_IPV4_ADDRESS:
2808                         {
2809                                 struct sctp_ipv4addr_param *a4p;
2810
2811                                 /* get the entire IPv4 address param */
2812                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2813                                     sizeof(struct sctp_ipv4addr_param),
2814                                     (uint8_t *)&addr4_store);
2815                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2816                                     a4p == NULL) {
2817                                         return;
2818                                 }
2819                                 memset(&store, 0, sizeof(union sctp_sockstore));
2820                                 store.sin.sin_family = AF_INET;
2821                                 store.sin.sin_len = sizeof(struct sockaddr_in);
2822                                 store.sin.sin_port = stcb->rport;
2823                                 store.sin.sin_addr.s_addr = a4p->addr;
2824                                 break;
2825                         }
2826 #endif
2827                 default:
2828                         goto next_addr;
2829                 }
2830
2831                 /* see if this address really (still) exists */
2832                 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id,
2833                     SCTP_ADDR_NOT_LOCKED);
2834                 if (sctp_ifa == NULL) {
2835                         /* address doesn't exist anymore */
2836                         int status;
2837
2838                         /* are ASCONFs allowed ? */
2839                         if ((sctp_is_feature_on(stcb->sctp_ep,
2840                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2841                             stcb->asoc.asconf_supported) {
2842                                 /* queue an ASCONF DEL_IP_ADDRESS */
2843                                 status = sctp_asconf_queue_sa_delete(stcb, &store.sa);
2844                                 /*
2845                                  * if queued ok, and in correct state, send
2846                                  * out the ASCONF.
2847                                  */
2848                                 if (status == 0 &&
2849                                     SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
2850 #ifdef SCTP_TIMER_BASED_ASCONF
2851                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2852                                             stcb->sctp_ep, stcb,
2853                                             stcb->asoc.primary_destination);
2854 #else
2855                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2856 #endif
2857                                 }
2858                         }
2859                 }
2860
2861 next_addr:
2862                 /*
2863                  * Sanity check:  Make sure the length isn't 0, otherwise
2864                  * we'll be stuck in this loop for a long time...
2865                  */
2866                 if (SCTP_SIZE32(plen) == 0) {
2867                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2868                             plen, ptype);
2869                         return;
2870                 }
2871                 /* get next parameter */
2872                 offset += SCTP_SIZE32(plen);
2873                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2874                         return;
2875                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2876                     sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2877         }                       /* while */
2878 }
2879
2880 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2881 /*
2882  * checks to see if a specific address is in the initack address list returns
2883  * 1 if found, 0 if not
2884  */
2885 static uint32_t
2886 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
2887 {
2888         struct sctp_paramhdr tmp_param, *ph;
2889         uint16_t plen, ptype;
2890 #ifdef INET
2891         struct sockaddr_in *sin;
2892         struct sctp_ipv4addr_param *a4p;
2893         struct sctp_ipv6addr_param addr4_store;
2894 #endif
2895 #ifdef INET6
2896         struct sockaddr_in6 *sin6;
2897         struct sctp_ipv6addr_param *a6p;
2898         struct sctp_ipv6addr_param addr6_store;
2899         struct sockaddr_in6 sin6_tmp;
2900 #endif
2901
2902         switch (sa->sa_family) {
2903 #ifdef INET
2904         case AF_INET:
2905                 break;
2906 #endif
2907 #ifdef INET6
2908         case AF_INET6:
2909                 break;
2910 #endif
2911         default:
2912                 return (0);
2913         }
2914
2915         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2916         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2917         /* convert to upper bound */
2918         length += offset;
2919
2920         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2921                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2922                     "find_initack_addr: invalid offset?\n");
2923                 return (0);
2924         }
2925         /* go through the addresses in the init-ack */
2926         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2927             sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2928         while (ph != NULL) {
2929                 ptype = ntohs(ph->param_type);
2930                 plen = ntohs(ph->param_length);
2931                 switch (ptype) {
2932 #ifdef INET6
2933                 case SCTP_IPV6_ADDRESS:
2934                         if (sa->sa_family == AF_INET6) {
2935                                 /* get the entire IPv6 address param */
2936                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
2937                                         break;
2938                                 }
2939                                 /* get the entire IPv6 address param */
2940                                 a6p = (struct sctp_ipv6addr_param *)
2941                                     sctp_m_getptr(m, offset,
2942                                     sizeof(struct sctp_ipv6addr_param),
2943                                     (uint8_t *)&addr6_store);
2944                                 if (a6p == NULL) {
2945                                         return (0);
2946                                 }
2947                                 sin6 = (struct sockaddr_in6 *)sa;
2948                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2949                                         /* create a copy and clear scope */
2950                                         memcpy(&sin6_tmp, sin6,
2951                                             sizeof(struct sockaddr_in6));
2952                                         sin6 = &sin6_tmp;
2953                                         in6_clearscope(&sin6->sin6_addr);
2954                                 }
2955                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
2956                                     sizeof(struct in6_addr)) == 0) {
2957                                         /* found it */
2958                                         return (1);
2959                                 }
2960                         }
2961                         break;
2962 #endif                          /* INET6 */
2963 #ifdef INET
2964                 case SCTP_IPV4_ADDRESS:
2965                         if (sa->sa_family == AF_INET) {
2966                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
2967                                         break;
2968                                 }
2969                                 /* get the entire IPv4 address param */
2970                                 a4p = (struct sctp_ipv4addr_param *)
2971                                     sctp_m_getptr(m, offset,
2972                                     sizeof(struct sctp_ipv4addr_param),
2973                                     (uint8_t *)&addr4_store);
2974                                 if (a4p == NULL) {
2975                                         return (0);
2976                                 }
2977                                 sin = (struct sockaddr_in *)sa;
2978                                 if (sin->sin_addr.s_addr == a4p->addr) {
2979                                         /* found it */
2980                                         return (1);
2981                                 }
2982                         }
2983                         break;
2984 #endif
2985                 default:
2986                         break;
2987                 }
2988                 /* get next parameter */
2989                 offset += SCTP_SIZE32(plen);
2990                 if (offset + sizeof(struct sctp_paramhdr) > length) {
2991                         return (0);
2992                 }
2993                 ph = (struct sctp_paramhdr *)
2994                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2995                     (uint8_t *)&tmp_param);
2996         }                       /* while */
2997         /* not found! */
2998         return (0);
2999 }
3000
3001 /*
3002  * makes sure that the current endpoint local addr list is consistent with
3003  * the new association (eg. subset bound, asconf allowed) adds addresses as
3004  * necessary
3005  */
3006 static void
3007 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3008     int length, struct sockaddr *init_addr)
3009 {
3010         struct sctp_laddr *laddr;
3011
3012         /* go through the endpoint list */
3013         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3014                 /* be paranoid and validate the laddr */
3015                 if (laddr->ifa == NULL) {
3016                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3017                             "check_addr_list_ep: laddr->ifa is NULL");
3018                         continue;
3019                 }
3020                 /* do i have it implicitly? */
3021                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3022                         continue;
3023                 }
3024                 /* check to see if in the init-ack */
3025                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3026                         /* try to add it */
3027                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3028                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3029                 }
3030         }
3031 }
3032
3033 /*
3034  * makes sure that the current kernel address list is consistent with the new
3035  * association (with all addrs bound) adds addresses as necessary
3036  */
3037 static void
3038 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3039     int length, struct sockaddr *init_addr,
3040     uint16_t local_scope, uint16_t site_scope,
3041     uint16_t ipv4_scope, uint16_t loopback_scope)
3042 {
3043         struct sctp_vrf *vrf = NULL;
3044         struct sctp_ifn *sctp_ifn;
3045         struct sctp_ifa *sctp_ifa;
3046         uint32_t vrf_id;
3047 #ifdef INET
3048         struct sockaddr_in *sin;
3049 #endif
3050 #ifdef INET6
3051         struct sockaddr_in6 *sin6;
3052 #endif
3053
3054         if (stcb) {
3055                 vrf_id = stcb->asoc.vrf_id;
3056         } else {
3057                 return;
3058         }
3059         SCTP_IPI_ADDR_RLOCK();
3060         vrf = sctp_find_vrf(vrf_id);
3061         if (vrf == NULL) {
3062                 SCTP_IPI_ADDR_RUNLOCK();
3063                 return;
3064         }
3065         /* go through all our known interfaces */
3066         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3067                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3068                         /* skip loopback interface */
3069                         continue;
3070                 }
3071                 /* go through each interface address */
3072                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3073                         /* do i have it implicitly? */
3074                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3075                                 continue;
3076                         }
3077                         switch (sctp_ifa->address.sa.sa_family) {
3078 #ifdef INET
3079                         case AF_INET:
3080                                 sin = &sctp_ifa->address.sin;
3081                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3082                                     &sin->sin_addr) != 0) {
3083                                         continue;
3084                                 }
3085                                 if ((ipv4_scope == 0) &&
3086                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3087                                         /* private address not in scope */
3088                                         continue;
3089                                 }
3090                                 break;
3091 #endif
3092 #ifdef INET6
3093                         case AF_INET6:
3094                                 sin6 = &sctp_ifa->address.sin6;
3095                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3096                                     &sin6->sin6_addr) != 0) {
3097                                         continue;
3098                                 }
3099                                 if ((local_scope == 0) &&
3100                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3101                                         continue;
3102                                 }
3103                                 if ((site_scope == 0) &&
3104                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3105                                         continue;
3106                                 }
3107                                 break;
3108 #endif
3109                         default:
3110                                 break;
3111                         }
3112                         /* check to see if in the init-ack */
3113                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3114                                 /* try to add it */
3115                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3116                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3117                                     SCTP_ADDR_LOCKED);
3118                         }
3119                 }               /* end foreach ifa */
3120         }                       /* end foreach ifn */
3121         SCTP_IPI_ADDR_RUNLOCK();
3122 }
3123
3124 /*
3125  * validates an init-ack chunk (from a cookie-echo) with current addresses
3126  * adds addresses from the init-ack into our local address list, if needed
3127  * queues asconf adds/deletes addresses as needed and makes appropriate list
3128  * changes for source address selection m, offset: points to the start of the
3129  * address list in an init-ack chunk length: total length of the address
3130  * params only init_addr: address where my INIT-ACK was sent from
3131  */
3132 void
3133 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3134     int length, struct sockaddr *init_addr,
3135     uint16_t local_scope, uint16_t site_scope,
3136     uint16_t ipv4_scope, uint16_t loopback_scope)
3137 {
3138         /* process the local addresses in the initack */
3139         sctp_process_initack_addresses(stcb, m, offset, length);
3140
3141         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3142                 /* bound all case */
3143                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3144                     local_scope, site_scope, ipv4_scope, loopback_scope);
3145         } else {
3146                 /* subset bound case */
3147                 if (sctp_is_feature_on(stcb->sctp_ep,
3148                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3149                         /* asconf's allowed */
3150                         sctp_check_address_list_ep(stcb, m, offset, length,
3151                             init_addr);
3152                 }
3153                 /* else, no asconfs allowed, so what we sent is what we get */
3154         }
3155 }
3156
3157 /*
3158  * sctp_bindx() support
3159  */
3160 uint32_t
3161 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3162     uint32_t type, uint32_t vrf_id)
3163 {
3164         struct sctp_ifa *ifa;
3165         struct sctp_laddr *laddr, *nladdr;
3166
3167         if (sa->sa_len == 0) {
3168                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3169                 return (EINVAL);
3170         }
3171         if (type == SCTP_ADD_IP_ADDRESS) {
3172                 /* For an add the address MUST be on the system */
3173                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3174         } else if (type == SCTP_DEL_IP_ADDRESS) {
3175                 /* For a delete we need to find it in the inp */
3176                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3177         } else {
3178                 ifa = NULL;
3179         }
3180         if (ifa != NULL) {
3181                 if (type == SCTP_ADD_IP_ADDRESS) {
3182                         sctp_add_local_addr_ep(inp, ifa, type);
3183                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3184                         if (inp->laddr_count < 2) {
3185                                 /* can't delete the last local address */
3186                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3187                                 return (EINVAL);
3188                         }
3189                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3190                             sctp_nxt_addr) {
3191                                 if (ifa == laddr->ifa) {
3192                                         /* Mark in the delete */
3193                                         laddr->action = type;
3194                                 }
3195                         }
3196                 }
3197                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3198                         /*
3199                          * There is no need to start the iterator if the inp
3200                          * has no associations.
3201                          */
3202                         if (type == SCTP_DEL_IP_ADDRESS) {
3203                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3204                                         if (laddr->ifa == ifa) {
3205                                                 sctp_del_local_addr_ep(inp, ifa);
3206                                         }
3207                                 }
3208                         }
3209                 } else {
3210                         struct sctp_asconf_iterator *asc;
3211                         struct sctp_laddr *wi;
3212                         int ret;
3213
3214                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3215                             sizeof(struct sctp_asconf_iterator),
3216                             SCTP_M_ASC_IT);
3217                         if (asc == NULL) {
3218                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3219                                 return (ENOMEM);
3220                         }
3221                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3222                         if (wi == NULL) {
3223                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3224                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3225                                 return (ENOMEM);
3226                         }
3227                         LIST_INIT(&asc->list_of_work);
3228                         asc->cnt = 1;
3229                         SCTP_INCR_LADDR_COUNT();
3230                         wi->ifa = ifa;
3231                         wi->action = type;
3232                         atomic_add_int(&ifa->refcount, 1);
3233                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3234                         ret = sctp_initiate_iterator(sctp_asconf_iterator_ep,
3235                             sctp_asconf_iterator_stcb,
3236                             sctp_asconf_iterator_ep_end,
3237                             SCTP_PCB_ANY_FLAGS,
3238                             SCTP_PCB_ANY_FEATURES,
3239                             SCTP_ASOC_ANY_STATE,
3240                             (void *)asc, 0,
3241                             sctp_asconf_iterator_end, inp, 0);
3242                         if (ret) {
3243                                 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n");
3244                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT);
3245                                 sctp_asconf_iterator_end(asc, 0);
3246                                 return (EFAULT);
3247                         }
3248                 }
3249                 return (0);
3250         } else {
3251                 /* invalid address! */
3252                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3253                 return (EADDRNOTAVAIL);
3254         }
3255 }
3256
3257 void
3258 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, struct sctp_nets *net)
3259 {
3260         struct sctp_asconf_addr *aa_vtag, *aa_add, *aa_del;
3261         struct sctp_ifa *sctp_ifap;
3262         struct sctp_asconf_tag_param *vtag;
3263 #ifdef INET
3264         struct sockaddr_in *to;
3265 #endif
3266 #ifdef INET6
3267         struct sockaddr_in6 *to6;
3268 #endif
3269
3270         if (net == NULL) {
3271                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3272                 return;
3273         }
3274         if (stcb == NULL) {
3275                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3276                 return;
3277         }
3278         /*
3279          * Need to have in the ASCONF: - VTAG(my_vtag/peer_vtag) -
3280          * ADD(wildcard) - DEL(wildcard) - ADD(Any global addresses)
3281          */
3282         SCTP_MALLOC(aa_vtag, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR);
3283         SCTP_MALLOC(aa_add, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR);
3284         SCTP_MALLOC(aa_del, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR);
3285
3286         if ((aa_vtag == NULL) || (aa_add == NULL) || (aa_del == NULL)) {
3287                 /* Didn't get memory */
3288                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3289 out:
3290                 if (aa_vtag != NULL) {
3291                         SCTP_FREE(aa_vtag, SCTP_M_ASC_ADDR);
3292                 }
3293                 if (aa_add != NULL) {
3294                         SCTP_FREE(aa_add, SCTP_M_ASC_ADDR);
3295                 }
3296                 if (aa_del != NULL) {
3297                         SCTP_FREE(aa_del, SCTP_M_ASC_ADDR);
3298                 }
3299                 return;
3300         }
3301         memset(aa_vtag, 0, sizeof(struct sctp_asconf_addr));
3302         aa_vtag->special_del = 0;
3303         /* Fill in ASCONF address parameter fields. */
3304         /* Top level elements are "networked" during send. */
3305         aa_vtag->ifa = NULL;
3306         aa_vtag->sent = 0;      /* clear sent flag */
3307         vtag = (struct sctp_asconf_tag_param *)&aa_vtag->ap.aph;
3308         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3309         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3310         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3311         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3312
3313         memset(aa_add, 0, sizeof(struct sctp_asconf_addr));
3314         memset(aa_del, 0, sizeof(struct sctp_asconf_addr));
3315         switch (net->ro._l_addr.sa.sa_family) {
3316 #ifdef INET
3317         case AF_INET:
3318                 aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3319                 aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3320                 aa_add->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3321                 aa_add->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3322                 /* No need to fill the address, we are using 0.0.0.0 */
3323                 aa_del->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3324                 aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3325                 aa_del->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3326                 aa_del->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3327                 /* No need to fill the address, we are using 0.0.0.0 */
3328                 break;
3329 #endif
3330 #ifdef INET6
3331         case AF_INET6:
3332                 aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3333                 aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3334                 aa_add->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3335                 aa_add->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3336                 /* No need to fill the address, we are using ::0 */
3337                 aa_del->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3338                 aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3339                 aa_del->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3340                 aa_del->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3341                 /* No need to fill the address, we are using ::0 */
3342                 break;
3343 #endif
3344         default:
3345                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3346                     "sctp_asconf_send_nat_state_update: unknown address family %d\n",
3347                     net->ro._l_addr.sa.sa_family);
3348                 goto out;
3349         }
3350         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_vtag, next);
3351         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_add, next);
3352         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_del, next);
3353
3354         /* Now we must hunt the addresses and add all global addresses */
3355         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3356                 struct sctp_vrf *vrf = NULL;
3357                 struct sctp_ifn *sctp_ifnp;
3358                 uint32_t vrf_id;
3359
3360                 vrf_id = stcb->sctp_ep->def_vrf_id;
3361                 vrf = sctp_find_vrf(vrf_id);
3362                 if (vrf == NULL) {
3363                         goto skip_rest;
3364                 }
3365
3366                 SCTP_IPI_ADDR_RLOCK();
3367                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3368                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3369                                 switch (sctp_ifap->address.sa.sa_family) {
3370 #ifdef INET
3371                                 case AF_INET:
3372                                         to = &sctp_ifap->address.sin;
3373                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3374                                             &to->sin_addr) != 0) {
3375                                                 continue;
3376                                         }
3377                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3378                                                 continue;
3379                                         }
3380                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3381                                                 continue;
3382                                         }
3383                                         break;
3384 #endif
3385 #ifdef INET6
3386                                 case AF_INET6:
3387                                         to6 = &sctp_ifap->address.sin6;
3388                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3389                                             &to6->sin6_addr) != 0) {
3390                                                 continue;
3391                                         }
3392                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3393                                                 continue;
3394                                         }
3395                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3396                                                 continue;
3397                                         }
3398                                         break;
3399 #endif
3400                                 default:
3401                                         continue;
3402                                 }
3403                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3404                         }
3405                 }
3406                 SCTP_IPI_ADDR_RUNLOCK();
3407         } else {
3408                 struct sctp_laddr *laddr;
3409
3410                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3411                         if (laddr->ifa == NULL) {
3412                                 continue;
3413                         }
3414                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3415                                 /*
3416                                  * Address being deleted by the system, dont
3417                                  * list.
3418                                  */
3419                                 continue;
3420                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3421                                 /*
3422                                  * Address being deleted on this ep don't
3423                                  * list.
3424                                  */
3425                                 continue;
3426                         }
3427                         sctp_ifap = laddr->ifa;
3428                         switch (sctp_ifap->address.sa.sa_family) {
3429 #ifdef INET
3430                         case AF_INET:
3431                                 to = &sctp_ifap->address.sin;
3432                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3433                                         continue;
3434                                 }
3435                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3436                                         continue;
3437                                 }
3438                                 break;
3439 #endif
3440 #ifdef INET6
3441                         case AF_INET6:
3442                                 to6 = &sctp_ifap->address.sin6;
3443                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3444                                         continue;
3445                                 }
3446                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3447                                         continue;
3448                                 }
3449                                 break;
3450 #endif
3451                         default:
3452                                 continue;
3453                         }
3454                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3455                 }
3456         }
3457 skip_rest:
3458         /* Now we must send the asconf into the queue */
3459         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3460 }