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
 574                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
 575                             stcb->sctp_ep, stcb, NULL,
 576                             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1);
 577                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 578                             SCTP_MOBILITY_FASTHANDOFF)) {
 579                                 sctp_assoc_immediate_retrans(stcb,
 580                                     stcb->asoc.primary_destination);
 581                         }
 582                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 583                             SCTP_MOBILITY_BASE)) {
 584                                 sctp_move_chunks_from_net(stcb,
 585                                     stcb->asoc.deleted_primary);
 586                         }
 587                         sctp_delete_prim_timer(stcb->sctp_ep, stcb);
 588                 }
 589         } else {
 590                 /* couldn't set the requested primary address! */
 591                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 592                     "process_asconf_set_primary: set primary failed!\n");
 593                 /* must have been an invalid address, so report */
 594                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 595                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 596                     aparam_length);
 597         }
 598
 599         return (m_reply);
 600 }
 601
 602 /*
 603  * handles an ASCONF chunk.
 604  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 605  */
 606 void
 607 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 608     struct sockaddr *src,
 609     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 610     int first)
 611 {
 612         struct sctp_association *asoc;
 613         uint32_t serial_num;
 614         struct mbuf *n, *m_ack, *m_result, *m_tail;
 615         struct sctp_asconf_ack_chunk *ack_cp;
 616         struct sctp_asconf_paramhdr *aph;
 617         struct sctp_ipv6addr_param *p_addr;
 618         unsigned int asconf_limit, cnt;
 619         int error = 0;          /* did an error occur? */
 620
 621         /* asconf param buffer */
 622         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 623         struct sctp_asconf_ack *ack, *ack_next;
 624
 625         /* verify minimum length */
 626         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 627                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 628                     "handle_asconf: chunk too small = %xh\n",
 629                     ntohs(cp->ch.chunk_length));
 630                 return;
 631         }
 632         asoc = &stcb->asoc;
 633         serial_num = ntohl(cp->serial_number);
 634
 635         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 636                 /* got a duplicate ASCONF */
 637                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 638                     "handle_asconf: got duplicate serial number = %xh\n",
 639                     serial_num);
 640                 return;
 641         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 642                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 643                     serial_num, asoc->asconf_seq_in + 1);
 644                 return;
 645         }
 646
 647         /* it's the expected "next" sequence number, so process it */
 648         asoc->asconf_seq_in = serial_num;       /* update sequence */
 649         /* get length of all the param's in the ASCONF */
 650         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 651         SCTPDBG(SCTP_DEBUG_ASCONF1,
 652             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 653             asconf_limit, serial_num);
 654
 655         if (first) {
 656                 /* delete old cache */
 657                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 658
 659                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 660                         if (ack->serial_number == serial_num)
 661                                 break;
 662                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 663                             ack->serial_number, serial_num);
 664                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 665                         if (ack->data != NULL) {
 666                                 sctp_m_freem(ack->data);
 667                         }
 668                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 669                 }
 670         }
 671
 672         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 673             M_NOWAIT, 1, MT_DATA);
 674         if (m_ack == NULL) {
 675                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 676                     "handle_asconf: couldn't get mbuf!\n");
 677                 return;
 678         }
 679         m_tail = m_ack;         /* current reply chain's tail */
 680
 681         /* fill in ASCONF-ACK header */
 682         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 683         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 684         ack_cp->ch.chunk_flags = 0;
 685         ack_cp->serial_number = htonl(serial_num);
 686         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 687         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 688         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 689
 690         /* skip the lookup address parameter */
 691         offset += sizeof(struct sctp_asconf_chunk);
 692         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf);
 693         if (p_addr == NULL) {
 694                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 695                     "handle_asconf: couldn't get lookup addr!\n");
 696                 /* respond with a missing/invalid mandatory parameter error */
 697                 sctp_m_freem(m_ack);
 698                 return;
 699         }
 700         /* skip lookup addr */
 701         offset += SCTP_SIZE32(ntohs(p_addr->ph.param_length));
 702         /* get pointer to first asconf param in ASCONF */
 703         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf);
 704         if (aph == NULL) {
 705                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 706                 goto send_reply;
 707         }
 708         /* process through all parameters */
 709         cnt = 0;
 710         while (aph != NULL) {
 711                 unsigned int param_length, param_type;
 712
 713                 param_type = ntohs(aph->ph.param_type);
 714                 param_length = ntohs(aph->ph.param_length);
 715                 if (offset + param_length > asconf_limit) {
 716                         /* parameter goes beyond end of chunk! */
 717                         sctp_m_freem(m_ack);
 718                         return;
 719                 }
 720                 m_result = NULL;
 721
 722                 if (param_length > sizeof(aparam_buf)) {
 723                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 724                         sctp_m_freem(m_ack);
 725                         return;
 726                 }
 727                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 728                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 729                         sctp_m_freem(m_ack);
 730                         return;
 731                 }
 732                 /* get the entire parameter */
 733                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 734                 if (aph == NULL) {
 735                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 736                         sctp_m_freem(m_ack);
 737                         return;
 738                 }
 739                 switch (param_type) {
 740                 case SCTP_ADD_IP_ADDRESS:
 741                         m_result = sctp_process_asconf_add_ip(src, aph, stcb,
 742                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 743                         cnt++;
 744                         break;
 745                 case SCTP_DEL_IP_ADDRESS:
 746                         m_result = sctp_process_asconf_delete_ip(src, aph, stcb,
 747                             error);
 748                         break;
 749                 case SCTP_ERROR_CAUSE_IND:
 750                         /* not valid in an ASCONF chunk */
 751                         break;
 752                 case SCTP_SET_PRIM_ADDR:
 753                         m_result = sctp_process_asconf_set_primary(src, aph,
 754                             stcb, error);
 755                         break;
 756                 case SCTP_NAT_VTAGS:
 757                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 758                         break;
 759                 case SCTP_SUCCESS_REPORT:
 760                         /* not valid in an ASCONF chunk */
 761                         break;
 762                 case SCTP_ULP_ADAPTATION:
 763                         /* FIX */
 764                         break;
 765                 default:
 766                         if ((param_type & 0x8000) == 0) {
 767                                 /* Been told to STOP at this param */
 768                                 asconf_limit = offset;
 769                                 /*
 770                                  * FIX FIX - We need to call
 771                                  * sctp_arethere_unrecognized_parameters()
 772                                  * to get a operr and send it for any
 773                                  * param's with the 0x4000 bit set OR do it
 774                                  * here ourselves... note we still must STOP
 775                                  * if the 0x8000 bit is clear.
 776                                  */
 777                         }
 778                         /* unknown/invalid param type */
 779                         break;
 780                 }               /* switch */
 781
 782                 /* add any (error) result to the reply mbuf chain */
 783                 if (m_result != NULL) {
 784                         SCTP_BUF_NEXT(m_tail) = m_result;
 785                         m_tail = m_result;
 786                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 787                         /* set flag to force success reports */
 788                         error = 1;
 789                 }
 790                 offset += SCTP_SIZE32(param_length);
 791                 /* update remaining ASCONF message length to process */
 792                 if (offset >= asconf_limit) {
 793                         /* no more data in the mbuf chain */
 794                         break;
 795                 }
 796                 /* get pointer to next asconf param */
 797                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 798                     sizeof(struct sctp_asconf_paramhdr),
 799                     (uint8_t *)&aparam_buf);
 800                 if (aph == NULL) {
 801                         /* can't get an asconf paramhdr */
 802                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 803                         /* FIX ME - add error here... */
 804                 }
 805         }
 806
 807 send_reply:
 808         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 809         /* save the ASCONF-ACK reply */
 810         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 811             struct sctp_asconf_ack);
 812         if (ack == NULL) {
 813                 sctp_m_freem(m_ack);
 814                 return;
 815         }
 816         ack->serial_number = serial_num;
 817         ack->last_sent_to = NULL;
 818         ack->data = m_ack;
 819         ack->len = 0;
 820         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 821                 ack->len += SCTP_BUF_LEN(n);
 822         }
 823         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 824
 825         /* see if last_control_chunk_from is set properly (use IP src addr) */
 826         if (stcb->asoc.last_control_chunk_from == NULL) {
 827                 /*
 828                  * this could happen if the source address was just newly
 829                  * added
 830                  */
 831                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 832                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 833                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 834                 /* look up the from address */
 835                 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src);
 836 #ifdef SCTP_DEBUG
 837                 if (stcb->asoc.last_control_chunk_from == NULL) {
 838                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 839                 }
 840 #endif
 841         }
 842 }
 843
 844 /*
 845  * does the address match? returns 0 if not, 1 if so
 846  */
 847 static uint32_t
 848 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 849 {
 850         switch (sa->sa_family) {
 851 #ifdef INET6
 852         case AF_INET6:
 853                 {
 854                         /* XXX scopeid */
 855                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 856
 857                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 858                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 859                             sizeof(struct in6_addr)) == 0)) {
 860                                 return (1);
 861                         }
 862                         break;
 863                 }
 864 #endif
 865 #ifdef INET
 866         case AF_INET:
 867                 {
 868                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 869
 870                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 871                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 872                             sizeof(struct in_addr)) == 0)) {
 873                                 return (1);
 874                         }
 875                         break;
 876                 }
 877 #endif
 878         default:
 879                 break;
 880         }
 881         return (0);
 882 }
 883
 884 /*
 885  * does the address match? returns 0 if not, 1 if so
 886  */
 887 static uint32_t
 888 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 889 {
 890 #if defined(INET) || defined(INET6)
 891         uint16_t param_type, param_length;
 892
 893         param_type = ntohs(ph->param_type);
 894         param_length = ntohs(ph->param_length);
 895 #endif
 896         switch (sa->sa_family) {
 897 #ifdef INET6
 898         case AF_INET6:
 899                 {
 900                         /* XXX scopeid */
 901                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 902                         struct sctp_ipv6addr_param *v6addr;
 903
 904                         v6addr = (struct sctp_ipv6addr_param *)ph;
 905                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 906                             (param_length == sizeof(struct sctp_ipv6addr_param)) &&
 907                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 908                             sizeof(struct in6_addr)) == 0)) {
 909                                 return (1);
 910                         }
 911                         break;
 912                 }
 913 #endif
 914 #ifdef INET
 915         case AF_INET:
 916                 {
 917                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 918                         struct sctp_ipv4addr_param *v4addr;
 919
 920                         v4addr = (struct sctp_ipv4addr_param *)ph;
 921                         if ((param_type == SCTP_IPV4_ADDRESS) &&
 922                             (param_length == sizeof(struct sctp_ipv4addr_param)) &&
 923                             (memcmp(&v4addr->addr, &sin->sin_addr,
 924                             sizeof(struct in_addr)) == 0)) {
 925                                 return (1);
 926                         }
 927                         break;
 928                 }
 929 #endif
 930         default:
 931                 break;
 932         }
 933         return (0);
 934 }
 935
 936 /*
 937  * Cleanup for non-responded/OP ERR'd ASCONF
 938  */
 939 void
 940 sctp_asconf_cleanup(struct sctp_tcb *stcb)
 941 {
 942         /*
 943          * clear out any existing asconfs going out
 944          */
 945         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL,
 946             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
 947         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
 948         /* remove the old ASCONF on our outbound queue */
 949         sctp_toss_old_asconf(stcb);
 950 }
 951
 952 /*
 953  * cleanup any cached source addresses that may be topologically
 954  * incorrect after a new address has been added to this interface.
 955  */
 956 static void
 957 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
 958 {
 959         struct sctp_nets *net;
 960
 961         /*
 962          * Ideally, we want to only clear cached routes and source addresses
 963          * that are topologically incorrect.  But since there is no easy way
 964          * to know whether the newly added address on the ifn would cause a
 965          * routing change (i.e. a new egress interface would be chosen)
 966          * without doing a new routing lookup and source address selection,
 967          * we will (for now) just flush any cached route using a different
 968          * ifn (and cached source addrs) and let output re-choose them
 969          * during the next send on that net.
 970          */
 971         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 972                 /*
 973                  * clear any cached route (and cached source address) if the
 974                  * route's interface is NOT the same as the address change.
 975                  * If it's the same interface, just clear the cached source
 976                  * address.
 977                  */
 978                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
 979                     ((ifn == NULL) ||
 980                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
 981                         /* clear any cached route */
 982                         RO_NHFREE(&net->ro);
 983                 }
 984                 /* clear any cached source address */
 985                 if (net->src_addr_selected) {
 986                         sctp_free_ifa(net->ro._s_addr);
 987                         net->ro._s_addr = NULL;
 988                         net->src_addr_selected = 0;
 989                 }
 990         }
 991 }
 992
 993
 994 void
 995 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
 996 {
 997         int error;
 998
 999         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
1000                 return;
1001         }
1002         if (stcb->asoc.deleted_primary == NULL) {
1003                 return;
1004         }
1005
1006         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
1007                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
1008                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1009                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
1010                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
1011                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
1012                     stcb->asoc.deleted_primary,
1013                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
1014                 stcb->asoc.num_send_timers_up--;
1015                 if (stcb->asoc.num_send_timers_up < 0) {
1016                         stcb->asoc.num_send_timers_up = 0;
1017                 }
1018                 SCTP_TCB_LOCK_ASSERT(stcb);
1019                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1020                     stcb->asoc.deleted_primary);
1021                 if (error) {
1022                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1023                         return;
1024                 }
1025                 SCTP_TCB_LOCK_ASSERT(stcb);
1026 #ifdef SCTP_AUDITING_ENABLED
1027                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1028 #endif
1029                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1030                 if ((stcb->asoc.num_send_timers_up == 0) &&
1031                     (stcb->asoc.sent_queue_cnt > 0)) {
1032                         struct sctp_tmit_chunk *chk;
1033
1034                         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1035                                 if (chk->whoTo != NULL) {
1036                                         break;
1037                                 }
1038                         }
1039                         if (chk != NULL) {
1040                                 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
1041                         }
1042                 }
1043         }
1044         return;
1045 }
1046
1047 static int
1048     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1049
1050 void
1051 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1052 {
1053         struct sctp_tmit_chunk *chk;
1054
1055         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1056         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1057             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4);
1058         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1059         net->error_count = 0;
1060         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1061                 if (chk->whoTo == net) {
1062                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1063                                 chk->sent = SCTP_DATAGRAM_RESEND;
1064                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1065                                 sctp_flight_size_decrease(chk);
1066                                 sctp_total_flight_decrease(stcb, chk);
1067                                 net->marked_retrans++;
1068                                 stcb->asoc.marked_retrans++;
1069                         }
1070                 }
1071         }
1072         if (net->marked_retrans) {
1073                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1074         }
1075 }
1076
1077 static void
1078 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1079 {
1080         struct sctp_nets *net;
1081         int addrnum, changed;
1082
1083         /*
1084          * If number of local valid addresses is 1, the valid address is
1085          * probably newly added address. Several valid addresses in this
1086          * association.  A source address may not be changed.  Additionally,
1087          * they can be configured on a same interface as "alias" addresses.
1088          * (by micchie)
1089          */
1090         addrnum = sctp_local_addr_count(stcb);
1091         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1092             addrnum);
1093         if (addrnum == 1) {
1094                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1095                         /* clear any cached route and source address */
1096                         RO_NHFREE(&net->ro);
1097                         if (net->src_addr_selected) {
1098                                 sctp_free_ifa(net->ro._s_addr);
1099                                 net->ro._s_addr = NULL;
1100                                 net->src_addr_selected = 0;
1101                         }
1102                         /* Retransmit unacknowledged DATA chunks immediately */
1103                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1104                             SCTP_MOBILITY_FASTHANDOFF)) {
1105                                 sctp_net_immediate_retrans(stcb, net);
1106                         }
1107                         /* also, SET PRIMARY is maybe already sent */
1108                 }
1109                 return;
1110         }
1111
1112         /* Multiple local addresses exsist in the association.  */
1113         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1114                 /* clear any cached route and source address */
1115                 RO_NHFREE(&net->ro);
1116                 if (net->src_addr_selected) {
1117                         sctp_free_ifa(net->ro._s_addr);
1118                         net->ro._s_addr = NULL;
1119                         net->src_addr_selected = 0;
1120                 }
1121                 /*
1122                  * Check if the nexthop is corresponding to the new address.
1123                  * If the new address is corresponding to the current
1124                  * nexthop, the path will be changed. If the new address is
1125                  * NOT corresponding to the current nexthop, the path will
1126                  * not be changed.
1127                  */
1128                 SCTP_RTALLOC((sctp_route_t *)&net->ro,
1129                     stcb->sctp_ep->def_vrf_id,
1130                     stcb->sctp_ep->fibnum);
1131                 if (net->ro.ro_nh == NULL)
1132                         continue;
1133
1134                 changed = 0;
1135                 switch (net->ro._l_addr.sa.sa_family) {
1136 #ifdef INET
1137                 case AF_INET:
1138                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) {
1139                                 changed = 1;
1140                         }
1141                         break;
1142 #endif
1143 #ifdef INET6
1144                 case AF_INET6:
1145                         if (sctp_v6src_match_nexthop(
1146                             &newifa->address.sin6, (sctp_route_t *)&net->ro)) {
1147                                 changed = 1;
1148                         }
1149                         break;
1150 #endif
1151                 default:
1152                         break;
1153                 }
1154                 /*
1155                  * if the newly added address does not relate routing
1156                  * information, we skip.
1157                  */
1158                 if (changed == 0)
1159                         continue;
1160                 /* Retransmit unacknowledged DATA chunks immediately */
1161                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1162                     SCTP_MOBILITY_FASTHANDOFF)) {
1163                         sctp_net_immediate_retrans(stcb, net);
1164                 }
1165                 /* Send SET PRIMARY for this new address */
1166                 if (net == stcb->asoc.primary_destination) {
1167                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1168                             SCTP_SET_PRIM_ADDR);
1169                 }
1170         }
1171 }
1172
1173 /*
1174  * process an ADD/DELETE IP ack from peer.
1175  * addr: corresponding sctp_ifa to the address being added/deleted.
1176  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1177  * flag: 1=success, 0=failure.
1178  */
1179 static void
1180 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1181 {
1182         /*
1183          * do the necessary asoc list work- if we get a failure indication,
1184          * leave the address on the assoc's restricted list.  If we get a
1185          * success indication, remove the address from the restricted list.
1186          */
1187         /*
1188          * Note: this will only occur for ADD_IP_ADDRESS, since
1189          * DEL_IP_ADDRESS is never actually added to the list...
1190          */
1191         if (flag) {
1192                 /* success case, so remove from the restricted list */
1193                 sctp_del_local_addr_restricted(stcb, addr);
1194
1195                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1196                     SCTP_MOBILITY_BASE) ||
1197                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1198                     SCTP_MOBILITY_FASTHANDOFF)) {
1199                         sctp_path_check_and_react(stcb, addr);
1200                         return;
1201                 }
1202                 /* clear any cached/topologically incorrect source addresses */
1203                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1204         }
1205         /* else, leave it on the list */
1206 }
1207
1208 /*
1209  * add an asconf add/delete/set primary IP address parameter to the queue.
1210  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1211  * returns 0 if queued, -1 if not queued/removed.
1212  * NOTE: if adding, but a delete for the same address is already scheduled
1213  * (and not yet sent out), simply remove it from queue.  Same for deleting
1214  * an address already scheduled for add.  If a duplicate operation is found,
1215  * ignore the new one.
1216  */
1217 static int
1218 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1219     uint16_t type)
1220 {
1221         struct sctp_asconf_addr *aa, *aa_next;
1222
1223         /* make sure the request isn't already in the queue */
1224         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1225                 /* address match? */
1226                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1227                         continue;
1228                 /*
1229                  * is the request already in queue but not sent? pass the
1230                  * request already sent in order to resolve the following
1231                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1232                  * can't remove the ADD request already sent 3. arrival of
1233                  * ADD
1234                  */
1235                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1236                         return (-1);
1237                 }
1238                 /* is the negative request already in queue, and not sent */
1239                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1240                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1241                         /* add requested, delete already queued */
1242                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1243                         /* remove the ifa from the restricted list */
1244                         sctp_del_local_addr_restricted(stcb, ifa);
1245                         /* free the asconf param */
1246                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1247                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1248                         return (-1);
1249                 }
1250                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1251                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1252                         /* delete requested, add already queued */
1253                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1254                         /* remove the aa->ifa from the restricted list */
1255                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1256                         /* free the asconf param */
1257                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1258                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1259                         return (-1);
1260                 }
1261         }                       /* for each aa */
1262
1263         /* adding new request to the queue */
1264         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1265             SCTP_M_ASC_ADDR);
1266         if (aa == NULL) {
1267                 /* didn't get memory */
1268                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1269                 return (-1);
1270         }
1271         aa->special_del = 0;
1272         /* fill in asconf address parameter fields */
1273         /* top level elements are "networked" during send */
1274         aa->ap.aph.ph.param_type = type;
1275         aa->ifa = ifa;
1276         atomic_add_int(&ifa->refcount, 1);
1277         /* correlation_id filled in during send routine later... */
1278         switch (ifa->address.sa.sa_family) {
1279 #ifdef INET6
1280         case AF_INET6:
1281                 {
1282                         struct sockaddr_in6 *sin6;
1283
1284                         sin6 = &ifa->address.sin6;
1285                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1286                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1287                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1288                             sizeof(struct sctp_ipv6addr_param);
1289                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1290                             sizeof(struct in6_addr));
1291                         break;
1292                 }
1293 #endif
1294 #ifdef INET
1295         case AF_INET:
1296                 {
1297                         struct sockaddr_in *sin;
1298
1299                         sin = &ifa->address.sin;
1300                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1301                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1302                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1303                             sizeof(struct sctp_ipv4addr_param);
1304                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1305                             sizeof(struct in_addr));
1306                         break;
1307                 }
1308 #endif
1309         default:
1310                 /* invalid family! */
1311                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1312                 sctp_free_ifa(ifa);
1313                 return (-1);
1314         }
1315         aa->sent = 0;           /* clear sent flag */
1316
1317         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1318 #ifdef SCTP_DEBUG
1319         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1320                 if (type == SCTP_ADD_IP_ADDRESS) {
1321                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1322                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1323                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1324                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1325                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1326                 } else {
1327                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1328                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1329                 }
1330         }
1331 #endif
1332
1333         return (0);
1334 }
1335
1336
1337 /*
1338  * add an asconf operation for the given ifa and type.
1339  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1340  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1341  * advisable.
1342  */
1343 static int
1344 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1345     uint16_t type)
1346 {
1347         uint32_t status;
1348         int pending_delete_queued = 0;
1349         int last;
1350
1351         /* see if peer supports ASCONF */
1352         if (stcb->asoc.asconf_supported == 0) {
1353                 return (-1);
1354         }
1355
1356         /*
1357          * if this is deleting the last address from the assoc, mark it as
1358          * pending.
1359          */
1360         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) {
1361                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1362                         last = (sctp_local_addr_count(stcb) == 0);
1363                 } else {
1364                         last = (sctp_local_addr_count(stcb) == 1);
1365                 }
1366                 if (last) {
1367                         /* set the pending delete info only */
1368                         stcb->asoc.asconf_del_pending = 1;
1369                         stcb->asoc.asconf_addr_del_pending = ifa;
1370                         atomic_add_int(&ifa->refcount, 1);
1371                         SCTPDBG(SCTP_DEBUG_ASCONF2,
1372                             "asconf_queue_add: mark delete last address pending\n");
1373                         return (-1);
1374                 }
1375         }
1376
1377         /* queue an asconf parameter */
1378         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1379
1380         /*
1381          * if this is an add, and there is a delete also pending (i.e. the
1382          * last local address is being changed), queue the pending delete
1383          * too.
1384          */
1385         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1386                 /* queue in the pending delete */
1387                 if (sctp_asconf_queue_mgmt(stcb,
1388                     stcb->asoc.asconf_addr_del_pending,
1389                     SCTP_DEL_IP_ADDRESS) == 0) {
1390                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n");
1391                         pending_delete_queued = 1;
1392                         /* clear out the pending delete info */
1393                         stcb->asoc.asconf_del_pending = 0;
1394                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1395                         stcb->asoc.asconf_addr_del_pending = NULL;
1396                 }
1397         }
1398
1399         if (pending_delete_queued) {
1400                 struct sctp_nets *net;
1401
1402                 /*
1403                  * since we know that the only/last address is now being
1404                  * changed in this case, reset the cwnd/rto on all nets to
1405                  * start as a new address and path.  Also clear the error
1406                  * counts to give the assoc the best chance to complete the
1407                  * address change.
1408                  */
1409                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1410                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1411                             net);
1412                         net->RTO = 0;
1413                         net->error_count = 0;
1414                 }
1415                 stcb->asoc.overall_error_count = 0;
1416                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1417                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1418                             stcb->asoc.overall_error_count,
1419                             0,
1420                             SCTP_FROM_SCTP_ASCONF,
1421                             __LINE__);
1422                 }
1423
1424                 /* queue in an advisory set primary too */
1425                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1426                 /* let caller know we should send this out immediately */
1427                 status = 1;
1428         }
1429         return (status);
1430 }
1431
1432 /*-
1433  * add an asconf delete IP address parameter to the queue by sockaddr and
1434  * possibly with no sctp_ifa available.  This is only called by the routine
1435  * that checks the addresses in an INIT-ACK against the current address list.
1436  * returns 0 if completed, non-zero if not completed.
1437  * NOTE: if an add is already scheduled (and not yet sent out), simply
1438  * remove it from queue.  If a duplicate operation is found, ignore the
1439  * new one.
1440  */
1441 static int
1442 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1443 {
1444         struct sctp_ifa *ifa;
1445         struct sctp_asconf_addr *aa, *aa_next;
1446
1447         if (stcb == NULL) {
1448                 return (-1);
1449         }
1450         /* see if peer supports ASCONF */
1451         if (stcb->asoc.asconf_supported == 0) {
1452                 return (-1);
1453         }
1454         /* make sure the request isn't already in the queue */
1455         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1456                 /* address match? */
1457                 if (sctp_asconf_addr_match(aa, sa) == 0)
1458                         continue;
1459                 /* is the request already in queue (sent or not) */
1460                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1461                         return (-1);
1462                 }
1463                 /* is the negative request already in queue, and not sent */
1464                 if (aa->sent == 1)
1465                         continue;
1466                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1467                         /* add already queued, so remove existing entry */
1468                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1469                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1470                         /* free the entry */
1471                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1472                         return (-1);
1473                 }
1474         }                       /* for each aa */
1475
1476         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1477         ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED);
1478
1479         /* adding new request to the queue */
1480         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1481             SCTP_M_ASC_ADDR);
1482         if (aa == NULL) {
1483                 /* didn't get memory */
1484                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1485                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1486                 return (-1);
1487         }
1488         aa->special_del = 0;
1489         /* fill in asconf address parameter fields */
1490         /* top level elements are "networked" during send */
1491         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1492         aa->ifa = ifa;
1493         if (ifa)
1494                 atomic_add_int(&ifa->refcount, 1);
1495         /* correlation_id filled in during send routine later... */
1496         switch (sa->sa_family) {
1497 #ifdef INET6
1498         case AF_INET6:
1499                 {
1500                         /* IPv6 address */
1501                         struct sockaddr_in6 *sin6;
1502
1503                         sin6 = (struct sockaddr_in6 *)sa;
1504                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1505                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1506                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1507                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1508                             sizeof(struct in6_addr));
1509                         break;
1510                 }
1511 #endif
1512 #ifdef INET
1513         case AF_INET:
1514                 {
1515                         /* IPv4 address */
1516                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1517
1518                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1519                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1520                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1521                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1522                             sizeof(struct in_addr));
1523                         break;
1524                 }
1525 #endif
1526         default:
1527                 /* invalid family! */
1528                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1529                 if (ifa)
1530                         sctp_free_ifa(ifa);
1531                 return (-1);
1532         }
1533         aa->sent = 0;           /* clear sent flag */
1534
1535         /* delete goes to the back of the queue */
1536         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1537
1538         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1539         return (0);
1540 }
1541
1542 /*
1543  * find a specific asconf param on our "sent" queue
1544  */
1545 static struct sctp_asconf_addr *
1546 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1547 {
1548         struct sctp_asconf_addr *aa;
1549
1550         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1551                 if (aa->ap.aph.correlation_id == correlation_id &&
1552                     aa->sent == 1) {
1553                         /* found it */
1554                         return (aa);
1555                 }
1556         }
1557         /* didn't find it */
1558         return (NULL);
1559 }
1560
1561 /*
1562  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1563  * notifications based on the error response
1564  */
1565 static void
1566 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED,
1567     struct sctp_asconf_paramhdr *aph)
1568 {
1569         struct sctp_error_cause *eh;
1570         struct sctp_paramhdr *ph;
1571         uint16_t param_type;
1572         uint16_t error_code;
1573
1574         eh = (struct sctp_error_cause *)(aph + 1);
1575         ph = (struct sctp_paramhdr *)(eh + 1);
1576         /* validate lengths */
1577         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1578             htons(aph->ph.param_length)) {
1579                 /* invalid error cause length */
1580                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1581                     "asconf_process_error: cause element too long\n");
1582                 return;
1583         }
1584         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1585             htons(eh->length)) {
1586                 /* invalid included TLV length */
1587                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1588                     "asconf_process_error: included TLV too long\n");
1589                 return;
1590         }
1591         /* which error code ? */
1592         error_code = ntohs(eh->code);
1593         param_type = ntohs(aph->ph.param_type);
1594         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1595         switch (error_code) {
1596         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1597                 /* we allow ourselves to "try again" for this error */
1598                 break;
1599         default:
1600                 /* peer can't handle it... */
1601                 switch (param_type) {
1602                 case SCTP_ADD_IP_ADDRESS:
1603                 case SCTP_DEL_IP_ADDRESS:
1604                 case SCTP_SET_PRIM_ADDR:
1605                         break;
1606                 default:
1607                         break;
1608                 }
1609         }
1610 }
1611
1612 /*
1613  * process an asconf queue param.
1614  * aparam: parameter to process, will be removed from the queue.
1615  * flag: 1=success case, 0=failure case
1616  */
1617 static void
1618 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1619     struct sctp_asconf_addr *aparam, uint32_t flag)
1620 {
1621         uint16_t param_type;
1622
1623         /* process this param */
1624         param_type = aparam->ap.aph.ph.param_type;
1625         switch (param_type) {
1626         case SCTP_ADD_IP_ADDRESS:
1627                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1628                     "process_param_ack: added IP address\n");
1629                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1630                 break;
1631         case SCTP_DEL_IP_ADDRESS:
1632                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1633                     "process_param_ack: deleted IP address\n");
1634                 /* nothing really to do... lists already updated */
1635                 break;
1636         case SCTP_SET_PRIM_ADDR:
1637                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1638                     "process_param_ack: set primary IP address\n");
1639                 /* nothing to do... peer may start using this addr */
1640                 break;
1641         default:
1642                 /* should NEVER happen */
1643                 break;
1644         }
1645
1646         /* remove the param and free it */
1647         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1648         if (aparam->ifa)
1649                 sctp_free_ifa(aparam->ifa);
1650         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1651 }
1652
1653 /*
1654  * cleanup from a bad asconf ack parameter
1655  */
1656 static void
1657 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED)
1658 {
1659         /* assume peer doesn't really know how to do asconfs */
1660         /* XXX we could free the pending queue here */
1661
1662 }
1663
1664 void
1665 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1666     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1667     struct sctp_nets *net, int *abort_no_unlock)
1668 {
1669         struct sctp_association *asoc;
1670         uint32_t serial_num;
1671         uint16_t ack_length;
1672         struct sctp_asconf_paramhdr *aph;
1673         struct sctp_asconf_addr *aa, *aa_next;
1674         uint32_t last_error_id = 0;     /* last error correlation id */
1675         uint32_t id;
1676         struct sctp_asconf_addr *ap;
1677
1678         /* asconf param buffer */
1679         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1680
1681         /* verify minimum length */
1682         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1683                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1684                     "handle_asconf_ack: chunk too small = %xh\n",
1685                     ntohs(cp->ch.chunk_length));
1686                 return;
1687         }
1688         asoc = &stcb->asoc;
1689         serial_num = ntohl(cp->serial_number);
1690
1691         /*
1692          * NOTE: we may want to handle this differently- currently, we will
1693          * abort when we get an ack for the expected serial number + 1 (eg.
1694          * we didn't send it), process an ack normally if it is the expected
1695          * serial number, and re-send the previous ack for *ALL* other
1696          * serial numbers
1697          */
1698
1699         /*
1700          * if the serial number is the next expected, but I didn't send it,
1701          * abort the asoc, since someone probably just hijacked us...
1702          */
1703         if (serial_num == (asoc->asconf_seq_out + 1)) {
1704                 struct mbuf *op_err;
1705                 char msg[SCTP_DIAG_INFO_LEN];
1706
1707                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1708                 SCTP_SNPRINTF(msg, sizeof(msg), "Never sent serial number %8.8x", serial_num);
1709                 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
1710                 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
1711                 *abort_no_unlock = 1;
1712                 return;
1713         }
1714         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1715                 /* got a duplicate/unexpected ASCONF-ACK */
1716                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1717                     serial_num, asoc->asconf_seq_out_acked + 1);
1718                 return;
1719         }
1720
1721         if (serial_num == asoc->asconf_seq_out - 1) {
1722                 /* stop our timer */
1723                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL,
1724                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5);
1725         }
1726
1727         /* process the ASCONF-ACK contents */
1728         ack_length = ntohs(cp->ch.chunk_length) -
1729             sizeof(struct sctp_asconf_ack_chunk);
1730         offset += sizeof(struct sctp_asconf_ack_chunk);
1731         /* process through all parameters */
1732         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1733                 unsigned int param_length, param_type;
1734
1735                 /* get pointer to next asconf parameter */
1736                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1737                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1738                 if (aph == NULL) {
1739                         /* can't get an asconf paramhdr */
1740                         sctp_asconf_ack_clear(stcb);
1741                         return;
1742                 }
1743                 param_type = ntohs(aph->ph.param_type);
1744                 param_length = ntohs(aph->ph.param_length);
1745                 if (param_length > ack_length) {
1746                         sctp_asconf_ack_clear(stcb);
1747                         return;
1748                 }
1749                 if (param_length < sizeof(struct sctp_paramhdr)) {
1750                         sctp_asconf_ack_clear(stcb);
1751                         return;
1752                 }
1753                 /* get the complete parameter... */
1754                 if (param_length > sizeof(aparam_buf)) {
1755                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1756                             "param length (%u) larger than buffer size!\n", param_length);
1757                         sctp_asconf_ack_clear(stcb);
1758                         return;
1759                 }
1760                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1761                 if (aph == NULL) {
1762                         sctp_asconf_ack_clear(stcb);
1763                         return;
1764                 }
1765                 /* correlation_id is transparent to peer, no ntohl needed */
1766                 id = aph->correlation_id;
1767
1768                 switch (param_type) {
1769                 case SCTP_ERROR_CAUSE_IND:
1770                         last_error_id = id;
1771                         /* find the corresponding asconf param in our queue */
1772                         ap = sctp_asconf_find_param(stcb, id);
1773                         if (ap == NULL) {
1774                                 /* hmm... can't find this in our queue! */
1775                                 break;
1776                         }
1777                         /* process the parameter, failed flag */
1778                         sctp_asconf_process_param_ack(stcb, ap, 0);
1779                         /* process the error response */
1780                         sctp_asconf_process_error(stcb, aph);
1781                         break;
1782                 case SCTP_SUCCESS_REPORT:
1783                         /* find the corresponding asconf param in our queue */
1784                         ap = sctp_asconf_find_param(stcb, id);
1785                         if (ap == NULL) {
1786                                 /* hmm... can't find this in our queue! */
1787                                 break;
1788                         }
1789                         /* process the parameter, success flag */
1790                         sctp_asconf_process_param_ack(stcb, ap, 1);
1791                         break;
1792                 default:
1793                         break;
1794                 }               /* switch */
1795
1796                 /* update remaining ASCONF-ACK message length to process */
1797                 if (ack_length > SCTP_SIZE32(param_length)) {
1798                         ack_length -= SCTP_SIZE32(param_length);
1799                 } else {
1800                         break;
1801                 }
1802                 offset += SCTP_SIZE32(param_length);
1803         }                       /* while */
1804
1805         /*
1806          * if there are any "sent" params still on the queue, these are
1807          * implicitly "success", or "failed" (if we got an error back) ...
1808          * so process these appropriately
1809          *
1810          * we assume that the correlation_id's are monotonically increasing
1811          * beginning from 1 and that we don't have *that* many outstanding
1812          * at any given time
1813          */
1814         if (last_error_id == 0)
1815                 last_error_id--;        /* set to "max" value */
1816         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1817                 if (aa->sent == 1) {
1818                         /*
1819                          * implicitly successful or failed if correlation_id
1820                          * < last_error_id, then success else, failure
1821                          */
1822                         if (aa->ap.aph.correlation_id < last_error_id)
1823                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1824                         else
1825                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1826                 } else {
1827                         /*
1828                          * since we always process in order (FIFO queue) if
1829                          * we reach one that hasn't been sent, the rest
1830                          * should not have been sent either. so, we're
1831                          * done...
1832                          */
1833                         break;
1834                 }
1835         }
1836
1837         /* update the next sequence number to use */
1838         asoc->asconf_seq_out_acked++;
1839         /* remove the old ASCONF on our outbound queue */
1840         sctp_toss_old_asconf(stcb);
1841         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1842 #ifdef SCTP_TIMER_BASED_ASCONF
1843                 /* we have more params, so restart our timer */
1844                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1845                     stcb, net);
1846 #else
1847                 /* we have more params, so send out more */
1848                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1849 #endif
1850         }
1851 }
1852
1853 #ifdef INET6
1854 static uint32_t
1855 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1856 {
1857         struct sockaddr_in6 *sin6, *net6;
1858         struct sctp_nets *net;
1859
1860         if (sa->sa_family != AF_INET6) {
1861                 /* wrong family */
1862                 return (0);
1863         }
1864         sin6 = (struct sockaddr_in6 *)sa;
1865         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1866                 /* not link local address */
1867                 return (0);
1868         }
1869         /* hunt through our destination nets list for this scope_id */
1870         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1871                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1872                     AF_INET6)
1873                         continue;
1874                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1875                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1876                         continue;
1877                 if (sctp_is_same_scope(sin6, net6)) {
1878                         /* found one */
1879                         return (1);
1880                 }
1881         }
1882         /* didn't find one */
1883         return (0);
1884 }
1885 #endif
1886
1887 /*
1888  * address management functions
1889  */
1890 static void
1891 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1892     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1893 {
1894         int status;
1895
1896         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1897             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1898                 /* subset bound, no ASCONF allowed case, so ignore */
1899                 return;
1900         }
1901         /*
1902          * note: we know this is not the subset bound, no ASCONF case eg.
1903          * this is boundall or subset bound w/ASCONF allowed
1904          */
1905
1906         /* first, make sure that the address is IPv4 or IPv6 and not jailed */
1907         switch (ifa->address.sa.sa_family) {
1908 #ifdef INET6
1909         case AF_INET6:
1910                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1911                     &ifa->address.sin6.sin6_addr) != 0) {
1912                         return;
1913                 }
1914                 break;
1915 #endif
1916 #ifdef INET
1917         case AF_INET:
1918                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1919                     &ifa->address.sin.sin_addr) != 0) {
1920                         return;
1921                 }
1922                 break;
1923 #endif
1924         default:
1925                 return;
1926         }
1927 #ifdef INET6
1928         /* make sure we're "allowed" to add this type of addr */
1929         if (ifa->address.sa.sa_family == AF_INET6) {
1930                 /* invalid if we're not a v6 endpoint */
1931                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1932                         return;
1933                 /* is the v6 addr really valid ? */
1934                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1935                         return;
1936                 }
1937         }
1938 #endif
1939         /* put this address on the "pending/do not use yet" list */
1940         sctp_add_local_addr_restricted(stcb, ifa);
1941         /*
1942          * check address scope if address is out of scope, don't queue
1943          * anything... note: this would leave the address on both inp and
1944          * asoc lists
1945          */
1946         switch (ifa->address.sa.sa_family) {
1947 #ifdef INET6
1948         case AF_INET6:
1949                 {
1950                         struct sockaddr_in6 *sin6;
1951
1952                         sin6 = &ifa->address.sin6;
1953                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1954                                 /* we skip unspecifed addresses */
1955                                 return;
1956                         }
1957                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1958                                 if (stcb->asoc.scope.local_scope == 0) {
1959                                         return;
1960                                 }
1961                                 /* is it the right link local scope? */
1962                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1963                                         return;
1964                                 }
1965                         }
1966                         if (stcb->asoc.scope.site_scope == 0 &&
1967                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1968                                 return;
1969                         }
1970                         break;
1971                 }
1972 #endif
1973 #ifdef INET
1974         case AF_INET:
1975                 {
1976                         struct sockaddr_in *sin;
1977
1978                         /* invalid if we are a v6 only endpoint */
1979                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1980                             SCTP_IPV6_V6ONLY(inp))
1981                                 return;
1982
1983                         sin = &ifa->address.sin;
1984                         if (sin->sin_addr.s_addr == 0) {
1985                                 /* we skip unspecifed addresses */
1986                                 return;
1987                         }
1988                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
1989                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1990                                 return;
1991                         }
1992                         break;
1993                 }
1994 #endif
1995         default:
1996                 /* else, not AF_INET or AF_INET6, so skip */
1997                 return;
1998         }
1999
2000         /* queue an asconf for this address add/delete */
2001         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
2002                 /* does the peer do asconf? */
2003                 if (stcb->asoc.asconf_supported) {
2004                         /* queue an asconf for this addr */
2005                         status = sctp_asconf_queue_add(stcb, ifa, type);
2006
2007                         /*
2008                          * if queued ok, and in the open state, send out the
2009                          * ASCONF.  If in the non-open state, these will be
2010                          * sent when the state goes open.
2011                          */
2012                         if (status == 0 &&
2013                             ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2014                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) {
2015 #ifdef SCTP_TIMER_BASED_ASCONF
2016                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
2017                                     stcb, stcb->asoc.primary_destination);
2018 #else
2019                                 sctp_send_asconf(stcb, NULL, addr_locked);
2020 #endif
2021                         }
2022                 }
2023         }
2024 }
2025
2026
2027 int
2028 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2029 {
2030         struct sctp_asconf_iterator *asc;
2031         struct sctp_ifa *ifa;
2032         struct sctp_laddr *l;
2033         int cnt_invalid = 0;
2034
2035         asc = (struct sctp_asconf_iterator *)ptr;
2036         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2037                 ifa = l->ifa;
2038                 switch (ifa->address.sa.sa_family) {
2039 #ifdef INET6
2040                 case AF_INET6:
2041                         /* invalid if we're not a v6 endpoint */
2042                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2043                                 cnt_invalid++;
2044                                 if (asc->cnt == cnt_invalid)
2045                                         return (1);
2046                         }
2047                         break;
2048 #endif
2049 #ifdef INET
2050                 case AF_INET:
2051                         {
2052                                 /* invalid if we are a v6 only endpoint */
2053                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2054                                     SCTP_IPV6_V6ONLY(inp)) {
2055                                         cnt_invalid++;
2056                                         if (asc->cnt == cnt_invalid)
2057                                                 return (1);
2058                                 }
2059                                 break;
2060                         }
2061 #endif
2062                 default:
2063                         /* invalid address family */
2064                         cnt_invalid++;
2065                         if (asc->cnt == cnt_invalid)
2066                                 return (1);
2067                 }
2068         }
2069         return (0);
2070 }
2071
2072 static int
2073 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2074 {
2075         struct sctp_ifa *ifa;
2076         struct sctp_asconf_iterator *asc;
2077         struct sctp_laddr *laddr, *nladdr, *l;
2078
2079         /* Only for specific case not bound all */
2080         asc = (struct sctp_asconf_iterator *)ptr;
2081         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2082                 ifa = l->ifa;
2083                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2084                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2085                             sctp_nxt_addr) {
2086                                 if (laddr->ifa == ifa) {
2087                                         laddr->action = 0;
2088                                         break;
2089                                 }
2090
2091                         }
2092                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2093                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2094                                 /* remove only after all guys are done */
2095                                 if (laddr->ifa == ifa) {
2096                                         sctp_del_local_addr_ep(inp, ifa);
2097                                 }
2098                         }
2099                 }
2100         }
2101         return (0);
2102 }
2103
2104 void
2105 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2106     void *ptr, uint32_t val SCTP_UNUSED)
2107 {
2108         struct sctp_asconf_iterator *asc;
2109         struct sctp_ifa *ifa;
2110         struct sctp_laddr *l;
2111         int cnt_invalid = 0;
2112         int type, status;
2113         int num_queued = 0;
2114
2115         asc = (struct sctp_asconf_iterator *)ptr;
2116         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2117                 ifa = l->ifa;
2118                 type = l->action;
2119
2120                 /* address's vrf_id must be the vrf_id of the assoc */
2121                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2122                         continue;
2123                 }
2124
2125                 /* Same checks again for assoc */
2126                 switch (ifa->address.sa.sa_family) {
2127 #ifdef INET6
2128                 case AF_INET6:
2129                         {
2130                                 /* invalid if we're not a v6 endpoint */
2131                                 struct sockaddr_in6 *sin6;
2132
2133                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2134                                         cnt_invalid++;
2135                                         if (asc->cnt == cnt_invalid)
2136                                                 return;
2137                                         else
2138                                                 continue;
2139                                 }
2140                                 sin6 = &ifa->address.sin6;
2141                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2142                                         /* we skip unspecifed addresses */
2143                                         continue;
2144                                 }
2145                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2146                                     &sin6->sin6_addr) != 0) {
2147                                         continue;
2148                                 }
2149                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2150                                         if (stcb->asoc.scope.local_scope == 0) {
2151                                                 continue;
2152                                         }
2153                                         /* is it the right link local scope? */
2154                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2155                                                 continue;
2156                                         }
2157                                 }
2158                                 break;
2159                         }
2160 #endif
2161 #ifdef INET
2162                 case AF_INET:
2163                         {
2164                                 /* invalid if we are a v6 only endpoint */
2165                                 struct sockaddr_in *sin;
2166
2167                                 /* invalid if we are a v6 only endpoint */
2168                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2169                                     SCTP_IPV6_V6ONLY(inp))
2170                                         continue;
2171
2172                                 sin = &ifa->address.sin;
2173                                 if (sin->sin_addr.s_addr == 0) {
2174                                         /* we skip unspecifed addresses */
2175                                         continue;
2176                                 }
2177                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2178                                     &sin->sin_addr) != 0) {
2179                                         continue;
2180                                 }
2181                                 if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2182                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2183                                         continue;
2184                                 }
2185                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2186                                     SCTP_IPV6_V6ONLY(inp)) {
2187                                         cnt_invalid++;
2188                                         if (asc->cnt == cnt_invalid)
2189                                                 return;
2190                                         else
2191                                                 continue;
2192                                 }
2193                                 break;
2194                         }
2195 #endif
2196                 default:
2197                         /* invalid address family */
2198                         cnt_invalid++;
2199                         if (asc->cnt == cnt_invalid)
2200                                 return;
2201                         else
2202                                 continue;
2203                         break;
2204                 }
2205
2206                 if (type == SCTP_ADD_IP_ADDRESS) {
2207                         /* prevent this address from being used as a source */
2208                         sctp_add_local_addr_restricted(stcb, ifa);
2209                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2210                         struct sctp_nets *net;
2211
2212                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2213                                 /* delete this address if cached */
2214                                 if (net->ro._s_addr == ifa) {
2215                                         sctp_free_ifa(net->ro._s_addr);
2216                                         net->ro._s_addr = NULL;
2217                                         net->src_addr_selected = 0;
2218                                         RO_NHFREE(&net->ro);
2219                                         /*
2220                                          * Now we deleted our src address,
2221                                          * should we not also now reset the
2222                                          * cwnd/rto to start as if its a new
2223                                          * address?
2224                                          */
2225                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2226                                         net->RTO = 0;
2227
2228                                 }
2229                         }
2230                 } else if (type == SCTP_SET_PRIM_ADDR) {
2231                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2232                                 /* must validate the ifa is in the ep */
2233                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2234                                         continue;
2235                                 }
2236                         } else {
2237                                 /* Need to check scopes for this guy */
2238                                 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2239                                         continue;
2240                                 }
2241                         }
2242                 }
2243                 /* queue an asconf for this address add/delete */
2244                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2245                     stcb->asoc.asconf_supported == 1) {
2246                         /* queue an asconf for this addr */
2247                         status = sctp_asconf_queue_add(stcb, ifa, type);
2248                         /*
2249                          * if queued ok, and in the open state, update the
2250                          * count of queued params.  If in the non-open
2251                          * state, these get sent when the assoc goes open.
2252                          */
2253                         if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2254                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2255                                 if (status >= 0) {
2256                                         num_queued++;
2257                                 }
2258                         }
2259                 }
2260         }
2261         /*
2262          * If we have queued params in the open state, send out an ASCONF.
2263          */
2264         if (num_queued > 0) {
2265                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2266         }
2267 }
2268
2269 void
2270 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2271 {
2272         struct sctp_asconf_iterator *asc;
2273         struct sctp_ifa *ifa;
2274         struct sctp_laddr *l, *nl;
2275
2276         asc = (struct sctp_asconf_iterator *)ptr;
2277         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2278                 ifa = l->ifa;
2279                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2280                         /* Clear the defer use flag */
2281                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2282                 }
2283                 sctp_free_ifa(ifa);
2284                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2285                 SCTP_DECR_LADDR_COUNT();
2286         }
2287         SCTP_FREE(asc, SCTP_M_ASC_IT);
2288 }
2289
2290 /*
2291  * sa is the sockaddr to ask the peer to set primary to.
2292  * returns: 0 = completed, -1 = error
2293  */
2294 int32_t
2295 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2296 {
2297         uint32_t vrf_id;
2298         struct sctp_ifa *ifa;
2299
2300         /* find the ifa for the desired set primary */
2301         vrf_id = stcb->asoc.vrf_id;
2302         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2303         if (ifa == NULL) {
2304                 /* Invalid address */
2305                 return (-1);
2306         }
2307
2308         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2309         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2310                 /* set primary queuing succeeded */
2311                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2312                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2313                     (void *)stcb);
2314                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2315                 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2316                     (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2317 #ifdef SCTP_TIMER_BASED_ASCONF
2318                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2319                             stcb->sctp_ep, stcb,
2320                             stcb->asoc.primary_destination);
2321 #else
2322                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2323 #endif
2324                 }
2325         } else {
2326                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2327                     (void *)stcb);
2328                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2329                 return (-1);
2330         }
2331         return (0);
2332 }
2333
2334 int
2335 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2336 {
2337         struct sctp_tmit_chunk *chk, *nchk;
2338         unsigned int offset, asconf_limit;
2339         struct sctp_asconf_chunk *acp;
2340         struct sctp_asconf_paramhdr *aph;
2341         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2342         struct sctp_paramhdr *ph;
2343         int add_cnt, del_cnt;
2344         uint16_t last_param_type;
2345
2346         add_cnt = del_cnt = 0;
2347         last_param_type = 0;
2348         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2349                 if (chk->data == NULL) {
2350                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2351                         continue;
2352                 }
2353                 offset = 0;
2354                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2355                 offset += sizeof(struct sctp_asconf_chunk);
2356                 asconf_limit = ntohs(acp->ch.chunk_length);
2357                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2358                 if (ph == NULL) {
2359                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2360                         continue;
2361                 }
2362                 offset += ntohs(ph->param_length);
2363
2364                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2365                 if (aph == NULL) {
2366                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2367                         continue;
2368                 }
2369                 while (aph != NULL) {
2370                         unsigned int param_length, param_type;
2371
2372                         param_type = ntohs(aph->ph.param_type);
2373                         param_length = ntohs(aph->ph.param_length);
2374                         if (offset + param_length > asconf_limit) {
2375                                 /* parameter goes beyond end of chunk! */
2376                                 break;
2377                         }
2378                         if (param_length > sizeof(aparam_buf)) {
2379                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2380                                 break;
2381                         }
2382                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2383                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2384                                 break;
2385                         }
2386
2387                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2388                         if (aph == NULL) {
2389                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2390                                 break;
2391                         }
2392
2393                         ph = (struct sctp_paramhdr *)(aph + 1);
2394                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2395                                 switch (param_type) {
2396                                 case SCTP_ADD_IP_ADDRESS:
2397                                         add_cnt++;
2398                                         break;
2399                                 case SCTP_DEL_IP_ADDRESS:
2400                                         del_cnt++;
2401                                         break;
2402                                 default:
2403                                         break;
2404                                 }
2405                                 last_param_type = param_type;
2406                         }
2407
2408                         offset += SCTP_SIZE32(param_length);
2409                         if (offset >= asconf_limit) {
2410                                 /* no more data in the mbuf chain */
2411                                 break;
2412                         }
2413                         /* get pointer to next asconf param */
2414                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2415                 }
2416         }
2417
2418         /*
2419          * we want to find the sequences which consist of ADD -> DEL -> ADD
2420          * or DEL -> ADD
2421          */
2422         if (add_cnt > del_cnt ||
2423             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2424                 return (1);
2425         }
2426         return (0);
2427 }
2428
2429 static struct sockaddr *
2430 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2431 {
2432         struct sctp_vrf *vrf = NULL;
2433         struct sctp_ifn *sctp_ifn;
2434         struct sctp_ifa *sctp_ifa;
2435
2436         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2437                 SCTP_IPI_ADDR_RLOCK();
2438         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2439         if (vrf == NULL) {
2440                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2441                         SCTP_IPI_ADDR_RUNLOCK();
2442                 return (NULL);
2443         }
2444         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2445                 if (stcb->asoc.scope.loopback_scope == 0 &&
2446                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2447                         /* Skip if loopback_scope not set */
2448                         continue;
2449                 }
2450                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2451                         switch (sctp_ifa->address.sa.sa_family) {
2452 #ifdef INET
2453                         case AF_INET:
2454                                 if (stcb->asoc.scope.ipv4_addr_legal) {
2455                                         struct sockaddr_in *sin;
2456
2457                                         sin = &sctp_ifa->address.sin;
2458                                         if (sin->sin_addr.s_addr == 0) {
2459                                                 /* skip unspecifed addresses */
2460                                                 continue;
2461                                         }
2462                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
2463                                             &sin->sin_addr) != 0) {
2464                                                 continue;
2465                                         }
2466                                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2467                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2468                                                 continue;
2469
2470                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2471                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2472                                                 continue;
2473                                         /*
2474                                          * found a valid local v4 address to
2475                                          * use
2476                                          */
2477                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2478                                                 SCTP_IPI_ADDR_RUNLOCK();
2479                                         return (&sctp_ifa->address.sa);
2480                                 }
2481                                 break;
2482 #endif
2483 #ifdef INET6
2484                         case AF_INET6:
2485                                 if (stcb->asoc.scope.ipv6_addr_legal) {
2486                                         struct sockaddr_in6 *sin6;
2487
2488                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2489                                                 continue;
2490                                         }
2491
2492                                         sin6 = &sctp_ifa->address.sin6;
2493                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2494                                                 /*
2495                                                  * we skip unspecifed
2496                                                  * addresses
2497                                                  */
2498                                                 continue;
2499                                         }
2500                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
2501                                             &sin6->sin6_addr) != 0) {
2502                                                 continue;
2503                                         }
2504                                         if (stcb->asoc.scope.local_scope == 0 &&
2505                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2506                                                 continue;
2507                                         if (stcb->asoc.scope.site_scope == 0 &&
2508                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2509                                                 continue;
2510
2511                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2512                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2513                                                 continue;
2514                                         /*
2515                                          * found a valid local v6 address to
2516                                          * use
2517                                          */
2518                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2519                                                 SCTP_IPI_ADDR_RUNLOCK();
2520                                         return (&sctp_ifa->address.sa);
2521                                 }
2522                                 break;
2523 #endif
2524                         default:
2525                                 break;
2526                         }
2527                 }
2528         }
2529         /* no valid addresses found */
2530         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2531                 SCTP_IPI_ADDR_RUNLOCK();
2532         return (NULL);
2533 }
2534
2535 static struct sockaddr *
2536 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2537 {
2538         struct sctp_laddr *laddr;
2539
2540         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2541                 if (laddr->ifa == NULL) {
2542                         continue;
2543                 }
2544                 /* is the address restricted ? */
2545                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2546                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2547                         continue;
2548
2549                 /* found a valid local address to use */
2550                 return (&laddr->ifa->address.sa);
2551         }
2552         /* no valid addresses found */
2553         return (NULL);
2554 }
2555
2556 /*
2557  * builds an ASCONF chunk from queued ASCONF params.
2558  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2559  */
2560 struct mbuf *
2561 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2562 {
2563         struct mbuf *m_asconf, *m_asconf_chk;
2564         struct sctp_asconf_addr *aa;
2565         struct sctp_asconf_chunk *acp;
2566         struct sctp_asconf_paramhdr *aph;
2567         struct sctp_asconf_addr_param *aap;
2568         uint32_t p_length;
2569         uint32_t correlation_id = 1;    /* 0 is reserved... */
2570         caddr_t ptr, lookup_ptr;
2571         uint8_t lookup_used = 0;
2572
2573         /* are there any asconf params to send? */
2574         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2575                 if (aa->sent == 0)
2576                         break;
2577         }
2578         if (aa == NULL)
2579                 return (NULL);
2580
2581         /*
2582          * get a chunk header mbuf and a cluster for the asconf params since
2583          * it's simpler to fill in the asconf chunk header lookup address on
2584          * the fly
2585          */
2586         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA);
2587         if (m_asconf_chk == NULL) {
2588                 /* no mbuf's */
2589                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2590                     "sctp_compose_asconf: couldn't get chunk mbuf!\n");
2591                 return (NULL);
2592         }
2593         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
2594         if (m_asconf == NULL) {
2595                 /* no mbuf's */
2596                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2597                     "sctp_compose_asconf: couldn't get mbuf!\n");
2598                 sctp_m_freem(m_asconf_chk);
2599                 return (NULL);
2600         }
2601         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2602         SCTP_BUF_LEN(m_asconf) = 0;
2603         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2604         memset(acp, 0, sizeof(struct sctp_asconf_chunk));
2605         /* save pointers to lookup address and asconf params */
2606         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2607         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2608
2609         /* fill in chunk header info */
2610         acp->ch.chunk_type = SCTP_ASCONF;
2611         acp->ch.chunk_flags = 0;
2612         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2613         stcb->asoc.asconf_seq_out++;
2614
2615         /* add parameters... up to smallest MTU allowed */
2616         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2617                 if (aa->sent)
2618                         continue;
2619                 /* get the parameter length */
2620                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2621                 /* will it fit in current chunk? */
2622                 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) ||
2623                     (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) {
2624                         /* won't fit, so we're done with this chunk */
2625                         break;
2626                 }
2627                 /* assign (and store) a correlation id */
2628                 aa->ap.aph.correlation_id = correlation_id++;
2629
2630                 /*
2631                  * fill in address if we're doing a delete this is a simple
2632                  * way for us to fill in the correlation address, which
2633                  * should only be used by the peer if we're deleting our
2634                  * source address and adding a new address (e.g. renumbering
2635                  * case)
2636                  */
2637                 if (lookup_used == 0 &&
2638                     (aa->special_del == 0) &&
2639                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2640                         struct sctp_ipv6addr_param *lookup;
2641                         uint16_t p_size, addr_size;
2642
2643                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2644                         lookup->ph.param_type =
2645                             htons(aa->ap.addrp.ph.param_type);
2646                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2647                                 /* copy IPv6 address */
2648                                 p_size = sizeof(struct sctp_ipv6addr_param);
2649                                 addr_size = sizeof(struct in6_addr);
2650                         } else {
2651                                 /* copy IPv4 address */
2652                                 p_size = sizeof(struct sctp_ipv4addr_param);
2653                                 addr_size = sizeof(struct in_addr);
2654                         }
2655                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2656                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2657                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2658                         lookup_used = 1;
2659                 }
2660                 /* copy into current space */
2661                 memcpy(ptr, &aa->ap, p_length);
2662
2663                 /* network elements and update lengths */
2664                 aph = (struct sctp_asconf_paramhdr *)ptr;
2665                 aap = (struct sctp_asconf_addr_param *)ptr;
2666                 /* correlation_id is transparent to peer, no htonl needed */
2667                 aph->ph.param_type = htons(aph->ph.param_type);
2668                 aph->ph.param_length = htons(aph->ph.param_length);
2669                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2670                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2671
2672                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2673                 ptr += SCTP_SIZE32(p_length);
2674
2675                 /*
2676                  * these params are removed off the pending list upon
2677                  * getting an ASCONF-ACK back from the peer, just set flag
2678                  */
2679                 aa->sent = 1;
2680         }
2681         /* check to see if the lookup addr has been populated yet */
2682         if (lookup_used == 0) {
2683                 /* NOTE: if the address param is optional, can skip this... */
2684                 /* add any valid (existing) address... */
2685                 struct sctp_ipv6addr_param *lookup;
2686                 uint16_t p_size, addr_size;
2687                 struct sockaddr *found_addr;
2688                 caddr_t addr_ptr;
2689
2690                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2691                         found_addr = sctp_find_valid_localaddr(stcb,
2692                             addr_locked);
2693                 else
2694                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2695
2696                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2697                 if (found_addr != NULL) {
2698                         switch (found_addr->sa_family) {
2699 #ifdef INET6
2700                         case AF_INET6:
2701                                 /* copy IPv6 address */
2702                                 lookup->ph.param_type =
2703                                     htons(SCTP_IPV6_ADDRESS);
2704                                 p_size = sizeof(struct sctp_ipv6addr_param);
2705                                 addr_size = sizeof(struct in6_addr);
2706                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2707                                     found_addr)->sin6_addr;
2708                                 break;
2709 #endif
2710 #ifdef INET
2711                         case AF_INET:
2712                                 /* copy IPv4 address */
2713                                 lookup->ph.param_type =
2714                                     htons(SCTP_IPV4_ADDRESS);
2715                                 p_size = sizeof(struct sctp_ipv4addr_param);
2716                                 addr_size = sizeof(struct in_addr);
2717                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2718                                     found_addr)->sin_addr;
2719                                 break;
2720 #endif
2721                         default:
2722                                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2723                                     "sctp_compose_asconf: no usable lookup addr (family = %d)!\n",
2724                                     found_addr->sa_family);
2725                                 sctp_m_freem(m_asconf_chk);
2726                                 sctp_m_freem(m_asconf);
2727                                 return (NULL);
2728                         }
2729                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2730                         memcpy(lookup->addr, addr_ptr, addr_size);
2731                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2732                 } else {
2733                         /* uh oh... don't have any address?? */
2734                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2735                             "sctp_compose_asconf: no lookup addr!\n");
2736                         sctp_m_freem(m_asconf_chk);
2737                         sctp_m_freem(m_asconf);
2738                         return (NULL);
2739                 }
2740         }
2741         /* chain it all together */
2742         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2743         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2744         acp->ch.chunk_length = htons(*retlen);
2745
2746         return (m_asconf_chk);
2747 }
2748
2749 /*
2750  * section to handle address changes before an association is up eg. changes
2751  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2752  */
2753
2754 /*
2755  * processes the (local) addresses in the INIT-ACK chunk
2756  */
2757 static void
2758 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2759     unsigned int offset, unsigned int length)
2760 {
2761         struct sctp_paramhdr tmp_param, *ph;
2762         uint16_t plen, ptype;
2763         struct sctp_ifa *sctp_ifa;
2764         union sctp_sockstore store;
2765 #ifdef INET6
2766         struct sctp_ipv6addr_param addr6_store;
2767 #endif
2768 #ifdef INET
2769         struct sctp_ipv4addr_param addr4_store;
2770 #endif
2771
2772         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2773         if (stcb == NULL)       /* Un-needed check for SA */
2774                 return;
2775
2776         /* convert to upper bound */
2777         length += offset;
2778
2779         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2780                 return;
2781         }
2782         /* go through the addresses in the init-ack */
2783         ph = (struct sctp_paramhdr *)
2784             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2785             (uint8_t *)&tmp_param);
2786         while (ph != NULL) {
2787                 ptype = ntohs(ph->param_type);
2788                 plen = ntohs(ph->param_length);
2789                 switch (ptype) {
2790 #ifdef INET6
2791                 case SCTP_IPV6_ADDRESS:
2792                         {
2793                                 struct sctp_ipv6addr_param *a6p;
2794
2795                                 /* get the entire IPv6 address param */
2796                                 a6p = (struct sctp_ipv6addr_param *)
2797                                     sctp_m_getptr(m, offset,
2798                                     sizeof(struct sctp_ipv6addr_param),
2799                                     (uint8_t *)&addr6_store);
2800                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2801                                     a6p == NULL) {
2802                                         return;
2803                                 }
2804                                 memset(&store, 0, sizeof(union sctp_sockstore));
2805                                 store.sin6.sin6_family = AF_INET6;
2806                                 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2807                                 store.sin6.sin6_port = stcb->rport;
2808                                 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr));
2809                                 break;
2810                         }
2811 #endif
2812 #ifdef INET
2813                 case SCTP_IPV4_ADDRESS:
2814                         {
2815                                 struct sctp_ipv4addr_param *a4p;
2816
2817                                 /* get the entire IPv4 address param */
2818                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2819                                     sizeof(struct sctp_ipv4addr_param),
2820                                     (uint8_t *)&addr4_store);
2821                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2822                                     a4p == NULL) {
2823                                         return;
2824                                 }
2825                                 memset(&store, 0, sizeof(union sctp_sockstore));
2826                                 store.sin.sin_family = AF_INET;
2827                                 store.sin.sin_len = sizeof(struct sockaddr_in);
2828                                 store.sin.sin_port = stcb->rport;
2829                                 store.sin.sin_addr.s_addr = a4p->addr;
2830                                 break;
2831                         }
2832 #endif
2833                 default:
2834                         goto next_addr;
2835                 }
2836
2837                 /* see if this address really (still) exists */
2838                 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id,
2839                     SCTP_ADDR_NOT_LOCKED);
2840                 if (sctp_ifa == NULL) {
2841                         /* address doesn't exist anymore */
2842                         int status;
2843
2844                         /* are ASCONFs allowed ? */
2845                         if ((sctp_is_feature_on(stcb->sctp_ep,
2846                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2847                             stcb->asoc.asconf_supported) {
2848                                 /* queue an ASCONF DEL_IP_ADDRESS */
2849                                 status = sctp_asconf_queue_sa_delete(stcb, &store.sa);
2850                                 /*
2851                                  * if queued ok, and in correct state, send
2852                                  * out the ASCONF.
2853                                  */
2854                                 if (status == 0 &&
2855                                     SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
2856 #ifdef SCTP_TIMER_BASED_ASCONF
2857                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2858                                             stcb->sctp_ep, stcb,
2859                                             stcb->asoc.primary_destination);
2860 #else
2861                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2862 #endif
2863                                 }
2864                         }
2865                 }
2866
2867 next_addr:
2868                 /*
2869                  * Sanity check:  Make sure the length isn't 0, otherwise
2870                  * we'll be stuck in this loop for a long time...
2871                  */
2872                 if (SCTP_SIZE32(plen) == 0) {
2873                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2874                             plen, ptype);
2875                         return;
2876                 }
2877                 /* get next parameter */
2878                 offset += SCTP_SIZE32(plen);
2879                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2880                         return;
2881                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2882                     sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2883         }                       /* while */
2884 }
2885
2886 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2887 /*
2888  * checks to see if a specific address is in the initack address list returns
2889  * 1 if found, 0 if not
2890  */
2891 static uint32_t
2892 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
2893 {
2894         struct sctp_paramhdr tmp_param, *ph;
2895         uint16_t plen, ptype;
2896 #ifdef INET
2897         struct sockaddr_in *sin;
2898         struct sctp_ipv4addr_param *a4p;
2899         struct sctp_ipv6addr_param addr4_store;
2900 #endif
2901 #ifdef INET6
2902         struct sockaddr_in6 *sin6;
2903         struct sctp_ipv6addr_param *a6p;
2904         struct sctp_ipv6addr_param addr6_store;
2905         struct sockaddr_in6 sin6_tmp;
2906 #endif
2907
2908         switch (sa->sa_family) {
2909 #ifdef INET
2910         case AF_INET:
2911                 break;
2912 #endif
2913 #ifdef INET6
2914         case AF_INET6:
2915                 break;
2916 #endif
2917         default:
2918                 return (0);
2919         }
2920
2921         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2922         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2923         /* convert to upper bound */
2924         length += offset;
2925
2926         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2927                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2928                     "find_initack_addr: invalid offset?\n");
2929                 return (0);
2930         }
2931         /* go through the addresses in the init-ack */
2932         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2933             sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2934         while (ph != NULL) {
2935                 ptype = ntohs(ph->param_type);
2936                 plen = ntohs(ph->param_length);
2937                 switch (ptype) {
2938 #ifdef INET6
2939                 case SCTP_IPV6_ADDRESS:
2940                         if (sa->sa_family == AF_INET6) {
2941                                 /* get the entire IPv6 address param */
2942                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
2943                                         break;
2944                                 }
2945                                 /* get the entire IPv6 address param */
2946                                 a6p = (struct sctp_ipv6addr_param *)
2947                                     sctp_m_getptr(m, offset,
2948                                     sizeof(struct sctp_ipv6addr_param),
2949                                     (uint8_t *)&addr6_store);
2950                                 if (a6p == NULL) {
2951                                         return (0);
2952                                 }
2953                                 sin6 = (struct sockaddr_in6 *)sa;
2954                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2955                                         /* create a copy and clear scope */
2956                                         memcpy(&sin6_tmp, sin6,
2957                                             sizeof(struct sockaddr_in6));
2958                                         sin6 = &sin6_tmp;
2959                                         in6_clearscope(&sin6->sin6_addr);
2960                                 }
2961                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
2962                                     sizeof(struct in6_addr)) == 0) {
2963                                         /* found it */
2964                                         return (1);
2965                                 }
2966                         }
2967                         break;
2968 #endif                          /* INET6 */
2969 #ifdef INET
2970                 case SCTP_IPV4_ADDRESS:
2971                         if (sa->sa_family == AF_INET) {
2972                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
2973                                         break;
2974                                 }
2975                                 /* get the entire IPv4 address param */
2976                                 a4p = (struct sctp_ipv4addr_param *)
2977                                     sctp_m_getptr(m, offset,
2978                                     sizeof(struct sctp_ipv4addr_param),
2979                                     (uint8_t *)&addr4_store);
2980                                 if (a4p == NULL) {
2981                                         return (0);
2982                                 }
2983                                 sin = (struct sockaddr_in *)sa;
2984                                 if (sin->sin_addr.s_addr == a4p->addr) {
2985                                         /* found it */
2986                                         return (1);
2987                                 }
2988                         }
2989                         break;
2990 #endif
2991                 default:
2992                         break;
2993                 }
2994                 /* get next parameter */
2995                 offset += SCTP_SIZE32(plen);
2996                 if (offset + sizeof(struct sctp_paramhdr) > length) {
2997                         return (0);
2998                 }
2999                 ph = (struct sctp_paramhdr *)
3000                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
3001                     (uint8_t *)&tmp_param);
3002         }                       /* while */
3003         /* not found! */
3004         return (0);
3005 }
3006
3007 /*
3008  * makes sure that the current endpoint local addr list is consistent with
3009  * the new association (eg. subset bound, asconf allowed) adds addresses as
3010  * necessary
3011  */
3012 static void
3013 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3014     int length, struct sockaddr *init_addr)
3015 {
3016         struct sctp_laddr *laddr;
3017
3018         /* go through the endpoint list */
3019         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3020                 /* be paranoid and validate the laddr */
3021                 if (laddr->ifa == NULL) {
3022                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3023                             "check_addr_list_ep: laddr->ifa is NULL");
3024                         continue;
3025                 }
3026                 /* do i have it implicitly? */
3027                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3028                         continue;
3029                 }
3030                 /* check to see if in the init-ack */
3031                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3032                         /* try to add it */
3033                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3034                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3035                 }
3036         }
3037 }
3038
3039 /*
3040  * makes sure that the current kernel address list is consistent with the new
3041  * association (with all addrs bound) adds addresses as necessary
3042  */
3043 static void
3044 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3045     int length, struct sockaddr *init_addr,
3046     uint16_t local_scope, uint16_t site_scope,
3047     uint16_t ipv4_scope, uint16_t loopback_scope)
3048 {
3049         struct sctp_vrf *vrf = NULL;
3050         struct sctp_ifn *sctp_ifn;
3051         struct sctp_ifa *sctp_ifa;
3052         uint32_t vrf_id;
3053 #ifdef INET
3054         struct sockaddr_in *sin;
3055 #endif
3056 #ifdef INET6
3057         struct sockaddr_in6 *sin6;
3058 #endif
3059
3060         if (stcb) {
3061                 vrf_id = stcb->asoc.vrf_id;
3062         } else {
3063                 return;
3064         }
3065         SCTP_IPI_ADDR_RLOCK();
3066         vrf = sctp_find_vrf(vrf_id);
3067         if (vrf == NULL) {
3068                 SCTP_IPI_ADDR_RUNLOCK();
3069                 return;
3070         }
3071         /* go through all our known interfaces */
3072         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3073                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3074                         /* skip loopback interface */
3075                         continue;
3076                 }
3077                 /* go through each interface address */
3078                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3079                         /* do i have it implicitly? */
3080                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3081                                 continue;
3082                         }
3083                         switch (sctp_ifa->address.sa.sa_family) {
3084 #ifdef INET
3085                         case AF_INET:
3086                                 sin = &sctp_ifa->address.sin;
3087                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3088                                     &sin->sin_addr) != 0) {
3089                                         continue;
3090                                 }
3091                                 if ((ipv4_scope == 0) &&
3092                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3093                                         /* private address not in scope */
3094                                         continue;
3095                                 }
3096                                 break;
3097 #endif
3098 #ifdef INET6
3099                         case AF_INET6:
3100                                 sin6 = &sctp_ifa->address.sin6;
3101                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3102                                     &sin6->sin6_addr) != 0) {
3103                                         continue;
3104                                 }
3105                                 if ((local_scope == 0) &&
3106                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3107                                         continue;
3108                                 }
3109                                 if ((site_scope == 0) &&
3110                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3111                                         continue;
3112                                 }
3113                                 break;
3114 #endif
3115                         default:
3116                                 break;
3117                         }
3118                         /* check to see if in the init-ack */
3119                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3120                                 /* try to add it */
3121                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3122                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3123                                     SCTP_ADDR_LOCKED);
3124                         }
3125                 }               /* end foreach ifa */
3126         }                       /* end foreach ifn */
3127         SCTP_IPI_ADDR_RUNLOCK();
3128 }
3129
3130 /*
3131  * validates an init-ack chunk (from a cookie-echo) with current addresses
3132  * adds addresses from the init-ack into our local address list, if needed
3133  * queues asconf adds/deletes addresses as needed and makes appropriate list
3134  * changes for source address selection m, offset: points to the start of the
3135  * address list in an init-ack chunk length: total length of the address
3136  * params only init_addr: address where my INIT-ACK was sent from
3137  */
3138 void
3139 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3140     int length, struct sockaddr *init_addr,
3141     uint16_t local_scope, uint16_t site_scope,
3142     uint16_t ipv4_scope, uint16_t loopback_scope)
3143 {
3144         /* process the local addresses in the initack */
3145         sctp_process_initack_addresses(stcb, m, offset, length);
3146
3147         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3148                 /* bound all case */
3149                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3150                     local_scope, site_scope, ipv4_scope, loopback_scope);
3151         } else {
3152                 /* subset bound case */
3153                 if (sctp_is_feature_on(stcb->sctp_ep,
3154                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3155                         /* asconf's allowed */
3156                         sctp_check_address_list_ep(stcb, m, offset, length,
3157                             init_addr);
3158                 }
3159                 /* else, no asconfs allowed, so what we sent is what we get */
3160         }
3161 }
3162
3163 /*
3164  * sctp_bindx() support
3165  */
3166 uint32_t
3167 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3168     uint32_t type, uint32_t vrf_id)
3169 {
3170         struct sctp_ifa *ifa;
3171         struct sctp_laddr *laddr, *nladdr;
3172
3173         if (sa->sa_len == 0) {
3174                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3175                 return (EINVAL);
3176         }
3177         if (type == SCTP_ADD_IP_ADDRESS) {
3178                 /* For an add the address MUST be on the system */
3179                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3180         } else if (type == SCTP_DEL_IP_ADDRESS) {
3181                 /* For a delete we need to find it in the inp */
3182                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3183         } else {
3184                 ifa = NULL;
3185         }
3186         if (ifa != NULL) {
3187                 if (type == SCTP_ADD_IP_ADDRESS) {
3188                         sctp_add_local_addr_ep(inp, ifa, type);
3189                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3190                         if (inp->laddr_count < 2) {
3191                                 /* can't delete the last local address */
3192                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3193                                 return (EINVAL);
3194                         }
3195                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3196                             sctp_nxt_addr) {
3197                                 if (ifa == laddr->ifa) {
3198                                         /* Mark in the delete */
3199                                         laddr->action = type;
3200                                 }
3201                         }
3202                 }
3203                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3204                         /*
3205                          * There is no need to start the iterator if the inp
3206                          * has no associations.
3207                          */
3208                         if (type == SCTP_DEL_IP_ADDRESS) {
3209                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3210                                         if (laddr->ifa == ifa) {
3211                                                 sctp_del_local_addr_ep(inp, ifa);
3212                                         }
3213                                 }
3214                         }
3215                 } else {
3216                         struct sctp_asconf_iterator *asc;
3217                         struct sctp_laddr *wi;
3218                         int ret;
3219
3220                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3221                             sizeof(struct sctp_asconf_iterator),
3222                             SCTP_M_ASC_IT);
3223                         if (asc == NULL) {
3224                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3225                                 return (ENOMEM);
3226                         }
3227                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3228                         if (wi == NULL) {
3229                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3230                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3231                                 return (ENOMEM);
3232                         }
3233                         LIST_INIT(&asc->list_of_work);
3234                         asc->cnt = 1;
3235                         SCTP_INCR_LADDR_COUNT();
3236                         wi->ifa = ifa;
3237                         wi->action = type;
3238                         atomic_add_int(&ifa->refcount, 1);
3239                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3240                         ret = sctp_initiate_iterator(sctp_asconf_iterator_ep,
3241                             sctp_asconf_iterator_stcb,
3242                             sctp_asconf_iterator_ep_end,
3243                             SCTP_PCB_ANY_FLAGS,
3244                             SCTP_PCB_ANY_FEATURES,
3245                             SCTP_ASOC_ANY_STATE,
3246                             (void *)asc, 0,
3247                             sctp_asconf_iterator_end, inp, 0);
3248                         if (ret) {
3249                                 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n");
3250                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT);
3251                                 sctp_asconf_iterator_end(asc, 0);
3252                                 return (EFAULT);
3253                         }
3254                 }
3255                 return (0);
3256         } else {
3257                 /* invalid address! */
3258                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3259                 return (EADDRNOTAVAIL);
3260         }
3261 }
3262
3263 void
3264 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, struct sctp_nets *net)
3265 {
3266         struct sctp_asconf_addr *aa_vtag, *aa_add, *aa_del;
3267         struct sctp_ifa *sctp_ifap;
3268         struct sctp_asconf_tag_param *vtag;
3269 #ifdef INET
3270         struct sockaddr_in *to;
3271 #endif
3272 #ifdef INET6
3273         struct sockaddr_in6 *to6;
3274 #endif
3275
3276         if (net == NULL) {
3277                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3278                 return;
3279         }
3280         if (stcb == NULL) {
3281                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3282                 return;
3283         }
3284         /*
3285          * Need to have in the ASCONF: - VTAG(my_vtag/peer_vtag) -
3286          * ADD(wildcard) - DEL(wildcard) - ADD(Any global addresses)
3287          */
3288         SCTP_MALLOC(aa_vtag, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR);
3289         SCTP_MALLOC(aa_add, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR);
3290         SCTP_MALLOC(aa_del, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR);
3291
3292         if ((aa_vtag == NULL) || (aa_add == NULL) || (aa_del == NULL)) {
3293                 /* Didn't get memory */
3294                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3295 out:
3296                 if (aa_vtag != NULL) {
3297                         SCTP_FREE(aa_vtag, SCTP_M_ASC_ADDR);
3298                 }
3299                 if (aa_add != NULL) {
3300                         SCTP_FREE(aa_add, SCTP_M_ASC_ADDR);
3301                 }
3302                 if (aa_del != NULL) {
3303                         SCTP_FREE(aa_del, SCTP_M_ASC_ADDR);
3304                 }
3305                 return;
3306         }
3307         memset(aa_vtag, 0, sizeof(struct sctp_asconf_addr));
3308         aa_vtag->special_del = 0;
3309         /* Fill in ASCONF address parameter fields. */
3310         /* Top level elements are "networked" during send. */
3311         aa_vtag->ifa = NULL;
3312         aa_vtag->sent = 0;      /* clear sent flag */
3313         vtag = (struct sctp_asconf_tag_param *)&aa_vtag->ap.aph;
3314         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3315         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3316         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3317         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3318
3319         memset(aa_add, 0, sizeof(struct sctp_asconf_addr));
3320         memset(aa_del, 0, sizeof(struct sctp_asconf_addr));
3321         switch (net->ro._l_addr.sa.sa_family) {
3322 #ifdef INET
3323         case AF_INET:
3324                 aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3325                 aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3326                 aa_add->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3327                 aa_add->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3328                 /* No need to fill the address, we are using 0.0.0.0 */
3329                 aa_del->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3330                 aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3331                 aa_del->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3332                 aa_del->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3333                 /* No need to fill the address, we are using 0.0.0.0 */
3334                 break;
3335 #endif
3336 #ifdef INET6
3337         case AF_INET6:
3338                 aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3339                 aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3340                 aa_add->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3341                 aa_add->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3342                 /* No need to fill the address, we are using ::0 */
3343                 aa_del->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3344                 aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3345                 aa_del->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3346                 aa_del->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3347                 /* No need to fill the address, we are using ::0 */
3348                 break;
3349 #endif
3350         default:
3351                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3352                     "sctp_asconf_send_nat_state_update: unknown address family %d\n",
3353                     net->ro._l_addr.sa.sa_family);
3354                 goto out;
3355         }
3356         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_vtag, next);
3357         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_add, next);
3358         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_del, next);
3359
3360         /* Now we must hunt the addresses and add all global addresses */
3361         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3362                 struct sctp_vrf *vrf = NULL;
3363                 struct sctp_ifn *sctp_ifnp;
3364                 uint32_t vrf_id;
3365
3366                 vrf_id = stcb->sctp_ep->def_vrf_id;
3367                 vrf = sctp_find_vrf(vrf_id);
3368                 if (vrf == NULL) {
3369                         goto skip_rest;
3370                 }
3371
3372                 SCTP_IPI_ADDR_RLOCK();
3373                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3374                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3375                                 switch (sctp_ifap->address.sa.sa_family) {
3376 #ifdef INET
3377                                 case AF_INET:
3378                                         to = &sctp_ifap->address.sin;
3379                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3380                                             &to->sin_addr) != 0) {
3381                                                 continue;
3382                                         }
3383                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3384                                                 continue;
3385                                         }
3386                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3387                                                 continue;
3388                                         }
3389                                         break;
3390 #endif
3391 #ifdef INET6
3392                                 case AF_INET6:
3393                                         to6 = &sctp_ifap->address.sin6;
3394                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3395                                             &to6->sin6_addr) != 0) {
3396                                                 continue;
3397                                         }
3398                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3399                                                 continue;
3400                                         }
3401                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3402                                                 continue;
3403                                         }
3404                                         break;
3405 #endif
3406                                 default:
3407                                         continue;
3408                                 }
3409                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3410                         }
3411                 }
3412                 SCTP_IPI_ADDR_RUNLOCK();
3413         } else {
3414                 struct sctp_laddr *laddr;
3415
3416                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3417                         if (laddr->ifa == NULL) {
3418                                 continue;
3419                         }
3420                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3421                                 /*
3422                                  * Address being deleted by the system, dont
3423                                  * list.
3424                                  */
3425                                 continue;
3426                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3427                                 /*
3428                                  * Address being deleted on this ep don't
3429                                  * list.
3430                                  */
3431                                 continue;
3432                         }
3433                         sctp_ifap = laddr->ifa;
3434                         switch (sctp_ifap->address.sa.sa_family) {
3435 #ifdef INET
3436                         case AF_INET:
3437                                 to = &sctp_ifap->address.sin;
3438                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3439                                         continue;
3440                                 }
3441                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3442                                         continue;
3443                                 }
3444                                 break;
3445 #endif
3446 #ifdef INET6
3447                         case AF_INET6:
3448                                 to6 = &sctp_ifap->address.sin6;
3449                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3450                                         continue;
3451                                 }
3452                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3453                                         continue;
3454                                 }
3455                                 break;
3456 #endif
3457                         default:
3458                                 continue;
3459                         }
3460                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3461                 }
3462         }
3463 skip_rest:
3464         /* Now we must send the asconf into the queue */
3465         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3466 }