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 /*
  56  * RFC 5061
  57  *
  58  * An ASCONF parameter queue exists per asoc which holds the pending address
  59  * operations.  Lists are updated upon receipt of ASCONF-ACK.
  60  *
  61  * A restricted_addrs list exists per assoc to hold local addresses that are
  62  * not (yet) usable by the assoc as a source address.  These addresses are
  63  * either pending an ASCONF operation (and exist on the ASCONF parameter
  64  * queue), or they are permanently restricted (the peer has returned an
  65  * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
  66  *
  67  * Deleted addresses are always immediately removed from the lists as they will
  68  * (shortly) no longer exist in the kernel.  We send ASCONFs as a courtesy,
  69  * only if allowed.
  70  */
  71
  72 /*
  73  * ASCONF parameter processing.
  74  * response_required: set if a reply is required (eg. SUCCESS_REPORT).
  75  * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
  76  * FIX: allocating this many mbufs on the fly is pretty inefficient...
  77  */
  78 static struct mbuf *
  79 sctp_asconf_success_response(uint32_t id)
  80 {
  81         struct mbuf *m_reply = NULL;
  82         struct sctp_asconf_paramhdr *aph;
  83
  84         m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
  85             0, M_NOWAIT, 1, MT_DATA);
  86         if (m_reply == NULL) {
  87                 SCTPDBG(SCTP_DEBUG_ASCONF1,
  88                     "asconf_success_response: couldn't get mbuf!\n");
  89                 return (NULL);
  90         }
  91         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
  92         aph->correlation_id = id;
  93         aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
  94         aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
  95         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
  96         aph->ph.param_length = htons(aph->ph.param_length);
  97
  98         return (m_reply);
  99 }
 100
 101 static struct mbuf *
 102 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv,
 103     uint16_t tlv_length)
 104 {
 105         struct mbuf *m_reply = NULL;
 106         struct sctp_asconf_paramhdr *aph;
 107         struct sctp_error_cause *error;
 108         uint32_t buf_len;
 109         uint16_t i, param_length, cause_length, padding_length;
 110         uint8_t *tlv;
 111
 112         if (error_tlv == NULL) {
 113                 tlv_length = 0;
 114         }
 115         cause_length = sizeof(struct sctp_error_cause) + tlv_length;
 116         param_length = sizeof(struct sctp_asconf_paramhdr) + cause_length;
 117         padding_length = tlv_length % 4;
 118         if (padding_length != 0) {
 119                 padding_length = 4 - padding_length;
 120         }
 121         buf_len = param_length + padding_length;
 122         if (buf_len > MLEN) {
 123                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 124                     "asconf_error_response: tlv_length (%xh) too big\n",
 125                     tlv_length);
 126                 return (NULL);
 127         }
 128         m_reply = sctp_get_mbuf_for_msg(buf_len, 0, M_NOWAIT, 1, MT_DATA);
 129         if (m_reply == NULL) {
 130                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 131                     "asconf_error_response: couldn't get mbuf!\n");
 132                 return (NULL);
 133         }
 134         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 135         aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
 136         aph->ph.param_length = htons(param_length);
 137         aph->correlation_id = id;
 138         error = (struct sctp_error_cause *)(aph + 1);
 139         error->code = htons(cause);
 140         error->length = htons(cause_length);
 141         if (error_tlv != NULL) {
 142                 tlv = (uint8_t *)(error + 1);
 143                 memcpy(tlv, error_tlv, tlv_length);
 144                 for (i = 0; i < padding_length; i++) {
 145                         tlv[tlv_length + i] = 0;
 146                 }
 147         }
 148         SCTP_BUF_LEN(m_reply) = buf_len;
 149         return (m_reply);
 150 }
 151
 152 static struct mbuf *
 153 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph,
 154     struct sctp_tcb *stcb, int send_hb, int response_required)
 155 {
 156         struct sctp_nets *net;
 157         struct mbuf *m_reply = NULL;
 158         union sctp_sockstore store;
 159         struct sctp_paramhdr *ph;
 160         uint16_t param_type, aparam_length;
 161 #if defined(INET) || defined(INET6)
 162         uint16_t param_length;
 163 #endif
 164         struct sockaddr *sa;
 165         int zero_address = 0;
 166         int bad_address = 0;
 167 #ifdef INET
 168         struct sockaddr_in *sin;
 169         struct sctp_ipv4addr_param *v4addr;
 170 #endif
 171 #ifdef INET6
 172         struct sockaddr_in6 *sin6;
 173         struct sctp_ipv6addr_param *v6addr;
 174 #endif
 175
 176         aparam_length = ntohs(aph->ph.param_length);
 177         if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) {
 178                 return (NULL);
 179         }
 180         ph = (struct sctp_paramhdr *)(aph + 1);
 181         param_type = ntohs(ph->param_type);
 182 #if defined(INET) || defined(INET6)
 183         param_length = ntohs(ph->param_length);
 184         if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) {
 185                 return (NULL);
 186         }
 187 #endif
 188         sa = &store.sa;
 189         switch (param_type) {
 190 #ifdef INET
 191         case SCTP_IPV4_ADDRESS:
 192                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 193                         /* invalid param size */
 194                         return (NULL);
 195                 }
 196                 v4addr = (struct sctp_ipv4addr_param *)ph;
 197                 sin = &store.sin;
 198                 memset(sin, 0, sizeof(*sin));
 199                 sin->sin_family = AF_INET;
 200                 sin->sin_len = sizeof(struct sockaddr_in);
 201                 sin->sin_port = stcb->rport;
 202                 sin->sin_addr.s_addr = v4addr->addr;
 203                 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 204                     IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 205                         bad_address = 1;
 206                 }
 207                 if (sin->sin_addr.s_addr == INADDR_ANY)
 208                         zero_address = 1;
 209                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 210                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 211                 break;
 212 #endif
 213 #ifdef INET6
 214         case SCTP_IPV6_ADDRESS:
 215                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 216                         /* invalid param size */
 217                         return (NULL);
 218                 }
 219                 v6addr = (struct sctp_ipv6addr_param *)ph;
 220                 sin6 = &store.sin6;
 221                 memset(sin6, 0, sizeof(*sin6));
 222                 sin6->sin6_family = AF_INET6;
 223                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 224                 sin6->sin6_port = stcb->rport;
 225                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 226                     sizeof(struct in6_addr));
 227                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 228                         bad_address = 1;
 229                 }
 230                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 231                         zero_address = 1;
 232                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 233                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 234                 break;
 235 #endif
 236         default:
 237                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 238                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph,
 239                     aparam_length);
 240                 return (m_reply);
 241         }                       /* end switch */
 242
 243         /* if 0.0.0.0/::0, add the source address instead */
 244         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 245                 sa = src;
 246                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 247                     "process_asconf_add_ip: using source addr ");
 248                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 249         }
 250         net = NULL;
 251         /* add the address */
 252         if (bad_address) {
 253                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 254                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph,
 255                     aparam_length);
 256         } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port,
 257                     SCTP_DONOT_SETSCOPE,
 258             SCTP_ADDR_DYNAMIC_ADDED) != 0) {
 259                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 260                     "process_asconf_add_ip: error adding address\n");
 261                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 262                     SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *)aph,
 263                     aparam_length);
 264         } else {
 265                 if (response_required) {
 266                         m_reply =
 267                             sctp_asconf_success_response(aph->correlation_id);
 268                 }
 269                 if (net != NULL) {
 270                         /* notify upper layer */
 271                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 272                         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
 273                         sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
 274                             stcb, net);
 275                         if (send_hb) {
 276                                 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 277                         }
 278                 }
 279         }
 280         return (m_reply);
 281 }
 282
 283 static int
 284 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
 285 {
 286         struct sctp_nets *src_net, *net, *nnet;
 287
 288         /* make sure the source address exists as a destination net */
 289         src_net = sctp_findnet(stcb, src);
 290         if (src_net == NULL) {
 291                 /* not found */
 292                 return (-1);
 293         }
 294
 295         /* delete all destination addresses except the source */
 296         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
 297                 if (net != src_net) {
 298                         /* delete this address */
 299                         SCTPDBG(SCTP_DEBUG_ASCONF1,
 300                             "asconf_del_remote_addrs_except: deleting ");
 301                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
 302                             (struct sockaddr *)&net->ro._l_addr);
 303                         /* notify upper layer */
 304                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
 305                             (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
 306                         sctp_remove_net(stcb, net);
 307                 }
 308         }
 309         return (0);
 310 }
 311
 312 static struct mbuf *
 313 sctp_process_asconf_delete_ip(struct sockaddr *src,
 314     struct sctp_asconf_paramhdr *aph,
 315     struct sctp_tcb *stcb, int response_required)
 316 {
 317         struct mbuf *m_reply = NULL;
 318         union sctp_sockstore store;
 319         struct sctp_paramhdr *ph;
 320         uint16_t param_type, aparam_length;
 321 #if defined(INET) || defined(INET6)
 322         uint16_t param_length;
 323 #endif
 324         struct sockaddr *sa;
 325         int zero_address = 0;
 326         int result;
 327 #ifdef INET
 328         struct sockaddr_in *sin;
 329         struct sctp_ipv4addr_param *v4addr;
 330 #endif
 331 #ifdef INET6
 332         struct sockaddr_in6 *sin6;
 333         struct sctp_ipv6addr_param *v6addr;
 334 #endif
 335
 336         aparam_length = ntohs(aph->ph.param_length);
 337         if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) {
 338                 return (NULL);
 339         }
 340         ph = (struct sctp_paramhdr *)(aph + 1);
 341         param_type = ntohs(ph->param_type);
 342 #if defined(INET) || defined(INET6)
 343         param_length = ntohs(ph->param_length);
 344         if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) {
 345                 return (NULL);
 346         }
 347 #endif
 348         sa = &store.sa;
 349         switch (param_type) {
 350 #ifdef INET
 351         case SCTP_IPV4_ADDRESS:
 352                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 353                         /* invalid param size */
 354                         return (NULL);
 355                 }
 356                 v4addr = (struct sctp_ipv4addr_param *)ph;
 357                 sin = &store.sin;
 358                 memset(sin, 0, sizeof(*sin));
 359                 sin->sin_family = AF_INET;
 360                 sin->sin_len = sizeof(struct sockaddr_in);
 361                 sin->sin_port = stcb->rport;
 362                 sin->sin_addr.s_addr = v4addr->addr;
 363                 if (sin->sin_addr.s_addr == INADDR_ANY)
 364                         zero_address = 1;
 365                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 366                     "process_asconf_delete_ip: deleting ");
 367                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 368                 break;
 369 #endif
 370 #ifdef INET6
 371         case SCTP_IPV6_ADDRESS:
 372                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 373                         /* invalid param size */
 374                         return (NULL);
 375                 }
 376                 v6addr = (struct sctp_ipv6addr_param *)ph;
 377                 sin6 = &store.sin6;
 378                 memset(sin6, 0, sizeof(*sin6));
 379                 sin6->sin6_family = AF_INET6;
 380                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 381                 sin6->sin6_port = stcb->rport;
 382                 memcpy(&sin6->sin6_addr, v6addr->addr,
 383                     sizeof(struct in6_addr));
 384                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 385                         zero_address = 1;
 386                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 387                     "process_asconf_delete_ip: deleting ");
 388                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 389                 break;
 390 #endif
 391         default:
 392                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 393                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 394                     aparam_length);
 395                 return (m_reply);
 396         }
 397
 398         /* make sure the source address is not being deleted */
 399         if (sctp_cmpaddr(sa, src)) {
 400                 /* trying to delete the source address! */
 401                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
 402                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 403                     SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph,
 404                     aparam_length);
 405                 return (m_reply);
 406         }
 407
 408         /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
 409         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 410                 result = sctp_asconf_del_remote_addrs_except(stcb, src);
 411
 412                 if (result) {
 413                         /* src address did not exist? */
 414                         SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
 415                         /* what error to reply with?? */
 416                         m_reply =
 417                             sctp_asconf_error_response(aph->correlation_id,
 418                             SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph,
 419                             aparam_length);
 420                 } else if (response_required) {
 421                         m_reply =
 422                             sctp_asconf_success_response(aph->correlation_id);
 423                 }
 424                 return (m_reply);
 425         }
 426
 427         /* delete the address */
 428         result = sctp_del_remote_addr(stcb, sa);
 429         /*
 430          * note if result == -2, the address doesn't exist in the asoc but
 431          * since it's being deleted anyways, we just ack the delete -- but
 432          * this probably means something has already gone awry
 433          */
 434         if (result == -1) {
 435                 /* only one address in the asoc */
 436                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
 437                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 438                     SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph,
 439                     aparam_length);
 440         } else {
 441                 if (response_required) {
 442                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 443                 }
 444                 /* notify upper layer */
 445                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 446         }
 447         return (m_reply);
 448 }
 449
 450 static struct mbuf *
 451 sctp_process_asconf_set_primary(struct sockaddr *src,
 452     struct sctp_asconf_paramhdr *aph,
 453     struct sctp_tcb *stcb, int response_required)
 454 {
 455         struct mbuf *m_reply = NULL;
 456         union sctp_sockstore store;
 457         struct sctp_paramhdr *ph;
 458         uint16_t param_type, aparam_length;
 459 #if defined(INET) || defined(INET6)
 460         uint16_t param_length;
 461 #endif
 462         struct sockaddr *sa;
 463         int zero_address = 0;
 464 #ifdef INET
 465         struct sockaddr_in *sin;
 466         struct sctp_ipv4addr_param *v4addr;
 467 #endif
 468 #ifdef INET6
 469         struct sockaddr_in6 *sin6;
 470         struct sctp_ipv6addr_param *v6addr;
 471 #endif
 472
 473         aparam_length = ntohs(aph->ph.param_length);
 474         if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) {
 475                 return (NULL);
 476         }
 477         ph = (struct sctp_paramhdr *)(aph + 1);
 478         param_type = ntohs(ph->param_type);
 479 #if defined(INET) || defined(INET6)
 480         param_length = ntohs(ph->param_length);
 481         if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) {
 482                 return (NULL);
 483         }
 484 #endif
 485         sa = &store.sa;
 486         switch (param_type) {
 487 #ifdef INET
 488         case SCTP_IPV4_ADDRESS:
 489                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 490                         /* invalid param size */
 491                         return (NULL);
 492                 }
 493                 v4addr = (struct sctp_ipv4addr_param *)ph;
 494                 sin = &store.sin;
 495                 memset(sin, 0, sizeof(*sin));
 496                 sin->sin_family = AF_INET;
 497                 sin->sin_len = sizeof(struct sockaddr_in);
 498                 sin->sin_addr.s_addr = v4addr->addr;
 499                 if (sin->sin_addr.s_addr == INADDR_ANY)
 500                         zero_address = 1;
 501                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 502                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 503                 break;
 504 #endif
 505 #ifdef INET6
 506         case SCTP_IPV6_ADDRESS:
 507                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 508                         /* invalid param size */
 509                         return (NULL);
 510                 }
 511                 v6addr = (struct sctp_ipv6addr_param *)ph;
 512                 sin6 = &store.sin6;
 513                 memset(sin6, 0, sizeof(*sin6));
 514                 sin6->sin6_family = AF_INET6;
 515                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 516                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 517                     sizeof(struct in6_addr));
 518                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 519                         zero_address = 1;
 520                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 521                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 522                 break;
 523 #endif
 524         default:
 525                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 526                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 527                     aparam_length);
 528                 return (m_reply);
 529         }
 530
 531         /* if 0.0.0.0/::0, use the source address instead */
 532         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 533                 sa = src;
 534                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 535                     "process_asconf_set_primary: using source addr ");
 536                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 537         }
 538         /* set the primary address */
 539         if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
 540                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 541                     "process_asconf_set_primary: primary address set\n");
 542                 /* notify upper layer */
 543                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 544                 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) &&
 545                     (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) &&
 546                     (stcb->asoc.alternate)) {
 547                         sctp_free_remote_addr(stcb->asoc.alternate);
 548                         stcb->asoc.alternate = NULL;
 549                 }
 550                 if (response_required) {
 551                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 552                 }
 553                 /*
 554                  * Mobility adaptation. Ideally, when the reception of SET
 555                  * PRIMARY with DELETE IP ADDRESS of the previous primary
 556                  * destination, unacknowledged DATA are retransmitted
 557                  * immediately to the new primary destination for seamless
 558                  * handover. If the destination is UNCONFIRMED and marked to
 559                  * REQ_PRIM, The retransmission occur when reception of the
 560                  * HEARTBEAT-ACK.  (See sctp_handle_heartbeat_ack in
 561                  * sctp_input.c) Also, when change of the primary
 562                  * destination, it is better that all subsequent new DATA
 563                  * containing already queued DATA are transmitted to the new
 564                  * primary destination. (by micchie)
 565                  */
 566                 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
 567                     SCTP_MOBILITY_BASE) ||
 568                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 569                     SCTP_MOBILITY_FASTHANDOFF)) &&
 570                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 571                     SCTP_MOBILITY_PRIM_DELETED) &&
 572                     (stcb->asoc.primary_destination->dest_state &
 573                     SCTP_ADDR_UNCONFIRMED) == 0) {
 574
 575                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
 576                             stcb->sctp_ep, stcb, NULL,
 577                             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1);
 578                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 579                             SCTP_MOBILITY_FASTHANDOFF)) {
 580                                 sctp_assoc_immediate_retrans(stcb,
 581                                     stcb->asoc.primary_destination);
 582                         }
 583                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 584                             SCTP_MOBILITY_BASE)) {
 585                                 sctp_move_chunks_from_net(stcb,
 586                                     stcb->asoc.deleted_primary);
 587                         }
 588                         sctp_delete_prim_timer(stcb->sctp_ep, stcb);
 589                 }
 590         } else {
 591                 /* couldn't set the requested primary address! */
 592                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 593                     "process_asconf_set_primary: set primary failed!\n");
 594                 /* must have been an invalid address, so report */
 595                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 596                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 597                     aparam_length);
 598         }
 599
 600         return (m_reply);
 601 }
 602
 603 /*
 604  * handles an ASCONF chunk.
 605  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 606  */
 607 void
 608 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 609     struct sockaddr *src,
 610     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 611     int first)
 612 {
 613         struct sctp_association *asoc;
 614         uint32_t serial_num;
 615         struct mbuf *n, *m_ack, *m_result, *m_tail;
 616         struct sctp_asconf_ack_chunk *ack_cp;
 617         struct sctp_asconf_paramhdr *aph;
 618         struct sctp_ipv6addr_param *p_addr;
 619         unsigned int asconf_limit, cnt;
 620         int error = 0;          /* did an error occur? */
 621
 622         /* asconf param buffer */
 623         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 624         struct sctp_asconf_ack *ack, *ack_next;
 625
 626         /* verify minimum length */
 627         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 628                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 629                     "handle_asconf: chunk too small = %xh\n",
 630                     ntohs(cp->ch.chunk_length));
 631                 return;
 632         }
 633         asoc = &stcb->asoc;
 634         serial_num = ntohl(cp->serial_number);
 635
 636         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 637                 /* got a duplicate ASCONF */
 638                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 639                     "handle_asconf: got duplicate serial number = %xh\n",
 640                     serial_num);
 641                 return;
 642         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 643                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 644                     serial_num, asoc->asconf_seq_in + 1);
 645                 return;
 646         }
 647
 648         /* it's the expected "next" sequence number, so process it */
 649         asoc->asconf_seq_in = serial_num;       /* update sequence */
 650         /* get length of all the param's in the ASCONF */
 651         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 652         SCTPDBG(SCTP_DEBUG_ASCONF1,
 653             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 654             asconf_limit, serial_num);
 655
 656         if (first) {
 657                 /* delete old cache */
 658                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 659
 660                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 661                         if (ack->serial_number == serial_num)
 662                                 break;
 663                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 664                             ack->serial_number, serial_num);
 665                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 666                         if (ack->data != NULL) {
 667                                 sctp_m_freem(ack->data);
 668                         }
 669                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 670                 }
 671         }
 672
 673         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 674             M_NOWAIT, 1, MT_DATA);
 675         if (m_ack == NULL) {
 676                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 677                     "handle_asconf: couldn't get mbuf!\n");
 678                 return;
 679         }
 680         m_tail = m_ack;         /* current reply chain's tail */
 681
 682         /* fill in ASCONF-ACK header */
 683         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 684         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 685         ack_cp->ch.chunk_flags = 0;
 686         ack_cp->serial_number = htonl(serial_num);
 687         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 688         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 689         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 690
 691         /* skip the lookup address parameter */
 692         offset += sizeof(struct sctp_asconf_chunk);
 693         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf);
 694         if (p_addr == NULL) {
 695                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 696                     "handle_asconf: couldn't get lookup addr!\n");
 697                 /* respond with a missing/invalid mandatory parameter error */
 698                 sctp_m_freem(m_ack);
 699                 return;
 700         }
 701         /* skip lookup addr */
 702         offset += SCTP_SIZE32(ntohs(p_addr->ph.param_length));
 703         /* get pointer to first asconf param in ASCONF */
 704         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf);
 705         if (aph == NULL) {
 706                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 707                 goto send_reply;
 708         }
 709         /* process through all parameters */
 710         cnt = 0;
 711         while (aph != NULL) {
 712                 unsigned int param_length, param_type;
 713
 714                 param_type = ntohs(aph->ph.param_type);
 715                 param_length = ntohs(aph->ph.param_length);
 716                 if (offset + param_length > asconf_limit) {
 717                         /* parameter goes beyond end of chunk! */
 718                         sctp_m_freem(m_ack);
 719                         return;
 720                 }
 721                 m_result = NULL;
 722
 723                 if (param_length > sizeof(aparam_buf)) {
 724                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 725                         sctp_m_freem(m_ack);
 726                         return;
 727                 }
 728                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 729                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 730                         sctp_m_freem(m_ack);
 731                         return;
 732                 }
 733                 /* get the entire parameter */
 734                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 735                 if (aph == NULL) {
 736                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 737                         sctp_m_freem(m_ack);
 738                         return;
 739                 }
 740                 switch (param_type) {
 741                 case SCTP_ADD_IP_ADDRESS:
 742                         m_result = sctp_process_asconf_add_ip(src, aph, stcb,
 743                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 744                         cnt++;
 745                         break;
 746                 case SCTP_DEL_IP_ADDRESS:
 747                         m_result = sctp_process_asconf_delete_ip(src, aph, stcb,
 748                             error);
 749                         break;
 750                 case SCTP_ERROR_CAUSE_IND:
 751                         /* not valid in an ASCONF chunk */
 752                         break;
 753                 case SCTP_SET_PRIM_ADDR:
 754                         m_result = sctp_process_asconf_set_primary(src, aph,
 755                             stcb, error);
 756                         break;
 757                 case SCTP_NAT_VTAGS:
 758                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 759                         break;
 760                 case SCTP_SUCCESS_REPORT:
 761                         /* not valid in an ASCONF chunk */
 762                         break;
 763                 case SCTP_ULP_ADAPTATION:
 764                         /* FIX */
 765                         break;
 766                 default:
 767                         if ((param_type & 0x8000) == 0) {
 768                                 /* Been told to STOP at this param */
 769                                 asconf_limit = offset;
 770                                 /*
 771                                  * FIX FIX - We need to call
 772                                  * sctp_arethere_unrecognized_parameters()
 773                                  * to get a operr and send it for any
 774                                  * param's with the 0x4000 bit set OR do it
 775                                  * here ourselves... note we still must STOP
 776                                  * if the 0x8000 bit is clear.
 777                                  */
 778                         }
 779                         /* unknown/invalid param type */
 780                         break;
 781                 }               /* switch */
 782
 783                 /* add any (error) result to the reply mbuf chain */
 784                 if (m_result != NULL) {
 785                         SCTP_BUF_NEXT(m_tail) = m_result;
 786                         m_tail = m_result;
 787                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 788                         /* set flag to force success reports */
 789                         error = 1;
 790                 }
 791                 offset += SCTP_SIZE32(param_length);
 792                 /* update remaining ASCONF message length to process */
 793                 if (offset >= asconf_limit) {
 794                         /* no more data in the mbuf chain */
 795                         break;
 796                 }
 797                 /* get pointer to next asconf param */
 798                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 799                     sizeof(struct sctp_asconf_paramhdr),
 800                     (uint8_t *)&aparam_buf);
 801                 if (aph == NULL) {
 802                         /* can't get an asconf paramhdr */
 803                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 804                         /* FIX ME - add error here... */
 805                 }
 806         }
 807
 808 send_reply:
 809         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 810         /* save the ASCONF-ACK reply */
 811         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 812             struct sctp_asconf_ack);
 813         if (ack == NULL) {
 814                 sctp_m_freem(m_ack);
 815                 return;
 816         }
 817         ack->serial_number = serial_num;
 818         ack->last_sent_to = NULL;
 819         ack->data = m_ack;
 820         ack->len = 0;
 821         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 822                 ack->len += SCTP_BUF_LEN(n);
 823         }
 824         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 825
 826         /* see if last_control_chunk_from is set properly (use IP src addr) */
 827         if (stcb->asoc.last_control_chunk_from == NULL) {
 828                 /*
 829                  * this could happen if the source address was just newly
 830                  * added
 831                  */
 832                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 833                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 834                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 835                 /* look up the from address */
 836                 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src);
 837 #ifdef SCTP_DEBUG
 838                 if (stcb->asoc.last_control_chunk_from == NULL) {
 839                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 840                 }
 841 #endif
 842         }
 843 }
 844
 845 /*
 846  * does the address match? returns 0 if not, 1 if so
 847  */
 848 static uint32_t
 849 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 850 {
 851         switch (sa->sa_family) {
 852 #ifdef INET6
 853         case AF_INET6:
 854                 {
 855                         /* XXX scopeid */
 856                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 857
 858                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 859                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 860                             sizeof(struct in6_addr)) == 0)) {
 861                                 return (1);
 862                         }
 863                         break;
 864                 }
 865 #endif
 866 #ifdef INET
 867         case AF_INET:
 868                 {
 869                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 870
 871                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 872                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 873                             sizeof(struct in_addr)) == 0)) {
 874                                 return (1);
 875                         }
 876                         break;
 877                 }
 878 #endif
 879         default:
 880                 break;
 881         }
 882         return (0);
 883 }
 884
 885 /*
 886  * does the address match? returns 0 if not, 1 if so
 887  */
 888 static uint32_t
 889 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 890 {
 891 #if defined(INET) || defined(INET6)
 892         uint16_t param_type, param_length;
 893
 894         param_type = ntohs(ph->param_type);
 895         param_length = ntohs(ph->param_length);
 896 #endif
 897         switch (sa->sa_family) {
 898 #ifdef INET6
 899         case AF_INET6:
 900                 {
 901                         /* XXX scopeid */
 902                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 903                         struct sctp_ipv6addr_param *v6addr;
 904
 905                         v6addr = (struct sctp_ipv6addr_param *)ph;
 906                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 907                             (param_length == sizeof(struct sctp_ipv6addr_param)) &&
 908                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 909                             sizeof(struct in6_addr)) == 0)) {
 910                                 return (1);
 911                         }
 912                         break;
 913                 }
 914 #endif
 915 #ifdef INET
 916         case AF_INET:
 917                 {
 918                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 919                         struct sctp_ipv4addr_param *v4addr;
 920
 921                         v4addr = (struct sctp_ipv4addr_param *)ph;
 922                         if ((param_type == SCTP_IPV4_ADDRESS) &&
 923                             (param_length == sizeof(struct sctp_ipv4addr_param)) &&
 924                             (memcmp(&v4addr->addr, &sin->sin_addr,
 925                             sizeof(struct in_addr)) == 0)) {
 926                                 return (1);
 927                         }
 928                         break;
 929                 }
 930 #endif
 931         default:
 932                 break;
 933         }
 934         return (0);
 935 }
 936
 937 /*
 938  * Cleanup for non-responded/OP ERR'd ASCONF
 939  */
 940 void
 941 sctp_asconf_cleanup(struct sctp_tcb *stcb)
 942 {
 943         /*
 944          * clear out any existing asconfs going out
 945          */
 946         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL,
 947             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
 948         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
 949         /* remove the old ASCONF on our outbound queue */
 950         sctp_toss_old_asconf(stcb);
 951 }
 952
 953 /*
 954  * cleanup any cached source addresses that may be topologically
 955  * incorrect after a new address has been added to this interface.
 956  */
 957 static void
 958 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
 959 {
 960         struct sctp_nets *net;
 961
 962         /*
 963          * Ideally, we want to only clear cached routes and source addresses
 964          * that are topologically incorrect.  But since there is no easy way
 965          * to know whether the newly added address on the ifn would cause a
 966          * routing change (i.e. a new egress interface would be chosen)
 967          * without doing a new routing lookup and source address selection,
 968          * we will (for now) just flush any cached route using a different
 969          * ifn (and cached source addrs) and let output re-choose them
 970          * during the next send on that net.
 971          */
 972         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 973                 /*
 974                  * clear any cached route (and cached source address) if the
 975                  * route's interface is NOT the same as the address change.
 976                  * If it's the same interface, just clear the cached source
 977                  * address.
 978                  */
 979                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
 980                     ((ifn == NULL) ||
 981                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
 982                         /* clear any cached route */
 983                         RO_NHFREE(&net->ro);
 984                 }
 985                 /* clear any cached source address */
 986                 if (net->src_addr_selected) {
 987                         sctp_free_ifa(net->ro._s_addr);
 988                         net->ro._s_addr = NULL;
 989                         net->src_addr_selected = 0;
 990                 }
 991         }
 992 }
 993
 994
 995 void
 996 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
 997 {
 998         int error;
 999
1000         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
1001                 return;
1002         }
1003         if (stcb->asoc.deleted_primary == NULL) {
1004                 return;
1005         }
1006
1007         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
1008                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
1009                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1010                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
1011                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
1012                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
1013                     stcb->asoc.deleted_primary,
1014                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
1015                 stcb->asoc.num_send_timers_up--;
1016                 if (stcb->asoc.num_send_timers_up < 0) {
1017                         stcb->asoc.num_send_timers_up = 0;
1018                 }
1019                 SCTP_TCB_LOCK_ASSERT(stcb);
1020                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1021                     stcb->asoc.deleted_primary);
1022                 if (error) {
1023                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1024                         return;
1025                 }
1026                 SCTP_TCB_LOCK_ASSERT(stcb);
1027 #ifdef SCTP_AUDITING_ENABLED
1028                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1029 #endif
1030                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1031                 if ((stcb->asoc.num_send_timers_up == 0) &&
1032                     (stcb->asoc.sent_queue_cnt > 0)) {
1033                         struct sctp_tmit_chunk *chk;
1034
1035                         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1036                                 if (chk->whoTo != NULL) {
1037                                         break;
1038                                 }
1039                         }
1040                         if (chk != NULL) {
1041                                 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
1042                         }
1043                 }
1044         }
1045         return;
1046 }
1047
1048 static int
1049     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1050
1051 void
1052 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1053 {
1054         struct sctp_tmit_chunk *chk;
1055
1056         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1057         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1058             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4);
1059         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1060         net->error_count = 0;
1061         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1062                 if (chk->whoTo == net) {
1063                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1064                                 chk->sent = SCTP_DATAGRAM_RESEND;
1065                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1066                                 sctp_flight_size_decrease(chk);
1067                                 sctp_total_flight_decrease(stcb, chk);
1068                                 net->marked_retrans++;
1069                                 stcb->asoc.marked_retrans++;
1070                         }
1071                 }
1072         }
1073         if (net->marked_retrans) {
1074                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1075         }
1076 }
1077
1078 static void
1079 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1080 {
1081         struct sctp_nets *net;
1082         int addrnum, changed;
1083
1084         /*
1085          * If number of local valid addresses is 1, the valid address is
1086          * probably newly added address. Several valid addresses in this
1087          * association.  A source address may not be changed.  Additionally,
1088          * they can be configured on a same interface as "alias" addresses.
1089          * (by micchie)
1090          */
1091         addrnum = sctp_local_addr_count(stcb);
1092         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1093             addrnum);
1094         if (addrnum == 1) {
1095                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1096                         /* clear any cached route and source address */
1097                         RO_NHFREE(&net->ro);
1098                         if (net->src_addr_selected) {
1099                                 sctp_free_ifa(net->ro._s_addr);
1100                                 net->ro._s_addr = NULL;
1101                                 net->src_addr_selected = 0;
1102                         }
1103                         /* Retransmit unacknowledged DATA chunks immediately */
1104                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1105                             SCTP_MOBILITY_FASTHANDOFF)) {
1106                                 sctp_net_immediate_retrans(stcb, net);
1107                         }
1108                         /* also, SET PRIMARY is maybe already sent */
1109                 }
1110                 return;
1111         }
1112
1113         /* Multiple local addresses exsist in the association.  */
1114         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1115                 /* clear any cached route and source address */
1116                 RO_NHFREE(&net->ro);
1117                 if (net->src_addr_selected) {
1118                         sctp_free_ifa(net->ro._s_addr);
1119                         net->ro._s_addr = NULL;
1120                         net->src_addr_selected = 0;
1121                 }
1122                 /*
1123                  * Check if the nexthop is corresponding to the new address.
1124                  * If the new address is corresponding to the current
1125                  * nexthop, the path will be changed. If the new address is
1126                  * NOT corresponding to the current nexthop, the path will
1127                  * not be changed.
1128                  */
1129                 SCTP_RTALLOC((sctp_route_t *)&net->ro,
1130                     stcb->sctp_ep->def_vrf_id,
1131                     stcb->sctp_ep->fibnum);
1132                 if (net->ro.ro_nh == NULL)
1133                         continue;
1134
1135                 changed = 0;
1136                 switch (net->ro._l_addr.sa.sa_family) {
1137 #ifdef INET
1138                 case AF_INET:
1139                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) {
1140                                 changed = 1;
1141                         }
1142                         break;
1143 #endif
1144 #ifdef INET6
1145                 case AF_INET6:
1146                         if (sctp_v6src_match_nexthop(
1147                             &newifa->address.sin6, (sctp_route_t *)&net->ro)) {
1148                                 changed = 1;
1149                         }
1150                         break;
1151 #endif
1152                 default:
1153                         break;
1154                 }
1155                 /*
1156                  * if the newly added address does not relate routing
1157                  * information, we skip.
1158                  */
1159                 if (changed == 0)
1160                         continue;
1161                 /* Retransmit unacknowledged DATA chunks immediately */
1162                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1163                     SCTP_MOBILITY_FASTHANDOFF)) {
1164                         sctp_net_immediate_retrans(stcb, net);
1165                 }
1166                 /* Send SET PRIMARY for this new address */
1167                 if (net == stcb->asoc.primary_destination) {
1168                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1169                             SCTP_SET_PRIM_ADDR);
1170                 }
1171         }
1172 }
1173
1174 /*
1175  * process an ADD/DELETE IP ack from peer.
1176  * addr: corresponding sctp_ifa to the address being added/deleted.
1177  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1178  * flag: 1=success, 0=failure.
1179  */
1180 static void
1181 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1182 {
1183         /*
1184          * do the necessary asoc list work- if we get a failure indication,
1185          * leave the address on the assoc's restricted list.  If we get a
1186          * success indication, remove the address from the restricted list.
1187          */
1188         /*
1189          * Note: this will only occur for ADD_IP_ADDRESS, since
1190          * DEL_IP_ADDRESS is never actually added to the list...
1191          */
1192         if (flag) {
1193                 /* success case, so remove from the restricted list */
1194                 sctp_del_local_addr_restricted(stcb, addr);
1195
1196                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1197                     SCTP_MOBILITY_BASE) ||
1198                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1199                     SCTP_MOBILITY_FASTHANDOFF)) {
1200                         sctp_path_check_and_react(stcb, addr);
1201                         return;
1202                 }
1203                 /* clear any cached/topologically incorrect source addresses */
1204                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1205         }
1206         /* else, leave it on the list */
1207 }
1208
1209 /*
1210  * add an asconf add/delete/set primary IP address parameter to the queue.
1211  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1212  * returns 0 if queued, -1 if not queued/removed.
1213  * NOTE: if adding, but a delete for the same address is already scheduled
1214  * (and not yet sent out), simply remove it from queue.  Same for deleting
1215  * an address already scheduled for add.  If a duplicate operation is found,
1216  * ignore the new one.
1217  */
1218 static int
1219 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1220     uint16_t type)
1221 {
1222         struct sctp_asconf_addr *aa, *aa_next;
1223
1224         /* make sure the request isn't already in the queue */
1225         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1226                 /* address match? */
1227                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1228                         continue;
1229                 /*
1230                  * is the request already in queue but not sent? pass the
1231                  * request already sent in order to resolve the following
1232                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1233                  * can't remove the ADD request already sent 3. arrival of
1234                  * ADD
1235                  */
1236                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1237                         return (-1);
1238                 }
1239                 /* is the negative request already in queue, and not sent */
1240                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1241                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1242                         /* add requested, delete already queued */
1243                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1244                         /* remove the ifa from the restricted list */
1245                         sctp_del_local_addr_restricted(stcb, ifa);
1246                         /* free the asconf param */
1247                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1248                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1249                         return (-1);
1250                 }
1251                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1252                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1253                         /* delete requested, add already queued */
1254                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1255                         /* remove the aa->ifa from the restricted list */
1256                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1257                         /* free the asconf param */
1258                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1259                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1260                         return (-1);
1261                 }
1262         }                       /* for each aa */
1263
1264         /* adding new request to the queue */
1265         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1266             SCTP_M_ASC_ADDR);
1267         if (aa == NULL) {
1268                 /* didn't get memory */
1269                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1270                 return (-1);
1271         }
1272         aa->special_del = 0;
1273         /* fill in asconf address parameter fields */
1274         /* top level elements are "networked" during send */
1275         aa->ap.aph.ph.param_type = type;
1276         aa->ifa = ifa;
1277         atomic_add_int(&ifa->refcount, 1);
1278         /* correlation_id filled in during send routine later... */
1279         switch (ifa->address.sa.sa_family) {
1280 #ifdef INET6
1281         case AF_INET6:
1282                 {
1283                         struct sockaddr_in6 *sin6;
1284
1285                         sin6 = &ifa->address.sin6;
1286                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1287                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1288                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1289                             sizeof(struct sctp_ipv6addr_param);
1290                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1291                             sizeof(struct in6_addr));
1292                         break;
1293                 }
1294 #endif
1295 #ifdef INET
1296         case AF_INET:
1297                 {
1298                         struct sockaddr_in *sin;
1299
1300                         sin = &ifa->address.sin;
1301                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1302                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1303                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1304                             sizeof(struct sctp_ipv4addr_param);
1305                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1306                             sizeof(struct in_addr));
1307                         break;
1308                 }
1309 #endif
1310         default:
1311                 /* invalid family! */
1312                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1313                 sctp_free_ifa(ifa);
1314                 return (-1);
1315         }
1316         aa->sent = 0;           /* clear sent flag */
1317
1318         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1319 #ifdef SCTP_DEBUG
1320         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1321                 if (type == SCTP_ADD_IP_ADDRESS) {
1322                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1323                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1324                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1325                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1326                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1327                 } else {
1328                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1329                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1330                 }
1331         }
1332 #endif
1333
1334         return (0);
1335 }
1336
1337
1338 /*
1339  * add an asconf operation for the given ifa and type.
1340  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1341  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1342  * advisable.
1343  */
1344 static int
1345 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1346     uint16_t type)
1347 {
1348         uint32_t status;
1349         int pending_delete_queued = 0;
1350         int last;
1351
1352         /* see if peer supports ASCONF */
1353         if (stcb->asoc.asconf_supported == 0) {
1354                 return (-1);
1355         }
1356
1357         /*
1358          * if this is deleting the last address from the assoc, mark it as
1359          * pending.
1360          */
1361         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) {
1362                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1363                         last = (sctp_local_addr_count(stcb) == 0);
1364                 } else {
1365                         last = (sctp_local_addr_count(stcb) == 1);
1366                 }
1367                 if (last) {
1368                         /* set the pending delete info only */
1369                         stcb->asoc.asconf_del_pending = 1;
1370                         stcb->asoc.asconf_addr_del_pending = ifa;
1371                         atomic_add_int(&ifa->refcount, 1);
1372                         SCTPDBG(SCTP_DEBUG_ASCONF2,
1373                             "asconf_queue_add: mark delete last address pending\n");
1374                         return (-1);
1375                 }
1376         }
1377
1378         /* queue an asconf parameter */
1379         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1380
1381         /*
1382          * if this is an add, and there is a delete also pending (i.e. the
1383          * last local address is being changed), queue the pending delete
1384          * too.
1385          */
1386         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1387                 /* queue in the pending delete */
1388                 if (sctp_asconf_queue_mgmt(stcb,
1389                     stcb->asoc.asconf_addr_del_pending,
1390                     SCTP_DEL_IP_ADDRESS) == 0) {
1391                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n");
1392                         pending_delete_queued = 1;
1393                         /* clear out the pending delete info */
1394                         stcb->asoc.asconf_del_pending = 0;
1395                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1396                         stcb->asoc.asconf_addr_del_pending = NULL;
1397                 }
1398         }
1399
1400         if (pending_delete_queued) {
1401                 struct sctp_nets *net;
1402
1403                 /*
1404                  * since we know that the only/last address is now being
1405                  * changed in this case, reset the cwnd/rto on all nets to
1406                  * start as a new address and path.  Also clear the error
1407                  * counts to give the assoc the best chance to complete the
1408                  * address change.
1409                  */
1410                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1411                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1412                             net);
1413                         net->RTO = 0;
1414                         net->error_count = 0;
1415                 }
1416                 stcb->asoc.overall_error_count = 0;
1417                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1418                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1419                             stcb->asoc.overall_error_count,
1420                             0,
1421                             SCTP_FROM_SCTP_ASCONF,
1422                             __LINE__);
1423                 }
1424
1425                 /* queue in an advisory set primary too */
1426                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1427                 /* let caller know we should send this out immediately */
1428                 status = 1;
1429         }
1430         return (status);
1431 }
1432
1433 /*-
1434  * add an asconf delete IP address parameter to the queue by sockaddr and
1435  * possibly with no sctp_ifa available.  This is only called by the routine
1436  * that checks the addresses in an INIT-ACK against the current address list.
1437  * returns 0 if completed, non-zero if not completed.
1438  * NOTE: if an add is already scheduled (and not yet sent out), simply
1439  * remove it from queue.  If a duplicate operation is found, ignore the
1440  * new one.
1441  */
1442 static int
1443 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1444 {
1445         struct sctp_ifa *ifa;
1446         struct sctp_asconf_addr *aa, *aa_next;
1447
1448         if (stcb == NULL) {
1449                 return (-1);
1450         }
1451         /* see if peer supports ASCONF */
1452         if (stcb->asoc.asconf_supported == 0) {
1453                 return (-1);
1454         }
1455         /* make sure the request isn't already in the queue */
1456         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1457                 /* address match? */
1458                 if (sctp_asconf_addr_match(aa, sa) == 0)
1459                         continue;
1460                 /* is the request already in queue (sent or not) */
1461                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1462                         return (-1);
1463                 }
1464                 /* is the negative request already in queue, and not sent */
1465                 if (aa->sent == 1)
1466                         continue;
1467                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1468                         /* add already queued, so remove existing entry */
1469                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1470                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1471                         /* free the entry */
1472                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1473                         return (-1);
1474                 }
1475         }                       /* for each aa */
1476
1477         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1478         ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED);
1479
1480         /* adding new request to the queue */
1481         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1482             SCTP_M_ASC_ADDR);
1483         if (aa == NULL) {
1484                 /* didn't get memory */
1485                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1486                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1487                 return (-1);
1488         }
1489         aa->special_del = 0;
1490         /* fill in asconf address parameter fields */
1491         /* top level elements are "networked" during send */
1492         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1493         aa->ifa = ifa;
1494         if (ifa)
1495                 atomic_add_int(&ifa->refcount, 1);
1496         /* correlation_id filled in during send routine later... */
1497         switch (sa->sa_family) {
1498 #ifdef INET6
1499         case AF_INET6:
1500                 {
1501                         /* IPv6 address */
1502                         struct sockaddr_in6 *sin6;
1503
1504                         sin6 = (struct sockaddr_in6 *)sa;
1505                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1506                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1507                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1508                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1509                             sizeof(struct in6_addr));
1510                         break;
1511                 }
1512 #endif
1513 #ifdef INET
1514         case AF_INET:
1515                 {
1516                         /* IPv4 address */
1517                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1518
1519                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1520                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1521                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1522                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1523                             sizeof(struct in_addr));
1524                         break;
1525                 }
1526 #endif
1527         default:
1528                 /* invalid family! */
1529                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1530                 if (ifa)
1531                         sctp_free_ifa(ifa);
1532                 return (-1);
1533         }
1534         aa->sent = 0;           /* clear sent flag */
1535
1536         /* delete goes to the back of the queue */
1537         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1538
1539         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1540         return (0);
1541 }
1542
1543 /*
1544  * find a specific asconf param on our "sent" queue
1545  */
1546 static struct sctp_asconf_addr *
1547 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1548 {
1549         struct sctp_asconf_addr *aa;
1550
1551         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1552                 if (aa->ap.aph.correlation_id == correlation_id &&
1553                     aa->sent == 1) {
1554                         /* found it */
1555                         return (aa);
1556                 }
1557         }
1558         /* didn't find it */
1559         return (NULL);
1560 }
1561
1562 /*
1563  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1564  * notifications based on the error response
1565  */
1566 static void
1567 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED,
1568     struct sctp_asconf_paramhdr *aph)
1569 {
1570         struct sctp_error_cause *eh;
1571         struct sctp_paramhdr *ph;
1572         uint16_t param_type;
1573         uint16_t error_code;
1574
1575         eh = (struct sctp_error_cause *)(aph + 1);
1576         ph = (struct sctp_paramhdr *)(eh + 1);
1577         /* validate lengths */
1578         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1579             htons(aph->ph.param_length)) {
1580                 /* invalid error cause length */
1581                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1582                     "asconf_process_error: cause element too long\n");
1583                 return;
1584         }
1585         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1586             htons(eh->length)) {
1587                 /* invalid included TLV length */
1588                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1589                     "asconf_process_error: included TLV too long\n");
1590                 return;
1591         }
1592         /* which error code ? */
1593         error_code = ntohs(eh->code);
1594         param_type = ntohs(aph->ph.param_type);
1595         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1596         switch (error_code) {
1597         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1598                 /* we allow ourselves to "try again" for this error */
1599                 break;
1600         default:
1601                 /* peer can't handle it... */
1602                 switch (param_type) {
1603                 case SCTP_ADD_IP_ADDRESS:
1604                 case SCTP_DEL_IP_ADDRESS:
1605                 case SCTP_SET_PRIM_ADDR:
1606                         break;
1607                 default:
1608                         break;
1609                 }
1610         }
1611 }
1612
1613 /*
1614  * process an asconf queue param.
1615  * aparam: parameter to process, will be removed from the queue.
1616  * flag: 1=success case, 0=failure case
1617  */
1618 static void
1619 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1620     struct sctp_asconf_addr *aparam, uint32_t flag)
1621 {
1622         uint16_t param_type;
1623
1624         /* process this param */
1625         param_type = aparam->ap.aph.ph.param_type;
1626         switch (param_type) {
1627         case SCTP_ADD_IP_ADDRESS:
1628                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1629                     "process_param_ack: added IP address\n");
1630                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1631                 break;
1632         case SCTP_DEL_IP_ADDRESS:
1633                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1634                     "process_param_ack: deleted IP address\n");
1635                 /* nothing really to do... lists already updated */
1636                 break;
1637         case SCTP_SET_PRIM_ADDR:
1638                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1639                     "process_param_ack: set primary IP address\n");
1640                 /* nothing to do... peer may start using this addr */
1641                 break;
1642         default:
1643                 /* should NEVER happen */
1644                 break;
1645         }
1646
1647         /* remove the param and free it */
1648         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1649         if (aparam->ifa)
1650                 sctp_free_ifa(aparam->ifa);
1651         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1652 }
1653
1654 /*
1655  * cleanup from a bad asconf ack parameter
1656  */
1657 static void
1658 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED)
1659 {
1660         /* assume peer doesn't really know how to do asconfs */
1661         /* XXX we could free the pending queue here */
1662
1663 }
1664
1665 void
1666 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1667     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1668     struct sctp_nets *net, int *abort_no_unlock)
1669 {
1670         struct sctp_association *asoc;
1671         uint32_t serial_num;
1672         uint16_t ack_length;
1673         struct sctp_asconf_paramhdr *aph;
1674         struct sctp_asconf_addr *aa, *aa_next;
1675         uint32_t last_error_id = 0;     /* last error correlation id */
1676         uint32_t id;
1677         struct sctp_asconf_addr *ap;
1678
1679         /* asconf param buffer */
1680         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1681
1682         /* verify minimum length */
1683         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1684                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1685                     "handle_asconf_ack: chunk too small = %xh\n",
1686                     ntohs(cp->ch.chunk_length));
1687                 return;
1688         }
1689         asoc = &stcb->asoc;
1690         serial_num = ntohl(cp->serial_number);
1691
1692         /*
1693          * NOTE: we may want to handle this differently- currently, we will
1694          * abort when we get an ack for the expected serial number + 1 (eg.
1695          * we didn't send it), process an ack normally if it is the expected
1696          * serial number, and re-send the previous ack for *ALL* other
1697          * serial numbers
1698          */
1699
1700         /*
1701          * if the serial number is the next expected, but I didn't send it,
1702          * abort the asoc, since someone probably just hijacked us...
1703          */
1704         if (serial_num == (asoc->asconf_seq_out + 1)) {
1705                 struct mbuf *op_err;
1706                 char msg[SCTP_DIAG_INFO_LEN];
1707
1708                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1709                 SCTP_SNPRINTF(msg, sizeof(msg), "Never sent serial number %8.8x", serial_num);
1710                 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
1711                 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
1712                 *abort_no_unlock = 1;
1713                 return;
1714         }
1715         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1716                 /* got a duplicate/unexpected ASCONF-ACK */
1717                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1718                     serial_num, asoc->asconf_seq_out_acked + 1);
1719                 return;
1720         }
1721
1722         if (serial_num == asoc->asconf_seq_out - 1) {
1723                 /* stop our timer */
1724                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL,
1725                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5);
1726         }
1727
1728         /* process the ASCONF-ACK contents */
1729         ack_length = ntohs(cp->ch.chunk_length) -
1730             sizeof(struct sctp_asconf_ack_chunk);
1731         offset += sizeof(struct sctp_asconf_ack_chunk);
1732         /* process through all parameters */
1733         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1734                 unsigned int param_length, param_type;
1735
1736                 /* get pointer to next asconf parameter */
1737                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1738                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1739                 if (aph == NULL) {
1740                         /* can't get an asconf paramhdr */
1741                         sctp_asconf_ack_clear(stcb);
1742                         return;
1743                 }
1744                 param_type = ntohs(aph->ph.param_type);
1745                 param_length = ntohs(aph->ph.param_length);
1746                 if (param_length > ack_length) {
1747                         sctp_asconf_ack_clear(stcb);
1748                         return;
1749                 }
1750                 if (param_length < sizeof(struct sctp_paramhdr)) {
1751                         sctp_asconf_ack_clear(stcb);
1752                         return;
1753                 }
1754                 /* get the complete parameter... */
1755                 if (param_length > sizeof(aparam_buf)) {
1756                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1757                             "param length (%u) larger than buffer size!\n", param_length);
1758                         sctp_asconf_ack_clear(stcb);
1759                         return;
1760                 }
1761                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1762                 if (aph == NULL) {
1763                         sctp_asconf_ack_clear(stcb);
1764                         return;
1765                 }
1766                 /* correlation_id is transparent to peer, no ntohl needed */
1767                 id = aph->correlation_id;
1768
1769                 switch (param_type) {
1770                 case SCTP_ERROR_CAUSE_IND:
1771                         last_error_id = id;
1772                         /* find the corresponding asconf param in our queue */
1773                         ap = sctp_asconf_find_param(stcb, id);
1774                         if (ap == NULL) {
1775                                 /* hmm... can't find this in our queue! */
1776                                 break;
1777                         }
1778                         /* process the parameter, failed flag */
1779                         sctp_asconf_process_param_ack(stcb, ap, 0);
1780                         /* process the error response */
1781                         sctp_asconf_process_error(stcb, aph);
1782                         break;
1783                 case SCTP_SUCCESS_REPORT:
1784                         /* find the corresponding asconf param in our queue */
1785                         ap = sctp_asconf_find_param(stcb, id);
1786                         if (ap == NULL) {
1787                                 /* hmm... can't find this in our queue! */
1788                                 break;
1789                         }
1790                         /* process the parameter, success flag */
1791                         sctp_asconf_process_param_ack(stcb, ap, 1);
1792                         break;
1793                 default:
1794                         break;
1795                 }               /* switch */
1796
1797                 /* update remaining ASCONF-ACK message length to process */
1798                 if (ack_length > SCTP_SIZE32(param_length)) {
1799                         ack_length -= SCTP_SIZE32(param_length);
1800                 } else {
1801                         break;
1802                 }
1803                 offset += SCTP_SIZE32(param_length);
1804         }                       /* while */
1805
1806         /*
1807          * if there are any "sent" params still on the queue, these are
1808          * implicitly "success", or "failed" (if we got an error back) ...
1809          * so process these appropriately
1810          *
1811          * we assume that the correlation_id's are monotonically increasing
1812          * beginning from 1 and that we don't have *that* many outstanding
1813          * at any given time
1814          */
1815         if (last_error_id == 0)
1816                 last_error_id--;        /* set to "max" value */
1817         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1818                 if (aa->sent == 1) {
1819                         /*
1820                          * implicitly successful or failed if correlation_id
1821                          * < last_error_id, then success else, failure
1822                          */
1823                         if (aa->ap.aph.correlation_id < last_error_id)
1824                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1825                         else
1826                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1827                 } else {
1828                         /*
1829                          * since we always process in order (FIFO queue) if
1830                          * we reach one that hasn't been sent, the rest
1831                          * should not have been sent either. so, we're
1832                          * done...
1833                          */
1834                         break;
1835                 }
1836         }
1837
1838         /* update the next sequence number to use */
1839         asoc->asconf_seq_out_acked++;
1840         /* remove the old ASCONF on our outbound queue */
1841         sctp_toss_old_asconf(stcb);
1842         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1843 #ifdef SCTP_TIMER_BASED_ASCONF
1844                 /* we have more params, so restart our timer */
1845                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1846                     stcb, net);
1847 #else
1848                 /* we have more params, so send out more */
1849                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1850 #endif
1851         }
1852 }
1853
1854 #ifdef INET6
1855 static uint32_t
1856 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1857 {
1858         struct sockaddr_in6 *sin6, *net6;
1859         struct sctp_nets *net;
1860
1861         if (sa->sa_family != AF_INET6) {
1862                 /* wrong family */
1863                 return (0);
1864         }
1865         sin6 = (struct sockaddr_in6 *)sa;
1866         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1867                 /* not link local address */
1868                 return (0);
1869         }
1870         /* hunt through our destination nets list for this scope_id */
1871         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1872                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1873                     AF_INET6)
1874                         continue;
1875                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1876                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1877                         continue;
1878                 if (sctp_is_same_scope(sin6, net6)) {
1879                         /* found one */
1880                         return (1);
1881                 }
1882         }
1883         /* didn't find one */
1884         return (0);
1885 }
1886 #endif
1887
1888 /*
1889  * address management functions
1890  */
1891 static void
1892 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1893     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1894 {
1895         int status;
1896
1897         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1898             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1899                 /* subset bound, no ASCONF allowed case, so ignore */
1900                 return;
1901         }
1902         /*
1903          * note: we know this is not the subset bound, no ASCONF case eg.
1904          * this is boundall or subset bound w/ASCONF allowed
1905          */
1906
1907         /* first, make sure that the address is IPv4 or IPv6 and not jailed */
1908         switch (ifa->address.sa.sa_family) {
1909 #ifdef INET6
1910         case AF_INET6:
1911                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1912                     &ifa->address.sin6.sin6_addr) != 0) {
1913                         return;
1914                 }
1915                 break;
1916 #endif
1917 #ifdef INET
1918         case AF_INET:
1919                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1920                     &ifa->address.sin.sin_addr) != 0) {
1921                         return;
1922                 }
1923                 break;
1924 #endif
1925         default:
1926                 return;
1927         }
1928 #ifdef INET6
1929         /* make sure we're "allowed" to add this type of addr */
1930         if (ifa->address.sa.sa_family == AF_INET6) {
1931                 /* invalid if we're not a v6 endpoint */
1932                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1933                         return;
1934                 /* is the v6 addr really valid ? */
1935                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1936                         return;
1937                 }
1938         }
1939 #endif
1940         /* put this address on the "pending/do not use yet" list */
1941         sctp_add_local_addr_restricted(stcb, ifa);
1942         /*
1943          * check address scope if address is out of scope, don't queue
1944          * anything... note: this would leave the address on both inp and
1945          * asoc lists
1946          */
1947         switch (ifa->address.sa.sa_family) {
1948 #ifdef INET6
1949         case AF_INET6:
1950                 {
1951                         struct sockaddr_in6 *sin6;
1952
1953                         sin6 = &ifa->address.sin6;
1954                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1955                                 /* we skip unspecifed addresses */
1956                                 return;
1957                         }
1958                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1959                                 if (stcb->asoc.scope.local_scope == 0) {
1960                                         return;
1961                                 }
1962                                 /* is it the right link local scope? */
1963                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1964                                         return;
1965                                 }
1966                         }
1967                         if (stcb->asoc.scope.site_scope == 0 &&
1968                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1969                                 return;
1970                         }
1971                         break;
1972                 }
1973 #endif
1974 #ifdef INET
1975         case AF_INET:
1976                 {
1977                         struct sockaddr_in *sin;
1978
1979                         /* invalid if we are a v6 only endpoint */
1980                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1981                             SCTP_IPV6_V6ONLY(inp))
1982                                 return;
1983
1984                         sin = &ifa->address.sin;
1985                         if (sin->sin_addr.s_addr == 0) {
1986                                 /* we skip unspecifed addresses */
1987                                 return;
1988                         }
1989                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
1990                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1991                                 return;
1992                         }
1993                         break;
1994                 }
1995 #endif
1996         default:
1997                 /* else, not AF_INET or AF_INET6, so skip */
1998                 return;
1999         }
2000
2001         /* queue an asconf for this address add/delete */
2002         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
2003                 /* does the peer do asconf? */
2004                 if (stcb->asoc.asconf_supported) {
2005                         /* queue an asconf for this addr */
2006                         status = sctp_asconf_queue_add(stcb, ifa, type);
2007
2008                         /*
2009                          * if queued ok, and in the open state, send out the
2010                          * ASCONF.  If in the non-open state, these will be
2011                          * sent when the state goes open.
2012                          */
2013                         if (status == 0 &&
2014                             ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2015                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) {
2016 #ifdef SCTP_TIMER_BASED_ASCONF
2017                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
2018                                     stcb, stcb->asoc.primary_destination);
2019 #else
2020                                 sctp_send_asconf(stcb, NULL, addr_locked);
2021 #endif
2022                         }
2023                 }
2024         }
2025 }
2026
2027
2028 int
2029 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2030 {
2031         struct sctp_asconf_iterator *asc;
2032         struct sctp_ifa *ifa;
2033         struct sctp_laddr *l;
2034         int cnt_invalid = 0;
2035
2036         asc = (struct sctp_asconf_iterator *)ptr;
2037         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2038                 ifa = l->ifa;
2039                 switch (ifa->address.sa.sa_family) {
2040 #ifdef INET6
2041                 case AF_INET6:
2042                         /* invalid if we're not a v6 endpoint */
2043                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2044                                 cnt_invalid++;
2045                                 if (asc->cnt == cnt_invalid)
2046                                         return (1);
2047                         }
2048                         break;
2049 #endif
2050 #ifdef INET
2051                 case AF_INET:
2052                         {
2053                                 /* invalid if we are a v6 only endpoint */
2054                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2055                                     SCTP_IPV6_V6ONLY(inp)) {
2056                                         cnt_invalid++;
2057                                         if (asc->cnt == cnt_invalid)
2058                                                 return (1);
2059                                 }
2060                                 break;
2061                         }
2062 #endif
2063                 default:
2064                         /* invalid address family */
2065                         cnt_invalid++;
2066                         if (asc->cnt == cnt_invalid)
2067                                 return (1);
2068                 }
2069         }
2070         return (0);
2071 }
2072
2073 static int
2074 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2075 {
2076         struct sctp_ifa *ifa;
2077         struct sctp_asconf_iterator *asc;
2078         struct sctp_laddr *laddr, *nladdr, *l;
2079
2080         /* Only for specific case not bound all */
2081         asc = (struct sctp_asconf_iterator *)ptr;
2082         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2083                 ifa = l->ifa;
2084                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2085                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2086                             sctp_nxt_addr) {
2087                                 if (laddr->ifa == ifa) {
2088                                         laddr->action = 0;
2089                                         break;
2090                                 }
2091
2092                         }
2093                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2094                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2095                                 /* remove only after all guys are done */
2096                                 if (laddr->ifa == ifa) {
2097                                         sctp_del_local_addr_ep(inp, ifa);
2098                                 }
2099                         }
2100                 }
2101         }
2102         return (0);
2103 }
2104
2105 void
2106 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2107     void *ptr, uint32_t val SCTP_UNUSED)
2108 {
2109         struct sctp_asconf_iterator *asc;
2110         struct sctp_ifa *ifa;
2111         struct sctp_laddr *l;
2112         int cnt_invalid = 0;
2113         int type, status;
2114         int num_queued = 0;
2115
2116         asc = (struct sctp_asconf_iterator *)ptr;
2117         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2118                 ifa = l->ifa;
2119                 type = l->action;
2120
2121                 /* address's vrf_id must be the vrf_id of the assoc */
2122                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2123                         continue;
2124                 }
2125
2126                 /* Same checks again for assoc */
2127                 switch (ifa->address.sa.sa_family) {
2128 #ifdef INET6
2129                 case AF_INET6:
2130                         {
2131                                 /* invalid if we're not a v6 endpoint */
2132                                 struct sockaddr_in6 *sin6;
2133
2134                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2135                                         cnt_invalid++;
2136                                         if (asc->cnt == cnt_invalid)
2137                                                 return;
2138                                         else
2139                                                 continue;
2140                                 }
2141                                 sin6 = &ifa->address.sin6;
2142                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2143                                         /* we skip unspecifed addresses */
2144                                         continue;
2145                                 }
2146                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2147                                     &sin6->sin6_addr) != 0) {
2148                                         continue;
2149                                 }
2150                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2151                                         if (stcb->asoc.scope.local_scope == 0) {
2152                                                 continue;
2153                                         }
2154                                         /* is it the right link local scope? */
2155                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2156                                                 continue;
2157                                         }
2158                                 }
2159                                 break;
2160                         }
2161 #endif
2162 #ifdef INET
2163                 case AF_INET:
2164                         {
2165                                 /* invalid if we are a v6 only endpoint */
2166                                 struct sockaddr_in *sin;
2167
2168                                 /* invalid if we are a v6 only endpoint */
2169                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2170                                     SCTP_IPV6_V6ONLY(inp))
2171                                         continue;
2172
2173                                 sin = &ifa->address.sin;
2174                                 if (sin->sin_addr.s_addr == 0) {
2175                                         /* we skip unspecifed addresses */
2176                                         continue;
2177                                 }
2178                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2179                                     &sin->sin_addr) != 0) {
2180                                         continue;
2181                                 }
2182                                 if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2183                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2184                                         continue;
2185                                 }
2186                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2187                                     SCTP_IPV6_V6ONLY(inp)) {
2188                                         cnt_invalid++;
2189                                         if (asc->cnt == cnt_invalid)
2190                                                 return;
2191                                         else
2192                                                 continue;
2193                                 }
2194                                 break;
2195                         }
2196 #endif
2197                 default:
2198                         /* invalid address family */
2199                         cnt_invalid++;
2200                         if (asc->cnt == cnt_invalid)
2201                                 return;
2202                         else
2203                                 continue;
2204                         break;
2205                 }
2206
2207                 if (type == SCTP_ADD_IP_ADDRESS) {
2208                         /* prevent this address from being used as a source */
2209                         sctp_add_local_addr_restricted(stcb, ifa);
2210                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2211                         struct sctp_nets *net;
2212
2213                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2214                                 /* delete this address if cached */
2215                                 if (net->ro._s_addr == ifa) {
2216                                         sctp_free_ifa(net->ro._s_addr);
2217                                         net->ro._s_addr = NULL;
2218                                         net->src_addr_selected = 0;
2219                                         RO_NHFREE(&net->ro);
2220                                         /*
2221                                          * Now we deleted our src address,
2222                                          * should we not also now reset the
2223                                          * cwnd/rto to start as if its a new
2224                                          * address?
2225                                          */
2226                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2227                                         net->RTO = 0;
2228
2229                                 }
2230                         }
2231                 } else if (type == SCTP_SET_PRIM_ADDR) {
2232                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2233                                 /* must validate the ifa is in the ep */
2234                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2235                                         continue;
2236                                 }
2237                         } else {
2238                                 /* Need to check scopes for this guy */
2239                                 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2240                                         continue;
2241                                 }
2242                         }
2243                 }
2244                 /* queue an asconf for this address add/delete */
2245                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2246                     stcb->asoc.asconf_supported == 1) {
2247                         /* queue an asconf for this addr */
2248                         status = sctp_asconf_queue_add(stcb, ifa, type);
2249                         /*
2250                          * if queued ok, and in the open state, update the
2251                          * count of queued params.  If in the non-open
2252                          * state, these get sent when the assoc goes open.
2253                          */
2254                         if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2255                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2256                                 if (status >= 0) {
2257                                         num_queued++;
2258                                 }
2259                         }
2260                 }
2261         }
2262         /*
2263          * If we have queued params in the open state, send out an ASCONF.
2264          */
2265         if (num_queued > 0) {
2266                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2267         }
2268 }
2269
2270 void
2271 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2272 {
2273         struct sctp_asconf_iterator *asc;
2274         struct sctp_ifa *ifa;
2275         struct sctp_laddr *l, *nl;
2276
2277         asc = (struct sctp_asconf_iterator *)ptr;
2278         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2279                 ifa = l->ifa;
2280                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2281                         /* Clear the defer use flag */
2282                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2283                 }
2284                 sctp_free_ifa(ifa);
2285                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2286                 SCTP_DECR_LADDR_COUNT();
2287         }
2288         SCTP_FREE(asc, SCTP_M_ASC_IT);
2289 }
2290
2291 /*
2292  * sa is the sockaddr to ask the peer to set primary to.
2293  * returns: 0 = completed, -1 = error
2294  */
2295 int32_t
2296 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2297 {
2298         uint32_t vrf_id;
2299         struct sctp_ifa *ifa;
2300
2301         /* find the ifa for the desired set primary */
2302         vrf_id = stcb->asoc.vrf_id;
2303         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2304         if (ifa == NULL) {
2305                 /* Invalid address */
2306                 return (-1);
2307         }
2308
2309         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2310         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2311                 /* set primary queuing succeeded */
2312                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2313                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2314                     (void *)stcb);
2315                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2316                 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2317                     (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2318 #ifdef SCTP_TIMER_BASED_ASCONF
2319                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2320                             stcb->sctp_ep, stcb,
2321                             stcb->asoc.primary_destination);
2322 #else
2323                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2324 #endif
2325                 }
2326         } else {
2327                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2328                     (void *)stcb);
2329                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2330                 return (-1);
2331         }
2332         return (0);
2333 }
2334
2335 int
2336 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2337 {
2338         struct sctp_tmit_chunk *chk, *nchk;
2339         unsigned int offset, asconf_limit;
2340         struct sctp_asconf_chunk *acp;
2341         struct sctp_asconf_paramhdr *aph;
2342         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2343         struct sctp_paramhdr *ph;
2344         int add_cnt, del_cnt;
2345         uint16_t last_param_type;
2346
2347         add_cnt = del_cnt = 0;
2348         last_param_type = 0;
2349         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2350                 if (chk->data == NULL) {
2351                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2352                         continue;
2353                 }
2354                 offset = 0;
2355                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2356                 offset += sizeof(struct sctp_asconf_chunk);
2357                 asconf_limit = ntohs(acp->ch.chunk_length);
2358                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2359                 if (ph == NULL) {
2360                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2361                         continue;
2362                 }
2363                 offset += ntohs(ph->param_length);
2364
2365                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2366                 if (aph == NULL) {
2367                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2368                         continue;
2369                 }
2370                 while (aph != NULL) {
2371                         unsigned int param_length, param_type;
2372
2373                         param_type = ntohs(aph->ph.param_type);
2374                         param_length = ntohs(aph->ph.param_length);
2375                         if (offset + param_length > asconf_limit) {
2376                                 /* parameter goes beyond end of chunk! */
2377                                 break;
2378                         }
2379                         if (param_length > sizeof(aparam_buf)) {
2380                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2381                                 break;
2382                         }
2383                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2384                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2385                                 break;
2386                         }
2387
2388                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2389                         if (aph == NULL) {
2390                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2391                                 break;
2392                         }
2393
2394                         ph = (struct sctp_paramhdr *)(aph + 1);
2395                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2396                                 switch (param_type) {
2397                                 case SCTP_ADD_IP_ADDRESS:
2398                                         add_cnt++;
2399                                         break;
2400                                 case SCTP_DEL_IP_ADDRESS:
2401                                         del_cnt++;
2402                                         break;
2403                                 default:
2404                                         break;
2405                                 }
2406                                 last_param_type = param_type;
2407                         }
2408
2409                         offset += SCTP_SIZE32(param_length);
2410                         if (offset >= asconf_limit) {
2411                                 /* no more data in the mbuf chain */
2412                                 break;
2413                         }
2414                         /* get pointer to next asconf param */
2415                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2416                 }
2417         }
2418
2419         /*
2420          * we want to find the sequences which consist of ADD -> DEL -> ADD
2421          * or DEL -> ADD
2422          */
2423         if (add_cnt > del_cnt ||
2424             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2425                 return (1);
2426         }
2427         return (0);
2428 }
2429
2430 static struct sockaddr *
2431 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2432 {
2433         struct sctp_vrf *vrf = NULL;
2434         struct sctp_ifn *sctp_ifn;
2435         struct sctp_ifa *sctp_ifa;
2436
2437         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2438                 SCTP_IPI_ADDR_RLOCK();
2439         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2440         if (vrf == NULL) {
2441                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2442                         SCTP_IPI_ADDR_RUNLOCK();
2443                 return (NULL);
2444         }
2445         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2446                 if (stcb->asoc.scope.loopback_scope == 0 &&
2447                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2448                         /* Skip if loopback_scope not set */
2449                         continue;
2450                 }
2451                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2452                         switch (sctp_ifa->address.sa.sa_family) {
2453 #ifdef INET
2454                         case AF_INET:
2455                                 if (stcb->asoc.scope.ipv4_addr_legal) {
2456                                         struct sockaddr_in *sin;
2457
2458                                         sin = &sctp_ifa->address.sin;
2459                                         if (sin->sin_addr.s_addr == 0) {
2460                                                 /* skip unspecifed addresses */
2461                                                 continue;
2462                                         }
2463                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
2464                                             &sin->sin_addr) != 0) {
2465                                                 continue;
2466                                         }
2467                                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2468                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2469                                                 continue;
2470
2471                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2472                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2473                                                 continue;
2474                                         /*
2475                                          * found a valid local v4 address to
2476                                          * use
2477                                          */
2478                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2479                                                 SCTP_IPI_ADDR_RUNLOCK();
2480                                         return (&sctp_ifa->address.sa);
2481                                 }
2482                                 break;
2483 #endif
2484 #ifdef INET6
2485                         case AF_INET6:
2486                                 if (stcb->asoc.scope.ipv6_addr_legal) {
2487                                         struct sockaddr_in6 *sin6;
2488
2489                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2490                                                 continue;
2491                                         }
2492
2493                                         sin6 = &sctp_ifa->address.sin6;
2494                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2495                                                 /*
2496                                                  * we skip unspecifed
2497                                                  * addresses
2498                                                  */
2499                                                 continue;
2500                                         }
2501                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
2502                                             &sin6->sin6_addr) != 0) {
2503                                                 continue;
2504                                         }
2505                                         if (stcb->asoc.scope.local_scope == 0 &&
2506                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2507                                                 continue;
2508                                         if (stcb->asoc.scope.site_scope == 0 &&
2509                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2510                                                 continue;
2511
2512                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2513                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2514                                                 continue;
2515                                         /*
2516                                          * found a valid local v6 address to
2517                                          * use
2518                                          */
2519                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2520                                                 SCTP_IPI_ADDR_RUNLOCK();
2521                                         return (&sctp_ifa->address.sa);
2522                                 }
2523                                 break;
2524 #endif
2525                         default:
2526                                 break;
2527                         }
2528                 }
2529         }
2530         /* no valid addresses found */
2531         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2532                 SCTP_IPI_ADDR_RUNLOCK();
2533         return (NULL);
2534 }
2535
2536 static struct sockaddr *
2537 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2538 {
2539         struct sctp_laddr *laddr;
2540
2541         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2542                 if (laddr->ifa == NULL) {
2543                         continue;
2544                 }
2545                 /* is the address restricted ? */
2546                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2547                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2548                         continue;
2549
2550                 /* found a valid local address to use */
2551                 return (&laddr->ifa->address.sa);
2552         }
2553         /* no valid addresses found */
2554         return (NULL);
2555 }
2556
2557 /*
2558  * builds an ASCONF chunk from queued ASCONF params.
2559  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2560  */
2561 struct mbuf *
2562 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2563 {
2564         struct mbuf *m_asconf, *m_asconf_chk;
2565         struct sctp_asconf_addr *aa;
2566         struct sctp_asconf_chunk *acp;
2567         struct sctp_asconf_paramhdr *aph;
2568         struct sctp_asconf_addr_param *aap;
2569         uint32_t p_length;
2570         uint32_t correlation_id = 1;    /* 0 is reserved... */
2571         caddr_t ptr, lookup_ptr;
2572         uint8_t lookup_used = 0;
2573
2574         /* are there any asconf params to send? */
2575         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2576                 if (aa->sent == 0)
2577                         break;
2578         }
2579         if (aa == NULL)
2580                 return (NULL);
2581
2582         /*
2583          * get a chunk header mbuf and a cluster for the asconf params since
2584          * it's simpler to fill in the asconf chunk header lookup address on
2585          * the fly
2586          */
2587         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA);
2588         if (m_asconf_chk == NULL) {
2589                 /* no mbuf's */
2590                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2591                     "compose_asconf: couldn't get chunk mbuf!\n");
2592                 return (NULL);
2593         }
2594         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
2595         if (m_asconf == NULL) {
2596                 /* no mbuf's */
2597                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2598                     "compose_asconf: couldn't get mbuf!\n");
2599                 sctp_m_freem(m_asconf_chk);
2600                 return (NULL);
2601         }
2602         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2603         SCTP_BUF_LEN(m_asconf) = 0;
2604         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2605         memset(acp, 0, sizeof(struct sctp_asconf_chunk));
2606         /* save pointers to lookup address and asconf params */
2607         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2608         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2609
2610         /* fill in chunk header info */
2611         acp->ch.chunk_type = SCTP_ASCONF;
2612         acp->ch.chunk_flags = 0;
2613         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2614         stcb->asoc.asconf_seq_out++;
2615
2616         /* add parameters... up to smallest MTU allowed */
2617         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2618                 if (aa->sent)
2619                         continue;
2620                 /* get the parameter length */
2621                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2622                 /* will it fit in current chunk? */
2623                 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) ||
2624                     (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) {
2625                         /* won't fit, so we're done with this chunk */
2626                         break;
2627                 }
2628                 /* assign (and store) a correlation id */
2629                 aa->ap.aph.correlation_id = correlation_id++;
2630
2631                 /*
2632                  * fill in address if we're doing a delete this is a simple
2633                  * way for us to fill in the correlation address, which
2634                  * should only be used by the peer if we're deleting our
2635                  * source address and adding a new address (e.g. renumbering
2636                  * case)
2637                  */
2638                 if (lookup_used == 0 &&
2639                     (aa->special_del == 0) &&
2640                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2641                         struct sctp_ipv6addr_param *lookup;
2642                         uint16_t p_size, addr_size;
2643
2644                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2645                         lookup->ph.param_type =
2646                             htons(aa->ap.addrp.ph.param_type);
2647                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2648                                 /* copy IPv6 address */
2649                                 p_size = sizeof(struct sctp_ipv6addr_param);
2650                                 addr_size = sizeof(struct in6_addr);
2651                         } else {
2652                                 /* copy IPv4 address */
2653                                 p_size = sizeof(struct sctp_ipv4addr_param);
2654                                 addr_size = sizeof(struct in_addr);
2655                         }
2656                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2657                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2658                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2659                         lookup_used = 1;
2660                 }
2661                 /* copy into current space */
2662                 memcpy(ptr, &aa->ap, p_length);
2663
2664                 /* network elements and update lengths */
2665                 aph = (struct sctp_asconf_paramhdr *)ptr;
2666                 aap = (struct sctp_asconf_addr_param *)ptr;
2667                 /* correlation_id is transparent to peer, no htonl needed */
2668                 aph->ph.param_type = htons(aph->ph.param_type);
2669                 aph->ph.param_length = htons(aph->ph.param_length);
2670                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2671                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2672
2673                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2674                 ptr += SCTP_SIZE32(p_length);
2675
2676                 /*
2677                  * these params are removed off the pending list upon
2678                  * getting an ASCONF-ACK back from the peer, just set flag
2679                  */
2680                 aa->sent = 1;
2681         }
2682         /* check to see if the lookup addr has been populated yet */
2683         if (lookup_used == 0) {
2684                 /* NOTE: if the address param is optional, can skip this... */
2685                 /* add any valid (existing) address... */
2686                 struct sctp_ipv6addr_param *lookup;
2687                 uint16_t p_size, addr_size;
2688                 struct sockaddr *found_addr;
2689                 caddr_t addr_ptr;
2690
2691                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2692                         found_addr = sctp_find_valid_localaddr(stcb,
2693                             addr_locked);
2694                 else
2695                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2696
2697                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2698                 if (found_addr != NULL) {
2699                         switch (found_addr->sa_family) {
2700 #ifdef INET6
2701                         case AF_INET6:
2702                                 /* copy IPv6 address */
2703                                 lookup->ph.param_type =
2704                                     htons(SCTP_IPV6_ADDRESS);
2705                                 p_size = sizeof(struct sctp_ipv6addr_param);
2706                                 addr_size = sizeof(struct in6_addr);
2707                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2708                                     found_addr)->sin6_addr;
2709                                 break;
2710 #endif
2711 #ifdef INET
2712                         case AF_INET:
2713                                 /* copy IPv4 address */
2714                                 lookup->ph.param_type =
2715                                     htons(SCTP_IPV4_ADDRESS);
2716                                 p_size = sizeof(struct sctp_ipv4addr_param);
2717                                 addr_size = sizeof(struct in_addr);
2718                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2719                                     found_addr)->sin_addr;
2720                                 break;
2721 #endif
2722                         default:
2723                                 p_size = 0;
2724                                 addr_size = 0;
2725                                 addr_ptr = NULL;
2726                                 break;
2727                         }
2728                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2729                         memcpy(lookup->addr, addr_ptr, addr_size);
2730                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2731                 } else {
2732                         /* uh oh... don't have any address?? */
2733                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2734                             "compose_asconf: no lookup addr!\n");
2735                         /* XXX for now, we send a IPv4 address of 0.0.0.0 */
2736                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2737                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2738                         memset(lookup->addr, 0, sizeof(struct in_addr));
2739                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2740                 }
2741         }
2742         /* chain it all together */
2743         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2744         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2745         acp->ch.chunk_length = htons(*retlen);
2746
2747         return (m_asconf_chk);
2748 }
2749
2750 /*
2751  * section to handle address changes before an association is up eg. changes
2752  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2753  */
2754
2755 /*
2756  * processes the (local) addresses in the INIT-ACK chunk
2757  */
2758 static void
2759 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2760     unsigned int offset, unsigned int length)
2761 {
2762         struct sctp_paramhdr tmp_param, *ph;
2763         uint16_t plen, ptype;
2764         struct sctp_ifa *sctp_ifa;
2765         union sctp_sockstore store;
2766 #ifdef INET6
2767         struct sctp_ipv6addr_param addr6_store;
2768 #endif
2769 #ifdef INET
2770         struct sctp_ipv4addr_param addr4_store;
2771 #endif
2772
2773         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2774         if (stcb == NULL)       /* Un-needed check for SA */
2775                 return;
2776
2777         /* convert to upper bound */
2778         length += offset;
2779
2780         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2781                 return;
2782         }
2783         /* go through the addresses in the init-ack */
2784         ph = (struct sctp_paramhdr *)
2785             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2786             (uint8_t *)&tmp_param);
2787         while (ph != NULL) {
2788                 ptype = ntohs(ph->param_type);
2789                 plen = ntohs(ph->param_length);
2790                 switch (ptype) {
2791 #ifdef INET6
2792                 case SCTP_IPV6_ADDRESS:
2793                         {
2794                                 struct sctp_ipv6addr_param *a6p;
2795
2796                                 /* get the entire IPv6 address param */
2797                                 a6p = (struct sctp_ipv6addr_param *)
2798                                     sctp_m_getptr(m, offset,
2799                                     sizeof(struct sctp_ipv6addr_param),
2800                                     (uint8_t *)&addr6_store);
2801                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2802                                     a6p == NULL) {
2803                                         return;
2804                                 }
2805                                 memset(&store, 0, sizeof(union sctp_sockstore));
2806                                 store.sin6.sin6_family = AF_INET6;
2807                                 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2808                                 store.sin6.sin6_port = stcb->rport;
2809                                 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr));
2810                                 break;
2811                         }
2812 #endif
2813 #ifdef INET
2814                 case SCTP_IPV4_ADDRESS:
2815                         {
2816                                 struct sctp_ipv4addr_param *a4p;
2817
2818                                 /* get the entire IPv4 address param */
2819                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2820                                     sizeof(struct sctp_ipv4addr_param),
2821                                     (uint8_t *)&addr4_store);
2822                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2823                                     a4p == NULL) {
2824                                         return;
2825                                 }
2826                                 memset(&store, 0, sizeof(union sctp_sockstore));
2827                                 store.sin.sin_family = AF_INET;
2828                                 store.sin.sin_len = sizeof(struct sockaddr_in);
2829                                 store.sin.sin_port = stcb->rport;
2830                                 store.sin.sin_addr.s_addr = a4p->addr;
2831                                 break;
2832                         }
2833 #endif
2834                 default:
2835                         goto next_addr;
2836                 }
2837
2838                 /* see if this address really (still) exists */
2839                 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id,
2840                     SCTP_ADDR_NOT_LOCKED);
2841                 if (sctp_ifa == NULL) {
2842                         /* address doesn't exist anymore */
2843                         int status;
2844
2845                         /* are ASCONFs allowed ? */
2846                         if ((sctp_is_feature_on(stcb->sctp_ep,
2847                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2848                             stcb->asoc.asconf_supported) {
2849                                 /* queue an ASCONF DEL_IP_ADDRESS */
2850                                 status = sctp_asconf_queue_sa_delete(stcb, &store.sa);
2851                                 /*
2852                                  * if queued ok, and in correct state, send
2853                                  * out the ASCONF.
2854                                  */
2855                                 if (status == 0 &&
2856                                     SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
2857 #ifdef SCTP_TIMER_BASED_ASCONF
2858                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2859                                             stcb->sctp_ep, stcb,
2860                                             stcb->asoc.primary_destination);
2861 #else
2862                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2863 #endif
2864                                 }
2865                         }
2866                 }
2867
2868 next_addr:
2869                 /*
2870                  * Sanity check:  Make sure the length isn't 0, otherwise
2871                  * we'll be stuck in this loop for a long time...
2872                  */
2873                 if (SCTP_SIZE32(plen) == 0) {
2874                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2875                             plen, ptype);
2876                         return;
2877                 }
2878                 /* get next parameter */
2879                 offset += SCTP_SIZE32(plen);
2880                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2881                         return;
2882                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2883                     sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2884         }                       /* while */
2885 }
2886
2887 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2888 /*
2889  * checks to see if a specific address is in the initack address list returns
2890  * 1 if found, 0 if not
2891  */
2892 static uint32_t
2893 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
2894 {
2895         struct sctp_paramhdr tmp_param, *ph;
2896         uint16_t plen, ptype;
2897 #ifdef INET
2898         struct sockaddr_in *sin;
2899         struct sctp_ipv4addr_param *a4p;
2900         struct sctp_ipv6addr_param addr4_store;
2901 #endif
2902 #ifdef INET6
2903         struct sockaddr_in6 *sin6;
2904         struct sctp_ipv6addr_param *a6p;
2905         struct sctp_ipv6addr_param addr6_store;
2906         struct sockaddr_in6 sin6_tmp;
2907 #endif
2908
2909         switch (sa->sa_family) {
2910 #ifdef INET
2911         case AF_INET:
2912                 break;
2913 #endif
2914 #ifdef INET6
2915         case AF_INET6:
2916                 break;
2917 #endif
2918         default:
2919                 return (0);
2920         }
2921
2922         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2923         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2924         /* convert to upper bound */
2925         length += offset;
2926
2927         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2928                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2929                     "find_initack_addr: invalid offset?\n");
2930                 return (0);
2931         }
2932         /* go through the addresses in the init-ack */
2933         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2934             sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2935         while (ph != NULL) {
2936                 ptype = ntohs(ph->param_type);
2937                 plen = ntohs(ph->param_length);
2938                 switch (ptype) {
2939 #ifdef INET6
2940                 case SCTP_IPV6_ADDRESS:
2941                         if (sa->sa_family == AF_INET6) {
2942                                 /* get the entire IPv6 address param */
2943                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
2944                                         break;
2945                                 }
2946                                 /* get the entire IPv6 address param */
2947                                 a6p = (struct sctp_ipv6addr_param *)
2948                                     sctp_m_getptr(m, offset,
2949                                     sizeof(struct sctp_ipv6addr_param),
2950                                     (uint8_t *)&addr6_store);
2951                                 if (a6p == NULL) {
2952                                         return (0);
2953                                 }
2954                                 sin6 = (struct sockaddr_in6 *)sa;
2955                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2956                                         /* create a copy and clear scope */
2957                                         memcpy(&sin6_tmp, sin6,
2958                                             sizeof(struct sockaddr_in6));
2959                                         sin6 = &sin6_tmp;
2960                                         in6_clearscope(&sin6->sin6_addr);
2961                                 }
2962                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
2963                                     sizeof(struct in6_addr)) == 0) {
2964                                         /* found it */
2965                                         return (1);
2966                                 }
2967                         }
2968                         break;
2969 #endif                          /* INET6 */
2970 #ifdef INET
2971                 case SCTP_IPV4_ADDRESS:
2972                         if (sa->sa_family == AF_INET) {
2973                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
2974                                         break;
2975                                 }
2976                                 /* get the entire IPv4 address param */
2977                                 a4p = (struct sctp_ipv4addr_param *)
2978                                     sctp_m_getptr(m, offset,
2979                                     sizeof(struct sctp_ipv4addr_param),
2980                                     (uint8_t *)&addr4_store);
2981                                 if (a4p == NULL) {
2982                                         return (0);
2983                                 }
2984                                 sin = (struct sockaddr_in *)sa;
2985                                 if (sin->sin_addr.s_addr == a4p->addr) {
2986                                         /* found it */
2987                                         return (1);
2988                                 }
2989                         }
2990                         break;
2991 #endif
2992                 default:
2993                         break;
2994                 }
2995                 /* get next parameter */
2996                 offset += SCTP_SIZE32(plen);
2997                 if (offset + sizeof(struct sctp_paramhdr) > length) {
2998                         return (0);
2999                 }
3000                 ph = (struct sctp_paramhdr *)
3001                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
3002                     (uint8_t *)&tmp_param);
3003         }                       /* while */
3004         /* not found! */
3005         return (0);
3006 }
3007
3008 /*
3009  * makes sure that the current endpoint local addr list is consistent with
3010  * the new association (eg. subset bound, asconf allowed) adds addresses as
3011  * necessary
3012  */
3013 static void
3014 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3015     int length, struct sockaddr *init_addr)
3016 {
3017         struct sctp_laddr *laddr;
3018
3019         /* go through the endpoint list */
3020         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3021                 /* be paranoid and validate the laddr */
3022                 if (laddr->ifa == NULL) {
3023                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3024                             "check_addr_list_ep: laddr->ifa is NULL");
3025                         continue;
3026                 }
3027                 /* do i have it implicitly? */
3028                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3029                         continue;
3030                 }
3031                 /* check to see if in the init-ack */
3032                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3033                         /* try to add it */
3034                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3035                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3036                 }
3037         }
3038 }
3039
3040 /*
3041  * makes sure that the current kernel address list is consistent with the new
3042  * association (with all addrs bound) adds addresses as necessary
3043  */
3044 static void
3045 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3046     int length, struct sockaddr *init_addr,
3047     uint16_t local_scope, uint16_t site_scope,
3048     uint16_t ipv4_scope, uint16_t loopback_scope)
3049 {
3050         struct sctp_vrf *vrf = NULL;
3051         struct sctp_ifn *sctp_ifn;
3052         struct sctp_ifa *sctp_ifa;
3053         uint32_t vrf_id;
3054 #ifdef INET
3055         struct sockaddr_in *sin;
3056 #endif
3057 #ifdef INET6
3058         struct sockaddr_in6 *sin6;
3059 #endif
3060
3061         if (stcb) {
3062                 vrf_id = stcb->asoc.vrf_id;
3063         } else {
3064                 return;
3065         }
3066         SCTP_IPI_ADDR_RLOCK();
3067         vrf = sctp_find_vrf(vrf_id);
3068         if (vrf == NULL) {
3069                 SCTP_IPI_ADDR_RUNLOCK();
3070                 return;
3071         }
3072         /* go through all our known interfaces */
3073         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3074                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3075                         /* skip loopback interface */
3076                         continue;
3077                 }
3078                 /* go through each interface address */
3079                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3080                         /* do i have it implicitly? */
3081                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3082                                 continue;
3083                         }
3084                         switch (sctp_ifa->address.sa.sa_family) {
3085 #ifdef INET
3086                         case AF_INET:
3087                                 sin = &sctp_ifa->address.sin;
3088                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3089                                     &sin->sin_addr) != 0) {
3090                                         continue;
3091                                 }
3092                                 if ((ipv4_scope == 0) &&
3093                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3094                                         /* private address not in scope */
3095                                         continue;
3096                                 }
3097                                 break;
3098 #endif
3099 #ifdef INET6
3100                         case AF_INET6:
3101                                 sin6 = &sctp_ifa->address.sin6;
3102                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3103                                     &sin6->sin6_addr) != 0) {
3104                                         continue;
3105                                 }
3106                                 if ((local_scope == 0) &&
3107                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3108                                         continue;
3109                                 }
3110                                 if ((site_scope == 0) &&
3111                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3112                                         continue;
3113                                 }
3114                                 break;
3115 #endif
3116                         default:
3117                                 break;
3118                         }
3119                         /* check to see if in the init-ack */
3120                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3121                                 /* try to add it */
3122                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3123                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3124                                     SCTP_ADDR_LOCKED);
3125                         }
3126                 }               /* end foreach ifa */
3127         }                       /* end foreach ifn */
3128         SCTP_IPI_ADDR_RUNLOCK();
3129 }
3130
3131 /*
3132  * validates an init-ack chunk (from a cookie-echo) with current addresses
3133  * adds addresses from the init-ack into our local address list, if needed
3134  * queues asconf adds/deletes addresses as needed and makes appropriate list
3135  * changes for source address selection m, offset: points to the start of the
3136  * address list in an init-ack chunk length: total length of the address
3137  * params only init_addr: address where my INIT-ACK was sent from
3138  */
3139 void
3140 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3141     int length, struct sockaddr *init_addr,
3142     uint16_t local_scope, uint16_t site_scope,
3143     uint16_t ipv4_scope, uint16_t loopback_scope)
3144 {
3145         /* process the local addresses in the initack */
3146         sctp_process_initack_addresses(stcb, m, offset, length);
3147
3148         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3149                 /* bound all case */
3150                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3151                     local_scope, site_scope, ipv4_scope, loopback_scope);
3152         } else {
3153                 /* subset bound case */
3154                 if (sctp_is_feature_on(stcb->sctp_ep,
3155                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3156                         /* asconf's allowed */
3157                         sctp_check_address_list_ep(stcb, m, offset, length,
3158                             init_addr);
3159                 }
3160                 /* else, no asconfs allowed, so what we sent is what we get */
3161         }
3162 }
3163
3164 /*
3165  * sctp_bindx() support
3166  */
3167 uint32_t
3168 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3169     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3170 {
3171         struct sctp_ifa *ifa;
3172         struct sctp_laddr *laddr, *nladdr;
3173
3174         if (sa->sa_len == 0) {
3175                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3176                 return (EINVAL);
3177         }
3178         if (sctp_ifap) {
3179                 ifa = sctp_ifap;
3180         } else if (type == SCTP_ADD_IP_ADDRESS) {
3181                 /* For an add the address MUST be on the system */
3182                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3183         } else if (type == SCTP_DEL_IP_ADDRESS) {
3184                 /* For a delete we need to find it in the inp */
3185                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3186         } else {
3187                 ifa = NULL;
3188         }
3189         if (ifa != NULL) {
3190                 if (type == SCTP_ADD_IP_ADDRESS) {
3191                         sctp_add_local_addr_ep(inp, ifa, type);
3192                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3193                         if (inp->laddr_count < 2) {
3194                                 /* can't delete the last local address */
3195                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3196                                 return (EINVAL);
3197                         }
3198                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3199                             sctp_nxt_addr) {
3200                                 if (ifa == laddr->ifa) {
3201                                         /* Mark in the delete */
3202                                         laddr->action = type;
3203                                 }
3204                         }
3205                 }
3206                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3207                         /*
3208                          * There is no need to start the iterator if the inp
3209                          * has no associations.
3210                          */
3211                         if (type == SCTP_DEL_IP_ADDRESS) {
3212                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3213                                         if (laddr->ifa == ifa) {
3214                                                 sctp_del_local_addr_ep(inp, ifa);
3215                                         }
3216                                 }
3217                         }
3218                 } else {
3219                         struct sctp_asconf_iterator *asc;
3220                         struct sctp_laddr *wi;
3221                         int ret;
3222
3223                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3224                             sizeof(struct sctp_asconf_iterator),
3225                             SCTP_M_ASC_IT);
3226                         if (asc == NULL) {
3227                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3228                                 return (ENOMEM);
3229                         }
3230                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3231                         if (wi == NULL) {
3232                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3233                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3234                                 return (ENOMEM);
3235                         }
3236                         LIST_INIT(&asc->list_of_work);
3237                         asc->cnt = 1;
3238                         SCTP_INCR_LADDR_COUNT();
3239                         wi->ifa = ifa;
3240                         wi->action = type;
3241                         atomic_add_int(&ifa->refcount, 1);
3242                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3243                         ret = sctp_initiate_iterator(sctp_asconf_iterator_ep,
3244                             sctp_asconf_iterator_stcb,
3245                             sctp_asconf_iterator_ep_end,
3246                             SCTP_PCB_ANY_FLAGS,
3247                             SCTP_PCB_ANY_FEATURES,
3248                             SCTP_ASOC_ANY_STATE,
3249                             (void *)asc, 0,
3250                             sctp_asconf_iterator_end, inp, 0);
3251                         if (ret) {
3252                                 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n");
3253                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT);
3254                                 sctp_asconf_iterator_end(asc, 0);
3255                                 return (EFAULT);
3256                         }
3257                 }
3258                 return (0);
3259         } else {
3260                 /* invalid address! */
3261                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3262                 return (EADDRNOTAVAIL);
3263         }
3264 }
3265
3266 void
3267 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3268     struct sctp_nets *net)
3269 {
3270         struct sctp_asconf_addr *aa;
3271         struct sctp_ifa *sctp_ifap;
3272         struct sctp_asconf_tag_param *vtag;
3273 #ifdef INET
3274         struct sockaddr_in *to;
3275 #endif
3276 #ifdef INET6
3277         struct sockaddr_in6 *to6;
3278 #endif
3279         if (net == NULL) {
3280                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3281                 return;
3282         }
3283         if (stcb == NULL) {
3284                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3285                 return;
3286         }
3287         /*
3288          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3289          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3290          */
3291         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3292             SCTP_M_ASC_ADDR);
3293         if (aa == NULL) {
3294                 /* didn't get memory */
3295                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3296                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3297                 return;
3298         }
3299         aa->special_del = 0;
3300         /* fill in asconf address parameter fields */
3301         /* top level elements are "networked" during send */
3302         aa->ifa = NULL;
3303         aa->sent = 0;           /* clear sent flag */
3304         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3305         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3306         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3307         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3308         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3309         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3310
3311         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3312             SCTP_M_ASC_ADDR);
3313         if (aa == NULL) {
3314                 /* didn't get memory */
3315                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3316                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3317                 return;
3318         }
3319         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3320         /* fill in asconf address parameter fields */
3321         /* ADD(0.0.0.0) */
3322         switch (net->ro._l_addr.sa.sa_family) {
3323 #ifdef INET
3324         case AF_INET:
3325                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3326                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3327                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3328                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3329                 /* No need to add an address, we are using 0.0.0.0 */
3330                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3331                 break;
3332 #endif
3333 #ifdef INET6
3334         case AF_INET6:
3335                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3336                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3337                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3338                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3339                 /* No need to add an address, we are using 0.0.0.0 */
3340                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3341                 break;
3342 #endif
3343         default:
3344                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3345                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3346                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3347                 return;
3348         }
3349         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3350             SCTP_M_ASC_ADDR);
3351         if (aa == NULL) {
3352                 /* didn't get memory */
3353                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3354                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3355                 return;
3356         }
3357         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3358         /* fill in asconf address parameter fields */
3359         /* ADD(0.0.0.0) */
3360         switch (net->ro._l_addr.sa.sa_family) {
3361 #ifdef INET
3362         case AF_INET:
3363                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3364                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3365                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3366                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3367                 /* No need to add an address, we are using 0.0.0.0 */
3368                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3369                 break;
3370 #endif
3371 #ifdef INET6
3372         case AF_INET6:
3373                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3374                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3375                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3376                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3377                 /* No need to add an address, we are using 0.0.0.0 */
3378                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3379                 break;
3380 #endif
3381         default:
3382                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3383                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3384                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3385                 return;
3386         }
3387         /* Now we must hunt the addresses and add all global addresses */
3388         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3389                 struct sctp_vrf *vrf = NULL;
3390                 struct sctp_ifn *sctp_ifnp;
3391                 uint32_t vrf_id;
3392
3393                 vrf_id = stcb->sctp_ep->def_vrf_id;
3394                 vrf = sctp_find_vrf(vrf_id);
3395                 if (vrf == NULL) {
3396                         goto skip_rest;
3397                 }
3398
3399                 SCTP_IPI_ADDR_RLOCK();
3400                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3401                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3402                                 switch (sctp_ifap->address.sa.sa_family) {
3403 #ifdef INET
3404                                 case AF_INET:
3405                                         to = &sctp_ifap->address.sin;
3406                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3407                                             &to->sin_addr) != 0) {
3408                                                 continue;
3409                                         }
3410                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3411                                                 continue;
3412                                         }
3413                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3414                                                 continue;
3415                                         }
3416                                         break;
3417 #endif
3418 #ifdef INET6
3419                                 case AF_INET6:
3420                                         to6 = &sctp_ifap->address.sin6;
3421                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3422                                             &to6->sin6_addr) != 0) {
3423                                                 continue;
3424                                         }
3425                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3426                                                 continue;
3427                                         }
3428                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3429                                                 continue;
3430                                         }
3431                                         break;
3432 #endif
3433                                 default:
3434                                         continue;
3435                                 }
3436                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3437                         }
3438                 }
3439                 SCTP_IPI_ADDR_RUNLOCK();
3440         } else {
3441                 struct sctp_laddr *laddr;
3442
3443                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3444                         if (laddr->ifa == NULL) {
3445                                 continue;
3446                         }
3447                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3448                                 /*
3449                                  * Address being deleted by the system, dont
3450                                  * list.
3451                                  */
3452                                 continue;
3453                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3454                                 /*
3455                                  * Address being deleted on this ep don't
3456                                  * list.
3457                                  */
3458                                 continue;
3459                         }
3460                         sctp_ifap = laddr->ifa;
3461                         switch (sctp_ifap->address.sa.sa_family) {
3462 #ifdef INET
3463                         case AF_INET:
3464                                 to = &sctp_ifap->address.sin;
3465                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3466                                         continue;
3467                                 }
3468                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3469                                         continue;
3470                                 }
3471                                 break;
3472 #endif
3473 #ifdef INET6
3474                         case AF_INET6:
3475                                 to6 = &sctp_ifap->address.sin6;
3476                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3477                                         continue;
3478                                 }
3479                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3480                                         continue;
3481                                 }
3482                                 break;
3483 #endif
3484                         default:
3485                                 continue;
3486                         }
3487                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3488                 }
3489         }
3490 skip_rest:
3491         /* Now we must send the asconf into the queue */
3492         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3493 }