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                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1036                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1037                             stcb, chk->whoTo);
1038                 }
1039         }
1040         return;
1041 }
1042
1043 static int
1044     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1045
1046 void
1047 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1048 {
1049         struct sctp_tmit_chunk *chk;
1050
1051         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1052         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1053             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4);
1054         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1055         net->error_count = 0;
1056         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1057                 if (chk->whoTo == net) {
1058                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1059                                 chk->sent = SCTP_DATAGRAM_RESEND;
1060                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1061                                 sctp_flight_size_decrease(chk);
1062                                 sctp_total_flight_decrease(stcb, chk);
1063                                 net->marked_retrans++;
1064                                 stcb->asoc.marked_retrans++;
1065                         }
1066                 }
1067         }
1068         if (net->marked_retrans) {
1069                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1070         }
1071 }
1072
1073 static void
1074 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1075 {
1076         struct sctp_nets *net;
1077         int addrnum, changed;
1078
1079         /*
1080          * If number of local valid addresses is 1, the valid address is
1081          * probably newly added address. Several valid addresses in this
1082          * association.  A source address may not be changed.  Additionally,
1083          * they can be configured on a same interface as "alias" addresses.
1084          * (by micchie)
1085          */
1086         addrnum = sctp_local_addr_count(stcb);
1087         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1088             addrnum);
1089         if (addrnum == 1) {
1090                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1091                         /* clear any cached route and source address */
1092                         RO_NHFREE(&net->ro);
1093                         if (net->src_addr_selected) {
1094                                 sctp_free_ifa(net->ro._s_addr);
1095                                 net->ro._s_addr = NULL;
1096                                 net->src_addr_selected = 0;
1097                         }
1098                         /* Retransmit unacknowledged DATA chunks immediately */
1099                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1100                             SCTP_MOBILITY_FASTHANDOFF)) {
1101                                 sctp_net_immediate_retrans(stcb, net);
1102                         }
1103                         /* also, SET PRIMARY is maybe already sent */
1104                 }
1105                 return;
1106         }
1107
1108         /* Multiple local addresses exsist in the association.  */
1109         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1110                 /* clear any cached route and source address */
1111                 RO_NHFREE(&net->ro);
1112                 if (net->src_addr_selected) {
1113                         sctp_free_ifa(net->ro._s_addr);
1114                         net->ro._s_addr = NULL;
1115                         net->src_addr_selected = 0;
1116                 }
1117                 /*
1118                  * Check if the nexthop is corresponding to the new address.
1119                  * If the new address is corresponding to the current
1120                  * nexthop, the path will be changed. If the new address is
1121                  * NOT corresponding to the current nexthop, the path will
1122                  * not be changed.
1123                  */
1124                 SCTP_RTALLOC((sctp_route_t *)&net->ro,
1125                     stcb->sctp_ep->def_vrf_id,
1126                     stcb->sctp_ep->fibnum);
1127                 if (net->ro.ro_nh == NULL)
1128                         continue;
1129
1130                 changed = 0;
1131                 switch (net->ro._l_addr.sa.sa_family) {
1132 #ifdef INET
1133                 case AF_INET:
1134                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) {
1135                                 changed = 1;
1136                         }
1137                         break;
1138 #endif
1139 #ifdef INET6
1140                 case AF_INET6:
1141                         if (sctp_v6src_match_nexthop(
1142                             &newifa->address.sin6, (sctp_route_t *)&net->ro)) {
1143                                 changed = 1;
1144                         }
1145                         break;
1146 #endif
1147                 default:
1148                         break;
1149                 }
1150                 /*
1151                  * if the newly added address does not relate routing
1152                  * information, we skip.
1153                  */
1154                 if (changed == 0)
1155                         continue;
1156                 /* Retransmit unacknowledged DATA chunks immediately */
1157                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1158                     SCTP_MOBILITY_FASTHANDOFF)) {
1159                         sctp_net_immediate_retrans(stcb, net);
1160                 }
1161                 /* Send SET PRIMARY for this new address */
1162                 if (net == stcb->asoc.primary_destination) {
1163                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1164                             SCTP_SET_PRIM_ADDR);
1165                 }
1166         }
1167 }
1168
1169 /*
1170  * process an ADD/DELETE IP ack from peer.
1171  * addr: corresponding sctp_ifa to the address being added/deleted.
1172  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1173  * flag: 1=success, 0=failure.
1174  */
1175 static void
1176 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1177 {
1178         /*
1179          * do the necessary asoc list work- if we get a failure indication,
1180          * leave the address on the assoc's restricted list.  If we get a
1181          * success indication, remove the address from the restricted list.
1182          */
1183         /*
1184          * Note: this will only occur for ADD_IP_ADDRESS, since
1185          * DEL_IP_ADDRESS is never actually added to the list...
1186          */
1187         if (flag) {
1188                 /* success case, so remove from the restricted list */
1189                 sctp_del_local_addr_restricted(stcb, addr);
1190
1191                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1192                     SCTP_MOBILITY_BASE) ||
1193                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1194                     SCTP_MOBILITY_FASTHANDOFF)) {
1195                         sctp_path_check_and_react(stcb, addr);
1196                         return;
1197                 }
1198                 /* clear any cached/topologically incorrect source addresses */
1199                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1200         }
1201         /* else, leave it on the list */
1202 }
1203
1204 /*
1205  * add an asconf add/delete/set primary IP address parameter to the queue.
1206  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1207  * returns 0 if queued, -1 if not queued/removed.
1208  * NOTE: if adding, but a delete for the same address is already scheduled
1209  * (and not yet sent out), simply remove it from queue.  Same for deleting
1210  * an address already scheduled for add.  If a duplicate operation is found,
1211  * ignore the new one.
1212  */
1213 static int
1214 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1215     uint16_t type)
1216 {
1217         struct sctp_asconf_addr *aa, *aa_next;
1218
1219         /* make sure the request isn't already in the queue */
1220         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1221                 /* address match? */
1222                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1223                         continue;
1224                 /*
1225                  * is the request already in queue but not sent? pass the
1226                  * request already sent in order to resolve the following
1227                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1228                  * can't remove the ADD request already sent 3. arrival of
1229                  * ADD
1230                  */
1231                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1232                         return (-1);
1233                 }
1234                 /* is the negative request already in queue, and not sent */
1235                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1236                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1237                         /* add requested, delete already queued */
1238                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1239                         /* remove the ifa from the restricted list */
1240                         sctp_del_local_addr_restricted(stcb, ifa);
1241                         /* free the asconf param */
1242                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1243                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1244                         return (-1);
1245                 }
1246                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1247                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1248                         /* delete requested, add already queued */
1249                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1250                         /* remove the aa->ifa from the restricted list */
1251                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1252                         /* free the asconf param */
1253                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1254                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1255                         return (-1);
1256                 }
1257         }                       /* for each aa */
1258
1259         /* adding new request to the queue */
1260         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1261             SCTP_M_ASC_ADDR);
1262         if (aa == NULL) {
1263                 /* didn't get memory */
1264                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1265                 return (-1);
1266         }
1267         aa->special_del = 0;
1268         /* fill in asconf address parameter fields */
1269         /* top level elements are "networked" during send */
1270         aa->ap.aph.ph.param_type = type;
1271         aa->ifa = ifa;
1272         atomic_add_int(&ifa->refcount, 1);
1273         /* correlation_id filled in during send routine later... */
1274         switch (ifa->address.sa.sa_family) {
1275 #ifdef INET6
1276         case AF_INET6:
1277                 {
1278                         struct sockaddr_in6 *sin6;
1279
1280                         sin6 = &ifa->address.sin6;
1281                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1282                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1283                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1284                             sizeof(struct sctp_ipv6addr_param);
1285                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1286                             sizeof(struct in6_addr));
1287                         break;
1288                 }
1289 #endif
1290 #ifdef INET
1291         case AF_INET:
1292                 {
1293                         struct sockaddr_in *sin;
1294
1295                         sin = &ifa->address.sin;
1296                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1297                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1298                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1299                             sizeof(struct sctp_ipv4addr_param);
1300                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1301                             sizeof(struct in_addr));
1302                         break;
1303                 }
1304 #endif
1305         default:
1306                 /* invalid family! */
1307                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1308                 sctp_free_ifa(ifa);
1309                 return (-1);
1310         }
1311         aa->sent = 0;           /* clear sent flag */
1312
1313         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1314 #ifdef SCTP_DEBUG
1315         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1316                 if (type == SCTP_ADD_IP_ADDRESS) {
1317                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1318                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1319                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1320                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1321                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1322                 } else {
1323                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1324                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1325                 }
1326         }
1327 #endif
1328
1329         return (0);
1330 }
1331
1332
1333 /*
1334  * add an asconf operation for the given ifa and type.
1335  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1336  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1337  * advisable.
1338  */
1339 static int
1340 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1341     uint16_t type)
1342 {
1343         uint32_t status;
1344         int pending_delete_queued = 0;
1345         int last;
1346
1347         /* see if peer supports ASCONF */
1348         if (stcb->asoc.asconf_supported == 0) {
1349                 return (-1);
1350         }
1351
1352         /*
1353          * if this is deleting the last address from the assoc, mark it as
1354          * pending.
1355          */
1356         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) {
1357                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1358                         last = (sctp_local_addr_count(stcb) == 0);
1359                 } else {
1360                         last = (sctp_local_addr_count(stcb) == 1);
1361                 }
1362                 if (last) {
1363                         /* set the pending delete info only */
1364                         stcb->asoc.asconf_del_pending = 1;
1365                         stcb->asoc.asconf_addr_del_pending = ifa;
1366                         atomic_add_int(&ifa->refcount, 1);
1367                         SCTPDBG(SCTP_DEBUG_ASCONF2,
1368                             "asconf_queue_add: mark delete last address pending\n");
1369                         return (-1);
1370                 }
1371         }
1372
1373         /* queue an asconf parameter */
1374         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1375
1376         /*
1377          * if this is an add, and there is a delete also pending (i.e. the
1378          * last local address is being changed), queue the pending delete
1379          * too.
1380          */
1381         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1382                 /* queue in the pending delete */
1383                 if (sctp_asconf_queue_mgmt(stcb,
1384                     stcb->asoc.asconf_addr_del_pending,
1385                     SCTP_DEL_IP_ADDRESS) == 0) {
1386                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n");
1387                         pending_delete_queued = 1;
1388                         /* clear out the pending delete info */
1389                         stcb->asoc.asconf_del_pending = 0;
1390                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1391                         stcb->asoc.asconf_addr_del_pending = NULL;
1392                 }
1393         }
1394
1395         if (pending_delete_queued) {
1396                 struct sctp_nets *net;
1397
1398                 /*
1399                  * since we know that the only/last address is now being
1400                  * changed in this case, reset the cwnd/rto on all nets to
1401                  * start as a new address and path.  Also clear the error
1402                  * counts to give the assoc the best chance to complete the
1403                  * address change.
1404                  */
1405                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1406                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1407                             net);
1408                         net->RTO = 0;
1409                         net->error_count = 0;
1410                 }
1411                 stcb->asoc.overall_error_count = 0;
1412                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1413                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1414                             stcb->asoc.overall_error_count,
1415                             0,
1416                             SCTP_FROM_SCTP_ASCONF,
1417                             __LINE__);
1418                 }
1419
1420                 /* queue in an advisory set primary too */
1421                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1422                 /* let caller know we should send this out immediately */
1423                 status = 1;
1424         }
1425         return (status);
1426 }
1427
1428 /*-
1429  * add an asconf delete IP address parameter to the queue by sockaddr and
1430  * possibly with no sctp_ifa available.  This is only called by the routine
1431  * that checks the addresses in an INIT-ACK against the current address list.
1432  * returns 0 if completed, non-zero if not completed.
1433  * NOTE: if an add is already scheduled (and not yet sent out), simply
1434  * remove it from queue.  If a duplicate operation is found, ignore the
1435  * new one.
1436  */
1437 static int
1438 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1439 {
1440         struct sctp_ifa *ifa;
1441         struct sctp_asconf_addr *aa, *aa_next;
1442
1443         if (stcb == NULL) {
1444                 return (-1);
1445         }
1446         /* see if peer supports ASCONF */
1447         if (stcb->asoc.asconf_supported == 0) {
1448                 return (-1);
1449         }
1450         /* make sure the request isn't already in the queue */
1451         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1452                 /* address match? */
1453                 if (sctp_asconf_addr_match(aa, sa) == 0)
1454                         continue;
1455                 /* is the request already in queue (sent or not) */
1456                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1457                         return (-1);
1458                 }
1459                 /* is the negative request already in queue, and not sent */
1460                 if (aa->sent == 1)
1461                         continue;
1462                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1463                         /* add already queued, so remove existing entry */
1464                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1465                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1466                         /* free the entry */
1467                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1468                         return (-1);
1469                 }
1470         }                       /* for each aa */
1471
1472         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1473         ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED);
1474
1475         /* adding new request to the queue */
1476         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1477             SCTP_M_ASC_ADDR);
1478         if (aa == NULL) {
1479                 /* didn't get memory */
1480                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1481                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1482                 return (-1);
1483         }
1484         aa->special_del = 0;
1485         /* fill in asconf address parameter fields */
1486         /* top level elements are "networked" during send */
1487         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1488         aa->ifa = ifa;
1489         if (ifa)
1490                 atomic_add_int(&ifa->refcount, 1);
1491         /* correlation_id filled in during send routine later... */
1492         switch (sa->sa_family) {
1493 #ifdef INET6
1494         case AF_INET6:
1495                 {
1496                         /* IPv6 address */
1497                         struct sockaddr_in6 *sin6;
1498
1499                         sin6 = (struct sockaddr_in6 *)sa;
1500                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1501                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1502                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1503                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1504                             sizeof(struct in6_addr));
1505                         break;
1506                 }
1507 #endif
1508 #ifdef INET
1509         case AF_INET:
1510                 {
1511                         /* IPv4 address */
1512                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1513
1514                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1515                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1516                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1517                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1518                             sizeof(struct in_addr));
1519                         break;
1520                 }
1521 #endif
1522         default:
1523                 /* invalid family! */
1524                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1525                 if (ifa)
1526                         sctp_free_ifa(ifa);
1527                 return (-1);
1528         }
1529         aa->sent = 0;           /* clear sent flag */
1530
1531         /* delete goes to the back of the queue */
1532         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1533
1534         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1535         return (0);
1536 }
1537
1538 /*
1539  * find a specific asconf param on our "sent" queue
1540  */
1541 static struct sctp_asconf_addr *
1542 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1543 {
1544         struct sctp_asconf_addr *aa;
1545
1546         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1547                 if (aa->ap.aph.correlation_id == correlation_id &&
1548                     aa->sent == 1) {
1549                         /* found it */
1550                         return (aa);
1551                 }
1552         }
1553         /* didn't find it */
1554         return (NULL);
1555 }
1556
1557 /*
1558  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1559  * notifications based on the error response
1560  */
1561 static void
1562 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED,
1563     struct sctp_asconf_paramhdr *aph)
1564 {
1565         struct sctp_error_cause *eh;
1566         struct sctp_paramhdr *ph;
1567         uint16_t param_type;
1568         uint16_t error_code;
1569
1570         eh = (struct sctp_error_cause *)(aph + 1);
1571         ph = (struct sctp_paramhdr *)(eh + 1);
1572         /* validate lengths */
1573         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1574             htons(aph->ph.param_length)) {
1575                 /* invalid error cause length */
1576                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1577                     "asconf_process_error: cause element too long\n");
1578                 return;
1579         }
1580         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1581             htons(eh->length)) {
1582                 /* invalid included TLV length */
1583                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1584                     "asconf_process_error: included TLV too long\n");
1585                 return;
1586         }
1587         /* which error code ? */
1588         error_code = ntohs(eh->code);
1589         param_type = ntohs(aph->ph.param_type);
1590         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1591         switch (error_code) {
1592         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1593                 /* we allow ourselves to "try again" for this error */
1594                 break;
1595         default:
1596                 /* peer can't handle it... */
1597                 switch (param_type) {
1598                 case SCTP_ADD_IP_ADDRESS:
1599                 case SCTP_DEL_IP_ADDRESS:
1600                 case SCTP_SET_PRIM_ADDR:
1601                         break;
1602                 default:
1603                         break;
1604                 }
1605         }
1606 }
1607
1608 /*
1609  * process an asconf queue param.
1610  * aparam: parameter to process, will be removed from the queue.
1611  * flag: 1=success case, 0=failure case
1612  */
1613 static void
1614 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1615     struct sctp_asconf_addr *aparam, uint32_t flag)
1616 {
1617         uint16_t param_type;
1618
1619         /* process this param */
1620         param_type = aparam->ap.aph.ph.param_type;
1621         switch (param_type) {
1622         case SCTP_ADD_IP_ADDRESS:
1623                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1624                     "process_param_ack: added IP address\n");
1625                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1626                 break;
1627         case SCTP_DEL_IP_ADDRESS:
1628                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1629                     "process_param_ack: deleted IP address\n");
1630                 /* nothing really to do... lists already updated */
1631                 break;
1632         case SCTP_SET_PRIM_ADDR:
1633                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1634                     "process_param_ack: set primary IP address\n");
1635                 /* nothing to do... peer may start using this addr */
1636                 break;
1637         default:
1638                 /* should NEVER happen */
1639                 break;
1640         }
1641
1642         /* remove the param and free it */
1643         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1644         if (aparam->ifa)
1645                 sctp_free_ifa(aparam->ifa);
1646         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1647 }
1648
1649 /*
1650  * cleanup from a bad asconf ack parameter
1651  */
1652 static void
1653 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED)
1654 {
1655         /* assume peer doesn't really know how to do asconfs */
1656         /* XXX we could free the pending queue here */
1657
1658 }
1659
1660 void
1661 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1662     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1663     struct sctp_nets *net, int *abort_no_unlock)
1664 {
1665         struct sctp_association *asoc;
1666         uint32_t serial_num;
1667         uint16_t ack_length;
1668         struct sctp_asconf_paramhdr *aph;
1669         struct sctp_asconf_addr *aa, *aa_next;
1670         uint32_t last_error_id = 0;     /* last error correlation id */
1671         uint32_t id;
1672         struct sctp_asconf_addr *ap;
1673
1674         /* asconf param buffer */
1675         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1676
1677         /* verify minimum length */
1678         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1679                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1680                     "handle_asconf_ack: chunk too small = %xh\n",
1681                     ntohs(cp->ch.chunk_length));
1682                 return;
1683         }
1684         asoc = &stcb->asoc;
1685         serial_num = ntohl(cp->serial_number);
1686
1687         /*
1688          * NOTE: we may want to handle this differently- currently, we will
1689          * abort when we get an ack for the expected serial number + 1 (eg.
1690          * we didn't send it), process an ack normally if it is the expected
1691          * serial number, and re-send the previous ack for *ALL* other
1692          * serial numbers
1693          */
1694
1695         /*
1696          * if the serial number is the next expected, but I didn't send it,
1697          * abort the asoc, since someone probably just hijacked us...
1698          */
1699         if (serial_num == (asoc->asconf_seq_out + 1)) {
1700                 struct mbuf *op_err;
1701                 char msg[SCTP_DIAG_INFO_LEN];
1702
1703                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1704                 snprintf(msg, sizeof(msg), "Never sent serial number %8.8x",
1705                     serial_num);
1706                 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
1707                 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
1708                 *abort_no_unlock = 1;
1709                 return;
1710         }
1711         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1712                 /* got a duplicate/unexpected ASCONF-ACK */
1713                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1714                     serial_num, asoc->asconf_seq_out_acked + 1);
1715                 return;
1716         }
1717
1718         if (serial_num == asoc->asconf_seq_out - 1) {
1719                 /* stop our timer */
1720                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL,
1721                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5);
1722         }
1723
1724         /* process the ASCONF-ACK contents */
1725         ack_length = ntohs(cp->ch.chunk_length) -
1726             sizeof(struct sctp_asconf_ack_chunk);
1727         offset += sizeof(struct sctp_asconf_ack_chunk);
1728         /* process through all parameters */
1729         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1730                 unsigned int param_length, param_type;
1731
1732                 /* get pointer to next asconf parameter */
1733                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1734                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1735                 if (aph == NULL) {
1736                         /* can't get an asconf paramhdr */
1737                         sctp_asconf_ack_clear(stcb);
1738                         return;
1739                 }
1740                 param_type = ntohs(aph->ph.param_type);
1741                 param_length = ntohs(aph->ph.param_length);
1742                 if (param_length > ack_length) {
1743                         sctp_asconf_ack_clear(stcb);
1744                         return;
1745                 }
1746                 if (param_length < sizeof(struct sctp_paramhdr)) {
1747                         sctp_asconf_ack_clear(stcb);
1748                         return;
1749                 }
1750                 /* get the complete parameter... */
1751                 if (param_length > sizeof(aparam_buf)) {
1752                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1753                             "param length (%u) larger than buffer size!\n", param_length);
1754                         sctp_asconf_ack_clear(stcb);
1755                         return;
1756                 }
1757                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1758                 if (aph == NULL) {
1759                         sctp_asconf_ack_clear(stcb);
1760                         return;
1761                 }
1762                 /* correlation_id is transparent to peer, no ntohl needed */
1763                 id = aph->correlation_id;
1764
1765                 switch (param_type) {
1766                 case SCTP_ERROR_CAUSE_IND:
1767                         last_error_id = id;
1768                         /* find the corresponding asconf param in our queue */
1769                         ap = sctp_asconf_find_param(stcb, id);
1770                         if (ap == NULL) {
1771                                 /* hmm... can't find this in our queue! */
1772                                 break;
1773                         }
1774                         /* process the parameter, failed flag */
1775                         sctp_asconf_process_param_ack(stcb, ap, 0);
1776                         /* process the error response */
1777                         sctp_asconf_process_error(stcb, aph);
1778                         break;
1779                 case SCTP_SUCCESS_REPORT:
1780                         /* find the corresponding asconf param in our queue */
1781                         ap = sctp_asconf_find_param(stcb, id);
1782                         if (ap == NULL) {
1783                                 /* hmm... can't find this in our queue! */
1784                                 break;
1785                         }
1786                         /* process the parameter, success flag */
1787                         sctp_asconf_process_param_ack(stcb, ap, 1);
1788                         break;
1789                 default:
1790                         break;
1791                 }               /* switch */
1792
1793                 /* update remaining ASCONF-ACK message length to process */
1794                 ack_length -= SCTP_SIZE32(param_length);
1795                 if (ack_length <= 0) {
1796                         /* no more data in the mbuf chain */
1797                         break;
1798                 }
1799                 offset += SCTP_SIZE32(param_length);
1800         }                       /* while */
1801
1802         /*
1803          * if there are any "sent" params still on the queue, these are
1804          * implicitly "success", or "failed" (if we got an error back) ...
1805          * so process these appropriately
1806          *
1807          * we assume that the correlation_id's are monotonically increasing
1808          * beginning from 1 and that we don't have *that* many outstanding
1809          * at any given time
1810          */
1811         if (last_error_id == 0)
1812                 last_error_id--;        /* set to "max" value */
1813         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1814                 if (aa->sent == 1) {
1815                         /*
1816                          * implicitly successful or failed if correlation_id
1817                          * < last_error_id, then success else, failure
1818                          */
1819                         if (aa->ap.aph.correlation_id < last_error_id)
1820                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1821                         else
1822                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1823                 } else {
1824                         /*
1825                          * since we always process in order (FIFO queue) if
1826                          * we reach one that hasn't been sent, the rest
1827                          * should not have been sent either. so, we're
1828                          * done...
1829                          */
1830                         break;
1831                 }
1832         }
1833
1834         /* update the next sequence number to use */
1835         asoc->asconf_seq_out_acked++;
1836         /* remove the old ASCONF on our outbound queue */
1837         sctp_toss_old_asconf(stcb);
1838         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1839 #ifdef SCTP_TIMER_BASED_ASCONF
1840                 /* we have more params, so restart our timer */
1841                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1842                     stcb, net);
1843 #else
1844                 /* we have more params, so send out more */
1845                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1846 #endif
1847         }
1848 }
1849
1850 #ifdef INET6
1851 static uint32_t
1852 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1853 {
1854         struct sockaddr_in6 *sin6, *net6;
1855         struct sctp_nets *net;
1856
1857         if (sa->sa_family != AF_INET6) {
1858                 /* wrong family */
1859                 return (0);
1860         }
1861         sin6 = (struct sockaddr_in6 *)sa;
1862         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1863                 /* not link local address */
1864                 return (0);
1865         }
1866         /* hunt through our destination nets list for this scope_id */
1867         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1868                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1869                     AF_INET6)
1870                         continue;
1871                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1872                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1873                         continue;
1874                 if (sctp_is_same_scope(sin6, net6)) {
1875                         /* found one */
1876                         return (1);
1877                 }
1878         }
1879         /* didn't find one */
1880         return (0);
1881 }
1882 #endif
1883
1884 /*
1885  * address management functions
1886  */
1887 static void
1888 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1889     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1890 {
1891         int status;
1892
1893         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1894             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1895                 /* subset bound, no ASCONF allowed case, so ignore */
1896                 return;
1897         }
1898         /*
1899          * note: we know this is not the subset bound, no ASCONF case eg.
1900          * this is boundall or subset bound w/ASCONF allowed
1901          */
1902
1903         /* first, make sure that the address is IPv4 or IPv6 and not jailed */
1904         switch (ifa->address.sa.sa_family) {
1905 #ifdef INET6
1906         case AF_INET6:
1907                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1908                     &ifa->address.sin6.sin6_addr) != 0) {
1909                         return;
1910                 }
1911                 break;
1912 #endif
1913 #ifdef INET
1914         case AF_INET:
1915                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1916                     &ifa->address.sin.sin_addr) != 0) {
1917                         return;
1918                 }
1919                 break;
1920 #endif
1921         default:
1922                 return;
1923         }
1924 #ifdef INET6
1925         /* make sure we're "allowed" to add this type of addr */
1926         if (ifa->address.sa.sa_family == AF_INET6) {
1927                 /* invalid if we're not a v6 endpoint */
1928                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1929                         return;
1930                 /* is the v6 addr really valid ? */
1931                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1932                         return;
1933                 }
1934         }
1935 #endif
1936         /* put this address on the "pending/do not use yet" list */
1937         sctp_add_local_addr_restricted(stcb, ifa);
1938         /*
1939          * check address scope if address is out of scope, don't queue
1940          * anything... note: this would leave the address on both inp and
1941          * asoc lists
1942          */
1943         switch (ifa->address.sa.sa_family) {
1944 #ifdef INET6
1945         case AF_INET6:
1946                 {
1947                         struct sockaddr_in6 *sin6;
1948
1949                         sin6 = &ifa->address.sin6;
1950                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1951                                 /* we skip unspecifed addresses */
1952                                 return;
1953                         }
1954                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1955                                 if (stcb->asoc.scope.local_scope == 0) {
1956                                         return;
1957                                 }
1958                                 /* is it the right link local scope? */
1959                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1960                                         return;
1961                                 }
1962                         }
1963                         if (stcb->asoc.scope.site_scope == 0 &&
1964                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1965                                 return;
1966                         }
1967                         break;
1968                 }
1969 #endif
1970 #ifdef INET
1971         case AF_INET:
1972                 {
1973                         struct sockaddr_in *sin;
1974
1975                         /* invalid if we are a v6 only endpoint */
1976                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1977                             SCTP_IPV6_V6ONLY(inp))
1978                                 return;
1979
1980                         sin = &ifa->address.sin;
1981                         if (sin->sin_addr.s_addr == 0) {
1982                                 /* we skip unspecifed addresses */
1983                                 return;
1984                         }
1985                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
1986                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1987                                 return;
1988                         }
1989                         break;
1990                 }
1991 #endif
1992         default:
1993                 /* else, not AF_INET or AF_INET6, so skip */
1994                 return;
1995         }
1996
1997         /* queue an asconf for this address add/delete */
1998         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1999                 /* does the peer do asconf? */
2000                 if (stcb->asoc.asconf_supported) {
2001                         /* queue an asconf for this addr */
2002                         status = sctp_asconf_queue_add(stcb, ifa, type);
2003
2004                         /*
2005                          * if queued ok, and in the open state, send out the
2006                          * ASCONF.  If in the non-open state, these will be
2007                          * sent when the state goes open.
2008                          */
2009                         if (status == 0 &&
2010                             ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2011                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) {
2012 #ifdef SCTP_TIMER_BASED_ASCONF
2013                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
2014                                     stcb, stcb->asoc.primary_destination);
2015 #else
2016                                 sctp_send_asconf(stcb, NULL, addr_locked);
2017 #endif
2018                         }
2019                 }
2020         }
2021 }
2022
2023
2024 int
2025 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2026 {
2027         struct sctp_asconf_iterator *asc;
2028         struct sctp_ifa *ifa;
2029         struct sctp_laddr *l;
2030         int cnt_invalid = 0;
2031
2032         asc = (struct sctp_asconf_iterator *)ptr;
2033         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2034                 ifa = l->ifa;
2035                 switch (ifa->address.sa.sa_family) {
2036 #ifdef INET6
2037                 case AF_INET6:
2038                         /* invalid if we're not a v6 endpoint */
2039                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2040                                 cnt_invalid++;
2041                                 if (asc->cnt == cnt_invalid)
2042                                         return (1);
2043                         }
2044                         break;
2045 #endif
2046 #ifdef INET
2047                 case AF_INET:
2048                         {
2049                                 /* invalid if we are a v6 only endpoint */
2050                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2051                                     SCTP_IPV6_V6ONLY(inp)) {
2052                                         cnt_invalid++;
2053                                         if (asc->cnt == cnt_invalid)
2054                                                 return (1);
2055                                 }
2056                                 break;
2057                         }
2058 #endif
2059                 default:
2060                         /* invalid address family */
2061                         cnt_invalid++;
2062                         if (asc->cnt == cnt_invalid)
2063                                 return (1);
2064                 }
2065         }
2066         return (0);
2067 }
2068
2069 static int
2070 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2071 {
2072         struct sctp_ifa *ifa;
2073         struct sctp_asconf_iterator *asc;
2074         struct sctp_laddr *laddr, *nladdr, *l;
2075
2076         /* Only for specific case not bound all */
2077         asc = (struct sctp_asconf_iterator *)ptr;
2078         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2079                 ifa = l->ifa;
2080                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2081                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2082                             sctp_nxt_addr) {
2083                                 if (laddr->ifa == ifa) {
2084                                         laddr->action = 0;
2085                                         break;
2086                                 }
2087
2088                         }
2089                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2090                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2091                                 /* remove only after all guys are done */
2092                                 if (laddr->ifa == ifa) {
2093                                         sctp_del_local_addr_ep(inp, ifa);
2094                                 }
2095                         }
2096                 }
2097         }
2098         return (0);
2099 }
2100
2101 void
2102 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2103     void *ptr, uint32_t val SCTP_UNUSED)
2104 {
2105         struct sctp_asconf_iterator *asc;
2106         struct sctp_ifa *ifa;
2107         struct sctp_laddr *l;
2108         int cnt_invalid = 0;
2109         int type, status;
2110         int num_queued = 0;
2111
2112         asc = (struct sctp_asconf_iterator *)ptr;
2113         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2114                 ifa = l->ifa;
2115                 type = l->action;
2116
2117                 /* address's vrf_id must be the vrf_id of the assoc */
2118                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2119                         continue;
2120                 }
2121
2122                 /* Same checks again for assoc */
2123                 switch (ifa->address.sa.sa_family) {
2124 #ifdef INET6
2125                 case AF_INET6:
2126                         {
2127                                 /* invalid if we're not a v6 endpoint */
2128                                 struct sockaddr_in6 *sin6;
2129
2130                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2131                                         cnt_invalid++;
2132                                         if (asc->cnt == cnt_invalid)
2133                                                 return;
2134                                         else
2135                                                 continue;
2136                                 }
2137                                 sin6 = &ifa->address.sin6;
2138                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2139                                         /* we skip unspecifed addresses */
2140                                         continue;
2141                                 }
2142                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2143                                     &sin6->sin6_addr) != 0) {
2144                                         continue;
2145                                 }
2146                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2147                                         if (stcb->asoc.scope.local_scope == 0) {
2148                                                 continue;
2149                                         }
2150                                         /* is it the right link local scope? */
2151                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2152                                                 continue;
2153                                         }
2154                                 }
2155                                 break;
2156                         }
2157 #endif
2158 #ifdef INET
2159                 case AF_INET:
2160                         {
2161                                 /* invalid if we are a v6 only endpoint */
2162                                 struct sockaddr_in *sin;
2163
2164                                 /* invalid if we are a v6 only endpoint */
2165                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2166                                     SCTP_IPV6_V6ONLY(inp))
2167                                         continue;
2168
2169                                 sin = &ifa->address.sin;
2170                                 if (sin->sin_addr.s_addr == 0) {
2171                                         /* we skip unspecifed addresses */
2172                                         continue;
2173                                 }
2174                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2175                                     &sin->sin_addr) != 0) {
2176                                         continue;
2177                                 }
2178                                 if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2179                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2180                                         continue;
2181                                 }
2182                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2183                                     SCTP_IPV6_V6ONLY(inp)) {
2184                                         cnt_invalid++;
2185                                         if (asc->cnt == cnt_invalid)
2186                                                 return;
2187                                         else
2188                                                 continue;
2189                                 }
2190                                 break;
2191                         }
2192 #endif
2193                 default:
2194                         /* invalid address family */
2195                         cnt_invalid++;
2196                         if (asc->cnt == cnt_invalid)
2197                                 return;
2198                         else
2199                                 continue;
2200                         break;
2201                 }
2202
2203                 if (type == SCTP_ADD_IP_ADDRESS) {
2204                         /* prevent this address from being used as a source */
2205                         sctp_add_local_addr_restricted(stcb, ifa);
2206                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2207                         struct sctp_nets *net;
2208
2209                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2210
2211                                 /* delete this address if cached */
2212                                 if (net->ro._s_addr == ifa) {
2213                                         sctp_free_ifa(net->ro._s_addr);
2214                                         net->ro._s_addr = NULL;
2215                                         net->src_addr_selected = 0;
2216                                         RO_NHFREE(&net->ro);
2217                                         /*
2218                                          * Now we deleted our src address,
2219                                          * should we not also now reset the
2220                                          * cwnd/rto to start as if its a new
2221                                          * address?
2222                                          */
2223                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2224                                         net->RTO = 0;
2225
2226                                 }
2227                         }
2228                 } else if (type == SCTP_SET_PRIM_ADDR) {
2229                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2230                                 /* must validate the ifa is in the ep */
2231                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2232                                         continue;
2233                                 }
2234                         } else {
2235                                 /* Need to check scopes for this guy */
2236                                 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2237                                         continue;
2238                                 }
2239                         }
2240                 }
2241                 /* queue an asconf for this address add/delete */
2242                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2243                     stcb->asoc.asconf_supported == 1) {
2244                         /* queue an asconf for this addr */
2245                         status = sctp_asconf_queue_add(stcb, ifa, type);
2246                         /*
2247                          * if queued ok, and in the open state, update the
2248                          * count of queued params.  If in the non-open
2249                          * state, these get sent when the assoc goes open.
2250                          */
2251                         if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2252                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2253                                 if (status >= 0) {
2254                                         num_queued++;
2255                                 }
2256                         }
2257                 }
2258         }
2259         /*
2260          * If we have queued params in the open state, send out an ASCONF.
2261          */
2262         if (num_queued > 0) {
2263                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2264         }
2265 }
2266
2267 void
2268 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2269 {
2270         struct sctp_asconf_iterator *asc;
2271         struct sctp_ifa *ifa;
2272         struct sctp_laddr *l, *nl;
2273
2274         asc = (struct sctp_asconf_iterator *)ptr;
2275         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2276                 ifa = l->ifa;
2277                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2278                         /* Clear the defer use flag */
2279                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2280                 }
2281                 sctp_free_ifa(ifa);
2282                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2283                 SCTP_DECR_LADDR_COUNT();
2284         }
2285         SCTP_FREE(asc, SCTP_M_ASC_IT);
2286 }
2287
2288 /*
2289  * sa is the sockaddr to ask the peer to set primary to.
2290  * returns: 0 = completed, -1 = error
2291  */
2292 int32_t
2293 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2294 {
2295         uint32_t vrf_id;
2296         struct sctp_ifa *ifa;
2297
2298         /* find the ifa for the desired set primary */
2299         vrf_id = stcb->asoc.vrf_id;
2300         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2301         if (ifa == NULL) {
2302                 /* Invalid address */
2303                 return (-1);
2304         }
2305
2306         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2307         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2308                 /* set primary queuing succeeded */
2309                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2310                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2311                     (void *)stcb);
2312                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2313                 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2314                     (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2315 #ifdef SCTP_TIMER_BASED_ASCONF
2316                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2317                             stcb->sctp_ep, stcb,
2318                             stcb->asoc.primary_destination);
2319 #else
2320                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2321 #endif
2322                 }
2323         } else {
2324                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2325                     (void *)stcb);
2326                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2327                 return (-1);
2328         }
2329         return (0);
2330 }
2331
2332 int
2333 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2334 {
2335         struct sctp_tmit_chunk *chk, *nchk;
2336         unsigned int offset, asconf_limit;
2337         struct sctp_asconf_chunk *acp;
2338         struct sctp_asconf_paramhdr *aph;
2339         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2340         struct sctp_paramhdr *ph;
2341         int add_cnt, del_cnt;
2342         uint16_t last_param_type;
2343
2344         add_cnt = del_cnt = 0;
2345         last_param_type = 0;
2346         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2347                 if (chk->data == NULL) {
2348                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2349                         continue;
2350                 }
2351                 offset = 0;
2352                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2353                 offset += sizeof(struct sctp_asconf_chunk);
2354                 asconf_limit = ntohs(acp->ch.chunk_length);
2355                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2356                 if (ph == NULL) {
2357                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2358                         continue;
2359                 }
2360                 offset += ntohs(ph->param_length);
2361
2362                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2363                 if (aph == NULL) {
2364                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2365                         continue;
2366                 }
2367                 while (aph != NULL) {
2368                         unsigned int param_length, param_type;
2369
2370                         param_type = ntohs(aph->ph.param_type);
2371                         param_length = ntohs(aph->ph.param_length);
2372                         if (offset + param_length > asconf_limit) {
2373                                 /* parameter goes beyond end of chunk! */
2374                                 break;
2375                         }
2376                         if (param_length > sizeof(aparam_buf)) {
2377                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2378                                 break;
2379                         }
2380                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2381                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2382                                 break;
2383                         }
2384
2385                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2386                         if (aph == NULL) {
2387                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2388                                 break;
2389                         }
2390
2391                         ph = (struct sctp_paramhdr *)(aph + 1);
2392                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2393                                 switch (param_type) {
2394                                 case SCTP_ADD_IP_ADDRESS:
2395                                         add_cnt++;
2396                                         break;
2397                                 case SCTP_DEL_IP_ADDRESS:
2398                                         del_cnt++;
2399                                         break;
2400                                 default:
2401                                         break;
2402                                 }
2403                                 last_param_type = param_type;
2404                         }
2405
2406                         offset += SCTP_SIZE32(param_length);
2407                         if (offset >= asconf_limit) {
2408                                 /* no more data in the mbuf chain */
2409                                 break;
2410                         }
2411                         /* get pointer to next asconf param */
2412                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2413                 }
2414         }
2415
2416         /*
2417          * we want to find the sequences which consist of ADD -> DEL -> ADD
2418          * or DEL -> ADD
2419          */
2420         if (add_cnt > del_cnt ||
2421             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2422                 return (1);
2423         }
2424         return (0);
2425 }
2426
2427 static struct sockaddr *
2428 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2429 {
2430         struct sctp_vrf *vrf = NULL;
2431         struct sctp_ifn *sctp_ifn;
2432         struct sctp_ifa *sctp_ifa;
2433
2434         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2435                 SCTP_IPI_ADDR_RLOCK();
2436         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2437         if (vrf == NULL) {
2438                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2439                         SCTP_IPI_ADDR_RUNLOCK();
2440                 return (NULL);
2441         }
2442         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2443                 if (stcb->asoc.scope.loopback_scope == 0 &&
2444                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2445                         /* Skip if loopback_scope not set */
2446                         continue;
2447                 }
2448                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2449                         switch (sctp_ifa->address.sa.sa_family) {
2450 #ifdef INET
2451                         case AF_INET:
2452                                 if (stcb->asoc.scope.ipv4_addr_legal) {
2453                                         struct sockaddr_in *sin;
2454
2455                                         sin = &sctp_ifa->address.sin;
2456                                         if (sin->sin_addr.s_addr == 0) {
2457                                                 /* skip unspecifed addresses */
2458                                                 continue;
2459                                         }
2460                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
2461                                             &sin->sin_addr) != 0) {
2462                                                 continue;
2463                                         }
2464                                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2465                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2466                                                 continue;
2467
2468                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2469                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2470                                                 continue;
2471                                         /*
2472                                          * found a valid local v4 address to
2473                                          * use
2474                                          */
2475                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2476                                                 SCTP_IPI_ADDR_RUNLOCK();
2477                                         return (&sctp_ifa->address.sa);
2478                                 }
2479                                 break;
2480 #endif
2481 #ifdef INET6
2482                         case AF_INET6:
2483                                 if (stcb->asoc.scope.ipv6_addr_legal) {
2484                                         struct sockaddr_in6 *sin6;
2485
2486                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2487                                                 continue;
2488                                         }
2489
2490                                         sin6 = &sctp_ifa->address.sin6;
2491                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2492                                                 /*
2493                                                  * we skip unspecifed
2494                                                  * addresses
2495                                                  */
2496                                                 continue;
2497                                         }
2498                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
2499                                             &sin6->sin6_addr) != 0) {
2500                                                 continue;
2501                                         }
2502                                         if (stcb->asoc.scope.local_scope == 0 &&
2503                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2504                                                 continue;
2505                                         if (stcb->asoc.scope.site_scope == 0 &&
2506                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2507                                                 continue;
2508
2509                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2510                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2511                                                 continue;
2512                                         /*
2513                                          * found a valid local v6 address to
2514                                          * use
2515                                          */
2516                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2517                                                 SCTP_IPI_ADDR_RUNLOCK();
2518                                         return (&sctp_ifa->address.sa);
2519                                 }
2520                                 break;
2521 #endif
2522                         default:
2523                                 break;
2524                         }
2525                 }
2526         }
2527         /* no valid addresses found */
2528         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2529                 SCTP_IPI_ADDR_RUNLOCK();
2530         return (NULL);
2531 }
2532
2533 static struct sockaddr *
2534 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2535 {
2536         struct sctp_laddr *laddr;
2537
2538         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2539                 if (laddr->ifa == NULL) {
2540                         continue;
2541                 }
2542                 /* is the address restricted ? */
2543                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2544                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2545                         continue;
2546
2547                 /* found a valid local address to use */
2548                 return (&laddr->ifa->address.sa);
2549         }
2550         /* no valid addresses found */
2551         return (NULL);
2552 }
2553
2554 /*
2555  * builds an ASCONF chunk from queued ASCONF params.
2556  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2557  */
2558 struct mbuf *
2559 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2560 {
2561         struct mbuf *m_asconf, *m_asconf_chk;
2562         struct sctp_asconf_addr *aa;
2563         struct sctp_asconf_chunk *acp;
2564         struct sctp_asconf_paramhdr *aph;
2565         struct sctp_asconf_addr_param *aap;
2566         uint32_t p_length;
2567         uint32_t correlation_id = 1;    /* 0 is reserved... */
2568         caddr_t ptr, lookup_ptr;
2569         uint8_t lookup_used = 0;
2570
2571         /* are there any asconf params to send? */
2572         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2573                 if (aa->sent == 0)
2574                         break;
2575         }
2576         if (aa == NULL)
2577                 return (NULL);
2578
2579         /*
2580          * get a chunk header mbuf and a cluster for the asconf params since
2581          * it's simpler to fill in the asconf chunk header lookup address on
2582          * the fly
2583          */
2584         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA);
2585         if (m_asconf_chk == NULL) {
2586                 /* no mbuf's */
2587                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2588                     "compose_asconf: couldn't get chunk mbuf!\n");
2589                 return (NULL);
2590         }
2591         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
2592         if (m_asconf == NULL) {
2593                 /* no mbuf's */
2594                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2595                     "compose_asconf: couldn't get mbuf!\n");
2596                 sctp_m_freem(m_asconf_chk);
2597                 return (NULL);
2598         }
2599         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2600         SCTP_BUF_LEN(m_asconf) = 0;
2601         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2602         memset(acp, 0, sizeof(struct sctp_asconf_chunk));
2603         /* save pointers to lookup address and asconf params */
2604         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2605         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2606
2607         /* fill in chunk header info */
2608         acp->ch.chunk_type = SCTP_ASCONF;
2609         acp->ch.chunk_flags = 0;
2610         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2611         stcb->asoc.asconf_seq_out++;
2612
2613         /* add parameters... up to smallest MTU allowed */
2614         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2615                 if (aa->sent)
2616                         continue;
2617                 /* get the parameter length */
2618                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2619                 /* will it fit in current chunk? */
2620                 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) ||
2621                     (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) {
2622                         /* won't fit, so we're done with this chunk */
2623                         break;
2624                 }
2625                 /* assign (and store) a correlation id */
2626                 aa->ap.aph.correlation_id = correlation_id++;
2627
2628                 /*
2629                  * fill in address if we're doing a delete this is a simple
2630                  * way for us to fill in the correlation address, which
2631                  * should only be used by the peer if we're deleting our
2632                  * source address and adding a new address (e.g. renumbering
2633                  * case)
2634                  */
2635                 if (lookup_used == 0 &&
2636                     (aa->special_del == 0) &&
2637                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2638                         struct sctp_ipv6addr_param *lookup;
2639                         uint16_t p_size, addr_size;
2640
2641                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2642                         lookup->ph.param_type =
2643                             htons(aa->ap.addrp.ph.param_type);
2644                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2645                                 /* copy IPv6 address */
2646                                 p_size = sizeof(struct sctp_ipv6addr_param);
2647                                 addr_size = sizeof(struct in6_addr);
2648                         } else {
2649                                 /* copy IPv4 address */
2650                                 p_size = sizeof(struct sctp_ipv4addr_param);
2651                                 addr_size = sizeof(struct in_addr);
2652                         }
2653                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2654                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2655                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2656                         lookup_used = 1;
2657                 }
2658                 /* copy into current space */
2659                 memcpy(ptr, &aa->ap, p_length);
2660
2661                 /* network elements and update lengths */
2662                 aph = (struct sctp_asconf_paramhdr *)ptr;
2663                 aap = (struct sctp_asconf_addr_param *)ptr;
2664                 /* correlation_id is transparent to peer, no htonl needed */
2665                 aph->ph.param_type = htons(aph->ph.param_type);
2666                 aph->ph.param_length = htons(aph->ph.param_length);
2667                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2668                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2669
2670                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2671                 ptr += SCTP_SIZE32(p_length);
2672
2673                 /*
2674                  * these params are removed off the pending list upon
2675                  * getting an ASCONF-ACK back from the peer, just set flag
2676                  */
2677                 aa->sent = 1;
2678         }
2679         /* check to see if the lookup addr has been populated yet */
2680         if (lookup_used == 0) {
2681                 /* NOTE: if the address param is optional, can skip this... */
2682                 /* add any valid (existing) address... */
2683                 struct sctp_ipv6addr_param *lookup;
2684                 uint16_t p_size, addr_size;
2685                 struct sockaddr *found_addr;
2686                 caddr_t addr_ptr;
2687
2688                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2689                         found_addr = sctp_find_valid_localaddr(stcb,
2690                             addr_locked);
2691                 else
2692                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2693
2694                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2695                 if (found_addr != NULL) {
2696                         switch (found_addr->sa_family) {
2697 #ifdef INET6
2698                         case AF_INET6:
2699                                 /* copy IPv6 address */
2700                                 lookup->ph.param_type =
2701                                     htons(SCTP_IPV6_ADDRESS);
2702                                 p_size = sizeof(struct sctp_ipv6addr_param);
2703                                 addr_size = sizeof(struct in6_addr);
2704                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2705                                     found_addr)->sin6_addr;
2706                                 break;
2707 #endif
2708 #ifdef INET
2709                         case AF_INET:
2710                                 /* copy IPv4 address */
2711                                 lookup->ph.param_type =
2712                                     htons(SCTP_IPV4_ADDRESS);
2713                                 p_size = sizeof(struct sctp_ipv4addr_param);
2714                                 addr_size = sizeof(struct in_addr);
2715                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2716                                     found_addr)->sin_addr;
2717                                 break;
2718 #endif
2719                         default:
2720                                 p_size = 0;
2721                                 addr_size = 0;
2722                                 addr_ptr = NULL;
2723                                 break;
2724                         }
2725                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2726                         memcpy(lookup->addr, addr_ptr, addr_size);
2727                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2728                 } else {
2729                         /* uh oh... don't have any address?? */
2730                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2731                             "compose_asconf: no lookup addr!\n");
2732                         /* XXX for now, we send a IPv4 address of 0.0.0.0 */
2733                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2734                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2735                         memset(lookup->addr, 0, sizeof(struct in_addr));
2736                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2737                 }
2738         }
2739         /* chain it all together */
2740         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2741         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2742         acp->ch.chunk_length = htons(*retlen);
2743
2744         return (m_asconf_chk);
2745 }
2746
2747 /*
2748  * section to handle address changes before an association is up eg. changes
2749  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2750  */
2751
2752 /*
2753  * processes the (local) addresses in the INIT-ACK chunk
2754  */
2755 static void
2756 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2757     unsigned int offset, unsigned int length)
2758 {
2759         struct sctp_paramhdr tmp_param, *ph;
2760         uint16_t plen, ptype;
2761         struct sctp_ifa *sctp_ifa;
2762         union sctp_sockstore store;
2763 #ifdef INET6
2764         struct sctp_ipv6addr_param addr6_store;
2765 #endif
2766 #ifdef INET
2767         struct sctp_ipv4addr_param addr4_store;
2768 #endif
2769
2770         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2771         if (stcb == NULL)       /* Un-needed check for SA */
2772                 return;
2773
2774         /* convert to upper bound */
2775         length += offset;
2776
2777         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2778                 return;
2779         }
2780         /* go through the addresses in the init-ack */
2781         ph = (struct sctp_paramhdr *)
2782             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2783             (uint8_t *)&tmp_param);
2784         while (ph != NULL) {
2785                 ptype = ntohs(ph->param_type);
2786                 plen = ntohs(ph->param_length);
2787                 switch (ptype) {
2788 #ifdef INET6
2789                 case SCTP_IPV6_ADDRESS:
2790                         {
2791                                 struct sctp_ipv6addr_param *a6p;
2792
2793                                 /* get the entire IPv6 address param */
2794                                 a6p = (struct sctp_ipv6addr_param *)
2795                                     sctp_m_getptr(m, offset,
2796                                     sizeof(struct sctp_ipv6addr_param),
2797                                     (uint8_t *)&addr6_store);
2798                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2799                                     a6p == NULL) {
2800                                         return;
2801                                 }
2802                                 memset(&store, 0, sizeof(union sctp_sockstore));
2803                                 store.sin6.sin6_family = AF_INET6;
2804                                 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2805                                 store.sin6.sin6_port = stcb->rport;
2806                                 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr));
2807                                 break;
2808                         }
2809 #endif
2810 #ifdef INET
2811                 case SCTP_IPV4_ADDRESS:
2812                         {
2813                                 struct sctp_ipv4addr_param *a4p;
2814
2815                                 /* get the entire IPv4 address param */
2816                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2817                                     sizeof(struct sctp_ipv4addr_param),
2818                                     (uint8_t *)&addr4_store);
2819                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2820                                     a4p == NULL) {
2821                                         return;
2822                                 }
2823                                 memset(&store, 0, sizeof(union sctp_sockstore));
2824                                 store.sin.sin_family = AF_INET;
2825                                 store.sin.sin_len = sizeof(struct sockaddr_in);
2826                                 store.sin.sin_port = stcb->rport;
2827                                 store.sin.sin_addr.s_addr = a4p->addr;
2828                                 break;
2829                         }
2830 #endif
2831                 default:
2832                         goto next_addr;
2833                 }
2834
2835                 /* see if this address really (still) exists */
2836                 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id,
2837                     SCTP_ADDR_NOT_LOCKED);
2838                 if (sctp_ifa == NULL) {
2839                         /* address doesn't exist anymore */
2840                         int status;
2841
2842                         /* are ASCONFs allowed ? */
2843                         if ((sctp_is_feature_on(stcb->sctp_ep,
2844                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2845                             stcb->asoc.asconf_supported) {
2846                                 /* queue an ASCONF DEL_IP_ADDRESS */
2847                                 status = sctp_asconf_queue_sa_delete(stcb, &store.sa);
2848                                 /*
2849                                  * if queued ok, and in correct state, send
2850                                  * out the ASCONF.
2851                                  */
2852                                 if (status == 0 &&
2853                                     SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
2854 #ifdef SCTP_TIMER_BASED_ASCONF
2855                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2856                                             stcb->sctp_ep, stcb,
2857                                             stcb->asoc.primary_destination);
2858 #else
2859                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2860 #endif
2861                                 }
2862                         }
2863                 }
2864
2865 next_addr:
2866                 /*
2867                  * Sanity check:  Make sure the length isn't 0, otherwise
2868                  * we'll be stuck in this loop for a long time...
2869                  */
2870                 if (SCTP_SIZE32(plen) == 0) {
2871                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2872                             plen, ptype);
2873                         return;
2874                 }
2875                 /* get next parameter */
2876                 offset += SCTP_SIZE32(plen);
2877                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2878                         return;
2879                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2880                     sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2881         }                       /* while */
2882 }
2883
2884 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2885 /*
2886  * checks to see if a specific address is in the initack address list returns
2887  * 1 if found, 0 if not
2888  */
2889 static uint32_t
2890 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
2891 {
2892         struct sctp_paramhdr tmp_param, *ph;
2893         uint16_t plen, ptype;
2894 #ifdef INET
2895         struct sockaddr_in *sin;
2896         struct sctp_ipv4addr_param *a4p;
2897         struct sctp_ipv6addr_param addr4_store;
2898 #endif
2899 #ifdef INET6
2900         struct sockaddr_in6 *sin6;
2901         struct sctp_ipv6addr_param *a6p;
2902         struct sctp_ipv6addr_param addr6_store;
2903         struct sockaddr_in6 sin6_tmp;
2904 #endif
2905
2906         switch (sa->sa_family) {
2907 #ifdef INET
2908         case AF_INET:
2909                 break;
2910 #endif
2911 #ifdef INET6
2912         case AF_INET6:
2913                 break;
2914 #endif
2915         default:
2916                 return (0);
2917         }
2918
2919         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2920         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2921         /* convert to upper bound */
2922         length += offset;
2923
2924         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2925                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2926                     "find_initack_addr: invalid offset?\n");
2927                 return (0);
2928         }
2929         /* go through the addresses in the init-ack */
2930         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2931             sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2932         while (ph != NULL) {
2933                 ptype = ntohs(ph->param_type);
2934                 plen = ntohs(ph->param_length);
2935                 switch (ptype) {
2936 #ifdef INET6
2937                 case SCTP_IPV6_ADDRESS:
2938                         if (sa->sa_family == AF_INET6) {
2939                                 /* get the entire IPv6 address param */
2940                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
2941                                         break;
2942                                 }
2943                                 /* get the entire IPv6 address param */
2944                                 a6p = (struct sctp_ipv6addr_param *)
2945                                     sctp_m_getptr(m, offset,
2946                                     sizeof(struct sctp_ipv6addr_param),
2947                                     (uint8_t *)&addr6_store);
2948                                 if (a6p == NULL) {
2949                                         return (0);
2950                                 }
2951                                 sin6 = (struct sockaddr_in6 *)sa;
2952                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2953                                         /* create a copy and clear scope */
2954                                         memcpy(&sin6_tmp, sin6,
2955                                             sizeof(struct sockaddr_in6));
2956                                         sin6 = &sin6_tmp;
2957                                         in6_clearscope(&sin6->sin6_addr);
2958                                 }
2959                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
2960                                     sizeof(struct in6_addr)) == 0) {
2961                                         /* found it */
2962                                         return (1);
2963                                 }
2964                         }
2965                         break;
2966 #endif                          /* INET6 */
2967 #ifdef INET
2968                 case SCTP_IPV4_ADDRESS:
2969                         if (sa->sa_family == AF_INET) {
2970                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
2971                                         break;
2972                                 }
2973                                 /* get the entire IPv4 address param */
2974                                 a4p = (struct sctp_ipv4addr_param *)
2975                                     sctp_m_getptr(m, offset,
2976                                     sizeof(struct sctp_ipv4addr_param),
2977                                     (uint8_t *)&addr4_store);
2978                                 if (a4p == NULL) {
2979                                         return (0);
2980                                 }
2981                                 sin = (struct sockaddr_in *)sa;
2982                                 if (sin->sin_addr.s_addr == a4p->addr) {
2983                                         /* found it */
2984                                         return (1);
2985                                 }
2986                         }
2987                         break;
2988 #endif
2989                 default:
2990                         break;
2991                 }
2992                 /* get next parameter */
2993                 offset += SCTP_SIZE32(plen);
2994                 if (offset + sizeof(struct sctp_paramhdr) > length) {
2995                         return (0);
2996                 }
2997                 ph = (struct sctp_paramhdr *)
2998                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2999                     (uint8_t *)&tmp_param);
3000         }                       /* while */
3001         /* not found! */
3002         return (0);
3003 }
3004
3005 /*
3006  * makes sure that the current endpoint local addr list is consistent with
3007  * the new association (eg. subset bound, asconf allowed) adds addresses as
3008  * necessary
3009  */
3010 static void
3011 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3012     int length, struct sockaddr *init_addr)
3013 {
3014         struct sctp_laddr *laddr;
3015
3016         /* go through the endpoint list */
3017         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3018                 /* be paranoid and validate the laddr */
3019                 if (laddr->ifa == NULL) {
3020                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3021                             "check_addr_list_ep: laddr->ifa is NULL");
3022                         continue;
3023                 }
3024                 if (laddr->ifa == NULL) {
3025                         SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3026                         continue;
3027                 }
3028                 /* do i have it implicitly? */
3029                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3030                         continue;
3031                 }
3032                 /* check to see if in the init-ack */
3033                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3034                         /* try to add it */
3035                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3036                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3037                 }
3038         }
3039 }
3040
3041 /*
3042  * makes sure that the current kernel address list is consistent with the new
3043  * association (with all addrs bound) adds addresses as necessary
3044  */
3045 static void
3046 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3047     int length, struct sockaddr *init_addr,
3048     uint16_t local_scope, uint16_t site_scope,
3049     uint16_t ipv4_scope, uint16_t loopback_scope)
3050 {
3051         struct sctp_vrf *vrf = NULL;
3052         struct sctp_ifn *sctp_ifn;
3053         struct sctp_ifa *sctp_ifa;
3054         uint32_t vrf_id;
3055 #ifdef INET
3056         struct sockaddr_in *sin;
3057 #endif
3058 #ifdef INET6
3059         struct sockaddr_in6 *sin6;
3060 #endif
3061
3062         if (stcb) {
3063                 vrf_id = stcb->asoc.vrf_id;
3064         } else {
3065                 return;
3066         }
3067         SCTP_IPI_ADDR_RLOCK();
3068         vrf = sctp_find_vrf(vrf_id);
3069         if (vrf == NULL) {
3070                 SCTP_IPI_ADDR_RUNLOCK();
3071                 return;
3072         }
3073         /* go through all our known interfaces */
3074         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3075                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3076                         /* skip loopback interface */
3077                         continue;
3078                 }
3079                 /* go through each interface address */
3080                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3081                         /* do i have it implicitly? */
3082                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3083                                 continue;
3084                         }
3085                         switch (sctp_ifa->address.sa.sa_family) {
3086 #ifdef INET
3087                         case AF_INET:
3088                                 sin = &sctp_ifa->address.sin;
3089                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3090                                     &sin->sin_addr) != 0) {
3091                                         continue;
3092                                 }
3093                                 if ((ipv4_scope == 0) &&
3094                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3095                                         /* private address not in scope */
3096                                         continue;
3097                                 }
3098                                 break;
3099 #endif
3100 #ifdef INET6
3101                         case AF_INET6:
3102                                 sin6 = &sctp_ifa->address.sin6;
3103                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3104                                     &sin6->sin6_addr) != 0) {
3105                                         continue;
3106                                 }
3107                                 if ((local_scope == 0) &&
3108                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3109                                         continue;
3110                                 }
3111                                 if ((site_scope == 0) &&
3112                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3113                                         continue;
3114                                 }
3115                                 break;
3116 #endif
3117                         default:
3118                                 break;
3119                         }
3120                         /* check to see if in the init-ack */
3121                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3122                                 /* try to add it */
3123                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3124                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3125                                     SCTP_ADDR_LOCKED);
3126                         }
3127                 }               /* end foreach ifa */
3128         }                       /* end foreach ifn */
3129         SCTP_IPI_ADDR_RUNLOCK();
3130 }
3131
3132 /*
3133  * validates an init-ack chunk (from a cookie-echo) with current addresses
3134  * adds addresses from the init-ack into our local address list, if needed
3135  * queues asconf adds/deletes addresses as needed and makes appropriate list
3136  * changes for source address selection m, offset: points to the start of the
3137  * address list in an init-ack chunk length: total length of the address
3138  * params only init_addr: address where my INIT-ACK was sent from
3139  */
3140 void
3141 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3142     int length, struct sockaddr *init_addr,
3143     uint16_t local_scope, uint16_t site_scope,
3144     uint16_t ipv4_scope, uint16_t loopback_scope)
3145 {
3146         /* process the local addresses in the initack */
3147         sctp_process_initack_addresses(stcb, m, offset, length);
3148
3149         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3150                 /* bound all case */
3151                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3152                     local_scope, site_scope, ipv4_scope, loopback_scope);
3153         } else {
3154                 /* subset bound case */
3155                 if (sctp_is_feature_on(stcb->sctp_ep,
3156                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3157                         /* asconf's allowed */
3158                         sctp_check_address_list_ep(stcb, m, offset, length,
3159                             init_addr);
3160                 }
3161                 /* else, no asconfs allowed, so what we sent is what we get */
3162         }
3163 }
3164
3165 /*
3166  * sctp_bindx() support
3167  */
3168 uint32_t
3169 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3170     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3171 {
3172         struct sctp_ifa *ifa;
3173         struct sctp_laddr *laddr, *nladdr;
3174
3175         if (sa->sa_len == 0) {
3176                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3177                 return (EINVAL);
3178         }
3179         if (sctp_ifap) {
3180                 ifa = sctp_ifap;
3181         } else if (type == SCTP_ADD_IP_ADDRESS) {
3182                 /* For an add the address MUST be on the system */
3183                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3184         } else if (type == SCTP_DEL_IP_ADDRESS) {
3185                 /* For a delete we need to find it in the inp */
3186                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3187         } else {
3188                 ifa = NULL;
3189         }
3190         if (ifa != NULL) {
3191                 if (type == SCTP_ADD_IP_ADDRESS) {
3192                         sctp_add_local_addr_ep(inp, ifa, type);
3193                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3194                         if (inp->laddr_count < 2) {
3195                                 /* can't delete the last local address */
3196                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3197                                 return (EINVAL);
3198                         }
3199                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3200                             sctp_nxt_addr) {
3201                                 if (ifa == laddr->ifa) {
3202                                         /* Mark in the delete */
3203                                         laddr->action = type;
3204                                 }
3205                         }
3206                 }
3207                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3208                         /*
3209                          * There is no need to start the iterator if the inp
3210                          * has no associations.
3211                          */
3212                         if (type == SCTP_DEL_IP_ADDRESS) {
3213                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3214                                         if (laddr->ifa == ifa) {
3215                                                 sctp_del_local_addr_ep(inp, ifa);
3216                                         }
3217                                 }
3218                         }
3219                 } else {
3220                         struct sctp_asconf_iterator *asc;
3221                         struct sctp_laddr *wi;
3222                         int ret;
3223
3224                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3225                             sizeof(struct sctp_asconf_iterator),
3226                             SCTP_M_ASC_IT);
3227                         if (asc == NULL) {
3228                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3229                                 return (ENOMEM);
3230                         }
3231                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3232                         if (wi == NULL) {
3233                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3234                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3235                                 return (ENOMEM);
3236                         }
3237                         LIST_INIT(&asc->list_of_work);
3238                         asc->cnt = 1;
3239                         SCTP_INCR_LADDR_COUNT();
3240                         wi->ifa = ifa;
3241                         wi->action = type;
3242                         atomic_add_int(&ifa->refcount, 1);
3243                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3244                         ret = sctp_initiate_iterator(sctp_asconf_iterator_ep,
3245                             sctp_asconf_iterator_stcb,
3246                             sctp_asconf_iterator_ep_end,
3247                             SCTP_PCB_ANY_FLAGS,
3248                             SCTP_PCB_ANY_FEATURES,
3249                             SCTP_ASOC_ANY_STATE,
3250                             (void *)asc, 0,
3251                             sctp_asconf_iterator_end, inp, 0);
3252                         if (ret) {
3253                                 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n");
3254                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT);
3255                                 sctp_asconf_iterator_end(asc, 0);
3256                                 return (EFAULT);
3257                         }
3258                 }
3259                 return (0);
3260         } else {
3261                 /* invalid address! */
3262                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3263                 return (EADDRNOTAVAIL);
3264         }
3265 }
3266
3267 void
3268 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3269     struct sctp_nets *net)
3270 {
3271         struct sctp_asconf_addr *aa;
3272         struct sctp_ifa *sctp_ifap;
3273         struct sctp_asconf_tag_param *vtag;
3274 #ifdef INET
3275         struct sockaddr_in *to;
3276 #endif
3277 #ifdef INET6
3278         struct sockaddr_in6 *to6;
3279 #endif
3280         if (net == NULL) {
3281                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3282                 return;
3283         }
3284         if (stcb == NULL) {
3285                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3286                 return;
3287         }
3288         /*
3289          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3290          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3291          */
3292         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3293             SCTP_M_ASC_ADDR);
3294         if (aa == NULL) {
3295                 /* didn't get memory */
3296                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3297                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3298                 return;
3299         }
3300         aa->special_del = 0;
3301         /* fill in asconf address parameter fields */
3302         /* top level elements are "networked" during send */
3303         aa->ifa = NULL;
3304         aa->sent = 0;           /* clear sent flag */
3305         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3306         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3307         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3308         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3309         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3310         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3311
3312         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3313             SCTP_M_ASC_ADDR);
3314         if (aa == NULL) {
3315                 /* didn't get memory */
3316                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3317                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3318                 return;
3319         }
3320         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3321         /* fill in asconf address parameter fields */
3322         /* ADD(0.0.0.0) */
3323         switch (net->ro._l_addr.sa.sa_family) {
3324 #ifdef INET
3325         case AF_INET:
3326                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3327                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3328                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3329                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3330                 /* No need to add an address, we are using 0.0.0.0 */
3331                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3332                 break;
3333 #endif
3334 #ifdef INET6
3335         case AF_INET6:
3336                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3337                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3338                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3339                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3340                 /* No need to add an address, we are using 0.0.0.0 */
3341                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3342                 break;
3343 #endif
3344         default:
3345                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3346                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3347                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3348                 return;
3349         }
3350         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3351             SCTP_M_ASC_ADDR);
3352         if (aa == NULL) {
3353                 /* didn't get memory */
3354                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3355                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3356                 return;
3357         }
3358         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3359         /* fill in asconf address parameter fields */
3360         /* ADD(0.0.0.0) */
3361         switch (net->ro._l_addr.sa.sa_family) {
3362 #ifdef INET
3363         case AF_INET:
3364                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3365                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3366                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3367                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3368                 /* No need to add an address, we are using 0.0.0.0 */
3369                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3370                 break;
3371 #endif
3372 #ifdef INET6
3373         case AF_INET6:
3374                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3375                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3376                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3377                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3378                 /* No need to add an address, we are using 0.0.0.0 */
3379                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3380                 break;
3381 #endif
3382         default:
3383                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3384                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3385                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3386                 return;
3387         }
3388         /* Now we must hunt the addresses and add all global addresses */
3389         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3390                 struct sctp_vrf *vrf = NULL;
3391                 struct sctp_ifn *sctp_ifnp;
3392                 uint32_t vrf_id;
3393
3394                 vrf_id = stcb->sctp_ep->def_vrf_id;
3395                 vrf = sctp_find_vrf(vrf_id);
3396                 if (vrf == NULL) {
3397                         goto skip_rest;
3398                 }
3399
3400                 SCTP_IPI_ADDR_RLOCK();
3401                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3402                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3403                                 switch (sctp_ifap->address.sa.sa_family) {
3404 #ifdef INET
3405                                 case AF_INET:
3406                                         to = &sctp_ifap->address.sin;
3407                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3408                                             &to->sin_addr) != 0) {
3409                                                 continue;
3410                                         }
3411                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3412                                                 continue;
3413                                         }
3414                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3415                                                 continue;
3416                                         }
3417                                         break;
3418 #endif
3419 #ifdef INET6
3420                                 case AF_INET6:
3421                                         to6 = &sctp_ifap->address.sin6;
3422                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3423                                             &to6->sin6_addr) != 0) {
3424                                                 continue;
3425                                         }
3426                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3427                                                 continue;
3428                                         }
3429                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3430                                                 continue;
3431                                         }
3432                                         break;
3433 #endif
3434                                 default:
3435                                         continue;
3436                                 }
3437                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3438                         }
3439                 }
3440                 SCTP_IPI_ADDR_RUNLOCK();
3441         } else {
3442                 struct sctp_laddr *laddr;
3443
3444                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3445                         if (laddr->ifa == NULL) {
3446                                 continue;
3447                         }
3448                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3449                                 /*
3450                                  * Address being deleted by the system, dont
3451                                  * list.
3452                                  */
3453                                 continue;
3454                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3455                                 /*
3456                                  * Address being deleted on this ep don't
3457                                  * list.
3458                                  */
3459                                 continue;
3460                         }
3461                         sctp_ifap = laddr->ifa;
3462                         switch (sctp_ifap->address.sa.sa_family) {
3463 #ifdef INET
3464                         case AF_INET:
3465                                 to = &sctp_ifap->address.sin;
3466                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3467                                         continue;
3468                                 }
3469                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3470                                         continue;
3471                                 }
3472                                 break;
3473 #endif
3474 #ifdef INET6
3475                         case AF_INET6:
3476                                 to6 = &sctp_ifap->address.sin6;
3477                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3478                                         continue;
3479                                 }
3480                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3481                                         continue;
3482                                 }
3483                                 break;
3484 #endif
3485                         default:
3486                                 continue;
3487                         }
3488                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3489                 }
3490         }
3491 skip_rest:
3492         /* Now we must send the asconf into the queue */
3493         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3494 }