sys/netinet/sctp_asconf.c

   1 /*-
   2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <netinet/sctp_var.h>
  38 #include <netinet/sctp_sysctl.h>
  39 #include <netinet/sctp_pcb.h>
  40 #include <netinet/sctp_header.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp_output.h>
  43 #include <netinet/sctp_asconf.h>
  44 #include <netinet/sctp_timer.h>
  45
  46 /*
  47  * debug flags:
  48  * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
  49  * SCTP_DEBUG_ASCONF2: detailed info
  50  */
  51
  52
  53 /*
  54  * RFC 5061
  55  *
  56  * An ASCONF parameter queue exists per asoc which holds the pending address
  57  * operations.  Lists are updated upon receipt of ASCONF-ACK.
  58  *
  59  * A restricted_addrs list exists per assoc to hold local addresses that are
  60  * not (yet) usable by the assoc as a source address.  These addresses are
  61  * either pending an ASCONF operation (and exist on the ASCONF parameter
  62  * queue), or they are permanently restricted (the peer has returned an
  63  * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
  64  *
  65  * Deleted addresses are always immediately removed from the lists as they will
  66  * (shortly) no longer exist in the kernel.  We send ASCONFs as a courtesy,
  67  * only if allowed.
  68  */
  69
  70 /*
  71  * ASCONF parameter processing.
  72  * response_required: set if a reply is required (eg. SUCCESS_REPORT).
  73  * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
  74  * FIX: allocating this many mbufs on the fly is pretty inefficient...
  75  */
  76 static struct mbuf *
  77 sctp_asconf_success_response(uint32_t id)
  78 {
  79         struct mbuf *m_reply = NULL;
  80         struct sctp_asconf_paramhdr *aph;
  81
  82         m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
  83             0, M_NOWAIT, 1, MT_DATA);
  84         if (m_reply == NULL) {
  85                 SCTPDBG(SCTP_DEBUG_ASCONF1,
  86                     "asconf_success_response: couldn't get mbuf!\n");
  87                 return (NULL);
  88         }
  89         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
  90         aph->correlation_id = id;
  91         aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
  92         aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
  93         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
  94         aph->ph.param_length = htons(aph->ph.param_length);
  95
  96         return (m_reply);
  97 }
  98
  99 static struct mbuf *
 100 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv,
 101     uint16_t tlv_length)
 102 {
 103         struct mbuf *m_reply = NULL;
 104         struct sctp_asconf_paramhdr *aph;
 105         struct sctp_error_cause *error;
 106         uint8_t *tlv;
 107
 108         m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) +
 109             tlv_length +
 110             sizeof(struct sctp_error_cause)),
 111             0, M_NOWAIT, 1, MT_DATA);
 112         if (m_reply == NULL) {
 113                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 114                     "asconf_error_response: couldn't get mbuf!\n");
 115                 return (NULL);
 116         }
 117         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 118         error = (struct sctp_error_cause *)(aph + 1);
 119
 120         aph->correlation_id = id;
 121         aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
 122         error->code = htons(cause);
 123         error->length = tlv_length + sizeof(struct sctp_error_cause);
 124         aph->ph.param_length = error->length +
 125             sizeof(struct sctp_asconf_paramhdr);
 126
 127         if (aph->ph.param_length > MLEN) {
 128                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 129                     "asconf_error_response: tlv_length (%xh) too big\n",
 130                     tlv_length);
 131                 sctp_m_freem(m_reply);  /* discard */
 132                 return (NULL);
 133         }
 134         if (error_tlv != NULL) {
 135                 tlv = (uint8_t *)(error + 1);
 136                 memcpy(tlv, error_tlv, tlv_length);
 137         }
 138         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 139         error->length = htons(error->length);
 140         aph->ph.param_length = htons(aph->ph.param_length);
 141
 142         return (m_reply);
 143 }
 144
 145 static struct mbuf *
 146 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph,
 147     struct sctp_tcb *stcb, int send_hb, int response_required)
 148 {
 149         struct sctp_nets *net;
 150         struct mbuf *m_reply = NULL;
 151         union sctp_sockstore store;
 152         struct sctp_paramhdr *ph;
 153         uint16_t param_type, aparam_length;
 154 #if defined(INET) || defined(INET6)
 155         uint16_t param_length;
 156 #endif
 157         struct sockaddr *sa;
 158         int zero_address = 0;
 159         int bad_address = 0;
 160 #ifdef INET
 161         struct sockaddr_in *sin;
 162         struct sctp_ipv4addr_param *v4addr;
 163 #endif
 164 #ifdef INET6
 165         struct sockaddr_in6 *sin6;
 166         struct sctp_ipv6addr_param *v6addr;
 167 #endif
 168
 169         aparam_length = ntohs(aph->ph.param_length);
 170         ph = (struct sctp_paramhdr *)(aph + 1);
 171         param_type = ntohs(ph->param_type);
 172 #if defined(INET) || defined(INET6)
 173         param_length = ntohs(ph->param_length);
 174 #endif
 175         sa = &store.sa;
 176         switch (param_type) {
 177 #ifdef INET
 178         case SCTP_IPV4_ADDRESS:
 179                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 180                         /* invalid param size */
 181                         return (NULL);
 182                 }
 183                 v4addr = (struct sctp_ipv4addr_param *)ph;
 184                 sin = &store.sin;
 185                 memset(sin, 0, sizeof(*sin));
 186                 sin->sin_family = AF_INET;
 187                 sin->sin_len = sizeof(struct sockaddr_in);
 188                 sin->sin_port = stcb->rport;
 189                 sin->sin_addr.s_addr = v4addr->addr;
 190                 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 191                     IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 192                         bad_address = 1;
 193                 }
 194                 if (sin->sin_addr.s_addr == INADDR_ANY)
 195                         zero_address = 1;
 196                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 197                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 198                 break;
 199 #endif
 200 #ifdef INET6
 201         case SCTP_IPV6_ADDRESS:
 202                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 203                         /* invalid param size */
 204                         return (NULL);
 205                 }
 206                 v6addr = (struct sctp_ipv6addr_param *)ph;
 207                 sin6 = &store.sin6;
 208                 memset(sin6, 0, sizeof(*sin6));
 209                 sin6->sin6_family = AF_INET6;
 210                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 211                 sin6->sin6_port = stcb->rport;
 212                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 213                     sizeof(struct in6_addr));
 214                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 215                         bad_address = 1;
 216                 }
 217                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 218                         zero_address = 1;
 219                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 220                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 221                 break;
 222 #endif
 223         default:
 224                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 225                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph,
 226                     aparam_length);
 227                 return (m_reply);
 228         }                       /* end switch */
 229
 230         /* if 0.0.0.0/::0, add the source address instead */
 231         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 232                 sa = src;
 233                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 234                     "process_asconf_add_ip: using source addr ");
 235                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 236         }
 237         /* add the address */
 238         if (bad_address) {
 239                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 240                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph,
 241                     aparam_length);
 242         } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port,
 243                     SCTP_DONOT_SETSCOPE,
 244             SCTP_ADDR_DYNAMIC_ADDED) != 0) {
 245                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 246                     "process_asconf_add_ip: error adding address\n");
 247                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 248                     SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *)aph,
 249                     aparam_length);
 250         } else {
 251                 /* notify upper layer */
 252                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 253                 if (response_required) {
 254                         m_reply =
 255                             sctp_asconf_success_response(aph->correlation_id);
 256                 }
 257                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
 258                 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
 259                     stcb, net);
 260                 if (send_hb) {
 261                         sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 262                 }
 263         }
 264         return (m_reply);
 265 }
 266
 267 static int
 268 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
 269 {
 270         struct sctp_nets *src_net, *net;
 271
 272         /* make sure the source address exists as a destination net */
 273         src_net = sctp_findnet(stcb, src);
 274         if (src_net == NULL) {
 275                 /* not found */
 276                 return (-1);
 277         }
 278
 279         /* delete all destination addresses except the source */
 280         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 281                 if (net != src_net) {
 282                         /* delete this address */
 283                         sctp_remove_net(stcb, net);
 284                         SCTPDBG(SCTP_DEBUG_ASCONF1,
 285                             "asconf_del_remote_addrs_except: deleting ");
 286                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
 287                             (struct sockaddr *)&net->ro._l_addr);
 288                         /* notify upper layer */
 289                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
 290                             (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
 291                 }
 292         }
 293         return (0);
 294 }
 295
 296 static struct mbuf *
 297 sctp_process_asconf_delete_ip(struct sockaddr *src,
 298     struct sctp_asconf_paramhdr *aph,
 299     struct sctp_tcb *stcb, int response_required)
 300 {
 301         struct mbuf *m_reply = NULL;
 302         union sctp_sockstore store;
 303         struct sctp_paramhdr *ph;
 304         uint16_t param_type, aparam_length;
 305 #if defined(INET) || defined(INET6)
 306         uint16_t param_length;
 307 #endif
 308         struct sockaddr *sa;
 309         int zero_address = 0;
 310         int result;
 311 #ifdef INET
 312         struct sockaddr_in *sin;
 313         struct sctp_ipv4addr_param *v4addr;
 314 #endif
 315 #ifdef INET6
 316         struct sockaddr_in6 *sin6;
 317         struct sctp_ipv6addr_param *v6addr;
 318 #endif
 319
 320         aparam_length = ntohs(aph->ph.param_length);
 321         ph = (struct sctp_paramhdr *)(aph + 1);
 322         param_type = ntohs(ph->param_type);
 323 #if defined(INET) || defined(INET6)
 324         param_length = ntohs(ph->param_length);
 325 #endif
 326         sa = &store.sa;
 327         switch (param_type) {
 328 #ifdef INET
 329         case SCTP_IPV4_ADDRESS:
 330                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 331                         /* invalid param size */
 332                         return (NULL);
 333                 }
 334                 v4addr = (struct sctp_ipv4addr_param *)ph;
 335                 sin = &store.sin;
 336                 memset(sin, 0, sizeof(*sin));
 337                 sin->sin_family = AF_INET;
 338                 sin->sin_len = sizeof(struct sockaddr_in);
 339                 sin->sin_port = stcb->rport;
 340                 sin->sin_addr.s_addr = v4addr->addr;
 341                 if (sin->sin_addr.s_addr == INADDR_ANY)
 342                         zero_address = 1;
 343                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 344                     "process_asconf_delete_ip: deleting ");
 345                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 346                 break;
 347 #endif
 348 #ifdef INET6
 349         case SCTP_IPV6_ADDRESS:
 350                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 351                         /* invalid param size */
 352                         return (NULL);
 353                 }
 354                 v6addr = (struct sctp_ipv6addr_param *)ph;
 355                 sin6 = &store.sin6;
 356                 memset(sin6, 0, sizeof(*sin6));
 357                 sin6->sin6_family = AF_INET6;
 358                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 359                 sin6->sin6_port = stcb->rport;
 360                 memcpy(&sin6->sin6_addr, v6addr->addr,
 361                     sizeof(struct in6_addr));
 362                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 363                         zero_address = 1;
 364                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 365                     "process_asconf_delete_ip: deleting ");
 366                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 367                 break;
 368 #endif
 369         default:
 370                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 371                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 372                     aparam_length);
 373                 return (m_reply);
 374         }
 375
 376         /* make sure the source address is not being deleted */
 377         if (sctp_cmpaddr(sa, src)) {
 378                 /* trying to delete the source address! */
 379                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
 380                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 381                     SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph,
 382                     aparam_length);
 383                 return (m_reply);
 384         }
 385
 386         /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
 387         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 388                 result = sctp_asconf_del_remote_addrs_except(stcb, src);
 389
 390                 if (result) {
 391                         /* src address did not exist? */
 392                         SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
 393                         /* what error to reply with?? */
 394                         m_reply =
 395                             sctp_asconf_error_response(aph->correlation_id,
 396                             SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph,
 397                             aparam_length);
 398                 } else if (response_required) {
 399                         m_reply =
 400                             sctp_asconf_success_response(aph->correlation_id);
 401                 }
 402                 return (m_reply);
 403         }
 404
 405         /* delete the address */
 406         result = sctp_del_remote_addr(stcb, sa);
 407         /*
 408          * note if result == -2, the address doesn't exist in the asoc but
 409          * since it's being deleted anyways, we just ack the delete -- but
 410          * this probably means something has already gone awry
 411          */
 412         if (result == -1) {
 413                 /* only one address in the asoc */
 414                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
 415                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 416                     SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph,
 417                     aparam_length);
 418         } else {
 419                 if (response_required) {
 420                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 421                 }
 422                 /* notify upper layer */
 423                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 424         }
 425         return (m_reply);
 426 }
 427
 428 static struct mbuf *
 429 sctp_process_asconf_set_primary(struct sockaddr *src,
 430     struct sctp_asconf_paramhdr *aph,
 431     struct sctp_tcb *stcb, int response_required)
 432 {
 433         struct mbuf *m_reply = NULL;
 434         union sctp_sockstore store;
 435         struct sctp_paramhdr *ph;
 436         uint16_t param_type, aparam_length;
 437 #if defined(INET) || defined(INET6)
 438         uint16_t param_length;
 439 #endif
 440         struct sockaddr *sa;
 441         int zero_address = 0;
 442 #ifdef INET
 443         struct sockaddr_in *sin;
 444         struct sctp_ipv4addr_param *v4addr;
 445 #endif
 446 #ifdef INET6
 447         struct sockaddr_in6 *sin6;
 448         struct sctp_ipv6addr_param *v6addr;
 449 #endif
 450
 451         aparam_length = ntohs(aph->ph.param_length);
 452         ph = (struct sctp_paramhdr *)(aph + 1);
 453         param_type = ntohs(ph->param_type);
 454 #if defined(INET) || defined(INET6)
 455         param_length = ntohs(ph->param_length);
 456 #endif
 457         sa = &store.sa;
 458         switch (param_type) {
 459 #ifdef INET
 460         case SCTP_IPV4_ADDRESS:
 461                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 462                         /* invalid param size */
 463                         return (NULL);
 464                 }
 465                 v4addr = (struct sctp_ipv4addr_param *)ph;
 466                 sin = &store.sin;
 467                 memset(sin, 0, sizeof(*sin));
 468                 sin->sin_family = AF_INET;
 469                 sin->sin_len = sizeof(struct sockaddr_in);
 470                 sin->sin_addr.s_addr = v4addr->addr;
 471                 if (sin->sin_addr.s_addr == INADDR_ANY)
 472                         zero_address = 1;
 473                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 474                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 475                 break;
 476 #endif
 477 #ifdef INET6
 478         case SCTP_IPV6_ADDRESS:
 479                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 480                         /* invalid param size */
 481                         return (NULL);
 482                 }
 483                 v6addr = (struct sctp_ipv6addr_param *)ph;
 484                 sin6 = &store.sin6;
 485                 memset(sin6, 0, sizeof(*sin6));
 486                 sin6->sin6_family = AF_INET6;
 487                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 488                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 489                     sizeof(struct in6_addr));
 490                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 491                         zero_address = 1;
 492                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 493                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 494                 break;
 495 #endif
 496         default:
 497                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 498                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 499                     aparam_length);
 500                 return (m_reply);
 501         }
 502
 503         /* if 0.0.0.0/::0, use the source address instead */
 504         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 505                 sa = src;
 506                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 507                     "process_asconf_set_primary: using source addr ");
 508                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 509         }
 510         /* set the primary address */
 511         if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
 512                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 513                     "process_asconf_set_primary: primary address set\n");
 514                 /* notify upper layer */
 515                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 516                 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) &&
 517                     (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) &&
 518                     (stcb->asoc.alternate)) {
 519                         sctp_free_remote_addr(stcb->asoc.alternate);
 520                         stcb->asoc.alternate = NULL;
 521                 }
 522                 if (response_required) {
 523                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 524                 }
 525                 /*
 526                  * Mobility adaptation. Ideally, when the reception of SET
 527                  * PRIMARY with DELETE IP ADDRESS of the previous primary
 528                  * destination, unacknowledged DATA are retransmitted
 529                  * immediately to the new primary destination for seamless
 530                  * handover. If the destination is UNCONFIRMED and marked to
 531                  * REQ_PRIM, The retransmission occur when reception of the
 532                  * HEARTBEAT-ACK.  (See sctp_handle_heartbeat_ack in
 533                  * sctp_input.c) Also, when change of the primary
 534                  * destination, it is better that all subsequent new DATA
 535                  * containing already queued DATA are transmitted to the new
 536                  * primary destination. (by micchie)
 537                  */
 538                 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
 539                     SCTP_MOBILITY_BASE) ||
 540                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 541                     SCTP_MOBILITY_FASTHANDOFF)) &&
 542                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 543                     SCTP_MOBILITY_PRIM_DELETED) &&
 544                     (stcb->asoc.primary_destination->dest_state &
 545                     SCTP_ADDR_UNCONFIRMED) == 0) {
 546
 547                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
 548                             stcb->sctp_ep, stcb, NULL,
 549                             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1);
 550                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 551                             SCTP_MOBILITY_FASTHANDOFF)) {
 552                                 sctp_assoc_immediate_retrans(stcb,
 553                                     stcb->asoc.primary_destination);
 554                         }
 555                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 556                             SCTP_MOBILITY_BASE)) {
 557                                 sctp_move_chunks_from_net(stcb,
 558                                     stcb->asoc.deleted_primary);
 559                         }
 560                         sctp_delete_prim_timer(stcb->sctp_ep, stcb,
 561                             stcb->asoc.deleted_primary);
 562                 }
 563         } else {
 564                 /* couldn't set the requested primary address! */
 565                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 566                     "process_asconf_set_primary: set primary failed!\n");
 567                 /* must have been an invalid address, so report */
 568                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 569                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 570                     aparam_length);
 571         }
 572
 573         return (m_reply);
 574 }
 575
 576 /*
 577  * handles an ASCONF chunk.
 578  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 579  */
 580 void
 581 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 582     struct sockaddr *src,
 583     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 584     int first)
 585 {
 586         struct sctp_association *asoc;
 587         uint32_t serial_num;
 588         struct mbuf *n, *m_ack, *m_result, *m_tail;
 589         struct sctp_asconf_ack_chunk *ack_cp;
 590         struct sctp_asconf_paramhdr *aph;
 591         struct sctp_ipv6addr_param *p_addr;
 592         unsigned int asconf_limit, cnt;
 593         int error = 0;          /* did an error occur? */
 594
 595         /* asconf param buffer */
 596         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 597         struct sctp_asconf_ack *ack, *ack_next;
 598
 599         /* verify minimum length */
 600         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 601                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 602                     "handle_asconf: chunk too small = %xh\n",
 603                     ntohs(cp->ch.chunk_length));
 604                 return;
 605         }
 606         asoc = &stcb->asoc;
 607         serial_num = ntohl(cp->serial_number);
 608
 609         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 610                 /* got a duplicate ASCONF */
 611                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 612                     "handle_asconf: got duplicate serial number = %xh\n",
 613                     serial_num);
 614                 return;
 615         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 616                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 617                     serial_num, asoc->asconf_seq_in + 1);
 618                 return;
 619         }
 620
 621         /* it's the expected "next" sequence number, so process it */
 622         asoc->asconf_seq_in = serial_num;       /* update sequence */
 623         /* get length of all the param's in the ASCONF */
 624         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 625         SCTPDBG(SCTP_DEBUG_ASCONF1,
 626             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 627             asconf_limit, serial_num);
 628
 629         if (first) {
 630                 /* delete old cache */
 631                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 632
 633                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 634                         if (ack->serial_number == serial_num)
 635                                 break;
 636                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 637                             ack->serial_number, serial_num);
 638                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 639                         if (ack->data != NULL) {
 640                                 sctp_m_freem(ack->data);
 641                         }
 642                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 643                 }
 644         }
 645
 646         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 647             M_NOWAIT, 1, MT_DATA);
 648         if (m_ack == NULL) {
 649                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 650                     "handle_asconf: couldn't get mbuf!\n");
 651                 return;
 652         }
 653         m_tail = m_ack;         /* current reply chain's tail */
 654
 655         /* fill in ASCONF-ACK header */
 656         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 657         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 658         ack_cp->ch.chunk_flags = 0;
 659         ack_cp->serial_number = htonl(serial_num);
 660         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 661         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 662         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 663
 664         /* skip the lookup address parameter */
 665         offset += sizeof(struct sctp_asconf_chunk);
 666         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf);
 667         if (p_addr == NULL) {
 668                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 669                     "handle_asconf: couldn't get lookup addr!\n");
 670                 /* respond with a missing/invalid mandatory parameter error */
 671                 return;
 672         }
 673         /* param_length is already validated in process_control... */
 674         offset += ntohs(p_addr->ph.param_length);       /* skip lookup addr */
 675         /* get pointer to first asconf param in ASCONF */
 676         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf);
 677         if (aph == NULL) {
 678                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 679                 goto send_reply;
 680         }
 681         /* process through all parameters */
 682         cnt = 0;
 683         while (aph != NULL) {
 684                 unsigned int param_length, param_type;
 685
 686                 param_type = ntohs(aph->ph.param_type);
 687                 param_length = ntohs(aph->ph.param_length);
 688                 if (offset + param_length > asconf_limit) {
 689                         /* parameter goes beyond end of chunk! */
 690                         sctp_m_freem(m_ack);
 691                         return;
 692                 }
 693                 m_result = NULL;
 694
 695                 if (param_length > sizeof(aparam_buf)) {
 696                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 697                         sctp_m_freem(m_ack);
 698                         return;
 699                 }
 700                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 701                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 702                         sctp_m_freem(m_ack);
 703                 }
 704                 /* get the entire parameter */
 705                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 706                 if (aph == NULL) {
 707                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 708                         sctp_m_freem(m_ack);
 709                         return;
 710                 }
 711                 switch (param_type) {
 712                 case SCTP_ADD_IP_ADDRESS:
 713                         m_result = sctp_process_asconf_add_ip(src, aph, stcb,
 714                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 715                         cnt++;
 716                         break;
 717                 case SCTP_DEL_IP_ADDRESS:
 718                         m_result = sctp_process_asconf_delete_ip(src, aph, stcb,
 719                             error);
 720                         break;
 721                 case SCTP_ERROR_CAUSE_IND:
 722                         /* not valid in an ASCONF chunk */
 723                         break;
 724                 case SCTP_SET_PRIM_ADDR:
 725                         m_result = sctp_process_asconf_set_primary(src, aph,
 726                             stcb, error);
 727                         break;
 728                 case SCTP_NAT_VTAGS:
 729                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 730                         break;
 731                 case SCTP_SUCCESS_REPORT:
 732                         /* not valid in an ASCONF chunk */
 733                         break;
 734                 case SCTP_ULP_ADAPTATION:
 735                         /* FIX */
 736                         break;
 737                 default:
 738                         if ((param_type & 0x8000) == 0) {
 739                                 /* Been told to STOP at this param */
 740                                 asconf_limit = offset;
 741                                 /*
 742                                  * FIX FIX - We need to call
 743                                  * sctp_arethere_unrecognized_parameters()
 744                                  * to get a operr and send it for any
 745                                  * param's with the 0x4000 bit set OR do it
 746                                  * here ourselves... note we still must STOP
 747                                  * if the 0x8000 bit is clear.
 748                                  */
 749                         }
 750                         /* unknown/invalid param type */
 751                         break;
 752                 }               /* switch */
 753
 754                 /* add any (error) result to the reply mbuf chain */
 755                 if (m_result != NULL) {
 756                         SCTP_BUF_NEXT(m_tail) = m_result;
 757                         m_tail = m_result;
 758                         /* update lengths, make sure it's aligned too */
 759                         SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result));
 760                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 761                         /* set flag to force success reports */
 762                         error = 1;
 763                 }
 764                 offset += SCTP_SIZE32(param_length);
 765                 /* update remaining ASCONF message length to process */
 766                 if (offset >= asconf_limit) {
 767                         /* no more data in the mbuf chain */
 768                         break;
 769                 }
 770                 /* get pointer to next asconf param */
 771                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 772                     sizeof(struct sctp_asconf_paramhdr),
 773                     (uint8_t *)&aparam_buf);
 774                 if (aph == NULL) {
 775                         /* can't get an asconf paramhdr */
 776                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 777                         /* FIX ME - add error here... */
 778                 }
 779         }
 780
 781 send_reply:
 782         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 783         /* save the ASCONF-ACK reply */
 784         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 785             struct sctp_asconf_ack);
 786         if (ack == NULL) {
 787                 sctp_m_freem(m_ack);
 788                 return;
 789         }
 790         ack->serial_number = serial_num;
 791         ack->last_sent_to = NULL;
 792         ack->data = m_ack;
 793         ack->len = 0;
 794         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 795                 ack->len += SCTP_BUF_LEN(n);
 796         }
 797         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 798
 799         /* see if last_control_chunk_from is set properly (use IP src addr) */
 800         if (stcb->asoc.last_control_chunk_from == NULL) {
 801                 /*
 802                  * this could happen if the source address was just newly
 803                  * added
 804                  */
 805                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 806                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 807                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 808                 /* look up the from address */
 809                 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src);
 810 #ifdef SCTP_DEBUG
 811                 if (stcb->asoc.last_control_chunk_from == NULL) {
 812                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 813                 }
 814 #endif
 815         }
 816 }
 817
 818 /*
 819  * does the address match? returns 0 if not, 1 if so
 820  */
 821 static uint32_t
 822 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 823 {
 824         switch (sa->sa_family) {
 825 #ifdef INET6
 826         case AF_INET6:
 827                 {
 828                         /* XXX scopeid */
 829                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 830
 831                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 832                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 833                             sizeof(struct in6_addr)) == 0)) {
 834                                 return (1);
 835                         }
 836                         break;
 837                 }
 838 #endif
 839 #ifdef INET
 840         case AF_INET:
 841                 {
 842                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 843
 844                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 845                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 846                             sizeof(struct in_addr)) == 0)) {
 847                                 return (1);
 848                         }
 849                         break;
 850                 }
 851 #endif
 852         default:
 853                 break;
 854         }
 855         return (0);
 856 }
 857
 858 /*
 859  * does the address match? returns 0 if not, 1 if so
 860  */
 861 static uint32_t
 862 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 863 {
 864 #if defined(INET) || defined(INET6)
 865         uint16_t param_type, param_length;
 866
 867         param_type = ntohs(ph->param_type);
 868         param_length = ntohs(ph->param_length);
 869 #endif
 870         switch (sa->sa_family) {
 871 #ifdef INET6
 872         case AF_INET6:
 873                 {
 874                         /* XXX scopeid */
 875                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 876                         struct sctp_ipv6addr_param *v6addr;
 877
 878                         v6addr = (struct sctp_ipv6addr_param *)ph;
 879                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 880                             (param_length == sizeof(struct sctp_ipv6addr_param)) &&
 881                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 882                             sizeof(struct in6_addr)) == 0)) {
 883                                 return (1);
 884                         }
 885                         break;
 886                 }
 887 #endif
 888 #ifdef INET
 889         case AF_INET:
 890                 {
 891                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 892                         struct sctp_ipv4addr_param *v4addr;
 893
 894                         v4addr = (struct sctp_ipv4addr_param *)ph;
 895                         if ((param_type == SCTP_IPV4_ADDRESS) &&
 896                             (param_length == sizeof(struct sctp_ipv4addr_param)) &&
 897                             (memcmp(&v4addr->addr, &sin->sin_addr,
 898                             sizeof(struct in_addr)) == 0)) {
 899                                 return (1);
 900                         }
 901                         break;
 902                 }
 903 #endif
 904         default:
 905                 break;
 906         }
 907         return (0);
 908 }
 909
 910 /*
 911  * Cleanup for non-responded/OP ERR'd ASCONF
 912  */
 913 void
 914 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
 915 {
 916         /*
 917          * clear out any existing asconfs going out
 918          */
 919         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
 920             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
 921         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
 922         /* remove the old ASCONF on our outbound queue */
 923         sctp_toss_old_asconf(stcb);
 924 }
 925
 926 /*
 927  * cleanup any cached source addresses that may be topologically
 928  * incorrect after a new address has been added to this interface.
 929  */
 930 static void
 931 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
 932 {
 933         struct sctp_nets *net;
 934
 935         /*
 936          * Ideally, we want to only clear cached routes and source addresses
 937          * that are topologically incorrect.  But since there is no easy way
 938          * to know whether the newly added address on the ifn would cause a
 939          * routing change (i.e. a new egress interface would be chosen)
 940          * without doing a new routing lookup and source address selection,
 941          * we will (for now) just flush any cached route using a different
 942          * ifn (and cached source addrs) and let output re-choose them
 943          * during the next send on that net.
 944          */
 945         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 946                 /*
 947                  * clear any cached route (and cached source address) if the
 948                  * route's interface is NOT the same as the address change.
 949                  * If it's the same interface, just clear the cached source
 950                  * address.
 951                  */
 952                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
 953                     ((ifn == NULL) ||
 954                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
 955                         /* clear any cached route */
 956                         RTFREE(net->ro.ro_rt);
 957                         net->ro.ro_rt = NULL;
 958                 }
 959                 /* clear any cached source address */
 960                 if (net->src_addr_selected) {
 961                         sctp_free_ifa(net->ro._s_addr);
 962                         net->ro._s_addr = NULL;
 963                         net->src_addr_selected = 0;
 964                 }
 965         }
 966 }
 967
 968
 969 void
 970 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
 971 {
 972         int error;
 973
 974         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
 975                 return;
 976         }
 977         if (stcb->asoc.deleted_primary == NULL) {
 978                 return;
 979         }
 980
 981         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
 982                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
 983                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
 984                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
 985                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
 986                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
 987                     stcb->asoc.deleted_primary,
 988                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
 989                 stcb->asoc.num_send_timers_up--;
 990                 if (stcb->asoc.num_send_timers_up < 0) {
 991                         stcb->asoc.num_send_timers_up = 0;
 992                 }
 993                 SCTP_TCB_LOCK_ASSERT(stcb);
 994                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
 995                     stcb->asoc.deleted_primary);
 996                 if (error) {
 997                         SCTP_INP_DECR_REF(stcb->sctp_ep);
 998                         return;
 999                 }
1000                 SCTP_TCB_LOCK_ASSERT(stcb);
1001 #ifdef SCTP_AUDITING_ENABLED
1002                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1003 #endif
1004                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1005                 if ((stcb->asoc.num_send_timers_up == 0) &&
1006                     (stcb->asoc.sent_queue_cnt > 0)) {
1007                         struct sctp_tmit_chunk *chk;
1008
1009                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1010                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1011                             stcb, chk->whoTo);
1012                 }
1013         }
1014         return;
1015 }
1016
1017 static int
1018     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1019
1020 void
1021 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1022 {
1023         struct sctp_tmit_chunk *chk;
1024
1025         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1026         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1027             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4);
1028         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1029         net->error_count = 0;
1030         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1031                 if (chk->whoTo == net) {
1032                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1033                                 chk->sent = SCTP_DATAGRAM_RESEND;
1034                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1035                                 sctp_flight_size_decrease(chk);
1036                                 sctp_total_flight_decrease(stcb, chk);
1037                                 net->marked_retrans++;
1038                                 stcb->asoc.marked_retrans++;
1039                         }
1040                 }
1041         }
1042         if (net->marked_retrans) {
1043                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1044         }
1045 }
1046
1047 static void
1048 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1049 {
1050         struct sctp_nets *net;
1051         int addrnum, changed;
1052
1053         /*
1054          * If number of local valid addresses is 1, the valid address is
1055          * probably newly added address. Several valid addresses in this
1056          * association.  A source address may not be changed.  Additionally,
1057          * they can be configured on a same interface as "alias" addresses.
1058          * (by micchie)
1059          */
1060         addrnum = sctp_local_addr_count(stcb);
1061         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1062             addrnum);
1063         if (addrnum == 1) {
1064                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1065                         /* clear any cached route and source address */
1066                         if (net->ro.ro_rt) {
1067                                 RTFREE(net->ro.ro_rt);
1068                                 net->ro.ro_rt = NULL;
1069                         }
1070                         if (net->src_addr_selected) {
1071                                 sctp_free_ifa(net->ro._s_addr);
1072                                 net->ro._s_addr = NULL;
1073                                 net->src_addr_selected = 0;
1074                         }
1075                         /* Retransmit unacknowledged DATA chunks immediately */
1076                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1077                             SCTP_MOBILITY_FASTHANDOFF)) {
1078                                 sctp_net_immediate_retrans(stcb, net);
1079                         }
1080                         /* also, SET PRIMARY is maybe already sent */
1081                 }
1082                 return;
1083         }
1084
1085         /* Multiple local addresses exsist in the association.  */
1086         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1087                 /* clear any cached route and source address */
1088                 if (net->ro.ro_rt) {
1089                         RTFREE(net->ro.ro_rt);
1090                         net->ro.ro_rt = NULL;
1091                 }
1092                 if (net->src_addr_selected) {
1093                         sctp_free_ifa(net->ro._s_addr);
1094                         net->ro._s_addr = NULL;
1095                         net->src_addr_selected = 0;
1096                 }
1097                 /*
1098                  * Check if the nexthop is corresponding to the new address.
1099                  * If the new address is corresponding to the current
1100                  * nexthop, the path will be changed. If the new address is
1101                  * NOT corresponding to the current nexthop, the path will
1102                  * not be changed.
1103                  */
1104                 SCTP_RTALLOC((sctp_route_t *)&net->ro,
1105                     stcb->sctp_ep->def_vrf_id,
1106                     stcb->sctp_ep->fibnum);
1107                 if (net->ro.ro_rt == NULL)
1108                         continue;
1109
1110                 changed = 0;
1111                 switch (net->ro._l_addr.sa.sa_family) {
1112 #ifdef INET
1113                 case AF_INET:
1114                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) {
1115                                 changed = 1;
1116                         }
1117                         break;
1118 #endif
1119 #ifdef INET6
1120                 case AF_INET6:
1121                         if (sctp_v6src_match_nexthop(
1122                             &newifa->address.sin6, (sctp_route_t *)&net->ro)) {
1123                                 changed = 1;
1124                         }
1125                         break;
1126 #endif
1127                 default:
1128                         break;
1129                 }
1130                 /*
1131                  * if the newly added address does not relate routing
1132                  * information, we skip.
1133                  */
1134                 if (changed == 0)
1135                         continue;
1136                 /* Retransmit unacknowledged DATA chunks immediately */
1137                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1138                     SCTP_MOBILITY_FASTHANDOFF)) {
1139                         sctp_net_immediate_retrans(stcb, net);
1140                 }
1141                 /* Send SET PRIMARY for this new address */
1142                 if (net == stcb->asoc.primary_destination) {
1143                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1144                             SCTP_SET_PRIM_ADDR);
1145                 }
1146         }
1147 }
1148
1149 /*
1150  * process an ADD/DELETE IP ack from peer.
1151  * addr: corresponding sctp_ifa to the address being added/deleted.
1152  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1153  * flag: 1=success, 0=failure.
1154  */
1155 static void
1156 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1157 {
1158         /*
1159          * do the necessary asoc list work- if we get a failure indication,
1160          * leave the address on the assoc's restricted list.  If we get a
1161          * success indication, remove the address from the restricted list.
1162          */
1163         /*
1164          * Note: this will only occur for ADD_IP_ADDRESS, since
1165          * DEL_IP_ADDRESS is never actually added to the list...
1166          */
1167         if (flag) {
1168                 /* success case, so remove from the restricted list */
1169                 sctp_del_local_addr_restricted(stcb, addr);
1170
1171                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1172                     SCTP_MOBILITY_BASE) ||
1173                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1174                     SCTP_MOBILITY_FASTHANDOFF)) {
1175                         sctp_path_check_and_react(stcb, addr);
1176                         return;
1177                 }
1178                 /* clear any cached/topologically incorrect source addresses */
1179                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1180         }
1181         /* else, leave it on the list */
1182 }
1183
1184 /*
1185  * add an asconf add/delete/set primary IP address parameter to the queue.
1186  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1187  * returns 0 if queued, -1 if not queued/removed.
1188  * NOTE: if adding, but a delete for the same address is already scheduled
1189  * (and not yet sent out), simply remove it from queue.  Same for deleting
1190  * an address already scheduled for add.  If a duplicate operation is found,
1191  * ignore the new one.
1192  */
1193 static int
1194 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1195     uint16_t type)
1196 {
1197         struct sctp_asconf_addr *aa, *aa_next;
1198
1199         /* make sure the request isn't already in the queue */
1200         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1201                 /* address match? */
1202                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1203                         continue;
1204                 /*
1205                  * is the request already in queue but not sent? pass the
1206                  * request already sent in order to resolve the following
1207                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1208                  * can't remove the ADD request already sent 3. arrival of
1209                  * ADD
1210                  */
1211                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1212                         return (-1);
1213                 }
1214                 /* is the negative request already in queue, and not sent */
1215                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1216                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1217                         /* add requested, delete already queued */
1218                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1219                         /* remove the ifa from the restricted list */
1220                         sctp_del_local_addr_restricted(stcb, ifa);
1221                         /* free the asconf param */
1222                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1223                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1224                         return (-1);
1225                 }
1226                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1227                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1228                         /* delete requested, add already queued */
1229                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1230                         /* remove the aa->ifa from the restricted list */
1231                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1232                         /* free the asconf param */
1233                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1234                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1235                         return (-1);
1236                 }
1237         }                       /* for each aa */
1238
1239         /* adding new request to the queue */
1240         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1241             SCTP_M_ASC_ADDR);
1242         if (aa == NULL) {
1243                 /* didn't get memory */
1244                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1245                 return (-1);
1246         }
1247         aa->special_del = 0;
1248         /* fill in asconf address parameter fields */
1249         /* top level elements are "networked" during send */
1250         aa->ap.aph.ph.param_type = type;
1251         aa->ifa = ifa;
1252         atomic_add_int(&ifa->refcount, 1);
1253         /* correlation_id filled in during send routine later... */
1254         switch (ifa->address.sa.sa_family) {
1255 #ifdef INET6
1256         case AF_INET6:
1257                 {
1258                         struct sockaddr_in6 *sin6;
1259
1260                         sin6 = &ifa->address.sin6;
1261                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1262                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1263                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1264                             sizeof(struct sctp_ipv6addr_param);
1265                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1266                             sizeof(struct in6_addr));
1267                         break;
1268                 }
1269 #endif
1270 #ifdef INET
1271         case AF_INET:
1272                 {
1273                         struct sockaddr_in *sin;
1274
1275                         sin = &ifa->address.sin;
1276                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1277                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1278                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1279                             sizeof(struct sctp_ipv4addr_param);
1280                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1281                             sizeof(struct in_addr));
1282                         break;
1283                 }
1284 #endif
1285         default:
1286                 /* invalid family! */
1287                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1288                 sctp_free_ifa(ifa);
1289                 return (-1);
1290         }
1291         aa->sent = 0;           /* clear sent flag */
1292
1293         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1294 #ifdef SCTP_DEBUG
1295         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1296                 if (type == SCTP_ADD_IP_ADDRESS) {
1297                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1298                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1299                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1300                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1301                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1302                 } else {
1303                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1304                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1305                 }
1306         }
1307 #endif
1308
1309         return (0);
1310 }
1311
1312
1313 /*
1314  * add an asconf operation for the given ifa and type.
1315  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1316  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1317  * advisable.
1318  */
1319 static int
1320 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1321     uint16_t type)
1322 {
1323         uint32_t status;
1324         int pending_delete_queued = 0;
1325         int last;
1326
1327         /* see if peer supports ASCONF */
1328         if (stcb->asoc.asconf_supported == 0) {
1329                 return (-1);
1330         }
1331
1332         /*
1333          * if this is deleting the last address from the assoc, mark it as
1334          * pending.
1335          */
1336         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) {
1337                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1338                         last = (sctp_local_addr_count(stcb) == 0);
1339                 } else {
1340                         last = (sctp_local_addr_count(stcb) == 1);
1341                 }
1342                 if (last) {
1343                         /* set the pending delete info only */
1344                         stcb->asoc.asconf_del_pending = 1;
1345                         stcb->asoc.asconf_addr_del_pending = ifa;
1346                         atomic_add_int(&ifa->refcount, 1);
1347                         SCTPDBG(SCTP_DEBUG_ASCONF2,
1348                             "asconf_queue_add: mark delete last address pending\n");
1349                         return (-1);
1350                 }
1351         }
1352
1353         /* queue an asconf parameter */
1354         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1355
1356         /*
1357          * if this is an add, and there is a delete also pending (i.e. the
1358          * last local address is being changed), queue the pending delete
1359          * too.
1360          */
1361         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1362                 /* queue in the pending delete */
1363                 if (sctp_asconf_queue_mgmt(stcb,
1364                     stcb->asoc.asconf_addr_del_pending,
1365                     SCTP_DEL_IP_ADDRESS) == 0) {
1366                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n");
1367                         pending_delete_queued = 1;
1368                         /* clear out the pending delete info */
1369                         stcb->asoc.asconf_del_pending = 0;
1370                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1371                         stcb->asoc.asconf_addr_del_pending = NULL;
1372                 }
1373         }
1374
1375         if (pending_delete_queued) {
1376                 struct sctp_nets *net;
1377
1378                 /*
1379                  * since we know that the only/last address is now being
1380                  * changed in this case, reset the cwnd/rto on all nets to
1381                  * start as a new address and path.  Also clear the error
1382                  * counts to give the assoc the best chance to complete the
1383                  * address change.
1384                  */
1385                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1386                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1387                             net);
1388                         net->RTO = 0;
1389                         net->error_count = 0;
1390                 }
1391                 stcb->asoc.overall_error_count = 0;
1392                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1393                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1394                             stcb->asoc.overall_error_count,
1395                             0,
1396                             SCTP_FROM_SCTP_ASCONF,
1397                             __LINE__);
1398                 }
1399
1400                 /* queue in an advisory set primary too */
1401                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1402                 /* let caller know we should send this out immediately */
1403                 status = 1;
1404         }
1405         return (status);
1406 }
1407
1408 /*-
1409  * add an asconf delete IP address parameter to the queue by sockaddr and
1410  * possibly with no sctp_ifa available.  This is only called by the routine
1411  * that checks the addresses in an INIT-ACK against the current address list.
1412  * returns 0 if completed, non-zero if not completed.
1413  * NOTE: if an add is already scheduled (and not yet sent out), simply
1414  * remove it from queue.  If a duplicate operation is found, ignore the
1415  * new one.
1416  */
1417 static int
1418 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1419 {
1420         struct sctp_ifa *ifa;
1421         struct sctp_asconf_addr *aa, *aa_next;
1422
1423         if (stcb == NULL) {
1424                 return (-1);
1425         }
1426         /* see if peer supports ASCONF */
1427         if (stcb->asoc.asconf_supported == 0) {
1428                 return (-1);
1429         }
1430         /* make sure the request isn't already in the queue */
1431         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1432                 /* address match? */
1433                 if (sctp_asconf_addr_match(aa, sa) == 0)
1434                         continue;
1435                 /* is the request already in queue (sent or not) */
1436                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1437                         return (-1);
1438                 }
1439                 /* is the negative request already in queue, and not sent */
1440                 if (aa->sent == 1)
1441                         continue;
1442                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1443                         /* add already queued, so remove existing entry */
1444                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1445                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1446                         /* free the entry */
1447                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1448                         return (-1);
1449                 }
1450         }                       /* for each aa */
1451
1452         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1453         ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED);
1454
1455         /* adding new request to the queue */
1456         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1457             SCTP_M_ASC_ADDR);
1458         if (aa == NULL) {
1459                 /* didn't get memory */
1460                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1461                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1462                 return (-1);
1463         }
1464         aa->special_del = 0;
1465         /* fill in asconf address parameter fields */
1466         /* top level elements are "networked" during send */
1467         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1468         aa->ifa = ifa;
1469         if (ifa)
1470                 atomic_add_int(&ifa->refcount, 1);
1471         /* correlation_id filled in during send routine later... */
1472         switch (sa->sa_family) {
1473 #ifdef INET6
1474         case AF_INET6:
1475                 {
1476                         /* IPv6 address */
1477                         struct sockaddr_in6 *sin6;
1478
1479                         sin6 = (struct sockaddr_in6 *)sa;
1480                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1481                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1482                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1483                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1484                             sizeof(struct in6_addr));
1485                         break;
1486                 }
1487 #endif
1488 #ifdef INET
1489         case AF_INET:
1490                 {
1491                         /* IPv4 address */
1492                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1493
1494                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1495                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1496                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1497                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1498                             sizeof(struct in_addr));
1499                         break;
1500                 }
1501 #endif
1502         default:
1503                 /* invalid family! */
1504                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1505                 if (ifa)
1506                         sctp_free_ifa(ifa);
1507                 return (-1);
1508         }
1509         aa->sent = 0;           /* clear sent flag */
1510
1511         /* delete goes to the back of the queue */
1512         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1513
1514         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1515         return (0);
1516 }
1517
1518 /*
1519  * find a specific asconf param on our "sent" queue
1520  */
1521 static struct sctp_asconf_addr *
1522 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1523 {
1524         struct sctp_asconf_addr *aa;
1525
1526         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1527                 if (aa->ap.aph.correlation_id == correlation_id &&
1528                     aa->sent == 1) {
1529                         /* found it */
1530                         return (aa);
1531                 }
1532         }
1533         /* didn't find it */
1534         return (NULL);
1535 }
1536
1537 /*
1538  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1539  * notifications based on the error response
1540  */
1541 static void
1542 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED,
1543     struct sctp_asconf_paramhdr *aph)
1544 {
1545         struct sctp_error_cause *eh;
1546         struct sctp_paramhdr *ph;
1547         uint16_t param_type;
1548         uint16_t error_code;
1549
1550         eh = (struct sctp_error_cause *)(aph + 1);
1551         ph = (struct sctp_paramhdr *)(eh + 1);
1552         /* validate lengths */
1553         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1554             htons(aph->ph.param_length)) {
1555                 /* invalid error cause length */
1556                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1557                     "asconf_process_error: cause element too long\n");
1558                 return;
1559         }
1560         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1561             htons(eh->length)) {
1562                 /* invalid included TLV length */
1563                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1564                     "asconf_process_error: included TLV too long\n");
1565                 return;
1566         }
1567         /* which error code ? */
1568         error_code = ntohs(eh->code);
1569         param_type = ntohs(aph->ph.param_type);
1570         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1571         switch (error_code) {
1572         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1573                 /* we allow ourselves to "try again" for this error */
1574                 break;
1575         default:
1576                 /* peer can't handle it... */
1577                 switch (param_type) {
1578                 case SCTP_ADD_IP_ADDRESS:
1579                 case SCTP_DEL_IP_ADDRESS:
1580                 case SCTP_SET_PRIM_ADDR:
1581                         break;
1582                 default:
1583                         break;
1584                 }
1585         }
1586 }
1587
1588 /*
1589  * process an asconf queue param.
1590  * aparam: parameter to process, will be removed from the queue.
1591  * flag: 1=success case, 0=failure case
1592  */
1593 static void
1594 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1595     struct sctp_asconf_addr *aparam, uint32_t flag)
1596 {
1597         uint16_t param_type;
1598
1599         /* process this param */
1600         param_type = aparam->ap.aph.ph.param_type;
1601         switch (param_type) {
1602         case SCTP_ADD_IP_ADDRESS:
1603                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1604                     "process_param_ack: added IP address\n");
1605                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1606                 break;
1607         case SCTP_DEL_IP_ADDRESS:
1608                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1609                     "process_param_ack: deleted IP address\n");
1610                 /* nothing really to do... lists already updated */
1611                 break;
1612         case SCTP_SET_PRIM_ADDR:
1613                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1614                     "process_param_ack: set primary IP address\n");
1615                 /* nothing to do... peer may start using this addr */
1616                 break;
1617         default:
1618                 /* should NEVER happen */
1619                 break;
1620         }
1621
1622         /* remove the param and free it */
1623         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1624         if (aparam->ifa)
1625                 sctp_free_ifa(aparam->ifa);
1626         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1627 }
1628
1629 /*
1630  * cleanup from a bad asconf ack parameter
1631  */
1632 static void
1633 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED)
1634 {
1635         /* assume peer doesn't really know how to do asconfs */
1636         /* XXX we could free the pending queue here */
1637
1638 }
1639
1640 void
1641 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1642     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1643     struct sctp_nets *net, int *abort_no_unlock)
1644 {
1645         struct sctp_association *asoc;
1646         uint32_t serial_num;
1647         uint16_t ack_length;
1648         struct sctp_asconf_paramhdr *aph;
1649         struct sctp_asconf_addr *aa, *aa_next;
1650         uint32_t last_error_id = 0;     /* last error correlation id */
1651         uint32_t id;
1652         struct sctp_asconf_addr *ap;
1653
1654         /* asconf param buffer */
1655         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1656
1657         /* verify minimum length */
1658         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1659                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1660                     "handle_asconf_ack: chunk too small = %xh\n",
1661                     ntohs(cp->ch.chunk_length));
1662                 return;
1663         }
1664         asoc = &stcb->asoc;
1665         serial_num = ntohl(cp->serial_number);
1666
1667         /*
1668          * NOTE: we may want to handle this differently- currently, we will
1669          * abort when we get an ack for the expected serial number + 1 (eg.
1670          * we didn't send it), process an ack normally if it is the expected
1671          * serial number, and re-send the previous ack for *ALL* other
1672          * serial numbers
1673          */
1674
1675         /*
1676          * if the serial number is the next expected, but I didn't send it,
1677          * abort the asoc, since someone probably just hijacked us...
1678          */
1679         if (serial_num == (asoc->asconf_seq_out + 1)) {
1680                 struct mbuf *op_err;
1681                 char msg[SCTP_DIAG_INFO_LEN];
1682
1683                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1684                 snprintf(msg, sizeof(msg), "Never sent serial number %8.8x",
1685                     serial_num);
1686                 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
1687                 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
1688                 *abort_no_unlock = 1;
1689                 return;
1690         }
1691         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1692                 /* got a duplicate/unexpected ASCONF-ACK */
1693                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1694                     serial_num, asoc->asconf_seq_out_acked + 1);
1695                 return;
1696         }
1697
1698         if (serial_num == asoc->asconf_seq_out - 1) {
1699                 /* stop our timer */
1700                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1701                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5);
1702         }
1703
1704         /* process the ASCONF-ACK contents */
1705         ack_length = ntohs(cp->ch.chunk_length) -
1706             sizeof(struct sctp_asconf_ack_chunk);
1707         offset += sizeof(struct sctp_asconf_ack_chunk);
1708         /* process through all parameters */
1709         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1710                 unsigned int param_length, param_type;
1711
1712                 /* get pointer to next asconf parameter */
1713                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1714                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1715                 if (aph == NULL) {
1716                         /* can't get an asconf paramhdr */
1717                         sctp_asconf_ack_clear(stcb);
1718                         return;
1719                 }
1720                 param_type = ntohs(aph->ph.param_type);
1721                 param_length = ntohs(aph->ph.param_length);
1722                 if (param_length > ack_length) {
1723                         sctp_asconf_ack_clear(stcb);
1724                         return;
1725                 }
1726                 if (param_length < sizeof(struct sctp_paramhdr)) {
1727                         sctp_asconf_ack_clear(stcb);
1728                         return;
1729                 }
1730                 /* get the complete parameter... */
1731                 if (param_length > sizeof(aparam_buf)) {
1732                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1733                             "param length (%u) larger than buffer size!\n", param_length);
1734                         sctp_asconf_ack_clear(stcb);
1735                         return;
1736                 }
1737                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1738                 if (aph == NULL) {
1739                         sctp_asconf_ack_clear(stcb);
1740                         return;
1741                 }
1742                 /* correlation_id is transparent to peer, no ntohl needed */
1743                 id = aph->correlation_id;
1744
1745                 switch (param_type) {
1746                 case SCTP_ERROR_CAUSE_IND:
1747                         last_error_id = id;
1748                         /* find the corresponding asconf param in our queue */
1749                         ap = sctp_asconf_find_param(stcb, id);
1750                         if (ap == NULL) {
1751                                 /* hmm... can't find this in our queue! */
1752                                 break;
1753                         }
1754                         /* process the parameter, failed flag */
1755                         sctp_asconf_process_param_ack(stcb, ap, 0);
1756                         /* process the error response */
1757                         sctp_asconf_process_error(stcb, aph);
1758                         break;
1759                 case SCTP_SUCCESS_REPORT:
1760                         /* find the corresponding asconf param in our queue */
1761                         ap = sctp_asconf_find_param(stcb, id);
1762                         if (ap == NULL) {
1763                                 /* hmm... can't find this in our queue! */
1764                                 break;
1765                         }
1766                         /* process the parameter, success flag */
1767                         sctp_asconf_process_param_ack(stcb, ap, 1);
1768                         break;
1769                 default:
1770                         break;
1771                 }               /* switch */
1772
1773                 /* update remaining ASCONF-ACK message length to process */
1774                 ack_length -= SCTP_SIZE32(param_length);
1775                 if (ack_length <= 0) {
1776                         /* no more data in the mbuf chain */
1777                         break;
1778                 }
1779                 offset += SCTP_SIZE32(param_length);
1780         }                       /* while */
1781
1782         /*
1783          * if there are any "sent" params still on the queue, these are
1784          * implicitly "success", or "failed" (if we got an error back) ...
1785          * so process these appropriately
1786          *
1787          * we assume that the correlation_id's are monotonically increasing
1788          * beginning from 1 and that we don't have *that* many outstanding
1789          * at any given time
1790          */
1791         if (last_error_id == 0)
1792                 last_error_id--;        /* set to "max" value */
1793         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1794                 if (aa->sent == 1) {
1795                         /*
1796                          * implicitly successful or failed if correlation_id
1797                          * < last_error_id, then success else, failure
1798                          */
1799                         if (aa->ap.aph.correlation_id < last_error_id)
1800                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1801                         else
1802                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1803                 } else {
1804                         /*
1805                          * since we always process in order (FIFO queue) if
1806                          * we reach one that hasn't been sent, the rest
1807                          * should not have been sent either. so, we're
1808                          * done...
1809                          */
1810                         break;
1811                 }
1812         }
1813
1814         /* update the next sequence number to use */
1815         asoc->asconf_seq_out_acked++;
1816         /* remove the old ASCONF on our outbound queue */
1817         sctp_toss_old_asconf(stcb);
1818         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1819 #ifdef SCTP_TIMER_BASED_ASCONF
1820                 /* we have more params, so restart our timer */
1821                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1822                     stcb, net);
1823 #else
1824                 /* we have more params, so send out more */
1825                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1826 #endif
1827         }
1828 }
1829
1830 #ifdef INET6
1831 static uint32_t
1832 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1833 {
1834         struct sockaddr_in6 *sin6, *net6;
1835         struct sctp_nets *net;
1836
1837         if (sa->sa_family != AF_INET6) {
1838                 /* wrong family */
1839                 return (0);
1840         }
1841         sin6 = (struct sockaddr_in6 *)sa;
1842         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1843                 /* not link local address */
1844                 return (0);
1845         }
1846         /* hunt through our destination nets list for this scope_id */
1847         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1848                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1849                     AF_INET6)
1850                         continue;
1851                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1852                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1853                         continue;
1854                 if (sctp_is_same_scope(sin6, net6)) {
1855                         /* found one */
1856                         return (1);
1857                 }
1858         }
1859         /* didn't find one */
1860         return (0);
1861 }
1862 #endif
1863
1864 /*
1865  * address management functions
1866  */
1867 static void
1868 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1869     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1870 {
1871         int status;
1872
1873         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1874             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1875                 /* subset bound, no ASCONF allowed case, so ignore */
1876                 return;
1877         }
1878         /*
1879          * note: we know this is not the subset bound, no ASCONF case eg.
1880          * this is boundall or subset bound w/ASCONF allowed
1881          */
1882
1883         /* first, make sure that the address is IPv4 or IPv6 and not jailed */
1884         switch (ifa->address.sa.sa_family) {
1885 #ifdef INET6
1886         case AF_INET6:
1887                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1888                     &ifa->address.sin6.sin6_addr) != 0) {
1889                         return;
1890                 }
1891                 break;
1892 #endif
1893 #ifdef INET
1894         case AF_INET:
1895                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1896                     &ifa->address.sin.sin_addr) != 0) {
1897                         return;
1898                 }
1899                 break;
1900 #endif
1901         default:
1902                 return;
1903         }
1904 #ifdef INET6
1905         /* make sure we're "allowed" to add this type of addr */
1906         if (ifa->address.sa.sa_family == AF_INET6) {
1907                 /* invalid if we're not a v6 endpoint */
1908                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1909                         return;
1910                 /* is the v6 addr really valid ? */
1911                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1912                         return;
1913                 }
1914         }
1915 #endif
1916         /* put this address on the "pending/do not use yet" list */
1917         sctp_add_local_addr_restricted(stcb, ifa);
1918         /*
1919          * check address scope if address is out of scope, don't queue
1920          * anything... note: this would leave the address on both inp and
1921          * asoc lists
1922          */
1923         switch (ifa->address.sa.sa_family) {
1924 #ifdef INET6
1925         case AF_INET6:
1926                 {
1927                         struct sockaddr_in6 *sin6;
1928
1929                         sin6 = &ifa->address.sin6;
1930                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1931                                 /* we skip unspecifed addresses */
1932                                 return;
1933                         }
1934                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1935                                 if (stcb->asoc.scope.local_scope == 0) {
1936                                         return;
1937                                 }
1938                                 /* is it the right link local scope? */
1939                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1940                                         return;
1941                                 }
1942                         }
1943                         if (stcb->asoc.scope.site_scope == 0 &&
1944                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1945                                 return;
1946                         }
1947                         break;
1948                 }
1949 #endif
1950 #ifdef INET
1951         case AF_INET:
1952                 {
1953                         struct sockaddr_in *sin;
1954                         struct in6pcb *inp6;
1955
1956                         inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1957                         /* invalid if we are a v6 only endpoint */
1958                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1959                             SCTP_IPV6_V6ONLY(inp6))
1960                                 return;
1961
1962                         sin = &ifa->address.sin;
1963                         if (sin->sin_addr.s_addr == 0) {
1964                                 /* we skip unspecifed addresses */
1965                                 return;
1966                         }
1967                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
1968                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1969                                 return;
1970                         }
1971                         break;
1972                 }
1973 #endif
1974         default:
1975                 /* else, not AF_INET or AF_INET6, so skip */
1976                 return;
1977         }
1978
1979         /* queue an asconf for this address add/delete */
1980         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1981                 /* does the peer do asconf? */
1982                 if (stcb->asoc.asconf_supported) {
1983                         /* queue an asconf for this addr */
1984                         status = sctp_asconf_queue_add(stcb, ifa, type);
1985
1986                         /*
1987                          * if queued ok, and in the open state, send out the
1988                          * ASCONF.  If in the non-open state, these will be
1989                          * sent when the state goes open.
1990                          */
1991                         if (status == 0 &&
1992                             ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
1993                             (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED))) {
1994 #ifdef SCTP_TIMER_BASED_ASCONF
1995                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
1996                                     stcb, stcb->asoc.primary_destination);
1997 #else
1998                                 sctp_send_asconf(stcb, NULL, addr_locked);
1999 #endif
2000                         }
2001                 }
2002         }
2003 }
2004
2005
2006 int
2007 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2008 {
2009         struct sctp_asconf_iterator *asc;
2010         struct sctp_ifa *ifa;
2011         struct sctp_laddr *l;
2012         int cnt_invalid = 0;
2013
2014         asc = (struct sctp_asconf_iterator *)ptr;
2015         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2016                 ifa = l->ifa;
2017                 switch (ifa->address.sa.sa_family) {
2018 #ifdef INET6
2019                 case AF_INET6:
2020                         /* invalid if we're not a v6 endpoint */
2021                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2022                                 cnt_invalid++;
2023                                 if (asc->cnt == cnt_invalid)
2024                                         return (1);
2025                         }
2026                         break;
2027 #endif
2028 #ifdef INET
2029                 case AF_INET:
2030                         {
2031                                 /* invalid if we are a v6 only endpoint */
2032                                 struct in6pcb *inp6;
2033
2034                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2035                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2036                                     SCTP_IPV6_V6ONLY(inp6)) {
2037                                         cnt_invalid++;
2038                                         if (asc->cnt == cnt_invalid)
2039                                                 return (1);
2040                                 }
2041                                 break;
2042                         }
2043 #endif
2044                 default:
2045                         /* invalid address family */
2046                         cnt_invalid++;
2047                         if (asc->cnt == cnt_invalid)
2048                                 return (1);
2049                 }
2050         }
2051         return (0);
2052 }
2053
2054 static int
2055 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2056 {
2057         struct sctp_ifa *ifa;
2058         struct sctp_asconf_iterator *asc;
2059         struct sctp_laddr *laddr, *nladdr, *l;
2060
2061         /* Only for specific case not bound all */
2062         asc = (struct sctp_asconf_iterator *)ptr;
2063         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2064                 ifa = l->ifa;
2065                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2066                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2067                             sctp_nxt_addr) {
2068                                 if (laddr->ifa == ifa) {
2069                                         laddr->action = 0;
2070                                         break;
2071                                 }
2072
2073                         }
2074                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2075                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2076                                 /* remove only after all guys are done */
2077                                 if (laddr->ifa == ifa) {
2078                                         sctp_del_local_addr_ep(inp, ifa);
2079                                 }
2080                         }
2081                 }
2082         }
2083         return (0);
2084 }
2085
2086 void
2087 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2088     void *ptr, uint32_t val SCTP_UNUSED)
2089 {
2090         struct sctp_asconf_iterator *asc;
2091         struct sctp_ifa *ifa;
2092         struct sctp_laddr *l;
2093         int cnt_invalid = 0;
2094         int type, status;
2095         int num_queued = 0;
2096
2097         asc = (struct sctp_asconf_iterator *)ptr;
2098         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2099                 ifa = l->ifa;
2100                 type = l->action;
2101
2102                 /* address's vrf_id must be the vrf_id of the assoc */
2103                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2104                         continue;
2105                 }
2106
2107                 /* Same checks again for assoc */
2108                 switch (ifa->address.sa.sa_family) {
2109 #ifdef INET6
2110                 case AF_INET6:
2111                         {
2112                                 /* invalid if we're not a v6 endpoint */
2113                                 struct sockaddr_in6 *sin6;
2114
2115                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2116                                         cnt_invalid++;
2117                                         if (asc->cnt == cnt_invalid)
2118                                                 return;
2119                                         else
2120                                                 continue;
2121                                 }
2122                                 sin6 = &ifa->address.sin6;
2123                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2124                                         /* we skip unspecifed addresses */
2125                                         continue;
2126                                 }
2127                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2128                                     &sin6->sin6_addr) != 0) {
2129                                         continue;
2130                                 }
2131                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2132                                         if (stcb->asoc.scope.local_scope == 0) {
2133                                                 continue;
2134                                         }
2135                                         /* is it the right link local scope? */
2136                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2137                                                 continue;
2138                                         }
2139                                 }
2140                                 break;
2141                         }
2142 #endif
2143 #ifdef INET
2144                 case AF_INET:
2145                         {
2146                                 /* invalid if we are a v6 only endpoint */
2147                                 struct in6pcb *inp6;
2148                                 struct sockaddr_in *sin;
2149
2150                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2151                                 /* invalid if we are a v6 only endpoint */
2152                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2153                                     SCTP_IPV6_V6ONLY(inp6))
2154                                         continue;
2155
2156                                 sin = &ifa->address.sin;
2157                                 if (sin->sin_addr.s_addr == 0) {
2158                                         /* we skip unspecifed addresses */
2159                                         continue;
2160                                 }
2161                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2162                                     &sin->sin_addr) != 0) {
2163                                         continue;
2164                                 }
2165                                 if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2166                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2167                                         continue;
2168                                 }
2169                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2170                                     SCTP_IPV6_V6ONLY(inp6)) {
2171                                         cnt_invalid++;
2172                                         if (asc->cnt == cnt_invalid)
2173                                                 return;
2174                                         else
2175                                                 continue;
2176                                 }
2177                                 break;
2178                         }
2179 #endif
2180                 default:
2181                         /* invalid address family */
2182                         cnt_invalid++;
2183                         if (asc->cnt == cnt_invalid)
2184                                 return;
2185                         else
2186                                 continue;
2187                         break;
2188                 }
2189
2190                 if (type == SCTP_ADD_IP_ADDRESS) {
2191                         /* prevent this address from being used as a source */
2192                         sctp_add_local_addr_restricted(stcb, ifa);
2193                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2194                         struct sctp_nets *net;
2195
2196                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2197                                 sctp_rtentry_t *rt;
2198
2199                                 /* delete this address if cached */
2200                                 if (net->ro._s_addr == ifa) {
2201                                         sctp_free_ifa(net->ro._s_addr);
2202                                         net->ro._s_addr = NULL;
2203                                         net->src_addr_selected = 0;
2204                                         rt = net->ro.ro_rt;
2205                                         if (rt) {
2206                                                 RTFREE(rt);
2207                                                 net->ro.ro_rt = NULL;
2208                                         }
2209                                         /*
2210                                          * Now we deleted our src address,
2211                                          * should we not also now reset the
2212                                          * cwnd/rto to start as if its a new
2213                                          * address?
2214                                          */
2215                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2216                                         net->RTO = 0;
2217
2218                                 }
2219                         }
2220                 } else if (type == SCTP_SET_PRIM_ADDR) {
2221                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2222                                 /* must validate the ifa is in the ep */
2223                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2224                                         continue;
2225                                 }
2226                         } else {
2227                                 /* Need to check scopes for this guy */
2228                                 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2229                                         continue;
2230                                 }
2231                         }
2232                 }
2233                 /* queue an asconf for this address add/delete */
2234                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2235                     stcb->asoc.asconf_supported == 1) {
2236                         /* queue an asconf for this addr */
2237                         status = sctp_asconf_queue_add(stcb, ifa, type);
2238                         /*
2239                          * if queued ok, and in the open state, update the
2240                          * count of queued params.  If in the non-open
2241                          * state, these get sent when the assoc goes open.
2242                          */
2243                         if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
2244                             (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2245                                 if (status >= 0) {
2246                                         num_queued++;
2247                                 }
2248                         }
2249                 }
2250         }
2251         /*
2252          * If we have queued params in the open state, send out an ASCONF.
2253          */
2254         if (num_queued > 0) {
2255                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2256         }
2257 }
2258
2259 void
2260 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2261 {
2262         struct sctp_asconf_iterator *asc;
2263         struct sctp_ifa *ifa;
2264         struct sctp_laddr *l, *nl;
2265
2266         asc = (struct sctp_asconf_iterator *)ptr;
2267         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2268                 ifa = l->ifa;
2269                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2270                         /* Clear the defer use flag */
2271                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2272                 }
2273                 sctp_free_ifa(ifa);
2274                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2275                 SCTP_DECR_LADDR_COUNT();
2276         }
2277         SCTP_FREE(asc, SCTP_M_ASC_IT);
2278 }
2279
2280 /*
2281  * sa is the sockaddr to ask the peer to set primary to.
2282  * returns: 0 = completed, -1 = error
2283  */
2284 int32_t
2285 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2286 {
2287         uint32_t vrf_id;
2288         struct sctp_ifa *ifa;
2289
2290         /* find the ifa for the desired set primary */
2291         vrf_id = stcb->asoc.vrf_id;
2292         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2293         if (ifa == NULL) {
2294                 /* Invalid address */
2295                 return (-1);
2296         }
2297
2298         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2299         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2300                 /* set primary queuing succeeded */
2301                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2302                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2303                     (void *)stcb);
2304                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2305                 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
2306                     (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2307 #ifdef SCTP_TIMER_BASED_ASCONF
2308                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2309                             stcb->sctp_ep, stcb,
2310                             stcb->asoc.primary_destination);
2311 #else
2312                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2313 #endif
2314                 }
2315         } else {
2316                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2317                     (void *)stcb);
2318                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2319                 return (-1);
2320         }
2321         return (0);
2322 }
2323
2324 int
2325 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2326 {
2327         struct sctp_tmit_chunk *chk, *nchk;
2328         unsigned int offset, asconf_limit;
2329         struct sctp_asconf_chunk *acp;
2330         struct sctp_asconf_paramhdr *aph;
2331         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2332         struct sctp_paramhdr *ph;
2333         int add_cnt, del_cnt;
2334         uint16_t last_param_type;
2335
2336         add_cnt = del_cnt = 0;
2337         last_param_type = 0;
2338         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2339                 if (chk->data == NULL) {
2340                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2341                         continue;
2342                 }
2343                 offset = 0;
2344                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2345                 offset += sizeof(struct sctp_asconf_chunk);
2346                 asconf_limit = ntohs(acp->ch.chunk_length);
2347                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2348                 if (ph == NULL) {
2349                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2350                         continue;
2351                 }
2352                 offset += ntohs(ph->param_length);
2353
2354                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2355                 if (aph == NULL) {
2356                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2357                         continue;
2358                 }
2359                 while (aph != NULL) {
2360                         unsigned int param_length, param_type;
2361
2362                         param_type = ntohs(aph->ph.param_type);
2363                         param_length = ntohs(aph->ph.param_length);
2364                         if (offset + param_length > asconf_limit) {
2365                                 /* parameter goes beyond end of chunk! */
2366                                 break;
2367                         }
2368                         if (param_length > sizeof(aparam_buf)) {
2369                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2370                                 break;
2371                         }
2372                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2373                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2374                                 break;
2375                         }
2376
2377                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2378                         if (aph == NULL) {
2379                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2380                                 break;
2381                         }
2382
2383                         ph = (struct sctp_paramhdr *)(aph + 1);
2384                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2385                                 switch (param_type) {
2386                                 case SCTP_ADD_IP_ADDRESS:
2387                                         add_cnt++;
2388                                         break;
2389                                 case SCTP_DEL_IP_ADDRESS:
2390                                         del_cnt++;
2391                                         break;
2392                                 default:
2393                                         break;
2394                                 }
2395                                 last_param_type = param_type;
2396                         }
2397
2398                         offset += SCTP_SIZE32(param_length);
2399                         if (offset >= asconf_limit) {
2400                                 /* no more data in the mbuf chain */
2401                                 break;
2402                         }
2403                         /* get pointer to next asconf param */
2404                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2405                 }
2406         }
2407
2408         /*
2409          * we want to find the sequences which consist of ADD -> DEL -> ADD
2410          * or DEL -> ADD
2411          */
2412         if (add_cnt > del_cnt ||
2413             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2414                 return (1);
2415         }
2416         return (0);
2417 }
2418
2419 static struct sockaddr *
2420 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2421 {
2422         struct sctp_vrf *vrf = NULL;
2423         struct sctp_ifn *sctp_ifn;
2424         struct sctp_ifa *sctp_ifa;
2425
2426         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2427                 SCTP_IPI_ADDR_RLOCK();
2428         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2429         if (vrf == NULL) {
2430                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2431                         SCTP_IPI_ADDR_RUNLOCK();
2432                 return (NULL);
2433         }
2434         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2435                 if (stcb->asoc.scope.loopback_scope == 0 &&
2436                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2437                         /* Skip if loopback_scope not set */
2438                         continue;
2439                 }
2440                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2441                         switch (sctp_ifa->address.sa.sa_family) {
2442 #ifdef INET
2443                         case AF_INET:
2444                                 if (stcb->asoc.scope.ipv4_addr_legal) {
2445                                         struct sockaddr_in *sin;
2446
2447                                         sin = &sctp_ifa->address.sin;
2448                                         if (sin->sin_addr.s_addr == 0) {
2449                                                 /* skip unspecifed addresses */
2450                                                 continue;
2451                                         }
2452                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
2453                                             &sin->sin_addr) != 0) {
2454                                                 continue;
2455                                         }
2456                                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2457                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2458                                                 continue;
2459
2460                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2461                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2462                                                 continue;
2463                                         /*
2464                                          * found a valid local v4 address to
2465                                          * use
2466                                          */
2467                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2468                                                 SCTP_IPI_ADDR_RUNLOCK();
2469                                         return (&sctp_ifa->address.sa);
2470                                 }
2471                                 break;
2472 #endif
2473 #ifdef INET6
2474                         case AF_INET6:
2475                                 if (stcb->asoc.scope.ipv6_addr_legal) {
2476                                         struct sockaddr_in6 *sin6;
2477
2478                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2479                                                 continue;
2480                                         }
2481
2482                                         sin6 = &sctp_ifa->address.sin6;
2483                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2484                                                 /*
2485                                                  * we skip unspecifed
2486                                                  * addresses
2487                                                  */
2488                                                 continue;
2489                                         }
2490                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
2491                                             &sin6->sin6_addr) != 0) {
2492                                                 continue;
2493                                         }
2494                                         if (stcb->asoc.scope.local_scope == 0 &&
2495                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2496                                                 continue;
2497                                         if (stcb->asoc.scope.site_scope == 0 &&
2498                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2499                                                 continue;
2500
2501                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2502                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2503                                                 continue;
2504                                         /*
2505                                          * found a valid local v6 address to
2506                                          * use
2507                                          */
2508                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2509                                                 SCTP_IPI_ADDR_RUNLOCK();
2510                                         return (&sctp_ifa->address.sa);
2511                                 }
2512                                 break;
2513 #endif
2514                         default:
2515                                 break;
2516                         }
2517                 }
2518         }
2519         /* no valid addresses found */
2520         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2521                 SCTP_IPI_ADDR_RUNLOCK();
2522         return (NULL);
2523 }
2524
2525 static struct sockaddr *
2526 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2527 {
2528         struct sctp_laddr *laddr;
2529
2530         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2531                 if (laddr->ifa == NULL) {
2532                         continue;
2533                 }
2534                 /* is the address restricted ? */
2535                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2536                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2537                         continue;
2538
2539                 /* found a valid local address to use */
2540                 return (&laddr->ifa->address.sa);
2541         }
2542         /* no valid addresses found */
2543         return (NULL);
2544 }
2545
2546 /*
2547  * builds an ASCONF chunk from queued ASCONF params.
2548  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2549  */
2550 struct mbuf *
2551 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2552 {
2553         struct mbuf *m_asconf, *m_asconf_chk;
2554         struct sctp_asconf_addr *aa;
2555         struct sctp_asconf_chunk *acp;
2556         struct sctp_asconf_paramhdr *aph;
2557         struct sctp_asconf_addr_param *aap;
2558         uint32_t p_length;
2559         uint32_t correlation_id = 1;    /* 0 is reserved... */
2560         caddr_t ptr, lookup_ptr;
2561         uint8_t lookup_used = 0;
2562
2563         /* are there any asconf params to send? */
2564         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2565                 if (aa->sent == 0)
2566                         break;
2567         }
2568         if (aa == NULL)
2569                 return (NULL);
2570
2571         /*
2572          * get a chunk header mbuf and a cluster for the asconf params since
2573          * it's simpler to fill in the asconf chunk header lookup address on
2574          * the fly
2575          */
2576         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA);
2577         if (m_asconf_chk == NULL) {
2578                 /* no mbuf's */
2579                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2580                     "compose_asconf: couldn't get chunk mbuf!\n");
2581                 return (NULL);
2582         }
2583         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
2584         if (m_asconf == NULL) {
2585                 /* no mbuf's */
2586                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2587                     "compose_asconf: couldn't get mbuf!\n");
2588                 sctp_m_freem(m_asconf_chk);
2589                 return (NULL);
2590         }
2591         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2592         SCTP_BUF_LEN(m_asconf) = 0;
2593         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2594         memset(acp, 0, sizeof(struct sctp_asconf_chunk));
2595         /* save pointers to lookup address and asconf params */
2596         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2597         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2598
2599         /* fill in chunk header info */
2600         acp->ch.chunk_type = SCTP_ASCONF;
2601         acp->ch.chunk_flags = 0;
2602         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2603         stcb->asoc.asconf_seq_out++;
2604
2605         /* add parameters... up to smallest MTU allowed */
2606         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2607                 if (aa->sent)
2608                         continue;
2609                 /* get the parameter length */
2610                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2611                 /* will it fit in current chunk? */
2612                 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) ||
2613                     (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) {
2614                         /* won't fit, so we're done with this chunk */
2615                         break;
2616                 }
2617                 /* assign (and store) a correlation id */
2618                 aa->ap.aph.correlation_id = correlation_id++;
2619
2620                 /*
2621                  * fill in address if we're doing a delete this is a simple
2622                  * way for us to fill in the correlation address, which
2623                  * should only be used by the peer if we're deleting our
2624                  * source address and adding a new address (e.g. renumbering
2625                  * case)
2626                  */
2627                 if (lookup_used == 0 &&
2628                     (aa->special_del == 0) &&
2629                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2630                         struct sctp_ipv6addr_param *lookup;
2631                         uint16_t p_size, addr_size;
2632
2633                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2634                         lookup->ph.param_type =
2635                             htons(aa->ap.addrp.ph.param_type);
2636                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2637                                 /* copy IPv6 address */
2638                                 p_size = sizeof(struct sctp_ipv6addr_param);
2639                                 addr_size = sizeof(struct in6_addr);
2640                         } else {
2641                                 /* copy IPv4 address */
2642                                 p_size = sizeof(struct sctp_ipv4addr_param);
2643                                 addr_size = sizeof(struct in_addr);
2644                         }
2645                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2646                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2647                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2648                         lookup_used = 1;
2649                 }
2650                 /* copy into current space */
2651                 memcpy(ptr, &aa->ap, p_length);
2652
2653                 /* network elements and update lengths */
2654                 aph = (struct sctp_asconf_paramhdr *)ptr;
2655                 aap = (struct sctp_asconf_addr_param *)ptr;
2656                 /* correlation_id is transparent to peer, no htonl needed */
2657                 aph->ph.param_type = htons(aph->ph.param_type);
2658                 aph->ph.param_length = htons(aph->ph.param_length);
2659                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2660                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2661
2662                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2663                 ptr += SCTP_SIZE32(p_length);
2664
2665                 /*
2666                  * these params are removed off the pending list upon
2667                  * getting an ASCONF-ACK back from the peer, just set flag
2668                  */
2669                 aa->sent = 1;
2670         }
2671         /* check to see if the lookup addr has been populated yet */
2672         if (lookup_used == 0) {
2673                 /* NOTE: if the address param is optional, can skip this... */
2674                 /* add any valid (existing) address... */
2675                 struct sctp_ipv6addr_param *lookup;
2676                 uint16_t p_size, addr_size;
2677                 struct sockaddr *found_addr;
2678                 caddr_t addr_ptr;
2679
2680                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2681                         found_addr = sctp_find_valid_localaddr(stcb,
2682                             addr_locked);
2683                 else
2684                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2685
2686                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2687                 if (found_addr != NULL) {
2688                         switch (found_addr->sa_family) {
2689 #ifdef INET6
2690                         case AF_INET6:
2691                                 /* copy IPv6 address */
2692                                 lookup->ph.param_type =
2693                                     htons(SCTP_IPV6_ADDRESS);
2694                                 p_size = sizeof(struct sctp_ipv6addr_param);
2695                                 addr_size = sizeof(struct in6_addr);
2696                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2697                                     found_addr)->sin6_addr;
2698                                 break;
2699 #endif
2700 #ifdef INET
2701                         case AF_INET:
2702                                 /* copy IPv4 address */
2703                                 lookup->ph.param_type =
2704                                     htons(SCTP_IPV4_ADDRESS);
2705                                 p_size = sizeof(struct sctp_ipv4addr_param);
2706                                 addr_size = sizeof(struct in_addr);
2707                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2708                                     found_addr)->sin_addr;
2709                                 break;
2710 #endif
2711                         default:
2712                                 p_size = 0;
2713                                 addr_size = 0;
2714                                 addr_ptr = NULL;
2715                                 break;
2716                         }
2717                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2718                         memcpy(lookup->addr, addr_ptr, addr_size);
2719                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2720                 } else {
2721                         /* uh oh... don't have any address?? */
2722                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2723                             "compose_asconf: no lookup addr!\n");
2724                         /* XXX for now, we send a IPv4 address of 0.0.0.0 */
2725                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2726                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2727                         memset(lookup->addr, 0, sizeof(struct in_addr));
2728                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2729                 }
2730         }
2731         /* chain it all together */
2732         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2733         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2734         acp->ch.chunk_length = htons(*retlen);
2735
2736         return (m_asconf_chk);
2737 }
2738
2739 /*
2740  * section to handle address changes before an association is up eg. changes
2741  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2742  */
2743
2744 /*
2745  * processes the (local) addresses in the INIT-ACK chunk
2746  */
2747 static void
2748 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2749     unsigned int offset, unsigned int length)
2750 {
2751         struct sctp_paramhdr tmp_param, *ph;
2752         uint16_t plen, ptype;
2753         struct sctp_ifa *sctp_ifa;
2754         union sctp_sockstore store;
2755 #ifdef INET6
2756         struct sctp_ipv6addr_param addr6_store;
2757 #endif
2758 #ifdef INET
2759         struct sctp_ipv4addr_param addr4_store;
2760 #endif
2761
2762         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2763         if (stcb == NULL)       /* Un-needed check for SA */
2764                 return;
2765
2766         /* convert to upper bound */
2767         length += offset;
2768
2769         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2770                 return;
2771         }
2772         /* go through the addresses in the init-ack */
2773         ph = (struct sctp_paramhdr *)
2774             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2775             (uint8_t *)&tmp_param);
2776         while (ph != NULL) {
2777                 ptype = ntohs(ph->param_type);
2778                 plen = ntohs(ph->param_length);
2779                 switch (ptype) {
2780 #ifdef INET6
2781                 case SCTP_IPV6_ADDRESS:
2782                         {
2783                                 struct sctp_ipv6addr_param *a6p;
2784
2785                                 /* get the entire IPv6 address param */
2786                                 a6p = (struct sctp_ipv6addr_param *)
2787                                     sctp_m_getptr(m, offset,
2788                                     sizeof(struct sctp_ipv6addr_param),
2789                                     (uint8_t *)&addr6_store);
2790                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2791                                     a6p == NULL) {
2792                                         return;
2793                                 }
2794                                 memset(&store, 0, sizeof(union sctp_sockstore));
2795                                 store.sin6.sin6_family = AF_INET6;
2796                                 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2797                                 store.sin6.sin6_port = stcb->rport;
2798                                 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr));
2799                                 break;
2800                         }
2801 #endif
2802 #ifdef INET
2803                 case SCTP_IPV4_ADDRESS:
2804                         {
2805                                 struct sctp_ipv4addr_param *a4p;
2806
2807                                 /* get the entire IPv4 address param */
2808                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2809                                     sizeof(struct sctp_ipv4addr_param),
2810                                     (uint8_t *)&addr4_store);
2811                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2812                                     a4p == NULL) {
2813                                         return;
2814                                 }
2815                                 memset(&store, 0, sizeof(union sctp_sockstore));
2816                                 store.sin.sin_family = AF_INET;
2817                                 store.sin.sin_len = sizeof(struct sockaddr_in);
2818                                 store.sin.sin_port = stcb->rport;
2819                                 store.sin.sin_addr.s_addr = a4p->addr;
2820                                 break;
2821                         }
2822 #endif
2823                 default:
2824                         goto next_addr;
2825                 }
2826
2827                 /* see if this address really (still) exists */
2828                 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id,
2829                     SCTP_ADDR_NOT_LOCKED);
2830                 if (sctp_ifa == NULL) {
2831                         /* address doesn't exist anymore */
2832                         int status;
2833
2834                         /* are ASCONFs allowed ? */
2835                         if ((sctp_is_feature_on(stcb->sctp_ep,
2836                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2837                             stcb->asoc.asconf_supported) {
2838                                 /* queue an ASCONF DEL_IP_ADDRESS */
2839                                 status = sctp_asconf_queue_sa_delete(stcb, &store.sa);
2840                                 /*
2841                                  * if queued ok, and in correct state, send
2842                                  * out the ASCONF.
2843                                  */
2844                                 if (status == 0 &&
2845                                     SCTP_GET_STATE(&stcb->asoc) ==
2846                                     SCTP_STATE_OPEN) {
2847 #ifdef SCTP_TIMER_BASED_ASCONF
2848                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2849                                             stcb->sctp_ep, stcb,
2850                                             stcb->asoc.primary_destination);
2851 #else
2852                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2853 #endif
2854                                 }
2855                         }
2856                 }
2857
2858 next_addr:
2859                 /*
2860                  * Sanity check:  Make sure the length isn't 0, otherwise
2861                  * we'll be stuck in this loop for a long time...
2862                  */
2863                 if (SCTP_SIZE32(plen) == 0) {
2864                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2865                             plen, ptype);
2866                         return;
2867                 }
2868                 /* get next parameter */
2869                 offset += SCTP_SIZE32(plen);
2870                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2871                         return;
2872                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2873                     sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2874         }                       /* while */
2875 }
2876
2877 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2878 /*
2879  * checks to see if a specific address is in the initack address list returns
2880  * 1 if found, 0 if not
2881  */
2882 static uint32_t
2883 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
2884 {
2885         struct sctp_paramhdr tmp_param, *ph;
2886         uint16_t plen, ptype;
2887 #ifdef INET
2888         struct sockaddr_in *sin;
2889         struct sctp_ipv4addr_param *a4p;
2890         struct sctp_ipv6addr_param addr4_store;
2891 #endif
2892 #ifdef INET6
2893         struct sockaddr_in6 *sin6;
2894         struct sctp_ipv6addr_param *a6p;
2895         struct sctp_ipv6addr_param addr6_store;
2896         struct sockaddr_in6 sin6_tmp;
2897 #endif
2898
2899         switch (sa->sa_family) {
2900 #ifdef INET
2901         case AF_INET:
2902                 break;
2903 #endif
2904 #ifdef INET6
2905         case AF_INET6:
2906                 break;
2907 #endif
2908         default:
2909                 return (0);
2910         }
2911
2912         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2913         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2914         /* convert to upper bound */
2915         length += offset;
2916
2917         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2918                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2919                     "find_initack_addr: invalid offset?\n");
2920                 return (0);
2921         }
2922         /* go through the addresses in the init-ack */
2923         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2924             sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2925         while (ph != NULL) {
2926                 ptype = ntohs(ph->param_type);
2927                 plen = ntohs(ph->param_length);
2928                 switch (ptype) {
2929 #ifdef INET6
2930                 case SCTP_IPV6_ADDRESS:
2931                         if (sa->sa_family == AF_INET6) {
2932                                 /* get the entire IPv6 address param */
2933                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
2934                                         break;
2935                                 }
2936                                 /* get the entire IPv6 address param */
2937                                 a6p = (struct sctp_ipv6addr_param *)
2938                                     sctp_m_getptr(m, offset,
2939                                     sizeof(struct sctp_ipv6addr_param),
2940                                     (uint8_t *)&addr6_store);
2941                                 if (a6p == NULL) {
2942                                         return (0);
2943                                 }
2944                                 sin6 = (struct sockaddr_in6 *)sa;
2945                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2946                                         /* create a copy and clear scope */
2947                                         memcpy(&sin6_tmp, sin6,
2948                                             sizeof(struct sockaddr_in6));
2949                                         sin6 = &sin6_tmp;
2950                                         in6_clearscope(&sin6->sin6_addr);
2951                                 }
2952                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
2953                                     sizeof(struct in6_addr)) == 0) {
2954                                         /* found it */
2955                                         return (1);
2956                                 }
2957                         }
2958                         break;
2959 #endif                          /* INET6 */
2960 #ifdef INET
2961                 case SCTP_IPV4_ADDRESS:
2962                         if (sa->sa_family == AF_INET) {
2963                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
2964                                         break;
2965                                 }
2966                                 /* get the entire IPv4 address param */
2967                                 a4p = (struct sctp_ipv4addr_param *)
2968                                     sctp_m_getptr(m, offset,
2969                                     sizeof(struct sctp_ipv4addr_param),
2970                                     (uint8_t *)&addr4_store);
2971                                 if (a4p == NULL) {
2972                                         return (0);
2973                                 }
2974                                 sin = (struct sockaddr_in *)sa;
2975                                 if (sin->sin_addr.s_addr == a4p->addr) {
2976                                         /* found it */
2977                                         return (1);
2978                                 }
2979                         }
2980                         break;
2981 #endif
2982                 default:
2983                         break;
2984                 }
2985                 /* get next parameter */
2986                 offset += SCTP_SIZE32(plen);
2987                 if (offset + sizeof(struct sctp_paramhdr) > length) {
2988                         return (0);
2989                 }
2990                 ph = (struct sctp_paramhdr *)
2991                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2992                     (uint8_t *)&tmp_param);
2993         }                       /* while */
2994         /* not found! */
2995         return (0);
2996 }
2997
2998 /*
2999  * makes sure that the current endpoint local addr list is consistent with
3000  * the new association (eg. subset bound, asconf allowed) adds addresses as
3001  * necessary
3002  */
3003 static void
3004 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3005     int length, struct sockaddr *init_addr)
3006 {
3007         struct sctp_laddr *laddr;
3008
3009         /* go through the endpoint list */
3010         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3011                 /* be paranoid and validate the laddr */
3012                 if (laddr->ifa == NULL) {
3013                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3014                             "check_addr_list_ep: laddr->ifa is NULL");
3015                         continue;
3016                 }
3017                 if (laddr->ifa == NULL) {
3018                         SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3019                         continue;
3020                 }
3021                 /* do i have it implicitly? */
3022                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3023                         continue;
3024                 }
3025                 /* check to see if in the init-ack */
3026                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3027                         /* try to add it */
3028                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3029                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3030                 }
3031         }
3032 }
3033
3034 /*
3035  * makes sure that the current kernel address list is consistent with the new
3036  * association (with all addrs bound) adds addresses as necessary
3037  */
3038 static void
3039 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3040     int length, struct sockaddr *init_addr,
3041     uint16_t local_scope, uint16_t site_scope,
3042     uint16_t ipv4_scope, uint16_t loopback_scope)
3043 {
3044         struct sctp_vrf *vrf = NULL;
3045         struct sctp_ifn *sctp_ifn;
3046         struct sctp_ifa *sctp_ifa;
3047         uint32_t vrf_id;
3048 #ifdef INET
3049         struct sockaddr_in *sin;
3050 #endif
3051 #ifdef INET6
3052         struct sockaddr_in6 *sin6;
3053 #endif
3054
3055         if (stcb) {
3056                 vrf_id = stcb->asoc.vrf_id;
3057         } else {
3058                 return;
3059         }
3060         SCTP_IPI_ADDR_RLOCK();
3061         vrf = sctp_find_vrf(vrf_id);
3062         if (vrf == NULL) {
3063                 SCTP_IPI_ADDR_RUNLOCK();
3064                 return;
3065         }
3066         /* go through all our known interfaces */
3067         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3068                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3069                         /* skip loopback interface */
3070                         continue;
3071                 }
3072                 /* go through each interface address */
3073                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3074                         /* do i have it implicitly? */
3075                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3076                                 continue;
3077                         }
3078                         switch (sctp_ifa->address.sa.sa_family) {
3079 #ifdef INET
3080                         case AF_INET:
3081                                 sin = &sctp_ifa->address.sin;
3082                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3083                                     &sin->sin_addr) != 0) {
3084                                         continue;
3085                                 }
3086                                 if ((ipv4_scope == 0) &&
3087                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3088                                         /* private address not in scope */
3089                                         continue;
3090                                 }
3091                                 break;
3092 #endif
3093 #ifdef INET6
3094                         case AF_INET6:
3095                                 sin6 = &sctp_ifa->address.sin6;
3096                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3097                                     &sin6->sin6_addr) != 0) {
3098                                         continue;
3099                                 }
3100                                 if ((local_scope == 0) &&
3101                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3102                                         continue;
3103                                 }
3104                                 if ((site_scope == 0) &&
3105                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3106                                         continue;
3107                                 }
3108                                 break;
3109 #endif
3110                         default:
3111                                 break;
3112                         }
3113                         /* check to see if in the init-ack */
3114                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3115                                 /* try to add it */
3116                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3117                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3118                                     SCTP_ADDR_LOCKED);
3119                         }
3120                 }               /* end foreach ifa */
3121         }                       /* end foreach ifn */
3122         SCTP_IPI_ADDR_RUNLOCK();
3123 }
3124
3125 /*
3126  * validates an init-ack chunk (from a cookie-echo) with current addresses
3127  * adds addresses from the init-ack into our local address list, if needed
3128  * queues asconf adds/deletes addresses as needed and makes appropriate list
3129  * changes for source address selection m, offset: points to the start of the
3130  * address list in an init-ack chunk length: total length of the address
3131  * params only init_addr: address where my INIT-ACK was sent from
3132  */
3133 void
3134 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3135     int length, struct sockaddr *init_addr,
3136     uint16_t local_scope, uint16_t site_scope,
3137     uint16_t ipv4_scope, uint16_t loopback_scope)
3138 {
3139         /* process the local addresses in the initack */
3140         sctp_process_initack_addresses(stcb, m, offset, length);
3141
3142         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3143                 /* bound all case */
3144                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3145                     local_scope, site_scope, ipv4_scope, loopback_scope);
3146         } else {
3147                 /* subset bound case */
3148                 if (sctp_is_feature_on(stcb->sctp_ep,
3149                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3150                         /* asconf's allowed */
3151                         sctp_check_address_list_ep(stcb, m, offset, length,
3152                             init_addr);
3153                 }
3154                 /* else, no asconfs allowed, so what we sent is what we get */
3155         }
3156 }
3157
3158 /*
3159  * sctp_bindx() support
3160  */
3161 uint32_t
3162 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3163     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3164 {
3165         struct sctp_ifa *ifa;
3166         struct sctp_laddr *laddr, *nladdr;
3167
3168         if (sa->sa_len == 0) {
3169                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3170                 return (EINVAL);
3171         }
3172         if (sctp_ifap) {
3173                 ifa = sctp_ifap;
3174         } else if (type == SCTP_ADD_IP_ADDRESS) {
3175                 /* For an add the address MUST be on the system */
3176                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3177         } else if (type == SCTP_DEL_IP_ADDRESS) {
3178                 /* For a delete we need to find it in the inp */
3179                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3180         } else {
3181                 ifa = NULL;
3182         }
3183         if (ifa != NULL) {
3184                 if (type == SCTP_ADD_IP_ADDRESS) {
3185                         sctp_add_local_addr_ep(inp, ifa, type);
3186                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3187                         if (inp->laddr_count < 2) {
3188                                 /* can't delete the last local address */
3189                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3190                                 return (EINVAL);
3191                         }
3192                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3193                             sctp_nxt_addr) {
3194                                 if (ifa == laddr->ifa) {
3195                                         /* Mark in the delete */
3196                                         laddr->action = type;
3197                                 }
3198                         }
3199                 }
3200                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3201                         /*
3202                          * There is no need to start the iterator if the inp
3203                          * has no associations.
3204                          */
3205                         if (type == SCTP_DEL_IP_ADDRESS) {
3206                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3207                                         if (laddr->ifa == ifa) {
3208                                                 sctp_del_local_addr_ep(inp, ifa);
3209                                         }
3210                                 }
3211                         }
3212                 } else {
3213                         struct sctp_asconf_iterator *asc;
3214                         struct sctp_laddr *wi;
3215                         int ret;
3216
3217                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3218                             sizeof(struct sctp_asconf_iterator),
3219                             SCTP_M_ASC_IT);
3220                         if (asc == NULL) {
3221                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3222                                 return (ENOMEM);
3223                         }
3224                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3225                         if (wi == NULL) {
3226                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3227                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3228                                 return (ENOMEM);
3229                         }
3230                         LIST_INIT(&asc->list_of_work);
3231                         asc->cnt = 1;
3232                         SCTP_INCR_LADDR_COUNT();
3233                         wi->ifa = ifa;
3234                         wi->action = type;
3235                         atomic_add_int(&ifa->refcount, 1);
3236                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3237                         ret = sctp_initiate_iterator(sctp_asconf_iterator_ep,
3238                             sctp_asconf_iterator_stcb,
3239                             sctp_asconf_iterator_ep_end,
3240                             SCTP_PCB_ANY_FLAGS,
3241                             SCTP_PCB_ANY_FEATURES,
3242                             SCTP_ASOC_ANY_STATE,
3243                             (void *)asc, 0,
3244                             sctp_asconf_iterator_end, inp, 0);
3245                         if (ret) {
3246                                 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n");
3247                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT);
3248                                 sctp_asconf_iterator_end(asc, 0);
3249                                 return (EFAULT);
3250                         }
3251                 }
3252                 return (0);
3253         } else {
3254                 /* invalid address! */
3255                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3256                 return (EADDRNOTAVAIL);
3257         }
3258 }
3259
3260 void
3261 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3262     struct sctp_nets *net)
3263 {
3264         struct sctp_asconf_addr *aa;
3265         struct sctp_ifa *sctp_ifap;
3266         struct sctp_asconf_tag_param *vtag;
3267 #ifdef INET
3268         struct sockaddr_in *to;
3269 #endif
3270 #ifdef INET6
3271         struct sockaddr_in6 *to6;
3272 #endif
3273         if (net == NULL) {
3274                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3275                 return;
3276         }
3277         if (stcb == NULL) {
3278                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3279                 return;
3280         }
3281         /*
3282          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3283          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3284          */
3285         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3286             SCTP_M_ASC_ADDR);
3287         if (aa == NULL) {
3288                 /* didn't get memory */
3289                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3290                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3291                 return;
3292         }
3293         aa->special_del = 0;
3294         /* fill in asconf address parameter fields */
3295         /* top level elements are "networked" during send */
3296         aa->ifa = NULL;
3297         aa->sent = 0;           /* clear sent flag */
3298         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3299         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3300         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3301         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3302         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3303         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3304
3305         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3306             SCTP_M_ASC_ADDR);
3307         if (aa == NULL) {
3308                 /* didn't get memory */
3309                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3310                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3311                 return;
3312         }
3313         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3314         /* fill in asconf address parameter fields */
3315         /* ADD(0.0.0.0) */
3316         switch (net->ro._l_addr.sa.sa_family) {
3317 #ifdef INET
3318         case AF_INET:
3319                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3320                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3321                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3322                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3323                 /* No need to add an address, we are using 0.0.0.0 */
3324                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3325                 break;
3326 #endif
3327 #ifdef INET6
3328         case AF_INET6:
3329                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3330                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3331                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3332                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3333                 /* No need to add an address, we are using 0.0.0.0 */
3334                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3335                 break;
3336 #endif
3337         default:
3338                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3339                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3340                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3341                 return;
3342         }
3343         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3344             SCTP_M_ASC_ADDR);
3345         if (aa == NULL) {
3346                 /* didn't get memory */
3347                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3348                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3349                 return;
3350         }
3351         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3352         /* fill in asconf address parameter fields */
3353         /* ADD(0.0.0.0) */
3354         switch (net->ro._l_addr.sa.sa_family) {
3355 #ifdef INET
3356         case AF_INET:
3357                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3358                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3359                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3360                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3361                 /* No need to add an address, we are using 0.0.0.0 */
3362                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3363                 break;
3364 #endif
3365 #ifdef INET6
3366         case AF_INET6:
3367                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3368                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3369                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3370                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3371                 /* No need to add an address, we are using 0.0.0.0 */
3372                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3373                 break;
3374 #endif
3375         default:
3376                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3377                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3378                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3379                 return;
3380         }
3381         /* Now we must hunt the addresses and add all global addresses */
3382         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3383                 struct sctp_vrf *vrf = NULL;
3384                 struct sctp_ifn *sctp_ifnp;
3385                 uint32_t vrf_id;
3386
3387                 vrf_id = stcb->sctp_ep->def_vrf_id;
3388                 vrf = sctp_find_vrf(vrf_id);
3389                 if (vrf == NULL) {
3390                         goto skip_rest;
3391                 }
3392
3393                 SCTP_IPI_ADDR_RLOCK();
3394                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3395                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3396                                 switch (sctp_ifap->address.sa.sa_family) {
3397 #ifdef INET
3398                                 case AF_INET:
3399                                         to = &sctp_ifap->address.sin;
3400                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3401                                             &to->sin_addr) != 0) {
3402                                                 continue;
3403                                         }
3404                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3405                                                 continue;
3406                                         }
3407                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3408                                                 continue;
3409                                         }
3410                                         break;
3411 #endif
3412 #ifdef INET6
3413                                 case AF_INET6:
3414                                         to6 = &sctp_ifap->address.sin6;
3415                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3416                                             &to6->sin6_addr) != 0) {
3417                                                 continue;
3418                                         }
3419                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3420                                                 continue;
3421                                         }
3422                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3423                                                 continue;
3424                                         }
3425                                         break;
3426 #endif
3427                                 default:
3428                                         continue;
3429                                 }
3430                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3431                         }
3432                 }
3433                 SCTP_IPI_ADDR_RUNLOCK();
3434         } else {
3435                 struct sctp_laddr *laddr;
3436
3437                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3438                         if (laddr->ifa == NULL) {
3439                                 continue;
3440                         }
3441                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3442                                 /*
3443                                  * Address being deleted by the system, dont
3444                                  * list.
3445                                  */
3446                                 continue;
3447                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3448                                 /*
3449                                  * Address being deleted on this ep don't
3450                                  * list.
3451                                  */
3452                                 continue;
3453                         }
3454                         sctp_ifap = laddr->ifa;
3455                         switch (sctp_ifap->address.sa.sa_family) {
3456 #ifdef INET
3457                         case AF_INET:
3458                                 to = &sctp_ifap->address.sin;
3459                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3460                                         continue;
3461                                 }
3462                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3463                                         continue;
3464                                 }
3465                                 break;
3466 #endif
3467 #ifdef INET6
3468                         case AF_INET6:
3469                                 to6 = &sctp_ifap->address.sin6;
3470                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3471                                         continue;
3472                                 }
3473                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3474                                         continue;
3475                                 }
3476                                 break;
3477 #endif
3478                         default:
3479                                 continue;
3480                         }
3481                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3482                 }
3483         }
3484 skip_rest:
3485         /* Now we must send the asconf into the queue */
3486         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3487 }