sys/netinet/sctp_asconf.c

   1 /*-
   2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * a) Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  *
  10  * b) Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *   the documentation and/or other materials provided with the distribution.
  13  *
  14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  28  * THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /* $KAME: sctp_asconf.c,v 1.24 2005/03/06 16:04:16 itojun Exp $  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35 #include <netinet/sctp_os.h>
  36 #include <netinet/sctp_var.h>
  37 #include <netinet/sctp_sysctl.h>
  38 #include <netinet/sctp_pcb.h>
  39 #include <netinet/sctp_header.h>
  40 #include <netinet/sctputil.h>
  41 #include <netinet/sctp_output.h>
  42 #include <netinet/sctp_asconf.h>
  43 #include <netinet/sctp_timer.h>
  44
  45 /*
  46  * debug flags:
  47  * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
  48  * SCTP_DEBUG_ASCONF2: detailed info
  49  */
  50 #ifdef SCTP_DEBUG
  51 #endif                          /* SCTP_DEBUG */
  52
  53
  54 static void
  55 sctp_asconf_get_source_ip(struct mbuf *m, struct sockaddr *sa)
  56 {
  57         struct ip *iph;
  58         struct sockaddr_in *sin;
  59
  60 #ifdef INET6
  61         struct sockaddr_in6 *sin6;
  62
  63 #endif
  64
  65         iph = mtod(m, struct ip *);
  66         if (iph->ip_v == IPVERSION) {
  67                 /* IPv4 source */
  68                 sin = (struct sockaddr_in *)sa;
  69                 bzero(sin, sizeof(*sin));
  70                 sin->sin_family = AF_INET;
  71                 sin->sin_len = sizeof(struct sockaddr_in);
  72                 sin->sin_port = 0;
  73                 sin->sin_addr.s_addr = iph->ip_src.s_addr;
  74                 return;
  75         }
  76 #ifdef INET6
  77         else if (iph->ip_v == (IPV6_VERSION >> 4)) {
  78                 /* IPv6 source */
  79                 struct ip6_hdr *ip6;
  80
  81                 sin6 = (struct sockaddr_in6 *)sa;
  82                 bzero(sin6, sizeof(*sin6));
  83                 sin6->sin6_family = AF_INET6;
  84                 sin6->sin6_len = sizeof(struct sockaddr_in6);
  85                 sin6->sin6_port = 0;
  86                 ip6 = mtod(m, struct ip6_hdr *);
  87                 sin6->sin6_addr = ip6->ip6_src;
  88                 return;
  89         }
  90 #endif                          /* INET6 */
  91         else
  92                 return;
  93 }
  94
  95 /*
  96  * draft-ietf-tsvwg-addip-sctp
  97  *
  98  * An ASCONF parameter queue exists per asoc which holds the pending address
  99  * operations.  Lists are updated upon receipt of ASCONF-ACK.
 100  *
 101  * A restricted_addrs list exists per assoc to hold local addresses that are
 102  * not (yet) usable by the assoc as a source address.  These addresses are
 103  * either pending an ASCONF operation (and exist on the ASCONF parameter
 104  * queue), or they are permanently restricted (the peer has returned an
 105  * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
 106  *
 107  * Deleted addresses are always immediately removed from the lists as they will
 108  * (shortly) no longer exist in the kernel.  We send ASCONFs as a courtesy,
 109  * only if allowed.
 110  */
 111
 112 /*
 113  * ASCONF parameter processing.
 114  * response_required: set if a reply is required (eg. SUCCESS_REPORT).
 115  * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
 116  * FIX: allocating this many mbufs on the fly is pretty inefficient...
 117  */
 118 static struct mbuf *
 119 sctp_asconf_success_response(uint32_t id)
 120 {
 121         struct mbuf *m_reply = NULL;
 122         struct sctp_asconf_paramhdr *aph;
 123
 124         m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
 125             0, M_DONTWAIT, 1, MT_DATA);
 126         if (m_reply == NULL) {
 127                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 128                     "asconf_success_response: couldn't get mbuf!\n");
 129                 return NULL;
 130         }
 131         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 132         aph->correlation_id = id;
 133         aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
 134         aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
 135         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 136         aph->ph.param_length = htons(aph->ph.param_length);
 137
 138         return m_reply;
 139 }
 140
 141 static struct mbuf *
 142 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv,
 143     uint16_t tlv_length)
 144 {
 145         struct mbuf *m_reply = NULL;
 146         struct sctp_asconf_paramhdr *aph;
 147         struct sctp_error_cause *error;
 148         uint8_t *tlv;
 149
 150         m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) +
 151             tlv_length +
 152             sizeof(struct sctp_error_cause)),
 153             0, M_DONTWAIT, 1, MT_DATA);
 154         if (m_reply == NULL) {
 155                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 156                     "asconf_error_response: couldn't get mbuf!\n");
 157                 return NULL;
 158         }
 159         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 160         error = (struct sctp_error_cause *)(aph + 1);
 161
 162         aph->correlation_id = id;
 163         aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
 164         error->code = htons(cause);
 165         error->length = tlv_length + sizeof(struct sctp_error_cause);
 166         aph->ph.param_length = error->length +
 167             sizeof(struct sctp_asconf_paramhdr);
 168
 169         if (aph->ph.param_length > MLEN) {
 170                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 171                     "asconf_error_response: tlv_length (%xh) too big\n",
 172                     tlv_length);
 173                 sctp_m_freem(m_reply);  /* discard */
 174                 return NULL;
 175         }
 176         if (error_tlv != NULL) {
 177                 tlv = (uint8_t *) (error + 1);
 178                 memcpy(tlv, error_tlv, tlv_length);
 179         }
 180         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 181         error->length = htons(error->length);
 182         aph->ph.param_length = htons(aph->ph.param_length);
 183
 184         return m_reply;
 185 }
 186
 187 static struct mbuf *
 188 sctp_process_asconf_add_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
 189     struct sctp_tcb *stcb, int response_required)
 190 {
 191         struct mbuf *m_reply = NULL;
 192         struct sockaddr_storage sa_source, sa_store;
 193         struct sctp_ipv4addr_param *v4addr;
 194         uint16_t param_type, param_length, aparam_length;
 195         struct sockaddr *sa;
 196         struct sockaddr_in *sin;
 197         int zero_address = 0;
 198
 199 #ifdef INET6
 200         struct sockaddr_in6 *sin6;
 201         struct sctp_ipv6addr_param *v6addr;
 202
 203 #endif                          /* INET6 */
 204
 205         aparam_length = ntohs(aph->ph.param_length);
 206         v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
 207 #ifdef INET6
 208         v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
 209 #endif                          /* INET6 */
 210         param_type = ntohs(v4addr->ph.param_type);
 211         param_length = ntohs(v4addr->ph.param_length);
 212
 213         sa = (struct sockaddr *)&sa_store;
 214         switch (param_type) {
 215         case SCTP_IPV4_ADDRESS:
 216                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 217                         /* invalid param size */
 218                         return NULL;
 219                 }
 220                 sin = (struct sockaddr_in *)&sa_store;
 221                 bzero(sin, sizeof(*sin));
 222                 sin->sin_family = AF_INET;
 223                 sin->sin_len = sizeof(struct sockaddr_in);
 224                 sin->sin_port = stcb->rport;
 225                 sin->sin_addr.s_addr = v4addr->addr;
 226                 if (sin->sin_addr.s_addr == INADDR_ANY)
 227                         zero_address = 1;
 228                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 229                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 230                 break;
 231         case SCTP_IPV6_ADDRESS:
 232 #ifdef INET6
 233                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 234                         /* invalid param size */
 235                         return NULL;
 236                 }
 237                 sin6 = (struct sockaddr_in6 *)&sa_store;
 238                 bzero(sin6, sizeof(*sin6));
 239                 sin6->sin6_family = AF_INET6;
 240                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 241                 sin6->sin6_port = stcb->rport;
 242                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 243                     sizeof(struct in6_addr));
 244                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 245                         zero_address = 1;
 246                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 247                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 248 #else
 249                 /* IPv6 not enabled! */
 250                 /* FIX ME: currently sends back an invalid param error */
 251                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 252                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, aparam_length);
 253                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 254                     "process_asconf_add_ip: v6 disabled- skipping ");
 255                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 256                 return m_reply;
 257 #endif
 258                 break;
 259         default:
 260                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 261                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 262                     aparam_length);
 263                 return m_reply;
 264         }                       /* end switch */
 265
 266         /* if 0.0.0.0/::0, add the source address instead */
 267         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 268                 sa = (struct sockaddr *)&sa_source;
 269                 sctp_asconf_get_source_ip(m, sa);
 270                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 271                     "process_asconf_add_ip: using source addr ");
 272                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 273         }
 274         /* add the address */
 275         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE,
 276             SCTP_ADDR_DYNAMIC_ADDED) != 0) {
 277                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 278                     "process_asconf_add_ip: error adding address\n");
 279                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 280                     SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph,
 281                     aparam_length);
 282         } else {
 283                 /* notify upper layer */
 284                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 285                 if (response_required) {
 286                         m_reply =
 287                             sctp_asconf_success_response(aph->correlation_id);
 288                 }
 289                 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
 290                     NULL, SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1);
 291                 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
 292                     stcb, NULL);
 293         }
 294
 295         return m_reply;
 296 }
 297
 298 static int
 299 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
 300 {
 301         struct sctp_nets *src_net, *net;
 302
 303         /* make sure the source address exists as a destination net */
 304         src_net = sctp_findnet(stcb, src);
 305         if (src_net == NULL) {
 306                 /* not found */
 307                 return -1;
 308         }
 309         /* delete all destination addresses except the source */
 310         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 311                 if (net != src_net) {
 312                         /* delete this address */
 313                         sctp_remove_net(stcb, net);
 314                         SCTPDBG(SCTP_DEBUG_ASCONF1,
 315                             "asconf_del_remote_addrs_except: deleting ");
 316                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
 317                             (struct sockaddr *)&net->ro._l_addr);
 318                         /* notify upper layer */
 319                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
 320                             (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
 321                 }
 322         }
 323         return 0;
 324 }
 325
 326 static struct mbuf *
 327 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
 328     struct sctp_tcb *stcb, int response_required)
 329 {
 330         struct mbuf *m_reply = NULL;
 331         struct sockaddr_storage sa_source, sa_store;
 332         struct sctp_ipv4addr_param *v4addr;
 333         uint16_t param_type, param_length, aparam_length;
 334         struct sockaddr *sa;
 335         struct sockaddr_in *sin;
 336         int zero_address = 0;
 337         int result;
 338
 339 #ifdef INET6
 340         struct sockaddr_in6 *sin6;
 341         struct sctp_ipv6addr_param *v6addr;
 342
 343 #endif                          /* INET6 */
 344
 345         /* get the source IP address for src and 0.0.0.0/::0 delete checks */
 346         sctp_asconf_get_source_ip(m, (struct sockaddr *)&sa_source);
 347
 348         aparam_length = ntohs(aph->ph.param_length);
 349         v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
 350 #ifdef INET6
 351         v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
 352 #endif                          /* INET6 */
 353         param_type = ntohs(v4addr->ph.param_type);
 354         param_length = ntohs(v4addr->ph.param_length);
 355
 356         sa = (struct sockaddr *)&sa_store;
 357         switch (param_type) {
 358         case SCTP_IPV4_ADDRESS:
 359                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 360                         /* invalid param size */
 361                         return NULL;
 362                 }
 363                 sin = (struct sockaddr_in *)&sa_store;
 364                 bzero(sin, sizeof(*sin));
 365                 sin->sin_family = AF_INET;
 366                 sin->sin_len = sizeof(struct sockaddr_in);
 367                 sin->sin_port = stcb->rport;
 368                 sin->sin_addr.s_addr = v4addr->addr;
 369                 if (sin->sin_addr.s_addr == INADDR_ANY)
 370                         zero_address = 1;
 371                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 372                     "process_asconf_delete_ip: deleting ");
 373                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 374                 break;
 375         case SCTP_IPV6_ADDRESS:
 376                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 377                         /* invalid param size */
 378                         return NULL;
 379                 }
 380 #ifdef INET6
 381                 sin6 = (struct sockaddr_in6 *)&sa_store;
 382                 bzero(sin6, sizeof(*sin6));
 383                 sin6->sin6_family = AF_INET6;
 384                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 385                 sin6->sin6_port = stcb->rport;
 386                 memcpy(&sin6->sin6_addr, v6addr->addr,
 387                     sizeof(struct in6_addr));
 388                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 389                         zero_address = 1;
 390                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 391                     "process_asconf_delete_ip: deleting ");
 392                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 393 #else
 394                 /* IPv6 not enabled!  No "action" needed; just ack it */
 395                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 396                     "process_asconf_delete_ip: v6 disabled- ignoring: ");
 397                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 398                 /* just respond with a "success" ASCONF-ACK */
 399                 return NULL;
 400 #endif
 401                 break;
 402         default:
 403                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 404                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 405                     aparam_length);
 406                 return m_reply;
 407         }
 408
 409         /* make sure the source address is not being deleted */
 410         if (sctp_cmpaddr(sa, (struct sockaddr *)&sa_source)) {
 411                 /* trying to delete the source address! */
 412                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
 413                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 414                     SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph,
 415                     aparam_length);
 416                 return m_reply;
 417         }
 418         /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
 419         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 420                 result = sctp_asconf_del_remote_addrs_except(stcb,
 421                     (struct sockaddr *)&sa_source);
 422
 423                 if (result) {
 424                         /* src address did not exist? */
 425                         SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
 426                         /* what error to reply with?? */
 427                         m_reply =
 428                             sctp_asconf_error_response(aph->correlation_id,
 429                             SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph,
 430                             aparam_length);
 431                 } else if (response_required) {
 432                         m_reply =
 433                             sctp_asconf_success_response(aph->correlation_id);
 434                 }
 435                 return m_reply;
 436         }
 437         /* delete the address */
 438         result = sctp_del_remote_addr(stcb, sa);
 439         /*
 440          * note if result == -2, the address doesn't exist in the asoc but
 441          * since it's being deleted anyways, we just ack the delete -- but
 442          * this probably means something has already gone awry
 443          */
 444         if (result == -1) {
 445                 /* only one address in the asoc */
 446                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
 447                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 448                     SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph,
 449                     aparam_length);
 450         } else {
 451                 if (response_required) {
 452                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 453                 }
 454                 /* notify upper layer */
 455                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 456         }
 457         return m_reply;
 458 }
 459
 460 static struct mbuf *
 461 sctp_process_asconf_set_primary(struct mbuf *m,
 462     struct sctp_asconf_paramhdr *aph,
 463     struct sctp_tcb *stcb, int response_required)
 464 {
 465         struct mbuf *m_reply = NULL;
 466         struct sockaddr_storage sa_source, sa_store;
 467         struct sctp_ipv4addr_param *v4addr;
 468         uint16_t param_type, param_length, aparam_length;
 469         struct sockaddr *sa;
 470         struct sockaddr_in *sin;
 471         int zero_address = 0;
 472
 473 #ifdef INET6
 474         struct sockaddr_in6 *sin6;
 475         struct sctp_ipv6addr_param *v6addr;
 476
 477 #endif                          /* INET6 */
 478
 479         aparam_length = ntohs(aph->ph.param_length);
 480         v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
 481 #ifdef INET6
 482         v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
 483 #endif                          /* INET6 */
 484         param_type = ntohs(v4addr->ph.param_type);
 485         param_length = ntohs(v4addr->ph.param_length);
 486
 487         sa = (struct sockaddr *)&sa_store;
 488         switch (param_type) {
 489         case SCTP_IPV4_ADDRESS:
 490                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 491                         /* invalid param size */
 492                         return NULL;
 493                 }
 494                 sin = (struct sockaddr_in *)&sa_store;
 495                 bzero(sin, sizeof(*sin));
 496                 sin->sin_family = AF_INET;
 497                 sin->sin_len = sizeof(struct sockaddr_in);
 498                 sin->sin_addr.s_addr = v4addr->addr;
 499                 if (sin->sin_addr.s_addr == INADDR_ANY)
 500                         zero_address = 1;
 501                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 502                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 503                 break;
 504         case SCTP_IPV6_ADDRESS:
 505                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 506                         /* invalid param size */
 507                         return NULL;
 508                 }
 509 #ifdef INET6
 510                 sin6 = (struct sockaddr_in6 *)&sa_store;
 511                 bzero(sin6, sizeof(*sin6));
 512                 sin6->sin6_family = AF_INET6;
 513                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 514                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 515                     sizeof(struct in6_addr));
 516                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 517                         zero_address = 1;
 518                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 519                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 520 #else
 521                 /* IPv6 not enabled!  No "action" needed; just ack it */
 522                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 523                     "process_asconf_set_primary: v6 disabled- ignoring: ");
 524                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 525                 /* just respond with a "success" ASCONF-ACK */
 526                 return NULL;
 527 #endif
 528                 break;
 529         default:
 530                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 531                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 532                     aparam_length);
 533                 return m_reply;
 534         }
 535
 536         /* if 0.0.0.0/::0, use the source address instead */
 537         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 538                 sa = (struct sockaddr *)&sa_source;
 539                 sctp_asconf_get_source_ip(m, sa);
 540                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 541                     "process_asconf_set_primary: using source addr ");
 542                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 543         }
 544         /* set the primary address */
 545         if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
 546                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 547                     "process_asconf_set_primary: primary address set\n");
 548                 /* notify upper layer */
 549                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 550
 551                 if (response_required) {
 552                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 553                 }
 554                 /*
 555                  * Mobility adaptation. Ideally, when the reception of SET
 556                  * PRIMARY with DELETE IP ADDRESS of the previous primary
 557                  * destination, unacknowledged DATA are retransmitted
 558                  * immediately to the new primary destination for seamless
 559                  * handover. If the destination is UNCONFIRMED and marked to
 560                  * REQ_PRIM, The retransmission occur when reception of the
 561                  * HEARTBEAT-ACK.  (See sctp_handle_heartbeat_ack in
 562                  * sctp_input.c) Also, when change of the primary
 563                  * destination, it is better that all subsequent new DATA
 564                  * containing already queued DATA are transmitted to the new
 565                  * primary destination. (by micchie)
 566                  */
 567                 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
 568                     SCTP_MOBILITY_BASE) ||
 569                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 570                     SCTP_MOBILITY_FASTHANDOFF)) &&
 571                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 572                     SCTP_MOBILITY_PRIM_DELETED) &&
 573                     (stcb->asoc.primary_destination->dest_state &
 574                     SCTP_ADDR_UNCONFIRMED) == 0) {
 575
 576                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7);
 577                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 578                             SCTP_MOBILITY_FASTHANDOFF)) {
 579                                 sctp_assoc_immediate_retrans(stcb,
 580                                     stcb->asoc.primary_destination);
 581                         }
 582                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 583                             SCTP_MOBILITY_BASE)) {
 584                                 sctp_move_chunks_from_net(stcb,
 585                                     stcb->asoc.deleted_primary);
 586                         }
 587                         sctp_delete_prim_timer(stcb->sctp_ep, stcb,
 588                             stcb->asoc.deleted_primary);
 589                 }
 590         } else {
 591                 /* couldn't set the requested primary address! */
 592                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 593                     "process_asconf_set_primary: set primary failed!\n");
 594                 /* must have been an invalid address, so report */
 595                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 596                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 597                     aparam_length);
 598         }
 599
 600         return m_reply;
 601 }
 602
 603 /*
 604  * handles an ASCONF chunk.
 605  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 606  */
 607 void
 608 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 609     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 610     int first)
 611 {
 612         struct sctp_association *asoc;
 613         uint32_t serial_num;
 614         struct mbuf *n, *m_ack, *m_result, *m_tail;
 615         struct sctp_asconf_ack_chunk *ack_cp;
 616         struct sctp_asconf_paramhdr *aph, *ack_aph;
 617         struct sctp_ipv6addr_param *p_addr;
 618         unsigned int asconf_limit;
 619         int error = 0;          /* did an error occur? */
 620
 621         /* asconf param buffer */
 622         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 623         struct sctp_asconf_ack *ack, *ack_next;
 624
 625         /* verify minimum length */
 626         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 627                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 628                     "handle_asconf: chunk too small = %xh\n",
 629                     ntohs(cp->ch.chunk_length));
 630                 return;
 631         }
 632         asoc = &stcb->asoc;
 633         serial_num = ntohl(cp->serial_number);
 634
 635         if (compare_with_wrap(asoc->asconf_seq_in, serial_num, MAX_SEQ) ||
 636             serial_num == asoc->asconf_seq_in) {
 637                 /* got a duplicate ASCONF */
 638                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 639                     "handle_asconf: got duplicate serial number = %xh\n",
 640                     serial_num);
 641                 return;
 642         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 643                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 644                     serial_num, asoc->asconf_seq_in + 1);
 645                 return;
 646         }
 647         /* it's the expected "next" sequence number, so process it */
 648         asoc->asconf_seq_in = serial_num;       /* update sequence */
 649         /* get length of all the param's in the ASCONF */
 650         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 651         SCTPDBG(SCTP_DEBUG_ASCONF1,
 652             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 653             asconf_limit, serial_num);
 654
 655         if (first) {
 656                 /* delete old cache */
 657                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing firstASCONF. Try to delte old cache\n");
 658
 659                 ack = TAILQ_FIRST(&stcb->asoc.asconf_ack_sent);
 660                 while (ack != NULL) {
 661                         ack_next = TAILQ_NEXT(ack, next);
 662                         if (ack->serial_number == serial_num)
 663                                 break;
 664                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 665                             ack->serial_number, serial_num);
 666                         TAILQ_REMOVE(&stcb->asoc.asconf_ack_sent, ack, next);
 667                         if (ack->data != NULL) {
 668                                 sctp_m_freem(ack->data);
 669                         }
 670                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 671                         ack = ack_next;
 672                 }
 673         }
 674         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 675             M_DONTWAIT, 1, MT_DATA);
 676         if (m_ack == NULL) {
 677                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 678                     "handle_asconf: couldn't get mbuf!\n");
 679                 return;
 680         }
 681         m_tail = m_ack;         /* current reply chain's tail */
 682
 683         /* fill in ASCONF-ACK header */
 684         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 685         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 686         ack_cp->ch.chunk_flags = 0;
 687         ack_cp->serial_number = htonl(serial_num);
 688         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 689         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 690         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 691
 692         /* skip the lookup address parameter */
 693         offset += sizeof(struct sctp_asconf_chunk);
 694         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf);
 695         if (p_addr == NULL) {
 696                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 697                     "handle_asconf: couldn't get lookup addr!\n");
 698                 /* respond with a missing/invalid mandatory parameter error */
 699                 return;
 700         }
 701         /* param_length is already validated in process_control... */
 702         offset += ntohs(p_addr->ph.param_length);       /* skip lookup addr */
 703
 704         /* get pointer to first asconf param in ASCONF-ACK */
 705         ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk));
 706         if (ack_aph == NULL) {
 707                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n");
 708                 return;
 709         }
 710         /* get pointer to first asconf param in ASCONF */
 711         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf);
 712         if (aph == NULL) {
 713                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 714                 goto send_reply;
 715         }
 716         /* process through all parameters */
 717         while (aph != NULL) {
 718                 unsigned int param_length, param_type;
 719
 720                 param_type = ntohs(aph->ph.param_type);
 721                 param_length = ntohs(aph->ph.param_length);
 722                 if (offset + param_length > asconf_limit) {
 723                         /* parameter goes beyond end of chunk! */
 724                         sctp_m_freem(m_ack);
 725                         return;
 726                 }
 727                 m_result = NULL;
 728
 729                 if (param_length > sizeof(aparam_buf)) {
 730                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 731                         sctp_m_freem(m_ack);
 732                         return;
 733                 }
 734                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 735                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 736                         sctp_m_freem(m_ack);
 737                 }
 738                 /* get the entire parameter */
 739                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 740                 if (aph == NULL) {
 741                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 742                         sctp_m_freem(m_ack);
 743                         return;
 744                 }
 745                 switch (param_type) {
 746                 case SCTP_ADD_IP_ADDRESS:
 747                         asoc->peer_supports_asconf = 1;
 748                         m_result = sctp_process_asconf_add_ip(m, aph, stcb,
 749                             error);
 750                         break;
 751                 case SCTP_DEL_IP_ADDRESS:
 752                         asoc->peer_supports_asconf = 1;
 753                         m_result = sctp_process_asconf_delete_ip(m, aph, stcb,
 754                             error);
 755                         break;
 756                 case SCTP_ERROR_CAUSE_IND:
 757                         /* not valid in an ASCONF chunk */
 758                         break;
 759                 case SCTP_SET_PRIM_ADDR:
 760                         asoc->peer_supports_asconf = 1;
 761                         m_result = sctp_process_asconf_set_primary(m, aph,
 762                             stcb, error);
 763                         break;
 764                 case SCTP_NAT_VTAGS:
 765                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 766                         break;
 767                 case SCTP_SUCCESS_REPORT:
 768                         /* not valid in an ASCONF chunk */
 769                         break;
 770                 case SCTP_ULP_ADAPTATION:
 771                         /* FIX */
 772                         break;
 773                 default:
 774                         if ((param_type & 0x8000) == 0) {
 775                                 /* Been told to STOP at this param */
 776                                 asconf_limit = offset;
 777                                 /*
 778                                  * FIX FIX - We need to call
 779                                  * sctp_arethere_unrecognized_parameters()
 780                                  * to get a operr and send it for any
 781                                  * param's with the 0x4000 bit set OR do it
 782                                  * here ourselves... note we still must STOP
 783                                  * if the 0x8000 bit is clear.
 784                                  */
 785                         }
 786                         /* unknown/invalid param type */
 787                         break;
 788                 }               /* switch */
 789
 790                 /* add any (error) result to the reply mbuf chain */
 791                 if (m_result != NULL) {
 792                         SCTP_BUF_NEXT(m_tail) = m_result;
 793                         m_tail = m_result;
 794                         /* update lengths, make sure it's aligned too */
 795                         SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result));
 796                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 797                         /* set flag to force success reports */
 798                         error = 1;
 799                 }
 800                 offset += SCTP_SIZE32(param_length);
 801                 /* update remaining ASCONF message length to process */
 802                 if (offset >= asconf_limit) {
 803                         /* no more data in the mbuf chain */
 804                         break;
 805                 }
 806                 /* get pointer to next asconf param */
 807                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 808                     sizeof(struct sctp_asconf_paramhdr),
 809                     (uint8_t *) & aparam_buf);
 810                 if (aph == NULL) {
 811                         /* can't get an asconf paramhdr */
 812                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 813                         /* FIX ME - add error here... */
 814                 }
 815         }
 816
 817 send_reply:
 818         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 819         /* save the ASCONF-ACK reply */
 820         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 821             struct sctp_asconf_ack);
 822         if (ack == NULL) {
 823                 sctp_m_freem(m_ack);
 824                 return;
 825         }
 826         ack->serial_number = serial_num;
 827         ack->last_sent_to = NULL;
 828         ack->data = m_ack;
 829         ack->len = 0;
 830         n = m_ack;
 831         while (n) {
 832                 ack->len += SCTP_BUF_LEN(n);
 833                 n = SCTP_BUF_NEXT(n);
 834         }
 835         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 836
 837         /* see if last_control_chunk_from is set properly (use IP src addr) */
 838         if (stcb->asoc.last_control_chunk_from == NULL) {
 839                 /*
 840                  * this could happen if the source address was just newly
 841                  * added
 842                  */
 843                 struct ip *iph;
 844                 struct sctphdr *sh;
 845                 struct sockaddr_storage from_store;
 846                 struct sockaddr *from = (struct sockaddr *)&from_store;
 847
 848                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 849                 /* pullup already done, IP options already stripped */
 850                 iph = mtod(m, struct ip *);
 851                 sh = (struct sctphdr *)((caddr_t)iph + sizeof(*iph));
 852                 switch (iph->ip_v) {
 853                 case IPVERSION:
 854                         {
 855                                 struct sockaddr_in *from4;
 856
 857                                 from4 = (struct sockaddr_in *)&from_store;
 858                                 bzero(from4, sizeof(*from4));
 859                                 from4->sin_family = AF_INET;
 860                                 from4->sin_len = sizeof(struct sockaddr_in);
 861                                 from4->sin_addr.s_addr = iph->ip_src.s_addr;
 862                                 from4->sin_port = sh->src_port;
 863                                 break;
 864                         }
 865 #ifdef INET6
 866                 case IPV6_VERSION >> 4:
 867                         {
 868                                 struct ip6_hdr *ip6;
 869                                 struct sockaddr_in6 *from6;
 870
 871                                 ip6 = mtod(m, struct ip6_hdr *);
 872                                 from6 = (struct sockaddr_in6 *)&from_store;
 873                                 bzero(from6, sizeof(*from6));
 874                                 from6->sin6_family = AF_INET6;
 875                                 from6->sin6_len = sizeof(struct sockaddr_in6);
 876                                 from6->sin6_addr = ip6->ip6_src;
 877                                 from6->sin6_port = sh->src_port;
 878                                 /*
 879                                  * Get the scopes in properly to the sin6
 880                                  * addr's
 881                                  */
 882                                 /* we probably don't need these operations */
 883                                 (void)sa6_recoverscope(from6);
 884                                 sa6_embedscope(from6,
 885                                     MODULE_GLOBAL(ip6_use_defzone));
 886
 887                                 break;
 888                         }
 889 #endif
 890                 default:
 891                         /* unknown address type */
 892                         from = NULL;
 893                 }
 894                 if (from != NULL) {
 895                         SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 896                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, from);
 897                         /* look up the from address */
 898                         stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, from);
 899 #ifdef SCTP_DEBUG
 900                         if (stcb->asoc.last_control_chunk_from == NULL)
 901                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 902 #endif
 903                 }
 904         }
 905 }
 906
 907 /*
 908  * does the address match? returns 0 if not, 1 if so
 909  */
 910 static uint32_t
 911 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 912 {
 913 #ifdef INET6
 914         if (sa->sa_family == AF_INET6) {
 915                 /* IPv6 sa address */
 916                 /* XXX scopeid */
 917                 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 918
 919                 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 920                     (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 921                     sizeof(struct in6_addr)) == 0)) {
 922                         return (1);
 923                 }
 924         } else
 925 #endif                          /* INET6 */
 926         if (sa->sa_family == AF_INET) {
 927                 /* IPv4 sa address */
 928                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 929
 930                 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 931                     (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 932                     sizeof(struct in_addr)) == 0)) {
 933                         return (1);
 934                 }
 935         }
 936         return (0);
 937 }
 938
 939 /*
 940  * does the address match? returns 0 if not, 1 if so
 941  */
 942 static uint32_t
 943 sctp_addr_match(
 944     struct sctp_ipv6addr_param *v6addr,
 945     struct sockaddr *sa)
 946 {
 947         uint16_t param_type, param_length;
 948         struct sctp_ipv4addr_param *v4addr = (struct sctp_ipv4addr_param *)v6addr;
 949
 950 #ifdef INET6
 951         if (sa->sa_family == AF_INET6) {
 952                 /* IPv6 sa address */
 953                 /* XXX scopeid */
 954                 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 955
 956                 param_type = ntohs(v6addr->ph.param_type);
 957                 param_length = ntohs(v6addr->ph.param_length);
 958
 959                 if ((param_type == SCTP_IPV6_ADDRESS) &&
 960                     param_length == sizeof(struct sctp_ipv6addr_param) &&
 961                     (memcmp(&v6addr->addr, &sin6->sin6_addr,
 962                     sizeof(struct in6_addr)) == 0)) {
 963                         return (1);
 964                 }
 965         }
 966 #endif
 967         if (sa->sa_family == AF_INET) {
 968                 /* IPv4 sa address */
 969                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 970
 971                 param_type = ntohs(v4addr->ph.param_type);
 972                 param_length = ntohs(v4addr->ph.param_length);
 973
 974                 if ((param_type == SCTP_IPV4_ADDRESS) &&
 975                     param_length == sizeof(struct sctp_ipv4addr_param) &&
 976                     (memcmp(&v4addr->addr, &sin->sin_addr,
 977                     sizeof(struct in_addr)) == 0)) {
 978                         return (1);
 979                 }
 980         }
 981         return (0);
 982 }
 983
 984 /*
 985  * Cleanup for non-responded/OP ERR'd ASCONF
 986  */
 987 void
 988 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
 989 {
 990         /* mark peer as ASCONF incapable */
 991         stcb->asoc.peer_supports_asconf = 0;
 992         /*
 993          * clear out any existing asconfs going out
 994          */
 995         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
 996             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
 997         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
 998         /* remove the old ASCONF on our outbound queue */
 999         sctp_toss_old_asconf(stcb);
1000 }
1001
1002 /*
1003  * cleanup any cached source addresses that may be topologically
1004  * incorrect after a new address has been added to this interface.
1005  */
1006 static void
1007 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
1008 {
1009         struct sctp_nets *net;
1010
1011         /*
1012          * Ideally, we want to only clear cached routes and source addresses
1013          * that are topologically incorrect.  But since there is no easy way
1014          * to know whether the newly added address on the ifn would cause a
1015          * routing change (i.e. a new egress interface would be chosen)
1016          * without doing a new routing lookup and source address selection,
1017          * we will (for now) just flush any cached route using a different
1018          * ifn (and cached source addrs) and let output re-choose them
1019          * during the next send on that net.
1020          */
1021         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1022                 /*
1023                  * clear any cached route (and cached source address) if the
1024                  * route's interface is NOT the same as the address change.
1025                  * If it's the same interface, just clear the cached source
1026                  * address.
1027                  */
1028                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
1029                     ((ifn == NULL) ||
1030                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
1031                         /* clear any cached route */
1032                         RTFREE(net->ro.ro_rt);
1033                         net->ro.ro_rt = NULL;
1034                 }
1035                 /* clear any cached source address */
1036                 if (net->src_addr_selected) {
1037                         sctp_free_ifa(net->ro._s_addr);
1038                         net->ro._s_addr = NULL;
1039                         net->src_addr_selected = 0;
1040                 }
1041         }
1042 }
1043
1044
1045 void
1046 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
1047 {
1048         int error;
1049
1050         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
1051                 return;
1052         }
1053         if (stcb->asoc.deleted_primary == NULL) {
1054                 return;
1055         }
1056         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
1057                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
1058                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1059                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
1060                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
1061                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
1062                     stcb->asoc.deleted_primary,
1063                     SCTP_FROM_SCTP_TIMER + SCTP_LOC_8);
1064                 stcb->asoc.num_send_timers_up--;
1065                 if (stcb->asoc.num_send_timers_up < 0) {
1066                         stcb->asoc.num_send_timers_up = 0;
1067                 }
1068                 SCTP_TCB_LOCK_ASSERT(stcb);
1069                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1070                     stcb->asoc.deleted_primary);
1071                 if (error) {
1072                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1073                         return;
1074                 }
1075                 SCTP_TCB_LOCK_ASSERT(stcb);
1076 #ifdef SCTP_AUDITING_ENABLED
1077                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1078 #endif
1079                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1080                 if ((stcb->asoc.num_send_timers_up == 0) &&
1081                     (stcb->asoc.sent_queue_cnt > 0)) {
1082                         struct sctp_tmit_chunk *chk;
1083
1084                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1085                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1086                             stcb, chk->whoTo);
1087                 }
1088         }
1089         return;
1090 }
1091
1092 static int
1093     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1094
1095 void
1096 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1097 {
1098         struct sctp_tmit_chunk *chk;
1099
1100         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1101         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1102             SCTP_FROM_SCTP_TIMER + SCTP_LOC_5);
1103         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1104         net->error_count = 0;
1105         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1106                 if (chk->whoTo == net) {
1107                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1108                                 chk->sent = SCTP_DATAGRAM_RESEND;
1109                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1110                                 sctp_flight_size_decrease(chk);
1111                                 sctp_total_flight_decrease(stcb, chk);
1112                                 net->marked_retrans++;
1113                                 stcb->asoc.marked_retrans++;
1114                         }
1115                 }
1116         }
1117         if (net->marked_retrans) {
1118                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1119         }
1120 }
1121
1122 static void
1123 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1124 {
1125         struct sctp_nets *net;
1126         int addrnum, changed;
1127
1128         /*
1129          * If number of local valid addresses is 1, the valid address is
1130          * probably newly added address. Several valid addresses in this
1131          * association.  A source address may not be changed.  Additionally,
1132          * they can be configured on a same interface as "alias" addresses.
1133          * (by micchie)
1134          */
1135         addrnum = sctp_local_addr_count(stcb);
1136         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1137             addrnum);
1138         if (addrnum == 1) {
1139                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1140                         /* clear any cached route and source address */
1141                         if (net->ro.ro_rt) {
1142                                 RTFREE(net->ro.ro_rt);
1143                                 net->ro.ro_rt = NULL;
1144                         }
1145                         if (net->src_addr_selected) {
1146                                 sctp_free_ifa(net->ro._s_addr);
1147                                 net->ro._s_addr = NULL;
1148                                 net->src_addr_selected = 0;
1149                         }
1150                         /* Retransmit unacknowledged DATA chunks immediately */
1151                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1152                             SCTP_MOBILITY_FASTHANDOFF)) {
1153                                 sctp_net_immediate_retrans(stcb, net);
1154                         }
1155                         /* also, SET PRIMARY is maybe already sent */
1156                 }
1157                 return;
1158         }
1159         /* Multiple local addresses exsist in the association.  */
1160         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1161                 /* clear any cached route and source address */
1162                 if (net->ro.ro_rt) {
1163                         RTFREE(net->ro.ro_rt);
1164                         net->ro.ro_rt = NULL;
1165                 }
1166                 if (net->src_addr_selected) {
1167                         sctp_free_ifa(net->ro._s_addr);
1168                         net->ro._s_addr = NULL;
1169                         net->src_addr_selected = 0;
1170                 }
1171                 /*
1172                  * Check if the nexthop is corresponding to the new address.
1173                  * If the new address is corresponding to the current
1174                  * nexthop, the path will be changed. If the new address is
1175                  * NOT corresponding to the current nexthop, the path will
1176                  * not be changed.
1177                  */
1178                 SCTP_RTALLOC((sctp_route_t *) & net->ro,
1179                     stcb->sctp_ep->def_vrf_id);
1180                 if (net->ro.ro_rt == NULL)
1181                         continue;
1182
1183                 changed = 0;
1184                 if (net->ro._l_addr.sa.sa_family == AF_INET) {
1185                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro))
1186                                 changed = 1;
1187                 }
1188 #ifdef INET6
1189                 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1190                         if (sctp_v6src_match_nexthop(
1191                             &newifa->address.sin6, (sctp_route_t *) & net->ro))
1192                                 changed = 1;
1193                 }
1194 #endif
1195                 /*
1196                  * if the newly added address does not relate routing
1197                  * information, we skip.
1198                  */
1199                 if (changed == 0)
1200                         continue;
1201                 /* Retransmit unacknowledged DATA chunks immediately */
1202                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1203                     SCTP_MOBILITY_FASTHANDOFF)) {
1204                         sctp_net_immediate_retrans(stcb, net);
1205                 }
1206                 /* Send SET PRIMARY for this new address */
1207                 if (net == stcb->asoc.primary_destination) {
1208                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1209                             SCTP_SET_PRIM_ADDR);
1210                 }
1211         }
1212 }
1213
1214 /*
1215  * process an ADD/DELETE IP ack from peer.
1216  * addr: corresponding sctp_ifa to the address being added/deleted.
1217  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1218  * flag: 1=success, 0=failure.
1219  */
1220 static void
1221 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr,
1222     uint16_t type, uint32_t flag)
1223 {
1224         /*
1225          * do the necessary asoc list work- if we get a failure indication,
1226          * leave the address on the assoc's restricted list.  If we get a
1227          * success indication, remove the address from the restricted list.
1228          */
1229         /*
1230          * Note: this will only occur for ADD_IP_ADDRESS, since
1231          * DEL_IP_ADDRESS is never actually added to the list...
1232          */
1233         if (flag) {
1234                 /* success case, so remove from the restricted list */
1235                 sctp_del_local_addr_restricted(stcb, addr);
1236
1237                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1238                     SCTP_MOBILITY_BASE) ||
1239                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1240                     SCTP_MOBILITY_FASTHANDOFF)) {
1241                         sctp_path_check_and_react(stcb, addr);
1242                         return;
1243                 }
1244                 /* clear any cached/topologically incorrect source addresses */
1245                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1246         }
1247         /* else, leave it on the list */
1248 }
1249
1250 /*
1251  * add an asconf add/delete/set primary IP address parameter to the queue.
1252  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1253  * returns 0 if queued, -1 if not queued/removed.
1254  * NOTE: if adding, but a delete for the same address is already scheduled
1255  * (and not yet sent out), simply remove it from queue.  Same for deleting
1256  * an address already scheduled for add.  If a duplicate operation is found,
1257  * ignore the new one.
1258  */
1259 static int
1260 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1261     uint16_t type)
1262 {
1263         struct sctp_asconf_addr *aa, *aa_next;
1264         struct sockaddr *sa;
1265
1266         /* make sure the request isn't already in the queue */
1267         for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1268             aa = aa_next) {
1269                 aa_next = TAILQ_NEXT(aa, next);
1270                 /* address match? */
1271                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1272                         continue;
1273                 /*
1274                  * is the request already in queue but not sent? pass the
1275                  * request already sent in order to resolve the following
1276                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1277                  * can't remove the ADD request already sent 3. arrival of
1278                  * ADD
1279                  */
1280                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1281                         return (-1);
1282                 }
1283                 /* is the negative request already in queue, and not sent */
1284                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1285                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1286                         /* add requested, delete already queued */
1287                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1288                         /* remove the ifa from the restricted list */
1289                         sctp_del_local_addr_restricted(stcb, ifa);
1290                         /* free the asconf param */
1291                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1292                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1293                         return (-1);
1294                 }
1295                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1296                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1297                         /* delete requested, add already queued */
1298                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1299                         /* remove the aa->ifa from the restricted list */
1300                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1301                         /* free the asconf param */
1302                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1303                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1304                         return (-1);
1305                 }
1306         }                       /* for each aa */
1307
1308         /* adding new request to the queue */
1309         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1310             SCTP_M_ASC_ADDR);
1311         if (aa == NULL) {
1312                 /* didn't get memory */
1313                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1314                 return (-1);
1315         }
1316         aa->special_del = 0;
1317         /* fill in asconf address parameter fields */
1318         /* top level elements are "networked" during send */
1319         aa->ap.aph.ph.param_type = type;
1320         aa->ifa = ifa;
1321         atomic_add_int(&ifa->refcount, 1);
1322         /* correlation_id filled in during send routine later... */
1323         if (ifa->address.sa.sa_family == AF_INET6) {
1324                 /* IPv6 address */
1325                 struct sockaddr_in6 *sin6;
1326
1327                 sin6 = (struct sockaddr_in6 *)&ifa->address.sa;
1328                 sa = (struct sockaddr *)sin6;
1329                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1330                 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1331                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1332                     sizeof(struct sctp_ipv6addr_param);
1333                 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1334                     sizeof(struct in6_addr));
1335         } else if (ifa->address.sa.sa_family == AF_INET) {
1336                 /* IPv4 address */
1337                 struct sockaddr_in *sin;
1338
1339                 sin = (struct sockaddr_in *)&ifa->address.sa;
1340                 sa = (struct sockaddr *)sin;
1341                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1342                 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1343                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1344                     sizeof(struct sctp_ipv4addr_param);
1345                 memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1346                     sizeof(struct in_addr));
1347         } else {
1348                 /* invalid family! */
1349                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1350                 sctp_free_ifa(ifa);
1351                 return (-1);
1352         }
1353         aa->sent = 0;           /* clear sent flag */
1354
1355         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1356 #ifdef SCTP_DEBUG
1357         if (SCTP_BASE_SYSCTL(sctp_debug_on) && SCTP_DEBUG_ASCONF2) {
1358                 if (type == SCTP_ADD_IP_ADDRESS) {
1359                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1360                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1361                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1362                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1363                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1364                 } else {
1365                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1366                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1367                 }
1368         }
1369 #endif
1370
1371         return (0);
1372 }
1373
1374
1375 /*
1376  * add an asconf operation for the given ifa and type.
1377  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1378  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1379  * advisable.
1380  */
1381 static int
1382 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1383     uint16_t type)
1384 {
1385         uint32_t status;
1386         int pending_delete_queued = 0;
1387
1388         /* see if peer supports ASCONF */
1389         if (stcb->asoc.peer_supports_asconf == 0) {
1390                 return (-1);
1391         }
1392         /*
1393          * if this is deleting the last address from the assoc, mark it as
1394          * pending.
1395          */
1396         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending &&
1397             (sctp_local_addr_count(stcb) < 2)) {
1398                 /* set the pending delete info only */
1399                 stcb->asoc.asconf_del_pending = 1;
1400                 stcb->asoc.asconf_addr_del_pending = ifa;
1401                 atomic_add_int(&ifa->refcount, 1);
1402                 SCTPDBG(SCTP_DEBUG_ASCONF2,
1403                     "asconf_queue_add: mark delete last address pending\n");
1404                 return (-1);
1405         }
1406         /* queue an asconf parameter */
1407         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1408
1409         /*
1410          * if this is an add, and there is a delete also pending (i.e. the
1411          * last local address is being changed), queue the pending delete
1412          * too.
1413          */
1414         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1415                 /* queue in the pending delete */
1416                 if (sctp_asconf_queue_mgmt(stcb,
1417                     stcb->asoc.asconf_addr_del_pending,
1418                     SCTP_DEL_IP_ADDRESS) == 0) {
1419                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n");
1420                         pending_delete_queued = 1;
1421                         /* clear out the pending delete info */
1422                         stcb->asoc.asconf_del_pending = 0;
1423                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1424                         stcb->asoc.asconf_addr_del_pending = NULL;
1425                 }
1426         }
1427         if (pending_delete_queued) {
1428                 struct sctp_nets *net;
1429
1430                 /*
1431                  * since we know that the only/last address is now being
1432                  * changed in this case, reset the cwnd/rto on all nets to
1433                  * start as a new address and path.  Also clear the error
1434                  * counts to give the assoc the best chance to complete the
1435                  * address change.
1436                  */
1437                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1438                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1439                             net);
1440                         net->RTO = 0;
1441                         net->error_count = 0;
1442                 }
1443                 stcb->asoc.overall_error_count = 0;
1444                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1445                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1446                             stcb->asoc.overall_error_count,
1447                             0,
1448                             SCTP_FROM_SCTP_ASCONF,
1449                             __LINE__);
1450                 }
1451                 /* queue in an advisory set primary too */
1452                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1453                 /* let caller know we should send this out immediately */
1454                 status = 1;
1455         }
1456         return (status);
1457 }
1458
1459 /*-
1460  * add an asconf delete IP address parameter to the queue by sockaddr and
1461  * possibly with no sctp_ifa available.  This is only called by the routine
1462  * that checks the addresses in an INIT-ACK against the current address list.
1463  * returns 0 if completed, non-zero if not completed.
1464  * NOTE: if an add is already scheduled (and not yet sent out), simply
1465  * remove it from queue.  If a duplicate operation is found, ignore the
1466  * new one.
1467  */
1468 static int
1469 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1470 {
1471         struct sctp_ifa *ifa;
1472         struct sctp_asconf_addr *aa, *aa_next;
1473         uint32_t vrf_id;
1474
1475         if (stcb == NULL) {
1476                 return (-1);
1477         }
1478         /* see if peer supports ASCONF */
1479         if (stcb->asoc.peer_supports_asconf == 0) {
1480                 return (-1);
1481         }
1482         /* make sure the request isn't already in the queue */
1483         for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1484             aa = aa_next) {
1485                 aa_next = TAILQ_NEXT(aa, next);
1486                 /* address match? */
1487                 if (sctp_asconf_addr_match(aa, sa) == 0)
1488                         continue;
1489                 /* is the request already in queue (sent or not) */
1490                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1491                         return (-1);
1492                 }
1493                 /* is the negative request already in queue, and not sent */
1494                 if (aa->sent == 1)
1495                         continue;
1496                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1497                         /* add already queued, so remove existing entry */
1498                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1499                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1500                         /* free the entry */
1501                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1502                         return (-1);
1503                 }
1504         }                       /* for each aa */
1505
1506         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1507         if (stcb) {
1508                 vrf_id = stcb->asoc.vrf_id;
1509         } else {
1510                 vrf_id = SCTP_DEFAULT_VRFID;
1511         }
1512         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
1513
1514         /* adding new request to the queue */
1515         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1516             SCTP_M_ASC_ADDR);
1517         if (aa == NULL) {
1518                 /* didn't get memory */
1519                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1520                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1521                 return (-1);
1522         }
1523         aa->special_del = 0;
1524         /* fill in asconf address parameter fields */
1525         /* top level elements are "networked" during send */
1526         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1527         aa->ifa = ifa;
1528         if (ifa)
1529                 atomic_add_int(&ifa->refcount, 1);
1530         /* correlation_id filled in during send routine later... */
1531         if (sa->sa_family == AF_INET6) {
1532                 /* IPv6 address */
1533                 struct sockaddr_in6 *sin6;
1534
1535                 sin6 = (struct sockaddr_in6 *)sa;
1536                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1537                 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1538                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1539                 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1540                     sizeof(struct in6_addr));
1541         } else if (sa->sa_family == AF_INET) {
1542                 /* IPv4 address */
1543                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1544
1545                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1546                 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1547                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1548                 memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1549                     sizeof(struct in_addr));
1550         } else {
1551                 /* invalid family! */
1552                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1553                 if (ifa)
1554                         sctp_free_ifa(ifa);
1555                 return (-1);
1556         }
1557         aa->sent = 0;           /* clear sent flag */
1558
1559         /* delete goes to the back of the queue */
1560         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1561
1562         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1563         return (0);
1564 }
1565
1566 /*
1567  * find a specific asconf param on our "sent" queue
1568  */
1569 static struct sctp_asconf_addr *
1570 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1571 {
1572         struct sctp_asconf_addr *aa;
1573
1574         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1575                 if (aa->ap.aph.correlation_id == correlation_id &&
1576                     aa->sent == 1) {
1577                         /* found it */
1578                         return (aa);
1579                 }
1580         }
1581         /* didn't find it */
1582         return (NULL);
1583 }
1584
1585 /*
1586  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1587  * notifications based on the error response
1588  */
1589 static void
1590 sctp_asconf_process_error(struct sctp_tcb *stcb,
1591     struct sctp_asconf_paramhdr *aph)
1592 {
1593         struct sctp_error_cause *eh;
1594         struct sctp_paramhdr *ph;
1595         uint16_t param_type;
1596         uint16_t error_code;
1597
1598         eh = (struct sctp_error_cause *)(aph + 1);
1599         ph = (struct sctp_paramhdr *)(eh + 1);
1600         /* validate lengths */
1601         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1602             htons(aph->ph.param_length)) {
1603                 /* invalid error cause length */
1604                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1605                     "asconf_process_error: cause element too long\n");
1606                 return;
1607         }
1608         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1609             htons(eh->length)) {
1610                 /* invalid included TLV length */
1611                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1612                     "asconf_process_error: included TLV too long\n");
1613                 return;
1614         }
1615         /* which error code ? */
1616         error_code = ntohs(eh->code);
1617         param_type = ntohs(aph->ph.param_type);
1618         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1619         switch (error_code) {
1620         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1621                 /* we allow ourselves to "try again" for this error */
1622                 break;
1623         default:
1624                 /* peer can't handle it... */
1625                 switch (param_type) {
1626                 case SCTP_ADD_IP_ADDRESS:
1627                 case SCTP_DEL_IP_ADDRESS:
1628                         stcb->asoc.peer_supports_asconf = 0;
1629                         break;
1630                 case SCTP_SET_PRIM_ADDR:
1631                         stcb->asoc.peer_supports_asconf = 0;
1632                         break;
1633                 default:
1634                         break;
1635                 }
1636         }
1637 }
1638
1639 /*
1640  * process an asconf queue param.
1641  * aparam: parameter to process, will be removed from the queue.
1642  * flag: 1=success case, 0=failure case
1643  */
1644 static void
1645 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1646     struct sctp_asconf_addr *aparam, uint32_t flag)
1647 {
1648         uint16_t param_type;
1649
1650         /* process this param */
1651         param_type = aparam->ap.aph.ph.param_type;
1652         switch (param_type) {
1653         case SCTP_ADD_IP_ADDRESS:
1654                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1655                     "process_param_ack: added IP address\n");
1656                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag);
1657                 break;
1658         case SCTP_DEL_IP_ADDRESS:
1659                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1660                     "process_param_ack: deleted IP address\n");
1661                 /* nothing really to do... lists already updated */
1662                 break;
1663         case SCTP_SET_PRIM_ADDR:
1664                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1665                     "process_param_ack: set primary IP address\n");
1666                 /* nothing to do... peer may start using this addr */
1667                 if (flag == 0)
1668                         stcb->asoc.peer_supports_asconf = 0;
1669                 break;
1670         default:
1671                 /* should NEVER happen */
1672                 break;
1673         }
1674
1675         /* remove the param and free it */
1676         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1677         if (aparam->ifa)
1678                 sctp_free_ifa(aparam->ifa);
1679         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1680 }
1681
1682 /*
1683  * cleanup from a bad asconf ack parameter
1684  */
1685 static void
1686 sctp_asconf_ack_clear(struct sctp_tcb *stcb)
1687 {
1688         /* assume peer doesn't really know how to do asconfs */
1689         stcb->asoc.peer_supports_asconf = 0;
1690         /* XXX we could free the pending queue here */
1691 }
1692
1693 void
1694 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1695     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1696     struct sctp_nets *net, int *abort_no_unlock)
1697 {
1698         struct sctp_association *asoc;
1699         uint32_t serial_num;
1700         uint16_t ack_length;
1701         struct sctp_asconf_paramhdr *aph;
1702         struct sctp_asconf_addr *aa, *aa_next;
1703         uint32_t last_error_id = 0;     /* last error correlation id */
1704         uint32_t id;
1705         struct sctp_asconf_addr *ap;
1706
1707         /* asconf param buffer */
1708         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1709
1710         /* verify minimum length */
1711         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1712                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1713                     "handle_asconf_ack: chunk too small = %xh\n",
1714                     ntohs(cp->ch.chunk_length));
1715                 return;
1716         }
1717         asoc = &stcb->asoc;
1718         serial_num = ntohl(cp->serial_number);
1719
1720         /*
1721          * NOTE: we may want to handle this differently- currently, we will
1722          * abort when we get an ack for the expected serial number + 1 (eg.
1723          * we didn't send it), process an ack normally if it is the expected
1724          * serial number, and re-send the previous ack for *ALL* other
1725          * serial numbers
1726          */
1727
1728         /*
1729          * if the serial number is the next expected, but I didn't send it,
1730          * abort the asoc, since someone probably just hijacked us...
1731          */
1732         if (serial_num == (asoc->asconf_seq_out + 1)) {
1733                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1734                 sctp_abort_an_association(stcb->sctp_ep, stcb,
1735                     SCTP_CAUSE_ILLEGAL_ASCONF_ACK, NULL, SCTP_SO_NOT_LOCKED);
1736                 *abort_no_unlock = 1;
1737                 return;
1738         }
1739         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1740                 /* got a duplicate/unexpected ASCONF-ACK */
1741                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1742                     serial_num, asoc->asconf_seq_out_acked + 1);
1743                 return;
1744         }
1745         if (serial_num == asoc->asconf_seq_out - 1) {
1746                 /* stop our timer */
1747                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1748                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
1749         }
1750         /* process the ASCONF-ACK contents */
1751         ack_length = ntohs(cp->ch.chunk_length) -
1752             sizeof(struct sctp_asconf_ack_chunk);
1753         offset += sizeof(struct sctp_asconf_ack_chunk);
1754         /* process through all parameters */
1755         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1756                 unsigned int param_length, param_type;
1757
1758                 /* get pointer to next asconf parameter */
1759                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1760                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1761                 if (aph == NULL) {
1762                         /* can't get an asconf paramhdr */
1763                         sctp_asconf_ack_clear(stcb);
1764                         return;
1765                 }
1766                 param_type = ntohs(aph->ph.param_type);
1767                 param_length = ntohs(aph->ph.param_length);
1768                 if (param_length > ack_length) {
1769                         sctp_asconf_ack_clear(stcb);
1770                         return;
1771                 }
1772                 if (param_length < sizeof(struct sctp_paramhdr)) {
1773                         sctp_asconf_ack_clear(stcb);
1774                         return;
1775                 }
1776                 /* get the complete parameter... */
1777                 if (param_length > sizeof(aparam_buf)) {
1778                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1779                             "param length (%u) larger than buffer size!\n", param_length);
1780                         sctp_asconf_ack_clear(stcb);
1781                         return;
1782                 }
1783                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1784                 if (aph == NULL) {
1785                         sctp_asconf_ack_clear(stcb);
1786                         return;
1787                 }
1788                 /* correlation_id is transparent to peer, no ntohl needed */
1789                 id = aph->correlation_id;
1790
1791                 switch (param_type) {
1792                 case SCTP_ERROR_CAUSE_IND:
1793                         last_error_id = id;
1794                         /* find the corresponding asconf param in our queue */
1795                         ap = sctp_asconf_find_param(stcb, id);
1796                         if (ap == NULL) {
1797                                 /* hmm... can't find this in our queue! */
1798                                 break;
1799                         }
1800                         /* process the parameter, failed flag */
1801                         sctp_asconf_process_param_ack(stcb, ap, 0);
1802                         /* process the error response */
1803                         sctp_asconf_process_error(stcb, aph);
1804                         break;
1805                 case SCTP_SUCCESS_REPORT:
1806                         /* find the corresponding asconf param in our queue */
1807                         ap = sctp_asconf_find_param(stcb, id);
1808                         if (ap == NULL) {
1809                                 /* hmm... can't find this in our queue! */
1810                                 break;
1811                         }
1812                         /* process the parameter, success flag */
1813                         sctp_asconf_process_param_ack(stcb, ap, 1);
1814                         break;
1815                 default:
1816                         break;
1817                 }               /* switch */
1818
1819                 /* update remaining ASCONF-ACK message length to process */
1820                 ack_length -= SCTP_SIZE32(param_length);
1821                 if (ack_length <= 0) {
1822                         /* no more data in the mbuf chain */
1823                         break;
1824                 }
1825                 offset += SCTP_SIZE32(param_length);
1826         }                       /* while */
1827
1828         /*
1829          * if there are any "sent" params still on the queue, these are
1830          * implicitly "success", or "failed" (if we got an error back) ...
1831          * so process these appropriately
1832          *
1833          * we assume that the correlation_id's are monotonically increasing
1834          * beginning from 1 and that we don't have *that* many outstanding
1835          * at any given time
1836          */
1837         if (last_error_id == 0)
1838                 last_error_id--;/* set to "max" value */
1839         for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1840             aa = aa_next) {
1841                 aa_next = TAILQ_NEXT(aa, next);
1842                 if (aa->sent == 1) {
1843                         /*
1844                          * implicitly successful or failed if correlation_id
1845                          * < last_error_id, then success else, failure
1846                          */
1847                         if (aa->ap.aph.correlation_id < last_error_id)
1848                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1849                         else
1850                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1851                 } else {
1852                         /*
1853                          * since we always process in order (FIFO queue) if
1854                          * we reach one that hasn't been sent, the rest
1855                          * should not have been sent either. so, we're
1856                          * done...
1857                          */
1858                         break;
1859                 }
1860         }
1861
1862         /* update the next sequence number to use */
1863         asoc->asconf_seq_out_acked++;
1864         /* remove the old ASCONF on our outbound queue */
1865         sctp_toss_old_asconf(stcb);
1866         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1867 #ifdef SCTP_TIMER_BASED_ASCONF
1868                 /* we have more params, so restart our timer */
1869                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1870                     stcb, net);
1871 #else
1872                 /* we have more params, so send out more */
1873                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1874 #endif
1875         }
1876 }
1877
1878 #ifdef INET6
1879 static uint32_t
1880 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1881 {
1882         struct sockaddr_in6 *sin6, *net6;
1883         struct sctp_nets *net;
1884
1885         if (sa->sa_family != AF_INET6) {
1886                 /* wrong family */
1887                 return (0);
1888         }
1889         sin6 = (struct sockaddr_in6 *)sa;
1890         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1891                 /* not link local address */
1892                 return (0);
1893         }
1894         /* hunt through our destination nets list for this scope_id */
1895         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1896                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1897                     AF_INET6)
1898                         continue;
1899                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1900                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1901                         continue;
1902                 if (sctp_is_same_scope(sin6, net6)) {
1903                         /* found one */
1904                         return (1);
1905                 }
1906         }
1907         /* didn't find one */
1908         return (0);
1909 }
1910
1911 #endif
1912
1913 /*
1914  * address management functions
1915  */
1916 static void
1917 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1918     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1919 {
1920         int status;
1921
1922
1923         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 &&
1924             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1925                 /* subset bound, no ASCONF allowed case, so ignore */
1926                 return;
1927         }
1928         /*
1929          * note: we know this is not the subset bound, no ASCONF case eg.
1930          * this is boundall or subset bound w/ASCONF allowed
1931          */
1932
1933         /* first, make sure it's a good address family */
1934         if (ifa->address.sa.sa_family != AF_INET6 &&
1935             ifa->address.sa.sa_family != AF_INET) {
1936                 return;
1937         }
1938         /* make sure we're "allowed" to add this type of addr */
1939         if (ifa->address.sa.sa_family == AF_INET6) {
1940                 /* invalid if we're not a v6 endpoint */
1941                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1942                         return;
1943                 /* is the v6 addr really valid ? */
1944                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1945                         return;
1946                 }
1947         }
1948         /* put this address on the "pending/do not use yet" list */
1949         sctp_add_local_addr_restricted(stcb, ifa);
1950         /*
1951          * check address scope if address is out of scope, don't queue
1952          * anything... note: this would leave the address on both inp and
1953          * asoc lists
1954          */
1955         switch (ifa->address.sa.sa_family) {
1956 #ifdef INET6
1957         case AF_INET6:
1958                 {
1959                         struct sockaddr_in6 *sin6;
1960
1961                         sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1962                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1963                                 /* we skip unspecifed addresses */
1964                                 return;
1965                         }
1966                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1967                                 if (stcb->asoc.local_scope == 0) {
1968                                         return;
1969                                 }
1970                                 /* is it the right link local scope? */
1971                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1972                                         return;
1973                                 }
1974                         }
1975                         if (stcb->asoc.site_scope == 0 &&
1976                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1977                                 return;
1978                         }
1979                         break;
1980                 }
1981 #endif
1982         case AF_INET:
1983                 {
1984                         struct sockaddr_in *sin;
1985                         struct in6pcb *inp6;
1986
1987                         inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1988                         /* invalid if we are a v6 only endpoint */
1989                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1990                             SCTP_IPV6_V6ONLY(inp6))
1991                                 return;
1992
1993                         sin = (struct sockaddr_in *)&ifa->address.sa;
1994                         if (sin->sin_addr.s_addr == 0) {
1995                                 /* we skip unspecifed addresses */
1996                                 return;
1997                         }
1998                         if (stcb->asoc.ipv4_local_scope == 0 &&
1999                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2000                                 return;
2001                         }
2002                         break;
2003                 }
2004         default:
2005                 /* else, not AF_INET or AF_INET6, so skip */
2006                 return;
2007         }
2008
2009         /* queue an asconf for this address add/delete */
2010         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
2011                 /* does the peer do asconf? */
2012                 if (stcb->asoc.peer_supports_asconf) {
2013                         /* queue an asconf for this addr */
2014                         status = sctp_asconf_queue_add(stcb, ifa, type);
2015
2016                         /*
2017                          * if queued ok, and in the open state, send out the
2018                          * ASCONF.  If in the non-open state, these will be
2019                          * sent when the state goes open.
2020                          */
2021                         if (status == 0 &&
2022                             SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2023 #ifdef SCTP_TIMER_BASED_ASCONF
2024                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
2025                                     stcb, stcb->asoc.primary_destination);
2026 #else
2027                                 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2028                                     addr_locked);
2029 #endif
2030                         }
2031                 }
2032         }
2033 }
2034
2035
2036 int
2037 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val)
2038 {
2039         struct sctp_asconf_iterator *asc;
2040         struct sctp_ifa *ifa;
2041         struct sctp_laddr *l;
2042         int cnt_invalid = 0;
2043
2044         asc = (struct sctp_asconf_iterator *)ptr;
2045         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2046                 ifa = l->ifa;
2047                 if (ifa->address.sa.sa_family == AF_INET6) {
2048                         /* invalid if we're not a v6 endpoint */
2049                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2050                                 cnt_invalid++;
2051                                 if (asc->cnt == cnt_invalid)
2052                                         return (1);
2053                                 else
2054                                         continue;
2055                         }
2056                 } else if (ifa->address.sa.sa_family == AF_INET) {
2057                         /* invalid if we are a v6 only endpoint */
2058                         struct in6pcb *inp6;
2059
2060                         inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2061                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2062                             SCTP_IPV6_V6ONLY(inp6)) {
2063                                 cnt_invalid++;
2064                                 if (asc->cnt == cnt_invalid)
2065                                         return (1);
2066                                 else
2067                                         continue;
2068                         }
2069                 } else {
2070                         /* invalid address family */
2071                         cnt_invalid++;
2072                         if (asc->cnt == cnt_invalid)
2073                                 return (1);
2074                         else
2075                                 continue;
2076                 }
2077         }
2078         return (0);
2079 }
2080
2081 static int
2082 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val)
2083 {
2084         struct sctp_ifa *ifa;
2085         struct sctp_asconf_iterator *asc;
2086         struct sctp_laddr *laddr, *nladdr, *l;
2087
2088         /* Only for specific case not bound all */
2089         asc = (struct sctp_asconf_iterator *)ptr;
2090         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2091                 ifa = l->ifa;
2092                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2093                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2094                             sctp_nxt_addr) {
2095                                 if (laddr->ifa == ifa) {
2096                                         laddr->action = 0;
2097                                         break;
2098                                 }
2099                         }
2100                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2101                         laddr = LIST_FIRST(&inp->sctp_addr_list);
2102                         while (laddr) {
2103                                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2104                                 /* remove only after all guys are done */
2105                                 if (laddr->ifa == ifa) {
2106                                         sctp_del_local_addr_ep(inp, ifa);
2107                                 }
2108                                 laddr = nladdr;
2109                         }
2110                 }
2111         }
2112         return (0);
2113 }
2114
2115 void
2116 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2117     void *ptr, uint32_t val)
2118 {
2119         struct sctp_asconf_iterator *asc;
2120         struct sctp_ifa *ifa;
2121         struct sctp_laddr *l;
2122         int cnt_invalid = 0;
2123         int type, status;
2124         int num_queued = 0;
2125
2126         asc = (struct sctp_asconf_iterator *)ptr;
2127         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2128                 ifa = l->ifa;
2129                 type = l->action;
2130
2131                 /* address's vrf_id must be the vrf_id of the assoc */
2132                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2133                         continue;
2134                 }
2135                 /* Same checks again for assoc */
2136                 switch (ifa->address.sa.sa_family) {
2137 #ifdef INET6
2138                 case AF_INET6:
2139                         {
2140                                 /* invalid if we're not a v6 endpoint */
2141                                 struct sockaddr_in6 *sin6;
2142
2143                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2144                                         cnt_invalid++;
2145                                         if (asc->cnt == cnt_invalid)
2146                                                 return;
2147                                         else
2148                                                 continue;
2149                                 }
2150                                 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2151                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2152                                         /* we skip unspecifed addresses */
2153                                         continue;
2154                                 }
2155                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2156                                         if (stcb->asoc.local_scope == 0) {
2157                                                 continue;
2158                                         }
2159                                         /* is it the right link local scope? */
2160                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2161                                                 continue;
2162                                         }
2163                                 }
2164                                 break;
2165                         }
2166 #endif
2167                 case AF_INET:
2168                         {
2169                                 /* invalid if we are a v6 only endpoint */
2170                                 struct in6pcb *inp6;
2171                                 struct sockaddr_in *sin;
2172
2173                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2174                                 /* invalid if we are a v6 only endpoint */
2175                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2176                                     SCTP_IPV6_V6ONLY(inp6))
2177                                         continue;
2178
2179                                 sin = (struct sockaddr_in *)&ifa->address.sa;
2180                                 if (sin->sin_addr.s_addr == 0) {
2181                                         /* we skip unspecifed addresses */
2182                                         continue;
2183                                 }
2184                                 if (stcb->asoc.ipv4_local_scope == 0 &&
2185                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2186                                         continue;
2187                                 }
2188                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2189                                     SCTP_IPV6_V6ONLY(inp6)) {
2190                                         cnt_invalid++;
2191                                         if (asc->cnt == cnt_invalid)
2192                                                 return;
2193                                         else
2194                                                 continue;
2195                                 }
2196                                 break;
2197                         }
2198                 default:
2199                         /* invalid address family */
2200                         cnt_invalid++;
2201                         if (asc->cnt == cnt_invalid)
2202                                 return;
2203                         else
2204                                 continue;
2205                         break;
2206                 }
2207
2208                 if (type == SCTP_ADD_IP_ADDRESS) {
2209                         /* prevent this address from being used as a source */
2210                         sctp_add_local_addr_restricted(stcb, ifa);
2211                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2212                         struct sctp_nets *net;
2213
2214                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2215                                 sctp_rtentry_t *rt;
2216
2217                                 /* delete this address if cached */
2218                                 if (net->ro._s_addr == ifa) {
2219                                         sctp_free_ifa(net->ro._s_addr);
2220                                         net->ro._s_addr = NULL;
2221                                         net->src_addr_selected = 0;
2222                                         rt = net->ro.ro_rt;
2223                                         if (rt) {
2224                                                 RTFREE(rt);
2225                                                 net->ro.ro_rt = NULL;
2226                                         }
2227                                         /*
2228                                          * Now we deleted our src address,
2229                                          * should we not also now reset the
2230                                          * cwnd/rto to start as if its a new
2231                                          * address?
2232                                          */
2233                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2234                                         net->RTO = 0;
2235
2236                                 }
2237                         }
2238                 } else if (type == SCTP_SET_PRIM_ADDR) {
2239                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2240                                 /* must validate the ifa is in the ep */
2241                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2242                                         continue;
2243                                 }
2244                         } else {
2245                                 /* Need to check scopes for this guy */
2246                                 if (sctp_is_address_in_scope(ifa,
2247                                     stcb->asoc.ipv4_addr_legal,
2248                                     stcb->asoc.ipv6_addr_legal,
2249                                     stcb->asoc.loopback_scope,
2250                                     stcb->asoc.ipv4_local_scope,
2251                                     stcb->asoc.local_scope,
2252                                     stcb->asoc.site_scope, 0) == 0) {
2253                                         continue;
2254                                 }
2255                         }
2256                 }
2257                 /* queue an asconf for this address add/delete */
2258                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2259                     stcb->asoc.peer_supports_asconf) {
2260                         /* queue an asconf for this addr */
2261                         status = sctp_asconf_queue_add(stcb, ifa, type);
2262                         /*
2263                          * if queued ok, and in the open state, update the
2264                          * count of queued params.  If in the non-open
2265                          * state, these get sent when the assoc goes open.
2266                          */
2267                         if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2268                                 if (status >= 0) {
2269                                         num_queued++;
2270                                 }
2271                         }
2272                 }
2273         }
2274         /*
2275          * If we have queued params in the open state, send out an ASCONF.
2276          */
2277         if (num_queued > 0) {
2278                 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2279                     SCTP_ADDR_NOT_LOCKED);
2280         }
2281 }
2282
2283 void
2284 sctp_asconf_iterator_end(void *ptr, uint32_t val)
2285 {
2286         struct sctp_asconf_iterator *asc;
2287         struct sctp_ifa *ifa;
2288         struct sctp_laddr *l, *l_next;
2289
2290         asc = (struct sctp_asconf_iterator *)ptr;
2291         l = LIST_FIRST(&asc->list_of_work);
2292         while (l != NULL) {
2293                 l_next = LIST_NEXT(l, sctp_nxt_addr);
2294                 ifa = l->ifa;
2295                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2296                         /* Clear the defer use flag */
2297                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2298                 }
2299                 sctp_free_ifa(ifa);
2300                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2301                 SCTP_DECR_LADDR_COUNT();
2302                 l = l_next;
2303         }
2304         SCTP_FREE(asc, SCTP_M_ASC_IT);
2305 }
2306
2307 /*
2308  * sa is the sockaddr to ask the peer to set primary to.
2309  * returns: 0 = completed, -1 = error
2310  */
2311 int32_t
2312 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2313 {
2314         uint32_t vrf_id;
2315         struct sctp_ifa *ifa;
2316
2317         /* find the ifa for the desired set primary */
2318         vrf_id = stcb->asoc.vrf_id;
2319         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2320         if (ifa == NULL) {
2321                 /* Invalid address */
2322                 return (-1);
2323         }
2324         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2325         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2326                 /* set primary queuing succeeded */
2327                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2328                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2329                     stcb);
2330                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2331                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2332 #ifdef SCTP_TIMER_BASED_ASCONF
2333                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2334                             stcb->sctp_ep, stcb,
2335                             stcb->asoc.primary_destination);
2336 #else
2337                         sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2338                             SCTP_ADDR_NOT_LOCKED);
2339 #endif
2340                 }
2341         } else {
2342                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2343                     stcb);
2344                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2345                 return (-1);
2346         }
2347         return (0);
2348 }
2349
2350 void
2351 sctp_set_primary_ip_address(struct sctp_ifa *ifa)
2352 {
2353         struct sctp_inpcb *inp;
2354
2355         /* go through all our PCB's */
2356         LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
2357                 struct sctp_tcb *stcb;
2358
2359                 /* process for all associations for this endpoint */
2360                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2361                         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2362                         if (!sctp_asconf_queue_add(stcb, ifa,
2363                             SCTP_SET_PRIM_ADDR)) {
2364                                 /* set primary queuing succeeded */
2365                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ",
2366                                     stcb);
2367                                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa);
2368                                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2369 #ifdef SCTP_TIMER_BASED_ASCONF
2370                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2371                                             stcb->sctp_ep, stcb,
2372                                             stcb->asoc.primary_destination);
2373 #else
2374                                         sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2375                                             SCTP_ADDR_NOT_LOCKED);
2376 #endif
2377                                 }
2378                         }
2379                 }               /* for each stcb */
2380         }                       /* for each inp */
2381 }
2382
2383 int
2384 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2385 {
2386         struct sctp_tmit_chunk *chk, *nchk;
2387         unsigned int offset, asconf_limit;
2388         struct sctp_asconf_chunk *acp;
2389         struct sctp_asconf_paramhdr *aph;
2390         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2391         struct sctp_ipv6addr_param *p_addr;
2392         int add_cnt, del_cnt;
2393         uint16_t last_param_type;
2394
2395         add_cnt = del_cnt = 0;
2396         last_param_type = 0;
2397         for (chk = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); chk != NULL;
2398             chk = nchk) {
2399                 /* get next chk */
2400                 nchk = TAILQ_NEXT(chk, sctp_next);
2401
2402                 if (chk->data == NULL) {
2403                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2404                         continue;
2405                 }
2406                 offset = 0;
2407                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2408                 offset += sizeof(struct sctp_asconf_chunk);
2409                 asconf_limit = ntohs(acp->ch.chunk_length);
2410                 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2411                 if (p_addr == NULL) {
2412                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2413                         continue;
2414                 }
2415                 offset += ntohs(p_addr->ph.param_length);
2416
2417                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2418                 if (aph == NULL) {
2419                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2420                         continue;
2421                 }
2422                 while (aph != NULL) {
2423                         unsigned int param_length, param_type;
2424
2425                         param_type = ntohs(aph->ph.param_type);
2426                         param_length = ntohs(aph->ph.param_length);
2427                         if (offset + param_length > asconf_limit) {
2428                                 /* parameter goes beyond end of chunk! */
2429                                 break;
2430                         }
2431                         if (param_length > sizeof(aparam_buf)) {
2432                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2433                                 break;
2434                         }
2435                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2436                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2437                                 break;
2438                         }
2439                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2440                         if (aph == NULL) {
2441                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2442                                 break;
2443                         }
2444                         p_addr = (struct sctp_ipv6addr_param *)(aph + 1);
2445                         if (sctp_addr_match(p_addr, &sctp_ifa->address.sa) != 0) {
2446                                 switch (param_type) {
2447                                 case SCTP_ADD_IP_ADDRESS:
2448                                         add_cnt++;
2449                                         break;
2450                                 case SCTP_DEL_IP_ADDRESS:
2451                                         del_cnt++;
2452                                         break;
2453                                 default:
2454                                         break;
2455                                 }
2456                                 last_param_type = param_type;
2457                         }
2458                         offset += SCTP_SIZE32(param_length);
2459                         if (offset >= asconf_limit) {
2460                                 /* no more data in the mbuf chain */
2461                                 break;
2462                         }
2463                         /* get pointer to next asconf param */
2464                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2465                 }
2466         }
2467
2468         /*
2469          * we want to find the sequences which consist of ADD -> DEL -> ADD
2470          * or DEL -> ADD
2471          */
2472         if (add_cnt > del_cnt ||
2473             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2474                 return 1;
2475         }
2476         return 0;
2477 }
2478
2479 static struct sockaddr *
2480 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2481 {
2482         struct sctp_vrf *vrf = NULL;
2483         struct sctp_ifn *sctp_ifn;
2484         struct sctp_ifa *sctp_ifa;
2485
2486         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2487                 SCTP_IPI_ADDR_RLOCK();
2488         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2489         if (vrf == NULL) {
2490                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2491                         SCTP_IPI_ADDR_RUNLOCK();
2492                 return (NULL);
2493         }
2494         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2495                 if (stcb->asoc.loopback_scope == 0 &&
2496                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2497                         /* Skip if loopback_scope not set */
2498                         continue;
2499                 }
2500                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2501                         if (sctp_ifa->address.sa.sa_family == AF_INET &&
2502                             stcb->asoc.ipv4_addr_legal) {
2503                                 struct sockaddr_in *sin;
2504
2505                                 sin = (struct sockaddr_in *)&sctp_ifa->address.sa;
2506                                 if (sin->sin_addr.s_addr == 0) {
2507                                         /* skip unspecifed addresses */
2508                                         continue;
2509                                 }
2510                                 if (stcb->asoc.ipv4_local_scope == 0 &&
2511                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2512                                         continue;
2513
2514                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2515                                     (!sctp_is_addr_pending(stcb, sctp_ifa)))
2516                                         continue;
2517                                 /* found a valid local v4 address to use */
2518                                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2519                                         SCTP_IPI_ADDR_RUNLOCK();
2520                                 return (&sctp_ifa->address.sa);
2521                         } else if (sctp_ifa->address.sa.sa_family == AF_INET6 &&
2522                             stcb->asoc.ipv6_addr_legal) {
2523                                 struct sockaddr_in6 *sin6;
2524
2525                                 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2526                                         continue;
2527                                 }
2528                                 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa;
2529                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2530                                         /* we skip unspecifed addresses */
2531                                         continue;
2532                                 }
2533                                 if (stcb->asoc.local_scope == 0 &&
2534                                     IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2535                                         continue;
2536                                 if (stcb->asoc.site_scope == 0 &&
2537                                     IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2538                                         continue;
2539
2540                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2541                                     (!sctp_is_addr_pending(stcb, sctp_ifa)))
2542                                         continue;
2543                                 /* found a valid local v6 address to use */
2544                                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2545                                         SCTP_IPI_ADDR_RUNLOCK();
2546                                 return (&sctp_ifa->address.sa);
2547                         }
2548                 }
2549         }
2550         /* no valid addresses found */
2551         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2552                 SCTP_IPI_ADDR_RUNLOCK();
2553         return (NULL);
2554 }
2555
2556 static struct sockaddr *
2557 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2558 {
2559         struct sctp_laddr *laddr;
2560
2561         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2562                 if (laddr->ifa == NULL) {
2563                         continue;
2564                 }
2565                 /* is the address restricted ? */
2566                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2567                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2568                         continue;
2569
2570                 /* found a valid local address to use */
2571                 return (&laddr->ifa->address.sa);
2572         }
2573         /* no valid addresses found */
2574         return (NULL);
2575 }
2576
2577 /*
2578  * builds an ASCONF chunk from queued ASCONF params.
2579  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2580  */
2581 struct mbuf *
2582 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2583 {
2584         struct mbuf *m_asconf, *m_asconf_chk;
2585         struct sctp_asconf_addr *aa;
2586         struct sctp_asconf_chunk *acp;
2587         struct sctp_asconf_paramhdr *aph;
2588         struct sctp_asconf_addr_param *aap;
2589         uint32_t p_length;
2590         uint32_t correlation_id = 1;    /* 0 is reserved... */
2591         caddr_t ptr, lookup_ptr;
2592         uint8_t lookup_used = 0;
2593
2594         /* are there any asconf params to send? */
2595         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2596                 if (aa->sent == 0)
2597                         break;
2598         }
2599         if (aa == NULL)
2600                 return (NULL);
2601
2602         /*
2603          * get a chunk header mbuf and a cluster for the asconf params since
2604          * it's simpler to fill in the asconf chunk header lookup address on
2605          * the fly
2606          */
2607         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA);
2608         if (m_asconf_chk == NULL) {
2609                 /* no mbuf's */
2610                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2611                     "compose_asconf: couldn't get chunk mbuf!\n");
2612                 return (NULL);
2613         }
2614         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
2615         if (m_asconf == NULL) {
2616                 /* no mbuf's */
2617                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2618                     "compose_asconf: couldn't get mbuf!\n");
2619                 sctp_m_freem(m_asconf_chk);
2620                 return (NULL);
2621         }
2622         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2623         SCTP_BUF_LEN(m_asconf) = 0;
2624         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2625         bzero(acp, sizeof(struct sctp_asconf_chunk));
2626         /* save pointers to lookup address and asconf params */
2627         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2628         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2629
2630         /* fill in chunk header info */
2631         acp->ch.chunk_type = SCTP_ASCONF;
2632         acp->ch.chunk_flags = 0;
2633         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2634         stcb->asoc.asconf_seq_out++;
2635
2636         /* add parameters... up to smallest MTU allowed */
2637         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2638                 if (aa->sent)
2639                         continue;
2640                 /* get the parameter length */
2641                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2642                 /* will it fit in current chunk? */
2643                 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) {
2644                         /* won't fit, so we're done with this chunk */
2645                         break;
2646                 }
2647                 /* assign (and store) a correlation id */
2648                 aa->ap.aph.correlation_id = correlation_id++;
2649
2650                 /*
2651                  * fill in address if we're doing a delete this is a simple
2652                  * way for us to fill in the correlation address, which
2653                  * should only be used by the peer if we're deleting our
2654                  * source address and adding a new address (e.g. renumbering
2655                  * case)
2656                  */
2657                 if (lookup_used == 0 &&
2658                     (aa->special_del == 0) &&
2659                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2660                         struct sctp_ipv6addr_param *lookup;
2661                         uint16_t p_size, addr_size;
2662
2663                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2664                         lookup->ph.param_type =
2665                             htons(aa->ap.addrp.ph.param_type);
2666                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2667                                 /* copy IPv6 address */
2668                                 p_size = sizeof(struct sctp_ipv6addr_param);
2669                                 addr_size = sizeof(struct in6_addr);
2670                         } else {
2671                                 /* copy IPv4 address */
2672                                 p_size = sizeof(struct sctp_ipv4addr_param);
2673                                 addr_size = sizeof(struct in_addr);
2674                         }
2675                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2676                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2677                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2678                         lookup_used = 1;
2679                 }
2680                 /* copy into current space */
2681                 memcpy(ptr, &aa->ap, p_length);
2682
2683                 /* network elements and update lengths */
2684                 aph = (struct sctp_asconf_paramhdr *)ptr;
2685                 aap = (struct sctp_asconf_addr_param *)ptr;
2686                 /* correlation_id is transparent to peer, no htonl needed */
2687                 aph->ph.param_type = htons(aph->ph.param_type);
2688                 aph->ph.param_length = htons(aph->ph.param_length);
2689                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2690                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2691
2692                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2693                 ptr += SCTP_SIZE32(p_length);
2694
2695                 /*
2696                  * these params are removed off the pending list upon
2697                  * getting an ASCONF-ACK back from the peer, just set flag
2698                  */
2699                 aa->sent = 1;
2700         }
2701         /* check to see if the lookup addr has been populated yet */
2702         if (lookup_used == 0) {
2703                 /* NOTE: if the address param is optional, can skip this... */
2704                 /* add any valid (existing) address... */
2705                 struct sctp_ipv6addr_param *lookup;
2706                 uint16_t p_size, addr_size;
2707                 struct sockaddr *found_addr;
2708                 caddr_t addr_ptr;
2709
2710                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2711                         found_addr = sctp_find_valid_localaddr(stcb,
2712                             addr_locked);
2713                 else
2714                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2715
2716                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2717                 if (found_addr != NULL) {
2718                         if (found_addr->sa_family == AF_INET6) {
2719                                 /* copy IPv6 address */
2720                                 lookup->ph.param_type =
2721                                     htons(SCTP_IPV6_ADDRESS);
2722                                 p_size = sizeof(struct sctp_ipv6addr_param);
2723                                 addr_size = sizeof(struct in6_addr);
2724                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2725                                     found_addr)->sin6_addr;
2726                         } else {
2727                                 /* copy IPv4 address */
2728                                 lookup->ph.param_type =
2729                                     htons(SCTP_IPV4_ADDRESS);
2730                                 p_size = sizeof(struct sctp_ipv4addr_param);
2731                                 addr_size = sizeof(struct in_addr);
2732                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2733                                     found_addr)->sin_addr;
2734                         }
2735                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2736                         memcpy(lookup->addr, addr_ptr, addr_size);
2737                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2738                         lookup_used = 1;
2739                 } else {
2740                         /* uh oh... don't have any address?? */
2741                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2742                             "compose_asconf: no lookup addr!\n");
2743                         /* for now, we send a IPv4 address of 0.0.0.0 */
2744                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2745                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2746                         bzero(lookup->addr, sizeof(struct in_addr));
2747                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2748                         lookup_used = 1;
2749                 }
2750         }
2751         /* chain it all together */
2752         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2753         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2754         acp->ch.chunk_length = ntohs(*retlen);
2755
2756         return (m_asconf_chk);
2757 }
2758
2759 /*
2760  * section to handle address changes before an association is up eg. changes
2761  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2762  */
2763
2764 /*
2765  * processes the (local) addresses in the INIT-ACK chunk
2766  */
2767 static void
2768 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2769     unsigned int offset, unsigned int length)
2770 {
2771         struct sctp_paramhdr tmp_param, *ph;
2772         uint16_t plen, ptype;
2773         struct sctp_ifa *sctp_ifa;
2774         struct sctp_ipv6addr_param addr_store;
2775         struct sockaddr_in6 sin6;
2776         struct sockaddr_in sin;
2777         struct sockaddr *sa;
2778         uint32_t vrf_id;
2779
2780         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2781         if (stcb == NULL)       /* Un-needed check for SA */
2782                 return;
2783
2784         /* convert to upper bound */
2785         length += offset;
2786
2787         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2788                 return;
2789         }
2790         /* init the addresses */
2791         bzero(&sin6, sizeof(sin6));
2792         sin6.sin6_family = AF_INET6;
2793         sin6.sin6_len = sizeof(sin6);
2794         sin6.sin6_port = stcb->rport;
2795
2796         bzero(&sin, sizeof(sin));
2797         sin.sin_len = sizeof(sin);
2798         sin.sin_family = AF_INET;
2799         sin.sin_port = stcb->rport;
2800
2801         /* go through the addresses in the init-ack */
2802         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2803             sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2804         while (ph != NULL) {
2805                 ptype = ntohs(ph->param_type);
2806                 plen = ntohs(ph->param_length);
2807                 if (ptype == SCTP_IPV6_ADDRESS) {
2808                         struct sctp_ipv6addr_param *a6p;
2809
2810                         /* get the entire IPv6 address param */
2811                         a6p = (struct sctp_ipv6addr_param *)
2812                             sctp_m_getptr(m, offset,
2813                             sizeof(struct sctp_ipv6addr_param),
2814                             (uint8_t *) & addr_store);
2815                         if (plen != sizeof(struct sctp_ipv6addr_param) ||
2816                             a6p == NULL) {
2817                                 return;
2818                         }
2819                         memcpy(&sin6.sin6_addr, a6p->addr,
2820                             sizeof(struct in6_addr));
2821                         sa = (struct sockaddr *)&sin6;
2822                 } else if (ptype == SCTP_IPV4_ADDRESS) {
2823                         struct sctp_ipv4addr_param *a4p;
2824
2825                         /* get the entire IPv4 address param */
2826                         a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2827                             sizeof(struct sctp_ipv4addr_param),
2828                             (uint8_t *) & addr_store);
2829                         if (plen != sizeof(struct sctp_ipv4addr_param) ||
2830                             a4p == NULL) {
2831                                 return;
2832                         }
2833                         sin.sin_addr.s_addr = a4p->addr;
2834                         sa = (struct sockaddr *)&sin;
2835                 } else {
2836                         goto next_addr;
2837                 }
2838
2839                 /* see if this address really (still) exists */
2840                 if (stcb) {
2841                         vrf_id = stcb->asoc.vrf_id;
2842                 } else {
2843                         vrf_id = SCTP_DEFAULT_VRFID;
2844                 }
2845                 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id,
2846                     SCTP_ADDR_NOT_LOCKED);
2847                 if (sctp_ifa == NULL) {
2848                         /* address doesn't exist anymore */
2849                         int status;
2850
2851                         /* are ASCONFs allowed ? */
2852                         if ((sctp_is_feature_on(stcb->sctp_ep,
2853                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2854                             stcb->asoc.peer_supports_asconf) {
2855                                 /* queue an ASCONF DEL_IP_ADDRESS */
2856                                 status = sctp_asconf_queue_sa_delete(stcb, sa);
2857                                 /*
2858                                  * if queued ok, and in correct state, send
2859                                  * out the ASCONF.
2860                                  */
2861                                 if (status == 0 &&
2862                                     SCTP_GET_STATE(&stcb->asoc) ==
2863                                     SCTP_STATE_OPEN) {
2864 #ifdef SCTP_TIMER_BASED_ASCONF
2865                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2866                                             stcb->sctp_ep, stcb,
2867                                             stcb->asoc.primary_destination);
2868 #else
2869                                         sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2870                                             SCTP_ADDR_NOT_LOCKED);
2871 #endif
2872                                 }
2873                         }
2874                 }
2875 next_addr:
2876                 /*
2877                  * Sanity check:  Make sure the length isn't 0, otherwise
2878                  * we'll be stuck in this loop for a long time...
2879                  */
2880                 if (SCTP_SIZE32(plen) == 0) {
2881                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2882                             plen, ptype);
2883                         return;
2884                 }
2885                 /* get next parameter */
2886                 offset += SCTP_SIZE32(plen);
2887                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2888                         return;
2889                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2890                     sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2891         }                       /* while */
2892 }
2893
2894 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2895 /*
2896  * checks to see if a specific address is in the initack address list returns
2897  * 1 if found, 0 if not
2898  */
2899 static uint32_t
2900 sctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, uint32_t offset,
2901     uint32_t length, struct sockaddr *sa)
2902 {
2903         struct sctp_paramhdr tmp_param, *ph;
2904         uint16_t plen, ptype;
2905         struct sctp_ipv6addr_param addr_store;
2906         struct sockaddr_in *sin;
2907         struct sctp_ipv4addr_param *a4p;
2908
2909 #ifdef INET6
2910         struct sockaddr_in6 *sin6;
2911         struct sctp_ipv6addr_param *a6p;
2912         struct sockaddr_in6 sin6_tmp;
2913
2914 #endif                          /* INET6 */
2915
2916         if (
2917 #ifdef INET6
2918             (sa->sa_family != AF_INET6) &&
2919 #endif                          /* INET6 */
2920             (sa->sa_family != AF_INET))
2921                 return (0);
2922
2923         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2924         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2925         /* convert to upper bound */
2926         length += offset;
2927
2928         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2929                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2930                     "find_initack_addr: invalid offset?\n");
2931                 return (0);
2932         }
2933         /* go through the addresses in the init-ack */
2934         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2935             sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2936         while (ph != NULL) {
2937                 ptype = ntohs(ph->param_type);
2938                 plen = ntohs(ph->param_length);
2939 #ifdef INET6
2940                 if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) {
2941                         /* get the entire IPv6 address param */
2942                         a6p = (struct sctp_ipv6addr_param *)
2943                             sctp_m_getptr(m, offset,
2944                             sizeof(struct sctp_ipv6addr_param),
2945                             (uint8_t *) & addr_store);
2946                         if (plen != sizeof(struct sctp_ipv6addr_param) ||
2947                             (ph == NULL) ||
2948                             (a6p == NULL)) {
2949                                 return (0);
2950                         }
2951                         sin6 = (struct sockaddr_in6 *)sa;
2952                         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2953                                 /* create a copy and clear scope */
2954                                 memcpy(&sin6_tmp, sin6,
2955                                     sizeof(struct sockaddr_in6));
2956                                 sin6 = &sin6_tmp;
2957                                 in6_clearscope(&sin6->sin6_addr);
2958                         }
2959                         if (memcmp(&sin6->sin6_addr, a6p->addr,
2960                             sizeof(struct in6_addr)) == 0) {
2961                                 /* found it */
2962                                 return (1);
2963                         }
2964                 } else
2965 #endif                          /* INET6 */
2966
2967                         if (ptype == SCTP_IPV4_ADDRESS &&
2968                     sa->sa_family == AF_INET) {
2969                         /* get the entire IPv4 address param */
2970                         a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m,
2971                             offset, sizeof(struct sctp_ipv4addr_param),
2972                             (uint8_t *) & addr_store);
2973                         if (plen != sizeof(struct sctp_ipv4addr_param) ||
2974                             (ph == NULL) ||
2975                             (a4p == NULL)) {
2976                                 return (0);
2977                         }
2978                         sin = (struct sockaddr_in *)sa;
2979                         if (sin->sin_addr.s_addr == a4p->addr) {
2980                                 /* found it */
2981                                 return (1);
2982                         }
2983                 }
2984                 /* get next parameter */
2985                 offset += SCTP_SIZE32(plen);
2986                 if (offset + sizeof(struct sctp_paramhdr) > length)
2987                         return (0);
2988                 ph = (struct sctp_paramhdr *)
2989                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2990                     (uint8_t *) & tmp_param);
2991         }                       /* while */
2992         /* not found! */
2993         return (0);
2994 }
2995
2996 /*
2997  * makes sure that the current endpoint local addr list is consistent with
2998  * the new association (eg. subset bound, asconf allowed) adds addresses as
2999  * necessary
3000  */
3001 static void
3002 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3003     int length, struct sockaddr *init_addr)
3004 {
3005         struct sctp_laddr *laddr;
3006
3007         /* go through the endpoint list */
3008         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3009                 /* be paranoid and validate the laddr */
3010                 if (laddr->ifa == NULL) {
3011                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3012                             "check_addr_list_ep: laddr->ifa is NULL");
3013                         continue;
3014                 }
3015                 if (laddr->ifa == NULL) {
3016                         SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3017                         continue;
3018                 }
3019                 /* do i have it implicitly? */
3020                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3021                         continue;
3022                 }
3023                 /* check to see if in the init-ack */
3024                 if (!sctp_addr_in_initack(stcb, m, offset, length,
3025                     &laddr->ifa->address.sa)) {
3026                         /* try to add it */
3027                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3028                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3029                 }
3030         }
3031 }
3032
3033 /*
3034  * makes sure that the current kernel address list is consistent with the new
3035  * association (with all addrs bound) adds addresses as necessary
3036  */
3037 static void
3038 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3039     int length, struct sockaddr *init_addr,
3040     uint16_t local_scope, uint16_t site_scope,
3041     uint16_t ipv4_scope, uint16_t loopback_scope)
3042 {
3043         struct sctp_vrf *vrf = NULL;
3044         struct sctp_ifn *sctp_ifn;
3045         struct sctp_ifa *sctp_ifa;
3046         uint32_t vrf_id;
3047
3048         if (stcb) {
3049                 vrf_id = stcb->asoc.vrf_id;
3050         } else {
3051                 return;
3052         }
3053         SCTP_IPI_ADDR_RLOCK();
3054         vrf = sctp_find_vrf(vrf_id);
3055         if (vrf == NULL) {
3056                 SCTP_IPI_ADDR_RUNLOCK();
3057                 return;
3058         }
3059         /* go through all our known interfaces */
3060         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3061                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3062                         /* skip loopback interface */
3063                         continue;
3064                 }
3065                 /* go through each interface address */
3066                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3067                         /* do i have it implicitly? */
3068                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3069                                 continue;
3070                         }
3071                         /* check to see if in the init-ack */
3072                         if (!sctp_addr_in_initack(stcb, m, offset, length,
3073                             &sctp_ifa->address.sa)) {
3074                                 /* try to add it */
3075                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3076                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3077                                     SCTP_ADDR_LOCKED);
3078                         }
3079                 }               /* end foreach ifa */
3080         }                       /* end foreach ifn */
3081         SCTP_IPI_ADDR_RUNLOCK();
3082 }
3083
3084 /*
3085  * validates an init-ack chunk (from a cookie-echo) with current addresses
3086  * adds addresses from the init-ack into our local address list, if needed
3087  * queues asconf adds/deletes addresses as needed and makes appropriate list
3088  * changes for source address selection m, offset: points to the start of the
3089  * address list in an init-ack chunk length: total length of the address
3090  * params only init_addr: address where my INIT-ACK was sent from
3091  */
3092 void
3093 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3094     int length, struct sockaddr *init_addr,
3095     uint16_t local_scope, uint16_t site_scope,
3096     uint16_t ipv4_scope, uint16_t loopback_scope)
3097 {
3098         /* process the local addresses in the initack */
3099         sctp_process_initack_addresses(stcb, m, offset, length);
3100
3101         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3102                 /* bound all case */
3103                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3104                     local_scope, site_scope, ipv4_scope, loopback_scope);
3105         } else {
3106                 /* subset bound case */
3107                 if (sctp_is_feature_on(stcb->sctp_ep,
3108                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3109                         /* asconf's allowed */
3110                         sctp_check_address_list_ep(stcb, m, offset, length,
3111                             init_addr);
3112                 }
3113                 /* else, no asconfs allowed, so what we sent is what we get */
3114         }
3115 }
3116
3117 /*
3118  * sctp_bindx() support
3119  */
3120 uint32_t
3121 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3122     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3123 {
3124         struct sctp_ifa *ifa;
3125
3126         if (sa->sa_len == 0) {
3127                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3128                 return (EINVAL);
3129         }
3130         if (sctp_ifap) {
3131                 ifa = sctp_ifap;
3132         } else if (type == SCTP_ADD_IP_ADDRESS) {
3133                 /* For an add the address MUST be on the system */
3134                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3135         } else if (type == SCTP_DEL_IP_ADDRESS) {
3136                 /* For a delete we need to find it in the inp */
3137                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3138         } else {
3139                 ifa = NULL;
3140         }
3141         if (ifa != NULL) {
3142                 if (type == SCTP_ADD_IP_ADDRESS) {
3143                         sctp_add_local_addr_ep(inp, ifa, type);
3144                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3145                         struct sctp_laddr *laddr;
3146
3147                         if (inp->laddr_count < 2) {
3148                                 /* can't delete the last local address */
3149                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3150                                 return (EINVAL);
3151                         }
3152                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3153                             sctp_nxt_addr) {
3154                                 if (ifa == laddr->ifa) {
3155                                         /* Mark in the delete */
3156                                         laddr->action = type;
3157                                 }
3158                         }
3159                 }
3160                 if (!LIST_EMPTY(&inp->sctp_asoc_list)) {
3161                         /*
3162                          * There is no need to start the iterator if the inp
3163                          * has no associations.
3164                          */
3165                         struct sctp_asconf_iterator *asc;
3166                         struct sctp_laddr *wi;
3167
3168                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3169                             sizeof(struct sctp_asconf_iterator),
3170                             SCTP_M_ASC_IT);
3171                         if (asc == NULL) {
3172                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3173                                 return (ENOMEM);
3174                         }
3175                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3176                         if (wi == NULL) {
3177                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3178                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3179                                 return (ENOMEM);
3180                         }
3181                         LIST_INIT(&asc->list_of_work);
3182                         asc->cnt = 1;
3183                         SCTP_INCR_LADDR_COUNT();
3184                         wi->ifa = ifa;
3185                         wi->action = type;
3186                         atomic_add_int(&ifa->refcount, 1);
3187                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3188                         (void)sctp_initiate_iterator(sctp_asconf_iterator_ep,
3189                             sctp_asconf_iterator_stcb,
3190                             sctp_asconf_iterator_ep_end,
3191                             SCTP_PCB_ANY_FLAGS,
3192                             SCTP_PCB_ANY_FEATURES,
3193                             SCTP_ASOC_ANY_STATE,
3194                             (void *)asc, 0,
3195                             sctp_asconf_iterator_end, inp, 0);
3196                 }
3197                 return (0);
3198         } else {
3199                 /* invalid address! */
3200                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3201                 return (EADDRNOTAVAIL);
3202         }
3203 }
3204
3205 void
3206 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3207     struct sctp_nets *net)
3208 {
3209         struct sctp_asconf_addr *aa;
3210         struct sctp_ifa *sctp_ifap;
3211         struct sctp_asconf_tag_param *vtag;
3212         struct sockaddr_in *to;
3213
3214 #ifdef INET6
3215         struct sockaddr_in6 *to6;
3216
3217 #endif
3218         if (net == NULL) {
3219                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3220                 return;
3221         }
3222         if (stcb == NULL) {
3223                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3224                 return;
3225         }
3226         /*
3227          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3228          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3229          */
3230         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3231             SCTP_M_ASC_ADDR);
3232         if (aa == NULL) {
3233                 /* didn't get memory */
3234                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3235                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3236                 return;
3237         }
3238         aa->special_del = 0;
3239         /* fill in asconf address parameter fields */
3240         /* top level elements are "networked" during send */
3241         aa->ifa = NULL;
3242         aa->sent = 0;           /* clear sent flag */
3243         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3244         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3245         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3246         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3247         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3248         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3249
3250         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3251             SCTP_M_ASC_ADDR);
3252         if (aa == NULL) {
3253                 /* didn't get memory */
3254                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3255                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3256                 return;
3257         }
3258         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3259         /* fill in asconf address parameter fields */
3260         /* ADD(0.0.0.0) */
3261         if (net->ro._l_addr.sa.sa_family == AF_INET) {
3262                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3263                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3264                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3265                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3266                 /* No need to add an address, we are using 0.0.0.0 */
3267                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3268         }
3269 #ifdef INET6
3270         else if (net->ro._l_addr.sa.sa_family == AF_INET6) {
3271                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3272                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3273                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3274                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3275                 /* No need to add an address, we are using 0.0.0.0 */
3276                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3277         }
3278 #endif                          /* INET6 */
3279         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3280             SCTP_M_ASC_ADDR);
3281         if (aa == NULL) {
3282                 /* didn't get memory */
3283                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3284                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3285                 return;
3286         }
3287         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3288         /* fill in asconf address parameter fields */
3289         /* ADD(0.0.0.0) */
3290         if (net->ro._l_addr.sa.sa_family == AF_INET) {
3291                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3292                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3293                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3294                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3295                 /* No need to add an address, we are using 0.0.0.0 */
3296                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3297         }
3298 #ifdef INET6
3299         else if (net->ro._l_addr.sa.sa_family == AF_INET6) {
3300                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3301                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3302                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3303                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3304                 /* No need to add an address, we are using 0.0.0.0 */
3305                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3306         }
3307 #endif                          /* INET6 */
3308         /* Now we must hunt the addresses and add all global addresses */
3309         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3310                 struct sctp_vrf *vrf = NULL;
3311                 struct sctp_ifn *sctp_ifnp;
3312                 uint32_t vrf_id;
3313
3314                 vrf_id = stcb->sctp_ep->def_vrf_id;
3315                 vrf = sctp_find_vrf(vrf_id);
3316                 if (vrf == NULL) {
3317                         goto skip_rest;
3318                 }
3319                 SCTP_IPI_ADDR_RLOCK();
3320                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3321                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3322                                 if (sctp_ifap->address.sa.sa_family == AF_INET) {
3323                                         to = &sctp_ifap->address.sin;
3324
3325                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3326                                                 continue;
3327                                         }
3328                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3329                                                 continue;
3330                                         }
3331                                 }
3332 #ifdef INET6
3333                                 else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
3334                                         to6 = &sctp_ifap->address.sin6;
3335                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3336                                                 continue;
3337                                         }
3338                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3339                                                 continue;
3340                                         }
3341                                 }
3342 #endif
3343                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3344                         }
3345                 }
3346                 SCTP_IPI_ADDR_RUNLOCK();
3347         } else {
3348                 struct sctp_laddr *laddr;
3349
3350                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3351                         if (laddr->ifa == NULL) {
3352                                 continue;
3353                         }
3354                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3355                                 /*
3356                                  * Address being deleted by the system, dont
3357                                  * list.
3358                                  */
3359                                 continue;
3360                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3361                                 /*
3362                                  * Address being deleted on this ep don't
3363                                  * list.
3364                                  */
3365                                 continue;
3366                         }
3367                         sctp_ifap = laddr->ifa;
3368                         if (sctp_ifap->address.sa.sa_family == AF_INET) {
3369                                 to = &sctp_ifap->address.sin;
3370
3371                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3372                                         continue;
3373                                 }
3374                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3375                                         continue;
3376                                 }
3377                         }
3378 #ifdef INET6
3379                         else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
3380                                 to6 = &sctp_ifap->address.sin6;
3381                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3382                                         continue;
3383                                 }
3384                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3385                                         continue;
3386                                 }
3387                         }
3388 #endif
3389                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3390                 }
3391         }
3392 skip_rest:
3393         /* Now we must send the asconf into the queue */
3394         sctp_send_asconf(stcb, net, 0);
3395 }