sys/netinet/sctp_asconf.c

   1 /*-
   2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /* $KAME: sctp_asconf.c,v 1.24 2005/03/06 16:04:16 itojun Exp $  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37 #include <netinet/sctp_os.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctp_header.h>
  42 #include <netinet/sctputil.h>
  43 #include <netinet/sctp_output.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_timer.h>
  46
  47 /*
  48  * debug flags:
  49  * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
  50  * SCTP_DEBUG_ASCONF2: detailed info
  51  */
  52 #ifdef SCTP_DEBUG
  53 #endif                          /* SCTP_DEBUG */
  54
  55
  56 static void
  57 sctp_asconf_get_source_ip(struct mbuf *m, struct sockaddr *sa)
  58 {
  59         struct ip *iph;
  60
  61 #ifdef INET
  62         struct sockaddr_in *sin;
  63
  64 #endif
  65 #ifdef INET6
  66         struct sockaddr_in6 *sin6;
  67
  68 #endif
  69
  70         iph = mtod(m, struct ip *);
  71         switch (iph->ip_v) {
  72 #ifdef INET
  73         case IPVERSION:
  74                 {
  75                         /* IPv4 source */
  76                         sin = (struct sockaddr_in *)sa;
  77                         bzero(sin, sizeof(*sin));
  78                         sin->sin_family = AF_INET;
  79                         sin->sin_len = sizeof(struct sockaddr_in);
  80                         sin->sin_port = 0;
  81                         sin->sin_addr.s_addr = iph->ip_src.s_addr;
  82                         break;
  83                 }
  84 #endif
  85 #ifdef INET6
  86         case (IPV6_VERSION >> 4):
  87                 {
  88                         /* IPv6 source */
  89                         struct ip6_hdr *ip6;
  90
  91                         sin6 = (struct sockaddr_in6 *)sa;
  92                         bzero(sin6, sizeof(*sin6));
  93                         sin6->sin6_family = AF_INET6;
  94                         sin6->sin6_len = sizeof(struct sockaddr_in6);
  95                         sin6->sin6_port = 0;
  96                         ip6 = mtod(m, struct ip6_hdr *);
  97                         sin6->sin6_addr = ip6->ip6_src;
  98                         break;
  99                 }
 100 #endif                          /* INET6 */
 101         default:
 102                 break;
 103         }
 104         return;
 105 }
 106
 107 /*
 108  * draft-ietf-tsvwg-addip-sctp
 109  *
 110  * An ASCONF parameter queue exists per asoc which holds the pending address
 111  * operations.  Lists are updated upon receipt of ASCONF-ACK.
 112  *
 113  * A restricted_addrs list exists per assoc to hold local addresses that are
 114  * not (yet) usable by the assoc as a source address.  These addresses are
 115  * either pending an ASCONF operation (and exist on the ASCONF parameter
 116  * queue), or they are permanently restricted (the peer has returned an
 117  * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
 118  *
 119  * Deleted addresses are always immediately removed from the lists as they will
 120  * (shortly) no longer exist in the kernel.  We send ASCONFs as a courtesy,
 121  * only if allowed.
 122  */
 123
 124 /*
 125  * ASCONF parameter processing.
 126  * response_required: set if a reply is required (eg. SUCCESS_REPORT).
 127  * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
 128  * FIX: allocating this many mbufs on the fly is pretty inefficient...
 129  */
 130 static struct mbuf *
 131 sctp_asconf_success_response(uint32_t id)
 132 {
 133         struct mbuf *m_reply = NULL;
 134         struct sctp_asconf_paramhdr *aph;
 135
 136         m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
 137             0, M_DONTWAIT, 1, MT_DATA);
 138         if (m_reply == NULL) {
 139                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 140                     "asconf_success_response: couldn't get mbuf!\n");
 141                 return (NULL);
 142         }
 143         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 144         aph->correlation_id = id;
 145         aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
 146         aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
 147         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 148         aph->ph.param_length = htons(aph->ph.param_length);
 149
 150         return (m_reply);
 151 }
 152
 153 static struct mbuf *
 154 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv,
 155     uint16_t tlv_length)
 156 {
 157         struct mbuf *m_reply = NULL;
 158         struct sctp_asconf_paramhdr *aph;
 159         struct sctp_error_cause *error;
 160         uint8_t *tlv;
 161
 162         m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) +
 163             tlv_length +
 164             sizeof(struct sctp_error_cause)),
 165             0, M_DONTWAIT, 1, MT_DATA);
 166         if (m_reply == NULL) {
 167                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 168                     "asconf_error_response: couldn't get mbuf!\n");
 169                 return (NULL);
 170         }
 171         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 172         error = (struct sctp_error_cause *)(aph + 1);
 173
 174         aph->correlation_id = id;
 175         aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
 176         error->code = htons(cause);
 177         error->length = tlv_length + sizeof(struct sctp_error_cause);
 178         aph->ph.param_length = error->length +
 179             sizeof(struct sctp_asconf_paramhdr);
 180
 181         if (aph->ph.param_length > MLEN) {
 182                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 183                     "asconf_error_response: tlv_length (%xh) too big\n",
 184                     tlv_length);
 185                 sctp_m_freem(m_reply);  /* discard */
 186                 return (NULL);
 187         }
 188         if (error_tlv != NULL) {
 189                 tlv = (uint8_t *) (error + 1);
 190                 memcpy(tlv, error_tlv, tlv_length);
 191         }
 192         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 193         error->length = htons(error->length);
 194         aph->ph.param_length = htons(aph->ph.param_length);
 195
 196         return (m_reply);
 197 }
 198
 199 static struct mbuf *
 200 sctp_process_asconf_add_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
 201     struct sctp_tcb *stcb, int send_hb, int response_required)
 202 {
 203         struct sctp_nets *net;
 204         struct mbuf *m_reply = NULL;
 205         struct sockaddr_storage sa_source, sa_store;
 206         struct sctp_paramhdr *ph;
 207         uint16_t param_type, param_length, aparam_length;
 208         struct sockaddr *sa;
 209         int zero_address = 0;
 210         int bad_address = 0;
 211
 212 #ifdef INET
 213         struct sockaddr_in *sin;
 214         struct sctp_ipv4addr_param *v4addr;
 215
 216 #endif
 217 #ifdef INET6
 218         struct sockaddr_in6 *sin6;
 219         struct sctp_ipv6addr_param *v6addr;
 220
 221 #endif
 222
 223         aparam_length = ntohs(aph->ph.param_length);
 224         ph = (struct sctp_paramhdr *)(aph + 1);
 225         param_type = ntohs(ph->param_type);
 226         param_length = ntohs(ph->param_length);
 227
 228         sa = (struct sockaddr *)&sa_store;
 229         switch (param_type) {
 230 #ifdef INET
 231         case SCTP_IPV4_ADDRESS:
 232                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 233                         /* invalid param size */
 234                         return (NULL);
 235                 }
 236                 v4addr = (struct sctp_ipv4addr_param *)ph;
 237                 sin = (struct sockaddr_in *)&sa_store;
 238                 bzero(sin, sizeof(*sin));
 239                 sin->sin_family = AF_INET;
 240                 sin->sin_len = sizeof(struct sockaddr_in);
 241                 sin->sin_port = stcb->rport;
 242                 sin->sin_addr.s_addr = v4addr->addr;
 243                 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 244                     IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 245                         bad_address = 1;
 246                 }
 247                 if (sin->sin_addr.s_addr == INADDR_ANY)
 248                         zero_address = 1;
 249                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 250                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 251                 break;
 252 #endif
 253 #ifdef INET6
 254         case SCTP_IPV6_ADDRESS:
 255                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 256                         /* invalid param size */
 257                         return (NULL);
 258                 }
 259                 v6addr = (struct sctp_ipv6addr_param *)ph;
 260                 sin6 = (struct sockaddr_in6 *)&sa_store;
 261                 bzero(sin6, sizeof(*sin6));
 262                 sin6->sin6_family = AF_INET6;
 263                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 264                 sin6->sin6_port = stcb->rport;
 265                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 266                     sizeof(struct in6_addr));
 267                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 268                         bad_address = 1;
 269                 }
 270                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 271                         zero_address = 1;
 272                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 273                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 274                 break;
 275 #endif
 276         default:
 277                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 278                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph,
 279                     aparam_length);
 280                 return (m_reply);
 281         }                       /* end switch */
 282
 283         /* if 0.0.0.0/::0, add the source address instead */
 284         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 285                 sa = (struct sockaddr *)&sa_source;
 286                 sctp_asconf_get_source_ip(m, sa);
 287                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 288                     "process_asconf_add_ip: using source addr ");
 289                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 290         }
 291         /* add the address */
 292         if (bad_address) {
 293                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 294                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph,
 295                     aparam_length);
 296         } else if (sctp_add_remote_addr(stcb, sa, &net, SCTP_DONOT_SETSCOPE,
 297             SCTP_ADDR_DYNAMIC_ADDED) != 0) {
 298                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 299                     "process_asconf_add_ip: error adding address\n");
 300                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 301                     SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph,
 302                     aparam_length);
 303         } else {
 304                 /* notify upper layer */
 305                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 306                 if (response_required) {
 307                         m_reply =
 308                             sctp_asconf_success_response(aph->correlation_id);
 309                 }
 310                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
 311                 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
 312                     stcb, net);
 313                 if (send_hb) {
 314                         sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 315                 }
 316         }
 317         return (m_reply);
 318 }
 319
 320 static int
 321 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
 322 {
 323         struct sctp_nets *src_net, *net;
 324
 325         /* make sure the source address exists as a destination net */
 326         src_net = sctp_findnet(stcb, src);
 327         if (src_net == NULL) {
 328                 /* not found */
 329                 return (-1);
 330         }
 331         /* delete all destination addresses except the source */
 332         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 333                 if (net != src_net) {
 334                         /* delete this address */
 335                         sctp_remove_net(stcb, net);
 336                         SCTPDBG(SCTP_DEBUG_ASCONF1,
 337                             "asconf_del_remote_addrs_except: deleting ");
 338                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
 339                             (struct sockaddr *)&net->ro._l_addr);
 340                         /* notify upper layer */
 341                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
 342                             (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
 343                 }
 344         }
 345         return (0);
 346 }
 347
 348 static struct mbuf *
 349 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
 350     struct sctp_tcb *stcb, int response_required)
 351 {
 352         struct mbuf *m_reply = NULL;
 353         struct sockaddr_storage sa_source, sa_store;
 354         struct sctp_paramhdr *ph;
 355         uint16_t param_type, param_length, aparam_length;
 356         struct sockaddr *sa;
 357         int zero_address = 0;
 358         int result;
 359
 360 #ifdef INET
 361         struct sockaddr_in *sin;
 362         struct sctp_ipv4addr_param *v4addr;
 363
 364 #endif
 365 #ifdef INET6
 366         struct sockaddr_in6 *sin6;
 367         struct sctp_ipv6addr_param *v6addr;
 368
 369 #endif
 370
 371         /* get the source IP address for src and 0.0.0.0/::0 delete checks */
 372         sctp_asconf_get_source_ip(m, (struct sockaddr *)&sa_source);
 373
 374         aparam_length = ntohs(aph->ph.param_length);
 375         ph = (struct sctp_paramhdr *)(aph + 1);
 376         param_type = ntohs(ph->param_type);
 377         param_length = ntohs(ph->param_length);
 378
 379         sa = (struct sockaddr *)&sa_store;
 380         switch (param_type) {
 381 #ifdef INET
 382         case SCTP_IPV4_ADDRESS:
 383                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 384                         /* invalid param size */
 385                         return (NULL);
 386                 }
 387                 v4addr = (struct sctp_ipv4addr_param *)ph;
 388                 sin = (struct sockaddr_in *)&sa_store;
 389                 bzero(sin, sizeof(*sin));
 390                 sin->sin_family = AF_INET;
 391                 sin->sin_len = sizeof(struct sockaddr_in);
 392                 sin->sin_port = stcb->rport;
 393                 sin->sin_addr.s_addr = v4addr->addr;
 394                 if (sin->sin_addr.s_addr == INADDR_ANY)
 395                         zero_address = 1;
 396                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 397                     "process_asconf_delete_ip: deleting ");
 398                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 399                 break;
 400 #endif
 401 #ifdef INET6
 402         case SCTP_IPV6_ADDRESS:
 403                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 404                         /* invalid param size */
 405                         return (NULL);
 406                 }
 407                 v6addr = (struct sctp_ipv6addr_param *)ph;
 408                 sin6 = (struct sockaddr_in6 *)&sa_store;
 409                 bzero(sin6, sizeof(*sin6));
 410                 sin6->sin6_family = AF_INET6;
 411                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 412                 sin6->sin6_port = stcb->rport;
 413                 memcpy(&sin6->sin6_addr, v6addr->addr,
 414                     sizeof(struct in6_addr));
 415                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 416                         zero_address = 1;
 417                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 418                     "process_asconf_delete_ip: deleting ");
 419                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 420                 break;
 421 #endif
 422         default:
 423                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 424                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 425                     aparam_length);
 426                 return (m_reply);
 427         }
 428
 429         /* make sure the source address is not being deleted */
 430         if (sctp_cmpaddr(sa, (struct sockaddr *)&sa_source)) {
 431                 /* trying to delete the source address! */
 432                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
 433                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 434                     SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph,
 435                     aparam_length);
 436                 return (m_reply);
 437         }
 438         /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
 439         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 440                 result = sctp_asconf_del_remote_addrs_except(stcb,
 441                     (struct sockaddr *)&sa_source);
 442
 443                 if (result) {
 444                         /* src address did not exist? */
 445                         SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
 446                         /* what error to reply with?? */
 447                         m_reply =
 448                             sctp_asconf_error_response(aph->correlation_id,
 449                             SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph,
 450                             aparam_length);
 451                 } else if (response_required) {
 452                         m_reply =
 453                             sctp_asconf_success_response(aph->correlation_id);
 454                 }
 455                 return (m_reply);
 456         }
 457         /* delete the address */
 458         result = sctp_del_remote_addr(stcb, sa);
 459         /*
 460          * note if result == -2, the address doesn't exist in the asoc but
 461          * since it's being deleted anyways, we just ack the delete -- but
 462          * this probably means something has already gone awry
 463          */
 464         if (result == -1) {
 465                 /* only one address in the asoc */
 466                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
 467                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 468                     SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph,
 469                     aparam_length);
 470         } else {
 471                 if (response_required) {
 472                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 473                 }
 474                 /* notify upper layer */
 475                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 476         }
 477         return (m_reply);
 478 }
 479
 480 static struct mbuf *
 481 sctp_process_asconf_set_primary(struct mbuf *m,
 482     struct sctp_asconf_paramhdr *aph,
 483     struct sctp_tcb *stcb, int response_required)
 484 {
 485         struct mbuf *m_reply = NULL;
 486         struct sockaddr_storage sa_source, sa_store;
 487         struct sctp_paramhdr *ph;
 488         uint16_t param_type, param_length, aparam_length;
 489         struct sockaddr *sa;
 490         int zero_address = 0;
 491
 492 #ifdef INET
 493         struct sockaddr_in *sin;
 494         struct sctp_ipv4addr_param *v4addr;
 495
 496 #endif
 497 #ifdef INET6
 498         struct sockaddr_in6 *sin6;
 499         struct sctp_ipv6addr_param *v6addr;
 500
 501 #endif
 502
 503         aparam_length = ntohs(aph->ph.param_length);
 504         ph = (struct sctp_paramhdr *)(aph + 1);
 505         param_type = ntohs(ph->param_type);
 506         param_length = ntohs(ph->param_length);
 507
 508         sa = (struct sockaddr *)&sa_store;
 509         switch (param_type) {
 510 #ifdef INET
 511         case SCTP_IPV4_ADDRESS:
 512                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 513                         /* invalid param size */
 514                         return (NULL);
 515                 }
 516                 v4addr = (struct sctp_ipv4addr_param *)ph;
 517                 sin = (struct sockaddr_in *)&sa_store;
 518                 bzero(sin, sizeof(*sin));
 519                 sin->sin_family = AF_INET;
 520                 sin->sin_len = sizeof(struct sockaddr_in);
 521                 sin->sin_addr.s_addr = v4addr->addr;
 522                 if (sin->sin_addr.s_addr == INADDR_ANY)
 523                         zero_address = 1;
 524                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 525                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 526                 break;
 527 #endif
 528 #ifdef INET6
 529         case SCTP_IPV6_ADDRESS:
 530                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 531                         /* invalid param size */
 532                         return (NULL);
 533                 }
 534                 v6addr = (struct sctp_ipv6addr_param *)ph;
 535                 sin6 = (struct sockaddr_in6 *)&sa_store;
 536                 bzero(sin6, sizeof(*sin6));
 537                 sin6->sin6_family = AF_INET6;
 538                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 539                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 540                     sizeof(struct in6_addr));
 541                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 542                         zero_address = 1;
 543                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 544                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 545                 break;
 546 #endif
 547         default:
 548                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 549                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 550                     aparam_length);
 551                 return (m_reply);
 552         }
 553
 554         /* if 0.0.0.0/::0, use the source address instead */
 555         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 556                 sa = (struct sockaddr *)&sa_source;
 557                 sctp_asconf_get_source_ip(m, sa);
 558                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 559                     "process_asconf_set_primary: using source addr ");
 560                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 561         }
 562         /* set the primary address */
 563         if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
 564                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 565                     "process_asconf_set_primary: primary address set\n");
 566                 /* notify upper layer */
 567                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 568                 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) &&
 569                     (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) &&
 570                     (stcb->asoc.alternate)) {
 571                         sctp_free_remote_addr(stcb->asoc.alternate);
 572                         stcb->asoc.alternate = NULL;
 573                 }
 574                 if (response_required) {
 575                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 576                 }
 577                 /*
 578                  * Mobility adaptation. Ideally, when the reception of SET
 579                  * PRIMARY with DELETE IP ADDRESS of the previous primary
 580                  * destination, unacknowledged DATA are retransmitted
 581                  * immediately to the new primary destination for seamless
 582                  * handover. If the destination is UNCONFIRMED and marked to
 583                  * REQ_PRIM, The retransmission occur when reception of the
 584                  * HEARTBEAT-ACK.  (See sctp_handle_heartbeat_ack in
 585                  * sctp_input.c) Also, when change of the primary
 586                  * destination, it is better that all subsequent new DATA
 587                  * containing already queued DATA are transmitted to the new
 588                  * primary destination. (by micchie)
 589                  */
 590                 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
 591                     SCTP_MOBILITY_BASE) ||
 592                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 593                     SCTP_MOBILITY_FASTHANDOFF)) &&
 594                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 595                     SCTP_MOBILITY_PRIM_DELETED) &&
 596                     (stcb->asoc.primary_destination->dest_state &
 597                     SCTP_ADDR_UNCONFIRMED) == 0) {
 598
 599                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7);
 600                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 601                             SCTP_MOBILITY_FASTHANDOFF)) {
 602                                 sctp_assoc_immediate_retrans(stcb,
 603                                     stcb->asoc.primary_destination);
 604                         }
 605                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 606                             SCTP_MOBILITY_BASE)) {
 607                                 sctp_move_chunks_from_net(stcb,
 608                                     stcb->asoc.deleted_primary);
 609                         }
 610                         sctp_delete_prim_timer(stcb->sctp_ep, stcb,
 611                             stcb->asoc.deleted_primary);
 612                 }
 613         } else {
 614                 /* couldn't set the requested primary address! */
 615                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 616                     "process_asconf_set_primary: set primary failed!\n");
 617                 /* must have been an invalid address, so report */
 618                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 619                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
 620                     aparam_length);
 621         }
 622
 623         return (m_reply);
 624 }
 625
 626 /*
 627  * handles an ASCONF chunk.
 628  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 629  */
 630 void
 631 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 632     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 633     int first)
 634 {
 635         struct sctp_association *asoc;
 636         uint32_t serial_num;
 637         struct mbuf *n, *m_ack, *m_result, *m_tail;
 638         struct sctp_asconf_ack_chunk *ack_cp;
 639         struct sctp_asconf_paramhdr *aph, *ack_aph;
 640         struct sctp_ipv6addr_param *p_addr;
 641         unsigned int asconf_limit, cnt;
 642         int error = 0;          /* did an error occur? */
 643
 644         /* asconf param buffer */
 645         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 646         struct sctp_asconf_ack *ack, *ack_next;
 647
 648         /* verify minimum length */
 649         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 650                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 651                     "handle_asconf: chunk too small = %xh\n",
 652                     ntohs(cp->ch.chunk_length));
 653                 return;
 654         }
 655         asoc = &stcb->asoc;
 656         serial_num = ntohl(cp->serial_number);
 657
 658         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 659                 /* got a duplicate ASCONF */
 660                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 661                     "handle_asconf: got duplicate serial number = %xh\n",
 662                     serial_num);
 663                 return;
 664         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 665                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 666                     serial_num, asoc->asconf_seq_in + 1);
 667                 return;
 668         }
 669         /* it's the expected "next" sequence number, so process it */
 670         asoc->asconf_seq_in = serial_num;       /* update sequence */
 671         /* get length of all the param's in the ASCONF */
 672         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 673         SCTPDBG(SCTP_DEBUG_ASCONF1,
 674             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 675             asconf_limit, serial_num);
 676
 677         if (first) {
 678                 /* delete old cache */
 679                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 680
 681                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 682                         if (ack->serial_number == serial_num)
 683                                 break;
 684                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 685                             ack->serial_number, serial_num);
 686                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 687                         if (ack->data != NULL) {
 688                                 sctp_m_freem(ack->data);
 689                         }
 690                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 691                 }
 692         }
 693         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 694             M_DONTWAIT, 1, MT_DATA);
 695         if (m_ack == NULL) {
 696                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 697                     "handle_asconf: couldn't get mbuf!\n");
 698                 return;
 699         }
 700         m_tail = m_ack;         /* current reply chain's tail */
 701
 702         /* fill in ASCONF-ACK header */
 703         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 704         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 705         ack_cp->ch.chunk_flags = 0;
 706         ack_cp->serial_number = htonl(serial_num);
 707         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 708         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 709         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 710
 711         /* skip the lookup address parameter */
 712         offset += sizeof(struct sctp_asconf_chunk);
 713         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf);
 714         if (p_addr == NULL) {
 715                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 716                     "handle_asconf: couldn't get lookup addr!\n");
 717                 /* respond with a missing/invalid mandatory parameter error */
 718                 return;
 719         }
 720         /* param_length is already validated in process_control... */
 721         offset += ntohs(p_addr->ph.param_length);       /* skip lookup addr */
 722
 723         /* get pointer to first asconf param in ASCONF-ACK */
 724         ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk));
 725         if (ack_aph == NULL) {
 726                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n");
 727                 return;
 728         }
 729         /* get pointer to first asconf param in ASCONF */
 730         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf);
 731         if (aph == NULL) {
 732                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 733                 goto send_reply;
 734         }
 735         /* process through all parameters */
 736         cnt = 0;
 737         while (aph != NULL) {
 738                 unsigned int param_length, param_type;
 739
 740                 param_type = ntohs(aph->ph.param_type);
 741                 param_length = ntohs(aph->ph.param_length);
 742                 if (offset + param_length > asconf_limit) {
 743                         /* parameter goes beyond end of chunk! */
 744                         sctp_m_freem(m_ack);
 745                         return;
 746                 }
 747                 m_result = NULL;
 748
 749                 if (param_length > sizeof(aparam_buf)) {
 750                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 751                         sctp_m_freem(m_ack);
 752                         return;
 753                 }
 754                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 755                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 756                         sctp_m_freem(m_ack);
 757                 }
 758                 /* get the entire parameter */
 759                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 760                 if (aph == NULL) {
 761                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 762                         sctp_m_freem(m_ack);
 763                         return;
 764                 }
 765                 switch (param_type) {
 766                 case SCTP_ADD_IP_ADDRESS:
 767                         asoc->peer_supports_asconf = 1;
 768                         m_result = sctp_process_asconf_add_ip(m, aph, stcb,
 769                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 770                         cnt++;
 771                         break;
 772                 case SCTP_DEL_IP_ADDRESS:
 773                         asoc->peer_supports_asconf = 1;
 774                         m_result = sctp_process_asconf_delete_ip(m, aph, stcb,
 775                             error);
 776                         break;
 777                 case SCTP_ERROR_CAUSE_IND:
 778                         /* not valid in an ASCONF chunk */
 779                         break;
 780                 case SCTP_SET_PRIM_ADDR:
 781                         asoc->peer_supports_asconf = 1;
 782                         m_result = sctp_process_asconf_set_primary(m, aph,
 783                             stcb, error);
 784                         break;
 785                 case SCTP_NAT_VTAGS:
 786                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 787                         break;
 788                 case SCTP_SUCCESS_REPORT:
 789                         /* not valid in an ASCONF chunk */
 790                         break;
 791                 case SCTP_ULP_ADAPTATION:
 792                         /* FIX */
 793                         break;
 794                 default:
 795                         if ((param_type & 0x8000) == 0) {
 796                                 /* Been told to STOP at this param */
 797                                 asconf_limit = offset;
 798                                 /*
 799                                  * FIX FIX - We need to call
 800                                  * sctp_arethere_unrecognized_parameters()
 801                                  * to get a operr and send it for any
 802                                  * param's with the 0x4000 bit set OR do it
 803                                  * here ourselves... note we still must STOP
 804                                  * if the 0x8000 bit is clear.
 805                                  */
 806                         }
 807                         /* unknown/invalid param type */
 808                         break;
 809                 }               /* switch */
 810
 811                 /* add any (error) result to the reply mbuf chain */
 812                 if (m_result != NULL) {
 813                         SCTP_BUF_NEXT(m_tail) = m_result;
 814                         m_tail = m_result;
 815                         /* update lengths, make sure it's aligned too */
 816                         SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result));
 817                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 818                         /* set flag to force success reports */
 819                         error = 1;
 820                 }
 821                 offset += SCTP_SIZE32(param_length);
 822                 /* update remaining ASCONF message length to process */
 823                 if (offset >= asconf_limit) {
 824                         /* no more data in the mbuf chain */
 825                         break;
 826                 }
 827                 /* get pointer to next asconf param */
 828                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 829                     sizeof(struct sctp_asconf_paramhdr),
 830                     (uint8_t *) & aparam_buf);
 831                 if (aph == NULL) {
 832                         /* can't get an asconf paramhdr */
 833                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 834                         /* FIX ME - add error here... */
 835                 }
 836         }
 837
 838 send_reply:
 839         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 840         /* save the ASCONF-ACK reply */
 841         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 842             struct sctp_asconf_ack);
 843         if (ack == NULL) {
 844                 sctp_m_freem(m_ack);
 845                 return;
 846         }
 847         ack->serial_number = serial_num;
 848         ack->last_sent_to = NULL;
 849         ack->data = m_ack;
 850         ack->len = 0;
 851         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 852                 ack->len += SCTP_BUF_LEN(n);
 853         }
 854         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 855
 856         /* see if last_control_chunk_from is set properly (use IP src addr) */
 857         if (stcb->asoc.last_control_chunk_from == NULL) {
 858                 /*
 859                  * this could happen if the source address was just newly
 860                  * added
 861                  */
 862                 struct ip *iph;
 863                 struct sctphdr *sh;
 864                 struct sockaddr_storage from_store;
 865                 struct sockaddr *from = (struct sockaddr *)&from_store;
 866
 867                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 868                 /* pullup already done, IP options already stripped */
 869                 iph = mtod(m, struct ip *);
 870                 switch (iph->ip_v) {
 871 #ifdef INET
 872                 case IPVERSION:
 873                         {
 874                                 struct sockaddr_in *from4;
 875
 876                                 sh = (struct sctphdr *)((caddr_t)iph + sizeof(*iph));
 877                                 from4 = (struct sockaddr_in *)&from_store;
 878                                 bzero(from4, sizeof(*from4));
 879                                 from4->sin_family = AF_INET;
 880                                 from4->sin_len = sizeof(struct sockaddr_in);
 881                                 from4->sin_addr.s_addr = iph->ip_src.s_addr;
 882                                 from4->sin_port = sh->src_port;
 883                                 break;
 884                         }
 885 #endif
 886 #ifdef INET6
 887                 case IPV6_VERSION >> 4:
 888                         {
 889                                 struct ip6_hdr *ip6;
 890                                 struct sockaddr_in6 *from6;
 891
 892                                 ip6 = mtod(m, struct ip6_hdr *);
 893                                 sh = (struct sctphdr *)((caddr_t)ip6 + sizeof(*ip6));
 894                                 from6 = (struct sockaddr_in6 *)&from_store;
 895                                 bzero(from6, sizeof(*from6));
 896                                 from6->sin6_family = AF_INET6;
 897                                 from6->sin6_len = sizeof(struct sockaddr_in6);
 898                                 from6->sin6_addr = ip6->ip6_src;
 899                                 from6->sin6_port = sh->src_port;
 900                                 /*
 901                                  * Get the scopes in properly to the sin6
 902                                  * addr's
 903                                  */
 904                                 /* we probably don't need these operations */
 905                                 (void)sa6_recoverscope(from6);
 906                                 sa6_embedscope(from6,
 907                                     MODULE_GLOBAL(ip6_use_defzone));
 908
 909                                 break;
 910                         }
 911 #endif
 912                 default:
 913                         /* unknown address type */
 914                         from = NULL;
 915                 }
 916                 if (from != NULL) {
 917                         SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 918                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, from);
 919                         /* look up the from address */
 920                         stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, from);
 921 #ifdef SCTP_DEBUG
 922                         if (stcb->asoc.last_control_chunk_from == NULL)
 923                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 924 #endif
 925                 }
 926         }
 927 }
 928
 929 /*
 930  * does the address match? returns 0 if not, 1 if so
 931  */
 932 static uint32_t
 933 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 934 {
 935         switch (sa->sa_family) {
 936 #ifdef INET6
 937         case AF_INET6:
 938                 {
 939                         /* XXX scopeid */
 940                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 941
 942                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 943                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 944                             sizeof(struct in6_addr)) == 0)) {
 945                                 return (1);
 946                         }
 947                         break;
 948                 }
 949 #endif
 950 #ifdef INET
 951         case AF_INET:
 952                 {
 953                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 954
 955                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 956                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 957                             sizeof(struct in_addr)) == 0)) {
 958                                 return (1);
 959                         }
 960                         break;
 961                 }
 962 #endif
 963         default:
 964                 break;
 965         }
 966         return (0);
 967 }
 968
 969 /*
 970  * does the address match? returns 0 if not, 1 if so
 971  */
 972 static uint32_t
 973 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 974 {
 975         uint16_t param_type, param_length;
 976
 977         param_type = ntohs(ph->param_type);
 978         param_length = ntohs(ph->param_length);
 979         switch (sa->sa_family) {
 980 #ifdef INET6
 981         case AF_INET6:
 982                 {
 983                         /* XXX scopeid */
 984                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 985                         struct sctp_ipv6addr_param *v6addr;
 986
 987                         v6addr = (struct sctp_ipv6addr_param *)ph;
 988                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 989                             param_length == sizeof(struct sctp_ipv6addr_param) &&
 990                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 991                             sizeof(struct in6_addr)) == 0)) {
 992                                 return (1);
 993                         }
 994                         break;
 995                 }
 996 #endif
 997 #ifdef INET
 998         case AF_INET:
 999                 {
1000                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1001                         struct sctp_ipv4addr_param *v4addr;
1002
1003                         v4addr = (struct sctp_ipv4addr_param *)ph;
1004                         if ((param_type == SCTP_IPV4_ADDRESS) &&
1005                             param_length == sizeof(struct sctp_ipv4addr_param) &&
1006                             (memcmp(&v4addr->addr, &sin->sin_addr,
1007                             sizeof(struct in_addr)) == 0)) {
1008                                 return (1);
1009                         }
1010                         break;
1011                 }
1012 #endif
1013         default:
1014                 break;
1015         }
1016         return (0);
1017 }
1018
1019 /*
1020  * Cleanup for non-responded/OP ERR'd ASCONF
1021  */
1022 void
1023 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
1024 {
1025         /* mark peer as ASCONF incapable */
1026         stcb->asoc.peer_supports_asconf = 0;
1027         /*
1028          * clear out any existing asconfs going out
1029          */
1030         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1031             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
1032         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
1033         /* remove the old ASCONF on our outbound queue */
1034         sctp_toss_old_asconf(stcb);
1035 }
1036
1037 /*
1038  * cleanup any cached source addresses that may be topologically
1039  * incorrect after a new address has been added to this interface.
1040  */
1041 static void
1042 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
1043 {
1044         struct sctp_nets *net;
1045
1046         /*
1047          * Ideally, we want to only clear cached routes and source addresses
1048          * that are topologically incorrect.  But since there is no easy way
1049          * to know whether the newly added address on the ifn would cause a
1050          * routing change (i.e. a new egress interface would be chosen)
1051          * without doing a new routing lookup and source address selection,
1052          * we will (for now) just flush any cached route using a different
1053          * ifn (and cached source addrs) and let output re-choose them
1054          * during the next send on that net.
1055          */
1056         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1057                 /*
1058                  * clear any cached route (and cached source address) if the
1059                  * route's interface is NOT the same as the address change.
1060                  * If it's the same interface, just clear the cached source
1061                  * address.
1062                  */
1063                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
1064                     ((ifn == NULL) ||
1065                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
1066                         /* clear any cached route */
1067                         RTFREE(net->ro.ro_rt);
1068                         net->ro.ro_rt = NULL;
1069                 }
1070                 /* clear any cached source address */
1071                 if (net->src_addr_selected) {
1072                         sctp_free_ifa(net->ro._s_addr);
1073                         net->ro._s_addr = NULL;
1074                         net->src_addr_selected = 0;
1075                 }
1076         }
1077 }
1078
1079
1080 void
1081 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
1082 {
1083         int error;
1084
1085         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
1086                 return;
1087         }
1088         if (stcb->asoc.deleted_primary == NULL) {
1089                 return;
1090         }
1091         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
1092                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
1093                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1094                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
1095                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
1096                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
1097                     stcb->asoc.deleted_primary,
1098                     SCTP_FROM_SCTP_TIMER + SCTP_LOC_8);
1099                 stcb->asoc.num_send_timers_up--;
1100                 if (stcb->asoc.num_send_timers_up < 0) {
1101                         stcb->asoc.num_send_timers_up = 0;
1102                 }
1103                 SCTP_TCB_LOCK_ASSERT(stcb);
1104                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1105                     stcb->asoc.deleted_primary);
1106                 if (error) {
1107                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1108                         return;
1109                 }
1110                 SCTP_TCB_LOCK_ASSERT(stcb);
1111 #ifdef SCTP_AUDITING_ENABLED
1112                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1113 #endif
1114                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1115                 if ((stcb->asoc.num_send_timers_up == 0) &&
1116                     (stcb->asoc.sent_queue_cnt > 0)) {
1117                         struct sctp_tmit_chunk *chk;
1118
1119                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1120                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1121                             stcb, chk->whoTo);
1122                 }
1123         }
1124         return;
1125 }
1126
1127 static int
1128     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1129
1130 void
1131 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1132 {
1133         struct sctp_tmit_chunk *chk;
1134
1135         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1136         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1137             SCTP_FROM_SCTP_TIMER + SCTP_LOC_5);
1138         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1139         net->error_count = 0;
1140         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1141                 if (chk->whoTo == net) {
1142                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1143                                 chk->sent = SCTP_DATAGRAM_RESEND;
1144                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1145                                 sctp_flight_size_decrease(chk);
1146                                 sctp_total_flight_decrease(stcb, chk);
1147                                 net->marked_retrans++;
1148                                 stcb->asoc.marked_retrans++;
1149                         }
1150                 }
1151         }
1152         if (net->marked_retrans) {
1153                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1154         }
1155 }
1156
1157 static void
1158 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1159 {
1160         struct sctp_nets *net;
1161         int addrnum, changed;
1162
1163         /*
1164          * If number of local valid addresses is 1, the valid address is
1165          * probably newly added address. Several valid addresses in this
1166          * association.  A source address may not be changed.  Additionally,
1167          * they can be configured on a same interface as "alias" addresses.
1168          * (by micchie)
1169          */
1170         addrnum = sctp_local_addr_count(stcb);
1171         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1172             addrnum);
1173         if (addrnum == 1) {
1174                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1175                         /* clear any cached route and source address */
1176                         if (net->ro.ro_rt) {
1177                                 RTFREE(net->ro.ro_rt);
1178                                 net->ro.ro_rt = NULL;
1179                         }
1180                         if (net->src_addr_selected) {
1181                                 sctp_free_ifa(net->ro._s_addr);
1182                                 net->ro._s_addr = NULL;
1183                                 net->src_addr_selected = 0;
1184                         }
1185                         /* Retransmit unacknowledged DATA chunks immediately */
1186                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1187                             SCTP_MOBILITY_FASTHANDOFF)) {
1188                                 sctp_net_immediate_retrans(stcb, net);
1189                         }
1190                         /* also, SET PRIMARY is maybe already sent */
1191                 }
1192                 return;
1193         }
1194         /* Multiple local addresses exsist in the association.  */
1195         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1196                 /* clear any cached route and source address */
1197                 if (net->ro.ro_rt) {
1198                         RTFREE(net->ro.ro_rt);
1199                         net->ro.ro_rt = NULL;
1200                 }
1201                 if (net->src_addr_selected) {
1202                         sctp_free_ifa(net->ro._s_addr);
1203                         net->ro._s_addr = NULL;
1204                         net->src_addr_selected = 0;
1205                 }
1206                 /*
1207                  * Check if the nexthop is corresponding to the new address.
1208                  * If the new address is corresponding to the current
1209                  * nexthop, the path will be changed. If the new address is
1210                  * NOT corresponding to the current nexthop, the path will
1211                  * not be changed.
1212                  */
1213                 SCTP_RTALLOC((sctp_route_t *) & net->ro,
1214                     stcb->sctp_ep->def_vrf_id);
1215                 if (net->ro.ro_rt == NULL)
1216                         continue;
1217
1218                 changed = 0;
1219                 switch (net->ro._l_addr.sa.sa_family) {
1220 #ifdef INET
1221                 case AF_INET:
1222                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) {
1223                                 changed = 1;
1224                         }
1225                         break;
1226 #endif
1227 #ifdef INET6
1228                 case AF_INET6:
1229                         if (sctp_v6src_match_nexthop(
1230                             &newifa->address.sin6, (sctp_route_t *) & net->ro)) {
1231                                 changed = 1;
1232                         }
1233                         break;
1234 #endif
1235                 default:
1236                         break;
1237                 }
1238                 /*
1239                  * if the newly added address does not relate routing
1240                  * information, we skip.
1241                  */
1242                 if (changed == 0)
1243                         continue;
1244                 /* Retransmit unacknowledged DATA chunks immediately */
1245                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1246                     SCTP_MOBILITY_FASTHANDOFF)) {
1247                         sctp_net_immediate_retrans(stcb, net);
1248                 }
1249                 /* Send SET PRIMARY for this new address */
1250                 if (net == stcb->asoc.primary_destination) {
1251                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1252                             SCTP_SET_PRIM_ADDR);
1253                 }
1254         }
1255 }
1256
1257 /*
1258  * process an ADD/DELETE IP ack from peer.
1259  * addr: corresponding sctp_ifa to the address being added/deleted.
1260  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1261  * flag: 1=success, 0=failure.
1262  */
1263 static void
1264 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1265 {
1266         /*
1267          * do the necessary asoc list work- if we get a failure indication,
1268          * leave the address on the assoc's restricted list.  If we get a
1269          * success indication, remove the address from the restricted list.
1270          */
1271         /*
1272          * Note: this will only occur for ADD_IP_ADDRESS, since
1273          * DEL_IP_ADDRESS is never actually added to the list...
1274          */
1275         if (flag) {
1276                 /* success case, so remove from the restricted list */
1277                 sctp_del_local_addr_restricted(stcb, addr);
1278
1279                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1280                     SCTP_MOBILITY_BASE) ||
1281                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1282                     SCTP_MOBILITY_FASTHANDOFF)) {
1283                         sctp_path_check_and_react(stcb, addr);
1284                         return;
1285                 }
1286                 /* clear any cached/topologically incorrect source addresses */
1287                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1288         }
1289         /* else, leave it on the list */
1290 }
1291
1292 /*
1293  * add an asconf add/delete/set primary IP address parameter to the queue.
1294  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1295  * returns 0 if queued, -1 if not queued/removed.
1296  * NOTE: if adding, but a delete for the same address is already scheduled
1297  * (and not yet sent out), simply remove it from queue.  Same for deleting
1298  * an address already scheduled for add.  If a duplicate operation is found,
1299  * ignore the new one.
1300  */
1301 static int
1302 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1303     uint16_t type)
1304 {
1305         struct sctp_asconf_addr *aa, *aa_next;
1306         struct sockaddr *sa;
1307
1308         /* make sure the request isn't already in the queue */
1309         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1310                 /* address match? */
1311                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1312                         continue;
1313                 /*
1314                  * is the request already in queue but not sent? pass the
1315                  * request already sent in order to resolve the following
1316                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1317                  * can't remove the ADD request already sent 3. arrival of
1318                  * ADD
1319                  */
1320                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1321                         return (-1);
1322                 }
1323                 /* is the negative request already in queue, and not sent */
1324                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1325                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1326                         /* add requested, delete already queued */
1327                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1328                         /* remove the ifa from the restricted list */
1329                         sctp_del_local_addr_restricted(stcb, ifa);
1330                         /* free the asconf param */
1331                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1332                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1333                         return (-1);
1334                 }
1335                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1336                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1337                         /* delete requested, add already queued */
1338                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1339                         /* remove the aa->ifa from the restricted list */
1340                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1341                         /* free the asconf param */
1342                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1343                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1344                         return (-1);
1345                 }
1346         }                       /* for each aa */
1347
1348         /* adding new request to the queue */
1349         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1350             SCTP_M_ASC_ADDR);
1351         if (aa == NULL) {
1352                 /* didn't get memory */
1353                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1354                 return (-1);
1355         }
1356         aa->special_del = 0;
1357         /* fill in asconf address parameter fields */
1358         /* top level elements are "networked" during send */
1359         aa->ap.aph.ph.param_type = type;
1360         aa->ifa = ifa;
1361         atomic_add_int(&ifa->refcount, 1);
1362         /* correlation_id filled in during send routine later... */
1363         switch (ifa->address.sa.sa_family) {
1364 #ifdef INET6
1365         case AF_INET6:
1366                 {
1367                         struct sockaddr_in6 *sin6;
1368
1369                         sin6 = (struct sockaddr_in6 *)&ifa->address.sa;
1370                         sa = (struct sockaddr *)sin6;
1371                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1372                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1373                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1374                             sizeof(struct sctp_ipv6addr_param);
1375                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1376                             sizeof(struct in6_addr));
1377                         break;
1378                 }
1379 #endif
1380 #ifdef INET
1381         case AF_INET:
1382                 {
1383                         struct sockaddr_in *sin;
1384
1385                         sin = (struct sockaddr_in *)&ifa->address.sa;
1386                         sa = (struct sockaddr *)sin;
1387                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1388                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1389                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1390                             sizeof(struct sctp_ipv4addr_param);
1391                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1392                             sizeof(struct in_addr));
1393                         break;
1394                 }
1395 #endif
1396         default:
1397                 /* invalid family! */
1398                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1399                 sctp_free_ifa(ifa);
1400                 return (-1);
1401         }
1402         aa->sent = 0;           /* clear sent flag */
1403
1404         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1405 #ifdef SCTP_DEBUG
1406         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1407                 if (type == SCTP_ADD_IP_ADDRESS) {
1408                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1409                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1410                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1411                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1412                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1413                 } else {
1414                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1415                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1416                 }
1417         }
1418 #endif
1419
1420         return (0);
1421 }
1422
1423
1424 /*
1425  * add an asconf operation for the given ifa and type.
1426  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1427  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1428  * advisable.
1429  */
1430 static int
1431 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1432     uint16_t type)
1433 {
1434         uint32_t status;
1435         int pending_delete_queued = 0;
1436
1437         /* see if peer supports ASCONF */
1438         if (stcb->asoc.peer_supports_asconf == 0) {
1439                 return (-1);
1440         }
1441         /*
1442          * if this is deleting the last address from the assoc, mark it as
1443          * pending.
1444          */
1445         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending &&
1446             (sctp_local_addr_count(stcb) < 2)) {
1447                 /* set the pending delete info only */
1448                 stcb->asoc.asconf_del_pending = 1;
1449                 stcb->asoc.asconf_addr_del_pending = ifa;
1450                 atomic_add_int(&ifa->refcount, 1);
1451                 SCTPDBG(SCTP_DEBUG_ASCONF2,
1452                     "asconf_queue_add: mark delete last address pending\n");
1453                 return (-1);
1454         }
1455         /* queue an asconf parameter */
1456         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1457
1458         /*
1459          * if this is an add, and there is a delete also pending (i.e. the
1460          * last local address is being changed), queue the pending delete
1461          * too.
1462          */
1463         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1464                 /* queue in the pending delete */
1465                 if (sctp_asconf_queue_mgmt(stcb,
1466                     stcb->asoc.asconf_addr_del_pending,
1467                     SCTP_DEL_IP_ADDRESS) == 0) {
1468                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n");
1469                         pending_delete_queued = 1;
1470                         /* clear out the pending delete info */
1471                         stcb->asoc.asconf_del_pending = 0;
1472                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1473                         stcb->asoc.asconf_addr_del_pending = NULL;
1474                 }
1475         }
1476         if (pending_delete_queued) {
1477                 struct sctp_nets *net;
1478
1479                 /*
1480                  * since we know that the only/last address is now being
1481                  * changed in this case, reset the cwnd/rto on all nets to
1482                  * start as a new address and path.  Also clear the error
1483                  * counts to give the assoc the best chance to complete the
1484                  * address change.
1485                  */
1486                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1487                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1488                             net);
1489                         net->RTO = 0;
1490                         net->error_count = 0;
1491                 }
1492                 stcb->asoc.overall_error_count = 0;
1493                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1494                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1495                             stcb->asoc.overall_error_count,
1496                             0,
1497                             SCTP_FROM_SCTP_ASCONF,
1498                             __LINE__);
1499                 }
1500                 /* queue in an advisory set primary too */
1501                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1502                 /* let caller know we should send this out immediately */
1503                 status = 1;
1504         }
1505         return (status);
1506 }
1507
1508 /*-
1509  * add an asconf delete IP address parameter to the queue by sockaddr and
1510  * possibly with no sctp_ifa available.  This is only called by the routine
1511  * that checks the addresses in an INIT-ACK against the current address list.
1512  * returns 0 if completed, non-zero if not completed.
1513  * NOTE: if an add is already scheduled (and not yet sent out), simply
1514  * remove it from queue.  If a duplicate operation is found, ignore the
1515  * new one.
1516  */
1517 static int
1518 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1519 {
1520         struct sctp_ifa *ifa;
1521         struct sctp_asconf_addr *aa, *aa_next;
1522         uint32_t vrf_id;
1523
1524         if (stcb == NULL) {
1525                 return (-1);
1526         }
1527         /* see if peer supports ASCONF */
1528         if (stcb->asoc.peer_supports_asconf == 0) {
1529                 return (-1);
1530         }
1531         /* make sure the request isn't already in the queue */
1532         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1533                 /* address match? */
1534                 if (sctp_asconf_addr_match(aa, sa) == 0)
1535                         continue;
1536                 /* is the request already in queue (sent or not) */
1537                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1538                         return (-1);
1539                 }
1540                 /* is the negative request already in queue, and not sent */
1541                 if (aa->sent == 1)
1542                         continue;
1543                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1544                         /* add already queued, so remove existing entry */
1545                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1546                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1547                         /* free the entry */
1548                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1549                         return (-1);
1550                 }
1551         }                       /* for each aa */
1552
1553         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1554         if (stcb) {
1555                 vrf_id = stcb->asoc.vrf_id;
1556         } else {
1557                 vrf_id = SCTP_DEFAULT_VRFID;
1558         }
1559         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
1560
1561         /* adding new request to the queue */
1562         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1563             SCTP_M_ASC_ADDR);
1564         if (aa == NULL) {
1565                 /* didn't get memory */
1566                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1567                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1568                 return (-1);
1569         }
1570         aa->special_del = 0;
1571         /* fill in asconf address parameter fields */
1572         /* top level elements are "networked" during send */
1573         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1574         aa->ifa = ifa;
1575         if (ifa)
1576                 atomic_add_int(&ifa->refcount, 1);
1577         /* correlation_id filled in during send routine later... */
1578         switch (sa->sa_family) {
1579 #ifdef INET6
1580         case AF_INET6:
1581                 {
1582                         /* IPv6 address */
1583                         struct sockaddr_in6 *sin6;
1584
1585                         sin6 = (struct sockaddr_in6 *)sa;
1586                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1587                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1588                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1589                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1590                             sizeof(struct in6_addr));
1591                         break;
1592                 }
1593 #endif
1594 #ifdef INET
1595         case AF_INET:
1596                 {
1597                         /* IPv4 address */
1598                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1599
1600                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1601                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1602                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1603                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1604                             sizeof(struct in_addr));
1605                         break;
1606                 }
1607 #endif
1608         default:
1609                 /* invalid family! */
1610                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1611                 if (ifa)
1612                         sctp_free_ifa(ifa);
1613                 return (-1);
1614         }
1615         aa->sent = 0;           /* clear sent flag */
1616
1617         /* delete goes to the back of the queue */
1618         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1619
1620         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1621         return (0);
1622 }
1623
1624 /*
1625  * find a specific asconf param on our "sent" queue
1626  */
1627 static struct sctp_asconf_addr *
1628 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1629 {
1630         struct sctp_asconf_addr *aa;
1631
1632         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1633                 if (aa->ap.aph.correlation_id == correlation_id &&
1634                     aa->sent == 1) {
1635                         /* found it */
1636                         return (aa);
1637                 }
1638         }
1639         /* didn't find it */
1640         return (NULL);
1641 }
1642
1643 /*
1644  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1645  * notifications based on the error response
1646  */
1647 static void
1648 sctp_asconf_process_error(struct sctp_tcb *stcb,
1649     struct sctp_asconf_paramhdr *aph)
1650 {
1651         struct sctp_error_cause *eh;
1652         struct sctp_paramhdr *ph;
1653         uint16_t param_type;
1654         uint16_t error_code;
1655
1656         eh = (struct sctp_error_cause *)(aph + 1);
1657         ph = (struct sctp_paramhdr *)(eh + 1);
1658         /* validate lengths */
1659         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1660             htons(aph->ph.param_length)) {
1661                 /* invalid error cause length */
1662                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1663                     "asconf_process_error: cause element too long\n");
1664                 return;
1665         }
1666         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1667             htons(eh->length)) {
1668                 /* invalid included TLV length */
1669                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1670                     "asconf_process_error: included TLV too long\n");
1671                 return;
1672         }
1673         /* which error code ? */
1674         error_code = ntohs(eh->code);
1675         param_type = ntohs(aph->ph.param_type);
1676         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1677         switch (error_code) {
1678         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1679                 /* we allow ourselves to "try again" for this error */
1680                 break;
1681         default:
1682                 /* peer can't handle it... */
1683                 switch (param_type) {
1684                 case SCTP_ADD_IP_ADDRESS:
1685                 case SCTP_DEL_IP_ADDRESS:
1686                         stcb->asoc.peer_supports_asconf = 0;
1687                         break;
1688                 case SCTP_SET_PRIM_ADDR:
1689                         stcb->asoc.peer_supports_asconf = 0;
1690                         break;
1691                 default:
1692                         break;
1693                 }
1694         }
1695 }
1696
1697 /*
1698  * process an asconf queue param.
1699  * aparam: parameter to process, will be removed from the queue.
1700  * flag: 1=success case, 0=failure case
1701  */
1702 static void
1703 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1704     struct sctp_asconf_addr *aparam, uint32_t flag)
1705 {
1706         uint16_t param_type;
1707
1708         /* process this param */
1709         param_type = aparam->ap.aph.ph.param_type;
1710         switch (param_type) {
1711         case SCTP_ADD_IP_ADDRESS:
1712                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1713                     "process_param_ack: added IP address\n");
1714                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1715                 break;
1716         case SCTP_DEL_IP_ADDRESS:
1717                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1718                     "process_param_ack: deleted IP address\n");
1719                 /* nothing really to do... lists already updated */
1720                 break;
1721         case SCTP_SET_PRIM_ADDR:
1722                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1723                     "process_param_ack: set primary IP address\n");
1724                 /* nothing to do... peer may start using this addr */
1725                 if (flag == 0)
1726                         stcb->asoc.peer_supports_asconf = 0;
1727                 break;
1728         default:
1729                 /* should NEVER happen */
1730                 break;
1731         }
1732
1733         /* remove the param and free it */
1734         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1735         if (aparam->ifa)
1736                 sctp_free_ifa(aparam->ifa);
1737         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1738 }
1739
1740 /*
1741  * cleanup from a bad asconf ack parameter
1742  */
1743 static void
1744 sctp_asconf_ack_clear(struct sctp_tcb *stcb)
1745 {
1746         /* assume peer doesn't really know how to do asconfs */
1747         stcb->asoc.peer_supports_asconf = 0;
1748         /* XXX we could free the pending queue here */
1749 }
1750
1751 void
1752 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1753     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1754     struct sctp_nets *net, int *abort_no_unlock)
1755 {
1756         struct sctp_association *asoc;
1757         uint32_t serial_num;
1758         uint16_t ack_length;
1759         struct sctp_asconf_paramhdr *aph;
1760         struct sctp_asconf_addr *aa, *aa_next;
1761         uint32_t last_error_id = 0;     /* last error correlation id */
1762         uint32_t id;
1763         struct sctp_asconf_addr *ap;
1764
1765         /* asconf param buffer */
1766         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1767
1768         /* verify minimum length */
1769         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1770                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1771                     "handle_asconf_ack: chunk too small = %xh\n",
1772                     ntohs(cp->ch.chunk_length));
1773                 return;
1774         }
1775         asoc = &stcb->asoc;
1776         serial_num = ntohl(cp->serial_number);
1777
1778         /*
1779          * NOTE: we may want to handle this differently- currently, we will
1780          * abort when we get an ack for the expected serial number + 1 (eg.
1781          * we didn't send it), process an ack normally if it is the expected
1782          * serial number, and re-send the previous ack for *ALL* other
1783          * serial numbers
1784          */
1785
1786         /*
1787          * if the serial number is the next expected, but I didn't send it,
1788          * abort the asoc, since someone probably just hijacked us...
1789          */
1790         if (serial_num == (asoc->asconf_seq_out + 1)) {
1791                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1792                 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, SCTP_SO_NOT_LOCKED);
1793                 *abort_no_unlock = 1;
1794                 return;
1795         }
1796         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1797                 /* got a duplicate/unexpected ASCONF-ACK */
1798                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1799                     serial_num, asoc->asconf_seq_out_acked + 1);
1800                 return;
1801         }
1802         if (serial_num == asoc->asconf_seq_out - 1) {
1803                 /* stop our timer */
1804                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1805                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
1806         }
1807         /* process the ASCONF-ACK contents */
1808         ack_length = ntohs(cp->ch.chunk_length) -
1809             sizeof(struct sctp_asconf_ack_chunk);
1810         offset += sizeof(struct sctp_asconf_ack_chunk);
1811         /* process through all parameters */
1812         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1813                 unsigned int param_length, param_type;
1814
1815                 /* get pointer to next asconf parameter */
1816                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1817                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1818                 if (aph == NULL) {
1819                         /* can't get an asconf paramhdr */
1820                         sctp_asconf_ack_clear(stcb);
1821                         return;
1822                 }
1823                 param_type = ntohs(aph->ph.param_type);
1824                 param_length = ntohs(aph->ph.param_length);
1825                 if (param_length > ack_length) {
1826                         sctp_asconf_ack_clear(stcb);
1827                         return;
1828                 }
1829                 if (param_length < sizeof(struct sctp_paramhdr)) {
1830                         sctp_asconf_ack_clear(stcb);
1831                         return;
1832                 }
1833                 /* get the complete parameter... */
1834                 if (param_length > sizeof(aparam_buf)) {
1835                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1836                             "param length (%u) larger than buffer size!\n", param_length);
1837                         sctp_asconf_ack_clear(stcb);
1838                         return;
1839                 }
1840                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1841                 if (aph == NULL) {
1842                         sctp_asconf_ack_clear(stcb);
1843                         return;
1844                 }
1845                 /* correlation_id is transparent to peer, no ntohl needed */
1846                 id = aph->correlation_id;
1847
1848                 switch (param_type) {
1849                 case SCTP_ERROR_CAUSE_IND:
1850                         last_error_id = id;
1851                         /* find the corresponding asconf param in our queue */
1852                         ap = sctp_asconf_find_param(stcb, id);
1853                         if (ap == NULL) {
1854                                 /* hmm... can't find this in our queue! */
1855                                 break;
1856                         }
1857                         /* process the parameter, failed flag */
1858                         sctp_asconf_process_param_ack(stcb, ap, 0);
1859                         /* process the error response */
1860                         sctp_asconf_process_error(stcb, aph);
1861                         break;
1862                 case SCTP_SUCCESS_REPORT:
1863                         /* find the corresponding asconf param in our queue */
1864                         ap = sctp_asconf_find_param(stcb, id);
1865                         if (ap == NULL) {
1866                                 /* hmm... can't find this in our queue! */
1867                                 break;
1868                         }
1869                         /* process the parameter, success flag */
1870                         sctp_asconf_process_param_ack(stcb, ap, 1);
1871                         break;
1872                 default:
1873                         break;
1874                 }               /* switch */
1875
1876                 /* update remaining ASCONF-ACK message length to process */
1877                 ack_length -= SCTP_SIZE32(param_length);
1878                 if (ack_length <= 0) {
1879                         /* no more data in the mbuf chain */
1880                         break;
1881                 }
1882                 offset += SCTP_SIZE32(param_length);
1883         }                       /* while */
1884
1885         /*
1886          * if there are any "sent" params still on the queue, these are
1887          * implicitly "success", or "failed" (if we got an error back) ...
1888          * so process these appropriately
1889          *
1890          * we assume that the correlation_id's are monotonically increasing
1891          * beginning from 1 and that we don't have *that* many outstanding
1892          * at any given time
1893          */
1894         if (last_error_id == 0)
1895                 last_error_id--;/* set to "max" value */
1896         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1897                 if (aa->sent == 1) {
1898                         /*
1899                          * implicitly successful or failed if correlation_id
1900                          * < last_error_id, then success else, failure
1901                          */
1902                         if (aa->ap.aph.correlation_id < last_error_id)
1903                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1904                         else
1905                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1906                 } else {
1907                         /*
1908                          * since we always process in order (FIFO queue) if
1909                          * we reach one that hasn't been sent, the rest
1910                          * should not have been sent either. so, we're
1911                          * done...
1912                          */
1913                         break;
1914                 }
1915         }
1916
1917         /* update the next sequence number to use */
1918         asoc->asconf_seq_out_acked++;
1919         /* remove the old ASCONF on our outbound queue */
1920         sctp_toss_old_asconf(stcb);
1921         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1922 #ifdef SCTP_TIMER_BASED_ASCONF
1923                 /* we have more params, so restart our timer */
1924                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1925                     stcb, net);
1926 #else
1927                 /* we have more params, so send out more */
1928                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1929 #endif
1930         }
1931 }
1932
1933 #ifdef INET6
1934 static uint32_t
1935 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1936 {
1937         struct sockaddr_in6 *sin6, *net6;
1938         struct sctp_nets *net;
1939
1940         if (sa->sa_family != AF_INET6) {
1941                 /* wrong family */
1942                 return (0);
1943         }
1944         sin6 = (struct sockaddr_in6 *)sa;
1945         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1946                 /* not link local address */
1947                 return (0);
1948         }
1949         /* hunt through our destination nets list for this scope_id */
1950         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1951                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1952                     AF_INET6)
1953                         continue;
1954                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1955                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1956                         continue;
1957                 if (sctp_is_same_scope(sin6, net6)) {
1958                         /* found one */
1959                         return (1);
1960                 }
1961         }
1962         /* didn't find one */
1963         return (0);
1964 }
1965
1966 #endif
1967
1968 /*
1969  * address management functions
1970  */
1971 static void
1972 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1973     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1974 {
1975         int status;
1976
1977
1978         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1979             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1980                 /* subset bound, no ASCONF allowed case, so ignore */
1981                 return;
1982         }
1983         /*
1984          * note: we know this is not the subset bound, no ASCONF case eg.
1985          * this is boundall or subset bound w/ASCONF allowed
1986          */
1987
1988         /* first, make sure it's a good address family */
1989         switch (ifa->address.sa.sa_family) {
1990 #ifdef INET6
1991         case AF_INET6:
1992                 break;
1993 #endif
1994 #ifdef INET
1995         case AF_INET:
1996                 break;
1997 #endif
1998         default:
1999                 return;
2000         }
2001 #ifdef INET6
2002         /* make sure we're "allowed" to add this type of addr */
2003         if (ifa->address.sa.sa_family == AF_INET6) {
2004                 /* invalid if we're not a v6 endpoint */
2005                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
2006                         return;
2007                 /* is the v6 addr really valid ? */
2008                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2009                         return;
2010                 }
2011         }
2012 #endif
2013         /* put this address on the "pending/do not use yet" list */
2014         sctp_add_local_addr_restricted(stcb, ifa);
2015         /*
2016          * check address scope if address is out of scope, don't queue
2017          * anything... note: this would leave the address on both inp and
2018          * asoc lists
2019          */
2020         switch (ifa->address.sa.sa_family) {
2021 #ifdef INET6
2022         case AF_INET6:
2023                 {
2024                         struct sockaddr_in6 *sin6;
2025
2026                         sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2027                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2028                                 /* we skip unspecifed addresses */
2029                                 return;
2030                         }
2031                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2032                                 if (stcb->asoc.local_scope == 0) {
2033                                         return;
2034                                 }
2035                                 /* is it the right link local scope? */
2036                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2037                                         return;
2038                                 }
2039                         }
2040                         if (stcb->asoc.site_scope == 0 &&
2041                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2042                                 return;
2043                         }
2044                         break;
2045                 }
2046 #endif
2047 #ifdef INET
2048         case AF_INET:
2049                 {
2050                         struct sockaddr_in *sin;
2051                         struct in6pcb *inp6;
2052
2053                         inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2054                         /* invalid if we are a v6 only endpoint */
2055                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2056                             SCTP_IPV6_V6ONLY(inp6))
2057                                 return;
2058
2059                         sin = (struct sockaddr_in *)&ifa->address.sa;
2060                         if (sin->sin_addr.s_addr == 0) {
2061                                 /* we skip unspecifed addresses */
2062                                 return;
2063                         }
2064                         if (stcb->asoc.ipv4_local_scope == 0 &&
2065                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2066                                 return;
2067                         }
2068                         break;
2069                 }
2070 #endif
2071         default:
2072                 /* else, not AF_INET or AF_INET6, so skip */
2073                 return;
2074         }
2075
2076         /* queue an asconf for this address add/delete */
2077         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
2078                 /* does the peer do asconf? */
2079                 if (stcb->asoc.peer_supports_asconf) {
2080                         /* queue an asconf for this addr */
2081                         status = sctp_asconf_queue_add(stcb, ifa, type);
2082
2083                         /*
2084                          * if queued ok, and in the open state, send out the
2085                          * ASCONF.  If in the non-open state, these will be
2086                          * sent when the state goes open.
2087                          */
2088                         if (status == 0 &&
2089                             SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2090 #ifdef SCTP_TIMER_BASED_ASCONF
2091                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
2092                                     stcb, stcb->asoc.primary_destination);
2093 #else
2094                                 sctp_send_asconf(stcb, NULL, addr_locked);
2095 #endif
2096                         }
2097                 }
2098         }
2099 }
2100
2101
2102 int
2103 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2104 {
2105         struct sctp_asconf_iterator *asc;
2106         struct sctp_ifa *ifa;
2107         struct sctp_laddr *l;
2108         int cnt_invalid = 0;
2109
2110         asc = (struct sctp_asconf_iterator *)ptr;
2111         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2112                 ifa = l->ifa;
2113                 switch (ifa->address.sa.sa_family) {
2114 #ifdef INET6
2115                 case AF_INET6:
2116                         /* invalid if we're not a v6 endpoint */
2117                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2118                                 cnt_invalid++;
2119                                 if (asc->cnt == cnt_invalid)
2120                                         return (1);
2121                         }
2122                         break;
2123 #endif
2124 #ifdef INET
2125                 case AF_INET:
2126                         {
2127                                 /* invalid if we are a v6 only endpoint */
2128                                 struct in6pcb *inp6;
2129
2130                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2131                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2132                                     SCTP_IPV6_V6ONLY(inp6)) {
2133                                         cnt_invalid++;
2134                                         if (asc->cnt == cnt_invalid)
2135                                                 return (1);
2136                                 }
2137                                 break;
2138                         }
2139 #endif
2140                 default:
2141                         /* invalid address family */
2142                         cnt_invalid++;
2143                         if (asc->cnt == cnt_invalid)
2144                                 return (1);
2145                 }
2146         }
2147         return (0);
2148 }
2149
2150 static int
2151 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2152 {
2153         struct sctp_ifa *ifa;
2154         struct sctp_asconf_iterator *asc;
2155         struct sctp_laddr *laddr, *nladdr, *l;
2156
2157         /* Only for specific case not bound all */
2158         asc = (struct sctp_asconf_iterator *)ptr;
2159         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2160                 ifa = l->ifa;
2161                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2162                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2163                             sctp_nxt_addr) {
2164                                 if (laddr->ifa == ifa) {
2165                                         laddr->action = 0;
2166                                         break;
2167                                 }
2168                         }
2169                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2170                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2171                                 /* remove only after all guys are done */
2172                                 if (laddr->ifa == ifa) {
2173                                         sctp_del_local_addr_ep(inp, ifa);
2174                                 }
2175                         }
2176                 }
2177         }
2178         return (0);
2179 }
2180
2181 void
2182 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2183     void *ptr, uint32_t val SCTP_UNUSED)
2184 {
2185         struct sctp_asconf_iterator *asc;
2186         struct sctp_ifa *ifa;
2187         struct sctp_laddr *l;
2188         int cnt_invalid = 0;
2189         int type, status;
2190         int num_queued = 0;
2191
2192         asc = (struct sctp_asconf_iterator *)ptr;
2193         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2194                 ifa = l->ifa;
2195                 type = l->action;
2196
2197                 /* address's vrf_id must be the vrf_id of the assoc */
2198                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2199                         continue;
2200                 }
2201                 /* Same checks again for assoc */
2202                 switch (ifa->address.sa.sa_family) {
2203 #ifdef INET6
2204                 case AF_INET6:
2205                         {
2206                                 /* invalid if we're not a v6 endpoint */
2207                                 struct sockaddr_in6 *sin6;
2208
2209                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2210                                         cnt_invalid++;
2211                                         if (asc->cnt == cnt_invalid)
2212                                                 return;
2213                                         else
2214                                                 continue;
2215                                 }
2216                                 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2217                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2218                                         /* we skip unspecifed addresses */
2219                                         continue;
2220                                 }
2221                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2222                                         if (stcb->asoc.local_scope == 0) {
2223                                                 continue;
2224                                         }
2225                                         /* is it the right link local scope? */
2226                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2227                                                 continue;
2228                                         }
2229                                 }
2230                                 break;
2231                         }
2232 #endif
2233 #ifdef INET
2234                 case AF_INET:
2235                         {
2236                                 /* invalid if we are a v6 only endpoint */
2237                                 struct in6pcb *inp6;
2238                                 struct sockaddr_in *sin;
2239
2240                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2241                                 /* invalid if we are a v6 only endpoint */
2242                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2243                                     SCTP_IPV6_V6ONLY(inp6))
2244                                         continue;
2245
2246                                 sin = (struct sockaddr_in *)&ifa->address.sa;
2247                                 if (sin->sin_addr.s_addr == 0) {
2248                                         /* we skip unspecifed addresses */
2249                                         continue;
2250                                 }
2251                                 if (stcb->asoc.ipv4_local_scope == 0 &&
2252                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2253                                         continue;
2254                                 }
2255                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2256                                     SCTP_IPV6_V6ONLY(inp6)) {
2257                                         cnt_invalid++;
2258                                         if (asc->cnt == cnt_invalid)
2259                                                 return;
2260                                         else
2261                                                 continue;
2262                                 }
2263                                 break;
2264                         }
2265 #endif
2266                 default:
2267                         /* invalid address family */
2268                         cnt_invalid++;
2269                         if (asc->cnt == cnt_invalid)
2270                                 return;
2271                         else
2272                                 continue;
2273                         break;
2274                 }
2275
2276                 if (type == SCTP_ADD_IP_ADDRESS) {
2277                         /* prevent this address from being used as a source */
2278                         sctp_add_local_addr_restricted(stcb, ifa);
2279                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2280                         struct sctp_nets *net;
2281
2282                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2283                                 sctp_rtentry_t *rt;
2284
2285                                 /* delete this address if cached */
2286                                 if (net->ro._s_addr == ifa) {
2287                                         sctp_free_ifa(net->ro._s_addr);
2288                                         net->ro._s_addr = NULL;
2289                                         net->src_addr_selected = 0;
2290                                         rt = net->ro.ro_rt;
2291                                         if (rt) {
2292                                                 RTFREE(rt);
2293                                                 net->ro.ro_rt = NULL;
2294                                         }
2295                                         /*
2296                                          * Now we deleted our src address,
2297                                          * should we not also now reset the
2298                                          * cwnd/rto to start as if its a new
2299                                          * address?
2300                                          */
2301                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2302                                         net->RTO = 0;
2303
2304                                 }
2305                         }
2306                 } else if (type == SCTP_SET_PRIM_ADDR) {
2307                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2308                                 /* must validate the ifa is in the ep */
2309                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2310                                         continue;
2311                                 }
2312                         } else {
2313                                 /* Need to check scopes for this guy */
2314                                 if (sctp_is_address_in_scope(ifa,
2315                                     stcb->asoc.ipv4_addr_legal,
2316                                     stcb->asoc.ipv6_addr_legal,
2317                                     stcb->asoc.loopback_scope,
2318                                     stcb->asoc.ipv4_local_scope,
2319                                     stcb->asoc.local_scope,
2320                                     stcb->asoc.site_scope, 0) == 0) {
2321                                         continue;
2322                                 }
2323                         }
2324                 }
2325                 /* queue an asconf for this address add/delete */
2326                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2327                     stcb->asoc.peer_supports_asconf) {
2328                         /* queue an asconf for this addr */
2329                         status = sctp_asconf_queue_add(stcb, ifa, type);
2330                         /*
2331                          * if queued ok, and in the open state, update the
2332                          * count of queued params.  If in the non-open
2333                          * state, these get sent when the assoc goes open.
2334                          */
2335                         if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2336                                 if (status >= 0) {
2337                                         num_queued++;
2338                                 }
2339                         }
2340                 }
2341         }
2342         /*
2343          * If we have queued params in the open state, send out an ASCONF.
2344          */
2345         if (num_queued > 0) {
2346                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2347         }
2348 }
2349
2350 void
2351 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2352 {
2353         struct sctp_asconf_iterator *asc;
2354         struct sctp_ifa *ifa;
2355         struct sctp_laddr *l, *nl;
2356
2357         asc = (struct sctp_asconf_iterator *)ptr;
2358         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2359                 ifa = l->ifa;
2360                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2361                         /* Clear the defer use flag */
2362                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2363                 }
2364                 sctp_free_ifa(ifa);
2365                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2366                 SCTP_DECR_LADDR_COUNT();
2367         }
2368         SCTP_FREE(asc, SCTP_M_ASC_IT);
2369 }
2370
2371 /*
2372  * sa is the sockaddr to ask the peer to set primary to.
2373  * returns: 0 = completed, -1 = error
2374  */
2375 int32_t
2376 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2377 {
2378         uint32_t vrf_id;
2379         struct sctp_ifa *ifa;
2380
2381         /* find the ifa for the desired set primary */
2382         vrf_id = stcb->asoc.vrf_id;
2383         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2384         if (ifa == NULL) {
2385                 /* Invalid address */
2386                 return (-1);
2387         }
2388         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2389         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2390                 /* set primary queuing succeeded */
2391                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2392                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2393                     stcb);
2394                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2395                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2396 #ifdef SCTP_TIMER_BASED_ASCONF
2397                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2398                             stcb->sctp_ep, stcb,
2399                             stcb->asoc.primary_destination);
2400 #else
2401                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2402 #endif
2403                 }
2404         } else {
2405                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2406                     stcb);
2407                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2408                 return (-1);
2409         }
2410         return (0);
2411 }
2412
2413 void
2414 sctp_set_primary_ip_address(struct sctp_ifa *ifa)
2415 {
2416         struct sctp_inpcb *inp;
2417
2418         /* go through all our PCB's */
2419         LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
2420                 struct sctp_tcb *stcb;
2421
2422                 /* process for all associations for this endpoint */
2423                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2424                         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2425                         if (!sctp_asconf_queue_add(stcb, ifa,
2426                             SCTP_SET_PRIM_ADDR)) {
2427                                 /* set primary queuing succeeded */
2428                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ",
2429                                     stcb);
2430                                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa);
2431                                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2432 #ifdef SCTP_TIMER_BASED_ASCONF
2433                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2434                                             stcb->sctp_ep, stcb,
2435                                             stcb->asoc.primary_destination);
2436 #else
2437                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2438 #endif
2439                                 }
2440                         }
2441                 }               /* for each stcb */
2442         }                       /* for each inp */
2443 }
2444
2445 int
2446 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2447 {
2448         struct sctp_tmit_chunk *chk, *nchk;
2449         unsigned int offset, asconf_limit;
2450         struct sctp_asconf_chunk *acp;
2451         struct sctp_asconf_paramhdr *aph;
2452         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2453         struct sctp_paramhdr *ph;
2454         int add_cnt, del_cnt;
2455         uint16_t last_param_type;
2456
2457         add_cnt = del_cnt = 0;
2458         last_param_type = 0;
2459         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2460                 if (chk->data == NULL) {
2461                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2462                         continue;
2463                 }
2464                 offset = 0;
2465                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2466                 offset += sizeof(struct sctp_asconf_chunk);
2467                 asconf_limit = ntohs(acp->ch.chunk_length);
2468                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2469                 if (ph == NULL) {
2470                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2471                         continue;
2472                 }
2473                 offset += ntohs(ph->param_length);
2474
2475                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2476                 if (aph == NULL) {
2477                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2478                         continue;
2479                 }
2480                 while (aph != NULL) {
2481                         unsigned int param_length, param_type;
2482
2483                         param_type = ntohs(aph->ph.param_type);
2484                         param_length = ntohs(aph->ph.param_length);
2485                         if (offset + param_length > asconf_limit) {
2486                                 /* parameter goes beyond end of chunk! */
2487                                 break;
2488                         }
2489                         if (param_length > sizeof(aparam_buf)) {
2490                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2491                                 break;
2492                         }
2493                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2494                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2495                                 break;
2496                         }
2497                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2498                         if (aph == NULL) {
2499                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2500                                 break;
2501                         }
2502                         ph = (struct sctp_paramhdr *)(aph + 1);
2503                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2504                                 switch (param_type) {
2505                                 case SCTP_ADD_IP_ADDRESS:
2506                                         add_cnt++;
2507                                         break;
2508                                 case SCTP_DEL_IP_ADDRESS:
2509                                         del_cnt++;
2510                                         break;
2511                                 default:
2512                                         break;
2513                                 }
2514                                 last_param_type = param_type;
2515                         }
2516                         offset += SCTP_SIZE32(param_length);
2517                         if (offset >= asconf_limit) {
2518                                 /* no more data in the mbuf chain */
2519                                 break;
2520                         }
2521                         /* get pointer to next asconf param */
2522                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2523                 }
2524         }
2525
2526         /*
2527          * we want to find the sequences which consist of ADD -> DEL -> ADD
2528          * or DEL -> ADD
2529          */
2530         if (add_cnt > del_cnt ||
2531             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2532                 return (1);
2533         }
2534         return (0);
2535 }
2536
2537 static struct sockaddr *
2538 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2539 {
2540         struct sctp_vrf *vrf = NULL;
2541         struct sctp_ifn *sctp_ifn;
2542         struct sctp_ifa *sctp_ifa;
2543
2544         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2545                 SCTP_IPI_ADDR_RLOCK();
2546         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2547         if (vrf == NULL) {
2548                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2549                         SCTP_IPI_ADDR_RUNLOCK();
2550                 return (NULL);
2551         }
2552         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2553                 if (stcb->asoc.loopback_scope == 0 &&
2554                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2555                         /* Skip if loopback_scope not set */
2556                         continue;
2557                 }
2558                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2559                         switch (sctp_ifa->address.sa.sa_family) {
2560 #ifdef INET
2561                         case AF_INET:
2562                                 if (stcb->asoc.ipv4_addr_legal) {
2563                                         struct sockaddr_in *sin;
2564
2565                                         sin = (struct sockaddr_in *)&sctp_ifa->address.sa;
2566                                         if (sin->sin_addr.s_addr == 0) {
2567                                                 /* skip unspecifed addresses */
2568                                                 continue;
2569                                         }
2570                                         if (stcb->asoc.ipv4_local_scope == 0 &&
2571                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2572                                                 continue;
2573
2574                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2575                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2576                                                 continue;
2577                                         /*
2578                                          * found a valid local v4 address to
2579                                          * use
2580                                          */
2581                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2582                                                 SCTP_IPI_ADDR_RUNLOCK();
2583                                         return (&sctp_ifa->address.sa);
2584                                 }
2585                                 break;
2586 #endif
2587 #ifdef INET6
2588                         case AF_INET6:
2589                                 if (stcb->asoc.ipv6_addr_legal) {
2590                                         struct sockaddr_in6 *sin6;
2591
2592                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2593                                                 continue;
2594                                         }
2595                                         sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa;
2596                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2597                                                 /*
2598                                                  * we skip unspecifed
2599                                                  * addresses
2600                                                  */
2601                                                 continue;
2602                                         }
2603                                         if (stcb->asoc.local_scope == 0 &&
2604                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2605                                                 continue;
2606                                         if (stcb->asoc.site_scope == 0 &&
2607                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2608                                                 continue;
2609
2610                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2611                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2612                                                 continue;
2613                                         /*
2614                                          * found a valid local v6 address to
2615                                          * use
2616                                          */
2617                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2618                                                 SCTP_IPI_ADDR_RUNLOCK();
2619                                         return (&sctp_ifa->address.sa);
2620                                 }
2621                                 break;
2622 #endif
2623                         default:
2624                                 break;
2625                         }
2626                 }
2627         }
2628         /* no valid addresses found */
2629         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2630                 SCTP_IPI_ADDR_RUNLOCK();
2631         return (NULL);
2632 }
2633
2634 static struct sockaddr *
2635 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2636 {
2637         struct sctp_laddr *laddr;
2638
2639         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2640                 if (laddr->ifa == NULL) {
2641                         continue;
2642                 }
2643                 /* is the address restricted ? */
2644                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2645                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2646                         continue;
2647
2648                 /* found a valid local address to use */
2649                 return (&laddr->ifa->address.sa);
2650         }
2651         /* no valid addresses found */
2652         return (NULL);
2653 }
2654
2655 /*
2656  * builds an ASCONF chunk from queued ASCONF params.
2657  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2658  */
2659 struct mbuf *
2660 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2661 {
2662         struct mbuf *m_asconf, *m_asconf_chk;
2663         struct sctp_asconf_addr *aa;
2664         struct sctp_asconf_chunk *acp;
2665         struct sctp_asconf_paramhdr *aph;
2666         struct sctp_asconf_addr_param *aap;
2667         uint32_t p_length;
2668         uint32_t correlation_id = 1;    /* 0 is reserved... */
2669         caddr_t ptr, lookup_ptr;
2670         uint8_t lookup_used = 0;
2671
2672         /* are there any asconf params to send? */
2673         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2674                 if (aa->sent == 0)
2675                         break;
2676         }
2677         if (aa == NULL)
2678                 return (NULL);
2679
2680         /*
2681          * get a chunk header mbuf and a cluster for the asconf params since
2682          * it's simpler to fill in the asconf chunk header lookup address on
2683          * the fly
2684          */
2685         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA);
2686         if (m_asconf_chk == NULL) {
2687                 /* no mbuf's */
2688                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2689                     "compose_asconf: couldn't get chunk mbuf!\n");
2690                 return (NULL);
2691         }
2692         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
2693         if (m_asconf == NULL) {
2694                 /* no mbuf's */
2695                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2696                     "compose_asconf: couldn't get mbuf!\n");
2697                 sctp_m_freem(m_asconf_chk);
2698                 return (NULL);
2699         }
2700         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2701         SCTP_BUF_LEN(m_asconf) = 0;
2702         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2703         bzero(acp, sizeof(struct sctp_asconf_chunk));
2704         /* save pointers to lookup address and asconf params */
2705         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2706         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2707
2708         /* fill in chunk header info */
2709         acp->ch.chunk_type = SCTP_ASCONF;
2710         acp->ch.chunk_flags = 0;
2711         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2712         stcb->asoc.asconf_seq_out++;
2713
2714         /* add parameters... up to smallest MTU allowed */
2715         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2716                 if (aa->sent)
2717                         continue;
2718                 /* get the parameter length */
2719                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2720                 /* will it fit in current chunk? */
2721                 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) {
2722                         /* won't fit, so we're done with this chunk */
2723                         break;
2724                 }
2725                 /* assign (and store) a correlation id */
2726                 aa->ap.aph.correlation_id = correlation_id++;
2727
2728                 /*
2729                  * fill in address if we're doing a delete this is a simple
2730                  * way for us to fill in the correlation address, which
2731                  * should only be used by the peer if we're deleting our
2732                  * source address and adding a new address (e.g. renumbering
2733                  * case)
2734                  */
2735                 if (lookup_used == 0 &&
2736                     (aa->special_del == 0) &&
2737                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2738                         struct sctp_ipv6addr_param *lookup;
2739                         uint16_t p_size, addr_size;
2740
2741                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2742                         lookup->ph.param_type =
2743                             htons(aa->ap.addrp.ph.param_type);
2744                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2745                                 /* copy IPv6 address */
2746                                 p_size = sizeof(struct sctp_ipv6addr_param);
2747                                 addr_size = sizeof(struct in6_addr);
2748                         } else {
2749                                 /* copy IPv4 address */
2750                                 p_size = sizeof(struct sctp_ipv4addr_param);
2751                                 addr_size = sizeof(struct in_addr);
2752                         }
2753                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2754                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2755                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2756                         lookup_used = 1;
2757                 }
2758                 /* copy into current space */
2759                 memcpy(ptr, &aa->ap, p_length);
2760
2761                 /* network elements and update lengths */
2762                 aph = (struct sctp_asconf_paramhdr *)ptr;
2763                 aap = (struct sctp_asconf_addr_param *)ptr;
2764                 /* correlation_id is transparent to peer, no htonl needed */
2765                 aph->ph.param_type = htons(aph->ph.param_type);
2766                 aph->ph.param_length = htons(aph->ph.param_length);
2767                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2768                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2769
2770                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2771                 ptr += SCTP_SIZE32(p_length);
2772
2773                 /*
2774                  * these params are removed off the pending list upon
2775                  * getting an ASCONF-ACK back from the peer, just set flag
2776                  */
2777                 aa->sent = 1;
2778         }
2779         /* check to see if the lookup addr has been populated yet */
2780         if (lookup_used == 0) {
2781                 /* NOTE: if the address param is optional, can skip this... */
2782                 /* add any valid (existing) address... */
2783                 struct sctp_ipv6addr_param *lookup;
2784                 uint16_t p_size, addr_size;
2785                 struct sockaddr *found_addr;
2786                 caddr_t addr_ptr;
2787
2788                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2789                         found_addr = sctp_find_valid_localaddr(stcb,
2790                             addr_locked);
2791                 else
2792                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2793
2794                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2795                 if (found_addr != NULL) {
2796                         switch (found_addr->sa_family) {
2797 #ifdef INET6
2798                         case AF_INET6:
2799                                 /* copy IPv6 address */
2800                                 lookup->ph.param_type =
2801                                     htons(SCTP_IPV6_ADDRESS);
2802                                 p_size = sizeof(struct sctp_ipv6addr_param);
2803                                 addr_size = sizeof(struct in6_addr);
2804                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2805                                     found_addr)->sin6_addr;
2806                                 break;
2807 #endif
2808 #ifdef INET
2809                         case AF_INET:
2810                                 /* copy IPv4 address */
2811                                 lookup->ph.param_type =
2812                                     htons(SCTP_IPV4_ADDRESS);
2813                                 p_size = sizeof(struct sctp_ipv4addr_param);
2814                                 addr_size = sizeof(struct in_addr);
2815                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2816                                     found_addr)->sin_addr;
2817                                 break;
2818 #endif
2819                         default:
2820                                 p_size = 0;
2821                                 addr_size = 0;
2822                                 addr_ptr = NULL;
2823                                 break;
2824                         }
2825                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2826                         memcpy(lookup->addr, addr_ptr, addr_size);
2827                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2828                 } else {
2829                         /* uh oh... don't have any address?? */
2830                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2831                             "compose_asconf: no lookup addr!\n");
2832                         /* XXX for now, we send a IPv4 address of 0.0.0.0 */
2833                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2834                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2835                         bzero(lookup->addr, sizeof(struct in_addr));
2836                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2837                 }
2838         }
2839         /* chain it all together */
2840         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2841         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2842         acp->ch.chunk_length = ntohs(*retlen);
2843
2844         return (m_asconf_chk);
2845 }
2846
2847 /*
2848  * section to handle address changes before an association is up eg. changes
2849  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2850  */
2851
2852 /*
2853  * processes the (local) addresses in the INIT-ACK chunk
2854  */
2855 static void
2856 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2857     unsigned int offset, unsigned int length)
2858 {
2859         struct sctp_paramhdr tmp_param, *ph;
2860         uint16_t plen, ptype;
2861         struct sctp_ifa *sctp_ifa;
2862         struct sctp_ipv6addr_param addr_store;
2863
2864 #ifdef INET6
2865         struct sockaddr_in6 sin6;
2866
2867 #endif
2868 #ifdef INET
2869         struct sockaddr_in sin;
2870
2871 #endif
2872         struct sockaddr *sa;
2873         uint32_t vrf_id;
2874
2875         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2876         if (stcb == NULL)       /* Un-needed check for SA */
2877                 return;
2878
2879         /* convert to upper bound */
2880         length += offset;
2881
2882         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2883                 return;
2884         }
2885         /* init the addresses */
2886 #ifdef INET6
2887         bzero(&sin6, sizeof(sin6));
2888         sin6.sin6_family = AF_INET6;
2889         sin6.sin6_len = sizeof(sin6);
2890         sin6.sin6_port = stcb->rport;
2891 #endif
2892
2893 #ifdef INET
2894         bzero(&sin, sizeof(sin));
2895         sin.sin_family = AF_INET;
2896         sin.sin_len = sizeof(sin);
2897         sin.sin_port = stcb->rport;
2898 #endif
2899
2900         /* go through the addresses in the init-ack */
2901         ph = (struct sctp_paramhdr *)
2902             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2903             (uint8_t *) & tmp_param);
2904         while (ph != NULL) {
2905                 ptype = ntohs(ph->param_type);
2906                 plen = ntohs(ph->param_length);
2907                 switch (ptype) {
2908 #ifdef INET6
2909                 case SCTP_IPV6_ADDRESS:
2910                         {
2911                                 struct sctp_ipv6addr_param *a6p;
2912
2913                                 /* get the entire IPv6 address param */
2914                                 a6p = (struct sctp_ipv6addr_param *)
2915                                     sctp_m_getptr(m, offset,
2916                                     sizeof(struct sctp_ipv6addr_param),
2917                                     (uint8_t *) & addr_store);
2918                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2919                                     a6p == NULL) {
2920                                         return;
2921                                 }
2922                                 memcpy(&sin6.sin6_addr, a6p->addr,
2923                                     sizeof(struct in6_addr));
2924                                 sa = (struct sockaddr *)&sin6;
2925                                 break;
2926                         }
2927 #endif
2928 #ifdef INET
2929                 case SCTP_IPV4_ADDRESS:
2930                         {
2931                                 struct sctp_ipv4addr_param *a4p;
2932
2933                                 /* get the entire IPv4 address param */
2934                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2935                                     sizeof(struct sctp_ipv4addr_param),
2936                                     (uint8_t *) & addr_store);
2937                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2938                                     a4p == NULL) {
2939                                         return;
2940                                 }
2941                                 sin.sin_addr.s_addr = a4p->addr;
2942                                 sa = (struct sockaddr *)&sin;
2943                                 break;
2944                         }
2945 #endif
2946                 default:
2947                         goto next_addr;
2948                 }
2949
2950                 /* see if this address really (still) exists */
2951                 if (stcb) {
2952                         vrf_id = stcb->asoc.vrf_id;
2953                 } else {
2954                         vrf_id = SCTP_DEFAULT_VRFID;
2955                 }
2956                 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id,
2957                     SCTP_ADDR_NOT_LOCKED);
2958                 if (sctp_ifa == NULL) {
2959                         /* address doesn't exist anymore */
2960                         int status;
2961
2962                         /* are ASCONFs allowed ? */
2963                         if ((sctp_is_feature_on(stcb->sctp_ep,
2964                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2965                             stcb->asoc.peer_supports_asconf) {
2966                                 /* queue an ASCONF DEL_IP_ADDRESS */
2967                                 status = sctp_asconf_queue_sa_delete(stcb, sa);
2968                                 /*
2969                                  * if queued ok, and in correct state, send
2970                                  * out the ASCONF.
2971                                  */
2972                                 if (status == 0 &&
2973                                     SCTP_GET_STATE(&stcb->asoc) ==
2974                                     SCTP_STATE_OPEN) {
2975 #ifdef SCTP_TIMER_BASED_ASCONF
2976                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2977                                             stcb->sctp_ep, stcb,
2978                                             stcb->asoc.primary_destination);
2979 #else
2980                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2981 #endif
2982                                 }
2983                         }
2984                 }
2985 next_addr:
2986                 /*
2987                  * Sanity check:  Make sure the length isn't 0, otherwise
2988                  * we'll be stuck in this loop for a long time...
2989                  */
2990                 if (SCTP_SIZE32(plen) == 0) {
2991                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2992                             plen, ptype);
2993                         return;
2994                 }
2995                 /* get next parameter */
2996                 offset += SCTP_SIZE32(plen);
2997                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2998                         return;
2999                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
3000                     sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
3001         }                       /* while */
3002 }
3003
3004 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
3005 /*
3006  * checks to see if a specific address is in the initack address list returns
3007  * 1 if found, 0 if not
3008  */
3009 static uint32_t
3010 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
3011 {
3012         struct sctp_paramhdr tmp_param, *ph;
3013         uint16_t plen, ptype;
3014         struct sctp_ipv6addr_param addr_store;
3015
3016 #ifdef INET
3017         struct sockaddr_in *sin;
3018         struct sctp_ipv4addr_param *a4p;
3019
3020 #endif
3021 #ifdef INET6
3022         struct sockaddr_in6 *sin6;
3023         struct sctp_ipv6addr_param *a6p;
3024         struct sockaddr_in6 sin6_tmp;
3025
3026 #endif
3027
3028         switch (sa->sa_family) {
3029 #ifdef INET
3030         case AF_INET:
3031                 break;
3032 #endif
3033 #ifdef INET6
3034         case AF_INET6:
3035                 break;
3036 #endif
3037         default:
3038                 return (0);
3039         }
3040
3041         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
3042         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
3043         /* convert to upper bound */
3044         length += offset;
3045
3046         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
3047                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3048                     "find_initack_addr: invalid offset?\n");
3049                 return (0);
3050         }
3051         /* go through the addresses in the init-ack */
3052         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
3053             sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
3054         while (ph != NULL) {
3055                 ptype = ntohs(ph->param_type);
3056                 plen = ntohs(ph->param_length);
3057                 switch (ptype) {
3058 #ifdef INET6
3059                 case SCTP_IPV6_ADDRESS:
3060                         if (sa->sa_family == AF_INET6) {
3061                                 /* get the entire IPv6 address param */
3062                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
3063                                         break;
3064                                 }
3065                                 /* get the entire IPv6 address param */
3066                                 a6p = (struct sctp_ipv6addr_param *)
3067                                     sctp_m_getptr(m, offset,
3068                                     sizeof(struct sctp_ipv6addr_param),
3069                                     (uint8_t *) & addr_store);
3070                                 if (a6p == NULL) {
3071                                         return (0);
3072                                 }
3073                                 sin6 = (struct sockaddr_in6 *)sa;
3074                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
3075                                         /* create a copy and clear scope */
3076                                         memcpy(&sin6_tmp, sin6,
3077                                             sizeof(struct sockaddr_in6));
3078                                         sin6 = &sin6_tmp;
3079                                         in6_clearscope(&sin6->sin6_addr);
3080                                 }
3081                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
3082                                     sizeof(struct in6_addr)) == 0) {
3083                                         /* found it */
3084                                         return (1);
3085                                 }
3086                         }
3087                         break;
3088 #endif                          /* INET6 */
3089 #ifdef INET
3090                 case SCTP_IPV4_ADDRESS:
3091                         if (sa->sa_family == AF_INET) {
3092                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
3093                                         break;
3094                                 }
3095                                 /* get the entire IPv4 address param */
3096                                 a4p = (struct sctp_ipv4addr_param *)
3097                                     sctp_m_getptr(m, offset,
3098                                     sizeof(struct sctp_ipv4addr_param),
3099                                     (uint8_t *) & addr_store);
3100                                 if (a4p == NULL) {
3101                                         return (0);
3102                                 }
3103                                 sin = (struct sockaddr_in *)sa;
3104                                 if (sin->sin_addr.s_addr == a4p->addr) {
3105                                         /* found it */
3106                                         return (1);
3107                                 }
3108                         }
3109                         break;
3110 #endif
3111                 default:
3112                         break;
3113                 }
3114                 /* get next parameter */
3115                 offset += SCTP_SIZE32(plen);
3116                 if (offset + sizeof(struct sctp_paramhdr) > length) {
3117                         return (0);
3118                 }
3119                 ph = (struct sctp_paramhdr *)
3120                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
3121                     (uint8_t *) & tmp_param);
3122         }                       /* while */
3123         /* not found! */
3124         return (0);
3125 }
3126
3127 /*
3128  * makes sure that the current endpoint local addr list is consistent with
3129  * the new association (eg. subset bound, asconf allowed) adds addresses as
3130  * necessary
3131  */
3132 static void
3133 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3134     int length, struct sockaddr *init_addr)
3135 {
3136         struct sctp_laddr *laddr;
3137
3138         /* go through the endpoint list */
3139         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3140                 /* be paranoid and validate the laddr */
3141                 if (laddr->ifa == NULL) {
3142                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3143                             "check_addr_list_ep: laddr->ifa is NULL");
3144                         continue;
3145                 }
3146                 if (laddr->ifa == NULL) {
3147                         SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3148                         continue;
3149                 }
3150                 /* do i have it implicitly? */
3151                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3152                         continue;
3153                 }
3154                 /* check to see if in the init-ack */
3155                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3156                         /* try to add it */
3157                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3158                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3159                 }
3160         }
3161 }
3162
3163 /*
3164  * makes sure that the current kernel address list is consistent with the new
3165  * association (with all addrs bound) adds addresses as necessary
3166  */
3167 static void
3168 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3169     int length, struct sockaddr *init_addr,
3170     uint16_t local_scope, uint16_t site_scope,
3171     uint16_t ipv4_scope, uint16_t loopback_scope)
3172 {
3173         struct sctp_vrf *vrf = NULL;
3174         struct sctp_ifn *sctp_ifn;
3175         struct sctp_ifa *sctp_ifa;
3176         uint32_t vrf_id;
3177
3178 #ifdef INET
3179         struct sockaddr_in *sin;
3180
3181 #endif
3182 #ifdef INET6
3183         struct sockaddr_in6 *sin6;
3184
3185 #endif
3186
3187         if (stcb) {
3188                 vrf_id = stcb->asoc.vrf_id;
3189         } else {
3190                 return;
3191         }
3192         SCTP_IPI_ADDR_RLOCK();
3193         vrf = sctp_find_vrf(vrf_id);
3194         if (vrf == NULL) {
3195                 SCTP_IPI_ADDR_RUNLOCK();
3196                 return;
3197         }
3198         /* go through all our known interfaces */
3199         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3200                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3201                         /* skip loopback interface */
3202                         continue;
3203                 }
3204                 /* go through each interface address */
3205                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3206                         /* do i have it implicitly? */
3207                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3208                                 continue;
3209                         }
3210                         switch (sctp_ifa->address.sa.sa_family) {
3211 #ifdef INET
3212                         case AF_INET:
3213                                 sin = (struct sockaddr_in *)&sctp_ifa->address.sin;
3214                                 if ((ipv4_scope == 0) &&
3215                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3216                                         /* private address not in scope */
3217                                         continue;
3218                                 }
3219                                 break;
3220 #endif
3221 #ifdef INET6
3222                         case AF_INET6:
3223                                 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sin6;
3224                                 if ((local_scope == 0) &&
3225                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3226                                         continue;
3227                                 }
3228                                 if ((site_scope == 0) &&
3229                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3230                                         continue;
3231                                 }
3232                                 break;
3233 #endif
3234                         default:
3235                                 break;
3236                         }
3237                         /* check to see if in the init-ack */
3238                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3239                                 /* try to add it */
3240                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3241                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3242                                     SCTP_ADDR_LOCKED);
3243                         }
3244                 }               /* end foreach ifa */
3245         }                       /* end foreach ifn */
3246         SCTP_IPI_ADDR_RUNLOCK();
3247 }
3248
3249 /*
3250  * validates an init-ack chunk (from a cookie-echo) with current addresses
3251  * adds addresses from the init-ack into our local address list, if needed
3252  * queues asconf adds/deletes addresses as needed and makes appropriate list
3253  * changes for source address selection m, offset: points to the start of the
3254  * address list in an init-ack chunk length: total length of the address
3255  * params only init_addr: address where my INIT-ACK was sent from
3256  */
3257 void
3258 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3259     int length, struct sockaddr *init_addr,
3260     uint16_t local_scope, uint16_t site_scope,
3261     uint16_t ipv4_scope, uint16_t loopback_scope)
3262 {
3263         /* process the local addresses in the initack */
3264         sctp_process_initack_addresses(stcb, m, offset, length);
3265
3266         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3267                 /* bound all case */
3268                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3269                     local_scope, site_scope, ipv4_scope, loopback_scope);
3270         } else {
3271                 /* subset bound case */
3272                 if (sctp_is_feature_on(stcb->sctp_ep,
3273                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3274                         /* asconf's allowed */
3275                         sctp_check_address_list_ep(stcb, m, offset, length,
3276                             init_addr);
3277                 }
3278                 /* else, no asconfs allowed, so what we sent is what we get */
3279         }
3280 }
3281
3282 /*
3283  * sctp_bindx() support
3284  */
3285 uint32_t
3286 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3287     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3288 {
3289         struct sctp_ifa *ifa;
3290         struct sctp_laddr *laddr, *nladdr;
3291
3292         if (sa->sa_len == 0) {
3293                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3294                 return (EINVAL);
3295         }
3296         if (sctp_ifap) {
3297                 ifa = sctp_ifap;
3298         } else if (type == SCTP_ADD_IP_ADDRESS) {
3299                 /* For an add the address MUST be on the system */
3300                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3301         } else if (type == SCTP_DEL_IP_ADDRESS) {
3302                 /* For a delete we need to find it in the inp */
3303                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3304         } else {
3305                 ifa = NULL;
3306         }
3307         if (ifa != NULL) {
3308                 if (type == SCTP_ADD_IP_ADDRESS) {
3309                         sctp_add_local_addr_ep(inp, ifa, type);
3310                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3311                         if (inp->laddr_count < 2) {
3312                                 /* can't delete the last local address */
3313                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3314                                 return (EINVAL);
3315                         }
3316                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3317                             sctp_nxt_addr) {
3318                                 if (ifa == laddr->ifa) {
3319                                         /* Mark in the delete */
3320                                         laddr->action = type;
3321                                 }
3322                         }
3323                 }
3324                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3325                         /*
3326                          * There is no need to start the iterator if the inp
3327                          * has no associations.
3328                          */
3329                         if (type == SCTP_DEL_IP_ADDRESS) {
3330                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3331                                         if (laddr->ifa == ifa) {
3332                                                 sctp_del_local_addr_ep(inp, ifa);
3333                                         }
3334                                 }
3335                         }
3336                 } else {
3337                         struct sctp_asconf_iterator *asc;
3338                         struct sctp_laddr *wi;
3339
3340                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3341                             sizeof(struct sctp_asconf_iterator),
3342                             SCTP_M_ASC_IT);
3343                         if (asc == NULL) {
3344                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3345                                 return (ENOMEM);
3346                         }
3347                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3348                         if (wi == NULL) {
3349                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3350                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3351                                 return (ENOMEM);
3352                         }
3353                         LIST_INIT(&asc->list_of_work);
3354                         asc->cnt = 1;
3355                         SCTP_INCR_LADDR_COUNT();
3356                         wi->ifa = ifa;
3357                         wi->action = type;
3358                         atomic_add_int(&ifa->refcount, 1);
3359                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3360                         (void)sctp_initiate_iterator(sctp_asconf_iterator_ep,
3361                             sctp_asconf_iterator_stcb,
3362                             sctp_asconf_iterator_ep_end,
3363                             SCTP_PCB_ANY_FLAGS,
3364                             SCTP_PCB_ANY_FEATURES,
3365                             SCTP_ASOC_ANY_STATE,
3366                             (void *)asc, 0,
3367                             sctp_asconf_iterator_end, inp, 0);
3368                 }
3369                 return (0);
3370         } else {
3371                 /* invalid address! */
3372                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3373                 return (EADDRNOTAVAIL);
3374         }
3375 }
3376
3377 void
3378 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3379     struct sctp_nets *net)
3380 {
3381         struct sctp_asconf_addr *aa;
3382         struct sctp_ifa *sctp_ifap;
3383         struct sctp_asconf_tag_param *vtag;
3384
3385 #ifdef INET
3386         struct sockaddr_in *to;
3387
3388 #endif
3389 #ifdef INET6
3390         struct sockaddr_in6 *to6;
3391
3392 #endif
3393         if (net == NULL) {
3394                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3395                 return;
3396         }
3397         if (stcb == NULL) {
3398                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3399                 return;
3400         }
3401         /*
3402          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3403          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3404          */
3405         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3406             SCTP_M_ASC_ADDR);
3407         if (aa == NULL) {
3408                 /* didn't get memory */
3409                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3410                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3411                 return;
3412         }
3413         aa->special_del = 0;
3414         /* fill in asconf address parameter fields */
3415         /* top level elements are "networked" during send */
3416         aa->ifa = NULL;
3417         aa->sent = 0;           /* clear sent flag */
3418         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3419         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3420         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3421         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3422         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3423         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3424
3425         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3426             SCTP_M_ASC_ADDR);
3427         if (aa == NULL) {
3428                 /* didn't get memory */
3429                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3430                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3431                 return;
3432         }
3433         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3434         /* fill in asconf address parameter fields */
3435         /* ADD(0.0.0.0) */
3436         switch (net->ro._l_addr.sa.sa_family) {
3437 #ifdef INET
3438         case AF_INET:
3439                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3440                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3441                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3442                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3443                 /* No need to add an address, we are using 0.0.0.0 */
3444                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3445                 break;
3446 #endif
3447 #ifdef INET6
3448         case AF_INET6:
3449                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3450                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3451                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3452                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3453                 /* No need to add an address, we are using 0.0.0.0 */
3454                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3455                 break;
3456 #endif
3457         }
3458         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3459             SCTP_M_ASC_ADDR);
3460         if (aa == NULL) {
3461                 /* didn't get memory */
3462                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3463                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3464                 return;
3465         }
3466         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3467         /* fill in asconf address parameter fields */
3468         /* ADD(0.0.0.0) */
3469         switch (net->ro._l_addr.sa.sa_family) {
3470 #ifdef INET
3471         case AF_INET:
3472                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3473                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3474                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3475                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3476                 /* No need to add an address, we are using 0.0.0.0 */
3477                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3478                 break;
3479 #endif
3480 #ifdef INET6
3481         case AF_INET6:
3482                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3483                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3484                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3485                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3486                 /* No need to add an address, we are using 0.0.0.0 */
3487                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3488                 break;
3489 #endif
3490         }
3491         /* Now we must hunt the addresses and add all global addresses */
3492         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3493                 struct sctp_vrf *vrf = NULL;
3494                 struct sctp_ifn *sctp_ifnp;
3495                 uint32_t vrf_id;
3496
3497                 vrf_id = stcb->sctp_ep->def_vrf_id;
3498                 vrf = sctp_find_vrf(vrf_id);
3499                 if (vrf == NULL) {
3500                         goto skip_rest;
3501                 }
3502                 SCTP_IPI_ADDR_RLOCK();
3503                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3504                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3505                                 switch (sctp_ifap->address.sa.sa_family) {
3506 #ifdef INET
3507                                 case AF_INET:
3508                                         to = &sctp_ifap->address.sin;
3509                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3510                                                 continue;
3511                                         }
3512                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3513                                                 continue;
3514                                         }
3515                                         break;
3516 #endif
3517 #ifdef INET6
3518                                 case AF_INET6:
3519                                         to6 = &sctp_ifap->address.sin6;
3520                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3521                                                 continue;
3522                                         }
3523                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3524                                                 continue;
3525                                         }
3526                                         break;
3527 #endif
3528                                 default:
3529                                         continue;
3530                                 }
3531                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3532                         }
3533                 }
3534                 SCTP_IPI_ADDR_RUNLOCK();
3535         } else {
3536                 struct sctp_laddr *laddr;
3537
3538                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3539                         if (laddr->ifa == NULL) {
3540                                 continue;
3541                         }
3542                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3543                                 /*
3544                                  * Address being deleted by the system, dont
3545                                  * list.
3546                                  */
3547                                 continue;
3548                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3549                                 /*
3550                                  * Address being deleted on this ep don't
3551                                  * list.
3552                                  */
3553                                 continue;
3554                         }
3555                         sctp_ifap = laddr->ifa;
3556                         switch (sctp_ifap->address.sa.sa_family) {
3557 #ifdef INET
3558                         case AF_INET:
3559                                 to = &sctp_ifap->address.sin;
3560                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3561                                         continue;
3562                                 }
3563                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3564                                         continue;
3565                                 }
3566                                 break;
3567 #endif
3568 #ifdef INET6
3569                         case AF_INET6:
3570                                 to6 = &sctp_ifap->address.sin6;
3571                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3572                                         continue;
3573                                 }
3574                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3575                                         continue;
3576                                 }
3577                                 break;
3578 #endif
3579                         default:
3580                                 continue;
3581                         }
3582                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3583                 }
3584         }
3585 skip_rest:
3586         /* Now we must send the asconf into the queue */
3587         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3588 }