sys/netinet/sctp_asconf.c

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