sys/netinet/sctp_asconf.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <netinet/sctp_var.h>
  40 #include <netinet/sctp_sysctl.h>
  41 #include <netinet/sctp_pcb.h>
  42 #include <netinet/sctp_header.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp_output.h>
  45 #include <netinet/sctp_asconf.h>
  46 #include <netinet/sctp_timer.h>
  47
  48 /*
  49  * debug flags:
  50  * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
  51  * SCTP_DEBUG_ASCONF2: detailed info
  52  */
  53
  54
  55 /*
  56  * RFC 5061
  57  *
  58  * An ASCONF parameter queue exists per asoc which holds the pending address
  59  * operations.  Lists are updated upon receipt of ASCONF-ACK.
  60  *
  61  * A restricted_addrs list exists per assoc to hold local addresses that are
  62  * not (yet) usable by the assoc as a source address.  These addresses are
  63  * either pending an ASCONF operation (and exist on the ASCONF parameter
  64  * queue), or they are permanently restricted (the peer has returned an
  65  * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
  66  *
  67  * Deleted addresses are always immediately removed from the lists as they will
  68  * (shortly) no longer exist in the kernel.  We send ASCONFs as a courtesy,
  69  * only if allowed.
  70  */
  71
  72 /*
  73  * ASCONF parameter processing.
  74  * response_required: set if a reply is required (eg. SUCCESS_REPORT).
  75  * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
  76  * FIX: allocating this many mbufs on the fly is pretty inefficient...
  77  */
  78 static struct mbuf *
  79 sctp_asconf_success_response(uint32_t id)
  80 {
  81         struct mbuf *m_reply = NULL;
  82         struct sctp_asconf_paramhdr *aph;
  83
  84         m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
  85             0, M_NOWAIT, 1, MT_DATA);
  86         if (m_reply == NULL) {
  87                 SCTPDBG(SCTP_DEBUG_ASCONF1,
  88                     "asconf_success_response: couldn't get mbuf!\n");
  89                 return (NULL);
  90         }
  91         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
  92         aph->correlation_id = id;
  93         aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
  94         aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
  95         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
  96         aph->ph.param_length = htons(aph->ph.param_length);
  97
  98         return (m_reply);
  99 }
 100
 101 static struct mbuf *
 102 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv,
 103     uint16_t tlv_length)
 104 {
 105         struct mbuf *m_reply = NULL;
 106         struct sctp_asconf_paramhdr *aph;
 107         struct sctp_error_cause *error;
 108         uint8_t *tlv;
 109
 110         m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) +
 111             tlv_length +
 112             sizeof(struct sctp_error_cause)),
 113             0, M_NOWAIT, 1, MT_DATA);
 114         if (m_reply == NULL) {
 115                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 116                     "asconf_error_response: couldn't get mbuf!\n");
 117                 return (NULL);
 118         }
 119         aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
 120         error = (struct sctp_error_cause *)(aph + 1);
 121
 122         aph->correlation_id = id;
 123         aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
 124         error->code = htons(cause);
 125         error->length = tlv_length + sizeof(struct sctp_error_cause);
 126         aph->ph.param_length = error->length +
 127             sizeof(struct sctp_asconf_paramhdr);
 128
 129         if (aph->ph.param_length > MLEN) {
 130                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 131                     "asconf_error_response: tlv_length (%xh) too big\n",
 132                     tlv_length);
 133                 sctp_m_freem(m_reply);  /* discard */
 134                 return (NULL);
 135         }
 136         if (error_tlv != NULL) {
 137                 tlv = (uint8_t *)(error + 1);
 138                 memcpy(tlv, error_tlv, tlv_length);
 139         }
 140         SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
 141         error->length = htons(error->length);
 142         aph->ph.param_length = htons(aph->ph.param_length);
 143
 144         return (m_reply);
 145 }
 146
 147 static struct mbuf *
 148 sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph,
 149     struct sctp_tcb *stcb, int send_hb, int response_required)
 150 {
 151         struct sctp_nets *net;
 152         struct mbuf *m_reply = NULL;
 153         union sctp_sockstore store;
 154         struct sctp_paramhdr *ph;
 155         uint16_t param_type, aparam_length;
 156 #if defined(INET) || defined(INET6)
 157         uint16_t param_length;
 158 #endif
 159         struct sockaddr *sa;
 160         int zero_address = 0;
 161         int bad_address = 0;
 162 #ifdef INET
 163         struct sockaddr_in *sin;
 164         struct sctp_ipv4addr_param *v4addr;
 165 #endif
 166 #ifdef INET6
 167         struct sockaddr_in6 *sin6;
 168         struct sctp_ipv6addr_param *v6addr;
 169 #endif
 170
 171         aparam_length = ntohs(aph->ph.param_length);
 172         ph = (struct sctp_paramhdr *)(aph + 1);
 173         param_type = ntohs(ph->param_type);
 174 #if defined(INET) || defined(INET6)
 175         param_length = ntohs(ph->param_length);
 176 #endif
 177         sa = &store.sa;
 178         switch (param_type) {
 179 #ifdef INET
 180         case SCTP_IPV4_ADDRESS:
 181                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 182                         /* invalid param size */
 183                         return (NULL);
 184                 }
 185                 v4addr = (struct sctp_ipv4addr_param *)ph;
 186                 sin = &store.sin;
 187                 memset(sin, 0, sizeof(*sin));
 188                 sin->sin_family = AF_INET;
 189                 sin->sin_len = sizeof(struct sockaddr_in);
 190                 sin->sin_port = stcb->rport;
 191                 sin->sin_addr.s_addr = v4addr->addr;
 192                 if ((sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 193                     IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 194                         bad_address = 1;
 195                 }
 196                 if (sin->sin_addr.s_addr == INADDR_ANY)
 197                         zero_address = 1;
 198                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 199                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 200                 break;
 201 #endif
 202 #ifdef INET6
 203         case SCTP_IPV6_ADDRESS:
 204                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 205                         /* invalid param size */
 206                         return (NULL);
 207                 }
 208                 v6addr = (struct sctp_ipv6addr_param *)ph;
 209                 sin6 = &store.sin6;
 210                 memset(sin6, 0, sizeof(*sin6));
 211                 sin6->sin6_family = AF_INET6;
 212                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 213                 sin6->sin6_port = stcb->rport;
 214                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 215                     sizeof(struct in6_addr));
 216                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 217                         bad_address = 1;
 218                 }
 219                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 220                         zero_address = 1;
 221                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
 222                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 223                 break;
 224 #endif
 225         default:
 226                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 227                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph,
 228                     aparam_length);
 229                 return (m_reply);
 230         }                       /* end switch */
 231
 232         /* if 0.0.0.0/::0, add the source address instead */
 233         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 234                 sa = src;
 235                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 236                     "process_asconf_add_ip: using source addr ");
 237                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 238         }
 239         /* add the address */
 240         if (bad_address) {
 241                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 242                     SCTP_CAUSE_INVALID_PARAM, (uint8_t *)aph,
 243                     aparam_length);
 244         } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port,
 245                     SCTP_DONOT_SETSCOPE,
 246             SCTP_ADDR_DYNAMIC_ADDED) != 0) {
 247                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 248                     "process_asconf_add_ip: error adding address\n");
 249                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 250                     SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *)aph,
 251                     aparam_length);
 252         } else {
 253                 /* notify upper layer */
 254                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 255                 if (response_required) {
 256                         m_reply =
 257                             sctp_asconf_success_response(aph->correlation_id);
 258                 }
 259                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
 260                 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
 261                     stcb, net);
 262                 if (send_hb) {
 263                         sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 264                 }
 265         }
 266         return (m_reply);
 267 }
 268
 269 static int
 270 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
 271 {
 272         struct sctp_nets *src_net, *net;
 273
 274         /* make sure the source address exists as a destination net */
 275         src_net = sctp_findnet(stcb, src);
 276         if (src_net == NULL) {
 277                 /* not found */
 278                 return (-1);
 279         }
 280
 281         /* delete all destination addresses except the source */
 282         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 283                 if (net != src_net) {
 284                         /* delete this address */
 285                         sctp_remove_net(stcb, net);
 286                         SCTPDBG(SCTP_DEBUG_ASCONF1,
 287                             "asconf_del_remote_addrs_except: deleting ");
 288                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
 289                             (struct sockaddr *)&net->ro._l_addr);
 290                         /* notify upper layer */
 291                         sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
 292                             (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
 293                 }
 294         }
 295         return (0);
 296 }
 297
 298 static struct mbuf *
 299 sctp_process_asconf_delete_ip(struct sockaddr *src,
 300     struct sctp_asconf_paramhdr *aph,
 301     struct sctp_tcb *stcb, int response_required)
 302 {
 303         struct mbuf *m_reply = NULL;
 304         union sctp_sockstore store;
 305         struct sctp_paramhdr *ph;
 306         uint16_t param_type, aparam_length;
 307 #if defined(INET) || defined(INET6)
 308         uint16_t param_length;
 309 #endif
 310         struct sockaddr *sa;
 311         int zero_address = 0;
 312         int result;
 313 #ifdef INET
 314         struct sockaddr_in *sin;
 315         struct sctp_ipv4addr_param *v4addr;
 316 #endif
 317 #ifdef INET6
 318         struct sockaddr_in6 *sin6;
 319         struct sctp_ipv6addr_param *v6addr;
 320 #endif
 321
 322         aparam_length = ntohs(aph->ph.param_length);
 323         ph = (struct sctp_paramhdr *)(aph + 1);
 324         param_type = ntohs(ph->param_type);
 325 #if defined(INET) || defined(INET6)
 326         param_length = ntohs(ph->param_length);
 327 #endif
 328         sa = &store.sa;
 329         switch (param_type) {
 330 #ifdef INET
 331         case SCTP_IPV4_ADDRESS:
 332                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 333                         /* invalid param size */
 334                         return (NULL);
 335                 }
 336                 v4addr = (struct sctp_ipv4addr_param *)ph;
 337                 sin = &store.sin;
 338                 memset(sin, 0, sizeof(*sin));
 339                 sin->sin_family = AF_INET;
 340                 sin->sin_len = sizeof(struct sockaddr_in);
 341                 sin->sin_port = stcb->rport;
 342                 sin->sin_addr.s_addr = v4addr->addr;
 343                 if (sin->sin_addr.s_addr == INADDR_ANY)
 344                         zero_address = 1;
 345                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 346                     "process_asconf_delete_ip: deleting ");
 347                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 348                 break;
 349 #endif
 350 #ifdef INET6
 351         case SCTP_IPV6_ADDRESS:
 352                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 353                         /* invalid param size */
 354                         return (NULL);
 355                 }
 356                 v6addr = (struct sctp_ipv6addr_param *)ph;
 357                 sin6 = &store.sin6;
 358                 memset(sin6, 0, sizeof(*sin6));
 359                 sin6->sin6_family = AF_INET6;
 360                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 361                 sin6->sin6_port = stcb->rport;
 362                 memcpy(&sin6->sin6_addr, v6addr->addr,
 363                     sizeof(struct in6_addr));
 364                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 365                         zero_address = 1;
 366                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 367                     "process_asconf_delete_ip: deleting ");
 368                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 369                 break;
 370 #endif
 371         default:
 372                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 373                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 374                     aparam_length);
 375                 return (m_reply);
 376         }
 377
 378         /* make sure the source address is not being deleted */
 379         if (sctp_cmpaddr(sa, src)) {
 380                 /* trying to delete the source address! */
 381                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
 382                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 383                     SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *)aph,
 384                     aparam_length);
 385                 return (m_reply);
 386         }
 387
 388         /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
 389         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 390                 result = sctp_asconf_del_remote_addrs_except(stcb, src);
 391
 392                 if (result) {
 393                         /* src address did not exist? */
 394                         SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
 395                         /* what error to reply with?? */
 396                         m_reply =
 397                             sctp_asconf_error_response(aph->correlation_id,
 398                             SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *)aph,
 399                             aparam_length);
 400                 } else if (response_required) {
 401                         m_reply =
 402                             sctp_asconf_success_response(aph->correlation_id);
 403                 }
 404                 return (m_reply);
 405         }
 406
 407         /* delete the address */
 408         result = sctp_del_remote_addr(stcb, sa);
 409         /*
 410          * note if result == -2, the address doesn't exist in the asoc but
 411          * since it's being deleted anyways, we just ack the delete -- but
 412          * this probably means something has already gone awry
 413          */
 414         if (result == -1) {
 415                 /* only one address in the asoc */
 416                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
 417                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 418                     SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *)aph,
 419                     aparam_length);
 420         } else {
 421                 if (response_required) {
 422                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 423                 }
 424                 /* notify upper layer */
 425                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 426         }
 427         return (m_reply);
 428 }
 429
 430 static struct mbuf *
 431 sctp_process_asconf_set_primary(struct sockaddr *src,
 432     struct sctp_asconf_paramhdr *aph,
 433     struct sctp_tcb *stcb, int response_required)
 434 {
 435         struct mbuf *m_reply = NULL;
 436         union sctp_sockstore store;
 437         struct sctp_paramhdr *ph;
 438         uint16_t param_type, aparam_length;
 439 #if defined(INET) || defined(INET6)
 440         uint16_t param_length;
 441 #endif
 442         struct sockaddr *sa;
 443         int zero_address = 0;
 444 #ifdef INET
 445         struct sockaddr_in *sin;
 446         struct sctp_ipv4addr_param *v4addr;
 447 #endif
 448 #ifdef INET6
 449         struct sockaddr_in6 *sin6;
 450         struct sctp_ipv6addr_param *v6addr;
 451 #endif
 452
 453         aparam_length = ntohs(aph->ph.param_length);
 454         ph = (struct sctp_paramhdr *)(aph + 1);
 455         param_type = ntohs(ph->param_type);
 456 #if defined(INET) || defined(INET6)
 457         param_length = ntohs(ph->param_length);
 458 #endif
 459         sa = &store.sa;
 460         switch (param_type) {
 461 #ifdef INET
 462         case SCTP_IPV4_ADDRESS:
 463                 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
 464                         /* invalid param size */
 465                         return (NULL);
 466                 }
 467                 v4addr = (struct sctp_ipv4addr_param *)ph;
 468                 sin = &store.sin;
 469                 memset(sin, 0, sizeof(*sin));
 470                 sin->sin_family = AF_INET;
 471                 sin->sin_len = sizeof(struct sockaddr_in);
 472                 sin->sin_addr.s_addr = v4addr->addr;
 473                 if (sin->sin_addr.s_addr == INADDR_ANY)
 474                         zero_address = 1;
 475                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 476                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 477                 break;
 478 #endif
 479 #ifdef INET6
 480         case SCTP_IPV6_ADDRESS:
 481                 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
 482                         /* invalid param size */
 483                         return (NULL);
 484                 }
 485                 v6addr = (struct sctp_ipv6addr_param *)ph;
 486                 sin6 = &store.sin6;
 487                 memset(sin6, 0, sizeof(*sin6));
 488                 sin6->sin6_family = AF_INET6;
 489                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 490                 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
 491                     sizeof(struct in6_addr));
 492                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 493                         zero_address = 1;
 494                 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
 495                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
 496                 break;
 497 #endif
 498         default:
 499                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 500                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 501                     aparam_length);
 502                 return (m_reply);
 503         }
 504
 505         /* if 0.0.0.0/::0, use the source address instead */
 506         if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
 507                 sa = src;
 508                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 509                     "process_asconf_set_primary: using source addr ");
 510                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 511         }
 512         /* set the primary address */
 513         if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
 514                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 515                     "process_asconf_set_primary: primary address set\n");
 516                 /* notify upper layer */
 517                 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
 518                 if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) &&
 519                     (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) &&
 520                     (stcb->asoc.alternate)) {
 521                         sctp_free_remote_addr(stcb->asoc.alternate);
 522                         stcb->asoc.alternate = NULL;
 523                 }
 524                 if (response_required) {
 525                         m_reply = sctp_asconf_success_response(aph->correlation_id);
 526                 }
 527                 /*
 528                  * Mobility adaptation. Ideally, when the reception of SET
 529                  * PRIMARY with DELETE IP ADDRESS of the previous primary
 530                  * destination, unacknowledged DATA are retransmitted
 531                  * immediately to the new primary destination for seamless
 532                  * handover. If the destination is UNCONFIRMED and marked to
 533                  * REQ_PRIM, The retransmission occur when reception of the
 534                  * HEARTBEAT-ACK.  (See sctp_handle_heartbeat_ack in
 535                  * sctp_input.c) Also, when change of the primary
 536                  * destination, it is better that all subsequent new DATA
 537                  * containing already queued DATA are transmitted to the new
 538                  * primary destination. (by micchie)
 539                  */
 540                 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
 541                     SCTP_MOBILITY_BASE) ||
 542                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 543                     SCTP_MOBILITY_FASTHANDOFF)) &&
 544                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 545                     SCTP_MOBILITY_PRIM_DELETED) &&
 546                     (stcb->asoc.primary_destination->dest_state &
 547                     SCTP_ADDR_UNCONFIRMED) == 0) {
 548
 549                         sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
 550                             stcb->sctp_ep, stcb, NULL,
 551                             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1);
 552                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 553                             SCTP_MOBILITY_FASTHANDOFF)) {
 554                                 sctp_assoc_immediate_retrans(stcb,
 555                                     stcb->asoc.primary_destination);
 556                         }
 557                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 558                             SCTP_MOBILITY_BASE)) {
 559                                 sctp_move_chunks_from_net(stcb,
 560                                     stcb->asoc.deleted_primary);
 561                         }
 562                         sctp_delete_prim_timer(stcb->sctp_ep, stcb,
 563                             stcb->asoc.deleted_primary);
 564                 }
 565         } else {
 566                 /* couldn't set the requested primary address! */
 567                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 568                     "process_asconf_set_primary: set primary failed!\n");
 569                 /* must have been an invalid address, so report */
 570                 m_reply = sctp_asconf_error_response(aph->correlation_id,
 571                     SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *)aph,
 572                     aparam_length);
 573         }
 574
 575         return (m_reply);
 576 }
 577
 578 /*
 579  * handles an ASCONF chunk.
 580  * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
 581  */
 582 void
 583 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
 584     struct sockaddr *src,
 585     struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
 586     int first)
 587 {
 588         struct sctp_association *asoc;
 589         uint32_t serial_num;
 590         struct mbuf *n, *m_ack, *m_result, *m_tail;
 591         struct sctp_asconf_ack_chunk *ack_cp;
 592         struct sctp_asconf_paramhdr *aph;
 593         struct sctp_ipv6addr_param *p_addr;
 594         unsigned int asconf_limit, cnt;
 595         int error = 0;          /* did an error occur? */
 596
 597         /* asconf param buffer */
 598         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
 599         struct sctp_asconf_ack *ack, *ack_next;
 600
 601         /* verify minimum length */
 602         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
 603                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 604                     "handle_asconf: chunk too small = %xh\n",
 605                     ntohs(cp->ch.chunk_length));
 606                 return;
 607         }
 608         asoc = &stcb->asoc;
 609         serial_num = ntohl(cp->serial_number);
 610
 611         if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) {
 612                 /* got a duplicate ASCONF */
 613                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 614                     "handle_asconf: got duplicate serial number = %xh\n",
 615                     serial_num);
 616                 return;
 617         } else if (serial_num != (asoc->asconf_seq_in + 1)) {
 618                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
 619                     serial_num, asoc->asconf_seq_in + 1);
 620                 return;
 621         }
 622
 623         /* it's the expected "next" sequence number, so process it */
 624         asoc->asconf_seq_in = serial_num;       /* update sequence */
 625         /* get length of all the param's in the ASCONF */
 626         asconf_limit = offset + ntohs(cp->ch.chunk_length);
 627         SCTPDBG(SCTP_DEBUG_ASCONF1,
 628             "handle_asconf: asconf_limit=%u, sequence=%xh\n",
 629             asconf_limit, serial_num);
 630
 631         if (first) {
 632                 /* delete old cache */
 633                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing first ASCONF. Try to delete old cache\n");
 634
 635                 TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) {
 636                         if (ack->serial_number == serial_num)
 637                                 break;
 638                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
 639                             ack->serial_number, serial_num);
 640                         TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next);
 641                         if (ack->data != NULL) {
 642                                 sctp_m_freem(ack->data);
 643                         }
 644                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
 645                 }
 646         }
 647
 648         m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
 649             M_NOWAIT, 1, MT_DATA);
 650         if (m_ack == NULL) {
 651                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 652                     "handle_asconf: couldn't get mbuf!\n");
 653                 return;
 654         }
 655         m_tail = m_ack;         /* current reply chain's tail */
 656
 657         /* fill in ASCONF-ACK header */
 658         ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
 659         ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
 660         ack_cp->ch.chunk_flags = 0;
 661         ack_cp->serial_number = htonl(serial_num);
 662         /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
 663         SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
 664         ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
 665
 666         /* skip the lookup address parameter */
 667         offset += sizeof(struct sctp_asconf_chunk);
 668         p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf);
 669         if (p_addr == NULL) {
 670                 SCTPDBG(SCTP_DEBUG_ASCONF1,
 671                     "handle_asconf: couldn't get lookup addr!\n");
 672                 /* respond with a missing/invalid mandatory parameter error */
 673                 sctp_m_freem(m_ack);
 674                 return;
 675         }
 676         /* param_length is already validated in process_control... */
 677         offset += ntohs(p_addr->ph.param_length);       /* skip lookup addr */
 678         /* get pointer to first asconf param in ASCONF */
 679         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf);
 680         if (aph == NULL) {
 681                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
 682                 goto send_reply;
 683         }
 684         /* process through all parameters */
 685         cnt = 0;
 686         while (aph != NULL) {
 687                 unsigned int param_length, param_type;
 688
 689                 param_type = ntohs(aph->ph.param_type);
 690                 param_length = ntohs(aph->ph.param_length);
 691                 if (offset + param_length > asconf_limit) {
 692                         /* parameter goes beyond end of chunk! */
 693                         sctp_m_freem(m_ack);
 694                         return;
 695                 }
 696                 m_result = NULL;
 697
 698                 if (param_length > sizeof(aparam_buf)) {
 699                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
 700                         sctp_m_freem(m_ack);
 701                         return;
 702                 }
 703                 if (param_length <= sizeof(struct sctp_paramhdr)) {
 704                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
 705                         sctp_m_freem(m_ack);
 706                 }
 707                 /* get the entire parameter */
 708                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
 709                 if (aph == NULL) {
 710                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
 711                         sctp_m_freem(m_ack);
 712                         return;
 713                 }
 714                 switch (param_type) {
 715                 case SCTP_ADD_IP_ADDRESS:
 716                         m_result = sctp_process_asconf_add_ip(src, aph, stcb,
 717                             (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error);
 718                         cnt++;
 719                         break;
 720                 case SCTP_DEL_IP_ADDRESS:
 721                         m_result = sctp_process_asconf_delete_ip(src, aph, stcb,
 722                             error);
 723                         break;
 724                 case SCTP_ERROR_CAUSE_IND:
 725                         /* not valid in an ASCONF chunk */
 726                         break;
 727                 case SCTP_SET_PRIM_ADDR:
 728                         m_result = sctp_process_asconf_set_primary(src, aph,
 729                             stcb, error);
 730                         break;
 731                 case SCTP_NAT_VTAGS:
 732                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
 733                         break;
 734                 case SCTP_SUCCESS_REPORT:
 735                         /* not valid in an ASCONF chunk */
 736                         break;
 737                 case SCTP_ULP_ADAPTATION:
 738                         /* FIX */
 739                         break;
 740                 default:
 741                         if ((param_type & 0x8000) == 0) {
 742                                 /* Been told to STOP at this param */
 743                                 asconf_limit = offset;
 744                                 /*
 745                                  * FIX FIX - We need to call
 746                                  * sctp_arethere_unrecognized_parameters()
 747                                  * to get a operr and send it for any
 748                                  * param's with the 0x4000 bit set OR do it
 749                                  * here ourselves... note we still must STOP
 750                                  * if the 0x8000 bit is clear.
 751                                  */
 752                         }
 753                         /* unknown/invalid param type */
 754                         break;
 755                 }               /* switch */
 756
 757                 /* add any (error) result to the reply mbuf chain */
 758                 if (m_result != NULL) {
 759                         SCTP_BUF_NEXT(m_tail) = m_result;
 760                         m_tail = m_result;
 761                         /* update lengths, make sure it's aligned too */
 762                         SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result));
 763                         ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
 764                         /* set flag to force success reports */
 765                         error = 1;
 766                 }
 767                 offset += SCTP_SIZE32(param_length);
 768                 /* update remaining ASCONF message length to process */
 769                 if (offset >= asconf_limit) {
 770                         /* no more data in the mbuf chain */
 771                         break;
 772                 }
 773                 /* get pointer to next asconf param */
 774                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
 775                     sizeof(struct sctp_asconf_paramhdr),
 776                     (uint8_t *)&aparam_buf);
 777                 if (aph == NULL) {
 778                         /* can't get an asconf paramhdr */
 779                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
 780                         /* FIX ME - add error here... */
 781                 }
 782         }
 783
 784 send_reply:
 785         ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
 786         /* save the ASCONF-ACK reply */
 787         ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
 788             struct sctp_asconf_ack);
 789         if (ack == NULL) {
 790                 sctp_m_freem(m_ack);
 791                 return;
 792         }
 793         ack->serial_number = serial_num;
 794         ack->last_sent_to = NULL;
 795         ack->data = m_ack;
 796         ack->len = 0;
 797         for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) {
 798                 ack->len += SCTP_BUF_LEN(n);
 799         }
 800         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
 801
 802         /* see if last_control_chunk_from is set properly (use IP src addr) */
 803         if (stcb->asoc.last_control_chunk_from == NULL) {
 804                 /*
 805                  * this could happen if the source address was just newly
 806                  * added
 807                  */
 808                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
 809                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
 810                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src);
 811                 /* look up the from address */
 812                 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src);
 813 #ifdef SCTP_DEBUG
 814                 if (stcb->asoc.last_control_chunk_from == NULL) {
 815                         SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
 816                 }
 817 #endif
 818         }
 819 }
 820
 821 /*
 822  * does the address match? returns 0 if not, 1 if so
 823  */
 824 static uint32_t
 825 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
 826 {
 827         switch (sa->sa_family) {
 828 #ifdef INET6
 829         case AF_INET6:
 830                 {
 831                         /* XXX scopeid */
 832                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 833
 834                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
 835                             (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
 836                             sizeof(struct in6_addr)) == 0)) {
 837                                 return (1);
 838                         }
 839                         break;
 840                 }
 841 #endif
 842 #ifdef INET
 843         case AF_INET:
 844                 {
 845                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 846
 847                         if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
 848                             (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
 849                             sizeof(struct in_addr)) == 0)) {
 850                                 return (1);
 851                         }
 852                         break;
 853                 }
 854 #endif
 855         default:
 856                 break;
 857         }
 858         return (0);
 859 }
 860
 861 /*
 862  * does the address match? returns 0 if not, 1 if so
 863  */
 864 static uint32_t
 865 sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
 866 {
 867 #if defined(INET) || defined(INET6)
 868         uint16_t param_type, param_length;
 869
 870         param_type = ntohs(ph->param_type);
 871         param_length = ntohs(ph->param_length);
 872 #endif
 873         switch (sa->sa_family) {
 874 #ifdef INET6
 875         case AF_INET6:
 876                 {
 877                         /* XXX scopeid */
 878                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 879                         struct sctp_ipv6addr_param *v6addr;
 880
 881                         v6addr = (struct sctp_ipv6addr_param *)ph;
 882                         if ((param_type == SCTP_IPV6_ADDRESS) &&
 883                             (param_length == sizeof(struct sctp_ipv6addr_param)) &&
 884                             (memcmp(&v6addr->addr, &sin6->sin6_addr,
 885                             sizeof(struct in6_addr)) == 0)) {
 886                                 return (1);
 887                         }
 888                         break;
 889                 }
 890 #endif
 891 #ifdef INET
 892         case AF_INET:
 893                 {
 894                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 895                         struct sctp_ipv4addr_param *v4addr;
 896
 897                         v4addr = (struct sctp_ipv4addr_param *)ph;
 898                         if ((param_type == SCTP_IPV4_ADDRESS) &&
 899                             (param_length == sizeof(struct sctp_ipv4addr_param)) &&
 900                             (memcmp(&v4addr->addr, &sin->sin_addr,
 901                             sizeof(struct in_addr)) == 0)) {
 902                                 return (1);
 903                         }
 904                         break;
 905                 }
 906 #endif
 907         default:
 908                 break;
 909         }
 910         return (0);
 911 }
 912
 913 /*
 914  * Cleanup for non-responded/OP ERR'd ASCONF
 915  */
 916 void
 917 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
 918 {
 919         /*
 920          * clear out any existing asconfs going out
 921          */
 922         sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
 923             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
 924         stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
 925         /* remove the old ASCONF on our outbound queue */
 926         sctp_toss_old_asconf(stcb);
 927 }
 928
 929 /*
 930  * cleanup any cached source addresses that may be topologically
 931  * incorrect after a new address has been added to this interface.
 932  */
 933 static void
 934 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
 935 {
 936         struct sctp_nets *net;
 937
 938         /*
 939          * Ideally, we want to only clear cached routes and source addresses
 940          * that are topologically incorrect.  But since there is no easy way
 941          * to know whether the newly added address on the ifn would cause a
 942          * routing change (i.e. a new egress interface would be chosen)
 943          * without doing a new routing lookup and source address selection,
 944          * we will (for now) just flush any cached route using a different
 945          * ifn (and cached source addrs) and let output re-choose them
 946          * during the next send on that net.
 947          */
 948         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 949                 /*
 950                  * clear any cached route (and cached source address) if the
 951                  * route's interface is NOT the same as the address change.
 952                  * If it's the same interface, just clear the cached source
 953                  * address.
 954                  */
 955                 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
 956                     ((ifn == NULL) ||
 957                     (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
 958                         /* clear any cached route */
 959                         RTFREE(net->ro.ro_rt);
 960                         net->ro.ro_rt = NULL;
 961                 }
 962                 /* clear any cached source address */
 963                 if (net->src_addr_selected) {
 964                         sctp_free_ifa(net->ro._s_addr);
 965                         net->ro._s_addr = NULL;
 966                         net->src_addr_selected = 0;
 967                 }
 968         }
 969 }
 970
 971
 972 void
 973 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
 974 {
 975         int error;
 976
 977         if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
 978                 return;
 979         }
 980         if (stcb->asoc.deleted_primary == NULL) {
 981                 return;
 982         }
 983
 984         if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
 985                 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
 986                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
 987                 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
 988                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
 989                 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
 990                     stcb->asoc.deleted_primary,
 991                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
 992                 stcb->asoc.num_send_timers_up--;
 993                 if (stcb->asoc.num_send_timers_up < 0) {
 994                         stcb->asoc.num_send_timers_up = 0;
 995                 }
 996                 SCTP_TCB_LOCK_ASSERT(stcb);
 997                 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
 998                     stcb->asoc.deleted_primary);
 999                 if (error) {
1000                         SCTP_INP_DECR_REF(stcb->sctp_ep);
1001                         return;
1002                 }
1003                 SCTP_TCB_LOCK_ASSERT(stcb);
1004 #ifdef SCTP_AUDITING_ENABLED
1005                 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1006 #endif
1007                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1008                 if ((stcb->asoc.num_send_timers_up == 0) &&
1009                     (stcb->asoc.sent_queue_cnt > 0)) {
1010                         struct sctp_tmit_chunk *chk;
1011
1012                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1013                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1014                             stcb, chk->whoTo);
1015                 }
1016         }
1017         return;
1018 }
1019
1020 static int
1021     sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1022
1023 void
1024 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1025 {
1026         struct sctp_tmit_chunk *chk;
1027
1028         SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1029         sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1030             SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4);
1031         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1032         net->error_count = 0;
1033         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1034                 if (chk->whoTo == net) {
1035                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
1036                                 chk->sent = SCTP_DATAGRAM_RESEND;
1037                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1038                                 sctp_flight_size_decrease(chk);
1039                                 sctp_total_flight_decrease(stcb, chk);
1040                                 net->marked_retrans++;
1041                                 stcb->asoc.marked_retrans++;
1042                         }
1043                 }
1044         }
1045         if (net->marked_retrans) {
1046                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1047         }
1048 }
1049
1050 static void
1051 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1052 {
1053         struct sctp_nets *net;
1054         int addrnum, changed;
1055
1056         /*
1057          * If number of local valid addresses is 1, the valid address is
1058          * probably newly added address. Several valid addresses in this
1059          * association.  A source address may not be changed.  Additionally,
1060          * they can be configured on a same interface as "alias" addresses.
1061          * (by micchie)
1062          */
1063         addrnum = sctp_local_addr_count(stcb);
1064         SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1065             addrnum);
1066         if (addrnum == 1) {
1067                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1068                         /* clear any cached route and source address */
1069                         if (net->ro.ro_rt) {
1070                                 RTFREE(net->ro.ro_rt);
1071                                 net->ro.ro_rt = NULL;
1072                         }
1073                         if (net->src_addr_selected) {
1074                                 sctp_free_ifa(net->ro._s_addr);
1075                                 net->ro._s_addr = NULL;
1076                                 net->src_addr_selected = 0;
1077                         }
1078                         /* Retransmit unacknowledged DATA chunks immediately */
1079                         if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1080                             SCTP_MOBILITY_FASTHANDOFF)) {
1081                                 sctp_net_immediate_retrans(stcb, net);
1082                         }
1083                         /* also, SET PRIMARY is maybe already sent */
1084                 }
1085                 return;
1086         }
1087
1088         /* Multiple local addresses exsist in the association.  */
1089         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1090                 /* clear any cached route and source address */
1091                 if (net->ro.ro_rt) {
1092                         RTFREE(net->ro.ro_rt);
1093                         net->ro.ro_rt = NULL;
1094                 }
1095                 if (net->src_addr_selected) {
1096                         sctp_free_ifa(net->ro._s_addr);
1097                         net->ro._s_addr = NULL;
1098                         net->src_addr_selected = 0;
1099                 }
1100                 /*
1101                  * Check if the nexthop is corresponding to the new address.
1102                  * If the new address is corresponding to the current
1103                  * nexthop, the path will be changed. If the new address is
1104                  * NOT corresponding to the current nexthop, the path will
1105                  * not be changed.
1106                  */
1107                 SCTP_RTALLOC((sctp_route_t *)&net->ro,
1108                     stcb->sctp_ep->def_vrf_id,
1109                     stcb->sctp_ep->fibnum);
1110                 if (net->ro.ro_rt == NULL)
1111                         continue;
1112
1113                 changed = 0;
1114                 switch (net->ro._l_addr.sa.sa_family) {
1115 #ifdef INET
1116                 case AF_INET:
1117                         if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) {
1118                                 changed = 1;
1119                         }
1120                         break;
1121 #endif
1122 #ifdef INET6
1123                 case AF_INET6:
1124                         if (sctp_v6src_match_nexthop(
1125                             &newifa->address.sin6, (sctp_route_t *)&net->ro)) {
1126                                 changed = 1;
1127                         }
1128                         break;
1129 #endif
1130                 default:
1131                         break;
1132                 }
1133                 /*
1134                  * if the newly added address does not relate routing
1135                  * information, we skip.
1136                  */
1137                 if (changed == 0)
1138                         continue;
1139                 /* Retransmit unacknowledged DATA chunks immediately */
1140                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1141                     SCTP_MOBILITY_FASTHANDOFF)) {
1142                         sctp_net_immediate_retrans(stcb, net);
1143                 }
1144                 /* Send SET PRIMARY for this new address */
1145                 if (net == stcb->asoc.primary_destination) {
1146                         (void)sctp_asconf_queue_mgmt(stcb, newifa,
1147                             SCTP_SET_PRIM_ADDR);
1148                 }
1149         }
1150 }
1151
1152 /*
1153  * process an ADD/DELETE IP ack from peer.
1154  * addr: corresponding sctp_ifa to the address being added/deleted.
1155  * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1156  * flag: 1=success, 0=failure.
1157  */
1158 static void
1159 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag)
1160 {
1161         /*
1162          * do the necessary asoc list work- if we get a failure indication,
1163          * leave the address on the assoc's restricted list.  If we get a
1164          * success indication, remove the address from the restricted list.
1165          */
1166         /*
1167          * Note: this will only occur for ADD_IP_ADDRESS, since
1168          * DEL_IP_ADDRESS is never actually added to the list...
1169          */
1170         if (flag) {
1171                 /* success case, so remove from the restricted list */
1172                 sctp_del_local_addr_restricted(stcb, addr);
1173
1174                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1175                     SCTP_MOBILITY_BASE) ||
1176                     sctp_is_mobility_feature_on(stcb->sctp_ep,
1177                     SCTP_MOBILITY_FASTHANDOFF)) {
1178                         sctp_path_check_and_react(stcb, addr);
1179                         return;
1180                 }
1181                 /* clear any cached/topologically incorrect source addresses */
1182                 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1183         }
1184         /* else, leave it on the list */
1185 }
1186
1187 /*
1188  * add an asconf add/delete/set primary IP address parameter to the queue.
1189  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1190  * returns 0 if queued, -1 if not queued/removed.
1191  * NOTE: if adding, but a delete for the same address is already scheduled
1192  * (and not yet sent out), simply remove it from queue.  Same for deleting
1193  * an address already scheduled for add.  If a duplicate operation is found,
1194  * ignore the new one.
1195  */
1196 static int
1197 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1198     uint16_t type)
1199 {
1200         struct sctp_asconf_addr *aa, *aa_next;
1201
1202         /* make sure the request isn't already in the queue */
1203         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1204                 /* address match? */
1205                 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1206                         continue;
1207                 /*
1208                  * is the request already in queue but not sent? pass the
1209                  * request already sent in order to resolve the following
1210                  * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1211                  * can't remove the ADD request already sent 3. arrival of
1212                  * ADD
1213                  */
1214                 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1215                         return (-1);
1216                 }
1217                 /* is the negative request already in queue, and not sent */
1218                 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1219                     (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1220                         /* add requested, delete already queued */
1221                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1222                         /* remove the ifa from the restricted list */
1223                         sctp_del_local_addr_restricted(stcb, ifa);
1224                         /* free the asconf param */
1225                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1226                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1227                         return (-1);
1228                 }
1229                 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1230                     (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1231                         /* delete requested, add already queued */
1232                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1233                         /* remove the aa->ifa from the restricted list */
1234                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1235                         /* free the asconf param */
1236                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1237                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1238                         return (-1);
1239                 }
1240         }                       /* for each aa */
1241
1242         /* adding new request to the queue */
1243         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1244             SCTP_M_ASC_ADDR);
1245         if (aa == NULL) {
1246                 /* didn't get memory */
1247                 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1248                 return (-1);
1249         }
1250         aa->special_del = 0;
1251         /* fill in asconf address parameter fields */
1252         /* top level elements are "networked" during send */
1253         aa->ap.aph.ph.param_type = type;
1254         aa->ifa = ifa;
1255         atomic_add_int(&ifa->refcount, 1);
1256         /* correlation_id filled in during send routine later... */
1257         switch (ifa->address.sa.sa_family) {
1258 #ifdef INET6
1259         case AF_INET6:
1260                 {
1261                         struct sockaddr_in6 *sin6;
1262
1263                         sin6 = &ifa->address.sin6;
1264                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1265                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1266                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1267                             sizeof(struct sctp_ipv6addr_param);
1268                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1269                             sizeof(struct in6_addr));
1270                         break;
1271                 }
1272 #endif
1273 #ifdef INET
1274         case AF_INET:
1275                 {
1276                         struct sockaddr_in *sin;
1277
1278                         sin = &ifa->address.sin;
1279                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1280                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1281                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1282                             sizeof(struct sctp_ipv4addr_param);
1283                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1284                             sizeof(struct in_addr));
1285                         break;
1286                 }
1287 #endif
1288         default:
1289                 /* invalid family! */
1290                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1291                 sctp_free_ifa(ifa);
1292                 return (-1);
1293         }
1294         aa->sent = 0;           /* clear sent flag */
1295
1296         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1297 #ifdef SCTP_DEBUG
1298         if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) {
1299                 if (type == SCTP_ADD_IP_ADDRESS) {
1300                         SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1301                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1302                 } else if (type == SCTP_DEL_IP_ADDRESS) {
1303                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1304                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1305                 } else {
1306                         SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1307                         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa);
1308                 }
1309         }
1310 #endif
1311
1312         return (0);
1313 }
1314
1315
1316 /*
1317  * add an asconf operation for the given ifa and type.
1318  * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1319  * returns 0 if completed, -1 if not completed, 1 if immediate send is
1320  * advisable.
1321  */
1322 static int
1323 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1324     uint16_t type)
1325 {
1326         uint32_t status;
1327         int pending_delete_queued = 0;
1328         int last;
1329
1330         /* see if peer supports ASCONF */
1331         if (stcb->asoc.asconf_supported == 0) {
1332                 return (-1);
1333         }
1334
1335         /*
1336          * if this is deleting the last address from the assoc, mark it as
1337          * pending.
1338          */
1339         if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) {
1340                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1341                         last = (sctp_local_addr_count(stcb) == 0);
1342                 } else {
1343                         last = (sctp_local_addr_count(stcb) == 1);
1344                 }
1345                 if (last) {
1346                         /* set the pending delete info only */
1347                         stcb->asoc.asconf_del_pending = 1;
1348                         stcb->asoc.asconf_addr_del_pending = ifa;
1349                         atomic_add_int(&ifa->refcount, 1);
1350                         SCTPDBG(SCTP_DEBUG_ASCONF2,
1351                             "asconf_queue_add: mark delete last address pending\n");
1352                         return (-1);
1353                 }
1354         }
1355
1356         /* queue an asconf parameter */
1357         status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1358
1359         /*
1360          * if this is an add, and there is a delete also pending (i.e. the
1361          * last local address is being changed), queue the pending delete
1362          * too.
1363          */
1364         if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1365                 /* queue in the pending delete */
1366                 if (sctp_asconf_queue_mgmt(stcb,
1367                     stcb->asoc.asconf_addr_del_pending,
1368                     SCTP_DEL_IP_ADDRESS) == 0) {
1369                         SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n");
1370                         pending_delete_queued = 1;
1371                         /* clear out the pending delete info */
1372                         stcb->asoc.asconf_del_pending = 0;
1373                         sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1374                         stcb->asoc.asconf_addr_del_pending = NULL;
1375                 }
1376         }
1377
1378         if (pending_delete_queued) {
1379                 struct sctp_nets *net;
1380
1381                 /*
1382                  * since we know that the only/last address is now being
1383                  * changed in this case, reset the cwnd/rto on all nets to
1384                  * start as a new address and path.  Also clear the error
1385                  * counts to give the assoc the best chance to complete the
1386                  * address change.
1387                  */
1388                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1389                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1390                             net);
1391                         net->RTO = 0;
1392                         net->error_count = 0;
1393                 }
1394                 stcb->asoc.overall_error_count = 0;
1395                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1396                         sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1397                             stcb->asoc.overall_error_count,
1398                             0,
1399                             SCTP_FROM_SCTP_ASCONF,
1400                             __LINE__);
1401                 }
1402
1403                 /* queue in an advisory set primary too */
1404                 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1405                 /* let caller know we should send this out immediately */
1406                 status = 1;
1407         }
1408         return (status);
1409 }
1410
1411 /*-
1412  * add an asconf delete IP address parameter to the queue by sockaddr and
1413  * possibly with no sctp_ifa available.  This is only called by the routine
1414  * that checks the addresses in an INIT-ACK against the current address list.
1415  * returns 0 if completed, non-zero if not completed.
1416  * NOTE: if an add is already scheduled (and not yet sent out), simply
1417  * remove it from queue.  If a duplicate operation is found, ignore the
1418  * new one.
1419  */
1420 static int
1421 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1422 {
1423         struct sctp_ifa *ifa;
1424         struct sctp_asconf_addr *aa, *aa_next;
1425
1426         if (stcb == NULL) {
1427                 return (-1);
1428         }
1429         /* see if peer supports ASCONF */
1430         if (stcb->asoc.asconf_supported == 0) {
1431                 return (-1);
1432         }
1433         /* make sure the request isn't already in the queue */
1434         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1435                 /* address match? */
1436                 if (sctp_asconf_addr_match(aa, sa) == 0)
1437                         continue;
1438                 /* is the request already in queue (sent or not) */
1439                 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1440                         return (-1);
1441                 }
1442                 /* is the negative request already in queue, and not sent */
1443                 if (aa->sent == 1)
1444                         continue;
1445                 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1446                         /* add already queued, so remove existing entry */
1447                         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1448                         sctp_del_local_addr_restricted(stcb, aa->ifa);
1449                         /* free the entry */
1450                         SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1451                         return (-1);
1452                 }
1453         }                       /* for each aa */
1454
1455         /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1456         ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED);
1457
1458         /* adding new request to the queue */
1459         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1460             SCTP_M_ASC_ADDR);
1461         if (aa == NULL) {
1462                 /* didn't get memory */
1463                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1464                     "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1465                 return (-1);
1466         }
1467         aa->special_del = 0;
1468         /* fill in asconf address parameter fields */
1469         /* top level elements are "networked" during send */
1470         aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1471         aa->ifa = ifa;
1472         if (ifa)
1473                 atomic_add_int(&ifa->refcount, 1);
1474         /* correlation_id filled in during send routine later... */
1475         switch (sa->sa_family) {
1476 #ifdef INET6
1477         case AF_INET6:
1478                 {
1479                         /* IPv6 address */
1480                         struct sockaddr_in6 *sin6;
1481
1482                         sin6 = (struct sockaddr_in6 *)sa;
1483                         aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1484                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1485                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1486                         memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1487                             sizeof(struct in6_addr));
1488                         break;
1489                 }
1490 #endif
1491 #ifdef INET
1492         case AF_INET:
1493                 {
1494                         /* IPv4 address */
1495                         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1496
1497                         aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1498                         aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1499                         aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1500                         memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1501                             sizeof(struct in_addr));
1502                         break;
1503                 }
1504 #endif
1505         default:
1506                 /* invalid family! */
1507                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1508                 if (ifa)
1509                         sctp_free_ifa(ifa);
1510                 return (-1);
1511         }
1512         aa->sent = 0;           /* clear sent flag */
1513
1514         /* delete goes to the back of the queue */
1515         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1516
1517         /* sa_ignore MEMLEAK {memory is put on the tailq} */
1518         return (0);
1519 }
1520
1521 /*
1522  * find a specific asconf param on our "sent" queue
1523  */
1524 static struct sctp_asconf_addr *
1525 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1526 {
1527         struct sctp_asconf_addr *aa;
1528
1529         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1530                 if (aa->ap.aph.correlation_id == correlation_id &&
1531                     aa->sent == 1) {
1532                         /* found it */
1533                         return (aa);
1534                 }
1535         }
1536         /* didn't find it */
1537         return (NULL);
1538 }
1539
1540 /*
1541  * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1542  * notifications based on the error response
1543  */
1544 static void
1545 sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED,
1546     struct sctp_asconf_paramhdr *aph)
1547 {
1548         struct sctp_error_cause *eh;
1549         struct sctp_paramhdr *ph;
1550         uint16_t param_type;
1551         uint16_t error_code;
1552
1553         eh = (struct sctp_error_cause *)(aph + 1);
1554         ph = (struct sctp_paramhdr *)(eh + 1);
1555         /* validate lengths */
1556         if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1557             htons(aph->ph.param_length)) {
1558                 /* invalid error cause length */
1559                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1560                     "asconf_process_error: cause element too long\n");
1561                 return;
1562         }
1563         if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1564             htons(eh->length)) {
1565                 /* invalid included TLV length */
1566                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1567                     "asconf_process_error: included TLV too long\n");
1568                 return;
1569         }
1570         /* which error code ? */
1571         error_code = ntohs(eh->code);
1572         param_type = ntohs(aph->ph.param_type);
1573         /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1574         switch (error_code) {
1575         case SCTP_CAUSE_RESOURCE_SHORTAGE:
1576                 /* we allow ourselves to "try again" for this error */
1577                 break;
1578         default:
1579                 /* peer can't handle it... */
1580                 switch (param_type) {
1581                 case SCTP_ADD_IP_ADDRESS:
1582                 case SCTP_DEL_IP_ADDRESS:
1583                 case SCTP_SET_PRIM_ADDR:
1584                         break;
1585                 default:
1586                         break;
1587                 }
1588         }
1589 }
1590
1591 /*
1592  * process an asconf queue param.
1593  * aparam: parameter to process, will be removed from the queue.
1594  * flag: 1=success case, 0=failure case
1595  */
1596 static void
1597 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1598     struct sctp_asconf_addr *aparam, uint32_t flag)
1599 {
1600         uint16_t param_type;
1601
1602         /* process this param */
1603         param_type = aparam->ap.aph.ph.param_type;
1604         switch (param_type) {
1605         case SCTP_ADD_IP_ADDRESS:
1606                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1607                     "process_param_ack: added IP address\n");
1608                 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag);
1609                 break;
1610         case SCTP_DEL_IP_ADDRESS:
1611                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1612                     "process_param_ack: deleted IP address\n");
1613                 /* nothing really to do... lists already updated */
1614                 break;
1615         case SCTP_SET_PRIM_ADDR:
1616                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1617                     "process_param_ack: set primary IP address\n");
1618                 /* nothing to do... peer may start using this addr */
1619                 break;
1620         default:
1621                 /* should NEVER happen */
1622                 break;
1623         }
1624
1625         /* remove the param and free it */
1626         TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1627         if (aparam->ifa)
1628                 sctp_free_ifa(aparam->ifa);
1629         SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1630 }
1631
1632 /*
1633  * cleanup from a bad asconf ack parameter
1634  */
1635 static void
1636 sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED)
1637 {
1638         /* assume peer doesn't really know how to do asconfs */
1639         /* XXX we could free the pending queue here */
1640
1641 }
1642
1643 void
1644 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1645     struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1646     struct sctp_nets *net, int *abort_no_unlock)
1647 {
1648         struct sctp_association *asoc;
1649         uint32_t serial_num;
1650         uint16_t ack_length;
1651         struct sctp_asconf_paramhdr *aph;
1652         struct sctp_asconf_addr *aa, *aa_next;
1653         uint32_t last_error_id = 0;     /* last error correlation id */
1654         uint32_t id;
1655         struct sctp_asconf_addr *ap;
1656
1657         /* asconf param buffer */
1658         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1659
1660         /* verify minimum length */
1661         if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1662                 SCTPDBG(SCTP_DEBUG_ASCONF1,
1663                     "handle_asconf_ack: chunk too small = %xh\n",
1664                     ntohs(cp->ch.chunk_length));
1665                 return;
1666         }
1667         asoc = &stcb->asoc;
1668         serial_num = ntohl(cp->serial_number);
1669
1670         /*
1671          * NOTE: we may want to handle this differently- currently, we will
1672          * abort when we get an ack for the expected serial number + 1 (eg.
1673          * we didn't send it), process an ack normally if it is the expected
1674          * serial number, and re-send the previous ack for *ALL* other
1675          * serial numbers
1676          */
1677
1678         /*
1679          * if the serial number is the next expected, but I didn't send it,
1680          * abort the asoc, since someone probably just hijacked us...
1681          */
1682         if (serial_num == (asoc->asconf_seq_out + 1)) {
1683                 struct mbuf *op_err;
1684                 char msg[SCTP_DIAG_INFO_LEN];
1685
1686                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1687                 snprintf(msg, sizeof(msg), "Never sent serial number %8.8x",
1688                     serial_num);
1689                 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
1690                 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
1691                 *abort_no_unlock = 1;
1692                 return;
1693         }
1694         if (serial_num != asoc->asconf_seq_out_acked + 1) {
1695                 /* got a duplicate/unexpected ASCONF-ACK */
1696                 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1697                     serial_num, asoc->asconf_seq_out_acked + 1);
1698                 return;
1699         }
1700
1701         if (serial_num == asoc->asconf_seq_out - 1) {
1702                 /* stop our timer */
1703                 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1704                     SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5);
1705         }
1706
1707         /* process the ASCONF-ACK contents */
1708         ack_length = ntohs(cp->ch.chunk_length) -
1709             sizeof(struct sctp_asconf_ack_chunk);
1710         offset += sizeof(struct sctp_asconf_ack_chunk);
1711         /* process through all parameters */
1712         while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1713                 unsigned int param_length, param_type;
1714
1715                 /* get pointer to next asconf parameter */
1716                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1717                     sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1718                 if (aph == NULL) {
1719                         /* can't get an asconf paramhdr */
1720                         sctp_asconf_ack_clear(stcb);
1721                         return;
1722                 }
1723                 param_type = ntohs(aph->ph.param_type);
1724                 param_length = ntohs(aph->ph.param_length);
1725                 if (param_length > ack_length) {
1726                         sctp_asconf_ack_clear(stcb);
1727                         return;
1728                 }
1729                 if (param_length < sizeof(struct sctp_paramhdr)) {
1730                         sctp_asconf_ack_clear(stcb);
1731                         return;
1732                 }
1733                 /* get the complete parameter... */
1734                 if (param_length > sizeof(aparam_buf)) {
1735                         SCTPDBG(SCTP_DEBUG_ASCONF1,
1736                             "param length (%u) larger than buffer size!\n", param_length);
1737                         sctp_asconf_ack_clear(stcb);
1738                         return;
1739                 }
1740                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1741                 if (aph == NULL) {
1742                         sctp_asconf_ack_clear(stcb);
1743                         return;
1744                 }
1745                 /* correlation_id is transparent to peer, no ntohl needed */
1746                 id = aph->correlation_id;
1747
1748                 switch (param_type) {
1749                 case SCTP_ERROR_CAUSE_IND:
1750                         last_error_id = id;
1751                         /* find the corresponding asconf param in our queue */
1752                         ap = sctp_asconf_find_param(stcb, id);
1753                         if (ap == NULL) {
1754                                 /* hmm... can't find this in our queue! */
1755                                 break;
1756                         }
1757                         /* process the parameter, failed flag */
1758                         sctp_asconf_process_param_ack(stcb, ap, 0);
1759                         /* process the error response */
1760                         sctp_asconf_process_error(stcb, aph);
1761                         break;
1762                 case SCTP_SUCCESS_REPORT:
1763                         /* find the corresponding asconf param in our queue */
1764                         ap = sctp_asconf_find_param(stcb, id);
1765                         if (ap == NULL) {
1766                                 /* hmm... can't find this in our queue! */
1767                                 break;
1768                         }
1769                         /* process the parameter, success flag */
1770                         sctp_asconf_process_param_ack(stcb, ap, 1);
1771                         break;
1772                 default:
1773                         break;
1774                 }               /* switch */
1775
1776                 /* update remaining ASCONF-ACK message length to process */
1777                 ack_length -= SCTP_SIZE32(param_length);
1778                 if (ack_length <= 0) {
1779                         /* no more data in the mbuf chain */
1780                         break;
1781                 }
1782                 offset += SCTP_SIZE32(param_length);
1783         }                       /* while */
1784
1785         /*
1786          * if there are any "sent" params still on the queue, these are
1787          * implicitly "success", or "failed" (if we got an error back) ...
1788          * so process these appropriately
1789          *
1790          * we assume that the correlation_id's are monotonically increasing
1791          * beginning from 1 and that we don't have *that* many outstanding
1792          * at any given time
1793          */
1794         if (last_error_id == 0)
1795                 last_error_id--;        /* set to "max" value */
1796         TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) {
1797                 if (aa->sent == 1) {
1798                         /*
1799                          * implicitly successful or failed if correlation_id
1800                          * < last_error_id, then success else, failure
1801                          */
1802                         if (aa->ap.aph.correlation_id < last_error_id)
1803                                 sctp_asconf_process_param_ack(stcb, aa, 1);
1804                         else
1805                                 sctp_asconf_process_param_ack(stcb, aa, 0);
1806                 } else {
1807                         /*
1808                          * since we always process in order (FIFO queue) if
1809                          * we reach one that hasn't been sent, the rest
1810                          * should not have been sent either. so, we're
1811                          * done...
1812                          */
1813                         break;
1814                 }
1815         }
1816
1817         /* update the next sequence number to use */
1818         asoc->asconf_seq_out_acked++;
1819         /* remove the old ASCONF on our outbound queue */
1820         sctp_toss_old_asconf(stcb);
1821         if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1822 #ifdef SCTP_TIMER_BASED_ASCONF
1823                 /* we have more params, so restart our timer */
1824                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1825                     stcb, net);
1826 #else
1827                 /* we have more params, so send out more */
1828                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1829 #endif
1830         }
1831 }
1832
1833 #ifdef INET6
1834 static uint32_t
1835 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1836 {
1837         struct sockaddr_in6 *sin6, *net6;
1838         struct sctp_nets *net;
1839
1840         if (sa->sa_family != AF_INET6) {
1841                 /* wrong family */
1842                 return (0);
1843         }
1844         sin6 = (struct sockaddr_in6 *)sa;
1845         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1846                 /* not link local address */
1847                 return (0);
1848         }
1849         /* hunt through our destination nets list for this scope_id */
1850         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1851                 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1852                     AF_INET6)
1853                         continue;
1854                 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1855                 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1856                         continue;
1857                 if (sctp_is_same_scope(sin6, net6)) {
1858                         /* found one */
1859                         return (1);
1860                 }
1861         }
1862         /* didn't find one */
1863         return (0);
1864 }
1865 #endif
1866
1867 /*
1868  * address management functions
1869  */
1870 static void
1871 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1872     struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1873 {
1874         int status;
1875
1876         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 ||
1877             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1878                 /* subset bound, no ASCONF allowed case, so ignore */
1879                 return;
1880         }
1881         /*
1882          * note: we know this is not the subset bound, no ASCONF case eg.
1883          * this is boundall or subset bound w/ASCONF allowed
1884          */
1885
1886         /* first, make sure that the address is IPv4 or IPv6 and not jailed */
1887         switch (ifa->address.sa.sa_family) {
1888 #ifdef INET6
1889         case AF_INET6:
1890                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1891                     &ifa->address.sin6.sin6_addr) != 0) {
1892                         return;
1893                 }
1894                 break;
1895 #endif
1896 #ifdef INET
1897         case AF_INET:
1898                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1899                     &ifa->address.sin.sin_addr) != 0) {
1900                         return;
1901                 }
1902                 break;
1903 #endif
1904         default:
1905                 return;
1906         }
1907 #ifdef INET6
1908         /* make sure we're "allowed" to add this type of addr */
1909         if (ifa->address.sa.sa_family == AF_INET6) {
1910                 /* invalid if we're not a v6 endpoint */
1911                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1912                         return;
1913                 /* is the v6 addr really valid ? */
1914                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1915                         return;
1916                 }
1917         }
1918 #endif
1919         /* put this address on the "pending/do not use yet" list */
1920         sctp_add_local_addr_restricted(stcb, ifa);
1921         /*
1922          * check address scope if address is out of scope, don't queue
1923          * anything... note: this would leave the address on both inp and
1924          * asoc lists
1925          */
1926         switch (ifa->address.sa.sa_family) {
1927 #ifdef INET6
1928         case AF_INET6:
1929                 {
1930                         struct sockaddr_in6 *sin6;
1931
1932                         sin6 = &ifa->address.sin6;
1933                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1934                                 /* we skip unspecifed addresses */
1935                                 return;
1936                         }
1937                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1938                                 if (stcb->asoc.scope.local_scope == 0) {
1939                                         return;
1940                                 }
1941                                 /* is it the right link local scope? */
1942                                 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
1943                                         return;
1944                                 }
1945                         }
1946                         if (stcb->asoc.scope.site_scope == 0 &&
1947                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1948                                 return;
1949                         }
1950                         break;
1951                 }
1952 #endif
1953 #ifdef INET
1954         case AF_INET:
1955                 {
1956                         struct sockaddr_in *sin;
1957                         struct in6pcb *inp6;
1958
1959                         inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1960                         /* invalid if we are a v6 only endpoint */
1961                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1962                             SCTP_IPV6_V6ONLY(inp6))
1963                                 return;
1964
1965                         sin = &ifa->address.sin;
1966                         if (sin->sin_addr.s_addr == 0) {
1967                                 /* we skip unspecifed addresses */
1968                                 return;
1969                         }
1970                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
1971                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1972                                 return;
1973                         }
1974                         break;
1975                 }
1976 #endif
1977         default:
1978                 /* else, not AF_INET or AF_INET6, so skip */
1979                 return;
1980         }
1981
1982         /* queue an asconf for this address add/delete */
1983         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1984                 /* does the peer do asconf? */
1985                 if (stcb->asoc.asconf_supported) {
1986                         /* queue an asconf for this addr */
1987                         status = sctp_asconf_queue_add(stcb, ifa, type);
1988
1989                         /*
1990                          * if queued ok, and in the open state, send out the
1991                          * ASCONF.  If in the non-open state, these will be
1992                          * sent when the state goes open.
1993                          */
1994                         if (status == 0 &&
1995                             ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
1996                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) {
1997 #ifdef SCTP_TIMER_BASED_ASCONF
1998                                 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
1999                                     stcb, stcb->asoc.primary_destination);
2000 #else
2001                                 sctp_send_asconf(stcb, NULL, addr_locked);
2002 #endif
2003                         }
2004                 }
2005         }
2006 }
2007
2008
2009 int
2010 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2011 {
2012         struct sctp_asconf_iterator *asc;
2013         struct sctp_ifa *ifa;
2014         struct sctp_laddr *l;
2015         int cnt_invalid = 0;
2016
2017         asc = (struct sctp_asconf_iterator *)ptr;
2018         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2019                 ifa = l->ifa;
2020                 switch (ifa->address.sa.sa_family) {
2021 #ifdef INET6
2022                 case AF_INET6:
2023                         /* invalid if we're not a v6 endpoint */
2024                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2025                                 cnt_invalid++;
2026                                 if (asc->cnt == cnt_invalid)
2027                                         return (1);
2028                         }
2029                         break;
2030 #endif
2031 #ifdef INET
2032                 case AF_INET:
2033                         {
2034                                 /* invalid if we are a v6 only endpoint */
2035                                 struct in6pcb *inp6;
2036
2037                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2038                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2039                                     SCTP_IPV6_V6ONLY(inp6)) {
2040                                         cnt_invalid++;
2041                                         if (asc->cnt == cnt_invalid)
2042                                                 return (1);
2043                                 }
2044                                 break;
2045                         }
2046 #endif
2047                 default:
2048                         /* invalid address family */
2049                         cnt_invalid++;
2050                         if (asc->cnt == cnt_invalid)
2051                                 return (1);
2052                 }
2053         }
2054         return (0);
2055 }
2056
2057 static int
2058 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED)
2059 {
2060         struct sctp_ifa *ifa;
2061         struct sctp_asconf_iterator *asc;
2062         struct sctp_laddr *laddr, *nladdr, *l;
2063
2064         /* Only for specific case not bound all */
2065         asc = (struct sctp_asconf_iterator *)ptr;
2066         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2067                 ifa = l->ifa;
2068                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2069                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
2070                             sctp_nxt_addr) {
2071                                 if (laddr->ifa == ifa) {
2072                                         laddr->action = 0;
2073                                         break;
2074                                 }
2075
2076                         }
2077                 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2078                         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
2079                                 /* remove only after all guys are done */
2080                                 if (laddr->ifa == ifa) {
2081                                         sctp_del_local_addr_ep(inp, ifa);
2082                                 }
2083                         }
2084                 }
2085         }
2086         return (0);
2087 }
2088
2089 void
2090 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2091     void *ptr, uint32_t val SCTP_UNUSED)
2092 {
2093         struct sctp_asconf_iterator *asc;
2094         struct sctp_ifa *ifa;
2095         struct sctp_laddr *l;
2096         int cnt_invalid = 0;
2097         int type, status;
2098         int num_queued = 0;
2099
2100         asc = (struct sctp_asconf_iterator *)ptr;
2101         LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2102                 ifa = l->ifa;
2103                 type = l->action;
2104
2105                 /* address's vrf_id must be the vrf_id of the assoc */
2106                 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2107                         continue;
2108                 }
2109
2110                 /* Same checks again for assoc */
2111                 switch (ifa->address.sa.sa_family) {
2112 #ifdef INET6
2113                 case AF_INET6:
2114                         {
2115                                 /* invalid if we're not a v6 endpoint */
2116                                 struct sockaddr_in6 *sin6;
2117
2118                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2119                                         cnt_invalid++;
2120                                         if (asc->cnt == cnt_invalid)
2121                                                 return;
2122                                         else
2123                                                 continue;
2124                                 }
2125                                 sin6 = &ifa->address.sin6;
2126                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2127                                         /* we skip unspecifed addresses */
2128                                         continue;
2129                                 }
2130                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2131                                     &sin6->sin6_addr) != 0) {
2132                                         continue;
2133                                 }
2134                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2135                                         if (stcb->asoc.scope.local_scope == 0) {
2136                                                 continue;
2137                                         }
2138                                         /* is it the right link local scope? */
2139                                         if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2140                                                 continue;
2141                                         }
2142                                 }
2143                                 break;
2144                         }
2145 #endif
2146 #ifdef INET
2147                 case AF_INET:
2148                         {
2149                                 /* invalid if we are a v6 only endpoint */
2150                                 struct in6pcb *inp6;
2151                                 struct sockaddr_in *sin;
2152
2153                                 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2154                                 /* invalid if we are a v6 only endpoint */
2155                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2156                                     SCTP_IPV6_V6ONLY(inp6))
2157                                         continue;
2158
2159                                 sin = &ifa->address.sin;
2160                                 if (sin->sin_addr.s_addr == 0) {
2161                                         /* we skip unspecifed addresses */
2162                                         continue;
2163                                 }
2164                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2165                                     &sin->sin_addr) != 0) {
2166                                         continue;
2167                                 }
2168                                 if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2169                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2170                                         continue;
2171                                 }
2172                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2173                                     SCTP_IPV6_V6ONLY(inp6)) {
2174                                         cnt_invalid++;
2175                                         if (asc->cnt == cnt_invalid)
2176                                                 return;
2177                                         else
2178                                                 continue;
2179                                 }
2180                                 break;
2181                         }
2182 #endif
2183                 default:
2184                         /* invalid address family */
2185                         cnt_invalid++;
2186                         if (asc->cnt == cnt_invalid)
2187                                 return;
2188                         else
2189                                 continue;
2190                         break;
2191                 }
2192
2193                 if (type == SCTP_ADD_IP_ADDRESS) {
2194                         /* prevent this address from being used as a source */
2195                         sctp_add_local_addr_restricted(stcb, ifa);
2196                 } else if (type == SCTP_DEL_IP_ADDRESS) {
2197                         struct sctp_nets *net;
2198
2199                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2200                                 sctp_rtentry_t *rt;
2201
2202                                 /* delete this address if cached */
2203                                 if (net->ro._s_addr == ifa) {
2204                                         sctp_free_ifa(net->ro._s_addr);
2205                                         net->ro._s_addr = NULL;
2206                                         net->src_addr_selected = 0;
2207                                         rt = net->ro.ro_rt;
2208                                         if (rt) {
2209                                                 RTFREE(rt);
2210                                                 net->ro.ro_rt = NULL;
2211                                         }
2212                                         /*
2213                                          * Now we deleted our src address,
2214                                          * should we not also now reset the
2215                                          * cwnd/rto to start as if its a new
2216                                          * address?
2217                                          */
2218                                         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2219                                         net->RTO = 0;
2220
2221                                 }
2222                         }
2223                 } else if (type == SCTP_SET_PRIM_ADDR) {
2224                         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2225                                 /* must validate the ifa is in the ep */
2226                                 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2227                                         continue;
2228                                 }
2229                         } else {
2230                                 /* Need to check scopes for this guy */
2231                                 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2232                                         continue;
2233                                 }
2234                         }
2235                 }
2236                 /* queue an asconf for this address add/delete */
2237                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2238                     stcb->asoc.asconf_supported == 1) {
2239                         /* queue an asconf for this addr */
2240                         status = sctp_asconf_queue_add(stcb, ifa, type);
2241                         /*
2242                          * if queued ok, and in the open state, update the
2243                          * count of queued params.  If in the non-open
2244                          * state, these get sent when the assoc goes open.
2245                          */
2246                         if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2247                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2248                                 if (status >= 0) {
2249                                         num_queued++;
2250                                 }
2251                         }
2252                 }
2253         }
2254         /*
2255          * If we have queued params in the open state, send out an ASCONF.
2256          */
2257         if (num_queued > 0) {
2258                 sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2259         }
2260 }
2261
2262 void
2263 sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED)
2264 {
2265         struct sctp_asconf_iterator *asc;
2266         struct sctp_ifa *ifa;
2267         struct sctp_laddr *l, *nl;
2268
2269         asc = (struct sctp_asconf_iterator *)ptr;
2270         LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) {
2271                 ifa = l->ifa;
2272                 if (l->action == SCTP_ADD_IP_ADDRESS) {
2273                         /* Clear the defer use flag */
2274                         ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2275                 }
2276                 sctp_free_ifa(ifa);
2277                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2278                 SCTP_DECR_LADDR_COUNT();
2279         }
2280         SCTP_FREE(asc, SCTP_M_ASC_IT);
2281 }
2282
2283 /*
2284  * sa is the sockaddr to ask the peer to set primary to.
2285  * returns: 0 = completed, -1 = error
2286  */
2287 int32_t
2288 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2289 {
2290         uint32_t vrf_id;
2291         struct sctp_ifa *ifa;
2292
2293         /* find the ifa for the desired set primary */
2294         vrf_id = stcb->asoc.vrf_id;
2295         ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2296         if (ifa == NULL) {
2297                 /* Invalid address */
2298                 return (-1);
2299         }
2300
2301         /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2302         if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2303                 /* set primary queuing succeeded */
2304                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2305                     "set_primary_ip_address_sa: queued on tcb=%p, ",
2306                     (void *)stcb);
2307                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2308                 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
2309                     (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2310 #ifdef SCTP_TIMER_BASED_ASCONF
2311                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2312                             stcb->sctp_ep, stcb,
2313                             stcb->asoc.primary_destination);
2314 #else
2315                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2316 #endif
2317                 }
2318         } else {
2319                 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2320                     (void *)stcb);
2321                 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2322                 return (-1);
2323         }
2324         return (0);
2325 }
2326
2327 int
2328 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2329 {
2330         struct sctp_tmit_chunk *chk, *nchk;
2331         unsigned int offset, asconf_limit;
2332         struct sctp_asconf_chunk *acp;
2333         struct sctp_asconf_paramhdr *aph;
2334         uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2335         struct sctp_paramhdr *ph;
2336         int add_cnt, del_cnt;
2337         uint16_t last_param_type;
2338
2339         add_cnt = del_cnt = 0;
2340         last_param_type = 0;
2341         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) {
2342                 if (chk->data == NULL) {
2343                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2344                         continue;
2345                 }
2346                 offset = 0;
2347                 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2348                 offset += sizeof(struct sctp_asconf_chunk);
2349                 asconf_limit = ntohs(acp->ch.chunk_length);
2350                 ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2351                 if (ph == NULL) {
2352                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2353                         continue;
2354                 }
2355                 offset += ntohs(ph->param_length);
2356
2357                 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2358                 if (aph == NULL) {
2359                         SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2360                         continue;
2361                 }
2362                 while (aph != NULL) {
2363                         unsigned int param_length, param_type;
2364
2365                         param_type = ntohs(aph->ph.param_type);
2366                         param_length = ntohs(aph->ph.param_length);
2367                         if (offset + param_length > asconf_limit) {
2368                                 /* parameter goes beyond end of chunk! */
2369                                 break;
2370                         }
2371                         if (param_length > sizeof(aparam_buf)) {
2372                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2373                                 break;
2374                         }
2375                         if (param_length <= sizeof(struct sctp_paramhdr)) {
2376                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2377                                 break;
2378                         }
2379
2380                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2381                         if (aph == NULL) {
2382                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2383                                 break;
2384                         }
2385
2386                         ph = (struct sctp_paramhdr *)(aph + 1);
2387                         if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) {
2388                                 switch (param_type) {
2389                                 case SCTP_ADD_IP_ADDRESS:
2390                                         add_cnt++;
2391                                         break;
2392                                 case SCTP_DEL_IP_ADDRESS:
2393                                         del_cnt++;
2394                                         break;
2395                                 default:
2396                                         break;
2397                                 }
2398                                 last_param_type = param_type;
2399                         }
2400
2401                         offset += SCTP_SIZE32(param_length);
2402                         if (offset >= asconf_limit) {
2403                                 /* no more data in the mbuf chain */
2404                                 break;
2405                         }
2406                         /* get pointer to next asconf param */
2407                         aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2408                 }
2409         }
2410
2411         /*
2412          * we want to find the sequences which consist of ADD -> DEL -> ADD
2413          * or DEL -> ADD
2414          */
2415         if (add_cnt > del_cnt ||
2416             (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2417                 return (1);
2418         }
2419         return (0);
2420 }
2421
2422 static struct sockaddr *
2423 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2424 {
2425         struct sctp_vrf *vrf = NULL;
2426         struct sctp_ifn *sctp_ifn;
2427         struct sctp_ifa *sctp_ifa;
2428
2429         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2430                 SCTP_IPI_ADDR_RLOCK();
2431         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2432         if (vrf == NULL) {
2433                 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2434                         SCTP_IPI_ADDR_RUNLOCK();
2435                 return (NULL);
2436         }
2437         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2438                 if (stcb->asoc.scope.loopback_scope == 0 &&
2439                     SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2440                         /* Skip if loopback_scope not set */
2441                         continue;
2442                 }
2443                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2444                         switch (sctp_ifa->address.sa.sa_family) {
2445 #ifdef INET
2446                         case AF_INET:
2447                                 if (stcb->asoc.scope.ipv4_addr_legal) {
2448                                         struct sockaddr_in *sin;
2449
2450                                         sin = &sctp_ifa->address.sin;
2451                                         if (sin->sin_addr.s_addr == 0) {
2452                                                 /* skip unspecifed addresses */
2453                                                 continue;
2454                                         }
2455                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
2456                                             &sin->sin_addr) != 0) {
2457                                                 continue;
2458                                         }
2459                                         if (stcb->asoc.scope.ipv4_local_scope == 0 &&
2460                                             IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2461                                                 continue;
2462
2463                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2464                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2465                                                 continue;
2466                                         /*
2467                                          * found a valid local v4 address to
2468                                          * use
2469                                          */
2470                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2471                                                 SCTP_IPI_ADDR_RUNLOCK();
2472                                         return (&sctp_ifa->address.sa);
2473                                 }
2474                                 break;
2475 #endif
2476 #ifdef INET6
2477                         case AF_INET6:
2478                                 if (stcb->asoc.scope.ipv6_addr_legal) {
2479                                         struct sockaddr_in6 *sin6;
2480
2481                                         if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2482                                                 continue;
2483                                         }
2484
2485                                         sin6 = &sctp_ifa->address.sin6;
2486                                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2487                                                 /*
2488                                                  * we skip unspecifed
2489                                                  * addresses
2490                                                  */
2491                                                 continue;
2492                                         }
2493                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
2494                                             &sin6->sin6_addr) != 0) {
2495                                                 continue;
2496                                         }
2497                                         if (stcb->asoc.scope.local_scope == 0 &&
2498                                             IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2499                                                 continue;
2500                                         if (stcb->asoc.scope.site_scope == 0 &&
2501                                             IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2502                                                 continue;
2503
2504                                         if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2505                                             (!sctp_is_addr_pending(stcb, sctp_ifa)))
2506                                                 continue;
2507                                         /*
2508                                          * found a valid local v6 address to
2509                                          * use
2510                                          */
2511                                         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2512                                                 SCTP_IPI_ADDR_RUNLOCK();
2513                                         return (&sctp_ifa->address.sa);
2514                                 }
2515                                 break;
2516 #endif
2517                         default:
2518                                 break;
2519                         }
2520                 }
2521         }
2522         /* no valid addresses found */
2523         if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2524                 SCTP_IPI_ADDR_RUNLOCK();
2525         return (NULL);
2526 }
2527
2528 static struct sockaddr *
2529 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2530 {
2531         struct sctp_laddr *laddr;
2532
2533         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2534                 if (laddr->ifa == NULL) {
2535                         continue;
2536                 }
2537                 /* is the address restricted ? */
2538                 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2539                     (!sctp_is_addr_pending(stcb, laddr->ifa)))
2540                         continue;
2541
2542                 /* found a valid local address to use */
2543                 return (&laddr->ifa->address.sa);
2544         }
2545         /* no valid addresses found */
2546         return (NULL);
2547 }
2548
2549 /*
2550  * builds an ASCONF chunk from queued ASCONF params.
2551  * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2552  */
2553 struct mbuf *
2554 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2555 {
2556         struct mbuf *m_asconf, *m_asconf_chk;
2557         struct sctp_asconf_addr *aa;
2558         struct sctp_asconf_chunk *acp;
2559         struct sctp_asconf_paramhdr *aph;
2560         struct sctp_asconf_addr_param *aap;
2561         uint32_t p_length;
2562         uint32_t correlation_id = 1;    /* 0 is reserved... */
2563         caddr_t ptr, lookup_ptr;
2564         uint8_t lookup_used = 0;
2565
2566         /* are there any asconf params to send? */
2567         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2568                 if (aa->sent == 0)
2569                         break;
2570         }
2571         if (aa == NULL)
2572                 return (NULL);
2573
2574         /*
2575          * get a chunk header mbuf and a cluster for the asconf params since
2576          * it's simpler to fill in the asconf chunk header lookup address on
2577          * the fly
2578          */
2579         m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA);
2580         if (m_asconf_chk == NULL) {
2581                 /* no mbuf's */
2582                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2583                     "compose_asconf: couldn't get chunk mbuf!\n");
2584                 return (NULL);
2585         }
2586         m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
2587         if (m_asconf == NULL) {
2588                 /* no mbuf's */
2589                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2590                     "compose_asconf: couldn't get mbuf!\n");
2591                 sctp_m_freem(m_asconf_chk);
2592                 return (NULL);
2593         }
2594         SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2595         SCTP_BUF_LEN(m_asconf) = 0;
2596         acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2597         memset(acp, 0, sizeof(struct sctp_asconf_chunk));
2598         /* save pointers to lookup address and asconf params */
2599         lookup_ptr = (caddr_t)(acp + 1);        /* after the header */
2600         ptr = mtod(m_asconf, caddr_t);  /* beginning of cluster */
2601
2602         /* fill in chunk header info */
2603         acp->ch.chunk_type = SCTP_ASCONF;
2604         acp->ch.chunk_flags = 0;
2605         acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2606         stcb->asoc.asconf_seq_out++;
2607
2608         /* add parameters... up to smallest MTU allowed */
2609         TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2610                 if (aa->sent)
2611                         continue;
2612                 /* get the parameter length */
2613                 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2614                 /* will it fit in current chunk? */
2615                 if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) ||
2616                     (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) {
2617                         /* won't fit, so we're done with this chunk */
2618                         break;
2619                 }
2620                 /* assign (and store) a correlation id */
2621                 aa->ap.aph.correlation_id = correlation_id++;
2622
2623                 /*
2624                  * fill in address if we're doing a delete this is a simple
2625                  * way for us to fill in the correlation address, which
2626                  * should only be used by the peer if we're deleting our
2627                  * source address and adding a new address (e.g. renumbering
2628                  * case)
2629                  */
2630                 if (lookup_used == 0 &&
2631                     (aa->special_del == 0) &&
2632                     aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2633                         struct sctp_ipv6addr_param *lookup;
2634                         uint16_t p_size, addr_size;
2635
2636                         lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2637                         lookup->ph.param_type =
2638                             htons(aa->ap.addrp.ph.param_type);
2639                         if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2640                                 /* copy IPv6 address */
2641                                 p_size = sizeof(struct sctp_ipv6addr_param);
2642                                 addr_size = sizeof(struct in6_addr);
2643                         } else {
2644                                 /* copy IPv4 address */
2645                                 p_size = sizeof(struct sctp_ipv4addr_param);
2646                                 addr_size = sizeof(struct in_addr);
2647                         }
2648                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2649                         memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2650                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2651                         lookup_used = 1;
2652                 }
2653                 /* copy into current space */
2654                 memcpy(ptr, &aa->ap, p_length);
2655
2656                 /* network elements and update lengths */
2657                 aph = (struct sctp_asconf_paramhdr *)ptr;
2658                 aap = (struct sctp_asconf_addr_param *)ptr;
2659                 /* correlation_id is transparent to peer, no htonl needed */
2660                 aph->ph.param_type = htons(aph->ph.param_type);
2661                 aph->ph.param_length = htons(aph->ph.param_length);
2662                 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2663                 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2664
2665                 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2666                 ptr += SCTP_SIZE32(p_length);
2667
2668                 /*
2669                  * these params are removed off the pending list upon
2670                  * getting an ASCONF-ACK back from the peer, just set flag
2671                  */
2672                 aa->sent = 1;
2673         }
2674         /* check to see if the lookup addr has been populated yet */
2675         if (lookup_used == 0) {
2676                 /* NOTE: if the address param is optional, can skip this... */
2677                 /* add any valid (existing) address... */
2678                 struct sctp_ipv6addr_param *lookup;
2679                 uint16_t p_size, addr_size;
2680                 struct sockaddr *found_addr;
2681                 caddr_t addr_ptr;
2682
2683                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2684                         found_addr = sctp_find_valid_localaddr(stcb,
2685                             addr_locked);
2686                 else
2687                         found_addr = sctp_find_valid_localaddr_ep(stcb);
2688
2689                 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2690                 if (found_addr != NULL) {
2691                         switch (found_addr->sa_family) {
2692 #ifdef INET6
2693                         case AF_INET6:
2694                                 /* copy IPv6 address */
2695                                 lookup->ph.param_type =
2696                                     htons(SCTP_IPV6_ADDRESS);
2697                                 p_size = sizeof(struct sctp_ipv6addr_param);
2698                                 addr_size = sizeof(struct in6_addr);
2699                                 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2700                                     found_addr)->sin6_addr;
2701                                 break;
2702 #endif
2703 #ifdef INET
2704                         case AF_INET:
2705                                 /* copy IPv4 address */
2706                                 lookup->ph.param_type =
2707                                     htons(SCTP_IPV4_ADDRESS);
2708                                 p_size = sizeof(struct sctp_ipv4addr_param);
2709                                 addr_size = sizeof(struct in_addr);
2710                                 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2711                                     found_addr)->sin_addr;
2712                                 break;
2713 #endif
2714                         default:
2715                                 p_size = 0;
2716                                 addr_size = 0;
2717                                 addr_ptr = NULL;
2718                                 break;
2719                         }
2720                         lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2721                         memcpy(lookup->addr, addr_ptr, addr_size);
2722                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2723                 } else {
2724                         /* uh oh... don't have any address?? */
2725                         SCTPDBG(SCTP_DEBUG_ASCONF1,
2726                             "compose_asconf: no lookup addr!\n");
2727                         /* XXX for now, we send a IPv4 address of 0.0.0.0 */
2728                         lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2729                         lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2730                         memset(lookup->addr, 0, sizeof(struct in_addr));
2731                         SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2732                 }
2733         }
2734         /* chain it all together */
2735         SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2736         *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2737         acp->ch.chunk_length = htons(*retlen);
2738
2739         return (m_asconf_chk);
2740 }
2741
2742 /*
2743  * section to handle address changes before an association is up eg. changes
2744  * during INIT/INIT-ACK/COOKIE-ECHO handshake
2745  */
2746
2747 /*
2748  * processes the (local) addresses in the INIT-ACK chunk
2749  */
2750 static void
2751 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2752     unsigned int offset, unsigned int length)
2753 {
2754         struct sctp_paramhdr tmp_param, *ph;
2755         uint16_t plen, ptype;
2756         struct sctp_ifa *sctp_ifa;
2757         union sctp_sockstore store;
2758 #ifdef INET6
2759         struct sctp_ipv6addr_param addr6_store;
2760 #endif
2761 #ifdef INET
2762         struct sctp_ipv4addr_param addr4_store;
2763 #endif
2764
2765         SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2766         if (stcb == NULL)       /* Un-needed check for SA */
2767                 return;
2768
2769         /* convert to upper bound */
2770         length += offset;
2771
2772         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2773                 return;
2774         }
2775         /* go through the addresses in the init-ack */
2776         ph = (struct sctp_paramhdr *)
2777             sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2778             (uint8_t *)&tmp_param);
2779         while (ph != NULL) {
2780                 ptype = ntohs(ph->param_type);
2781                 plen = ntohs(ph->param_length);
2782                 switch (ptype) {
2783 #ifdef INET6
2784                 case SCTP_IPV6_ADDRESS:
2785                         {
2786                                 struct sctp_ipv6addr_param *a6p;
2787
2788                                 /* get the entire IPv6 address param */
2789                                 a6p = (struct sctp_ipv6addr_param *)
2790                                     sctp_m_getptr(m, offset,
2791                                     sizeof(struct sctp_ipv6addr_param),
2792                                     (uint8_t *)&addr6_store);
2793                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2794                                     a6p == NULL) {
2795                                         return;
2796                                 }
2797                                 memset(&store, 0, sizeof(union sctp_sockstore));
2798                                 store.sin6.sin6_family = AF_INET6;
2799                                 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2800                                 store.sin6.sin6_port = stcb->rport;
2801                                 memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr));
2802                                 break;
2803                         }
2804 #endif
2805 #ifdef INET
2806                 case SCTP_IPV4_ADDRESS:
2807                         {
2808                                 struct sctp_ipv4addr_param *a4p;
2809
2810                                 /* get the entire IPv4 address param */
2811                                 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2812                                     sizeof(struct sctp_ipv4addr_param),
2813                                     (uint8_t *)&addr4_store);
2814                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2815                                     a4p == NULL) {
2816                                         return;
2817                                 }
2818                                 memset(&store, 0, sizeof(union sctp_sockstore));
2819                                 store.sin.sin_family = AF_INET;
2820                                 store.sin.sin_len = sizeof(struct sockaddr_in);
2821                                 store.sin.sin_port = stcb->rport;
2822                                 store.sin.sin_addr.s_addr = a4p->addr;
2823                                 break;
2824                         }
2825 #endif
2826                 default:
2827                         goto next_addr;
2828                 }
2829
2830                 /* see if this address really (still) exists */
2831                 sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id,
2832                     SCTP_ADDR_NOT_LOCKED);
2833                 if (sctp_ifa == NULL) {
2834                         /* address doesn't exist anymore */
2835                         int status;
2836
2837                         /* are ASCONFs allowed ? */
2838                         if ((sctp_is_feature_on(stcb->sctp_ep,
2839                             SCTP_PCB_FLAGS_DO_ASCONF)) &&
2840                             stcb->asoc.asconf_supported) {
2841                                 /* queue an ASCONF DEL_IP_ADDRESS */
2842                                 status = sctp_asconf_queue_sa_delete(stcb, &store.sa);
2843                                 /*
2844                                  * if queued ok, and in correct state, send
2845                                  * out the ASCONF.
2846                                  */
2847                                 if (status == 0 &&
2848                                     SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
2849 #ifdef SCTP_TIMER_BASED_ASCONF
2850                                         sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2851                                             stcb->sctp_ep, stcb,
2852                                             stcb->asoc.primary_destination);
2853 #else
2854                                         sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED);
2855 #endif
2856                                 }
2857                         }
2858                 }
2859
2860 next_addr:
2861                 /*
2862                  * Sanity check:  Make sure the length isn't 0, otherwise
2863                  * we'll be stuck in this loop for a long time...
2864                  */
2865                 if (SCTP_SIZE32(plen) == 0) {
2866                         SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2867                             plen, ptype);
2868                         return;
2869                 }
2870                 /* get next parameter */
2871                 offset += SCTP_SIZE32(plen);
2872                 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2873                         return;
2874                 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2875                     sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2876         }                       /* while */
2877 }
2878
2879 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2880 /*
2881  * checks to see if a specific address is in the initack address list returns
2882  * 1 if found, 0 if not
2883  */
2884 static uint32_t
2885 sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa)
2886 {
2887         struct sctp_paramhdr tmp_param, *ph;
2888         uint16_t plen, ptype;
2889 #ifdef INET
2890         struct sockaddr_in *sin;
2891         struct sctp_ipv4addr_param *a4p;
2892         struct sctp_ipv6addr_param addr4_store;
2893 #endif
2894 #ifdef INET6
2895         struct sockaddr_in6 *sin6;
2896         struct sctp_ipv6addr_param *a6p;
2897         struct sctp_ipv6addr_param addr6_store;
2898         struct sockaddr_in6 sin6_tmp;
2899 #endif
2900
2901         switch (sa->sa_family) {
2902 #ifdef INET
2903         case AF_INET:
2904                 break;
2905 #endif
2906 #ifdef INET6
2907         case AF_INET6:
2908                 break;
2909 #endif
2910         default:
2911                 return (0);
2912         }
2913
2914         SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2915         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2916         /* convert to upper bound */
2917         length += offset;
2918
2919         if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2920                 SCTPDBG(SCTP_DEBUG_ASCONF1,
2921                     "find_initack_addr: invalid offset?\n");
2922                 return (0);
2923         }
2924         /* go through the addresses in the init-ack */
2925         ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2926             sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2927         while (ph != NULL) {
2928                 ptype = ntohs(ph->param_type);
2929                 plen = ntohs(ph->param_length);
2930                 switch (ptype) {
2931 #ifdef INET6
2932                 case SCTP_IPV6_ADDRESS:
2933                         if (sa->sa_family == AF_INET6) {
2934                                 /* get the entire IPv6 address param */
2935                                 if (plen != sizeof(struct sctp_ipv6addr_param)) {
2936                                         break;
2937                                 }
2938                                 /* get the entire IPv6 address param */
2939                                 a6p = (struct sctp_ipv6addr_param *)
2940                                     sctp_m_getptr(m, offset,
2941                                     sizeof(struct sctp_ipv6addr_param),
2942                                     (uint8_t *)&addr6_store);
2943                                 if (a6p == NULL) {
2944                                         return (0);
2945                                 }
2946                                 sin6 = (struct sockaddr_in6 *)sa;
2947                                 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2948                                         /* create a copy and clear scope */
2949                                         memcpy(&sin6_tmp, sin6,
2950                                             sizeof(struct sockaddr_in6));
2951                                         sin6 = &sin6_tmp;
2952                                         in6_clearscope(&sin6->sin6_addr);
2953                                 }
2954                                 if (memcmp(&sin6->sin6_addr, a6p->addr,
2955                                     sizeof(struct in6_addr)) == 0) {
2956                                         /* found it */
2957                                         return (1);
2958                                 }
2959                         }
2960                         break;
2961 #endif                          /* INET6 */
2962 #ifdef INET
2963                 case SCTP_IPV4_ADDRESS:
2964                         if (sa->sa_family == AF_INET) {
2965                                 if (plen != sizeof(struct sctp_ipv4addr_param)) {
2966                                         break;
2967                                 }
2968                                 /* get the entire IPv4 address param */
2969                                 a4p = (struct sctp_ipv4addr_param *)
2970                                     sctp_m_getptr(m, offset,
2971                                     sizeof(struct sctp_ipv4addr_param),
2972                                     (uint8_t *)&addr4_store);
2973                                 if (a4p == NULL) {
2974                                         return (0);
2975                                 }
2976                                 sin = (struct sockaddr_in *)sa;
2977                                 if (sin->sin_addr.s_addr == a4p->addr) {
2978                                         /* found it */
2979                                         return (1);
2980                                 }
2981                         }
2982                         break;
2983 #endif
2984                 default:
2985                         break;
2986                 }
2987                 /* get next parameter */
2988                 offset += SCTP_SIZE32(plen);
2989                 if (offset + sizeof(struct sctp_paramhdr) > length) {
2990                         return (0);
2991                 }
2992                 ph = (struct sctp_paramhdr *)
2993                     sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2994                     (uint8_t *)&tmp_param);
2995         }                       /* while */
2996         /* not found! */
2997         return (0);
2998 }
2999
3000 /*
3001  * makes sure that the current endpoint local addr list is consistent with
3002  * the new association (eg. subset bound, asconf allowed) adds addresses as
3003  * necessary
3004  */
3005 static void
3006 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3007     int length, struct sockaddr *init_addr)
3008 {
3009         struct sctp_laddr *laddr;
3010
3011         /* go through the endpoint list */
3012         LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3013                 /* be paranoid and validate the laddr */
3014                 if (laddr->ifa == NULL) {
3015                         SCTPDBG(SCTP_DEBUG_ASCONF1,
3016                             "check_addr_list_ep: laddr->ifa is NULL");
3017                         continue;
3018                 }
3019                 if (laddr->ifa == NULL) {
3020                         SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3021                         continue;
3022                 }
3023                 /* do i have it implicitly? */
3024                 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3025                         continue;
3026                 }
3027                 /* check to see if in the init-ack */
3028                 if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) {
3029                         /* try to add it */
3030                         sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3031                             SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3032                 }
3033         }
3034 }
3035
3036 /*
3037  * makes sure that the current kernel address list is consistent with the new
3038  * association (with all addrs bound) adds addresses as necessary
3039  */
3040 static void
3041 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3042     int length, struct sockaddr *init_addr,
3043     uint16_t local_scope, uint16_t site_scope,
3044     uint16_t ipv4_scope, uint16_t loopback_scope)
3045 {
3046         struct sctp_vrf *vrf = NULL;
3047         struct sctp_ifn *sctp_ifn;
3048         struct sctp_ifa *sctp_ifa;
3049         uint32_t vrf_id;
3050 #ifdef INET
3051         struct sockaddr_in *sin;
3052 #endif
3053 #ifdef INET6
3054         struct sockaddr_in6 *sin6;
3055 #endif
3056
3057         if (stcb) {
3058                 vrf_id = stcb->asoc.vrf_id;
3059         } else {
3060                 return;
3061         }
3062         SCTP_IPI_ADDR_RLOCK();
3063         vrf = sctp_find_vrf(vrf_id);
3064         if (vrf == NULL) {
3065                 SCTP_IPI_ADDR_RUNLOCK();
3066                 return;
3067         }
3068         /* go through all our known interfaces */
3069         LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3070                 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3071                         /* skip loopback interface */
3072                         continue;
3073                 }
3074                 /* go through each interface address */
3075                 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3076                         /* do i have it implicitly? */
3077                         if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3078                                 continue;
3079                         }
3080                         switch (sctp_ifa->address.sa.sa_family) {
3081 #ifdef INET
3082                         case AF_INET:
3083                                 sin = &sctp_ifa->address.sin;
3084                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3085                                     &sin->sin_addr) != 0) {
3086                                         continue;
3087                                 }
3088                                 if ((ipv4_scope == 0) &&
3089                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
3090                                         /* private address not in scope */
3091                                         continue;
3092                                 }
3093                                 break;
3094 #endif
3095 #ifdef INET6
3096                         case AF_INET6:
3097                                 sin6 = &sctp_ifa->address.sin6;
3098                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3099                                     &sin6->sin6_addr) != 0) {
3100                                         continue;
3101                                 }
3102                                 if ((local_scope == 0) &&
3103                                     (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
3104                                         continue;
3105                                 }
3106                                 if ((site_scope == 0) &&
3107                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
3108                                         continue;
3109                                 }
3110                                 break;
3111 #endif
3112                         default:
3113                                 break;
3114                         }
3115                         /* check to see if in the init-ack */
3116                         if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) {
3117                                 /* try to add it */
3118                                 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3119                                     sctp_ifa, SCTP_ADD_IP_ADDRESS,
3120                                     SCTP_ADDR_LOCKED);
3121                         }
3122                 }               /* end foreach ifa */
3123         }                       /* end foreach ifn */
3124         SCTP_IPI_ADDR_RUNLOCK();
3125 }
3126
3127 /*
3128  * validates an init-ack chunk (from a cookie-echo) with current addresses
3129  * adds addresses from the init-ack into our local address list, if needed
3130  * queues asconf adds/deletes addresses as needed and makes appropriate list
3131  * changes for source address selection m, offset: points to the start of the
3132  * address list in an init-ack chunk length: total length of the address
3133  * params only init_addr: address where my INIT-ACK was sent from
3134  */
3135 void
3136 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3137     int length, struct sockaddr *init_addr,
3138     uint16_t local_scope, uint16_t site_scope,
3139     uint16_t ipv4_scope, uint16_t loopback_scope)
3140 {
3141         /* process the local addresses in the initack */
3142         sctp_process_initack_addresses(stcb, m, offset, length);
3143
3144         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3145                 /* bound all case */
3146                 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3147                     local_scope, site_scope, ipv4_scope, loopback_scope);
3148         } else {
3149                 /* subset bound case */
3150                 if (sctp_is_feature_on(stcb->sctp_ep,
3151                     SCTP_PCB_FLAGS_DO_ASCONF)) {
3152                         /* asconf's allowed */
3153                         sctp_check_address_list_ep(stcb, m, offset, length,
3154                             init_addr);
3155                 }
3156                 /* else, no asconfs allowed, so what we sent is what we get */
3157         }
3158 }
3159
3160 /*
3161  * sctp_bindx() support
3162  */
3163 uint32_t
3164 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3165     uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3166 {
3167         struct sctp_ifa *ifa;
3168         struct sctp_laddr *laddr, *nladdr;
3169
3170         if (sa->sa_len == 0) {
3171                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3172                 return (EINVAL);
3173         }
3174         if (sctp_ifap) {
3175                 ifa = sctp_ifap;
3176         } else if (type == SCTP_ADD_IP_ADDRESS) {
3177                 /* For an add the address MUST be on the system */
3178                 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3179         } else if (type == SCTP_DEL_IP_ADDRESS) {
3180                 /* For a delete we need to find it in the inp */
3181                 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3182         } else {
3183                 ifa = NULL;
3184         }
3185         if (ifa != NULL) {
3186                 if (type == SCTP_ADD_IP_ADDRESS) {
3187                         sctp_add_local_addr_ep(inp, ifa, type);
3188                 } else if (type == SCTP_DEL_IP_ADDRESS) {
3189                         if (inp->laddr_count < 2) {
3190                                 /* can't delete the last local address */
3191                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3192                                 return (EINVAL);
3193                         }
3194                         LIST_FOREACH(laddr, &inp->sctp_addr_list,
3195                             sctp_nxt_addr) {
3196                                 if (ifa == laddr->ifa) {
3197                                         /* Mark in the delete */
3198                                         laddr->action = type;
3199                                 }
3200                         }
3201                 }
3202                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3203                         /*
3204                          * There is no need to start the iterator if the inp
3205                          * has no associations.
3206                          */
3207                         if (type == SCTP_DEL_IP_ADDRESS) {
3208                                 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3209                                         if (laddr->ifa == ifa) {
3210                                                 sctp_del_local_addr_ep(inp, ifa);
3211                                         }
3212                                 }
3213                         }
3214                 } else {
3215                         struct sctp_asconf_iterator *asc;
3216                         struct sctp_laddr *wi;
3217                         int ret;
3218
3219                         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3220                             sizeof(struct sctp_asconf_iterator),
3221                             SCTP_M_ASC_IT);
3222                         if (asc == NULL) {
3223                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3224                                 return (ENOMEM);
3225                         }
3226                         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3227                         if (wi == NULL) {
3228                                 SCTP_FREE(asc, SCTP_M_ASC_IT);
3229                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3230                                 return (ENOMEM);
3231                         }
3232                         LIST_INIT(&asc->list_of_work);
3233                         asc->cnt = 1;
3234                         SCTP_INCR_LADDR_COUNT();
3235                         wi->ifa = ifa;
3236                         wi->action = type;
3237                         atomic_add_int(&ifa->refcount, 1);
3238                         LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3239                         ret = sctp_initiate_iterator(sctp_asconf_iterator_ep,
3240                             sctp_asconf_iterator_stcb,
3241                             sctp_asconf_iterator_ep_end,
3242                             SCTP_PCB_ANY_FLAGS,
3243                             SCTP_PCB_ANY_FEATURES,
3244                             SCTP_ASOC_ANY_STATE,
3245                             (void *)asc, 0,
3246                             sctp_asconf_iterator_end, inp, 0);
3247                         if (ret) {
3248                                 SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n");
3249                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT);
3250                                 sctp_asconf_iterator_end(asc, 0);
3251                                 return (EFAULT);
3252                         }
3253                 }
3254                 return (0);
3255         } else {
3256                 /* invalid address! */
3257                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3258                 return (EADDRNOTAVAIL);
3259         }
3260 }
3261
3262 void
3263 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3264     struct sctp_nets *net)
3265 {
3266         struct sctp_asconf_addr *aa;
3267         struct sctp_ifa *sctp_ifap;
3268         struct sctp_asconf_tag_param *vtag;
3269 #ifdef INET
3270         struct sockaddr_in *to;
3271 #endif
3272 #ifdef INET6
3273         struct sockaddr_in6 *to6;
3274 #endif
3275         if (net == NULL) {
3276                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3277                 return;
3278         }
3279         if (stcb == NULL) {
3280                 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3281                 return;
3282         }
3283         /*
3284          * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3285          * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3286          */
3287         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3288             SCTP_M_ASC_ADDR);
3289         if (aa == NULL) {
3290                 /* didn't get memory */
3291                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3292                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3293                 return;
3294         }
3295         aa->special_del = 0;
3296         /* fill in asconf address parameter fields */
3297         /* top level elements are "networked" during send */
3298         aa->ifa = NULL;
3299         aa->sent = 0;           /* clear sent flag */
3300         vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3301         vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3302         vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3303         vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3304         vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3305         TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3306
3307         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3308             SCTP_M_ASC_ADDR);
3309         if (aa == NULL) {
3310                 /* didn't get memory */
3311                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3312                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3313                 return;
3314         }
3315         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3316         /* fill in asconf address parameter fields */
3317         /* ADD(0.0.0.0) */
3318         switch (net->ro._l_addr.sa.sa_family) {
3319 #ifdef INET
3320         case AF_INET:
3321                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3322                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3323                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3324                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3325                 /* No need to add an address, we are using 0.0.0.0 */
3326                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3327                 break;
3328 #endif
3329 #ifdef INET6
3330         case AF_INET6:
3331                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3332                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3333                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3334                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3335                 /* No need to add an address, we are using 0.0.0.0 */
3336                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3337                 break;
3338 #endif
3339         default:
3340                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3341                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3342                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3343                 return;
3344         }
3345         SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3346             SCTP_M_ASC_ADDR);
3347         if (aa == NULL) {
3348                 /* didn't get memory */
3349                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3350                     "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3351                 return;
3352         }
3353         memset(aa, 0, sizeof(struct sctp_asconf_addr));
3354         /* fill in asconf address parameter fields */
3355         /* ADD(0.0.0.0) */
3356         switch (net->ro._l_addr.sa.sa_family) {
3357 #ifdef INET
3358         case AF_INET:
3359                 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3360                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3361                 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3362                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3363                 /* No need to add an address, we are using 0.0.0.0 */
3364                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3365                 break;
3366 #endif
3367 #ifdef INET6
3368         case AF_INET6:
3369                 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3370                 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3371                 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3372                 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3373                 /* No need to add an address, we are using 0.0.0.0 */
3374                 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3375                 break;
3376 #endif
3377         default:
3378                 SCTPDBG(SCTP_DEBUG_ASCONF1,
3379                     "sctp_asconf_send_nat_state_update: unknown address family\n");
3380                 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
3381                 return;
3382         }
3383         /* Now we must hunt the addresses and add all global addresses */
3384         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3385                 struct sctp_vrf *vrf = NULL;
3386                 struct sctp_ifn *sctp_ifnp;
3387                 uint32_t vrf_id;
3388
3389                 vrf_id = stcb->sctp_ep->def_vrf_id;
3390                 vrf = sctp_find_vrf(vrf_id);
3391                 if (vrf == NULL) {
3392                         goto skip_rest;
3393                 }
3394
3395                 SCTP_IPI_ADDR_RLOCK();
3396                 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3397                         LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3398                                 switch (sctp_ifap->address.sa.sa_family) {
3399 #ifdef INET
3400                                 case AF_INET:
3401                                         to = &sctp_ifap->address.sin;
3402                                         if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
3403                                             &to->sin_addr) != 0) {
3404                                                 continue;
3405                                         }
3406                                         if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3407                                                 continue;
3408                                         }
3409                                         if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3410                                                 continue;
3411                                         }
3412                                         break;
3413 #endif
3414 #ifdef INET6
3415                                 case AF_INET6:
3416                                         to6 = &sctp_ifap->address.sin6;
3417                                         if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
3418                                             &to6->sin6_addr) != 0) {
3419                                                 continue;
3420                                         }
3421                                         if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3422                                                 continue;
3423                                         }
3424                                         if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3425                                                 continue;
3426                                         }
3427                                         break;
3428 #endif
3429                                 default:
3430                                         continue;
3431                                 }
3432                                 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3433                         }
3434                 }
3435                 SCTP_IPI_ADDR_RUNLOCK();
3436         } else {
3437                 struct sctp_laddr *laddr;
3438
3439                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3440                         if (laddr->ifa == NULL) {
3441                                 continue;
3442                         }
3443                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3444                                 /*
3445                                  * Address being deleted by the system, dont
3446                                  * list.
3447                                  */
3448                                 continue;
3449                         if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3450                                 /*
3451                                  * Address being deleted on this ep don't
3452                                  * list.
3453                                  */
3454                                 continue;
3455                         }
3456                         sctp_ifap = laddr->ifa;
3457                         switch (sctp_ifap->address.sa.sa_family) {
3458 #ifdef INET
3459                         case AF_INET:
3460                                 to = &sctp_ifap->address.sin;
3461                                 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3462                                         continue;
3463                                 }
3464                                 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3465                                         continue;
3466                                 }
3467                                 break;
3468 #endif
3469 #ifdef INET6
3470                         case AF_INET6:
3471                                 to6 = &sctp_ifap->address.sin6;
3472                                 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3473                                         continue;
3474                                 }
3475                                 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3476                                         continue;
3477                                 }
3478                                 break;
3479 #endif
3480                         default:
3481                                 continue;
3482                         }
3483                         sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3484                 }
3485         }
3486 skip_rest:
3487         /* Now we must send the asconf into the queue */
3488         sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
3489 }