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