sys/netinet/sctp_pcb.c

   1 /*      $KAME: sctp_pcb.c,v 1.37 2004/08/17 06:28:02 t-momose Exp $     */
   2 /*      $DragonFly: src/sys/netinet/sctp_pcb.c,v 1.14 2008/03/07 11:34:20 sephe Exp $   */
   3
   4 /*
   5  * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
   6  * 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
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Cisco Systems, Inc.
  19  * 4. Neither the name of the project nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35 #if !(defined(__OpenBSD__) || defined(__APPLE__))
  36 #include "opt_ipsec.h"
  37 #endif
  38 #if defined(__FreeBSD__) || defined(__DragonFly__)
  39 #include "opt_compat.h"
  40 #include "opt_inet6.h"
  41 #include "opt_inet.h"
  42 #endif
  43 #if defined(__NetBSD__)
  44 #include "opt_inet.h"
  45 #endif
  46 #ifdef __APPLE__
  47 #include <sctp.h>
  48 #elif !defined(__OpenBSD__)
  49 #include "opt_sctp.h"
  50 #endif
  51
  52 #include <sys/param.h>
  53 #include <sys/systm.h>
  54 #include <sys/malloc.h>
  55 #include <sys/mbuf.h>
  56 #include <sys/domain.h>
  57 #include <sys/protosw.h>
  58 #include <sys/socket.h>
  59 #include <sys/socketvar.h>
  60 #include <sys/proc.h>
  61 #include <sys/priv.h>
  62 #include <sys/kernel.h>
  63 #include <sys/sysctl.h>
  64 #include <sys/thread2.h>
  65 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
  66 #include <sys/random.h>
  67 #endif
  68 #if defined(__NetBSD__)
  69 #include <sys/rnd.h>
  70 #endif
  71 #if defined(__OpenBSD__)
  72 #include <dev/rndvar.h>
  73 #endif
  74
  75 #if defined(__APPLE__)
  76 #include <netinet/sctp_callout.h>
  77 #elif defined(__OpenBSD__)
  78 #include <sys/timeout.h>
  79 #else
  80 #include <sys/callout.h>
  81 #endif
  82
  83 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000)
  84 #include <sys/limits.h>
  85 #else
  86 #include <machine/limits.h>
  87 #endif
  88 #include <machine/cpu.h>
  89
  90 #include <net/if.h>
  91 #include <net/if_types.h>
  92 #include <net/route.h>
  93 #include <netinet/in.h>
  94 #include <netinet/in_systm.h>
  95 #include <netinet/ip.h>
  96 #include <netinet/in_pcb.h>
  97 #include <netinet/in_var.h>
  98 #include <netinet/ip_var.h>
  99
 100 #ifdef INET6
 101 #include <netinet/ip6.h>
 102 #include <netinet6/ip6_var.h>
 103 #include <netinet6/scope6_var.h>
 104 #if defined(__FreeBSD__) || (__NetBSD__) || defined(__DragonFly__)
 105 #include <netinet6/in6_pcb.h>
 106 #elif defined(__OpenBSD__)
 107 #include <netinet/in_pcb.h>
 108 #endif
 109 #endif /* INET6 */
 110
 111 #ifdef IPSEC
 112 #ifndef __OpenBSD__
 113 #include <netinet6/ipsec.h>
 114 #include <netproto/key/key.h>
 115 #else
 116 #undef IPSEC
 117 #endif
 118 #endif /* IPSEC */
 119
 120 #include <netinet/sctp_var.h>
 121 #include <netinet/sctp_pcb.h>
 122 #include <netinet/sctputil.h>
 123 #include <netinet/sctp.h>
 124 #include <netinet/sctp_header.h>
 125 #include <netinet/sctp_asconf.h>
 126 #include <netinet/sctp_output.h>
 127 #include <netinet/sctp_timer.h>
 128
 129 #ifndef SCTP_PCBHASHSIZE
 130 /* default number of association hash buckets in each endpoint */
 131 #define SCTP_PCBHASHSIZE 256
 132 #endif
 133
 134 #ifdef SCTP_DEBUG
 135 u_int32_t sctp_debug_on = 0;
 136 #endif /* SCTP_DEBUG */
 137
 138 u_int32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];
 139
 140 int sctp_pcbtblsize = SCTP_PCBHASHSIZE;
 141
 142 struct sctp_epinfo sctppcbinfo;
 143
 144 /* FIX: we don't handle multiple link local scopes */
 145 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
 146 int
 147 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
 148 {
 149         struct in6_addr tmp_a, tmp_b;
 150         /* use a copy of a and b */
 151         tmp_a = *a;
 152         tmp_b = *b;
 153         in6_clearscope(&tmp_a);
 154         in6_clearscope(&tmp_b);
 155         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
 156 }
 157
 158 #ifdef __OpenBSD__
 159 extern int ipport_firstauto;
 160 extern int ipport_lastauto;
 161 extern int ipport_hifirstauto;
 162 extern int ipport_hilastauto;
 163 #endif
 164
 165 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
 166
 167 #ifndef xyzzy
 168 void sctp_validate_no_locks(void);
 169
 170 void
 171 SCTP_INP_RLOCK(struct sctp_inpcb *inp)
 172 {
 173         struct sctp_tcb *stcb;
 174         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 175                 if (mtx_owned(&(stcb)->tcb_mtx))
 176                         panic("I own TCB lock?");
 177         }
 178         if (mtx_owned(&(inp)->inp_mtx))
 179                 panic("INP Recursive Lock-R");
 180         mtx_lock(&(inp)->inp_mtx);
 181 }
 182
 183 void
 184 SCTP_INP_WLOCK(struct sctp_inpcb *inp)
 185 {
 186         SCTP_INP_RLOCK(inp);
 187 }
 188
 189 void
 190 SCTP_INP_INFO_RLOCK(void)
 191 {
 192         struct sctp_inpcb *inp;
 193         struct sctp_tcb *stcb;
 194         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
 195                 if (mtx_owned(&(inp)->inp_mtx))
 196                         panic("info-lock and own inp lock?");
 197                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 198                         if (mtx_owned(&(stcb)->tcb_mtx))
 199                                 panic("Info lock and own a tcb lock?");
 200                 }
 201         }
 202         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
 203                 panic("INP INFO Recursive Lock-R");
 204         mtx_lock(&sctppcbinfo.ipi_ep_mtx);
 205 }
 206
 207 void
 208 SCTP_INP_INFO_WLOCK(void)
 209 {
 210         SCTP_INP_INFO_RLOCK();
 211 }
 212
 213
 214 void sctp_validate_no_locks(void)
 215 {
 216         struct sctp_inpcb *inp;
 217         struct sctp_tcb *stcb;
 218
 219         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
 220                 panic("INP INFO lock is owned?");
 221
 222         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
 223                 if (mtx_owned(&(inp)->inp_mtx))
 224                         panic("You own an INP lock?");
 225                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 226                         if (mtx_owned(&(stcb)->tcb_mtx))
 227                                 panic("You own a TCB lock?");
 228                 }
 229         }
 230 }
 231
 232 #endif
 233 #endif
 234
 235 void
 236 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
 237 {
 238         /* We really don't need
 239          * to lock this, but I will
 240          * just because it does not hurt.
 241          */
 242         SCTP_INP_INFO_RLOCK();
 243         spcb->ep_count = sctppcbinfo.ipi_count_ep;
 244         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
 245         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
 246         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
 247         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
 248         spcb->sockq_count = sctppcbinfo.ipi_count_sockq;
 249         spcb->mbuf_track = sctppcbinfo.mbuf_track;
 250         SCTP_INP_INFO_RUNLOCK();
 251 }
 252
 253
 254 /*
 255  * Notes on locks for FreeBSD 5 and up. All association
 256  * lookups that have a definte ep, the INP structure is
 257  * assumed to be locked for reading. If we need to go
 258  * find the INP (ususally when a **inp is passed) then
 259  * we must lock the INFO structure first and if needed
 260  * lock the INP too. Note that if we lock it we must
 261  *
 262  */
 263
 264
 265 /*
 266  * Given a endpoint, look and find in its association list any association
 267  * with the "to" address given. This can be a "from" address, too, for
 268  * inbound packets. For outbound packets it is a true "to" address.
 269  */
 270 static struct sctp_tcb *
 271 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 272                         struct sockaddr *to, struct sctp_nets **netp)
 273 {
 274         /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
 275
 276         /*
 277          * Note for this module care must be taken when observing what to is
 278          * for. In most of the rest of the code the TO field represents my
 279          * peer and the FROM field represents my address. For this module it
 280          * is reversed of that.
 281          */
 282         /*
 283          * If we support the TCP model, then we must now dig through to
 284          * see if we can find our endpoint in the list of tcp ep's.
 285          */
 286         uint16_t lport, rport;
 287         struct sctppcbhead *ephead;
 288         struct sctp_inpcb *inp;
 289         struct sctp_laddr *laddr;
 290         struct sctp_tcb *stcb;
 291         struct sctp_nets *net;
 292
 293         if ((to == NULL) || (from == NULL)) {
 294                 return (NULL);
 295         }
 296
 297         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 298                 lport = ((struct sockaddr_in *)to)->sin_port;
 299                 rport = ((struct sockaddr_in *)from)->sin_port;
 300         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 301                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 302                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 303         } else {
 304                 return NULL;
 305         }
 306         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
 307                                                      (lport + rport), sctppcbinfo.hashtcpmark)];
 308         /*
 309          * Ok now for each of the guys in this bucket we must look
 310          * and see:
 311          *  - Does the remote port match.
 312          *  - Does there single association's addresses match this
 313          *    address (to).
 314          * If so we update p_ep to point to this ep and return the
 315          * tcb from it.
 316          */
 317         LIST_FOREACH(inp, ephead, sctp_hash) {
 318                 if (lport != inp->sctp_lport) {
 319                         continue;
 320                 }
 321                 SCTP_INP_RLOCK(inp);
 322                 /* check to see if the ep has one of the addresses */
 323                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 324                         /* We are NOT bound all, so look further */
 325                         int match = 0;
 326
 327                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 328                                 if (laddr->ifa == NULL) {
 329 #ifdef SCTP_DEBUG
 330                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 331                                                 kprintf("An ounce of prevention is worth a pound of cure\n");
 332                                         }
 333 #endif
 334                                         continue;
 335                                 }
 336                                 if (laddr->ifa->ifa_addr == NULL) {
 337 #ifdef SCTP_DEBUG
 338                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 339                                                 kprintf("ifa with a NULL address\n");
 340                                         }
 341 #endif
 342                                         continue;
 343                                 }
 344                                 if (laddr->ifa->ifa_addr->sa_family ==
 345                                     to->sa_family) {
 346                                         /* see if it matches */
 347                                         struct sockaddr_in *intf_addr, *sin;
 348                                         intf_addr = (struct sockaddr_in *)
 349                                                 laddr->ifa->ifa_addr;
 350                                         sin = (struct sockaddr_in *)to;
 351                                         if (from->sa_family == AF_INET) {
 352                                                 if (sin->sin_addr.s_addr ==
 353                                                     intf_addr->sin_addr.s_addr) {
 354                                                         match = 1;
 355                                                         SCTP_INP_RUNLOCK(inp);
 356                                                         break;
 357                                                 }
 358                                         } else {
 359                                                 struct sockaddr_in6 *intf_addr6;
 360                                                 struct sockaddr_in6 *sin6;
 361                                                 sin6 = (struct sockaddr_in6 *)
 362                                                         to;
 363                                                 intf_addr6 = (struct sockaddr_in6 *)
 364                                                         laddr->ifa->ifa_addr;
 365
 366                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 367                                                                          &intf_addr6->sin6_addr)) {
 368                                                         match = 1;
 369                                                         SCTP_INP_RUNLOCK(inp);
 370                                                         break;
 371                                                 }
 372                                         }
 373                                 }
 374                         }
 375                         if (match == 0) {
 376                                 /* This endpoint does not have this address */
 377                                 SCTP_INP_RUNLOCK(inp);
 378                                 continue;
 379                         }
 380                 }
 381                 /*
 382                  * Ok if we hit here the ep has the address, does it hold the
 383                  * tcb?
 384                  */
 385
 386                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 387                 if (stcb == NULL) {
 388                         SCTP_INP_RUNLOCK(inp);
 389                         continue;
 390                 }
 391                 SCTP_TCB_LOCK(stcb);
 392                 if (stcb->rport != rport) {
 393                         /* remote port does not match. */
 394                         SCTP_TCB_UNLOCK(stcb);
 395                         SCTP_INP_RUNLOCK(inp);
 396                         continue;
 397                 }
 398                 /* Does this TCB have a matching address? */
 399                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 400                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 401                                 /* not the same family, can't be a match */
 402                                 continue;
 403                         }
 404                         if (from->sa_family == AF_INET) {
 405                                 struct sockaddr_in *sin, *rsin;
 406                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
 407                                 rsin = (struct sockaddr_in *)from;
 408                                 if (sin->sin_addr.s_addr ==
 409                                     rsin->sin_addr.s_addr) {
 410                                         /* found it */
 411                                         if (netp != NULL) {
 412                                                 *netp = net;
 413                                         }
 414                                         /* Update the endpoint pointer */
 415                                         *inp_p = inp;
 416                                         SCTP_INP_RUNLOCK(inp);
 417                                         return (stcb);
 418                                 }
 419                         } else {
 420                                 struct sockaddr_in6 *sin6, *rsin6;
 421                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 422                                 rsin6 = (struct sockaddr_in6 *)from;
 423                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 424                                                          &rsin6->sin6_addr)) {
 425                                         /* found it */
 426                                         if (netp != NULL) {
 427                                                 *netp = net;
 428                                         }
 429                                         /* Update the endpoint pointer */
 430                                         *inp_p = inp;
 431                                         SCTP_INP_RUNLOCK(inp);
 432                                         return (stcb);
 433                                 }
 434                         }
 435                 }
 436                 SCTP_TCB_UNLOCK(stcb);
 437
 438                 SCTP_INP_RUNLOCK(inp);
 439         }
 440         return (NULL);
 441 }
 442
 443 struct sctp_tcb *
 444 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
 445     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
 446 {
 447         struct sctp_tcb *stcb;
 448         struct sockaddr_in *sin;
 449         struct sockaddr_in6 *sin6;
 450         struct sockaddr_storage local_store, remote_store;
 451         struct ip *iph;
 452         struct sctp_paramhdr parm_buf, *phdr;
 453         int ptype;
 454
 455         memset(&local_store, 0, sizeof(local_store));
 456         memset(&remote_store, 0, sizeof(remote_store));
 457
 458         /* First get the destination address setup too. */
 459         iph = mtod(m, struct ip *);
 460         if (iph->ip_v == IPVERSION) {
 461                 /* its IPv4 */
 462                 sin = (struct sockaddr_in *)&local_store;
 463                 sin->sin_family = AF_INET;
 464                 sin->sin_len = sizeof(*sin);
 465                 sin->sin_port = sh->dest_port;
 466                 sin->sin_addr.s_addr = iph->ip_dst.s_addr ;
 467         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
 468                 /* its IPv6 */
 469                 struct ip6_hdr *ip6;
 470                 ip6 = mtod(m, struct ip6_hdr *);
 471                 sin6 = (struct sockaddr_in6 *)&local_store;
 472                 sin6->sin6_family = AF_INET6;
 473                 sin6->sin6_len = sizeof(*sin6);
 474                 sin6->sin6_port = sh->dest_port;
 475                 sin6->sin6_addr = ip6->ip6_dst;
 476         } else {
 477                 return NULL;
 478         }
 479
 480         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
 481             &parm_buf, sizeof(struct sctp_paramhdr));
 482         if (phdr == NULL) {
 483 #ifdef SCTP_DEBUG
 484                 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 485                         kprintf("sctp_process_control: failed to get asconf lookup addr\n");
 486                 }
 487 #endif /* SCTP_DEBUG */
 488                 return NULL;
 489         }
 490         ptype = (int)((u_int)ntohs(phdr->param_type));
 491         /* get the correlation address */
 492         if (ptype == SCTP_IPV6_ADDRESS) {
 493                 /* ipv6 address param */
 494                 struct sctp_ipv6addr_param *p6, p6_buf;
 495                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
 496                         return NULL;
 497                 }
 498
 499                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
 500                     offset + sizeof(struct sctp_asconf_chunk),
 501                     &p6_buf.ph, sizeof(*p6));
 502                 if (p6 == NULL) {
 503 #ifdef SCTP_DEBUG
 504                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 505                                 kprintf("sctp_process_control: failed to get asconf v6 lookup addr\n");
 506                         }
 507 #endif /* SCTP_DEBUG */
 508                         return (NULL);
 509                 }
 510                 sin6 = (struct sockaddr_in6 *)&remote_store;
 511                 sin6->sin6_family = AF_INET6;
 512                 sin6->sin6_len = sizeof(*sin6);
 513                 sin6->sin6_port = sh->src_port;
 514                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
 515         } else if (ptype == SCTP_IPV4_ADDRESS) {
 516                 /* ipv4 address param */
 517                 struct sctp_ipv4addr_param *p4, p4_buf;
 518                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
 519                         return NULL;
 520                 }
 521
 522                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
 523                     offset + sizeof(struct sctp_asconf_chunk),
 524                     &p4_buf.ph, sizeof(*p4));
 525                 if (p4 == NULL) {
 526 #ifdef SCTP_DEBUG
 527                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 528                                 kprintf("sctp_process_control: failed to get asconf v4 lookup addr\n");
 529                         }
 530 #endif /* SCTP_DEBUG */
 531                         return (NULL);
 532                 }
 533                 sin = (struct sockaddr_in *)&remote_store;
 534                 sin->sin_family = AF_INET;
 535                 sin->sin_len = sizeof(*sin);
 536                 sin->sin_port = sh->src_port;
 537                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
 538         } else {
 539                 /* invalid address param type */
 540                 return NULL;
 541         }
 542
 543         stcb = sctp_findassociation_ep_addr(inp_p,
 544             (struct sockaddr *)&remote_store, netp,
 545             (struct sockaddr *)&local_store, NULL);
 546         return (stcb);
 547 }
 548
 549 struct sctp_tcb *
 550 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 551     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 552 {
 553         struct sctpasochead *head;
 554         struct sctp_inpcb *inp;
 555         struct sctp_tcb *stcb;
 556         struct sctp_nets *net;
 557         uint16_t rport;
 558
 559         inp = *inp_p;
 560         if (remote->sa_family == AF_INET) {
 561                 rport = (((struct sockaddr_in *)remote)->sin_port);
 562         } else if (remote->sa_family == AF_INET6) {
 563                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 564         } else {
 565                 return (NULL);
 566         }
 567         if (locked_tcb) {
 568                 /* UN-lock so we can do proper locking here
 569                  * this occurs when called from load_addresses_from_init.
 570                  */
 571                 SCTP_TCB_UNLOCK(locked_tcb);
 572         }
 573         SCTP_INP_INFO_RLOCK();
 574         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 575                 /*
 576                  * Now either this guy is our listner or it's the connector.
 577                  * If it is the one that issued the connect, then it's only
 578                  * chance is to be the first TCB in the list. If it is the
 579                  * acceptor, then do the special_lookup to hash and find the
 580                  * real inp.
 581                  */
 582                 if (inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) {
 583                         /* to is peer addr, from is my addr */
 584                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 585                                                        netp);
 586                         if ((stcb != NULL) && (locked_tcb == NULL)){
 587                                 /* we have a locked tcb, lower refcount */
 588                                 SCTP_INP_WLOCK(inp);
 589                                 SCTP_INP_DECR_REF(inp);
 590                                 SCTP_INP_WUNLOCK(inp);
 591                         }
 592                         if (locked_tcb != NULL) {
 593                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 594                                 SCTP_TCB_LOCK(locked_tcb);
 595                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 596                                 if (stcb != NULL)
 597                                         SCTP_TCB_UNLOCK(stcb);
 598                         }
 599                         SCTP_INP_INFO_RUNLOCK();
 600                         return (stcb);
 601                 } else {
 602                         SCTP_INP_WLOCK(inp);
 603                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 604                         if (stcb == NULL) {
 605                                 goto null_return;
 606                         }
 607                         SCTP_TCB_LOCK(stcb);
 608                         if (stcb->rport != rport) {
 609                                 /* remote port does not match. */
 610                                 SCTP_TCB_UNLOCK(stcb);
 611                                 goto null_return;
 612                         }
 613                         /* now look at the list of remote addresses */
 614                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 615                                 if (net->ro._l_addr.sa.sa_family !=
 616                                     remote->sa_family) {
 617                                         /* not the same family */
 618                                         continue;
 619                                 }
 620                                 if (remote->sa_family == AF_INET) {
 621                                         struct sockaddr_in *sin, *rsin;
 622                                         sin = (struct sockaddr_in *)
 623                                                 &net->ro._l_addr;
 624                                         rsin = (struct sockaddr_in *)remote;
 625                                         if (sin->sin_addr.s_addr ==
 626                                             rsin->sin_addr.s_addr) {
 627                                                 /* found it */
 628                                                 if (netp != NULL) {
 629                                                         *netp = net;
 630                                                 }
 631                                                 if (locked_tcb == NULL) {
 632                                                         SCTP_INP_DECR_REF(inp);
 633                                                 }
 634                                                 SCTP_INP_WUNLOCK(inp);
 635                                                 SCTP_INP_INFO_RUNLOCK();
 636                                                 return (stcb);
 637                                         }
 638                                 } else if (remote->sa_family == AF_INET6) {
 639                                         struct sockaddr_in6 *sin6, *rsin6;
 640                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 641                                         rsin6 = (struct sockaddr_in6 *)remote;
 642                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 643                                                                  &rsin6->sin6_addr)) {
 644                                                 /* found it */
 645                                                 if (netp != NULL) {
 646                                                         *netp = net;
 647                                                 }
 648                                                 if (locked_tcb == NULL) {
 649                                                         SCTP_INP_DECR_REF(inp);
 650                                                 }
 651                                                 SCTP_INP_WUNLOCK(inp);
 652                                                 SCTP_INP_INFO_RUNLOCK();
 653                                                 return (stcb);
 654                                         }
 655                                 }
 656                         }
 657                         SCTP_TCB_UNLOCK(stcb);
 658                 }
 659         } else {
 660                 SCTP_INP_WLOCK(inp);
 661                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 662                                                                inp->sctp_hashmark)];
 663                 if (head == NULL) {
 664                         goto null_return;
 665                 }
 666                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 667                         if (stcb->rport != rport) {
 668                                 /* remote port does not match */
 669                                 continue;
 670                         }
 671                         /* now look at the list of remote addresses */
 672                         SCTP_TCB_LOCK(stcb);
 673                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 674                                 if (net->ro._l_addr.sa.sa_family !=
 675                                     remote->sa_family) {
 676                                         /* not the same family */
 677                                         continue;
 678                                 }
 679                                 if (remote->sa_family == AF_INET) {
 680                                         struct sockaddr_in *sin, *rsin;
 681                                         sin = (struct sockaddr_in *)
 682                                                 &net->ro._l_addr;
 683                                         rsin = (struct sockaddr_in *)remote;
 684                                         if (sin->sin_addr.s_addr ==
 685                                             rsin->sin_addr.s_addr) {
 686                                                 /* found it */
 687                                                 if (netp != NULL) {
 688                                                         *netp = net;
 689                                                 }
 690                                                 if (locked_tcb == NULL) {
 691                                                         SCTP_INP_DECR_REF(inp);
 692                                                 }
 693                                                 SCTP_INP_WUNLOCK(inp);
 694                                                 SCTP_INP_INFO_RUNLOCK();
 695                                                 return (stcb);
 696                                         }
 697                                 } else if (remote->sa_family == AF_INET6) {
 698                                         struct sockaddr_in6 *sin6, *rsin6;
 699                                         sin6 = (struct sockaddr_in6 *)
 700                                                 &net->ro._l_addr;
 701                                         rsin6 = (struct sockaddr_in6 *)remote;
 702                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 703                                                                  &rsin6->sin6_addr)) {
 704                                                 /* found it */
 705                                                 if (netp != NULL) {
 706                                                         *netp = net;
 707                                                 }
 708                                                 if (locked_tcb == NULL) {
 709                                                         SCTP_INP_DECR_REF(inp);
 710                                                 }
 711                                                 SCTP_INP_WUNLOCK(inp);
 712                                                 SCTP_INP_INFO_RUNLOCK();
 713                                                 return (stcb);
 714                                         }
 715                                 }
 716                         }
 717                         SCTP_TCB_UNLOCK(stcb);
 718                 }
 719         }
 720  null_return:
 721         /* clean up for returning null */
 722         if (locked_tcb){
 723                 if (locked_tcb->sctp_ep != inp) {
 724                         SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 725                         SCTP_TCB_LOCK(locked_tcb);
 726                         SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 727                 } else
 728                         SCTP_TCB_LOCK(locked_tcb);
 729         }
 730         SCTP_INP_WUNLOCK(inp);
 731         SCTP_INP_INFO_RUNLOCK();
 732         /* not found */
 733         return (NULL);
 734 }
 735
 736 /*
 737  * Find an association for a specific endpoint using the association id
 738  * given out in the COMM_UP notification
 739  */
 740 struct sctp_tcb *
 741 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, caddr_t asoc_id)
 742 {
 743         /*
 744          * Use my the assoc_id to find a endpoint
 745          */
 746         struct sctpasochead *head;
 747         struct sctp_tcb *stcb;
 748         u_int32_t vtag;
 749
 750         if (asoc_id == 0 || inp == NULL) {
 751                 return (NULL);
 752         }
 753         SCTP_INP_INFO_RLOCK();
 754         vtag = (u_int32_t)asoc_id;
 755         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
 756             sctppcbinfo.hashasocmark)];
 757         if (head == NULL) {
 758                 /* invalid vtag */
 759                 SCTP_INP_INFO_RUNLOCK();
 760                 return (NULL);
 761         }
 762         LIST_FOREACH(stcb, head, sctp_asocs) {
 763                 SCTP_INP_RLOCK(stcb->sctp_ep);
 764                 SCTP_TCB_LOCK(stcb);
 765                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 766                 if (stcb->asoc.my_vtag == vtag) {
 767                         /* candidate */
 768                         if (inp != stcb->sctp_ep) {
 769                                 /* some other guy has the
 770                                  * same vtag active (vtag collision).
 771                                  */
 772                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
 773                                 SCTP_TCB_UNLOCK(stcb);
 774                                 continue;
 775                         }
 776                         sctp_pegs[SCTP_VTAG_EXPR]++;
 777                         SCTP_INP_INFO_RUNLOCK();
 778                         return (stcb);
 779                 }
 780                 SCTP_TCB_UNLOCK(stcb);
 781         }
 782         SCTP_INP_INFO_RUNLOCK();
 783         return (NULL);
 784 }
 785
 786 static struct sctp_inpcb *
 787 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 788                     uint16_t lport)
 789 {
 790         struct sctp_inpcb *inp;
 791         struct sockaddr_in *sin;
 792         struct sockaddr_in6 *sin6;
 793         struct sctp_laddr *laddr;
 794
 795         /* Endpoing probe expects
 796          * that the INP_INFO is locked.
 797          */
 798         if (nam->sa_family == AF_INET) {
 799                 sin = (struct sockaddr_in *)nam;
 800                 sin6 = NULL;
 801         } else if (nam->sa_family == AF_INET6) {
 802                 sin6 = (struct sockaddr_in6 *)nam;
 803                 sin = NULL;
 804         } else {
 805                 /* unsupported family */
 806                 return (NULL);
 807         }
 808         if (head == NULL)
 809                 return (NULL);
 810
 811         LIST_FOREACH(inp, head, sctp_hash) {
 812                 SCTP_INP_RLOCK(inp);
 813
 814                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 815                     (inp->sctp_lport == lport)) {
 816                         /* got it */
 817                         if ((nam->sa_family == AF_INET) &&
 818                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 819 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
 820                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
 821 #else
 822 #if defined(__OpenBSD__)
 823                             (0) /* For open bsd we do dual bind only */
 824 #else
 825                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
 826 #endif
 827 #endif
 828                                 ) {
 829                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
 830                                 SCTP_INP_RUNLOCK(inp);
 831                                 continue;
 832                         }
 833                         /* A V6 address and the endpoint is NOT bound V6 */
 834                         if (nam->sa_family == AF_INET6 &&
 835                            (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 836                                 SCTP_INP_RUNLOCK(inp);
 837                                 continue;
 838                         }
 839                         SCTP_INP_RUNLOCK(inp);
 840                         return (inp);
 841                 }
 842                 SCTP_INP_RUNLOCK(inp);
 843         }
 844
 845         if ((nam->sa_family == AF_INET) &&
 846             (sin->sin_addr.s_addr == INADDR_ANY)) {
 847                 /* Can't hunt for one that has no address specified */
 848                 return (NULL);
 849         } else if ((nam->sa_family == AF_INET6) &&
 850                    (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
 851                 /* Can't hunt for one that has no address specified */
 852                 return (NULL);
 853         }
 854         /*
 855          * ok, not bound to all so see if we can find a EP bound to this
 856          * address.
 857          */
 858 #ifdef SCTP_DEBUG
 859         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 860                 kprintf("Ok, there is NO bound-all available for port:%x\n", ntohs(lport));
 861         }
 862 #endif
 863         LIST_FOREACH(inp, head, sctp_hash) {
 864                 SCTP_INP_RLOCK(inp);
 865                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 866                         SCTP_INP_RUNLOCK(inp);
 867                         continue;
 868                 }
 869                 /*
 870                  * Ok this could be a likely candidate, look at all of
 871                  * its addresses
 872                  */
 873                 if (inp->sctp_lport != lport) {
 874                         SCTP_INP_RUNLOCK(inp);
 875                         continue;
 876                 }
 877 #ifdef SCTP_DEBUG
 878                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 879                         kprintf("Ok, found matching local port\n");
 880                 }
 881 #endif
 882                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 883                         if (laddr->ifa == NULL) {
 884 #ifdef SCTP_DEBUG
 885                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 886                                         kprintf("An ounce of prevention is worth a pound of cure\n");
 887                                 }
 888 #endif
 889                                 continue;
 890                         }
 891 #ifdef SCTP_DEBUG
 892                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 893                                 kprintf("Ok laddr->ifa:%p is possible, ",
 894                                     laddr->ifa);
 895                         }
 896 #endif
 897                         if (laddr->ifa->ifa_addr == NULL) {
 898 #ifdef SCTP_DEBUG
 899                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 900                                         kprintf("Huh IFA as an ifa_addr=NULL, ");
 901                                 }
 902 #endif
 903                                 continue;
 904                         }
 905 #ifdef SCTP_DEBUG
 906                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 907                                 kprintf("Ok laddr->ifa:%p is possible, ",
 908                                     laddr->ifa->ifa_addr);
 909                                 sctp_print_address(laddr->ifa->ifa_addr);
 910                                 kprintf("looking for ");
 911                                 sctp_print_address(nam);
 912                         }
 913 #endif
 914                         if (laddr->ifa->ifa_addr->sa_family == nam->sa_family) {
 915                                 /* possible, see if it matches */
 916                                 struct sockaddr_in *intf_addr;
 917                                 intf_addr = (struct sockaddr_in *)
 918                                     laddr->ifa->ifa_addr;
 919                                 if (nam->sa_family == AF_INET) {
 920                                         if (sin->sin_addr.s_addr ==
 921                                             intf_addr->sin_addr.s_addr) {
 922 #ifdef SCTP_DEBUG
 923                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 924                                                         kprintf("YES, return ep:%p\n", inp);
 925                                                 }
 926 #endif
 927                                                 SCTP_INP_RUNLOCK(inp);
 928                                                 return (inp);
 929                                         }
 930                                 } else if (nam->sa_family == AF_INET6) {
 931                                         struct sockaddr_in6 *intf_addr6;
 932                                         intf_addr6 = (struct sockaddr_in6 *)
 933                                             laddr->ifa->ifa_addr;
 934                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 935                                             &intf_addr6->sin6_addr)) {
 936 #ifdef SCTP_DEBUG
 937                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 938                                                         kprintf("YES, return ep:%p\n", inp);
 939                                                 }
 940 #endif
 941                                                 SCTP_INP_RUNLOCK(inp);
 942                                                 return (inp);
 943                                         }
 944                                 }
 945                         }
 946                         SCTP_INP_RUNLOCK(inp);
 947                 }
 948         }
 949 #ifdef SCTP_DEBUG
 950         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 951                 kprintf("NO, Falls out to NULL\n");
 952         }
 953 #endif
 954         return (NULL);
 955 }
 956
 957
 958 struct sctp_inpcb *
 959 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock)
 960 {
 961         /*
 962          * First we check the hash table to see if someone has this port
 963          * bound with just the port.
 964          */
 965         struct sctp_inpcb *inp;
 966         struct sctppcbhead *head;
 967         struct sockaddr_in *sin;
 968         struct sockaddr_in6 *sin6;
 969         int lport;
 970 #ifdef SCTP_DEBUG
 971         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 972                 kprintf("Looking for endpoint %d :",
 973                        ntohs(((struct sockaddr_in *)nam)->sin_port));
 974                 sctp_print_address(nam);
 975         }
 976 #endif
 977         if (nam->sa_family == AF_INET) {
 978                 sin = (struct sockaddr_in *)nam;
 979                 lport = ((struct sockaddr_in *)nam)->sin_port;
 980         } else if (nam->sa_family == AF_INET6) {
 981                 sin6 = (struct sockaddr_in6 *)nam;
 982                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
 983         } else {
 984                 /* unsupported family */
 985                 return (NULL);
 986         }
 987         /*
 988          * I could cheat here and just cast to one of the types but we will
 989          * do it right. It also provides the check against an Unsupported
 990          * type too.
 991          */
 992         /* Find the head of the ALLADDR chain */
 993         if (have_lock == 0)
 994                 SCTP_INP_INFO_RLOCK();
 995         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
 996                                                              sctppcbinfo.hashmark)];
 997 #ifdef SCTP_DEBUG
 998         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 999                 kprintf("Main hash to lookup at head:%p\n", head);
1000         }
1001 #endif
1002         inp = sctp_endpoint_probe(nam, head, lport);
1003
1004         /*
1005          * If the TCP model exists it could be that the main listening
1006          * endpoint is gone but there exists a connected socket for this
1007          * guy yet. If so we can return the first one that we find. This
1008          * may NOT be the correct one but the sctp_findassociation_ep_addr
1009          * has further code to look at all TCP models.
1010          */
1011         if (inp == NULL && find_tcp_pool) {
1012                 unsigned int i;
1013 #ifdef SCTP_DEBUG
1014                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1015                         kprintf("EP was NULL and TCP model is supported\n");
1016                 }
1017 #endif
1018                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1019                         /*
1020                          * This is real gross, but we do NOT have a remote
1021                          * port at this point depending on who is calling. We
1022                          * must therefore look for ANY one that matches our
1023                          * local port :/
1024                          */
1025                         head = &sctppcbinfo.sctp_tcpephash[i];
1026                         if (LIST_FIRST(head)) {
1027                                 inp = sctp_endpoint_probe(nam, head, lport);
1028                                 if (inp) {
1029                                         /* Found one */
1030                                         break;
1031                                 }
1032                         }
1033                 }
1034         }
1035 #ifdef SCTP_DEBUG
1036         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1037                 kprintf("EP to return is %p\n", inp);
1038         }
1039 #endif
1040         if (have_lock == 0) {
1041                 if (inp) {
1042                         SCTP_INP_WLOCK(inp);
1043                         SCTP_INP_INCR_REF(inp);
1044                         SCTP_INP_WUNLOCK(inp);
1045                 }
1046                 SCTP_INP_INFO_RUNLOCK();
1047         } else {
1048                 if (inp) {
1049                         SCTP_INP_WLOCK(inp);
1050                         SCTP_INP_INCR_REF(inp);
1051                         SCTP_INP_WUNLOCK(inp);
1052                 }
1053         }
1054         return (inp);
1055 }
1056
1057 /*
1058  * Find an association for an endpoint with the pointer to whom you want
1059  * to send to and the endpoint pointer. The address can be IPv4 or IPv6.
1060  * We may need to change the *to to some other struct like a mbuf...
1061  */
1062 struct sctp_tcb *
1063 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1064     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
1065 {
1066         struct sctp_inpcb *inp;
1067         struct sctp_tcb *retval;
1068
1069         SCTP_INP_INFO_RLOCK();
1070         if (find_tcp_pool) {
1071                 if (inp_p != NULL) {
1072                         retval = sctp_tcb_special_locate(inp_p, from, to, netp);
1073                 } else {
1074                         retval = sctp_tcb_special_locate(&inp, from, to, netp);
1075                 }
1076                 if (retval != NULL) {
1077                         SCTP_INP_INFO_RUNLOCK();
1078                         return (retval);
1079                 }
1080         }
1081         inp = sctp_pcb_findep(to, 0, 1);
1082         if (inp_p != NULL) {
1083                 *inp_p = inp;
1084         }
1085         SCTP_INP_INFO_RUNLOCK();
1086
1087         if (inp == NULL) {
1088                 return (NULL);
1089         }
1090
1091         /*
1092          * ok, we have an endpoint, now lets find the assoc for it (if any)
1093          * we now place the source address or from in the to of the find
1094          * endpoint call. Since in reality this chain is used from the
1095          * inbound packet side.
1096          */
1097         if (inp_p != NULL) {
1098                 return (sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL));
1099         } else {
1100                 return (sctp_findassociation_ep_addr(&inp, from, netp, to, NULL));
1101         }
1102 }
1103
1104
1105 /*
1106  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1107  * find all addresses that the sender has specified in any address list.
1108  * Each address will be used to lookup the TCB and see if one exits.
1109  */
1110 static struct sctp_tcb *
1111 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1112     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1113     struct sockaddr *dest)
1114 {
1115         struct sockaddr_in sin4;
1116         struct sockaddr_in6 sin6;
1117         struct sctp_paramhdr *phdr, parm_buf;
1118         struct sctp_tcb *retval;
1119         u_int32_t ptype, plen;
1120
1121         memset(&sin4, 0, sizeof(sin4));
1122         memset(&sin6, 0, sizeof(sin6));
1123         sin4.sin_len = sizeof(sin4);
1124         sin4.sin_family = AF_INET;
1125         sin4.sin_port = sh->src_port;
1126         sin6.sin6_len = sizeof(sin6);
1127         sin6.sin6_family = AF_INET6;
1128         sin6.sin6_port = sh->src_port;
1129
1130         retval = NULL;
1131         offset += sizeof(struct sctp_init_chunk);
1132
1133         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1134         while (phdr != NULL) {
1135                 /* now we must see if we want the parameter */
1136                 ptype = ntohs(phdr->param_type);
1137                 plen = ntohs(phdr->param_length);
1138                 if (plen == 0) {
1139 #ifdef SCTP_DEBUG
1140                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1141                                 kprintf("sctp_findassociation_special_addr: Impossible length in parameter\n");
1142                         }
1143 #endif /* SCTP_DEBUG */
1144                         break;
1145                 }
1146                 if (ptype == SCTP_IPV4_ADDRESS &&
1147                     plen == sizeof(struct sctp_ipv4addr_param)) {
1148                         /* Get the rest of the address */
1149                         struct sctp_ipv4addr_param ip4_parm, *p4;
1150
1151                         phdr = sctp_get_next_param(m, offset,
1152                             (struct sctp_paramhdr *)&ip4_parm, plen);
1153                         if (phdr == NULL) {
1154                                 return (NULL);
1155                         }
1156                         p4 = (struct sctp_ipv4addr_param *)phdr;
1157                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1158                         /* look it up */
1159                         retval = sctp_findassociation_ep_addr(inp_p,
1160                             (struct sockaddr *)&sin4, netp, dest, NULL);
1161                         if (retval != NULL) {
1162                                 return (retval);
1163                         }
1164                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1165                     plen == sizeof(struct sctp_ipv6addr_param)) {
1166                         /* Get the rest of the address */
1167                         struct sctp_ipv6addr_param ip6_parm, *p6;
1168
1169                         phdr = sctp_get_next_param(m, offset,
1170                             (struct sctp_paramhdr *)&ip6_parm, plen);
1171                         if (phdr == NULL) {
1172                                 return (NULL);
1173                         }
1174                         p6 = (struct sctp_ipv6addr_param *)phdr;
1175                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1176                         /* look it up */
1177                         retval = sctp_findassociation_ep_addr(inp_p,
1178                             (struct sockaddr *)&sin6, netp, dest, NULL);
1179                         if (retval != NULL) {
1180                                 return (retval);
1181                         }
1182                 }
1183                 offset += SCTP_SIZE32(plen);
1184                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1185                     sizeof(parm_buf));
1186         }
1187         return (NULL);
1188 }
1189
1190 static struct sctp_tcb *
1191 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1192     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1193     uint16_t lport)
1194 {
1195         /*
1196          * Use my vtag to hash. If we find it we then verify the source addr
1197          * is in the assoc. If all goes well we save a bit on rec of a packet.
1198          */
1199         struct sctpasochead *head;
1200         struct sctp_nets *net;
1201         struct sctp_tcb *stcb;
1202
1203         SCTP_INP_INFO_RLOCK();
1204         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1205             sctppcbinfo.hashasocmark)];
1206         if (head == NULL) {
1207                 /* invalid vtag */
1208                 SCTP_INP_INFO_RUNLOCK();
1209                 return (NULL);
1210         }
1211         LIST_FOREACH(stcb, head, sctp_asocs) {
1212                 SCTP_INP_RLOCK(stcb->sctp_ep);
1213                 SCTP_TCB_LOCK(stcb);
1214                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1215                 if (stcb->asoc.my_vtag == vtag) {
1216                         /* candidate */
1217                         if (stcb->rport != rport) {
1218                                 /*
1219                                  * we could remove this if vtags are unique
1220                                  * across the system.
1221                                  */
1222                                 SCTP_TCB_UNLOCK(stcb);
1223                                 continue;
1224                         }
1225                         if (stcb->sctp_ep->sctp_lport != lport) {
1226                                 /*
1227                                  * we could remove this if vtags are unique
1228                                  * across the system.
1229                                  */
1230                                 SCTP_TCB_UNLOCK(stcb);
1231                                 continue;
1232                         }
1233                         net = sctp_findnet(stcb, from);
1234                         if (net) {
1235                                 /* yep its him. */
1236                                 *netp = net;
1237                                 sctp_pegs[SCTP_VTAG_EXPR]++;
1238                                 *inp_p = stcb->sctp_ep;
1239                                 SCTP_INP_INFO_RUNLOCK();
1240                                 return (stcb);
1241                         } else {
1242                                 /* not him, this should only
1243                                  * happen in rare cases so
1244                                  * I peg it.
1245                                  */
1246                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
1247                         }
1248                 }
1249                 SCTP_TCB_UNLOCK(stcb);
1250         }
1251         SCTP_INP_INFO_RUNLOCK();
1252         return (NULL);
1253 }
1254
1255 /*
1256  * Find an association with the pointer to the inbound IP packet. This
1257  * can be a IPv4 or IPv6 packet.
1258  */
1259 struct sctp_tcb *
1260 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1261     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1262     struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1263 {
1264         int find_tcp_pool;
1265         struct ip *iph;
1266         struct sctp_tcb *retval;
1267         struct sockaddr_storage to_store, from_store;
1268         struct sockaddr *to = (struct sockaddr *)&to_store;
1269         struct sockaddr *from = (struct sockaddr *)&from_store;
1270         struct sctp_inpcb *inp;
1271
1272
1273         iph = mtod(m, struct ip *);
1274         if (iph->ip_v == IPVERSION) {
1275                 /* its IPv4 */
1276                 struct sockaddr_in *to4, *from4;
1277
1278                 to4 = (struct sockaddr_in *)&to_store;
1279                 from4 = (struct sockaddr_in *)&from_store;
1280                 bzero(to4, sizeof(*to4));
1281                 bzero(from4, sizeof(*from4));
1282                 from4->sin_family = to4->sin_family = AF_INET;
1283                 from4->sin_len = to4->sin_len = sizeof(struct sockaddr_in);
1284                 from4->sin_addr.s_addr  = iph->ip_src.s_addr;
1285                 to4->sin_addr.s_addr = iph->ip_dst.s_addr ;
1286                 from4->sin_port = sh->src_port;
1287                 to4->sin_port = sh->dest_port;
1288         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1289                 /* its IPv6 */
1290                 struct ip6_hdr *ip6;
1291                 struct sockaddr_in6 *to6, *from6;
1292
1293                 ip6 = mtod(m, struct ip6_hdr *);
1294                 to6 = (struct sockaddr_in6 *)&to_store;
1295                 from6 = (struct sockaddr_in6 *)&from_store;
1296                 bzero(to6, sizeof(*to6));
1297                 bzero(from6, sizeof(*from6));
1298                 from6->sin6_family = to6->sin6_family = AF_INET6;
1299                 from6->sin6_len = to6->sin6_len = sizeof(struct sockaddr_in6);
1300                 to6->sin6_addr = ip6->ip6_dst;
1301                 from6->sin6_addr = ip6->ip6_src;
1302                 from6->sin6_port = sh->src_port;
1303                 to6->sin6_port = sh->dest_port;
1304                 /* Get the scopes in properly to the sin6 addr's */
1305                 in6_recoverscope(to6, &to6->sin6_addr, NULL);
1306 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1307                 in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
1308 #else
1309                 in6_embedscope(&to6->sin6_addr, to6);
1310 #endif
1311
1312                 in6_recoverscope(from6, &from6->sin6_addr, NULL);
1313 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1314                 in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
1315 #else
1316                 in6_embedscope(&from6->sin6_addr, from6);
1317 #endif
1318         } else {
1319                 /* Currently not supported. */
1320                 return (NULL);
1321         }
1322 #ifdef SCTP_DEBUG
1323         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1324                 kprintf("Looking for port %d address :",
1325                        ntohs(((struct sockaddr_in *)to)->sin_port));
1326                 sctp_print_address(to);
1327                 kprintf("From for port %d address :",
1328                        ntohs(((struct sockaddr_in *)from)->sin_port));
1329                 sctp_print_address(from);
1330         }
1331 #endif
1332
1333         if (sh->v_tag) {
1334                 /* we only go down this path if vtag is non-zero */
1335                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1336                     inp_p, netp, sh->src_port, sh->dest_port);
1337                 if (retval) {
1338                         return (retval);
1339                 }
1340         }
1341         find_tcp_pool = 0;
1342         if ((ch->chunk_type != SCTP_INITIATION) &&
1343             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1344             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1345             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1346                 /* Other chunk types go to the tcp pool. */
1347                 find_tcp_pool = 1;
1348         }
1349         if (inp_p) {
1350                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1351                     find_tcp_pool);
1352                 inp = *inp_p;
1353         } else {
1354                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1355                     find_tcp_pool);
1356         }
1357 #ifdef SCTP_DEBUG
1358         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1359                 kprintf("retval:%p inp:%p\n", retval, inp);
1360         }
1361 #endif
1362         if (retval == NULL && inp) {
1363                 /* Found a EP but not this address */
1364 #ifdef SCTP_DEBUG
1365                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1366                         kprintf("Found endpoint %p but no asoc - ep state:%x\n",
1367                             inp, inp->sctp_flags);
1368                 }
1369 #endif
1370                 if ((ch->chunk_type == SCTP_INITIATION) ||
1371                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1372                         /*
1373                          * special hook, we do NOT return linp or an
1374                          * association that is linked to an existing
1375                          * association that is under the TCP pool (i.e. no
1376                          * listener exists). The endpoint finding routine
1377                          * will always find a listner before examining the
1378                          * TCP pool.
1379                          */
1380                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1381 #ifdef SCTP_DEBUG
1382                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1383                                         kprintf("Gak, its in the TCP pool... return NULL");
1384                                 }
1385 #endif
1386                                 if (inp_p) {
1387                                         *inp_p = NULL;
1388                                 }
1389                                 return (NULL);
1390                         }
1391 #ifdef SCTP_DEBUG
1392                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1393                                 kprintf("Now doing SPECIAL find\n");
1394                         }
1395 #endif
1396                         retval = sctp_findassociation_special_addr(m, iphlen,
1397                             offset, sh, inp_p, netp, to);
1398                 }
1399         }
1400 #ifdef SCTP_DEBUG
1401         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1402             kprintf("retval is %p\n", retval);
1403         }
1404 #endif
1405         return (retval);
1406 }
1407
1408 extern int sctp_max_burst_default;
1409
1410 extern unsigned int sctp_delayed_sack_time_default;
1411 extern unsigned int sctp_heartbeat_interval_default;
1412 extern unsigned int sctp_pmtu_raise_time_default;
1413 extern unsigned int sctp_shutdown_guard_time_default;
1414 extern unsigned int sctp_secret_lifetime_default;
1415
1416 extern unsigned int sctp_rto_max_default;
1417 extern unsigned int sctp_rto_min_default;
1418 extern unsigned int sctp_rto_initial_default;
1419 extern unsigned int sctp_init_rto_max_default;
1420 extern unsigned int sctp_valid_cookie_life_default;
1421 extern unsigned int sctp_init_rtx_max_default;
1422 extern unsigned int sctp_assoc_rtx_max_default;
1423 extern unsigned int sctp_path_rtx_max_default;
1424 extern unsigned int sctp_nr_outgoing_streams_default;
1425
1426 /*
1427  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1428  * addresses. This way if we don't get a bind we by default pick a ephemeral
1429  * port with all addresses bound.
1430  */
1431 int
1432 sctp_inpcb_alloc(struct socket *so)
1433 {
1434         /*
1435          * we get called when a new endpoint starts up. We need to allocate
1436          * the sctp_inpcb structure from the zone and init it. Mark it as
1437          * unbound and find a port that we can use as an ephemeral with
1438          * INADDR_ANY. If the user binds later no problem we can then add
1439          * in the specific addresses. And setup the default parameters for
1440          * the EP.
1441          */
1442         int i, error;
1443         struct sctp_inpcb *inp, *n_inp;
1444         struct sctp_pcb *m;
1445         struct timeval time;
1446
1447         error = 0;
1448
1449         /* Hack alert:
1450          *
1451          * This code audits the entire INP list to see if
1452          * any ep's that are in the GONE state are now
1453          * all free. This should not happen really since when
1454          * the last association if freed we should end up deleting
1455          * the inpcb. This code including the locks should
1456          * be taken out ... since the last set of fixes I
1457          * have not seen the "Found a GONE on list" has not
1458          * came out. But i am paranoid and we will leave this
1459          * in at the cost of efficency on allocation of PCB's.
1460          * Probably we should move this to the invariant
1461          * compile options
1462          */
1463 /* #ifdef INVARIANTS*/
1464         SCTP_INP_INFO_RLOCK();
1465         inp = LIST_FIRST(&sctppcbinfo.listhead);
1466         while (inp) {
1467                 n_inp = LIST_NEXT(inp, sctp_list);
1468                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1469                         if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
1470                                 /* finish the job now */
1471                                 kprintf("Found a GONE on list\n");
1472                                 SCTP_INP_INFO_RUNLOCK();
1473                                 sctp_inpcb_free(inp, 1);
1474                                 SCTP_INP_INFO_RLOCK();
1475                         }
1476                 }
1477                 inp = n_inp;
1478         }
1479         SCTP_INP_INFO_RUNLOCK();
1480 /* #endif INVARIANTS*/
1481
1482         SCTP_INP_INFO_WLOCK();
1483         inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
1484         if (inp == NULL) {
1485                 kprintf("Out of SCTP-INPCB structures - no resources\n");
1486                 SCTP_INP_INFO_WUNLOCK();
1487                 return (ENOBUFS);
1488         }
1489
1490         /* zap it */
1491         bzero(inp, sizeof(*inp));
1492
1493         /* bump generations */
1494         inp->ip_inp.inp.inp_socket = so;
1495
1496         /* setup socket pointers */
1497         inp->sctp_socket = so;
1498
1499         /* setup inpcb socket too */
1500         inp->ip_inp.inp.inp_socket = so;
1501         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1502 #ifdef IPSEC
1503 #if !(defined(__OpenBSD__) || defined(__APPLE__))
1504         {
1505                 struct inpcbpolicy *pcb_sp = NULL;
1506                 error = ipsec_init_policy(so, &pcb_sp);
1507                 /* Arrange to share the policy */
1508                 inp->ip_inp.inp.inp_sp = pcb_sp;
1509                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1510         }
1511 #else
1512         /* not sure what to do for openbsd here */
1513         error = 0;
1514 #endif
1515         if (error != 0) {
1516                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1517                 SCTP_INP_INFO_WUNLOCK();
1518                 return error;
1519         }
1520 #endif /* IPSEC */
1521         sctppcbinfo.ipi_count_ep++;
1522 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1523         inp->ip_inp.inp.inp_gencnt = ++sctppcbinfo.ipi_gencnt_ep;
1524         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1525 #else
1526         inp->inp_ip_ttl = ip_defttl;
1527         inp->inp_ip_tos = 0;
1528 #endif
1529
1530         so->so_pcb = (caddr_t)inp;
1531
1532         if ((so->so_type == SOCK_DGRAM) ||
1533             (so->so_type == SOCK_SEQPACKET)) {
1534                 /* UDP style socket */
1535                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1536                     SCTP_PCB_FLAGS_UNBOUND);
1537                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1538         } else if (so->so_type == SOCK_STREAM) {
1539                 /* TCP style socket */
1540                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1541                     SCTP_PCB_FLAGS_UNBOUND);
1542                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1543         } else {
1544                 /*
1545                  * unsupported socket type (RAW, etc)- in case we missed
1546                  * it in protosw
1547                  */
1548                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1549                 SCTP_INP_INFO_WUNLOCK();
1550                 return (EOPNOTSUPP);
1551         }
1552         inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1553 #ifdef __NetBSD__
1554             HASH_LIST,
1555 #endif
1556             M_PCB,
1557 #if defined(__NetBSD__) || defined(__OpenBSD__)
1558             M_WAITOK,
1559 #endif
1560             &inp->sctp_hashmark);
1561         if (inp->sctp_tcbhash == NULL) {
1562                 kprintf("Out of SCTP-INPCB->hashinit - no resources\n");
1563                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1564                 SCTP_INP_INFO_WUNLOCK();
1565                 return (ENOBUFS);
1566         }
1567         /* LOCK init's */
1568         SCTP_INP_LOCK_INIT(inp);
1569         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1570         /* lock the new ep */
1571         SCTP_INP_WLOCK(inp);
1572
1573         /* add it to the info area */
1574         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1575         SCTP_INP_INFO_WUNLOCK();
1576
1577         LIST_INIT(&inp->sctp_addr_list);
1578         LIST_INIT(&inp->sctp_asoc_list);
1579         TAILQ_INIT(&inp->sctp_queue_list);
1580         /* Init the timer structure for signature change */
1581 #if defined (__FreeBSD__) && __FreeBSD_version >= 500000
1582         callout_init(&inp->sctp_ep.signature_change.timer, 0);
1583 #else
1584         callout_init(&inp->sctp_ep.signature_change.timer);
1585 #endif
1586         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1587
1588         /* now init the actual endpoint default data */
1589         m = &inp->sctp_ep;
1590
1591         /* setup the base timeout information */
1592         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1593         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1594         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1595         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
1596         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1597         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1598         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1599         /* all max/min max are in ms */
1600         m->sctp_maxrto = sctp_rto_max_default;
1601         m->sctp_minrto = sctp_rto_min_default;
1602         m->initial_rto = sctp_rto_initial_default;
1603         m->initial_init_rto_max = sctp_init_rto_max_default;
1604
1605         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1606
1607         m->max_init_times = sctp_init_rtx_max_default;
1608         m->max_send_times = sctp_assoc_rtx_max_default;
1609         m->def_net_failure = sctp_path_rtx_max_default;
1610         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1611         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1612         m->max_burst = sctp_max_burst_default;
1613         /* number of streams to pre-open on a association */
1614         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1615
1616         /* Add adaption cookie */
1617         m->adaption_layer_indicator = 0x504C5253;
1618
1619         /* seed random number generator */
1620         m->random_counter = 1;
1621         m->store_at = SCTP_SIGNATURE_SIZE;
1622 #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
1623         read_random_unlimited(m->random_numbers, sizeof(m->random_numbers));
1624 #elif defined(__APPLE__) || (__FreeBSD_version > 500000)
1625         read_random(m->random_numbers, sizeof(m->random_numbers));
1626 #elif defined(__OpenBSD__)
1627         get_random_bytes(m->random_numbers, sizeof(m->random_numbers));
1628 #elif defined(__NetBSD__) && NRND > 0
1629         rnd_extract_data(m->random_numbers, sizeof(m->random_numbers),
1630                          RND_EXTRACT_ANY);
1631 #else
1632         {
1633                 u_int32_t *ranm, *ranp;
1634                 ranp = (u_int32_t *)&m->random_numbers;
1635                 ranm = ranp + (SCTP_SIGNATURE_ALOC_SIZE/sizeof(u_int32_t));
1636                 if ((u_long)ranp % 4) {
1637                         /* not a even boundary? */
1638                         ranp = (u_int32_t *)SCTP_SIZE32((u_long)ranp);
1639                 }
1640                 while (ranp < ranm) {
1641                         *ranp = random();
1642                         ranp++;
1643                 }
1644         }
1645 #endif
1646         sctp_fill_random_store(m);
1647
1648         /* Minimum cookie size */
1649         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1650                 sizeof(struct sctp_state_cookie);
1651         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1652
1653         /* Setup the initial secret */
1654         SCTP_GETTIME_TIMEVAL(&time);
1655         m->time_of_secret_change = time.tv_sec;
1656
1657         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1658                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1659         }
1660         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1661
1662         /* How long is a cookie good for ? */
1663         m->def_cookie_life = sctp_valid_cookie_life_default;
1664         SCTP_INP_WUNLOCK(inp);
1665         return (error);
1666 }
1667
1668
1669 void
1670 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1671     struct sctp_tcb *stcb)
1672 {
1673         uint16_t lport, rport;
1674         struct sctppcbhead *head;
1675         struct sctp_laddr *laddr, *oladdr;
1676
1677         SCTP_TCB_UNLOCK(stcb);
1678         SCTP_INP_INFO_WLOCK();
1679         SCTP_INP_WLOCK(old_inp);
1680         SCTP_INP_WLOCK(new_inp);
1681         SCTP_TCB_LOCK(stcb);
1682
1683         new_inp->sctp_ep.time_of_secret_change =
1684             old_inp->sctp_ep.time_of_secret_change;
1685         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1686             sizeof(old_inp->sctp_ep.secret_key));
1687         new_inp->sctp_ep.current_secret_number =
1688             old_inp->sctp_ep.current_secret_number;
1689         new_inp->sctp_ep.last_secret_number =
1690             old_inp->sctp_ep.last_secret_number;
1691         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1692
1693         /* Copy the port across */
1694         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1695         rport = stcb->rport;
1696         /* Pull the tcb from the old association */
1697         LIST_REMOVE(stcb, sctp_tcbhash);
1698         LIST_REMOVE(stcb, sctp_tcblist);
1699
1700         /* Now insert the new_inp into the TCP connected hash */
1701         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1702             sctppcbinfo.hashtcpmark)];
1703
1704         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1705
1706         /* Now move the tcb into the endpoint list */
1707         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1708         /*
1709          * Question, do we even need to worry about the ep-hash since
1710          * we only have one connection? Probably not :> so lets
1711          * get rid of it and not suck up any kernel memory in that.
1712          */
1713         SCTP_INP_INFO_WUNLOCK();
1714         stcb->sctp_socket = new_inp->sctp_socket;
1715         stcb->sctp_ep = new_inp;
1716         if (new_inp->sctp_tcbhash != NULL) {
1717                 FREE(new_inp->sctp_tcbhash, M_PCB);
1718                 new_inp->sctp_tcbhash = NULL;
1719         }
1720         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1721                 /* Subset bound, so copy in the laddr list from the old_inp */
1722                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1723                         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
1724                             sctppcbinfo.ipi_zone_laddr);
1725                         if (laddr == NULL) {
1726                                 /*
1727                                  * Gak, what can we do? This assoc is really
1728                                  * HOSED. We probably should send an abort
1729                                  * here.
1730                                  */
1731 #ifdef SCTP_DEBUG
1732                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1733                                         kprintf("Association hosed in TCP model, out of laddr memory\n");
1734                                 }
1735 #endif /* SCTP_DEBUG */
1736                                 continue;
1737                         }
1738                         sctppcbinfo.ipi_count_laddr++;
1739                         sctppcbinfo.ipi_gencnt_laddr++;
1740                         bzero(laddr, sizeof(*laddr));
1741                         laddr->ifa = oladdr->ifa;
1742                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1743                             sctp_nxt_addr);
1744                         new_inp->laddr_count++;
1745                 }
1746         }
1747         SCTP_INP_WUNLOCK(new_inp);
1748         SCTP_INP_WUNLOCK(old_inp);
1749 }
1750
1751 static int
1752 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
1753 {
1754         struct sctppcbhead *head;
1755         struct sctp_inpcb *t_inp;
1756
1757         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1758             sctppcbinfo.hashmark)];
1759         LIST_FOREACH(t_inp, head, sctp_hash) {
1760                 if (t_inp->sctp_lport != lport) {
1761                         continue;
1762                 }
1763                 /* This one is in use. */
1764                 /* check the v6/v4 binding issue */
1765                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1766 #if defined(__FreeBSD__)
1767                     (((struct inpcb *)t_inp)->inp_flags & IN6P_IPV6_V6ONLY)
1768 #else
1769 #if defined(__OpenBSD__)
1770                     (0) /* For open bsd we do dual bind only */
1771 #else
1772                     (((struct in6pcb *)t_inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1773 #endif
1774 #endif
1775                         ) {
1776                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1777                                 /* collision in V6 space */
1778                                 return (1);
1779                         } else {
1780                                 /* inp is BOUND_V4 no conflict */
1781                                 continue;
1782                         }
1783                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1784                         /* t_inp is bound v4 and v6, conflict always */
1785                         return (1);
1786                 } else {
1787                         /* t_inp is bound only V4 */
1788                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1789 #if defined(__FreeBSD__)
1790                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
1791 #else
1792 #if defined(__OpenBSD__)
1793                             (0) /* For open bsd we do dual bind only */
1794 #else
1795                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1796 #endif
1797 #endif
1798                                 ) {
1799                                 /* no conflict */
1800                                 continue;
1801                         }
1802                         /* else fall through to conflict */
1803                 }
1804                 return (1);
1805         }
1806         return (0);
1807 }
1808
1809 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
1810 /*
1811  * Don't know why, but without this there is an unknown reference when
1812  * compiling NetBSD... hmm
1813  */
1814 extern void in6_sin6_2_sin (struct sockaddr_in *, struct sockaddr_in6 *sin6);
1815 #endif
1816
1817
1818 int
1819 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
1820 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1821 #else
1822 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct proc *p)
1823 #endif
1824 {
1825         /* bind a ep to a socket address */
1826         struct sctppcbhead *head;
1827         struct sctp_inpcb *inp, *inp_tmp;
1828         struct inpcb *ip_inp;
1829         int bindall;
1830         uint16_t lport;
1831         int error;
1832
1833         lport = 0;
1834         error = 0;
1835         bindall = 1;
1836         inp = (struct sctp_inpcb *)so->so_pcb;
1837         ip_inp = (struct inpcb *)so->so_pcb;
1838 #ifdef SCTP_DEBUG
1839         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1840                 if (addr) {
1841                         kprintf("Bind called port:%d\n",
1842                                ntohs(((struct sockaddr_in *)addr)->sin_port));
1843                         kprintf("Addr :");
1844                         sctp_print_address(addr);
1845                 }
1846         }
1847 #endif /* SCTP_DEBUG */
1848         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1849                 /* already did a bind, subsequent binds NOT allowed ! */
1850                 return (EINVAL);
1851         }
1852
1853         if (addr != NULL) {
1854                 if (addr->sa_family == AF_INET) {
1855                         struct sockaddr_in *sin;
1856
1857                         /* IPV6_V6ONLY socket? */
1858                         if (
1859 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1860                                 (ip_inp->inp_flags & IN6P_IPV6_V6ONLY)
1861 #else
1862 #if defined(__OpenBSD__)
1863                                 (0)     /* For openbsd we do dual bind only */
1864 #else
1865                                 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1866 #endif
1867 #endif
1868                                 ) {
1869                                 return (EINVAL);
1870                         }
1871
1872                         if (addr->sa_len != sizeof(*sin))
1873                                 return (EINVAL);
1874
1875                         sin = (struct sockaddr_in *)addr;
1876                         lport = sin->sin_port;
1877
1878                         if (sin->sin_addr.s_addr != INADDR_ANY) {
1879                                 bindall = 0;
1880                         }
1881                 } else if (addr->sa_family == AF_INET6) {
1882                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
1883                         struct sockaddr_in6 *sin6;
1884
1885                         sin6 = (struct sockaddr_in6 *)addr;
1886
1887                         if (addr->sa_len != sizeof(*sin6))
1888                                 return (EINVAL);
1889
1890                         lport = sin6->sin6_port;
1891                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1892                                 bindall = 0;
1893                                 /* KAME hack: embed scopeid */
1894 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1895                                 if (in6_embedscope(&sin6->sin6_addr, sin6,
1896                                     ip_inp, NULL) != 0)
1897                                         return (EINVAL);
1898 #elif defined(__FreeBSD__)
1899                                 error = scope6_check_id(sin6, ip6_use_defzone);
1900                                 if (error != 0)
1901                                         return (error);
1902 #else
1903                                 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
1904                                         return (EINVAL);
1905                                 }
1906 #endif
1907                         }
1908 #ifndef SCOPEDROUTING
1909                         /* this must be cleared for ifa_ifwithaddr() */
1910                         sin6->sin6_scope_id = 0;
1911 #endif /* SCOPEDROUTING */
1912                 } else {
1913                         return (EAFNOSUPPORT);
1914                 }
1915         }
1916         SCTP_INP_INFO_WLOCK();
1917         SCTP_INP_WLOCK(inp);
1918         /* increase our count due to the unlock we do */
1919         SCTP_INP_INCR_REF(inp);
1920         if (lport) {
1921                 /*
1922                  * Did the caller specify a port? if so we must see if a
1923                  * ep already has this one bound.
1924                  */
1925                 /* got to be root to get at low ports */
1926                 if (ntohs(lport) < IPPORT_RESERVED) {
1927                         if (p && (error =
1928 #ifdef __FreeBSD__
1929 #if __FreeBSD_version >= 500000
1930                             suser_cred(p->td_ucred, 0)
1931 #else
1932                             suser(p)
1933 #endif
1934 #elif defined(__NetBSD__) || defined(__APPLE__)
1935                             suser(p->p_ucred, &p->p_acflag)
1936 #elif defined(__DragonFly__)
1937                             priv_check(p, PRIV_ROOT)
1938 #else
1939                             suser(p, 0)
1940 #endif
1941                             )) {
1942                                 SCTP_INP_DECR_REF(inp);
1943                                 SCTP_INP_WUNLOCK(inp);
1944                                 SCTP_INP_INFO_WUNLOCK();
1945                                 return (error);
1946                         }
1947                 }
1948                 if (p == NULL) {
1949                         SCTP_INP_DECR_REF(inp);
1950                         SCTP_INP_WUNLOCK(inp);
1951                         SCTP_INP_INFO_WUNLOCK();
1952                         return (error);
1953                 }
1954                 SCTP_INP_WUNLOCK(inp);
1955                 inp_tmp = sctp_pcb_findep(addr, 0, 1);
1956                 if (inp_tmp != NULL) {
1957                         /* lock guy returned and lower count
1958                          * note that we are not bound so inp_tmp
1959                          * should NEVER be inp. And it is this
1960                          * inp (inp_tmp) that gets the reference
1961                          * bump, so we must lower it.
1962                          */
1963                         SCTP_INP_WLOCK(inp_tmp);
1964                         SCTP_INP_DECR_REF(inp_tmp);
1965                         SCTP_INP_WUNLOCK(inp_tmp);
1966
1967                         /* unlock info */
1968                         SCTP_INP_INFO_WUNLOCK();
1969                         return (EADDRNOTAVAIL);
1970                 }
1971                 SCTP_INP_WLOCK(inp);
1972                 if (bindall) {
1973                         /* verify that no lport is not used by a singleton */
1974                         if (sctp_isport_inuse(inp, lport)) {
1975                                 /* Sorry someone already has this one bound */
1976                                 SCTP_INP_DECR_REF(inp);
1977                                 SCTP_INP_WUNLOCK(inp);
1978                                 SCTP_INP_INFO_WUNLOCK();
1979                                 return (EADDRNOTAVAIL);
1980                         }
1981                 }
1982         } else {
1983                 /*
1984                  * get any port but lets make sure no one has any address
1985                  * with this port bound
1986                  */
1987
1988                 /*
1989                  * setup the inp to the top (I could use the union but this
1990                  * is just as easy
1991                  */
1992                 uint32_t port_guess;
1993                 uint16_t port_attempt;
1994                 int not_done=1;
1995
1996                 while (not_done) {
1997                         port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
1998                         port_attempt = (port_guess &  0x0000ffff);
1999                         if (port_attempt == 0) {
2000                                 goto next_half;
2001                         }
2002                         if (port_attempt < IPPORT_RESERVED) {
2003                                 port_attempt += IPPORT_RESERVED;
2004                         }
2005
2006                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2007                                 /* got a port we can use */
2008                                 not_done = 0;
2009                                 continue;
2010                         }
2011                         /* try upper half */
2012                 next_half:
2013                         port_attempt = ((port_guess >> 16) &  0x0000ffff);
2014                         if (port_attempt == 0) {
2015                                 goto last_try;
2016                         }
2017                         if (port_attempt < IPPORT_RESERVED) {
2018                                 port_attempt += IPPORT_RESERVED;
2019                         }
2020                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2021                                 /* got a port we can use */
2022                                 not_done = 0;
2023                                 continue;
2024                         }
2025                         /* try two half's added together */
2026                 last_try:
2027                         port_attempt = (((port_guess >> 16) &  0x0000ffff) + (port_guess & 0x0000ffff));
2028                         if (port_attempt == 0) {
2029                                 /* get a new random number */
2030                                 continue;
2031                         }
2032                         if (port_attempt < IPPORT_RESERVED) {
2033                                 port_attempt += IPPORT_RESERVED;
2034                         }
2035                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2036                                 /* got a port we can use */
2037                                 not_done = 0;
2038                                 continue;
2039                         }
2040                 }
2041                 /* we don't get out of the loop until we have a port */
2042                 lport = htons(port_attempt);
2043         }
2044         SCTP_INP_DECR_REF(inp);
2045         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2046                 /* this really should not happen. The guy
2047                  * did a non-blocking bind and then did a close
2048                  * at the same time.
2049                  */
2050                 SCTP_INP_WUNLOCK(inp);
2051                 SCTP_INP_INFO_WUNLOCK();
2052                 return (EINVAL);
2053         }
2054         /* ok we look clear to give out this port, so lets setup the binding */
2055         if (bindall) {
2056                 /* binding to all addresses, so just set in the proper flags */
2057                 inp->sctp_flags |= (SCTP_PCB_FLAGS_BOUNDALL |
2058                     SCTP_PCB_FLAGS_DO_ASCONF);
2059                 /* set the automatic addr changes from kernel flag */
2060                 if (sctp_auto_asconf == 0) {
2061                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2062                 } else {
2063                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2064                 }
2065         } else {
2066                 /*
2067                  * bind specific, make sure flags is off and add a new address
2068                  * structure to the sctp_addr_list inside the ep structure.
2069                  *
2070                  * We will need to allocate one and insert it at the head.
2071                  * The socketopt call can just insert new addresses in there
2072                  * as well. It will also have to do the embed scope kame hack
2073                  * too (before adding).
2074                  */
2075                 struct ifaddr *ifa;
2076                 struct sockaddr_storage store_sa;
2077
2078                 memset(&store_sa, 0, sizeof(store_sa));
2079                 if (addr->sa_family == AF_INET) {
2080                         struct sockaddr_in *sin;
2081
2082                         sin = (struct sockaddr_in *)&store_sa;
2083                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2084                         sin->sin_port = 0;
2085                 } else if (addr->sa_family == AF_INET6) {
2086                         struct sockaddr_in6 *sin6;
2087
2088                         sin6 = (struct sockaddr_in6 *)&store_sa;
2089                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2090                         sin6->sin6_port = 0;
2091                 }
2092                 /*
2093                  * first find the interface with the bound address
2094                  * need to zero out the port to find the address! yuck!
2095                  * can't do this earlier since need port for sctp_pcb_findep()
2096                  */
2097                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
2098                 if (ifa == NULL) {
2099                         /* Can't find an interface with that address */
2100                         SCTP_INP_WUNLOCK(inp);
2101                         SCTP_INP_INFO_WUNLOCK();
2102                         return (EADDRNOTAVAIL);
2103                 }
2104                 if (addr->sa_family == AF_INET6) {
2105                         struct in6_ifaddr *ifa6;
2106                         ifa6 = (struct in6_ifaddr *)ifa;
2107                         /*
2108                          * allow binding of deprecated addresses as per
2109                          * RFC 2462 and ipng discussion
2110                          */
2111                         if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2112                             IN6_IFF_ANYCAST |
2113                             IN6_IFF_NOTREADY)) {
2114                                 /* Can't bind a non-existent addr. */
2115                                 SCTP_INP_WUNLOCK(inp);
2116                                 SCTP_INP_INFO_WUNLOCK();
2117                                 return (EINVAL);
2118                         }
2119                 }
2120                 /* we're not bound all */
2121                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2122 #if 0 /* use sysctl now */
2123                 /* don't allow automatic addr changes from kernel */
2124                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2125 #endif
2126                 /* set the automatic addr changes from kernel flag */
2127                 if (sctp_auto_asconf == 0) {
2128                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2129                 } else {
2130                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2131                 }
2132                 /* allow bindx() to send ASCONF's for binding changes */
2133                 inp->sctp_flags |= SCTP_PCB_FLAGS_DO_ASCONF;
2134                 /* add this address to the endpoint list */
2135                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
2136                 if (error != 0) {
2137                         SCTP_INP_WUNLOCK(inp);
2138                         SCTP_INP_INFO_WUNLOCK();
2139                         return (error);
2140                 }
2141                 inp->laddr_count++;
2142         }
2143         /* find the bucket */
2144         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2145             sctppcbinfo.hashmark)];
2146         /* put it in the bucket */
2147         LIST_INSERT_HEAD(head, inp, sctp_hash);
2148 #ifdef SCTP_DEBUG
2149         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2150                 kprintf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
2151         }
2152 #endif
2153         /* set in the port */
2154         inp->sctp_lport = lport;
2155
2156         /* turn off just the unbound flag */
2157         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2158         SCTP_INP_WUNLOCK(inp);
2159         SCTP_INP_INFO_WUNLOCK();
2160         return (0);
2161 }
2162
2163
2164 static void
2165 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2166 {
2167         struct sctp_iterator *it;
2168         /* We enter with the only the ITERATOR_LOCK in place and
2169          * A write lock on the inp_info stuff.
2170          */
2171
2172         /* Go through all iterators, we must do this since
2173          * it is possible that some iterator does NOT have
2174          * the lock, but is waiting for it. And the one that
2175          * had the lock has either moved in the last iteration
2176          * or we just cleared it above. We need to find all
2177          * of those guys. The list of iterators should never
2178          * be very big though.
2179          */
2180         LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2181                 if (it == inp->inp_starting_point_for_iterator)
2182                         /* skip this guy, he's special */
2183                         continue;
2184                 if (it->inp == inp) {
2185                         /* This is tricky and we DON'T lock the iterator.
2186                          * Reason is he's running but waiting for me since
2187                          * inp->inp_starting_point_for_iterator has the lock
2188                          * on me (the guy above we skipped). This tells us
2189                          * its is not running but waiting for inp->inp_starting_point_for_iterator
2190                          * to be released by the guy that does have our INP in a lock.
2191                          */
2192                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2193                                 it->inp = NULL;
2194                                 it->stcb = NULL;
2195                         } else {
2196                                 /* set him up to do the next guy not me */
2197                                 it->inp = inp_next;
2198                                 it->stcb = NULL;
2199                         }
2200                 }
2201         }
2202         it = inp->inp_starting_point_for_iterator;
2203         if (it) {
2204                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2205                         it->inp = NULL;
2206                 } else {
2207                         it->inp = inp_next;
2208                 }
2209                 it->stcb = NULL;
2210         }
2211 }
2212
2213 /* release sctp_inpcb unbind the port */
2214 void
2215 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate)
2216 {
2217         /*
2218          * Here we free a endpoint. We must find it (if it is in the Hash
2219          * table) and remove it from there. Then we must also find it in
2220          * the overall list and remove it from there. After all removals are
2221          * complete then any timer has to be stopped. Then start the actual
2222          * freeing.
2223          * a) Any local lists.
2224          * b) Any associations.
2225          * c) The hash of all associations.
2226          * d) finally the ep itself.
2227          */
2228         struct sctp_pcb *m;
2229         struct sctp_inpcb *inp_save;
2230         struct sctp_tcb *asoc, *nasoc;
2231         struct sctp_laddr *laddr, *nladdr;
2232         struct inpcb *ip_pcb;
2233         struct socket *so;
2234         struct sctp_socket_q_list *sq;
2235 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2236         struct rtentry *rt;
2237 #endif
2238         int cnt;
2239
2240         crit_enter();
2241         SCTP_ASOC_CREATE_LOCK(inp);
2242         SCTP_INP_WLOCK(inp);
2243
2244         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2245                 /* been here before */
2246                 crit_exit();
2247                 kprintf("Endpoint was all gone (dup free)?\n");
2248                 SCTP_INP_WUNLOCK(inp);
2249                 SCTP_ASOC_CREATE_UNLOCK(inp);
2250                 return;
2251         }
2252         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2253
2254         if (inp->control) {
2255                 sctp_m_freem(inp->control);
2256                 inp->control = NULL;
2257         }
2258         if (inp->pkt) {
2259                 sctp_m_freem(inp->pkt);
2260                 inp->pkt = NULL;
2261         }
2262         so  = inp->sctp_socket;
2263         m = &inp->sctp_ep;
2264         ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2265                                    * pointer here but I will
2266                                    * be nice :> (i.e. ip_pcb = ep;)
2267                                    */
2268
2269         if (immediate == 0) {
2270                 int cnt_in_sd;
2271                 cnt_in_sd = 0;
2272                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2273                      asoc = nasoc) {
2274                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2275                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2276                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2277                                 /* Just abandon things in the front states */
2278                                 SCTP_TCB_LOCK(asoc);
2279                                 SCTP_INP_WUNLOCK(inp);
2280                                 sctp_free_assoc(inp, asoc);
2281                                 SCTP_INP_WLOCK(inp);
2282                                 continue;
2283                         } else {
2284                                 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2285                         }
2286                         if ((asoc->asoc.size_on_delivery_queue  > 0) ||
2287                             (asoc->asoc.size_on_reasm_queue > 0) ||
2288                             (asoc->asoc.size_on_all_streams > 0) ||
2289                             (so && (so->so_rcv.ssb_cc > 0))
2290                                 ) {
2291                                 /* Left with Data unread */
2292                                 struct mbuf *op_err;
2293                                 MGET(op_err, MB_DONTWAIT, MT_DATA);
2294                                 if (op_err) {
2295                                         /* Fill in the user initiated abort */
2296                                         struct sctp_paramhdr *ph;
2297                                         op_err->m_len =
2298                                             sizeof(struct sctp_paramhdr);
2299                                         ph = mtod(op_err,
2300                                             struct sctp_paramhdr *);
2301                                         ph->param_type = htons(
2302                                             SCTP_CAUSE_USER_INITIATED_ABT);
2303                                         ph->param_length = htons(op_err->m_len);
2304                                 }
2305                                 SCTP_TCB_LOCK(asoc);
2306                                 sctp_send_abort_tcb(asoc, op_err);
2307
2308                                 SCTP_INP_WUNLOCK(inp);
2309                                 sctp_free_assoc(inp, asoc);
2310                                 SCTP_INP_WLOCK(inp);
2311                                 continue;
2312                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2313                             TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2314                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2315                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2316                                         /* there is nothing queued to send, so I send shutdown */
2317                                         SCTP_TCB_LOCK(asoc);
2318                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2319                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2320                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2321                                                          asoc->asoc.primary_destination);
2322                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2323                                                          asoc->asoc.primary_destination);
2324                                         sctp_chunk_output(inp, asoc, 1);
2325                                         SCTP_TCB_UNLOCK(asoc);
2326                                 }
2327                         } else {
2328                                 /* mark into shutdown pending */
2329                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2330                         }
2331                         cnt_in_sd++;
2332                 }
2333                 /* now is there some left in our SHUTDOWN state? */
2334                 if (cnt_in_sd) {
2335                         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2336                         crit_exit();
2337                         SCTP_INP_WUNLOCK(inp);
2338                         SCTP_ASOC_CREATE_UNLOCK(inp);
2339                         return;
2340                 }
2341         }
2342 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2343         if (inp->refcount) {
2344                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2345                 SCTP_INP_WUNLOCK(inp);
2346                 SCTP_ASOC_CREATE_UNLOCK(inp);
2347                 return;
2348         }
2349 #endif
2350         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2351 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2352         rt = ip_pcb->inp_route.ro_rt;
2353 #endif
2354
2355         callout_stop(&inp->sctp_ep.signature_change.timer);
2356
2357         if (so) {
2358         /* First take care of socket level things */
2359 #ifdef IPSEC
2360 #ifdef __OpenBSD__
2361         /* XXX IPsec cleanup here */
2362                 crit_enter();
2363                 if (ip_pcb->inp_tdb_in)
2364                     TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2365                                  ip_pcb, inp_tdb_in_next);
2366                 if (ip_pcb->inp_tdb_out)
2367                     TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2368                                  inp_tdb_out_next);
2369                 if (ip_pcb->inp_ipsec_localid)
2370                     ipsp_reffree(ip_pcb->inp_ipsec_localid);
2371                 if (ip_pcb->inp_ipsec_remoteid)
2372                     ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2373                 if (ip_pcb->inp_ipsec_localcred)
2374                     ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2375                 if (ip_pcb->inp_ipsec_remotecred)
2376                     ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2377                 if (ip_pcb->inp_ipsec_localauth)
2378                     ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2379                 if (ip_pcb->inp_ipsec_remoteauth)
2380                     ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2381                 crit_exit();
2382 #else
2383                 ipsec4_delete_pcbpolicy(ip_pcb);
2384 #endif
2385 #endif /*IPSEC*/
2386 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2387                 ACCEPT_LOCK();
2388                 SOCK_LOCK(so);
2389 #endif
2390                 so->so_pcb = 0;
2391 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2392                 sotryfree(so);
2393 #else
2394                 sofree(so);
2395 #endif
2396         }
2397
2398         if (ip_pcb->inp_options) {
2399                 m_free(ip_pcb->inp_options);
2400                 ip_pcb->inp_options = 0;
2401         }
2402 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2403         if (rt) {
2404                 RTFREE(rt);
2405                 ip_pcb->inp_route.ro_rt = 0;
2406         }
2407 #endif
2408         if (ip_pcb->inp_moptions) {
2409                 ip_freemoptions(ip_pcb->inp_moptions);
2410                 ip_pcb->inp_moptions = 0;
2411         }
2412 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2413         inp->inp_vflag = 0;
2414 #else
2415         ip_pcb->inp_vflag = 0;
2416 #endif
2417
2418         /* Now the sctp_pcb things */
2419
2420         /*
2421          * free each asoc if it is not already closed/free. we can't use
2422          * the macro here since le_next will get freed as part of the
2423          * sctp_free_assoc() call.
2424          */
2425         cnt = 0;
2426         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2427              asoc = nasoc) {
2428                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2429                 SCTP_TCB_LOCK(asoc);
2430                 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2431                         struct mbuf *op_err;
2432                         MGET(op_err, MB_DONTWAIT, MT_DATA);
2433                         if (op_err) {
2434                                 /* Fill in the user initiated abort */
2435                                 struct sctp_paramhdr *ph;
2436                                 op_err->m_len = sizeof(struct sctp_paramhdr);
2437                                 ph = mtod(op_err, struct sctp_paramhdr *);
2438                                 ph->param_type = htons(
2439                                     SCTP_CAUSE_USER_INITIATED_ABT);
2440                                 ph->param_length = htons(op_err->m_len);
2441                         }
2442                         sctp_send_abort_tcb(asoc, op_err);
2443                 }
2444                 cnt++;
2445                 /*
2446                  * sctp_free_assoc() will call sctp_inpcb_free(),
2447                  * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2448                  * So, we clear it before sctp_free_assoc() making sure
2449                  * no double sctp_inpcb_free().
2450                  */
2451                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2452                 SCTP_INP_WUNLOCK(inp);
2453                 sctp_free_assoc(inp, asoc);
2454                 SCTP_INP_WLOCK(inp);
2455         }
2456         while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2457                 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2458                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2459                 sctppcbinfo.ipi_count_sockq--;
2460                 sctppcbinfo.ipi_gencnt_sockq++;
2461         }
2462         inp->sctp_socket = 0;
2463         /* Now first we remove ourselves from the overall list of all EP's */
2464
2465         /* Unlock inp first, need correct order */
2466         SCTP_INP_WUNLOCK(inp);
2467         /* now iterator lock */
2468         SCTP_ITERATOR_LOCK();
2469         /* now info lock */
2470         SCTP_INP_INFO_WLOCK();
2471         /* now reget the inp lock */
2472         SCTP_INP_WLOCK(inp);
2473
2474         inp_save = LIST_NEXT(inp, sctp_list);
2475         LIST_REMOVE(inp, sctp_list);
2476         /*
2477          * Now the question comes as to if this EP was ever bound at all.
2478          * If it was, then we must pull it out of the EP hash list.
2479          */
2480         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2481             SCTP_PCB_FLAGS_UNBOUND) {
2482                 /*
2483                  * ok, this guy has been bound. It's port is somewhere
2484                  * in the sctppcbinfo hash table. Remove it!
2485                  */
2486                 LIST_REMOVE(inp, sctp_hash);
2487         }
2488         /* fix any iterators only after out of the list */
2489         sctp_iterator_inp_being_freed(inp, inp_save);
2490         SCTP_ITERATOR_UNLOCK();
2491         /*
2492          * if we have an address list the following will free the list of
2493          * ifaddr's that are set into this ep. Again macro limitations here,
2494          * since the LIST_FOREACH could be a bad idea.
2495          */
2496         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2497              laddr = nladdr) {
2498                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2499                 LIST_REMOVE(laddr, sctp_nxt_addr);
2500                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2501                 sctppcbinfo.ipi_gencnt_laddr++;
2502                 sctppcbinfo.ipi_count_laddr--;
2503         }
2504         /* Now lets see about freeing the EP hash table. */
2505         if (inp->sctp_tcbhash != NULL) {
2506                 FREE(inp->sctp_tcbhash, M_PCB);
2507                 inp->sctp_tcbhash = 0;
2508         }
2509         SCTP_INP_WUNLOCK(inp);
2510         SCTP_ASOC_CREATE_UNLOCK(inp);
2511         SCTP_INP_LOCK_DESTROY(inp);
2512         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2513
2514         /* Now we must put the ep memory back into the zone pool */
2515         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2516         sctppcbinfo.ipi_count_ep--;
2517
2518         SCTP_INP_INFO_WUNLOCK();
2519         crit_exit();
2520 }
2521
2522
2523 struct sctp_nets *
2524 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2525 {
2526         struct sctp_nets *net;
2527         struct sockaddr_in *sin;
2528         struct sockaddr_in6 *sin6;
2529         /* use the peer's/remote port for lookup if unspecified */
2530         sin = (struct sockaddr_in *)addr;
2531         sin6 = (struct sockaddr_in6 *)addr;
2532 #if 0 /* why do we need to check the port for a nets list on an assoc? */
2533         if (stcb->rport != sin->sin_port) {
2534                 /* we cheat and just a sin for this test */
2535                 return (NULL);
2536         }
2537 #endif
2538         /* locate the address */
2539         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2540                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2541                         return (net);
2542         }
2543         return (NULL);
2544 }
2545
2546
2547 /*
2548  * add's a remote endpoint address, done with the INIT/INIT-ACK
2549  * as well as when a ASCONF arrives that adds it. It will also
2550  * initialize all the cwnd stats of stuff.
2551  */
2552 int
2553 sctp_is_address_on_local_host(struct sockaddr *addr)
2554 {
2555         struct ifnet *ifn;
2556
2557         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2558                 struct ifaddr_container *ifac;
2559
2560                 TAILQ_FOREACH(ifac, &ifn->if_addrheads[mycpuid], ifa_link) {
2561                         struct ifaddr *ifa = ifac->ifa;
2562
2563                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2564                                 /* same family */
2565                                 if (addr->sa_family == AF_INET) {
2566                                         struct sockaddr_in *sin, *sin_c;
2567                                         sin = (struct sockaddr_in *)addr;
2568                                         sin_c = (struct sockaddr_in *)
2569                                             ifa->ifa_addr;
2570                                         if (sin->sin_addr.s_addr ==
2571                                             sin_c->sin_addr.s_addr) {
2572                                                 /* we are on the same machine */
2573                                                 return (1);
2574                                         }
2575                                 } else if (addr->sa_family == AF_INET6) {
2576                                         struct sockaddr_in6 *sin6, *sin_c6;
2577                                         sin6 = (struct sockaddr_in6 *)addr;
2578                                         sin_c6 = (struct sockaddr_in6 *)
2579                                             ifa->ifa_addr;
2580                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2581                                             &sin_c6->sin6_addr)) {
2582                                                 /* we are on the same machine */
2583                                                 return (1);
2584                                         }
2585                                 }
2586                         }
2587                 }
2588         }
2589         return (0);
2590 }
2591
2592 int
2593 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2594     int set_scope, int from)
2595 {
2596         /*
2597          * The following is redundant to the same lines in the
2598          * sctp_aloc_assoc() but is needed since other's call the add
2599          * address function
2600          */
2601         struct sctp_nets *net, *netfirst;
2602         int addr_inscope;
2603
2604 #ifdef SCTP_DEBUG
2605         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2606                 kprintf("Adding an address (from:%d) to the peer: ", from);
2607                 sctp_print_address(newaddr);
2608         }
2609 #endif
2610         netfirst = sctp_findnet(stcb, newaddr);
2611         if (netfirst) {
2612                 /*
2613                  * Lie and return ok, we don't want to make the association
2614                  * go away for this behavior. It will happen in the TCP model
2615                  * in a connected socket. It does not reach the hash table
2616                  * until after the association is built so it can't be found.
2617                  * Mark as reachable, since the initial creation will have
2618                  * been cleared and the NOT_IN_ASSOC flag will have been
2619                  * added... and we don't want to end up removing it back out.
2620                  */
2621                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2622                         netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2623                             SCTP_ADDR_UNCONFIRMED);
2624                 } else {
2625                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2626                 }
2627
2628                 return (0);
2629         }
2630         addr_inscope = 1;
2631         if (newaddr->sa_family == AF_INET) {
2632                 struct sockaddr_in *sin;
2633                 sin = (struct sockaddr_in *)newaddr;
2634                 if (sin->sin_addr.s_addr == 0) {
2635                         /* Invalid address */
2636                         return (-1);
2637                 }
2638                 /* zero out the bzero area */
2639                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2640
2641                 /* assure len is set */
2642                 sin->sin_len = sizeof(struct sockaddr_in);
2643                 if (set_scope) {
2644 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2645                         stcb->ipv4_local_scope = 1;
2646 #else
2647                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2648                                 stcb->asoc.ipv4_local_scope = 1;
2649                         }
2650 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2651
2652                         if (sctp_is_address_on_local_host(newaddr)) {
2653                                 stcb->asoc.loopback_scope = 1;
2654                                 stcb->asoc.ipv4_local_scope = 1;
2655                                 stcb->asoc.local_scope = 1;
2656                                 stcb->asoc.site_scope = 1;
2657                         }
2658                 } else {
2659                         if (from == 8) {
2660                                 /* From connectx */
2661                                 if (sctp_is_address_on_local_host(newaddr)) {
2662                                         stcb->asoc.loopback_scope = 1;
2663                                         stcb->asoc.ipv4_local_scope = 1;
2664                                         stcb->asoc.local_scope = 1;
2665                                         stcb->asoc.site_scope = 1;
2666                                 }
2667                         }
2668                         /* Validate the address is in scope */
2669                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2670                             (stcb->asoc.ipv4_local_scope == 0)) {
2671                                 addr_inscope = 0;
2672                         }
2673                 }
2674         } else if (newaddr->sa_family == AF_INET6) {
2675                 struct sockaddr_in6 *sin6;
2676                 sin6 = (struct sockaddr_in6 *)newaddr;
2677                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2678                         /* Invalid address */
2679                         return (-1);
2680                 }
2681                 /* assure len is set */
2682                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2683                 if (set_scope) {
2684                         if (sctp_is_address_on_local_host(newaddr)) {
2685                                 stcb->asoc.loopback_scope = 1;
2686                                 stcb->asoc.local_scope = 1;
2687                                 stcb->asoc.ipv4_local_scope = 1;
2688                                 stcb->asoc.site_scope = 1;
2689                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2690                                 /*
2691                                  * If the new destination is a LINK_LOCAL
2692                                  * we must have common site scope. Don't set
2693                                  * the local scope since we may not share all
2694                                  * links, only loopback can do this.
2695                                  * Links on the local network would also
2696                                  * be on our private network for v4 too.
2697                                  */
2698                                 stcb->asoc.ipv4_local_scope = 1;
2699                                 stcb->asoc.site_scope = 1;
2700                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2701                                 /*
2702                                  * If the new destination is SITE_LOCAL
2703                                  * then we must have site scope in common.
2704                                  */
2705                                 stcb->asoc.site_scope = 1;
2706                         }
2707                 } else {
2708                         if (from == 8) {
2709                                 /* From connectx */
2710                                 if (sctp_is_address_on_local_host(newaddr)) {
2711                                         stcb->asoc.loopback_scope = 1;
2712                                         stcb->asoc.ipv4_local_scope = 1;
2713                                         stcb->asoc.local_scope = 1;
2714                                         stcb->asoc.site_scope = 1;
2715                                 }
2716                         }
2717                         /* Validate the address is in scope */
2718                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2719                             (stcb->asoc.loopback_scope == 0)) {
2720                                 addr_inscope = 0;
2721                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2722                                    (stcb->asoc.local_scope == 0)) {
2723                                 addr_inscope = 0;
2724                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2725                                    (stcb->asoc.site_scope == 0)) {
2726                                 addr_inscope = 0;
2727                         }
2728                 }
2729         } else {
2730                 /* not supported family type */
2731                 return (-1);
2732         }
2733         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2734         if (net == NULL) {
2735                 return (-1);
2736         }
2737         sctppcbinfo.ipi_count_raddr++;
2738         sctppcbinfo.ipi_gencnt_raddr++;
2739         bzero(net, sizeof(*net));
2740         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2741         if (newaddr->sa_family == AF_INET) {
2742                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2743         } else if (newaddr->sa_family == AF_INET6) {
2744                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2745         }
2746         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2747         net->failure_threshold = stcb->asoc.def_net_failure;
2748         if (addr_inscope == 0) {
2749 #ifdef SCTP_DEBUG
2750                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2751                         kprintf("Adding an address which is OUT OF SCOPE\n");
2752                 }
2753 #endif /* SCTP_DEBUG */
2754                 net->dest_state = (SCTP_ADDR_REACHABLE |
2755                     SCTP_ADDR_OUT_OF_SCOPE);
2756         } else {
2757                 if (from == 8)
2758                         /* 8 is passed by connect_x */
2759                         net->dest_state = SCTP_ADDR_REACHABLE;
2760                 else
2761                         net->dest_state = SCTP_ADDR_REACHABLE |
2762                             SCTP_ADDR_UNCONFIRMED;
2763         }
2764         net->RTO = stcb->asoc.initial_rto;
2765         stcb->asoc.numnets++;
2766         net->ref_count = 1;
2767
2768         /* Init the timer structure */
2769 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2770         callout_init(&net->rxt_timer.timer, 0);
2771         callout_init(&net->pmtu_timer.timer, 0);
2772 #else
2773         callout_init(&net->rxt_timer.timer);
2774         callout_init(&net->pmtu_timer.timer);
2775 #endif
2776
2777         /* Now generate a route for this guy */
2778         /* KAME hack: embed scopeid */
2779         if (newaddr->sa_family == AF_INET6) {
2780                 struct sockaddr_in6 *sin6;
2781                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2782 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2783                 in6_embedscope(&sin6->sin6_addr, sin6,
2784                     &stcb->sctp_ep->ip_inp.inp, NULL);
2785 #else
2786                 in6_embedscope(&sin6->sin6_addr, sin6);
2787 #endif
2788 #ifndef SCOPEDROUTING
2789                 sin6->sin6_scope_id = 0;
2790 #endif
2791         }
2792 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2793         rtalloc_ign((struct route *)&net->ro, 0UL);
2794 #else
2795         rtalloc((struct route *)&net->ro);
2796 #endif
2797         if (newaddr->sa_family == AF_INET6) {
2798                 struct sockaddr_in6 *sin6;
2799                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2800                 in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2801         }
2802         if ((net->ro.ro_rt) &&
2803             (net->ro.ro_rt->rt_ifp)) {
2804                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2805                 if (from == 1) {
2806                         stcb->asoc.smallest_mtu = net->mtu;
2807                 }
2808                 /* start things off to match mtu of interface please. */
2809                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2810         } else {
2811                 net->mtu = stcb->asoc.smallest_mtu;
2812         }
2813         if (stcb->asoc.smallest_mtu > net->mtu) {
2814                 stcb->asoc.smallest_mtu = net->mtu;
2815         }
2816         /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2817          * We then limit this to 4 MTU's of sending.
2818          */
2819         net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2820
2821         /* we always get at LEAST 2 MTU's */
2822         if (net->cwnd < (2 * net->mtu)) {
2823                 net->cwnd = 2 * net->mtu;
2824         }
2825
2826         net->ssthresh = stcb->asoc.peers_rwnd;
2827
2828         net->src_addr_selected = 0;
2829         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2830         if (net->ro.ro_rt == NULL) {
2831                 /* Since we have no route put it at the back */
2832                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2833         } else if (netfirst == NULL) {
2834                 /* We are the first one in the pool. */
2835                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2836         } else if (netfirst->ro.ro_rt == NULL) {
2837                 /*
2838                  * First one has NO route. Place this one ahead of the
2839                  * first one.
2840                  */
2841                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2842         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2843                 /*
2844                  * This one has a different interface than the one at the
2845                  * top of the list. Place it ahead.
2846                  */
2847                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2848         } else {
2849                 /*
2850                  * Ok we have the same interface as the first one. Move
2851                  * forward until we find either
2852                  *   a) one with a NULL route... insert ahead of that
2853                  *   b) one with a different ifp.. insert after that.
2854                  *   c) end of the list.. insert at the tail.
2855                  */
2856                 struct sctp_nets *netlook;
2857                 do {
2858                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2859                         if (netlook == NULL) {
2860                                 /* End of the list */
2861                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2862                                     sctp_next);
2863                                 break;
2864                         } else if (netlook->ro.ro_rt == NULL) {
2865                                 /* next one has NO route */
2866                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2867                                 break;
2868                         } else if (netlook->ro.ro_rt->rt_ifp !=
2869                                    net->ro.ro_rt->rt_ifp) {
2870                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2871                                     net, sctp_next);
2872                                 break;
2873                         }
2874                         /* Shift forward */
2875                         netfirst = netlook;
2876                 } while (netlook != NULL);
2877         }
2878         /* got to have a primary set */
2879         if (stcb->asoc.primary_destination == 0) {
2880                 stcb->asoc.primary_destination = net;
2881         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2882                    (net->ro.ro_rt)) {
2883                 /* No route to current primary adopt new primary */
2884                 stcb->asoc.primary_destination = net;
2885         }
2886         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2887             net);
2888
2889         return (0);
2890 }
2891
2892
2893 /*
2894  * allocate an association and add it to the endpoint. The caller must
2895  * be careful to add all additional addresses once they are know right
2896  * away or else the assoc will be may experience a blackout scenario.
2897  */
2898 struct sctp_tcb *
2899 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2900     int for_a_init, int *error,  uint32_t override_tag)
2901 {
2902         struct sctp_tcb *stcb;
2903         struct sctp_association *asoc;
2904         struct sctpasochead *head;
2905         uint16_t rport;
2906         int err;
2907
2908         /*
2909          * Assumption made here:
2910          *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2911          *  to make sure the address does not exist already.
2912          */
2913         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2914                 /* Hit max assoc, sorry no more */
2915                 *error = ENOBUFS;
2916                 return (NULL);
2917         }
2918         SCTP_INP_RLOCK(inp);
2919         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2920                 /*
2921                  * If its in the TCP pool, its NOT allowed to create an
2922                  * association. The parent listener needs to call
2923                  * sctp_aloc_assoc.. or the one-2-many socket. If a
2924                  * peeled off, or connected one does this.. its an error.
2925                  */
2926                 SCTP_INP_RUNLOCK(inp);
2927                 *error = EINVAL;
2928                 return (NULL);
2929         }
2930
2931 #ifdef SCTP_DEBUG
2932         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2933                 kprintf("Allocate an association for peer:");
2934                 if (firstaddr)
2935                         sctp_print_address(firstaddr);
2936                 else
2937                         kprintf("None\n");
2938                 kprintf("Port:%d\n",
2939                        ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2940         }
2941 #endif /* SCTP_DEBUG */
2942         if (firstaddr->sa_family == AF_INET) {
2943                 struct sockaddr_in *sin;
2944                 sin = (struct sockaddr_in *)firstaddr;
2945                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2946                         /* Invalid address */
2947 #ifdef SCTP_DEBUG
2948                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2949                                 kprintf("peer address invalid\n");
2950                         }
2951 #endif
2952                         SCTP_INP_RUNLOCK(inp);
2953                         *error = EINVAL;
2954                         return (NULL);
2955                 }
2956                 rport = sin->sin_port;
2957         } else if (firstaddr->sa_family == AF_INET6) {
2958                 struct sockaddr_in6 *sin6;
2959                 sin6 = (struct sockaddr_in6 *)firstaddr;
2960                 if ((sin6->sin6_port == 0) ||
2961                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2962                         /* Invalid address */
2963 #ifdef SCTP_DEBUG
2964                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2965                                 kprintf("peer address invalid\n");
2966                         }
2967 #endif
2968                         SCTP_INP_RUNLOCK(inp);
2969                         *error = EINVAL;
2970                         return (NULL);
2971                 }
2972                 rport = sin6->sin6_port;
2973         } else {
2974                 /* not supported family type */
2975 #ifdef SCTP_DEBUG
2976                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2977                         kprintf("BAD family %d\n", firstaddr->sa_family);
2978                 }
2979 #endif
2980                 SCTP_INP_RUNLOCK(inp);
2981                 *error = EINVAL;
2982                 return (NULL);
2983         }
2984         SCTP_INP_RUNLOCK(inp);
2985         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2986                 /*
2987                  * If you have not performed a bind, then we need to do
2988                  * the ephemerial bind for you.
2989                  */
2990 #ifdef SCTP_DEBUG
2991                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2992                         kprintf("Doing implicit BIND\n");
2993                 }
2994 #endif
2995
2996                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2997                     (struct sockaddr *)NULL,
2998 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2999                                            (struct thread *)NULL
3000 #else
3001                                            (struct proc *)NULL
3002 #endif
3003                              ))){
3004                         /* bind error, probably perm */
3005 #ifdef SCTP_DEBUG
3006                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3007                                 kprintf("BIND FAILS ret:%d\n", err);
3008                         }
3009 #endif
3010
3011                         *error = err;
3012                         return (NULL);
3013                 }
3014         }
3015         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3016         if (stcb == NULL) {
3017                 /* out of memory? */
3018 #ifdef SCTP_DEBUG
3019                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3020                         kprintf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3021                 }
3022 #endif
3023                 *error = ENOMEM;
3024                 return (NULL);
3025         }
3026         sctppcbinfo.ipi_count_asoc++;
3027         sctppcbinfo.ipi_gencnt_asoc++;
3028
3029         bzero(stcb, sizeof(*stcb));
3030         asoc = &stcb->asoc;
3031         SCTP_TCB_LOCK_INIT(stcb);
3032         /* setup back pointer's */
3033         stcb->sctp_ep = inp;
3034         stcb->sctp_socket = inp->sctp_socket;
3035         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3036                 /* failed */
3037                 SCTP_TCB_LOCK_DESTROY (stcb);
3038                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3039                 sctppcbinfo.ipi_count_asoc--;
3040 #ifdef SCTP_DEBUG
3041                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3042                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3043                 }
3044 #endif
3045                 *error = err;
3046                 return (NULL);
3047         }
3048         /* and the port */
3049         stcb->rport = rport;
3050         SCTP_INP_INFO_WLOCK();
3051         SCTP_INP_WLOCK(inp);
3052         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3053                 /* inpcb freed while alloc going on */
3054                 SCTP_TCB_LOCK_DESTROY (stcb);
3055                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3056                 SCTP_INP_WUNLOCK(inp);
3057                 SCTP_INP_INFO_WUNLOCK();
3058                 sctppcbinfo.ipi_count_asoc--;
3059 #ifdef SCTP_DEBUG
3060                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3061                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3062                 }
3063 #endif
3064                 *error = EINVAL;
3065                 return (NULL);
3066         }
3067         SCTP_TCB_LOCK(stcb);
3068
3069         /* now that my_vtag is set, add it to the  hash */
3070         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3071              sctppcbinfo.hashasocmark)];
3072         /* put it in the bucket in the vtag hash of assoc's for the system */
3073         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3074         SCTP_INP_INFO_WUNLOCK();
3075
3076
3077         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3078                 /* failure.. memory error? */
3079                 if (asoc->strmout)
3080                         FREE(asoc->strmout, M_PCB);
3081                 if (asoc->mapping_array)
3082                         FREE(asoc->mapping_array, M_PCB);
3083
3084                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3085                 sctppcbinfo.ipi_count_asoc--;
3086 #ifdef SCTP_DEBUG
3087                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3088                         kprintf("aloc_assoc: couldn't add remote addr!\n");
3089                 }
3090 #endif
3091                 SCTP_TCB_LOCK_DESTROY (stcb);
3092                 *error = ENOBUFS;
3093                 return (NULL);
3094         }
3095         /* Init all the timers */
3096 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3097         callout_init(&asoc->hb_timer.timer, 0);
3098         callout_init(&asoc->dack_timer.timer, 0);
3099         callout_init(&asoc->asconf_timer.timer, 0);
3100         callout_init(&asoc->shut_guard_timer.timer, 0);
3101         callout_init(&asoc->autoclose_timer.timer, 0);
3102         callout_init(&asoc->delayed_event_timer.timer, 0);
3103 #else
3104         callout_init(&asoc->hb_timer.timer);
3105         callout_init(&asoc->dack_timer.timer);
3106         callout_init(&asoc->asconf_timer.timer);
3107         callout_init(&asoc->shut_guard_timer.timer);
3108         callout_init(&asoc->autoclose_timer.timer);
3109         callout_init(&asoc->delayed_event_timer.timer);
3110 #endif
3111         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3112         /* now file the port under the hash as well */
3113         if (inp->sctp_tcbhash != NULL) {
3114                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3115                    inp->sctp_hashmark)];
3116                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3117         }
3118         SCTP_INP_WUNLOCK(inp);
3119 #ifdef SCTP_DEBUG
3120         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3121                 kprintf("Association %p now allocated\n", stcb);
3122         }
3123 #endif
3124         return (stcb);
3125 }
3126
3127 void
3128 sctp_free_remote_addr(struct sctp_nets *net)
3129 {
3130         if (net == NULL)
3131                 return;
3132         net->ref_count--;
3133         if (net->ref_count <= 0) {
3134                 /* stop timer if running */
3135                 callout_stop(&net->rxt_timer.timer);
3136                 callout_stop(&net->pmtu_timer.timer);
3137                 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3138                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3139                 sctppcbinfo.ipi_count_raddr--;
3140         }
3141 }
3142
3143 /*
3144  * remove a remote endpoint address from an association, it
3145  * will fail if the address does not exist.
3146  */
3147 int
3148 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3149 {
3150         /*
3151          * Here we need to remove a remote address. This is quite simple, we
3152          * first find it in the list of address for the association
3153          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3154          * that item.
3155          * Note we do not allow it to be removed if there are no other
3156          * addresses.
3157          */
3158         struct sctp_association *asoc;
3159         struct sctp_nets *net, *net_tmp;
3160         asoc = &stcb->asoc;
3161         if (asoc->numnets < 2) {
3162                 /* Must have at LEAST two remote addresses */
3163                 return (-1);
3164         }
3165         /* locate the address */
3166         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3167                 net_tmp = TAILQ_NEXT(net, sctp_next);
3168                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3169                         continue;
3170                 }
3171                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3172                     remaddr)) {
3173                         /* we found the guy */
3174                         asoc->numnets--;
3175                         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3176                         sctp_free_remote_addr(net);
3177                         if (net == asoc->primary_destination) {
3178                                 /* Reset primary */
3179                                 struct sctp_nets *lnet;
3180                                 lnet = TAILQ_FIRST(&asoc->nets);
3181                                 /* Try to find a confirmed primary */
3182                                 asoc->primary_destination =
3183                                     sctp_find_alternate_net(stcb, lnet);
3184                         }
3185                         if (net == asoc->last_data_chunk_from) {
3186                                 /* Reset primary */
3187                                 asoc->last_data_chunk_from =
3188                                     TAILQ_FIRST(&asoc->nets);
3189                         }
3190                         if (net == asoc->last_control_chunk_from) {
3191                                 /* Reset primary */
3192                                 asoc->last_control_chunk_from =
3193                                     TAILQ_FIRST(&asoc->nets);
3194                         }
3195                         if (net == asoc->asconf_last_sent_to) {
3196                                 /* Reset primary */
3197                                 asoc->asconf_last_sent_to =
3198                                     TAILQ_FIRST(&asoc->nets);
3199                         }
3200                         return (0);
3201                 }
3202         }
3203         /* not found. */
3204         return (-2);
3205 }
3206
3207
3208 static void
3209 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3210 {
3211         struct sctpvtaghead *chain;
3212         struct sctp_tagblock *twait_block;
3213         struct timeval now;
3214         int set, i;
3215         SCTP_GETTIME_TIMEVAL(&now);
3216         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3217         set = 0;
3218         if (!LIST_EMPTY(chain)) {
3219                 /* Block(s) present, lets find space, and expire on the fly */
3220                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3221                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3222                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3223                                     !set) {
3224                                         twait_block->vtag_block[0].tv_sec_at_expire =
3225                                             now.tv_sec + SCTP_TIME_WAIT;
3226                                         twait_block->vtag_block[0].v_tag = tag;
3227                                         set = 1;
3228                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3229                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3230                                     now.tv_sec)) {
3231                                         /* Audit expires this guy */
3232                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3233                                         twait_block->vtag_block[i].v_tag = 0;
3234                                         if (set == 0) {
3235                                                 /* Reuse it for my new tag */
3236                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3237                                                 twait_block->vtag_block[0].v_tag = tag;
3238                                                 set = 1;
3239                                         }
3240                                 }
3241                         }
3242                         if (set) {
3243                                 /*
3244                                  * We only do up to the block where we can
3245                                  * place our tag for audits
3246                                  */
3247                                 break;
3248                         }
3249                 }
3250         }
3251         /* Need to add a new block to chain */
3252         if (!set) {
3253                 MALLOC(twait_block, struct sctp_tagblock *,
3254                        sizeof(struct sctp_tagblock), M_PCB, M_NOWAIT);
3255                 if (twait_block == NULL) {
3256                         return;
3257                 }
3258                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3259                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3260                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3261                     SCTP_TIME_WAIT;
3262                 twait_block->vtag_block[0].v_tag = tag;
3263         }
3264 }
3265
3266
3267 static void
3268 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3269 {
3270         struct sctp_iterator *it;
3271
3272
3273
3274         /* Unlock the tcb lock we do this so
3275          * we avoid a dead lock scenario where
3276          * the iterator is waiting on the TCB lock
3277          * and the TCB lock is waiting on the iterator
3278          * lock.
3279          */
3280         SCTP_ITERATOR_LOCK();
3281         SCTP_INP_INFO_WLOCK();
3282         SCTP_INP_WLOCK(inp);
3283         SCTP_TCB_LOCK(stcb);
3284
3285         it = stcb->asoc.stcb_starting_point_for_iterator;
3286         if (it == NULL) {
3287                 return;
3288         }
3289         if (it->inp != stcb->sctp_ep) {
3290                 /* hm, focused on the wrong one? */
3291                 return;
3292         }
3293         if (it->stcb != stcb) {
3294                 return;
3295         }
3296         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3297         if (it->stcb == NULL) {
3298                 /* done with all asoc's in this assoc */
3299                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3300                         it->inp = NULL;
3301                 } else {
3302
3303                         it->inp = LIST_NEXT(inp, sctp_list);
3304                 }
3305         }
3306 }
3307
3308 /*
3309  * Free the association after un-hashing the remote port.
3310  */
3311 void
3312 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3313 {
3314         struct sctp_association *asoc;
3315         struct sctp_nets *net, *prev;
3316         struct sctp_laddr *laddr;
3317         struct sctp_tmit_chunk *chk;
3318         struct sctp_asconf_addr *aparam;
3319         struct sctp_socket_q_list *sq;
3320
3321         /* first, lets purge the entry from the hash table. */
3322         crit_enter();
3323         if (stcb->asoc.state == 0) {
3324                 kprintf("Freeing already free association:%p - huh??\n",
3325                     stcb);
3326                 crit_exit();
3327                 return;
3328         }
3329         asoc = &stcb->asoc;
3330         asoc->state = 0;
3331         /* now clean up any other timers */
3332         callout_stop(&asoc->hb_timer.timer);
3333         callout_stop(&asoc->dack_timer.timer);
3334         callout_stop(&asoc->asconf_timer.timer);
3335         callout_stop(&asoc->shut_guard_timer.timer);
3336         callout_stop(&asoc->autoclose_timer.timer);
3337         callout_stop(&asoc->delayed_event_timer.timer);
3338         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3339                 callout_stop(&net->rxt_timer.timer);
3340                 callout_stop(&net->pmtu_timer.timer);
3341         }
3342
3343         /* Iterator asoc being freed we send an
3344          * unlocked TCB. It returns with INP_INFO
3345          * and INP write locked and the TCB locked
3346          * too and of course the iterator lock
3347          * in place as well..
3348          */
3349         SCTP_TCB_UNLOCK(stcb);
3350         sctp_iterator_asoc_being_freed(inp, stcb);
3351
3352         /* Null all of my entry's on the socket q */
3353         TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3354                 if (sq->tcb == stcb) {
3355                         sq->tcb = NULL;
3356                 }
3357         }
3358
3359         if (inp->sctp_tcb_at_block == (void *)stcb) {
3360                 inp->error_on_block = ECONNRESET;
3361         }
3362
3363         if (inp->sctp_tcbhash) {
3364                 LIST_REMOVE(stcb, sctp_tcbhash);
3365         }
3366         /* Now lets remove it from the list of ALL associations in the EP */
3367         LIST_REMOVE(stcb, sctp_tcblist);
3368         SCTP_INP_WUNLOCK(inp);
3369         SCTP_ITERATOR_UNLOCK();
3370
3371
3372         /* pull from vtag hash */
3373         LIST_REMOVE(stcb, sctp_asocs);
3374
3375         /*
3376          * Now before we can free the assoc, we must  remove all of the
3377          * networks and any other allocated space.. i.e. add removes here
3378          * before the SCTP_ZONE_FREE() of the tasoc entry.
3379          */
3380
3381         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3382         SCTP_INP_INFO_WUNLOCK();
3383         prev = NULL;
3384         while (!TAILQ_EMPTY(&asoc->nets)) {
3385                 net = TAILQ_FIRST(&asoc->nets);
3386                 /* pull from list */
3387                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3388                         break;
3389                 }
3390                 prev = net;
3391                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3392                 /* free it */
3393                 net->ref_count = 0;
3394                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3395                 sctppcbinfo.ipi_count_raddr--;
3396         }
3397         /*
3398          * The chunk lists and such SHOULD be empty but we check them
3399          * just in case.
3400          */
3401         /* anything on the wheel needs to be removed */
3402         while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3403                 struct sctp_stream_out *outs;
3404                 outs = TAILQ_FIRST(&asoc->out_wheel);
3405                 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3406                 /* now clean up any chunks here */
3407                 chk = TAILQ_FIRST(&outs->outqueue);
3408                 while (chk) {
3409                         TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3410                         if (chk->data) {
3411                                 sctp_m_freem(chk->data);
3412                                 chk->data = NULL;
3413                         }
3414                         chk->whoTo = NULL;
3415                         chk->asoc = NULL;
3416                         /* Free the chunk */
3417                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3418                         sctppcbinfo.ipi_count_chunk--;
3419                         sctppcbinfo.ipi_gencnt_chunk++;
3420                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3421                                 panic("Chunk count is negative");
3422                         }
3423                         chk = TAILQ_FIRST(&outs->outqueue);
3424                 }
3425                 outs = TAILQ_FIRST(&asoc->out_wheel);
3426         }
3427
3428         if (asoc->pending_reply) {
3429                 FREE(asoc->pending_reply, M_PCB);
3430                 asoc->pending_reply = NULL;
3431         }
3432         chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3433         while (chk) {
3434                 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3435                 if (chk->data) {
3436                         sctp_m_freem(chk->data);
3437                         chk->data = NULL;
3438                 }
3439                 chk->whoTo = NULL;
3440                 chk->asoc = NULL;
3441                 /* Free the chunk */
3442                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3443                 sctppcbinfo.ipi_count_chunk--;
3444                 sctppcbinfo.ipi_gencnt_chunk++;
3445                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3446                         panic("Chunk count is negative");
3447                 }
3448                 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3449         }
3450         /* pending send queue SHOULD be empty */
3451         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3452                 chk = TAILQ_FIRST(&asoc->send_queue);
3453                 while (chk) {
3454                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3455                         if (chk->data) {
3456                                 sctp_m_freem(chk->data);
3457                                 chk->data = NULL;
3458                         }
3459                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3460                         sctppcbinfo.ipi_count_chunk--;
3461                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3462                                 panic("Chunk count is negative");
3463                         }
3464                         sctppcbinfo.ipi_gencnt_chunk++;
3465                         chk = TAILQ_FIRST(&asoc->send_queue);
3466                 }
3467         }
3468         /* sent queue SHOULD be empty */
3469         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3470                 chk = TAILQ_FIRST(&asoc->sent_queue);
3471                 while (chk) {
3472                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3473                         if (chk->data) {
3474                                 sctp_m_freem(chk->data);
3475                                 chk->data = NULL;
3476                         }
3477                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3478                         sctppcbinfo.ipi_count_chunk--;
3479                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3480                                 panic("Chunk count is negative");
3481                         }
3482                         sctppcbinfo.ipi_gencnt_chunk++;
3483                         chk = TAILQ_FIRST(&asoc->sent_queue);
3484                 }
3485         }
3486         /* control queue MAY not be empty */
3487         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3488                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3489                 while (chk) {
3490                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3491                         if (chk->data) {
3492                                 sctp_m_freem(chk->data);
3493                                 chk->data = NULL;
3494                         }
3495                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3496                         sctppcbinfo.ipi_count_chunk--;
3497                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3498                                 panic("Chunk count is negative");
3499                         }
3500                         sctppcbinfo.ipi_gencnt_chunk++;
3501                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3502                 }
3503         }
3504         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3505                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3506                 while (chk) {
3507                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3508                         if (chk->data) {
3509                                 sctp_m_freem(chk->data);
3510                                 chk->data = NULL;
3511                         }
3512                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3513                         sctppcbinfo.ipi_count_chunk--;
3514                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3515                                 panic("Chunk count is negative");
3516                         }
3517                         sctppcbinfo.ipi_gencnt_chunk++;
3518                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3519                 }
3520         }
3521         if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3522                 chk = TAILQ_FIRST(&asoc->delivery_queue);
3523                 while (chk) {
3524                         TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3525                         if (chk->data) {
3526                                 sctp_m_freem(chk->data);
3527                                 chk->data = NULL;
3528                         }
3529                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3530                         sctppcbinfo.ipi_count_chunk--;
3531                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3532                                 panic("Chunk count is negative");
3533                         }
3534                         sctppcbinfo.ipi_gencnt_chunk++;
3535                         chk = TAILQ_FIRST(&asoc->delivery_queue);
3536                 }
3537         }
3538         if (asoc->mapping_array) {
3539                 FREE(asoc->mapping_array, M_PCB);
3540                 asoc->mapping_array = NULL;
3541         }
3542
3543         /* the stream outs */
3544         if (asoc->strmout) {
3545                 FREE(asoc->strmout, M_PCB);
3546                 asoc->strmout = NULL;
3547         }
3548         asoc->streamoutcnt = 0;
3549         if (asoc->strmin) {
3550                 int i;
3551                 for (i = 0; i < asoc->streamincnt; i++) {
3552                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3553                                 /* We have somethings on the streamin queue */
3554                                 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3555                                 while (chk) {
3556                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3557                                             chk, sctp_next);
3558                                         if (chk->data) {
3559                                                 sctp_m_freem(chk->data);
3560                                                 chk->data = NULL;
3561                                         }
3562                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3563                                             chk);
3564                                         sctppcbinfo.ipi_count_chunk--;
3565                                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3566                                                 panic("Chunk count is negative");
3567                                         }
3568                                         sctppcbinfo.ipi_gencnt_chunk++;
3569                                         chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3570                                 }
3571                         }
3572                 }
3573                 FREE(asoc->strmin, M_PCB);
3574                 asoc->strmin = NULL;
3575         }
3576         asoc->streamincnt = 0;
3577         /* local addresses, if any */
3578         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3579                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3580                 LIST_REMOVE(laddr, sctp_nxt_addr);
3581                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3582                 sctppcbinfo.ipi_count_laddr--;
3583         }
3584         /* pending asconf (address) parameters */
3585         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3586                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3587                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3588                 FREE(aparam, M_PCB);
3589         }
3590         if (asoc->last_asconf_ack_sent != NULL) {
3591                 sctp_m_freem(asoc->last_asconf_ack_sent);
3592                 asoc->last_asconf_ack_sent = NULL;
3593         }
3594         /* Insert new items here :> */
3595
3596         /* Get rid of LOCK */
3597         SCTP_TCB_LOCK_DESTROY(stcb);
3598
3599         /* now clean up the tasoc itself */
3600         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3601         sctppcbinfo.ipi_count_asoc--;
3602         if ((inp->sctp_socket->so_snd.ssb_cc) ||
3603             (inp->sctp_socket->so_snd.ssb_mbcnt)) {
3604                 /* This will happen when a abort is done */
3605                 inp->sctp_socket->so_snd.ssb_cc = 0;
3606                 inp->sctp_socket->so_snd.ssb_mbcnt = 0;
3607         }
3608         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3609                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3610                         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3611                                 /*
3612                                  * For the base fd, that is NOT in TCP pool we
3613                                  * turn off the connected flag. This allows
3614                                  * non-listening endpoints to connect/shutdown/
3615                                  * connect.
3616                                  */
3617                                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3618                                 soisdisconnected(inp->sctp_socket);
3619                         }
3620                         /*
3621                          * For those that are in the TCP pool we just leave
3622                          * so it cannot be used. When they close the fd we
3623                          * will free it all.
3624                          */
3625                 }
3626         }
3627         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3628                 sctp_inpcb_free(inp, 0);
3629         }
3630         crit_exit();
3631 }
3632
3633
3634 /*
3635  * determine if a destination is "reachable" based upon the addresses
3636  * bound to the current endpoint (e.g. only v4 or v6 currently bound)
3637  */
3638 /*
3639  * FIX: if we allow assoc-level bindx(), then this needs to be fixed
3640  * to use assoc level v4/v6 flags, as the assoc *may* not have the
3641  * same address types bound as its endpoint
3642  */
3643 int
3644 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
3645 {
3646         struct sctp_inpcb *inp;
3647         int answer;
3648
3649         /* No locks here, the TCB, in all cases is already
3650          * locked and an assoc is up. There is either a
3651          * INP lock by the caller applied (in asconf case when
3652          * deleting an address) or NOT in the HB case, however
3653          * if HB then the INP increment is up and the INP
3654          * will not be removed (on top of the fact that
3655          * we have a TCB lock). So we only want to
3656          * read the sctp_flags, which is either bound-all
3657          * or not.. no protection needed since once an
3658          * assoc is up you can't be changing your binding.
3659          */
3660         inp = stcb->sctp_ep;
3661         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3662                 /* if bound all, destination is not restricted */
3663                 /* RRS: Question during lock work: Is this
3664                  * correct? If you are bound-all you still
3665                  * might need to obey the V4--V6 flags???
3666                  * IMO this bound-all stuff needs to be removed!
3667                  */
3668                 return (1);
3669         }
3670         /* NOTE: all "scope" checks are done when local addresses are added */
3671         if (destaddr->sa_family == AF_INET6) {
3672 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3673                 answer = inp->inp_vflag & INP_IPV6;
3674 #else
3675                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
3676 #endif
3677         } else if (destaddr->sa_family == AF_INET) {
3678 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3679                 answer = inp->inp_vflag & INP_IPV4;
3680 #else
3681                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
3682 #endif
3683         } else {
3684                 /* invalid family, so it's unreachable */
3685                 answer = 0;
3686         }
3687         return (answer);
3688 }
3689
3690 /*
3691  * update the inp_vflags on an endpoint
3692  */
3693 static void
3694 sctp_update_ep_vflag(struct sctp_inpcb *inp) {
3695         struct sctp_laddr *laddr;
3696
3697         /* first clear the flag */
3698 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3699         inp->inp_vflag = 0;
3700 #else
3701         inp->ip_inp.inp.inp_vflag = 0;
3702 #endif
3703         /* set the flag based on addresses on the ep list */
3704         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3705                 if (laddr->ifa == NULL) {
3706 #ifdef SCTP_DEBUG
3707                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3708                                 kprintf("An ounce of prevention is worth a pound of cure\n");
3709                         }
3710 #endif /* SCTP_DEBUG */
3711                         continue;
3712                 }
3713                 if (laddr->ifa->ifa_addr) {
3714                         continue;
3715                 }
3716                 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
3717 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3718                         inp->inp_vflag |= INP_IPV6;
3719 #else
3720                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3721 #endif
3722                 } else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
3723 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3724                         inp->inp_vflag |= INP_IPV4;
3725 #else
3726                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3727 #endif
3728                 }
3729         }
3730 }
3731
3732 /*
3733  * Add the address to the endpoint local address list
3734  * There is nothing to be done if we are bound to all addresses
3735  */
3736 int
3737 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3738 {
3739         struct sctp_laddr *laddr;
3740         int fnd, error;
3741         fnd = 0;
3742
3743         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3744                 /* You are already bound to all. You have it already */
3745                 return (0);
3746         }
3747         if (ifa->ifa_addr->sa_family == AF_INET6) {
3748                 struct in6_ifaddr *ifa6;
3749                 ifa6 = (struct in6_ifaddr *)ifa;
3750                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3751                     IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
3752                         /* Can't bind a non-existent addr. */
3753                         return (-1);
3754         }
3755         /* first, is it already present? */
3756         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3757                 if (laddr->ifa == ifa) {
3758                         fnd = 1;
3759                         break;
3760                 }
3761         }
3762
3763         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
3764                 /* Not bound to all */
3765                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
3766                 if (error != 0)
3767                         return (error);
3768                 inp->laddr_count++;
3769                 /* update inp_vflag flags */
3770                 if (ifa->ifa_addr->sa_family == AF_INET6) {
3771 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3772                         inp->inp_vflag |= INP_IPV6;
3773 #else
3774                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3775 #endif
3776                 } else if (ifa->ifa_addr->sa_family == AF_INET) {
3777 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3778                         inp->inp_vflag |= INP_IPV4;
3779 #else
3780                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3781 #endif
3782                 }
3783         }
3784         return (0);
3785 }
3786
3787
3788 /*
3789  * select a new (hopefully reachable) destination net
3790  * (should only be used when we deleted an ep addr that is the
3791  * only usable source address to reach the destination net)
3792  */
3793 static void
3794 sctp_select_primary_destination(struct sctp_tcb *stcb)
3795 {
3796         struct sctp_nets *net;
3797
3798         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3799                 /* for now, we'll just pick the first reachable one we find */
3800                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
3801                         continue;
3802                 if (sctp_destination_is_reachable(stcb,
3803                     (struct sockaddr *)&net->ro._l_addr)) {
3804                         /* found a reachable destination */
3805                         stcb->asoc.primary_destination = net;
3806                 }
3807         }
3808         /* I can't there from here! ...we're gonna die shortly... */
3809 }
3810
3811
3812 /*
3813  * Delete the address from the endpoint local address list
3814  * There is nothing to be done if we are bound to all addresses
3815  */
3816 int
3817 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3818 {
3819         struct sctp_laddr *laddr;
3820         int fnd;
3821         fnd = 0;
3822         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3823                 /* You are already bound to all. You have it already */
3824                 return (EINVAL);
3825         }
3826
3827         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3828                 if (laddr->ifa == ifa) {
3829                         fnd = 1;
3830                         break;
3831                 }
3832         }
3833         if (fnd && (inp->laddr_count < 2)) {
3834                 /* can't delete unless there are at LEAST 2 addresses */
3835                 return (-1);
3836         }
3837         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
3838                 /*
3839                  * clean up any use of this address
3840                  * go through our associations and clear any
3841                  *  last_used_address that match this one
3842                  * for each assoc, see if a new primary_destination is needed
3843                  */
3844                 struct sctp_tcb *stcb;
3845
3846                 /* clean up "next_addr_touse" */
3847                 if (inp->next_addr_touse == laddr)
3848                         /* delete this address */
3849                         inp->next_addr_touse = NULL;
3850
3851                 /* clean up "last_used_address" */
3852                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3853                         if (stcb->asoc.last_used_address == laddr)
3854                                 /* delete this address */
3855                                 stcb->asoc.last_used_address = NULL;
3856                 } /* for each tcb */
3857
3858                 /* remove it from the ep list */
3859                 sctp_remove_laddr(laddr);
3860                 inp->laddr_count--;
3861                 /* update inp_vflag flags */
3862                 sctp_update_ep_vflag(inp);
3863                 /* select a new primary destination if needed */
3864                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3865                         /* presume caller (sctp_asconf.c) already owns INP lock */
3866                         SCTP_TCB_LOCK(stcb);
3867                         if (sctp_destination_is_reachable(stcb,
3868                             (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr) == 0) {
3869                                 sctp_select_primary_destination(stcb);
3870                         }
3871                         SCTP_TCB_UNLOCK(stcb);
3872                 } /* for each tcb */
3873         }
3874         return (0);
3875 }
3876
3877 /*
3878  * Add the addr to the TCB local address list
3879  * For the BOUNDALL or dynamic case, this is a "pending" address list
3880  * (eg. addresses waiting for an ASCONF-ACK response)
3881  * For the subset binding, static case, this is a "valid" address list
3882  */
3883 int
3884 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3885 {
3886         struct sctp_inpcb *inp;
3887         struct sctp_laddr *laddr;
3888         int error;
3889
3890         /* Assumes TCP is locked.. and possiblye
3891          * the INP. May need to confirm/fix that if
3892          * we need it and is not the case.
3893          */
3894         inp = stcb->sctp_ep;
3895         if (ifa->ifa_addr->sa_family == AF_INET6) {
3896                 struct in6_ifaddr *ifa6;
3897                 ifa6 = (struct in6_ifaddr *)ifa;
3898                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3899                     /* IN6_IFF_DEPRECATED | */
3900                     IN6_IFF_ANYCAST |
3901                     IN6_IFF_NOTREADY))
3902                         /* Can't bind a non-existent addr. */
3903                         return (-1);
3904         }
3905         /* does the address already exist? */
3906         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3907                 if (laddr->ifa == ifa) {
3908                         return (-1);
3909                 }
3910         }
3911
3912         /* add to the list */
3913         error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
3914         if (error != 0)
3915                 return (error);
3916         return (0);
3917 }
3918
3919 /*
3920  * insert an laddr entry with the given ifa for the desired list
3921  */
3922 int
3923 sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa) {
3924         struct sctp_laddr *laddr;
3925
3926         crit_enter();
3927         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
3928         if (laddr == NULL) {
3929                 /* out of memory? */
3930                 crit_exit();
3931                 return (EINVAL);
3932         }
3933         sctppcbinfo.ipi_count_laddr++;
3934         sctppcbinfo.ipi_gencnt_laddr++;
3935         bzero(laddr, sizeof(*laddr));
3936         laddr->ifa = ifa;
3937         /* insert it */
3938         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
3939
3940         crit_exit();
3941         return (0);
3942 }
3943
3944 /*
3945  * Remove an laddr entry from the local address list (on an assoc)
3946  */
3947 void
3948 sctp_remove_laddr(struct sctp_laddr *laddr)
3949 {
3950         crit_enter();
3951         /* remove from the list */
3952         LIST_REMOVE(laddr, sctp_nxt_addr);
3953         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3954         sctppcbinfo.ipi_count_laddr--;
3955         sctppcbinfo.ipi_gencnt_laddr++;
3956         crit_exit();
3957 }
3958
3959 /*
3960  * Remove an address from the TCB local address list
3961  */
3962 int
3963 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3964 {
3965         struct sctp_inpcb *inp;
3966         struct sctp_laddr *laddr;
3967
3968         /* This is called by asconf work. It is assumed that
3969          * a) The TCB is locked
3970          * and
3971          * b) The INP is locked.
3972          * This is true in as much as I can trace through
3973          * the entry asconf code where I did these locks.
3974          * Again, the ASCONF code is a bit different in
3975          * that it does lock the INP during its work often
3976          * times. This must be since we don't want other
3977          * proc's looking up things while what they are
3978          * looking up is changing :-D
3979          */
3980
3981         inp = stcb->sctp_ep;
3982         /* if subset bound and don't allow ASCONF's, can't delete last */
3983         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
3984             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
3985                 if (stcb->asoc.numnets < 2) {
3986                         /* can't delete last address */
3987                         return (-1);
3988                 }
3989         }
3990
3991         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3992                 /* remove the address if it exists */
3993                 if (laddr->ifa == NULL)
3994                         continue;
3995                 if (laddr->ifa == ifa) {
3996                         sctp_remove_laddr(laddr);
3997                         return (0);
3998                 }
3999         }
4000
4001         /* address not found! */
4002         return (-1);
4003 }
4004
4005 /*
4006  * Remove an address from the TCB local address list
4007  * lookup using a sockaddr addr
4008  */
4009 int
4010 sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
4011 {
4012         struct sctp_inpcb *inp;
4013         struct sctp_laddr *laddr;
4014         struct sockaddr *l_sa;
4015
4016         /*
4017          * This function I find does not seem to have a caller.
4018          * As such we NEED TO DELETE this code. If we do
4019          * find a caller, the caller MUST have locked the TCB
4020          * at the least and probably the INP as well.
4021          */
4022         inp = stcb->sctp_ep;
4023         /* if subset bound and don't allow ASCONF's, can't delete last */
4024         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4025             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4026                 if (stcb->asoc.numnets < 2) {
4027                         /* can't delete last address */
4028                         return (-1);
4029                 }
4030         }
4031
4032         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4033                 /* make sure the address exists */
4034                 if (laddr->ifa == NULL)
4035                         continue;
4036                 if (laddr->ifa->ifa_addr == NULL)
4037                         continue;
4038
4039                 l_sa = laddr->ifa->ifa_addr;
4040                 if (l_sa->sa_family == AF_INET6) {
4041                         /* IPv6 address */
4042                         struct sockaddr_in6 *sin1, *sin2;
4043                         sin1 = (struct sockaddr_in6 *)l_sa;
4044                         sin2 = (struct sockaddr_in6 *)sa;
4045                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4046                             sizeof(struct in6_addr)) == 0) {
4047                                 /* matched */
4048                                 sctp_remove_laddr(laddr);
4049                                 return (0);
4050                         }
4051                 } else if (l_sa->sa_family == AF_INET) {
4052                         /* IPv4 address */
4053                         struct sockaddr_in *sin1, *sin2;
4054                         sin1 = (struct sockaddr_in *)l_sa;
4055                         sin2 = (struct sockaddr_in *)sa;
4056                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4057                                 /* matched */
4058                                 sctp_remove_laddr(laddr);
4059                                 return (0);
4060                         }
4061                 } else {
4062                         /* invalid family */
4063                         return (-1);
4064                 }
4065         } /* end foreach */
4066         /* address not found! */
4067         return (-1);
4068 }
4069
4070 static char sctp_pcb_initialized = 0;
4071
4072 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4073 /* sysctl */
4074 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4075 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4076
4077 #endif /* FreeBSD || APPLE || DragonFly */
4078
4079 #ifndef SCTP_TCBHASHSIZE
4080 #define SCTP_TCBHASHSIZE 1024
4081 #endif
4082
4083 #ifndef SCTP_CHUNKQUEUE_SCALE
4084 #define SCTP_CHUNKQUEUE_SCALE 10
4085 #endif
4086
4087 void
4088 sctp_pcb_init(void)
4089 {
4090         /*
4091          * SCTP initialization for the PCB structures
4092          * should be called by the sctp_init() funciton.
4093          */
4094         int i;
4095         int hashtblsize = SCTP_TCBHASHSIZE;
4096
4097 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4098         int sctp_chunkscale = SCTP_CHUNKQUEUE_SCALE;
4099 #endif
4100
4101         if (sctp_pcb_initialized != 0) {
4102                 /* error I was called twice */
4103                 return;
4104         }
4105         sctp_pcb_initialized = 1;
4106
4107         /* Init all peg counts */
4108         for (i = 0; i < SCTP_NUMBER_OF_PEGS; i++) {
4109                 sctp_pegs[i] = 0;
4110         }
4111
4112         /* init the empty list of (All) Endpoints */
4113         LIST_INIT(&sctppcbinfo.listhead);
4114
4115         /* init the iterator head */
4116         LIST_INIT(&sctppcbinfo.iteratorhead);
4117
4118         /* init the hash table of endpoints */
4119 #if defined(__FreeBSD__)
4120 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
4121         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &hashtblsize);
4122         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4123         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4124 #else
4125         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
4126             hashtblsize);
4127         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
4128             sctp_pcbtblsize);
4129         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
4130             sctp_chunkscale);
4131 #endif
4132 #endif
4133
4134         sctppcbinfo.sctp_asochash = hashinit((hashtblsize * 31),
4135 #ifdef __NetBSD__
4136             HASH_LIST,
4137 #endif
4138             M_PCB,
4139 #if defined(__NetBSD__) || defined(__OpenBSD__)
4140             M_WAITOK,
4141 #endif
4142             &sctppcbinfo.hashasocmark);
4143
4144         sctppcbinfo.sctp_ephash = hashinit(hashtblsize,
4145 #ifdef __NetBSD__
4146             HASH_LIST,
4147 #endif
4148             M_PCB,
4149 #if defined(__NetBSD__) || defined(__OpenBSD__)
4150             M_WAITOK,
4151 #endif
4152             &sctppcbinfo.hashmark);
4153
4154         sctppcbinfo.sctp_tcpephash = hashinit(hashtblsize,
4155 #ifdef __NetBSD__
4156             HASH_LIST,
4157 #endif
4158             M_PCB,
4159 #if defined(__NetBSD__) || defined(__OpenBSD__)
4160             M_WAITOK,
4161 #endif
4162             &sctppcbinfo.hashtcpmark);
4163
4164         sctppcbinfo.hashtblsize = hashtblsize;
4165
4166         /* init the zones */
4167         /*
4168          * FIX ME: Should check for NULL returns, but if it does fail we
4169          * are doomed to panic anyways... add later maybe.
4170          */
4171         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4172             sizeof(struct sctp_inpcb), maxsockets);
4173
4174         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4175             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4176
4177         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4178             sizeof(struct sctp_laddr),
4179             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4180
4181         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4182             sizeof(struct sctp_nets),
4183             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4184
4185         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4186             sizeof(struct sctp_tmit_chunk),
4187             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4188             sctp_chunkscale));
4189
4190         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_sockq, "sctp_sockq",
4191             sizeof(struct sctp_socket_q_list),
4192             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4193             sctp_chunkscale));
4194
4195         /* Master Lock INIT for info structure */
4196         SCTP_INP_INFO_LOCK_INIT();
4197         SCTP_ITERATOR_LOCK_INIT();
4198         /* not sure if we need all the counts */
4199         sctppcbinfo.ipi_count_ep = 0;
4200         sctppcbinfo.ipi_gencnt_ep = 0;
4201         /* assoc/tcb zone info */
4202         sctppcbinfo.ipi_count_asoc = 0;
4203         sctppcbinfo.ipi_gencnt_asoc = 0;
4204         /* local addrlist zone info */
4205         sctppcbinfo.ipi_count_laddr = 0;
4206         sctppcbinfo.ipi_gencnt_laddr = 0;
4207         /* remote addrlist zone info */
4208         sctppcbinfo.ipi_count_raddr = 0;
4209         sctppcbinfo.ipi_gencnt_raddr = 0;
4210         /* chunk info */
4211         sctppcbinfo.ipi_count_chunk = 0;
4212         sctppcbinfo.ipi_gencnt_chunk = 0;
4213
4214         /* socket queue zone info */
4215         sctppcbinfo.ipi_count_sockq = 0;
4216         sctppcbinfo.ipi_gencnt_sockq = 0;
4217
4218         /* mbuf tracker */
4219         sctppcbinfo.mbuf_track = 0;
4220         /* port stuff */
4221 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) \
4222     || defined(__DragonFly__)
4223         sctppcbinfo.lastlow = ipport_firstauto;
4224 #else
4225         sctppcbinfo.lastlow = anonportmin;
4226 #endif
4227         /* Init the TIMEWAIT list */
4228         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4229                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4230         }
4231
4232 #if defined(_SCTP_NEEDS_CALLOUT_) && !defined(__APPLE__)
4233         TAILQ_INIT(&sctppcbinfo.callqueue);
4234 #endif
4235
4236 }
4237
4238 int
4239 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4240     int iphlen, int offset, int limit, struct sctphdr *sh,
4241     struct sockaddr *altsa)
4242 {
4243         /*
4244          * grub through the INIT pulling addresses and
4245          * loading them to the nets structure in the asoc.
4246          * The from address in the mbuf should also be loaded
4247          * (if it is not already). This routine can be called
4248          * with either INIT or INIT-ACK's as long as the
4249          * m points to the IP packet and the offset points
4250          * to the beginning of the parameters.
4251          */
4252         struct sctp_inpcb *inp, *l_inp;
4253         struct sctp_nets *net, *net_tmp;
4254         struct ip *iph;
4255         struct sctp_paramhdr *phdr, parm_buf;
4256         struct sctp_tcb *stcb_tmp;
4257         u_int16_t ptype, plen;
4258         struct sockaddr *sa;
4259         struct sockaddr_storage dest_store;
4260         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4261         struct sockaddr_in sin;
4262         struct sockaddr_in6 sin6;
4263
4264         /* First get the destination address setup too. */
4265         memset(&sin, 0, sizeof(sin));
4266         memset(&sin6, 0, sizeof(sin6));
4267
4268         sin.sin_family = AF_INET;
4269         sin.sin_len = sizeof(sin);
4270         sin.sin_port = stcb->rport;
4271
4272         sin6.sin6_family = AF_INET6;
4273         sin6.sin6_len = sizeof(struct sockaddr_in6);
4274         sin6.sin6_port = stcb->rport;
4275         if (altsa == NULL) {
4276                 iph = mtod(m, struct ip *);
4277                 if (iph->ip_v == IPVERSION) {
4278                         /* its IPv4 */
4279                         struct sockaddr_in *sin_2;
4280                         sin_2 = (struct sockaddr_in *)(local_sa);
4281                         memset(sin_2, 0, sizeof(sin));
4282                         sin_2->sin_family = AF_INET;
4283                         sin_2->sin_len = sizeof(sin);
4284                         sin_2->sin_port = sh->dest_port;
4285                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr ;
4286                         sin.sin_addr = iph->ip_src;
4287                         sa = (struct sockaddr *)&sin;
4288                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4289                         /* its IPv6 */
4290                         struct ip6_hdr *ip6;
4291                         struct sockaddr_in6 *sin6_2;
4292
4293                         ip6 = mtod(m, struct ip6_hdr *);
4294                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4295                         memset(sin6_2, 0, sizeof(sin6));
4296                         sin6_2->sin6_family = AF_INET6;
4297                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4298                         sin6_2->sin6_port = sh->dest_port;
4299                         sin6.sin6_addr = ip6->ip6_src;
4300                         sa = (struct sockaddr *)&sin6;
4301                 } else {
4302                         sa = NULL;
4303                 }
4304         } else {
4305                 /*
4306                  * For cookies we use the src address NOT from the packet
4307                  * but from the original INIT
4308                  */
4309                 sa = altsa;
4310         }
4311         /* Turn off ECN until we get through all params */
4312         stcb->asoc.ecn_allowed = 0;
4313
4314         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4315                 /* mark all addresses that we have currently on the list */
4316                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4317         }
4318         /* does the source address already exist? if so skip it */
4319         l_inp = inp = stcb->sctp_ep;
4320         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4321         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4322                 /* we must add the source address */
4323                 /* no scope set here since we have a tcb already. */
4324                 if ((sa->sa_family == AF_INET) &&
4325                     (stcb->asoc.ipv4_addr_legal)) {
4326                         if (sctp_add_remote_addr(stcb, sa, 0, 2)) {
4327                                 return (-1);
4328                         }
4329                 } else if ((sa->sa_family == AF_INET6) &&
4330                     (stcb->asoc.ipv6_addr_legal)) {
4331                         if (sctp_add_remote_addr(stcb, sa, 0, 3)) {
4332                                 return (-1);
4333                         }
4334                 }
4335         } else {
4336                 if (net_tmp != NULL && stcb_tmp == stcb) {
4337                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4338                 } else if (stcb_tmp != stcb) {
4339                         /* It belongs to another association? */
4340                         return (-1);
4341                 }
4342         }
4343         /* since a unlock occured we must check the
4344          * TCB's state and the pcb's gone flags.
4345          */
4346         if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4347                 /* the user freed the ep */
4348                 return (-1);
4349         }
4350         if (stcb->asoc.state == 0) {
4351                 /* the assoc was freed? */
4352                 return (-1);
4353         }
4354
4355         /* now we must go through each of the params. */
4356         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4357         while (phdr) {
4358                 ptype = ntohs(phdr->param_type);
4359                 plen = ntohs(phdr->param_length);
4360                 /*kprintf("ptype => %d, plen => %d\n", ptype, plen);*/
4361                 if (offset + plen > limit) {
4362                         break;
4363                 }
4364                 if (plen == 0) {
4365                         break;
4366                 }
4367                 if ((ptype == SCTP_IPV4_ADDRESS) &&
4368                     (stcb->asoc.ipv4_addr_legal)) {
4369                         struct sctp_ipv4addr_param *p4, p4_buf;
4370                         /* ok get the v4 address and check/add */
4371                         phdr = sctp_get_next_param(m, offset,
4372                             (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4373                         if (plen != sizeof(struct sctp_ipv4addr_param) ||
4374                             phdr == NULL) {
4375                                 return (-1);
4376                         }
4377                         p4 = (struct sctp_ipv4addr_param *)phdr;
4378                         sin.sin_addr.s_addr = p4->addr;
4379                         sa = (struct sockaddr *)&sin;
4380                         inp = stcb->sctp_ep;
4381                         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4382                             local_sa, stcb);
4383
4384                         if ((stcb_tmp== NULL && inp == stcb->sctp_ep) ||
4385                             inp == NULL) {
4386                                 /* we must add the source address */
4387                                 /* no scope set since we have a tcb already */
4388
4389                                 /* we must validate the state again here */
4390                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4391                                         /* the user freed the ep */
4392                                         return (-1);
4393                                 }
4394                                 if (stcb->asoc.state == 0) {
4395                                         /* the assoc was freed? */
4396                                         return (-1);
4397                                 }
4398                                 if (sctp_add_remote_addr(stcb, sa, 0, 4)) {
4399                                         return (-1);
4400                                 }
4401                         } else if (stcb_tmp == stcb) {
4402                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4403                                         /* the user freed the ep */
4404                                         return (-1);
4405                                 }
4406                                 if (stcb->asoc.state == 0) {
4407                                         /* the assoc was freed? */
4408                                         return (-1);
4409                                 }
4410                                 if (net != NULL) {
4411                                         /* clear flag */
4412                                         net->dest_state &=
4413                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4414                                 }
4415                         } else {
4416                                 /* strange, address is in another assoc?
4417                                  * straighten out locks.
4418                                  */
4419                                 SCTP_TCB_UNLOCK(stcb_tmp);
4420                                 SCTP_INP_RLOCK(inp);
4421                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4422                                         /* the user freed the ep */
4423                                         SCTP_INP_RUNLOCK(l_inp);
4424                                         return (-1);
4425                                 }
4426                                 if (stcb->asoc.state == 0) {
4427                                         /* the assoc was freed? */
4428                                         SCTP_INP_RUNLOCK(l_inp);
4429                                         return (-1);
4430                                 }
4431                                 SCTP_TCB_LOCK(stcb);
4432                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
4433                                 return (-1);
4434                         }
4435                 } else if ((ptype == SCTP_IPV6_ADDRESS) &&
4436                     (stcb->asoc.ipv6_addr_legal)) {
4437                         /* ok get the v6 address and check/add */
4438                         struct sctp_ipv6addr_param *p6, p6_buf;
4439                         phdr = sctp_get_next_param(m, offset,
4440                             (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4441                         if (plen != sizeof(struct sctp_ipv6addr_param) ||
4442                             phdr == NULL) {
4443                                 return (-1);
4444                         }
4445                         p6 = (struct sctp_ipv6addr_param *)phdr;
4446                         memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4447                             sizeof(p6->addr));
4448                         sa = (struct sockaddr *)&sin6;
4449                         inp = stcb->sctp_ep;
4450                         stcb_tmp= sctp_findassociation_ep_addr(&inp, sa, &net,
4451                             local_sa, stcb);
4452                         if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4453                             inp == NULL)) {
4454                                 /* we must validate the state again here */
4455                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4456                                         /* the user freed the ep */
4457                                         return (-1);
4458                                 }
4459                                 if (stcb->asoc.state == 0) {
4460                                         /* the assoc was freed? */
4461                                         return (-1);
4462                                 }
4463                                 /* we must add the address, no scope set */
4464                                 if (sctp_add_remote_addr(stcb, sa, 0, 5)) {
4465                                         return (-1);
4466                                 }
4467                         } else if (stcb_tmp == stcb) {
4468                                 /* we must validate the state again here */
4469                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4470                                         /* the user freed the ep */
4471                                         return (-1);
4472                                 }
4473                                 if (stcb->asoc.state == 0) {
4474                                         /* the assoc was freed? */
4475                                         return (-1);
4476                                 }
4477                                 if (net != NULL) {
4478                                         /* clear flag */
4479                                         net->dest_state &=
4480                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4481                                 }
4482                         } else {
4483                                 /* strange, address is in another assoc?
4484                                  * straighten out locks.
4485                                  */
4486                                 SCTP_TCB_UNLOCK(stcb_tmp);
4487                                 SCTP_INP_RLOCK(l_inp);
4488                                 /* we must validate the state again here */
4489                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4490                                         /* the user freed the ep */
4491                                         SCTP_INP_RUNLOCK(l_inp);
4492                                         return (-1);
4493                                 }
4494                                 if (stcb->asoc.state == 0) {
4495                                         /* the assoc was freed? */
4496                                         SCTP_INP_RUNLOCK(l_inp);
4497                                         return (-1);
4498                                 }
4499                                 SCTP_TCB_LOCK(stcb);
4500                                 SCTP_INP_RUNLOCK(l_inp);
4501                                 return (-1);
4502                         }
4503                 } else if (ptype == SCTP_ECN_CAPABLE) {
4504                         stcb->asoc.ecn_allowed = 1;
4505                 } else if (ptype == SCTP_ULP_ADAPTION) {
4506                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
4507                                 struct sctp_adaption_layer_indication ai, *aip;
4508
4509                                 phdr = sctp_get_next_param(m, offset,
4510                                                            (struct sctp_paramhdr *)&ai, sizeof(ai));
4511                                 aip = (struct sctp_adaption_layer_indication *)phdr;
4512                                 sctp_ulp_notify(SCTP_NOTIFY_ADAPTION_INDICATION,
4513                                                 stcb, ntohl(aip->indication), NULL);
4514                         }
4515                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4516                         struct sctp_asconf_addr_param lstore, *fee;
4517                         struct sctp_asconf_addrv4_param *fii;
4518                         int lptype;
4519                         struct sockaddr *lsa = NULL;
4520
4521                         stcb->asoc.peer_supports_asconf = 1;
4522                         stcb->asoc.peer_supports_asconf_setprim = 1;
4523                         if (plen > sizeof(lstore)) {
4524                                 return (-1);
4525                         }
4526                         phdr = sctp_get_next_param(m, offset,
4527                             (struct sctp_paramhdr *)&lstore, plen);
4528                         if (phdr == NULL) {
4529                                 return (-1);
4530                         }
4531
4532                         fee  = (struct sctp_asconf_addr_param *)phdr;
4533                         lptype = ntohs(fee->addrp.ph.param_type);
4534                         if (lptype == SCTP_IPV4_ADDRESS) {
4535                                 if (plen !=
4536                                     sizeof(struct sctp_asconf_addrv4_param)) {
4537                                         kprintf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4538                                            (int)sizeof(struct sctp_asconf_addrv4_param),
4539                                            plen);
4540                                 } else {
4541                                         fii = (struct sctp_asconf_addrv4_param *)fee;
4542                                         sin.sin_addr.s_addr = fii->addrp.addr;
4543                                         lsa = (struct sockaddr *)&sin;
4544                                 }
4545                         } else if (lptype == SCTP_IPV6_ADDRESS) {
4546                                 if (plen !=
4547                                     sizeof(struct sctp_asconf_addr_param)) {
4548                                         kprintf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4549                                            (int)sizeof(struct sctp_asconf_addr_param),
4550                                            plen);
4551                                 } else {
4552                                         memcpy(sin6.sin6_addr.s6_addr,
4553                                             fee->addrp.addr,
4554                                             sizeof(fee->addrp.addr));
4555                                         lsa = (struct sockaddr *)&sin6;
4556                                 }
4557                         }
4558                         if (lsa) {
4559                                 sctp_set_primary_addr(stcb, sa, NULL);
4560                         }
4561
4562                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4563                         /* Peer supports pr-sctp */
4564                         stcb->asoc.peer_supports_prsctp = 1;
4565                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4566                         /* A supported extension chunk */
4567                         struct sctp_supported_chunk_types_param *pr_supported;
4568                         uint8_t local_store[128];
4569                         int num_ent, i;
4570
4571                         phdr = sctp_get_next_param(m, offset,
4572                             (struct sctp_paramhdr *)&local_store, plen);
4573                         if (phdr == NULL) {
4574                                 return (-1);
4575                         }
4576                         stcb->asoc.peer_supports_asconf = 0;
4577                         stcb->asoc.peer_supports_asconf_setprim = 0;
4578                         stcb->asoc.peer_supports_prsctp = 0;
4579                         stcb->asoc.peer_supports_pktdrop = 0;
4580                         stcb->asoc.peer_supports_strreset = 0;
4581                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4582                         num_ent = plen - sizeof(struct sctp_paramhdr);
4583                         for (i=0; i<num_ent; i++) {
4584                                 switch (pr_supported->chunk_types[i]) {
4585                                 case SCTP_ASCONF:
4586                                         stcb->asoc.peer_supports_asconf = 1;
4587                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4588                                         break;
4589                                 case SCTP_ASCONF_ACK:
4590                                         stcb->asoc.peer_supports_asconf = 1;
4591                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4592                                         break;
4593                                 case SCTP_FORWARD_CUM_TSN:
4594                                         stcb->asoc.peer_supports_prsctp = 1;
4595                                         break;
4596                                 case SCTP_PACKET_DROPPED:
4597                                         stcb->asoc.peer_supports_pktdrop = 1;
4598                                         break;
4599                                 case SCTP_STREAM_RESET:
4600                                         stcb->asoc.peer_supports_strreset = 1;
4601                                         break;
4602                                 default:
4603                                         /* one I have not learned yet */
4604                                         break;
4605
4606                                 }
4607                         }
4608                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4609                         /* Peer supports ECN-nonce */
4610                         stcb->asoc.peer_supports_ecn_nonce = 1;
4611                         stcb->asoc.ecn_nonce_allowed = 1;
4612                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4613                            (ptype == SCTP_STATE_COOKIE) ||
4614                            (ptype == SCTP_UNRECOG_PARAM) ||
4615                            (ptype == SCTP_COOKIE_PRESERVE) ||
4616                            (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4617                            (ptype == SCTP_ADD_IP_ADDRESS) ||
4618                            (ptype == SCTP_DEL_IP_ADDRESS) ||
4619                            (ptype == SCTP_ERROR_CAUSE_IND) ||
4620                            (ptype == SCTP_SUCCESS_REPORT)) {
4621                         /* don't care */;
4622                 } else {
4623                         if ((ptype & 0x8000) == 0x0000) {
4624                                 /* must stop processing the rest of
4625                                  * the param's. Any report bits were
4626                                  * handled with the call to sctp_arethere_unrecognized_parameters()
4627                                  * when the INIT or INIT-ACK was first seen.
4628                                  */
4629                                 break;
4630                         }
4631                 }
4632                 offset += SCTP_SIZE32(plen);
4633                 if (offset >= limit) {
4634                         break;
4635                 }
4636                 phdr = sctp_get_next_param(m, offset, &parm_buf,
4637                     sizeof(parm_buf));
4638         }
4639         /* Now check to see if we need to purge any addresses */
4640         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
4641                 net_tmp = TAILQ_NEXT(net, sctp_next);
4642                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
4643                     SCTP_ADDR_NOT_IN_ASSOC) {
4644                         /* This address has been removed from the asoc */
4645                         /* remove and free it */
4646                         stcb->asoc.numnets--;
4647                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
4648                         sctp_free_remote_addr(net);
4649                         if (net == stcb->asoc.primary_destination) {
4650                                 stcb->asoc.primary_destination = NULL;
4651                                 sctp_select_primary_destination(stcb);
4652                         }
4653                 }
4654         }
4655         return (0);
4656 }
4657
4658 int
4659 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
4660     struct sctp_nets *net)
4661 {
4662         /* make sure the requested primary address exists in the assoc */
4663         if (net == NULL && sa)
4664                 net = sctp_findnet(stcb, sa);
4665
4666         if (net == NULL) {
4667                 /* didn't find the requested primary address! */
4668                 return (-1);
4669         } else {
4670                 /* set the primary address */
4671                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
4672                         /* Must be confirmed */
4673                         return (-1);
4674                 }
4675                 stcb->asoc.primary_destination = net;
4676                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
4677                 return (0);
4678         }
4679 }
4680
4681
4682 int
4683 sctp_is_vtag_good(struct sctp_inpcb *inp, u_int32_t tag, struct timeval *now)
4684 {
4685         /*
4686          * This function serves two purposes. It will see if a TAG can be
4687          * re-used and return 1 for yes it is ok and 0 for don't use that
4688          * tag.
4689          * A secondary function it will do is purge out old tags that can
4690          * be removed.
4691          */
4692         struct sctpasochead *head;
4693         struct sctpvtaghead *chain;
4694         struct sctp_tagblock *twait_block;
4695         struct sctp_tcb *stcb;
4696
4697         int i;
4698         SCTP_INP_INFO_WLOCK();
4699         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4700         /* First is the vtag in use ? */
4701
4702         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
4703             sctppcbinfo.hashasocmark)];
4704         if (head == NULL) {
4705                 SCTP_INP_INFO_WUNLOCK();
4706                 return (0);
4707         }
4708         LIST_FOREACH(stcb, head, sctp_asocs) {
4709                 if (stcb->asoc.my_vtag == tag) {
4710                         /* We should remove this if and
4711                          * return 0 always if we want vtags
4712                          * unique across all endpoints. For
4713                          * now within a endpoint is ok.
4714                          */
4715                         if (inp == stcb->sctp_ep) {
4716                                 /* bad tag, in use */
4717                                 SCTP_INP_INFO_WUNLOCK();
4718                                 return (0);
4719                         }
4720                 }
4721         }
4722         if (!LIST_EMPTY(chain)) {
4723                 /*
4724                  * Block(s) are present, lets see if we have this tag in
4725                  * the list
4726                  */
4727                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4728                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4729                                 if (twait_block->vtag_block[i].v_tag == 0) {
4730                                         /* not used */
4731                                         continue;
4732                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
4733                                     now->tv_sec) {
4734                                         /* Audit expires this guy */
4735                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4736                                         twait_block->vtag_block[i].v_tag = 0;
4737                                 } else if (twait_block->vtag_block[i].v_tag ==
4738                                     tag) {
4739                                         /* Bad tag, sorry :< */
4740                                         SCTP_INP_INFO_WUNLOCK();
4741                                         return (0);
4742                                 }
4743                         }
4744                 }
4745         }
4746         /* Not found, ok to use the tag */
4747         SCTP_INP_INFO_WUNLOCK();
4748         return (1);
4749 }
4750
4751
4752 /*
4753  * Delete the address from the endpoint local address list
4754  * Lookup using a sockaddr address (ie. not an ifaddr)
4755  */
4756 int
4757 sctp_del_local_addr_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa)
4758 {
4759         struct sctp_laddr *laddr;
4760         struct sockaddr *l_sa;
4761         int found = 0;
4762         /* Here is another function I cannot find a
4763          * caller for. As such we SHOULD delete it
4764          * if we have no users. If we find a user that
4765          * user MUST have the INP locked.
4766          *
4767          */
4768
4769         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4770                 /* You are already bound to all. You have it already */
4771                 return (EINVAL);
4772         }
4773
4774         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4775                 /* make sure the address exists */
4776                 if (laddr->ifa == NULL)
4777                         continue;
4778                 if (laddr->ifa->ifa_addr == NULL)
4779                         continue;
4780
4781                 l_sa = laddr->ifa->ifa_addr;
4782                 if (l_sa->sa_family == AF_INET6) {
4783                         /* IPv6 address */
4784                         struct sockaddr_in6 *sin1, *sin2;
4785                         sin1 = (struct sockaddr_in6 *)l_sa;
4786                         sin2 = (struct sockaddr_in6 *)sa;
4787                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4788                             sizeof(struct in6_addr)) == 0) {
4789                                 /* matched */
4790                                 found = 1;
4791                                 break;
4792                         }
4793                 } else if (l_sa->sa_family == AF_INET) {
4794                         /* IPv4 address */
4795                         struct sockaddr_in *sin1, *sin2;
4796                         sin1 = (struct sockaddr_in *)l_sa;
4797                         sin2 = (struct sockaddr_in *)sa;
4798                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4799                                 /* matched */
4800                                 found = 1;
4801                                 break;
4802                         }
4803                 } else {
4804                         /* invalid family */
4805                         return (-1);
4806                 }
4807         }
4808
4809         if (found && inp->laddr_count < 2) {
4810                 /* can't delete unless there are at LEAST 2 addresses */
4811                 return (-1);
4812         }
4813
4814         if (found && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
4815                 /*
4816                  * remove it from the ep list, this should NOT be
4817                  * done until its really gone from the interface list and
4818                  * we won't be receiving more of these. Probably right
4819                  * away. If we do allow a removal of an address from
4820                  * an association (sub-set bind) than this should NOT
4821                  * be called until the all ASCONF come back from this
4822                  * association.
4823                  */
4824                 sctp_remove_laddr(laddr);
4825                 return (0);
4826         } else {
4827                 return (-1);
4828         }
4829 }
4830
4831 static void
4832 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4833 {
4834         /*
4835          * We must hunt this association for MBUF's past the cumack
4836          * (i.e. out of order data that we can renege on).
4837          */
4838         struct sctp_association *asoc;
4839         struct sctp_tmit_chunk *chk, *nchk;
4840         u_int32_t cumulative_tsn_p1, tsn;
4841         int cnt, strmat, gap;
4842         /* We look for anything larger than the cum-ack + 1 */
4843
4844         asoc = &stcb->asoc;
4845         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
4846         cnt = 0;
4847         /* First look in the re-assembly queue */
4848         chk = TAILQ_FIRST(&asoc->reasmqueue);
4849         while (chk) {
4850                 /* Get the next one */
4851                 nchk = TAILQ_NEXT(chk, sctp_next);
4852                 if (compare_with_wrap(chk->rec.data.TSN_seq,
4853                     cumulative_tsn_p1, MAX_TSN)) {
4854                         /* Yep it is above cum-ack */
4855                         cnt++;
4856                         tsn = chk->rec.data.TSN_seq;
4857                         if (tsn >= asoc->mapping_array_base_tsn) {
4858                                 gap  = tsn - asoc->mapping_array_base_tsn;
4859                         } else {
4860                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
4861                                     tsn + 1;
4862                         }
4863                         asoc->size_on_reasm_queue -= chk->send_size;
4864                         asoc->cnt_on_reasm_queue--;
4865                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
4866                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4867                         if (chk->data) {
4868                                 sctp_m_freem(chk->data);
4869                                 chk->data = NULL;
4870                         }
4871                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4872                         sctppcbinfo.ipi_count_chunk--;
4873                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4874                                 panic("Chunk count is negative");
4875                         }
4876                         sctppcbinfo.ipi_gencnt_chunk++;
4877                 }
4878                 chk = nchk;
4879         }
4880         /* Ok that was fun, now we will drain all the inbound streams? */
4881         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
4882                 chk = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
4883                 while (chk) {
4884                         nchk = TAILQ_NEXT(chk, sctp_next);
4885                         if (compare_with_wrap(chk->rec.data.TSN_seq,
4886                             cumulative_tsn_p1, MAX_TSN)) {
4887                                 /* Yep it is above cum-ack */
4888                                 cnt++;
4889                                 tsn = chk->rec.data.TSN_seq;
4890                                 if (tsn >= asoc->mapping_array_base_tsn) {
4891                                         gap = tsn -
4892                                             asoc->mapping_array_base_tsn;
4893                                 } else {
4894                                         gap = (MAX_TSN -
4895                                             asoc->mapping_array_base_tsn) +
4896                                             tsn + 1;
4897                                 }
4898                                 asoc->size_on_all_streams -= chk->send_size;
4899                                 asoc->cnt_on_all_streams--;
4900
4901                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
4902                                     gap);
4903                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
4904                                     chk, sctp_next);
4905                                 if (chk->data) {
4906                                         sctp_m_freem(chk->data);
4907                                         chk->data = NULL;
4908                                 }
4909                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4910                                 sctppcbinfo.ipi_count_chunk--;
4911                                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4912                                         panic("Chunk count is negative");
4913                                 }
4914                                 sctppcbinfo.ipi_gencnt_chunk++;
4915                         }
4916                         chk = nchk;
4917                 }
4918         }
4919         /*
4920          * Question, should we go through the delivery queue?
4921          * The only reason things are on here is the app not reading OR a
4922          * p-d-api up. An attacker COULD send enough in to initiate the
4923          * PD-API and then send a bunch of stuff to other streams... these
4924          * would wind up on the delivery queue.. and then we would not get
4925          * to them. But in order to do this I then have to back-track and
4926          * un-deliver sequence numbers in streams.. el-yucko. I think for
4927          * now we will NOT look at the delivery queue and leave it to be
4928          * something to consider later. An alternative would be to abort
4929          * the P-D-API with a notification and then deliver the data....
4930          * Or another method might be to keep track of how many times the
4931          * situation occurs and if we see a possible attack underway just
4932          * abort the association.
4933          */
4934 #ifdef SCTP_DEBUG
4935         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
4936                 if (cnt) {
4937                         kprintf("Freed %d chunks from reneg harvest\n", cnt);
4938                 }
4939         }
4940 #endif /* SCTP_DEBUG */
4941
4942         /*
4943          * Another issue, in un-setting the TSN's in the mapping array we
4944          * DID NOT adjust the higest_tsn marker.  This will cause one of
4945          * two things to occur. It may cause us to do extra work in checking
4946          * for our mapping array movement. More importantly it may cause us
4947          * to SACK every datagram. This may not be a bad thing though since
4948          * we will recover once we get our cum-ack above and all this stuff
4949          * we dumped recovered.
4950          */
4951 }
4952
4953 void
4954 sctp_drain(void)
4955 {
4956         /*
4957          * We must walk the PCB lists for ALL associations here. The system
4958          * is LOW on MBUF's and needs help. This is where reneging will
4959          * occur. We really hope this does NOT happen!
4960          */
4961         struct sctp_inpcb *inp;
4962         struct sctp_tcb *stcb;
4963
4964         SCTP_INP_INFO_RLOCK();
4965         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
4966                 /* For each endpoint */
4967                 SCTP_INP_RLOCK(inp);
4968                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4969                         /* For each association */
4970                         SCTP_TCB_LOCK(stcb);
4971                         sctp_drain_mbufs(inp, stcb);
4972                         SCTP_TCB_UNLOCK(stcb);
4973                 }
4974                 SCTP_INP_RUNLOCK(inp);
4975         }
4976         SCTP_INP_INFO_RUNLOCK();
4977 }
4978
4979 int
4980 sctp_add_to_socket_q(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4981 {
4982         struct sctp_socket_q_list *sq;
4983
4984         /* write lock on INP assumed */
4985         if ((inp == NULL) || (stcb == NULL)) {
4986                 /* I am paranoid */
4987                 return (0);
4988         }
4989         sq = (struct sctp_socket_q_list *)SCTP_ZONE_GET(
4990             sctppcbinfo.ipi_zone_sockq);
4991         if (sq == NULL) {
4992                 /* out of sq structs */
4993                 return (0);
4994         }
4995         sctppcbinfo.ipi_count_sockq++;
4996         sctppcbinfo.ipi_gencnt_sockq++;
4997         if (stcb)
4998                 stcb->asoc.cnt_msg_on_sb++;
4999         sq->tcb = stcb;
5000         TAILQ_INSERT_TAIL(&inp->sctp_queue_list, sq, next_sq);
5001         return (1);
5002 }
5003
5004
5005 struct sctp_tcb *
5006 sctp_remove_from_socket_q(struct sctp_inpcb *inp)
5007 {
5008         struct sctp_tcb *stcb = NULL;
5009         struct sctp_socket_q_list *sq;
5010
5011         /* W-Lock on INP assumed held */
5012         sq = TAILQ_FIRST(&inp->sctp_queue_list);
5013         if (sq == NULL)
5014                 return (NULL);
5015
5016         stcb = sq->tcb;
5017         TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
5018         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
5019         sctppcbinfo.ipi_count_sockq--;
5020         sctppcbinfo.ipi_gencnt_sockq++;
5021         if (stcb) {
5022                 stcb->asoc.cnt_msg_on_sb--;
5023         }
5024         return (stcb);
5025 }
5026
5027 int
5028 sctp_initiate_iterator(asoc_func af, uint32_t pcb_state, uint32_t asoc_state,
5029                        void *argp, uint32_t argi, end_func ef,
5030                        struct sctp_inpcb *s_inp)
5031 {
5032         struct sctp_iterator *it=NULL;
5033
5034         if (af == NULL) {
5035                 return (-1);
5036         }
5037         MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), M_PCB,
5038                M_WAITOK);
5039         memset(it, 0, sizeof(*it));
5040         it->function_toapply = af;
5041         it->function_atend = ef;
5042         it->pointer = argp;
5043         it->val = argi;
5044         it->pcb_flags = pcb_state;
5045         it->asoc_state = asoc_state;
5046         if (s_inp) {
5047                 it->inp = s_inp;
5048                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5049         } else {
5050                 SCTP_INP_INFO_RLOCK();
5051                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5052                 SCTP_INP_INFO_RUNLOCK();
5053                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5054
5055         }
5056         /* Init the timer */
5057 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
5058         callout_init(&it->tmr.timer, 0);
5059 #else
5060         callout_init(&it->tmr.timer);
5061 #endif
5062         /* add to the list of all iterators */
5063         SCTP_INP_INFO_WLOCK();
5064         LIST_INSERT_HEAD(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5065         SCTP_INP_INFO_WUNLOCK();
5066         crit_enter();
5067         sctp_iterator_timer(it);
5068         crit_exit();
5069         return (0);
5070 }
5071
5072
5073 /*
5074  * Callout/Timer routines for OS that doesn't have them
5075  */
5076 #ifdef _SCTP_NEEDS_CALLOUT_
5077 #ifndef __APPLE__
5078 extern int ticks;
5079 #endif
5080
5081 void
5082 callout_init(struct callout *c)
5083 {
5084         bzero(c, sizeof(*c));
5085 }
5086
5087 void
5088 callout_reset(struct callout *c, int to_ticks, void (*ftn)(void *), void *arg)
5089 {
5090         crit_enter();
5091         if (c->c_flags & CALLOUT_PENDING)
5092                 callout_stop(c);
5093
5094         /*
5095          * We could spl down here and back up at the TAILQ_INSERT_TAIL,
5096          * but there's no point since doing this setup doesn't take much
5097          * time.
5098          */
5099         if (to_ticks <= 0)
5100                 to_ticks = 1;
5101
5102         c->c_arg = arg;
5103         c->c_flags = (CALLOUT_ACTIVE | CALLOUT_PENDING);
5104         c->c_func = ftn;
5105 #ifdef __APPLE__
5106         c->c_time = to_ticks;   /* just store the requested timeout */
5107         timeout(ftn, arg, to_ticks);
5108 #else
5109         c->c_time = ticks + to_ticks;
5110         TAILQ_INSERT_TAIL(&sctppcbinfo.callqueue, c, tqe);
5111 #endif
5112         crit_exit();
5113 }
5114
5115 int
5116 callout_stop(struct callout *c)
5117 {
5118         crit_enter();
5119         /*
5120          * Don't attempt to delete a callout that's not on the queue.
5121          */
5122         if (!(c->c_flags & CALLOUT_PENDING)) {
5123                 c->c_flags &= ~CALLOUT_ACTIVE;
5124                 crit_exit();
5125                 return (0);
5126         }
5127         c->c_flags &= ~(CALLOUT_ACTIVE | CALLOUT_PENDING| CALLOUT_FIRED);
5128 #ifdef __APPLE__
5129 /*      thread_call_cancel(c->c_call); */
5130         untimeout(c->c_func, c->c_arg);
5131 #else
5132         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5133         c->c_func = NULL;
5134 #endif
5135         crit_exit();
5136         return (1);
5137 }
5138
5139 #if !defined(__APPLE__)
5140 void
5141 sctp_fasttim(void)
5142 {
5143         struct callout *c, *n;
5144         struct calloutlist locallist;
5145         int inited = 0;
5146
5147         crit_enter();
5148         /* run through and subtract and mark all callouts */
5149         c = TAILQ_FIRST(&sctppcbinfo.callqueue);
5150         while (c) {
5151                 n = TAILQ_NEXT(c, tqe);
5152                 if (c->c_time <= ticks) {
5153                         c->c_flags |= CALLOUT_FIRED;
5154                         c->c_time = 0;
5155                         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5156                         if (inited == 0) {
5157                                 TAILQ_INIT(&locallist);
5158                                 inited = 1;
5159                         }
5160                         /* move off of main list */
5161                         TAILQ_INSERT_TAIL(&locallist, c, tqe);
5162                 }
5163                 c = n;
5164         }
5165         /* Now all the ones on the locallist must be called */
5166         if (inited) {
5167                 c = TAILQ_FIRST(&locallist);
5168                 while (c) {
5169                         /* remove it */
5170                         TAILQ_REMOVE(&locallist, c, tqe);
5171                         /* now validate that it did not get canceled */
5172                         if (c->c_flags & CALLOUT_FIRED) {
5173                                 c->c_flags &= ~CALLOUT_PENDING;
5174                                 crit_exit();
5175                                 (*c->c_func)(c->c_arg);
5176                                 crit_enter();
5177                         }
5178                         c = TAILQ_FIRST(&locallist);
5179                 }
5180         }
5181         crit_exit();
5182 }
5183 #endif
5184 #endif /* _SCTP_NEEDS_CALLOUT_ */