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         SCTP_ASOC_CREATE_LOCK(inp);
2241         SCTP_INP_WLOCK(inp);
2242
2243         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2244                 /* been here before */
2245                 kprintf("Endpoint was all gone (dup free)?\n");
2246                 SCTP_INP_WUNLOCK(inp);
2247                 SCTP_ASOC_CREATE_UNLOCK(inp);
2248                 return;
2249         }
2250         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2251
2252         if (inp->control) {
2253                 sctp_m_freem(inp->control);
2254                 inp->control = NULL;
2255         }
2256         if (inp->pkt) {
2257                 sctp_m_freem(inp->pkt);
2258                 inp->pkt = NULL;
2259         }
2260         so  = inp->sctp_socket;
2261         m = &inp->sctp_ep;
2262         ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2263                                    * pointer here but I will
2264                                    * be nice :> (i.e. ip_pcb = ep;)
2265                                    */
2266
2267         if (immediate == 0) {
2268                 int cnt_in_sd;
2269                 cnt_in_sd = 0;
2270                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2271                      asoc = nasoc) {
2272                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2273                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2274                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2275                                 /* Just abandon things in the front states */
2276                                 SCTP_TCB_LOCK(asoc);
2277                                 SCTP_INP_WUNLOCK(inp);
2278                                 sctp_free_assoc(inp, asoc);
2279                                 SCTP_INP_WLOCK(inp);
2280                                 continue;
2281                         } else {
2282                                 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2283                         }
2284                         if ((asoc->asoc.size_on_delivery_queue  > 0) ||
2285                             (asoc->asoc.size_on_reasm_queue > 0) ||
2286                             (asoc->asoc.size_on_all_streams > 0) ||
2287                             (so && (so->so_rcv.ssb_cc > 0))
2288                                 ) {
2289                                 /* Left with Data unread */
2290                                 struct mbuf *op_err;
2291                                 MGET(op_err, MB_DONTWAIT, MT_DATA);
2292                                 if (op_err) {
2293                                         /* Fill in the user initiated abort */
2294                                         struct sctp_paramhdr *ph;
2295                                         op_err->m_len =
2296                                             sizeof(struct sctp_paramhdr);
2297                                         ph = mtod(op_err,
2298                                             struct sctp_paramhdr *);
2299                                         ph->param_type = htons(
2300                                             SCTP_CAUSE_USER_INITIATED_ABT);
2301                                         ph->param_length = htons(op_err->m_len);
2302                                 }
2303                                 SCTP_TCB_LOCK(asoc);
2304                                 sctp_send_abort_tcb(asoc, op_err);
2305
2306                                 SCTP_INP_WUNLOCK(inp);
2307                                 sctp_free_assoc(inp, asoc);
2308                                 SCTP_INP_WLOCK(inp);
2309                                 continue;
2310                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2311                             TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2312                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2313                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2314                                         /* there is nothing queued to send, so I send shutdown */
2315                                         SCTP_TCB_LOCK(asoc);
2316                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2317                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2318                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2319                                                          asoc->asoc.primary_destination);
2320                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2321                                                          asoc->asoc.primary_destination);
2322                                         sctp_chunk_output(inp, asoc, 1);
2323                                         SCTP_TCB_UNLOCK(asoc);
2324                                 }
2325                         } else {
2326                                 /* mark into shutdown pending */
2327                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2328                         }
2329                         cnt_in_sd++;
2330                 }
2331                 /* now is there some left in our SHUTDOWN state? */
2332                 if (cnt_in_sd) {
2333                         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2334                         SCTP_INP_WUNLOCK(inp);
2335                         SCTP_ASOC_CREATE_UNLOCK(inp);
2336                         return;
2337                 }
2338         }
2339 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2340         if (inp->refcount) {
2341                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2342                 SCTP_INP_WUNLOCK(inp);
2343                 SCTP_ASOC_CREATE_UNLOCK(inp);
2344                 return;
2345         }
2346 #endif
2347         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2348 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2349         rt = ip_pcb->inp_route.ro_rt;
2350 #endif
2351
2352         callout_stop(&inp->sctp_ep.signature_change.timer);
2353
2354         if (so) {
2355         /* First take care of socket level things */
2356 #ifdef IPSEC
2357 #ifdef __OpenBSD__
2358         /* XXX IPsec cleanup here */
2359                 if (ip_pcb->inp_tdb_in)
2360                     TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2361                                  ip_pcb, inp_tdb_in_next);
2362                 if (ip_pcb->inp_tdb_out)
2363                     TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2364                                  inp_tdb_out_next);
2365                 if (ip_pcb->inp_ipsec_localid)
2366                     ipsp_reffree(ip_pcb->inp_ipsec_localid);
2367                 if (ip_pcb->inp_ipsec_remoteid)
2368                     ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2369                 if (ip_pcb->inp_ipsec_localcred)
2370                     ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2371                 if (ip_pcb->inp_ipsec_remotecred)
2372                     ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2373                 if (ip_pcb->inp_ipsec_localauth)
2374                     ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2375                 if (ip_pcb->inp_ipsec_remoteauth)
2376                     ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2377 #else
2378                 ipsec4_delete_pcbpolicy(ip_pcb);
2379 #endif
2380 #endif /*IPSEC*/
2381 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2382                 ACCEPT_LOCK();
2383                 SOCK_LOCK(so);
2384 #endif
2385                 so->so_pcb = NULL;
2386                 sofree(so);
2387         }
2388
2389         if (ip_pcb->inp_options) {
2390                 m_free(ip_pcb->inp_options);
2391                 ip_pcb->inp_options = 0;
2392         }
2393 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2394         if (rt) {
2395                 RTFREE(rt);
2396                 ip_pcb->inp_route.ro_rt = 0;
2397         }
2398 #endif
2399         if (ip_pcb->inp_moptions) {
2400                 ip_freemoptions(ip_pcb->inp_moptions);
2401                 ip_pcb->inp_moptions = 0;
2402         }
2403 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2404         inp->inp_vflag = 0;
2405 #else
2406         ip_pcb->inp_vflag = 0;
2407 #endif
2408
2409         /* Now the sctp_pcb things */
2410
2411         /*
2412          * free each asoc if it is not already closed/free. we can't use
2413          * the macro here since le_next will get freed as part of the
2414          * sctp_free_assoc() call.
2415          */
2416         cnt = 0;
2417         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2418              asoc = nasoc) {
2419                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2420                 SCTP_TCB_LOCK(asoc);
2421                 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2422                         struct mbuf *op_err;
2423                         MGET(op_err, MB_DONTWAIT, MT_DATA);
2424                         if (op_err) {
2425                                 /* Fill in the user initiated abort */
2426                                 struct sctp_paramhdr *ph;
2427                                 op_err->m_len = sizeof(struct sctp_paramhdr);
2428                                 ph = mtod(op_err, struct sctp_paramhdr *);
2429                                 ph->param_type = htons(
2430                                     SCTP_CAUSE_USER_INITIATED_ABT);
2431                                 ph->param_length = htons(op_err->m_len);
2432                         }
2433                         sctp_send_abort_tcb(asoc, op_err);
2434                 }
2435                 cnt++;
2436                 /*
2437                  * sctp_free_assoc() will call sctp_inpcb_free(),
2438                  * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2439                  * So, we clear it before sctp_free_assoc() making sure
2440                  * no double sctp_inpcb_free().
2441                  */
2442                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2443                 SCTP_INP_WUNLOCK(inp);
2444                 sctp_free_assoc(inp, asoc);
2445                 SCTP_INP_WLOCK(inp);
2446         }
2447         while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2448                 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2449                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2450                 sctppcbinfo.ipi_count_sockq--;
2451                 sctppcbinfo.ipi_gencnt_sockq++;
2452         }
2453         inp->sctp_socket = 0;
2454         /* Now first we remove ourselves from the overall list of all EP's */
2455
2456         /* Unlock inp first, need correct order */
2457         SCTP_INP_WUNLOCK(inp);
2458         /* now iterator lock */
2459         SCTP_ITERATOR_LOCK();
2460         /* now info lock */
2461         SCTP_INP_INFO_WLOCK();
2462         /* now reget the inp lock */
2463         SCTP_INP_WLOCK(inp);
2464
2465         inp_save = LIST_NEXT(inp, sctp_list);
2466         LIST_REMOVE(inp, sctp_list);
2467         /*
2468          * Now the question comes as to if this EP was ever bound at all.
2469          * If it was, then we must pull it out of the EP hash list.
2470          */
2471         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2472             SCTP_PCB_FLAGS_UNBOUND) {
2473                 /*
2474                  * ok, this guy has been bound. It's port is somewhere
2475                  * in the sctppcbinfo hash table. Remove it!
2476                  */
2477                 LIST_REMOVE(inp, sctp_hash);
2478         }
2479         /* fix any iterators only after out of the list */
2480         sctp_iterator_inp_being_freed(inp, inp_save);
2481         SCTP_ITERATOR_UNLOCK();
2482         /*
2483          * if we have an address list the following will free the list of
2484          * ifaddr's that are set into this ep. Again macro limitations here,
2485          * since the LIST_FOREACH could be a bad idea.
2486          */
2487         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2488              laddr = nladdr) {
2489                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2490                 LIST_REMOVE(laddr, sctp_nxt_addr);
2491                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2492                 sctppcbinfo.ipi_gencnt_laddr++;
2493                 sctppcbinfo.ipi_count_laddr--;
2494         }
2495         /* Now lets see about freeing the EP hash table. */
2496         if (inp->sctp_tcbhash != NULL) {
2497                 FREE(inp->sctp_tcbhash, M_PCB);
2498                 inp->sctp_tcbhash = 0;
2499         }
2500         SCTP_INP_WUNLOCK(inp);
2501         SCTP_ASOC_CREATE_UNLOCK(inp);
2502         SCTP_INP_LOCK_DESTROY(inp);
2503         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2504
2505         /* Now we must put the ep memory back into the zone pool */
2506         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2507         sctppcbinfo.ipi_count_ep--;
2508
2509         SCTP_INP_INFO_WUNLOCK();
2510 }
2511
2512
2513 struct sctp_nets *
2514 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2515 {
2516         struct sctp_nets *net;
2517         struct sockaddr_in *sin;
2518         struct sockaddr_in6 *sin6;
2519         /* use the peer's/remote port for lookup if unspecified */
2520         sin = (struct sockaddr_in *)addr;
2521         sin6 = (struct sockaddr_in6 *)addr;
2522 #if 0 /* why do we need to check the port for a nets list on an assoc? */
2523         if (stcb->rport != sin->sin_port) {
2524                 /* we cheat and just a sin for this test */
2525                 return (NULL);
2526         }
2527 #endif
2528         /* locate the address */
2529         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2530                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2531                         return (net);
2532         }
2533         return (NULL);
2534 }
2535
2536
2537 /*
2538  * add's a remote endpoint address, done with the INIT/INIT-ACK
2539  * as well as when a ASCONF arrives that adds it. It will also
2540  * initialize all the cwnd stats of stuff.
2541  */
2542 int
2543 sctp_is_address_on_local_host(struct sockaddr *addr)
2544 {
2545         struct ifnet *ifn;
2546
2547         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2548                 struct ifaddr_container *ifac;
2549
2550                 TAILQ_FOREACH(ifac, &ifn->if_addrheads[mycpuid], ifa_link) {
2551                         struct ifaddr *ifa = ifac->ifa;
2552
2553                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2554                                 /* same family */
2555                                 if (addr->sa_family == AF_INET) {
2556                                         struct sockaddr_in *sin, *sin_c;
2557                                         sin = (struct sockaddr_in *)addr;
2558                                         sin_c = (struct sockaddr_in *)
2559                                             ifa->ifa_addr;
2560                                         if (sin->sin_addr.s_addr ==
2561                                             sin_c->sin_addr.s_addr) {
2562                                                 /* we are on the same machine */
2563                                                 return (1);
2564                                         }
2565                                 } else if (addr->sa_family == AF_INET6) {
2566                                         struct sockaddr_in6 *sin6, *sin_c6;
2567                                         sin6 = (struct sockaddr_in6 *)addr;
2568                                         sin_c6 = (struct sockaddr_in6 *)
2569                                             ifa->ifa_addr;
2570                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2571                                             &sin_c6->sin6_addr)) {
2572                                                 /* we are on the same machine */
2573                                                 return (1);
2574                                         }
2575                                 }
2576                         }
2577                 }
2578         }
2579         return (0);
2580 }
2581
2582 int
2583 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2584     int set_scope, int from)
2585 {
2586         /*
2587          * The following is redundant to the same lines in the
2588          * sctp_aloc_assoc() but is needed since other's call the add
2589          * address function
2590          */
2591         struct sctp_nets *net, *netfirst;
2592         int addr_inscope;
2593
2594 #ifdef SCTP_DEBUG
2595         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2596                 kprintf("Adding an address (from:%d) to the peer: ", from);
2597                 sctp_print_address(newaddr);
2598         }
2599 #endif
2600         netfirst = sctp_findnet(stcb, newaddr);
2601         if (netfirst) {
2602                 /*
2603                  * Lie and return ok, we don't want to make the association
2604                  * go away for this behavior. It will happen in the TCP model
2605                  * in a connected socket. It does not reach the hash table
2606                  * until after the association is built so it can't be found.
2607                  * Mark as reachable, since the initial creation will have
2608                  * been cleared and the NOT_IN_ASSOC flag will have been
2609                  * added... and we don't want to end up removing it back out.
2610                  */
2611                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2612                         netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2613                             SCTP_ADDR_UNCONFIRMED);
2614                 } else {
2615                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2616                 }
2617
2618                 return (0);
2619         }
2620         addr_inscope = 1;
2621         if (newaddr->sa_family == AF_INET) {
2622                 struct sockaddr_in *sin;
2623                 sin = (struct sockaddr_in *)newaddr;
2624                 if (sin->sin_addr.s_addr == 0) {
2625                         /* Invalid address */
2626                         return (-1);
2627                 }
2628                 /* zero out the bzero area */
2629                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2630
2631                 /* assure len is set */
2632                 sin->sin_len = sizeof(struct sockaddr_in);
2633                 if (set_scope) {
2634 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2635                         stcb->ipv4_local_scope = 1;
2636 #else
2637                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2638                                 stcb->asoc.ipv4_local_scope = 1;
2639                         }
2640 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2641
2642                         if (sctp_is_address_on_local_host(newaddr)) {
2643                                 stcb->asoc.loopback_scope = 1;
2644                                 stcb->asoc.ipv4_local_scope = 1;
2645                                 stcb->asoc.local_scope = 1;
2646                                 stcb->asoc.site_scope = 1;
2647                         }
2648                 } else {
2649                         if (from == 8) {
2650                                 /* From connectx */
2651                                 if (sctp_is_address_on_local_host(newaddr)) {
2652                                         stcb->asoc.loopback_scope = 1;
2653                                         stcb->asoc.ipv4_local_scope = 1;
2654                                         stcb->asoc.local_scope = 1;
2655                                         stcb->asoc.site_scope = 1;
2656                                 }
2657                         }
2658                         /* Validate the address is in scope */
2659                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2660                             (stcb->asoc.ipv4_local_scope == 0)) {
2661                                 addr_inscope = 0;
2662                         }
2663                 }
2664         } else if (newaddr->sa_family == AF_INET6) {
2665                 struct sockaddr_in6 *sin6;
2666                 sin6 = (struct sockaddr_in6 *)newaddr;
2667                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2668                         /* Invalid address */
2669                         return (-1);
2670                 }
2671                 /* assure len is set */
2672                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2673                 if (set_scope) {
2674                         if (sctp_is_address_on_local_host(newaddr)) {
2675                                 stcb->asoc.loopback_scope = 1;
2676                                 stcb->asoc.local_scope = 1;
2677                                 stcb->asoc.ipv4_local_scope = 1;
2678                                 stcb->asoc.site_scope = 1;
2679                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2680                                 /*
2681                                  * If the new destination is a LINK_LOCAL
2682                                  * we must have common site scope. Don't set
2683                                  * the local scope since we may not share all
2684                                  * links, only loopback can do this.
2685                                  * Links on the local network would also
2686                                  * be on our private network for v4 too.
2687                                  */
2688                                 stcb->asoc.ipv4_local_scope = 1;
2689                                 stcb->asoc.site_scope = 1;
2690                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2691                                 /*
2692                                  * If the new destination is SITE_LOCAL
2693                                  * then we must have site scope in common.
2694                                  */
2695                                 stcb->asoc.site_scope = 1;
2696                         }
2697                 } else {
2698                         if (from == 8) {
2699                                 /* From connectx */
2700                                 if (sctp_is_address_on_local_host(newaddr)) {
2701                                         stcb->asoc.loopback_scope = 1;
2702                                         stcb->asoc.ipv4_local_scope = 1;
2703                                         stcb->asoc.local_scope = 1;
2704                                         stcb->asoc.site_scope = 1;
2705                                 }
2706                         }
2707                         /* Validate the address is in scope */
2708                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2709                             (stcb->asoc.loopback_scope == 0)) {
2710                                 addr_inscope = 0;
2711                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2712                                    (stcb->asoc.local_scope == 0)) {
2713                                 addr_inscope = 0;
2714                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2715                                    (stcb->asoc.site_scope == 0)) {
2716                                 addr_inscope = 0;
2717                         }
2718                 }
2719         } else {
2720                 /* not supported family type */
2721                 return (-1);
2722         }
2723         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2724         if (net == NULL) {
2725                 return (-1);
2726         }
2727         sctppcbinfo.ipi_count_raddr++;
2728         sctppcbinfo.ipi_gencnt_raddr++;
2729         bzero(net, sizeof(*net));
2730         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2731         if (newaddr->sa_family == AF_INET) {
2732                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2733         } else if (newaddr->sa_family == AF_INET6) {
2734                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2735         }
2736         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2737         net->failure_threshold = stcb->asoc.def_net_failure;
2738         if (addr_inscope == 0) {
2739 #ifdef SCTP_DEBUG
2740                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2741                         kprintf("Adding an address which is OUT OF SCOPE\n");
2742                 }
2743 #endif /* SCTP_DEBUG */
2744                 net->dest_state = (SCTP_ADDR_REACHABLE |
2745                     SCTP_ADDR_OUT_OF_SCOPE);
2746         } else {
2747                 if (from == 8)
2748                         /* 8 is passed by connect_x */
2749                         net->dest_state = SCTP_ADDR_REACHABLE;
2750                 else
2751                         net->dest_state = SCTP_ADDR_REACHABLE |
2752                             SCTP_ADDR_UNCONFIRMED;
2753         }
2754         net->RTO = stcb->asoc.initial_rto;
2755         stcb->asoc.numnets++;
2756         net->ref_count = 1;
2757
2758         /* Init the timer structure */
2759 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2760         callout_init(&net->rxt_timer.timer, 0);
2761         callout_init(&net->pmtu_timer.timer, 0);
2762 #else
2763         callout_init(&net->rxt_timer.timer);
2764         callout_init(&net->pmtu_timer.timer);
2765 #endif
2766
2767         /* Now generate a route for this guy */
2768         /* KAME hack: embed scopeid */
2769         if (newaddr->sa_family == AF_INET6) {
2770                 struct sockaddr_in6 *sin6;
2771                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2772 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2773                 in6_embedscope(&sin6->sin6_addr, sin6,
2774                     &stcb->sctp_ep->ip_inp.inp, NULL);
2775 #else
2776                 in6_embedscope(&sin6->sin6_addr, sin6);
2777 #endif
2778 #ifndef SCOPEDROUTING
2779                 sin6->sin6_scope_id = 0;
2780 #endif
2781         }
2782 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2783         rtalloc_ign((struct route *)&net->ro, 0UL);
2784 #else
2785         rtalloc((struct route *)&net->ro);
2786 #endif
2787         if (newaddr->sa_family == AF_INET6) {
2788                 struct sockaddr_in6 *sin6;
2789                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2790                 in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2791         }
2792         if ((net->ro.ro_rt) &&
2793             (net->ro.ro_rt->rt_ifp)) {
2794                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2795                 if (from == 1) {
2796                         stcb->asoc.smallest_mtu = net->mtu;
2797                 }
2798                 /* start things off to match mtu of interface please. */
2799                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2800         } else {
2801                 net->mtu = stcb->asoc.smallest_mtu;
2802         }
2803         if (stcb->asoc.smallest_mtu > net->mtu) {
2804                 stcb->asoc.smallest_mtu = net->mtu;
2805         }
2806         /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2807          * We then limit this to 4 MTU's of sending.
2808          */
2809         net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2810
2811         /* we always get at LEAST 2 MTU's */
2812         if (net->cwnd < (2 * net->mtu)) {
2813                 net->cwnd = 2 * net->mtu;
2814         }
2815
2816         net->ssthresh = stcb->asoc.peers_rwnd;
2817
2818         net->src_addr_selected = 0;
2819         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2820         if (net->ro.ro_rt == NULL) {
2821                 /* Since we have no route put it at the back */
2822                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2823         } else if (netfirst == NULL) {
2824                 /* We are the first one in the pool. */
2825                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2826         } else if (netfirst->ro.ro_rt == NULL) {
2827                 /*
2828                  * First one has NO route. Place this one ahead of the
2829                  * first one.
2830                  */
2831                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2832         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2833                 /*
2834                  * This one has a different interface than the one at the
2835                  * top of the list. Place it ahead.
2836                  */
2837                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2838         } else {
2839                 /*
2840                  * Ok we have the same interface as the first one. Move
2841                  * forward until we find either
2842                  *   a) one with a NULL route... insert ahead of that
2843                  *   b) one with a different ifp.. insert after that.
2844                  *   c) end of the list.. insert at the tail.
2845                  */
2846                 struct sctp_nets *netlook;
2847                 do {
2848                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2849                         if (netlook == NULL) {
2850                                 /* End of the list */
2851                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2852                                     sctp_next);
2853                                 break;
2854                         } else if (netlook->ro.ro_rt == NULL) {
2855                                 /* next one has NO route */
2856                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2857                                 break;
2858                         } else if (netlook->ro.ro_rt->rt_ifp !=
2859                                    net->ro.ro_rt->rt_ifp) {
2860                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2861                                     net, sctp_next);
2862                                 break;
2863                         }
2864                         /* Shift forward */
2865                         netfirst = netlook;
2866                 } while (netlook != NULL);
2867         }
2868         /* got to have a primary set */
2869         if (stcb->asoc.primary_destination == 0) {
2870                 stcb->asoc.primary_destination = net;
2871         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2872                    (net->ro.ro_rt)) {
2873                 /* No route to current primary adopt new primary */
2874                 stcb->asoc.primary_destination = net;
2875         }
2876         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2877             net);
2878
2879         return (0);
2880 }
2881
2882
2883 /*
2884  * allocate an association and add it to the endpoint. The caller must
2885  * be careful to add all additional addresses once they are know right
2886  * away or else the assoc will be may experience a blackout scenario.
2887  */
2888 struct sctp_tcb *
2889 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2890     int for_a_init, int *error,  uint32_t override_tag)
2891 {
2892         struct sctp_tcb *stcb;
2893         struct sctp_association *asoc;
2894         struct sctpasochead *head;
2895         uint16_t rport;
2896         int err;
2897
2898         /*
2899          * Assumption made here:
2900          *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2901          *  to make sure the address does not exist already.
2902          */
2903         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2904                 /* Hit max assoc, sorry no more */
2905                 *error = ENOBUFS;
2906                 return (NULL);
2907         }
2908         SCTP_INP_RLOCK(inp);
2909         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2910                 /*
2911                  * If its in the TCP pool, its NOT allowed to create an
2912                  * association. The parent listener needs to call
2913                  * sctp_aloc_assoc.. or the one-2-many socket. If a
2914                  * peeled off, or connected one does this.. its an error.
2915                  */
2916                 SCTP_INP_RUNLOCK(inp);
2917                 *error = EINVAL;
2918                 return (NULL);
2919         }
2920
2921 #ifdef SCTP_DEBUG
2922         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2923                 kprintf("Allocate an association for peer:");
2924                 if (firstaddr)
2925                         sctp_print_address(firstaddr);
2926                 else
2927                         kprintf("None\n");
2928                 kprintf("Port:%d\n",
2929                        ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2930         }
2931 #endif /* SCTP_DEBUG */
2932         if (firstaddr->sa_family == AF_INET) {
2933                 struct sockaddr_in *sin;
2934                 sin = (struct sockaddr_in *)firstaddr;
2935                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2936                         /* Invalid address */
2937 #ifdef SCTP_DEBUG
2938                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2939                                 kprintf("peer address invalid\n");
2940                         }
2941 #endif
2942                         SCTP_INP_RUNLOCK(inp);
2943                         *error = EINVAL;
2944                         return (NULL);
2945                 }
2946                 rport = sin->sin_port;
2947         } else if (firstaddr->sa_family == AF_INET6) {
2948                 struct sockaddr_in6 *sin6;
2949                 sin6 = (struct sockaddr_in6 *)firstaddr;
2950                 if ((sin6->sin6_port == 0) ||
2951                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2952                         /* Invalid address */
2953 #ifdef SCTP_DEBUG
2954                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2955                                 kprintf("peer address invalid\n");
2956                         }
2957 #endif
2958                         SCTP_INP_RUNLOCK(inp);
2959                         *error = EINVAL;
2960                         return (NULL);
2961                 }
2962                 rport = sin6->sin6_port;
2963         } else {
2964                 /* not supported family type */
2965 #ifdef SCTP_DEBUG
2966                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2967                         kprintf("BAD family %d\n", firstaddr->sa_family);
2968                 }
2969 #endif
2970                 SCTP_INP_RUNLOCK(inp);
2971                 *error = EINVAL;
2972                 return (NULL);
2973         }
2974         SCTP_INP_RUNLOCK(inp);
2975         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2976                 /*
2977                  * If you have not performed a bind, then we need to do
2978                  * the ephemerial bind for you.
2979                  */
2980 #ifdef SCTP_DEBUG
2981                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2982                         kprintf("Doing implicit BIND\n");
2983                 }
2984 #endif
2985
2986                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2987                     NULL,
2988 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2989                                            NULL
2990 #else
2991                                            NULL
2992 #endif
2993                              ))){
2994                         /* bind error, probably perm */
2995 #ifdef SCTP_DEBUG
2996                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2997                                 kprintf("BIND FAILS ret:%d\n", err);
2998                         }
2999 #endif
3000
3001                         *error = err;
3002                         return (NULL);
3003                 }
3004         }
3005         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3006         if (stcb == NULL) {
3007                 /* out of memory? */
3008 #ifdef SCTP_DEBUG
3009                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3010                         kprintf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3011                 }
3012 #endif
3013                 *error = ENOMEM;
3014                 return (NULL);
3015         }
3016         sctppcbinfo.ipi_count_asoc++;
3017         sctppcbinfo.ipi_gencnt_asoc++;
3018
3019         bzero(stcb, sizeof(*stcb));
3020         asoc = &stcb->asoc;
3021         SCTP_TCB_LOCK_INIT(stcb);
3022         /* setup back pointer's */
3023         stcb->sctp_ep = inp;
3024         stcb->sctp_socket = inp->sctp_socket;
3025         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3026                 /* failed */
3027                 SCTP_TCB_LOCK_DESTROY (stcb);
3028                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3029                 sctppcbinfo.ipi_count_asoc--;
3030 #ifdef SCTP_DEBUG
3031                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3032                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3033                 }
3034 #endif
3035                 *error = err;
3036                 return (NULL);
3037         }
3038         /* and the port */
3039         stcb->rport = rport;
3040         SCTP_INP_INFO_WLOCK();
3041         SCTP_INP_WLOCK(inp);
3042         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3043                 /* inpcb freed while alloc going on */
3044                 SCTP_TCB_LOCK_DESTROY (stcb);
3045                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3046                 SCTP_INP_WUNLOCK(inp);
3047                 SCTP_INP_INFO_WUNLOCK();
3048                 sctppcbinfo.ipi_count_asoc--;
3049 #ifdef SCTP_DEBUG
3050                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3051                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3052                 }
3053 #endif
3054                 *error = EINVAL;
3055                 return (NULL);
3056         }
3057         SCTP_TCB_LOCK(stcb);
3058
3059         /* now that my_vtag is set, add it to the  hash */
3060         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3061              sctppcbinfo.hashasocmark)];
3062         /* put it in the bucket in the vtag hash of assoc's for the system */
3063         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3064         SCTP_INP_INFO_WUNLOCK();
3065
3066
3067         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3068                 /* failure.. memory error? */
3069                 if (asoc->strmout)
3070                         FREE(asoc->strmout, M_PCB);
3071                 if (asoc->mapping_array)
3072                         FREE(asoc->mapping_array, M_PCB);
3073
3074                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3075                 sctppcbinfo.ipi_count_asoc--;
3076 #ifdef SCTP_DEBUG
3077                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3078                         kprintf("aloc_assoc: couldn't add remote addr!\n");
3079                 }
3080 #endif
3081                 SCTP_TCB_LOCK_DESTROY (stcb);
3082                 *error = ENOBUFS;
3083                 return (NULL);
3084         }
3085         /* Init all the timers */
3086 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3087         callout_init(&asoc->hb_timer.timer, 0);
3088         callout_init(&asoc->dack_timer.timer, 0);
3089         callout_init(&asoc->asconf_timer.timer, 0);
3090         callout_init(&asoc->shut_guard_timer.timer, 0);
3091         callout_init(&asoc->autoclose_timer.timer, 0);
3092         callout_init(&asoc->delayed_event_timer.timer, 0);
3093 #else
3094         callout_init(&asoc->hb_timer.timer);
3095         callout_init(&asoc->dack_timer.timer);
3096         callout_init(&asoc->asconf_timer.timer);
3097         callout_init(&asoc->shut_guard_timer.timer);
3098         callout_init(&asoc->autoclose_timer.timer);
3099         callout_init(&asoc->delayed_event_timer.timer);
3100 #endif
3101         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3102         /* now file the port under the hash as well */
3103         if (inp->sctp_tcbhash != NULL) {
3104                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3105                    inp->sctp_hashmark)];
3106                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3107         }
3108         SCTP_INP_WUNLOCK(inp);
3109 #ifdef SCTP_DEBUG
3110         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3111                 kprintf("Association %p now allocated\n", stcb);
3112         }
3113 #endif
3114         return (stcb);
3115 }
3116
3117 void
3118 sctp_free_remote_addr(struct sctp_nets *net)
3119 {
3120         if (net == NULL)
3121                 return;
3122         net->ref_count--;
3123         if (net->ref_count <= 0) {
3124                 /* stop timer if running */
3125                 callout_stop(&net->rxt_timer.timer);
3126                 callout_stop(&net->pmtu_timer.timer);
3127                 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3128                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3129                 sctppcbinfo.ipi_count_raddr--;
3130         }
3131 }
3132
3133 /*
3134  * remove a remote endpoint address from an association, it
3135  * will fail if the address does not exist.
3136  */
3137 int
3138 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3139 {
3140         /*
3141          * Here we need to remove a remote address. This is quite simple, we
3142          * first find it in the list of address for the association
3143          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3144          * that item.
3145          * Note we do not allow it to be removed if there are no other
3146          * addresses.
3147          */
3148         struct sctp_association *asoc;
3149         struct sctp_nets *net, *net_tmp;
3150         asoc = &stcb->asoc;
3151         if (asoc->numnets < 2) {
3152                 /* Must have at LEAST two remote addresses */
3153                 return (-1);
3154         }
3155         /* locate the address */
3156         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3157                 net_tmp = TAILQ_NEXT(net, sctp_next);
3158                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3159                         continue;
3160                 }
3161                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3162                     remaddr)) {
3163                         /* we found the guy */
3164                         asoc->numnets--;
3165                         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3166                         sctp_free_remote_addr(net);
3167                         if (net == asoc->primary_destination) {
3168                                 /* Reset primary */
3169                                 struct sctp_nets *lnet;
3170                                 lnet = TAILQ_FIRST(&asoc->nets);
3171                                 /* Try to find a confirmed primary */
3172                                 asoc->primary_destination =
3173                                     sctp_find_alternate_net(stcb, lnet);
3174                         }
3175                         if (net == asoc->last_data_chunk_from) {
3176                                 /* Reset primary */
3177                                 asoc->last_data_chunk_from =
3178                                     TAILQ_FIRST(&asoc->nets);
3179                         }
3180                         if (net == asoc->last_control_chunk_from) {
3181                                 /* Reset primary */
3182                                 asoc->last_control_chunk_from =
3183                                     TAILQ_FIRST(&asoc->nets);
3184                         }
3185                         if (net == asoc->asconf_last_sent_to) {
3186                                 /* Reset primary */
3187                                 asoc->asconf_last_sent_to =
3188                                     TAILQ_FIRST(&asoc->nets);
3189                         }
3190                         return (0);
3191                 }
3192         }
3193         /* not found. */
3194         return (-2);
3195 }
3196
3197
3198 static void
3199 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3200 {
3201         struct sctpvtaghead *chain;
3202         struct sctp_tagblock *twait_block;
3203         struct timeval now;
3204         int set, i;
3205         SCTP_GETTIME_TIMEVAL(&now);
3206         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3207         set = 0;
3208         if (!LIST_EMPTY(chain)) {
3209                 /* Block(s) present, lets find space, and expire on the fly */
3210                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3211                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3212                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3213                                     !set) {
3214                                         twait_block->vtag_block[0].tv_sec_at_expire =
3215                                             now.tv_sec + SCTP_TIME_WAIT;
3216                                         twait_block->vtag_block[0].v_tag = tag;
3217                                         set = 1;
3218                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3219                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3220                                     now.tv_sec)) {
3221                                         /* Audit expires this guy */
3222                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3223                                         twait_block->vtag_block[i].v_tag = 0;
3224                                         if (set == 0) {
3225                                                 /* Reuse it for my new tag */
3226                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3227                                                 twait_block->vtag_block[0].v_tag = tag;
3228                                                 set = 1;
3229                                         }
3230                                 }
3231                         }
3232                         if (set) {
3233                                 /*
3234                                  * We only do up to the block where we can
3235                                  * place our tag for audits
3236                                  */
3237                                 break;
3238                         }
3239                 }
3240         }
3241         /* Need to add a new block to chain */
3242         if (!set) {
3243                 MALLOC(twait_block, struct sctp_tagblock *,
3244                        sizeof(struct sctp_tagblock), M_PCB, M_NOWAIT);
3245                 if (twait_block == NULL) {
3246                         return;
3247                 }
3248                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3249                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3250                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3251                     SCTP_TIME_WAIT;
3252                 twait_block->vtag_block[0].v_tag = tag;
3253         }
3254 }
3255
3256
3257 static void
3258 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3259 {
3260         struct sctp_iterator *it;
3261
3262
3263
3264         /* Unlock the tcb lock we do this so
3265          * we avoid a dead lock scenario where
3266          * the iterator is waiting on the TCB lock
3267          * and the TCB lock is waiting on the iterator
3268          * lock.
3269          */
3270         SCTP_ITERATOR_LOCK();
3271         SCTP_INP_INFO_WLOCK();
3272         SCTP_INP_WLOCK(inp);
3273         SCTP_TCB_LOCK(stcb);
3274
3275         it = stcb->asoc.stcb_starting_point_for_iterator;
3276         if (it == NULL) {
3277                 return;
3278         }
3279         if (it->inp != stcb->sctp_ep) {
3280                 /* hm, focused on the wrong one? */
3281                 return;
3282         }
3283         if (it->stcb != stcb) {
3284                 return;
3285         }
3286         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3287         if (it->stcb == NULL) {
3288                 /* done with all asoc's in this assoc */
3289                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3290                         it->inp = NULL;
3291                 } else {
3292
3293                         it->inp = LIST_NEXT(inp, sctp_list);
3294                 }
3295         }
3296 }
3297
3298 /*
3299  * Free the association after un-hashing the remote port.
3300  */
3301 void
3302 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3303 {
3304         struct sctp_association *asoc;
3305         struct sctp_nets *net, *prev;
3306         struct sctp_laddr *laddr;
3307         struct sctp_tmit_chunk *chk;
3308         struct sctp_asconf_addr *aparam;
3309         struct sctp_socket_q_list *sq;
3310
3311         /* first, lets purge the entry from the hash table. */
3312         if (stcb->asoc.state == 0) {
3313                 kprintf("Freeing already free association:%p - huh??\n",
3314                     stcb);
3315                 return;
3316         }
3317         asoc = &stcb->asoc;
3318         asoc->state = 0;
3319         /* now clean up any other timers */
3320         callout_stop(&asoc->hb_timer.timer);
3321         callout_stop(&asoc->dack_timer.timer);
3322         callout_stop(&asoc->asconf_timer.timer);
3323         callout_stop(&asoc->shut_guard_timer.timer);
3324         callout_stop(&asoc->autoclose_timer.timer);
3325         callout_stop(&asoc->delayed_event_timer.timer);
3326         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3327                 callout_stop(&net->rxt_timer.timer);
3328                 callout_stop(&net->pmtu_timer.timer);
3329         }
3330
3331         /* Iterator asoc being freed we send an
3332          * unlocked TCB. It returns with INP_INFO
3333          * and INP write locked and the TCB locked
3334          * too and of course the iterator lock
3335          * in place as well..
3336          */
3337         SCTP_TCB_UNLOCK(stcb);
3338         sctp_iterator_asoc_being_freed(inp, stcb);
3339
3340         /* Null all of my entry's on the socket q */
3341         TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3342                 if (sq->tcb == stcb) {
3343                         sq->tcb = NULL;
3344                 }
3345         }
3346
3347         if (inp->sctp_tcb_at_block == (void *)stcb) {
3348                 inp->error_on_block = ECONNRESET;
3349         }
3350
3351         if (inp->sctp_tcbhash) {
3352                 LIST_REMOVE(stcb, sctp_tcbhash);
3353         }
3354         /* Now lets remove it from the list of ALL associations in the EP */
3355         LIST_REMOVE(stcb, sctp_tcblist);
3356         SCTP_INP_WUNLOCK(inp);
3357         SCTP_ITERATOR_UNLOCK();
3358
3359
3360         /* pull from vtag hash */
3361         LIST_REMOVE(stcb, sctp_asocs);
3362
3363         /*
3364          * Now before we can free the assoc, we must  remove all of the
3365          * networks and any other allocated space.. i.e. add removes here
3366          * before the SCTP_ZONE_FREE() of the tasoc entry.
3367          */
3368
3369         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3370         SCTP_INP_INFO_WUNLOCK();
3371         prev = NULL;
3372         while (!TAILQ_EMPTY(&asoc->nets)) {
3373                 net = TAILQ_FIRST(&asoc->nets);
3374                 /* pull from list */
3375                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3376                         break;
3377                 }
3378                 prev = net;
3379                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3380                 /* free it */
3381                 net->ref_count = 0;
3382                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3383                 sctppcbinfo.ipi_count_raddr--;
3384         }
3385         /*
3386          * The chunk lists and such SHOULD be empty but we check them
3387          * just in case.
3388          */
3389         /* anything on the wheel needs to be removed */
3390         while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3391                 struct sctp_stream_out *outs;
3392                 outs = TAILQ_FIRST(&asoc->out_wheel);
3393                 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3394                 /* now clean up any chunks here */
3395                 chk = TAILQ_FIRST(&outs->outqueue);
3396                 while (chk) {
3397                         TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3398                         if (chk->data) {
3399                                 sctp_m_freem(chk->data);
3400                                 chk->data = NULL;
3401                         }
3402                         chk->whoTo = NULL;
3403                         chk->asoc = NULL;
3404                         /* Free the chunk */
3405                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3406                         sctppcbinfo.ipi_count_chunk--;
3407                         sctppcbinfo.ipi_gencnt_chunk++;
3408                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3409                                 panic("Chunk count is negative");
3410                         }
3411                         chk = TAILQ_FIRST(&outs->outqueue);
3412                 }
3413                 outs = TAILQ_FIRST(&asoc->out_wheel);
3414         }
3415
3416         if (asoc->pending_reply) {
3417                 FREE(asoc->pending_reply, M_PCB);
3418                 asoc->pending_reply = NULL;
3419         }
3420         chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3421         while (chk) {
3422                 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3423                 if (chk->data) {
3424                         sctp_m_freem(chk->data);
3425                         chk->data = NULL;
3426                 }
3427                 chk->whoTo = NULL;
3428                 chk->asoc = NULL;
3429                 /* Free the chunk */
3430                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3431                 sctppcbinfo.ipi_count_chunk--;
3432                 sctppcbinfo.ipi_gencnt_chunk++;
3433                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3434                         panic("Chunk count is negative");
3435                 }
3436                 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3437         }
3438         /* pending send queue SHOULD be empty */
3439         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3440                 chk = TAILQ_FIRST(&asoc->send_queue);
3441                 while (chk) {
3442                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3443                         if (chk->data) {
3444                                 sctp_m_freem(chk->data);
3445                                 chk->data = NULL;
3446                         }
3447                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3448                         sctppcbinfo.ipi_count_chunk--;
3449                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3450                                 panic("Chunk count is negative");
3451                         }
3452                         sctppcbinfo.ipi_gencnt_chunk++;
3453                         chk = TAILQ_FIRST(&asoc->send_queue);
3454                 }
3455         }
3456         /* sent queue SHOULD be empty */
3457         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3458                 chk = TAILQ_FIRST(&asoc->sent_queue);
3459                 while (chk) {
3460                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3461                         if (chk->data) {
3462                                 sctp_m_freem(chk->data);
3463                                 chk->data = NULL;
3464                         }
3465                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3466                         sctppcbinfo.ipi_count_chunk--;
3467                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3468                                 panic("Chunk count is negative");
3469                         }
3470                         sctppcbinfo.ipi_gencnt_chunk++;
3471                         chk = TAILQ_FIRST(&asoc->sent_queue);
3472                 }
3473         }
3474         /* control queue MAY not be empty */
3475         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3476                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3477                 while (chk) {
3478                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3479                         if (chk->data) {
3480                                 sctp_m_freem(chk->data);
3481                                 chk->data = NULL;
3482                         }
3483                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3484                         sctppcbinfo.ipi_count_chunk--;
3485                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3486                                 panic("Chunk count is negative");
3487                         }
3488                         sctppcbinfo.ipi_gencnt_chunk++;
3489                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3490                 }
3491         }
3492         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3493                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3494                 while (chk) {
3495                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3496                         if (chk->data) {
3497                                 sctp_m_freem(chk->data);
3498                                 chk->data = NULL;
3499                         }
3500                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3501                         sctppcbinfo.ipi_count_chunk--;
3502                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3503                                 panic("Chunk count is negative");
3504                         }
3505                         sctppcbinfo.ipi_gencnt_chunk++;
3506                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3507                 }
3508         }
3509         if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3510                 chk = TAILQ_FIRST(&asoc->delivery_queue);
3511                 while (chk) {
3512                         TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3513                         if (chk->data) {
3514                                 sctp_m_freem(chk->data);
3515                                 chk->data = NULL;
3516                         }
3517                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3518                         sctppcbinfo.ipi_count_chunk--;
3519                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3520                                 panic("Chunk count is negative");
3521                         }
3522                         sctppcbinfo.ipi_gencnt_chunk++;
3523                         chk = TAILQ_FIRST(&asoc->delivery_queue);
3524                 }
3525         }
3526         if (asoc->mapping_array) {
3527                 FREE(asoc->mapping_array, M_PCB);
3528                 asoc->mapping_array = NULL;
3529         }
3530
3531         /* the stream outs */
3532         if (asoc->strmout) {
3533                 FREE(asoc->strmout, M_PCB);
3534                 asoc->strmout = NULL;
3535         }
3536         asoc->streamoutcnt = 0;
3537         if (asoc->strmin) {
3538                 int i;
3539                 for (i = 0; i < asoc->streamincnt; i++) {
3540                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3541                                 /* We have somethings on the streamin queue */
3542                                 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3543                                 while (chk) {
3544                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3545                                             chk, sctp_next);
3546                                         if (chk->data) {
3547                                                 sctp_m_freem(chk->data);
3548                                                 chk->data = NULL;
3549                                         }
3550                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3551                                             chk);
3552                                         sctppcbinfo.ipi_count_chunk--;
3553                                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3554                                                 panic("Chunk count is negative");
3555                                         }
3556                                         sctppcbinfo.ipi_gencnt_chunk++;
3557                                         chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3558                                 }
3559                         }
3560                 }
3561                 FREE(asoc->strmin, M_PCB);
3562                 asoc->strmin = NULL;
3563         }
3564         asoc->streamincnt = 0;
3565         /* local addresses, if any */
3566         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3567                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3568                 LIST_REMOVE(laddr, sctp_nxt_addr);
3569                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3570                 sctppcbinfo.ipi_count_laddr--;
3571         }
3572         /* pending asconf (address) parameters */
3573         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3574                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3575                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3576                 FREE(aparam, M_PCB);
3577         }
3578         if (asoc->last_asconf_ack_sent != NULL) {
3579                 sctp_m_freem(asoc->last_asconf_ack_sent);
3580                 asoc->last_asconf_ack_sent = NULL;
3581         }
3582         /* Insert new items here :> */
3583
3584         /* Get rid of LOCK */
3585         SCTP_TCB_LOCK_DESTROY(stcb);
3586
3587         /* now clean up the tasoc itself */
3588         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3589         sctppcbinfo.ipi_count_asoc--;
3590         if ((inp->sctp_socket->so_snd.ssb_cc) ||
3591             (inp->sctp_socket->so_snd.ssb_mbcnt)) {
3592                 /* This will happen when a abort is done */
3593                 inp->sctp_socket->so_snd.ssb_cc = 0;
3594                 inp->sctp_socket->so_snd.ssb_mbcnt = 0;
3595         }
3596         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3597                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3598                         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3599                                 /*
3600                                  * For the base fd, that is NOT in TCP pool we
3601                                  * turn off the connected flag. This allows
3602                                  * non-listening endpoints to connect/shutdown/
3603                                  * connect.
3604                                  */
3605                                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3606                                 soisdisconnected(inp->sctp_socket);
3607                         }
3608                         /*
3609                          * For those that are in the TCP pool we just leave
3610                          * so it cannot be used. When they close the fd we
3611                          * will free it all.
3612                          */
3613                 }
3614         }
3615         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3616                 sctp_inpcb_free(inp, 0);
3617         }
3618 }
3619
3620
3621 /*
3622  * determine if a destination is "reachable" based upon the addresses
3623  * bound to the current endpoint (e.g. only v4 or v6 currently bound)
3624  */
3625 /*
3626  * FIX: if we allow assoc-level bindx(), then this needs to be fixed
3627  * to use assoc level v4/v6 flags, as the assoc *may* not have the
3628  * same address types bound as its endpoint
3629  */
3630 int
3631 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
3632 {
3633         struct sctp_inpcb *inp;
3634         int answer;
3635
3636         /* No locks here, the TCB, in all cases is already
3637          * locked and an assoc is up. There is either a
3638          * INP lock by the caller applied (in asconf case when
3639          * deleting an address) or NOT in the HB case, however
3640          * if HB then the INP increment is up and the INP
3641          * will not be removed (on top of the fact that
3642          * we have a TCB lock). So we only want to
3643          * read the sctp_flags, which is either bound-all
3644          * or not.. no protection needed since once an
3645          * assoc is up you can't be changing your binding.
3646          */
3647         inp = stcb->sctp_ep;
3648         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3649                 /* if bound all, destination is not restricted */
3650                 /* RRS: Question during lock work: Is this
3651                  * correct? If you are bound-all you still
3652                  * might need to obey the V4--V6 flags???
3653                  * IMO this bound-all stuff needs to be removed!
3654                  */
3655                 return (1);
3656         }
3657         /* NOTE: all "scope" checks are done when local addresses are added */
3658         if (destaddr->sa_family == AF_INET6) {
3659 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3660                 answer = inp->inp_vflag & INP_IPV6;
3661 #else
3662                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
3663 #endif
3664         } else if (destaddr->sa_family == AF_INET) {
3665 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3666                 answer = inp->inp_vflag & INP_IPV4;
3667 #else
3668                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
3669 #endif
3670         } else {
3671                 /* invalid family, so it's unreachable */
3672                 answer = 0;
3673         }
3674         return (answer);
3675 }
3676
3677 /*
3678  * update the inp_vflags on an endpoint
3679  */
3680 static void
3681 sctp_update_ep_vflag(struct sctp_inpcb *inp) {
3682         struct sctp_laddr *laddr;
3683
3684         /* first clear the flag */
3685 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3686         inp->inp_vflag = 0;
3687 #else
3688         inp->ip_inp.inp.inp_vflag = 0;
3689 #endif
3690         /* set the flag based on addresses on the ep list */
3691         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3692                 if (laddr->ifa == NULL) {
3693 #ifdef SCTP_DEBUG
3694                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3695                                 kprintf("An ounce of prevention is worth a pound of cure\n");
3696                         }
3697 #endif /* SCTP_DEBUG */
3698                         continue;
3699                 }
3700                 if (laddr->ifa->ifa_addr) {
3701                         continue;
3702                 }
3703                 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
3704 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3705                         inp->inp_vflag |= INP_IPV6;
3706 #else
3707                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3708 #endif
3709                 } else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
3710 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3711                         inp->inp_vflag |= INP_IPV4;
3712 #else
3713                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3714 #endif
3715                 }
3716         }
3717 }
3718
3719 /*
3720  * Add the address to the endpoint local address list
3721  * There is nothing to be done if we are bound to all addresses
3722  */
3723 int
3724 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3725 {
3726         struct sctp_laddr *laddr;
3727         int fnd, error;
3728         fnd = 0;
3729
3730         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3731                 /* You are already bound to all. You have it already */
3732                 return (0);
3733         }
3734         if (ifa->ifa_addr->sa_family == AF_INET6) {
3735                 struct in6_ifaddr *ifa6;
3736                 ifa6 = (struct in6_ifaddr *)ifa;
3737                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3738                     IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
3739                         /* Can't bind a non-existent addr. */
3740                         return (-1);
3741         }
3742         /* first, is it already present? */
3743         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3744                 if (laddr->ifa == ifa) {
3745                         fnd = 1;
3746                         break;
3747                 }
3748         }
3749
3750         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
3751                 /* Not bound to all */
3752                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
3753                 if (error != 0)
3754                         return (error);
3755                 inp->laddr_count++;
3756                 /* update inp_vflag flags */
3757                 if (ifa->ifa_addr->sa_family == AF_INET6) {
3758 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3759                         inp->inp_vflag |= INP_IPV6;
3760 #else
3761                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3762 #endif
3763                 } else if (ifa->ifa_addr->sa_family == AF_INET) {
3764 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3765                         inp->inp_vflag |= INP_IPV4;
3766 #else
3767                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3768 #endif
3769                 }
3770         }
3771         return (0);
3772 }
3773
3774
3775 /*
3776  * select a new (hopefully reachable) destination net
3777  * (should only be used when we deleted an ep addr that is the
3778  * only usable source address to reach the destination net)
3779  */
3780 static void
3781 sctp_select_primary_destination(struct sctp_tcb *stcb)
3782 {
3783         struct sctp_nets *net;
3784
3785         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3786                 /* for now, we'll just pick the first reachable one we find */
3787                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
3788                         continue;
3789                 if (sctp_destination_is_reachable(stcb,
3790                     (struct sockaddr *)&net->ro._l_addr)) {
3791                         /* found a reachable destination */
3792                         stcb->asoc.primary_destination = net;
3793                 }
3794         }
3795         /* I can't there from here! ...we're gonna die shortly... */
3796 }
3797
3798
3799 /*
3800  * Delete the address from the endpoint local address list
3801  * There is nothing to be done if we are bound to all addresses
3802  */
3803 int
3804 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3805 {
3806         struct sctp_laddr *laddr;
3807         int fnd;
3808         fnd = 0;
3809         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3810                 /* You are already bound to all. You have it already */
3811                 return (EINVAL);
3812         }
3813
3814         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3815                 if (laddr->ifa == ifa) {
3816                         fnd = 1;
3817                         break;
3818                 }
3819         }
3820         if (fnd && (inp->laddr_count < 2)) {
3821                 /* can't delete unless there are at LEAST 2 addresses */
3822                 return (-1);
3823         }
3824         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
3825                 /*
3826                  * clean up any use of this address
3827                  * go through our associations and clear any
3828                  *  last_used_address that match this one
3829                  * for each assoc, see if a new primary_destination is needed
3830                  */
3831                 struct sctp_tcb *stcb;
3832
3833                 /* clean up "next_addr_touse" */
3834                 if (inp->next_addr_touse == laddr)
3835                         /* delete this address */
3836                         inp->next_addr_touse = NULL;
3837
3838                 /* clean up "last_used_address" */
3839                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3840                         if (stcb->asoc.last_used_address == laddr)
3841                                 /* delete this address */
3842                                 stcb->asoc.last_used_address = NULL;
3843                 } /* for each tcb */
3844
3845                 /* remove it from the ep list */
3846                 sctp_remove_laddr(laddr);
3847                 inp->laddr_count--;
3848                 /* update inp_vflag flags */
3849                 sctp_update_ep_vflag(inp);
3850                 /* select a new primary destination if needed */
3851                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3852                         /* presume caller (sctp_asconf.c) already owns INP lock */
3853                         SCTP_TCB_LOCK(stcb);
3854                         if (sctp_destination_is_reachable(stcb,
3855                             (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr) == 0) {
3856                                 sctp_select_primary_destination(stcb);
3857                         }
3858                         SCTP_TCB_UNLOCK(stcb);
3859                 } /* for each tcb */
3860         }
3861         return (0);
3862 }
3863
3864 /*
3865  * Add the addr to the TCB local address list
3866  * For the BOUNDALL or dynamic case, this is a "pending" address list
3867  * (eg. addresses waiting for an ASCONF-ACK response)
3868  * For the subset binding, static case, this is a "valid" address list
3869  */
3870 int
3871 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3872 {
3873         struct sctp_inpcb *inp;
3874         struct sctp_laddr *laddr;
3875         int error;
3876
3877         /* Assumes TCP is locked.. and possiblye
3878          * the INP. May need to confirm/fix that if
3879          * we need it and is not the case.
3880          */
3881         inp = stcb->sctp_ep;
3882         if (ifa->ifa_addr->sa_family == AF_INET6) {
3883                 struct in6_ifaddr *ifa6;
3884                 ifa6 = (struct in6_ifaddr *)ifa;
3885                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3886                     /* IN6_IFF_DEPRECATED | */
3887                     IN6_IFF_ANYCAST |
3888                     IN6_IFF_NOTREADY))
3889                         /* Can't bind a non-existent addr. */
3890                         return (-1);
3891         }
3892         /* does the address already exist? */
3893         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3894                 if (laddr->ifa == ifa) {
3895                         return (-1);
3896                 }
3897         }
3898
3899         /* add to the list */
3900         error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
3901         if (error != 0)
3902                 return (error);
3903         return (0);
3904 }
3905
3906 /*
3907  * insert an laddr entry with the given ifa for the desired list
3908  */
3909 int
3910 sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa) {
3911         struct sctp_laddr *laddr;
3912
3913         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
3914         if (laddr == NULL) {
3915                 /* out of memory? */
3916                 return (EINVAL);
3917         }
3918         sctppcbinfo.ipi_count_laddr++;
3919         sctppcbinfo.ipi_gencnt_laddr++;
3920         bzero(laddr, sizeof(*laddr));
3921         laddr->ifa = ifa;
3922         /* insert it */
3923         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
3924
3925         return (0);
3926 }
3927
3928 /*
3929  * Remove an laddr entry from the local address list (on an assoc)
3930  */
3931 void
3932 sctp_remove_laddr(struct sctp_laddr *laddr)
3933 {
3934         /* remove from the list */
3935         LIST_REMOVE(laddr, sctp_nxt_addr);
3936         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3937         sctppcbinfo.ipi_count_laddr--;
3938         sctppcbinfo.ipi_gencnt_laddr++;
3939 }
3940
3941 /*
3942  * Remove an address from the TCB local address list
3943  */
3944 int
3945 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3946 {
3947         struct sctp_inpcb *inp;
3948         struct sctp_laddr *laddr;
3949
3950         /* This is called by asconf work. It is assumed that
3951          * a) The TCB is locked
3952          * and
3953          * b) The INP is locked.
3954          * This is true in as much as I can trace through
3955          * the entry asconf code where I did these locks.
3956          * Again, the ASCONF code is a bit different in
3957          * that it does lock the INP during its work often
3958          * times. This must be since we don't want other
3959          * proc's looking up things while what they are
3960          * looking up is changing :-D
3961          */
3962
3963         inp = stcb->sctp_ep;
3964         /* if subset bound and don't allow ASCONF's, can't delete last */
3965         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
3966             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
3967                 if (stcb->asoc.numnets < 2) {
3968                         /* can't delete last address */
3969                         return (-1);
3970                 }
3971         }
3972
3973         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3974                 /* remove the address if it exists */
3975                 if (laddr->ifa == NULL)
3976                         continue;
3977                 if (laddr->ifa == ifa) {
3978                         sctp_remove_laddr(laddr);
3979                         return (0);
3980                 }
3981         }
3982
3983         /* address not found! */
3984         return (-1);
3985 }
3986
3987 /*
3988  * Remove an address from the TCB local address list
3989  * lookup using a sockaddr addr
3990  */
3991 int
3992 sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
3993 {
3994         struct sctp_inpcb *inp;
3995         struct sctp_laddr *laddr;
3996         struct sockaddr *l_sa;
3997
3998         /*
3999          * This function I find does not seem to have a caller.
4000          * As such we NEED TO DELETE this code. If we do
4001          * find a caller, the caller MUST have locked the TCB
4002          * at the least and probably the INP as well.
4003          */
4004         inp = stcb->sctp_ep;
4005         /* if subset bound and don't allow ASCONF's, can't delete last */
4006         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4007             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4008                 if (stcb->asoc.numnets < 2) {
4009                         /* can't delete last address */
4010                         return (-1);
4011                 }
4012         }
4013
4014         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4015                 /* make sure the address exists */
4016                 if (laddr->ifa == NULL)
4017                         continue;
4018                 if (laddr->ifa->ifa_addr == NULL)
4019                         continue;
4020
4021                 l_sa = laddr->ifa->ifa_addr;
4022                 if (l_sa->sa_family == AF_INET6) {
4023                         /* IPv6 address */
4024                         struct sockaddr_in6 *sin1, *sin2;
4025                         sin1 = (struct sockaddr_in6 *)l_sa;
4026                         sin2 = (struct sockaddr_in6 *)sa;
4027                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4028                             sizeof(struct in6_addr)) == 0) {
4029                                 /* matched */
4030                                 sctp_remove_laddr(laddr);
4031                                 return (0);
4032                         }
4033                 } else if (l_sa->sa_family == AF_INET) {
4034                         /* IPv4 address */
4035                         struct sockaddr_in *sin1, *sin2;
4036                         sin1 = (struct sockaddr_in *)l_sa;
4037                         sin2 = (struct sockaddr_in *)sa;
4038                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4039                                 /* matched */
4040                                 sctp_remove_laddr(laddr);
4041                                 return (0);
4042                         }
4043                 } else {
4044                         /* invalid family */
4045                         return (-1);
4046                 }
4047         } /* end foreach */
4048         /* address not found! */
4049         return (-1);
4050 }
4051
4052 static char sctp_pcb_initialized = 0;
4053
4054 #if defined(__FreeBSD__) || defined(__APPLE__)
4055 /* sysctl */
4056 /* not used by DragonFly SCTP_ZONE_INIT macro */
4057 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4058 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4059
4060 #endif /* FreeBSD || APPLE || DragonFly */
4061
4062 #ifndef SCTP_TCBHASHSIZE
4063 #define SCTP_TCBHASHSIZE 1024
4064 #endif
4065
4066 #ifndef SCTP_CHUNKQUEUE_SCALE
4067 #define SCTP_CHUNKQUEUE_SCALE 10
4068 #endif
4069
4070 void
4071 sctp_pcb_init(void)
4072 {
4073         /*
4074          * SCTP initialization for the PCB structures
4075          * should be called by the sctp_init() funciton.
4076          */
4077         int i;
4078         int hashtblsize = SCTP_TCBHASHSIZE;
4079
4080 #if defined(__FreeBSD__) || defined(__APPLE__)
4081         /* not used by DragonFly SCTP_ZONE_INIT macro */
4082         int sctp_chunkscale = SCTP_CHUNKQUEUE_SCALE;
4083 #endif
4084
4085         if (sctp_pcb_initialized != 0) {
4086                 /* error I was called twice */
4087                 return;
4088         }
4089         sctp_pcb_initialized = 1;
4090
4091         /* Init all peg counts */
4092         for (i = 0; i < SCTP_NUMBER_OF_PEGS; i++) {
4093                 sctp_pegs[i] = 0;
4094         }
4095
4096         /* init the empty list of (All) Endpoints */
4097         LIST_INIT(&sctppcbinfo.listhead);
4098
4099         /* init the iterator head */
4100         LIST_INIT(&sctppcbinfo.iteratorhead);
4101
4102         /* init the hash table of endpoints */
4103 #if defined(__FreeBSD__)
4104 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
4105         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &hashtblsize);
4106         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4107         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4108 #else
4109         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
4110             hashtblsize);
4111         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
4112             sctp_pcbtblsize);
4113         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
4114             sctp_chunkscale);
4115 #endif
4116 #endif
4117
4118         sctppcbinfo.sctp_asochash = hashinit((hashtblsize * 31),
4119 #ifdef __NetBSD__
4120             HASH_LIST,
4121 #endif
4122             M_PCB,
4123 #if defined(__NetBSD__) || defined(__OpenBSD__)
4124             M_WAITOK,
4125 #endif
4126             &sctppcbinfo.hashasocmark);
4127
4128         sctppcbinfo.sctp_ephash = hashinit(hashtblsize,
4129 #ifdef __NetBSD__
4130             HASH_LIST,
4131 #endif
4132             M_PCB,
4133 #if defined(__NetBSD__) || defined(__OpenBSD__)
4134             M_WAITOK,
4135 #endif
4136             &sctppcbinfo.hashmark);
4137
4138         sctppcbinfo.sctp_tcpephash = hashinit(hashtblsize,
4139 #ifdef __NetBSD__
4140             HASH_LIST,
4141 #endif
4142             M_PCB,
4143 #if defined(__NetBSD__) || defined(__OpenBSD__)
4144             M_WAITOK,
4145 #endif
4146             &sctppcbinfo.hashtcpmark);
4147
4148         sctppcbinfo.hashtblsize = hashtblsize;
4149
4150         /* init the zones */
4151         /*
4152          * FIX ME: Should check for NULL returns, but if it does fail we
4153          * are doomed to panic anyways... add later maybe.
4154          */
4155         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4156             sizeof(struct sctp_inpcb), maxsockets);
4157
4158         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4159             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4160
4161         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4162             sizeof(struct sctp_laddr),
4163             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4164
4165         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4166             sizeof(struct sctp_nets),
4167             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4168
4169         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4170             sizeof(struct sctp_tmit_chunk),
4171             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4172             sctp_chunkscale));
4173
4174         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_sockq, "sctp_sockq",
4175             sizeof(struct sctp_socket_q_list),
4176             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4177             sctp_chunkscale));
4178
4179         /* Master Lock INIT for info structure */
4180         SCTP_INP_INFO_LOCK_INIT();
4181         SCTP_ITERATOR_LOCK_INIT();
4182         /* not sure if we need all the counts */
4183         sctppcbinfo.ipi_count_ep = 0;
4184         sctppcbinfo.ipi_gencnt_ep = 0;
4185         /* assoc/tcb zone info */
4186         sctppcbinfo.ipi_count_asoc = 0;
4187         sctppcbinfo.ipi_gencnt_asoc = 0;
4188         /* local addrlist zone info */
4189         sctppcbinfo.ipi_count_laddr = 0;
4190         sctppcbinfo.ipi_gencnt_laddr = 0;
4191         /* remote addrlist zone info */
4192         sctppcbinfo.ipi_count_raddr = 0;
4193         sctppcbinfo.ipi_gencnt_raddr = 0;
4194         /* chunk info */
4195         sctppcbinfo.ipi_count_chunk = 0;
4196         sctppcbinfo.ipi_gencnt_chunk = 0;
4197
4198         /* socket queue zone info */
4199         sctppcbinfo.ipi_count_sockq = 0;
4200         sctppcbinfo.ipi_gencnt_sockq = 0;
4201
4202         /* mbuf tracker */
4203         sctppcbinfo.mbuf_track = 0;
4204         /* port stuff */
4205 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) \
4206     || defined(__DragonFly__)
4207         sctppcbinfo.lastlow = ipport_firstauto;
4208 #else
4209         sctppcbinfo.lastlow = anonportmin;
4210 #endif
4211         /* Init the TIMEWAIT list */
4212         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4213                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4214         }
4215
4216 #if defined(_SCTP_NEEDS_CALLOUT_) && !defined(__APPLE__)
4217         TAILQ_INIT(&sctppcbinfo.callqueue);
4218 #endif
4219
4220 }
4221
4222 int
4223 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4224     int iphlen, int offset, int limit, struct sctphdr *sh,
4225     struct sockaddr *altsa)
4226 {
4227         /*
4228          * grub through the INIT pulling addresses and
4229          * loading them to the nets structure in the asoc.
4230          * The from address in the mbuf should also be loaded
4231          * (if it is not already). This routine can be called
4232          * with either INIT or INIT-ACK's as long as the
4233          * m points to the IP packet and the offset points
4234          * to the beginning of the parameters.
4235          */
4236         struct sctp_inpcb *inp, *l_inp;
4237         struct sctp_nets *net, *net_tmp;
4238         struct ip *iph;
4239         struct sctp_paramhdr *phdr, parm_buf;
4240         struct sctp_tcb *stcb_tmp;
4241         u_int16_t ptype, plen;
4242         struct sockaddr *sa;
4243         struct sockaddr_storage dest_store;
4244         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4245         struct sockaddr_in sin;
4246         struct sockaddr_in6 sin6;
4247
4248         /* First get the destination address setup too. */
4249         memset(&sin, 0, sizeof(sin));
4250         memset(&sin6, 0, sizeof(sin6));
4251
4252         sin.sin_family = AF_INET;
4253         sin.sin_len = sizeof(sin);
4254         sin.sin_port = stcb->rport;
4255
4256         sin6.sin6_family = AF_INET6;
4257         sin6.sin6_len = sizeof(struct sockaddr_in6);
4258         sin6.sin6_port = stcb->rport;
4259         if (altsa == NULL) {
4260                 iph = mtod(m, struct ip *);
4261                 if (iph->ip_v == IPVERSION) {
4262                         /* its IPv4 */
4263                         struct sockaddr_in *sin_2;
4264                         sin_2 = (struct sockaddr_in *)(local_sa);
4265                         memset(sin_2, 0, sizeof(sin));
4266                         sin_2->sin_family = AF_INET;
4267                         sin_2->sin_len = sizeof(sin);
4268                         sin_2->sin_port = sh->dest_port;
4269                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr ;
4270                         sin.sin_addr = iph->ip_src;
4271                         sa = (struct sockaddr *)&sin;
4272                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4273                         /* its IPv6 */
4274                         struct ip6_hdr *ip6;
4275                         struct sockaddr_in6 *sin6_2;
4276
4277                         ip6 = mtod(m, struct ip6_hdr *);
4278                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4279                         memset(sin6_2, 0, sizeof(sin6));
4280                         sin6_2->sin6_family = AF_INET6;
4281                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4282                         sin6_2->sin6_port = sh->dest_port;
4283                         sin6.sin6_addr = ip6->ip6_src;
4284                         sa = (struct sockaddr *)&sin6;
4285                 } else {
4286                         sa = NULL;
4287                 }
4288         } else {
4289                 /*
4290                  * For cookies we use the src address NOT from the packet
4291                  * but from the original INIT
4292                  */
4293                 sa = altsa;
4294         }
4295         /* Turn off ECN until we get through all params */
4296         stcb->asoc.ecn_allowed = 0;
4297
4298         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4299                 /* mark all addresses that we have currently on the list */
4300                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4301         }
4302         /* does the source address already exist? if so skip it */
4303         l_inp = inp = stcb->sctp_ep;
4304         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4305         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4306                 /* we must add the source address */
4307                 /* no scope set here since we have a tcb already. */
4308                 if ((sa->sa_family == AF_INET) &&
4309                     (stcb->asoc.ipv4_addr_legal)) {
4310                         if (sctp_add_remote_addr(stcb, sa, 0, 2)) {
4311                                 return (-1);
4312                         }
4313                 } else if ((sa->sa_family == AF_INET6) &&
4314                     (stcb->asoc.ipv6_addr_legal)) {
4315                         if (sctp_add_remote_addr(stcb, sa, 0, 3)) {
4316                                 return (-1);
4317                         }
4318                 }
4319         } else {
4320                 if (net_tmp != NULL && stcb_tmp == stcb) {
4321                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4322                 } else if (stcb_tmp != stcb) {
4323                         /* It belongs to another association? */
4324                         return (-1);
4325                 }
4326         }
4327         /* since a unlock occured we must check the
4328          * TCB's state and the pcb's gone flags.
4329          */
4330         if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4331                 /* the user freed the ep */
4332                 return (-1);
4333         }
4334         if (stcb->asoc.state == 0) {
4335                 /* the assoc was freed? */
4336                 return (-1);
4337         }
4338
4339         /* now we must go through each of the params. */
4340         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4341         while (phdr) {
4342                 ptype = ntohs(phdr->param_type);
4343                 plen = ntohs(phdr->param_length);
4344                 /*kprintf("ptype => %d, plen => %d\n", ptype, plen);*/
4345                 if (offset + plen > limit) {
4346                         break;
4347                 }
4348                 if (plen == 0) {
4349                         break;
4350                 }
4351                 if ((ptype == SCTP_IPV4_ADDRESS) &&
4352                     (stcb->asoc.ipv4_addr_legal)) {
4353                         struct sctp_ipv4addr_param *p4, p4_buf;
4354                         /* ok get the v4 address and check/add */
4355                         phdr = sctp_get_next_param(m, offset,
4356                             (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4357                         if (plen != sizeof(struct sctp_ipv4addr_param) ||
4358                             phdr == NULL) {
4359                                 return (-1);
4360                         }
4361                         p4 = (struct sctp_ipv4addr_param *)phdr;
4362                         sin.sin_addr.s_addr = p4->addr;
4363                         sa = (struct sockaddr *)&sin;
4364                         inp = stcb->sctp_ep;
4365                         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4366                             local_sa, stcb);
4367
4368                         if ((stcb_tmp== NULL && inp == stcb->sctp_ep) ||
4369                             inp == NULL) {
4370                                 /* we must add the source address */
4371                                 /* no scope set since we have a tcb already */
4372
4373                                 /* we must validate the state again here */
4374                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4375                                         /* the user freed the ep */
4376                                         return (-1);
4377                                 }
4378                                 if (stcb->asoc.state == 0) {
4379                                         /* the assoc was freed? */
4380                                         return (-1);
4381                                 }
4382                                 if (sctp_add_remote_addr(stcb, sa, 0, 4)) {
4383                                         return (-1);
4384                                 }
4385                         } else if (stcb_tmp == stcb) {
4386                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4387                                         /* the user freed the ep */
4388                                         return (-1);
4389                                 }
4390                                 if (stcb->asoc.state == 0) {
4391                                         /* the assoc was freed? */
4392                                         return (-1);
4393                                 }
4394                                 if (net != NULL) {
4395                                         /* clear flag */
4396                                         net->dest_state &=
4397                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4398                                 }
4399                         } else {
4400                                 /* strange, address is in another assoc?
4401                                  * straighten out locks.
4402                                  */
4403                                 SCTP_TCB_UNLOCK(stcb_tmp);
4404                                 SCTP_INP_RLOCK(inp);
4405                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4406                                         /* the user freed the ep */
4407                                         SCTP_INP_RUNLOCK(l_inp);
4408                                         return (-1);
4409                                 }
4410                                 if (stcb->asoc.state == 0) {
4411                                         /* the assoc was freed? */
4412                                         SCTP_INP_RUNLOCK(l_inp);
4413                                         return (-1);
4414                                 }
4415                                 SCTP_TCB_LOCK(stcb);
4416                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
4417                                 return (-1);
4418                         }
4419                 } else if ((ptype == SCTP_IPV6_ADDRESS) &&
4420                     (stcb->asoc.ipv6_addr_legal)) {
4421                         /* ok get the v6 address and check/add */
4422                         struct sctp_ipv6addr_param *p6, p6_buf;
4423                         phdr = sctp_get_next_param(m, offset,
4424                             (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4425                         if (plen != sizeof(struct sctp_ipv6addr_param) ||
4426                             phdr == NULL) {
4427                                 return (-1);
4428                         }
4429                         p6 = (struct sctp_ipv6addr_param *)phdr;
4430                         memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4431                             sizeof(p6->addr));
4432                         sa = (struct sockaddr *)&sin6;
4433                         inp = stcb->sctp_ep;
4434                         stcb_tmp= sctp_findassociation_ep_addr(&inp, sa, &net,
4435                             local_sa, stcb);
4436                         if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4437                             inp == NULL)) {
4438                                 /* we must validate the state again here */
4439                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4440                                         /* the user freed the ep */
4441                                         return (-1);
4442                                 }
4443                                 if (stcb->asoc.state == 0) {
4444                                         /* the assoc was freed? */
4445                                         return (-1);
4446                                 }
4447                                 /* we must add the address, no scope set */
4448                                 if (sctp_add_remote_addr(stcb, sa, 0, 5)) {
4449                                         return (-1);
4450                                 }
4451                         } else if (stcb_tmp == stcb) {
4452                                 /* we must validate the state again here */
4453                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4454                                         /* the user freed the ep */
4455                                         return (-1);
4456                                 }
4457                                 if (stcb->asoc.state == 0) {
4458                                         /* the assoc was freed? */
4459                                         return (-1);
4460                                 }
4461                                 if (net != NULL) {
4462                                         /* clear flag */
4463                                         net->dest_state &=
4464                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4465                                 }
4466                         } else {
4467                                 /* strange, address is in another assoc?
4468                                  * straighten out locks.
4469                                  */
4470                                 SCTP_TCB_UNLOCK(stcb_tmp);
4471                                 SCTP_INP_RLOCK(l_inp);
4472                                 /* we must validate the state again here */
4473                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4474                                         /* the user freed the ep */
4475                                         SCTP_INP_RUNLOCK(l_inp);
4476                                         return (-1);
4477                                 }
4478                                 if (stcb->asoc.state == 0) {
4479                                         /* the assoc was freed? */
4480                                         SCTP_INP_RUNLOCK(l_inp);
4481                                         return (-1);
4482                                 }
4483                                 SCTP_TCB_LOCK(stcb);
4484                                 SCTP_INP_RUNLOCK(l_inp);
4485                                 return (-1);
4486                         }
4487                 } else if (ptype == SCTP_ECN_CAPABLE) {
4488                         stcb->asoc.ecn_allowed = 1;
4489                 } else if (ptype == SCTP_ULP_ADAPTION) {
4490                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
4491                                 struct sctp_adaption_layer_indication ai, *aip;
4492
4493                                 phdr = sctp_get_next_param(m, offset,
4494                                                            (struct sctp_paramhdr *)&ai, sizeof(ai));
4495                                 aip = (struct sctp_adaption_layer_indication *)phdr;
4496                                 sctp_ulp_notify(SCTP_NOTIFY_ADAPTION_INDICATION,
4497                                                 stcb, ntohl(aip->indication), NULL);
4498                         }
4499                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4500                         struct sctp_asconf_addr_param lstore, *fee;
4501                         struct sctp_asconf_addrv4_param *fii;
4502                         int lptype;
4503                         struct sockaddr *lsa = NULL;
4504
4505                         stcb->asoc.peer_supports_asconf = 1;
4506                         stcb->asoc.peer_supports_asconf_setprim = 1;
4507                         if (plen > sizeof(lstore)) {
4508                                 return (-1);
4509                         }
4510                         phdr = sctp_get_next_param(m, offset,
4511                             (struct sctp_paramhdr *)&lstore, plen);
4512                         if (phdr == NULL) {
4513                                 return (-1);
4514                         }
4515
4516                         fee  = (struct sctp_asconf_addr_param *)phdr;
4517                         lptype = ntohs(fee->addrp.ph.param_type);
4518                         if (lptype == SCTP_IPV4_ADDRESS) {
4519                                 if (plen !=
4520                                     sizeof(struct sctp_asconf_addrv4_param)) {
4521                                         kprintf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4522                                            (int)sizeof(struct sctp_asconf_addrv4_param),
4523                                            plen);
4524                                 } else {
4525                                         fii = (struct sctp_asconf_addrv4_param *)fee;
4526                                         sin.sin_addr.s_addr = fii->addrp.addr;
4527                                         lsa = (struct sockaddr *)&sin;
4528                                 }
4529                         } else if (lptype == SCTP_IPV6_ADDRESS) {
4530                                 if (plen !=
4531                                     sizeof(struct sctp_asconf_addr_param)) {
4532                                         kprintf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4533                                            (int)sizeof(struct sctp_asconf_addr_param),
4534                                            plen);
4535                                 } else {
4536                                         memcpy(sin6.sin6_addr.s6_addr,
4537                                             fee->addrp.addr,
4538                                             sizeof(fee->addrp.addr));
4539                                         lsa = (struct sockaddr *)&sin6;
4540                                 }
4541                         }
4542                         if (lsa) {
4543                                 sctp_set_primary_addr(stcb, sa, NULL);
4544                         }
4545
4546                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4547                         /* Peer supports pr-sctp */
4548                         stcb->asoc.peer_supports_prsctp = 1;
4549                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4550                         /* A supported extension chunk */
4551                         struct sctp_supported_chunk_types_param *pr_supported;
4552                         uint8_t local_store[128];
4553                         int num_ent, i;
4554
4555                         phdr = sctp_get_next_param(m, offset,
4556                             (struct sctp_paramhdr *)&local_store, plen);
4557                         if (phdr == NULL) {
4558                                 return (-1);
4559                         }
4560                         stcb->asoc.peer_supports_asconf = 0;
4561                         stcb->asoc.peer_supports_asconf_setprim = 0;
4562                         stcb->asoc.peer_supports_prsctp = 0;
4563                         stcb->asoc.peer_supports_pktdrop = 0;
4564                         stcb->asoc.peer_supports_strreset = 0;
4565                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4566                         num_ent = plen - sizeof(struct sctp_paramhdr);
4567                         for (i=0; i<num_ent; i++) {
4568                                 switch (pr_supported->chunk_types[i]) {
4569                                 case SCTP_ASCONF:
4570                                         stcb->asoc.peer_supports_asconf = 1;
4571                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4572                                         break;
4573                                 case SCTP_ASCONF_ACK:
4574                                         stcb->asoc.peer_supports_asconf = 1;
4575                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4576                                         break;
4577                                 case SCTP_FORWARD_CUM_TSN:
4578                                         stcb->asoc.peer_supports_prsctp = 1;
4579                                         break;
4580                                 case SCTP_PACKET_DROPPED:
4581                                         stcb->asoc.peer_supports_pktdrop = 1;
4582                                         break;
4583                                 case SCTP_STREAM_RESET:
4584                                         stcb->asoc.peer_supports_strreset = 1;
4585                                         break;
4586                                 default:
4587                                         /* one I have not learned yet */
4588                                         break;
4589
4590                                 }
4591                         }
4592                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4593                         /* Peer supports ECN-nonce */
4594                         stcb->asoc.peer_supports_ecn_nonce = 1;
4595                         stcb->asoc.ecn_nonce_allowed = 1;
4596                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4597                            (ptype == SCTP_STATE_COOKIE) ||
4598                            (ptype == SCTP_UNRECOG_PARAM) ||
4599                            (ptype == SCTP_COOKIE_PRESERVE) ||
4600                            (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4601                            (ptype == SCTP_ADD_IP_ADDRESS) ||
4602                            (ptype == SCTP_DEL_IP_ADDRESS) ||
4603                            (ptype == SCTP_ERROR_CAUSE_IND) ||
4604                            (ptype == SCTP_SUCCESS_REPORT)) {
4605                         /* don't care */;
4606                 } else {
4607                         if ((ptype & 0x8000) == 0x0000) {
4608                                 /* must stop processing the rest of
4609                                  * the param's. Any report bits were
4610                                  * handled with the call to sctp_arethere_unrecognized_parameters()
4611                                  * when the INIT or INIT-ACK was first seen.
4612                                  */
4613                                 break;
4614                         }
4615                 }
4616                 offset += SCTP_SIZE32(plen);
4617                 if (offset >= limit) {
4618                         break;
4619                 }
4620                 phdr = sctp_get_next_param(m, offset, &parm_buf,
4621                     sizeof(parm_buf));
4622         }
4623         /* Now check to see if we need to purge any addresses */
4624         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
4625                 net_tmp = TAILQ_NEXT(net, sctp_next);
4626                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
4627                     SCTP_ADDR_NOT_IN_ASSOC) {
4628                         /* This address has been removed from the asoc */
4629                         /* remove and free it */
4630                         stcb->asoc.numnets--;
4631                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
4632                         sctp_free_remote_addr(net);
4633                         if (net == stcb->asoc.primary_destination) {
4634                                 stcb->asoc.primary_destination = NULL;
4635                                 sctp_select_primary_destination(stcb);
4636                         }
4637                 }
4638         }
4639         return (0);
4640 }
4641
4642 int
4643 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
4644     struct sctp_nets *net)
4645 {
4646         /* make sure the requested primary address exists in the assoc */
4647         if (net == NULL && sa)
4648                 net = sctp_findnet(stcb, sa);
4649
4650         if (net == NULL) {
4651                 /* didn't find the requested primary address! */
4652                 return (-1);
4653         } else {
4654                 /* set the primary address */
4655                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
4656                         /* Must be confirmed */
4657                         return (-1);
4658                 }
4659                 stcb->asoc.primary_destination = net;
4660                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
4661                 return (0);
4662         }
4663 }
4664
4665
4666 int
4667 sctp_is_vtag_good(struct sctp_inpcb *inp, u_int32_t tag, struct timeval *now)
4668 {
4669         /*
4670          * This function serves two purposes. It will see if a TAG can be
4671          * re-used and return 1 for yes it is ok and 0 for don't use that
4672          * tag.
4673          * A secondary function it will do is purge out old tags that can
4674          * be removed.
4675          */
4676         struct sctpasochead *head;
4677         struct sctpvtaghead *chain;
4678         struct sctp_tagblock *twait_block;
4679         struct sctp_tcb *stcb;
4680
4681         int i;
4682         SCTP_INP_INFO_WLOCK();
4683         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4684         /* First is the vtag in use ? */
4685
4686         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
4687             sctppcbinfo.hashasocmark)];
4688         if (head == NULL) {
4689                 SCTP_INP_INFO_WUNLOCK();
4690                 return (0);
4691         }
4692         LIST_FOREACH(stcb, head, sctp_asocs) {
4693                 if (stcb->asoc.my_vtag == tag) {
4694                         /* We should remove this if and
4695                          * return 0 always if we want vtags
4696                          * unique across all endpoints. For
4697                          * now within a endpoint is ok.
4698                          */
4699                         if (inp == stcb->sctp_ep) {
4700                                 /* bad tag, in use */
4701                                 SCTP_INP_INFO_WUNLOCK();
4702                                 return (0);
4703                         }
4704                 }
4705         }
4706         if (!LIST_EMPTY(chain)) {
4707                 /*
4708                  * Block(s) are present, lets see if we have this tag in
4709                  * the list
4710                  */
4711                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4712                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4713                                 if (twait_block->vtag_block[i].v_tag == 0) {
4714                                         /* not used */
4715                                         continue;
4716                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
4717                                     now->tv_sec) {
4718                                         /* Audit expires this guy */
4719                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4720                                         twait_block->vtag_block[i].v_tag = 0;
4721                                 } else if (twait_block->vtag_block[i].v_tag ==
4722                                     tag) {
4723                                         /* Bad tag, sorry :< */
4724                                         SCTP_INP_INFO_WUNLOCK();
4725                                         return (0);
4726                                 }
4727                         }
4728                 }
4729         }
4730         /* Not found, ok to use the tag */
4731         SCTP_INP_INFO_WUNLOCK();
4732         return (1);
4733 }
4734
4735
4736 /*
4737  * Delete the address from the endpoint local address list
4738  * Lookup using a sockaddr address (ie. not an ifaddr)
4739  */
4740 int
4741 sctp_del_local_addr_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa)
4742 {
4743         struct sctp_laddr *laddr;
4744         struct sockaddr *l_sa;
4745         int found = 0;
4746         /* Here is another function I cannot find a
4747          * caller for. As such we SHOULD delete it
4748          * if we have no users. If we find a user that
4749          * user MUST have the INP locked.
4750          *
4751          */
4752
4753         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4754                 /* You are already bound to all. You have it already */
4755                 return (EINVAL);
4756         }
4757
4758         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4759                 /* make sure the address exists */
4760                 if (laddr->ifa == NULL)
4761                         continue;
4762                 if (laddr->ifa->ifa_addr == NULL)
4763                         continue;
4764
4765                 l_sa = laddr->ifa->ifa_addr;
4766                 if (l_sa->sa_family == AF_INET6) {
4767                         /* IPv6 address */
4768                         struct sockaddr_in6 *sin1, *sin2;
4769                         sin1 = (struct sockaddr_in6 *)l_sa;
4770                         sin2 = (struct sockaddr_in6 *)sa;
4771                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4772                             sizeof(struct in6_addr)) == 0) {
4773                                 /* matched */
4774                                 found = 1;
4775                                 break;
4776                         }
4777                 } else if (l_sa->sa_family == AF_INET) {
4778                         /* IPv4 address */
4779                         struct sockaddr_in *sin1, *sin2;
4780                         sin1 = (struct sockaddr_in *)l_sa;
4781                         sin2 = (struct sockaddr_in *)sa;
4782                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4783                                 /* matched */
4784                                 found = 1;
4785                                 break;
4786                         }
4787                 } else {
4788                         /* invalid family */
4789                         return (-1);
4790                 }
4791         }
4792
4793         if (found && inp->laddr_count < 2) {
4794                 /* can't delete unless there are at LEAST 2 addresses */
4795                 return (-1);
4796         }
4797
4798         if (found && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
4799                 /*
4800                  * remove it from the ep list, this should NOT be
4801                  * done until its really gone from the interface list and
4802                  * we won't be receiving more of these. Probably right
4803                  * away. If we do allow a removal of an address from
4804                  * an association (sub-set bind) than this should NOT
4805                  * be called until the all ASCONF come back from this
4806                  * association.
4807                  */
4808                 sctp_remove_laddr(laddr);
4809                 return (0);
4810         } else {
4811                 return (-1);
4812         }
4813 }
4814
4815 static void
4816 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4817 {
4818         /*
4819          * We must hunt this association for MBUF's past the cumack
4820          * (i.e. out of order data that we can renege on).
4821          */
4822         struct sctp_association *asoc;
4823         struct sctp_tmit_chunk *chk, *nchk;
4824         u_int32_t cumulative_tsn_p1, tsn;
4825         int cnt, strmat, gap;
4826         /* We look for anything larger than the cum-ack + 1 */
4827
4828         asoc = &stcb->asoc;
4829         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
4830         cnt = 0;
4831         /* First look in the re-assembly queue */
4832         chk = TAILQ_FIRST(&asoc->reasmqueue);
4833         while (chk) {
4834                 /* Get the next one */
4835                 nchk = TAILQ_NEXT(chk, sctp_next);
4836                 if (compare_with_wrap(chk->rec.data.TSN_seq,
4837                     cumulative_tsn_p1, MAX_TSN)) {
4838                         /* Yep it is above cum-ack */
4839                         cnt++;
4840                         tsn = chk->rec.data.TSN_seq;
4841                         if (tsn >= asoc->mapping_array_base_tsn) {
4842                                 gap  = tsn - asoc->mapping_array_base_tsn;
4843                         } else {
4844                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
4845                                     tsn + 1;
4846                         }
4847                         asoc->size_on_reasm_queue -= chk->send_size;
4848                         asoc->cnt_on_reasm_queue--;
4849                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
4850                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4851                         if (chk->data) {
4852                                 sctp_m_freem(chk->data);
4853                                 chk->data = NULL;
4854                         }
4855                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4856                         sctppcbinfo.ipi_count_chunk--;
4857                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4858                                 panic("Chunk count is negative");
4859                         }
4860                         sctppcbinfo.ipi_gencnt_chunk++;
4861                 }
4862                 chk = nchk;
4863         }
4864         /* Ok that was fun, now we will drain all the inbound streams? */
4865         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
4866                 chk = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
4867                 while (chk) {
4868                         nchk = TAILQ_NEXT(chk, sctp_next);
4869                         if (compare_with_wrap(chk->rec.data.TSN_seq,
4870                             cumulative_tsn_p1, MAX_TSN)) {
4871                                 /* Yep it is above cum-ack */
4872                                 cnt++;
4873                                 tsn = chk->rec.data.TSN_seq;
4874                                 if (tsn >= asoc->mapping_array_base_tsn) {
4875                                         gap = tsn -
4876                                             asoc->mapping_array_base_tsn;
4877                                 } else {
4878                                         gap = (MAX_TSN -
4879                                             asoc->mapping_array_base_tsn) +
4880                                             tsn + 1;
4881                                 }
4882                                 asoc->size_on_all_streams -= chk->send_size;
4883                                 asoc->cnt_on_all_streams--;
4884
4885                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
4886                                     gap);
4887                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
4888                                     chk, sctp_next);
4889                                 if (chk->data) {
4890                                         sctp_m_freem(chk->data);
4891                                         chk->data = NULL;
4892                                 }
4893                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4894                                 sctppcbinfo.ipi_count_chunk--;
4895                                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4896                                         panic("Chunk count is negative");
4897                                 }
4898                                 sctppcbinfo.ipi_gencnt_chunk++;
4899                         }
4900                         chk = nchk;
4901                 }
4902         }
4903         /*
4904          * Question, should we go through the delivery queue?
4905          * The only reason things are on here is the app not reading OR a
4906          * p-d-api up. An attacker COULD send enough in to initiate the
4907          * PD-API and then send a bunch of stuff to other streams... these
4908          * would wind up on the delivery queue.. and then we would not get
4909          * to them. But in order to do this I then have to back-track and
4910          * un-deliver sequence numbers in streams.. el-yucko. I think for
4911          * now we will NOT look at the delivery queue and leave it to be
4912          * something to consider later. An alternative would be to abort
4913          * the P-D-API with a notification and then deliver the data....
4914          * Or another method might be to keep track of how many times the
4915          * situation occurs and if we see a possible attack underway just
4916          * abort the association.
4917          */
4918 #ifdef SCTP_DEBUG
4919         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
4920                 if (cnt) {
4921                         kprintf("Freed %d chunks from reneg harvest\n", cnt);
4922                 }
4923         }
4924 #endif /* SCTP_DEBUG */
4925
4926         /*
4927          * Another issue, in un-setting the TSN's in the mapping array we
4928          * DID NOT adjust the higest_tsn marker.  This will cause one of
4929          * two things to occur. It may cause us to do extra work in checking
4930          * for our mapping array movement. More importantly it may cause us
4931          * to SACK every datagram. This may not be a bad thing though since
4932          * we will recover once we get our cum-ack above and all this stuff
4933          * we dumped recovered.
4934          */
4935 }
4936
4937 void
4938 sctp_drain(void)
4939 {
4940         /*
4941          * We must walk the PCB lists for ALL associations here. The system
4942          * is LOW on MBUF's and needs help. This is where reneging will
4943          * occur. We really hope this does NOT happen!
4944          */
4945         struct sctp_inpcb *inp;
4946         struct sctp_tcb *stcb;
4947
4948         SCTP_INP_INFO_RLOCK();
4949         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
4950                 /* For each endpoint */
4951                 SCTP_INP_RLOCK(inp);
4952                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4953                         /* For each association */
4954                         SCTP_TCB_LOCK(stcb);
4955                         sctp_drain_mbufs(inp, stcb);
4956                         SCTP_TCB_UNLOCK(stcb);
4957                 }
4958                 SCTP_INP_RUNLOCK(inp);
4959         }
4960         SCTP_INP_INFO_RUNLOCK();
4961 }
4962
4963 int
4964 sctp_add_to_socket_q(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4965 {
4966         struct sctp_socket_q_list *sq;
4967
4968         /* write lock on INP assumed */
4969         if ((inp == NULL) || (stcb == NULL)) {
4970                 /* I am paranoid */
4971                 return (0);
4972         }
4973         sq = (struct sctp_socket_q_list *)SCTP_ZONE_GET(
4974             sctppcbinfo.ipi_zone_sockq);
4975         if (sq == NULL) {
4976                 /* out of sq structs */
4977                 return (0);
4978         }
4979         sctppcbinfo.ipi_count_sockq++;
4980         sctppcbinfo.ipi_gencnt_sockq++;
4981         if (stcb)
4982                 stcb->asoc.cnt_msg_on_sb++;
4983         sq->tcb = stcb;
4984         TAILQ_INSERT_TAIL(&inp->sctp_queue_list, sq, next_sq);
4985         return (1);
4986 }
4987
4988
4989 struct sctp_tcb *
4990 sctp_remove_from_socket_q(struct sctp_inpcb *inp)
4991 {
4992         struct sctp_tcb *stcb = NULL;
4993         struct sctp_socket_q_list *sq;
4994
4995         /* W-Lock on INP assumed held */
4996         sq = TAILQ_FIRST(&inp->sctp_queue_list);
4997         if (sq == NULL)
4998                 return (NULL);
4999
5000         stcb = sq->tcb;
5001         TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
5002         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
5003         sctppcbinfo.ipi_count_sockq--;
5004         sctppcbinfo.ipi_gencnt_sockq++;
5005         if (stcb) {
5006                 stcb->asoc.cnt_msg_on_sb--;
5007         }
5008         return (stcb);
5009 }
5010
5011 int
5012 sctp_initiate_iterator(asoc_func af, uint32_t pcb_state, uint32_t asoc_state,
5013                        void *argp, uint32_t argi, end_func ef,
5014                        struct sctp_inpcb *s_inp)
5015 {
5016         struct sctp_iterator *it=NULL;
5017
5018         if (af == NULL) {
5019                 return (-1);
5020         }
5021         MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), M_PCB,
5022                M_WAITOK);
5023         memset(it, 0, sizeof(*it));
5024         it->function_toapply = af;
5025         it->function_atend = ef;
5026         it->pointer = argp;
5027         it->val = argi;
5028         it->pcb_flags = pcb_state;
5029         it->asoc_state = asoc_state;
5030         if (s_inp) {
5031                 it->inp = s_inp;
5032                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5033         } else {
5034                 SCTP_INP_INFO_RLOCK();
5035                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5036                 SCTP_INP_INFO_RUNLOCK();
5037                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5038
5039         }
5040         /* Init the timer */
5041 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
5042         callout_init(&it->tmr.timer, 0);
5043 #else
5044         callout_init(&it->tmr.timer);
5045 #endif
5046         /* add to the list of all iterators */
5047         SCTP_INP_INFO_WLOCK();
5048         LIST_INSERT_HEAD(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5049         SCTP_INP_INFO_WUNLOCK();
5050         sctp_iterator_timer(it);
5051         return (0);
5052 }
5053
5054
5055 /*
5056  * Callout/Timer routines for OS that doesn't have them
5057  */
5058 #ifdef _SCTP_NEEDS_CALLOUT_
5059 #ifndef __APPLE__
5060 extern int ticks;
5061 #endif
5062
5063 void
5064 callout_init(struct callout *c)
5065 {
5066         bzero(c, sizeof(*c));
5067 }
5068
5069 void
5070 callout_reset(struct callout *c, int to_ticks, void (*ftn)(void *), void *arg)
5071 {
5072         if (c->c_flags & CALLOUT_PENDING)
5073                 callout_stop(c);
5074
5075         /*
5076          * We could spl down here and back up at the TAILQ_INSERT_TAIL,
5077          * but there's no point since doing this setup doesn't take much
5078          * time.
5079          */
5080         if (to_ticks <= 0)
5081                 to_ticks = 1;
5082
5083         c->c_arg = arg;
5084         c->c_flags = (CALLOUT_ACTIVE | CALLOUT_PENDING);
5085         c->c_func = ftn;
5086 #ifdef __APPLE__
5087         c->c_time = to_ticks;   /* just store the requested timeout */
5088         timeout(ftn, arg, to_ticks);
5089 #else
5090         c->c_time = ticks + to_ticks;
5091         TAILQ_INSERT_TAIL(&sctppcbinfo.callqueue, c, tqe);
5092 #endif
5093 }
5094
5095 int
5096 callout_stop(struct callout *c)
5097 {
5098         /*
5099          * Don't attempt to delete a callout that's not on the queue.
5100          */
5101         if (!(c->c_flags & CALLOUT_PENDING)) {
5102                 c->c_flags &= ~CALLOUT_ACTIVE;
5103                 return (0);
5104         }
5105         c->c_flags &= ~(CALLOUT_ACTIVE | CALLOUT_PENDING| CALLOUT_FIRED);
5106 #ifdef __APPLE__
5107 /*      thread_call_cancel(c->c_call); */
5108         untimeout(c->c_func, c->c_arg);
5109 #else
5110         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5111         c->c_func = NULL;
5112 #endif
5113         return (1);
5114 }
5115
5116 #if !defined(__APPLE__)
5117 void
5118 sctp_fasttim(void)
5119 {
5120         struct callout *c, *n;
5121         struct calloutlist locallist;
5122         int inited = 0;
5123
5124         /* run through and subtract and mark all callouts */
5125         c = TAILQ_FIRST(&sctppcbinfo.callqueue);
5126         while (c) {
5127                 n = TAILQ_NEXT(c, tqe);
5128                 if (c->c_time <= ticks) {
5129                         c->c_flags |= CALLOUT_FIRED;
5130                         c->c_time = 0;
5131                         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5132                         if (inited == 0) {
5133                                 TAILQ_INIT(&locallist);
5134                                 inited = 1;
5135                         }
5136                         /* move off of main list */
5137                         TAILQ_INSERT_TAIL(&locallist, c, tqe);
5138                 }
5139                 c = n;
5140         }
5141         /* Now all the ones on the locallist must be called */
5142         if (inited) {
5143                 c = TAILQ_FIRST(&locallist);
5144                 while (c) {
5145                         /* remove it */
5146                         TAILQ_REMOVE(&locallist, c, tqe);
5147                         /* now validate that it did not get canceled */
5148                         if (c->c_flags & CALLOUT_FIRED) {
5149                                 c->c_flags &= ~CALLOUT_PENDING;
5150                                 (*c->c_func)(c->c_arg);
5151                         }
5152                         c = TAILQ_FIRST(&locallist);
5153                 }
5154         }
5155 }
5156 #endif
5157 #endif /* _SCTP_NEEDS_CALLOUT_ */