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 1.2 2005/07/15 15:02:02 eirikn 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/kernel.h>
  62 #include <sys/sysctl.h>
  63 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
  64 #include <sys/random.h>
  65 #endif
  66 #if defined(__NetBSD__)
  67 #include <sys/rnd.h>
  68 #endif
  69 #if defined(__OpenBSD__)
  70 #include <dev/rndvar.h>
  71 #endif
  72
  73 #if defined(__APPLE__)
  74 #include <netinet/sctp_callout.h>
  75 #elif defined(__OpenBSD__)
  76 #include <sys/timeout.h>
  77 #else
  78 #include <sys/callout.h>
  79 #endif
  80
  81 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000)
  82 #include <sys/limits.h>
  83 #else
  84 #include <machine/limits.h>
  85 #endif
  86 #include <machine/cpu.h>
  87
  88 #include <net/if.h>
  89 #include <net/if_types.h>
  90 #include <net/route.h>
  91 #include <netinet/in.h>
  92 #include <netinet/in_systm.h>
  93 #include <netinet/ip.h>
  94 #include <netinet/in_pcb.h>
  95 #include <netinet/in_var.h>
  96 #include <netinet/ip_var.h>
  97
  98 #ifdef INET6
  99 #include <netinet/ip6.h>
 100 #include <netinet6/ip6_var.h>
 101 #include <netinet6/scope6_var.h>
 102 #if defined(__FreeBSD__) || (__NetBSD__) || defined(__DragonFly__)
 103 #include <netinet6/in6_pcb.h>
 104 #elif defined(__OpenBSD__)
 105 #include <netinet/in_pcb.h>
 106 #endif
 107 #endif /* INET6 */
 108
 109 #ifdef IPSEC
 110 #ifndef __OpenBSD__
 111 #include <netinet6/ipsec.h>
 112 #include <netkey/key.h>
 113 #else
 114 #undef IPSEC
 115 #endif
 116 #endif /* IPSEC */
 117
 118 #include <netinet/sctp_var.h>
 119 #include <netinet/sctp_pcb.h>
 120 #include <netinet/sctputil.h>
 121 #include <netinet/sctp.h>
 122 #include <netinet/sctp_header.h>
 123 #include <netinet/sctp_asconf.h>
 124 #include <netinet/sctp_output.h>
 125 #include <netinet/sctp_timer.h>
 126
 127 #ifndef SCTP_PCBHASHSIZE
 128 /* default number of association hash buckets in each endpoint */
 129 #define SCTP_PCBHASHSIZE 256
 130 #endif
 131
 132 #ifdef SCTP_DEBUG
 133 u_int32_t sctp_debug_on = 0;
 134 #endif /* SCTP_DEBUG */
 135
 136 u_int32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];
 137
 138 int sctp_pcbtblsize = SCTP_PCBHASHSIZE;
 139
 140 struct sctp_epinfo sctppcbinfo;
 141
 142 /* FIX: we don't handle multiple link local scopes */
 143 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
 144 int
 145 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
 146 {
 147         struct in6_addr tmp_a, tmp_b;
 148         /* use a copy of a and b */
 149         tmp_a = *a;
 150         tmp_b = *b;
 151         in6_clearscope(&tmp_a);
 152         in6_clearscope(&tmp_b);
 153         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
 154 }
 155
 156 #ifdef __OpenBSD__
 157 extern int ipport_firstauto;
 158 extern int ipport_lastauto;
 159 extern int ipport_hifirstauto;
 160 extern int ipport_hilastauto;
 161 #endif
 162
 163 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
 164
 165 #ifndef xyzzy
 166 void sctp_validate_no_locks(void);
 167
 168 void
 169 SCTP_INP_RLOCK(struct sctp_inpcb *inp)
 170 {
 171         struct sctp_tcb *stcb;
 172         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 173                 if (mtx_owned(&(stcb)->tcb_mtx))
 174                         panic("I own TCB lock?");
 175         }
 176         if (mtx_owned(&(inp)->inp_mtx))
 177                 panic("INP Recursive Lock-R");
 178         mtx_lock(&(inp)->inp_mtx);
 179 }
 180
 181 void
 182 SCTP_INP_WLOCK(struct sctp_inpcb *inp)
 183 {
 184         SCTP_INP_RLOCK(inp);
 185 }
 186
 187 void
 188 SCTP_INP_INFO_RLOCK()
 189 {
 190         struct sctp_inpcb *inp;
 191         struct sctp_tcb *stcb;
 192         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
 193                 if (mtx_owned(&(inp)->inp_mtx))
 194                         panic("info-lock and own inp lock?");
 195                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 196                         if (mtx_owned(&(stcb)->tcb_mtx))
 197                                 panic("Info lock and own a tcb lock?");
 198                 }
 199         }
 200         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
 201                 panic("INP INFO Recursive Lock-R");
 202         mtx_lock(&sctppcbinfo.ipi_ep_mtx);
 203 }
 204
 205 void
 206 SCTP_INP_INFO_WLOCK()
 207 {
 208         SCTP_INP_INFO_RLOCK();
 209 }
 210
 211
 212 void sctp_validate_no_locks()
 213 {
 214         struct sctp_inpcb *inp;
 215         struct sctp_tcb *stcb;
 216
 217         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
 218                 panic("INP INFO lock is owned?");
 219
 220         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
 221                 if (mtx_owned(&(inp)->inp_mtx))
 222                         panic("You own an INP lock?");
 223                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 224                         if (mtx_owned(&(stcb)->tcb_mtx))
 225                                 panic("You own a TCB lock?");
 226                 }
 227         }
 228 }
 229
 230 #endif
 231 #endif
 232
 233 void
 234 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
 235 {
 236         /* We really don't need
 237          * to lock this, but I will
 238          * just because it does not hurt.
 239          */
 240         SCTP_INP_INFO_RLOCK();
 241         spcb->ep_count = sctppcbinfo.ipi_count_ep;
 242         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
 243         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
 244         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
 245         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
 246         spcb->sockq_count = sctppcbinfo.ipi_count_sockq;
 247         spcb->mbuf_track = sctppcbinfo.mbuf_track;
 248         SCTP_INP_INFO_RUNLOCK();
 249 }
 250
 251
 252 /*
 253  * Notes on locks for FreeBSD 5 and up. All association
 254  * lookups that have a definte ep, the INP structure is
 255  * assumed to be locked for reading. If we need to go
 256  * find the INP (ususally when a **inp is passed) then
 257  * we must lock the INFO structure first and if needed
 258  * lock the INP too. Note that if we lock it we must
 259  *
 260  */
 261
 262
 263 /*
 264  * Given a endpoint, look and find in its association list any association
 265  * with the "to" address given. This can be a "from" address, too, for
 266  * inbound packets. For outbound packets it is a true "to" address.
 267  */
 268 static struct sctp_tcb *
 269 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 270                         struct sockaddr *to, struct sctp_nets **netp)
 271 {
 272         /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
 273
 274         /*
 275          * Note for this module care must be taken when observing what to is
 276          * for. In most of the rest of the code the TO field represents my
 277          * peer and the FROM field represents my address. For this module it
 278          * is reversed of that.
 279          */
 280         /*
 281          * If we support the TCP model, then we must now dig through to
 282          * see if we can find our endpoint in the list of tcp ep's.
 283          */
 284         uint16_t lport, rport;
 285         struct sctppcbhead *ephead;
 286         struct sctp_inpcb *inp;
 287         struct sctp_laddr *laddr;
 288         struct sctp_tcb *stcb;
 289         struct sctp_nets *net;
 290
 291         if ((to == NULL) || (from == NULL)) {
 292                 return (NULL);
 293         }
 294
 295         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 296                 lport = ((struct sockaddr_in *)to)->sin_port;
 297                 rport = ((struct sockaddr_in *)from)->sin_port;
 298         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 299                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 300                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 301         } else {
 302                 return NULL;
 303         }
 304         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
 305                                                      (lport + rport), sctppcbinfo.hashtcpmark)];
 306         /*
 307          * Ok now for each of the guys in this bucket we must look
 308          * and see:
 309          *  - Does the remote port match.
 310          *  - Does there single association's addresses match this
 311          *    address (to).
 312          * If so we update p_ep to point to this ep and return the
 313          * tcb from it.
 314          */
 315         LIST_FOREACH(inp, ephead, sctp_hash) {
 316                 if (lport != inp->sctp_lport) {
 317                         continue;
 318                 }
 319                 SCTP_INP_RLOCK(inp);
 320                 /* check to see if the ep has one of the addresses */
 321                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 322                         /* We are NOT bound all, so look further */
 323                         int match = 0;
 324
 325                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 326                                 if (laddr->ifa == NULL) {
 327 #ifdef SCTP_DEBUG
 328                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 329                                                 printf("An ounce of prevention is worth a pound of cure\n");
 330                                         }
 331 #endif
 332                                         continue;
 333                                 }
 334                                 if (laddr->ifa->ifa_addr == NULL) {
 335 #ifdef SCTP_DEBUG
 336                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 337                                                 printf("ifa with a NULL address\n");
 338                                         }
 339 #endif
 340                                         continue;
 341                                 }
 342                                 if (laddr->ifa->ifa_addr->sa_family ==
 343                                     to->sa_family) {
 344                                         /* see if it matches */
 345                                         struct sockaddr_in *intf_addr, *sin;
 346                                         intf_addr = (struct sockaddr_in *)
 347                                                 laddr->ifa->ifa_addr;
 348                                         sin = (struct sockaddr_in *)to;
 349                                         if (from->sa_family == AF_INET) {
 350                                                 if (sin->sin_addr.s_addr ==
 351                                                     intf_addr->sin_addr.s_addr) {
 352                                                         match = 1;
 353                                                         SCTP_INP_RUNLOCK(inp);
 354                                                         break;
 355                                                 }
 356                                         } else {
 357                                                 struct sockaddr_in6 *intf_addr6;
 358                                                 struct sockaddr_in6 *sin6;
 359                                                 sin6 = (struct sockaddr_in6 *)
 360                                                         to;
 361                                                 intf_addr6 = (struct sockaddr_in6 *)
 362                                                         laddr->ifa->ifa_addr;
 363
 364                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 365                                                                          &intf_addr6->sin6_addr)) {
 366                                                         match = 1;
 367                                                         SCTP_INP_RUNLOCK(inp);
 368                                                         break;
 369                                                 }
 370                                         }
 371                                 }
 372                         }
 373                         if (match == 0) {
 374                                 /* This endpoint does not have this address */
 375                                 SCTP_INP_RUNLOCK(inp);
 376                                 continue;
 377                         }
 378                 }
 379                 /*
 380                  * Ok if we hit here the ep has the address, does it hold the
 381                  * tcb?
 382                  */
 383
 384                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 385                 if (stcb == NULL) {
 386                         SCTP_INP_RUNLOCK(inp);
 387                         continue;
 388                 }
 389                 SCTP_TCB_LOCK(stcb);
 390                 if (stcb->rport != rport) {
 391                         /* remote port does not match. */
 392                         SCTP_TCB_UNLOCK(stcb);
 393                         SCTP_INP_RUNLOCK(inp);
 394                         continue;
 395                 }
 396                 /* Does this TCB have a matching address? */
 397                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 398                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 399                                 /* not the same family, can't be a match */
 400                                 continue;
 401                         }
 402                         if (from->sa_family == AF_INET) {
 403                                 struct sockaddr_in *sin, *rsin;
 404                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
 405                                 rsin = (struct sockaddr_in *)from;
 406                                 if (sin->sin_addr.s_addr ==
 407                                     rsin->sin_addr.s_addr) {
 408                                         /* found it */
 409                                         if (netp != NULL) {
 410                                                 *netp = net;
 411                                         }
 412                                         /* Update the endpoint pointer */
 413                                         *inp_p = inp;
 414                                         SCTP_INP_RUNLOCK(inp);
 415                                         return (stcb);
 416                                 }
 417                         } else {
 418                                 struct sockaddr_in6 *sin6, *rsin6;
 419                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 420                                 rsin6 = (struct sockaddr_in6 *)from;
 421                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 422                                                          &rsin6->sin6_addr)) {
 423                                         /* found it */
 424                                         if (netp != NULL) {
 425                                                 *netp = net;
 426                                         }
 427                                         /* Update the endpoint pointer */
 428                                         *inp_p = inp;
 429                                         SCTP_INP_RUNLOCK(inp);
 430                                         return (stcb);
 431                                 }
 432                         }
 433                 }
 434                 SCTP_TCB_UNLOCK(stcb);
 435
 436                 SCTP_INP_RUNLOCK(inp);
 437         }
 438         return (NULL);
 439 }
 440
 441 struct sctp_tcb *
 442 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
 443     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
 444 {
 445         struct sctp_tcb *stcb;
 446         struct sockaddr_in *sin;
 447         struct sockaddr_in6 *sin6;
 448         struct sockaddr_storage local_store, remote_store;
 449         struct ip *iph;
 450         struct sctp_paramhdr parm_buf, *phdr;
 451         int ptype;
 452
 453         memset(&local_store, 0, sizeof(local_store));
 454         memset(&remote_store, 0, sizeof(remote_store));
 455
 456         /* First get the destination address setup too. */
 457         iph = mtod(m, struct ip *);
 458         if (iph->ip_v == IPVERSION) {
 459                 /* its IPv4 */
 460                 sin = (struct sockaddr_in *)&local_store;
 461                 sin->sin_family = AF_INET;
 462                 sin->sin_len = sizeof(*sin);
 463                 sin->sin_port = sh->dest_port;
 464                 sin->sin_addr.s_addr = iph->ip_dst.s_addr ;
 465         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
 466                 /* its IPv6 */
 467                 struct ip6_hdr *ip6;
 468                 ip6 = mtod(m, struct ip6_hdr *);
 469                 sin6 = (struct sockaddr_in6 *)&local_store;
 470                 sin6->sin6_family = AF_INET6;
 471                 sin6->sin6_len = sizeof(*sin6);
 472                 sin6->sin6_port = sh->dest_port;
 473                 sin6->sin6_addr = ip6->ip6_dst;
 474         } else {
 475                 return NULL;
 476         }
 477
 478         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
 479             &parm_buf, sizeof(struct sctp_paramhdr));
 480         if (phdr == NULL) {
 481 #ifdef SCTP_DEBUG
 482                 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 483                         printf("sctp_process_control: failed to get asconf lookup addr\n");
 484                 }
 485 #endif /* SCTP_DEBUG */
 486                 return NULL;
 487         }
 488         ptype = (int)((u_int)ntohs(phdr->param_type));
 489         /* get the correlation address */
 490         if (ptype == SCTP_IPV6_ADDRESS) {
 491                 /* ipv6 address param */
 492                 struct sctp_ipv6addr_param *p6, p6_buf;
 493                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
 494                         return NULL;
 495                 }
 496
 497                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
 498                     offset + sizeof(struct sctp_asconf_chunk),
 499                     &p6_buf.ph, sizeof(*p6));
 500                 if (p6 == NULL) {
 501 #ifdef SCTP_DEBUG
 502                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 503                                 printf("sctp_process_control: failed to get asconf v6 lookup addr\n");
 504                         }
 505 #endif /* SCTP_DEBUG */
 506                         return (NULL);
 507                 }
 508                 sin6 = (struct sockaddr_in6 *)&remote_store;
 509                 sin6->sin6_family = AF_INET6;
 510                 sin6->sin6_len = sizeof(*sin6);
 511                 sin6->sin6_port = sh->src_port;
 512                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
 513         } else if (ptype == SCTP_IPV4_ADDRESS) {
 514                 /* ipv4 address param */
 515                 struct sctp_ipv4addr_param *p4, p4_buf;
 516                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
 517                         return NULL;
 518                 }
 519
 520                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
 521                     offset + sizeof(struct sctp_asconf_chunk),
 522                     &p4_buf.ph, sizeof(*p4));
 523                 if (p4 == NULL) {
 524 #ifdef SCTP_DEBUG
 525                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 526                                 printf("sctp_process_control: failed to get asconf v4 lookup addr\n");
 527                         }
 528 #endif /* SCTP_DEBUG */
 529                         return (NULL);
 530                 }
 531                 sin = (struct sockaddr_in *)&remote_store;
 532                 sin->sin_family = AF_INET;
 533                 sin->sin_len = sizeof(*sin);
 534                 sin->sin_port = sh->src_port;
 535                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
 536         } else {
 537                 /* invalid address param type */
 538                 return NULL;
 539         }
 540
 541         stcb = sctp_findassociation_ep_addr(inp_p,
 542             (struct sockaddr *)&remote_store, netp,
 543             (struct sockaddr *)&local_store, NULL);
 544         return (stcb);
 545 }
 546
 547 struct sctp_tcb *
 548 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 549     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 550 {
 551         struct sctpasochead *head;
 552         struct sctp_inpcb *inp;
 553         struct sctp_tcb *stcb;
 554         struct sctp_nets *net;
 555         uint16_t rport;
 556
 557         inp = *inp_p;
 558         if (remote->sa_family == AF_INET) {
 559                 rport = (((struct sockaddr_in *)remote)->sin_port);
 560         } else if (remote->sa_family == AF_INET6) {
 561                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 562         } else {
 563                 return (NULL);
 564         }
 565         if (locked_tcb) {
 566                 /* UN-lock so we can do proper locking here
 567                  * this occurs when called from load_addresses_from_init.
 568                  */
 569                 SCTP_TCB_UNLOCK(locked_tcb);
 570         }
 571         SCTP_INP_INFO_RLOCK();
 572         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 573                 /*
 574                  * Now either this guy is our listner or it's the connector.
 575                  * If it is the one that issued the connect, then it's only
 576                  * chance is to be the first TCB in the list. If it is the
 577                  * acceptor, then do the special_lookup to hash and find the
 578                  * real inp.
 579                  */
 580                 if (inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) {
 581                         /* to is peer addr, from is my addr */
 582                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 583                                                        netp);
 584                         if ((stcb != NULL) && (locked_tcb == NULL)){
 585                                 /* we have a locked tcb, lower refcount */
 586                                 SCTP_INP_WLOCK(inp);
 587                                 SCTP_INP_DECR_REF(inp);
 588                                 SCTP_INP_WUNLOCK(inp);
 589                         }
 590                         if (locked_tcb != NULL) {
 591                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 592                                 SCTP_TCB_LOCK(locked_tcb);
 593                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 594                                 if (stcb != NULL)
 595                                         SCTP_TCB_UNLOCK(stcb);
 596                         }
 597                         SCTP_INP_INFO_RUNLOCK();
 598                         return (stcb);
 599                 } else {
 600                         SCTP_INP_WLOCK(inp);
 601                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 602                         if (stcb == NULL) {
 603                                 goto null_return;
 604                         }
 605                         SCTP_TCB_LOCK(stcb);
 606                         if (stcb->rport != rport) {
 607                                 /* remote port does not match. */
 608                                 SCTP_TCB_UNLOCK(stcb);
 609                                 goto null_return;
 610                         }
 611                         /* now look at the list of remote addresses */
 612                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 613                                 if (net->ro._l_addr.sa.sa_family !=
 614                                     remote->sa_family) {
 615                                         /* not the same family */
 616                                         continue;
 617                                 }
 618                                 if (remote->sa_family == AF_INET) {
 619                                         struct sockaddr_in *sin, *rsin;
 620                                         sin = (struct sockaddr_in *)
 621                                                 &net->ro._l_addr;
 622                                         rsin = (struct sockaddr_in *)remote;
 623                                         if (sin->sin_addr.s_addr ==
 624                                             rsin->sin_addr.s_addr) {
 625                                                 /* found it */
 626                                                 if (netp != NULL) {
 627                                                         *netp = net;
 628                                                 }
 629                                                 if (locked_tcb == NULL) {
 630                                                         SCTP_INP_DECR_REF(inp);
 631                                                 }
 632                                                 SCTP_INP_WUNLOCK(inp);
 633                                                 SCTP_INP_INFO_RUNLOCK();
 634                                                 return (stcb);
 635                                         }
 636                                 } else if (remote->sa_family == AF_INET6) {
 637                                         struct sockaddr_in6 *sin6, *rsin6;
 638                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 639                                         rsin6 = (struct sockaddr_in6 *)remote;
 640                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 641                                                                  &rsin6->sin6_addr)) {
 642                                                 /* found it */
 643                                                 if (netp != NULL) {
 644                                                         *netp = net;
 645                                                 }
 646                                                 if (locked_tcb == NULL) {
 647                                                         SCTP_INP_DECR_REF(inp);
 648                                                 }
 649                                                 SCTP_INP_WUNLOCK(inp);
 650                                                 SCTP_INP_INFO_RUNLOCK();
 651                                                 return (stcb);
 652                                         }
 653                                 }
 654                         }
 655                         SCTP_TCB_UNLOCK(stcb);
 656                 }
 657         } else {
 658                 SCTP_INP_WLOCK(inp);
 659                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 660                                                                inp->sctp_hashmark)];
 661                 if (head == NULL) {
 662                         goto null_return;
 663                 }
 664                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 665                         if (stcb->rport != rport) {
 666                                 /* remote port does not match */
 667                                 continue;
 668                         }
 669                         /* now look at the list of remote addresses */
 670                         SCTP_TCB_LOCK(stcb);
 671                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 672                                 if (net->ro._l_addr.sa.sa_family !=
 673                                     remote->sa_family) {
 674                                         /* not the same family */
 675                                         continue;
 676                                 }
 677                                 if (remote->sa_family == AF_INET) {
 678                                         struct sockaddr_in *sin, *rsin;
 679                                         sin = (struct sockaddr_in *)
 680                                                 &net->ro._l_addr;
 681                                         rsin = (struct sockaddr_in *)remote;
 682                                         if (sin->sin_addr.s_addr ==
 683                                             rsin->sin_addr.s_addr) {
 684                                                 /* found it */
 685                                                 if (netp != NULL) {
 686                                                         *netp = net;
 687                                                 }
 688                                                 if (locked_tcb == NULL) {
 689                                                         SCTP_INP_DECR_REF(inp);
 690                                                 }
 691                                                 SCTP_INP_WUNLOCK(inp);
 692                                                 SCTP_INP_INFO_RUNLOCK();
 693                                                 return (stcb);
 694                                         }
 695                                 } else if (remote->sa_family == AF_INET6) {
 696                                         struct sockaddr_in6 *sin6, *rsin6;
 697                                         sin6 = (struct sockaddr_in6 *)
 698                                                 &net->ro._l_addr;
 699                                         rsin6 = (struct sockaddr_in6 *)remote;
 700                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 701                                                                  &rsin6->sin6_addr)) {
 702                                                 /* found it */
 703                                                 if (netp != NULL) {
 704                                                         *netp = net;
 705                                                 }
 706                                                 if (locked_tcb == NULL) {
 707                                                         SCTP_INP_DECR_REF(inp);
 708                                                 }
 709                                                 SCTP_INP_WUNLOCK(inp);
 710                                                 SCTP_INP_INFO_RUNLOCK();
 711                                                 return (stcb);
 712                                         }
 713                                 }
 714                         }
 715                         SCTP_TCB_UNLOCK(stcb);
 716                 }
 717         }
 718  null_return:
 719         /* clean up for returning null */
 720         if (locked_tcb){
 721                 if (locked_tcb->sctp_ep != inp) {
 722                         SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 723                         SCTP_TCB_LOCK(locked_tcb);
 724                         SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 725                 } else
 726                         SCTP_TCB_LOCK(locked_tcb);
 727         }
 728         SCTP_INP_WUNLOCK(inp);
 729         SCTP_INP_INFO_RUNLOCK();
 730         /* not found */
 731         return (NULL);
 732 }
 733
 734 /*
 735  * Find an association for a specific endpoint using the association id
 736  * given out in the COMM_UP notification
 737  */
 738 struct sctp_tcb *
 739 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, caddr_t asoc_id)
 740 {
 741         /*
 742          * Use my the assoc_id to find a endpoint
 743          */
 744         struct sctpasochead *head;
 745         struct sctp_tcb *stcb;
 746         u_int32_t vtag;
 747
 748         if (asoc_id == 0 || inp == NULL) {
 749                 return (NULL);
 750         }
 751         SCTP_INP_INFO_RLOCK();
 752         vtag = (u_int32_t)asoc_id;
 753         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
 754             sctppcbinfo.hashasocmark)];
 755         if (head == NULL) {
 756                 /* invalid vtag */
 757                 SCTP_INP_INFO_RUNLOCK();
 758                 return (NULL);
 759         }
 760         LIST_FOREACH(stcb, head, sctp_asocs) {
 761                 SCTP_INP_RLOCK(stcb->sctp_ep);
 762                 SCTP_TCB_LOCK(stcb);
 763                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 764                 if (stcb->asoc.my_vtag == vtag) {
 765                         /* candidate */
 766                         if (inp != stcb->sctp_ep) {
 767                                 /* some other guy has the
 768                                  * same vtag active (vtag collision).
 769                                  */
 770                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
 771                                 SCTP_TCB_UNLOCK(stcb);
 772                                 continue;
 773                         }
 774                         sctp_pegs[SCTP_VTAG_EXPR]++;
 775                         SCTP_INP_INFO_RUNLOCK();
 776                         return (stcb);
 777                 }
 778                 SCTP_TCB_UNLOCK(stcb);
 779         }
 780         SCTP_INP_INFO_RUNLOCK();
 781         return (NULL);
 782 }
 783
 784 static struct sctp_inpcb *
 785 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 786                     uint16_t lport)
 787 {
 788         struct sctp_inpcb *inp;
 789         struct sockaddr_in *sin;
 790         struct sockaddr_in6 *sin6;
 791         struct sctp_laddr *laddr;
 792
 793         /* Endpoing probe expects
 794          * that the INP_INFO is locked.
 795          */
 796         if (nam->sa_family == AF_INET) {
 797                 sin = (struct sockaddr_in *)nam;
 798                 sin6 = NULL;
 799         } else if (nam->sa_family == AF_INET6) {
 800                 sin6 = (struct sockaddr_in6 *)nam;
 801                 sin = NULL;
 802         } else {
 803                 /* unsupported family */
 804                 return (NULL);
 805         }
 806         if (head == NULL)
 807                 return (NULL);
 808
 809         LIST_FOREACH(inp, head, sctp_hash) {
 810                 SCTP_INP_RLOCK(inp);
 811
 812                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 813                     (inp->sctp_lport == lport)) {
 814                         /* got it */
 815                         if ((nam->sa_family == AF_INET) &&
 816                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 817 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
 818                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
 819 #else
 820 #if defined(__OpenBSD__)
 821                             (0) /* For open bsd we do dual bind only */
 822 #else
 823                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
 824 #endif
 825 #endif
 826                                 ) {
 827                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
 828                                 SCTP_INP_RUNLOCK(inp);
 829                                 continue;
 830                         }
 831                         /* A V6 address and the endpoint is NOT bound V6 */
 832                         if (nam->sa_family == AF_INET6 &&
 833                            (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 834                                 SCTP_INP_RUNLOCK(inp);
 835                                 continue;
 836                         }
 837                         SCTP_INP_RUNLOCK(inp);
 838                         return (inp);
 839                 }
 840                 SCTP_INP_RUNLOCK(inp);
 841         }
 842
 843         if ((nam->sa_family == AF_INET) &&
 844             (sin->sin_addr.s_addr == INADDR_ANY)) {
 845                 /* Can't hunt for one that has no address specified */
 846                 return (NULL);
 847         } else if ((nam->sa_family == AF_INET6) &&
 848                    (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
 849                 /* Can't hunt for one that has no address specified */
 850                 return (NULL);
 851         }
 852         /*
 853          * ok, not bound to all so see if we can find a EP bound to this
 854          * address.
 855          */
 856 #ifdef SCTP_DEBUG
 857         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 858                 printf("Ok, there is NO bound-all available for port:%x\n", ntohs(lport));
 859         }
 860 #endif
 861         LIST_FOREACH(inp, head, sctp_hash) {
 862                 SCTP_INP_RLOCK(inp);
 863                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 864                         SCTP_INP_RUNLOCK(inp);
 865                         continue;
 866                 }
 867                 /*
 868                  * Ok this could be a likely candidate, look at all of
 869                  * its addresses
 870                  */
 871                 if (inp->sctp_lport != lport) {
 872                         SCTP_INP_RUNLOCK(inp);
 873                         continue;
 874                 }
 875 #ifdef SCTP_DEBUG
 876                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 877                         printf("Ok, found maching local port\n");
 878                 }
 879 #endif
 880                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 881                         if (laddr->ifa == NULL) {
 882 #ifdef SCTP_DEBUG
 883                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 884                                         printf("An ounce of prevention is worth a pound of cure\n");
 885                                 }
 886 #endif
 887                                 continue;
 888                         }
 889 #ifdef SCTP_DEBUG
 890                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 891                                 printf("Ok laddr->ifa:%p is possible, ",
 892                                     laddr->ifa);
 893                         }
 894 #endif
 895                         if (laddr->ifa->ifa_addr == NULL) {
 896 #ifdef SCTP_DEBUG
 897                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 898                                         printf("Huh IFA as an ifa_addr=NULL, ");
 899                                 }
 900 #endif
 901                                 continue;
 902                         }
 903 #ifdef SCTP_DEBUG
 904                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 905                                 printf("Ok laddr->ifa:%p is possible, ",
 906                                     laddr->ifa->ifa_addr);
 907                                 sctp_print_address(laddr->ifa->ifa_addr);
 908                                 printf("looking for ");
 909                                 sctp_print_address(nam);
 910                         }
 911 #endif
 912                         if (laddr->ifa->ifa_addr->sa_family == nam->sa_family) {
 913                                 /* possible, see if it matches */
 914                                 struct sockaddr_in *intf_addr;
 915                                 intf_addr = (struct sockaddr_in *)
 916                                     laddr->ifa->ifa_addr;
 917                                 if (nam->sa_family == AF_INET) {
 918                                         if (sin->sin_addr.s_addr ==
 919                                             intf_addr->sin_addr.s_addr) {
 920 #ifdef SCTP_DEBUG
 921                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 922                                                         printf("YES, return ep:%p\n", inp);
 923                                                 }
 924 #endif
 925                                                 SCTP_INP_RUNLOCK(inp);
 926                                                 return (inp);
 927                                         }
 928                                 } else if (nam->sa_family == AF_INET6) {
 929                                         struct sockaddr_in6 *intf_addr6;
 930                                         intf_addr6 = (struct sockaddr_in6 *)
 931                                             laddr->ifa->ifa_addr;
 932                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 933                                             &intf_addr6->sin6_addr)) {
 934 #ifdef SCTP_DEBUG
 935                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 936                                                         printf("YES, return ep:%p\n", inp);
 937                                                 }
 938 #endif
 939                                                 SCTP_INP_RUNLOCK(inp);
 940                                                 return (inp);
 941                                         }
 942                                 }
 943                         }
 944                         SCTP_INP_RUNLOCK(inp);
 945                 }
 946         }
 947 #ifdef SCTP_DEBUG
 948         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 949                 printf("NO, Falls out to NULL\n");
 950         }
 951 #endif
 952         return (NULL);
 953 }
 954
 955
 956 struct sctp_inpcb *
 957 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock)
 958 {
 959         /*
 960          * First we check the hash table to see if someone has this port
 961          * bound with just the port.
 962          */
 963         struct sctp_inpcb *inp;
 964         struct sctppcbhead *head;
 965         struct sockaddr_in *sin;
 966         struct sockaddr_in6 *sin6;
 967         int lport;
 968 #ifdef SCTP_DEBUG
 969         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 970                 printf("Looking for endpoint %d :",
 971                        ntohs(((struct sockaddr_in *)nam)->sin_port));
 972                 sctp_print_address(nam);
 973         }
 974 #endif
 975         if (nam->sa_family == AF_INET) {
 976                 sin = (struct sockaddr_in *)nam;
 977                 lport = ((struct sockaddr_in *)nam)->sin_port;
 978         } else if (nam->sa_family == AF_INET6) {
 979                 sin6 = (struct sockaddr_in6 *)nam;
 980                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
 981         } else {
 982                 /* unsupported family */
 983                 return (NULL);
 984         }
 985         /*
 986          * I could cheat here and just cast to one of the types but we will
 987          * do it right. It also provides the check against an Unsupported
 988          * type too.
 989          */
 990         /* Find the head of the ALLADDR chain */
 991         if (have_lock == 0)
 992                 SCTP_INP_INFO_RLOCK();
 993         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
 994                                                              sctppcbinfo.hashmark)];
 995 #ifdef SCTP_DEBUG
 996         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 997                 printf("Main hash to lookup at head:%p\n", head);
 998         }
 999 #endif
1000         inp = sctp_endpoint_probe(nam, head, lport);
1001
1002         /*
1003          * If the TCP model exists it could be that the main listening
1004          * endpoint is gone but there exists a connected socket for this
1005          * guy yet. If so we can return the first one that we find. This
1006          * may NOT be the correct one but the sctp_findassociation_ep_addr
1007          * has further code to look at all TCP models.
1008          */
1009         if (inp == NULL && find_tcp_pool) {
1010                 unsigned int i;
1011 #ifdef SCTP_DEBUG
1012                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1013                         printf("EP was NULL and TCP model is supported\n");
1014                 }
1015 #endif
1016                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1017                         /*
1018                          * This is real gross, but we do NOT have a remote
1019                          * port at this point depending on who is calling. We
1020                          * must therefore look for ANY one that matches our
1021                          * local port :/
1022                          */
1023                         head = &sctppcbinfo.sctp_tcpephash[i];
1024                         if (LIST_FIRST(head)) {
1025                                 inp = sctp_endpoint_probe(nam, head, lport);
1026                                 if (inp) {
1027                                         /* Found one */
1028                                         break;
1029                                 }
1030                         }
1031                 }
1032         }
1033 #ifdef SCTP_DEBUG
1034         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1035                 printf("EP to return is %p\n", inp);
1036         }
1037 #endif
1038         if (have_lock == 0) {
1039                 if (inp) {
1040                         SCTP_INP_WLOCK(inp);
1041                         SCTP_INP_INCR_REF(inp);
1042                         SCTP_INP_WUNLOCK(inp);
1043                 }
1044                 SCTP_INP_INFO_RUNLOCK();
1045         } else {
1046                 if (inp) {
1047                         SCTP_INP_WLOCK(inp);
1048                         SCTP_INP_INCR_REF(inp);
1049                         SCTP_INP_WUNLOCK(inp);
1050                 }
1051         }
1052         return (inp);
1053 }
1054
1055 /*
1056  * Find an association for an endpoint with the pointer to whom you want
1057  * to send to and the endpoint pointer. The address can be IPv4 or IPv6.
1058  * We may need to change the *to to some other struct like a mbuf...
1059  */
1060 struct sctp_tcb *
1061 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1062     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
1063 {
1064         struct sctp_inpcb *inp;
1065         struct sctp_tcb *retval;
1066
1067         SCTP_INP_INFO_RLOCK();
1068         if (find_tcp_pool) {
1069                 if (inp_p != NULL) {
1070                         retval = sctp_tcb_special_locate(inp_p, from, to, netp);
1071                 } else {
1072                         retval = sctp_tcb_special_locate(&inp, from, to, netp);
1073                 }
1074                 if (retval != NULL) {
1075                         SCTP_INP_INFO_RUNLOCK();
1076                         return (retval);
1077                 }
1078         }
1079         inp = sctp_pcb_findep(to, 0, 1);
1080         if (inp_p != NULL) {
1081                 *inp_p = inp;
1082         }
1083         SCTP_INP_INFO_RUNLOCK();
1084
1085         if (inp == NULL) {
1086                 return (NULL);
1087         }
1088
1089         /*
1090          * ok, we have an endpoint, now lets find the assoc for it (if any)
1091          * we now place the source address or from in the to of the find
1092          * endpoint call. Since in reality this chain is used from the
1093          * inbound packet side.
1094          */
1095         if (inp_p != NULL) {
1096                 return (sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL));
1097         } else {
1098                 return (sctp_findassociation_ep_addr(&inp, from, netp, to, NULL));
1099         }
1100 }
1101
1102
1103 /*
1104  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1105  * find all addresses that the sender has specified in any address list.
1106  * Each address will be used to lookup the TCB and see if one exits.
1107  */
1108 static struct sctp_tcb *
1109 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1110     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1111     struct sockaddr *dest)
1112 {
1113         struct sockaddr_in sin4;
1114         struct sockaddr_in6 sin6;
1115         struct sctp_paramhdr *phdr, parm_buf;
1116         struct sctp_tcb *retval;
1117         u_int32_t ptype, plen;
1118
1119         memset(&sin4, 0, sizeof(sin4));
1120         memset(&sin6, 0, sizeof(sin6));
1121         sin4.sin_len = sizeof(sin4);
1122         sin4.sin_family = AF_INET;
1123         sin4.sin_port = sh->src_port;
1124         sin6.sin6_len = sizeof(sin6);
1125         sin6.sin6_family = AF_INET6;
1126         sin6.sin6_port = sh->src_port;
1127
1128         retval = NULL;
1129         offset += sizeof(struct sctp_init_chunk);
1130
1131         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1132         while (phdr != NULL) {
1133                 /* now we must see if we want the parameter */
1134                 ptype = ntohs(phdr->param_type);
1135                 plen = ntohs(phdr->param_length);
1136                 if (plen == 0) {
1137 #ifdef SCTP_DEBUG
1138                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1139                                 printf("sctp_findassociation_special_addr: Impossible length in parameter\n");
1140                         }
1141 #endif /* SCTP_DEBUG */
1142                         break;
1143                 }
1144                 if (ptype == SCTP_IPV4_ADDRESS &&
1145                     plen == sizeof(struct sctp_ipv4addr_param)) {
1146                         /* Get the rest of the address */
1147                         struct sctp_ipv4addr_param ip4_parm, *p4;
1148
1149                         phdr = sctp_get_next_param(m, offset,
1150                             (struct sctp_paramhdr *)&ip4_parm, plen);
1151                         if (phdr == NULL) {
1152                                 return (NULL);
1153                         }
1154                         p4 = (struct sctp_ipv4addr_param *)phdr;
1155                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1156                         /* look it up */
1157                         retval = sctp_findassociation_ep_addr(inp_p,
1158                             (struct sockaddr *)&sin4, netp, dest, NULL);
1159                         if (retval != NULL) {
1160                                 return (retval);
1161                         }
1162                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1163                     plen == sizeof(struct sctp_ipv6addr_param)) {
1164                         /* Get the rest of the address */
1165                         struct sctp_ipv6addr_param ip6_parm, *p6;
1166
1167                         phdr = sctp_get_next_param(m, offset,
1168                             (struct sctp_paramhdr *)&ip6_parm, plen);
1169                         if (phdr == NULL) {
1170                                 return (NULL);
1171                         }
1172                         p6 = (struct sctp_ipv6addr_param *)phdr;
1173                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1174                         /* look it up */
1175                         retval = sctp_findassociation_ep_addr(inp_p,
1176                             (struct sockaddr *)&sin6, netp, dest, NULL);
1177                         if (retval != NULL) {
1178                                 return (retval);
1179                         }
1180                 }
1181                 offset += SCTP_SIZE32(plen);
1182                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1183                     sizeof(parm_buf));
1184         }
1185         return (NULL);
1186 }
1187
1188 static struct sctp_tcb *
1189 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1190     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1191     uint16_t lport)
1192 {
1193         /*
1194          * Use my vtag to hash. If we find it we then verify the source addr
1195          * is in the assoc. If all goes well we save a bit on rec of a packet.
1196          */
1197         struct sctpasochead *head;
1198         struct sctp_nets *net;
1199         struct sctp_tcb *stcb;
1200
1201         SCTP_INP_INFO_RLOCK();
1202         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1203             sctppcbinfo.hashasocmark)];
1204         if (head == NULL) {
1205                 /* invalid vtag */
1206                 SCTP_INP_INFO_RUNLOCK();
1207                 return (NULL);
1208         }
1209         LIST_FOREACH(stcb, head, sctp_asocs) {
1210                 SCTP_INP_RLOCK(stcb->sctp_ep);
1211                 SCTP_TCB_LOCK(stcb);
1212                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1213                 if (stcb->asoc.my_vtag == vtag) {
1214                         /* candidate */
1215                         if (stcb->rport != rport) {
1216                                 /*
1217                                  * we could remove this if vtags are unique
1218                                  * across the system.
1219                                  */
1220                                 SCTP_TCB_UNLOCK(stcb);
1221                                 continue;
1222                         }
1223                         if (stcb->sctp_ep->sctp_lport != lport) {
1224                                 /*
1225                                  * we could remove this if vtags are unique
1226                                  * across the system.
1227                                  */
1228                                 SCTP_TCB_UNLOCK(stcb);
1229                                 continue;
1230                         }
1231                         net = sctp_findnet(stcb, from);
1232                         if (net) {
1233                                 /* yep its him. */
1234                                 *netp = net;
1235                                 sctp_pegs[SCTP_VTAG_EXPR]++;
1236                                 *inp_p = stcb->sctp_ep;
1237                                 SCTP_INP_INFO_RUNLOCK();
1238                                 return (stcb);
1239                         } else {
1240                                 /* not him, this should only
1241                                  * happen in rare cases so
1242                                  * I peg it.
1243                                  */
1244                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
1245                         }
1246                 }
1247                 SCTP_TCB_UNLOCK(stcb);
1248         }
1249         SCTP_INP_INFO_RUNLOCK();
1250         return (NULL);
1251 }
1252
1253 /*
1254  * Find an association with the pointer to the inbound IP packet. This
1255  * can be a IPv4 or IPv6 packet.
1256  */
1257 struct sctp_tcb *
1258 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1259     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1260     struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1261 {
1262         int find_tcp_pool;
1263         struct ip *iph;
1264         struct sctp_tcb *retval;
1265         struct sockaddr_storage to_store, from_store;
1266         struct sockaddr *to = (struct sockaddr *)&to_store;
1267         struct sockaddr *from = (struct sockaddr *)&from_store;
1268         struct sctp_inpcb *inp;
1269
1270
1271         iph = mtod(m, struct ip *);
1272         if (iph->ip_v == IPVERSION) {
1273                 /* its IPv4 */
1274                 struct sockaddr_in *to4, *from4;
1275
1276                 to4 = (struct sockaddr_in *)&to_store;
1277                 from4 = (struct sockaddr_in *)&from_store;
1278                 bzero(to4, sizeof(*to4));
1279                 bzero(from4, sizeof(*from4));
1280                 from4->sin_family = to4->sin_family = AF_INET;
1281                 from4->sin_len = to4->sin_len = sizeof(struct sockaddr_in);
1282                 from4->sin_addr.s_addr  = iph->ip_src.s_addr;
1283                 to4->sin_addr.s_addr = iph->ip_dst.s_addr ;
1284                 from4->sin_port = sh->src_port;
1285                 to4->sin_port = sh->dest_port;
1286         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1287                 /* its IPv6 */
1288                 struct ip6_hdr *ip6;
1289                 struct sockaddr_in6 *to6, *from6;
1290
1291                 ip6 = mtod(m, struct ip6_hdr *);
1292                 to6 = (struct sockaddr_in6 *)&to_store;
1293                 from6 = (struct sockaddr_in6 *)&from_store;
1294                 bzero(to6, sizeof(*to6));
1295                 bzero(from6, sizeof(*from6));
1296                 from6->sin6_family = to6->sin6_family = AF_INET6;
1297                 from6->sin6_len = to6->sin6_len = sizeof(struct sockaddr_in6);
1298                 to6->sin6_addr = ip6->ip6_dst;
1299                 from6->sin6_addr = ip6->ip6_src;
1300                 from6->sin6_port = sh->src_port;
1301                 to6->sin6_port = sh->dest_port;
1302                 /* Get the scopes in properly to the sin6 addr's */
1303                 (void)in6_recoverscope(to6, &to6->sin6_addr, NULL);
1304 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1305                 (void)in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
1306 #else
1307                 (void)in6_embedscope(&to6->sin6_addr, to6);
1308 #endif
1309
1310                 (void)in6_recoverscope(from6, &from6->sin6_addr, NULL);
1311 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1312                 (void)in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
1313 #else
1314                 (void)in6_embedscope(&from6->sin6_addr, from6);
1315 #endif
1316         } else {
1317                 /* Currently not supported. */
1318                 return (NULL);
1319         }
1320 #ifdef SCTP_DEBUG
1321         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1322                 printf("Looking for port %d address :",
1323                        ntohs(((struct sockaddr_in *)to)->sin_port));
1324                 sctp_print_address(to);
1325                 printf("From for port %d address :",
1326                        ntohs(((struct sockaddr_in *)from)->sin_port));
1327                 sctp_print_address(from);
1328         }
1329 #endif
1330
1331         if (sh->v_tag) {
1332                 /* we only go down this path if vtag is non-zero */
1333                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1334                     inp_p, netp, sh->src_port, sh->dest_port);
1335                 if (retval) {
1336                         return (retval);
1337                 }
1338         }
1339         find_tcp_pool = 0;
1340         if ((ch->chunk_type != SCTP_INITIATION) &&
1341             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1342             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1343             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1344                 /* Other chunk types go to the tcp pool. */
1345                 find_tcp_pool = 1;
1346         }
1347         if (inp_p) {
1348                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1349                     find_tcp_pool);
1350                 inp = *inp_p;
1351         } else {
1352                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1353                     find_tcp_pool);
1354         }
1355 #ifdef SCTP_DEBUG
1356         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1357                 printf("retval:%p inp:%p\n", retval, inp);
1358         }
1359 #endif
1360         if (retval == NULL && inp) {
1361                 /* Found a EP but not this address */
1362 #ifdef SCTP_DEBUG
1363                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1364                         printf("Found endpoint %p but no asoc - ep state:%x\n",
1365                             inp, inp->sctp_flags);
1366                 }
1367 #endif
1368                 if ((ch->chunk_type == SCTP_INITIATION) ||
1369                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1370                         /*
1371                          * special hook, we do NOT return linp or an
1372                          * association that is linked to an existing
1373                          * association that is under the TCP pool (i.e. no
1374                          * listener exists). The endpoint finding routine
1375                          * will always find a listner before examining the
1376                          * TCP pool.
1377                          */
1378                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1379 #ifdef SCTP_DEBUG
1380                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1381                                         printf("Gak, its in the TCP pool... return NULL");
1382                                 }
1383 #endif
1384                                 if (inp_p) {
1385                                         *inp_p = NULL;
1386                                 }
1387                                 return (NULL);
1388                         }
1389 #ifdef SCTP_DEBUG
1390                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1391                                 printf("Now doing SPECIAL find\n");
1392                         }
1393 #endif
1394                         retval = sctp_findassociation_special_addr(m, iphlen,
1395                             offset, sh, inp_p, netp, to);
1396                 }
1397         }
1398 #ifdef SCTP_DEBUG
1399         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1400             printf("retval is %p\n", retval);
1401         }
1402 #endif
1403         return (retval);
1404 }
1405
1406 extern int sctp_max_burst_default;
1407
1408 extern unsigned int sctp_delayed_sack_time_default;
1409 extern unsigned int sctp_heartbeat_interval_default;
1410 extern unsigned int sctp_pmtu_raise_time_default;
1411 extern unsigned int sctp_shutdown_guard_time_default;
1412 extern unsigned int sctp_secret_lifetime_default;
1413
1414 extern unsigned int sctp_rto_max_default;
1415 extern unsigned int sctp_rto_min_default;
1416 extern unsigned int sctp_rto_initial_default;
1417 extern unsigned int sctp_init_rto_max_default;
1418 extern unsigned int sctp_valid_cookie_life_default;
1419 extern unsigned int sctp_init_rtx_max_default;
1420 extern unsigned int sctp_assoc_rtx_max_default;
1421 extern unsigned int sctp_path_rtx_max_default;
1422 extern unsigned int sctp_nr_outgoing_streams_default;
1423
1424 /*
1425  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1426  * addresses. This way if we don't get a bind we by default pick a ephemeral
1427  * port with all addresses bound.
1428  */
1429 int
1430 sctp_inpcb_alloc(struct socket *so)
1431 {
1432         /*
1433          * we get called when a new endpoint starts up. We need to allocate
1434          * the sctp_inpcb structure from the zone and init it. Mark it as
1435          * unbound and find a port that we can use as an ephemeral with
1436          * INADDR_ANY. If the user binds later no problem we can then add
1437          * in the specific addresses. And setup the default parameters for
1438          * the EP.
1439          */
1440         int i, error;
1441         struct sctp_inpcb *inp, *n_inp;
1442         struct sctp_pcb *m;
1443         struct timeval time;
1444
1445         error = 0;
1446
1447         /* Hack alert:
1448          *
1449          * This code audits the entire INP list to see if
1450          * any ep's that are in the GONE state are now
1451          * all free. This should not happen really since when
1452          * the last association if freed we should end up deleting
1453          * the inpcb. This code including the locks should
1454          * be taken out ... since the last set of fixes I
1455          * have not seen the "Found a GONE on list" has not
1456          * came out. But i am paranoid and we will leave this
1457          * in at the cost of efficency on allocation of PCB's.
1458          * Probably we should move this to the invariant
1459          * compile options
1460          */
1461 /* #ifdef INVARIANTS*/
1462         SCTP_INP_INFO_RLOCK();
1463         inp = LIST_FIRST(&sctppcbinfo.listhead);
1464         while (inp) {
1465                 n_inp = LIST_NEXT(inp, sctp_list);
1466                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1467                         if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
1468                                 /* finish the job now */
1469                                 printf("Found a GONE on list\n");
1470                                 SCTP_INP_INFO_RUNLOCK();
1471                                 sctp_inpcb_free(inp, 1);
1472                                 SCTP_INP_INFO_RLOCK();
1473                         }
1474                 }
1475                 inp = n_inp;
1476         }
1477         SCTP_INP_INFO_RUNLOCK();
1478 /* #endif INVARIANTS*/
1479
1480         SCTP_INP_INFO_WLOCK();
1481         inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
1482         if (inp == NULL) {
1483                 printf("Out of SCTP-INPCB structures - no resources\n");
1484                 SCTP_INP_INFO_WUNLOCK();
1485                 return (ENOBUFS);
1486         }
1487
1488         /* zap it */
1489         bzero(inp, sizeof(*inp));
1490
1491         /* bump generations */
1492         inp->ip_inp.inp.inp_socket = so;
1493
1494         /* setup socket pointers */
1495         inp->sctp_socket = so;
1496
1497         /* setup inpcb socket too */
1498         inp->ip_inp.inp.inp_socket = so;
1499         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1500 #ifdef IPSEC
1501 #if !(defined(__OpenBSD__) || defined(__APPLE__))
1502         {
1503                 struct inpcbpolicy *pcb_sp = NULL;
1504                 error = ipsec_init_pcbpolicy(so, &pcb_sp);
1505                 /* Arrange to share the policy */
1506                 inp->ip_inp.inp.inp_sp = pcb_sp;
1507                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1508         }
1509 #else
1510         /* not sure what to do for openbsd here */
1511         error = 0;
1512 #endif
1513         if (error != 0) {
1514                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1515                 SCTP_INP_INFO_WUNLOCK();
1516                 return error;
1517         }
1518 #endif /* IPSEC */
1519         sctppcbinfo.ipi_count_ep++;
1520 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1521         inp->ip_inp.inp.inp_gencnt = ++sctppcbinfo.ipi_gencnt_ep;
1522         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1523 #else
1524         inp->inp_ip_ttl = ip_defttl;
1525         inp->inp_ip_tos = 0;
1526 #endif
1527
1528         so->so_pcb = (caddr_t)inp;
1529
1530         if ((so->so_type == SOCK_DGRAM) ||
1531             (so->so_type == SOCK_SEQPACKET)) {
1532                 /* UDP style socket */
1533                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1534                     SCTP_PCB_FLAGS_UNBOUND);
1535                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1536                 /* Be sure it is NON-BLOCKING IO for UDP */
1537                 /*so->so_state |= SS_NBIO;*/
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                 /* Be sure we have blocking IO bu default */
1544                 so->so_state &= ~SS_NBIO;
1545         } else {
1546                 /*
1547                  * unsupported socket type (RAW, etc)- in case we missed
1548                  * it in protosw
1549                  */
1550                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1551                 SCTP_INP_INFO_WUNLOCK();
1552                 return (EOPNOTSUPP);
1553         }
1554         inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1555 #ifdef __NetBSD__
1556             HASH_LIST,
1557 #endif
1558             M_PCB,
1559 #if defined(__NetBSD__) || defined(__OpenBSD__)
1560             M_WAITOK,
1561 #endif
1562             &inp->sctp_hashmark);
1563         if (inp->sctp_tcbhash == NULL) {
1564                 printf("Out of SCTP-INPCB->hashinit - no resources\n");
1565                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1566                 SCTP_INP_INFO_WUNLOCK();
1567                 return (ENOBUFS);
1568         }
1569         /* LOCK init's */
1570         SCTP_INP_LOCK_INIT(inp);
1571         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1572         /* lock the new ep */
1573         SCTP_INP_WLOCK(inp);
1574
1575         /* add it to the info area */
1576         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1577         SCTP_INP_INFO_WUNLOCK();
1578
1579         LIST_INIT(&inp->sctp_addr_list);
1580         LIST_INIT(&inp->sctp_asoc_list);
1581         TAILQ_INIT(&inp->sctp_queue_list);
1582         /* Init the timer structure for signature change */
1583 #if defined (__FreeBSD__) && __FreeBSD_version >= 500000
1584         callout_init(&inp->sctp_ep.signature_change.timer, 0);
1585 #else
1586         callout_init(&inp->sctp_ep.signature_change.timer);
1587 #endif
1588         printf("signature_change.timer has been initiated!\n");
1589         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1590
1591         /* now init the actual endpoint default data */
1592         m = &inp->sctp_ep;
1593
1594         /* setup the base timeout information */
1595         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1596         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1597         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1598         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
1599         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1600         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1601         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1602         /* all max/min max are in ms */
1603         m->sctp_maxrto = sctp_rto_max_default;
1604         m->sctp_minrto = sctp_rto_min_default;
1605         m->initial_rto = sctp_rto_initial_default;
1606         m->initial_init_rto_max = sctp_init_rto_max_default;
1607
1608         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1609
1610         m->max_init_times = sctp_init_rtx_max_default;
1611         m->max_send_times = sctp_assoc_rtx_max_default;
1612         m->def_net_failure = sctp_path_rtx_max_default;
1613         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1614         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1615         m->max_burst = sctp_max_burst_default;
1616         /* number of streams to pre-open on a association */
1617         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1618
1619         /* Add adaption cookie */
1620         m->adaption_layer_indicator = 0x504C5253;
1621
1622         /* seed random number generator */
1623         m->random_counter = 1;
1624         m->store_at = SCTP_SIGNATURE_SIZE;
1625 #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
1626         read_random_unlimited(m->random_numbers, sizeof(m->random_numbers));
1627 #elif defined(__APPLE__) || (__FreeBSD_version > 500000)
1628         read_random(m->random_numbers, sizeof(m->random_numbers));
1629 #elif defined(__OpenBSD__)
1630         get_random_bytes(m->random_numbers, sizeof(m->random_numbers));
1631 #elif defined(__NetBSD__) && NRND > 0
1632         rnd_extract_data(m->random_numbers, sizeof(m->random_numbers),
1633                          RND_EXTRACT_ANY);
1634 #else
1635         {
1636                 u_int32_t *ranm, *ranp;
1637                 ranp = (u_int32_t *)&m->random_numbers;
1638                 ranm = ranp + (SCTP_SIGNATURE_ALOC_SIZE/sizeof(u_int32_t));
1639                 if ((u_long)ranp % 4) {
1640                         /* not a even boundary? */
1641                         ranp = (u_int32_t *)SCTP_SIZE32((u_long)ranp);
1642                 }
1643                 while (ranp < ranm) {
1644                         *ranp = random();
1645                         ranp++;
1646                 }
1647         }
1648 #endif
1649         sctp_fill_random_store(m);
1650
1651         /* Minimum cookie size */
1652         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1653                 sizeof(struct sctp_state_cookie);
1654         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1655
1656         /* Setup the initial secret */
1657         SCTP_GETTIME_TIMEVAL(&time);
1658         m->time_of_secret_change = time.tv_sec;
1659
1660         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1661                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1662         }
1663         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1664
1665         /* How long is a cookie good for ? */
1666         m->def_cookie_life = sctp_valid_cookie_life_default;
1667         SCTP_INP_WUNLOCK(inp);
1668         return (error);
1669 }
1670
1671
1672 void
1673 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1674     struct sctp_tcb *stcb)
1675 {
1676         uint16_t lport, rport;
1677         struct sctppcbhead *head;
1678         struct sctp_laddr *laddr, *oladdr;
1679
1680         SCTP_TCB_UNLOCK(stcb);
1681         SCTP_INP_INFO_WLOCK();
1682         SCTP_INP_WLOCK(old_inp);
1683         SCTP_INP_WLOCK(new_inp);
1684         SCTP_TCB_LOCK(stcb);
1685
1686         new_inp->sctp_ep.time_of_secret_change =
1687             old_inp->sctp_ep.time_of_secret_change;
1688         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1689             sizeof(old_inp->sctp_ep.secret_key));
1690         new_inp->sctp_ep.current_secret_number =
1691             old_inp->sctp_ep.current_secret_number;
1692         new_inp->sctp_ep.last_secret_number =
1693             old_inp->sctp_ep.last_secret_number;
1694         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1695
1696         /* Copy the port across */
1697         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1698         rport = stcb->rport;
1699         /* Pull the tcb from the old association */
1700         LIST_REMOVE(stcb, sctp_tcbhash);
1701         LIST_REMOVE(stcb, sctp_tcblist);
1702
1703         /* Now insert the new_inp into the TCP connected hash */
1704         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1705             sctppcbinfo.hashtcpmark)];
1706
1707         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1708
1709         /* Now move the tcb into the endpoint list */
1710         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1711         /*
1712          * Question, do we even need to worry about the ep-hash since
1713          * we only have one connection? Probably not :> so lets
1714          * get rid of it and not suck up any kernel memory in that.
1715          */
1716         SCTP_INP_INFO_WUNLOCK();
1717         stcb->sctp_socket = new_inp->sctp_socket;
1718         stcb->sctp_ep = new_inp;
1719         if (new_inp->sctp_tcbhash != NULL) {
1720                 FREE(new_inp->sctp_tcbhash, M_PCB);
1721                 new_inp->sctp_tcbhash = NULL;
1722         }
1723         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1724                 /* Subset bound, so copy in the laddr list from the old_inp */
1725                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1726                         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
1727                             sctppcbinfo.ipi_zone_laddr);
1728                         if (laddr == NULL) {
1729                                 /*
1730                                  * Gak, what can we do? This assoc is really
1731                                  * HOSED. We probably should send an abort
1732                                  * here.
1733                                  */
1734 #ifdef SCTP_DEBUG
1735                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1736                                         printf("Association hosed in TCP model, out of laddr memory\n");
1737                                 }
1738 #endif /* SCTP_DEBUG */
1739                                 continue;
1740                         }
1741                         sctppcbinfo.ipi_count_laddr++;
1742                         sctppcbinfo.ipi_gencnt_laddr++;
1743                         bzero(laddr, sizeof(*laddr));
1744                         laddr->ifa = oladdr->ifa;
1745                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1746                             sctp_nxt_addr);
1747                         new_inp->laddr_count++;
1748                 }
1749         }
1750         SCTP_INP_WUNLOCK(new_inp);
1751         SCTP_INP_WUNLOCK(old_inp);
1752 }
1753
1754 static int
1755 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
1756 {
1757         struct sctppcbhead *head;
1758         struct sctp_inpcb *t_inp;
1759
1760         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1761             sctppcbinfo.hashmark)];
1762         LIST_FOREACH(t_inp, head, sctp_hash) {
1763                 if (t_inp->sctp_lport != lport) {
1764                         continue;
1765                 }
1766                 /* This one is in use. */
1767                 /* check the v6/v4 binding issue */
1768                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1769 #if defined(__FreeBSD__)
1770                     (((struct inpcb *)t_inp)->inp_flags & IN6P_IPV6_V6ONLY)
1771 #else
1772 #if defined(__OpenBSD__)
1773                     (0) /* For open bsd we do dual bind only */
1774 #else
1775                     (((struct in6pcb *)t_inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1776 #endif
1777 #endif
1778                         ) {
1779                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1780                                 /* collision in V6 space */
1781                                 return (1);
1782                         } else {
1783                                 /* inp is BOUND_V4 no conflict */
1784                                 continue;
1785                         }
1786                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1787                         /* t_inp is bound v4 and v6, conflict always */
1788                         return (1);
1789                 } else {
1790                         /* t_inp is bound only V4 */
1791                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1792 #if defined(__FreeBSD__)
1793                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
1794 #else
1795 #if defined(__OpenBSD__)
1796                             (0) /* For open bsd we do dual bind only */
1797 #else
1798                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1799 #endif
1800 #endif
1801                                 ) {
1802                                 /* no conflict */
1803                                 continue;
1804                         }
1805                         /* else fall through to conflict */
1806                 }
1807                 return (1);
1808         }
1809         return (0);
1810 }
1811
1812 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
1813 /*
1814  * Don't know why, but without this there is an unknown reference when
1815  * compiling NetBSD... hmm
1816  */
1817 extern void in6_sin6_2_sin (struct sockaddr_in *, struct sockaddr_in6 *sin6);
1818 #endif
1819
1820
1821 int
1822 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
1823 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1824 #else
1825 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct proc *p)
1826 #endif
1827 {
1828         /* bind a ep to a socket address */
1829         struct sctppcbhead *head;
1830         struct sctp_inpcb *inp, *inp_tmp;
1831         struct inpcb *ip_inp;
1832         int bindall;
1833         uint16_t lport;
1834         int error;
1835
1836         lport = 0;
1837         error = 0;
1838         bindall = 1;
1839         inp = (struct sctp_inpcb *)so->so_pcb;
1840         ip_inp = (struct inpcb *)so->so_pcb;
1841 #ifdef SCTP_DEBUG
1842         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1843                 if (addr) {
1844                         printf("Bind called port:%d\n",
1845                                ntohs(((struct sockaddr_in *)addr)->sin_port));
1846                         printf("Addr :");
1847                         sctp_print_address(addr);
1848                 }
1849         }
1850 #endif /* SCTP_DEBUG */
1851         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1852                 /* already did a bind, subsequent binds NOT allowed ! */
1853                 return (EINVAL);
1854         }
1855
1856         if (addr != NULL) {
1857                 if (addr->sa_family == AF_INET) {
1858                         struct sockaddr_in *sin;
1859
1860                         /* IPV6_V6ONLY socket? */
1861                         if (
1862 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1863                                 (ip_inp->inp_flags & IN6P_IPV6_V6ONLY)
1864 #else
1865 #if defined(__OpenBSD__)
1866                                 (0)     /* For openbsd we do dual bind only */
1867 #else
1868                                 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1869 #endif
1870 #endif
1871                                 ) {
1872                                 return (EINVAL);
1873                         }
1874
1875                         if (addr->sa_len != sizeof(*sin))
1876                                 return (EINVAL);
1877
1878                         sin = (struct sockaddr_in *)addr;
1879                         lport = sin->sin_port;
1880
1881                         if (sin->sin_addr.s_addr != INADDR_ANY) {
1882                                 bindall = 0;
1883                         }
1884                 } else if (addr->sa_family == AF_INET6) {
1885                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
1886                         struct sockaddr_in6 *sin6;
1887
1888                         sin6 = (struct sockaddr_in6 *)addr;
1889
1890                         if (addr->sa_len != sizeof(*sin6))
1891                                 return (EINVAL);
1892
1893                         lport = sin6->sin6_port;
1894                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1895                                 bindall = 0;
1896                                 /* KAME hack: embed scopeid */
1897 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1898                                 if (in6_embedscope(&sin6->sin6_addr, sin6,
1899                                     ip_inp, NULL) != 0)
1900                                         return (EINVAL);
1901 #elif defined(__FreeBSD__)
1902                                 error = scope6_check_id(sin6, ip6_use_defzone);
1903                                 if (error != 0)
1904                                         return (error);
1905 #else
1906                                 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
1907                                         return (EINVAL);
1908                                 }
1909 #endif
1910                         }
1911 #ifndef SCOPEDROUTING
1912                         /* this must be cleared for ifa_ifwithaddr() */
1913                         sin6->sin6_scope_id = 0;
1914 #endif /* SCOPEDROUTING */
1915                 } else {
1916                         return (EAFNOSUPPORT);
1917                 }
1918         }
1919         SCTP_INP_INFO_WLOCK();
1920         SCTP_INP_WLOCK(inp);
1921         /* increase our count due to the unlock we do */
1922         SCTP_INP_INCR_REF(inp);
1923         if (lport) {
1924                 /*
1925                  * Did the caller specify a port? if so we must see if a
1926                  * ep already has this one bound.
1927                  */
1928                 /* got to be root to get at low ports */
1929                 if (ntohs(lport) < IPPORT_RESERVED) {
1930                         if (p && (error =
1931 #ifdef __FreeBSD__
1932 #if __FreeBSD_version >= 500000
1933                             suser_cred(p->td_ucred, 0)
1934 #else
1935                             suser(p)
1936 #endif
1937 #elif defined(__NetBSD__) || defined(__APPLE__)
1938                             suser(p->p_ucred, &p->p_acflag)
1939 #else
1940                             suser(p, 0)
1941 #endif
1942                             )) {
1943                                 SCTP_INP_DECR_REF(inp);
1944                                 SCTP_INP_WUNLOCK(inp);
1945                                 SCTP_INP_INFO_WUNLOCK();
1946                                 return (error);
1947                         }
1948                 }
1949                 if (p == NULL) {
1950                         SCTP_INP_DECR_REF(inp);
1951                         SCTP_INP_WUNLOCK(inp);
1952                         SCTP_INP_INFO_WUNLOCK();
1953                         return (error);
1954                 }
1955                 SCTP_INP_WUNLOCK(inp);
1956                 inp_tmp = sctp_pcb_findep(addr, 0, 1);
1957                 if (inp_tmp != NULL) {
1958                         /* lock guy returned and lower count
1959                          * note that we are not bound so inp_tmp
1960                          * should NEVER be inp. And it is this
1961                          * inp (inp_tmp) that gets the reference
1962                          * bump, so we must lower it.
1963                          */
1964                         SCTP_INP_WLOCK(inp_tmp);
1965                         SCTP_INP_DECR_REF(inp_tmp);
1966                         SCTP_INP_WUNLOCK(inp_tmp);
1967
1968                         /* unlock info */
1969                         SCTP_INP_INFO_WUNLOCK();
1970                         return (EADDRNOTAVAIL);
1971                 }
1972                 SCTP_INP_WLOCK(inp);
1973                 if (bindall) {
1974                         /* verify that no lport is not used by a singleton */
1975                         if (sctp_isport_inuse(inp, lport)) {
1976                                 /* Sorry someone already has this one bound */
1977                                 SCTP_INP_DECR_REF(inp);
1978                                 SCTP_INP_WUNLOCK(inp);
1979                                 SCTP_INP_INFO_WUNLOCK();
1980                                 return (EADDRNOTAVAIL);
1981                         }
1982                 }
1983         } else {
1984                 /*
1985                  * get any port but lets make sure no one has any address
1986                  * with this port bound
1987                  */
1988
1989                 /*
1990                  * setup the inp to the top (I could use the union but this
1991                  * is just as easy
1992                  */
1993                 uint32_t port_guess;
1994                 uint16_t port_attempt;
1995                 int not_done=1;
1996
1997                 while (not_done) {
1998                         port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
1999                         port_attempt = (port_guess &  0x0000ffff);
2000                         if (port_attempt == 0) {
2001                                 goto next_half;
2002                         }
2003                         if (port_attempt < IPPORT_RESERVED) {
2004                                 port_attempt += IPPORT_RESERVED;
2005                         }
2006
2007                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2008                                 /* got a port we can use */
2009                                 not_done = 0;
2010                                 continue;
2011                         }
2012                         /* try upper half */
2013                 next_half:
2014                         port_attempt = ((port_guess >> 16) &  0x0000ffff);
2015                         if (port_attempt == 0) {
2016                                 goto last_try;
2017                         }
2018                         if (port_attempt < IPPORT_RESERVED) {
2019                                 port_attempt += IPPORT_RESERVED;
2020                         }
2021                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2022                                 /* got a port we can use */
2023                                 not_done = 0;
2024                                 continue;
2025                         }
2026                         /* try two half's added together */
2027                 last_try:
2028                         port_attempt = (((port_guess >> 16) &  0x0000ffff) + (port_guess & 0x0000ffff));
2029                         if (port_attempt == 0) {
2030                                 /* get a new random number */
2031                                 continue;
2032                         }
2033                         if (port_attempt < IPPORT_RESERVED) {
2034                                 port_attempt += IPPORT_RESERVED;
2035                         }
2036                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2037                                 /* got a port we can use */
2038                                 not_done = 0;
2039                                 continue;
2040                         }
2041                 }
2042                 /* we don't get out of the loop until we have a port */
2043                 lport = htons(port_attempt);
2044         }
2045         SCTP_INP_DECR_REF(inp);
2046         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2047                 /* this really should not happen. The guy
2048                  * did a non-blocking bind and then did a close
2049                  * at the same time.
2050                  */
2051                 SCTP_INP_WUNLOCK(inp);
2052                 SCTP_INP_INFO_WUNLOCK();
2053                 return (EINVAL);
2054         }
2055         /* ok we look clear to give out this port, so lets setup the binding */
2056         if (bindall) {
2057                 /* binding to all addresses, so just set in the proper flags */
2058                 inp->sctp_flags |= (SCTP_PCB_FLAGS_BOUNDALL |
2059                     SCTP_PCB_FLAGS_DO_ASCONF);
2060                 /* set the automatic addr changes from kernel flag */
2061                 if (sctp_auto_asconf == 0) {
2062                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2063                 } else {
2064                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2065                 }
2066         } else {
2067                 /*
2068                  * bind specific, make sure flags is off and add a new address
2069                  * structure to the sctp_addr_list inside the ep structure.
2070                  *
2071                  * We will need to allocate one and insert it at the head.
2072                  * The socketopt call can just insert new addresses in there
2073                  * as well. It will also have to do the embed scope kame hack
2074                  * too (before adding).
2075                  */
2076                 struct ifaddr *ifa;
2077                 struct sockaddr_storage store_sa;
2078
2079                 memset(&store_sa, 0, sizeof(store_sa));
2080                 if (addr->sa_family == AF_INET) {
2081                         struct sockaddr_in *sin;
2082
2083                         sin = (struct sockaddr_in *)&store_sa;
2084                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2085                         sin->sin_port = 0;
2086                 } else if (addr->sa_family == AF_INET6) {
2087                         struct sockaddr_in6 *sin6;
2088
2089                         sin6 = (struct sockaddr_in6 *)&store_sa;
2090                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2091                         sin6->sin6_port = 0;
2092                 }
2093                 /*
2094                  * first find the interface with the bound address
2095                  * need to zero out the port to find the address! yuck!
2096                  * can't do this earlier since need port for sctp_pcb_findep()
2097                  */
2098                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
2099                 if (ifa == NULL) {
2100                         /* Can't find an interface with that address */
2101                         SCTP_INP_WUNLOCK(inp);
2102                         SCTP_INP_INFO_WUNLOCK();
2103                         return (EADDRNOTAVAIL);
2104                 }
2105                 if (addr->sa_family == AF_INET6) {
2106                         struct in6_ifaddr *ifa6;
2107                         ifa6 = (struct in6_ifaddr *)ifa;
2108                         /*
2109                          * allow binding of deprecated addresses as per
2110                          * RFC 2462 and ipng discussion
2111                          */
2112                         if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2113                             IN6_IFF_ANYCAST |
2114                             IN6_IFF_NOTREADY)) {
2115                                 /* Can't bind a non-existent addr. */
2116                                 SCTP_INP_WUNLOCK(inp);
2117                                 SCTP_INP_INFO_WUNLOCK();
2118                                 return (EINVAL);
2119                         }
2120                 }
2121                 /* we're not bound all */
2122                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2123 #if 0 /* use sysctl now */
2124                 /* don't allow automatic addr changes from kernel */
2125                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2126 #endif
2127                 /* set the automatic addr changes from kernel flag */
2128                 if (sctp_auto_asconf == 0) {
2129                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2130                 } else {
2131                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2132                 }
2133                 /* allow bindx() to send ASCONF's for binding changes */
2134                 inp->sctp_flags |= SCTP_PCB_FLAGS_DO_ASCONF;
2135                 /* add this address to the endpoint list */
2136                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
2137                 if (error != 0) {
2138                         SCTP_INP_WUNLOCK(inp);
2139                         SCTP_INP_INFO_WUNLOCK();
2140                         return (error);
2141                 }
2142                 inp->laddr_count++;
2143         }
2144         /* find the bucket */
2145         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2146             sctppcbinfo.hashmark)];
2147         /* put it in the bucket */
2148         LIST_INSERT_HEAD(head, inp, sctp_hash);
2149 #ifdef SCTP_DEBUG
2150         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2151                 printf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
2152         }
2153 #endif
2154         /* set in the port */
2155         inp->sctp_lport = lport;
2156
2157         /* turn off just the unbound flag */
2158         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2159         SCTP_INP_WUNLOCK(inp);
2160         SCTP_INP_INFO_WUNLOCK();
2161         return (0);
2162 }
2163
2164
2165 static void
2166 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2167 {
2168         struct sctp_iterator *it;
2169         /* We enter with the only the ITERATOR_LOCK in place and
2170          * A write lock on the inp_info stuff.
2171          */
2172
2173         /* Go through all iterators, we must do this since
2174          * it is possible that some iterator does NOT have
2175          * the lock, but is waiting for it. And the one that
2176          * had the lock has either moved in the last iteration
2177          * or we just cleared it above. We need to find all
2178          * of those guys. The list of iterators should never
2179          * be very big though.
2180          */
2181         LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2182                 if (it == inp->inp_starting_point_for_iterator)
2183                         /* skip this guy, he's special */
2184                         continue;
2185                 if (it->inp == inp) {
2186                         /* This is tricky and we DON'T lock the iterator.
2187                          * Reason is he's running but waiting for me since
2188                          * inp->inp_starting_point_for_iterator has the lock
2189                          * on me (the guy above we skipped). This tells us
2190                          * its is not running but waiting for inp->inp_starting_point_for_iterator
2191                          * to be released by the guy that does have our INP in a lock.
2192                          */
2193                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2194                                 it->inp = NULL;
2195                                 it->stcb = NULL;
2196                         } else {
2197                                 /* set him up to do the next guy not me */
2198                                 it->inp = inp_next;
2199                                 it->stcb = NULL;
2200                         }
2201                 }
2202         }
2203         it = inp->inp_starting_point_for_iterator;
2204         if (it) {
2205                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2206                         it->inp = NULL;
2207                 } else {
2208                         it->inp = inp_next;
2209                 }
2210                 it->stcb = NULL;
2211         }
2212 }
2213
2214 /* release sctp_inpcb unbind the port */
2215 void
2216 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate)
2217 {
2218         /*
2219          * Here we free a endpoint. We must find it (if it is in the Hash
2220          * table) and remove it from there. Then we must also find it in
2221          * the overall list and remove it from there. After all removals are
2222          * complete then any timer has to be stopped. Then start the actual
2223          * freeing.
2224          * a) Any local lists.
2225          * b) Any associations.
2226          * c) The hash of all associations.
2227          * d) finally the ep itself.
2228          */
2229         struct sctp_pcb *m;
2230         struct sctp_inpcb *inp_save;
2231         struct sctp_tcb *asoc, *nasoc;
2232         struct sctp_laddr *laddr, *nladdr;
2233         struct inpcb *ip_pcb;
2234         struct socket *so;
2235         struct sctp_socket_q_list *sq;
2236 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2237         struct rtentry *rt;
2238 #endif
2239         int s, cnt;
2240
2241 #if defined(__NetBSD__) || defined(__OpenBSD__)
2242         s = splsoftnet();
2243 #else
2244         s = splnet();
2245 #endif
2246         SCTP_ASOC_CREATE_LOCK(inp);
2247         SCTP_INP_WLOCK(inp);
2248
2249         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2250                 /* been here before */
2251                 splx(s);
2252                 printf("Endpoint was all gone (dup free)?\n");
2253                 SCTP_INP_WUNLOCK(inp);
2254                 SCTP_ASOC_CREATE_UNLOCK(inp);
2255                 return;
2256         }
2257         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2258
2259         if (inp->control) {
2260                 sctp_m_freem(inp->control);
2261                 inp->control = NULL;
2262         }
2263         if (inp->pkt) {
2264                 sctp_m_freem(inp->pkt);
2265                 inp->pkt = NULL;
2266         }
2267         so  = inp->sctp_socket;
2268         m = &inp->sctp_ep;
2269         ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2270                                    * pointer here but I will
2271                                    * be nice :> (i.e. ip_pcb = ep;)
2272                                    */
2273
2274         if (immediate == 0) {
2275                 int cnt_in_sd;
2276                 cnt_in_sd = 0;
2277                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2278                      asoc = nasoc) {
2279                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2280                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2281                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2282                                 /* Just abandon things in the front states */
2283                                 SCTP_TCB_LOCK(asoc);
2284                                 SCTP_INP_WUNLOCK(inp);
2285                                 sctp_free_assoc(inp, asoc);
2286                                 SCTP_INP_WLOCK(inp);
2287                                 continue;
2288                         } else {
2289                                 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2290                         }
2291                         if ((asoc->asoc.size_on_delivery_queue  > 0) ||
2292                             (asoc->asoc.size_on_reasm_queue > 0) ||
2293                             (asoc->asoc.size_on_all_streams > 0) ||
2294                             (so && (so->so_rcv.sb_cc > 0))
2295                                 ) {
2296                                 /* Left with Data unread */
2297                                 struct mbuf *op_err;
2298                                 MGET(op_err, M_DONTWAIT, MT_DATA);
2299                                 if (op_err) {
2300                                         /* Fill in the user initiated abort */
2301                                         struct sctp_paramhdr *ph;
2302                                         op_err->m_len =
2303                                             sizeof(struct sctp_paramhdr);
2304                                         ph = mtod(op_err,
2305                                             struct sctp_paramhdr *);
2306                                         ph->param_type = htons(
2307                                             SCTP_CAUSE_USER_INITIATED_ABT);
2308                                         ph->param_length = htons(op_err->m_len);
2309                                 }
2310                                 SCTP_TCB_LOCK(asoc);
2311                                 sctp_send_abort_tcb(asoc, op_err);
2312
2313                                 SCTP_INP_WUNLOCK(inp);
2314                                 sctp_free_assoc(inp, asoc);
2315                                 SCTP_INP_WLOCK(inp);
2316                                 continue;
2317                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2318                             TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2319                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2320                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2321                                         /* there is nothing queued to send, so I send shutdown */
2322                                         SCTP_TCB_LOCK(asoc);
2323                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2324                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2325                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2326                                                          asoc->asoc.primary_destination);
2327                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2328                                                          asoc->asoc.primary_destination);
2329                                         sctp_chunk_output(inp, asoc, 1);
2330                                         SCTP_TCB_UNLOCK(asoc);
2331                                 }
2332                         } else {
2333                                 /* mark into shutdown pending */
2334                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2335                         }
2336                         cnt_in_sd++;
2337                 }
2338                 /* now is there some left in our SHUTDOWN state? */
2339                 if (cnt_in_sd) {
2340                         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2341                         splx(s);
2342                         SCTP_INP_WUNLOCK(inp);
2343                         SCTP_ASOC_CREATE_UNLOCK(inp);
2344                         return;
2345                 }
2346         }
2347 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2348         if (inp->refcount) {
2349                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2350                 SCTP_INP_WUNLOCK(inp);
2351                 SCTP_ASOC_CREATE_UNLOCK(inp);
2352                 return;
2353         }
2354 #endif
2355         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2356 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2357         rt = ip_pcb->inp_route.ro_rt;
2358 #endif
2359
2360         callout_stop(&inp->sctp_ep.signature_change.timer);
2361
2362         if (so) {
2363         /* First take care of socket level things */
2364 #ifdef IPSEC
2365 #ifdef __OpenBSD__
2366         /* XXX IPsec cleanup here */
2367                 int s2 = spltdb();
2368                 if (ip_pcb->inp_tdb_in)
2369                     TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2370                                  ip_pcb, inp_tdb_in_next);
2371                 if (ip_pcb->inp_tdb_out)
2372                     TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2373                                  inp_tdb_out_next);
2374                 if (ip_pcb->inp_ipsec_localid)
2375                     ipsp_reffree(ip_pcb->inp_ipsec_localid);
2376                 if (ip_pcb->inp_ipsec_remoteid)
2377                     ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2378                 if (ip_pcb->inp_ipsec_localcred)
2379                     ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2380                 if (ip_pcb->inp_ipsec_remotecred)
2381                     ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2382                 if (ip_pcb->inp_ipsec_localauth)
2383                     ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2384                 if (ip_pcb->inp_ipsec_remoteauth)
2385                     ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2386                 splx(s2);
2387 #else
2388                 ipsec4_delete_pcbpolicy(ip_pcb);
2389 #endif
2390 #endif /*IPSEC*/
2391 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2392                 ACCEPT_LOCK();
2393                 SOCK_LOCK(so);
2394 #endif
2395                 so->so_pcb = 0;
2396 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2397                 sotryfree(so);
2398 #else
2399                 sofree(so);
2400 #endif
2401         }
2402
2403         if (ip_pcb->inp_options) {
2404                 (void)m_free(ip_pcb->inp_options);
2405                 ip_pcb->inp_options = 0;
2406         }
2407 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2408         if (rt) {
2409                 RTFREE(rt);
2410                 ip_pcb->inp_route.ro_rt = 0;
2411         }
2412 #endif
2413         if (ip_pcb->inp_moptions) {
2414                 ip_freemoptions(ip_pcb->inp_moptions);
2415                 ip_pcb->inp_moptions = 0;
2416         }
2417 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2418         inp->inp_vflag = 0;
2419 #else
2420         ip_pcb->inp_vflag = 0;
2421 #endif
2422
2423         /* Now the sctp_pcb things */
2424
2425         /*
2426          * free each asoc if it is not already closed/free. we can't use
2427          * the macro here since le_next will get freed as part of the
2428          * sctp_free_assoc() call.
2429          */
2430         cnt = 0;
2431         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2432              asoc = nasoc) {
2433                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2434                 SCTP_TCB_LOCK(asoc);
2435                 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2436                         struct mbuf *op_err;
2437                         MGET(op_err, M_DONTWAIT, MT_DATA);
2438                         if (op_err) {
2439                                 /* Fill in the user initiated abort */
2440                                 struct sctp_paramhdr *ph;
2441                                 op_err->m_len = sizeof(struct sctp_paramhdr);
2442                                 ph = mtod(op_err, struct sctp_paramhdr *);
2443                                 ph->param_type = htons(
2444                                     SCTP_CAUSE_USER_INITIATED_ABT);
2445                                 ph->param_length = htons(op_err->m_len);
2446                         }
2447                         sctp_send_abort_tcb(asoc, op_err);
2448                 }
2449                 cnt++;
2450                 /*
2451                  * sctp_free_assoc() will call sctp_inpcb_free(),
2452                  * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2453                  * So, we clear it before sctp_free_assoc() making sure
2454                  * no double sctp_inpcb_free().
2455                  */
2456                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2457                 SCTP_INP_WUNLOCK(inp);
2458                 sctp_free_assoc(inp, asoc);
2459                 SCTP_INP_WLOCK(inp);
2460         }
2461         while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2462                 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2463                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2464                 sctppcbinfo.ipi_count_sockq--;
2465                 sctppcbinfo.ipi_gencnt_sockq++;
2466         }
2467         inp->sctp_socket = 0;
2468         /* Now first we remove ourselves from the overall list of all EP's */
2469
2470         /* Unlock inp first, need correct order */
2471         SCTP_INP_WUNLOCK(inp);
2472         /* now iterator lock */
2473         SCTP_ITERATOR_LOCK();
2474         /* now info lock */
2475         SCTP_INP_INFO_WLOCK();
2476         /* now reget the inp lock */
2477         SCTP_INP_WLOCK(inp);
2478
2479         inp_save = LIST_NEXT(inp, sctp_list);
2480         LIST_REMOVE(inp, sctp_list);
2481         /*
2482          * Now the question comes as to if this EP was ever bound at all.
2483          * If it was, then we must pull it out of the EP hash list.
2484          */
2485         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2486             SCTP_PCB_FLAGS_UNBOUND) {
2487                 /*
2488                  * ok, this guy has been bound. It's port is somewhere
2489                  * in the sctppcbinfo hash table. Remove it!
2490                  */
2491                 LIST_REMOVE(inp, sctp_hash);
2492         }
2493         /* fix any iterators only after out of the list */
2494         sctp_iterator_inp_being_freed(inp, inp_save);
2495         SCTP_ITERATOR_UNLOCK();
2496         /*
2497          * if we have an address list the following will free the list of
2498          * ifaddr's that are set into this ep. Again macro limitations here,
2499          * since the LIST_FOREACH could be a bad idea.
2500          */
2501         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2502              laddr = nladdr) {
2503                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2504                 LIST_REMOVE(laddr, sctp_nxt_addr);
2505                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2506                 sctppcbinfo.ipi_gencnt_laddr++;
2507                 sctppcbinfo.ipi_count_laddr--;
2508         }
2509         /* Now lets see about freeing the EP hash table. */
2510         if (inp->sctp_tcbhash != NULL) {
2511                 FREE(inp->sctp_tcbhash, M_PCB);
2512                 inp->sctp_tcbhash = 0;
2513         }
2514         SCTP_INP_WUNLOCK(inp);
2515         SCTP_ASOC_CREATE_UNLOCK(inp);
2516         SCTP_INP_LOCK_DESTROY(inp);
2517         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2518
2519         /* Now we must put the ep memory back into the zone pool */
2520         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2521         sctppcbinfo.ipi_count_ep--;
2522
2523         SCTP_INP_INFO_WUNLOCK();
2524         splx(s);
2525 }
2526
2527
2528 struct sctp_nets *
2529 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2530 {
2531         struct sctp_nets *net;
2532         struct sockaddr_in *sin;
2533         struct sockaddr_in6 *sin6;
2534         /* use the peer's/remote port for lookup if unspecified */
2535         sin = (struct sockaddr_in *)addr;
2536         sin6 = (struct sockaddr_in6 *)addr;
2537 #if 0 /* why do we need to check the port for a nets list on an assoc? */
2538         if (stcb->rport != sin->sin_port) {
2539                 /* we cheat and just a sin for this test */
2540                 return (NULL);
2541         }
2542 #endif
2543         /* locate the address */
2544         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2545                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2546                         return (net);
2547         }
2548         return (NULL);
2549 }
2550
2551
2552 /*
2553  * add's a remote endpoint address, done with the INIT/INIT-ACK
2554  * as well as when a ASCONF arrives that adds it. It will also
2555  * initialize all the cwnd stats of stuff.
2556  */
2557 int
2558 sctp_is_address_on_local_host(struct sockaddr *addr)
2559 {
2560         struct ifnet *ifn;
2561         struct ifaddr *ifa;
2562         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2563                 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
2564                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2565                                 /* same family */
2566                                 if (addr->sa_family == AF_INET) {
2567                                         struct sockaddr_in *sin, *sin_c;
2568                                         sin = (struct sockaddr_in *)addr;
2569                                         sin_c = (struct sockaddr_in *)
2570                                             ifa->ifa_addr;
2571                                         if (sin->sin_addr.s_addr ==
2572                                             sin_c->sin_addr.s_addr) {
2573                                                 /* we are on the same machine */
2574                                                 return (1);
2575                                         }
2576                                 } else if (addr->sa_family == AF_INET6) {
2577                                         struct sockaddr_in6 *sin6, *sin_c6;
2578                                         sin6 = (struct sockaddr_in6 *)addr;
2579                                         sin_c6 = (struct sockaddr_in6 *)
2580                                             ifa->ifa_addr;
2581                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2582                                             &sin_c6->sin6_addr)) {
2583                                                 /* we are on the same machine */
2584                                                 return (1);
2585                                         }
2586                                 }
2587                         }
2588                 }
2589         }
2590         return (0);
2591 }
2592
2593 int
2594 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2595     int set_scope, int from)
2596 {
2597         /*
2598          * The following is redundant to the same lines in the
2599          * sctp_aloc_assoc() but is needed since other's call the add
2600          * address function
2601          */
2602         struct sctp_nets *net, *netfirst;
2603         int addr_inscope;
2604
2605 #ifdef SCTP_DEBUG
2606         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2607                 printf("Adding an address (from:%d) to the peer: ", from);
2608                 sctp_print_address(newaddr);
2609         }
2610 #endif
2611         netfirst = sctp_findnet(stcb, newaddr);
2612         if (netfirst) {
2613                 /*
2614                  * Lie and return ok, we don't want to make the association
2615                  * go away for this behavior. It will happen in the TCP model
2616                  * in a connected socket. It does not reach the hash table
2617                  * until after the association is built so it can't be found.
2618                  * Mark as reachable, since the initial creation will have
2619                  * been cleared and the NOT_IN_ASSOC flag will have been
2620                  * added... and we don't want to end up removing it back out.
2621                  */
2622                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2623                         netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2624                             SCTP_ADDR_UNCONFIRMED);
2625                 } else {
2626                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2627                 }
2628
2629                 return (0);
2630         }
2631         addr_inscope = 1;
2632         if (newaddr->sa_family == AF_INET) {
2633                 struct sockaddr_in *sin;
2634                 sin = (struct sockaddr_in *)newaddr;
2635                 if (sin->sin_addr.s_addr == 0) {
2636                         /* Invalid address */
2637                         return (-1);
2638                 }
2639                 /* zero out the bzero area */
2640                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2641
2642                 /* assure len is set */
2643                 sin->sin_len = sizeof(struct sockaddr_in);
2644                 if (set_scope) {
2645 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2646                         stcb->ipv4_local_scope = 1;
2647 #else
2648                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2649                                 stcb->asoc.ipv4_local_scope = 1;
2650                         }
2651 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2652
2653                         if (sctp_is_address_on_local_host(newaddr)) {
2654                                 stcb->asoc.loopback_scope = 1;
2655                                 stcb->asoc.ipv4_local_scope = 1;
2656                                 stcb->asoc.local_scope = 1;
2657                                 stcb->asoc.site_scope = 1;
2658                         }
2659                 } else {
2660                         if (from == 8) {
2661                                 /* From connectx */
2662                                 if (sctp_is_address_on_local_host(newaddr)) {
2663                                         stcb->asoc.loopback_scope = 1;
2664                                         stcb->asoc.ipv4_local_scope = 1;
2665                                         stcb->asoc.local_scope = 1;
2666                                         stcb->asoc.site_scope = 1;
2667                                 }
2668                         }
2669                         /* Validate the address is in scope */
2670                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2671                             (stcb->asoc.ipv4_local_scope == 0)) {
2672                                 addr_inscope = 0;
2673                         }
2674                 }
2675         } else if (newaddr->sa_family == AF_INET6) {
2676                 struct sockaddr_in6 *sin6;
2677                 sin6 = (struct sockaddr_in6 *)newaddr;
2678                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2679                         /* Invalid address */
2680                         return (-1);
2681                 }
2682                 /* assure len is set */
2683                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2684                 if (set_scope) {
2685                         if (sctp_is_address_on_local_host(newaddr)) {
2686                                 stcb->asoc.loopback_scope = 1;
2687                                 stcb->asoc.local_scope = 1;
2688                                 stcb->asoc.ipv4_local_scope = 1;
2689                                 stcb->asoc.site_scope = 1;
2690                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2691                                 /*
2692                                  * If the new destination is a LINK_LOCAL
2693                                  * we must have common site scope. Don't set
2694                                  * the local scope since we may not share all
2695                                  * links, only loopback can do this.
2696                                  * Links on the local network would also
2697                                  * be on our private network for v4 too.
2698                                  */
2699                                 stcb->asoc.ipv4_local_scope = 1;
2700                                 stcb->asoc.site_scope = 1;
2701                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2702                                 /*
2703                                  * If the new destination is SITE_LOCAL
2704                                  * then we must have site scope in common.
2705                                  */
2706                                 stcb->asoc.site_scope = 1;
2707                         }
2708                 } else {
2709                         if (from == 8) {
2710                                 /* From connectx */
2711                                 if (sctp_is_address_on_local_host(newaddr)) {
2712                                         stcb->asoc.loopback_scope = 1;
2713                                         stcb->asoc.ipv4_local_scope = 1;
2714                                         stcb->asoc.local_scope = 1;
2715                                         stcb->asoc.site_scope = 1;
2716                                 }
2717                         }
2718                         /* Validate the address is in scope */
2719                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2720                             (stcb->asoc.loopback_scope == 0)) {
2721                                 addr_inscope = 0;
2722                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2723                                    (stcb->asoc.local_scope == 0)) {
2724                                 addr_inscope = 0;
2725                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2726                                    (stcb->asoc.site_scope == 0)) {
2727                                 addr_inscope = 0;
2728                         }
2729                 }
2730         } else {
2731                 /* not supported family type */
2732                 return (-1);
2733         }
2734         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2735         if (net == NULL) {
2736                 return (-1);
2737         }
2738         sctppcbinfo.ipi_count_raddr++;
2739         sctppcbinfo.ipi_gencnt_raddr++;
2740         bzero(net, sizeof(*net));
2741         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2742         if (newaddr->sa_family == AF_INET) {
2743                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2744         } else if (newaddr->sa_family == AF_INET6) {
2745                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2746         }
2747         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2748         net->failure_threshold = stcb->asoc.def_net_failure;
2749         if (addr_inscope == 0) {
2750 #ifdef SCTP_DEBUG
2751                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2752                         printf("Adding an address which is OUT OF SCOPE\n");
2753                 }
2754 #endif /* SCTP_DEBUG */
2755                 net->dest_state = (SCTP_ADDR_REACHABLE |
2756                     SCTP_ADDR_OUT_OF_SCOPE);
2757         } else {
2758                 if (from == 8)
2759                         /* 8 is passed by connect_x */
2760                         net->dest_state = SCTP_ADDR_REACHABLE;
2761                 else
2762                         net->dest_state = SCTP_ADDR_REACHABLE |
2763                             SCTP_ADDR_UNCONFIRMED;
2764         }
2765         net->RTO = stcb->asoc.initial_rto;
2766         stcb->asoc.numnets++;
2767         net->ref_count = 1;
2768
2769         /* Init the timer structure */
2770 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2771         callout_init(&net->rxt_timer.timer, 0);
2772 #else
2773         callout_init(&net->rxt_timer.timer);
2774 #endif
2775
2776         /* Now generate a route for this guy */
2777         /* KAME hack: embed scopeid */
2778         if (newaddr->sa_family == AF_INET6) {
2779                 struct sockaddr_in6 *sin6;
2780                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2781 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2782                 (void)in6_embedscope(&sin6->sin6_addr, sin6,
2783                     &stcb->sctp_ep->ip_inp.inp, NULL);
2784 #else
2785                 (void)in6_embedscope(&sin6->sin6_addr, sin6);
2786 #endif
2787 #ifndef SCOPEDROUTING
2788                 sin6->sin6_scope_id = 0;
2789 #endif
2790         }
2791 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2792         rtalloc_ign((struct route *)&net->ro, 0UL);
2793 #else
2794         rtalloc((struct route *)&net->ro);
2795 #endif
2796         if (newaddr->sa_family == AF_INET6) {
2797                 struct sockaddr_in6 *sin6;
2798                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2799                 (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2800         }
2801         if ((net->ro.ro_rt) &&
2802             (net->ro.ro_rt->rt_ifp)) {
2803                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2804                 if (from == 1) {
2805                         stcb->asoc.smallest_mtu = net->mtu;
2806                 }
2807                 /* start things off to match mtu of interface please. */
2808                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2809         } else {
2810                 net->mtu = stcb->asoc.smallest_mtu;
2811         }
2812         if (stcb->asoc.smallest_mtu > net->mtu) {
2813                 stcb->asoc.smallest_mtu = net->mtu;
2814         }
2815         /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2816          * We then limit this to 4 MTU's of sending.
2817          */
2818         net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2819
2820         /* we always get at LEAST 2 MTU's */
2821         if (net->cwnd < (2 * net->mtu)) {
2822                 net->cwnd = 2 * net->mtu;
2823         }
2824
2825         net->ssthresh = stcb->asoc.peers_rwnd;
2826
2827         net->src_addr_selected = 0;
2828         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2829         if (net->ro.ro_rt == NULL) {
2830                 /* Since we have no route put it at the back */
2831                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2832         } else if (netfirst == NULL) {
2833                 /* We are the first one in the pool. */
2834                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2835         } else if (netfirst->ro.ro_rt == NULL) {
2836                 /*
2837                  * First one has NO route. Place this one ahead of the
2838                  * first one.
2839                  */
2840                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2841         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2842                 /*
2843                  * This one has a different interface than the one at the
2844                  * top of the list. Place it ahead.
2845                  */
2846                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2847         } else {
2848                 /*
2849                  * Ok we have the same interface as the first one. Move
2850                  * forward until we find either
2851                  *   a) one with a NULL route... insert ahead of that
2852                  *   b) one with a different ifp.. insert after that.
2853                  *   c) end of the list.. insert at the tail.
2854                  */
2855                 struct sctp_nets *netlook;
2856                 do {
2857                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2858                         if (netlook == NULL) {
2859                                 /* End of the list */
2860                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2861                                     sctp_next);
2862                                 break;
2863                         } else if (netlook->ro.ro_rt == NULL) {
2864                                 /* next one has NO route */
2865                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2866                                 break;
2867                         } else if (netlook->ro.ro_rt->rt_ifp !=
2868                                    net->ro.ro_rt->rt_ifp) {
2869                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2870                                     net, sctp_next);
2871                                 break;
2872                         }
2873                         /* Shift forward */
2874                         netfirst = netlook;
2875                 } while (netlook != NULL);
2876         }
2877         /* got to have a primary set */
2878         if (stcb->asoc.primary_destination == 0) {
2879                 stcb->asoc.primary_destination = net;
2880         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2881                    (net->ro.ro_rt)) {
2882                 /* No route to current primary adopt new primary */
2883                 stcb->asoc.primary_destination = net;
2884         }
2885         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2886             net);
2887
2888         return (0);
2889 }
2890
2891
2892 /*
2893  * allocate an association and add it to the endpoint. The caller must
2894  * be careful to add all additional addresses once they are know right
2895  * away or else the assoc will be may experience a blackout scenario.
2896  */
2897 struct sctp_tcb *
2898 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2899     int for_a_init, int *error,  uint32_t override_tag)
2900 {
2901         struct sctp_tcb *stcb;
2902         struct sctp_association *asoc;
2903         struct sctpasochead *head;
2904         uint16_t rport;
2905         int err;
2906
2907         /*
2908          * Assumption made here:
2909          *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2910          *  to make sure the address does not exist already.
2911          */
2912         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2913                 /* Hit max assoc, sorry no more */
2914                 *error = ENOBUFS;
2915                 return (NULL);
2916         }
2917         SCTP_INP_RLOCK(inp);
2918         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2919                 /*
2920                  * If its in the TCP pool, its NOT allowed to create an
2921                  * association. The parent listener needs to call
2922                  * sctp_aloc_assoc.. or the one-2-many socket. If a
2923                  * peeled off, or connected one does this.. its an error.
2924                  */
2925                 SCTP_INP_RUNLOCK(inp);
2926                 *error = EINVAL;
2927                 return (NULL);
2928         }
2929
2930 #ifdef SCTP_DEBUG
2931         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2932                 printf("Allocate an association for peer:");
2933                 if (firstaddr)
2934                         sctp_print_address(firstaddr);
2935                 else
2936                         printf("None\n");
2937                 printf("Port:%d\n",
2938                        ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2939         }
2940 #endif /* SCTP_DEBUG */
2941         if (firstaddr->sa_family == AF_INET) {
2942                 struct sockaddr_in *sin;
2943                 sin = (struct sockaddr_in *)firstaddr;
2944                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2945                         /* Invalid address */
2946 #ifdef SCTP_DEBUG
2947                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2948                                 printf("peer address invalid\n");
2949                         }
2950 #endif
2951                         SCTP_INP_RUNLOCK(inp);
2952                         *error = EINVAL;
2953                         return (NULL);
2954                 }
2955                 rport = sin->sin_port;
2956         } else if (firstaddr->sa_family == AF_INET6) {
2957                 struct sockaddr_in6 *sin6;
2958                 sin6 = (struct sockaddr_in6 *)firstaddr;
2959                 if ((sin6->sin6_port == 0) ||
2960                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2961                         /* Invalid address */
2962 #ifdef SCTP_DEBUG
2963                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2964                                 printf("peer address invalid\n");
2965                         }
2966 #endif
2967                         SCTP_INP_RUNLOCK(inp);
2968                         *error = EINVAL;
2969                         return (NULL);
2970                 }
2971                 rport = sin6->sin6_port;
2972         } else {
2973                 /* not supported family type */
2974 #ifdef SCTP_DEBUG
2975                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2976                         printf("BAD family %d\n", firstaddr->sa_family);
2977                 }
2978 #endif
2979                 SCTP_INP_RUNLOCK(inp);
2980                 *error = EINVAL;
2981                 return (NULL);
2982         }
2983         SCTP_INP_RUNLOCK(inp);
2984         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2985                 /*
2986                  * If you have not performed a bind, then we need to do
2987                  * the ephemerial bind for you.
2988                  */
2989 #ifdef SCTP_DEBUG
2990                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2991                         printf("Doing implicit BIND\n");
2992                 }
2993 #endif
2994
2995                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2996                     (struct sockaddr *)NULL,
2997 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2998                                            (struct thread *)NULL
2999 #else
3000                                            (struct proc *)NULL
3001 #endif
3002                              ))){
3003                         /* bind error, probably perm */
3004 #ifdef SCTP_DEBUG
3005                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3006                                 printf("BIND FAILS ret:%d\n", err);
3007                         }
3008 #endif
3009
3010                         *error = err;
3011                         return (NULL);
3012                 }
3013         }
3014         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3015         if (stcb == NULL) {
3016                 /* out of memory? */
3017 #ifdef SCTP_DEBUG
3018                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3019                         printf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3020                 }
3021 #endif
3022                 *error = ENOMEM;
3023                 return (NULL);
3024         }
3025         sctppcbinfo.ipi_count_asoc++;
3026         sctppcbinfo.ipi_gencnt_asoc++;
3027
3028         bzero(stcb, sizeof(*stcb));
3029         asoc = &stcb->asoc;
3030         SCTP_TCB_LOCK_INIT(stcb);
3031         /* setup back pointer's */
3032         stcb->sctp_ep = inp;
3033         stcb->sctp_socket = inp->sctp_socket;
3034         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3035                 /* failed */
3036                 SCTP_TCB_LOCK_DESTROY (stcb);
3037                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3038                 sctppcbinfo.ipi_count_asoc--;
3039 #ifdef SCTP_DEBUG
3040                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3041                         printf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3042                 }
3043 #endif
3044                 *error = err;
3045                 return (NULL);
3046         }
3047         /* and the port */
3048         stcb->rport = rport;
3049         SCTP_INP_INFO_WLOCK();
3050         SCTP_INP_WLOCK(inp);
3051         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3052                 /* inpcb freed while alloc going on */
3053                 SCTP_TCB_LOCK_DESTROY (stcb);
3054                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3055                 SCTP_INP_WUNLOCK(inp);
3056                 SCTP_INP_INFO_WUNLOCK();
3057                 sctppcbinfo.ipi_count_asoc--;
3058 #ifdef SCTP_DEBUG
3059                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3060                         printf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3061                 }
3062 #endif
3063                 *error = EINVAL;
3064                 return (NULL);
3065         }
3066         SCTP_TCB_LOCK(stcb);
3067
3068         /* now that my_vtag is set, add it to the  hash */
3069         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3070              sctppcbinfo.hashasocmark)];
3071         /* put it in the bucket in the vtag hash of assoc's for the system */
3072         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3073         SCTP_INP_INFO_WUNLOCK();
3074
3075
3076         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3077                 /* failure.. memory error? */
3078                 if (asoc->strmout)
3079                         FREE(asoc->strmout, M_PCB);
3080                 if (asoc->mapping_array)
3081                         FREE(asoc->mapping_array, M_PCB);
3082
3083                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3084                 sctppcbinfo.ipi_count_asoc--;
3085 #ifdef SCTP_DEBUG
3086                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3087                         printf("aloc_assoc: couldn't add remote addr!\n");
3088                 }
3089 #endif
3090                 SCTP_TCB_LOCK_DESTROY (stcb);
3091                 *error = ENOBUFS;
3092                 return (NULL);
3093         }
3094         /* Init all the timers */
3095 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3096         callout_init(&asoc->hb_timer.timer, 0);
3097         callout_init(&asoc->dack_timer.timer, 0);
3098         callout_init(&asoc->asconf_timer.timer, 0);
3099         callout_init(&asoc->shut_guard_timer.timer, 0);
3100         callout_init(&asoc->autoclose_timer.timer, 0);
3101 #else
3102         callout_init(&asoc->hb_timer.timer);
3103         callout_init(&asoc->dack_timer.timer);
3104         callout_init(&asoc->asconf_timer.timer);
3105         callout_init(&asoc->shut_guard_timer.timer);
3106         callout_init(&asoc->autoclose_timer.timer);
3107 #endif
3108         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3109         /* now file the port under the hash as well */
3110         if (inp->sctp_tcbhash != NULL) {
3111                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3112                    inp->sctp_hashmark)];
3113                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3114         }
3115         SCTP_INP_WUNLOCK(inp);
3116 #ifdef SCTP_DEBUG
3117         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3118                 printf("Association %p now allocated\n", stcb);
3119         }
3120 #endif
3121         return (stcb);
3122 }
3123
3124 void
3125 sctp_free_remote_addr(struct sctp_nets *net)
3126 {
3127         if (net == NULL)
3128                 return;
3129         net->ref_count--;
3130         if (net->ref_count <= 0) {
3131                 /* stop timer if running */
3132                 callout_stop(&net->rxt_timer.timer);
3133                 callout_stop(&net->pmtu_timer.timer);
3134                 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3135                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3136                 sctppcbinfo.ipi_count_raddr--;
3137         }
3138 }
3139
3140 /*
3141  * remove a remote endpoint address from an association, it
3142  * will fail if the address does not exist.
3143  */
3144 int
3145 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3146 {
3147         /*
3148          * Here we need to remove a remote address. This is quite simple, we
3149          * first find it in the list of address for the association
3150          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3151          * that item.
3152          * Note we do not allow it to be removed if there are no other
3153          * addresses.
3154          */
3155         struct sctp_association *asoc;
3156         struct sctp_nets *net, *net_tmp;
3157         asoc = &stcb->asoc;
3158         if (asoc->numnets < 2) {
3159                 /* Must have at LEAST two remote addresses */
3160                 return (-1);
3161         }
3162         /* locate the address */
3163         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3164                 net_tmp = TAILQ_NEXT(net, sctp_next);
3165                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3166                         continue;
3167                 }
3168                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3169                     remaddr)) {
3170                         /* we found the guy */
3171                         asoc->numnets--;
3172                         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3173                         sctp_free_remote_addr(net);
3174                         if (net == asoc->primary_destination) {
3175                                 /* Reset primary */
3176                                 struct sctp_nets *lnet;
3177                                 lnet = TAILQ_FIRST(&asoc->nets);
3178                                 /* Try to find a confirmed primary */
3179                                 asoc->primary_destination =
3180                                     sctp_find_alternate_net(stcb, lnet);
3181                         }
3182                         if (net == asoc->last_data_chunk_from) {
3183                                 /* Reset primary */
3184                                 asoc->last_data_chunk_from =
3185                                     TAILQ_FIRST(&asoc->nets);
3186                         }
3187                         if (net == asoc->last_control_chunk_from) {
3188                                 /* Reset primary */
3189                                 asoc->last_control_chunk_from =
3190                                     TAILQ_FIRST(&asoc->nets);
3191                         }
3192                         if (net == asoc->asconf_last_sent_to) {
3193                                 /* Reset primary */
3194                                 asoc->asconf_last_sent_to =
3195                                     TAILQ_FIRST(&asoc->nets);
3196                         }
3197                         return (0);
3198                 }
3199         }
3200         /* not found. */
3201         return (-2);
3202 }
3203
3204
3205 static void
3206 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3207 {
3208         struct sctpvtaghead *chain;
3209         struct sctp_tagblock *twait_block;
3210         struct timeval now;
3211         int set, i;
3212         SCTP_GETTIME_TIMEVAL(&now);
3213         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3214         set = 0;
3215         if (!LIST_EMPTY(chain)) {
3216                 /* Block(s) present, lets find space, and expire on the fly */
3217                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3218                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3219                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3220                                     !set) {
3221                                         twait_block->vtag_block[0].tv_sec_at_expire =
3222                                             now.tv_sec + SCTP_TIME_WAIT;
3223                                         twait_block->vtag_block[0].v_tag = tag;
3224                                         set = 1;
3225                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3226                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3227                                     now.tv_sec)) {
3228                                         /* Audit expires this guy */
3229                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3230                                         twait_block->vtag_block[i].v_tag = 0;
3231                                         if (set == 0) {
3232                                                 /* Reuse it for my new tag */
3233                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3234                                                 twait_block->vtag_block[0].v_tag = tag;
3235                                                 set = 1;
3236                                         }
3237                                 }
3238                         }
3239                         if (set) {
3240                                 /*
3241                                  * We only do up to the block where we can
3242                                  * place our tag for audits
3243                                  */
3244                                 break;
3245                         }
3246                 }
3247         }
3248         /* Need to add a new block to chain */
3249         if (!set) {
3250                 MALLOC(twait_block, struct sctp_tagblock *,
3251                        sizeof(struct sctp_tagblock), M_PCB, M_NOWAIT);
3252                 if (twait_block == NULL) {
3253                         return;
3254                 }
3255                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3256                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3257                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3258                     SCTP_TIME_WAIT;
3259                 twait_block->vtag_block[0].v_tag = tag;
3260         }
3261 }
3262
3263
3264 static void
3265 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3266 {
3267         struct sctp_iterator *it;
3268
3269
3270
3271         /* Unlock the tcb lock we do this so
3272          * we avoid a dead lock scenario where
3273          * the iterator is waiting on the TCB lock
3274          * and the TCB lock is waiting on the iterator
3275          * lock.
3276          */
3277         SCTP_ITERATOR_LOCK();
3278         SCTP_INP_INFO_WLOCK();
3279         SCTP_INP_WLOCK(inp);
3280         SCTP_TCB_LOCK(stcb);
3281
3282         it = stcb->asoc.stcb_starting_point_for_iterator;
3283         if (it == NULL) {
3284                 return;
3285         }
3286         if (it->inp != stcb->sctp_ep) {
3287                 /* hm, focused on the wrong one? */
3288                 return;
3289         }
3290         if (it->stcb != stcb) {
3291                 return;
3292         }
3293         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3294         if (it->stcb == NULL) {
3295                 /* done with all asoc's in this assoc */
3296                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3297                         it->inp = NULL;
3298                 } else {
3299
3300                         it->inp = LIST_NEXT(inp, sctp_list);
3301                 }
3302         }
3303 }
3304
3305 /*
3306  * Free the association after un-hashing the remote port.
3307  */
3308 void
3309 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3310 {
3311         struct sctp_association *asoc;
3312         struct sctp_nets *net, *prev;
3313         struct sctp_laddr *laddr;
3314         struct sctp_tmit_chunk *chk;
3315         struct sctp_asconf_addr *aparam;
3316         struct sctp_socket_q_list *sq;
3317         int s;
3318
3319         /* first, lets purge the entry from the hash table. */
3320 #if defined(__NetBSD__) || defined(__OpenBSD__)
3321         s = splsoftnet();
3322 #else
3323         s = splnet();
3324 #endif
3325         if (stcb->asoc.state == 0) {
3326                 printf("Freeing already free association:%p - huh??\n",
3327                     stcb);
3328                 splx(s);
3329                 return;
3330         }
3331         asoc = &stcb->asoc;
3332         asoc->state = 0;
3333         /* now clean up any other timers */
3334         callout_stop(&asoc->hb_timer.timer);
3335         callout_stop(&asoc->dack_timer.timer);
3336         callout_stop(&asoc->asconf_timer.timer);
3337         callout_stop(&asoc->shut_guard_timer.timer);
3338         callout_stop(&asoc->autoclose_timer.timer);
3339         callout_stop(&asoc->delayed_event_timer.timer);
3340         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3341                 callout_stop(&net->rxt_timer.timer);
3342                 callout_stop(&net->pmtu_timer.timer);
3343         }
3344
3345         /* Iterator asoc being freed we send an
3346          * unlocked TCB. It returns with INP_INFO
3347          * and INP write locked and the TCB locked
3348          * too and of course the iterator lock
3349          * in place as well..
3350          */
3351         SCTP_TCB_UNLOCK(stcb);
3352         sctp_iterator_asoc_being_freed(inp, stcb);
3353
3354         /* Null all of my entry's on the socket q */
3355         TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3356                 if (sq->tcb == stcb) {
3357                         sq->tcb = NULL;
3358                 }
3359         }
3360
3361         if (inp->sctp_tcb_at_block == (void *)stcb) {
3362                 inp->error_on_block = ECONNRESET;
3363         }
3364
3365         if (inp->sctp_tcbhash) {
3366                 LIST_REMOVE(stcb, sctp_tcbhash);
3367         }
3368         /* Now lets remove it from the list of ALL associations in the EP */
3369         LIST_REMOVE(stcb, sctp_tcblist);
3370         SCTP_INP_WUNLOCK(inp);
3371         SCTP_ITERATOR_UNLOCK();
3372
3373
3374         /* pull from vtag hash */
3375         LIST_REMOVE(stcb, sctp_asocs);
3376
3377         /*
3378          * Now before we can free the assoc, we must  remove all of the
3379          * networks and any other allocated space.. i.e. add removes here
3380          * before the SCTP_ZONE_FREE() of the tasoc entry.
3381          */
3382
3383         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3384         SCTP_INP_INFO_WUNLOCK();
3385         prev = NULL;
3386         while (!TAILQ_EMPTY(&asoc->nets)) {
3387                 net = TAILQ_FIRST(&asoc->nets);
3388                 /* pull from list */
3389                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3390                         break;
3391                 }
3392                 prev = net;
3393                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3394                 /* free it */
3395                 net->ref_count = 0;
3396                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3397                 sctppcbinfo.ipi_count_raddr--;
3398         }
3399         /*
3400          * The chunk lists and such SHOULD be empty but we check them
3401          * just in case.
3402          */
3403         /* anything on the wheel needs to be removed */
3404         while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3405                 struct sctp_stream_out *outs;
3406                 outs = TAILQ_FIRST(&asoc->out_wheel);
3407                 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3408                 /* now clean up any chunks here */
3409                 chk = TAILQ_FIRST(&outs->outqueue);
3410                 while (chk) {
3411                         TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3412                         if (chk->data) {
3413                                 sctp_m_freem(chk->data);
3414                                 chk->data = NULL;
3415                         }
3416                         chk->whoTo = NULL;
3417                         chk->asoc = NULL;
3418                         /* Free the chunk */
3419                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3420                         sctppcbinfo.ipi_count_chunk--;
3421                         sctppcbinfo.ipi_gencnt_chunk++;
3422                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3423                                 panic("Chunk count is negative");
3424                         }
3425                         chk = TAILQ_FIRST(&outs->outqueue);
3426                 }
3427                 outs = TAILQ_FIRST(&asoc->out_wheel);
3428         }
3429
3430         if (asoc->pending_reply) {
3431                 FREE(asoc->pending_reply, M_PCB);
3432                 asoc->pending_reply = NULL;
3433         }
3434         chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3435         while (chk) {
3436                 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3437                 if (chk->data) {
3438                         sctp_m_freem(chk->data);
3439                         chk->data = NULL;
3440                 }
3441                 chk->whoTo = NULL;
3442                 chk->asoc = NULL;
3443                 /* Free the chunk */
3444                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3445                 sctppcbinfo.ipi_count_chunk--;
3446                 sctppcbinfo.ipi_gencnt_chunk++;
3447                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3448                         panic("Chunk count is negative");
3449                 }
3450                 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3451         }
3452         /* pending send queue SHOULD be empty */
3453         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3454                 chk = TAILQ_FIRST(&asoc->send_queue);
3455                 while (chk) {
3456                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3457                         if (chk->data) {
3458                                 sctp_m_freem(chk->data);
3459                                 chk->data = NULL;
3460                         }
3461                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3462                         sctppcbinfo.ipi_count_chunk--;
3463                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3464                                 panic("Chunk count is negative");
3465                         }
3466                         sctppcbinfo.ipi_gencnt_chunk++;
3467                         chk = TAILQ_FIRST(&asoc->send_queue);
3468                 }
3469         }
3470         /* sent queue SHOULD be empty */
3471         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3472                 chk = TAILQ_FIRST(&asoc->sent_queue);
3473                 while (chk) {
3474                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3475                         if (chk->data) {
3476                                 sctp_m_freem(chk->data);
3477                                 chk->data = NULL;
3478                         }
3479                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3480                         sctppcbinfo.ipi_count_chunk--;
3481                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3482                                 panic("Chunk count is negative");
3483                         }
3484                         sctppcbinfo.ipi_gencnt_chunk++;
3485                         chk = TAILQ_FIRST(&asoc->sent_queue);
3486                 }
3487         }
3488         /* control queue MAY not be empty */
3489         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3490                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3491                 while (chk) {
3492                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3493                         if (chk->data) {
3494                                 sctp_m_freem(chk->data);
3495                                 chk->data = NULL;
3496                         }
3497                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3498                         sctppcbinfo.ipi_count_chunk--;
3499                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3500                                 panic("Chunk count is negative");
3501                         }
3502                         sctppcbinfo.ipi_gencnt_chunk++;
3503                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3504                 }
3505         }
3506         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3507                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3508                 while (chk) {
3509                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3510                         if (chk->data) {
3511                                 sctp_m_freem(chk->data);
3512                                 chk->data = NULL;
3513                         }
3514                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3515                         sctppcbinfo.ipi_count_chunk--;
3516                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3517                                 panic("Chunk count is negative");
3518                         }
3519                         sctppcbinfo.ipi_gencnt_chunk++;
3520                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3521                 }
3522         }
3523         if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3524                 chk = TAILQ_FIRST(&asoc->delivery_queue);
3525                 while (chk) {
3526                         TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3527                         if (chk->data) {
3528                                 sctp_m_freem(chk->data);
3529                                 chk->data = NULL;
3530                         }
3531                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3532                         sctppcbinfo.ipi_count_chunk--;
3533                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3534                                 panic("Chunk count is negative");
3535                         }
3536                         sctppcbinfo.ipi_gencnt_chunk++;
3537                         chk = TAILQ_FIRST(&asoc->delivery_queue);
3538                 }
3539         }
3540         if (asoc->mapping_array) {
3541                 FREE(asoc->mapping_array, M_PCB);
3542                 asoc->mapping_array = NULL;
3543         }
3544
3545         /* the stream outs */
3546         if (asoc->strmout) {
3547                 FREE(asoc->strmout, M_PCB);
3548                 asoc->strmout = NULL;
3549         }
3550         asoc->streamoutcnt = 0;
3551         if (asoc->strmin) {
3552                 int i;
3553                 for (i = 0; i < asoc->streamincnt; i++) {
3554                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3555                                 /* We have somethings on the streamin queue */
3556                                 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3557                                 while (chk) {
3558                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3559                                             chk, sctp_next);
3560                                         if (chk->data) {
3561                                                 sctp_m_freem(chk->data);
3562                                                 chk->data = NULL;
3563                                         }
3564                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3565                                             chk);
3566                                         sctppcbinfo.ipi_count_chunk--;
3567                                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3568                                                 panic("Chunk count is negative");
3569                                         }
3570                                         sctppcbinfo.ipi_gencnt_chunk++;
3571                                         chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3572                                 }
3573                         }
3574                 }
3575                 FREE(asoc->strmin, M_PCB);
3576                 asoc->strmin = NULL;
3577         }
3578         asoc->streamincnt = 0;
3579         /* local addresses, if any */
3580         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3581                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3582                 LIST_REMOVE(laddr, sctp_nxt_addr);
3583                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3584                 sctppcbinfo.ipi_count_laddr--;
3585         }
3586         /* pending asconf (address) parameters */
3587         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3588                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3589                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3590                 FREE(aparam, M_PCB);
3591         }
3592         if (asoc->last_asconf_ack_sent != NULL) {
3593                 sctp_m_freem(asoc->last_asconf_ack_sent);
3594                 asoc->last_asconf_ack_sent = NULL;
3595         }
3596         /* Insert new items here :> */
3597
3598         /* Get rid of LOCK */
3599         SCTP_TCB_LOCK_DESTROY(stcb);
3600
3601         /* now clean up the tasoc itself */
3602         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3603         sctppcbinfo.ipi_count_asoc--;
3604         if ((inp->sctp_socket->so_snd.sb_cc) ||
3605             (inp->sctp_socket->so_snd.sb_mbcnt)) {
3606                 /* This will happen when a abort is done */
3607                 inp->sctp_socket->so_snd.sb_cc = 0;
3608                 inp->sctp_socket->so_snd.sb_mbcnt = 0;
3609         }
3610         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3611                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3612                         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3613                                 /*
3614                                  * For the base fd, that is NOT in TCP pool we
3615                                  * turn off the connected flag. This allows
3616                                  * non-listening endpoints to connect/shutdown/
3617                                  * connect.
3618                                  */
3619                                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3620                                 soisdisconnected(inp->sctp_socket);
3621                         }
3622                         /*
3623                          * For those that are in the TCP pool we just leave
3624                          * so it cannot be used. When they close the fd we
3625                          * will free it all.
3626                          */
3627                 }
3628         }
3629         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3630                 sctp_inpcb_free(inp, 0);
3631         }
3632         splx(s);
3633 }
3634
3635
3636 /*
3637  * determine if a destination is "reachable" based upon the addresses
3638  * bound to the current endpoint (e.g. only v4 or v6 currently bound)
3639  */
3640 /*
3641  * FIX: if we allow assoc-level bindx(), then this needs to be fixed
3642  * to use assoc level v4/v6 flags, as the assoc *may* not have the
3643  * same address types bound as its endpoint
3644  */
3645 int
3646 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
3647 {
3648         struct sctp_inpcb *inp;
3649         int answer;
3650
3651         /* No locks here, the TCB, in all cases is already
3652          * locked and an assoc is up. There is either a
3653          * INP lock by the caller applied (in asconf case when
3654          * deleting an address) or NOT in the HB case, however
3655          * if HB then the INP increment is up and the INP
3656          * will not be removed (on top of the fact that
3657          * we have a TCB lock). So we only want to
3658          * read the sctp_flags, which is either bound-all
3659          * or not.. no protection needed since once an
3660          * assoc is up you can't be changing your binding.
3661          */
3662         inp = stcb->sctp_ep;
3663         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3664                 /* if bound all, destination is not restricted */
3665                 /* RRS: Question during lock work: Is this
3666                  * correct? If you are bound-all you still
3667                  * might need to obey the V4--V6 flags???
3668                  * IMO this bound-all stuff needs to be removed!
3669                  */
3670                 return (1);
3671         }
3672         /* NOTE: all "scope" checks are done when local addresses are added */
3673         if (destaddr->sa_family == AF_INET6) {
3674 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3675                 answer = inp->inp_vflag & INP_IPV6;
3676 #else
3677                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
3678 #endif
3679         } else if (destaddr->sa_family == AF_INET) {
3680 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3681                 answer = inp->inp_vflag & INP_IPV4;
3682 #else
3683                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
3684 #endif
3685         } else {
3686                 /* invalid family, so it's unreachable */
3687                 answer = 0;
3688         }
3689         return (answer);
3690 }
3691
3692 /*
3693  * update the inp_vflags on an endpoint
3694  */
3695 static void
3696 sctp_update_ep_vflag(struct sctp_inpcb *inp) {
3697         struct sctp_laddr *laddr;
3698
3699         /* first clear the flag */
3700 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3701         inp->inp_vflag = 0;
3702 #else
3703         inp->ip_inp.inp.inp_vflag = 0;
3704 #endif
3705         /* set the flag based on addresses on the ep list */
3706         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3707                 if (laddr->ifa == NULL) {
3708 #ifdef SCTP_DEBUG
3709                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3710                                 printf("An ounce of prevention is worth a pound of cure\n");
3711                         }
3712 #endif /* SCTP_DEBUG */
3713                         continue;
3714                 }
3715                 if (laddr->ifa->ifa_addr) {
3716                         continue;
3717                 }
3718                 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
3719 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3720                         inp->inp_vflag |= INP_IPV6;
3721 #else
3722                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3723 #endif
3724                 } else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
3725 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3726                         inp->inp_vflag |= INP_IPV4;
3727 #else
3728                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3729 #endif
3730                 }
3731         }
3732 }
3733
3734 /*
3735  * Add the address to the endpoint local address list
3736  * There is nothing to be done if we are bound to all addresses
3737  */
3738 int
3739 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3740 {
3741         struct sctp_laddr *laddr;
3742         int fnd, error;
3743         fnd = 0;
3744
3745         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3746                 /* You are already bound to all. You have it already */
3747                 return (0);
3748         }
3749         if (ifa->ifa_addr->sa_family == AF_INET6) {
3750                 struct in6_ifaddr *ifa6;
3751                 ifa6 = (struct in6_ifaddr *)ifa;
3752                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3753                     IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
3754                         /* Can't bind a non-existent addr. */
3755                         return (-1);
3756         }
3757         /* first, is it already present? */
3758         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3759                 if (laddr->ifa == ifa) {
3760                         fnd = 1;
3761                         break;
3762                 }
3763         }
3764
3765         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
3766                 /* Not bound to all */
3767                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
3768                 if (error != 0)
3769                         return (error);
3770                 inp->laddr_count++;
3771                 /* update inp_vflag flags */
3772                 if (ifa->ifa_addr->sa_family == AF_INET6) {
3773 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3774                         inp->inp_vflag |= INP_IPV6;
3775 #else
3776                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3777 #endif
3778                 } else if (ifa->ifa_addr->sa_family == AF_INET) {
3779 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3780                         inp->inp_vflag |= INP_IPV4;
3781 #else
3782                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3783 #endif
3784                 }
3785         }
3786         return (0);
3787 }
3788
3789
3790 /*
3791  * select a new (hopefully reachable) destination net
3792  * (should only be used when we deleted an ep addr that is the
3793  * only usable source address to reach the destination net)
3794  */
3795 static void
3796 sctp_select_primary_destination(struct sctp_tcb *stcb)
3797 {
3798         struct sctp_nets *net;
3799
3800         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3801                 /* for now, we'll just pick the first reachable one we find */
3802                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
3803                         continue;
3804                 if (sctp_destination_is_reachable(stcb,
3805                     (struct sockaddr *)&net->ro._l_addr)) {
3806                         /* found a reachable destination */
3807                         stcb->asoc.primary_destination = net;
3808                 }
3809         }
3810         /* I can't there from here! ...we're gonna die shortly... */
3811 }
3812
3813
3814 /*
3815  * Delete the address from the endpoint local address list
3816  * There is nothing to be done if we are bound to all addresses
3817  */
3818 int
3819 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3820 {
3821         struct sctp_laddr *laddr;
3822         int fnd;
3823         fnd = 0;
3824         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3825                 /* You are already bound to all. You have it already */
3826                 return (EINVAL);
3827         }
3828
3829         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3830                 if (laddr->ifa == ifa) {
3831                         fnd = 1;
3832                         break;
3833                 }
3834         }
3835         if (fnd && (inp->laddr_count < 2)) {
3836                 /* can't delete unless there are at LEAST 2 addresses */
3837                 return (-1);
3838         }
3839         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
3840                 /*
3841                  * clean up any use of this address
3842                  * go through our associations and clear any
3843                  *  last_used_address that match this one
3844                  * for each assoc, see if a new primary_destination is needed
3845                  */
3846                 struct sctp_tcb *stcb;
3847
3848                 /* clean up "next_addr_touse" */
3849                 if (inp->next_addr_touse == laddr)
3850                         /* delete this address */
3851                         inp->next_addr_touse = NULL;
3852
3853                 /* clean up "last_used_address" */
3854                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3855                         if (stcb->asoc.last_used_address == laddr)
3856                                 /* delete this address */
3857                                 stcb->asoc.last_used_address = NULL;
3858                 } /* for each tcb */
3859
3860                 /* remove it from the ep list */
3861                 sctp_remove_laddr(laddr);
3862                 inp->laddr_count--;
3863                 /* update inp_vflag flags */
3864                 sctp_update_ep_vflag(inp);
3865                 /* select a new primary destination if needed */
3866                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3867                         /* presume caller (sctp_asconf.c) already owns INP lock */
3868                         SCTP_TCB_LOCK(stcb);
3869                         if (sctp_destination_is_reachable(stcb,
3870                             (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr) == 0) {
3871                                 sctp_select_primary_destination(stcb);
3872                         }
3873                         SCTP_TCB_UNLOCK(stcb);
3874                 } /* for each tcb */
3875         }
3876         return (0);
3877 }
3878
3879 /*
3880  * Add the addr to the TCB local address list
3881  * For the BOUNDALL or dynamic case, this is a "pending" address list
3882  * (eg. addresses waiting for an ASCONF-ACK response)
3883  * For the subset binding, static case, this is a "valid" address list
3884  */
3885 int
3886 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3887 {
3888         struct sctp_inpcb *inp;
3889         struct sctp_laddr *laddr;
3890         int error;
3891
3892         /* Assumes TCP is locked.. and possiblye
3893          * the INP. May need to confirm/fix that if
3894          * we need it and is not the case.
3895          */
3896         inp = stcb->sctp_ep;
3897         if (ifa->ifa_addr->sa_family == AF_INET6) {
3898                 struct in6_ifaddr *ifa6;
3899                 ifa6 = (struct in6_ifaddr *)ifa;
3900                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3901                     /* IN6_IFF_DEPRECATED | */
3902                     IN6_IFF_ANYCAST |
3903                     IN6_IFF_NOTREADY))
3904                         /* Can't bind a non-existent addr. */
3905                         return (-1);
3906         }
3907         /* does the address already exist? */
3908         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3909                 if (laddr->ifa == ifa) {
3910                         return (-1);
3911                 }
3912         }
3913
3914         /* add to the list */
3915         error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
3916         if (error != 0)
3917                 return (error);
3918         return (0);
3919 }
3920
3921 /*
3922  * insert an laddr entry with the given ifa for the desired list
3923  */
3924 int
3925 sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa) {
3926         struct sctp_laddr *laddr;
3927         int s;
3928
3929 #if defined(__NetBSD__) || defined(__OpenBSD__)
3930         s = splsoftnet();
3931 #else
3932         s = splnet();
3933 #endif
3934
3935         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
3936         if (laddr == NULL) {
3937                 /* out of memory? */
3938                 splx(s);
3939                 return (EINVAL);
3940         }
3941         sctppcbinfo.ipi_count_laddr++;
3942         sctppcbinfo.ipi_gencnt_laddr++;
3943         bzero(laddr, sizeof(*laddr));
3944         laddr->ifa = ifa;
3945         /* insert it */
3946         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
3947
3948         splx(s);
3949         return (0);
3950 }
3951
3952 /*
3953  * Remove an laddr entry from the local address list (on an assoc)
3954  */
3955 void
3956 sctp_remove_laddr(struct sctp_laddr *laddr)
3957 {
3958         int s;
3959 #if defined(__NetBSD__) || defined(__OpenBSD__)
3960         s = splsoftnet();
3961 #else
3962         s = splnet();
3963 #endif
3964         /* remove from the list */
3965         LIST_REMOVE(laddr, sctp_nxt_addr);
3966         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3967         sctppcbinfo.ipi_count_laddr--;
3968         sctppcbinfo.ipi_gencnt_laddr++;
3969
3970         splx(s);
3971 }
3972
3973 /*
3974  * Remove an address from the TCB local address list
3975  */
3976 int
3977 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3978 {
3979         struct sctp_inpcb *inp;
3980         struct sctp_laddr *laddr;
3981
3982         /* This is called by asconf work. It is assumed that
3983          * a) The TCB is locked
3984          * and
3985          * b) The INP is locked.
3986          * This is true in as much as I can trace through
3987          * the entry asconf code where I did these locks.
3988          * Again, the ASCONF code is a bit different in
3989          * that it does lock the INP during its work often
3990          * times. This must be since we don't want other
3991          * proc's looking up things while what they are
3992          * looking up is changing :-D
3993          */
3994
3995         inp = stcb->sctp_ep;
3996         /* if subset bound and don't allow ASCONF's, can't delete last */
3997         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
3998             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
3999                 if (stcb->asoc.numnets < 2) {
4000                         /* can't delete last address */
4001                         return (-1);
4002                 }
4003         }
4004
4005         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4006                 /* remove the address if it exists */
4007                 if (laddr->ifa == NULL)
4008                         continue;
4009                 if (laddr->ifa == ifa) {
4010                         sctp_remove_laddr(laddr);
4011                         return (0);
4012                 }
4013         }
4014
4015         /* address not found! */
4016         return (-1);
4017 }
4018
4019 /*
4020  * Remove an address from the TCB local address list
4021  * lookup using a sockaddr addr
4022  */
4023 int
4024 sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
4025 {
4026         struct sctp_inpcb *inp;
4027         struct sctp_laddr *laddr;
4028         struct sockaddr *l_sa;
4029
4030         /*
4031          * This function I find does not seem to have a caller.
4032          * As such we NEED TO DELETE this code. If we do
4033          * find a caller, the caller MUST have locked the TCB
4034          * at the least and probably the INP as well.
4035          */
4036         inp = stcb->sctp_ep;
4037         /* if subset bound and don't allow ASCONF's, can't delete last */
4038         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4039             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4040                 if (stcb->asoc.numnets < 2) {
4041                         /* can't delete last address */
4042                         return (-1);
4043                 }
4044         }
4045
4046         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4047                 /* make sure the address exists */
4048                 if (laddr->ifa == NULL)
4049                         continue;
4050                 if (laddr->ifa->ifa_addr == NULL)
4051                         continue;
4052
4053                 l_sa = laddr->ifa->ifa_addr;
4054                 if (l_sa->sa_family == AF_INET6) {
4055                         /* IPv6 address */
4056                         struct sockaddr_in6 *sin1, *sin2;
4057                         sin1 = (struct sockaddr_in6 *)l_sa;
4058                         sin2 = (struct sockaddr_in6 *)sa;
4059                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4060                             sizeof(struct in6_addr)) == 0) {
4061                                 /* matched */
4062                                 sctp_remove_laddr(laddr);
4063                                 return (0);
4064                         }
4065                 } else if (l_sa->sa_family == AF_INET) {
4066                         /* IPv4 address */
4067                         struct sockaddr_in *sin1, *sin2;
4068                         sin1 = (struct sockaddr_in *)l_sa;
4069                         sin2 = (struct sockaddr_in *)sa;
4070                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4071                                 /* matched */
4072                                 sctp_remove_laddr(laddr);
4073                                 return (0);
4074                         }
4075                 } else {
4076                         /* invalid family */
4077                         return (-1);
4078                 }
4079         } /* end foreach */
4080         /* address not found! */
4081         return (-1);
4082 }
4083
4084 static char sctp_pcb_initialized = 0;
4085
4086 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4087 /* sysctl */
4088 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4089 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4090
4091 #endif /* FreeBSD || APPLE || DragonFly */
4092
4093 #ifndef SCTP_TCBHASHSIZE
4094 #define SCTP_TCBHASHSIZE 1024
4095 #endif
4096
4097 #ifndef SCTP_CHUNKQUEUE_SCALE
4098 #define SCTP_CHUNKQUEUE_SCALE 10
4099 #endif
4100
4101 void
4102 sctp_pcb_init()
4103 {
4104         /*
4105          * SCTP initialization for the PCB structures
4106          * should be called by the sctp_init() funciton.
4107          */
4108         int i;
4109         int hashtblsize = SCTP_TCBHASHSIZE;
4110
4111 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4112         int sctp_chunkscale = SCTP_CHUNKQUEUE_SCALE;
4113 #endif
4114
4115         if (sctp_pcb_initialized != 0) {
4116                 /* error I was called twice */
4117                 return;
4118         }
4119         sctp_pcb_initialized = 1;
4120
4121         /* Init all peg counts */
4122         for (i = 0; i < SCTP_NUMBER_OF_PEGS; i++) {
4123                 sctp_pegs[i] = 0;
4124         }
4125
4126         /* init the empty list of (All) Endpoints */
4127         LIST_INIT(&sctppcbinfo.listhead);
4128
4129         /* init the iterator head */
4130         LIST_INIT(&sctppcbinfo.iteratorhead);
4131
4132         /* init the hash table of endpoints */
4133 #if defined(__FreeBSD__)
4134 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
4135         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &hashtblsize);
4136         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4137         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4138 #else
4139         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
4140             hashtblsize);
4141         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
4142             sctp_pcbtblsize);
4143         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
4144             sctp_chunkscale);
4145 #endif
4146 #endif
4147
4148         sctppcbinfo.sctp_asochash = hashinit((hashtblsize * 31),
4149 #ifdef __NetBSD__
4150             HASH_LIST,
4151 #endif
4152             M_PCB,
4153 #if defined(__NetBSD__) || defined(__OpenBSD__)
4154             M_WAITOK,
4155 #endif
4156             &sctppcbinfo.hashasocmark);
4157
4158         sctppcbinfo.sctp_ephash = hashinit(hashtblsize,
4159 #ifdef __NetBSD__
4160             HASH_LIST,
4161 #endif
4162             M_PCB,
4163 #if defined(__NetBSD__) || defined(__OpenBSD__)
4164             M_WAITOK,
4165 #endif
4166             &sctppcbinfo.hashmark);
4167
4168         sctppcbinfo.sctp_tcpephash = hashinit(hashtblsize,
4169 #ifdef __NetBSD__
4170             HASH_LIST,
4171 #endif
4172             M_PCB,
4173 #if defined(__NetBSD__) || defined(__OpenBSD__)
4174             M_WAITOK,
4175 #endif
4176             &sctppcbinfo.hashtcpmark);
4177
4178         sctppcbinfo.hashtblsize = hashtblsize;
4179
4180         /* init the zones */
4181         /*
4182          * FIX ME: Should check for NULL returns, but if it does fail we
4183          * are doomed to panic anyways... add later maybe.
4184          */
4185         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4186             sizeof(struct sctp_inpcb), maxsockets);
4187
4188         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4189             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4190
4191         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4192             sizeof(struct sctp_laddr),
4193             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4194
4195         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4196             sizeof(struct sctp_nets),
4197             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4198
4199         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4200             sizeof(struct sctp_tmit_chunk),
4201             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4202             sctp_chunkscale));
4203
4204         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_sockq, "sctp_sockq",
4205             sizeof(struct sctp_socket_q_list),
4206             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4207             sctp_chunkscale));
4208
4209         /* Master Lock INIT for info structure */
4210         SCTP_INP_INFO_LOCK_INIT();
4211         SCTP_ITERATOR_LOCK_INIT();
4212         /* not sure if we need all the counts */
4213         sctppcbinfo.ipi_count_ep = 0;
4214         sctppcbinfo.ipi_gencnt_ep = 0;
4215         /* assoc/tcb zone info */
4216         sctppcbinfo.ipi_count_asoc = 0;
4217         sctppcbinfo.ipi_gencnt_asoc = 0;
4218         /* local addrlist zone info */
4219         sctppcbinfo.ipi_count_laddr = 0;
4220         sctppcbinfo.ipi_gencnt_laddr = 0;
4221         /* remote addrlist zone info */
4222         sctppcbinfo.ipi_count_raddr = 0;
4223         sctppcbinfo.ipi_gencnt_raddr = 0;
4224         /* chunk info */
4225         sctppcbinfo.ipi_count_chunk = 0;
4226         sctppcbinfo.ipi_gencnt_chunk = 0;
4227
4228         /* socket queue zone info */
4229         sctppcbinfo.ipi_count_sockq = 0;
4230         sctppcbinfo.ipi_gencnt_sockq = 0;
4231
4232         /* mbuf tracker */
4233         sctppcbinfo.mbuf_track = 0;
4234         /* port stuff */
4235 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) \
4236     || defined(__DragonFly__)
4237         sctppcbinfo.lastlow = ipport_firstauto;
4238 #else
4239         sctppcbinfo.lastlow = anonportmin;
4240 #endif
4241         /* Init the TIMEWAIT list */
4242         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4243                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4244         }
4245
4246 #if defined(_SCTP_NEEDS_CALLOUT_) && !defined(__APPLE__)
4247         TAILQ_INIT(&sctppcbinfo.callqueue);
4248 #endif
4249
4250 }
4251
4252 int
4253 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4254     int iphlen, int offset, int limit, struct sctphdr *sh,
4255     struct sockaddr *altsa)
4256 {
4257         /*
4258          * grub through the INIT pulling addresses and
4259          * loading them to the nets structure in the asoc.
4260          * The from address in the mbuf should also be loaded
4261          * (if it is not already). This routine can be called
4262          * with either INIT or INIT-ACK's as long as the
4263          * m points to the IP packet and the offset points
4264          * to the beginning of the parameters.
4265          */
4266         struct sctp_inpcb *inp, *l_inp;
4267         struct sctp_nets *net, *net_tmp;
4268         struct ip *iph;
4269         struct sctp_paramhdr *phdr, parm_buf;
4270         struct sctp_tcb *stcb_tmp;
4271         u_int16_t ptype, plen;
4272         struct sockaddr *sa;
4273         struct sockaddr_storage dest_store;
4274         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4275         struct sockaddr_in sin;
4276         struct sockaddr_in6 sin6;
4277
4278         /* First get the destination address setup too. */
4279         memset(&sin, 0, sizeof(sin));
4280         memset(&sin6, 0, sizeof(sin6));
4281
4282         sin.sin_family = AF_INET;
4283         sin.sin_len = sizeof(sin);
4284         sin.sin_port = stcb->rport;
4285
4286         sin6.sin6_family = AF_INET6;
4287         sin6.sin6_len = sizeof(struct sockaddr_in6);
4288         sin6.sin6_port = stcb->rport;
4289         if (altsa == NULL) {
4290                 iph = mtod(m, struct ip *);
4291                 if (iph->ip_v == IPVERSION) {
4292                         /* its IPv4 */
4293                         struct sockaddr_in *sin_2;
4294                         sin_2 = (struct sockaddr_in *)(local_sa);
4295                         memset(sin_2, 0, sizeof(sin));
4296                         sin_2->sin_family = AF_INET;
4297                         sin_2->sin_len = sizeof(sin);
4298                         sin_2->sin_port = sh->dest_port;
4299                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr ;
4300                         sin.sin_addr = iph->ip_src;
4301                         sa = (struct sockaddr *)&sin;
4302                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4303                         /* its IPv6 */
4304                         struct ip6_hdr *ip6;
4305                         struct sockaddr_in6 *sin6_2;
4306
4307                         ip6 = mtod(m, struct ip6_hdr *);
4308                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4309                         memset(sin6_2, 0, sizeof(sin6));
4310                         sin6_2->sin6_family = AF_INET6;
4311                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4312                         sin6_2->sin6_port = sh->dest_port;
4313                         sin6.sin6_addr = ip6->ip6_src;
4314                         sa = (struct sockaddr *)&sin6;
4315                 } else {
4316                         sa = NULL;
4317                 }
4318         } else {
4319                 /*
4320                  * For cookies we use the src address NOT from the packet
4321                  * but from the original INIT
4322                  */
4323                 sa = altsa;
4324         }
4325         /* Turn off ECN until we get through all params */
4326         stcb->asoc.ecn_allowed = 0;
4327
4328         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4329                 /* mark all addresses that we have currently on the list */
4330                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4331         }
4332         /* does the source address already exist? if so skip it */
4333         l_inp = inp = stcb->sctp_ep;
4334         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4335         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4336                 /* we must add the source address */
4337                 /* no scope set here since we have a tcb already. */
4338                 if ((sa->sa_family == AF_INET) &&
4339                     (stcb->asoc.ipv4_addr_legal)) {
4340                         if (sctp_add_remote_addr(stcb, sa, 0, 2)) {
4341                                 return (-1);
4342                         }
4343                 } else if ((sa->sa_family == AF_INET6) &&
4344                     (stcb->asoc.ipv6_addr_legal)) {
4345                         if (sctp_add_remote_addr(stcb, sa, 0, 3)) {
4346                                 return (-1);
4347                         }
4348                 }
4349         } else {
4350                 if (net_tmp != NULL && stcb_tmp == stcb) {
4351                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4352                 } else if (stcb_tmp != stcb) {
4353                         /* It belongs to another association? */
4354                         return (-1);
4355                 }
4356         }
4357         /* since a unlock occured we must check the
4358          * TCB's state and the pcb's gone flags.
4359          */
4360         if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4361                 /* the user freed the ep */
4362                 return (-1);
4363         }
4364         if (stcb->asoc.state == 0) {
4365                 /* the assoc was freed? */
4366                 return (-1);
4367         }
4368
4369         /* now we must go through each of the params. */
4370         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4371         while (phdr) {
4372                 ptype = ntohs(phdr->param_type);
4373                 plen = ntohs(phdr->param_length);
4374                 /*printf("ptype => %d, plen => %d\n", ptype, plen);*/
4375                 if (offset + plen > limit) {
4376                         break;
4377                 }
4378                 if (plen == 0) {
4379                         break;
4380                 }
4381                 if ((ptype == SCTP_IPV4_ADDRESS) &&
4382                     (stcb->asoc.ipv4_addr_legal)) {
4383                         struct sctp_ipv4addr_param *p4, p4_buf;
4384                         /* ok get the v4 address and check/add */
4385                         phdr = sctp_get_next_param(m, offset,
4386                             (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4387                         if (plen != sizeof(struct sctp_ipv4addr_param) ||
4388                             phdr == NULL) {
4389                                 return (-1);
4390                         }
4391                         p4 = (struct sctp_ipv4addr_param *)phdr;
4392                         sin.sin_addr.s_addr = p4->addr;
4393                         sa = (struct sockaddr *)&sin;
4394                         inp = stcb->sctp_ep;
4395                         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4396                             local_sa, stcb);
4397
4398                         if ((stcb_tmp== NULL && inp == stcb->sctp_ep) ||
4399                             inp == NULL) {
4400                                 /* we must add the source address */
4401                                 /* no scope set since we have a tcb already */
4402
4403                                 /* we must validate the state again here */
4404                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4405                                         /* the user freed the ep */
4406                                         return (-1);
4407                                 }
4408                                 if (stcb->asoc.state == 0) {
4409                                         /* the assoc was freed? */
4410                                         return (-1);
4411                                 }
4412                                 if (sctp_add_remote_addr(stcb, sa, 0, 4)) {
4413                                         return (-1);
4414                                 }
4415                         } else if (stcb_tmp == stcb) {
4416                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4417                                         /* the user freed the ep */
4418                                         return (-1);
4419                                 }
4420                                 if (stcb->asoc.state == 0) {
4421                                         /* the assoc was freed? */
4422                                         return (-1);
4423                                 }
4424                                 if (net != NULL) {
4425                                         /* clear flag */
4426                                         net->dest_state &=
4427                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4428                                 }
4429                         } else {
4430                                 /* strange, address is in another assoc?
4431                                  * straighten out locks.
4432                                  */
4433                                 SCTP_TCB_UNLOCK(stcb_tmp);
4434                                 SCTP_INP_RLOCK(inp);
4435                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4436                                         /* the user freed the ep */
4437                                         SCTP_INP_RUNLOCK(l_inp);
4438                                         return (-1);
4439                                 }
4440                                 if (stcb->asoc.state == 0) {
4441                                         /* the assoc was freed? */
4442                                         SCTP_INP_RUNLOCK(l_inp);
4443                                         return (-1);
4444                                 }
4445                                 SCTP_TCB_LOCK(stcb);
4446                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
4447                                 return (-1);
4448                         }
4449                 } else if ((ptype == SCTP_IPV6_ADDRESS) &&
4450                     (stcb->asoc.ipv6_addr_legal)) {
4451                         /* ok get the v6 address and check/add */
4452                         struct sctp_ipv6addr_param *p6, p6_buf;
4453                         phdr = sctp_get_next_param(m, offset,
4454                             (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4455                         if (plen != sizeof(struct sctp_ipv6addr_param) ||
4456                             phdr == NULL) {
4457                                 return (-1);
4458                         }
4459                         p6 = (struct sctp_ipv6addr_param *)phdr;
4460                         memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4461                             sizeof(p6->addr));
4462                         sa = (struct sockaddr *)&sin6;
4463                         inp = stcb->sctp_ep;
4464                         stcb_tmp= sctp_findassociation_ep_addr(&inp, sa, &net,
4465                             local_sa, stcb);
4466                         if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4467                             inp == NULL)) {
4468                                 /* we must validate the state again here */
4469                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4470                                         /* the user freed the ep */
4471                                         return (-1);
4472                                 }
4473                                 if (stcb->asoc.state == 0) {
4474                                         /* the assoc was freed? */
4475                                         return (-1);
4476                                 }
4477                                 /* we must add the address, no scope set */
4478                                 if (sctp_add_remote_addr(stcb, sa, 0, 5)) {
4479                                         return (-1);
4480                                 }
4481                         } else if (stcb_tmp == stcb) {
4482                                 /* we must validate the state again here */
4483                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4484                                         /* the user freed the ep */
4485                                         return (-1);
4486                                 }
4487                                 if (stcb->asoc.state == 0) {
4488                                         /* the assoc was freed? */
4489                                         return (-1);
4490                                 }
4491                                 if (net != NULL) {
4492                                         /* clear flag */
4493                                         net->dest_state &=
4494                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4495                                 }
4496                         } else {
4497                                 /* strange, address is in another assoc?
4498                                  * straighten out locks.
4499                                  */
4500                                 SCTP_TCB_UNLOCK(stcb_tmp);
4501                                 SCTP_INP_RLOCK(l_inp);
4502                                 /* we must validate the state again here */
4503                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4504                                         /* the user freed the ep */
4505                                         SCTP_INP_RUNLOCK(l_inp);
4506                                         return (-1);
4507                                 }
4508                                 if (stcb->asoc.state == 0) {
4509                                         /* the assoc was freed? */
4510                                         SCTP_INP_RUNLOCK(l_inp);
4511                                         return (-1);
4512                                 }
4513                                 SCTP_TCB_LOCK(stcb);
4514                                 SCTP_INP_RUNLOCK(l_inp);
4515                                 return (-1);
4516                         }
4517                 } else if (ptype == SCTP_ECN_CAPABLE) {
4518                         stcb->asoc.ecn_allowed = 1;
4519                 } else if (ptype == SCTP_ULP_ADAPTION) {
4520                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
4521                                 struct sctp_adaption_layer_indication ai, *aip;
4522
4523                                 phdr = sctp_get_next_param(m, offset,
4524                                                            (struct sctp_paramhdr *)&ai, sizeof(ai));
4525                                 aip = (struct sctp_adaption_layer_indication *)phdr;
4526                                 sctp_ulp_notify(SCTP_NOTIFY_ADAPTION_INDICATION,
4527                                                 stcb, ntohl(aip->indication), NULL);
4528                         }
4529                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4530                         struct sctp_asconf_addr_param lstore, *fee;
4531                         struct sctp_asconf_addrv4_param *fii;
4532                         int lptype;
4533                         struct sockaddr *lsa = NULL;
4534
4535                         stcb->asoc.peer_supports_asconf = 1;
4536                         stcb->asoc.peer_supports_asconf_setprim = 1;
4537                         if (plen > sizeof(lstore)) {
4538                                 return (-1);
4539                         }
4540                         phdr = sctp_get_next_param(m, offset,
4541                             (struct sctp_paramhdr *)&lstore, plen);
4542                         if (phdr == NULL) {
4543                                 return (-1);
4544                         }
4545
4546                         fee  = (struct sctp_asconf_addr_param *)phdr;
4547                         lptype = ntohs(fee->addrp.ph.param_type);
4548                         if (lptype == SCTP_IPV4_ADDRESS) {
4549                                 if (plen !=
4550                                     sizeof(struct sctp_asconf_addrv4_param)) {
4551                                         printf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4552                                            (int)sizeof(struct sctp_asconf_addrv4_param),
4553                                            plen);
4554                                 } else {
4555                                         fii = (struct sctp_asconf_addrv4_param *)fee;
4556                                         sin.sin_addr.s_addr = fii->addrp.addr;
4557                                         lsa = (struct sockaddr *)&sin;
4558                                 }
4559                         } else if (lptype == SCTP_IPV6_ADDRESS) {
4560                                 if (plen !=
4561                                     sizeof(struct sctp_asconf_addr_param)) {
4562                                         printf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4563                                            (int)sizeof(struct sctp_asconf_addr_param),
4564                                            plen);
4565                                 } else {
4566                                         memcpy(sin6.sin6_addr.s6_addr,
4567                                             fee->addrp.addr,
4568                                             sizeof(fee->addrp.addr));
4569                                         lsa = (struct sockaddr *)&sin6;
4570                                 }
4571                         }
4572                         if (lsa) {
4573                                 sctp_set_primary_addr(stcb, sa, NULL);
4574                         }
4575
4576                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4577                         /* Peer supports pr-sctp */
4578                         stcb->asoc.peer_supports_prsctp = 1;
4579                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4580                         /* A supported extension chunk */
4581                         struct sctp_supported_chunk_types_param *pr_supported;
4582                         uint8_t local_store[128];
4583                         int num_ent, i;
4584
4585                         phdr = sctp_get_next_param(m, offset,
4586                             (struct sctp_paramhdr *)&local_store, plen);
4587                         if (phdr == NULL) {
4588                                 return (-1);
4589                         }
4590                         stcb->asoc.peer_supports_asconf = 0;
4591                         stcb->asoc.peer_supports_asconf_setprim = 0;
4592                         stcb->asoc.peer_supports_prsctp = 0;
4593                         stcb->asoc.peer_supports_pktdrop = 0;
4594                         stcb->asoc.peer_supports_strreset = 0;
4595                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4596                         num_ent = plen - sizeof(struct sctp_paramhdr);
4597                         for (i=0; i<num_ent; i++) {
4598                                 switch (pr_supported->chunk_types[i]) {
4599                                 case SCTP_ASCONF:
4600                                         stcb->asoc.peer_supports_asconf = 1;
4601                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4602                                         break;
4603                                 case SCTP_ASCONF_ACK:
4604                                         stcb->asoc.peer_supports_asconf = 1;
4605                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4606                                         break;
4607                                 case SCTP_FORWARD_CUM_TSN:
4608                                         stcb->asoc.peer_supports_prsctp = 1;
4609                                         break;
4610                                 case SCTP_PACKET_DROPPED:
4611                                         stcb->asoc.peer_supports_pktdrop = 1;
4612                                         break;
4613                                 case SCTP_STREAM_RESET:
4614                                         stcb->asoc.peer_supports_strreset = 1;
4615                                         break;
4616                                 default:
4617                                         /* one I have not learned yet */
4618                                         break;
4619
4620                                 }
4621                         }
4622                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4623                         /* Peer supports ECN-nonce */
4624                         stcb->asoc.peer_supports_ecn_nonce = 1;
4625                         stcb->asoc.ecn_nonce_allowed = 1;
4626                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4627                            (ptype == SCTP_STATE_COOKIE) ||
4628                            (ptype == SCTP_UNRECOG_PARAM) ||
4629                            (ptype == SCTP_COOKIE_PRESERVE) ||
4630                            (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4631                            (ptype == SCTP_ADD_IP_ADDRESS) ||
4632                            (ptype == SCTP_DEL_IP_ADDRESS) ||
4633                            (ptype == SCTP_ERROR_CAUSE_IND) ||
4634                            (ptype == SCTP_SUCCESS_REPORT)) {
4635                         /* don't care */;
4636                 } else {
4637                         if ((ptype & 0x8000) == 0x0000) {
4638                                 /* must stop processing the rest of
4639                                  * the param's. Any report bits were
4640                                  * handled with the call to sctp_arethere_unrecognized_parameters()
4641                                  * when the INIT or INIT-ACK was first seen.
4642                                  */
4643                                 break;
4644                         }
4645                 }
4646                 offset += SCTP_SIZE32(plen);
4647                 if (offset >= limit) {
4648                         break;
4649                 }
4650                 phdr = sctp_get_next_param(m, offset, &parm_buf,
4651                     sizeof(parm_buf));
4652         }
4653         /* Now check to see if we need to purge any addresses */
4654         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
4655                 net_tmp = TAILQ_NEXT(net, sctp_next);
4656                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
4657                     SCTP_ADDR_NOT_IN_ASSOC) {
4658                         /* This address has been removed from the asoc */
4659                         /* remove and free it */
4660                         stcb->asoc.numnets--;
4661                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
4662                         sctp_free_remote_addr(net);
4663                         if (net == stcb->asoc.primary_destination) {
4664                                 stcb->asoc.primary_destination = NULL;
4665                                 sctp_select_primary_destination(stcb);
4666                         }
4667                 }
4668         }
4669         return (0);
4670 }
4671
4672 int
4673 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
4674     struct sctp_nets *net)
4675 {
4676         /* make sure the requested primary address exists in the assoc */
4677         if (net == NULL && sa)
4678                 net = sctp_findnet(stcb, sa);
4679
4680         if (net == NULL) {
4681                 /* didn't find the requested primary address! */
4682                 return (-1);
4683         } else {
4684                 /* set the primary address */
4685                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
4686                         /* Must be confirmed */
4687                         return (-1);
4688                 }
4689                 stcb->asoc.primary_destination = net;
4690                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
4691                 return (0);
4692         }
4693 }
4694
4695
4696 int
4697 sctp_is_vtag_good(struct sctp_inpcb *inp, u_int32_t tag, struct timeval *now)
4698 {
4699         /*
4700          * This function serves two purposes. It will see if a TAG can be
4701          * re-used and return 1 for yes it is ok and 0 for don't use that
4702          * tag.
4703          * A secondary function it will do is purge out old tags that can
4704          * be removed.
4705          */
4706         struct sctpasochead *head;
4707         struct sctpvtaghead *chain;
4708         struct sctp_tagblock *twait_block;
4709         struct sctp_tcb *stcb;
4710
4711         int i;
4712         SCTP_INP_INFO_WLOCK();
4713         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4714         /* First is the vtag in use ? */
4715
4716         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
4717             sctppcbinfo.hashasocmark)];
4718         if (head == NULL) {
4719                 SCTP_INP_INFO_WUNLOCK();
4720                 return (0);
4721         }
4722         LIST_FOREACH(stcb, head, sctp_asocs) {
4723                 if (stcb->asoc.my_vtag == tag) {
4724                         /* We should remove this if and
4725                          * return 0 always if we want vtags
4726                          * unique across all endpoints. For
4727                          * now within a endpoint is ok.
4728                          */
4729                         if (inp == stcb->sctp_ep) {
4730                                 /* bad tag, in use */
4731                                 SCTP_INP_INFO_WUNLOCK();
4732                                 return (0);
4733                         }
4734                 }
4735         }
4736         if (!LIST_EMPTY(chain)) {
4737                 /*
4738                  * Block(s) are present, lets see if we have this tag in
4739                  * the list
4740                  */
4741                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4742                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4743                                 if (twait_block->vtag_block[i].v_tag == 0) {
4744                                         /* not used */
4745                                         continue;
4746                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
4747                                     now->tv_sec) {
4748                                         /* Audit expires this guy */
4749                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4750                                         twait_block->vtag_block[i].v_tag = 0;
4751                                 } else if (twait_block->vtag_block[i].v_tag ==
4752                                     tag) {
4753                                         /* Bad tag, sorry :< */
4754                                         SCTP_INP_INFO_WUNLOCK();
4755                                         return (0);
4756                                 }
4757                         }
4758                 }
4759         }
4760         /* Not found, ok to use the tag */
4761         SCTP_INP_INFO_WUNLOCK();
4762         return (1);
4763 }
4764
4765
4766 /*
4767  * Delete the address from the endpoint local address list
4768  * Lookup using a sockaddr address (ie. not an ifaddr)
4769  */
4770 int
4771 sctp_del_local_addr_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa)
4772 {
4773         struct sctp_laddr *laddr;
4774         struct sockaddr *l_sa;
4775         int found = 0;
4776         /* Here is another function I cannot find a
4777          * caller for. As such we SHOULD delete it
4778          * if we have no users. If we find a user that
4779          * user MUST have the INP locked.
4780          *
4781          */
4782
4783         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4784                 /* You are already bound to all. You have it already */
4785                 return (EINVAL);
4786         }
4787
4788         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4789                 /* make sure the address exists */
4790                 if (laddr->ifa == NULL)
4791                         continue;
4792                 if (laddr->ifa->ifa_addr == NULL)
4793                         continue;
4794
4795                 l_sa = laddr->ifa->ifa_addr;
4796                 if (l_sa->sa_family == AF_INET6) {
4797                         /* IPv6 address */
4798                         struct sockaddr_in6 *sin1, *sin2;
4799                         sin1 = (struct sockaddr_in6 *)l_sa;
4800                         sin2 = (struct sockaddr_in6 *)sa;
4801                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4802                             sizeof(struct in6_addr)) == 0) {
4803                                 /* matched */
4804                                 found = 1;
4805                                 break;
4806                         }
4807                 } else if (l_sa->sa_family == AF_INET) {
4808                         /* IPv4 address */
4809                         struct sockaddr_in *sin1, *sin2;
4810                         sin1 = (struct sockaddr_in *)l_sa;
4811                         sin2 = (struct sockaddr_in *)sa;
4812                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4813                                 /* matched */
4814                                 found = 1;
4815                                 break;
4816                         }
4817                 } else {
4818                         /* invalid family */
4819                         return (-1);
4820                 }
4821         }
4822
4823         if (found && inp->laddr_count < 2) {
4824                 /* can't delete unless there are at LEAST 2 addresses */
4825                 return (-1);
4826         }
4827
4828         if (found && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
4829                 /*
4830                  * remove it from the ep list, this should NOT be
4831                  * done until its really gone from the interface list and
4832                  * we won't be receiving more of these. Probably right
4833                  * away. If we do allow a removal of an address from
4834                  * an association (sub-set bind) than this should NOT
4835                  * be called until the all ASCONF come back from this
4836                  * association.
4837                  */
4838                 sctp_remove_laddr(laddr);
4839                 return (0);
4840         } else {
4841                 return (-1);
4842         }
4843 }
4844
4845 static void
4846 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4847 {
4848         /*
4849          * We must hunt this association for MBUF's past the cumack
4850          * (i.e. out of order data that we can renege on).
4851          */
4852         struct sctp_association *asoc;
4853         struct sctp_tmit_chunk *chk, *nchk;
4854         u_int32_t cumulative_tsn_p1, tsn;
4855         int cnt, strmat, gap;
4856         /* We look for anything larger than the cum-ack + 1 */
4857
4858         asoc = &stcb->asoc;
4859         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
4860         cnt = 0;
4861         /* First look in the re-assembly queue */
4862         chk = TAILQ_FIRST(&asoc->reasmqueue);
4863         while (chk) {
4864                 /* Get the next one */
4865                 nchk = TAILQ_NEXT(chk, sctp_next);
4866                 if (compare_with_wrap(chk->rec.data.TSN_seq,
4867                     cumulative_tsn_p1, MAX_TSN)) {
4868                         /* Yep it is above cum-ack */
4869                         cnt++;
4870                         tsn = chk->rec.data.TSN_seq;
4871                         if (tsn >= asoc->mapping_array_base_tsn) {
4872                                 gap  = tsn - asoc->mapping_array_base_tsn;
4873                         } else {
4874                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
4875                                     tsn + 1;
4876                         }
4877                         asoc->size_on_reasm_queue -= chk->send_size;
4878                         asoc->cnt_on_reasm_queue--;
4879                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
4880                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4881                         if (chk->data) {
4882                                 sctp_m_freem(chk->data);
4883                                 chk->data = NULL;
4884                         }
4885                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4886                         sctppcbinfo.ipi_count_chunk--;
4887                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4888                                 panic("Chunk count is negative");
4889                         }
4890                         sctppcbinfo.ipi_gencnt_chunk++;
4891                 }
4892                 chk = nchk;
4893         }
4894         /* Ok that was fun, now we will drain all the inbound streams? */
4895         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
4896                 chk = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
4897                 while (chk) {
4898                         nchk = TAILQ_NEXT(chk, sctp_next);
4899                         if (compare_with_wrap(chk->rec.data.TSN_seq,
4900                             cumulative_tsn_p1, MAX_TSN)) {
4901                                 /* Yep it is above cum-ack */
4902                                 cnt++;
4903                                 tsn = chk->rec.data.TSN_seq;
4904                                 if (tsn >= asoc->mapping_array_base_tsn) {
4905                                         gap = tsn -
4906                                             asoc->mapping_array_base_tsn;
4907                                 } else {
4908                                         gap = (MAX_TSN -
4909                                             asoc->mapping_array_base_tsn) +
4910                                             tsn + 1;
4911                                 }
4912                                 asoc->size_on_all_streams -= chk->send_size;
4913                                 asoc->cnt_on_all_streams--;
4914
4915                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
4916                                     gap);
4917                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
4918                                     chk, sctp_next);
4919                                 if (chk->data) {
4920                                         sctp_m_freem(chk->data);
4921                                         chk->data = NULL;
4922                                 }
4923                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4924                                 sctppcbinfo.ipi_count_chunk--;
4925                                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4926                                         panic("Chunk count is negative");
4927                                 }
4928                                 sctppcbinfo.ipi_gencnt_chunk++;
4929                         }
4930                         chk = nchk;
4931                 }
4932         }
4933         /*
4934          * Question, should we go through the delivery queue?
4935          * The only reason things are on here is the app not reading OR a
4936          * p-d-api up. An attacker COULD send enough in to initiate the
4937          * PD-API and then send a bunch of stuff to other streams... these
4938          * would wind up on the delivery queue.. and then we would not get
4939          * to them. But in order to do this I then have to back-track and
4940          * un-deliver sequence numbers in streams.. el-yucko. I think for
4941          * now we will NOT look at the delivery queue and leave it to be
4942          * something to consider later. An alternative would be to abort
4943          * the P-D-API with a notification and then deliver the data....
4944          * Or another method might be to keep track of how many times the
4945          * situation occurs and if we see a possible attack underway just
4946          * abort the association.
4947          */
4948 #ifdef SCTP_DEBUG
4949         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
4950                 if (cnt) {
4951                         printf("Freed %d chunks from reneg harvest\n", cnt);
4952                 }
4953         }
4954 #endif /* SCTP_DEBUG */
4955
4956         /*
4957          * Another issue, in un-setting the TSN's in the mapping array we
4958          * DID NOT adjust the higest_tsn marker.  This will cause one of
4959          * two things to occur. It may cause us to do extra work in checking
4960          * for our mapping array movement. More importantly it may cause us
4961          * to SACK every datagram. This may not be a bad thing though since
4962          * we will recover once we get our cum-ack above and all this stuff
4963          * we dumped recovered.
4964          */
4965 }
4966
4967 void
4968 sctp_drain()
4969 {
4970         /*
4971          * We must walk the PCB lists for ALL associations here. The system
4972          * is LOW on MBUF's and needs help. This is where reneging will
4973          * occur. We really hope this does NOT happen!
4974          */
4975         struct sctp_inpcb *inp;
4976         struct sctp_tcb *stcb;
4977
4978         SCTP_INP_INFO_RLOCK();
4979         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
4980                 /* For each endpoint */
4981                 SCTP_INP_RLOCK(inp);
4982                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4983                         /* For each association */
4984                         SCTP_TCB_LOCK(stcb);
4985                         sctp_drain_mbufs(inp, stcb);
4986                         SCTP_TCB_UNLOCK(stcb);
4987                 }
4988                 SCTP_INP_RUNLOCK(inp);
4989         }
4990         SCTP_INP_INFO_RUNLOCK();
4991 }
4992
4993 int
4994 sctp_add_to_socket_q(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4995 {
4996         struct sctp_socket_q_list *sq;
4997
4998         /* write lock on INP assumed */
4999         if ((inp == NULL) || (stcb == NULL)) {
5000                 /* I am paranoid */
5001                 return (0);
5002         }
5003         sq = (struct sctp_socket_q_list *)SCTP_ZONE_GET(
5004             sctppcbinfo.ipi_zone_sockq);
5005         if (sq == NULL) {
5006                 /* out of sq structs */
5007                 return (0);
5008         }
5009         sctppcbinfo.ipi_count_sockq++;
5010         sctppcbinfo.ipi_gencnt_sockq++;
5011         if (stcb)
5012                 stcb->asoc.cnt_msg_on_sb++;
5013         sq->tcb = stcb;
5014         TAILQ_INSERT_TAIL(&inp->sctp_queue_list, sq, next_sq);
5015         return (1);
5016 }
5017
5018
5019 struct sctp_tcb *
5020 sctp_remove_from_socket_q(struct sctp_inpcb *inp)
5021 {
5022         struct sctp_tcb *stcb = NULL;
5023         struct sctp_socket_q_list *sq;
5024
5025         /* W-Lock on INP assumed held */
5026         sq = TAILQ_FIRST(&inp->sctp_queue_list);
5027         if (sq == NULL)
5028                 return (NULL);
5029
5030         stcb = sq->tcb;
5031         TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
5032         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
5033         sctppcbinfo.ipi_count_sockq--;
5034         sctppcbinfo.ipi_gencnt_sockq++;
5035         if (stcb) {
5036                 stcb->asoc.cnt_msg_on_sb--;
5037         }
5038         return (stcb);
5039 }
5040
5041 int
5042 sctp_initiate_iterator(asoc_func af, uint32_t pcb_state, uint32_t asoc_state,
5043                        void *argp, uint32_t argi, end_func ef,
5044                        struct sctp_inpcb *s_inp)
5045 {
5046         struct sctp_iterator *it=NULL;
5047         int s;
5048         if (af == NULL) {
5049                 return (-1);
5050         }
5051         MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), M_PCB,
5052                M_WAITOK);
5053         if (it == NULL) {
5054                 return (ENOMEM);
5055         }
5056         memset(it, 0, sizeof(*it));
5057         it->function_toapply = af;
5058         it->function_atend = ef;
5059         it->pointer = argp;
5060         it->val = argi;
5061         it->pcb_flags = pcb_state;
5062         it->asoc_state = asoc_state;
5063         if (s_inp) {
5064                 it->inp = s_inp;
5065                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5066         } else {
5067                 SCTP_INP_INFO_RLOCK();
5068                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5069                 SCTP_INP_INFO_RUNLOCK();
5070                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5071
5072         }
5073         /* Init the timer */
5074 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
5075         callout_init(&it->tmr.timer, 0);
5076 #else
5077         callout_init(&it->tmr.timer);
5078 #endif
5079         /* add to the list of all iterators */
5080         SCTP_INP_INFO_WLOCK();
5081         LIST_INSERT_HEAD(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5082         SCTP_INP_INFO_WUNLOCK();
5083 #if defined(__NetBSD__) || defined(__OpenBSD__)
5084         s = splsoftnet();
5085 #else
5086         s = splnet();
5087 #endif
5088         sctp_iterator_timer(it);
5089         splx(s);
5090         return (0);
5091 }
5092
5093
5094 /*
5095  * Callout/Timer routines for OS that doesn't have them
5096  */
5097 #ifdef _SCTP_NEEDS_CALLOUT_
5098 #ifndef __APPLE__
5099 extern int ticks;
5100 #endif
5101
5102 void
5103 callout_init(struct callout *c)
5104 {
5105         bzero(c, sizeof(*c));
5106 }
5107
5108 void
5109 callout_reset(struct callout *c, int to_ticks, void (*ftn)(void *), void *arg)
5110 {
5111         int s;
5112
5113         s = splhigh();
5114         if (c->c_flags & CALLOUT_PENDING)
5115                 callout_stop(c);
5116
5117         /*
5118          * We could spl down here and back up at the TAILQ_INSERT_TAIL,
5119          * but there's no point since doing this setup doesn't take much
5120          * time.
5121          */
5122         if (to_ticks <= 0)
5123                 to_ticks = 1;
5124
5125         c->c_arg = arg;
5126         c->c_flags = (CALLOUT_ACTIVE | CALLOUT_PENDING);
5127         c->c_func = ftn;
5128 #ifdef __APPLE__
5129         c->c_time = to_ticks;   /* just store the requested timeout */
5130         timeout(ftn, arg, to_ticks);
5131 #else
5132         c->c_time = ticks + to_ticks;
5133         TAILQ_INSERT_TAIL(&sctppcbinfo.callqueue, c, tqe);
5134 #endif
5135         splx(s);
5136 }
5137
5138 int
5139 callout_stop(struct callout *c)
5140 {
5141         int     s;
5142
5143         s = splhigh();
5144         /*
5145          * Don't attempt to delete a callout that's not on the queue.
5146          */
5147         if (!(c->c_flags & CALLOUT_PENDING)) {
5148                 c->c_flags &= ~CALLOUT_ACTIVE;
5149                 splx(s);
5150                 return (0);
5151         }
5152         c->c_flags &= ~(CALLOUT_ACTIVE | CALLOUT_PENDING| CALLOUT_FIRED);
5153 #ifdef __APPLE__
5154 /*      thread_call_cancel(c->c_call); */
5155         untimeout(c->c_func, c->c_arg);
5156 #else
5157         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5158         c->c_func = NULL;
5159 #endif
5160         splx(s);
5161         return (1);
5162 }
5163
5164 #if !defined(__APPLE__)
5165 void
5166 sctp_fasttim(void)
5167 {
5168         struct callout *c, *n;
5169         struct calloutlist locallist;
5170         int inited = 0;
5171         int s;
5172         s = splhigh();
5173         /* run through and subtract and mark all callouts */
5174         c = TAILQ_FIRST(&sctppcbinfo.callqueue);
5175         while (c) {
5176                 n = TAILQ_NEXT(c, tqe);
5177                 if (c->c_time <= ticks) {
5178                         c->c_flags |= CALLOUT_FIRED;
5179                         c->c_time = 0;
5180                         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5181                         if (inited == 0) {
5182                                 TAILQ_INIT(&locallist);
5183                                 inited = 1;
5184                         }
5185                         /* move off of main list */
5186                         TAILQ_INSERT_TAIL(&locallist, c, tqe);
5187                 }
5188                 c = n;
5189         }
5190         /* Now all the ones on the locallist must be called */
5191         if (inited) {
5192                 c = TAILQ_FIRST(&locallist);
5193                 while (c) {
5194                         /* remove it */
5195                         TAILQ_REMOVE(&locallist, c, tqe);
5196                         /* now validate that it did not get canceled */
5197                         if (c->c_flags & CALLOUT_FIRED) {
5198                                 c->c_flags &= ~CALLOUT_PENDING;
5199                                 splx(s);
5200                                 (*c->c_func)(c->c_arg);
5201                                 s = splhigh();
5202                         }
5203                         c = TAILQ_FIRST(&locallist);
5204                 }
5205         }
5206         splx(s);
5207 }
5208 #endif
5209 #endif /* _SCTP_NEEDS_CALLOUT_ */