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 1.10 2006/06/23 17:20:13 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 #include <sys/thread2.h>
  64 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
  65 #include <sys/random.h>
  66 #endif
  67 #if defined(__NetBSD__)
  68 #include <sys/rnd.h>
  69 #endif
  70 #if defined(__OpenBSD__)
  71 #include <dev/rndvar.h>
  72 #endif
  73
  74 #if defined(__APPLE__)
  75 #include <netinet/sctp_callout.h>
  76 #elif defined(__OpenBSD__)
  77 #include <sys/timeout.h>
  78 #else
  79 #include <sys/callout.h>
  80 #endif
  81
  82 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000)
  83 #include <sys/limits.h>
  84 #else
  85 #include <machine/limits.h>
  86 #endif
  87 #include <machine/cpu.h>
  88
  89 #include <net/if.h>
  90 #include <net/if_types.h>
  91 #include <net/route.h>
  92 #include <netinet/in.h>
  93 #include <netinet/in_systm.h>
  94 #include <netinet/ip.h>
  95 #include <netinet/in_pcb.h>
  96 #include <netinet/in_var.h>
  97 #include <netinet/ip_var.h>
  98
  99 #ifdef INET6
 100 #include <netinet/ip6.h>
 101 #include <netinet6/ip6_var.h>
 102 #include <netinet6/scope6_var.h>
 103 #if defined(__FreeBSD__) || (__NetBSD__) || defined(__DragonFly__)
 104 #include <netinet6/in6_pcb.h>
 105 #elif defined(__OpenBSD__)
 106 #include <netinet/in_pcb.h>
 107 #endif
 108 #endif /* INET6 */
 109
 110 #ifdef IPSEC
 111 #ifndef __OpenBSD__
 112 #include <netinet6/ipsec.h>
 113 #include <netproto/key/key.h>
 114 #else
 115 #undef IPSEC
 116 #endif
 117 #endif /* IPSEC */
 118
 119 #include <netinet/sctp_var.h>
 120 #include <netinet/sctp_pcb.h>
 121 #include <netinet/sctputil.h>
 122 #include <netinet/sctp.h>
 123 #include <netinet/sctp_header.h>
 124 #include <netinet/sctp_asconf.h>
 125 #include <netinet/sctp_output.h>
 126 #include <netinet/sctp_timer.h>
 127
 128 #ifndef SCTP_PCBHASHSIZE
 129 /* default number of association hash buckets in each endpoint */
 130 #define SCTP_PCBHASHSIZE 256
 131 #endif
 132
 133 #ifdef SCTP_DEBUG
 134 u_int32_t sctp_debug_on = 0;
 135 #endif /* SCTP_DEBUG */
 136
 137 u_int32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];
 138
 139 int sctp_pcbtblsize = SCTP_PCBHASHSIZE;
 140
 141 struct sctp_epinfo sctppcbinfo;
 142
 143 /* FIX: we don't handle multiple link local scopes */
 144 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
 145 int
 146 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
 147 {
 148         struct in6_addr tmp_a, tmp_b;
 149         /* use a copy of a and b */
 150         tmp_a = *a;
 151         tmp_b = *b;
 152         in6_clearscope(&tmp_a);
 153         in6_clearscope(&tmp_b);
 154         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
 155 }
 156
 157 #ifdef __OpenBSD__
 158 extern int ipport_firstauto;
 159 extern int ipport_lastauto;
 160 extern int ipport_hifirstauto;
 161 extern int ipport_hilastauto;
 162 #endif
 163
 164 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
 165
 166 #ifndef xyzzy
 167 void sctp_validate_no_locks(void);
 168
 169 void
 170 SCTP_INP_RLOCK(struct sctp_inpcb *inp)
 171 {
 172         struct sctp_tcb *stcb;
 173         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 174                 if (mtx_owned(&(stcb)->tcb_mtx))
 175                         panic("I own TCB lock?");
 176         }
 177         if (mtx_owned(&(inp)->inp_mtx))
 178                 panic("INP Recursive Lock-R");
 179         mtx_lock(&(inp)->inp_mtx);
 180 }
 181
 182 void
 183 SCTP_INP_WLOCK(struct sctp_inpcb *inp)
 184 {
 185         SCTP_INP_RLOCK(inp);
 186 }
 187
 188 void
 189 SCTP_INP_INFO_RLOCK(void)
 190 {
 191         struct sctp_inpcb *inp;
 192         struct sctp_tcb *stcb;
 193         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
 194                 if (mtx_owned(&(inp)->inp_mtx))
 195                         panic("info-lock and own inp lock?");
 196                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 197                         if (mtx_owned(&(stcb)->tcb_mtx))
 198                                 panic("Info lock and own a tcb lock?");
 199                 }
 200         }
 201         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
 202                 panic("INP INFO Recursive Lock-R");
 203         mtx_lock(&sctppcbinfo.ipi_ep_mtx);
 204 }
 205
 206 void
 207 SCTP_INP_INFO_WLOCK(void)
 208 {
 209         SCTP_INP_INFO_RLOCK();
 210 }
 211
 212
 213 void sctp_validate_no_locks(void)
 214 {
 215         struct sctp_inpcb *inp;
 216         struct sctp_tcb *stcb;
 217
 218         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
 219                 panic("INP INFO lock is owned?");
 220
 221         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
 222                 if (mtx_owned(&(inp)->inp_mtx))
 223                         panic("You own an INP lock?");
 224                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 225                         if (mtx_owned(&(stcb)->tcb_mtx))
 226                                 panic("You own a TCB lock?");
 227                 }
 228         }
 229 }
 230
 231 #endif
 232 #endif
 233
 234 void
 235 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
 236 {
 237         /* We really don't need
 238          * to lock this, but I will
 239          * just because it does not hurt.
 240          */
 241         SCTP_INP_INFO_RLOCK();
 242         spcb->ep_count = sctppcbinfo.ipi_count_ep;
 243         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
 244         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
 245         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
 246         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
 247         spcb->sockq_count = sctppcbinfo.ipi_count_sockq;
 248         spcb->mbuf_track = sctppcbinfo.mbuf_track;
 249         SCTP_INP_INFO_RUNLOCK();
 250 }
 251
 252
 253 /*
 254  * Notes on locks for FreeBSD 5 and up. All association
 255  * lookups that have a definte ep, the INP structure is
 256  * assumed to be locked for reading. If we need to go
 257  * find the INP (ususally when a **inp is passed) then
 258  * we must lock the INFO structure first and if needed
 259  * lock the INP too. Note that if we lock it we must
 260  *
 261  */
 262
 263
 264 /*
 265  * Given a endpoint, look and find in its association list any association
 266  * with the "to" address given. This can be a "from" address, too, for
 267  * inbound packets. For outbound packets it is a true "to" address.
 268  */
 269 static struct sctp_tcb *
 270 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 271                         struct sockaddr *to, struct sctp_nets **netp)
 272 {
 273         /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
 274
 275         /*
 276          * Note for this module care must be taken when observing what to is
 277          * for. In most of the rest of the code the TO field represents my
 278          * peer and the FROM field represents my address. For this module it
 279          * is reversed of that.
 280          */
 281         /*
 282          * If we support the TCP model, then we must now dig through to
 283          * see if we can find our endpoint in the list of tcp ep's.
 284          */
 285         uint16_t lport, rport;
 286         struct sctppcbhead *ephead;
 287         struct sctp_inpcb *inp;
 288         struct sctp_laddr *laddr;
 289         struct sctp_tcb *stcb;
 290         struct sctp_nets *net;
 291
 292         if ((to == NULL) || (from == NULL)) {
 293                 return (NULL);
 294         }
 295
 296         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 297                 lport = ((struct sockaddr_in *)to)->sin_port;
 298                 rport = ((struct sockaddr_in *)from)->sin_port;
 299         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 300                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 301                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 302         } else {
 303                 return NULL;
 304         }
 305         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
 306                                                      (lport + rport), sctppcbinfo.hashtcpmark)];
 307         /*
 308          * Ok now for each of the guys in this bucket we must look
 309          * and see:
 310          *  - Does the remote port match.
 311          *  - Does there single association's addresses match this
 312          *    address (to).
 313          * If so we update p_ep to point to this ep and return the
 314          * tcb from it.
 315          */
 316         LIST_FOREACH(inp, ephead, sctp_hash) {
 317                 if (lport != inp->sctp_lport) {
 318                         continue;
 319                 }
 320                 SCTP_INP_RLOCK(inp);
 321                 /* check to see if the ep has one of the addresses */
 322                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 323                         /* We are NOT bound all, so look further */
 324                         int match = 0;
 325
 326                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 327                                 if (laddr->ifa == NULL) {
 328 #ifdef SCTP_DEBUG
 329                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 330                                                 printf("An ounce of prevention is worth a pound of cure\n");
 331                                         }
 332 #endif
 333                                         continue;
 334                                 }
 335                                 if (laddr->ifa->ifa_addr == NULL) {
 336 #ifdef SCTP_DEBUG
 337                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 338                                                 printf("ifa with a NULL address\n");
 339                                         }
 340 #endif
 341                                         continue;
 342                                 }
 343                                 if (laddr->ifa->ifa_addr->sa_family ==
 344                                     to->sa_family) {
 345                                         /* see if it matches */
 346                                         struct sockaddr_in *intf_addr, *sin;
 347                                         intf_addr = (struct sockaddr_in *)
 348                                                 laddr->ifa->ifa_addr;
 349                                         sin = (struct sockaddr_in *)to;
 350                                         if (from->sa_family == AF_INET) {
 351                                                 if (sin->sin_addr.s_addr ==
 352                                                     intf_addr->sin_addr.s_addr) {
 353                                                         match = 1;
 354                                                         SCTP_INP_RUNLOCK(inp);
 355                                                         break;
 356                                                 }
 357                                         } else {
 358                                                 struct sockaddr_in6 *intf_addr6;
 359                                                 struct sockaddr_in6 *sin6;
 360                                                 sin6 = (struct sockaddr_in6 *)
 361                                                         to;
 362                                                 intf_addr6 = (struct sockaddr_in6 *)
 363                                                         laddr->ifa->ifa_addr;
 364
 365                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 366                                                                          &intf_addr6->sin6_addr)) {
 367                                                         match = 1;
 368                                                         SCTP_INP_RUNLOCK(inp);
 369                                                         break;
 370                                                 }
 371                                         }
 372                                 }
 373                         }
 374                         if (match == 0) {
 375                                 /* This endpoint does not have this address */
 376                                 SCTP_INP_RUNLOCK(inp);
 377                                 continue;
 378                         }
 379                 }
 380                 /*
 381                  * Ok if we hit here the ep has the address, does it hold the
 382                  * tcb?
 383                  */
 384
 385                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 386                 if (stcb == NULL) {
 387                         SCTP_INP_RUNLOCK(inp);
 388                         continue;
 389                 }
 390                 SCTP_TCB_LOCK(stcb);
 391                 if (stcb->rport != rport) {
 392                         /* remote port does not match. */
 393                         SCTP_TCB_UNLOCK(stcb);
 394                         SCTP_INP_RUNLOCK(inp);
 395                         continue;
 396                 }
 397                 /* Does this TCB have a matching address? */
 398                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 399                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 400                                 /* not the same family, can't be a match */
 401                                 continue;
 402                         }
 403                         if (from->sa_family == AF_INET) {
 404                                 struct sockaddr_in *sin, *rsin;
 405                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
 406                                 rsin = (struct sockaddr_in *)from;
 407                                 if (sin->sin_addr.s_addr ==
 408                                     rsin->sin_addr.s_addr) {
 409                                         /* found it */
 410                                         if (netp != NULL) {
 411                                                 *netp = net;
 412                                         }
 413                                         /* Update the endpoint pointer */
 414                                         *inp_p = inp;
 415                                         SCTP_INP_RUNLOCK(inp);
 416                                         return (stcb);
 417                                 }
 418                         } else {
 419                                 struct sockaddr_in6 *sin6, *rsin6;
 420                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 421                                 rsin6 = (struct sockaddr_in6 *)from;
 422                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 423                                                          &rsin6->sin6_addr)) {
 424                                         /* found it */
 425                                         if (netp != NULL) {
 426                                                 *netp = net;
 427                                         }
 428                                         /* Update the endpoint pointer */
 429                                         *inp_p = inp;
 430                                         SCTP_INP_RUNLOCK(inp);
 431                                         return (stcb);
 432                                 }
 433                         }
 434                 }
 435                 SCTP_TCB_UNLOCK(stcb);
 436
 437                 SCTP_INP_RUNLOCK(inp);
 438         }
 439         return (NULL);
 440 }
 441
 442 struct sctp_tcb *
 443 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
 444     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
 445 {
 446         struct sctp_tcb *stcb;
 447         struct sockaddr_in *sin;
 448         struct sockaddr_in6 *sin6;
 449         struct sockaddr_storage local_store, remote_store;
 450         struct ip *iph;
 451         struct sctp_paramhdr parm_buf, *phdr;
 452         int ptype;
 453
 454         memset(&local_store, 0, sizeof(local_store));
 455         memset(&remote_store, 0, sizeof(remote_store));
 456
 457         /* First get the destination address setup too. */
 458         iph = mtod(m, struct ip *);
 459         if (iph->ip_v == IPVERSION) {
 460                 /* its IPv4 */
 461                 sin = (struct sockaddr_in *)&local_store;
 462                 sin->sin_family = AF_INET;
 463                 sin->sin_len = sizeof(*sin);
 464                 sin->sin_port = sh->dest_port;
 465                 sin->sin_addr.s_addr = iph->ip_dst.s_addr ;
 466         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
 467                 /* its IPv6 */
 468                 struct ip6_hdr *ip6;
 469                 ip6 = mtod(m, struct ip6_hdr *);
 470                 sin6 = (struct sockaddr_in6 *)&local_store;
 471                 sin6->sin6_family = AF_INET6;
 472                 sin6->sin6_len = sizeof(*sin6);
 473                 sin6->sin6_port = sh->dest_port;
 474                 sin6->sin6_addr = ip6->ip6_dst;
 475         } else {
 476                 return NULL;
 477         }
 478
 479         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
 480             &parm_buf, sizeof(struct sctp_paramhdr));
 481         if (phdr == NULL) {
 482 #ifdef SCTP_DEBUG
 483                 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 484                         printf("sctp_process_control: failed to get asconf lookup addr\n");
 485                 }
 486 #endif /* SCTP_DEBUG */
 487                 return NULL;
 488         }
 489         ptype = (int)((u_int)ntohs(phdr->param_type));
 490         /* get the correlation address */
 491         if (ptype == SCTP_IPV6_ADDRESS) {
 492                 /* ipv6 address param */
 493                 struct sctp_ipv6addr_param *p6, p6_buf;
 494                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
 495                         return NULL;
 496                 }
 497
 498                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
 499                     offset + sizeof(struct sctp_asconf_chunk),
 500                     &p6_buf.ph, sizeof(*p6));
 501                 if (p6 == NULL) {
 502 #ifdef SCTP_DEBUG
 503                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 504                                 printf("sctp_process_control: failed to get asconf v6 lookup addr\n");
 505                         }
 506 #endif /* SCTP_DEBUG */
 507                         return (NULL);
 508                 }
 509                 sin6 = (struct sockaddr_in6 *)&remote_store;
 510                 sin6->sin6_family = AF_INET6;
 511                 sin6->sin6_len = sizeof(*sin6);
 512                 sin6->sin6_port = sh->src_port;
 513                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
 514         } else if (ptype == SCTP_IPV4_ADDRESS) {
 515                 /* ipv4 address param */
 516                 struct sctp_ipv4addr_param *p4, p4_buf;
 517                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
 518                         return NULL;
 519                 }
 520
 521                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
 522                     offset + sizeof(struct sctp_asconf_chunk),
 523                     &p4_buf.ph, sizeof(*p4));
 524                 if (p4 == NULL) {
 525 #ifdef SCTP_DEBUG
 526                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
 527                                 printf("sctp_process_control: failed to get asconf v4 lookup addr\n");
 528                         }
 529 #endif /* SCTP_DEBUG */
 530                         return (NULL);
 531                 }
 532                 sin = (struct sockaddr_in *)&remote_store;
 533                 sin->sin_family = AF_INET;
 534                 sin->sin_len = sizeof(*sin);
 535                 sin->sin_port = sh->src_port;
 536                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
 537         } else {
 538                 /* invalid address param type */
 539                 return NULL;
 540         }
 541
 542         stcb = sctp_findassociation_ep_addr(inp_p,
 543             (struct sockaddr *)&remote_store, netp,
 544             (struct sockaddr *)&local_store, NULL);
 545         return (stcb);
 546 }
 547
 548 struct sctp_tcb *
 549 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 550     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 551 {
 552         struct sctpasochead *head;
 553         struct sctp_inpcb *inp;
 554         struct sctp_tcb *stcb;
 555         struct sctp_nets *net;
 556         uint16_t rport;
 557
 558         inp = *inp_p;
 559         if (remote->sa_family == AF_INET) {
 560                 rport = (((struct sockaddr_in *)remote)->sin_port);
 561         } else if (remote->sa_family == AF_INET6) {
 562                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 563         } else {
 564                 return (NULL);
 565         }
 566         if (locked_tcb) {
 567                 /* UN-lock so we can do proper locking here
 568                  * this occurs when called from load_addresses_from_init.
 569                  */
 570                 SCTP_TCB_UNLOCK(locked_tcb);
 571         }
 572         SCTP_INP_INFO_RLOCK();
 573         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 574                 /*
 575                  * Now either this guy is our listner or it's the connector.
 576                  * If it is the one that issued the connect, then it's only
 577                  * chance is to be the first TCB in the list. If it is the
 578                  * acceptor, then do the special_lookup to hash and find the
 579                  * real inp.
 580                  */
 581                 if (inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) {
 582                         /* to is peer addr, from is my addr */
 583                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 584                                                        netp);
 585                         if ((stcb != NULL) && (locked_tcb == NULL)){
 586                                 /* we have a locked tcb, lower refcount */
 587                                 SCTP_INP_WLOCK(inp);
 588                                 SCTP_INP_DECR_REF(inp);
 589                                 SCTP_INP_WUNLOCK(inp);
 590                         }
 591                         if (locked_tcb != NULL) {
 592                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 593                                 SCTP_TCB_LOCK(locked_tcb);
 594                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 595                                 if (stcb != NULL)
 596                                         SCTP_TCB_UNLOCK(stcb);
 597                         }
 598                         SCTP_INP_INFO_RUNLOCK();
 599                         return (stcb);
 600                 } else {
 601                         SCTP_INP_WLOCK(inp);
 602                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 603                         if (stcb == NULL) {
 604                                 goto null_return;
 605                         }
 606                         SCTP_TCB_LOCK(stcb);
 607                         if (stcb->rport != rport) {
 608                                 /* remote port does not match. */
 609                                 SCTP_TCB_UNLOCK(stcb);
 610                                 goto null_return;
 611                         }
 612                         /* now look at the list of remote addresses */
 613                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 614                                 if (net->ro._l_addr.sa.sa_family !=
 615                                     remote->sa_family) {
 616                                         /* not the same family */
 617                                         continue;
 618                                 }
 619                                 if (remote->sa_family == AF_INET) {
 620                                         struct sockaddr_in *sin, *rsin;
 621                                         sin = (struct sockaddr_in *)
 622                                                 &net->ro._l_addr;
 623                                         rsin = (struct sockaddr_in *)remote;
 624                                         if (sin->sin_addr.s_addr ==
 625                                             rsin->sin_addr.s_addr) {
 626                                                 /* found it */
 627                                                 if (netp != NULL) {
 628                                                         *netp = net;
 629                                                 }
 630                                                 if (locked_tcb == NULL) {
 631                                                         SCTP_INP_DECR_REF(inp);
 632                                                 }
 633                                                 SCTP_INP_WUNLOCK(inp);
 634                                                 SCTP_INP_INFO_RUNLOCK();
 635                                                 return (stcb);
 636                                         }
 637                                 } else if (remote->sa_family == AF_INET6) {
 638                                         struct sockaddr_in6 *sin6, *rsin6;
 639                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 640                                         rsin6 = (struct sockaddr_in6 *)remote;
 641                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 642                                                                  &rsin6->sin6_addr)) {
 643                                                 /* found it */
 644                                                 if (netp != NULL) {
 645                                                         *netp = net;
 646                                                 }
 647                                                 if (locked_tcb == NULL) {
 648                                                         SCTP_INP_DECR_REF(inp);
 649                                                 }
 650                                                 SCTP_INP_WUNLOCK(inp);
 651                                                 SCTP_INP_INFO_RUNLOCK();
 652                                                 return (stcb);
 653                                         }
 654                                 }
 655                         }
 656                         SCTP_TCB_UNLOCK(stcb);
 657                 }
 658         } else {
 659                 SCTP_INP_WLOCK(inp);
 660                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 661                                                                inp->sctp_hashmark)];
 662                 if (head == NULL) {
 663                         goto null_return;
 664                 }
 665                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 666                         if (stcb->rport != rport) {
 667                                 /* remote port does not match */
 668                                 continue;
 669                         }
 670                         /* now look at the list of remote addresses */
 671                         SCTP_TCB_LOCK(stcb);
 672                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 673                                 if (net->ro._l_addr.sa.sa_family !=
 674                                     remote->sa_family) {
 675                                         /* not the same family */
 676                                         continue;
 677                                 }
 678                                 if (remote->sa_family == AF_INET) {
 679                                         struct sockaddr_in *sin, *rsin;
 680                                         sin = (struct sockaddr_in *)
 681                                                 &net->ro._l_addr;
 682                                         rsin = (struct sockaddr_in *)remote;
 683                                         if (sin->sin_addr.s_addr ==
 684                                             rsin->sin_addr.s_addr) {
 685                                                 /* found it */
 686                                                 if (netp != NULL) {
 687                                                         *netp = net;
 688                                                 }
 689                                                 if (locked_tcb == NULL) {
 690                                                         SCTP_INP_DECR_REF(inp);
 691                                                 }
 692                                                 SCTP_INP_WUNLOCK(inp);
 693                                                 SCTP_INP_INFO_RUNLOCK();
 694                                                 return (stcb);
 695                                         }
 696                                 } else if (remote->sa_family == AF_INET6) {
 697                                         struct sockaddr_in6 *sin6, *rsin6;
 698                                         sin6 = (struct sockaddr_in6 *)
 699                                                 &net->ro._l_addr;
 700                                         rsin6 = (struct sockaddr_in6 *)remote;
 701                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 702                                                                  &rsin6->sin6_addr)) {
 703                                                 /* found it */
 704                                                 if (netp != NULL) {
 705                                                         *netp = net;
 706                                                 }
 707                                                 if (locked_tcb == NULL) {
 708                                                         SCTP_INP_DECR_REF(inp);
 709                                                 }
 710                                                 SCTP_INP_WUNLOCK(inp);
 711                                                 SCTP_INP_INFO_RUNLOCK();
 712                                                 return (stcb);
 713                                         }
 714                                 }
 715                         }
 716                         SCTP_TCB_UNLOCK(stcb);
 717                 }
 718         }
 719  null_return:
 720         /* clean up for returning null */
 721         if (locked_tcb){
 722                 if (locked_tcb->sctp_ep != inp) {
 723                         SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 724                         SCTP_TCB_LOCK(locked_tcb);
 725                         SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 726                 } else
 727                         SCTP_TCB_LOCK(locked_tcb);
 728         }
 729         SCTP_INP_WUNLOCK(inp);
 730         SCTP_INP_INFO_RUNLOCK();
 731         /* not found */
 732         return (NULL);
 733 }
 734
 735 /*
 736  * Find an association for a specific endpoint using the association id
 737  * given out in the COMM_UP notification
 738  */
 739 struct sctp_tcb *
 740 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, caddr_t asoc_id)
 741 {
 742         /*
 743          * Use my the assoc_id to find a endpoint
 744          */
 745         struct sctpasochead *head;
 746         struct sctp_tcb *stcb;
 747         u_int32_t vtag;
 748
 749         if (asoc_id == 0 || inp == NULL) {
 750                 return (NULL);
 751         }
 752         SCTP_INP_INFO_RLOCK();
 753         vtag = (u_int32_t)asoc_id;
 754         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
 755             sctppcbinfo.hashasocmark)];
 756         if (head == NULL) {
 757                 /* invalid vtag */
 758                 SCTP_INP_INFO_RUNLOCK();
 759                 return (NULL);
 760         }
 761         LIST_FOREACH(stcb, head, sctp_asocs) {
 762                 SCTP_INP_RLOCK(stcb->sctp_ep);
 763                 SCTP_TCB_LOCK(stcb);
 764                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 765                 if (stcb->asoc.my_vtag == vtag) {
 766                         /* candidate */
 767                         if (inp != stcb->sctp_ep) {
 768                                 /* some other guy has the
 769                                  * same vtag active (vtag collision).
 770                                  */
 771                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
 772                                 SCTP_TCB_UNLOCK(stcb);
 773                                 continue;
 774                         }
 775                         sctp_pegs[SCTP_VTAG_EXPR]++;
 776                         SCTP_INP_INFO_RUNLOCK();
 777                         return (stcb);
 778                 }
 779                 SCTP_TCB_UNLOCK(stcb);
 780         }
 781         SCTP_INP_INFO_RUNLOCK();
 782         return (NULL);
 783 }
 784
 785 static struct sctp_inpcb *
 786 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 787                     uint16_t lport)
 788 {
 789         struct sctp_inpcb *inp;
 790         struct sockaddr_in *sin;
 791         struct sockaddr_in6 *sin6;
 792         struct sctp_laddr *laddr;
 793
 794         /* Endpoing probe expects
 795          * that the INP_INFO is locked.
 796          */
 797         if (nam->sa_family == AF_INET) {
 798                 sin = (struct sockaddr_in *)nam;
 799                 sin6 = NULL;
 800         } else if (nam->sa_family == AF_INET6) {
 801                 sin6 = (struct sockaddr_in6 *)nam;
 802                 sin = NULL;
 803         } else {
 804                 /* unsupported family */
 805                 return (NULL);
 806         }
 807         if (head == NULL)
 808                 return (NULL);
 809
 810         LIST_FOREACH(inp, head, sctp_hash) {
 811                 SCTP_INP_RLOCK(inp);
 812
 813                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 814                     (inp->sctp_lport == lport)) {
 815                         /* got it */
 816                         if ((nam->sa_family == AF_INET) &&
 817                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 818 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
 819                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
 820 #else
 821 #if defined(__OpenBSD__)
 822                             (0) /* For open bsd we do dual bind only */
 823 #else
 824                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
 825 #endif
 826 #endif
 827                                 ) {
 828                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
 829                                 SCTP_INP_RUNLOCK(inp);
 830                                 continue;
 831                         }
 832                         /* A V6 address and the endpoint is NOT bound V6 */
 833                         if (nam->sa_family == AF_INET6 &&
 834                            (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 835                                 SCTP_INP_RUNLOCK(inp);
 836                                 continue;
 837                         }
 838                         SCTP_INP_RUNLOCK(inp);
 839                         return (inp);
 840                 }
 841                 SCTP_INP_RUNLOCK(inp);
 842         }
 843
 844         if ((nam->sa_family == AF_INET) &&
 845             (sin->sin_addr.s_addr == INADDR_ANY)) {
 846                 /* Can't hunt for one that has no address specified */
 847                 return (NULL);
 848         } else if ((nam->sa_family == AF_INET6) &&
 849                    (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
 850                 /* Can't hunt for one that has no address specified */
 851                 return (NULL);
 852         }
 853         /*
 854          * ok, not bound to all so see if we can find a EP bound to this
 855          * address.
 856          */
 857 #ifdef SCTP_DEBUG
 858         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 859                 printf("Ok, there is NO bound-all available for port:%x\n", ntohs(lport));
 860         }
 861 #endif
 862         LIST_FOREACH(inp, head, sctp_hash) {
 863                 SCTP_INP_RLOCK(inp);
 864                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 865                         SCTP_INP_RUNLOCK(inp);
 866                         continue;
 867                 }
 868                 /*
 869                  * Ok this could be a likely candidate, look at all of
 870                  * its addresses
 871                  */
 872                 if (inp->sctp_lport != lport) {
 873                         SCTP_INP_RUNLOCK(inp);
 874                         continue;
 875                 }
 876 #ifdef SCTP_DEBUG
 877                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 878                         printf("Ok, found maching local port\n");
 879                 }
 880 #endif
 881                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 882                         if (laddr->ifa == NULL) {
 883 #ifdef SCTP_DEBUG
 884                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 885                                         printf("An ounce of prevention is worth a pound of cure\n");
 886                                 }
 887 #endif
 888                                 continue;
 889                         }
 890 #ifdef SCTP_DEBUG
 891                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 892                                 printf("Ok laddr->ifa:%p is possible, ",
 893                                     laddr->ifa);
 894                         }
 895 #endif
 896                         if (laddr->ifa->ifa_addr == NULL) {
 897 #ifdef SCTP_DEBUG
 898                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 899                                         printf("Huh IFA as an ifa_addr=NULL, ");
 900                                 }
 901 #endif
 902                                 continue;
 903                         }
 904 #ifdef SCTP_DEBUG
 905                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 906                                 printf("Ok laddr->ifa:%p is possible, ",
 907                                     laddr->ifa->ifa_addr);
 908                                 sctp_print_address(laddr->ifa->ifa_addr);
 909                                 printf("looking for ");
 910                                 sctp_print_address(nam);
 911                         }
 912 #endif
 913                         if (laddr->ifa->ifa_addr->sa_family == nam->sa_family) {
 914                                 /* possible, see if it matches */
 915                                 struct sockaddr_in *intf_addr;
 916                                 intf_addr = (struct sockaddr_in *)
 917                                     laddr->ifa->ifa_addr;
 918                                 if (nam->sa_family == AF_INET) {
 919                                         if (sin->sin_addr.s_addr ==
 920                                             intf_addr->sin_addr.s_addr) {
 921 #ifdef SCTP_DEBUG
 922                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 923                                                         printf("YES, return ep:%p\n", inp);
 924                                                 }
 925 #endif
 926                                                 SCTP_INP_RUNLOCK(inp);
 927                                                 return (inp);
 928                                         }
 929                                 } else if (nam->sa_family == AF_INET6) {
 930                                         struct sockaddr_in6 *intf_addr6;
 931                                         intf_addr6 = (struct sockaddr_in6 *)
 932                                             laddr->ifa->ifa_addr;
 933                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 934                                             &intf_addr6->sin6_addr)) {
 935 #ifdef SCTP_DEBUG
 936                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 937                                                         printf("YES, return ep:%p\n", inp);
 938                                                 }
 939 #endif
 940                                                 SCTP_INP_RUNLOCK(inp);
 941                                                 return (inp);
 942                                         }
 943                                 }
 944                         }
 945                         SCTP_INP_RUNLOCK(inp);
 946                 }
 947         }
 948 #ifdef SCTP_DEBUG
 949         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 950                 printf("NO, Falls out to NULL\n");
 951         }
 952 #endif
 953         return (NULL);
 954 }
 955
 956
 957 struct sctp_inpcb *
 958 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock)
 959 {
 960         /*
 961          * First we check the hash table to see if someone has this port
 962          * bound with just the port.
 963          */
 964         struct sctp_inpcb *inp;
 965         struct sctppcbhead *head;
 966         struct sockaddr_in *sin;
 967         struct sockaddr_in6 *sin6;
 968         int lport;
 969 #ifdef SCTP_DEBUG
 970         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 971                 printf("Looking for endpoint %d :",
 972                        ntohs(((struct sockaddr_in *)nam)->sin_port));
 973                 sctp_print_address(nam);
 974         }
 975 #endif
 976         if (nam->sa_family == AF_INET) {
 977                 sin = (struct sockaddr_in *)nam;
 978                 lport = ((struct sockaddr_in *)nam)->sin_port;
 979         } else if (nam->sa_family == AF_INET6) {
 980                 sin6 = (struct sockaddr_in6 *)nam;
 981                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
 982         } else {
 983                 /* unsupported family */
 984                 return (NULL);
 985         }
 986         /*
 987          * I could cheat here and just cast to one of the types but we will
 988          * do it right. It also provides the check against an Unsupported
 989          * type too.
 990          */
 991         /* Find the head of the ALLADDR chain */
 992         if (have_lock == 0)
 993                 SCTP_INP_INFO_RLOCK();
 994         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
 995                                                              sctppcbinfo.hashmark)];
 996 #ifdef SCTP_DEBUG
 997         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 998                 printf("Main hash to lookup at head:%p\n", head);
 999         }
1000 #endif
1001         inp = sctp_endpoint_probe(nam, head, lport);
1002
1003         /*
1004          * If the TCP model exists it could be that the main listening
1005          * endpoint is gone but there exists a connected socket for this
1006          * guy yet. If so we can return the first one that we find. This
1007          * may NOT be the correct one but the sctp_findassociation_ep_addr
1008          * has further code to look at all TCP models.
1009          */
1010         if (inp == NULL && find_tcp_pool) {
1011                 unsigned int i;
1012 #ifdef SCTP_DEBUG
1013                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1014                         printf("EP was NULL and TCP model is supported\n");
1015                 }
1016 #endif
1017                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1018                         /*
1019                          * This is real gross, but we do NOT have a remote
1020                          * port at this point depending on who is calling. We
1021                          * must therefore look for ANY one that matches our
1022                          * local port :/
1023                          */
1024                         head = &sctppcbinfo.sctp_tcpephash[i];
1025                         if (LIST_FIRST(head)) {
1026                                 inp = sctp_endpoint_probe(nam, head, lport);
1027                                 if (inp) {
1028                                         /* Found one */
1029                                         break;
1030                                 }
1031                         }
1032                 }
1033         }
1034 #ifdef SCTP_DEBUG
1035         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1036                 printf("EP to return is %p\n", inp);
1037         }
1038 #endif
1039         if (have_lock == 0) {
1040                 if (inp) {
1041                         SCTP_INP_WLOCK(inp);
1042                         SCTP_INP_INCR_REF(inp);
1043                         SCTP_INP_WUNLOCK(inp);
1044                 }
1045                 SCTP_INP_INFO_RUNLOCK();
1046         } else {
1047                 if (inp) {
1048                         SCTP_INP_WLOCK(inp);
1049                         SCTP_INP_INCR_REF(inp);
1050                         SCTP_INP_WUNLOCK(inp);
1051                 }
1052         }
1053         return (inp);
1054 }
1055
1056 /*
1057  * Find an association for an endpoint with the pointer to whom you want
1058  * to send to and the endpoint pointer. The address can be IPv4 or IPv6.
1059  * We may need to change the *to to some other struct like a mbuf...
1060  */
1061 struct sctp_tcb *
1062 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1063     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
1064 {
1065         struct sctp_inpcb *inp;
1066         struct sctp_tcb *retval;
1067
1068         SCTP_INP_INFO_RLOCK();
1069         if (find_tcp_pool) {
1070                 if (inp_p != NULL) {
1071                         retval = sctp_tcb_special_locate(inp_p, from, to, netp);
1072                 } else {
1073                         retval = sctp_tcb_special_locate(&inp, from, to, netp);
1074                 }
1075                 if (retval != NULL) {
1076                         SCTP_INP_INFO_RUNLOCK();
1077                         return (retval);
1078                 }
1079         }
1080         inp = sctp_pcb_findep(to, 0, 1);
1081         if (inp_p != NULL) {
1082                 *inp_p = inp;
1083         }
1084         SCTP_INP_INFO_RUNLOCK();
1085
1086         if (inp == NULL) {
1087                 return (NULL);
1088         }
1089
1090         /*
1091          * ok, we have an endpoint, now lets find the assoc for it (if any)
1092          * we now place the source address or from in the to of the find
1093          * endpoint call. Since in reality this chain is used from the
1094          * inbound packet side.
1095          */
1096         if (inp_p != NULL) {
1097                 return (sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL));
1098         } else {
1099                 return (sctp_findassociation_ep_addr(&inp, from, netp, to, NULL));
1100         }
1101 }
1102
1103
1104 /*
1105  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1106  * find all addresses that the sender has specified in any address list.
1107  * Each address will be used to lookup the TCB and see if one exits.
1108  */
1109 static struct sctp_tcb *
1110 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1111     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1112     struct sockaddr *dest)
1113 {
1114         struct sockaddr_in sin4;
1115         struct sockaddr_in6 sin6;
1116         struct sctp_paramhdr *phdr, parm_buf;
1117         struct sctp_tcb *retval;
1118         u_int32_t ptype, plen;
1119
1120         memset(&sin4, 0, sizeof(sin4));
1121         memset(&sin6, 0, sizeof(sin6));
1122         sin4.sin_len = sizeof(sin4);
1123         sin4.sin_family = AF_INET;
1124         sin4.sin_port = sh->src_port;
1125         sin6.sin6_len = sizeof(sin6);
1126         sin6.sin6_family = AF_INET6;
1127         sin6.sin6_port = sh->src_port;
1128
1129         retval = NULL;
1130         offset += sizeof(struct sctp_init_chunk);
1131
1132         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1133         while (phdr != NULL) {
1134                 /* now we must see if we want the parameter */
1135                 ptype = ntohs(phdr->param_type);
1136                 plen = ntohs(phdr->param_length);
1137                 if (plen == 0) {
1138 #ifdef SCTP_DEBUG
1139                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1140                                 printf("sctp_findassociation_special_addr: Impossible length in parameter\n");
1141                         }
1142 #endif /* SCTP_DEBUG */
1143                         break;
1144                 }
1145                 if (ptype == SCTP_IPV4_ADDRESS &&
1146                     plen == sizeof(struct sctp_ipv4addr_param)) {
1147                         /* Get the rest of the address */
1148                         struct sctp_ipv4addr_param ip4_parm, *p4;
1149
1150                         phdr = sctp_get_next_param(m, offset,
1151                             (struct sctp_paramhdr *)&ip4_parm, plen);
1152                         if (phdr == NULL) {
1153                                 return (NULL);
1154                         }
1155                         p4 = (struct sctp_ipv4addr_param *)phdr;
1156                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1157                         /* look it up */
1158                         retval = sctp_findassociation_ep_addr(inp_p,
1159                             (struct sockaddr *)&sin4, netp, dest, NULL);
1160                         if (retval != NULL) {
1161                                 return (retval);
1162                         }
1163                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1164                     plen == sizeof(struct sctp_ipv6addr_param)) {
1165                         /* Get the rest of the address */
1166                         struct sctp_ipv6addr_param ip6_parm, *p6;
1167
1168                         phdr = sctp_get_next_param(m, offset,
1169                             (struct sctp_paramhdr *)&ip6_parm, plen);
1170                         if (phdr == NULL) {
1171                                 return (NULL);
1172                         }
1173                         p6 = (struct sctp_ipv6addr_param *)phdr;
1174                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1175                         /* look it up */
1176                         retval = sctp_findassociation_ep_addr(inp_p,
1177                             (struct sockaddr *)&sin6, netp, dest, NULL);
1178                         if (retval != NULL) {
1179                                 return (retval);
1180                         }
1181                 }
1182                 offset += SCTP_SIZE32(plen);
1183                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1184                     sizeof(parm_buf));
1185         }
1186         return (NULL);
1187 }
1188
1189 static struct sctp_tcb *
1190 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1191     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1192     uint16_t lport)
1193 {
1194         /*
1195          * Use my vtag to hash. If we find it we then verify the source addr
1196          * is in the assoc. If all goes well we save a bit on rec of a packet.
1197          */
1198         struct sctpasochead *head;
1199         struct sctp_nets *net;
1200         struct sctp_tcb *stcb;
1201
1202         SCTP_INP_INFO_RLOCK();
1203         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1204             sctppcbinfo.hashasocmark)];
1205         if (head == NULL) {
1206                 /* invalid vtag */
1207                 SCTP_INP_INFO_RUNLOCK();
1208                 return (NULL);
1209         }
1210         LIST_FOREACH(stcb, head, sctp_asocs) {
1211                 SCTP_INP_RLOCK(stcb->sctp_ep);
1212                 SCTP_TCB_LOCK(stcb);
1213                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1214                 if (stcb->asoc.my_vtag == vtag) {
1215                         /* candidate */
1216                         if (stcb->rport != rport) {
1217                                 /*
1218                                  * we could remove this if vtags are unique
1219                                  * across the system.
1220                                  */
1221                                 SCTP_TCB_UNLOCK(stcb);
1222                                 continue;
1223                         }
1224                         if (stcb->sctp_ep->sctp_lport != lport) {
1225                                 /*
1226                                  * we could remove this if vtags are unique
1227                                  * across the system.
1228                                  */
1229                                 SCTP_TCB_UNLOCK(stcb);
1230                                 continue;
1231                         }
1232                         net = sctp_findnet(stcb, from);
1233                         if (net) {
1234                                 /* yep its him. */
1235                                 *netp = net;
1236                                 sctp_pegs[SCTP_VTAG_EXPR]++;
1237                                 *inp_p = stcb->sctp_ep;
1238                                 SCTP_INP_INFO_RUNLOCK();
1239                                 return (stcb);
1240                         } else {
1241                                 /* not him, this should only
1242                                  * happen in rare cases so
1243                                  * I peg it.
1244                                  */
1245                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
1246                         }
1247                 }
1248                 SCTP_TCB_UNLOCK(stcb);
1249         }
1250         SCTP_INP_INFO_RUNLOCK();
1251         return (NULL);
1252 }
1253
1254 /*
1255  * Find an association with the pointer to the inbound IP packet. This
1256  * can be a IPv4 or IPv6 packet.
1257  */
1258 struct sctp_tcb *
1259 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1260     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1261     struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1262 {
1263         int find_tcp_pool;
1264         struct ip *iph;
1265         struct sctp_tcb *retval;
1266         struct sockaddr_storage to_store, from_store;
1267         struct sockaddr *to = (struct sockaddr *)&to_store;
1268         struct sockaddr *from = (struct sockaddr *)&from_store;
1269         struct sctp_inpcb *inp;
1270
1271
1272         iph = mtod(m, struct ip *);
1273         if (iph->ip_v == IPVERSION) {
1274                 /* its IPv4 */
1275                 struct sockaddr_in *to4, *from4;
1276
1277                 to4 = (struct sockaddr_in *)&to_store;
1278                 from4 = (struct sockaddr_in *)&from_store;
1279                 bzero(to4, sizeof(*to4));
1280                 bzero(from4, sizeof(*from4));
1281                 from4->sin_family = to4->sin_family = AF_INET;
1282                 from4->sin_len = to4->sin_len = sizeof(struct sockaddr_in);
1283                 from4->sin_addr.s_addr  = iph->ip_src.s_addr;
1284                 to4->sin_addr.s_addr = iph->ip_dst.s_addr ;
1285                 from4->sin_port = sh->src_port;
1286                 to4->sin_port = sh->dest_port;
1287         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1288                 /* its IPv6 */
1289                 struct ip6_hdr *ip6;
1290                 struct sockaddr_in6 *to6, *from6;
1291
1292                 ip6 = mtod(m, struct ip6_hdr *);
1293                 to6 = (struct sockaddr_in6 *)&to_store;
1294                 from6 = (struct sockaddr_in6 *)&from_store;
1295                 bzero(to6, sizeof(*to6));
1296                 bzero(from6, sizeof(*from6));
1297                 from6->sin6_family = to6->sin6_family = AF_INET6;
1298                 from6->sin6_len = to6->sin6_len = sizeof(struct sockaddr_in6);
1299                 to6->sin6_addr = ip6->ip6_dst;
1300                 from6->sin6_addr = ip6->ip6_src;
1301                 from6->sin6_port = sh->src_port;
1302                 to6->sin6_port = sh->dest_port;
1303                 /* Get the scopes in properly to the sin6 addr's */
1304                 in6_recoverscope(to6, &to6->sin6_addr, NULL);
1305 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1306                 in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
1307 #else
1308                 in6_embedscope(&to6->sin6_addr, to6);
1309 #endif
1310
1311                 in6_recoverscope(from6, &from6->sin6_addr, NULL);
1312 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1313                 in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
1314 #else
1315                 in6_embedscope(&from6->sin6_addr, from6);
1316 #endif
1317         } else {
1318                 /* Currently not supported. */
1319                 return (NULL);
1320         }
1321 #ifdef SCTP_DEBUG
1322         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1323                 printf("Looking for port %d address :",
1324                        ntohs(((struct sockaddr_in *)to)->sin_port));
1325                 sctp_print_address(to);
1326                 printf("From for port %d address :",
1327                        ntohs(((struct sockaddr_in *)from)->sin_port));
1328                 sctp_print_address(from);
1329         }
1330 #endif
1331
1332         if (sh->v_tag) {
1333                 /* we only go down this path if vtag is non-zero */
1334                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1335                     inp_p, netp, sh->src_port, sh->dest_port);
1336                 if (retval) {
1337                         return (retval);
1338                 }
1339         }
1340         find_tcp_pool = 0;
1341         if ((ch->chunk_type != SCTP_INITIATION) &&
1342             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1343             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1344             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1345                 /* Other chunk types go to the tcp pool. */
1346                 find_tcp_pool = 1;
1347         }
1348         if (inp_p) {
1349                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1350                     find_tcp_pool);
1351                 inp = *inp_p;
1352         } else {
1353                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1354                     find_tcp_pool);
1355         }
1356 #ifdef SCTP_DEBUG
1357         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1358                 printf("retval:%p inp:%p\n", retval, inp);
1359         }
1360 #endif
1361         if (retval == NULL && inp) {
1362                 /* Found a EP but not this address */
1363 #ifdef SCTP_DEBUG
1364                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1365                         printf("Found endpoint %p but no asoc - ep state:%x\n",
1366                             inp, inp->sctp_flags);
1367                 }
1368 #endif
1369                 if ((ch->chunk_type == SCTP_INITIATION) ||
1370                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1371                         /*
1372                          * special hook, we do NOT return linp or an
1373                          * association that is linked to an existing
1374                          * association that is under the TCP pool (i.e. no
1375                          * listener exists). The endpoint finding routine
1376                          * will always find a listner before examining the
1377                          * TCP pool.
1378                          */
1379                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1380 #ifdef SCTP_DEBUG
1381                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1382                                         printf("Gak, its in the TCP pool... return NULL");
1383                                 }
1384 #endif
1385                                 if (inp_p) {
1386                                         *inp_p = NULL;
1387                                 }
1388                                 return (NULL);
1389                         }
1390 #ifdef SCTP_DEBUG
1391                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1392                                 printf("Now doing SPECIAL find\n");
1393                         }
1394 #endif
1395                         retval = sctp_findassociation_special_addr(m, iphlen,
1396                             offset, sh, inp_p, netp, to);
1397                 }
1398         }
1399 #ifdef SCTP_DEBUG
1400         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1401             printf("retval is %p\n", retval);
1402         }
1403 #endif
1404         return (retval);
1405 }
1406
1407 extern int sctp_max_burst_default;
1408
1409 extern unsigned int sctp_delayed_sack_time_default;
1410 extern unsigned int sctp_heartbeat_interval_default;
1411 extern unsigned int sctp_pmtu_raise_time_default;
1412 extern unsigned int sctp_shutdown_guard_time_default;
1413 extern unsigned int sctp_secret_lifetime_default;
1414
1415 extern unsigned int sctp_rto_max_default;
1416 extern unsigned int sctp_rto_min_default;
1417 extern unsigned int sctp_rto_initial_default;
1418 extern unsigned int sctp_init_rto_max_default;
1419 extern unsigned int sctp_valid_cookie_life_default;
1420 extern unsigned int sctp_init_rtx_max_default;
1421 extern unsigned int sctp_assoc_rtx_max_default;
1422 extern unsigned int sctp_path_rtx_max_default;
1423 extern unsigned int sctp_nr_outgoing_streams_default;
1424
1425 /*
1426  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1427  * addresses. This way if we don't get a bind we by default pick a ephemeral
1428  * port with all addresses bound.
1429  */
1430 int
1431 sctp_inpcb_alloc(struct socket *so)
1432 {
1433         /*
1434          * we get called when a new endpoint starts up. We need to allocate
1435          * the sctp_inpcb structure from the zone and init it. Mark it as
1436          * unbound and find a port that we can use as an ephemeral with
1437          * INADDR_ANY. If the user binds later no problem we can then add
1438          * in the specific addresses. And setup the default parameters for
1439          * the EP.
1440          */
1441         int i, error;
1442         struct sctp_inpcb *inp, *n_inp;
1443         struct sctp_pcb *m;
1444         struct timeval time;
1445
1446         error = 0;
1447
1448         /* Hack alert:
1449          *
1450          * This code audits the entire INP list to see if
1451          * any ep's that are in the GONE state are now
1452          * all free. This should not happen really since when
1453          * the last association if freed we should end up deleting
1454          * the inpcb. This code including the locks should
1455          * be taken out ... since the last set of fixes I
1456          * have not seen the "Found a GONE on list" has not
1457          * came out. But i am paranoid and we will leave this
1458          * in at the cost of efficency on allocation of PCB's.
1459          * Probably we should move this to the invariant
1460          * compile options
1461          */
1462 /* #ifdef INVARIANTS*/
1463         SCTP_INP_INFO_RLOCK();
1464         inp = LIST_FIRST(&sctppcbinfo.listhead);
1465         while (inp) {
1466                 n_inp = LIST_NEXT(inp, sctp_list);
1467                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1468                         if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
1469                                 /* finish the job now */
1470                                 printf("Found a GONE on list\n");
1471                                 SCTP_INP_INFO_RUNLOCK();
1472                                 sctp_inpcb_free(inp, 1);
1473                                 SCTP_INP_INFO_RLOCK();
1474                         }
1475                 }
1476                 inp = n_inp;
1477         }
1478         SCTP_INP_INFO_RUNLOCK();
1479 /* #endif INVARIANTS*/
1480
1481         SCTP_INP_INFO_WLOCK();
1482         inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
1483         if (inp == NULL) {
1484                 printf("Out of SCTP-INPCB structures - no resources\n");
1485                 SCTP_INP_INFO_WUNLOCK();
1486                 return (ENOBUFS);
1487         }
1488
1489         /* zap it */
1490         bzero(inp, sizeof(*inp));
1491
1492         /* bump generations */
1493         inp->ip_inp.inp.inp_socket = so;
1494
1495         /* setup socket pointers */
1496         inp->sctp_socket = so;
1497
1498         /* setup inpcb socket too */
1499         inp->ip_inp.inp.inp_socket = so;
1500         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1501 #ifdef IPSEC
1502 #if !(defined(__OpenBSD__) || defined(__APPLE__))
1503         {
1504                 struct inpcbpolicy *pcb_sp = NULL;
1505                 error = ipsec_init_policy(so, &pcb_sp);
1506                 /* Arrange to share the policy */
1507                 inp->ip_inp.inp.inp_sp = pcb_sp;
1508                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1509         }
1510 #else
1511         /* not sure what to do for openbsd here */
1512         error = 0;
1513 #endif
1514         if (error != 0) {
1515                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1516                 SCTP_INP_INFO_WUNLOCK();
1517                 return error;
1518         }
1519 #endif /* IPSEC */
1520         sctppcbinfo.ipi_count_ep++;
1521 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1522         inp->ip_inp.inp.inp_gencnt = ++sctppcbinfo.ipi_gencnt_ep;
1523         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1524 #else
1525         inp->inp_ip_ttl = ip_defttl;
1526         inp->inp_ip_tos = 0;
1527 #endif
1528
1529         so->so_pcb = (caddr_t)inp;
1530
1531         if ((so->so_type == SOCK_DGRAM) ||
1532             (so->so_type == SOCK_SEQPACKET)) {
1533                 /* UDP style socket */
1534                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1535                     SCTP_PCB_FLAGS_UNBOUND);
1536                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1537         } else if (so->so_type == SOCK_STREAM) {
1538                 /* TCP style socket */
1539                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1540                     SCTP_PCB_FLAGS_UNBOUND);
1541                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1542         } else {
1543                 /*
1544                  * unsupported socket type (RAW, etc)- in case we missed
1545                  * it in protosw
1546                  */
1547                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1548                 SCTP_INP_INFO_WUNLOCK();
1549                 return (EOPNOTSUPP);
1550         }
1551         inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1552 #ifdef __NetBSD__
1553             HASH_LIST,
1554 #endif
1555             M_PCB,
1556 #if defined(__NetBSD__) || defined(__OpenBSD__)
1557             M_WAITOK,
1558 #endif
1559             &inp->sctp_hashmark);
1560         if (inp->sctp_tcbhash == NULL) {
1561                 printf("Out of SCTP-INPCB->hashinit - no resources\n");
1562                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1563                 SCTP_INP_INFO_WUNLOCK();
1564                 return (ENOBUFS);
1565         }
1566         /* LOCK init's */
1567         SCTP_INP_LOCK_INIT(inp);
1568         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1569         /* lock the new ep */
1570         SCTP_INP_WLOCK(inp);
1571
1572         /* add it to the info area */
1573         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1574         SCTP_INP_INFO_WUNLOCK();
1575
1576         LIST_INIT(&inp->sctp_addr_list);
1577         LIST_INIT(&inp->sctp_asoc_list);
1578         TAILQ_INIT(&inp->sctp_queue_list);
1579         /* Init the timer structure for signature change */
1580 #if defined (__FreeBSD__) && __FreeBSD_version >= 500000
1581         callout_init(&inp->sctp_ep.signature_change.timer, 0);
1582 #else
1583         callout_init(&inp->sctp_ep.signature_change.timer);
1584 #endif
1585         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1586
1587         /* now init the actual endpoint default data */
1588         m = &inp->sctp_ep;
1589
1590         /* setup the base timeout information */
1591         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1592         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1593         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1594         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
1595         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1596         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1597         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1598         /* all max/min max are in ms */
1599         m->sctp_maxrto = sctp_rto_max_default;
1600         m->sctp_minrto = sctp_rto_min_default;
1601         m->initial_rto = sctp_rto_initial_default;
1602         m->initial_init_rto_max = sctp_init_rto_max_default;
1603
1604         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1605
1606         m->max_init_times = sctp_init_rtx_max_default;
1607         m->max_send_times = sctp_assoc_rtx_max_default;
1608         m->def_net_failure = sctp_path_rtx_max_default;
1609         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1610         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1611         m->max_burst = sctp_max_burst_default;
1612         /* number of streams to pre-open on a association */
1613         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1614
1615         /* Add adaption cookie */
1616         m->adaption_layer_indicator = 0x504C5253;
1617
1618         /* seed random number generator */
1619         m->random_counter = 1;
1620         m->store_at = SCTP_SIGNATURE_SIZE;
1621 #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
1622         read_random_unlimited(m->random_numbers, sizeof(m->random_numbers));
1623 #elif defined(__APPLE__) || (__FreeBSD_version > 500000)
1624         read_random(m->random_numbers, sizeof(m->random_numbers));
1625 #elif defined(__OpenBSD__)
1626         get_random_bytes(m->random_numbers, sizeof(m->random_numbers));
1627 #elif defined(__NetBSD__) && NRND > 0
1628         rnd_extract_data(m->random_numbers, sizeof(m->random_numbers),
1629                          RND_EXTRACT_ANY);
1630 #else
1631         {
1632                 u_int32_t *ranm, *ranp;
1633                 ranp = (u_int32_t *)&m->random_numbers;
1634                 ranm = ranp + (SCTP_SIGNATURE_ALOC_SIZE/sizeof(u_int32_t));
1635                 if ((u_long)ranp % 4) {
1636                         /* not a even boundary? */
1637                         ranp = (u_int32_t *)SCTP_SIZE32((u_long)ranp);
1638                 }
1639                 while (ranp < ranm) {
1640                         *ranp = random();
1641                         ranp++;
1642                 }
1643         }
1644 #endif
1645         sctp_fill_random_store(m);
1646
1647         /* Minimum cookie size */
1648         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1649                 sizeof(struct sctp_state_cookie);
1650         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1651
1652         /* Setup the initial secret */
1653         SCTP_GETTIME_TIMEVAL(&time);
1654         m->time_of_secret_change = time.tv_sec;
1655
1656         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1657                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1658         }
1659         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1660
1661         /* How long is a cookie good for ? */
1662         m->def_cookie_life = sctp_valid_cookie_life_default;
1663         SCTP_INP_WUNLOCK(inp);
1664         return (error);
1665 }
1666
1667
1668 void
1669 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1670     struct sctp_tcb *stcb)
1671 {
1672         uint16_t lport, rport;
1673         struct sctppcbhead *head;
1674         struct sctp_laddr *laddr, *oladdr;
1675
1676         SCTP_TCB_UNLOCK(stcb);
1677         SCTP_INP_INFO_WLOCK();
1678         SCTP_INP_WLOCK(old_inp);
1679         SCTP_INP_WLOCK(new_inp);
1680         SCTP_TCB_LOCK(stcb);
1681
1682         new_inp->sctp_ep.time_of_secret_change =
1683             old_inp->sctp_ep.time_of_secret_change;
1684         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1685             sizeof(old_inp->sctp_ep.secret_key));
1686         new_inp->sctp_ep.current_secret_number =
1687             old_inp->sctp_ep.current_secret_number;
1688         new_inp->sctp_ep.last_secret_number =
1689             old_inp->sctp_ep.last_secret_number;
1690         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1691
1692         /* Copy the port across */
1693         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1694         rport = stcb->rport;
1695         /* Pull the tcb from the old association */
1696         LIST_REMOVE(stcb, sctp_tcbhash);
1697         LIST_REMOVE(stcb, sctp_tcblist);
1698
1699         /* Now insert the new_inp into the TCP connected hash */
1700         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1701             sctppcbinfo.hashtcpmark)];
1702
1703         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1704
1705         /* Now move the tcb into the endpoint list */
1706         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1707         /*
1708          * Question, do we even need to worry about the ep-hash since
1709          * we only have one connection? Probably not :> so lets
1710          * get rid of it and not suck up any kernel memory in that.
1711          */
1712         SCTP_INP_INFO_WUNLOCK();
1713         stcb->sctp_socket = new_inp->sctp_socket;
1714         stcb->sctp_ep = new_inp;
1715         if (new_inp->sctp_tcbhash != NULL) {
1716                 FREE(new_inp->sctp_tcbhash, M_PCB);
1717                 new_inp->sctp_tcbhash = NULL;
1718         }
1719         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1720                 /* Subset bound, so copy in the laddr list from the old_inp */
1721                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1722                         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
1723                             sctppcbinfo.ipi_zone_laddr);
1724                         if (laddr == NULL) {
1725                                 /*
1726                                  * Gak, what can we do? This assoc is really
1727                                  * HOSED. We probably should send an abort
1728                                  * here.
1729                                  */
1730 #ifdef SCTP_DEBUG
1731                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1732                                         printf("Association hosed in TCP model, out of laddr memory\n");
1733                                 }
1734 #endif /* SCTP_DEBUG */
1735                                 continue;
1736                         }
1737                         sctppcbinfo.ipi_count_laddr++;
1738                         sctppcbinfo.ipi_gencnt_laddr++;
1739                         bzero(laddr, sizeof(*laddr));
1740                         laddr->ifa = oladdr->ifa;
1741                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1742                             sctp_nxt_addr);
1743                         new_inp->laddr_count++;
1744                 }
1745         }
1746         SCTP_INP_WUNLOCK(new_inp);
1747         SCTP_INP_WUNLOCK(old_inp);
1748 }
1749
1750 static int
1751 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
1752 {
1753         struct sctppcbhead *head;
1754         struct sctp_inpcb *t_inp;
1755
1756         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1757             sctppcbinfo.hashmark)];
1758         LIST_FOREACH(t_inp, head, sctp_hash) {
1759                 if (t_inp->sctp_lport != lport) {
1760                         continue;
1761                 }
1762                 /* This one is in use. */
1763                 /* check the v6/v4 binding issue */
1764                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1765 #if defined(__FreeBSD__)
1766                     (((struct inpcb *)t_inp)->inp_flags & IN6P_IPV6_V6ONLY)
1767 #else
1768 #if defined(__OpenBSD__)
1769                     (0) /* For open bsd we do dual bind only */
1770 #else
1771                     (((struct in6pcb *)t_inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1772 #endif
1773 #endif
1774                         ) {
1775                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1776                                 /* collision in V6 space */
1777                                 return (1);
1778                         } else {
1779                                 /* inp is BOUND_V4 no conflict */
1780                                 continue;
1781                         }
1782                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1783                         /* t_inp is bound v4 and v6, conflict always */
1784                         return (1);
1785                 } else {
1786                         /* t_inp is bound only V4 */
1787                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1788 #if defined(__FreeBSD__)
1789                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
1790 #else
1791 #if defined(__OpenBSD__)
1792                             (0) /* For open bsd we do dual bind only */
1793 #else
1794                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1795 #endif
1796 #endif
1797                                 ) {
1798                                 /* no conflict */
1799                                 continue;
1800                         }
1801                         /* else fall through to conflict */
1802                 }
1803                 return (1);
1804         }
1805         return (0);
1806 }
1807
1808 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
1809 /*
1810  * Don't know why, but without this there is an unknown reference when
1811  * compiling NetBSD... hmm
1812  */
1813 extern void in6_sin6_2_sin (struct sockaddr_in *, struct sockaddr_in6 *sin6);
1814 #endif
1815
1816
1817 int
1818 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
1819 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1820 #else
1821 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct proc *p)
1822 #endif
1823 {
1824         /* bind a ep to a socket address */
1825         struct sctppcbhead *head;
1826         struct sctp_inpcb *inp, *inp_tmp;
1827         struct inpcb *ip_inp;
1828         int bindall;
1829         uint16_t lport;
1830         int error;
1831
1832         lport = 0;
1833         error = 0;
1834         bindall = 1;
1835         inp = (struct sctp_inpcb *)so->so_pcb;
1836         ip_inp = (struct inpcb *)so->so_pcb;
1837 #ifdef SCTP_DEBUG
1838         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1839                 if (addr) {
1840                         printf("Bind called port:%d\n",
1841                                ntohs(((struct sockaddr_in *)addr)->sin_port));
1842                         printf("Addr :");
1843                         sctp_print_address(addr);
1844                 }
1845         }
1846 #endif /* SCTP_DEBUG */
1847         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1848                 /* already did a bind, subsequent binds NOT allowed ! */
1849                 return (EINVAL);
1850         }
1851
1852         if (addr != NULL) {
1853                 if (addr->sa_family == AF_INET) {
1854                         struct sockaddr_in *sin;
1855
1856                         /* IPV6_V6ONLY socket? */
1857                         if (
1858 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1859                                 (ip_inp->inp_flags & IN6P_IPV6_V6ONLY)
1860 #else
1861 #if defined(__OpenBSD__)
1862                                 (0)     /* For openbsd we do dual bind only */
1863 #else
1864                                 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1865 #endif
1866 #endif
1867                                 ) {
1868                                 return (EINVAL);
1869                         }
1870
1871                         if (addr->sa_len != sizeof(*sin))
1872                                 return (EINVAL);
1873
1874                         sin = (struct sockaddr_in *)addr;
1875                         lport = sin->sin_port;
1876
1877                         if (sin->sin_addr.s_addr != INADDR_ANY) {
1878                                 bindall = 0;
1879                         }
1880                 } else if (addr->sa_family == AF_INET6) {
1881                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
1882                         struct sockaddr_in6 *sin6;
1883
1884                         sin6 = (struct sockaddr_in6 *)addr;
1885
1886                         if (addr->sa_len != sizeof(*sin6))
1887                                 return (EINVAL);
1888
1889                         lport = sin6->sin6_port;
1890                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1891                                 bindall = 0;
1892                                 /* KAME hack: embed scopeid */
1893 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1894                                 if (in6_embedscope(&sin6->sin6_addr, sin6,
1895                                     ip_inp, NULL) != 0)
1896                                         return (EINVAL);
1897 #elif defined(__FreeBSD__)
1898                                 error = scope6_check_id(sin6, ip6_use_defzone);
1899                                 if (error != 0)
1900                                         return (error);
1901 #else
1902                                 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
1903                                         return (EINVAL);
1904                                 }
1905 #endif
1906                         }
1907 #ifndef SCOPEDROUTING
1908                         /* this must be cleared for ifa_ifwithaddr() */
1909                         sin6->sin6_scope_id = 0;
1910 #endif /* SCOPEDROUTING */
1911                 } else {
1912                         return (EAFNOSUPPORT);
1913                 }
1914         }
1915         SCTP_INP_INFO_WLOCK();
1916         SCTP_INP_WLOCK(inp);
1917         /* increase our count due to the unlock we do */
1918         SCTP_INP_INCR_REF(inp);
1919         if (lport) {
1920                 /*
1921                  * Did the caller specify a port? if so we must see if a
1922                  * ep already has this one bound.
1923                  */
1924                 /* got to be root to get at low ports */
1925                 if (ntohs(lport) < IPPORT_RESERVED) {
1926                         if (p && (error =
1927 #ifdef __FreeBSD__
1928 #if __FreeBSD_version >= 500000
1929                             suser_cred(p->td_ucred, 0)
1930 #else
1931                             suser(p)
1932 #endif
1933 #elif defined(__NetBSD__) || defined(__APPLE__)
1934                             suser(p->p_ucred, &p->p_acflag)
1935 #elif defined(__DragonFly__)
1936                             suser(p)
1937 #else
1938                             suser(p, 0)
1939 #endif
1940                             )) {
1941                                 SCTP_INP_DECR_REF(inp);
1942                                 SCTP_INP_WUNLOCK(inp);
1943                                 SCTP_INP_INFO_WUNLOCK();
1944                                 return (error);
1945                         }
1946                 }
1947                 if (p == NULL) {
1948                         SCTP_INP_DECR_REF(inp);
1949                         SCTP_INP_WUNLOCK(inp);
1950                         SCTP_INP_INFO_WUNLOCK();
1951                         return (error);
1952                 }
1953                 SCTP_INP_WUNLOCK(inp);
1954                 inp_tmp = sctp_pcb_findep(addr, 0, 1);
1955                 if (inp_tmp != NULL) {
1956                         /* lock guy returned and lower count
1957                          * note that we are not bound so inp_tmp
1958                          * should NEVER be inp. And it is this
1959                          * inp (inp_tmp) that gets the reference
1960                          * bump, so we must lower it.
1961                          */
1962                         SCTP_INP_WLOCK(inp_tmp);
1963                         SCTP_INP_DECR_REF(inp_tmp);
1964                         SCTP_INP_WUNLOCK(inp_tmp);
1965
1966                         /* unlock info */
1967                         SCTP_INP_INFO_WUNLOCK();
1968                         return (EADDRNOTAVAIL);
1969                 }
1970                 SCTP_INP_WLOCK(inp);
1971                 if (bindall) {
1972                         /* verify that no lport is not used by a singleton */
1973                         if (sctp_isport_inuse(inp, lport)) {
1974                                 /* Sorry someone already has this one bound */
1975                                 SCTP_INP_DECR_REF(inp);
1976                                 SCTP_INP_WUNLOCK(inp);
1977                                 SCTP_INP_INFO_WUNLOCK();
1978                                 return (EADDRNOTAVAIL);
1979                         }
1980                 }
1981         } else {
1982                 /*
1983                  * get any port but lets make sure no one has any address
1984                  * with this port bound
1985                  */
1986
1987                 /*
1988                  * setup the inp to the top (I could use the union but this
1989                  * is just as easy
1990                  */
1991                 uint32_t port_guess;
1992                 uint16_t port_attempt;
1993                 int not_done=1;
1994
1995                 while (not_done) {
1996                         port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
1997                         port_attempt = (port_guess &  0x0000ffff);
1998                         if (port_attempt == 0) {
1999                                 goto next_half;
2000                         }
2001                         if (port_attempt < IPPORT_RESERVED) {
2002                                 port_attempt += IPPORT_RESERVED;
2003                         }
2004
2005                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2006                                 /* got a port we can use */
2007                                 not_done = 0;
2008                                 continue;
2009                         }
2010                         /* try upper half */
2011                 next_half:
2012                         port_attempt = ((port_guess >> 16) &  0x0000ffff);
2013                         if (port_attempt == 0) {
2014                                 goto last_try;
2015                         }
2016                         if (port_attempt < IPPORT_RESERVED) {
2017                                 port_attempt += IPPORT_RESERVED;
2018                         }
2019                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2020                                 /* got a port we can use */
2021                                 not_done = 0;
2022                                 continue;
2023                         }
2024                         /* try two half's added together */
2025                 last_try:
2026                         port_attempt = (((port_guess >> 16) &  0x0000ffff) + (port_guess & 0x0000ffff));
2027                         if (port_attempt == 0) {
2028                                 /* get a new random number */
2029                                 continue;
2030                         }
2031                         if (port_attempt < IPPORT_RESERVED) {
2032                                 port_attempt += IPPORT_RESERVED;
2033                         }
2034                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2035                                 /* got a port we can use */
2036                                 not_done = 0;
2037                                 continue;
2038                         }
2039                 }
2040                 /* we don't get out of the loop until we have a port */
2041                 lport = htons(port_attempt);
2042         }
2043         SCTP_INP_DECR_REF(inp);
2044         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2045                 /* this really should not happen. The guy
2046                  * did a non-blocking bind and then did a close
2047                  * at the same time.
2048                  */
2049                 SCTP_INP_WUNLOCK(inp);
2050                 SCTP_INP_INFO_WUNLOCK();
2051                 return (EINVAL);
2052         }
2053         /* ok we look clear to give out this port, so lets setup the binding */
2054         if (bindall) {
2055                 /* binding to all addresses, so just set in the proper flags */
2056                 inp->sctp_flags |= (SCTP_PCB_FLAGS_BOUNDALL |
2057                     SCTP_PCB_FLAGS_DO_ASCONF);
2058                 /* set the automatic addr changes from kernel flag */
2059                 if (sctp_auto_asconf == 0) {
2060                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2061                 } else {
2062                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2063                 }
2064         } else {
2065                 /*
2066                  * bind specific, make sure flags is off and add a new address
2067                  * structure to the sctp_addr_list inside the ep structure.
2068                  *
2069                  * We will need to allocate one and insert it at the head.
2070                  * The socketopt call can just insert new addresses in there
2071                  * as well. It will also have to do the embed scope kame hack
2072                  * too (before adding).
2073                  */
2074                 struct ifaddr *ifa;
2075                 struct sockaddr_storage store_sa;
2076
2077                 memset(&store_sa, 0, sizeof(store_sa));
2078                 if (addr->sa_family == AF_INET) {
2079                         struct sockaddr_in *sin;
2080
2081                         sin = (struct sockaddr_in *)&store_sa;
2082                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2083                         sin->sin_port = 0;
2084                 } else if (addr->sa_family == AF_INET6) {
2085                         struct sockaddr_in6 *sin6;
2086
2087                         sin6 = (struct sockaddr_in6 *)&store_sa;
2088                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2089                         sin6->sin6_port = 0;
2090                 }
2091                 /*
2092                  * first find the interface with the bound address
2093                  * need to zero out the port to find the address! yuck!
2094                  * can't do this earlier since need port for sctp_pcb_findep()
2095                  */
2096                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
2097                 if (ifa == NULL) {
2098                         /* Can't find an interface with that address */
2099                         SCTP_INP_WUNLOCK(inp);
2100                         SCTP_INP_INFO_WUNLOCK();
2101                         return (EADDRNOTAVAIL);
2102                 }
2103                 if (addr->sa_family == AF_INET6) {
2104                         struct in6_ifaddr *ifa6;
2105                         ifa6 = (struct in6_ifaddr *)ifa;
2106                         /*
2107                          * allow binding of deprecated addresses as per
2108                          * RFC 2462 and ipng discussion
2109                          */
2110                         if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2111                             IN6_IFF_ANYCAST |
2112                             IN6_IFF_NOTREADY)) {
2113                                 /* Can't bind a non-existent addr. */
2114                                 SCTP_INP_WUNLOCK(inp);
2115                                 SCTP_INP_INFO_WUNLOCK();
2116                                 return (EINVAL);
2117                         }
2118                 }
2119                 /* we're not bound all */
2120                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2121 #if 0 /* use sysctl now */
2122                 /* don't allow automatic addr changes from kernel */
2123                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2124 #endif
2125                 /* set the automatic addr changes from kernel flag */
2126                 if (sctp_auto_asconf == 0) {
2127                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2128                 } else {
2129                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2130                 }
2131                 /* allow bindx() to send ASCONF's for binding changes */
2132                 inp->sctp_flags |= SCTP_PCB_FLAGS_DO_ASCONF;
2133                 /* add this address to the endpoint list */
2134                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
2135                 if (error != 0) {
2136                         SCTP_INP_WUNLOCK(inp);
2137                         SCTP_INP_INFO_WUNLOCK();
2138                         return (error);
2139                 }
2140                 inp->laddr_count++;
2141         }
2142         /* find the bucket */
2143         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2144             sctppcbinfo.hashmark)];
2145         /* put it in the bucket */
2146         LIST_INSERT_HEAD(head, inp, sctp_hash);
2147 #ifdef SCTP_DEBUG
2148         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2149                 printf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
2150         }
2151 #endif
2152         /* set in the port */
2153         inp->sctp_lport = lport;
2154
2155         /* turn off just the unbound flag */
2156         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2157         SCTP_INP_WUNLOCK(inp);
2158         SCTP_INP_INFO_WUNLOCK();
2159         return (0);
2160 }
2161
2162
2163 static void
2164 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2165 {
2166         struct sctp_iterator *it;
2167         /* We enter with the only the ITERATOR_LOCK in place and
2168          * A write lock on the inp_info stuff.
2169          */
2170
2171         /* Go through all iterators, we must do this since
2172          * it is possible that some iterator does NOT have
2173          * the lock, but is waiting for it. And the one that
2174          * had the lock has either moved in the last iteration
2175          * or we just cleared it above. We need to find all
2176          * of those guys. The list of iterators should never
2177          * be very big though.
2178          */
2179         LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2180                 if (it == inp->inp_starting_point_for_iterator)
2181                         /* skip this guy, he's special */
2182                         continue;
2183                 if (it->inp == inp) {
2184                         /* This is tricky and we DON'T lock the iterator.
2185                          * Reason is he's running but waiting for me since
2186                          * inp->inp_starting_point_for_iterator has the lock
2187                          * on me (the guy above we skipped). This tells us
2188                          * its is not running but waiting for inp->inp_starting_point_for_iterator
2189                          * to be released by the guy that does have our INP in a lock.
2190                          */
2191                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2192                                 it->inp = NULL;
2193                                 it->stcb = NULL;
2194                         } else {
2195                                 /* set him up to do the next guy not me */
2196                                 it->inp = inp_next;
2197                                 it->stcb = NULL;
2198                         }
2199                 }
2200         }
2201         it = inp->inp_starting_point_for_iterator;
2202         if (it) {
2203                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2204                         it->inp = NULL;
2205                 } else {
2206                         it->inp = inp_next;
2207                 }
2208                 it->stcb = NULL;
2209         }
2210 }
2211
2212 /* release sctp_inpcb unbind the port */
2213 void
2214 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate)
2215 {
2216         /*
2217          * Here we free a endpoint. We must find it (if it is in the Hash
2218          * table) and remove it from there. Then we must also find it in
2219          * the overall list and remove it from there. After all removals are
2220          * complete then any timer has to be stopped. Then start the actual
2221          * freeing.
2222          * a) Any local lists.
2223          * b) Any associations.
2224          * c) The hash of all associations.
2225          * d) finally the ep itself.
2226          */
2227         struct sctp_pcb *m;
2228         struct sctp_inpcb *inp_save;
2229         struct sctp_tcb *asoc, *nasoc;
2230         struct sctp_laddr *laddr, *nladdr;
2231         struct inpcb *ip_pcb;
2232         struct socket *so;
2233         struct sctp_socket_q_list *sq;
2234 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2235         struct rtentry *rt;
2236 #endif
2237         int cnt;
2238
2239         crit_enter();
2240         SCTP_ASOC_CREATE_LOCK(inp);
2241         SCTP_INP_WLOCK(inp);
2242
2243         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2244                 /* been here before */
2245                 crit_exit();
2246                 printf("Endpoint was all gone (dup free)?\n");
2247                 SCTP_INP_WUNLOCK(inp);
2248                 SCTP_ASOC_CREATE_UNLOCK(inp);
2249                 return;
2250         }
2251         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2252
2253         if (inp->control) {
2254                 sctp_m_freem(inp->control);
2255                 inp->control = NULL;
2256         }
2257         if (inp->pkt) {
2258                 sctp_m_freem(inp->pkt);
2259                 inp->pkt = NULL;
2260         }
2261         so  = inp->sctp_socket;
2262         m = &inp->sctp_ep;
2263         ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2264                                    * pointer here but I will
2265                                    * be nice :> (i.e. ip_pcb = ep;)
2266                                    */
2267
2268         if (immediate == 0) {
2269                 int cnt_in_sd;
2270                 cnt_in_sd = 0;
2271                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2272                      asoc = nasoc) {
2273                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2274                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2275                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2276                                 /* Just abandon things in the front states */
2277                                 SCTP_TCB_LOCK(asoc);
2278                                 SCTP_INP_WUNLOCK(inp);
2279                                 sctp_free_assoc(inp, asoc);
2280                                 SCTP_INP_WLOCK(inp);
2281                                 continue;
2282                         } else {
2283                                 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2284                         }
2285                         if ((asoc->asoc.size_on_delivery_queue  > 0) ||
2286                             (asoc->asoc.size_on_reasm_queue > 0) ||
2287                             (asoc->asoc.size_on_all_streams > 0) ||
2288                             (so && (so->so_rcv.sb_cc > 0))
2289                                 ) {
2290                                 /* Left with Data unread */
2291                                 struct mbuf *op_err;
2292                                 MGET(op_err, MB_DONTWAIT, MT_DATA);
2293                                 if (op_err) {
2294                                         /* Fill in the user initiated abort */
2295                                         struct sctp_paramhdr *ph;
2296                                         op_err->m_len =
2297                                             sizeof(struct sctp_paramhdr);
2298                                         ph = mtod(op_err,
2299                                             struct sctp_paramhdr *);
2300                                         ph->param_type = htons(
2301                                             SCTP_CAUSE_USER_INITIATED_ABT);
2302                                         ph->param_length = htons(op_err->m_len);
2303                                 }
2304                                 SCTP_TCB_LOCK(asoc);
2305                                 sctp_send_abort_tcb(asoc, op_err);
2306
2307                                 SCTP_INP_WUNLOCK(inp);
2308                                 sctp_free_assoc(inp, asoc);
2309                                 SCTP_INP_WLOCK(inp);
2310                                 continue;
2311                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2312                             TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2313                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2314                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2315                                         /* there is nothing queued to send, so I send shutdown */
2316                                         SCTP_TCB_LOCK(asoc);
2317                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2318                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2319                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2320                                                          asoc->asoc.primary_destination);
2321                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2322                                                          asoc->asoc.primary_destination);
2323                                         sctp_chunk_output(inp, asoc, 1);
2324                                         SCTP_TCB_UNLOCK(asoc);
2325                                 }
2326                         } else {
2327                                 /* mark into shutdown pending */
2328                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2329                         }
2330                         cnt_in_sd++;
2331                 }
2332                 /* now is there some left in our SHUTDOWN state? */
2333                 if (cnt_in_sd) {
2334                         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2335                         crit_exit();
2336                         SCTP_INP_WUNLOCK(inp);
2337                         SCTP_ASOC_CREATE_UNLOCK(inp);
2338                         return;
2339                 }
2340         }
2341 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2342         if (inp->refcount) {
2343                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2344                 SCTP_INP_WUNLOCK(inp);
2345                 SCTP_ASOC_CREATE_UNLOCK(inp);
2346                 return;
2347         }
2348 #endif
2349         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2350 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2351         rt = ip_pcb->inp_route.ro_rt;
2352 #endif
2353
2354         callout_stop(&inp->sctp_ep.signature_change.timer);
2355
2356         if (so) {
2357         /* First take care of socket level things */
2358 #ifdef IPSEC
2359 #ifdef __OpenBSD__
2360         /* XXX IPsec cleanup here */
2361                 crit_enter();
2362                 if (ip_pcb->inp_tdb_in)
2363                     TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2364                                  ip_pcb, inp_tdb_in_next);
2365                 if (ip_pcb->inp_tdb_out)
2366                     TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2367                                  inp_tdb_out_next);
2368                 if (ip_pcb->inp_ipsec_localid)
2369                     ipsp_reffree(ip_pcb->inp_ipsec_localid);
2370                 if (ip_pcb->inp_ipsec_remoteid)
2371                     ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2372                 if (ip_pcb->inp_ipsec_localcred)
2373                     ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2374                 if (ip_pcb->inp_ipsec_remotecred)
2375                     ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2376                 if (ip_pcb->inp_ipsec_localauth)
2377                     ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2378                 if (ip_pcb->inp_ipsec_remoteauth)
2379                     ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2380                 crit_exit();
2381 #else
2382                 ipsec4_delete_pcbpolicy(ip_pcb);
2383 #endif
2384 #endif /*IPSEC*/
2385 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2386                 ACCEPT_LOCK();
2387                 SOCK_LOCK(so);
2388 #endif
2389                 so->so_pcb = 0;
2390 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2391                 sotryfree(so);
2392 #else
2393                 sofree(so);
2394 #endif
2395         }
2396
2397         if (ip_pcb->inp_options) {
2398                 m_free(ip_pcb->inp_options);
2399                 ip_pcb->inp_options = 0;
2400         }
2401 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2402         if (rt) {
2403                 RTFREE(rt);
2404                 ip_pcb->inp_route.ro_rt = 0;
2405         }
2406 #endif
2407         if (ip_pcb->inp_moptions) {
2408                 ip_freemoptions(ip_pcb->inp_moptions);
2409                 ip_pcb->inp_moptions = 0;
2410         }
2411 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2412         inp->inp_vflag = 0;
2413 #else
2414         ip_pcb->inp_vflag = 0;
2415 #endif
2416
2417         /* Now the sctp_pcb things */
2418
2419         /*
2420          * free each asoc if it is not already closed/free. we can't use
2421          * the macro here since le_next will get freed as part of the
2422          * sctp_free_assoc() call.
2423          */
2424         cnt = 0;
2425         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2426              asoc = nasoc) {
2427                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2428                 SCTP_TCB_LOCK(asoc);
2429                 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2430                         struct mbuf *op_err;
2431                         MGET(op_err, MB_DONTWAIT, MT_DATA);
2432                         if (op_err) {
2433                                 /* Fill in the user initiated abort */
2434                                 struct sctp_paramhdr *ph;
2435                                 op_err->m_len = sizeof(struct sctp_paramhdr);
2436                                 ph = mtod(op_err, struct sctp_paramhdr *);
2437                                 ph->param_type = htons(
2438                                     SCTP_CAUSE_USER_INITIATED_ABT);
2439                                 ph->param_length = htons(op_err->m_len);
2440                         }
2441                         sctp_send_abort_tcb(asoc, op_err);
2442                 }
2443                 cnt++;
2444                 /*
2445                  * sctp_free_assoc() will call sctp_inpcb_free(),
2446                  * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2447                  * So, we clear it before sctp_free_assoc() making sure
2448                  * no double sctp_inpcb_free().
2449                  */
2450                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2451                 SCTP_INP_WUNLOCK(inp);
2452                 sctp_free_assoc(inp, asoc);
2453                 SCTP_INP_WLOCK(inp);
2454         }
2455         while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2456                 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2457                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2458                 sctppcbinfo.ipi_count_sockq--;
2459                 sctppcbinfo.ipi_gencnt_sockq++;
2460         }
2461         inp->sctp_socket = 0;
2462         /* Now first we remove ourselves from the overall list of all EP's */
2463
2464         /* Unlock inp first, need correct order */
2465         SCTP_INP_WUNLOCK(inp);
2466         /* now iterator lock */
2467         SCTP_ITERATOR_LOCK();
2468         /* now info lock */
2469         SCTP_INP_INFO_WLOCK();
2470         /* now reget the inp lock */
2471         SCTP_INP_WLOCK(inp);
2472
2473         inp_save = LIST_NEXT(inp, sctp_list);
2474         LIST_REMOVE(inp, sctp_list);
2475         /*
2476          * Now the question comes as to if this EP was ever bound at all.
2477          * If it was, then we must pull it out of the EP hash list.
2478          */
2479         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2480             SCTP_PCB_FLAGS_UNBOUND) {
2481                 /*
2482                  * ok, this guy has been bound. It's port is somewhere
2483                  * in the sctppcbinfo hash table. Remove it!
2484                  */
2485                 LIST_REMOVE(inp, sctp_hash);
2486         }
2487         /* fix any iterators only after out of the list */
2488         sctp_iterator_inp_being_freed(inp, inp_save);
2489         SCTP_ITERATOR_UNLOCK();
2490         /*
2491          * if we have an address list the following will free the list of
2492          * ifaddr's that are set into this ep. Again macro limitations here,
2493          * since the LIST_FOREACH could be a bad idea.
2494          */
2495         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2496              laddr = nladdr) {
2497                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2498                 LIST_REMOVE(laddr, sctp_nxt_addr);
2499                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2500                 sctppcbinfo.ipi_gencnt_laddr++;
2501                 sctppcbinfo.ipi_count_laddr--;
2502         }
2503         /* Now lets see about freeing the EP hash table. */
2504         if (inp->sctp_tcbhash != NULL) {
2505                 FREE(inp->sctp_tcbhash, M_PCB);
2506                 inp->sctp_tcbhash = 0;
2507         }
2508         SCTP_INP_WUNLOCK(inp);
2509         SCTP_ASOC_CREATE_UNLOCK(inp);
2510         SCTP_INP_LOCK_DESTROY(inp);
2511         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2512
2513         /* Now we must put the ep memory back into the zone pool */
2514         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2515         sctppcbinfo.ipi_count_ep--;
2516
2517         SCTP_INP_INFO_WUNLOCK();
2518         crit_exit();
2519 }
2520
2521
2522 struct sctp_nets *
2523 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2524 {
2525         struct sctp_nets *net;
2526         struct sockaddr_in *sin;
2527         struct sockaddr_in6 *sin6;
2528         /* use the peer's/remote port for lookup if unspecified */
2529         sin = (struct sockaddr_in *)addr;
2530         sin6 = (struct sockaddr_in6 *)addr;
2531 #if 0 /* why do we need to check the port for a nets list on an assoc? */
2532         if (stcb->rport != sin->sin_port) {
2533                 /* we cheat and just a sin for this test */
2534                 return (NULL);
2535         }
2536 #endif
2537         /* locate the address */
2538         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2539                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2540                         return (net);
2541         }
2542         return (NULL);
2543 }
2544
2545
2546 /*
2547  * add's a remote endpoint address, done with the INIT/INIT-ACK
2548  * as well as when a ASCONF arrives that adds it. It will also
2549  * initialize all the cwnd stats of stuff.
2550  */
2551 int
2552 sctp_is_address_on_local_host(struct sockaddr *addr)
2553 {
2554         struct ifnet *ifn;
2555         struct ifaddr *ifa;
2556         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2557                 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
2558                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2559                                 /* same family */
2560                                 if (addr->sa_family == AF_INET) {
2561                                         struct sockaddr_in *sin, *sin_c;
2562                                         sin = (struct sockaddr_in *)addr;
2563                                         sin_c = (struct sockaddr_in *)
2564                                             ifa->ifa_addr;
2565                                         if (sin->sin_addr.s_addr ==
2566                                             sin_c->sin_addr.s_addr) {
2567                                                 /* we are on the same machine */
2568                                                 return (1);
2569                                         }
2570                                 } else if (addr->sa_family == AF_INET6) {
2571                                         struct sockaddr_in6 *sin6, *sin_c6;
2572                                         sin6 = (struct sockaddr_in6 *)addr;
2573                                         sin_c6 = (struct sockaddr_in6 *)
2574                                             ifa->ifa_addr;
2575                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2576                                             &sin_c6->sin6_addr)) {
2577                                                 /* we are on the same machine */
2578                                                 return (1);
2579                                         }
2580                                 }
2581                         }
2582                 }
2583         }
2584         return (0);
2585 }
2586
2587 int
2588 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2589     int set_scope, int from)
2590 {
2591         /*
2592          * The following is redundant to the same lines in the
2593          * sctp_aloc_assoc() but is needed since other's call the add
2594          * address function
2595          */
2596         struct sctp_nets *net, *netfirst;
2597         int addr_inscope;
2598
2599 #ifdef SCTP_DEBUG
2600         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2601                 printf("Adding an address (from:%d) to the peer: ", from);
2602                 sctp_print_address(newaddr);
2603         }
2604 #endif
2605         netfirst = sctp_findnet(stcb, newaddr);
2606         if (netfirst) {
2607                 /*
2608                  * Lie and return ok, we don't want to make the association
2609                  * go away for this behavior. It will happen in the TCP model
2610                  * in a connected socket. It does not reach the hash table
2611                  * until after the association is built so it can't be found.
2612                  * Mark as reachable, since the initial creation will have
2613                  * been cleared and the NOT_IN_ASSOC flag will have been
2614                  * added... and we don't want to end up removing it back out.
2615                  */
2616                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2617                         netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2618                             SCTP_ADDR_UNCONFIRMED);
2619                 } else {
2620                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2621                 }
2622
2623                 return (0);
2624         }
2625         addr_inscope = 1;
2626         if (newaddr->sa_family == AF_INET) {
2627                 struct sockaddr_in *sin;
2628                 sin = (struct sockaddr_in *)newaddr;
2629                 if (sin->sin_addr.s_addr == 0) {
2630                         /* Invalid address */
2631                         return (-1);
2632                 }
2633                 /* zero out the bzero area */
2634                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2635
2636                 /* assure len is set */
2637                 sin->sin_len = sizeof(struct sockaddr_in);
2638                 if (set_scope) {
2639 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2640                         stcb->ipv4_local_scope = 1;
2641 #else
2642                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2643                                 stcb->asoc.ipv4_local_scope = 1;
2644                         }
2645 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2646
2647                         if (sctp_is_address_on_local_host(newaddr)) {
2648                                 stcb->asoc.loopback_scope = 1;
2649                                 stcb->asoc.ipv4_local_scope = 1;
2650                                 stcb->asoc.local_scope = 1;
2651                                 stcb->asoc.site_scope = 1;
2652                         }
2653                 } else {
2654                         if (from == 8) {
2655                                 /* From connectx */
2656                                 if (sctp_is_address_on_local_host(newaddr)) {
2657                                         stcb->asoc.loopback_scope = 1;
2658                                         stcb->asoc.ipv4_local_scope = 1;
2659                                         stcb->asoc.local_scope = 1;
2660                                         stcb->asoc.site_scope = 1;
2661                                 }
2662                         }
2663                         /* Validate the address is in scope */
2664                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2665                             (stcb->asoc.ipv4_local_scope == 0)) {
2666                                 addr_inscope = 0;
2667                         }
2668                 }
2669         } else if (newaddr->sa_family == AF_INET6) {
2670                 struct sockaddr_in6 *sin6;
2671                 sin6 = (struct sockaddr_in6 *)newaddr;
2672                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2673                         /* Invalid address */
2674                         return (-1);
2675                 }
2676                 /* assure len is set */
2677                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2678                 if (set_scope) {
2679                         if (sctp_is_address_on_local_host(newaddr)) {
2680                                 stcb->asoc.loopback_scope = 1;
2681                                 stcb->asoc.local_scope = 1;
2682                                 stcb->asoc.ipv4_local_scope = 1;
2683                                 stcb->asoc.site_scope = 1;
2684                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2685                                 /*
2686                                  * If the new destination is a LINK_LOCAL
2687                                  * we must have common site scope. Don't set
2688                                  * the local scope since we may not share all
2689                                  * links, only loopback can do this.
2690                                  * Links on the local network would also
2691                                  * be on our private network for v4 too.
2692                                  */
2693                                 stcb->asoc.ipv4_local_scope = 1;
2694                                 stcb->asoc.site_scope = 1;
2695                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2696                                 /*
2697                                  * If the new destination is SITE_LOCAL
2698                                  * then we must have site scope in common.
2699                                  */
2700                                 stcb->asoc.site_scope = 1;
2701                         }
2702                 } else {
2703                         if (from == 8) {
2704                                 /* From connectx */
2705                                 if (sctp_is_address_on_local_host(newaddr)) {
2706                                         stcb->asoc.loopback_scope = 1;
2707                                         stcb->asoc.ipv4_local_scope = 1;
2708                                         stcb->asoc.local_scope = 1;
2709                                         stcb->asoc.site_scope = 1;
2710                                 }
2711                         }
2712                         /* Validate the address is in scope */
2713                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2714                             (stcb->asoc.loopback_scope == 0)) {
2715                                 addr_inscope = 0;
2716                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2717                                    (stcb->asoc.local_scope == 0)) {
2718                                 addr_inscope = 0;
2719                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2720                                    (stcb->asoc.site_scope == 0)) {
2721                                 addr_inscope = 0;
2722                         }
2723                 }
2724         } else {
2725                 /* not supported family type */
2726                 return (-1);
2727         }
2728         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2729         if (net == NULL) {
2730                 return (-1);
2731         }
2732         sctppcbinfo.ipi_count_raddr++;
2733         sctppcbinfo.ipi_gencnt_raddr++;
2734         bzero(net, sizeof(*net));
2735         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2736         if (newaddr->sa_family == AF_INET) {
2737                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2738         } else if (newaddr->sa_family == AF_INET6) {
2739                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2740         }
2741         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2742         net->failure_threshold = stcb->asoc.def_net_failure;
2743         if (addr_inscope == 0) {
2744 #ifdef SCTP_DEBUG
2745                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2746                         printf("Adding an address which is OUT OF SCOPE\n");
2747                 }
2748 #endif /* SCTP_DEBUG */
2749                 net->dest_state = (SCTP_ADDR_REACHABLE |
2750                     SCTP_ADDR_OUT_OF_SCOPE);
2751         } else {
2752                 if (from == 8)
2753                         /* 8 is passed by connect_x */
2754                         net->dest_state = SCTP_ADDR_REACHABLE;
2755                 else
2756                         net->dest_state = SCTP_ADDR_REACHABLE |
2757                             SCTP_ADDR_UNCONFIRMED;
2758         }
2759         net->RTO = stcb->asoc.initial_rto;
2760         stcb->asoc.numnets++;
2761         net->ref_count = 1;
2762
2763         /* Init the timer structure */
2764 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2765         callout_init(&net->rxt_timer.timer, 0);
2766         callout_init(&net->pmtu_timer.timer, 0);
2767 #else
2768         callout_init(&net->rxt_timer.timer);
2769         callout_init(&net->pmtu_timer.timer);
2770 #endif
2771
2772         /* Now generate a route for this guy */
2773         /* KAME hack: embed scopeid */
2774         if (newaddr->sa_family == AF_INET6) {
2775                 struct sockaddr_in6 *sin6;
2776                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2777 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2778                 in6_embedscope(&sin6->sin6_addr, sin6,
2779                     &stcb->sctp_ep->ip_inp.inp, NULL);
2780 #else
2781                 in6_embedscope(&sin6->sin6_addr, sin6);
2782 #endif
2783 #ifndef SCOPEDROUTING
2784                 sin6->sin6_scope_id = 0;
2785 #endif
2786         }
2787 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2788         rtalloc_ign((struct route *)&net->ro, 0UL);
2789 #else
2790         rtalloc((struct route *)&net->ro);
2791 #endif
2792         if (newaddr->sa_family == AF_INET6) {
2793                 struct sockaddr_in6 *sin6;
2794                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2795                 in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2796         }
2797         if ((net->ro.ro_rt) &&
2798             (net->ro.ro_rt->rt_ifp)) {
2799                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2800                 if (from == 1) {
2801                         stcb->asoc.smallest_mtu = net->mtu;
2802                 }
2803                 /* start things off to match mtu of interface please. */
2804                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2805         } else {
2806                 net->mtu = stcb->asoc.smallest_mtu;
2807         }
2808         if (stcb->asoc.smallest_mtu > net->mtu) {
2809                 stcb->asoc.smallest_mtu = net->mtu;
2810         }
2811         /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2812          * We then limit this to 4 MTU's of sending.
2813          */
2814         net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2815
2816         /* we always get at LEAST 2 MTU's */
2817         if (net->cwnd < (2 * net->mtu)) {
2818                 net->cwnd = 2 * net->mtu;
2819         }
2820
2821         net->ssthresh = stcb->asoc.peers_rwnd;
2822
2823         net->src_addr_selected = 0;
2824         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2825         if (net->ro.ro_rt == NULL) {
2826                 /* Since we have no route put it at the back */
2827                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2828         } else if (netfirst == NULL) {
2829                 /* We are the first one in the pool. */
2830                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2831         } else if (netfirst->ro.ro_rt == NULL) {
2832                 /*
2833                  * First one has NO route. Place this one ahead of the
2834                  * first one.
2835                  */
2836                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2837         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2838                 /*
2839                  * This one has a different interface than the one at the
2840                  * top of the list. Place it ahead.
2841                  */
2842                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2843         } else {
2844                 /*
2845                  * Ok we have the same interface as the first one. Move
2846                  * forward until we find either
2847                  *   a) one with a NULL route... insert ahead of that
2848                  *   b) one with a different ifp.. insert after that.
2849                  *   c) end of the list.. insert at the tail.
2850                  */
2851                 struct sctp_nets *netlook;
2852                 do {
2853                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2854                         if (netlook == NULL) {
2855                                 /* End of the list */
2856                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2857                                     sctp_next);
2858                                 break;
2859                         } else if (netlook->ro.ro_rt == NULL) {
2860                                 /* next one has NO route */
2861                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2862                                 break;
2863                         } else if (netlook->ro.ro_rt->rt_ifp !=
2864                                    net->ro.ro_rt->rt_ifp) {
2865                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2866                                     net, sctp_next);
2867                                 break;
2868                         }
2869                         /* Shift forward */
2870                         netfirst = netlook;
2871                 } while (netlook != NULL);
2872         }
2873         /* got to have a primary set */
2874         if (stcb->asoc.primary_destination == 0) {
2875                 stcb->asoc.primary_destination = net;
2876         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2877                    (net->ro.ro_rt)) {
2878                 /* No route to current primary adopt new primary */
2879                 stcb->asoc.primary_destination = net;
2880         }
2881         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2882             net);
2883
2884         return (0);
2885 }
2886
2887
2888 /*
2889  * allocate an association and add it to the endpoint. The caller must
2890  * be careful to add all additional addresses once they are know right
2891  * away or else the assoc will be may experience a blackout scenario.
2892  */
2893 struct sctp_tcb *
2894 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2895     int for_a_init, int *error,  uint32_t override_tag)
2896 {
2897         struct sctp_tcb *stcb;
2898         struct sctp_association *asoc;
2899         struct sctpasochead *head;
2900         uint16_t rport;
2901         int err;
2902
2903         /*
2904          * Assumption made here:
2905          *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2906          *  to make sure the address does not exist already.
2907          */
2908         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2909                 /* Hit max assoc, sorry no more */
2910                 *error = ENOBUFS;
2911                 return (NULL);
2912         }
2913         SCTP_INP_RLOCK(inp);
2914         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2915                 /*
2916                  * If its in the TCP pool, its NOT allowed to create an
2917                  * association. The parent listener needs to call
2918                  * sctp_aloc_assoc.. or the one-2-many socket. If a
2919                  * peeled off, or connected one does this.. its an error.
2920                  */
2921                 SCTP_INP_RUNLOCK(inp);
2922                 *error = EINVAL;
2923                 return (NULL);
2924         }
2925
2926 #ifdef SCTP_DEBUG
2927         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2928                 printf("Allocate an association for peer:");
2929                 if (firstaddr)
2930                         sctp_print_address(firstaddr);
2931                 else
2932                         printf("None\n");
2933                 printf("Port:%d\n",
2934                        ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2935         }
2936 #endif /* SCTP_DEBUG */
2937         if (firstaddr->sa_family == AF_INET) {
2938                 struct sockaddr_in *sin;
2939                 sin = (struct sockaddr_in *)firstaddr;
2940                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2941                         /* Invalid address */
2942 #ifdef SCTP_DEBUG
2943                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2944                                 printf("peer address invalid\n");
2945                         }
2946 #endif
2947                         SCTP_INP_RUNLOCK(inp);
2948                         *error = EINVAL;
2949                         return (NULL);
2950                 }
2951                 rport = sin->sin_port;
2952         } else if (firstaddr->sa_family == AF_INET6) {
2953                 struct sockaddr_in6 *sin6;
2954                 sin6 = (struct sockaddr_in6 *)firstaddr;
2955                 if ((sin6->sin6_port == 0) ||
2956                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2957                         /* Invalid address */
2958 #ifdef SCTP_DEBUG
2959                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2960                                 printf("peer address invalid\n");
2961                         }
2962 #endif
2963                         SCTP_INP_RUNLOCK(inp);
2964                         *error = EINVAL;
2965                         return (NULL);
2966                 }
2967                 rport = sin6->sin6_port;
2968         } else {
2969                 /* not supported family type */
2970 #ifdef SCTP_DEBUG
2971                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2972                         printf("BAD family %d\n", firstaddr->sa_family);
2973                 }
2974 #endif
2975                 SCTP_INP_RUNLOCK(inp);
2976                 *error = EINVAL;
2977                 return (NULL);
2978         }
2979         SCTP_INP_RUNLOCK(inp);
2980         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2981                 /*
2982                  * If you have not performed a bind, then we need to do
2983                  * the ephemerial bind for you.
2984                  */
2985 #ifdef SCTP_DEBUG
2986                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2987                         printf("Doing implicit BIND\n");
2988                 }
2989 #endif
2990
2991                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2992                     (struct sockaddr *)NULL,
2993 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2994                                            (struct thread *)NULL
2995 #else
2996                                            (struct proc *)NULL
2997 #endif
2998                              ))){
2999                         /* bind error, probably perm */
3000 #ifdef SCTP_DEBUG
3001                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3002                                 printf("BIND FAILS ret:%d\n", err);
3003                         }
3004 #endif
3005
3006                         *error = err;
3007                         return (NULL);
3008                 }
3009         }
3010         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3011         if (stcb == NULL) {
3012                 /* out of memory? */
3013 #ifdef SCTP_DEBUG
3014                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3015                         printf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3016                 }
3017 #endif
3018                 *error = ENOMEM;
3019                 return (NULL);
3020         }
3021         sctppcbinfo.ipi_count_asoc++;
3022         sctppcbinfo.ipi_gencnt_asoc++;
3023
3024         bzero(stcb, sizeof(*stcb));
3025         asoc = &stcb->asoc;
3026         SCTP_TCB_LOCK_INIT(stcb);
3027         /* setup back pointer's */
3028         stcb->sctp_ep = inp;
3029         stcb->sctp_socket = inp->sctp_socket;
3030         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3031                 /* failed */
3032                 SCTP_TCB_LOCK_DESTROY (stcb);
3033                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3034                 sctppcbinfo.ipi_count_asoc--;
3035 #ifdef SCTP_DEBUG
3036                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3037                         printf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3038                 }
3039 #endif
3040                 *error = err;
3041                 return (NULL);
3042         }
3043         /* and the port */
3044         stcb->rport = rport;
3045         SCTP_INP_INFO_WLOCK();
3046         SCTP_INP_WLOCK(inp);
3047         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3048                 /* inpcb freed while alloc going on */
3049                 SCTP_TCB_LOCK_DESTROY (stcb);
3050                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3051                 SCTP_INP_WUNLOCK(inp);
3052                 SCTP_INP_INFO_WUNLOCK();
3053                 sctppcbinfo.ipi_count_asoc--;
3054 #ifdef SCTP_DEBUG
3055                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3056                         printf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3057                 }
3058 #endif
3059                 *error = EINVAL;
3060                 return (NULL);
3061         }
3062         SCTP_TCB_LOCK(stcb);
3063
3064         /* now that my_vtag is set, add it to the  hash */
3065         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3066              sctppcbinfo.hashasocmark)];
3067         /* put it in the bucket in the vtag hash of assoc's for the system */
3068         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3069         SCTP_INP_INFO_WUNLOCK();
3070
3071
3072         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3073                 /* failure.. memory error? */
3074                 if (asoc->strmout)
3075                         FREE(asoc->strmout, M_PCB);
3076                 if (asoc->mapping_array)
3077                         FREE(asoc->mapping_array, M_PCB);
3078
3079                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3080                 sctppcbinfo.ipi_count_asoc--;
3081 #ifdef SCTP_DEBUG
3082                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3083                         printf("aloc_assoc: couldn't add remote addr!\n");
3084                 }
3085 #endif
3086                 SCTP_TCB_LOCK_DESTROY (stcb);
3087                 *error = ENOBUFS;
3088                 return (NULL);
3089         }
3090         /* Init all the timers */
3091 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3092         callout_init(&asoc->hb_timer.timer, 0);
3093         callout_init(&asoc->dack_timer.timer, 0);
3094         callout_init(&asoc->asconf_timer.timer, 0);
3095         callout_init(&asoc->shut_guard_timer.timer, 0);
3096         callout_init(&asoc->autoclose_timer.timer, 0);
3097         callout_init(&asoc->delayed_event_timer.timer, 0);
3098 #else
3099         callout_init(&asoc->hb_timer.timer);
3100         callout_init(&asoc->dack_timer.timer);
3101         callout_init(&asoc->asconf_timer.timer);
3102         callout_init(&asoc->shut_guard_timer.timer);
3103         callout_init(&asoc->autoclose_timer.timer);
3104         callout_init(&asoc->delayed_event_timer.timer);
3105 #endif
3106         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3107         /* now file the port under the hash as well */
3108         if (inp->sctp_tcbhash != NULL) {
3109                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3110                    inp->sctp_hashmark)];
3111                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3112         }
3113         SCTP_INP_WUNLOCK(inp);
3114 #ifdef SCTP_DEBUG
3115         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3116                 printf("Association %p now allocated\n", stcb);
3117         }
3118 #endif
3119         return (stcb);
3120 }
3121
3122 void
3123 sctp_free_remote_addr(struct sctp_nets *net)
3124 {
3125         if (net == NULL)
3126                 return;
3127         net->ref_count--;
3128         if (net->ref_count <= 0) {
3129                 /* stop timer if running */
3130                 callout_stop(&net->rxt_timer.timer);
3131                 callout_stop(&net->pmtu_timer.timer);
3132                 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3133                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3134                 sctppcbinfo.ipi_count_raddr--;
3135         }
3136 }
3137
3138 /*
3139  * remove a remote endpoint address from an association, it
3140  * will fail if the address does not exist.
3141  */
3142 int
3143 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3144 {
3145         /*
3146          * Here we need to remove a remote address. This is quite simple, we
3147          * first find it in the list of address for the association
3148          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3149          * that item.
3150          * Note we do not allow it to be removed if there are no other
3151          * addresses.
3152          */
3153         struct sctp_association *asoc;
3154         struct sctp_nets *net, *net_tmp;
3155         asoc = &stcb->asoc;
3156         if (asoc->numnets < 2) {
3157                 /* Must have at LEAST two remote addresses */
3158                 return (-1);
3159         }
3160         /* locate the address */
3161         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3162                 net_tmp = TAILQ_NEXT(net, sctp_next);
3163                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3164                         continue;
3165                 }
3166                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3167                     remaddr)) {
3168                         /* we found the guy */
3169                         asoc->numnets--;
3170                         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3171                         sctp_free_remote_addr(net);
3172                         if (net == asoc->primary_destination) {
3173                                 /* Reset primary */
3174                                 struct sctp_nets *lnet;
3175                                 lnet = TAILQ_FIRST(&asoc->nets);
3176                                 /* Try to find a confirmed primary */
3177                                 asoc->primary_destination =
3178                                     sctp_find_alternate_net(stcb, lnet);
3179                         }
3180                         if (net == asoc->last_data_chunk_from) {
3181                                 /* Reset primary */
3182                                 asoc->last_data_chunk_from =
3183                                     TAILQ_FIRST(&asoc->nets);
3184                         }
3185                         if (net == asoc->last_control_chunk_from) {
3186                                 /* Reset primary */
3187                                 asoc->last_control_chunk_from =
3188                                     TAILQ_FIRST(&asoc->nets);
3189                         }
3190                         if (net == asoc->asconf_last_sent_to) {
3191                                 /* Reset primary */
3192                                 asoc->asconf_last_sent_to =
3193                                     TAILQ_FIRST(&asoc->nets);
3194                         }
3195                         return (0);
3196                 }
3197         }
3198         /* not found. */
3199         return (-2);
3200 }
3201
3202
3203 static void
3204 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3205 {
3206         struct sctpvtaghead *chain;
3207         struct sctp_tagblock *twait_block;
3208         struct timeval now;
3209         int set, i;
3210         SCTP_GETTIME_TIMEVAL(&now);
3211         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3212         set = 0;
3213         if (!LIST_EMPTY(chain)) {
3214                 /* Block(s) present, lets find space, and expire on the fly */
3215                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3216                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3217                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3218                                     !set) {
3219                                         twait_block->vtag_block[0].tv_sec_at_expire =
3220                                             now.tv_sec + SCTP_TIME_WAIT;
3221                                         twait_block->vtag_block[0].v_tag = tag;
3222                                         set = 1;
3223                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3224                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3225                                     now.tv_sec)) {
3226                                         /* Audit expires this guy */
3227                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3228                                         twait_block->vtag_block[i].v_tag = 0;
3229                                         if (set == 0) {
3230                                                 /* Reuse it for my new tag */
3231                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3232                                                 twait_block->vtag_block[0].v_tag = tag;
3233                                                 set = 1;
3234                                         }
3235                                 }
3236                         }
3237                         if (set) {
3238                                 /*
3239                                  * We only do up to the block where we can
3240                                  * place our tag for audits
3241                                  */
3242                                 break;
3243                         }
3244                 }
3245         }
3246         /* Need to add a new block to chain */
3247         if (!set) {
3248                 MALLOC(twait_block, struct sctp_tagblock *,
3249                        sizeof(struct sctp_tagblock), M_PCB, M_NOWAIT);
3250                 if (twait_block == NULL) {
3251                         return;
3252                 }
3253                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3254                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3255                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3256                     SCTP_TIME_WAIT;
3257                 twait_block->vtag_block[0].v_tag = tag;
3258         }
3259 }
3260
3261
3262 static void
3263 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3264 {
3265         struct sctp_iterator *it;
3266
3267
3268
3269         /* Unlock the tcb lock we do this so
3270          * we avoid a dead lock scenario where
3271          * the iterator is waiting on the TCB lock
3272          * and the TCB lock is waiting on the iterator
3273          * lock.
3274          */
3275         SCTP_ITERATOR_LOCK();
3276         SCTP_INP_INFO_WLOCK();
3277         SCTP_INP_WLOCK(inp);
3278         SCTP_TCB_LOCK(stcb);
3279
3280         it = stcb->asoc.stcb_starting_point_for_iterator;
3281         if (it == NULL) {
3282                 return;
3283         }
3284         if (it->inp != stcb->sctp_ep) {
3285                 /* hm, focused on the wrong one? */
3286                 return;
3287         }
3288         if (it->stcb != stcb) {
3289                 return;
3290         }
3291         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3292         if (it->stcb == NULL) {
3293                 /* done with all asoc's in this assoc */
3294                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3295                         it->inp = NULL;
3296                 } else {
3297
3298                         it->inp = LIST_NEXT(inp, sctp_list);
3299                 }
3300         }
3301 }
3302
3303 /*
3304  * Free the association after un-hashing the remote port.
3305  */
3306 void
3307 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3308 {
3309         struct sctp_association *asoc;
3310         struct sctp_nets *net, *prev;
3311         struct sctp_laddr *laddr;
3312         struct sctp_tmit_chunk *chk;
3313         struct sctp_asconf_addr *aparam;
3314         struct sctp_socket_q_list *sq;
3315
3316         /* first, lets purge the entry from the hash table. */
3317         crit_enter();
3318         if (stcb->asoc.state == 0) {
3319                 printf("Freeing already free association:%p - huh??\n",
3320                     stcb);
3321                 crit_exit();
3322                 return;
3323         }
3324         asoc = &stcb->asoc;
3325         asoc->state = 0;
3326         /* now clean up any other timers */
3327         callout_stop(&asoc->hb_timer.timer);
3328         callout_stop(&asoc->dack_timer.timer);
3329         callout_stop(&asoc->asconf_timer.timer);
3330         callout_stop(&asoc->shut_guard_timer.timer);
3331         callout_stop(&asoc->autoclose_timer.timer);
3332         callout_stop(&asoc->delayed_event_timer.timer);
3333         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3334                 callout_stop(&net->rxt_timer.timer);
3335                 callout_stop(&net->pmtu_timer.timer);
3336         }
3337
3338         /* Iterator asoc being freed we send an
3339          * unlocked TCB. It returns with INP_INFO
3340          * and INP write locked and the TCB locked
3341          * too and of course the iterator lock
3342          * in place as well..
3343          */
3344         SCTP_TCB_UNLOCK(stcb);
3345         sctp_iterator_asoc_being_freed(inp, stcb);
3346
3347         /* Null all of my entry's on the socket q */
3348         TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3349                 if (sq->tcb == stcb) {
3350                         sq->tcb = NULL;
3351                 }
3352         }
3353
3354         if (inp->sctp_tcb_at_block == (void *)stcb) {
3355                 inp->error_on_block = ECONNRESET;
3356         }
3357
3358         if (inp->sctp_tcbhash) {
3359                 LIST_REMOVE(stcb, sctp_tcbhash);
3360         }
3361         /* Now lets remove it from the list of ALL associations in the EP */
3362         LIST_REMOVE(stcb, sctp_tcblist);
3363         SCTP_INP_WUNLOCK(inp);
3364         SCTP_ITERATOR_UNLOCK();
3365
3366
3367         /* pull from vtag hash */
3368         LIST_REMOVE(stcb, sctp_asocs);
3369
3370         /*
3371          * Now before we can free the assoc, we must  remove all of the
3372          * networks and any other allocated space.. i.e. add removes here
3373          * before the SCTP_ZONE_FREE() of the tasoc entry.
3374          */
3375
3376         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3377         SCTP_INP_INFO_WUNLOCK();
3378         prev = NULL;
3379         while (!TAILQ_EMPTY(&asoc->nets)) {
3380                 net = TAILQ_FIRST(&asoc->nets);
3381                 /* pull from list */
3382                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3383                         break;
3384                 }
3385                 prev = net;
3386                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3387                 /* free it */
3388                 net->ref_count = 0;
3389                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3390                 sctppcbinfo.ipi_count_raddr--;
3391         }
3392         /*
3393          * The chunk lists and such SHOULD be empty but we check them
3394          * just in case.
3395          */
3396         /* anything on the wheel needs to be removed */
3397         while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3398                 struct sctp_stream_out *outs;
3399                 outs = TAILQ_FIRST(&asoc->out_wheel);
3400                 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3401                 /* now clean up any chunks here */
3402                 chk = TAILQ_FIRST(&outs->outqueue);
3403                 while (chk) {
3404                         TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3405                         if (chk->data) {
3406                                 sctp_m_freem(chk->data);
3407                                 chk->data = NULL;
3408                         }
3409                         chk->whoTo = NULL;
3410                         chk->asoc = NULL;
3411                         /* Free the chunk */
3412                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3413                         sctppcbinfo.ipi_count_chunk--;
3414                         sctppcbinfo.ipi_gencnt_chunk++;
3415                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3416                                 panic("Chunk count is negative");
3417                         }
3418                         chk = TAILQ_FIRST(&outs->outqueue);
3419                 }
3420                 outs = TAILQ_FIRST(&asoc->out_wheel);
3421         }
3422
3423         if (asoc->pending_reply) {
3424                 FREE(asoc->pending_reply, M_PCB);
3425                 asoc->pending_reply = NULL;
3426         }
3427         chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3428         while (chk) {
3429                 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3430                 if (chk->data) {
3431                         sctp_m_freem(chk->data);
3432                         chk->data = NULL;
3433                 }
3434                 chk->whoTo = NULL;
3435                 chk->asoc = NULL;
3436                 /* Free the chunk */
3437                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3438                 sctppcbinfo.ipi_count_chunk--;
3439                 sctppcbinfo.ipi_gencnt_chunk++;
3440                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3441                         panic("Chunk count is negative");
3442                 }
3443                 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3444         }
3445         /* pending send queue SHOULD be empty */
3446         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3447                 chk = TAILQ_FIRST(&asoc->send_queue);
3448                 while (chk) {
3449                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3450                         if (chk->data) {
3451                                 sctp_m_freem(chk->data);
3452                                 chk->data = NULL;
3453                         }
3454                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3455                         sctppcbinfo.ipi_count_chunk--;
3456                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3457                                 panic("Chunk count is negative");
3458                         }
3459                         sctppcbinfo.ipi_gencnt_chunk++;
3460                         chk = TAILQ_FIRST(&asoc->send_queue);
3461                 }
3462         }
3463         /* sent queue SHOULD be empty */
3464         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3465                 chk = TAILQ_FIRST(&asoc->sent_queue);
3466                 while (chk) {
3467                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3468                         if (chk->data) {
3469                                 sctp_m_freem(chk->data);
3470                                 chk->data = NULL;
3471                         }
3472                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3473                         sctppcbinfo.ipi_count_chunk--;
3474                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3475                                 panic("Chunk count is negative");
3476                         }
3477                         sctppcbinfo.ipi_gencnt_chunk++;
3478                         chk = TAILQ_FIRST(&asoc->sent_queue);
3479                 }
3480         }
3481         /* control queue MAY not be empty */
3482         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3483                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3484                 while (chk) {
3485                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3486                         if (chk->data) {
3487                                 sctp_m_freem(chk->data);
3488                                 chk->data = NULL;
3489                         }
3490                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3491                         sctppcbinfo.ipi_count_chunk--;
3492                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3493                                 panic("Chunk count is negative");
3494                         }
3495                         sctppcbinfo.ipi_gencnt_chunk++;
3496                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3497                 }
3498         }
3499         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3500                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3501                 while (chk) {
3502                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3503                         if (chk->data) {
3504                                 sctp_m_freem(chk->data);
3505                                 chk->data = NULL;
3506                         }
3507                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3508                         sctppcbinfo.ipi_count_chunk--;
3509                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3510                                 panic("Chunk count is negative");
3511                         }
3512                         sctppcbinfo.ipi_gencnt_chunk++;
3513                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3514                 }
3515         }
3516         if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3517                 chk = TAILQ_FIRST(&asoc->delivery_queue);
3518                 while (chk) {
3519                         TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3520                         if (chk->data) {
3521                                 sctp_m_freem(chk->data);
3522                                 chk->data = NULL;
3523                         }
3524                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3525                         sctppcbinfo.ipi_count_chunk--;
3526                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3527                                 panic("Chunk count is negative");
3528                         }
3529                         sctppcbinfo.ipi_gencnt_chunk++;
3530                         chk = TAILQ_FIRST(&asoc->delivery_queue);
3531                 }
3532         }
3533         if (asoc->mapping_array) {
3534                 FREE(asoc->mapping_array, M_PCB);
3535                 asoc->mapping_array = NULL;
3536         }
3537
3538         /* the stream outs */
3539         if (asoc->strmout) {
3540                 FREE(asoc->strmout, M_PCB);
3541                 asoc->strmout = NULL;
3542         }
3543         asoc->streamoutcnt = 0;
3544         if (asoc->strmin) {
3545                 int i;
3546                 for (i = 0; i < asoc->streamincnt; i++) {
3547                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3548                                 /* We have somethings on the streamin queue */
3549                                 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3550                                 while (chk) {
3551                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3552                                             chk, sctp_next);
3553                                         if (chk->data) {
3554                                                 sctp_m_freem(chk->data);
3555                                                 chk->data = NULL;
3556                                         }
3557                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3558                                             chk);
3559                                         sctppcbinfo.ipi_count_chunk--;
3560                                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3561                                                 panic("Chunk count is negative");
3562                                         }
3563                                         sctppcbinfo.ipi_gencnt_chunk++;
3564                                         chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3565                                 }
3566                         }
3567                 }
3568                 FREE(asoc->strmin, M_PCB);
3569                 asoc->strmin = NULL;
3570         }
3571         asoc->streamincnt = 0;
3572         /* local addresses, if any */
3573         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3574                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3575                 LIST_REMOVE(laddr, sctp_nxt_addr);
3576                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3577                 sctppcbinfo.ipi_count_laddr--;
3578         }
3579         /* pending asconf (address) parameters */
3580         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3581                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3582                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3583                 FREE(aparam, M_PCB);
3584         }
3585         if (asoc->last_asconf_ack_sent != NULL) {
3586                 sctp_m_freem(asoc->last_asconf_ack_sent);
3587                 asoc->last_asconf_ack_sent = NULL;
3588         }
3589         /* Insert new items here :> */
3590
3591         /* Get rid of LOCK */
3592         SCTP_TCB_LOCK_DESTROY(stcb);
3593
3594         /* now clean up the tasoc itself */
3595         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3596         sctppcbinfo.ipi_count_asoc--;
3597         if ((inp->sctp_socket->so_snd.sb_cc) ||
3598             (inp->sctp_socket->so_snd.sb_mbcnt)) {
3599                 /* This will happen when a abort is done */
3600                 inp->sctp_socket->so_snd.sb_cc = 0;
3601                 inp->sctp_socket->so_snd.sb_mbcnt = 0;
3602         }
3603         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3604                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3605                         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3606                                 /*
3607                                  * For the base fd, that is NOT in TCP pool we
3608                                  * turn off the connected flag. This allows
3609                                  * non-listening endpoints to connect/shutdown/
3610                                  * connect.
3611                                  */
3612                                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3613                                 soisdisconnected(inp->sctp_socket);
3614                         }
3615                         /*
3616                          * For those that are in the TCP pool we just leave
3617                          * so it cannot be used. When they close the fd we
3618                          * will free it all.
3619                          */
3620                 }
3621         }
3622         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3623                 sctp_inpcb_free(inp, 0);
3624         }
3625         crit_exit();
3626 }
3627
3628
3629 /*
3630  * determine if a destination is "reachable" based upon the addresses
3631  * bound to the current endpoint (e.g. only v4 or v6 currently bound)
3632  */
3633 /*
3634  * FIX: if we allow assoc-level bindx(), then this needs to be fixed
3635  * to use assoc level v4/v6 flags, as the assoc *may* not have the
3636  * same address types bound as its endpoint
3637  */
3638 int
3639 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
3640 {
3641         struct sctp_inpcb *inp;
3642         int answer;
3643
3644         /* No locks here, the TCB, in all cases is already
3645          * locked and an assoc is up. There is either a
3646          * INP lock by the caller applied (in asconf case when
3647          * deleting an address) or NOT in the HB case, however
3648          * if HB then the INP increment is up and the INP
3649          * will not be removed (on top of the fact that
3650          * we have a TCB lock). So we only want to
3651          * read the sctp_flags, which is either bound-all
3652          * or not.. no protection needed since once an
3653          * assoc is up you can't be changing your binding.
3654          */
3655         inp = stcb->sctp_ep;
3656         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3657                 /* if bound all, destination is not restricted */
3658                 /* RRS: Question during lock work: Is this
3659                  * correct? If you are bound-all you still
3660                  * might need to obey the V4--V6 flags???
3661                  * IMO this bound-all stuff needs to be removed!
3662                  */
3663                 return (1);
3664         }
3665         /* NOTE: all "scope" checks are done when local addresses are added */
3666         if (destaddr->sa_family == AF_INET6) {
3667 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3668                 answer = inp->inp_vflag & INP_IPV6;
3669 #else
3670                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
3671 #endif
3672         } else if (destaddr->sa_family == AF_INET) {
3673 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3674                 answer = inp->inp_vflag & INP_IPV4;
3675 #else
3676                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
3677 #endif
3678         } else {
3679                 /* invalid family, so it's unreachable */
3680                 answer = 0;
3681         }
3682         return (answer);
3683 }
3684
3685 /*
3686  * update the inp_vflags on an endpoint
3687  */
3688 static void
3689 sctp_update_ep_vflag(struct sctp_inpcb *inp) {
3690         struct sctp_laddr *laddr;
3691
3692         /* first clear the flag */
3693 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3694         inp->inp_vflag = 0;
3695 #else
3696         inp->ip_inp.inp.inp_vflag = 0;
3697 #endif
3698         /* set the flag based on addresses on the ep list */
3699         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3700                 if (laddr->ifa == NULL) {
3701 #ifdef SCTP_DEBUG
3702                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3703                                 printf("An ounce of prevention is worth a pound of cure\n");
3704                         }
3705 #endif /* SCTP_DEBUG */
3706                         continue;
3707                 }
3708                 if (laddr->ifa->ifa_addr) {
3709                         continue;
3710                 }
3711                 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
3712 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3713                         inp->inp_vflag |= INP_IPV6;
3714 #else
3715                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3716 #endif
3717                 } else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
3718 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3719                         inp->inp_vflag |= INP_IPV4;
3720 #else
3721                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3722 #endif
3723                 }
3724         }
3725 }
3726
3727 /*
3728  * Add the address to the endpoint local address list
3729  * There is nothing to be done if we are bound to all addresses
3730  */
3731 int
3732 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3733 {
3734         struct sctp_laddr *laddr;
3735         int fnd, error;
3736         fnd = 0;
3737
3738         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3739                 /* You are already bound to all. You have it already */
3740                 return (0);
3741         }
3742         if (ifa->ifa_addr->sa_family == AF_INET6) {
3743                 struct in6_ifaddr *ifa6;
3744                 ifa6 = (struct in6_ifaddr *)ifa;
3745                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3746                     IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
3747                         /* Can't bind a non-existent addr. */
3748                         return (-1);
3749         }
3750         /* first, is it already present? */
3751         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3752                 if (laddr->ifa == ifa) {
3753                         fnd = 1;
3754                         break;
3755                 }
3756         }
3757
3758         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
3759                 /* Not bound to all */
3760                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
3761                 if (error != 0)
3762                         return (error);
3763                 inp->laddr_count++;
3764                 /* update inp_vflag flags */
3765                 if (ifa->ifa_addr->sa_family == AF_INET6) {
3766 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3767                         inp->inp_vflag |= INP_IPV6;
3768 #else
3769                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3770 #endif
3771                 } else if (ifa->ifa_addr->sa_family == AF_INET) {
3772 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3773                         inp->inp_vflag |= INP_IPV4;
3774 #else
3775                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3776 #endif
3777                 }
3778         }
3779         return (0);
3780 }
3781
3782
3783 /*
3784  * select a new (hopefully reachable) destination net
3785  * (should only be used when we deleted an ep addr that is the
3786  * only usable source address to reach the destination net)
3787  */
3788 static void
3789 sctp_select_primary_destination(struct sctp_tcb *stcb)
3790 {
3791         struct sctp_nets *net;
3792
3793         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3794                 /* for now, we'll just pick the first reachable one we find */
3795                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
3796                         continue;
3797                 if (sctp_destination_is_reachable(stcb,
3798                     (struct sockaddr *)&net->ro._l_addr)) {
3799                         /* found a reachable destination */
3800                         stcb->asoc.primary_destination = net;
3801                 }
3802         }
3803         /* I can't there from here! ...we're gonna die shortly... */
3804 }
3805
3806
3807 /*
3808  * Delete the address from the endpoint local address list
3809  * There is nothing to be done if we are bound to all addresses
3810  */
3811 int
3812 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3813 {
3814         struct sctp_laddr *laddr;
3815         int fnd;
3816         fnd = 0;
3817         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3818                 /* You are already bound to all. You have it already */
3819                 return (EINVAL);
3820         }
3821
3822         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3823                 if (laddr->ifa == ifa) {
3824                         fnd = 1;
3825                         break;
3826                 }
3827         }
3828         if (fnd && (inp->laddr_count < 2)) {
3829                 /* can't delete unless there are at LEAST 2 addresses */
3830                 return (-1);
3831         }
3832         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
3833                 /*
3834                  * clean up any use of this address
3835                  * go through our associations and clear any
3836                  *  last_used_address that match this one
3837                  * for each assoc, see if a new primary_destination is needed
3838                  */
3839                 struct sctp_tcb *stcb;
3840
3841                 /* clean up "next_addr_touse" */
3842                 if (inp->next_addr_touse == laddr)
3843                         /* delete this address */
3844                         inp->next_addr_touse = NULL;
3845
3846                 /* clean up "last_used_address" */
3847                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3848                         if (stcb->asoc.last_used_address == laddr)
3849                                 /* delete this address */
3850                                 stcb->asoc.last_used_address = NULL;
3851                 } /* for each tcb */
3852
3853                 /* remove it from the ep list */
3854                 sctp_remove_laddr(laddr);
3855                 inp->laddr_count--;
3856                 /* update inp_vflag flags */
3857                 sctp_update_ep_vflag(inp);
3858                 /* select a new primary destination if needed */
3859                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3860                         /* presume caller (sctp_asconf.c) already owns INP lock */
3861                         SCTP_TCB_LOCK(stcb);
3862                         if (sctp_destination_is_reachable(stcb,
3863                             (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr) == 0) {
3864                                 sctp_select_primary_destination(stcb);
3865                         }
3866                         SCTP_TCB_UNLOCK(stcb);
3867                 } /* for each tcb */
3868         }
3869         return (0);
3870 }
3871
3872 /*
3873  * Add the addr to the TCB local address list
3874  * For the BOUNDALL or dynamic case, this is a "pending" address list
3875  * (eg. addresses waiting for an ASCONF-ACK response)
3876  * For the subset binding, static case, this is a "valid" address list
3877  */
3878 int
3879 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3880 {
3881         struct sctp_inpcb *inp;
3882         struct sctp_laddr *laddr;
3883         int error;
3884
3885         /* Assumes TCP is locked.. and possiblye
3886          * the INP. May need to confirm/fix that if
3887          * we need it and is not the case.
3888          */
3889         inp = stcb->sctp_ep;
3890         if (ifa->ifa_addr->sa_family == AF_INET6) {
3891                 struct in6_ifaddr *ifa6;
3892                 ifa6 = (struct in6_ifaddr *)ifa;
3893                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3894                     /* IN6_IFF_DEPRECATED | */
3895                     IN6_IFF_ANYCAST |
3896                     IN6_IFF_NOTREADY))
3897                         /* Can't bind a non-existent addr. */
3898                         return (-1);
3899         }
3900         /* does the address already exist? */
3901         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3902                 if (laddr->ifa == ifa) {
3903                         return (-1);
3904                 }
3905         }
3906
3907         /* add to the list */
3908         error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
3909         if (error != 0)
3910                 return (error);
3911         return (0);
3912 }
3913
3914 /*
3915  * insert an laddr entry with the given ifa for the desired list
3916  */
3917 int
3918 sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa) {
3919         struct sctp_laddr *laddr;
3920
3921         crit_enter();
3922         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
3923         if (laddr == NULL) {
3924                 /* out of memory? */
3925                 crit_exit();
3926                 return (EINVAL);
3927         }
3928         sctppcbinfo.ipi_count_laddr++;
3929         sctppcbinfo.ipi_gencnt_laddr++;
3930         bzero(laddr, sizeof(*laddr));
3931         laddr->ifa = ifa;
3932         /* insert it */
3933         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
3934
3935         crit_exit();
3936         return (0);
3937 }
3938
3939 /*
3940  * Remove an laddr entry from the local address list (on an assoc)
3941  */
3942 void
3943 sctp_remove_laddr(struct sctp_laddr *laddr)
3944 {
3945         crit_enter();
3946         /* remove from the list */
3947         LIST_REMOVE(laddr, sctp_nxt_addr);
3948         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3949         sctppcbinfo.ipi_count_laddr--;
3950         sctppcbinfo.ipi_gencnt_laddr++;
3951         crit_exit();
3952 }
3953
3954 /*
3955  * Remove an address from the TCB local address list
3956  */
3957 int
3958 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3959 {
3960         struct sctp_inpcb *inp;
3961         struct sctp_laddr *laddr;
3962
3963         /* This is called by asconf work. It is assumed that
3964          * a) The TCB is locked
3965          * and
3966          * b) The INP is locked.
3967          * This is true in as much as I can trace through
3968          * the entry asconf code where I did these locks.
3969          * Again, the ASCONF code is a bit different in
3970          * that it does lock the INP during its work often
3971          * times. This must be since we don't want other
3972          * proc's looking up things while what they are
3973          * looking up is changing :-D
3974          */
3975
3976         inp = stcb->sctp_ep;
3977         /* if subset bound and don't allow ASCONF's, can't delete last */
3978         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
3979             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
3980                 if (stcb->asoc.numnets < 2) {
3981                         /* can't delete last address */
3982                         return (-1);
3983                 }
3984         }
3985
3986         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3987                 /* remove the address if it exists */
3988                 if (laddr->ifa == NULL)
3989                         continue;
3990                 if (laddr->ifa == ifa) {
3991                         sctp_remove_laddr(laddr);
3992                         return (0);
3993                 }
3994         }
3995
3996         /* address not found! */
3997         return (-1);
3998 }
3999
4000 /*
4001  * Remove an address from the TCB local address list
4002  * lookup using a sockaddr addr
4003  */
4004 int
4005 sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
4006 {
4007         struct sctp_inpcb *inp;
4008         struct sctp_laddr *laddr;
4009         struct sockaddr *l_sa;
4010
4011         /*
4012          * This function I find does not seem to have a caller.
4013          * As such we NEED TO DELETE this code. If we do
4014          * find a caller, the caller MUST have locked the TCB
4015          * at the least and probably the INP as well.
4016          */
4017         inp = stcb->sctp_ep;
4018         /* if subset bound and don't allow ASCONF's, can't delete last */
4019         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4020             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4021                 if (stcb->asoc.numnets < 2) {
4022                         /* can't delete last address */
4023                         return (-1);
4024                 }
4025         }
4026
4027         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4028                 /* make sure the address exists */
4029                 if (laddr->ifa == NULL)
4030                         continue;
4031                 if (laddr->ifa->ifa_addr == NULL)
4032                         continue;
4033
4034                 l_sa = laddr->ifa->ifa_addr;
4035                 if (l_sa->sa_family == AF_INET6) {
4036                         /* IPv6 address */
4037                         struct sockaddr_in6 *sin1, *sin2;
4038                         sin1 = (struct sockaddr_in6 *)l_sa;
4039                         sin2 = (struct sockaddr_in6 *)sa;
4040                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4041                             sizeof(struct in6_addr)) == 0) {
4042                                 /* matched */
4043                                 sctp_remove_laddr(laddr);
4044                                 return (0);
4045                         }
4046                 } else if (l_sa->sa_family == AF_INET) {
4047                         /* IPv4 address */
4048                         struct sockaddr_in *sin1, *sin2;
4049                         sin1 = (struct sockaddr_in *)l_sa;
4050                         sin2 = (struct sockaddr_in *)sa;
4051                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4052                                 /* matched */
4053                                 sctp_remove_laddr(laddr);
4054                                 return (0);
4055                         }
4056                 } else {
4057                         /* invalid family */
4058                         return (-1);
4059                 }
4060         } /* end foreach */
4061         /* address not found! */
4062         return (-1);
4063 }
4064
4065 static char sctp_pcb_initialized = 0;
4066
4067 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4068 /* sysctl */
4069 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4070 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4071
4072 #endif /* FreeBSD || APPLE || DragonFly */
4073
4074 #ifndef SCTP_TCBHASHSIZE
4075 #define SCTP_TCBHASHSIZE 1024
4076 #endif
4077
4078 #ifndef SCTP_CHUNKQUEUE_SCALE
4079 #define SCTP_CHUNKQUEUE_SCALE 10
4080 #endif
4081
4082 void
4083 sctp_pcb_init(void)
4084 {
4085         /*
4086          * SCTP initialization for the PCB structures
4087          * should be called by the sctp_init() funciton.
4088          */
4089         int i;
4090         int hashtblsize = SCTP_TCBHASHSIZE;
4091
4092 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4093         int sctp_chunkscale = SCTP_CHUNKQUEUE_SCALE;
4094 #endif
4095
4096         if (sctp_pcb_initialized != 0) {
4097                 /* error I was called twice */
4098                 return;
4099         }
4100         sctp_pcb_initialized = 1;
4101
4102         /* Init all peg counts */
4103         for (i = 0; i < SCTP_NUMBER_OF_PEGS; i++) {
4104                 sctp_pegs[i] = 0;
4105         }
4106
4107         /* init the empty list of (All) Endpoints */
4108         LIST_INIT(&sctppcbinfo.listhead);
4109
4110         /* init the iterator head */
4111         LIST_INIT(&sctppcbinfo.iteratorhead);
4112
4113         /* init the hash table of endpoints */
4114 #if defined(__FreeBSD__)
4115 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
4116         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &hashtblsize);
4117         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4118         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4119 #else
4120         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
4121             hashtblsize);
4122         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
4123             sctp_pcbtblsize);
4124         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
4125             sctp_chunkscale);
4126 #endif
4127 #endif
4128
4129         sctppcbinfo.sctp_asochash = hashinit((hashtblsize * 31),
4130 #ifdef __NetBSD__
4131             HASH_LIST,
4132 #endif
4133             M_PCB,
4134 #if defined(__NetBSD__) || defined(__OpenBSD__)
4135             M_WAITOK,
4136 #endif
4137             &sctppcbinfo.hashasocmark);
4138
4139         sctppcbinfo.sctp_ephash = hashinit(hashtblsize,
4140 #ifdef __NetBSD__
4141             HASH_LIST,
4142 #endif
4143             M_PCB,
4144 #if defined(__NetBSD__) || defined(__OpenBSD__)
4145             M_WAITOK,
4146 #endif
4147             &sctppcbinfo.hashmark);
4148
4149         sctppcbinfo.sctp_tcpephash = hashinit(hashtblsize,
4150 #ifdef __NetBSD__
4151             HASH_LIST,
4152 #endif
4153             M_PCB,
4154 #if defined(__NetBSD__) || defined(__OpenBSD__)
4155             M_WAITOK,
4156 #endif
4157             &sctppcbinfo.hashtcpmark);
4158
4159         sctppcbinfo.hashtblsize = hashtblsize;
4160
4161         /* init the zones */
4162         /*
4163          * FIX ME: Should check for NULL returns, but if it does fail we
4164          * are doomed to panic anyways... add later maybe.
4165          */
4166         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4167             sizeof(struct sctp_inpcb), maxsockets);
4168
4169         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4170             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4171
4172         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4173             sizeof(struct sctp_laddr),
4174             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4175
4176         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4177             sizeof(struct sctp_nets),
4178             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4179
4180         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4181             sizeof(struct sctp_tmit_chunk),
4182             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4183             sctp_chunkscale));
4184
4185         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_sockq, "sctp_sockq",
4186             sizeof(struct sctp_socket_q_list),
4187             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4188             sctp_chunkscale));
4189
4190         /* Master Lock INIT for info structure */
4191         SCTP_INP_INFO_LOCK_INIT();
4192         SCTP_ITERATOR_LOCK_INIT();
4193         /* not sure if we need all the counts */
4194         sctppcbinfo.ipi_count_ep = 0;
4195         sctppcbinfo.ipi_gencnt_ep = 0;
4196         /* assoc/tcb zone info */
4197         sctppcbinfo.ipi_count_asoc = 0;
4198         sctppcbinfo.ipi_gencnt_asoc = 0;
4199         /* local addrlist zone info */
4200         sctppcbinfo.ipi_count_laddr = 0;
4201         sctppcbinfo.ipi_gencnt_laddr = 0;
4202         /* remote addrlist zone info */
4203         sctppcbinfo.ipi_count_raddr = 0;
4204         sctppcbinfo.ipi_gencnt_raddr = 0;
4205         /* chunk info */
4206         sctppcbinfo.ipi_count_chunk = 0;
4207         sctppcbinfo.ipi_gencnt_chunk = 0;
4208
4209         /* socket queue zone info */
4210         sctppcbinfo.ipi_count_sockq = 0;
4211         sctppcbinfo.ipi_gencnt_sockq = 0;
4212
4213         /* mbuf tracker */
4214         sctppcbinfo.mbuf_track = 0;
4215         /* port stuff */
4216 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) \
4217     || defined(__DragonFly__)
4218         sctppcbinfo.lastlow = ipport_firstauto;
4219 #else
4220         sctppcbinfo.lastlow = anonportmin;
4221 #endif
4222         /* Init the TIMEWAIT list */
4223         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4224                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4225         }
4226
4227 #if defined(_SCTP_NEEDS_CALLOUT_) && !defined(__APPLE__)
4228         TAILQ_INIT(&sctppcbinfo.callqueue);
4229 #endif
4230
4231 }
4232
4233 int
4234 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4235     int iphlen, int offset, int limit, struct sctphdr *sh,
4236     struct sockaddr *altsa)
4237 {
4238         /*
4239          * grub through the INIT pulling addresses and
4240          * loading them to the nets structure in the asoc.
4241          * The from address in the mbuf should also be loaded
4242          * (if it is not already). This routine can be called
4243          * with either INIT or INIT-ACK's as long as the
4244          * m points to the IP packet and the offset points
4245          * to the beginning of the parameters.
4246          */
4247         struct sctp_inpcb *inp, *l_inp;
4248         struct sctp_nets *net, *net_tmp;
4249         struct ip *iph;
4250         struct sctp_paramhdr *phdr, parm_buf;
4251         struct sctp_tcb *stcb_tmp;
4252         u_int16_t ptype, plen;
4253         struct sockaddr *sa;
4254         struct sockaddr_storage dest_store;
4255         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4256         struct sockaddr_in sin;
4257         struct sockaddr_in6 sin6;
4258
4259         /* First get the destination address setup too. */
4260         memset(&sin, 0, sizeof(sin));
4261         memset(&sin6, 0, sizeof(sin6));
4262
4263         sin.sin_family = AF_INET;
4264         sin.sin_len = sizeof(sin);
4265         sin.sin_port = stcb->rport;
4266
4267         sin6.sin6_family = AF_INET6;
4268         sin6.sin6_len = sizeof(struct sockaddr_in6);
4269         sin6.sin6_port = stcb->rport;
4270         if (altsa == NULL) {
4271                 iph = mtod(m, struct ip *);
4272                 if (iph->ip_v == IPVERSION) {
4273                         /* its IPv4 */
4274                         struct sockaddr_in *sin_2;
4275                         sin_2 = (struct sockaddr_in *)(local_sa);
4276                         memset(sin_2, 0, sizeof(sin));
4277                         sin_2->sin_family = AF_INET;
4278                         sin_2->sin_len = sizeof(sin);
4279                         sin_2->sin_port = sh->dest_port;
4280                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr ;
4281                         sin.sin_addr = iph->ip_src;
4282                         sa = (struct sockaddr *)&sin;
4283                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4284                         /* its IPv6 */
4285                         struct ip6_hdr *ip6;
4286                         struct sockaddr_in6 *sin6_2;
4287
4288                         ip6 = mtod(m, struct ip6_hdr *);
4289                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4290                         memset(sin6_2, 0, sizeof(sin6));
4291                         sin6_2->sin6_family = AF_INET6;
4292                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4293                         sin6_2->sin6_port = sh->dest_port;
4294                         sin6.sin6_addr = ip6->ip6_src;
4295                         sa = (struct sockaddr *)&sin6;
4296                 } else {
4297                         sa = NULL;
4298                 }
4299         } else {
4300                 /*
4301                  * For cookies we use the src address NOT from the packet
4302                  * but from the original INIT
4303                  */
4304                 sa = altsa;
4305         }
4306         /* Turn off ECN until we get through all params */
4307         stcb->asoc.ecn_allowed = 0;
4308
4309         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4310                 /* mark all addresses that we have currently on the list */
4311                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4312         }
4313         /* does the source address already exist? if so skip it */
4314         l_inp = inp = stcb->sctp_ep;
4315         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4316         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4317                 /* we must add the source address */
4318                 /* no scope set here since we have a tcb already. */
4319                 if ((sa->sa_family == AF_INET) &&
4320                     (stcb->asoc.ipv4_addr_legal)) {
4321                         if (sctp_add_remote_addr(stcb, sa, 0, 2)) {
4322                                 return (-1);
4323                         }
4324                 } else if ((sa->sa_family == AF_INET6) &&
4325                     (stcb->asoc.ipv6_addr_legal)) {
4326                         if (sctp_add_remote_addr(stcb, sa, 0, 3)) {
4327                                 return (-1);
4328                         }
4329                 }
4330         } else {
4331                 if (net_tmp != NULL && stcb_tmp == stcb) {
4332                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4333                 } else if (stcb_tmp != stcb) {
4334                         /* It belongs to another association? */
4335                         return (-1);
4336                 }
4337         }
4338         /* since a unlock occured we must check the
4339          * TCB's state and the pcb's gone flags.
4340          */
4341         if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4342                 /* the user freed the ep */
4343                 return (-1);
4344         }
4345         if (stcb->asoc.state == 0) {
4346                 /* the assoc was freed? */
4347                 return (-1);
4348         }
4349
4350         /* now we must go through each of the params. */
4351         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4352         while (phdr) {
4353                 ptype = ntohs(phdr->param_type);
4354                 plen = ntohs(phdr->param_length);
4355                 /*printf("ptype => %d, plen => %d\n", ptype, plen);*/
4356                 if (offset + plen > limit) {
4357                         break;
4358                 }
4359                 if (plen == 0) {
4360                         break;
4361                 }
4362                 if ((ptype == SCTP_IPV4_ADDRESS) &&
4363                     (stcb->asoc.ipv4_addr_legal)) {
4364                         struct sctp_ipv4addr_param *p4, p4_buf;
4365                         /* ok get the v4 address and check/add */
4366                         phdr = sctp_get_next_param(m, offset,
4367                             (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4368                         if (plen != sizeof(struct sctp_ipv4addr_param) ||
4369                             phdr == NULL) {
4370                                 return (-1);
4371                         }
4372                         p4 = (struct sctp_ipv4addr_param *)phdr;
4373                         sin.sin_addr.s_addr = p4->addr;
4374                         sa = (struct sockaddr *)&sin;
4375                         inp = stcb->sctp_ep;
4376                         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4377                             local_sa, stcb);
4378
4379                         if ((stcb_tmp== NULL && inp == stcb->sctp_ep) ||
4380                             inp == NULL) {
4381                                 /* we must add the source address */
4382                                 /* no scope set since we have a tcb already */
4383
4384                                 /* we must validate the state again here */
4385                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4386                                         /* the user freed the ep */
4387                                         return (-1);
4388                                 }
4389                                 if (stcb->asoc.state == 0) {
4390                                         /* the assoc was freed? */
4391                                         return (-1);
4392                                 }
4393                                 if (sctp_add_remote_addr(stcb, sa, 0, 4)) {
4394                                         return (-1);
4395                                 }
4396                         } else if (stcb_tmp == stcb) {
4397                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4398                                         /* the user freed the ep */
4399                                         return (-1);
4400                                 }
4401                                 if (stcb->asoc.state == 0) {
4402                                         /* the assoc was freed? */
4403                                         return (-1);
4404                                 }
4405                                 if (net != NULL) {
4406                                         /* clear flag */
4407                                         net->dest_state &=
4408                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4409                                 }
4410                         } else {
4411                                 /* strange, address is in another assoc?
4412                                  * straighten out locks.
4413                                  */
4414                                 SCTP_TCB_UNLOCK(stcb_tmp);
4415                                 SCTP_INP_RLOCK(inp);
4416                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4417                                         /* the user freed the ep */
4418                                         SCTP_INP_RUNLOCK(l_inp);
4419                                         return (-1);
4420                                 }
4421                                 if (stcb->asoc.state == 0) {
4422                                         /* the assoc was freed? */
4423                                         SCTP_INP_RUNLOCK(l_inp);
4424                                         return (-1);
4425                                 }
4426                                 SCTP_TCB_LOCK(stcb);
4427                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
4428                                 return (-1);
4429                         }
4430                 } else if ((ptype == SCTP_IPV6_ADDRESS) &&
4431                     (stcb->asoc.ipv6_addr_legal)) {
4432                         /* ok get the v6 address and check/add */
4433                         struct sctp_ipv6addr_param *p6, p6_buf;
4434                         phdr = sctp_get_next_param(m, offset,
4435                             (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4436                         if (plen != sizeof(struct sctp_ipv6addr_param) ||
4437                             phdr == NULL) {
4438                                 return (-1);
4439                         }
4440                         p6 = (struct sctp_ipv6addr_param *)phdr;
4441                         memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4442                             sizeof(p6->addr));
4443                         sa = (struct sockaddr *)&sin6;
4444                         inp = stcb->sctp_ep;
4445                         stcb_tmp= sctp_findassociation_ep_addr(&inp, sa, &net,
4446                             local_sa, stcb);
4447                         if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4448                             inp == NULL)) {
4449                                 /* we must validate the state again here */
4450                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4451                                         /* the user freed the ep */
4452                                         return (-1);
4453                                 }
4454                                 if (stcb->asoc.state == 0) {
4455                                         /* the assoc was freed? */
4456                                         return (-1);
4457                                 }
4458                                 /* we must add the address, no scope set */
4459                                 if (sctp_add_remote_addr(stcb, sa, 0, 5)) {
4460                                         return (-1);
4461                                 }
4462                         } else if (stcb_tmp == stcb) {
4463                                 /* we must validate the state again here */
4464                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4465                                         /* the user freed the ep */
4466                                         return (-1);
4467                                 }
4468                                 if (stcb->asoc.state == 0) {
4469                                         /* the assoc was freed? */
4470                                         return (-1);
4471                                 }
4472                                 if (net != NULL) {
4473                                         /* clear flag */
4474                                         net->dest_state &=
4475                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4476                                 }
4477                         } else {
4478                                 /* strange, address is in another assoc?
4479                                  * straighten out locks.
4480                                  */
4481                                 SCTP_TCB_UNLOCK(stcb_tmp);
4482                                 SCTP_INP_RLOCK(l_inp);
4483                                 /* we must validate the state again here */
4484                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4485                                         /* the user freed the ep */
4486                                         SCTP_INP_RUNLOCK(l_inp);
4487                                         return (-1);
4488                                 }
4489                                 if (stcb->asoc.state == 0) {
4490                                         /* the assoc was freed? */
4491                                         SCTP_INP_RUNLOCK(l_inp);
4492                                         return (-1);
4493                                 }
4494                                 SCTP_TCB_LOCK(stcb);
4495                                 SCTP_INP_RUNLOCK(l_inp);
4496                                 return (-1);
4497                         }
4498                 } else if (ptype == SCTP_ECN_CAPABLE) {
4499                         stcb->asoc.ecn_allowed = 1;
4500                 } else if (ptype == SCTP_ULP_ADAPTION) {
4501                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
4502                                 struct sctp_adaption_layer_indication ai, *aip;
4503
4504                                 phdr = sctp_get_next_param(m, offset,
4505                                                            (struct sctp_paramhdr *)&ai, sizeof(ai));
4506                                 aip = (struct sctp_adaption_layer_indication *)phdr;
4507                                 sctp_ulp_notify(SCTP_NOTIFY_ADAPTION_INDICATION,
4508                                                 stcb, ntohl(aip->indication), NULL);
4509                         }
4510                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4511                         struct sctp_asconf_addr_param lstore, *fee;
4512                         struct sctp_asconf_addrv4_param *fii;
4513                         int lptype;
4514                         struct sockaddr *lsa = NULL;
4515
4516                         stcb->asoc.peer_supports_asconf = 1;
4517                         stcb->asoc.peer_supports_asconf_setprim = 1;
4518                         if (plen > sizeof(lstore)) {
4519                                 return (-1);
4520                         }
4521                         phdr = sctp_get_next_param(m, offset,
4522                             (struct sctp_paramhdr *)&lstore, plen);
4523                         if (phdr == NULL) {
4524                                 return (-1);
4525                         }
4526
4527                         fee  = (struct sctp_asconf_addr_param *)phdr;
4528                         lptype = ntohs(fee->addrp.ph.param_type);
4529                         if (lptype == SCTP_IPV4_ADDRESS) {
4530                                 if (plen !=
4531                                     sizeof(struct sctp_asconf_addrv4_param)) {
4532                                         printf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4533                                            (int)sizeof(struct sctp_asconf_addrv4_param),
4534                                            plen);
4535                                 } else {
4536                                         fii = (struct sctp_asconf_addrv4_param *)fee;
4537                                         sin.sin_addr.s_addr = fii->addrp.addr;
4538                                         lsa = (struct sockaddr *)&sin;
4539                                 }
4540                         } else if (lptype == SCTP_IPV6_ADDRESS) {
4541                                 if (plen !=
4542                                     sizeof(struct sctp_asconf_addr_param)) {
4543                                         printf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4544                                            (int)sizeof(struct sctp_asconf_addr_param),
4545                                            plen);
4546                                 } else {
4547                                         memcpy(sin6.sin6_addr.s6_addr,
4548                                             fee->addrp.addr,
4549                                             sizeof(fee->addrp.addr));
4550                                         lsa = (struct sockaddr *)&sin6;
4551                                 }
4552                         }
4553                         if (lsa) {
4554                                 sctp_set_primary_addr(stcb, sa, NULL);
4555                         }
4556
4557                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4558                         /* Peer supports pr-sctp */
4559                         stcb->asoc.peer_supports_prsctp = 1;
4560                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4561                         /* A supported extension chunk */
4562                         struct sctp_supported_chunk_types_param *pr_supported;
4563                         uint8_t local_store[128];
4564                         int num_ent, i;
4565
4566                         phdr = sctp_get_next_param(m, offset,
4567                             (struct sctp_paramhdr *)&local_store, plen);
4568                         if (phdr == NULL) {
4569                                 return (-1);
4570                         }
4571                         stcb->asoc.peer_supports_asconf = 0;
4572                         stcb->asoc.peer_supports_asconf_setprim = 0;
4573                         stcb->asoc.peer_supports_prsctp = 0;
4574                         stcb->asoc.peer_supports_pktdrop = 0;
4575                         stcb->asoc.peer_supports_strreset = 0;
4576                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4577                         num_ent = plen - sizeof(struct sctp_paramhdr);
4578                         for (i=0; i<num_ent; i++) {
4579                                 switch (pr_supported->chunk_types[i]) {
4580                                 case SCTP_ASCONF:
4581                                         stcb->asoc.peer_supports_asconf = 1;
4582                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4583                                         break;
4584                                 case SCTP_ASCONF_ACK:
4585                                         stcb->asoc.peer_supports_asconf = 1;
4586                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4587                                         break;
4588                                 case SCTP_FORWARD_CUM_TSN:
4589                                         stcb->asoc.peer_supports_prsctp = 1;
4590                                         break;
4591                                 case SCTP_PACKET_DROPPED:
4592                                         stcb->asoc.peer_supports_pktdrop = 1;
4593                                         break;
4594                                 case SCTP_STREAM_RESET:
4595                                         stcb->asoc.peer_supports_strreset = 1;
4596                                         break;
4597                                 default:
4598                                         /* one I have not learned yet */
4599                                         break;
4600
4601                                 }
4602                         }
4603                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4604                         /* Peer supports ECN-nonce */
4605                         stcb->asoc.peer_supports_ecn_nonce = 1;
4606                         stcb->asoc.ecn_nonce_allowed = 1;
4607                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4608                            (ptype == SCTP_STATE_COOKIE) ||
4609                            (ptype == SCTP_UNRECOG_PARAM) ||
4610                            (ptype == SCTP_COOKIE_PRESERVE) ||
4611                            (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4612                            (ptype == SCTP_ADD_IP_ADDRESS) ||
4613                            (ptype == SCTP_DEL_IP_ADDRESS) ||
4614                            (ptype == SCTP_ERROR_CAUSE_IND) ||
4615                            (ptype == SCTP_SUCCESS_REPORT)) {
4616                         /* don't care */;
4617                 } else {
4618                         if ((ptype & 0x8000) == 0x0000) {
4619                                 /* must stop processing the rest of
4620                                  * the param's. Any report bits were
4621                                  * handled with the call to sctp_arethere_unrecognized_parameters()
4622                                  * when the INIT or INIT-ACK was first seen.
4623                                  */
4624                                 break;
4625                         }
4626                 }
4627                 offset += SCTP_SIZE32(plen);
4628                 if (offset >= limit) {
4629                         break;
4630                 }
4631                 phdr = sctp_get_next_param(m, offset, &parm_buf,
4632                     sizeof(parm_buf));
4633         }
4634         /* Now check to see if we need to purge any addresses */
4635         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
4636                 net_tmp = TAILQ_NEXT(net, sctp_next);
4637                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
4638                     SCTP_ADDR_NOT_IN_ASSOC) {
4639                         /* This address has been removed from the asoc */
4640                         /* remove and free it */
4641                         stcb->asoc.numnets--;
4642                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
4643                         sctp_free_remote_addr(net);
4644                         if (net == stcb->asoc.primary_destination) {
4645                                 stcb->asoc.primary_destination = NULL;
4646                                 sctp_select_primary_destination(stcb);
4647                         }
4648                 }
4649         }
4650         return (0);
4651 }
4652
4653 int
4654 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
4655     struct sctp_nets *net)
4656 {
4657         /* make sure the requested primary address exists in the assoc */
4658         if (net == NULL && sa)
4659                 net = sctp_findnet(stcb, sa);
4660
4661         if (net == NULL) {
4662                 /* didn't find the requested primary address! */
4663                 return (-1);
4664         } else {
4665                 /* set the primary address */
4666                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
4667                         /* Must be confirmed */
4668                         return (-1);
4669                 }
4670                 stcb->asoc.primary_destination = net;
4671                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
4672                 return (0);
4673         }
4674 }
4675
4676
4677 int
4678 sctp_is_vtag_good(struct sctp_inpcb *inp, u_int32_t tag, struct timeval *now)
4679 {
4680         /*
4681          * This function serves two purposes. It will see if a TAG can be
4682          * re-used and return 1 for yes it is ok and 0 for don't use that
4683          * tag.
4684          * A secondary function it will do is purge out old tags that can
4685          * be removed.
4686          */
4687         struct sctpasochead *head;
4688         struct sctpvtaghead *chain;
4689         struct sctp_tagblock *twait_block;
4690         struct sctp_tcb *stcb;
4691
4692         int i;
4693         SCTP_INP_INFO_WLOCK();
4694         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4695         /* First is the vtag in use ? */
4696
4697         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
4698             sctppcbinfo.hashasocmark)];
4699         if (head == NULL) {
4700                 SCTP_INP_INFO_WUNLOCK();
4701                 return (0);
4702         }
4703         LIST_FOREACH(stcb, head, sctp_asocs) {
4704                 if (stcb->asoc.my_vtag == tag) {
4705                         /* We should remove this if and
4706                          * return 0 always if we want vtags
4707                          * unique across all endpoints. For
4708                          * now within a endpoint is ok.
4709                          */
4710                         if (inp == stcb->sctp_ep) {
4711                                 /* bad tag, in use */
4712                                 SCTP_INP_INFO_WUNLOCK();
4713                                 return (0);
4714                         }
4715                 }
4716         }
4717         if (!LIST_EMPTY(chain)) {
4718                 /*
4719                  * Block(s) are present, lets see if we have this tag in
4720                  * the list
4721                  */
4722                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4723                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4724                                 if (twait_block->vtag_block[i].v_tag == 0) {
4725                                         /* not used */
4726                                         continue;
4727                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
4728                                     now->tv_sec) {
4729                                         /* Audit expires this guy */
4730                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4731                                         twait_block->vtag_block[i].v_tag = 0;
4732                                 } else if (twait_block->vtag_block[i].v_tag ==
4733                                     tag) {
4734                                         /* Bad tag, sorry :< */
4735                                         SCTP_INP_INFO_WUNLOCK();
4736                                         return (0);
4737                                 }
4738                         }
4739                 }
4740         }
4741         /* Not found, ok to use the tag */
4742         SCTP_INP_INFO_WUNLOCK();
4743         return (1);
4744 }
4745
4746
4747 /*
4748  * Delete the address from the endpoint local address list
4749  * Lookup using a sockaddr address (ie. not an ifaddr)
4750  */
4751 int
4752 sctp_del_local_addr_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa)
4753 {
4754         struct sctp_laddr *laddr;
4755         struct sockaddr *l_sa;
4756         int found = 0;
4757         /* Here is another function I cannot find a
4758          * caller for. As such we SHOULD delete it
4759          * if we have no users. If we find a user that
4760          * user MUST have the INP locked.
4761          *
4762          */
4763
4764         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4765                 /* You are already bound to all. You have it already */
4766                 return (EINVAL);
4767         }
4768
4769         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4770                 /* make sure the address exists */
4771                 if (laddr->ifa == NULL)
4772                         continue;
4773                 if (laddr->ifa->ifa_addr == NULL)
4774                         continue;
4775
4776                 l_sa = laddr->ifa->ifa_addr;
4777                 if (l_sa->sa_family == AF_INET6) {
4778                         /* IPv6 address */
4779                         struct sockaddr_in6 *sin1, *sin2;
4780                         sin1 = (struct sockaddr_in6 *)l_sa;
4781                         sin2 = (struct sockaddr_in6 *)sa;
4782                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4783                             sizeof(struct in6_addr)) == 0) {
4784                                 /* matched */
4785                                 found = 1;
4786                                 break;
4787                         }
4788                 } else if (l_sa->sa_family == AF_INET) {
4789                         /* IPv4 address */
4790                         struct sockaddr_in *sin1, *sin2;
4791                         sin1 = (struct sockaddr_in *)l_sa;
4792                         sin2 = (struct sockaddr_in *)sa;
4793                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4794                                 /* matched */
4795                                 found = 1;
4796                                 break;
4797                         }
4798                 } else {
4799                         /* invalid family */
4800                         return (-1);
4801                 }
4802         }
4803
4804         if (found && inp->laddr_count < 2) {
4805                 /* can't delete unless there are at LEAST 2 addresses */
4806                 return (-1);
4807         }
4808
4809         if (found && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
4810                 /*
4811                  * remove it from the ep list, this should NOT be
4812                  * done until its really gone from the interface list and
4813                  * we won't be receiving more of these. Probably right
4814                  * away. If we do allow a removal of an address from
4815                  * an association (sub-set bind) than this should NOT
4816                  * be called until the all ASCONF come back from this
4817                  * association.
4818                  */
4819                 sctp_remove_laddr(laddr);
4820                 return (0);
4821         } else {
4822                 return (-1);
4823         }
4824 }
4825
4826 static void
4827 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4828 {
4829         /*
4830          * We must hunt this association for MBUF's past the cumack
4831          * (i.e. out of order data that we can renege on).
4832          */
4833         struct sctp_association *asoc;
4834         struct sctp_tmit_chunk *chk, *nchk;
4835         u_int32_t cumulative_tsn_p1, tsn;
4836         int cnt, strmat, gap;
4837         /* We look for anything larger than the cum-ack + 1 */
4838
4839         asoc = &stcb->asoc;
4840         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
4841         cnt = 0;
4842         /* First look in the re-assembly queue */
4843         chk = TAILQ_FIRST(&asoc->reasmqueue);
4844         while (chk) {
4845                 /* Get the next one */
4846                 nchk = TAILQ_NEXT(chk, sctp_next);
4847                 if (compare_with_wrap(chk->rec.data.TSN_seq,
4848                     cumulative_tsn_p1, MAX_TSN)) {
4849                         /* Yep it is above cum-ack */
4850                         cnt++;
4851                         tsn = chk->rec.data.TSN_seq;
4852                         if (tsn >= asoc->mapping_array_base_tsn) {
4853                                 gap  = tsn - asoc->mapping_array_base_tsn;
4854                         } else {
4855                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
4856                                     tsn + 1;
4857                         }
4858                         asoc->size_on_reasm_queue -= chk->send_size;
4859                         asoc->cnt_on_reasm_queue--;
4860                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
4861                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4862                         if (chk->data) {
4863                                 sctp_m_freem(chk->data);
4864                                 chk->data = NULL;
4865                         }
4866                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4867                         sctppcbinfo.ipi_count_chunk--;
4868                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4869                                 panic("Chunk count is negative");
4870                         }
4871                         sctppcbinfo.ipi_gencnt_chunk++;
4872                 }
4873                 chk = nchk;
4874         }
4875         /* Ok that was fun, now we will drain all the inbound streams? */
4876         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
4877                 chk = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
4878                 while (chk) {
4879                         nchk = TAILQ_NEXT(chk, sctp_next);
4880                         if (compare_with_wrap(chk->rec.data.TSN_seq,
4881                             cumulative_tsn_p1, MAX_TSN)) {
4882                                 /* Yep it is above cum-ack */
4883                                 cnt++;
4884                                 tsn = chk->rec.data.TSN_seq;
4885                                 if (tsn >= asoc->mapping_array_base_tsn) {
4886                                         gap = tsn -
4887                                             asoc->mapping_array_base_tsn;
4888                                 } else {
4889                                         gap = (MAX_TSN -
4890                                             asoc->mapping_array_base_tsn) +
4891                                             tsn + 1;
4892                                 }
4893                                 asoc->size_on_all_streams -= chk->send_size;
4894                                 asoc->cnt_on_all_streams--;
4895
4896                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
4897                                     gap);
4898                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
4899                                     chk, sctp_next);
4900                                 if (chk->data) {
4901                                         sctp_m_freem(chk->data);
4902                                         chk->data = NULL;
4903                                 }
4904                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4905                                 sctppcbinfo.ipi_count_chunk--;
4906                                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4907                                         panic("Chunk count is negative");
4908                                 }
4909                                 sctppcbinfo.ipi_gencnt_chunk++;
4910                         }
4911                         chk = nchk;
4912                 }
4913         }
4914         /*
4915          * Question, should we go through the delivery queue?
4916          * The only reason things are on here is the app not reading OR a
4917          * p-d-api up. An attacker COULD send enough in to initiate the
4918          * PD-API and then send a bunch of stuff to other streams... these
4919          * would wind up on the delivery queue.. and then we would not get
4920          * to them. But in order to do this I then have to back-track and
4921          * un-deliver sequence numbers in streams.. el-yucko. I think for
4922          * now we will NOT look at the delivery queue and leave it to be
4923          * something to consider later. An alternative would be to abort
4924          * the P-D-API with a notification and then deliver the data....
4925          * Or another method might be to keep track of how many times the
4926          * situation occurs and if we see a possible attack underway just
4927          * abort the association.
4928          */
4929 #ifdef SCTP_DEBUG
4930         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
4931                 if (cnt) {
4932                         printf("Freed %d chunks from reneg harvest\n", cnt);
4933                 }
4934         }
4935 #endif /* SCTP_DEBUG */
4936
4937         /*
4938          * Another issue, in un-setting the TSN's in the mapping array we
4939          * DID NOT adjust the higest_tsn marker.  This will cause one of
4940          * two things to occur. It may cause us to do extra work in checking
4941          * for our mapping array movement. More importantly it may cause us
4942          * to SACK every datagram. This may not be a bad thing though since
4943          * we will recover once we get our cum-ack above and all this stuff
4944          * we dumped recovered.
4945          */
4946 }
4947
4948 void
4949 sctp_drain(void)
4950 {
4951         /*
4952          * We must walk the PCB lists for ALL associations here. The system
4953          * is LOW on MBUF's and needs help. This is where reneging will
4954          * occur. We really hope this does NOT happen!
4955          */
4956         struct sctp_inpcb *inp;
4957         struct sctp_tcb *stcb;
4958
4959         SCTP_INP_INFO_RLOCK();
4960         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
4961                 /* For each endpoint */
4962                 SCTP_INP_RLOCK(inp);
4963                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4964                         /* For each association */
4965                         SCTP_TCB_LOCK(stcb);
4966                         sctp_drain_mbufs(inp, stcb);
4967                         SCTP_TCB_UNLOCK(stcb);
4968                 }
4969                 SCTP_INP_RUNLOCK(inp);
4970         }
4971         SCTP_INP_INFO_RUNLOCK();
4972 }
4973
4974 int
4975 sctp_add_to_socket_q(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4976 {
4977         struct sctp_socket_q_list *sq;
4978
4979         /* write lock on INP assumed */
4980         if ((inp == NULL) || (stcb == NULL)) {
4981                 /* I am paranoid */
4982                 return (0);
4983         }
4984         sq = (struct sctp_socket_q_list *)SCTP_ZONE_GET(
4985             sctppcbinfo.ipi_zone_sockq);
4986         if (sq == NULL) {
4987                 /* out of sq structs */
4988                 return (0);
4989         }
4990         sctppcbinfo.ipi_count_sockq++;
4991         sctppcbinfo.ipi_gencnt_sockq++;
4992         if (stcb)
4993                 stcb->asoc.cnt_msg_on_sb++;
4994         sq->tcb = stcb;
4995         TAILQ_INSERT_TAIL(&inp->sctp_queue_list, sq, next_sq);
4996         return (1);
4997 }
4998
4999
5000 struct sctp_tcb *
5001 sctp_remove_from_socket_q(struct sctp_inpcb *inp)
5002 {
5003         struct sctp_tcb *stcb = NULL;
5004         struct sctp_socket_q_list *sq;
5005
5006         /* W-Lock on INP assumed held */
5007         sq = TAILQ_FIRST(&inp->sctp_queue_list);
5008         if (sq == NULL)
5009                 return (NULL);
5010
5011         stcb = sq->tcb;
5012         TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
5013         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
5014         sctppcbinfo.ipi_count_sockq--;
5015         sctppcbinfo.ipi_gencnt_sockq++;
5016         if (stcb) {
5017                 stcb->asoc.cnt_msg_on_sb--;
5018         }
5019         return (stcb);
5020 }
5021
5022 int
5023 sctp_initiate_iterator(asoc_func af, uint32_t pcb_state, uint32_t asoc_state,
5024                        void *argp, uint32_t argi, end_func ef,
5025                        struct sctp_inpcb *s_inp)
5026 {
5027         struct sctp_iterator *it=NULL;
5028
5029         if (af == NULL) {
5030                 return (-1);
5031         }
5032         MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), M_PCB,
5033                M_WAITOK);
5034         if (it == NULL) {
5035                 return (ENOMEM);
5036         }
5037         memset(it, 0, sizeof(*it));
5038         it->function_toapply = af;
5039         it->function_atend = ef;
5040         it->pointer = argp;
5041         it->val = argi;
5042         it->pcb_flags = pcb_state;
5043         it->asoc_state = asoc_state;
5044         if (s_inp) {
5045                 it->inp = s_inp;
5046                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5047         } else {
5048                 SCTP_INP_INFO_RLOCK();
5049                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5050                 SCTP_INP_INFO_RUNLOCK();
5051                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5052
5053         }
5054         /* Init the timer */
5055 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
5056         callout_init(&it->tmr.timer, 0);
5057 #else
5058         callout_init(&it->tmr.timer);
5059 #endif
5060         /* add to the list of all iterators */
5061         SCTP_INP_INFO_WLOCK();
5062         LIST_INSERT_HEAD(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5063         SCTP_INP_INFO_WUNLOCK();
5064         crit_enter();
5065         sctp_iterator_timer(it);
5066         crit_exit();
5067         return (0);
5068 }
5069
5070
5071 /*
5072  * Callout/Timer routines for OS that doesn't have them
5073  */
5074 #ifdef _SCTP_NEEDS_CALLOUT_
5075 #ifndef __APPLE__
5076 extern int ticks;
5077 #endif
5078
5079 void
5080 callout_init(struct callout *c)
5081 {
5082         bzero(c, sizeof(*c));
5083 }
5084
5085 void
5086 callout_reset(struct callout *c, int to_ticks, void (*ftn)(void *), void *arg)
5087 {
5088         crit_enter();
5089         if (c->c_flags & CALLOUT_PENDING)
5090                 callout_stop(c);
5091
5092         /*
5093          * We could spl down here and back up at the TAILQ_INSERT_TAIL,
5094          * but there's no point since doing this setup doesn't take much
5095          * time.
5096          */
5097         if (to_ticks <= 0)
5098                 to_ticks = 1;
5099
5100         c->c_arg = arg;
5101         c->c_flags = (CALLOUT_ACTIVE | CALLOUT_PENDING);
5102         c->c_func = ftn;
5103 #ifdef __APPLE__
5104         c->c_time = to_ticks;   /* just store the requested timeout */
5105         timeout(ftn, arg, to_ticks);
5106 #else
5107         c->c_time = ticks + to_ticks;
5108         TAILQ_INSERT_TAIL(&sctppcbinfo.callqueue, c, tqe);
5109 #endif
5110         crit_exit();
5111 }
5112
5113 int
5114 callout_stop(struct callout *c)
5115 {
5116         crit_enter();
5117         /*
5118          * Don't attempt to delete a callout that's not on the queue.
5119          */
5120         if (!(c->c_flags & CALLOUT_PENDING)) {
5121                 c->c_flags &= ~CALLOUT_ACTIVE;
5122                 crit_exit();
5123                 return (0);
5124         }
5125         c->c_flags &= ~(CALLOUT_ACTIVE | CALLOUT_PENDING| CALLOUT_FIRED);
5126 #ifdef __APPLE__
5127 /*      thread_call_cancel(c->c_call); */
5128         untimeout(c->c_func, c->c_arg);
5129 #else
5130         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5131         c->c_func = NULL;
5132 #endif
5133         crit_exit();
5134         return (1);
5135 }
5136
5137 #if !defined(__APPLE__)
5138 void
5139 sctp_fasttim(void)
5140 {
5141         struct callout *c, *n;
5142         struct calloutlist locallist;
5143         int inited = 0;
5144
5145         crit_enter();
5146         /* run through and subtract and mark all callouts */
5147         c = TAILQ_FIRST(&sctppcbinfo.callqueue);
5148         while (c) {
5149                 n = TAILQ_NEXT(c, tqe);
5150                 if (c->c_time <= ticks) {
5151                         c->c_flags |= CALLOUT_FIRED;
5152                         c->c_time = 0;
5153                         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5154                         if (inited == 0) {
5155                                 TAILQ_INIT(&locallist);
5156                                 inited = 1;
5157                         }
5158                         /* move off of main list */
5159                         TAILQ_INSERT_TAIL(&locallist, c, tqe);
5160                 }
5161                 c = n;
5162         }
5163         /* Now all the ones on the locallist must be called */
5164         if (inited) {
5165                 c = TAILQ_FIRST(&locallist);
5166                 while (c) {
5167                         /* remove it */
5168                         TAILQ_REMOVE(&locallist, c, tqe);
5169                         /* now validate that it did not get canceled */
5170                         if (c->c_flags & CALLOUT_FIRED) {
5171                                 c->c_flags &= ~CALLOUT_PENDING;
5172                                 crit_exit();
5173                                 (*c->c_func)(c->c_arg);
5174                                 crit_enter();
5175                         }
5176                         c = TAILQ_FIRST(&locallist);
5177                 }
5178         }
5179         crit_exit();
5180 }
5181 #endif
5182 #endif /* _SCTP_NEEDS_CALLOUT_ */