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 1.7 2005/07/15 17:23:47 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 <netkey/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()
 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()
 208 {
 209         SCTP_INP_INFO_RLOCK();
 210 }
 211
 212
 213 void sctp_validate_no_locks()
 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                 (void)in6_recoverscope(to6, &to6->sin6_addr, NULL);
1305 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1306                 (void)in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
1307 #else
1308                 (void)in6_embedscope(&to6->sin6_addr, to6);
1309 #endif
1310
1311                 (void)in6_recoverscope(from6, &from6->sin6_addr, NULL);
1312 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1313                 (void)in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
1314 #else
1315                 (void)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_pcbpolicy(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                 /* Be sure it is NON-BLOCKING IO for UDP */
1538                 /*so->so_state |= SS_NBIO;*/
1539         } else if (so->so_type == SOCK_STREAM) {
1540                 /* TCP style socket */
1541                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1542                     SCTP_PCB_FLAGS_UNBOUND);
1543                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1544                 /* Be sure we have blocking IO bu default */
1545                 so->so_state &= ~SS_NBIO;
1546         } else {
1547                 /*
1548                  * unsupported socket type (RAW, etc)- in case we missed
1549                  * it in protosw
1550                  */
1551                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1552                 SCTP_INP_INFO_WUNLOCK();
1553                 return (EOPNOTSUPP);
1554         }
1555         inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1556 #ifdef __NetBSD__
1557             HASH_LIST,
1558 #endif
1559             M_PCB,
1560 #if defined(__NetBSD__) || defined(__OpenBSD__)
1561             M_WAITOK,
1562 #endif
1563             &inp->sctp_hashmark);
1564         if (inp->sctp_tcbhash == NULL) {
1565                 printf("Out of SCTP-INPCB->hashinit - no resources\n");
1566                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1567                 SCTP_INP_INFO_WUNLOCK();
1568                 return (ENOBUFS);
1569         }
1570         /* LOCK init's */
1571         SCTP_INP_LOCK_INIT(inp);
1572         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1573         /* lock the new ep */
1574         SCTP_INP_WLOCK(inp);
1575
1576         /* add it to the info area */
1577         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1578         SCTP_INP_INFO_WUNLOCK();
1579
1580         LIST_INIT(&inp->sctp_addr_list);
1581         LIST_INIT(&inp->sctp_asoc_list);
1582         TAILQ_INIT(&inp->sctp_queue_list);
1583         /* Init the timer structure for signature change */
1584 #if defined (__FreeBSD__) && __FreeBSD_version >= 500000
1585         callout_init(&inp->sctp_ep.signature_change.timer, 0);
1586 #else
1587         callout_init(&inp->sctp_ep.signature_change.timer);
1588 #endif
1589         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1590
1591         /* now init the actual endpoint default data */
1592         m = &inp->sctp_ep;
1593
1594         /* setup the base timeout information */
1595         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1596         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1597         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1598         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
1599         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1600         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1601         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1602         /* all max/min max are in ms */
1603         m->sctp_maxrto = sctp_rto_max_default;
1604         m->sctp_minrto = sctp_rto_min_default;
1605         m->initial_rto = sctp_rto_initial_default;
1606         m->initial_init_rto_max = sctp_init_rto_max_default;
1607
1608         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1609
1610         m->max_init_times = sctp_init_rtx_max_default;
1611         m->max_send_times = sctp_assoc_rtx_max_default;
1612         m->def_net_failure = sctp_path_rtx_max_default;
1613         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1614         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1615         m->max_burst = sctp_max_burst_default;
1616         /* number of streams to pre-open on a association */
1617         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1618
1619         /* Add adaption cookie */
1620         m->adaption_layer_indicator = 0x504C5253;
1621
1622         /* seed random number generator */
1623         m->random_counter = 1;
1624         m->store_at = SCTP_SIGNATURE_SIZE;
1625 #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
1626         read_random_unlimited(m->random_numbers, sizeof(m->random_numbers));
1627 #elif defined(__APPLE__) || (__FreeBSD_version > 500000)
1628         read_random(m->random_numbers, sizeof(m->random_numbers));
1629 #elif defined(__OpenBSD__)
1630         get_random_bytes(m->random_numbers, sizeof(m->random_numbers));
1631 #elif defined(__NetBSD__) && NRND > 0
1632         rnd_extract_data(m->random_numbers, sizeof(m->random_numbers),
1633                          RND_EXTRACT_ANY);
1634 #else
1635         {
1636                 u_int32_t *ranm, *ranp;
1637                 ranp = (u_int32_t *)&m->random_numbers;
1638                 ranm = ranp + (SCTP_SIGNATURE_ALOC_SIZE/sizeof(u_int32_t));
1639                 if ((u_long)ranp % 4) {
1640                         /* not a even boundary? */
1641                         ranp = (u_int32_t *)SCTP_SIZE32((u_long)ranp);
1642                 }
1643                 while (ranp < ranm) {
1644                         *ranp = random();
1645                         ranp++;
1646                 }
1647         }
1648 #endif
1649         sctp_fill_random_store(m);
1650
1651         /* Minimum cookie size */
1652         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1653                 sizeof(struct sctp_state_cookie);
1654         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1655
1656         /* Setup the initial secret */
1657         SCTP_GETTIME_TIMEVAL(&time);
1658         m->time_of_secret_change = time.tv_sec;
1659
1660         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1661                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1662         }
1663         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1664
1665         /* How long is a cookie good for ? */
1666         m->def_cookie_life = sctp_valid_cookie_life_default;
1667         SCTP_INP_WUNLOCK(inp);
1668         return (error);
1669 }
1670
1671
1672 void
1673 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1674     struct sctp_tcb *stcb)
1675 {
1676         uint16_t lport, rport;
1677         struct sctppcbhead *head;
1678         struct sctp_laddr *laddr, *oladdr;
1679
1680         SCTP_TCB_UNLOCK(stcb);
1681         SCTP_INP_INFO_WLOCK();
1682         SCTP_INP_WLOCK(old_inp);
1683         SCTP_INP_WLOCK(new_inp);
1684         SCTP_TCB_LOCK(stcb);
1685
1686         new_inp->sctp_ep.time_of_secret_change =
1687             old_inp->sctp_ep.time_of_secret_change;
1688         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1689             sizeof(old_inp->sctp_ep.secret_key));
1690         new_inp->sctp_ep.current_secret_number =
1691             old_inp->sctp_ep.current_secret_number;
1692         new_inp->sctp_ep.last_secret_number =
1693             old_inp->sctp_ep.last_secret_number;
1694         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1695
1696         /* Copy the port across */
1697         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1698         rport = stcb->rport;
1699         /* Pull the tcb from the old association */
1700         LIST_REMOVE(stcb, sctp_tcbhash);
1701         LIST_REMOVE(stcb, sctp_tcblist);
1702
1703         /* Now insert the new_inp into the TCP connected hash */
1704         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1705             sctppcbinfo.hashtcpmark)];
1706
1707         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1708
1709         /* Now move the tcb into the endpoint list */
1710         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1711         /*
1712          * Question, do we even need to worry about the ep-hash since
1713          * we only have one connection? Probably not :> so lets
1714          * get rid of it and not suck up any kernel memory in that.
1715          */
1716         SCTP_INP_INFO_WUNLOCK();
1717         stcb->sctp_socket = new_inp->sctp_socket;
1718         stcb->sctp_ep = new_inp;
1719         if (new_inp->sctp_tcbhash != NULL) {
1720                 FREE(new_inp->sctp_tcbhash, M_PCB);
1721                 new_inp->sctp_tcbhash = NULL;
1722         }
1723         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1724                 /* Subset bound, so copy in the laddr list from the old_inp */
1725                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1726                         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
1727                             sctppcbinfo.ipi_zone_laddr);
1728                         if (laddr == NULL) {
1729                                 /*
1730                                  * Gak, what can we do? This assoc is really
1731                                  * HOSED. We probably should send an abort
1732                                  * here.
1733                                  */
1734 #ifdef SCTP_DEBUG
1735                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1736                                         printf("Association hosed in TCP model, out of laddr memory\n");
1737                                 }
1738 #endif /* SCTP_DEBUG */
1739                                 continue;
1740                         }
1741                         sctppcbinfo.ipi_count_laddr++;
1742                         sctppcbinfo.ipi_gencnt_laddr++;
1743                         bzero(laddr, sizeof(*laddr));
1744                         laddr->ifa = oladdr->ifa;
1745                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1746                             sctp_nxt_addr);
1747                         new_inp->laddr_count++;
1748                 }
1749         }
1750         SCTP_INP_WUNLOCK(new_inp);
1751         SCTP_INP_WUNLOCK(old_inp);
1752 }
1753
1754 static int
1755 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
1756 {
1757         struct sctppcbhead *head;
1758         struct sctp_inpcb *t_inp;
1759
1760         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1761             sctppcbinfo.hashmark)];
1762         LIST_FOREACH(t_inp, head, sctp_hash) {
1763                 if (t_inp->sctp_lport != lport) {
1764                         continue;
1765                 }
1766                 /* This one is in use. */
1767                 /* check the v6/v4 binding issue */
1768                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1769 #if defined(__FreeBSD__)
1770                     (((struct inpcb *)t_inp)->inp_flags & IN6P_IPV6_V6ONLY)
1771 #else
1772 #if defined(__OpenBSD__)
1773                     (0) /* For open bsd we do dual bind only */
1774 #else
1775                     (((struct in6pcb *)t_inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1776 #endif
1777 #endif
1778                         ) {
1779                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1780                                 /* collision in V6 space */
1781                                 return (1);
1782                         } else {
1783                                 /* inp is BOUND_V4 no conflict */
1784                                 continue;
1785                         }
1786                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1787                         /* t_inp is bound v4 and v6, conflict always */
1788                         return (1);
1789                 } else {
1790                         /* t_inp is bound only V4 */
1791                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1792 #if defined(__FreeBSD__)
1793                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
1794 #else
1795 #if defined(__OpenBSD__)
1796                             (0) /* For open bsd we do dual bind only */
1797 #else
1798                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1799 #endif
1800 #endif
1801                                 ) {
1802                                 /* no conflict */
1803                                 continue;
1804                         }
1805                         /* else fall through to conflict */
1806                 }
1807                 return (1);
1808         }
1809         return (0);
1810 }
1811
1812 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
1813 /*
1814  * Don't know why, but without this there is an unknown reference when
1815  * compiling NetBSD... hmm
1816  */
1817 extern void in6_sin6_2_sin (struct sockaddr_in *, struct sockaddr_in6 *sin6);
1818 #endif
1819
1820
1821 int
1822 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
1823 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1824 #else
1825 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct proc *p)
1826 #endif
1827 {
1828         /* bind a ep to a socket address */
1829         struct sctppcbhead *head;
1830         struct sctp_inpcb *inp, *inp_tmp;
1831         struct inpcb *ip_inp;
1832         int bindall;
1833         uint16_t lport;
1834         int error;
1835
1836         lport = 0;
1837         error = 0;
1838         bindall = 1;
1839         inp = (struct sctp_inpcb *)so->so_pcb;
1840         ip_inp = (struct inpcb *)so->so_pcb;
1841 #ifdef SCTP_DEBUG
1842         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1843                 if (addr) {
1844                         printf("Bind called port:%d\n",
1845                                ntohs(((struct sockaddr_in *)addr)->sin_port));
1846                         printf("Addr :");
1847                         sctp_print_address(addr);
1848                 }
1849         }
1850 #endif /* SCTP_DEBUG */
1851         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1852                 /* already did a bind, subsequent binds NOT allowed ! */
1853                 return (EINVAL);
1854         }
1855
1856         if (addr != NULL) {
1857                 if (addr->sa_family == AF_INET) {
1858                         struct sockaddr_in *sin;
1859
1860                         /* IPV6_V6ONLY socket? */
1861                         if (
1862 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1863                                 (ip_inp->inp_flags & IN6P_IPV6_V6ONLY)
1864 #else
1865 #if defined(__OpenBSD__)
1866                                 (0)     /* For openbsd we do dual bind only */
1867 #else
1868                                 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1869 #endif
1870 #endif
1871                                 ) {
1872                                 return (EINVAL);
1873                         }
1874
1875                         if (addr->sa_len != sizeof(*sin))
1876                                 return (EINVAL);
1877
1878                         sin = (struct sockaddr_in *)addr;
1879                         lport = sin->sin_port;
1880
1881                         if (sin->sin_addr.s_addr != INADDR_ANY) {
1882                                 bindall = 0;
1883                         }
1884                 } else if (addr->sa_family == AF_INET6) {
1885                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
1886                         struct sockaddr_in6 *sin6;
1887
1888                         sin6 = (struct sockaddr_in6 *)addr;
1889
1890                         if (addr->sa_len != sizeof(*sin6))
1891                                 return (EINVAL);
1892
1893                         lport = sin6->sin6_port;
1894                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1895                                 bindall = 0;
1896                                 /* KAME hack: embed scopeid */
1897 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1898                                 if (in6_embedscope(&sin6->sin6_addr, sin6,
1899                                     ip_inp, NULL) != 0)
1900                                         return (EINVAL);
1901 #elif defined(__FreeBSD__)
1902                                 error = scope6_check_id(sin6, ip6_use_defzone);
1903                                 if (error != 0)
1904                                         return (error);
1905 #else
1906                                 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
1907                                         return (EINVAL);
1908                                 }
1909 #endif
1910                         }
1911 #ifndef SCOPEDROUTING
1912                         /* this must be cleared for ifa_ifwithaddr() */
1913                         sin6->sin6_scope_id = 0;
1914 #endif /* SCOPEDROUTING */
1915                 } else {
1916                         return (EAFNOSUPPORT);
1917                 }
1918         }
1919         SCTP_INP_INFO_WLOCK();
1920         SCTP_INP_WLOCK(inp);
1921         /* increase our count due to the unlock we do */
1922         SCTP_INP_INCR_REF(inp);
1923         if (lport) {
1924                 /*
1925                  * Did the caller specify a port? if so we must see if a
1926                  * ep already has this one bound.
1927                  */
1928                 /* got to be root to get at low ports */
1929                 if (ntohs(lport) < IPPORT_RESERVED) {
1930                         if (p && (error =
1931 #ifdef __FreeBSD__
1932 #if __FreeBSD_version >= 500000
1933                             suser_cred(p->td_ucred, 0)
1934 #else
1935                             suser(p)
1936 #endif
1937 #elif defined(__NetBSD__) || defined(__APPLE__)
1938                             suser(p->p_ucred, &p->p_acflag)
1939 #elif defined(__DragonFly__)
1940                             suser(p)
1941 #else
1942                             suser(p, 0)
1943 #endif
1944                             )) {
1945                                 SCTP_INP_DECR_REF(inp);
1946                                 SCTP_INP_WUNLOCK(inp);
1947                                 SCTP_INP_INFO_WUNLOCK();
1948                                 return (error);
1949                         }
1950                 }
1951                 if (p == NULL) {
1952                         SCTP_INP_DECR_REF(inp);
1953                         SCTP_INP_WUNLOCK(inp);
1954                         SCTP_INP_INFO_WUNLOCK();
1955                         return (error);
1956                 }
1957                 SCTP_INP_WUNLOCK(inp);
1958                 inp_tmp = sctp_pcb_findep(addr, 0, 1);
1959                 if (inp_tmp != NULL) {
1960                         /* lock guy returned and lower count
1961                          * note that we are not bound so inp_tmp
1962                          * should NEVER be inp. And it is this
1963                          * inp (inp_tmp) that gets the reference
1964                          * bump, so we must lower it.
1965                          */
1966                         SCTP_INP_WLOCK(inp_tmp);
1967                         SCTP_INP_DECR_REF(inp_tmp);
1968                         SCTP_INP_WUNLOCK(inp_tmp);
1969
1970                         /* unlock info */
1971                         SCTP_INP_INFO_WUNLOCK();
1972                         return (EADDRNOTAVAIL);
1973                 }
1974                 SCTP_INP_WLOCK(inp);
1975                 if (bindall) {
1976                         /* verify that no lport is not used by a singleton */
1977                         if (sctp_isport_inuse(inp, lport)) {
1978                                 /* Sorry someone already has this one bound */
1979                                 SCTP_INP_DECR_REF(inp);
1980                                 SCTP_INP_WUNLOCK(inp);
1981                                 SCTP_INP_INFO_WUNLOCK();
1982                                 return (EADDRNOTAVAIL);
1983                         }
1984                 }
1985         } else {
1986                 /*
1987                  * get any port but lets make sure no one has any address
1988                  * with this port bound
1989                  */
1990
1991                 /*
1992                  * setup the inp to the top (I could use the union but this
1993                  * is just as easy
1994                  */
1995                 uint32_t port_guess;
1996                 uint16_t port_attempt;
1997                 int not_done=1;
1998
1999                 while (not_done) {
2000                         port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
2001                         port_attempt = (port_guess &  0x0000ffff);
2002                         if (port_attempt == 0) {
2003                                 goto next_half;
2004                         }
2005                         if (port_attempt < IPPORT_RESERVED) {
2006                                 port_attempt += IPPORT_RESERVED;
2007                         }
2008
2009                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2010                                 /* got a port we can use */
2011                                 not_done = 0;
2012                                 continue;
2013                         }
2014                         /* try upper half */
2015                 next_half:
2016                         port_attempt = ((port_guess >> 16) &  0x0000ffff);
2017                         if (port_attempt == 0) {
2018                                 goto last_try;
2019                         }
2020                         if (port_attempt < IPPORT_RESERVED) {
2021                                 port_attempt += IPPORT_RESERVED;
2022                         }
2023                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2024                                 /* got a port we can use */
2025                                 not_done = 0;
2026                                 continue;
2027                         }
2028                         /* try two half's added together */
2029                 last_try:
2030                         port_attempt = (((port_guess >> 16) &  0x0000ffff) + (port_guess & 0x0000ffff));
2031                         if (port_attempt == 0) {
2032                                 /* get a new random number */
2033                                 continue;
2034                         }
2035                         if (port_attempt < IPPORT_RESERVED) {
2036                                 port_attempt += IPPORT_RESERVED;
2037                         }
2038                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2039                                 /* got a port we can use */
2040                                 not_done = 0;
2041                                 continue;
2042                         }
2043                 }
2044                 /* we don't get out of the loop until we have a port */
2045                 lport = htons(port_attempt);
2046         }
2047         SCTP_INP_DECR_REF(inp);
2048         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2049                 /* this really should not happen. The guy
2050                  * did a non-blocking bind and then did a close
2051                  * at the same time.
2052                  */
2053                 SCTP_INP_WUNLOCK(inp);
2054                 SCTP_INP_INFO_WUNLOCK();
2055                 return (EINVAL);
2056         }
2057         /* ok we look clear to give out this port, so lets setup the binding */
2058         if (bindall) {
2059                 /* binding to all addresses, so just set in the proper flags */
2060                 inp->sctp_flags |= (SCTP_PCB_FLAGS_BOUNDALL |
2061                     SCTP_PCB_FLAGS_DO_ASCONF);
2062                 /* set the automatic addr changes from kernel flag */
2063                 if (sctp_auto_asconf == 0) {
2064                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2065                 } else {
2066                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2067                 }
2068         } else {
2069                 /*
2070                  * bind specific, make sure flags is off and add a new address
2071                  * structure to the sctp_addr_list inside the ep structure.
2072                  *
2073                  * We will need to allocate one and insert it at the head.
2074                  * The socketopt call can just insert new addresses in there
2075                  * as well. It will also have to do the embed scope kame hack
2076                  * too (before adding).
2077                  */
2078                 struct ifaddr *ifa;
2079                 struct sockaddr_storage store_sa;
2080
2081                 memset(&store_sa, 0, sizeof(store_sa));
2082                 if (addr->sa_family == AF_INET) {
2083                         struct sockaddr_in *sin;
2084
2085                         sin = (struct sockaddr_in *)&store_sa;
2086                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2087                         sin->sin_port = 0;
2088                 } else if (addr->sa_family == AF_INET6) {
2089                         struct sockaddr_in6 *sin6;
2090
2091                         sin6 = (struct sockaddr_in6 *)&store_sa;
2092                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2093                         sin6->sin6_port = 0;
2094                 }
2095                 /*
2096                  * first find the interface with the bound address
2097                  * need to zero out the port to find the address! yuck!
2098                  * can't do this earlier since need port for sctp_pcb_findep()
2099                  */
2100                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
2101                 if (ifa == NULL) {
2102                         /* Can't find an interface with that address */
2103                         SCTP_INP_WUNLOCK(inp);
2104                         SCTP_INP_INFO_WUNLOCK();
2105                         return (EADDRNOTAVAIL);
2106                 }
2107                 if (addr->sa_family == AF_INET6) {
2108                         struct in6_ifaddr *ifa6;
2109                         ifa6 = (struct in6_ifaddr *)ifa;
2110                         /*
2111                          * allow binding of deprecated addresses as per
2112                          * RFC 2462 and ipng discussion
2113                          */
2114                         if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2115                             IN6_IFF_ANYCAST |
2116                             IN6_IFF_NOTREADY)) {
2117                                 /* Can't bind a non-existent addr. */
2118                                 SCTP_INP_WUNLOCK(inp);
2119                                 SCTP_INP_INFO_WUNLOCK();
2120                                 return (EINVAL);
2121                         }
2122                 }
2123                 /* we're not bound all */
2124                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2125 #if 0 /* use sysctl now */
2126                 /* don't allow automatic addr changes from kernel */
2127                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2128 #endif
2129                 /* set the automatic addr changes from kernel flag */
2130                 if (sctp_auto_asconf == 0) {
2131                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2132                 } else {
2133                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2134                 }
2135                 /* allow bindx() to send ASCONF's for binding changes */
2136                 inp->sctp_flags |= SCTP_PCB_FLAGS_DO_ASCONF;
2137                 /* add this address to the endpoint list */
2138                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
2139                 if (error != 0) {
2140                         SCTP_INP_WUNLOCK(inp);
2141                         SCTP_INP_INFO_WUNLOCK();
2142                         return (error);
2143                 }
2144                 inp->laddr_count++;
2145         }
2146         /* find the bucket */
2147         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2148             sctppcbinfo.hashmark)];
2149         /* put it in the bucket */
2150         LIST_INSERT_HEAD(head, inp, sctp_hash);
2151 #ifdef SCTP_DEBUG
2152         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2153                 printf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
2154         }
2155 #endif
2156         /* set in the port */
2157         inp->sctp_lport = lport;
2158
2159         /* turn off just the unbound flag */
2160         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2161         SCTP_INP_WUNLOCK(inp);
2162         SCTP_INP_INFO_WUNLOCK();
2163         return (0);
2164 }
2165
2166
2167 static void
2168 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2169 {
2170         struct sctp_iterator *it;
2171         /* We enter with the only the ITERATOR_LOCK in place and
2172          * A write lock on the inp_info stuff.
2173          */
2174
2175         /* Go through all iterators, we must do this since
2176          * it is possible that some iterator does NOT have
2177          * the lock, but is waiting for it. And the one that
2178          * had the lock has either moved in the last iteration
2179          * or we just cleared it above. We need to find all
2180          * of those guys. The list of iterators should never
2181          * be very big though.
2182          */
2183         LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2184                 if (it == inp->inp_starting_point_for_iterator)
2185                         /* skip this guy, he's special */
2186                         continue;
2187                 if (it->inp == inp) {
2188                         /* This is tricky and we DON'T lock the iterator.
2189                          * Reason is he's running but waiting for me since
2190                          * inp->inp_starting_point_for_iterator has the lock
2191                          * on me (the guy above we skipped). This tells us
2192                          * its is not running but waiting for inp->inp_starting_point_for_iterator
2193                          * to be released by the guy that does have our INP in a lock.
2194                          */
2195                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2196                                 it->inp = NULL;
2197                                 it->stcb = NULL;
2198                         } else {
2199                                 /* set him up to do the next guy not me */
2200                                 it->inp = inp_next;
2201                                 it->stcb = NULL;
2202                         }
2203                 }
2204         }
2205         it = inp->inp_starting_point_for_iterator;
2206         if (it) {
2207                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2208                         it->inp = NULL;
2209                 } else {
2210                         it->inp = inp_next;
2211                 }
2212                 it->stcb = NULL;
2213         }
2214 }
2215
2216 /* release sctp_inpcb unbind the port */
2217 void
2218 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate)
2219 {
2220         /*
2221          * Here we free a endpoint. We must find it (if it is in the Hash
2222          * table) and remove it from there. Then we must also find it in
2223          * the overall list and remove it from there. After all removals are
2224          * complete then any timer has to be stopped. Then start the actual
2225          * freeing.
2226          * a) Any local lists.
2227          * b) Any associations.
2228          * c) The hash of all associations.
2229          * d) finally the ep itself.
2230          */
2231         struct sctp_pcb *m;
2232         struct sctp_inpcb *inp_save;
2233         struct sctp_tcb *asoc, *nasoc;
2234         struct sctp_laddr *laddr, *nladdr;
2235         struct inpcb *ip_pcb;
2236         struct socket *so;
2237         struct sctp_socket_q_list *sq;
2238 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2239         struct rtentry *rt;
2240 #endif
2241         int cnt;
2242
2243         crit_enter();
2244         SCTP_ASOC_CREATE_LOCK(inp);
2245         SCTP_INP_WLOCK(inp);
2246
2247         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2248                 /* been here before */
2249                 crit_exit();
2250                 printf("Endpoint was all gone (dup free)?\n");
2251                 SCTP_INP_WUNLOCK(inp);
2252                 SCTP_ASOC_CREATE_UNLOCK(inp);
2253                 return;
2254         }
2255         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2256
2257         if (inp->control) {
2258                 sctp_m_freem(inp->control);
2259                 inp->control = NULL;
2260         }
2261         if (inp->pkt) {
2262                 sctp_m_freem(inp->pkt);
2263                 inp->pkt = NULL;
2264         }
2265         so  = inp->sctp_socket;
2266         m = &inp->sctp_ep;
2267         ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2268                                    * pointer here but I will
2269                                    * be nice :> (i.e. ip_pcb = ep;)
2270                                    */
2271
2272         if (immediate == 0) {
2273                 int cnt_in_sd;
2274                 cnt_in_sd = 0;
2275                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2276                      asoc = nasoc) {
2277                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2278                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2279                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2280                                 /* Just abandon things in the front states */
2281                                 SCTP_TCB_LOCK(asoc);
2282                                 SCTP_INP_WUNLOCK(inp);
2283                                 sctp_free_assoc(inp, asoc);
2284                                 SCTP_INP_WLOCK(inp);
2285                                 continue;
2286                         } else {
2287                                 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2288                         }
2289                         if ((asoc->asoc.size_on_delivery_queue  > 0) ||
2290                             (asoc->asoc.size_on_reasm_queue > 0) ||
2291                             (asoc->asoc.size_on_all_streams > 0) ||
2292                             (so && (so->so_rcv.sb_cc > 0))
2293                                 ) {
2294                                 /* Left with Data unread */
2295                                 struct mbuf *op_err;
2296                                 MGET(op_err, MB_DONTWAIT, MT_DATA);
2297                                 if (op_err) {
2298                                         /* Fill in the user initiated abort */
2299                                         struct sctp_paramhdr *ph;
2300                                         op_err->m_len =
2301                                             sizeof(struct sctp_paramhdr);
2302                                         ph = mtod(op_err,
2303                                             struct sctp_paramhdr *);
2304                                         ph->param_type = htons(
2305                                             SCTP_CAUSE_USER_INITIATED_ABT);
2306                                         ph->param_length = htons(op_err->m_len);
2307                                 }
2308                                 SCTP_TCB_LOCK(asoc);
2309                                 sctp_send_abort_tcb(asoc, op_err);
2310
2311                                 SCTP_INP_WUNLOCK(inp);
2312                                 sctp_free_assoc(inp, asoc);
2313                                 SCTP_INP_WLOCK(inp);
2314                                 continue;
2315                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2316                             TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2317                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2318                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2319                                         /* there is nothing queued to send, so I send shutdown */
2320                                         SCTP_TCB_LOCK(asoc);
2321                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2322                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2323                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2324                                                          asoc->asoc.primary_destination);
2325                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2326                                                          asoc->asoc.primary_destination);
2327                                         sctp_chunk_output(inp, asoc, 1);
2328                                         SCTP_TCB_UNLOCK(asoc);
2329                                 }
2330                         } else {
2331                                 /* mark into shutdown pending */
2332                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2333                         }
2334                         cnt_in_sd++;
2335                 }
2336                 /* now is there some left in our SHUTDOWN state? */
2337                 if (cnt_in_sd) {
2338                         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2339                         crit_exit();
2340                         SCTP_INP_WUNLOCK(inp);
2341                         SCTP_ASOC_CREATE_UNLOCK(inp);
2342                         return;
2343                 }
2344         }
2345 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2346         if (inp->refcount) {
2347                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2348                 SCTP_INP_WUNLOCK(inp);
2349                 SCTP_ASOC_CREATE_UNLOCK(inp);
2350                 return;
2351         }
2352 #endif
2353         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2354 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2355         rt = ip_pcb->inp_route.ro_rt;
2356 #endif
2357
2358         callout_stop(&inp->sctp_ep.signature_change.timer);
2359
2360         if (so) {
2361         /* First take care of socket level things */
2362 #ifdef IPSEC
2363 #ifdef __OpenBSD__
2364         /* XXX IPsec cleanup here */
2365                 crit_enter();
2366                 if (ip_pcb->inp_tdb_in)
2367                     TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2368                                  ip_pcb, inp_tdb_in_next);
2369                 if (ip_pcb->inp_tdb_out)
2370                     TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2371                                  inp_tdb_out_next);
2372                 if (ip_pcb->inp_ipsec_localid)
2373                     ipsp_reffree(ip_pcb->inp_ipsec_localid);
2374                 if (ip_pcb->inp_ipsec_remoteid)
2375                     ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2376                 if (ip_pcb->inp_ipsec_localcred)
2377                     ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2378                 if (ip_pcb->inp_ipsec_remotecred)
2379                     ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2380                 if (ip_pcb->inp_ipsec_localauth)
2381                     ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2382                 if (ip_pcb->inp_ipsec_remoteauth)
2383                     ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2384                 crit_exit();
2385 #else
2386                 ipsec4_delete_pcbpolicy(ip_pcb);
2387 #endif
2388 #endif /*IPSEC*/
2389 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2390                 ACCEPT_LOCK();
2391                 SOCK_LOCK(so);
2392 #endif
2393                 so->so_pcb = 0;
2394 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2395                 sotryfree(so);
2396 #else
2397                 sofree(so);
2398 #endif
2399         }
2400
2401         if (ip_pcb->inp_options) {
2402                 (void)m_free(ip_pcb->inp_options);
2403                 ip_pcb->inp_options = 0;
2404         }
2405 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2406         if (rt) {
2407                 RTFREE(rt);
2408                 ip_pcb->inp_route.ro_rt = 0;
2409         }
2410 #endif
2411         if (ip_pcb->inp_moptions) {
2412                 ip_freemoptions(ip_pcb->inp_moptions);
2413                 ip_pcb->inp_moptions = 0;
2414         }
2415 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2416         inp->inp_vflag = 0;
2417 #else
2418         ip_pcb->inp_vflag = 0;
2419 #endif
2420
2421         /* Now the sctp_pcb things */
2422
2423         /*
2424          * free each asoc if it is not already closed/free. we can't use
2425          * the macro here since le_next will get freed as part of the
2426          * sctp_free_assoc() call.
2427          */
2428         cnt = 0;
2429         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2430              asoc = nasoc) {
2431                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2432                 SCTP_TCB_LOCK(asoc);
2433                 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2434                         struct mbuf *op_err;
2435                         MGET(op_err, MB_DONTWAIT, MT_DATA);
2436                         if (op_err) {
2437                                 /* Fill in the user initiated abort */
2438                                 struct sctp_paramhdr *ph;
2439                                 op_err->m_len = sizeof(struct sctp_paramhdr);
2440                                 ph = mtod(op_err, struct sctp_paramhdr *);
2441                                 ph->param_type = htons(
2442                                     SCTP_CAUSE_USER_INITIATED_ABT);
2443                                 ph->param_length = htons(op_err->m_len);
2444                         }
2445                         sctp_send_abort_tcb(asoc, op_err);
2446                 }
2447                 cnt++;
2448                 /*
2449                  * sctp_free_assoc() will call sctp_inpcb_free(),
2450                  * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2451                  * So, we clear it before sctp_free_assoc() making sure
2452                  * no double sctp_inpcb_free().
2453                  */
2454                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2455                 SCTP_INP_WUNLOCK(inp);
2456                 sctp_free_assoc(inp, asoc);
2457                 SCTP_INP_WLOCK(inp);
2458         }
2459         while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2460                 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2461                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2462                 sctppcbinfo.ipi_count_sockq--;
2463                 sctppcbinfo.ipi_gencnt_sockq++;
2464         }
2465         inp->sctp_socket = 0;
2466         /* Now first we remove ourselves from the overall list of all EP's */
2467
2468         /* Unlock inp first, need correct order */
2469         SCTP_INP_WUNLOCK(inp);
2470         /* now iterator lock */
2471         SCTP_ITERATOR_LOCK();
2472         /* now info lock */
2473         SCTP_INP_INFO_WLOCK();
2474         /* now reget the inp lock */
2475         SCTP_INP_WLOCK(inp);
2476
2477         inp_save = LIST_NEXT(inp, sctp_list);
2478         LIST_REMOVE(inp, sctp_list);
2479         /*
2480          * Now the question comes as to if this EP was ever bound at all.
2481          * If it was, then we must pull it out of the EP hash list.
2482          */
2483         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2484             SCTP_PCB_FLAGS_UNBOUND) {
2485                 /*
2486                  * ok, this guy has been bound. It's port is somewhere
2487                  * in the sctppcbinfo hash table. Remove it!
2488                  */
2489                 LIST_REMOVE(inp, sctp_hash);
2490         }
2491         /* fix any iterators only after out of the list */
2492         sctp_iterator_inp_being_freed(inp, inp_save);
2493         SCTP_ITERATOR_UNLOCK();
2494         /*
2495          * if we have an address list the following will free the list of
2496          * ifaddr's that are set into this ep. Again macro limitations here,
2497          * since the LIST_FOREACH could be a bad idea.
2498          */
2499         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2500              laddr = nladdr) {
2501                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2502                 LIST_REMOVE(laddr, sctp_nxt_addr);
2503                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2504                 sctppcbinfo.ipi_gencnt_laddr++;
2505                 sctppcbinfo.ipi_count_laddr--;
2506         }
2507         /* Now lets see about freeing the EP hash table. */
2508         if (inp->sctp_tcbhash != NULL) {
2509                 FREE(inp->sctp_tcbhash, M_PCB);
2510                 inp->sctp_tcbhash = 0;
2511         }
2512         SCTP_INP_WUNLOCK(inp);
2513         SCTP_ASOC_CREATE_UNLOCK(inp);
2514         SCTP_INP_LOCK_DESTROY(inp);
2515         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2516
2517         /* Now we must put the ep memory back into the zone pool */
2518         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2519         sctppcbinfo.ipi_count_ep--;
2520
2521         SCTP_INP_INFO_WUNLOCK();
2522         crit_exit();
2523 }
2524
2525
2526 struct sctp_nets *
2527 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2528 {
2529         struct sctp_nets *net;
2530         struct sockaddr_in *sin;
2531         struct sockaddr_in6 *sin6;
2532         /* use the peer's/remote port for lookup if unspecified */
2533         sin = (struct sockaddr_in *)addr;
2534         sin6 = (struct sockaddr_in6 *)addr;
2535 #if 0 /* why do we need to check the port for a nets list on an assoc? */
2536         if (stcb->rport != sin->sin_port) {
2537                 /* we cheat and just a sin for this test */
2538                 return (NULL);
2539         }
2540 #endif
2541         /* locate the address */
2542         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2543                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2544                         return (net);
2545         }
2546         return (NULL);
2547 }
2548
2549
2550 /*
2551  * add's a remote endpoint address, done with the INIT/INIT-ACK
2552  * as well as when a ASCONF arrives that adds it. It will also
2553  * initialize all the cwnd stats of stuff.
2554  */
2555 int
2556 sctp_is_address_on_local_host(struct sockaddr *addr)
2557 {
2558         struct ifnet *ifn;
2559         struct ifaddr *ifa;
2560         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2561                 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
2562                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2563                                 /* same family */
2564                                 if (addr->sa_family == AF_INET) {
2565                                         struct sockaddr_in *sin, *sin_c;
2566                                         sin = (struct sockaddr_in *)addr;
2567                                         sin_c = (struct sockaddr_in *)
2568                                             ifa->ifa_addr;
2569                                         if (sin->sin_addr.s_addr ==
2570                                             sin_c->sin_addr.s_addr) {
2571                                                 /* we are on the same machine */
2572                                                 return (1);
2573                                         }
2574                                 } else if (addr->sa_family == AF_INET6) {
2575                                         struct sockaddr_in6 *sin6, *sin_c6;
2576                                         sin6 = (struct sockaddr_in6 *)addr;
2577                                         sin_c6 = (struct sockaddr_in6 *)
2578                                             ifa->ifa_addr;
2579                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2580                                             &sin_c6->sin6_addr)) {
2581                                                 /* we are on the same machine */
2582                                                 return (1);
2583                                         }
2584                                 }
2585                         }
2586                 }
2587         }
2588         return (0);
2589 }
2590
2591 int
2592 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2593     int set_scope, int from)
2594 {
2595         /*
2596          * The following is redundant to the same lines in the
2597          * sctp_aloc_assoc() but is needed since other's call the add
2598          * address function
2599          */
2600         struct sctp_nets *net, *netfirst;
2601         int addr_inscope;
2602
2603 #ifdef SCTP_DEBUG
2604         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2605                 printf("Adding an address (from:%d) to the peer: ", from);
2606                 sctp_print_address(newaddr);
2607         }
2608 #endif
2609         netfirst = sctp_findnet(stcb, newaddr);
2610         if (netfirst) {
2611                 /*
2612                  * Lie and return ok, we don't want to make the association
2613                  * go away for this behavior. It will happen in the TCP model
2614                  * in a connected socket. It does not reach the hash table
2615                  * until after the association is built so it can't be found.
2616                  * Mark as reachable, since the initial creation will have
2617                  * been cleared and the NOT_IN_ASSOC flag will have been
2618                  * added... and we don't want to end up removing it back out.
2619                  */
2620                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2621                         netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2622                             SCTP_ADDR_UNCONFIRMED);
2623                 } else {
2624                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2625                 }
2626
2627                 return (0);
2628         }
2629         addr_inscope = 1;
2630         if (newaddr->sa_family == AF_INET) {
2631                 struct sockaddr_in *sin;
2632                 sin = (struct sockaddr_in *)newaddr;
2633                 if (sin->sin_addr.s_addr == 0) {
2634                         /* Invalid address */
2635                         return (-1);
2636                 }
2637                 /* zero out the bzero area */
2638                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2639
2640                 /* assure len is set */
2641                 sin->sin_len = sizeof(struct sockaddr_in);
2642                 if (set_scope) {
2643 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2644                         stcb->ipv4_local_scope = 1;
2645 #else
2646                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2647                                 stcb->asoc.ipv4_local_scope = 1;
2648                         }
2649 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2650
2651                         if (sctp_is_address_on_local_host(newaddr)) {
2652                                 stcb->asoc.loopback_scope = 1;
2653                                 stcb->asoc.ipv4_local_scope = 1;
2654                                 stcb->asoc.local_scope = 1;
2655                                 stcb->asoc.site_scope = 1;
2656                         }
2657                 } else {
2658                         if (from == 8) {
2659                                 /* From connectx */
2660                                 if (sctp_is_address_on_local_host(newaddr)) {
2661                                         stcb->asoc.loopback_scope = 1;
2662                                         stcb->asoc.ipv4_local_scope = 1;
2663                                         stcb->asoc.local_scope = 1;
2664                                         stcb->asoc.site_scope = 1;
2665                                 }
2666                         }
2667                         /* Validate the address is in scope */
2668                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2669                             (stcb->asoc.ipv4_local_scope == 0)) {
2670                                 addr_inscope = 0;
2671                         }
2672                 }
2673         } else if (newaddr->sa_family == AF_INET6) {
2674                 struct sockaddr_in6 *sin6;
2675                 sin6 = (struct sockaddr_in6 *)newaddr;
2676                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2677                         /* Invalid address */
2678                         return (-1);
2679                 }
2680                 /* assure len is set */
2681                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2682                 if (set_scope) {
2683                         if (sctp_is_address_on_local_host(newaddr)) {
2684                                 stcb->asoc.loopback_scope = 1;
2685                                 stcb->asoc.local_scope = 1;
2686                                 stcb->asoc.ipv4_local_scope = 1;
2687                                 stcb->asoc.site_scope = 1;
2688                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2689                                 /*
2690                                  * If the new destination is a LINK_LOCAL
2691                                  * we must have common site scope. Don't set
2692                                  * the local scope since we may not share all
2693                                  * links, only loopback can do this.
2694                                  * Links on the local network would also
2695                                  * be on our private network for v4 too.
2696                                  */
2697                                 stcb->asoc.ipv4_local_scope = 1;
2698                                 stcb->asoc.site_scope = 1;
2699                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2700                                 /*
2701                                  * If the new destination is SITE_LOCAL
2702                                  * then we must have site scope in common.
2703                                  */
2704                                 stcb->asoc.site_scope = 1;
2705                         }
2706                 } else {
2707                         if (from == 8) {
2708                                 /* From connectx */
2709                                 if (sctp_is_address_on_local_host(newaddr)) {
2710                                         stcb->asoc.loopback_scope = 1;
2711                                         stcb->asoc.ipv4_local_scope = 1;
2712                                         stcb->asoc.local_scope = 1;
2713                                         stcb->asoc.site_scope = 1;
2714                                 }
2715                         }
2716                         /* Validate the address is in scope */
2717                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2718                             (stcb->asoc.loopback_scope == 0)) {
2719                                 addr_inscope = 0;
2720                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2721                                    (stcb->asoc.local_scope == 0)) {
2722                                 addr_inscope = 0;
2723                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2724                                    (stcb->asoc.site_scope == 0)) {
2725                                 addr_inscope = 0;
2726                         }
2727                 }
2728         } else {
2729                 /* not supported family type */
2730                 return (-1);
2731         }
2732         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2733         if (net == NULL) {
2734                 return (-1);
2735         }
2736         sctppcbinfo.ipi_count_raddr++;
2737         sctppcbinfo.ipi_gencnt_raddr++;
2738         bzero(net, sizeof(*net));
2739         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2740         if (newaddr->sa_family == AF_INET) {
2741                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2742         } else if (newaddr->sa_family == AF_INET6) {
2743                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2744         }
2745         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2746         net->failure_threshold = stcb->asoc.def_net_failure;
2747         if (addr_inscope == 0) {
2748 #ifdef SCTP_DEBUG
2749                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2750                         printf("Adding an address which is OUT OF SCOPE\n");
2751                 }
2752 #endif /* SCTP_DEBUG */
2753                 net->dest_state = (SCTP_ADDR_REACHABLE |
2754                     SCTP_ADDR_OUT_OF_SCOPE);
2755         } else {
2756                 if (from == 8)
2757                         /* 8 is passed by connect_x */
2758                         net->dest_state = SCTP_ADDR_REACHABLE;
2759                 else
2760                         net->dest_state = SCTP_ADDR_REACHABLE |
2761                             SCTP_ADDR_UNCONFIRMED;
2762         }
2763         net->RTO = stcb->asoc.initial_rto;
2764         stcb->asoc.numnets++;
2765         net->ref_count = 1;
2766
2767         /* Init the timer structure */
2768 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2769         callout_init(&net->rxt_timer.timer, 0);
2770         callout_init(&net->pmtu_timer.timer, 0);
2771 #else
2772         callout_init(&net->rxt_timer.timer);
2773         callout_init(&net->pmtu_timer.timer);
2774 #endif
2775
2776         /* Now generate a route for this guy */
2777         /* KAME hack: embed scopeid */
2778         if (newaddr->sa_family == AF_INET6) {
2779                 struct sockaddr_in6 *sin6;
2780                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2781 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2782                 (void)in6_embedscope(&sin6->sin6_addr, sin6,
2783                     &stcb->sctp_ep->ip_inp.inp, NULL);
2784 #else
2785                 (void)in6_embedscope(&sin6->sin6_addr, sin6);
2786 #endif
2787 #ifndef SCOPEDROUTING
2788                 sin6->sin6_scope_id = 0;
2789 #endif
2790         }
2791 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2792         rtalloc_ign((struct route *)&net->ro, 0UL);
2793 #else
2794         rtalloc((struct route *)&net->ro);
2795 #endif
2796         if (newaddr->sa_family == AF_INET6) {
2797                 struct sockaddr_in6 *sin6;
2798                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2799                 (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2800         }
2801         if ((net->ro.ro_rt) &&
2802             (net->ro.ro_rt->rt_ifp)) {
2803                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2804                 if (from == 1) {
2805                         stcb->asoc.smallest_mtu = net->mtu;
2806                 }
2807                 /* start things off to match mtu of interface please. */
2808                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2809         } else {
2810                 net->mtu = stcb->asoc.smallest_mtu;
2811         }
2812         if (stcb->asoc.smallest_mtu > net->mtu) {
2813                 stcb->asoc.smallest_mtu = net->mtu;
2814         }
2815         /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2816          * We then limit this to 4 MTU's of sending.
2817          */
2818         net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2819
2820         /* we always get at LEAST 2 MTU's */
2821         if (net->cwnd < (2 * net->mtu)) {
2822                 net->cwnd = 2 * net->mtu;
2823         }
2824
2825         net->ssthresh = stcb->asoc.peers_rwnd;
2826
2827         net->src_addr_selected = 0;
2828         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2829         if (net->ro.ro_rt == NULL) {
2830                 /* Since we have no route put it at the back */
2831                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2832         } else if (netfirst == NULL) {
2833                 /* We are the first one in the pool. */
2834                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2835         } else if (netfirst->ro.ro_rt == NULL) {
2836                 /*
2837                  * First one has NO route. Place this one ahead of the
2838                  * first one.
2839                  */
2840                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2841         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2842                 /*
2843                  * This one has a different interface than the one at the
2844                  * top of the list. Place it ahead.
2845                  */
2846                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2847         } else {
2848                 /*
2849                  * Ok we have the same interface as the first one. Move
2850                  * forward until we find either
2851                  *   a) one with a NULL route... insert ahead of that
2852                  *   b) one with a different ifp.. insert after that.
2853                  *   c) end of the list.. insert at the tail.
2854                  */
2855                 struct sctp_nets *netlook;
2856                 do {
2857                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2858                         if (netlook == NULL) {
2859                                 /* End of the list */
2860                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2861                                     sctp_next);
2862                                 break;
2863                         } else if (netlook->ro.ro_rt == NULL) {
2864                                 /* next one has NO route */
2865                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2866                                 break;
2867                         } else if (netlook->ro.ro_rt->rt_ifp !=
2868                                    net->ro.ro_rt->rt_ifp) {
2869                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2870                                     net, sctp_next);
2871                                 break;
2872                         }
2873                         /* Shift forward */
2874                         netfirst = netlook;
2875                 } while (netlook != NULL);
2876         }
2877         /* got to have a primary set */
2878         if (stcb->asoc.primary_destination == 0) {
2879                 stcb->asoc.primary_destination = net;
2880         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2881                    (net->ro.ro_rt)) {
2882                 /* No route to current primary adopt new primary */
2883                 stcb->asoc.primary_destination = net;
2884         }
2885         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2886             net);
2887
2888         return (0);
2889 }
2890
2891
2892 /*
2893  * allocate an association and add it to the endpoint. The caller must
2894  * be careful to add all additional addresses once they are know right
2895  * away or else the assoc will be may experience a blackout scenario.
2896  */
2897 struct sctp_tcb *
2898 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2899     int for_a_init, int *error,  uint32_t override_tag)
2900 {
2901         struct sctp_tcb *stcb;
2902         struct sctp_association *asoc;
2903         struct sctpasochead *head;
2904         uint16_t rport;
2905         int err;
2906
2907         /*
2908          * Assumption made here:
2909          *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2910          *  to make sure the address does not exist already.
2911          */
2912         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2913                 /* Hit max assoc, sorry no more */
2914                 *error = ENOBUFS;
2915                 return (NULL);
2916         }
2917         SCTP_INP_RLOCK(inp);
2918         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2919                 /*
2920                  * If its in the TCP pool, its NOT allowed to create an
2921                  * association. The parent listener needs to call
2922                  * sctp_aloc_assoc.. or the one-2-many socket. If a
2923                  * peeled off, or connected one does this.. its an error.
2924                  */
2925                 SCTP_INP_RUNLOCK(inp);
2926                 *error = EINVAL;
2927                 return (NULL);
2928         }
2929
2930 #ifdef SCTP_DEBUG
2931         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2932                 printf("Allocate an association for peer:");
2933                 if (firstaddr)
2934                         sctp_print_address(firstaddr);
2935                 else
2936                         printf("None\n");
2937                 printf("Port:%d\n",
2938                        ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2939         }
2940 #endif /* SCTP_DEBUG */
2941         if (firstaddr->sa_family == AF_INET) {
2942                 struct sockaddr_in *sin;
2943                 sin = (struct sockaddr_in *)firstaddr;
2944                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2945                         /* Invalid address */
2946 #ifdef SCTP_DEBUG
2947                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2948                                 printf("peer address invalid\n");
2949                         }
2950 #endif
2951                         SCTP_INP_RUNLOCK(inp);
2952                         *error = EINVAL;
2953                         return (NULL);
2954                 }
2955                 rport = sin->sin_port;
2956         } else if (firstaddr->sa_family == AF_INET6) {
2957                 struct sockaddr_in6 *sin6;
2958                 sin6 = (struct sockaddr_in6 *)firstaddr;
2959                 if ((sin6->sin6_port == 0) ||
2960                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2961                         /* Invalid address */
2962 #ifdef SCTP_DEBUG
2963                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2964                                 printf("peer address invalid\n");
2965                         }
2966 #endif
2967                         SCTP_INP_RUNLOCK(inp);
2968                         *error = EINVAL;
2969                         return (NULL);
2970                 }
2971                 rport = sin6->sin6_port;
2972         } else {
2973                 /* not supported family type */
2974 #ifdef SCTP_DEBUG
2975                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2976                         printf("BAD family %d\n", firstaddr->sa_family);
2977                 }
2978 #endif
2979                 SCTP_INP_RUNLOCK(inp);
2980                 *error = EINVAL;
2981                 return (NULL);
2982         }
2983         SCTP_INP_RUNLOCK(inp);
2984         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2985                 /*
2986                  * If you have not performed a bind, then we need to do
2987                  * the ephemerial bind for you.
2988                  */
2989 #ifdef SCTP_DEBUG
2990                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2991                         printf("Doing implicit BIND\n");
2992                 }
2993 #endif
2994
2995                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2996                     (struct sockaddr *)NULL,
2997 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2998                                            (struct thread *)NULL
2999 #else
3000                                            (struct proc *)NULL
3001 #endif
3002                              ))){
3003                         /* bind error, probably perm */
3004 #ifdef SCTP_DEBUG
3005                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3006                                 printf("BIND FAILS ret:%d\n", err);
3007                         }
3008 #endif
3009
3010                         *error = err;
3011                         return (NULL);
3012                 }
3013         }
3014         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3015         if (stcb == NULL) {
3016                 /* out of memory? */
3017 #ifdef SCTP_DEBUG
3018                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3019                         printf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3020                 }
3021 #endif
3022                 *error = ENOMEM;
3023                 return (NULL);
3024         }
3025         sctppcbinfo.ipi_count_asoc++;
3026         sctppcbinfo.ipi_gencnt_asoc++;
3027
3028         bzero(stcb, sizeof(*stcb));
3029         asoc = &stcb->asoc;
3030         SCTP_TCB_LOCK_INIT(stcb);
3031         /* setup back pointer's */
3032         stcb->sctp_ep = inp;
3033         stcb->sctp_socket = inp->sctp_socket;
3034         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3035                 /* failed */
3036                 SCTP_TCB_LOCK_DESTROY (stcb);
3037                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3038                 sctppcbinfo.ipi_count_asoc--;
3039 #ifdef SCTP_DEBUG
3040                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3041                         printf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3042                 }
3043 #endif
3044                 *error = err;
3045                 return (NULL);
3046         }
3047         /* and the port */
3048         stcb->rport = rport;
3049         SCTP_INP_INFO_WLOCK();
3050         SCTP_INP_WLOCK(inp);
3051         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3052                 /* inpcb freed while alloc going on */
3053                 SCTP_TCB_LOCK_DESTROY (stcb);
3054                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3055                 SCTP_INP_WUNLOCK(inp);
3056                 SCTP_INP_INFO_WUNLOCK();
3057                 sctppcbinfo.ipi_count_asoc--;
3058 #ifdef SCTP_DEBUG
3059                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3060                         printf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3061                 }
3062 #endif
3063                 *error = EINVAL;
3064                 return (NULL);
3065         }
3066         SCTP_TCB_LOCK(stcb);
3067
3068         /* now that my_vtag is set, add it to the  hash */
3069         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3070              sctppcbinfo.hashasocmark)];
3071         /* put it in the bucket in the vtag hash of assoc's for the system */
3072         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3073         SCTP_INP_INFO_WUNLOCK();
3074
3075
3076         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3077                 /* failure.. memory error? */
3078                 if (asoc->strmout)
3079                         FREE(asoc->strmout, M_PCB);
3080                 if (asoc->mapping_array)
3081                         FREE(asoc->mapping_array, M_PCB);
3082
3083                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3084                 sctppcbinfo.ipi_count_asoc--;
3085 #ifdef SCTP_DEBUG
3086                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3087                         printf("aloc_assoc: couldn't add remote addr!\n");
3088                 }
3089 #endif
3090                 SCTP_TCB_LOCK_DESTROY (stcb);
3091                 *error = ENOBUFS;
3092                 return (NULL);
3093         }
3094         /* Init all the timers */
3095 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3096         callout_init(&asoc->hb_timer.timer, 0);
3097         callout_init(&asoc->dack_timer.timer, 0);
3098         callout_init(&asoc->asconf_timer.timer, 0);
3099         callout_init(&asoc->shut_guard_timer.timer, 0);
3100         callout_init(&asoc->autoclose_timer.timer, 0);
3101         callout_init(&asoc->delayed_event_timer.timer, 0);
3102 #else
3103         callout_init(&asoc->hb_timer.timer);
3104         callout_init(&asoc->dack_timer.timer);
3105         callout_init(&asoc->asconf_timer.timer);
3106         callout_init(&asoc->shut_guard_timer.timer);
3107         callout_init(&asoc->autoclose_timer.timer);
3108         callout_init(&asoc->delayed_event_timer.timer);
3109 #endif
3110         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3111         /* now file the port under the hash as well */
3112         if (inp->sctp_tcbhash != NULL) {
3113                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3114                    inp->sctp_hashmark)];
3115                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3116         }
3117         SCTP_INP_WUNLOCK(inp);
3118 #ifdef SCTP_DEBUG
3119         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3120                 printf("Association %p now allocated\n", stcb);
3121         }
3122 #endif
3123         return (stcb);
3124 }
3125
3126 void
3127 sctp_free_remote_addr(struct sctp_nets *net)
3128 {
3129         if (net == NULL)
3130                 return;
3131         net->ref_count--;
3132         if (net->ref_count <= 0) {
3133                 /* stop timer if running */
3134                 callout_stop(&net->rxt_timer.timer);
3135                 callout_stop(&net->pmtu_timer.timer);
3136                 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3137                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3138                 sctppcbinfo.ipi_count_raddr--;
3139         }
3140 }
3141
3142 /*
3143  * remove a remote endpoint address from an association, it
3144  * will fail if the address does not exist.
3145  */
3146 int
3147 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3148 {
3149         /*
3150          * Here we need to remove a remote address. This is quite simple, we
3151          * first find it in the list of address for the association
3152          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3153          * that item.
3154          * Note we do not allow it to be removed if there are no other
3155          * addresses.
3156          */
3157         struct sctp_association *asoc;
3158         struct sctp_nets *net, *net_tmp;
3159         asoc = &stcb->asoc;
3160         if (asoc->numnets < 2) {
3161                 /* Must have at LEAST two remote addresses */
3162                 return (-1);
3163         }
3164         /* locate the address */
3165         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3166                 net_tmp = TAILQ_NEXT(net, sctp_next);
3167                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3168                         continue;
3169                 }
3170                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3171                     remaddr)) {
3172                         /* we found the guy */
3173                         asoc->numnets--;
3174                         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3175                         sctp_free_remote_addr(net);
3176                         if (net == asoc->primary_destination) {
3177                                 /* Reset primary */
3178                                 struct sctp_nets *lnet;
3179                                 lnet = TAILQ_FIRST(&asoc->nets);
3180                                 /* Try to find a confirmed primary */
3181                                 asoc->primary_destination =
3182                                     sctp_find_alternate_net(stcb, lnet);
3183                         }
3184                         if (net == asoc->last_data_chunk_from) {
3185                                 /* Reset primary */
3186                                 asoc->last_data_chunk_from =
3187                                     TAILQ_FIRST(&asoc->nets);
3188                         }
3189                         if (net == asoc->last_control_chunk_from) {
3190                                 /* Reset primary */
3191                                 asoc->last_control_chunk_from =
3192                                     TAILQ_FIRST(&asoc->nets);
3193                         }
3194                         if (net == asoc->asconf_last_sent_to) {
3195                                 /* Reset primary */
3196                                 asoc->asconf_last_sent_to =
3197                                     TAILQ_FIRST(&asoc->nets);
3198                         }
3199                         return (0);
3200                 }
3201         }
3202         /* not found. */
3203         return (-2);
3204 }
3205
3206
3207 static void
3208 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3209 {
3210         struct sctpvtaghead *chain;
3211         struct sctp_tagblock *twait_block;
3212         struct timeval now;
3213         int set, i;
3214         SCTP_GETTIME_TIMEVAL(&now);
3215         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3216         set = 0;
3217         if (!LIST_EMPTY(chain)) {
3218                 /* Block(s) present, lets find space, and expire on the fly */
3219                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3220                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3221                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3222                                     !set) {
3223                                         twait_block->vtag_block[0].tv_sec_at_expire =
3224                                             now.tv_sec + SCTP_TIME_WAIT;
3225                                         twait_block->vtag_block[0].v_tag = tag;
3226                                         set = 1;
3227                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3228                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3229                                     now.tv_sec)) {
3230                                         /* Audit expires this guy */
3231                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3232                                         twait_block->vtag_block[i].v_tag = 0;
3233                                         if (set == 0) {
3234                                                 /* Reuse it for my new tag */
3235                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3236                                                 twait_block->vtag_block[0].v_tag = tag;
3237                                                 set = 1;
3238                                         }
3239                                 }
3240                         }
3241                         if (set) {
3242                                 /*
3243                                  * We only do up to the block where we can
3244                                  * place our tag for audits
3245                                  */
3246                                 break;
3247                         }
3248                 }
3249         }
3250         /* Need to add a new block to chain */
3251         if (!set) {
3252                 MALLOC(twait_block, struct sctp_tagblock *,
3253                        sizeof(struct sctp_tagblock), M_PCB, M_NOWAIT);
3254                 if (twait_block == NULL) {
3255                         return;
3256                 }
3257                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3258                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3259                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3260                     SCTP_TIME_WAIT;
3261                 twait_block->vtag_block[0].v_tag = tag;
3262         }
3263 }
3264
3265
3266 static void
3267 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3268 {
3269         struct sctp_iterator *it;
3270
3271
3272
3273         /* Unlock the tcb lock we do this so
3274          * we avoid a dead lock scenario where
3275          * the iterator is waiting on the TCB lock
3276          * and the TCB lock is waiting on the iterator
3277          * lock.
3278          */
3279         SCTP_ITERATOR_LOCK();
3280         SCTP_INP_INFO_WLOCK();
3281         SCTP_INP_WLOCK(inp);
3282         SCTP_TCB_LOCK(stcb);
3283
3284         it = stcb->asoc.stcb_starting_point_for_iterator;
3285         if (it == NULL) {
3286                 return;
3287         }
3288         if (it->inp != stcb->sctp_ep) {
3289                 /* hm, focused on the wrong one? */
3290                 return;
3291         }
3292         if (it->stcb != stcb) {
3293                 return;
3294         }
3295         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3296         if (it->stcb == NULL) {
3297                 /* done with all asoc's in this assoc */
3298                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3299                         it->inp = NULL;
3300                 } else {
3301
3302                         it->inp = LIST_NEXT(inp, sctp_list);
3303                 }
3304         }
3305 }
3306
3307 /*
3308  * Free the association after un-hashing the remote port.
3309  */
3310 void
3311 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3312 {
3313         struct sctp_association *asoc;
3314         struct sctp_nets *net, *prev;
3315         struct sctp_laddr *laddr;
3316         struct sctp_tmit_chunk *chk;
3317         struct sctp_asconf_addr *aparam;
3318         struct sctp_socket_q_list *sq;
3319
3320         /* first, lets purge the entry from the hash table. */
3321         crit_enter();
3322         if (stcb->asoc.state == 0) {
3323                 printf("Freeing already free association:%p - huh??\n",
3324                     stcb);
3325                 crit_exit();
3326                 return;
3327         }
3328         asoc = &stcb->asoc;
3329         asoc->state = 0;
3330         /* now clean up any other timers */
3331         callout_stop(&asoc->hb_timer.timer);
3332         callout_stop(&asoc->dack_timer.timer);
3333         callout_stop(&asoc->asconf_timer.timer);
3334         callout_stop(&asoc->shut_guard_timer.timer);
3335         callout_stop(&asoc->autoclose_timer.timer);
3336         callout_stop(&asoc->delayed_event_timer.timer);
3337         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3338                 callout_stop(&net->rxt_timer.timer);
3339                 callout_stop(&net->pmtu_timer.timer);
3340         }
3341
3342         /* Iterator asoc being freed we send an
3343          * unlocked TCB. It returns with INP_INFO
3344          * and INP write locked and the TCB locked
3345          * too and of course the iterator lock
3346          * in place as well..
3347          */
3348         SCTP_TCB_UNLOCK(stcb);
3349         sctp_iterator_asoc_being_freed(inp, stcb);
3350
3351         /* Null all of my entry's on the socket q */
3352         TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3353                 if (sq->tcb == stcb) {
3354                         sq->tcb = NULL;
3355                 }
3356         }
3357
3358         if (inp->sctp_tcb_at_block == (void *)stcb) {
3359                 inp->error_on_block = ECONNRESET;
3360         }
3361
3362         if (inp->sctp_tcbhash) {
3363                 LIST_REMOVE(stcb, sctp_tcbhash);
3364         }
3365         /* Now lets remove it from the list of ALL associations in the EP */
3366         LIST_REMOVE(stcb, sctp_tcblist);
3367         SCTP_INP_WUNLOCK(inp);
3368         SCTP_ITERATOR_UNLOCK();
3369
3370
3371         /* pull from vtag hash */
3372         LIST_REMOVE(stcb, sctp_asocs);
3373
3374         /*
3375          * Now before we can free the assoc, we must  remove all of the
3376          * networks and any other allocated space.. i.e. add removes here
3377          * before the SCTP_ZONE_FREE() of the tasoc entry.
3378          */
3379
3380         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3381         SCTP_INP_INFO_WUNLOCK();
3382         prev = NULL;
3383         while (!TAILQ_EMPTY(&asoc->nets)) {
3384                 net = TAILQ_FIRST(&asoc->nets);
3385                 /* pull from list */
3386                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3387                         break;
3388                 }
3389                 prev = net;
3390                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3391                 /* free it */
3392                 net->ref_count = 0;
3393                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3394                 sctppcbinfo.ipi_count_raddr--;
3395         }
3396         /*
3397          * The chunk lists and such SHOULD be empty but we check them
3398          * just in case.
3399          */
3400         /* anything on the wheel needs to be removed */
3401         while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3402                 struct sctp_stream_out *outs;
3403                 outs = TAILQ_FIRST(&asoc->out_wheel);
3404                 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3405                 /* now clean up any chunks here */
3406                 chk = TAILQ_FIRST(&outs->outqueue);
3407                 while (chk) {
3408                         TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3409                         if (chk->data) {
3410                                 sctp_m_freem(chk->data);
3411                                 chk->data = NULL;
3412                         }
3413                         chk->whoTo = NULL;
3414                         chk->asoc = NULL;
3415                         /* Free the chunk */
3416                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3417                         sctppcbinfo.ipi_count_chunk--;
3418                         sctppcbinfo.ipi_gencnt_chunk++;
3419                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3420                                 panic("Chunk count is negative");
3421                         }
3422                         chk = TAILQ_FIRST(&outs->outqueue);
3423                 }
3424                 outs = TAILQ_FIRST(&asoc->out_wheel);
3425         }
3426
3427         if (asoc->pending_reply) {
3428                 FREE(asoc->pending_reply, M_PCB);
3429                 asoc->pending_reply = NULL;
3430         }
3431         chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3432         while (chk) {
3433                 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3434                 if (chk->data) {
3435                         sctp_m_freem(chk->data);
3436                         chk->data = NULL;
3437                 }
3438                 chk->whoTo = NULL;
3439                 chk->asoc = NULL;
3440                 /* Free the chunk */
3441                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3442                 sctppcbinfo.ipi_count_chunk--;
3443                 sctppcbinfo.ipi_gencnt_chunk++;
3444                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3445                         panic("Chunk count is negative");
3446                 }
3447                 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3448         }
3449         /* pending send queue SHOULD be empty */
3450         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3451                 chk = TAILQ_FIRST(&asoc->send_queue);
3452                 while (chk) {
3453                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3454                         if (chk->data) {
3455                                 sctp_m_freem(chk->data);
3456                                 chk->data = NULL;
3457                         }
3458                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3459                         sctppcbinfo.ipi_count_chunk--;
3460                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3461                                 panic("Chunk count is negative");
3462                         }
3463                         sctppcbinfo.ipi_gencnt_chunk++;
3464                         chk = TAILQ_FIRST(&asoc->send_queue);
3465                 }
3466         }
3467         /* sent queue SHOULD be empty */
3468         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3469                 chk = TAILQ_FIRST(&asoc->sent_queue);
3470                 while (chk) {
3471                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3472                         if (chk->data) {
3473                                 sctp_m_freem(chk->data);
3474                                 chk->data = NULL;
3475                         }
3476                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3477                         sctppcbinfo.ipi_count_chunk--;
3478                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3479                                 panic("Chunk count is negative");
3480                         }
3481                         sctppcbinfo.ipi_gencnt_chunk++;
3482                         chk = TAILQ_FIRST(&asoc->sent_queue);
3483                 }
3484         }
3485         /* control queue MAY not be empty */
3486         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3487                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3488                 while (chk) {
3489                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3490                         if (chk->data) {
3491                                 sctp_m_freem(chk->data);
3492                                 chk->data = NULL;
3493                         }
3494                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3495                         sctppcbinfo.ipi_count_chunk--;
3496                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3497                                 panic("Chunk count is negative");
3498                         }
3499                         sctppcbinfo.ipi_gencnt_chunk++;
3500                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3501                 }
3502         }
3503         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3504                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3505                 while (chk) {
3506                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3507                         if (chk->data) {
3508                                 sctp_m_freem(chk->data);
3509                                 chk->data = NULL;
3510                         }
3511                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3512                         sctppcbinfo.ipi_count_chunk--;
3513                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3514                                 panic("Chunk count is negative");
3515                         }
3516                         sctppcbinfo.ipi_gencnt_chunk++;
3517                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3518                 }
3519         }
3520         if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3521                 chk = TAILQ_FIRST(&asoc->delivery_queue);
3522                 while (chk) {
3523                         TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3524                         if (chk->data) {
3525                                 sctp_m_freem(chk->data);
3526                                 chk->data = NULL;
3527                         }
3528                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3529                         sctppcbinfo.ipi_count_chunk--;
3530                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3531                                 panic("Chunk count is negative");
3532                         }
3533                         sctppcbinfo.ipi_gencnt_chunk++;
3534                         chk = TAILQ_FIRST(&asoc->delivery_queue);
3535                 }
3536         }
3537         if (asoc->mapping_array) {
3538                 FREE(asoc->mapping_array, M_PCB);
3539                 asoc->mapping_array = NULL;
3540         }
3541
3542         /* the stream outs */
3543         if (asoc->strmout) {
3544                 FREE(asoc->strmout, M_PCB);
3545                 asoc->strmout = NULL;
3546         }
3547         asoc->streamoutcnt = 0;
3548         if (asoc->strmin) {
3549                 int i;
3550                 for (i = 0; i < asoc->streamincnt; i++) {
3551                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3552                                 /* We have somethings on the streamin queue */
3553                                 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3554                                 while (chk) {
3555                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3556                                             chk, sctp_next);
3557                                         if (chk->data) {
3558                                                 sctp_m_freem(chk->data);
3559                                                 chk->data = NULL;
3560                                         }
3561                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3562                                             chk);
3563                                         sctppcbinfo.ipi_count_chunk--;
3564                                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3565                                                 panic("Chunk count is negative");
3566                                         }
3567                                         sctppcbinfo.ipi_gencnt_chunk++;
3568                                         chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3569                                 }
3570                         }
3571                 }
3572                 FREE(asoc->strmin, M_PCB);
3573                 asoc->strmin = NULL;
3574         }
3575         asoc->streamincnt = 0;
3576         /* local addresses, if any */
3577         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3578                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3579                 LIST_REMOVE(laddr, sctp_nxt_addr);
3580                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3581                 sctppcbinfo.ipi_count_laddr--;
3582         }
3583         /* pending asconf (address) parameters */
3584         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3585                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3586                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3587                 FREE(aparam, M_PCB);
3588         }
3589         if (asoc->last_asconf_ack_sent != NULL) {
3590                 sctp_m_freem(asoc->last_asconf_ack_sent);
3591                 asoc->last_asconf_ack_sent = NULL;
3592         }
3593         /* Insert new items here :> */
3594
3595         /* Get rid of LOCK */
3596         SCTP_TCB_LOCK_DESTROY(stcb);
3597
3598         /* now clean up the tasoc itself */
3599         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3600         sctppcbinfo.ipi_count_asoc--;
3601         if ((inp->sctp_socket->so_snd.sb_cc) ||
3602             (inp->sctp_socket->so_snd.sb_mbcnt)) {
3603                 /* This will happen when a abort is done */
3604                 inp->sctp_socket->so_snd.sb_cc = 0;
3605                 inp->sctp_socket->so_snd.sb_mbcnt = 0;
3606         }
3607         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3608                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3609                         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3610                                 /*
3611                                  * For the base fd, that is NOT in TCP pool we
3612                                  * turn off the connected flag. This allows
3613                                  * non-listening endpoints to connect/shutdown/
3614                                  * connect.
3615                                  */
3616                                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3617                                 soisdisconnected(inp->sctp_socket);
3618                         }
3619                         /*
3620                          * For those that are in the TCP pool we just leave
3621                          * so it cannot be used. When they close the fd we
3622                          * will free it all.
3623                          */
3624                 }
3625         }
3626         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3627                 sctp_inpcb_free(inp, 0);
3628         }
3629         crit_exit();
3630 }
3631
3632
3633 /*
3634  * determine if a destination is "reachable" based upon the addresses
3635  * bound to the current endpoint (e.g. only v4 or v6 currently bound)
3636  */
3637 /*
3638  * FIX: if we allow assoc-level bindx(), then this needs to be fixed
3639  * to use assoc level v4/v6 flags, as the assoc *may* not have the
3640  * same address types bound as its endpoint
3641  */
3642 int
3643 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
3644 {
3645         struct sctp_inpcb *inp;
3646         int answer;
3647
3648         /* No locks here, the TCB, in all cases is already
3649          * locked and an assoc is up. There is either a
3650          * INP lock by the caller applied (in asconf case when
3651          * deleting an address) or NOT in the HB case, however
3652          * if HB then the INP increment is up and the INP
3653          * will not be removed (on top of the fact that
3654          * we have a TCB lock). So we only want to
3655          * read the sctp_flags, which is either bound-all
3656          * or not.. no protection needed since once an
3657          * assoc is up you can't be changing your binding.
3658          */
3659         inp = stcb->sctp_ep;
3660         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3661                 /* if bound all, destination is not restricted */
3662                 /* RRS: Question during lock work: Is this
3663                  * correct? If you are bound-all you still
3664                  * might need to obey the V4--V6 flags???
3665                  * IMO this bound-all stuff needs to be removed!
3666                  */
3667                 return (1);
3668         }
3669         /* NOTE: all "scope" checks are done when local addresses are added */
3670         if (destaddr->sa_family == AF_INET6) {
3671 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3672                 answer = inp->inp_vflag & INP_IPV6;
3673 #else
3674                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
3675 #endif
3676         } else if (destaddr->sa_family == AF_INET) {
3677 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3678                 answer = inp->inp_vflag & INP_IPV4;
3679 #else
3680                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
3681 #endif
3682         } else {
3683                 /* invalid family, so it's unreachable */
3684                 answer = 0;
3685         }
3686         return (answer);
3687 }
3688
3689 /*
3690  * update the inp_vflags on an endpoint
3691  */
3692 static void
3693 sctp_update_ep_vflag(struct sctp_inpcb *inp) {
3694         struct sctp_laddr *laddr;
3695
3696         /* first clear the flag */
3697 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3698         inp->inp_vflag = 0;
3699 #else
3700         inp->ip_inp.inp.inp_vflag = 0;
3701 #endif
3702         /* set the flag based on addresses on the ep list */
3703         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3704                 if (laddr->ifa == NULL) {
3705 #ifdef SCTP_DEBUG
3706                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3707                                 printf("An ounce of prevention is worth a pound of cure\n");
3708                         }
3709 #endif /* SCTP_DEBUG */
3710                         continue;
3711                 }
3712                 if (laddr->ifa->ifa_addr) {
3713                         continue;
3714                 }
3715                 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
3716 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3717                         inp->inp_vflag |= INP_IPV6;
3718 #else
3719                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3720 #endif
3721                 } else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
3722 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3723                         inp->inp_vflag |= INP_IPV4;
3724 #else
3725                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3726 #endif
3727                 }
3728         }
3729 }
3730
3731 /*
3732  * Add the address to the endpoint local address list
3733  * There is nothing to be done if we are bound to all addresses
3734  */
3735 int
3736 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3737 {
3738         struct sctp_laddr *laddr;
3739         int fnd, error;
3740         fnd = 0;
3741
3742         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3743                 /* You are already bound to all. You have it already */
3744                 return (0);
3745         }
3746         if (ifa->ifa_addr->sa_family == AF_INET6) {
3747                 struct in6_ifaddr *ifa6;
3748                 ifa6 = (struct in6_ifaddr *)ifa;
3749                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3750                     IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
3751                         /* Can't bind a non-existent addr. */
3752                         return (-1);
3753         }
3754         /* first, is it already present? */
3755         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3756                 if (laddr->ifa == ifa) {
3757                         fnd = 1;
3758                         break;
3759                 }
3760         }
3761
3762         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
3763                 /* Not bound to all */
3764                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
3765                 if (error != 0)
3766                         return (error);
3767                 inp->laddr_count++;
3768                 /* update inp_vflag flags */
3769                 if (ifa->ifa_addr->sa_family == AF_INET6) {
3770 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3771                         inp->inp_vflag |= INP_IPV6;
3772 #else
3773                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3774 #endif
3775                 } else if (ifa->ifa_addr->sa_family == AF_INET) {
3776 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3777                         inp->inp_vflag |= INP_IPV4;
3778 #else
3779                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3780 #endif
3781                 }
3782         }
3783         return (0);
3784 }
3785
3786
3787 /*
3788  * select a new (hopefully reachable) destination net
3789  * (should only be used when we deleted an ep addr that is the
3790  * only usable source address to reach the destination net)
3791  */
3792 static void
3793 sctp_select_primary_destination(struct sctp_tcb *stcb)
3794 {
3795         struct sctp_nets *net;
3796
3797         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3798                 /* for now, we'll just pick the first reachable one we find */
3799                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
3800                         continue;
3801                 if (sctp_destination_is_reachable(stcb,
3802                     (struct sockaddr *)&net->ro._l_addr)) {
3803                         /* found a reachable destination */
3804                         stcb->asoc.primary_destination = net;
3805                 }
3806         }
3807         /* I can't there from here! ...we're gonna die shortly... */
3808 }
3809
3810
3811 /*
3812  * Delete the address from the endpoint local address list
3813  * There is nothing to be done if we are bound to all addresses
3814  */
3815 int
3816 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3817 {
3818         struct sctp_laddr *laddr;
3819         int fnd;
3820         fnd = 0;
3821         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3822                 /* You are already bound to all. You have it already */
3823                 return (EINVAL);
3824         }
3825
3826         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3827                 if (laddr->ifa == ifa) {
3828                         fnd = 1;
3829                         break;
3830                 }
3831         }
3832         if (fnd && (inp->laddr_count < 2)) {
3833                 /* can't delete unless there are at LEAST 2 addresses */
3834                 return (-1);
3835         }
3836         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
3837                 /*
3838                  * clean up any use of this address
3839                  * go through our associations and clear any
3840                  *  last_used_address that match this one
3841                  * for each assoc, see if a new primary_destination is needed
3842                  */
3843                 struct sctp_tcb *stcb;
3844
3845                 /* clean up "next_addr_touse" */
3846                 if (inp->next_addr_touse == laddr)
3847                         /* delete this address */
3848                         inp->next_addr_touse = NULL;
3849
3850                 /* clean up "last_used_address" */
3851                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3852                         if (stcb->asoc.last_used_address == laddr)
3853                                 /* delete this address */
3854                                 stcb->asoc.last_used_address = NULL;
3855                 } /* for each tcb */
3856
3857                 /* remove it from the ep list */
3858                 sctp_remove_laddr(laddr);
3859                 inp->laddr_count--;
3860                 /* update inp_vflag flags */
3861                 sctp_update_ep_vflag(inp);
3862                 /* select a new primary destination if needed */
3863                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3864                         /* presume caller (sctp_asconf.c) already owns INP lock */
3865                         SCTP_TCB_LOCK(stcb);
3866                         if (sctp_destination_is_reachable(stcb,
3867                             (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr) == 0) {
3868                                 sctp_select_primary_destination(stcb);
3869                         }
3870                         SCTP_TCB_UNLOCK(stcb);
3871                 } /* for each tcb */
3872         }
3873         return (0);
3874 }
3875
3876 /*
3877  * Add the addr to the TCB local address list
3878  * For the BOUNDALL or dynamic case, this is a "pending" address list
3879  * (eg. addresses waiting for an ASCONF-ACK response)
3880  * For the subset binding, static case, this is a "valid" address list
3881  */
3882 int
3883 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3884 {
3885         struct sctp_inpcb *inp;
3886         struct sctp_laddr *laddr;
3887         int error;
3888
3889         /* Assumes TCP is locked.. and possiblye
3890          * the INP. May need to confirm/fix that if
3891          * we need it and is not the case.
3892          */
3893         inp = stcb->sctp_ep;
3894         if (ifa->ifa_addr->sa_family == AF_INET6) {
3895                 struct in6_ifaddr *ifa6;
3896                 ifa6 = (struct in6_ifaddr *)ifa;
3897                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3898                     /* IN6_IFF_DEPRECATED | */
3899                     IN6_IFF_ANYCAST |
3900                     IN6_IFF_NOTREADY))
3901                         /* Can't bind a non-existent addr. */
3902                         return (-1);
3903         }
3904         /* does the address already exist? */
3905         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3906                 if (laddr->ifa == ifa) {
3907                         return (-1);
3908                 }
3909         }
3910
3911         /* add to the list */
3912         error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
3913         if (error != 0)
3914                 return (error);
3915         return (0);
3916 }
3917
3918 /*
3919  * insert an laddr entry with the given ifa for the desired list
3920  */
3921 int
3922 sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa) {
3923         struct sctp_laddr *laddr;
3924
3925         crit_enter();
3926         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
3927         if (laddr == NULL) {
3928                 /* out of memory? */
3929                 crit_exit();
3930                 return (EINVAL);
3931         }
3932         sctppcbinfo.ipi_count_laddr++;
3933         sctppcbinfo.ipi_gencnt_laddr++;
3934         bzero(laddr, sizeof(*laddr));
3935         laddr->ifa = ifa;
3936         /* insert it */
3937         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
3938
3939         crit_exit();
3940         return (0);
3941 }
3942
3943 /*
3944  * Remove an laddr entry from the local address list (on an assoc)
3945  */
3946 void
3947 sctp_remove_laddr(struct sctp_laddr *laddr)
3948 {
3949         crit_enter();
3950         /* remove from the list */
3951         LIST_REMOVE(laddr, sctp_nxt_addr);
3952         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3953         sctppcbinfo.ipi_count_laddr--;
3954         sctppcbinfo.ipi_gencnt_laddr++;
3955         crit_exit();
3956 }
3957
3958 /*
3959  * Remove an address from the TCB local address list
3960  */
3961 int
3962 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3963 {
3964         struct sctp_inpcb *inp;
3965         struct sctp_laddr *laddr;
3966
3967         /* This is called by asconf work. It is assumed that
3968          * a) The TCB is locked
3969          * and
3970          * b) The INP is locked.
3971          * This is true in as much as I can trace through
3972          * the entry asconf code where I did these locks.
3973          * Again, the ASCONF code is a bit different in
3974          * that it does lock the INP during its work often
3975          * times. This must be since we don't want other
3976          * proc's looking up things while what they are
3977          * looking up is changing :-D
3978          */
3979
3980         inp = stcb->sctp_ep;
3981         /* if subset bound and don't allow ASCONF's, can't delete last */
3982         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
3983             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
3984                 if (stcb->asoc.numnets < 2) {
3985                         /* can't delete last address */
3986                         return (-1);
3987                 }
3988         }
3989
3990         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3991                 /* remove the address if it exists */
3992                 if (laddr->ifa == NULL)
3993                         continue;
3994                 if (laddr->ifa == ifa) {
3995                         sctp_remove_laddr(laddr);
3996                         return (0);
3997                 }
3998         }
3999
4000         /* address not found! */
4001         return (-1);
4002 }
4003
4004 /*
4005  * Remove an address from the TCB local address list
4006  * lookup using a sockaddr addr
4007  */
4008 int
4009 sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
4010 {
4011         struct sctp_inpcb *inp;
4012         struct sctp_laddr *laddr;
4013         struct sockaddr *l_sa;
4014
4015         /*
4016          * This function I find does not seem to have a caller.
4017          * As such we NEED TO DELETE this code. If we do
4018          * find a caller, the caller MUST have locked the TCB
4019          * at the least and probably the INP as well.
4020          */
4021         inp = stcb->sctp_ep;
4022         /* if subset bound and don't allow ASCONF's, can't delete last */
4023         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4024             ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4025                 if (stcb->asoc.numnets < 2) {
4026                         /* can't delete last address */
4027                         return (-1);
4028                 }
4029         }
4030
4031         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4032                 /* make sure the address exists */
4033                 if (laddr->ifa == NULL)
4034                         continue;
4035                 if (laddr->ifa->ifa_addr == NULL)
4036                         continue;
4037
4038                 l_sa = laddr->ifa->ifa_addr;
4039                 if (l_sa->sa_family == AF_INET6) {
4040                         /* IPv6 address */
4041                         struct sockaddr_in6 *sin1, *sin2;
4042                         sin1 = (struct sockaddr_in6 *)l_sa;
4043                         sin2 = (struct sockaddr_in6 *)sa;
4044                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4045                             sizeof(struct in6_addr)) == 0) {
4046                                 /* matched */
4047                                 sctp_remove_laddr(laddr);
4048                                 return (0);
4049                         }
4050                 } else if (l_sa->sa_family == AF_INET) {
4051                         /* IPv4 address */
4052                         struct sockaddr_in *sin1, *sin2;
4053                         sin1 = (struct sockaddr_in *)l_sa;
4054                         sin2 = (struct sockaddr_in *)sa;
4055                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4056                                 /* matched */
4057                                 sctp_remove_laddr(laddr);
4058                                 return (0);
4059                         }
4060                 } else {
4061                         /* invalid family */
4062                         return (-1);
4063                 }
4064         } /* end foreach */
4065         /* address not found! */
4066         return (-1);
4067 }
4068
4069 static char sctp_pcb_initialized = 0;
4070
4071 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4072 /* sysctl */
4073 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4074 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4075
4076 #endif /* FreeBSD || APPLE || DragonFly */
4077
4078 #ifndef SCTP_TCBHASHSIZE
4079 #define SCTP_TCBHASHSIZE 1024
4080 #endif
4081
4082 #ifndef SCTP_CHUNKQUEUE_SCALE
4083 #define SCTP_CHUNKQUEUE_SCALE 10
4084 #endif
4085
4086 void
4087 sctp_pcb_init()
4088 {
4089         /*
4090          * SCTP initialization for the PCB structures
4091          * should be called by the sctp_init() funciton.
4092          */
4093         int i;
4094         int hashtblsize = SCTP_TCBHASHSIZE;
4095
4096 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4097         int sctp_chunkscale = SCTP_CHUNKQUEUE_SCALE;
4098 #endif
4099
4100         if (sctp_pcb_initialized != 0) {
4101                 /* error I was called twice */
4102                 return;
4103         }
4104         sctp_pcb_initialized = 1;
4105
4106         /* Init all peg counts */
4107         for (i = 0; i < SCTP_NUMBER_OF_PEGS; i++) {
4108                 sctp_pegs[i] = 0;
4109         }
4110
4111         /* init the empty list of (All) Endpoints */
4112         LIST_INIT(&sctppcbinfo.listhead);
4113
4114         /* init the iterator head */
4115         LIST_INIT(&sctppcbinfo.iteratorhead);
4116
4117         /* init the hash table of endpoints */
4118 #if defined(__FreeBSD__)
4119 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
4120         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &hashtblsize);
4121         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4122         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4123 #else
4124         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
4125             hashtblsize);
4126         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
4127             sctp_pcbtblsize);
4128         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
4129             sctp_chunkscale);
4130 #endif
4131 #endif
4132
4133         sctppcbinfo.sctp_asochash = hashinit((hashtblsize * 31),
4134 #ifdef __NetBSD__
4135             HASH_LIST,
4136 #endif
4137             M_PCB,
4138 #if defined(__NetBSD__) || defined(__OpenBSD__)
4139             M_WAITOK,
4140 #endif
4141             &sctppcbinfo.hashasocmark);
4142
4143         sctppcbinfo.sctp_ephash = hashinit(hashtblsize,
4144 #ifdef __NetBSD__
4145             HASH_LIST,
4146 #endif
4147             M_PCB,
4148 #if defined(__NetBSD__) || defined(__OpenBSD__)
4149             M_WAITOK,
4150 #endif
4151             &sctppcbinfo.hashmark);
4152
4153         sctppcbinfo.sctp_tcpephash = hashinit(hashtblsize,
4154 #ifdef __NetBSD__
4155             HASH_LIST,
4156 #endif
4157             M_PCB,
4158 #if defined(__NetBSD__) || defined(__OpenBSD__)
4159             M_WAITOK,
4160 #endif
4161             &sctppcbinfo.hashtcpmark);
4162
4163         sctppcbinfo.hashtblsize = hashtblsize;
4164
4165         /* init the zones */
4166         /*
4167          * FIX ME: Should check for NULL returns, but if it does fail we
4168          * are doomed to panic anyways... add later maybe.
4169          */
4170         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4171             sizeof(struct sctp_inpcb), maxsockets);
4172
4173         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4174             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4175
4176         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4177             sizeof(struct sctp_laddr),
4178             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4179
4180         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4181             sizeof(struct sctp_nets),
4182             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4183
4184         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4185             sizeof(struct sctp_tmit_chunk),
4186             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4187             sctp_chunkscale));
4188
4189         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_sockq, "sctp_sockq",
4190             sizeof(struct sctp_socket_q_list),
4191             (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4192             sctp_chunkscale));
4193
4194         /* Master Lock INIT for info structure */
4195         SCTP_INP_INFO_LOCK_INIT();
4196         SCTP_ITERATOR_LOCK_INIT();
4197         /* not sure if we need all the counts */
4198         sctppcbinfo.ipi_count_ep = 0;
4199         sctppcbinfo.ipi_gencnt_ep = 0;
4200         /* assoc/tcb zone info */
4201         sctppcbinfo.ipi_count_asoc = 0;
4202         sctppcbinfo.ipi_gencnt_asoc = 0;
4203         /* local addrlist zone info */
4204         sctppcbinfo.ipi_count_laddr = 0;
4205         sctppcbinfo.ipi_gencnt_laddr = 0;
4206         /* remote addrlist zone info */
4207         sctppcbinfo.ipi_count_raddr = 0;
4208         sctppcbinfo.ipi_gencnt_raddr = 0;
4209         /* chunk info */
4210         sctppcbinfo.ipi_count_chunk = 0;
4211         sctppcbinfo.ipi_gencnt_chunk = 0;
4212
4213         /* socket queue zone info */
4214         sctppcbinfo.ipi_count_sockq = 0;
4215         sctppcbinfo.ipi_gencnt_sockq = 0;
4216
4217         /* mbuf tracker */
4218         sctppcbinfo.mbuf_track = 0;
4219         /* port stuff */
4220 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) \
4221     || defined(__DragonFly__)
4222         sctppcbinfo.lastlow = ipport_firstauto;
4223 #else
4224         sctppcbinfo.lastlow = anonportmin;
4225 #endif
4226         /* Init the TIMEWAIT list */
4227         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4228                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4229         }
4230
4231 #if defined(_SCTP_NEEDS_CALLOUT_) && !defined(__APPLE__)
4232         TAILQ_INIT(&sctppcbinfo.callqueue);
4233 #endif
4234
4235 }
4236
4237 int
4238 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4239     int iphlen, int offset, int limit, struct sctphdr *sh,
4240     struct sockaddr *altsa)
4241 {
4242         /*
4243          * grub through the INIT pulling addresses and
4244          * loading them to the nets structure in the asoc.
4245          * The from address in the mbuf should also be loaded
4246          * (if it is not already). This routine can be called
4247          * with either INIT or INIT-ACK's as long as the
4248          * m points to the IP packet and the offset points
4249          * to the beginning of the parameters.
4250          */
4251         struct sctp_inpcb *inp, *l_inp;
4252         struct sctp_nets *net, *net_tmp;
4253         struct ip *iph;
4254         struct sctp_paramhdr *phdr, parm_buf;
4255         struct sctp_tcb *stcb_tmp;
4256         u_int16_t ptype, plen;
4257         struct sockaddr *sa;
4258         struct sockaddr_storage dest_store;
4259         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4260         struct sockaddr_in sin;
4261         struct sockaddr_in6 sin6;
4262
4263         /* First get the destination address setup too. */
4264         memset(&sin, 0, sizeof(sin));
4265         memset(&sin6, 0, sizeof(sin6));
4266
4267         sin.sin_family = AF_INET;
4268         sin.sin_len = sizeof(sin);
4269         sin.sin_port = stcb->rport;
4270
4271         sin6.sin6_family = AF_INET6;
4272         sin6.sin6_len = sizeof(struct sockaddr_in6);
4273         sin6.sin6_port = stcb->rport;
4274         if (altsa == NULL) {
4275                 iph = mtod(m, struct ip *);
4276                 if (iph->ip_v == IPVERSION) {
4277                         /* its IPv4 */
4278                         struct sockaddr_in *sin_2;
4279                         sin_2 = (struct sockaddr_in *)(local_sa);
4280                         memset(sin_2, 0, sizeof(sin));
4281                         sin_2->sin_family = AF_INET;
4282                         sin_2->sin_len = sizeof(sin);
4283                         sin_2->sin_port = sh->dest_port;
4284                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr ;
4285                         sin.sin_addr = iph->ip_src;
4286                         sa = (struct sockaddr *)&sin;
4287                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4288                         /* its IPv6 */
4289                         struct ip6_hdr *ip6;
4290                         struct sockaddr_in6 *sin6_2;
4291
4292                         ip6 = mtod(m, struct ip6_hdr *);
4293                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4294                         memset(sin6_2, 0, sizeof(sin6));
4295                         sin6_2->sin6_family = AF_INET6;
4296                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4297                         sin6_2->sin6_port = sh->dest_port;
4298                         sin6.sin6_addr = ip6->ip6_src;
4299                         sa = (struct sockaddr *)&sin6;
4300                 } else {
4301                         sa = NULL;
4302                 }
4303         } else {
4304                 /*
4305                  * For cookies we use the src address NOT from the packet
4306                  * but from the original INIT
4307                  */
4308                 sa = altsa;
4309         }
4310         /* Turn off ECN until we get through all params */
4311         stcb->asoc.ecn_allowed = 0;
4312
4313         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4314                 /* mark all addresses that we have currently on the list */
4315                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4316         }
4317         /* does the source address already exist? if so skip it */
4318         l_inp = inp = stcb->sctp_ep;
4319         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4320         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4321                 /* we must add the source address */
4322                 /* no scope set here since we have a tcb already. */
4323                 if ((sa->sa_family == AF_INET) &&
4324                     (stcb->asoc.ipv4_addr_legal)) {
4325                         if (sctp_add_remote_addr(stcb, sa, 0, 2)) {
4326                                 return (-1);
4327                         }
4328                 } else if ((sa->sa_family == AF_INET6) &&
4329                     (stcb->asoc.ipv6_addr_legal)) {
4330                         if (sctp_add_remote_addr(stcb, sa, 0, 3)) {
4331                                 return (-1);
4332                         }
4333                 }
4334         } else {
4335                 if (net_tmp != NULL && stcb_tmp == stcb) {
4336                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4337                 } else if (stcb_tmp != stcb) {
4338                         /* It belongs to another association? */
4339                         return (-1);
4340                 }
4341         }
4342         /* since a unlock occured we must check the
4343          * TCB's state and the pcb's gone flags.
4344          */
4345         if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4346                 /* the user freed the ep */
4347                 return (-1);
4348         }
4349         if (stcb->asoc.state == 0) {
4350                 /* the assoc was freed? */
4351                 return (-1);
4352         }
4353
4354         /* now we must go through each of the params. */
4355         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4356         while (phdr) {
4357                 ptype = ntohs(phdr->param_type);
4358                 plen = ntohs(phdr->param_length);
4359                 /*printf("ptype => %d, plen => %d\n", ptype, plen);*/
4360                 if (offset + plen > limit) {
4361                         break;
4362                 }
4363                 if (plen == 0) {
4364                         break;
4365                 }
4366                 if ((ptype == SCTP_IPV4_ADDRESS) &&
4367                     (stcb->asoc.ipv4_addr_legal)) {
4368                         struct sctp_ipv4addr_param *p4, p4_buf;
4369                         /* ok get the v4 address and check/add */
4370                         phdr = sctp_get_next_param(m, offset,
4371                             (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4372                         if (plen != sizeof(struct sctp_ipv4addr_param) ||
4373                             phdr == NULL) {
4374                                 return (-1);
4375                         }
4376                         p4 = (struct sctp_ipv4addr_param *)phdr;
4377                         sin.sin_addr.s_addr = p4->addr;
4378                         sa = (struct sockaddr *)&sin;
4379                         inp = stcb->sctp_ep;
4380                         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4381                             local_sa, stcb);
4382
4383                         if ((stcb_tmp== NULL && inp == stcb->sctp_ep) ||
4384                             inp == NULL) {
4385                                 /* we must add the source address */
4386                                 /* no scope set since we have a tcb already */
4387
4388                                 /* we must validate the state again here */
4389                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4390                                         /* the user freed the ep */
4391                                         return (-1);
4392                                 }
4393                                 if (stcb->asoc.state == 0) {
4394                                         /* the assoc was freed? */
4395                                         return (-1);
4396                                 }
4397                                 if (sctp_add_remote_addr(stcb, sa, 0, 4)) {
4398                                         return (-1);
4399                                 }
4400                         } else if (stcb_tmp == stcb) {
4401                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4402                                         /* the user freed the ep */
4403                                         return (-1);
4404                                 }
4405                                 if (stcb->asoc.state == 0) {
4406                                         /* the assoc was freed? */
4407                                         return (-1);
4408                                 }
4409                                 if (net != NULL) {
4410                                         /* clear flag */
4411                                         net->dest_state &=
4412                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4413                                 }
4414                         } else {
4415                                 /* strange, address is in another assoc?
4416                                  * straighten out locks.
4417                                  */
4418                                 SCTP_TCB_UNLOCK(stcb_tmp);
4419                                 SCTP_INP_RLOCK(inp);
4420                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4421                                         /* the user freed the ep */
4422                                         SCTP_INP_RUNLOCK(l_inp);
4423                                         return (-1);
4424                                 }
4425                                 if (stcb->asoc.state == 0) {
4426                                         /* the assoc was freed? */
4427                                         SCTP_INP_RUNLOCK(l_inp);
4428                                         return (-1);
4429                                 }
4430                                 SCTP_TCB_LOCK(stcb);
4431                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
4432                                 return (-1);
4433                         }
4434                 } else if ((ptype == SCTP_IPV6_ADDRESS) &&
4435                     (stcb->asoc.ipv6_addr_legal)) {
4436                         /* ok get the v6 address and check/add */
4437                         struct sctp_ipv6addr_param *p6, p6_buf;
4438                         phdr = sctp_get_next_param(m, offset,
4439                             (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4440                         if (plen != sizeof(struct sctp_ipv6addr_param) ||
4441                             phdr == NULL) {
4442                                 return (-1);
4443                         }
4444                         p6 = (struct sctp_ipv6addr_param *)phdr;
4445                         memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4446                             sizeof(p6->addr));
4447                         sa = (struct sockaddr *)&sin6;
4448                         inp = stcb->sctp_ep;
4449                         stcb_tmp= sctp_findassociation_ep_addr(&inp, sa, &net,
4450                             local_sa, stcb);
4451                         if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4452                             inp == NULL)) {
4453                                 /* we must validate the state again here */
4454                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4455                                         /* the user freed the ep */
4456                                         return (-1);
4457                                 }
4458                                 if (stcb->asoc.state == 0) {
4459                                         /* the assoc was freed? */
4460                                         return (-1);
4461                                 }
4462                                 /* we must add the address, no scope set */
4463                                 if (sctp_add_remote_addr(stcb, sa, 0, 5)) {
4464                                         return (-1);
4465                                 }
4466                         } else if (stcb_tmp == stcb) {
4467                                 /* we must validate the state again here */
4468                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4469                                         /* the user freed the ep */
4470                                         return (-1);
4471                                 }
4472                                 if (stcb->asoc.state == 0) {
4473                                         /* the assoc was freed? */
4474                                         return (-1);
4475                                 }
4476                                 if (net != NULL) {
4477                                         /* clear flag */
4478                                         net->dest_state &=
4479                                             ~SCTP_ADDR_NOT_IN_ASSOC;
4480                                 }
4481                         } else {
4482                                 /* strange, address is in another assoc?
4483                                  * straighten out locks.
4484                                  */
4485                                 SCTP_TCB_UNLOCK(stcb_tmp);
4486                                 SCTP_INP_RLOCK(l_inp);
4487                                 /* we must validate the state again here */
4488                                 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4489                                         /* the user freed the ep */
4490                                         SCTP_INP_RUNLOCK(l_inp);
4491                                         return (-1);
4492                                 }
4493                                 if (stcb->asoc.state == 0) {
4494                                         /* the assoc was freed? */
4495                                         SCTP_INP_RUNLOCK(l_inp);
4496                                         return (-1);
4497                                 }
4498                                 SCTP_TCB_LOCK(stcb);
4499                                 SCTP_INP_RUNLOCK(l_inp);
4500                                 return (-1);
4501                         }
4502                 } else if (ptype == SCTP_ECN_CAPABLE) {
4503                         stcb->asoc.ecn_allowed = 1;
4504                 } else if (ptype == SCTP_ULP_ADAPTION) {
4505                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
4506                                 struct sctp_adaption_layer_indication ai, *aip;
4507
4508                                 phdr = sctp_get_next_param(m, offset,
4509                                                            (struct sctp_paramhdr *)&ai, sizeof(ai));
4510                                 aip = (struct sctp_adaption_layer_indication *)phdr;
4511                                 sctp_ulp_notify(SCTP_NOTIFY_ADAPTION_INDICATION,
4512                                                 stcb, ntohl(aip->indication), NULL);
4513                         }
4514                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4515                         struct sctp_asconf_addr_param lstore, *fee;
4516                         struct sctp_asconf_addrv4_param *fii;
4517                         int lptype;
4518                         struct sockaddr *lsa = NULL;
4519
4520                         stcb->asoc.peer_supports_asconf = 1;
4521                         stcb->asoc.peer_supports_asconf_setprim = 1;
4522                         if (plen > sizeof(lstore)) {
4523                                 return (-1);
4524                         }
4525                         phdr = sctp_get_next_param(m, offset,
4526                             (struct sctp_paramhdr *)&lstore, plen);
4527                         if (phdr == NULL) {
4528                                 return (-1);
4529                         }
4530
4531                         fee  = (struct sctp_asconf_addr_param *)phdr;
4532                         lptype = ntohs(fee->addrp.ph.param_type);
4533                         if (lptype == SCTP_IPV4_ADDRESS) {
4534                                 if (plen !=
4535                                     sizeof(struct sctp_asconf_addrv4_param)) {
4536                                         printf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4537                                            (int)sizeof(struct sctp_asconf_addrv4_param),
4538                                            plen);
4539                                 } else {
4540                                         fii = (struct sctp_asconf_addrv4_param *)fee;
4541                                         sin.sin_addr.s_addr = fii->addrp.addr;
4542                                         lsa = (struct sockaddr *)&sin;
4543                                 }
4544                         } else if (lptype == SCTP_IPV6_ADDRESS) {
4545                                 if (plen !=
4546                                     sizeof(struct sctp_asconf_addr_param)) {
4547                                         printf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4548                                            (int)sizeof(struct sctp_asconf_addr_param),
4549                                            plen);
4550                                 } else {
4551                                         memcpy(sin6.sin6_addr.s6_addr,
4552                                             fee->addrp.addr,
4553                                             sizeof(fee->addrp.addr));
4554                                         lsa = (struct sockaddr *)&sin6;
4555                                 }
4556                         }
4557                         if (lsa) {
4558                                 sctp_set_primary_addr(stcb, sa, NULL);
4559                         }
4560
4561                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4562                         /* Peer supports pr-sctp */
4563                         stcb->asoc.peer_supports_prsctp = 1;
4564                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4565                         /* A supported extension chunk */
4566                         struct sctp_supported_chunk_types_param *pr_supported;
4567                         uint8_t local_store[128];
4568                         int num_ent, i;
4569
4570                         phdr = sctp_get_next_param(m, offset,
4571                             (struct sctp_paramhdr *)&local_store, plen);
4572                         if (phdr == NULL) {
4573                                 return (-1);
4574                         }
4575                         stcb->asoc.peer_supports_asconf = 0;
4576                         stcb->asoc.peer_supports_asconf_setprim = 0;
4577                         stcb->asoc.peer_supports_prsctp = 0;
4578                         stcb->asoc.peer_supports_pktdrop = 0;
4579                         stcb->asoc.peer_supports_strreset = 0;
4580                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4581                         num_ent = plen - sizeof(struct sctp_paramhdr);
4582                         for (i=0; i<num_ent; i++) {
4583                                 switch (pr_supported->chunk_types[i]) {
4584                                 case SCTP_ASCONF:
4585                                         stcb->asoc.peer_supports_asconf = 1;
4586                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4587                                         break;
4588                                 case SCTP_ASCONF_ACK:
4589                                         stcb->asoc.peer_supports_asconf = 1;
4590                                         stcb->asoc.peer_supports_asconf_setprim = 1;
4591                                         break;
4592                                 case SCTP_FORWARD_CUM_TSN:
4593                                         stcb->asoc.peer_supports_prsctp = 1;
4594                                         break;
4595                                 case SCTP_PACKET_DROPPED:
4596                                         stcb->asoc.peer_supports_pktdrop = 1;
4597                                         break;
4598                                 case SCTP_STREAM_RESET:
4599                                         stcb->asoc.peer_supports_strreset = 1;
4600                                         break;
4601                                 default:
4602                                         /* one I have not learned yet */
4603                                         break;
4604
4605                                 }
4606                         }
4607                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4608                         /* Peer supports ECN-nonce */
4609                         stcb->asoc.peer_supports_ecn_nonce = 1;
4610                         stcb->asoc.ecn_nonce_allowed = 1;
4611                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4612                            (ptype == SCTP_STATE_COOKIE) ||
4613                            (ptype == SCTP_UNRECOG_PARAM) ||
4614                            (ptype == SCTP_COOKIE_PRESERVE) ||
4615                            (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4616                            (ptype == SCTP_ADD_IP_ADDRESS) ||
4617                            (ptype == SCTP_DEL_IP_ADDRESS) ||
4618                            (ptype == SCTP_ERROR_CAUSE_IND) ||
4619                            (ptype == SCTP_SUCCESS_REPORT)) {
4620                         /* don't care */;
4621                 } else {
4622                         if ((ptype & 0x8000) == 0x0000) {
4623                                 /* must stop processing the rest of
4624                                  * the param's. Any report bits were
4625                                  * handled with the call to sctp_arethere_unrecognized_parameters()
4626                                  * when the INIT or INIT-ACK was first seen.
4627                                  */
4628                                 break;
4629                         }
4630                 }
4631                 offset += SCTP_SIZE32(plen);
4632                 if (offset >= limit) {
4633                         break;
4634                 }
4635                 phdr = sctp_get_next_param(m, offset, &parm_buf,
4636                     sizeof(parm_buf));
4637         }
4638         /* Now check to see if we need to purge any addresses */
4639         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
4640                 net_tmp = TAILQ_NEXT(net, sctp_next);
4641                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
4642                     SCTP_ADDR_NOT_IN_ASSOC) {
4643                         /* This address has been removed from the asoc */
4644                         /* remove and free it */
4645                         stcb->asoc.numnets--;
4646                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
4647                         sctp_free_remote_addr(net);
4648                         if (net == stcb->asoc.primary_destination) {
4649                                 stcb->asoc.primary_destination = NULL;
4650                                 sctp_select_primary_destination(stcb);
4651                         }
4652                 }
4653         }
4654         return (0);
4655 }
4656
4657 int
4658 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
4659     struct sctp_nets *net)
4660 {
4661         /* make sure the requested primary address exists in the assoc */
4662         if (net == NULL && sa)
4663                 net = sctp_findnet(stcb, sa);
4664
4665         if (net == NULL) {
4666                 /* didn't find the requested primary address! */
4667                 return (-1);
4668         } else {
4669                 /* set the primary address */
4670                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
4671                         /* Must be confirmed */
4672                         return (-1);
4673                 }
4674                 stcb->asoc.primary_destination = net;
4675                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
4676                 return (0);
4677         }
4678 }
4679
4680
4681 int
4682 sctp_is_vtag_good(struct sctp_inpcb *inp, u_int32_t tag, struct timeval *now)
4683 {
4684         /*
4685          * This function serves two purposes. It will see if a TAG can be
4686          * re-used and return 1 for yes it is ok and 0 for don't use that
4687          * tag.
4688          * A secondary function it will do is purge out old tags that can
4689          * be removed.
4690          */
4691         struct sctpasochead *head;
4692         struct sctpvtaghead *chain;
4693         struct sctp_tagblock *twait_block;
4694         struct sctp_tcb *stcb;
4695
4696         int i;
4697         SCTP_INP_INFO_WLOCK();
4698         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4699         /* First is the vtag in use ? */
4700
4701         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
4702             sctppcbinfo.hashasocmark)];
4703         if (head == NULL) {
4704                 SCTP_INP_INFO_WUNLOCK();
4705                 return (0);
4706         }
4707         LIST_FOREACH(stcb, head, sctp_asocs) {
4708                 if (stcb->asoc.my_vtag == tag) {
4709                         /* We should remove this if and
4710                          * return 0 always if we want vtags
4711                          * unique across all endpoints. For
4712                          * now within a endpoint is ok.
4713                          */
4714                         if (inp == stcb->sctp_ep) {
4715                                 /* bad tag, in use */
4716                                 SCTP_INP_INFO_WUNLOCK();
4717                                 return (0);
4718                         }
4719                 }
4720         }
4721         if (!LIST_EMPTY(chain)) {
4722                 /*
4723                  * Block(s) are present, lets see if we have this tag in
4724                  * the list
4725                  */
4726                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4727                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4728                                 if (twait_block->vtag_block[i].v_tag == 0) {
4729                                         /* not used */
4730                                         continue;
4731                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
4732                                     now->tv_sec) {
4733                                         /* Audit expires this guy */
4734                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4735                                         twait_block->vtag_block[i].v_tag = 0;
4736                                 } else if (twait_block->vtag_block[i].v_tag ==
4737                                     tag) {
4738                                         /* Bad tag, sorry :< */
4739                                         SCTP_INP_INFO_WUNLOCK();
4740                                         return (0);
4741                                 }
4742                         }
4743                 }
4744         }
4745         /* Not found, ok to use the tag */
4746         SCTP_INP_INFO_WUNLOCK();
4747         return (1);
4748 }
4749
4750
4751 /*
4752  * Delete the address from the endpoint local address list
4753  * Lookup using a sockaddr address (ie. not an ifaddr)
4754  */
4755 int
4756 sctp_del_local_addr_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa)
4757 {
4758         struct sctp_laddr *laddr;
4759         struct sockaddr *l_sa;
4760         int found = 0;
4761         /* Here is another function I cannot find a
4762          * caller for. As such we SHOULD delete it
4763          * if we have no users. If we find a user that
4764          * user MUST have the INP locked.
4765          *
4766          */
4767
4768         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4769                 /* You are already bound to all. You have it already */
4770                 return (EINVAL);
4771         }
4772
4773         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4774                 /* make sure the address exists */
4775                 if (laddr->ifa == NULL)
4776                         continue;
4777                 if (laddr->ifa->ifa_addr == NULL)
4778                         continue;
4779
4780                 l_sa = laddr->ifa->ifa_addr;
4781                 if (l_sa->sa_family == AF_INET6) {
4782                         /* IPv6 address */
4783                         struct sockaddr_in6 *sin1, *sin2;
4784                         sin1 = (struct sockaddr_in6 *)l_sa;
4785                         sin2 = (struct sockaddr_in6 *)sa;
4786                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4787                             sizeof(struct in6_addr)) == 0) {
4788                                 /* matched */
4789                                 found = 1;
4790                                 break;
4791                         }
4792                 } else if (l_sa->sa_family == AF_INET) {
4793                         /* IPv4 address */
4794                         struct sockaddr_in *sin1, *sin2;
4795                         sin1 = (struct sockaddr_in *)l_sa;
4796                         sin2 = (struct sockaddr_in *)sa;
4797                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4798                                 /* matched */
4799                                 found = 1;
4800                                 break;
4801                         }
4802                 } else {
4803                         /* invalid family */
4804                         return (-1);
4805                 }
4806         }
4807
4808         if (found && inp->laddr_count < 2) {
4809                 /* can't delete unless there are at LEAST 2 addresses */
4810                 return (-1);
4811         }
4812
4813         if (found && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
4814                 /*
4815                  * remove it from the ep list, this should NOT be
4816                  * done until its really gone from the interface list and
4817                  * we won't be receiving more of these. Probably right
4818                  * away. If we do allow a removal of an address from
4819                  * an association (sub-set bind) than this should NOT
4820                  * be called until the all ASCONF come back from this
4821                  * association.
4822                  */
4823                 sctp_remove_laddr(laddr);
4824                 return (0);
4825         } else {
4826                 return (-1);
4827         }
4828 }
4829
4830 static void
4831 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4832 {
4833         /*
4834          * We must hunt this association for MBUF's past the cumack
4835          * (i.e. out of order data that we can renege on).
4836          */
4837         struct sctp_association *asoc;
4838         struct sctp_tmit_chunk *chk, *nchk;
4839         u_int32_t cumulative_tsn_p1, tsn;
4840         int cnt, strmat, gap;
4841         /* We look for anything larger than the cum-ack + 1 */
4842
4843         asoc = &stcb->asoc;
4844         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
4845         cnt = 0;
4846         /* First look in the re-assembly queue */
4847         chk = TAILQ_FIRST(&asoc->reasmqueue);
4848         while (chk) {
4849                 /* Get the next one */
4850                 nchk = TAILQ_NEXT(chk, sctp_next);
4851                 if (compare_with_wrap(chk->rec.data.TSN_seq,
4852                     cumulative_tsn_p1, MAX_TSN)) {
4853                         /* Yep it is above cum-ack */
4854                         cnt++;
4855                         tsn = chk->rec.data.TSN_seq;
4856                         if (tsn >= asoc->mapping_array_base_tsn) {
4857                                 gap  = tsn - asoc->mapping_array_base_tsn;
4858                         } else {
4859                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
4860                                     tsn + 1;
4861                         }
4862                         asoc->size_on_reasm_queue -= chk->send_size;
4863                         asoc->cnt_on_reasm_queue--;
4864                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
4865                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4866                         if (chk->data) {
4867                                 sctp_m_freem(chk->data);
4868                                 chk->data = NULL;
4869                         }
4870                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4871                         sctppcbinfo.ipi_count_chunk--;
4872                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4873                                 panic("Chunk count is negative");
4874                         }
4875                         sctppcbinfo.ipi_gencnt_chunk++;
4876                 }
4877                 chk = nchk;
4878         }
4879         /* Ok that was fun, now we will drain all the inbound streams? */
4880         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
4881                 chk = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
4882                 while (chk) {
4883                         nchk = TAILQ_NEXT(chk, sctp_next);
4884                         if (compare_with_wrap(chk->rec.data.TSN_seq,
4885                             cumulative_tsn_p1, MAX_TSN)) {
4886                                 /* Yep it is above cum-ack */
4887                                 cnt++;
4888                                 tsn = chk->rec.data.TSN_seq;
4889                                 if (tsn >= asoc->mapping_array_base_tsn) {
4890                                         gap = tsn -
4891                                             asoc->mapping_array_base_tsn;
4892                                 } else {
4893                                         gap = (MAX_TSN -
4894                                             asoc->mapping_array_base_tsn) +
4895                                             tsn + 1;
4896                                 }
4897                                 asoc->size_on_all_streams -= chk->send_size;
4898                                 asoc->cnt_on_all_streams--;
4899
4900                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
4901                                     gap);
4902                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
4903                                     chk, sctp_next);
4904                                 if (chk->data) {
4905                                         sctp_m_freem(chk->data);
4906                                         chk->data = NULL;
4907                                 }
4908                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4909                                 sctppcbinfo.ipi_count_chunk--;
4910                                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4911                                         panic("Chunk count is negative");
4912                                 }
4913                                 sctppcbinfo.ipi_gencnt_chunk++;
4914                         }
4915                         chk = nchk;
4916                 }
4917         }
4918         /*
4919          * Question, should we go through the delivery queue?
4920          * The only reason things are on here is the app not reading OR a
4921          * p-d-api up. An attacker COULD send enough in to initiate the
4922          * PD-API and then send a bunch of stuff to other streams... these
4923          * would wind up on the delivery queue.. and then we would not get
4924          * to them. But in order to do this I then have to back-track and
4925          * un-deliver sequence numbers in streams.. el-yucko. I think for
4926          * now we will NOT look at the delivery queue and leave it to be
4927          * something to consider later. An alternative would be to abort
4928          * the P-D-API with a notification and then deliver the data....
4929          * Or another method might be to keep track of how many times the
4930          * situation occurs and if we see a possible attack underway just
4931          * abort the association.
4932          */
4933 #ifdef SCTP_DEBUG
4934         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
4935                 if (cnt) {
4936                         printf("Freed %d chunks from reneg harvest\n", cnt);
4937                 }
4938         }
4939 #endif /* SCTP_DEBUG */
4940
4941         /*
4942          * Another issue, in un-setting the TSN's in the mapping array we
4943          * DID NOT adjust the higest_tsn marker.  This will cause one of
4944          * two things to occur. It may cause us to do extra work in checking
4945          * for our mapping array movement. More importantly it may cause us
4946          * to SACK every datagram. This may not be a bad thing though since
4947          * we will recover once we get our cum-ack above and all this stuff
4948          * we dumped recovered.
4949          */
4950 }
4951
4952 void
4953 sctp_drain()
4954 {
4955         /*
4956          * We must walk the PCB lists for ALL associations here. The system
4957          * is LOW on MBUF's and needs help. This is where reneging will
4958          * occur. We really hope this does NOT happen!
4959          */
4960         struct sctp_inpcb *inp;
4961         struct sctp_tcb *stcb;
4962
4963         SCTP_INP_INFO_RLOCK();
4964         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
4965                 /* For each endpoint */
4966                 SCTP_INP_RLOCK(inp);
4967                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4968                         /* For each association */
4969                         SCTP_TCB_LOCK(stcb);
4970                         sctp_drain_mbufs(inp, stcb);
4971                         SCTP_TCB_UNLOCK(stcb);
4972                 }
4973                 SCTP_INP_RUNLOCK(inp);
4974         }
4975         SCTP_INP_INFO_RUNLOCK();
4976 }
4977
4978 int
4979 sctp_add_to_socket_q(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4980 {
4981         struct sctp_socket_q_list *sq;
4982
4983         /* write lock on INP assumed */
4984         if ((inp == NULL) || (stcb == NULL)) {
4985                 /* I am paranoid */
4986                 return (0);
4987         }
4988         sq = (struct sctp_socket_q_list *)SCTP_ZONE_GET(
4989             sctppcbinfo.ipi_zone_sockq);
4990         if (sq == NULL) {
4991                 /* out of sq structs */
4992                 return (0);
4993         }
4994         sctppcbinfo.ipi_count_sockq++;
4995         sctppcbinfo.ipi_gencnt_sockq++;
4996         if (stcb)
4997                 stcb->asoc.cnt_msg_on_sb++;
4998         sq->tcb = stcb;
4999         TAILQ_INSERT_TAIL(&inp->sctp_queue_list, sq, next_sq);
5000         return (1);
5001 }
5002
5003
5004 struct sctp_tcb *
5005 sctp_remove_from_socket_q(struct sctp_inpcb *inp)
5006 {
5007         struct sctp_tcb *stcb = NULL;
5008         struct sctp_socket_q_list *sq;
5009
5010         /* W-Lock on INP assumed held */
5011         sq = TAILQ_FIRST(&inp->sctp_queue_list);
5012         if (sq == NULL)
5013                 return (NULL);
5014
5015         stcb = sq->tcb;
5016         TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
5017         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
5018         sctppcbinfo.ipi_count_sockq--;
5019         sctppcbinfo.ipi_gencnt_sockq++;
5020         if (stcb) {
5021                 stcb->asoc.cnt_msg_on_sb--;
5022         }
5023         return (stcb);
5024 }
5025
5026 int
5027 sctp_initiate_iterator(asoc_func af, uint32_t pcb_state, uint32_t asoc_state,
5028                        void *argp, uint32_t argi, end_func ef,
5029                        struct sctp_inpcb *s_inp)
5030 {
5031         struct sctp_iterator *it=NULL;
5032
5033         if (af == NULL) {
5034                 return (-1);
5035         }
5036         MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), M_PCB,
5037                M_WAITOK);
5038         if (it == NULL) {
5039                 return (ENOMEM);
5040         }
5041         memset(it, 0, sizeof(*it));
5042         it->function_toapply = af;
5043         it->function_atend = ef;
5044         it->pointer = argp;
5045         it->val = argi;
5046         it->pcb_flags = pcb_state;
5047         it->asoc_state = asoc_state;
5048         if (s_inp) {
5049                 it->inp = s_inp;
5050                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5051         } else {
5052                 SCTP_INP_INFO_RLOCK();
5053                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5054                 SCTP_INP_INFO_RUNLOCK();
5055                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5056
5057         }
5058         /* Init the timer */
5059 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
5060         callout_init(&it->tmr.timer, 0);
5061 #else
5062         callout_init(&it->tmr.timer);
5063 #endif
5064         /* add to the list of all iterators */
5065         SCTP_INP_INFO_WLOCK();
5066         LIST_INSERT_HEAD(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5067         SCTP_INP_INFO_WUNLOCK();
5068         crit_enter();
5069         sctp_iterator_timer(it);
5070         crit_exit();
5071         return (0);
5072 }
5073
5074
5075 /*
5076  * Callout/Timer routines for OS that doesn't have them
5077  */
5078 #ifdef _SCTP_NEEDS_CALLOUT_
5079 #ifndef __APPLE__
5080 extern int ticks;
5081 #endif
5082
5083 void
5084 callout_init(struct callout *c)
5085 {
5086         bzero(c, sizeof(*c));
5087 }
5088
5089 void
5090 callout_reset(struct callout *c, int to_ticks, void (*ftn)(void *), void *arg)
5091 {
5092         crit_enter();
5093         if (c->c_flags & CALLOUT_PENDING)
5094                 callout_stop(c);
5095
5096         /*
5097          * We could spl down here and back up at the TAILQ_INSERT_TAIL,
5098          * but there's no point since doing this setup doesn't take much
5099          * time.
5100          */
5101         if (to_ticks <= 0)
5102                 to_ticks = 1;
5103
5104         c->c_arg = arg;
5105         c->c_flags = (CALLOUT_ACTIVE | CALLOUT_PENDING);
5106         c->c_func = ftn;
5107 #ifdef __APPLE__
5108         c->c_time = to_ticks;   /* just store the requested timeout */
5109         timeout(ftn, arg, to_ticks);
5110 #else
5111         c->c_time = ticks + to_ticks;
5112         TAILQ_INSERT_TAIL(&sctppcbinfo.callqueue, c, tqe);
5113 #endif
5114         crit_exit();
5115 }
5116
5117 int
5118 callout_stop(struct callout *c)
5119 {
5120         crit_enter();
5121         /*
5122          * Don't attempt to delete a callout that's not on the queue.
5123          */
5124         if (!(c->c_flags & CALLOUT_PENDING)) {
5125                 c->c_flags &= ~CALLOUT_ACTIVE;
5126                 crit_exit();
5127                 return (0);
5128         }
5129         c->c_flags &= ~(CALLOUT_ACTIVE | CALLOUT_PENDING| CALLOUT_FIRED);
5130 #ifdef __APPLE__
5131 /*      thread_call_cancel(c->c_call); */
5132         untimeout(c->c_func, c->c_arg);
5133 #else
5134         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5135         c->c_func = NULL;
5136 #endif
5137         crit_exit();
5138         return (1);
5139 }
5140
5141 #if !defined(__APPLE__)
5142 void
5143 sctp_fasttim(void)
5144 {
5145         struct callout *c, *n;
5146         struct calloutlist locallist;
5147         int inited = 0;
5148
5149         crit_enter();
5150         /* run through and subtract and mark all callouts */
5151         c = TAILQ_FIRST(&sctppcbinfo.callqueue);
5152         while (c) {
5153                 n = TAILQ_NEXT(c, tqe);
5154                 if (c->c_time <= ticks) {
5155                         c->c_flags |= CALLOUT_FIRED;
5156                         c->c_time = 0;
5157                         TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5158                         if (inited == 0) {
5159                                 TAILQ_INIT(&locallist);
5160                                 inited = 1;
5161                         }
5162                         /* move off of main list */
5163                         TAILQ_INSERT_TAIL(&locallist, c, tqe);
5164                 }
5165                 c = n;
5166         }
5167         /* Now all the ones on the locallist must be called */
5168         if (inited) {
5169                 c = TAILQ_FIRST(&locallist);
5170                 while (c) {
5171                         /* remove it */
5172                         TAILQ_REMOVE(&locallist, c, tqe);
5173                         /* now validate that it did not get canceled */
5174                         if (c->c_flags & CALLOUT_FIRED) {
5175                                 c->c_flags &= ~CALLOUT_PENDING;
5176                                 crit_exit();
5177                                 (*c->c_func)(c->c_arg);
5178                                 crit_enter();
5179                         }
5180                         c = TAILQ_FIRST(&locallist);
5181                 }
5182         }
5183         crit_exit();
5184 }
5185 #endif
5186 #endif /* _SCTP_NEEDS_CALLOUT_ */