sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2006, Cisco Systems, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * a) Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  *
  10  * b) Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *   the documentation and/or other materials provided with the distribution.
  13  *
  14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  28  * THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include "opt_ipsec.h"
  37 #include "opt_compat.h"
  38 #include "opt_inet6.h"
  39 #include "opt_inet.h"
  40 #include "opt_sctp.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/malloc.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/domain.h>
  47 #include <sys/protosw.h>
  48 #include <sys/socket.h>
  49 #include <sys/socketvar.h>
  50 #include <sys/proc.h>
  51 #include <sys/kernel.h>
  52 #include <sys/sysctl.h>
  53
  54 #include <sys/callout.h>
  55
  56 #include <sys/limits.h>
  57 #include <machine/cpu.h>
  58
  59 #include <net/if.h>
  60 #include <net/if_types.h>
  61 #include <net/route.h>
  62 #include <netinet/in.h>
  63 #include <netinet/in_systm.h>
  64 #include <netinet/ip.h>
  65 #include <netinet/in_pcb.h>
  66 #include <netinet/in_var.h>
  67 #include <netinet/ip_var.h>
  68
  69 #ifdef INET6
  70 #include <netinet/ip6.h>
  71 #include <netinet6/ip6_var.h>
  72 #include <netinet6/scope6_var.h>
  73 #include <netinet6/in6_pcb.h>
  74 #endif                          /* INET6 */
  75
  76 #ifdef IPSEC
  77 #include <netinet6/ipsec.h>
  78 #include <netkey/key.h>
  79 #endif                          /* IPSEC */
  80
  81 #include <netinet/sctp_os.h>
  82 #include <netinet/sctp_var.h>
  83 #include <netinet/sctp_pcb.h>
  84 #include <netinet/sctputil.h>
  85 #include <netinet/sctp.h>
  86 #include <netinet/sctp_header.h>
  87 #include <netinet/sctp_asconf.h>
  88 #include <netinet/sctp_output.h>
  89 #include <netinet/sctp_timer.h>
  90
  91
  92 #ifdef SCTP_DEBUG
  93 uint32_t sctp_debug_on = 0;
  94
  95 #endif                          /* SCTP_DEBUG */
  96
  97
  98 extern int sctp_pcbtblsize;
  99 extern int sctp_hashtblsize;
 100 extern int sctp_chunkscale;
 101
 102 struct sctp_epinfo sctppcbinfo;
 103
 104 /* FIX: we don't handle multiple link local scopes */
 105 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
 106 int
 107 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
 108 {
 109         struct in6_addr tmp_a, tmp_b;
 110
 111         /* use a copy of a and b */
 112         tmp_a = *a;
 113         tmp_b = *b;
 114         in6_clearscope(&tmp_a);
 115         in6_clearscope(&tmp_b);
 116         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
 117 }
 118
 119
 120 void
 121 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
 122 {
 123         /*
 124          * We really don't need to lock this, but I will just because it
 125          * does not hurt.
 126          */
 127         SCTP_INP_INFO_RLOCK();
 128         spcb->ep_count = sctppcbinfo.ipi_count_ep;
 129         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
 130         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
 131         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
 132         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
 133         spcb->readq_count = sctppcbinfo.ipi_count_readq;
 134         spcb->stream_oque = sctppcbinfo.ipi_count_strmoq;
 135         spcb->free_chunks = sctppcbinfo.ipi_free_chunks;
 136
 137         SCTP_INP_INFO_RUNLOCK();
 138 }
 139
 140
 141 /*
 142  * Notes on locks for FreeBSD 5 and up. All association lookups that have a
 143  * definte ep, the INP structure is assumed to be locked for reading. If we
 144  * need to go find the INP (ususally when a **inp is passed) then we must
 145  * lock the INFO structure first and if needed lock the INP too. Note that if
 146  * we lock it we must
 147  *
 148  */
 149
 150
 151 /*
 152  * Given a endpoint, look and find in its association list any association
 153  * with the "to" address given. This can be a "from" address, too, for
 154  * inbound packets. For outbound packets it is a true "to" address.
 155  */
 156
 157 static struct sctp_tcb *
 158 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 159     struct sockaddr *to, struct sctp_nets **netp)
 160 {
 161         /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
 162
 163         /*
 164          * Note for this module care must be taken when observing what to is
 165          * for. In most of the rest of the code the TO field represents my
 166          * peer and the FROM field represents my address. For this module it
 167          * is reversed of that.
 168          */
 169         /*
 170          * If we support the TCP model, then we must now dig through to see
 171          * if we can find our endpoint in the list of tcp ep's.
 172          */
 173         uint16_t lport, rport;
 174         struct sctppcbhead *ephead;
 175         struct sctp_inpcb *inp;
 176         struct sctp_laddr *laddr;
 177         struct sctp_tcb *stcb;
 178         struct sctp_nets *net;
 179
 180         if ((to == NULL) || (from == NULL)) {
 181                 return (NULL);
 182         }
 183         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 184                 lport = ((struct sockaddr_in *)to)->sin_port;
 185                 rport = ((struct sockaddr_in *)from)->sin_port;
 186         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 187                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 188                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 189         } else {
 190                 return NULL;
 191         }
 192         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
 193             (lport + rport), sctppcbinfo.hashtcpmark)];
 194         /*
 195          * Ok now for each of the guys in this bucket we must look and see:
 196          * - Does the remote port match. - Does there single association's
 197          * addresses match this address (to). If so we update p_ep to point
 198          * to this ep and return the tcb from it.
 199          */
 200         LIST_FOREACH(inp, ephead, sctp_hash) {
 201                 if (lport != inp->sctp_lport) {
 202                         continue;
 203                 }
 204                 SCTP_INP_RLOCK(inp);
 205                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 206                         SCTP_INP_RUNLOCK(inp);
 207                         continue;
 208                 }
 209                 /* check to see if the ep has one of the addresses */
 210                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 211                         /* We are NOT bound all, so look further */
 212                         int match = 0;
 213
 214                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 215
 216                                 if (laddr->ifa == NULL) {
 217 #ifdef SCTP_DEBUG
 218                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 219                                                 printf("An ounce of prevention is worth a pound of cure\n");
 220                                         }
 221 #endif
 222                                         continue;
 223                                 }
 224                                 if (laddr->ifa->ifa_addr == NULL) {
 225 #ifdef SCTP_DEBUG
 226                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 227                                                 printf("ifa with a NULL address\n");
 228                                         }
 229 #endif
 230                                         continue;
 231                                 }
 232                                 if (laddr->ifa->ifa_addr->sa_family ==
 233                                     to->sa_family) {
 234                                         /* see if it matches */
 235                                         struct sockaddr_in *intf_addr, *sin;
 236
 237                                         intf_addr = (struct sockaddr_in *)
 238                                             laddr->ifa->ifa_addr;
 239                                         sin = (struct sockaddr_in *)to;
 240                                         if (from->sa_family == AF_INET) {
 241                                                 if (sin->sin_addr.s_addr ==
 242                                                     intf_addr->sin_addr.s_addr) {
 243                                                         match = 1;
 244                                                         break;
 245                                                 }
 246                                         } else {
 247                                                 struct sockaddr_in6 *intf_addr6;
 248                                                 struct sockaddr_in6 *sin6;
 249
 250                                                 sin6 = (struct sockaddr_in6 *)
 251                                                     to;
 252                                                 intf_addr6 = (struct sockaddr_in6 *)
 253                                                     laddr->ifa->ifa_addr;
 254
 255                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 256                                                     &intf_addr6->sin6_addr)) {
 257                                                         match = 1;
 258                                                         break;
 259                                                 }
 260                                         }
 261                                 }
 262                         }
 263                         if (match == 0) {
 264                                 /* This endpoint does not have this address */
 265                                 SCTP_INP_RUNLOCK(inp);
 266                                 continue;
 267                         }
 268                 }
 269                 /*
 270                  * Ok if we hit here the ep has the address, does it hold
 271                  * the tcb?
 272                  */
 273
 274                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 275                 if (stcb == NULL) {
 276                         SCTP_INP_RUNLOCK(inp);
 277                         continue;
 278                 }
 279                 SCTP_TCB_LOCK(stcb);
 280                 if (stcb->rport != rport) {
 281                         /* remote port does not match. */
 282                         SCTP_TCB_UNLOCK(stcb);
 283                         SCTP_INP_RUNLOCK(inp);
 284                         continue;
 285                 }
 286                 /* Does this TCB have a matching address? */
 287                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 288
 289                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 290                                 /* not the same family, can't be a match */
 291                                 continue;
 292                         }
 293                         if (from->sa_family == AF_INET) {
 294                                 struct sockaddr_in *sin, *rsin;
 295
 296                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
 297                                 rsin = (struct sockaddr_in *)from;
 298                                 if (sin->sin_addr.s_addr ==
 299                                     rsin->sin_addr.s_addr) {
 300                                         /* found it */
 301                                         if (netp != NULL) {
 302                                                 *netp = net;
 303                                         }
 304                                         /* Update the endpoint pointer */
 305                                         *inp_p = inp;
 306                                         SCTP_INP_RUNLOCK(inp);
 307                                         return (stcb);
 308                                 }
 309                         } else {
 310                                 struct sockaddr_in6 *sin6, *rsin6;
 311
 312                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 313                                 rsin6 = (struct sockaddr_in6 *)from;
 314                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 315                                     &rsin6->sin6_addr)) {
 316                                         /* found it */
 317                                         if (netp != NULL) {
 318                                                 *netp = net;
 319                                         }
 320                                         /* Update the endpoint pointer */
 321                                         *inp_p = inp;
 322                                         SCTP_INP_RUNLOCK(inp);
 323                                         return (stcb);
 324                                 }
 325                         }
 326                 }
 327                 SCTP_TCB_UNLOCK(stcb);
 328                 SCTP_INP_RUNLOCK(inp);
 329         }
 330         return (NULL);
 331 }
 332
 333 /*
 334  * rules for use
 335  *
 336  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
 337  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
 338  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
 339  * NULL.
 340  */
 341
 342 struct sctp_tcb *
 343 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 344     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 345 {
 346         struct sctpasochead *head;
 347         struct sctp_inpcb *inp;
 348         struct sctp_tcb *stcb;
 349         struct sctp_nets *net;
 350         uint16_t rport;
 351
 352         inp = *inp_p;
 353         if (remote->sa_family == AF_INET) {
 354                 rport = (((struct sockaddr_in *)remote)->sin_port);
 355         } else if (remote->sa_family == AF_INET6) {
 356                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 357         } else {
 358                 return (NULL);
 359         }
 360         if (locked_tcb) {
 361                 /*
 362                  * UN-lock so we can do proper locking here this occurs when
 363                  * called from load_addresses_from_init.
 364                  */
 365                 SCTP_TCB_UNLOCK(locked_tcb);
 366         }
 367         SCTP_INP_INFO_RLOCK();
 368         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 369                 /*
 370                  * Now either this guy is our listener or it's the
 371                  * connector. If it is the one that issued the connect, then
 372                  * it's only chance is to be the first TCB in the list. If
 373                  * it is the acceptor, then do the special_lookup to hash
 374                  * and find the real inp.
 375                  */
 376                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
 377                         /* to is peer addr, from is my addr */
 378                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 379                             netp);
 380                         if ((stcb != NULL) && (locked_tcb == NULL)) {
 381                                 /* we have a locked tcb, lower refcount */
 382                                 SCTP_INP_WLOCK(inp);
 383                                 SCTP_INP_DECR_REF(inp);
 384                                 SCTP_INP_WUNLOCK(inp);
 385                         }
 386                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
 387                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 388                                 SCTP_TCB_LOCK(locked_tcb);
 389                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 390                         }
 391                         SCTP_INP_INFO_RUNLOCK();
 392                         return (stcb);
 393                 } else {
 394                         SCTP_INP_WLOCK(inp);
 395                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 396                                 goto null_return;
 397                         }
 398                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 399                         if (stcb == NULL) {
 400                                 goto null_return;
 401                         }
 402                         SCTP_TCB_LOCK(stcb);
 403                         if (stcb->rport != rport) {
 404                                 /* remote port does not match. */
 405                                 SCTP_TCB_UNLOCK(stcb);
 406                                 goto null_return;
 407                         }
 408                         /* now look at the list of remote addresses */
 409                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 410 #ifdef INVARIENTS
 411                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 412                                         panic("Corrupt net list");
 413                                 }
 414 #endif
 415                                 if (net->ro._l_addr.sa.sa_family !=
 416                                     remote->sa_family) {
 417                                         /* not the same family */
 418                                         continue;
 419                                 }
 420                                 if (remote->sa_family == AF_INET) {
 421                                         struct sockaddr_in *sin, *rsin;
 422
 423                                         sin = (struct sockaddr_in *)
 424                                             &net->ro._l_addr;
 425                                         rsin = (struct sockaddr_in *)remote;
 426                                         if (sin->sin_addr.s_addr ==
 427                                             rsin->sin_addr.s_addr) {
 428                                                 /* found it */
 429                                                 if (netp != NULL) {
 430                                                         *netp = net;
 431                                                 }
 432                                                 if (locked_tcb == NULL) {
 433                                                         SCTP_INP_DECR_REF(inp);
 434                                                 } else if (locked_tcb != stcb) {
 435                                                         SCTP_TCB_LOCK(locked_tcb);
 436                                                 }
 437                                                 SCTP_INP_WUNLOCK(inp);
 438                                                 SCTP_INP_INFO_RUNLOCK();
 439                                                 return (stcb);
 440                                         }
 441                                 } else if (remote->sa_family == AF_INET6) {
 442                                         struct sockaddr_in6 *sin6, *rsin6;
 443
 444                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 445                                         rsin6 = (struct sockaddr_in6 *)remote;
 446                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 447                                             &rsin6->sin6_addr)) {
 448                                                 /* found it */
 449                                                 if (netp != NULL) {
 450                                                         *netp = net;
 451                                                 }
 452                                                 if (locked_tcb == NULL) {
 453                                                         SCTP_INP_DECR_REF(inp);
 454                                                 } else if (locked_tcb != stcb) {
 455                                                         SCTP_TCB_LOCK(locked_tcb);
 456                                                 }
 457                                                 SCTP_INP_WUNLOCK(inp);
 458                                                 SCTP_INP_INFO_RUNLOCK();
 459                                                 return (stcb);
 460                                         }
 461                                 }
 462                         }
 463                         SCTP_TCB_UNLOCK(stcb);
 464                 }
 465         } else {
 466                 SCTP_INP_WLOCK(inp);
 467                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 468                         goto null_return;
 469                 }
 470                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 471                     inp->sctp_hashmark)];
 472                 if (head == NULL) {
 473                         goto null_return;
 474                 }
 475                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 476                         if (stcb->rport != rport) {
 477                                 /* remote port does not match */
 478                                 continue;
 479                         }
 480                         /* now look at the list of remote addresses */
 481                         SCTP_TCB_LOCK(stcb);
 482                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 483 #ifdef INVARIENTS
 484                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 485                                         panic("Corrupt net list");
 486                                 }
 487 #endif
 488                                 if (net->ro._l_addr.sa.sa_family !=
 489                                     remote->sa_family) {
 490                                         /* not the same family */
 491                                         continue;
 492                                 }
 493                                 if (remote->sa_family == AF_INET) {
 494                                         struct sockaddr_in *sin, *rsin;
 495
 496                                         sin = (struct sockaddr_in *)
 497                                             &net->ro._l_addr;
 498                                         rsin = (struct sockaddr_in *)remote;
 499                                         if (sin->sin_addr.s_addr ==
 500                                             rsin->sin_addr.s_addr) {
 501                                                 /* found it */
 502                                                 if (netp != NULL) {
 503                                                         *netp = net;
 504                                                 }
 505                                                 if (locked_tcb == NULL) {
 506                                                         SCTP_INP_DECR_REF(inp);
 507                                                 } else if (locked_tcb != stcb) {
 508                                                         SCTP_TCB_LOCK(locked_tcb);
 509                                                 }
 510                                                 SCTP_INP_WUNLOCK(inp);
 511                                                 SCTP_INP_INFO_RUNLOCK();
 512                                                 return (stcb);
 513                                         }
 514                                 } else if (remote->sa_family == AF_INET6) {
 515                                         struct sockaddr_in6 *sin6, *rsin6;
 516
 517                                         sin6 = (struct sockaddr_in6 *)
 518                                             &net->ro._l_addr;
 519                                         rsin6 = (struct sockaddr_in6 *)remote;
 520                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 521                                             &rsin6->sin6_addr)) {
 522                                                 /* found it */
 523                                                 if (netp != NULL) {
 524                                                         *netp = net;
 525                                                 }
 526                                                 if (locked_tcb == NULL) {
 527                                                         SCTP_INP_DECR_REF(inp);
 528                                                 } else if (locked_tcb != stcb) {
 529                                                         SCTP_TCB_LOCK(locked_tcb);
 530                                                 }
 531                                                 SCTP_INP_WUNLOCK(inp);
 532                                                 SCTP_INP_INFO_RUNLOCK();
 533                                                 return (stcb);
 534                                         }
 535                                 }
 536                         }
 537                         SCTP_TCB_UNLOCK(stcb);
 538                 }
 539         }
 540 null_return:
 541         /* clean up for returning null */
 542         if (locked_tcb) {
 543                 SCTP_TCB_LOCK(locked_tcb);
 544         }
 545         SCTP_INP_WUNLOCK(inp);
 546         SCTP_INP_INFO_RUNLOCK();
 547         /* not found */
 548         return (NULL);
 549 }
 550
 551 /*
 552  * Find an association for a specific endpoint using the association id given
 553  * out in the COMM_UP notification
 554  */
 555
 556 struct sctp_tcb *
 557 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 558 {
 559         /*
 560          * Use my the assoc_id to find a endpoint
 561          */
 562         struct sctpasochead *head;
 563         struct sctp_tcb *stcb;
 564         uint32_t id;
 565
 566         if (asoc_id == 0 || inp == NULL) {
 567                 return (NULL);
 568         }
 569         SCTP_INP_INFO_RLOCK();
 570         id = (uint32_t) asoc_id;
 571         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id,
 572             sctppcbinfo.hashasocmark)];
 573         if (head == NULL) {
 574                 /* invalid id TSNH */
 575                 SCTP_INP_INFO_RUNLOCK();
 576                 return (NULL);
 577         }
 578         LIST_FOREACH(stcb, head, sctp_asocs) {
 579                 SCTP_INP_RLOCK(stcb->sctp_ep);
 580                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 581                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 582                         SCTP_INP_INFO_RUNLOCK();
 583                         return (NULL);
 584                 }
 585                 if (stcb->asoc.assoc_id == id) {
 586                         /* candidate */
 587                         if (inp != stcb->sctp_ep) {
 588                                 /*
 589                                  * some other guy has the same id active (id
 590                                  * collision ??).
 591                                  */
 592                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 593                                 continue;
 594                         }
 595                         if (want_lock) {
 596                                 SCTP_TCB_LOCK(stcb);
 597                         }
 598                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 599                         SCTP_INP_INFO_RUNLOCK();
 600                         return (stcb);
 601                 }
 602                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 603         }
 604         /* Ok if we missed here, lets try the restart hash */
 605         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)];
 606         if (head == NULL) {
 607                 /* invalid id TSNH */
 608                 SCTP_INP_INFO_RUNLOCK();
 609                 return (NULL);
 610         }
 611         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
 612                 SCTP_INP_RLOCK(stcb->sctp_ep);
 613                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 614                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 615                         SCTP_INP_INFO_RUNLOCK();
 616                         return (NULL);
 617                 }
 618                 SCTP_TCB_LOCK(stcb);
 619                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 620                 if (stcb->asoc.assoc_id == id) {
 621                         /* candidate */
 622                         if (inp != stcb->sctp_ep) {
 623                                 /*
 624                                  * some other guy has the same id active (id
 625                                  * collision ??).
 626                                  */
 627                                 SCTP_TCB_UNLOCK(stcb);
 628                                 continue;
 629                         }
 630                         SCTP_INP_INFO_RUNLOCK();
 631                         return (stcb);
 632                 }
 633                 SCTP_TCB_UNLOCK(stcb);
 634         }
 635         SCTP_INP_INFO_RUNLOCK();
 636         return (NULL);
 637 }
 638
 639
 640 static struct sctp_inpcb *
 641 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 642     uint16_t lport)
 643 {
 644         struct sctp_inpcb *inp;
 645         struct sockaddr_in *sin;
 646         struct sockaddr_in6 *sin6;
 647         struct sctp_laddr *laddr;
 648
 649         /*
 650          * Endpoing probe expects that the INP_INFO is locked.
 651          */
 652         if (nam->sa_family == AF_INET) {
 653                 sin = (struct sockaddr_in *)nam;
 654                 sin6 = NULL;
 655         } else if (nam->sa_family == AF_INET6) {
 656                 sin6 = (struct sockaddr_in6 *)nam;
 657                 sin = NULL;
 658         } else {
 659                 /* unsupported family */
 660                 return (NULL);
 661         }
 662         if (head == NULL)
 663                 return (NULL);
 664         LIST_FOREACH(inp, head, sctp_hash) {
 665                 SCTP_INP_RLOCK(inp);
 666                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 667                         SCTP_INP_RUNLOCK(inp);
 668                         continue;
 669                 }
 670                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 671                     (inp->sctp_lport == lport)) {
 672                         /* got it */
 673                         if ((nam->sa_family == AF_INET) &&
 674                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 675                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
 676                             ) {
 677                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
 678                                 SCTP_INP_RUNLOCK(inp);
 679                                 continue;
 680                         }
 681                         /* A V6 address and the endpoint is NOT bound V6 */
 682                         if (nam->sa_family == AF_INET6 &&
 683                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 684                                 SCTP_INP_RUNLOCK(inp);
 685                                 continue;
 686                         }
 687                         SCTP_INP_RUNLOCK(inp);
 688                         return (inp);
 689                 }
 690                 SCTP_INP_RUNLOCK(inp);
 691         }
 692
 693         if ((nam->sa_family == AF_INET) &&
 694             (sin->sin_addr.s_addr == INADDR_ANY)) {
 695                 /* Can't hunt for one that has no address specified */
 696                 return (NULL);
 697         } else if ((nam->sa_family == AF_INET6) &&
 698             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
 699                 /* Can't hunt for one that has no address specified */
 700                 return (NULL);
 701         }
 702         /*
 703          * ok, not bound to all so see if we can find a EP bound to this
 704          * address.
 705          */
 706         LIST_FOREACH(inp, head, sctp_hash) {
 707                 SCTP_INP_RLOCK(inp);
 708                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 709                         SCTP_INP_RUNLOCK(inp);
 710                         continue;
 711                 }
 712                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 713                         SCTP_INP_RUNLOCK(inp);
 714                         continue;
 715                 }
 716                 /*
 717                  * Ok this could be a likely candidate, look at all of its
 718                  * addresses
 719                  */
 720                 if (inp->sctp_lport != lport) {
 721                         SCTP_INP_RUNLOCK(inp);
 722                         continue;
 723                 }
 724                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 725                         if (laddr->ifa == NULL) {
 726 #ifdef SCTP_DEBUG
 727                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 728                                         printf("An ounce of prevention is worth a pound of cure\n");
 729                                 }
 730 #endif
 731                                 continue;
 732                         }
 733 #ifdef SCTP_DEBUG
 734                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 735                                 printf("Ok laddr->ifa:%p is possible, ",
 736                                     laddr->ifa);
 737                         }
 738 #endif
 739                         if (laddr->ifa->ifa_addr == NULL) {
 740 #ifdef SCTP_DEBUG
 741                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 742                                         printf("Huh IFA as an ifa_addr=NULL, ");
 743                                 }
 744 #endif
 745                                 continue;
 746                         }
 747                         if (laddr->ifa->ifa_addr->sa_family == nam->sa_family) {
 748                                 /* possible, see if it matches */
 749                                 struct sockaddr_in *intf_addr;
 750
 751                                 intf_addr = (struct sockaddr_in *)
 752                                     laddr->ifa->ifa_addr;
 753                                 if (nam->sa_family == AF_INET) {
 754                                         if (sin->sin_addr.s_addr ==
 755                                             intf_addr->sin_addr.s_addr) {
 756                                                 SCTP_INP_RUNLOCK(inp);
 757                                                 return (inp);
 758                                         }
 759                                 } else if (nam->sa_family == AF_INET6) {
 760                                         struct sockaddr_in6 *intf_addr6;
 761
 762                                         intf_addr6 = (struct sockaddr_in6 *)
 763                                             laddr->ifa->ifa_addr;
 764                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 765                                             &intf_addr6->sin6_addr)) {
 766                                                 SCTP_INP_RUNLOCK(inp);
 767                                                 return (inp);
 768                                         }
 769                                 }
 770                         }
 771                 }
 772                 SCTP_INP_RUNLOCK(inp);
 773         }
 774         return (NULL);
 775 }
 776
 777
 778 struct sctp_inpcb *
 779 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock)
 780 {
 781         /*
 782          * First we check the hash table to see if someone has this port
 783          * bound with just the port.
 784          */
 785         struct sctp_inpcb *inp;
 786         struct sctppcbhead *head;
 787         struct sockaddr_in *sin;
 788         struct sockaddr_in6 *sin6;
 789         int lport;
 790
 791         if (nam->sa_family == AF_INET) {
 792                 sin = (struct sockaddr_in *)nam;
 793                 lport = ((struct sockaddr_in *)nam)->sin_port;
 794         } else if (nam->sa_family == AF_INET6) {
 795                 sin6 = (struct sockaddr_in6 *)nam;
 796                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
 797         } else {
 798                 /* unsupported family */
 799                 return (NULL);
 800         }
 801         /*
 802          * I could cheat here and just cast to one of the types but we will
 803          * do it right. It also provides the check against an Unsupported
 804          * type too.
 805          */
 806         /* Find the head of the ALLADDR chain */
 807         if (have_lock == 0) {
 808                 SCTP_INP_INFO_RLOCK();
 809
 810         }
 811         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
 812             sctppcbinfo.hashmark)];
 813         inp = sctp_endpoint_probe(nam, head, lport);
 814
 815         /*
 816          * If the TCP model exists it could be that the main listening
 817          * endpoint is gone but there exists a connected socket for this guy
 818          * yet. If so we can return the first one that we find. This may NOT
 819          * be the correct one but the sctp_findassociation_ep_addr has
 820          * further code to look at all TCP models.
 821          */
 822         if (inp == NULL && find_tcp_pool) {
 823                 unsigned int i;
 824
 825                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
 826                         /*
 827                          * This is real gross, but we do NOT have a remote
 828                          * port at this point depending on who is calling.
 829                          * We must therefore look for ANY one that matches
 830                          * our local port :/
 831                          */
 832                         head = &sctppcbinfo.sctp_tcpephash[i];
 833                         if (LIST_FIRST(head)) {
 834                                 inp = sctp_endpoint_probe(nam, head, lport);
 835                                 if (inp) {
 836                                         /* Found one */
 837                                         break;
 838                                 }
 839                         }
 840                 }
 841         }
 842         if (inp) {
 843                 SCTP_INP_INCR_REF(inp);
 844         }
 845         if (have_lock == 0) {
 846                 SCTP_INP_INFO_RUNLOCK();
 847         }
 848         return (inp);
 849 }
 850
 851 /*
 852  * Find an association for an endpoint with the pointer to whom you want to
 853  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
 854  * need to change the *to to some other struct like a mbuf...
 855  */
 856 struct sctp_tcb *
 857 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
 858     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
 859 {
 860         struct sctp_inpcb *inp;
 861         struct sctp_tcb *retval;
 862
 863         SCTP_INP_INFO_RLOCK();
 864         if (find_tcp_pool) {
 865                 if (inp_p != NULL) {
 866                         retval = sctp_tcb_special_locate(inp_p, from, to, netp);
 867                 } else {
 868                         retval = sctp_tcb_special_locate(&inp, from, to, netp);
 869                 }
 870                 if (retval != NULL) {
 871                         SCTP_INP_INFO_RUNLOCK();
 872                         return (retval);
 873                 }
 874         }
 875         inp = sctp_pcb_findep(to, 0, 1);
 876         if (inp_p != NULL) {
 877                 *inp_p = inp;
 878         }
 879         SCTP_INP_INFO_RUNLOCK();
 880
 881         if (inp == NULL) {
 882                 return (NULL);
 883         }
 884         /*
 885          * ok, we have an endpoint, now lets find the assoc for it (if any)
 886          * we now place the source address or from in the to of the find
 887          * endpoint call. Since in reality this chain is used from the
 888          * inbound packet side.
 889          */
 890         if (inp_p != NULL) {
 891                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL);
 892         } else {
 893                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, NULL);
 894         }
 895         return retval;
 896 }
 897
 898
 899 /*
 900  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
 901  * find all addresses that the sender has specified in any address list. Each
 902  * address will be used to lookup the TCB and see if one exits.
 903  */
 904 static struct sctp_tcb *
 905 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
 906     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
 907     struct sockaddr *dest)
 908 {
 909         struct sockaddr_in sin4;
 910         struct sockaddr_in6 sin6;
 911         struct sctp_paramhdr *phdr, parm_buf;
 912         struct sctp_tcb *retval;
 913         uint32_t ptype, plen;
 914
 915         memset(&sin4, 0, sizeof(sin4));
 916         memset(&sin6, 0, sizeof(sin6));
 917         sin4.sin_len = sizeof(sin4);
 918         sin4.sin_family = AF_INET;
 919         sin4.sin_port = sh->src_port;
 920         sin6.sin6_len = sizeof(sin6);
 921         sin6.sin6_family = AF_INET6;
 922         sin6.sin6_port = sh->src_port;
 923
 924         retval = NULL;
 925         offset += sizeof(struct sctp_init_chunk);
 926
 927         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 928         while (phdr != NULL) {
 929                 /* now we must see if we want the parameter */
 930                 ptype = ntohs(phdr->param_type);
 931                 plen = ntohs(phdr->param_length);
 932                 if (plen == 0) {
 933                         break;
 934                 }
 935                 if (ptype == SCTP_IPV4_ADDRESS &&
 936                     plen == sizeof(struct sctp_ipv4addr_param)) {
 937                         /* Get the rest of the address */
 938                         struct sctp_ipv4addr_param ip4_parm, *p4;
 939
 940                         phdr = sctp_get_next_param(m, offset,
 941                             (struct sctp_paramhdr *)&ip4_parm, plen);
 942                         if (phdr == NULL) {
 943                                 return (NULL);
 944                         }
 945                         p4 = (struct sctp_ipv4addr_param *)phdr;
 946                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
 947                         /* look it up */
 948                         retval = sctp_findassociation_ep_addr(inp_p,
 949                             (struct sockaddr *)&sin4, netp, dest, NULL);
 950                         if (retval != NULL) {
 951                                 return (retval);
 952                         }
 953                 } else if (ptype == SCTP_IPV6_ADDRESS &&
 954                     plen == sizeof(struct sctp_ipv6addr_param)) {
 955                         /* Get the rest of the address */
 956                         struct sctp_ipv6addr_param ip6_parm, *p6;
 957
 958                         phdr = sctp_get_next_param(m, offset,
 959                             (struct sctp_paramhdr *)&ip6_parm, plen);
 960                         if (phdr == NULL) {
 961                                 return (NULL);
 962                         }
 963                         p6 = (struct sctp_ipv6addr_param *)phdr;
 964                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
 965                         /* look it up */
 966                         retval = sctp_findassociation_ep_addr(inp_p,
 967                             (struct sockaddr *)&sin6, netp, dest, NULL);
 968                         if (retval != NULL) {
 969                                 return (retval);
 970                         }
 971                 }
 972                 offset += SCTP_SIZE32(plen);
 973                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 974                     sizeof(parm_buf));
 975         }
 976         return (NULL);
 977 }
 978
 979
 980 static struct sctp_tcb *
 981 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
 982     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
 983     uint16_t lport, int skip_src_check)
 984 {
 985         /*
 986          * Use my vtag to hash. If we find it we then verify the source addr
 987          * is in the assoc. If all goes well we save a bit on rec of a
 988          * packet.
 989          */
 990         struct sctpasochead *head;
 991         struct sctp_nets *net;
 992         struct sctp_tcb *stcb;
 993
 994         *netp = NULL;
 995         *inp_p = NULL;
 996         SCTP_INP_INFO_RLOCK();
 997         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
 998             sctppcbinfo.hashasocmark)];
 999         if (head == NULL) {
1000                 /* invalid vtag */
1001                 SCTP_INP_INFO_RUNLOCK();
1002                 return (NULL);
1003         }
1004         LIST_FOREACH(stcb, head, sctp_asocs) {
1005                 SCTP_INP_RLOCK(stcb->sctp_ep);
1006                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1007                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1008                         SCTP_INP_INFO_RUNLOCK();
1009                         return (NULL);
1010                 }
1011                 SCTP_TCB_LOCK(stcb);
1012                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1013                 if (stcb->asoc.my_vtag == vtag) {
1014                         /* candidate */
1015                         if (stcb->rport != rport) {
1016                                 /*
1017                                  * we could remove this if vtags are unique
1018                                  * across the system.
1019                                  */
1020                                 SCTP_TCB_UNLOCK(stcb);
1021                                 continue;
1022                         }
1023                         if (stcb->sctp_ep->sctp_lport != lport) {
1024                                 /*
1025                                  * we could remove this if vtags are unique
1026                                  * across the system.
1027                                  */
1028                                 SCTP_TCB_UNLOCK(stcb);
1029                                 continue;
1030                         }
1031                         if (skip_src_check) {
1032                                 *netp = NULL;   /* unknown */
1033                                 *inp_p = stcb->sctp_ep;
1034                                 SCTP_INP_INFO_RUNLOCK();
1035                                 return (stcb);
1036                         }
1037                         net = sctp_findnet(stcb, from);
1038                         if (net) {
1039                                 /* yep its him. */
1040                                 *netp = net;
1041                                 SCTP_STAT_INCR(sctps_vtagexpress);
1042                                 *inp_p = stcb->sctp_ep;
1043                                 SCTP_INP_INFO_RUNLOCK();
1044                                 return (stcb);
1045                         } else {
1046                                 /*
1047                                  * not him, this should only happen in rare
1048                                  * cases so I peg it.
1049                                  */
1050                                 SCTP_STAT_INCR(sctps_vtagbogus);
1051                         }
1052                 }
1053                 SCTP_TCB_UNLOCK(stcb);
1054         }
1055         SCTP_INP_INFO_RUNLOCK();
1056         return (NULL);
1057 }
1058
1059 /*
1060  * Find an association with the pointer to the inbound IP packet. This can be
1061  * a IPv4 or IPv6 packet.
1062  */
1063 struct sctp_tcb *
1064 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1065     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1066     struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1067 {
1068         int find_tcp_pool;
1069         struct ip *iph;
1070         struct sctp_tcb *retval;
1071         struct sockaddr_storage to_store, from_store;
1072         struct sockaddr *to = (struct sockaddr *)&to_store;
1073         struct sockaddr *from = (struct sockaddr *)&from_store;
1074         struct sctp_inpcb *inp;
1075
1076
1077         iph = mtod(m, struct ip *);
1078         if (iph->ip_v == IPVERSION) {
1079                 /* its IPv4 */
1080                 struct sockaddr_in *from4;
1081
1082                 from4 = (struct sockaddr_in *)&from_store;
1083                 bzero(from4, sizeof(*from4));
1084                 from4->sin_family = AF_INET;
1085                 from4->sin_len = sizeof(struct sockaddr_in);
1086                 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1087                 from4->sin_port = sh->src_port;
1088         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1089                 /* its IPv6 */
1090                 struct ip6_hdr *ip6;
1091                 struct sockaddr_in6 *from6;
1092
1093                 ip6 = mtod(m, struct ip6_hdr *);
1094                 from6 = (struct sockaddr_in6 *)&from_store;
1095                 bzero(from6, sizeof(*from6));
1096                 from6->sin6_family = AF_INET6;
1097                 from6->sin6_len = sizeof(struct sockaddr_in6);
1098                 from6->sin6_addr = ip6->ip6_src;
1099                 from6->sin6_port = sh->src_port;
1100                 /* Get the scopes in properly to the sin6 addr's */
1101                 /* we probably don't need these operations */
1102                 (void)sa6_recoverscope(from6);
1103                 sa6_embedscope(from6, ip6_use_defzone);
1104         } else {
1105                 /* Currently not supported. */
1106                 return (NULL);
1107         }
1108         if (sh->v_tag) {
1109                 /* we only go down this path if vtag is non-zero */
1110                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1111                     inp_p, netp, sh->src_port, sh->dest_port, 0);
1112                 if (retval) {
1113                         return (retval);
1114                 }
1115         }
1116         if (iph->ip_v == IPVERSION) {
1117                 /* its IPv4 */
1118                 struct sockaddr_in *to4;
1119
1120                 to4 = (struct sockaddr_in *)&to_store;
1121                 bzero(to4, sizeof(*to4));
1122                 to4->sin_family = AF_INET;
1123                 to4->sin_len = sizeof(struct sockaddr_in);
1124                 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
1125                 to4->sin_port = sh->dest_port;
1126         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1127                 /* its IPv6 */
1128                 struct ip6_hdr *ip6;
1129                 struct sockaddr_in6 *to6;
1130
1131                 ip6 = mtod(m, struct ip6_hdr *);
1132                 to6 = (struct sockaddr_in6 *)&to_store;
1133                 bzero(to6, sizeof(*to6));
1134                 to6->sin6_family = AF_INET6;
1135                 to6->sin6_len = sizeof(struct sockaddr_in6);
1136                 to6->sin6_addr = ip6->ip6_dst;
1137                 to6->sin6_port = sh->dest_port;
1138                 /* Get the scopes in properly to the sin6 addr's */
1139                 /* we probably don't need these operations */
1140                 (void)sa6_recoverscope(to6);
1141                 sa6_embedscope(to6, ip6_use_defzone);
1142         }
1143         find_tcp_pool = 0;
1144         /*
1145          * FIX FIX?, I think we only need to look in the TCP pool if its an
1146          * INIT or COOKIE-ECHO, We really don't need to find it that way if
1147          * its a INIT-ACK or COOKIE_ACK since these in bot one-2-one and
1148          * one-2-N would be in the main pool anyway.
1149          */
1150         if ((ch->chunk_type != SCTP_INITIATION) &&
1151             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1152             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1153             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1154                 /* Other chunk types go to the tcp pool. */
1155                 find_tcp_pool = 1;
1156         }
1157         if (inp_p) {
1158                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1159                     find_tcp_pool);
1160                 inp = *inp_p;
1161         } else {
1162                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1163                     find_tcp_pool);
1164         }
1165 #ifdef SCTP_DEBUG
1166         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1167                 printf("retval:%p inp:%p\n", retval, inp);
1168         }
1169 #endif
1170         if (retval == NULL && inp) {
1171                 /* Found a EP but not this address */
1172                 if ((ch->chunk_type == SCTP_INITIATION) ||
1173                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1174                         /*
1175                          * special hook, we do NOT return linp or an
1176                          * association that is linked to an existing
1177                          * association that is under the TCP pool (i.e. no
1178                          * listener exists). The endpoint finding routine
1179                          * will always find a listner before examining the
1180                          * TCP pool.
1181                          */
1182                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1183                                 if (inp_p) {
1184                                         *inp_p = NULL;
1185                                 }
1186                                 return (NULL);
1187                         }
1188                         retval = sctp_findassociation_special_addr(m, iphlen,
1189                             offset, sh, &inp, netp, to);
1190                         if (inp_p != NULL) {
1191                                 *inp_p = inp;
1192                         }
1193                 }
1194         }
1195 #ifdef SCTP_DEBUG
1196         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1197                 printf("retval is %p\n", retval);
1198         }
1199 #endif
1200         return (retval);
1201 }
1202
1203 /*
1204  * lookup an association by an ASCONF lookup address.
1205  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
1206  */
1207 struct sctp_tcb *
1208 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
1209     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1210 {
1211         struct sctp_tcb *stcb;
1212         struct sockaddr_in *sin;
1213         struct sockaddr_in6 *sin6;
1214         struct sockaddr_storage local_store, remote_store;
1215         struct ip *iph;
1216         struct sctp_paramhdr parm_buf, *phdr;
1217         int ptype;
1218         int zero_address = 0;
1219
1220
1221         memset(&local_store, 0, sizeof(local_store));
1222         memset(&remote_store, 0, sizeof(remote_store));
1223
1224         /* First get the destination address setup too. */
1225         iph = mtod(m, struct ip *);
1226         if (iph->ip_v == IPVERSION) {
1227                 /* its IPv4 */
1228                 sin = (struct sockaddr_in *)&local_store;
1229                 sin->sin_family = AF_INET;
1230                 sin->sin_len = sizeof(*sin);
1231                 sin->sin_port = sh->dest_port;
1232                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
1233         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1234                 /* its IPv6 */
1235                 struct ip6_hdr *ip6;
1236
1237                 ip6 = mtod(m, struct ip6_hdr *);
1238                 sin6 = (struct sockaddr_in6 *)&local_store;
1239                 sin6->sin6_family = AF_INET6;
1240                 sin6->sin6_len = sizeof(*sin6);
1241                 sin6->sin6_port = sh->dest_port;
1242                 sin6->sin6_addr = ip6->ip6_dst;
1243         } else {
1244                 return NULL;
1245         }
1246
1247         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
1248             &parm_buf, sizeof(struct sctp_paramhdr));
1249         if (phdr == NULL) {
1250 #ifdef SCTP_DEBUG
1251                 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
1252                         printf("findassociation_ep_asconf: failed to get asconf lookup addr\n");
1253                 }
1254 #endif                          /* SCTP_DEBUG */
1255                 return NULL;
1256         }
1257         ptype = (int)((uint32_t) ntohs(phdr->param_type));
1258         /* get the correlation address */
1259         if (ptype == SCTP_IPV6_ADDRESS) {
1260                 /* ipv6 address param */
1261                 struct sctp_ipv6addr_param *p6, p6_buf;
1262
1263                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
1264                         return NULL;
1265                 }
1266                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
1267                     offset + sizeof(struct sctp_asconf_chunk),
1268                     &p6_buf.ph, sizeof(*p6));
1269                 if (p6 == NULL) {
1270 #ifdef SCTP_DEBUG
1271                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
1272                                 printf("findassociation_ep_asconf: failed to get asconf v6 lookup addr\n");
1273                         }
1274 #endif                          /* SCTP_DEBUG */
1275                         return (NULL);
1276                 }
1277                 sin6 = (struct sockaddr_in6 *)&remote_store;
1278                 sin6->sin6_family = AF_INET6;
1279                 sin6->sin6_len = sizeof(*sin6);
1280                 sin6->sin6_port = sh->src_port;
1281                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
1282                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1283                         zero_address = 1;
1284         } else if (ptype == SCTP_IPV4_ADDRESS) {
1285                 /* ipv4 address param */
1286                 struct sctp_ipv4addr_param *p4, p4_buf;
1287
1288                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
1289                         return NULL;
1290                 }
1291                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
1292                     offset + sizeof(struct sctp_asconf_chunk),
1293                     &p4_buf.ph, sizeof(*p4));
1294                 if (p4 == NULL) {
1295 #ifdef SCTP_DEBUG
1296                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
1297                                 printf("findassociation_ep_asconf: failed to get asconf v4 lookup addr\n");
1298                         }
1299 #endif                          /* SCTP_DEBUG */
1300                         return (NULL);
1301                 }
1302                 sin = (struct sockaddr_in *)&remote_store;
1303                 sin->sin_family = AF_INET;
1304                 sin->sin_len = sizeof(*sin);
1305                 sin->sin_port = sh->src_port;
1306                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
1307                 if (sin->sin_addr.s_addr == INADDR_ANY)
1308                         zero_address = 1;
1309         } else {
1310                 /* invalid address param type */
1311                 return NULL;
1312         }
1313
1314         if (zero_address) {
1315                 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p,
1316                     netp, sh->src_port, sh->dest_port, 1);
1317                 /*
1318                  * printf("findassociation_ep_asconf: zero lookup address
1319                  * finds stcb 0x%x\n", (uint32_t)stcb);
1320                  */
1321         } else {
1322                 stcb = sctp_findassociation_ep_addr(inp_p,
1323                     (struct sockaddr *)&remote_store, netp,
1324                     (struct sockaddr *)&local_store, NULL);
1325         }
1326         return (stcb);
1327 }
1328
1329
1330 extern int sctp_max_burst_default;
1331
1332 extern unsigned int sctp_delayed_sack_time_default;
1333 extern unsigned int sctp_heartbeat_interval_default;
1334 extern unsigned int sctp_pmtu_raise_time_default;
1335 extern unsigned int sctp_shutdown_guard_time_default;
1336 extern unsigned int sctp_secret_lifetime_default;
1337
1338 extern unsigned int sctp_rto_max_default;
1339 extern unsigned int sctp_rto_min_default;
1340 extern unsigned int sctp_rto_initial_default;
1341 extern unsigned int sctp_init_rto_max_default;
1342 extern unsigned int sctp_valid_cookie_life_default;
1343 extern unsigned int sctp_init_rtx_max_default;
1344 extern unsigned int sctp_assoc_rtx_max_default;
1345 extern unsigned int sctp_path_rtx_max_default;
1346 extern unsigned int sctp_nr_outgoing_streams_default;
1347
1348 /*
1349  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1350  * addresses. This way if we don't get a bind we by default pick a ephemeral
1351  * port with all addresses bound.
1352  */
1353 int
1354 sctp_inpcb_alloc(struct socket *so)
1355 {
1356         /*
1357          * we get called when a new endpoint starts up. We need to allocate
1358          * the sctp_inpcb structure from the zone and init it. Mark it as
1359          * unbound and find a port that we can use as an ephemeral with
1360          * INADDR_ANY. If the user binds later no problem we can then add in
1361          * the specific addresses. And setup the default parameters for the
1362          * EP.
1363          */
1364         int i, error;
1365         struct sctp_inpcb *inp;
1366
1367         struct sctp_pcb *m;
1368         struct timeval time;
1369         sctp_sharedkey_t *null_key;
1370
1371         error = 0;
1372
1373         SCTP_INP_INFO_WLOCK();
1374         inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
1375         if (inp == NULL) {
1376                 printf("Out of SCTP-INPCB structures - no resources\n");
1377                 SCTP_INP_INFO_WUNLOCK();
1378                 return (ENOBUFS);
1379         }
1380         /* zap it */
1381         bzero(inp, sizeof(*inp));
1382
1383         /* bump generations */
1384         /* setup socket pointers */
1385         inp->sctp_socket = so;
1386         inp->ip_inp.inp.inp_socket = so;
1387
1388         inp->partial_delivery_point = so->so_rcv.sb_hiwat >> SCTP_PARTIAL_DELIVERY_SHIFT;
1389         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1390
1391 #ifdef IPSEC
1392         {
1393                 struct inpcbpolicy *pcb_sp = NULL;
1394
1395                 error = ipsec_init_pcbpolicy(so, &pcb_sp);
1396                 /* Arrange to share the policy */
1397                 inp->ip_inp.inp.inp_sp = pcb_sp;
1398                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1399         }
1400         if (error != 0) {
1401                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1402                 SCTP_INP_INFO_WUNLOCK();
1403                 return error;
1404         }
1405 #endif                          /* IPSEC */
1406         SCTP_INCR_EP_COUNT();
1407         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1408         SCTP_INP_INFO_WUNLOCK();
1409
1410         so->so_pcb = (caddr_t)inp;
1411
1412         if ((so->so_type == SOCK_DGRAM) ||
1413             (so->so_type == SOCK_SEQPACKET)) {
1414                 /* UDP style socket */
1415                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1416                     SCTP_PCB_FLAGS_UNBOUND);
1417                 sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1418                 /* Be sure it is NON-BLOCKING IO for UDP */
1419                 /* so->so_state |= SS_NBIO; */
1420         } else if (so->so_type == SOCK_STREAM) {
1421                 /* TCP style socket */
1422                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1423                     SCTP_PCB_FLAGS_UNBOUND);
1424                 sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1425                 /* Be sure we have blocking IO by default */
1426                 so->so_state &= ~SS_NBIO;
1427         } else {
1428                 /*
1429                  * unsupported socket type (RAW, etc)- in case we missed it
1430                  * in protosw
1431                  */
1432                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1433                 return (EOPNOTSUPP);
1434         }
1435         inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1436             M_PCB,
1437             &inp->sctp_hashmark);
1438         if (inp->sctp_tcbhash == NULL) {
1439                 printf("Out of SCTP-INPCB->hashinit - no resources\n");
1440                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1441                 return (ENOBUFS);
1442         }
1443         SCTP_INP_INFO_WLOCK();
1444         SCTP_INP_LOCK_INIT(inp);
1445         SCTP_INP_READ_INIT(inp);
1446         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1447         /* lock the new ep */
1448         SCTP_INP_WLOCK(inp);
1449
1450         /* add it to the info area */
1451         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1452         SCTP_INP_INFO_WUNLOCK();
1453
1454         TAILQ_INIT(&inp->read_queue);
1455         LIST_INIT(&inp->sctp_addr_list);
1456         LIST_INIT(&inp->sctp_asoc_list);
1457
1458         /* Init the timer structure for signature change */
1459         callout_init(&inp->sctp_ep.signature_change.timer, 1);
1460         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1461
1462         /* now init the actual endpoint default data */
1463         m = &inp->sctp_ep;
1464
1465         /* setup the base timeout information */
1466         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
1467         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
1468         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1469         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default);
1470         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1471         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1472         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1473         /* all max/min max are in ms */
1474         m->sctp_maxrto = sctp_rto_max_default;
1475         m->sctp_minrto = sctp_rto_min_default;
1476         m->initial_rto = sctp_rto_initial_default;
1477         m->initial_init_rto_max = sctp_init_rto_max_default;
1478
1479         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1480
1481         m->max_init_times = sctp_init_rtx_max_default;
1482         m->max_send_times = sctp_assoc_rtx_max_default;
1483         m->def_net_failure = sctp_path_rtx_max_default;
1484         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1485         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1486         m->max_burst = sctp_max_burst_default;
1487         /* number of streams to pre-open on a association */
1488         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1489
1490         /* Add adaptation cookie */
1491         m->adaptation_layer_indicator = 0x504C5253;
1492
1493         /* seed random number generator */
1494         m->random_counter = 1;
1495         m->store_at = SCTP_SIGNATURE_SIZE;
1496         sctp_read_random(m->random_numbers, sizeof(m->random_numbers));
1497         sctp_fill_random_store(m);
1498
1499         /* Minimum cookie size */
1500         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1501             sizeof(struct sctp_state_cookie);
1502         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1503
1504         /* Setup the initial secret */
1505         SCTP_GETTIME_TIMEVAL(&time);
1506         m->time_of_secret_change = time.tv_sec;
1507
1508         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1509                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1510         }
1511         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1512
1513         /* How long is a cookie good for ? */
1514         m->def_cookie_life = sctp_valid_cookie_life_default;
1515
1516         /*
1517          * Initialize authentication parameters
1518          */
1519         m->local_hmacs = sctp_default_supported_hmaclist();
1520         m->local_auth_chunks = sctp_alloc_chunklist();
1521         sctp_auth_set_default_chunks(m->local_auth_chunks);
1522         LIST_INIT(&m->shared_keys);
1523         /* add default NULL key as key id 0 */
1524         null_key = sctp_alloc_sharedkey();
1525         sctp_insert_sharedkey(&m->shared_keys, null_key);
1526         SCTP_INP_WUNLOCK(inp);
1527 #ifdef SCTP_LOG_CLOSING
1528         sctp_log_closing(inp, NULL, 12);
1529 #endif
1530         return (error);
1531 }
1532
1533
1534 void
1535 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1536     struct sctp_tcb *stcb)
1537 {
1538         struct sctp_nets *net;
1539         uint16_t lport, rport;
1540         struct sctppcbhead *head;
1541         struct sctp_laddr *laddr, *oladdr;
1542
1543         SCTP_TCB_UNLOCK(stcb);
1544         SCTP_INP_INFO_WLOCK();
1545         SCTP_INP_WLOCK(old_inp);
1546         SCTP_INP_WLOCK(new_inp);
1547         SCTP_TCB_LOCK(stcb);
1548
1549         new_inp->sctp_ep.time_of_secret_change =
1550             old_inp->sctp_ep.time_of_secret_change;
1551         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1552             sizeof(old_inp->sctp_ep.secret_key));
1553         new_inp->sctp_ep.current_secret_number =
1554             old_inp->sctp_ep.current_secret_number;
1555         new_inp->sctp_ep.last_secret_number =
1556             old_inp->sctp_ep.last_secret_number;
1557         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1558
1559         /* make it so new data pours into the new socket */
1560         stcb->sctp_socket = new_inp->sctp_socket;
1561         stcb->sctp_ep = new_inp;
1562
1563         /* Copy the port across */
1564         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1565         rport = stcb->rport;
1566         /* Pull the tcb from the old association */
1567         LIST_REMOVE(stcb, sctp_tcbhash);
1568         LIST_REMOVE(stcb, sctp_tcblist);
1569
1570         /* Now insert the new_inp into the TCP connected hash */
1571         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1572             sctppcbinfo.hashtcpmark)];
1573
1574         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1575
1576         /* Now move the tcb into the endpoint list */
1577         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1578         /*
1579          * Question, do we even need to worry about the ep-hash since we
1580          * only have one connection? Probably not :> so lets get rid of it
1581          * and not suck up any kernel memory in that.
1582          */
1583
1584         /* Ok. Let's restart timer. */
1585         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1586                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
1587                     stcb, net);
1588         }
1589
1590         SCTP_INP_INFO_WUNLOCK();
1591         if (new_inp->sctp_tcbhash != NULL) {
1592                 SCTP_FREE(new_inp->sctp_tcbhash);
1593                 new_inp->sctp_tcbhash = NULL;
1594         }
1595         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1596                 /* Subset bound, so copy in the laddr list from the old_inp */
1597                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1598                         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
1599                             sctppcbinfo.ipi_zone_laddr);
1600                         if (laddr == NULL) {
1601                                 /*
1602                                  * Gak, what can we do? This assoc is really
1603                                  * HOSED. We probably should send an abort
1604                                  * here.
1605                                  */
1606 #ifdef SCTP_DEBUG
1607                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1608                                         printf("Association hosed in TCP model, out of laddr memory\n");
1609                                 }
1610 #endif                          /* SCTP_DEBUG */
1611                                 continue;
1612                         }
1613                         SCTP_INCR_LADDR_COUNT();
1614                         bzero(laddr, sizeof(*laddr));
1615                         laddr->ifa = oladdr->ifa;
1616                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1617                             sctp_nxt_addr);
1618                         new_inp->laddr_count++;
1619                 }
1620         }
1621         /*
1622          * Now any running timers need to be adjusted since we really don't
1623          * care if they are running or not just blast in the new_inp into
1624          * all of them.
1625          */
1626
1627         stcb->asoc.hb_timer.ep = (void *)new_inp;
1628         stcb->asoc.dack_timer.ep = (void *)new_inp;
1629         stcb->asoc.asconf_timer.ep = (void *)new_inp;
1630         stcb->asoc.strreset_timer.ep = (void *)new_inp;
1631         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
1632         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
1633         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
1634         /* now what about the nets? */
1635         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1636                 net->pmtu_timer.ep = (void *)new_inp;
1637                 net->rxt_timer.ep = (void *)new_inp;
1638                 net->fr_timer.ep = (void *)new_inp;
1639         }
1640         SCTP_INP_WUNLOCK(new_inp);
1641         SCTP_INP_WUNLOCK(old_inp);
1642 }
1643
1644 static int
1645 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
1646 {
1647         struct sctppcbhead *head;
1648         struct sctp_inpcb *t_inp;
1649
1650         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1651             sctppcbinfo.hashmark)];
1652
1653         LIST_FOREACH(t_inp, head, sctp_hash) {
1654                 if (t_inp->sctp_lport != lport) {
1655                         continue;
1656                 }
1657                 /* This one is in use. */
1658                 /* check the v6/v4 binding issue */
1659                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1660                     (((struct inpcb *)t_inp)->inp_flags & IN6P_IPV6_V6ONLY)
1661                     ) {
1662                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1663                                 /* collision in V6 space */
1664                                 return (1);
1665                         } else {
1666                                 /* inp is BOUND_V4 no conflict */
1667                                 continue;
1668                         }
1669                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1670                         /* t_inp is bound v4 and v6, conflict always */
1671                         return (1);
1672                 } else {
1673                         /* t_inp is bound only V4 */
1674                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1675                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
1676                             ) {
1677                                 /* no conflict */
1678                                 continue;
1679                         }
1680                         /* else fall through to conflict */
1681                 }
1682                 return (1);
1683         }
1684         return (0);
1685 }
1686
1687
1688
1689 int
1690 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1691 {
1692         /* bind a ep to a socket address */
1693         struct sctppcbhead *head;
1694         struct sctp_inpcb *inp, *inp_tmp;
1695         struct inpcb *ip_inp;
1696         int bindall;
1697         uint16_t lport;
1698         int error;
1699
1700         lport = 0;
1701         error = 0;
1702         bindall = 1;
1703         inp = (struct sctp_inpcb *)so->so_pcb;
1704         ip_inp = (struct inpcb *)so->so_pcb;
1705 #ifdef SCTP_DEBUG
1706         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1707                 if (addr) {
1708                         printf("Bind called port:%d\n",
1709                             ntohs(((struct sockaddr_in *)addr)->sin_port));
1710                         printf("Addr :");
1711                         sctp_print_address(addr);
1712                 }
1713         }
1714 #endif                          /* SCTP_DEBUG */
1715         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1716                 /* already did a bind, subsequent binds NOT allowed ! */
1717                 return (EINVAL);
1718         }
1719         if (addr != NULL) {
1720                 if (addr->sa_family == AF_INET) {
1721                         struct sockaddr_in *sin;
1722
1723                         /* IPV6_V6ONLY socket? */
1724                         if (
1725                             (ip_inp->inp_flags & IN6P_IPV6_V6ONLY)
1726                             ) {
1727                                 return (EINVAL);
1728                         }
1729                         if (addr->sa_len != sizeof(*sin))
1730                                 return (EINVAL);
1731
1732                         sin = (struct sockaddr_in *)addr;
1733                         lport = sin->sin_port;
1734
1735                         if (sin->sin_addr.s_addr != INADDR_ANY) {
1736                                 bindall = 0;
1737                         }
1738                 } else if (addr->sa_family == AF_INET6) {
1739                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
1740                         struct sockaddr_in6 *sin6;
1741
1742                         sin6 = (struct sockaddr_in6 *)addr;
1743
1744                         if (addr->sa_len != sizeof(*sin6))
1745                                 return (EINVAL);
1746
1747                         lport = sin6->sin6_port;
1748                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1749                                 bindall = 0;
1750                                 /* KAME hack: embed scopeid */
1751                                 if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
1752                                         return (EINVAL);
1753                         }
1754                         /* this must be cleared for ifa_ifwithaddr() */
1755                         sin6->sin6_scope_id = 0;
1756                 } else {
1757                         return (EAFNOSUPPORT);
1758                 }
1759         }
1760         SCTP_INP_INFO_WLOCK();
1761         SCTP_INP_WLOCK(inp);
1762         /* increase our count due to the unlock we do */
1763         SCTP_INP_INCR_REF(inp);
1764         if (lport) {
1765                 /*
1766                  * Did the caller specify a port? if so we must see if a ep
1767                  * already has this one bound.
1768                  */
1769                 /* got to be root to get at low ports */
1770                 if (ntohs(lport) < IPPORT_RESERVED) {
1771                         if (p && (error =
1772                             suser_cred(p->td_ucred, 0)
1773                             )) {
1774                                 SCTP_INP_DECR_REF(inp);
1775                                 SCTP_INP_WUNLOCK(inp);
1776                                 SCTP_INP_INFO_WUNLOCK();
1777                                 return (error);
1778                         }
1779                 }
1780                 if (p == NULL) {
1781                         SCTP_INP_DECR_REF(inp);
1782                         SCTP_INP_WUNLOCK(inp);
1783                         SCTP_INP_INFO_WUNLOCK();
1784                         return (error);
1785                 }
1786                 SCTP_INP_WUNLOCK(inp);
1787                 inp_tmp = sctp_pcb_findep(addr, 0, 1);
1788                 if (inp_tmp != NULL) {
1789                         /*
1790                          * lock guy returned and lower count note that we
1791                          * are not bound so inp_tmp should NEVER be inp. And
1792                          * it is this inp (inp_tmp) that gets the reference
1793                          * bump, so we must lower it.
1794                          */
1795                         SCTP_INP_DECR_REF(inp_tmp);
1796                         SCTP_INP_DECR_REF(inp);
1797                         /* unlock info */
1798                         SCTP_INP_INFO_WUNLOCK();
1799                         return (EADDRNOTAVAIL);
1800                 }
1801                 SCTP_INP_WLOCK(inp);
1802                 if (bindall) {
1803                         /* verify that no lport is not used by a singleton */
1804                         if (sctp_isport_inuse(inp, lport)) {
1805                                 /* Sorry someone already has this one bound */
1806                                 SCTP_INP_DECR_REF(inp);
1807                                 SCTP_INP_WUNLOCK(inp);
1808                                 SCTP_INP_INFO_WUNLOCK();
1809                                 return (EADDRNOTAVAIL);
1810                         }
1811                 }
1812         } else {
1813                 /*
1814                  * get any port but lets make sure no one has any address
1815                  * with this port bound
1816                  */
1817
1818                 /*
1819                  * setup the inp to the top (I could use the union but this
1820                  * is just as easy
1821                  */
1822                 uint32_t port_guess;
1823                 uint16_t port_attempt;
1824                 int not_done = 1;
1825
1826                 while (not_done) {
1827                         port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
1828                         port_attempt = (port_guess & 0x0000ffff);
1829                         if (port_attempt == 0) {
1830                                 goto next_half;
1831                         }
1832                         if (port_attempt < IPPORT_RESERVED) {
1833                                 port_attempt += IPPORT_RESERVED;
1834                         }
1835                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
1836                                 /* got a port we can use */
1837                                 not_done = 0;
1838                                 continue;
1839                         }
1840                         /* try upper half */
1841         next_half:
1842                         port_attempt = ((port_guess >> 16) & 0x0000ffff);
1843                         if (port_attempt == 0) {
1844                                 goto last_try;
1845                         }
1846                         if (port_attempt < IPPORT_RESERVED) {
1847                                 port_attempt += IPPORT_RESERVED;
1848                         }
1849                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
1850                                 /* got a port we can use */
1851                                 not_done = 0;
1852                                 continue;
1853                         }
1854                         /* try two half's added together */
1855         last_try:
1856                         port_attempt = (((port_guess >> 16) & 0x0000ffff) +
1857                             (port_guess & 0x0000ffff));
1858                         if (port_attempt == 0) {
1859                                 /* get a new random number */
1860                                 continue;
1861                         }
1862                         if (port_attempt < IPPORT_RESERVED) {
1863                                 port_attempt += IPPORT_RESERVED;
1864                         }
1865                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
1866                                 /* got a port we can use */
1867                                 not_done = 0;
1868                                 continue;
1869                         }
1870                 }
1871                 /* we don't get out of the loop until we have a port */
1872                 lport = htons(port_attempt);
1873         }
1874         SCTP_INP_DECR_REF(inp);
1875         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
1876             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
1877                 /*
1878                  * this really should not happen. The guy did a non-blocking
1879                  * bind and then did a close at the same time.
1880                  */
1881                 SCTP_INP_WUNLOCK(inp);
1882                 SCTP_INP_INFO_WUNLOCK();
1883                 return (EINVAL);
1884         }
1885         /* ok we look clear to give out this port, so lets setup the binding */
1886         if (bindall) {
1887                 /* binding to all addresses, so just set in the proper flags */
1888                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
1889                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
1890                 /* set the automatic addr changes from kernel flag */
1891                 if (sctp_auto_asconf == 0) {
1892                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
1893                 } else {
1894                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
1895                 }
1896         } else {
1897                 /*
1898                  * bind specific, make sure flags is off and add a new
1899                  * address structure to the sctp_addr_list inside the ep
1900                  * structure.
1901                  *
1902                  * We will need to allocate one and insert it at the head. The
1903                  * socketopt call can just insert new addresses in there as
1904                  * well. It will also have to do the embed scope kame hack
1905                  * too (before adding).
1906                  */
1907                 struct ifaddr *ifa;
1908                 struct sockaddr_storage store_sa;
1909
1910                 memset(&store_sa, 0, sizeof(store_sa));
1911                 if (addr->sa_family == AF_INET) {
1912                         struct sockaddr_in *sin;
1913
1914                         sin = (struct sockaddr_in *)&store_sa;
1915                         memcpy(sin, addr, sizeof(struct sockaddr_in));
1916                         sin->sin_port = 0;
1917                 } else if (addr->sa_family == AF_INET6) {
1918                         struct sockaddr_in6 *sin6;
1919
1920                         sin6 = (struct sockaddr_in6 *)&store_sa;
1921                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
1922                         sin6->sin6_port = 0;
1923                 }
1924                 /*
1925                  * first find the interface with the bound address need to
1926                  * zero out the port to find the address! yuck! can't do
1927                  * this earlier since need port for sctp_pcb_findep()
1928                  */
1929                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
1930                 if (ifa == NULL) {
1931                         /* Can't find an interface with that address */
1932                         SCTP_INP_WUNLOCK(inp);
1933                         SCTP_INP_INFO_WUNLOCK();
1934                         return (EADDRNOTAVAIL);
1935                 }
1936                 if (addr->sa_family == AF_INET6) {
1937                         struct in6_ifaddr *ifa6;
1938
1939                         ifa6 = (struct in6_ifaddr *)ifa;
1940                         /*
1941                          * allow binding of deprecated addresses as per RFC
1942                          * 2462 and ipng discussion
1943                          */
1944                         if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
1945                             IN6_IFF_ANYCAST |
1946                             IN6_IFF_NOTREADY)) {
1947                                 /* Can't bind a non-existent addr. */
1948                                 SCTP_INP_WUNLOCK(inp);
1949                                 SCTP_INP_INFO_WUNLOCK();
1950                                 return (EINVAL);
1951                         }
1952                 }
1953                 /* we're not bound all */
1954                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
1955                 /* set the automatic addr changes from kernel flag */
1956                 if (sctp_auto_asconf == 0) {
1957                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
1958                 } else {
1959                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
1960                 }
1961                 /* allow bindx() to send ASCONF's for binding changes */
1962                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
1963                 /* add this address to the endpoint list */
1964                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
1965                 if (error != 0) {
1966                         SCTP_INP_WUNLOCK(inp);
1967                         SCTP_INP_INFO_WUNLOCK();
1968                         return (error);
1969                 }
1970                 inp->laddr_count++;
1971         }
1972         /* find the bucket */
1973         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1974             sctppcbinfo.hashmark)];
1975         /* put it in the bucket */
1976         LIST_INSERT_HEAD(head, inp, sctp_hash);
1977 #ifdef SCTP_DEBUG
1978         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1979                 printf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
1980         }
1981 #endif
1982         /* set in the port */
1983         inp->sctp_lport = lport;
1984
1985         /* turn off just the unbound flag */
1986         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
1987         SCTP_INP_WUNLOCK(inp);
1988         SCTP_INP_INFO_WUNLOCK();
1989         return (0);
1990 }
1991
1992
1993 static void
1994 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
1995 {
1996         struct sctp_iterator *it;
1997
1998         /*
1999          * We enter with the only the ITERATOR_LOCK in place and a write
2000          * lock on the inp_info stuff.
2001          */
2002
2003         /*
2004          * Go through all iterators, we must do this since it is possible
2005          * that some iterator does NOT have the lock, but is waiting for it.
2006          * And the one that had the lock has either moved in the last
2007          * iteration or we just cleared it above. We need to find all of
2008          * those guys. The list of iterators should never be very big
2009          * though.
2010          */
2011         LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2012                 if (it == inp->inp_starting_point_for_iterator)
2013                         /* skip this guy, he's special */
2014                         continue;
2015                 if (it->inp == inp) {
2016                         /*
2017                          * This is tricky and we DON'T lock the iterator.
2018                          * Reason is he's running but waiting for me since
2019                          * inp->inp_starting_point_for_iterator has the lock
2020                          * on me (the guy above we skipped). This tells us
2021                          * its is not running but waiting for
2022                          * inp->inp_starting_point_for_iterator to be
2023                          * released by the guy that does have our INP in a
2024                          * lock.
2025                          */
2026                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2027                                 it->inp = NULL;
2028                                 it->stcb = NULL;
2029                         } else {
2030                                 /* set him up to do the next guy not me */
2031                                 it->inp = inp_next;
2032                                 it->stcb = NULL;
2033                         }
2034                 }
2035         }
2036         it = inp->inp_starting_point_for_iterator;
2037         if (it) {
2038                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2039                         it->inp = NULL;
2040                 } else {
2041                         it->inp = inp_next;
2042                 }
2043                 it->stcb = NULL;
2044         }
2045 }
2046
2047 /* release sctp_inpcb unbind the port */
2048 void
2049 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2050 {
2051         /*
2052          * Here we free a endpoint. We must find it (if it is in the Hash
2053          * table) and remove it from there. Then we must also find it in the
2054          * overall list and remove it from there. After all removals are
2055          * complete then any timer has to be stopped. Then start the actual
2056          * freeing. a) Any local lists. b) Any associations. c) The hash of
2057          * all associations. d) finally the ep itself.
2058          */
2059         struct sctp_pcb *m;
2060         struct sctp_inpcb *inp_save;
2061         struct sctp_tcb *asoc, *nasoc;
2062         struct sctp_laddr *laddr, *nladdr;
2063         struct inpcb *ip_pcb;
2064         struct socket *so;
2065
2066         struct sctp_queued_to_read *sq;
2067
2068         int s, cnt;
2069         sctp_sharedkey_t *shared_key;
2070
2071         s = splnet();
2072
2073 #ifdef SCTP_LOG_CLOSING
2074         sctp_log_closing(inp, NULL, 0);
2075 #endif
2076
2077         SCTP_ITERATOR_LOCK();
2078         so = inp->sctp_socket;
2079         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2080                 /* been here before.. eeks.. get out of here */
2081                 splx(s);
2082                 printf("This conflict in free SHOULD not be happening!\n");
2083                 SCTP_ITERATOR_UNLOCK();
2084 #ifdef SCTP_LOG_CLOSING
2085                 sctp_log_closing(inp, NULL, 1);
2086 #endif
2087                 return;
2088         }
2089         SCTP_ASOC_CREATE_LOCK(inp);
2090         SCTP_INP_INFO_WLOCK();
2091
2092         SCTP_INP_WLOCK(inp);
2093         /*
2094          * First time through we have the socket lock, after that no more.
2095          */
2096         if (from == 1) {
2097                 /*
2098                  * Once we are in we can remove the flag from = 1 is only
2099                  * passed from the actual closing routines that are called
2100                  * via the sockets layer.
2101                  */
2102                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2103         }
2104         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2105
2106         if (inp->control) {
2107                 sctp_m_freem(inp->control);
2108                 inp->control = NULL;
2109         }
2110         if (inp->pkt) {
2111                 sctp_m_freem(inp->pkt);
2112                 inp->pkt = NULL;
2113         }
2114         m = &inp->sctp_ep;
2115         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
2116                                          * here but I will be nice :> (i.e.
2117                                          * ip_pcb = ep;) */
2118         if (immediate == 0) {
2119                 int cnt_in_sd;
2120
2121                 cnt_in_sd = 0;
2122                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2123                     asoc = nasoc) {
2124                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2125                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2126                                 /* Skip guys being freed */
2127                                 asoc->sctp_socket = NULL;
2128                                 cnt_in_sd++;
2129                                 continue;
2130                         }
2131                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2132                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2133                                 /* Just abandon things in the front states */
2134                                 if (asoc->asoc.total_output_queue_size == 0) {
2135                                         sctp_free_assoc(inp, asoc, 1);
2136                                         continue;
2137                                 }
2138                         }
2139                         SCTP_TCB_LOCK(asoc);
2140                         /* Disconnect the socket please */
2141                         asoc->sctp_socket = NULL;
2142                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2143                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
2144                             (asoc->asoc.control_pdapi) ||
2145                             (asoc->asoc.size_on_all_streams > 0) ||
2146                             (so && (so->so_rcv.sb_cc > 0))
2147                             ) {
2148                                 /* Left with Data unread */
2149                                 struct mbuf *op_err;
2150
2151                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2152                                     0, M_DONTWAIT, 1, MT_DATA);
2153                                 if (op_err) {
2154                                         /* Fill in the user initiated abort */
2155                                         struct sctp_paramhdr *ph;
2156                                         uint32_t *ippp;
2157
2158                                         op_err->m_len =
2159                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2160                                         ph = mtod(op_err,
2161                                             struct sctp_paramhdr *);
2162                                         ph->param_type = htons(
2163                                             SCTP_CAUSE_USER_INITIATED_ABT);
2164                                         ph->param_length = htons(op_err->m_len);
2165                                         ippp = (uint32_t *) (ph + 1);
2166                                         *ippp = htonl(0x30000004);
2167                                 }
2168                                 sctp_send_abort_tcb(asoc, op_err);
2169                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2170                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2171                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2172                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2173                                 }
2174                                 sctp_free_assoc(inp, asoc, 1);
2175                                 continue;
2176                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2177                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2178                                     (asoc->asoc.stream_queue_cnt == 0)
2179                             ) {
2180                                 if (asoc->asoc.locked_on_sending) {
2181                                         goto abort_anyway;
2182                                 }
2183                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2184                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2185                                         /*
2186                                          * there is nothing queued to send,
2187                                          * so I send shutdown
2188                                          */
2189                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2190                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2191                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2192                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2193                                             asoc->asoc.primary_destination);
2194                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2195                                             asoc->asoc.primary_destination);
2196                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR);
2197                                 }
2198                         } else {
2199                                 /* mark into shutdown pending */
2200                                 struct sctp_stream_queue_pending *sp;
2201
2202                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2203                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2204                                     asoc->asoc.primary_destination);
2205                                 if (asoc->asoc.locked_on_sending) {
2206                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2207                                             sctp_streamhead);
2208                                         if (sp == NULL) {
2209                                                 printf("Error, sp is NULL, locked on sending is %p strm:%d\n",
2210                                                     asoc->asoc.locked_on_sending,
2211                                                     asoc->asoc.locked_on_sending->stream_no);
2212                                         } else {
2213                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2214                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2215                                         }
2216                                 }
2217                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2218                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2219                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2220                                         struct mbuf *op_err;
2221
2222                         abort_anyway:
2223                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2224                                             0, M_DONTWAIT, 1, MT_DATA);
2225                                         if (op_err) {
2226                                                 /*
2227                                                  * Fill in the user
2228                                                  * initiated abort
2229                                                  */
2230                                                 struct sctp_paramhdr *ph;
2231                                                 uint32_t *ippp;
2232
2233                                                 op_err->m_len =
2234                                                     (sizeof(struct sctp_paramhdr) +
2235                                                     sizeof(uint32_t));
2236                                                 ph = mtod(op_err,
2237                                                     struct sctp_paramhdr *);
2238                                                 ph->param_type = htons(
2239                                                     SCTP_CAUSE_USER_INITIATED_ABT);
2240                                                 ph->param_length = htons(op_err->m_len);
2241                                                 ippp = (uint32_t *) (ph + 1);
2242                                                 *ippp = htonl(0x30000005);
2243                                         }
2244                                         sctp_send_abort_tcb(asoc, op_err);
2245                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2246                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2247                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2248                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2249                                         }
2250                                         sctp_free_assoc(inp, asoc, 1);
2251                                         continue;
2252                                 }
2253                         }
2254                         cnt_in_sd++;
2255                         SCTP_TCB_UNLOCK(asoc);
2256                 }
2257                 /* now is there some left in our SHUTDOWN state? */
2258                 if (cnt_in_sd) {
2259                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2260                             SCTP_PCB_FLAGS_UNBOUND) {
2261                                 /*
2262                                  * ok, this guy has been bound. It's port is
2263                                  * somewhere in the sctppcbinfo hash table.
2264                                  * Remove it!
2265                                  *
2266                                  * Note we are depending on lookup by vtag to
2267                                  * find associations that are dieing. This
2268                                  * free's the port so we don't have to block
2269                                  * its useage. The SCTP_PCB_FLAGS_UNBOUND
2270                                  * flags will prevent us from doing this
2271                                  * again.
2272                                  */
2273                                 LIST_REMOVE(inp, sctp_hash);
2274                                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
2275                         }
2276                         splx(s);
2277
2278                         SCTP_INP_WUNLOCK(inp);
2279                         SCTP_ASOC_CREATE_UNLOCK(inp);
2280                         SCTP_INP_INFO_WUNLOCK();
2281                         SCTP_ITERATOR_UNLOCK();
2282 #ifdef SCTP_LOG_CLOSING
2283                         sctp_log_closing(inp, NULL, 2);
2284 #endif
2285                         return;
2286                 }
2287         }
2288         inp->sctp_socket = NULL;
2289         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2290             SCTP_PCB_FLAGS_UNBOUND) {
2291                 /*
2292                  * ok, this guy has been bound. It's port is somewhere in
2293                  * the sctppcbinfo hash table. Remove it!
2294                  */
2295                 LIST_REMOVE(inp, sctp_hash);
2296                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
2297         }
2298         /*
2299          * If there is a timer running to kill us, forget it, since it may
2300          * have a contest on the INP lock.. which would cause us to die ...
2301          */
2302         cnt = 0;
2303         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2304             asoc = nasoc) {
2305                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2306                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2307                         cnt++;
2308                         continue;
2309                 }
2310                 /* Free associations that are NOT killing us */
2311                 SCTP_TCB_LOCK(asoc);
2312                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
2313                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
2314                         struct mbuf *op_err;
2315                         uint32_t *ippp;
2316
2317                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2318                             0, M_DONTWAIT, 1, MT_DATA);
2319                         if (op_err) {
2320                                 /* Fill in the user initiated abort */
2321                                 struct sctp_paramhdr *ph;
2322
2323                                 op_err->m_len = (sizeof(struct sctp_paramhdr) +
2324                                     sizeof(uint32_t));
2325                                 ph = mtod(op_err, struct sctp_paramhdr *);
2326                                 ph->param_type = htons(
2327                                     SCTP_CAUSE_USER_INITIATED_ABT);
2328                                 ph->param_length = htons(op_err->m_len);
2329                                 ippp = (uint32_t *) (ph + 1);
2330                                 *ippp = htonl(0x30000006);
2331
2332                         }
2333                         sctp_send_abort_tcb(asoc, op_err);
2334                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2335                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2336                         cnt++;
2337                         SCTP_TCB_UNLOCK(asoc);
2338                         continue;
2339                 }
2340                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2341                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2342                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2343                 }
2344                 sctp_free_assoc(inp, asoc, 2);
2345         }
2346         if (cnt) {
2347                 /* Ok we have someone out there that will kill us */
2348                 callout_stop(&inp->sctp_ep.signature_change.timer);
2349                 SCTP_INP_WUNLOCK(inp);
2350                 SCTP_ASOC_CREATE_UNLOCK(inp);
2351                 SCTP_INP_INFO_WUNLOCK();
2352                 SCTP_ITERATOR_UNLOCK();
2353 #ifdef SCTP_LOG_CLOSING
2354                 sctp_log_closing(inp, NULL, 3);
2355 #endif
2356                 return;
2357         }
2358         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
2359                 callout_stop(&inp->sctp_ep.signature_change.timer);
2360                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2361                 SCTP_INP_WUNLOCK(inp);
2362                 SCTP_ASOC_CREATE_UNLOCK(inp);
2363                 SCTP_INP_INFO_WUNLOCK();
2364                 SCTP_ITERATOR_UNLOCK();
2365 #ifdef SCTP_LOG_CLOSING
2366                 sctp_log_closing(inp, NULL, 4);
2367 #endif
2368                 return;
2369         }
2370         callout_stop(&inp->sctp_ep.signature_change.timer);
2371         inp->sctp_ep.signature_change.type = 0;
2372         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2373
2374 #ifdef SCTP_LOG_CLOSING
2375         sctp_log_closing(inp, NULL, 5);
2376 #endif
2377
2378         callout_stop(&inp->sctp_ep.signature_change.timer);
2379         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
2380         /* Clear the read queue */
2381         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
2382                 TAILQ_REMOVE(&inp->read_queue, sq, next);
2383                 sctp_free_remote_addr(sq->whoFrom);
2384                 if (so)
2385                         so->so_rcv.sb_cc -= sq->length;
2386                 if (sq->data) {
2387                         sctp_m_freem(sq->data);
2388                         sq->data = NULL;
2389                 }
2390                 /*
2391                  * no need to free the net count, since at this point all
2392                  * assoc's are gone.
2393                  */
2394                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
2395                 SCTP_DECR_READQ_COUNT();
2396         }
2397         /* Now the sctp_pcb things */
2398         /*
2399          * free each asoc if it is not already closed/free. we can't use the
2400          * macro here since le_next will get freed as part of the
2401          * sctp_free_assoc() call.
2402          */
2403         cnt = 0;
2404         if (so) {
2405 #ifdef IPSEC
2406                 ipsec4_delete_pcbpolicy(ip_pcb);
2407 #endif                          /* IPSEC */
2408
2409                 /* Unlocks not needed since the socket is gone now */
2410         }
2411         if (ip_pcb->inp_options) {
2412                 (void)sctp_m_free(ip_pcb->inp_options);
2413                 ip_pcb->inp_options = 0;
2414         }
2415         if (ip_pcb->inp_moptions) {
2416                 ip_freemoptions(ip_pcb->inp_moptions);
2417                 ip_pcb->inp_moptions = 0;
2418         }
2419 #ifdef INET6
2420         if (ip_pcb->inp_vflag & INP_IPV6) {
2421                 struct in6pcb *in6p;
2422
2423                 in6p = (struct in6pcb *)inp;
2424                 ip6_freepcbopts(in6p->in6p_outputopts);
2425         }
2426 #endif                          /* INET6 */
2427         ip_pcb->inp_vflag = 0;
2428         /* free up authentication fields */
2429         if (inp->sctp_ep.local_auth_chunks != NULL)
2430                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2431         if (inp->sctp_ep.local_hmacs != NULL)
2432                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2433
2434         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2435         while (shared_key) {
2436                 LIST_REMOVE(shared_key, next);
2437                 sctp_free_sharedkey(shared_key);
2438                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2439         }
2440
2441         inp_save = LIST_NEXT(inp, sctp_list);
2442         LIST_REMOVE(inp, sctp_list);
2443
2444         /* fix any iterators only after out of the list */
2445         sctp_iterator_inp_being_freed(inp, inp_save);
2446         /*
2447          * if we have an address list the following will free the list of
2448          * ifaddr's that are set into this ep. Again macro limitations here,
2449          * since the LIST_FOREACH could be a bad idea.
2450          */
2451         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2452             laddr = nladdr) {
2453                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2454                 LIST_REMOVE(laddr, sctp_nxt_addr);
2455                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2456                 SCTP_DECR_LADDR_COUNT();
2457         }
2458         /* Now lets see about freeing the EP hash table. */
2459         if (inp->sctp_tcbhash != NULL) {
2460                 SCTP_FREE(inp->sctp_tcbhash);
2461                 inp->sctp_tcbhash = 0;
2462         }
2463         /* Now we must put the ep memory back into the zone pool */
2464         SCTP_INP_LOCK_DESTROY(inp);
2465         SCTP_INP_READ_DESTROY(inp);
2466         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2467         SCTP_INP_INFO_WUNLOCK();
2468
2469         SCTP_ITERATOR_UNLOCK();
2470
2471         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2472         SCTP_DECR_EP_COUNT();
2473
2474         splx(s);
2475 }
2476
2477
2478 struct sctp_nets *
2479 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2480 {
2481         struct sctp_nets *net;
2482
2483         /* locate the address */
2484         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2485                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2486                         return (net);
2487         }
2488         return (NULL);
2489 }
2490
2491
2492 /*
2493  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
2494  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
2495  * stats of stuff.
2496  */
2497 int
2498 sctp_is_address_on_local_host(struct sockaddr *addr)
2499 {
2500         struct ifnet *ifn;
2501         struct ifaddr *ifa;
2502
2503         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2504                 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
2505                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2506                                 /* same family */
2507                                 if (addr->sa_family == AF_INET) {
2508                                         struct sockaddr_in *sin, *sin_c;
2509
2510                                         sin = (struct sockaddr_in *)addr;
2511                                         sin_c = (struct sockaddr_in *)
2512                                             ifa->ifa_addr;
2513                                         if (sin->sin_addr.s_addr ==
2514                                             sin_c->sin_addr.s_addr) {
2515                                                 /*
2516                                                  * we are on the same
2517                                                  * machine
2518                                                  */
2519                                                 return (1);
2520                                         }
2521                                 } else if (addr->sa_family == AF_INET6) {
2522                                         struct sockaddr_in6 *sin6, *sin_c6;
2523
2524                                         sin6 = (struct sockaddr_in6 *)addr;
2525                                         sin_c6 = (struct sockaddr_in6 *)
2526                                             ifa->ifa_addr;
2527                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2528                                             &sin_c6->sin6_addr)) {
2529                                                 /*
2530                                                  * we are on the same
2531                                                  * machine
2532                                                  */
2533                                                 return (1);
2534                                         }
2535                                 }
2536                         }
2537                 }
2538         }
2539         return (0);
2540 }
2541
2542 int
2543 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2544     int set_scope, int from)
2545 {
2546         /*
2547          * The following is redundant to the same lines in the
2548          * sctp_aloc_assoc() but is needed since other's call the add
2549          * address function
2550          */
2551         struct sctp_nets *net, *netfirst;
2552         int addr_inscope;
2553
2554 #ifdef SCTP_DEBUG
2555         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2556                 printf("Adding an address (from:%d) to the peer: ", from);
2557                 sctp_print_address(newaddr);
2558         }
2559 #endif
2560
2561         netfirst = sctp_findnet(stcb, newaddr);
2562         if (netfirst) {
2563                 /*
2564                  * Lie and return ok, we don't want to make the association
2565                  * go away for this behavior. It will happen in the TCP
2566                  * model in a connected socket. It does not reach the hash
2567                  * table until after the association is built so it can't be
2568                  * found. Mark as reachable, since the initial creation will
2569                  * have been cleared and the NOT_IN_ASSOC flag will have
2570                  * been added... and we don't want to end up removing it
2571                  * back out.
2572                  */
2573                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2574                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
2575                             SCTP_ADDR_UNCONFIRMED);
2576                 } else {
2577                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2578                 }
2579
2580                 return (0);
2581         }
2582         addr_inscope = 1;
2583         if (newaddr->sa_family == AF_INET) {
2584                 struct sockaddr_in *sin;
2585
2586                 sin = (struct sockaddr_in *)newaddr;
2587                 if (sin->sin_addr.s_addr == 0) {
2588                         /* Invalid address */
2589                         return (-1);
2590                 }
2591                 /* zero out the bzero area */
2592                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2593
2594                 /* assure len is set */
2595                 sin->sin_len = sizeof(struct sockaddr_in);
2596                 if (set_scope) {
2597 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2598                         stcb->ipv4_local_scope = 1;
2599 #else
2600                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2601                                 stcb->asoc.ipv4_local_scope = 1;
2602                         }
2603 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2604
2605                         if (sctp_is_address_on_local_host(newaddr)) {
2606                                 stcb->asoc.loopback_scope = 1;
2607                                 stcb->asoc.ipv4_local_scope = 1;
2608                                 stcb->asoc.local_scope = 1;
2609                                 stcb->asoc.site_scope = 1;
2610                         }
2611                 } else {
2612                         if (from == 8) {
2613                                 /* From connectx */
2614                                 if (sctp_is_address_on_local_host(newaddr)) {
2615                                         stcb->asoc.loopback_scope = 1;
2616                                         stcb->asoc.ipv4_local_scope = 1;
2617                                         stcb->asoc.local_scope = 1;
2618                                         stcb->asoc.site_scope = 1;
2619                                 }
2620                         }
2621                         /* Validate the address is in scope */
2622                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2623                             (stcb->asoc.ipv4_local_scope == 0)) {
2624                                 addr_inscope = 0;
2625                         }
2626                 }
2627         } else if (newaddr->sa_family == AF_INET6) {
2628                 struct sockaddr_in6 *sin6;
2629
2630                 sin6 = (struct sockaddr_in6 *)newaddr;
2631                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2632                         /* Invalid address */
2633                         return (-1);
2634                 }
2635                 /* assure len is set */
2636                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2637                 if (set_scope) {
2638                         if (sctp_is_address_on_local_host(newaddr)) {
2639                                 stcb->asoc.loopback_scope = 1;
2640                                 stcb->asoc.local_scope = 1;
2641                                 stcb->asoc.ipv4_local_scope = 1;
2642                                 stcb->asoc.site_scope = 1;
2643                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2644                                 /*
2645                                  * If the new destination is a LINK_LOCAL we
2646                                  * must have common site scope. Don't set
2647                                  * the local scope since we may not share
2648                                  * all links, only loopback can do this.
2649                                  * Links on the local network would also be
2650                                  * on our private network for v4 too.
2651                                  */
2652                                 stcb->asoc.ipv4_local_scope = 1;
2653                                 stcb->asoc.site_scope = 1;
2654                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2655                                 /*
2656                                  * If the new destination is SITE_LOCAL then
2657                                  * we must have site scope in common.
2658                                  */
2659                                 stcb->asoc.site_scope = 1;
2660                         }
2661                 } else {
2662                         if (from == 8) {
2663                                 /* From connectx */
2664                                 if (sctp_is_address_on_local_host(newaddr)) {
2665                                         stcb->asoc.loopback_scope = 1;
2666                                         stcb->asoc.ipv4_local_scope = 1;
2667                                         stcb->asoc.local_scope = 1;
2668                                         stcb->asoc.site_scope = 1;
2669                                 }
2670                         }
2671                         /* Validate the address is in scope */
2672                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2673                             (stcb->asoc.loopback_scope == 0)) {
2674                                 addr_inscope = 0;
2675                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2676                             (stcb->asoc.local_scope == 0)) {
2677                                 addr_inscope = 0;
2678                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2679                             (stcb->asoc.site_scope == 0)) {
2680                                 addr_inscope = 0;
2681                         }
2682                 }
2683         } else {
2684                 /* not supported family type */
2685                 return (-1);
2686         }
2687         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2688         if (net == NULL) {
2689                 return (-1);
2690         }
2691         SCTP_INCR_RADDR_COUNT();
2692         bzero(net, sizeof(*net));
2693         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2694         if (newaddr->sa_family == AF_INET) {
2695                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2696         } else if (newaddr->sa_family == AF_INET6) {
2697                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2698         }
2699         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2700         net->failure_threshold = stcb->asoc.def_net_failure;
2701         if (addr_inscope == 0) {
2702                 net->dest_state = (SCTP_ADDR_REACHABLE |
2703                     SCTP_ADDR_OUT_OF_SCOPE);
2704         } else {
2705                 if (from == 8)
2706                         /* 8 is passed by connect_x */
2707                         net->dest_state = SCTP_ADDR_REACHABLE;
2708                 else
2709                         net->dest_state = SCTP_ADDR_REACHABLE |
2710                             SCTP_ADDR_UNCONFIRMED;
2711         }
2712         net->RTO = stcb->asoc.initial_rto;
2713         stcb->asoc.numnets++;
2714         *(&net->ref_count) = 1;
2715         net->tos_flowlabel = 0;
2716 #ifdef AF_INET
2717         if (newaddr->sa_family == AF_INET)
2718                 net->tos_flowlabel = stcb->asoc.default_tos;
2719 #endif
2720 #ifdef AF_INET6
2721         if (newaddr->sa_family == AF_INET6)
2722                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
2723 #endif
2724         /* Init the timer structure */
2725         callout_init(&net->rxt_timer.timer, 1);
2726         callout_init(&net->fr_timer.timer, 1);
2727         callout_init(&net->pmtu_timer.timer, 1);
2728
2729         /* Now generate a route for this guy */
2730         /* KAME hack: embed scopeid */
2731         if (newaddr->sa_family == AF_INET6) {
2732                 struct sockaddr_in6 *sin6;
2733
2734                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2735                 (void)sa6_embedscope(sin6, ip6_use_defzone);
2736                 sin6->sin6_scope_id = 0;
2737         }
2738         rtalloc_ign((struct route *)&net->ro, 0UL);
2739         if (newaddr->sa_family == AF_INET6) {
2740                 struct sockaddr_in6 *sin6;
2741
2742                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2743                 (void)sa6_recoverscope(sin6);
2744         }
2745         if ((net->ro.ro_rt) &&
2746             (net->ro.ro_rt->rt_ifp)) {
2747                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2748                 if (from == 1) {
2749                         stcb->asoc.smallest_mtu = net->mtu;
2750                 }
2751                 /* start things off to match mtu of interface please. */
2752                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2753         } else {
2754                 net->mtu = stcb->asoc.smallest_mtu;
2755         }
2756
2757         if (stcb->asoc.smallest_mtu > net->mtu) {
2758                 stcb->asoc.smallest_mtu = net->mtu;
2759         }
2760         /*
2761          * We take the max of the burst limit times a MTU or the
2762          * INITIAL_CWND. We then limit this to 4 MTU's of sending.
2763          */
2764         net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND));
2765
2766         /* we always get at LEAST 2 MTU's */
2767         if (net->cwnd < (2 * net->mtu)) {
2768                 net->cwnd = 2 * net->mtu;
2769         }
2770         net->ssthresh = stcb->asoc.peers_rwnd;
2771
2772 #if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING)
2773         sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION);
2774 #endif
2775
2776         /*
2777          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
2778          * of assoc (2005/06/27, iyengar@cis.udel.edu)
2779          */
2780         net->find_pseudo_cumack = 1;
2781         net->find_rtx_pseudo_cumack = 1;
2782         net->src_addr_selected = 0;
2783         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2784         if (net->ro.ro_rt == NULL) {
2785                 /* Since we have no route put it at the back */
2786                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2787         } else if (netfirst == NULL) {
2788                 /* We are the first one in the pool. */
2789                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2790         } else if (netfirst->ro.ro_rt == NULL) {
2791                 /*
2792                  * First one has NO route. Place this one ahead of the first
2793                  * one.
2794                  */
2795                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2796         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2797                 /*
2798                  * This one has a different interface than the one at the
2799                  * top of the list. Place it ahead.
2800                  */
2801                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2802         } else {
2803                 /*
2804                  * Ok we have the same interface as the first one. Move
2805                  * forward until we find either a) one with a NULL route...
2806                  * insert ahead of that b) one with a different ifp.. insert
2807                  * after that. c) end of the list.. insert at the tail.
2808                  */
2809                 struct sctp_nets *netlook;
2810
2811                 do {
2812                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2813                         if (netlook == NULL) {
2814                                 /* End of the list */
2815                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2816                                     sctp_next);
2817                                 break;
2818                         } else if (netlook->ro.ro_rt == NULL) {
2819                                 /* next one has NO route */
2820                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2821                                 break;
2822                         } else if (netlook->ro.ro_rt->rt_ifp !=
2823                             net->ro.ro_rt->rt_ifp) {
2824                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2825                                     net, sctp_next);
2826                                 break;
2827                         }
2828                         /* Shift forward */
2829                         netfirst = netlook;
2830                 } while (netlook != NULL);
2831         }
2832
2833         /* got to have a primary set */
2834         if (stcb->asoc.primary_destination == 0) {
2835                 stcb->asoc.primary_destination = net;
2836         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2837                     (net->ro.ro_rt) &&
2838             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
2839                 /* No route to current primary adopt new primary */
2840                 stcb->asoc.primary_destination = net;
2841         }
2842         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2843             net);
2844         /* Validate primary is first */
2845         net = TAILQ_FIRST(&stcb->asoc.nets);
2846         if ((net != stcb->asoc.primary_destination) &&
2847             (stcb->asoc.primary_destination)) {
2848                 /*
2849                  * first one on the list is NOT the primary sctp_cmpaddr()
2850                  * is much more efficent if the primary is the first on the
2851                  * list, make it so.
2852                  */
2853                 TAILQ_REMOVE(&stcb->asoc.nets,
2854                     stcb->asoc.primary_destination, sctp_next);
2855                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
2856                     stcb->asoc.primary_destination, sctp_next);
2857         }
2858         return (0);
2859 }
2860
2861
2862 /*
2863  * allocate an association and add it to the endpoint. The caller must be
2864  * careful to add all additional addresses once they are know right away or
2865  * else the assoc will be may experience a blackout scenario.
2866  */
2867 struct sctp_tcb *
2868 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2869     int for_a_init, int *error, uint32_t override_tag)
2870 {
2871         struct sctp_tcb *stcb;
2872         struct sctp_association *asoc;
2873         struct sctpasochead *head;
2874         uint16_t rport;
2875         int err;
2876
2877         /*
2878          * Assumption made here: Caller has done a
2879          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
2880          * address does not exist already.
2881          */
2882         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2883                 /* Hit max assoc, sorry no more */
2884                 *error = ENOBUFS;
2885                 return (NULL);
2886         }
2887         SCTP_INP_RLOCK(inp);
2888         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2889                 /*
2890                  * If its in the TCP pool, its NOT allowed to create an
2891                  * association. The parent listener needs to call
2892                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
2893                  * off, or connected one does this.. its an error.
2894                  */
2895                 SCTP_INP_RUNLOCK(inp);
2896                 *error = EINVAL;
2897                 return (NULL);
2898         }
2899 #ifdef SCTP_DEBUG
2900         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2901                 printf("Allocate an association for peer:");
2902                 if (firstaddr)
2903                         sctp_print_address(firstaddr);
2904                 else
2905                         printf("None\n");
2906                 printf("Port:%d\n",
2907                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2908         }
2909 #endif                          /* SCTP_DEBUG */
2910         if (firstaddr->sa_family == AF_INET) {
2911                 struct sockaddr_in *sin;
2912
2913                 sin = (struct sockaddr_in *)firstaddr;
2914                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2915                         /* Invalid address */
2916                         SCTP_INP_RUNLOCK(inp);
2917                         *error = EINVAL;
2918                         return (NULL);
2919                 }
2920                 rport = sin->sin_port;
2921         } else if (firstaddr->sa_family == AF_INET6) {
2922                 struct sockaddr_in6 *sin6;
2923
2924                 sin6 = (struct sockaddr_in6 *)firstaddr;
2925                 if ((sin6->sin6_port == 0) ||
2926                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2927                         /* Invalid address */
2928                         SCTP_INP_RUNLOCK(inp);
2929                         *error = EINVAL;
2930                         return (NULL);
2931                 }
2932                 rport = sin6->sin6_port;
2933         } else {
2934                 /* not supported family type */
2935                 SCTP_INP_RUNLOCK(inp);
2936                 *error = EINVAL;
2937                 return (NULL);
2938         }
2939         SCTP_INP_RUNLOCK(inp);
2940         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2941                 /*
2942                  * If you have not performed a bind, then we need to do the
2943                  * ephemerial bind for you.
2944                  */
2945                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2946                     (struct sockaddr *)NULL,
2947                     (struct thread *)NULL
2948                     ))) {
2949                         /* bind error, probably perm */
2950                         *error = err;
2951                         return (NULL);
2952                 }
2953         }
2954         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
2955         if (stcb == NULL) {
2956                 /* out of memory? */
2957                 *error = ENOMEM;
2958                 return (NULL);
2959         }
2960         SCTP_INCR_ASOC_COUNT();
2961
2962         bzero(stcb, sizeof(*stcb));
2963         asoc = &stcb->asoc;
2964         SCTP_TCB_LOCK_INIT(stcb);
2965         SCTP_TCB_SEND_LOCK_INIT(stcb);
2966         /* setup back pointer's */
2967         stcb->sctp_ep = inp;
2968         stcb->sctp_socket = inp->sctp_socket;
2969         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
2970                 /* failed */
2971                 SCTP_TCB_LOCK_DESTROY(stcb);
2972                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
2973                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
2974                 SCTP_DECR_ASOC_COUNT();
2975                 *error = err;
2976                 return (NULL);
2977         }
2978         /* and the port */
2979         stcb->rport = rport;
2980         SCTP_INP_INFO_WLOCK();
2981         SCTP_INP_WLOCK(inp);
2982         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2983                 /* inpcb freed while alloc going on */
2984                 SCTP_TCB_LOCK_DESTROY(stcb);
2985                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
2986                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
2987                 SCTP_INP_WUNLOCK(inp);
2988                 SCTP_INP_INFO_WUNLOCK();
2989                 SCTP_DECR_ASOC_COUNT();
2990                 *error = EINVAL;
2991                 return (NULL);
2992         }
2993         SCTP_TCB_LOCK(stcb);
2994
2995         /* now that my_vtag is set, add it to the hash */
2996         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
2997             sctppcbinfo.hashasocmark)];
2998         /* put it in the bucket in the vtag hash of assoc's for the system */
2999         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3000         SCTP_INP_INFO_WUNLOCK();
3001
3002         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3003                 /* failure.. memory error? */
3004                 if (asoc->strmout)
3005                         SCTP_FREE(asoc->strmout);
3006                 if (asoc->mapping_array)
3007                         SCTP_FREE(asoc->mapping_array);
3008
3009                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3010                 SCTP_DECR_ASOC_COUNT();
3011                 SCTP_TCB_LOCK_DESTROY(stcb);
3012                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3013                 *error = ENOBUFS;
3014                 return (NULL);
3015         }
3016         /* Init all the timers */
3017         callout_init(&asoc->hb_timer.timer, 1);
3018         callout_init(&asoc->dack_timer.timer, 1);
3019         callout_init(&asoc->asconf_timer.timer, 1);
3020         callout_init(&asoc->strreset_timer.timer, 1);
3021         callout_init(&asoc->shut_guard_timer.timer, 1);
3022         callout_init(&asoc->autoclose_timer.timer, 1);
3023         callout_init(&asoc->delayed_event_timer.timer, 1);
3024         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3025         /* now file the port under the hash as well */
3026         if (inp->sctp_tcbhash != NULL) {
3027                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3028                     inp->sctp_hashmark)];
3029                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3030         }
3031         SCTP_INP_WUNLOCK(inp);
3032 #ifdef SCTP_DEBUG
3033         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3034                 printf("Association %p now allocated\n", stcb);
3035         }
3036 #endif
3037         return (stcb);
3038 }
3039
3040
3041 void
3042 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3043 {
3044         struct sctp_association *asoc;
3045
3046         asoc = &stcb->asoc;
3047         asoc->numnets--;
3048         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3049         sctp_free_remote_addr(net);
3050         if (net == asoc->primary_destination) {
3051                 /* Reset primary */
3052                 struct sctp_nets *lnet;
3053
3054                 lnet = TAILQ_FIRST(&asoc->nets);
3055                 /* Try to find a confirmed primary */
3056                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet,
3057                     0);
3058         }
3059         if (net == asoc->last_data_chunk_from) {
3060                 /* Reset primary */
3061                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3062         }
3063         if (net == asoc->last_control_chunk_from) {
3064                 /* Clear net */
3065                 asoc->last_control_chunk_from = NULL;
3066         }
3067 /*      if (net == asoc->asconf_last_sent_to) {*/
3068         /* Reset primary */
3069 /*              asoc->asconf_last_sent_to = TAILQ_FIRST(&asoc->nets);*/
3070 /*      }*/
3071 }
3072
3073 /*
3074  * remove a remote endpoint address from an association, it will fail if the
3075  * address does not exist.
3076  */
3077 int
3078 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3079 {
3080         /*
3081          * Here we need to remove a remote address. This is quite simple, we
3082          * first find it in the list of address for the association
3083          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3084          * on that item. Note we do not allow it to be removed if there are
3085          * no other addresses.
3086          */
3087         struct sctp_association *asoc;
3088         struct sctp_nets *net, *net_tmp;
3089
3090         asoc = &stcb->asoc;
3091
3092         /* locate the address */
3093         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3094                 net_tmp = TAILQ_NEXT(net, sctp_next);
3095                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3096                         continue;
3097                 }
3098                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3099                     remaddr)) {
3100                         /* we found the guy */
3101                         if (asoc->numnets < 2) {
3102                                 /* Must have at LEAST two remote addresses */
3103                                 return (-1);
3104                         } else {
3105                                 sctp_remove_net(stcb, net);
3106                                 return (0);
3107                         }
3108                 }
3109         }
3110         /* not found. */
3111         return (-2);
3112 }
3113
3114
3115 static void
3116 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag)
3117 {
3118         struct sctpvtaghead *chain;
3119         struct sctp_tagblock *twait_block;
3120         struct timeval now;
3121         int set, i;
3122
3123         SCTP_GETTIME_TIMEVAL(&now);
3124         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3125         set = 0;
3126         if (!LIST_EMPTY(chain)) {
3127                 /* Block(s) present, lets find space, and expire on the fly */
3128                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3129                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3130                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3131                                     !set) {
3132                                         twait_block->vtag_block[i].tv_sec_at_expire =
3133                                             now.tv_sec + SCTP_TIME_WAIT;
3134                                         twait_block->vtag_block[i].v_tag = tag;
3135                                         set = 1;
3136                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3137                                             ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3138                                     now.tv_sec)) {
3139                                         /* Audit expires this guy */
3140                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3141                                         twait_block->vtag_block[i].v_tag = 0;
3142                                         if (set == 0) {
3143                                                 /* Reuse it for my new tag */
3144                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3145                                                 twait_block->vtag_block[0].v_tag = tag;
3146                                                 set = 1;
3147                                         }
3148                                 }
3149                         }
3150                         if (set) {
3151                                 /*
3152                                  * We only do up to the block where we can
3153                                  * place our tag for audits
3154                                  */
3155                                 break;
3156                         }
3157                 }
3158         }
3159         /* Need to add a new block to chain */
3160         if (!set) {
3161                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
3162                     sizeof(struct sctp_tagblock), "TimeWait");
3163                 if (twait_block == NULL) {
3164                         return;
3165                 }
3166                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3167                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3168                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3169                     SCTP_TIME_WAIT;
3170                 twait_block->vtag_block[0].v_tag = tag;
3171         }
3172 }
3173
3174
3175 static void
3176 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3177 {
3178         struct sctp_iterator *it;
3179
3180         /*
3181          * Unlock the tcb lock we do this so we avoid a dead lock scenario
3182          * where the iterator is waiting on the TCB lock and the TCB lock is
3183          * waiting on the iterator lock.
3184          */
3185         it = stcb->asoc.stcb_starting_point_for_iterator;
3186         if (it == NULL) {
3187                 return;
3188         }
3189         if (it->inp != stcb->sctp_ep) {
3190                 /* hmm, focused on the wrong one? */
3191                 return;
3192         }
3193         if (it->stcb != stcb) {
3194                 return;
3195         }
3196         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3197         if (it->stcb == NULL) {
3198                 /* done with all asoc's in this assoc */
3199                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3200                         it->inp = NULL;
3201                 } else {
3202                         it->inp = LIST_NEXT(inp, sctp_list);
3203                 }
3204         }
3205 }
3206
3207 /*
3208  * Free the association after un-hashing the remote port.
3209  */
3210 int
3211 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree)
3212 {
3213         int i;
3214         struct sctp_association *asoc;
3215         struct sctp_nets *net, *prev;
3216         struct sctp_laddr *laddr;
3217         struct sctp_tmit_chunk *chk;
3218         struct sctp_asconf_addr *aparam;
3219         struct sctp_stream_reset_list *liste;
3220         struct sctp_queued_to_read *sq;
3221         struct sctp_stream_queue_pending *sp;
3222         sctp_sharedkey_t *shared_key;
3223         struct socket *so;
3224         int ccnt = 0;
3225         int s, cnt = 0;
3226
3227         /* first, lets purge the entry from the hash table. */
3228         s = splnet();
3229
3230 #ifdef SCTP_LOG_CLOSING
3231         sctp_log_closing(inp, stcb, 6);
3232 #endif
3233         if (stcb->asoc.state == 0) {
3234 #ifdef SCTP_LOG_CLOSING
3235                 sctp_log_closing(inp, NULL, 7);
3236 #endif
3237                 splx(s);
3238                 /* there is no asoc, really TSNH :-0 */
3239                 return (1);
3240         }
3241         asoc = &stcb->asoc;
3242         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3243             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3244                 /* nothing around */
3245                 so = NULL;
3246         else
3247                 so = inp->sctp_socket;
3248
3249         /*
3250          * We used timer based freeing if a reader or writer is in the way.
3251          * So we first check if we are actually being called from a timer,
3252          * if so we abort early if a reader or writer is still in the way.
3253          */
3254         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
3255             (from_inpcbfree == 0)) {
3256                 /*
3257                  * is it the timer driving us? if so are the reader/writers
3258                  * gone?
3259                  */
3260                 if (stcb->asoc.refcnt) {
3261                         /* nope, reader or writer in the way */
3262                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3263                         /* no asoc destroyed */
3264                         SCTP_TCB_UNLOCK(stcb);
3265                         splx(s);
3266 #ifdef SCTP_LOG_CLOSING
3267                         sctp_log_closing(inp, stcb, 8);
3268 #endif
3269                         return (0);
3270                 }
3271         }
3272         /* now clean up any other timers */
3273         callout_stop(&asoc->hb_timer.timer);
3274         callout_stop(&asoc->dack_timer.timer);
3275         callout_stop(&asoc->strreset_timer.timer);
3276         callout_stop(&asoc->asconf_timer.timer);
3277         callout_stop(&asoc->autoclose_timer.timer);
3278         callout_stop(&asoc->shut_guard_timer.timer);
3279         callout_stop(&asoc->delayed_event_timer.timer);
3280
3281         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3282                 callout_stop(&net->fr_timer.timer);
3283                 callout_stop(&net->rxt_timer.timer);
3284                 callout_stop(&net->pmtu_timer.timer);
3285         }
3286
3287         stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
3288         if ((from_inpcbfree != 2) && (stcb->asoc.refcnt)) {
3289                 /* reader or writer in the way */
3290                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3291                 SCTP_TCB_UNLOCK(stcb);
3292                 splx(s);
3293 #ifdef SCTP_LOG_CLOSING
3294                 sctp_log_closing(inp, stcb, 9);
3295 #endif
3296                 /* no asoc destroyed */
3297                 return (0);
3298         }
3299 #ifdef SCTP_LOG_CLOSING
3300         sctp_log_closing(inp, stcb, 10);
3301 #endif
3302         /* Now the read queue needs to be cleaned up */
3303         SCTP_INP_READ_LOCK(inp);
3304         TAILQ_FOREACH(sq, &inp->read_queue, next) {
3305                 if (sq->stcb == stcb) {
3306                         sq->do_not_ref_stcb = 1;
3307                         sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
3308                         if ((from_inpcbfree == 0) && so) {
3309                                 /*
3310                                  * Only if we have a socket lock do we do
3311                                  * this
3312                                  */
3313                                 if ((sq->held_length) ||
3314                                     (sq->end_added == 0) ||
3315                                     ((sq->length == 0) && (sq->end_added == 0))) {
3316                                         /* Held for PD-API */
3317                                         sq->held_length = 0;
3318                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3319                                                 /*
3320                                                  * need to change to PD-API
3321                                                  * aborted
3322                                                  */
3323                                                 stcb->asoc.control_pdapi = sq;
3324                                                 sctp_notify_partial_delivery_indication(stcb,
3325                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1);
3326                                                 stcb->asoc.control_pdapi = NULL;
3327                                         } else {
3328                                                 /*
3329                                                  * need to get the reader to
3330                                                  * remove it
3331                                                  */
3332                                                 sq->length = 0;
3333                                                 if (sq->data) {
3334                                                         struct mbuf *m;
3335
3336                                                         m = sq->data;
3337                                                         while (m) {
3338                                                                 sctp_sbfree(sq, stcb, &stcb->sctp_socket->so_rcv, m);
3339                                                                 m = sctp_m_free(m);
3340                                                         }
3341                                                         sq->data = NULL;
3342                                                         sq->tail_mbuf = NULL;
3343                                                 }
3344                                         }
3345                                 }
3346                         }
3347                         sq->end_added = 1;
3348                         cnt++;
3349                 }
3350         }
3351         SCTP_INP_READ_UNLOCK(inp);
3352         if (stcb->block_entry) {
3353                 stcb->block_entry->error = ECONNRESET;
3354                 stcb->block_entry = NULL;
3355         }
3356         if ((from_inpcbfree == 0) && so) {
3357                 sctp_sorwakeup(inp, so);
3358         }
3359         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3360             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3361                 /*
3362                  * For TCP type we need special handling when we are
3363                  * connected. We also include the peel'ed off ones to.
3364                  */
3365                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3366                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3367                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
3368                         if (so) {
3369                                 SOCK_LOCK(so);
3370                                 if (so->so_rcv.sb_cc == 0) {
3371                                         so->so_state &= ~(SS_ISCONNECTING |
3372                                             SS_ISDISCONNECTING |
3373                                             SS_ISCONFIRMING |
3374                                             SS_ISCONNECTED);
3375                                 }
3376                                 SOCK_UNLOCK(so);
3377                                 sctp_sowwakeup(inp, so);
3378                                 sctp_sorwakeup(inp, so);
3379                                 wakeup(&so->so_timeo);
3380                         }
3381                 }
3382         }
3383         /*
3384          * When I reach here, no others want to kill the assoc yet.. and I
3385          * own the lock. Now its possible an abort comes in when I do the
3386          * lock exchange below to grab all the locks to do the final take
3387          * out. to prevent this we increment the count, which will start a
3388          * timer and blow out above thus assuring us that we hold exclusive
3389          * killing of the asoc. Note that after getting back the TCB lock we
3390          * will go ahead and increment the counter back up and stop any
3391          * timer a passing stranger may have started :-S
3392          */
3393         if (from_inpcbfree == 0) {
3394                 atomic_add_int(&stcb->asoc.refcnt, 1);
3395
3396                 SCTP_TCB_UNLOCK(stcb);
3397
3398                 SCTP_ITERATOR_LOCK();
3399                 SCTP_INP_INFO_WLOCK();
3400                 SCTP_INP_WLOCK(inp);
3401                 SCTP_TCB_LOCK(stcb);
3402         }
3403         /* Stop any timer someone may have started */
3404         callout_stop(&asoc->strreset_timer.timer);
3405         /*
3406          * Make it invalid too, that way if its about to run it will abort
3407          * and return.
3408          */
3409         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
3410         sctp_iterator_asoc_being_freed(inp, stcb);
3411         /* re-increment the lock */
3412         if (from_inpcbfree == 0) {
3413                 atomic_add_int(&stcb->asoc.refcnt, -1);
3414         }
3415         /* now restop the timers to be sure - this is paranoia at is finest! */
3416         callout_stop(&asoc->hb_timer.timer);
3417         callout_stop(&asoc->dack_timer.timer);
3418         callout_stop(&asoc->strreset_timer.timer);
3419         callout_stop(&asoc->asconf_timer.timer);
3420         callout_stop(&asoc->shut_guard_timer.timer);
3421         callout_stop(&asoc->autoclose_timer.timer);
3422         callout_stop(&asoc->delayed_event_timer.timer);
3423
3424         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3425                 callout_stop(&net->fr_timer.timer);
3426                 callout_stop(&net->rxt_timer.timer);
3427                 callout_stop(&net->pmtu_timer.timer);
3428         }
3429         asoc->state = 0;
3430         if (inp->sctp_tcbhash) {
3431                 LIST_REMOVE(stcb, sctp_tcbhash);
3432         }
3433         if (stcb->asoc.in_restart_hash) {
3434                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
3435         }
3436         /* Now lets remove it from the list of ALL associations in the EP */
3437         LIST_REMOVE(stcb, sctp_tcblist);
3438         if (from_inpcbfree == 0) {
3439                 SCTP_INP_INCR_REF(inp);
3440                 SCTP_INP_WUNLOCK(inp);
3441                 SCTP_ITERATOR_UNLOCK();
3442         }
3443         /* pull from vtag hash */
3444         LIST_REMOVE(stcb, sctp_asocs);
3445         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3446
3447         if (from_inpcbfree == 0) {
3448                 SCTP_INP_INFO_WUNLOCK();
3449         }
3450         prev = NULL;
3451         /*
3452          * The chunk lists and such SHOULD be empty but we check them just
3453          * in case.
3454          */
3455         /* anything on the wheel needs to be removed */
3456         for (i = 0; i < asoc->streamoutcnt; i++) {
3457                 struct sctp_stream_out *outs;
3458
3459                 outs = &asoc->strmout[i];
3460                 /* now clean up any chunks here */
3461                 sp = TAILQ_FIRST(&outs->outqueue);
3462                 while (sp) {
3463                         TAILQ_REMOVE(&outs->outqueue, sp, next);
3464                         if (sp->data) {
3465                                 sctp_m_freem(sp->data);
3466                                 sp->data = NULL;
3467                                 sp->tail_mbuf = NULL;
3468                         }
3469                         sctp_free_remote_addr(sp->net);
3470                         sctp_free_spbufspace(stcb, asoc, sp);
3471                         /* Free the zone stuff  */
3472                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3473                         SCTP_DECR_STRMOQ_COUNT();
3474                         sp = TAILQ_FIRST(&outs->outqueue);
3475                 }
3476         }
3477
3478         while ((sp = TAILQ_FIRST(&asoc->free_strmoq)) != NULL) {
3479                 TAILQ_REMOVE(&asoc->free_strmoq, sp, next);
3480                 if (sp->data) {
3481                         sctp_m_freem(sp->data);
3482                         sp->data = NULL;
3483                         sp->tail_mbuf = NULL;
3484                 }
3485                 /* Free the zone stuff  */
3486                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3487                 SCTP_DECR_STRMOQ_COUNT();
3488                 atomic_add_int(&sctppcbinfo.ipi_free_strmoq, -1);
3489         }
3490
3491         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
3492                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
3493                 SCTP_FREE(liste);
3494         }
3495
3496         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3497         while (sq) {
3498                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
3499                 if (sq->data) {
3500                         sctp_m_freem(sq->data);
3501                         sq->data = NULL;
3502                 }
3503                 sctp_free_remote_addr(sq->whoFrom);
3504                 sq->whoFrom = NULL;
3505                 sq->stcb = NULL;
3506                 /* Free the ctl entry */
3507                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3508                 SCTP_DECR_READQ_COUNT();
3509                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3510         }
3511
3512         chk = TAILQ_FIRST(&asoc->free_chunks);
3513         while (chk) {
3514                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
3515                 if (chk->data) {
3516                         sctp_m_freem(chk->data);
3517                         chk->data = NULL;
3518                 }
3519                 ccnt++;
3520                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3521                 SCTP_DECR_CHK_COUNT();
3522                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
3523                 asoc->free_chunk_cnt--;
3524                 chk = TAILQ_FIRST(&asoc->free_chunks);
3525         }
3526         /* pending send queue SHOULD be empty */
3527         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3528                 chk = TAILQ_FIRST(&asoc->send_queue);
3529                 while (chk) {
3530                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3531                         if (chk->data) {
3532                                 sctp_m_freem(chk->data);
3533                                 chk->data = NULL;
3534                         }
3535                         ccnt++;
3536                         sctp_free_remote_addr(chk->whoTo);
3537                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3538                         SCTP_DECR_CHK_COUNT();
3539                         chk = TAILQ_FIRST(&asoc->send_queue);
3540                 }
3541         }
3542 /*
3543   if(ccnt) {
3544   printf("Freed %d from send_queue\n", ccnt);
3545   ccnt = 0;
3546   }
3547 */
3548         /* sent queue SHOULD be empty */
3549         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3550                 chk = TAILQ_FIRST(&asoc->sent_queue);
3551                 while (chk) {
3552                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3553                         if (chk->data) {
3554                                 sctp_m_freem(chk->data);
3555                                 chk->data = NULL;
3556                         }
3557                         ccnt++;
3558                         sctp_free_remote_addr(chk->whoTo);
3559                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3560                         SCTP_DECR_CHK_COUNT();
3561                         chk = TAILQ_FIRST(&asoc->sent_queue);
3562                 }
3563         }
3564 /*
3565   if(ccnt) {
3566   printf("Freed %d from sent_queue\n", ccnt);
3567   ccnt = 0;
3568   }
3569 */
3570         /* control queue MAY not be empty */
3571         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3572                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3573                 while (chk) {
3574                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3575                         if (chk->data) {
3576                                 sctp_m_freem(chk->data);
3577                                 chk->data = NULL;
3578                         }
3579                         ccnt++;
3580                         sctp_free_remote_addr(chk->whoTo);
3581                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3582                         SCTP_DECR_CHK_COUNT();
3583                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3584                 }
3585         }
3586 /*
3587   if(ccnt) {
3588   printf("Freed %d from ctrl_queue\n", ccnt);
3589   ccnt = 0;
3590   }
3591 */
3592         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3593                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3594                 while (chk) {
3595                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3596                         if (chk->data) {
3597                                 sctp_m_freem(chk->data);
3598                                 chk->data = NULL;
3599                         }
3600                         sctp_free_remote_addr(chk->whoTo);
3601                         ccnt++;
3602                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3603                         SCTP_DECR_CHK_COUNT();
3604                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3605                 }
3606         }
3607 /*
3608   if(ccnt) {
3609   printf("Freed %d from reasm_queue\n", ccnt);
3610   ccnt = 0;
3611   }
3612 */
3613         if (asoc->mapping_array) {
3614                 SCTP_FREE(asoc->mapping_array);
3615                 asoc->mapping_array = NULL;
3616         }
3617         /* the stream outs */
3618         if (asoc->strmout) {
3619                 SCTP_FREE(asoc->strmout);
3620                 asoc->strmout = NULL;
3621         }
3622         asoc->streamoutcnt = 0;
3623         if (asoc->strmin) {
3624                 struct sctp_queued_to_read *ctl;
3625                 int i;
3626
3627                 for (i = 0; i < asoc->streamincnt; i++) {
3628                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3629                                 /* We have somethings on the streamin queue */
3630                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3631                                 while (ctl) {
3632                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3633                                             ctl, next);
3634                                         sctp_free_remote_addr(ctl->whoFrom);
3635                                         if (ctl->data) {
3636                                                 sctp_m_freem(ctl->data);
3637                                                 ctl->data = NULL;
3638                                         }
3639                                         /*
3640                                          * We don't free the address here
3641                                          * since all the net's were freed
3642                                          * above.
3643                                          */
3644                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
3645                                         SCTP_DECR_READQ_COUNT();
3646                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3647                                 }
3648                         }
3649                 }
3650                 SCTP_FREE(asoc->strmin);
3651                 asoc->strmin = NULL;
3652         }
3653         asoc->streamincnt = 0;
3654         while (!TAILQ_EMPTY(&asoc->nets)) {
3655                 net = TAILQ_FIRST(&asoc->nets);
3656                 /* pull from list */
3657                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3658 #ifdef INVARIENTS
3659                         panic("no net's left alloc'ed, or list points to itself");
3660 #endif
3661                         break;
3662                 }
3663                 prev = net;
3664                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3665                 sctp_free_remote_addr(net);
3666         }
3667
3668         /* local addresses, if any */
3669         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3670                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3671                 LIST_REMOVE(laddr, sctp_nxt_addr);
3672                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3673                 SCTP_DECR_LADDR_COUNT();
3674         }
3675         /* pending asconf (address) parameters */
3676         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3677                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3678                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3679                 SCTP_FREE(aparam);
3680         }
3681         if (asoc->last_asconf_ack_sent != NULL) {
3682                 sctp_m_freem(asoc->last_asconf_ack_sent);
3683                 asoc->last_asconf_ack_sent = NULL;
3684         }
3685         /* clean up auth stuff */
3686         if (asoc->local_hmacs)
3687                 sctp_free_hmaclist(asoc->local_hmacs);
3688         if (asoc->peer_hmacs)
3689                 sctp_free_hmaclist(asoc->peer_hmacs);
3690
3691         if (asoc->local_auth_chunks)
3692                 sctp_free_chunklist(asoc->local_auth_chunks);
3693         if (asoc->peer_auth_chunks)
3694                 sctp_free_chunklist(asoc->peer_auth_chunks);
3695
3696         sctp_free_authinfo(&asoc->authinfo);
3697
3698         shared_key = LIST_FIRST(&asoc->shared_keys);
3699         while (shared_key) {
3700                 LIST_REMOVE(shared_key, next);
3701                 sctp_free_sharedkey(shared_key);
3702                 shared_key = LIST_FIRST(&asoc->shared_keys);
3703         }
3704
3705         /* Insert new items here :> */
3706
3707         /* Get rid of LOCK */
3708         SCTP_TCB_LOCK_DESTROY(stcb);
3709         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3710         /* now clean up the tasoc itself */
3711         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3712         SCTP_DECR_ASOC_COUNT();
3713
3714         if (from_inpcbfree == 0) {
3715                 SCTP_INP_RLOCK(inp);
3716                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3717                         /*
3718                          * If its NOT the inp_free calling us AND sctp_close
3719                          * as been called, we call back...
3720                          */
3721                         SCTP_INP_RUNLOCK(inp);
3722                         /*
3723                          * This will start the kill timer (if we are the
3724                          * lastone) since we hold an increment yet. But this
3725                          * is the only safe way to do this since otherwise
3726                          * if the socket closes at the same time we are here
3727                          * we might collide in the cleanup.
3728                          */
3729                         sctp_inpcb_free(inp, 0, 0);
3730                         SCTP_INP_DECR_REF(inp);
3731                 } else {
3732                         /* The socket is still open. */
3733                         SCTP_INP_DECR_REF(inp);
3734                         SCTP_INP_RUNLOCK(inp);
3735                 }
3736         }
3737         splx(s);
3738         /* destroyed the asoc */
3739 #ifdef SCTP_LOG_CLOSING
3740         sctp_log_closing(inp, NULL, 11);
3741 #endif
3742         return (1);
3743 }
3744
3745
3746
3747 /*
3748  * determine if a destination is "reachable" based upon the addresses bound
3749  * to the current endpoint (e.g. only v4 or v6 currently bound)
3750  */
3751 /*
3752  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
3753  * assoc level v4/v6 flags, as the assoc *may* not have the same address
3754  * types bound as its endpoint
3755  */
3756 int
3757 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
3758 {
3759         struct sctp_inpcb *inp;
3760         int answer;
3761
3762         /*
3763          * No locks here, the TCB, in all cases is already locked and an
3764          * assoc is up. There is either a INP lock by the caller applied (in
3765          * asconf case when deleting an address) or NOT in the HB case,
3766          * however if HB then the INP increment is up and the INP will not
3767          * be removed (on top of the fact that we have a TCB lock). So we
3768          * only want to read the sctp_flags, which is either bound-all or
3769          * not.. no protection needed since once an assoc is up you can't be
3770          * changing your binding.
3771          */
3772         inp = stcb->sctp_ep;
3773         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3774                 /* if bound all, destination is not restricted */
3775                 /*
3776                  * RRS: Question during lock work: Is this correct? If you
3777                  * are bound-all you still might need to obey the V4--V6
3778                  * flags??? IMO this bound-all stuff needs to be removed!
3779                  */
3780                 return (1);
3781         }
3782         /* NOTE: all "scope" checks are done when local addresses are added */
3783         if (destaddr->sa_family == AF_INET6) {
3784                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
3785         } else if (destaddr->sa_family == AF_INET) {
3786                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
3787         } else {
3788                 /* invalid family, so it's unreachable */
3789                 answer = 0;
3790         }
3791         return (answer);
3792 }
3793
3794 /*
3795  * update the inp_vflags on an endpoint
3796  */
3797 static void
3798 sctp_update_ep_vflag(struct sctp_inpcb *inp)
3799 {
3800         struct sctp_laddr *laddr;
3801
3802         /* first clear the flag */
3803         inp->ip_inp.inp.inp_vflag = 0;
3804         /* set the flag based on addresses on the ep list */
3805         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3806                 if (laddr->ifa == NULL) {
3807 #ifdef SCTP_DEBUG
3808                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3809                                 printf("An ounce of prevention is worth a pound of cure\n");
3810                         }
3811 #endif                          /* SCTP_DEBUG */
3812                         continue;
3813                 }
3814                 if (laddr->ifa->ifa_addr) {
3815                         continue;
3816                 }
3817                 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
3818                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3819                 } else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
3820                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3821                 }
3822         }
3823 }
3824
3825 /*
3826  * Add the address to the endpoint local address list There is nothing to be
3827  * done if we are bound to all addresses
3828  */
3829 int
3830 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3831 {
3832         struct sctp_laddr *laddr;
3833         int fnd, error;
3834
3835         fnd = 0;
3836
3837         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3838                 /* You are already bound to all. You have it already */
3839                 return (0);
3840         }
3841         if (ifa->ifa_addr->sa_family == AF_INET6) {
3842                 struct in6_ifaddr *ifa6;
3843
3844                 ifa6 = (struct in6_ifaddr *)ifa;
3845                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3846                     IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
3847                         /* Can't bind a non-existent addr. */
3848                         return (-1);
3849         }
3850         /* first, is it already present? */
3851         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3852                 if (laddr->ifa == ifa) {
3853                         fnd = 1;
3854                         break;
3855                 }
3856         }
3857
3858         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
3859                 /* Not bound to all */
3860                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
3861                 if (error != 0)
3862                         return (error);
3863                 inp->laddr_count++;
3864                 /* update inp_vflag flags */
3865                 if (ifa->ifa_addr->sa_family == AF_INET6) {
3866                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3867                 } else if (ifa->ifa_addr->sa_family == AF_INET) {
3868                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3869                 }
3870         }
3871         return (0);
3872 }
3873
3874
3875 /*
3876  * select a new (hopefully reachable) destination net (should only be used
3877  * when we deleted an ep addr that is the only usable source address to reach
3878  * the destination net)
3879  */
3880 static void
3881 sctp_select_primary_destination(struct sctp_tcb *stcb)
3882 {
3883         struct sctp_nets *net;
3884
3885         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3886                 /* for now, we'll just pick the first reachable one we find */
3887                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
3888                         continue;
3889                 if (sctp_destination_is_reachable(stcb,
3890                     (struct sockaddr *)&net->ro._l_addr)) {
3891                         /* found a reachable destination */
3892                         stcb->asoc.primary_destination = net;
3893                 }
3894         }
3895         /* I can't there from here! ...we're gonna die shortly... */
3896 }
3897
3898
3899 /*
3900  * Delete the address from the endpoint local address list There is nothing
3901  * to be done if we are bound to all addresses
3902  */
3903 int
3904 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3905 {
3906         struct sctp_laddr *laddr;
3907         int fnd;
3908
3909         fnd = 0;
3910         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3911                 /* You are already bound to all. You have it already */
3912                 return (EINVAL);
3913         }
3914         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3915                 if (laddr->ifa == ifa) {
3916                         fnd = 1;
3917                         break;
3918                 }
3919         }
3920         if (fnd && (inp->laddr_count < 2)) {
3921                 /* can't delete unless there are at LEAST 2 addresses */
3922                 return (-1);
3923         }
3924         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
3925                 /*
3926                  * clean up any use of this address go through our
3927                  * associations and clear any last_used_address that match
3928                  * this one for each assoc, see if a new primary_destination
3929                  * is needed
3930                  */
3931                 struct sctp_tcb *stcb;
3932
3933                 /* clean up "next_addr_touse" */
3934                 if (inp->next_addr_touse == laddr)
3935                         /* delete this address */
3936                         inp->next_addr_touse = NULL;
3937
3938                 /* clean up "last_used_address" */
3939                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3940                         if (stcb->asoc.last_used_address == laddr)
3941                                 /* delete this address */
3942                                 stcb->asoc.last_used_address = NULL;
3943                 }               /* for each tcb */
3944
3945                 /* remove it from the ep list */
3946                 sctp_remove_laddr(laddr);
3947                 inp->laddr_count--;
3948                 /* update inp_vflag flags */
3949                 sctp_update_ep_vflag(inp);
3950                 /* select a new primary destination if needed */
3951                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3952                         /*
3953                          * presume caller (sctp_asconf.c) already owns INP
3954                          * lock
3955                          */
3956                         SCTP_TCB_LOCK(stcb);
3957                         if (sctp_destination_is_reachable(stcb,
3958                             (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr) == 0) {
3959                                 sctp_select_primary_destination(stcb);
3960                         }
3961                         SCTP_TCB_UNLOCK(stcb);
3962                 }               /* for each tcb */
3963         }
3964         return (0);
3965 }
3966
3967 /*
3968  * Add the addr to the TCB local address list For the BOUNDALL or dynamic
3969  * case, this is a "pending" address list (eg. addresses waiting for an
3970  * ASCONF-ACK response) For the subset binding, static case, this is a
3971  * "valid" address list
3972  */
3973 int
3974 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3975 {
3976         struct sctp_inpcb *inp;
3977         struct sctp_laddr *laddr;
3978         int error;
3979
3980         /*
3981          * Assumes TCP is locked.. and possiblye the INP. May need to
3982          * confirm/fix that if we need it and is not the case.
3983          */
3984         inp = stcb->sctp_ep;
3985         if (ifa->ifa_addr->sa_family == AF_INET6) {
3986                 struct in6_ifaddr *ifa6;
3987
3988                 ifa6 = (struct in6_ifaddr *)ifa;
3989                 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3990                 /* IN6_IFF_DEPRECATED | */
3991                     IN6_IFF_ANYCAST |
3992                     IN6_IFF_NOTREADY))
3993                         /* Can't bind a non-existent addr. */
3994                         return (-1);
3995         }
3996         /* does the address already exist? */
3997         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3998                 if (laddr->ifa == ifa) {
3999                         return (-1);
4000                 }
4001         }
4002
4003         /* add to the list */
4004         error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
4005         if (error != 0)
4006                 return (error);
4007         return (0);
4008 }
4009
4010 /*
4011  * insert an laddr entry with the given ifa for the desired list
4012  */
4013 int
4014 sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa)
4015 {
4016         struct sctp_laddr *laddr;
4017         int s;
4018
4019         s = splnet();
4020
4021         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
4022         if (laddr == NULL) {
4023                 /* out of memory? */
4024                 splx(s);
4025                 return (EINVAL);
4026         }
4027         SCTP_INCR_LADDR_COUNT();
4028         bzero(laddr, sizeof(*laddr));
4029         laddr->ifa = ifa;
4030         /* insert it */
4031         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4032
4033         splx(s);
4034         return (0);
4035 }
4036
4037 /*
4038  * Remove an laddr entry from the local address list (on an assoc)
4039  */
4040 void
4041 sctp_remove_laddr(struct sctp_laddr *laddr)
4042 {
4043         int s;
4044
4045         s = splnet();
4046         /* remove from the list */
4047         LIST_REMOVE(laddr, sctp_nxt_addr);
4048         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4049         SCTP_DECR_LADDR_COUNT();
4050         splx(s);
4051 }
4052
4053 /*
4054  * Remove an address from the TCB local address list
4055  */
4056 int
4057 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
4058 {
4059         struct sctp_inpcb *inp;
4060         struct sctp_laddr *laddr;
4061
4062         /*
4063          * This is called by asconf work. It is assumed that a) The TCB is
4064          * locked and b) The INP is locked. This is true in as much as I can
4065          * trace through the entry asconf code where I did these locks.
4066          * Again, the ASCONF code is a bit different in that it does lock
4067          * the INP during its work often times. This must be since we don't
4068          * want other proc's looking up things while what they are looking
4069          * up is changing :-D
4070          */
4071
4072         inp = stcb->sctp_ep;
4073         /* if subset bound and don't allow ASCONF's, can't delete last */
4074         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4075             (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4076                 if (stcb->asoc.numnets < 2) {
4077                         /* can't delete last address */
4078                         return (-1);
4079                 }
4080         }
4081         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4082                 /* remove the address if it exists */
4083                 if (laddr->ifa == NULL)
4084                         continue;
4085                 if (laddr->ifa == ifa) {
4086                         sctp_remove_laddr(laddr);
4087                         return (0);
4088                 }
4089         }
4090
4091         /* address not found! */
4092         return (-1);
4093 }
4094
4095 /*
4096  * Remove an address from the TCB local address list lookup using a sockaddr
4097  * addr
4098  */
4099 int
4100 sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
4101 {
4102         struct sctp_inpcb *inp;
4103         struct sctp_laddr *laddr;
4104         struct sockaddr *l_sa;
4105
4106         /*
4107          * This function I find does not seem to have a caller. As such we
4108          * NEED TO DELETE this code. If we do find a caller, the caller MUST
4109          * have locked the TCB at the least and probably the INP as well.
4110          */
4111         inp = stcb->sctp_ep;
4112         /* if subset bound and don't allow ASCONF's, can't delete last */
4113         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4114             (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4115                 if (stcb->asoc.numnets < 2) {
4116                         /* can't delete last address */
4117                         return (-1);
4118                 }
4119         }
4120         LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4121                 /* make sure the address exists */
4122                 if (laddr->ifa == NULL)
4123                         continue;
4124                 if (laddr->ifa->ifa_addr == NULL)
4125                         continue;
4126
4127                 l_sa = laddr->ifa->ifa_addr;
4128                 if (l_sa->sa_family == AF_INET6) {
4129                         /* IPv6 address */
4130                         struct sockaddr_in6 *sin1, *sin2;
4131
4132                         sin1 = (struct sockaddr_in6 *)l_sa;
4133                         sin2 = (struct sockaddr_in6 *)sa;
4134                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4135                             sizeof(struct in6_addr)) == 0) {
4136                                 /* matched */
4137                                 sctp_remove_laddr(laddr);
4138                                 return (0);
4139                         }
4140                 } else if (l_sa->sa_family == AF_INET) {
4141                         /* IPv4 address */
4142                         struct sockaddr_in *sin1, *sin2;
4143
4144                         sin1 = (struct sockaddr_in *)l_sa;
4145                         sin2 = (struct sockaddr_in *)sa;
4146                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4147                                 /* matched */
4148                                 sctp_remove_laddr(laddr);
4149                                 return (0);
4150                         }
4151                 } else {
4152                         /* invalid family */
4153                         return (-1);
4154                 }
4155         }                       /* end foreach */
4156         /* address not found! */
4157         return (-1);
4158 }
4159
4160 static char sctp_pcb_initialized = 0;
4161
4162 /*
4163  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
4164  */
4165 /* sysctl */
4166 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4167 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4168
4169
4170 void
4171 sctp_pcb_init()
4172 {
4173         /*
4174          * SCTP initialization for the PCB structures should be called by
4175          * the sctp_init() funciton.
4176          */
4177         int i;
4178
4179         if (sctp_pcb_initialized != 0) {
4180                 /* error I was called twice */
4181                 return;
4182         }
4183         sctp_pcb_initialized = 1;
4184
4185         bzero(&sctpstat, sizeof(struct sctpstat));
4186
4187         /* init the empty list of (All) Endpoints */
4188         LIST_INIT(&sctppcbinfo.listhead);
4189
4190         /* init the iterator head */
4191         LIST_INIT(&sctppcbinfo.iteratorhead);
4192
4193         /* init the hash table of endpoints */
4194         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
4195         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4196         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4197
4198         sctppcbinfo.sctp_asochash = hashinit((sctp_hashtblsize * 31),
4199             M_PCB,
4200             &sctppcbinfo.hashasocmark);
4201
4202         sctppcbinfo.sctp_ephash = hashinit(sctp_hashtblsize,
4203             M_PCB,
4204             &sctppcbinfo.hashmark);
4205
4206         sctppcbinfo.sctp_tcpephash = hashinit(sctp_hashtblsize,
4207             M_PCB,
4208             &sctppcbinfo.hashtcpmark);
4209
4210         sctppcbinfo.hashtblsize = sctp_hashtblsize;
4211
4212         /*
4213          * init the small hash table we use to track restarted asoc's
4214          */
4215         sctppcbinfo.sctp_restarthash = hashinit(SCTP_STACK_VTAG_HASH_SIZE,
4216             M_PCB,
4217             &sctppcbinfo.hashrestartmark);
4218
4219         /* init the zones */
4220         /*
4221          * FIX ME: Should check for NULL returns, but if it does fail we are
4222          * doomed to panic anyways... add later maybe.
4223          */
4224         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4225             sizeof(struct sctp_inpcb), maxsockets);
4226
4227         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4228             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4229
4230         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4231             sizeof(struct sctp_laddr),
4232             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4233
4234         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4235             sizeof(struct sctp_nets),
4236             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4237
4238         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4239             sizeof(struct sctp_tmit_chunk),
4240             (sctp_max_number_of_assoc * sctp_chunkscale));
4241
4242         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
4243             sizeof(struct sctp_queued_to_read),
4244             (sctp_max_number_of_assoc * sctp_chunkscale));
4245
4246         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
4247             sizeof(struct sctp_stream_queue_pending),
4248             (sctp_max_number_of_assoc * sctp_chunkscale));
4249
4250         /* Master Lock INIT for info structure */
4251         SCTP_INP_INFO_LOCK_INIT();
4252         SCTP_STATLOG_INIT_LOCK();
4253         SCTP_ITERATOR_LOCK_INIT();
4254         SCTP_IPI_COUNT_INIT();
4255         SCTP_IPI_ADDR_INIT();
4256         LIST_INIT(&sctppcbinfo.addr_wq);
4257
4258         /* not sure if we need all the counts */
4259         sctppcbinfo.ipi_count_ep = 0;
4260         /* assoc/tcb zone info */
4261         sctppcbinfo.ipi_count_asoc = 0;
4262         /* local addrlist zone info */
4263         sctppcbinfo.ipi_count_laddr = 0;
4264         /* remote addrlist zone info */
4265         sctppcbinfo.ipi_count_raddr = 0;
4266         /* chunk info */
4267         sctppcbinfo.ipi_count_chunk = 0;
4268
4269         /* socket queue zone info */
4270         sctppcbinfo.ipi_count_readq = 0;
4271
4272         /* stream out queue cont */
4273         sctppcbinfo.ipi_count_strmoq = 0;
4274
4275         sctppcbinfo.ipi_free_strmoq = 0;
4276         sctppcbinfo.ipi_free_chunks = 0;
4277
4278
4279         callout_init(&sctppcbinfo.addr_wq_timer.timer, 1);
4280
4281         /* port stuff */
4282         sctppcbinfo.lastlow = ipport_firstauto;
4283         /* Init the TIMEWAIT list */
4284         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4285                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4286         }
4287
4288 }
4289
4290
4291 int
4292 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4293     int iphlen, int offset, int limit, struct sctphdr *sh,
4294     struct sockaddr *altsa)
4295 {
4296         /*
4297          * grub through the INIT pulling addresses and loading them to the
4298          * nets structure in the asoc. The from address in the mbuf should
4299          * also be loaded (if it is not already). This routine can be called
4300          * with either INIT or INIT-ACK's as long as the m points to the IP
4301          * packet and the offset points to the beginning of the parameters.
4302          */
4303         struct sctp_inpcb *inp, *l_inp;
4304         struct sctp_nets *net, *net_tmp;
4305         struct ip *iph;
4306         struct sctp_paramhdr *phdr, parm_buf;
4307         struct sctp_tcb *stcb_tmp;
4308         uint16_t ptype, plen;
4309         struct sockaddr *sa;
4310         struct sockaddr_storage dest_store;
4311         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4312         struct sockaddr_in sin;
4313         struct sockaddr_in6 sin6;
4314         uint8_t store[384];
4315         struct sctp_auth_random *random = NULL;
4316         uint16_t random_len = 0;
4317         struct sctp_auth_hmac_algo *hmacs = NULL;
4318         uint16_t hmacs_len = 0;
4319         struct sctp_auth_chunk_list *chunks = NULL;
4320         uint16_t num_chunks = 0;
4321         sctp_key_t *new_key;
4322         uint32_t keylen;
4323         int got_random = 0, got_hmacs = 0, got_chklist = 0;
4324
4325         /* First get the destination address setup too. */
4326         memset(&sin, 0, sizeof(sin));
4327         memset(&sin6, 0, sizeof(sin6));
4328
4329         sin.sin_family = AF_INET;
4330         sin.sin_len = sizeof(sin);
4331         sin.sin_port = stcb->rport;
4332
4333         sin6.sin6_family = AF_INET6;
4334         sin6.sin6_len = sizeof(struct sockaddr_in6);
4335         sin6.sin6_port = stcb->rport;
4336         if (altsa == NULL) {
4337                 iph = mtod(m, struct ip *);
4338                 if (iph->ip_v == IPVERSION) {
4339                         /* its IPv4 */
4340                         struct sockaddr_in *sin_2;
4341
4342                         sin_2 = (struct sockaddr_in *)(local_sa);
4343                         memset(sin_2, 0, sizeof(sin));
4344                         sin_2->sin_family = AF_INET;
4345                         sin_2->sin_len = sizeof(sin);
4346                         sin_2->sin_port = sh->dest_port;
4347                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
4348                         sin.sin_addr = iph->ip_src;
4349                         sa = (struct sockaddr *)&sin;
4350                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4351                         /* its IPv6 */
4352                         struct ip6_hdr *ip6;
4353                         struct sockaddr_in6 *sin6_2;
4354
4355                         ip6 = mtod(m, struct ip6_hdr *);
4356                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4357                         memset(sin6_2, 0, sizeof(sin6));
4358                         sin6_2->sin6_family = AF_INET6;
4359                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4360                         sin6_2->sin6_port = sh->dest_port;
4361                         sin6.sin6_addr = ip6->ip6_src;
4362                         sa = (struct sockaddr *)&sin6;
4363                 } else {
4364                         sa = NULL;
4365                 }
4366         } else {
4367                 /*
4368                  * For cookies we use the src address NOT from the packet
4369                  * but from the original INIT
4370                  */
4371                 sa = altsa;
4372         }
4373         /* Turn off ECN until we get through all params */
4374         stcb->asoc.ecn_allowed = 0;
4375         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4376                 /* mark all addresses that we have currently on the list */
4377                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4378         }
4379         /* does the source address already exist? if so skip it */
4380         l_inp = inp = stcb->sctp_ep;
4381
4382         atomic_add_int(&stcb->asoc.refcnt, 1);
4383         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4384         atomic_add_int(&stcb->asoc.refcnt, -1);
4385
4386         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4387                 /* we must add the source address */
4388                 /* no scope set here since we have a tcb already. */
4389                 if ((sa->sa_family == AF_INET) &&
4390                     (stcb->asoc.ipv4_addr_legal)) {
4391                         if (sctp_add_remote_addr(stcb, sa, 0, 2)) {
4392                                 return (-1);
4393                         }
4394                 } else if ((sa->sa_family == AF_INET6) &&
4395                     (stcb->asoc.ipv6_addr_legal)) {
4396                         if (sctp_add_remote_addr(stcb, sa, 0, 3)) {
4397                                 return (-2);
4398                         }
4399                 }
4400         } else {
4401                 if (net_tmp != NULL && stcb_tmp == stcb) {
4402                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4403                 } else if (stcb_tmp != stcb) {
4404                         /* It belongs to another association? */
4405                         SCTP_TCB_UNLOCK(stcb_tmp);
4406                         return (-3);
4407                 }
4408         }
4409         if (stcb->asoc.state == 0) {
4410                 /* the assoc was freed? */
4411                 return (-4);
4412         }
4413         /* now we must go through each of the params. */
4414         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4415         while (phdr) {
4416                 ptype = ntohs(phdr->param_type);
4417                 plen = ntohs(phdr->param_length);
4418                 /*
4419                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
4420                  * (int)plen);
4421                  */
4422                 if (offset + plen > limit) {
4423                         break;
4424                 }
4425                 if (plen == 0) {
4426                         break;
4427                 }
4428                 if (ptype == SCTP_IPV4_ADDRESS) {
4429                         if (stcb->asoc.ipv4_addr_legal) {
4430                                 struct sctp_ipv4addr_param *p4, p4_buf;
4431
4432                                 /* ok get the v4 address and check/add */
4433                                 phdr = sctp_get_next_param(m, offset,
4434                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4435                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4436                                     phdr == NULL) {
4437                                         return (-5);
4438                                 }
4439                                 p4 = (struct sctp_ipv4addr_param *)phdr;
4440                                 sin.sin_addr.s_addr = p4->addr;
4441                                 sa = (struct sockaddr *)&sin;
4442                                 inp = stcb->sctp_ep;
4443                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4444                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4445                                     local_sa, stcb);
4446                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4447
4448                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
4449                                     inp == NULL) {
4450                                         /* we must add the source address */
4451                                         /*
4452                                          * no scope set since we have a tcb
4453                                          * already
4454                                          */
4455
4456                                         /*
4457                                          * we must validate the state again
4458                                          * here
4459                                          */
4460                                         if (stcb->asoc.state == 0) {
4461                                                 /* the assoc was freed? */
4462                                                 return (-7);
4463                                         }
4464                                         if (sctp_add_remote_addr(stcb, sa, 0, 4)) {
4465                                                 return (-8);
4466                                         }
4467                                 } else if (stcb_tmp == stcb) {
4468                                         if (stcb->asoc.state == 0) {
4469                                                 /* the assoc was freed? */
4470                                                 return (-10);
4471                                         }
4472                                         if (net != NULL) {
4473                                                 /* clear flag */
4474                                                 net->dest_state &=
4475                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4476                                         }
4477                                 } else {
4478                                         /*
4479                                          * strange, address is in another
4480                                          * assoc? straighten out locks.
4481                                          */
4482                                         if (stcb->asoc.state == 0) {
4483                                                 /* the assoc was freed? */
4484                                                 return (-12);
4485                                         }
4486                                         return (-13);
4487                                 }
4488                         }
4489                 } else if (ptype == SCTP_IPV6_ADDRESS) {
4490                         if (stcb->asoc.ipv6_addr_legal) {
4491                                 /* ok get the v6 address and check/add */
4492                                 struct sctp_ipv6addr_param *p6, p6_buf;
4493
4494                                 phdr = sctp_get_next_param(m, offset,
4495                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4496                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4497                                     phdr == NULL) {
4498                                         return (-14);
4499                                 }
4500                                 p6 = (struct sctp_ipv6addr_param *)phdr;
4501                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4502                                     sizeof(p6->addr));
4503                                 sa = (struct sockaddr *)&sin6;
4504                                 inp = stcb->sctp_ep;
4505                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4506                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4507                                     local_sa, stcb);
4508                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4509                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4510                                     inp == NULL)) {
4511                                         /*
4512                                          * we must validate the state again
4513                                          * here
4514                                          */
4515                                         if (stcb->asoc.state == 0) {
4516                                                 /* the assoc was freed? */
4517                                                 return (-16);
4518                                         }
4519                                         /*
4520                                          * we must add the address, no scope
4521                                          * set
4522                                          */
4523                                         if (sctp_add_remote_addr(stcb, sa, 0, 5)) {
4524                                                 return (-17);
4525                                         }
4526                                 } else if (stcb_tmp == stcb) {
4527                                         /*
4528                                          * we must validate the state again
4529                                          * here
4530                                          */
4531                                         if (stcb->asoc.state == 0) {
4532                                                 /* the assoc was freed? */
4533                                                 return (-19);
4534                                         }
4535                                         if (net != NULL) {
4536                                                 /* clear flag */
4537                                                 net->dest_state &=
4538                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4539                                         }
4540                                 } else {
4541                                         /*
4542                                          * strange, address is in another
4543                                          * assoc? straighten out locks.
4544                                          */
4545                                         if (stcb->asoc.state == 0) {
4546                                                 /* the assoc was freed? */
4547                                                 return (-21);
4548                                         }
4549                                         return (-22);
4550                                 }
4551                         }
4552                 } else if (ptype == SCTP_ECN_CAPABLE) {
4553                         stcb->asoc.ecn_allowed = 1;
4554                 } else if (ptype == SCTP_ULP_ADAPTATION) {
4555                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
4556                                 struct sctp_adaptation_layer_indication ai,
4557                                                                 *aip;
4558
4559                                 phdr = sctp_get_next_param(m, offset,
4560                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
4561                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
4562                                 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION,
4563                                     stcb, ntohl(aip->indication), NULL);
4564                         }
4565                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4566                         struct sctp_asconf_addr_param lstore, *fee;
4567                         struct sctp_asconf_addrv4_param *fii;
4568                         int lptype;
4569                         struct sockaddr *lsa = NULL;
4570
4571                         stcb->asoc.peer_supports_asconf = 1;
4572                         if (plen > sizeof(lstore)) {
4573                                 return (-23);
4574                         }
4575                         phdr = sctp_get_next_param(m, offset,
4576                             (struct sctp_paramhdr *)&lstore, plen);
4577                         if (phdr == NULL) {
4578                                 return (-24);
4579                         }
4580                         fee = (struct sctp_asconf_addr_param *)phdr;
4581                         lptype = ntohs(fee->addrp.ph.param_type);
4582                         if (lptype == SCTP_IPV4_ADDRESS) {
4583                                 if (plen !=
4584                                     sizeof(struct sctp_asconf_addrv4_param)) {
4585                                         printf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4586                                             (int)sizeof(struct sctp_asconf_addrv4_param),
4587                                             plen);
4588                                 } else {
4589                                         fii = (struct sctp_asconf_addrv4_param *)fee;
4590                                         sin.sin_addr.s_addr = fii->addrp.addr;
4591                                         lsa = (struct sockaddr *)&sin;
4592                                 }
4593                         } else if (lptype == SCTP_IPV6_ADDRESS) {
4594                                 if (plen !=
4595                                     sizeof(struct sctp_asconf_addr_param)) {
4596                                         printf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4597                                             (int)sizeof(struct sctp_asconf_addr_param),
4598                                             plen);
4599                                 } else {
4600                                         memcpy(sin6.sin6_addr.s6_addr,
4601                                             fee->addrp.addr,
4602                                             sizeof(fee->addrp.addr));
4603                                         lsa = (struct sockaddr *)&sin6;
4604                                 }
4605                         }
4606                         if (lsa) {
4607                                 sctp_set_primary_addr(stcb, sa, NULL);
4608                         }
4609                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4610                         /* Peer supports pr-sctp */
4611                         stcb->asoc.peer_supports_prsctp = 1;
4612                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4613                         /* A supported extension chunk */
4614                         struct sctp_supported_chunk_types_param *pr_supported;
4615                         uint8_t local_store[128];
4616                         int num_ent, i;
4617
4618                         phdr = sctp_get_next_param(m, offset,
4619                             (struct sctp_paramhdr *)&local_store, plen);
4620                         if (phdr == NULL) {
4621                                 return (-25);
4622                         }
4623                         stcb->asoc.peer_supports_asconf = 0;
4624                         stcb->asoc.peer_supports_prsctp = 0;
4625                         stcb->asoc.peer_supports_pktdrop = 0;
4626                         stcb->asoc.peer_supports_strreset = 0;
4627                         stcb->asoc.peer_supports_auth = 0;
4628                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4629                         num_ent = plen - sizeof(struct sctp_paramhdr);
4630                         for (i = 0; i < num_ent; i++) {
4631                                 switch (pr_supported->chunk_types[i]) {
4632                                 case SCTP_ASCONF:
4633                                 case SCTP_ASCONF_ACK:
4634                                         stcb->asoc.peer_supports_asconf = 1;
4635                                         break;
4636                                 case SCTP_FORWARD_CUM_TSN:
4637                                         stcb->asoc.peer_supports_prsctp = 1;
4638                                         break;
4639                                 case SCTP_PACKET_DROPPED:
4640                                         stcb->asoc.peer_supports_pktdrop = 1;
4641                                         break;
4642                                 case SCTP_STREAM_RESET:
4643                                         stcb->asoc.peer_supports_strreset = 1;
4644                                         break;
4645                                 case SCTP_AUTHENTICATION:
4646                                         stcb->asoc.peer_supports_auth = 1;
4647                                         break;
4648                                 default:
4649                                         /* one I have not learned yet */
4650                                         break;
4651
4652                                 }
4653                         }
4654                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4655                         /* Peer supports ECN-nonce */
4656                         stcb->asoc.peer_supports_ecn_nonce = 1;
4657                         stcb->asoc.ecn_nonce_allowed = 1;
4658                 } else if (ptype == SCTP_RANDOM) {
4659                         if (plen > sizeof(store))
4660                                 break;
4661                         if (got_random) {
4662                                 /* already processed a RANDOM */
4663                                 goto next_param;
4664                         }
4665                         phdr = sctp_get_next_param(m, offset,
4666                             (struct sctp_paramhdr *)store,
4667                             plen);
4668                         if (phdr == NULL)
4669                                 return (-26);
4670                         random = (struct sctp_auth_random *)phdr;
4671                         random_len = plen - sizeof(*random);
4672                         /* enforce the random length */
4673                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
4674 #ifdef SCTP_DEBUG
4675                                 if (sctp_debug_on & SCTP_DEBUG_AUTH1)
4676                                         printf("SCTP: invalid RANDOM len\n");
4677 #endif
4678                                 return (-27);
4679                         }
4680                         got_random = 1;
4681                 } else if (ptype == SCTP_HMAC_LIST) {
4682                         int num_hmacs;
4683                         int i;
4684
4685                         if (plen > sizeof(store))
4686                                 break;
4687                         if (got_hmacs) {
4688                                 /* already processed a HMAC list */
4689                                 goto next_param;
4690                         }
4691                         phdr = sctp_get_next_param(m, offset,
4692                             (struct sctp_paramhdr *)store,
4693                             plen);
4694                         if (phdr == NULL)
4695                                 return (-28);
4696                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
4697                         hmacs_len = plen - sizeof(*hmacs);
4698                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
4699                         /* validate the hmac list */
4700                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
4701                                 return (-29);
4702                         }
4703                         if (stcb->asoc.peer_hmacs != NULL)
4704                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
4705                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
4706                         if (stcb->asoc.peer_hmacs != NULL) {
4707                                 for (i = 0; i < num_hmacs; i++) {
4708                                         sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
4709                                             ntohs(hmacs->hmac_ids[i]));
4710                                 }
4711                         }
4712                         got_hmacs = 1;
4713                 } else if (ptype == SCTP_CHUNK_LIST) {
4714                         int i;
4715
4716                         if (plen > sizeof(store))
4717                                 break;
4718                         if (got_chklist) {
4719                                 /* already processed a Chunks list */
4720                                 goto next_param;
4721                         }
4722                         phdr = sctp_get_next_param(m, offset,
4723                             (struct sctp_paramhdr *)store,
4724                             plen);
4725                         if (phdr == NULL)
4726                                 return (-30);
4727                         chunks = (struct sctp_auth_chunk_list *)phdr;
4728                         num_chunks = plen - sizeof(*chunks);
4729                         if (stcb->asoc.peer_auth_chunks != NULL)
4730                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
4731                         else
4732                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
4733                         for (i = 0; i < num_chunks; i++) {
4734                                 sctp_auth_add_chunk(chunks->chunk_types[i],
4735                                     stcb->asoc.peer_auth_chunks);
4736                         }
4737                         got_chklist = 1;
4738                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4739                             (ptype == SCTP_STATE_COOKIE) ||
4740                             (ptype == SCTP_UNRECOG_PARAM) ||
4741                             (ptype == SCTP_COOKIE_PRESERVE) ||
4742                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4743                             (ptype == SCTP_ADD_IP_ADDRESS) ||
4744                             (ptype == SCTP_DEL_IP_ADDRESS) ||
4745                             (ptype == SCTP_ERROR_CAUSE_IND) ||
4746                     (ptype == SCTP_SUCCESS_REPORT)) {
4747                          /* don't care */ ;
4748                 } else {
4749                         if ((ptype & 0x8000) == 0x0000) {
4750                                 /*
4751                                  * must stop processing the rest of the
4752                                  * param's. Any report bits were handled
4753                                  * with the call to
4754                                  * sctp_arethere_unrecognized_parameters()
4755                                  * when the INIT or INIT-ACK was first seen.
4756                                  */
4757                                 break;
4758                         }
4759                 }
4760 next_param:
4761                 offset += SCTP_SIZE32(plen);
4762                 if (offset >= limit) {
4763                         break;
4764                 }
4765                 phdr = sctp_get_next_param(m, offset, &parm_buf,
4766                     sizeof(parm_buf));
4767         }
4768         /* Now check to see if we need to purge any addresses */
4769         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
4770                 net_tmp = TAILQ_NEXT(net, sctp_next);
4771                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
4772                     SCTP_ADDR_NOT_IN_ASSOC) {
4773                         /* This address has been removed from the asoc */
4774                         /* remove and free it */
4775                         stcb->asoc.numnets--;
4776                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
4777                         sctp_free_remote_addr(net);
4778                         if (net == stcb->asoc.primary_destination) {
4779                                 stcb->asoc.primary_destination = NULL;
4780                                 sctp_select_primary_destination(stcb);
4781                         }
4782                 }
4783         }
4784         /* validate authentication required parameters */
4785         if (got_random && got_hmacs) {
4786                 stcb->asoc.peer_supports_auth = 1;
4787         } else {
4788                 stcb->asoc.peer_supports_auth = 0;
4789         }
4790         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
4791             !stcb->asoc.peer_supports_auth) {
4792                 return (-31);
4793         }
4794         /* concatenate the full random key */
4795         keylen = random_len + num_chunks + hmacs_len;
4796         new_key = sctp_alloc_key(keylen);
4797         if (new_key != NULL) {
4798                 /* copy in the RANDOM */
4799                 if (random != NULL)
4800                         bcopy(random->random_data, new_key->key, random_len);
4801                 /* append in the AUTH chunks */
4802                 if (chunks != NULL)
4803                         bcopy(chunks->chunk_types, new_key->key + random_len,
4804                             num_chunks);
4805                 /* append in the HMACs */
4806                 if (hmacs != NULL)
4807                         bcopy(hmacs->hmac_ids, new_key->key + random_len + num_chunks,
4808                             hmacs_len);
4809         } else {
4810                 return (-32);
4811         }
4812         if (stcb->asoc.authinfo.peer_random != NULL)
4813                 sctp_free_key(stcb->asoc.authinfo.peer_random);
4814         stcb->asoc.authinfo.peer_random = new_key;
4815 #ifdef SCTP_AUTH_DRAFT_04
4816         /* don't include the chunks and hmacs for draft -04 */
4817         stcb->asoc.authinfo.peer_random->keylen = random_len;
4818 #endif
4819         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
4820         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
4821
4822         return (0);
4823 }
4824
4825 int
4826 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
4827     struct sctp_nets *net)
4828 {
4829         /* make sure the requested primary address exists in the assoc */
4830         if (net == NULL && sa)
4831                 net = sctp_findnet(stcb, sa);
4832
4833         if (net == NULL) {
4834                 /* didn't find the requested primary address! */
4835                 return (-1);
4836         } else {
4837                 /* set the primary address */
4838                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
4839                         /* Must be confirmed */
4840                         return (-1);
4841                 }
4842                 stcb->asoc.primary_destination = net;
4843                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
4844                 net = TAILQ_FIRST(&stcb->asoc.nets);
4845                 if (net != stcb->asoc.primary_destination) {
4846                         /*
4847                          * first one on the list is NOT the primary
4848                          * sctp_cmpaddr() is much more efficent if the
4849                          * primary is the first on the list, make it so.
4850                          */
4851                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
4852                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
4853                 }
4854                 return (0);
4855         }
4856 }
4857
4858
4859 int
4860 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now)
4861 {
4862         /*
4863          * This function serves two purposes. It will see if a TAG can be
4864          * re-used and return 1 for yes it is ok and 0 for don't use that
4865          * tag. A secondary function it will do is purge out old tags that
4866          * can be removed.
4867          */
4868         struct sctpasochead *head;
4869         struct sctpvtaghead *chain;
4870         struct sctp_tagblock *twait_block;
4871         struct sctp_tcb *stcb;
4872         int i;
4873
4874         SCTP_INP_INFO_WLOCK();
4875         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4876         /* First is the vtag in use ? */
4877
4878         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
4879             sctppcbinfo.hashasocmark)];
4880         if (head == NULL) {
4881                 goto check_restart;
4882         }
4883         LIST_FOREACH(stcb, head, sctp_asocs) {
4884
4885                 if (stcb->asoc.my_vtag == tag) {
4886                         /*
4887                          * We should remove this if and return 0 always if
4888                          * we want vtags unique across all endpoints. For
4889                          * now within a endpoint is ok.
4890                          */
4891                         if (inp == stcb->sctp_ep) {
4892                                 /* bad tag, in use */
4893                                 SCTP_INP_INFO_WUNLOCK();
4894                                 return (0);
4895                         }
4896                 }
4897         }
4898 check_restart:
4899         /* Now lets check the restart hash */
4900         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
4901             sctppcbinfo.hashrestartmark)];
4902         if (head == NULL) {
4903                 goto check_time_wait;
4904         }
4905         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
4906                 if (stcb->asoc.assoc_id == tag) {
4907                         /* candidate */
4908                         if (inp == stcb->sctp_ep) {
4909                                 /* bad tag, in use */
4910                                 SCTP_INP_INFO_WUNLOCK();
4911                                 return (0);
4912                         }
4913                 }
4914         }
4915 check_time_wait:
4916         /* Now what about timed wait ? */
4917         if (!LIST_EMPTY(chain)) {
4918                 /*
4919                  * Block(s) are present, lets see if we have this tag in the
4920                  * list
4921                  */
4922                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4923                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4924                                 if (twait_block->vtag_block[i].v_tag == 0) {
4925                                         /* not used */
4926                                         continue;
4927                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
4928                                     now->tv_sec) {
4929                                         /* Audit expires this guy */
4930                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4931                                         twait_block->vtag_block[i].v_tag = 0;
4932                                 } else if (twait_block->vtag_block[i].v_tag ==
4933                                     tag) {
4934                                         /* Bad tag, sorry :< */
4935                                         SCTP_INP_INFO_WUNLOCK();
4936                                         return (0);
4937                                 }
4938                         }
4939                 }
4940         }
4941         /* Not found, ok to use the tag */
4942         SCTP_INP_INFO_WUNLOCK();
4943         return (1);
4944 }
4945
4946
4947 /*
4948  * Delete the address from the endpoint local address list Lookup using a
4949  * sockaddr address (ie. not an ifaddr)
4950  */
4951 int
4952 sctp_del_local_addr_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa)
4953 {
4954         struct sctp_laddr *laddr;
4955         struct sockaddr *l_sa;
4956         int found = 0;
4957
4958         /*
4959          * Here is another function I cannot find a caller for. As such we
4960          * SHOULD delete it if we have no users. If we find a user that user
4961          * MUST have the INP locked.
4962          *
4963          */
4964
4965         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4966                 /* You are already bound to all. You have it already */
4967                 return (EINVAL);
4968         }
4969         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4970                 /* make sure the address exists */
4971                 if (laddr->ifa == NULL)
4972                         continue;
4973                 if (laddr->ifa->ifa_addr == NULL)
4974                         continue;
4975
4976                 l_sa = laddr->ifa->ifa_addr;
4977                 if (l_sa->sa_family == AF_INET6) {
4978                         /* IPv6 address */
4979                         struct sockaddr_in6 *sin1, *sin2;
4980
4981                         sin1 = (struct sockaddr_in6 *)l_sa;
4982                         sin2 = (struct sockaddr_in6 *)sa;
4983                         if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4984                             sizeof(struct in6_addr)) == 0) {
4985                                 /* matched */
4986                                 found = 1;
4987                                 break;
4988                         }
4989                 } else if (l_sa->sa_family == AF_INET) {
4990                         /* IPv4 address */
4991                         struct sockaddr_in *sin1, *sin2;
4992
4993                         sin1 = (struct sockaddr_in *)l_sa;
4994                         sin2 = (struct sockaddr_in *)sa;
4995                         if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4996                                 /* matched */
4997                                 found = 1;
4998                                 break;
4999                         }
5000                 } else {
5001                         /* invalid family */
5002                         return (-1);
5003                 }
5004         }
5005
5006         if (found && inp->laddr_count < 2) {
5007                 /* can't delete unless there are at LEAST 2 addresses */
5008                 return (-1);
5009         }
5010         if (found && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
5011                 /*
5012                  * remove it from the ep list, this should NOT be done until
5013                  * its really gone from the interface list and we won't be
5014                  * receiving more of these. Probably right away. If we do
5015                  * allow a removal of an address from an association
5016                  * (sub-set bind) than this should NOT be called until the
5017                  * all ASCONF come back from this association.
5018                  */
5019                 sctp_remove_laddr(laddr);
5020                 return (0);
5021         } else {
5022                 return (-1);
5023         }
5024 }
5025
5026 static sctp_assoc_t reneged_asoc_ids[256];
5027 static uint8_t reneged_at = 0;
5028
5029 extern int sctp_do_drain;
5030
5031 static void
5032 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5033 {
5034         /*
5035          * We must hunt this association for MBUF's past the cumack (i.e.
5036          * out of order data that we can renege on).
5037          */
5038         struct sctp_association *asoc;
5039         struct sctp_tmit_chunk *chk, *nchk;
5040         uint32_t cumulative_tsn_p1, tsn;
5041         struct sctp_queued_to_read *ctl, *nctl;
5042         int cnt, strmat, gap;
5043
5044         /* We look for anything larger than the cum-ack + 1 */
5045
5046         if (sctp_do_drain == 0) {
5047                 return;
5048         }
5049         asoc = &stcb->asoc;
5050         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5051                 /* none we can reneg on. */
5052                 return;
5053         }
5054         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5055         cnt = 0;
5056         /* First look in the re-assembly queue */
5057         chk = TAILQ_FIRST(&asoc->reasmqueue);
5058         while (chk) {
5059                 /* Get the next one */
5060                 nchk = TAILQ_NEXT(chk, sctp_next);
5061                 if (compare_with_wrap(chk->rec.data.TSN_seq,
5062                     cumulative_tsn_p1, MAX_TSN)) {
5063                         /* Yep it is above cum-ack */
5064                         cnt++;
5065                         tsn = chk->rec.data.TSN_seq;
5066                         if (tsn >= asoc->mapping_array_base_tsn) {
5067                                 gap = tsn - asoc->mapping_array_base_tsn;
5068                         } else {
5069                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5070                                     tsn + 1;
5071                         }
5072                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5073                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5074                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5075                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5076                         if (chk->data) {
5077                                 sctp_m_freem(chk->data);
5078                                 chk->data = NULL;
5079                         }
5080                         sctp_free_remote_addr(chk->whoTo);
5081                         sctp_free_a_chunk(stcb, chk);
5082                 }
5083                 chk = nchk;
5084         }
5085         /* Ok that was fun, now we will drain all the inbound streams? */
5086         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
5087                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
5088                 while (ctl) {
5089                         nctl = TAILQ_NEXT(ctl, next);
5090                         if (compare_with_wrap(ctl->sinfo_tsn,
5091                             cumulative_tsn_p1, MAX_TSN)) {
5092                                 /* Yep it is above cum-ack */
5093                                 cnt++;
5094                                 tsn = ctl->sinfo_tsn;
5095                                 if (tsn >= asoc->mapping_array_base_tsn) {
5096                                         gap = tsn -
5097                                             asoc->mapping_array_base_tsn;
5098                                 } else {
5099                                         gap = (MAX_TSN -
5100                                             asoc->mapping_array_base_tsn) +
5101                                             tsn + 1;
5102                                 }
5103                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
5104                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
5105
5106                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
5107                                     gap);
5108                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
5109                                     ctl, next);
5110                                 if (ctl->data) {
5111                                         sctp_m_freem(ctl->data);
5112                                         ctl->data = NULL;
5113                                 }
5114                                 sctp_free_remote_addr(ctl->whoFrom);
5115                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
5116                                 SCTP_DECR_READQ_COUNT();
5117                         }
5118                         ctl = nctl;
5119                 }
5120         }
5121         /*
5122          * Question, should we go through the delivery queue? The only
5123          * reason things are on here is the app not reading OR a p-d-api up.
5124          * An attacker COULD send enough in to initiate the PD-API and then
5125          * send a bunch of stuff to other streams... these would wind up on
5126          * the delivery queue.. and then we would not get to them. But in
5127          * order to do this I then have to back-track and un-deliver
5128          * sequence numbers in streams.. el-yucko. I think for now we will
5129          * NOT look at the delivery queue and leave it to be something to
5130          * consider later. An alternative would be to abort the P-D-API with
5131          * a notification and then deliver the data.... Or another method
5132          * might be to keep track of how many times the situation occurs and
5133          * if we see a possible attack underway just abort the association.
5134          */
5135 #ifdef SCTP_DEBUG
5136         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
5137                 if (cnt) {
5138                         printf("Freed %d chunks from reneg harvest\n", cnt);
5139                 }
5140         }
5141 #endif                          /* SCTP_DEBUG */
5142         if (cnt) {
5143                 /*
5144                  * Now do we need to find a new
5145                  * asoc->highest_tsn_inside_map?
5146                  */
5147                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
5148                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
5149                 } else {
5150                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5151                             asoc->highest_tsn_inside_map + 1;
5152                 }
5153                 if (gap >= (asoc->mapping_array_size << 3)) {
5154                         /*
5155                          * Something bad happened or cum-ack and high were
5156                          * behind the base, but if so earlier checks should
5157                          * have found NO data... wierd... we will start at
5158                          * end of mapping array.
5159                          */
5160                         printf("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
5161                             (int)gap,
5162                             (int)(asoc->mapping_array_size << 3),
5163                             (int)asoc->highest_tsn_inside_map);
5164                         gap = asoc->mapping_array_size << 3;
5165                 }
5166                 while (gap > 0) {
5167                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
5168                                 /* found the new highest */
5169                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
5170                                 break;
5171                         }
5172                         gap--;
5173                 }
5174                 if (gap == 0) {
5175                         /* Nothing left in map */
5176                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
5177                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
5178                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
5179                 }
5180                 asoc->last_revoke_count = cnt;
5181                 callout_stop(&stcb->asoc.dack_timer.timer);
5182                 sctp_send_sack(stcb);
5183                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
5184                 reneged_at++;
5185         }
5186         /*
5187          * Another issue, in un-setting the TSN's in the mapping array we
5188          * DID NOT adjust the higest_tsn marker.  This will cause one of two
5189          * things to occur. It may cause us to do extra work in checking for
5190          * our mapping array movement. More importantly it may cause us to
5191          * SACK every datagram. This may not be a bad thing though since we
5192          * will recover once we get our cum-ack above and all this stuff we
5193          * dumped recovered.
5194          */
5195 }
5196
5197 void
5198 sctp_drain()
5199 {
5200         /*
5201          * We must walk the PCB lists for ALL associations here. The system
5202          * is LOW on MBUF's and needs help. This is where reneging will
5203          * occur. We really hope this does NOT happen!
5204          */
5205         struct sctp_inpcb *inp;
5206         struct sctp_tcb *stcb;
5207
5208         SCTP_INP_INFO_RLOCK();
5209         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
5210                 /* For each endpoint */
5211                 SCTP_INP_RLOCK(inp);
5212                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5213                         /* For each association */
5214                         SCTP_TCB_LOCK(stcb);
5215                         sctp_drain_mbufs(inp, stcb);
5216                         SCTP_TCB_UNLOCK(stcb);
5217                 }
5218                 SCTP_INP_RUNLOCK(inp);
5219         }
5220         SCTP_INP_INFO_RUNLOCK();
5221 }
5222
5223 /*
5224  * start a new iterator
5225  * iterates through all endpoints and associations based on the pcb_state
5226  * flags and asoc_state.  "af" (mandatory) is executed for all matching
5227  * assocs and "ef" (optional) is executed when the iterator completes.
5228  * "inpf" (optional) is executed for each new endpoint as it is being
5229  * iterated through.
5230  */
5231 int
5232 sctp_initiate_iterator(inp_func inpf, asoc_func af, uint32_t pcb_state,
5233     uint32_t pcb_features, uint32_t asoc_state, void *argp, uint32_t argi,
5234     end_func ef, struct sctp_inpcb *s_inp, uint8_t chunk_output_off)
5235 {
5236         struct sctp_iterator *it = NULL;
5237         int s;
5238
5239         if (af == NULL) {
5240                 return (-1);
5241         }
5242         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
5243             "Iterator");
5244         if (it == NULL) {
5245                 return (ENOMEM);
5246         }
5247         memset(it, 0, sizeof(*it));
5248         it->function_assoc = af;
5249         it->function_inp = inpf;
5250         it->function_atend = ef;
5251         it->pointer = argp;
5252         it->val = argi;
5253         it->pcb_flags = pcb_state;
5254         it->pcb_features = pcb_features;
5255         it->asoc_state = asoc_state;
5256         it->no_chunk_output = chunk_output_off;
5257         if (s_inp) {
5258                 it->inp = s_inp;
5259                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5260         } else {
5261                 SCTP_INP_INFO_RLOCK();
5262                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5263                 SCTP_INP_INFO_RUNLOCK();
5264                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5265
5266         }
5267         /* Init the timer */
5268         callout_init(&it->tmr.timer, 1);
5269         /* add to the list of all iterators */
5270         SCTP_INP_INFO_WLOCK();
5271         LIST_INSERT_HEAD(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5272         SCTP_INP_INFO_WUNLOCK();
5273         s = splnet();
5274         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
5275             NULL, NULL);
5276         splx(s);
5277         return (0);
5278 }
5279
5280
5281 /*
5282  * Callout/Timer routines for OS that doesn't have them
5283  */