sys/netinet6/in6_pcb.c

   1 /*      $FreeBSD: src/sys/netinet6/in6_pcb.c,v 1.10.2.9 2003/01/24 05:11:35 sam Exp $   */
   2 /*      $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $        */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  */
  33
  34 /*
  35  * Copyright (c) 1982, 1986, 1991, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)in_pcb.c    8.2 (Berkeley) 1/4/94
  63  */
  64
  65 #include "opt_inet.h"
  66 #include "opt_inet6.h"
  67 #include "opt_ipsec.h"
  68
  69 #include <sys/param.h>
  70 #include <sys/systm.h>
  71 #include <sys/malloc.h>
  72 #include <sys/mbuf.h>
  73 #include <sys/domain.h>
  74 #include <sys/protosw.h>
  75 #include <sys/socket.h>
  76 #include <sys/socketvar.h>
  77 #include <sys/sockio.h>
  78 #include <sys/errno.h>
  79 #include <sys/time.h>
  80 #include <sys/proc.h>
  81 #include <sys/priv.h>
  82 #include <sys/jail.h>
  83
  84 #include <sys/thread2.h>
  85 #include <sys/msgport2.h>
  86
  87 #include <vm/vm_zone.h>
  88
  89 #include <net/if.h>
  90 #include <net/if_types.h>
  91 #include <net/route.h>
  92 #include <net/netisr2.h>
  93
  94 #include <netinet/in.h>
  95 #include <netinet/in_var.h>
  96 #include <netinet/in_systm.h>
  97 #include <netinet/ip6.h>
  98 #include <netinet/ip_var.h>
  99 #include <netinet6/ip6_var.h>
 100 #include <netinet6/nd6.h>
 101 #include <netinet/in_pcb.h>
 102 #include <netinet6/in6_pcb.h>
 103
 104 #ifdef IPSEC
 105 #include <netinet6/ipsec.h>
 106 #ifdef INET6
 107 #include <netinet6/ipsec6.h>
 108 #endif
 109 #include <netinet6/ah.h>
 110 #ifdef INET6
 111 #include <netinet6/ah6.h>
 112 #endif
 113 #include <netproto/key/key.h>
 114 #endif /* IPSEC */
 115
 116 #ifdef FAST_IPSEC
 117 #include <netproto/ipsec/ipsec.h>
 118 #include <netproto/ipsec/ipsec6.h>
 119 #include <netproto/ipsec/key.h>
 120 #define IPSEC
 121 #endif /* FAST_IPSEC */
 122
 123 struct  in6_addr zeroin6_addr;
 124
 125 int
 126 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 127 {
 128         struct socket *so = inp->inp_socket;
 129         struct sockaddr_in6 jsin6;
 130         int error;
 131
 132         if (!in6_ifaddr) /* XXX broken! */
 133                 return (EADDRNOTAVAIL);
 134         if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 135                 return (EINVAL);
 136
 137         if (nam) {
 138                 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 139                 struct inpcbinfo *pcbinfo;
 140                 struct inpcbportinfo *portinfo;
 141                 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
 142                 struct ucred *cred = NULL;
 143                 struct inpcb *t;
 144                 u_short lport, lport_ho;
 145
 146                 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
 147                         wild = 1;
 148                 if (td->td_proc != NULL)
 149                         cred = td->td_proc->p_ucred;
 150
 151                 if (nam->sa_len != sizeof(*sin6))
 152                         return (EINVAL);
 153                 /*
 154                  * family check.
 155                  */
 156                 if (nam->sa_family != AF_INET6)
 157                         return (EAFNOSUPPORT);
 158
 159                 /* Reject v4-mapped address */
 160                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
 161                         return (EADDRNOTAVAIL);
 162
 163                 if (!prison_replace_wildcards(td, nam))
 164                         return (EINVAL);
 165
 166                 /* KAME hack: embed scopeid */
 167                 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
 168                         return (EINVAL);
 169                 /* this must be cleared for ifa_ifwithaddr() */
 170                 sin6->sin6_scope_id = 0;
 171
 172                 lport = sin6->sin6_port;
 173                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 174                         /*
 175                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 176                          * allow compepte duplication of binding if
 177                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 178                          * and a multicast address is bound on both
 179                          * new and duplicated sockets.
 180                          */
 181                         if (so->so_options & SO_REUSEADDR)
 182                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
 183                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 184                         struct ifaddr *ia = NULL;
 185
 186                         sin6->sin6_port = 0;            /* yech... */
 187                         if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) {
 188                                 sin6->sin6_addr = kin6addr_any;
 189                                 return (EINVAL);
 190                         }
 191                         if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL)
 192                                 return (EADDRNOTAVAIL);
 193
 194                         /*
 195                          * XXX: bind to an anycast address might accidentally
 196                          * cause sending a packet with anycast source address.
 197                          * We should allow to bind to a deprecated address, since
 198                          * the application dare to use it.
 199                          */
 200                         if (ia &&
 201                             ((struct in6_ifaddr *)ia)->ia6_flags &
 202                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED))
 203                                 return (EADDRNOTAVAIL);
 204                 }
 205
 206                 inp->in6p_laddr = sin6->sin6_addr;
 207
 208                 if (lport == 0)
 209                         goto auto_select;
 210                 lport_ho = ntohs(lport);
 211
 212                 /* GROSS */
 213                 if (lport_ho < IPV6PORT_RESERVED && cred &&
 214                     priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) {
 215                         inp->in6p_laddr = kin6addr_any;
 216                         return (EACCES);
 217                 }
 218
 219                 /*
 220                  * Locate the proper portinfo based on lport
 221                  */
 222                 pcbinfo = inp->inp_pcbinfo;
 223                 portinfo =
 224                     &pcbinfo->portinfo[lport_ho & pcbinfo->portinfo_mask];
 225                 KKASSERT((lport_ho & pcbinfo->portinfo_mask) ==
 226                     portinfo->offset);
 227
 228                 /*
 229                  * This has to be atomic.  If the porthash is shared across
 230                  * multiple protocol threads (aka tcp) then the token must
 231                  * be held.
 232                  */
 233                 GET_PORT_TOKEN(portinfo);
 234
 235                 if (so->so_cred->cr_uid != 0 &&
 236                     !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 237                         t = in6_pcblookup_local(portinfo,
 238                             &sin6->sin6_addr, lport, INPLOOKUP_WILDCARD, cred);
 239                         if (t &&
 240                             (so->so_cred->cr_uid !=
 241                              t->inp_socket->so_cred->cr_uid)) {
 242                                 inp->in6p_laddr = kin6addr_any;
 243                                 error = EADDRINUSE;
 244                                 goto done;
 245                         }
 246                 }
 247                 if (cred && cred->cr_prison &&
 248                     !prison_replace_wildcards(td, nam)) {
 249                         inp->in6p_laddr = kin6addr_any;
 250                         error = EADDRNOTAVAIL;
 251                         goto done;
 252                 }
 253                 t = in6_pcblookup_local(portinfo, &sin6->sin6_addr, lport,
 254                     wild, cred);
 255                 if (t && (reuseport & t->inp_socket->so_options) == 0) {
 256                         inp->in6p_laddr = kin6addr_any;
 257                         error = EADDRINUSE;
 258                         goto done;
 259                 }
 260
 261                 inp->inp_lport = lport;
 262                 in_pcbinsporthash(portinfo, inp);
 263                 error = 0;
 264 done:
 265                 REL_PORT_TOKEN(portinfo);
 266                 return (error);
 267         } else {
 268 auto_select:
 269                 jsin6.sin6_addr = inp->in6p_laddr;
 270                 jsin6.sin6_family = AF_INET6;
 271                 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) {
 272                         inp->in6p_laddr = kin6addr_any;
 273                         inp->inp_lport = 0;
 274                         return (EINVAL);
 275                 }
 276
 277                 return in6_pcbsetlport(&inp->in6p_laddr, inp, td);
 278         }
 279 }
 280
 281 /*
 282  *   Transform old in6_pcbconnect() into an inner subroutine for new
 283  *   in6_pcbconnect(): Do some validity-checking on the remote
 284  *   address (in mbuf 'nam') and then determine local host address
 285  *   (i.e., which interface) to use to access that remote host.
 286  *
 287  *   This preserves definition of in6_pcbconnect(), while supporting a
 288  *   slightly different version for T/TCP.  (This is more than
 289  *   a bit of a kludge, but cleaning up the internal interfaces would
 290  *   have forced minor changes in every protocol).
 291  */
 292
 293 int
 294 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
 295              struct in6_addr **plocal_addr6, struct thread *td)
 296 {
 297         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 298         struct ifnet *ifp = NULL;
 299         int error = 0;
 300
 301         if (nam->sa_len != sizeof (*sin6))
 302                 return (EINVAL);
 303         if (sin6->sin6_family != AF_INET6)
 304                 return (EAFNOSUPPORT);
 305         if (sin6->sin6_port == 0)
 306                 return (EADDRNOTAVAIL);
 307
 308         /* KAME hack: embed scopeid */
 309         if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
 310                 return EINVAL;
 311
 312         if (in6_ifaddr) {
 313                 /*
 314                  * If the destination address is UNSPECIFIED addr,
 315                  * use the loopback addr, e.g ::1.
 316                  */
 317                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 318                         sin6->sin6_addr = kin6addr_loopback;
 319         }
 320         {
 321                 /*
 322                  * XXX: in6_selectsrc might replace the bound local address
 323                  * with the address specified by setsockopt(IPV6_PKTINFO).
 324                  * Is it the intended behavior?
 325                  */
 326                 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
 327                                               inp->in6p_moptions,
 328                                               &inp->in6p_route,
 329                                               &inp->in6p_laddr, &error, td);
 330                 if (*plocal_addr6 == NULL) {
 331                         if (error == 0)
 332                                 error = EADDRNOTAVAIL;
 333                         return (error);
 334                 }
 335                 /*
 336                  * Don't do pcblookup call here; return interface in
 337                  * plocal_addr6
 338                  * and exit to caller, that will do the lookup.
 339                  */
 340         }
 341
 342         if (inp->in6p_route.ro_rt)
 343                 ifp = inp->in6p_route.ro_rt->rt_ifp;
 344
 345         return (0);
 346 }
 347
 348 /*
 349  * Outer subroutine:
 350  * Connect from a socket to a specified address.
 351  * Both address and port must be specified in argument sin.
 352  * If don't have a local address for this socket yet,
 353  * then pick one.
 354  */
 355 int
 356 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 357 {
 358         struct in6_addr *addr6;
 359         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 360         int error;
 361
 362         /* Reject v4-mapped address */
 363         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
 364                 return EADDRNOTAVAIL;
 365
 366         /*
 367          * Call inner routine, to assign local interface address.
 368          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 369          */
 370         if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0)
 371                 return (error);
 372
 373         if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
 374                                sin6->sin6_port,
 375                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 376                               ? addr6 : &inp->in6p_laddr,
 377                               inp->inp_lport, 0, NULL) != NULL) {
 378                 return (EADDRINUSE);
 379         }
 380         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 381                 if (inp->inp_lport == 0) {
 382                         error = in6_pcbbind(inp, NULL, td);
 383                         if (error)
 384                                 return (error);
 385                 }
 386                 inp->in6p_laddr = *addr6;
 387         }
 388         inp->in6p_faddr = sin6->sin6_addr;
 389         inp->inp_fport = sin6->sin6_port;
 390         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 391         inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
 392         if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
 393                 inp->in6p_flowinfo |=
 394                     (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
 395
 396         in_pcbinsconnhash(inp);
 397         return (0);
 398 }
 399
 400 #if 0
 401 /*
 402  * Return an IPv6 address, which is the most appropriate for given
 403  * destination and user specified options.
 404  * If necessary, this function lookups the routing table and return
 405  * an entry to the caller for later use.
 406  */
 407 struct in6_addr *
 408 in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts,
 409               struct ip6_moptions *mopts, struct route_in6 *ro,
 410               struct in6_addr *laddr, int *errorp, struct thread *td)
 411 {
 412         struct sockaddr_in6 jsin6;
 413         struct ucred *cred = NULL;
 414         struct in6_addr *dst;
 415         struct in6_ifaddr *ia6 = 0;
 416         struct in6_pktinfo *pi = NULL;
 417         int jailed = 0;
 418
 419         if (td && td->td_proc && td->td_proc->p_ucred)
 420                 cred = td->td_proc->p_ucred;
 421         if (cred && cred->cr_prison)
 422                 jailed = 1;
 423         jsin6.sin6_family = AF_INET6;
 424         dst = &dstsock->sin6_addr;
 425         *errorp = 0;
 426
 427         /*
 428          * If the source address is explicitly specified by the caller,
 429          * use it.
 430          */
 431         if (opts && (pi = opts->ip6po_pktinfo) &&
 432             !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) {
 433                 jsin6.sin6_addr = pi->ipi6_addr;
 434                 if (jailed && !jailed_ip(cred->cr_prison,
 435                     (struct sockaddr *)&jsin6)) {
 436                         return(0);
 437                 } else {
 438                         return (&pi->ipi6_addr);
 439                 }
 440         }
 441
 442         /*
 443          * If the source address is not specified but the socket(if any)
 444          * is already bound, use the bound address.
 445          */
 446         if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) {
 447                 jsin6.sin6_addr = *laddr;
 448                 if (jailed && !jailed_ip(cred->cr_prison,
 449                     (struct sockaddr *)&jsin6)) {
 450                         return(0);
 451                 } else {
 452                         return (laddr);
 453                 }
 454         }
 455
 456         /*
 457          * If the caller doesn't specify the source address but
 458          * the outgoing interface, use an address associated with
 459          * the interface.
 460          */
 461         if (pi && pi->ipi6_ifindex) {
 462                 /* XXX boundary check is assumed to be already done. */
 463                 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
 464                                        dst, cred);
 465
 466                 if (ia6 && jailed) {
 467                         jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
 468                         if (!jailed_ip(cred->cr_prison,
 469                                 (struct sockaddr *)&jsin6))
 470                                 ia6 = 0;
 471                 }
 472
 473                 if (ia6 == 0) {
 474                         *errorp = EADDRNOTAVAIL;
 475                         return (0);
 476                 }
 477                 return (&satosin6(&ia6->ia_addr)->sin6_addr);
 478         }
 479
 480         /*
 481          * If the destination address is a link-local unicast address or
 482          * a multicast address, and if the outgoing interface is specified
 483          * by the sin6_scope_id filed, use an address associated with the
 484          * interface.
 485          * XXX: We're now trying to define more specific semantics of
 486          *      sin6_scope_id field, so this part will be rewritten in
 487          *      the near future.
 488          */
 489         if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
 490             dstsock->sin6_scope_id) {
 491                 /*
 492                  * I'm not sure if boundary check for scope_id is done
 493                  * somewhere...
 494                  */
 495                 if (dstsock->sin6_scope_id < 0 ||
 496                     if_index < dstsock->sin6_scope_id) {
 497                         *errorp = ENXIO; /* XXX: better error? */
 498                         return (0);
 499                 }
 500                 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
 501                                        dst, cred);
 502
 503                 if (ia6 && jailed) {
 504                         jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
 505                         if (!jailed_ip(cred->cr_prison,
 506                                 (struct sockaddr *)&jsin6))
 507                                 ia6 = 0;
 508                 }
 509
 510                 if (ia6 == 0) {
 511                         *errorp = EADDRNOTAVAIL;
 512                         return (0);
 513                 }
 514                 return (&satosin6(&ia6->ia_addr)->sin6_addr);
 515         }
 516
 517         /*
 518          * If the destination address is a multicast address and
 519          * the outgoing interface for the address is specified
 520          * by the caller, use an address associated with the interface.
 521          * There is a sanity check here; if the destination has node-local
 522          * scope, the outgoing interfacde should be a loopback address.
 523          * Even if the outgoing interface is not specified, we also
 524          * choose a loopback interface as the outgoing interface.
 525          */
 526         if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) {
 527                 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
 528
 529                 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
 530                         ifp = &loif[0];
 531                 }
 532
 533                 if (ifp) {
 534                         ia6 = in6_ifawithscope(ifp, dst, cred);
 535                         if (ia6 == 0) {
 536                                 *errorp = EADDRNOTAVAIL;
 537                                 return (0);
 538                         }
 539                         return (&ia6->ia_addr.sin6_addr);
 540                 }
 541         }
 542
 543         /*
 544          * If the next hop address for the packet is specified
 545          * by caller, use an address associated with the route
 546          * to the next hop.
 547          */
 548         {
 549                 struct sockaddr_in6 *sin6_next;
 550                 struct rtentry *rt;
 551
 552                 if (opts && opts->ip6po_nexthop) {
 553                         sin6_next = satosin6(opts->ip6po_nexthop);
 554                         rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
 555                         if (rt) {
 556                                 ia6 = in6_ifawithscope(rt->rt_ifp, dst, cred);
 557                                 if (ia6 == 0)
 558                                         ia6 = ifatoia6(rt->rt_ifa);
 559                         }
 560                         if (ia6 && jailed) {
 561                                 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
 562                                 if (!jailed_ip(cred->cr_prison,
 563                                         (struct sockaddr *)&jsin6))
 564                                         ia6 = 0;
 565                         }
 566
 567                         if (ia6 == 0) {
 568                                 *errorp = EADDRNOTAVAIL;
 569                                 return (0);
 570                         }
 571                         return (&satosin6(&ia6->ia_addr)->sin6_addr);
 572                 }
 573         }
 574
 575         /*
 576          * If route is known or can be allocated now,
 577          * our src addr is taken from the i/f, else punt.
 578          */
 579         if (ro) {
 580                 if (ro->ro_rt &&
 581                     !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
 582                         RTFREE(ro->ro_rt);
 583                         ro->ro_rt = NULL;
 584                 }
 585                 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) {
 586                         struct sockaddr_in6 *dst6;
 587
 588                         /* No route yet, so try to acquire one */
 589                         bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
 590                         dst6 = &ro->ro_dst;
 591                         dst6->sin6_family = AF_INET6;
 592                         dst6->sin6_len = sizeof(struct sockaddr_in6);
 593                         dst6->sin6_addr = *dst;
 594                         if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) {
 595                                 ro->ro_rt =
 596                                   rtpurelookup((struct sockaddr *)&ro->ro_dst);
 597                         } else {
 598                                 rtalloc((struct route *)ro);
 599                         }
 600                 }
 601
 602                 /*
 603                  * in_pcbconnect() checks out IFF_LOOPBACK to skip using
 604                  * the address. But we don't know why it does so.
 605                  * It is necessary to ensure the scope even for lo0
 606                  * so doesn't check out IFF_LOOPBACK.
 607                  */
 608
 609                 if (ro->ro_rt) {
 610                         ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst, cred);
 611                         if (ia6 && jailed) {
 612                                 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
 613                                 if (!jailed_ip(cred->cr_prison,
 614                                         (struct sockaddr *)&jsin6))
 615                                         ia6 = 0;
 616                         }
 617
 618                         if (ia6 == 0) /* xxx scope error ?*/
 619                                 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
 620
 621                         if (ia6 && jailed) {
 622                                 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
 623                                 if (!jailed_ip(cred->cr_prison,
 624                                         (struct sockaddr *)&jsin6))
 625                                         ia6 = 0;
 626                         }
 627                 }
 628                 if (ia6 == 0) {
 629                         *errorp = EHOSTUNREACH; /* no route */
 630                         return (0);
 631                 }
 632                 return (&satosin6(&ia6->ia_addr)->sin6_addr);
 633         }
 634
 635         *errorp = EADDRNOTAVAIL;
 636         return (0);
 637 }
 638
 639 /*
 640  * Default hop limit selection. The precedence is as follows:
 641  * 1. Hoplimit valued specified via ioctl.
 642  * 2. (If the outgoing interface is detected) the current
 643  *     hop limit of the interface specified by router advertisement.
 644  * 3. The system default hoplimit.
 645 */
 646 int
 647 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp)
 648 {
 649         if (in6p && in6p->in6p_hops >= 0)
 650                 return (in6p->in6p_hops);
 651         else if (ifp)
 652                 return (ND_IFINFO(ifp)->chlim);
 653         else
 654                 return (ip6_defhlim);
 655 }
 656 #endif
 657
 658 void
 659 in6_pcbdisconnect(struct inpcb *inp)
 660 {
 661         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 662         inp->inp_fport = 0;
 663         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 664         inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
 665         in_pcbremconnhash(inp);
 666         if (inp->inp_socket->so_state & SS_NOFDREF)
 667                 in6_pcbdetach(inp);
 668 }
 669
 670 void
 671 in6_pcbdetach(struct inpcb *inp)
 672 {
 673         struct socket *so = inp->inp_socket;
 674         struct inpcbinfo *ipi = inp->inp_pcbinfo;
 675
 676 #ifdef IPSEC
 677         if (inp->in6p_sp != NULL)
 678                 ipsec6_delete_pcbpolicy(inp);
 679 #endif /* IPSEC */
 680         inp->inp_gencnt = ++ipi->ipi_gencnt;
 681         in_pcbremlists(inp);
 682         so->so_pcb = NULL;
 683         KKASSERT((so->so_state & SS_ASSERTINPROG) == 0);
 684         sofree(so);             /* remove pcb ref */
 685
 686         if (inp->in6p_options)
 687                 m_freem(inp->in6p_options);
 688         ip6_freepcbopts(inp->in6p_outputopts);
 689         ip6_freemoptions(inp->in6p_moptions);
 690         if (inp->in6p_route.ro_rt)
 691                 rtfree(inp->in6p_route.ro_rt);
 692         /* Check and free IPv4 related resources in case of mapped addr */
 693         if (inp->inp_options)
 694                 m_free(inp->inp_options);
 695         ip_freemoptions(inp->inp_moptions);
 696
 697         kfree(inp, M_PCB);
 698 }
 699
 700 /*
 701  * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
 702  * modified to match the pru_sockaddr() and pru_peeraddr() entry points
 703  * in struct pr_usrreqs, so that protocols can just reference then directly
 704  * without the need for a wrapper function.  The socket must have a valid
 705  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
 706  * except through a kernel programming error, so it is acceptable to panic
 707  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
 708  * because there actually /is/ a programming error somewhere... XXX)
 709  */
 710 void
 711 in6_setsockaddr_dispatch(netmsg_t msg)
 712 {
 713         int error;
 714
 715         error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam);
 716         lwkt_replymsg(&msg->sockaddr.base.lmsg, error);
 717 }
 718
 719 int
 720 in6_setsockaddr(struct socket *so, struct sockaddr **nam)
 721 {
 722         struct inpcb *inp;
 723         struct sockaddr_in6 *sin6;
 724
 725         /*
 726          * Do the malloc first in case it blocks.
 727          */
 728         sin6 = kmalloc(sizeof *sin6, M_SONAME, M_WAITOK | M_ZERO);
 729         sin6->sin6_family = AF_INET6;
 730         sin6->sin6_len = sizeof(*sin6);
 731
 732         crit_enter();
 733         inp = so->so_pcb;
 734         if (!inp) {
 735                 crit_exit();
 736                 kfree(sin6, M_SONAME);
 737                 return EINVAL;
 738         }
 739         sin6->sin6_port = inp->inp_lport;
 740         sin6->sin6_addr = inp->in6p_laddr;
 741         crit_exit();
 742         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
 743                 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
 744         else
 745                 sin6->sin6_scope_id = 0;        /*XXX*/
 746         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
 747                 sin6->sin6_addr.s6_addr16[1] = 0;
 748
 749         *nam = (struct sockaddr *)sin6;
 750         return 0;
 751 }
 752
 753 void
 754 in6_setpeeraddr_dispatch(netmsg_t msg)
 755 {
 756         int error;
 757
 758         error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam);
 759         lwkt_replymsg(&msg->peeraddr.base.lmsg, error);
 760 }
 761
 762 int
 763 in6_setpeeraddr(struct socket *so, struct sockaddr **nam)
 764 {
 765         struct inpcb *inp;
 766         struct sockaddr_in6 *sin6;
 767
 768         /*
 769          * Do the malloc first in case it blocks.
 770          */
 771         sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO);
 772         sin6->sin6_family = AF_INET6;
 773         sin6->sin6_len = sizeof(struct sockaddr_in6);
 774
 775         crit_enter();
 776         inp = so->so_pcb;
 777         if (!inp) {
 778                 crit_exit();
 779                 kfree(sin6, M_SONAME);
 780                 return EINVAL;
 781         }
 782         sin6->sin6_port = inp->inp_fport;
 783         sin6->sin6_addr = inp->in6p_faddr;
 784         crit_exit();
 785         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
 786                 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
 787         else
 788                 sin6->sin6_scope_id = 0;        /*XXX*/
 789         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
 790                 sin6->sin6_addr.s6_addr16[1] = 0;
 791
 792         *nam = (struct sockaddr *)sin6;
 793         return 0;
 794 }
 795
 796 /*
 797  * Pass some notification to all connections of a protocol
 798  * associated with address dst.  The local address and/or port numbers
 799  * may be specified to limit the search.  The "usual action" will be
 800  * taken, depending on the ctlinput cmd.  The caller must filter any
 801  * cmds that are uninteresting (e.g., no error in the map).
 802  * Call the protocol specific routine (if any) to report
 803  * any errors for each matching socket.
 804  */
 805 void
 806 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, in_port_t fport,
 807     const struct sockaddr *src, in_port_t lport, int cmd, int arg,
 808     inp_notify_t notify)
 809 {
 810         struct inpcb *inp, *marker;
 811         struct sockaddr_in6 sa6_src, *sa6_dst;
 812         u_int32_t flowinfo;
 813
 814         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
 815                 return;
 816
 817         sa6_dst = (struct sockaddr_in6 *)dst;
 818         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 819                 return;
 820
 821         /*
 822          * note that src can be NULL when we get notify by local fragmentation.
 823          */
 824         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
 825         flowinfo = sa6_src.sin6_flowinfo;
 826
 827         /*
 828          * Redirects go to all references to the destination,
 829          * and use in6_rtchange to invalidate the route cache.
 830          * Dead host indications: also use in6_rtchange to invalidate
 831          * the cache, and deliver the error to all the sockets.
 832          * Otherwise, if we have knowledge of the local port and address,
 833          * deliver only to that socket.
 834          */
 835         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
 836                 fport = 0;
 837                 lport = 0;
 838                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
 839
 840                 if (cmd != PRC_HOSTDEAD)
 841                         notify = in6_rtchange;
 842         }
 843         if (cmd != PRC_MSGSIZE)
 844                 arg = inet6ctlerrmap[cmd];
 845
 846         marker = in_pcbmarker(mycpuid);
 847
 848         GET_PCBINFO_TOKEN(pcbinfo);
 849
 850         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
 851         while ((inp = LIST_NEXT(marker, inp_list)) != NULL) {
 852                 LIST_REMOVE(marker, inp_list);
 853                 LIST_INSERT_AFTER(inp, marker, inp_list);
 854
 855                 if (inp->inp_flags & INP_PLACEMARKER)
 856                         continue;
 857
 858                 if (!INP_ISIPV6(inp))
 859                         continue;
 860                 /*
 861                  * If the error designates a new path MTU for a destination
 862                  * and the application (associated with this socket) wanted to
 863                  * know the value, notify. Note that we notify for all
 864                  * disconnected sockets if the corresponding application
 865                  * wanted. This is because some UDP applications keep sending
 866                  * sockets disconnected.
 867                  * XXX: should we avoid to notify the value to TCP sockets?
 868                  */
 869                 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
 870                     (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 871                      IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
 872                         ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg);
 873                 }
 874
 875                 /*
 876                  * Detect if we should notify the error. If no source and
 877                  * destination ports are specifed, but non-zero flowinfo and
 878                  * local address match, notify the error. This is the case
 879                  * when the error is delivered with an encrypted buffer
 880                  * by ESP. Otherwise, just compare addresses and ports
 881                  * as usual.
 882                  */
 883                 if (lport == 0 && fport == 0 && flowinfo &&
 884                     inp->inp_socket != NULL &&
 885                     flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
 886                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 887                         goto do_notify;
 888                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 889                                              &sa6_dst->sin6_addr) ||
 890                          inp->inp_socket == 0 ||
 891                          (lport && inp->inp_lport != lport) ||
 892                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 893                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 894                                               &sa6_src.sin6_addr)) ||
 895                          (fport && inp->inp_fport != fport))
 896                         continue;
 897
 898 do_notify:
 899                 if (notify)
 900                         (*notify)(inp, arg);
 901         }
 902         LIST_REMOVE(marker, inp_list);
 903
 904         REL_PCBINFO_TOKEN(pcbinfo);
 905 }
 906
 907 /*
 908  * Lookup a PCB based on the local address and port.
 909  */
 910 struct inpcb *
 911 in6_pcblookup_local(struct inpcbportinfo *portinfo,
 912     const struct in6_addr *laddr, u_int lport_arg, int wild_okay,
 913     struct ucred *cred)
 914 {
 915         struct inpcb *inp;
 916         int matchwild = 3, wildcard;
 917         u_short lport = lport_arg;
 918         struct inpcbporthead *porthash;
 919         struct inpcbport *phd;
 920         struct inpcb *match = NULL;
 921
 922         /*
 923          * If the porthashbase is shared across several cpus, it must
 924          * have been locked.
 925          */
 926         ASSERT_PORT_TOKEN_HELD(portinfo);
 927
 928         /*
 929          * Best fit PCB lookup.
 930          *
 931          * First see if this local port is in use by looking on the
 932          * port hash list.
 933          */
 934         porthash = &portinfo->porthashbase[
 935                                 INP_PCBPORTHASH(lport, portinfo->porthashmask)];
 936         LIST_FOREACH(phd, porthash, phd_hash) {
 937                 if (phd->phd_port == lport)
 938                         break;
 939         }
 940
 941         if (phd != NULL) {
 942                 /*
 943                  * Port is in use by one or more PCBs. Look for best
 944                  * fit.
 945                  */
 946                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 947                         wildcard = 0;
 948                         if (!INP_ISIPV6(inp))
 949                                 continue;
 950                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 951                                 wildcard++;
 952                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 953                                 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 954                                         wildcard++;
 955                                 else if (!IN6_ARE_ADDR_EQUAL(
 956                                         &inp->in6p_laddr, laddr))
 957                                         continue;
 958                         } else {
 959                                 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 960                                         wildcard++;
 961                         }
 962                         if (wildcard && !wild_okay)
 963                                 continue;
 964                         if (wildcard < matchwild &&
 965                             (cred == NULL ||
 966                              cred->cr_prison ==
 967                                         inp->inp_socket->so_cred->cr_prison)) {
 968                                 match = inp;
 969                                 matchwild = wildcard;
 970                                 if (wildcard == 0)
 971                                         break;
 972                                 else
 973                                         matchwild = wildcard;
 974                         }
 975                 }
 976         }
 977         return (match);
 978 }
 979
 980 void
 981 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 982 {
 983         struct in6pcb *in6p, *marker;
 984         struct ip6_moptions *im6o;
 985         struct in6_multi_mship *imm, *nimm;
 986
 987         /*
 988          * We only need to make sure that we are in netisr0, where all
 989          * multicast operation happen.  We could check inpcbinfo which
 990          * does not belong to netisr0 by holding the inpcbinfo's token.
 991          * In this case, the pcbinfo must be able to be shared, i.e.
 992          * pcbinfo->infotoken is not NULL.
 993          */
 994         KASSERT(&curthread->td_msgport == netisr_cpuport(0),
 995             ("not in netisr0"));
 996         KASSERT(pcbinfo->cpu == 0 || pcbinfo->infotoken != NULL,
 997             ("pcbinfo could not be shared"));
 998
 999         /*
1000          * Get a marker for the current netisr (netisr0).
1001          *
1002          * It is possible that the multicast address deletion blocks,
1003          * which could cause temporary token releasing.  So we use
1004          * inpcb marker here to get a coherent view of the inpcb list.
1005          *
1006          * While, on the other hand, moptions are only added and deleted
1007          * in netisr0, so we would not see staled moption or miss moption
1008          * even if the token was released due to the blocking multicast
1009          * address deletion.
1010          */
1011         marker = in_pcbmarker(mycpuid);
1012
1013         GET_PCBINFO_TOKEN(pcbinfo);
1014
1015         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1016         while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) {
1017                 LIST_REMOVE(marker, inp_list);
1018                 LIST_INSERT_AFTER(in6p, marker, inp_list);
1019
1020                 if (in6p->in6p_flags & INP_PLACEMARKER)
1021                         continue;
1022                 im6o = in6p->in6p_moptions;
1023                 if (INP_ISIPV6(in6p) && im6o) {
1024                         /*
1025                          * Unselect the outgoing interface if it is being
1026                          * detached.
1027                          */
1028                         if (im6o->im6o_multicast_ifp == ifp)
1029                                 im6o->im6o_multicast_ifp = NULL;
1030
1031                         /*
1032                          * Drop multicast group membership if we joined
1033                          * through the interface being detached.
1034                          * XXX controversial - is it really legal for kernel
1035                          * to force this?
1036                          */
1037                         for (imm = im6o->im6o_memberships.lh_first;
1038                              imm != NULL; imm = nimm) {
1039                                 nimm = imm->i6mm_chain.le_next;
1040                                 if (imm->i6mm_maddr->in6m_ifp == ifp) {
1041                                         LIST_REMOVE(imm, i6mm_chain);
1042                                         in6_delmulti(imm->i6mm_maddr);
1043                                         kfree(imm, M_IPMADDR);
1044                                 }
1045                         }
1046                 }
1047         }
1048         LIST_REMOVE(marker, inp_list);
1049
1050         REL_PCBINFO_TOKEN(pcbinfo);
1051 }
1052
1053 /*
1054  * Check for alternatives when higher level complains
1055  * about service problems.  For now, invalidate cached
1056  * routing information.  If the route was created dynamically
1057  * (by a redirect), time to try a default gateway again.
1058  */
1059 void
1060 in6_losing(struct inpcb *in6p)
1061 {
1062         struct rtentry *rt;
1063         struct rt_addrinfo info;
1064
1065         if ((rt = in6p->in6p_route.ro_rt) != NULL) {
1066                 bzero((caddr_t)&info, sizeof(info));
1067                 info.rti_flags = rt->rt_flags;
1068                 info.rti_info[RTAX_DST] = rt_key(rt);
1069                 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1070                 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1071                 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
1072                 if (rt->rt_flags & RTF_DYNAMIC) {
1073                         rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1074                             rt_mask(rt), rt->rt_flags, NULL);
1075                 }
1076                 in6p->in6p_route.ro_rt = NULL;
1077                 rtfree(rt);
1078                 /*
1079                  * A new route can be allocated
1080                  * the next time output is attempted.
1081                  */
1082         }
1083 }
1084
1085 /*
1086  * After a routing change, flush old routing
1087  * and allocate a (hopefully) better one.
1088  */
1089 void
1090 in6_rtchange(struct inpcb *inp, int error)
1091 {
1092         if (inp->in6p_route.ro_rt) {
1093                 rtfree(inp->in6p_route.ro_rt);
1094                 inp->in6p_route.ro_rt = 0;
1095                 /*
1096                  * A new route can be allocated the next time
1097                  * output is attempted.
1098                  */
1099         }
1100 }
1101
1102 /*
1103  * Lookup PCB in hash list.
1104  */
1105 struct inpcb *
1106 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1107                    u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1108                    int wildcard, struct ifnet *ifp)
1109 {
1110         struct inpcbhead *head;
1111         struct inpcb *inp;
1112         struct inpcb *jinp = NULL;
1113         u_short fport = fport_arg, lport = lport_arg;
1114         int faith;
1115
1116         if (faithprefix_p != NULL)
1117                 faith = (*faithprefix_p)(laddr);
1118         else
1119                 faith = 0;
1120
1121         /*
1122          * First look for an exact match.
1123          */
1124         head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */,
1125                                               fport,
1126                                               laddr->s6_addr32[3], /* XXX JH */
1127                                               lport,
1128                                               pcbinfo->hashmask)];
1129         LIST_FOREACH(inp, head, inp_hash) {
1130                 if (!INP_ISIPV6(inp))
1131                         continue;
1132                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1133                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1134                     inp->inp_fport == fport &&
1135                     inp->inp_lport == lport) {
1136                         /*
1137                          * Found.
1138                          */
1139                         if (inp->inp_socket == NULL ||
1140                         inp->inp_socket->so_cred->cr_prison == NULL) {
1141                                 return (inp);
1142                         } else {
1143                                 if  (jinp == NULL)
1144                                         jinp = inp;
1145                         }
1146                 }
1147         }
1148         if (jinp != NULL)
1149                 return(jinp);
1150
1151         if (wildcard) {
1152                 struct inpcontainerhead *chead;
1153                 struct inpcontainer *ic;
1154                 struct inpcb *local_wild = NULL;
1155                 struct inpcb *jinp_wild = NULL;
1156                 struct sockaddr_in6 jsin6;
1157                 struct ucred *cred;
1158
1159                 /*
1160                  * Order of socket selection:
1161                  * 1. non-jailed, non-wild.
1162                  * 2. non-jailed, wild.
1163                  * 3. jailed, non-wild.
1164                  * 4. jailed, wild.
1165                  */
1166                 jsin6.sin6_family = AF_INET6;
1167                 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport,
1168                     pcbinfo->wildcardhashmask)];
1169
1170                 GET_PCBINFO_TOKEN(pcbinfo);
1171                 LIST_FOREACH(ic, chead, ic_list) {
1172                         inp = ic->ic_inp;
1173                         if (inp->inp_flags & INP_PLACEMARKER)
1174                                 continue;
1175
1176                         if (!INP_ISIPV6(inp))
1177                                 continue;
1178                         if (inp->inp_socket != NULL)
1179                                 cred = inp->inp_socket->so_cred;
1180                         else
1181                                 cred = NULL;
1182
1183                         if (cred != NULL && jailed(cred)) {
1184                                 if (jinp != NULL) {
1185                                         continue;
1186                                 } else {
1187                                         jsin6.sin6_addr = *laddr;
1188                                         if (!jailed_ip(cred->cr_prison,
1189                                             (struct sockaddr *)&jsin6))
1190                                                 continue;
1191                                 }
1192                         }
1193                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1194                             inp->inp_lport == lport) {
1195                                 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1196                                         continue;
1197                                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1198                                                        laddr)) {
1199                                         if (cred != NULL && jailed(cred)) {
1200                                                 jinp = inp;
1201                                         } else {
1202                                                 REL_PCBINFO_TOKEN(pcbinfo);
1203                                                 return (inp);
1204                                         }
1205                                 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1206                                         if (cred != NULL && jailed(cred))
1207                                                 jinp_wild = inp;
1208                                         else
1209                                                 local_wild = inp;
1210                                 }
1211                         }
1212                 }
1213                 REL_PCBINFO_TOKEN(pcbinfo);
1214
1215                 if (local_wild != NULL)
1216                         return (local_wild);
1217                 if (jinp != NULL)
1218                         return (jinp);
1219                 return (jinp_wild);
1220         }
1221
1222         /*
1223          * Not found.
1224          */
1225         return (NULL);
1226 }
1227
1228 void
1229 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1230 {
1231         struct ip6_hdr *ip;
1232
1233         ip = mtod(m, struct ip6_hdr *);
1234         bzero(sin6, sizeof(*sin6));
1235         sin6->sin6_len = sizeof(*sin6);
1236         sin6->sin6_family = AF_INET6;
1237         sin6->sin6_addr = ip->ip6_src;
1238         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1239                 sin6->sin6_addr.s6_addr16[1] = 0;
1240         sin6->sin6_scope_id =
1241                 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1242                 ? m->m_pkthdr.rcvif->if_index : 0;
1243
1244         return;
1245 }
1246
1247 void
1248 in6_savefaddr(struct socket *so, const struct sockaddr *faddr)
1249 {
1250         struct sockaddr_in6 *sin6;
1251
1252         KASSERT(faddr->sa_family == AF_INET6,
1253             ("not AF_INET6 faddr %d", faddr->sa_family));
1254
1255         sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO);
1256         sin6->sin6_family = AF_INET6;
1257         sin6->sin6_len = sizeof(*sin6);
1258
1259         sin6->sin6_port = ((const struct sockaddr_in6 *)faddr)->sin6_port;
1260         sin6->sin6_addr = ((const struct sockaddr_in6 *)faddr)->sin6_addr;
1261
1262         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1263                 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
1264         else
1265                 sin6->sin6_scope_id = 0;        /*XXX*/
1266         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1267                 sin6->sin6_addr.s6_addr16[1] = 0;
1268
1269         so->so_faddr = (struct sockaddr *)sin6;
1270 }