sys/netinet6/in6_pcb.c

   1 /*-
   2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   3  * Copyright (c) 2010-2011 Juniper Networks, Inc.
   4  * All rights reserved.
   5  *
   6  * Portions of this software were developed by Robert N. M. Watson under
   7  * contract to Juniper Networks, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
  34  */
  35
  36 /*-
  37  * Copyright (c) 1982, 1986, 1991, 1993
  38  *      The Regents of the University of California.  All rights reserved.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)in_pcb.c    8.2 (Berkeley) 1/4/94
  65  */
  66
  67 #include <sys/cdefs.h>
  68 __FBSDID("$FreeBSD$");
  69
  70 #include "opt_inet.h"
  71 #include "opt_inet6.h"
  72 #include "opt_ipsec.h"
  73 #include "opt_pcbgroup.h"
  74
  75 #include <sys/param.h>
  76 #include <sys/systm.h>
  77 #include <sys/malloc.h>
  78 #include <sys/mbuf.h>
  79 #include <sys/domain.h>
  80 #include <sys/protosw.h>
  81 #include <sys/socket.h>
  82 #include <sys/socketvar.h>
  83 #include <sys/sockio.h>
  84 #include <sys/errno.h>
  85 #include <sys/time.h>
  86 #include <sys/priv.h>
  87 #include <sys/proc.h>
  88 #include <sys/jail.h>
  89
  90 #include <vm/uma.h>
  91
  92 #include <net/if.h>
  93 #include <net/if_types.h>
  94 #include <net/route.h>
  95
  96 #include <netinet/in.h>
  97 #include <netinet/in_var.h>
  98 #include <netinet/in_systm.h>
  99 #include <netinet/tcp_var.h>
 100 #include <netinet/ip6.h>
 101 #include <netinet/ip_var.h>
 102
 103 #include <netinet6/ip6_var.h>
 104 #include <netinet6/nd6.h>
 105 #include <netinet/in_pcb.h>
 106 #include <netinet6/in6_pcb.h>
 107 #include <netinet6/scope6_var.h>
 108
 109 int
 110 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
 111     struct ucred *cred)
 112 {
 113         struct socket *so = inp->inp_socket;
 114         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
 115         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 116         u_short lport = 0;
 117         int error, lookupflags = 0;
 118         int reuseport = (so->so_options & SO_REUSEPORT);
 119
 120         INP_WLOCK_ASSERT(inp);
 121         INP_HASH_WLOCK_ASSERT(pcbinfo);
 122
 123         if (TAILQ_EMPTY(&V_in6_ifaddrhead))     /* XXX broken! */
 124                 return (EADDRNOTAVAIL);
 125         if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 126                 return (EINVAL);
 127         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
 128                 lookupflags = INPLOOKUP_WILDCARD;
 129         if (nam == NULL) {
 130                 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
 131                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 132                         return (error);
 133         } else {
 134                 sin6 = (struct sockaddr_in6 *)nam;
 135                 if (nam->sa_len != sizeof(*sin6))
 136                         return (EINVAL);
 137                 /*
 138                  * family check.
 139                  */
 140                 if (nam->sa_family != AF_INET6)
 141                         return (EAFNOSUPPORT);
 142
 143                 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 144                         return(error);
 145
 146                 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
 147                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 148                         return (error);
 149
 150                 lport = sin6->sin6_port;
 151                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 152                         /*
 153                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 154                          * allow compepte duplication of binding if
 155                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 156                          * and a multicast address is bound on both
 157                          * new and duplicated sockets.
 158                          */
 159                         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
 160                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
 161                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 162                         struct ifaddr *ifa;
 163
 164                         sin6->sin6_port = 0;            /* yech... */
 165                         if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
 166                             NULL &&
 167                             (inp->inp_flags & INP_BINDANY) == 0) {
 168                                 return (EADDRNOTAVAIL);
 169                         }
 170
 171                         /*
 172                          * XXX: bind to an anycast address might accidentally
 173                          * cause sending a packet with anycast source address.
 174                          * We should allow to bind to a deprecated address, since
 175                          * the application dares to use it.
 176                          */
 177                         if (ifa != NULL &&
 178                             ((struct in6_ifaddr *)ifa)->ia6_flags &
 179                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
 180                                 ifa_free(ifa);
 181                                 return (EADDRNOTAVAIL);
 182                         }
 183                         if (ifa != NULL)
 184                                 ifa_free(ifa);
 185                 }
 186                 if (lport) {
 187                         struct inpcb *t;
 188                         struct tcptw *tw;
 189
 190                         /* GROSS */
 191                         if (ntohs(lport) <= V_ipport_reservedhigh &&
 192                             ntohs(lport) >= V_ipport_reservedlow &&
 193                             priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
 194                             0))
 195                                 return (EACCES);
 196                         if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
 197                             priv_check_cred(inp->inp_cred,
 198                             PRIV_NETINET_REUSEPORT, 0) != 0) {
 199                                 t = in6_pcblookup_local(pcbinfo,
 200                                     &sin6->sin6_addr, lport,
 201                                     INPLOOKUP_WILDCARD, cred);
 202                                 if (t &&
 203                                     ((t->inp_flags & INP_TIMEWAIT) == 0) &&
 204                                     (so->so_type != SOCK_STREAM ||
 205                                      IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
 206                                     (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 207                                      !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
 208                                      (t->inp_flags2 & INP_REUSEPORT) == 0) &&
 209                                     (inp->inp_cred->cr_uid !=
 210                                      t->inp_cred->cr_uid))
 211                                         return (EADDRINUSE);
 212 #ifdef INET
 213                                 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 214                                     IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 215                                         struct sockaddr_in sin;
 216
 217                                         in6_sin6_2_sin(&sin, sin6);
 218                                         t = in_pcblookup_local(pcbinfo,
 219                                             sin.sin_addr, lport,
 220                                             INPLOOKUP_WILDCARD, cred);
 221                                         if (t &&
 222                                             ((t->inp_flags &
 223                                               INP_TIMEWAIT) == 0) &&
 224                                             (so->so_type != SOCK_STREAM ||
 225                                              ntohl(t->inp_faddr.s_addr) ==
 226                                               INADDR_ANY) &&
 227                                             (inp->inp_cred->cr_uid !=
 228                                              t->inp_cred->cr_uid))
 229                                                 return (EADDRINUSE);
 230                                 }
 231 #endif
 232                         }
 233                         t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
 234                             lport, lookupflags, cred);
 235                         if (t && (t->inp_flags & INP_TIMEWAIT)) {
 236                                 /*
 237                                  * XXXRW: If an incpb has had its timewait
 238                                  * state recycled, we treat the address as
 239                                  * being in use (for now).  This is better
 240                                  * than a panic, but not desirable.
 241                                  */
 242                                 tw = intotw(t);
 243                                 if (tw == NULL ||
 244                                     (reuseport & tw->tw_so_options) == 0)
 245                                         return (EADDRINUSE);
 246                         } else if (t && (reuseport & inp_so_options(t)) == 0) {
 247                                 return (EADDRINUSE);
 248                         }
 249 #ifdef INET
 250                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 251                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 252                                 struct sockaddr_in sin;
 253
 254                                 in6_sin6_2_sin(&sin, sin6);
 255                                 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
 256                                     lport, lookupflags, cred);
 257                                 if (t && t->inp_flags & INP_TIMEWAIT) {
 258                                         tw = intotw(t);
 259                                         if (tw == NULL)
 260                                                 return (EADDRINUSE);
 261                                         if ((reuseport & tw->tw_so_options) == 0
 262                                             && (ntohl(t->inp_laddr.s_addr) !=
 263                                              INADDR_ANY || ((inp->inp_vflag &
 264                                              INP_IPV6PROTO) ==
 265                                              (t->inp_vflag & INP_IPV6PROTO))))
 266                                                 return (EADDRINUSE);
 267                                 } else if (t &&
 268                                     (reuseport & inp_so_options(t)) == 0 &&
 269                                     (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
 270                                     (t->inp_vflag & INP_IPV6PROTO) != 0))
 271                                         return (EADDRINUSE);
 272                         }
 273 #endif
 274                 }
 275                 inp->in6p_laddr = sin6->sin6_addr;
 276         }
 277         if (lport == 0) {
 278                 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
 279                         /* Undo an address bind that may have occurred. */
 280                         inp->in6p_laddr = in6addr_any;
 281                         return (error);
 282                 }
 283         } else {
 284                 inp->inp_lport = lport;
 285                 if (in_pcbinshash(inp) != 0) {
 286                         inp->in6p_laddr = in6addr_any;
 287                         inp->inp_lport = 0;
 288                         return (EAGAIN);
 289                 }
 290         }
 291         return (0);
 292 }
 293
 294 /*
 295  *   Transform old in6_pcbconnect() into an inner subroutine for new
 296  *   in6_pcbconnect(): Do some validity-checking on the remote
 297  *   address (in mbuf 'nam') and then determine local host address
 298  *   (i.e., which interface) to use to access that remote host.
 299  *
 300  *   This preserves definition of in6_pcbconnect(), while supporting a
 301  *   slightly different version for T/TCP.  (This is more than
 302  *   a bit of a kludge, but cleaning up the internal interfaces would
 303  *   have forced minor changes in every protocol).
 304  */
 305 int
 306 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
 307     struct in6_addr *plocal_addr6)
 308 {
 309         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 310         int error = 0;
 311         struct ifnet *ifp = NULL;
 312         int scope_ambiguous = 0;
 313         struct in6_addr in6a;
 314
 315         INP_WLOCK_ASSERT(inp);
 316         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);        /* XXXRW: why? */
 317
 318         if (nam->sa_len != sizeof (*sin6))
 319                 return (EINVAL);
 320         if (sin6->sin6_family != AF_INET6)
 321                 return (EAFNOSUPPORT);
 322         if (sin6->sin6_port == 0)
 323                 return (EADDRNOTAVAIL);
 324
 325         if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
 326                 scope_ambiguous = 1;
 327         if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 328                 return(error);
 329
 330         if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
 331                 /*
 332                  * If the destination address is UNSPECIFIED addr,
 333                  * use the loopback addr, e.g ::1.
 334                  */
 335                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 336                         sin6->sin6_addr = in6addr_loopback;
 337         }
 338         if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 339                 return (error);
 340
 341         error = in6_selectsrc(sin6, inp->in6p_outputopts,
 342             inp, NULL, inp->inp_cred, &ifp, &in6a);
 343         if (error)
 344                 return (error);
 345
 346         if (ifp && scope_ambiguous &&
 347             (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
 348                 return(error);
 349         }
 350
 351         /*
 352          * Do not update this earlier, in case we return with an error.
 353          *
 354          * XXX: this in6_selectsrc result might replace the bound local
 355          * address with the address specified by setsockopt(IPV6_PKTINFO).
 356          * Is it the intended behavior?
 357          */
 358         *plocal_addr6 = in6a;
 359
 360         /*
 361          * Don't do pcblookup call here; return interface in
 362          * plocal_addr6
 363          * and exit to caller, that will do the lookup.
 364          */
 365
 366         return (0);
 367 }
 368
 369 /*
 370  * Outer subroutine:
 371  * Connect from a socket to a specified address.
 372  * Both address and port must be specified in argument sin.
 373  * If don't have a local address for this socket yet,
 374  * then pick one.
 375  */
 376 int
 377 in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
 378     struct ucred *cred, struct mbuf *m)
 379 {
 380         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 381         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 382         struct in6_addr addr6;
 383         int error;
 384
 385         INP_WLOCK_ASSERT(inp);
 386         INP_HASH_WLOCK_ASSERT(pcbinfo);
 387
 388         /*
 389          * Call inner routine, to assign local interface address.
 390          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 391          */
 392         if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
 393                 return (error);
 394
 395         if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
 396                                sin6->sin6_port,
 397                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 398                               ? &addr6 : &inp->in6p_laddr,
 399                               inp->inp_lport, 0, NULL) != NULL) {
 400                 return (EADDRINUSE);
 401         }
 402         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 403                 if (inp->inp_lport == 0) {
 404                         error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
 405                         if (error)
 406                                 return (error);
 407                 }
 408                 inp->in6p_laddr = addr6;
 409         }
 410         inp->in6p_faddr = sin6->sin6_addr;
 411         inp->inp_fport = sin6->sin6_port;
 412         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 413         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 414         if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
 415                 inp->inp_flow |=
 416                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 417
 418         in_pcbrehash_mbuf(inp, m);
 419
 420         return (0);
 421 }
 422
 423 int
 424 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 425 {
 426
 427         return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
 428 }
 429
 430 void
 431 in6_pcbdisconnect(struct inpcb *inp)
 432 {
 433
 434         INP_WLOCK_ASSERT(inp);
 435         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
 436
 437         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 438         inp->inp_fport = 0;
 439         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 440         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 441         in_pcbrehash(inp);
 442 }
 443
 444 struct sockaddr *
 445 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
 446 {
 447         struct sockaddr_in6 *sin6;
 448
 449         sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
 450         bzero(sin6, sizeof *sin6);
 451         sin6->sin6_family = AF_INET6;
 452         sin6->sin6_len = sizeof(*sin6);
 453         sin6->sin6_port = port;
 454         sin6->sin6_addr = *addr_p;
 455         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
 456
 457         return (struct sockaddr *)sin6;
 458 }
 459
 460 struct sockaddr *
 461 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
 462 {
 463         struct sockaddr_in sin;
 464         struct sockaddr_in6 *sin6_p;
 465
 466         bzero(&sin, sizeof sin);
 467         sin.sin_family = AF_INET;
 468         sin.sin_len = sizeof(sin);
 469         sin.sin_port = port;
 470         sin.sin_addr = *addr_p;
 471
 472         sin6_p = malloc(sizeof *sin6_p, M_SONAME,
 473                 M_WAITOK);
 474         in6_sin_2_v4mapsin6(&sin, sin6_p);
 475
 476         return (struct sockaddr *)sin6_p;
 477 }
 478
 479 int
 480 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
 481 {
 482         register struct inpcb *inp;
 483         struct in6_addr addr;
 484         in_port_t port;
 485
 486         inp = sotoinpcb(so);
 487         KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
 488
 489         INP_RLOCK(inp);
 490         port = inp->inp_lport;
 491         addr = inp->in6p_laddr;
 492         INP_RUNLOCK(inp);
 493
 494         *nam = in6_sockaddr(port, &addr);
 495         return 0;
 496 }
 497
 498 int
 499 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
 500 {
 501         struct inpcb *inp;
 502         struct in6_addr addr;
 503         in_port_t port;
 504
 505         inp = sotoinpcb(so);
 506         KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
 507
 508         INP_RLOCK(inp);
 509         port = inp->inp_fport;
 510         addr = inp->in6p_faddr;
 511         INP_RUNLOCK(inp);
 512
 513         *nam = in6_sockaddr(port, &addr);
 514         return 0;
 515 }
 516
 517 int
 518 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
 519 {
 520         struct  inpcb *inp;
 521         int     error;
 522
 523         inp = sotoinpcb(so);
 524         KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
 525
 526 #ifdef INET
 527         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 528                 error = in_getsockaddr(so, nam);
 529                 if (error == 0)
 530                         in6_sin_2_v4mapsin6_in_sock(nam);
 531         } else
 532 #endif
 533         {
 534                 /* scope issues will be handled in in6_getsockaddr(). */
 535                 error = in6_getsockaddr(so, nam);
 536         }
 537
 538         return error;
 539 }
 540
 541 int
 542 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
 543 {
 544         struct  inpcb *inp;
 545         int     error;
 546
 547         inp = sotoinpcb(so);
 548         KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
 549
 550 #ifdef INET
 551         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 552                 error = in_getpeeraddr(so, nam);
 553                 if (error == 0)
 554                         in6_sin_2_v4mapsin6_in_sock(nam);
 555         } else
 556 #endif
 557         /* scope issues will be handled in in6_getpeeraddr(). */
 558         error = in6_getpeeraddr(so, nam);
 559
 560         return error;
 561 }
 562
 563 /*
 564  * Pass some notification to all connections of a protocol
 565  * associated with address dst.  The local address and/or port numbers
 566  * may be specified to limit the search.  The "usual action" will be
 567  * taken, depending on the ctlinput cmd.  The caller must filter any
 568  * cmds that are uninteresting (e.g., no error in the map).
 569  * Call the protocol specific routine (if any) to report
 570  * any errors for each matching socket.
 571  */
 572 void
 573 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
 574     u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
 575     int cmd, void *cmdarg,
 576     struct inpcb *(*notify)(struct inpcb *, int))
 577 {
 578         struct inpcb *inp, *inp_temp;
 579         struct sockaddr_in6 sa6_src, *sa6_dst;
 580         u_short fport = fport_arg, lport = lport_arg;
 581         u_int32_t flowinfo;
 582         int errno;
 583
 584         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
 585                 return;
 586
 587         sa6_dst = (struct sockaddr_in6 *)dst;
 588         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 589                 return;
 590
 591         /*
 592          * note that src can be NULL when we get notify by local fragmentation.
 593          */
 594         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
 595         flowinfo = sa6_src.sin6_flowinfo;
 596
 597         /*
 598          * Redirects go to all references to the destination,
 599          * and use in6_rtchange to invalidate the route cache.
 600          * Dead host indications: also use in6_rtchange to invalidate
 601          * the cache, and deliver the error to all the sockets.
 602          * Otherwise, if we have knowledge of the local port and address,
 603          * deliver only to that socket.
 604          */
 605         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
 606                 fport = 0;
 607                 lport = 0;
 608                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
 609
 610                 if (cmd != PRC_HOSTDEAD)
 611                         notify = in6_rtchange;
 612         }
 613         errno = inet6ctlerrmap[cmd];
 614         INP_INFO_WLOCK(pcbinfo);
 615         LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
 616                 INP_WLOCK(inp);
 617                 if ((inp->inp_vflag & INP_IPV6) == 0) {
 618                         INP_WUNLOCK(inp);
 619                         continue;
 620                 }
 621
 622                 /*
 623                  * If the error designates a new path MTU for a destination
 624                  * and the application (associated with this socket) wanted to
 625                  * know the value, notify.
 626                  * XXX: should we avoid to notify the value to TCP sockets?
 627                  */
 628                 if (cmd == PRC_MSGSIZE && cmdarg != NULL)
 629                         ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
 630                                         *(u_int32_t *)cmdarg);
 631
 632                 /*
 633                  * Detect if we should notify the error. If no source and
 634                  * destination ports are specifed, but non-zero flowinfo and
 635                  * local address match, notify the error. This is the case
 636                  * when the error is delivered with an encrypted buffer
 637                  * by ESP. Otherwise, just compare addresses and ports
 638                  * as usual.
 639                  */
 640                 if (lport == 0 && fport == 0 && flowinfo &&
 641                     inp->inp_socket != NULL &&
 642                     flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
 643                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 644                         goto do_notify;
 645                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 646                                              &sa6_dst->sin6_addr) ||
 647                          inp->inp_socket == 0 ||
 648                          (lport && inp->inp_lport != lport) ||
 649                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 650                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 651                                               &sa6_src.sin6_addr)) ||
 652                          (fport && inp->inp_fport != fport)) {
 653                         INP_WUNLOCK(inp);
 654                         continue;
 655                 }
 656
 657           do_notify:
 658                 if (notify) {
 659                         if ((*notify)(inp, errno))
 660                                 INP_WUNLOCK(inp);
 661                 } else
 662                         INP_WUNLOCK(inp);
 663         }
 664         INP_INFO_WUNLOCK(pcbinfo);
 665 }
 666
 667 /*
 668  * Lookup a PCB based on the local address and port.  Caller must hold the
 669  * hash lock.  No inpcb locks or references are acquired.
 670  */
 671 struct inpcb *
 672 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
 673     u_short lport, int lookupflags, struct ucred *cred)
 674 {
 675         register struct inpcb *inp;
 676         int matchwild = 3, wildcard;
 677
 678         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 679             ("%s: invalid lookup flags %d", __func__, lookupflags));
 680
 681         INP_HASH_WLOCK_ASSERT(pcbinfo);
 682
 683         if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
 684                 struct inpcbhead *head;
 685                 /*
 686                  * Look for an unconnected (wildcard foreign addr) PCB that
 687                  * matches the local address and port we're looking for.
 688                  */
 689                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
 690                     0, pcbinfo->ipi_hashmask)];
 691                 LIST_FOREACH(inp, head, inp_hash) {
 692                         /* XXX inp locking */
 693                         if ((inp->inp_vflag & INP_IPV6) == 0)
 694                                 continue;
 695                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
 696                             IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 697                             inp->inp_lport == lport) {
 698                                 /* Found. */
 699                                 if (cred == NULL ||
 700                                     prison_equal_ip6(cred->cr_prison,
 701                                         inp->inp_cred->cr_prison))
 702                                         return (inp);
 703                         }
 704                 }
 705                 /*
 706                  * Not found.
 707                  */
 708                 return (NULL);
 709         } else {
 710                 struct inpcbporthead *porthash;
 711                 struct inpcbport *phd;
 712                 struct inpcb *match = NULL;
 713                 /*
 714                  * Best fit PCB lookup.
 715                  *
 716                  * First see if this local port is in use by looking on the
 717                  * port hash list.
 718                  */
 719                 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
 720                     pcbinfo->ipi_porthashmask)];
 721                 LIST_FOREACH(phd, porthash, phd_hash) {
 722                         if (phd->phd_port == lport)
 723                                 break;
 724                 }
 725                 if (phd != NULL) {
 726                         /*
 727                          * Port is in use by one or more PCBs. Look for best
 728                          * fit.
 729                          */
 730                         LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 731                                 wildcard = 0;
 732                                 if (cred != NULL &&
 733                                     !prison_equal_ip6(cred->cr_prison,
 734                                         inp->inp_cred->cr_prison))
 735                                         continue;
 736                                 /* XXX inp locking */
 737                                 if ((inp->inp_vflag & INP_IPV6) == 0)
 738                                         continue;
 739                                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 740                                         wildcard++;
 741                                 if (!IN6_IS_ADDR_UNSPECIFIED(
 742                                         &inp->in6p_laddr)) {
 743                                         if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 744                                                 wildcard++;
 745                                         else if (!IN6_ARE_ADDR_EQUAL(
 746                                             &inp->in6p_laddr, laddr))
 747                                                 continue;
 748                                 } else {
 749                                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 750                                                 wildcard++;
 751                                 }
 752                                 if (wildcard < matchwild) {
 753                                         match = inp;
 754                                         matchwild = wildcard;
 755                                         if (matchwild == 0)
 756                                                 break;
 757                                 }
 758                         }
 759                 }
 760                 return (match);
 761         }
 762 }
 763
 764 void
 765 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 766 {
 767         struct inpcb *in6p;
 768         struct ip6_moptions *im6o;
 769         int i, gap;
 770
 771         INP_INFO_RLOCK(pcbinfo);
 772         LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
 773                 INP_WLOCK(in6p);
 774                 im6o = in6p->in6p_moptions;
 775                 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
 776                         /*
 777                          * Unselect the outgoing ifp for multicast if it
 778                          * is being detached.
 779                          */
 780                         if (im6o->im6o_multicast_ifp == ifp)
 781                                 im6o->im6o_multicast_ifp = NULL;
 782                         /*
 783                          * Drop multicast group membership if we joined
 784                          * through the interface being detached.
 785                          */
 786                         gap = 0;
 787                         for (i = 0; i < im6o->im6o_num_memberships; i++) {
 788                                 if (im6o->im6o_membership[i]->in6m_ifp ==
 789                                     ifp) {
 790                                         in6_mc_leave(im6o->im6o_membership[i],
 791                                             NULL);
 792                                         gap++;
 793                                 } else if (gap != 0) {
 794                                         im6o->im6o_membership[i - gap] =
 795                                             im6o->im6o_membership[i];
 796                                 }
 797                         }
 798                         im6o->im6o_num_memberships -= gap;
 799                 }
 800                 INP_WUNLOCK(in6p);
 801         }
 802         INP_INFO_RUNLOCK(pcbinfo);
 803 }
 804
 805 /*
 806  * Check for alternatives when higher level complains
 807  * about service problems.  For now, invalidate cached
 808  * routing information.  If the route was created dynamically
 809  * (by a redirect), time to try a default gateway again.
 810  */
 811 void
 812 in6_losing(struct inpcb *in6p)
 813 {
 814
 815         /*
 816          * We don't store route pointers in the routing table anymore
 817          */
 818         return;
 819 }
 820
 821 /*
 822  * After a routing change, flush old routing
 823  * and allocate a (hopefully) better one.
 824  */
 825 struct inpcb *
 826 in6_rtchange(struct inpcb *inp, int errno)
 827 {
 828         /*
 829          * We don't store route pointers in the routing table anymore
 830          */
 831         return inp;
 832 }
 833
 834 #ifdef PCBGROUP
 835 /*
 836  * Lookup PCB in hash list, using pcbgroup tables.
 837  */
 838 static struct inpcb *
 839 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
 840     struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
 841     u_int lport_arg, int lookupflags, struct ifnet *ifp)
 842 {
 843         struct inpcbhead *head;
 844         struct inpcb *inp, *tmpinp;
 845         u_short fport = fport_arg, lport = lport_arg;
 846         int faith;
 847
 848         if (faithprefix_p != NULL)
 849                 faith = (*faithprefix_p)(laddr);
 850         else
 851                 faith = 0;
 852
 853         /*
 854          * First look for an exact match.
 855          */
 856         tmpinp = NULL;
 857         INP_GROUP_LOCK(pcbgroup);
 858         head = &pcbgroup->ipg_hashbase[
 859             INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
 860             pcbgroup->ipg_hashmask)];
 861         LIST_FOREACH(inp, head, inp_pcbgrouphash) {
 862                 /* XXX inp locking */
 863                 if ((inp->inp_vflag & INP_IPV6) == 0)
 864                         continue;
 865                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
 866                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 867                     inp->inp_fport == fport &&
 868                     inp->inp_lport == lport) {
 869                         /*
 870                          * XXX We should be able to directly return
 871                          * the inp here, without any checks.
 872                          * Well unless both bound with SO_REUSEPORT?
 873                          */
 874                         if (prison_flag(inp->inp_cred, PR_IP6))
 875                                 goto found;
 876                         if (tmpinp == NULL)
 877                                 tmpinp = inp;
 878                 }
 879         }
 880         if (tmpinp != NULL) {
 881                 inp = tmpinp;
 882                 goto found;
 883         }
 884
 885         /*
 886          * Then look for a wildcard match, if requested.
 887          */
 888         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
 889                 struct inpcb *local_wild = NULL, *local_exact = NULL;
 890                 struct inpcb *jail_wild = NULL;
 891                 int injail;
 892
 893                 /*
 894                  * Order of socket selection - we always prefer jails.
 895                  *      1. jailed, non-wild.
 896                  *      2. jailed, wild.
 897                  *      3. non-jailed, non-wild.
 898                  *      4. non-jailed, wild.
 899                  */
 900                 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
 901                     0, pcbinfo->ipi_wildmask)];
 902                 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
 903                         /* XXX inp locking */
 904                         if ((inp->inp_vflag & INP_IPV6) == 0)
 905                                 continue;
 906
 907                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 908                             inp->inp_lport != lport) {
 909                                 continue;
 910                         }
 911
 912                         /* XXX inp locking */
 913                         if (faith && (inp->inp_flags & INP_FAITH) == 0)
 914                                 continue;
 915
 916                         injail = prison_flag(inp->inp_cred, PR_IP6);
 917                         if (injail) {
 918                                 if (prison_check_ip6(inp->inp_cred,
 919                                     laddr) != 0)
 920                                         continue;
 921                         } else {
 922                                 if (local_exact != NULL)
 923                                         continue;
 924                         }
 925
 926                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
 927                                 if (injail)
 928                                         goto found;
 929                                 else
 930                                         local_exact = inp;
 931                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 932                                 if (injail)
 933                                         jail_wild = inp;
 934                                 else
 935                                         local_wild = inp;
 936                         }
 937                 } /* LIST_FOREACH */
 938
 939                 inp = jail_wild;
 940                 if (inp == NULL)
 941                         inp = jail_wild;
 942                 if (inp == NULL)
 943                         inp = local_exact;
 944                 if (inp == NULL)
 945                         inp = local_wild;
 946                 if (inp != NULL)
 947                         goto found;
 948         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
 949         INP_GROUP_UNLOCK(pcbgroup);
 950         return (NULL);
 951
 952 found:
 953         in_pcbref(inp);
 954         INP_GROUP_UNLOCK(pcbgroup);
 955         if (lookupflags & INPLOOKUP_WLOCKPCB) {
 956                 INP_WLOCK(inp);
 957                 if (in_pcbrele_wlocked(inp))
 958                         return (NULL);
 959         } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
 960                 INP_RLOCK(inp);
 961                 if (in_pcbrele_rlocked(inp))
 962                         return (NULL);
 963         } else
 964                 panic("%s: locking buf", __func__);
 965         return (inp);
 966 }
 967 #endif /* PCBGROUP */
 968
 969 /*
 970  * Lookup PCB in hash list.
 971  */
 972 struct inpcb *
 973 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
 974     u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
 975     int lookupflags, struct ifnet *ifp)
 976 {
 977         struct inpcbhead *head;
 978         struct inpcb *inp, *tmpinp;
 979         u_short fport = fport_arg, lport = lport_arg;
 980         int faith;
 981
 982         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 983             ("%s: invalid lookup flags %d", __func__, lookupflags));
 984
 985         INP_HASH_LOCK_ASSERT(pcbinfo);
 986
 987         if (faithprefix_p != NULL)
 988                 faith = (*faithprefix_p)(laddr);
 989         else
 990                 faith = 0;
 991
 992         /*
 993          * First look for an exact match.
 994          */
 995         tmpinp = NULL;
 996         head = &pcbinfo->ipi_hashbase[
 997             INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
 998             pcbinfo->ipi_hashmask)];
 999         LIST_FOREACH(inp, head, inp_hash) {
1000                 /* XXX inp locking */
1001                 if ((inp->inp_vflag & INP_IPV6) == 0)
1002                         continue;
1003                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1004                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1005                     inp->inp_fport == fport &&
1006                     inp->inp_lport == lport) {
1007                         /*
1008                          * XXX We should be able to directly return
1009                          * the inp here, without any checks.
1010                          * Well unless both bound with SO_REUSEPORT?
1011                          */
1012                         if (prison_flag(inp->inp_cred, PR_IP6))
1013                                 return (inp);
1014                         if (tmpinp == NULL)
1015                                 tmpinp = inp;
1016                 }
1017         }
1018         if (tmpinp != NULL)
1019                 return (tmpinp);
1020
1021         /*
1022          * Then look for a wildcard match, if requested.
1023          */
1024         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1025                 struct inpcb *local_wild = NULL, *local_exact = NULL;
1026                 struct inpcb *jail_wild = NULL;
1027                 int injail;
1028
1029                 /*
1030                  * Order of socket selection - we always prefer jails.
1031                  *      1. jailed, non-wild.
1032                  *      2. jailed, wild.
1033                  *      3. non-jailed, non-wild.
1034                  *      4. non-jailed, wild.
1035                  */
1036                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1037                     0, pcbinfo->ipi_hashmask)];
1038                 LIST_FOREACH(inp, head, inp_hash) {
1039                         /* XXX inp locking */
1040                         if ((inp->inp_vflag & INP_IPV6) == 0)
1041                                 continue;
1042
1043                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1044                             inp->inp_lport != lport) {
1045                                 continue;
1046                         }
1047
1048                         /* XXX inp locking */
1049                         if (faith && (inp->inp_flags & INP_FAITH) == 0)
1050                                 continue;
1051
1052                         injail = prison_flag(inp->inp_cred, PR_IP6);
1053                         if (injail) {
1054                                 if (prison_check_ip6(inp->inp_cred,
1055                                     laddr) != 0)
1056                                         continue;
1057                         } else {
1058                                 if (local_exact != NULL)
1059                                         continue;
1060                         }
1061
1062                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1063                                 if (injail)
1064                                         return (inp);
1065                                 else
1066                                         local_exact = inp;
1067                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1068                                 if (injail)
1069                                         jail_wild = inp;
1070                                 else
1071                                         local_wild = inp;
1072                         }
1073                 } /* LIST_FOREACH */
1074
1075                 if (jail_wild != NULL)
1076                         return (jail_wild);
1077                 if (local_exact != NULL)
1078                         return (local_exact);
1079                 if (local_wild != NULL)
1080                         return (local_wild);
1081         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1082
1083         /*
1084          * Not found.
1085          */
1086         return (NULL);
1087 }
1088
1089 /*
1090  * Lookup PCB in hash list, using pcbinfo tables.  This variation locks the
1091  * hash list lock, and will return the inpcb locked (i.e., requires
1092  * INPLOOKUP_LOCKPCB).
1093  */
1094 static struct inpcb *
1095 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1096     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1097     struct ifnet *ifp)
1098 {
1099         struct inpcb *inp;
1100
1101         INP_HASH_RLOCK(pcbinfo);
1102         inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1103             (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1104         if (inp != NULL) {
1105                 in_pcbref(inp);
1106                 INP_HASH_RUNLOCK(pcbinfo);
1107                 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1108                         INP_WLOCK(inp);
1109                         if (in_pcbrele_wlocked(inp))
1110                                 return (NULL);
1111                 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1112                         INP_RLOCK(inp);
1113                         if (in_pcbrele_rlocked(inp))
1114                                 return (NULL);
1115                 } else
1116                         panic("%s: locking bug", __func__);
1117         } else
1118                 INP_HASH_RUNLOCK(pcbinfo);
1119         return (inp);
1120 }
1121
1122 /*
1123  * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1124  * from which a pre-calculated hash value may be extracted.
1125  *
1126  * Possibly more of this logic should be in in6_pcbgroup.c.
1127  */
1128 struct inpcb *
1129 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1130     struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1131 {
1132 #if defined(PCBGROUP)
1133         struct inpcbgroup *pcbgroup;
1134 #endif
1135
1136         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1137             ("%s: invalid lookup flags %d", __func__, lookupflags));
1138         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1139             ("%s: LOCKPCB not set", __func__));
1140
1141 #if defined(PCBGROUP)
1142         if (in_pcbgroup_enabled(pcbinfo)) {
1143                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1144                     fport);
1145                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1146                     laddr, lport, lookupflags, ifp));
1147         }
1148 #endif
1149         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1150             lookupflags, ifp));
1151 }
1152
1153 struct inpcb *
1154 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1155     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1156     struct ifnet *ifp, struct mbuf *m)
1157 {
1158 #ifdef PCBGROUP
1159         struct inpcbgroup *pcbgroup;
1160 #endif
1161
1162         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1163             ("%s: invalid lookup flags %d", __func__, lookupflags));
1164         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1165             ("%s: LOCKPCB not set", __func__));
1166
1167 #ifdef PCBGROUP
1168         if (in_pcbgroup_enabled(pcbinfo)) {
1169                 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1170                     m->m_pkthdr.flowid);
1171                 if (pcbgroup != NULL)
1172                         return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1173                             fport, laddr, lport, lookupflags, ifp));
1174                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1175                     fport);
1176                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1177                     laddr, lport, lookupflags, ifp));
1178         }
1179 #endif
1180         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1181             lookupflags, ifp));
1182 }
1183
1184 void
1185 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1186 {
1187         struct ip6_hdr *ip;
1188
1189         ip = mtod(m, struct ip6_hdr *);
1190         bzero(sin6, sizeof(*sin6));
1191         sin6->sin6_len = sizeof(*sin6);
1192         sin6->sin6_family = AF_INET6;
1193         sin6->sin6_addr = ip->ip6_src;
1194
1195         (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1196
1197         return;
1198 }