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 struct  in6_addr zeroin6_addr;
 110
 111 int
 112 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
 113     struct ucred *cred)
 114 {
 115         struct socket *so = inp->inp_socket;
 116         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
 117         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 118         u_short lport = 0;
 119         int error, lookupflags = 0;
 120         int reuseport = (so->so_options & SO_REUSEPORT);
 121
 122         INP_WLOCK_ASSERT(inp);
 123         INP_HASH_WLOCK_ASSERT(pcbinfo);
 124
 125         if (TAILQ_EMPTY(&V_in6_ifaddrhead))     /* XXX broken! */
 126                 return (EADDRNOTAVAIL);
 127         if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 128                 return (EINVAL);
 129         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
 130                 lookupflags = INPLOOKUP_WILDCARD;
 131         if (nam == NULL) {
 132                 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
 133                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 134                         return (error);
 135         } else {
 136                 sin6 = (struct sockaddr_in6 *)nam;
 137                 if (nam->sa_len != sizeof(*sin6))
 138                         return (EINVAL);
 139                 /*
 140                  * family check.
 141                  */
 142                 if (nam->sa_family != AF_INET6)
 143                         return (EAFNOSUPPORT);
 144
 145                 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 146                         return(error);
 147
 148                 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
 149                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 150                         return (error);
 151
 152                 lport = sin6->sin6_port;
 153                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 154                         /*
 155                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 156                          * allow compepte duplication of binding if
 157                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 158                          * and a multicast address is bound on both
 159                          * new and duplicated sockets.
 160                          */
 161                         if (so->so_options & SO_REUSEADDR)
 162                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
 163                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 164                         struct ifaddr *ifa;
 165
 166                         sin6->sin6_port = 0;            /* yech... */
 167                         if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
 168                             NULL &&
 169                             (inp->inp_flags & INP_BINDANY) == 0) {
 170                                 return (EADDRNOTAVAIL);
 171                         }
 172
 173                         /*
 174                          * XXX: bind to an anycast address might accidentally
 175                          * cause sending a packet with anycast source address.
 176                          * We should allow to bind to a deprecated address, since
 177                          * the application dares to use it.
 178                          */
 179                         if (ifa != NULL &&
 180                             ((struct in6_ifaddr *)ifa)->ia6_flags &
 181                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
 182                                 ifa_free(ifa);
 183                                 return (EADDRNOTAVAIL);
 184                         }
 185                         if (ifa != NULL)
 186                                 ifa_free(ifa);
 187                 }
 188                 if (lport) {
 189                         struct inpcb *t;
 190                         struct tcptw *tw;
 191
 192                         /* GROSS */
 193                         if (ntohs(lport) <= V_ipport_reservedhigh &&
 194                             ntohs(lport) >= V_ipport_reservedlow &&
 195                             priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
 196                             0))
 197                                 return (EACCES);
 198                         if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
 199                             priv_check_cred(inp->inp_cred,
 200                             PRIV_NETINET_REUSEPORT, 0) != 0) {
 201                                 t = in6_pcblookup_local(pcbinfo,
 202                                     &sin6->sin6_addr, lport,
 203                                     INPLOOKUP_WILDCARD, cred);
 204                                 if (t &&
 205                                     ((t->inp_flags & INP_TIMEWAIT) == 0) &&
 206                                     (so->so_type != SOCK_STREAM ||
 207                                      IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
 208                                     (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 209                                      !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
 210                                      (t->inp_flags2 & INP_REUSEPORT) == 0) &&
 211                                     (inp->inp_cred->cr_uid !=
 212                                      t->inp_cred->cr_uid))
 213                                         return (EADDRINUSE);
 214 #ifdef INET
 215                                 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 216                                     IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 217                                         struct sockaddr_in sin;
 218
 219                                         in6_sin6_2_sin(&sin, sin6);
 220                                         t = in_pcblookup_local(pcbinfo,
 221                                             sin.sin_addr, lport,
 222                                             INPLOOKUP_WILDCARD, cred);
 223                                         if (t &&
 224                                             ((t->inp_flags &
 225                                               INP_TIMEWAIT) == 0) &&
 226                                             (so->so_type != SOCK_STREAM ||
 227                                              ntohl(t->inp_faddr.s_addr) ==
 228                                               INADDR_ANY) &&
 229                                             (inp->inp_cred->cr_uid !=
 230                                              t->inp_cred->cr_uid))
 231                                                 return (EADDRINUSE);
 232                                 }
 233 #endif
 234                         }
 235                         t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
 236                             lport, lookupflags, cred);
 237                         if (t && (t->inp_flags & INP_TIMEWAIT)) {
 238                                 /*
 239                                  * XXXRW: If an incpb has had its timewait
 240                                  * state recycled, we treat the address as
 241                                  * being in use (for now).  This is better
 242                                  * than a panic, but not desirable.
 243                                  */
 244                                 tw = intotw(t);
 245                                 if (tw == NULL ||
 246                                     (reuseport & tw->tw_so_options) == 0)
 247                                         return (EADDRINUSE);
 248                         } else if (t && (reuseport & t->inp_socket->so_options)
 249                             == 0) {
 250                                 return (EADDRINUSE);
 251                         }
 252 #ifdef INET
 253                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 254                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 255                                 struct sockaddr_in sin;
 256
 257                                 in6_sin6_2_sin(&sin, sin6);
 258                                 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
 259                                     lport, lookupflags, cred);
 260                                 if (t && t->inp_flags & INP_TIMEWAIT) {
 261                                         tw = intotw(t);
 262                                         if (tw == NULL)
 263                                                 return (EADDRINUSE);
 264                                         if ((reuseport & tw->tw_so_options) == 0
 265                                             && (ntohl(t->inp_laddr.s_addr) !=
 266                                              INADDR_ANY || ((inp->inp_vflag &
 267                                              INP_IPV6PROTO) ==
 268                                              (t->inp_vflag & INP_IPV6PROTO))))
 269                                                 return (EADDRINUSE);
 270                                 } else if (t && (reuseport == 0 ||
 271                                     (t->inp_flags2 & INP_REUSEPORT) == 0) &&
 272                                     (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
 273                                     (t->inp_vflag & INP_IPV6PROTO) != 0))
 274                                         return (EADDRINUSE);
 275                         }
 276 #endif
 277                 }
 278                 inp->in6p_laddr = sin6->sin6_addr;
 279         }
 280         if (lport == 0) {
 281                 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
 282                         /* Undo an address bind that may have occurred. */
 283                         inp->in6p_laddr = in6addr_any;
 284                         return (error);
 285                 }
 286         } else {
 287                 inp->inp_lport = lport;
 288                 if (in_pcbinshash(inp) != 0) {
 289                         inp->in6p_laddr = in6addr_any;
 290                         inp->inp_lport = 0;
 291                         return (EAGAIN);
 292                 }
 293         }
 294         return (0);
 295 }
 296
 297 /*
 298  *   Transform old in6_pcbconnect() into an inner subroutine for new
 299  *   in6_pcbconnect(): Do some validity-checking on the remote
 300  *   address (in mbuf 'nam') and then determine local host address
 301  *   (i.e., which interface) to use to access that remote host.
 302  *
 303  *   This preserves definition of in6_pcbconnect(), while supporting a
 304  *   slightly different version for T/TCP.  (This is more than
 305  *   a bit of a kludge, but cleaning up the internal interfaces would
 306  *   have forced minor changes in every protocol).
 307  */
 308 int
 309 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
 310     struct in6_addr *plocal_addr6)
 311 {
 312         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 313         int error = 0;
 314         struct ifnet *ifp = NULL;
 315         int scope_ambiguous = 0;
 316         struct in6_addr in6a;
 317
 318         INP_WLOCK_ASSERT(inp);
 319         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);        /* XXXRW: why? */
 320
 321         if (nam->sa_len != sizeof (*sin6))
 322                 return (EINVAL);
 323         if (sin6->sin6_family != AF_INET6)
 324                 return (EAFNOSUPPORT);
 325         if (sin6->sin6_port == 0)
 326                 return (EADDRNOTAVAIL);
 327
 328         if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
 329                 scope_ambiguous = 1;
 330         if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 331                 return(error);
 332
 333         if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
 334                 /*
 335                  * If the destination address is UNSPECIFIED addr,
 336                  * use the loopback addr, e.g ::1.
 337                  */
 338                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 339                         sin6->sin6_addr = in6addr_loopback;
 340         }
 341         if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 342                 return (error);
 343
 344         error = in6_selectsrc(sin6, inp->in6p_outputopts,
 345             inp, NULL, inp->inp_cred, &ifp, &in6a);
 346         if (error)
 347                 return (error);
 348
 349         if (ifp && scope_ambiguous &&
 350             (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
 351                 return(error);
 352         }
 353
 354         /*
 355          * Do not update this earlier, in case we return with an error.
 356          *
 357          * XXX: this in6_selectsrc result might replace the bound local
 358          * address with the address specified by setsockopt(IPV6_PKTINFO).
 359          * Is it the intended behavior?
 360          */
 361         *plocal_addr6 = in6a;
 362
 363         /*
 364          * Don't do pcblookup call here; return interface in
 365          * plocal_addr6
 366          * and exit to caller, that will do the lookup.
 367          */
 368
 369         return (0);
 370 }
 371
 372 /*
 373  * Outer subroutine:
 374  * Connect from a socket to a specified address.
 375  * Both address and port must be specified in argument sin.
 376  * If don't have a local address for this socket yet,
 377  * then pick one.
 378  */
 379 int
 380 in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
 381     struct ucred *cred, struct mbuf *m)
 382 {
 383         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 384         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 385         struct in6_addr addr6;
 386         int error;
 387
 388         INP_WLOCK_ASSERT(inp);
 389         INP_HASH_WLOCK_ASSERT(pcbinfo);
 390
 391         /*
 392          * Call inner routine, to assign local interface address.
 393          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 394          */
 395         if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
 396                 return (error);
 397
 398         if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
 399                                sin6->sin6_port,
 400                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 401                               ? &addr6 : &inp->in6p_laddr,
 402                               inp->inp_lport, 0, NULL) != NULL) {
 403                 return (EADDRINUSE);
 404         }
 405         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 406                 if (inp->inp_lport == 0) {
 407                         error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
 408                         if (error)
 409                                 return (error);
 410                 }
 411                 inp->in6p_laddr = addr6;
 412         }
 413         inp->in6p_faddr = sin6->sin6_addr;
 414         inp->inp_fport = sin6->sin6_port;
 415         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 416         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 417         if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
 418                 inp->inp_flow |=
 419                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 420
 421         in_pcbrehash_mbuf(inp, m);
 422
 423         return (0);
 424 }
 425
 426 int
 427 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 428 {
 429
 430         return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
 431 }
 432
 433 void
 434 in6_pcbdisconnect(struct inpcb *inp)
 435 {
 436
 437         INP_WLOCK_ASSERT(inp);
 438         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
 439
 440         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 441         inp->inp_fport = 0;
 442         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 443         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 444         in_pcbrehash(inp);
 445 }
 446
 447 struct sockaddr *
 448 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
 449 {
 450         struct sockaddr_in6 *sin6;
 451
 452         sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
 453         bzero(sin6, sizeof *sin6);
 454         sin6->sin6_family = AF_INET6;
 455         sin6->sin6_len = sizeof(*sin6);
 456         sin6->sin6_port = port;
 457         sin6->sin6_addr = *addr_p;
 458         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
 459
 460         return (struct sockaddr *)sin6;
 461 }
 462
 463 struct sockaddr *
 464 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
 465 {
 466         struct sockaddr_in sin;
 467         struct sockaddr_in6 *sin6_p;
 468
 469         bzero(&sin, sizeof sin);
 470         sin.sin_family = AF_INET;
 471         sin.sin_len = sizeof(sin);
 472         sin.sin_port = port;
 473         sin.sin_addr = *addr_p;
 474
 475         sin6_p = malloc(sizeof *sin6_p, M_SONAME,
 476                 M_WAITOK);
 477         in6_sin_2_v4mapsin6(&sin, sin6_p);
 478
 479         return (struct sockaddr *)sin6_p;
 480 }
 481
 482 int
 483 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
 484 {
 485         register struct inpcb *inp;
 486         struct in6_addr addr;
 487         in_port_t port;
 488
 489         inp = sotoinpcb(so);
 490         KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
 491
 492         INP_RLOCK(inp);
 493         port = inp->inp_lport;
 494         addr = inp->in6p_laddr;
 495         INP_RUNLOCK(inp);
 496
 497         *nam = in6_sockaddr(port, &addr);
 498         return 0;
 499 }
 500
 501 int
 502 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
 503 {
 504         struct inpcb *inp;
 505         struct in6_addr addr;
 506         in_port_t port;
 507
 508         inp = sotoinpcb(so);
 509         KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
 510
 511         INP_RLOCK(inp);
 512         port = inp->inp_fport;
 513         addr = inp->in6p_faddr;
 514         INP_RUNLOCK(inp);
 515
 516         *nam = in6_sockaddr(port, &addr);
 517         return 0;
 518 }
 519
 520 int
 521 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
 522 {
 523         struct  inpcb *inp;
 524         int     error;
 525
 526         inp = sotoinpcb(so);
 527         KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
 528
 529 #ifdef INET
 530         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 531                 error = in_getsockaddr(so, nam);
 532                 if (error == 0)
 533                         in6_sin_2_v4mapsin6_in_sock(nam);
 534         } else
 535 #endif
 536         {
 537                 /* scope issues will be handled in in6_getsockaddr(). */
 538                 error = in6_getsockaddr(so, nam);
 539         }
 540
 541         return error;
 542 }
 543
 544 int
 545 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
 546 {
 547         struct  inpcb *inp;
 548         int     error;
 549
 550         inp = sotoinpcb(so);
 551         KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
 552
 553 #ifdef INET
 554         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 555                 error = in_getpeeraddr(so, nam);
 556                 if (error == 0)
 557                         in6_sin_2_v4mapsin6_in_sock(nam);
 558         } else
 559 #endif
 560         /* scope issues will be handled in in6_getpeeraddr(). */
 561         error = in6_getpeeraddr(so, nam);
 562
 563         return error;
 564 }
 565
 566 /*
 567  * Pass some notification to all connections of a protocol
 568  * associated with address dst.  The local address and/or port numbers
 569  * may be specified to limit the search.  The "usual action" will be
 570  * taken, depending on the ctlinput cmd.  The caller must filter any
 571  * cmds that are uninteresting (e.g., no error in the map).
 572  * Call the protocol specific routine (if any) to report
 573  * any errors for each matching socket.
 574  */
 575 void
 576 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
 577     u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
 578     int cmd, void *cmdarg,
 579     struct inpcb *(*notify)(struct inpcb *, int))
 580 {
 581         struct inpcb *inp, *inp_temp;
 582         struct sockaddr_in6 sa6_src, *sa6_dst;
 583         u_short fport = fport_arg, lport = lport_arg;
 584         u_int32_t flowinfo;
 585         int errno;
 586
 587         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
 588                 return;
 589
 590         sa6_dst = (struct sockaddr_in6 *)dst;
 591         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 592                 return;
 593
 594         /*
 595          * note that src can be NULL when we get notify by local fragmentation.
 596          */
 597         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
 598         flowinfo = sa6_src.sin6_flowinfo;
 599
 600         /*
 601          * Redirects go to all references to the destination,
 602          * and use in6_rtchange to invalidate the route cache.
 603          * Dead host indications: also use in6_rtchange to invalidate
 604          * the cache, and deliver the error to all the sockets.
 605          * Otherwise, if we have knowledge of the local port and address,
 606          * deliver only to that socket.
 607          */
 608         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
 609                 fport = 0;
 610                 lport = 0;
 611                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
 612
 613                 if (cmd != PRC_HOSTDEAD)
 614                         notify = in6_rtchange;
 615         }
 616         errno = inet6ctlerrmap[cmd];
 617         INP_INFO_WLOCK(pcbinfo);
 618         LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
 619                 INP_WLOCK(inp);
 620                 if ((inp->inp_vflag & INP_IPV6) == 0) {
 621                         INP_WUNLOCK(inp);
 622                         continue;
 623                 }
 624
 625                 /*
 626                  * If the error designates a new path MTU for a destination
 627                  * and the application (associated with this socket) wanted to
 628                  * know the value, notify. Note that we notify for all
 629                  * disconnected sockets if the corresponding application
 630                  * wanted. This is because some UDP applications keep sending
 631                  * sockets disconnected.
 632                  * XXX: should we avoid to notify the value to TCP sockets?
 633                  */
 634                 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
 635                     (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 636                      IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
 637                         ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
 638                                         (u_int32_t *)cmdarg);
 639                 }
 640
 641                 /*
 642                  * Detect if we should notify the error. If no source and
 643                  * destination ports are specifed, but non-zero flowinfo and
 644                  * local address match, notify the error. This is the case
 645                  * when the error is delivered with an encrypted buffer
 646                  * by ESP. Otherwise, just compare addresses and ports
 647                  * as usual.
 648                  */
 649                 if (lport == 0 && fport == 0 && flowinfo &&
 650                     inp->inp_socket != NULL &&
 651                     flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
 652                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 653                         goto do_notify;
 654                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 655                                              &sa6_dst->sin6_addr) ||
 656                          inp->inp_socket == 0 ||
 657                          (lport && inp->inp_lport != lport) ||
 658                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 659                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 660                                               &sa6_src.sin6_addr)) ||
 661                          (fport && inp->inp_fport != fport)) {
 662                         INP_WUNLOCK(inp);
 663                         continue;
 664                 }
 665
 666           do_notify:
 667                 if (notify) {
 668                         if ((*notify)(inp, errno))
 669                                 INP_WUNLOCK(inp);
 670                 } else
 671                         INP_WUNLOCK(inp);
 672         }
 673         INP_INFO_WUNLOCK(pcbinfo);
 674 }
 675
 676 /*
 677  * Lookup a PCB based on the local address and port.  Caller must hold the
 678  * hash lock.  No inpcb locks or references are acquired.
 679  */
 680 struct inpcb *
 681 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
 682     u_short lport, int lookupflags, struct ucred *cred)
 683 {
 684         register struct inpcb *inp;
 685         int matchwild = 3, wildcard;
 686
 687         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 688             ("%s: invalid lookup flags %d", __func__, lookupflags));
 689
 690         INP_HASH_WLOCK_ASSERT(pcbinfo);
 691
 692         if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
 693                 struct inpcbhead *head;
 694                 /*
 695                  * Look for an unconnected (wildcard foreign addr) PCB that
 696                  * matches the local address and port we're looking for.
 697                  */
 698                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
 699                     0, pcbinfo->ipi_hashmask)];
 700                 LIST_FOREACH(inp, head, inp_hash) {
 701                         /* XXX inp locking */
 702                         if ((inp->inp_vflag & INP_IPV6) == 0)
 703                                 continue;
 704                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
 705                             IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 706                             inp->inp_lport == lport) {
 707                                 /* Found. */
 708                                 if (cred == NULL ||
 709                                     prison_equal_ip6(cred->cr_prison,
 710                                         inp->inp_cred->cr_prison))
 711                                         return (inp);
 712                         }
 713                 }
 714                 /*
 715                  * Not found.
 716                  */
 717                 return (NULL);
 718         } else {
 719                 struct inpcbporthead *porthash;
 720                 struct inpcbport *phd;
 721                 struct inpcb *match = NULL;
 722                 /*
 723                  * Best fit PCB lookup.
 724                  *
 725                  * First see if this local port is in use by looking on the
 726                  * port hash list.
 727                  */
 728                 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
 729                     pcbinfo->ipi_porthashmask)];
 730                 LIST_FOREACH(phd, porthash, phd_hash) {
 731                         if (phd->phd_port == lport)
 732                                 break;
 733                 }
 734                 if (phd != NULL) {
 735                         /*
 736                          * Port is in use by one or more PCBs. Look for best
 737                          * fit.
 738                          */
 739                         LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 740                                 wildcard = 0;
 741                                 if (cred != NULL &&
 742                                     !prison_equal_ip6(cred->cr_prison,
 743                                         inp->inp_cred->cr_prison))
 744                                         continue;
 745                                 /* XXX inp locking */
 746                                 if ((inp->inp_vflag & INP_IPV6) == 0)
 747                                         continue;
 748                                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 749                                         wildcard++;
 750                                 if (!IN6_IS_ADDR_UNSPECIFIED(
 751                                         &inp->in6p_laddr)) {
 752                                         if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 753                                                 wildcard++;
 754                                         else if (!IN6_ARE_ADDR_EQUAL(
 755                                             &inp->in6p_laddr, laddr))
 756                                                 continue;
 757                                 } else {
 758                                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 759                                                 wildcard++;
 760                                 }
 761                                 if (wildcard < matchwild) {
 762                                         match = inp;
 763                                         matchwild = wildcard;
 764                                         if (matchwild == 0)
 765                                                 break;
 766                                 }
 767                         }
 768                 }
 769                 return (match);
 770         }
 771 }
 772
 773 void
 774 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 775 {
 776         struct inpcb *in6p;
 777         struct ip6_moptions *im6o;
 778         int i, gap;
 779
 780         INP_INFO_RLOCK(pcbinfo);
 781         LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
 782                 INP_WLOCK(in6p);
 783                 im6o = in6p->in6p_moptions;
 784                 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
 785                         /*
 786                          * Unselect the outgoing ifp for multicast if it
 787                          * is being detached.
 788                          */
 789                         if (im6o->im6o_multicast_ifp == ifp)
 790                                 im6o->im6o_multicast_ifp = NULL;
 791                         /*
 792                          * Drop multicast group membership if we joined
 793                          * through the interface being detached.
 794                          */
 795                         gap = 0;
 796                         for (i = 0; i < im6o->im6o_num_memberships; i++) {
 797                                 if (im6o->im6o_membership[i]->in6m_ifp ==
 798                                     ifp) {
 799                                         in6_mc_leave(im6o->im6o_membership[i],
 800                                             NULL);
 801                                         gap++;
 802                                 } else if (gap != 0) {
 803                                         im6o->im6o_membership[i - gap] =
 804                                             im6o->im6o_membership[i];
 805                                 }
 806                         }
 807                         im6o->im6o_num_memberships -= gap;
 808                 }
 809                 INP_WUNLOCK(in6p);
 810         }
 811         INP_INFO_RUNLOCK(pcbinfo);
 812 }
 813
 814 /*
 815  * Check for alternatives when higher level complains
 816  * about service problems.  For now, invalidate cached
 817  * routing information.  If the route was created dynamically
 818  * (by a redirect), time to try a default gateway again.
 819  */
 820 void
 821 in6_losing(struct inpcb *in6p)
 822 {
 823
 824         /*
 825          * We don't store route pointers in the routing table anymore
 826          */
 827         return;
 828 }
 829
 830 /*
 831  * After a routing change, flush old routing
 832  * and allocate a (hopefully) better one.
 833  */
 834 struct inpcb *
 835 in6_rtchange(struct inpcb *inp, int errno)
 836 {
 837         /*
 838          * We don't store route pointers in the routing table anymore
 839          */
 840         return inp;
 841 }
 842
 843 #ifdef PCBGROUP
 844 /*
 845  * Lookup PCB in hash list, using pcbgroup tables.
 846  */
 847 static struct inpcb *
 848 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
 849     struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
 850     u_int lport_arg, int lookupflags, struct ifnet *ifp)
 851 {
 852         struct inpcbhead *head;
 853         struct inpcb *inp, *tmpinp;
 854         u_short fport = fport_arg, lport = lport_arg;
 855         int faith;
 856
 857         if (faithprefix_p != NULL)
 858                 faith = (*faithprefix_p)(laddr);
 859         else
 860                 faith = 0;
 861
 862         /*
 863          * First look for an exact match.
 864          */
 865         tmpinp = NULL;
 866         INP_GROUP_LOCK(pcbgroup);
 867         head = &pcbgroup->ipg_hashbase[
 868             INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
 869             pcbgroup->ipg_hashmask)];
 870         LIST_FOREACH(inp, head, inp_pcbgrouphash) {
 871                 /* XXX inp locking */
 872                 if ((inp->inp_vflag & INP_IPV6) == 0)
 873                         continue;
 874                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
 875                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 876                     inp->inp_fport == fport &&
 877                     inp->inp_lport == lport) {
 878                         /*
 879                          * XXX We should be able to directly return
 880                          * the inp here, without any checks.
 881                          * Well unless both bound with SO_REUSEPORT?
 882                          */
 883                         if (prison_flag(inp->inp_cred, PR_IP6))
 884                                 goto found;
 885                         if (tmpinp == NULL)
 886                                 tmpinp = inp;
 887                 }
 888         }
 889         if (tmpinp != NULL) {
 890                 inp = tmpinp;
 891                 goto found;
 892         }
 893
 894         /*
 895          * Then look for a wildcard match, if requested.
 896          */
 897         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
 898                 struct inpcb *local_wild = NULL, *local_exact = NULL;
 899                 struct inpcb *jail_wild = NULL;
 900                 int injail;
 901
 902                 /*
 903                  * Order of socket selection - we always prefer jails.
 904                  *      1. jailed, non-wild.
 905                  *      2. jailed, wild.
 906                  *      3. non-jailed, non-wild.
 907                  *      4. non-jailed, wild.
 908                  */
 909                 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
 910                     0, pcbinfo->ipi_wildmask)];
 911                 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
 912                         /* XXX inp locking */
 913                         if ((inp->inp_vflag & INP_IPV6) == 0)
 914                                 continue;
 915
 916                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 917                             inp->inp_lport != lport) {
 918                                 continue;
 919                         }
 920
 921                         /* XXX inp locking */
 922                         if (faith && (inp->inp_flags & INP_FAITH) == 0)
 923                                 continue;
 924
 925                         injail = prison_flag(inp->inp_cred, PR_IP6);
 926                         if (injail) {
 927                                 if (prison_check_ip6(inp->inp_cred,
 928                                     laddr) != 0)
 929                                         continue;
 930                         } else {
 931                                 if (local_exact != NULL)
 932                                         continue;
 933                         }
 934
 935                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
 936                                 if (injail)
 937                                         goto found;
 938                                 else
 939                                         local_exact = inp;
 940                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 941                                 if (injail)
 942                                         jail_wild = inp;
 943                                 else
 944                                         local_wild = inp;
 945                         }
 946                 } /* LIST_FOREACH */
 947
 948                 inp = jail_wild;
 949                 if (inp == NULL)
 950                         inp = jail_wild;
 951                 if (inp == NULL)
 952                         inp = local_exact;
 953                 if (inp == NULL)
 954                         inp = local_wild;
 955                 if (inp != NULL)
 956                         goto found;
 957         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
 958         INP_GROUP_UNLOCK(pcbgroup);
 959         return (NULL);
 960
 961 found:
 962         in_pcbref(inp);
 963         INP_GROUP_UNLOCK(pcbgroup);
 964         if (lookupflags & INPLOOKUP_WLOCKPCB) {
 965                 INP_WLOCK(inp);
 966                 if (in_pcbrele_wlocked(inp))
 967                         return (NULL);
 968         } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
 969                 INP_RLOCK(inp);
 970                 if (in_pcbrele_rlocked(inp))
 971                         return (NULL);
 972         } else
 973                 panic("%s: locking buf", __func__);
 974         return (inp);
 975 }
 976 #endif /* PCBGROUP */
 977
 978 /*
 979  * Lookup PCB in hash list.
 980  */
 981 struct inpcb *
 982 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
 983     u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
 984     int lookupflags, struct ifnet *ifp)
 985 {
 986         struct inpcbhead *head;
 987         struct inpcb *inp, *tmpinp;
 988         u_short fport = fport_arg, lport = lport_arg;
 989         int faith;
 990
 991         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 992             ("%s: invalid lookup flags %d", __func__, lookupflags));
 993
 994         INP_HASH_LOCK_ASSERT(pcbinfo);
 995
 996         if (faithprefix_p != NULL)
 997                 faith = (*faithprefix_p)(laddr);
 998         else
 999                 faith = 0;
1000
1001         /*
1002          * First look for an exact match.
1003          */
1004         tmpinp = NULL;
1005         head = &pcbinfo->ipi_hashbase[
1006             INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
1007             pcbinfo->ipi_hashmask)];
1008         LIST_FOREACH(inp, head, inp_hash) {
1009                 /* XXX inp locking */
1010                 if ((inp->inp_vflag & INP_IPV6) == 0)
1011                         continue;
1012                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1013                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1014                     inp->inp_fport == fport &&
1015                     inp->inp_lport == lport) {
1016                         /*
1017                          * XXX We should be able to directly return
1018                          * the inp here, without any checks.
1019                          * Well unless both bound with SO_REUSEPORT?
1020                          */
1021                         if (prison_flag(inp->inp_cred, PR_IP6))
1022                                 return (inp);
1023                         if (tmpinp == NULL)
1024                                 tmpinp = inp;
1025                 }
1026         }
1027         if (tmpinp != NULL)
1028                 return (tmpinp);
1029
1030         /*
1031          * Then look for a wildcard match, if requested.
1032          */
1033         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1034                 struct inpcb *local_wild = NULL, *local_exact = NULL;
1035                 struct inpcb *jail_wild = NULL;
1036                 int injail;
1037
1038                 /*
1039                  * Order of socket selection - we always prefer jails.
1040                  *      1. jailed, non-wild.
1041                  *      2. jailed, wild.
1042                  *      3. non-jailed, non-wild.
1043                  *      4. non-jailed, wild.
1044                  */
1045                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1046                     0, pcbinfo->ipi_hashmask)];
1047                 LIST_FOREACH(inp, head, inp_hash) {
1048                         /* XXX inp locking */
1049                         if ((inp->inp_vflag & INP_IPV6) == 0)
1050                                 continue;
1051
1052                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1053                             inp->inp_lport != lport) {
1054                                 continue;
1055                         }
1056
1057                         /* XXX inp locking */
1058                         if (faith && (inp->inp_flags & INP_FAITH) == 0)
1059                                 continue;
1060
1061                         injail = prison_flag(inp->inp_cred, PR_IP6);
1062                         if (injail) {
1063                                 if (prison_check_ip6(inp->inp_cred,
1064                                     laddr) != 0)
1065                                         continue;
1066                         } else {
1067                                 if (local_exact != NULL)
1068                                         continue;
1069                         }
1070
1071                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1072                                 if (injail)
1073                                         return (inp);
1074                                 else
1075                                         local_exact = inp;
1076                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1077                                 if (injail)
1078                                         jail_wild = inp;
1079                                 else
1080                                         local_wild = inp;
1081                         }
1082                 } /* LIST_FOREACH */
1083
1084                 if (jail_wild != NULL)
1085                         return (jail_wild);
1086                 if (local_exact != NULL)
1087                         return (local_exact);
1088                 if (local_wild != NULL)
1089                         return (local_wild);
1090         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1091
1092         /*
1093          * Not found.
1094          */
1095         return (NULL);
1096 }
1097
1098 /*
1099  * Lookup PCB in hash list, using pcbinfo tables.  This variation locks the
1100  * hash list lock, and will return the inpcb locked (i.e., requires
1101  * INPLOOKUP_LOCKPCB).
1102  */
1103 static struct inpcb *
1104 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1105     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1106     struct ifnet *ifp)
1107 {
1108         struct inpcb *inp;
1109
1110         INP_HASH_RLOCK(pcbinfo);
1111         inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1112             (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1113         if (inp != NULL) {
1114                 in_pcbref(inp);
1115                 INP_HASH_RUNLOCK(pcbinfo);
1116                 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1117                         INP_WLOCK(inp);
1118                         if (in_pcbrele_wlocked(inp))
1119                                 return (NULL);
1120                 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1121                         INP_RLOCK(inp);
1122                         if (in_pcbrele_rlocked(inp))
1123                                 return (NULL);
1124                 } else
1125                         panic("%s: locking bug", __func__);
1126         } else
1127                 INP_HASH_RUNLOCK(pcbinfo);
1128         return (inp);
1129 }
1130
1131 /*
1132  * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1133  * from which a pre-calculated hash value may be extracted.
1134  *
1135  * Possibly more of this logic should be in in6_pcbgroup.c.
1136  */
1137 struct inpcb *
1138 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1139     struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1140 {
1141 #if defined(PCBGROUP)
1142         struct inpcbgroup *pcbgroup;
1143 #endif
1144
1145         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1146             ("%s: invalid lookup flags %d", __func__, lookupflags));
1147         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1148             ("%s: LOCKPCB not set", __func__));
1149
1150 #if defined(PCBGROUP)
1151         if (in_pcbgroup_enabled(pcbinfo)) {
1152                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1153                     fport);
1154                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1155                     laddr, lport, lookupflags, ifp));
1156         }
1157 #endif
1158         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1159             lookupflags, ifp));
1160 }
1161
1162 struct inpcb *
1163 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1164     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1165     struct ifnet *ifp, struct mbuf *m)
1166 {
1167 #ifdef PCBGROUP
1168         struct inpcbgroup *pcbgroup;
1169 #endif
1170
1171         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1172             ("%s: invalid lookup flags %d", __func__, lookupflags));
1173         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1174             ("%s: LOCKPCB not set", __func__));
1175
1176 #ifdef PCBGROUP
1177         if (in_pcbgroup_enabled(pcbinfo)) {
1178                 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1179                     m->m_pkthdr.flowid);
1180                 if (pcbgroup != NULL)
1181                         return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1182                             fport, laddr, lport, lookupflags, ifp));
1183                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1184                     fport);
1185                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1186                     laddr, lport, lookupflags, ifp));
1187         }
1188 #endif
1189         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1190             lookupflags, ifp));
1191 }
1192
1193 void
1194 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1195 {
1196         struct ip6_hdr *ip;
1197
1198         ip = mtod(m, struct ip6_hdr *);
1199         bzero(sin6, sizeof(*sin6));
1200         sin6->sin6_len = sizeof(*sin6);
1201         sin6->sin6_family = AF_INET6;
1202         sin6->sin6_addr = ip->ip6_src;
1203
1204         (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1205
1206         return;
1207 }