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