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_var.h>
  94 #include <net/if_types.h>
  95 #include <net/route.h>
  96
  97 #include <netinet/in.h>
  98 #include <netinet/in_var.h>
  99 #include <netinet/in_systm.h>
 100 #include <netinet/tcp_var.h>
 101 #include <netinet/ip6.h>
 102 #include <netinet/ip_var.h>
 103
 104 #include <netinet6/ip6_var.h>
 105 #include <netinet6/nd6.h>
 106 #include <netinet/in_pcb.h>
 107 #include <netinet6/in6_pcb.h>
 108 #include <netinet6/scope6_var.h>
 109
 110 int
 111 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
 112     struct ucred *cred)
 113 {
 114         struct socket *so = inp->inp_socket;
 115         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
 116         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 117         u_short lport = 0;
 118         int error, lookupflags = 0;
 119         int reuseport = (so->so_options & SO_REUSEPORT);
 120
 121         INP_WLOCK_ASSERT(inp);
 122         INP_HASH_WLOCK_ASSERT(pcbinfo);
 123
 124         if (TAILQ_EMPTY(&V_in6_ifaddrhead))     /* XXX broken! */
 125                 return (EADDRNOTAVAIL);
 126         if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 127                 return (EINVAL);
 128         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
 129                 lookupflags = INPLOOKUP_WILDCARD;
 130         if (nam == NULL) {
 131                 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
 132                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 133                         return (error);
 134         } else {
 135                 sin6 = (struct sockaddr_in6 *)nam;
 136                 if (nam->sa_len != sizeof(*sin6))
 137                         return (EINVAL);
 138                 /*
 139                  * family check.
 140                  */
 141                 if (nam->sa_family != AF_INET6)
 142                         return (EAFNOSUPPORT);
 143
 144                 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 145                         return(error);
 146
 147                 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
 148                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 149                         return (error);
 150
 151                 lport = sin6->sin6_port;
 152                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 153                         /*
 154                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 155                          * allow compepte duplication of binding if
 156                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 157                          * and a multicast address is bound on both
 158                          * new and duplicated sockets.
 159                          */
 160                         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
 161                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
 162                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 163                         struct ifaddr *ifa;
 164
 165                         sin6->sin6_port = 0;            /* yech... */
 166                         if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
 167                             NULL &&
 168                             (inp->inp_flags & INP_BINDANY) == 0) {
 169                                 return (EADDRNOTAVAIL);
 170                         }
 171
 172                         /*
 173                          * XXX: bind to an anycast address might accidentally
 174                          * cause sending a packet with anycast source address.
 175                          * We should allow to bind to a deprecated address, since
 176                          * the application dares to use it.
 177                          */
 178                         if (ifa != NULL &&
 179                             ((struct in6_ifaddr *)ifa)->ia6_flags &
 180                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
 181                                 ifa_free(ifa);
 182                                 return (EADDRNOTAVAIL);
 183                         }
 184                         if (ifa != NULL)
 185                                 ifa_free(ifa);
 186                 }
 187                 if (lport) {
 188                         struct inpcb *t;
 189                         struct tcptw *tw;
 190
 191                         /* GROSS */
 192                         if (ntohs(lport) <= V_ipport_reservedhigh &&
 193                             ntohs(lport) >= V_ipport_reservedlow &&
 194                             priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
 195                             0))
 196                                 return (EACCES);
 197                         if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
 198                             priv_check_cred(inp->inp_cred,
 199                             PRIV_NETINET_REUSEPORT, 0) != 0) {
 200                                 t = in6_pcblookup_local(pcbinfo,
 201                                     &sin6->sin6_addr, lport,
 202                                     INPLOOKUP_WILDCARD, cred);
 203                                 if (t &&
 204                                     ((t->inp_flags & INP_TIMEWAIT) == 0) &&
 205                                     (so->so_type != SOCK_STREAM ||
 206                                      IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
 207                                     (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 208                                      !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
 209                                      (t->inp_flags2 & INP_REUSEPORT) == 0) &&
 210                                     (inp->inp_cred->cr_uid !=
 211                                      t->inp_cred->cr_uid))
 212                                         return (EADDRINUSE);
 213 #ifdef INET
 214                                 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 215                                     IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 216                                         struct sockaddr_in sin;
 217
 218                                         in6_sin6_2_sin(&sin, sin6);
 219                                         t = in_pcblookup_local(pcbinfo,
 220                                             sin.sin_addr, lport,
 221                                             INPLOOKUP_WILDCARD, cred);
 222                                         if (t &&
 223                                             ((t->inp_flags &
 224                                               INP_TIMEWAIT) == 0) &&
 225                                             (so->so_type != SOCK_STREAM ||
 226                                              ntohl(t->inp_faddr.s_addr) ==
 227                                               INADDR_ANY) &&
 228                                             (inp->inp_cred->cr_uid !=
 229                                              t->inp_cred->cr_uid))
 230                                                 return (EADDRINUSE);
 231                                 }
 232 #endif
 233                         }
 234                         t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
 235                             lport, lookupflags, cred);
 236                         if (t && (t->inp_flags & INP_TIMEWAIT)) {
 237                                 /*
 238                                  * XXXRW: If an incpb has had its timewait
 239                                  * state recycled, we treat the address as
 240                                  * being in use (for now).  This is better
 241                                  * than a panic, but not desirable.
 242                                  */
 243                                 tw = intotw(t);
 244                                 if (tw == NULL ||
 245                                     (reuseport & tw->tw_so_options) == 0)
 246                                         return (EADDRINUSE);
 247                         } else if (t && (reuseport & inp_so_options(t)) == 0) {
 248                                 return (EADDRINUSE);
 249                         }
 250 #ifdef INET
 251                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 252                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 253                                 struct sockaddr_in sin;
 254
 255                                 in6_sin6_2_sin(&sin, sin6);
 256                                 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
 257                                     lport, lookupflags, cred);
 258                                 if (t && t->inp_flags & INP_TIMEWAIT) {
 259                                         tw = intotw(t);
 260                                         if (tw == NULL)
 261                                                 return (EADDRINUSE);
 262                                         if ((reuseport & tw->tw_so_options) == 0
 263                                             && (ntohl(t->inp_laddr.s_addr) !=
 264                                              INADDR_ANY || ((inp->inp_vflag &
 265                                              INP_IPV6PROTO) ==
 266                                              (t->inp_vflag & INP_IPV6PROTO))))
 267                                                 return (EADDRINUSE);
 268                                 } else if (t &&
 269                                     (reuseport & inp_so_options(t)) == 0 &&
 270                                     (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
 271                                     (t->inp_vflag & INP_IPV6PROTO) != 0))
 272                                         return (EADDRINUSE);
 273                         }
 274 #endif
 275                 }
 276                 inp->in6p_laddr = sin6->sin6_addr;
 277         }
 278         if (lport == 0) {
 279                 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
 280                         /* Undo an address bind that may have occurred. */
 281                         inp->in6p_laddr = in6addr_any;
 282                         return (error);
 283                 }
 284         } else {
 285                 inp->inp_lport = lport;
 286                 if (in_pcbinshash(inp) != 0) {
 287                         inp->in6p_laddr = in6addr_any;
 288                         inp->inp_lport = 0;
 289                         return (EAGAIN);
 290                 }
 291         }
 292         return (0);
 293 }
 294
 295 /*
 296  *   Transform old in6_pcbconnect() into an inner subroutine for new
 297  *   in6_pcbconnect(): Do some validity-checking on the remote
 298  *   address (in mbuf 'nam') and then determine local host address
 299  *   (i.e., which interface) to use to access that remote host.
 300  *
 301  *   This preserves definition of in6_pcbconnect(), while supporting a
 302  *   slightly different version for T/TCP.  (This is more than
 303  *   a bit of a kludge, but cleaning up the internal interfaces would
 304  *   have forced minor changes in every protocol).
 305  */
 306 int
 307 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
 308     struct in6_addr *plocal_addr6)
 309 {
 310         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 311         int error = 0;
 312         struct ifnet *ifp = NULL;
 313         int scope_ambiguous = 0;
 314         struct in6_addr in6a;
 315
 316         INP_WLOCK_ASSERT(inp);
 317         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);        /* XXXRW: why? */
 318
 319         if (nam->sa_len != sizeof (*sin6))
 320                 return (EINVAL);
 321         if (sin6->sin6_family != AF_INET6)
 322                 return (EAFNOSUPPORT);
 323         if (sin6->sin6_port == 0)
 324                 return (EADDRNOTAVAIL);
 325
 326         if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
 327                 scope_ambiguous = 1;
 328         if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 329                 return(error);
 330
 331         if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
 332                 /*
 333                  * If the destination address is UNSPECIFIED addr,
 334                  * use the loopback addr, e.g ::1.
 335                  */
 336                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 337                         sin6->sin6_addr = in6addr_loopback;
 338         }
 339         if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 340                 return (error);
 341
 342         error = in6_selectsrc(sin6, inp->in6p_outputopts,
 343             inp, NULL, inp->inp_cred, &ifp, &in6a);
 344         if (error)
 345                 return (error);
 346
 347         if (ifp && scope_ambiguous &&
 348             (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
 349                 return(error);
 350         }
 351
 352         /*
 353          * Do not update this earlier, in case we return with an error.
 354          *
 355          * XXX: this in6_selectsrc result might replace the bound local
 356          * address with the address specified by setsockopt(IPV6_PKTINFO).
 357          * Is it the intended behavior?
 358          */
 359         *plocal_addr6 = in6a;
 360
 361         /*
 362          * Don't do pcblookup call here; return interface in
 363          * plocal_addr6
 364          * and exit to caller, that will do the lookup.
 365          */
 366
 367         return (0);
 368 }
 369
 370 /*
 371  * Outer subroutine:
 372  * Connect from a socket to a specified address.
 373  * Both address and port must be specified in argument sin.
 374  * If don't have a local address for this socket yet,
 375  * then pick one.
 376  */
 377 int
 378 in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
 379     struct ucred *cred, struct mbuf *m)
 380 {
 381         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 382         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 383         struct in6_addr addr6;
 384         int error;
 385
 386         INP_WLOCK_ASSERT(inp);
 387         INP_HASH_WLOCK_ASSERT(pcbinfo);
 388
 389         /*
 390          * Call inner routine, to assign local interface address.
 391          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 392          */
 393         if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
 394                 return (error);
 395
 396         if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
 397                                sin6->sin6_port,
 398                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 399                               ? &addr6 : &inp->in6p_laddr,
 400                               inp->inp_lport, 0, NULL) != NULL) {
 401                 return (EADDRINUSE);
 402         }
 403         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 404                 if (inp->inp_lport == 0) {
 405                         error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
 406                         if (error)
 407                                 return (error);
 408                 }
 409                 inp->in6p_laddr = addr6;
 410         }
 411         inp->in6p_faddr = sin6->sin6_addr;
 412         inp->inp_fport = sin6->sin6_port;
 413         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 414         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 415         if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
 416                 inp->inp_flow |=
 417                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 418
 419         in_pcbrehash_mbuf(inp, m);
 420
 421         return (0);
 422 }
 423
 424 int
 425 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 426 {
 427
 428         return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
 429 }
 430
 431 void
 432 in6_pcbdisconnect(struct inpcb *inp)
 433 {
 434
 435         INP_WLOCK_ASSERT(inp);
 436         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
 437
 438         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 439         inp->inp_fport = 0;
 440         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 441         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 442         in_pcbrehash(inp);
 443 }
 444
 445 struct sockaddr *
 446 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
 447 {
 448         struct sockaddr_in6 *sin6;
 449
 450         sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
 451         bzero(sin6, sizeof *sin6);
 452         sin6->sin6_family = AF_INET6;
 453         sin6->sin6_len = sizeof(*sin6);
 454         sin6->sin6_port = port;
 455         sin6->sin6_addr = *addr_p;
 456         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
 457
 458         return (struct sockaddr *)sin6;
 459 }
 460
 461 struct sockaddr *
 462 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
 463 {
 464         struct sockaddr_in sin;
 465         struct sockaddr_in6 *sin6_p;
 466
 467         bzero(&sin, sizeof sin);
 468         sin.sin_family = AF_INET;
 469         sin.sin_len = sizeof(sin);
 470         sin.sin_port = port;
 471         sin.sin_addr = *addr_p;
 472
 473         sin6_p = malloc(sizeof *sin6_p, M_SONAME,
 474                 M_WAITOK);
 475         in6_sin_2_v4mapsin6(&sin, sin6_p);
 476
 477         return (struct sockaddr *)sin6_p;
 478 }
 479
 480 int
 481 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
 482 {
 483         register struct inpcb *inp;
 484         struct in6_addr addr;
 485         in_port_t port;
 486
 487         inp = sotoinpcb(so);
 488         KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
 489
 490         INP_RLOCK(inp);
 491         port = inp->inp_lport;
 492         addr = inp->in6p_laddr;
 493         INP_RUNLOCK(inp);
 494
 495         *nam = in6_sockaddr(port, &addr);
 496         return 0;
 497 }
 498
 499 int
 500 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
 501 {
 502         struct inpcb *inp;
 503         struct in6_addr addr;
 504         in_port_t port;
 505
 506         inp = sotoinpcb(so);
 507         KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
 508
 509         INP_RLOCK(inp);
 510         port = inp->inp_fport;
 511         addr = inp->in6p_faddr;
 512         INP_RUNLOCK(inp);
 513
 514         *nam = in6_sockaddr(port, &addr);
 515         return 0;
 516 }
 517
 518 int
 519 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
 520 {
 521         struct  inpcb *inp;
 522         int     error;
 523
 524         inp = sotoinpcb(so);
 525         KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
 526
 527 #ifdef INET
 528         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 529                 error = in_getsockaddr(so, nam);
 530                 if (error == 0)
 531                         in6_sin_2_v4mapsin6_in_sock(nam);
 532         } else
 533 #endif
 534         {
 535                 /* scope issues will be handled in in6_getsockaddr(). */
 536                 error = in6_getsockaddr(so, nam);
 537         }
 538
 539         return error;
 540 }
 541
 542 int
 543 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
 544 {
 545         struct  inpcb *inp;
 546         int     error;
 547
 548         inp = sotoinpcb(so);
 549         KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
 550
 551 #ifdef INET
 552         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 553                 error = in_getpeeraddr(so, nam);
 554                 if (error == 0)
 555                         in6_sin_2_v4mapsin6_in_sock(nam);
 556         } else
 557 #endif
 558         /* scope issues will be handled in in6_getpeeraddr(). */
 559         error = in6_getpeeraddr(so, nam);
 560
 561         return error;
 562 }
 563
 564 /*
 565  * Pass some notification to all connections of a protocol
 566  * associated with address dst.  The local address and/or port numbers
 567  * may be specified to limit the search.  The "usual action" will be
 568  * taken, depending on the ctlinput cmd.  The caller must filter any
 569  * cmds that are uninteresting (e.g., no error in the map).
 570  * Call the protocol specific routine (if any) to report
 571  * any errors for each matching socket.
 572  */
 573 void
 574 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
 575     u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
 576     int cmd, void *cmdarg,
 577     struct inpcb *(*notify)(struct inpcb *, int))
 578 {
 579         struct inpcb *inp, *inp_temp;
 580         struct sockaddr_in6 sa6_src, *sa6_dst;
 581         u_short fport = fport_arg, lport = lport_arg;
 582         u_int32_t flowinfo;
 583         int errno;
 584
 585         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
 586                 return;
 587
 588         sa6_dst = (struct sockaddr_in6 *)dst;
 589         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 590                 return;
 591
 592         /*
 593          * note that src can be NULL when we get notify by local fragmentation.
 594          */
 595         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
 596         flowinfo = sa6_src.sin6_flowinfo;
 597
 598         /*
 599          * Redirects go to all references to the destination,
 600          * and use in6_rtchange to invalidate the route cache.
 601          * Dead host indications: also use in6_rtchange to invalidate
 602          * the cache, and deliver the error to all the sockets.
 603          * Otherwise, if we have knowledge of the local port and address,
 604          * deliver only to that socket.
 605          */
 606         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
 607                 fport = 0;
 608                 lport = 0;
 609                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
 610
 611                 if (cmd != PRC_HOSTDEAD)
 612                         notify = in6_rtchange;
 613         }
 614         errno = inet6ctlerrmap[cmd];
 615         INP_INFO_WLOCK(pcbinfo);
 616         LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
 617                 INP_WLOCK(inp);
 618                 if ((inp->inp_vflag & INP_IPV6) == 0) {
 619                         INP_WUNLOCK(inp);
 620                         continue;
 621                 }
 622
 623                 /*
 624                  * If the error designates a new path MTU for a destination
 625                  * and the application (associated with this socket) wanted to
 626                  * know the value, notify. Note that we notify for all
 627                  * disconnected sockets if the corresponding application
 628                  * wanted. This is because some UDP applications keep sending
 629                  * sockets disconnected.
 630                  * XXX: should we avoid to notify the value to TCP sockets?
 631                  */
 632                 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
 633                     (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 634                      IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
 635                         ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
 636                                         (u_int32_t *)cmdarg);
 637                 }
 638
 639                 /*
 640                  * Detect if we should notify the error. If no source and
 641                  * destination ports are specifed, but non-zero flowinfo and
 642                  * local address match, notify the error. This is the case
 643                  * when the error is delivered with an encrypted buffer
 644                  * by ESP. Otherwise, just compare addresses and ports
 645                  * as usual.
 646                  */
 647                 if (lport == 0 && fport == 0 && flowinfo &&
 648                     inp->inp_socket != NULL &&
 649                     flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
 650                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 651                         goto do_notify;
 652                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 653                                              &sa6_dst->sin6_addr) ||
 654                          inp->inp_socket == 0 ||
 655                          (lport && inp->inp_lport != lport) ||
 656                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 657                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 658                                               &sa6_src.sin6_addr)) ||
 659                          (fport && inp->inp_fport != fport)) {
 660                         INP_WUNLOCK(inp);
 661                         continue;
 662                 }
 663
 664           do_notify:
 665                 if (notify) {
 666                         if ((*notify)(inp, errno))
 667                                 INP_WUNLOCK(inp);
 668                 } else
 669                         INP_WUNLOCK(inp);
 670         }
 671         INP_INFO_WUNLOCK(pcbinfo);
 672 }
 673
 674 /*
 675  * Lookup a PCB based on the local address and port.  Caller must hold the
 676  * hash lock.  No inpcb locks or references are acquired.
 677  */
 678 struct inpcb *
 679 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
 680     u_short lport, int lookupflags, struct ucred *cred)
 681 {
 682         register struct inpcb *inp;
 683         int matchwild = 3, wildcard;
 684
 685         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 686             ("%s: invalid lookup flags %d", __func__, lookupflags));
 687
 688         INP_HASH_WLOCK_ASSERT(pcbinfo);
 689
 690         if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
 691                 struct inpcbhead *head;
 692                 /*
 693                  * Look for an unconnected (wildcard foreign addr) PCB that
 694                  * matches the local address and port we're looking for.
 695                  */
 696                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
 697                     0, pcbinfo->ipi_hashmask)];
 698                 LIST_FOREACH(inp, head, inp_hash) {
 699                         /* XXX inp locking */
 700                         if ((inp->inp_vflag & INP_IPV6) == 0)
 701                                 continue;
 702                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
 703                             IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 704                             inp->inp_lport == lport) {
 705                                 /* Found. */
 706                                 if (cred == NULL ||
 707                                     prison_equal_ip6(cred->cr_prison,
 708                                         inp->inp_cred->cr_prison))
 709                                         return (inp);
 710                         }
 711                 }
 712                 /*
 713                  * Not found.
 714                  */
 715                 return (NULL);
 716         } else {
 717                 struct inpcbporthead *porthash;
 718                 struct inpcbport *phd;
 719                 struct inpcb *match = NULL;
 720                 /*
 721                  * Best fit PCB lookup.
 722                  *
 723                  * First see if this local port is in use by looking on the
 724                  * port hash list.
 725                  */
 726                 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
 727                     pcbinfo->ipi_porthashmask)];
 728                 LIST_FOREACH(phd, porthash, phd_hash) {
 729                         if (phd->phd_port == lport)
 730                                 break;
 731                 }
 732                 if (phd != NULL) {
 733                         /*
 734                          * Port is in use by one or more PCBs. Look for best
 735                          * fit.
 736                          */
 737                         LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 738                                 wildcard = 0;
 739                                 if (cred != NULL &&
 740                                     !prison_equal_ip6(cred->cr_prison,
 741                                         inp->inp_cred->cr_prison))
 742                                         continue;
 743                                 /* XXX inp locking */
 744                                 if ((inp->inp_vflag & INP_IPV6) == 0)
 745                                         continue;
 746                                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 747                                         wildcard++;
 748                                 if (!IN6_IS_ADDR_UNSPECIFIED(
 749                                         &inp->in6p_laddr)) {
 750                                         if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 751                                                 wildcard++;
 752                                         else if (!IN6_ARE_ADDR_EQUAL(
 753                                             &inp->in6p_laddr, laddr))
 754                                                 continue;
 755                                 } else {
 756                                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 757                                                 wildcard++;
 758                                 }
 759                                 if (wildcard < matchwild) {
 760                                         match = inp;
 761                                         matchwild = wildcard;
 762                                         if (matchwild == 0)
 763                                                 break;
 764                                 }
 765                         }
 766                 }
 767                 return (match);
 768         }
 769 }
 770
 771 void
 772 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 773 {
 774         struct inpcb *in6p;
 775         struct ip6_moptions *im6o;
 776         int i, gap;
 777
 778         INP_INFO_RLOCK(pcbinfo);
 779         LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
 780                 INP_WLOCK(in6p);
 781                 im6o = in6p->in6p_moptions;
 782                 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
 783                         /*
 784                          * Unselect the outgoing ifp for multicast if it
 785                          * is being detached.
 786                          */
 787                         if (im6o->im6o_multicast_ifp == ifp)
 788                                 im6o->im6o_multicast_ifp = NULL;
 789                         /*
 790                          * Drop multicast group membership if we joined
 791                          * through the interface being detached.
 792                          */
 793                         gap = 0;
 794                         for (i = 0; i < im6o->im6o_num_memberships; i++) {
 795                                 if (im6o->im6o_membership[i]->in6m_ifp ==
 796                                     ifp) {
 797                                         in6_mc_leave(im6o->im6o_membership[i],
 798                                             NULL);
 799                                         gap++;
 800                                 } else if (gap != 0) {
 801                                         im6o->im6o_membership[i - gap] =
 802                                             im6o->im6o_membership[i];
 803                                 }
 804                         }
 805                         im6o->im6o_num_memberships -= gap;
 806                 }
 807                 INP_WUNLOCK(in6p);
 808         }
 809         INP_INFO_RUNLOCK(pcbinfo);
 810 }
 811
 812 /*
 813  * Check for alternatives when higher level complains
 814  * about service problems.  For now, invalidate cached
 815  * routing information.  If the route was created dynamically
 816  * (by a redirect), time to try a default gateway again.
 817  */
 818 void
 819 in6_losing(struct inpcb *in6p)
 820 {
 821
 822         /*
 823          * We don't store route pointers in the routing table anymore
 824          */
 825         return;
 826 }
 827
 828 /*
 829  * After a routing change, flush old routing
 830  * and allocate a (hopefully) better one.
 831  */
 832 struct inpcb *
 833 in6_rtchange(struct inpcb *inp, int errno)
 834 {
 835         /*
 836          * We don't store route pointers in the routing table anymore
 837          */
 838         return inp;
 839 }
 840
 841 #ifdef PCBGROUP
 842 /*
 843  * Lookup PCB in hash list, using pcbgroup tables.
 844  */
 845 static struct inpcb *
 846 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
 847     struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
 848     u_int lport_arg, int lookupflags, struct ifnet *ifp)
 849 {
 850         struct inpcbhead *head;
 851         struct inpcb *inp, *tmpinp;
 852         u_short fport = fport_arg, lport = lport_arg;
 853         int faith;
 854
 855         if (faithprefix_p != NULL)
 856                 faith = (*faithprefix_p)(laddr);
 857         else
 858                 faith = 0;
 859
 860         /*
 861          * First look for an exact match.
 862          */
 863         tmpinp = NULL;
 864         INP_GROUP_LOCK(pcbgroup);
 865         head = &pcbgroup->ipg_hashbase[
 866             INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
 867             pcbgroup->ipg_hashmask)];
 868         LIST_FOREACH(inp, head, inp_pcbgrouphash) {
 869                 /* XXX inp locking */
 870                 if ((inp->inp_vflag & INP_IPV6) == 0)
 871                         continue;
 872                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
 873                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 874                     inp->inp_fport == fport &&
 875                     inp->inp_lport == lport) {
 876                         /*
 877                          * XXX We should be able to directly return
 878                          * the inp here, without any checks.
 879                          * Well unless both bound with SO_REUSEPORT?
 880                          */
 881                         if (prison_flag(inp->inp_cred, PR_IP6))
 882                                 goto found;
 883                         if (tmpinp == NULL)
 884                                 tmpinp = inp;
 885                 }
 886         }
 887         if (tmpinp != NULL) {
 888                 inp = tmpinp;
 889                 goto found;
 890         }
 891
 892         /*
 893          * Then look for a wildcard match, if requested.
 894          */
 895         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
 896                 struct inpcb *local_wild = NULL, *local_exact = NULL;
 897                 struct inpcb *jail_wild = NULL;
 898                 int injail;
 899
 900                 /*
 901                  * Order of socket selection - we always prefer jails.
 902                  *      1. jailed, non-wild.
 903                  *      2. jailed, wild.
 904                  *      3. non-jailed, non-wild.
 905                  *      4. non-jailed, wild.
 906                  */
 907                 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
 908                     0, pcbinfo->ipi_wildmask)];
 909                 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
 910                         /* XXX inp locking */
 911                         if ((inp->inp_vflag & INP_IPV6) == 0)
 912                                 continue;
 913
 914                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 915                             inp->inp_lport != lport) {
 916                                 continue;
 917                         }
 918
 919                         /* XXX inp locking */
 920                         if (faith && (inp->inp_flags & INP_FAITH) == 0)
 921                                 continue;
 922
 923                         injail = prison_flag(inp->inp_cred, PR_IP6);
 924                         if (injail) {
 925                                 if (prison_check_ip6(inp->inp_cred,
 926                                     laddr) != 0)
 927                                         continue;
 928                         } else {
 929                                 if (local_exact != NULL)
 930                                         continue;
 931                         }
 932
 933                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
 934                                 if (injail)
 935                                         goto found;
 936                                 else
 937                                         local_exact = inp;
 938                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 939                                 if (injail)
 940                                         jail_wild = inp;
 941                                 else
 942                                         local_wild = inp;
 943                         }
 944                 } /* LIST_FOREACH */
 945
 946                 inp = jail_wild;
 947                 if (inp == NULL)
 948                         inp = jail_wild;
 949                 if (inp == NULL)
 950                         inp = local_exact;
 951                 if (inp == NULL)
 952                         inp = local_wild;
 953                 if (inp != NULL)
 954                         goto found;
 955         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
 956         INP_GROUP_UNLOCK(pcbgroup);
 957         return (NULL);
 958
 959 found:
 960         in_pcbref(inp);
 961         INP_GROUP_UNLOCK(pcbgroup);
 962         if (lookupflags & INPLOOKUP_WLOCKPCB) {
 963                 INP_WLOCK(inp);
 964                 if (in_pcbrele_wlocked(inp))
 965                         return (NULL);
 966         } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
 967                 INP_RLOCK(inp);
 968                 if (in_pcbrele_rlocked(inp))
 969                         return (NULL);
 970         } else
 971                 panic("%s: locking buf", __func__);
 972         return (inp);
 973 }
 974 #endif /* PCBGROUP */
 975
 976 /*
 977  * Lookup PCB in hash list.
 978  */
 979 struct inpcb *
 980 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
 981     u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
 982     int lookupflags, struct ifnet *ifp)
 983 {
 984         struct inpcbhead *head;
 985         struct inpcb *inp, *tmpinp;
 986         u_short fport = fport_arg, lport = lport_arg;
 987         int faith;
 988
 989         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 990             ("%s: invalid lookup flags %d", __func__, lookupflags));
 991
 992         INP_HASH_LOCK_ASSERT(pcbinfo);
 993
 994         if (faithprefix_p != NULL)
 995                 faith = (*faithprefix_p)(laddr);
 996         else
 997                 faith = 0;
 998
 999         /*
1000          * First look for an exact match.
1001          */
1002         tmpinp = NULL;
1003         head = &pcbinfo->ipi_hashbase[
1004             INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
1005             pcbinfo->ipi_hashmask)];
1006         LIST_FOREACH(inp, head, inp_hash) {
1007                 /* XXX inp locking */
1008                 if ((inp->inp_vflag & INP_IPV6) == 0)
1009                         continue;
1010                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1011                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1012                     inp->inp_fport == fport &&
1013                     inp->inp_lport == lport) {
1014                         /*
1015                          * XXX We should be able to directly return
1016                          * the inp here, without any checks.
1017                          * Well unless both bound with SO_REUSEPORT?
1018                          */
1019                         if (prison_flag(inp->inp_cred, PR_IP6))
1020                                 return (inp);
1021                         if (tmpinp == NULL)
1022                                 tmpinp = inp;
1023                 }
1024         }
1025         if (tmpinp != NULL)
1026                 return (tmpinp);
1027
1028         /*
1029          * Then look for a wildcard match, if requested.
1030          */
1031         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1032                 struct inpcb *local_wild = NULL, *local_exact = NULL;
1033                 struct inpcb *jail_wild = NULL;
1034                 int injail;
1035
1036                 /*
1037                  * Order of socket selection - we always prefer jails.
1038                  *      1. jailed, non-wild.
1039                  *      2. jailed, wild.
1040                  *      3. non-jailed, non-wild.
1041                  *      4. non-jailed, wild.
1042                  */
1043                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1044                     0, pcbinfo->ipi_hashmask)];
1045                 LIST_FOREACH(inp, head, inp_hash) {
1046                         /* XXX inp locking */
1047                         if ((inp->inp_vflag & INP_IPV6) == 0)
1048                                 continue;
1049
1050                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1051                             inp->inp_lport != lport) {
1052                                 continue;
1053                         }
1054
1055                         /* XXX inp locking */
1056                         if (faith && (inp->inp_flags & INP_FAITH) == 0)
1057                                 continue;
1058
1059                         injail = prison_flag(inp->inp_cred, PR_IP6);
1060                         if (injail) {
1061                                 if (prison_check_ip6(inp->inp_cred,
1062                                     laddr) != 0)
1063                                         continue;
1064                         } else {
1065                                 if (local_exact != NULL)
1066                                         continue;
1067                         }
1068
1069                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1070                                 if (injail)
1071                                         return (inp);
1072                                 else
1073                                         local_exact = inp;
1074                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1075                                 if (injail)
1076                                         jail_wild = inp;
1077                                 else
1078                                         local_wild = inp;
1079                         }
1080                 } /* LIST_FOREACH */
1081
1082                 if (jail_wild != NULL)
1083                         return (jail_wild);
1084                 if (local_exact != NULL)
1085                         return (local_exact);
1086                 if (local_wild != NULL)
1087                         return (local_wild);
1088         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1089
1090         /*
1091          * Not found.
1092          */
1093         return (NULL);
1094 }
1095
1096 /*
1097  * Lookup PCB in hash list, using pcbinfo tables.  This variation locks the
1098  * hash list lock, and will return the inpcb locked (i.e., requires
1099  * INPLOOKUP_LOCKPCB).
1100  */
1101 static struct inpcb *
1102 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1103     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1104     struct ifnet *ifp)
1105 {
1106         struct inpcb *inp;
1107
1108         INP_HASH_RLOCK(pcbinfo);
1109         inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1110             (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1111         if (inp != NULL) {
1112                 in_pcbref(inp);
1113                 INP_HASH_RUNLOCK(pcbinfo);
1114                 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1115                         INP_WLOCK(inp);
1116                         if (in_pcbrele_wlocked(inp))
1117                                 return (NULL);
1118                 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1119                         INP_RLOCK(inp);
1120                         if (in_pcbrele_rlocked(inp))
1121                                 return (NULL);
1122                 } else
1123                         panic("%s: locking bug", __func__);
1124         } else
1125                 INP_HASH_RUNLOCK(pcbinfo);
1126         return (inp);
1127 }
1128
1129 /*
1130  * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1131  * from which a pre-calculated hash value may be extracted.
1132  *
1133  * Possibly more of this logic should be in in6_pcbgroup.c.
1134  */
1135 struct inpcb *
1136 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1137     struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1138 {
1139 #if defined(PCBGROUP)
1140         struct inpcbgroup *pcbgroup;
1141 #endif
1142
1143         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1144             ("%s: invalid lookup flags %d", __func__, lookupflags));
1145         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1146             ("%s: LOCKPCB not set", __func__));
1147
1148 #if defined(PCBGROUP)
1149         if (in_pcbgroup_enabled(pcbinfo)) {
1150                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1151                     fport);
1152                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1153                     laddr, lport, lookupflags, ifp));
1154         }
1155 #endif
1156         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1157             lookupflags, ifp));
1158 }
1159
1160 struct inpcb *
1161 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1162     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1163     struct ifnet *ifp, struct mbuf *m)
1164 {
1165 #ifdef PCBGROUP
1166         struct inpcbgroup *pcbgroup;
1167 #endif
1168
1169         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1170             ("%s: invalid lookup flags %d", __func__, lookupflags));
1171         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1172             ("%s: LOCKPCB not set", __func__));
1173
1174 #ifdef PCBGROUP
1175         if (in_pcbgroup_enabled(pcbinfo)) {
1176                 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1177                     m->m_pkthdr.flowid);
1178                 if (pcbgroup != NULL)
1179                         return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1180                             fport, laddr, lport, lookupflags, ifp));
1181                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1182                     fport);
1183                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1184                     laddr, lport, lookupflags, ifp));
1185         }
1186 #endif
1187         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1188             lookupflags, ifp));
1189 }
1190
1191 void
1192 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1193 {
1194         struct ip6_hdr *ip;
1195
1196         ip = mtod(m, struct ip6_hdr *);
1197         bzero(sin6, sizeof(*sin6));
1198         sin6->sin6_len = sizeof(*sin6);
1199         sin6->sin6_family = AF_INET6;
1200         sin6->sin6_addr = ip->ip6_src;
1201
1202         (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1203
1204         return;
1205 }