sys/netinet6/in6_pcb.c

   1 /*-
   2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   3  * Copyright (c) 2010-2011 Juniper Networks, Inc.
   4  * All rights reserved.
   5  *
   6  * Portions of this software were developed by Robert N. M. Watson under
   7  * contract to Juniper Networks, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
  34  */
  35
  36 /*-
  37  * Copyright (c) 1982, 1986, 1991, 1993
  38  *      The Regents of the University of California.  All rights reserved.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)in_pcb.c    8.2 (Berkeley) 1/4/94
  65  */
  66
  67 #include <sys/cdefs.h>
  68 __FBSDID("$FreeBSD$");
  69
  70 #include "opt_inet.h"
  71 #include "opt_inet6.h"
  72 #include "opt_ipsec.h"
  73 #include "opt_pcbgroup.h"
  74
  75 #include <sys/param.h>
  76 #include <sys/systm.h>
  77 #include <sys/malloc.h>
  78 #include <sys/mbuf.h>
  79 #include <sys/domain.h>
  80 #include <sys/protosw.h>
  81 #include <sys/socket.h>
  82 #include <sys/socketvar.h>
  83 #include <sys/sockio.h>
  84 #include <sys/errno.h>
  85 #include <sys/time.h>
  86 #include <sys/priv.h>
  87 #include <sys/proc.h>
  88 #include <sys/jail.h>
  89
  90 #include <vm/uma.h>
  91
  92 #include <net/if.h>
  93 #include <net/if_types.h>
  94 #include <net/route.h>
  95
  96 #include <netinet/in.h>
  97 #include <netinet/in_var.h>
  98 #include <netinet/in_systm.h>
  99 #include <netinet/tcp_var.h>
 100 #include <netinet/ip6.h>
 101 #include <netinet/ip_var.h>
 102
 103 #include <netinet6/ip6_var.h>
 104 #include <netinet6/nd6.h>
 105 #include <netinet/in_pcb.h>
 106 #include <netinet6/in6_pcb.h>
 107 #include <netinet6/scope6_var.h>
 108
 109 struct  in6_addr zeroin6_addr;
 110
 111 int
 112 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
 113     struct ucred *cred)
 114 {
 115         struct socket *so = inp->inp_socket;
 116         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
 117         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 118         u_short lport = 0;
 119         int error, lookupflags = 0;
 120         int reuseport = (so->so_options & SO_REUSEPORT);
 121
 122         INP_WLOCK_ASSERT(inp);
 123         INP_HASH_WLOCK_ASSERT(pcbinfo);
 124
 125         if (TAILQ_EMPTY(&V_in6_ifaddrhead))     /* XXX broken! */
 126                 return (EADDRNOTAVAIL);
 127         if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 128                 return (EINVAL);
 129         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
 130                 lookupflags = INPLOOKUP_WILDCARD;
 131         if (nam == NULL) {
 132                 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
 133                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 134                         return (error);
 135         } else {
 136                 sin6 = (struct sockaddr_in6 *)nam;
 137                 if (nam->sa_len != sizeof(*sin6))
 138                         return (EINVAL);
 139                 /*
 140                  * family check.
 141                  */
 142                 if (nam->sa_family != AF_INET6)
 143                         return (EAFNOSUPPORT);
 144
 145                 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 146                         return(error);
 147
 148                 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
 149                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 150                         return (error);
 151
 152                 lport = sin6->sin6_port;
 153                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 154                         /*
 155                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 156                          * allow compepte duplication of binding if
 157                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 158                          * and a multicast address is bound on both
 159                          * new and duplicated sockets.
 160                          */
 161                         if (so->so_options & SO_REUSEADDR)
 162                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
 163                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 164                         struct ifaddr *ifa;
 165
 166                         sin6->sin6_port = 0;            /* yech... */
 167                         if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
 168                             NULL &&
 169                             (inp->inp_flags & INP_BINDANY) == 0) {
 170                                 return (EADDRNOTAVAIL);
 171                         }
 172
 173                         /*
 174                          * XXX: bind to an anycast address might accidentally
 175                          * cause sending a packet with anycast source address.
 176                          * We should allow to bind to a deprecated address, since
 177                          * the application dares to use it.
 178                          */
 179                         if (ifa != NULL &&
 180                             ((struct in6_ifaddr *)ifa)->ia6_flags &
 181                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
 182                                 ifa_free(ifa);
 183                                 return (EADDRNOTAVAIL);
 184                         }
 185                         if (ifa != NULL)
 186                                 ifa_free(ifa);
 187                 }
 188                 if (lport) {
 189                         struct inpcb *t;
 190
 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_socket->so_options & SO_REUSEPORT)
 210                                       == 0) && (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 && (reuseport & ((t->inp_flags & INP_TIMEWAIT) ?
 237                             intotw(t)->tw_so_options :
 238                             t->inp_socket->so_options)) == 0)
 239                                 return (EADDRINUSE);
 240 #ifdef INET
 241                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 242                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 243                                 struct sockaddr_in sin;
 244
 245                                 in6_sin6_2_sin(&sin, sin6);
 246                                 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
 247                                     lport, lookupflags, cred);
 248                                 if (t && t->inp_flags & INP_TIMEWAIT) {
 249                                         if ((reuseport &
 250                                             intotw(t)->tw_so_options) == 0 &&
 251                                             (ntohl(t->inp_laddr.s_addr) !=
 252                                              INADDR_ANY || ((inp->inp_vflag &
 253                                              INP_IPV6PROTO) ==
 254                                              (t->inp_vflag & INP_IPV6PROTO))))
 255                                                 return (EADDRINUSE);
 256                                 }
 257                                 else if (t &&
 258                                     (reuseport & t->inp_socket->so_options)
 259                                     == 0 && (ntohl(t->inp_laddr.s_addr) !=
 260                                     INADDR_ANY || INP_SOCKAF(so) ==
 261                                      INP_SOCKAF(t->inp_socket)))
 262                                         return (EADDRINUSE);
 263                         }
 264 #endif
 265                 }
 266                 inp->in6p_laddr = sin6->sin6_addr;
 267         }
 268         if (lport == 0) {
 269                 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
 270                         /* Undo an address bind that may have occurred. */
 271                         inp->in6p_laddr = in6addr_any;
 272                         return (error);
 273                 }
 274         } else {
 275                 inp->inp_lport = lport;
 276                 if (in_pcbinshash(inp) != 0) {
 277                         inp->in6p_laddr = in6addr_any;
 278                         inp->inp_lport = 0;
 279                         return (EAGAIN);
 280                 }
 281         }
 282         return (0);
 283 }
 284
 285 /*
 286  *   Transform old in6_pcbconnect() into an inner subroutine for new
 287  *   in6_pcbconnect(): Do some validity-checking on the remote
 288  *   address (in mbuf 'nam') and then determine local host address
 289  *   (i.e., which interface) to use to access that remote host.
 290  *
 291  *   This preserves definition of in6_pcbconnect(), while supporting a
 292  *   slightly different version for T/TCP.  (This is more than
 293  *   a bit of a kludge, but cleaning up the internal interfaces would
 294  *   have forced minor changes in every protocol).
 295  */
 296 int
 297 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
 298     struct in6_addr *plocal_addr6)
 299 {
 300         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 301         int error = 0;
 302         struct ifnet *ifp = NULL;
 303         int scope_ambiguous = 0;
 304         struct in6_addr in6a;
 305
 306         INP_WLOCK_ASSERT(inp);
 307         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);        /* XXXRW: why? */
 308
 309         if (nam->sa_len != sizeof (*sin6))
 310                 return (EINVAL);
 311         if (sin6->sin6_family != AF_INET6)
 312                 return (EAFNOSUPPORT);
 313         if (sin6->sin6_port == 0)
 314                 return (EADDRNOTAVAIL);
 315
 316         if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
 317                 scope_ambiguous = 1;
 318         if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 319                 return(error);
 320
 321         if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
 322                 /*
 323                  * If the destination address is UNSPECIFIED addr,
 324                  * use the loopback addr, e.g ::1.
 325                  */
 326                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 327                         sin6->sin6_addr = in6addr_loopback;
 328         }
 329         if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 330                 return (error);
 331
 332         error = in6_selectsrc(sin6, inp->in6p_outputopts,
 333             inp, NULL, inp->inp_cred, &ifp, &in6a);
 334         if (error)
 335                 return (error);
 336
 337         if (ifp && scope_ambiguous &&
 338             (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
 339                 return(error);
 340         }
 341
 342         /*
 343          * Do not update this earlier, in case we return with an error.
 344          *
 345          * XXX: this in6_selectsrc result might replace the bound local
 346          * address with the address specified by setsockopt(IPV6_PKTINFO).
 347          * Is it the intended behavior?
 348          */
 349         *plocal_addr6 = in6a;
 350
 351         /*
 352          * Don't do pcblookup call here; return interface in
 353          * plocal_addr6
 354          * and exit to caller, that will do the lookup.
 355          */
 356
 357         return (0);
 358 }
 359
 360 /*
 361  * Outer subroutine:
 362  * Connect from a socket to a specified address.
 363  * Both address and port must be specified in argument sin.
 364  * If don't have a local address for this socket yet,
 365  * then pick one.
 366  */
 367 int
 368 in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
 369     struct ucred *cred, struct mbuf *m)
 370 {
 371         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 372         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 373         struct in6_addr addr6;
 374         int error;
 375
 376         INP_WLOCK_ASSERT(inp);
 377         INP_HASH_WLOCK_ASSERT(pcbinfo);
 378
 379         /*
 380          * Call inner routine, to assign local interface address.
 381          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 382          */
 383         if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
 384                 return (error);
 385
 386         if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
 387                                sin6->sin6_port,
 388                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 389                               ? &addr6 : &inp->in6p_laddr,
 390                               inp->inp_lport, 0, NULL) != NULL) {
 391                 return (EADDRINUSE);
 392         }
 393         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 394                 if (inp->inp_lport == 0) {
 395                         error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
 396                         if (error)
 397                                 return (error);
 398                 }
 399                 inp->in6p_laddr = addr6;
 400         }
 401         inp->in6p_faddr = sin6->sin6_addr;
 402         inp->inp_fport = sin6->sin6_port;
 403         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 404         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 405         if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
 406                 inp->inp_flow |=
 407                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 408
 409         in_pcbrehash_mbuf(inp, m);
 410
 411         return (0);
 412 }
 413
 414 int
 415 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 416 {
 417
 418         return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
 419 }
 420
 421 void
 422 in6_pcbdisconnect(struct inpcb *inp)
 423 {
 424
 425         INP_WLOCK_ASSERT(inp);
 426         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
 427
 428         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 429         inp->inp_fport = 0;
 430         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 431         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 432         in_pcbrehash(inp);
 433 }
 434
 435 struct sockaddr *
 436 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
 437 {
 438         struct sockaddr_in6 *sin6;
 439
 440         sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
 441         bzero(sin6, sizeof *sin6);
 442         sin6->sin6_family = AF_INET6;
 443         sin6->sin6_len = sizeof(*sin6);
 444         sin6->sin6_port = port;
 445         sin6->sin6_addr = *addr_p;
 446         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
 447
 448         return (struct sockaddr *)sin6;
 449 }
 450
 451 struct sockaddr *
 452 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
 453 {
 454         struct sockaddr_in sin;
 455         struct sockaddr_in6 *sin6_p;
 456
 457         bzero(&sin, sizeof sin);
 458         sin.sin_family = AF_INET;
 459         sin.sin_len = sizeof(sin);
 460         sin.sin_port = port;
 461         sin.sin_addr = *addr_p;
 462
 463         sin6_p = malloc(sizeof *sin6_p, M_SONAME,
 464                 M_WAITOK);
 465         in6_sin_2_v4mapsin6(&sin, sin6_p);
 466
 467         return (struct sockaddr *)sin6_p;
 468 }
 469
 470 int
 471 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
 472 {
 473         register struct inpcb *inp;
 474         struct in6_addr addr;
 475         in_port_t port;
 476
 477         inp = sotoinpcb(so);
 478         KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
 479
 480         INP_RLOCK(inp);
 481         port = inp->inp_lport;
 482         addr = inp->in6p_laddr;
 483         INP_RUNLOCK(inp);
 484
 485         *nam = in6_sockaddr(port, &addr);
 486         return 0;
 487 }
 488
 489 int
 490 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
 491 {
 492         struct inpcb *inp;
 493         struct in6_addr addr;
 494         in_port_t port;
 495
 496         inp = sotoinpcb(so);
 497         KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
 498
 499         INP_RLOCK(inp);
 500         port = inp->inp_fport;
 501         addr = inp->in6p_faddr;
 502         INP_RUNLOCK(inp);
 503
 504         *nam = in6_sockaddr(port, &addr);
 505         return 0;
 506 }
 507
 508 int
 509 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
 510 {
 511         struct  inpcb *inp;
 512         int     error;
 513
 514         inp = sotoinpcb(so);
 515         KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
 516
 517 #ifdef INET
 518         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 519                 error = in_getsockaddr(so, nam);
 520                 if (error == 0)
 521                         in6_sin_2_v4mapsin6_in_sock(nam);
 522         } else
 523 #endif
 524         {
 525                 /* scope issues will be handled in in6_getsockaddr(). */
 526                 error = in6_getsockaddr(so, nam);
 527         }
 528
 529         return error;
 530 }
 531
 532 int
 533 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
 534 {
 535         struct  inpcb *inp;
 536         int     error;
 537
 538         inp = sotoinpcb(so);
 539         KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
 540
 541 #ifdef INET
 542         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 543                 error = in_getpeeraddr(so, nam);
 544                 if (error == 0)
 545                         in6_sin_2_v4mapsin6_in_sock(nam);
 546         } else
 547 #endif
 548         /* scope issues will be handled in in6_getpeeraddr(). */
 549         error = in6_getpeeraddr(so, nam);
 550
 551         return error;
 552 }
 553
 554 /*
 555  * Pass some notification to all connections of a protocol
 556  * associated with address dst.  The local address and/or port numbers
 557  * may be specified to limit the search.  The "usual action" will be
 558  * taken, depending on the ctlinput cmd.  The caller must filter any
 559  * cmds that are uninteresting (e.g., no error in the map).
 560  * Call the protocol specific routine (if any) to report
 561  * any errors for each matching socket.
 562  */
 563 void
 564 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
 565     u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
 566     int cmd, void *cmdarg,
 567     struct inpcb *(*notify)(struct inpcb *, int))
 568 {
 569         struct inpcb *inp, *inp_temp;
 570         struct sockaddr_in6 sa6_src, *sa6_dst;
 571         u_short fport = fport_arg, lport = lport_arg;
 572         u_int32_t flowinfo;
 573         int errno;
 574
 575         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
 576                 return;
 577
 578         sa6_dst = (struct sockaddr_in6 *)dst;
 579         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 580                 return;
 581
 582         /*
 583          * note that src can be NULL when we get notify by local fragmentation.
 584          */
 585         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
 586         flowinfo = sa6_src.sin6_flowinfo;
 587
 588         /*
 589          * Redirects go to all references to the destination,
 590          * and use in6_rtchange to invalidate the route cache.
 591          * Dead host indications: also use in6_rtchange to invalidate
 592          * the cache, and deliver the error to all the sockets.
 593          * Otherwise, if we have knowledge of the local port and address,
 594          * deliver only to that socket.
 595          */
 596         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
 597                 fport = 0;
 598                 lport = 0;
 599                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
 600
 601                 if (cmd != PRC_HOSTDEAD)
 602                         notify = in6_rtchange;
 603         }
 604         errno = inet6ctlerrmap[cmd];
 605         INP_INFO_WLOCK(pcbinfo);
 606         LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
 607                 INP_WLOCK(inp);
 608                 if ((inp->inp_vflag & INP_IPV6) == 0) {
 609                         INP_WUNLOCK(inp);
 610                         continue;
 611                 }
 612
 613                 /*
 614                  * If the error designates a new path MTU for a destination
 615                  * and the application (associated with this socket) wanted to
 616                  * know the value, notify. Note that we notify for all
 617                  * disconnected sockets if the corresponding application
 618                  * wanted. This is because some UDP applications keep sending
 619                  * sockets disconnected.
 620                  * XXX: should we avoid to notify the value to TCP sockets?
 621                  */
 622                 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
 623                     (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 624                      IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
 625                         ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
 626                                         (u_int32_t *)cmdarg);
 627                 }
 628
 629                 /*
 630                  * Detect if we should notify the error. If no source and
 631                  * destination ports are specifed, but non-zero flowinfo and
 632                  * local address match, notify the error. This is the case
 633                  * when the error is delivered with an encrypted buffer
 634                  * by ESP. Otherwise, just compare addresses and ports
 635                  * as usual.
 636                  */
 637                 if (lport == 0 && fport == 0 && flowinfo &&
 638                     inp->inp_socket != NULL &&
 639                     flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
 640                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 641                         goto do_notify;
 642                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 643                                              &sa6_dst->sin6_addr) ||
 644                          inp->inp_socket == 0 ||
 645                          (lport && inp->inp_lport != lport) ||
 646                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 647                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 648                                               &sa6_src.sin6_addr)) ||
 649                          (fport && inp->inp_fport != fport)) {
 650                         INP_WUNLOCK(inp);
 651                         continue;
 652                 }
 653
 654           do_notify:
 655                 if (notify) {
 656                         if ((*notify)(inp, errno))
 657                                 INP_WUNLOCK(inp);
 658                 } else
 659                         INP_WUNLOCK(inp);
 660         }
 661         INP_INFO_WUNLOCK(pcbinfo);
 662 }
 663
 664 /*
 665  * Lookup a PCB based on the local address and port.  Caller must hold the
 666  * hash lock.  No inpcb locks or references are acquired.
 667  */
 668 struct inpcb *
 669 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
 670     u_short lport, int lookupflags, struct ucred *cred)
 671 {
 672         register struct inpcb *inp;
 673         int matchwild = 3, wildcard;
 674
 675         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 676             ("%s: invalid lookup flags %d", __func__, lookupflags));
 677
 678         INP_HASH_WLOCK_ASSERT(pcbinfo);
 679
 680         if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
 681                 struct inpcbhead *head;
 682                 /*
 683                  * Look for an unconnected (wildcard foreign addr) PCB that
 684                  * matches the local address and port we're looking for.
 685                  */
 686                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
 687                     0, pcbinfo->ipi_hashmask)];
 688                 LIST_FOREACH(inp, head, inp_hash) {
 689                         /* XXX inp locking */
 690                         if ((inp->inp_vflag & INP_IPV6) == 0)
 691                                 continue;
 692                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
 693                             IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 694                             inp->inp_lport == lport) {
 695                                 /* Found. */
 696                                 if (cred == NULL ||
 697                                     prison_equal_ip6(cred->cr_prison,
 698                                         inp->inp_cred->cr_prison))
 699                                         return (inp);
 700                         }
 701                 }
 702                 /*
 703                  * Not found.
 704                  */
 705                 return (NULL);
 706         } else {
 707                 struct inpcbporthead *porthash;
 708                 struct inpcbport *phd;
 709                 struct inpcb *match = NULL;
 710                 /*
 711                  * Best fit PCB lookup.
 712                  *
 713                  * First see if this local port is in use by looking on the
 714                  * port hash list.
 715                  */
 716                 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
 717                     pcbinfo->ipi_porthashmask)];
 718                 LIST_FOREACH(phd, porthash, phd_hash) {
 719                         if (phd->phd_port == lport)
 720                                 break;
 721                 }
 722                 if (phd != NULL) {
 723                         /*
 724                          * Port is in use by one or more PCBs. Look for best
 725                          * fit.
 726                          */
 727                         LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 728                                 wildcard = 0;
 729                                 if (cred != NULL &&
 730                                     !prison_equal_ip6(cred->cr_prison,
 731                                         inp->inp_cred->cr_prison))
 732                                         continue;
 733                                 /* XXX inp locking */
 734                                 if ((inp->inp_vflag & INP_IPV6) == 0)
 735                                         continue;
 736                                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 737                                         wildcard++;
 738                                 if (!IN6_IS_ADDR_UNSPECIFIED(
 739                                         &inp->in6p_laddr)) {
 740                                         if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 741                                                 wildcard++;
 742                                         else if (!IN6_ARE_ADDR_EQUAL(
 743                                             &inp->in6p_laddr, laddr))
 744                                                 continue;
 745                                 } else {
 746                                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 747                                                 wildcard++;
 748                                 }
 749                                 if (wildcard < matchwild) {
 750                                         match = inp;
 751                                         matchwild = wildcard;
 752                                         if (matchwild == 0)
 753                                                 break;
 754                                 }
 755                         }
 756                 }
 757                 return (match);
 758         }
 759 }
 760
 761 void
 762 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 763 {
 764         struct inpcb *in6p;
 765         struct ip6_moptions *im6o;
 766         int i, gap;
 767
 768         INP_INFO_RLOCK(pcbinfo);
 769         LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
 770                 INP_WLOCK(in6p);
 771                 im6o = in6p->in6p_moptions;
 772                 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
 773                         /*
 774                          * Unselect the outgoing ifp for multicast if it
 775                          * is being detached.
 776                          */
 777                         if (im6o->im6o_multicast_ifp == ifp)
 778                                 im6o->im6o_multicast_ifp = NULL;
 779                         /*
 780                          * Drop multicast group membership if we joined
 781                          * through the interface being detached.
 782                          */
 783                         gap = 0;
 784                         for (i = 0; i < im6o->im6o_num_memberships; i++) {
 785                                 if (im6o->im6o_membership[i]->in6m_ifp ==
 786                                     ifp) {
 787                                         in6_mc_leave(im6o->im6o_membership[i],
 788                                             NULL);
 789                                         gap++;
 790                                 } else if (gap != 0) {
 791                                         im6o->im6o_membership[i - gap] =
 792                                             im6o->im6o_membership[i];
 793                                 }
 794                         }
 795                         im6o->im6o_num_memberships -= gap;
 796                 }
 797                 INP_WUNLOCK(in6p);
 798         }
 799         INP_INFO_RUNLOCK(pcbinfo);
 800 }
 801
 802 /*
 803  * Check for alternatives when higher level complains
 804  * about service problems.  For now, invalidate cached
 805  * routing information.  If the route was created dynamically
 806  * (by a redirect), time to try a default gateway again.
 807  */
 808 void
 809 in6_losing(struct inpcb *in6p)
 810 {
 811
 812         /*
 813          * We don't store route pointers in the routing table anymore
 814          */
 815         return;
 816 }
 817
 818 /*
 819  * After a routing change, flush old routing
 820  * and allocate a (hopefully) better one.
 821  */
 822 struct inpcb *
 823 in6_rtchange(struct inpcb *inp, int errno)
 824 {
 825         /*
 826          * We don't store route pointers in the routing table anymore
 827          */
 828         return inp;
 829 }
 830
 831 #ifdef PCBGROUP
 832 /*
 833  * Lookup PCB in hash list, using pcbgroup tables.
 834  */
 835 static struct inpcb *
 836 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
 837     struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
 838     u_int lport_arg, int lookupflags, struct ifnet *ifp)
 839 {
 840         struct inpcbhead *head;
 841         struct inpcb *inp, *tmpinp;
 842         u_short fport = fport_arg, lport = lport_arg;
 843         int faith;
 844
 845         if (faithprefix_p != NULL)
 846                 faith = (*faithprefix_p)(laddr);
 847         else
 848                 faith = 0;
 849
 850         /*
 851          * First look for an exact match.
 852          */
 853         tmpinp = NULL;
 854         INP_GROUP_LOCK(pcbgroup);
 855         head = &pcbgroup->ipg_hashbase[
 856             INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
 857             pcbgroup->ipg_hashmask)];
 858         LIST_FOREACH(inp, head, inp_pcbgrouphash) {
 859                 /* XXX inp locking */
 860                 if ((inp->inp_vflag & INP_IPV6) == 0)
 861                         continue;
 862                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
 863                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 864                     inp->inp_fport == fport &&
 865                     inp->inp_lport == lport) {
 866                         /*
 867                          * XXX We should be able to directly return
 868                          * the inp here, without any checks.
 869                          * Well unless both bound with SO_REUSEPORT?
 870                          */
 871                         if (prison_flag(inp->inp_cred, PR_IP6))
 872                                 goto found;
 873                         if (tmpinp == NULL)
 874                                 tmpinp = inp;
 875                 }
 876         }
 877         if (tmpinp != NULL) {
 878                 inp = tmpinp;
 879                 goto found;
 880         }
 881
 882         /*
 883          * Then look for a wildcard match, if requested.
 884          */
 885         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
 886                 struct inpcb *local_wild = NULL, *local_exact = NULL;
 887                 struct inpcb *jail_wild = NULL;
 888                 int injail;
 889
 890                 /*
 891                  * Order of socket selection - we always prefer jails.
 892                  *      1. jailed, non-wild.
 893                  *      2. jailed, wild.
 894                  *      3. non-jailed, non-wild.
 895                  *      4. non-jailed, wild.
 896                  */
 897                 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
 898                     0, pcbinfo->ipi_wildmask)];
 899                 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
 900                         /* XXX inp locking */
 901                         if ((inp->inp_vflag & INP_IPV6) == 0)
 902                                 continue;
 903
 904                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 905                             inp->inp_lport != lport) {
 906                                 continue;
 907                         }
 908
 909                         /* XXX inp locking */
 910                         if (faith && (inp->inp_flags & INP_FAITH) == 0)
 911                                 continue;
 912
 913                         injail = prison_flag(inp->inp_cred, PR_IP6);
 914                         if (injail) {
 915                                 if (prison_check_ip6(inp->inp_cred,
 916                                     laddr) != 0)
 917                                         continue;
 918                         } else {
 919                                 if (local_exact != NULL)
 920                                         continue;
 921                         }
 922
 923                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
 924                                 if (injail)
 925                                         goto found;
 926                                 else
 927                                         local_exact = inp;
 928                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 929                                 if (injail)
 930                                         jail_wild = inp;
 931                                 else
 932                                         local_wild = inp;
 933                         }
 934                 } /* LIST_FOREACH */
 935
 936                 inp = jail_wild;
 937                 if (inp == NULL)
 938                         inp = jail_wild;
 939                 if (inp == NULL)
 940                         inp = local_exact;
 941                 if (inp == NULL)
 942                         inp = local_wild;
 943                 if (inp != NULL)
 944                         goto found;
 945         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
 946         INP_GROUP_UNLOCK(pcbgroup);
 947         return (NULL);
 948
 949 found:
 950         in_pcbref(inp);
 951         INP_GROUP_UNLOCK(pcbgroup);
 952         if (lookupflags & INPLOOKUP_WLOCKPCB) {
 953                 INP_WLOCK(inp);
 954                 if (in_pcbrele_wlocked(inp))
 955                         return (NULL);
 956         } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
 957                 INP_RLOCK(inp);
 958                 if (in_pcbrele_rlocked(inp))
 959                         return (NULL);
 960         } else
 961                 panic("%s: locking buf", __func__);
 962         return (inp);
 963 }
 964 #endif /* PCBGROUP */
 965
 966 /*
 967  * Lookup PCB in hash list.
 968  */
 969 struct inpcb *
 970 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
 971     u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
 972     int lookupflags, struct ifnet *ifp)
 973 {
 974         struct inpcbhead *head;
 975         struct inpcb *inp, *tmpinp;
 976         u_short fport = fport_arg, lport = lport_arg;
 977         int faith;
 978
 979         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 980             ("%s: invalid lookup flags %d", __func__, lookupflags));
 981
 982         INP_HASH_LOCK_ASSERT(pcbinfo);
 983
 984         if (faithprefix_p != NULL)
 985                 faith = (*faithprefix_p)(laddr);
 986         else
 987                 faith = 0;
 988
 989         /*
 990          * First look for an exact match.
 991          */
 992         tmpinp = NULL;
 993         head = &pcbinfo->ipi_hashbase[
 994             INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
 995             pcbinfo->ipi_hashmask)];
 996         LIST_FOREACH(inp, head, inp_hash) {
 997                 /* XXX inp locking */
 998                 if ((inp->inp_vflag & INP_IPV6) == 0)
 999                         continue;
1000                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1001                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1002                     inp->inp_fport == fport &&
1003                     inp->inp_lport == lport) {
1004                         /*
1005                          * XXX We should be able to directly return
1006                          * the inp here, without any checks.
1007                          * Well unless both bound with SO_REUSEPORT?
1008                          */
1009                         if (prison_flag(inp->inp_cred, PR_IP6))
1010                                 return (inp);
1011                         if (tmpinp == NULL)
1012                                 tmpinp = inp;
1013                 }
1014         }
1015         if (tmpinp != NULL)
1016                 return (tmpinp);
1017
1018         /*
1019          * Then look for a wildcard match, if requested.
1020          */
1021         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1022                 struct inpcb *local_wild = NULL, *local_exact = NULL;
1023                 struct inpcb *jail_wild = NULL;
1024                 int injail;
1025
1026                 /*
1027                  * Order of socket selection - we always prefer jails.
1028                  *      1. jailed, non-wild.
1029                  *      2. jailed, wild.
1030                  *      3. non-jailed, non-wild.
1031                  *      4. non-jailed, wild.
1032                  */
1033                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1034                     0, pcbinfo->ipi_hashmask)];
1035                 LIST_FOREACH(inp, head, inp_hash) {
1036                         /* XXX inp locking */
1037                         if ((inp->inp_vflag & INP_IPV6) == 0)
1038                                 continue;
1039
1040                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1041                             inp->inp_lport != lport) {
1042                                 continue;
1043                         }
1044
1045                         /* XXX inp locking */
1046                         if (faith && (inp->inp_flags & INP_FAITH) == 0)
1047                                 continue;
1048
1049                         injail = prison_flag(inp->inp_cred, PR_IP6);
1050                         if (injail) {
1051                                 if (prison_check_ip6(inp->inp_cred,
1052                                     laddr) != 0)
1053                                         continue;
1054                         } else {
1055                                 if (local_exact != NULL)
1056                                         continue;
1057                         }
1058
1059                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1060                                 if (injail)
1061                                         return (inp);
1062                                 else
1063                                         local_exact = inp;
1064                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1065                                 if (injail)
1066                                         jail_wild = inp;
1067                                 else
1068                                         local_wild = inp;
1069                         }
1070                 } /* LIST_FOREACH */
1071
1072                 if (jail_wild != NULL)
1073                         return (jail_wild);
1074                 if (local_exact != NULL)
1075                         return (local_exact);
1076                 if (local_wild != NULL)
1077                         return (local_wild);
1078         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1079
1080         /*
1081          * Not found.
1082          */
1083         return (NULL);
1084 }
1085
1086 /*
1087  * Lookup PCB in hash list, using pcbinfo tables.  This variation locks the
1088  * hash list lock, and will return the inpcb locked (i.e., requires
1089  * INPLOOKUP_LOCKPCB).
1090  */
1091 static struct inpcb *
1092 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1093     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1094     struct ifnet *ifp)
1095 {
1096         struct inpcb *inp;
1097
1098         INP_HASH_RLOCK(pcbinfo);
1099         inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1100             (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1101         if (inp != NULL) {
1102                 in_pcbref(inp);
1103                 INP_HASH_RUNLOCK(pcbinfo);
1104                 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1105                         INP_WLOCK(inp);
1106                         if (in_pcbrele_wlocked(inp))
1107                                 return (NULL);
1108                 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1109                         INP_RLOCK(inp);
1110                         if (in_pcbrele_rlocked(inp))
1111                                 return (NULL);
1112                 } else
1113                         panic("%s: locking bug", __func__);
1114         } else
1115                 INP_HASH_RUNLOCK(pcbinfo);
1116         return (inp);
1117 }
1118
1119 /*
1120  * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1121  * from which a pre-calculated hash value may be extracted.
1122  *
1123  * Possibly more of this logic should be in in6_pcbgroup.c.
1124  */
1125 struct inpcb *
1126 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1127     struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1128 {
1129 #if defined(PCBGROUP)
1130         struct inpcbgroup *pcbgroup;
1131 #endif
1132
1133         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1134             ("%s: invalid lookup flags %d", __func__, lookupflags));
1135         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1136             ("%s: LOCKPCB not set", __func__));
1137
1138 #if defined(PCBGROUP)
1139         if (in_pcbgroup_enabled(pcbinfo)) {
1140                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1141                     fport);
1142                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1143                     laddr, lport, lookupflags, ifp));
1144         }
1145 #endif
1146         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1147             lookupflags, ifp));
1148 }
1149
1150 struct inpcb *
1151 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1152     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1153     struct ifnet *ifp, struct mbuf *m)
1154 {
1155 #ifdef PCBGROUP
1156         struct inpcbgroup *pcbgroup;
1157 #endif
1158
1159         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1160             ("%s: invalid lookup flags %d", __func__, lookupflags));
1161         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1162             ("%s: LOCKPCB not set", __func__));
1163
1164 #ifdef PCBGROUP
1165         if (in_pcbgroup_enabled(pcbinfo)) {
1166                 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1167                     m->m_pkthdr.flowid);
1168                 if (pcbgroup != NULL)
1169                         return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1170                             fport, laddr, lport, lookupflags, ifp));
1171                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1172                     fport);
1173                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1174                     laddr, lport, lookupflags, ifp));
1175         }
1176 #endif
1177         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1178             lookupflags, ifp));
1179 }
1180
1181 void
1182 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1183 {
1184         struct ip6_hdr *ip;
1185
1186         ip = mtod(m, struct ip6_hdr *);
1187         bzero(sin6, sizeof(*sin6));
1188         sin6->sin6_len = sizeof(*sin6);
1189         sin6->sin6_family = AF_INET6;
1190         sin6->sin6_addr = ip->ip6_src;
1191
1192         (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1193
1194         return;
1195 }