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 #include "opt_rss.h"
  75
  76 #include <sys/param.h>
  77 #include <sys/systm.h>
  78 #include <sys/malloc.h>
  79 #include <sys/mbuf.h>
  80 #include <sys/domain.h>
  81 #include <sys/protosw.h>
  82 #include <sys/socket.h>
  83 #include <sys/socketvar.h>
  84 #include <sys/sockio.h>
  85 #include <sys/errno.h>
  86 #include <sys/time.h>
  87 #include <sys/priv.h>
  88 #include <sys/proc.h>
  89 #include <sys/jail.h>
  90
  91 #include <vm/uma.h>
  92
  93 #include <net/if.h>
  94 #include <net/if_var.h>
  95 #include <net/if_types.h>
  96 #include <net/route.h>
  97
  98 #include <netinet/in.h>
  99 #include <netinet/in_var.h>
 100 #include <netinet/in_systm.h>
 101 #include <netinet/tcp_var.h>
 102 #include <netinet/ip6.h>
 103 #include <netinet/ip_var.h>
 104
 105 #include <netinet6/ip6_var.h>
 106 #include <netinet6/nd6.h>
 107 #include <netinet/in_pcb.h>
 108 #include <netinet6/in6_pcb.h>
 109 #include <netinet6/scope6_var.h>
 110
 111 static struct inpcb *in6_pcblookup_hash_locked(struct inpcbinfo *,
 112     struct in6_addr *, u_int, struct in6_addr *, u_int, int, struct ifnet *);
 113
 114 int
 115 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
 116     struct ucred *cred)
 117 {
 118         struct socket *so = inp->inp_socket;
 119         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
 120         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 121         u_short lport = 0;
 122         int error, lookupflags = 0;
 123         int reuseport = (so->so_options & SO_REUSEPORT);
 124
 125         INP_WLOCK_ASSERT(inp);
 126         INP_HASH_WLOCK_ASSERT(pcbinfo);
 127
 128         if (TAILQ_EMPTY(&V_in6_ifaddrhead))     /* XXX broken! */
 129                 return (EADDRNOTAVAIL);
 130         if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 131                 return (EINVAL);
 132         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
 133                 lookupflags = INPLOOKUP_WILDCARD;
 134         if (nam == NULL) {
 135                 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
 136                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 137                         return (error);
 138         } else {
 139                 sin6 = (struct sockaddr_in6 *)nam;
 140                 if (nam->sa_len != sizeof(*sin6))
 141                         return (EINVAL);
 142                 /*
 143                  * family check.
 144                  */
 145                 if (nam->sa_family != AF_INET6)
 146                         return (EAFNOSUPPORT);
 147
 148                 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 149                         return(error);
 150
 151                 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
 152                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 153                         return (error);
 154
 155                 lport = sin6->sin6_port;
 156                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 157                         /*
 158                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 159                          * allow compepte duplication of binding if
 160                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 161                          * and a multicast address is bound on both
 162                          * new and duplicated sockets.
 163                          */
 164                         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
 165                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
 166                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 167                         struct ifaddr *ifa;
 168
 169                         sin6->sin6_port = 0;            /* yech... */
 170                         if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
 171                             NULL &&
 172                             (inp->inp_flags & INP_BINDANY) == 0) {
 173                                 return (EADDRNOTAVAIL);
 174                         }
 175
 176                         /*
 177                          * XXX: bind to an anycast address might accidentally
 178                          * cause sending a packet with anycast source address.
 179                          * We should allow to bind to a deprecated address, since
 180                          * the application dares to use it.
 181                          */
 182                         if (ifa != NULL &&
 183                             ((struct in6_ifaddr *)ifa)->ia6_flags &
 184                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
 185                                 ifa_free(ifa);
 186                                 return (EADDRNOTAVAIL);
 187                         }
 188                         if (ifa != NULL)
 189                                 ifa_free(ifa);
 190                 }
 191                 if (lport) {
 192                         struct inpcb *t;
 193                         struct tcptw *tw;
 194
 195                         /* GROSS */
 196                         if (ntohs(lport) <= V_ipport_reservedhigh &&
 197                             ntohs(lport) >= V_ipport_reservedlow &&
 198                             priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
 199                             0))
 200                                 return (EACCES);
 201                         if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
 202                             priv_check_cred(inp->inp_cred,
 203                             PRIV_NETINET_REUSEPORT, 0) != 0) {
 204                                 t = in6_pcblookup_local(pcbinfo,
 205                                     &sin6->sin6_addr, lport,
 206                                     INPLOOKUP_WILDCARD, cred);
 207                                 if (t &&
 208                                     ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
 209                                     ((t->inp_flags & INP_TIMEWAIT) == 0) &&
 210                                     (so->so_type != SOCK_STREAM ||
 211                                      IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
 212                                     (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 213                                      !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
 214                                      (t->inp_flags2 & INP_REUSEPORT) == 0) &&
 215                                     (inp->inp_cred->cr_uid !=
 216                                      t->inp_cred->cr_uid))
 217                                         return (EADDRINUSE);
 218
 219                                 /*
 220                                  * If the socket is a BINDMULTI socket, then
 221                                  * the credentials need to match and the
 222                                  * original socket also has to have been bound
 223                                  * with BINDMULTI.
 224                                  */
 225                                 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
 226                                         return (EADDRINUSE);
 227
 228 #ifdef INET
 229                                 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 230                                     IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 231                                         struct sockaddr_in sin;
 232
 233                                         in6_sin6_2_sin(&sin, sin6);
 234                                         t = in_pcblookup_local(pcbinfo,
 235                                             sin.sin_addr, lport,
 236                                             INPLOOKUP_WILDCARD, cred);
 237                                         if (t &&
 238                                             ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
 239                                             ((t->inp_flags &
 240                                               INP_TIMEWAIT) == 0) &&
 241                                             (so->so_type != SOCK_STREAM ||
 242                                              ntohl(t->inp_faddr.s_addr) ==
 243                                               INADDR_ANY) &&
 244                                             (inp->inp_cred->cr_uid !=
 245                                              t->inp_cred->cr_uid))
 246                                                 return (EADDRINUSE);
 247
 248                                         if (t && (! in_pcbbind_check_bindmulti(inp, t)))
 249                                                 return (EADDRINUSE);
 250                                 }
 251 #endif
 252                         }
 253                         t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
 254                             lport, lookupflags, cred);
 255                         if (t && (t->inp_flags & INP_TIMEWAIT)) {
 256                                 /*
 257                                  * XXXRW: If an incpb has had its timewait
 258                                  * state recycled, we treat the address as
 259                                  * being in use (for now).  This is better
 260                                  * than a panic, but not desirable.
 261                                  */
 262                                 tw = intotw(t);
 263                                 if (tw == NULL ||
 264                                     (reuseport & tw->tw_so_options) == 0)
 265                                         return (EADDRINUSE);
 266                         } else if (t && (reuseport & inp_so_options(t)) == 0) {
 267                                 return (EADDRINUSE);
 268                         }
 269 #ifdef INET
 270                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 271                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 272                                 struct sockaddr_in sin;
 273
 274                                 in6_sin6_2_sin(&sin, sin6);
 275                                 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
 276                                     lport, lookupflags, cred);
 277                                 if (t && t->inp_flags & INP_TIMEWAIT) {
 278                                         tw = intotw(t);
 279                                         if (tw == NULL)
 280                                                 return (EADDRINUSE);
 281                                         if ((reuseport & tw->tw_so_options) == 0
 282                                             && (ntohl(t->inp_laddr.s_addr) !=
 283                                              INADDR_ANY || ((inp->inp_vflag &
 284                                              INP_IPV6PROTO) ==
 285                                              (t->inp_vflag & INP_IPV6PROTO))))
 286                                                 return (EADDRINUSE);
 287                                 } else if (t &&
 288                                     (reuseport & inp_so_options(t)) == 0 &&
 289                                     (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
 290                                     (t->inp_vflag & INP_IPV6PROTO) != 0))
 291                                         return (EADDRINUSE);
 292                         }
 293 #endif
 294                 }
 295                 inp->in6p_laddr = sin6->sin6_addr;
 296         }
 297         if (lport == 0) {
 298                 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
 299                         /* Undo an address bind that may have occurred. */
 300                         inp->in6p_laddr = in6addr_any;
 301                         return (error);
 302                 }
 303         } else {
 304                 inp->inp_lport = lport;
 305                 if (in_pcbinshash(inp) != 0) {
 306                         inp->in6p_laddr = in6addr_any;
 307                         inp->inp_lport = 0;
 308                         return (EAGAIN);
 309                 }
 310         }
 311         return (0);
 312 }
 313
 314 /*
 315  *   Transform old in6_pcbconnect() into an inner subroutine for new
 316  *   in6_pcbconnect(): Do some validity-checking on the remote
 317  *   address (in mbuf 'nam') and then determine local host address
 318  *   (i.e., which interface) to use to access that remote host.
 319  *
 320  *   This preserves definition of in6_pcbconnect(), while supporting a
 321  *   slightly different version for T/TCP.  (This is more than
 322  *   a bit of a kludge, but cleaning up the internal interfaces would
 323  *   have forced minor changes in every protocol).
 324  */
 325 static int
 326 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
 327     struct in6_addr *plocal_addr6)
 328 {
 329         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 330         int error = 0;
 331         struct ifnet *ifp = NULL;
 332         int scope_ambiguous = 0;
 333         struct in6_addr in6a;
 334
 335         INP_WLOCK_ASSERT(inp);
 336         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);        /* XXXRW: why? */
 337
 338         if (nam->sa_len != sizeof (*sin6))
 339                 return (EINVAL);
 340         if (sin6->sin6_family != AF_INET6)
 341                 return (EAFNOSUPPORT);
 342         if (sin6->sin6_port == 0)
 343                 return (EADDRNOTAVAIL);
 344
 345         if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
 346                 scope_ambiguous = 1;
 347         if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 348                 return(error);
 349
 350         if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
 351                 /*
 352                  * If the destination address is UNSPECIFIED addr,
 353                  * use the loopback addr, e.g ::1.
 354                  */
 355                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 356                         sin6->sin6_addr = in6addr_loopback;
 357         }
 358         if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 359                 return (error);
 360
 361         error = in6_selectsrc(sin6, inp->in6p_outputopts,
 362             inp, NULL, inp->inp_cred, &ifp, &in6a);
 363         if (error)
 364                 return (error);
 365
 366         if (ifp && scope_ambiguous &&
 367             (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
 368                 return(error);
 369         }
 370
 371         /*
 372          * Do not update this earlier, in case we return with an error.
 373          *
 374          * XXX: this in6_selectsrc result might replace the bound local
 375          * address with the address specified by setsockopt(IPV6_PKTINFO).
 376          * Is it the intended behavior?
 377          */
 378         *plocal_addr6 = in6a;
 379
 380         /*
 381          * Don't do pcblookup call here; return interface in
 382          * plocal_addr6
 383          * and exit to caller, that will do the lookup.
 384          */
 385
 386         return (0);
 387 }
 388
 389 /*
 390  * Outer subroutine:
 391  * Connect from a socket to a specified address.
 392  * Both address and port must be specified in argument sin.
 393  * If don't have a local address for this socket yet,
 394  * then pick one.
 395  */
 396 int
 397 in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
 398     struct ucred *cred, struct mbuf *m)
 399 {
 400         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 401         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 402         struct in6_addr addr6;
 403         int error;
 404
 405         INP_WLOCK_ASSERT(inp);
 406         INP_HASH_WLOCK_ASSERT(pcbinfo);
 407
 408         /*
 409          * Call inner routine, to assign local interface address.
 410          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 411          */
 412         if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
 413                 return (error);
 414
 415         if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
 416                                sin6->sin6_port,
 417                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 418                               ? &addr6 : &inp->in6p_laddr,
 419                               inp->inp_lport, 0, NULL) != NULL) {
 420                 return (EADDRINUSE);
 421         }
 422         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 423                 if (inp->inp_lport == 0) {
 424                         error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
 425                         if (error)
 426                                 return (error);
 427                 }
 428                 inp->in6p_laddr = addr6;
 429         }
 430         inp->in6p_faddr = sin6->sin6_addr;
 431         inp->inp_fport = sin6->sin6_port;
 432         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 433         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 434         if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
 435                 inp->inp_flow |=
 436                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 437
 438         in_pcbrehash_mbuf(inp, m);
 439
 440         return (0);
 441 }
 442
 443 int
 444 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 445 {
 446
 447         return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
 448 }
 449
 450 void
 451 in6_pcbdisconnect(struct inpcb *inp)
 452 {
 453
 454         INP_WLOCK_ASSERT(inp);
 455         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
 456
 457         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 458         inp->inp_fport = 0;
 459         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 460         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 461         in_pcbrehash(inp);
 462 }
 463
 464 struct sockaddr *
 465 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
 466 {
 467         struct sockaddr_in6 *sin6;
 468
 469         sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
 470         bzero(sin6, sizeof *sin6);
 471         sin6->sin6_family = AF_INET6;
 472         sin6->sin6_len = sizeof(*sin6);
 473         sin6->sin6_port = port;
 474         sin6->sin6_addr = *addr_p;
 475         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
 476
 477         return (struct sockaddr *)sin6;
 478 }
 479
 480 struct sockaddr *
 481 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
 482 {
 483         struct sockaddr_in sin;
 484         struct sockaddr_in6 *sin6_p;
 485
 486         bzero(&sin, sizeof sin);
 487         sin.sin_family = AF_INET;
 488         sin.sin_len = sizeof(sin);
 489         sin.sin_port = port;
 490         sin.sin_addr = *addr_p;
 491
 492         sin6_p = malloc(sizeof *sin6_p, M_SONAME,
 493                 M_WAITOK);
 494         in6_sin_2_v4mapsin6(&sin, sin6_p);
 495
 496         return (struct sockaddr *)sin6_p;
 497 }
 498
 499 int
 500 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
 501 {
 502         register struct inpcb *inp;
 503         struct in6_addr addr;
 504         in_port_t port;
 505
 506         inp = sotoinpcb(so);
 507         KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
 508
 509         INP_RLOCK(inp);
 510         port = inp->inp_lport;
 511         addr = inp->in6p_laddr;
 512         INP_RUNLOCK(inp);
 513
 514         *nam = in6_sockaddr(port, &addr);
 515         return 0;
 516 }
 517
 518 int
 519 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
 520 {
 521         struct inpcb *inp;
 522         struct in6_addr addr;
 523         in_port_t port;
 524
 525         inp = sotoinpcb(so);
 526         KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
 527
 528         INP_RLOCK(inp);
 529         port = inp->inp_fport;
 530         addr = inp->in6p_faddr;
 531         INP_RUNLOCK(inp);
 532
 533         *nam = in6_sockaddr(port, &addr);
 534         return 0;
 535 }
 536
 537 int
 538 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
 539 {
 540         struct  inpcb *inp;
 541         int     error;
 542
 543         inp = sotoinpcb(so);
 544         KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
 545
 546 #ifdef INET
 547         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 548                 error = in_getsockaddr(so, nam);
 549                 if (error == 0)
 550                         in6_sin_2_v4mapsin6_in_sock(nam);
 551         } else
 552 #endif
 553         {
 554                 /* scope issues will be handled in in6_getsockaddr(). */
 555                 error = in6_getsockaddr(so, nam);
 556         }
 557
 558         return error;
 559 }
 560
 561 int
 562 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
 563 {
 564         struct  inpcb *inp;
 565         int     error;
 566
 567         inp = sotoinpcb(so);
 568         KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
 569
 570 #ifdef INET
 571         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 572                 error = in_getpeeraddr(so, nam);
 573                 if (error == 0)
 574                         in6_sin_2_v4mapsin6_in_sock(nam);
 575         } else
 576 #endif
 577         /* scope issues will be handled in in6_getpeeraddr(). */
 578         error = in6_getpeeraddr(so, nam);
 579
 580         return error;
 581 }
 582
 583 /*
 584  * Pass some notification to all connections of a protocol
 585  * associated with address dst.  The local address and/or port numbers
 586  * may be specified to limit the search.  The "usual action" will be
 587  * taken, depending on the ctlinput cmd.  The caller must filter any
 588  * cmds that are uninteresting (e.g., no error in the map).
 589  * Call the protocol specific routine (if any) to report
 590  * any errors for each matching socket.
 591  */
 592 void
 593 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
 594     u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
 595     int cmd, void *cmdarg,
 596     struct inpcb *(*notify)(struct inpcb *, int))
 597 {
 598         struct inpcb *inp, *inp_temp;
 599         struct sockaddr_in6 sa6_src, *sa6_dst;
 600         u_short fport = fport_arg, lport = lport_arg;
 601         u_int32_t flowinfo;
 602         int errno;
 603
 604         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
 605                 return;
 606
 607         sa6_dst = (struct sockaddr_in6 *)dst;
 608         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 609                 return;
 610
 611         /*
 612          * note that src can be NULL when we get notify by local fragmentation.
 613          */
 614         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
 615         flowinfo = sa6_src.sin6_flowinfo;
 616
 617         /*
 618          * Redirects go to all references to the destination,
 619          * and use in6_rtchange to invalidate the route cache.
 620          * Dead host indications: also use in6_rtchange to invalidate
 621          * the cache, and deliver the error to all the sockets.
 622          * Otherwise, if we have knowledge of the local port and address,
 623          * deliver only to that socket.
 624          */
 625         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
 626                 fport = 0;
 627                 lport = 0;
 628                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
 629
 630                 if (cmd != PRC_HOSTDEAD)
 631                         notify = in6_rtchange;
 632         }
 633         errno = inet6ctlerrmap[cmd];
 634         INP_INFO_WLOCK(pcbinfo);
 635         LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
 636                 INP_WLOCK(inp);
 637                 if ((inp->inp_vflag & INP_IPV6) == 0) {
 638                         INP_WUNLOCK(inp);
 639                         continue;
 640                 }
 641
 642                 /*
 643                  * If the error designates a new path MTU for a destination
 644                  * and the application (associated with this socket) wanted to
 645                  * know the value, notify.
 646                  * XXX: should we avoid to notify the value to TCP sockets?
 647                  */
 648                 if (cmd == PRC_MSGSIZE && cmdarg != NULL)
 649                         ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
 650                                         *(u_int32_t *)cmdarg);
 651
 652                 /*
 653                  * Detect if we should notify the error. If no source and
 654                  * destination ports are specifed, but non-zero flowinfo and
 655                  * local address match, notify the error. This is the case
 656                  * when the error is delivered with an encrypted buffer
 657                  * by ESP. Otherwise, just compare addresses and ports
 658                  * as usual.
 659                  */
 660                 if (lport == 0 && fport == 0 && flowinfo &&
 661                     inp->inp_socket != NULL &&
 662                     flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
 663                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 664                         goto do_notify;
 665                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 666                                              &sa6_dst->sin6_addr) ||
 667                          inp->inp_socket == 0 ||
 668                          (lport && inp->inp_lport != lport) ||
 669                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 670                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 671                                               &sa6_src.sin6_addr)) ||
 672                          (fport && inp->inp_fport != fport)) {
 673                         INP_WUNLOCK(inp);
 674                         continue;
 675                 }
 676
 677           do_notify:
 678                 if (notify) {
 679                         if ((*notify)(inp, errno))
 680                                 INP_WUNLOCK(inp);
 681                 } else
 682                         INP_WUNLOCK(inp);
 683         }
 684         INP_INFO_WUNLOCK(pcbinfo);
 685 }
 686
 687 /*
 688  * Lookup a PCB based on the local address and port.  Caller must hold the
 689  * hash lock.  No inpcb locks or references are acquired.
 690  */
 691 struct inpcb *
 692 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
 693     u_short lport, int lookupflags, struct ucred *cred)
 694 {
 695         register struct inpcb *inp;
 696         int matchwild = 3, wildcard;
 697
 698         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 699             ("%s: invalid lookup flags %d", __func__, lookupflags));
 700
 701         INP_HASH_WLOCK_ASSERT(pcbinfo);
 702
 703         if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
 704                 struct inpcbhead *head;
 705                 /*
 706                  * Look for an unconnected (wildcard foreign addr) PCB that
 707                  * matches the local address and port we're looking for.
 708                  */
 709                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
 710                     INP6_PCBHASHKEY(&in6addr_any), lport, 0,
 711                     pcbinfo->ipi_hashmask)];
 712                 LIST_FOREACH(inp, head, inp_hash) {
 713                         /* XXX inp locking */
 714                         if ((inp->inp_vflag & INP_IPV6) == 0)
 715                                 continue;
 716                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
 717                             IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 718                             inp->inp_lport == lport) {
 719                                 /* Found. */
 720                                 if (cred == NULL ||
 721                                     prison_equal_ip6(cred->cr_prison,
 722                                         inp->inp_cred->cr_prison))
 723                                         return (inp);
 724                         }
 725                 }
 726                 /*
 727                  * Not found.
 728                  */
 729                 return (NULL);
 730         } else {
 731                 struct inpcbporthead *porthash;
 732                 struct inpcbport *phd;
 733                 struct inpcb *match = NULL;
 734                 /*
 735                  * Best fit PCB lookup.
 736                  *
 737                  * First see if this local port is in use by looking on the
 738                  * port hash list.
 739                  */
 740                 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
 741                     pcbinfo->ipi_porthashmask)];
 742                 LIST_FOREACH(phd, porthash, phd_hash) {
 743                         if (phd->phd_port == lport)
 744                                 break;
 745                 }
 746                 if (phd != NULL) {
 747                         /*
 748                          * Port is in use by one or more PCBs. Look for best
 749                          * fit.
 750                          */
 751                         LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 752                                 wildcard = 0;
 753                                 if (cred != NULL &&
 754                                     !prison_equal_ip6(cred->cr_prison,
 755                                         inp->inp_cred->cr_prison))
 756                                         continue;
 757                                 /* XXX inp locking */
 758                                 if ((inp->inp_vflag & INP_IPV6) == 0)
 759                                         continue;
 760                                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 761                                         wildcard++;
 762                                 if (!IN6_IS_ADDR_UNSPECIFIED(
 763                                         &inp->in6p_laddr)) {
 764                                         if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 765                                                 wildcard++;
 766                                         else if (!IN6_ARE_ADDR_EQUAL(
 767                                             &inp->in6p_laddr, laddr))
 768                                                 continue;
 769                                 } else {
 770                                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 771                                                 wildcard++;
 772                                 }
 773                                 if (wildcard < matchwild) {
 774                                         match = inp;
 775                                         matchwild = wildcard;
 776                                         if (matchwild == 0)
 777                                                 break;
 778                                 }
 779                         }
 780                 }
 781                 return (match);
 782         }
 783 }
 784
 785 void
 786 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 787 {
 788         struct inpcb *in6p;
 789         struct ip6_moptions *im6o;
 790         int i, gap;
 791
 792         INP_INFO_WLOCK(pcbinfo);
 793         LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
 794                 INP_WLOCK(in6p);
 795                 im6o = in6p->in6p_moptions;
 796                 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
 797                         /*
 798                          * Unselect the outgoing ifp for multicast if it
 799                          * is being detached.
 800                          */
 801                         if (im6o->im6o_multicast_ifp == ifp)
 802                                 im6o->im6o_multicast_ifp = NULL;
 803                         /*
 804                          * Drop multicast group membership if we joined
 805                          * through the interface being detached.
 806                          */
 807                         gap = 0;
 808                         for (i = 0; i < im6o->im6o_num_memberships; i++) {
 809                                 if (im6o->im6o_membership[i]->in6m_ifp ==
 810                                     ifp) {
 811                                         in6_mc_leave(im6o->im6o_membership[i],
 812                                             NULL);
 813                                         gap++;
 814                                 } else if (gap != 0) {
 815                                         im6o->im6o_membership[i - gap] =
 816                                             im6o->im6o_membership[i];
 817                                 }
 818                         }
 819                         im6o->im6o_num_memberships -= gap;
 820                 }
 821                 INP_WUNLOCK(in6p);
 822         }
 823         INP_INFO_WUNLOCK(pcbinfo);
 824 }
 825
 826 /*
 827  * Check for alternatives when higher level complains
 828  * about service problems.  For now, invalidate cached
 829  * routing information.  If the route was created dynamically
 830  * (by a redirect), time to try a default gateway again.
 831  */
 832 void
 833 in6_losing(struct inpcb *in6p)
 834 {
 835
 836         /*
 837          * We don't store route pointers in the routing table anymore
 838          */
 839         return;
 840 }
 841
 842 /*
 843  * After a routing change, flush old routing
 844  * and allocate a (hopefully) better one.
 845  */
 846 struct inpcb *
 847 in6_rtchange(struct inpcb *inp, int errno)
 848 {
 849         /*
 850          * We don't store route pointers in the routing table anymore
 851          */
 852         return inp;
 853 }
 854
 855 #ifdef PCBGROUP
 856 /*
 857  * Lookup PCB in hash list, using pcbgroup tables.
 858  */
 859 static struct inpcb *
 860 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
 861     struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
 862     u_int lport_arg, int lookupflags, struct ifnet *ifp)
 863 {
 864         struct inpcbhead *head;
 865         struct inpcb *inp, *tmpinp;
 866         u_short fport = fport_arg, lport = lport_arg;
 867
 868         /*
 869          * First look for an exact match.
 870          */
 871         tmpinp = NULL;
 872         INP_GROUP_LOCK(pcbgroup);
 873         head = &pcbgroup->ipg_hashbase[INP_PCBHASH(
 874             INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)];
 875         LIST_FOREACH(inp, head, inp_pcbgrouphash) {
 876                 /* XXX inp locking */
 877                 if ((inp->inp_vflag & INP_IPV6) == 0)
 878                         continue;
 879                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
 880                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 881                     inp->inp_fport == fport &&
 882                     inp->inp_lport == lport) {
 883                         /*
 884                          * XXX We should be able to directly return
 885                          * the inp here, without any checks.
 886                          * Well unless both bound with SO_REUSEPORT?
 887                          */
 888                         if (prison_flag(inp->inp_cred, PR_IP6))
 889                                 goto found;
 890                         if (tmpinp == NULL)
 891                                 tmpinp = inp;
 892                 }
 893         }
 894         if (tmpinp != NULL) {
 895                 inp = tmpinp;
 896                 goto found;
 897         }
 898
 899         /*
 900          * Then look for a wildcard match in the pcbgroup.
 901          */
 902         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
 903                 struct inpcb *local_wild = NULL, *local_exact = NULL;
 904                 struct inpcb *jail_wild = NULL;
 905                 int injail;
 906
 907                 /*
 908                  * Order of socket selection - we always prefer jails.
 909                  *      1. jailed, non-wild.
 910                  *      2. jailed, wild.
 911                  *      3. non-jailed, non-wild.
 912                  *      4. non-jailed, wild.
 913                  */
 914                 head = &pcbgroup->ipg_hashbase[
 915                     INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)];
 916                 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
 917                         /* XXX inp locking */
 918                         if ((inp->inp_vflag & INP_IPV6) == 0)
 919                                 continue;
 920
 921                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 922                             inp->inp_lport != lport) {
 923                                 continue;
 924                         }
 925
 926                         injail = prison_flag(inp->inp_cred, PR_IP6);
 927                         if (injail) {
 928                                 if (prison_check_ip6(inp->inp_cred,
 929                                     laddr) != 0)
 930                                         continue;
 931                         } else {
 932                                 if (local_exact != NULL)
 933                                         continue;
 934                         }
 935
 936                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
 937                                 if (injail)
 938                                         goto found;
 939                                 else
 940                                         local_exact = inp;
 941                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 942                                 if (injail)
 943                                         jail_wild = inp;
 944                                 else
 945                                         local_wild = inp;
 946                         }
 947                 } /* LIST_FOREACH */
 948
 949                 inp = jail_wild;
 950                 if (inp == NULL)
 951                         inp = jail_wild;
 952                 if (inp == NULL)
 953                         inp = local_exact;
 954                 if (inp == NULL)
 955                         inp = local_wild;
 956                 if (inp != NULL)
 957                         goto found;
 958         }
 959
 960         /*
 961          * Then look for a wildcard match, if requested.
 962          */
 963         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
 964                 struct inpcb *local_wild = NULL, *local_exact = NULL;
 965                 struct inpcb *jail_wild = NULL;
 966                 int injail;
 967
 968                 /*
 969                  * Order of socket selection - we always prefer jails.
 970                  *      1. jailed, non-wild.
 971                  *      2. jailed, wild.
 972                  *      3. non-jailed, non-wild.
 973                  *      4. non-jailed, wild.
 974                  */
 975                 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(
 976                     INP6_PCBHASHKEY(&in6addr_any), lport, 0,
 977                     pcbinfo->ipi_wildmask)];
 978                 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
 979                         /* XXX inp locking */
 980                         if ((inp->inp_vflag & INP_IPV6) == 0)
 981                                 continue;
 982
 983                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 984                             inp->inp_lport != lport) {
 985                                 continue;
 986                         }
 987
 988                         injail = prison_flag(inp->inp_cred, PR_IP6);
 989                         if (injail) {
 990                                 if (prison_check_ip6(inp->inp_cred,
 991                                     laddr) != 0)
 992                                         continue;
 993                         } else {
 994                                 if (local_exact != NULL)
 995                                         continue;
 996                         }
 997
 998                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
 999                                 if (injail)
1000                                         goto found;
1001                                 else
1002                                         local_exact = inp;
1003                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1004                                 if (injail)
1005                                         jail_wild = inp;
1006                                 else
1007                                         local_wild = inp;
1008                         }
1009                 } /* LIST_FOREACH */
1010
1011                 inp = jail_wild;
1012                 if (inp == NULL)
1013                         inp = jail_wild;
1014                 if (inp == NULL)
1015                         inp = local_exact;
1016                 if (inp == NULL)
1017                         inp = local_wild;
1018                 if (inp != NULL)
1019                         goto found;
1020         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1021         INP_GROUP_UNLOCK(pcbgroup);
1022         return (NULL);
1023
1024 found:
1025         in_pcbref(inp);
1026         INP_GROUP_UNLOCK(pcbgroup);
1027         if (lookupflags & INPLOOKUP_WLOCKPCB) {
1028                 INP_WLOCK(inp);
1029                 if (in_pcbrele_wlocked(inp))
1030                         return (NULL);
1031         } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1032                 INP_RLOCK(inp);
1033                 if (in_pcbrele_rlocked(inp))
1034                         return (NULL);
1035         } else
1036                 panic("%s: locking buf", __func__);
1037         return (inp);
1038 }
1039 #endif /* PCBGROUP */
1040
1041 /*
1042  * Lookup PCB in hash list.
1043  */
1044 static struct inpcb *
1045 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1046     u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1047     int lookupflags, struct ifnet *ifp)
1048 {
1049         struct inpcbhead *head;
1050         struct inpcb *inp, *tmpinp;
1051         u_short fport = fport_arg, lport = lport_arg;
1052
1053         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1054             ("%s: invalid lookup flags %d", __func__, lookupflags));
1055
1056         INP_HASH_LOCK_ASSERT(pcbinfo);
1057
1058         /*
1059          * First look for an exact match.
1060          */
1061         tmpinp = NULL;
1062         head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
1063             INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)];
1064         LIST_FOREACH(inp, head, inp_hash) {
1065                 /* XXX inp locking */
1066                 if ((inp->inp_vflag & INP_IPV6) == 0)
1067                         continue;
1068                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1069                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1070                     inp->inp_fport == fport &&
1071                     inp->inp_lport == lport) {
1072                         /*
1073                          * XXX We should be able to directly return
1074                          * the inp here, without any checks.
1075                          * Well unless both bound with SO_REUSEPORT?
1076                          */
1077                         if (prison_flag(inp->inp_cred, PR_IP6))
1078                                 return (inp);
1079                         if (tmpinp == NULL)
1080                                 tmpinp = inp;
1081                 }
1082         }
1083         if (tmpinp != NULL)
1084                 return (tmpinp);
1085
1086         /*
1087          * Then look for a wildcard match, if requested.
1088          */
1089         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1090                 struct inpcb *local_wild = NULL, *local_exact = NULL;
1091                 struct inpcb *jail_wild = NULL;
1092                 int injail;
1093
1094                 /*
1095                  * Order of socket selection - we always prefer jails.
1096                  *      1. jailed, non-wild.
1097                  *      2. jailed, wild.
1098                  *      3. non-jailed, non-wild.
1099                  *      4. non-jailed, wild.
1100                  */
1101                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
1102                     INP6_PCBHASHKEY(&in6addr_any), lport, 0,
1103                     pcbinfo->ipi_hashmask)];
1104                 LIST_FOREACH(inp, head, inp_hash) {
1105                         /* XXX inp locking */
1106                         if ((inp->inp_vflag & INP_IPV6) == 0)
1107                                 continue;
1108
1109                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1110                             inp->inp_lport != lport) {
1111                                 continue;
1112                         }
1113
1114                         injail = prison_flag(inp->inp_cred, PR_IP6);
1115                         if (injail) {
1116                                 if (prison_check_ip6(inp->inp_cred,
1117                                     laddr) != 0)
1118                                         continue;
1119                         } else {
1120                                 if (local_exact != NULL)
1121                                         continue;
1122                         }
1123
1124                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1125                                 if (injail)
1126                                         return (inp);
1127                                 else
1128                                         local_exact = inp;
1129                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1130                                 if (injail)
1131                                         jail_wild = inp;
1132                                 else
1133                                         local_wild = inp;
1134                         }
1135                 } /* LIST_FOREACH */
1136
1137                 if (jail_wild != NULL)
1138                         return (jail_wild);
1139                 if (local_exact != NULL)
1140                         return (local_exact);
1141                 if (local_wild != NULL)
1142                         return (local_wild);
1143         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1144
1145         /*
1146          * Not found.
1147          */
1148         return (NULL);
1149 }
1150
1151 /*
1152  * Lookup PCB in hash list, using pcbinfo tables.  This variation locks the
1153  * hash list lock, and will return the inpcb locked (i.e., requires
1154  * INPLOOKUP_LOCKPCB).
1155  */
1156 static struct inpcb *
1157 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1158     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1159     struct ifnet *ifp)
1160 {
1161         struct inpcb *inp;
1162
1163         INP_HASH_RLOCK(pcbinfo);
1164         inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1165             (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1166         if (inp != NULL) {
1167                 in_pcbref(inp);
1168                 INP_HASH_RUNLOCK(pcbinfo);
1169                 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1170                         INP_WLOCK(inp);
1171                         if (in_pcbrele_wlocked(inp))
1172                                 return (NULL);
1173                 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1174                         INP_RLOCK(inp);
1175                         if (in_pcbrele_rlocked(inp))
1176                                 return (NULL);
1177                 } else
1178                         panic("%s: locking bug", __func__);
1179         } else
1180                 INP_HASH_RUNLOCK(pcbinfo);
1181         return (inp);
1182 }
1183
1184 /*
1185  * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1186  * from which a pre-calculated hash value may be extracted.
1187  *
1188  * Possibly more of this logic should be in in6_pcbgroup.c.
1189  */
1190 struct inpcb *
1191 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1192     struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1193 {
1194 #if defined(PCBGROUP) && !defined(RSS)
1195         struct inpcbgroup *pcbgroup;
1196 #endif
1197
1198         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1199             ("%s: invalid lookup flags %d", __func__, lookupflags));
1200         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1201             ("%s: LOCKPCB not set", __func__));
1202
1203         /*
1204          * When not using RSS, use connection groups in preference to the
1205          * reservation table when looking up 4-tuples.  When using RSS, just
1206          * use the reservation table, due to the cost of the Toeplitz hash
1207          * in software.
1208          *
1209          * XXXRW: This policy belongs in the pcbgroup code, as in principle
1210          * we could be doing RSS with a non-Toeplitz hash that is affordable
1211          * in software.
1212          */
1213 #if defined(PCBGROUP) && !defined(RSS)
1214         if (in_pcbgroup_enabled(pcbinfo)) {
1215                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1216                     fport);
1217                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1218                     laddr, lport, lookupflags, ifp));
1219         }
1220 #endif
1221         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1222             lookupflags, ifp));
1223 }
1224
1225 struct inpcb *
1226 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1227     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1228     struct ifnet *ifp, struct mbuf *m)
1229 {
1230 #ifdef PCBGROUP
1231         struct inpcbgroup *pcbgroup;
1232 #endif
1233
1234         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1235             ("%s: invalid lookup flags %d", __func__, lookupflags));
1236         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1237             ("%s: LOCKPCB not set", __func__));
1238
1239 #ifdef PCBGROUP
1240         /*
1241          * If we can use a hardware-generated hash to look up the connection
1242          * group, use that connection group to find the inpcb.  Otherwise
1243          * fall back on a software hash -- or the reservation table if we're
1244          * using RSS.
1245          *
1246          * XXXRW: As above, that policy belongs in the pcbgroup code.
1247          */
1248         if (in_pcbgroup_enabled(pcbinfo) &&
1249             M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) {
1250                 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1251                     m->m_pkthdr.flowid);
1252                 if (pcbgroup != NULL)
1253                         return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1254                             fport, laddr, lport, lookupflags, ifp));
1255 #ifndef RSS
1256                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1257                     fport);
1258                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1259                     laddr, lport, lookupflags, ifp));
1260 #endif
1261         }
1262 #endif
1263         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1264             lookupflags, ifp));
1265 }
1266
1267 void
1268 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1269 {
1270         struct ip6_hdr *ip;
1271
1272         ip = mtod(m, struct ip6_hdr *);
1273         bzero(sin6, sizeof(*sin6));
1274         sin6->sin6_len = sizeof(*sin6);
1275         sin6->sin6_family = AF_INET6;
1276         sin6->sin6_addr = ip->ip6_src;
1277
1278         (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1279
1280         return;
1281 }