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         int scope_ambiguous = 0;
 332         struct in6_addr in6a;
 333
 334         INP_WLOCK_ASSERT(inp);
 335         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);        /* XXXRW: why? */
 336
 337         if (nam->sa_len != sizeof (*sin6))
 338                 return (EINVAL);
 339         if (sin6->sin6_family != AF_INET6)
 340                 return (EAFNOSUPPORT);
 341         if (sin6->sin6_port == 0)
 342                 return (EADDRNOTAVAIL);
 343
 344         if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
 345                 scope_ambiguous = 1;
 346         if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 347                 return(error);
 348
 349         if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
 350                 /*
 351                  * If the destination address is UNSPECIFIED addr,
 352                  * use the loopback addr, e.g ::1.
 353                  */
 354                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 355                         sin6->sin6_addr = in6addr_loopback;
 356         }
 357         if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 358                 return (error);
 359
 360         error = in6_selectsrc_socket(sin6, inp->in6p_outputopts,
 361             inp, inp->inp_cred, scope_ambiguous, &in6a, NULL);
 362         if (error)
 363                 return (error);
 364
 365         /*
 366          * Do not update this earlier, in case we return with an error.
 367          *
 368          * XXX: this in6_selectsrc_socket result might replace the bound local
 369          * address with the address specified by setsockopt(IPV6_PKTINFO).
 370          * Is it the intended behavior?
 371          */
 372         *plocal_addr6 = in6a;
 373
 374         /*
 375          * Don't do pcblookup call here; return interface in
 376          * plocal_addr6
 377          * and exit to caller, that will do the lookup.
 378          */
 379
 380         return (0);
 381 }
 382
 383 /*
 384  * Outer subroutine:
 385  * Connect from a socket to a specified address.
 386  * Both address and port must be specified in argument sin.
 387  * If don't have a local address for this socket yet,
 388  * then pick one.
 389  */
 390 int
 391 in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
 392     struct ucred *cred, struct mbuf *m)
 393 {
 394         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 395         register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 396         struct in6_addr addr6;
 397         int error;
 398
 399         INP_WLOCK_ASSERT(inp);
 400         INP_HASH_WLOCK_ASSERT(pcbinfo);
 401
 402         /*
 403          * Call inner routine, to assign local interface address.
 404          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 405          */
 406         if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
 407                 return (error);
 408
 409         if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
 410                                sin6->sin6_port,
 411                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 412                               ? &addr6 : &inp->in6p_laddr,
 413                               inp->inp_lport, 0, NULL) != NULL) {
 414                 return (EADDRINUSE);
 415         }
 416         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 417                 if (inp->inp_lport == 0) {
 418                         error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
 419                         if (error)
 420                                 return (error);
 421                 }
 422                 inp->in6p_laddr = addr6;
 423         }
 424         inp->in6p_faddr = sin6->sin6_addr;
 425         inp->inp_fport = sin6->sin6_port;
 426         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 427         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 428         if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
 429                 inp->inp_flow |=
 430                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 431
 432         in_pcbrehash_mbuf(inp, m);
 433
 434         return (0);
 435 }
 436
 437 int
 438 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 439 {
 440
 441         return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
 442 }
 443
 444 void
 445 in6_pcbdisconnect(struct inpcb *inp)
 446 {
 447
 448         INP_WLOCK_ASSERT(inp);
 449         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
 450
 451         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 452         inp->inp_fport = 0;
 453         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 454         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 455         in_pcbrehash(inp);
 456 }
 457
 458 struct sockaddr *
 459 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
 460 {
 461         struct sockaddr_in6 *sin6;
 462
 463         sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
 464         bzero(sin6, sizeof *sin6);
 465         sin6->sin6_family = AF_INET6;
 466         sin6->sin6_len = sizeof(*sin6);
 467         sin6->sin6_port = port;
 468         sin6->sin6_addr = *addr_p;
 469         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
 470
 471         return (struct sockaddr *)sin6;
 472 }
 473
 474 struct sockaddr *
 475 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
 476 {
 477         struct sockaddr_in sin;
 478         struct sockaddr_in6 *sin6_p;
 479
 480         bzero(&sin, sizeof sin);
 481         sin.sin_family = AF_INET;
 482         sin.sin_len = sizeof(sin);
 483         sin.sin_port = port;
 484         sin.sin_addr = *addr_p;
 485
 486         sin6_p = malloc(sizeof *sin6_p, M_SONAME,
 487                 M_WAITOK);
 488         in6_sin_2_v4mapsin6(&sin, sin6_p);
 489
 490         return (struct sockaddr *)sin6_p;
 491 }
 492
 493 int
 494 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
 495 {
 496         register struct inpcb *inp;
 497         struct in6_addr addr;
 498         in_port_t port;
 499
 500         inp = sotoinpcb(so);
 501         KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
 502
 503         INP_RLOCK(inp);
 504         port = inp->inp_lport;
 505         addr = inp->in6p_laddr;
 506         INP_RUNLOCK(inp);
 507
 508         *nam = in6_sockaddr(port, &addr);
 509         return 0;
 510 }
 511
 512 int
 513 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
 514 {
 515         struct inpcb *inp;
 516         struct in6_addr addr;
 517         in_port_t port;
 518
 519         inp = sotoinpcb(so);
 520         KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
 521
 522         INP_RLOCK(inp);
 523         port = inp->inp_fport;
 524         addr = inp->in6p_faddr;
 525         INP_RUNLOCK(inp);
 526
 527         *nam = in6_sockaddr(port, &addr);
 528         return 0;
 529 }
 530
 531 int
 532 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
 533 {
 534         struct  inpcb *inp;
 535         int     error;
 536
 537         inp = sotoinpcb(so);
 538         KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
 539
 540 #ifdef INET
 541         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 542                 error = in_getsockaddr(so, nam);
 543                 if (error == 0)
 544                         in6_sin_2_v4mapsin6_in_sock(nam);
 545         } else
 546 #endif
 547         {
 548                 /* scope issues will be handled in in6_getsockaddr(). */
 549                 error = in6_getsockaddr(so, nam);
 550         }
 551
 552         return error;
 553 }
 554
 555 int
 556 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
 557 {
 558         struct  inpcb *inp;
 559         int     error;
 560
 561         inp = sotoinpcb(so);
 562         KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
 563
 564 #ifdef INET
 565         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 566                 error = in_getpeeraddr(so, nam);
 567                 if (error == 0)
 568                         in6_sin_2_v4mapsin6_in_sock(nam);
 569         } else
 570 #endif
 571         /* scope issues will be handled in in6_getpeeraddr(). */
 572         error = in6_getpeeraddr(so, nam);
 573
 574         return error;
 575 }
 576
 577 /*
 578  * Pass some notification to all connections of a protocol
 579  * associated with address dst.  The local address and/or port numbers
 580  * may be specified to limit the search.  The "usual action" will be
 581  * taken, depending on the ctlinput cmd.  The caller must filter any
 582  * cmds that are uninteresting (e.g., no error in the map).
 583  * Call the protocol specific routine (if any) to report
 584  * any errors for each matching socket.
 585  */
 586 void
 587 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
 588     u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
 589     int cmd, void *cmdarg,
 590     struct inpcb *(*notify)(struct inpcb *, int))
 591 {
 592         struct inpcb *inp, *inp_temp;
 593         struct sockaddr_in6 sa6_src, *sa6_dst;
 594         u_short fport = fport_arg, lport = lport_arg;
 595         u_int32_t flowinfo;
 596         int errno;
 597
 598         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
 599                 return;
 600
 601         sa6_dst = (struct sockaddr_in6 *)dst;
 602         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 603                 return;
 604
 605         /*
 606          * note that src can be NULL when we get notify by local fragmentation.
 607          */
 608         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
 609         flowinfo = sa6_src.sin6_flowinfo;
 610
 611         /*
 612          * Redirects go to all references to the destination,
 613          * and use in6_rtchange to invalidate the route cache.
 614          * Dead host indications: also use in6_rtchange to invalidate
 615          * the cache, and deliver the error to all the sockets.
 616          * Otherwise, if we have knowledge of the local port and address,
 617          * deliver only to that socket.
 618          */
 619         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
 620                 fport = 0;
 621                 lport = 0;
 622                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
 623
 624                 if (cmd != PRC_HOSTDEAD)
 625                         notify = in6_rtchange;
 626         }
 627         errno = inet6ctlerrmap[cmd];
 628         INP_INFO_WLOCK(pcbinfo);
 629         LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
 630                 INP_WLOCK(inp);
 631                 if ((inp->inp_vflag & INP_IPV6) == 0) {
 632                         INP_WUNLOCK(inp);
 633                         continue;
 634                 }
 635
 636                 /*
 637                  * If the error designates a new path MTU for a destination
 638                  * and the application (associated with this socket) wanted to
 639                  * know the value, notify.
 640                  * XXX: should we avoid to notify the value to TCP sockets?
 641                  */
 642                 if (cmd == PRC_MSGSIZE && cmdarg != NULL)
 643                         ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
 644                                         *(u_int32_t *)cmdarg);
 645
 646                 /*
 647                  * Detect if we should notify the error. If no source and
 648                  * destination ports are specifed, but non-zero flowinfo and
 649                  * local address match, notify the error. This is the case
 650                  * when the error is delivered with an encrypted buffer
 651                  * by ESP. Otherwise, just compare addresses and ports
 652                  * as usual.
 653                  */
 654                 if (lport == 0 && fport == 0 && flowinfo &&
 655                     inp->inp_socket != NULL &&
 656                     flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
 657                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 658                         goto do_notify;
 659                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 660                                              &sa6_dst->sin6_addr) ||
 661                          inp->inp_socket == 0 ||
 662                          (lport && inp->inp_lport != lport) ||
 663                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 664                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 665                                               &sa6_src.sin6_addr)) ||
 666                          (fport && inp->inp_fport != fport)) {
 667                         INP_WUNLOCK(inp);
 668                         continue;
 669                 }
 670
 671           do_notify:
 672                 if (notify) {
 673                         if ((*notify)(inp, errno))
 674                                 INP_WUNLOCK(inp);
 675                 } else
 676                         INP_WUNLOCK(inp);
 677         }
 678         INP_INFO_WUNLOCK(pcbinfo);
 679 }
 680
 681 /*
 682  * Lookup a PCB based on the local address and port.  Caller must hold the
 683  * hash lock.  No inpcb locks or references are acquired.
 684  */
 685 struct inpcb *
 686 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
 687     u_short lport, int lookupflags, struct ucred *cred)
 688 {
 689         register struct inpcb *inp;
 690         int matchwild = 3, wildcard;
 691
 692         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 693             ("%s: invalid lookup flags %d", __func__, lookupflags));
 694
 695         INP_HASH_WLOCK_ASSERT(pcbinfo);
 696
 697         if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
 698                 struct inpcbhead *head;
 699                 /*
 700                  * Look for an unconnected (wildcard foreign addr) PCB that
 701                  * matches the local address and port we're looking for.
 702                  */
 703                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
 704                     INP6_PCBHASHKEY(&in6addr_any), lport, 0,
 705                     pcbinfo->ipi_hashmask)];
 706                 LIST_FOREACH(inp, head, inp_hash) {
 707                         /* XXX inp locking */
 708                         if ((inp->inp_vflag & INP_IPV6) == 0)
 709                                 continue;
 710                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
 711                             IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 712                             inp->inp_lport == lport) {
 713                                 /* Found. */
 714                                 if (cred == NULL ||
 715                                     prison_equal_ip6(cred->cr_prison,
 716                                         inp->inp_cred->cr_prison))
 717                                         return (inp);
 718                         }
 719                 }
 720                 /*
 721                  * Not found.
 722                  */
 723                 return (NULL);
 724         } else {
 725                 struct inpcbporthead *porthash;
 726                 struct inpcbport *phd;
 727                 struct inpcb *match = NULL;
 728                 /*
 729                  * Best fit PCB lookup.
 730                  *
 731                  * First see if this local port is in use by looking on the
 732                  * port hash list.
 733                  */
 734                 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
 735                     pcbinfo->ipi_porthashmask)];
 736                 LIST_FOREACH(phd, porthash, phd_hash) {
 737                         if (phd->phd_port == lport)
 738                                 break;
 739                 }
 740                 if (phd != NULL) {
 741                         /*
 742                          * Port is in use by one or more PCBs. Look for best
 743                          * fit.
 744                          */
 745                         LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 746                                 wildcard = 0;
 747                                 if (cred != NULL &&
 748                                     !prison_equal_ip6(cred->cr_prison,
 749                                         inp->inp_cred->cr_prison))
 750                                         continue;
 751                                 /* XXX inp locking */
 752                                 if ((inp->inp_vflag & INP_IPV6) == 0)
 753                                         continue;
 754                                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 755                                         wildcard++;
 756                                 if (!IN6_IS_ADDR_UNSPECIFIED(
 757                                         &inp->in6p_laddr)) {
 758                                         if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 759                                                 wildcard++;
 760                                         else if (!IN6_ARE_ADDR_EQUAL(
 761                                             &inp->in6p_laddr, laddr))
 762                                                 continue;
 763                                 } else {
 764                                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 765                                                 wildcard++;
 766                                 }
 767                                 if (wildcard < matchwild) {
 768                                         match = inp;
 769                                         matchwild = wildcard;
 770                                         if (matchwild == 0)
 771                                                 break;
 772                                 }
 773                         }
 774                 }
 775                 return (match);
 776         }
 777 }
 778
 779 void
 780 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 781 {
 782         struct inpcb *in6p;
 783         struct ip6_moptions *im6o;
 784         int i, gap;
 785
 786         INP_INFO_WLOCK(pcbinfo);
 787         LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
 788                 INP_WLOCK(in6p);
 789                 im6o = in6p->in6p_moptions;
 790                 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
 791                         /*
 792                          * Unselect the outgoing ifp for multicast if it
 793                          * is being detached.
 794                          */
 795                         if (im6o->im6o_multicast_ifp == ifp)
 796                                 im6o->im6o_multicast_ifp = NULL;
 797                         /*
 798                          * Drop multicast group membership if we joined
 799                          * through the interface being detached.
 800                          */
 801                         gap = 0;
 802                         for (i = 0; i < im6o->im6o_num_memberships; i++) {
 803                                 if (im6o->im6o_membership[i]->in6m_ifp ==
 804                                     ifp) {
 805                                         in6_mc_leave(im6o->im6o_membership[i],
 806                                             NULL);
 807                                         gap++;
 808                                 } else if (gap != 0) {
 809                                         im6o->im6o_membership[i - gap] =
 810                                             im6o->im6o_membership[i];
 811                                 }
 812                         }
 813                         im6o->im6o_num_memberships -= gap;
 814                 }
 815                 INP_WUNLOCK(in6p);
 816         }
 817         INP_INFO_WUNLOCK(pcbinfo);
 818 }
 819
 820 /*
 821  * Check for alternatives when higher level complains
 822  * about service problems.  For now, invalidate cached
 823  * routing information.  If the route was created dynamically
 824  * (by a redirect), time to try a default gateway again.
 825  */
 826 void
 827 in6_losing(struct inpcb *in6p)
 828 {
 829
 830         /*
 831          * We don't store route pointers in the routing table anymore
 832          */
 833         return;
 834 }
 835
 836 /*
 837  * After a routing change, flush old routing
 838  * and allocate a (hopefully) better one.
 839  */
 840 struct inpcb *
 841 in6_rtchange(struct inpcb *inp, int errno)
 842 {
 843         /*
 844          * We don't store route pointers in the routing table anymore
 845          */
 846         return inp;
 847 }
 848
 849 #ifdef PCBGROUP
 850 /*
 851  * Lookup PCB in hash list, using pcbgroup tables.
 852  */
 853 static struct inpcb *
 854 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
 855     struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
 856     u_int lport_arg, int lookupflags, struct ifnet *ifp)
 857 {
 858         struct inpcbhead *head;
 859         struct inpcb *inp, *tmpinp;
 860         u_short fport = fport_arg, lport = lport_arg;
 861
 862         /*
 863          * First look for an exact match.
 864          */
 865         tmpinp = NULL;
 866         INP_GROUP_LOCK(pcbgroup);
 867         head = &pcbgroup->ipg_hashbase[INP_PCBHASH(
 868             INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)];
 869         LIST_FOREACH(inp, head, inp_pcbgrouphash) {
 870                 /* XXX inp locking */
 871                 if ((inp->inp_vflag & INP_IPV6) == 0)
 872                         continue;
 873                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
 874                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 875                     inp->inp_fport == fport &&
 876                     inp->inp_lport == lport) {
 877                         /*
 878                          * XXX We should be able to directly return
 879                          * the inp here, without any checks.
 880                          * Well unless both bound with SO_REUSEPORT?
 881                          */
 882                         if (prison_flag(inp->inp_cred, PR_IP6))
 883                                 goto found;
 884                         if (tmpinp == NULL)
 885                                 tmpinp = inp;
 886                 }
 887         }
 888         if (tmpinp != NULL) {
 889                 inp = tmpinp;
 890                 goto found;
 891         }
 892
 893         /*
 894          * Then look for a wildcard match in the pcbgroup.
 895          */
 896         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
 897                 struct inpcb *local_wild = NULL, *local_exact = NULL;
 898                 struct inpcb *jail_wild = NULL;
 899                 int injail;
 900
 901                 /*
 902                  * Order of socket selection - we always prefer jails.
 903                  *      1. jailed, non-wild.
 904                  *      2. jailed, wild.
 905                  *      3. non-jailed, non-wild.
 906                  *      4. non-jailed, wild.
 907                  */
 908                 head = &pcbgroup->ipg_hashbase[
 909                     INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)];
 910                 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
 911                         /* XXX inp locking */
 912                         if ((inp->inp_vflag & INP_IPV6) == 0)
 913                                 continue;
 914
 915                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 916                             inp->inp_lport != lport) {
 917                                 continue;
 918                         }
 919
 920                         injail = prison_flag(inp->inp_cred, PR_IP6);
 921                         if (injail) {
 922                                 if (prison_check_ip6(inp->inp_cred,
 923                                     laddr) != 0)
 924                                         continue;
 925                         } else {
 926                                 if (local_exact != NULL)
 927                                         continue;
 928                         }
 929
 930                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
 931                                 if (injail)
 932                                         goto found;
 933                                 else
 934                                         local_exact = inp;
 935                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 936                                 if (injail)
 937                                         jail_wild = inp;
 938                                 else
 939                                         local_wild = inp;
 940                         }
 941                 } /* LIST_FOREACH */
 942
 943                 inp = jail_wild;
 944                 if (inp == NULL)
 945                         inp = jail_wild;
 946                 if (inp == NULL)
 947                         inp = local_exact;
 948                 if (inp == NULL)
 949                         inp = local_wild;
 950                 if (inp != NULL)
 951                         goto found;
 952         }
 953
 954         /*
 955          * Then look for a wildcard match, if requested.
 956          */
 957         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
 958                 struct inpcb *local_wild = NULL, *local_exact = NULL;
 959                 struct inpcb *jail_wild = NULL;
 960                 int injail;
 961
 962                 /*
 963                  * Order of socket selection - we always prefer jails.
 964                  *      1. jailed, non-wild.
 965                  *      2. jailed, wild.
 966                  *      3. non-jailed, non-wild.
 967                  *      4. non-jailed, wild.
 968                  */
 969                 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(
 970                     INP6_PCBHASHKEY(&in6addr_any), lport, 0,
 971                     pcbinfo->ipi_wildmask)];
 972                 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
 973                         /* XXX inp locking */
 974                         if ((inp->inp_vflag & INP_IPV6) == 0)
 975                                 continue;
 976
 977                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
 978                             inp->inp_lport != lport) {
 979                                 continue;
 980                         }
 981
 982                         injail = prison_flag(inp->inp_cred, PR_IP6);
 983                         if (injail) {
 984                                 if (prison_check_ip6(inp->inp_cred,
 985                                     laddr) != 0)
 986                                         continue;
 987                         } else {
 988                                 if (local_exact != NULL)
 989                                         continue;
 990                         }
 991
 992                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
 993                                 if (injail)
 994                                         goto found;
 995                                 else
 996                                         local_exact = inp;
 997                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 998                                 if (injail)
 999                                         jail_wild = inp;
1000                                 else
1001                                         local_wild = inp;
1002                         }
1003                 } /* LIST_FOREACH */
1004
1005                 inp = jail_wild;
1006                 if (inp == NULL)
1007                         inp = jail_wild;
1008                 if (inp == NULL)
1009                         inp = local_exact;
1010                 if (inp == NULL)
1011                         inp = local_wild;
1012                 if (inp != NULL)
1013                         goto found;
1014         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1015         INP_GROUP_UNLOCK(pcbgroup);
1016         return (NULL);
1017
1018 found:
1019         in_pcbref(inp);
1020         INP_GROUP_UNLOCK(pcbgroup);
1021         if (lookupflags & INPLOOKUP_WLOCKPCB) {
1022                 INP_WLOCK(inp);
1023                 if (in_pcbrele_wlocked(inp))
1024                         return (NULL);
1025         } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1026                 INP_RLOCK(inp);
1027                 if (in_pcbrele_rlocked(inp))
1028                         return (NULL);
1029         } else
1030                 panic("%s: locking buf", __func__);
1031         return (inp);
1032 }
1033 #endif /* PCBGROUP */
1034
1035 /*
1036  * Lookup PCB in hash list.
1037  */
1038 static struct inpcb *
1039 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1040     u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1041     int lookupflags, struct ifnet *ifp)
1042 {
1043         struct inpcbhead *head;
1044         struct inpcb *inp, *tmpinp;
1045         u_short fport = fport_arg, lport = lport_arg;
1046
1047         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1048             ("%s: invalid lookup flags %d", __func__, lookupflags));
1049
1050         INP_HASH_LOCK_ASSERT(pcbinfo);
1051
1052         /*
1053          * First look for an exact match.
1054          */
1055         tmpinp = NULL;
1056         head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
1057             INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)];
1058         LIST_FOREACH(inp, head, inp_hash) {
1059                 /* XXX inp locking */
1060                 if ((inp->inp_vflag & INP_IPV6) == 0)
1061                         continue;
1062                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1063                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1064                     inp->inp_fport == fport &&
1065                     inp->inp_lport == lport) {
1066                         /*
1067                          * XXX We should be able to directly return
1068                          * the inp here, without any checks.
1069                          * Well unless both bound with SO_REUSEPORT?
1070                          */
1071                         if (prison_flag(inp->inp_cred, PR_IP6))
1072                                 return (inp);
1073                         if (tmpinp == NULL)
1074                                 tmpinp = inp;
1075                 }
1076         }
1077         if (tmpinp != NULL)
1078                 return (tmpinp);
1079
1080         /*
1081          * Then look for a wildcard match, if requested.
1082          */
1083         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1084                 struct inpcb *local_wild = NULL, *local_exact = NULL;
1085                 struct inpcb *jail_wild = NULL;
1086                 int injail;
1087
1088                 /*
1089                  * Order of socket selection - we always prefer jails.
1090                  *      1. jailed, non-wild.
1091                  *      2. jailed, wild.
1092                  *      3. non-jailed, non-wild.
1093                  *      4. non-jailed, wild.
1094                  */
1095                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
1096                     INP6_PCBHASHKEY(&in6addr_any), lport, 0,
1097                     pcbinfo->ipi_hashmask)];
1098                 LIST_FOREACH(inp, head, inp_hash) {
1099                         /* XXX inp locking */
1100                         if ((inp->inp_vflag & INP_IPV6) == 0)
1101                                 continue;
1102
1103                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1104                             inp->inp_lport != lport) {
1105                                 continue;
1106                         }
1107
1108                         injail = prison_flag(inp->inp_cred, PR_IP6);
1109                         if (injail) {
1110                                 if (prison_check_ip6(inp->inp_cred,
1111                                     laddr) != 0)
1112                                         continue;
1113                         } else {
1114                                 if (local_exact != NULL)
1115                                         continue;
1116                         }
1117
1118                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1119                                 if (injail)
1120                                         return (inp);
1121                                 else
1122                                         local_exact = inp;
1123                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1124                                 if (injail)
1125                                         jail_wild = inp;
1126                                 else
1127                                         local_wild = inp;
1128                         }
1129                 } /* LIST_FOREACH */
1130
1131                 if (jail_wild != NULL)
1132                         return (jail_wild);
1133                 if (local_exact != NULL)
1134                         return (local_exact);
1135                 if (local_wild != NULL)
1136                         return (local_wild);
1137         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1138
1139         /*
1140          * Not found.
1141          */
1142         return (NULL);
1143 }
1144
1145 /*
1146  * Lookup PCB in hash list, using pcbinfo tables.  This variation locks the
1147  * hash list lock, and will return the inpcb locked (i.e., requires
1148  * INPLOOKUP_LOCKPCB).
1149  */
1150 static struct inpcb *
1151 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1152     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1153     struct ifnet *ifp)
1154 {
1155         struct inpcb *inp;
1156
1157         INP_HASH_RLOCK(pcbinfo);
1158         inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1159             (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1160         if (inp != NULL) {
1161                 in_pcbref(inp);
1162                 INP_HASH_RUNLOCK(pcbinfo);
1163                 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1164                         INP_WLOCK(inp);
1165                         if (in_pcbrele_wlocked(inp))
1166                                 return (NULL);
1167                 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1168                         INP_RLOCK(inp);
1169                         if (in_pcbrele_rlocked(inp))
1170                                 return (NULL);
1171                 } else
1172                         panic("%s: locking bug", __func__);
1173         } else
1174                 INP_HASH_RUNLOCK(pcbinfo);
1175         return (inp);
1176 }
1177
1178 /*
1179  * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1180  * from which a pre-calculated hash value may be extracted.
1181  *
1182  * Possibly more of this logic should be in in6_pcbgroup.c.
1183  */
1184 struct inpcb *
1185 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1186     struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1187 {
1188 #if defined(PCBGROUP) && !defined(RSS)
1189         struct inpcbgroup *pcbgroup;
1190 #endif
1191
1192         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1193             ("%s: invalid lookup flags %d", __func__, lookupflags));
1194         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1195             ("%s: LOCKPCB not set", __func__));
1196
1197         /*
1198          * When not using RSS, use connection groups in preference to the
1199          * reservation table when looking up 4-tuples.  When using RSS, just
1200          * use the reservation table, due to the cost of the Toeplitz hash
1201          * in software.
1202          *
1203          * XXXRW: This policy belongs in the pcbgroup code, as in principle
1204          * we could be doing RSS with a non-Toeplitz hash that is affordable
1205          * in software.
1206          */
1207 #if defined(PCBGROUP) && !defined(RSS)
1208         if (in_pcbgroup_enabled(pcbinfo)) {
1209                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1210                     fport);
1211                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1212                     laddr, lport, lookupflags, ifp));
1213         }
1214 #endif
1215         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1216             lookupflags, ifp));
1217 }
1218
1219 struct inpcb *
1220 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1221     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1222     struct ifnet *ifp, struct mbuf *m)
1223 {
1224 #ifdef PCBGROUP
1225         struct inpcbgroup *pcbgroup;
1226 #endif
1227
1228         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1229             ("%s: invalid lookup flags %d", __func__, lookupflags));
1230         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1231             ("%s: LOCKPCB not set", __func__));
1232
1233 #ifdef PCBGROUP
1234         /*
1235          * If we can use a hardware-generated hash to look up the connection
1236          * group, use that connection group to find the inpcb.  Otherwise
1237          * fall back on a software hash -- or the reservation table if we're
1238          * using RSS.
1239          *
1240          * XXXRW: As above, that policy belongs in the pcbgroup code.
1241          */
1242         if (in_pcbgroup_enabled(pcbinfo) &&
1243             M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) {
1244                 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1245                     m->m_pkthdr.flowid);
1246                 if (pcbgroup != NULL)
1247                         return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1248                             fport, laddr, lport, lookupflags, ifp));
1249 #ifndef RSS
1250                 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1251                     fport);
1252                 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1253                     laddr, lport, lookupflags, ifp));
1254 #endif
1255         }
1256 #endif
1257         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1258             lookupflags, ifp));
1259 }
1260
1261 void
1262 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1263 {
1264         struct ip6_hdr *ip;
1265
1266         ip = mtod(m, struct ip6_hdr *);
1267         bzero(sin6, sizeof(*sin6));
1268         sin6->sin6_len = sizeof(*sin6);
1269         sin6->sin6_family = AF_INET6;
1270         sin6->sin6_addr = ip->ip6_src;
1271
1272         (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1273
1274         return;
1275 }