sys/netinet6/in6_pcb.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * Copyright (c) 2010-2011 Juniper Networks, Inc.
   6  * All rights reserved.
   7  *
   8  * Portions of this software were developed by Robert N. M. Watson under
   9  * contract to Juniper Networks, Inc.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the project nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
  36  */
  37
  38 /*-
  39  * Copyright (c) 1982, 1986, 1991, 1993
  40  *      The Regents of the University of California.  All rights reserved.
  41  *
  42  * Redistribution and use in source and binary forms, with or without
  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  * 1. Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  * 2. Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in the
  49  *    documentation and/or other materials provided with the distribution.
  50  * 3. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)in_pcb.c    8.2 (Berkeley) 1/4/94
  67  */
  68
  69 #include <sys/cdefs.h>
  70 __FBSDID("$FreeBSD$");
  71
  72 #include "opt_inet.h"
  73 #include "opt_inet6.h"
  74 #include "opt_ipsec.h"
  75 #include "opt_route.h"
  76 #include "opt_rss.h"
  77
  78 #include <sys/hash.h>
  79 #include <sys/param.h>
  80 #include <sys/systm.h>
  81 #include <sys/malloc.h>
  82 #include <sys/mbuf.h>
  83 #include <sys/domain.h>
  84 #include <sys/protosw.h>
  85 #include <sys/socket.h>
  86 #include <sys/socketvar.h>
  87 #include <sys/sockio.h>
  88 #include <sys/errno.h>
  89 #include <sys/time.h>
  90 #include <sys/priv.h>
  91 #include <sys/proc.h>
  92 #include <sys/jail.h>
  93
  94 #include <vm/uma.h>
  95
  96 #include <net/if.h>
  97 #include <net/if_var.h>
  98 #include <net/if_llatbl.h>
  99 #include <net/if_types.h>
 100 #include <net/route.h>
 101 #include <net/route/nhop.h>
 102
 103 #include <netinet/in.h>
 104 #include <netinet/in_var.h>
 105 #include <netinet/in_systm.h>
 106 #include <netinet/tcp_var.h>
 107 #include <netinet/ip6.h>
 108 #include <netinet/ip_var.h>
 109
 110 #include <netinet6/ip6_var.h>
 111 #include <netinet6/nd6.h>
 112 #include <netinet/in_pcb.h>
 113 #include <netinet/in_pcb_var.h>
 114 #include <netinet6/in6_pcb.h>
 115 #include <netinet6/in6_fib.h>
 116 #include <netinet6/scope6_var.h>
 117
 118 int
 119 in6_pcbsetport(struct in6_addr *laddr, struct inpcb *inp, struct ucred *cred)
 120 {
 121         struct socket *so = inp->inp_socket;
 122         u_int16_t lport = 0;
 123         int error, lookupflags = 0;
 124 #ifdef INVARIANTS
 125         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 126 #endif
 127
 128         INP_WLOCK_ASSERT(inp);
 129         INP_HASH_WLOCK_ASSERT(pcbinfo);
 130
 131         error = prison_local_ip6(cred, laddr,
 132             ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0));
 133         if (error)
 134                 return(error);
 135
 136         /* XXX: this is redundant when called from in6_pcbbind */
 137         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT|SO_REUSEPORT_LB)) == 0)
 138                 lookupflags = INPLOOKUP_WILDCARD;
 139
 140         inp->inp_flags |= INP_ANONPORT;
 141
 142         error = in_pcb_lport(inp, NULL, &lport, cred, lookupflags);
 143         if (error != 0)
 144                 return (error);
 145
 146         inp->inp_lport = lport;
 147         if (in_pcbinshash(inp) != 0) {
 148                 inp->in6p_laddr = in6addr_any;
 149                 inp->inp_lport = 0;
 150                 return (EAGAIN);
 151         }
 152
 153         return (0);
 154 }
 155
 156 int
 157 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam,
 158     struct ucred *cred)
 159 {
 160         struct socket *so = inp->inp_socket;
 161         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
 162         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 163         u_short lport = 0;
 164         int error, lookupflags = 0;
 165         int reuseport = (so->so_options & SO_REUSEPORT);
 166
 167         /*
 168          * XXX: Maybe we could let SO_REUSEPORT_LB set SO_REUSEPORT bit here
 169          * so that we don't have to add to the (already messy) code below.
 170          */
 171         int reuseport_lb = (so->so_options & SO_REUSEPORT_LB);
 172
 173         INP_WLOCK_ASSERT(inp);
 174         INP_HASH_WLOCK_ASSERT(pcbinfo);
 175
 176         if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 177                 return (EINVAL);
 178         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT|SO_REUSEPORT_LB)) == 0)
 179                 lookupflags = INPLOOKUP_WILDCARD;
 180         if (nam == NULL) {
 181                 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
 182                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 183                         return (error);
 184         } else {
 185                 sin6 = (struct sockaddr_in6 *)nam;
 186                 KASSERT(sin6->sin6_family == AF_INET6,
 187                     ("%s: invalid address family for %p", __func__, sin6));
 188                 KASSERT(sin6->sin6_len == sizeof(*sin6),
 189                     ("%s: invalid address length for %p", __func__, sin6));
 190
 191                 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 192                         return(error);
 193
 194                 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
 195                     ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
 196                         return (error);
 197
 198                 lport = sin6->sin6_port;
 199                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 200                         /*
 201                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 202                          * allow compepte duplication of binding if
 203                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 204                          * and a multicast address is bound on both
 205                          * new and duplicated sockets.
 206                          */
 207                         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
 208                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
 209                         /*
 210                          * XXX: How to deal with SO_REUSEPORT_LB here?
 211                          * Treat same as SO_REUSEPORT for now.
 212                          */
 213                         if ((so->so_options &
 214                             (SO_REUSEADDR|SO_REUSEPORT_LB)) != 0)
 215                                 reuseport_lb = SO_REUSEADDR|SO_REUSEPORT_LB;
 216                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 217                         struct epoch_tracker et;
 218                         struct ifaddr *ifa;
 219
 220                         sin6->sin6_port = 0;            /* yech... */
 221                         NET_EPOCH_ENTER(et);
 222                         if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
 223                             NULL &&
 224                             (inp->inp_flags & INP_BINDANY) == 0) {
 225                                 NET_EPOCH_EXIT(et);
 226                                 return (EADDRNOTAVAIL);
 227                         }
 228
 229                         /*
 230                          * XXX: bind to an anycast address might accidentally
 231                          * cause sending a packet with anycast source address.
 232                          * We should allow to bind to a deprecated address, since
 233                          * the application dares to use it.
 234                          */
 235                         if (ifa != NULL &&
 236                             ((struct in6_ifaddr *)ifa)->ia6_flags &
 237                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
 238                                 NET_EPOCH_EXIT(et);
 239                                 return (EADDRNOTAVAIL);
 240                         }
 241                         NET_EPOCH_EXIT(et);
 242                 }
 243                 if (lport) {
 244                         struct inpcb *t;
 245                         struct tcptw *tw;
 246
 247                         /* GROSS */
 248                         if (ntohs(lport) <= V_ipport_reservedhigh &&
 249                             ntohs(lport) >= V_ipport_reservedlow &&
 250                             priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT))
 251                                 return (EACCES);
 252                         if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
 253                             priv_check_cred(inp->inp_cred, PRIV_NETINET_REUSEPORT) != 0) {
 254                                 t = in6_pcblookup_local(pcbinfo,
 255                                     &sin6->sin6_addr, lport,
 256                                     INPLOOKUP_WILDCARD, cred);
 257                                 if (t &&
 258                                     ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
 259                                     ((t->inp_flags & INP_TIMEWAIT) == 0) &&
 260                                     (so->so_type != SOCK_STREAM ||
 261                                      IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
 262                                     (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 263                                      !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
 264                                      (t->inp_flags2 & INP_REUSEPORT) ||
 265                                      (t->inp_flags2 & INP_REUSEPORT_LB) == 0) &&
 266                                     (inp->inp_cred->cr_uid !=
 267                                      t->inp_cred->cr_uid))
 268                                         return (EADDRINUSE);
 269
 270                                 /*
 271                                  * If the socket is a BINDMULTI socket, then
 272                                  * the credentials need to match and the
 273                                  * original socket also has to have been bound
 274                                  * with BINDMULTI.
 275                                  */
 276                                 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
 277                                         return (EADDRINUSE);
 278
 279 #ifdef INET
 280                                 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 281                                     IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 282                                         struct sockaddr_in sin;
 283
 284                                         in6_sin6_2_sin(&sin, sin6);
 285                                         t = in_pcblookup_local(pcbinfo,
 286                                             sin.sin_addr, lport,
 287                                             INPLOOKUP_WILDCARD, cred);
 288                                         if (t &&
 289                                             ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
 290                                             ((t->inp_flags &
 291                                               INP_TIMEWAIT) == 0) &&
 292                                             (so->so_type != SOCK_STREAM ||
 293                                              ntohl(t->inp_faddr.s_addr) ==
 294                                               INADDR_ANY) &&
 295                                             (inp->inp_cred->cr_uid !=
 296                                              t->inp_cred->cr_uid))
 297                                                 return (EADDRINUSE);
 298
 299                                         if (t && (! in_pcbbind_check_bindmulti(inp, t)))
 300                                                 return (EADDRINUSE);
 301                                 }
 302 #endif
 303                         }
 304                         t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
 305                             lport, lookupflags, cred);
 306                         if (t && (t->inp_flags & INP_TIMEWAIT)) {
 307                                 /*
 308                                  * XXXRW: If an incpb has had its timewait
 309                                  * state recycled, we treat the address as
 310                                  * being in use (for now).  This is better
 311                                  * than a panic, but not desirable.
 312                                  */
 313                                 tw = intotw(t);
 314                                 if (tw == NULL ||
 315                                     ((reuseport & tw->tw_so_options) == 0 &&
 316                                          (reuseport_lb & tw->tw_so_options) == 0))
 317                                         return (EADDRINUSE);
 318                         } else if (t && (reuseport & inp_so_options(t)) == 0 &&
 319                                            (reuseport_lb & inp_so_options(t)) == 0) {
 320                                 return (EADDRINUSE);
 321                         }
 322 #ifdef INET
 323                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 324                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 325                                 struct sockaddr_in sin;
 326
 327                                 in6_sin6_2_sin(&sin, sin6);
 328                                 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
 329                                    lport, lookupflags, cred);
 330                                 if (t && t->inp_flags & INP_TIMEWAIT) {
 331                                         tw = intotw(t);
 332                                         if (tw == NULL)
 333                                                 return (EADDRINUSE);
 334                                         if ((reuseport & tw->tw_so_options) == 0
 335                                             && (reuseport_lb & tw->tw_so_options) == 0
 336                                             && (ntohl(t->inp_laddr.s_addr) !=
 337                                                 INADDR_ANY || ((inp->inp_vflag &
 338                                                         INP_IPV6PROTO) ==
 339                                                     (t->inp_vflag & INP_IPV6PROTO))))
 340                                                 return (EADDRINUSE);
 341                                 } else if (t &&
 342                                     (reuseport & inp_so_options(t)) == 0 &&
 343                                     (reuseport_lb & inp_so_options(t)) == 0 &&
 344                                     (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
 345                                         (t->inp_vflag & INP_IPV6PROTO) != 0)) {
 346                                         return (EADDRINUSE);
 347                                 }
 348                         }
 349 #endif
 350                 }
 351                 inp->in6p_laddr = sin6->sin6_addr;
 352         }
 353         if (lport == 0) {
 354                 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
 355                         /* Undo an address bind that may have occurred. */
 356                         inp->in6p_laddr = in6addr_any;
 357                         return (error);
 358                 }
 359         } else {
 360                 inp->inp_lport = lport;
 361                 if (in_pcbinshash(inp) != 0) {
 362                         inp->in6p_laddr = in6addr_any;
 363                         inp->inp_lport = 0;
 364                         return (EAGAIN);
 365                 }
 366         }
 367         return (0);
 368 }
 369
 370 /*
 371  *   Transform old in6_pcbconnect() into an inner subroutine for new
 372  *   in6_pcbconnect(): Do some validity-checking on the remote
 373  *   address (in mbuf 'nam') and then determine local host address
 374  *   (i.e., which interface) to use to access that remote host.
 375  *
 376  *   This preserves definition of in6_pcbconnect(), while supporting a
 377  *   slightly different version for T/TCP.  (This is more than
 378  *   a bit of a kludge, but cleaning up the internal interfaces would
 379  *   have forced minor changes in every protocol).
 380  */
 381 static int
 382 in6_pcbladdr(struct inpcb *inp, struct sockaddr_in6 *sin6,
 383     struct in6_addr *plocal_addr6)
 384 {
 385         int error = 0;
 386         int scope_ambiguous = 0;
 387         struct in6_addr in6a;
 388         struct epoch_tracker et;
 389
 390         INP_WLOCK_ASSERT(inp);
 391         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);        /* XXXRW: why? */
 392
 393         if (sin6->sin6_port == 0)
 394                 return (EADDRNOTAVAIL);
 395
 396         if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
 397                 scope_ambiguous = 1;
 398         if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 399                 return(error);
 400
 401         if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) {
 402                 /*
 403                  * If the destination address is UNSPECIFIED addr,
 404                  * use the loopback addr, e.g ::1.
 405                  */
 406                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 407                         sin6->sin6_addr = in6addr_loopback;
 408         }
 409         if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 410                 return (error);
 411
 412         NET_EPOCH_ENTER(et);
 413         error = in6_selectsrc_socket(sin6, inp->in6p_outputopts,
 414             inp, inp->inp_cred, scope_ambiguous, &in6a, NULL);
 415         NET_EPOCH_EXIT(et);
 416         if (error)
 417                 return (error);
 418
 419         /*
 420          * Do not update this earlier, in case we return with an error.
 421          *
 422          * XXX: this in6_selectsrc_socket result might replace the bound local
 423          * address with the address specified by setsockopt(IPV6_PKTINFO).
 424          * Is it the intended behavior?
 425          */
 426         *plocal_addr6 = in6a;
 427
 428         /*
 429          * Don't do pcblookup call here; return interface in
 430          * plocal_addr6
 431          * and exit to caller, that will do the lookup.
 432          */
 433
 434         return (0);
 435 }
 436
 437 /*
 438  * Outer subroutine:
 439  * Connect from a socket to a specified address.
 440  * Both address and port must be specified in argument sin.
 441  * If don't have a local address for this socket yet,
 442  * then pick one.
 443  */
 444 int
 445 in6_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam,
 446     struct ucred *cred, struct mbuf *m, bool rehash)
 447 {
 448         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 449         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 450         struct sockaddr_in6 laddr6;
 451         int error;
 452
 453         KASSERT(sin6->sin6_family == AF_INET6,
 454             ("%s: invalid address family for %p", __func__, sin6));
 455         KASSERT(sin6->sin6_len == sizeof(*sin6),
 456             ("%s: invalid address length for %p", __func__, sin6));
 457
 458         bzero(&laddr6, sizeof(laddr6));
 459         laddr6.sin6_family = AF_INET6;
 460
 461         INP_WLOCK_ASSERT(inp);
 462         INP_HASH_WLOCK_ASSERT(pcbinfo);
 463
 464 #ifdef ROUTE_MPATH
 465         if (CALC_FLOWID_OUTBOUND) {
 466                 uint32_t hash_type, hash_val;
 467
 468                 hash_val = fib6_calc_software_hash(&inp->in6p_laddr,
 469                     &sin6->sin6_addr, 0, sin6->sin6_port,
 470                     inp->inp_socket->so_proto->pr_protocol, &hash_type);
 471                 inp->inp_flowid = hash_val;
 472                 inp->inp_flowtype = hash_type;
 473         }
 474 #endif
 475         /*
 476          * Call inner routine, to assign local interface address.
 477          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 478          */
 479         if ((error = in6_pcbladdr(inp, sin6, &laddr6.sin6_addr)) != 0)
 480                 return (error);
 481
 482         if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
 483                                sin6->sin6_port,
 484                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 485                               ? &laddr6.sin6_addr : &inp->in6p_laddr,
 486                               inp->inp_lport, 0, NULL, M_NODOM) != NULL) {
 487                 return (EADDRINUSE);
 488         }
 489         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 490                 if (inp->inp_lport == 0) {
 491                         /*
 492                          * rehash was required to be true in the past for
 493                          * this case; retain that convention.  However,
 494                          * we now call in_pcb_lport_dest rather than
 495                          * in6_pcbbind; the former does not insert into
 496                          * the hash table, the latter does.  Change rehash
 497                          * to false to do the in_pcbinshash below.
 498                          */
 499                         KASSERT(rehash == true,
 500                             ("Rehashing required for unbound inps"));
 501                         rehash = false;
 502                         error = in_pcb_lport_dest(inp,
 503                             (struct sockaddr *) &laddr6, &inp->inp_lport,
 504                             (struct sockaddr *) sin6, sin6->sin6_port, cred,
 505                             INPLOOKUP_WILDCARD);
 506                         if (error)
 507                                 return (error);
 508                 }
 509                 inp->in6p_laddr = laddr6.sin6_addr;
 510         }
 511         inp->in6p_faddr = sin6->sin6_addr;
 512         inp->inp_fport = sin6->sin6_port;
 513         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 514         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 515         if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
 516                 inp->inp_flow |=
 517                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 518
 519         if (rehash) {
 520                 in_pcbrehash(inp);
 521         } else {
 522                 in_pcbinshash(inp);
 523         }
 524
 525         return (0);
 526 }
 527
 528 int
 529 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 530 {
 531
 532         return (in6_pcbconnect_mbuf(inp, nam, cred, NULL, true));
 533 }
 534
 535 void
 536 in6_pcbdisconnect(struct inpcb *inp)
 537 {
 538
 539         INP_WLOCK_ASSERT(inp);
 540         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
 541
 542         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 543         inp->inp_fport = 0;
 544         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 545         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 546         in_pcbrehash(inp);
 547 }
 548
 549 struct sockaddr *
 550 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
 551 {
 552         struct sockaddr_in6 *sin6;
 553
 554         sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
 555         bzero(sin6, sizeof *sin6);
 556         sin6->sin6_family = AF_INET6;
 557         sin6->sin6_len = sizeof(*sin6);
 558         sin6->sin6_port = port;
 559         sin6->sin6_addr = *addr_p;
 560         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
 561
 562         return (struct sockaddr *)sin6;
 563 }
 564
 565 struct sockaddr *
 566 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
 567 {
 568         struct sockaddr_in sin;
 569         struct sockaddr_in6 *sin6_p;
 570
 571         bzero(&sin, sizeof sin);
 572         sin.sin_family = AF_INET;
 573         sin.sin_len = sizeof(sin);
 574         sin.sin_port = port;
 575         sin.sin_addr = *addr_p;
 576
 577         sin6_p = malloc(sizeof *sin6_p, M_SONAME,
 578                 M_WAITOK);
 579         in6_sin_2_v4mapsin6(&sin, sin6_p);
 580
 581         return (struct sockaddr *)sin6_p;
 582 }
 583
 584 int
 585 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
 586 {
 587         struct inpcb *inp;
 588         struct in6_addr addr;
 589         in_port_t port;
 590
 591         inp = sotoinpcb(so);
 592         KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
 593
 594         INP_RLOCK(inp);
 595         port = inp->inp_lport;
 596         addr = inp->in6p_laddr;
 597         INP_RUNLOCK(inp);
 598
 599         *nam = in6_sockaddr(port, &addr);
 600         return 0;
 601 }
 602
 603 int
 604 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
 605 {
 606         struct inpcb *inp;
 607         struct in6_addr addr;
 608         in_port_t port;
 609
 610         inp = sotoinpcb(so);
 611         KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
 612
 613         INP_RLOCK(inp);
 614         port = inp->inp_fport;
 615         addr = inp->in6p_faddr;
 616         INP_RUNLOCK(inp);
 617
 618         *nam = in6_sockaddr(port, &addr);
 619         return 0;
 620 }
 621
 622 int
 623 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
 624 {
 625         struct  inpcb *inp;
 626         int     error;
 627
 628         inp = sotoinpcb(so);
 629         KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
 630
 631 #ifdef INET
 632         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 633                 error = in_getsockaddr(so, nam);
 634                 if (error == 0)
 635                         in6_sin_2_v4mapsin6_in_sock(nam);
 636         } else
 637 #endif
 638         {
 639                 /* scope issues will be handled in in6_getsockaddr(). */
 640                 error = in6_getsockaddr(so, nam);
 641         }
 642
 643         return error;
 644 }
 645
 646 int
 647 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
 648 {
 649         struct  inpcb *inp;
 650         int     error;
 651
 652         inp = sotoinpcb(so);
 653         KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
 654
 655 #ifdef INET
 656         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 657                 error = in_getpeeraddr(so, nam);
 658                 if (error == 0)
 659                         in6_sin_2_v4mapsin6_in_sock(nam);
 660         } else
 661 #endif
 662         /* scope issues will be handled in in6_getpeeraddr(). */
 663         error = in6_getpeeraddr(so, nam);
 664
 665         return error;
 666 }
 667
 668 /*
 669  * Pass some notification to all connections of a protocol
 670  * associated with address dst.  The local address and/or port numbers
 671  * may be specified to limit the search.  The "usual action" will be
 672  * taken, depending on the ctlinput cmd.  The caller must filter any
 673  * cmds that are uninteresting (e.g., no error in the map).
 674  * Call the protocol specific routine (if any) to report
 675  * any errors for each matching socket.
 676  */
 677 static bool
 678 inp_match6(const struct inpcb *inp, void *v __unused)
 679 {
 680
 681         return ((inp->inp_vflag & INP_IPV6) != 0);
 682 }
 683 void
 684 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
 685     u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
 686     int cmd, void *cmdarg,
 687     struct inpcb *(*notify)(struct inpcb *, int))
 688 {
 689         struct inpcb_iterator inpi = INP_ITERATOR(pcbinfo, INPLOOKUP_WLOCKPCB,
 690             inp_match6, NULL);
 691         struct inpcb *inp;
 692         struct sockaddr_in6 sa6_src, *sa6_dst;
 693         u_short fport = fport_arg, lport = lport_arg;
 694         u_int32_t flowinfo;
 695         int errno;
 696
 697         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
 698                 return;
 699
 700         sa6_dst = (struct sockaddr_in6 *)dst;
 701         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 702                 return;
 703
 704         /*
 705          * note that src can be NULL when we get notify by local fragmentation.
 706          */
 707         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
 708         flowinfo = sa6_src.sin6_flowinfo;
 709
 710         /*
 711          * Redirects go to all references to the destination,
 712          * and use in6_rtchange to invalidate the route cache.
 713          * Dead host indications: also use in6_rtchange to invalidate
 714          * the cache, and deliver the error to all the sockets.
 715          * Otherwise, if we have knowledge of the local port and address,
 716          * deliver only to that socket.
 717          */
 718         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
 719                 fport = 0;
 720                 lport = 0;
 721                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
 722
 723                 if (cmd != PRC_HOSTDEAD)
 724                         notify = in6_rtchange;
 725         }
 726         errno = inet6ctlerrmap[cmd];
 727         while ((inp = inp_next(&inpi)) != NULL) {
 728                 INP_WLOCK_ASSERT(inp);
 729                 /*
 730                  * If the error designates a new path MTU for a destination
 731                  * and the application (associated with this socket) wanted to
 732                  * know the value, notify.
 733                  * XXX: should we avoid to notify the value to TCP sockets?
 734                  */
 735                 if (cmd == PRC_MSGSIZE && cmdarg != NULL)
 736                         ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
 737                                         *(u_int32_t *)cmdarg);
 738
 739                 /*
 740                  * Detect if we should notify the error. If no source and
 741                  * destination ports are specified, but non-zero flowinfo and
 742                  * local address match, notify the error. This is the case
 743                  * when the error is delivered with an encrypted buffer
 744                  * by ESP. Otherwise, just compare addresses and ports
 745                  * as usual.
 746                  */
 747                 if (lport == 0 && fport == 0 && flowinfo &&
 748                     inp->inp_socket != NULL &&
 749                     flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
 750                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 751                         goto do_notify;
 752                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 753                                              &sa6_dst->sin6_addr) ||
 754                          inp->inp_socket == 0 ||
 755                          (lport && inp->inp_lport != lport) ||
 756                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 757                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 758                                               &sa6_src.sin6_addr)) ||
 759                          (fport && inp->inp_fport != fport)) {
 760                         continue;
 761                 }
 762
 763           do_notify:
 764                 if (notify)
 765                         (*notify)(inp, errno);
 766         }
 767 }
 768
 769 /*
 770  * Lookup a PCB based on the local address and port.  Caller must hold the
 771  * hash lock.  No inpcb locks or references are acquired.
 772  */
 773 struct inpcb *
 774 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
 775     u_short lport, int lookupflags, struct ucred *cred)
 776 {
 777         struct inpcb *inp;
 778         int matchwild = 3, wildcard;
 779
 780         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 781             ("%s: invalid lookup flags %d", __func__, lookupflags));
 782
 783         INP_HASH_LOCK_ASSERT(pcbinfo);
 784
 785         if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
 786                 struct inpcbhead *head;
 787                 /*
 788                  * Look for an unconnected (wildcard foreign addr) PCB that
 789                  * matches the local address and port we're looking for.
 790                  */
 791                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH_WILD(lport,
 792                     pcbinfo->ipi_hashmask)];
 793                 CK_LIST_FOREACH(inp, head, inp_hash) {
 794                         /* XXX inp locking */
 795                         if ((inp->inp_vflag & INP_IPV6) == 0)
 796                                 continue;
 797                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
 798                             IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 799                             inp->inp_lport == lport) {
 800                                 /* Found. */
 801                                 if (cred == NULL ||
 802                                     prison_equal_ip6(cred->cr_prison,
 803                                         inp->inp_cred->cr_prison))
 804                                         return (inp);
 805                         }
 806                 }
 807                 /*
 808                  * Not found.
 809                  */
 810                 return (NULL);
 811         } else {
 812                 struct inpcbporthead *porthash;
 813                 struct inpcbport *phd;
 814                 struct inpcb *match = NULL;
 815                 /*
 816                  * Best fit PCB lookup.
 817                  *
 818                  * First see if this local port is in use by looking on the
 819                  * port hash list.
 820                  */
 821                 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
 822                     pcbinfo->ipi_porthashmask)];
 823                 CK_LIST_FOREACH(phd, porthash, phd_hash) {
 824                         if (phd->phd_port == lport)
 825                                 break;
 826                 }
 827                 if (phd != NULL) {
 828                         /*
 829                          * Port is in use by one or more PCBs. Look for best
 830                          * fit.
 831                          */
 832                         CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 833                                 wildcard = 0;
 834                                 if (cred != NULL &&
 835                                     !prison_equal_ip6(cred->cr_prison,
 836                                         inp->inp_cred->cr_prison))
 837                                         continue;
 838                                 /* XXX inp locking */
 839                                 if ((inp->inp_vflag & INP_IPV6) == 0)
 840                                         continue;
 841                                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 842                                         wildcard++;
 843                                 if (!IN6_IS_ADDR_UNSPECIFIED(
 844                                         &inp->in6p_laddr)) {
 845                                         if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 846                                                 wildcard++;
 847                                         else if (!IN6_ARE_ADDR_EQUAL(
 848                                             &inp->in6p_laddr, laddr))
 849                                                 continue;
 850                                 } else {
 851                                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 852                                                 wildcard++;
 853                                 }
 854                                 if (wildcard < matchwild) {
 855                                         match = inp;
 856                                         matchwild = wildcard;
 857                                         if (matchwild == 0)
 858                                                 break;
 859                                 }
 860                         }
 861                 }
 862                 return (match);
 863         }
 864 }
 865
 866 static bool
 867 in6_multi_match(const struct inpcb *inp, void *v __unused)
 868 {
 869
 870         if ((inp->inp_vflag & INP_IPV6) && inp->in6p_moptions != NULL)
 871                 return (true);
 872         else
 873                 return (false);
 874 }
 875
 876 void
 877 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 878 {
 879         struct inpcb_iterator inpi = INP_ITERATOR(pcbinfo, INPLOOKUP_RLOCKPCB,
 880             in6_multi_match, NULL);
 881         struct inpcb *inp;
 882         struct in6_multi *inm;
 883         struct in6_mfilter *imf;
 884         struct ip6_moptions *im6o;
 885
 886         IN6_MULTI_LOCK_ASSERT();
 887
 888         while ((inp = inp_next(&inpi)) != NULL) {
 889                 INP_RLOCK_ASSERT(inp);
 890
 891                 im6o = inp->in6p_moptions;
 892                 /*
 893                  * Unselect the outgoing ifp for multicast if it
 894                  * is being detached.
 895                  */
 896                 if (im6o->im6o_multicast_ifp == ifp)
 897                         im6o->im6o_multicast_ifp = NULL;
 898                 /*
 899                  * Drop multicast group membership if we joined
 900                  * through the interface being detached.
 901                  */
 902 restart:
 903                 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) {
 904                         if ((inm = imf->im6f_in6m) == NULL)
 905                                 continue;
 906                         if (inm->in6m_ifp != ifp)
 907                                 continue;
 908                         ip6_mfilter_remove(&im6o->im6o_head, imf);
 909                         in6_leavegroup_locked(inm, NULL);
 910                         ip6_mfilter_free(imf);
 911                         goto restart;
 912                 }
 913         }
 914 }
 915
 916 /*
 917  * Check for alternatives when higher level complains
 918  * about service problems.  For now, invalidate cached
 919  * routing information.  If the route was created dynamically
 920  * (by a redirect), time to try a default gateway again.
 921  */
 922 void
 923 in6_losing(struct inpcb *inp)
 924 {
 925
 926         RO_INVALIDATE_CACHE(&inp->inp_route6);
 927 }
 928
 929 /*
 930  * After a routing change, flush old routing
 931  * and allocate a (hopefully) better one.
 932  */
 933 struct inpcb *
 934 in6_rtchange(struct inpcb *inp, int errno __unused)
 935 {
 936
 937         RO_INVALIDATE_CACHE(&inp->inp_route6);
 938         return inp;
 939 }
 940
 941 static struct inpcb *
 942 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo,
 943     const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr,
 944     uint16_t fport, int lookupflags, uint8_t numa_domain)
 945 {
 946         struct inpcb *local_wild, *numa_wild;
 947         const struct inpcblbgrouphead *hdr;
 948         struct inpcblbgroup *grp;
 949         uint32_t idx;
 950
 951         INP_HASH_LOCK_ASSERT(pcbinfo);
 952
 953         hdr = &pcbinfo->ipi_lbgrouphashbase[
 954             INP_PCBPORTHASH(lport, pcbinfo->ipi_lbgrouphashmask)];
 955
 956         /*
 957          * Order of socket selection:
 958          * 1. non-wild.
 959          * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD).
 960          *
 961          * NOTE:
 962          * - Load balanced group does not contain jailed sockets.
 963          * - Load balanced does not contain IPv4 mapped INET6 wild sockets.
 964          */
 965         local_wild = NULL;
 966         numa_wild = NULL;
 967         CK_LIST_FOREACH(grp, hdr, il_list) {
 968 #ifdef INET
 969                 if (!(grp->il_vflag & INP_IPV6))
 970                         continue;
 971 #endif
 972                 if (grp->il_lport != lport)
 973                         continue;
 974
 975                 idx = INP6_PCBLBGROUP_PKTHASH(faddr, lport, fport) %
 976                     grp->il_inpcnt;
 977                 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) {
 978                         if (numa_domain == M_NODOM ||
 979                             grp->il_numa_domain == numa_domain) {
 980                                 return (grp->il_inp[idx]);
 981                         }
 982                         else
 983                                 numa_wild = grp->il_inp[idx];
 984                 }
 985                 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) &&
 986                     (lookupflags & INPLOOKUP_WILDCARD) != 0 &&
 987                     (local_wild == NULL || numa_domain == M_NODOM ||
 988                         grp->il_numa_domain == numa_domain)) {
 989                         local_wild = grp->il_inp[idx];
 990                 }
 991         }
 992         if (numa_wild != NULL)
 993                 return (numa_wild);
 994         return (local_wild);
 995 }
 996
 997 /*
 998  * Lookup PCB in hash list.  Used in in_pcb.c as well as here.
 999  */
1000 struct inpcb *
1001 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1002     u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1003     int lookupflags, struct ifnet *ifp, uint8_t numa_domain)
1004 {
1005         struct inpcbhead *head;
1006         struct inpcb *inp, *tmpinp;
1007         u_short fport = fport_arg, lport = lport_arg;
1008
1009         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1010             ("%s: invalid lookup flags %d", __func__, lookupflags));
1011
1012         INP_HASH_LOCK_ASSERT(pcbinfo);
1013
1014         /*
1015          * First look for an exact match.
1016          */
1017         tmpinp = NULL;
1018         head = &pcbinfo->ipi_hashbase[INP6_PCBHASH(faddr, lport, fport,
1019             pcbinfo->ipi_hashmask)];
1020         CK_LIST_FOREACH(inp, head, inp_hash) {
1021                 /* XXX inp locking */
1022                 if ((inp->inp_vflag & INP_IPV6) == 0)
1023                         continue;
1024                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1025                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1026                     inp->inp_fport == fport &&
1027                     inp->inp_lport == lport) {
1028                         /*
1029                          * XXX We should be able to directly return
1030                          * the inp here, without any checks.
1031                          * Well unless both bound with SO_REUSEPORT?
1032                          */
1033                         if (prison_flag(inp->inp_cred, PR_IP6))
1034                                 return (inp);
1035                         if (tmpinp == NULL)
1036                                 tmpinp = inp;
1037                 }
1038         }
1039         if (tmpinp != NULL)
1040                 return (tmpinp);
1041
1042         /*
1043          * Then look in lb group (for wildcard match).
1044          */
1045         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1046                 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr,
1047                     fport, lookupflags, numa_domain);
1048                 if (inp != NULL)
1049                         return (inp);
1050         }
1051
1052         /*
1053          * Then look for a wildcard match, if requested.
1054          */
1055         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1056                 struct inpcb *local_wild = NULL, *local_exact = NULL;
1057                 struct inpcb *jail_wild = NULL;
1058                 int injail;
1059
1060                 /*
1061                  * Order of socket selection - we always prefer jails.
1062                  *      1. jailed, non-wild.
1063                  *      2. jailed, wild.
1064                  *      3. non-jailed, non-wild.
1065                  *      4. non-jailed, wild.
1066                  */
1067                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH_WILD(lport,
1068                     pcbinfo->ipi_hashmask)];
1069                 CK_LIST_FOREACH(inp, head, inp_hash) {
1070                         /* XXX inp locking */
1071                         if ((inp->inp_vflag & INP_IPV6) == 0)
1072                                 continue;
1073
1074                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1075                             inp->inp_lport != lport) {
1076                                 continue;
1077                         }
1078
1079                         injail = prison_flag(inp->inp_cred, PR_IP6);
1080                         if (injail) {
1081                                 if (prison_check_ip6_locked(
1082                                     inp->inp_cred->cr_prison, laddr) != 0)
1083                                         continue;
1084                         } else {
1085                                 if (local_exact != NULL)
1086                                         continue;
1087                         }
1088
1089                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1090                                 if (injail)
1091                                         return (inp);
1092                                 else
1093                                         local_exact = inp;
1094                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1095                                 if (injail)
1096                                         jail_wild = inp;
1097                                 else
1098                                         local_wild = inp;
1099                         }
1100                 } /* LIST_FOREACH */
1101
1102                 if (jail_wild != NULL)
1103                         return (jail_wild);
1104                 if (local_exact != NULL)
1105                         return (local_exact);
1106                 if (local_wild != NULL)
1107                         return (local_wild);
1108         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1109
1110         /*
1111          * Not found.
1112          */
1113         return (NULL);
1114 }
1115
1116 /*
1117  * Lookup PCB in hash list, using pcbinfo tables.  This variation locks the
1118  * hash list lock, and will return the inpcb locked (i.e., requires
1119  * INPLOOKUP_LOCKPCB).
1120  */
1121 static struct inpcb *
1122 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1123     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1124     struct ifnet *ifp, uint8_t numa_domain)
1125 {
1126         struct inpcb *inp;
1127
1128         smr_enter(pcbinfo->ipi_smr);
1129         inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1130             lookupflags & INPLOOKUP_WILDCARD, ifp, numa_domain);
1131         if (inp != NULL) {
1132                 if (__predict_false(inp_smr_lock(inp,
1133                     (lookupflags & INPLOOKUP_LOCKMASK)) == false))
1134                         inp = NULL;
1135         } else
1136                 smr_exit(pcbinfo->ipi_smr);
1137
1138         return (inp);
1139 }
1140
1141 /*
1142  * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1143  * from which a pre-calculated hash value may be extracted.
1144  */
1145 struct inpcb *
1146 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1147     struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1148 {
1149
1150         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1151             ("%s: invalid lookup flags %d", __func__, lookupflags));
1152         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1153             ("%s: LOCKPCB not set", __func__));
1154
1155         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1156             lookupflags, ifp, M_NODOM));
1157 }
1158
1159 struct inpcb *
1160 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1161     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1162     struct ifnet *ifp, struct mbuf *m)
1163 {
1164
1165         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1166             ("%s: invalid lookup flags %d", __func__, lookupflags));
1167         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1168             ("%s: LOCKPCB not set", __func__));
1169
1170         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1171             lookupflags, ifp, m->m_pkthdr.numa_domain));
1172 }
1173
1174 void
1175 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst)
1176 {
1177         struct ip6_hdr *ip;
1178
1179         ip = mtod(m, struct ip6_hdr *);
1180         bzero(sin6, sizeof(*sin6));
1181         sin6->sin6_len = sizeof(*sin6);
1182         sin6->sin6_family = AF_INET6;
1183         sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src;
1184
1185         (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1186
1187         return;
1188 }