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
 246                         /* GROSS */
 247                         if (ntohs(lport) <= V_ipport_reservedhigh &&
 248                             ntohs(lport) >= V_ipport_reservedlow &&
 249                             priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT))
 250                                 return (EACCES);
 251                         if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
 252                             priv_check_cred(inp->inp_cred, PRIV_NETINET_REUSEPORT) != 0) {
 253                                 t = in6_pcblookup_local(pcbinfo,
 254                                     &sin6->sin6_addr, lport,
 255                                     INPLOOKUP_WILDCARD, cred);
 256                                 if (t &&
 257                                     ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
 258                                     ((t->inp_flags & INP_TIMEWAIT) == 0) &&
 259                                     (so->so_type != SOCK_STREAM ||
 260                                      IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
 261                                     (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 262                                      !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
 263                                      (t->inp_flags2 & INP_REUSEPORT) ||
 264                                      (t->inp_flags2 & INP_REUSEPORT_LB) == 0) &&
 265                                     (inp->inp_cred->cr_uid !=
 266                                      t->inp_cred->cr_uid))
 267                                         return (EADDRINUSE);
 268
 269                                 /*
 270                                  * If the socket is a BINDMULTI socket, then
 271                                  * the credentials need to match and the
 272                                  * original socket also has to have been bound
 273                                  * with BINDMULTI.
 274                                  */
 275                                 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
 276                                         return (EADDRINUSE);
 277
 278 #ifdef INET
 279                                 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 280                                     IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 281                                         struct sockaddr_in sin;
 282
 283                                         in6_sin6_2_sin(&sin, sin6);
 284                                         t = in_pcblookup_local(pcbinfo,
 285                                             sin.sin_addr, lport,
 286                                             INPLOOKUP_WILDCARD, cred);
 287                                         if (t &&
 288                                             ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
 289                                             ((t->inp_flags &
 290                                               INP_TIMEWAIT) == 0) &&
 291                                             (so->so_type != SOCK_STREAM ||
 292                                              ntohl(t->inp_faddr.s_addr) ==
 293                                               INADDR_ANY) &&
 294                                             (inp->inp_cred->cr_uid !=
 295                                              t->inp_cred->cr_uid))
 296                                                 return (EADDRINUSE);
 297
 298                                         if (t && (! in_pcbbind_check_bindmulti(inp, t)))
 299                                                 return (EADDRINUSE);
 300                                 }
 301 #endif
 302                         }
 303                         t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
 304                             lport, lookupflags, cred);
 305                         if (t && (reuseport & inp_so_options(t)) == 0 &&
 306                             (reuseport_lb & inp_so_options(t)) == 0) {
 307                                 return (EADDRINUSE);
 308                         }
 309 #ifdef INET
 310                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
 311                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 312                                 struct sockaddr_in sin;
 313
 314                                 in6_sin6_2_sin(&sin, sin6);
 315                                 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
 316                                    lport, lookupflags, cred);
 317                                 if (t &&
 318                                     (reuseport & inp_so_options(t)) == 0 &&
 319                                     (reuseport_lb & inp_so_options(t)) == 0 &&
 320                                     (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
 321                                         (t->inp_vflag & INP_IPV6PROTO) != 0)) {
 322                                         return (EADDRINUSE);
 323                                 }
 324                         }
 325 #endif
 326                 }
 327                 inp->in6p_laddr = sin6->sin6_addr;
 328         }
 329         if (lport == 0) {
 330                 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
 331                         /* Undo an address bind that may have occurred. */
 332                         inp->in6p_laddr = in6addr_any;
 333                         return (error);
 334                 }
 335         } else {
 336                 inp->inp_lport = lport;
 337                 if (in_pcbinshash(inp) != 0) {
 338                         inp->in6p_laddr = in6addr_any;
 339                         inp->inp_lport = 0;
 340                         return (EAGAIN);
 341                 }
 342         }
 343         return (0);
 344 }
 345
 346 /*
 347  *   Transform old in6_pcbconnect() into an inner subroutine for new
 348  *   in6_pcbconnect(): Do some validity-checking on the remote
 349  *   address (in mbuf 'nam') and then determine local host address
 350  *   (i.e., which interface) to use to access that remote host.
 351  *
 352  *   This preserves definition of in6_pcbconnect(), while supporting a
 353  *   slightly different version for T/TCP.  (This is more than
 354  *   a bit of a kludge, but cleaning up the internal interfaces would
 355  *   have forced minor changes in every protocol).
 356  */
 357 static int
 358 in6_pcbladdr(struct inpcb *inp, struct sockaddr_in6 *sin6,
 359     struct in6_addr *plocal_addr6)
 360 {
 361         int error = 0;
 362         int scope_ambiguous = 0;
 363         struct in6_addr in6a;
 364         struct epoch_tracker et;
 365
 366         INP_WLOCK_ASSERT(inp);
 367         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);        /* XXXRW: why? */
 368
 369         if (sin6->sin6_port == 0)
 370                 return (EADDRNOTAVAIL);
 371
 372         if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
 373                 scope_ambiguous = 1;
 374         if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
 375                 return(error);
 376
 377         if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) {
 378                 /*
 379                  * If the destination address is UNSPECIFIED addr,
 380                  * use the loopback addr, e.g ::1.
 381                  */
 382                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 383                         sin6->sin6_addr = in6addr_loopback;
 384         }
 385         if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 386                 return (error);
 387
 388         NET_EPOCH_ENTER(et);
 389         error = in6_selectsrc_socket(sin6, inp->in6p_outputopts,
 390             inp, inp->inp_cred, scope_ambiguous, &in6a, NULL);
 391         NET_EPOCH_EXIT(et);
 392         if (error)
 393                 return (error);
 394
 395         /*
 396          * Do not update this earlier, in case we return with an error.
 397          *
 398          * XXX: this in6_selectsrc_socket result might replace the bound local
 399          * address with the address specified by setsockopt(IPV6_PKTINFO).
 400          * Is it the intended behavior?
 401          */
 402         *plocal_addr6 = in6a;
 403
 404         /*
 405          * Don't do pcblookup call here; return interface in
 406          * plocal_addr6
 407          * and exit to caller, that will do the lookup.
 408          */
 409
 410         return (0);
 411 }
 412
 413 /*
 414  * Outer subroutine:
 415  * Connect from a socket to a specified address.
 416  * Both address and port must be specified in argument sin.
 417  * If don't have a local address for this socket yet,
 418  * then pick one.
 419  */
 420 int
 421 in6_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam,
 422     struct ucred *cred, struct mbuf *m, bool rehash)
 423 {
 424         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 425         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 426         struct sockaddr_in6 laddr6;
 427         int error;
 428
 429         KASSERT(sin6->sin6_family == AF_INET6,
 430             ("%s: invalid address family for %p", __func__, sin6));
 431         KASSERT(sin6->sin6_len == sizeof(*sin6),
 432             ("%s: invalid address length for %p", __func__, sin6));
 433
 434         bzero(&laddr6, sizeof(laddr6));
 435         laddr6.sin6_family = AF_INET6;
 436
 437         INP_WLOCK_ASSERT(inp);
 438         INP_HASH_WLOCK_ASSERT(pcbinfo);
 439
 440 #ifdef ROUTE_MPATH
 441         if (CALC_FLOWID_OUTBOUND) {
 442                 uint32_t hash_type, hash_val;
 443
 444                 hash_val = fib6_calc_software_hash(&inp->in6p_laddr,
 445                     &sin6->sin6_addr, 0, sin6->sin6_port,
 446                     inp->inp_socket->so_proto->pr_protocol, &hash_type);
 447                 inp->inp_flowid = hash_val;
 448                 inp->inp_flowtype = hash_type;
 449         }
 450 #endif
 451         /*
 452          * Call inner routine, to assign local interface address.
 453          * in6_pcbladdr() may automatically fill in sin6_scope_id.
 454          */
 455         if ((error = in6_pcbladdr(inp, sin6, &laddr6.sin6_addr)) != 0)
 456                 return (error);
 457
 458         if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
 459                                sin6->sin6_port,
 460                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
 461                               ? &laddr6.sin6_addr : &inp->in6p_laddr,
 462                               inp->inp_lport, 0, NULL, M_NODOM) != NULL) {
 463                 return (EADDRINUSE);
 464         }
 465         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
 466                 if (inp->inp_lport == 0) {
 467                         /*
 468                          * rehash was required to be true in the past for
 469                          * this case; retain that convention.  However,
 470                          * we now call in_pcb_lport_dest rather than
 471                          * in6_pcbbind; the former does not insert into
 472                          * the hash table, the latter does.  Change rehash
 473                          * to false to do the in_pcbinshash below.
 474                          */
 475                         KASSERT(rehash == true,
 476                             ("Rehashing required for unbound inps"));
 477                         rehash = false;
 478                         error = in_pcb_lport_dest(inp,
 479                             (struct sockaddr *) &laddr6, &inp->inp_lport,
 480                             (struct sockaddr *) sin6, sin6->sin6_port, cred,
 481                             INPLOOKUP_WILDCARD);
 482                         if (error)
 483                                 return (error);
 484                 }
 485                 inp->in6p_laddr = laddr6.sin6_addr;
 486         }
 487         inp->in6p_faddr = sin6->sin6_addr;
 488         inp->inp_fport = sin6->sin6_port;
 489         /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 490         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 491         if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
 492                 inp->inp_flow |=
 493                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 494
 495         if (rehash) {
 496                 in_pcbrehash(inp);
 497         } else {
 498                 in_pcbinshash(inp);
 499         }
 500
 501         return (0);
 502 }
 503
 504 int
 505 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 506 {
 507
 508         return (in6_pcbconnect_mbuf(inp, nam, cred, NULL, true));
 509 }
 510
 511 void
 512 in6_pcbdisconnect(struct inpcb *inp)
 513 {
 514
 515         INP_WLOCK_ASSERT(inp);
 516         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
 517
 518         bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
 519         inp->inp_fport = 0;
 520         /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
 521         inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
 522         in_pcbrehash(inp);
 523 }
 524
 525 struct sockaddr *
 526 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
 527 {
 528         struct sockaddr_in6 *sin6;
 529
 530         sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
 531         bzero(sin6, sizeof *sin6);
 532         sin6->sin6_family = AF_INET6;
 533         sin6->sin6_len = sizeof(*sin6);
 534         sin6->sin6_port = port;
 535         sin6->sin6_addr = *addr_p;
 536         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
 537
 538         return (struct sockaddr *)sin6;
 539 }
 540
 541 struct sockaddr *
 542 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
 543 {
 544         struct sockaddr_in sin;
 545         struct sockaddr_in6 *sin6_p;
 546
 547         bzero(&sin, sizeof sin);
 548         sin.sin_family = AF_INET;
 549         sin.sin_len = sizeof(sin);
 550         sin.sin_port = port;
 551         sin.sin_addr = *addr_p;
 552
 553         sin6_p = malloc(sizeof *sin6_p, M_SONAME,
 554                 M_WAITOK);
 555         in6_sin_2_v4mapsin6(&sin, sin6_p);
 556
 557         return (struct sockaddr *)sin6_p;
 558 }
 559
 560 int
 561 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
 562 {
 563         struct inpcb *inp;
 564         struct in6_addr addr;
 565         in_port_t port;
 566
 567         inp = sotoinpcb(so);
 568         KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
 569
 570         INP_RLOCK(inp);
 571         port = inp->inp_lport;
 572         addr = inp->in6p_laddr;
 573         INP_RUNLOCK(inp);
 574
 575         *nam = in6_sockaddr(port, &addr);
 576         return 0;
 577 }
 578
 579 int
 580 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
 581 {
 582         struct inpcb *inp;
 583         struct in6_addr addr;
 584         in_port_t port;
 585
 586         inp = sotoinpcb(so);
 587         KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
 588
 589         INP_RLOCK(inp);
 590         port = inp->inp_fport;
 591         addr = inp->in6p_faddr;
 592         INP_RUNLOCK(inp);
 593
 594         *nam = in6_sockaddr(port, &addr);
 595         return 0;
 596 }
 597
 598 int
 599 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
 600 {
 601         struct  inpcb *inp;
 602         int     error;
 603
 604         inp = sotoinpcb(so);
 605         KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
 606
 607 #ifdef INET
 608         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 609                 error = in_getsockaddr(so, nam);
 610                 if (error == 0)
 611                         in6_sin_2_v4mapsin6_in_sock(nam);
 612         } else
 613 #endif
 614         {
 615                 /* scope issues will be handled in in6_getsockaddr(). */
 616                 error = in6_getsockaddr(so, nam);
 617         }
 618
 619         return error;
 620 }
 621
 622 int
 623 in6_mapped_peeraddr(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_peeraddr: inp == NULL"));
 630
 631 #ifdef INET
 632         if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
 633                 error = in_getpeeraddr(so, nam);
 634                 if (error == 0)
 635                         in6_sin_2_v4mapsin6_in_sock(nam);
 636         } else
 637 #endif
 638         /* scope issues will be handled in in6_getpeeraddr(). */
 639         error = in6_getpeeraddr(so, nam);
 640
 641         return error;
 642 }
 643
 644 /*
 645  * Pass some notification to all connections of a protocol
 646  * associated with address dst.  The local address and/or port numbers
 647  * may be specified to limit the search.  The "usual action" will be
 648  * taken, depending on the ctlinput cmd.  The caller must filter any
 649  * cmds that are uninteresting (e.g., no error in the map).
 650  * Call the protocol specific routine (if any) to report
 651  * any errors for each matching socket.
 652  */
 653 static bool
 654 inp_match6(const struct inpcb *inp, void *v __unused)
 655 {
 656
 657         return ((inp->inp_vflag & INP_IPV6) != 0);
 658 }
 659
 660 void
 661 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr_in6 *sa6_dst,
 662     u_int fport_arg, const struct sockaddr_in6 *src, u_int lport_arg,
 663     int errno, void *cmdarg,
 664     struct inpcb *(*notify)(struct inpcb *, int))
 665 {
 666         struct inpcb_iterator inpi = INP_ITERATOR(pcbinfo, INPLOOKUP_WLOCKPCB,
 667             inp_match6, NULL);
 668         struct inpcb *inp;
 669         struct sockaddr_in6 sa6_src;
 670         u_short fport = fport_arg, lport = lport_arg;
 671         u_int32_t flowinfo;
 672
 673         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
 674                 return;
 675
 676         /*
 677          * note that src can be NULL when we get notify by local fragmentation.
 678          */
 679         sa6_src = (src == NULL) ? sa6_any : *src;
 680         flowinfo = sa6_src.sin6_flowinfo;
 681
 682         while ((inp = inp_next(&inpi)) != NULL) {
 683                 INP_WLOCK_ASSERT(inp);
 684                 /*
 685                  * If the error designates a new path MTU for a destination
 686                  * and the application (associated with this socket) wanted to
 687                  * know the value, notify.
 688                  * XXX: should we avoid to notify the value to TCP sockets?
 689                  */
 690                 if (errno == EMSGSIZE && cmdarg != NULL)
 691                         ip6_notify_pmtu(inp, sa6_dst, *(uint32_t *)cmdarg);
 692
 693                 /*
 694                  * Detect if we should notify the error. If no source and
 695                  * destination ports are specified, but non-zero flowinfo and
 696                  * local address match, notify the error. This is the case
 697                  * when the error is delivered with an encrypted buffer
 698                  * by ESP. Otherwise, just compare addresses and ports
 699                  * as usual.
 700                  */
 701                 if (lport == 0 && fport == 0 && flowinfo &&
 702                     inp->inp_socket != NULL &&
 703                     flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
 704                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
 705                         goto do_notify;
 706                 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
 707                                              &sa6_dst->sin6_addr) ||
 708                          inp->inp_socket == 0 ||
 709                          (lport && inp->inp_lport != lport) ||
 710                          (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
 711                           !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
 712                                               &sa6_src.sin6_addr)) ||
 713                          (fport && inp->inp_fport != fport)) {
 714                         continue;
 715                 }
 716
 717           do_notify:
 718                 if (notify)
 719                         (*notify)(inp, errno);
 720         }
 721 }
 722
 723 /*
 724  * Lookup a PCB based on the local address and port.  Caller must hold the
 725  * hash lock.  No inpcb locks or references are acquired.
 726  */
 727 struct inpcb *
 728 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
 729     u_short lport, int lookupflags, struct ucred *cred)
 730 {
 731         struct inpcb *inp;
 732         int matchwild = 3, wildcard;
 733
 734         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 735             ("%s: invalid lookup flags %d", __func__, lookupflags));
 736
 737         INP_HASH_LOCK_ASSERT(pcbinfo);
 738
 739         if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
 740                 struct inpcbhead *head;
 741                 /*
 742                  * Look for an unconnected (wildcard foreign addr) PCB that
 743                  * matches the local address and port we're looking for.
 744                  */
 745                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH_WILD(lport,
 746                     pcbinfo->ipi_hashmask)];
 747                 CK_LIST_FOREACH(inp, head, inp_hash) {
 748                         /* XXX inp locking */
 749                         if ((inp->inp_vflag & INP_IPV6) == 0)
 750                                 continue;
 751                         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
 752                             IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 753                             inp->inp_lport == lport) {
 754                                 /* Found. */
 755                                 if (cred == NULL ||
 756                                     prison_equal_ip6(cred->cr_prison,
 757                                         inp->inp_cred->cr_prison))
 758                                         return (inp);
 759                         }
 760                 }
 761                 /*
 762                  * Not found.
 763                  */
 764                 return (NULL);
 765         } else {
 766                 struct inpcbporthead *porthash;
 767                 struct inpcbport *phd;
 768                 struct inpcb *match = NULL;
 769                 /*
 770                  * Best fit PCB lookup.
 771                  *
 772                  * First see if this local port is in use by looking on the
 773                  * port hash list.
 774                  */
 775                 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
 776                     pcbinfo->ipi_porthashmask)];
 777                 CK_LIST_FOREACH(phd, porthash, phd_hash) {
 778                         if (phd->phd_port == lport)
 779                                 break;
 780                 }
 781                 if (phd != NULL) {
 782                         /*
 783                          * Port is in use by one or more PCBs. Look for best
 784                          * fit.
 785                          */
 786                         CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 787                                 wildcard = 0;
 788                                 if (cred != NULL &&
 789                                     !prison_equal_ip6(cred->cr_prison,
 790                                         inp->inp_cred->cr_prison))
 791                                         continue;
 792                                 /* XXX inp locking */
 793                                 if ((inp->inp_vflag & INP_IPV6) == 0)
 794                                         continue;
 795                                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
 796                                         wildcard++;
 797                                 if (!IN6_IS_ADDR_UNSPECIFIED(
 798                                         &inp->in6p_laddr)) {
 799                                         if (IN6_IS_ADDR_UNSPECIFIED(laddr))
 800                                                 wildcard++;
 801                                         else if (!IN6_ARE_ADDR_EQUAL(
 802                                             &inp->in6p_laddr, laddr))
 803                                                 continue;
 804                                 } else {
 805                                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
 806                                                 wildcard++;
 807                                 }
 808                                 if (wildcard < matchwild) {
 809                                         match = inp;
 810                                         matchwild = wildcard;
 811                                         if (matchwild == 0)
 812                                                 break;
 813                                 }
 814                         }
 815                 }
 816                 return (match);
 817         }
 818 }
 819
 820 static bool
 821 in6_multi_match(const struct inpcb *inp, void *v __unused)
 822 {
 823
 824         if ((inp->inp_vflag & INP_IPV6) && inp->in6p_moptions != NULL)
 825                 return (true);
 826         else
 827                 return (false);
 828 }
 829
 830 void
 831 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 832 {
 833         struct inpcb_iterator inpi = INP_ITERATOR(pcbinfo, INPLOOKUP_RLOCKPCB,
 834             in6_multi_match, NULL);
 835         struct inpcb *inp;
 836         struct in6_multi *inm;
 837         struct in6_mfilter *imf;
 838         struct ip6_moptions *im6o;
 839
 840         IN6_MULTI_LOCK_ASSERT();
 841
 842         while ((inp = inp_next(&inpi)) != NULL) {
 843                 INP_RLOCK_ASSERT(inp);
 844
 845                 im6o = inp->in6p_moptions;
 846                 /*
 847                  * Unselect the outgoing ifp for multicast if it
 848                  * is being detached.
 849                  */
 850                 if (im6o->im6o_multicast_ifp == ifp)
 851                         im6o->im6o_multicast_ifp = NULL;
 852                 /*
 853                  * Drop multicast group membership if we joined
 854                  * through the interface being detached.
 855                  */
 856 restart:
 857                 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) {
 858                         if ((inm = imf->im6f_in6m) == NULL)
 859                                 continue;
 860                         if (inm->in6m_ifp != ifp)
 861                                 continue;
 862                         ip6_mfilter_remove(&im6o->im6o_head, imf);
 863                         in6_leavegroup_locked(inm, NULL);
 864                         ip6_mfilter_free(imf);
 865                         goto restart;
 866                 }
 867         }
 868 }
 869
 870 /*
 871  * Check for alternatives when higher level complains
 872  * about service problems.  For now, invalidate cached
 873  * routing information.  If the route was created dynamically
 874  * (by a redirect), time to try a default gateway again.
 875  */
 876 void
 877 in6_losing(struct inpcb *inp)
 878 {
 879
 880         RO_INVALIDATE_CACHE(&inp->inp_route6);
 881 }
 882
 883 /*
 884  * After a routing change, flush old routing
 885  * and allocate a (hopefully) better one.
 886  */
 887 struct inpcb *
 888 in6_rtchange(struct inpcb *inp, int errno __unused)
 889 {
 890
 891         RO_INVALIDATE_CACHE(&inp->inp_route6);
 892         return inp;
 893 }
 894
 895 static struct inpcb *
 896 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo,
 897     const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr,
 898     uint16_t fport, int lookupflags, uint8_t numa_domain)
 899 {
 900         struct inpcb *local_wild, *numa_wild;
 901         const struct inpcblbgrouphead *hdr;
 902         struct inpcblbgroup *grp;
 903         uint32_t idx;
 904
 905         INP_HASH_LOCK_ASSERT(pcbinfo);
 906
 907         hdr = &pcbinfo->ipi_lbgrouphashbase[
 908             INP_PCBPORTHASH(lport, pcbinfo->ipi_lbgrouphashmask)];
 909
 910         /*
 911          * Order of socket selection:
 912          * 1. non-wild.
 913          * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD).
 914          *
 915          * NOTE:
 916          * - Load balanced group does not contain jailed sockets.
 917          * - Load balanced does not contain IPv4 mapped INET6 wild sockets.
 918          */
 919         local_wild = NULL;
 920         numa_wild = NULL;
 921         CK_LIST_FOREACH(grp, hdr, il_list) {
 922 #ifdef INET
 923                 if (!(grp->il_vflag & INP_IPV6))
 924                         continue;
 925 #endif
 926                 if (grp->il_lport != lport)
 927                         continue;
 928
 929                 idx = INP6_PCBLBGROUP_PKTHASH(faddr, lport, fport) %
 930                     grp->il_inpcnt;
 931                 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) {
 932                         if (numa_domain == M_NODOM ||
 933                             grp->il_numa_domain == numa_domain) {
 934                                 return (grp->il_inp[idx]);
 935                         }
 936                         else
 937                                 numa_wild = grp->il_inp[idx];
 938                 }
 939                 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) &&
 940                     (lookupflags & INPLOOKUP_WILDCARD) != 0 &&
 941                     (local_wild == NULL || numa_domain == M_NODOM ||
 942                         grp->il_numa_domain == numa_domain)) {
 943                         local_wild = grp->il_inp[idx];
 944                 }
 945         }
 946         if (numa_wild != NULL)
 947                 return (numa_wild);
 948         return (local_wild);
 949 }
 950
 951 /*
 952  * Lookup PCB in hash list.  Used in in_pcb.c as well as here.
 953  */
 954 struct inpcb *
 955 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
 956     u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
 957     int lookupflags, struct ifnet *ifp, uint8_t numa_domain)
 958 {
 959         struct inpcbhead *head;
 960         struct inpcb *inp, *tmpinp;
 961         u_short fport = fport_arg, lport = lport_arg;
 962
 963         KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
 964             ("%s: invalid lookup flags %d", __func__, lookupflags));
 965
 966         INP_HASH_LOCK_ASSERT(pcbinfo);
 967
 968         /*
 969          * First look for an exact match.
 970          */
 971         tmpinp = NULL;
 972         head = &pcbinfo->ipi_hashbase[INP6_PCBHASH(faddr, lport, fport,
 973             pcbinfo->ipi_hashmask)];
 974         CK_LIST_FOREACH(inp, head, inp_hash) {
 975                 /* XXX inp locking */
 976                 if ((inp->inp_vflag & INP_IPV6) == 0)
 977                         continue;
 978                 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
 979                     IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
 980                     inp->inp_fport == fport &&
 981                     inp->inp_lport == lport) {
 982                         /*
 983                          * XXX We should be able to directly return
 984                          * the inp here, without any checks.
 985                          * Well unless both bound with SO_REUSEPORT?
 986                          */
 987                         if (prison_flag(inp->inp_cred, PR_IP6))
 988                                 return (inp);
 989                         if (tmpinp == NULL)
 990                                 tmpinp = inp;
 991                 }
 992         }
 993         if (tmpinp != NULL)
 994                 return (tmpinp);
 995
 996         /*
 997          * Then look in lb group (for wildcard match).
 998          */
 999         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1000                 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr,
1001                     fport, lookupflags, numa_domain);
1002                 if (inp != NULL)
1003                         return (inp);
1004         }
1005
1006         /*
1007          * Then look for a wildcard match, if requested.
1008          */
1009         if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1010                 struct inpcb *local_wild = NULL, *local_exact = NULL;
1011                 struct inpcb *jail_wild = NULL;
1012                 int injail;
1013
1014                 /*
1015                  * Order of socket selection - we always prefer jails.
1016                  *      1. jailed, non-wild.
1017                  *      2. jailed, wild.
1018                  *      3. non-jailed, non-wild.
1019                  *      4. non-jailed, wild.
1020                  */
1021                 head = &pcbinfo->ipi_hashbase[INP_PCBHASH_WILD(lport,
1022                     pcbinfo->ipi_hashmask)];
1023                 CK_LIST_FOREACH(inp, head, inp_hash) {
1024                         /* XXX inp locking */
1025                         if ((inp->inp_vflag & INP_IPV6) == 0)
1026                                 continue;
1027
1028                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1029                             inp->inp_lport != lport) {
1030                                 continue;
1031                         }
1032
1033                         injail = prison_flag(inp->inp_cred, PR_IP6);
1034                         if (injail) {
1035                                 if (prison_check_ip6_locked(
1036                                     inp->inp_cred->cr_prison, laddr) != 0)
1037                                         continue;
1038                         } else {
1039                                 if (local_exact != NULL)
1040                                         continue;
1041                         }
1042
1043                         if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1044                                 if (injail)
1045                                         return (inp);
1046                                 else
1047                                         local_exact = inp;
1048                         } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1049                                 if (injail)
1050                                         jail_wild = inp;
1051                                 else
1052                                         local_wild = inp;
1053                         }
1054                 } /* LIST_FOREACH */
1055
1056                 if (jail_wild != NULL)
1057                         return (jail_wild);
1058                 if (local_exact != NULL)
1059                         return (local_exact);
1060                 if (local_wild != NULL)
1061                         return (local_wild);
1062         } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1063
1064         /*
1065          * Not found.
1066          */
1067         return (NULL);
1068 }
1069
1070 /*
1071  * Lookup PCB in hash list, using pcbinfo tables.  This variation locks the
1072  * hash list lock, and will return the inpcb locked (i.e., requires
1073  * INPLOOKUP_LOCKPCB).
1074  */
1075 static struct inpcb *
1076 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1077     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1078     struct ifnet *ifp, uint8_t numa_domain)
1079 {
1080         struct inpcb *inp;
1081
1082         smr_enter(pcbinfo->ipi_smr);
1083         inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1084             lookupflags & INPLOOKUP_WILDCARD, ifp, numa_domain);
1085         if (inp != NULL) {
1086                 if (__predict_false(inp_smr_lock(inp,
1087                     (lookupflags & INPLOOKUP_LOCKMASK)) == false))
1088                         inp = NULL;
1089         } else
1090                 smr_exit(pcbinfo->ipi_smr);
1091
1092         return (inp);
1093 }
1094
1095 /*
1096  * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1097  * from which a pre-calculated hash value may be extracted.
1098  */
1099 struct inpcb *
1100 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1101     struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1102 {
1103
1104         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1105             ("%s: invalid lookup flags %d", __func__, lookupflags));
1106         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1107             ("%s: LOCKPCB not set", __func__));
1108
1109         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1110             lookupflags, ifp, M_NODOM));
1111 }
1112
1113 struct inpcb *
1114 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1115     u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1116     struct ifnet *ifp, struct mbuf *m)
1117 {
1118
1119         KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1120             ("%s: invalid lookup flags %d", __func__, lookupflags));
1121         KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1122             ("%s: LOCKPCB not set", __func__));
1123
1124         return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1125             lookupflags, ifp, m->m_pkthdr.numa_domain));
1126 }
1127
1128 void
1129 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst)
1130 {
1131         struct ip6_hdr *ip;
1132
1133         ip = mtod(m, struct ip6_hdr *);
1134         bzero(sin6, sizeof(*sin6));
1135         sin6->sin6_len = sizeof(*sin6);
1136         sin6->sin6_family = AF_INET6;
1137         sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src;
1138
1139         (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1140
1141         return;
1142 }