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sys/netinet6/in6_pcb.c

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    1 /*      $NetBSD: in6_pcb.c,v 1.75 2006/11/16 01:33:45 christos Exp $    */
    2 /*      $KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun Exp $        */
    3 
    4 /*
    5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * Copyright (c) 1982, 1986, 1991, 1993
   35  *      The Regents of the University of California.  All rights reserved.
   36  *
   37  * Redistribution and use in source and binary forms, with or without
   38  * modification, are permitted provided that the following conditions
   39  * are met:
   40  * 1. Redistributions of source code must retain the above copyright
   41  *    notice, this list of conditions and the following disclaimer.
   42  * 2. Redistributions in binary form must reproduce the above copyright
   43  *    notice, this list of conditions and the following disclaimer in the
   44  *    documentation and/or other materials provided with the distribution.
   45  * 3. Neither the name of the University nor the names of its contributors
   46  *    may be used to endorse or promote products derived from this software
   47  *    without specific prior written permission.
   48  *
   49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   59  * SUCH DAMAGE.
   60  *
   61  *      @(#)in_pcb.c    8.2 (Berkeley) 1/4/94
   62  */
   63 
   64 #include <sys/cdefs.h>
   65 __KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.75 2006/11/16 01:33:45 christos Exp $");
   66 
   67 #include "opt_inet.h"
   68 #include "opt_ipsec.h"
   69 
   70 #include <sys/param.h>
   71 #include <sys/systm.h>
   72 #include <sys/malloc.h>
   73 #include <sys/mbuf.h>
   74 #include <sys/protosw.h>
   75 #include <sys/socket.h>
   76 #include <sys/socketvar.h>
   77 #include <sys/ioctl.h>
   78 #include <sys/errno.h>
   79 #include <sys/time.h>
   80 #include <sys/proc.h>
   81 #include <sys/kauth.h>
   82 
   83 #include <net/if.h>
   84 #include <net/route.h>
   85 
   86 #include <netinet/in.h>
   87 #include <netinet/in_var.h>
   88 #include <netinet/in_systm.h>
   89 #include <netinet/ip.h>
   90 #include <netinet/in_pcb.h>
   91 #include <netinet/ip6.h>
   92 #include <netinet6/ip6_var.h>
   93 #include <netinet6/in6_pcb.h>
   94 #include <netinet6/scope6_var.h>
   95 #include <netinet6/nd6.h>
   96 
   97 #include "faith.h"
   98 
   99 #ifdef IPSEC
  100 #include <netinet6/ipsec.h>
  101 #include <netkey/key.h>
  102 #endif /* IPSEC */
  103 
  104 #ifdef FAST_IPSEC
  105 #include <netipsec/ipsec.h>
  106 #include <netipsec/ipsec6.h>
  107 #include <netipsec/key.h>
  108 #endif /* FAST_IPSEC */
  109 
  110 struct in6_addr zeroin6_addr;
  111 
  112 #define IN6PCBHASH_PORT(table, lport) \
  113         &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash]
  114 #define IN6PCBHASH_BIND(table, laddr, lport) \
  115         &(table)->inpt_bindhashtbl[ \
  116             (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
  117               (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \
  118             (table)->inpt_bindhash]
  119 #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \
  120         &(table)->inpt_bindhashtbl[ \
  121             ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \
  122               (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \
  123              (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
  124               (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \
  125               ntohs(lport))) & (table)->inpt_bindhash]
  126 
  127 int ip6_anonportmin = IPV6PORT_ANONMIN;
  128 int ip6_anonportmax = IPV6PORT_ANONMAX;
  129 int ip6_lowportmin  = IPV6PORT_RESERVEDMIN;
  130 int ip6_lowportmax  = IPV6PORT_RESERVEDMAX;
  131 
  132 POOL_INIT(in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl", NULL);
  133 
  134 void
  135 in6_pcbinit(table, bindhashsize, connecthashsize)
  136         struct inpcbtable *table;
  137         int bindhashsize, connecthashsize;
  138 {
  139 
  140         in_pcbinit(table, bindhashsize, connecthashsize);
  141         table->inpt_lastport = (u_int16_t)ip6_anonportmax;
  142 }
  143 
  144 int
  145 in6_pcballoc(so, v)
  146         struct socket *so;
  147         void *v;
  148 {
  149         struct inpcbtable *table = v;
  150         struct in6pcb *in6p;
  151         int s;
  152 #if defined(IPSEC) || defined(FAST_IPSEC)
  153         int error;
  154 #endif
  155 
  156         s = splnet();
  157         in6p = pool_get(&in6pcb_pool, PR_NOWAIT);
  158         splx(s);
  159         if (in6p == NULL)
  160                 return (ENOBUFS);
  161         bzero((caddr_t)in6p, sizeof(*in6p));
  162         in6p->in6p_af = AF_INET6;
  163         in6p->in6p_table = table;
  164         in6p->in6p_socket = so;
  165         in6p->in6p_hops = -1;   /* use kernel default */
  166         in6p->in6p_icmp6filt = NULL;
  167 #if defined(IPSEC) || defined(FAST_IPSEC)
  168         error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp);
  169         if (error != 0) {
  170                 s = splnet();
  171                 pool_put(&in6pcb_pool, in6p);
  172                 splx(s);
  173                 return error;
  174         }
  175 #endif /* IPSEC */
  176         s = splnet();
  177         CIRCLEQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p,
  178             inph_queue);
  179         LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
  180             &in6p->in6p_head, inph_lhash);
  181         in6_pcbstate(in6p, IN6P_ATTACHED);
  182         splx(s);
  183         if (ip6_v6only)
  184                 in6p->in6p_flags |= IN6P_IPV6_V6ONLY;
  185         so->so_pcb = (caddr_t)in6p;
  186         return (0);
  187 }
  188 
  189 int
  190 in6_pcbbind(v, nam, l)
  191         void *v;
  192         struct mbuf *nam;
  193         struct lwp *l;
  194 {
  195         struct in6pcb *in6p = v;
  196         struct socket *so = in6p->in6p_socket;
  197         struct inpcbtable *table = in6p->in6p_table;
  198         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
  199         u_int16_t lport = 0;
  200         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
  201 
  202         if (in6p->in6p_af != AF_INET6)
  203                 return (EINVAL);
  204 
  205         if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
  206                 return (EINVAL);
  207         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 &&
  208            ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
  209             (so->so_options & SO_ACCEPTCONN) == 0))
  210                 wild = 1;
  211         if (nam) {
  212                 int error;
  213 
  214                 sin6 = mtod(nam, struct sockaddr_in6 *);
  215                 if (nam->m_len != sizeof(*sin6))
  216                         return (EINVAL);
  217                 /*
  218                  * We should check the family, but old programs
  219                  * incorrectly fail to intialize it.
  220                  */
  221                 if (sin6->sin6_family != AF_INET6)
  222                         return (EAFNOSUPPORT);
  223 
  224 #ifndef INET
  225                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
  226                         return (EADDRNOTAVAIL);
  227 #endif
  228 
  229                 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
  230                         return (error);
  231 
  232                 lport = sin6->sin6_port;
  233                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
  234                         /*
  235                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
  236                          * allow compepte duplication of binding if
  237                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
  238                          * and a multicast address is bound on both
  239                          * new and duplicated sockets.
  240                          */
  241                         if (so->so_options & SO_REUSEADDR)
  242                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
  243                 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  244                         if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  245                                 return (EINVAL);
  246                         if (sin6->sin6_addr.s6_addr32[3]) {
  247                                 struct sockaddr_in sin;
  248 
  249                                 bzero(&sin, sizeof(sin));
  250                                 sin.sin_len = sizeof(sin);
  251                                 sin.sin_family = AF_INET;
  252                                 bcopy(&sin6->sin6_addr.s6_addr32[3],
  253                                     &sin.sin_addr, sizeof(sin.sin_addr));
  254                                 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0)
  255                                         return EADDRNOTAVAIL;
  256                         }
  257                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
  258                         struct ifaddr *ia = NULL;
  259 
  260                         sin6->sin6_port = 0;            /* yech... */
  261                         if ((in6p->in6p_flags & IN6P_FAITH) == 0 &&
  262                             (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
  263                                 return (EADDRNOTAVAIL);
  264 
  265                         /*
  266                          * bind to an anycast address might accidentally
  267                          * cause sending a packet with an anycast source
  268                          * address, so we forbid it.
  269                          *
  270                          * We should allow to bind to a deprecated address,
  271                          * since the application dare to use it.
  272                          * But, can we assume that they are careful enough
  273                          * to check if the address is deprecated or not?
  274                          * Maybe, as a safeguard, we should have a setsockopt
  275                          * flag to control the bind(2) behavior against
  276                          * deprecated addresses (default: forbid bind(2)).
  277                          */
  278                         if (ia &&
  279                             ((struct in6_ifaddr *)ia)->ia6_flags &
  280                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED))
  281                                 return (EADDRNOTAVAIL);
  282                 }
  283                 if (lport) {
  284 #ifndef IPNOPRIVPORTS
  285                         int priv;
  286 
  287                         /*
  288                          * NOTE: all operating systems use suser() for
  289                          * privilege check!  do not rewrite it into SS_PRIV.
  290                          */
  291                         priv = (l && !kauth_authorize_generic(l->l_cred,
  292                             KAUTH_GENERIC_ISSUSER, &l->l_acflag)) ? 1 : 0;
  293                         /* GROSS */
  294                         if (ntohs(lport) < IPV6PORT_RESERVED && !priv)
  295                                 return (EACCES);
  296 #endif
  297 
  298                         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  299 #ifdef INET
  300                                 struct inpcb *t;
  301 
  302                                 t = in_pcblookup_port(table,
  303                                     *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3],
  304                                     lport, wild);
  305                                 if (t && (reuseport & t->inp_socket->so_options) == 0)
  306                                         return (EADDRINUSE);
  307 #else
  308                                 return (EADDRNOTAVAIL);
  309 #endif
  310                         }
  311 
  312                         {
  313                                 struct in6pcb *t;
  314 
  315                                 t = in6_pcblookup_port(table, &sin6->sin6_addr,
  316                                     lport, wild);
  317                                 if (t && (reuseport & t->in6p_socket->so_options) == 0)
  318                                         return (EADDRINUSE);
  319                         }
  320                 }
  321                 in6p->in6p_laddr = sin6->sin6_addr;
  322         }
  323 
  324         if (lport == 0) {
  325                 int e;
  326                 e = in6_pcbsetport(&in6p->in6p_laddr, in6p, l);
  327                 if (e != 0)
  328                         return (e);
  329         } else {
  330                 in6p->in6p_lport = lport;
  331                 in6_pcbstate(in6p, IN6P_BOUND);
  332         }
  333 
  334         LIST_REMOVE(&in6p->in6p_head, inph_lhash);
  335         LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
  336             &in6p->in6p_head, inph_lhash);
  337 
  338 #if 0
  339         in6p->in6p_flowinfo = 0;        /* XXX */
  340 #endif
  341         return (0);
  342 }
  343 
  344 /*
  345  * Connect from a socket to a specified address.
  346  * Both address and port must be specified in argument sin6.
  347  * If don't have a local address for this socket yet,
  348  * then pick one.
  349  */
  350 int
  351 in6_pcbconnect(v, nam, l)
  352         void *v;
  353         struct mbuf *nam;
  354         struct lwp *l;
  355 {
  356         struct in6pcb *in6p = v;
  357         struct in6_addr *in6a = NULL;
  358         struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *);
  359         struct ifnet *ifp = NULL;       /* outgoing interface */
  360         int error = 0;
  361         int scope_ambiguous = 0;
  362 #ifdef INET
  363         struct in6_addr mapped;
  364 #endif
  365         struct sockaddr_in6 tmp;
  366 
  367         (void)&in6a;                            /* XXX fool gcc */
  368 
  369         if (in6p->in6p_af != AF_INET6)
  370                 return (EINVAL);
  371 
  372         if (nam->m_len != sizeof(*sin6))
  373                 return (EINVAL);
  374         if (sin6->sin6_family != AF_INET6)
  375                 return (EAFNOSUPPORT);
  376         if (sin6->sin6_port == 0)
  377                 return (EADDRNOTAVAIL);
  378 
  379         if (sin6->sin6_scope_id == 0 && !ip6_use_defzone)
  380                 scope_ambiguous = 1;
  381         if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
  382                 return(error);
  383 
  384         /* sanity check for mapped address case */
  385         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  386                 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  387                         return EINVAL;
  388                 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
  389                         in6p->in6p_laddr.s6_addr16[5] = htons(0xffff);
  390                 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
  391                         return EINVAL;
  392         } else
  393         {
  394                 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
  395                         return EINVAL;
  396         }
  397 
  398         /* protect *sin6 from overwrites */
  399         tmp = *sin6;
  400         sin6 = &tmp;
  401 
  402         /* Source address selection. */
  403         if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
  404             in6p->in6p_laddr.s6_addr32[3] == 0) {
  405 #ifdef INET
  406                 struct sockaddr_in sin, *sinp;
  407 
  408                 bzero(&sin, sizeof(sin));
  409                 sin.sin_len = sizeof(sin);
  410                 sin.sin_family = AF_INET;
  411                 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr,
  412                         sizeof(sin.sin_addr));
  413                 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route,
  414                         in6p->in6p_socket->so_options, NULL, &error);
  415                 if (sinp == 0) {
  416                         if (error == 0)
  417                                 error = EADDRNOTAVAIL;
  418                         return (error);
  419                 }
  420                 bzero(&mapped, sizeof(mapped));
  421                 mapped.s6_addr16[5] = htons(0xffff);
  422                 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr));
  423                 in6a = &mapped;
  424 #else
  425                 return EADDRNOTAVAIL;
  426 #endif
  427         } else {
  428                 /*
  429                  * XXX: in6_selectsrc might replace the bound local address
  430                  * with the address specified by setsockopt(IPV6_PKTINFO).
  431                  * Is it the intended behavior?
  432                  */
  433                 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts,
  434                                      in6p->in6p_moptions,
  435                                      &in6p->in6p_route,
  436                                      &in6p->in6p_laddr, &ifp, &error);
  437                 if (ifp && scope_ambiguous &&
  438                     (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
  439                         return(error);
  440                 }
  441 
  442                 if (in6a == 0) {
  443                         if (error == 0)
  444                                 error = EADDRNOTAVAIL;
  445                         return (error);
  446                 }
  447         }
  448         if (ifp == NULL && in6p->in6p_route.ro_rt)
  449                 ifp = in6p->in6p_route.ro_rt->rt_ifp;
  450 
  451         in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp);
  452 
  453         if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr,
  454             sin6->sin6_port,
  455             IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr,
  456             in6p->in6p_lport, 0))
  457                 return (EADDRINUSE);
  458         if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ||
  459             (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
  460              in6p->in6p_laddr.s6_addr32[3] == 0))
  461         {
  462                 if (in6p->in6p_lport == 0) {
  463                         error = in6_pcbbind(in6p, (struct mbuf *)0, l);
  464                         if (error != 0)
  465                                 return error;
  466                 }
  467                 in6p->in6p_laddr = *in6a;
  468         }
  469         in6p->in6p_faddr = sin6->sin6_addr;
  470         in6p->in6p_fport = sin6->sin6_port;
  471         in6_pcbstate(in6p, IN6P_CONNECTED);
  472         in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
  473         if (ip6_auto_flowlabel)
  474                 in6p->in6p_flowinfo |=
  475                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
  476 #if defined(IPSEC) || defined(FAST_IPSEC)
  477         if (in6p->in6p_socket->so_type == SOCK_STREAM)
  478                 ipsec_pcbconn(in6p->in6p_sp);
  479 #endif
  480         return (0);
  481 }
  482 
  483 void
  484 in6_pcbdisconnect(in6p)
  485         struct in6pcb *in6p;
  486 {
  487         bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr));
  488         in6p->in6p_fport = 0;
  489         in6_pcbstate(in6p, IN6P_BOUND);
  490         in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
  491 #if defined(IPSEC) || defined(FAST_IPSEC)
  492         ipsec_pcbdisconn(in6p->in6p_sp);
  493 #endif
  494         if (in6p->in6p_socket->so_state & SS_NOFDREF)
  495                 in6_pcbdetach(in6p);
  496 }
  497 
  498 void
  499 in6_pcbdetach(in6p)
  500         struct in6pcb *in6p;
  501 {
  502         struct socket *so = in6p->in6p_socket;
  503         int s;
  504 
  505         if (in6p->in6p_af != AF_INET6)
  506                 return;
  507 
  508 #if defined(IPSEC) || defined(FAST_IPSEC)
  509         ipsec6_delete_pcbpolicy(in6p);
  510 #endif /* IPSEC */
  511         so->so_pcb = 0;
  512         sofree(so);
  513         if (in6p->in6p_options)
  514                 m_freem(in6p->in6p_options);
  515         if (in6p->in6p_outputopts) {
  516                 if (in6p->in6p_outputopts->ip6po_rthdr &&
  517                     in6p->in6p_outputopts->ip6po_route.ro_rt)
  518                         RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt);
  519                 if (in6p->in6p_outputopts->ip6po_m)
  520                         (void)m_free(in6p->in6p_outputopts->ip6po_m);
  521                 free(in6p->in6p_outputopts, M_IP6OPT);
  522         }
  523         if (in6p->in6p_route.ro_rt)
  524                 rtfree(in6p->in6p_route.ro_rt);
  525         ip6_freemoptions(in6p->in6p_moptions);
  526         s = splnet();
  527         in6_pcbstate(in6p, IN6P_ATTACHED);
  528         LIST_REMOVE(&in6p->in6p_head, inph_lhash);
  529         CIRCLEQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head,
  530             inph_queue);
  531         pool_put(&in6pcb_pool, in6p);
  532         splx(s);
  533 }
  534 
  535 void
  536 in6_setsockaddr(in6p, nam)
  537         struct in6pcb *in6p;
  538         struct mbuf *nam;
  539 {
  540         struct sockaddr_in6 *sin6;
  541 
  542         if (in6p->in6p_af != AF_INET6)
  543                 return;
  544 
  545         nam->m_len = sizeof(*sin6);
  546         sin6 = mtod(nam, struct sockaddr_in6 *);
  547         bzero((caddr_t)sin6, sizeof(*sin6));
  548         sin6->sin6_family = AF_INET6;
  549         sin6->sin6_len = sizeof(struct sockaddr_in6);
  550         sin6->sin6_port = in6p->in6p_lport;
  551         sin6->sin6_addr = in6p->in6p_laddr;
  552         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
  553 }
  554 
  555 void
  556 in6_setpeeraddr(in6p, nam)
  557         struct in6pcb *in6p;
  558         struct mbuf *nam;
  559 {
  560         struct sockaddr_in6 *sin6;
  561 
  562         if (in6p->in6p_af != AF_INET6)
  563                 return;
  564 
  565         nam->m_len = sizeof(*sin6);
  566         sin6 = mtod(nam, struct sockaddr_in6 *);
  567         bzero((caddr_t)sin6, sizeof(*sin6));
  568         sin6->sin6_family = AF_INET6;
  569         sin6->sin6_len = sizeof(struct sockaddr_in6);
  570         sin6->sin6_port = in6p->in6p_fport;
  571         sin6->sin6_addr = in6p->in6p_faddr;
  572         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
  573 }
  574 
  575 /*
  576  * Pass some notification to all connections of a protocol
  577  * associated with address dst.  The local address and/or port numbers
  578  * may be specified to limit the search.  The "usual action" will be
  579  * taken, depending on the ctlinput cmd.  The caller must filter any
  580  * cmds that are uninteresting (e.g., no error in the map).
  581  * Call the protocol specific routine (if any) to report
  582  * any errors for each matching socket.
  583  *
  584  * Must be called at splsoftnet.
  585  *
  586  * Note: src (4th arg) carries the flowlabel value on the original IPv6
  587  * header, in sin6_flowinfo member.
  588  */
  589 int
  590 in6_pcbnotify(table, dst, fport_arg, src, lport_arg, cmd, cmdarg, notify)
  591         struct inpcbtable *table;
  592         struct sockaddr *dst;
  593         const struct sockaddr *src;
  594         u_int fport_arg, lport_arg;
  595         int cmd;
  596         void *cmdarg;
  597         void (*notify) __P((struct in6pcb *, int));
  598 {
  599         struct in6pcb *in6p, *nin6p;
  600         struct sockaddr_in6 sa6_src, *sa6_dst;
  601         u_int16_t fport = fport_arg, lport = lport_arg;
  602         int errno;
  603         int nmatch = 0;
  604         u_int32_t flowinfo;
  605 
  606         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
  607                 return 0;
  608 
  609         sa6_dst = (struct sockaddr_in6 *)dst;
  610         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
  611                 return 0;
  612 
  613         /*
  614          * note that src can be NULL when we get notify by local fragmentation.
  615          */
  616         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
  617         flowinfo = sa6_src.sin6_flowinfo;
  618 
  619         /*
  620          * Redirects go to all references to the destination,
  621          * and use in6_rtchange to invalidate the route cache.
  622          * Dead host indications: also use in6_rtchange to invalidate
  623          * the cache, and deliver the error to all the sockets.
  624          * Otherwise, if we have knowledge of the local port and address,
  625          * deliver only to that socket.
  626          */
  627         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
  628                 fport = 0;
  629                 lport = 0;
  630                 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
  631 
  632                 if (cmd != PRC_HOSTDEAD)
  633                         notify = in6_rtchange;
  634         }
  635 
  636         errno = inet6ctlerrmap[cmd];
  637         for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
  638             in6p != (void *)&table->inpt_queue;
  639             in6p = nin6p) {
  640                 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
  641 
  642                 if (in6p->in6p_af != AF_INET6)
  643                         continue;
  644 
  645                 /*
  646                  * Under the following condition, notify of redirects
  647                  * to the pcb, without making address matches against inpcb.
  648                  * - redirect notification is arrived.
  649                  * - the inpcb is unconnected.
  650                  * - the inpcb is caching !RTF_HOST routing entry.
  651                  * - the ICMPv6 notification is from the gateway cached in the
  652                  *   inpcb.  i.e. ICMPv6 notification is from nexthop gateway
  653                  *   the inpcb used very recently.
  654                  *
  655                  * This is to improve interaction between netbsd/openbsd
  656                  * redirect handling code, and inpcb route cache code.
  657                  * without the clause, !RTF_HOST routing entry (which carries
  658                  * gateway used by inpcb right before the ICMPv6 redirect)
  659                  * will be cached forever in unconnected inpcb.
  660                  *
  661                  * There still is a question regarding to what is TRT:
  662                  * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be
  663                  *   generated on packet output.  inpcb will always cache
  664                  *   RTF_HOST routing entry so there's no need for the clause
  665                  *   (ICMPv6 redirect will update RTF_HOST routing entry,
  666                  *   and inpcb is caching it already).
  667                  *   However, bsdi/freebsd are vulnerable to local DoS attacks
  668                  *   due to the cloned routing entries.
  669                  * - Specwise, "destination cache" is mentioned in RFC2461.
  670                  *   Jinmei says that it implies bsdi/freebsd behavior, itojun
  671                  *   is not really convinced.
  672                  * - Having hiwat/lowat on # of cloned host route (redirect/
  673                  *   pmtud) may be a good idea.  netbsd/openbsd has it.  see
  674                  *   icmp6_mtudisc_update().
  675                  */
  676                 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) &&
  677                     IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
  678                     in6p->in6p_route.ro_rt &&
  679                     !(in6p->in6p_route.ro_rt->rt_flags & RTF_HOST)) {
  680                         struct sockaddr_in6 *dst6;
  681 
  682                         dst6 = (struct sockaddr_in6 *)&in6p->in6p_route.ro_dst;
  683                         if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr,
  684                             &sa6_dst->sin6_addr))
  685                                 goto do_notify;
  686                 }
  687 
  688                 /*
  689                  * If the error designates a new path MTU for a destination
  690                  * and the application (associated with this socket) wanted to
  691                  * know the value, notify. Note that we notify for all
  692                  * disconnected sockets if the corresponding application
  693                  * wanted. This is because some UDP applications keep sending
  694                  * sockets disconnected.
  695                  * XXX: should we avoid to notify the value to TCP sockets?
  696                  */
  697                 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 &&
  698                     (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) ||
  699                      IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) {
  700                         ip6_notify_pmtu(in6p, (struct sockaddr_in6 *)dst,
  701                                         (u_int32_t *)cmdarg);
  702                 }
  703 
  704                 /*
  705                  * Detect if we should notify the error. If no source and
  706                  * destination ports are specified, but non-zero flowinfo and
  707                  * local address match, notify the error. This is the case
  708                  * when the error is delivered with an encrypted buffer
  709                  * by ESP. Otherwise, just compare addresses and ports
  710                  * as usual.
  711                  */
  712                 if (lport == 0 && fport == 0 && flowinfo &&
  713                     in6p->in6p_socket != NULL &&
  714                     flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
  715                     IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr))
  716                         goto do_notify;
  717                 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
  718                                              &sa6_dst->sin6_addr) ||
  719                     in6p->in6p_socket == 0 ||
  720                     (lport && in6p->in6p_lport != lport) ||
  721                     (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
  722                      !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
  723                                          &sa6_src.sin6_addr)) ||
  724                     (fport && in6p->in6p_fport != fport))
  725                         continue;
  726 
  727           do_notify:
  728                 if (notify)
  729                         (*notify)(in6p, errno);
  730                 nmatch++;
  731         }
  732         return nmatch;
  733 }
  734 
  735 void
  736 in6_pcbpurgeif0(table, ifp)
  737         struct inpcbtable *table;
  738         struct ifnet *ifp;
  739 {
  740         struct in6pcb *in6p, *nin6p;
  741         struct ip6_moptions *im6o;
  742         struct in6_multi_mship *imm, *nimm;
  743 
  744         for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
  745             in6p != (void *)&table->inpt_queue;
  746             in6p = nin6p) {
  747                 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
  748                 if (in6p->in6p_af != AF_INET6)
  749                         continue;
  750 
  751                 im6o = in6p->in6p_moptions;
  752                 if (im6o) {
  753                         /*
  754                          * Unselect the outgoing interface if it is being
  755                          * detached.
  756                          */
  757                         if (im6o->im6o_multicast_ifp == ifp)
  758                                 im6o->im6o_multicast_ifp = NULL;
  759 
  760                         /*
  761                          * Drop multicast group membership if we joined
  762                          * through the interface being detached.
  763                          * XXX controversial - is it really legal for kernel
  764                          * to force this?
  765                          */
  766                         for (imm = im6o->im6o_memberships.lh_first;
  767                              imm != NULL; imm = nimm) {
  768                                 nimm = imm->i6mm_chain.le_next;
  769                                 if (imm->i6mm_maddr->in6m_ifp == ifp) {
  770                                         LIST_REMOVE(imm, i6mm_chain);
  771                                         in6_leavegroup(imm);
  772                                 }
  773                         }
  774                 }
  775         }
  776 }
  777 
  778 void
  779 in6_pcbpurgeif(table, ifp)
  780         struct inpcbtable *table;
  781         struct ifnet *ifp;
  782 {
  783         struct in6pcb *in6p, *nin6p;
  784 
  785         for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
  786             in6p != (void *)&table->inpt_queue;
  787             in6p = nin6p) {
  788                 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
  789                 if (in6p->in6p_af != AF_INET6)
  790                         continue;
  791                 if (in6p->in6p_route.ro_rt != NULL &&
  792                     in6p->in6p_route.ro_rt->rt_ifp == ifp)
  793                         in6_rtchange(in6p, 0);
  794         }
  795 }
  796 
  797 /*
  798  * Check for alternatives when higher level complains
  799  * about service problems.  For now, invalidate cached
  800  * routing information.  If the route was created dynamically
  801  * (by a redirect), time to try a default gateway again.
  802  */
  803 void
  804 in6_losing(in6p)
  805         struct in6pcb *in6p;
  806 {
  807         struct rtentry *rt;
  808         struct rt_addrinfo info;
  809 
  810         if (in6p->in6p_af != AF_INET6)
  811                 return;
  812 
  813         if ((rt = in6p->in6p_route.ro_rt) != NULL) {
  814                 in6p->in6p_route.ro_rt = 0;
  815                 bzero((caddr_t)&info, sizeof(info));
  816                 info.rti_info[RTAX_DST] =
  817                         (struct sockaddr *)&in6p->in6p_route.ro_dst;
  818                 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
  819                 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
  820                 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
  821                 if (rt->rt_flags & RTF_DYNAMIC) {
  822                         (void)rtrequest(RTM_DELETE, rt_key(rt),
  823                                         rt->rt_gateway, rt_mask(rt), rt->rt_flags,
  824                                         (struct rtentry **)0);
  825                 } else {
  826                         /*
  827                          * A new route can be allocated
  828                          * the next time output is attempted.
  829                          */
  830                         rtfree(rt);
  831                 }
  832         }
  833 }
  834 
  835 /*
  836  * After a routing change, flush old routing
  837  * and allocate a (hopefully) better one.
  838  */
  839 void
  840 in6_rtchange(struct in6pcb *in6p, int errno)
  841 {
  842         if (in6p->in6p_af != AF_INET6)
  843                 return;
  844 
  845         if (in6p->in6p_route.ro_rt) {
  846                 rtfree(in6p->in6p_route.ro_rt);
  847                 in6p->in6p_route.ro_rt = 0;
  848                 /*
  849                  * A new route can be allocated the next time
  850                  * output is attempted.
  851                  */
  852         }
  853 }
  854 
  855 struct in6pcb *
  856 in6_pcblookup_port(table, laddr6, lport_arg, lookup_wildcard)
  857         struct inpcbtable *table;
  858         struct in6_addr *laddr6;
  859         u_int lport_arg;
  860         int lookup_wildcard;
  861 {
  862         struct inpcbhead *head;
  863         struct inpcb_hdr *inph;
  864         struct in6pcb *in6p, *match = 0;
  865         int matchwild = 3, wildcard;
  866         u_int16_t lport = lport_arg;
  867 
  868         head = IN6PCBHASH_PORT(table, lport);
  869         LIST_FOREACH(inph, head, inph_lhash) {
  870                 in6p = (struct in6pcb *)inph;
  871                 if (in6p->in6p_af != AF_INET6)
  872                         continue;
  873 
  874                 if (in6p->in6p_lport != lport)
  875                         continue;
  876                 wildcard = 0;
  877                 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
  878                         if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  879                                 continue;
  880                 }
  881                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
  882                         wildcard++;
  883                 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) {
  884                         if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  885                                 continue;
  886                         if (!IN6_IS_ADDR_V4MAPPED(laddr6))
  887                                 continue;
  888 
  889                         /* duplicate of IPv4 logic */
  890                         wildcard = 0;
  891                         if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) &&
  892                             in6p->in6p_faddr.s6_addr32[3])
  893                                 wildcard++;
  894                         if (!in6p->in6p_laddr.s6_addr32[3]) {
  895                                 if (laddr6->s6_addr32[3])
  896                                         wildcard++;
  897                         } else {
  898                                 if (!laddr6->s6_addr32[3])
  899                                         wildcard++;
  900                                 else {
  901                                         if (in6p->in6p_laddr.s6_addr32[3] !=
  902                                             laddr6->s6_addr32[3])
  903                                                 continue;
  904                                 }
  905                         }
  906                 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
  907                         if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
  908                                 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  909                                         continue;
  910                         }
  911                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
  912                                 wildcard++;
  913                 } else {
  914                         if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
  915                                 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  916                                         continue;
  917                         }
  918                         if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
  919                                 wildcard++;
  920                         else {
  921                                 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
  922                                     laddr6))
  923                                         continue;
  924                         }
  925                 }
  926                 if (wildcard && !lookup_wildcard)
  927                         continue;
  928                 if (wildcard < matchwild) {
  929                         match = in6p;
  930                         matchwild = wildcard;
  931                         if (matchwild == 0)
  932                                 break;
  933                 }
  934         }
  935         return (match);
  936 }
  937 #undef continue
  938 
  939 /*
  940  * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to
  941  * IPv4 mapped address.
  942  */
  943 struct rtentry *
  944 in6_pcbrtentry(in6p)
  945         struct in6pcb *in6p;
  946 {
  947         struct route_in6 *ro;
  948         struct sockaddr_in6 *dst6;
  949 
  950         ro = &in6p->in6p_route;
  951         dst6 = (struct sockaddr_in6 *)&ro->ro_dst;
  952 
  953         if (in6p->in6p_af != AF_INET6)
  954                 return (NULL);
  955 
  956         if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
  957             !IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, &in6p->in6p_faddr))) {
  958                 RTFREE(ro->ro_rt);
  959                 ro->ro_rt = (struct rtentry *)NULL;
  960         }
  961 #ifdef INET
  962         if (ro->ro_rt == (struct rtentry *)NULL &&
  963             IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
  964                 struct sockaddr_in *dst = (struct sockaddr_in *)&ro->ro_dst;
  965 
  966                 bzero(dst, sizeof(*dst));
  967                 dst->sin_family = AF_INET;
  968                 dst->sin_len = sizeof(struct sockaddr_in);
  969                 bcopy(&in6p->in6p_faddr.s6_addr32[3], &dst->sin_addr,
  970                     sizeof(dst->sin_addr));
  971                 rtalloc((struct route *)ro);
  972         } else
  973 #endif
  974         if (ro->ro_rt == (struct rtentry *)NULL &&
  975             !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
  976                 bzero(dst6, sizeof(*dst6));
  977                 dst6->sin6_family = AF_INET6;
  978                 dst6->sin6_len = sizeof(struct sockaddr_in6);
  979                 dst6->sin6_addr = in6p->in6p_faddr;
  980                 rtalloc((struct route *)ro);
  981         }
  982         return (ro->ro_rt);
  983 }
  984 
  985 struct in6pcb *
  986 in6_pcblookup_connect(struct inpcbtable *table, struct in6_addr *faddr6,
  987     u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg,
  988     int faith)
  989 {
  990         struct inpcbhead *head;
  991         struct inpcb_hdr *inph;
  992         struct in6pcb *in6p;
  993         u_int16_t fport = fport_arg, lport = lport_arg;
  994 
  995         head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport);
  996         LIST_FOREACH(inph, head, inph_hash) {
  997                 in6p = (struct in6pcb *)inph;
  998                 if (in6p->in6p_af != AF_INET6)
  999                         continue;
 1000 
 1001                 /* find exact match on both source and dest */
 1002                 if (in6p->in6p_fport != fport)
 1003                         continue;
 1004                 if (in6p->in6p_lport != lport)
 1005                         continue;
 1006                 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
 1007                         continue;
 1008                 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6))
 1009                         continue;
 1010                 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
 1011                         continue;
 1012                 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
 1013                         continue;
 1014                 if ((IN6_IS_ADDR_V4MAPPED(laddr6) ||
 1015                      IN6_IS_ADDR_V4MAPPED(faddr6)) &&
 1016                     (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
 1017                         continue;
 1018                 return in6p;
 1019         }
 1020         return NULL;
 1021 }
 1022 
 1023 struct in6pcb *
 1024 in6_pcblookup_bind(table, laddr6, lport_arg, faith)
 1025         struct inpcbtable *table;
 1026         struct in6_addr *laddr6;
 1027         u_int lport_arg;
 1028         int faith;
 1029 {
 1030         struct inpcbhead *head;
 1031         struct inpcb_hdr *inph;
 1032         struct in6pcb *in6p;
 1033         u_int16_t lport = lport_arg;
 1034 #ifdef INET
 1035         struct in6_addr zero_mapped;
 1036 #endif
 1037 
 1038         head = IN6PCBHASH_BIND(table, laddr6, lport);
 1039         LIST_FOREACH(inph, head, inph_hash) {
 1040                 in6p = (struct in6pcb *)inph;
 1041                 if (in6p->in6p_af != AF_INET6)
 1042                         continue;
 1043 
 1044                 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
 1045                         continue;
 1046                 if (in6p->in6p_fport != 0)
 1047                         continue;
 1048                 if (in6p->in6p_lport != lport)
 1049                         continue;
 1050                 if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
 1051                     (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
 1052                         continue;
 1053                 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
 1054                         goto out;
 1055         }
 1056 #ifdef INET
 1057         if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
 1058                 memset(&zero_mapped, 0, sizeof(zero_mapped));
 1059                 zero_mapped.s6_addr16[5] = 0xffff;
 1060                 head = IN6PCBHASH_BIND(table, &zero_mapped, lport);
 1061                 LIST_FOREACH(inph, head, inph_hash) {
 1062                         in6p = (struct in6pcb *)inph;
 1063                         if (in6p->in6p_af != AF_INET6)
 1064                                 continue;
 1065 
 1066                         if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
 1067                                 continue;
 1068                         if (in6p->in6p_fport != 0)
 1069                                 continue;
 1070                         if (in6p->in6p_lport != lport)
 1071                                 continue;
 1072                         if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
 1073                                 continue;
 1074                         if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped))
 1075                                 goto out;
 1076                 }
 1077         }
 1078 #endif
 1079         head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport);
 1080         LIST_FOREACH(inph, head, inph_hash) {
 1081                 in6p = (struct in6pcb *)inph;
 1082                 if (in6p->in6p_af != AF_INET6)
 1083                         continue;
 1084 
 1085                 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
 1086                         continue;
 1087                 if (in6p->in6p_fport != 0)
 1088                         continue;
 1089                 if (in6p->in6p_lport != lport)
 1090                         continue;
 1091                 if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
 1092                     (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
 1093                         continue;
 1094                 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr))
 1095                         goto out;
 1096         }
 1097         return (NULL);
 1098 
 1099 out:
 1100         inph = &in6p->in6p_head;
 1101         if (inph != LIST_FIRST(head)) {
 1102                 LIST_REMOVE(inph, inph_hash);
 1103                 LIST_INSERT_HEAD(head, inph, inph_hash);
 1104         }
 1105         return in6p;
 1106 }
 1107 
 1108 void
 1109 in6_pcbstate(in6p, state)
 1110         struct in6pcb *in6p;
 1111         int state;
 1112 {
 1113 
 1114         if (in6p->in6p_af != AF_INET6)
 1115                 return;
 1116 
 1117         if (in6p->in6p_state > IN6P_ATTACHED)
 1118                 LIST_REMOVE(&in6p->in6p_head, inph_hash);
 1119 
 1120         switch (state) {
 1121         case IN6P_BOUND:
 1122                 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table,
 1123                     &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
 1124                     inph_hash);
 1125                 break;
 1126         case IN6P_CONNECTED:
 1127                 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table,
 1128                     &in6p->in6p_faddr, in6p->in6p_fport,
 1129                     &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
 1130                     inph_hash);
 1131                 break;
 1132         }
 1133 
 1134         in6p->in6p_state = state;
 1135 }

Cache object: 90ca106f275e75ca1a5d48fb84401eda


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