The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6_pcb.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: in6_pcb.c,v 1.99 2008/08/20 18:35:20 matt 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 1.99 2008/08/20 18:35:20 matt 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 const 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     IPL_SOFTNET);
  134 
  135 void
  136 in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize)
  137 {
  138 
  139         in_pcbinit(table, bindhashsize, connecthashsize);
  140         table->inpt_lastport = (u_int16_t)ip6_anonportmax;
  141 }
  142 
  143 int
  144 in6_pcballoc(struct socket *so, void *v)
  145 {
  146         struct inpcbtable *table = v;
  147         struct in6pcb *in6p;
  148         int s;
  149 #if defined(IPSEC) || defined(FAST_IPSEC)
  150         int error;
  151 #endif
  152 
  153         s = splnet();
  154         in6p = pool_get(&in6pcb_pool, PR_NOWAIT);
  155         splx(s);
  156         if (in6p == NULL)
  157                 return (ENOBUFS);
  158         bzero((void *)in6p, sizeof(*in6p));
  159         in6p->in6p_af = AF_INET6;
  160         in6p->in6p_table = table;
  161         in6p->in6p_socket = so;
  162         in6p->in6p_hops = -1;   /* use kernel default */
  163         in6p->in6p_icmp6filt = NULL;
  164 #if defined(IPSEC) || defined(FAST_IPSEC)
  165         error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp);
  166         if (error != 0) {
  167                 s = splnet();
  168                 pool_put(&in6pcb_pool, in6p);
  169                 splx(s);
  170                 return error;
  171         }
  172 #endif /* IPSEC */
  173         s = splnet();
  174         CIRCLEQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p,
  175             inph_queue);
  176         LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
  177             &in6p->in6p_head, inph_lhash);
  178         in6_pcbstate(in6p, IN6P_ATTACHED);
  179         splx(s);
  180         if (ip6_v6only)
  181                 in6p->in6p_flags |= IN6P_IPV6_V6ONLY;
  182         so->so_pcb = (void *)in6p;
  183         return (0);
  184 }
  185 
  186 int
  187 in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l)
  188 {
  189         struct in6pcb *in6p = v;
  190         struct socket *so = in6p->in6p_socket;
  191         struct inpcbtable *table = in6p->in6p_table;
  192         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
  193         u_int16_t lport = 0;
  194         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
  195 
  196         if (in6p->in6p_af != AF_INET6)
  197                 return (EINVAL);
  198 
  199         if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
  200                 return (EINVAL);
  201         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 &&
  202            ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
  203             (so->so_options & SO_ACCEPTCONN) == 0))
  204                 wild = 1;
  205         if (nam) {
  206                 int error;
  207 
  208                 sin6 = mtod(nam, struct sockaddr_in6 *);
  209                 if (nam->m_len != sizeof(*sin6))
  210                         return (EINVAL);
  211                 /*
  212                  * We should check the family, but old programs
  213                  * incorrectly fail to intialize it.
  214                  */
  215                 if (sin6->sin6_family != AF_INET6)
  216                         return (EAFNOSUPPORT);
  217 
  218 #ifndef INET
  219                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
  220                         return (EADDRNOTAVAIL);
  221 #endif
  222 
  223                 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
  224                         return (error);
  225 
  226                 lport = sin6->sin6_port;
  227                 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
  228                         /*
  229                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
  230                          * allow compepte duplication of binding if
  231                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
  232                          * and a multicast address is bound on both
  233                          * new and duplicated sockets.
  234                          */
  235                         if (so->so_options & SO_REUSEADDR)
  236                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
  237                 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  238                         if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  239                                 return (EINVAL);
  240                         if (sin6->sin6_addr.s6_addr32[3]) {
  241                                 struct sockaddr_in sin;
  242 
  243                                 bzero(&sin, sizeof(sin));
  244                                 sin.sin_len = sizeof(sin);
  245                                 sin.sin_family = AF_INET;
  246                                 bcopy(&sin6->sin6_addr.s6_addr32[3],
  247                                     &sin.sin_addr, sizeof(sin.sin_addr));
  248                                 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0)
  249                                         return EADDRNOTAVAIL;
  250                         }
  251                 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
  252                         struct ifaddr *ia = NULL;
  253 
  254                         sin6->sin6_port = 0;            /* yech... */
  255                         if ((in6p->in6p_flags & IN6P_FAITH) == 0 &&
  256                             (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
  257                                 return (EADDRNOTAVAIL);
  258 
  259                         /*
  260                          * bind to an anycast address might accidentally
  261                          * cause sending a packet with an anycast source
  262                          * address, so we forbid it.
  263                          *
  264                          * We should allow to bind to a deprecated address,
  265                          * since the application dare to use it.
  266                          * But, can we assume that they are careful enough
  267                          * to check if the address is deprecated or not?
  268                          * Maybe, as a safeguard, we should have a setsockopt
  269                          * flag to control the bind(2) behavior against
  270                          * deprecated addresses (default: forbid bind(2)).
  271                          */
  272                         if (ia &&
  273                             ((struct in6_ifaddr *)ia)->ia6_flags &
  274                             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED))
  275                                 return (EADDRNOTAVAIL);
  276                 }
  277                 if (lport) {
  278 #ifndef IPNOPRIVPORTS
  279                         int priv;
  280 
  281                         /*
  282                          * NOTE: all operating systems use suser() for
  283                          * privilege check!  do not rewrite it into SS_PRIV.
  284                          */
  285                         priv = (l && !kauth_authorize_generic(l->l_cred,
  286                             KAUTH_GENERIC_ISSUSER, NULL)) ? 1 : 0;
  287                         /* GROSS */
  288                         if (ntohs(lport) < IPV6PORT_RESERVED && !priv)
  289                                 return (EACCES);
  290 #endif
  291 
  292                         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  293 #ifdef INET
  294                                 struct inpcb *t;
  295 
  296                                 t = in_pcblookup_port(table,
  297                                     *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3],
  298                                     lport, wild);
  299                                 if (t && (reuseport & t->inp_socket->so_options) == 0)
  300                                         return (EADDRINUSE);
  301 #else
  302                                 return (EADDRNOTAVAIL);
  303 #endif
  304                         }
  305 
  306                         {
  307                                 struct in6pcb *t;
  308 
  309                                 t = in6_pcblookup_port(table, &sin6->sin6_addr,
  310                                     lport, wild);
  311                                 if (t && (reuseport & t->in6p_socket->so_options) == 0)
  312                                         return (EADDRINUSE);
  313                         }
  314                 }
  315                 in6p->in6p_laddr = sin6->sin6_addr;
  316         }
  317 
  318         if (lport == 0) {
  319                 int e;
  320                 e = in6_pcbsetport(&in6p->in6p_laddr, in6p, l);
  321                 if (e != 0)
  322                         return (e);
  323         } else {
  324                 in6p->in6p_lport = lport;
  325                 in6_pcbstate(in6p, IN6P_BOUND);
  326         }
  327 
  328         LIST_REMOVE(&in6p->in6p_head, inph_lhash);
  329         LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
  330             &in6p->in6p_head, inph_lhash);
  331 
  332 #if 0
  333         in6p->in6p_flowinfo = 0;        /* XXX */
  334 #endif
  335         return (0);
  336 }
  337 
  338 /*
  339  * Connect from a socket to a specified address.
  340  * Both address and port must be specified in argument sin6.
  341  * If don't have a local address for this socket yet,
  342  * then pick one.
  343  */
  344 int
  345 in6_pcbconnect(void *v, struct mbuf *nam, struct lwp *l)
  346 {
  347         struct rtentry *rt;
  348         struct in6pcb *in6p = v;
  349         struct in6_addr *in6a = NULL;
  350         struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *);
  351         struct ifnet *ifp = NULL;       /* outgoing interface */
  352         int error = 0;
  353         int scope_ambiguous = 0;
  354 #ifdef INET
  355         struct in6_addr mapped;
  356 #endif
  357         struct sockaddr_in6 tmp;
  358 
  359         (void)&in6a;                            /* XXX fool gcc */
  360 
  361         if (in6p->in6p_af != AF_INET6)
  362                 return (EINVAL);
  363 
  364         if (nam->m_len != sizeof(*sin6))
  365                 return (EINVAL);
  366         if (sin6->sin6_family != AF_INET6)
  367                 return (EAFNOSUPPORT);
  368         if (sin6->sin6_port == 0)
  369                 return (EADDRNOTAVAIL);
  370 
  371         if (sin6->sin6_scope_id == 0 && !ip6_use_defzone)
  372                 scope_ambiguous = 1;
  373         if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
  374                 return(error);
  375 
  376         /* sanity check for mapped address case */
  377         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  378                 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  379                         return EINVAL;
  380                 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
  381                         in6p->in6p_laddr.s6_addr16[5] = htons(0xffff);
  382                 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
  383                         return EINVAL;
  384         } else
  385         {
  386                 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
  387                         return EINVAL;
  388         }
  389 
  390         /* protect *sin6 from overwrites */
  391         tmp = *sin6;
  392         sin6 = &tmp;
  393 
  394         /* Source address selection. */
  395         if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
  396             in6p->in6p_laddr.s6_addr32[3] == 0) {
  397 #ifdef INET
  398                 struct sockaddr_in sin, *sinp;
  399 
  400                 bzero(&sin, sizeof(sin));
  401                 sin.sin_len = sizeof(sin);
  402                 sin.sin_family = AF_INET;
  403                 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr,
  404                         sizeof(sin.sin_addr));
  405                 sinp = in_selectsrc(&sin, &in6p->in6p_route,
  406                         in6p->in6p_socket->so_options, NULL, &error);
  407                 if (sinp == 0) {
  408                         if (error == 0)
  409                                 error = EADDRNOTAVAIL;
  410                         return (error);
  411                 }
  412                 bzero(&mapped, sizeof(mapped));
  413                 mapped.s6_addr16[5] = htons(0xffff);
  414                 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr));
  415                 in6a = &mapped;
  416 #else
  417                 return EADDRNOTAVAIL;
  418 #endif
  419         } else {
  420                 /*
  421                  * XXX: in6_selectsrc might replace the bound local address
  422                  * with the address specified by setsockopt(IPV6_PKTINFO).
  423                  * Is it the intended behavior?
  424                  */
  425                 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts,
  426                                      in6p->in6p_moptions,
  427                                      &in6p->in6p_route,
  428                                      &in6p->in6p_laddr, &ifp, &error);
  429                 if (ifp && scope_ambiguous &&
  430                     (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
  431                         return(error);
  432                 }
  433 
  434                 if (in6a == 0) {
  435                         if (error == 0)
  436                                 error = EADDRNOTAVAIL;
  437                         return (error);
  438                 }
  439         }
  440         if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL)
  441                 ifp = rt->rt_ifp;
  442 
  443         in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp);
  444 
  445         if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr,
  446             sin6->sin6_port,
  447             IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr,
  448             in6p->in6p_lport, 0))
  449                 return (EADDRINUSE);
  450         if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ||
  451             (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
  452              in6p->in6p_laddr.s6_addr32[3] == 0))
  453         {
  454                 if (in6p->in6p_lport == 0) {
  455                         error = in6_pcbbind(in6p, (struct mbuf *)0, l);
  456                         if (error != 0)
  457                                 return error;
  458                 }
  459                 in6p->in6p_laddr = *in6a;
  460         }
  461         in6p->in6p_faddr = sin6->sin6_addr;
  462         in6p->in6p_fport = sin6->sin6_port;
  463         in6_pcbstate(in6p, IN6P_CONNECTED);
  464         in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
  465         if (ip6_auto_flowlabel)
  466                 in6p->in6p_flowinfo |=
  467                     (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
  468 #if defined(IPSEC) || defined(FAST_IPSEC)
  469         if (in6p->in6p_socket->so_type == SOCK_STREAM)
  470                 ipsec_pcbconn(in6p->in6p_sp);
  471 #endif
  472         return (0);
  473 }
  474 
  475 void
  476 in6_pcbdisconnect(struct in6pcb *in6p)
  477 {
  478         bzero((void *)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr));
  479         in6p->in6p_fport = 0;
  480         in6_pcbstate(in6p, IN6P_BOUND);
  481         in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
  482 #if defined(IPSEC) || defined(FAST_IPSEC)
  483         ipsec_pcbdisconn(in6p->in6p_sp);
  484 #endif
  485         if (in6p->in6p_socket->so_state & SS_NOFDREF)
  486                 in6_pcbdetach(in6p);
  487 }
  488 
  489 void
  490 in6_pcbdetach(struct in6pcb *in6p)
  491 {
  492         struct socket *so = in6p->in6p_socket;
  493         int s;
  494 
  495         if (in6p->in6p_af != AF_INET6)
  496                 return;
  497 
  498 #if defined(IPSEC) || defined(FAST_IPSEC)
  499         ipsec6_delete_pcbpolicy(in6p);
  500 #endif /* IPSEC */
  501         so->so_pcb = 0;
  502         if (in6p->in6p_options)
  503                 m_freem(in6p->in6p_options);
  504         if (in6p->in6p_outputopts != NULL) {
  505                 ip6_clearpktopts(in6p->in6p_outputopts, -1);
  506                 free(in6p->in6p_outputopts, M_IP6OPT);
  507         }
  508         rtcache_free(&in6p->in6p_route);
  509         ip6_freemoptions(in6p->in6p_moptions);
  510         s = splnet();
  511         in6_pcbstate(in6p, IN6P_ATTACHED);
  512         LIST_REMOVE(&in6p->in6p_head, inph_lhash);
  513         CIRCLEQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head,
  514             inph_queue);
  515         pool_put(&in6pcb_pool, in6p);
  516         splx(s);
  517         sofree(so);                             /* drops the socket's lock */
  518         mutex_enter(softnet_lock);              /* reacquire it */
  519 }
  520 
  521 void
  522 in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam)
  523 {
  524         struct sockaddr_in6 *sin6;
  525 
  526         if (in6p->in6p_af != AF_INET6)
  527                 return;
  528 
  529         nam->m_len = sizeof(*sin6);
  530         sin6 = mtod(nam, struct sockaddr_in6 *);
  531         sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0);
  532         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
  533 }
  534 
  535 void
  536 in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam)
  537 {
  538         struct sockaddr_in6 *sin6;
  539 
  540         if (in6p->in6p_af != AF_INET6)
  541                 return;
  542 
  543         nam->m_len = sizeof(*sin6);
  544         sin6 = mtod(nam, struct sockaddr_in6 *);
  545         sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0);
  546         (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
  547 }
  548 
  549 /*
  550  * Pass some notification to all connections of a protocol
  551  * associated with address dst.  The local address and/or port numbers
  552  * may be specified to limit the search.  The "usual action" will be
  553  * taken, depending on the ctlinput cmd.  The caller must filter any
  554  * cmds that are uninteresting (e.g., no error in the map).
  555  * Call the protocol specific routine (if any) to report
  556  * any errors for each matching socket.
  557  *
  558  * Must be called at splsoftnet.
  559  *
  560  * Note: src (4th arg) carries the flowlabel value on the original IPv6
  561  * header, in sin6_flowinfo member.
  562  */
  563 int
  564 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst,
  565     u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd,
  566     void *cmdarg, void (*notify)(struct in6pcb *, int))
  567 {
  568         struct rtentry *rt;
  569         struct in6pcb *in6p, *nin6p;
  570         struct sockaddr_in6 sa6_src;
  571         const struct sockaddr_in6 *sa6_dst;
  572         u_int16_t fport = fport_arg, lport = lport_arg;
  573         int errno;
  574         int nmatch = 0;
  575         u_int32_t flowinfo;
  576 
  577         if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
  578                 return 0;
  579 
  580         sa6_dst = (const struct sockaddr_in6 *)dst;
  581         if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
  582                 return 0;
  583 
  584         /*
  585          * note that src can be NULL when we get notify by local fragmentation.
  586          */
  587         sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
  588         flowinfo = sa6_src.sin6_flowinfo;
  589 
  590         /*
  591          * Redirects go to all references to the destination,
  592          * and use in6_rtchange to invalidate the route cache.
  593          * Dead host indications: also use in6_rtchange to invalidate
  594          * the cache, and deliver the error to all the sockets.
  595          * Otherwise, if we have knowledge of the local port and address,
  596          * deliver only to that socket.
  597          */
  598         if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
  599                 fport = 0;
  600                 lport = 0;
  601                 bzero((void *)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
  602 
  603                 if (cmd != PRC_HOSTDEAD)
  604                         notify = in6_rtchange;
  605         }
  606 
  607         errno = inet6ctlerrmap[cmd];
  608         for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
  609             in6p != (void *)&table->inpt_queue;
  610             in6p = nin6p) {
  611                 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
  612 
  613                 if (in6p->in6p_af != AF_INET6)
  614                         continue;
  615 
  616                 /*
  617                  * Under the following condition, notify of redirects
  618                  * to the pcb, without making address matches against inpcb.
  619                  * - redirect notification is arrived.
  620                  * - the inpcb is unconnected.
  621                  * - the inpcb is caching !RTF_HOST routing entry.
  622                  * - the ICMPv6 notification is from the gateway cached in the
  623                  *   inpcb.  i.e. ICMPv6 notification is from nexthop gateway
  624                  *   the inpcb used very recently.
  625                  *
  626                  * This is to improve interaction between netbsd/openbsd
  627                  * redirect handling code, and inpcb route cache code.
  628                  * without the clause, !RTF_HOST routing entry (which carries
  629                  * gateway used by inpcb right before the ICMPv6 redirect)
  630                  * will be cached forever in unconnected inpcb.
  631                  *
  632                  * There still is a question regarding to what is TRT:
  633                  * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be
  634                  *   generated on packet output.  inpcb will always cache
  635                  *   RTF_HOST routing entry so there's no need for the clause
  636                  *   (ICMPv6 redirect will update RTF_HOST routing entry,
  637                  *   and inpcb is caching it already).
  638                  *   However, bsdi/freebsd are vulnerable to local DoS attacks
  639                  *   due to the cloned routing entries.
  640                  * - Specwise, "destination cache" is mentioned in RFC2461.
  641                  *   Jinmei says that it implies bsdi/freebsd behavior, itojun
  642                  *   is not really convinced.
  643                  * - Having hiwat/lowat on # of cloned host route (redirect/
  644                  *   pmtud) may be a good idea.  netbsd/openbsd has it.  see
  645                  *   icmp6_mtudisc_update().
  646                  */
  647                 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) &&
  648                     IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
  649                     (rt = rtcache_validate(&in6p->in6p_route)) != NULL &&
  650                     !(rt->rt_flags & RTF_HOST)) {
  651                         const struct sockaddr_in6 *dst6;
  652 
  653                         dst6 = (const struct sockaddr_in6 *)
  654                             rtcache_getdst(&in6p->in6p_route);
  655                         if (dst6 == NULL)
  656                                 ;
  657                         else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr,
  658                             &sa6_dst->sin6_addr))
  659                                 goto do_notify;
  660                 }
  661 
  662                 /*
  663                  * If the error designates a new path MTU for a destination
  664                  * and the application (associated with this socket) wanted to
  665                  * know the value, notify. Note that we notify for all
  666                  * disconnected sockets if the corresponding application
  667                  * wanted. This is because some UDP applications keep sending
  668                  * sockets disconnected.
  669                  * XXX: should we avoid to notify the value to TCP sockets?
  670                  */
  671                 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 &&
  672                     (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) ||
  673                      IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) {
  674                         ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst,
  675                                         (u_int32_t *)cmdarg);
  676                 }
  677 
  678                 /*
  679                  * Detect if we should notify the error. If no source and
  680                  * destination ports are specified, but non-zero flowinfo and
  681                  * local address match, notify the error. This is the case
  682                  * when the error is delivered with an encrypted buffer
  683                  * by ESP. Otherwise, just compare addresses and ports
  684                  * as usual.
  685                  */
  686                 if (lport == 0 && fport == 0 && flowinfo &&
  687                     in6p->in6p_socket != NULL &&
  688                     flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
  689                     IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr))
  690                         goto do_notify;
  691                 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
  692                                              &sa6_dst->sin6_addr) ||
  693                     in6p->in6p_socket == 0 ||
  694                     (lport && in6p->in6p_lport != lport) ||
  695                     (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
  696                      !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
  697                                          &sa6_src.sin6_addr)) ||
  698                     (fport && in6p->in6p_fport != fport))
  699                         continue;
  700 
  701           do_notify:
  702                 if (notify)
  703                         (*notify)(in6p, errno);
  704                 nmatch++;
  705         }
  706         return nmatch;
  707 }
  708 
  709 void
  710 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp)
  711 {
  712         struct in6pcb *in6p, *nin6p;
  713         struct ip6_moptions *im6o;
  714         struct in6_multi_mship *imm, *nimm;
  715 
  716         for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
  717             in6p != (void *)&table->inpt_queue;
  718             in6p = nin6p) {
  719                 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
  720                 if (in6p->in6p_af != AF_INET6)
  721                         continue;
  722 
  723                 im6o = in6p->in6p_moptions;
  724                 if (im6o) {
  725                         /*
  726                          * Unselect the outgoing interface if it is being
  727                          * detached.
  728                          */
  729                         if (im6o->im6o_multicast_ifp == ifp)
  730                                 im6o->im6o_multicast_ifp = NULL;
  731 
  732                         /*
  733                          * Drop multicast group membership if we joined
  734                          * through the interface being detached.
  735                          * XXX controversial - is it really legal for kernel
  736                          * to force this?
  737                          */
  738                         for (imm = im6o->im6o_memberships.lh_first;
  739                              imm != NULL; imm = nimm) {
  740                                 nimm = imm->i6mm_chain.le_next;
  741                                 if (imm->i6mm_maddr->in6m_ifp == ifp) {
  742                                         LIST_REMOVE(imm, i6mm_chain);
  743                                         in6_leavegroup(imm);
  744                                 }
  745                         }
  746                 }
  747         }
  748 }
  749 
  750 void
  751 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp)
  752 {
  753         struct rtentry *rt;
  754         struct in6pcb *in6p, *nin6p;
  755 
  756         for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
  757             in6p != (void *)&table->inpt_queue;
  758             in6p = nin6p) {
  759                 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
  760                 if (in6p->in6p_af != AF_INET6)
  761                         continue;
  762                 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL &&
  763                     rt->rt_ifp == ifp)
  764                         in6_rtchange(in6p, 0);
  765         }
  766 }
  767 
  768 /*
  769  * Check for alternatives when higher level complains
  770  * about service problems.  For now, invalidate cached
  771  * routing information.  If the route was created dynamically
  772  * (by a redirect), time to try a default gateway again.
  773  */
  774 void
  775 in6_losing(struct in6pcb *in6p)
  776 {
  777         struct rtentry *rt;
  778         struct rt_addrinfo info;
  779 
  780         if (in6p->in6p_af != AF_INET6)
  781                 return;
  782 
  783         if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL)
  784                 return;
  785 
  786         memset(&info, 0, sizeof(info));
  787         info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route);
  788         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
  789         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
  790         rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
  791         if (rt->rt_flags & RTF_DYNAMIC) {
  792                 (void)rtrequest(RTM_DELETE, rt_getkey(rt),
  793                     rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL);
  794         }
  795         /*
  796          * A new route can be allocated
  797          * the next time output is attempted.
  798          */
  799         rtcache_free(&in6p->in6p_route);
  800 }
  801 
  802 /*
  803  * After a routing change, flush old routing.  A new route can be
  804  * allocated the next time output is attempted.
  805  */
  806 void
  807 in6_rtchange(struct in6pcb *in6p, int errno)
  808 {
  809         if (in6p->in6p_af != AF_INET6)
  810                 return;
  811 
  812         rtcache_free(&in6p->in6p_route);
  813         /*
  814          * A new route can be allocated the next time
  815          * output is attempted.
  816          */
  817 }
  818 
  819 struct in6pcb *
  820 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 
  821         u_int lport_arg, int lookup_wildcard)
  822 {
  823         struct inpcbhead *head;
  824         struct inpcb_hdr *inph;
  825         struct in6pcb *in6p, *match = 0;
  826         int matchwild = 3, wildcard;
  827         u_int16_t lport = lport_arg;
  828 
  829         head = IN6PCBHASH_PORT(table, lport);
  830         LIST_FOREACH(inph, head, inph_lhash) {
  831                 in6p = (struct in6pcb *)inph;
  832                 if (in6p->in6p_af != AF_INET6)
  833                         continue;
  834 
  835                 if (in6p->in6p_lport != lport)
  836                         continue;
  837                 wildcard = 0;
  838                 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
  839                         if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  840                                 continue;
  841                 }
  842                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
  843                         wildcard++;
  844                 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) {
  845                         if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  846                                 continue;
  847                         if (!IN6_IS_ADDR_V4MAPPED(laddr6))
  848                                 continue;
  849 
  850                         /* duplicate of IPv4 logic */
  851                         wildcard = 0;
  852                         if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) &&
  853                             in6p->in6p_faddr.s6_addr32[3])
  854                                 wildcard++;
  855                         if (!in6p->in6p_laddr.s6_addr32[3]) {
  856                                 if (laddr6->s6_addr32[3])
  857                                         wildcard++;
  858                         } else {
  859                                 if (!laddr6->s6_addr32[3])
  860                                         wildcard++;
  861                                 else {
  862                                         if (in6p->in6p_laddr.s6_addr32[3] !=
  863                                             laddr6->s6_addr32[3])
  864                                                 continue;
  865                                 }
  866                         }
  867                 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
  868                         if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
  869                                 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  870                                         continue;
  871                         }
  872                         if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
  873                                 wildcard++;
  874                 } else {
  875                         if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
  876                                 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
  877                                         continue;
  878                         }
  879                         if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
  880                                 wildcard++;
  881                         else {
  882                                 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
  883                                     laddr6))
  884                                         continue;
  885                         }
  886                 }
  887                 if (wildcard && !lookup_wildcard)
  888                         continue;
  889                 if (wildcard < matchwild) {
  890                         match = in6p;
  891                         matchwild = wildcard;
  892                         if (matchwild == 0)
  893                                 break;
  894                 }
  895         }
  896         return (match);
  897 }
  898 #undef continue
  899 
  900 /*
  901  * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to
  902  * IPv4 mapped address.
  903  */
  904 struct rtentry *
  905 in6_pcbrtentry(struct in6pcb *in6p)
  906 {
  907         struct rtentry *rt;
  908         struct route *ro;
  909         union {
  910                 const struct sockaddr *sa;
  911                 const struct sockaddr_in6 *sa6;
  912 #ifdef INET
  913                 const struct sockaddr_in *sa4;
  914 #endif
  915         } cdst;
  916 
  917         ro = &in6p->in6p_route;
  918 
  919         if (in6p->in6p_af != AF_INET6)
  920                 return (NULL);
  921 
  922         cdst.sa = rtcache_getdst(ro);
  923         if (cdst.sa == NULL)
  924                 ;
  925 #ifdef INET
  926         else if (cdst.sa->sa_family == AF_INET) {
  927                 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr));
  928                 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3])
  929                         rtcache_free(ro);
  930         }
  931 #endif
  932         else {
  933                 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr,
  934                                         &in6p->in6p_faddr))
  935                         rtcache_free(ro);
  936         }
  937         if ((rt = rtcache_validate(ro)) == NULL)
  938                 rt = rtcache_update(ro, 1);
  939 #ifdef INET
  940         if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
  941                 union {
  942                         struct sockaddr         dst;
  943                         struct sockaddr_in      dst4;
  944                 } u;
  945                 struct in_addr addr;
  946 
  947                 addr.s_addr = in6p->in6p_faddr.s6_addr32[3];
  948 
  949                 sockaddr_in_init(&u.dst4, &addr, 0);
  950                 rtcache_setdst(ro, &u.dst);
  951 
  952                 rt = rtcache_init(ro);
  953         } else
  954 #endif
  955         if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
  956                 union {
  957                         struct sockaddr         dst;
  958                         struct sockaddr_in6     dst6;
  959                 } u;
  960 
  961                 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0);
  962                 rtcache_setdst(ro, &u.dst);
  963 
  964                 rt = rtcache_init(ro);
  965         }
  966         return rt;
  967 }
  968 
  969 struct in6pcb *
  970 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6,
  971     u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg,
  972     int faith)
  973 {
  974         struct inpcbhead *head;
  975         struct inpcb_hdr *inph;
  976         struct in6pcb *in6p;
  977         u_int16_t fport = fport_arg, lport = lport_arg;
  978 
  979         head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport);
  980         LIST_FOREACH(inph, head, inph_hash) {
  981                 in6p = (struct in6pcb *)inph;
  982                 if (in6p->in6p_af != AF_INET6)
  983                         continue;
  984 
  985                 /* find exact match on both source and dest */
  986                 if (in6p->in6p_fport != fport)
  987                         continue;
  988                 if (in6p->in6p_lport != lport)
  989                         continue;
  990                 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
  991                         continue;
  992                 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6))
  993                         continue;
  994                 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
  995                         continue;
  996                 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
  997                         continue;
  998                 if ((IN6_IS_ADDR_V4MAPPED(laddr6) ||
  999                      IN6_IS_ADDR_V4MAPPED(faddr6)) &&
 1000                     (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
 1001                         continue;
 1002                 return in6p;
 1003         }
 1004         return NULL;
 1005 }
 1006 
 1007 struct in6pcb *
 1008 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 
 1009         u_int lport_arg, int faith)
 1010 {
 1011         struct inpcbhead *head;
 1012         struct inpcb_hdr *inph;
 1013         struct in6pcb *in6p;
 1014         u_int16_t lport = lport_arg;
 1015 #ifdef INET
 1016         struct in6_addr zero_mapped;
 1017 #endif
 1018 
 1019         head = IN6PCBHASH_BIND(table, laddr6, lport);
 1020         LIST_FOREACH(inph, head, inph_hash) {
 1021                 in6p = (struct in6pcb *)inph;
 1022                 if (in6p->in6p_af != AF_INET6)
 1023                         continue;
 1024 
 1025                 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
 1026                         continue;
 1027                 if (in6p->in6p_fport != 0)
 1028                         continue;
 1029                 if (in6p->in6p_lport != lport)
 1030                         continue;
 1031                 if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
 1032                     (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
 1033                         continue;
 1034                 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
 1035                         goto out;
 1036         }
 1037 #ifdef INET
 1038         if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
 1039                 memset(&zero_mapped, 0, sizeof(zero_mapped));
 1040                 zero_mapped.s6_addr16[5] = 0xffff;
 1041                 head = IN6PCBHASH_BIND(table, &zero_mapped, lport);
 1042                 LIST_FOREACH(inph, head, inph_hash) {
 1043                         in6p = (struct in6pcb *)inph;
 1044                         if (in6p->in6p_af != AF_INET6)
 1045                                 continue;
 1046 
 1047                         if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
 1048                                 continue;
 1049                         if (in6p->in6p_fport != 0)
 1050                                 continue;
 1051                         if (in6p->in6p_lport != lport)
 1052                                 continue;
 1053                         if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
 1054                                 continue;
 1055                         if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped))
 1056                                 goto out;
 1057                 }
 1058         }
 1059 #endif
 1060         head = IN6PCBHASH_BIND(table, &zeroin6_addr, 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 (IN6_IS_ADDR_V4MAPPED(laddr6) &&
 1073                     (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
 1074                         continue;
 1075                 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr))
 1076                         goto out;
 1077         }
 1078         return (NULL);
 1079 
 1080 out:
 1081         inph = &in6p->in6p_head;
 1082         if (inph != LIST_FIRST(head)) {
 1083                 LIST_REMOVE(inph, inph_hash);
 1084                 LIST_INSERT_HEAD(head, inph, inph_hash);
 1085         }
 1086         return in6p;
 1087 }
 1088 
 1089 void
 1090 in6_pcbstate(struct in6pcb *in6p, int state)
 1091 {
 1092 
 1093         if (in6p->in6p_af != AF_INET6)
 1094                 return;
 1095 
 1096         if (in6p->in6p_state > IN6P_ATTACHED)
 1097                 LIST_REMOVE(&in6p->in6p_head, inph_hash);
 1098 
 1099         switch (state) {
 1100         case IN6P_BOUND:
 1101                 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table,
 1102                     &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
 1103                     inph_hash);
 1104                 break;
 1105         case IN6P_CONNECTED:
 1106                 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table,
 1107                     &in6p->in6p_faddr, in6p->in6p_fport,
 1108                     &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
 1109                     inph_hash);
 1110                 break;
 1111         }
 1112 
 1113         in6p->in6p_state = state;
 1114 }

Cache object: 633e4a9f714aa0e94f9977fb75eef2c2


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.