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in6_pcb.c revision 1.105
      1  1.105      elad /*	$NetBSD: in6_pcb.c,v 1.105 2009/04/20 19:57:18 elad Exp $	*/
      2   1.35    itojun /*	$KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun Exp $	*/
      3    1.5   thorpej 
      4    1.2    itojun /*
      5    1.2    itojun  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      6    1.2    itojun  * All rights reserved.
      7   1.23    itojun  *
      8    1.2    itojun  * Redistribution and use in source and binary forms, with or without
      9    1.2    itojun  * modification, are permitted provided that the following conditions
     10    1.2    itojun  * are met:
     11    1.2    itojun  * 1. Redistributions of source code must retain the above copyright
     12    1.2    itojun  *    notice, this list of conditions and the following disclaimer.
     13    1.2    itojun  * 2. Redistributions in binary form must reproduce the above copyright
     14    1.2    itojun  *    notice, this list of conditions and the following disclaimer in the
     15    1.2    itojun  *    documentation and/or other materials provided with the distribution.
     16    1.2    itojun  * 3. Neither the name of the project nor the names of its contributors
     17    1.2    itojun  *    may be used to endorse or promote products derived from this software
     18    1.2    itojun  *    without specific prior written permission.
     19   1.23    itojun  *
     20    1.2    itojun  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     21    1.2    itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     22    1.2    itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     23    1.2    itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     24    1.2    itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25    1.2    itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26    1.2    itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27    1.2    itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28    1.2    itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29    1.2    itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30    1.2    itojun  * SUCH DAMAGE.
     31    1.2    itojun  */
     32    1.2    itojun 
     33    1.2    itojun /*
     34    1.2    itojun  * Copyright (c) 1982, 1986, 1991, 1993
     35    1.2    itojun  *	The Regents of the University of California.  All rights reserved.
     36    1.2    itojun  *
     37    1.2    itojun  * Redistribution and use in source and binary forms, with or without
     38    1.2    itojun  * modification, are permitted provided that the following conditions
     39    1.2    itojun  * are met:
     40    1.2    itojun  * 1. Redistributions of source code must retain the above copyright
     41    1.2    itojun  *    notice, this list of conditions and the following disclaimer.
     42    1.2    itojun  * 2. Redistributions in binary form must reproduce the above copyright
     43    1.2    itojun  *    notice, this list of conditions and the following disclaimer in the
     44    1.2    itojun  *    documentation and/or other materials provided with the distribution.
     45   1.54       agc  * 3. Neither the name of the University nor the names of its contributors
     46    1.2    itojun  *    may be used to endorse or promote products derived from this software
     47    1.2    itojun  *    without specific prior written permission.
     48    1.2    itojun  *
     49    1.2    itojun  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     50    1.2    itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     51    1.2    itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     52    1.2    itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     53    1.2    itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     54    1.2    itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     55    1.2    itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     56    1.2    itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     57    1.2    itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     58    1.2    itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     59    1.2    itojun  * SUCH DAMAGE.
     60    1.2    itojun  *
     61    1.2    itojun  *	@(#)in_pcb.c	8.2 (Berkeley) 1/4/94
     62    1.2    itojun  */
     63   1.44     lukem 
     64   1.44     lukem #include <sys/cdefs.h>
     65  1.105      elad __KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.105 2009/04/20 19:57:18 elad Exp $");
     66    1.7   thorpej 
     67   1.53     perry #include "opt_inet.h"
     68    1.7   thorpej #include "opt_ipsec.h"
     69    1.2    itojun 
     70    1.2    itojun #include <sys/param.h>
     71    1.2    itojun #include <sys/systm.h>
     72    1.2    itojun #include <sys/malloc.h>
     73    1.2    itojun #include <sys/mbuf.h>
     74    1.2    itojun #include <sys/protosw.h>
     75    1.2    itojun #include <sys/socket.h>
     76    1.2    itojun #include <sys/socketvar.h>
     77    1.2    itojun #include <sys/ioctl.h>
     78    1.2    itojun #include <sys/errno.h>
     79    1.2    itojun #include <sys/time.h>
     80    1.2    itojun #include <sys/proc.h>
     81   1.71      elad #include <sys/kauth.h>
     82  1.104      elad #include <sys/domain.h>
     83    1.2    itojun 
     84    1.2    itojun #include <net/if.h>
     85    1.2    itojun #include <net/route.h>
     86    1.2    itojun 
     87    1.2    itojun #include <netinet/in.h>
     88    1.2    itojun #include <netinet/in_var.h>
     89    1.2    itojun #include <netinet/in_systm.h>
     90    1.2    itojun #include <netinet/ip.h>
     91    1.2    itojun #include <netinet/in_pcb.h>
     92   1.19    itojun #include <netinet/ip6.h>
     93   1.11    itojun #include <netinet6/ip6_var.h>
     94    1.2    itojun #include <netinet6/in6_pcb.h>
     95   1.69    rpaulo #include <netinet6/scope6_var.h>
     96    1.2    itojun #include <netinet6/nd6.h>
     97    1.2    itojun 
     98    1.8    itojun #include "faith.h"
     99    1.2    itojun 
    100    1.2    itojun #ifdef IPSEC
    101    1.2    itojun #include <netinet6/ipsec.h>
    102    1.2    itojun #include <netkey/key.h>
    103    1.2    itojun #endif /* IPSEC */
    104    1.2    itojun 
    105   1.64  jonathan #ifdef FAST_IPSEC
    106   1.64  jonathan #include <netipsec/ipsec.h>
    107   1.64  jonathan #include <netipsec/ipsec6.h>
    108   1.64  jonathan #include <netipsec/key.h>
    109   1.64  jonathan #endif /* FAST_IPSEC */
    110   1.64  jonathan 
    111   1.99      matt const struct in6_addr zeroin6_addr;
    112   1.30    itojun 
    113   1.60    itojun #define	IN6PCBHASH_PORT(table, lport) \
    114   1.60    itojun 	&(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash]
    115   1.56    itojun #define IN6PCBHASH_BIND(table, laddr, lport) \
    116   1.56    itojun 	&(table)->inpt_bindhashtbl[ \
    117   1.56    itojun 	    (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
    118   1.56    itojun 	      (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \
    119   1.56    itojun 	    (table)->inpt_bindhash]
    120   1.56    itojun #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \
    121   1.56    itojun 	&(table)->inpt_bindhashtbl[ \
    122   1.56    itojun 	    ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \
    123   1.56    itojun 	      (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \
    124   1.56    itojun 	     (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
    125   1.56    itojun 	      (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \
    126   1.56    itojun 	      ntohs(lport))) & (table)->inpt_bindhash]
    127   1.56    itojun 
    128   1.30    itojun int ip6_anonportmin = IPV6PORT_ANONMIN;
    129   1.30    itojun int ip6_anonportmax = IPV6PORT_ANONMAX;
    130   1.30    itojun int ip6_lowportmin  = IPV6PORT_RESERVEDMIN;
    131   1.30    itojun int ip6_lowportmax  = IPV6PORT_RESERVEDMAX;
    132    1.2    itojun 
    133   1.85        ad POOL_INIT(in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl", NULL,
    134   1.85        ad     IPL_SOFTNET);
    135   1.56    itojun 
    136   1.56    itojun void
    137   1.87  christos in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize)
    138   1.56    itojun {
    139   1.56    itojun 
    140   1.56    itojun 	in_pcbinit(table, bindhashsize, connecthashsize);
    141   1.56    itojun 	table->inpt_lastport = (u_int16_t)ip6_anonportmax;
    142   1.56    itojun }
    143   1.56    itojun 
    144    1.2    itojun int
    145   1.87  christos in6_pcballoc(struct socket *so, void *v)
    146    1.2    itojun {
    147   1.56    itojun 	struct inpcbtable *table = v;
    148    1.2    itojun 	struct in6pcb *in6p;
    149   1.46    itojun 	int s;
    150   1.64  jonathan #if defined(IPSEC) || defined(FAST_IPSEC)
    151   1.39    itojun 	int error;
    152   1.39    itojun #endif
    153    1.2    itojun 
    154   1.73       tls 	s = splnet();
    155   1.56    itojun 	in6p = pool_get(&in6pcb_pool, PR_NOWAIT);
    156   1.73       tls 	splx(s);
    157    1.2    itojun 	if (in6p == NULL)
    158   1.52    itojun 		return (ENOBUFS);
    159  1.100    cegger 	memset((void *)in6p, 0, sizeof(*in6p));
    160   1.56    itojun 	in6p->in6p_af = AF_INET6;
    161   1.56    itojun 	in6p->in6p_table = table;
    162    1.2    itojun 	in6p->in6p_socket = so;
    163    1.2    itojun 	in6p->in6p_hops = -1;	/* use kernel default */
    164    1.2    itojun 	in6p->in6p_icmp6filt = NULL;
    165   1.64  jonathan #if defined(IPSEC) || defined(FAST_IPSEC)
    166   1.49    itojun 	error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp);
    167   1.39    itojun 	if (error != 0) {
    168   1.73       tls 		s = splnet();
    169   1.56    itojun 		pool_put(&in6pcb_pool, in6p);
    170   1.73       tls 		splx(s);
    171   1.39    itojun 		return error;
    172   1.39    itojun 	}
    173   1.43    itojun #endif /* IPSEC */
    174   1.46    itojun 	s = splnet();
    175   1.56    itojun 	CIRCLEQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p,
    176   1.56    itojun 	    inph_queue);
    177   1.60    itojun 	LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
    178   1.60    itojun 	    &in6p->in6p_head, inph_lhash);
    179   1.56    itojun 	in6_pcbstate(in6p, IN6P_ATTACHED);
    180   1.46    itojun 	splx(s);
    181   1.41    itojun 	if (ip6_v6only)
    182   1.41    itojun 		in6p->in6p_flags |= IN6P_IPV6_V6ONLY;
    183   1.84  christos 	so->so_pcb = (void *)in6p;
    184   1.52    itojun 	return (0);
    185    1.2    itojun }
    186    1.2    itojun 
    187  1.104      elad /*
    188  1.104      elad  * Bind address from sin6 to in6p.
    189  1.104      elad  */
    190    1.2    itojun int
    191  1.104      elad in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l)
    192    1.2    itojun {
    193  1.104      elad 	int error;
    194  1.104      elad 
    195  1.104      elad 	/*
    196  1.104      elad 	 * We should check the family, but old programs
    197  1.104      elad 	 * incorrectly fail to intialize it.
    198  1.104      elad 	 */
    199  1.104      elad 	if (sin6->sin6_family != AF_INET6)
    200  1.104      elad 		return (EAFNOSUPPORT);
    201    1.2    itojun 
    202  1.104      elad #ifndef INET
    203  1.104      elad 	if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
    204  1.104      elad 		return (EADDRNOTAVAIL);
    205  1.104      elad #endif
    206   1.56    itojun 
    207  1.104      elad 	if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
    208  1.104      elad 		return (error);
    209   1.69    rpaulo 
    210  1.104      elad 	if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
    211  1.104      elad 		if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
    212   1.52    itojun 			return (EINVAL);
    213  1.104      elad 		if (sin6->sin6_addr.s6_addr32[3]) {
    214  1.104      elad 			struct sockaddr_in sin;
    215  1.104      elad 
    216  1.104      elad 			memset(&sin, 0, sizeof(sin));
    217  1.104      elad 			sin.sin_len = sizeof(sin);
    218  1.104      elad 			sin.sin_family = AF_INET;
    219  1.104      elad 			bcopy(&sin6->sin6_addr.s6_addr32[3],
    220  1.104      elad 			    &sin.sin_addr, sizeof(sin.sin_addr));
    221  1.104      elad 			if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0)
    222  1.104      elad 				return EADDRNOTAVAIL;
    223  1.104      elad 		}
    224  1.104      elad 	} else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
    225  1.104      elad 		struct ifaddr *ia = NULL;
    226  1.104      elad 
    227  1.104      elad 		if ((in6p->in6p_flags & IN6P_FAITH) == 0 &&
    228  1.104      elad 		    (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
    229  1.104      elad 			return (EADDRNOTAVAIL);
    230  1.104      elad 
    231    1.2    itojun 		/*
    232  1.104      elad 		 * bind to an anycast address might accidentally
    233  1.104      elad 		 * cause sending a packet with an anycast source
    234  1.104      elad 		 * address, so we forbid it.
    235  1.104      elad 		 *
    236  1.104      elad 		 * We should allow to bind to a deprecated address,
    237  1.104      elad 		 * since the application dare to use it.
    238  1.104      elad 		 * But, can we assume that they are careful enough
    239  1.104      elad 		 * to check if the address is deprecated or not?
    240  1.104      elad 		 * Maybe, as a safeguard, we should have a setsockopt
    241  1.104      elad 		 * flag to control the bind(2) behavior against
    242  1.104      elad 		 * deprecated addresses (default: forbid bind(2)).
    243    1.2    itojun 		 */
    244  1.104      elad 		if (ia &&
    245  1.104      elad 		    ((struct in6_ifaddr *)ia)->ia6_flags &
    246  1.104      elad 		    (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED))
    247  1.104      elad 			return (EADDRNOTAVAIL);
    248  1.104      elad 	}
    249  1.104      elad 
    250  1.104      elad 
    251  1.104      elad 	in6p->in6p_laddr = sin6->sin6_addr;
    252   1.22    itojun 
    253    1.2    itojun 
    254  1.104      elad 	return (0);
    255  1.104      elad }
    256    1.2    itojun 
    257  1.104      elad /*
    258  1.104      elad  * Bind port from sin6 to in6p.
    259  1.104      elad  */
    260  1.104      elad int
    261  1.104      elad in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l)
    262  1.104      elad {
    263  1.104      elad 	struct inpcbtable *table = in6p->in6p_table;
    264  1.104      elad 	struct socket *so = in6p->in6p_socket;
    265  1.104      elad 	int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
    266  1.105      elad 	int error;
    267    1.2    itojun 
    268  1.104      elad 	if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 &&
    269  1.104      elad 	   ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
    270  1.104      elad 	    (so->so_options & SO_ACCEPTCONN) == 0))
    271  1.104      elad 		wild = 1;
    272    1.2    itojun 
    273  1.105      elad 	if (sin6->sin6_port != 0) {
    274  1.105      elad 		enum kauth_network_req req;
    275  1.105      elad 
    276   1.13    itojun #ifndef IPNOPRIVPORTS
    277  1.105      elad 		if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED)
    278  1.105      elad 			req = KAUTH_REQ_NETWORK_BIND_PRIVPORT;
    279  1.105      elad 		else
    280  1.105      elad #endif /* IPNOPRIVPORTS */
    281  1.105      elad 			req = KAUTH_REQ_NETWORK_BIND_PORT;
    282  1.105      elad 
    283  1.105      elad 		error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND,
    284  1.105      elad 		    req, so, sin6, NULL);
    285  1.105      elad 		if (error)
    286  1.105      elad 			return (error);
    287  1.105      elad 	}
    288    1.2    itojun 
    289  1.104      elad 	if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
    290  1.104      elad 		/*
    291  1.104      elad 		 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
    292  1.104      elad 		 * allow compepte duplication of binding if
    293  1.104      elad 		 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
    294  1.104      elad 		 * and a multicast address is bound on both
    295  1.104      elad 		 * new and duplicated sockets.
    296  1.104      elad 		 */
    297  1.104      elad 		if (so->so_options & SO_REUSEADDR)
    298  1.104      elad 			reuseport = SO_REUSEADDR|SO_REUSEPORT;
    299  1.104      elad 	}
    300  1.104      elad 
    301  1.104      elad 	if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
    302   1.56    itojun #ifdef INET
    303  1.104      elad 		struct inpcb *t;
    304    1.2    itojun 
    305  1.104      elad 		t = in_pcblookup_port(table,
    306  1.104      elad 		    *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3],
    307  1.104      elad 		    sin6->sin6_port, wild);
    308  1.104      elad 		if (t && (reuseport & t->inp_socket->so_options) == 0)
    309  1.104      elad 			return (EADDRINUSE);
    310   1.56    itojun #else
    311  1.104      elad 		return (EADDRNOTAVAIL);
    312    1.2    itojun #endif
    313  1.104      elad 	}
    314   1.56    itojun 
    315  1.104      elad 	{
    316  1.104      elad 		struct in6pcb *t;
    317    1.2    itojun 
    318  1.104      elad 		t = in6_pcblookup_port(table, &sin6->sin6_addr,
    319  1.104      elad 		    sin6->sin6_port, wild);
    320  1.104      elad 		if (t && (reuseport & t->in6p_socket->so_options) == 0)
    321  1.104      elad 			return (EADDRINUSE);
    322    1.2    itojun 	}
    323   1.10    itojun 
    324  1.104      elad 	if (sin6->sin6_port == 0) {
    325   1.10    itojun 		int e;
    326   1.72        ad 		e = in6_pcbsetport(&in6p->in6p_laddr, in6p, l);
    327   1.56    itojun 		if (e != 0)
    328   1.52    itojun 			return (e);
    329   1.56    itojun 	} else {
    330  1.104      elad 		in6p->in6p_lport = sin6->sin6_port;
    331   1.56    itojun 		in6_pcbstate(in6p, IN6P_BOUND);
    332   1.10    itojun 	}
    333   1.10    itojun 
    334   1.60    itojun 	LIST_REMOVE(&in6p->in6p_head, inph_lhash);
    335   1.60    itojun 	LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
    336   1.60    itojun 	    &in6p->in6p_head, inph_lhash);
    337   1.60    itojun 
    338  1.104      elad 	return (0);
    339  1.104      elad }
    340  1.104      elad 
    341  1.104      elad int
    342  1.104      elad in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l)
    343  1.104      elad {
    344  1.104      elad 	struct in6pcb *in6p = v;
    345  1.104      elad 	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
    346  1.104      elad 	int error;
    347  1.104      elad 
    348  1.104      elad 	if (in6p->in6p_af != AF_INET6)
    349  1.104      elad 		return (EINVAL);
    350  1.104      elad 
    351  1.104      elad 	/*
    352  1.104      elad 	 * If we already have a local port or a local address it means we're
    353  1.104      elad 	 * bounded.
    354  1.104      elad 	 */
    355  1.104      elad 	if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
    356  1.104      elad 		return (EINVAL);
    357  1.104      elad 
    358  1.104      elad 	if (nam != NULL) {
    359  1.104      elad 		/* We were provided a sockaddr_in6 to use. */
    360  1.104      elad 		sin6 = mtod(nam, struct sockaddr_in6 *);
    361  1.104      elad 		if (nam->m_len != sizeof(*sin6))
    362  1.104      elad 			return (EINVAL);
    363  1.104      elad 	} else {
    364  1.104      elad 		/* We always bind to *something*, even if it's "anything". */
    365  1.104      elad 		sin6 = (struct sockaddr_in6 *)
    366  1.104      elad 		    __UNCONST(in6p->in6p_socket->so_proto->pr_domain->dom_sa_any);
    367  1.104      elad 	}
    368  1.104      elad 
    369  1.104      elad 	/* Bind address. */
    370  1.104      elad 	error = in6_pcbbind_addr(in6p, sin6, l);
    371  1.104      elad 	if (error)
    372  1.104      elad 		return (error);
    373  1.104      elad 
    374  1.104      elad 	/* Bind port. */
    375  1.104      elad 	error = in6_pcbbind_port(in6p, sin6, l);
    376  1.104      elad 	if (error) {
    377  1.104      elad 		/*
    378  1.104      elad 		 * Reset the address here to "any" so we don't "leak" the
    379  1.104      elad 		 * in6pcb.
    380  1.104      elad 		 */
    381  1.104      elad 		in6p->in6p_laddr = in6addr_any;
    382  1.104      elad 
    383  1.104      elad 		return (error);
    384  1.104      elad 	}
    385  1.104      elad 
    386  1.104      elad 
    387   1.57    itojun #if 0
    388   1.57    itojun 	in6p->in6p_flowinfo = 0;	/* XXX */
    389   1.57    itojun #endif
    390   1.52    itojun 	return (0);
    391   1.10    itojun }
    392   1.10    itojun 
    393   1.10    itojun /*
    394    1.2    itojun  * Connect from a socket to a specified address.
    395    1.2    itojun  * Both address and port must be specified in argument sin6.
    396    1.2    itojun  * If don't have a local address for this socket yet,
    397    1.2    itojun  * then pick one.
    398    1.2    itojun  */
    399    1.2    itojun int
    400   1.87  christos in6_pcbconnect(void *v, struct mbuf *nam, struct lwp *l)
    401    1.2    itojun {
    402   1.91    dyoung 	struct rtentry *rt;
    403   1.56    itojun 	struct in6pcb *in6p = v;
    404    1.2    itojun 	struct in6_addr *in6a = NULL;
    405    1.2    itojun 	struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *);
    406    1.2    itojun 	struct ifnet *ifp = NULL;	/* outgoing interface */
    407    1.2    itojun 	int error = 0;
    408   1.69    rpaulo 	int scope_ambiguous = 0;
    409   1.31    itojun #ifdef INET
    410    1.2    itojun 	struct in6_addr mapped;
    411   1.31    itojun #endif
    412   1.26    itojun 	struct sockaddr_in6 tmp;
    413    1.2    itojun 
    414    1.2    itojun 	(void)&in6a;				/* XXX fool gcc */
    415    1.2    itojun 
    416   1.56    itojun 	if (in6p->in6p_af != AF_INET6)
    417   1.56    itojun 		return (EINVAL);
    418   1.56    itojun 
    419    1.2    itojun 	if (nam->m_len != sizeof(*sin6))
    420   1.52    itojun 		return (EINVAL);
    421    1.2    itojun 	if (sin6->sin6_family != AF_INET6)
    422   1.52    itojun 		return (EAFNOSUPPORT);
    423    1.2    itojun 	if (sin6->sin6_port == 0)
    424   1.52    itojun 		return (EADDRNOTAVAIL);
    425    1.2    itojun 
    426   1.69    rpaulo 	if (sin6->sin6_scope_id == 0 && !ip6_use_defzone)
    427   1.69    rpaulo 		scope_ambiguous = 1;
    428   1.69    rpaulo 	if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
    429   1.69    rpaulo 		return(error);
    430   1.69    rpaulo 
    431    1.2    itojun 	/* sanity check for mapped address case */
    432    1.2    itojun 	if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
    433   1.41    itojun 		if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
    434   1.41    itojun 			return EINVAL;
    435    1.2    itojun 		if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
    436    1.2    itojun 			in6p->in6p_laddr.s6_addr16[5] = htons(0xffff);
    437    1.2    itojun 		if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
    438    1.2    itojun 			return EINVAL;
    439   1.41    itojun 	} else
    440   1.41    itojun 	{
    441    1.2    itojun 		if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
    442    1.2    itojun 			return EINVAL;
    443    1.2    itojun 	}
    444   1.26    itojun 
    445   1.26    itojun 	/* protect *sin6 from overwrites */
    446   1.26    itojun 	tmp = *sin6;
    447   1.26    itojun 	sin6 = &tmp;
    448    1.2    itojun 
    449    1.2    itojun 	/* Source address selection. */
    450   1.56    itojun 	if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
    451   1.56    itojun 	    in6p->in6p_laddr.s6_addr32[3] == 0) {
    452   1.31    itojun #ifdef INET
    453    1.2    itojun 		struct sockaddr_in sin, *sinp;
    454    1.2    itojun 
    455  1.100    cegger 		memset(&sin, 0, sizeof(sin));
    456    1.2    itojun 		sin.sin_len = sizeof(sin);
    457    1.2    itojun 		sin.sin_family = AF_INET;
    458  1.103   tsutsui 		memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3],
    459    1.2    itojun 			sizeof(sin.sin_addr));
    460   1.86    dyoung 		sinp = in_selectsrc(&sin, &in6p->in6p_route,
    461    1.2    itojun 			in6p->in6p_socket->so_options, NULL, &error);
    462    1.2    itojun 		if (sinp == 0) {
    463    1.2    itojun 			if (error == 0)
    464    1.2    itojun 				error = EADDRNOTAVAIL;
    465   1.52    itojun 			return (error);
    466    1.2    itojun 		}
    467  1.100    cegger 		memset(&mapped, 0, sizeof(mapped));
    468    1.2    itojun 		mapped.s6_addr16[5] = htons(0xffff);
    469  1.103   tsutsui 		memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr));
    470    1.2    itojun 		in6a = &mapped;
    471   1.31    itojun #else
    472   1.31    itojun 		return EADDRNOTAVAIL;
    473   1.31    itojun #endif
    474   1.69    rpaulo 	} else {
    475   1.10    itojun 		/*
    476   1.10    itojun 		 * XXX: in6_selectsrc might replace the bound local address
    477   1.10    itojun 		 * with the address specified by setsockopt(IPV6_PKTINFO).
    478   1.10    itojun 		 * Is it the intended behavior?
    479   1.10    itojun 		 */
    480    1.2    itojun 		in6a = in6_selectsrc(sin6, in6p->in6p_outputopts,
    481   1.10    itojun 				     in6p->in6p_moptions,
    482   1.86    dyoung 				     &in6p->in6p_route,
    483   1.69    rpaulo 				     &in6p->in6p_laddr, &ifp, &error);
    484   1.69    rpaulo 		if (ifp && scope_ambiguous &&
    485   1.69    rpaulo 		    (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
    486   1.69    rpaulo 			return(error);
    487   1.69    rpaulo 		}
    488   1.69    rpaulo 
    489    1.2    itojun 		if (in6a == 0) {
    490    1.2    itojun 			if (error == 0)
    491    1.2    itojun 				error = EADDRNOTAVAIL;
    492   1.52    itojun 			return (error);
    493    1.2    itojun 		}
    494    1.2    itojun 	}
    495   1.94    dyoung 	if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL)
    496   1.91    dyoung 		ifp = rt->rt_ifp;
    497    1.2    itojun 
    498   1.10    itojun 	in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp);
    499    1.2    itojun 
    500   1.56    itojun 	if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr,
    501   1.56    itojun 	    sin6->sin6_port,
    502   1.56    itojun 	    IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr,
    503   1.56    itojun 	    in6p->in6p_lport, 0))
    504   1.52    itojun 		return (EADDRINUSE);
    505   1.56    itojun 	if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ||
    506   1.56    itojun 	    (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
    507   1.56    itojun 	     in6p->in6p_laddr.s6_addr32[3] == 0))
    508   1.41    itojun 	{
    509   1.29    itojun 		if (in6p->in6p_lport == 0) {
    510   1.72        ad 			error = in6_pcbbind(in6p, (struct mbuf *)0, l);
    511   1.68       dsl 			if (error != 0)
    512   1.68       dsl 				return error;
    513   1.29    itojun 		}
    514    1.2    itojun 		in6p->in6p_laddr = *in6a;
    515    1.2    itojun 	}
    516    1.2    itojun 	in6p->in6p_faddr = sin6->sin6_addr;
    517    1.2    itojun 	in6p->in6p_fport = sin6->sin6_port;
    518   1.56    itojun 	in6_pcbstate(in6p, IN6P_CONNECTED);
    519   1.57    itojun 	in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
    520   1.57    itojun 	if (ip6_auto_flowlabel)
    521   1.57    itojun 		in6p->in6p_flowinfo |=
    522   1.58    itojun 		    (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
    523   1.64  jonathan #if defined(IPSEC) || defined(FAST_IPSEC)
    524   1.40    itojun 	if (in6p->in6p_socket->so_type == SOCK_STREAM)
    525   1.40    itojun 		ipsec_pcbconn(in6p->in6p_sp);
    526   1.40    itojun #endif
    527   1.52    itojun 	return (0);
    528    1.2    itojun }
    529    1.2    itojun 
    530    1.2    itojun void
    531   1.87  christos in6_pcbdisconnect(struct in6pcb *in6p)
    532    1.2    itojun {
    533  1.100    cegger 	memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr));
    534    1.2    itojun 	in6p->in6p_fport = 0;
    535   1.56    itojun 	in6_pcbstate(in6p, IN6P_BOUND);
    536   1.57    itojun 	in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
    537   1.64  jonathan #if defined(IPSEC) || defined(FAST_IPSEC)
    538   1.40    itojun 	ipsec_pcbdisconn(in6p->in6p_sp);
    539   1.40    itojun #endif
    540   1.61    itojun 	if (in6p->in6p_socket->so_state & SS_NOFDREF)
    541   1.61    itojun 		in6_pcbdetach(in6p);
    542    1.2    itojun }
    543    1.2    itojun 
    544    1.2    itojun void
    545   1.87  christos in6_pcbdetach(struct in6pcb *in6p)
    546    1.2    itojun {
    547    1.2    itojun 	struct socket *so = in6p->in6p_socket;
    548   1.46    itojun 	int s;
    549    1.2    itojun 
    550   1.56    itojun 	if (in6p->in6p_af != AF_INET6)
    551   1.56    itojun 		return;
    552   1.56    itojun 
    553   1.64  jonathan #if defined(IPSEC) || defined(FAST_IPSEC)
    554    1.2    itojun 	ipsec6_delete_pcbpolicy(in6p);
    555    1.2    itojun #endif /* IPSEC */
    556   1.65  drochner 	so->so_pcb = 0;
    557    1.2    itojun 	if (in6p->in6p_options)
    558    1.2    itojun 		m_freem(in6p->in6p_options);
    559   1.96    dyoung 	if (in6p->in6p_outputopts != NULL) {
    560   1.96    dyoung 		ip6_clearpktopts(in6p->in6p_outputopts, -1);
    561    1.2    itojun 		free(in6p->in6p_outputopts, M_IP6OPT);
    562    1.2    itojun 	}
    563   1.86    dyoung 	rtcache_free(&in6p->in6p_route);
    564    1.2    itojun 	ip6_freemoptions(in6p->in6p_moptions);
    565   1.46    itojun 	s = splnet();
    566   1.56    itojun 	in6_pcbstate(in6p, IN6P_ATTACHED);
    567   1.60    itojun 	LIST_REMOVE(&in6p->in6p_head, inph_lhash);
    568   1.56    itojun 	CIRCLEQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head,
    569   1.56    itojun 	    inph_queue);
    570   1.73       tls 	pool_put(&in6pcb_pool, in6p);
    571   1.46    itojun 	splx(s);
    572   1.98      matt 	sofree(so);				/* drops the socket's lock */
    573   1.98      matt 	mutex_enter(softnet_lock);		/* reacquire it */
    574    1.2    itojun }
    575    1.2    itojun 
    576    1.2    itojun void
    577   1.87  christos in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam)
    578    1.2    itojun {
    579    1.2    itojun 	struct sockaddr_in6 *sin6;
    580    1.2    itojun 
    581   1.56    itojun 	if (in6p->in6p_af != AF_INET6)
    582   1.56    itojun 		return;
    583   1.56    itojun 
    584    1.2    itojun 	nam->m_len = sizeof(*sin6);
    585    1.2    itojun 	sin6 = mtod(nam, struct sockaddr_in6 *);
    586   1.89    dyoung 	sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0);
    587   1.69    rpaulo 	(void)sa6_recoverscope(sin6); /* XXX: should catch errors */
    588    1.2    itojun }
    589    1.2    itojun 
    590    1.2    itojun void
    591   1.87  christos in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam)
    592    1.2    itojun {
    593    1.2    itojun 	struct sockaddr_in6 *sin6;
    594    1.2    itojun 
    595   1.56    itojun 	if (in6p->in6p_af != AF_INET6)
    596   1.56    itojun 		return;
    597   1.56    itojun 
    598    1.2    itojun 	nam->m_len = sizeof(*sin6);
    599    1.2    itojun 	sin6 = mtod(nam, struct sockaddr_in6 *);
    600   1.89    dyoung 	sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0);
    601   1.69    rpaulo 	(void)sa6_recoverscope(sin6); /* XXX: should catch errors */
    602    1.2    itojun }
    603    1.2    itojun 
    604    1.2    itojun /*
    605    1.2    itojun  * Pass some notification to all connections of a protocol
    606    1.2    itojun  * associated with address dst.  The local address and/or port numbers
    607    1.2    itojun  * may be specified to limit the search.  The "usual action" will be
    608    1.2    itojun  * taken, depending on the ctlinput cmd.  The caller must filter any
    609    1.2    itojun  * cmds that are uninteresting (e.g., no error in the map).
    610    1.2    itojun  * Call the protocol specific routine (if any) to report
    611    1.2    itojun  * any errors for each matching socket.
    612    1.2    itojun  *
    613    1.6    itojun  * Must be called at splsoftnet.
    614   1.35    itojun  *
    615   1.35    itojun  * Note: src (4th arg) carries the flowlabel value on the original IPv6
    616   1.35    itojun  * header, in sin6_flowinfo member.
    617    1.2    itojun  */
    618    1.2    itojun int
    619   1.83    dyoung in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst,
    620   1.83    dyoung     u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd,
    621   1.83    dyoung     void *cmdarg, void (*notify)(struct in6pcb *, int))
    622    1.2    itojun {
    623   1.91    dyoung 	struct rtentry *rt;
    624   1.20    itojun 	struct in6pcb *in6p, *nin6p;
    625   1.83    dyoung 	struct sockaddr_in6 sa6_src;
    626   1.83    dyoung 	const struct sockaddr_in6 *sa6_dst;
    627   1.18    itojun 	u_int16_t fport = fport_arg, lport = lport_arg;
    628    1.2    itojun 	int errno;
    629    1.2    itojun 	int nmatch = 0;
    630   1.35    itojun 	u_int32_t flowinfo;
    631    1.2    itojun 
    632   1.59  christos 	if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
    633    1.2    itojun 		return 0;
    634   1.35    itojun 
    635   1.83    dyoung 	sa6_dst = (const struct sockaddr_in6 *)dst;
    636   1.35    itojun 	if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
    637    1.2    itojun 		return 0;
    638    1.2    itojun 
    639    1.2    itojun 	/*
    640   1.35    itojun 	 * note that src can be NULL when we get notify by local fragmentation.
    641   1.35    itojun 	 */
    642   1.67  christos 	sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
    643   1.35    itojun 	flowinfo = sa6_src.sin6_flowinfo;
    644   1.35    itojun 
    645   1.35    itojun 	/*
    646    1.2    itojun 	 * Redirects go to all references to the destination,
    647   1.20    itojun 	 * and use in6_rtchange to invalidate the route cache.
    648   1.20    itojun 	 * Dead host indications: also use in6_rtchange to invalidate
    649   1.20    itojun 	 * the cache, and deliver the error to all the sockets.
    650    1.2    itojun 	 * Otherwise, if we have knowledge of the local port and address,
    651    1.2    itojun 	 * deliver only to that socket.
    652    1.2    itojun 	 */
    653    1.2    itojun 	if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
    654    1.2    itojun 		fport = 0;
    655    1.2    itojun 		lport = 0;
    656  1.100    cegger 		memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr));
    657   1.20    itojun 
    658   1.35    itojun 		if (cmd != PRC_HOSTDEAD)
    659   1.35    itojun 			notify = in6_rtchange;
    660    1.2    itojun 	}
    661   1.20    itojun 
    662    1.2    itojun 	errno = inet6ctlerrmap[cmd];
    663   1.56    itojun 	for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
    664   1.56    itojun 	    in6p != (void *)&table->inpt_queue;
    665   1.56    itojun 	    in6p = nin6p) {
    666   1.56    itojun 		nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
    667   1.56    itojun 
    668   1.56    itojun 		if (in6p->in6p_af != AF_INET6)
    669   1.56    itojun 			continue;
    670   1.20    itojun 
    671   1.35    itojun 		/*
    672   1.35    itojun 		 * Under the following condition, notify of redirects
    673   1.35    itojun 		 * to the pcb, without making address matches against inpcb.
    674   1.35    itojun 		 * - redirect notification is arrived.
    675   1.35    itojun 		 * - the inpcb is unconnected.
    676   1.35    itojun 		 * - the inpcb is caching !RTF_HOST routing entry.
    677   1.35    itojun 		 * - the ICMPv6 notification is from the gateway cached in the
    678   1.35    itojun 		 *   inpcb.  i.e. ICMPv6 notification is from nexthop gateway
    679   1.35    itojun 		 *   the inpcb used very recently.
    680   1.35    itojun 		 *
    681   1.35    itojun 		 * This is to improve interaction between netbsd/openbsd
    682   1.35    itojun 		 * redirect handling code, and inpcb route cache code.
    683   1.35    itojun 		 * without the clause, !RTF_HOST routing entry (which carries
    684   1.35    itojun 		 * gateway used by inpcb right before the ICMPv6 redirect)
    685   1.35    itojun 		 * will be cached forever in unconnected inpcb.
    686   1.35    itojun 		 *
    687   1.35    itojun 		 * There still is a question regarding to what is TRT:
    688   1.35    itojun 		 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be
    689   1.35    itojun 		 *   generated on packet output.  inpcb will always cache
    690   1.35    itojun 		 *   RTF_HOST routing entry so there's no need for the clause
    691   1.35    itojun 		 *   (ICMPv6 redirect will update RTF_HOST routing entry,
    692   1.35    itojun 		 *   and inpcb is caching it already).
    693   1.35    itojun 		 *   However, bsdi/freebsd are vulnerable to local DoS attacks
    694   1.35    itojun 		 *   due to the cloned routing entries.
    695   1.35    itojun 		 * - Specwise, "destination cache" is mentioned in RFC2461.
    696   1.35    itojun 		 *   Jinmei says that it implies bsdi/freebsd behavior, itojun
    697   1.35    itojun 		 *   is not really convinced.
    698   1.35    itojun 		 * - Having hiwat/lowat on # of cloned host route (redirect/
    699   1.35    itojun 		 *   pmtud) may be a good idea.  netbsd/openbsd has it.  see
    700   1.35    itojun 		 *   icmp6_mtudisc_update().
    701   1.35    itojun 		 */
    702   1.35    itojun 		if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) &&
    703   1.35    itojun 		    IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
    704   1.94    dyoung 		    (rt = rtcache_validate(&in6p->in6p_route)) != NULL &&
    705   1.91    dyoung 		    !(rt->rt_flags & RTF_HOST)) {
    706   1.83    dyoung 			const struct sockaddr_in6 *dst6;
    707   1.35    itojun 
    708   1.83    dyoung 			dst6 = (const struct sockaddr_in6 *)
    709   1.86    dyoung 			    rtcache_getdst(&in6p->in6p_route);
    710   1.86    dyoung 			if (dst6 == NULL)
    711   1.86    dyoung 				;
    712   1.86    dyoung 			else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr,
    713   1.35    itojun 			    &sa6_dst->sin6_addr))
    714   1.35    itojun 				goto do_notify;
    715   1.20    itojun 		}
    716   1.20    itojun 
    717   1.35    itojun 		/*
    718   1.70    rpaulo 		 * If the error designates a new path MTU for a destination
    719   1.70    rpaulo 		 * and the application (associated with this socket) wanted to
    720   1.70    rpaulo 		 * know the value, notify. Note that we notify for all
    721   1.70    rpaulo 		 * disconnected sockets if the corresponding application
    722   1.70    rpaulo 		 * wanted. This is because some UDP applications keep sending
    723   1.70    rpaulo 		 * sockets disconnected.
    724   1.70    rpaulo 		 * XXX: should we avoid to notify the value to TCP sockets?
    725   1.70    rpaulo 		 */
    726   1.70    rpaulo 		if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 &&
    727   1.70    rpaulo 		    (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) ||
    728   1.70    rpaulo 		     IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) {
    729   1.83    dyoung 			ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst,
    730   1.70    rpaulo 					(u_int32_t *)cmdarg);
    731   1.70    rpaulo 		}
    732   1.70    rpaulo 
    733   1.70    rpaulo 		/*
    734   1.35    itojun 		 * Detect if we should notify the error. If no source and
    735   1.42    itojun 		 * destination ports are specified, but non-zero flowinfo and
    736   1.35    itojun 		 * local address match, notify the error. This is the case
    737   1.35    itojun 		 * when the error is delivered with an encrypted buffer
    738   1.35    itojun 		 * by ESP. Otherwise, just compare addresses and ports
    739   1.35    itojun 		 * as usual.
    740   1.35    itojun 		 */
    741   1.35    itojun 		if (lport == 0 && fport == 0 && flowinfo &&
    742   1.35    itojun 		    in6p->in6p_socket != NULL &&
    743   1.35    itojun 		    flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
    744   1.35    itojun 		    IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr))
    745   1.35    itojun 			goto do_notify;
    746   1.35    itojun 		else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
    747   1.35    itojun 					     &sa6_dst->sin6_addr) ||
    748   1.20    itojun 		    in6p->in6p_socket == 0 ||
    749   1.20    itojun 		    (lport && in6p->in6p_lport != lport) ||
    750   1.35    itojun 		    (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
    751   1.35    itojun 		     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
    752   1.35    itojun 					 &sa6_src.sin6_addr)) ||
    753   1.20    itojun 		    (fport && in6p->in6p_fport != fport))
    754    1.2    itojun 			continue;
    755   1.20    itojun 
    756   1.35    itojun 	  do_notify:
    757   1.35    itojun 		if (notify)
    758   1.35    itojun 			(*notify)(in6p, errno);
    759    1.2    itojun 		nmatch++;
    760    1.2    itojun 	}
    761    1.2    itojun 	return nmatch;
    762   1.16   thorpej }
    763   1.16   thorpej 
    764   1.16   thorpej void
    765   1.87  christos in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp)
    766   1.16   thorpej {
    767   1.16   thorpej 	struct in6pcb *in6p, *nin6p;
    768   1.37    itojun 	struct ip6_moptions *im6o;
    769   1.37    itojun 	struct in6_multi_mship *imm, *nimm;
    770   1.16   thorpej 
    771   1.56    itojun 	for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
    772   1.56    itojun 	    in6p != (void *)&table->inpt_queue;
    773   1.56    itojun 	    in6p = nin6p) {
    774   1.56    itojun 		nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
    775   1.56    itojun 		if (in6p->in6p_af != AF_INET6)
    776   1.56    itojun 			continue;
    777   1.56    itojun 
    778   1.37    itojun 		im6o = in6p->in6p_moptions;
    779   1.37    itojun 		if (im6o) {
    780   1.37    itojun 			/*
    781   1.37    itojun 			 * Unselect the outgoing interface if it is being
    782   1.37    itojun 			 * detached.
    783   1.37    itojun 			 */
    784   1.37    itojun 			if (im6o->im6o_multicast_ifp == ifp)
    785   1.37    itojun 				im6o->im6o_multicast_ifp = NULL;
    786   1.37    itojun 
    787   1.37    itojun 			/*
    788   1.37    itojun 			 * Drop multicast group membership if we joined
    789   1.37    itojun 			 * through the interface being detached.
    790   1.37    itojun 			 * XXX controversial - is it really legal for kernel
    791   1.37    itojun 			 * to force this?
    792   1.37    itojun 			 */
    793   1.37    itojun 			for (imm = im6o->im6o_memberships.lh_first;
    794   1.37    itojun 			     imm != NULL; imm = nimm) {
    795   1.37    itojun 				nimm = imm->i6mm_chain.le_next;
    796   1.37    itojun 				if (imm->i6mm_maddr->in6m_ifp == ifp) {
    797   1.37    itojun 					LIST_REMOVE(imm, i6mm_chain);
    798   1.45    itojun 					in6_leavegroup(imm);
    799   1.37    itojun 				}
    800   1.37    itojun 			}
    801   1.37    itojun 		}
    802   1.38    itojun 	}
    803   1.38    itojun }
    804   1.38    itojun 
    805   1.38    itojun void
    806   1.87  christos in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp)
    807   1.38    itojun {
    808   1.91    dyoung 	struct rtentry *rt;
    809   1.38    itojun 	struct in6pcb *in6p, *nin6p;
    810   1.38    itojun 
    811   1.56    itojun 	for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
    812   1.56    itojun 	    in6p != (void *)&table->inpt_queue;
    813   1.56    itojun 	    in6p = nin6p) {
    814   1.56    itojun 		nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
    815   1.56    itojun 		if (in6p->in6p_af != AF_INET6)
    816   1.56    itojun 			continue;
    817   1.94    dyoung 		if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL &&
    818   1.91    dyoung 		    rt->rt_ifp == ifp)
    819   1.38    itojun 			in6_rtchange(in6p, 0);
    820   1.16   thorpej 	}
    821    1.2    itojun }
    822    1.2    itojun 
    823    1.2    itojun /*
    824    1.2    itojun  * Check for alternatives when higher level complains
    825    1.2    itojun  * about service problems.  For now, invalidate cached
    826    1.2    itojun  * routing information.  If the route was created dynamically
    827    1.2    itojun  * (by a redirect), time to try a default gateway again.
    828    1.2    itojun  */
    829    1.2    itojun void
    830   1.87  christos in6_losing(struct in6pcb *in6p)
    831    1.2    itojun {
    832    1.2    itojun 	struct rtentry *rt;
    833    1.2    itojun 	struct rt_addrinfo info;
    834    1.2    itojun 
    835   1.56    itojun 	if (in6p->in6p_af != AF_INET6)
    836   1.56    itojun 		return;
    837   1.56    itojun 
    838   1.94    dyoung 	if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL)
    839   1.94    dyoung 		return;
    840   1.94    dyoung 
    841   1.94    dyoung 	memset(&info, 0, sizeof(info));
    842   1.94    dyoung 	info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route);
    843   1.94    dyoung 	info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
    844   1.94    dyoung 	info.rti_info[RTAX_NETMASK] = rt_mask(rt);
    845   1.94    dyoung 	rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
    846   1.94    dyoung 	if (rt->rt_flags & RTF_DYNAMIC) {
    847   1.94    dyoung 		(void)rtrequest(RTM_DELETE, rt_getkey(rt),
    848   1.94    dyoung 		    rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL);
    849    1.2    itojun 	}
    850   1.94    dyoung 	/*
    851   1.94    dyoung 	 * A new route can be allocated
    852   1.94    dyoung 	 * the next time output is attempted.
    853   1.94    dyoung 	 */
    854   1.94    dyoung 	rtcache_free(&in6p->in6p_route);
    855    1.2    itojun }
    856    1.2    itojun 
    857    1.2    itojun /*
    858   1.79    dyoung  * After a routing change, flush old routing.  A new route can be
    859   1.79    dyoung  * allocated the next time output is attempted.
    860    1.2    itojun  */
    861    1.2    itojun void
    862   1.75  christos in6_rtchange(struct in6pcb *in6p, int errno)
    863    1.2    itojun {
    864   1.56    itojun 	if (in6p->in6p_af != AF_INET6)
    865   1.56    itojun 		return;
    866   1.56    itojun 
    867   1.86    dyoung 	rtcache_free(&in6p->in6p_route);
    868   1.80     joerg 	/*
    869   1.80     joerg 	 * A new route can be allocated the next time
    870   1.80     joerg 	 * output is attempted.
    871   1.80     joerg 	 */
    872    1.2    itojun }
    873    1.2    itojun 
    874    1.2    itojun struct in6pcb *
    875   1.87  christos in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6,
    876   1.87  christos 	u_int lport_arg, int lookup_wildcard)
    877    1.2    itojun {
    878   1.60    itojun 	struct inpcbhead *head;
    879   1.56    itojun 	struct inpcb_hdr *inph;
    880    1.2    itojun 	struct in6pcb *in6p, *match = 0;
    881    1.2    itojun 	int matchwild = 3, wildcard;
    882   1.56    itojun 	u_int16_t lport = lport_arg;
    883   1.56    itojun 
    884   1.60    itojun 	head = IN6PCBHASH_PORT(table, lport);
    885   1.60    itojun 	LIST_FOREACH(inph, head, inph_lhash) {
    886   1.56    itojun 		in6p = (struct in6pcb *)inph;
    887   1.56    itojun 		if (in6p->in6p_af != AF_INET6)
    888   1.56    itojun 			continue;
    889    1.2    itojun 
    890    1.2    itojun 		if (in6p->in6p_lport != lport)
    891    1.2    itojun 			continue;
    892    1.2    itojun 		wildcard = 0;
    893   1.56    itojun 		if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
    894   1.56    itojun 			if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
    895    1.2    itojun 				continue;
    896   1.11    itojun 		}
    897   1.56    itojun 		if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
    898   1.56    itojun 			wildcard++;
    899   1.56    itojun 		if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) {
    900   1.56    itojun 			if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
    901   1.56    itojun 				continue;
    902   1.11    itojun 			if (!IN6_IS_ADDR_V4MAPPED(laddr6))
    903   1.11    itojun 				continue;
    904   1.56    itojun 
    905   1.56    itojun 			/* duplicate of IPv4 logic */
    906   1.56    itojun 			wildcard = 0;
    907   1.56    itojun 			if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) &&
    908   1.56    itojun 			    in6p->in6p_faddr.s6_addr32[3])
    909   1.11    itojun 				wildcard++;
    910   1.56    itojun 			if (!in6p->in6p_laddr.s6_addr32[3]) {
    911   1.56    itojun 				if (laddr6->s6_addr32[3])
    912   1.56    itojun 					wildcard++;
    913   1.56    itojun 			} else {
    914   1.56    itojun 				if (!laddr6->s6_addr32[3])
    915   1.56    itojun 					wildcard++;
    916   1.56    itojun 				else {
    917   1.56    itojun 					if (in6p->in6p_laddr.s6_addr32[3] !=
    918   1.56    itojun 					    laddr6->s6_addr32[3])
    919   1.56    itojun 						continue;
    920   1.56    itojun 				}
    921   1.56    itojun 			}
    922   1.56    itojun 		} else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
    923   1.11    itojun 			if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
    924   1.56    itojun 				if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
    925   1.11    itojun 					continue;
    926   1.56    itojun 			}
    927   1.56    itojun 			if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
    928    1.2    itojun 				wildcard++;
    929   1.56    itojun 		} else {
    930   1.56    itojun 			if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
    931   1.56    itojun 				if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
    932   1.56    itojun 					continue;
    933   1.56    itojun 			}
    934   1.56    itojun 			if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
    935    1.2    itojun 				wildcard++;
    936   1.56    itojun 			else {
    937   1.56    itojun 				if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
    938   1.56    itojun 				    laddr6))
    939   1.11    itojun 					continue;
    940   1.56    itojun 			}
    941    1.2    itojun 		}
    942   1.56    itojun 		if (wildcard && !lookup_wildcard)
    943    1.2    itojun 			continue;
    944    1.2    itojun 		if (wildcard < matchwild) {
    945    1.2    itojun 			match = in6p;
    946    1.2    itojun 			matchwild = wildcard;
    947    1.2    itojun 			if (matchwild == 0)
    948    1.2    itojun 				break;
    949    1.2    itojun 		}
    950    1.2    itojun 	}
    951   1.52    itojun 	return (match);
    952    1.2    itojun }
    953   1.56    itojun #undef continue
    954    1.2    itojun 
    955   1.55    itojun /*
    956   1.55    itojun  * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to
    957   1.55    itojun  * IPv4 mapped address.
    958   1.55    itojun  */
    959    1.2    itojun struct rtentry *
    960   1.87  christos in6_pcbrtentry(struct in6pcb *in6p)
    961    1.2    itojun {
    962   1.91    dyoung 	struct rtentry *rt;
    963   1.86    dyoung 	struct route *ro;
    964   1.90  drochner 	union {
    965   1.90  drochner 		const struct sockaddr *sa;
    966   1.90  drochner 		const struct sockaddr_in6 *sa6;
    967   1.90  drochner #ifdef INET
    968   1.90  drochner 		const struct sockaddr_in *sa4;
    969   1.90  drochner #endif
    970   1.90  drochner 	} cdst;
    971    1.2    itojun 
    972    1.2    itojun 	ro = &in6p->in6p_route;
    973    1.2    itojun 
    974   1.56    itojun 	if (in6p->in6p_af != AF_INET6)
    975   1.56    itojun 		return (NULL);
    976   1.56    itojun 
    977   1.90  drochner 	cdst.sa = rtcache_getdst(ro);
    978   1.90  drochner 	if (cdst.sa == NULL)
    979   1.86    dyoung 		;
    980   1.90  drochner #ifdef INET
    981   1.90  drochner 	else if (cdst.sa->sa_family == AF_INET) {
    982   1.90  drochner 		KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr));
    983   1.90  drochner 		if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3])
    984   1.90  drochner 			rtcache_free(ro);
    985   1.90  drochner 	}
    986   1.90  drochner #endif
    987   1.90  drochner 	else {
    988   1.90  drochner 		if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr,
    989   1.90  drochner 					&in6p->in6p_faddr))
    990   1.90  drochner 			rtcache_free(ro);
    991   1.90  drochner 	}
    992   1.93    dyoung 	if ((rt = rtcache_validate(ro)) == NULL)
    993   1.93    dyoung 		rt = rtcache_update(ro, 1);
    994   1.55    itojun #ifdef INET
    995   1.91    dyoung 	if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
    996   1.86    dyoung 		union {
    997   1.86    dyoung 			struct sockaddr		dst;
    998   1.86    dyoung 			struct sockaddr_in	dst4;
    999   1.86    dyoung 		} u;
   1000   1.86    dyoung 		struct in_addr addr;
   1001   1.55    itojun 
   1002   1.86    dyoung 		addr.s_addr = in6p->in6p_faddr.s6_addr32[3];
   1003   1.86    dyoung 
   1004   1.86    dyoung 		sockaddr_in_init(&u.dst4, &addr, 0);
   1005   1.86    dyoung 		rtcache_setdst(ro, &u.dst);
   1006   1.86    dyoung 
   1007   1.92    dyoung 		rt = rtcache_init(ro);
   1008   1.55    itojun 	} else
   1009   1.55    itojun #endif
   1010   1.91    dyoung 	if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
   1011   1.86    dyoung 		union {
   1012   1.86    dyoung 			struct sockaddr		dst;
   1013   1.86    dyoung 			struct sockaddr_in6	dst6;
   1014   1.86    dyoung 		} u;
   1015   1.86    dyoung 
   1016   1.86    dyoung 		sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0);
   1017   1.86    dyoung 		rtcache_setdst(ro, &u.dst);
   1018   1.83    dyoung 
   1019   1.92    dyoung 		rt = rtcache_init(ro);
   1020    1.2    itojun 	}
   1021   1.92    dyoung 	return rt;
   1022    1.2    itojun }
   1023    1.2    itojun 
   1024    1.2    itojun struct in6pcb *
   1025   1.83    dyoung in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6,
   1026   1.74  christos     u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg,
   1027   1.75  christos     int faith)
   1028    1.2    itojun {
   1029   1.56    itojun 	struct inpcbhead *head;
   1030   1.56    itojun 	struct inpcb_hdr *inph;
   1031    1.2    itojun 	struct in6pcb *in6p;
   1032   1.18    itojun 	u_int16_t fport = fport_arg, lport = lport_arg;
   1033    1.2    itojun 
   1034   1.56    itojun 	head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport);
   1035   1.56    itojun 	LIST_FOREACH(inph, head, inph_hash) {
   1036   1.56    itojun 		in6p = (struct in6pcb *)inph;
   1037   1.56    itojun 		if (in6p->in6p_af != AF_INET6)
   1038   1.56    itojun 			continue;
   1039   1.56    itojun 
   1040    1.2    itojun 		/* find exact match on both source and dest */
   1041    1.2    itojun 		if (in6p->in6p_fport != fport)
   1042    1.2    itojun 			continue;
   1043    1.2    itojun 		if (in6p->in6p_lport != lport)
   1044    1.2    itojun 			continue;
   1045    1.2    itojun 		if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
   1046    1.2    itojun 			continue;
   1047    1.2    itojun 		if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6))
   1048    1.2    itojun 			continue;
   1049    1.2    itojun 		if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
   1050    1.2    itojun 			continue;
   1051    1.2    itojun 		if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
   1052    1.2    itojun 			continue;
   1053   1.41    itojun 		if ((IN6_IS_ADDR_V4MAPPED(laddr6) ||
   1054   1.41    itojun 		     IN6_IS_ADDR_V4MAPPED(faddr6)) &&
   1055   1.41    itojun 		    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
   1056   1.41    itojun 			continue;
   1057    1.2    itojun 		return in6p;
   1058    1.2    itojun 	}
   1059    1.2    itojun 	return NULL;
   1060    1.2    itojun }
   1061    1.2    itojun 
   1062    1.2    itojun struct in6pcb *
   1063   1.87  christos in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6,
   1064   1.87  christos 	u_int lport_arg, int faith)
   1065    1.2    itojun {
   1066   1.56    itojun 	struct inpcbhead *head;
   1067   1.56    itojun 	struct inpcb_hdr *inph;
   1068   1.56    itojun 	struct in6pcb *in6p;
   1069   1.18    itojun 	u_int16_t lport = lport_arg;
   1070   1.62    atatat #ifdef INET
   1071   1.56    itojun 	struct in6_addr zero_mapped;
   1072   1.56    itojun #endif
   1073   1.56    itojun 
   1074   1.56    itojun 	head = IN6PCBHASH_BIND(table, laddr6, lport);
   1075   1.56    itojun 	LIST_FOREACH(inph, head, inph_hash) {
   1076   1.56    itojun 		in6p = (struct in6pcb *)inph;
   1077   1.56    itojun 		if (in6p->in6p_af != AF_INET6)
   1078   1.56    itojun 			continue;
   1079    1.2    itojun 
   1080    1.8    itojun 		if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
   1081    1.8    itojun 			continue;
   1082    1.2    itojun 		if (in6p->in6p_fport != 0)
   1083    1.2    itojun 			continue;
   1084    1.2    itojun 		if (in6p->in6p_lport != lport)
   1085    1.2    itojun 			continue;
   1086   1.56    itojun 		if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
   1087   1.56    itojun 		    (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
   1088   1.56    itojun 			continue;
   1089   1.56    itojun 		if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
   1090   1.56    itojun 			goto out;
   1091   1.56    itojun 	}
   1092   1.56    itojun #ifdef INET
   1093   1.56    itojun 	if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
   1094   1.56    itojun 		memset(&zero_mapped, 0, sizeof(zero_mapped));
   1095   1.56    itojun 		zero_mapped.s6_addr16[5] = 0xffff;
   1096   1.56    itojun 		head = IN6PCBHASH_BIND(table, &zero_mapped, lport);
   1097   1.56    itojun 		LIST_FOREACH(inph, head, inph_hash) {
   1098   1.56    itojun 			in6p = (struct in6pcb *)inph;
   1099   1.56    itojun 			if (in6p->in6p_af != AF_INET6)
   1100   1.56    itojun 				continue;
   1101   1.56    itojun 
   1102   1.56    itojun 			if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
   1103   1.56    itojun 				continue;
   1104   1.56    itojun 			if (in6p->in6p_fport != 0)
   1105   1.56    itojun 				continue;
   1106   1.56    itojun 			if (in6p->in6p_lport != lport)
   1107   1.56    itojun 				continue;
   1108   1.56    itojun 			if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
   1109   1.56    itojun 				continue;
   1110   1.56    itojun 			if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped))
   1111   1.56    itojun 				goto out;
   1112   1.11    itojun 		}
   1113    1.2    itojun 	}
   1114   1.56    itojun #endif
   1115   1.56    itojun 	head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport);
   1116   1.56    itojun 	LIST_FOREACH(inph, head, inph_hash) {
   1117   1.56    itojun 		in6p = (struct in6pcb *)inph;
   1118   1.56    itojun 		if (in6p->in6p_af != AF_INET6)
   1119   1.56    itojun 			continue;
   1120   1.56    itojun 
   1121   1.56    itojun 		if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
   1122   1.56    itojun 			continue;
   1123   1.56    itojun 		if (in6p->in6p_fport != 0)
   1124   1.56    itojun 			continue;
   1125   1.56    itojun 		if (in6p->in6p_lport != lport)
   1126   1.56    itojun 			continue;
   1127   1.56    itojun 		if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
   1128   1.56    itojun 		    (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
   1129   1.56    itojun 			continue;
   1130   1.56    itojun 		if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr))
   1131   1.56    itojun 			goto out;
   1132   1.56    itojun 	}
   1133   1.56    itojun 	return (NULL);
   1134   1.56    itojun 
   1135   1.56    itojun out:
   1136   1.56    itojun 	inph = &in6p->in6p_head;
   1137   1.56    itojun 	if (inph != LIST_FIRST(head)) {
   1138   1.56    itojun 		LIST_REMOVE(inph, inph_hash);
   1139   1.56    itojun 		LIST_INSERT_HEAD(head, inph, inph_hash);
   1140   1.56    itojun 	}
   1141   1.56    itojun 	return in6p;
   1142   1.56    itojun }
   1143   1.56    itojun 
   1144   1.56    itojun void
   1145   1.87  christos in6_pcbstate(struct in6pcb *in6p, int state)
   1146   1.56    itojun {
   1147   1.56    itojun 
   1148   1.56    itojun 	if (in6p->in6p_af != AF_INET6)
   1149   1.56    itojun 		return;
   1150   1.56    itojun 
   1151   1.56    itojun 	if (in6p->in6p_state > IN6P_ATTACHED)
   1152   1.56    itojun 		LIST_REMOVE(&in6p->in6p_head, inph_hash);
   1153   1.56    itojun 
   1154   1.56    itojun 	switch (state) {
   1155   1.56    itojun 	case IN6P_BOUND:
   1156   1.56    itojun 		LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table,
   1157   1.56    itojun 		    &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
   1158   1.56    itojun 		    inph_hash);
   1159   1.56    itojun 		break;
   1160   1.56    itojun 	case IN6P_CONNECTED:
   1161   1.56    itojun 		LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table,
   1162   1.56    itojun 		    &in6p->in6p_faddr, in6p->in6p_fport,
   1163   1.56    itojun 		    &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
   1164   1.56    itojun 		    inph_hash);
   1165   1.56    itojun 		break;
   1166   1.56    itojun 	}
   1167   1.56    itojun 
   1168   1.56    itojun 	in6p->in6p_state = state;
   1169    1.2    itojun }
   1170