in6_proto.c

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//==========================================================================
//
//      src/sys/netinet6/in6_proto.c
//
//==========================================================================
//####BSDCOPYRIGHTBEGIN####
//
// -------------------------------------------
//
// Portions of this software may have been derived from OpenBSD, 
// FreeBSD or other sources, and are covered by the appropriate
// copyright disclaimers included herein.
//
// Portions created by Red Hat are
// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
//
// -------------------------------------------
//
//####BSDCOPYRIGHTEND####
//==========================================================================

/*	$KAME: in6_proto.c,v 1.111 2001/12/21 03:32:34 itojun Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)in_proto.c	8.1 (Berkeley) 6/10/93
 */

#include <sys/param.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>

#include <net/if.h>
#include <net/radix.h>
#ifdef RADIX_ART
#include <net/radix_art.h>
#elif defined(RADIX_MPATH)
#include <net/radix_mpath.h>
#endif
#include <net/route.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip_encap.h>
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || (defined(__NetBSD__) && !defined(TCP6)) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#endif
#if (defined(__NetBSD__) && !defined(TCP6)) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
#include <netinet/in_pcb.h>
#endif
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/icmp6.h>
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined(__OpenBSD__) && !(defined(__bsdi__) && _BSDI_VERSION >= 199802)
#include <netinet6/in6_pcb.h>
#endif

#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#if (defined(__FreeBSD__) && __FreeBSD__ >= 4)
#include <netinet6/tcp6_var.h>
#endif
#else
#if defined(__NetBSD__) && !defined(TCP6)
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcpip.h>
#include <netinet/tcp_debug.h>
#else
#include <netinet6/tcp6.h>
#include <netinet6/tcp6_fsm.h>
#include <netinet6/tcp6_seq.h>
#include <netinet6/tcp6_timer.h>
#include <netinet6/tcp6_var.h>
#endif
#endif

#ifdef __FreeBSD__
#include <netinet6/raw_ip6.h>
#endif

#if !defined(__OpenBSD__) && !(defined(__bsdi__) && _BSDI_VERSION >= 199802)
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 4)
#include <netinet6/udp6.h>
#endif
#include <netinet6/udp6_var.h>
#endif

#include <netinet6/pim6_var.h>

#include <netinet6/nd6.h>

#ifdef IPSEC
#ifdef __OpenBSD__
#include <netinet/ip_ipsp.h>
#include <netinet/ip_ah.h>
#include <netinet/ip_esp.h>
#include <netinet/ip_ipip.h>
#else
#include <netinet6/ipsec.h>
#include <netinet6/ah.h>
#ifdef IPSEC_ESP
#include <netinet6/esp.h>
#endif
#include <netinet6/ipcomp.h>
#endif
#endif /* IPSEC */

#include <netinet6/ip6protosw.h>

#ifdef MIP6
#include <netinet6/mip6.h>
#endif /* MIP6 */

#ifndef offsetof
#define	offsetof(type, member)	((size_t)(&((type *)0)->member))
#endif

/*
 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
 */

extern	struct domain inet6domain;
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
static struct pr_usrreqs nousrreqs;
#endif

#ifndef __NetBSD__
#define PR_LISTEN	0
#endif
#if !defined(__NetBSD__) && !defined(__OpenBSD__)
#define PR_ABRTACPTDIS	0
#endif
#ifdef __OpenBSD__
#define PR_LASTHDR	0
#endif

struct ip6protosw inet6sw[] = {
{ 0,		&inet6domain,	IPPROTO_IPV6,	0,
  0,		0,		0,		0,
  0,
  ip6_init,	0,		frag6_slowtimo,	frag6_drain,
#ifndef __FreeBSD__
  ip6_sysctl,
#else
# if __FreeBSD__ >= 3
  &nousrreqs,
# endif
#endif
},
{ SOCK_DGRAM,	&inet6domain,	IPPROTO_UDP,	PR_ATOMIC|PR_ADDR,
  udp6_input,	0,		udp6_ctlinput,	ip6_ctloutput,
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
 0, 0,
#elif defined(HAVE_NRL_INPCB)
 udp6_usrreq,	0,
#else
 udp6_usrreq,	udp6_init,
#endif
  0,		0,		0,
#ifndef __FreeBSD__
#ifdef HAVE_NRL_INPCB
  udp_sysctl,
#else
  udp6_sysctl,
#endif
#else
# if __FreeBSD__ >= 3
  &udp6_usrreqs,
# endif
#endif
},
#ifdef TCP6
{ SOCK_STREAM,	&inet6domain,	IPPROTO_TCP,	PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS,
  tcp6_input,	0,		tcp6_ctlinput,	tcp6_ctloutput,
  tcp6_usrreq,
  tcp6_init,	tcp6_fasttimo,	tcp6_slowtimo,	tcp6_drain,
#ifndef __FreeBSD__
  tcp6_sysctl,
#else
# if __FreeBSD__ >= 3
  &tcp6_usrreqs,
# endif
#endif
},
#else
{ SOCK_STREAM,	&inet6domain,	IPPROTO_TCP,	PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
  tcp6_input,	0,		tcp6_ctlinput,	tcp_ctloutput,
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
  0,
#elif defined(HAVE_NRL_INPCB)
  tcp6_usrreq,
#else
  tcp_usrreq,
#endif
#ifdef INET	/* don't call initialization and timeout routines twice */
  0,		0,		0,		tcp_drain,
#else
  tcp_init,	tcp_fasttimo,	tcp_slowtimo,	tcp_drain,
#endif
#ifndef __FreeBSD__
  tcp_sysctl,
#else
# if __FreeBSD__ >= 3
  &tcp6_usrreqs,
# endif
#endif
},
#endif /* TCP6 */
{ SOCK_RAW,	&inet6domain,	IPPROTO_RAW,	PR_ATOMIC|PR_ADDR,
  rip6_input,	rip6_output,    rip6_ctlinput,	rip6_ctloutput,
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
  0,
#else
  rip6_usrreq,
#endif
  0,		0,		0,		0,
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
  &rip6_usrreqs
#endif
},
{ SOCK_RAW,	&inet6domain,	IPPROTO_ICMPV6,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  icmp6_input,	rip6_output,	rip6_ctlinput,	rip6_ctloutput,
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
  0,
#else
  rip6_usrreq,
#endif
  icmp6_init,	icmp6_fasttimo,	0,		0,
#ifndef __FreeBSD__
  icmp6_sysctl,
#else
# if __FreeBSD__ >= 3
  &rip6_usrreqs
# endif
#endif
},
{ SOCK_RAW,	&inet6domain,	IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
  dest6_input,	0,	 	0,		0,
  0,	
  0,		0,		0,		0,
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
  &nousrreqs
#endif
},
{ SOCK_RAW,	&inet6domain,	IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
  route6_input,	0,	 	0,		0,
  0,	
  0,		0,		0,		0,
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
  &nousrreqs
#endif
},
{ SOCK_RAW,	&inet6domain,	IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
  frag6_input,	0,	 	0,		0,
  0,	
  0,		0,		0,		0,
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
  &nousrreqs
#endif
},
#ifdef IPSEC
{ SOCK_RAW,	&inet6domain,	IPPROTO_AH,	PR_ATOMIC|PR_ADDR,
  ah6_input,	0,
#ifdef __NetBSD__
  ah6_ctlinput,
#else
  0,
#endif
  0,
  0,	
  0,		0,		0,		0,
#ifdef __OpenBSD__
  ah_sysctl,
#elif !defined(__FreeBSD__)
  ipsec6_sysctl,
#else
# if __FreeBSD__ >= 3
  &nousrreqs,
# endif
#endif
},
#ifdef IPSEC_ESP
{ SOCK_RAW,	&inet6domain,	IPPROTO_ESP,	PR_ATOMIC|PR_ADDR,
  esp6_input,	0,
  esp6_ctlinput,
  0,
  0,
  0,		0,		0,		0,
#ifdef __OpenBSD__
  esp_sysctl,
#elif !defined(__FreeBSD__)
  ipsec6_sysctl,
#else
# if __FreeBSD__ >= 3
  &nousrreqs,
# endif
#endif
},
#endif
#ifndef __OpenBSD__
{ SOCK_RAW,	&inet6domain,	IPPROTO_IPCOMP,	PR_ATOMIC|PR_ADDR,
  ipcomp6_input, 0,	 	0,		0,
  0,	
  0,		0,		0,		0,
#ifndef __FreeBSD__
  ipsec6_sysctl,
#else
# if __FreeBSD__ >= 3
  &nousrreqs,
# endif
#endif
},