456 lines
13 KiB
C
456 lines
13 KiB
C
/* $NetBSD: in6_proto.c,v 1.77 2007/05/06 02:56:37 dyoung Exp $ */
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/* $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in_proto.c 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: in6_proto.c,v 1.77 2007/05/06 02:56:37 dyoung Exp $");
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#include "opt_inet.h"
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#include "opt_ipsec.h"
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#include "opt_iso.h"
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/protosw.h>
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#include <sys/kernel.h>
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#include <sys/domain.h>
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#include <sys/mbuf.h>
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#include <net/if.h>
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#include <net/radix.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip_encap.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/in_pcb.h>
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet/icmp6.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_fsm.h>
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#include <netinet/tcp_seq.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <netinet/tcpip.h>
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#include <netinet/tcp_debug.h>
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#include <netinet6/udp6.h>
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#include <netinet6/udp6_var.h>
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#include <netinet6/pim6_var.h>
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#include <netinet6/nd6.h>
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#ifdef IPSEC
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#include <netinet6/ipsec.h>
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#include <netinet6/ah.h>
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#ifdef IPSEC_ESP
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#include <netinet6/esp.h>
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#endif
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#include <netinet6/ipcomp.h>
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#endif /* IPSEC */
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#ifdef FAST_IPSEC
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#include <netipsec/ipsec.h>
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#include <netipsec/ipsec6.h>
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#include <netipsec/key.h>
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#endif /* FAST_IPSEC */
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#include "carp.h"
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#if NCARP > 0
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#include <netinet/ip_carp.h>
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#endif
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#include "etherip.h"
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#if NETHERIP > 1
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#include <netinet6/ip6_etherip.h>
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#endif
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#include <netinet6/ip6protosw.h>
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#include <net/net_osdep.h>
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#ifndef offsetof /* XXX */
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#define offsetof(type, member) ((size_t)(&((type *)0)->member))
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#endif
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/*
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* TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
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*/
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DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */
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const struct ip6protosw inet6sw[] = {
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{ .pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_IPV6,
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.pr_init = ip6_init,
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.pr_slowtimo = frag6_slowtimo,
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.pr_drain = frag6_drain,
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},
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{ .pr_type = SOCK_DGRAM,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_UDP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF,
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.pr_input = udp6_input,
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.pr_ctlinput = udp6_ctlinput,
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.pr_ctloutput = ip6_ctloutput,
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.pr_usrreq = udp6_usrreq,
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.pr_init = udp6_init,
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},
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{ .pr_type = SOCK_STREAM,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_TCP,
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.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF,
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.pr_input = tcp6_input,
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.pr_ctlinput = tcp6_ctlinput,
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.pr_ctloutput = tcp_ctloutput,
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.pr_usrreq = tcp_usrreq,
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#ifndef INET /* don't call initialization and timeout routines twice */
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.pr_init = tcp_init,
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.pr_slowtimo = tcp_slowtimo,
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.pr_drain = tcp_drain,
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#endif
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_RAW,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF,
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.pr_input = rip6_input,
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.pr_output = rip6_output,
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.pr_ctlinput = rip6_ctlinput,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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},
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#ifdef GATEWAY
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{ .pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_IPV6,
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.pr_slowtimo = ip6flow_slowtimo,
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},
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#endif /* GATEWAY */
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_ICMPV6,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = icmp6_input,
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.pr_output = rip6_output,
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.pr_ctlinput = rip6_ctlinput,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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.pr_init = icmp6_init,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_DSTOPTS,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = dest6_input,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_ROUTING,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = route6_input,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_FRAGMENT,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = frag6_input,
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},
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#ifdef IPSEC
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_AH,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ah6_input,
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.pr_ctlinput = ah6_ctlinput,
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},
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#ifdef IPSEC_ESP
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_ESP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = esp6_input,
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.pr_ctlinput = esp6_ctlinput,
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},
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#endif
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_IPCOMP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ipcomp6_input,
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},
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#endif /* IPSEC */
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#ifdef FAST_IPSEC
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_AH,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ipsec6_common_input,
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.pr_ctlinput = ah6_ctlinput,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_ESP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ipsec6_common_input,
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.pr_ctlinput = esp6_ctlinput,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_IPCOMP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ipsec6_common_input,
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},
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#endif /* FAST_IPSEC */
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#ifdef INET
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_IPV4,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap6_input,
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.pr_output = rip6_output,
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.pr_ctlinput = encap6_ctlinput,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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.pr_init = encap_init,
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},
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#endif
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_IPV6,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap6_input,
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.pr_output = rip6_output,
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.pr_ctlinput = encap6_ctlinput,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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.pr_init = encap_init,
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},
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#if NETHERIP > 1
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_ETHERIP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = ip6_etherip_input,
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.pr_output = rip6_output,
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.pr_ctlinput = rip6_ctlinput,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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},
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#endif
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#if NCARP > 0
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_CARP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = carp6_proto_input,
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.pr_output = rip6_output,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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},
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#endif /* NCARP */
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#ifdef ISO
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_EON,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap6_input,
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.pr_output = rip6_output,
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.pr_ctlinput = encap6_ctlinput,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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/*XXX*/
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.pr_init = encap_init,
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},
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#endif
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_protocol = IPPROTO_PIM,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = pim6_input,
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.pr_output = rip6_output,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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},
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/* raw wildcard */
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inet6domain,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = rip6_input,
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.pr_output = rip6_output,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreq = rip6_usrreq,
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.pr_init = rip6_init,
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},
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};
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POOL_INIT(sockaddr_in6_pool, sizeof(struct sockaddr_in6), 0, 0, 0,
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"sockaddr_in6_pool", NULL, IPL_NET);
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struct domain inet6domain = {
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.dom_family = AF_INET6, .dom_name = "internet6",
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.dom_init = NULL, .dom_externalize = NULL, .dom_dispose = NULL,
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.dom_protosw = (const struct protosw *)inet6sw,
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.dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])],
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.dom_rtattach = rn_inithead,
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.dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3,
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.dom_maxrtkey = sizeof(struct sockaddr_in6),
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.dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach,
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.dom_ifqueues = { &ip6intrq, NULL },
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.dom_link = { NULL },
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.dom_mowner = MOWNER_INIT("",""),
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.dom_sa_pool = &sockaddr_in6_pool,
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.dom_sa_len = sizeof(struct sockaddr_in6),
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.dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr),
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.dom_sa_cmplen = sizeof(struct in6_addr),
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.dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache)
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};
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int
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sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa)
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{
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uint_fast8_t len;
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const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr),
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addrend = addrofs + sizeof(struct in6_addr);
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int rc;
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const struct sockaddr_in6 *lsin6, *rsin6;
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lsin6 = satocsin6(lsa);
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rsin6 = satocsin6(rsa);
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len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len));
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if (len > addrofs &&
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(rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr,
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len - addrofs)) != 0)
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return rc;
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return lsin6->sin6_len - rsin6->sin6_len;
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}
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/*
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* Internet configuration info
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*/
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#ifndef IPV6FORWARDING
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#ifdef GATEWAY6
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#define IPV6FORWARDING 1 /* forward IP6 packets not for us */
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#else
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#define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
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#endif /* GATEWAY6 */
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#endif /* !IPV6FORWARDING */
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int ip6_forwarding = IPV6FORWARDING; /* act as router? */
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int ip6_sendredirects = 1;
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int ip6_defhlim = IPV6_DEFHLIM;
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int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
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int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
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int ip6_maxfragpackets = 200;
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int ip6_maxfrags = 200;
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int ip6_log_interval = 5;
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int ip6_hdrnestlimit = 50; /* appropriate? */
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int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
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int ip6_auto_flowlabel = 1;
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int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
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int ip6_rr_prune = 5; /* router renumbering prefix
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* walk list every 5 sec. */
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int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
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int ip6_v6only = 1;
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int ip6_keepfaith = 0;
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time_t ip6_log_time = (time_t)0L;
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/* icmp6 */
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/*
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* BSDI4 defines these variables in in_proto.c...
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* XXX: what if we don't define INET? Should we define pmtu6_expire
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* or so? (jinmei@kame.net 19990310)
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*/
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int pmtu_expire = 60*10;
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/* raw IP6 parameters */
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/*
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* Nominal space allocated to a raw ip socket.
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*/
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#define RIPV6SNDQ 8192
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#define RIPV6RCVQ 8192
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u_long rip6_sendspace = RIPV6SNDQ;
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u_long rip6_recvspace = RIPV6RCVQ;
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/* ICMPV6 parameters */
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int icmp6_rediraccept = 1; /* accept and process redirects */
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int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
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int icmp6errppslim = 100; /* 100pps */
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int icmp6_nodeinfo = 1; /* enable/disable NI response */
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/* UDP on IP6 parameters */
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int udp6_sendspace = 9216; /* really max datagram size */
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int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
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/* 40 1K datagrams */
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