379 lines
11 KiB
C
379 lines
11 KiB
C
/* $OpenBSD: in6_proto.c,v 1.114 2024/04/16 12:40:40 bluhm 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/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/if_var.h>
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#include <net/route.h>
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#include <net/rtable.h>
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#include <netinet/in.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 <netinet/tcp.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/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/ip_ipsp.h>
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#include <netinet/ip_ah.h>
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#include <netinet/ip_esp.h>
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#include <netinet/ip_ipip.h>
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#include <netinet6/in6_var.h>
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#include <netinet6/nd6.h>
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#include "gif.h"
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#if NGIF > 0
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#include <net/if_gif.h>
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#endif
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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 "pf.h"
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#if NPF > 0
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#include <netinet6/ip6_divert.h>
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#endif
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#include "etherip.h"
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#if NETHERIP > 0
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#include <net/if_etherip.h>
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#endif
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#include "gre.h"
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#if NGRE > 0
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#include <net/if_gre.h>
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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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u_char ip6_protox[IPPROTO_MAX];
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const struct protosw inet6sw[] = {
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{
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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_sysctl = ip6_sysctl
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},
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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_SPLICE,
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.pr_input = udp_input,
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.pr_ctlinput = udp6_ctlinput,
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.pr_ctloutput = ip6_ctloutput,
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.pr_usrreqs = &udp6_usrreqs,
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.pr_sysctl = udp_sysctl
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},
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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_ABRTACPTDIS|PR_SPLICE,
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.pr_input = tcp_input,
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.pr_ctlinput = tcp6_ctlinput,
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.pr_ctloutput = tcp_ctloutput,
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.pr_usrreqs = &tcp6_usrreqs,
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.pr_sysctl = tcp_sysctl
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},
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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_MPINPUT,
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.pr_input = rip6_input,
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.pr_ctlinput = rip6_ctlinput,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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.pr_sysctl = rip6_sysctl
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},
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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_ICMPV6,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = icmp6_input,
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.pr_ctlinput = rip6_ctlinput,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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.pr_init = icmp6_init,
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.pr_fasttimo = icmp6_fasttimo,
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.pr_sysctl = icmp6_sysctl
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},
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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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{
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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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{
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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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{
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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 = ah46_input,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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.pr_sysctl = ah_sysctl
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},
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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 = esp46_input,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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.pr_sysctl = esp_sysctl
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},
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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 = ipcomp46_input,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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.pr_sysctl = ipcomp_sysctl
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},
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#endif /* IPSEC */
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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_IPV4,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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#if NGIF > 0
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.pr_input = in6_gif_input,
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#else
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.pr_input = ipip_input,
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#endif
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs, /* XXX */
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},
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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_IPV6,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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#if NGIF > 0
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.pr_input = in6_gif_input,
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#else
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.pr_input = ipip_input,
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#endif
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs, /* XXX */
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},
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#if defined(MPLS) && NGIF > 0
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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_MPLS,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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#if NGIF > 0
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.pr_input = in6_gif_input,
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#else
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.pr_input = ipip_input,
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#endif
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs, /* XXX */
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},
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#endif /* MPLS */
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#if NCARP > 0
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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_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_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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.pr_sysctl = carp_sysctl
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},
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#endif /* NCARP */
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#if NPF > 0
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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_DIVERT,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &divert6_usrreqs,
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.pr_init = divert6_init,
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.pr_sysctl = divert6_sysctl
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},
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#endif /* NPF > 0 */
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#if NETHERIP > 0
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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_ETHERIP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ip6_etherip_input,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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},
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#endif /* NETHERIP */
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#if NGRE > 0
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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_GRE,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = gre_input6,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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},
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#endif /* NGRE */
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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_MPINPUT,
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.pr_input = rip6_input,
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.pr_ctloutput = rip6_ctloutput,
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.pr_usrreqs = &rip6_usrreqs,
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.pr_init = rip6_init
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}
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};
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const struct domain inet6domain = {
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.dom_family = AF_INET6,
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.dom_name = "inet6",
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.dom_protosw = inet6sw,
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.dom_protoswNPROTOSW = &inet6sw[nitems(inet6sw)],
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.dom_sasize = sizeof(struct sockaddr_in6),
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.dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr),
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.dom_maxplen = 128,
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};
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/*
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* Internet configuration info
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*/
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int ip6_forwarding = 0; /* no forwarding unless sysctl'd to enable */
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int ip6_mforwarding = 0; /* no multicast forwarding unless ... */
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int ip6_multipath = 0; /* no using multipath routes unless ... */
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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_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 = 10; /* appropriate? */
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int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
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int ip6_dad_pending; /* number of currently running DADs */
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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_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
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int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */
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int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */
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time_t ip6_log_time = (time_t)0L;
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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_redirtimeout = 10 * 60; /* 10 minutes */
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int icmp6errppslim = 100; /* 100pps */
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int ip6_mtudisc_timeout = IPMTUDISCTIMEOUT;
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