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/* $OpenBSD: in6_proto.c,v 1.65 2013/03/14 11:18:37 mpi Exp $ */
/* $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 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. 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/protosw.h>
#include <sys/kernel.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <net/if.h>
#include <net/radix.h>
#ifndef SMALL_KERNEL
#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.h>
#include <netinet/ip_var.h>
#include <netinet/in_pcb.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/icmp6.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/ip_ipsp.h>
#include <netinet/ip_ah.h>
#include <netinet/ip_esp.h>
#include <netinet/ip_ipip.h>
#ifdef MROUTING
#include <netinet6/pim6_var.h>
#endif
#include <netinet6/nd6.h>
#include <netinet6/ip6protosw.h>
#include "gif.h"
#if NGIF > 0
#include <netinet/ip_ether.h>
#include <netinet6/in6_gif.h>
#endif
#include "carp.h"
#if NCARP > 0
#include <netinet/ip_carp.h>
#endif
#include "pf.h"
#if NPF > 0
#include <netinet6/ip6_divert.h>
#endif
/*
* TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
*/
extern struct domain inet6domain;
struct ip6protosw inet6sw[] = {
{ 0, &inet6domain, IPPROTO_IPV6, 0,
0, 0, 0, 0,
0,
ip6_init, 0, frag6_slowtimo, frag6_drain,
ip6_sysctl,
},
{ SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR|PR_SPLICE,
udp6_input, 0, udp6_ctlinput, ip6_ctloutput,
udp_usrreq, 0,
0, 0, 0,
udp_sysctl,
},
{ SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS|PR_SPLICE,
tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput,
tcp_usrreq,
#ifdef INET /* don't call initialization and timeout routines twice */
0, 0, 0, 0,
#else
tcp_init, tcp_fasttimo, tcp_slowtimo, 0,
#endif
tcp_sysctl,
},
{ SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR,
rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
rip6_usrreq,
0, 0, 0, 0, rip6_sysctl
},
{ SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR,
icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
rip6_usrreq,
icmp6_init, icmp6_fasttimo, 0, 0,
icmp6_sysctl,
},
{ SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
dest6_input, 0, 0, 0,
0,
0, 0, 0, 0,
},
{ SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
route6_input, 0, 0, 0,
0,
0, 0, 0, 0,
},
{ SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
frag6_input, 0, 0, 0,
0,
0, 0, 0, 0,
},
#ifdef IPSEC
{ SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
ah6_input, 0, 0, 0,
0,
0, 0, 0, 0,
ah_sysctl,
},
{ SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
esp6_input, 0, 0, 0,
0,
0, 0, 0, 0,
esp_sysctl,
},
{ SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
ipcomp6_input, 0, 0, 0,
0,
0, 0, 0, 0,
ipcomp_sysctl,
},
#endif /* IPSEC */
#if NGIF > 0
{ SOCK_RAW, &inet6domain, IPPROTO_ETHERIP,PR_ATOMIC|PR_ADDR,
etherip_input6, rip6_output, 0, rip6_ctloutput,
rip6_usrreq,
0, 0, 0, 0, etherip_sysctl
},
{ SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
in6_gif_input, rip6_output, 0, rip6_ctloutput,
rip6_usrreq, /* XXX */
0, 0, 0, 0,
},
#ifdef INET
{ SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR,
in6_gif_input, rip6_output, 0, rip6_ctloutput,
rip6_usrreq, /* XXX */
0, 0, 0, 0,
},
#endif /* INET */
#else /* NGIF */
{ SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
ip4_input6, rip6_output, 0, rip6_ctloutput,
rip6_usrreq, /* XXX */
0, 0, 0, 0, ipip_sysctl
},
#ifdef INET
{ SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR,
ip4_input6, rip6_output, 0, rip6_ctloutput,
rip6_usrreq, /* XXX */
0, 0, 0, 0,
},
#endif /* INET */
#endif /* GIF */
#ifdef MROUTING
{ SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR,
pim6_input, rip6_output, 0, rip6_ctloutput,
rip6_usrreq,
0, 0, 0, 0, pim6_sysctl
},
#endif
#if NCARP > 0
{ SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR,
carp6_proto_input, rip6_output, 0, rip6_ctloutput,
rip6_usrreq,
0, 0, 0, 0, carp_sysctl
},
#endif /* NCARP */
#if NPF > 0
{ SOCK_RAW, &inet6domain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR,
divert6_input, 0, 0, rip6_ctloutput,
divert6_usrreq,
divert6_init, 0, 0, 0, divert6_sysctl
},
#endif /* NPF > 0 */
/* raw wildcard */
{ SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR,
rip6_input, rip6_output, 0, rip6_ctloutput,
rip6_usrreq, rip6_init,
0, 0, 0,
},
};
struct domain inet6domain =
{ AF_INET6, "internet6", 0, 0, 0,
(struct protosw *)inet6sw,
(struct protosw *)&inet6sw[nitems(inet6sw)], 0,
#ifndef SMALL_KERNEL
rn_mpath_inithead,
#else
rn_inithead,
#endif
offsetof(struct sockaddr_in6, sin6_addr) << 3,
sizeof(struct sockaddr_in6),
in6_domifattach, in6_domifdetach, };
/*
* Internet configuration info
*/
int ip6_forwarding = 0; /* no forwarding unless sysctl'd to enable */
int ip6_mforwarding = 0; /* no multicast forwarding unless ... */
int ip6_multipath = 0; /* no using multipath routes unless ... */
int ip6_sendredirects = 1;
int ip6_defhlim = IPV6_DEFHLIM;
int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
int ip6_accept_rtadv = 0; /* enabling forwarding and rtadv concurrently is dangerous */
int ip6_maxfragpackets = 200;
int ip6_maxfrags = 200;
int ip6_log_interval = 5;
int ip6_hdrnestlimit = 10; /* appropriate? */
int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
int ip6_dad_pending; /* number of currently running DADs */
int ip6_auto_flowlabel = 1;
int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
int ip6_rr_prune = 5; /* router renumbering prefix
* walk list every 5 sec. */
int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
const int ip6_v6only = 1;
int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */
int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */
int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */
int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */
time_t ip6_log_time = (time_t)0L;
/* icmp6 */
/*
* BSDI4 defines these variables in in_proto.c...
* XXX: what if we don't define INET? Should we define pmtu6_expire
* or so? (jinmei@kame.net 19990310)
*/
int pmtu_expire = 60*10;
/* raw IP6 parameters */
/*
* Nominal space allocated to a raw ip socket.
*/
#define RIPV6SNDQ 8192
#define RIPV6RCVQ 8192
u_long rip6_sendspace = RIPV6SNDQ;
u_long rip6_recvspace = RIPV6RCVQ;
/* ICMPV6 parameters */
int icmp6_rediraccept = 0; /* don't process redirects by default */
int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
int icmp6errppslim = 100; /* 100pps */
int icmp6_nodeinfo = 1; /* enable/disable NI response */
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