420 lines
13 KiB
C
420 lines
13 KiB
C
/* $NetBSD: in6_proto.c,v 1.19 2000/07/28 04:06:59 itojun Exp $ */
|
|
/* $KAME: in6_proto.c,v 1.64 2000/06/20 16:20:27 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 "opt_inet.h"
|
|
#include "opt_ipsec.h"
|
|
|
|
#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>
|
|
#include <net/route.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/in_var.h>
|
|
#include <netinet/ip_encap.h>
|
|
#ifndef TCP6
|
|
#include <netinet/ip.h>
|
|
#include <netinet/ip_var.h>
|
|
#endif
|
|
#ifndef TCP6
|
|
#include <netinet/in_pcb.h>
|
|
#endif
|
|
#include <netinet/ip6.h>
|
|
#include <netinet6/ip6_var.h>
|
|
#include <netinet/icmp6.h>
|
|
#include <netinet6/in6_pcb.h>
|
|
|
|
#ifndef 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
|
|
|
|
#include <netinet6/udp6.h>
|
|
#include <netinet6/udp6_var.h>
|
|
|
|
#include <netinet6/pim6_var.h>
|
|
|
|
#include <netinet6/nd6.h>
|
|
|
|
|
|
#ifdef IPSEC
|
|
#include <netinet6/ipsec.h>
|
|
#include <netinet6/ah.h>
|
|
#ifdef IPSEC_ESP
|
|
#include <netinet6/esp.h>
|
|
#endif
|
|
#include <netinet6/ipcomp.h>
|
|
#endif /*IPSEC*/
|
|
|
|
#include <netinet6/ip6protosw.h>
|
|
|
|
#include "gif.h"
|
|
#if NGIF > 0
|
|
#include <netinet6/in6_gif.h>
|
|
#endif
|
|
|
|
#include <net/net_osdep.h>
|
|
|
|
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
|
|
|
|
/*
|
|
* 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,
|
|
udp6_input, 0, udp6_ctlinput, ip6_ctloutput,
|
|
udp6_usrreq, udp6_init,
|
|
0, 0, 0,
|
|
udp6_sysctl,
|
|
},
|
|
#ifdef TCP6
|
|
{ SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
|
|
tcp6_input, 0, tcp6_ctlinput, tcp6_ctloutput,
|
|
tcp6_usrreq,
|
|
tcp6_init, tcp6_fasttimo, tcp6_slowtimo, tcp6_drain,
|
|
tcp6_sysctl,
|
|
},
|
|
#else
|
|
{ SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
|
|
tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput,
|
|
tcp_usrreq,
|
|
#ifdef INET /* don't call timeout routines twice */
|
|
tcp_init, 0, 0, tcp_drain,
|
|
#else
|
|
tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain,
|
|
#endif
|
|
tcp_sysctl,
|
|
},
|
|
#endif /*TCP6*/
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC | PR_ADDR,
|
|
rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
|
|
rip6_usrreq,
|
|
0, 0, 0, 0,
|
|
},
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC | PR_ADDR,
|
|
icmp6_input, rip6_output, 0, 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,
|
|
ipsec6_sysctl,
|
|
},
|
|
#ifdef IPSEC_ESP
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
|
|
esp6_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
ipsec6_sysctl,
|
|
},
|
|
#endif
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
|
|
ipcomp6_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
ipsec6_sysctl,
|
|
},
|
|
#endif /* IPSEC */
|
|
#ifdef INET
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR,
|
|
encap6_input, rip6_output, 0, rip6_ctloutput,
|
|
rip6_usrreq,
|
|
0, 0, 0, 0,
|
|
},
|
|
#endif
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
|
|
encap6_input, rip6_output, 0, rip6_ctloutput,
|
|
rip6_usrreq,
|
|
#ifndef INET6
|
|
0, 0, 0, 0,
|
|
#else
|
|
encap_init, 0, 0, 0,
|
|
#endif
|
|
},
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR,
|
|
pim6_input, rip6_output, 0, rip6_ctloutput,
|
|
rip6_usrreq,
|
|
0, 0, 0, 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,
|
|
},
|
|
};
|
|
|
|
#if NGIF > 0
|
|
struct ip6protosw in6_gif_protosw =
|
|
{ SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR,
|
|
in6_gif_input, rip6_output, 0, rip6_ctloutput,
|
|
rip6_usrreq,
|
|
0, 0, 0, 0,
|
|
};
|
|
#endif /*NGIF*/
|
|
|
|
struct domain inet6domain =
|
|
{ AF_INET6, "internet6", 0, 0, 0,
|
|
(struct protosw *)inet6sw,
|
|
(struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0,
|
|
rn_inithead,
|
|
offsetof(struct sockaddr_in6, sin6_addr) << 3,
|
|
sizeof(struct sockaddr_in6) };
|
|
|
|
/*
|
|
* Internet configuration info
|
|
*/
|
|
#ifndef IPV6FORWARDING
|
|
#ifdef GATEWAY6
|
|
#define IPV6FORWARDING 1 /* forward IP6 packets not for us */
|
|
#else
|
|
#define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
|
|
#endif /* GATEWAY6 */
|
|
#endif /* !IPV6FORWARDING */
|
|
|
|
#ifndef IPV6_SENDREDIRECTS
|
|
#define IPV6_SENDREDIRECTS 1
|
|
#endif
|
|
|
|
int ip6_forwarding = IPV6FORWARDING; /* act as router? */
|
|
int ip6_sendredirects = IPV6_SENDREDIRECTS;
|
|
int ip6_defhlim = IPV6_DEFHLIM;
|
|
int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
|
|
int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
|
|
int ip6_maxfragpackets = 200;
|
|
int ip6_log_interval = 5;
|
|
int ip6_hdrnestlimit = 50; /* appropriate? */
|
|
int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
|
|
u_int32_t ip6_flow_seq;
|
|
int ip6_auto_flowlabel = 1;
|
|
#if NGIF > 0
|
|
int ip6_gif_hlim = GIF_HLIM;
|
|
#else
|
|
int ip6_gif_hlim = 0;
|
|
#endif
|
|
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. */
|
|
#ifndef INET6_BINDV6ONLY
|
|
int ip6_bindv6only = 1;
|
|
#endif
|
|
|
|
u_int32_t ip6_id = 0UL;
|
|
int ip6_keepfaith = 0;
|
|
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;
|
|
int pmtu_probe = 60*2;
|
|
|
|
/* 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 = 1; /* accept and process redirects */
|
|
int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
|
|
int icmp6errppslim = 100; /* 100pps */
|
|
int icmp6_nodeinfo = 1; /* enable/disable NI response */
|
|
|
|
#ifdef TCP6
|
|
/* TCP on IP6 parameters */
|
|
int tcp6_sendspace = 1024 * 8;
|
|
int tcp6_recvspace = 1024 * 8;
|
|
int tcp6_mssdflt = TCP6_MSS;
|
|
int tcp6_rttdflt = TCP6TV_SRTTDFLT / PR_SLOWHZ;
|
|
int tcp6_do_rfc1323 = 1;
|
|
int tcp6_conntimeo = TCP6TV_KEEP_INIT; /* initial connection timeout */
|
|
int tcp6_43maxseg = 0;
|
|
int tcp6_pmtu = 0;
|
|
|
|
/*
|
|
* Parameters for keepalive option.
|
|
* Connections for which SO_KEEPALIVE is set will be probed
|
|
* after being idle for a time of tcp6_keepidle (in units of PR_SLOWHZ).
|
|
* Starting at that time, the connection is probed at intervals
|
|
* of tcp6_keepintvl (same units) until a response is received
|
|
* or until tcp6_keepcnt probes have been made, at which time
|
|
* the connection is dropped. Note that a tcp6_keepidle value
|
|
* under 2 hours is nonconformant with RFC-1122, Internet Host Requirements.
|
|
*/
|
|
int tcp6_keepidle = TCP6TV_KEEP_IDLE; /* time before probing idle */
|
|
int tcp6_keepintvl = TCP6TV_KEEPINTVL; /* interval betwn idle probes */
|
|
int tcp6_keepcnt = TCP6TV_KEEPCNT; /* max idle probes */
|
|
int tcp6_maxpersistidle = TCP6TV_KEEP_IDLE; /* max idle time in persist */
|
|
|
|
#ifndef INET_SERVER
|
|
#define TCP6_LISTEN_HASH_SIZE 17
|
|
#define TCP6_CONN_HASH_SIZE 97
|
|
#define TCP6_SYN_HASH_SIZE 293
|
|
#define TCP6_SYN_BUCKET_SIZE 35
|
|
#else
|
|
#define TCP6_LISTEN_HASH_SIZE 97
|
|
#define TCP6_CONN_HASH_SIZE 9973
|
|
#define TCP6_SYN_HASH_SIZE 997
|
|
#define TCP6_SYN_BUCKET_SIZE 35
|
|
#endif
|
|
int tcp6_listen_hash_size = TCP6_LISTEN_HASH_SIZE;
|
|
int tcp6_conn_hash_size = TCP6_CONN_HASH_SIZE;
|
|
struct tcp6_hash_list tcp6_listen_hash[TCP6_LISTEN_HASH_SIZE],
|
|
tcp6_conn_hash[TCP6_CONN_HASH_SIZE];
|
|
|
|
int tcp6_syn_cache_size = TCP6_SYN_HASH_SIZE;
|
|
int tcp6_syn_cache_limit = TCP6_SYN_HASH_SIZE*TCP6_SYN_BUCKET_SIZE;
|
|
int tcp6_syn_bucket_limit = 3*TCP6_SYN_BUCKET_SIZE;
|
|
struct syn_cache_head6 tcp6_syn_cache[TCP6_SYN_HASH_SIZE];
|
|
struct syn_cache_head6 *tcp6_syn_cache_first;
|
|
int tcp6_syn_cache_interval = 8; /* runs timer every 4 seconds */
|
|
int tcp6_syn_cache_timeo = TCP6TV_KEEP_INIT;
|
|
|
|
/*
|
|
* Parameters for computing a desirable data segment size
|
|
* given an upper bound (either interface MTU, or peer's MSS option)_.
|
|
* As applications tend to use a buffer size that is a multiple
|
|
* of kilobytes, try for something that divides evenly. However,
|
|
* do not round down too much.
|
|
*
|
|
* Round segment size down to a multiple of TCP6_ROUNDSIZE if this
|
|
* does not result in lowering by more than (size/TCP6_ROUNDFRAC).
|
|
* For example, round 536 to 512. Older versions of the system
|
|
* effectively used MCLBYTES (1K or 2K) as TCP6_ROUNDSIZE, with
|
|
* a value of 1 for TCP6_ROUNDFRAC (eliminating its effect).
|
|
* We round to a multiple of 256 for SLIP.
|
|
*/
|
|
#ifndef TCP6_ROUNDSIZE
|
|
#define TCP6_ROUNDSIZE 256 /* round to multiple of 256 */
|
|
#endif
|
|
#ifndef TCP6_ROUNDFRAC
|
|
#define TCP6_ROUNDFRAC 10 /* round down at most N/10, or 10% */
|
|
#endif
|
|
|
|
int tcp6_roundsize = TCP6_ROUNDSIZE;
|
|
int tcp6_roundfrac = TCP6_ROUNDFRAC;
|
|
#endif /*TCP6*/
|
|
|
|
/* UDP on IP6 parameters */
|
|
int udp6_sendspace = 9216; /* really max datagram size */
|
|
int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
|
|
/* 40 1K datagrams */
|