50ba589c66
pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
409 lines
13 KiB
C
409 lines
13 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* 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_ipsec.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/domain.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysctl.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.h>
|
|
#include <netinet/ip_var.h>
|
|
#include <netinet6/ip6.h>
|
|
#include <netinet6/ip6_var.h>
|
|
#include <netinet6/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 <netinet6/tcp6_var.h>
|
|
#include <netinet6/udp6_var.h>
|
|
|
|
#include <netinet6/pim6_var.h>
|
|
|
|
#include <netinet6/nd6.h>
|
|
#include <netinet6/in6_prefix.h>
|
|
|
|
#ifdef IPSEC
|
|
#include <netinet6/ipsec.h>
|
|
#include <netinet6/ah.h>
|
|
#include <netinet6/ipsec6.h>
|
|
#include <netinet6/ah6.h>
|
|
#ifdef IPSEC_ESP
|
|
#include <netinet6/esp.h>
|
|
#include <netinet6/esp6.h>
|
|
#endif
|
|
#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;
|
|
static struct pr_usrreqs nousrreqs;
|
|
|
|
struct ip6protosw inet6sw[] = {
|
|
{ 0, &inet6domain, IPPROTO_IPV6, 0,
|
|
0, 0, 0, 0,
|
|
0,
|
|
ip6_init, 0, frag6_slowtimo, frag6_drain,
|
|
&nousrreqs,
|
|
},
|
|
{ SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC | PR_ADDR,
|
|
udp6_input, 0, udp6_ctlinput, ip6_ctloutput,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&udp6_usrreqs,
|
|
},
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC | PR_ADDR,
|
|
rip6_input, rip6_output, 0, rip6_ctloutput,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&rip6_usrreqs
|
|
},
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC | PR_ADDR,
|
|
icmp6_input, rip6_output, 0, rip6_ctloutput,
|
|
0,
|
|
icmp6_init, icmp6_fasttimo, 0, 0,
|
|
&rip6_usrreqs
|
|
},
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
|
|
dest6_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
|
|
route6_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
|
|
frag6_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
#ifdef IPSEC
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
|
|
ah6_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs,
|
|
},
|
|
#ifdef IPSEC_ESP
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
|
|
esp6_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs,
|
|
},
|
|
#endif
|
|
#endif /* IPSEC */
|
|
#if NGIF > 0
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR,
|
|
in6_gif_input,0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
{ SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
|
|
in6_gif_input,0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
#endif /* GIF */
|
|
/* raw wildcard */
|
|
{ SOCK_RAW, &inet6domain, 0, PR_ATOMIC | PR_ADDR,
|
|
rip6_input, rip6_output, 0, rip6_ctloutput,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&rip6_usrreqs
|
|
},
|
|
};
|
|
|
|
extern int in6_inithead __P((void **, int));
|
|
|
|
struct domain inet6domain =
|
|
{ AF_INET6, "internet6", 0, 0, 0,
|
|
(struct protosw *)inet6sw,
|
|
(struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0,
|
|
in6_inithead,
|
|
offsetof(struct sockaddr_in6, sin6_addr) << 3,
|
|
sizeof(struct sockaddr_in6) };
|
|
|
|
DOMAIN_SET(inet6);
|
|
|
|
/*
|
|
* 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. */
|
|
int ip6_mapped_addr_on = 1;
|
|
|
|
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 */
|
|
u_int icmp6errratelim = 1000; /* 1000usec = 1msec */
|
|
|
|
/* UDP on IP6 parameters */
|
|
int udp6_sendspace = 9216; /* really max datagram size */
|
|
int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
|
|
/* 40 1K datagrams */
|
|
|
|
/*
|
|
* sysctl related items.
|
|
*/
|
|
SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0,
|
|
"Internet6 Family");
|
|
|
|
/* net.inet6 */
|
|
SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
|
|
SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6");
|
|
SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6");
|
|
SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6");
|
|
#ifdef IPSEC
|
|
SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
|
|
#endif /* IPSEC */
|
|
|
|
/* net.inet6.ip6 */
|
|
static int
|
|
sysctl_ip6_forwarding SYSCTL_HANDLER_ARGS
|
|
{
|
|
int error = 0;
|
|
int old_ip6_forwarding;
|
|
int changed;
|
|
|
|
error = SYSCTL_OUT(req, arg1, sizeof(int));
|
|
if (error || !req->newptr)
|
|
return (error);
|
|
old_ip6_forwarding = ip6_forwarding;
|
|
error = SYSCTL_IN(req, arg1, sizeof(int));
|
|
if (error != 0)
|
|
return (error);
|
|
changed = (ip6_forwarding ? 1 : 0) ^ (old_ip6_forwarding ? 1 : 0);
|
|
if (changed == 0)
|
|
return (error);
|
|
if (ip6_forwarding != 0) { /* host becomes router */
|
|
int s = splnet();
|
|
struct nd_prefix *pr, *next;
|
|
|
|
for (pr = LIST_FIRST(&nd_prefix); pr; pr = next) {
|
|
next = LIST_NEXT(pr, ndpr_entry);
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
|
|
in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr);
|
|
prelist_remove(pr);
|
|
}
|
|
splx(s);
|
|
} else { /* router becomes host */
|
|
struct socket so;
|
|
|
|
/* XXX: init dummy so */
|
|
bzero(&so, sizeof(so));
|
|
while(!LIST_EMPTY(&rr_prefix))
|
|
delete_each_prefix(&so, LIST_FIRST(&rr_prefix),
|
|
PR_ORIG_KERNEL);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_OID(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
|
|
CTLTYPE_INT|CTLFLAG_RW, &ip6_forwarding, 0, sysctl_ip6_forwarding,
|
|
"I", "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
|
|
redirect, CTLFLAG_RW, &ip6_sendredirects, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
|
|
hlim, CTLFLAG_RW, &ip6_defhlim, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS,
|
|
maxfragpackets, CTLFLAG_RW, &ip6_maxfragpackets, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
|
|
accept_rtadv, CTLFLAG_RW, &ip6_accept_rtadv, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
|
|
keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
|
|
log_interval, CTLFLAG_RW, &ip6_log_interval, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
|
|
hdrnestlimit, CTLFLAG_RW, &ip6_hdrnestlimit, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
|
|
dad_count, CTLFLAG_RW, &ip6_dad_count, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
|
|
auto_flowlabel, CTLFLAG_RW, &ip6_auto_flowlabel, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
|
|
defmcasthlim, CTLFLAG_RW, &ip6_defmcasthlim, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
|
|
gifhlim, CTLFLAG_RW, &ip6_gif_hlim, 0, "");
|
|
SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
|
|
kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
|
|
use_deprecated, CTLFLAG_RW, &ip6_use_deprecated, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
|
|
rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, "");
|
|
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAPPED_ADDR,
|
|
mapped_addr, CTLFLAG_RW, &ip6_mapped_addr_on, 0, "");
|
|
|
|
/* net.inet6.icmp6 */
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
|
|
rediraccept, CTLFLAG_RW, &icmp6_rediraccept, 0, "");
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
|
|
redirtimeout, CTLFLAG_RW, &icmp6_redirtimeout, 0, "");
|
|
SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
|
|
&icmp6stat, icmp6stat, "");
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRRATELIMIT,
|
|
errratelimit, CTLFLAG_RW, &icmp6errratelim, 0, "");
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
|
|
nd6_prune, CTLFLAG_RW, &nd6_prune, 0, "");
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
|
|
nd6_delay, CTLFLAG_RW, &nd6_delay, 0, "");
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
|
|
nd6_umaxtries, CTLFLAG_RW, &nd6_umaxtries, 0, "");
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
|
|
nd6_mmaxtries, CTLFLAG_RW, &nd6_mmaxtries, 0, "");
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
|
|
nd6_useloopback, CTLFLAG_RW, &nd6_useloopback, 0, "");
|
|
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PROXYALL,
|
|
nd6_proxyall, CTLFLAG_RW, &nd6_proxyall, 0, "");
|