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e440aed958
freebsd/sys/netinet6/in6_proto.c
Qing Li e440aed958 This patch provides the back end support for equal-cost multi-path 
(ECMP) for both IPv4 and IPv6. Previously, multipath route insertion
is disallowed. For example,

	route add -net 192.103.54.0/24 10.9.44.1
	route add -net 192.103.54.0/24 10.9.44.2

The second route insertion will trigger an error message of
"add net 192.103.54.0/24: gateway 10.2.5.2: route already in table"

Multiple default routes can also be inserted. Here is the netstat
output:

default		10.2.5.1	UGS	0	3074	bge0 =>
default		10.2.5.2	UGS	0	0	bge0

When multipath routes exist, the "route delete" command requires
a specific gateway to be specified or else an error message would
be displayed. For example,

	route delete default

would fail and trigger the following error message:

"route: writing to routing socket: No such process"
"delete net default: not in table"

On the other hand,

	route delete default 10.2.5.2

would be successful: "delete net default: gateway 10.2.5.2"

One does not have to specify a gateway if there is only a single
route for a particular destination.

I need to perform more testings on address aliases and multiple
interfaces that have the same IP prefixes. This patch as it
stands today is not yet ready for prime time. Therefore, the ECMP
code fragments are fully guarded by the RADIX_MPATH macro.
Include the "options  RADIX_MPATH" in the kernel configuration
to enable this feature.

Reviewed by:	robert, sam, gnn, julian, kmacy
2008-04-13 05:45:14 +00:00

578 lines
18 KiB
C
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/*-
* 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.
*
* $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $
*/
/*-
* 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.
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_ipsec.h"
#include "opt_ipstealth.h"
#include "opt_carp.h"
#include "opt_sctp.h"
#include "opt_mpath.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>
#ifdef RADIX_MPATH
#include <net/radix_mpath.h>
#endif
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip_encap.h>
#include <netinet/ip.h>
#include <netinet/ip_var.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 <netinet6/tcp6_var.h>
#include <netinet6/raw_ip6.h>
#include <netinet6/udp6_var.h>
#include <netinet6/pim6_var.h>
#include <netinet6/nd6.h>
#ifdef DEV_CARP
#include <netinet/ip_carp.h>
#endif
#ifdef SCTP
#include <netinet/in_pcb.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctp.h>
#include <netinet/sctp_var.h>
#include <netinet6/sctp6_var.h>
#endif /* SCTP */
#ifdef IPSEC
#include <netipsec/ipsec.h>
#include <netipsec/ipsec6.h>
#endif /* IPSEC */
#include <netinet6/ip6protosw.h>
/*
* TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
*/
extern struct domain inet6domain;
static struct pr_usrreqs nousrreqs;
#define PR_LISTEN 0
#define PR_ABRTACPTDIS 0
struct ip6protosw inet6sw[] = {
{
.pr_type = 0,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_IPV6,
.pr_init = ip6_init,
.pr_slowtimo = frag6_slowtimo,
.pr_drain = frag6_drain,
.pr_usrreqs = &nousrreqs,
},
{
.pr_type = SOCK_DGRAM,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_UDP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = udp6_input,
.pr_ctlinput = udp6_ctlinput,
.pr_ctloutput = ip6_ctloutput,
.pr_usrreqs = &udp6_usrreqs,
},
{
.pr_type = SOCK_STREAM,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_TCP,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
.pr_input = tcp6_input,
.pr_ctlinput = tcp6_ctlinput,
.pr_ctloutput = tcp_ctloutput,
#ifndef INET /* don't call initialization and timeout routines twice */
.pr_init = tcp_init,
.pr_fasttimo = tcp_fasttimo,
.pr_slowtimo = tcp_slowtimo,
#endif
.pr_drain = tcp_drain,
.pr_usrreqs = &tcp6_usrreqs,
},
#ifdef SCTP
{
.pr_type = SOCK_DGRAM,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_WANTRCVD,
.pr_input = sctp6_input,
.pr_ctlinput = sctp6_ctlinput,
.pr_ctloutput = sctp_ctloutput,
.pr_drain = sctp_drain,
.pr_usrreqs = &sctp6_usrreqs
},
{
.pr_type = SOCK_SEQPACKET,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_WANTRCVD,
.pr_input = sctp6_input,
.pr_ctlinput = sctp6_ctlinput,
.pr_ctloutput = sctp_ctloutput,
.pr_drain = sctp_drain,
.pr_usrreqs = &sctp6_usrreqs
},
{
.pr_type = SOCK_STREAM,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_WANTRCVD,
.pr_input = sctp6_input,
.pr_ctlinput = sctp6_ctlinput,
.pr_ctloutput = sctp_ctloutput,
.pr_drain = sctp_drain,
.pr_usrreqs = &sctp6_usrreqs
},
#endif /* SCTP */
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_RAW,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = rip6_input,
.pr_output = rip6_output,
.pr_ctlinput = rip6_ctlinput,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs
},
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_ICMPV6,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = icmp6_input,
.pr_output = rip6_output,
.pr_ctlinput = rip6_ctlinput,
.pr_ctloutput = rip6_ctloutput,
.pr_init = icmp6_init,
.pr_fasttimo = icmp6_fasttimo,
.pr_usrreqs = &rip6_usrreqs
},
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_DSTOPTS,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = dest6_input,
.pr_usrreqs = &nousrreqs
},
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_ROUTING,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = route6_input,
.pr_usrreqs = &nousrreqs
},
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_FRAGMENT,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = frag6_input,
.pr_usrreqs = &nousrreqs
},
#ifdef IPSEC
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_AH,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = ipsec6_common_input,
.pr_usrreqs = &nousrreqs,
},
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_ESP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = ipsec6_common_input,
.pr_ctlinput = esp6_ctlinput,
.pr_usrreqs = &nousrreqs,
},
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_IPCOMP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = ipsec6_common_input,
.pr_usrreqs = &nousrreqs,
},
#endif /* IPSEC */
#ifdef INET
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_IPV4,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = encap6_input,
.pr_output = rip6_output,
.pr_ctloutput = rip6_ctloutput,
.pr_init = encap_init,
.pr_usrreqs = &rip6_usrreqs
},
#endif /* INET */
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_IPV6,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = encap6_input,
.pr_output = rip6_output,
.pr_ctloutput = rip6_ctloutput,
.pr_init = encap_init,
.pr_usrreqs = &rip6_usrreqs
},
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_PIM,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = encap6_input,
.pr_output = rip6_output,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs
},
#ifdef DEV_CARP
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_CARP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = carp6_input,
.pr_output = rip6_output,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs
},
#endif /* DEV_CARP */
/* raw wildcard */
{
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = rip6_input,
.pr_output = rip6_output,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs
},
};
extern int in6_inithead(void **, int);
struct domain inet6domain = {
.dom_family = AF_INET6,
.dom_name = "internet6",
.dom_protosw = (struct protosw *)inet6sw,
.dom_protoswNPROTOSW = (struct protosw *)
&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])],
#ifdef RADIX_MPATH
.dom_rtattach = rn6_mpath_inithead,
#else
.dom_rtattach = in6_inithead,
#endif
.dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3,
.dom_maxrtkey = sizeof(struct sockaddr_in6),
.dom_ifattach = in6_domifattach,
.dom_ifdetach = in6_domifdetach
};
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; /* initialized in frag6.c:frag6_init() */
int ip6_maxfrags; /* initialized in frag6.c:frag6_init() */
int ip6_log_interval = 5;
int ip6_hdrnestlimit = 15; /* How many header options will we process? */
int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
int ip6_auto_flowlabel = 1;
int ip6_gif_hlim = 0;
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? */
int ip6_v6only = 1;
int ip6_keepfaith = 0;
time_t ip6_log_time = (time_t)0L;
#ifdef IPSTEALTH
int ip6stealth = 0;
#endif
/* 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 */
/* control how to respond to NI queries */
int icmp6_nodeinfo = (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
/* 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 SCTP
SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW, 0, "SCTP6");
#endif
#ifdef IPSEC
SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
#endif /* IPSEC */
/* net.inet6.ip6 */
static int
sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
{
int error = 0;
int old;
error = SYSCTL_OUT(req, arg1, sizeof(int));
if (error || !req->newptr)
return (error);
old = ip6_temp_preferred_lifetime;
error = SYSCTL_IN(req, arg1, sizeof(int));
if (ip6_temp_preferred_lifetime <
ip6_desync_factor + ip6_temp_regen_advance) {
ip6_temp_preferred_lifetime = old;
return (EINVAL);
}
return (error);
}
static int
sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
{
int error = 0;
int old;
error = SYSCTL_OUT(req, arg1, sizeof(int));
if (error || !req->newptr)
return (error);
old = ip6_temp_valid_lifetime;
error = SYSCTL_IN(req, arg1, sizeof(int));
if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
ip6_temp_preferred_lifetime = old;
return (EINVAL);
}
return (error);
}
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
forwarding, CTLFLAG_RW, &ip6_forwarding, 0, "");
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_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
&ip6stat, ip6stat, "");
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_USETEMPADDR,
use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr, 0, "");
SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
sysctl_ip6_temppltime, "I", "");
SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
sysctl_ip6_tempvltime, "I", "");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
v6only, CTLFLAG_RW, &ip6_v6only, 0, "");
TUNABLE_INT("net.inet6.ip6.auto_linklocal", &ip6_auto_linklocal);
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal, 0, "");
SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
&rip6stat, rip6stat, "");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
prefer_tempaddr, CTLFLAG_RW, &ip6_prefer_tempaddr, 0, "");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
use_defaultzone, CTLFLAG_RW, &ip6_use_defzone, 0,"");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS,
maxfrags, CTLFLAG_RW, &ip6_maxfrags, 0, "");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU,
mcast_pmtu, CTLFLAG_RW, &ip6_mcast_pmtu, 0, "");
#ifdef IPSTEALTH
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_RW,
&ip6stealth, 0, "");
#endif
/* 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_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_NODEINFO,
nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "");
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
errppslimit, CTLFLAG_RW, &icmp6errppslim, 0, "");
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT,
nd6_maxnudhint, CTLFLAG_RW, &nd6_maxnudhint, 0, "");
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
nd6_debug, CTLFLAG_RW, &nd6_debug, 0, "");
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