486 lines
15 KiB
C
486 lines
15 KiB
C
/* $FreeBSD$ */
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/* $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 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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* 4. 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 "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipsec.h"
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#include "opt_ipstealth.h"
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#include "opt_carp.h"
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/socketvar.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 <sys/systm.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/radix.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip_encap.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.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 <netinet6/tcp6_var.h>
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#include <netinet6/raw_ip6.h>
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#include <netinet6/udp6_var.h>
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#include <netinet6/pim6_var.h>
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#include <netinet6/nd6.h>
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#ifdef IPSEC
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#include <netinet6/ipsec.h>
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#ifdef INET6
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#include <netinet6/ipsec6.h>
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#endif
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#include <netinet6/ah.h>
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#ifdef INET6
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#include <netinet6/ah6.h>
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#endif
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#ifdef IPSEC_ESP
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#include <netinet6/esp.h>
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#ifdef INET6
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#include <netinet6/esp6.h>
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#endif
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#endif
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#include <netinet6/ipcomp.h>
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#ifdef INET6
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#include <netinet6/ipcomp6.h>
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#endif
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#endif /* IPSEC */
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#ifdef DEV_CARP
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#include <netinet/ip_carp.h>
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#endif
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#ifdef FAST_IPSEC
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#include <netipsec/ipsec6.h>
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#define IPSEC
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#define IPSEC_ESP
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#define ah6_input ipsec6_common_input
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#define esp6_input ipsec6_common_input
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#define ipcomp6_input ipsec6_common_input
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#endif /* FAST_IPSEC */
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#include <netinet6/ip6protosw.h>
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#include <net/net_osdep.h>
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/*
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* TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
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*/
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extern struct domain inet6domain;
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static struct pr_usrreqs nousrreqs;
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#define PR_LISTEN 0
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#define PR_ABRTACPTDIS 0
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struct ip6protosw inet6sw[] = {
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{ 0, &inet6domain, IPPROTO_IPV6, 0,
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0, 0, 0, 0,
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0,
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ip6_init, 0, frag6_slowtimo, frag6_drain,
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&nousrreqs,
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},
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{ SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR,
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udp6_input, 0, udp6_ctlinput, ip6_ctloutput,
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0,
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0, 0, 0, 0,
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&udp6_usrreqs,
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},
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{ SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
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tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput,
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0,
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#ifdef INET /* don't call initialization and timeout routines twice */
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0, 0, 0, tcp_drain,
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#else
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tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain,
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#endif
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&tcp6_usrreqs,
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},
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{ SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR,
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rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
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0,
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0, 0, 0, 0,
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&rip6_usrreqs
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},
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{ SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
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0,
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icmp6_init, icmp6_fasttimo, 0, 0,
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&rip6_usrreqs
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},
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{ SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
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dest6_input, 0, 0, 0,
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0,
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0, 0, 0, 0,
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&nousrreqs
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},
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{ SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
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route6_input, 0, 0, 0,
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0,
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0, 0, 0, 0,
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&nousrreqs
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},
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{ SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
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frag6_input, 0, 0, 0,
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0,
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0, 0, 0, 0,
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&nousrreqs
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},
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#ifdef IPSEC
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{ SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
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ah6_input, 0, 0, 0,
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0,
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0, 0, 0, 0,
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&nousrreqs,
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},
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#ifdef IPSEC_ESP
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{ SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
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esp6_input, 0,
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esp6_ctlinput,
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0,
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0,
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0, 0, 0, 0,
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&nousrreqs,
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},
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#endif
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{ SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
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ipcomp6_input, 0, 0, 0,
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0,
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0, 0, 0, 0,
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&nousrreqs,
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},
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#endif /* IPSEC */
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#ifdef INET
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{ SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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encap6_input, rip6_output, 0, rip6_ctloutput,
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0,
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encap_init, 0, 0, 0,
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&rip6_usrreqs
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},
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#endif /* INET */
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{ SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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encap6_input, rip6_output, 0, rip6_ctloutput,
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0,
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encap_init, 0, 0, 0,
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&rip6_usrreqs
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},
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{ SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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pim6_input, rip6_output, 0, rip6_ctloutput,
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0,
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0, 0, 0, 0,
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&rip6_usrreqs
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},
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#ifdef DEV_CARP
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{ SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR,
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carp6_input, rip6_output, 0, rip6_ctloutput,
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0,
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0, 0, 0, 0,
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&rip6_usrreqs
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},
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#endif /* DEV_CARP */
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/* raw wildcard */
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{ SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR,
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rip6_input, rip6_output, 0, rip6_ctloutput,
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0,
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0, 0, 0, 0,
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&rip6_usrreqs
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},
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};
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extern int in6_inithead __P((void **, int));
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struct domain inet6domain =
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{ AF_INET6, "internet6", 0, 0, 0,
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(struct protosw *)inet6sw,
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(struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0,
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in6_inithead,
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offsetof(struct sockaddr_in6, sin6_addr) << 3,
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sizeof(struct sockaddr_in6),
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in6_domifattach, in6_domifdetach, };
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DOMAIN_SET(inet6);
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/*
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* Internet configuration info
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*/
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#ifndef IPV6FORWARDING
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#ifdef GATEWAY6
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#define IPV6FORWARDING 1 /* forward IP6 packets not for us */
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#else
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#define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
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#endif /* GATEWAY6 */
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#endif /* !IPV6FORWARDING */
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#ifndef IPV6_SENDREDIRECTS
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#define IPV6_SENDREDIRECTS 1
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#endif
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int ip6_forwarding = IPV6FORWARDING; /* act as router? */
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int ip6_sendredirects = IPV6_SENDREDIRECTS;
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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_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
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int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */
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int ip6_maxfrags; /* initialized in frag6.c:frag6_init() */
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int ip6_log_interval = 5;
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int ip6_hdrnestlimit = 50; /* appropriate? */
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int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
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int ip6_auto_flowlabel = 1;
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int ip6_gif_hlim = 0;
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int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
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int ip6_rr_prune = 5; /* router renumbering prefix
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* walk list every 5 sec. */
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int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
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int ip6_v6only = 1;
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int ip6_keepfaith = 0;
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time_t ip6_log_time = (time_t)0L;
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#ifdef IPSTEALTH
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int ip6stealth = 0;
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#endif
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/* icmp6 */
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/*
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* BSDI4 defines these variables in in_proto.c...
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* XXX: what if we don't define INET? Should we define pmtu6_expire
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* or so? (jinmei@kame.net 19990310)
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*/
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int pmtu_expire = 60*10;
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int pmtu_probe = 60*2;
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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_rediraccept = 1; /* accept and process redirects */
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int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
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int icmp6errppslim = 100; /* 100pps */
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int icmp6_nodeinfo = 3; /* enable/disable NI response */
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/* UDP on IP6 parameters */
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int udp6_sendspace = 9216; /* really max datagram size */
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int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
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/* 40 1K datagrams */
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/*
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* sysctl related items.
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*/
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SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0,
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"Internet6 Family");
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/* net.inet6 */
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SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
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SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6");
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SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6");
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SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6");
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#ifdef IPSEC
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SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
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#endif /* IPSEC */
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/* net.inet6.ip6 */
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static int
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sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
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{
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int error = 0;
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int old;
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error = SYSCTL_OUT(req, arg1, sizeof(int));
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if (error || !req->newptr)
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return (error);
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old = ip6_temp_preferred_lifetime;
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error = SYSCTL_IN(req, arg1, sizeof(int));
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if (ip6_temp_preferred_lifetime <
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ip6_desync_factor + ip6_temp_regen_advance) {
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ip6_temp_preferred_lifetime = old;
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return (EINVAL);
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}
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return (error);
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}
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static int
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sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
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{
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int error = 0;
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int old;
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error = SYSCTL_OUT(req, arg1, sizeof(int));
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if (error || !req->newptr)
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return (error);
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old = ip6_temp_valid_lifetime;
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error = SYSCTL_IN(req, arg1, sizeof(int));
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if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
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ip6_temp_preferred_lifetime = old;
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return (EINVAL);
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}
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return (error);
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}
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
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forwarding, CTLFLAG_RW, &ip6_forwarding, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
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redirect, CTLFLAG_RW, &ip6_sendredirects, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
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hlim, CTLFLAG_RW, &ip6_defhlim, 0, "");
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SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
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&ip6stat, ip6stat, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS,
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maxfragpackets, CTLFLAG_RW, &ip6_maxfragpackets, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
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accept_rtadv, CTLFLAG_RW, &ip6_accept_rtadv, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
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keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
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log_interval, CTLFLAG_RW, &ip6_log_interval, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
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hdrnestlimit, CTLFLAG_RW, &ip6_hdrnestlimit, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
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dad_count, CTLFLAG_RW, &ip6_dad_count, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
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auto_flowlabel, CTLFLAG_RW, &ip6_auto_flowlabel, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
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defmcasthlim, CTLFLAG_RW, &ip6_defmcasthlim, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
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gifhlim, CTLFLAG_RW, &ip6_gif_hlim, 0, "");
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SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
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kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
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use_deprecated, CTLFLAG_RW, &ip6_use_deprecated, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
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rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, "");
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SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
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use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr, 0, "");
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SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
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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, "");
|
|
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, "");
|