410 lines
13 KiB
C
410 lines
13 KiB
C
/*
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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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* $FreeBSD$
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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 <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.h>
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#include <netinet/ip_var.h>
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#include <netinet6/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/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/udp6_var.h>
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#include <netinet6/pim6_var.h>
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#include <netinet6/nd6.h>
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#include <netinet6/in6_prefix.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 /* INET6 */
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#include <netinet6/ah.h>
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#ifdef IPSEC_ESP
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#include <netinet6/esp.h>
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#endif
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#include <netinet6/ipcomp.h>
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#endif /*IPSEC*/
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#include <netinet6/ip6protosw.h>
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/* #include "gif.h" */
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#if NGIF > 0
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#include <netinet6/in6_gif.h>
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#endif
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#include <net/net_osdep.h>
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#define offsetof(type, member) ((size_t)(&((type *)0)->member))
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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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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_RAW, &inet6domain, IPPROTO_RAW, 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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{ SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC | PR_ADDR,
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icmp6_input, rip6_output, 0, 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, 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
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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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#if NGIF > 0
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{ SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR,
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in6_gif_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 INET6
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{ SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
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in6_gif_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 /* INET6 */
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#endif /* GIF */
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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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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 = 200;
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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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u_int32_t ip6_flow_seq;
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int ip6_auto_flowlabel = 1;
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#if NGIF > 0
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int ip6_gif_hlim = GIF_HLIM;
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#else
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int ip6_gif_hlim = 0;
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#endif
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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_mapped_addr_on = 1;
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u_int32_t ip6_id = 0UL;
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int ip6_keepfaith = 0;
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time_t ip6_log_time = (time_t)0L;
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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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u_int icmp6errratelim = 1000; /* 1000usec = 1msec */
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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_forwarding SYSCTL_HANDLER_ARGS
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{
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int error = 0;
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int old_ip6_forwarding;
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int changed;
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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_forwarding = ip6_forwarding;
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error = SYSCTL_IN(req, arg1, sizeof(int));
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if (error != 0)
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return (error);
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changed = (ip6_forwarding ? 1 : 0) ^ (old_ip6_forwarding ? 1 : 0);
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if (changed == 0)
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return (error);
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if (ip6_forwarding != 0) { /* host becomes router */
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int s = splnet();
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struct nd_prefix *pr, *next;
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for (pr = nd_prefix.lh_first; pr; pr = next) {
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next = pr->ndpr_next;
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if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
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in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr);
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prelist_remove(pr);
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}
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splx(s);
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} else { /* router becomes host */
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struct socket so;
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/* XXX: init dummy so */
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bzero(&so, sizeof(so));
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while(!LIST_EMPTY(&rr_prefix))
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delete_each_prefix(&so, LIST_FIRST(&rr_prefix),
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PR_ORIG_KERNEL);
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}
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return (error);
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}
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SYSCTL_OID(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
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CTLTYPE_INT|CTLFLAG_RW, &ip6_forwarding, 0, sysctl_ip6_forwarding,
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"I", "");
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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_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_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_MAPPED_ADDR,
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mapped_addr, CTLFLAG_RW, &ip6_mapped_addr_on, 0, "");
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/* net.inet6.icmp6 */
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
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rediraccept, CTLFLAG_RW, &icmp6_rediraccept, 0, "");
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
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redirtimeout, CTLFLAG_RW, &icmp6_redirtimeout, 0, "");
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SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
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&icmp6stat, icmp6stat, "");
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRRATELIMIT,
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errratelimit, CTLFLAG_RW, &icmp6errratelim, 0, "");
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
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nd6_prune, CTLFLAG_RW, &nd6_prune, 0, "");
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
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nd6_delay, CTLFLAG_RW, &nd6_delay, 0, "");
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
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nd6_umaxtries, CTLFLAG_RW, &nd6_umaxtries, 0, "");
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
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nd6_mmaxtries, CTLFLAG_RW, &nd6_mmaxtries, 0, "");
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
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nd6_useloopback, CTLFLAG_RW, &nd6_useloopback, 0, "");
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SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PROXYALL,
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nd6_proxyall, CTLFLAG_RW, &nd6_proxyall, 0, "");
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