420 lines
13 KiB
C
420 lines
13 KiB
C
/* $NetBSD: in6_proto.c,v 1.21 2000/10/10 16:26:44 itojun Exp $ */
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/* $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 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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* 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 "opt_ipsec.h"
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#include <sys/param.h>
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#include <sys/socket.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 <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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#ifndef TCP6
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#endif
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#ifndef TCP6
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#include <netinet/in_pcb.h>
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#endif
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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 <netinet6/in6_pcb.h>
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#ifndef TCP6
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#include <netinet/tcp.h>
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#include <netinet/tcp_fsm.h>
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#include <netinet/tcp_seq.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/tcpip.h>
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#include <netinet/tcp_debug.h>
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#else
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#include <netinet6/tcp6.h>
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#include <netinet6/tcp6_fsm.h>
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#include <netinet6/tcp6_seq.h>
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#include <netinet6/tcp6_timer.h>
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#include <netinet6/tcp6_var.h>
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#endif
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#include <netinet6/udp6.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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#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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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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ip6_sysctl,
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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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udp6_usrreq, udp6_init,
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0, 0, 0,
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udp6_sysctl,
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},
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#ifdef TCP6
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{ SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
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tcp6_input, 0, tcp6_ctlinput, tcp6_ctloutput,
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tcp6_usrreq,
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tcp6_init, tcp6_fasttimo, tcp6_slowtimo, tcp6_drain,
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tcp6_sysctl,
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},
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#else
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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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tcp_usrreq,
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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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tcp_sysctl,
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},
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#endif /*TCP6*/
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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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rip6_usrreq,
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0, 0, 0, 0,
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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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rip6_usrreq,
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icmp6_init, icmp6_fasttimo, 0, 0,
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icmp6_sysctl,
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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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},
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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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},
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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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},
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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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ipsec6_sysctl,
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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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ipsec6_sysctl,
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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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ipsec6_sysctl,
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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,
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encap6_input, rip6_output, 0, rip6_ctloutput,
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rip6_usrreq,
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0, 0, 0, 0,
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},
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#endif
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{ SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
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encap6_input, rip6_output, 0, rip6_ctloutput,
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rip6_usrreq,
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#ifndef INET6
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0, 0, 0, 0,
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#else
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encap_init, 0, 0, 0,
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#endif
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},
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{ SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR,
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pim6_input, rip6_output, 0, rip6_ctloutput,
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rip6_usrreq,
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0, 0, 0, 0,
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},
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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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rip6_usrreq,
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rip6_init, 0, 0, 0,
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},
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};
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#if NGIF > 0
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struct ip6protosw in6_gif_protosw =
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{ SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR,
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in6_gif_input, rip6_output, 0, rip6_ctloutput,
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rip6_usrreq,
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0, 0, 0, 0,
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};
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#endif /*NGIF*/
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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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rn_inithead,
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offsetof(struct sockaddr_in6, sin6_addr) << 3,
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sizeof(struct sockaddr_in6) };
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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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#ifndef INET6_BINDV6ONLY
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int ip6_bindv6only = 1;
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#endif
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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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int icmp6errppslim = 100; /* 100pps */
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int icmp6_nodeinfo = 1; /* enable/disable NI response */
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#ifdef TCP6
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/* TCP on IP6 parameters */
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int tcp6_sendspace = 1024 * 8;
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int tcp6_recvspace = 1024 * 8;
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int tcp6_mssdflt = TCP6_MSS;
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int tcp6_rttdflt = TCP6TV_SRTTDFLT / PR_SLOWHZ;
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int tcp6_do_rfc1323 = 1;
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int tcp6_conntimeo = TCP6TV_KEEP_INIT; /* initial connection timeout */
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int tcp6_43maxseg = 0;
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int tcp6_pmtu = 0;
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/*
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* Parameters for keepalive option.
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* Connections for which SO_KEEPALIVE is set will be probed
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* after being idle for a time of tcp6_keepidle (in units of PR_SLOWHZ).
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* Starting at that time, the connection is probed at intervals
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* of tcp6_keepintvl (same units) until a response is received
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* or until tcp6_keepcnt probes have been made, at which time
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* the connection is dropped. Note that a tcp6_keepidle value
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* under 2 hours is nonconformant with RFC-1122, Internet Host Requirements.
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*/
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int tcp6_keepidle = TCP6TV_KEEP_IDLE; /* time before probing idle */
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int tcp6_keepintvl = TCP6TV_KEEPINTVL; /* interval betwn idle probes */
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int tcp6_keepcnt = TCP6TV_KEEPCNT; /* max idle probes */
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int tcp6_maxpersistidle = TCP6TV_KEEP_IDLE; /* max idle time in persist */
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#ifndef INET_SERVER
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#define TCP6_LISTEN_HASH_SIZE 17
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#define TCP6_CONN_HASH_SIZE 97
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#define TCP6_SYN_HASH_SIZE 293
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#define TCP6_SYN_BUCKET_SIZE 35
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#else
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#define TCP6_LISTEN_HASH_SIZE 97
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#define TCP6_CONN_HASH_SIZE 9973
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#define TCP6_SYN_HASH_SIZE 997
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#define TCP6_SYN_BUCKET_SIZE 35
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#endif
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int tcp6_listen_hash_size = TCP6_LISTEN_HASH_SIZE;
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int tcp6_conn_hash_size = TCP6_CONN_HASH_SIZE;
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struct tcp6_hash_list tcp6_listen_hash[TCP6_LISTEN_HASH_SIZE],
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tcp6_conn_hash[TCP6_CONN_HASH_SIZE];
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int tcp6_syn_cache_size = TCP6_SYN_HASH_SIZE;
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int tcp6_syn_cache_limit = TCP6_SYN_HASH_SIZE*TCP6_SYN_BUCKET_SIZE;
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int tcp6_syn_bucket_limit = 3*TCP6_SYN_BUCKET_SIZE;
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struct syn_cache_head6 tcp6_syn_cache[TCP6_SYN_HASH_SIZE];
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struct syn_cache_head6 *tcp6_syn_cache_first;
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int tcp6_syn_cache_interval = 8; /* runs timer every 4 seconds */
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int tcp6_syn_cache_timeo = TCP6TV_KEEP_INIT;
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/*
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* Parameters for computing a desirable data segment size
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* given an upper bound (either interface MTU, or peer's MSS option)_.
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* As applications tend to use a buffer size that is a multiple
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* of kilobytes, try for something that divides evenly. However,
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* do not round down too much.
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*
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* Round segment size down to a multiple of TCP6_ROUNDSIZE if this
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* does not result in lowering by more than (size/TCP6_ROUNDFRAC).
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* For example, round 536 to 512. Older versions of the system
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* effectively used MCLBYTES (1K or 2K) as TCP6_ROUNDSIZE, with
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* a value of 1 for TCP6_ROUNDFRAC (eliminating its effect).
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* We round to a multiple of 256 for SLIP.
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*/
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#ifndef TCP6_ROUNDSIZE
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#define TCP6_ROUNDSIZE 256 /* round to multiple of 256 */
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#endif
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#ifndef TCP6_ROUNDFRAC
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#define TCP6_ROUNDFRAC 10 /* round down at most N/10, or 10% */
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#endif
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int tcp6_roundsize = TCP6_ROUNDSIZE;
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int tcp6_roundfrac = TCP6_ROUNDFRAC;
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#endif /*TCP6*/
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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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