446 lines
12 KiB
C
446 lines
12 KiB
C
/* $NetBSD: in_proto.c,v 1.108 2014/03/20 20:44:15 christos 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. 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 8.2 (Berkeley) 2/9/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: in_proto.c,v 1.108 2014/03/20 20:44:15 christos Exp $");
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#include "opt_mrouting.h"
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#include "opt_inet.h"
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#include "opt_ipsec.h"
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#include "opt_pim.h"
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#include "opt_gateway.h"
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#include "opt_compat_netbsd.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/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/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/in_ifattach.h>
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#include <netinet/in_pcb.h>
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#include <netinet/in_proto.h>
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#ifdef INET6
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#ifndef INET
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#include <netinet/in.h>
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#endif
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#include <netinet/ip6.h>
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#endif
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#include <netinet/igmp_var.h>
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#ifdef PIM
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#include <netinet/pim_var.h>
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#endif
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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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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/ip_encap.h>
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/*
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* TCP/IP protocol family: IP, ICMP, UDP, TCP.
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*/
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#ifdef IPSEC
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#include <netipsec/ipsec.h>
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#include <netipsec/key.h>
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#endif /* IPSEC */
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#include "carp.h"
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#if NCARP > 0
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#include <netinet/ip_carp.h>
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#endif
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#include "pfsync.h"
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#if NPFSYNC > 0
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#include <net/pfvar.h>
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#include <net/if_pfsync.h>
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#endif
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#include "etherip.h"
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#if NETHERIP > 0
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#include <netinet/ip_etherip.h>
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#endif
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DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */
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/* Wrappers to acquire kernel_lock. */
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PR_WRAP_USRREQ(rip_usrreq)
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PR_WRAP_USRREQ(udp_usrreq)
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PR_WRAP_USRREQ(tcp_usrreq)
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#define rip_usrreq rip_usrreq_wrapper
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#define udp_usrreq udp_usrreq_wrapper
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#define tcp_usrreq tcp_usrreq_wrapper
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PR_WRAP_CTLINPUT(rip_ctlinput)
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PR_WRAP_CTLINPUT(udp_ctlinput)
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PR_WRAP_CTLINPUT(tcp_ctlinput)
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#define rip_ctlinput rip_ctlinput_wrapper
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#define udp_ctlinput udp_ctlinput_wrapper
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#define tcp_ctlinput tcp_ctlinput_wrapper
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PR_WRAP_CTLOUTPUT(rip_ctloutput)
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PR_WRAP_CTLOUTPUT(udp_ctloutput)
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PR_WRAP_CTLOUTPUT(tcp_ctloutput)
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#define rip_ctloutput rip_ctloutput_wrapper
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#define udp_ctloutput udp_ctloutput_wrapper
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#define tcp_ctloutput tcp_ctloutput_wrapper
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#if defined(IPSEC)
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PR_WRAP_CTLINPUT(ah4_ctlinput)
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#define ah4_ctlinput ah4_ctlinput_wrapper
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PR_WRAP_CTLINPUT(esp4_ctlinput)
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#define esp4_ctlinput esp4_ctlinput_wrapper
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#endif
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const struct protosw inetsw[] = {
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{ .pr_domain = &inetdomain,
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.pr_init = ip_init,
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.pr_output = ip_output,
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.pr_fasttimo = ip_fasttimo,
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.pr_slowtimo = ip_slowtimo,
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.pr_drain = ip_drainstub,
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},
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{ .pr_type = SOCK_DGRAM,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_UDP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF,
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.pr_input = udp_input,
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.pr_ctlinput = udp_ctlinput,
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.pr_ctloutput = udp_ctloutput,
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.pr_usrreq = udp_usrreq,
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.pr_init = udp_init,
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},
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{ .pr_type = SOCK_STREAM,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_TCP,
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.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF,
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.pr_input = tcp_input,
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.pr_ctlinput = tcp_ctlinput,
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.pr_ctloutput = tcp_ctloutput,
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.pr_usrreq = tcp_usrreq,
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.pr_init = tcp_init,
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.pr_fasttimo = tcp_fasttimo,
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.pr_drain = tcp_drainstub,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_RAW,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF,
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.pr_input = rip_input,
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.pr_output = rip_output,
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.pr_ctlinput = rip_ctlinput,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreq = rip_usrreq,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_ICMP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = icmp_input,
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.pr_output = rip_output,
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.pr_ctlinput = rip_ctlinput,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreq = rip_usrreq,
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.pr_init = icmp_init,
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},
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#ifdef GATEWAY
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{ .pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IP,
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.pr_slowtimo = ipflow_slowtimo,
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.pr_init = ipflow_poolinit,
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},
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#endif /* GATEWAY */
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#ifdef IPSEC
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_AH,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ipsec4_common_input,
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.pr_ctlinput = ah4_ctlinput,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_ESP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ipsec4_common_input,
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.pr_ctlinput = esp4_ctlinput,
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},
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IPCOMP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ipsec4_common_input,
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},
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#endif /* IPSEC */
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IPV4,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_output = rip_output,
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.pr_ctlinput = rip_ctlinput,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreq = rip_usrreq,
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.pr_init = encap_init,
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},
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#ifdef INET6
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IPV6,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_output = rip_output,
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.pr_ctlinput = rip_ctlinput,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreq = rip_usrreq,
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.pr_init = encap_init,
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},
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#endif /* INET6 */
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#if NETHERIP > 0
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_ETHERIP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = ip_etherip_input,
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.pr_output = rip_output,
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.pr_ctlinput = rip_ctlinput,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreq = rip_usrreq,
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},
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#endif /* NETHERIP > 0 */
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#if NCARP > 0
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_CARP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = carp_proto_input,
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.pr_output = rip_output,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreq = rip_usrreq,
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.pr_init = carp_init,
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},
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#endif /* NCARP > 0 */
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#if NPFSYNC > 0
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_PFSYNC,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = pfsync_input,
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.pr_output = rip_output,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreq = rip_usrreq,
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},
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#endif /* NPFSYNC > 0 */
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IGMP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = igmp_input,
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.pr_output = rip_output,
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.pr_ctloutput = rip_ctloutput,
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.pr_ctlinput = rip_ctlinput,
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.pr_usrreq = rip_usrreq,
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.pr_fasttimo = igmp_fasttimo,
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.pr_slowtimo = igmp_slowtimo,
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.pr_init = igmp_init,
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},
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#ifdef PIM
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_PIM,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = pim_input,
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.pr_output = rip_output,
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.pr_ctloutput = rip_ctloutput,
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.pr_ctlinput = rip_ctlinput,
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.pr_usrreq = rip_usrreq,
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},
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#endif /* PIM */
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/* raw wildcard */
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{ .pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = rip_input,
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.pr_output = rip_output,
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.pr_ctloutput = rip_ctloutput,
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.pr_ctlinput = rip_ctlinput,
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.pr_usrreq = rip_usrreq,
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.pr_init = rip_init,
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},
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};
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extern struct ifqueue ipintrq;
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const struct sockaddr_in in_any = {
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.sin_len = sizeof(struct sockaddr_in)
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, .sin_family = AF_INET
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, .sin_port = 0
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, .sin_addr = {.s_addr = 0 /* INADDR_ANY */}
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};
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struct domain inetdomain = {
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.dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL,
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.dom_externalize = NULL, .dom_dispose = NULL,
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.dom_protosw = inetsw,
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.dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)],
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.dom_rtattach = rt_inithead,
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.dom_rtoffset = 32,
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.dom_maxrtkey = sizeof(struct ip_pack4),
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#ifdef IPSELSRC
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.dom_ifattach = in_domifattach,
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.dom_ifdetach = in_domifdetach,
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#else
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.dom_ifattach = NULL,
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.dom_ifdetach = NULL,
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#endif
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.dom_ifqueues = { &ipintrq, NULL },
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.dom_link = { NULL },
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.dom_mowner = MOWNER_INIT("",""),
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.dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr),
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.dom_sa_cmplen = sizeof(struct in_addr),
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.dom_sa_any = (const struct sockaddr *)&in_any,
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.dom_sockaddr_const_addr = sockaddr_in_const_addr,
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.dom_sockaddr_addr = sockaddr_in_addr,
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.dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache)
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};
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u_char ip_protox[IPPROTO_MAX];
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int icmperrppslim = 100; /* 100pps */
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static void
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sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp)
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{
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socklen_t slen;
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if (slenp == NULL)
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return;
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slen = sockaddr_getlen(sa);
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*slenp = (socklen_t)MIN(sizeof(struct in_addr),
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slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr)));
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}
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const void *
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sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp)
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{
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const struct sockaddr_in *sin;
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sockaddr_in_addrlen(sa, slenp);
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sin = (const struct sockaddr_in *)sa;
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return &sin->sin_addr;
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}
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void *
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sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp)
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{
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struct sockaddr_in *sin;
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sockaddr_in_addrlen(sa, slenp);
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sin = (struct sockaddr_in *)sa;
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return &sin->sin_addr;
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}
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int
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sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2)
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{
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uint_fast8_t len;
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const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr),
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addrend = addrofs + sizeof(struct in_addr);
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int rc;
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const struct sockaddr_in *sin1, *sin2;
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sin1 = satocsin(sa1);
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sin2 = satocsin(sa2);
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len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len));
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if (len > addrofs &&
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(rc = memcmp(&sin1->sin_addr, &sin2->sin_addr,
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len - addrofs)) != 0)
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return rc;
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return sin1->sin_len - sin2->sin_len;
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}
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