NetBSD-5.0.2/sys/netinet/in_proto.c
/* $NetBSD: in_proto.c,v 1.94 2008/04/24 11:38:37 ad Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)in_proto.c 8.2 (Berkeley) 2/9/95
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: in_proto.c,v 1.94 2008/04/24 11:38:37 ad Exp $");
#include "opt_mrouting.h"
#include "opt_eon.h" /* ISO CLNL over IP */
#include "opt_iso.h" /* ISO TP tunneled over IP */
#include "opt_inet.h"
#include "opt_ipsec.h"
#include "opt_pim.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <net/if.h>
#include <net/radix.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip_icmp.h>
#include <netinet/in_ifattach.h>
#include <netinet/in_pcb.h>
#include <netinet/in_proto.h>
#ifdef INET6
#ifndef INET
#include <netinet/in.h>
#endif
#include <netinet/ip6.h>
#endif
#include <netinet/igmp_var.h>
#ifdef PIM
#include <netinet/pim_var.h>
#endif
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcpip.h>
#include <netinet/tcp_debug.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/ip_encap.h>
/*
* TCP/IP protocol family: IP, ICMP, UDP, TCP.
*/
#ifdef IPSEC
#include <netinet6/ipsec.h>
#include <netinet6/ah.h>
#ifdef IPSEC_ESP
#include <netinet6/esp.h>
#endif
#include <netinet6/ipcomp.h>
#endif /* IPSEC */
#ifdef FAST_IPSEC
#include <netipsec/ipsec.h>
#include <netipsec/key.h>
#endif /* FAST_IPSEC */
#ifdef TPIP
#include <netiso/tp_param.h>
#include <netiso/tp_var.h>
#endif /* TPIP */
#ifdef EON
#include <netiso/eonvar.h>
#endif /* EON */
#include "carp.h"
#if NCARP > 0
#include <netinet/ip_carp.h>
#endif
#include "etherip.h"
#if NETHERIP > 0
#include <netinet/ip_etherip.h>
#endif
DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */
/* Wrappers to acquire kernel_lock. */
PR_WRAP_USRREQ(rip_usrreq)
PR_WRAP_USRREQ(udp_usrreq)
PR_WRAP_USRREQ(tcp_usrreq)
#define rip_usrreq rip_usrreq_wrapper
#define udp_usrreq udp_usrreq_wrapper
#define tcp_usrreq tcp_usrreq_wrapper
PR_WRAP_CTLINPUT(rip_ctlinput)
PR_WRAP_CTLINPUT(udp_ctlinput)
PR_WRAP_CTLINPUT(tcp_ctlinput)
#define rip_ctlinput rip_ctlinput_wrapper
#define udp_ctlinput udp_ctlinput_wrapper
#define tcp_ctlinput tcp_ctlinput_wrapper
PR_WRAP_CTLOUTPUT(rip_ctloutput)
PR_WRAP_CTLOUTPUT(udp_ctloutput)
PR_WRAP_CTLOUTPUT(tcp_ctloutput)
#define rip_ctloutput rip_ctloutput_wrapper
#define udp_ctloutput udp_ctloutput_wrapper
#define tcp_ctloutput tcp_ctloutput_wrapper
#if defined(IPSEC) || defined(FAST_IPSEC)
PR_WRAP_CTLINPUT(ah4_ctlinput)
#define ah4_ctlinput ah4_ctlinput_wrapper
#endif
#if defined(IPSEC_ESP) || defined(FAST_IPSEC)
PR_WRAP_CTLINPUT(esp4_ctlinput)
#define esp4_ctlinput esp4_ctlinput_wrapper
#endif
#ifdef TPIP
PR_WRAP_CTLOUTPUT(tp_ctloutput)
#define tp_ctloutput tp_ctloutput_wrapper
PR_WRAP_CTLINPUT(tpip_ctlinput)
#define tpip_ctlinput tpip_ctlinput_wrapper
#endif
#ifdef EON
PR_WRAP_CTLINPUT(eonctlinput)
#define eonctlinput eonctlinput_wrapper
#endif
const struct protosw inetsw[] = {
{ .pr_domain = &inetdomain,
.pr_init = ip_init,
.pr_output = ip_output,
.pr_slowtimo = ip_slowtimo,
.pr_drain = ip_drain,
},
{ .pr_type = SOCK_DGRAM,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_UDP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF,
.pr_input = udp_input,
.pr_ctlinput = udp_ctlinput,
.pr_ctloutput = udp_ctloutput,
.pr_usrreq = udp_usrreq,
.pr_init = udp_init,
},
{ .pr_type = SOCK_STREAM,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_TCP,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF,
.pr_input = tcp_input,
.pr_ctlinput = tcp_ctlinput,
.pr_ctloutput = tcp_ctloutput,
.pr_usrreq = tcp_usrreq,
.pr_init = tcp_init,
.pr_slowtimo = tcp_slowtimo,
.pr_drain = tcp_drain,
},
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_RAW,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF,
.pr_input = rip_input,
.pr_output = rip_output,
.pr_ctlinput = rip_ctlinput,
.pr_ctloutput = rip_ctloutput,
.pr_usrreq = rip_usrreq,
},
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_ICMP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = icmp_input,
.pr_output = rip_output,
.pr_ctlinput = rip_ctlinput,
.pr_ctloutput = rip_ctloutput,
.pr_usrreq = rip_usrreq,
.pr_init = icmp_init,
},
#ifdef GATEWAY
{ .pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IP,
.pr_slowtimo = ipflow_slowtimo,
},
#endif /* GATEWAY */
#ifdef IPSEC
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_AH,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = ah4_input,
.pr_ctlinput = ah4_ctlinput,
.pr_init = ah4_init,
},
#ifdef IPSEC_ESP
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_ESP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = esp4_input,
.pr_ctlinput = esp4_ctlinput,
.pr_init = esp4_init,
},
#endif /* IPSEC_ESP */
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IPCOMP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = ipcomp4_input,
.pr_init = ipcomp4_init,
},
#endif /* IPSEC */
#ifdef FAST_IPSEC
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_AH,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = ipsec4_common_input,
.pr_ctlinput = ah4_ctlinput,
},
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_ESP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = ipsec4_common_input,
.pr_ctlinput = esp4_ctlinput,
},
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IPCOMP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = ipsec4_common_input,
},
#endif /* FAST_IPSEC */
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IPV4,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = encap4_input,
.pr_output = rip_output,
.pr_ctlinput = rip_ctlinput,
.pr_ctloutput = rip_ctloutput,
.pr_usrreq = rip_usrreq,
.pr_init = encap_init,
},
#ifdef INET6
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IPV6,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = encap4_input,
.pr_output = rip_output,
.pr_ctlinput = rip_ctlinput,
.pr_ctloutput = rip_ctloutput,
.pr_usrreq = rip_usrreq,
.pr_init = encap_init,
},
#endif /* INET6 */
#if NETHERIP > 0
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_ETHERIP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = ip_etherip_input,
.pr_output = rip_output,
.pr_ctlinput = rip_ctlinput,
.pr_ctloutput = rip_ctloutput,
.pr_usrreq = rip_usrreq,
},
#endif /* NETHERIP > 0 */
#if NCARP > 0
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_CARP,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = carp_proto_input,
.pr_output = rip_output,
.pr_ctloutput = rip_ctloutput,
.pr_usrreq = rip_usrreq,
},
#endif /* NCARP > 0 */
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IGMP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = igmp_input,
.pr_output = rip_output,
.pr_ctloutput = rip_ctloutput,
.pr_ctlinput = rip_ctlinput,
.pr_usrreq = rip_usrreq,
.pr_fasttimo = igmp_fasttimo,
.pr_slowtimo = igmp_slowtimo,
.pr_init = igmp_init,
},
#ifdef PIM
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_PIM,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = pim_input,
.pr_output = rip_output,
.pr_ctloutput = rip_ctloutput,
.pr_ctlinput = rip_ctlinput,
.pr_usrreq = rip_usrreq,
},
#endif /* PIM */
#ifdef TPIP
{ .pr_type = SOCK_SEQPACKET,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_TP,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_LASTHDR|PR_ABRTACPTDIS,
.pr_input = tpip_input,
.pr_ctloutput = tp_ctloutput,
.pr_ctlinput = tpip_ctlinput,
.pr_usrreq = tp_usrreq,
.pr_init = tp_init,
.pr_slowtimo = tp_slowtimo,
.pr_drain = tp_drain,
},
#endif /* TPIP */
#ifdef ISO
/* EON (ISO CLNL over IP) */
#ifdef EON
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_EON,
.pr_flags = PR_LASTHDR,
.pr_input = eoninput,
.pr_ctlinput = eonctlinput,
.pr_init = eonprotoinit,
},
#else
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_EON,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = encap4_input,
.pr_output = rip_output,
.pr_ctloutput = rip_ctloutput,
.pr_ctlinput = rip_ctlinput,
.pr_usrreq = rip_usrreq,
.pr_init = encap_init,
},
#endif /* EON */
#endif /* ISO */
/* raw wildcard */
{ .pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_input = rip_input,
.pr_output = rip_output,
.pr_ctloutput = rip_ctloutput,
.pr_ctlinput = rip_ctlinput,
.pr_usrreq = rip_usrreq,
.pr_init = rip_init,
},
};
extern struct ifqueue ipintrq;
const struct sockaddr_in in_any = {
.sin_len = sizeof(struct sockaddr_in)
, .sin_family = AF_INET
, .sin_port = 0
, .sin_addr = {.s_addr = 0 /* INADDR_ANY */}
};
struct domain inetdomain = {
.dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL,
.dom_externalize = NULL, .dom_dispose = NULL,
.dom_protosw = inetsw,
.dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)],
.dom_rtattach = rn_inithead,
.dom_rtoffset = 32, .dom_maxrtkey = sizeof(struct sockaddr_in),
#ifdef IPSELSRC
.dom_ifattach = in_domifattach,
.dom_ifdetach = in_domifdetach,
#else
.dom_ifattach = NULL,
.dom_ifdetach = NULL,
#endif
.dom_ifqueues = { &ipintrq, NULL },
.dom_link = { NULL },
.dom_mowner = MOWNER_INIT("",""),
.dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr),
.dom_sa_cmplen = sizeof(struct in_addr),
.dom_sa_any = (const struct sockaddr *)&in_any,
.dom_sockaddr_const_addr = sockaddr_in_const_addr,
.dom_sockaddr_addr = sockaddr_in_addr,
.dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache)
};
u_char ip_protox[IPPROTO_MAX];
int icmperrppslim = 100; /* 100pps */
static void
sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp)
{
socklen_t slen;
if (slenp == NULL)
return;
slen = sockaddr_getlen(sa);
*slenp = (socklen_t)MIN(sizeof(struct in_addr),
slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr)));
}
const void *
sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp)
{
const struct sockaddr_in *sin;
sockaddr_in_addrlen(sa, slenp);
sin = (const struct sockaddr_in *)sa;
return &sin->sin_addr;
}
void *
sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp)
{
struct sockaddr_in *sin;
sockaddr_in_addrlen(sa, slenp);
sin = (struct sockaddr_in *)sa;
return &sin->sin_addr;
}
int
sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2)
{
uint_fast8_t len;
const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr),
addrend = addrofs + sizeof(struct in_addr);
int rc;
const struct sockaddr_in *sin1, *sin2;
sin1 = satocsin(sa1);
sin2 = satocsin(sa2);
len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len));
if (len > addrofs &&
(rc = memcmp(&sin1->sin_addr, &sin2->sin_addr,
len - addrofs)) != 0)
return rc;
return sin1->sin_len - sin2->sin_len;
}