72584fd2c0
of protocols. The call to divert_packet() is done through a function pointer. All semantics of IPDIVERT remain intact. If IPDIVERT is not loaded ipfw will refuse to install divert rules and natd will complain about 'protocol not supported'. Once it is loaded both will work and accept rules and open the divert socket. The module can only be unloaded if no divert sockets are open. It does not close any divert sockets when an unload is requested but will return EBUSY instead.
293 lines
7.6 KiB
C
293 lines
7.6 KiB
C
/*
|
|
* 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.
|
|
* 4. 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_ipx.h"
|
|
#include "opt_mrouting.h"
|
|
#include "opt_ipsec.h"
|
|
#include "opt_inet6.h"
|
|
#include "opt_pf.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/domain.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <net/if.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/igmp_var.h>
|
|
#ifdef PIM
|
|
#include <netinet/pim_var.h>
|
|
#endif
|
|
#include <netinet/tcp.h>
|
|
#include <netinet/tcp_timer.h>
|
|
#include <netinet/tcp_var.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>
|
|
#endif /* FAST_IPSEC */
|
|
|
|
#ifdef IPXIP
|
|
#include <netipx/ipx_ip.h>
|
|
#endif
|
|
|
|
#ifdef DEV_PFSYNC
|
|
#include <net/pfvar.h>
|
|
#include <net/if_pfsync.h>
|
|
#endif
|
|
|
|
extern struct domain inetdomain;
|
|
|
|
/* Spacer for loadable protocols. */
|
|
#define IPPROTOSPACER \
|
|
{ 0, &inetdomain, PROTO_SPACER, 0, \
|
|
NULL, NULL, NULL, NULL, \
|
|
NULL, \
|
|
NULL, NULL, NULL, NULL, \
|
|
&nousrreqs \
|
|
}
|
|
|
|
struct protosw inetsw[] = {
|
|
{ 0, &inetdomain, 0, 0,
|
|
0, 0, 0, 0,
|
|
0,
|
|
ip_init, 0, ip_slowtimo, ip_drain,
|
|
&nousrreqs
|
|
},
|
|
{ SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR,
|
|
udp_input, 0, udp_ctlinput, ip_ctloutput,
|
|
0,
|
|
udp_init, 0, 0, 0,
|
|
&udp_usrreqs
|
|
},
|
|
{ SOCK_STREAM, &inetdomain, IPPROTO_TCP,
|
|
PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
|
|
tcp_input, 0, tcp_ctlinput, tcp_ctloutput,
|
|
0,
|
|
tcp_init, 0, tcp_slowtimo, tcp_drain,
|
|
&tcp_usrreqs
|
|
},
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR,
|
|
rip_input, 0, rip_ctlinput, rip_ctloutput,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
icmp_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
igmp_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
igmp_init, igmp_fasttimo, igmp_slowtimo, 0,
|
|
&rip_usrreqs
|
|
},
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
rsvp_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
#ifdef IPSEC
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
|
|
ah4_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
#ifdef IPSEC_ESP
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
|
|
esp4_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
#endif
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
|
|
ipcomp4_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
#endif /* IPSEC */
|
|
#ifdef FAST_IPSEC
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
|
|
ah4_input, 0, ah4_ctlinput, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
|
|
esp4_input, 0, esp4_ctlinput, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
|
|
ipcomp4_input, 0, 0, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&nousrreqs
|
|
},
|
|
#endif /* FAST_IPSEC */
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
encap4_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
encap_init, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
encap4_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
encap_init, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
encap4_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
encap_init, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
# ifdef INET6
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
encap4_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
encap_init, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
#endif
|
|
#ifdef IPXIP
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
ipxip_input, 0, ipxip_ctlinput, 0,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
#endif
|
|
#ifdef PIM
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
pim_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
#endif /* PIM */
|
|
#ifdef DEV_PFSYNC
|
|
{ SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR,
|
|
pfsync_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
0, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
#endif /* DEV_PFSYNC */
|
|
/* Spacer n-times for loadable protocols. */
|
|
IPPROTOSPACER,
|
|
IPPROTOSPACER,
|
|
IPPROTOSPACER,
|
|
IPPROTOSPACER,
|
|
IPPROTOSPACER,
|
|
IPPROTOSPACER,
|
|
IPPROTOSPACER,
|
|
IPPROTOSPACER,
|
|
/* raw wildcard */
|
|
{ SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR,
|
|
rip_input, 0, 0, rip_ctloutput,
|
|
0,
|
|
rip_init, 0, 0, 0,
|
|
&rip_usrreqs
|
|
},
|
|
};
|
|
|
|
extern int in_inithead(void **, int);
|
|
|
|
struct domain inetdomain =
|
|
{ AF_INET, "internet", 0, 0, 0,
|
|
inetsw,
|
|
&inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0,
|
|
in_inithead, 32, sizeof(struct sockaddr_in)
|
|
};
|
|
|
|
DOMAIN_SET(inet);
|
|
|
|
SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0,
|
|
"Internet Family");
|
|
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP");
|
|
#ifdef FAST_IPSEC
|
|
/* XXX no protocol # to use, pick something "reserved" */
|
|
SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP");
|
|
#else
|
|
#ifdef IPSEC
|
|
SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC");
|
|
#endif /* IPSEC */
|
|
#endif /* !FAST_IPSEC */
|
|
SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW");
|
|
#ifdef PIM
|
|
SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM");
|
|
#endif
|