9f43dad9fc
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
/*
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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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* 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 8.2 (Berkeley) 2/9/95
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* $FreeBSD$
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*/
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#include "opt_ipx.h"
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#include "opt_mrouting.h"
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#include "opt_ipsec.h"
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#include "opt_inet6.h"
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#include "opt_pf.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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#include <net/if.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/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_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 <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 <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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#ifdef FAST_IPSEC
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#include <netipsec/ipsec.h>
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#endif /* FAST_IPSEC */
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#ifdef IPXIP
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#include <netipx/ipx_ip.h>
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#endif
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#ifdef DEV_PFSYNC
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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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extern struct domain inetdomain;
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/* Spacer for loadable protocols. */
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#define IPPROTOSPACER \
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{ 0, &inetdomain, PROTO_SPACER, 0, \
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NULL, NULL, NULL, NULL, \
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NULL, \
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NULL, NULL, NULL, NULL, \
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&nousrreqs \
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}
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struct protosw inetsw[] = {
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{ 0, &inetdomain, 0, 0,
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0, 0, 0, 0,
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0,
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ip_init, 0, ip_slowtimo, ip_drain,
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&nousrreqs
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},
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{ SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR,
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udp_input, 0, udp_ctlinput, ip_ctloutput,
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0,
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udp_init, 0, 0, 0,
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&udp_usrreqs
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},
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{ SOCK_STREAM, &inetdomain, IPPROTO_TCP,
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PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
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tcp_input, 0, tcp_ctlinput, tcp_ctloutput,
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0,
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tcp_init, 0, tcp_slowtimo, tcp_drain,
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&tcp_usrreqs
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},
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{ SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR,
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rip_input, 0, rip_ctlinput, rip_ctloutput,
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0,
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0, 0, 0, 0,
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&rip_usrreqs
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},
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{ SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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icmp_input, 0, 0, rip_ctloutput,
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0,
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0, 0, 0, 0,
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&rip_usrreqs
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},
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{ SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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igmp_input, 0, 0, rip_ctloutput,
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0,
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igmp_init, igmp_fasttimo, igmp_slowtimo, 0,
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&rip_usrreqs
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},
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{ SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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rsvp_input, 0, 0, rip_ctloutput,
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0,
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0, 0, 0, 0,
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&rip_usrreqs
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},
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#ifdef IPSEC
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{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
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ah4_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, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
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esp4_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, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
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ipcomp4_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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#ifdef FAST_IPSEC
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{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
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ah4_input, 0, ah4_ctlinput, 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, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
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esp4_input, 0, esp4_ctlinput, 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, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
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ipcomp4_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 /* FAST_IPSEC */
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{ SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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encap4_input, 0, 0, rip_ctloutput,
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0,
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encap_init, 0, 0, 0,
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&rip_usrreqs
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},
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{ SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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encap4_input, 0, 0, rip_ctloutput,
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0,
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encap_init, 0, 0, 0,
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&rip_usrreqs
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},
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{ SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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encap4_input, 0, 0, rip_ctloutput,
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0,
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encap_init, 0, 0, 0,
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&rip_usrreqs
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},
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# ifdef INET6
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{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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encap4_input, 0, 0, rip_ctloutput,
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0,
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encap_init, 0, 0, 0,
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&rip_usrreqs
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},
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#endif
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#ifdef IPXIP
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{ SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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ipxip_input, 0, ipxip_ctlinput, 0,
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0,
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0, 0, 0, 0,
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&rip_usrreqs
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},
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#endif
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#ifdef PIM
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{ SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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pim_input, 0, 0, rip_ctloutput,
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0,
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0, 0, 0, 0,
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&rip_usrreqs
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},
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#endif /* PIM */
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#ifdef DEV_PFSYNC
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{ SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR,
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pfsync_input, 0, 0, rip_ctloutput,
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0,
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0, 0, 0, 0,
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&rip_usrreqs
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},
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#endif /* DEV_PFSYNC */
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/* Spacer n-times for loadable protocols. */
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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/* raw wildcard */
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{ SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR,
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rip_input, 0, 0, rip_ctloutput,
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0,
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rip_init, 0, 0, 0,
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&rip_usrreqs
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},
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};
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extern int in_inithead(void **, int);
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struct domain inetdomain =
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{ AF_INET, "internet", 0, 0, 0,
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inetsw,
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&inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0,
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in_inithead, 32, sizeof(struct sockaddr_in)
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};
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DOMAIN_SET(inet);
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SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0,
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"Internet Family");
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SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP");
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SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP");
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SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP");
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SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP");
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SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP");
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#ifdef FAST_IPSEC
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/* XXX no protocol # to use, pick something "reserved" */
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SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC");
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SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH");
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SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP");
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SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP");
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SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP");
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#else
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#ifdef IPSEC
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SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC");
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#endif /* IPSEC */
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#endif /* !FAST_IPSEC */
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SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW");
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#ifdef PIM
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SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM");
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#endif
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