in_proto.c revision 133874 
1/*
2 * Copyright (c) 1982, 1986, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)in_proto.c	8.2 (Berkeley) 2/9/95
30 * $FreeBSD: head/sys/netinet/in_proto.c 133874 2004-08-16 18:32:07Z rwatson $
31 */
32
33#include "opt_ipdivert.h"
34#include "opt_ipx.h"
35#include "opt_mrouting.h"
36#include "opt_ipsec.h"
37#include "opt_inet6.h"
38#include "opt_pf.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/socket.h>
44#include <sys/domain.h>
45#include <sys/protosw.h>
46#include <sys/queue.h>
47#include <sys/sysctl.h>
48
49#include <net/if.h>
50#include <net/route.h>
51
52#include <netinet/in.h>
53#include <netinet/in_systm.h>
54#include <netinet/ip.h>
55#include <netinet/ip_var.h>
56#include <netinet/ip_icmp.h>
57#include <netinet/ip_divert.h>
58#include <netinet/igmp_var.h>
59#ifdef PIM
60#include <netinet/pim_var.h>
61#endif
62#include <netinet/tcp.h>
63#include <netinet/tcp_timer.h>
64#include <netinet/tcp_var.h>
65#include <netinet/udp.h>
66#include <netinet/udp_var.h>
67#include <netinet/ip_encap.h>
68
69/*
70 * TCP/IP protocol family: IP, ICMP, UDP, TCP.
71 */
72
73#ifdef IPSEC
74#include <netinet6/ipsec.h>
75#include <netinet6/ah.h>
76#ifdef IPSEC_ESP
77#include <netinet6/esp.h>
78#endif
79#include <netinet6/ipcomp.h>
80#endif /* IPSEC */
81
82#ifdef FAST_IPSEC
83#include <netipsec/ipsec.h>
84#endif /* FAST_IPSEC */
85
86#ifdef IPXIP
87#include <netipx/ipx_ip.h>
88#endif
89
90#ifdef DEV_PFSYNC
91#include <net/pfvar.h>
92#include <net/if_pfsync.h>
93#endif
94
95extern	struct domain inetdomain;
96static	struct pr_usrreqs nousrreqs;
97
98struct protosw inetsw[] = {
99{ 0,		&inetdomain,	0,		0,
100  0,		0,		0,		0,
101  0,
102  ip_init,	0,		ip_slowtimo,	ip_drain,
103  &nousrreqs
104},
105{ SOCK_DGRAM,	&inetdomain,	IPPROTO_UDP,	PR_ATOMIC|PR_ADDR,
106  udp_input,	0,		udp_ctlinput,	ip_ctloutput,
107  0,
108  udp_init,	0,		0,		0,
109  &udp_usrreqs
110},
111{ SOCK_STREAM,	&inetdomain,	IPPROTO_TCP,
112	PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
113  tcp_input,	0,		tcp_ctlinput,	tcp_ctloutput,
114  0,
115  tcp_init,	0,		tcp_slowtimo,	tcp_drain,
116  &tcp_usrreqs
117},
118{ SOCK_RAW,	&inetdomain,	IPPROTO_RAW,	PR_ATOMIC|PR_ADDR,
119  rip_input,	0,		rip_ctlinput,	rip_ctloutput,
120  0,
121  0,		0,		0,		0,
122  &rip_usrreqs
123},
124{ SOCK_RAW,	&inetdomain,	IPPROTO_ICMP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
125  icmp_input,	0,		0,		rip_ctloutput,
126  0,
127  0,		0,		0,		0,
128  &rip_usrreqs
129},
130{ SOCK_RAW,	&inetdomain,	IPPROTO_IGMP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
131  igmp_input,	0,		0,		rip_ctloutput,
132  0,
133  igmp_init,	igmp_fasttimo,	igmp_slowtimo,	0,
134  &rip_usrreqs
135},
136{ SOCK_RAW,	&inetdomain,	IPPROTO_RSVP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
137  rsvp_input,	0,		0,		rip_ctloutput,
138  0,
139  0,		0,		0,		0,
140  &rip_usrreqs
141},
142#ifdef IPSEC
143{ SOCK_RAW,	&inetdomain,	IPPROTO_AH,	PR_ATOMIC|PR_ADDR,
144  ah4_input,	0,		0,		0,
145  0,
146  0,		0,		0,		0,
147  &nousrreqs
148},
149#ifdef IPSEC_ESP
150{ SOCK_RAW,	&inetdomain,	IPPROTO_ESP,	PR_ATOMIC|PR_ADDR,
151  esp4_input,	0,		0,		0,
152  0,
153  0,		0,		0,		0,
154  &nousrreqs
155},
156#endif
157{ SOCK_RAW,	&inetdomain,	IPPROTO_IPCOMP,	PR_ATOMIC|PR_ADDR,
158  ipcomp4_input, 0,		0,		0,
159  0,
160  0,		0,		0,		0,
161  &nousrreqs
162},
163#endif /* IPSEC */
164#ifdef FAST_IPSEC
165{ SOCK_RAW,	&inetdomain,	IPPROTO_AH,	PR_ATOMIC|PR_ADDR,
166  ah4_input,	0,		ah4_ctlinput,	0,
167  0,
168  0,		0,		0,		0,
169  &nousrreqs
170},
171{ SOCK_RAW,	&inetdomain,	IPPROTO_ESP,	PR_ATOMIC|PR_ADDR,
172  esp4_input,	0,		esp4_ctlinput,	0,
173  0,
174  0,		0,		0,		0,
175  &nousrreqs
176},
177{ SOCK_RAW,	&inetdomain,	IPPROTO_IPCOMP,	PR_ATOMIC|PR_ADDR,
178  ipcomp4_input,	0,		0,		0,
179  0,
180  0,		0,		0,		0,
181  &nousrreqs
182},
183#endif /* FAST_IPSEC */
184{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV4,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
185  encap4_input,	0,		0,		rip_ctloutput,
186  0,
187  encap_init,		0,		0,		0,
188  &rip_usrreqs
189},
190{ SOCK_RAW,	&inetdomain,	IPPROTO_MOBILE,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
191  encap4_input,	0,		0,		rip_ctloutput,
192  0,
193  encap_init,	0,		0,		0,
194  &rip_usrreqs
195},
196{ SOCK_RAW,	&inetdomain,	IPPROTO_GRE,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
197  encap4_input,	0,		0,		rip_ctloutput,
198  0,
199  encap_init,	0,		0,		0,
200  &rip_usrreqs
201},
202# ifdef INET6
203{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV6,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
204  encap4_input,	0,		0,		rip_ctloutput,
205  0,
206  encap_init,	0,		0,		0,
207  &rip_usrreqs
208},
209#endif
210#ifdef IPDIVERT
211{ SOCK_RAW,	&inetdomain,	IPPROTO_DIVERT,	PR_ATOMIC|PR_ADDR,
212  div_input,	0,		div_ctlinput,	ip_ctloutput,
213  0,
214  div_init,	0,		0,		0,
215  &div_usrreqs,
216},
217#endif
218#ifdef IPXIP
219{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
220  ipxip_input,	0,		ipxip_ctlinput,	0,
221  0,
222  0,		0,		0,		0,
223  &rip_usrreqs
224},
225#endif
226#ifdef PIM
227{ SOCK_RAW,	&inetdomain,	IPPROTO_PIM,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
228  pim_input,	0,		0,		rip_ctloutput,
229  0,
230  0,		0,		0,		0,
231  &rip_usrreqs
232},
233#endif	/* PIM */
234#ifdef DEV_PFSYNC
235{ SOCK_RAW,	&inetdomain,	IPPROTO_PFSYNC,	PR_ATOMIC|PR_ADDR,
236  pfsync_input,	0,		0,		rip_ctloutput,
237  0,
238  0,		0,		0,		0,
239  &rip_usrreqs
240},
241#endif	/* DEV_PFSYNC */
242	/* raw wildcard */
243{ SOCK_RAW,	&inetdomain,	0,		PR_ATOMIC|PR_ADDR,
244  rip_input,	0,		0,		rip_ctloutput,
245  0,
246  rip_init,	0,		0,		0,
247  &rip_usrreqs
248},
249};
250
251extern int in_inithead(void **, int);
252
253struct domain inetdomain =
254    { AF_INET, "internet", 0, 0, 0,
255      inetsw,
256      &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0,
257      in_inithead, 32, sizeof(struct sockaddr_in)
258    };
259
260DOMAIN_SET(inet);
261
262SYSCTL_NODE(_net,      PF_INET,		inet,	CTLFLAG_RW, 0,
263	"Internet Family");
264
265SYSCTL_NODE(_net_inet, IPPROTO_IP,	ip,	CTLFLAG_RW, 0,	"IP");
266SYSCTL_NODE(_net_inet, IPPROTO_ICMP,	icmp,	CTLFLAG_RW, 0,	"ICMP");
267SYSCTL_NODE(_net_inet, IPPROTO_UDP,	udp,	CTLFLAG_RW, 0,	"UDP");
268SYSCTL_NODE(_net_inet, IPPROTO_TCP,	tcp,	CTLFLAG_RW, 0,	"TCP");
269SYSCTL_NODE(_net_inet, IPPROTO_IGMP,	igmp,	CTLFLAG_RW, 0,	"IGMP");
270#ifdef FAST_IPSEC
271/* XXX no protocol # to use, pick something "reserved" */
272SYSCTL_NODE(_net_inet, 253,		ipsec,	CTLFLAG_RW, 0,	"IPSEC");
273SYSCTL_NODE(_net_inet, IPPROTO_AH,	ah,	CTLFLAG_RW, 0,	"AH");
274SYSCTL_NODE(_net_inet, IPPROTO_ESP,	esp,	CTLFLAG_RW, 0,	"ESP");
275SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,	ipcomp,	CTLFLAG_RW, 0,	"IPCOMP");
276SYSCTL_NODE(_net_inet, IPPROTO_IPIP,	ipip,	CTLFLAG_RW, 0,	"IPIP");
277#else
278#ifdef IPSEC
279SYSCTL_NODE(_net_inet, IPPROTO_AH,	ipsec,	CTLFLAG_RW, 0,	"IPSEC");
280#endif /* IPSEC */
281#endif /* !FAST_IPSEC */
282SYSCTL_NODE(_net_inet, IPPROTO_RAW,	raw,	CTLFLAG_RW, 0,	"RAW");
283#ifdef IPDIVERT
284SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,	divert,	CTLFLAG_RW, 0,	"DIVERT");
285#endif
286#ifdef PIM
287SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
288#endif
289