in_proto.c revision 64192 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)in_proto.c	8.2 (Berkeley) 2/9/95
34 * $FreeBSD: head/sys/netinet/in_proto.c 64192 2000-08-03 14:09:52Z ru $
35 */
36
37#include "opt_ipdivert.h"
38#include "opt_ipx.h"
39#include "opt_ipsec.h"
40#include "opt_inet6.h"
41
42#include <sys/param.h>
43#include <sys/kernel.h>
44#include <sys/socket.h>
45#include <sys/domain.h>
46#include <sys/protosw.h>
47#include <sys/queue.h>
48#include <sys/sysctl.h>
49
50#include <net/if.h>
51#include <net/route.h>
52
53#include <netinet/in.h>
54#include <netinet/in_systm.h>
55#include <netinet/ip.h>
56#include <netinet/ip_var.h>
57#include <netinet/ip_icmp.h>
58#include <netinet/igmp_var.h>
59#include <netinet/tcp.h>
60#include <netinet/tcp_timer.h>
61#include <netinet/tcp_var.h>
62#include <netinet/udp.h>
63#include <netinet/udp_var.h>
64#include <netinet/ip_encap.h>
65
66#include <netinet/ipprotosw.h>
67
68/*
69 * TCP/IP protocol family: IP, ICMP, UDP, TCP.
70 */
71
72#ifdef IPSEC
73#include <netinet6/ipsec.h>
74#include <netinet6/ah.h>
75#ifdef IPSEC_ESP
76#include <netinet6/esp.h>
77#endif
78#endif /* IPSEC */
79
80#include "gif.h"
81#if NGIF > 0
82#include <netinet/in_gif.h>
83#endif
84
85#include "stf.h"
86#if NSTF > 0
87#include <net/if_stf.h>
88#endif
89
90#ifdef IPXIP
91#include <netipx/ipx_ip.h>
92#endif
93
94#ifdef NSIP
95#include <netns/ns.h>
96#include <netns/ns_if.h>
97#endif
98
99extern	struct domain inetdomain;
100static	struct pr_usrreqs nousrreqs;
101
102struct ipprotosw inetsw[] = {
103{ 0,		&inetdomain,	0,		0,
104  0,		0,		0,		0,
105  0,
106  ip_init,	0,		ip_slowtimo,	ip_drain,
107  &nousrreqs
108},
109{ SOCK_DGRAM,	&inetdomain,	IPPROTO_UDP,	PR_ATOMIC|PR_ADDR,
110  udp_input,	0,		udp_ctlinput,	ip_ctloutput,
111  0,
112  udp_init,	0,		0,		0,
113  &udp_usrreqs
114},
115{ SOCK_STREAM,	&inetdomain,	IPPROTO_TCP,
116	PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
117  tcp_input,	0,		tcp_ctlinput,	tcp_ctloutput,
118  0,
119  tcp_init,	0,		tcp_slowtimo,	tcp_drain,
120  &tcp_usrreqs
121},
122{ SOCK_RAW,	&inetdomain,	IPPROTO_RAW,	PR_ATOMIC|PR_ADDR,
123  rip_input,	0,		rip_ctlinput,	rip_ctloutput,
124  0,
125  0,		0,		0,		0,
126  &rip_usrreqs
127},
128{ SOCK_RAW,	&inetdomain,	IPPROTO_ICMP,	PR_ATOMIC|PR_ADDR,
129  icmp_input,	0,		0,		rip_ctloutput,
130  0,
131  0,		0,		0,		0,
132  &rip_usrreqs
133},
134{ SOCK_RAW,	&inetdomain,	IPPROTO_IGMP,	PR_ATOMIC|PR_ADDR,
135  igmp_input,	0,		0,		rip_ctloutput,
136  0,
137  igmp_init,	igmp_fasttimo,	igmp_slowtimo,	0,
138  &rip_usrreqs
139},
140{ SOCK_RAW,	&inetdomain,	IPPROTO_RSVP,	PR_ATOMIC|PR_ADDR,
141  rsvp_input,	0,		0,		rip_ctloutput,
142  0,
143  0,		0,		0,		0,
144  &rip_usrreqs
145},
146#ifdef IPSEC
147{ SOCK_RAW,	&inetdomain,	IPPROTO_AH,	PR_ATOMIC|PR_ADDR,
148  ah4_input,	0,	 	0,		0,
149  0,
150  0,		0,		0,		0,
151  &nousrreqs
152},
153#ifdef IPSEC_ESP
154{ SOCK_RAW,	&inetdomain,	IPPROTO_ESP,	PR_ATOMIC|PR_ADDR,
155  esp4_input,	0,	 	0,		0,
156  0,
157  0,		0,		0,		0,
158  &nousrreqs
159},
160#endif
161#endif /* IPSEC */
162{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV4,	PR_ATOMIC|PR_ADDR,
163  encap4_input,	0,	 	0,		rip_ctloutput,
164  0,
165  encap_init,		0,		0,		0,
166  &nousrreqs
167},
168# ifdef INET6
169{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV6,	PR_ATOMIC|PR_ADDR,
170  encap4_input,	0,	 	0,		rip_ctloutput,
171  0,
172  0,		0,		0,		0,
173  &nousrreqs
174},
175#endif
176#ifdef IPDIVERT
177{ SOCK_RAW,	&inetdomain,	IPPROTO_DIVERT,	PR_ATOMIC|PR_ADDR,
178  div_input,	0,	 	0,		ip_ctloutput,
179  0,
180  div_init,	0,		0,		0,
181  &div_usrreqs,
182},
183#endif
184#ifdef IPXIP
185{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR,
186  ipxip_input,	0,		ipxip_ctlinput,	0,
187  0,
188  0,		0,		0,		0,
189  &rip_usrreqs
190},
191#endif
192#ifdef NSIP
193{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR,
194  idpip_input,	0,		nsip_ctlinput,	0,
195  0,
196  0,		0,		0,		0,
197  &rip_usrreqs
198},
199#endif
200	/* raw wildcard */
201{ SOCK_RAW,	&inetdomain,	0,		PR_ATOMIC|PR_ADDR,
202  rip_input,	0,		0,		rip_ctloutput,
203  0,
204  rip_init,	0,		0,		0,
205  &rip_usrreqs
206},
207};
208
209#if NGIF > 0
210struct ipprotosw in_gif_protosw =
211{ SOCK_RAW,	&inetdomain,	0/*IPPROTO_IPV[46]*/,	PR_ATOMIC|PR_ADDR,
212  in_gif_input, rip_output,	0,		rip_ctloutput,
213  0,
214  0,            0,              0,              0,
215  &rip_usrreqs
216};
217#endif /*NGIF*/
218
219#if NSTF > 0
220struct ipprotosw in_stf_protosw =
221{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV6,	PR_ATOMIC|PR_ADDR,
222  in_stf_input, rip_output,	0,		rip_ctloutput,
223  0,
224  0,            0,              0,              0,
225  &rip_usrreqs
226};
227#endif /*NSTF*/
228
229extern int in_inithead __P((void **, int));
230
231struct domain inetdomain =
232    { AF_INET, "internet", 0, 0, 0,
233      (struct protosw *)inetsw,
234      (struct protosw *)&inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0,
235      in_inithead, 32, sizeof(struct sockaddr_in)
236    };
237
238DOMAIN_SET(inet);
239
240SYSCTL_NODE(_net,      PF_INET,		inet,	CTLFLAG_RW, 0,
241	"Internet Family");
242
243SYSCTL_NODE(_net_inet, IPPROTO_IP,	ip,	CTLFLAG_RW, 0,	"IP");
244SYSCTL_NODE(_net_inet, IPPROTO_ICMP,	icmp,	CTLFLAG_RW, 0,	"ICMP");
245SYSCTL_NODE(_net_inet, IPPROTO_UDP,	udp,	CTLFLAG_RW, 0,	"UDP");
246SYSCTL_NODE(_net_inet, IPPROTO_TCP,	tcp,	CTLFLAG_RW, 0,	"TCP");
247SYSCTL_NODE(_net_inet, IPPROTO_IGMP,	igmp,	CTLFLAG_RW, 0,	"IGMP");
248#ifdef IPSEC
249SYSCTL_NODE(_net_inet, IPPROTO_AH,	ipsec,	CTLFLAG_RW, 0,	"IPSEC");
250#endif /* IPSEC */
251SYSCTL_NODE(_net_inet, IPPROTO_RAW,	raw,	CTLFLAG_RW, 0,	"RAW");
252#ifdef IPDIVERT
253SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,	divert,	CTLFLAG_RW, 0,	"DIVERT");
254#endif
255
256