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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 128019 2004-04-07 20:46:16Z imp $
30 * $FreeBSD: head/sys/netinet/in_proto.c 130613 2004-06-16 23:24:02Z mlaier $
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