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 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD: releng/8.3/sys/netinet/in_proto.c 231453 2012-02-10 22:26:33Z tuexen $");
34
35 #include "opt_ipx.h"
36 #include "opt_mrouting.h"
37 #include "opt_ipsec.h"
38 #include "opt_inet6.h"
39 #include "opt_pf.h"
40 #include "opt_sctp.h"
41 #include "opt_mpath.h"
42
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/socket.h>
47 #include <sys/domain.h>
48 #include <sys/proc.h>
49 #include <sys/protosw.h>
50 #include <sys/queue.h>
51 #include <sys/sysctl.h>
52
53 #include <net/if.h>
54 #include <net/route.h>
55 #ifdef RADIX_MPATH
56 #include <net/radix_mpath.h>
57 #endif
58 #include <net/vnet.h>
59
60 #include <netinet/in.h>
61 #include <netinet/in_systm.h>
62 #include <netinet/in_var.h>
63 #include <netinet/ip.h>
64 #include <netinet/ip_var.h>
65 #include <netinet/ip_icmp.h>
66 #include <netinet/igmp_var.h>
67 #include <netinet/tcp.h>
68 #include <netinet/tcp_timer.h>
69 #include <netinet/tcp_var.h>
70 #include <netinet/udp.h>
71 #include <netinet/udp_var.h>
72 #include <netinet/ip_encap.h>
73
74 /*
75 * TCP/IP protocol family: IP, ICMP, UDP, TCP.
76 */
77
78 static struct pr_usrreqs nousrreqs;
79
80 #ifdef IPSEC
81 #include <netipsec/ipsec.h>
82 #endif /* IPSEC */
83
84 #ifdef SCTP
85 #include <netinet/in_pcb.h>
86 #include <netinet/sctp_pcb.h>
87 #include <netinet/sctp.h>
88 #include <netinet/sctp_var.h>
89 #endif /* SCTP */
90
91 #ifdef DEV_PFSYNC
92 #include <net/pfvar.h>
93 #include <net/if_pfsync.h>
94 #endif
95
96 FEATURE(inet, "Internet Protocol version 4");
97
98 extern struct domain inetdomain;
99
100 /* Spacer for loadable protocols. */
101 #define IPPROTOSPACER \
102 { \
103 .pr_domain = &inetdomain, \
104 .pr_protocol = PROTO_SPACER, \
105 .pr_usrreqs = &nousrreqs \
106 }
107
108 struct protosw inetsw[] = {
109 {
110 .pr_type = 0,
111 .pr_domain = &inetdomain,
112 .pr_protocol = IPPROTO_IP,
113 .pr_init = ip_init,
114 #ifdef VIMAGE
115 .pr_destroy = ip_destroy,
116 #endif
117 .pr_slowtimo = ip_slowtimo,
118 .pr_drain = ip_drain,
119 .pr_usrreqs = &nousrreqs
120 },
121 {
122 .pr_type = SOCK_DGRAM,
123 .pr_domain = &inetdomain,
124 .pr_protocol = IPPROTO_UDP,
125 .pr_flags = PR_ATOMIC|PR_ADDR,
126 .pr_input = udp_input,
127 .pr_ctlinput = udp_ctlinput,
128 .pr_ctloutput = udp_ctloutput,
129 .pr_init = udp_init,
130 #ifdef VIMAGE
131 .pr_destroy = udp_destroy,
132 #endif
133 .pr_usrreqs = &udp_usrreqs
134 },
135 {
136 .pr_type = SOCK_STREAM,
137 .pr_domain = &inetdomain,
138 .pr_protocol = IPPROTO_TCP,
139 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
140 .pr_input = tcp_input,
141 .pr_ctlinput = tcp_ctlinput,
142 .pr_ctloutput = tcp_ctloutput,
143 .pr_init = tcp_init,
144 #ifdef VIMAGE
145 .pr_destroy = tcp_destroy,
146 #endif
147 .pr_slowtimo = tcp_slowtimo,
148 .pr_drain = tcp_drain,
149 .pr_usrreqs = &tcp_usrreqs
150 },
151 #ifdef SCTP
152 {
153 .pr_type = SOCK_SEQPACKET,
154 .pr_domain = &inetdomain,
155 .pr_protocol = IPPROTO_SCTP,
156 .pr_flags = PR_WANTRCVD,
157 .pr_input = sctp_input,
158 .pr_ctlinput = sctp_ctlinput,
159 .pr_ctloutput = sctp_ctloutput,
160 .pr_init = sctp_init,
161 #ifdef VIMAGE
162 .pr_destroy = sctp_finish,
163 #endif
164 .pr_drain = sctp_drain,
165 .pr_usrreqs = &sctp_usrreqs
166 },
167 {
168 .pr_type = SOCK_STREAM,
169 .pr_domain = &inetdomain,
170 .pr_protocol = IPPROTO_SCTP,
171 .pr_flags = PR_WANTRCVD,
172 .pr_input = sctp_input,
173 .pr_ctlinput = sctp_ctlinput,
174 .pr_ctloutput = sctp_ctloutput,
175 .pr_drain = sctp_drain,
176 .pr_usrreqs = &sctp_usrreqs
177 },
178 #endif /* SCTP */
179 {
180 .pr_type = SOCK_RAW,
181 .pr_domain = &inetdomain,
182 .pr_protocol = IPPROTO_RAW,
183 .pr_flags = PR_ATOMIC|PR_ADDR,
184 .pr_input = rip_input,
185 .pr_ctlinput = rip_ctlinput,
186 .pr_ctloutput = rip_ctloutput,
187 .pr_usrreqs = &rip_usrreqs
188 },
189 {
190 .pr_type = SOCK_RAW,
191 .pr_domain = &inetdomain,
192 .pr_protocol = IPPROTO_ICMP,
193 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
194 .pr_input = icmp_input,
195 .pr_ctloutput = rip_ctloutput,
196 .pr_usrreqs = &rip_usrreqs
197 },
198 {
199 .pr_type = SOCK_RAW,
200 .pr_domain = &inetdomain,
201 .pr_protocol = IPPROTO_IGMP,
202 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
203 .pr_input = igmp_input,
204 .pr_ctloutput = rip_ctloutput,
205 .pr_fasttimo = igmp_fasttimo,
206 .pr_slowtimo = igmp_slowtimo,
207 .pr_usrreqs = &rip_usrreqs
208 },
209 {
210 .pr_type = SOCK_RAW,
211 .pr_domain = &inetdomain,
212 .pr_protocol = IPPROTO_RSVP,
213 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
214 .pr_input = rsvp_input,
215 .pr_ctloutput = rip_ctloutput,
216 .pr_usrreqs = &rip_usrreqs
217 },
218 #ifdef IPSEC
219 {
220 .pr_type = SOCK_RAW,
221 .pr_domain = &inetdomain,
222 .pr_protocol = IPPROTO_AH,
223 .pr_flags = PR_ATOMIC|PR_ADDR,
224 .pr_input = ah4_input,
225 .pr_ctlinput = ah4_ctlinput,
226 .pr_usrreqs = &nousrreqs
227 },
228 {
229 .pr_type = SOCK_RAW,
230 .pr_domain = &inetdomain,
231 .pr_protocol = IPPROTO_ESP,
232 .pr_flags = PR_ATOMIC|PR_ADDR,
233 .pr_input = esp4_input,
234 .pr_ctlinput = esp4_ctlinput,
235 .pr_usrreqs = &nousrreqs
236 },
237 {
238 .pr_type = SOCK_RAW,
239 .pr_domain = &inetdomain,
240 .pr_protocol = IPPROTO_IPCOMP,
241 .pr_flags = PR_ATOMIC|PR_ADDR,
242 .pr_input = ipcomp4_input,
243 .pr_usrreqs = &nousrreqs
244 },
245 #endif /* IPSEC */
246 {
247 .pr_type = SOCK_RAW,
248 .pr_domain = &inetdomain,
249 .pr_protocol = IPPROTO_IPV4,
250 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
251 .pr_input = encap4_input,
252 .pr_ctloutput = rip_ctloutput,
253 .pr_init = encap_init,
254 .pr_usrreqs = &rip_usrreqs
255 },
256 {
257 .pr_type = SOCK_RAW,
258 .pr_domain = &inetdomain,
259 .pr_protocol = IPPROTO_MOBILE,
260 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
261 .pr_input = encap4_input,
262 .pr_ctloutput = rip_ctloutput,
263 .pr_init = encap_init,
264 .pr_usrreqs = &rip_usrreqs
265 },
266 {
267 .pr_type = SOCK_RAW,
268 .pr_domain = &inetdomain,
269 .pr_protocol = IPPROTO_ETHERIP,
270 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
271 .pr_input = encap4_input,
272 .pr_ctloutput = rip_ctloutput,
273 .pr_init = encap_init,
274 .pr_usrreqs = &rip_usrreqs
275 },
276 {
277 .pr_type = SOCK_RAW,
278 .pr_domain = &inetdomain,
279 .pr_protocol = IPPROTO_GRE,
280 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
281 .pr_input = encap4_input,
282 .pr_ctloutput = rip_ctloutput,
283 .pr_init = encap_init,
284 .pr_usrreqs = &rip_usrreqs
285 },
286 # ifdef INET6
287 {
288 .pr_type = SOCK_RAW,
289 .pr_domain = &inetdomain,
290 .pr_protocol = IPPROTO_IPV6,
291 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
292 .pr_input = encap4_input,
293 .pr_ctloutput = rip_ctloutput,
294 .pr_init = encap_init,
295 .pr_usrreqs = &rip_usrreqs
296 },
297 #endif
298 {
299 .pr_type = SOCK_RAW,
300 .pr_domain = &inetdomain,
301 .pr_protocol = IPPROTO_PIM,
302 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
303 .pr_input = encap4_input,
304 .pr_ctloutput = rip_ctloutput,
305 .pr_usrreqs = &rip_usrreqs
306 },
307 #ifdef DEV_PFSYNC
308 {
309 .pr_type = SOCK_RAW,
310 .pr_domain = &inetdomain,
311 .pr_protocol = IPPROTO_PFSYNC,
312 .pr_flags = PR_ATOMIC|PR_ADDR,
313 .pr_input = pfsync_input,
314 .pr_ctloutput = rip_ctloutput,
315 .pr_usrreqs = &rip_usrreqs
316 },
317 #endif /* DEV_PFSYNC */
318 /* Spacer n-times for loadable protocols. */
319 IPPROTOSPACER,
320 IPPROTOSPACER,
321 IPPROTOSPACER,
322 IPPROTOSPACER,
323 IPPROTOSPACER,
324 IPPROTOSPACER,
325 IPPROTOSPACER,
326 IPPROTOSPACER,
327 /* raw wildcard */
328 {
329 .pr_type = SOCK_RAW,
330 .pr_domain = &inetdomain,
331 .pr_flags = PR_ATOMIC|PR_ADDR,
332 .pr_input = rip_input,
333 .pr_ctloutput = rip_ctloutput,
334 .pr_init = rip_init,
335 #ifdef VIMAGE
336 .pr_destroy = rip_destroy,
337 #endif
338 .pr_usrreqs = &rip_usrreqs
339 },
340 };
341
342 extern int in_inithead(void **, int);
343 extern int in_detachhead(void **, int);
344
345 struct domain inetdomain = {
346 .dom_family = AF_INET,
347 .dom_name = "internet",
348 .dom_protosw = inetsw,
349 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
350 #ifdef RADIX_MPATH
351 .dom_rtattach = rn4_mpath_inithead,
352 #else
353 .dom_rtattach = in_inithead,
354 #endif
355 #ifdef VIMAGE
356 .dom_rtdetach = in_detachhead,
357 #endif
358 .dom_rtoffset = 32,
359 .dom_maxrtkey = sizeof(struct sockaddr_in),
360 .dom_ifattach = in_domifattach,
361 .dom_ifdetach = in_domifdetach
362 };
363
364 VNET_DOMAIN_SET(inet);
365
366 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0,
367 "Internet Family");
368
369 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP");
370 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP");
371 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP");
372 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP");
373 #ifdef SCTP
374 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP");
375 #endif
376 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP");
377 #ifdef IPSEC
378 /* XXX no protocol # to use, pick something "reserved" */
379 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC");
380 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH");
381 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP");
382 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP");
383 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP");
384 #endif /* IPSEC */
385 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW");
386 #ifdef DEV_PFSYNC
387 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC");
388 #endif
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