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/9.0/sys/netinet/in_proto.c 223963 2011-07-12 19:29:29Z tuexen $");
34
35 #include "opt_ipx.h"
36 #include "opt_mrouting.h"
37 #include "opt_ipsec.h"
38 #include "opt_inet.h"
39 #include "opt_inet6.h"
40 #include "opt_pf.h"
41 #include "opt_sctp.h"
42 #include "opt_mpath.h"
43
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/socket.h>
48 #include <sys/domain.h>
49 #include <sys/proc.h>
50 #include <sys/protosw.h>
51 #include <sys/queue.h>
52 #include <sys/sysctl.h>
53
54 /*
55 * While this file provides the domain and protocol switch tables for IPv4, it
56 * also provides the sysctl node declarations for net.inet.* often shared with
57 * IPv6 for common features or by upper layer protocols. In case of no IPv4
58 * support compile out everything but these sysctl nodes.
59 */
60 #ifdef INET
61 #include <net/if.h>
62 #include <net/route.h>
63 #ifdef RADIX_MPATH
64 #include <net/radix_mpath.h>
65 #endif
66 #include <net/vnet.h>
67 #endif /* INET */
68
69 #if defined(INET) || defined(INET6)
70 #include <netinet/in.h>
71 #endif
72
73 #ifdef INET
74 #include <netinet/in_systm.h>
75 #include <netinet/in_var.h>
76 #include <netinet/ip.h>
77 #include <netinet/ip_var.h>
78 #include <netinet/ip_icmp.h>
79 #include <netinet/igmp_var.h>
80 #include <netinet/tcp.h>
81 #include <netinet/tcp_timer.h>
82 #include <netinet/tcp_var.h>
83 #include <netinet/udp.h>
84 #include <netinet/udp_var.h>
85 #include <netinet/ip_encap.h>
86
87 /*
88 * TCP/IP protocol family: IP, ICMP, UDP, TCP.
89 */
90
91 static struct pr_usrreqs nousrreqs;
92
93 #ifdef IPSEC
94 #include <netipsec/ipsec.h>
95 #endif /* IPSEC */
96
97 #ifdef SCTP
98 #include <netinet/in_pcb.h>
99 #include <netinet/sctp_pcb.h>
100 #include <netinet/sctp.h>
101 #include <netinet/sctp_var.h>
102 #endif /* SCTP */
103
104 #ifdef DEV_PFSYNC
105 #include <net/pfvar.h>
106 #include <net/if_pfsync.h>
107 #endif
108
109 FEATURE(inet, "Internet Protocol version 4");
110
111 extern struct domain inetdomain;
112
113 /* Spacer for loadable protocols. */
114 #define IPPROTOSPACER \
115 { \
116 .pr_domain = &inetdomain, \
117 .pr_protocol = PROTO_SPACER, \
118 .pr_usrreqs = &nousrreqs \
119 }
120
121 struct protosw inetsw[] = {
122 {
123 .pr_type = 0,
124 .pr_domain = &inetdomain,
125 .pr_protocol = IPPROTO_IP,
126 .pr_init = ip_init,
127 #ifdef VIMAGE
128 .pr_destroy = ip_destroy,
129 #endif
130 .pr_slowtimo = ip_slowtimo,
131 .pr_drain = ip_drain,
132 .pr_usrreqs = &nousrreqs
133 },
134 {
135 .pr_type = SOCK_DGRAM,
136 .pr_domain = &inetdomain,
137 .pr_protocol = IPPROTO_UDP,
138 .pr_flags = PR_ATOMIC|PR_ADDR,
139 .pr_input = udp_input,
140 .pr_ctlinput = udp_ctlinput,
141 .pr_ctloutput = udp_ctloutput,
142 .pr_init = udp_init,
143 #ifdef VIMAGE
144 .pr_destroy = udp_destroy,
145 #endif
146 .pr_usrreqs = &udp_usrreqs
147 },
148 {
149 .pr_type = SOCK_STREAM,
150 .pr_domain = &inetdomain,
151 .pr_protocol = IPPROTO_TCP,
152 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
153 .pr_input = tcp_input,
154 .pr_ctlinput = tcp_ctlinput,
155 .pr_ctloutput = tcp_ctloutput,
156 .pr_init = tcp_init,
157 #ifdef VIMAGE
158 .pr_destroy = tcp_destroy,
159 #endif
160 .pr_slowtimo = tcp_slowtimo,
161 .pr_drain = tcp_drain,
162 .pr_usrreqs = &tcp_usrreqs
163 },
164 #ifdef SCTP
165 {
166 .pr_type = SOCK_SEQPACKET,
167 .pr_domain = &inetdomain,
168 .pr_protocol = IPPROTO_SCTP,
169 .pr_flags = PR_WANTRCVD,
170 .pr_input = sctp_input,
171 .pr_ctlinput = sctp_ctlinput,
172 .pr_ctloutput = sctp_ctloutput,
173 .pr_init = sctp_init,
174 #ifdef VIMAGE
175 .pr_destroy = sctp_finish,
176 #endif
177 .pr_drain = sctp_drain,
178 .pr_usrreqs = &sctp_usrreqs
179 },
180 {
181 .pr_type = SOCK_STREAM,
182 .pr_domain = &inetdomain,
183 .pr_protocol = IPPROTO_SCTP,
184 .pr_flags = PR_WANTRCVD,
185 .pr_input = sctp_input,
186 .pr_ctlinput = sctp_ctlinput,
187 .pr_ctloutput = sctp_ctloutput,
188 .pr_drain = sctp_drain,
189 .pr_usrreqs = &sctp_usrreqs
190 },
191 #endif /* SCTP */
192 {
193 .pr_type = SOCK_RAW,
194 .pr_domain = &inetdomain,
195 .pr_protocol = IPPROTO_RAW,
196 .pr_flags = PR_ATOMIC|PR_ADDR,
197 .pr_input = rip_input,
198 .pr_ctlinput = rip_ctlinput,
199 .pr_ctloutput = rip_ctloutput,
200 .pr_usrreqs = &rip_usrreqs
201 },
202 {
203 .pr_type = SOCK_RAW,
204 .pr_domain = &inetdomain,
205 .pr_protocol = IPPROTO_ICMP,
206 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
207 .pr_input = icmp_input,
208 .pr_ctloutput = rip_ctloutput,
209 .pr_usrreqs = &rip_usrreqs
210 },
211 {
212 .pr_type = SOCK_RAW,
213 .pr_domain = &inetdomain,
214 .pr_protocol = IPPROTO_IGMP,
215 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
216 .pr_input = igmp_input,
217 .pr_ctloutput = rip_ctloutput,
218 .pr_fasttimo = igmp_fasttimo,
219 .pr_slowtimo = igmp_slowtimo,
220 .pr_usrreqs = &rip_usrreqs
221 },
222 {
223 .pr_type = SOCK_RAW,
224 .pr_domain = &inetdomain,
225 .pr_protocol = IPPROTO_RSVP,
226 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
227 .pr_input = rsvp_input,
228 .pr_ctloutput = rip_ctloutput,
229 .pr_usrreqs = &rip_usrreqs
230 },
231 #ifdef IPSEC
232 {
233 .pr_type = SOCK_RAW,
234 .pr_domain = &inetdomain,
235 .pr_protocol = IPPROTO_AH,
236 .pr_flags = PR_ATOMIC|PR_ADDR,
237 .pr_input = ah4_input,
238 .pr_ctlinput = ah4_ctlinput,
239 .pr_usrreqs = &nousrreqs
240 },
241 {
242 .pr_type = SOCK_RAW,
243 .pr_domain = &inetdomain,
244 .pr_protocol = IPPROTO_ESP,
245 .pr_flags = PR_ATOMIC|PR_ADDR,
246 .pr_input = esp4_input,
247 .pr_ctlinput = esp4_ctlinput,
248 .pr_usrreqs = &nousrreqs
249 },
250 {
251 .pr_type = SOCK_RAW,
252 .pr_domain = &inetdomain,
253 .pr_protocol = IPPROTO_IPCOMP,
254 .pr_flags = PR_ATOMIC|PR_ADDR,
255 .pr_input = ipcomp4_input,
256 .pr_usrreqs = &nousrreqs
257 },
258 #endif /* IPSEC */
259 {
260 .pr_type = SOCK_RAW,
261 .pr_domain = &inetdomain,
262 .pr_protocol = IPPROTO_IPV4,
263 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
264 .pr_input = encap4_input,
265 .pr_ctloutput = rip_ctloutput,
266 .pr_init = encap_init,
267 .pr_usrreqs = &rip_usrreqs
268 },
269 {
270 .pr_type = SOCK_RAW,
271 .pr_domain = &inetdomain,
272 .pr_protocol = IPPROTO_MOBILE,
273 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
274 .pr_input = encap4_input,
275 .pr_ctloutput = rip_ctloutput,
276 .pr_init = encap_init,
277 .pr_usrreqs = &rip_usrreqs
278 },
279 {
280 .pr_type = SOCK_RAW,
281 .pr_domain = &inetdomain,
282 .pr_protocol = IPPROTO_ETHERIP,
283 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
284 .pr_input = encap4_input,
285 .pr_ctloutput = rip_ctloutput,
286 .pr_init = encap_init,
287 .pr_usrreqs = &rip_usrreqs
288 },
289 {
290 .pr_type = SOCK_RAW,
291 .pr_domain = &inetdomain,
292 .pr_protocol = IPPROTO_GRE,
293 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
294 .pr_input = encap4_input,
295 .pr_ctloutput = rip_ctloutput,
296 .pr_init = encap_init,
297 .pr_usrreqs = &rip_usrreqs
298 },
299 # ifdef INET6
300 {
301 .pr_type = SOCK_RAW,
302 .pr_domain = &inetdomain,
303 .pr_protocol = IPPROTO_IPV6,
304 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
305 .pr_input = encap4_input,
306 .pr_ctloutput = rip_ctloutput,
307 .pr_init = encap_init,
308 .pr_usrreqs = &rip_usrreqs
309 },
310 #endif
311 {
312 .pr_type = SOCK_RAW,
313 .pr_domain = &inetdomain,
314 .pr_protocol = IPPROTO_PIM,
315 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
316 .pr_input = encap4_input,
317 .pr_ctloutput = rip_ctloutput,
318 .pr_usrreqs = &rip_usrreqs
319 },
320 #ifdef DEV_PFSYNC
321 {
322 .pr_type = SOCK_RAW,
323 .pr_domain = &inetdomain,
324 .pr_protocol = IPPROTO_PFSYNC,
325 .pr_flags = PR_ATOMIC|PR_ADDR,
326 .pr_input = pfsync_input,
327 .pr_ctloutput = rip_ctloutput,
328 .pr_usrreqs = &rip_usrreqs
329 },
330 #endif /* DEV_PFSYNC */
331 /* Spacer n-times for loadable protocols. */
332 IPPROTOSPACER,
333 IPPROTOSPACER,
334 IPPROTOSPACER,
335 IPPROTOSPACER,
336 IPPROTOSPACER,
337 IPPROTOSPACER,
338 IPPROTOSPACER,
339 IPPROTOSPACER,
340 /* raw wildcard */
341 {
342 .pr_type = SOCK_RAW,
343 .pr_domain = &inetdomain,
344 .pr_flags = PR_ATOMIC|PR_ADDR,
345 .pr_input = rip_input,
346 .pr_ctloutput = rip_ctloutput,
347 .pr_init = rip_init,
348 #ifdef VIMAGE
349 .pr_destroy = rip_destroy,
350 #endif
351 .pr_usrreqs = &rip_usrreqs
352 },
353 };
354
355 extern int in_inithead(void **, int);
356 extern int in_detachhead(void **, int);
357
358 struct domain inetdomain = {
359 .dom_family = AF_INET,
360 .dom_name = "internet",
361 .dom_protosw = inetsw,
362 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
363 #ifdef RADIX_MPATH
364 .dom_rtattach = rn4_mpath_inithead,
365 #else
366 .dom_rtattach = in_inithead,
367 #endif
368 #ifdef VIMAGE
369 .dom_rtdetach = in_detachhead,
370 #endif
371 .dom_rtoffset = 32,
372 .dom_maxrtkey = sizeof(struct sockaddr_in),
373 .dom_ifattach = in_domifattach,
374 .dom_ifdetach = in_domifdetach
375 };
376
377 VNET_DOMAIN_SET(inet);
378 #endif /* INET */
379
380 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0,
381 "Internet Family");
382
383 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP");
384 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP");
385 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP");
386 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP");
387 #ifdef SCTP
388 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP");
389 #endif
390 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP");
391 #ifdef IPSEC
392 /* XXX no protocol # to use, pick something "reserved" */
393 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC");
394 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH");
395 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP");
396 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP");
397 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP");
398 #endif /* IPSEC */
399 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW");
400 #ifdef DEV_PFSYNC
401 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC");
402 #endif
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