2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1993
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8 * modification, are permitted provided that the following conditions
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31 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include "opt_mrouting.h"
38 #include "opt_ipsec.h"
40 #include "opt_inet6.h"
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/socket.h>
48 #include <sys/domain.h>
50 #include <sys/protosw.h>
51 #include <sys/queue.h>
52 #include <sys/sysctl.h>
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.
62 #include <net/if_var.h>
63 #include <net/route.h>
67 #if defined(INET) || defined(INET6)
68 #include <netinet/in.h>
72 #include <netinet/in_systm.h>
73 #include <netinet/in_var.h>
74 #include <netinet/ip.h>
75 #include <netinet/ip_var.h>
76 #include <netinet/ip_icmp.h>
77 #include <netinet/igmp_var.h>
78 #include <netinet/tcp.h>
79 #include <netinet/tcp_timer.h>
80 #include <netinet/tcp_var.h>
81 #include <netinet/udp.h>
82 #include <netinet/udp_var.h>
83 #include <netinet/ip_encap.h>
86 * TCP/IP protocol family: IP, ICMP, UDP, TCP.
89 static struct pr_usrreqs nousrreqs;
92 #include <netinet/in_pcb.h>
93 #include <netinet/sctp_pcb.h>
94 #include <netinet/sctp.h>
95 #include <netinet/sctp_var.h>
98 FEATURE(inet, "Internet Protocol version 4");
100 extern struct domain inetdomain;
102 /* Spacer for loadable protocols. */
103 #define IPPROTOSPACER \
105 .pr_domain = &inetdomain, \
106 .pr_protocol = PROTO_SPACER, \
107 .pr_usrreqs = &nousrreqs \
110 struct protosw inetsw[] = {
113 .pr_domain = &inetdomain,
114 .pr_protocol = IPPROTO_IP,
116 .pr_slowtimo = ip_slowtimo,
117 .pr_drain = ip_drain,
118 .pr_usrreqs = &nousrreqs
121 .pr_type = SOCK_DGRAM,
122 .pr_domain = &inetdomain,
123 .pr_protocol = IPPROTO_UDP,
124 .pr_flags = PR_ATOMIC|PR_ADDR,
125 .pr_input = udp_input,
126 .pr_ctlinput = udp_ctlinput,
127 .pr_ctloutput = udp_ctloutput,
129 .pr_usrreqs = &udp_usrreqs
132 .pr_type = SOCK_STREAM,
133 .pr_domain = &inetdomain,
134 .pr_protocol = IPPROTO_TCP,
135 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
136 .pr_input = tcp_input,
137 .pr_ctlinput = tcp_ctlinput,
138 .pr_ctloutput = tcp_ctloutput,
140 .pr_slowtimo = tcp_slowtimo,
141 .pr_drain = tcp_drain,
142 .pr_usrreqs = &tcp_usrreqs
146 .pr_type = SOCK_SEQPACKET,
147 .pr_domain = &inetdomain,
148 .pr_protocol = IPPROTO_SCTP,
149 .pr_flags = PR_WANTRCVD|PR_LASTHDR,
150 .pr_input = sctp_input,
151 .pr_ctlinput = sctp_ctlinput,
152 .pr_ctloutput = sctp_ctloutput,
153 .pr_init = sctp_init,
154 .pr_drain = sctp_drain,
155 .pr_usrreqs = &sctp_usrreqs
158 .pr_type = SOCK_STREAM,
159 .pr_domain = &inetdomain,
160 .pr_protocol = IPPROTO_SCTP,
161 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
162 .pr_input = sctp_input,
163 .pr_ctlinput = sctp_ctlinput,
164 .pr_ctloutput = sctp_ctloutput,
165 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */
166 .pr_usrreqs = &sctp_usrreqs
170 .pr_type = SOCK_DGRAM,
171 .pr_domain = &inetdomain,
172 .pr_protocol = IPPROTO_UDPLITE,
173 .pr_flags = PR_ATOMIC|PR_ADDR,
174 .pr_input = udp_input,
175 .pr_ctlinput = udplite_ctlinput,
176 .pr_ctloutput = udp_ctloutput,
177 .pr_init = udplite_init,
178 .pr_usrreqs = &udp_usrreqs
182 .pr_domain = &inetdomain,
183 .pr_protocol = IPPROTO_RAW,
184 .pr_flags = PR_ATOMIC|PR_ADDR,
185 .pr_input = rip_input,
186 .pr_ctlinput = rip_ctlinput,
187 .pr_ctloutput = rip_ctloutput,
188 .pr_usrreqs = &rip_usrreqs
192 .pr_domain = &inetdomain,
193 .pr_protocol = IPPROTO_ICMP,
194 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
195 .pr_input = icmp_input,
196 .pr_ctloutput = rip_ctloutput,
197 .pr_usrreqs = &rip_usrreqs
201 .pr_domain = &inetdomain,
202 .pr_protocol = IPPROTO_IGMP,
203 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
204 .pr_input = igmp_input,
205 .pr_ctloutput = rip_ctloutput,
206 .pr_fasttimo = igmp_fasttimo,
207 .pr_slowtimo = igmp_slowtimo,
208 .pr_usrreqs = &rip_usrreqs
212 .pr_domain = &inetdomain,
213 .pr_protocol = IPPROTO_RSVP,
214 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
215 .pr_input = rsvp_input,
216 .pr_ctloutput = rip_ctloutput,
217 .pr_usrreqs = &rip_usrreqs
221 .pr_domain = &inetdomain,
222 .pr_protocol = IPPROTO_IPV4,
223 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
224 .pr_input = encap4_input,
225 .pr_ctloutput = rip_ctloutput,
226 .pr_usrreqs = &rip_usrreqs
230 .pr_domain = &inetdomain,
231 .pr_protocol = IPPROTO_MOBILE,
232 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
233 .pr_input = encap4_input,
234 .pr_ctloutput = rip_ctloutput,
235 .pr_usrreqs = &rip_usrreqs
239 .pr_domain = &inetdomain,
240 .pr_protocol = IPPROTO_ETHERIP,
241 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
242 .pr_input = encap4_input,
243 .pr_ctloutput = rip_ctloutput,
244 .pr_usrreqs = &rip_usrreqs
248 .pr_domain = &inetdomain,
249 .pr_protocol = IPPROTO_GRE,
250 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
251 .pr_input = encap4_input,
252 .pr_ctloutput = rip_ctloutput,
253 .pr_usrreqs = &rip_usrreqs
258 .pr_domain = &inetdomain,
259 .pr_protocol = IPPROTO_IPV6,
260 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
261 .pr_input = encap4_input,
262 .pr_ctloutput = rip_ctloutput,
263 .pr_usrreqs = &rip_usrreqs
268 .pr_domain = &inetdomain,
269 .pr_protocol = IPPROTO_PIM,
270 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
271 .pr_input = encap4_input,
272 .pr_ctloutput = rip_ctloutput,
273 .pr_usrreqs = &rip_usrreqs
275 /* Spacer n-times for loadable protocols. */
287 .pr_domain = &inetdomain,
288 .pr_flags = PR_ATOMIC|PR_ADDR,
289 .pr_input = rip_input,
290 .pr_ctloutput = rip_ctloutput,
292 .pr_usrreqs = &rip_usrreqs
296 struct domain inetdomain = {
297 .dom_family = AF_INET,
298 .dom_name = "internet",
299 .dom_protosw = inetsw,
300 .dom_protoswNPROTOSW = &inetsw[nitems(inetsw)],
301 .dom_rtattach = in_inithead,
303 .dom_rtdetach = in_detachhead,
305 .dom_ifattach = in_domifattach,
306 .dom_ifdetach = in_domifdetach
309 VNET_DOMAIN_SET(inet);
312 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
315 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
317 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
319 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
321 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
323 #if defined(SCTP) || defined(SCTP_SUPPORT)
324 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
327 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
329 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
330 /* XXX no protocol # to use, pick something "reserved" */
331 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
333 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
335 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
337 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
339 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
342 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
344 SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,