2 * SPDX-License-Identifier: BSD-3-Clause
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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"
42 #include "opt_mpath.h"
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/malloc.h>
48 #include <sys/socket.h>
49 #include <sys/domain.h>
51 #include <sys/protosw.h>
52 #include <sys/queue.h>
53 #include <sys/sysctl.h>
56 * While this file provides the domain and protocol switch tables for IPv4, it
57 * also provides the sysctl node declarations for net.inet.* often shared with
58 * IPv6 for common features or by upper layer protocols. In case of no IPv4
59 * support compile out everything but these sysctl nodes.
63 #include <net/if_var.h>
64 #include <net/route.h>
68 #if defined(INET) || defined(INET6)
69 #include <netinet/in.h>
73 #include <netinet/in_systm.h>
74 #include <netinet/in_var.h>
75 #include <netinet/ip.h>
76 #include <netinet/ip_var.h>
77 #include <netinet/ip_icmp.h>
78 #include <netinet/igmp_var.h>
79 #include <netinet/tcp.h>
80 #include <netinet/tcp_timer.h>
81 #include <netinet/tcp_var.h>
82 #include <netinet/udp.h>
83 #include <netinet/udp_var.h>
84 #include <netinet/ip_encap.h>
87 * TCP/IP protocol family: IP, ICMP, UDP, TCP.
90 static struct pr_usrreqs nousrreqs;
93 #include <netinet/in_pcb.h>
94 #include <netinet/sctp_pcb.h>
95 #include <netinet/sctp.h>
96 #include <netinet/sctp_var.h>
99 FEATURE(inet, "Internet Protocol version 4");
101 extern struct domain inetdomain;
103 /* Spacer for loadable protocols. */
104 #define IPPROTOSPACER \
106 .pr_domain = &inetdomain, \
107 .pr_protocol = PROTO_SPACER, \
108 .pr_usrreqs = &nousrreqs \
111 struct protosw inetsw[] = {
114 .pr_domain = &inetdomain,
115 .pr_protocol = IPPROTO_IP,
117 .pr_slowtimo = ip_slowtimo,
118 .pr_drain = ip_drain,
119 .pr_usrreqs = &nousrreqs
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,
130 .pr_usrreqs = &udp_usrreqs
133 .pr_type = SOCK_STREAM,
134 .pr_domain = &inetdomain,
135 .pr_protocol = IPPROTO_TCP,
136 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
137 .pr_input = tcp_input,
138 .pr_ctlinput = tcp_ctlinput,
139 .pr_ctloutput = tcp_ctloutput,
141 .pr_slowtimo = tcp_slowtimo,
142 .pr_drain = tcp_drain,
143 .pr_usrreqs = &tcp_usrreqs
147 .pr_type = SOCK_SEQPACKET,
148 .pr_domain = &inetdomain,
149 .pr_protocol = IPPROTO_SCTP,
150 .pr_flags = PR_WANTRCVD|PR_LASTHDR,
151 .pr_input = sctp_input,
152 .pr_ctlinput = sctp_ctlinput,
153 .pr_ctloutput = sctp_ctloutput,
154 .pr_init = sctp_init,
155 .pr_drain = sctp_drain,
156 .pr_usrreqs = &sctp_usrreqs
159 .pr_type = SOCK_STREAM,
160 .pr_domain = &inetdomain,
161 .pr_protocol = IPPROTO_SCTP,
162 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
163 .pr_input = sctp_input,
164 .pr_ctlinput = sctp_ctlinput,
165 .pr_ctloutput = sctp_ctloutput,
166 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */
167 .pr_usrreqs = &sctp_usrreqs
171 .pr_type = SOCK_DGRAM,
172 .pr_domain = &inetdomain,
173 .pr_protocol = IPPROTO_UDPLITE,
174 .pr_flags = PR_ATOMIC|PR_ADDR,
175 .pr_input = udp_input,
176 .pr_ctlinput = udplite_ctlinput,
177 .pr_ctloutput = udp_ctloutput,
178 .pr_init = udplite_init,
179 .pr_usrreqs = &udp_usrreqs
183 .pr_domain = &inetdomain,
184 .pr_protocol = IPPROTO_RAW,
185 .pr_flags = PR_ATOMIC|PR_ADDR,
186 .pr_input = rip_input,
187 .pr_ctlinput = rip_ctlinput,
188 .pr_ctloutput = rip_ctloutput,
189 .pr_usrreqs = &rip_usrreqs
193 .pr_domain = &inetdomain,
194 .pr_protocol = IPPROTO_ICMP,
195 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
196 .pr_input = icmp_input,
197 .pr_ctloutput = rip_ctloutput,
198 .pr_usrreqs = &rip_usrreqs
202 .pr_domain = &inetdomain,
203 .pr_protocol = IPPROTO_IGMP,
204 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
205 .pr_input = igmp_input,
206 .pr_ctloutput = rip_ctloutput,
207 .pr_fasttimo = igmp_fasttimo,
208 .pr_slowtimo = igmp_slowtimo,
209 .pr_usrreqs = &rip_usrreqs
213 .pr_domain = &inetdomain,
214 .pr_protocol = IPPROTO_RSVP,
215 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
216 .pr_input = rsvp_input,
217 .pr_ctloutput = rip_ctloutput,
218 .pr_usrreqs = &rip_usrreqs
222 .pr_domain = &inetdomain,
223 .pr_protocol = IPPROTO_IPV4,
224 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
225 .pr_input = encap4_input,
226 .pr_ctloutput = rip_ctloutput,
227 .pr_usrreqs = &rip_usrreqs
231 .pr_domain = &inetdomain,
232 .pr_protocol = IPPROTO_MOBILE,
233 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
234 .pr_input = encap4_input,
235 .pr_ctloutput = rip_ctloutput,
236 .pr_usrreqs = &rip_usrreqs
240 .pr_domain = &inetdomain,
241 .pr_protocol = IPPROTO_ETHERIP,
242 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
243 .pr_input = encap4_input,
244 .pr_ctloutput = rip_ctloutput,
245 .pr_usrreqs = &rip_usrreqs
249 .pr_domain = &inetdomain,
250 .pr_protocol = IPPROTO_GRE,
251 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
252 .pr_input = encap4_input,
253 .pr_ctloutput = rip_ctloutput,
254 .pr_usrreqs = &rip_usrreqs
259 .pr_domain = &inetdomain,
260 .pr_protocol = IPPROTO_IPV6,
261 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
262 .pr_input = encap4_input,
263 .pr_ctloutput = rip_ctloutput,
264 .pr_usrreqs = &rip_usrreqs
269 .pr_domain = &inetdomain,
270 .pr_protocol = IPPROTO_PIM,
271 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
272 .pr_input = encap4_input,
273 .pr_ctloutput = rip_ctloutput,
274 .pr_usrreqs = &rip_usrreqs
276 /* Spacer n-times for loadable protocols. */
288 .pr_domain = &inetdomain,
289 .pr_flags = PR_ATOMIC|PR_ADDR,
290 .pr_input = rip_input,
291 .pr_ctloutput = rip_ctloutput,
293 .pr_usrreqs = &rip_usrreqs
297 extern int in_inithead(void **, int, u_int);
298 extern int in_detachhead(void **, int);
300 struct domain inetdomain = {
301 .dom_family = AF_INET,
302 .dom_name = "internet",
303 .dom_protosw = inetsw,
304 .dom_protoswNPROTOSW = &inetsw[nitems(inetsw)],
305 .dom_rtattach = in_inithead,
307 .dom_rtdetach = in_detachhead,
309 .dom_ifattach = in_domifattach,
310 .dom_ifdetach = in_domifdetach
313 VNET_DOMAIN_SET(inet);
316 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
319 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
321 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
323 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
325 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
327 #if defined(SCTP) || defined(SCTP_SUPPORT)
328 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
331 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
333 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
334 /* XXX no protocol # to use, pick something "reserved" */
335 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
337 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
339 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
341 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
343 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
346 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
348 SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,