1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 32 */ 33 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD$"); 36 37#include "opt_mrouting.h" 38#include "opt_ipsec.h" 39#include "opt_inet.h" 40#include "opt_inet6.h" 41#include "opt_sctp.h" 42 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> 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/if_var.h> 63#include <net/route.h> 64#include <net/vnet.h> 65#endif /* INET */ 66 67#if defined(INET) || defined(INET6) 68#include <netinet/in.h> 69#endif 70 71#ifdef INET 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> 84 85/* 86 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 87 */ 88 89static struct pr_usrreqs nousrreqs; 90 91#ifdef SCTP 92#include <netinet/in_pcb.h> 93#include <netinet/sctp_pcb.h> 94#include <netinet/sctp.h> 95#include <netinet/sctp_var.h> 96#endif 97 98FEATURE(inet, "Internet Protocol version 4"); 99 100extern struct domain inetdomain; 101 102/* Spacer for loadable protocols. */ 103#define IPPROTOSPACER \ 104{ \ 105 .pr_domain = &inetdomain, \ 106 .pr_protocol = PROTO_SPACER, \ 107 .pr_usrreqs = &nousrreqs \ 108} 109 110struct protosw inetsw[] = { 111{ 112 .pr_type = 0, 113 .pr_domain = &inetdomain, 114 .pr_protocol = IPPROTO_IP, 115 .pr_init = ip_init, 116 .pr_slowtimo = ip_slowtimo, 117 .pr_drain = ip_drain, 118 .pr_usrreqs = &nousrreqs 119}, 120{ 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, 128 .pr_init = udp_init, 129 .pr_usrreqs = &udp_usrreqs 130}, 131{ 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, 139 .pr_init = tcp_init, 140 .pr_slowtimo = tcp_slowtimo, 141 .pr_drain = tcp_drain, 142 .pr_usrreqs = &tcp_usrreqs 143}, 144#ifdef SCTP 145{ 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 156}, 157{ 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 167}, 168#endif /* SCTP */ 169{ 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 179}, 180{ 181 .pr_type = SOCK_RAW, 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 189}, 190{ 191 .pr_type = SOCK_RAW, 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 198}, 199{ 200 .pr_type = SOCK_RAW, 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 209}, 210{ 211 .pr_type = SOCK_RAW, 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 218}, 219{ 220 .pr_type = SOCK_RAW, 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 227}, 228{ 229 .pr_type = SOCK_RAW, 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 236}, 237{ 238 .pr_type = SOCK_RAW, 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 245}, 246{ 247 .pr_type = SOCK_RAW, 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 254}, 255# ifdef INET6 256{ 257 .pr_type = SOCK_RAW, 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 264}, 265#endif 266{ 267 .pr_type = SOCK_RAW, 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 274}, 275/* Spacer n-times for loadable protocols. */ 276IPPROTOSPACER, 277IPPROTOSPACER, 278IPPROTOSPACER, 279IPPROTOSPACER, 280IPPROTOSPACER, 281IPPROTOSPACER, 282IPPROTOSPACER, 283IPPROTOSPACER, 284/* raw wildcard */ 285{ 286 .pr_type = SOCK_RAW, 287 .pr_domain = &inetdomain, 288 .pr_flags = PR_ATOMIC|PR_ADDR, 289 .pr_input = rip_input, 290 .pr_ctloutput = rip_ctloutput, 291 .pr_init = rip_init, 292 .pr_usrreqs = &rip_usrreqs 293}, 294}; 295 296struct 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, 302#ifdef VIMAGE 303 .dom_rtdetach = in_detachhead, 304#endif 305 .dom_ifattach = in_domifattach, 306 .dom_ifdetach = in_domifdetach 307}; 308 309VNET_DOMAIN_SET(inet); 310#endif /* INET */ 311 312SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 313 "Internet Family"); 314 315SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 316 "IP"); 317SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 318 "ICMP"); 319SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 320 "UDP"); 321SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 322 "TCP"); 323#if defined(SCTP) || defined(SCTP_SUPPORT) 324SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 325 "SCTP"); 326#endif 327SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 328 "IGMP"); 329#if defined(IPSEC) || defined(IPSEC_SUPPORT) 330/* XXX no protocol # to use, pick something "reserved" */ 331SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 332 "IPSEC"); 333SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 334 "AH"); 335SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 336 "ESP"); 337SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 338 "IPCOMP"); 339SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 340 "IPIP"); 341#endif /* IPSEC */ 342SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 343 "RAW"); 344SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 345 "Accept filters"); 346