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