in_proto.c revision 172467
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: head/sys/netinet/in_proto.c 172467 2007-10-07 20:44:24Z silby $"); 34 35#include "opt_ipx.h" 36#include "opt_mrouting.h" 37#include "opt_ipsec.h" 38#include "opt_inet6.h" 39#include "opt_pf.h" 40#include "opt_carp.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/socket.h> 47#include <sys/domain.h> 48#include <sys/protosw.h> 49#include <sys/queue.h> 50#include <sys/sysctl.h> 51 52#include <net/if.h> 53#include <net/route.h> 54 55#include <netinet/in.h> 56#include <netinet/in_systm.h> 57#include <netinet/ip.h> 58#include <netinet/ip_var.h> 59#include <netinet/ip_icmp.h> 60#include <netinet/igmp_var.h> 61#include <netinet/tcp.h> 62#include <netinet/tcp_timer.h> 63#include <netinet/tcp_var.h> 64#include <netinet/udp.h> 65#include <netinet/udp_var.h> 66#include <netinet/ip_encap.h> 67 68/* 69 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 70 */ 71 72static struct pr_usrreqs nousrreqs; 73 74#ifdef IPSEC 75#include <netipsec/ipsec.h> 76#endif /* IPSEC */ 77 78#ifdef SCTP 79#include <netinet/in_pcb.h> 80#include <netinet/sctp_pcb.h> 81#include <netinet/sctp.h> 82#include <netinet/sctp_var.h> 83#endif /* SCTP */ 84 85#ifdef DEV_PFSYNC 86#include <net/pfvar.h> 87#include <net/if_pfsync.h> 88#endif 89 90#ifdef DEV_CARP 91#include <netinet/ip_carp.h> 92#endif 93 94extern struct domain inetdomain; 95 96/* Spacer for loadable protocols. */ 97#define IPPROTOSPACER \ 98{ \ 99 .pr_domain = &inetdomain, \ 100 .pr_protocol = PROTO_SPACER, \ 101 .pr_usrreqs = &nousrreqs \ 102} 103 104struct protosw inetsw[] = { 105{ 106 .pr_type = 0, 107 .pr_domain = &inetdomain, 108 .pr_protocol = IPPROTO_IP, 109 .pr_init = ip_init, 110 .pr_slowtimo = ip_slowtimo, 111 .pr_drain = ip_drain, 112 .pr_usrreqs = &nousrreqs 113}, 114{ 115 .pr_type = SOCK_DGRAM, 116 .pr_domain = &inetdomain, 117 .pr_protocol = IPPROTO_UDP, 118 .pr_flags = PR_ATOMIC|PR_ADDR, 119 .pr_input = udp_input, 120 .pr_ctlinput = udp_ctlinput, 121 .pr_ctloutput = ip_ctloutput, 122 .pr_init = udp_init, 123 .pr_usrreqs = &udp_usrreqs 124}, 125{ 126 .pr_type = SOCK_STREAM, 127 .pr_domain = &inetdomain, 128 .pr_protocol = IPPROTO_TCP, 129 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 130 .pr_input = tcp_input, 131 .pr_ctlinput = tcp_ctlinput, 132 .pr_ctloutput = tcp_ctloutput, 133 .pr_init = tcp_init, 134 .pr_slowtimo = tcp_slowtimo, 135 .pr_drain = tcp_drain, 136 .pr_usrreqs = &tcp_usrreqs 137}, 138#ifdef SCTP 139{ 140 .pr_type = SOCK_DGRAM, 141 .pr_domain = &inetdomain, 142 .pr_protocol = IPPROTO_SCTP, 143 .pr_flags = PR_WANTRCVD, 144 .pr_input = sctp_input, 145 .pr_ctlinput = sctp_ctlinput, 146 .pr_ctloutput = sctp_ctloutput, 147 .pr_init = sctp_init, 148 .pr_drain = sctp_drain, 149 .pr_usrreqs = &sctp_usrreqs 150}, 151{ 152 .pr_type = SOCK_SEQPACKET, 153 .pr_domain = &inetdomain, 154 .pr_protocol = IPPROTO_SCTP, 155 .pr_flags = PR_WANTRCVD, 156 .pr_input = sctp_input, 157 .pr_ctlinput = sctp_ctlinput, 158 .pr_ctloutput = sctp_ctloutput, 159 .pr_drain = sctp_drain, 160 .pr_usrreqs = &sctp_usrreqs 161}, 162 163{ 164 .pr_type = SOCK_STREAM, 165 .pr_domain = &inetdomain, 166 .pr_protocol = IPPROTO_SCTP, 167 .pr_flags = PR_WANTRCVD, 168 .pr_input = sctp_input, 169 .pr_ctlinput = sctp_ctlinput, 170 .pr_ctloutput = sctp_ctloutput, 171 .pr_drain = sctp_drain, 172 .pr_usrreqs = &sctp_usrreqs 173}, 174#endif /* SCTP */ 175{ 176 .pr_type = SOCK_RAW, 177 .pr_domain = &inetdomain, 178 .pr_protocol = IPPROTO_RAW, 179 .pr_flags = PR_ATOMIC|PR_ADDR, 180 .pr_input = rip_input, 181 .pr_ctlinput = rip_ctlinput, 182 .pr_ctloutput = rip_ctloutput, 183 .pr_usrreqs = &rip_usrreqs 184}, 185{ 186 .pr_type = SOCK_RAW, 187 .pr_domain = &inetdomain, 188 .pr_protocol = IPPROTO_ICMP, 189 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 190 .pr_input = icmp_input, 191 .pr_ctloutput = rip_ctloutput, 192 .pr_usrreqs = &rip_usrreqs 193}, 194{ 195 .pr_type = SOCK_RAW, 196 .pr_domain = &inetdomain, 197 .pr_protocol = IPPROTO_IGMP, 198 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 199 .pr_input = igmp_input, 200 .pr_ctloutput = rip_ctloutput, 201 .pr_init = igmp_init, 202 .pr_fasttimo = igmp_fasttimo, 203 .pr_slowtimo = igmp_slowtimo, 204 .pr_usrreqs = &rip_usrreqs 205}, 206{ 207 .pr_type = SOCK_RAW, 208 .pr_domain = &inetdomain, 209 .pr_protocol = IPPROTO_RSVP, 210 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 211 .pr_input = rsvp_input, 212 .pr_ctloutput = rip_ctloutput, 213 .pr_usrreqs = &rip_usrreqs 214}, 215#ifdef IPSEC 216{ 217 .pr_type = SOCK_RAW, 218 .pr_domain = &inetdomain, 219 .pr_protocol = IPPROTO_AH, 220 .pr_flags = PR_ATOMIC|PR_ADDR, 221 .pr_input = ah4_input, 222 .pr_ctlinput = ah4_ctlinput, 223 .pr_usrreqs = &nousrreqs 224}, 225{ 226 .pr_type = SOCK_RAW, 227 .pr_domain = &inetdomain, 228 .pr_protocol = IPPROTO_ESP, 229 .pr_flags = PR_ATOMIC|PR_ADDR, 230 .pr_input = esp4_input, 231 .pr_ctlinput = esp4_ctlinput, 232 .pr_usrreqs = &nousrreqs 233}, 234{ 235 .pr_type = SOCK_RAW, 236 .pr_domain = &inetdomain, 237 .pr_protocol = IPPROTO_IPCOMP, 238 .pr_flags = PR_ATOMIC|PR_ADDR, 239 .pr_input = ipcomp4_input, 240 .pr_usrreqs = &nousrreqs 241}, 242#endif /* IPSEC */ 243{ 244 .pr_type = SOCK_RAW, 245 .pr_domain = &inetdomain, 246 .pr_protocol = IPPROTO_IPV4, 247 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 248 .pr_input = encap4_input, 249 .pr_ctloutput = rip_ctloutput, 250 .pr_init = encap_init, 251 .pr_usrreqs = &rip_usrreqs 252}, 253{ 254 .pr_type = SOCK_RAW, 255 .pr_domain = &inetdomain, 256 .pr_protocol = IPPROTO_MOBILE, 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_ETHERIP, 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_GRE, 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# ifdef INET6 284{ 285 .pr_type = SOCK_RAW, 286 .pr_domain = &inetdomain, 287 .pr_protocol = IPPROTO_IPV6, 288 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 289 .pr_input = encap4_input, 290 .pr_ctloutput = rip_ctloutput, 291 .pr_init = encap_init, 292 .pr_usrreqs = &rip_usrreqs 293}, 294#endif 295{ 296 .pr_type = SOCK_RAW, 297 .pr_domain = &inetdomain, 298 .pr_protocol = IPPROTO_PIM, 299 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 300 .pr_input = encap4_input, 301 .pr_ctloutput = rip_ctloutput, 302 .pr_usrreqs = &rip_usrreqs 303}, 304#ifdef DEV_PFSYNC 305{ 306 .pr_type = SOCK_RAW, 307 .pr_domain = &inetdomain, 308 .pr_protocol = IPPROTO_PFSYNC, 309 .pr_flags = PR_ATOMIC|PR_ADDR, 310 .pr_input = pfsync_input, 311 .pr_ctloutput = rip_ctloutput, 312 .pr_usrreqs = &rip_usrreqs 313}, 314#endif /* DEV_PFSYNC */ 315#ifdef DEV_CARP 316{ 317 .pr_type = SOCK_RAW, 318 .pr_domain = &inetdomain, 319 .pr_protocol = IPPROTO_CARP, 320 .pr_flags = PR_ATOMIC|PR_ADDR, 321 .pr_input = carp_input, 322 .pr_output = (pr_output_t*)rip_output, 323 .pr_ctloutput = rip_ctloutput, 324 .pr_usrreqs = &rip_usrreqs 325}, 326#endif /* DEV_CARP */ 327/* Spacer n-times for loadable protocols. */ 328IPPROTOSPACER, 329IPPROTOSPACER, 330IPPROTOSPACER, 331IPPROTOSPACER, 332IPPROTOSPACER, 333IPPROTOSPACER, 334IPPROTOSPACER, 335IPPROTOSPACER, 336/* raw wildcard */ 337{ 338 .pr_type = SOCK_RAW, 339 .pr_domain = &inetdomain, 340 .pr_flags = PR_ATOMIC|PR_ADDR, 341 .pr_input = rip_input, 342 .pr_ctloutput = rip_ctloutput, 343 .pr_init = rip_init, 344 .pr_usrreqs = &rip_usrreqs 345}, 346}; 347 348extern int in_inithead(void **, int); 349 350struct domain inetdomain = { 351 .dom_family = AF_INET, 352 .dom_name = "internet", 353 .dom_protosw = inetsw, 354 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 355 .dom_rtattach = in_inithead, 356 .dom_rtoffset = 32, 357 .dom_maxrtkey = sizeof(struct sockaddr_in) 358}; 359 360DOMAIN_SET(inet); 361 362SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 363 "Internet Family"); 364 365SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 366SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 367SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 368SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 369#ifdef SCTP 370SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 371#endif 372SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 373#ifdef IPSEC 374/* XXX no protocol # to use, pick something "reserved" */ 375SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 376SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 377SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 378SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 379SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 380#endif /* IPSEC */ 381SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 382#ifdef DEV_PFSYNC 383SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 384#endif 385#ifdef DEV_CARP 386SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 387#endif 388