in_proto.c revision 163953
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 * $FreeBSD: head/sys/netinet/in_proto.c 163953 2006-11-03 15:23:16Z rrs $ 31 */ 32 33#include "opt_ipx.h" 34#include "opt_mrouting.h" 35#include "opt_ipsec.h" 36#include "opt_inet6.h" 37#include "opt_pf.h" 38#include "opt_carp.h" 39#include "opt_sctp.h" 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/kernel.h> 44#include <sys/socket.h> 45#include <sys/domain.h> 46#include <sys/protosw.h> 47#include <sys/queue.h> 48#include <sys/sysctl.h> 49 50#include <net/if.h> 51#include <net/route.h> 52 53#include <netinet/in.h> 54#include <netinet/in_systm.h> 55#include <netinet/ip.h> 56#include <netinet/ip_var.h> 57#include <netinet/ip_icmp.h> 58#include <netinet/igmp_var.h> 59#ifdef PIM 60#include <netinet/pim_var.h> 61#endif 62#include <netinet/tcp.h> 63#include <netinet/tcp_timer.h> 64#include <netinet/tcp_var.h> 65#include <netinet/udp.h> 66#include <netinet/udp_var.h> 67#include <netinet/ip_encap.h> 68 69/* 70 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 71 */ 72 73static struct pr_usrreqs nousrreqs; 74 75#ifdef IPSEC 76#include <netinet6/ipsec.h> 77#include <netinet6/ah.h> 78#ifdef IPSEC_ESP 79#include <netinet6/esp.h> 80#endif 81#include <netinet6/ipcomp.h> 82#endif /* IPSEC */ 83 84#ifdef FAST_IPSEC 85#include <netipsec/ipsec.h> 86#endif /* FAST_IPSEC */ 87 88#ifdef IPXIP 89#include <netipx/ipx_ip.h> 90#endif 91 92#ifdef SCTP 93#include <netinet/in_pcb.h> 94#include <netinet/sctp_pcb.h> 95#include <netinet/sctp.h> 96#include <netinet/sctp_var.h> 97#endif /* SCTP */ 98 99#ifdef DEV_PFSYNC 100#include <net/pfvar.h> 101#include <net/if_pfsync.h> 102#endif 103 104#ifdef DEV_CARP 105#include <netinet/ip_carp.h> 106#endif 107 108extern struct domain inetdomain; 109 110/* Spacer for loadable protocols. */ 111#define IPPROTOSPACER \ 112{ \ 113 .pr_domain = &inetdomain, \ 114 .pr_protocol = PROTO_SPACER, \ 115 .pr_usrreqs = &nousrreqs \ 116} 117 118struct protosw inetsw[] = { 119{ 120 .pr_type = 0, 121 .pr_domain = &inetdomain, 122 .pr_protocol = IPPROTO_IP, 123 .pr_init = ip_init, 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 = ip_ctloutput, 136 .pr_init = udp_init, 137 .pr_usrreqs = &udp_usrreqs 138}, 139{ 140 .pr_type = SOCK_STREAM, 141 .pr_domain = &inetdomain, 142 .pr_protocol = IPPROTO_TCP, 143 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 144 .pr_input = tcp_input, 145 .pr_ctlinput = tcp_ctlinput, 146 .pr_ctloutput = tcp_ctloutput, 147 .pr_init = tcp_init, 148 .pr_slowtimo = tcp_slowtimo, 149 .pr_drain = tcp_drain, 150 .pr_usrreqs = &tcp_usrreqs 151}, 152#ifdef SCTP 153{ 154 .pr_type = SOCK_DGRAM, 155 .pr_domain = &inetdomain, 156 .pr_protocol = IPPROTO_SCTP, 157 .pr_flags = PR_WANTRCVD, 158 .pr_input = sctp_input, 159 .pr_ctlinput = sctp_ctlinput, 160 .pr_ctloutput = sctp_ctloutput, 161 .pr_init = sctp_init, 162 .pr_drain = sctp_drain, 163 .pr_usrreqs = &sctp_usrreqs 164}, 165{ 166 .pr_type = SOCK_SEQPACKET, 167 .pr_domain = &inetdomain, 168 .pr_protocol = IPPROTO_SCTP, 169 .pr_flags = PR_WANTRCVD, 170 .pr_input = sctp_input, 171 .pr_ctlinput = sctp_ctlinput, 172 .pr_ctloutput = sctp_ctloutput, 173 .pr_drain = sctp_drain, 174 .pr_usrreqs = &sctp_usrreqs 175}, 176 177{ 178 .pr_type = SOCK_STREAM, 179 .pr_domain = &inetdomain, 180 .pr_protocol = IPPROTO_SCTP, 181 .pr_flags = PR_WANTRCVD, 182 .pr_input = sctp_input, 183 .pr_ctlinput = sctp_ctlinput, 184 .pr_ctloutput = sctp_ctloutput, 185 .pr_drain = sctp_drain, 186 .pr_usrreqs = &sctp_usrreqs 187}, 188#endif /* SCTP */ 189{ 190 .pr_type = SOCK_RAW, 191 .pr_domain = &inetdomain, 192 .pr_protocol = IPPROTO_RAW, 193 .pr_flags = PR_ATOMIC|PR_ADDR, 194 .pr_input = rip_input, 195 .pr_ctlinput = rip_ctlinput, 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_ICMP, 203 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 204 .pr_input = icmp_input, 205 .pr_ctloutput = rip_ctloutput, 206 .pr_usrreqs = &rip_usrreqs 207}, 208{ 209 .pr_type = SOCK_RAW, 210 .pr_domain = &inetdomain, 211 .pr_protocol = IPPROTO_IGMP, 212 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 213 .pr_input = igmp_input, 214 .pr_ctloutput = rip_ctloutput, 215 .pr_init = igmp_init, 216 .pr_fasttimo = igmp_fasttimo, 217 .pr_slowtimo = igmp_slowtimo, 218 .pr_usrreqs = &rip_usrreqs 219}, 220{ 221 .pr_type = SOCK_RAW, 222 .pr_domain = &inetdomain, 223 .pr_protocol = IPPROTO_RSVP, 224 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 225 .pr_input = rsvp_input, 226 .pr_ctloutput = rip_ctloutput, 227 .pr_usrreqs = &rip_usrreqs 228}, 229#ifdef IPSEC 230{ 231 .pr_type = SOCK_RAW, 232 .pr_domain = &inetdomain, 233 .pr_protocol = IPPROTO_AH, 234 .pr_flags = PR_ATOMIC|PR_ADDR, 235 .pr_input = ah4_input, 236 .pr_usrreqs = &nousrreqs 237}, 238#ifdef IPSEC_ESP 239{ 240 .pr_type = SOCK_RAW, 241 .pr_domain = &inetdomain, 242 .pr_protocol = IPPROTO_ESP, 243 .pr_flags = PR_ATOMIC|PR_ADDR, 244 .pr_input = esp4_input, 245 .pr_usrreqs = &nousrreqs 246}, 247#endif 248{ 249 .pr_type = SOCK_RAW, 250 .pr_domain = &inetdomain, 251 .pr_protocol = IPPROTO_IPCOMP, 252 .pr_flags = PR_ATOMIC|PR_ADDR, 253 .pr_input = ipcomp4_input, 254 .pr_usrreqs = &nousrreqs 255}, 256#endif /* IPSEC */ 257#ifdef FAST_IPSEC 258{ 259 .pr_type = SOCK_RAW, 260 .pr_domain = &inetdomain, 261 .pr_protocol = IPPROTO_AH, 262 .pr_flags = PR_ATOMIC|PR_ADDR, 263 .pr_input = ah4_input, 264 .pr_ctlinput = ah4_ctlinput, 265 .pr_usrreqs = &nousrreqs 266}, 267{ 268 .pr_type = SOCK_RAW, 269 .pr_domain = &inetdomain, 270 .pr_protocol = IPPROTO_ESP, 271 .pr_flags = PR_ATOMIC|PR_ADDR, 272 .pr_input = esp4_input, 273 .pr_ctlinput = esp4_ctlinput, 274 .pr_usrreqs = &nousrreqs 275}, 276{ 277 .pr_type = SOCK_RAW, 278 .pr_domain = &inetdomain, 279 .pr_protocol = IPPROTO_IPCOMP, 280 .pr_flags = PR_ATOMIC|PR_ADDR, 281 .pr_input = ipcomp4_input, 282 .pr_usrreqs = &nousrreqs 283}, 284#endif /* FAST_IPSEC */ 285{ 286 .pr_type = SOCK_RAW, 287 .pr_domain = &inetdomain, 288 .pr_protocol = IPPROTO_IPV4, 289 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 290 .pr_input = encap4_input, 291 .pr_ctloutput = rip_ctloutput, 292 .pr_init = encap_init, 293 .pr_usrreqs = &rip_usrreqs 294}, 295{ 296 .pr_type = SOCK_RAW, 297 .pr_domain = &inetdomain, 298 .pr_protocol = IPPROTO_MOBILE, 299 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 300 .pr_input = encap4_input, 301 .pr_ctloutput = rip_ctloutput, 302 .pr_init = encap_init, 303 .pr_usrreqs = &rip_usrreqs 304}, 305{ 306 .pr_type = SOCK_RAW, 307 .pr_domain = &inetdomain, 308 .pr_protocol = IPPROTO_ETHERIP, 309 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 310 .pr_input = encap4_input, 311 .pr_ctloutput = rip_ctloutput, 312 .pr_init = encap_init, 313 .pr_usrreqs = &rip_usrreqs 314}, 315{ 316 .pr_type = SOCK_RAW, 317 .pr_domain = &inetdomain, 318 .pr_protocol = IPPROTO_GRE, 319 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 320 .pr_input = encap4_input, 321 .pr_ctloutput = rip_ctloutput, 322 .pr_init = encap_init, 323 .pr_usrreqs = &rip_usrreqs 324}, 325# ifdef INET6 326{ 327 .pr_type = SOCK_RAW, 328 .pr_domain = &inetdomain, 329 .pr_protocol = IPPROTO_IPV6, 330 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 331 .pr_input = encap4_input, 332 .pr_ctloutput = rip_ctloutput, 333 .pr_init = encap_init, 334 .pr_usrreqs = &rip_usrreqs 335}, 336#endif 337#ifdef IPXIP 338{ 339 .pr_type = SOCK_RAW, 340 .pr_domain = &inetdomain, 341 .pr_protocol = IPPROTO_IDP, 342 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 343 .pr_input = ipxip_input, 344 .pr_ctlinput = ipxip_ctlinput, 345 .pr_usrreqs = &rip_usrreqs 346}, 347#endif 348#ifdef PIM 349{ 350 .pr_type = SOCK_RAW, 351 .pr_domain = &inetdomain, 352 .pr_protocol = IPPROTO_PIM, 353 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 354 .pr_input = pim_input, 355 .pr_ctloutput = rip_ctloutput, 356 .pr_usrreqs = &rip_usrreqs 357}, 358#endif /* PIM */ 359#ifdef DEV_PFSYNC 360{ 361 .pr_type = SOCK_RAW, 362 .pr_domain = &inetdomain, 363 .pr_protocol = IPPROTO_PFSYNC, 364 .pr_flags = PR_ATOMIC|PR_ADDR, 365 .pr_input = pfsync_input, 366 .pr_ctloutput = rip_ctloutput, 367 .pr_usrreqs = &rip_usrreqs 368}, 369#endif /* DEV_PFSYNC */ 370#ifdef DEV_CARP 371{ 372 .pr_type = SOCK_RAW, 373 .pr_domain = &inetdomain, 374 .pr_protocol = IPPROTO_CARP, 375 .pr_flags = PR_ATOMIC|PR_ADDR, 376 .pr_input = carp_input, 377 .pr_output = (pr_output_t*)rip_output, 378 .pr_ctloutput = rip_ctloutput, 379 .pr_usrreqs = &rip_usrreqs 380}, 381#endif /* DEV_CARP */ 382/* Spacer n-times for loadable protocols. */ 383IPPROTOSPACER, 384IPPROTOSPACER, 385IPPROTOSPACER, 386IPPROTOSPACER, 387IPPROTOSPACER, 388IPPROTOSPACER, 389IPPROTOSPACER, 390IPPROTOSPACER, 391/* raw wildcard */ 392{ 393 .pr_type = SOCK_RAW, 394 .pr_domain = &inetdomain, 395 .pr_flags = PR_ATOMIC|PR_ADDR, 396 .pr_input = rip_input, 397 .pr_ctloutput = rip_ctloutput, 398 .pr_init = rip_init, 399 .pr_usrreqs = &rip_usrreqs 400}, 401}; 402 403extern int in_inithead(void **, int); 404 405struct domain inetdomain = { 406 .dom_family = AF_INET, 407 .dom_name = "internet", 408 .dom_protosw = inetsw, 409 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 410 .dom_rtattach = in_inithead, 411 .dom_rtoffset = 32, 412 .dom_maxrtkey = sizeof(struct sockaddr_in) 413}; 414 415DOMAIN_SET(inet); 416 417SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 418 "Internet Family"); 419 420SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 421SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 422SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 423SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 424#ifdef SCTP 425SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 426#endif 427SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 428#ifdef FAST_IPSEC 429/* XXX no protocol # to use, pick something "reserved" */ 430SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 431SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 432SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 433SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 434SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 435#else 436#ifdef IPSEC 437SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 438#endif /* IPSEC */ 439#endif /* !FAST_IPSEC */ 440SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 441#ifdef PIM 442SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 443#endif 444#ifdef DEV_PFSYNC 445SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 446#endif 447#ifdef DEV_CARP 448SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 449#endif 450