in_proto.c revision 193731
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 193731 2009-06-08 17:15:40Z zec $"); 34 35#include "opt_ipx.h" 36#include "opt_mrouting.h" 37#include "opt_ipsec.h" 38#include "opt_inet6.h" 39#include "opt_route.h" 40#include "opt_pf.h" 41#include "opt_carp.h" 42#include "opt_sctp.h" 43#include "opt_mpath.h" 44 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/kernel.h> 48#include <sys/socket.h> 49#include <sys/domain.h> 50#include <sys/proc.h> 51#include <sys/protosw.h> 52#include <sys/queue.h> 53#include <sys/sysctl.h> 54 55#include <net/if.h> 56#include <net/route.h> 57#ifdef RADIX_MPATH 58#include <net/radix_mpath.h> 59#endif 60 61#include <netinet/in.h> 62#include <netinet/in_systm.h> 63#include <netinet/in_var.h> 64#include <netinet/ip.h> 65#include <netinet/ip_var.h> 66#include <netinet/ip_icmp.h> 67#include <netinet/igmp_var.h> 68#include <netinet/tcp.h> 69#include <netinet/tcp_timer.h> 70#include <netinet/tcp_var.h> 71#include <netinet/udp.h> 72#include <netinet/udp_var.h> 73#include <netinet/ip_encap.h> 74 75/* 76 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 77 */ 78 79static struct pr_usrreqs nousrreqs; 80 81#ifdef IPSEC 82#include <netipsec/ipsec.h> 83#endif /* IPSEC */ 84 85#ifdef SCTP 86#include <netinet/in_pcb.h> 87#include <netinet/sctp_pcb.h> 88#include <netinet/sctp.h> 89#include <netinet/sctp_var.h> 90#endif /* SCTP */ 91 92#ifdef DEV_PFSYNC 93#include <net/pfvar.h> 94#include <net/if_pfsync.h> 95#endif 96 97#ifdef DEV_CARP 98#include <netinet/ip_carp.h> 99#endif 100 101extern struct domain inetdomain; 102 103/* Spacer for loadable protocols. */ 104#define IPPROTOSPACER \ 105{ \ 106 .pr_domain = &inetdomain, \ 107 .pr_protocol = PROTO_SPACER, \ 108 .pr_usrreqs = &nousrreqs \ 109} 110 111struct protosw inetsw[] = { 112{ 113 .pr_type = 0, 114 .pr_domain = &inetdomain, 115 .pr_protocol = IPPROTO_IP, 116 .pr_init = ip_init, 117 .pr_slowtimo = ip_slowtimo, 118 .pr_drain = ip_drain, 119 .pr_usrreqs = &nousrreqs 120}, 121{ 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 = ip_ctloutput, 129 .pr_init = udp_init, 130#ifdef VIMAGE 131 .pr_destroy = udp_destroy, 132#endif 133 .pr_usrreqs = &udp_usrreqs 134}, 135{ 136 .pr_type = SOCK_STREAM, 137 .pr_domain = &inetdomain, 138 .pr_protocol = IPPROTO_TCP, 139 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 140 .pr_input = tcp_input, 141 .pr_ctlinput = tcp_ctlinput, 142 .pr_ctloutput = tcp_ctloutput, 143 .pr_init = tcp_init, 144#ifdef VIMAGE 145 .pr_destroy = tcp_destroy, 146#endif 147 .pr_slowtimo = tcp_slowtimo, 148 .pr_drain = tcp_drain, 149 .pr_usrreqs = &tcp_usrreqs 150}, 151#ifdef SCTP 152{ 153 .pr_type = SOCK_DGRAM, 154 .pr_domain = &inetdomain, 155 .pr_protocol = IPPROTO_SCTP, 156 .pr_flags = PR_WANTRCVD, 157 .pr_input = sctp_input, 158 .pr_ctlinput = sctp_ctlinput, 159 .pr_ctloutput = sctp_ctloutput, 160 .pr_init = sctp_init, 161 .pr_drain = sctp_drain, 162 .pr_usrreqs = &sctp_usrreqs 163}, 164{ 165 .pr_type = SOCK_SEQPACKET, 166 .pr_domain = &inetdomain, 167 .pr_protocol = IPPROTO_SCTP, 168 .pr_flags = PR_WANTRCVD, 169 .pr_input = sctp_input, 170 .pr_ctlinput = sctp_ctlinput, 171 .pr_ctloutput = sctp_ctloutput, 172 .pr_drain = sctp_drain, 173 .pr_usrreqs = &sctp_usrreqs 174}, 175 176{ 177 .pr_type = SOCK_STREAM, 178 .pr_domain = &inetdomain, 179 .pr_protocol = IPPROTO_SCTP, 180 .pr_flags = PR_WANTRCVD, 181 .pr_input = sctp_input, 182 .pr_ctlinput = sctp_ctlinput, 183 .pr_ctloutput = sctp_ctloutput, 184 .pr_drain = sctp_drain, 185 .pr_usrreqs = &sctp_usrreqs 186}, 187#endif /* SCTP */ 188{ 189 .pr_type = SOCK_RAW, 190 .pr_domain = &inetdomain, 191 .pr_protocol = IPPROTO_RAW, 192 .pr_flags = PR_ATOMIC|PR_ADDR, 193 .pr_input = rip_input, 194 .pr_ctlinput = rip_ctlinput, 195 .pr_ctloutput = rip_ctloutput, 196 .pr_usrreqs = &rip_usrreqs 197}, 198{ 199 .pr_type = SOCK_RAW, 200 .pr_domain = &inetdomain, 201 .pr_protocol = IPPROTO_ICMP, 202 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 203 .pr_input = icmp_input, 204 .pr_ctloutput = rip_ctloutput, 205 .pr_init = icmp_init, 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_fasttimo = igmp_fasttimo, 216 .pr_slowtimo = igmp_slowtimo, 217 .pr_usrreqs = &rip_usrreqs 218}, 219{ 220 .pr_type = SOCK_RAW, 221 .pr_domain = &inetdomain, 222 .pr_protocol = IPPROTO_RSVP, 223 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 224 .pr_input = rsvp_input, 225 .pr_ctloutput = rip_ctloutput, 226 .pr_usrreqs = &rip_usrreqs 227}, 228#ifdef IPSEC 229{ 230 .pr_type = SOCK_RAW, 231 .pr_domain = &inetdomain, 232 .pr_protocol = IPPROTO_AH, 233 .pr_flags = PR_ATOMIC|PR_ADDR, 234 .pr_input = ah4_input, 235 .pr_ctlinput = ah4_ctlinput, 236 .pr_usrreqs = &nousrreqs 237}, 238{ 239 .pr_type = SOCK_RAW, 240 .pr_domain = &inetdomain, 241 .pr_protocol = IPPROTO_ESP, 242 .pr_flags = PR_ATOMIC|PR_ADDR, 243 .pr_input = esp4_input, 244 .pr_ctlinput = esp4_ctlinput, 245 .pr_usrreqs = &nousrreqs 246}, 247{ 248 .pr_type = SOCK_RAW, 249 .pr_domain = &inetdomain, 250 .pr_protocol = IPPROTO_IPCOMP, 251 .pr_flags = PR_ATOMIC|PR_ADDR, 252 .pr_input = ipcomp4_input, 253 .pr_usrreqs = &nousrreqs 254}, 255#endif /* IPSEC */ 256{ 257 .pr_type = SOCK_RAW, 258 .pr_domain = &inetdomain, 259 .pr_protocol = IPPROTO_IPV4, 260 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 261 .pr_input = encap4_input, 262 .pr_ctloutput = rip_ctloutput, 263 .pr_init = encap_init, 264 .pr_usrreqs = &rip_usrreqs 265}, 266{ 267 .pr_type = SOCK_RAW, 268 .pr_domain = &inetdomain, 269 .pr_protocol = IPPROTO_MOBILE, 270 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 271 .pr_input = encap4_input, 272 .pr_ctloutput = rip_ctloutput, 273 .pr_init = encap_init, 274 .pr_usrreqs = &rip_usrreqs 275}, 276{ 277 .pr_type = SOCK_RAW, 278 .pr_domain = &inetdomain, 279 .pr_protocol = IPPROTO_ETHERIP, 280 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 281 .pr_input = encap4_input, 282 .pr_ctloutput = rip_ctloutput, 283 .pr_init = encap_init, 284 .pr_usrreqs = &rip_usrreqs 285}, 286{ 287 .pr_type = SOCK_RAW, 288 .pr_domain = &inetdomain, 289 .pr_protocol = IPPROTO_GRE, 290 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 291 .pr_input = encap4_input, 292 .pr_ctloutput = rip_ctloutput, 293 .pr_init = encap_init, 294 .pr_usrreqs = &rip_usrreqs 295}, 296# ifdef INET6 297{ 298 .pr_type = SOCK_RAW, 299 .pr_domain = &inetdomain, 300 .pr_protocol = IPPROTO_IPV6, 301 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 302 .pr_input = encap4_input, 303 .pr_ctloutput = rip_ctloutput, 304 .pr_init = encap_init, 305 .pr_usrreqs = &rip_usrreqs 306}, 307#endif 308{ 309 .pr_type = SOCK_RAW, 310 .pr_domain = &inetdomain, 311 .pr_protocol = IPPROTO_PIM, 312 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 313 .pr_input = encap4_input, 314 .pr_ctloutput = rip_ctloutput, 315 .pr_usrreqs = &rip_usrreqs 316}, 317#ifdef DEV_PFSYNC 318{ 319 .pr_type = SOCK_RAW, 320 .pr_domain = &inetdomain, 321 .pr_protocol = IPPROTO_PFSYNC, 322 .pr_flags = PR_ATOMIC|PR_ADDR, 323 .pr_input = pfsync_input, 324 .pr_ctloutput = rip_ctloutput, 325 .pr_usrreqs = &rip_usrreqs 326}, 327#endif /* DEV_PFSYNC */ 328#ifdef DEV_CARP 329{ 330 .pr_type = SOCK_RAW, 331 .pr_domain = &inetdomain, 332 .pr_protocol = IPPROTO_CARP, 333 .pr_flags = PR_ATOMIC|PR_ADDR, 334 .pr_input = carp_input, 335 .pr_output = (pr_output_t*)rip_output, 336 .pr_ctloutput = rip_ctloutput, 337 .pr_usrreqs = &rip_usrreqs 338}, 339#endif /* DEV_CARP */ 340/* Spacer n-times for loadable protocols. */ 341IPPROTOSPACER, 342IPPROTOSPACER, 343IPPROTOSPACER, 344IPPROTOSPACER, 345IPPROTOSPACER, 346IPPROTOSPACER, 347IPPROTOSPACER, 348IPPROTOSPACER, 349/* raw wildcard */ 350{ 351 .pr_type = SOCK_RAW, 352 .pr_domain = &inetdomain, 353 .pr_flags = PR_ATOMIC|PR_ADDR, 354 .pr_input = rip_input, 355 .pr_ctloutput = rip_ctloutput, 356 .pr_init = rip_init, 357#ifdef VIMAGE 358 .pr_destroy = rip_destroy, 359#endif 360 .pr_usrreqs = &rip_usrreqs 361}, 362}; 363 364extern int in_inithead(void **, int); 365extern int in_detachhead(void **, int); 366 367struct domain inetdomain = { 368 .dom_family = AF_INET, 369 .dom_name = "internet", 370 .dom_protosw = inetsw, 371 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 372#ifdef RADIX_MPATH 373 .dom_rtattach = rn4_mpath_inithead, 374#else 375 .dom_rtattach = in_inithead, 376#endif 377#ifdef VIMAGE 378 .dom_rtdetach = in_detachhead, 379#endif 380 .dom_rtoffset = 32, 381 .dom_maxrtkey = sizeof(struct sockaddr_in), 382 .dom_ifattach = in_domifattach, 383 .dom_ifdetach = in_domifdetach 384}; 385 386DOMAIN_SET(inet); 387 388SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 389 "Internet Family"); 390 391SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 392SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 393SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 394SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 395#ifdef SCTP 396SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 397#endif 398SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 399#ifdef IPSEC 400/* XXX no protocol # to use, pick something "reserved" */ 401SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 402SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 403SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 404SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 405SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 406#endif /* IPSEC */ 407SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 408#ifdef DEV_PFSYNC 409SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 410#endif 411#ifdef DEV_CARP 412SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 413#endif 414