in_proto.c revision 185895
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 185895 2008-12-10 23:12:39Z 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_pf.h" 40#include "opt_carp.h" 41#include "opt_sctp.h" 42#include "opt_mpath.h" 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/kernel.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#include <net/if.h> 55#include <net/route.h> 56#ifdef RADIX_MPATH 57#include <net/radix_mpath.h> 58#endif 59 60#include <netinet/in.h> 61#include <netinet/in_systm.h> 62#include <netinet/ip.h> 63#include <netinet/ip_var.h> 64#include <netinet/ip_icmp.h> 65#include <netinet/igmp_var.h> 66#include <netinet/tcp.h> 67#include <netinet/tcp_timer.h> 68#include <netinet/tcp_var.h> 69#include <netinet/udp.h> 70#include <netinet/udp_var.h> 71#include <netinet/ip_encap.h> 72 73/* 74 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 75 */ 76 77static struct pr_usrreqs nousrreqs; 78 79#ifdef IPSEC 80#include <netipsec/ipsec.h> 81#endif /* IPSEC */ 82 83#ifdef SCTP 84#include <netinet/in_pcb.h> 85#include <netinet/sctp_pcb.h> 86#include <netinet/sctp.h> 87#include <netinet/sctp_var.h> 88#endif /* SCTP */ 89 90#ifdef DEV_PFSYNC 91#include <net/pfvar.h> 92#include <net/if_pfsync.h> 93#endif 94 95#ifdef DEV_CARP 96#include <netinet/ip_carp.h> 97#endif 98 99extern struct domain inetdomain; 100 101/* Spacer for loadable protocols. */ 102#define IPPROTOSPACER \ 103{ \ 104 .pr_domain = &inetdomain, \ 105 .pr_protocol = PROTO_SPACER, \ 106 .pr_usrreqs = &nousrreqs \ 107} 108 109struct protosw inetsw[] = { 110{ 111 .pr_type = 0, 112 .pr_domain = &inetdomain, 113 .pr_protocol = IPPROTO_IP, 114 .pr_init = ip_init, 115 .pr_slowtimo = ip_slowtimo, 116 .pr_drain = ip_drain, 117 .pr_usrreqs = &nousrreqs 118}, 119{ 120 .pr_type = SOCK_DGRAM, 121 .pr_domain = &inetdomain, 122 .pr_protocol = IPPROTO_UDP, 123 .pr_flags = PR_ATOMIC|PR_ADDR, 124 .pr_input = udp_input, 125 .pr_ctlinput = udp_ctlinput, 126 .pr_ctloutput = ip_ctloutput, 127 .pr_init = udp_init, 128 .pr_usrreqs = &udp_usrreqs 129}, 130{ 131 .pr_type = SOCK_STREAM, 132 .pr_domain = &inetdomain, 133 .pr_protocol = IPPROTO_TCP, 134 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 135 .pr_input = tcp_input, 136 .pr_ctlinput = tcp_ctlinput, 137 .pr_ctloutput = tcp_ctloutput, 138 .pr_init = tcp_init, 139 .pr_slowtimo = tcp_slowtimo, 140 .pr_drain = tcp_drain, 141 .pr_usrreqs = &tcp_usrreqs 142}, 143#ifdef SCTP 144{ 145 .pr_type = SOCK_DGRAM, 146 .pr_domain = &inetdomain, 147 .pr_protocol = IPPROTO_SCTP, 148 .pr_flags = PR_WANTRCVD, 149 .pr_input = sctp_input, 150 .pr_ctlinput = sctp_ctlinput, 151 .pr_ctloutput = sctp_ctloutput, 152 .pr_init = sctp_init, 153 .pr_drain = sctp_drain, 154 .pr_usrreqs = &sctp_usrreqs 155}, 156{ 157 .pr_type = SOCK_SEQPACKET, 158 .pr_domain = &inetdomain, 159 .pr_protocol = IPPROTO_SCTP, 160 .pr_flags = PR_WANTRCVD, 161 .pr_input = sctp_input, 162 .pr_ctlinput = sctp_ctlinput, 163 .pr_ctloutput = sctp_ctloutput, 164 .pr_drain = sctp_drain, 165 .pr_usrreqs = &sctp_usrreqs 166}, 167 168{ 169 .pr_type = SOCK_STREAM, 170 .pr_domain = &inetdomain, 171 .pr_protocol = IPPROTO_SCTP, 172 .pr_flags = PR_WANTRCVD, 173 .pr_input = sctp_input, 174 .pr_ctlinput = sctp_ctlinput, 175 .pr_ctloutput = sctp_ctloutput, 176 .pr_drain = sctp_drain, 177 .pr_usrreqs = &sctp_usrreqs 178}, 179#endif /* SCTP */ 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_init = icmp_init, 198 .pr_usrreqs = &rip_usrreqs 199}, 200{ 201 .pr_type = SOCK_RAW, 202 .pr_domain = &inetdomain, 203 .pr_protocol = IPPROTO_IGMP, 204 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 205 .pr_input = igmp_input, 206 .pr_ctloutput = rip_ctloutput, 207 .pr_init = igmp_init, 208 .pr_fasttimo = igmp_fasttimo, 209 .pr_slowtimo = igmp_slowtimo, 210 .pr_usrreqs = &rip_usrreqs 211}, 212{ 213 .pr_type = SOCK_RAW, 214 .pr_domain = &inetdomain, 215 .pr_protocol = IPPROTO_RSVP, 216 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 217 .pr_input = rsvp_input, 218 .pr_ctloutput = rip_ctloutput, 219 .pr_usrreqs = &rip_usrreqs 220}, 221#ifdef IPSEC 222{ 223 .pr_type = SOCK_RAW, 224 .pr_domain = &inetdomain, 225 .pr_protocol = IPPROTO_AH, 226 .pr_flags = PR_ATOMIC|PR_ADDR, 227 .pr_input = ah4_input, 228 .pr_ctlinput = ah4_ctlinput, 229 .pr_usrreqs = &nousrreqs 230}, 231{ 232 .pr_type = SOCK_RAW, 233 .pr_domain = &inetdomain, 234 .pr_protocol = IPPROTO_ESP, 235 .pr_flags = PR_ATOMIC|PR_ADDR, 236 .pr_input = esp4_input, 237 .pr_ctlinput = esp4_ctlinput, 238 .pr_usrreqs = &nousrreqs 239}, 240{ 241 .pr_type = SOCK_RAW, 242 .pr_domain = &inetdomain, 243 .pr_protocol = IPPROTO_IPCOMP, 244 .pr_flags = PR_ATOMIC|PR_ADDR, 245 .pr_input = ipcomp4_input, 246 .pr_usrreqs = &nousrreqs 247}, 248#endif /* IPSEC */ 249{ 250 .pr_type = SOCK_RAW, 251 .pr_domain = &inetdomain, 252 .pr_protocol = IPPROTO_IPV4, 253 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 254 .pr_input = encap4_input, 255 .pr_ctloutput = rip_ctloutput, 256 .pr_init = encap_init, 257 .pr_usrreqs = &rip_usrreqs 258}, 259{ 260 .pr_type = SOCK_RAW, 261 .pr_domain = &inetdomain, 262 .pr_protocol = IPPROTO_MOBILE, 263 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 264 .pr_input = encap4_input, 265 .pr_ctloutput = rip_ctloutput, 266 .pr_init = encap_init, 267 .pr_usrreqs = &rip_usrreqs 268}, 269{ 270 .pr_type = SOCK_RAW, 271 .pr_domain = &inetdomain, 272 .pr_protocol = IPPROTO_ETHERIP, 273 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 274 .pr_input = encap4_input, 275 .pr_ctloutput = rip_ctloutput, 276 .pr_init = encap_init, 277 .pr_usrreqs = &rip_usrreqs 278}, 279{ 280 .pr_type = SOCK_RAW, 281 .pr_domain = &inetdomain, 282 .pr_protocol = IPPROTO_GRE, 283 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 284 .pr_input = encap4_input, 285 .pr_ctloutput = rip_ctloutput, 286 .pr_init = encap_init, 287 .pr_usrreqs = &rip_usrreqs 288}, 289# ifdef INET6 290{ 291 .pr_type = SOCK_RAW, 292 .pr_domain = &inetdomain, 293 .pr_protocol = IPPROTO_IPV6, 294 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 295 .pr_input = encap4_input, 296 .pr_ctloutput = rip_ctloutput, 297 .pr_init = encap_init, 298 .pr_usrreqs = &rip_usrreqs 299}, 300#endif 301{ 302 .pr_type = SOCK_RAW, 303 .pr_domain = &inetdomain, 304 .pr_protocol = IPPROTO_PIM, 305 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 306 .pr_input = encap4_input, 307 .pr_ctloutput = rip_ctloutput, 308 .pr_usrreqs = &rip_usrreqs 309}, 310#ifdef DEV_PFSYNC 311{ 312 .pr_type = SOCK_RAW, 313 .pr_domain = &inetdomain, 314 .pr_protocol = IPPROTO_PFSYNC, 315 .pr_flags = PR_ATOMIC|PR_ADDR, 316 .pr_input = pfsync_input, 317 .pr_ctloutput = rip_ctloutput, 318 .pr_usrreqs = &rip_usrreqs 319}, 320#endif /* DEV_PFSYNC */ 321#ifdef DEV_CARP 322{ 323 .pr_type = SOCK_RAW, 324 .pr_domain = &inetdomain, 325 .pr_protocol = IPPROTO_CARP, 326 .pr_flags = PR_ATOMIC|PR_ADDR, 327 .pr_input = carp_input, 328 .pr_output = (pr_output_t*)rip_output, 329 .pr_ctloutput = rip_ctloutput, 330 .pr_usrreqs = &rip_usrreqs 331}, 332#endif /* DEV_CARP */ 333/* Spacer n-times for loadable protocols. */ 334IPPROTOSPACER, 335IPPROTOSPACER, 336IPPROTOSPACER, 337IPPROTOSPACER, 338IPPROTOSPACER, 339IPPROTOSPACER, 340IPPROTOSPACER, 341IPPROTOSPACER, 342/* raw wildcard */ 343{ 344 .pr_type = SOCK_RAW, 345 .pr_domain = &inetdomain, 346 .pr_flags = PR_ATOMIC|PR_ADDR, 347 .pr_input = rip_input, 348 .pr_ctloutput = rip_ctloutput, 349 .pr_init = rip_init, 350 .pr_usrreqs = &rip_usrreqs 351}, 352}; 353 354extern int in_inithead(void **, int); 355 356struct domain inetdomain = { 357 .dom_family = AF_INET, 358 .dom_name = "internet", 359 .dom_protosw = inetsw, 360 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 361#ifdef RADIX_MPATH 362 .dom_rtattach = rn4_mpath_inithead, 363#else 364 .dom_rtattach = in_inithead, 365#endif 366 .dom_rtoffset = 32, 367 .dom_maxrtkey = sizeof(struct sockaddr_in) 368}; 369 370DOMAIN_SET(inet); 371 372SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 373 "Internet Family"); 374 375SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 376SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 377SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 378SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 379#ifdef SCTP 380SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 381#endif 382SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 383#ifdef IPSEC 384/* XXX no protocol # to use, pick something "reserved" */ 385SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 386SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 387SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 388SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 389SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 390#endif /* IPSEC */ 391SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 392#ifdef DEV_PFSYNC 393SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 394#endif 395#ifdef DEV_CARP 396SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 397#endif 398