in_proto.c revision 178167
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 178167 2008-04-13 05:45:14Z qingli $"); 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/protosw.h> 50#include <sys/queue.h> 51#include <sys/sysctl.h> 52 53#include <net/if.h> 54#include <net/route.h> 55#ifdef RADIX_MPATH 56#include <net/radix_mpath.h> 57#endif 58 59#include <netinet/in.h> 60#include <netinet/in_systm.h> 61#include <netinet/ip.h> 62#include <netinet/ip_var.h> 63#include <netinet/ip_icmp.h> 64#include <netinet/igmp_var.h> 65#include <netinet/tcp.h> 66#include <netinet/tcp_timer.h> 67#include <netinet/tcp_var.h> 68#include <netinet/udp.h> 69#include <netinet/udp_var.h> 70#include <netinet/ip_encap.h> 71 72/* 73 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 74 */ 75 76static struct pr_usrreqs nousrreqs; 77 78#ifdef IPSEC 79#include <netipsec/ipsec.h> 80#endif /* IPSEC */ 81 82#ifdef SCTP 83#include <netinet/in_pcb.h> 84#include <netinet/sctp_pcb.h> 85#include <netinet/sctp.h> 86#include <netinet/sctp_var.h> 87#endif /* SCTP */ 88 89#ifdef DEV_PFSYNC 90#include <net/pfvar.h> 91#include <net/if_pfsync.h> 92#endif 93 94#ifdef DEV_CARP 95#include <netinet/ip_carp.h> 96#endif 97 98extern struct domain inetdomain; 99 100/* Spacer for loadable protocols. */ 101#define IPPROTOSPACER \ 102{ \ 103 .pr_domain = &inetdomain, \ 104 .pr_protocol = PROTO_SPACER, \ 105 .pr_usrreqs = &nousrreqs \ 106} 107 108struct protosw inetsw[] = { 109{ 110 .pr_type = 0, 111 .pr_domain = &inetdomain, 112 .pr_protocol = IPPROTO_IP, 113 .pr_init = ip_init, 114 .pr_slowtimo = ip_slowtimo, 115 .pr_drain = ip_drain, 116 .pr_usrreqs = &nousrreqs 117}, 118{ 119 .pr_type = SOCK_DGRAM, 120 .pr_domain = &inetdomain, 121 .pr_protocol = IPPROTO_UDP, 122 .pr_flags = PR_ATOMIC|PR_ADDR, 123 .pr_input = udp_input, 124 .pr_ctlinput = udp_ctlinput, 125 .pr_ctloutput = ip_ctloutput, 126 .pr_init = udp_init, 127 .pr_usrreqs = &udp_usrreqs 128}, 129{ 130 .pr_type = SOCK_STREAM, 131 .pr_domain = &inetdomain, 132 .pr_protocol = IPPROTO_TCP, 133 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 134 .pr_input = tcp_input, 135 .pr_ctlinput = tcp_ctlinput, 136 .pr_ctloutput = tcp_ctloutput, 137 .pr_init = tcp_init, 138 .pr_slowtimo = tcp_slowtimo, 139 .pr_drain = tcp_drain, 140 .pr_usrreqs = &tcp_usrreqs 141}, 142#ifdef SCTP 143{ 144 .pr_type = SOCK_DGRAM, 145 .pr_domain = &inetdomain, 146 .pr_protocol = IPPROTO_SCTP, 147 .pr_flags = PR_WANTRCVD, 148 .pr_input = sctp_input, 149 .pr_ctlinput = sctp_ctlinput, 150 .pr_ctloutput = sctp_ctloutput, 151 .pr_init = sctp_init, 152 .pr_drain = sctp_drain, 153 .pr_usrreqs = &sctp_usrreqs 154}, 155{ 156 .pr_type = SOCK_SEQPACKET, 157 .pr_domain = &inetdomain, 158 .pr_protocol = IPPROTO_SCTP, 159 .pr_flags = PR_WANTRCVD, 160 .pr_input = sctp_input, 161 .pr_ctlinput = sctp_ctlinput, 162 .pr_ctloutput = sctp_ctloutput, 163 .pr_drain = sctp_drain, 164 .pr_usrreqs = &sctp_usrreqs 165}, 166 167{ 168 .pr_type = SOCK_STREAM, 169 .pr_domain = &inetdomain, 170 .pr_protocol = IPPROTO_SCTP, 171 .pr_flags = PR_WANTRCVD, 172 .pr_input = sctp_input, 173 .pr_ctlinput = sctp_ctlinput, 174 .pr_ctloutput = sctp_ctloutput, 175 .pr_drain = sctp_drain, 176 .pr_usrreqs = &sctp_usrreqs 177}, 178#endif /* SCTP */ 179{ 180 .pr_type = SOCK_RAW, 181 .pr_domain = &inetdomain, 182 .pr_protocol = IPPROTO_RAW, 183 .pr_flags = PR_ATOMIC|PR_ADDR, 184 .pr_input = rip_input, 185 .pr_ctlinput = rip_ctlinput, 186 .pr_ctloutput = rip_ctloutput, 187 .pr_usrreqs = &rip_usrreqs 188}, 189{ 190 .pr_type = SOCK_RAW, 191 .pr_domain = &inetdomain, 192 .pr_protocol = IPPROTO_ICMP, 193 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 194 .pr_input = icmp_input, 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_IGMP, 202 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 203 .pr_input = igmp_input, 204 .pr_ctloutput = rip_ctloutput, 205 .pr_init = igmp_init, 206 .pr_fasttimo = igmp_fasttimo, 207 .pr_slowtimo = igmp_slowtimo, 208 .pr_usrreqs = &rip_usrreqs 209}, 210{ 211 .pr_type = SOCK_RAW, 212 .pr_domain = &inetdomain, 213 .pr_protocol = IPPROTO_RSVP, 214 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 215 .pr_input = rsvp_input, 216 .pr_ctloutput = rip_ctloutput, 217 .pr_usrreqs = &rip_usrreqs 218}, 219#ifdef IPSEC 220{ 221 .pr_type = SOCK_RAW, 222 .pr_domain = &inetdomain, 223 .pr_protocol = IPPROTO_AH, 224 .pr_flags = PR_ATOMIC|PR_ADDR, 225 .pr_input = ah4_input, 226 .pr_ctlinput = ah4_ctlinput, 227 .pr_usrreqs = &nousrreqs 228}, 229{ 230 .pr_type = SOCK_RAW, 231 .pr_domain = &inetdomain, 232 .pr_protocol = IPPROTO_ESP, 233 .pr_flags = PR_ATOMIC|PR_ADDR, 234 .pr_input = esp4_input, 235 .pr_ctlinput = esp4_ctlinput, 236 .pr_usrreqs = &nousrreqs 237}, 238{ 239 .pr_type = SOCK_RAW, 240 .pr_domain = &inetdomain, 241 .pr_protocol = IPPROTO_IPCOMP, 242 .pr_flags = PR_ATOMIC|PR_ADDR, 243 .pr_input = ipcomp4_input, 244 .pr_usrreqs = &nousrreqs 245}, 246#endif /* IPSEC */ 247{ 248 .pr_type = SOCK_RAW, 249 .pr_domain = &inetdomain, 250 .pr_protocol = IPPROTO_IPV4, 251 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 252 .pr_input = encap4_input, 253 .pr_ctloutput = rip_ctloutput, 254 .pr_init = encap_init, 255 .pr_usrreqs = &rip_usrreqs 256}, 257{ 258 .pr_type = SOCK_RAW, 259 .pr_domain = &inetdomain, 260 .pr_protocol = IPPROTO_MOBILE, 261 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 262 .pr_input = encap4_input, 263 .pr_ctloutput = rip_ctloutput, 264 .pr_init = encap_init, 265 .pr_usrreqs = &rip_usrreqs 266}, 267{ 268 .pr_type = SOCK_RAW, 269 .pr_domain = &inetdomain, 270 .pr_protocol = IPPROTO_ETHERIP, 271 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 272 .pr_input = encap4_input, 273 .pr_ctloutput = rip_ctloutput, 274 .pr_init = encap_init, 275 .pr_usrreqs = &rip_usrreqs 276}, 277{ 278 .pr_type = SOCK_RAW, 279 .pr_domain = &inetdomain, 280 .pr_protocol = IPPROTO_GRE, 281 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 282 .pr_input = encap4_input, 283 .pr_ctloutput = rip_ctloutput, 284 .pr_init = encap_init, 285 .pr_usrreqs = &rip_usrreqs 286}, 287# ifdef INET6 288{ 289 .pr_type = SOCK_RAW, 290 .pr_domain = &inetdomain, 291 .pr_protocol = IPPROTO_IPV6, 292 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 293 .pr_input = encap4_input, 294 .pr_ctloutput = rip_ctloutput, 295 .pr_init = encap_init, 296 .pr_usrreqs = &rip_usrreqs 297}, 298#endif 299{ 300 .pr_type = SOCK_RAW, 301 .pr_domain = &inetdomain, 302 .pr_protocol = IPPROTO_PIM, 303 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 304 .pr_input = encap4_input, 305 .pr_ctloutput = rip_ctloutput, 306 .pr_usrreqs = &rip_usrreqs 307}, 308#ifdef DEV_PFSYNC 309{ 310 .pr_type = SOCK_RAW, 311 .pr_domain = &inetdomain, 312 .pr_protocol = IPPROTO_PFSYNC, 313 .pr_flags = PR_ATOMIC|PR_ADDR, 314 .pr_input = pfsync_input, 315 .pr_ctloutput = rip_ctloutput, 316 .pr_usrreqs = &rip_usrreqs 317}, 318#endif /* DEV_PFSYNC */ 319#ifdef DEV_CARP 320{ 321 .pr_type = SOCK_RAW, 322 .pr_domain = &inetdomain, 323 .pr_protocol = IPPROTO_CARP, 324 .pr_flags = PR_ATOMIC|PR_ADDR, 325 .pr_input = carp_input, 326 .pr_output = (pr_output_t*)rip_output, 327 .pr_ctloutput = rip_ctloutput, 328 .pr_usrreqs = &rip_usrreqs 329}, 330#endif /* DEV_CARP */ 331/* Spacer n-times for loadable protocols. */ 332IPPROTOSPACER, 333IPPROTOSPACER, 334IPPROTOSPACER, 335IPPROTOSPACER, 336IPPROTOSPACER, 337IPPROTOSPACER, 338IPPROTOSPACER, 339IPPROTOSPACER, 340/* raw wildcard */ 341{ 342 .pr_type = SOCK_RAW, 343 .pr_domain = &inetdomain, 344 .pr_flags = PR_ATOMIC|PR_ADDR, 345 .pr_input = rip_input, 346 .pr_ctloutput = rip_ctloutput, 347 .pr_init = rip_init, 348 .pr_usrreqs = &rip_usrreqs 349}, 350}; 351 352extern int in_inithead(void **, int); 353 354struct domain inetdomain = { 355 .dom_family = AF_INET, 356 .dom_name = "internet", 357 .dom_protosw = inetsw, 358 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 359#ifdef RADIX_MPATH 360 .dom_rtattach = rn4_mpath_inithead, 361#else 362 .dom_rtattach = in_inithead, 363#endif 364 .dom_rtoffset = 32, 365 .dom_maxrtkey = sizeof(struct sockaddr_in) 366}; 367 368DOMAIN_SET(inet); 369 370SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 371 "Internet Family"); 372 373SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 374SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 375SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 376SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 377#ifdef SCTP 378SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 379#endif 380SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 381#ifdef IPSEC 382/* XXX no protocol # to use, pick something "reserved" */ 383SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 384SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 385SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 386SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 387SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 388#endif /* IPSEC */ 389SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 390#ifdef DEV_PFSYNC 391SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 392#endif 393#ifdef DEV_CARP 394SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 395#endif 396