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("$FreeBSD$"); 34 35 #include "opt_ipx.h" 36 #include "opt_mrouting.h" 37 #include "opt_ipsec.h" 38 #include "opt_inet.h" 39 #include "opt_inet6.h" 40 #include "opt_pf.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 /* 55 * While this file provides the domain and protocol switch tables for IPv4, it 56 * also provides the sysctl node declarations for net.inet.* often shared with 57 * IPv6 for common features or by upper layer protocols. In case of no IPv4 58 * support compile out everything but these sysctl nodes. 59 */ 60 #ifdef INET 61 #include <net/if.h> 62 #include <net/route.h> 63 #ifdef RADIX_MPATH 64 #include <net/radix_mpath.h> 65 #endif 66 #include <net/vnet.h> 67 #endif /* INET */ 68 69 #if defined(INET) || defined(INET6) 70 #include <netinet/in.h> 71 #endif 72 73 #ifdef INET 74 #include <netinet/in_systm.h> 75 #include <netinet/in_var.h> 76 #include <netinet/ip.h> 77 #include <netinet/ip_var.h> 78 #include <netinet/ip_icmp.h> 79 #include <netinet/igmp_var.h> 80 #include <netinet/tcp.h> 81 #include <netinet/tcp_timer.h> 82 #include <netinet/tcp_var.h> 83 #include <netinet/udp.h> 84 #include <netinet/udp_var.h> 85 #include <netinet/ip_encap.h> 86 87 /* 88 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 89 */ 90 91 static struct pr_usrreqs nousrreqs; 92 93 #ifdef IPSEC 94 #include <netipsec/ipsec.h> 95 #endif /* IPSEC */ 96 97 #ifdef SCTP 98 #include <netinet/in_pcb.h> 99 #include <netinet/sctp_pcb.h> 100 #include <netinet/sctp.h> 101 #include <netinet/sctp_var.h> 102 #endif /* SCTP */ 103 104 #ifdef DEV_PFSYNC 105 #include <net/pfvar.h> 106 #include <net/if_pfsync.h> 107 #endif 108 109 FEATURE(inet, "Internet Protocol version 4"); 110 111 extern struct domain inetdomain; 112 113 /* Spacer for loadable protocols. */ 114 #define IPPROTOSPACER \ 115 { \ 116 .pr_domain = &inetdomain, \ 117 .pr_protocol = PROTO_SPACER, \ 118 .pr_usrreqs = &nousrreqs \ 119 } 120 121 struct protosw inetsw[] = { 122 { 123 .pr_type = 0, 124 .pr_domain = &inetdomain, 125 .pr_protocol = IPPROTO_IP, 126 .pr_init = ip_init, 127 #ifdef VIMAGE 128 .pr_destroy = ip_destroy, 129 #endif 130 .pr_slowtimo = ip_slowtimo, 131 .pr_drain = ip_drain, 132 .pr_usrreqs = &nousrreqs 133 }, 134 { 135 .pr_type = SOCK_DGRAM, 136 .pr_domain = &inetdomain, 137 .pr_protocol = IPPROTO_UDP, 138 .pr_flags = PR_ATOMIC|PR_ADDR, 139 .pr_input = udp_input, 140 .pr_ctlinput = udp_ctlinput, 141 .pr_ctloutput = udp_ctloutput, 142 .pr_init = udp_init, 143 #ifdef VIMAGE 144 .pr_destroy = udp_destroy, 145 #endif 146 .pr_usrreqs = &udp_usrreqs 147 }, 148 { 149 .pr_type = SOCK_STREAM, 150 .pr_domain = &inetdomain, 151 .pr_protocol = IPPROTO_TCP, 152 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 153 .pr_input = tcp_input, 154 .pr_ctlinput = tcp_ctlinput, 155 .pr_ctloutput = tcp_ctloutput, 156 .pr_init = tcp_init, 157 #ifdef VIMAGE 158 .pr_destroy = tcp_destroy, 159 #endif 160 .pr_slowtimo = tcp_slowtimo, 161 .pr_drain = tcp_drain, 162 .pr_usrreqs = &tcp_usrreqs 163 }, 164 #ifdef SCTP 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_init = sctp_init, 174 #ifdef VIMAGE 175 .pr_destroy = sctp_finish, 176 #endif 177 .pr_drain = sctp_drain, 178 .pr_usrreqs = &sctp_usrreqs 179 }, 180 { 181 .pr_type = SOCK_STREAM, 182 .pr_domain = &inetdomain, 183 .pr_protocol = IPPROTO_SCTP, 184 .pr_flags = PR_WANTRCVD, 185 .pr_input = sctp_input, 186 .pr_ctlinput = sctp_ctlinput, 187 .pr_ctloutput = sctp_ctloutput, 188 .pr_drain = sctp_drain, 189 .pr_usrreqs = &sctp_usrreqs 190 }, 191 #endif /* SCTP */ 192 { 193 .pr_type = SOCK_RAW, 194 .pr_domain = &inetdomain, 195 .pr_protocol = IPPROTO_RAW, 196 .pr_flags = PR_ATOMIC|PR_ADDR, 197 .pr_input = rip_input, 198 .pr_ctlinput = rip_ctlinput, 199 .pr_ctloutput = rip_ctloutput, 200 .pr_usrreqs = &rip_usrreqs 201 }, 202 { 203 .pr_type = SOCK_RAW, 204 .pr_domain = &inetdomain, 205 .pr_protocol = IPPROTO_ICMP, 206 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 207 .pr_input = icmp_input, 208 .pr_ctloutput = rip_ctloutput, 209 .pr_usrreqs = &rip_usrreqs 210 }, 211 { 212 .pr_type = SOCK_RAW, 213 .pr_domain = &inetdomain, 214 .pr_protocol = IPPROTO_IGMP, 215 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 216 .pr_input = igmp_input, 217 .pr_ctloutput = rip_ctloutput, 218 .pr_fasttimo = igmp_fasttimo, 219 .pr_slowtimo = igmp_slowtimo, 220 .pr_usrreqs = &rip_usrreqs 221 }, 222 { 223 .pr_type = SOCK_RAW, 224 .pr_domain = &inetdomain, 225 .pr_protocol = IPPROTO_RSVP, 226 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 227 .pr_input = rsvp_input, 228 .pr_ctloutput = rip_ctloutput, 229 .pr_usrreqs = &rip_usrreqs 230 }, 231 #ifdef IPSEC 232 { 233 .pr_type = SOCK_RAW, 234 .pr_domain = &inetdomain, 235 .pr_protocol = IPPROTO_AH, 236 .pr_flags = PR_ATOMIC|PR_ADDR, 237 .pr_input = ah4_input, 238 .pr_ctlinput = ah4_ctlinput, 239 .pr_usrreqs = &nousrreqs 240 }, 241 { 242 .pr_type = SOCK_RAW, 243 .pr_domain = &inetdomain, 244 .pr_protocol = IPPROTO_ESP, 245 .pr_flags = PR_ATOMIC|PR_ADDR, 246 .pr_input = esp4_input, 247 .pr_ctlinput = esp4_ctlinput, 248 .pr_usrreqs = &nousrreqs 249 }, 250 { 251 .pr_type = SOCK_RAW, 252 .pr_domain = &inetdomain, 253 .pr_protocol = IPPROTO_IPCOMP, 254 .pr_flags = PR_ATOMIC|PR_ADDR, 255 .pr_input = ipcomp4_input, 256 .pr_usrreqs = &nousrreqs 257 }, 258 #endif /* IPSEC */ 259 { 260 .pr_type = SOCK_RAW, 261 .pr_domain = &inetdomain, 262 .pr_protocol = IPPROTO_IPV4, 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_MOBILE, 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_ETHERIP, 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 { 290 .pr_type = SOCK_RAW, 291 .pr_domain = &inetdomain, 292 .pr_protocol = IPPROTO_GRE, 293 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 294 .pr_input = encap4_input, 295 .pr_ctloutput = rip_ctloutput, 296 .pr_init = encap_init, 297 .pr_usrreqs = &rip_usrreqs 298 }, 299 # ifdef INET6 300 { 301 .pr_type = SOCK_RAW, 302 .pr_domain = &inetdomain, 303 .pr_protocol = IPPROTO_IPV6, 304 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 305 .pr_input = encap4_input, 306 .pr_ctloutput = rip_ctloutput, 307 .pr_init = encap_init, 308 .pr_usrreqs = &rip_usrreqs 309 }, 310 #endif 311 { 312 .pr_type = SOCK_RAW, 313 .pr_domain = &inetdomain, 314 .pr_protocol = IPPROTO_PIM, 315 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 316 .pr_input = encap4_input, 317 .pr_ctloutput = rip_ctloutput, 318 .pr_usrreqs = &rip_usrreqs 319 }, 320 #ifdef DEV_PFSYNC 321 { 322 .pr_type = SOCK_RAW, 323 .pr_domain = &inetdomain, 324 .pr_protocol = IPPROTO_PFSYNC, 325 .pr_flags = PR_ATOMIC|PR_ADDR, 326 .pr_input = pfsync_input, 327 .pr_ctloutput = rip_ctloutput, 328 .pr_usrreqs = &rip_usrreqs 329 }, 330 #endif /* DEV_PFSYNC */ 331 /* Spacer n-times for loadable protocols. */ 332 IPPROTOSPACER, 333 IPPROTOSPACER, 334 IPPROTOSPACER, 335 IPPROTOSPACER, 336 IPPROTOSPACER, 337 IPPROTOSPACER, 338 IPPROTOSPACER, 339 IPPROTOSPACER, 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 #ifdef VIMAGE 349 .pr_destroy = rip_destroy, 350 #endif 351 .pr_usrreqs = &rip_usrreqs 352 }, 353 }; 354 355 extern int in_inithead(void **, int); 356 extern int in_detachhead(void **, int); 357 358 struct domain inetdomain = { 359 .dom_family = AF_INET, 360 .dom_name = "internet", 361 .dom_protosw = inetsw, 362 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 363 #ifdef RADIX_MPATH 364 .dom_rtattach = rn4_mpath_inithead, 365 #else 366 .dom_rtattach = in_inithead, 367 #endif 368 #ifdef VIMAGE 369 .dom_rtdetach = in_detachhead, 370 #endif 371 .dom_rtoffset = 32, 372 .dom_maxrtkey = sizeof(struct sockaddr_in), 373 .dom_ifattach = in_domifattach, 374 .dom_ifdetach = in_domifdetach 375 }; 376 377 VNET_DOMAIN_SET(inet); 378 #endif /* INET */ 379 380 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 381 "Internet Family"); 382 383 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 384 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 385 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 386 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 387 #ifdef SCTP 388 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 389 #endif 390 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 391 #ifdef IPSEC 392 /* XXX no protocol # to use, pick something "reserved" */ 393 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 394 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 395 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 396 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 397 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 398 #endif /* IPSEC */ 399 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 400 #ifdef DEV_PFSYNC 401 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 402 #endif 403