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 * 3. 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: src/sys/netinet/in_proto.c,v 1.53.2.7 2003/08/24 08:24:38 hsu Exp $ 31 */ 32 33 #include "opt_ipdivert.h" 34 #include "opt_mrouting.h" 35 #include "opt_ipsec.h" 36 #include "opt_inet6.h" 37 #include "opt_carp.h" 38 39 #include <sys/param.h> 40 #include <sys/kernel.h> 41 #include <sys/socket.h> 42 #include <sys/domain.h> 43 #include <sys/protosw.h> 44 #include <sys/queue.h> 45 #include <sys/sysctl.h> 46 47 #include <net/if.h> 48 #include <net/route.h> 49 50 #include <netinet/in.h> 51 #include <netinet/in_systm.h> 52 #include <netinet/in_pcb.h> 53 #include <netinet/ip.h> 54 #include <netinet/ip_var.h> 55 #include <netinet/ip_icmp.h> 56 #include <netinet/igmp_var.h> 57 #ifdef PIM 58 #include <netinet/pim_var.h> 59 #endif 60 #include <netinet/tcp.h> 61 #include <netinet/tcp_timer.h> 62 #include <netinet/tcp_var.h> 63 #include <netinet/udp.h> 64 #include <netinet/udp_var.h> 65 #include <netinet/ip_encap.h> 66 #ifdef IPDIVERT 67 #include <netinet/ip_divert.h> 68 #endif 69 70 /* 71 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 72 */ 73 74 #ifdef IPSEC 75 #include <netinet6/ipsec.h> 76 #include <netinet6/ah.h> 77 #ifdef IPSEC_ESP 78 #include <netinet6/esp.h> 79 #endif 80 #include <netinet6/ipcomp.h> 81 #endif /* IPSEC */ 82 83 #ifdef FAST_IPSEC 84 #include <netproto/ipsec/ipsec.h> 85 #endif /* FAST_IPSEC */ 86 87 #include <net/netisr.h> /* for cpu0_soport */ 88 89 #ifdef CARP 90 #include <netinet/ip_carp.h> 91 #endif 92 93 extern struct domain inetdomain; 94 static struct pr_usrreqs nousrreqs; 95 96 struct protosw inetsw[] = { 97 { 98 .pr_type = 0, 99 .pr_domain = &inetdomain, 100 .pr_protocol = 0, 101 .pr_flags = 0, 102 103 .pr_ctlport = NULL, 104 105 .pr_init = ip_init, 106 .pr_fasttimo = NULL, 107 .pr_slowtimo = ip_slowtimo, 108 .pr_drain = ip_drain, 109 .pr_usrreqs = &nousrreqs 110 }, 111 { 112 .pr_type = SOCK_DGRAM, 113 .pr_domain = &inetdomain, 114 .pr_protocol = IPPROTO_UDP, 115 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE| 116 PR_ASYNC_SEND|PR_ASEND_HOLDTD|PR_ACONN_HOLDTD, 117 118 .pr_initport = udp_initport, 119 .pr_input = udp_input, 120 .pr_output = NULL, 121 .pr_ctlinput = udp_ctlinput, 122 .pr_ctloutput = udp_ctloutput, 123 124 .pr_ctlport = udp_ctlport, 125 .pr_init = udp_init, 126 .pr_usrreqs = &udp_usrreqs 127 }, 128 { 129 .pr_type = SOCK_STREAM, 130 .pr_domain = &inetdomain, 131 .pr_protocol = IPPROTO_TCP, 132 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_MPSAFE| 133 PR_ASYNC_SEND|PR_ASYNC_RCVD|PR_ACONN_HOLDTD, 134 135 .pr_initport = tcp_initport, 136 .pr_input = tcp_input, 137 .pr_output = NULL, 138 .pr_ctlinput = tcp_ctlinput, 139 .pr_ctloutput = tcp_ctloutput, 140 141 .pr_ctlport = tcp_ctlport, 142 .pr_init = tcp_init, 143 .pr_fasttimo = NULL, 144 .pr_slowtimo = NULL, 145 .pr_drain = tcp_drain, 146 .pr_usrreqs = &tcp_usrreqs 147 }, 148 { 149 .pr_type = SOCK_RAW, 150 .pr_domain = &inetdomain, 151 .pr_protocol = IPPROTO_RAW, 152 .pr_flags = PR_ATOMIC|PR_ADDR, 153 154 .pr_input = rip_input, 155 .pr_output = NULL, 156 .pr_ctlinput = rip_ctlinput, 157 .pr_ctloutput = rip_ctloutput, 158 159 .pr_ctlport = cpu0_ctlport, 160 .pr_usrreqs = &rip_usrreqs 161 }, 162 { 163 .pr_type = SOCK_RAW, 164 .pr_domain = &inetdomain, 165 .pr_protocol = IPPROTO_ICMP, 166 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 167 168 .pr_input = icmp_input, 169 .pr_output = NULL, 170 .pr_ctlinput = NULL, 171 .pr_ctloutput = rip_ctloutput, 172 173 .pr_usrreqs = &rip_usrreqs 174 }, 175 { 176 .pr_type = SOCK_RAW, 177 .pr_domain = &inetdomain, 178 .pr_protocol = IPPROTO_IGMP, 179 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 180 181 .pr_input = igmp_input, 182 .pr_output = NULL, 183 .pr_ctlinput = NULL, 184 .pr_ctloutput = rip_ctloutput, 185 186 .pr_init = igmp_init, 187 .pr_fasttimo = igmp_fasttimo, 188 .pr_slowtimo = igmp_slowtimo, 189 .pr_drain = NULL, 190 .pr_usrreqs = &rip_usrreqs 191 }, 192 { 193 .pr_type = SOCK_RAW, 194 .pr_domain = &inetdomain, 195 .pr_protocol = IPPROTO_RSVP, 196 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 197 198 .pr_input = rsvp_input, 199 .pr_output = NULL, 200 .pr_ctlinput = NULL, 201 .pr_ctloutput = rip_ctloutput, 202 203 .pr_usrreqs = &rip_usrreqs 204 }, 205 #ifdef IPSEC 206 { 207 .pr_type = SOCK_RAW, 208 .pr_domain = &inetdomain, 209 .pr_protocol = IPPROTO_AH, 210 .pr_flags = PR_ATOMIC|PR_ADDR, 211 212 .pr_input = ah4_input, 213 .pr_output = NULL, 214 .pr_ctlinput = NULL, 215 .pr_ctloutput = NULL, 216 217 .pr_ctlport = NULL, 218 .pr_usrreqs = &nousrreqs 219 }, 220 #ifdef IPSEC_ESP 221 { 222 .pr_type = SOCK_RAW, 223 .pr_domain = &inetdomain, 224 .pr_protocol = IPPROTO_ESP, 225 .pr_flags = PR_ATOMIC|PR_ADDR, 226 227 .pr_input = esp4_input, 228 .pr_output = NULL, 229 .pr_ctlinput = NULL, 230 .pr_ctloutput = NULL, 231 232 .pr_ctlport = NULL, 233 .pr_usrreqs = &nousrreqs 234 }, 235 #endif 236 { 237 .pr_type = SOCK_RAW, 238 .pr_domain = &inetdomain, 239 .pr_protocol = IPPROTO_IPCOMP, 240 .pr_flags = PR_ATOMIC|PR_ADDR, 241 242 .pr_input = ipcomp4_input, 243 .pr_output = 0, 244 .pr_ctlinput = NULL, 245 .pr_ctloutput = NULL, 246 247 .pr_ctlport = NULL, 248 .pr_usrreqs = &nousrreqs 249 }, 250 #endif /* IPSEC */ 251 #ifdef FAST_IPSEC 252 { 253 .pr_type = SOCK_RAW, 254 .pr_domain = &inetdomain, 255 .pr_protocol = IPPROTO_AH, 256 .pr_flags = PR_ATOMIC|PR_ADDR, 257 258 .pr_input = ipsec4_common_input, 259 .pr_output = NULL, 260 .pr_ctlinput = NULL, 261 .pr_ctloutput = NULL, 262 263 .pr_ctlport = NULL, 264 .pr_usrreqs = &nousrreqs 265 }, 266 { 267 .pr_type = SOCK_RAW, 268 .pr_domain = &inetdomain, 269 .pr_protocol = IPPROTO_ESP, 270 .pr_flags = PR_ATOMIC|PR_ADDR, 271 272 .pr_input = ipsec4_common_input, 273 .pr_output = NULL, 274 .pr_ctlinput = NULL, 275 .pr_ctloutput = NULL, 276 277 .pr_ctlport = NULL, 278 .pr_usrreqs = &nousrreqs 279 }, 280 { 281 .pr_type = SOCK_RAW, 282 .pr_domain = &inetdomain, 283 .pr_protocol = IPPROTO_IPCOMP, 284 .pr_flags = PR_ATOMIC|PR_ADDR, 285 286 .pr_input = ipsec4_common_input, 287 .pr_output = NULL, 288 .pr_ctlinput = NULL, 289 .pr_ctloutput = NULL, 290 291 .pr_ctlport = NULL, 292 .pr_usrreqs = &nousrreqs 293 }, 294 #endif /* FAST_IPSEC */ 295 { 296 .pr_type = SOCK_RAW, 297 .pr_domain = &inetdomain, 298 .pr_protocol = IPPROTO_IPV4, 299 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 300 .pr_input = encap4_input, 301 .pr_output = NULL, 302 .pr_ctlinput = NULL, 303 .pr_ctloutput = rip_ctloutput, 304 305 .pr_ctlport = NULL, 306 .pr_init = encap_init, 307 .pr_usrreqs = &rip_usrreqs 308 }, 309 { 310 .pr_type = SOCK_RAW, 311 .pr_domain = &inetdomain, 312 .pr_protocol = IPPROTO_MOBILE, 313 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 314 315 .pr_input = encap4_input, 316 .pr_output = NULL, 317 .pr_ctlinput = NULL, 318 .pr_ctloutput = rip_ctloutput, 319 320 .pr_ctlport = NULL, 321 .pr_init = encap_init, 322 .pr_usrreqs = &rip_usrreqs 323 }, 324 { 325 .pr_type = SOCK_RAW, 326 .pr_domain = &inetdomain, 327 .pr_protocol = IPPROTO_GRE, 328 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 329 330 .pr_input = encap4_input, 331 .pr_output = NULL, 332 .pr_ctlinput = NULL, 333 .pr_ctloutput = rip_ctloutput, 334 335 .pr_ctlport = NULL, 336 .pr_init = encap_init, 337 .pr_usrreqs = &rip_usrreqs 338 }, 339 #ifdef INET6 340 { 341 .pr_type = SOCK_RAW, 342 .pr_domain = &inetdomain, 343 .pr_protocol = IPPROTO_IPV6, 344 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 345 346 .pr_input = encap4_input, 347 .pr_output = NULL, 348 .pr_ctlinput = NULL, 349 .pr_ctloutput = rip_ctloutput, 350 351 .pr_ctlport = NULL, 352 .pr_init = encap_init, 353 .pr_usrreqs = &rip_usrreqs 354 }, 355 #endif 356 #ifdef IPDIVERT 357 { 358 .pr_type = SOCK_RAW, 359 .pr_domain = &inetdomain, 360 .pr_protocol = IPPROTO_DIVERT, 361 .pr_flags = PR_ATOMIC|PR_ADDR, 362 363 .pr_input = div_input, 364 .pr_output = NULL, 365 .pr_ctlinput = NULL, 366 .pr_ctloutput = ip_ctloutput, 367 368 .pr_ctlport = NULL, 369 .pr_init = div_init, 370 .pr_usrreqs = &div_usrreqs 371 }, 372 #endif 373 #ifdef PIM 374 { 375 .pr_type = SOCK_RAW, 376 .pr_domain = &inetdomain, 377 .pr_protocol = IPPROTO_PIM, 378 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 379 380 .pr_input = pim_input, 381 .pr_output = NULL, 382 .pr_ctlinput = NULL, 383 .pr_ctloutput = rip_ctloutput, 384 385 .pr_ctlport = NULL, 386 .pr_usrreqs = &rip_usrreqs 387 }, 388 #endif 389 #ifdef NPFSYNC 390 { 391 .pr_type = SOCK_RAW, 392 .pr_domain = &inetdomain, 393 .pr_protocol = IPPROTO_PFSYNC, 394 .pr_flags = PR_ATOMIC|PR_ADDR, 395 396 .pr_input = pfsync_input, 397 .pr_output = NULL, 398 .pr_ctlinput = NULL, 399 .pr_ctloutput = rip_ctloutput, 400 401 .pr_ctlport = NULL, 402 .pr_usrreqs = &rip_usrreqs 403 }, 404 #endif /* NPFSYNC */ 405 { 406 /* raw wildcard */ 407 .pr_type = SOCK_RAW, 408 .pr_domain = &inetdomain, 409 .pr_protocol = 0, 410 .pr_flags = PR_ATOMIC|PR_ADDR, 411 412 .pr_input = rip_input, 413 .pr_output = NULL, 414 .pr_ctlinput = NULL, 415 .pr_ctloutput = rip_ctloutput, 416 417 .pr_init = rip_init, 418 .pr_ctlport = NULL, 419 .pr_usrreqs = &rip_usrreqs 420 }, 421 #ifdef CARP 422 { 423 .pr_type = SOCK_RAW, 424 .pr_domain = &inetdomain, 425 .pr_protocol = IPPROTO_CARP, 426 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE, 427 428 .pr_input = carp_proto_input, 429 .pr_output = rip_output, 430 .pr_ctlinput = carp_proto_ctlinput, 431 .pr_ctloutput = rip_ctloutput, 432 433 .pr_ctlport = cpu0_ctlport, 434 .pr_usrreqs = &rip_usrreqs 435 }, 436 #endif 437 }; 438 439 static void 440 inetdomain_init(void) 441 { 442 in_pcbglobalinit(); 443 } 444 445 struct domain inetdomain = { 446 AF_INET, "internet", inetdomain_init, NULL, NULL, 447 inetsw, &inetsw[NELEM(inetsw)], 448 SLIST_ENTRY_INITIALIZER, 449 in_inithead, 32, sizeof(struct sockaddr_in), 450 }; 451 452 DOMAIN_SET(inet); 453 454 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 455 "Internet Family"); 456 457 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 458 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 459 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 460 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 461 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 462 #ifdef FAST_IPSEC 463 /* XXX no protocol # to use, pick something "reserved" */ 464 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 465 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 466 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 467 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 468 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 469 #else 470 #ifdef IPSEC 471 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 472 #endif /* IPSEC */ 473 #endif /* !FAST_IPSEC */ 474 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 475 #ifdef IPDIVERT 476 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 477 #endif 478 #ifdef PIM 479 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 480 #endif 481 #ifdef CARP 482 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 483 #endif 484