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_ctloutmsg = tcp_ctloutmsg, 140 .pr_ctloutput = tcp_ctloutput, 141 142 .pr_ctlport = tcp_ctlport, 143 .pr_init = tcp_init, 144 .pr_fasttimo = NULL, 145 .pr_slowtimo = NULL, 146 .pr_drain = tcp_drain, 147 .pr_usrreqs = &tcp_usrreqs 148 }, 149 { 150 .pr_type = SOCK_RAW, 151 .pr_domain = &inetdomain, 152 .pr_protocol = IPPROTO_RAW, 153 .pr_flags = PR_ATOMIC|PR_ADDR, 154 155 .pr_input = rip_input, 156 .pr_output = NULL, 157 .pr_ctlinput = rip_ctlinput, 158 .pr_ctloutput = rip_ctloutput, 159 160 .pr_ctlport = cpu0_ctlport, 161 .pr_usrreqs = &rip_usrreqs 162 }, 163 { 164 .pr_type = SOCK_RAW, 165 .pr_domain = &inetdomain, 166 .pr_protocol = IPPROTO_ICMP, 167 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 168 169 .pr_input = icmp_input, 170 .pr_output = NULL, 171 .pr_ctlinput = NULL, 172 .pr_ctloutput = rip_ctloutput, 173 174 .pr_usrreqs = &rip_usrreqs 175 }, 176 { 177 .pr_type = SOCK_RAW, 178 .pr_domain = &inetdomain, 179 .pr_protocol = IPPROTO_IGMP, 180 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 181 182 .pr_input = igmp_input, 183 .pr_output = NULL, 184 .pr_ctlinput = NULL, 185 .pr_ctloutput = rip_ctloutput, 186 187 .pr_init = igmp_init, 188 .pr_fasttimo = igmp_fasttimo, 189 .pr_slowtimo = igmp_slowtimo, 190 .pr_drain = NULL, 191 .pr_usrreqs = &rip_usrreqs 192 }, 193 { 194 .pr_type = SOCK_RAW, 195 .pr_domain = &inetdomain, 196 .pr_protocol = IPPROTO_RSVP, 197 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 198 199 .pr_input = rsvp_input, 200 .pr_output = NULL, 201 .pr_ctlinput = NULL, 202 .pr_ctloutput = rip_ctloutput, 203 204 .pr_usrreqs = &rip_usrreqs 205 }, 206 #ifdef IPSEC 207 { 208 .pr_type = SOCK_RAW, 209 .pr_domain = &inetdomain, 210 .pr_protocol = IPPROTO_AH, 211 .pr_flags = PR_ATOMIC|PR_ADDR, 212 213 .pr_input = ah4_input, 214 .pr_output = NULL, 215 .pr_ctlinput = NULL, 216 .pr_ctloutput = NULL, 217 218 .pr_ctlport = NULL, 219 .pr_usrreqs = &nousrreqs 220 }, 221 #ifdef IPSEC_ESP 222 { 223 .pr_type = SOCK_RAW, 224 .pr_domain = &inetdomain, 225 .pr_protocol = IPPROTO_ESP, 226 .pr_flags = PR_ATOMIC|PR_ADDR, 227 228 .pr_input = esp4_input, 229 .pr_output = NULL, 230 .pr_ctlinput = NULL, 231 .pr_ctloutput = NULL, 232 233 .pr_ctlport = NULL, 234 .pr_usrreqs = &nousrreqs 235 }, 236 #endif 237 { 238 .pr_type = SOCK_RAW, 239 .pr_domain = &inetdomain, 240 .pr_protocol = IPPROTO_IPCOMP, 241 .pr_flags = PR_ATOMIC|PR_ADDR, 242 243 .pr_input = ipcomp4_input, 244 .pr_output = 0, 245 .pr_ctlinput = NULL, 246 .pr_ctloutput = NULL, 247 248 .pr_ctlport = NULL, 249 .pr_usrreqs = &nousrreqs 250 }, 251 #endif /* IPSEC */ 252 #ifdef FAST_IPSEC 253 { 254 .pr_type = SOCK_RAW, 255 .pr_domain = &inetdomain, 256 .pr_protocol = IPPROTO_AH, 257 .pr_flags = PR_ATOMIC|PR_ADDR, 258 259 .pr_input = ipsec4_common_input, 260 .pr_output = NULL, 261 .pr_ctlinput = NULL, 262 .pr_ctloutput = NULL, 263 264 .pr_ctlport = NULL, 265 .pr_usrreqs = &nousrreqs 266 }, 267 { 268 .pr_type = SOCK_RAW, 269 .pr_domain = &inetdomain, 270 .pr_protocol = IPPROTO_ESP, 271 .pr_flags = PR_ATOMIC|PR_ADDR, 272 273 .pr_input = ipsec4_common_input, 274 .pr_output = NULL, 275 .pr_ctlinput = NULL, 276 .pr_ctloutput = NULL, 277 278 .pr_ctlport = NULL, 279 .pr_usrreqs = &nousrreqs 280 }, 281 { 282 .pr_type = SOCK_RAW, 283 .pr_domain = &inetdomain, 284 .pr_protocol = IPPROTO_IPCOMP, 285 .pr_flags = PR_ATOMIC|PR_ADDR, 286 287 .pr_input = ipsec4_common_input, 288 .pr_output = NULL, 289 .pr_ctlinput = NULL, 290 .pr_ctloutput = NULL, 291 292 .pr_ctlport = NULL, 293 .pr_usrreqs = &nousrreqs 294 }, 295 #endif /* FAST_IPSEC */ 296 { 297 .pr_type = SOCK_RAW, 298 .pr_domain = &inetdomain, 299 .pr_protocol = IPPROTO_IPV4, 300 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 301 .pr_input = encap4_input, 302 .pr_output = NULL, 303 .pr_ctlinput = NULL, 304 .pr_ctloutput = rip_ctloutput, 305 306 .pr_ctlport = NULL, 307 .pr_init = encap_init, 308 .pr_usrreqs = &rip_usrreqs 309 }, 310 { 311 .pr_type = SOCK_RAW, 312 .pr_domain = &inetdomain, 313 .pr_protocol = IPPROTO_MOBILE, 314 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 315 316 .pr_input = encap4_input, 317 .pr_output = NULL, 318 .pr_ctlinput = NULL, 319 .pr_ctloutput = rip_ctloutput, 320 321 .pr_ctlport = NULL, 322 .pr_init = encap_init, 323 .pr_usrreqs = &rip_usrreqs 324 }, 325 { 326 .pr_type = SOCK_RAW, 327 .pr_domain = &inetdomain, 328 .pr_protocol = IPPROTO_GRE, 329 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 330 331 .pr_input = encap4_input, 332 .pr_output = NULL, 333 .pr_ctlinput = NULL, 334 .pr_ctloutput = rip_ctloutput, 335 336 .pr_ctlport = NULL, 337 .pr_init = encap_init, 338 .pr_usrreqs = &rip_usrreqs 339 }, 340 #ifdef INET6 341 { 342 .pr_type = SOCK_RAW, 343 .pr_domain = &inetdomain, 344 .pr_protocol = IPPROTO_IPV6, 345 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 346 347 .pr_input = encap4_input, 348 .pr_output = NULL, 349 .pr_ctlinput = NULL, 350 .pr_ctloutput = rip_ctloutput, 351 352 .pr_ctlport = NULL, 353 .pr_init = encap_init, 354 .pr_usrreqs = &rip_usrreqs 355 }, 356 #endif 357 #ifdef IPDIVERT 358 { 359 .pr_type = SOCK_RAW, 360 .pr_domain = &inetdomain, 361 .pr_protocol = IPPROTO_DIVERT, 362 .pr_flags = PR_ATOMIC|PR_ADDR, 363 364 .pr_input = div_input, 365 .pr_output = NULL, 366 .pr_ctlinput = NULL, 367 .pr_ctloutput = ip_ctloutput, 368 369 .pr_ctlport = NULL, 370 .pr_init = div_init, 371 .pr_usrreqs = &div_usrreqs 372 }, 373 #endif 374 #ifdef PIM 375 { 376 .pr_type = SOCK_RAW, 377 .pr_domain = &inetdomain, 378 .pr_protocol = IPPROTO_PIM, 379 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 380 381 .pr_input = pim_input, 382 .pr_output = NULL, 383 .pr_ctlinput = NULL, 384 .pr_ctloutput = rip_ctloutput, 385 386 .pr_ctlport = NULL, 387 .pr_usrreqs = &rip_usrreqs 388 }, 389 #endif 390 #ifdef NPFSYNC 391 { 392 .pr_type = SOCK_RAW, 393 .pr_domain = &inetdomain, 394 .pr_protocol = IPPROTO_PFSYNC, 395 .pr_flags = PR_ATOMIC|PR_ADDR, 396 397 .pr_input = pfsync_input, 398 .pr_output = NULL, 399 .pr_ctlinput = NULL, 400 .pr_ctloutput = rip_ctloutput, 401 402 .pr_ctlport = NULL, 403 .pr_usrreqs = &rip_usrreqs 404 }, 405 #endif /* NPFSYNC */ 406 { 407 /* raw wildcard */ 408 .pr_type = SOCK_RAW, 409 .pr_domain = &inetdomain, 410 .pr_protocol = 0, 411 .pr_flags = PR_ATOMIC|PR_ADDR, 412 413 .pr_input = rip_input, 414 .pr_output = NULL, 415 .pr_ctlinput = NULL, 416 .pr_ctloutput = rip_ctloutput, 417 418 .pr_init = rip_init, 419 .pr_ctlport = NULL, 420 .pr_usrreqs = &rip_usrreqs 421 }, 422 #ifdef CARP 423 { 424 .pr_type = SOCK_RAW, 425 .pr_domain = &inetdomain, 426 .pr_protocol = IPPROTO_CARP, 427 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE, 428 429 .pr_input = carp_proto_input, 430 .pr_output = rip_output, 431 .pr_ctlinput = carp_proto_ctlinput, 432 .pr_ctloutput = rip_ctloutput, 433 434 .pr_ctlport = cpu0_ctlport, 435 .pr_usrreqs = &rip_usrreqs 436 }, 437 #endif 438 }; 439 440 static void 441 inetdomain_init(void) 442 { 443 in_pcbglobalinit(); 444 } 445 446 struct domain inetdomain = { 447 AF_INET, "internet", inetdomain_init, NULL, NULL, 448 inetsw, &inetsw[NELEM(inetsw)], 449 SLIST_ENTRY_INITIALIZER, 450 in_inithead, 32, sizeof(struct sockaddr_in), 451 }; 452 453 DOMAIN_SET(inet); 454 455 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 456 "Internet Family"); 457 458 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 459 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 460 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 461 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 462 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 463 #ifdef FAST_IPSEC 464 /* XXX no protocol # to use, pick something "reserved" */ 465 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 466 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 467 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 468 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 469 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 470 #else 471 #ifdef IPSEC 472 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 473 #endif /* IPSEC */ 474 #endif /* !FAST_IPSEC */ 475 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 476 #ifdef IPDIVERT 477 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 478 #endif 479 #ifdef PIM 480 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 481 #endif 482 #ifdef CARP 483 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 484 #endif 485