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_drain = ip_drain, 107 .pr_usrreqs = &nousrreqs 108 }, 109 { 110 .pr_type = SOCK_DGRAM, 111 .pr_domain = &inetdomain, 112 .pr_protocol = IPPROTO_UDP, 113 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE| 114 PR_ASYNC_SEND|PR_ASEND_HOLDTD|PR_ACONN_HOLDTD, 115 116 .pr_initport = udp_initport, 117 .pr_input = udp_input, 118 .pr_output = NULL, 119 .pr_ctlinput = udp_ctlinput, 120 .pr_ctloutput = udp_ctloutput, 121 122 .pr_ctlport = udp_ctlport, 123 .pr_init = udp_init, 124 .pr_usrreqs = &udp_usrreqs 125 }, 126 { 127 .pr_type = SOCK_STREAM, 128 .pr_domain = &inetdomain, 129 .pr_protocol = IPPROTO_TCP, 130 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_MPSAFE| 131 PR_ASYNC_SEND|PR_ASYNC_RCVD|PR_ACONN_HOLDTD, 132 133 .pr_initport = tcp_initport, 134 .pr_input = tcp_input, 135 .pr_output = NULL, 136 .pr_ctlinput = tcp_ctlinput, 137 .pr_ctloutmsg = tcp_ctloutmsg, 138 .pr_ctloutput = tcp_ctloutput, 139 140 .pr_ctlport = tcp_ctlport, 141 .pr_init = tcp_init, 142 .pr_drain = tcp_drain, 143 .pr_usrreqs = &tcp_usrreqs 144 }, 145 { 146 .pr_type = SOCK_RAW, 147 .pr_domain = &inetdomain, 148 .pr_protocol = IPPROTO_RAW, 149 .pr_flags = PR_ATOMIC|PR_ADDR, 150 151 .pr_input = rip_input, 152 .pr_output = NULL, 153 .pr_ctlinput = rip_ctlinput, 154 .pr_ctloutput = rip_ctloutput, 155 156 .pr_ctlport = cpu0_ctlport, 157 .pr_usrreqs = &rip_usrreqs 158 }, 159 { 160 .pr_type = SOCK_RAW, 161 .pr_domain = &inetdomain, 162 .pr_protocol = IPPROTO_ICMP, 163 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 164 165 .pr_input = icmp_input, 166 .pr_output = NULL, 167 .pr_ctlinput = NULL, 168 .pr_ctloutput = rip_ctloutput, 169 170 .pr_usrreqs = &rip_usrreqs 171 }, 172 { 173 .pr_type = SOCK_RAW, 174 .pr_domain = &inetdomain, 175 .pr_protocol = IPPROTO_IGMP, 176 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 177 178 .pr_input = igmp_input, 179 .pr_output = NULL, 180 .pr_ctlinput = NULL, 181 .pr_ctloutput = rip_ctloutput, 182 183 .pr_init = igmp_init, 184 .pr_drain = NULL, 185 .pr_usrreqs = &rip_usrreqs 186 }, 187 { 188 .pr_type = SOCK_RAW, 189 .pr_domain = &inetdomain, 190 .pr_protocol = IPPROTO_RSVP, 191 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 192 193 .pr_input = rsvp_input, 194 .pr_output = NULL, 195 .pr_ctlinput = NULL, 196 .pr_ctloutput = rip_ctloutput, 197 198 .pr_usrreqs = &rip_usrreqs 199 }, 200 #ifdef IPSEC 201 { 202 .pr_type = SOCK_RAW, 203 .pr_domain = &inetdomain, 204 .pr_protocol = IPPROTO_AH, 205 .pr_flags = PR_ATOMIC|PR_ADDR, 206 207 .pr_input = ah4_input, 208 .pr_output = NULL, 209 .pr_ctlinput = NULL, 210 .pr_ctloutput = NULL, 211 212 .pr_ctlport = NULL, 213 .pr_usrreqs = &nousrreqs 214 }, 215 #ifdef IPSEC_ESP 216 { 217 .pr_type = SOCK_RAW, 218 .pr_domain = &inetdomain, 219 .pr_protocol = IPPROTO_ESP, 220 .pr_flags = PR_ATOMIC|PR_ADDR, 221 222 .pr_input = esp4_input, 223 .pr_output = NULL, 224 .pr_ctlinput = NULL, 225 .pr_ctloutput = NULL, 226 227 .pr_ctlport = NULL, 228 .pr_usrreqs = &nousrreqs 229 }, 230 #endif 231 { 232 .pr_type = SOCK_RAW, 233 .pr_domain = &inetdomain, 234 .pr_protocol = IPPROTO_IPCOMP, 235 .pr_flags = PR_ATOMIC|PR_ADDR, 236 237 .pr_input = ipcomp4_input, 238 .pr_output = 0, 239 .pr_ctlinput = NULL, 240 .pr_ctloutput = NULL, 241 242 .pr_ctlport = NULL, 243 .pr_usrreqs = &nousrreqs 244 }, 245 #endif /* IPSEC */ 246 #ifdef FAST_IPSEC 247 { 248 .pr_type = SOCK_RAW, 249 .pr_domain = &inetdomain, 250 .pr_protocol = IPPROTO_AH, 251 .pr_flags = PR_ATOMIC|PR_ADDR, 252 253 .pr_input = ipsec4_common_input, 254 .pr_output = NULL, 255 .pr_ctlinput = NULL, 256 .pr_ctloutput = NULL, 257 258 .pr_ctlport = NULL, 259 .pr_usrreqs = &nousrreqs 260 }, 261 { 262 .pr_type = SOCK_RAW, 263 .pr_domain = &inetdomain, 264 .pr_protocol = IPPROTO_ESP, 265 .pr_flags = PR_ATOMIC|PR_ADDR, 266 267 .pr_input = ipsec4_common_input, 268 .pr_output = NULL, 269 .pr_ctlinput = NULL, 270 .pr_ctloutput = NULL, 271 272 .pr_ctlport = NULL, 273 .pr_usrreqs = &nousrreqs 274 }, 275 { 276 .pr_type = SOCK_RAW, 277 .pr_domain = &inetdomain, 278 .pr_protocol = IPPROTO_IPCOMP, 279 .pr_flags = PR_ATOMIC|PR_ADDR, 280 281 .pr_input = ipsec4_common_input, 282 .pr_output = NULL, 283 .pr_ctlinput = NULL, 284 .pr_ctloutput = NULL, 285 286 .pr_ctlport = NULL, 287 .pr_usrreqs = &nousrreqs 288 }, 289 #endif /* FAST_IPSEC */ 290 { 291 .pr_type = SOCK_RAW, 292 .pr_domain = &inetdomain, 293 .pr_protocol = IPPROTO_IPV4, 294 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 295 .pr_input = encap4_input, 296 .pr_output = NULL, 297 .pr_ctlinput = NULL, 298 .pr_ctloutput = rip_ctloutput, 299 300 .pr_ctlport = NULL, 301 .pr_init = encap_init, 302 .pr_usrreqs = &rip_usrreqs 303 }, 304 { 305 .pr_type = SOCK_RAW, 306 .pr_domain = &inetdomain, 307 .pr_protocol = IPPROTO_MOBILE, 308 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 309 310 .pr_input = encap4_input, 311 .pr_output = NULL, 312 .pr_ctlinput = NULL, 313 .pr_ctloutput = rip_ctloutput, 314 315 .pr_ctlport = NULL, 316 .pr_init = encap_init, 317 .pr_usrreqs = &rip_usrreqs 318 }, 319 { 320 .pr_type = SOCK_RAW, 321 .pr_domain = &inetdomain, 322 .pr_protocol = IPPROTO_GRE, 323 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 324 325 .pr_input = encap4_input, 326 .pr_output = NULL, 327 .pr_ctlinput = NULL, 328 .pr_ctloutput = rip_ctloutput, 329 330 .pr_ctlport = NULL, 331 .pr_init = encap_init, 332 .pr_usrreqs = &rip_usrreqs 333 }, 334 #ifdef INET6 335 { 336 .pr_type = SOCK_RAW, 337 .pr_domain = &inetdomain, 338 .pr_protocol = IPPROTO_IPV6, 339 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 340 341 .pr_input = encap4_input, 342 .pr_output = NULL, 343 .pr_ctlinput = NULL, 344 .pr_ctloutput = rip_ctloutput, 345 346 .pr_ctlport = NULL, 347 .pr_init = encap_init, 348 .pr_usrreqs = &rip_usrreqs 349 }, 350 #endif 351 #ifdef IPDIVERT 352 { 353 .pr_type = SOCK_RAW, 354 .pr_domain = &inetdomain, 355 .pr_protocol = IPPROTO_DIVERT, 356 .pr_flags = PR_ATOMIC|PR_ADDR, 357 358 .pr_input = div_input, 359 .pr_output = NULL, 360 .pr_ctlinput = NULL, 361 .pr_ctloutput = ip_ctloutput, 362 363 .pr_ctlport = NULL, 364 .pr_init = div_init, 365 .pr_usrreqs = &div_usrreqs 366 }, 367 #endif 368 #ifdef PIM 369 { 370 .pr_type = SOCK_RAW, 371 .pr_domain = &inetdomain, 372 .pr_protocol = IPPROTO_PIM, 373 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 374 375 .pr_input = pim_input, 376 .pr_output = NULL, 377 .pr_ctlinput = NULL, 378 .pr_ctloutput = rip_ctloutput, 379 380 .pr_ctlport = NULL, 381 .pr_usrreqs = &rip_usrreqs 382 }, 383 #endif 384 #ifdef NPFSYNC 385 { 386 .pr_type = SOCK_RAW, 387 .pr_domain = &inetdomain, 388 .pr_protocol = IPPROTO_PFSYNC, 389 .pr_flags = PR_ATOMIC|PR_ADDR, 390 391 .pr_input = pfsync_input, 392 .pr_output = NULL, 393 .pr_ctlinput = NULL, 394 .pr_ctloutput = rip_ctloutput, 395 396 .pr_ctlport = NULL, 397 .pr_usrreqs = &rip_usrreqs 398 }, 399 #endif /* NPFSYNC */ 400 { 401 /* raw wildcard */ 402 .pr_type = SOCK_RAW, 403 .pr_domain = &inetdomain, 404 .pr_protocol = 0, 405 .pr_flags = PR_ATOMIC|PR_ADDR, 406 407 .pr_input = rip_input, 408 .pr_output = NULL, 409 .pr_ctlinput = NULL, 410 .pr_ctloutput = rip_ctloutput, 411 412 .pr_init = rip_init, 413 .pr_ctlport = NULL, 414 .pr_usrreqs = &rip_usrreqs 415 }, 416 #ifdef CARP 417 { 418 .pr_type = SOCK_RAW, 419 .pr_domain = &inetdomain, 420 .pr_protocol = IPPROTO_CARP, 421 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE, 422 423 .pr_input = carp_proto_input, 424 .pr_output = rip_output, 425 .pr_ctlinput = carp_proto_ctlinput, 426 .pr_ctloutput = rip_ctloutput, 427 428 .pr_ctlport = cpu0_ctlport, 429 .pr_usrreqs = &rip_usrreqs 430 }, 431 #endif 432 }; 433 434 static void 435 inetdomain_init(void) 436 { 437 in_pcbglobalinit(); 438 } 439 440 struct domain inetdomain = { 441 .dom_family = AF_INET, 442 .dom_name = "internet", 443 .dom_init = inetdomain_init, 444 .dom_externalize = NULL, 445 .dom_dispose = NULL, 446 .dom_protosw = inetsw, 447 .dom_protoswNPROTOSW = &inetsw[NELEM(inetsw)], 448 .dom_next = SLIST_ENTRY_INITIALIZER, 449 .dom_rtattach = in_inithead, 450 .dom_rtoffset = 32, 451 .dom_maxrtkey = sizeof(struct sockaddr_in), 452 .dom_ifattach = NULL, 453 .dom_ifdetach = NULL 454 }; 455 456 DOMAIN_SET(inet); 457 458 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 459 "Internet Family"); 460 461 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 462 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 463 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 464 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 465 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 466 #ifdef FAST_IPSEC 467 /* XXX no protocol # to use, pick something "reserved" */ 468 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 469 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 470 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 471 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 472 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 473 #else 474 #ifdef IPSEC 475 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 476 #endif /* IPSEC */ 477 #endif /* !FAST_IPSEC */ 478 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 479 #ifdef IPDIVERT 480 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 481 #endif 482 #ifdef PIM 483 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 484 #endif 485 #ifdef CARP 486 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 487 #endif 488