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_sctp.h" 38 #include "opt_carp.h" 39 40 #include <sys/param.h> 41 #include <sys/kernel.h> 42 #include <sys/socket.h> 43 #include <sys/domain.h> 44 #include <sys/protosw.h> 45 #include <sys/queue.h> 46 #include <sys/sysctl.h> 47 48 #include <net/if.h> 49 #include <net/route.h> 50 51 #include <netinet/in.h> 52 #include <netinet/in_systm.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 #ifdef SCTP 88 #include <netinet/in_pcb.h> 89 #include <netinet/sctp_pcb.h> 90 #include <netinet/sctp.h> 91 #include <netinet/sctp_var.h> 92 #endif /* SCTP */ 93 94 #include <net/netisr.h> /* for cpu0_soport */ 95 96 #ifdef CARP 97 #include <netinet/ip_carp.h> 98 #endif 99 100 extern struct domain inetdomain; 101 static struct pr_usrreqs nousrreqs; 102 103 struct protosw inetsw[] = { 104 { 105 .pr_type = 0, 106 .pr_domain = &inetdomain, 107 .pr_protocol = 0, 108 .pr_flags = 0, 109 110 .pr_ctlport = NULL, 111 112 .pr_init = ip_init, 113 .pr_fasttimo = NULL, 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|PR_MPSAFE| 123 PR_ASYNC_SEND|PR_ASEND_HOLDTD, 124 125 .pr_input = udp_input, 126 .pr_output = NULL, 127 .pr_ctlinput = udp_ctlinput, 128 .pr_ctloutput = ip_ctloutput, 129 130 .pr_ctlport = udp_ctlport, 131 .pr_init = udp_init, 132 .pr_usrreqs = &udp_usrreqs 133 }, 134 { 135 .pr_type = SOCK_STREAM, 136 .pr_domain = &inetdomain, 137 .pr_protocol = IPPROTO_TCP, 138 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_MPSAFE| 139 PR_ASYNC_SEND|PR_ASYNC_RCVD|PR_ACONN_HOLDTD, 140 141 .pr_initport = tcp_initport, 142 .pr_input = tcp_input, 143 .pr_output = NULL, 144 .pr_ctlinput = tcp_ctlinput, 145 .pr_ctloutput = tcp_ctloutput, 146 147 .pr_ctlport = tcp_ctlport, 148 .pr_init = tcp_init, 149 .pr_fasttimo = NULL, 150 .pr_slowtimo = NULL, 151 .pr_drain = tcp_drain, 152 .pr_usrreqs = &tcp_usrreqs 153 }, 154 #ifdef SCTP 155 /* 156 * Order is very important here, we add the good one in 157 * in this postion so it maps to the right ip_protox[] 158 * postion for SCTP. Don't move the one above below 159 * this one or IPv6/4 compatability will break 160 */ 161 { 162 .pr_type = SOCK_DGRAM, 163 .pr_domain = &inetdomain, 164 .pr_protocol = IPPROTO_SCTP, 165 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 166 167 .pr_input = sctp_input, 168 .pr_output = NULL, 169 .pr_ctlinput = sctp_ctlinput, 170 .pr_ctloutput = sctp_ctloutput, 171 172 .pr_ctlport = cpu0_ctlport, 173 .pr_init = sctp_init, 174 .pr_drain = sctp_drain, 175 .pr_usrreqs = &sctp_usrreqs 176 }, 177 { 178 .pr_type = SOCK_SEQPACKET, 179 .pr_domain = &inetdomain, 180 .pr_protocol = IPPROTO_SCTP, 181 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 182 183 .pr_input = sctp_input, 184 .pr_output = NULL, 185 .pr_ctlinput = sctp_ctlinput, 186 .pr_ctloutput = sctp_ctloutput, 187 188 .pr_ctlport = cpu0_ctlport, 189 .pr_drain = sctp_drain, 190 .pr_usrreqs = &sctp_usrreqs 191 }, 192 193 { 194 .pr_type = SOCK_STREAM, 195 .pr_domain = &inetdomain, 196 .pr_protocol = IPPROTO_SCTP, 197 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD, 198 199 .pr_input = sctp_input, 200 .pr_output = NULL, 201 .pr_ctlinput = sctp_ctlinput, 202 .pr_ctloutput = sctp_ctloutput, 203 204 .pr_ctlport = cpu0_ctlport, 205 .pr_drain = sctp_drain, 206 .pr_usrreqs = &sctp_usrreqs 207 }, 208 #endif /* SCTP */ 209 { 210 .pr_type = SOCK_RAW, 211 .pr_domain = &inetdomain, 212 .pr_protocol = IPPROTO_RAW, 213 .pr_flags = PR_ATOMIC|PR_ADDR, 214 215 .pr_input = rip_input, 216 .pr_output = NULL, 217 .pr_ctlinput = rip_ctlinput, 218 .pr_ctloutput = rip_ctloutput, 219 220 .pr_ctlport = cpu0_ctlport, 221 .pr_usrreqs = &rip_usrreqs 222 }, 223 { 224 .pr_type = SOCK_RAW, 225 .pr_domain = &inetdomain, 226 .pr_protocol = IPPROTO_ICMP, 227 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 228 229 .pr_input = icmp_input, 230 .pr_output = NULL, 231 .pr_ctlinput = NULL, 232 .pr_ctloutput = rip_ctloutput, 233 234 .pr_usrreqs = &rip_usrreqs 235 }, 236 { 237 .pr_type = SOCK_RAW, 238 .pr_domain = &inetdomain, 239 .pr_protocol = IPPROTO_IGMP, 240 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 241 242 .pr_input = igmp_input, 243 .pr_output = NULL, 244 .pr_ctlinput = NULL, 245 .pr_ctloutput = rip_ctloutput, 246 247 .pr_init = igmp_init, 248 .pr_fasttimo = igmp_fasttimo, 249 .pr_slowtimo = igmp_slowtimo, 250 .pr_drain = NULL, 251 .pr_usrreqs = &rip_usrreqs 252 }, 253 { 254 .pr_type = SOCK_RAW, 255 .pr_domain = &inetdomain, 256 .pr_protocol = IPPROTO_RSVP, 257 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 258 259 .pr_input = rsvp_input, 260 .pr_output = NULL, 261 .pr_ctlinput = NULL, 262 .pr_ctloutput = rip_ctloutput, 263 264 .pr_usrreqs = &rip_usrreqs 265 }, 266 #ifdef IPSEC 267 { 268 .pr_type = SOCK_RAW, 269 .pr_domain = &inetdomain, 270 .pr_protocol = IPPROTO_AH, 271 .pr_flags = PR_ATOMIC|PR_ADDR, 272 273 .pr_input = ah4_input, 274 .pr_output = NULL, 275 .pr_ctlinput = NULL, 276 .pr_ctloutput = NULL, 277 278 .pr_ctlport = NULL, 279 .pr_usrreqs = &nousrreqs 280 }, 281 #ifdef IPSEC_ESP 282 { 283 .pr_type = SOCK_RAW, 284 .pr_domain = &inetdomain, 285 .pr_protocol = IPPROTO_ESP, 286 .pr_flags = PR_ATOMIC|PR_ADDR, 287 288 .pr_input = esp4_input, 289 .pr_output = NULL, 290 .pr_ctlinput = NULL, 291 .pr_ctloutput = NULL, 292 293 .pr_ctlport = NULL, 294 .pr_usrreqs = &nousrreqs 295 }, 296 #endif 297 { 298 .pr_type = SOCK_RAW, 299 .pr_domain = &inetdomain, 300 .pr_protocol = IPPROTO_IPCOMP, 301 .pr_flags = PR_ATOMIC|PR_ADDR, 302 303 .pr_input = ipcomp4_input, 304 .pr_output = 0, 305 .pr_ctlinput = NULL, 306 .pr_ctloutput = NULL, 307 308 .pr_ctlport = NULL, 309 .pr_usrreqs = &nousrreqs 310 }, 311 #endif /* IPSEC */ 312 #ifdef FAST_IPSEC 313 { 314 .pr_type = SOCK_RAW, 315 .pr_domain = &inetdomain, 316 .pr_protocol = IPPROTO_AH, 317 .pr_flags = PR_ATOMIC|PR_ADDR, 318 319 .pr_input = ipsec4_common_input, 320 .pr_output = NULL, 321 .pr_ctlinput = NULL, 322 .pr_ctloutput = NULL, 323 324 .pr_ctlport = NULL, 325 .pr_usrreqs = &nousrreqs 326 }, 327 { 328 .pr_type = SOCK_RAW, 329 .pr_domain = &inetdomain, 330 .pr_protocol = IPPROTO_ESP, 331 .pr_flags = PR_ATOMIC|PR_ADDR, 332 333 .pr_input = ipsec4_common_input, 334 .pr_output = NULL, 335 .pr_ctlinput = NULL, 336 .pr_ctloutput = NULL, 337 338 .pr_ctlport = NULL, 339 .pr_usrreqs = &nousrreqs 340 }, 341 { 342 .pr_type = SOCK_RAW, 343 .pr_domain = &inetdomain, 344 .pr_protocol = IPPROTO_IPCOMP, 345 .pr_flags = PR_ATOMIC|PR_ADDR, 346 347 .pr_input = ipsec4_common_input, 348 .pr_output = NULL, 349 .pr_ctlinput = NULL, 350 .pr_ctloutput = NULL, 351 352 .pr_ctlport = NULL, 353 .pr_usrreqs = &nousrreqs 354 }, 355 #endif /* FAST_IPSEC */ 356 { 357 .pr_type = SOCK_RAW, 358 .pr_domain = &inetdomain, 359 .pr_protocol = IPPROTO_IPV4, 360 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 361 .pr_input = encap4_input, 362 .pr_output = NULL, 363 .pr_ctlinput = NULL, 364 .pr_ctloutput = rip_ctloutput, 365 366 .pr_ctlport = NULL, 367 .pr_init = encap_init, 368 .pr_usrreqs = &rip_usrreqs 369 }, 370 { 371 .pr_type = SOCK_RAW, 372 .pr_domain = &inetdomain, 373 .pr_protocol = IPPROTO_MOBILE, 374 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 375 376 .pr_input = encap4_input, 377 .pr_output = NULL, 378 .pr_ctlinput = NULL, 379 .pr_ctloutput = rip_ctloutput, 380 381 .pr_ctlport = NULL, 382 .pr_init = encap_init, 383 .pr_usrreqs = &rip_usrreqs 384 }, 385 { 386 .pr_type = SOCK_RAW, 387 .pr_domain = &inetdomain, 388 .pr_protocol = IPPROTO_GRE, 389 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 390 391 .pr_input = encap4_input, 392 .pr_output = NULL, 393 .pr_ctlinput = NULL, 394 .pr_ctloutput = rip_ctloutput, 395 396 .pr_ctlport = NULL, 397 .pr_init = encap_init, 398 .pr_usrreqs = &rip_usrreqs 399 }, 400 #ifdef INET6 401 { 402 .pr_type = SOCK_RAW, 403 .pr_domain = &inetdomain, 404 .pr_protocol = IPPROTO_IPV6, 405 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 406 407 .pr_input = encap4_input, 408 .pr_output = NULL, 409 .pr_ctlinput = NULL, 410 .pr_ctloutput = rip_ctloutput, 411 412 .pr_ctlport = NULL, 413 .pr_init = encap_init, 414 .pr_usrreqs = &rip_usrreqs 415 }, 416 #endif 417 #ifdef IPDIVERT 418 { 419 .pr_type = SOCK_RAW, 420 .pr_domain = &inetdomain, 421 .pr_protocol = IPPROTO_DIVERT, 422 .pr_flags = PR_ATOMIC|PR_ADDR, 423 424 .pr_input = div_input, 425 .pr_output = NULL, 426 .pr_ctlinput = NULL, 427 .pr_ctloutput = ip_ctloutput, 428 429 .pr_ctlport = NULL, 430 .pr_init = div_init, 431 .pr_usrreqs = &div_usrreqs 432 }, 433 #endif 434 #ifdef PIM 435 { 436 .pr_type = SOCK_RAW, 437 .pr_domain = &inetdomain, 438 .pr_protocol = IPPROTO_PIM, 439 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 440 441 .pr_input = pim_input, 442 .pr_output = NULL, 443 .pr_ctlinput = NULL, 444 .pr_ctloutput = rip_ctloutput, 445 446 .pr_ctlport = NULL, 447 .pr_usrreqs = &rip_usrreqs 448 }, 449 #endif 450 #ifdef NPFSYNC 451 { 452 .pr_type = SOCK_RAW, 453 .pr_domain = &inetdomain, 454 .pr_protocol = IPPROTO_PFSYNC, 455 .pr_flags = PR_ATOMIC|PR_ADDR, 456 457 .pr_input = pfsync_input, 458 .pr_output = NULL, 459 .pr_ctlinput = NULL, 460 .pr_ctloutput = rip_ctloutput, 461 462 .pr_ctlport = NULL, 463 .pr_usrreqs = &rip_usrreqs 464 }, 465 #endif /* NPFSYNC */ 466 { 467 /* raw wildcard */ 468 .pr_type = SOCK_RAW, 469 .pr_domain = &inetdomain, 470 .pr_protocol = 0, 471 .pr_flags = PR_ATOMIC|PR_ADDR, 472 473 .pr_input = rip_input, 474 .pr_output = NULL, 475 .pr_ctlinput = NULL, 476 .pr_ctloutput = rip_ctloutput, 477 478 .pr_init = rip_init, 479 .pr_ctlport = NULL, 480 .pr_usrreqs = &rip_usrreqs 481 }, 482 #ifdef CARP 483 { 484 .pr_type = SOCK_RAW, 485 .pr_domain = &inetdomain, 486 .pr_protocol = IPPROTO_CARP, 487 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE, 488 489 .pr_input = carp_proto_input, 490 .pr_output = rip_output, 491 .pr_ctlinput = carp_proto_ctlinput, 492 .pr_ctloutput = rip_ctloutput, 493 494 .pr_ctlport = cpu0_ctlport, 495 .pr_usrreqs = &rip_usrreqs 496 }, 497 #endif 498 }; 499 500 struct domain inetdomain = { 501 AF_INET, "internet", NULL, NULL, NULL, 502 inetsw, &inetsw[NELEM(inetsw)], 503 SLIST_ENTRY_INITIALIZER, 504 in_inithead, 32, sizeof(struct sockaddr_in), 505 }; 506 507 DOMAIN_SET(inet); 508 509 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 510 "Internet Family"); 511 512 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 513 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 514 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 515 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 516 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 517 #ifdef FAST_IPSEC 518 /* XXX no protocol # to use, pick something "reserved" */ 519 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 520 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 521 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 522 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 523 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 524 #else 525 #ifdef IPSEC 526 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 527 #endif /* IPSEC */ 528 #endif /* !FAST_IPSEC */ 529 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 530 #ifdef IPDIVERT 531 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 532 #endif 533 #ifdef PIM 534 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 535 #endif 536 #ifdef CARP 537 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 538 #endif 539