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_ipx.h" 35 #include "opt_mrouting.h" 36 #include "opt_ipsec.h" 37 #include "opt_inet6.h" 38 #include "opt_sctp.h" 39 #include "opt_carp.h" 40 41 #include <sys/param.h> 42 #include <sys/kernel.h> 43 #include <sys/socket.h> 44 #include <sys/domain.h> 45 #include <sys/protosw.h> 46 #include <sys/queue.h> 47 #include <sys/sysctl.h> 48 49 #include <net/if.h> 50 #include <net/route.h> 51 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> 54 #include <netinet/ip.h> 55 #include <netinet/ip_var.h> 56 #include <netinet/ip_icmp.h> 57 #include <netinet/igmp_var.h> 58 #ifdef PIM 59 #include <netinet/pim_var.h> 60 #endif 61 #include <netinet/tcp.h> 62 #include <netinet/tcp_timer.h> 63 #include <netinet/tcp_var.h> 64 #include <netinet/udp.h> 65 #include <netinet/udp_var.h> 66 #include <netinet/ip_encap.h> 67 #ifdef IPDIVERT 68 #include <netinet/ip_divert.h> 69 #endif 70 71 /* 72 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 73 */ 74 75 #ifdef IPSEC 76 #include <netinet6/ipsec.h> 77 #include <netinet6/ah.h> 78 #ifdef IPSEC_ESP 79 #include <netinet6/esp.h> 80 #endif 81 #include <netinet6/ipcomp.h> 82 #endif /* IPSEC */ 83 84 #ifdef FAST_IPSEC 85 #include <netproto/ipsec/ipsec.h> 86 #endif /* FAST_IPSEC */ 87 88 #ifdef IPXIP 89 #include <netproto/ipx/ipx_ip.h> 90 #endif 91 92 #ifdef SCTP 93 #include <netinet/in_pcb.h> 94 #include <netinet/sctp_pcb.h> 95 #include <netinet/sctp.h> 96 #include <netinet/sctp_var.h> 97 #endif /* SCTP */ 98 99 #include <net/netisr.h> /* for cpu0_soport */ 100 101 #ifdef CARP 102 #include <netinet/ip_carp.h> 103 #endif 104 105 extern struct domain inetdomain; 106 static struct pr_usrreqs nousrreqs; 107 108 struct protosw inetsw[] = { 109 { 110 .pr_type = 0, 111 .pr_domain = &inetdomain, 112 .pr_protocol = 0, 113 .pr_flags = 0, 114 115 .pr_ctlport = NULL, 116 117 .pr_init = ip_init, 118 .pr_fasttimo = NULL, 119 .pr_slowtimo = ip_slowtimo, 120 .pr_drain = ip_drain, 121 .pr_usrreqs = &nousrreqs 122 }, 123 { 124 .pr_type = SOCK_DGRAM, 125 .pr_domain = &inetdomain, 126 .pr_protocol = IPPROTO_UDP, 127 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE|PR_ASYNC_SEND, 128 129 .pr_input = udp_input, 130 .pr_output = NULL, 131 .pr_ctlinput = udp_ctlinput, 132 .pr_ctloutput = ip_ctloutput, 133 134 .pr_ctlport = udp_ctlport, 135 .pr_init = udp_init, 136 .pr_usrreqs = &udp_usrreqs 137 }, 138 { 139 .pr_type = SOCK_STREAM, 140 .pr_domain = &inetdomain, 141 .pr_protocol = IPPROTO_TCP, 142 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD| 143 PR_MPSAFE|PR_ASYNC_SEND|PR_ASYNC_RCVD, 144 145 .pr_input = tcp_input, 146 .pr_output = NULL, 147 .pr_ctlinput = tcp_ctlinput, 148 .pr_ctloutput = tcp_ctloutput, 149 150 .pr_ctlport = tcp_ctlport, 151 .pr_init = tcp_init, 152 .pr_fasttimo = NULL, 153 .pr_slowtimo = NULL, 154 .pr_drain = tcp_drain, 155 .pr_usrreqs = &tcp_usrreqs 156 }, 157 #ifdef SCTP 158 /* 159 * Order is very important here, we add the good one in 160 * in this postion so it maps to the right ip_protox[] 161 * postion for SCTP. Don't move the one above below 162 * this one or IPv6/4 compatability will break 163 */ 164 { 165 .pr_type = SOCK_DGRAM, 166 .pr_domain = &inetdomain, 167 .pr_protocol = IPPROTO_SCTP, 168 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 169 170 .pr_input = sctp_input, 171 .pr_output = NULL, 172 .pr_ctlinput = sctp_ctlinput, 173 .pr_ctloutput = sctp_ctloutput, 174 175 .pr_ctlport = cpu0_ctlport, 176 .pr_init = sctp_init, 177 .pr_drain = sctp_drain, 178 .pr_usrreqs = &sctp_usrreqs 179 }, 180 { 181 .pr_type = SOCK_SEQPACKET, 182 .pr_domain = &inetdomain, 183 .pr_protocol = IPPROTO_SCTP, 184 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 185 186 .pr_input = sctp_input, 187 .pr_output = NULL, 188 .pr_ctlinput = sctp_ctlinput, 189 .pr_ctloutput = sctp_ctloutput, 190 191 .pr_ctlport = cpu0_ctlport, 192 .pr_drain = sctp_drain, 193 .pr_usrreqs = &sctp_usrreqs 194 }, 195 196 { 197 .pr_type = SOCK_STREAM, 198 .pr_domain = &inetdomain, 199 .pr_protocol = IPPROTO_SCTP, 200 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD, 201 202 .pr_input = sctp_input, 203 .pr_output = NULL, 204 .pr_ctlinput = sctp_ctlinput, 205 .pr_ctloutput = sctp_ctloutput, 206 207 .pr_ctlport = cpu0_ctlport, 208 .pr_drain = sctp_drain, 209 .pr_usrreqs = &sctp_usrreqs 210 }, 211 #endif /* SCTP */ 212 { 213 .pr_type = SOCK_RAW, 214 .pr_domain = &inetdomain, 215 .pr_protocol = IPPROTO_RAW, 216 .pr_flags = PR_ATOMIC|PR_ADDR, 217 218 .pr_input = rip_input, 219 .pr_output = NULL, 220 .pr_ctlinput = rip_ctlinput, 221 .pr_ctloutput = rip_ctloutput, 222 223 .pr_ctlport = cpu0_ctlport, 224 .pr_usrreqs = &rip_usrreqs 225 }, 226 { 227 .pr_type = SOCK_RAW, 228 .pr_domain = &inetdomain, 229 .pr_protocol = IPPROTO_ICMP, 230 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 231 232 .pr_input = icmp_input, 233 .pr_output = NULL, 234 .pr_ctlinput = NULL, 235 .pr_ctloutput = rip_ctloutput, 236 237 .pr_usrreqs = &rip_usrreqs 238 }, 239 { 240 .pr_type = SOCK_RAW, 241 .pr_domain = &inetdomain, 242 .pr_protocol = IPPROTO_IGMP, 243 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 244 245 .pr_input = igmp_input, 246 .pr_output = NULL, 247 .pr_ctlinput = NULL, 248 .pr_ctloutput = rip_ctloutput, 249 250 .pr_init = igmp_init, 251 .pr_fasttimo = igmp_fasttimo, 252 .pr_slowtimo = igmp_slowtimo, 253 .pr_drain = NULL, 254 .pr_usrreqs = &rip_usrreqs 255 }, 256 { 257 .pr_type = SOCK_RAW, 258 .pr_domain = &inetdomain, 259 .pr_protocol = IPPROTO_RSVP, 260 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 261 262 .pr_input = rsvp_input, 263 .pr_output = NULL, 264 .pr_ctlinput = NULL, 265 .pr_ctloutput = rip_ctloutput, 266 267 .pr_usrreqs = &rip_usrreqs 268 }, 269 #ifdef IPSEC 270 { 271 .pr_type = SOCK_RAW, 272 .pr_domain = &inetdomain, 273 .pr_protocol = IPPROTO_AH, 274 .pr_flags = PR_ATOMIC|PR_ADDR, 275 276 .pr_input = ah4_input, 277 .pr_output = NULL, 278 .pr_ctlinput = NULL, 279 .pr_ctloutput = NULL, 280 281 .pr_ctlport = NULL, 282 .pr_usrreqs = &nousrreqs 283 }, 284 #ifdef IPSEC_ESP 285 { 286 .pr_type = SOCK_RAW, 287 .pr_domain = &inetdomain, 288 .pr_protocol = IPPROTO_ESP, 289 .pr_flags = PR_ATOMIC|PR_ADDR, 290 291 .pr_input = esp4_input, 292 .pr_output = NULL, 293 .pr_ctlinput = NULL, 294 .pr_ctloutput = NULL, 295 296 .pr_ctlport = NULL, 297 .pr_usrreqs = &nousrreqs 298 }, 299 #endif 300 { 301 .pr_type = SOCK_RAW, 302 .pr_domain = &inetdomain, 303 .pr_protocol = IPPROTO_IPCOMP, 304 .pr_flags = PR_ATOMIC|PR_ADDR, 305 306 .pr_input = ipcomp4_input, 307 .pr_output = 0, 308 .pr_ctlinput = NULL, 309 .pr_ctloutput = NULL, 310 311 .pr_ctlport = NULL, 312 .pr_usrreqs = &nousrreqs 313 }, 314 #endif /* IPSEC */ 315 #ifdef FAST_IPSEC 316 { 317 .pr_type = SOCK_RAW, 318 .pr_domain = &inetdomain, 319 .pr_protocol = IPPROTO_AH, 320 .pr_flags = PR_ATOMIC|PR_ADDR, 321 322 .pr_input = ipsec4_common_input, 323 .pr_output = NULL, 324 .pr_ctlinput = NULL, 325 .pr_ctloutput = NULL, 326 327 .pr_ctlport = NULL, 328 .pr_usrreqs = &nousrreqs 329 }, 330 { 331 .pr_type = SOCK_RAW, 332 .pr_domain = &inetdomain, 333 .pr_protocol = IPPROTO_ESP, 334 .pr_flags = PR_ATOMIC|PR_ADDR, 335 336 .pr_input = ipsec4_common_input, 337 .pr_output = NULL 338 .pr_ctlinput = NULL, 339 .pr_ctloutput = NULL, 340 341 .pr_ctlport = NULL, 342 .pr_usrreqs = &nousrreqs 343 }, 344 { 345 .pr_type = SOCK_RAW, 346 .pr_domain = &inetdomain, 347 .pr_protocol = IPPROTO_IPCOMP, 348 .pr_flags = PR_ATOMIC|PR_ADDR, 349 350 .pr_input = ipsec4_common_input, 351 .pr_output = NULL, 352 .pr_ctlinput = NULL, 353 .pr_ctloutput = NULL, 354 355 .pr_ctlport = NULL, 356 .pr_usrreqs = &nousrreqs 357 }, 358 #endif /* FAST_IPSEC */ 359 { 360 .pr_type = SOCK_RAW, 361 .pr_domain = &inetdomain, 362 .pr_protocol = IPPROTO_IPV4, 363 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 364 .pr_input = encap4_input, 365 .pr_output = NULL, 366 .pr_ctlinput = NULL, 367 .pr_ctloutput = rip_ctloutput, 368 369 .pr_ctlport = NULL, 370 .pr_init = encap_init, 371 .pr_usrreqs = &rip_usrreqs 372 }, 373 { 374 .pr_type = SOCK_RAW, 375 .pr_domain = &inetdomain, 376 .pr_protocol = IPPROTO_MOBILE, 377 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 378 379 .pr_input = encap4_input, 380 .pr_output = NULL, 381 .pr_ctlinput = NULL, 382 .pr_ctloutput = rip_ctloutput, 383 384 .pr_ctlport = NULL, 385 .pr_init = encap_init, 386 .pr_usrreqs = &rip_usrreqs 387 }, 388 { 389 .pr_type = SOCK_RAW, 390 .pr_domain = &inetdomain, 391 .pr_protocol = IPPROTO_GRE, 392 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 393 394 .pr_input = encap4_input, 395 .pr_output = NULL, 396 .pr_ctlinput = NULL, 397 .pr_ctloutput = rip_ctloutput, 398 399 .pr_ctlport = NULL, 400 .pr_init = encap_init, 401 .pr_usrreqs = &rip_usrreqs 402 }, 403 #ifdef INET6 404 { 405 .pr_type = SOCK_RAW, 406 .pr_domain = &inetdomain, 407 .pr_protocol = IPPROTO_IPV6, 408 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 409 410 .pr_input = encap4_input, 411 .pr_output = NULL, 412 .pr_ctlinput = NULL, 413 .pr_ctloutput = rip_ctloutput, 414 415 .pr_ctlport = NULL, 416 .pr_init = encap_init, 417 .pr_usrreqs = &rip_usrreqs 418 }, 419 #endif 420 #ifdef IPDIVERT 421 { 422 .pr_type = SOCK_RAW, 423 .pr_domain = &inetdomain, 424 .pr_protocol = IPPROTO_DIVERT, 425 .pr_flags = PR_ATOMIC|PR_ADDR, 426 427 .pr_input = div_input, 428 .pr_output = NULL, 429 .pr_ctlinput = NULL, 430 .pr_ctloutput = ip_ctloutput, 431 432 .pr_ctlport = NULL, 433 .pr_init = div_init, 434 .pr_usrreqs = &div_usrreqs 435 }, 436 #endif 437 #ifdef IPXIP 438 { 439 .pr_type = SOCK_RAW, 440 .pr_domain = &inetdomain, 441 .pr_protocol = IPPROTO_IDP, 442 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 443 444 .pr_input = ipxip_input, 445 .pr_output = NULL, 446 .pr_ctlinput = ipxip_ctlinput, 447 .pr_ctloutput = NULL, 448 449 .pr_ctlport = cpu0_ctlport, 450 .pr_usrreqs = &rip_usrreqs 451 }, 452 #endif 453 #ifdef PIM 454 { 455 .pr_type = SOCK_RAW, 456 .pr_domain = &inetdomain, 457 .pr_protocol = IPPROTO_PIM, 458 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 459 460 .pr_input = pim_input, 461 .pr_output = NULL, 462 .pr_ctlinput = NULL, 463 .pr_ctloutput = rip_ctloutput, 464 465 .pr_ctlport = NULL, 466 .pr_usrreqs = &rip_usrreqs 467 }, 468 #endif 469 #ifdef NPFSYNC 470 { 471 .pr_type = SOCK_RAW, 472 .pr_domain = &inetdomain, 473 .pr_protocol = IPPROTO_PFSYNC, 474 .pr_flags = PR_ATOMIC|PR_ADDR, 475 476 .pr_input = pfsync_input, 477 .pr_output = NULL, 478 .pr_ctlinput = NULL, 479 .pr_ctloutput = rip_ctloutput, 480 481 .pr_ctlport = NULL, 482 .pr_usrreqs = &rip_usrreqs 483 }, 484 #endif /* NPFSYNC */ 485 { 486 /* raw wildcard */ 487 .pr_type = SOCK_RAW, 488 .pr_domain = &inetdomain, 489 .pr_protocol = 0, 490 .pr_flags = PR_ATOMIC|PR_ADDR, 491 492 .pr_input = rip_input, 493 .pr_output = NULL, 494 .pr_ctlinput = NULL, 495 .pr_ctloutput = rip_ctloutput, 496 497 .pr_init = rip_init, 498 .pr_ctlport = NULL, 499 .pr_usrreqs = &rip_usrreqs 500 }, 501 #ifdef CARP 502 { 503 .pr_type = SOCK_RAW, 504 .pr_domain = &inetdomain, 505 .pr_protocol = IPPROTO_CARP, 506 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE, 507 508 .pr_input = carp_proto_input, 509 .pr_output = rip_output, 510 .pr_ctlinput = carp_proto_ctlinput, 511 .pr_ctloutput = rip_ctloutput, 512 513 .pr_ctlport = cpu0_ctlport, 514 .pr_usrreqs = &rip_usrreqs 515 }, 516 #endif 517 }; 518 519 struct domain inetdomain = { 520 AF_INET, "internet", NULL, NULL, NULL, 521 inetsw, &inetsw[NELEM(inetsw)], 522 SLIST_ENTRY_INITIALIZER, 523 in_inithead, 32, sizeof(struct sockaddr_in), 524 }; 525 526 DOMAIN_SET(inet); 527 528 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 529 "Internet Family"); 530 531 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 532 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 533 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 534 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 535 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 536 #ifdef FAST_IPSEC 537 /* XXX no protocol # to use, pick something "reserved" */ 538 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 539 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 540 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 541 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 542 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 543 #else 544 #ifdef IPSEC 545 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 546 #endif /* IPSEC */ 547 #endif /* !FAST_IPSEC */ 548 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 549 #ifdef IPDIVERT 550 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 551 #endif 552 #ifdef PIM 553 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 554 #endif 555 #ifdef CARP 556 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 557 #endif 558