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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 34 * $FreeBSD: src/sys/netinet/in_proto.c,v 1.53.2.7 2003/08/24 08:24:38 hsu Exp $ 35 */ 36 37 #include "opt_ipdivert.h" 38 #include "opt_ipx.h" 39 #include "opt_mrouting.h" 40 #include "opt_ipsec.h" 41 #include "opt_inet6.h" 42 #include "opt_sctp.h" 43 #include "opt_carp.h" 44 45 #include <sys/param.h> 46 #include <sys/kernel.h> 47 #include <sys/socket.h> 48 #include <sys/domain.h> 49 #include <sys/protosw.h> 50 #include <sys/queue.h> 51 #include <sys/sysctl.h> 52 53 #include <net/if.h> 54 #include <net/route.h> 55 56 #include <netinet/in.h> 57 #include <netinet/in_systm.h> 58 #include <netinet/ip.h> 59 #include <netinet/ip_var.h> 60 #include <netinet/ip_icmp.h> 61 #include <netinet/igmp_var.h> 62 #ifdef PIM 63 #include <netinet/pim_var.h> 64 #endif 65 #include <netinet/tcp.h> 66 #include <netinet/tcp_timer.h> 67 #include <netinet/tcp_var.h> 68 #include <netinet/udp.h> 69 #include <netinet/udp_var.h> 70 #include <netinet/ip_encap.h> 71 #ifdef IPDIVERT 72 #include <netinet/ip_divert.h> 73 #endif 74 75 /* 76 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 77 */ 78 79 #ifdef IPSEC 80 #include <netinet6/ipsec.h> 81 #include <netinet6/ah.h> 82 #ifdef IPSEC_ESP 83 #include <netinet6/esp.h> 84 #endif 85 #include <netinet6/ipcomp.h> 86 #endif /* IPSEC */ 87 88 #ifdef FAST_IPSEC 89 #include <netproto/ipsec/ipsec.h> 90 #endif /* FAST_IPSEC */ 91 92 #ifdef IPXIP 93 #include <netproto/ipx/ipx_ip.h> 94 #endif 95 96 #ifdef SCTP 97 #include <netinet/in_pcb.h> 98 #include <netinet/sctp_pcb.h> 99 #include <netinet/sctp.h> 100 #include <netinet/sctp_var.h> 101 #endif /* SCTP */ 102 103 #include <net/netisr.h> /* for cpu0_soport */ 104 105 #ifdef CARP 106 #include <netinet/ip_carp.h> 107 #endif 108 109 extern struct domain inetdomain; 110 static struct pr_usrreqs nousrreqs; 111 112 struct protosw inetsw[] = { 113 { 114 .pr_type = 0, 115 .pr_domain = &inetdomain, 116 .pr_protocol = 0, 117 .pr_flags = 0, 118 119 .pr_ctlport = NULL, 120 121 .pr_init = ip_init, 122 .pr_fasttimo = NULL, 123 .pr_slowtimo = ip_slowtimo, 124 .pr_drain = ip_drain, 125 .pr_usrreqs = &nousrreqs 126 }, 127 { 128 .pr_type = SOCK_DGRAM, 129 .pr_domain = &inetdomain, 130 .pr_protocol = IPPROTO_UDP, 131 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE|PR_ASYNC_SEND, 132 133 .pr_input = udp_input, 134 .pr_output = NULL, 135 .pr_ctlinput = udp_ctlinput, 136 .pr_ctloutput = ip_ctloutput, 137 138 .pr_ctlport = udp_ctlport, 139 .pr_init = udp_init, 140 .pr_usrreqs = &udp_usrreqs 141 }, 142 { 143 .pr_type = SOCK_STREAM, 144 .pr_domain = &inetdomain, 145 .pr_protocol = IPPROTO_TCP, 146 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD| 147 PR_MPSAFE|PR_ASYNC_SEND|PR_ASYNC_RCVD, 148 149 .pr_input = tcp_input, 150 .pr_output = NULL, 151 .pr_ctlinput = tcp_ctlinput, 152 .pr_ctloutput = tcp_ctloutput, 153 154 .pr_ctlport = tcp_ctlport, 155 .pr_init = tcp_init, 156 .pr_fasttimo = NULL, 157 .pr_slowtimo = NULL, 158 .pr_drain = tcp_drain, 159 .pr_usrreqs = &tcp_usrreqs 160 }, 161 #ifdef SCTP 162 /* 163 * Order is very important here, we add the good one in 164 * in this postion so it maps to the right ip_protox[] 165 * postion for SCTP. Don't move the one above below 166 * this one or IPv6/4 compatability will break 167 */ 168 { 169 .pr_type = SOCK_DGRAM, 170 .pr_domain = &inetdomain, 171 .pr_protocol = IPPROTO_SCTP, 172 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 173 174 .pr_input = sctp_input, 175 .pr_output = NULL, 176 .pr_ctlinput = sctp_ctlinput, 177 .pr_ctloutput = sctp_ctloutput, 178 179 .pr_ctlport = cpu0_ctlport, 180 .pr_init = sctp_init, 181 .pr_drain = sctp_drain, 182 .pr_usrreqs = &sctp_usrreqs 183 }, 184 { 185 .pr_type = SOCK_SEQPACKET, 186 .pr_domain = &inetdomain, 187 .pr_protocol = IPPROTO_SCTP, 188 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 189 190 .pr_input = sctp_input, 191 .pr_output = NULL, 192 .pr_ctlinput = sctp_ctlinput, 193 .pr_ctloutput = sctp_ctloutput, 194 195 .pr_ctlport = cpu0_ctlport, 196 .pr_drain = sctp_drain, 197 .pr_usrreqs = &sctp_usrreqs 198 }, 199 200 { 201 .pr_type = SOCK_STREAM, 202 .pr_domain = &inetdomain, 203 .pr_protocol = IPPROTO_SCTP, 204 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD, 205 206 .pr_input = sctp_input, 207 .pr_output = NULL, 208 .pr_ctlinput = sctp_ctlinput, 209 .pr_ctloutput = sctp_ctloutput, 210 211 .pr_ctlport = cpu0_ctlport, 212 .pr_drain = sctp_drain, 213 .pr_usrreqs = &sctp_usrreqs 214 }, 215 #endif /* SCTP */ 216 { 217 .pr_type = SOCK_RAW, 218 .pr_domain = &inetdomain, 219 .pr_protocol = IPPROTO_RAW, 220 .pr_flags = PR_ATOMIC|PR_ADDR, 221 222 .pr_input = rip_input, 223 .pr_output = NULL, 224 .pr_ctlinput = rip_ctlinput, 225 .pr_ctloutput = rip_ctloutput, 226 227 .pr_ctlport = cpu0_ctlport, 228 .pr_usrreqs = &rip_usrreqs 229 }, 230 { 231 .pr_type = SOCK_RAW, 232 .pr_domain = &inetdomain, 233 .pr_protocol = IPPROTO_ICMP, 234 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 235 236 .pr_input = icmp_input, 237 .pr_output = NULL, 238 .pr_ctlinput = NULL, 239 .pr_ctloutput = rip_ctloutput, 240 241 .pr_usrreqs = &rip_usrreqs 242 }, 243 { 244 .pr_type = SOCK_RAW, 245 .pr_domain = &inetdomain, 246 .pr_protocol = IPPROTO_IGMP, 247 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 248 249 .pr_input = igmp_input, 250 .pr_output = NULL, 251 .pr_ctlinput = NULL, 252 .pr_ctloutput = rip_ctloutput, 253 254 .pr_init = igmp_init, 255 .pr_fasttimo = igmp_fasttimo, 256 .pr_slowtimo = igmp_slowtimo, 257 .pr_drain = NULL, 258 .pr_usrreqs = &rip_usrreqs 259 }, 260 { 261 .pr_type = SOCK_RAW, 262 .pr_domain = &inetdomain, 263 .pr_protocol = IPPROTO_RSVP, 264 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 265 266 .pr_input = rsvp_input, 267 .pr_output = NULL, 268 .pr_ctlinput = NULL, 269 .pr_ctloutput = rip_ctloutput, 270 271 .pr_usrreqs = &rip_usrreqs 272 }, 273 #ifdef IPSEC 274 { 275 .pr_type = SOCK_RAW, 276 .pr_domain = &inetdomain, 277 .pr_protocol = IPPROTO_AH, 278 .pr_flags = PR_ATOMIC|PR_ADDR, 279 280 .pr_input = ah4_input, 281 .pr_output = NULL, 282 .pr_ctlinput = NULL, 283 .pr_ctloutput = NULL, 284 285 .pr_ctlport = NULL, 286 .pr_usrreqs = &nousrreqs 287 }, 288 #ifdef IPSEC_ESP 289 { 290 .pr_type = SOCK_RAW, 291 .pr_domain = &inetdomain, 292 .pr_protocol = IPPROTO_ESP, 293 .pr_flags = PR_ATOMIC|PR_ADDR, 294 295 .pr_input = esp4_input, 296 .pr_output = NULL, 297 .pr_ctlinput = NULL, 298 .pr_ctloutput = NULL, 299 300 .pr_ctlport = NULL, 301 .pr_usrreqs = &nousrreqs 302 }, 303 #endif 304 { 305 .pr_type = SOCK_RAW, 306 .pr_domain = &inetdomain, 307 .pr_protocol = IPPROTO_IPCOMP, 308 .pr_flags = PR_ATOMIC|PR_ADDR, 309 310 .pr_input = ipcomp4_input, 311 .pr_output = 0, 312 .pr_ctlinput = NULL, 313 .pr_ctloutput = NULL, 314 315 .pr_ctlport = NULL, 316 .pr_usrreqs = &nousrreqs 317 }, 318 #endif /* IPSEC */ 319 #ifdef FAST_IPSEC 320 { 321 .pr_type = SOCK_RAW, 322 .pr_domain = &inetdomain, 323 .pr_protocol = IPPROTO_AH, 324 .pr_flags = PR_ATOMIC|PR_ADDR, 325 326 .pr_input = ipsec4_common_input, 327 .pr_output = NULL, 328 .pr_ctlinput = NULL, 329 .pr_ctloutput = NULL, 330 331 .pr_ctlport = NULL, 332 .pr_usrreqs = &nousrreqs 333 }, 334 { 335 .pr_type = SOCK_RAW, 336 .pr_domain = &inetdomain, 337 .pr_protocol = IPPROTO_ESP, 338 .pr_flags = PR_ATOMIC|PR_ADDR, 339 340 .pr_input = ipsec4_common_input, 341 .pr_output = NULL 342 .pr_ctlinput = NULL, 343 .pr_ctloutput = NULL, 344 345 .pr_ctlport = NULL, 346 .pr_usrreqs = &nousrreqs 347 }, 348 { 349 .pr_type = SOCK_RAW, 350 .pr_domain = &inetdomain, 351 .pr_protocol = IPPROTO_IPCOMP, 352 .pr_flags = PR_ATOMIC|PR_ADDR, 353 354 .pr_input = ipsec4_common_input, 355 .pr_output = NULL, 356 .pr_ctlinput = NULL, 357 .pr_ctloutput = NULL, 358 359 .pr_ctlport = NULL, 360 .pr_usrreqs = &nousrreqs 361 }, 362 #endif /* FAST_IPSEC */ 363 { 364 .pr_type = SOCK_RAW, 365 .pr_domain = &inetdomain, 366 .pr_protocol = IPPROTO_IPV4, 367 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 368 .pr_input = encap4_input, 369 .pr_output = NULL, 370 .pr_ctlinput = NULL, 371 .pr_ctloutput = rip_ctloutput, 372 373 .pr_ctlport = NULL, 374 .pr_init = encap_init, 375 .pr_usrreqs = &rip_usrreqs 376 }, 377 { 378 .pr_type = SOCK_RAW, 379 .pr_domain = &inetdomain, 380 .pr_protocol = IPPROTO_MOBILE, 381 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 382 383 .pr_input = encap4_input, 384 .pr_output = NULL, 385 .pr_ctlinput = NULL, 386 .pr_ctloutput = rip_ctloutput, 387 388 .pr_ctlport = NULL, 389 .pr_init = encap_init, 390 .pr_usrreqs = &rip_usrreqs 391 }, 392 { 393 .pr_type = SOCK_RAW, 394 .pr_domain = &inetdomain, 395 .pr_protocol = IPPROTO_GRE, 396 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 397 398 .pr_input = encap4_input, 399 .pr_output = NULL, 400 .pr_ctlinput = NULL, 401 .pr_ctloutput = rip_ctloutput, 402 403 .pr_ctlport = NULL, 404 .pr_init = encap_init, 405 .pr_usrreqs = &rip_usrreqs 406 }, 407 #ifdef INET6 408 { 409 .pr_type = SOCK_RAW, 410 .pr_domain = &inetdomain, 411 .pr_protocol = IPPROTO_IPV6, 412 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 413 414 .pr_input = encap4_input, 415 .pr_output = NULL, 416 .pr_ctlinput = NULL, 417 .pr_ctloutput = rip_ctloutput, 418 419 .pr_ctlport = NULL, 420 .pr_init = encap_init, 421 .pr_usrreqs = &rip_usrreqs 422 }, 423 #endif 424 #ifdef IPDIVERT 425 { 426 .pr_type = SOCK_RAW, 427 .pr_domain = &inetdomain, 428 .pr_protocol = IPPROTO_DIVERT, 429 .pr_flags = PR_ATOMIC|PR_ADDR, 430 431 .pr_input = div_input, 432 .pr_output = NULL, 433 .pr_ctlinput = NULL, 434 .pr_ctloutput = ip_ctloutput, 435 436 .pr_ctlport = NULL, 437 .pr_init = div_init, 438 .pr_usrreqs = &div_usrreqs 439 }, 440 #endif 441 #ifdef IPXIP 442 { 443 .pr_type = SOCK_RAW, 444 .pr_domain = &inetdomain, 445 .pr_protocol = IPPROTO_IDP, 446 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 447 448 .pr_input = ipxip_input, 449 .pr_output = NULL, 450 .pr_ctlinput = ipxip_ctlinput, 451 .pr_ctloutput = NULL, 452 453 .pr_ctlport = cpu0_ctlport, 454 .pr_usrreqs = &rip_usrreqs 455 }, 456 #endif 457 #ifdef PIM 458 { 459 .pr_type = SOCK_RAW, 460 .pr_domain = &inetdomain, 461 .pr_protocol = IPPROTO_PIM, 462 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 463 464 .pr_input = pim_input, 465 .pr_output = NULL, 466 .pr_ctlinput = NULL, 467 .pr_ctloutput = rip_ctloutput, 468 469 .pr_ctlport = NULL, 470 .pr_usrreqs = &rip_usrreqs 471 }, 472 #endif 473 #ifdef NPFSYNC 474 { 475 .pr_type = SOCK_RAW, 476 .pr_domain = &inetdomain, 477 .pr_protocol = IPPROTO_PFSYNC, 478 .pr_flags = PR_ATOMIC|PR_ADDR, 479 480 .pr_input = pfsync_input, 481 .pr_output = NULL, 482 .pr_ctlinput = NULL, 483 .pr_ctloutput = rip_ctloutput, 484 485 .pr_ctlport = NULL, 486 .pr_usrreqs = &rip_usrreqs 487 }, 488 #endif /* NPFSYNC */ 489 { 490 /* raw wildcard */ 491 .pr_type = SOCK_RAW, 492 .pr_domain = &inetdomain, 493 .pr_protocol = 0, 494 .pr_flags = PR_ATOMIC|PR_ADDR, 495 496 .pr_input = rip_input, 497 .pr_output = NULL, 498 .pr_ctlinput = NULL, 499 .pr_ctloutput = rip_ctloutput, 500 501 .pr_init = rip_init, 502 .pr_ctlport = NULL, 503 .pr_usrreqs = &rip_usrreqs 504 }, 505 #ifdef CARP 506 { 507 .pr_type = SOCK_RAW, 508 .pr_domain = &inetdomain, 509 .pr_protocol = IPPROTO_CARP, 510 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE, 511 512 .pr_input = carp_proto_input, 513 .pr_output = rip_output, 514 .pr_ctlinput = carp_proto_ctlinput, 515 .pr_ctloutput = rip_ctloutput, 516 517 .pr_ctlport = cpu0_ctlport, 518 .pr_usrreqs = &rip_usrreqs 519 }, 520 #endif 521 }; 522 523 struct domain inetdomain = { 524 AF_INET, "internet", NULL, NULL, NULL, 525 inetsw, &inetsw[NELEM(inetsw)], 526 SLIST_ENTRY_INITIALIZER, 527 in_inithead, 32, sizeof(struct sockaddr_in), 528 }; 529 530 DOMAIN_SET(inet); 531 532 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 533 "Internet Family"); 534 535 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 536 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 537 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 538 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 539 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 540 #ifdef FAST_IPSEC 541 /* XXX no protocol # to use, pick something "reserved" */ 542 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 543 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 544 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 545 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 546 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 547 #else 548 #ifdef IPSEC 549 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 550 #endif /* IPSEC */ 551 #endif /* !FAST_IPSEC */ 552 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 553 #ifdef IPDIVERT 554 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 555 #endif 556 #ifdef PIM 557 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 558 #endif 559 #ifdef CARP 560 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 561 #endif 562