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| 128 PR_ASYNC_SEND|PR_ASEND_HOLDTD, 129 130 .pr_input = udp_input, 131 .pr_output = NULL, 132 .pr_ctlinput = udp_ctlinput, 133 .pr_ctloutput = ip_ctloutput, 134 135 .pr_ctlport = udp_ctlport, 136 .pr_init = udp_init, 137 .pr_usrreqs = &udp_usrreqs 138 }, 139 { 140 .pr_type = SOCK_STREAM, 141 .pr_domain = &inetdomain, 142 .pr_protocol = IPPROTO_TCP, 143 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_MPSAFE| 144 PR_ASYNC_SEND|PR_ASYNC_RCVD|PR_ACONN_HOLDTD| 145 PR_RAND_INITPORT, 146 147 .pr_input = tcp_input, 148 .pr_output = NULL, 149 .pr_ctlinput = tcp_ctlinput, 150 .pr_ctloutput = tcp_ctloutput, 151 152 .pr_ctlport = tcp_ctlport, 153 .pr_init = tcp_init, 154 .pr_fasttimo = NULL, 155 .pr_slowtimo = NULL, 156 .pr_drain = tcp_drain, 157 .pr_usrreqs = &tcp_usrreqs 158 }, 159 #ifdef SCTP 160 /* 161 * Order is very important here, we add the good one in 162 * in this postion so it maps to the right ip_protox[] 163 * postion for SCTP. Don't move the one above below 164 * this one or IPv6/4 compatability will break 165 */ 166 { 167 .pr_type = SOCK_DGRAM, 168 .pr_domain = &inetdomain, 169 .pr_protocol = IPPROTO_SCTP, 170 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 171 172 .pr_input = sctp_input, 173 .pr_output = NULL, 174 .pr_ctlinput = sctp_ctlinput, 175 .pr_ctloutput = sctp_ctloutput, 176 177 .pr_ctlport = cpu0_ctlport, 178 .pr_init = sctp_init, 179 .pr_drain = sctp_drain, 180 .pr_usrreqs = &sctp_usrreqs 181 }, 182 { 183 .pr_type = SOCK_SEQPACKET, 184 .pr_domain = &inetdomain, 185 .pr_protocol = IPPROTO_SCTP, 186 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 187 188 .pr_input = sctp_input, 189 .pr_output = NULL, 190 .pr_ctlinput = sctp_ctlinput, 191 .pr_ctloutput = sctp_ctloutput, 192 193 .pr_ctlport = cpu0_ctlport, 194 .pr_drain = sctp_drain, 195 .pr_usrreqs = &sctp_usrreqs 196 }, 197 198 { 199 .pr_type = SOCK_STREAM, 200 .pr_domain = &inetdomain, 201 .pr_protocol = IPPROTO_SCTP, 202 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD, 203 204 .pr_input = sctp_input, 205 .pr_output = NULL, 206 .pr_ctlinput = sctp_ctlinput, 207 .pr_ctloutput = sctp_ctloutput, 208 209 .pr_ctlport = cpu0_ctlport, 210 .pr_drain = sctp_drain, 211 .pr_usrreqs = &sctp_usrreqs 212 }, 213 #endif /* SCTP */ 214 { 215 .pr_type = SOCK_RAW, 216 .pr_domain = &inetdomain, 217 .pr_protocol = IPPROTO_RAW, 218 .pr_flags = PR_ATOMIC|PR_ADDR, 219 220 .pr_input = rip_input, 221 .pr_output = NULL, 222 .pr_ctlinput = rip_ctlinput, 223 .pr_ctloutput = rip_ctloutput, 224 225 .pr_ctlport = cpu0_ctlport, 226 .pr_usrreqs = &rip_usrreqs 227 }, 228 { 229 .pr_type = SOCK_RAW, 230 .pr_domain = &inetdomain, 231 .pr_protocol = IPPROTO_ICMP, 232 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE, 233 234 .pr_input = icmp_input, 235 .pr_output = NULL, 236 .pr_ctlinput = NULL, 237 .pr_ctloutput = rip_ctloutput, 238 239 .pr_usrreqs = &rip_usrreqs 240 }, 241 { 242 .pr_type = SOCK_RAW, 243 .pr_domain = &inetdomain, 244 .pr_protocol = IPPROTO_IGMP, 245 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 246 247 .pr_input = igmp_input, 248 .pr_output = NULL, 249 .pr_ctlinput = NULL, 250 .pr_ctloutput = rip_ctloutput, 251 252 .pr_init = igmp_init, 253 .pr_fasttimo = igmp_fasttimo, 254 .pr_slowtimo = igmp_slowtimo, 255 .pr_drain = NULL, 256 .pr_usrreqs = &rip_usrreqs 257 }, 258 { 259 .pr_type = SOCK_RAW, 260 .pr_domain = &inetdomain, 261 .pr_protocol = IPPROTO_RSVP, 262 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 263 264 .pr_input = rsvp_input, 265 .pr_output = NULL, 266 .pr_ctlinput = NULL, 267 .pr_ctloutput = rip_ctloutput, 268 269 .pr_usrreqs = &rip_usrreqs 270 }, 271 #ifdef IPSEC 272 { 273 .pr_type = SOCK_RAW, 274 .pr_domain = &inetdomain, 275 .pr_protocol = IPPROTO_AH, 276 .pr_flags = PR_ATOMIC|PR_ADDR, 277 278 .pr_input = ah4_input, 279 .pr_output = NULL, 280 .pr_ctlinput = NULL, 281 .pr_ctloutput = NULL, 282 283 .pr_ctlport = NULL, 284 .pr_usrreqs = &nousrreqs 285 }, 286 #ifdef IPSEC_ESP 287 { 288 .pr_type = SOCK_RAW, 289 .pr_domain = &inetdomain, 290 .pr_protocol = IPPROTO_ESP, 291 .pr_flags = PR_ATOMIC|PR_ADDR, 292 293 .pr_input = esp4_input, 294 .pr_output = NULL, 295 .pr_ctlinput = NULL, 296 .pr_ctloutput = NULL, 297 298 .pr_ctlport = NULL, 299 .pr_usrreqs = &nousrreqs 300 }, 301 #endif 302 { 303 .pr_type = SOCK_RAW, 304 .pr_domain = &inetdomain, 305 .pr_protocol = IPPROTO_IPCOMP, 306 .pr_flags = PR_ATOMIC|PR_ADDR, 307 308 .pr_input = ipcomp4_input, 309 .pr_output = 0, 310 .pr_ctlinput = NULL, 311 .pr_ctloutput = NULL, 312 313 .pr_ctlport = NULL, 314 .pr_usrreqs = &nousrreqs 315 }, 316 #endif /* IPSEC */ 317 #ifdef FAST_IPSEC 318 { 319 .pr_type = SOCK_RAW, 320 .pr_domain = &inetdomain, 321 .pr_protocol = IPPROTO_AH, 322 .pr_flags = PR_ATOMIC|PR_ADDR, 323 324 .pr_input = ipsec4_common_input, 325 .pr_output = NULL, 326 .pr_ctlinput = NULL, 327 .pr_ctloutput = NULL, 328 329 .pr_ctlport = NULL, 330 .pr_usrreqs = &nousrreqs 331 }, 332 { 333 .pr_type = SOCK_RAW, 334 .pr_domain = &inetdomain, 335 .pr_protocol = IPPROTO_ESP, 336 .pr_flags = PR_ATOMIC|PR_ADDR, 337 338 .pr_input = ipsec4_common_input, 339 .pr_output = NULL, 340 .pr_ctlinput = NULL, 341 .pr_ctloutput = NULL, 342 343 .pr_ctlport = NULL, 344 .pr_usrreqs = &nousrreqs 345 }, 346 { 347 .pr_type = SOCK_RAW, 348 .pr_domain = &inetdomain, 349 .pr_protocol = IPPROTO_IPCOMP, 350 .pr_flags = PR_ATOMIC|PR_ADDR, 351 352 .pr_input = ipsec4_common_input, 353 .pr_output = NULL, 354 .pr_ctlinput = NULL, 355 .pr_ctloutput = NULL, 356 357 .pr_ctlport = NULL, 358 .pr_usrreqs = &nousrreqs 359 }, 360 #endif /* FAST_IPSEC */ 361 { 362 .pr_type = SOCK_RAW, 363 .pr_domain = &inetdomain, 364 .pr_protocol = IPPROTO_IPV4, 365 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 366 .pr_input = encap4_input, 367 .pr_output = NULL, 368 .pr_ctlinput = NULL, 369 .pr_ctloutput = rip_ctloutput, 370 371 .pr_ctlport = NULL, 372 .pr_init = encap_init, 373 .pr_usrreqs = &rip_usrreqs 374 }, 375 { 376 .pr_type = SOCK_RAW, 377 .pr_domain = &inetdomain, 378 .pr_protocol = IPPROTO_MOBILE, 379 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 380 381 .pr_input = encap4_input, 382 .pr_output = NULL, 383 .pr_ctlinput = NULL, 384 .pr_ctloutput = rip_ctloutput, 385 386 .pr_ctlport = NULL, 387 .pr_init = encap_init, 388 .pr_usrreqs = &rip_usrreqs 389 }, 390 { 391 .pr_type = SOCK_RAW, 392 .pr_domain = &inetdomain, 393 .pr_protocol = IPPROTO_GRE, 394 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 395 396 .pr_input = encap4_input, 397 .pr_output = NULL, 398 .pr_ctlinput = NULL, 399 .pr_ctloutput = rip_ctloutput, 400 401 .pr_ctlport = NULL, 402 .pr_init = encap_init, 403 .pr_usrreqs = &rip_usrreqs 404 }, 405 #ifdef INET6 406 { 407 .pr_type = SOCK_RAW, 408 .pr_domain = &inetdomain, 409 .pr_protocol = IPPROTO_IPV6, 410 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 411 412 .pr_input = encap4_input, 413 .pr_output = NULL, 414 .pr_ctlinput = NULL, 415 .pr_ctloutput = rip_ctloutput, 416 417 .pr_ctlport = NULL, 418 .pr_init = encap_init, 419 .pr_usrreqs = &rip_usrreqs 420 }, 421 #endif 422 #ifdef IPDIVERT 423 { 424 .pr_type = SOCK_RAW, 425 .pr_domain = &inetdomain, 426 .pr_protocol = IPPROTO_DIVERT, 427 .pr_flags = PR_ATOMIC|PR_ADDR, 428 429 .pr_input = div_input, 430 .pr_output = NULL, 431 .pr_ctlinput = NULL, 432 .pr_ctloutput = ip_ctloutput, 433 434 .pr_ctlport = NULL, 435 .pr_init = div_init, 436 .pr_usrreqs = &div_usrreqs 437 }, 438 #endif 439 #ifdef IPXIP 440 { 441 .pr_type = SOCK_RAW, 442 .pr_domain = &inetdomain, 443 .pr_protocol = IPPROTO_IDP, 444 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 445 446 .pr_input = ipxip_input, 447 .pr_output = NULL, 448 .pr_ctlinput = ipxip_ctlinput, 449 .pr_ctloutput = NULL, 450 451 .pr_ctlport = cpu0_ctlport, 452 .pr_usrreqs = &rip_usrreqs 453 }, 454 #endif 455 #ifdef PIM 456 { 457 .pr_type = SOCK_RAW, 458 .pr_domain = &inetdomain, 459 .pr_protocol = IPPROTO_PIM, 460 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 461 462 .pr_input = pim_input, 463 .pr_output = NULL, 464 .pr_ctlinput = NULL, 465 .pr_ctloutput = rip_ctloutput, 466 467 .pr_ctlport = NULL, 468 .pr_usrreqs = &rip_usrreqs 469 }, 470 #endif 471 #ifdef NPFSYNC 472 { 473 .pr_type = SOCK_RAW, 474 .pr_domain = &inetdomain, 475 .pr_protocol = IPPROTO_PFSYNC, 476 .pr_flags = PR_ATOMIC|PR_ADDR, 477 478 .pr_input = pfsync_input, 479 .pr_output = NULL, 480 .pr_ctlinput = NULL, 481 .pr_ctloutput = rip_ctloutput, 482 483 .pr_ctlport = NULL, 484 .pr_usrreqs = &rip_usrreqs 485 }, 486 #endif /* NPFSYNC */ 487 { 488 /* raw wildcard */ 489 .pr_type = SOCK_RAW, 490 .pr_domain = &inetdomain, 491 .pr_protocol = 0, 492 .pr_flags = PR_ATOMIC|PR_ADDR, 493 494 .pr_input = rip_input, 495 .pr_output = NULL, 496 .pr_ctlinput = NULL, 497 .pr_ctloutput = rip_ctloutput, 498 499 .pr_init = rip_init, 500 .pr_ctlport = NULL, 501 .pr_usrreqs = &rip_usrreqs 502 }, 503 #ifdef CARP 504 { 505 .pr_type = SOCK_RAW, 506 .pr_domain = &inetdomain, 507 .pr_protocol = IPPROTO_CARP, 508 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE, 509 510 .pr_input = carp_proto_input, 511 .pr_output = rip_output, 512 .pr_ctlinput = carp_proto_ctlinput, 513 .pr_ctloutput = rip_ctloutput, 514 515 .pr_ctlport = cpu0_ctlport, 516 .pr_usrreqs = &rip_usrreqs 517 }, 518 #endif 519 }; 520 521 struct domain inetdomain = { 522 AF_INET, "internet", NULL, NULL, NULL, 523 inetsw, &inetsw[NELEM(inetsw)], 524 SLIST_ENTRY_INITIALIZER, 525 in_inithead, 32, sizeof(struct sockaddr_in), 526 }; 527 528 DOMAIN_SET(inet); 529 530 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 531 "Internet Family"); 532 533 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 534 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 535 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 536 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 537 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 538 #ifdef FAST_IPSEC 539 /* XXX no protocol # to use, pick something "reserved" */ 540 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 541 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 542 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 543 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 544 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 545 #else 546 #ifdef IPSEC 547 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 548 #endif /* IPSEC */ 549 #endif /* !FAST_IPSEC */ 550 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 551 #ifdef IPDIVERT 552 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 553 #endif 554 #ifdef PIM 555 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 556 #endif 557 #ifdef CARP 558 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 559 #endif 560