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 * $DragonFly: src/sys/netinet/in_proto.c,v 1.17 2008/10/27 02:56:30 sephe Exp $ 36 */ 37 38 #include "opt_ipdivert.h" 39 #include "opt_ipx.h" 40 #include "opt_mrouting.h" 41 #include "opt_ipsec.h" 42 #include "opt_inet6.h" 43 #include "opt_sctp.h" 44 #include "opt_carp.h" 45 46 #include <sys/param.h> 47 #include <sys/kernel.h> 48 #include <sys/socket.h> 49 #include <sys/domain.h> 50 #include <sys/protosw.h> 51 #include <sys/queue.h> 52 #include <sys/sysctl.h> 53 54 #include <net/if.h> 55 #include <net/route.h> 56 57 #include <netinet/in.h> 58 #include <netinet/in_systm.h> 59 #include <netinet/ip.h> 60 #include <netinet/ip_var.h> 61 #include <netinet/ip_icmp.h> 62 #include <netinet/igmp_var.h> 63 #ifdef PIM 64 #include <netinet/pim_var.h> 65 #endif 66 #include <netinet/tcp.h> 67 #include <netinet/tcp_timer.h> 68 #include <netinet/tcp_var.h> 69 #include <netinet/udp.h> 70 #include <netinet/udp_var.h> 71 #include <netinet/ip_encap.h> 72 #ifdef IPDIVERT 73 #include <netinet/ip_divert.h> 74 #endif 75 76 /* 77 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 78 */ 79 80 #ifdef IPSEC 81 #include <netinet6/ipsec.h> 82 #include <netinet6/ah.h> 83 #ifdef IPSEC_ESP 84 #include <netinet6/esp.h> 85 #endif 86 #include <netinet6/ipcomp.h> 87 #endif /* IPSEC */ 88 89 #ifdef FAST_IPSEC 90 #include <netproto/ipsec/ipsec.h> 91 #endif /* FAST_IPSEC */ 92 93 #ifdef IPXIP 94 #include <netproto/ipx/ipx_ip.h> 95 #endif 96 97 #ifdef NSIP 98 #include <netns/ns.h> 99 #include <netns/ns_if.h> 100 #endif 101 102 #ifdef SCTP 103 #include <netinet/in_pcb.h> 104 #include <netinet/sctp_pcb.h> 105 #include <netinet/sctp.h> 106 #include <netinet/sctp_var.h> 107 #endif /* SCTP */ 108 109 #include <net/netisr.h> /* for cpu0_soport */ 110 111 #ifdef CARP 112 #include <netinet/ip_carp.h> 113 #endif 114 115 extern struct domain inetdomain; 116 static struct pr_usrreqs nousrreqs; 117 118 struct protosw inetsw[] = { 119 { 120 .pr_type = 0, 121 .pr_domain = &inetdomain, 122 .pr_protocol = 0, 123 .pr_flags = 0, 124 125 .pr_ctlport = NULL, 126 127 .pr_init = ip_init, 128 .pr_fasttimo = NULL, 129 .pr_slowtimo = ip_slowtimo, 130 .pr_drain = ip_drain, 131 .pr_usrreqs = &nousrreqs 132 }, 133 { 134 .pr_type = SOCK_DGRAM, 135 .pr_domain = &inetdomain, 136 .pr_protocol = IPPROTO_UDP, 137 .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE, 138 139 .pr_input = udp_input, 140 .pr_output = NULL, 141 .pr_ctlinput = udp_ctlinput, 142 .pr_ctloutput = ip_ctloutput, 143 144 .pr_ctlport = udp_ctlport, 145 .pr_init = udp_init, 146 .pr_usrreqs = &udp_usrreqs 147 }, 148 { 149 .pr_type = SOCK_STREAM, 150 .pr_domain = &inetdomain, 151 .pr_protocol = IPPROTO_TCP, 152 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_MPSAFE, 153 154 .pr_input = tcp_input, 155 .pr_output = NULL, 156 .pr_ctlinput = tcp_ctlinput, 157 .pr_ctloutput = tcp_ctloutput, 158 159 .pr_ctlport = tcp_ctlport, 160 .pr_init = tcp_init, 161 .pr_fasttimo = NULL, 162 .pr_slowtimo = tcp_slowtimo, 163 .pr_drain = tcp_drain, 164 .pr_usrreqs = &tcp_usrreqs 165 }, 166 #ifdef SCTP 167 /* 168 * Order is very important here, we add the good one in 169 * in this postion so it maps to the right ip_protox[] 170 * postion for SCTP. Don't move the one above below 171 * this one or IPv6/4 compatability will break 172 */ 173 { 174 .pr_type = SOCK_DGRAM, 175 .pr_domain = &inetdomain, 176 .pr_protocol = IPPROTO_SCTP, 177 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 178 179 .pr_input = sctp_input, 180 .pr_output = NULL, 181 .pr_ctlinput = sctp_ctlinput, 182 .pr_ctloutput = sctp_ctloutput, 183 184 .pr_ctlport = cpu0_ctlport, 185 .pr_init = sctp_init, 186 .pr_drain = sctp_drain, 187 .pr_usrreqs = &sctp_usrreqs 188 }, 189 { 190 .pr_type = SOCK_SEQPACKET, 191 .pr_domain = &inetdomain, 192 .pr_protocol = IPPROTO_SCTP, 193 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 194 195 .pr_input = sctp_input, 196 .pr_output = NULL, 197 .pr_ctlinput = sctp_ctlinput, 198 .pr_ctloutput = sctp_ctloutput, 199 200 .pr_ctlport = cpu0_ctlport, 201 .pr_drain = sctp_drain, 202 .pr_usrreqs = &sctp_usrreqs 203 }, 204 205 { 206 .pr_type = SOCK_STREAM, 207 .pr_domain = &inetdomain, 208 .pr_protocol = IPPROTO_SCTP, 209 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD, 210 211 .pr_input = sctp_input, 212 .pr_output = NULL, 213 .pr_ctlinput = sctp_ctlinput, 214 .pr_ctloutput = sctp_ctloutput, 215 216 .pr_ctlport = cpu0_ctlport, 217 .pr_drain = sctp_drain, 218 .pr_usrreqs = &sctp_usrreqs 219 }, 220 #endif /* SCTP */ 221 { 222 .pr_type = SOCK_RAW, 223 .pr_domain = &inetdomain, 224 .pr_protocol = IPPROTO_RAW, 225 .pr_flags = PR_ATOMIC|PR_ADDR, 226 227 .pr_input = rip_input, 228 .pr_output = NULL, 229 .pr_ctlinput = rip_ctlinput, 230 .pr_ctloutput = rip_ctloutput, 231 232 .pr_ctlport = cpu0_ctlport, 233 .pr_usrreqs = &rip_usrreqs 234 }, 235 { 236 .pr_type = SOCK_RAW, 237 .pr_domain = &inetdomain, 238 .pr_protocol = IPPROTO_ICMP, 239 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 240 241 .pr_input = icmp_input, 242 .pr_output = NULL, 243 .pr_ctlinput = NULL, 244 .pr_ctloutput = rip_ctloutput, 245 246 .pr_usrreqs = &rip_usrreqs 247 }, 248 { 249 .pr_type = SOCK_RAW, 250 .pr_domain = &inetdomain, 251 .pr_protocol = IPPROTO_IGMP, 252 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 253 254 .pr_input = igmp_input, 255 .pr_output = NULL, 256 .pr_ctlinput = NULL, 257 .pr_ctloutput = rip_ctloutput, 258 259 .pr_init = igmp_init, 260 .pr_fasttimo = igmp_fasttimo, 261 .pr_slowtimo = igmp_slowtimo, 262 .pr_drain = NULL, 263 .pr_usrreqs = &rip_usrreqs 264 }, 265 { 266 .pr_type = SOCK_RAW, 267 .pr_domain = &inetdomain, 268 .pr_protocol = IPPROTO_RSVP, 269 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 270 271 .pr_input = rsvp_input, 272 .pr_output = NULL, 273 .pr_ctlinput = NULL, 274 .pr_ctloutput = rip_ctloutput, 275 276 .pr_usrreqs = &rip_usrreqs 277 }, 278 #ifdef IPSEC 279 { 280 .pr_type = SOCK_RAW, 281 .pr_domain = &inetdomain, 282 .pr_protocol = IPPROTO_AH, 283 .pr_flags = PR_ATOMIC|PR_ADDR, 284 285 .pr_input = ah4_input, 286 .pr_output = NULL, 287 .pr_ctlinput = NULL, 288 .pr_ctloutput = NULL, 289 290 .pr_ctlport = NULL, 291 .pr_usrreqs = &nousrreqs 292 }, 293 #ifdef IPSEC_ESP 294 { 295 .pr_type = SOCK_RAW, 296 .pr_domain = &inetdomain, 297 .pr_protocol = IPPROTO_ESP, 298 .pr_flags = PR_ATOMIC|PR_ADDR, 299 300 .pr_input = esp4_input, 301 .pr_output = NULL, 302 .pr_ctlinput = NULL, 303 .pr_ctloutput = NULL, 304 305 .pr_ctlport = NULL, 306 .pr_usrreqs = &nousrreqs 307 }, 308 #endif 309 { 310 .pr_type = SOCK_RAW, 311 .pr_domain = &inetdomain, 312 .pr_protocol = IPPROTO_IPCOMP, 313 .pr_flags = PR_ATOMIC|PR_ADDR, 314 315 .pr_input = ipcomp4_input, 316 .pr_output = 0, 317 .pr_ctlinput = NULL, 318 .pr_ctloutput = NULL, 319 320 .pr_ctlport = NULL, 321 .pr_usrreqs = &nousrreqs 322 }, 323 #endif /* IPSEC */ 324 #ifdef FAST_IPSEC 325 { 326 .pr_type = SOCK_RAW, 327 .pr_domain = &inetdomain, 328 .pr_protocol = IPPROTO_AH, 329 .pr_flags = PR_ATOMIC|PR_ADDR, 330 331 .pr_input = ipsec4_common_input, 332 .pr_output = NULL, 333 .pr_ctlinput = NULL, 334 .pr_ctloutput = NULL, 335 336 .pr_ctlport = NULL, 337 .pr_usrreqs = &nousrreqs 338 }, 339 { 340 .pr_type = SOCK_RAW, 341 .pr_domain = &inetdomain, 342 .pr_protocol = IPPROTO_ESP, 343 .pr_flags = PR_ATOMIC|PR_ADDR, 344 345 .pr_input = ipsec4_common_input, 346 .pr_output = NULL 347 .pr_ctlinput = NULL, 348 .pr_ctloutput = NULL, 349 350 .pr_ctlport = NULL, 351 .pr_usrreqs = &nousrreqs 352 }, 353 { 354 .pr_type = SOCK_RAW, 355 .pr_domain = &inetdomain, 356 .pr_protocol = IPPROTO_IPCOMP, 357 .pr_flags = PR_ATOMIC|PR_ADDR, 358 359 .pr_input = ipsec4_common_input, 360 .pr_output = NULL, 361 .pr_ctlinput = NULL, 362 .pr_ctloutput = NULL, 363 364 .pr_ctlport = NULL, 365 .pr_usrreqs = &nousrreqs 366 }, 367 #endif /* FAST_IPSEC */ 368 { 369 .pr_type = SOCK_RAW, 370 .pr_domain = &inetdomain, 371 .pr_protocol = IPPROTO_IPV4, 372 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 373 .pr_input = encap4_input, 374 .pr_output = NULL, 375 .pr_ctlinput = NULL, 376 .pr_ctloutput = rip_ctloutput, 377 378 .pr_ctlport = NULL, 379 .pr_init = encap_init, 380 .pr_usrreqs = &rip_usrreqs 381 }, 382 { 383 .pr_type = SOCK_RAW, 384 .pr_domain = &inetdomain, 385 .pr_protocol = IPPROTO_MOBILE, 386 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 387 388 .pr_input = encap4_input, 389 .pr_output = NULL, 390 .pr_ctlinput = NULL, 391 .pr_ctloutput = rip_ctloutput, 392 393 .pr_ctlport = NULL, 394 .pr_init = encap_init, 395 .pr_usrreqs = &rip_usrreqs 396 }, 397 { 398 .pr_type = SOCK_RAW, 399 .pr_domain = &inetdomain, 400 .pr_protocol = IPPROTO_GRE, 401 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 402 403 .pr_input = encap4_input, 404 .pr_output = NULL, 405 .pr_ctlinput = NULL, 406 .pr_ctloutput = rip_ctloutput, 407 408 .pr_ctlport = NULL, 409 .pr_init = encap_init, 410 .pr_usrreqs = &rip_usrreqs 411 }, 412 #ifdef INET6 413 { 414 .pr_type = SOCK_RAW, 415 .pr_domain = &inetdomain, 416 .pr_protocol = IPPROTO_IPV6, 417 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 418 419 .pr_input = encap4_input, 420 .pr_output = NULL, 421 .pr_ctlinput = NULL, 422 .pr_ctloutput = rip_ctloutput, 423 424 .pr_ctlport = NULL, 425 .pr_init = encap_init, 426 .pr_usrreqs = &rip_usrreqs 427 }, 428 #endif 429 #ifdef IPDIVERT 430 { 431 .pr_type = SOCK_RAW, 432 .pr_domain = &inetdomain, 433 .pr_protocol = IPPROTO_DIVERT, 434 .pr_flags = PR_ATOMIC|PR_ADDR, 435 436 .pr_input = div_input, 437 .pr_output = NULL, 438 .pr_ctlinput = NULL, 439 .pr_ctloutput = ip_ctloutput, 440 441 .pr_ctlport = NULL, 442 .pr_init = div_init, 443 .pr_usrreqs = &div_usrreqs 444 }, 445 #endif 446 #ifdef IPXIP 447 { 448 .pr_type = SOCK_RAW, 449 .pr_domain = &inetdomain, 450 .pr_protocol = IPPROTO_IDP, 451 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 452 453 .pr_input = ipxip_input, 454 .pr_output = NULL, 455 .pr_ctlinput = ipxip_ctlinput, 456 .pr_ctloutput = NULL, 457 458 .pr_ctlport = cpu0_ctlport, 459 .pr_usrreqs = &rip_usrreqs 460 }, 461 #endif 462 #ifdef NSIP 463 { 464 .pr_type = SOCK_RAW, 465 .pr_domain = &inetdomain, 466 .pr_protocol = IPPROTO_IDP, 467 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 468 469 .pr_input = idpip_input, 470 .pr_output = NULL, 471 .pr_ctlinput = nsip_ctlinput, 472 .pr_ctloutput = NULL, 473 474 .pr_ctlport = cpu0_ctlport, 475 .pr_usrreqs = &rip_usrreqs 476 }, 477 #endif 478 #ifdef PIM 479 { 480 .pr_type = SOCK_RAW, 481 .pr_domain = &inetdomain, 482 .pr_protocol = IPPROTO_PIM, 483 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 484 485 .pr_input = pim_input, 486 .pr_output = NULL, 487 .pr_ctlinput = NULL, 488 .pr_ctloutput = rip_ctloutput, 489 490 .pr_ctlport = NULL, 491 .pr_usrreqs = &rip_usrreqs 492 }, 493 #endif 494 #ifdef NPFSYNC 495 { 496 .pr_type = SOCK_RAW, 497 .pr_domain = &inetdomain, 498 .pr_protocol = IPPROTO_PFSYNC, 499 .pr_flags = PR_ATOMIC|PR_ADDR, 500 501 .pr_input = pfsync_input, 502 .pr_output = NULL, 503 .pr_ctlinput = NULL, 504 .pr_ctloutput = rip_ctloutput, 505 506 .pr_ctlport = NULL, 507 .pr_usrreqs = &rip_usrreqs 508 }, 509 #endif /* NPFSYNC */ 510 { 511 /* raw wildcard */ 512 .pr_type = SOCK_RAW, 513 .pr_domain = &inetdomain, 514 .pr_protocol = 0, 515 .pr_flags = PR_ATOMIC|PR_ADDR, 516 517 .pr_input = rip_input, 518 .pr_output = NULL, 519 .pr_ctlinput = NULL, 520 .pr_ctloutput = rip_ctloutput, 521 522 .pr_init = rip_init, 523 .pr_ctlport = NULL, 524 .pr_usrreqs = &rip_usrreqs 525 }, 526 #ifdef CARP 527 { 528 .pr_type = SOCK_RAW, 529 .pr_domain = &inetdomain, 530 .pr_protocol = IPPROTO_CARP, 531 .pr_flags = PR_ATOMIC|PR_ADDR, 532 533 .pr_input = carp_input, 534 .pr_output = rip_output, 535 .pr_ctlinput = NULL, 536 .pr_ctloutput = rip_ctloutput, 537 538 .pr_ctlport = NULL, 539 .pr_usrreqs = &rip_usrreqs 540 }, 541 #endif 542 }; 543 544 struct domain inetdomain = { 545 AF_INET, "internet", NULL, NULL, NULL, 546 inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 547 SLIST_ENTRY_INITIALIZER, 548 in_inithead, 32, sizeof(struct sockaddr_in), 549 }; 550 551 DOMAIN_SET(inet); 552 553 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 554 "Internet Family"); 555 556 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 557 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 558 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 559 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 560 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 561 #ifdef FAST_IPSEC 562 /* XXX no protocol # to use, pick something "reserved" */ 563 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 564 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 565 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 566 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 567 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 568 #else 569 #ifdef IPSEC 570 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 571 #endif /* IPSEC */ 572 #endif /* !FAST_IPSEC */ 573 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 574 #ifdef IPDIVERT 575 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 576 #endif 577 #ifdef PIM 578 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 579 #endif 580 #ifdef CARP 581 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 582 #endif 583