in_proto.c revision 1.98
1 /* $NetBSD: in_proto.c,v 1.98 2009/09/14 10:36:50 degroote Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: in_proto.c,v 1.98 2009/09/14 10:36:50 degroote Exp $"); 65 66 #include "opt_mrouting.h" 67 #include "opt_eon.h" /* ISO CLNL over IP */ 68 #include "opt_iso.h" /* ISO TP tunneled over IP */ 69 #include "opt_inet.h" 70 #include "opt_ipsec.h" 71 #include "opt_pim.h" 72 #include "opt_gateway.h" 73 74 #include <sys/param.h> 75 #include <sys/socket.h> 76 #include <sys/protosw.h> 77 #include <sys/domain.h> 78 #include <sys/mbuf.h> 79 80 #include <net/if.h> 81 #include <net/radix.h> 82 #include <net/route.h> 83 84 #include <netinet/in.h> 85 #include <netinet/in_systm.h> 86 #include <netinet/ip.h> 87 #include <netinet/ip_var.h> 88 #include <netinet/ip_icmp.h> 89 #include <netinet/in_ifattach.h> 90 #include <netinet/in_pcb.h> 91 #include <netinet/in_proto.h> 92 93 #ifdef INET6 94 #ifndef INET 95 #include <netinet/in.h> 96 #endif 97 #include <netinet/ip6.h> 98 #endif 99 100 #include <netinet/igmp_var.h> 101 #ifdef PIM 102 #include <netinet/pim_var.h> 103 #endif 104 #include <netinet/tcp.h> 105 #include <netinet/tcp_fsm.h> 106 #include <netinet/tcp_seq.h> 107 #include <netinet/tcp_timer.h> 108 #include <netinet/tcp_var.h> 109 #include <netinet/tcpip.h> 110 #include <netinet/tcp_debug.h> 111 #include <netinet/udp.h> 112 #include <netinet/udp_var.h> 113 #include <netinet/ip_encap.h> 114 115 /* 116 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 117 */ 118 119 #ifdef IPSEC 120 #include <netinet6/ipsec.h> 121 #include <netinet6/ah.h> 122 #ifdef IPSEC_ESP 123 #include <netinet6/esp.h> 124 #endif 125 #include <netinet6/ipcomp.h> 126 #endif /* IPSEC */ 127 128 #ifdef FAST_IPSEC 129 #include <netipsec/ipsec.h> 130 #include <netipsec/key.h> 131 #endif /* FAST_IPSEC */ 132 133 #ifdef TPIP 134 #include <netiso/tp_param.h> 135 #include <netiso/tp_var.h> 136 #endif /* TPIP */ 137 138 #ifdef EON 139 #include <netiso/eonvar.h> 140 #endif /* EON */ 141 142 #include "carp.h" 143 #if NCARP > 0 144 #include <netinet/ip_carp.h> 145 #endif 146 147 #include "pfsync.h" 148 #if NPFSYNC > 0 149 #include <net/pfvar.h> 150 #include <net/if_pfsync.h> 151 #endif 152 153 #include "etherip.h" 154 #if NETHERIP > 0 155 #include <netinet/ip_etherip.h> 156 #endif 157 158 DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ 159 160 /* Wrappers to acquire kernel_lock. */ 161 162 PR_WRAP_USRREQ(rip_usrreq) 163 PR_WRAP_USRREQ(udp_usrreq) 164 PR_WRAP_USRREQ(tcp_usrreq) 165 166 #define rip_usrreq rip_usrreq_wrapper 167 #define udp_usrreq udp_usrreq_wrapper 168 #define tcp_usrreq tcp_usrreq_wrapper 169 170 PR_WRAP_CTLINPUT(rip_ctlinput) 171 PR_WRAP_CTLINPUT(udp_ctlinput) 172 PR_WRAP_CTLINPUT(tcp_ctlinput) 173 174 #define rip_ctlinput rip_ctlinput_wrapper 175 #define udp_ctlinput udp_ctlinput_wrapper 176 #define tcp_ctlinput tcp_ctlinput_wrapper 177 178 PR_WRAP_CTLOUTPUT(rip_ctloutput) 179 PR_WRAP_CTLOUTPUT(udp_ctloutput) 180 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 181 182 #define rip_ctloutput rip_ctloutput_wrapper 183 #define udp_ctloutput udp_ctloutput_wrapper 184 #define tcp_ctloutput tcp_ctloutput_wrapper 185 186 #if defined(IPSEC) || defined(FAST_IPSEC) 187 PR_WRAP_CTLINPUT(ah4_ctlinput) 188 189 #define ah4_ctlinput ah4_ctlinput_wrapper 190 #endif 191 192 #if defined(IPSEC_ESP) || defined(FAST_IPSEC) 193 PR_WRAP_CTLINPUT(esp4_ctlinput) 194 195 #define esp4_ctlinput esp4_ctlinput_wrapper 196 #endif 197 198 #ifdef TPIP 199 PR_WRAP_CTLOUTPUT(tp_ctloutput) 200 201 #define tp_ctloutput tp_ctloutput_wrapper 202 203 PR_WRAP_CTLINPUT(tpip_ctlinput) 204 205 #define tpip_ctlinput tpip_ctlinput_wrapper 206 #endif 207 208 #ifdef EON 209 PR_WRAP_CTLINPUT(eonctlinput) 210 211 #define eonctlinput eonctlinput_wrapper 212 #endif 213 214 const struct protosw inetsw[] = { 215 { .pr_domain = &inetdomain, 216 .pr_init = ip_init, 217 .pr_output = ip_output, 218 .pr_slowtimo = ip_slowtimo, 219 .pr_drain = ip_drain, 220 }, 221 { .pr_type = SOCK_DGRAM, 222 .pr_domain = &inetdomain, 223 .pr_protocol = IPPROTO_UDP, 224 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 225 .pr_input = udp_input, 226 .pr_ctlinput = udp_ctlinput, 227 .pr_ctloutput = udp_ctloutput, 228 .pr_usrreq = udp_usrreq, 229 .pr_init = udp_init, 230 }, 231 { .pr_type = SOCK_STREAM, 232 .pr_domain = &inetdomain, 233 .pr_protocol = IPPROTO_TCP, 234 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 235 .pr_input = tcp_input, 236 .pr_ctlinput = tcp_ctlinput, 237 .pr_ctloutput = tcp_ctloutput, 238 .pr_usrreq = tcp_usrreq, 239 .pr_init = tcp_init, 240 .pr_slowtimo = tcp_slowtimo, 241 .pr_drain = tcp_drain, 242 }, 243 { .pr_type = SOCK_RAW, 244 .pr_domain = &inetdomain, 245 .pr_protocol = IPPROTO_RAW, 246 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 247 .pr_input = rip_input, 248 .pr_output = rip_output, 249 .pr_ctlinput = rip_ctlinput, 250 .pr_ctloutput = rip_ctloutput, 251 .pr_usrreq = rip_usrreq, 252 }, 253 { .pr_type = SOCK_RAW, 254 .pr_domain = &inetdomain, 255 .pr_protocol = IPPROTO_ICMP, 256 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 257 .pr_input = icmp_input, 258 .pr_output = rip_output, 259 .pr_ctlinput = rip_ctlinput, 260 .pr_ctloutput = rip_ctloutput, 261 .pr_usrreq = rip_usrreq, 262 .pr_init = icmp_init, 263 }, 264 #ifdef GATEWAY 265 { .pr_domain = &inetdomain, 266 .pr_protocol = IPPROTO_IP, 267 .pr_slowtimo = ipflow_slowtimo, 268 .pr_init = ipflow_poolinit, 269 }, 270 #endif /* GATEWAY */ 271 #ifdef IPSEC 272 { .pr_type = SOCK_RAW, 273 .pr_domain = &inetdomain, 274 .pr_protocol = IPPROTO_AH, 275 .pr_flags = PR_ATOMIC|PR_ADDR, 276 .pr_input = ah4_input, 277 .pr_ctlinput = ah4_ctlinput, 278 .pr_init = ah4_init, 279 }, 280 #ifdef IPSEC_ESP 281 { .pr_type = SOCK_RAW, 282 .pr_domain = &inetdomain, 283 .pr_protocol = IPPROTO_ESP, 284 .pr_flags = PR_ATOMIC|PR_ADDR, 285 .pr_input = esp4_input, 286 .pr_ctlinput = esp4_ctlinput, 287 .pr_init = esp4_init, 288 }, 289 #endif /* IPSEC_ESP */ 290 { .pr_type = SOCK_RAW, 291 .pr_domain = &inetdomain, 292 .pr_protocol = IPPROTO_IPCOMP, 293 .pr_flags = PR_ATOMIC|PR_ADDR, 294 .pr_input = ipcomp4_input, 295 .pr_init = ipcomp4_init, 296 }, 297 #endif /* IPSEC */ 298 #ifdef FAST_IPSEC 299 { .pr_type = SOCK_RAW, 300 .pr_domain = &inetdomain, 301 .pr_protocol = IPPROTO_AH, 302 .pr_flags = PR_ATOMIC|PR_ADDR, 303 .pr_input = ipsec4_common_input, 304 .pr_ctlinput = ah4_ctlinput, 305 }, 306 { .pr_type = SOCK_RAW, 307 .pr_domain = &inetdomain, 308 .pr_protocol = IPPROTO_ESP, 309 .pr_flags = PR_ATOMIC|PR_ADDR, 310 .pr_input = ipsec4_common_input, 311 .pr_ctlinput = esp4_ctlinput, 312 }, 313 { .pr_type = SOCK_RAW, 314 .pr_domain = &inetdomain, 315 .pr_protocol = IPPROTO_IPCOMP, 316 .pr_flags = PR_ATOMIC|PR_ADDR, 317 .pr_input = ipsec4_common_input, 318 }, 319 #endif /* FAST_IPSEC */ 320 { .pr_type = SOCK_RAW, 321 .pr_domain = &inetdomain, 322 .pr_protocol = IPPROTO_IPV4, 323 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 324 .pr_input = encap4_input, 325 .pr_output = rip_output, 326 .pr_ctlinput = rip_ctlinput, 327 .pr_ctloutput = rip_ctloutput, 328 .pr_usrreq = rip_usrreq, 329 .pr_init = encap_init, 330 }, 331 #ifdef INET6 332 { .pr_type = SOCK_RAW, 333 .pr_domain = &inetdomain, 334 .pr_protocol = IPPROTO_IPV6, 335 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 336 .pr_input = encap4_input, 337 .pr_output = rip_output, 338 .pr_ctlinput = rip_ctlinput, 339 .pr_ctloutput = rip_ctloutput, 340 .pr_usrreq = rip_usrreq, 341 .pr_init = encap_init, 342 }, 343 #endif /* INET6 */ 344 #if NETHERIP > 0 345 { .pr_type = SOCK_RAW, 346 .pr_domain = &inetdomain, 347 .pr_protocol = IPPROTO_ETHERIP, 348 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 349 .pr_input = ip_etherip_input, 350 .pr_output = rip_output, 351 .pr_ctlinput = rip_ctlinput, 352 .pr_ctloutput = rip_ctloutput, 353 .pr_usrreq = rip_usrreq, 354 }, 355 #endif /* NETHERIP > 0 */ 356 #if NCARP > 0 357 { .pr_type = SOCK_RAW, 358 .pr_domain = &inetdomain, 359 .pr_protocol = IPPROTO_CARP, 360 .pr_flags = PR_ATOMIC|PR_ADDR, 361 .pr_input = carp_proto_input, 362 .pr_output = rip_output, 363 .pr_ctloutput = rip_ctloutput, 364 .pr_usrreq = rip_usrreq, 365 }, 366 #endif /* NCARP > 0 */ 367 #if NPFSYNC > 0 368 { .pr_type = SOCK_RAW, 369 .pr_domain = &inetdomain, 370 .pr_protocol = IPPROTO_PFSYNC, 371 .pr_flags = PR_ATOMIC|PR_ADDR, 372 .pr_input = pfsync_input, 373 .pr_output = rip_output, 374 .pr_ctloutput = rip_ctloutput, 375 .pr_usrreq = rip_usrreq, 376 }, 377 #endif /* NPFSYNC > 0 */ 378 { .pr_type = SOCK_RAW, 379 .pr_domain = &inetdomain, 380 .pr_protocol = IPPROTO_IGMP, 381 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 382 .pr_input = igmp_input, 383 .pr_output = rip_output, 384 .pr_ctloutput = rip_ctloutput, 385 .pr_ctlinput = rip_ctlinput, 386 .pr_usrreq = rip_usrreq, 387 .pr_fasttimo = igmp_fasttimo, 388 .pr_slowtimo = igmp_slowtimo, 389 .pr_init = igmp_init, 390 }, 391 #ifdef PIM 392 { .pr_type = SOCK_RAW, 393 .pr_domain = &inetdomain, 394 .pr_protocol = IPPROTO_PIM, 395 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 396 .pr_input = pim_input, 397 .pr_output = rip_output, 398 .pr_ctloutput = rip_ctloutput, 399 .pr_ctlinput = rip_ctlinput, 400 .pr_usrreq = rip_usrreq, 401 }, 402 #endif /* PIM */ 403 #ifdef TPIP 404 { .pr_type = SOCK_SEQPACKET, 405 .pr_domain = &inetdomain, 406 .pr_protocol = IPPROTO_TP, 407 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_LASTHDR|PR_ABRTACPTDIS, 408 .pr_input = tpip_input, 409 .pr_ctloutput = tp_ctloutput, 410 .pr_ctlinput = tpip_ctlinput, 411 .pr_usrreq = tp_usrreq, 412 .pr_init = tp_init, 413 .pr_slowtimo = tp_slowtimo, 414 .pr_drain = tp_drain, 415 }, 416 #endif /* TPIP */ 417 #ifdef ISO 418 /* EON (ISO CLNL over IP) */ 419 #ifdef EON 420 { .pr_type = SOCK_RAW, 421 .pr_domain = &inetdomain, 422 .pr_protocol = IPPROTO_EON, 423 .pr_flags = PR_LASTHDR, 424 .pr_input = eoninput, 425 .pr_ctlinput = eonctlinput, 426 .pr_init = eonprotoinit, 427 }, 428 #else 429 { .pr_type = SOCK_RAW, 430 .pr_domain = &inetdomain, 431 .pr_protocol = IPPROTO_EON, 432 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 433 .pr_input = encap4_input, 434 .pr_output = rip_output, 435 .pr_ctloutput = rip_ctloutput, 436 .pr_ctlinput = rip_ctlinput, 437 .pr_usrreq = rip_usrreq, 438 .pr_init = encap_init, 439 }, 440 #endif /* EON */ 441 #endif /* ISO */ 442 /* raw wildcard */ 443 { .pr_type = SOCK_RAW, 444 .pr_domain = &inetdomain, 445 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 446 .pr_input = rip_input, 447 .pr_output = rip_output, 448 .pr_ctloutput = rip_ctloutput, 449 .pr_ctlinput = rip_ctlinput, 450 .pr_usrreq = rip_usrreq, 451 .pr_init = rip_init, 452 }, 453 }; 454 455 extern struct ifqueue ipintrq; 456 457 const struct sockaddr_in in_any = { 458 .sin_len = sizeof(struct sockaddr_in) 459 , .sin_family = AF_INET 460 , .sin_port = 0 461 , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} 462 }; 463 464 struct domain inetdomain = { 465 .dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL, 466 .dom_externalize = NULL, .dom_dispose = NULL, 467 .dom_protosw = inetsw, 468 .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], 469 .dom_rtattach = rn_inithead, 470 .dom_rtoffset = 32, 471 .dom_maxrtkey = sizeof(struct ip_pack4), 472 #ifdef IPSELSRC 473 .dom_ifattach = in_domifattach, 474 .dom_ifdetach = in_domifdetach, 475 #else 476 .dom_ifattach = NULL, 477 .dom_ifdetach = NULL, 478 #endif 479 .dom_ifqueues = { &ipintrq, NULL }, 480 .dom_link = { NULL }, 481 .dom_mowner = MOWNER_INIT("",""), 482 .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), 483 .dom_sa_cmplen = sizeof(struct in_addr), 484 .dom_sa_any = (const struct sockaddr *)&in_any, 485 .dom_sockaddr_const_addr = sockaddr_in_const_addr, 486 .dom_sockaddr_addr = sockaddr_in_addr, 487 .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) 488 }; 489 490 u_char ip_protox[IPPROTO_MAX]; 491 492 int icmperrppslim = 100; /* 100pps */ 493 494 static void 495 sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) 496 { 497 socklen_t slen; 498 499 if (slenp == NULL) 500 return; 501 502 slen = sockaddr_getlen(sa); 503 *slenp = (socklen_t)MIN(sizeof(struct in_addr), 504 slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); 505 } 506 507 const void * 508 sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) 509 { 510 const struct sockaddr_in *sin; 511 512 sockaddr_in_addrlen(sa, slenp); 513 sin = (const struct sockaddr_in *)sa; 514 return &sin->sin_addr; 515 } 516 517 void * 518 sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) 519 { 520 struct sockaddr_in *sin; 521 522 sockaddr_in_addrlen(sa, slenp); 523 sin = (struct sockaddr_in *)sa; 524 return &sin->sin_addr; 525 } 526 527 int 528 sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 529 { 530 uint_fast8_t len; 531 const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), 532 addrend = addrofs + sizeof(struct in_addr); 533 int rc; 534 const struct sockaddr_in *sin1, *sin2; 535 536 sin1 = satocsin(sa1); 537 sin2 = satocsin(sa2); 538 539 len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); 540 541 if (len > addrofs && 542 (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, 543 len - addrofs)) != 0) 544 return rc; 545 546 return sin1->sin_len - sin2->sin_len; 547 } 548
Indexes created Tue Sep 23 13:09:54 GMT 2025