in_proto.c revision 1.94.2.1
1 /* $NetBSD: in_proto.c,v 1.94.2.1 2009/05/04 08:14:17 yamt 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 1.94.2.1 2009/05/04 08:14:17 yamt 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 "etherip.h" 148 #if NETHERIP > 0 149 #include <netinet/ip_etherip.h> 150 #endif 151 152 DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ 153 154 /* Wrappers to acquire kernel_lock. */ 155 156 PR_WRAP_USRREQ(rip_usrreq) 157 PR_WRAP_USRREQ(udp_usrreq) 158 PR_WRAP_USRREQ(tcp_usrreq) 159 160 #define rip_usrreq rip_usrreq_wrapper 161 #define udp_usrreq udp_usrreq_wrapper 162 #define tcp_usrreq tcp_usrreq_wrapper 163 164 PR_WRAP_CTLINPUT(rip_ctlinput) 165 PR_WRAP_CTLINPUT(udp_ctlinput) 166 PR_WRAP_CTLINPUT(tcp_ctlinput) 167 168 #define rip_ctlinput rip_ctlinput_wrapper 169 #define udp_ctlinput udp_ctlinput_wrapper 170 #define tcp_ctlinput tcp_ctlinput_wrapper 171 172 PR_WRAP_CTLOUTPUT(rip_ctloutput) 173 PR_WRAP_CTLOUTPUT(udp_ctloutput) 174 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 175 176 #define rip_ctloutput rip_ctloutput_wrapper 177 #define udp_ctloutput udp_ctloutput_wrapper 178 #define tcp_ctloutput tcp_ctloutput_wrapper 179 180 #if defined(IPSEC) || defined(FAST_IPSEC) 181 PR_WRAP_CTLINPUT(ah4_ctlinput) 182 183 #define ah4_ctlinput ah4_ctlinput_wrapper 184 #endif 185 186 #if defined(IPSEC_ESP) || defined(FAST_IPSEC) 187 PR_WRAP_CTLINPUT(esp4_ctlinput) 188 189 #define esp4_ctlinput esp4_ctlinput_wrapper 190 #endif 191 192 #ifdef TPIP 193 PR_WRAP_CTLOUTPUT(tp_ctloutput) 194 195 #define tp_ctloutput tp_ctloutput_wrapper 196 197 PR_WRAP_CTLINPUT(tpip_ctlinput) 198 199 #define tpip_ctlinput tpip_ctlinput_wrapper 200 #endif 201 202 #ifdef EON 203 PR_WRAP_CTLINPUT(eonctlinput) 204 205 #define eonctlinput eonctlinput_wrapper 206 #endif 207 208 const struct protosw inetsw[] = { 209 { .pr_domain = &inetdomain, 210 .pr_init = ip_init, 211 .pr_output = ip_output, 212 .pr_slowtimo = ip_slowtimo, 213 .pr_drain = ip_drain, 214 }, 215 { .pr_type = SOCK_DGRAM, 216 .pr_domain = &inetdomain, 217 .pr_protocol = IPPROTO_UDP, 218 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 219 .pr_input = udp_input, 220 .pr_ctlinput = udp_ctlinput, 221 .pr_ctloutput = udp_ctloutput, 222 .pr_usrreq = udp_usrreq, 223 .pr_init = udp_init, 224 }, 225 { .pr_type = SOCK_STREAM, 226 .pr_domain = &inetdomain, 227 .pr_protocol = IPPROTO_TCP, 228 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 229 .pr_input = tcp_input, 230 .pr_ctlinput = tcp_ctlinput, 231 .pr_ctloutput = tcp_ctloutput, 232 .pr_usrreq = tcp_usrreq, 233 .pr_init = tcp_init, 234 .pr_slowtimo = tcp_slowtimo, 235 .pr_drain = tcp_drain, 236 }, 237 { .pr_type = SOCK_RAW, 238 .pr_domain = &inetdomain, 239 .pr_protocol = IPPROTO_RAW, 240 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 241 .pr_input = rip_input, 242 .pr_output = rip_output, 243 .pr_ctlinput = rip_ctlinput, 244 .pr_ctloutput = rip_ctloutput, 245 .pr_usrreq = rip_usrreq, 246 }, 247 { .pr_type = SOCK_RAW, 248 .pr_domain = &inetdomain, 249 .pr_protocol = IPPROTO_ICMP, 250 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 251 .pr_input = icmp_input, 252 .pr_output = rip_output, 253 .pr_ctlinput = rip_ctlinput, 254 .pr_ctloutput = rip_ctloutput, 255 .pr_usrreq = rip_usrreq, 256 .pr_init = icmp_init, 257 }, 258 #ifdef GATEWAY 259 { .pr_domain = &inetdomain, 260 .pr_protocol = IPPROTO_IP, 261 .pr_slowtimo = ipflow_slowtimo, 262 .pr_init = ipflow_poolinit, 263 }, 264 #endif /* GATEWAY */ 265 #ifdef IPSEC 266 { .pr_type = SOCK_RAW, 267 .pr_domain = &inetdomain, 268 .pr_protocol = IPPROTO_AH, 269 .pr_flags = PR_ATOMIC|PR_ADDR, 270 .pr_input = ah4_input, 271 .pr_ctlinput = ah4_ctlinput, 272 .pr_init = ah4_init, 273 }, 274 #ifdef IPSEC_ESP 275 { .pr_type = SOCK_RAW, 276 .pr_domain = &inetdomain, 277 .pr_protocol = IPPROTO_ESP, 278 .pr_flags = PR_ATOMIC|PR_ADDR, 279 .pr_input = esp4_input, 280 .pr_ctlinput = esp4_ctlinput, 281 .pr_init = esp4_init, 282 }, 283 #endif /* IPSEC_ESP */ 284 { .pr_type = SOCK_RAW, 285 .pr_domain = &inetdomain, 286 .pr_protocol = IPPROTO_IPCOMP, 287 .pr_flags = PR_ATOMIC|PR_ADDR, 288 .pr_input = ipcomp4_input, 289 .pr_init = ipcomp4_init, 290 }, 291 #endif /* IPSEC */ 292 #ifdef FAST_IPSEC 293 { .pr_type = SOCK_RAW, 294 .pr_domain = &inetdomain, 295 .pr_protocol = IPPROTO_AH, 296 .pr_flags = PR_ATOMIC|PR_ADDR, 297 .pr_input = ipsec4_common_input, 298 .pr_ctlinput = ah4_ctlinput, 299 }, 300 { .pr_type = SOCK_RAW, 301 .pr_domain = &inetdomain, 302 .pr_protocol = IPPROTO_ESP, 303 .pr_flags = PR_ATOMIC|PR_ADDR, 304 .pr_input = ipsec4_common_input, 305 .pr_ctlinput = esp4_ctlinput, 306 }, 307 { .pr_type = SOCK_RAW, 308 .pr_domain = &inetdomain, 309 .pr_protocol = IPPROTO_IPCOMP, 310 .pr_flags = PR_ATOMIC|PR_ADDR, 311 .pr_input = ipsec4_common_input, 312 }, 313 #endif /* FAST_IPSEC */ 314 { .pr_type = SOCK_RAW, 315 .pr_domain = &inetdomain, 316 .pr_protocol = IPPROTO_IPV4, 317 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 318 .pr_input = encap4_input, 319 .pr_output = rip_output, 320 .pr_ctlinput = rip_ctlinput, 321 .pr_ctloutput = rip_ctloutput, 322 .pr_usrreq = rip_usrreq, 323 .pr_init = encap_init, 324 }, 325 #ifdef INET6 326 { .pr_type = SOCK_RAW, 327 .pr_domain = &inetdomain, 328 .pr_protocol = IPPROTO_IPV6, 329 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 330 .pr_input = encap4_input, 331 .pr_output = rip_output, 332 .pr_ctlinput = rip_ctlinput, 333 .pr_ctloutput = rip_ctloutput, 334 .pr_usrreq = rip_usrreq, 335 .pr_init = encap_init, 336 }, 337 #endif /* INET6 */ 338 #if NETHERIP > 0 339 { .pr_type = SOCK_RAW, 340 .pr_domain = &inetdomain, 341 .pr_protocol = IPPROTO_ETHERIP, 342 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 343 .pr_input = ip_etherip_input, 344 .pr_output = rip_output, 345 .pr_ctlinput = rip_ctlinput, 346 .pr_ctloutput = rip_ctloutput, 347 .pr_usrreq = rip_usrreq, 348 }, 349 #endif /* NETHERIP > 0 */ 350 #if NCARP > 0 351 { .pr_type = SOCK_RAW, 352 .pr_domain = &inetdomain, 353 .pr_protocol = IPPROTO_CARP, 354 .pr_flags = PR_ATOMIC|PR_ADDR, 355 .pr_input = carp_proto_input, 356 .pr_output = rip_output, 357 .pr_ctloutput = rip_ctloutput, 358 .pr_usrreq = rip_usrreq, 359 }, 360 #endif /* NCARP > 0 */ 361 { .pr_type = SOCK_RAW, 362 .pr_domain = &inetdomain, 363 .pr_protocol = IPPROTO_IGMP, 364 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 365 .pr_input = igmp_input, 366 .pr_output = rip_output, 367 .pr_ctloutput = rip_ctloutput, 368 .pr_ctlinput = rip_ctlinput, 369 .pr_usrreq = rip_usrreq, 370 .pr_fasttimo = igmp_fasttimo, 371 .pr_slowtimo = igmp_slowtimo, 372 .pr_init = igmp_init, 373 }, 374 #ifdef PIM 375 { .pr_type = SOCK_RAW, 376 .pr_domain = &inetdomain, 377 .pr_protocol = IPPROTO_PIM, 378 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 379 .pr_input = pim_input, 380 .pr_output = rip_output, 381 .pr_ctloutput = rip_ctloutput, 382 .pr_ctlinput = rip_ctlinput, 383 .pr_usrreq = rip_usrreq, 384 }, 385 #endif /* PIM */ 386 #ifdef TPIP 387 { .pr_type = SOCK_SEQPACKET, 388 .pr_domain = &inetdomain, 389 .pr_protocol = IPPROTO_TP, 390 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_LASTHDR|PR_ABRTACPTDIS, 391 .pr_input = tpip_input, 392 .pr_ctloutput = tp_ctloutput, 393 .pr_ctlinput = tpip_ctlinput, 394 .pr_usrreq = tp_usrreq, 395 .pr_init = tp_init, 396 .pr_slowtimo = tp_slowtimo, 397 .pr_drain = tp_drain, 398 }, 399 #endif /* TPIP */ 400 #ifdef ISO 401 /* EON (ISO CLNL over IP) */ 402 #ifdef EON 403 { .pr_type = SOCK_RAW, 404 .pr_domain = &inetdomain, 405 .pr_protocol = IPPROTO_EON, 406 .pr_flags = PR_LASTHDR, 407 .pr_input = eoninput, 408 .pr_ctlinput = eonctlinput, 409 .pr_init = eonprotoinit, 410 }, 411 #else 412 { .pr_type = SOCK_RAW, 413 .pr_domain = &inetdomain, 414 .pr_protocol = IPPROTO_EON, 415 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 416 .pr_input = encap4_input, 417 .pr_output = rip_output, 418 .pr_ctloutput = rip_ctloutput, 419 .pr_ctlinput = rip_ctlinput, 420 .pr_usrreq = rip_usrreq, 421 .pr_init = encap_init, 422 }, 423 #endif /* EON */ 424 #endif /* ISO */ 425 /* raw wildcard */ 426 { .pr_type = SOCK_RAW, 427 .pr_domain = &inetdomain, 428 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 429 .pr_input = rip_input, 430 .pr_output = rip_output, 431 .pr_ctloutput = rip_ctloutput, 432 .pr_ctlinput = rip_ctlinput, 433 .pr_usrreq = rip_usrreq, 434 .pr_init = rip_init, 435 }, 436 }; 437 438 extern struct ifqueue ipintrq; 439 440 const struct sockaddr_in in_any = { 441 .sin_len = sizeof(struct sockaddr_in) 442 , .sin_family = AF_INET 443 , .sin_port = 0 444 , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} 445 }; 446 447 struct domain inetdomain = { 448 .dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL, 449 .dom_externalize = NULL, .dom_dispose = NULL, 450 .dom_protosw = inetsw, 451 .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], 452 .dom_rtattach = rn_inithead, 453 .dom_rtoffset = 32, 454 .dom_maxrtkey = sizeof(struct ip_pack4), 455 #ifdef IPSELSRC 456 .dom_ifattach = in_domifattach, 457 .dom_ifdetach = in_domifdetach, 458 #else 459 .dom_ifattach = NULL, 460 .dom_ifdetach = NULL, 461 #endif 462 .dom_ifqueues = { &ipintrq, NULL }, 463 .dom_link = { NULL }, 464 .dom_mowner = MOWNER_INIT("",""), 465 .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), 466 .dom_sa_cmplen = sizeof(struct in_addr), 467 .dom_sa_any = (const struct sockaddr *)&in_any, 468 .dom_sockaddr_const_addr = sockaddr_in_const_addr, 469 .dom_sockaddr_addr = sockaddr_in_addr, 470 .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) 471 }; 472 473 u_char ip_protox[IPPROTO_MAX]; 474 475 int icmperrppslim = 100; /* 100pps */ 476 477 static void 478 sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) 479 { 480 socklen_t slen; 481 482 if (slenp == NULL) 483 return; 484 485 slen = sockaddr_getlen(sa); 486 *slenp = (socklen_t)MIN(sizeof(struct in_addr), 487 slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); 488 } 489 490 const void * 491 sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) 492 { 493 const struct sockaddr_in *sin; 494 495 sockaddr_in_addrlen(sa, slenp); 496 sin = (const struct sockaddr_in *)sa; 497 return &sin->sin_addr; 498 } 499 500 void * 501 sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) 502 { 503 struct sockaddr_in *sin; 504 505 sockaddr_in_addrlen(sa, slenp); 506 sin = (struct sockaddr_in *)sa; 507 return &sin->sin_addr; 508 } 509 510 int 511 sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 512 { 513 uint_fast8_t len; 514 const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), 515 addrend = addrofs + sizeof(struct in_addr); 516 int rc; 517 const struct sockaddr_in *sin1, *sin2; 518 519 sin1 = satocsin(sa1); 520 sin2 = satocsin(sa2); 521 522 len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); 523 524 if (len > addrofs && 525 (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, 526 len - addrofs)) != 0) 527 return rc; 528 529 return sin1->sin_len - sin2->sin_len; 530 } 531
Indexes created Wed Oct 15 16:09:53 GMT 2025