in_proto.c revision 1.94
1 /* $NetBSD: in_proto.c,v 1.94 2008/04/24 11:38:37 ad 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 2008/04/24 11:38:37 ad 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 73 #include <sys/param.h> 74 #include <sys/socket.h> 75 #include <sys/protosw.h> 76 #include <sys/domain.h> 77 #include <sys/mbuf.h> 78 79 #include <net/if.h> 80 #include <net/radix.h> 81 #include <net/route.h> 82 83 #include <netinet/in.h> 84 #include <netinet/in_systm.h> 85 #include <netinet/ip.h> 86 #include <netinet/ip_var.h> 87 #include <netinet/ip_icmp.h> 88 #include <netinet/in_ifattach.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/in_proto.h> 91 92 #ifdef INET6 93 #ifndef INET 94 #include <netinet/in.h> 95 #endif 96 #include <netinet/ip6.h> 97 #endif 98 99 #include <netinet/igmp_var.h> 100 #ifdef PIM 101 #include <netinet/pim_var.h> 102 #endif 103 #include <netinet/tcp.h> 104 #include <netinet/tcp_fsm.h> 105 #include <netinet/tcp_seq.h> 106 #include <netinet/tcp_timer.h> 107 #include <netinet/tcp_var.h> 108 #include <netinet/tcpip.h> 109 #include <netinet/tcp_debug.h> 110 #include <netinet/udp.h> 111 #include <netinet/udp_var.h> 112 #include <netinet/ip_encap.h> 113 114 /* 115 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 116 */ 117 118 #ifdef IPSEC 119 #include <netinet6/ipsec.h> 120 #include <netinet6/ah.h> 121 #ifdef IPSEC_ESP 122 #include <netinet6/esp.h> 123 #endif 124 #include <netinet6/ipcomp.h> 125 #endif /* IPSEC */ 126 127 #ifdef FAST_IPSEC 128 #include <netipsec/ipsec.h> 129 #include <netipsec/key.h> 130 #endif /* FAST_IPSEC */ 131 132 #ifdef TPIP 133 #include <netiso/tp_param.h> 134 #include <netiso/tp_var.h> 135 #endif /* TPIP */ 136 137 #ifdef EON 138 #include <netiso/eonvar.h> 139 #endif /* EON */ 140 141 #include "carp.h" 142 #if NCARP > 0 143 #include <netinet/ip_carp.h> 144 #endif 145 146 #include "etherip.h" 147 #if NETHERIP > 0 148 #include <netinet/ip_etherip.h> 149 #endif 150 151 DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ 152 153 /* Wrappers to acquire kernel_lock. */ 154 155 PR_WRAP_USRREQ(rip_usrreq) 156 PR_WRAP_USRREQ(udp_usrreq) 157 PR_WRAP_USRREQ(tcp_usrreq) 158 159 #define rip_usrreq rip_usrreq_wrapper 160 #define udp_usrreq udp_usrreq_wrapper 161 #define tcp_usrreq tcp_usrreq_wrapper 162 163 PR_WRAP_CTLINPUT(rip_ctlinput) 164 PR_WRAP_CTLINPUT(udp_ctlinput) 165 PR_WRAP_CTLINPUT(tcp_ctlinput) 166 167 #define rip_ctlinput rip_ctlinput_wrapper 168 #define udp_ctlinput udp_ctlinput_wrapper 169 #define tcp_ctlinput tcp_ctlinput_wrapper 170 171 PR_WRAP_CTLOUTPUT(rip_ctloutput) 172 PR_WRAP_CTLOUTPUT(udp_ctloutput) 173 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 174 175 #define rip_ctloutput rip_ctloutput_wrapper 176 #define udp_ctloutput udp_ctloutput_wrapper 177 #define tcp_ctloutput tcp_ctloutput_wrapper 178 179 #if defined(IPSEC) || defined(FAST_IPSEC) 180 PR_WRAP_CTLINPUT(ah4_ctlinput) 181 182 #define ah4_ctlinput ah4_ctlinput_wrapper 183 #endif 184 185 #if defined(IPSEC_ESP) || defined(FAST_IPSEC) 186 PR_WRAP_CTLINPUT(esp4_ctlinput) 187 188 #define esp4_ctlinput esp4_ctlinput_wrapper 189 #endif 190 191 #ifdef TPIP 192 PR_WRAP_CTLOUTPUT(tp_ctloutput) 193 194 #define tp_ctloutput tp_ctloutput_wrapper 195 196 PR_WRAP_CTLINPUT(tpip_ctlinput) 197 198 #define tpip_ctlinput tpip_ctlinput_wrapper 199 #endif 200 201 #ifdef EON 202 PR_WRAP_CTLINPUT(eonctlinput) 203 204 #define eonctlinput eonctlinput_wrapper 205 #endif 206 207 const struct protosw inetsw[] = { 208 { .pr_domain = &inetdomain, 209 .pr_init = ip_init, 210 .pr_output = ip_output, 211 .pr_slowtimo = ip_slowtimo, 212 .pr_drain = ip_drain, 213 }, 214 { .pr_type = SOCK_DGRAM, 215 .pr_domain = &inetdomain, 216 .pr_protocol = IPPROTO_UDP, 217 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 218 .pr_input = udp_input, 219 .pr_ctlinput = udp_ctlinput, 220 .pr_ctloutput = udp_ctloutput, 221 .pr_usrreq = udp_usrreq, 222 .pr_init = udp_init, 223 }, 224 { .pr_type = SOCK_STREAM, 225 .pr_domain = &inetdomain, 226 .pr_protocol = IPPROTO_TCP, 227 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 228 .pr_input = tcp_input, 229 .pr_ctlinput = tcp_ctlinput, 230 .pr_ctloutput = tcp_ctloutput, 231 .pr_usrreq = tcp_usrreq, 232 .pr_init = tcp_init, 233 .pr_slowtimo = tcp_slowtimo, 234 .pr_drain = tcp_drain, 235 }, 236 { .pr_type = SOCK_RAW, 237 .pr_domain = &inetdomain, 238 .pr_protocol = IPPROTO_RAW, 239 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 240 .pr_input = rip_input, 241 .pr_output = rip_output, 242 .pr_ctlinput = rip_ctlinput, 243 .pr_ctloutput = rip_ctloutput, 244 .pr_usrreq = rip_usrreq, 245 }, 246 { .pr_type = SOCK_RAW, 247 .pr_domain = &inetdomain, 248 .pr_protocol = IPPROTO_ICMP, 249 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 250 .pr_input = icmp_input, 251 .pr_output = rip_output, 252 .pr_ctlinput = rip_ctlinput, 253 .pr_ctloutput = rip_ctloutput, 254 .pr_usrreq = rip_usrreq, 255 .pr_init = icmp_init, 256 }, 257 #ifdef GATEWAY 258 { .pr_domain = &inetdomain, 259 .pr_protocol = IPPROTO_IP, 260 .pr_slowtimo = ipflow_slowtimo, 261 }, 262 #endif /* GATEWAY */ 263 #ifdef IPSEC 264 { .pr_type = SOCK_RAW, 265 .pr_domain = &inetdomain, 266 .pr_protocol = IPPROTO_AH, 267 .pr_flags = PR_ATOMIC|PR_ADDR, 268 .pr_input = ah4_input, 269 .pr_ctlinput = ah4_ctlinput, 270 .pr_init = ah4_init, 271 }, 272 #ifdef IPSEC_ESP 273 { .pr_type = SOCK_RAW, 274 .pr_domain = &inetdomain, 275 .pr_protocol = IPPROTO_ESP, 276 .pr_flags = PR_ATOMIC|PR_ADDR, 277 .pr_input = esp4_input, 278 .pr_ctlinput = esp4_ctlinput, 279 .pr_init = esp4_init, 280 }, 281 #endif /* IPSEC_ESP */ 282 { .pr_type = SOCK_RAW, 283 .pr_domain = &inetdomain, 284 .pr_protocol = IPPROTO_IPCOMP, 285 .pr_flags = PR_ATOMIC|PR_ADDR, 286 .pr_input = ipcomp4_input, 287 .pr_init = ipcomp4_init, 288 }, 289 #endif /* IPSEC */ 290 #ifdef FAST_IPSEC 291 { .pr_type = SOCK_RAW, 292 .pr_domain = &inetdomain, 293 .pr_protocol = IPPROTO_AH, 294 .pr_flags = PR_ATOMIC|PR_ADDR, 295 .pr_input = ipsec4_common_input, 296 .pr_ctlinput = ah4_ctlinput, 297 }, 298 { .pr_type = SOCK_RAW, 299 .pr_domain = &inetdomain, 300 .pr_protocol = IPPROTO_ESP, 301 .pr_flags = PR_ATOMIC|PR_ADDR, 302 .pr_input = ipsec4_common_input, 303 .pr_ctlinput = esp4_ctlinput, 304 }, 305 { .pr_type = SOCK_RAW, 306 .pr_domain = &inetdomain, 307 .pr_protocol = IPPROTO_IPCOMP, 308 .pr_flags = PR_ATOMIC|PR_ADDR, 309 .pr_input = ipsec4_common_input, 310 }, 311 #endif /* FAST_IPSEC */ 312 { .pr_type = SOCK_RAW, 313 .pr_domain = &inetdomain, 314 .pr_protocol = IPPROTO_IPV4, 315 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 316 .pr_input = encap4_input, 317 .pr_output = rip_output, 318 .pr_ctlinput = rip_ctlinput, 319 .pr_ctloutput = rip_ctloutput, 320 .pr_usrreq = rip_usrreq, 321 .pr_init = encap_init, 322 }, 323 #ifdef INET6 324 { .pr_type = SOCK_RAW, 325 .pr_domain = &inetdomain, 326 .pr_protocol = IPPROTO_IPV6, 327 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 328 .pr_input = encap4_input, 329 .pr_output = rip_output, 330 .pr_ctlinput = rip_ctlinput, 331 .pr_ctloutput = rip_ctloutput, 332 .pr_usrreq = rip_usrreq, 333 .pr_init = encap_init, 334 }, 335 #endif /* INET6 */ 336 #if NETHERIP > 0 337 { .pr_type = SOCK_RAW, 338 .pr_domain = &inetdomain, 339 .pr_protocol = IPPROTO_ETHERIP, 340 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 341 .pr_input = ip_etherip_input, 342 .pr_output = rip_output, 343 .pr_ctlinput = rip_ctlinput, 344 .pr_ctloutput = rip_ctloutput, 345 .pr_usrreq = rip_usrreq, 346 }, 347 #endif /* NETHERIP > 0 */ 348 #if NCARP > 0 349 { .pr_type = SOCK_RAW, 350 .pr_domain = &inetdomain, 351 .pr_protocol = IPPROTO_CARP, 352 .pr_flags = PR_ATOMIC|PR_ADDR, 353 .pr_input = carp_proto_input, 354 .pr_output = rip_output, 355 .pr_ctloutput = rip_ctloutput, 356 .pr_usrreq = rip_usrreq, 357 }, 358 #endif /* NCARP > 0 */ 359 { .pr_type = SOCK_RAW, 360 .pr_domain = &inetdomain, 361 .pr_protocol = IPPROTO_IGMP, 362 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 363 .pr_input = igmp_input, 364 .pr_output = rip_output, 365 .pr_ctloutput = rip_ctloutput, 366 .pr_ctlinput = rip_ctlinput, 367 .pr_usrreq = rip_usrreq, 368 .pr_fasttimo = igmp_fasttimo, 369 .pr_slowtimo = igmp_slowtimo, 370 .pr_init = igmp_init, 371 }, 372 #ifdef PIM 373 { .pr_type = SOCK_RAW, 374 .pr_domain = &inetdomain, 375 .pr_protocol = IPPROTO_PIM, 376 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 377 .pr_input = pim_input, 378 .pr_output = rip_output, 379 .pr_ctloutput = rip_ctloutput, 380 .pr_ctlinput = rip_ctlinput, 381 .pr_usrreq = rip_usrreq, 382 }, 383 #endif /* PIM */ 384 #ifdef TPIP 385 { .pr_type = SOCK_SEQPACKET, 386 .pr_domain = &inetdomain, 387 .pr_protocol = IPPROTO_TP, 388 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_LASTHDR|PR_ABRTACPTDIS, 389 .pr_input = tpip_input, 390 .pr_ctloutput = tp_ctloutput, 391 .pr_ctlinput = tpip_ctlinput, 392 .pr_usrreq = tp_usrreq, 393 .pr_init = tp_init, 394 .pr_slowtimo = tp_slowtimo, 395 .pr_drain = tp_drain, 396 }, 397 #endif /* TPIP */ 398 #ifdef ISO 399 /* EON (ISO CLNL over IP) */ 400 #ifdef EON 401 { .pr_type = SOCK_RAW, 402 .pr_domain = &inetdomain, 403 .pr_protocol = IPPROTO_EON, 404 .pr_flags = PR_LASTHDR, 405 .pr_input = eoninput, 406 .pr_ctlinput = eonctlinput, 407 .pr_init = eonprotoinit, 408 }, 409 #else 410 { .pr_type = SOCK_RAW, 411 .pr_domain = &inetdomain, 412 .pr_protocol = IPPROTO_EON, 413 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 414 .pr_input = encap4_input, 415 .pr_output = rip_output, 416 .pr_ctloutput = rip_ctloutput, 417 .pr_ctlinput = rip_ctlinput, 418 .pr_usrreq = rip_usrreq, 419 .pr_init = encap_init, 420 }, 421 #endif /* EON */ 422 #endif /* ISO */ 423 /* raw wildcard */ 424 { .pr_type = SOCK_RAW, 425 .pr_domain = &inetdomain, 426 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 427 .pr_input = rip_input, 428 .pr_output = rip_output, 429 .pr_ctloutput = rip_ctloutput, 430 .pr_ctlinput = rip_ctlinput, 431 .pr_usrreq = rip_usrreq, 432 .pr_init = rip_init, 433 }, 434 }; 435 436 extern struct ifqueue ipintrq; 437 438 const struct sockaddr_in in_any = { 439 .sin_len = sizeof(struct sockaddr_in) 440 , .sin_family = AF_INET 441 , .sin_port = 0 442 , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} 443 }; 444 445 struct domain inetdomain = { 446 .dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL, 447 .dom_externalize = NULL, .dom_dispose = NULL, 448 .dom_protosw = inetsw, 449 .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], 450 .dom_rtattach = rn_inithead, 451 .dom_rtoffset = 32, .dom_maxrtkey = sizeof(struct sockaddr_in), 452 #ifdef IPSELSRC 453 .dom_ifattach = in_domifattach, 454 .dom_ifdetach = in_domifdetach, 455 #else 456 .dom_ifattach = NULL, 457 .dom_ifdetach = NULL, 458 #endif 459 .dom_ifqueues = { &ipintrq, NULL }, 460 .dom_link = { NULL }, 461 .dom_mowner = MOWNER_INIT("",""), 462 .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), 463 .dom_sa_cmplen = sizeof(struct in_addr), 464 .dom_sa_any = (const struct sockaddr *)&in_any, 465 .dom_sockaddr_const_addr = sockaddr_in_const_addr, 466 .dom_sockaddr_addr = sockaddr_in_addr, 467 .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) 468 }; 469 470 u_char ip_protox[IPPROTO_MAX]; 471 472 int icmperrppslim = 100; /* 100pps */ 473 474 static void 475 sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) 476 { 477 socklen_t slen; 478 479 if (slenp == NULL) 480 return; 481 482 slen = sockaddr_getlen(sa); 483 *slenp = (socklen_t)MIN(sizeof(struct in_addr), 484 slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); 485 } 486 487 const void * 488 sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) 489 { 490 const struct sockaddr_in *sin; 491 492 sockaddr_in_addrlen(sa, slenp); 493 sin = (const struct sockaddr_in *)sa; 494 return &sin->sin_addr; 495 } 496 497 void * 498 sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) 499 { 500 struct sockaddr_in *sin; 501 502 sockaddr_in_addrlen(sa, slenp); 503 sin = (struct sockaddr_in *)sa; 504 return &sin->sin_addr; 505 } 506 507 int 508 sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 509 { 510 uint_fast8_t len; 511 const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), 512 addrend = addrofs + sizeof(struct in_addr); 513 int rc; 514 const struct sockaddr_in *sin1, *sin2; 515 516 sin1 = satocsin(sa1); 517 sin2 = satocsin(sa2); 518 519 len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); 520 521 if (len > addrofs && 522 (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, 523 len - addrofs)) != 0) 524 return rc; 525 526 return sin1->sin_len - sin2->sin_len; 527 } 528
Indexes created Tue Sep 23 20:09:58 GMT 2025