in_proto.c revision 1.87
1 /* $NetBSD: in_proto.c,v 1.87 2007/06/13 21:08:29 dyoung 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 1.87 2007/06/13 21:08:29 dyoung 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 "gre.h" 142 #if NGRE > 0 143 #include <netinet/ip_gre.h> 144 #endif 145 146 #include "carp.h" 147 #if NCARP > 0 148 #include <netinet/ip_carp.h> 149 #endif 150 151 #include "etherip.h" 152 #if NETHERIP > 0 153 #include <netinet/ip_etherip.h> 154 #endif 155 156 DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ 157 158 const struct protosw inetsw[] = { 159 { .pr_domain = &inetdomain, 160 .pr_init = ip_init, 161 .pr_output = ip_output, 162 .pr_slowtimo = ip_slowtimo, 163 .pr_drain = ip_drain, 164 }, 165 { .pr_type = SOCK_DGRAM, 166 .pr_domain = &inetdomain, 167 .pr_protocol = IPPROTO_UDP, 168 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 169 .pr_input = udp_input, 170 .pr_ctlinput = udp_ctlinput, 171 .pr_ctloutput = udp_ctloutput, 172 .pr_usrreq = udp_usrreq, 173 .pr_init = udp_init, 174 }, 175 { .pr_type = SOCK_STREAM, 176 .pr_domain = &inetdomain, 177 .pr_protocol = IPPROTO_TCP, 178 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 179 .pr_input = tcp_input, 180 .pr_ctlinput = tcp_ctlinput, 181 .pr_ctloutput = tcp_ctloutput, 182 .pr_usrreq = tcp_usrreq, 183 .pr_init = tcp_init, 184 .pr_slowtimo = tcp_slowtimo, 185 .pr_drain = tcp_drain, 186 }, 187 { .pr_type = SOCK_RAW, 188 .pr_domain = &inetdomain, 189 .pr_protocol = IPPROTO_RAW, 190 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 191 .pr_input = rip_input, 192 .pr_output = rip_output, 193 .pr_ctlinput = rip_ctlinput, 194 .pr_ctloutput = rip_ctloutput, 195 .pr_usrreq = rip_usrreq, 196 }, 197 { .pr_type = SOCK_RAW, 198 .pr_domain = &inetdomain, 199 .pr_protocol = IPPROTO_ICMP, 200 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 201 .pr_input = icmp_input, 202 .pr_output = rip_output, 203 .pr_ctlinput = rip_ctlinput, 204 .pr_ctloutput = rip_ctloutput, 205 .pr_usrreq = rip_usrreq, 206 .pr_init = icmp_init, 207 }, 208 #ifdef GATEWAY 209 { .pr_domain = &inetdomain, 210 .pr_protocol = IPPROTO_IP, 211 .pr_slowtimo = ipflow_slowtimo, 212 }, 213 #endif /* GATEWAY */ 214 #ifdef IPSEC 215 { .pr_type = SOCK_RAW, 216 .pr_domain = &inetdomain, 217 .pr_protocol = IPPROTO_AH, 218 .pr_flags = PR_ATOMIC|PR_ADDR, 219 .pr_input = ah4_input, 220 .pr_ctlinput = ah4_ctlinput, 221 }, 222 #ifdef IPSEC_ESP 223 { .pr_type = SOCK_RAW, 224 .pr_domain = &inetdomain, 225 .pr_protocol = IPPROTO_ESP, 226 .pr_flags = PR_ATOMIC|PR_ADDR, 227 .pr_input = esp4_input, 228 .pr_ctlinput = esp4_ctlinput, 229 }, 230 #endif /* IPSEC_ESP */ 231 { .pr_type = SOCK_RAW, 232 .pr_domain = &inetdomain, 233 .pr_protocol = IPPROTO_IPCOMP, 234 .pr_flags = PR_ATOMIC|PR_ADDR, 235 .pr_input = ipcomp4_input, 236 }, 237 #endif /* IPSEC */ 238 #ifdef FAST_IPSEC 239 { .pr_type = SOCK_RAW, 240 .pr_domain = &inetdomain, 241 .pr_protocol = IPPROTO_AH, 242 .pr_flags = PR_ATOMIC|PR_ADDR, 243 .pr_input = ipsec4_common_input, 244 .pr_ctlinput = ah4_ctlinput, 245 }, 246 { .pr_type = SOCK_RAW, 247 .pr_domain = &inetdomain, 248 .pr_protocol = IPPROTO_ESP, 249 .pr_flags = PR_ATOMIC|PR_ADDR, 250 .pr_input = ipsec4_common_input, 251 .pr_ctlinput = esp4_ctlinput, 252 }, 253 { .pr_type = SOCK_RAW, 254 .pr_domain = &inetdomain, 255 .pr_protocol = IPPROTO_IPCOMP, 256 .pr_flags = PR_ATOMIC|PR_ADDR, 257 .pr_input = ipsec4_common_input, 258 }, 259 #endif /* FAST_IPSEC */ 260 { .pr_type = SOCK_RAW, 261 .pr_domain = &inetdomain, 262 .pr_protocol = IPPROTO_IPV4, 263 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 264 .pr_input = encap4_input, 265 .pr_output = rip_output, 266 .pr_ctlinput = rip_ctlinput, 267 .pr_ctloutput = rip_ctloutput, 268 .pr_usrreq = rip_usrreq, 269 .pr_init = encap_init, 270 }, 271 #ifdef INET6 272 { .pr_type = SOCK_RAW, 273 .pr_domain = &inetdomain, 274 .pr_protocol = IPPROTO_IPV6, 275 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 276 .pr_input = encap4_input, 277 .pr_output = rip_output, 278 .pr_ctlinput = rip_ctlinput, 279 .pr_ctloutput = rip_ctloutput, 280 .pr_usrreq = rip_usrreq, 281 .pr_init = encap_init, 282 }, 283 #endif /* INET6 */ 284 #if NETHERIP > 0 285 { .pr_type = SOCK_RAW, 286 .pr_domain = &inetdomain, 287 .pr_protocol = IPPROTO_ETHERIP, 288 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 289 .pr_input = ip_etherip_input, 290 .pr_output = rip_output, 291 .pr_ctlinput = rip_ctlinput, 292 .pr_ctloutput = rip_ctloutput, 293 .pr_usrreq = rip_usrreq, 294 }, 295 #endif /* NETHERIP > 0 */ 296 #if NCARP > 0 297 { .pr_type = SOCK_RAW, 298 .pr_domain = &inetdomain, 299 .pr_protocol = IPPROTO_CARP, 300 .pr_flags = PR_ATOMIC|PR_ADDR, 301 .pr_input = carp_proto_input, 302 .pr_output = rip_output, 303 .pr_ctloutput = rip_ctloutput, 304 .pr_usrreq = rip_usrreq, 305 }, 306 #endif /* NCARP > 0 */ 307 #if NGRE > 0 308 { .pr_type = SOCK_RAW, 309 .pr_domain = &inetdomain, 310 .pr_protocol = IPPROTO_GRE, 311 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 312 .pr_input = gre_input, 313 .pr_output = rip_output, 314 .pr_ctloutput = rip_ctloutput, 315 .pr_ctlinput = rip_ctlinput, 316 .pr_usrreq = rip_usrreq, 317 }, 318 { .pr_type = SOCK_RAW, 319 .pr_domain = &inetdomain, 320 .pr_protocol = IPPROTO_MOBILE, 321 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 322 .pr_input = gre_mobile_input, 323 .pr_output = rip_output, 324 .pr_ctloutput = rip_ctloutput, 325 .pr_ctlinput = rip_ctlinput, 326 .pr_usrreq = rip_usrreq, 327 }, 328 #endif /* NGRE > 0 */ 329 { .pr_type = SOCK_RAW, 330 .pr_domain = &inetdomain, 331 .pr_protocol = IPPROTO_IGMP, 332 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 333 .pr_input = igmp_input, 334 .pr_output = rip_output, 335 .pr_ctloutput = rip_ctloutput, 336 .pr_ctlinput = rip_ctlinput, 337 .pr_usrreq = rip_usrreq, 338 .pr_fasttimo = igmp_fasttimo, 339 .pr_slowtimo = igmp_slowtimo, 340 }, 341 #ifdef PIM 342 { .pr_type = SOCK_RAW, 343 .pr_domain = &inetdomain, 344 .pr_protocol = IPPROTO_PIM, 345 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 346 .pr_input = pim_input, 347 .pr_output = rip_output, 348 .pr_ctloutput = rip_ctloutput, 349 .pr_ctlinput = rip_ctlinput, 350 .pr_usrreq = rip_usrreq, 351 }, 352 #endif /* PIM */ 353 #ifdef TPIP 354 { .pr_type = SOCK_SEQPACKET, 355 .pr_domain = &inetdomain, 356 .pr_protocol = IPPROTO_TP, 357 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_LASTHDR|PR_ABRTACPTDIS, 358 .pr_input = tpip_input, 359 .pr_ctloutput = tp_ctloutput, 360 .pr_ctlinput = tpip_ctlinput, 361 .pr_usrreq = tp_usrreq, 362 .pr_init = tp_init, 363 .pr_slowtimo = tp_slowtimo, 364 .pr_drain = tp_drain, 365 }, 366 #endif /* TPIP */ 367 #ifdef ISO 368 /* EON (ISO CLNL over IP) */ 369 #ifdef EON 370 { .pr_type = SOCK_RAW, 371 .pr_domain = &inetdomain, 372 .pr_protocol = IPPROTO_EON, 373 .pr_flags = PR_LASTHDR, 374 .pr_input = eoninput, 375 .pr_ctlinput = eonctlinput, 376 .pr_init = eonprotoinit, 377 }, 378 #else 379 { .pr_type = SOCK_RAW, 380 .pr_domain = &inetdomain, 381 .pr_protocol = IPPROTO_EON, 382 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 383 .pr_input = encap4_input, 384 .pr_output = rip_output, 385 .pr_ctloutput = rip_ctloutput, 386 .pr_ctlinput = rip_ctlinput, 387 .pr_usrreq = rip_usrreq, 388 .pr_init = encap_init, 389 }, 390 #endif /* EON */ 391 #endif /* ISO */ 392 /* raw wildcard */ 393 { .pr_type = SOCK_RAW, 394 .pr_domain = &inetdomain, 395 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 396 .pr_input = rip_input, 397 .pr_output = rip_output, 398 .pr_ctloutput = rip_ctloutput, 399 .pr_ctlinput = rip_ctlinput, 400 .pr_usrreq = rip_usrreq, 401 .pr_init = rip_init, 402 }, 403 }; 404 405 extern struct ifqueue ipintrq; 406 407 POOL_INIT(sockaddr_in_pool, sizeof(struct sockaddr_in), 0, 0, 0, 408 "sockaddr_in_pool", NULL, IPL_NET); 409 410 struct domain inetdomain = { 411 .dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL, 412 .dom_externalize = NULL, .dom_dispose = NULL, 413 .dom_protosw = inetsw, 414 .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], 415 .dom_rtattach = rn_inithead, 416 .dom_rtoffset = 32, .dom_maxrtkey = sizeof(struct sockaddr_in), 417 #ifdef IPSELSRC 418 .dom_ifattach = in_domifattach, 419 .dom_ifdetach = in_domifdetach, 420 #else 421 .dom_ifattach = NULL, 422 .dom_ifdetach = NULL, 423 #endif 424 .dom_ifqueues = { &ipintrq, NULL }, 425 .dom_link = { NULL }, 426 .dom_mowner = MOWNER_INIT("",""), 427 .dom_sa_pool = &sockaddr_in_pool, 428 .dom_sa_len = sizeof(struct sockaddr_in), 429 .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), 430 .dom_sa_cmplen = sizeof(struct in_addr), 431 .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) 432 }; 433 434 u_char ip_protox[IPPROTO_MAX]; 435 436 int icmperrppslim = 100; /* 100pps */ 437 438 int 439 sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 440 { 441 uint_fast8_t len; 442 const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), 443 addrend = addrofs + sizeof(struct in_addr); 444 int rc; 445 const struct sockaddr_in *sin1, *sin2; 446 447 sin1 = satocsin(sa1); 448 sin2 = satocsin(sa2); 449 450 len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); 451 452 if (len > addrofs && 453 (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, 454 len - addrofs)) != 0) 455 return rc; 456 457 return sin1->sin_len - sin2->sin_len; 458 } 459
Indexes created Mon Sep 22 13:09:51 GMT 2025