in_proto.c revision 1.104
1 /* $NetBSD: in_proto.c,v 1.104 2013/03/01 18:25:58 joerg 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 1.104 2013/03/01 18:25:58 joerg Exp $"); 65 66 #include "opt_mrouting.h" 67 #include "opt_inet.h" 68 #include "opt_ipsec.h" 69 #include "opt_pim.h" 70 #include "opt_gateway.h" 71 72 #include <sys/param.h> 73 #include <sys/socket.h> 74 #include <sys/protosw.h> 75 #include <sys/domain.h> 76 #include <sys/mbuf.h> 77 78 #include <net/if.h> 79 #include <net/radix.h> 80 #include <net/route.h> 81 82 #include <netinet/in.h> 83 #include <netinet/in_systm.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_var.h> 86 #include <netinet/ip_icmp.h> 87 #include <netinet/in_ifattach.h> 88 #include <netinet/in_pcb.h> 89 #include <netinet/in_proto.h> 90 91 #ifdef INET6 92 #ifndef INET 93 #include <netinet/in.h> 94 #endif 95 #include <netinet/ip6.h> 96 #endif 97 98 #include <netinet/igmp_var.h> 99 #ifdef PIM 100 #include <netinet/pim_var.h> 101 #endif 102 #include <netinet/tcp.h> 103 #include <netinet/tcp_fsm.h> 104 #include <netinet/tcp_seq.h> 105 #include <netinet/tcp_timer.h> 106 #include <netinet/tcp_var.h> 107 #include <netinet/tcpip.h> 108 #include <netinet/tcp_debug.h> 109 #include <netinet/udp.h> 110 #include <netinet/udp_var.h> 111 #include <netinet/ip_encap.h> 112 113 /* 114 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 115 */ 116 117 #ifdef FAST_IPSEC 118 #include <netipsec/ipsec.h> 119 #include <netipsec/key.h> 120 #endif /* FAST_IPSEC */ 121 122 #include "carp.h" 123 #if NCARP > 0 124 #include <netinet/ip_carp.h> 125 #endif 126 127 #include "pfsync.h" 128 #if NPFSYNC > 0 129 #include <net/pfvar.h> 130 #include <net/if_pfsync.h> 131 #endif 132 133 #include "etherip.h" 134 #if NETHERIP > 0 135 #include <netinet/ip_etherip.h> 136 #endif 137 138 DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ 139 140 /* Wrappers to acquire kernel_lock. */ 141 142 PR_WRAP_USRREQ(rip_usrreq) 143 PR_WRAP_USRREQ(udp_usrreq) 144 PR_WRAP_USRREQ(tcp_usrreq) 145 146 #define rip_usrreq rip_usrreq_wrapper 147 #define udp_usrreq udp_usrreq_wrapper 148 #define tcp_usrreq tcp_usrreq_wrapper 149 150 PR_WRAP_CTLINPUT(rip_ctlinput) 151 PR_WRAP_CTLINPUT(udp_ctlinput) 152 PR_WRAP_CTLINPUT(tcp_ctlinput) 153 154 #define rip_ctlinput rip_ctlinput_wrapper 155 #define udp_ctlinput udp_ctlinput_wrapper 156 #define tcp_ctlinput tcp_ctlinput_wrapper 157 158 PR_WRAP_CTLOUTPUT(rip_ctloutput) 159 PR_WRAP_CTLOUTPUT(udp_ctloutput) 160 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 161 162 #define rip_ctloutput rip_ctloutput_wrapper 163 #define udp_ctloutput udp_ctloutput_wrapper 164 #define tcp_ctloutput tcp_ctloutput_wrapper 165 166 #if defined(FAST_IPSEC) 167 PR_WRAP_CTLINPUT(ah4_ctlinput) 168 169 #define ah4_ctlinput ah4_ctlinput_wrapper 170 #endif 171 172 #if defined(IPSEC_ESP) || defined(FAST_IPSEC) 173 PR_WRAP_CTLINPUT(esp4_ctlinput) 174 175 #define esp4_ctlinput esp4_ctlinput_wrapper 176 #endif 177 178 const struct protosw inetsw[] = { 179 { .pr_domain = &inetdomain, 180 .pr_init = ip_init, 181 .pr_output = ip_output, 182 .pr_fasttimo = ip_fasttimo, 183 .pr_slowtimo = ip_slowtimo, 184 .pr_drain = ip_drainstub, 185 }, 186 { .pr_type = SOCK_DGRAM, 187 .pr_domain = &inetdomain, 188 .pr_protocol = IPPROTO_UDP, 189 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 190 .pr_input = udp_input, 191 .pr_ctlinput = udp_ctlinput, 192 .pr_ctloutput = udp_ctloutput, 193 .pr_usrreq = udp_usrreq, 194 .pr_init = udp_init, 195 }, 196 { .pr_type = SOCK_STREAM, 197 .pr_domain = &inetdomain, 198 .pr_protocol = IPPROTO_TCP, 199 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 200 .pr_input = tcp_input, 201 .pr_ctlinput = tcp_ctlinput, 202 .pr_ctloutput = tcp_ctloutput, 203 .pr_usrreq = tcp_usrreq, 204 .pr_init = tcp_init, 205 .pr_fasttimo = tcp_fasttimo, 206 .pr_slowtimo = tcp_slowtimo, 207 .pr_drain = tcp_drainstub, 208 }, 209 { .pr_type = SOCK_RAW, 210 .pr_domain = &inetdomain, 211 .pr_protocol = IPPROTO_RAW, 212 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 213 .pr_input = rip_input, 214 .pr_output = rip_output, 215 .pr_ctlinput = rip_ctlinput, 216 .pr_ctloutput = rip_ctloutput, 217 .pr_usrreq = rip_usrreq, 218 }, 219 { .pr_type = SOCK_RAW, 220 .pr_domain = &inetdomain, 221 .pr_protocol = IPPROTO_ICMP, 222 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 223 .pr_input = icmp_input, 224 .pr_output = rip_output, 225 .pr_ctlinput = rip_ctlinput, 226 .pr_ctloutput = rip_ctloutput, 227 .pr_usrreq = rip_usrreq, 228 .pr_init = icmp_init, 229 }, 230 #ifdef GATEWAY 231 { .pr_domain = &inetdomain, 232 .pr_protocol = IPPROTO_IP, 233 .pr_slowtimo = ipflow_slowtimo, 234 .pr_init = ipflow_poolinit, 235 }, 236 #endif /* GATEWAY */ 237 #ifdef FAST_IPSEC 238 { .pr_type = SOCK_RAW, 239 .pr_domain = &inetdomain, 240 .pr_protocol = IPPROTO_AH, 241 .pr_flags = PR_ATOMIC|PR_ADDR, 242 .pr_input = ipsec4_common_input, 243 .pr_ctlinput = ah4_ctlinput, 244 }, 245 { .pr_type = SOCK_RAW, 246 .pr_domain = &inetdomain, 247 .pr_protocol = IPPROTO_ESP, 248 .pr_flags = PR_ATOMIC|PR_ADDR, 249 .pr_input = ipsec4_common_input, 250 .pr_ctlinput = esp4_ctlinput, 251 }, 252 { .pr_type = SOCK_RAW, 253 .pr_domain = &inetdomain, 254 .pr_protocol = IPPROTO_IPCOMP, 255 .pr_flags = PR_ATOMIC|PR_ADDR, 256 .pr_input = ipsec4_common_input, 257 }, 258 #endif /* FAST_IPSEC */ 259 { .pr_type = SOCK_RAW, 260 .pr_domain = &inetdomain, 261 .pr_protocol = IPPROTO_IPV4, 262 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 263 .pr_input = encap4_input, 264 .pr_output = rip_output, 265 .pr_ctlinput = rip_ctlinput, 266 .pr_ctloutput = rip_ctloutput, 267 .pr_usrreq = rip_usrreq, 268 .pr_init = encap_init, 269 }, 270 #ifdef INET6 271 { .pr_type = SOCK_RAW, 272 .pr_domain = &inetdomain, 273 .pr_protocol = IPPROTO_IPV6, 274 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 275 .pr_input = encap4_input, 276 .pr_output = rip_output, 277 .pr_ctlinput = rip_ctlinput, 278 .pr_ctloutput = rip_ctloutput, 279 .pr_usrreq = rip_usrreq, 280 .pr_init = encap_init, 281 }, 282 #endif /* INET6 */ 283 #if NETHERIP > 0 284 { .pr_type = SOCK_RAW, 285 .pr_domain = &inetdomain, 286 .pr_protocol = IPPROTO_ETHERIP, 287 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 288 .pr_input = ip_etherip_input, 289 .pr_output = rip_output, 290 .pr_ctlinput = rip_ctlinput, 291 .pr_ctloutput = rip_ctloutput, 292 .pr_usrreq = rip_usrreq, 293 }, 294 #endif /* NETHERIP > 0 */ 295 #if NCARP > 0 296 { .pr_type = SOCK_RAW, 297 .pr_domain = &inetdomain, 298 .pr_protocol = IPPROTO_CARP, 299 .pr_flags = PR_ATOMIC|PR_ADDR, 300 .pr_input = carp_proto_input, 301 .pr_output = rip_output, 302 .pr_ctloutput = rip_ctloutput, 303 .pr_usrreq = rip_usrreq, 304 .pr_init = carp_init, 305 }, 306 #endif /* NCARP > 0 */ 307 #if NPFSYNC > 0 308 { .pr_type = SOCK_RAW, 309 .pr_domain = &inetdomain, 310 .pr_protocol = IPPROTO_PFSYNC, 311 .pr_flags = PR_ATOMIC|PR_ADDR, 312 .pr_input = pfsync_input, 313 .pr_output = rip_output, 314 .pr_ctloutput = rip_ctloutput, 315 .pr_usrreq = rip_usrreq, 316 }, 317 #endif /* NPFSYNC > 0 */ 318 { .pr_type = SOCK_RAW, 319 .pr_domain = &inetdomain, 320 .pr_protocol = IPPROTO_IGMP, 321 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 322 .pr_input = igmp_input, 323 .pr_output = rip_output, 324 .pr_ctloutput = rip_ctloutput, 325 .pr_ctlinput = rip_ctlinput, 326 .pr_usrreq = rip_usrreq, 327 .pr_fasttimo = igmp_fasttimo, 328 .pr_slowtimo = igmp_slowtimo, 329 .pr_init = igmp_init, 330 }, 331 #ifdef PIM 332 { .pr_type = SOCK_RAW, 333 .pr_domain = &inetdomain, 334 .pr_protocol = IPPROTO_PIM, 335 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 336 .pr_input = pim_input, 337 .pr_output = rip_output, 338 .pr_ctloutput = rip_ctloutput, 339 .pr_ctlinput = rip_ctlinput, 340 .pr_usrreq = rip_usrreq, 341 }, 342 #endif /* PIM */ 343 /* raw wildcard */ 344 { .pr_type = SOCK_RAW, 345 .pr_domain = &inetdomain, 346 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 347 .pr_input = rip_input, 348 .pr_output = rip_output, 349 .pr_ctloutput = rip_ctloutput, 350 .pr_ctlinput = rip_ctlinput, 351 .pr_usrreq = rip_usrreq, 352 .pr_init = rip_init, 353 }, 354 }; 355 356 extern struct ifqueue ipintrq; 357 358 const struct sockaddr_in in_any = { 359 .sin_len = sizeof(struct sockaddr_in) 360 , .sin_family = AF_INET 361 , .sin_port = 0 362 , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} 363 }; 364 365 struct domain inetdomain = { 366 .dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL, 367 .dom_externalize = NULL, .dom_dispose = NULL, 368 .dom_protosw = inetsw, 369 .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], 370 .dom_rtattach = rt_inithead, 371 .dom_rtoffset = 32, 372 .dom_maxrtkey = sizeof(struct ip_pack4), 373 #ifdef IPSELSRC 374 .dom_ifattach = in_domifattach, 375 .dom_ifdetach = in_domifdetach, 376 #else 377 .dom_ifattach = NULL, 378 .dom_ifdetach = NULL, 379 #endif 380 .dom_ifqueues = { &ipintrq, NULL }, 381 .dom_link = { NULL }, 382 .dom_mowner = MOWNER_INIT("",""), 383 .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), 384 .dom_sa_cmplen = sizeof(struct in_addr), 385 .dom_sa_any = (const struct sockaddr *)&in_any, 386 .dom_sockaddr_const_addr = sockaddr_in_const_addr, 387 .dom_sockaddr_addr = sockaddr_in_addr, 388 .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) 389 }; 390 391 u_char ip_protox[IPPROTO_MAX]; 392 393 int icmperrppslim = 100; /* 100pps */ 394 395 static void 396 sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) 397 { 398 socklen_t slen; 399 400 if (slenp == NULL) 401 return; 402 403 slen = sockaddr_getlen(sa); 404 *slenp = (socklen_t)MIN(sizeof(struct in_addr), 405 slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); 406 } 407 408 const void * 409 sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) 410 { 411 const struct sockaddr_in *sin; 412 413 sockaddr_in_addrlen(sa, slenp); 414 sin = (const struct sockaddr_in *)sa; 415 return &sin->sin_addr; 416 } 417 418 void * 419 sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) 420 { 421 struct sockaddr_in *sin; 422 423 sockaddr_in_addrlen(sa, slenp); 424 sin = (struct sockaddr_in *)sa; 425 return &sin->sin_addr; 426 } 427 428 int 429 sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 430 { 431 uint_fast8_t len; 432 const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), 433 addrend = addrofs + sizeof(struct in_addr); 434 int rc; 435 const struct sockaddr_in *sin1, *sin2; 436 437 sin1 = satocsin(sa1); 438 sin2 = satocsin(sa2); 439 440 len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); 441 442 if (len > addrofs && 443 (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, 444 len - addrofs)) != 0) 445 return rc; 446 447 return sin1->sin_len - sin2->sin_len; 448 } 449
Indexes created Mon Oct 20 10:10:01 GMT 2025