in_proto.c revision 1.111
1 /* $NetBSD: in_proto.c,v 1.111 2015/02/10 19:11:52 rjs 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 1.111 2015/02/10 19:11:52 rjs 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 #include "opt_dccp.h" 72 #include "opt_compat_netbsd.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/in_var.h> 87 #include <netinet/ip.h> 88 #include <netinet/ip_var.h> 89 #include <netinet/ip_icmp.h> 90 #include <netinet/in_ifattach.h> 91 #include <netinet/in_pcb.h> 92 #include <netinet/in_proto.h> 93 94 #ifdef INET6 95 #ifndef INET 96 #include <netinet/in.h> 97 #endif 98 #include <netinet/ip6.h> 99 #endif 100 101 #include <netinet/igmp_var.h> 102 #ifdef PIM 103 #include <netinet/pim_var.h> 104 #endif 105 #include <netinet/tcp.h> 106 #include <netinet/tcp_fsm.h> 107 #include <netinet/tcp_seq.h> 108 #include <netinet/tcp_timer.h> 109 #include <netinet/tcp_var.h> 110 #include <netinet/tcpip.h> 111 #include <netinet/tcp_debug.h> 112 #include <netinet/udp.h> 113 #include <netinet/udp_var.h> 114 #include <netinet/ip_encap.h> 115 116 #ifdef DCCP 117 #include <netinet/dccp.h> 118 #include <netinet/dccp_var.h> 119 #endif 120 121 /* 122 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 123 */ 124 125 #ifdef IPSEC 126 #include <netipsec/ipsec.h> 127 #include <netipsec/key.h> 128 #endif /* IPSEC */ 129 130 #include "carp.h" 131 #if NCARP > 0 132 #include <netinet/ip_carp.h> 133 #endif 134 135 #include "pfsync.h" 136 #if NPFSYNC > 0 137 #include <net/pfvar.h> 138 #include <net/if_pfsync.h> 139 #endif 140 141 #include "etherip.h" 142 #if NETHERIP > 0 143 #include <netinet/ip_etherip.h> 144 #endif 145 146 DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ 147 148 /* Wrappers to acquire kernel_lock. */ 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 #ifdef DCCP 167 PR_WRAP_CTLINPUT(dccp_ctlinput) 168 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 169 170 #define dccp_ctlinput dccp_ctlinput_wrapper 171 #define dccp_ctloutput dccp_ctloutput_wrapper 172 #endif 173 174 #if defined(IPSEC) 175 PR_WRAP_CTLINPUT(ah4_ctlinput) 176 177 #define ah4_ctlinput ah4_ctlinput_wrapper 178 PR_WRAP_CTLINPUT(esp4_ctlinput) 179 180 #define esp4_ctlinput esp4_ctlinput_wrapper 181 #endif 182 183 const struct protosw inetsw[] = { 184 { .pr_domain = &inetdomain, 185 .pr_init = ip_init, 186 .pr_output = ip_output, 187 .pr_fasttimo = ip_fasttimo, 188 .pr_slowtimo = ip_slowtimo, 189 .pr_drain = ip_drainstub, 190 }, 191 { .pr_type = SOCK_DGRAM, 192 .pr_domain = &inetdomain, 193 .pr_protocol = IPPROTO_UDP, 194 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 195 .pr_input = udp_input, 196 .pr_ctlinput = udp_ctlinput, 197 .pr_ctloutput = udp_ctloutput, 198 .pr_usrreqs = &udp_usrreqs, 199 .pr_init = udp_init, 200 }, 201 { .pr_type = SOCK_STREAM, 202 .pr_domain = &inetdomain, 203 .pr_protocol = IPPROTO_TCP, 204 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 205 .pr_input = tcp_input, 206 .pr_ctlinput = tcp_ctlinput, 207 .pr_ctloutput = tcp_ctloutput, 208 .pr_usrreqs = &tcp_usrreqs, 209 .pr_init = tcp_init, 210 .pr_fasttimo = tcp_fasttimo, 211 .pr_drain = tcp_drainstub, 212 }, 213 #ifdef DCCP 214 { .pr_type = SOCK_CONN_DGRAM, 215 .pr_domain = &inetdomain, 216 .pr_protocol = IPPROTO_DCCP, 217 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_ATOMIC|PR_LISTEN|PR_ABRTACPTDIS, 218 .pr_input = dccp_input, 219 .pr_ctlinput = dccp_ctlinput, 220 .pr_ctloutput = dccp_ctloutput, 221 .pr_usrreqs = &dccp_usrreqs, 222 .pr_init = dccp_init, 223 }, 224 #endif 225 { .pr_type = SOCK_RAW, 226 .pr_domain = &inetdomain, 227 .pr_protocol = IPPROTO_RAW, 228 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 229 .pr_input = rip_input, 230 .pr_output = rip_output, 231 .pr_ctlinput = rip_ctlinput, 232 .pr_ctloutput = rip_ctloutput, 233 .pr_usrreqs = &rip_usrreqs, 234 }, 235 { .pr_type = SOCK_RAW, 236 .pr_domain = &inetdomain, 237 .pr_protocol = IPPROTO_ICMP, 238 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 239 .pr_input = icmp_input, 240 .pr_output = rip_output, 241 .pr_ctlinput = rip_ctlinput, 242 .pr_ctloutput = rip_ctloutput, 243 .pr_usrreqs = &rip_usrreqs, 244 .pr_init = icmp_init, 245 }, 246 #ifdef GATEWAY 247 { .pr_domain = &inetdomain, 248 .pr_protocol = IPPROTO_IP, 249 .pr_slowtimo = ipflow_slowtimo, 250 .pr_init = ipflow_poolinit, 251 }, 252 #endif /* GATEWAY */ 253 #ifdef IPSEC 254 { .pr_type = SOCK_RAW, 255 .pr_domain = &inetdomain, 256 .pr_protocol = IPPROTO_AH, 257 .pr_flags = PR_ATOMIC|PR_ADDR, 258 .pr_input = ipsec4_common_input, 259 .pr_ctlinput = ah4_ctlinput, 260 }, 261 { .pr_type = SOCK_RAW, 262 .pr_domain = &inetdomain, 263 .pr_protocol = IPPROTO_ESP, 264 .pr_flags = PR_ATOMIC|PR_ADDR, 265 .pr_input = ipsec4_common_input, 266 .pr_ctlinput = esp4_ctlinput, 267 }, 268 { .pr_type = SOCK_RAW, 269 .pr_domain = &inetdomain, 270 .pr_protocol = IPPROTO_IPCOMP, 271 .pr_flags = PR_ATOMIC|PR_ADDR, 272 .pr_input = ipsec4_common_input, 273 }, 274 #endif /* IPSEC */ 275 { .pr_type = SOCK_RAW, 276 .pr_domain = &inetdomain, 277 .pr_protocol = IPPROTO_IPV4, 278 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 279 .pr_input = encap4_input, 280 .pr_output = rip_output, 281 .pr_ctlinput = rip_ctlinput, 282 .pr_ctloutput = rip_ctloutput, 283 .pr_usrreqs = &rip_usrreqs, 284 .pr_init = encap_init, 285 }, 286 #ifdef INET6 287 { .pr_type = SOCK_RAW, 288 .pr_domain = &inetdomain, 289 .pr_protocol = IPPROTO_IPV6, 290 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 291 .pr_input = encap4_input, 292 .pr_output = rip_output, 293 .pr_ctlinput = rip_ctlinput, 294 .pr_ctloutput = rip_ctloutput, 295 .pr_usrreqs = &rip_usrreqs, 296 .pr_init = encap_init, 297 }, 298 #endif /* INET6 */ 299 #if NETHERIP > 0 300 { .pr_type = SOCK_RAW, 301 .pr_domain = &inetdomain, 302 .pr_protocol = IPPROTO_ETHERIP, 303 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 304 .pr_input = ip_etherip_input, 305 .pr_output = rip_output, 306 .pr_ctlinput = rip_ctlinput, 307 .pr_ctloutput = rip_ctloutput, 308 .pr_usrreqs = &rip_usrreqs, 309 }, 310 #endif /* NETHERIP > 0 */ 311 #if NCARP > 0 312 { .pr_type = SOCK_RAW, 313 .pr_domain = &inetdomain, 314 .pr_protocol = IPPROTO_CARP, 315 .pr_flags = PR_ATOMIC|PR_ADDR, 316 .pr_input = carp_proto_input, 317 .pr_output = rip_output, 318 .pr_ctloutput = rip_ctloutput, 319 .pr_usrreqs = &rip_usrreqs, 320 .pr_init = carp_init, 321 }, 322 #endif /* NCARP > 0 */ 323 #if NPFSYNC > 0 324 { .pr_type = SOCK_RAW, 325 .pr_domain = &inetdomain, 326 .pr_protocol = IPPROTO_PFSYNC, 327 .pr_flags = PR_ATOMIC|PR_ADDR, 328 .pr_input = pfsync_input, 329 .pr_output = rip_output, 330 .pr_ctloutput = rip_ctloutput, 331 .pr_usrreqs = &rip_usrreqs, 332 }, 333 #endif /* NPFSYNC > 0 */ 334 { .pr_type = SOCK_RAW, 335 .pr_domain = &inetdomain, 336 .pr_protocol = IPPROTO_IGMP, 337 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 338 .pr_input = igmp_input, 339 .pr_output = rip_output, 340 .pr_ctloutput = rip_ctloutput, 341 .pr_ctlinput = rip_ctlinput, 342 .pr_usrreqs = &rip_usrreqs, 343 .pr_fasttimo = igmp_fasttimo, 344 .pr_slowtimo = igmp_slowtimo, 345 .pr_init = igmp_init, 346 }, 347 #ifdef PIM 348 { .pr_type = SOCK_RAW, 349 .pr_domain = &inetdomain, 350 .pr_protocol = IPPROTO_PIM, 351 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 352 .pr_input = pim_input, 353 .pr_output = rip_output, 354 .pr_ctloutput = rip_ctloutput, 355 .pr_ctlinput = rip_ctlinput, 356 .pr_usrreqs = &rip_usrreqs, 357 }, 358 #endif /* PIM */ 359 /* raw wildcard */ 360 { .pr_type = SOCK_RAW, 361 .pr_domain = &inetdomain, 362 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 363 .pr_input = rip_input, 364 .pr_output = rip_output, 365 .pr_ctloutput = rip_ctloutput, 366 .pr_ctlinput = rip_ctlinput, 367 .pr_usrreqs = &rip_usrreqs, 368 .pr_init = rip_init, 369 }, 370 }; 371 372 const struct sockaddr_in in_any = { 373 .sin_len = sizeof(struct sockaddr_in) 374 , .sin_family = AF_INET 375 , .sin_port = 0 376 , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} 377 }; 378 379 struct domain inetdomain = { 380 .dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL, 381 .dom_externalize = NULL, .dom_dispose = NULL, 382 .dom_protosw = inetsw, 383 .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], 384 .dom_rtattach = rt_inithead, 385 .dom_rtoffset = 32, 386 .dom_maxrtkey = sizeof(struct ip_pack4), 387 #ifdef IPSELSRC 388 .dom_ifattach = in_domifattach, 389 .dom_ifdetach = in_domifdetach, 390 #else 391 .dom_ifattach = NULL, 392 .dom_ifdetach = NULL, 393 #endif 394 .dom_ifqueues = { NULL, NULL }, 395 .dom_link = { NULL }, 396 .dom_mowner = MOWNER_INIT("",""), 397 .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), 398 .dom_sa_cmplen = sizeof(struct in_addr), 399 .dom_sa_any = (const struct sockaddr *)&in_any, 400 .dom_sockaddr_const_addr = sockaddr_in_const_addr, 401 .dom_sockaddr_addr = sockaddr_in_addr, 402 .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) 403 }; 404 405 u_char ip_protox[IPPROTO_MAX]; 406 407 int icmperrppslim = 100; /* 100pps */ 408 409 static void 410 sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) 411 { 412 socklen_t slen; 413 414 if (slenp == NULL) 415 return; 416 417 slen = sockaddr_getlen(sa); 418 *slenp = (socklen_t)MIN(sizeof(struct in_addr), 419 slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); 420 } 421 422 const void * 423 sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) 424 { 425 const struct sockaddr_in *sin; 426 427 sockaddr_in_addrlen(sa, slenp); 428 sin = (const struct sockaddr_in *)sa; 429 return &sin->sin_addr; 430 } 431 432 void * 433 sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) 434 { 435 struct sockaddr_in *sin; 436 437 sockaddr_in_addrlen(sa, slenp); 438 sin = (struct sockaddr_in *)sa; 439 return &sin->sin_addr; 440 } 441 442 int 443 sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 444 { 445 uint_fast8_t len; 446 const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), 447 addrend = addrofs + sizeof(struct in_addr); 448 int rc; 449 const struct sockaddr_in *sin1, *sin2; 450 451 sin1 = satocsin(sa1); 452 sin2 = satocsin(sa2); 453 454 len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); 455 456 if (len > addrofs && 457 (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, 458 len - addrofs)) != 0) 459 return rc; 460 461 return sin1->sin_len - sin2->sin_len; 462 } 463
Indexes created Wed Sep 24 02:09:48 GMT 2025