in_proto.c revision 1.113
1 /* $NetBSD: in_proto.c,v 1.113 2015/08/24 22:21:26 pooka 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 1.113 2015/08/24 22:21:26 pooka Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_mrouting.h" 68 #include "opt_inet.h" 69 #include "opt_ipsec.h" 70 #include "opt_pim.h" 71 #include "opt_gateway.h" 72 #include "opt_dccp.h" 73 #include "opt_compat_netbsd.h" 74 #endif 75 76 #include <sys/param.h> 77 #include <sys/socket.h> 78 #include <sys/protosw.h> 79 #include <sys/domain.h> 80 #include <sys/mbuf.h> 81 82 #include <net/if.h> 83 #include <net/radix.h> 84 #include <net/route.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/in_var.h> 89 #include <netinet/ip.h> 90 #include <netinet/ip_var.h> 91 #include <netinet/ip_icmp.h> 92 #include <netinet/in_ifattach.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet/in_proto.h> 95 96 #ifdef INET6 97 #ifndef INET 98 #include <netinet/in.h> 99 #endif 100 #include <netinet/ip6.h> 101 #endif 102 103 #include <netinet/igmp_var.h> 104 #ifdef PIM 105 #include <netinet/pim_var.h> 106 #endif 107 #include <netinet/tcp.h> 108 #include <netinet/tcp_fsm.h> 109 #include <netinet/tcp_seq.h> 110 #include <netinet/tcp_timer.h> 111 #include <netinet/tcp_var.h> 112 #include <netinet/tcpip.h> 113 #include <netinet/tcp_debug.h> 114 #include <netinet/udp.h> 115 #include <netinet/udp_var.h> 116 #include <netinet/ip_encap.h> 117 118 #ifdef DCCP 119 #include <netinet/dccp.h> 120 #include <netinet/dccp_var.h> 121 #endif 122 123 /* 124 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 125 */ 126 127 #ifdef IPSEC 128 #include <netipsec/ipsec.h> 129 #include <netipsec/key.h> 130 #endif /* IPSEC */ 131 132 #include "carp.h" 133 #if NCARP > 0 134 #include <netinet/ip_carp.h> 135 #endif 136 137 #include "pfsync.h" 138 #if NPFSYNC > 0 139 #include <net/pfvar.h> 140 #include <net/if_pfsync.h> 141 #endif 142 143 #include "etherip.h" 144 #if NETHERIP > 0 145 #include <netinet/ip_etherip.h> 146 #endif 147 148 DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ 149 150 /* Wrappers to acquire kernel_lock. */ 151 152 PR_WRAP_CTLINPUT(rip_ctlinput) 153 PR_WRAP_CTLINPUT(udp_ctlinput) 154 PR_WRAP_CTLINPUT(tcp_ctlinput) 155 156 #define rip_ctlinput rip_ctlinput_wrapper 157 #define udp_ctlinput udp_ctlinput_wrapper 158 #define tcp_ctlinput tcp_ctlinput_wrapper 159 160 PR_WRAP_CTLOUTPUT(rip_ctloutput) 161 PR_WRAP_CTLOUTPUT(udp_ctloutput) 162 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 163 164 #define rip_ctloutput rip_ctloutput_wrapper 165 #define udp_ctloutput udp_ctloutput_wrapper 166 #define tcp_ctloutput tcp_ctloutput_wrapper 167 168 #ifdef DCCP 169 PR_WRAP_CTLINPUT(dccp_ctlinput) 170 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 171 172 #define dccp_ctlinput dccp_ctlinput_wrapper 173 #define dccp_ctloutput dccp_ctloutput_wrapper 174 #endif 175 176 #if defined(IPSEC) 177 PR_WRAP_CTLINPUT(ah4_ctlinput) 178 179 #define ah4_ctlinput ah4_ctlinput_wrapper 180 PR_WRAP_CTLINPUT(esp4_ctlinput) 181 182 #define esp4_ctlinput esp4_ctlinput_wrapper 183 #endif 184 185 const struct protosw inetsw[] = { 186 { .pr_domain = &inetdomain, 187 .pr_init = ip_init, 188 .pr_output = ip_output, 189 .pr_fasttimo = ip_fasttimo, 190 .pr_slowtimo = ip_slowtimo, 191 .pr_drain = ip_drainstub, 192 }, 193 { .pr_type = SOCK_DGRAM, 194 .pr_domain = &inetdomain, 195 .pr_protocol = IPPROTO_UDP, 196 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 197 .pr_input = udp_input, 198 .pr_ctlinput = udp_ctlinput, 199 .pr_ctloutput = udp_ctloutput, 200 .pr_usrreqs = &udp_usrreqs, 201 .pr_init = udp_init, 202 }, 203 { .pr_type = SOCK_STREAM, 204 .pr_domain = &inetdomain, 205 .pr_protocol = IPPROTO_TCP, 206 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 207 .pr_input = tcp_input, 208 .pr_ctlinput = tcp_ctlinput, 209 .pr_ctloutput = tcp_ctloutput, 210 .pr_usrreqs = &tcp_usrreqs, 211 .pr_init = tcp_init, 212 .pr_fasttimo = tcp_fasttimo, 213 .pr_drain = tcp_drainstub, 214 }, 215 #ifdef DCCP 216 { .pr_type = SOCK_CONN_DGRAM, 217 .pr_domain = &inetdomain, 218 .pr_protocol = IPPROTO_DCCP, 219 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_ATOMIC|PR_LISTEN|PR_ABRTACPTDIS, 220 .pr_input = dccp_input, 221 .pr_ctlinput = dccp_ctlinput, 222 .pr_ctloutput = dccp_ctloutput, 223 .pr_usrreqs = &dccp_usrreqs, 224 .pr_init = dccp_init, 225 }, 226 #endif 227 { .pr_type = SOCK_RAW, 228 .pr_domain = &inetdomain, 229 .pr_protocol = IPPROTO_RAW, 230 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 231 .pr_input = rip_input, 232 .pr_output = rip_output, 233 .pr_ctlinput = rip_ctlinput, 234 .pr_ctloutput = rip_ctloutput, 235 .pr_usrreqs = &rip_usrreqs, 236 }, 237 { .pr_type = SOCK_RAW, 238 .pr_domain = &inetdomain, 239 .pr_protocol = IPPROTO_ICMP, 240 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 241 .pr_input = icmp_input, 242 .pr_output = rip_output, 243 .pr_ctlinput = rip_ctlinput, 244 .pr_ctloutput = rip_ctloutput, 245 .pr_usrreqs = &rip_usrreqs, 246 .pr_init = icmp_init, 247 }, 248 #ifdef GATEWAY 249 { .pr_domain = &inetdomain, 250 .pr_protocol = IPPROTO_IP, 251 .pr_slowtimo = ipflow_slowtimo, 252 .pr_init = ipflow_poolinit, 253 }, 254 #endif /* GATEWAY */ 255 #ifdef IPSEC 256 { .pr_type = SOCK_RAW, 257 .pr_domain = &inetdomain, 258 .pr_protocol = IPPROTO_AH, 259 .pr_flags = PR_ATOMIC|PR_ADDR, 260 .pr_input = ipsec4_common_input, 261 .pr_ctlinput = ah4_ctlinput, 262 }, 263 { .pr_type = SOCK_RAW, 264 .pr_domain = &inetdomain, 265 .pr_protocol = IPPROTO_ESP, 266 .pr_flags = PR_ATOMIC|PR_ADDR, 267 .pr_input = ipsec4_common_input, 268 .pr_ctlinput = esp4_ctlinput, 269 }, 270 { .pr_type = SOCK_RAW, 271 .pr_domain = &inetdomain, 272 .pr_protocol = IPPROTO_IPCOMP, 273 .pr_flags = PR_ATOMIC|PR_ADDR, 274 .pr_input = ipsec4_common_input, 275 }, 276 #endif /* IPSEC */ 277 { .pr_type = SOCK_RAW, 278 .pr_domain = &inetdomain, 279 .pr_protocol = IPPROTO_IPV4, 280 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 281 .pr_input = encap4_input, 282 .pr_output = rip_output, 283 .pr_ctlinput = rip_ctlinput, 284 .pr_ctloutput = rip_ctloutput, 285 .pr_usrreqs = &rip_usrreqs, 286 .pr_init = encap_init, 287 }, 288 #ifdef INET6 289 { .pr_type = SOCK_RAW, 290 .pr_domain = &inetdomain, 291 .pr_protocol = IPPROTO_IPV6, 292 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 293 .pr_input = encap4_input, 294 .pr_output = rip_output, 295 .pr_ctlinput = rip_ctlinput, 296 .pr_ctloutput = rip_ctloutput, 297 .pr_usrreqs = &rip_usrreqs, 298 .pr_init = encap_init, 299 }, 300 #endif /* INET6 */ 301 #if NETHERIP > 0 302 { .pr_type = SOCK_RAW, 303 .pr_domain = &inetdomain, 304 .pr_protocol = IPPROTO_ETHERIP, 305 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 306 .pr_input = ip_etherip_input, 307 .pr_output = rip_output, 308 .pr_ctlinput = rip_ctlinput, 309 .pr_ctloutput = rip_ctloutput, 310 .pr_usrreqs = &rip_usrreqs, 311 }, 312 #endif /* NETHERIP > 0 */ 313 #if NCARP > 0 314 { .pr_type = SOCK_RAW, 315 .pr_domain = &inetdomain, 316 .pr_protocol = IPPROTO_CARP, 317 .pr_flags = PR_ATOMIC|PR_ADDR, 318 .pr_input = carp_proto_input, 319 .pr_output = rip_output, 320 .pr_ctloutput = rip_ctloutput, 321 .pr_usrreqs = &rip_usrreqs, 322 .pr_init = carp_init, 323 }, 324 #endif /* NCARP > 0 */ 325 #if NPFSYNC > 0 326 { .pr_type = SOCK_RAW, 327 .pr_domain = &inetdomain, 328 .pr_protocol = IPPROTO_PFSYNC, 329 .pr_flags = PR_ATOMIC|PR_ADDR, 330 .pr_input = pfsync_input, 331 .pr_output = rip_output, 332 .pr_ctloutput = rip_ctloutput, 333 .pr_usrreqs = &rip_usrreqs, 334 }, 335 #endif /* NPFSYNC > 0 */ 336 { .pr_type = SOCK_RAW, 337 .pr_domain = &inetdomain, 338 .pr_protocol = IPPROTO_IGMP, 339 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 340 .pr_input = igmp_input, 341 .pr_output = rip_output, 342 .pr_ctloutput = rip_ctloutput, 343 .pr_ctlinput = rip_ctlinput, 344 .pr_usrreqs = &rip_usrreqs, 345 .pr_fasttimo = igmp_fasttimo, 346 .pr_slowtimo = igmp_slowtimo, 347 .pr_init = igmp_init, 348 }, 349 #ifdef PIM 350 { .pr_type = SOCK_RAW, 351 .pr_domain = &inetdomain, 352 .pr_protocol = IPPROTO_PIM, 353 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 354 .pr_input = pim_input, 355 .pr_output = rip_output, 356 .pr_ctloutput = rip_ctloutput, 357 .pr_ctlinput = rip_ctlinput, 358 .pr_usrreqs = &rip_usrreqs, 359 }, 360 #endif /* PIM */ 361 /* raw wildcard */ 362 { .pr_type = SOCK_RAW, 363 .pr_domain = &inetdomain, 364 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 365 .pr_input = rip_input, 366 .pr_output = rip_output, 367 .pr_ctloutput = rip_ctloutput, 368 .pr_ctlinput = rip_ctlinput, 369 .pr_usrreqs = &rip_usrreqs, 370 .pr_init = rip_init, 371 }, 372 }; 373 374 const struct sockaddr_in in_any = { 375 .sin_len = sizeof(struct sockaddr_in) 376 , .sin_family = AF_INET 377 , .sin_port = 0 378 , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} 379 }; 380 381 struct domain inetdomain = { 382 .dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL, 383 .dom_externalize = NULL, .dom_dispose = NULL, 384 .dom_protosw = inetsw, 385 .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], 386 .dom_rtattach = rt_inithead, 387 .dom_rtoffset = 32, 388 .dom_maxrtkey = sizeof(struct ip_pack4), 389 .dom_if_up = in_if_up, 390 .dom_if_down = in_if_down, 391 #ifdef IPSELSRC 392 .dom_ifattach = in_domifattach, 393 .dom_ifdetach = in_domifdetach, 394 #else 395 .dom_ifattach = NULL, 396 .dom_ifdetach = NULL, 397 #endif 398 .dom_if_link_state_change = in_if_link_state_change, 399 .dom_ifqueues = { NULL, NULL }, 400 .dom_link = { NULL }, 401 .dom_mowner = MOWNER_INIT("",""), 402 .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), 403 .dom_sa_cmplen = sizeof(struct in_addr), 404 .dom_sa_any = (const struct sockaddr *)&in_any, 405 .dom_sockaddr_const_addr = sockaddr_in_const_addr, 406 .dom_sockaddr_addr = sockaddr_in_addr, 407 .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) 408 }; 409 410 u_char ip_protox[IPPROTO_MAX]; 411 412 int icmperrppslim = 100; /* 100pps */ 413 414 static void 415 sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) 416 { 417 socklen_t slen; 418 419 if (slenp == NULL) 420 return; 421 422 slen = sockaddr_getlen(sa); 423 *slenp = (socklen_t)MIN(sizeof(struct in_addr), 424 slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); 425 } 426 427 const void * 428 sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) 429 { 430 const struct sockaddr_in *sin; 431 432 sockaddr_in_addrlen(sa, slenp); 433 sin = (const struct sockaddr_in *)sa; 434 return &sin->sin_addr; 435 } 436 437 void * 438 sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) 439 { 440 struct sockaddr_in *sin; 441 442 sockaddr_in_addrlen(sa, slenp); 443 sin = (struct sockaddr_in *)sa; 444 return &sin->sin_addr; 445 } 446 447 int 448 sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 449 { 450 uint_fast8_t len; 451 const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), 452 addrend = addrofs + sizeof(struct in_addr); 453 int rc; 454 const struct sockaddr_in *sin1, *sin2; 455 456 sin1 = satocsin(sa1); 457 sin2 = satocsin(sa2); 458 459 len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); 460 461 if (len > addrofs && 462 (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, 463 len - addrofs)) != 0) 464 return rc; 465 466 return sin1->sin_len - sin2->sin_len; 467 } 468
Indexes created Wed Sep 24 15:09:51 GMT 2025