in6_proto.c revision 1.86
1 /* $NetBSD: in6_proto.c,v 1.86 2009/09/11 20:10:06 dyoung Exp $ */ 2 /* $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: in6_proto.c,v 1.86 2009/09/11 20:10:06 dyoung Exp $"); 66 67 #include "opt_inet.h" 68 #include "opt_ipsec.h" 69 #include "opt_iso.h" 70 71 #include <sys/param.h> 72 #include <sys/socket.h> 73 #include <sys/protosw.h> 74 #include <sys/kernel.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/in_var.h> 85 #include <netinet/ip_encap.h> 86 #include <netinet/ip.h> 87 #include <netinet/ip_var.h> 88 #include <netinet/in_pcb.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet/icmp6.h> 92 #include <netinet6/in6_pcb.h> 93 94 #include <netinet/tcp.h> 95 #include <netinet/tcp_fsm.h> 96 #include <netinet/tcp_seq.h> 97 #include <netinet/tcp_timer.h> 98 #include <netinet/tcp_var.h> 99 #include <netinet/tcpip.h> 100 #include <netinet/tcp_debug.h> 101 102 #include <netinet6/udp6.h> 103 #include <netinet6/udp6_var.h> 104 105 #include <netinet6/pim6_var.h> 106 107 #include <netinet6/nd6.h> 108 109 #ifdef IPSEC 110 #include <netinet6/ipsec.h> 111 #include <netinet6/ah.h> 112 #ifdef IPSEC_ESP 113 #include <netinet6/esp.h> 114 #endif 115 #include <netinet6/ipcomp.h> 116 #endif /* IPSEC */ 117 118 #ifdef FAST_IPSEC 119 #include <netipsec/ipsec.h> 120 #include <netipsec/ipsec6.h> 121 #include <netipsec/key.h> 122 #endif /* FAST_IPSEC */ 123 124 125 #include "carp.h" 126 #if NCARP > 0 127 #include <netinet/ip_carp.h> 128 #endif 129 130 #include "etherip.h" 131 #if NETHERIP > 1 132 #include <netinet6/ip6_etherip.h> 133 #endif 134 135 #include <netinet6/ip6protosw.h> 136 137 #include <net/net_osdep.h> 138 139 #ifndef offsetof /* XXX */ 140 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 141 #endif 142 143 /* 144 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 145 */ 146 147 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 148 149 /* Wrappers to acquire kernel_lock. */ 150 151 PR_WRAP_USRREQ(rip6_usrreq) 152 PR_WRAP_USRREQ(udp6_usrreq) 153 PR_WRAP_USRREQ(tcp_usrreq) 154 155 #define rip6_usrreq rip6_usrreq_wrapper 156 #define udp6_usrreq udp6_usrreq_wrapper 157 #define tcp_usrreq tcp_usrreq_wrapper 158 159 PR_WRAP_CTLINPUT(rip6_ctlinput) 160 PR_WRAP_CTLINPUT(encap6_ctlinput) 161 PR_WRAP_CTLINPUT(udp6_ctlinput) 162 PR_WRAP_CTLINPUT(tcp6_ctlinput) 163 164 #define rip6_ctlinput rip6_ctlinput_wrapper 165 #define encap6_ctlinput encap6_ctlinput_wrapper 166 #define udp6_ctlinput udp6_ctlinput_wrapper 167 #define tcp6_ctlinput tcp6_ctlinput_wrapper 168 169 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 170 PR_WRAP_CTLOUTPUT(ip6_ctloutput) 171 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 172 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 173 174 #define rip6_ctloutput rip6_ctloutput_wrapper 175 #define ip6_ctloutput ip6_ctloutput_wrapper 176 #define tcp_ctloutput tcp_ctloutput_wrapper 177 #define icmp6_ctloutput icmp6_ctloutput_wrapper 178 179 #if defined(IPSEC) || defined(FAST_IPSEC) 180 PR_WRAP_CTLINPUT(ah6_ctlinput) 181 182 #define ah6_ctlinput ah6_ctlinput_wrapper 183 #endif 184 185 #if (defined(IPSEC) && defined(IPSEC_ESP)) || defined(FAST_IPSEC) 186 PR_WRAP_CTLINPUT(esp6_ctlinput) 187 188 #define esp6_ctlinput esp6_ctlinput_wrapper 189 #endif 190 191 const struct ip6protosw inet6sw[] = { 192 { .pr_domain = &inet6domain, 193 .pr_protocol = IPPROTO_IPV6, 194 .pr_init = ip6_init, 195 .pr_slowtimo = frag6_slowtimo, 196 .pr_drain = frag6_drain, 197 }, 198 { .pr_type = SOCK_DGRAM, 199 .pr_domain = &inet6domain, 200 .pr_protocol = IPPROTO_UDP, 201 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 202 .pr_input = udp6_input, 203 .pr_ctlinput = udp6_ctlinput, 204 .pr_ctloutput = ip6_ctloutput, 205 .pr_usrreq = udp6_usrreq, 206 .pr_init = udp6_init, 207 }, 208 { .pr_type = SOCK_STREAM, 209 .pr_domain = &inet6domain, 210 .pr_protocol = IPPROTO_TCP, 211 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 212 .pr_input = tcp6_input, 213 .pr_ctlinput = tcp6_ctlinput, 214 .pr_ctloutput = tcp_ctloutput, 215 .pr_usrreq = tcp_usrreq, 216 #ifndef INET /* don't call initialization and timeout routines twice */ 217 .pr_init = tcp_init, 218 .pr_slowtimo = tcp_slowtimo, 219 .pr_drain = tcp_drain, 220 #endif 221 }, 222 { .pr_type = SOCK_RAW, 223 .pr_domain = &inet6domain, 224 .pr_protocol = IPPROTO_RAW, 225 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 226 .pr_input = rip6_input, 227 .pr_output = rip6_output, 228 .pr_ctlinput = rip6_ctlinput, 229 .pr_ctloutput = rip6_ctloutput, 230 .pr_usrreq = rip6_usrreq, 231 }, 232 #ifdef GATEWAY 233 { .pr_domain = &inet6domain, 234 .pr_protocol = IPPROTO_IPV6, 235 .pr_slowtimo = ip6flow_slowtimo, 236 .pr_init = ip6flow_poolinit, 237 }, 238 #endif /* GATEWAY */ 239 { .pr_type = SOCK_RAW, 240 .pr_domain = &inet6domain, 241 .pr_protocol = IPPROTO_ICMPV6, 242 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 243 .pr_input = icmp6_input, 244 .pr_output = rip6_output, 245 .pr_ctlinput = rip6_ctlinput, 246 .pr_ctloutput = icmp6_ctloutput, 247 .pr_usrreq = rip6_usrreq, 248 .pr_init = icmp6_init, 249 }, 250 { .pr_type = SOCK_RAW, 251 .pr_domain = &inet6domain, 252 .pr_protocol = IPPROTO_DSTOPTS, 253 .pr_flags = PR_ATOMIC|PR_ADDR, 254 .pr_input = dest6_input, 255 }, 256 { .pr_type = SOCK_RAW, 257 .pr_domain = &inet6domain, 258 .pr_protocol = IPPROTO_ROUTING, 259 .pr_flags = PR_ATOMIC|PR_ADDR, 260 .pr_input = route6_input, 261 }, 262 { .pr_type = SOCK_RAW, 263 .pr_domain = &inet6domain, 264 .pr_protocol = IPPROTO_FRAGMENT, 265 .pr_flags = PR_ATOMIC|PR_ADDR, 266 .pr_input = frag6_input, 267 }, 268 #ifdef IPSEC 269 { .pr_type = SOCK_RAW, 270 .pr_domain = &inet6domain, 271 .pr_protocol = IPPROTO_AH, 272 .pr_flags = PR_ATOMIC|PR_ADDR, 273 .pr_input = ah6_input, 274 .pr_ctlinput = ah6_ctlinput, 275 .pr_init = ah6_init, 276 }, 277 #ifdef IPSEC_ESP 278 { .pr_type = SOCK_RAW, 279 .pr_domain = &inet6domain, 280 .pr_protocol = IPPROTO_ESP, 281 .pr_flags = PR_ATOMIC|PR_ADDR, 282 .pr_input = esp6_input, 283 .pr_ctlinput = esp6_ctlinput, 284 .pr_init = esp6_init, 285 }, 286 #endif 287 { .pr_type = SOCK_RAW, 288 .pr_domain = &inet6domain, 289 .pr_protocol = IPPROTO_IPCOMP, 290 .pr_flags = PR_ATOMIC|PR_ADDR, 291 .pr_input = ipcomp6_input, 292 .pr_init = ipcomp6_init, 293 }, 294 #endif /* IPSEC */ 295 #ifdef FAST_IPSEC 296 { .pr_type = SOCK_RAW, 297 .pr_domain = &inet6domain, 298 .pr_protocol = IPPROTO_AH, 299 .pr_flags = PR_ATOMIC|PR_ADDR, 300 .pr_input = ipsec6_common_input, 301 .pr_ctlinput = ah6_ctlinput, 302 }, 303 { .pr_type = SOCK_RAW, 304 .pr_domain = &inet6domain, 305 .pr_protocol = IPPROTO_ESP, 306 .pr_flags = PR_ATOMIC|PR_ADDR, 307 .pr_input = ipsec6_common_input, 308 .pr_ctlinput = esp6_ctlinput, 309 }, 310 { .pr_type = SOCK_RAW, 311 .pr_domain = &inet6domain, 312 .pr_protocol = IPPROTO_IPCOMP, 313 .pr_flags = PR_ATOMIC|PR_ADDR, 314 .pr_input = ipsec6_common_input, 315 }, 316 #endif /* FAST_IPSEC */ 317 #ifdef INET 318 { .pr_type = SOCK_RAW, 319 .pr_domain = &inet6domain, 320 .pr_protocol = IPPROTO_IPV4, 321 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 322 .pr_input = encap6_input, 323 .pr_output = rip6_output, 324 .pr_ctlinput = encap6_ctlinput, 325 .pr_ctloutput = rip6_ctloutput, 326 .pr_usrreq = rip6_usrreq, 327 .pr_init = encap_init, 328 }, 329 #endif 330 { .pr_type = SOCK_RAW, 331 .pr_domain = &inet6domain, 332 .pr_protocol = IPPROTO_IPV6, 333 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 334 .pr_input = encap6_input, 335 .pr_output = rip6_output, 336 .pr_ctlinput = encap6_ctlinput, 337 .pr_ctloutput = rip6_ctloutput, 338 .pr_usrreq = rip6_usrreq, 339 .pr_init = encap_init, 340 }, 341 #if NETHERIP > 1 342 { .pr_type = SOCK_RAW, 343 .pr_domain = &inet6domain, 344 .pr_protocol = IPPROTO_ETHERIP, 345 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 346 .pr_input = ip6_etherip_input, 347 .pr_output = rip6_output, 348 .pr_ctlinput = rip6_ctlinput, 349 .pr_ctloutput = rip6_ctloutput, 350 .pr_usrreq = rip6_usrreq, 351 }, 352 #endif 353 #if NCARP > 0 354 { .pr_type = SOCK_RAW, 355 .pr_domain = &inet6domain, 356 .pr_protocol = IPPROTO_CARP, 357 .pr_flags = PR_ATOMIC|PR_ADDR, 358 .pr_input = carp6_proto_input, 359 .pr_output = rip6_output, 360 .pr_ctloutput = rip6_ctloutput, 361 .pr_usrreq = rip6_usrreq, 362 }, 363 #endif /* NCARP */ 364 #ifdef ISO 365 { .pr_type = SOCK_RAW, 366 .pr_domain = &inet6domain, 367 .pr_protocol = IPPROTO_EON, 368 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 369 .pr_input = encap6_input, 370 .pr_output = rip6_output, 371 .pr_ctlinput = encap6_ctlinput, 372 .pr_ctloutput = rip6_ctloutput, 373 .pr_usrreq = rip6_usrreq, 374 /*XXX*/ 375 .pr_init = encap_init, 376 }, 377 #endif 378 { .pr_type = SOCK_RAW, 379 .pr_domain = &inet6domain, 380 .pr_protocol = IPPROTO_PIM, 381 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 382 .pr_input = pim6_input, 383 .pr_output = rip6_output, 384 .pr_ctloutput = rip6_ctloutput, 385 .pr_usrreq = rip6_usrreq, 386 .pr_init = pim6_init, 387 }, 388 /* raw wildcard */ 389 { .pr_type = SOCK_RAW, 390 .pr_domain = &inet6domain, 391 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 392 .pr_input = rip6_input, 393 .pr_output = rip6_output, 394 .pr_ctloutput = rip6_ctloutput, 395 .pr_usrreq = rip6_usrreq, 396 .pr_init = rip6_init, 397 }, 398 }; 399 400 static const struct sockaddr_in6 in6_any = { 401 .sin6_len = sizeof(in6_any) 402 , .sin6_family = AF_INET6 403 , .sin6_port = 0 404 , .sin6_flowinfo = 0 405 , .sin6_addr = IN6ADDR_ANY_INIT 406 , .sin6_scope_id = 0 407 }; 408 409 struct domain inet6domain = { 410 .dom_family = AF_INET6, .dom_name = "internet6", 411 .dom_init = NULL, .dom_externalize = NULL, .dom_dispose = NULL, 412 .dom_protosw = (const struct protosw *)inet6sw, 413 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 414 .dom_rtattach = rn_inithead, 415 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 416 .dom_maxrtkey = sizeof(struct ip_pack6), 417 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 418 .dom_ifqueues = { &ip6intrq, NULL }, 419 .dom_link = { NULL }, 420 .dom_mowner = MOWNER_INIT("",""), 421 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 422 .dom_sa_cmplen = sizeof(struct in6_addr), 423 .dom_sa_any = (const struct sockaddr *)&in6_any, 424 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 425 }; 426 427 #if 0 428 int 429 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 430 { 431 uint_fast8_t len; 432 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 433 addrend = addrofs + sizeof(struct in6_addr); 434 int rc; 435 const struct sockaddr_in6 *lsin6, *rsin6; 436 437 lsin6 = satocsin6(lsa); 438 rsin6 = satocsin6(rsa); 439 440 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 441 442 if (len > addrofs && 443 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 444 len - addrofs)) != 0) 445 return rc; 446 447 return lsin6->sin6_len - rsin6->sin6_len; 448 } 449 #endif 450 451 /* 452 * Internet configuration info 453 */ 454 #ifndef IPV6FORWARDING 455 #ifdef GATEWAY6 456 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 457 #else 458 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 459 #endif /* GATEWAY6 */ 460 #endif /* !IPV6FORWARDING */ 461 462 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 463 int ip6_sendredirects = 1; 464 int ip6_defhlim = IPV6_DEFHLIM; 465 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 466 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 467 int ip6_maxfragpackets = 200; 468 int ip6_maxfrags = 200; 469 int ip6_log_interval = 5; 470 int ip6_hdrnestlimit = 50; /* appropriate? */ 471 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 472 int ip6_auto_flowlabel = 1; 473 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 474 int ip6_rr_prune = 5; /* router renumbering prefix 475 * walk list every 5 sec. */ 476 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 477 int ip6_v6only = 1; 478 479 int ip6_keepfaith = 0; 480 time_t ip6_log_time = (time_t)0L; 481 482 /* icmp6 */ 483 /* 484 * BSDI4 defines these variables in in_proto.c... 485 * XXX: what if we don't define INET? Should we define pmtu6_expire 486 * or so? (jinmei (at) kame.net 19990310) 487 */ 488 int pmtu_expire = 60*10; 489 490 /* raw IP6 parameters */ 491 /* 492 * Nominal space allocated to a raw ip socket. 493 */ 494 #define RIPV6SNDQ 8192 495 #define RIPV6RCVQ 8192 496 497 u_long rip6_sendspace = RIPV6SNDQ; 498 u_long rip6_recvspace = RIPV6RCVQ; 499 500 /* ICMPV6 parameters */ 501 int icmp6_rediraccept = 1; /* accept and process redirects */ 502 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 503 int icmp6errppslim = 100; /* 100pps */ 504 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 505 506 /* UDP on IP6 parameters */ 507 int udp6_sendspace = 9216; /* really max datagram size */ 508 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 509 /* 40 1K datagrams */ 510
Indexes created Wed Sep 24 15:09:51 GMT 2025