in6_proto.c revision 1.84
1 /* $NetBSD: in6_proto.c,v 1.84 2009/03/23 18:43:20 liamjfoy 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 1.84 2009/03/23 18:43:20 liamjfoy 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 PR_WRAP_CTLINPUT(esp6_ctlinput) 182 183 #define ah6_ctlinput ah6_ctlinput_wrapper 184 #define esp6_ctlinput esp6_ctlinput_wrapper 185 #endif 186 187 const struct ip6protosw inet6sw[] = { 188 { .pr_domain = &inet6domain, 189 .pr_protocol = IPPROTO_IPV6, 190 .pr_init = ip6_init, 191 .pr_slowtimo = frag6_slowtimo, 192 .pr_drain = frag6_drain, 193 }, 194 { .pr_type = SOCK_DGRAM, 195 .pr_domain = &inet6domain, 196 .pr_protocol = IPPROTO_UDP, 197 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 198 .pr_input = udp6_input, 199 .pr_ctlinput = udp6_ctlinput, 200 .pr_ctloutput = ip6_ctloutput, 201 .pr_usrreq = udp6_usrreq, 202 .pr_init = udp6_init, 203 }, 204 { .pr_type = SOCK_STREAM, 205 .pr_domain = &inet6domain, 206 .pr_protocol = IPPROTO_TCP, 207 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 208 .pr_input = tcp6_input, 209 .pr_ctlinput = tcp6_ctlinput, 210 .pr_ctloutput = tcp_ctloutput, 211 .pr_usrreq = tcp_usrreq, 212 #ifndef INET /* don't call initialization and timeout routines twice */ 213 .pr_init = tcp_init, 214 .pr_slowtimo = tcp_slowtimo, 215 .pr_drain = tcp_drain, 216 #endif 217 }, 218 { .pr_type = SOCK_RAW, 219 .pr_domain = &inet6domain, 220 .pr_protocol = IPPROTO_RAW, 221 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 222 .pr_input = rip6_input, 223 .pr_output = rip6_output, 224 .pr_ctlinput = rip6_ctlinput, 225 .pr_ctloutput = rip6_ctloutput, 226 .pr_usrreq = rip6_usrreq, 227 }, 228 #ifdef GATEWAY 229 { .pr_domain = &inet6domain, 230 .pr_protocol = IPPROTO_IPV6, 231 .pr_slowtimo = ip6flow_slowtimo, 232 .pr_init = ip6flow_poolinit, 233 }, 234 #endif /* GATEWAY */ 235 { .pr_type = SOCK_RAW, 236 .pr_domain = &inet6domain, 237 .pr_protocol = IPPROTO_ICMPV6, 238 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 239 .pr_input = icmp6_input, 240 .pr_output = rip6_output, 241 .pr_ctlinput = rip6_ctlinput, 242 .pr_ctloutput = icmp6_ctloutput, 243 .pr_usrreq = rip6_usrreq, 244 .pr_init = icmp6_init, 245 }, 246 { .pr_type = SOCK_RAW, 247 .pr_domain = &inet6domain, 248 .pr_protocol = IPPROTO_DSTOPTS, 249 .pr_flags = PR_ATOMIC|PR_ADDR, 250 .pr_input = dest6_input, 251 }, 252 { .pr_type = SOCK_RAW, 253 .pr_domain = &inet6domain, 254 .pr_protocol = IPPROTO_ROUTING, 255 .pr_flags = PR_ATOMIC|PR_ADDR, 256 .pr_input = route6_input, 257 }, 258 { .pr_type = SOCK_RAW, 259 .pr_domain = &inet6domain, 260 .pr_protocol = IPPROTO_FRAGMENT, 261 .pr_flags = PR_ATOMIC|PR_ADDR, 262 .pr_input = frag6_input, 263 }, 264 #ifdef IPSEC 265 { .pr_type = SOCK_RAW, 266 .pr_domain = &inet6domain, 267 .pr_protocol = IPPROTO_AH, 268 .pr_flags = PR_ATOMIC|PR_ADDR, 269 .pr_input = ah6_input, 270 .pr_ctlinput = ah6_ctlinput, 271 .pr_init = ah6_init, 272 }, 273 #ifdef IPSEC_ESP 274 { .pr_type = SOCK_RAW, 275 .pr_domain = &inet6domain, 276 .pr_protocol = IPPROTO_ESP, 277 .pr_flags = PR_ATOMIC|PR_ADDR, 278 .pr_input = esp6_input, 279 .pr_ctlinput = esp6_ctlinput, 280 .pr_init = esp6_init, 281 }, 282 #endif 283 { .pr_type = SOCK_RAW, 284 .pr_domain = &inet6domain, 285 .pr_protocol = IPPROTO_IPCOMP, 286 .pr_flags = PR_ATOMIC|PR_ADDR, 287 .pr_input = ipcomp6_input, 288 .pr_init = ipcomp6_init, 289 }, 290 #endif /* IPSEC */ 291 #ifdef FAST_IPSEC 292 { .pr_type = SOCK_RAW, 293 .pr_domain = &inet6domain, 294 .pr_protocol = IPPROTO_AH, 295 .pr_flags = PR_ATOMIC|PR_ADDR, 296 .pr_input = ipsec6_common_input, 297 .pr_ctlinput = ah6_ctlinput, 298 }, 299 { .pr_type = SOCK_RAW, 300 .pr_domain = &inet6domain, 301 .pr_protocol = IPPROTO_ESP, 302 .pr_flags = PR_ATOMIC|PR_ADDR, 303 .pr_input = ipsec6_common_input, 304 .pr_ctlinput = esp6_ctlinput, 305 }, 306 { .pr_type = SOCK_RAW, 307 .pr_domain = &inet6domain, 308 .pr_protocol = IPPROTO_IPCOMP, 309 .pr_flags = PR_ATOMIC|PR_ADDR, 310 .pr_input = ipsec6_common_input, 311 }, 312 #endif /* FAST_IPSEC */ 313 #ifdef INET 314 { .pr_type = SOCK_RAW, 315 .pr_domain = &inet6domain, 316 .pr_protocol = IPPROTO_IPV4, 317 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 318 .pr_input = encap6_input, 319 .pr_output = rip6_output, 320 .pr_ctlinput = encap6_ctlinput, 321 .pr_ctloutput = rip6_ctloutput, 322 .pr_usrreq = rip6_usrreq, 323 .pr_init = encap_init, 324 }, 325 #endif 326 { .pr_type = SOCK_RAW, 327 .pr_domain = &inet6domain, 328 .pr_protocol = IPPROTO_IPV6, 329 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 330 .pr_input = encap6_input, 331 .pr_output = rip6_output, 332 .pr_ctlinput = encap6_ctlinput, 333 .pr_ctloutput = rip6_ctloutput, 334 .pr_usrreq = rip6_usrreq, 335 .pr_init = encap_init, 336 }, 337 #if NETHERIP > 1 338 { .pr_type = SOCK_RAW, 339 .pr_domain = &inet6domain, 340 .pr_protocol = IPPROTO_ETHERIP, 341 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 342 .pr_input = ip6_etherip_input, 343 .pr_output = rip6_output, 344 .pr_ctlinput = rip6_ctlinput, 345 .pr_ctloutput = rip6_ctloutput, 346 .pr_usrreq = rip6_usrreq, 347 }, 348 #endif 349 #if NCARP > 0 350 { .pr_type = SOCK_RAW, 351 .pr_domain = &inet6domain, 352 .pr_protocol = IPPROTO_CARP, 353 .pr_flags = PR_ATOMIC|PR_ADDR, 354 .pr_input = carp6_proto_input, 355 .pr_output = rip6_output, 356 .pr_ctloutput = rip6_ctloutput, 357 .pr_usrreq = rip6_usrreq, 358 }, 359 #endif /* NCARP */ 360 #ifdef ISO 361 { .pr_type = SOCK_RAW, 362 .pr_domain = &inet6domain, 363 .pr_protocol = IPPROTO_EON, 364 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 365 .pr_input = encap6_input, 366 .pr_output = rip6_output, 367 .pr_ctlinput = encap6_ctlinput, 368 .pr_ctloutput = rip6_ctloutput, 369 .pr_usrreq = rip6_usrreq, 370 /*XXX*/ 371 .pr_init = encap_init, 372 }, 373 #endif 374 { .pr_type = SOCK_RAW, 375 .pr_domain = &inet6domain, 376 .pr_protocol = IPPROTO_PIM, 377 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 378 .pr_input = pim6_input, 379 .pr_output = rip6_output, 380 .pr_ctloutput = rip6_ctloutput, 381 .pr_usrreq = rip6_usrreq, 382 .pr_init = pim6_init, 383 }, 384 /* raw wildcard */ 385 { .pr_type = SOCK_RAW, 386 .pr_domain = &inet6domain, 387 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 388 .pr_input = rip6_input, 389 .pr_output = rip6_output, 390 .pr_ctloutput = rip6_ctloutput, 391 .pr_usrreq = rip6_usrreq, 392 .pr_init = rip6_init, 393 }, 394 }; 395 396 static const struct sockaddr_in6 in6_any = { 397 .sin6_len = sizeof(in6_any) 398 , .sin6_family = AF_INET6 399 , .sin6_port = 0 400 , .sin6_flowinfo = 0 401 , .sin6_addr = IN6ADDR_ANY_INIT 402 , .sin6_scope_id = 0 403 }; 404 405 struct domain inet6domain = { 406 .dom_family = AF_INET6, .dom_name = "internet6", 407 .dom_init = NULL, .dom_externalize = NULL, .dom_dispose = NULL, 408 .dom_protosw = (const struct protosw *)inet6sw, 409 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 410 .dom_rtattach = rn_inithead, 411 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 412 .dom_maxrtkey = sizeof(struct ip_pack6), 413 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 414 .dom_ifqueues = { &ip6intrq, NULL }, 415 .dom_link = { NULL }, 416 .dom_mowner = MOWNER_INIT("",""), 417 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 418 .dom_sa_cmplen = sizeof(struct in6_addr), 419 .dom_sa_any = (const struct sockaddr *)&in6_any, 420 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 421 }; 422 423 int 424 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 425 { 426 uint_fast8_t len; 427 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 428 addrend = addrofs + sizeof(struct in6_addr); 429 int rc; 430 const struct sockaddr_in6 *lsin6, *rsin6; 431 432 lsin6 = satocsin6(lsa); 433 rsin6 = satocsin6(rsa); 434 435 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 436 437 if (len > addrofs && 438 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 439 len - addrofs)) != 0) 440 return rc; 441 442 return lsin6->sin6_len - rsin6->sin6_len; 443 } 444 445 /* 446 * Internet configuration info 447 */ 448 #ifndef IPV6FORWARDING 449 #ifdef GATEWAY6 450 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 451 #else 452 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 453 #endif /* GATEWAY6 */ 454 #endif /* !IPV6FORWARDING */ 455 456 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 457 int ip6_sendredirects = 1; 458 int ip6_defhlim = IPV6_DEFHLIM; 459 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 460 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 461 int ip6_maxfragpackets = 200; 462 int ip6_maxfrags = 200; 463 int ip6_log_interval = 5; 464 int ip6_hdrnestlimit = 50; /* appropriate? */ 465 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 466 int ip6_auto_flowlabel = 1; 467 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 468 int ip6_rr_prune = 5; /* router renumbering prefix 469 * walk list every 5 sec. */ 470 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 471 int ip6_v6only = 1; 472 473 int ip6_keepfaith = 0; 474 time_t ip6_log_time = (time_t)0L; 475 476 /* icmp6 */ 477 /* 478 * BSDI4 defines these variables in in_proto.c... 479 * XXX: what if we don't define INET? Should we define pmtu6_expire 480 * or so? (jinmei (at) kame.net 19990310) 481 */ 482 int pmtu_expire = 60*10; 483 484 /* raw IP6 parameters */ 485 /* 486 * Nominal space allocated to a raw ip socket. 487 */ 488 #define RIPV6SNDQ 8192 489 #define RIPV6RCVQ 8192 490 491 u_long rip6_sendspace = RIPV6SNDQ; 492 u_long rip6_recvspace = RIPV6RCVQ; 493 494 /* ICMPV6 parameters */ 495 int icmp6_rediraccept = 1; /* accept and process redirects */ 496 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 497 int icmp6errppslim = 100; /* 100pps */ 498 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 499 500 /* UDP on IP6 parameters */ 501 int udp6_sendspace = 9216; /* really max datagram size */ 502 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 503 /* 40 1K datagrams */ 504
Indexes created Thu Sep 25 16:09:42 GMT 2025