in6_proto.c revision 1.97
1 /* $NetBSD: in6_proto.c,v 1.97 2012/06/23 03:14:03 christos 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 1.97 2012/06/23 03:14:03 christos Exp $"); 66 67 #include "opt_gateway.h" 68 #include "opt_inet.h" 69 #include "opt_ipsec.h" 70 #include "opt_iso.h" 71 72 #include <sys/param.h> 73 #include <sys/socket.h> 74 #include <sys/protosw.h> 75 #include <sys/kernel.h> 76 #include <sys/domain.h> 77 #include <sys/mbuf.h> 78 79 #include <net/if.h> 80 #include <net/radix.h> 81 #include <net/route.h> 82 83 #include <netinet/in.h> 84 #include <netinet/in_systm.h> 85 #include <netinet/in_var.h> 86 #include <netinet/ip_encap.h> 87 #include <netinet/ip.h> 88 #include <netinet/ip_var.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/ip6.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet/icmp6.h> 93 #include <netinet6/in6_pcb.h> 94 95 #include <netinet/tcp.h> 96 #include <netinet/tcp_fsm.h> 97 #include <netinet/tcp_seq.h> 98 #include <netinet/tcp_timer.h> 99 #include <netinet/tcp_var.h> 100 #include <netinet/tcpip.h> 101 #include <netinet/tcp_debug.h> 102 103 #include <netinet6/udp6.h> 104 #include <netinet6/udp6_var.h> 105 106 #include <netinet6/pim6_var.h> 107 108 #include <netinet6/nd6.h> 109 110 #ifdef FAST_IPSEC 111 #include <netipsec/ipsec.h> 112 #include <netipsec/ipsec6.h> 113 #include <netipsec/key.h> 114 #endif /* FAST_IPSEC */ 115 116 117 #include "carp.h" 118 #if NCARP > 0 119 #include <netinet/ip_carp.h> 120 #endif 121 122 #include "etherip.h" 123 #if NETHERIP > 0 124 #include <netinet6/ip6_etherip.h> 125 #endif 126 127 #include <netinet6/ip6protosw.h> 128 129 #include <net/net_osdep.h> 130 131 /* 132 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 133 */ 134 135 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 136 137 /* Wrappers to acquire kernel_lock. */ 138 139 PR_WRAP_USRREQ(rip6_usrreq) 140 PR_WRAP_USRREQ(udp6_usrreq) 141 PR_WRAP_USRREQ(tcp_usrreq) 142 143 #define rip6_usrreq rip6_usrreq_wrapper 144 #define udp6_usrreq udp6_usrreq_wrapper 145 #define tcp_usrreq tcp_usrreq_wrapper 146 147 PR_WRAP_CTLINPUT(rip6_ctlinput) 148 PR_WRAP_CTLINPUT(encap6_ctlinput) 149 PR_WRAP_CTLINPUT(udp6_ctlinput) 150 PR_WRAP_CTLINPUT(tcp6_ctlinput) 151 152 #define rip6_ctlinput rip6_ctlinput_wrapper 153 #define encap6_ctlinput encap6_ctlinput_wrapper 154 #define udp6_ctlinput udp6_ctlinput_wrapper 155 #define tcp6_ctlinput tcp6_ctlinput_wrapper 156 157 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 158 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 159 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 160 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 161 162 #define rip6_ctloutput rip6_ctloutput_wrapper 163 #define tcp_ctloutput tcp_ctloutput_wrapper 164 #define udp6_ctloutput udp6_ctloutput_wrapper 165 #define icmp6_ctloutput icmp6_ctloutput_wrapper 166 167 #if defined(FAST_IPSEC) 168 PR_WRAP_CTLINPUT(ah6_ctlinput) 169 170 #define ah6_ctlinput ah6_ctlinput_wrapper 171 #endif 172 173 #if defined(FAST_IPSEC) 174 PR_WRAP_CTLINPUT(esp6_ctlinput) 175 176 #define esp6_ctlinput esp6_ctlinput_wrapper 177 #endif 178 179 const struct ip6protosw inet6sw[] = { 180 { .pr_domain = &inet6domain, 181 .pr_protocol = IPPROTO_IPV6, 182 .pr_init = ip6_init, 183 .pr_fasttimo = frag6_fasttimo, 184 .pr_slowtimo = frag6_slowtimo, 185 .pr_drain = frag6_drainstub, 186 }, 187 { .pr_type = SOCK_DGRAM, 188 .pr_domain = &inet6domain, 189 .pr_protocol = IPPROTO_UDP, 190 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 191 .pr_input = udp6_input, 192 .pr_ctlinput = udp6_ctlinput, 193 .pr_ctloutput = udp6_ctloutput, 194 .pr_usrreq = udp6_usrreq, 195 .pr_init = udp6_init, 196 }, 197 { .pr_type = SOCK_STREAM, 198 .pr_domain = &inet6domain, 199 .pr_protocol = IPPROTO_TCP, 200 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 201 .pr_input = tcp6_input, 202 .pr_ctlinput = tcp6_ctlinput, 203 .pr_ctloutput = tcp_ctloutput, 204 .pr_usrreq = tcp_usrreq, 205 #ifndef INET /* don't call initialization and timeout routines twice */ 206 .pr_init = tcp_init, 207 .pr_fasttimo = tcp_fasttimo, 208 .pr_slowtimo = tcp_slowtimo, 209 .pr_drain = tcp_drainstub, 210 #endif 211 }, 212 { .pr_type = SOCK_RAW, 213 .pr_domain = &inet6domain, 214 .pr_protocol = IPPROTO_RAW, 215 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 216 .pr_input = rip6_input, 217 .pr_output = rip6_output, 218 .pr_ctlinput = rip6_ctlinput, 219 .pr_ctloutput = rip6_ctloutput, 220 .pr_usrreq = rip6_usrreq, 221 }, 222 #ifdef GATEWAY 223 { .pr_domain = &inet6domain, 224 .pr_protocol = IPPROTO_IPV6, 225 .pr_slowtimo = ip6flow_slowtimo, 226 .pr_init = ip6flow_poolinit, 227 }, 228 #endif /* GATEWAY */ 229 { .pr_type = SOCK_RAW, 230 .pr_domain = &inet6domain, 231 .pr_protocol = IPPROTO_ICMPV6, 232 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 233 .pr_input = icmp6_input, 234 .pr_output = rip6_output, 235 .pr_ctlinput = rip6_ctlinput, 236 .pr_ctloutput = icmp6_ctloutput, 237 .pr_usrreq = rip6_usrreq, 238 .pr_init = icmp6_init, 239 }, 240 { .pr_type = SOCK_RAW, 241 .pr_domain = &inet6domain, 242 .pr_protocol = IPPROTO_DSTOPTS, 243 .pr_flags = PR_ATOMIC|PR_ADDR, 244 .pr_input = dest6_input, 245 }, 246 { .pr_type = SOCK_RAW, 247 .pr_domain = &inet6domain, 248 .pr_protocol = IPPROTO_ROUTING, 249 .pr_flags = PR_ATOMIC|PR_ADDR, 250 .pr_input = route6_input, 251 }, 252 { .pr_type = SOCK_RAW, 253 .pr_domain = &inet6domain, 254 .pr_protocol = IPPROTO_FRAGMENT, 255 .pr_flags = PR_ATOMIC|PR_ADDR, 256 .pr_input = frag6_input, 257 }, 258 #ifdef FAST_IPSEC 259 { .pr_type = SOCK_RAW, 260 .pr_domain = &inet6domain, 261 .pr_protocol = IPPROTO_AH, 262 .pr_flags = PR_ATOMIC|PR_ADDR, 263 .pr_input = ipsec6_common_input, 264 .pr_ctlinput = ah6_ctlinput, 265 }, 266 { .pr_type = SOCK_RAW, 267 .pr_domain = &inet6domain, 268 .pr_protocol = IPPROTO_ESP, 269 .pr_flags = PR_ATOMIC|PR_ADDR, 270 .pr_input = ipsec6_common_input, 271 .pr_ctlinput = esp6_ctlinput, 272 }, 273 { .pr_type = SOCK_RAW, 274 .pr_domain = &inet6domain, 275 .pr_protocol = IPPROTO_IPCOMP, 276 .pr_flags = PR_ATOMIC|PR_ADDR, 277 .pr_input = ipsec6_common_input, 278 }, 279 #endif /* FAST_IPSEC */ 280 #ifdef INET 281 { .pr_type = SOCK_RAW, 282 .pr_domain = &inet6domain, 283 .pr_protocol = IPPROTO_IPV4, 284 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 285 .pr_input = encap6_input, 286 .pr_output = rip6_output, 287 .pr_ctlinput = encap6_ctlinput, 288 .pr_ctloutput = rip6_ctloutput, 289 .pr_usrreq = rip6_usrreq, 290 .pr_init = encap_init, 291 }, 292 #endif 293 { .pr_type = SOCK_RAW, 294 .pr_domain = &inet6domain, 295 .pr_protocol = IPPROTO_IPV6, 296 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 297 .pr_input = encap6_input, 298 .pr_output = rip6_output, 299 .pr_ctlinput = encap6_ctlinput, 300 .pr_ctloutput = rip6_ctloutput, 301 .pr_usrreq = rip6_usrreq, 302 .pr_init = encap_init, 303 }, 304 #if NETHERIP > 0 305 { .pr_type = SOCK_RAW, 306 .pr_domain = &inet6domain, 307 .pr_protocol = IPPROTO_ETHERIP, 308 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 309 .pr_input = ip6_etherip_input, 310 .pr_output = rip6_output, 311 .pr_ctlinput = rip6_ctlinput, 312 .pr_ctloutput = rip6_ctloutput, 313 .pr_usrreq = rip6_usrreq, 314 }, 315 #endif 316 #if NCARP > 0 317 { .pr_type = SOCK_RAW, 318 .pr_domain = &inet6domain, 319 .pr_protocol = IPPROTO_CARP, 320 .pr_flags = PR_ATOMIC|PR_ADDR, 321 .pr_input = carp6_proto_input, 322 .pr_output = rip6_output, 323 .pr_ctloutput = rip6_ctloutput, 324 .pr_usrreq = rip6_usrreq, 325 }, 326 #endif /* NCARP */ 327 #ifdef ISO 328 { .pr_type = SOCK_RAW, 329 .pr_domain = &inet6domain, 330 .pr_protocol = IPPROTO_EON, 331 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 332 .pr_input = encap6_input, 333 .pr_output = rip6_output, 334 .pr_ctlinput = encap6_ctlinput, 335 .pr_ctloutput = rip6_ctloutput, 336 .pr_usrreq = rip6_usrreq, 337 /*XXX*/ 338 .pr_init = encap_init, 339 }, 340 #endif 341 { .pr_type = SOCK_RAW, 342 .pr_domain = &inet6domain, 343 .pr_protocol = IPPROTO_PIM, 344 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 345 .pr_input = pim6_input, 346 .pr_output = rip6_output, 347 .pr_ctloutput = rip6_ctloutput, 348 .pr_usrreq = rip6_usrreq, 349 .pr_init = pim6_init, 350 }, 351 /* raw wildcard */ 352 { .pr_type = SOCK_RAW, 353 .pr_domain = &inet6domain, 354 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 355 .pr_input = rip6_input, 356 .pr_output = rip6_output, 357 .pr_ctloutput = rip6_ctloutput, 358 .pr_usrreq = rip6_usrreq, 359 .pr_init = rip6_init, 360 }, 361 }; 362 363 static const struct sockaddr_in6 in6_any = { 364 .sin6_len = sizeof(in6_any) 365 , .sin6_family = AF_INET6 366 , .sin6_port = 0 367 , .sin6_flowinfo = 0 368 , .sin6_addr = IN6ADDR_ANY_INIT 369 , .sin6_scope_id = 0 370 }; 371 372 struct domain inet6domain = { 373 .dom_family = AF_INET6, .dom_name = "internet6", 374 .dom_init = NULL, .dom_externalize = NULL, .dom_dispose = NULL, 375 .dom_protosw = (const struct protosw *)inet6sw, 376 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 377 .dom_rtattach = rt_inithead, 378 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 379 .dom_maxrtkey = sizeof(struct ip_pack6), 380 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 381 .dom_ifqueues = { &ip6intrq, NULL }, 382 .dom_link = { NULL }, 383 .dom_mowner = MOWNER_INIT("",""), 384 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 385 .dom_sa_cmplen = sizeof(struct in6_addr), 386 .dom_sa_any = (const struct sockaddr *)&in6_any, 387 .dom_sockaddr_externalize = sockaddr_in6_externalize, 388 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 389 }; 390 391 #if 0 392 int 393 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 394 { 395 uint_fast8_t len; 396 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 397 addrend = addrofs + sizeof(struct in6_addr); 398 int rc; 399 const struct sockaddr_in6 *lsin6, *rsin6; 400 401 lsin6 = satocsin6(lsa); 402 rsin6 = satocsin6(rsa); 403 404 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 405 406 if (len > addrofs && 407 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 408 len - addrofs)) != 0) 409 return rc; 410 411 return lsin6->sin6_len - rsin6->sin6_len; 412 } 413 #endif 414 415 /* 416 * Internet configuration info 417 */ 418 #ifndef IPV6FORWARDING 419 #ifdef GATEWAY6 420 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 421 #else 422 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 423 #endif /* GATEWAY6 */ 424 #endif /* !IPV6FORWARDING */ 425 426 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 427 int ip6_sendredirects = 1; 428 int ip6_defhlim = IPV6_DEFHLIM; 429 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 430 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 431 int ip6_maxfragpackets = 200; 432 int ip6_maxfrags = 200; 433 int ip6_log_interval = 5; 434 int ip6_hdrnestlimit = 50; /* appropriate? */ 435 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 436 int ip6_auto_flowlabel = 1; 437 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 438 int ip6_rr_prune = 5; /* router renumbering prefix 439 * walk list every 5 sec. */ 440 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 441 int ip6_v6only = 1; 442 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 443 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 444 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 445 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 446 447 int ip6_keepfaith = 0; 448 time_t ip6_log_time = 0; 449 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 450 * routes via rtadv expected to be 451 * significantly larger than common use. 452 * if you need to count: 3 extra initial 453 * routes, plus 1 per interface after the 454 * first one, then one per non-linklocal 455 * prefix */ 456 457 /* icmp6 */ 458 /* 459 * BSDI4 defines these variables in in_proto.c... 460 * XXX: what if we don't define INET? Should we define pmtu6_expire 461 * or so? (jinmei (at) kame.net 19990310) 462 */ 463 int pmtu_expire = 60*10; 464 465 /* raw IP6 parameters */ 466 /* 467 * Nominal space allocated to a raw ip socket. 468 */ 469 #define RIPV6SNDQ 8192 470 #define RIPV6RCVQ 8192 471 472 u_long rip6_sendspace = RIPV6SNDQ; 473 u_long rip6_recvspace = RIPV6RCVQ; 474 475 /* ICMPV6 parameters */ 476 int icmp6_rediraccept = 1; /* accept and process redirects */ 477 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 478 int icmp6errppslim = 100; /* 100pps */ 479 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 480 481 /* UDP on IP6 parameters */ 482 int udp6_sendspace = 9216; /* really max datagram size */ 483 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 484 /* 40 1K datagrams */ 485
Indexes created Thu Sep 25 16:09:42 GMT 2025