in6_proto.c revision 1.98
1 /* $NetBSD: in6_proto.c,v 1.98 2013/03/01 18:25:58 joerg 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 1.98 2013/03/01 18:25:58 joerg Exp $"); 66 67 #include "opt_gateway.h" 68 #include "opt_inet.h" 69 #include "opt_ipsec.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 FAST_IPSEC 110 #include <netipsec/ipsec.h> 111 #include <netipsec/ipsec6.h> 112 #include <netipsec/key.h> 113 #endif /* FAST_IPSEC */ 114 115 116 #include "carp.h" 117 #if NCARP > 0 118 #include <netinet/ip_carp.h> 119 #endif 120 121 #include "etherip.h" 122 #if NETHERIP > 0 123 #include <netinet6/ip6_etherip.h> 124 #endif 125 126 #include <netinet6/ip6protosw.h> 127 128 #include <net/net_osdep.h> 129 130 /* 131 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 132 */ 133 134 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 135 136 /* Wrappers to acquire kernel_lock. */ 137 138 PR_WRAP_USRREQ(rip6_usrreq) 139 PR_WRAP_USRREQ(udp6_usrreq) 140 PR_WRAP_USRREQ(tcp_usrreq) 141 142 #define rip6_usrreq rip6_usrreq_wrapper 143 #define udp6_usrreq udp6_usrreq_wrapper 144 #define tcp_usrreq tcp_usrreq_wrapper 145 146 PR_WRAP_CTLINPUT(rip6_ctlinput) 147 PR_WRAP_CTLINPUT(encap6_ctlinput) 148 PR_WRAP_CTLINPUT(udp6_ctlinput) 149 PR_WRAP_CTLINPUT(tcp6_ctlinput) 150 151 #define rip6_ctlinput rip6_ctlinput_wrapper 152 #define encap6_ctlinput encap6_ctlinput_wrapper 153 #define udp6_ctlinput udp6_ctlinput_wrapper 154 #define tcp6_ctlinput tcp6_ctlinput_wrapper 155 156 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 157 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 158 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 159 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 160 161 #define rip6_ctloutput rip6_ctloutput_wrapper 162 #define tcp_ctloutput tcp_ctloutput_wrapper 163 #define udp6_ctloutput udp6_ctloutput_wrapper 164 #define icmp6_ctloutput icmp6_ctloutput_wrapper 165 166 #if defined(FAST_IPSEC) 167 PR_WRAP_CTLINPUT(ah6_ctlinput) 168 169 #define ah6_ctlinput ah6_ctlinput_wrapper 170 #endif 171 172 #if defined(FAST_IPSEC) 173 PR_WRAP_CTLINPUT(esp6_ctlinput) 174 175 #define esp6_ctlinput esp6_ctlinput_wrapper 176 #endif 177 178 const struct ip6protosw inet6sw[] = { 179 { .pr_domain = &inet6domain, 180 .pr_protocol = IPPROTO_IPV6, 181 .pr_init = ip6_init, 182 .pr_fasttimo = frag6_fasttimo, 183 .pr_slowtimo = frag6_slowtimo, 184 .pr_drain = frag6_drainstub, 185 }, 186 { .pr_type = SOCK_DGRAM, 187 .pr_domain = &inet6domain, 188 .pr_protocol = IPPROTO_UDP, 189 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 190 .pr_input = udp6_input, 191 .pr_ctlinput = udp6_ctlinput, 192 .pr_ctloutput = udp6_ctloutput, 193 .pr_usrreq = udp6_usrreq, 194 .pr_init = udp6_init, 195 }, 196 { .pr_type = SOCK_STREAM, 197 .pr_domain = &inet6domain, 198 .pr_protocol = IPPROTO_TCP, 199 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 200 .pr_input = tcp6_input, 201 .pr_ctlinput = tcp6_ctlinput, 202 .pr_ctloutput = tcp_ctloutput, 203 .pr_usrreq = tcp_usrreq, 204 #ifndef INET /* don't call initialization and timeout routines twice */ 205 .pr_init = tcp_init, 206 .pr_fasttimo = tcp_fasttimo, 207 .pr_slowtimo = tcp_slowtimo, 208 .pr_drain = tcp_drainstub, 209 #endif 210 }, 211 { .pr_type = SOCK_RAW, 212 .pr_domain = &inet6domain, 213 .pr_protocol = IPPROTO_RAW, 214 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 215 .pr_input = rip6_input, 216 .pr_output = rip6_output, 217 .pr_ctlinput = rip6_ctlinput, 218 .pr_ctloutput = rip6_ctloutput, 219 .pr_usrreq = rip6_usrreq, 220 }, 221 #ifdef GATEWAY 222 { .pr_domain = &inet6domain, 223 .pr_protocol = IPPROTO_IPV6, 224 .pr_slowtimo = ip6flow_slowtimo, 225 .pr_init = ip6flow_poolinit, 226 }, 227 #endif /* GATEWAY */ 228 { .pr_type = SOCK_RAW, 229 .pr_domain = &inet6domain, 230 .pr_protocol = IPPROTO_ICMPV6, 231 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 232 .pr_input = icmp6_input, 233 .pr_output = rip6_output, 234 .pr_ctlinput = rip6_ctlinput, 235 .pr_ctloutput = icmp6_ctloutput, 236 .pr_usrreq = rip6_usrreq, 237 .pr_init = icmp6_init, 238 }, 239 { .pr_type = SOCK_RAW, 240 .pr_domain = &inet6domain, 241 .pr_protocol = IPPROTO_DSTOPTS, 242 .pr_flags = PR_ATOMIC|PR_ADDR, 243 .pr_input = dest6_input, 244 }, 245 { .pr_type = SOCK_RAW, 246 .pr_domain = &inet6domain, 247 .pr_protocol = IPPROTO_ROUTING, 248 .pr_flags = PR_ATOMIC|PR_ADDR, 249 .pr_input = route6_input, 250 }, 251 { .pr_type = SOCK_RAW, 252 .pr_domain = &inet6domain, 253 .pr_protocol = IPPROTO_FRAGMENT, 254 .pr_flags = PR_ATOMIC|PR_ADDR, 255 .pr_input = frag6_input, 256 }, 257 #ifdef FAST_IPSEC 258 { .pr_type = SOCK_RAW, 259 .pr_domain = &inet6domain, 260 .pr_protocol = IPPROTO_AH, 261 .pr_flags = PR_ATOMIC|PR_ADDR, 262 .pr_input = ipsec6_common_input, 263 .pr_ctlinput = ah6_ctlinput, 264 }, 265 { .pr_type = SOCK_RAW, 266 .pr_domain = &inet6domain, 267 .pr_protocol = IPPROTO_ESP, 268 .pr_flags = PR_ATOMIC|PR_ADDR, 269 .pr_input = ipsec6_common_input, 270 .pr_ctlinput = esp6_ctlinput, 271 }, 272 { .pr_type = SOCK_RAW, 273 .pr_domain = &inet6domain, 274 .pr_protocol = IPPROTO_IPCOMP, 275 .pr_flags = PR_ATOMIC|PR_ADDR, 276 .pr_input = ipsec6_common_input, 277 }, 278 #endif /* FAST_IPSEC */ 279 #ifdef INET 280 { .pr_type = SOCK_RAW, 281 .pr_domain = &inet6domain, 282 .pr_protocol = IPPROTO_IPV4, 283 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 284 .pr_input = encap6_input, 285 .pr_output = rip6_output, 286 .pr_ctlinput = encap6_ctlinput, 287 .pr_ctloutput = rip6_ctloutput, 288 .pr_usrreq = rip6_usrreq, 289 .pr_init = encap_init, 290 }, 291 #endif 292 { .pr_type = SOCK_RAW, 293 .pr_domain = &inet6domain, 294 .pr_protocol = IPPROTO_IPV6, 295 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 296 .pr_input = encap6_input, 297 .pr_output = rip6_output, 298 .pr_ctlinput = encap6_ctlinput, 299 .pr_ctloutput = rip6_ctloutput, 300 .pr_usrreq = rip6_usrreq, 301 .pr_init = encap_init, 302 }, 303 #if NETHERIP > 0 304 { .pr_type = SOCK_RAW, 305 .pr_domain = &inet6domain, 306 .pr_protocol = IPPROTO_ETHERIP, 307 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 308 .pr_input = ip6_etherip_input, 309 .pr_output = rip6_output, 310 .pr_ctlinput = rip6_ctlinput, 311 .pr_ctloutput = rip6_ctloutput, 312 .pr_usrreq = rip6_usrreq, 313 }, 314 #endif 315 #if NCARP > 0 316 { .pr_type = SOCK_RAW, 317 .pr_domain = &inet6domain, 318 .pr_protocol = IPPROTO_CARP, 319 .pr_flags = PR_ATOMIC|PR_ADDR, 320 .pr_input = carp6_proto_input, 321 .pr_output = rip6_output, 322 .pr_ctloutput = rip6_ctloutput, 323 .pr_usrreq = rip6_usrreq, 324 }, 325 #endif /* NCARP */ 326 { .pr_type = SOCK_RAW, 327 .pr_domain = &inet6domain, 328 .pr_protocol = IPPROTO_PIM, 329 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 330 .pr_input = pim6_input, 331 .pr_output = rip6_output, 332 .pr_ctloutput = rip6_ctloutput, 333 .pr_usrreq = rip6_usrreq, 334 .pr_init = pim6_init, 335 }, 336 /* raw wildcard */ 337 { .pr_type = SOCK_RAW, 338 .pr_domain = &inet6domain, 339 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 340 .pr_input = rip6_input, 341 .pr_output = rip6_output, 342 .pr_ctloutput = rip6_ctloutput, 343 .pr_usrreq = rip6_usrreq, 344 .pr_init = rip6_init, 345 }, 346 }; 347 348 static const struct sockaddr_in6 in6_any = { 349 .sin6_len = sizeof(in6_any) 350 , .sin6_family = AF_INET6 351 , .sin6_port = 0 352 , .sin6_flowinfo = 0 353 , .sin6_addr = IN6ADDR_ANY_INIT 354 , .sin6_scope_id = 0 355 }; 356 357 struct domain inet6domain = { 358 .dom_family = AF_INET6, .dom_name = "internet6", 359 .dom_init = NULL, .dom_externalize = NULL, .dom_dispose = NULL, 360 .dom_protosw = (const struct protosw *)inet6sw, 361 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 362 .dom_rtattach = rt_inithead, 363 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 364 .dom_maxrtkey = sizeof(struct ip_pack6), 365 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 366 .dom_ifqueues = { &ip6intrq, NULL }, 367 .dom_link = { NULL }, 368 .dom_mowner = MOWNER_INIT("",""), 369 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 370 .dom_sa_cmplen = sizeof(struct in6_addr), 371 .dom_sa_any = (const struct sockaddr *)&in6_any, 372 .dom_sockaddr_externalize = sockaddr_in6_externalize, 373 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 374 }; 375 376 #if 0 377 int 378 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 379 { 380 uint_fast8_t len; 381 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 382 addrend = addrofs + sizeof(struct in6_addr); 383 int rc; 384 const struct sockaddr_in6 *lsin6, *rsin6; 385 386 lsin6 = satocsin6(lsa); 387 rsin6 = satocsin6(rsa); 388 389 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 390 391 if (len > addrofs && 392 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 393 len - addrofs)) != 0) 394 return rc; 395 396 return lsin6->sin6_len - rsin6->sin6_len; 397 } 398 #endif 399 400 /* 401 * Internet configuration info 402 */ 403 #ifndef IPV6FORWARDING 404 #ifdef GATEWAY6 405 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 406 #else 407 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 408 #endif /* GATEWAY6 */ 409 #endif /* !IPV6FORWARDING */ 410 411 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 412 int ip6_sendredirects = 1; 413 int ip6_defhlim = IPV6_DEFHLIM; 414 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 415 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 416 int ip6_maxfragpackets = 200; 417 int ip6_maxfrags = 200; 418 int ip6_log_interval = 5; 419 int ip6_hdrnestlimit = 50; /* appropriate? */ 420 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 421 int ip6_auto_flowlabel = 1; 422 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 423 int ip6_rr_prune = 5; /* router renumbering prefix 424 * walk list every 5 sec. */ 425 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 426 int ip6_v6only = 1; 427 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 428 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 429 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 430 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 431 432 int ip6_keepfaith = 0; 433 time_t ip6_log_time = 0; 434 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 435 * routes via rtadv expected to be 436 * significantly larger than common use. 437 * if you need to count: 3 extra initial 438 * routes, plus 1 per interface after the 439 * first one, then one per non-linklocal 440 * prefix */ 441 442 /* icmp6 */ 443 /* 444 * BSDI4 defines these variables in in_proto.c... 445 * XXX: what if we don't define INET? Should we define pmtu6_expire 446 * or so? (jinmei (at) kame.net 19990310) 447 */ 448 int pmtu_expire = 60*10; 449 450 /* raw IP6 parameters */ 451 /* 452 * Nominal space allocated to a raw ip socket. 453 */ 454 #define RIPV6SNDQ 8192 455 #define RIPV6RCVQ 8192 456 457 u_long rip6_sendspace = RIPV6SNDQ; 458 u_long rip6_recvspace = RIPV6RCVQ; 459 460 /* ICMPV6 parameters */ 461 int icmp6_rediraccept = 1; /* accept and process redirects */ 462 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 463 int icmp6errppslim = 100; /* 100pps */ 464 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 465 466 /* UDP on IP6 parameters */ 467 int udp6_sendspace = 9216; /* really max datagram size */ 468 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 469 /* 40 1K datagrams */ 470
Indexes created Mon Oct 20 20:10:13 GMT 2025