in6_proto.c revision 1.101
1 /* $NetBSD: in6_proto.c,v 1.101 2014/05/18 14:46:16 rmind 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 1.101 2014/05/18 14:46:16 rmind 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 IPSEC 110 #include <netipsec/ipsec.h> 111 #include <netipsec/ipsec6.h> 112 #include <netipsec/key.h> 113 #endif /* 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_CTLINPUT(rip6_ctlinput) 139 PR_WRAP_CTLINPUT(encap6_ctlinput) 140 PR_WRAP_CTLINPUT(udp6_ctlinput) 141 PR_WRAP_CTLINPUT(tcp6_ctlinput) 142 143 #define rip6_ctlinput rip6_ctlinput_wrapper 144 #define encap6_ctlinput encap6_ctlinput_wrapper 145 #define udp6_ctlinput udp6_ctlinput_wrapper 146 #define tcp6_ctlinput tcp6_ctlinput_wrapper 147 148 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 149 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 150 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 151 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 152 153 #define rip6_ctloutput rip6_ctloutput_wrapper 154 #define tcp_ctloutput tcp_ctloutput_wrapper 155 #define udp6_ctloutput udp6_ctloutput_wrapper 156 #define icmp6_ctloutput icmp6_ctloutput_wrapper 157 158 #if defined(IPSEC) 159 PR_WRAP_CTLINPUT(ah6_ctlinput) 160 161 #define ah6_ctlinput ah6_ctlinput_wrapper 162 #endif 163 164 #if defined(IPSEC) 165 PR_WRAP_CTLINPUT(esp6_ctlinput) 166 167 #define esp6_ctlinput esp6_ctlinput_wrapper 168 #endif 169 170 static void 171 tcp6_init(void) 172 { 173 174 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 175 176 tcp_init_common(sizeof(struct ip6_hdr)); 177 } 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_usrreqs = &udp6_usrreqs, 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_usrreqs = &tcp_usrreqs, 205 .pr_init = tcp6_init, 206 .pr_fasttimo = tcp_fasttimo, 207 .pr_drain = tcp_drainstub, 208 }, 209 { .pr_type = SOCK_RAW, 210 .pr_domain = &inet6domain, 211 .pr_protocol = IPPROTO_RAW, 212 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 213 .pr_input = rip6_input, 214 .pr_output = rip6_output, 215 .pr_ctlinput = rip6_ctlinput, 216 .pr_ctloutput = rip6_ctloutput, 217 .pr_usrreqs = &rip6_usrreqs, 218 }, 219 #ifdef GATEWAY 220 { .pr_domain = &inet6domain, 221 .pr_protocol = IPPROTO_IPV6, 222 .pr_slowtimo = ip6flow_slowtimo, 223 .pr_init = ip6flow_poolinit, 224 }, 225 #endif /* GATEWAY */ 226 { .pr_type = SOCK_RAW, 227 .pr_domain = &inet6domain, 228 .pr_protocol = IPPROTO_ICMPV6, 229 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 230 .pr_input = icmp6_input, 231 .pr_output = rip6_output, 232 .pr_ctlinput = rip6_ctlinput, 233 .pr_ctloutput = icmp6_ctloutput, 234 .pr_usrreqs = &rip6_usrreqs, 235 .pr_init = icmp6_init, 236 }, 237 { .pr_type = SOCK_RAW, 238 .pr_domain = &inet6domain, 239 .pr_protocol = IPPROTO_DSTOPTS, 240 .pr_flags = PR_ATOMIC|PR_ADDR, 241 .pr_input = dest6_input, 242 }, 243 { .pr_type = SOCK_RAW, 244 .pr_domain = &inet6domain, 245 .pr_protocol = IPPROTO_ROUTING, 246 .pr_flags = PR_ATOMIC|PR_ADDR, 247 .pr_input = route6_input, 248 }, 249 { .pr_type = SOCK_RAW, 250 .pr_domain = &inet6domain, 251 .pr_protocol = IPPROTO_FRAGMENT, 252 .pr_flags = PR_ATOMIC|PR_ADDR, 253 .pr_input = frag6_input, 254 }, 255 #ifdef IPSEC 256 { .pr_type = SOCK_RAW, 257 .pr_domain = &inet6domain, 258 .pr_protocol = IPPROTO_AH, 259 .pr_flags = PR_ATOMIC|PR_ADDR, 260 .pr_input = ipsec6_common_input, 261 .pr_ctlinput = ah6_ctlinput, 262 }, 263 { .pr_type = SOCK_RAW, 264 .pr_domain = &inet6domain, 265 .pr_protocol = IPPROTO_ESP, 266 .pr_flags = PR_ATOMIC|PR_ADDR, 267 .pr_input = ipsec6_common_input, 268 .pr_ctlinput = esp6_ctlinput, 269 }, 270 { .pr_type = SOCK_RAW, 271 .pr_domain = &inet6domain, 272 .pr_protocol = IPPROTO_IPCOMP, 273 .pr_flags = PR_ATOMIC|PR_ADDR, 274 .pr_input = ipsec6_common_input, 275 }, 276 #endif /* IPSEC */ 277 #ifdef INET 278 { .pr_type = SOCK_RAW, 279 .pr_domain = &inet6domain, 280 .pr_protocol = IPPROTO_IPV4, 281 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 282 .pr_input = encap6_input, 283 .pr_output = rip6_output, 284 .pr_ctlinput = encap6_ctlinput, 285 .pr_ctloutput = rip6_ctloutput, 286 .pr_usrreqs = &rip6_usrreqs, 287 .pr_init = encap_init, 288 }, 289 #endif 290 { .pr_type = SOCK_RAW, 291 .pr_domain = &inet6domain, 292 .pr_protocol = IPPROTO_IPV6, 293 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 294 .pr_input = encap6_input, 295 .pr_output = rip6_output, 296 .pr_ctlinput = encap6_ctlinput, 297 .pr_ctloutput = rip6_ctloutput, 298 .pr_usrreqs = &rip6_usrreqs, 299 .pr_init = encap_init, 300 }, 301 #if NETHERIP > 0 302 { .pr_type = SOCK_RAW, 303 .pr_domain = &inet6domain, 304 .pr_protocol = IPPROTO_ETHERIP, 305 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 306 .pr_input = ip6_etherip_input, 307 .pr_output = rip6_output, 308 .pr_ctlinput = rip6_ctlinput, 309 .pr_ctloutput = rip6_ctloutput, 310 .pr_usrreqs = &rip6_usrreqs, 311 }, 312 #endif 313 #if NCARP > 0 314 { .pr_type = SOCK_RAW, 315 .pr_domain = &inet6domain, 316 .pr_protocol = IPPROTO_CARP, 317 .pr_flags = PR_ATOMIC|PR_ADDR, 318 .pr_input = carp6_proto_input, 319 .pr_output = rip6_output, 320 .pr_ctloutput = rip6_ctloutput, 321 .pr_usrreqs = &rip6_usrreqs, 322 }, 323 #endif /* NCARP */ 324 { .pr_type = SOCK_RAW, 325 .pr_domain = &inet6domain, 326 .pr_protocol = IPPROTO_PIM, 327 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 328 .pr_input = pim6_input, 329 .pr_output = rip6_output, 330 .pr_ctloutput = rip6_ctloutput, 331 .pr_usrreqs = &rip6_usrreqs, 332 .pr_init = pim6_init, 333 }, 334 /* raw wildcard */ 335 { .pr_type = SOCK_RAW, 336 .pr_domain = &inet6domain, 337 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 338 .pr_input = rip6_input, 339 .pr_output = rip6_output, 340 .pr_ctloutput = rip6_ctloutput, 341 .pr_usrreqs = &rip6_usrreqs, 342 .pr_init = rip6_init, 343 }, 344 }; 345 346 static const struct sockaddr_in6 in6_any = { 347 .sin6_len = sizeof(in6_any) 348 , .sin6_family = AF_INET6 349 , .sin6_port = 0 350 , .sin6_flowinfo = 0 351 , .sin6_addr = IN6ADDR_ANY_INIT 352 , .sin6_scope_id = 0 353 }; 354 355 bool in6_present = false; 356 static void 357 in6_init(void) 358 { 359 360 in6_present = true; 361 } 362 363 struct domain inet6domain = { 364 .dom_family = AF_INET6, .dom_name = "internet6", 365 .dom_init = in6_init, .dom_externalize = NULL, .dom_dispose = NULL, 366 .dom_protosw = (const struct protosw *)inet6sw, 367 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 368 .dom_rtattach = rt_inithead, 369 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 370 .dom_maxrtkey = sizeof(struct ip_pack6), 371 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 372 .dom_ifqueues = { &ip6intrq, NULL }, 373 .dom_link = { NULL }, 374 .dom_mowner = MOWNER_INIT("",""), 375 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 376 .dom_sa_cmplen = sizeof(struct in6_addr), 377 .dom_sa_any = (const struct sockaddr *)&in6_any, 378 .dom_sockaddr_externalize = sockaddr_in6_externalize, 379 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 380 }; 381 382 #if 0 383 int 384 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 385 { 386 uint_fast8_t len; 387 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 388 addrend = addrofs + sizeof(struct in6_addr); 389 int rc; 390 const struct sockaddr_in6 *lsin6, *rsin6; 391 392 lsin6 = satocsin6(lsa); 393 rsin6 = satocsin6(rsa); 394 395 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 396 397 if (len > addrofs && 398 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 399 len - addrofs)) != 0) 400 return rc; 401 402 return lsin6->sin6_len - rsin6->sin6_len; 403 } 404 #endif 405 406 /* 407 * Internet configuration info 408 */ 409 #ifndef IPV6FORWARDING 410 #ifdef GATEWAY6 411 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 412 #else 413 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 414 #endif /* GATEWAY6 */ 415 #endif /* !IPV6FORWARDING */ 416 417 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 418 int ip6_sendredirects = 1; 419 int ip6_defhlim = IPV6_DEFHLIM; 420 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 421 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 422 int ip6_maxfragpackets = 200; 423 int ip6_maxfrags = 200; 424 int ip6_log_interval = 5; 425 int ip6_hdrnestlimit = 50; /* appropriate? */ 426 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 427 int ip6_auto_flowlabel = 1; 428 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 429 int ip6_rr_prune = 5; /* router renumbering prefix 430 * walk list every 5 sec. */ 431 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 432 int ip6_v6only = 1; 433 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 434 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 435 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 436 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 437 438 int ip6_keepfaith = 0; 439 time_t ip6_log_time = 0; 440 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 441 * routes via rtadv expected to be 442 * significantly larger than common use. 443 * if you need to count: 3 extra initial 444 * routes, plus 1 per interface after the 445 * first one, then one per non-linklocal 446 * prefix */ 447 448 /* icmp6 */ 449 /* 450 * BSDI4 defines these variables in in_proto.c... 451 * XXX: what if we don't define INET? Should we define pmtu6_expire 452 * or so? (jinmei (at) kame.net 19990310) 453 */ 454 int pmtu_expire = 60*10; 455 456 /* raw IP6 parameters */ 457 /* 458 * Nominal space allocated to a raw ip socket. 459 */ 460 #define RIPV6SNDQ 8192 461 #define RIPV6RCVQ 8192 462 463 u_long rip6_sendspace = RIPV6SNDQ; 464 u_long rip6_recvspace = RIPV6RCVQ; 465 466 /* ICMPV6 parameters */ 467 int icmp6_rediraccept = 1; /* accept and process redirects */ 468 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 469 int icmp6errppslim = 100; /* 100pps */ 470 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 471 472 /* UDP on IP6 parameters */ 473 int udp6_sendspace = 9216; /* really max datagram size */ 474 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 475 /* 40 1K datagrams */ 476
Indexes created Tue Sep 23 21:09:50 GMT 2025