in6_proto.c revision 1.106
1 /* $NetBSD: in6_proto.c,v 1.106 2015/08/24 22:21:27 pooka 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 1.106 2015/08/24 22:21:27 pooka Exp $"); 66 67 #ifdef _KERNEL_OPT 68 #include "opt_gateway.h" 69 #include "opt_inet.h" 70 #include "opt_ipsec.h" 71 #include "opt_dccp.h" 72 #endif 73 74 #include <sys/param.h> 75 #include <sys/socket.h> 76 #include <sys/protosw.h> 77 #include <sys/kernel.h> 78 #include <sys/domain.h> 79 #include <sys/mbuf.h> 80 81 #include <net/if.h> 82 #include <net/radix.h> 83 #include <net/route.h> 84 85 #include <netinet/in.h> 86 #include <netinet/in_systm.h> 87 #include <netinet/in_var.h> 88 #include <netinet/ip_encap.h> 89 #include <netinet/ip.h> 90 #include <netinet/ip_var.h> 91 #include <netinet/in_pcb.h> 92 #include <netinet/ip6.h> 93 #include <netinet6/ip6_var.h> 94 #include <netinet/icmp6.h> 95 #include <netinet6/in6_pcb.h> 96 97 #include <netinet/tcp.h> 98 #include <netinet/tcp_fsm.h> 99 #include <netinet/tcp_seq.h> 100 #include <netinet/tcp_timer.h> 101 #include <netinet/tcp_var.h> 102 #include <netinet/tcpip.h> 103 #include <netinet/tcp_debug.h> 104 105 #include <netinet6/udp6.h> 106 #include <netinet6/udp6_var.h> 107 108 #ifdef DCCP 109 #include <netinet/dccp.h> 110 #include <netinet/dccp_var.h> 111 #include <netinet6/dccp6_var.h> 112 #endif 113 114 #include <netinet6/pim6_var.h> 115 116 #include <netinet6/nd6.h> 117 118 #ifdef IPSEC 119 #include <netipsec/ipsec.h> 120 #include <netipsec/ipsec6.h> 121 #include <netipsec/key.h> 122 #endif /* 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 > 0 132 #include <netinet6/ip6_etherip.h> 133 #endif 134 135 #include <netinet6/ip6protosw.h> 136 137 #include <net/net_osdep.h> 138 139 /* 140 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 141 */ 142 143 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 144 145 /* Wrappers to acquire kernel_lock. */ 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(DCCP) 168 PR_WRAP_CTLINPUT(dccp6_ctlinput) 169 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 170 171 #define dccp6_ctlinput dccp6_ctlinput_wrapper 172 #define dccp_ctloutput dccp_ctloutput_wrapper 173 #endif 174 175 #if defined(IPSEC) 176 PR_WRAP_CTLINPUT(ah6_ctlinput) 177 178 #define ah6_ctlinput ah6_ctlinput_wrapper 179 #endif 180 181 #if defined(IPSEC) 182 PR_WRAP_CTLINPUT(esp6_ctlinput) 183 184 #define esp6_ctlinput esp6_ctlinput_wrapper 185 #endif 186 187 static void 188 tcp6_init(void) 189 { 190 191 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 192 193 tcp_init_common(sizeof(struct ip6_hdr)); 194 } 195 196 const struct ip6protosw inet6sw[] = { 197 { .pr_domain = &inet6domain, 198 .pr_protocol = IPPROTO_IPV6, 199 .pr_init = ip6_init, 200 .pr_fasttimo = frag6_fasttimo, 201 .pr_slowtimo = frag6_slowtimo, 202 .pr_drain = frag6_drainstub, 203 }, 204 { .pr_type = SOCK_DGRAM, 205 .pr_domain = &inet6domain, 206 .pr_protocol = IPPROTO_UDP, 207 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 208 .pr_input = udp6_input, 209 .pr_ctlinput = udp6_ctlinput, 210 .pr_ctloutput = udp6_ctloutput, 211 .pr_usrreqs = &udp6_usrreqs, 212 .pr_init = udp6_init, 213 }, 214 { .pr_type = SOCK_STREAM, 215 .pr_domain = &inet6domain, 216 .pr_protocol = IPPROTO_TCP, 217 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 218 .pr_input = tcp6_input, 219 .pr_ctlinput = tcp6_ctlinput, 220 .pr_ctloutput = tcp_ctloutput, 221 .pr_usrreqs = &tcp_usrreqs, 222 .pr_init = tcp6_init, 223 .pr_fasttimo = tcp_fasttimo, 224 .pr_drain = tcp_drainstub, 225 }, 226 #ifdef DCCP 227 { .pr_type = SOCK_CONN_DGRAM, 228 .pr_domain = &inet6domain, 229 .pr_protocol = IPPROTO_DCCP, 230 .pr_flags = PR_CONNREQUIRED|PR_ATOMIC|PR_LISTEN, 231 .pr_input = dccp6_input, 232 .pr_ctlinput = dccp6_ctlinput, 233 .pr_ctloutput = dccp_ctloutput, 234 .pr_usrreqs = &dccp6_usrreqs, 235 #ifndef INET 236 .pr_init = dccp_init, 237 #endif 238 }, 239 #endif /* DCCP */ 240 { .pr_type = SOCK_RAW, 241 .pr_domain = &inet6domain, 242 .pr_protocol = IPPROTO_RAW, 243 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 244 .pr_input = rip6_input, 245 .pr_output = rip6_output, 246 .pr_ctlinput = rip6_ctlinput, 247 .pr_ctloutput = rip6_ctloutput, 248 .pr_usrreqs = &rip6_usrreqs, 249 }, 250 #ifdef GATEWAY 251 { .pr_domain = &inet6domain, 252 .pr_protocol = IPPROTO_IPV6, 253 .pr_slowtimo = ip6flow_slowtimo, 254 .pr_init = ip6flow_poolinit, 255 }, 256 #endif /* GATEWAY */ 257 { .pr_type = SOCK_RAW, 258 .pr_domain = &inet6domain, 259 .pr_protocol = IPPROTO_ICMPV6, 260 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 261 .pr_input = icmp6_input, 262 .pr_output = rip6_output, 263 .pr_ctlinput = rip6_ctlinput, 264 .pr_ctloutput = icmp6_ctloutput, 265 .pr_usrreqs = &rip6_usrreqs, 266 .pr_init = icmp6_init, 267 }, 268 { .pr_type = SOCK_RAW, 269 .pr_domain = &inet6domain, 270 .pr_protocol = IPPROTO_DSTOPTS, 271 .pr_flags = PR_ATOMIC|PR_ADDR, 272 .pr_input = dest6_input, 273 }, 274 { .pr_type = SOCK_RAW, 275 .pr_domain = &inet6domain, 276 .pr_protocol = IPPROTO_ROUTING, 277 .pr_flags = PR_ATOMIC|PR_ADDR, 278 .pr_input = route6_input, 279 }, 280 { .pr_type = SOCK_RAW, 281 .pr_domain = &inet6domain, 282 .pr_protocol = IPPROTO_FRAGMENT, 283 .pr_flags = PR_ATOMIC|PR_ADDR, 284 .pr_input = frag6_input, 285 }, 286 #ifdef IPSEC 287 { .pr_type = SOCK_RAW, 288 .pr_domain = &inet6domain, 289 .pr_protocol = IPPROTO_AH, 290 .pr_flags = PR_ATOMIC|PR_ADDR, 291 .pr_input = ipsec6_common_input, 292 .pr_ctlinput = ah6_ctlinput, 293 }, 294 { .pr_type = SOCK_RAW, 295 .pr_domain = &inet6domain, 296 .pr_protocol = IPPROTO_ESP, 297 .pr_flags = PR_ATOMIC|PR_ADDR, 298 .pr_input = ipsec6_common_input, 299 .pr_ctlinput = esp6_ctlinput, 300 }, 301 { .pr_type = SOCK_RAW, 302 .pr_domain = &inet6domain, 303 .pr_protocol = IPPROTO_IPCOMP, 304 .pr_flags = PR_ATOMIC|PR_ADDR, 305 .pr_input = ipsec6_common_input, 306 }, 307 #endif /* IPSEC */ 308 #ifdef INET 309 { .pr_type = SOCK_RAW, 310 .pr_domain = &inet6domain, 311 .pr_protocol = IPPROTO_IPV4, 312 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 313 .pr_input = encap6_input, 314 .pr_output = rip6_output, 315 .pr_ctlinput = encap6_ctlinput, 316 .pr_ctloutput = rip6_ctloutput, 317 .pr_usrreqs = &rip6_usrreqs, 318 .pr_init = encap_init, 319 }, 320 #endif 321 { .pr_type = SOCK_RAW, 322 .pr_domain = &inet6domain, 323 .pr_protocol = IPPROTO_IPV6, 324 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 325 .pr_input = encap6_input, 326 .pr_output = rip6_output, 327 .pr_ctlinput = encap6_ctlinput, 328 .pr_ctloutput = rip6_ctloutput, 329 .pr_usrreqs = &rip6_usrreqs, 330 .pr_init = encap_init, 331 }, 332 #if NETHERIP > 0 333 { .pr_type = SOCK_RAW, 334 .pr_domain = &inet6domain, 335 .pr_protocol = IPPROTO_ETHERIP, 336 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 337 .pr_input = ip6_etherip_input, 338 .pr_output = rip6_output, 339 .pr_ctlinput = rip6_ctlinput, 340 .pr_ctloutput = rip6_ctloutput, 341 .pr_usrreqs = &rip6_usrreqs, 342 }, 343 #endif 344 #if NCARP > 0 345 { .pr_type = SOCK_RAW, 346 .pr_domain = &inet6domain, 347 .pr_protocol = IPPROTO_CARP, 348 .pr_flags = PR_ATOMIC|PR_ADDR, 349 .pr_input = carp6_proto_input, 350 .pr_output = rip6_output, 351 .pr_ctloutput = rip6_ctloutput, 352 .pr_usrreqs = &rip6_usrreqs, 353 }, 354 #endif /* NCARP */ 355 { .pr_type = SOCK_RAW, 356 .pr_domain = &inet6domain, 357 .pr_protocol = IPPROTO_PIM, 358 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 359 .pr_input = pim6_input, 360 .pr_output = rip6_output, 361 .pr_ctloutput = rip6_ctloutput, 362 .pr_usrreqs = &rip6_usrreqs, 363 .pr_init = pim6_init, 364 }, 365 /* raw wildcard */ 366 { .pr_type = SOCK_RAW, 367 .pr_domain = &inet6domain, 368 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 369 .pr_input = rip6_input, 370 .pr_output = rip6_output, 371 .pr_ctloutput = rip6_ctloutput, 372 .pr_usrreqs = &rip6_usrreqs, 373 .pr_init = rip6_init, 374 }, 375 }; 376 377 static const struct sockaddr_in6 in6_any = { 378 .sin6_len = sizeof(in6_any) 379 , .sin6_family = AF_INET6 380 , .sin6_port = 0 381 , .sin6_flowinfo = 0 382 , .sin6_addr = IN6ADDR_ANY_INIT 383 , .sin6_scope_id = 0 384 }; 385 386 bool in6_present = false; 387 static void 388 in6_init(void) 389 { 390 391 in6_present = true; 392 } 393 394 struct domain inet6domain = { 395 .dom_family = AF_INET6, .dom_name = "internet6", 396 .dom_init = in6_init, .dom_externalize = NULL, .dom_dispose = NULL, 397 .dom_protosw = (const struct protosw *)inet6sw, 398 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 399 .dom_rtattach = rt_inithead, 400 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 401 .dom_maxrtkey = sizeof(struct ip_pack6), 402 .dom_if_up = in6_if_up, .dom_if_down = in6_if_down, 403 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 404 .dom_if_link_state_change = in6_if_link_state_change, 405 .dom_ifqueues = { NULL, NULL }, 406 .dom_link = { NULL }, 407 .dom_mowner = MOWNER_INIT("",""), 408 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 409 .dom_sa_cmplen = sizeof(struct in6_addr), 410 .dom_sa_any = (const struct sockaddr *)&in6_any, 411 .dom_sockaddr_externalize = sockaddr_in6_externalize, 412 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 413 }; 414 415 #if 0 416 int 417 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 418 { 419 uint_fast8_t len; 420 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 421 addrend = addrofs + sizeof(struct in6_addr); 422 int rc; 423 const struct sockaddr_in6 *lsin6, *rsin6; 424 425 lsin6 = satocsin6(lsa); 426 rsin6 = satocsin6(rsa); 427 428 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 429 430 if (len > addrofs && 431 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 432 len - addrofs)) != 0) 433 return rc; 434 435 return lsin6->sin6_len - rsin6->sin6_len; 436 } 437 #endif 438 439 /* 440 * Internet configuration info 441 */ 442 #ifndef IPV6FORWARDING 443 #ifdef GATEWAY6 444 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 445 #else 446 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 447 #endif /* GATEWAY6 */ 448 #endif /* !IPV6FORWARDING */ 449 450 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 451 int ip6_sendredirects = 1; 452 int ip6_defhlim = IPV6_DEFHLIM; 453 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 454 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 455 int ip6_maxfragpackets = 200; 456 int ip6_maxfrags = 200; 457 int ip6_log_interval = 5; 458 int ip6_hdrnestlimit = 50; /* appropriate? */ 459 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 460 int ip6_auto_flowlabel = 1; 461 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 462 int ip6_rr_prune = 5; /* router renumbering prefix 463 * walk list every 5 sec. */ 464 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 465 int ip6_v6only = 1; 466 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 467 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 468 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 469 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 470 471 int ip6_keepfaith = 0; 472 time_t ip6_log_time = 0; 473 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 474 * routes via rtadv expected to be 475 * significantly larger than common use. 476 * if you need to count: 3 extra initial 477 * routes, plus 1 per interface after the 478 * first one, then one per non-linklocal 479 * prefix */ 480 481 /* icmp6 */ 482 /* 483 * BSDI4 defines these variables in in_proto.c... 484 * XXX: what if we don't define INET? Should we define pmtu6_expire 485 * or so? (jinmei (at) kame.net 19990310) 486 */ 487 int pmtu_expire = 60*10; 488 489 /* raw IP6 parameters */ 490 /* 491 * Nominal space allocated to a raw ip socket. 492 */ 493 #define RIPV6SNDQ 8192 494 #define RIPV6RCVQ 8192 495 496 u_long rip6_sendspace = RIPV6SNDQ; 497 u_long rip6_recvspace = RIPV6RCVQ; 498 499 /* ICMPV6 parameters */ 500 int icmp6_rediraccept = 1; /* accept and process redirects */ 501 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 502 int icmp6errppslim = 100; /* 100pps */ 503 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 504
Indexes created Wed Sep 24 14:09:57 GMT 2025