in6_proto.c revision 1.119
1 /* $NetBSD: in6_proto.c,v 1.119 2017/09/27 10:05:05 ozaki-r 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 1.119 2017/09/27 10:05:05 ozaki-r 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 #include "opt_sctp.h" 73 #include "opt_net_mpsafe.h" 74 #endif 75 76 #include <sys/param.h> 77 #include <sys/socket.h> 78 #include <sys/protosw.h> 79 #include <sys/kernel.h> 80 #include <sys/domain.h> 81 #include <sys/mbuf.h> 82 83 #include <net/if.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 #ifdef SCTP 115 #include <netinet/sctp_pcb.h> 116 #include <netinet/sctp.h> 117 #include <netinet/sctp_var.h> 118 #include <netinet6/sctp6_var.h> 119 #endif 120 121 #include <netinet6/pim6_var.h> 122 123 #ifdef IPSEC 124 #include <netipsec/ipsec.h> 125 #include <netipsec/ipsec6.h> 126 #include <netipsec/key.h> 127 #endif /* IPSEC */ 128 129 130 #include "carp.h" 131 #if NCARP > 0 132 #include <netinet/ip_carp.h> 133 #endif 134 135 #include "etherip.h" 136 #if NETHERIP > 0 137 #include <netinet6/ip6_etherip.h> 138 #endif 139 140 #include <netinet6/ip6protosw.h> 141 142 #include <net/net_osdep.h> 143 144 /* 145 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 146 */ 147 148 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 149 150 /* Wrappers to acquire kernel_lock. */ 151 152 PR_WRAP_CTLINPUT(rip6_ctlinput) 153 PR_WRAP_CTLINPUT(encap6_ctlinput) 154 PR_WRAP_CTLINPUT(udp6_ctlinput) 155 PR_WRAP_CTLINPUT(tcp6_ctlinput) 156 157 #define rip6_ctlinput rip6_ctlinput_wrapper 158 #define encap6_ctlinput encap6_ctlinput_wrapper 159 #define udp6_ctlinput udp6_ctlinput_wrapper 160 #define tcp6_ctlinput tcp6_ctlinput_wrapper 161 162 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 163 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 164 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 165 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 166 167 #define rip6_ctloutput rip6_ctloutput_wrapper 168 #define tcp_ctloutput tcp_ctloutput_wrapper 169 #define udp6_ctloutput udp6_ctloutput_wrapper 170 #define icmp6_ctloutput icmp6_ctloutput_wrapper 171 172 #if defined(DCCP) 173 PR_WRAP_CTLINPUT(dccp6_ctlinput) 174 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 175 176 #define dccp6_ctlinput dccp6_ctlinput_wrapper 177 #define dccp_ctloutput dccp_ctloutput_wrapper 178 #endif 179 180 #if defined(SCTP) 181 PR_WRAP_CTLINPUT(sctp6_ctlinput) 182 PR_WRAP_CTLOUTPUT(sctp_ctloutput) 183 184 #define sctp6_ctlinput sctp6_ctlinput_wrapper 185 #define sctp_ctloutput sctp_ctloutput_wrapper 186 #endif 187 188 #ifdef NET_MPSAFE 189 PR_WRAP_INPUT6(udp6_input) 190 PR_WRAP_INPUT6(tcp6_input) 191 #ifdef DCCP 192 PR_WRAP_INPUT6(dccp6_input) 193 #endif 194 #ifdef SCTP 195 PR_WRAP_INPUT6(sctp6_input) 196 #endif 197 PR_WRAP_INPUT6(rip6_input) 198 PR_WRAP_INPUT6(dest6_input) 199 PR_WRAP_INPUT6(route6_input) 200 PR_WRAP_INPUT6(frag6_input) 201 #if NETHERIP > 0 202 PR_WRAP_INPUT6(ip6_etherip_input) 203 #endif 204 #if NPFSYNC > 0 205 PR_WRAP_INPUT6(pfsync_input) 206 #endif 207 PR_WRAP_INPUT6(pim6_input) 208 209 #define udp6_input udp6_input_wrapper 210 #define tcp6_input tcp6_input_wrapper 211 #define dccp6_input dccp6_input_wrapper 212 #define sctp6_input sctp6_input_wrapper 213 #define rip6_input rip6_input_wrapper 214 #define dest6_input dest6_input_wrapper 215 #define route6_input route6_input_wrapper 216 #define frag6_input frag6_input_wrapper 217 #define ip6_etherip_input ip6_etherip_input_wrapper 218 #define pim6_input pim6_input_wrapper 219 #endif 220 221 #if defined(IPSEC) 222 223 #ifdef IPSEC_RUMPKERNEL 224 /* 225 * .pr_input = ipsec6_common_input won't be resolved on loading 226 * the ipsec shared library. We need a wrapper anyway. 227 */ 228 static int 229 ipsec6_common_input_wrapper(struct mbuf **mp, int *offp, int proto) 230 { 231 232 if (ipsec_enabled) { 233 return ipsec6_common_input(mp, offp, proto); 234 } else { 235 m_freem(*mp); 236 return IPPROTO_DONE; 237 } 238 } 239 #define ipsec6_common_input ipsec6_common_input_wrapper 240 241 /* The ctlinput functions may not be loaded */ 242 #define IPSEC_WRAP_CTLINPUT(name) \ 243 static void * \ 244 name##_wrapper(int a, const struct sockaddr *b, void *c)\ 245 { \ 246 void *rv; \ 247 KERNEL_LOCK(1, NULL); \ 248 if (ipsec_enabled) \ 249 rv = name(a, b, c); \ 250 else \ 251 rv = NULL; \ 252 KERNEL_UNLOCK_ONE(NULL); \ 253 return rv; \ 254 } 255 IPSEC_WRAP_CTLINPUT(ah6_ctlinput) 256 IPSEC_WRAP_CTLINPUT(esp6_ctlinput) 257 258 #else /* !IPSEC_RUMPKERNEL */ 259 260 PR_WRAP_CTLINPUT(ah6_ctlinput) 261 PR_WRAP_CTLINPUT(esp6_ctlinput) 262 263 #endif /* !IPSEC_RUMPKERNEL */ 264 265 #define ah6_ctlinput ah6_ctlinput_wrapper 266 #define esp6_ctlinput esp6_ctlinput_wrapper 267 268 #endif /* IPSEC */ 269 270 static void 271 tcp6_init(void) 272 { 273 274 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 275 276 tcp_init_common(sizeof(struct ip6_hdr)); 277 } 278 279 const struct ip6protosw inet6sw[] = { 280 { .pr_domain = &inet6domain, 281 .pr_protocol = IPPROTO_IPV6, 282 .pr_init = ip6_init, 283 .pr_fasttimo = frag6_fasttimo, 284 .pr_slowtimo = frag6_slowtimo, 285 .pr_drain = frag6_drainstub, 286 }, 287 { .pr_type = SOCK_RAW, 288 .pr_domain = &inet6domain, 289 .pr_protocol = IPPROTO_ICMPV6, 290 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 291 .pr_input = icmp6_input, 292 .pr_ctlinput = rip6_ctlinput, 293 .pr_ctloutput = icmp6_ctloutput, 294 .pr_usrreqs = &rip6_usrreqs, 295 .pr_init = icmp6_init, 296 }, 297 { .pr_type = SOCK_DGRAM, 298 .pr_domain = &inet6domain, 299 .pr_protocol = IPPROTO_UDP, 300 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 301 .pr_input = udp6_input, 302 .pr_ctlinput = udp6_ctlinput, 303 .pr_ctloutput = udp6_ctloutput, 304 .pr_usrreqs = &udp6_usrreqs, 305 .pr_init = udp6_init, 306 }, 307 { .pr_type = SOCK_STREAM, 308 .pr_domain = &inet6domain, 309 .pr_protocol = IPPROTO_TCP, 310 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 311 .pr_input = tcp6_input, 312 .pr_ctlinput = tcp6_ctlinput, 313 .pr_ctloutput = tcp_ctloutput, 314 .pr_usrreqs = &tcp_usrreqs, 315 .pr_init = tcp6_init, 316 .pr_fasttimo = tcp_fasttimo, 317 .pr_drain = tcp_drainstub, 318 }, 319 #ifdef DCCP 320 { .pr_type = SOCK_CONN_DGRAM, 321 .pr_domain = &inet6domain, 322 .pr_protocol = IPPROTO_DCCP, 323 .pr_flags = PR_CONNREQUIRED|PR_ATOMIC|PR_LISTEN, 324 .pr_input = dccp6_input, 325 .pr_ctlinput = dccp6_ctlinput, 326 .pr_ctloutput = dccp_ctloutput, 327 .pr_usrreqs = &dccp6_usrreqs, 328 #ifndef INET 329 .pr_init = dccp_init, 330 #endif 331 }, 332 #endif /* DCCP */ 333 #ifdef SCTP 334 { .pr_type = SOCK_DGRAM, 335 .pr_domain = &inet6domain, 336 .pr_protocol = IPPROTO_SCTP, 337 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 338 .pr_input = sctp6_input, 339 .pr_ctlinput = sctp6_ctlinput, 340 .pr_ctloutput = sctp_ctloutput, 341 .pr_usrreqs = &sctp6_usrreqs, 342 .pr_drain = sctp_drain, 343 }, 344 { .pr_type = SOCK_SEQPACKET, 345 .pr_domain = &inet6domain, 346 .pr_protocol = IPPROTO_SCTP, 347 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 348 .pr_input = sctp6_input, 349 .pr_ctlinput = sctp6_ctlinput, 350 .pr_ctloutput = sctp_ctloutput, 351 .pr_drain = sctp_drain, 352 }, 353 { .pr_type = SOCK_STREAM, 354 .pr_domain = &inet6domain, 355 .pr_protocol = IPPROTO_SCTP, 356 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, 357 .pr_input = sctp6_input, 358 .pr_ctlinput = sctp6_ctlinput, 359 .pr_ctloutput = sctp_ctloutput, 360 .pr_drain = sctp_drain, 361 }, 362 #endif /* SCTP */ 363 { .pr_type = SOCK_RAW, 364 .pr_domain = &inet6domain, 365 .pr_protocol = IPPROTO_RAW, 366 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 367 .pr_input = rip6_input, 368 .pr_ctlinput = rip6_ctlinput, 369 .pr_ctloutput = rip6_ctloutput, 370 .pr_usrreqs = &rip6_usrreqs, 371 }, 372 #ifdef GATEWAY 373 { .pr_domain = &inet6domain, 374 .pr_protocol = IPPROTO_IPV6, 375 .pr_slowtimo = ip6flow_slowtimo, 376 .pr_init = ip6flow_poolinit, 377 }, 378 #endif /* GATEWAY */ 379 { .pr_type = SOCK_RAW, 380 .pr_domain = &inet6domain, 381 .pr_protocol = IPPROTO_DSTOPTS, 382 .pr_flags = PR_ATOMIC|PR_ADDR, 383 .pr_input = dest6_input, 384 }, 385 { .pr_type = SOCK_RAW, 386 .pr_domain = &inet6domain, 387 .pr_protocol = IPPROTO_ROUTING, 388 .pr_flags = PR_ATOMIC|PR_ADDR, 389 .pr_input = route6_input, 390 }, 391 { .pr_type = SOCK_RAW, 392 .pr_domain = &inet6domain, 393 .pr_protocol = IPPROTO_FRAGMENT, 394 .pr_flags = PR_ATOMIC|PR_ADDR, 395 .pr_input = frag6_input, 396 }, 397 #ifdef IPSEC 398 { .pr_type = SOCK_RAW, 399 .pr_domain = &inet6domain, 400 .pr_protocol = IPPROTO_AH, 401 .pr_flags = PR_ATOMIC|PR_ADDR, 402 .pr_input = ipsec6_common_input, 403 .pr_ctlinput = ah6_ctlinput, 404 }, 405 { .pr_type = SOCK_RAW, 406 .pr_domain = &inet6domain, 407 .pr_protocol = IPPROTO_ESP, 408 .pr_flags = PR_ATOMIC|PR_ADDR, 409 .pr_input = ipsec6_common_input, 410 .pr_ctlinput = esp6_ctlinput, 411 }, 412 { .pr_type = SOCK_RAW, 413 .pr_domain = &inet6domain, 414 .pr_protocol = IPPROTO_IPCOMP, 415 .pr_flags = PR_ATOMIC|PR_ADDR, 416 .pr_input = ipsec6_common_input, 417 }, 418 #endif /* IPSEC */ 419 #ifdef INET 420 { .pr_type = SOCK_RAW, 421 .pr_domain = &inet6domain, 422 .pr_protocol = IPPROTO_IPV4, 423 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 424 .pr_input = encap6_input, 425 .pr_ctlinput = encap6_ctlinput, 426 .pr_ctloutput = rip6_ctloutput, 427 .pr_usrreqs = &rip6_usrreqs, 428 .pr_init = encap_init, 429 }, 430 #endif 431 { .pr_type = SOCK_RAW, 432 .pr_domain = &inet6domain, 433 .pr_protocol = IPPROTO_IPV6, 434 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 435 .pr_input = encap6_input, 436 .pr_ctlinput = encap6_ctlinput, 437 .pr_ctloutput = rip6_ctloutput, 438 .pr_usrreqs = &rip6_usrreqs, 439 .pr_init = encap_init, 440 }, 441 #if NETHERIP > 0 442 { .pr_type = SOCK_RAW, 443 .pr_domain = &inet6domain, 444 .pr_protocol = IPPROTO_ETHERIP, 445 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 446 .pr_input = ip6_etherip_input, 447 .pr_ctlinput = rip6_ctlinput, 448 .pr_ctloutput = rip6_ctloutput, 449 .pr_usrreqs = &rip6_usrreqs, 450 }, 451 #endif 452 #if NCARP > 0 453 { .pr_type = SOCK_RAW, 454 .pr_domain = &inet6domain, 455 .pr_protocol = IPPROTO_CARP, 456 .pr_flags = PR_ATOMIC|PR_ADDR, 457 .pr_input = carp6_proto_input, 458 .pr_ctloutput = rip6_ctloutput, 459 .pr_usrreqs = &rip6_usrreqs, 460 }, 461 #endif /* NCARP */ 462 { .pr_type = SOCK_RAW, 463 .pr_domain = &inet6domain, 464 .pr_protocol = IPPROTO_L2TP, 465 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 466 .pr_input = encap6_input, 467 .pr_ctlinput = rip6_ctlinput, 468 .pr_ctloutput = rip6_ctloutput, 469 .pr_usrreqs = &rip6_usrreqs, 470 .pr_init = encap_init, 471 }, 472 { .pr_type = SOCK_RAW, 473 .pr_domain = &inet6domain, 474 .pr_protocol = IPPROTO_PIM, 475 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 476 .pr_input = pim6_input, 477 .pr_ctloutput = rip6_ctloutput, 478 .pr_usrreqs = &rip6_usrreqs, 479 .pr_init = pim6_init, 480 }, 481 /* raw wildcard */ 482 { .pr_type = SOCK_RAW, 483 .pr_domain = &inet6domain, 484 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 485 .pr_input = rip6_input, 486 .pr_ctloutput = rip6_ctloutput, 487 .pr_usrreqs = &rip6_usrreqs, 488 .pr_init = rip6_init, 489 }, 490 }; 491 492 static const struct sockaddr_in6 in6_any = { 493 .sin6_len = sizeof(in6_any) 494 , .sin6_family = AF_INET6 495 , .sin6_port = 0 496 , .sin6_flowinfo = 0 497 , .sin6_addr = IN6ADDR_ANY_INIT 498 , .sin6_scope_id = 0 499 }; 500 501 bool in6_present = false; 502 static void 503 in6_dom_init(void) 504 { 505 506 in6_present = true; 507 } 508 509 struct domain inet6domain = { 510 .dom_family = AF_INET6, .dom_name = "internet6", 511 .dom_init = in6_dom_init, .dom_externalize = NULL, .dom_dispose = NULL, 512 .dom_protosw = (const struct protosw *)inet6sw, 513 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 514 .dom_rtattach = rt_inithead, 515 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 516 .dom_maxrtkey = sizeof(struct ip_pack6), 517 .dom_if_up = in6_if_up, .dom_if_down = in6_if_down, 518 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 519 .dom_if_link_state_change = in6_if_link_state_change, 520 .dom_ifqueues = { NULL, NULL }, 521 .dom_link = { NULL }, 522 .dom_mowner = MOWNER_INIT("",""), 523 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 524 .dom_sa_cmplen = sizeof(struct in6_addr), 525 .dom_sa_any = (const struct sockaddr *)&in6_any, 526 .dom_sockaddr_externalize = sockaddr_in6_externalize, 527 }; 528 529 #if 0 530 int 531 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 532 { 533 uint_fast8_t len; 534 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 535 addrend = addrofs + sizeof(struct in6_addr); 536 int rc; 537 const struct sockaddr_in6 *lsin6, *rsin6; 538 539 lsin6 = satocsin6(lsa); 540 rsin6 = satocsin6(rsa); 541 542 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 543 544 if (len > addrofs && 545 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 546 len - addrofs)) != 0) 547 return rc; 548 549 return lsin6->sin6_len - rsin6->sin6_len; 550 } 551 #endif 552 553 /* 554 * Internet configuration info 555 */ 556 #ifndef IPV6FORWARDING 557 #ifdef GATEWAY6 558 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 559 #else 560 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 561 #endif /* GATEWAY6 */ 562 #endif /* !IPV6FORWARDING */ 563 564 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 565 int ip6_sendredirects = 1; 566 int ip6_defhlim = IPV6_DEFHLIM; 567 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 568 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 569 int ip6_maxfragpackets = 200; 570 int ip6_maxfrags = 200; 571 int ip6_log_interval = 5; 572 int ip6_hdrnestlimit = 50; /* appropriate? */ 573 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 574 int ip6_auto_flowlabel = 1; 575 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 576 int ip6_rr_prune = 5; /* router renumbering prefix 577 * walk list every 5 sec. */ 578 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 579 int ip6_v6only = 1; 580 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 581 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 582 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 583 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 584 585 int ip6_keepfaith = 0; 586 time_t ip6_log_time = 0; 587 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 588 * routes via rtadv expected to be 589 * significantly larger than common use. 590 * if you need to count: 3 extra initial 591 * routes, plus 1 per interface after the 592 * first one, then one per non-linklocal 593 * prefix */ 594 595 /* icmp6 */ 596 /* 597 * BSDI4 defines these variables in in_proto.c... 598 * XXX: what if we don't define INET? Should we define pmtu6_expire 599 * or so? (jinmei (at) kame.net 19990310) 600 */ 601 int pmtu_expire = 60*10; 602 603 /* raw IP6 parameters */ 604 /* 605 * Nominal space allocated to a raw ip socket. 606 */ 607 #define RIPV6SNDQ 8192 608 #define RIPV6RCVQ 8192 609 610 u_long rip6_sendspace = RIPV6SNDQ; 611 u_long rip6_recvspace = RIPV6RCVQ; 612 613 /* ICMPV6 parameters */ 614 int icmp6_rediraccept = 1; /* accept and process redirects */ 615 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 616 int icmp6errppslim = 100; /* 100pps */ 617 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 618
Indexes created Wed Sep 24 05:09:52 GMT 2025