in6_proto.c revision 1.125
1 /* $NetBSD: in6_proto.c,v 1.125 2018/05/11 09:43:59 roy 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 1.125 2018/05/11 09:43:59 roy 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/tcp_debug.h> 103 104 #include <netinet6/udp6.h> 105 #include <netinet6/udp6_var.h> 106 107 #ifdef DCCP 108 #include <netinet/dccp.h> 109 #include <netinet/dccp_var.h> 110 #include <netinet6/dccp6_var.h> 111 #endif 112 113 #ifdef SCTP 114 #include <netinet/sctp_pcb.h> 115 #include <netinet/sctp.h> 116 #include <netinet/sctp_var.h> 117 #include <netinet6/sctp6_var.h> 118 #endif 119 120 #include <netinet6/pim6_var.h> 121 122 #ifdef IPSEC 123 #include <netipsec/ipsec.h> 124 #include <netipsec/ipsec6.h> 125 #include <netipsec/key.h> 126 #endif 127 128 #include "carp.h" 129 #if NCARP > 0 130 #include <netinet/ip_carp.h> 131 #endif 132 133 #include "etherip.h" 134 #if NETHERIP > 0 135 #include <netinet6/ip6_etherip.h> 136 #endif 137 138 #include <netinet6/ip6protosw.h> 139 140 /* 141 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 142 */ 143 144 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 145 146 /* Wrappers to acquire kernel_lock. */ 147 148 PR_WRAP_CTLINPUT(rip6_ctlinput) 149 PR_WRAP_CTLINPUT(encap6_ctlinput) 150 PR_WRAP_CTLINPUT(udp6_ctlinput) 151 PR_WRAP_CTLINPUT(tcp6_ctlinput) 152 153 #define rip6_ctlinput rip6_ctlinput_wrapper 154 #define encap6_ctlinput encap6_ctlinput_wrapper 155 #define udp6_ctlinput udp6_ctlinput_wrapper 156 #define tcp6_ctlinput tcp6_ctlinput_wrapper 157 158 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 159 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 160 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 161 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 162 163 #define rip6_ctloutput rip6_ctloutput_wrapper 164 #define tcp_ctloutput tcp_ctloutput_wrapper 165 #define udp6_ctloutput udp6_ctloutput_wrapper 166 #define icmp6_ctloutput icmp6_ctloutput_wrapper 167 168 #if defined(DCCP) 169 PR_WRAP_CTLINPUT(dccp6_ctlinput) 170 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 171 172 #define dccp6_ctlinput dccp6_ctlinput_wrapper 173 #define dccp_ctloutput dccp_ctloutput_wrapper 174 #endif 175 176 #if defined(SCTP) 177 PR_WRAP_CTLINPUT(sctp6_ctlinput) 178 PR_WRAP_CTLOUTPUT(sctp_ctloutput) 179 180 #define sctp6_ctlinput sctp6_ctlinput_wrapper 181 #define sctp_ctloutput sctp_ctloutput_wrapper 182 #endif 183 184 #ifdef NET_MPSAFE 185 PR_WRAP_INPUT6(udp6_input) 186 PR_WRAP_INPUT6(tcp6_input) 187 #ifdef DCCP 188 PR_WRAP_INPUT6(dccp6_input) 189 #endif 190 #ifdef SCTP 191 PR_WRAP_INPUT6(sctp6_input) 192 #endif 193 PR_WRAP_INPUT6(rip6_input) 194 PR_WRAP_INPUT6(dest6_input) 195 PR_WRAP_INPUT6(route6_input) 196 PR_WRAP_INPUT6(frag6_input) 197 #if NETHERIP > 0 198 PR_WRAP_INPUT6(ip6_etherip_input) 199 #endif 200 #if NPFSYNC > 0 201 PR_WRAP_INPUT6(pfsync_input) 202 #endif 203 PR_WRAP_INPUT6(pim6_input) 204 205 #define udp6_input udp6_input_wrapper 206 #define tcp6_input tcp6_input_wrapper 207 #define dccp6_input dccp6_input_wrapper 208 #define sctp6_input sctp6_input_wrapper 209 #define rip6_input rip6_input_wrapper 210 #define dest6_input dest6_input_wrapper 211 #define route6_input route6_input_wrapper 212 #define frag6_input frag6_input_wrapper 213 #define ip6_etherip_input ip6_etherip_input_wrapper 214 #define pim6_input pim6_input_wrapper 215 #endif 216 217 #if defined(IPSEC) 218 219 #ifdef IPSEC_RUMPKERNEL 220 /* 221 * .pr_input = ipsec6_common_input won't be resolved on loading 222 * the ipsec shared library. We need a wrapper anyway. 223 */ 224 static int 225 ipsec6_common_input_wrapper(struct mbuf **mp, int *offp, int proto) 226 { 227 228 if (ipsec_enabled) { 229 return ipsec6_common_input(mp, offp, proto); 230 } else { 231 m_freem(*mp); 232 return IPPROTO_DONE; 233 } 234 } 235 #define ipsec6_common_input ipsec6_common_input_wrapper 236 237 /* The ctlinput functions may not be loaded */ 238 #define IPSEC_WRAP_CTLINPUT(name) \ 239 static void * \ 240 name##_wrapper(int a, const struct sockaddr *b, void *c)\ 241 { \ 242 void *rv; \ 243 KERNEL_LOCK(1, NULL); \ 244 if (ipsec_enabled) \ 245 rv = name(a, b, c); \ 246 else \ 247 rv = NULL; \ 248 KERNEL_UNLOCK_ONE(NULL); \ 249 return rv; \ 250 } 251 IPSEC_WRAP_CTLINPUT(ah6_ctlinput) 252 IPSEC_WRAP_CTLINPUT(esp6_ctlinput) 253 254 #else /* !IPSEC_RUMPKERNEL */ 255 256 PR_WRAP_CTLINPUT(ah6_ctlinput) 257 PR_WRAP_CTLINPUT(esp6_ctlinput) 258 259 #endif /* !IPSEC_RUMPKERNEL */ 260 261 #define ah6_ctlinput ah6_ctlinput_wrapper 262 #define esp6_ctlinput esp6_ctlinput_wrapper 263 264 #endif /* IPSEC */ 265 266 static void 267 tcp6_init(void) 268 { 269 270 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 271 272 tcp_init_common(sizeof(struct ip6_hdr)); 273 } 274 275 const struct ip6protosw inet6sw[] = { 276 { .pr_domain = &inet6domain, 277 .pr_protocol = IPPROTO_IPV6, 278 .pr_init = ip6_init, 279 .pr_fasttimo = frag6_fasttimo, 280 .pr_slowtimo = frag6_slowtimo, 281 .pr_drain = frag6_drainstub, 282 }, 283 { .pr_type = SOCK_RAW, 284 .pr_domain = &inet6domain, 285 .pr_protocol = IPPROTO_ICMPV6, 286 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 287 .pr_input = icmp6_input, 288 .pr_ctlinput = rip6_ctlinput, 289 .pr_ctloutput = icmp6_ctloutput, 290 .pr_usrreqs = &rip6_usrreqs, 291 .pr_init = icmp6_init, 292 }, 293 { .pr_type = SOCK_DGRAM, 294 .pr_domain = &inet6domain, 295 .pr_protocol = IPPROTO_UDP, 296 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 297 .pr_input = udp6_input, 298 .pr_ctlinput = udp6_ctlinput, 299 .pr_ctloutput = udp6_ctloutput, 300 .pr_usrreqs = &udp6_usrreqs, 301 .pr_init = udp6_init, 302 }, 303 { .pr_type = SOCK_STREAM, 304 .pr_domain = &inet6domain, 305 .pr_protocol = IPPROTO_TCP, 306 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 307 .pr_input = tcp6_input, 308 .pr_ctlinput = tcp6_ctlinput, 309 .pr_ctloutput = tcp_ctloutput, 310 .pr_usrreqs = &tcp_usrreqs, 311 .pr_init = tcp6_init, 312 .pr_fasttimo = tcp_fasttimo, 313 .pr_drain = tcp_drainstub, 314 }, 315 #ifdef DCCP 316 { .pr_type = SOCK_CONN_DGRAM, 317 .pr_domain = &inet6domain, 318 .pr_protocol = IPPROTO_DCCP, 319 .pr_flags = PR_CONNREQUIRED|PR_ATOMIC|PR_LISTEN, 320 .pr_input = dccp6_input, 321 .pr_ctlinput = dccp6_ctlinput, 322 .pr_ctloutput = dccp_ctloutput, 323 .pr_usrreqs = &dccp6_usrreqs, 324 #ifndef INET 325 .pr_init = dccp_init, 326 #endif 327 }, 328 #endif /* DCCP */ 329 #ifdef SCTP 330 { .pr_type = SOCK_DGRAM, 331 .pr_domain = &inet6domain, 332 .pr_protocol = IPPROTO_SCTP, 333 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 334 .pr_input = sctp6_input, 335 .pr_ctlinput = sctp6_ctlinput, 336 .pr_ctloutput = sctp_ctloutput, 337 .pr_usrreqs = &sctp6_usrreqs, 338 .pr_drain = sctp_drain, 339 }, 340 { .pr_type = SOCK_SEQPACKET, 341 .pr_domain = &inet6domain, 342 .pr_protocol = IPPROTO_SCTP, 343 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 344 .pr_input = sctp6_input, 345 .pr_ctlinput = sctp6_ctlinput, 346 .pr_ctloutput = sctp_ctloutput, 347 .pr_drain = sctp_drain, 348 }, 349 { .pr_type = SOCK_STREAM, 350 .pr_domain = &inet6domain, 351 .pr_protocol = IPPROTO_SCTP, 352 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, 353 .pr_input = sctp6_input, 354 .pr_ctlinput = sctp6_ctlinput, 355 .pr_ctloutput = sctp_ctloutput, 356 .pr_drain = sctp_drain, 357 }, 358 #endif /* SCTP */ 359 { .pr_type = SOCK_RAW, 360 .pr_domain = &inet6domain, 361 .pr_protocol = IPPROTO_RAW, 362 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 363 .pr_input = rip6_input, 364 .pr_ctlinput = rip6_ctlinput, 365 .pr_ctloutput = rip6_ctloutput, 366 .pr_usrreqs = &rip6_usrreqs, 367 }, 368 #ifdef GATEWAY 369 { .pr_domain = &inet6domain, 370 .pr_protocol = IPPROTO_IPV6, 371 .pr_slowtimo = ip6flow_slowtimo, 372 .pr_init = ip6flow_poolinit, 373 }, 374 #endif /* GATEWAY */ 375 { .pr_type = SOCK_RAW, 376 .pr_domain = &inet6domain, 377 .pr_protocol = IPPROTO_DSTOPTS, 378 .pr_flags = PR_ATOMIC|PR_ADDR, 379 .pr_input = dest6_input, 380 }, 381 { .pr_type = SOCK_RAW, 382 .pr_domain = &inet6domain, 383 .pr_protocol = IPPROTO_ROUTING, 384 .pr_flags = PR_ATOMIC|PR_ADDR, 385 .pr_input = route6_input, 386 }, 387 { .pr_type = SOCK_RAW, 388 .pr_domain = &inet6domain, 389 .pr_protocol = IPPROTO_FRAGMENT, 390 .pr_flags = PR_ATOMIC|PR_ADDR, 391 .pr_input = frag6_input, 392 }, 393 #ifdef IPSEC 394 { .pr_type = SOCK_RAW, 395 .pr_domain = &inet6domain, 396 .pr_protocol = IPPROTO_AH, 397 .pr_flags = PR_ATOMIC|PR_ADDR, 398 .pr_input = ipsec6_common_input, 399 .pr_ctlinput = ah6_ctlinput, 400 }, 401 { .pr_type = SOCK_RAW, 402 .pr_domain = &inet6domain, 403 .pr_protocol = IPPROTO_ESP, 404 .pr_flags = PR_ATOMIC|PR_ADDR, 405 .pr_input = ipsec6_common_input, 406 .pr_ctlinput = esp6_ctlinput, 407 }, 408 { .pr_type = SOCK_RAW, 409 .pr_domain = &inet6domain, 410 .pr_protocol = IPPROTO_IPCOMP, 411 .pr_flags = PR_ATOMIC|PR_ADDR, 412 .pr_input = ipsec6_common_input, 413 }, 414 #endif /* IPSEC */ 415 #ifdef INET 416 { .pr_type = SOCK_RAW, 417 .pr_domain = &inet6domain, 418 .pr_protocol = IPPROTO_IPV4, 419 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 420 .pr_input = encap6_input, 421 .pr_ctlinput = encap6_ctlinput, 422 .pr_ctloutput = rip6_ctloutput, 423 .pr_usrreqs = &rip6_usrreqs, 424 .pr_init = encap_init, 425 }, 426 #endif 427 { .pr_type = SOCK_RAW, 428 .pr_domain = &inet6domain, 429 .pr_protocol = IPPROTO_IPV6, 430 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 431 .pr_input = encap6_input, 432 .pr_ctlinput = encap6_ctlinput, 433 .pr_ctloutput = rip6_ctloutput, 434 .pr_usrreqs = &rip6_usrreqs, 435 .pr_init = encap_init, 436 }, 437 #if NETHERIP > 0 438 { .pr_type = SOCK_RAW, 439 .pr_domain = &inet6domain, 440 .pr_protocol = IPPROTO_ETHERIP, 441 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 442 .pr_input = ip6_etherip_input, 443 .pr_ctlinput = rip6_ctlinput, 444 .pr_ctloutput = rip6_ctloutput, 445 .pr_usrreqs = &rip6_usrreqs, 446 }, 447 #endif 448 #if NCARP > 0 449 { .pr_type = SOCK_RAW, 450 .pr_domain = &inet6domain, 451 .pr_protocol = IPPROTO_CARP, 452 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 453 .pr_input = carp6_proto_input, 454 .pr_ctloutput = rip6_ctloutput, 455 .pr_usrreqs = &rip6_usrreqs, 456 }, 457 #endif /* NCARP */ 458 { .pr_type = SOCK_RAW, 459 .pr_domain = &inet6domain, 460 .pr_protocol = IPPROTO_L2TP, 461 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 462 .pr_input = encap6_input, 463 .pr_ctlinput = rip6_ctlinput, 464 .pr_ctloutput = rip6_ctloutput, 465 .pr_usrreqs = &rip6_usrreqs, 466 .pr_init = encap_init, 467 }, 468 { .pr_type = SOCK_RAW, 469 .pr_domain = &inet6domain, 470 .pr_protocol = IPPROTO_PIM, 471 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 472 .pr_input = pim6_input, 473 .pr_ctloutput = rip6_ctloutput, 474 .pr_usrreqs = &rip6_usrreqs, 475 .pr_init = pim6_init, 476 }, 477 /* raw wildcard */ 478 { .pr_type = SOCK_RAW, 479 .pr_domain = &inet6domain, 480 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 481 .pr_input = rip6_input, 482 .pr_ctloutput = rip6_ctloutput, 483 .pr_usrreqs = &rip6_usrreqs, 484 .pr_init = rip6_init, 485 }, 486 }; 487 488 static const struct sockaddr_in6 in6_any = { 489 .sin6_len = sizeof(in6_any) 490 , .sin6_family = AF_INET6 491 , .sin6_port = 0 492 , .sin6_flowinfo = 0 493 , .sin6_addr = IN6ADDR_ANY_INIT 494 , .sin6_scope_id = 0 495 }; 496 497 bool in6_present = false; 498 static void 499 in6_dom_init(void) 500 { 501 502 in6_present = true; 503 } 504 505 struct domain inet6domain = { 506 .dom_family = AF_INET6, .dom_name = "internet6", 507 .dom_init = in6_dom_init, .dom_externalize = NULL, .dom_dispose = NULL, 508 .dom_protosw = (const struct protosw *)inet6sw, 509 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 510 .dom_rtattach = rt_inithead, 511 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 512 .dom_maxrtkey = sizeof(struct ip_pack6), 513 .dom_if_up = in6_if_up, .dom_if_down = in6_if_down, 514 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 515 .dom_if_link_state_change = in6_if_link_state_change, 516 .dom_ifqueues = { NULL, NULL }, 517 .dom_link = { NULL }, 518 .dom_mowner = MOWNER_INIT("",""), 519 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 520 .dom_sa_cmplen = sizeof(struct in6_addr), 521 .dom_sa_any = (const struct sockaddr *)&in6_any, 522 .dom_sockaddr_externalize = sockaddr_in6_externalize, 523 }; 524 525 #if 0 526 int 527 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 528 { 529 uint_fast8_t len; 530 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 531 addrend = addrofs + sizeof(struct in6_addr); 532 int rc; 533 const struct sockaddr_in6 *lsin6, *rsin6; 534 535 lsin6 = satocsin6(lsa); 536 rsin6 = satocsin6(rsa); 537 538 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 539 540 if (len > addrofs && 541 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 542 len - addrofs)) != 0) 543 return rc; 544 545 return lsin6->sin6_len - rsin6->sin6_len; 546 } 547 #endif 548 549 /* 550 * Internet configuration info 551 */ 552 #ifdef GATEWAY6 553 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 554 #else 555 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 556 #endif 557 558 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 559 int ip6_sendredirects = 1; 560 int ip6_defhlim = IPV6_DEFHLIM; 561 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 562 int ip6_accept_rtadv = 0; 563 int ip6_maxfragpackets = 200; 564 int ip6_maxfrags = 200; 565 int ip6_log_interval = 5; 566 int ip6_hdrnestlimit = 15; 567 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 568 int ip6_auto_flowlabel = 1; 569 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 570 int ip6_rr_prune = 5; /* router renumbering prefix 571 * walk list every 5 sec. */ 572 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 573 int ip6_v6only = 1; 574 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 575 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 576 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 577 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 578 579 int ip6_keepfaith = 0; 580 time_t ip6_log_time = 0; 581 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 582 * routes via rtadv expected to be 583 * significantly larger than common use. 584 * if you need to count: 3 extra initial 585 * routes, plus 1 per interface after the 586 * first one, then one per non-linklocal 587 * prefix */ 588 589 /* icmp6 */ 590 int pmtu_expire = 60*10; 591 592 /* raw IP6 parameters */ 593 /* 594 * Nominal space allocated to a raw ip socket. 595 */ 596 #define RIPV6SNDQ 8192 597 #define RIPV6RCVQ 16384 598 599 u_long rip6_sendspace = RIPV6SNDQ; 600 u_long rip6_recvspace = RIPV6RCVQ; 601 602 /* ICMPV6 parameters */ 603 int icmp6_rediraccept = 1; /* accept and process redirects */ 604 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 605 int icmp6errppslim = 100; /* 100pps */ 606 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 607
Indexes created Tue Sep 23 02:09:52 GMT 2025