in6_proto.c revision 1.123
1 /* $NetBSD: in6_proto.c,v 1.123 2018/05/03 06:41:30 maxv 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 1.123 2018/05/03 06:41:30 maxv 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 128 129 #include "carp.h" 130 #if NCARP > 0 131 #include <netinet/ip_carp.h> 132 #endif 133 134 #include "etherip.h" 135 #if NETHERIP > 0 136 #include <netinet6/ip6_etherip.h> 137 #endif 138 139 #include <netinet6/ip6protosw.h> 140 141 /* 142 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 143 */ 144 145 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 146 147 /* Wrappers to acquire kernel_lock. */ 148 149 PR_WRAP_CTLINPUT(rip6_ctlinput) 150 PR_WRAP_CTLINPUT(encap6_ctlinput) 151 PR_WRAP_CTLINPUT(udp6_ctlinput) 152 PR_WRAP_CTLINPUT(tcp6_ctlinput) 153 154 #define rip6_ctlinput rip6_ctlinput_wrapper 155 #define encap6_ctlinput encap6_ctlinput_wrapper 156 #define udp6_ctlinput udp6_ctlinput_wrapper 157 #define tcp6_ctlinput tcp6_ctlinput_wrapper 158 159 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 160 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 161 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 162 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 163 164 #define rip6_ctloutput rip6_ctloutput_wrapper 165 #define tcp_ctloutput tcp_ctloutput_wrapper 166 #define udp6_ctloutput udp6_ctloutput_wrapper 167 #define icmp6_ctloutput icmp6_ctloutput_wrapper 168 169 #if defined(DCCP) 170 PR_WRAP_CTLINPUT(dccp6_ctlinput) 171 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 172 173 #define dccp6_ctlinput dccp6_ctlinput_wrapper 174 #define dccp_ctloutput dccp_ctloutput_wrapper 175 #endif 176 177 #if defined(SCTP) 178 PR_WRAP_CTLINPUT(sctp6_ctlinput) 179 PR_WRAP_CTLOUTPUT(sctp_ctloutput) 180 181 #define sctp6_ctlinput sctp6_ctlinput_wrapper 182 #define sctp_ctloutput sctp_ctloutput_wrapper 183 #endif 184 185 #ifdef NET_MPSAFE 186 PR_WRAP_INPUT6(udp6_input) 187 PR_WRAP_INPUT6(tcp6_input) 188 #ifdef DCCP 189 PR_WRAP_INPUT6(dccp6_input) 190 #endif 191 #ifdef SCTP 192 PR_WRAP_INPUT6(sctp6_input) 193 #endif 194 PR_WRAP_INPUT6(rip6_input) 195 PR_WRAP_INPUT6(dest6_input) 196 PR_WRAP_INPUT6(route6_input) 197 PR_WRAP_INPUT6(frag6_input) 198 #if NETHERIP > 0 199 PR_WRAP_INPUT6(ip6_etherip_input) 200 #endif 201 #if NPFSYNC > 0 202 PR_WRAP_INPUT6(pfsync_input) 203 #endif 204 PR_WRAP_INPUT6(pim6_input) 205 206 #define udp6_input udp6_input_wrapper 207 #define tcp6_input tcp6_input_wrapper 208 #define dccp6_input dccp6_input_wrapper 209 #define sctp6_input sctp6_input_wrapper 210 #define rip6_input rip6_input_wrapper 211 #define dest6_input dest6_input_wrapper 212 #define route6_input route6_input_wrapper 213 #define frag6_input frag6_input_wrapper 214 #define ip6_etherip_input ip6_etherip_input_wrapper 215 #define pim6_input pim6_input_wrapper 216 #endif 217 218 #if defined(IPSEC) 219 220 #ifdef IPSEC_RUMPKERNEL 221 /* 222 * .pr_input = ipsec6_common_input won't be resolved on loading 223 * the ipsec shared library. We need a wrapper anyway. 224 */ 225 static int 226 ipsec6_common_input_wrapper(struct mbuf **mp, int *offp, int proto) 227 { 228 229 if (ipsec_enabled) { 230 return ipsec6_common_input(mp, offp, proto); 231 } else { 232 m_freem(*mp); 233 return IPPROTO_DONE; 234 } 235 } 236 #define ipsec6_common_input ipsec6_common_input_wrapper 237 238 /* The ctlinput functions may not be loaded */ 239 #define IPSEC_WRAP_CTLINPUT(name) \ 240 static void * \ 241 name##_wrapper(int a, const struct sockaddr *b, void *c)\ 242 { \ 243 void *rv; \ 244 KERNEL_LOCK(1, NULL); \ 245 if (ipsec_enabled) \ 246 rv = name(a, b, c); \ 247 else \ 248 rv = NULL; \ 249 KERNEL_UNLOCK_ONE(NULL); \ 250 return rv; \ 251 } 252 IPSEC_WRAP_CTLINPUT(ah6_ctlinput) 253 IPSEC_WRAP_CTLINPUT(esp6_ctlinput) 254 255 #else /* !IPSEC_RUMPKERNEL */ 256 257 PR_WRAP_CTLINPUT(ah6_ctlinput) 258 PR_WRAP_CTLINPUT(esp6_ctlinput) 259 260 #endif /* !IPSEC_RUMPKERNEL */ 261 262 #define ah6_ctlinput ah6_ctlinput_wrapper 263 #define esp6_ctlinput esp6_ctlinput_wrapper 264 265 #endif /* IPSEC */ 266 267 static void 268 tcp6_init(void) 269 { 270 271 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 272 273 tcp_init_common(sizeof(struct ip6_hdr)); 274 } 275 276 const struct ip6protosw inet6sw[] = { 277 { .pr_domain = &inet6domain, 278 .pr_protocol = IPPROTO_IPV6, 279 .pr_init = ip6_init, 280 .pr_fasttimo = frag6_fasttimo, 281 .pr_slowtimo = frag6_slowtimo, 282 .pr_drain = frag6_drainstub, 283 }, 284 { .pr_type = SOCK_RAW, 285 .pr_domain = &inet6domain, 286 .pr_protocol = IPPROTO_ICMPV6, 287 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 288 .pr_input = icmp6_input, 289 .pr_ctlinput = rip6_ctlinput, 290 .pr_ctloutput = icmp6_ctloutput, 291 .pr_usrreqs = &rip6_usrreqs, 292 .pr_init = icmp6_init, 293 }, 294 { .pr_type = SOCK_DGRAM, 295 .pr_domain = &inet6domain, 296 .pr_protocol = IPPROTO_UDP, 297 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 298 .pr_input = udp6_input, 299 .pr_ctlinput = udp6_ctlinput, 300 .pr_ctloutput = udp6_ctloutput, 301 .pr_usrreqs = &udp6_usrreqs, 302 .pr_init = udp6_init, 303 }, 304 { .pr_type = SOCK_STREAM, 305 .pr_domain = &inet6domain, 306 .pr_protocol = IPPROTO_TCP, 307 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 308 .pr_input = tcp6_input, 309 .pr_ctlinput = tcp6_ctlinput, 310 .pr_ctloutput = tcp_ctloutput, 311 .pr_usrreqs = &tcp_usrreqs, 312 .pr_init = tcp6_init, 313 .pr_fasttimo = tcp_fasttimo, 314 .pr_drain = tcp_drainstub, 315 }, 316 #ifdef DCCP 317 { .pr_type = SOCK_CONN_DGRAM, 318 .pr_domain = &inet6domain, 319 .pr_protocol = IPPROTO_DCCP, 320 .pr_flags = PR_CONNREQUIRED|PR_ATOMIC|PR_LISTEN, 321 .pr_input = dccp6_input, 322 .pr_ctlinput = dccp6_ctlinput, 323 .pr_ctloutput = dccp_ctloutput, 324 .pr_usrreqs = &dccp6_usrreqs, 325 #ifndef INET 326 .pr_init = dccp_init, 327 #endif 328 }, 329 #endif /* DCCP */ 330 #ifdef SCTP 331 { .pr_type = SOCK_DGRAM, 332 .pr_domain = &inet6domain, 333 .pr_protocol = IPPROTO_SCTP, 334 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 335 .pr_input = sctp6_input, 336 .pr_ctlinput = sctp6_ctlinput, 337 .pr_ctloutput = sctp_ctloutput, 338 .pr_usrreqs = &sctp6_usrreqs, 339 .pr_drain = sctp_drain, 340 }, 341 { .pr_type = SOCK_SEQPACKET, 342 .pr_domain = &inet6domain, 343 .pr_protocol = IPPROTO_SCTP, 344 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 345 .pr_input = sctp6_input, 346 .pr_ctlinput = sctp6_ctlinput, 347 .pr_ctloutput = sctp_ctloutput, 348 .pr_drain = sctp_drain, 349 }, 350 { .pr_type = SOCK_STREAM, 351 .pr_domain = &inet6domain, 352 .pr_protocol = IPPROTO_SCTP, 353 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, 354 .pr_input = sctp6_input, 355 .pr_ctlinput = sctp6_ctlinput, 356 .pr_ctloutput = sctp_ctloutput, 357 .pr_drain = sctp_drain, 358 }, 359 #endif /* SCTP */ 360 { .pr_type = SOCK_RAW, 361 .pr_domain = &inet6domain, 362 .pr_protocol = IPPROTO_RAW, 363 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 364 .pr_input = rip6_input, 365 .pr_ctlinput = rip6_ctlinput, 366 .pr_ctloutput = rip6_ctloutput, 367 .pr_usrreqs = &rip6_usrreqs, 368 }, 369 #ifdef GATEWAY 370 { .pr_domain = &inet6domain, 371 .pr_protocol = IPPROTO_IPV6, 372 .pr_slowtimo = ip6flow_slowtimo, 373 .pr_init = ip6flow_poolinit, 374 }, 375 #endif /* GATEWAY */ 376 { .pr_type = SOCK_RAW, 377 .pr_domain = &inet6domain, 378 .pr_protocol = IPPROTO_DSTOPTS, 379 .pr_flags = PR_ATOMIC|PR_ADDR, 380 .pr_input = dest6_input, 381 }, 382 { .pr_type = SOCK_RAW, 383 .pr_domain = &inet6domain, 384 .pr_protocol = IPPROTO_ROUTING, 385 .pr_flags = PR_ATOMIC|PR_ADDR, 386 .pr_input = route6_input, 387 }, 388 { .pr_type = SOCK_RAW, 389 .pr_domain = &inet6domain, 390 .pr_protocol = IPPROTO_FRAGMENT, 391 .pr_flags = PR_ATOMIC|PR_ADDR, 392 .pr_input = frag6_input, 393 }, 394 #ifdef IPSEC 395 { .pr_type = SOCK_RAW, 396 .pr_domain = &inet6domain, 397 .pr_protocol = IPPROTO_AH, 398 .pr_flags = PR_ATOMIC|PR_ADDR, 399 .pr_input = ipsec6_common_input, 400 .pr_ctlinput = ah6_ctlinput, 401 }, 402 { .pr_type = SOCK_RAW, 403 .pr_domain = &inet6domain, 404 .pr_protocol = IPPROTO_ESP, 405 .pr_flags = PR_ATOMIC|PR_ADDR, 406 .pr_input = ipsec6_common_input, 407 .pr_ctlinput = esp6_ctlinput, 408 }, 409 { .pr_type = SOCK_RAW, 410 .pr_domain = &inet6domain, 411 .pr_protocol = IPPROTO_IPCOMP, 412 .pr_flags = PR_ATOMIC|PR_ADDR, 413 .pr_input = ipsec6_common_input, 414 }, 415 #endif /* IPSEC */ 416 #ifdef INET 417 { .pr_type = SOCK_RAW, 418 .pr_domain = &inet6domain, 419 .pr_protocol = IPPROTO_IPV4, 420 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 421 .pr_input = encap6_input, 422 .pr_ctlinput = encap6_ctlinput, 423 .pr_ctloutput = rip6_ctloutput, 424 .pr_usrreqs = &rip6_usrreqs, 425 .pr_init = encap_init, 426 }, 427 #endif 428 { .pr_type = SOCK_RAW, 429 .pr_domain = &inet6domain, 430 .pr_protocol = IPPROTO_IPV6, 431 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 432 .pr_input = encap6_input, 433 .pr_ctlinput = encap6_ctlinput, 434 .pr_ctloutput = rip6_ctloutput, 435 .pr_usrreqs = &rip6_usrreqs, 436 .pr_init = encap_init, 437 }, 438 #if NETHERIP > 0 439 { .pr_type = SOCK_RAW, 440 .pr_domain = &inet6domain, 441 .pr_protocol = IPPROTO_ETHERIP, 442 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 443 .pr_input = ip6_etherip_input, 444 .pr_ctlinput = rip6_ctlinput, 445 .pr_ctloutput = rip6_ctloutput, 446 .pr_usrreqs = &rip6_usrreqs, 447 }, 448 #endif 449 #if NCARP > 0 450 { .pr_type = SOCK_RAW, 451 .pr_domain = &inet6domain, 452 .pr_protocol = IPPROTO_CARP, 453 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 454 .pr_input = carp6_proto_input, 455 .pr_ctloutput = rip6_ctloutput, 456 .pr_usrreqs = &rip6_usrreqs, 457 }, 458 #endif /* NCARP */ 459 { .pr_type = SOCK_RAW, 460 .pr_domain = &inet6domain, 461 .pr_protocol = IPPROTO_L2TP, 462 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 463 .pr_input = encap6_input, 464 .pr_ctlinput = rip6_ctlinput, 465 .pr_ctloutput = rip6_ctloutput, 466 .pr_usrreqs = &rip6_usrreqs, 467 .pr_init = encap_init, 468 }, 469 { .pr_type = SOCK_RAW, 470 .pr_domain = &inet6domain, 471 .pr_protocol = IPPROTO_PIM, 472 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 473 .pr_input = pim6_input, 474 .pr_ctloutput = rip6_ctloutput, 475 .pr_usrreqs = &rip6_usrreqs, 476 .pr_init = pim6_init, 477 }, 478 /* raw wildcard */ 479 { .pr_type = SOCK_RAW, 480 .pr_domain = &inet6domain, 481 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 482 .pr_input = rip6_input, 483 .pr_ctloutput = rip6_ctloutput, 484 .pr_usrreqs = &rip6_usrreqs, 485 .pr_init = rip6_init, 486 }, 487 }; 488 489 static const struct sockaddr_in6 in6_any = { 490 .sin6_len = sizeof(in6_any) 491 , .sin6_family = AF_INET6 492 , .sin6_port = 0 493 , .sin6_flowinfo = 0 494 , .sin6_addr = IN6ADDR_ANY_INIT 495 , .sin6_scope_id = 0 496 }; 497 498 bool in6_present = false; 499 static void 500 in6_dom_init(void) 501 { 502 503 in6_present = true; 504 } 505 506 struct domain inet6domain = { 507 .dom_family = AF_INET6, .dom_name = "internet6", 508 .dom_init = in6_dom_init, .dom_externalize = NULL, .dom_dispose = NULL, 509 .dom_protosw = (const struct protosw *)inet6sw, 510 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 511 .dom_rtattach = rt_inithead, 512 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 513 .dom_maxrtkey = sizeof(struct ip_pack6), 514 .dom_if_up = in6_if_up, .dom_if_down = in6_if_down, 515 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 516 .dom_if_link_state_change = in6_if_link_state_change, 517 .dom_ifqueues = { NULL, NULL }, 518 .dom_link = { NULL }, 519 .dom_mowner = MOWNER_INIT("",""), 520 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 521 .dom_sa_cmplen = sizeof(struct in6_addr), 522 .dom_sa_any = (const struct sockaddr *)&in6_any, 523 .dom_sockaddr_externalize = sockaddr_in6_externalize, 524 }; 525 526 #if 0 527 int 528 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 529 { 530 uint_fast8_t len; 531 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 532 addrend = addrofs + sizeof(struct in6_addr); 533 int rc; 534 const struct sockaddr_in6 *lsin6, *rsin6; 535 536 lsin6 = satocsin6(lsa); 537 rsin6 = satocsin6(rsa); 538 539 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 540 541 if (len > addrofs && 542 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 543 len - addrofs)) != 0) 544 return rc; 545 546 return lsin6->sin6_len - rsin6->sin6_len; 547 } 548 #endif 549 550 /* 551 * Internet configuration info 552 */ 553 #ifdef GATEWAY6 554 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 555 #else 556 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 557 #endif 558 559 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 560 int ip6_sendredirects = 1; 561 int ip6_defhlim = IPV6_DEFHLIM; 562 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 563 int ip6_accept_rtadv = 0; 564 int ip6_maxfragpackets = 200; 565 int ip6_maxfrags = 200; 566 int ip6_log_interval = 5; 567 int ip6_hdrnestlimit = 15; 568 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 569 int ip6_auto_flowlabel = 1; 570 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 571 int ip6_rr_prune = 5; /* router renumbering prefix 572 * walk list every 5 sec. */ 573 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 574 int ip6_v6only = 1; 575 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 576 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 577 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 578 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 579 580 int ip6_keepfaith = 0; 581 time_t ip6_log_time = 0; 582 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 583 * routes via rtadv expected to be 584 * significantly larger than common use. 585 * if you need to count: 3 extra initial 586 * routes, plus 1 per interface after the 587 * first one, then one per non-linklocal 588 * prefix */ 589 590 /* icmp6 */ 591 int pmtu_expire = 60*10; 592 593 /* raw IP6 parameters */ 594 /* 595 * Nominal space allocated to a raw ip socket. 596 */ 597 #define RIPV6SNDQ 8192 598 #define RIPV6RCVQ 8192 599 600 u_long rip6_sendspace = RIPV6SNDQ; 601 u_long rip6_recvspace = RIPV6RCVQ; 602 603 /* ICMPV6 parameters */ 604 int icmp6_rediraccept = 1; /* accept and process redirects */ 605 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 606 int icmp6errppslim = 100; /* 100pps */ 607 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 608
Indexes created Mon Oct 20 05:10:11 GMT 2025