in6_proto.c revision 1.109
1 /* $NetBSD: in6_proto.c,v 1.109 2016/01/21 15:27:48 riastradh 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 1.109 2016/01/21 15:27:48 riastradh 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 #endif 74 75 #include <sys/param.h> 76 #include <sys/socket.h> 77 #include <sys/protosw.h> 78 #include <sys/kernel.h> 79 #include <sys/domain.h> 80 #include <sys/mbuf.h> 81 82 #include <net/if.h> 83 #include <net/radix.h> 84 #include <net/route.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/in_var.h> 89 #include <netinet/ip_encap.h> 90 #include <netinet/ip.h> 91 #include <netinet/ip_var.h> 92 #include <netinet/in_pcb.h> 93 #include <netinet/ip6.h> 94 #include <netinet6/ip6_var.h> 95 #include <netinet/icmp6.h> 96 #include <netinet6/in6_pcb.h> 97 98 #include <netinet/tcp.h> 99 #include <netinet/tcp_fsm.h> 100 #include <netinet/tcp_seq.h> 101 #include <netinet/tcp_timer.h> 102 #include <netinet/tcp_var.h> 103 #include <netinet/tcpip.h> 104 #include <netinet/tcp_debug.h> 105 106 #include <netinet6/udp6.h> 107 #include <netinet6/udp6_var.h> 108 109 #ifdef DCCP 110 #include <netinet/dccp.h> 111 #include <netinet/dccp_var.h> 112 #include <netinet6/dccp6_var.h> 113 #endif 114 115 #ifdef SCTP 116 #include <netinet/sctp_pcb.h> 117 #include <netinet/sctp.h> 118 #include <netinet/sctp_var.h> 119 #include <netinet6/sctp6_var.h> 120 #endif 121 122 #include <netinet6/pim6_var.h> 123 124 #include <netinet6/nd6.h> 125 126 #ifdef IPSEC 127 #include <netipsec/ipsec.h> 128 #include <netipsec/ipsec6.h> 129 #include <netipsec/key.h> 130 #endif /* IPSEC */ 131 132 133 #include "carp.h" 134 #if NCARP > 0 135 #include <netinet/ip_carp.h> 136 #endif 137 138 #include "etherip.h" 139 #if NETHERIP > 0 140 #include <netinet6/ip6_etherip.h> 141 #endif 142 143 #include <netinet6/ip6protosw.h> 144 145 #include <net/net_osdep.h> 146 147 /* 148 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 149 */ 150 151 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 152 153 /* Wrappers to acquire kernel_lock. */ 154 155 PR_WRAP_CTLINPUT(rip6_ctlinput) 156 PR_WRAP_CTLINPUT(encap6_ctlinput) 157 PR_WRAP_CTLINPUT(udp6_ctlinput) 158 PR_WRAP_CTLINPUT(tcp6_ctlinput) 159 160 #define rip6_ctlinput rip6_ctlinput_wrapper 161 #define encap6_ctlinput encap6_ctlinput_wrapper 162 #define udp6_ctlinput udp6_ctlinput_wrapper 163 #define tcp6_ctlinput tcp6_ctlinput_wrapper 164 165 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 166 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 167 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 168 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 169 170 #define rip6_ctloutput rip6_ctloutput_wrapper 171 #define tcp_ctloutput tcp_ctloutput_wrapper 172 #define udp6_ctloutput udp6_ctloutput_wrapper 173 #define icmp6_ctloutput icmp6_ctloutput_wrapper 174 175 #if defined(DCCP) 176 PR_WRAP_CTLINPUT(dccp6_ctlinput) 177 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 178 179 #define dccp6_ctlinput dccp6_ctlinput_wrapper 180 #define dccp_ctloutput dccp_ctloutput_wrapper 181 #endif 182 183 #if defined(SCTP) 184 PR_WRAP_CTLINPUT(sctp6_ctlinput) 185 PR_WRAP_CTLOUTPUT(sctp_ctloutput) 186 187 #define sctp6_ctlinput sctp6_ctlinput_wrapper 188 #define sctp_ctloutput sctp_ctloutput_wrapper 189 #endif 190 191 #if defined(IPSEC) 192 PR_WRAP_CTLINPUT(ah6_ctlinput) 193 194 #define ah6_ctlinput ah6_ctlinput_wrapper 195 #endif 196 197 #if defined(IPSEC) 198 PR_WRAP_CTLINPUT(esp6_ctlinput) 199 200 #define esp6_ctlinput esp6_ctlinput_wrapper 201 #endif 202 203 static void 204 tcp6_init(void) 205 { 206 207 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 208 209 tcp_init_common(sizeof(struct ip6_hdr)); 210 } 211 212 const struct ip6protosw inet6sw[] = { 213 { 214 .ip6pr_protosw = { 215 .pr_domain = &inet6domain, 216 .pr_protocol = IPPROTO_IPV6, 217 .pr_init = ip6_init, 218 .pr_fasttimo = frag6_fasttimo, 219 .pr_slowtimo = frag6_slowtimo, 220 .pr_drain = frag6_drainstub, 221 }, 222 }, 223 { 224 .ip6pr_protosw = { 225 .pr_type = SOCK_DGRAM, 226 .pr_domain = &inet6domain, 227 .pr_protocol = IPPROTO_UDP, 228 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 229 .pr_ctlinput = udp6_ctlinput, 230 .pr_ctloutput = udp6_ctloutput, 231 .pr_usrreqs = &udp6_usrreqs, 232 .pr_init = udp6_init, 233 }, 234 .ip6pr_input = udp6_input, 235 }, 236 { 237 .ip6pr_protosw = { 238 .pr_type = SOCK_STREAM, 239 .pr_domain = &inet6domain, 240 .pr_protocol = IPPROTO_TCP, 241 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 242 .pr_ctlinput = tcp6_ctlinput, 243 .pr_ctloutput = tcp_ctloutput, 244 .pr_usrreqs = &tcp_usrreqs, 245 .pr_init = tcp6_init, 246 .pr_fasttimo = tcp_fasttimo, 247 .pr_drain = tcp_drainstub, 248 }, 249 .ip6pr_input = tcp6_input, 250 }, 251 #ifdef DCCP 252 { 253 .ip6pr_protosw = { 254 .pr_type = SOCK_CONN_DGRAM, 255 .pr_domain = &inet6domain, 256 .pr_protocol = IPPROTO_DCCP, 257 .pr_flags = PR_CONNREQUIRED|PR_ATOMIC|PR_LISTEN, 258 .pr_ctlinput = dccp6_ctlinput, 259 .pr_ctloutput = dccp_ctloutput, 260 .pr_usrreqs = &dccp6_usrreqs, 261 #ifndef INET 262 .pr_init = dccp_init, 263 #endif 264 }, 265 .ip6pr_input = dccp6_input, 266 }, 267 #endif /* DCCP */ 268 #ifdef SCTP 269 { 270 .ip6pr_protosw = { 271 .pr_type = SOCK_DGRAM, 272 .pr_domain = &inet6domain, 273 .pr_protocol = IPPROTO_SCTP, 274 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 275 .pr_ctlinput = sctp6_ctlinput, 276 .pr_ctloutput = sctp_ctloutput, 277 .pr_usrreqs = &sctp6_usrreqs, 278 .pr_drain = sctp_drain, 279 }, 280 .ip6pr_input = sctp6_input, 281 }, 282 { 283 .ip6pr_protosw = { 284 .pr_type = SOCK_SEQPACKET, 285 .pr_domain = &inet6domain, 286 .pr_protocol = IPPROTO_SCTP, 287 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 288 .pr_ctlinput = sctp6_ctlinput, 289 .pr_ctloutput = sctp_ctloutput, 290 .pr_drain = sctp_drain, 291 }, 292 .ip6pr_input = sctp6_input, 293 }, 294 { 295 .ip6pr_protosw = { 296 .pr_type = SOCK_STREAM, 297 .pr_domain = &inet6domain, 298 .pr_protocol = IPPROTO_SCTP, 299 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, 300 .pr_ctlinput = sctp6_ctlinput, 301 .pr_ctloutput = sctp_ctloutput, 302 .pr_drain = sctp_drain, 303 }, 304 .ip6pr_input = sctp6_input, 305 }, 306 #endif /* SCTP */ 307 { 308 .ip6pr_protosw = { 309 .pr_type = SOCK_RAW, 310 .pr_domain = &inet6domain, 311 .pr_protocol = IPPROTO_RAW, 312 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 313 .pr_ctlinput = rip6_ctlinput, 314 .pr_ctloutput = rip6_ctloutput, 315 .pr_usrreqs = &rip6_usrreqs, 316 }, 317 .ip6pr_input = rip6_input, 318 }, 319 #ifdef GATEWAY 320 { 321 .ip6pr_protosw = { 322 .pr_domain = &inet6domain, 323 .pr_protocol = IPPROTO_IPV6, 324 .pr_slowtimo = ip6flow_slowtimo, 325 .pr_init = ip6flow_poolinit, 326 }, 327 }, 328 #endif /* GATEWAY */ 329 { 330 .ip6pr_protosw = { 331 .pr_type = SOCK_RAW, 332 .pr_domain = &inet6domain, 333 .pr_protocol = IPPROTO_ICMPV6, 334 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 335 .pr_ctlinput = rip6_ctlinput, 336 .pr_ctloutput = icmp6_ctloutput, 337 .pr_usrreqs = &rip6_usrreqs, 338 .pr_init = icmp6_init, 339 }, 340 .ip6pr_input = icmp6_input, 341 }, 342 { 343 .ip6pr_protosw = { 344 .pr_type = SOCK_RAW, 345 .pr_domain = &inet6domain, 346 .pr_protocol = IPPROTO_DSTOPTS, 347 .pr_flags = PR_ATOMIC|PR_ADDR, 348 }, 349 .ip6pr_input = dest6_input, 350 }, 351 { 352 .ip6pr_protosw = { 353 .pr_type = SOCK_RAW, 354 .pr_domain = &inet6domain, 355 .pr_protocol = IPPROTO_ROUTING, 356 .pr_flags = PR_ATOMIC|PR_ADDR, 357 }, 358 .ip6pr_input = route6_input, 359 }, 360 { 361 .ip6pr_protosw = { 362 .pr_type = SOCK_RAW, 363 .pr_domain = &inet6domain, 364 .pr_protocol = IPPROTO_FRAGMENT, 365 .pr_flags = PR_ATOMIC|PR_ADDR, 366 }, 367 .ip6pr_input = frag6_input, 368 }, 369 #ifdef IPSEC 370 { 371 .ip6pr_protosw = { 372 .pr_type = SOCK_RAW, 373 .pr_domain = &inet6domain, 374 .pr_protocol = IPPROTO_AH, 375 .pr_flags = PR_ATOMIC|PR_ADDR, 376 .pr_ctlinput = ah6_ctlinput, 377 }, 378 .ip6pr_input = ipsec6_common_input, 379 }, 380 { 381 .ip6pr_protosw = { 382 .pr_type = SOCK_RAW, 383 .pr_domain = &inet6domain, 384 .pr_protocol = IPPROTO_ESP, 385 .pr_flags = PR_ATOMIC|PR_ADDR, 386 .pr_ctlinput = esp6_ctlinput, 387 }, 388 .ip6pr_input = ipsec6_common_input, 389 }, 390 { 391 .ip6pr_protosw = { 392 .pr_type = SOCK_RAW, 393 .pr_domain = &inet6domain, 394 .pr_protocol = IPPROTO_IPCOMP, 395 .pr_flags = PR_ATOMIC|PR_ADDR, 396 }, 397 .ip6pr_input = ipsec6_common_input, 398 }, 399 #endif /* IPSEC */ 400 #ifdef INET 401 { 402 .ip6pr_protosw = { 403 .pr_type = SOCK_RAW, 404 .pr_domain = &inet6domain, 405 .pr_protocol = IPPROTO_IPV4, 406 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 407 .pr_ctlinput = encap6_ctlinput, 408 .pr_ctloutput = rip6_ctloutput, 409 .pr_usrreqs = &rip6_usrreqs, 410 .pr_init = encap_init, 411 }, 412 .ip6pr_input = encap6_input, 413 }, 414 #endif 415 { 416 .ip6pr_protosw = { 417 .pr_type = SOCK_RAW, 418 .pr_domain = &inet6domain, 419 .pr_protocol = IPPROTO_IPV6, 420 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 421 .pr_ctlinput = encap6_ctlinput, 422 .pr_ctloutput = rip6_ctloutput, 423 .pr_usrreqs = &rip6_usrreqs, 424 .pr_init = encap_init, 425 }, 426 .ip6pr_input = encap6_input, 427 }, 428 #if NETHERIP > 0 429 { 430 .ip6pr_protosw = { 431 .pr_type = SOCK_RAW, 432 .pr_domain = &inet6domain, 433 .pr_protocol = IPPROTO_ETHERIP, 434 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 435 .pr_ctlinput = rip6_ctlinput, 436 .pr_ctloutput = rip6_ctloutput, 437 .pr_usrreqs = &rip6_usrreqs, 438 }, 439 .ip6pr_input = ip6_etherip_input, 440 }, 441 #endif 442 #if NCARP > 0 443 { 444 .ip6pr_protosw = { 445 .pr_type = SOCK_RAW, 446 .pr_domain = &inet6domain, 447 .pr_protocol = IPPROTO_CARP, 448 .pr_flags = PR_ATOMIC|PR_ADDR, 449 .pr_ctloutput = rip6_ctloutput, 450 .pr_usrreqs = &rip6_usrreqs, 451 }, 452 .ip6pr_input = carp6_proto_input, 453 }, 454 #endif /* NCARP */ 455 { 456 .ip6pr_protosw = { 457 .pr_type = SOCK_RAW, 458 .pr_domain = &inet6domain, 459 .pr_protocol = IPPROTO_PIM, 460 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 461 .pr_ctloutput = rip6_ctloutput, 462 .pr_usrreqs = &rip6_usrreqs, 463 .pr_init = pim6_init, 464 }, 465 .ip6pr_input = pim6_input, 466 }, 467 /* raw wildcard */ 468 { 469 .ip6pr_protosw = { 470 .pr_type = SOCK_RAW, 471 .pr_domain = &inet6domain, 472 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 473 .pr_ctloutput = rip6_ctloutput, 474 .pr_usrreqs = &rip6_usrreqs, 475 .pr_init = rip6_init, 476 }, 477 .ip6pr_input = rip6_input, 478 }, 479 }; 480 481 static const struct sockaddr_in6 in6_any = { 482 .sin6_len = sizeof(in6_any) 483 , .sin6_family = AF_INET6 484 , .sin6_port = 0 485 , .sin6_flowinfo = 0 486 , .sin6_addr = IN6ADDR_ANY_INIT 487 , .sin6_scope_id = 0 488 }; 489 490 bool in6_present = false; 491 static void 492 in6_init(void) 493 { 494 495 in6_present = true; 496 } 497 498 struct domain inet6domain = { 499 .dom_family = AF_INET6, .dom_name = "internet6", 500 .dom_init = in6_init, .dom_externalize = NULL, .dom_dispose = NULL, 501 .dom_protosw = (const struct protosw *)inet6sw, 502 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 503 .dom_rtattach = rt_inithead, 504 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 505 .dom_maxrtkey = sizeof(struct ip_pack6), 506 .dom_if_up = in6_if_up, .dom_if_down = in6_if_down, 507 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 508 .dom_if_link_state_change = in6_if_link_state_change, 509 .dom_ifqueues = { NULL, NULL }, 510 .dom_link = { NULL }, 511 .dom_mowner = MOWNER_INIT("",""), 512 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 513 .dom_sa_cmplen = sizeof(struct in6_addr), 514 .dom_sa_any = (const struct sockaddr *)&in6_any, 515 .dom_sockaddr_externalize = sockaddr_in6_externalize, 516 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 517 }; 518 519 #if 0 520 int 521 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 522 { 523 uint_fast8_t len; 524 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 525 addrend = addrofs + sizeof(struct in6_addr); 526 int rc; 527 const struct sockaddr_in6 *lsin6, *rsin6; 528 529 lsin6 = satocsin6(lsa); 530 rsin6 = satocsin6(rsa); 531 532 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 533 534 if (len > addrofs && 535 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 536 len - addrofs)) != 0) 537 return rc; 538 539 return lsin6->sin6_len - rsin6->sin6_len; 540 } 541 #endif 542 543 /* 544 * Internet configuration info 545 */ 546 #ifndef IPV6FORWARDING 547 #ifdef GATEWAY6 548 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 549 #else 550 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 551 #endif /* GATEWAY6 */ 552 #endif /* !IPV6FORWARDING */ 553 554 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 555 int ip6_sendredirects = 1; 556 int ip6_defhlim = IPV6_DEFHLIM; 557 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 558 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 559 int ip6_maxfragpackets = 200; 560 int ip6_maxfrags = 200; 561 int ip6_log_interval = 5; 562 int ip6_hdrnestlimit = 50; /* appropriate? */ 563 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 564 int ip6_auto_flowlabel = 1; 565 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 566 int ip6_rr_prune = 5; /* router renumbering prefix 567 * walk list every 5 sec. */ 568 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 569 int ip6_v6only = 1; 570 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 571 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 572 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 573 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 574 575 int ip6_keepfaith = 0; 576 time_t ip6_log_time = 0; 577 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 578 * routes via rtadv expected to be 579 * significantly larger than common use. 580 * if you need to count: 3 extra initial 581 * routes, plus 1 per interface after the 582 * first one, then one per non-linklocal 583 * prefix */ 584 585 /* icmp6 */ 586 /* 587 * BSDI4 defines these variables in in_proto.c... 588 * XXX: what if we don't define INET? Should we define pmtu6_expire 589 * or so? (jinmei (at) kame.net 19990310) 590 */ 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 Sep 29 21:09:56 GMT 2025