1 /* $NetBSD: in6_proto.c,v 1.131 2024/02/09 22:08:37 andvar 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 1.131 2024/02/09 22:08:37 andvar 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 <netinet6/ip6protosw.h> 134 135 /* 136 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 137 */ 138 139 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 140 141 /* Wrappers to acquire kernel_lock. */ 142 143 PR_WRAP_CTLINPUT(rip6_ctlinput) 144 PR_WRAP_CTLINPUT(encap6_ctlinput) 145 PR_WRAP_CTLINPUT(udp6_ctlinput) 146 PR_WRAP_CTLINPUT(tcp6_ctlinput) 147 148 #define rip6_ctlinput rip6_ctlinput_wrapper 149 #define encap6_ctlinput encap6_ctlinput_wrapper 150 #define udp6_ctlinput udp6_ctlinput_wrapper 151 #define tcp6_ctlinput tcp6_ctlinput_wrapper 152 153 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 154 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 155 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 156 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 157 158 #define rip6_ctloutput rip6_ctloutput_wrapper 159 #define tcp_ctloutput tcp_ctloutput_wrapper 160 #define udp6_ctloutput udp6_ctloutput_wrapper 161 #define icmp6_ctloutput icmp6_ctloutput_wrapper 162 163 #if defined(DCCP) 164 PR_WRAP_CTLINPUT(dccp6_ctlinput) 165 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 166 167 #define dccp6_ctlinput dccp6_ctlinput_wrapper 168 #define dccp_ctloutput dccp_ctloutput_wrapper 169 #endif 170 171 #if defined(SCTP) 172 PR_WRAP_CTLINPUT(sctp6_ctlinput) 173 PR_WRAP_CTLOUTPUT(sctp_ctloutput) 174 175 #define sctp6_ctlinput sctp6_ctlinput_wrapper 176 #define sctp_ctloutput sctp_ctloutput_wrapper 177 #endif 178 179 #ifdef NET_MPSAFE 180 PR_WRAP_INPUT6(udp6_input) 181 PR_WRAP_INPUT6(tcp6_input) 182 #ifdef DCCP 183 PR_WRAP_INPUT6(dccp6_input) 184 #endif 185 #ifdef SCTP 186 PR_WRAP_INPUT6(sctp6_input) 187 #endif 188 PR_WRAP_INPUT6(rip6_input) 189 PR_WRAP_INPUT6(dest6_input) 190 PR_WRAP_INPUT6(route6_input) 191 PR_WRAP_INPUT6(frag6_input) 192 #if NPFSYNC > 0 193 PR_WRAP_INPUT6(pfsync_input) 194 #endif 195 PR_WRAP_INPUT6(pim6_input) 196 197 #define udp6_input udp6_input_wrapper 198 #define tcp6_input tcp6_input_wrapper 199 #define dccp6_input dccp6_input_wrapper 200 #define sctp6_input sctp6_input_wrapper 201 #define rip6_input rip6_input_wrapper 202 #define dest6_input dest6_input_wrapper 203 #define route6_input route6_input_wrapper 204 #define frag6_input frag6_input_wrapper 205 #define pim6_input pim6_input_wrapper 206 #endif 207 208 #if defined(IPSEC) 209 210 #ifdef IPSEC_RUMPKERNEL 211 /* 212 * .pr_input = ipsec6_common_input won't be resolved on loading 213 * the ipsec shared library. We need a wrapper anyway. 214 */ 215 static int 216 ipsec6_common_input_wrapper(struct mbuf **mp, int *offp, int proto) 217 { 218 219 if (ipsec_enabled) { 220 return ipsec6_common_input(mp, offp, proto); 221 } else { 222 m_freem(*mp); 223 return IPPROTO_DONE; 224 } 225 } 226 #define ipsec6_common_input ipsec6_common_input_wrapper 227 228 /* The ctlinput functions may not be loaded */ 229 #define IPSEC_WRAP_CTLINPUT(name) \ 230 static void * \ 231 name##_wrapper(int a, const struct sockaddr *b, void *c)\ 232 { \ 233 void *rv; \ 234 KERNEL_LOCK(1, NULL); \ 235 if (ipsec_enabled) \ 236 rv = name(a, b, c); \ 237 else \ 238 rv = NULL; \ 239 KERNEL_UNLOCK_ONE(NULL); \ 240 return rv; \ 241 } 242 IPSEC_WRAP_CTLINPUT(ah6_ctlinput) 243 IPSEC_WRAP_CTLINPUT(esp6_ctlinput) 244 245 #else /* !IPSEC_RUMPKERNEL */ 246 247 PR_WRAP_CTLINPUT(ah6_ctlinput) 248 PR_WRAP_CTLINPUT(esp6_ctlinput) 249 250 #endif /* !IPSEC_RUMPKERNEL */ 251 252 #define ah6_ctlinput ah6_ctlinput_wrapper 253 #define esp6_ctlinput esp6_ctlinput_wrapper 254 255 #endif /* IPSEC */ 256 257 static void 258 tcp6_init(void) 259 { 260 261 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 262 263 tcp_init_common(sizeof(struct ip6_hdr)); 264 } 265 266 const struct ip6protosw inet6sw[] = { 267 { .pr_domain = &inet6domain, 268 .pr_protocol = IPPROTO_IPV6, 269 .pr_init = ip6_init, 270 .pr_fasttimo = frag6_fasttimo, 271 .pr_slowtimo = frag6_slowtimo, 272 .pr_drain = frag6_drainstub, 273 }, 274 { .pr_type = SOCK_RAW, 275 .pr_domain = &inet6domain, 276 .pr_protocol = IPPROTO_ICMPV6, 277 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 278 .pr_input = icmp6_input, 279 .pr_ctlinput = rip6_ctlinput, 280 .pr_ctloutput = icmp6_ctloutput, 281 .pr_usrreqs = &rip6_usrreqs, 282 .pr_init = icmp6_init, 283 }, 284 { .pr_type = SOCK_DGRAM, 285 .pr_domain = &inet6domain, 286 .pr_protocol = IPPROTO_UDP, 287 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 288 .pr_input = udp6_input, 289 .pr_ctlinput = udp6_ctlinput, 290 .pr_ctloutput = udp6_ctloutput, 291 .pr_usrreqs = &udp6_usrreqs, 292 .pr_init = udp6_init, 293 }, 294 { .pr_type = SOCK_STREAM, 295 .pr_domain = &inet6domain, 296 .pr_protocol = IPPROTO_TCP, 297 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 298 .pr_input = tcp6_input, 299 .pr_ctlinput = tcp6_ctlinput, 300 .pr_ctloutput = tcp_ctloutput, 301 .pr_usrreqs = &tcp_usrreqs, 302 .pr_init = tcp6_init, 303 .pr_fasttimo = tcp_fasttimo, 304 .pr_drain = tcp_drainstub, 305 }, 306 #ifdef DCCP 307 { .pr_type = SOCK_CONN_DGRAM, 308 .pr_domain = &inet6domain, 309 .pr_protocol = IPPROTO_DCCP, 310 .pr_flags = PR_CONNREQUIRED|PR_ATOMIC|PR_LISTEN, 311 .pr_input = dccp6_input, 312 .pr_ctlinput = dccp6_ctlinput, 313 .pr_ctloutput = dccp_ctloutput, 314 .pr_usrreqs = &dccp6_usrreqs, 315 #ifndef INET 316 .pr_init = dccp_init, 317 #endif 318 }, 319 #endif /* DCCP */ 320 #ifdef SCTP 321 { .pr_type = SOCK_DGRAM, 322 .pr_domain = &inet6domain, 323 .pr_protocol = IPPROTO_SCTP, 324 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 325 .pr_input = sctp6_input, 326 .pr_ctlinput = sctp6_ctlinput, 327 .pr_ctloutput = sctp_ctloutput, 328 .pr_usrreqs = &sctp6_usrreqs, 329 .pr_drain = sctp_drain, 330 }, 331 { .pr_type = SOCK_SEQPACKET, 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_STREAM, 342 .pr_domain = &inet6domain, 343 .pr_protocol = IPPROTO_SCTP, 344 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, 345 .pr_input = sctp6_input, 346 .pr_ctlinput = sctp6_ctlinput, 347 .pr_ctloutput = sctp_ctloutput, 348 .pr_usrreqs = &sctp6_usrreqs, 349 .pr_drain = sctp_drain, 350 }, 351 #endif /* SCTP */ 352 { .pr_type = SOCK_RAW, 353 .pr_domain = &inet6domain, 354 .pr_protocol = IPPROTO_RAW, 355 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 356 .pr_input = rip6_input, 357 .pr_ctlinput = rip6_ctlinput, 358 .pr_ctloutput = rip6_ctloutput, 359 .pr_usrreqs = &rip6_usrreqs, 360 }, 361 #ifdef GATEWAY 362 { .pr_domain = &inet6domain, 363 .pr_protocol = IPPROTO_IPV6, 364 .pr_slowtimo = ip6flow_slowtimo, 365 .pr_init = ip6flow_poolinit, 366 }, 367 #endif /* GATEWAY */ 368 { .pr_type = SOCK_RAW, 369 .pr_domain = &inet6domain, 370 .pr_protocol = IPPROTO_DSTOPTS, 371 .pr_flags = PR_ATOMIC|PR_ADDR, 372 .pr_input = dest6_input, 373 }, 374 { .pr_type = SOCK_RAW, 375 .pr_domain = &inet6domain, 376 .pr_protocol = IPPROTO_ROUTING, 377 .pr_flags = PR_ATOMIC|PR_ADDR, 378 .pr_input = route6_input, 379 }, 380 { .pr_type = SOCK_RAW, 381 .pr_domain = &inet6domain, 382 .pr_protocol = IPPROTO_FRAGMENT, 383 .pr_flags = PR_ATOMIC|PR_ADDR, 384 .pr_input = frag6_input, 385 }, 386 #ifdef IPSEC 387 { .pr_type = SOCK_RAW, 388 .pr_domain = &inet6domain, 389 .pr_protocol = IPPROTO_AH, 390 .pr_flags = PR_ATOMIC|PR_ADDR, 391 .pr_input = ipsec6_common_input, 392 .pr_ctlinput = ah6_ctlinput, 393 }, 394 { .pr_type = SOCK_RAW, 395 .pr_domain = &inet6domain, 396 .pr_protocol = IPPROTO_ESP, 397 .pr_flags = PR_ATOMIC|PR_ADDR, 398 .pr_input = ipsec6_common_input, 399 .pr_ctlinput = esp6_ctlinput, 400 }, 401 { .pr_type = SOCK_RAW, 402 .pr_domain = &inet6domain, 403 .pr_protocol = IPPROTO_IPCOMP, 404 .pr_flags = PR_ATOMIC|PR_ADDR, 405 .pr_input = ipsec6_common_input, 406 }, 407 #endif /* IPSEC */ 408 #ifdef INET 409 { .pr_type = SOCK_RAW, 410 .pr_domain = &inet6domain, 411 .pr_protocol = IPPROTO_IPV4, 412 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 413 .pr_input = encap6_input, 414 .pr_ctlinput = encap6_ctlinput, 415 .pr_ctloutput = rip6_ctloutput, 416 .pr_usrreqs = &rip6_usrreqs, 417 .pr_init = encap_init, 418 }, 419 #endif 420 { .pr_type = SOCK_RAW, 421 .pr_domain = &inet6domain, 422 .pr_protocol = IPPROTO_IPV6, 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 #if NCARP > 0 431 { .pr_type = SOCK_RAW, 432 .pr_domain = &inet6domain, 433 .pr_protocol = IPPROTO_CARP, 434 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 435 .pr_input = carp6_proto_input, 436 .pr_ctloutput = rip6_ctloutput, 437 .pr_usrreqs = &rip6_usrreqs, 438 }, 439 #endif /* NCARP */ 440 { .pr_type = SOCK_RAW, 441 .pr_domain = &inet6domain, 442 .pr_protocol = IPPROTO_L2TP, 443 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 444 .pr_input = encap6_input, 445 .pr_ctlinput = rip6_ctlinput, 446 .pr_ctloutput = rip6_ctloutput, 447 .pr_usrreqs = &rip6_usrreqs, 448 .pr_init = encap_init, 449 }, 450 { .pr_type = SOCK_RAW, 451 .pr_domain = &inet6domain, 452 .pr_protocol = IPPROTO_PIM, 453 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 454 .pr_input = pim6_input, 455 .pr_ctloutput = rip6_ctloutput, 456 .pr_usrreqs = &rip6_usrreqs, 457 .pr_init = pim6_init, 458 }, 459 /* raw wildcard */ 460 { .pr_type = SOCK_RAW, 461 .pr_domain = &inet6domain, 462 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 463 .pr_input = rip6_input, 464 .pr_ctloutput = rip6_ctloutput, 465 .pr_usrreqs = &rip6_usrreqs, 466 .pr_init = rip6_init, 467 }, 468 }; 469 470 static const struct sockaddr_in6 in6_any = { 471 .sin6_len = sizeof(in6_any) 472 , .sin6_family = AF_INET6 473 , .sin6_port = 0 474 , .sin6_flowinfo = 0 475 , .sin6_addr = IN6ADDR_ANY_INIT 476 , .sin6_scope_id = 0 477 }; 478 479 bool in6_present = false; 480 static void 481 in6_dom_init(void) 482 { 483 484 in6_present = true; 485 } 486 487 struct domain inet6domain = { 488 .dom_family = AF_INET6, .dom_name = "internet6", 489 .dom_init = in6_dom_init, .dom_externalize = NULL, .dom_dispose = NULL, 490 .dom_protosw = (const struct protosw *)inet6sw, 491 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 492 .dom_rtattach = rt_inithead, 493 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 494 .dom_maxrtkey = sizeof(struct ip_pack6), 495 .dom_if_up = in6_if_up, .dom_if_down = in6_if_down, 496 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 497 .dom_if_link_state_change = in6_if_link_state_change, 498 .dom_link = { NULL }, 499 .dom_mowner = MOWNER_INIT("",""), 500 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 501 .dom_sa_cmplen = sizeof(struct in6_addr), 502 .dom_sa_any = (const struct sockaddr *)&in6_any, 503 .dom_sockaddr_externalize = sockaddr_in6_externalize, 504 }; 505 506 #if 0 507 int 508 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 509 { 510 uint_fast8_t len; 511 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 512 addrend = addrofs + sizeof(struct in6_addr); 513 int rc; 514 const struct sockaddr_in6 *lsin6, *rsin6; 515 516 lsin6 = satocsin6(lsa); 517 rsin6 = satocsin6(rsa); 518 519 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 520 521 if (len > addrofs && 522 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 523 len - addrofs)) != 0) 524 return rc; 525 526 return lsin6->sin6_len - rsin6->sin6_len; 527 } 528 #endif 529 530 /* 531 * Internet configuration info 532 */ 533 #ifdef GATEWAY6 534 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 535 #else 536 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 537 #endif 538 539 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 540 int ip6_sendredirects = 1; 541 int ip6_defhlim = IPV6_DEFHLIM; 542 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 543 int ip6_maxfragpackets = 200; 544 int ip6_maxfrags = 200; 545 int ip6_log_interval = 5; 546 int ip6_hdrnestlimit = 15; 547 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 548 int ip6_auto_flowlabel = 1; 549 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 550 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 551 int ip6_v6only = 1; 552 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 553 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 554 int ip6_param_rt_msg = 1; /* How to send parameter changing rtm */ 555 556 int ip6_keepfaith = 0; 557 time_t ip6_log_time = 0; 558 559 /* icmp6 */ 560 int pmtu_expire = 60*10; 561 562 /* raw IP6 parameters */ 563 /* 564 * Nominal space allocated to a raw ip socket. 565 */ 566 #define RIPV6SNDQ 8192 567 #define RIPV6RCVQ 16384 568 569 u_long rip6_sendspace = RIPV6SNDQ; 570 u_long rip6_recvspace = RIPV6RCVQ; 571 572 /* ICMPV6 parameters */ 573 int icmp6_rediraccept = 1; /* accept and process redirects */ 574 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 575 int icmp6errppslim = 100; /* 100pps */ 576 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 577
Indexes created Sat Sep 20 22:09:52 GMT 2025