1 /* $NetBSD: in6_proto.c,v 1.113 2016/07/06 10:49:49 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 1.113 2016/07/06 10:49:49 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 #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 84 #include <netinet/in.h> 85 #include <netinet/in_systm.h> 86 #include <netinet/in_var.h> 87 #include <netinet/ip_encap.h> 88 #include <netinet/ip.h> 89 #include <netinet/ip_var.h> 90 #include <netinet/in_pcb.h> 91 #include <netinet/ip6.h> 92 #include <netinet6/ip6_var.h> 93 #include <netinet/icmp6.h> 94 #include <netinet6/in6_pcb.h> 95 96 #include <netinet/tcp.h> 97 #include <netinet/tcp_fsm.h> 98 #include <netinet/tcp_seq.h> 99 #include <netinet/tcp_timer.h> 100 #include <netinet/tcp_var.h> 101 #include <netinet/tcpip.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 #include <netinet6/nd6.h> 123 124 #ifdef IPSEC 125 #include <netipsec/ipsec.h> 126 #include <netipsec/ipsec6.h> 127 #include <netipsec/key.h> 128 #endif /* IPSEC */ 129 130 131 #include "carp.h" 132 #if NCARP > 0 133 #include <netinet/ip_carp.h> 134 #endif 135 136 #include "etherip.h" 137 #if NETHERIP > 0 138 #include <netinet6/ip6_etherip.h> 139 #endif 140 141 #include <netinet6/ip6protosw.h> 142 143 #include <net/net_osdep.h> 144 145 /* 146 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 147 */ 148 149 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 150 151 /* Wrappers to acquire kernel_lock. */ 152 153 PR_WRAP_CTLINPUT(rip6_ctlinput) 154 PR_WRAP_CTLINPUT(encap6_ctlinput) 155 PR_WRAP_CTLINPUT(udp6_ctlinput) 156 PR_WRAP_CTLINPUT(tcp6_ctlinput) 157 158 #define rip6_ctlinput rip6_ctlinput_wrapper 159 #define encap6_ctlinput encap6_ctlinput_wrapper 160 #define udp6_ctlinput udp6_ctlinput_wrapper 161 #define tcp6_ctlinput tcp6_ctlinput_wrapper 162 163 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 164 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 165 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 166 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 167 168 #define rip6_ctloutput rip6_ctloutput_wrapper 169 #define tcp_ctloutput tcp_ctloutput_wrapper 170 #define udp6_ctloutput udp6_ctloutput_wrapper 171 #define icmp6_ctloutput icmp6_ctloutput_wrapper 172 173 #if defined(DCCP) 174 PR_WRAP_CTLINPUT(dccp6_ctlinput) 175 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 176 177 #define dccp6_ctlinput dccp6_ctlinput_wrapper 178 #define dccp_ctloutput dccp_ctloutput_wrapper 179 #endif 180 181 #if defined(SCTP) 182 PR_WRAP_CTLINPUT(sctp6_ctlinput) 183 PR_WRAP_CTLOUTPUT(sctp_ctloutput) 184 185 #define sctp6_ctlinput sctp6_ctlinput_wrapper 186 #define sctp_ctloutput sctp_ctloutput_wrapper 187 #endif 188 189 #if defined(IPSEC) 190 PR_WRAP_CTLINPUT(ah6_ctlinput) 191 192 #define ah6_ctlinput ah6_ctlinput_wrapper 193 #endif 194 195 #if defined(IPSEC) 196 PR_WRAP_CTLINPUT(esp6_ctlinput) 197 198 #define esp6_ctlinput esp6_ctlinput_wrapper 199 #endif 200 201 static void 202 tcp6_init(void) 203 { 204 205 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 206 207 tcp_init_common(sizeof(struct ip6_hdr)); 208 } 209 210 const struct ip6protosw inet6sw[] = { 211 { .pr_domain = &inet6domain, 212 .pr_protocol = IPPROTO_IPV6, 213 .pr_init = ip6_init, 214 .pr_fasttimo = frag6_fasttimo, 215 .pr_slowtimo = frag6_slowtimo, 216 .pr_drain = frag6_drainstub, 217 }, 218 { .pr_type = SOCK_DGRAM, 219 .pr_domain = &inet6domain, 220 .pr_protocol = IPPROTO_UDP, 221 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 222 .pr_input = udp6_input, 223 .pr_ctlinput = udp6_ctlinput, 224 .pr_ctloutput = udp6_ctloutput, 225 .pr_usrreqs = &udp6_usrreqs, 226 .pr_init = udp6_init, 227 }, 228 { .pr_type = SOCK_STREAM, 229 .pr_domain = &inet6domain, 230 .pr_protocol = IPPROTO_TCP, 231 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 232 .pr_input = tcp6_input, 233 .pr_ctlinput = tcp6_ctlinput, 234 .pr_ctloutput = tcp_ctloutput, 235 .pr_usrreqs = &tcp_usrreqs, 236 .pr_init = tcp6_init, 237 .pr_fasttimo = tcp_fasttimo, 238 .pr_drain = tcp_drainstub, 239 }, 240 #ifdef DCCP 241 { .pr_type = SOCK_CONN_DGRAM, 242 .pr_domain = &inet6domain, 243 .pr_protocol = IPPROTO_DCCP, 244 .pr_flags = PR_CONNREQUIRED|PR_ATOMIC|PR_LISTEN, 245 .pr_input = dccp6_input, 246 .pr_ctlinput = dccp6_ctlinput, 247 .pr_ctloutput = dccp_ctloutput, 248 .pr_usrreqs = &dccp6_usrreqs, 249 #ifndef INET 250 .pr_init = dccp_init, 251 #endif 252 }, 253 #endif /* DCCP */ 254 #ifdef SCTP 255 { .pr_type = SOCK_DGRAM, 256 .pr_domain = &inet6domain, 257 .pr_protocol = IPPROTO_SCTP, 258 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 259 .pr_input = sctp6_input, 260 .pr_ctlinput = sctp6_ctlinput, 261 .pr_ctloutput = sctp_ctloutput, 262 .pr_usrreqs = &sctp6_usrreqs, 263 .pr_drain = sctp_drain, 264 }, 265 { .pr_type = SOCK_SEQPACKET, 266 .pr_domain = &inet6domain, 267 .pr_protocol = IPPROTO_SCTP, 268 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 269 .pr_input = sctp6_input, 270 .pr_ctlinput = sctp6_ctlinput, 271 .pr_ctloutput = sctp_ctloutput, 272 .pr_drain = sctp_drain, 273 }, 274 { .pr_type = SOCK_STREAM, 275 .pr_domain = &inet6domain, 276 .pr_protocol = IPPROTO_SCTP, 277 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, 278 .pr_input = sctp6_input, 279 .pr_ctlinput = sctp6_ctlinput, 280 .pr_ctloutput = sctp_ctloutput, 281 .pr_drain = sctp_drain, 282 }, 283 #endif /* SCTP */ 284 { .pr_type = SOCK_RAW, 285 .pr_domain = &inet6domain, 286 .pr_protocol = IPPROTO_RAW, 287 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 288 .pr_input = rip6_input, 289 .pr_ctlinput = rip6_ctlinput, 290 .pr_ctloutput = rip6_ctloutput, 291 .pr_usrreqs = &rip6_usrreqs, 292 }, 293 #ifdef GATEWAY 294 { .pr_domain = &inet6domain, 295 .pr_protocol = IPPROTO_IPV6, 296 .pr_slowtimo = ip6flow_slowtimo, 297 .pr_init = ip6flow_poolinit, 298 }, 299 #endif /* GATEWAY */ 300 { .pr_type = SOCK_RAW, 301 .pr_domain = &inet6domain, 302 .pr_protocol = IPPROTO_ICMPV6, 303 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 304 .pr_input = icmp6_input, 305 .pr_ctlinput = rip6_ctlinput, 306 .pr_ctloutput = icmp6_ctloutput, 307 .pr_usrreqs = &rip6_usrreqs, 308 .pr_init = icmp6_init, 309 }, 310 { .pr_type = SOCK_RAW, 311 .pr_domain = &inet6domain, 312 .pr_protocol = IPPROTO_DSTOPTS, 313 .pr_flags = PR_ATOMIC|PR_ADDR, 314 .pr_input = dest6_input, 315 }, 316 { .pr_type = SOCK_RAW, 317 .pr_domain = &inet6domain, 318 .pr_protocol = IPPROTO_ROUTING, 319 .pr_flags = PR_ATOMIC|PR_ADDR, 320 .pr_input = route6_input, 321 }, 322 { .pr_type = SOCK_RAW, 323 .pr_domain = &inet6domain, 324 .pr_protocol = IPPROTO_FRAGMENT, 325 .pr_flags = PR_ATOMIC|PR_ADDR, 326 .pr_input = frag6_input, 327 }, 328 #ifdef IPSEC 329 { .pr_type = SOCK_RAW, 330 .pr_domain = &inet6domain, 331 .pr_protocol = IPPROTO_AH, 332 .pr_flags = PR_ATOMIC|PR_ADDR, 333 .pr_input = ipsec6_common_input, 334 .pr_ctlinput = ah6_ctlinput, 335 }, 336 { .pr_type = SOCK_RAW, 337 .pr_domain = &inet6domain, 338 .pr_protocol = IPPROTO_ESP, 339 .pr_flags = PR_ATOMIC|PR_ADDR, 340 .pr_input = ipsec6_common_input, 341 .pr_ctlinput = esp6_ctlinput, 342 }, 343 { .pr_type = SOCK_RAW, 344 .pr_domain = &inet6domain, 345 .pr_protocol = IPPROTO_IPCOMP, 346 .pr_flags = PR_ATOMIC|PR_ADDR, 347 .pr_input = ipsec6_common_input, 348 }, 349 #endif /* IPSEC */ 350 #ifdef INET 351 { .pr_type = SOCK_RAW, 352 .pr_domain = &inet6domain, 353 .pr_protocol = IPPROTO_IPV4, 354 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 355 .pr_input = encap6_input, 356 .pr_ctlinput = encap6_ctlinput, 357 .pr_ctloutput = rip6_ctloutput, 358 .pr_usrreqs = &rip6_usrreqs, 359 .pr_init = encap_init, 360 }, 361 #endif 362 { .pr_type = SOCK_RAW, 363 .pr_domain = &inet6domain, 364 .pr_protocol = IPPROTO_IPV6, 365 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 366 .pr_input = encap6_input, 367 .pr_ctlinput = encap6_ctlinput, 368 .pr_ctloutput = rip6_ctloutput, 369 .pr_usrreqs = &rip6_usrreqs, 370 .pr_init = encap_init, 371 }, 372 #if NETHERIP > 0 373 { .pr_type = SOCK_RAW, 374 .pr_domain = &inet6domain, 375 .pr_protocol = IPPROTO_ETHERIP, 376 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 377 .pr_input = ip6_etherip_input, 378 .pr_ctlinput = rip6_ctlinput, 379 .pr_ctloutput = rip6_ctloutput, 380 .pr_usrreqs = &rip6_usrreqs, 381 }, 382 #endif 383 #if NCARP > 0 384 { .pr_type = SOCK_RAW, 385 .pr_domain = &inet6domain, 386 .pr_protocol = IPPROTO_CARP, 387 .pr_flags = PR_ATOMIC|PR_ADDR, 388 .pr_input = carp6_proto_input, 389 .pr_ctloutput = rip6_ctloutput, 390 .pr_usrreqs = &rip6_usrreqs, 391 }, 392 #endif /* NCARP */ 393 { .pr_type = SOCK_RAW, 394 .pr_domain = &inet6domain, 395 .pr_protocol = IPPROTO_PIM, 396 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 397 .pr_input = pim6_input, 398 .pr_ctloutput = rip6_ctloutput, 399 .pr_usrreqs = &rip6_usrreqs, 400 .pr_init = pim6_init, 401 }, 402 /* raw wildcard */ 403 { .pr_type = SOCK_RAW, 404 .pr_domain = &inet6domain, 405 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 406 .pr_input = rip6_input, 407 .pr_ctloutput = rip6_ctloutput, 408 .pr_usrreqs = &rip6_usrreqs, 409 .pr_init = rip6_init, 410 }, 411 }; 412 413 static const struct sockaddr_in6 in6_any = { 414 .sin6_len = sizeof(in6_any) 415 , .sin6_family = AF_INET6 416 , .sin6_port = 0 417 , .sin6_flowinfo = 0 418 , .sin6_addr = IN6ADDR_ANY_INIT 419 , .sin6_scope_id = 0 420 }; 421 422 bool in6_present = false; 423 static void 424 in6_dom_init(void) 425 { 426 427 in6_present = true; 428 } 429 430 struct domain inet6domain = { 431 .dom_family = AF_INET6, .dom_name = "internet6", 432 .dom_init = in6_dom_init, .dom_externalize = NULL, .dom_dispose = NULL, 433 .dom_protosw = (const struct protosw *)inet6sw, 434 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 435 .dom_rtattach = rt_inithead, 436 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 437 .dom_maxrtkey = sizeof(struct ip_pack6), 438 .dom_if_up = in6_if_up, .dom_if_down = in6_if_down, 439 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 440 .dom_if_link_state_change = in6_if_link_state_change, 441 .dom_ifqueues = { NULL, NULL }, 442 .dom_link = { NULL }, 443 .dom_mowner = MOWNER_INIT("",""), 444 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 445 .dom_sa_cmplen = sizeof(struct in6_addr), 446 .dom_sa_any = (const struct sockaddr *)&in6_any, 447 .dom_sockaddr_externalize = sockaddr_in6_externalize, 448 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 449 }; 450 451 #if 0 452 int 453 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 454 { 455 uint_fast8_t len; 456 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 457 addrend = addrofs + sizeof(struct in6_addr); 458 int rc; 459 const struct sockaddr_in6 *lsin6, *rsin6; 460 461 lsin6 = satocsin6(lsa); 462 rsin6 = satocsin6(rsa); 463 464 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 465 466 if (len > addrofs && 467 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 468 len - addrofs)) != 0) 469 return rc; 470 471 return lsin6->sin6_len - rsin6->sin6_len; 472 } 473 #endif 474 475 /* 476 * Internet configuration info 477 */ 478 #ifndef IPV6FORWARDING 479 #ifdef GATEWAY6 480 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 481 #else 482 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 483 #endif /* GATEWAY6 */ 484 #endif /* !IPV6FORWARDING */ 485 486 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 487 int ip6_sendredirects = 1; 488 int ip6_defhlim = IPV6_DEFHLIM; 489 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 490 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 491 int ip6_maxfragpackets = 200; 492 int ip6_maxfrags = 200; 493 int ip6_log_interval = 5; 494 int ip6_hdrnestlimit = 50; /* appropriate? */ 495 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 496 int ip6_auto_flowlabel = 1; 497 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 498 int ip6_rr_prune = 5; /* router renumbering prefix 499 * walk list every 5 sec. */ 500 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 501 int ip6_v6only = 1; 502 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 503 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 504 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 505 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 506 507 int ip6_keepfaith = 0; 508 time_t ip6_log_time = 0; 509 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 510 * routes via rtadv expected to be 511 * significantly larger than common use. 512 * if you need to count: 3 extra initial 513 * routes, plus 1 per interface after the 514 * first one, then one per non-linklocal 515 * prefix */ 516 517 /* icmp6 */ 518 /* 519 * BSDI4 defines these variables in in_proto.c... 520 * XXX: what if we don't define INET? Should we define pmtu6_expire 521 * or so? (jinmei@kame.net 19990310) 522 */ 523 int pmtu_expire = 60*10; 524 525 /* raw IP6 parameters */ 526 /* 527 * Nominal space allocated to a raw ip socket. 528 */ 529 #define RIPV6SNDQ 8192 530 #define RIPV6RCVQ 8192 531 532 u_long rip6_sendspace = RIPV6SNDQ; 533 u_long rip6_recvspace = RIPV6RCVQ; 534 535 /* ICMPV6 parameters */ 536 int icmp6_rediraccept = 1; /* accept and process redirects */ 537 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 538 int icmp6errppslim = 100; /* 100pps */ 539 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 540