Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6_proto.c
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1 /* $FreeBSD: releng/6.0/sys/netinet6/in6_proto.c 149216 2005-08-18 09:01:48Z suz $ */ 2 /* $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 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 * 4. 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 "opt_inet.h" 65 #include "opt_inet6.h" 66 #include "opt_ipsec.h" 67 #include "opt_ipstealth.h" 68 #include "opt_carp.h" 69 70 #include <sys/param.h> 71 #include <sys/socket.h> 72 #include <sys/socketvar.h> 73 #include <sys/protosw.h> 74 #include <sys/kernel.h> 75 #include <sys/domain.h> 76 #include <sys/mbuf.h> 77 #include <sys/systm.h> 78 #include <sys/sysctl.h> 79 80 #include <net/if.h> 81 #include <net/radix.h> 82 #include <net/route.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/ip6.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet/icmp6.h> 93 94 #include <netinet/tcp.h> 95 #include <netinet/tcp_timer.h> 96 #include <netinet/tcp_var.h> 97 #include <netinet/udp.h> 98 #include <netinet/udp_var.h> 99 #include <netinet6/tcp6_var.h> 100 #include <netinet6/raw_ip6.h> 101 #include <netinet6/udp6_var.h> 102 #include <netinet6/pim6_var.h> 103 #include <netinet6/nd6.h> 104 105 #ifdef IPSEC 106 #include <netinet6/ipsec.h> 107 #ifdef INET6 108 #include <netinet6/ipsec6.h> 109 #endif 110 #include <netinet6/ah.h> 111 #ifdef INET6 112 #include <netinet6/ah6.h> 113 #endif 114 #ifdef IPSEC_ESP 115 #include <netinet6/esp.h> 116 #ifdef INET6 117 #include <netinet6/esp6.h> 118 #endif 119 #endif 120 #include <netinet6/ipcomp.h> 121 #ifdef INET6 122 #include <netinet6/ipcomp6.h> 123 #endif 124 #endif /* IPSEC */ 125 126 #ifdef DEV_CARP 127 #include <netinet/ip_carp.h> 128 #endif 129 130 #ifdef FAST_IPSEC 131 #include <netipsec/ipsec6.h> 132 #define IPSEC 133 #define IPSEC_ESP 134 #define ah6_input ipsec6_common_input 135 #define esp6_input ipsec6_common_input 136 #define ipcomp6_input ipsec6_common_input 137 #endif /* FAST_IPSEC */ 138 139 #include <netinet6/ip6protosw.h> 140 141 #include <net/net_osdep.h> 142 143 /* 144 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 145 */ 146 147 extern struct domain inet6domain; 148 static struct pr_usrreqs nousrreqs; 149 150 #define PR_LISTEN 0 151 #define PR_ABRTACPTDIS 0 152 153 struct ip6protosw inet6sw[] = { 154 { 0, &inet6domain, IPPROTO_IPV6, 0, 155 0, 0, 0, 0, 156 0, 157 ip6_init, 0, frag6_slowtimo, frag6_drain, 158 &nousrreqs, 159 }, 160 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 161 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 162 0, 163 0, 0, 0, 0, 164 &udp6_usrreqs, 165 }, 166 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN, 167 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 168 0, 169 #ifdef INET /* don't call initialization and timeout routines twice */ 170 0, 0, 0, tcp_drain, 171 #else 172 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 173 #endif 174 &tcp6_usrreqs, 175 }, 176 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 177 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 178 0, 179 0, 0, 0, 0, 180 &rip6_usrreqs 181 }, 182 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 183 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 184 0, 185 icmp6_init, icmp6_fasttimo, 0, 0, 186 &rip6_usrreqs 187 }, 188 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 189 dest6_input, 0, 0, 0, 190 0, 191 0, 0, 0, 0, 192 &nousrreqs 193 }, 194 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 195 route6_input, 0, 0, 0, 196 0, 197 0, 0, 0, 0, 198 &nousrreqs 199 }, 200 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 201 frag6_input, 0, 0, 0, 202 0, 203 0, 0, 0, 0, 204 &nousrreqs 205 }, 206 #ifdef IPSEC 207 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 208 ah6_input, 0, 0, 0, 209 0, 210 0, 0, 0, 0, 211 &nousrreqs, 212 }, 213 #ifdef IPSEC_ESP 214 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 215 esp6_input, 0, 216 esp6_ctlinput, 217 0, 218 0, 219 0, 0, 0, 0, 220 &nousrreqs, 221 }, 222 #endif 223 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 224 ipcomp6_input, 0, 0, 0, 225 0, 226 0, 0, 0, 0, 227 &nousrreqs, 228 }, 229 #endif /* IPSEC */ 230 #ifdef INET 231 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 232 encap6_input, rip6_output, 0, rip6_ctloutput, 233 0, 234 encap_init, 0, 0, 0, 235 &rip6_usrreqs 236 }, 237 #endif /* INET */ 238 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 239 encap6_input, rip6_output, 0, rip6_ctloutput, 240 0, 241 encap_init, 0, 0, 0, 242 &rip6_usrreqs 243 }, 244 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 245 pim6_input, rip6_output, 0, rip6_ctloutput, 246 0, 247 0, 0, 0, 0, 248 &rip6_usrreqs 249 }, 250 #ifdef DEV_CARP 251 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 252 carp6_input, rip6_output, 0, rip6_ctloutput, 253 0, 254 0, 0, 0, 0, 255 &rip6_usrreqs 256 }, 257 #endif /* DEV_CARP */ 258 /* raw wildcard */ 259 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 260 rip6_input, rip6_output, 0, rip6_ctloutput, 261 0, 262 0, 0, 0, 0, 263 &rip6_usrreqs 264 }, 265 }; 266 267 extern int in6_inithead __P((void **, int)); 268 269 struct domain inet6domain = 270 { AF_INET6, "internet6", 0, 0, 0, 271 (struct protosw *)inet6sw, 272 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 273 in6_inithead, 274 offsetof(struct sockaddr_in6, sin6_addr) << 3, 275 sizeof(struct sockaddr_in6), 276 in6_domifattach, in6_domifdetach, }; 277 278 DOMAIN_SET(inet6); 279 280 /* 281 * Internet configuration info 282 */ 283 #ifndef IPV6FORWARDING 284 #ifdef GATEWAY6 285 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 286 #else 287 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 288 #endif /* GATEWAY6 */ 289 #endif /* !IPV6FORWARDING */ 290 291 #ifndef IPV6_SENDREDIRECTS 292 #define IPV6_SENDREDIRECTS 1 293 #endif 294 295 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 296 int ip6_sendredirects = IPV6_SENDREDIRECTS; 297 int ip6_defhlim = IPV6_DEFHLIM; 298 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 299 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 300 int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */ 301 int ip6_maxfrags; /* initialized in frag6.c:frag6_init() */ 302 int ip6_log_interval = 5; 303 int ip6_hdrnestlimit = 50; /* appropriate? */ 304 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 305 int ip6_auto_flowlabel = 1; 306 int ip6_gif_hlim = 0; 307 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 308 int ip6_rr_prune = 5; /* router renumbering prefix 309 * walk list every 5 sec. */ 310 int ip6_v6only = 1; 311 312 int ip6_keepfaith = 0; 313 time_t ip6_log_time = (time_t)0L; 314 #ifdef IPSTEALTH 315 int ip6stealth = 0; 316 #endif 317 318 /* icmp6 */ 319 /* 320 * BSDI4 defines these variables in in_proto.c... 321 * XXX: what if we don't define INET? Should we define pmtu6_expire 322 * or so? (jinmei@kame.net 19990310) 323 */ 324 int pmtu_expire = 60*10; 325 int pmtu_probe = 60*2; 326 327 /* raw IP6 parameters */ 328 /* 329 * Nominal space allocated to a raw ip socket. 330 */ 331 #define RIPV6SNDQ 8192 332 #define RIPV6RCVQ 8192 333 334 u_long rip6_sendspace = RIPV6SNDQ; 335 u_long rip6_recvspace = RIPV6RCVQ; 336 337 /* ICMPV6 parameters */ 338 int icmp6_rediraccept = 1; /* accept and process redirects */ 339 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 340 int icmp6errppslim = 100; /* 100pps */ 341 int icmp6_nodeinfo = 3; /* enable/disable NI response */ 342 343 /* UDP on IP6 parameters */ 344 int udp6_sendspace = 9216; /* really max datagram size */ 345 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 346 /* 40 1K datagrams */ 347 348 /* 349 * sysctl related items. 350 */ 351 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0, 352 "Internet6 Family"); 353 354 /* net.inet6 */ 355 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6"); 356 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6"); 357 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6"); 358 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6"); 359 #ifdef IPSEC 360 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6"); 361 #endif /* IPSEC */ 362 363 /* net.inet6.ip6 */ 364 static int 365 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 366 { 367 int error = 0; 368 int old; 369 370 error = SYSCTL_OUT(req, arg1, sizeof(int)); 371 if (error || !req->newptr) 372 return (error); 373 old = ip6_temp_preferred_lifetime; 374 error = SYSCTL_IN(req, arg1, sizeof(int)); 375 if (ip6_temp_preferred_lifetime < 376 ip6_desync_factor + ip6_temp_regen_advance) { 377 ip6_temp_preferred_lifetime = old; 378 return (EINVAL); 379 } 380 return (error); 381 } 382 383 static int 384 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 385 { 386 int error = 0; 387 int old; 388 389 error = SYSCTL_OUT(req, arg1, sizeof(int)); 390 if (error || !req->newptr) 391 return (error); 392 old = ip6_temp_valid_lifetime; 393 error = SYSCTL_IN(req, arg1, sizeof(int)); 394 if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) { 395 ip6_temp_preferred_lifetime = old; 396 return (EINVAL); 397 } 398 return (error); 399 } 400 401 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, 402 forwarding, CTLFLAG_RW, &ip6_forwarding, 0, ""); 403 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, 404 redirect, CTLFLAG_RW, &ip6_sendredirects, 0, ""); 405 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, 406 hlim, CTLFLAG_RW, &ip6_defhlim, 0, ""); 407 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD, 408 &ip6stat, ip6stat, ""); 409 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, 410 maxfragpackets, CTLFLAG_RW, &ip6_maxfragpackets, 0, ""); 411 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, 412 accept_rtadv, CTLFLAG_RW, &ip6_accept_rtadv, 0, ""); 413 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH, 414 keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0, ""); 415 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, 416 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, ""); 417 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, 418 hdrnestlimit, CTLFLAG_RW, &ip6_hdrnestlimit, 0, ""); 419 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, 420 dad_count, CTLFLAG_RW, &ip6_dad_count, 0, ""); 421 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, 422 auto_flowlabel, CTLFLAG_RW, &ip6_auto_flowlabel, 0, ""); 423 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, 424 defmcasthlim, CTLFLAG_RW, &ip6_defmcasthlim, 0, ""); 425 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM, 426 gifhlim, CTLFLAG_RW, &ip6_gif_hlim, 0, ""); 427 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, 428 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, ""); 429 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, 430 use_deprecated, CTLFLAG_RW, &ip6_use_deprecated, 0, ""); 431 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, 432 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, ""); 433 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, 434 use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr, 0, ""); 435 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 436 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0, 437 sysctl_ip6_temppltime, "I", ""); 438 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 439 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0, 440 sysctl_ip6_tempvltime, "I", ""); 441 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, 442 v6only, CTLFLAG_RW, &ip6_v6only, 0, ""); 443 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, 444 auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal, 0, ""); 445 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD, 446 &rip6stat, rip6stat, ""); 447 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, 448 prefer_tempaddr, CTLFLAG_RW, &ip6_prefer_tempaddr, 0, ""); 449 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, 450 maxfrags, CTLFLAG_RW, &ip6_maxfrags, 0, ""); 451 #ifdef IPSTEALTH 452 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_RW, 453 &ip6stealth, 0, ""); 454 #endif 455 456 /* net.inet6.icmp6 */ 457 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, 458 rediraccept, CTLFLAG_RW, &icmp6_rediraccept, 0, ""); 459 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, 460 redirtimeout, CTLFLAG_RW, &icmp6_redirtimeout, 0, ""); 461 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD, 462 &icmp6stat, icmp6stat, ""); 463 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, 464 nd6_prune, CTLFLAG_RW, &nd6_prune, 0, ""); 465 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, 466 nd6_delay, CTLFLAG_RW, &nd6_delay, 0, ""); 467 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, 468 nd6_umaxtries, CTLFLAG_RW, &nd6_umaxtries, 0, ""); 469 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, 470 nd6_mmaxtries, CTLFLAG_RW, &nd6_mmaxtries, 0, ""); 471 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, 472 nd6_useloopback, CTLFLAG_RW, &nd6_useloopback, 0, ""); 473 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, 474 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, ""); 475 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, 476 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0, ""); 477 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, 478 nd6_maxnudhint, CTLFLAG_RW, &nd6_maxnudhint, 0, ""); 479 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, 480 nd6_debug, CTLFLAG_RW, &nd6_debug, 0, "");
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