1 /* $FreeBSD$ */ 2 /* $KAME: in6_proto.c,v 1.64 2000/06/20 16:20:27 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. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 66 */ 67 68 #include "opt_inet.h" 69 #include "opt_inet6.h" 70 #include "opt_ipsec.h" 71 72 #include <sys/param.h> 73 #include <sys/socket.h> 74 #include <sys/socketvar.h> 75 #include <sys/protosw.h> 76 #include <sys/kernel.h> 77 #include <sys/domain.h> 78 #include <sys/mbuf.h> 79 #include <sys/systm.h> 80 #include <sys/sysctl.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/ip6.h> 93 #include <netinet6/ip6_var.h> 94 #include <netinet/icmp6.h> 95 96 #include <netinet/tcp.h> 97 #include <netinet/tcp_timer.h> 98 #include <netinet/tcp_var.h> 99 #include <netinet/udp.h> 100 #include <netinet/udp_var.h> 101 #include <netinet6/tcp6_var.h> 102 103 #include <netinet6/udp6_var.h> 104 105 #include <netinet6/pim6_var.h> 106 107 #include <netinet6/nd6.h> 108 #include <netinet6/in6_prefix.h> 109 110 #ifdef IPSEC 111 #include <netinet6/ipsec.h> 112 #include <netinet6/ipsec6.h> 113 #include <netinet6/ah.h> 114 #include <netinet6/ah6.h> 115 #ifdef IPSEC_ESP 116 #include <netinet6/esp.h> 117 #include <netinet6/esp6.h> 118 #endif 119 #include <netinet6/ipcomp.h> 120 #include <netinet6/ipcomp6.h> 121 #endif /*IPSEC*/ 122 123 #include <netinet6/ip6protosw.h> 124 125 #include "gif.h" 126 #if NGIF > 0 127 #include <netinet6/in6_gif.h> 128 #endif 129 130 #include <net/net_osdep.h> 131 132 /* 133 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 134 */ 135 136 extern struct domain inet6domain; 137 static struct pr_usrreqs nousrreqs; 138 139 struct ip6protosw inet6sw[] = { 140 { 0, &inet6domain, IPPROTO_IPV6, 0, 141 0, 0, 0, 0, 142 0, 143 ip6_init, 0, frag6_slowtimo, frag6_drain, 144 &nousrreqs, 145 }, 146 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC | PR_ADDR, 147 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 148 0, 149 0, 0, 0, 0, 150 &udp6_usrreqs, 151 }, 152 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED | PR_WANTRCVD, 153 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 154 0, 155 #ifdef INET /* don't call timeout routines twice */ 156 tcp_init, 0, 0, tcp_drain, 157 #else 158 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 159 #endif 160 &tcp6_usrreqs, 161 }, 162 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC | PR_ADDR, 163 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 164 0, 165 0, 0, 0, 0, 166 &rip6_usrreqs 167 }, 168 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC | PR_ADDR, 169 icmp6_input, rip6_output, 0, rip6_ctloutput, 170 0, 171 icmp6_init, icmp6_fasttimo, 0, 0, 172 &rip6_usrreqs 173 }, 174 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 175 dest6_input, 0, 0, 0, 176 0, 177 0, 0, 0, 0, 178 &nousrreqs 179 }, 180 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 181 route6_input, 0, 0, 0, 182 0, 183 0, 0, 0, 0, 184 &nousrreqs 185 }, 186 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 187 frag6_input, 0, 0, 0, 188 0, 189 0, 0, 0, 0, 190 &nousrreqs 191 }, 192 #ifdef IPSEC 193 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 194 ah6_input, 0, 0, 0, 195 0, 196 0, 0, 0, 0, 197 &nousrreqs, 198 }, 199 #ifdef IPSEC_ESP 200 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 201 esp6_input, 0, 0, 0, 202 0, 203 0, 0, 0, 0, 204 &nousrreqs, 205 }, 206 #endif 207 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 208 ipcomp6_input, 0, 0, 0, 209 0, 210 0, 0, 0, 0, 211 &nousrreqs, 212 }, 213 #endif /* IPSEC */ 214 #ifdef INET 215 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 216 encap6_input, rip6_output, 0, rip6_ctloutput, 217 0, 218 0, 0, 0, 0, 219 &rip6_usrreqs 220 }, 221 #endif /*INET*/ 222 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 223 encap6_input, rip6_output, 0, rip6_ctloutput, 224 0, 225 #ifndef INET 226 encap_init, 0, 0, 0, 227 #else 228 0, 0, 0, 0, 229 #endif 230 &rip6_usrreqs 231 }, 232 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 233 pim6_input, rip6_output, 0, rip6_ctloutput, 234 0, 235 0, 0, 0, 0, 236 &rip6_usrreqs 237 }, 238 /* raw wildcard */ 239 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC | PR_ADDR, 240 rip6_input, rip6_output, 0, rip6_ctloutput, 241 0, 0, 242 0, 0, 0, 243 &rip6_usrreqs 244 }, 245 }; 246 247 #if NGIF > 0 248 struct ip6protosw in6_gif_protosw = 249 { SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 250 in6_gif_input, rip6_output, 0, rip6_ctloutput, 251 0, 252 0, 0, 0, 0, 253 &rip6_usrreqs 254 }; 255 #endif /*NGIF*/ 256 257 extern int in6_inithead __P((void **, int)); 258 259 struct domain inet6domain = 260 { AF_INET6, "internet6", 0, 0, 0, 261 (struct protosw *)inet6sw, 262 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 263 in6_inithead, 264 offsetof(struct sockaddr_in6, sin6_addr) << 3, 265 sizeof(struct sockaddr_in6) }; 266 267 DOMAIN_SET(inet6); 268 269 /* 270 * Internet configuration info 271 */ 272 #ifndef IPV6FORWARDING 273 #ifdef GATEWAY6 274 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 275 #else 276 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 277 #endif /* GATEWAY6 */ 278 #endif /* !IPV6FORWARDING */ 279 280 #ifndef IPV6_SENDREDIRECTS 281 #define IPV6_SENDREDIRECTS 1 282 #endif 283 284 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 285 int ip6_sendredirects = IPV6_SENDREDIRECTS; 286 int ip6_defhlim = IPV6_DEFHLIM; 287 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 288 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 289 int ip6_maxfragpackets = 200; 290 int ip6_log_interval = 5; 291 int ip6_hdrnestlimit = 50; /* appropriate? */ 292 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 293 u_int32_t ip6_flow_seq; 294 int ip6_auto_flowlabel = 1; 295 #if NGIF > 0 296 int ip6_gif_hlim = GIF_HLIM; 297 #else 298 int ip6_gif_hlim = 0; 299 #endif 300 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 301 int ip6_rr_prune = 5; /* router renumbering prefix 302 * walk list every 5 sec. */ 303 int ip6_mapped_addr_on = 1; 304 305 u_int32_t ip6_id = 0UL; 306 int ip6_keepfaith = 0; 307 time_t ip6_log_time = (time_t)0L; 308 309 /* icmp6 */ 310 /* 311 * BSDI4 defines these variables in in_proto.c... 312 * XXX: what if we don't define INET? Should we define pmtu6_expire 313 * or so? (jinmei@kame.net 19990310) 314 */ 315 int pmtu_expire = 60*10; 316 int pmtu_probe = 60*2; 317 318 /* raw IP6 parameters */ 319 /* 320 * Nominal space allocated to a raw ip socket. 321 */ 322 #define RIPV6SNDQ 8192 323 #define RIPV6RCVQ 8192 324 325 u_long rip6_sendspace = RIPV6SNDQ; 326 u_long rip6_recvspace = RIPV6RCVQ; 327 328 /* ICMPV6 parameters */ 329 int icmp6_rediraccept = 1; /* accept and process redirects */ 330 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 331 struct timeval icmp6errratelim = { 0, 0 }; /* no ratelimit */ 332 int icmp6errppslim = 100; /* 100pps */ 333 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 334 335 #ifdef TCP6 336 /* TCP on IP6 parameters */ 337 int tcp6_sendspace = 1024 * 8; 338 int tcp6_recvspace = 1024 * 8; 339 int tcp6_mssdflt = TCP6_MSS; 340 int tcp6_rttdflt = TCP6TV_SRTTDFLT / PR_SLOWHZ; 341 int tcp6_do_rfc1323 = 1; 342 int tcp6_conntimeo = TCP6TV_KEEP_INIT; /* initial connection timeout */ 343 int tcp6_43maxseg = 0; 344 int tcp6_pmtu = 0; 345 346 /* 347 * Parameters for keepalive option. 348 * Connections for which SO_KEEPALIVE is set will be probed 349 * after being idle for a time of tcp6_keepidle (in units of PR_SLOWHZ). 350 * Starting at that time, the connection is probed at intervals 351 * of tcp6_keepintvl (same units) until a response is received 352 * or until tcp6_keepcnt probes have been made, at which time 353 * the connection is dropped. Note that a tcp6_keepidle value 354 * under 2 hours is nonconformant with RFC-1122, Internet Host Requirements. 355 */ 356 int tcp6_keepidle = TCP6TV_KEEP_IDLE; /* time before probing idle */ 357 int tcp6_keepintvl = TCP6TV_KEEPINTVL; /* interval betwn idle probes */ 358 int tcp6_keepcnt = TCP6TV_KEEPCNT; /* max idle probes */ 359 int tcp6_maxpersistidle = TCP6TV_KEEP_IDLE; /* max idle time in persist */ 360 361 #ifndef INET_SERVER 362 #define TCP6_LISTEN_HASH_SIZE 17 363 #define TCP6_CONN_HASH_SIZE 97 364 #define TCP6_SYN_HASH_SIZE 293 365 #define TCP6_SYN_BUCKET_SIZE 35 366 #else 367 #define TCP6_LISTEN_HASH_SIZE 97 368 #define TCP6_CONN_HASH_SIZE 9973 369 #define TCP6_SYN_HASH_SIZE 997 370 #define TCP6_SYN_BUCKET_SIZE 35 371 #endif 372 int tcp6_listen_hash_size = TCP6_LISTEN_HASH_SIZE; 373 int tcp6_conn_hash_size = TCP6_CONN_HASH_SIZE; 374 struct tcp6_hash_list tcp6_listen_hash[TCP6_LISTEN_HASH_SIZE], 375 tcp6_conn_hash[TCP6_CONN_HASH_SIZE]; 376 377 int tcp6_syn_cache_size = TCP6_SYN_HASH_SIZE; 378 int tcp6_syn_cache_limit = TCP6_SYN_HASH_SIZE*TCP6_SYN_BUCKET_SIZE; 379 int tcp6_syn_bucket_limit = 3*TCP6_SYN_BUCKET_SIZE; 380 struct syn_cache_head6 tcp6_syn_cache[TCP6_SYN_HASH_SIZE]; 381 struct syn_cache_head6 *tcp6_syn_cache_first; 382 int tcp6_syn_cache_interval = 8; /* runs timer every 4 seconds */ 383 int tcp6_syn_cache_timeo = TCP6TV_KEEP_INIT; 384 385 /* 386 * Parameters for computing a desirable data segment size 387 * given an upper bound (either interface MTU, or peer's MSS option)_. 388 * As applications tend to use a buffer size that is a multiple 389 * of kilobytes, try for something that divides evenly. However, 390 * do not round down too much. 391 * 392 * Round segment size down to a multiple of TCP6_ROUNDSIZE if this 393 * does not result in lowering by more than (size/TCP6_ROUNDFRAC). 394 * For example, round 536 to 512. Older versions of the system 395 * effectively used MCLBYTES (1K or 2K) as TCP6_ROUNDSIZE, with 396 * a value of 1 for TCP6_ROUNDFRAC (eliminating its effect). 397 * We round to a multiple of 256 for SLIP. 398 */ 399 #ifndef TCP6_ROUNDSIZE 400 #define TCP6_ROUNDSIZE 256 /* round to multiple of 256 */ 401 #endif 402 #ifndef TCP6_ROUNDFRAC 403 #define TCP6_ROUNDFRAC 10 /* round down at most N/10, or 10% */ 404 #endif 405 406 int tcp6_roundsize = TCP6_ROUNDSIZE; 407 int tcp6_roundfrac = TCP6_ROUNDFRAC; 408 #endif /*TCP6*/ 409 410 /* UDP on IP6 parameters */ 411 int udp6_sendspace = 9216; /* really max datagram size */ 412 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 413 /* 40 1K datagrams */ 414 415 /* 416 * sysctl related items. 417 */ 418 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0, 419 "Internet6 Family"); 420 421 /* net.inet6 */ 422 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6"); 423 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6"); 424 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6"); 425 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6"); 426 #ifdef IPSEC 427 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6"); 428 #endif /* IPSEC */ 429 430 /* net.inet6.ip6 */ 431 static int 432 sysctl_ip6_forwarding(SYSCTL_HANDLER_ARGS) 433 { 434 int error = 0; 435 int old_ip6_forwarding; 436 int changed; 437 438 error = SYSCTL_OUT(req, arg1, sizeof(int)); 439 if (error || !req->newptr) 440 return (error); 441 old_ip6_forwarding = ip6_forwarding; 442 error = SYSCTL_IN(req, arg1, sizeof(int)); 443 if (error != 0) 444 return (error); 445 changed = (ip6_forwarding ? 1 : 0) ^ (old_ip6_forwarding ? 1 : 0); 446 if (changed == 0) 447 return (error); 448 /* 449 * XXX while host->router removes prefix got from RA, 450 * router->host case nukes all the prefixes managed by in6_prefix.c 451 * (both RR and static). therefore, switching from host->router->host 452 * will remove statically configured addresses/prefixes. 453 * not sure if it is intended behavior or not. 454 */ 455 if (ip6_forwarding != 0) { /* host becomes router */ 456 int s = splnet(); 457 struct nd_prefix *pr, *next; 458 459 for (pr = nd_prefix.lh_first; pr; pr = next) { 460 next = pr->ndpr_next; 461 if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr)) 462 in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr); 463 prelist_remove(pr); 464 } 465 splx(s); 466 } else { /* router becomes host */ 467 while(!LIST_EMPTY(&rr_prefix)) 468 delete_each_prefix(LIST_FIRST(&rr_prefix), 469 PR_ORIG_KERNEL); 470 } 471 472 return (error); 473 } 474 475 static int 476 sysctl_icmp6_ratelimit (SYSCTL_HANDLER_ARGS) 477 { 478 int rate_usec, error, s; 479 480 /* 481 * The sysctl specifies the rate in usec-between-icmp, 482 * so we must convert from/to a timeval. 483 */ 484 rate_usec = (icmp6errratelim.tv_sec * 1000000) + 485 icmp6errratelim.tv_usec; 486 error = sysctl_handle_int(oidp, &rate_usec, 0, req); 487 if (error) 488 return (error); 489 if (rate_usec < 0) 490 return (EINVAL); 491 s = splnet(); 492 icmp6errratelim.tv_sec = rate_usec / 1000000; 493 icmp6errratelim.tv_usec = rate_usec % 1000000; 494 splx(s); 495 496 return (0); 497 } 498 499 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 500 CTLTYPE_INT|CTLFLAG_RW, &ip6_forwarding, 0, sysctl_ip6_forwarding, 501 "I", ""); 502 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, 503 redirect, CTLFLAG_RW, &ip6_sendredirects, 0, ""); 504 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, 505 hlim, CTLFLAG_RW, &ip6_defhlim, 0, ""); 506 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, 507 maxfragpackets, CTLFLAG_RW, &ip6_maxfragpackets, 0, ""); 508 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, 509 accept_rtadv, CTLFLAG_RW, &ip6_accept_rtadv, 0, ""); 510 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH, 511 keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0, ""); 512 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, 513 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, ""); 514 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, 515 hdrnestlimit, CTLFLAG_RW, &ip6_hdrnestlimit, 0, ""); 516 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, 517 dad_count, CTLFLAG_RW, &ip6_dad_count, 0, ""); 518 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, 519 auto_flowlabel, CTLFLAG_RW, &ip6_auto_flowlabel, 0, ""); 520 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, 521 defmcasthlim, CTLFLAG_RW, &ip6_defmcasthlim, 0, ""); 522 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM, 523 gifhlim, CTLFLAG_RW, &ip6_gif_hlim, 0, ""); 524 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, 525 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, ""); 526 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, 527 use_deprecated, CTLFLAG_RW, &ip6_use_deprecated, 0, ""); 528 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, 529 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, ""); 530 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAPPED_ADDR, 531 mapped_addr, CTLFLAG_RW, &ip6_mapped_addr_on, 0, ""); 532 533 /* net.inet6.icmp6 */ 534 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, 535 rediraccept, CTLFLAG_RW, &icmp6_rediraccept, 0, ""); 536 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, 537 redirtimeout, CTLFLAG_RW, &icmp6_redirtimeout, 0, ""); 538 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD, 539 &icmp6stat, icmp6stat, ""); 540 SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ERRRATELIMIT, 541 errratelimit, CTLTYPE_INT|CTLFLAG_RW, 542 0, sizeof(int), sysctl_icmp6_ratelimit, "I", ""); 543 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, 544 nd6_prune, CTLFLAG_RW, &nd6_prune, 0, ""); 545 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, 546 nd6_delay, CTLFLAG_RW, &nd6_delay, 0, ""); 547 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, 548 nd6_umaxtries, CTLFLAG_RW, &nd6_umaxtries, 0, ""); 549 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, 550 nd6_mmaxtries, CTLFLAG_RW, &nd6_mmaxtries, 0, ""); 551 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, 552 nd6_useloopback, CTLFLAG_RW, &nd6_useloopback, 0, ""); 553 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, 554 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, ""); 555 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, 556 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0, ""); 557 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, 558 nd6_maxnudhint, CTLFLAG_RW, &nd6_maxnudhint, 0, ""); 559