in6_rmx.c revision 195699
1139826Simp/*- 253541Sshin * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 353541Sshin * All rights reserved. 453541Sshin * 553541Sshin * Redistribution and use in source and binary forms, with or without 653541Sshin * modification, are permitted provided that the following conditions 753541Sshin * are met: 853541Sshin * 1. Redistributions of source code must retain the above copyright 953541Sshin * notice, this list of conditions and the following disclaimer. 1053541Sshin * 2. Redistributions in binary form must reproduce the above copyright 1153541Sshin * notice, this list of conditions and the following disclaimer in the 1253541Sshin * documentation and/or other materials provided with the distribution. 1353541Sshin * 3. Neither the name of the project nor the names of its contributors 1453541Sshin * may be used to endorse or promote products derived from this software 1553541Sshin * without specific prior written permission. 1653541Sshin * 1753541Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1853541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1953541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2053541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2153541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2253541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2353541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2453541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2553541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2653541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2753541Sshin * SUCH DAMAGE. 28174510Sobrien * 29174510Sobrien * $KAME: in6_rmx.c,v 1.11 2001/07/26 06:53:16 jinmei Exp $ 3053541Sshin */ 3153541Sshin 32139826Simp/*- 3353541Sshin * Copyright 1994, 1995 Massachusetts Institute of Technology 3453541Sshin * 3553541Sshin * Permission to use, copy, modify, and distribute this software and 3653541Sshin * its documentation for any purpose and without fee is hereby 3753541Sshin * granted, provided that both the above copyright notice and this 3853541Sshin * permission notice appear in all copies, that both the above 3953541Sshin * copyright notice and this permission notice appear in all 4053541Sshin * supporting documentation, and that the name of M.I.T. not be used 4153541Sshin * in advertising or publicity pertaining to distribution of the 4253541Sshin * software without specific, written prior permission. M.I.T. makes 4353541Sshin * no representations about the suitability of this software for any 4453541Sshin * purpose. It is provided "as is" without express or implied 4553541Sshin * warranty. 4653541Sshin * 4753541Sshin * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 4853541Sshin * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 4953541Sshin * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 5053541Sshin * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 5153541Sshin * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 5253541Sshin * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 5353541Sshin * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 5453541Sshin * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 5553541Sshin * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 5653541Sshin * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 5753541Sshin * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5853541Sshin * SUCH DAMAGE. 5953541Sshin * 6053541Sshin */ 6153541Sshin 6253541Sshin/* 6353541Sshin * This code does two things necessary for the enhanced TCP metrics to 6453541Sshin * function in a useful manner: 6553541Sshin * 1) It marks all non-host routes as `cloning', thus ensuring that 6653541Sshin * every actual reference to such a route actually gets turned 6753541Sshin * into a reference to a host route to the specific destination 6853541Sshin * requested. 6953541Sshin * 2) When such routes lose all their references, it arranges for them 7053541Sshin * to be deleted in some random collection of circumstances, so that 7153541Sshin * a large quantity of stale routing data is not kept in kernel memory 7253541Sshin * indefinitely. See in6_rtqtimo() below for the exact mechanism. 7353541Sshin */ 7453541Sshin 75174510Sobrien#include <sys/cdefs.h> 76174510Sobrien__FBSDID("$FreeBSD: head/sys/netinet6/in6_rmx.c 195699 2009-07-14 22:48:30Z rwatson $"); 77174510Sobrien 7853541Sshin#include <sys/param.h> 7953541Sshin#include <sys/systm.h> 8053541Sshin#include <sys/kernel.h> 81185751Simp#include <sys/lock.h> 8253541Sshin#include <sys/sysctl.h> 8353541Sshin#include <sys/queue.h> 8453541Sshin#include <sys/socket.h> 8553541Sshin#include <sys/socketvar.h> 8653541Sshin#include <sys/mbuf.h> 87185747Skmacy#include <sys/rwlock.h> 8853541Sshin#include <sys/syslog.h> 89120727Ssam#include <sys/callout.h> 90181803Sbz#include <sys/vimage.h> 9153541Sshin 9253541Sshin#include <net/if.h> 93194714Sbz#include <net/route.h> 94185571Sbz 9553541Sshin#include <netinet/in.h> 9653541Sshin#include <netinet/ip_var.h> 9753541Sshin#include <netinet/in_var.h> 9853541Sshin 9962587Sitojun#include <netinet/ip6.h> 10053541Sshin#include <netinet6/ip6_var.h> 10153541Sshin 10262587Sitojun#include <netinet/icmp6.h> 103121283Sume#include <netinet6/nd6.h> 10453541Sshin 10553541Sshin#include <netinet/tcp.h> 10653541Sshin#include <netinet/tcp_seq.h> 10753541Sshin#include <netinet/tcp_timer.h> 10853541Sshin#include <netinet/tcp_var.h> 10953541Sshin 110175162Sobrienextern int in6_inithead(void **head, int off); 111193731Szec#ifdef VIMAGE 112193731Szecextern int in6_detachhead(void **head, int off); 113193731Szec#endif 11453541Sshin 11562587Sitojun#define RTPRF_OURS RTF_PROTO3 /* set on routes we manage */ 11653541Sshin 11753541Sshin/* 11853541Sshin * Do what we need to do when inserting a route. 11953541Sshin */ 12053541Sshinstatic struct radix_node * 12153541Sshinin6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, 122171260Sdelphij struct radix_node *treenodes) 12353541Sshin{ 12453541Sshin struct rtentry *rt = (struct rtentry *)treenodes; 12553541Sshin struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)rt_key(rt); 12653541Sshin struct radix_node *ret; 12753541Sshin 128186119Sqingli RADIX_NODE_HEAD_WLOCK_ASSERT(head); 12953541Sshin if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 13053541Sshin rt->rt_flags |= RTF_MULTICAST; 13153541Sshin 13253541Sshin /* 13353541Sshin * A little bit of help for both IPv6 output and input: 13453541Sshin * For local addresses, we make sure that RTF_LOCAL is set, 13553541Sshin * with the thought that this might one day be used to speed up 13653541Sshin * ip_input(). 13753541Sshin * 13853541Sshin * We also mark routes to multicast addresses as such, because 13953541Sshin * it's easy to do and might be useful (but this is much more 14053541Sshin * dubious since it's so easy to inspect the address). (This 14153541Sshin * is done above.) 14253541Sshin * 14353541Sshin * XXX 14453541Sshin * should elaborate the code. 14553541Sshin */ 14653541Sshin if (rt->rt_flags & RTF_HOST) { 14753541Sshin if (IN6_ARE_ADDR_EQUAL(&satosin6(rt->rt_ifa->ifa_addr) 14853541Sshin ->sin6_addr, 14953541Sshin &sin6->sin6_addr)) { 15053541Sshin rt->rt_flags |= RTF_LOCAL; 15153541Sshin } 15253541Sshin } 15353541Sshin 154122922Sandre if (!rt->rt_rmx.rmx_mtu && rt->rt_ifp) 155121283Sume rt->rt_rmx.rmx_mtu = IN6_LINKMTU(rt->rt_ifp); 15653541Sshin 15753541Sshin ret = rn_addroute(v_arg, n_arg, head, treenodes); 158186119Sqingli if (ret == NULL) { 15953541Sshin struct rtentry *rt2; 16053541Sshin /* 16153541Sshin * We are trying to add a net route, but can't. 16253541Sshin * The following case should be allowed, so we'll make a 16353541Sshin * special check for this: 16453541Sshin * Two IPv6 addresses with the same prefix is assigned 16553541Sshin * to a single interrface. 16653541Sshin * # ifconfig if0 inet6 3ffe:0501::1 prefix 64 alias (*1) 16753541Sshin * # ifconfig if0 inet6 3ffe:0501::2 prefix 64 alias (*2) 16853541Sshin * In this case, (*1) and (*2) want to add the same 16953541Sshin * net route entry, 3ffe:0501:: -> if0. 17053541Sshin * This case should not raise an error. 17153541Sshin */ 172186119Sqingli rt2 = rtalloc1((struct sockaddr *)sin6, 0, RTF_RNH_LOCKED); 17353541Sshin if (rt2) { 174186119Sqingli if (((rt2->rt_flags & (RTF_HOST|RTF_GATEWAY)) == 0) 17553541Sshin && rt2->rt_gateway 17653541Sshin && rt2->rt_gateway->sa_family == AF_LINK 17753541Sshin && rt2->rt_ifp == rt->rt_ifp) { 17853541Sshin ret = rt2->rt_nodes; 17953541Sshin } 180120727Ssam RTFREE_LOCKED(rt2); 18153541Sshin } 18253541Sshin } 183186119Sqingli return (ret); 18453541Sshin} 18553541Sshin 18653541Sshin/* 18753541Sshin * This code is the inverse of in6_clsroute: on first reference, if we 18853541Sshin * were managing the route, stop doing so and set the expiration timer 18953541Sshin * back off again. 19053541Sshin */ 19153541Sshinstatic struct radix_node * 19253541Sshinin6_matroute(void *v_arg, struct radix_node_head *head) 19353541Sshin{ 19453541Sshin struct radix_node *rn = rn_match(v_arg, head); 19553541Sshin struct rtentry *rt = (struct rtentry *)rn; 19653541Sshin 19753541Sshin if (rt && rt->rt_refcnt == 0) { /* this is first reference */ 19853541Sshin if (rt->rt_flags & RTPRF_OURS) { 19953541Sshin rt->rt_flags &= ~RTPRF_OURS; 20053541Sshin rt->rt_rmx.rmx_expire = 0; 20153541Sshin } 20253541Sshin } 20353541Sshin return rn; 20453541Sshin} 20553541Sshin 20662604SitojunSYSCTL_DECL(_net_inet6_ip6); 20762604Sitojun 208195699Srwatsonstatic VNET_DEFINE(int, rtq_reallyold6); 209195699Srwatsonstatic VNET_DEFINE(int, rtq_minreallyold6); 210195699Srwatsonstatic VNET_DEFINE(int, rtq_toomany6); 211185088Szec 212195699Srwatson#define V_rtq_reallyold6 VNET_GET(rtq_reallyold6) 213195699Srwatson#define V_rtq_minreallyold6 VNET_GET(rtq_minreallyold6) 214195699Srwatson#define V_rtq_toomany6 VNET_GET(rtq_toomany6) 215120913Sume 216195699SrwatsonSYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_RTEXPIRE, rtexpire, CTLFLAG_RW, 217195699Srwatson &VNET_NAME(rtq_reallyold6) , 0, ""); 218120913Sume 219195699SrwatsonSYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_RTMINEXPIRE, rtminexpire, CTLFLAG_RW, 220195699Srwatson &VNET_NAME(rtq_minreallyold6) , 0, ""); 22153541Sshin 222195699SrwatsonSYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_RTMAXCACHE, rtmaxcache, CTLFLAG_RW, 223195699Srwatson &VNET_NAME(rtq_toomany6) , 0, ""); 224120913Sume 22553541Sshinstruct rtqk_arg { 22653541Sshin struct radix_node_head *rnh; 22753541Sshin int mode; 22853541Sshin int updating; 22953541Sshin int draining; 23053541Sshin int killed; 23153541Sshin int found; 23253541Sshin time_t nextstop; 23353541Sshin}; 23453541Sshin 23553541Sshin/* 23653541Sshin * Get rid of old routes. When draining, this deletes everything, even when 23753541Sshin * the timeout is not expired yet. When updating, this makes sure that 238181832Sbz * nothing has a timeout longer than the current value of rtq_reallyold6. 23953541Sshin */ 24053541Sshinstatic int 24153541Sshinin6_rtqkill(struct radix_node *rn, void *rock) 24253541Sshin{ 24353541Sshin struct rtqk_arg *ap = rock; 24453541Sshin struct rtentry *rt = (struct rtentry *)rn; 24553541Sshin int err; 24653541Sshin 247188963Srwatson RADIX_NODE_HEAD_WLOCK_ASSERT(ap->rnh); 248188963Srwatson 24953541Sshin if (rt->rt_flags & RTPRF_OURS) { 25053541Sshin ap->found++; 25153541Sshin 252150351Sandre if (ap->draining || rt->rt_rmx.rmx_expire <= time_uptime) { 25353541Sshin if (rt->rt_refcnt > 0) 25453541Sshin panic("rtqkill route really not free"); 25553541Sshin 25653541Sshin err = rtrequest(RTM_DELETE, 25753541Sshin (struct sockaddr *)rt_key(rt), 25853541Sshin rt->rt_gateway, rt_mask(rt), 259186119Sqingli rt->rt_flags|RTF_RNH_LOCKED, 0); 26053541Sshin if (err) { 26153541Sshin log(LOG_WARNING, "in6_rtqkill: error %d", err); 26253541Sshin } else { 26353541Sshin ap->killed++; 26453541Sshin } 26553541Sshin } else { 26653541Sshin if (ap->updating 267150351Sandre && (rt->rt_rmx.rmx_expire - time_uptime 268181832Sbz > V_rtq_reallyold6)) { 269150351Sandre rt->rt_rmx.rmx_expire = time_uptime 270181832Sbz + V_rtq_reallyold6; 27153541Sshin } 27253541Sshin ap->nextstop = lmin(ap->nextstop, 27353541Sshin rt->rt_rmx.rmx_expire); 27453541Sshin } 27553541Sshin } 27653541Sshin 27753541Sshin return 0; 27853541Sshin} 27953541Sshin 28053541Sshin#define RTQ_TIMEOUT 60*10 /* run no less than once every ten minutes */ 281195699Srwatsonstatic VNET_DEFINE(int, rtq_timeout6); 282195699Srwatsonstatic VNET_DEFINE(struct callout, rtq_timer6); 28353541Sshin 284195699Srwatson#define V_rtq_timeout6 VNET_GET(rtq_timeout6) 285195699Srwatson#define V_rtq_timer6 VNET_GET(rtq_timer6) 286195699Srwatson 28753541Sshinstatic void 28853541Sshinin6_rtqtimo(void *rock) 28953541Sshin{ 290183550Szec CURVNET_SET_QUIET((struct vnet *) rock); 291193232Sbz struct radix_node_head *rnh; 29253541Sshin struct rtqk_arg arg; 29353541Sshin struct timeval atv; 29453541Sshin static time_t last_adjusted_timeout = 0; 29553541Sshin 296193232Sbz rnh = rt_tables_get_rnh(0, AF_INET6); 297193232Sbz if (rnh == NULL) { 298193232Sbz CURVNET_RESTORE(); 299193232Sbz return; 300193232Sbz } 30153541Sshin arg.found = arg.killed = 0; 30253541Sshin arg.rnh = rnh; 303181803Sbz arg.nextstop = time_uptime + V_rtq_timeout6; 30453541Sshin arg.draining = arg.updating = 0; 305108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 30653541Sshin rnh->rnh_walktree(rnh, in6_rtqkill, &arg); 307108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 30853541Sshin 30953541Sshin /* 31053541Sshin * Attempt to be somewhat dynamic about this: 31153541Sshin * If there are ``too many'' routes sitting around taking up space, 31253541Sshin * then crank down the timeout, and see if we can't make some more 31353541Sshin * go away. However, we make sure that we will never adjust more 314180084Sjulian * than once in rtq_timeout6 seconds, to keep from cranking down too 31553541Sshin * hard. 31653541Sshin */ 317181832Sbz if ((arg.found - arg.killed > V_rtq_toomany6) 318181803Sbz && (time_uptime - last_adjusted_timeout >= V_rtq_timeout6) 319181832Sbz && V_rtq_reallyold6 > V_rtq_minreallyold6) { 320181832Sbz V_rtq_reallyold6 = 2*V_rtq_reallyold6 / 3; 321181832Sbz if (V_rtq_reallyold6 < V_rtq_minreallyold6) { 322181832Sbz V_rtq_reallyold6 = V_rtq_minreallyold6; 32353541Sshin } 32453541Sshin 325160123Soleg last_adjusted_timeout = time_uptime; 32653541Sshin#ifdef DIAGNOSTIC 327181832Sbz log(LOG_DEBUG, "in6_rtqtimo: adjusted rtq_reallyold6 to %d", 328181832Sbz V_rtq_reallyold6); 32953541Sshin#endif 33053541Sshin arg.found = arg.killed = 0; 33153541Sshin arg.updating = 1; 332108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 33353541Sshin rnh->rnh_walktree(rnh, in6_rtqkill, &arg); 334108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 33553541Sshin } 33653541Sshin 33753541Sshin atv.tv_usec = 0; 338160123Soleg atv.tv_sec = arg.nextstop - time_uptime; 339181803Sbz callout_reset(&V_rtq_timer6, tvtohz(&atv), in6_rtqtimo, rock); 340183550Szec CURVNET_RESTORE(); 34153541Sshin} 34253541Sshin 34353541Sshin/* 34453541Sshin * Age old PMTUs. 34553541Sshin */ 34653541Sshinstruct mtuex_arg { 34753541Sshin struct radix_node_head *rnh; 34853541Sshin time_t nextstop; 34953541Sshin}; 35053541Sshin 351195699Srwatsonstatic VNET_DEFINE(struct callout, rtq_mtutimer); 352195699Srwatson#define V_rtq_mtutimer VNET_GET(rtq_mtutimer) 353195699Srwatson 35453541Sshinstatic int 35553541Sshinin6_mtuexpire(struct radix_node *rn, void *rock) 35653541Sshin{ 35753541Sshin struct rtentry *rt = (struct rtentry *)rn; 35853541Sshin struct mtuex_arg *ap = rock; 35953541Sshin 36053541Sshin /* sanity */ 36153541Sshin if (!rt) 36253541Sshin panic("rt == NULL in in6_mtuexpire"); 36353541Sshin 36453541Sshin if (rt->rt_rmx.rmx_expire && !(rt->rt_flags & RTF_PROBEMTU)) { 365150351Sandre if (rt->rt_rmx.rmx_expire <= time_uptime) { 36653541Sshin rt->rt_flags |= RTF_PROBEMTU; 36753541Sshin } else { 36853541Sshin ap->nextstop = lmin(ap->nextstop, 36953541Sshin rt->rt_rmx.rmx_expire); 37053541Sshin } 37153541Sshin } 37253541Sshin 37353541Sshin return 0; 37453541Sshin} 37553541Sshin 37653541Sshin#define MTUTIMO_DEFAULT (60*1) 37753541Sshin 37853541Sshinstatic void 37953541Sshinin6_mtutimo(void *rock) 38053541Sshin{ 381183550Szec CURVNET_SET_QUIET((struct vnet *) rock); 382193232Sbz struct radix_node_head *rnh; 38353541Sshin struct mtuex_arg arg; 38453541Sshin struct timeval atv; 38553541Sshin 386193232Sbz rnh = rt_tables_get_rnh(0, AF_INET6); 387193232Sbz if (rnh == NULL) { 388193232Sbz CURVNET_RESTORE(); 389193232Sbz return; 390193232Sbz } 39153541Sshin arg.rnh = rnh; 392160123Soleg arg.nextstop = time_uptime + MTUTIMO_DEFAULT; 393108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 39453541Sshin rnh->rnh_walktree(rnh, in6_mtuexpire, &arg); 395108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 39653541Sshin 39753541Sshin atv.tv_usec = 0; 398160123Soleg atv.tv_sec = arg.nextstop - time_uptime; 399136184Ssuz if (atv.tv_sec < 0) { 40053541Sshin printf("invalid mtu expiration time on routing table\n"); 401160123Soleg arg.nextstop = time_uptime + 30; /* last resort */ 402160123Soleg atv.tv_sec = 30; 40353541Sshin } 404181803Sbz callout_reset(&V_rtq_mtutimer, tvtohz(&atv), in6_mtutimo, rock); 405183550Szec CURVNET_RESTORE(); 40653541Sshin} 40753541Sshin 40853541Sshin/* 40953541Sshin * Initialize our routing tree. 410178888Sjulian * XXX MRT When off == 0, we are being called from vfs_export.c 411178888Sjulian * so just set up their table and leave. (we know what the correct 412178888Sjulian * value should be so just use that).. FIX AFTER RELENG_7 is MFC'd 413178888Sjulian * see also comments in in_inithead() vfs_export.c and domain.h 41453541Sshin */ 41553541Sshinint 41653541Sshinin6_inithead(void **head, int off) 41753541Sshin{ 41853541Sshin struct radix_node_head *rnh; 41953541Sshin 420178888Sjulian if (!rn_inithead(head, offsetof(struct sockaddr_in6, sin6_addr) << 3)) 421178888Sjulian return 0; /* See above */ 42253541Sshin 423178888Sjulian if (off == 0) /* See above */ 424178888Sjulian return 1; /* only do the rest for the real thing */ 42553541Sshin 426185088Szec V_rtq_reallyold6 = 60*60; /* one hour is ``really old'' */ 427185088Szec V_rtq_minreallyold6 = 10; /* never automatically crank down to less */ 428185088Szec V_rtq_toomany6 = 128; /* 128 cached routes is ``too many'' */ 429185088Szec V_rtq_timeout6 = RTQ_TIMEOUT; 430185088Szec 43153541Sshin rnh = *head; 432193232Sbz KASSERT(rnh == rt_tables_get_rnh(0, AF_INET6), ("rnh?")); 43353541Sshin rnh->rnh_addaddr = in6_addroute; 43453541Sshin rnh->rnh_matchaddr = in6_matroute; 435181803Sbz callout_init(&V_rtq_timer6, CALLOUT_MPSAFE); 436181803Sbz callout_init(&V_rtq_mtutimer, CALLOUT_MPSAFE); 437191816Szec in6_rtqtimo(curvnet); /* kick off timeout first time */ 438191816Szec in6_mtutimo(curvnet); /* kick off timeout first time */ 43953541Sshin return 1; 44053541Sshin} 441193731Szec 442193731Szec#ifdef VIMAGE 443193731Szecint 444193731Szecin6_detachhead(void **head, int off) 445193731Szec{ 446193731Szec 447193731Szec callout_drain(&V_rtq_timer6); 448193731Szec callout_drain(&V_rtq_mtutimer); 449193731Szec return (1); 450193731Szec} 451193731Szec#endif 452