Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 3615 insertions, 0 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
new file mode 100644
index 000000000000..5ffde14ddc09
--- /dev/null
+++ b/net/ipv6/addrconf.c
@@ -0,0 +1,3615 @@
+/*
+ *	IPv6 Address [auto]configuration
+ *	Linux INET6 implementation
+ *
+ *	Authors:
+ *	Pedro Roque		<roque@di.fc.ul.pt>	
+ *	Alexey Kuznetsov	<kuznet@ms2.inr.ac.ru>
+ *
+ *	$Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
+ *
+ *	This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+/*
+ *	Changes:
+ *
+ *	Janos Farkas			:	delete timer on ifdown
+ *	<chexum@bankinf.banki.hu>
+ *	Andi Kleen			:	kill double kfree on module
+ *						unload.
+ *	Maciej W. Rozycki		:	FDDI support
+ *	sekiya@USAGI			:	Don't send too many RS
+ *						packets.
+ *	yoshfuji@USAGI			:       Fixed interval between DAD
+ *						packets.
+ *	YOSHIFUJI Hideaki @USAGI	:	improved accuracy of
+ *						address validation timer.
+ *	YOSHIFUJI Hideaki @USAGI	:	Privacy Extensions (RFC3041)
+ *						support.
+ *	Yuji SEKIYA @USAGI		:	Don't assign a same IPv6
+ *						address on a same interface.
+ *	YOSHIFUJI Hideaki @USAGI	:	ARCnet support
+ *	YOSHIFUJI Hideaki @USAGI	:	convert /proc/net/if_inet6 to
+ *						seq_file.
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/sched.h>
+#include <linux/net.h>
+#include <linux/in6.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/if_arcnet.h>
+#include <linux/if_infiniband.h>
+#include <linux/route.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+#include <linux/delay.h>
+#include <linux/notifier.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/protocol.h>
+#include <net/ndisc.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#include <net/tcp.h>
+#include <net/ip.h>
+#include <linux/if_tunnel.h>
+#include <linux/rtnetlink.h>
+
+#ifdef CONFIG_IPV6_PRIVACY
+#include <linux/random.h>
+#include <linux/crypto.h>
+#include <asm/scatterlist.h>
+#endif
+
+#include <asm/uaccess.h>
+
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+/* Set to 3 to get tracing... */
+#define ACONF_DEBUG 2
+
+#if ACONF_DEBUG >= 3
+#define ADBG(x) printk x
+#else
+#define ADBG(x)
+#endif
+
+#define	INFINITY_LIFE_TIME	0xFFFFFFFF
+#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
+
+#ifdef CONFIG_SYSCTL
+static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
+static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
+#endif
+
+#ifdef CONFIG_IPV6_PRIVACY
+static int __ipv6_regen_rndid(struct inet6_dev *idev);
+static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); 
+static void ipv6_regen_rndid(unsigned long data);
+
+static int desync_factor = MAX_DESYNC_FACTOR * HZ;
+static struct crypto_tfm *md5_tfm;
+static DEFINE_SPINLOCK(md5_tfm_lock);
+#endif
+
+static int ipv6_count_addresses(struct inet6_dev *idev);
+
+/*
+ *	Configured unicast address hash table
+ */
+static struct inet6_ifaddr		*inet6_addr_lst[IN6_ADDR_HSIZE];
+static DEFINE_RWLOCK(addrconf_hash_lock);
+
+/* Protects inet6 devices */
+DEFINE_RWLOCK(addrconf_lock);
+
+static void addrconf_verify(unsigned long);
+
+static struct timer_list addr_chk_timer =
+			TIMER_INITIALIZER(addrconf_verify, 0, 0);
+static DEFINE_SPINLOCK(addrconf_verify_lock);
+
+static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
+static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
+
+static int addrconf_ifdown(struct net_device *dev, int how);
+
+static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
+static void addrconf_dad_timer(unsigned long data);
+static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
+static void addrconf_rs_timer(unsigned long data);
+static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
+static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
+
+static void inet6_prefix_notify(int event, struct inet6_dev *idev, 
+				struct prefix_info *pinfo);
+static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
+
+static struct notifier_block *inet6addr_chain;
+
+struct ipv6_devconf ipv6_devconf = {
+	.forwarding		= 0,
+	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
+	.mtu6			= IPV6_MIN_MTU,
+	.accept_ra		= 1,
+	.accept_redirects	= 1,
+	.autoconf		= 1,
+	.force_mld_version	= 0,
+	.dad_transmits		= 1,
+	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
+	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
+	.rtr_solicit_delay	= MAX_RTR_SOLICITATION_DELAY,
+#ifdef CONFIG_IPV6_PRIVACY
+	.use_tempaddr 		= 0,
+	.temp_valid_lft		= TEMP_VALID_LIFETIME,
+	.temp_prefered_lft	= TEMP_PREFERRED_LIFETIME,
+	.regen_max_retry	= REGEN_MAX_RETRY,
+	.max_desync_factor	= MAX_DESYNC_FACTOR,
+#endif
+	.max_addresses		= IPV6_MAX_ADDRESSES,
+};
+
+static struct ipv6_devconf ipv6_devconf_dflt = {
+	.forwarding		= 0,
+	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
+	.mtu6			= IPV6_MIN_MTU,
+	.accept_ra		= 1,
+	.accept_redirects	= 1,
+	.autoconf		= 1,
+	.dad_transmits		= 1,
+	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
+	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
+	.rtr_solicit_delay	= MAX_RTR_SOLICITATION_DELAY,
+#ifdef CONFIG_IPV6_PRIVACY
+	.use_tempaddr		= 0,
+	.temp_valid_lft		= TEMP_VALID_LIFETIME,
+	.temp_prefered_lft	= TEMP_PREFERRED_LIFETIME,
+	.regen_max_retry	= REGEN_MAX_RETRY,
+	.max_desync_factor	= MAX_DESYNC_FACTOR,
+#endif
+	.max_addresses		= IPV6_MAX_ADDRESSES,
+};
+
+/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
+#if 0
+const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
+#endif
+const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
+
+int ipv6_addr_type(const struct in6_addr *addr)
+{
+	int type;
+	u32 st;
+
+	st = addr->s6_addr32[0];
+
+	if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
+		type = IPV6_ADDR_MULTICAST;
+
+		switch((st & htonl(0x00FF0000))) {
+			case __constant_htonl(0x00010000):
+				type |= IPV6_ADDR_LOOPBACK;
+				break;
+
+			case __constant_htonl(0x00020000):
+				type |= IPV6_ADDR_LINKLOCAL;
+				break;
+
+			case __constant_htonl(0x00050000):
+				type |= IPV6_ADDR_SITELOCAL;
+				break;
+		};
+		return type;
+	}
+
+	type = IPV6_ADDR_UNICAST;
+
+	/* Consider all addresses with the first three bits different of
+	   000 and 111 as finished.
+	 */
+	if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
+	    (st & htonl(0xE0000000)) != htonl(0xE0000000))
+		return type;
+	
+	if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
+		return (IPV6_ADDR_LINKLOCAL | type);
+
+	if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
+		return (IPV6_ADDR_SITELOCAL | type);
+
+	if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
+		if (addr->s6_addr32[2] == 0) {
+			if (addr->s6_addr32[3] == 0)
+				return IPV6_ADDR_ANY;
+
+			if (addr->s6_addr32[3] == htonl(0x00000001))
+				return (IPV6_ADDR_LOOPBACK | type);
+
+			return (IPV6_ADDR_COMPATv4 | type);
+		}
+
+		if (addr->s6_addr32[2] == htonl(0x0000ffff))
+			return IPV6_ADDR_MAPPED;
+	}
+
+	st &= htonl(0xFF000000);
+	if (st == 0)
+		return IPV6_ADDR_RESERVED;
+	st &= htonl(0xFE000000);
+	if (st == htonl(0x02000000))
+		return IPV6_ADDR_RESERVED;	/* for NSAP */
+	if (st == htonl(0x04000000))
+		return IPV6_ADDR_RESERVED;	/* for IPX */
+	return type;
+}
+
+static void addrconf_del_timer(struct inet6_ifaddr *ifp)
+{
+	if (del_timer(&ifp->timer))
+		__in6_ifa_put(ifp);
+}
+
+enum addrconf_timer_t
+{
+	AC_NONE,
+	AC_DAD,
+	AC_RS,
+};
+
+static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
+			       enum addrconf_timer_t what,
+			       unsigned long when)
+{
+	if (!del_timer(&ifp->timer))
+		in6_ifa_hold(ifp);
+
+	switch (what) {
+	case AC_DAD:
+		ifp->timer.function = addrconf_dad_timer;
+		break;
+	case AC_RS:
+		ifp->timer.function = addrconf_rs_timer;
+		break;
+	default:;
+	}
+	ifp->timer.expires = jiffies + when;
+	add_timer(&ifp->timer);
+}
+
+/* Nobody refers to this device, we may destroy it. */
+
+void in6_dev_finish_destroy(struct inet6_dev *idev)
+{
+	struct net_device *dev = idev->dev;
+	BUG_TRAP(idev->addr_list==NULL);
+	BUG_TRAP(idev->mc_list==NULL);
+#ifdef NET_REFCNT_DEBUG
+	printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
+#endif
+	dev_put(dev);
+	if (!idev->dead) {
+		printk("Freeing alive inet6 device %p\n", idev);
+		return;
+	}
+	snmp6_free_dev(idev);
+	kfree(idev);
+}
+
+static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
+{
+	struct inet6_dev *ndev;
+
+	ASSERT_RTNL();
+
+	if (dev->mtu < IPV6_MIN_MTU)
+		return NULL;
+
+	ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL);
+
+	if (ndev) {
+		memset(ndev, 0, sizeof(struct inet6_dev));
+
+		rwlock_init(&ndev->lock);
+		ndev->dev = dev;
+		memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
+		ndev->cnf.mtu6 = dev->mtu;
+		ndev->cnf.sysctl = NULL;
+		ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
+		if (ndev->nd_parms == NULL) {
+			kfree(ndev);
+			return NULL;
+		}
+		/* We refer to the device */
+		dev_hold(dev);
+
+		if (snmp6_alloc_dev(ndev) < 0) {
+			ADBG((KERN_WARNING
+				"%s(): cannot allocate memory for statistics; dev=%s.\n",
+				__FUNCTION__, dev->name));
+			neigh_parms_release(&nd_tbl, ndev->nd_parms);
+			ndev->dead = 1;
+			in6_dev_finish_destroy(ndev);
+			return NULL;
+		}
+
+		if (snmp6_register_dev(ndev) < 0) {
+			ADBG((KERN_WARNING
+				"%s(): cannot create /proc/net/dev_snmp6/%s\n",
+				__FUNCTION__, dev->name));
+			neigh_parms_release(&nd_tbl, ndev->nd_parms);
+			ndev->dead = 1;
+			in6_dev_finish_destroy(ndev);
+			return NULL;
+		}
+
+		/* One reference from device.  We must do this before
+		 * we invoke __ipv6_regen_rndid().
+		 */
+		in6_dev_hold(ndev);
+
+#ifdef CONFIG_IPV6_PRIVACY
+		get_random_bytes(ndev->rndid, sizeof(ndev->rndid));
+		get_random_bytes(ndev->entropy, sizeof(ndev->entropy));
+		init_timer(&ndev->regen_timer);
+		ndev->regen_timer.function = ipv6_regen_rndid;
+		ndev->regen_timer.data = (unsigned long) ndev;
+		if ((dev->flags&IFF_LOOPBACK) ||
+		    dev->type == ARPHRD_TUNNEL ||
+		    dev->type == ARPHRD_SIT) {
+			printk(KERN_INFO
+				"Disabled Privacy Extensions on device %p(%s)\n",
+				dev, dev->name);
+			ndev->cnf.use_tempaddr = -1;
+		} else {
+			in6_dev_hold(ndev);
+			ipv6_regen_rndid((unsigned long) ndev);
+		}
+#endif
+
+		write_lock_bh(&addrconf_lock);
+		dev->ip6_ptr = ndev;
+		write_unlock_bh(&addrconf_lock);
+
+		ipv6_mc_init_dev(ndev);
+		ndev->tstamp = jiffies;
+#ifdef CONFIG_SYSCTL
+		neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, 
+				      NET_IPV6_NEIGH, "ipv6",
+				      &ndisc_ifinfo_sysctl_change,
+				      NULL);
+		addrconf_sysctl_register(ndev, &ndev->cnf);
+#endif
+	}
+	return ndev;
+}
+
+static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
+{
+	struct inet6_dev *idev;
+
+	ASSERT_RTNL();
+
+	if ((idev = __in6_dev_get(dev)) == NULL) {
+		if ((idev = ipv6_add_dev(dev)) == NULL)
+			return NULL;
+	}
+	if (dev->flags&IFF_UP)
+		ipv6_mc_up(idev);
+	return idev;
+}
+
+#ifdef CONFIG_SYSCTL
+static void dev_forward_change(struct inet6_dev *idev)
+{
+	struct net_device *dev;
+	struct inet6_ifaddr *ifa;
+	struct in6_addr addr;
+
+	if (!idev)
+		return;
+	dev = idev->dev;
+	if (dev && (dev->flags & IFF_MULTICAST)) {
+		ipv6_addr_all_routers(&addr);
+	
+		if (idev->cnf.forwarding)
+			ipv6_dev_mc_inc(dev, &addr);
+		else
+			ipv6_dev_mc_dec(dev, &addr);
+	}
+	for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
+		if (idev->cnf.forwarding)
+			addrconf_join_anycast(ifa);
+		else
+			addrconf_leave_anycast(ifa);
+	}
+}
+
+
+static void addrconf_forward_change(void)
+{
+	struct net_device *dev;
+	struct inet6_dev *idev;
+
+	read_lock(&dev_base_lock);
+	for (dev=dev_base; dev; dev=dev->next) {
+		read_lock(&addrconf_lock);
+		idev = __in6_dev_get(dev);
+		if (idev) {
+			int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
+			idev->cnf.forwarding = ipv6_devconf.forwarding;
+			if (changed)
+				dev_forward_change(idev);
+		}
+		read_unlock(&addrconf_lock);
+	}
+	read_unlock(&dev_base_lock);
+}
+#endif
+
+/* Nobody refers to this ifaddr, destroy it */
+
+void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
+{
+	BUG_TRAP(ifp->if_next==NULL);
+	BUG_TRAP(ifp->lst_next==NULL);
+#ifdef NET_REFCNT_DEBUG
+	printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
+#endif
+
+	in6_dev_put(ifp->idev);
+
+	if (del_timer(&ifp->timer))
+		printk("Timer is still running, when freeing ifa=%p\n", ifp);
+
+	if (!ifp->dead) {
+		printk("Freeing alive inet6 address %p\n", ifp);
+		return;
+	}
+	dst_release(&ifp->rt->u.dst);
+
+	kfree(ifp);
+}
+
+/* On success it returns ifp with increased reference count */
+
+static struct inet6_ifaddr *
+ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
+	      int scope, unsigned flags)
+{
+	struct inet6_ifaddr *ifa = NULL;
+	struct rt6_info *rt;
+	int hash;
+	int err = 0;
+
+	read_lock_bh(&addrconf_lock);
+	if (idev->dead) {
+		err = -ENODEV;			/*XXX*/
+		goto out2;
+	}
+
+	write_lock(&addrconf_hash_lock);
+
+	/* Ignore adding duplicate addresses on an interface */
+	if (ipv6_chk_same_addr(addr, idev->dev)) {
+		ADBG(("ipv6_add_addr: already assigned\n"));
+		err = -EEXIST;
+		goto out;
+	}
+
+	ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
+
+	if (ifa == NULL) {
+		ADBG(("ipv6_add_addr: malloc failed\n"));
+		err = -ENOBUFS;
+		goto out;
+	}
+
+	rt = addrconf_dst_alloc(idev, addr, 0);
+	if (IS_ERR(rt)) {
+		err = PTR_ERR(rt);
+		goto out;
+	}
+
+	memset(ifa, 0, sizeof(struct inet6_ifaddr));
+	ipv6_addr_copy(&ifa->addr, addr);
+
+	spin_lock_init(&ifa->lock);
+	init_timer(&ifa->timer);
+	ifa->timer.data = (unsigned long) ifa;
+	ifa->scope = scope;
+	ifa->prefix_len = pfxlen;
+	ifa->flags = flags | IFA_F_TENTATIVE;
+	ifa->cstamp = ifa->tstamp = jiffies;
+
+	ifa->idev = idev;
+	in6_dev_hold(idev);
+	/* For caller */
+	in6_ifa_hold(ifa);
+
+	/* Add to big hash table */
+	hash = ipv6_addr_hash(addr);
+
+	ifa->lst_next = inet6_addr_lst[hash];
+	inet6_addr_lst[hash] = ifa;
+	in6_ifa_hold(ifa);
+	write_unlock(&addrconf_hash_lock);
+
+	write_lock(&idev->lock);
+	/* Add to inet6_dev unicast addr list. */
+	ifa->if_next = idev->addr_list;
+	idev->addr_list = ifa;
+
+#ifdef CONFIG_IPV6_PRIVACY
+	if (ifa->flags&IFA_F_TEMPORARY) {
+		ifa->tmp_next = idev->tempaddr_list;
+		idev->tempaddr_list = ifa;
+		in6_ifa_hold(ifa);
+	}
+#endif
+
+	ifa->rt = rt;
+
+	in6_ifa_hold(ifa);
+	write_unlock(&idev->lock);
+out2:
+	read_unlock_bh(&addrconf_lock);
+
+	if (unlikely(err == 0))
+		notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
+	else {
+		kfree(ifa);
+		ifa = ERR_PTR(err);
+	}
+
+	return ifa;
+out:
+	write_unlock(&addrconf_hash_lock);
+	goto out2;
+}
+
+/* This function wants to get referenced ifp and releases it before return */
+
+static void ipv6_del_addr(struct inet6_ifaddr *ifp)
+{
+	struct inet6_ifaddr *ifa, **ifap;
+	struct inet6_dev *idev = ifp->idev;
+	int hash;
+	int deleted = 0, onlink = 0;
+	unsigned long expires = jiffies;
+
+	hash = ipv6_addr_hash(&ifp->addr);
+
+	ifp->dead = 1;
+
+	write_lock_bh(&addrconf_hash_lock);
+	for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
+	     ifap = &ifa->lst_next) {
+		if (ifa == ifp) {
+			*ifap = ifa->lst_next;
+			__in6_ifa_put(ifp);
+			ifa->lst_next = NULL;
+			break;
+		}
+	}
+	write_unlock_bh(&addrconf_hash_lock);
+
+	write_lock_bh(&idev->lock);
+#ifdef CONFIG_IPV6_PRIVACY
+	if (ifp->flags&IFA_F_TEMPORARY) {
+		for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
+		     ifap = &ifa->tmp_next) {
+			if (ifa == ifp) {
+				*ifap = ifa->tmp_next;
+				if (ifp->ifpub) {
+					in6_ifa_put(ifp->ifpub);
+					ifp->ifpub = NULL;
+				}
+				__in6_ifa_put(ifp);
+				ifa->tmp_next = NULL;
+				break;
+			}
+		}
+	}
+#endif
+
+	for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;
+	     ifap = &ifa->if_next) {
+		if (ifa == ifp) {
+			*ifap = ifa->if_next;
+			__in6_ifa_put(ifp);
+			ifa->if_next = NULL;
+			if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
+				break;
+			deleted = 1;
+		} else if (ifp->flags & IFA_F_PERMANENT) {
+			if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
+					      ifp->prefix_len)) {
+				if (ifa->flags & IFA_F_PERMANENT) {
+					onlink = 1;
+					if (deleted)
+						break;
+				} else {
+					unsigned long lifetime;
+
+					if (!onlink)
+						onlink = -1;
+
+					spin_lock(&ifa->lock);
+					lifetime = min_t(unsigned long,
+							 ifa->valid_lft, 0x7fffffffUL/HZ);
+					if (time_before(expires,
+							ifa->tstamp + lifetime * HZ))
+						expires = ifa->tstamp + lifetime * HZ;
+					spin_unlock(&ifa->lock);
+				}
+			}
+		}
+	}
+	write_unlock_bh(&idev->lock);
+
+	ipv6_ifa_notify(RTM_DELADDR, ifp);
+
+	notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);
+
+	addrconf_del_timer(ifp);
+
+	/*
+	 * Purge or update corresponding prefix
+	 *
+	 * 1) we don't purge prefix here if address was not permanent.
+	 *    prefix is managed by its own lifetime.
+	 * 2) if there're no addresses, delete prefix.
+	 * 3) if there're still other permanent address(es),
+	 *    corresponding prefix is still permanent.
+	 * 4) otherwise, update prefix lifetime to the
+	 *    longest valid lifetime among the corresponding
+	 *    addresses on the device.
+	 *    Note: subsequent RA will update lifetime.
+	 *
+	 * --yoshfuji
+	 */
+	if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
+		struct in6_addr prefix;
+		struct rt6_info *rt;
+
+		ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
+		rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
+
+		if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
+			if (onlink == 0) {
+				ip6_del_rt(rt, NULL, NULL);
+				rt = NULL;
+			} else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
+				rt->rt6i_expires = expires;
+				rt->rt6i_flags |= RTF_EXPIRES;
+			}
+		}
+		dst_release(&rt->u.dst);
+	}
+
+	in6_ifa_put(ifp);
+}
+
+#ifdef CONFIG_IPV6_PRIVACY
+static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
+{
+	struct inet6_dev *idev = ifp->idev;
+	struct in6_addr addr, *tmpaddr;
+	unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
+	int tmp_plen;
+	int ret = 0;
+	int max_addresses;
+
+	write_lock(&idev->lock);
+	if (ift) {
+		spin_lock_bh(&ift->lock);
+		memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
+		spin_unlock_bh(&ift->lock);
+		tmpaddr = &addr;
+	} else {
+		tmpaddr = NULL;
+	}
+retry:
+	in6_dev_hold(idev);
+	if (idev->cnf.use_tempaddr <= 0) {
+		write_unlock(&idev->lock);
+		printk(KERN_INFO
+			"ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
+		in6_dev_put(idev);
+		ret = -1;
+		goto out;
+	}
+	spin_lock_bh(&ifp->lock);
+	if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
+		idev->cnf.use_tempaddr = -1;	/*XXX*/
+		spin_unlock_bh(&ifp->lock);
+		write_unlock(&idev->lock);
+		printk(KERN_WARNING
+			"ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
+		in6_dev_put(idev);
+		ret = -1;
+		goto out;
+	}
+	in6_ifa_hold(ifp);
+	memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
+	if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
+		spin_unlock_bh(&ifp->lock);
+		write_unlock(&idev->lock);
+		printk(KERN_WARNING
+			"ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
+		in6_ifa_put(ifp);
+		in6_dev_put(idev);
+		ret = -1;
+		goto out;
+	}
+	memcpy(&addr.s6_addr[8], idev->rndid, 8);
+	tmp_valid_lft = min_t(__u32,
+			      ifp->valid_lft,
+			      idev->cnf.temp_valid_lft);
+	tmp_prefered_lft = min_t(__u32, 
+				 ifp->prefered_lft, 
+				 idev->cnf.temp_prefered_lft - desync_factor / HZ);
+	tmp_plen = ifp->prefix_len;
+	max_addresses = idev->cnf.max_addresses;
+	tmp_cstamp = ifp->cstamp;
+	tmp_tstamp = ifp->tstamp;
+	spin_unlock_bh(&ifp->lock);
+
+	write_unlock(&idev->lock);
+	ift = !max_addresses ||
+	      ipv6_count_addresses(idev) < max_addresses ? 
+		ipv6_add_addr(idev, &addr, tmp_plen,
+			      ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
+	if (!ift || IS_ERR(ift)) {
+		in6_ifa_put(ifp);
+		in6_dev_put(idev);
+		printk(KERN_INFO
+			"ipv6_create_tempaddr(): retry temporary address regeneration.\n");
+		tmpaddr = &addr;
+		write_lock(&idev->lock);
+		goto retry;
+	}
+
+	spin_lock_bh(&ift->lock);
+	ift->ifpub = ifp;
+	ift->valid_lft = tmp_valid_lft;
+	ift->prefered_lft = tmp_prefered_lft;
+	ift->cstamp = tmp_cstamp;
+	ift->tstamp = tmp_tstamp;
+	spin_unlock_bh(&ift->lock);
+
+	addrconf_dad_start(ift, 0);
+	in6_ifa_put(ift);
+	in6_dev_put(idev);
+out:
+	return ret;
+}
+#endif
+
+/*
+ *	Choose an appropriate source address
+ *	should do:
+ *	i)	get an address with an appropriate scope
+ *	ii)	see if there is a specific route for the destination and use
+ *		an address of the attached interface 
+ *	iii)	don't use deprecated addresses
+ */
+static int inline ipv6_saddr_pref(const struct inet6_ifaddr *ifp, u8 invpref)
+{
+	int pref;
+	pref = ifp->flags&IFA_F_DEPRECATED ? 0 : 2;
+#ifdef CONFIG_IPV6_PRIVACY
+	pref |= (ifp->flags^invpref)&IFA_F_TEMPORARY ? 0 : 1;
+#endif
+	return pref;
+}
+
+#ifdef CONFIG_IPV6_PRIVACY
+#define IPV6_GET_SADDR_MAXSCORE(score)	((score) == 3)
+#else
+#define IPV6_GET_SADDR_MAXSCORE(score)	(score)
+#endif
+
+int ipv6_dev_get_saddr(struct net_device *dev,
+		       struct in6_addr *daddr, struct in6_addr *saddr)
+{
+	struct inet6_ifaddr *ifp = NULL;
+	struct inet6_ifaddr *match = NULL;
+	struct inet6_dev *idev;
+	int scope;
+	int err;
+	int hiscore = -1, score;
+
+	scope = ipv6_addr_scope(daddr);
+
+	/*
+	 *	known dev
+	 *	search dev and walk through dev addresses
+	 */
+
+	if (dev) {
+		if (dev->flags & IFF_LOOPBACK)
+			scope = IFA_HOST;
+
+		read_lock(&addrconf_lock);
+		idev = __in6_dev_get(dev);
+		if (idev) {
+			read_lock_bh(&idev->lock);
+			for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+				if (ifp->scope == scope) {
+					if (ifp->flags&IFA_F_TENTATIVE)
+						continue;
+#ifdef CONFIG_IPV6_PRIVACY
+					score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0);
+#else
+					score = ipv6_saddr_pref(ifp, 0);
+#endif
+					if (score <= hiscore)
+						continue;
+
+					if (match)
+						in6_ifa_put(match);
+					match = ifp;
+					hiscore = score;
+					in6_ifa_hold(ifp);
+
+					if (IPV6_GET_SADDR_MAXSCORE(score)) {
+						read_unlock_bh(&idev->lock);
+						read_unlock(&addrconf_lock);
+						goto out;
+					}
+				}
+			}
+			read_unlock_bh(&idev->lock);
+		}
+		read_unlock(&addrconf_lock);
+	}
+
+	if (scope == IFA_LINK)
+		goto out;
+
+	/*
+	 *	dev == NULL or search failed for specified dev
+	 */
+
+	read_lock(&dev_base_lock);
+	read_lock(&addrconf_lock);
+	for (dev = dev_base; dev; dev=dev->next) {
+		idev = __in6_dev_get(dev);
+		if (idev) {
+			read_lock_bh(&idev->lock);
+			for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+				if (ifp->scope == scope) {
+					if (ifp->flags&IFA_F_TENTATIVE)
+						continue;
+#ifdef CONFIG_IPV6_PRIVACY
+					score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0);
+#else
+					score = ipv6_saddr_pref(ifp, 0);
+#endif
+					if (score <= hiscore)
+						continue;
+
+					if (match)
+						in6_ifa_put(match);
+					match = ifp;
+					hiscore = score;
+					in6_ifa_hold(ifp);
+
+					if (IPV6_GET_SADDR_MAXSCORE(score)) {
+						read_unlock_bh(&idev->lock);
+						goto out_unlock_base;
+					}
+				}
+			}
+			read_unlock_bh(&idev->lock);
+		}
+	}
+
+out_unlock_base:
+	read_unlock(&addrconf_lock);
+	read_unlock(&dev_base_lock);
+
+out:
+	err = -EADDRNOTAVAIL;
+	if (match) {
+		ipv6_addr_copy(saddr, &match->addr);
+		err = 0;
+		in6_ifa_put(match);
+	}
+
+	return err;
+}
+
+
+int ipv6_get_saddr(struct dst_entry *dst,
+		   struct in6_addr *daddr, struct in6_addr *saddr)
+{
+	return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr);
+}
+
+
+int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
+{
+	struct inet6_dev *idev;
+	int err = -EADDRNOTAVAIL;
+
+	read_lock(&addrconf_lock);
+	if ((idev = __in6_dev_get(dev)) != NULL) {
+		struct inet6_ifaddr *ifp;
+
+		read_lock_bh(&idev->lock);
+		for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+			if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
+				ipv6_addr_copy(addr, &ifp->addr);
+				err = 0;
+				break;
+			}
+		}
+		read_unlock_bh(&idev->lock);
+	}
+	read_unlock(&addrconf_lock);
+	return err;
+}
+
+static int ipv6_count_addresses(struct inet6_dev *idev)
+{
+	int cnt = 0;
+	struct inet6_ifaddr *ifp;
+
+	read_lock_bh(&idev->lock);
+	for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
+		cnt++;
+	read_unlock_bh(&idev->lock);
+	return cnt;
+}
+
+int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
+{
+	struct inet6_ifaddr * ifp;
+	u8 hash = ipv6_addr_hash(addr);
+
+	read_lock_bh(&addrconf_hash_lock);
+	for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+		if (ipv6_addr_equal(&ifp->addr, addr) &&
+		    !(ifp->flags&IFA_F_TENTATIVE)) {
+			if (dev == NULL || ifp->idev->dev == dev ||
+			    !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
+				break;
+		}
+	}
+	read_unlock_bh(&addrconf_hash_lock);
+	return ifp != NULL;
+}
+
+static
+int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
+{
+	struct inet6_ifaddr * ifp;
+	u8 hash = ipv6_addr_hash(addr);
+
+	for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+		if (ipv6_addr_equal(&ifp->addr, addr)) {
+			if (dev == NULL || ifp->idev->dev == dev)
+				break;
+		}
+	}
+	return ifp != NULL;
+}
+
+struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
+{
+	struct inet6_ifaddr * ifp;
+	u8 hash = ipv6_addr_hash(addr);
+
+	read_lock_bh(&addrconf_hash_lock);
+	for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+		if (ipv6_addr_equal(&ifp->addr, addr)) {
+			if (dev == NULL || ifp->idev->dev == dev ||
+			    !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
+				in6_ifa_hold(ifp);
+				break;
+			}
+		}
+	}
+	read_unlock_bh(&addrconf_hash_lock);
+
+	return ifp;
+}
+
+int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
+{
+	const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
+	const struct in6_addr *sk2_rcv_saddr6 = tcp_v6_rcv_saddr(sk2);
+	u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
+	u32 sk2_rcv_saddr = tcp_v4_rcv_saddr(sk2);
+	int sk_ipv6only = ipv6_only_sock(sk);
+	int sk2_ipv6only = tcp_v6_ipv6only(sk2);
+	int addr_type = ipv6_addr_type(sk_rcv_saddr6);
+	int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
+
+	if (!sk2_rcv_saddr && !sk_ipv6only)
+		return 1;
+
+	if (addr_type2 == IPV6_ADDR_ANY &&
+	    !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
+		return 1;
+
+	if (addr_type == IPV6_ADDR_ANY &&
+	    !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
+		return 1;
+
+	if (sk2_rcv_saddr6 &&
+	    ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
+		return 1;
+
+	if (addr_type == IPV6_ADDR_MAPPED &&
+	    !sk2_ipv6only &&
+	    (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
+		return 1;
+
+	return 0;
+}
+
+/* Gets referenced address, destroys ifaddr */
+
+void addrconf_dad_failure(struct inet6_ifaddr *ifp)
+{
+	if (net_ratelimit())
+		printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
+	if (ifp->flags&IFA_F_PERMANENT) {
+		spin_lock_bh(&ifp->lock);
+		addrconf_del_timer(ifp);
+		ifp->flags |= IFA_F_TENTATIVE;
+		spin_unlock_bh(&ifp->lock);
+		in6_ifa_put(ifp);
+#ifdef CONFIG_IPV6_PRIVACY
+	} else if (ifp->flags&IFA_F_TEMPORARY) {
+		struct inet6_ifaddr *ifpub;
+		spin_lock_bh(&ifp->lock);
+		ifpub = ifp->ifpub;
+		if (ifpub) {
+			in6_ifa_hold(ifpub);
+			spin_unlock_bh(&ifp->lock);
+			ipv6_create_tempaddr(ifpub, ifp);
+			in6_ifa_put(ifpub);
+		} else {
+			spin_unlock_bh(&ifp->lock);
+		}
+		ipv6_del_addr(ifp);
+#endif
+	} else
+		ipv6_del_addr(ifp);
+}
+
+
+/* Join to solicited addr multicast group. */
+
+void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
+{
+	struct in6_addr maddr;
+
+	if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
+		return;
+
+	addrconf_addr_solict_mult(addr, &maddr);
+	ipv6_dev_mc_inc(dev, &maddr);
+}
+
+void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
+{
+	struct in6_addr maddr;
+
+	if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
+		return;
+
+	addrconf_addr_solict_mult(addr, &maddr);
+	__ipv6_dev_mc_dec(idev, &maddr);
+}
+
+void addrconf_join_anycast(struct inet6_ifaddr *ifp)
+{
+	struct in6_addr addr;
+	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
+	if (ipv6_addr_any(&addr))
+		return;
+	ipv6_dev_ac_inc(ifp->idev->dev, &addr);
+}
+
+void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
+{
+	struct in6_addr addr;
+	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
+	if (ipv6_addr_any(&addr))
+		return;
+	__ipv6_dev_ac_dec(ifp->idev, &addr);
+}
+
+static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
+{
+	switch (dev->type) {
+	case ARPHRD_ETHER:
+	case ARPHRD_FDDI:
+	case ARPHRD_IEEE802_TR:
+		if (dev->addr_len != ETH_ALEN)
+			return -1;
+		memcpy(eui, dev->dev_addr, 3);
+		memcpy(eui + 5, dev->dev_addr + 3, 3);
+
+		/*
+		 * The zSeries OSA network cards can be shared among various
+		 * OS instances, but the OSA cards have only one MAC address.
+		 * This leads to duplicate address conflicts in conjunction
+		 * with IPv6 if more than one instance uses the same card.
+		 * 
+		 * The driver for these cards can deliver a unique 16-bit
+		 * identifier for each instance sharing the same card.  It is
+		 * placed instead of 0xFFFE in the interface identifier.  The
+		 * "u" bit of the interface identifier is not inverted in this
+		 * case.  Hence the resulting interface identifier has local
+		 * scope according to RFC2373.
+		 */
+		if (dev->dev_id) {
+			eui[3] = (dev->dev_id >> 8) & 0xFF;
+			eui[4] = dev->dev_id & 0xFF;
+		} else {
+			eui[3] = 0xFF;
+			eui[4] = 0xFE;
+			eui[0] ^= 2;
+		}
+		return 0;
+	case ARPHRD_ARCNET:
+		/* XXX: inherit EUI-64 from other interface -- yoshfuji */
+		if (dev->addr_len != ARCNET_ALEN)
+			return -1;
+		memset(eui, 0, 7);
+		eui[7] = *(u8*)dev->dev_addr;
+		return 0;
+	case ARPHRD_INFINIBAND:
+		if (dev->addr_len != INFINIBAND_ALEN)
+			return -1;
+		memcpy(eui, dev->dev_addr + 12, 8);
+		eui[0] |= 2;
+		return 0;
+	}
+	return -1;
+}
+
+static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
+{
+	int err = -1;
+	struct inet6_ifaddr *ifp;
+
+	read_lock_bh(&idev->lock);
+	for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+		if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
+			memcpy(eui, ifp->addr.s6_addr+8, 8);
+			err = 0;
+			break;
+		}
+	}
+	read_unlock_bh(&idev->lock);
+	return err;
+}
+
+#ifdef CONFIG_IPV6_PRIVACY
+/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
+static int __ipv6_regen_rndid(struct inet6_dev *idev)
+{
+	struct net_device *dev;
+	struct scatterlist sg[2];
+
+	sg[0].page = virt_to_page(idev->entropy);
+	sg[0].offset = offset_in_page(idev->entropy);
+	sg[0].length = 8;
+	sg[1].page = virt_to_page(idev->work_eui64);
+	sg[1].offset = offset_in_page(idev->work_eui64);
+	sg[1].length = 8;
+
+	dev = idev->dev;
+
+	if (ipv6_generate_eui64(idev->work_eui64, dev)) {
+		printk(KERN_INFO
+			"__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
+			idev);
+		get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64));
+	}
+regen:
+	spin_lock(&md5_tfm_lock);
+	if (unlikely(md5_tfm == NULL)) {
+		spin_unlock(&md5_tfm_lock);
+		return -1;
+	}
+	crypto_digest_init(md5_tfm);
+	crypto_digest_update(md5_tfm, sg, 2);
+	crypto_digest_final(md5_tfm, idev->work_digest);
+	spin_unlock(&md5_tfm_lock);
+
+	memcpy(idev->rndid, &idev->work_digest[0], 8);
+	idev->rndid[0] &= ~0x02;
+	memcpy(idev->entropy, &idev->work_digest[8], 8);
+
+	/*
+	 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
+	 * check if generated address is not inappropriate
+	 *
+	 *  - Reserved subnet anycast (RFC 2526)
+	 *	11111101 11....11 1xxxxxxx
+	 *  - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
+	 *	00-00-5E-FE-xx-xx-xx-xx
+	 *  - value 0
+	 *  - XXX: already assigned to an address on the device
+	 */
+	if (idev->rndid[0] == 0xfd && 
+	    (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
+	    (idev->rndid[7]&0x80))
+		goto regen;
+	if ((idev->rndid[0]|idev->rndid[1]) == 0) {
+		if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
+			goto regen;
+		if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
+			goto regen;
+	}
+
+	return 0;
+}
+
+static void ipv6_regen_rndid(unsigned long data)
+{
+	struct inet6_dev *idev = (struct inet6_dev *) data;
+	unsigned long expires;
+
+	read_lock_bh(&addrconf_lock);
+	write_lock_bh(&idev->lock);
+
+	if (idev->dead)
+		goto out;
+
+	if (__ipv6_regen_rndid(idev) < 0)
+		goto out;
+	
+	expires = jiffies +
+		idev->cnf.temp_prefered_lft * HZ - 
+		idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
+	if (time_before(expires, jiffies)) {
+		printk(KERN_WARNING
+			"ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
+			idev->dev->name);
+		goto out;
+	}
+
+	if (!mod_timer(&idev->regen_timer, expires))
+		in6_dev_hold(idev);
+
+out:
+	write_unlock_bh(&idev->lock);
+	read_unlock_bh(&addrconf_lock);
+	in6_dev_put(idev);
+}
+
+static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
+	int ret = 0;
+
+	if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
+		ret = __ipv6_regen_rndid(idev);
+	return ret;
+}
+#endif
+
+/*
+ *	Add prefix route.
+ */
+
+static void
+addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
+		      unsigned long expires, unsigned flags)
+{
+	struct in6_rtmsg rtmsg;
+
+	memset(&rtmsg, 0, sizeof(rtmsg));
+	ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx);
+	rtmsg.rtmsg_dst_len = plen;
+	rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
+	rtmsg.rtmsg_ifindex = dev->ifindex;
+	rtmsg.rtmsg_info = expires;
+	rtmsg.rtmsg_flags = RTF_UP|flags;
+	rtmsg.rtmsg_type = RTMSG_NEWROUTE;
+
+	/* Prevent useless cloning on PtP SIT.
+	   This thing is done here expecting that the whole
+	   class of non-broadcast devices need not cloning.
+	 */
+	if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
+		rtmsg.rtmsg_flags |= RTF_NONEXTHOP;
+
+	ip6_route_add(&rtmsg, NULL, NULL);
+}
+
+/* Create "default" multicast route to the interface */
+
+static void addrconf_add_mroute(struct net_device *dev)
+{
+	struct in6_rtmsg rtmsg;
+
+	memset(&rtmsg, 0, sizeof(rtmsg));
+	ipv6_addr_set(&rtmsg.rtmsg_dst,
+		      htonl(0xFF000000), 0, 0, 0);
+	rtmsg.rtmsg_dst_len = 8;
+	rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
+	rtmsg.rtmsg_ifindex = dev->ifindex;
+	rtmsg.rtmsg_flags = RTF_UP;
+	rtmsg.rtmsg_type = RTMSG_NEWROUTE;
+	ip6_route_add(&rtmsg, NULL, NULL);
+}
+
+static void sit_route_add(struct net_device *dev)
+{
+	struct in6_rtmsg rtmsg;
+
+	memset(&rtmsg, 0, sizeof(rtmsg));
+
+	rtmsg.rtmsg_type	= RTMSG_NEWROUTE;
+	rtmsg.rtmsg_metric	= IP6_RT_PRIO_ADDRCONF;
+
+	/* prefix length - 96 bits "::d.d.d.d" */
+	rtmsg.rtmsg_dst_len	= 96;
+	rtmsg.rtmsg_flags	= RTF_UP|RTF_NONEXTHOP;
+	rtmsg.rtmsg_ifindex	= dev->ifindex;
+
+	ip6_route_add(&rtmsg, NULL, NULL);
+}
+
+static void addrconf_add_lroute(struct net_device *dev)
+{
+	struct in6_addr addr;
+
+	ipv6_addr_set(&addr,  htonl(0xFE800000), 0, 0, 0);
+	addrconf_prefix_route(&addr, 64, dev, 0, 0);
+}
+
+static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
+{
+	struct inet6_dev *idev;
+
+	ASSERT_RTNL();
+
+	if ((idev = ipv6_find_idev(dev)) == NULL)
+		return NULL;
+
+	/* Add default multicast route */
+	addrconf_add_mroute(dev);
+
+	/* Add link local route */
+	addrconf_add_lroute(dev);
+	return idev;
+}
+
+void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
+{
+	struct prefix_info *pinfo;
+	__u32 valid_lft;
+	__u32 prefered_lft;
+	int addr_type;
+	unsigned long rt_expires;
+	struct inet6_dev *in6_dev;
+
+	pinfo = (struct prefix_info *) opt;
+	
+	if (len < sizeof(struct prefix_info)) {
+		ADBG(("addrconf: prefix option too short\n"));
+		return;
+	}
+	
+	/*
+	 *	Validation checks ([ADDRCONF], page 19)
+	 */
+
+	addr_type = ipv6_addr_type(&pinfo->prefix);
+
+	if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
+		return;
+
+	valid_lft = ntohl(pinfo->valid);
+	prefered_lft = ntohl(pinfo->prefered);
+
+	if (prefered_lft > valid_lft) {
+		if (net_ratelimit())
+			printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
+		return;
+	}
+
+	in6_dev = in6_dev_get(dev);
+
+	if (in6_dev == NULL) {
+		if (net_ratelimit())
+			printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
+		return;
+	}
+
+	/*
+	 *	Two things going on here:
+	 *	1) Add routes for on-link prefixes
+	 *	2) Configure prefixes with the auto flag set
+	 */
+
+	/* Avoid arithmetic overflow. Really, we could
+	   save rt_expires in seconds, likely valid_lft,
+	   but it would require division in fib gc, that it
+	   not good.
+	 */
+	if (valid_lft >= 0x7FFFFFFF/HZ)
+		rt_expires = 0;
+	else
+		rt_expires = jiffies + valid_lft * HZ;
+
+	if (pinfo->onlink) {
+		struct rt6_info *rt;
+		rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
+
+		if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
+			if (rt->rt6i_flags&RTF_EXPIRES) {
+				if (valid_lft == 0) {
+					ip6_del_rt(rt, NULL, NULL);
+					rt = NULL;
+				} else {
+					rt->rt6i_expires = rt_expires;
+				}
+			}
+		} else if (valid_lft) {
+			addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
+					      dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
+		}
+		if (rt)
+			dst_release(&rt->u.dst);
+	}
+
+	/* Try to figure out our local address for this prefix */
+
+	if (pinfo->autoconf && in6_dev->cnf.autoconf) {
+		struct inet6_ifaddr * ifp;
+		struct in6_addr addr;
+		int create = 0, update_lft = 0;
+
+		if (pinfo->prefix_len == 64) {
+			memcpy(&addr, &pinfo->prefix, 8);
+			if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
+			    ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
+				in6_dev_put(in6_dev);
+				return;
+			}
+			goto ok;
+		}
+		if (net_ratelimit())
+			printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
+			       pinfo->prefix_len);
+		in6_dev_put(in6_dev);
+		return;
+
+ok:
+
+		ifp = ipv6_get_ifaddr(&addr, dev, 1);
+
+		if (ifp == NULL && valid_lft) {
+			int max_addresses = in6_dev->cnf.max_addresses;
+
+			/* Do not allow to create too much of autoconfigured
+			 * addresses; this would be too easy way to crash kernel.
+			 */
+			if (!max_addresses ||
+			    ipv6_count_addresses(in6_dev) < max_addresses)
+				ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
+						    addr_type&IPV6_ADDR_SCOPE_MASK, 0);
+
+			if (!ifp || IS_ERR(ifp)) {
+				in6_dev_put(in6_dev);
+				return;
+			}
+
+			update_lft = create = 1;
+			ifp->cstamp = jiffies;
+			addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
+		}
+
+		if (ifp) {
+			int flags;
+			unsigned long now;
+#ifdef CONFIG_IPV6_PRIVACY
+			struct inet6_ifaddr *ift;
+#endif
+			u32 stored_lft;
+
+			/* update lifetime (RFC2462 5.5.3 e) */
+			spin_lock(&ifp->lock);
+			now = jiffies;
+			if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
+				stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
+			else
+				stored_lft = 0;
+			if (!update_lft && stored_lft) {
+				if (valid_lft > MIN_VALID_LIFETIME ||
+				    valid_lft > stored_lft)
+					update_lft = 1;
+				else if (stored_lft <= MIN_VALID_LIFETIME) {
+					/* valid_lft <= stored_lft is always true */
+					/* XXX: IPsec */
+					update_lft = 0;
+				} else {
+					valid_lft = MIN_VALID_LIFETIME;
+					if (valid_lft < prefered_lft)
+						prefered_lft = valid_lft;
+					update_lft = 1;
+				}
+			}
+
+			if (update_lft) {
+				ifp->valid_lft = valid_lft;
+				ifp->prefered_lft = prefered_lft;
+				ifp->tstamp = now;
+				flags = ifp->flags;
+				ifp->flags &= ~IFA_F_DEPRECATED;
+				spin_unlock(&ifp->lock);
+
+				if (!(flags&IFA_F_TENTATIVE))
+					ipv6_ifa_notify(0, ifp);
+			} else
+				spin_unlock(&ifp->lock);
+
+#ifdef CONFIG_IPV6_PRIVACY
+			read_lock_bh(&in6_dev->lock);
+			/* update all temporary addresses in the list */
+			for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
+				/*
+				 * When adjusting the lifetimes of an existing
+				 * temporary address, only lower the lifetimes.
+				 * Implementations must not increase the
+				 * lifetimes of an existing temporary address
+				 * when processing a Prefix Information Option.
+				 */
+				spin_lock(&ift->lock);
+				flags = ift->flags;
+				if (ift->valid_lft > valid_lft &&
+				    ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
+					ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
+				if (ift->prefered_lft > prefered_lft &&
+				    ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
+					ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
+				spin_unlock(&ift->lock);
+				if (!(flags&IFA_F_TENTATIVE))
+					ipv6_ifa_notify(0, ift);
+			}
+
+			if (create && in6_dev->cnf.use_tempaddr > 0) {
+				/*
+				 * When a new public address is created as described in [ADDRCONF],
+				 * also create a new temporary address.
+				 */
+				read_unlock_bh(&in6_dev->lock); 
+				ipv6_create_tempaddr(ifp, NULL);
+			} else {
+				read_unlock_bh(&in6_dev->lock);
+			}
+#endif
+			in6_ifa_put(ifp);
+			addrconf_verify(0);
+		}
+	}
+	inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
+	in6_dev_put(in6_dev);
+}
+
+/*
+ *	Set destination address.
+ *	Special case for SIT interfaces where we create a new "virtual"
+ *	device.
+ */
+int addrconf_set_dstaddr(void __user *arg)
+{
+	struct in6_ifreq ireq;
+	struct net_device *dev;
+	int err = -EINVAL;
+
+	rtnl_lock();
+
+	err = -EFAULT;
+	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
+		goto err_exit;
+
+	dev = __dev_get_by_index(ireq.ifr6_ifindex);
+
+	err = -ENODEV;
+	if (dev == NULL)
+		goto err_exit;
+
+	if (dev->type == ARPHRD_SIT) {
+		struct ifreq ifr;
+		mm_segment_t	oldfs;
+		struct ip_tunnel_parm p;
+
+		err = -EADDRNOTAVAIL;
+		if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
+			goto err_exit;
+
+		memset(&p, 0, sizeof(p));
+		p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
+		p.iph.saddr = 0;
+		p.iph.version = 4;
+		p.iph.ihl = 5;
+		p.iph.protocol = IPPROTO_IPV6;
+		p.iph.ttl = 64;
+		ifr.ifr_ifru.ifru_data = (void __user *)&p;
+
+		oldfs = get_fs(); set_fs(KERNEL_DS);
+		err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
+		set_fs(oldfs);
+
+		if (err == 0) {
+			err = -ENOBUFS;
+			if ((dev = __dev_get_by_name(p.name)) == NULL)
+				goto err_exit;
+			err = dev_open(dev);
+		}
+	}
+
+err_exit:
+	rtnl_unlock();
+	return err;
+}
+
+/*
+ *	Manual configuration of address on an interface
+ */
+static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
+{
+	struct inet6_ifaddr *ifp;
+	struct inet6_dev *idev;
+	struct net_device *dev;
+	int scope;
+
+	ASSERT_RTNL();
+	
+	if ((dev = __dev_get_by_index(ifindex)) == NULL)
+		return -ENODEV;
+	
+	if (!(dev->flags&IFF_UP))
+		return -ENETDOWN;
+
+	if ((idev = addrconf_add_dev(dev)) == NULL)
+		return -ENOBUFS;
+
+	scope = ipv6_addr_scope(pfx);
+
+	ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
+	if (!IS_ERR(ifp)) {
+		addrconf_dad_start(ifp, 0);
+		in6_ifa_put(ifp);
+		return 0;
+	}
+
+	return PTR_ERR(ifp);
+}
+
+static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
+{
+	struct inet6_ifaddr *ifp;
+	struct inet6_dev *idev;
+	struct net_device *dev;
+	
+	if ((dev = __dev_get_by_index(ifindex)) == NULL)
+		return -ENODEV;
+
+	if ((idev = __in6_dev_get(dev)) == NULL)
+		return -ENXIO;
+
+	read_lock_bh(&idev->lock);
+	for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
+		if (ifp->prefix_len == plen &&
+		    ipv6_addr_equal(pfx, &ifp->addr)) {
+			in6_ifa_hold(ifp);
+			read_unlock_bh(&idev->lock);
+			
+			ipv6_del_addr(ifp);
+
+			/* If the last address is deleted administratively,
+			   disable IPv6 on this interface.
+			 */
+			if (idev->addr_list == NULL)
+				addrconf_ifdown(idev->dev, 1);
+			return 0;
+		}
+	}
+	read_unlock_bh(&idev->lock);
+	return -EADDRNOTAVAIL;
+}
+
+
+int addrconf_add_ifaddr(void __user *arg)
+{
+	struct in6_ifreq ireq;
+	int err;
+	
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+	
+	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
+		return -EFAULT;
+
+	rtnl_lock();
+	err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
+	rtnl_unlock();
+	return err;
+}
+
+int addrconf_del_ifaddr(void __user *arg)
+{
+	struct in6_ifreq ireq;
+	int err;
+	
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
+		return -EFAULT;
+
+	rtnl_lock();
+	err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
+	rtnl_unlock();
+	return err;
+}
+
+static void sit_add_v4_addrs(struct inet6_dev *idev)
+{
+	struct inet6_ifaddr * ifp;
+	struct in6_addr addr;
+	struct net_device *dev;
+	int scope;
+
+	ASSERT_RTNL();
+
+	memset(&addr, 0, sizeof(struct in6_addr));
+	memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
+
+	if (idev->dev->flags&IFF_POINTOPOINT) {
+		addr.s6_addr32[0] = htonl(0xfe800000);
+		scope = IFA_LINK;
+	} else {
+		scope = IPV6_ADDR_COMPATv4;
+	}
+
+	if (addr.s6_addr32[3]) {
+		ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
+		if (!IS_ERR(ifp)) {
+			spin_lock_bh(&ifp->lock);
+			ifp->flags &= ~IFA_F_TENTATIVE;
+			spin_unlock_bh(&ifp->lock);
+			ipv6_ifa_notify(RTM_NEWADDR, ifp);
+			in6_ifa_put(ifp);
+		}
+		return;
+	}
+
+        for (dev = dev_base; dev != NULL; dev = dev->next) {
+		struct in_device * in_dev = __in_dev_get(dev);
+		if (in_dev && (dev->flags & IFF_UP)) {
+			struct in_ifaddr * ifa;
+
+			int flag = scope;
+
+			for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
+				int plen;
+
+				addr.s6_addr32[3] = ifa->ifa_local;
+
+				if (ifa->ifa_scope == RT_SCOPE_LINK)
+					continue;
+				if (ifa->ifa_scope >= RT_SCOPE_HOST) {
+					if (idev->dev->flags&IFF_POINTOPOINT)
+						continue;
+					flag |= IFA_HOST;
+				}
+				if (idev->dev->flags&IFF_POINTOPOINT)
+					plen = 64;
+				else
+					plen = 96;
+
+				ifp = ipv6_add_addr(idev, &addr, plen, flag,
+						    IFA_F_PERMANENT);
+				if (!IS_ERR(ifp)) {
+					spin_lock_bh(&ifp->lock);
+					ifp->flags &= ~IFA_F_TENTATIVE;
+					spin_unlock_bh(&ifp->lock);
+					ipv6_ifa_notify(RTM_NEWADDR, ifp);
+					in6_ifa_put(ifp);
+				}
+			}
+		}
+        }
+}
+
+static void init_loopback(struct net_device *dev)
+{
+	struct inet6_dev  *idev;
+	struct inet6_ifaddr * ifp;
+
+	/* ::1 */
+
+	ASSERT_RTNL();
+
+	if ((idev = ipv6_find_idev(dev)) == NULL) {
+		printk(KERN_DEBUG "init loopback: add_dev failed\n");
+		return;
+	}
+
+	ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
+	if (!IS_ERR(ifp)) {
+		spin_lock_bh(&ifp->lock);
+		ifp->flags &= ~IFA_F_TENTATIVE;
+		spin_unlock_bh(&ifp->lock);
+		ipv6_ifa_notify(RTM_NEWADDR, ifp);
+		in6_ifa_put(ifp);
+	}
+}
+
+static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
+{
+	struct inet6_ifaddr * ifp;
+
+	ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
+	if (!IS_ERR(ifp)) {
+		addrconf_dad_start(ifp, 0);
+		in6_ifa_put(ifp);
+	}
+}
+
+static void addrconf_dev_config(struct net_device *dev)
+{
+	struct in6_addr addr;
+	struct inet6_dev    * idev;
+
+	ASSERT_RTNL();
+
+	if ((dev->type != ARPHRD_ETHER) && 
+	    (dev->type != ARPHRD_FDDI) &&
+	    (dev->type != ARPHRD_IEEE802_TR) &&
+	    (dev->type != ARPHRD_ARCNET) &&
+	    (dev->type != ARPHRD_INFINIBAND)) {
+		/* Alas, we support only Ethernet autoconfiguration. */
+		return;
+	}
+
+	idev = addrconf_add_dev(dev);
+	if (idev == NULL)
+		return;
+
+	memset(&addr, 0, sizeof(struct in6_addr));
+	addr.s6_addr32[0] = htonl(0xFE800000);
+
+	if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
+		addrconf_add_linklocal(idev, &addr);
+}
+
+static void addrconf_sit_config(struct net_device *dev)
+{
+	struct inet6_dev *idev;
+
+	ASSERT_RTNL();
+
+	/* 
+	 * Configure the tunnel with one of our IPv4 
+	 * addresses... we should configure all of 
+	 * our v4 addrs in the tunnel
+	 */
+
+	if ((idev = ipv6_find_idev(dev)) == NULL) {
+		printk(KERN_DEBUG "init sit: add_dev failed\n");
+		return;
+	}
+
+	sit_add_v4_addrs(idev);
+
+	if (dev->flags&IFF_POINTOPOINT) {
+		addrconf_add_mroute(dev);
+		addrconf_add_lroute(dev);
+	} else
+		sit_route_add(dev);
+}
+
+static inline int
+ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
+{
+	struct in6_addr lladdr;
+
+	if (!ipv6_get_lladdr(link_dev, &lladdr)) {
+		addrconf_add_linklocal(idev, &lladdr);
+		return 0;
+	}
+	return -1;
+}
+
+static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
+{
+	struct net_device *link_dev;
+
+	/* first try to inherit the link-local address from the link device */
+	if (idev->dev->iflink &&
+	    (link_dev = __dev_get_by_index(idev->dev->iflink))) {
+		if (!ipv6_inherit_linklocal(idev, link_dev))
+			return;
+	}
+	/* then try to inherit it from any device */
+	for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
+		if (!ipv6_inherit_linklocal(idev, link_dev))
+			return;
+	}
+	printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
+}
+
+/*
+ * Autoconfigure tunnel with a link-local address so routing protocols,
+ * DHCPv6, MLD etc. can be run over the virtual link
+ */
+
+static void addrconf_ip6_tnl_config(struct net_device *dev)
+{
+	struct inet6_dev *idev;
+
+	ASSERT_RTNL();
+
+	if ((idev = addrconf_add_dev(dev)) == NULL) {
+		printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
+		return;
+	}
+	ip6_tnl_add_linklocal(idev);
+	addrconf_add_mroute(dev);
+}
+
+static int addrconf_notify(struct notifier_block *this, unsigned long event, 
+			   void * data)
+{
+	struct net_device *dev = (struct net_device *) data;
+	struct inet6_dev *idev = __in6_dev_get(dev);
+
+	switch(event) {
+	case NETDEV_UP:
+		switch(dev->type) {
+		case ARPHRD_SIT:
+			addrconf_sit_config(dev);
+			break;
+		case ARPHRD_TUNNEL6:
+			addrconf_ip6_tnl_config(dev);
+			break;
+		case ARPHRD_LOOPBACK:
+			init_loopback(dev);
+			break;
+
+		default:
+			addrconf_dev_config(dev);
+			break;
+		};
+		if (idev) {
+			/* If the MTU changed during the interface down, when the
+			   interface up, the changed MTU must be reflected in the
+			   idev as well as routers.
+			 */
+			if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
+				rt6_mtu_change(dev, dev->mtu);
+				idev->cnf.mtu6 = dev->mtu;
+			}
+			idev->tstamp = jiffies;
+			inet6_ifinfo_notify(RTM_NEWLINK, idev);
+			/* If the changed mtu during down is lower than IPV6_MIN_MTU
+			   stop IPv6 on this interface.
+			 */
+			if (dev->mtu < IPV6_MIN_MTU)
+				addrconf_ifdown(dev, event != NETDEV_DOWN);
+		}
+		break;
+
+	case NETDEV_CHANGEMTU:
+		if ( idev && dev->mtu >= IPV6_MIN_MTU) {
+			rt6_mtu_change(dev, dev->mtu);
+			idev->cnf.mtu6 = dev->mtu;
+			break;
+		}
+
+		/* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
+
+	case NETDEV_DOWN:
+	case NETDEV_UNREGISTER:
+		/*
+		 *	Remove all addresses from this interface.
+		 */
+		addrconf_ifdown(dev, event != NETDEV_DOWN);
+		break;
+	case NETDEV_CHANGE:
+		break;
+	case NETDEV_CHANGENAME:
+#ifdef CONFIG_SYSCTL
+		if (idev) {
+			addrconf_sysctl_unregister(&idev->cnf);
+			neigh_sysctl_unregister(idev->nd_parms);
+			neigh_sysctl_register(dev, idev->nd_parms,
+					      NET_IPV6, NET_IPV6_NEIGH, "ipv6",
+					      &ndisc_ifinfo_sysctl_change,
+					      NULL);
+			addrconf_sysctl_register(idev, &idev->cnf);
+		}
+#endif
+		break;
+	};
+
+	return NOTIFY_OK;
+}
+
+/*
+ *	addrconf module should be notified of a device going up
+ */
+static struct notifier_block ipv6_dev_notf = {
+	.notifier_call = addrconf_notify,
+	.priority = 0
+};
+
+static int addrconf_ifdown(struct net_device *dev, int how)
+{
+	struct inet6_dev *idev;
+	struct inet6_ifaddr *ifa, **bifa;
+	int i;
+
+	ASSERT_RTNL();
+
+	if (dev == &loopback_dev && how == 1)
+		how = 0;
+
+	rt6_ifdown(dev);
+	neigh_ifdown(&nd_tbl, dev);
+
+	idev = __in6_dev_get(dev);
+	if (idev == NULL)
+		return -ENODEV;
+
+	/* Step 1: remove reference to ipv6 device from parent device.
+	           Do not dev_put!
+	 */
+	if (how == 1) {
+		write_lock_bh(&addrconf_lock);
+		dev->ip6_ptr = NULL;
+		idev->dead = 1;
+		write_unlock_bh(&addrconf_lock);
+
+		/* Step 1.5: remove snmp6 entry */
+		snmp6_unregister_dev(idev);
+
+	}
+
+	/* Step 2: clear hash table */
+	for (i=0; i<IN6_ADDR_HSIZE; i++) {
+		bifa = &inet6_addr_lst[i];
+
+		write_lock_bh(&addrconf_hash_lock);
+		while ((ifa = *bifa) != NULL) {
+			if (ifa->idev == idev) {
+				*bifa = ifa->lst_next;
+				ifa->lst_next = NULL;
+				addrconf_del_timer(ifa);
+				in6_ifa_put(ifa);
+				continue;
+			}
+			bifa = &ifa->lst_next;
+		}
+		write_unlock_bh(&addrconf_hash_lock);
+	}
+
+	write_lock_bh(&idev->lock);
+
+	/* Step 3: clear flags for stateless addrconf */
+	if (how != 1)
+		idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD);
+
+	/* Step 4: clear address list */
+#ifdef CONFIG_IPV6_PRIVACY
+	if (how == 1 && del_timer(&idev->regen_timer))
+		in6_dev_put(idev);
+
+	/* clear tempaddr list */
+	while ((ifa = idev->tempaddr_list) != NULL) {
+		idev->tempaddr_list = ifa->tmp_next;
+		ifa->tmp_next = NULL;
+		ifa->dead = 1;
+		write_unlock_bh(&idev->lock);
+		spin_lock_bh(&ifa->lock);
+
+		if (ifa->ifpub) {
+			in6_ifa_put(ifa->ifpub);
+			ifa->ifpub = NULL;
+		}
+		spin_unlock_bh(&ifa->lock);
+		in6_ifa_put(ifa);
+		write_lock_bh(&idev->lock);
+	}
+#endif
+	while ((ifa = idev->addr_list) != NULL) {
+		idev->addr_list = ifa->if_next;
+		ifa->if_next = NULL;
+		ifa->dead = 1;
+		addrconf_del_timer(ifa);
+		write_unlock_bh(&idev->lock);
+
+		__ipv6_ifa_notify(RTM_DELADDR, ifa);
+		in6_ifa_put(ifa);
+
+		write_lock_bh(&idev->lock);
+	}
+	write_unlock_bh(&idev->lock);
+
+	/* Step 5: Discard multicast list */
+
+	if (how == 1)
+		ipv6_mc_destroy_dev(idev);
+	else
+		ipv6_mc_down(idev);
+
+	/* Step 5: netlink notification of this interface */
+	idev->tstamp = jiffies;
+	inet6_ifinfo_notify(RTM_NEWLINK, idev);
+	
+	/* Shot the device (if unregistered) */
+
+	if (how == 1) {
+#ifdef CONFIG_SYSCTL
+		addrconf_sysctl_unregister(&idev->cnf);
+		neigh_sysctl_unregister(idev->nd_parms);
+#endif
+		neigh_parms_release(&nd_tbl, idev->nd_parms);
+		neigh_ifdown(&nd_tbl, dev);
+		in6_dev_put(idev);
+	}
+	return 0;
+}
+
+static void addrconf_rs_timer(unsigned long data)
+{
+	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
+
+	if (ifp->idev->cnf.forwarding)
+		goto out;
+
+	if (ifp->idev->if_flags & IF_RA_RCVD) {
+		/*
+		 *	Announcement received after solicitation
+		 *	was sent
+		 */
+		goto out;
+	}
+
+	spin_lock(&ifp->lock);
+	if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
+		struct in6_addr all_routers;
+
+		/* The wait after the last probe can be shorter */
+		addrconf_mod_timer(ifp, AC_RS,
+				   (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
+				   ifp->idev->cnf.rtr_solicit_delay :
+				   ifp->idev->cnf.rtr_solicit_interval);
+		spin_unlock(&ifp->lock);
+
+		ipv6_addr_all_routers(&all_routers);
+
+		ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
+	} else {
+		spin_unlock(&ifp->lock);
+		/*
+		 * Note: we do not support deprecated "all on-link"
+		 * assumption any longer.
+		 */
+		printk(KERN_DEBUG "%s: no IPv6 routers present\n",
+		       ifp->idev->dev->name);
+	}
+
+out:
+	in6_ifa_put(ifp);
+}
+
+/*
+ *	Duplicate Address Detection
+ */
+static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags)
+{
+	struct inet6_dev *idev = ifp->idev;
+	struct net_device *dev = idev->dev;
+	unsigned long rand_num;
+
+	addrconf_join_solict(dev, &ifp->addr);
+
+	if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
+		addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
+					flags);
+
+	net_srandom(ifp->addr.s6_addr32[3]);
+	rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
+
+	read_lock_bh(&idev->lock);
+	if (ifp->dead)
+		goto out;
+	spin_lock_bh(&ifp->lock);
+
+	if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
+	    !(ifp->flags&IFA_F_TENTATIVE)) {
+		ifp->flags &= ~IFA_F_TENTATIVE;
+		spin_unlock_bh(&ifp->lock);
+		read_unlock_bh(&idev->lock);
+
+		addrconf_dad_completed(ifp);
+		return;
+	}
+
+	ifp->probes = idev->cnf.dad_transmits;
+	addrconf_mod_timer(ifp, AC_DAD, rand_num);
+
+	spin_unlock_bh(&ifp->lock);
+out:
+	read_unlock_bh(&idev->lock);
+}
+
+static void addrconf_dad_timer(unsigned long data)
+{
+	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
+	struct inet6_dev *idev = ifp->idev;
+	struct in6_addr unspec;
+	struct in6_addr mcaddr;
+
+	read_lock_bh(&idev->lock);
+	if (idev->dead) {
+		read_unlock_bh(&idev->lock);
+		goto out;
+	}
+	spin_lock_bh(&ifp->lock);
+	if (ifp->probes == 0) {
+		/*
+		 * DAD was successful
+		 */
+
+		ifp->flags &= ~IFA_F_TENTATIVE;
+		spin_unlock_bh(&ifp->lock);
+		read_unlock_bh(&idev->lock);
+
+		addrconf_dad_completed(ifp);
+
+		goto out;
+	}
+
+	ifp->probes--;
+	addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
+	spin_unlock_bh(&ifp->lock);
+	read_unlock_bh(&idev->lock);
+
+	/* send a neighbour solicitation for our addr */
+	memset(&unspec, 0, sizeof(unspec));
+	addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
+	ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
+out:
+	in6_ifa_put(ifp);
+}
+
+static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
+{
+	struct net_device *	dev = ifp->idev->dev;
+
+	/*
+	 *	Configure the address for reception. Now it is valid.
+	 */
+
+	ipv6_ifa_notify(RTM_NEWADDR, ifp);
+
+	/* If added prefix is link local and forwarding is off,
+	   start sending router solicitations.
+	 */
+
+	if (ifp->idev->cnf.forwarding == 0 &&
+	    ifp->idev->cnf.rtr_solicits > 0 &&
+	    (dev->flags&IFF_LOOPBACK) == 0 &&
+	    (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
+		struct in6_addr all_routers;
+
+		ipv6_addr_all_routers(&all_routers);
+
+		/*
+		 *	If a host as already performed a random delay
+		 *	[...] as part of DAD [...] there is no need
+		 *	to delay again before sending the first RS
+		 */
+		ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
+
+		spin_lock_bh(&ifp->lock);
+		ifp->probes = 1;
+		ifp->idev->if_flags |= IF_RS_SENT;
+		addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
+		spin_unlock_bh(&ifp->lock);
+	}
+}
+
+#ifdef CONFIG_PROC_FS
+struct if6_iter_state {
+	int bucket;
+};
+
+static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
+{
+	struct inet6_ifaddr *ifa = NULL;
+	struct if6_iter_state *state = seq->private;
+
+	for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
+		ifa = inet6_addr_lst[state->bucket];
+		if (ifa)
+			break;
+	}
+	return ifa;
+}
+
+static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
+{
+	struct if6_iter_state *state = seq->private;
+
+	ifa = ifa->lst_next;
+try_again:
+	if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
+		ifa = inet6_addr_lst[state->bucket];
+		goto try_again;
+	}
+	return ifa;
+}
+
+static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
+{
+	struct inet6_ifaddr *ifa = if6_get_first(seq);
+
+	if (ifa)
+		while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
+			--pos;
+	return pos ? NULL : ifa;
+}
+
+static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	read_lock_bh(&addrconf_hash_lock);
+	return if6_get_idx(seq, *pos);
+}
+
+static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct inet6_ifaddr *ifa;
+
+	ifa = if6_get_next(seq, v);
+	++*pos;
+	return ifa;
+}
+
+static void if6_seq_stop(struct seq_file *seq, void *v)
+{
+	read_unlock_bh(&addrconf_hash_lock);
+}
+
+static int if6_seq_show(struct seq_file *seq, void *v)
+{
+	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
+	seq_printf(seq,
+		   "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
+		   NIP6(ifp->addr),
+		   ifp->idev->dev->ifindex,
+		   ifp->prefix_len,
+		   ifp->scope,
+		   ifp->flags,
+		   ifp->idev->dev->name);
+	return 0;
+}
+
+static struct seq_operations if6_seq_ops = {
+	.start	= if6_seq_start,
+	.next	= if6_seq_next,
+	.show	= if6_seq_show,
+	.stop	= if6_seq_stop,
+};
+
+static int if6_seq_open(struct inode *inode, struct file *file)
+{
+	struct seq_file *seq;
+	int rc = -ENOMEM;
+	struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+
+	if (!s)
+		goto out;
+	memset(s, 0, sizeof(*s));
+
+	rc = seq_open(file, &if6_seq_ops);
+	if (rc)
+		goto out_kfree;
+
+	seq = file->private_data;
+	seq->private = s;
+out:
+	return rc;
+out_kfree:
+	kfree(s);
+	goto out;
+}
+
+static struct file_operations if6_fops = {
+	.owner		= THIS_MODULE,
+	.open		= if6_seq_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release_private,
+};
+
+int __init if6_proc_init(void)
+{
+	if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
+		return -ENOMEM;
+	return 0;
+}
+
+void if6_proc_exit(void)
+{
+	proc_net_remove("if_inet6");
+}
+#endif	/* CONFIG_PROC_FS */
+
+/*
+ *	Periodic address status verification
+ */
+
+static void addrconf_verify(unsigned long foo)
+{
+	struct inet6_ifaddr *ifp;
+	unsigned long now, next;
+	int i;
+
+	spin_lock_bh(&addrconf_verify_lock);
+	now = jiffies;
+	next = now + ADDR_CHECK_FREQUENCY;
+
+	del_timer(&addr_chk_timer);
+
+	for (i=0; i < IN6_ADDR_HSIZE; i++) {
+
+restart:
+		write_lock(&addrconf_hash_lock);
+		for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
+			unsigned long age;
+#ifdef CONFIG_IPV6_PRIVACY
+			unsigned long regen_advance;
+#endif
+
+			if (ifp->flags & IFA_F_PERMANENT)
+				continue;
+
+			spin_lock(&ifp->lock);
+			age = (now - ifp->tstamp) / HZ;
+
+#ifdef CONFIG_IPV6_PRIVACY
+			regen_advance = ifp->idev->cnf.regen_max_retry * 
+					ifp->idev->cnf.dad_transmits * 
+					ifp->idev->nd_parms->retrans_time / HZ;
+#endif
+
+			if (age >= ifp->valid_lft) {
+				spin_unlock(&ifp->lock);
+				in6_ifa_hold(ifp);
+				write_unlock(&addrconf_hash_lock);
+				ipv6_del_addr(ifp);
+				goto restart;
+			} else if (age >= ifp->prefered_lft) {
+				/* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
+				int deprecate = 0;
+
+				if (!(ifp->flags&IFA_F_DEPRECATED)) {
+					deprecate = 1;
+					ifp->flags |= IFA_F_DEPRECATED;
+				}
+
+				if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
+					next = ifp->tstamp + ifp->valid_lft * HZ;
+
+				spin_unlock(&ifp->lock);
+
+				if (deprecate) {
+					in6_ifa_hold(ifp);
+					write_unlock(&addrconf_hash_lock);
+
+					ipv6_ifa_notify(0, ifp);
+					in6_ifa_put(ifp);
+					goto restart;
+				}
+#ifdef CONFIG_IPV6_PRIVACY
+			} else if ((ifp->flags&IFA_F_TEMPORARY) &&
+				   !(ifp->flags&IFA_F_TENTATIVE)) {
+				if (age >= ifp->prefered_lft - regen_advance) {
+					struct inet6_ifaddr *ifpub = ifp->ifpub;
+					if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
+						next = ifp->tstamp + ifp->prefered_lft * HZ;
+					if (!ifp->regen_count && ifpub) {
+						ifp->regen_count++;
+						in6_ifa_hold(ifp);
+						in6_ifa_hold(ifpub);
+						spin_unlock(&ifp->lock);
+						write_unlock(&addrconf_hash_lock);
+						ipv6_create_tempaddr(ifpub, ifp);
+						in6_ifa_put(ifpub);
+						in6_ifa_put(ifp);
+						goto restart;
+					}
+				} else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
+					next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
+				spin_unlock(&ifp->lock);
+#endif
+			} else {
+				/* ifp->prefered_lft <= ifp->valid_lft */
+				if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
+					next = ifp->tstamp + ifp->prefered_lft * HZ;
+				spin_unlock(&ifp->lock);
+			}
+		}
+		write_unlock(&addrconf_hash_lock);
+	}
+
+	addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
+	add_timer(&addr_chk_timer);
+	spin_unlock_bh(&addrconf_verify_lock);
+}
+
+static int
+inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+	struct rtattr **rta = arg;
+	struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
+	struct in6_addr *pfx;
+
+	pfx = NULL;
+	if (rta[IFA_ADDRESS-1]) {
+		if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
+			return -EINVAL;
+		pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
+	}
+	if (rta[IFA_LOCAL-1]) {
+		if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
+			return -EINVAL;
+		pfx = RTA_DATA(rta[IFA_LOCAL-1]);
+	}
+	if (pfx == NULL)
+		return -EINVAL;
+
+	return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
+}
+
+static int
+inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+	struct rtattr  **rta = arg;
+	struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
+	struct in6_addr *pfx;
+
+	pfx = NULL;
+	if (rta[IFA_ADDRESS-1]) {
+		if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
+			return -EINVAL;
+		pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
+	}
+	if (rta[IFA_LOCAL-1]) {
+		if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
+			return -EINVAL;
+		pfx = RTA_DATA(rta[IFA_LOCAL-1]);
+	}
+	if (pfx == NULL)
+		return -EINVAL;
+
+	return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
+}
+
+static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
+			     u32 pid, u32 seq, int event)
+{
+	struct ifaddrmsg *ifm;
+	struct nlmsghdr  *nlh;
+	struct ifa_cacheinfo ci;
+	unsigned char	 *b = skb->tail;
+
+	nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
+	if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+	ifm = NLMSG_DATA(nlh);
+	ifm->ifa_family = AF_INET6;
+	ifm->ifa_prefixlen = ifa->prefix_len;
+	ifm->ifa_flags = ifa->flags;
+	ifm->ifa_scope = RT_SCOPE_UNIVERSE;
+	if (ifa->scope&IFA_HOST)
+		ifm->ifa_scope = RT_SCOPE_HOST;
+	else if (ifa->scope&IFA_LINK)
+		ifm->ifa_scope = RT_SCOPE_LINK;
+	else if (ifa->scope&IFA_SITE)
+		ifm->ifa_scope = RT_SCOPE_SITE;
+	ifm->ifa_index = ifa->idev->dev->ifindex;
+	RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
+	if (!(ifa->flags&IFA_F_PERMANENT)) {
+		ci.ifa_prefered = ifa->prefered_lft;
+		ci.ifa_valid = ifa->valid_lft;
+		if (ci.ifa_prefered != INFINITY_LIFE_TIME) {
+			long tval = (jiffies - ifa->tstamp)/HZ;
+			ci.ifa_prefered -= tval;
+			if (ci.ifa_valid != INFINITY_LIFE_TIME)
+				ci.ifa_valid -= tval;
+		}
+	} else {
+		ci.ifa_prefered = INFINITY_LIFE_TIME;
+		ci.ifa_valid = INFINITY_LIFE_TIME;
+	}
+	ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100
+		    + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
+	ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100
+		    + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
+	RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
+	nlh->nlmsg_len = skb->tail - b;
+	return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+	skb_trim(skb, b - skb->data);
+	return -1;
+}
+
+static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
+				u32 pid, u32 seq, int event)
+{
+	struct ifaddrmsg *ifm;
+	struct nlmsghdr  *nlh;
+	struct ifa_cacheinfo ci;
+	unsigned char	 *b = skb->tail;
+
+	nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
+	if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+	ifm = NLMSG_DATA(nlh);
+	ifm->ifa_family = AF_INET6;	
+	ifm->ifa_prefixlen = 128;
+	ifm->ifa_flags = IFA_F_PERMANENT;
+	ifm->ifa_scope = RT_SCOPE_UNIVERSE;
+	if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
+		ifm->ifa_scope = RT_SCOPE_SITE;
+	ifm->ifa_index = ifmca->idev->dev->ifindex;
+	RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
+	ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ
+		    * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ
+		    * 100 / HZ);
+	ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ
+		    * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ
+		    * 100 / HZ);
+	ci.ifa_prefered = INFINITY_LIFE_TIME;
+	ci.ifa_valid = INFINITY_LIFE_TIME;
+	RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
+	nlh->nlmsg_len = skb->tail - b;
+	return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+	skb_trim(skb, b - skb->data);
+	return -1;
+}
+
+static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
+				u32 pid, u32 seq, int event)
+{
+	struct ifaddrmsg *ifm;
+	struct nlmsghdr  *nlh;
+	struct ifa_cacheinfo ci;
+	unsigned char	 *b = skb->tail;
+
+	nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
+	if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+	ifm = NLMSG_DATA(nlh);
+	ifm->ifa_family = AF_INET6;	
+	ifm->ifa_prefixlen = 128;
+	ifm->ifa_flags = IFA_F_PERMANENT;
+	ifm->ifa_scope = RT_SCOPE_UNIVERSE;
+	if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
+		ifm->ifa_scope = RT_SCOPE_SITE;
+	ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
+	RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
+	ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ
+		    * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ
+		    * 100 / HZ);
+	ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ
+		    * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ
+		    * 100 / HZ);
+	ci.ifa_prefered = INFINITY_LIFE_TIME;
+	ci.ifa_valid = INFINITY_LIFE_TIME;
+	RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
+	nlh->nlmsg_len = skb->tail - b;
+	return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+	skb_trim(skb, b - skb->data);
+	return -1;
+}
+
+enum addr_type_t
+{
+	UNICAST_ADDR,
+	MULTICAST_ADDR,
+	ANYCAST_ADDR,
+};
+
+static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
+			   enum addr_type_t type)
+{
+	int idx, ip_idx;
+	int s_idx, s_ip_idx;
+	int err = 1;
+	struct net_device *dev;
+	struct inet6_dev *idev = NULL;
+	struct inet6_ifaddr *ifa;
+	struct ifmcaddr6 *ifmca;
+	struct ifacaddr6 *ifaca;
+
+	s_idx = cb->args[0];
+	s_ip_idx = ip_idx = cb->args[1];
+	read_lock(&dev_base_lock);
+	
+	for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
+		if (idx < s_idx)
+			continue;
+		if (idx > s_idx)
+			s_ip_idx = 0;
+		ip_idx = 0;
+		if ((idev = in6_dev_get(dev)) == NULL)
+			continue;
+		read_lock_bh(&idev->lock);
+		switch (type) {
+		case UNICAST_ADDR:
+			/* unicast address */
+			for (ifa = idev->addr_list; ifa;
+			     ifa = ifa->if_next, ip_idx++) {
+				if (ip_idx < s_ip_idx)
+					continue;
+				if ((err = inet6_fill_ifaddr(skb, ifa, 
+				    NETLINK_CB(cb->skb).pid, 
+				    cb->nlh->nlmsg_seq, RTM_NEWADDR)) <= 0)
+					goto done;
+			}
+			/* temp addr */
+#ifdef CONFIG_IPV6_PRIVACY
+			for (ifa = idev->tempaddr_list; ifa; 
+			     ifa = ifa->tmp_next, ip_idx++) {
+				if (ip_idx < s_ip_idx)
+					continue;
+				if ((err = inet6_fill_ifaddr(skb, ifa, 
+				    NETLINK_CB(cb->skb).pid, 
+				    cb->nlh->nlmsg_seq, RTM_NEWADDR)) <= 0) 
+					goto done;
+			}
+#endif
+			break;
+		case MULTICAST_ADDR:
+			/* multicast address */
+			for (ifmca = idev->mc_list; ifmca; 
+			     ifmca = ifmca->next, ip_idx++) {
+				if (ip_idx < s_ip_idx)
+					continue;
+				if ((err = inet6_fill_ifmcaddr(skb, ifmca, 
+				    NETLINK_CB(cb->skb).pid, 
+				    cb->nlh->nlmsg_seq, RTM_GETMULTICAST)) <= 0)
+					goto done;
+			}
+			break;
+		case ANYCAST_ADDR:
+			/* anycast address */
+			for (ifaca = idev->ac_list; ifaca;
+			     ifaca = ifaca->aca_next, ip_idx++) {
+				if (ip_idx < s_ip_idx)
+					continue;
+				if ((err = inet6_fill_ifacaddr(skb, ifaca, 
+				    NETLINK_CB(cb->skb).pid, 
+				    cb->nlh->nlmsg_seq, RTM_GETANYCAST)) <= 0) 
+					goto done;
+			}
+			break;
+		default:
+			break;
+		}
+		read_unlock_bh(&idev->lock);
+		in6_dev_put(idev);
+	}
+done:
+	if (err <= 0) {
+		read_unlock_bh(&idev->lock);
+		in6_dev_put(idev);
+	}
+	read_unlock(&dev_base_lock);
+	cb->args[0] = idx;
+	cb->args[1] = ip_idx;
+	return skb->len;
+}
+
+static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	enum addr_type_t type = UNICAST_ADDR;
+	return inet6_dump_addr(skb, cb, type);
+}
+
+static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	enum addr_type_t type = MULTICAST_ADDR;
+	return inet6_dump_addr(skb, cb, type);
+}
+
+
+static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	enum addr_type_t type = ANYCAST_ADDR;
+	return inet6_dump_addr(skb, cb, type);
+}
+
+static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
+{
+	struct sk_buff *skb;
+	int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
+
+	skb = alloc_skb(size, GFP_ATOMIC);
+	if (!skb) {
+		netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, ENOBUFS);
+		return;
+	}
+	if (inet6_fill_ifaddr(skb, ifa, 0, 0, event) < 0) {
+		kfree_skb(skb);
+		netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, EINVAL);
+		return;
+	}
+	NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFADDR;
+	netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFADDR, GFP_ATOMIC);
+}
+
+static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
+				__s32 *array, int bytes)
+{
+	memset(array, 0, bytes);
+	array[DEVCONF_FORWARDING] = cnf->forwarding;
+	array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
+	array[DEVCONF_MTU6] = cnf->mtu6;
+	array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
+	array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
+	array[DEVCONF_AUTOCONF] = cnf->autoconf;
+	array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
+	array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
+	array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
+	array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
+	array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
+#ifdef CONFIG_IPV6_PRIVACY
+	array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
+	array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
+	array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
+	array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
+	array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
+#endif
+	array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
+}
+
+static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, 
+			     u32 pid, u32 seq, int event)
+{
+	struct net_device	*dev = idev->dev;
+	__s32			*array = NULL;
+	struct ifinfomsg	*r;
+	struct nlmsghdr 	*nlh;
+	unsigned char		*b = skb->tail;
+	struct rtattr		*subattr;
+	__u32			mtu = dev->mtu;
+	struct ifla_cacheinfo	ci;
+
+	nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*r));
+	if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+	r = NLMSG_DATA(nlh);
+	r->ifi_family = AF_INET6;
+	r->ifi_type = dev->type;
+	r->ifi_index = dev->ifindex;
+	r->ifi_flags = dev_get_flags(dev);
+	r->ifi_change = 0;
+
+	RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
+
+	if (dev->addr_len)
+		RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
+
+	RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
+	if (dev->ifindex != dev->iflink)
+		RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
+			
+	subattr = (struct rtattr*)skb->tail;
+
+	RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
+
+	/* return the device flags */
+	RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
+
+	/* return interface cacheinfo */
+	ci.max_reasm_len = IPV6_MAXPLEN;
+	ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
+		    + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
+	ci.reachable_time = idev->nd_parms->reachable_time;
+	ci.retrans_time = idev->nd_parms->retrans_time;
+	RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
+	
+	/* return the device sysctl params */
+	if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
+		goto rtattr_failure;
+	ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
+	RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
+
+	/* XXX - Statistics/MC not implemented */
+	subattr->rta_len = skb->tail - (u8*)subattr;
+
+	nlh->nlmsg_len = skb->tail - b;
+	kfree(array);
+	return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+	if (array)
+		kfree(array);
+	skb_trim(skb, b - skb->data);
+	return -1;
+}
+
+static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	int idx, err;
+	int s_idx = cb->args[0];
+	struct net_device *dev;
+	struct inet6_dev *idev;
+
+	read_lock(&dev_base_lock);
+	for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
+		if (idx < s_idx)
+			continue;
+		if ((idev = in6_dev_get(dev)) == NULL)
+			continue;
+		err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, 
+				cb->nlh->nlmsg_seq, RTM_NEWLINK);
+		in6_dev_put(idev);
+		if (err <= 0)
+			break;
+	}
+	read_unlock(&dev_base_lock);
+	cb->args[0] = idx;
+
+	return skb->len;
+}
+
+void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
+{
+	struct sk_buff *skb;
+	/* 128 bytes ?? */
+	int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128);
+	
+	skb = alloc_skb(size, GFP_ATOMIC);
+	if (!skb) {
+		netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, ENOBUFS);
+		return;
+	}
+	if (inet6_fill_ifinfo(skb, idev, 0, 0, event) < 0) {
+		kfree_skb(skb);
+		netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, EINVAL);
+		return;
+	}
+	NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFINFO;
+	netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFINFO, GFP_ATOMIC);
+}
+
+static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
+			struct prefix_info *pinfo, u32 pid, u32 seq, int event)
+{
+	struct prefixmsg	*pmsg;
+	struct nlmsghdr 	*nlh;
+	unsigned char		*b = skb->tail;
+	struct prefix_cacheinfo	ci;
+
+	nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*pmsg));
+	
+	if (pid) 
+		nlh->nlmsg_flags |= NLM_F_MULTI;
+	
+	pmsg = NLMSG_DATA(nlh);
+	pmsg->prefix_family = AF_INET6;
+	pmsg->prefix_ifindex = idev->dev->ifindex;
+	pmsg->prefix_len = pinfo->prefix_len;
+	pmsg->prefix_type = pinfo->type;
+	
+	pmsg->prefix_flags = 0;
+	if (pinfo->onlink)
+		pmsg->prefix_flags |= IF_PREFIX_ONLINK;
+	if (pinfo->autoconf)
+		pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
+
+	RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
+
+	ci.preferred_time = ntohl(pinfo->prefered);
+	ci.valid_time = ntohl(pinfo->valid);
+	RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
+
+	nlh->nlmsg_len = skb->tail - b;
+	return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+	skb_trim(skb, b - skb->data);
+	return -1;
+}
+
+static void inet6_prefix_notify(int event, struct inet6_dev *idev, 
+			 struct prefix_info *pinfo)
+{
+	struct sk_buff *skb;
+	int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128);
+
+	skb = alloc_skb(size, GFP_ATOMIC);
+	if (!skb) {
+		netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, ENOBUFS);
+		return;
+	}
+	if (inet6_fill_prefix(skb, idev, pinfo, 0, 0, event) < 0) {
+		kfree_skb(skb);
+		netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, EINVAL);
+		return;
+	}
+	NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_PREFIX;
+	netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_PREFIX, GFP_ATOMIC);
+}
+
+static struct rtnetlink_link inet6_rtnetlink_table[RTM_MAX - RTM_BASE + 1] = {
+	[RTM_GETLINK - RTM_BASE] = { .dumpit	= inet6_dump_ifinfo, },
+	[RTM_NEWADDR - RTM_BASE] = { .doit	= inet6_rtm_newaddr, },
+	[RTM_DELADDR - RTM_BASE] = { .doit	= inet6_rtm_deladdr, },
+	[RTM_GETADDR - RTM_BASE] = { .dumpit	= inet6_dump_ifaddr, },
+	[RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
+	[RTM_GETANYCAST - RTM_BASE] = { .dumpit	= inet6_dump_ifacaddr, },
+	[RTM_NEWROUTE - RTM_BASE] = { .doit	= inet6_rtm_newroute, },
+	[RTM_DELROUTE - RTM_BASE] = { .doit	= inet6_rtm_delroute, },
+	[RTM_GETROUTE - RTM_BASE] = { .doit	= inet6_rtm_getroute,
+				      .dumpit	= inet6_dump_fib, },
+};
+
+static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
+{
+	inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
+
+	switch (event) {
+	case RTM_NEWADDR:
+		dst_hold(&ifp->rt->u.dst);
+		if (ip6_ins_rt(ifp->rt, NULL, NULL))
+			dst_release(&ifp->rt->u.dst);
+		if (ifp->idev->cnf.forwarding)
+			addrconf_join_anycast(ifp);
+		break;
+	case RTM_DELADDR:
+		if (ifp->idev->cnf.forwarding)
+			addrconf_leave_anycast(ifp);
+		addrconf_leave_solict(ifp->idev, &ifp->addr);
+		dst_hold(&ifp->rt->u.dst);
+		if (ip6_del_rt(ifp->rt, NULL, NULL))
+			dst_free(&ifp->rt->u.dst);
+		else
+			dst_release(&ifp->rt->u.dst);
+		break;
+	}
+}
+
+static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
+{
+	read_lock_bh(&addrconf_lock);
+	if (likely(ifp->idev->dead == 0))
+		__ipv6_ifa_notify(event, ifp);
+	read_unlock_bh(&addrconf_lock);
+}
+
+#ifdef CONFIG_SYSCTL
+
+static
+int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
+			   void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	int *valp = ctl->data;
+	int val = *valp;
+	int ret;
+
+	ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+
+	if (write && valp != &ipv6_devconf_dflt.forwarding) {
+		if (valp != &ipv6_devconf.forwarding) {
+			if ((!*valp) ^ (!val)) {
+				struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
+				if (idev == NULL)
+					return ret;
+				dev_forward_change(idev);
+			}
+		} else {
+			ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
+			addrconf_forward_change();
+		}
+		if (*valp)
+			rt6_purge_dflt_routers();
+	}
+
+        return ret;
+}
+
+static int addrconf_sysctl_forward_strategy(ctl_table *table, 
+					    int __user *name, int nlen,
+					    void __user *oldval,
+					    size_t __user *oldlenp,
+					    void __user *newval, size_t newlen,
+					    void **context)
+{
+	int *valp = table->data;
+	int new;
+
+	if (!newval || !newlen)
+		return 0;
+	if (newlen != sizeof(int))
+		return -EINVAL;
+	if (get_user(new, (int __user *)newval))
+		return -EFAULT;
+	if (new == *valp)
+		return 0;
+	if (oldval && oldlenp) {
+		size_t len;
+		if (get_user(len, oldlenp))
+			return -EFAULT;
+		if (len) {
+			if (len > table->maxlen)
+				len = table->maxlen;
+			if (copy_to_user(oldval, valp, len))
+				return -EFAULT;
+			if (put_user(len, oldlenp))
+				return -EFAULT;
+		}
+	}
+
+	if (valp != &ipv6_devconf_dflt.forwarding) {
+		if (valp != &ipv6_devconf.forwarding) {
+			struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
+			int changed;
+			if (unlikely(idev == NULL))
+				return -ENODEV;
+			changed = (!*valp) ^ (!new);
+			*valp = new;
+			if (changed)
+				dev_forward_change(idev);
+		} else {
+			*valp = new;
+			addrconf_forward_change();
+		}
+
+		if (*valp)
+			rt6_purge_dflt_routers();
+	} else
+		*valp = new;
+
+	return 1;
+}
+
+static struct addrconf_sysctl_table
+{
+	struct ctl_table_header *sysctl_header;
+	ctl_table addrconf_vars[__NET_IPV6_MAX];
+	ctl_table addrconf_dev[2];
+	ctl_table addrconf_conf_dir[2];
+	ctl_table addrconf_proto_dir[2];
+	ctl_table addrconf_root_dir[2];
+} addrconf_sysctl = {
+	.sysctl_header = NULL,
+	.addrconf_vars = {
+        	{
+			.ctl_name	=	NET_IPV6_FORWARDING,
+			.procname	=	"forwarding",
+         		.data		=	&ipv6_devconf.forwarding,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&addrconf_sysctl_forward,
+			.strategy	=	&addrconf_sysctl_forward_strategy,
+		},
+		{
+			.ctl_name	=	NET_IPV6_HOP_LIMIT,
+			.procname	=	"hop_limit",
+         		.data		=	&ipv6_devconf.hop_limit,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+			.proc_handler	=	proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_MTU,
+			.procname	=	"mtu",
+			.data		=	&ipv6_devconf.mtu6,
+         		.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_ACCEPT_RA,
+			.procname	=	"accept_ra",
+         		.data		=	&ipv6_devconf.accept_ra,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_ACCEPT_REDIRECTS,
+			.procname	=	"accept_redirects",
+         		.data		=	&ipv6_devconf.accept_redirects,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_AUTOCONF,
+			.procname	=	"autoconf",
+         		.data		=	&ipv6_devconf.autoconf,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_DAD_TRANSMITS,
+			.procname	=	"dad_transmits",
+         		.data		=	&ipv6_devconf.dad_transmits,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_RTR_SOLICITS,
+			.procname	=	"router_solicitations",
+         		.data		=	&ipv6_devconf.rtr_solicits,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_RTR_SOLICIT_INTERVAL,
+			.procname	=	"router_solicitation_interval",
+         		.data		=	&ipv6_devconf.rtr_solicit_interval,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec_jiffies,
+			.strategy	=	&sysctl_jiffies,
+		},
+		{
+			.ctl_name	=	NET_IPV6_RTR_SOLICIT_DELAY,
+			.procname	=	"router_solicitation_delay",
+         		.data		=	&ipv6_devconf.rtr_solicit_delay,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec_jiffies,
+			.strategy	=	&sysctl_jiffies,
+		},
+		{
+			.ctl_name	=	NET_IPV6_FORCE_MLD_VERSION,
+			.procname	=	"force_mld_version",
+         		.data		=	&ipv6_devconf.force_mld_version,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+         		.proc_handler	=	&proc_dointvec,
+		},
+#ifdef CONFIG_IPV6_PRIVACY
+		{
+			.ctl_name	=	NET_IPV6_USE_TEMPADDR,
+			.procname	=	"use_tempaddr",
+	 		.data		=	&ipv6_devconf.use_tempaddr,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+	 		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_TEMP_VALID_LFT,
+			.procname	=	"temp_valid_lft",
+	 		.data		=	&ipv6_devconf.temp_valid_lft,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+	 		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_TEMP_PREFERED_LFT,
+			.procname	=	"temp_prefered_lft",
+	 		.data		=	&ipv6_devconf.temp_prefered_lft,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+	 		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_REGEN_MAX_RETRY,
+			.procname	=	"regen_max_retry",
+	 		.data		=	&ipv6_devconf.regen_max_retry,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+	 		.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	NET_IPV6_MAX_DESYNC_FACTOR,
+			.procname	=	"max_desync_factor",
+	 		.data		=	&ipv6_devconf.max_desync_factor,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+	 		.proc_handler	=	&proc_dointvec,
+		},
+#endif
+		{
+			.ctl_name	=	NET_IPV6_MAX_ADDRESSES,
+			.procname	=	"max_addresses",
+			.data		=	&ipv6_devconf.max_addresses,
+			.maxlen		=	sizeof(int),
+			.mode		=	0644,
+			.proc_handler	=	&proc_dointvec,
+		},
+		{
+			.ctl_name	=	0,	/* sentinel */
+		}
+	},
+	.addrconf_dev = {
+		{
+			.ctl_name	=	NET_PROTO_CONF_ALL,
+			.procname	=	"all",
+			.mode		=	0555,
+			.child		=	addrconf_sysctl.addrconf_vars,
+		},
+		{
+			.ctl_name	=	0,	/* sentinel */
+		}
+	},
+	.addrconf_conf_dir = {
+		{
+			.ctl_name	=	NET_IPV6_CONF,
+			.procname	=	"conf",
+			.mode		=	0555,
+			.child		=	addrconf_sysctl.addrconf_dev,
+		},
+		{
+			.ctl_name	=	0,	/* sentinel */
+		}
+	},
+	.addrconf_proto_dir = {
+		{
+			.ctl_name	=	NET_IPV6,
+			.procname	=	"ipv6",
+			.mode		=	0555,
+			.child		=	addrconf_sysctl.addrconf_conf_dir,
+		},
+		{
+			.ctl_name	=	0,	/* sentinel */
+		}
+	},
+	.addrconf_root_dir = {
+		{
+			.ctl_name	=	CTL_NET,
+			.procname	=	"net",
+			.mode		=	0555,
+			.child		=	addrconf_sysctl.addrconf_proto_dir,
+		},
+		{
+			.ctl_name	=	0,	/* sentinel */
+		}
+	},
+};
+
+static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
+{
+	int i;
+	struct net_device *dev = idev ? idev->dev : NULL;
+	struct addrconf_sysctl_table *t;
+	char *dev_name = NULL;
+
+	t = kmalloc(sizeof(*t), GFP_KERNEL);
+	if (t == NULL)
+		return;
+	memcpy(t, &addrconf_sysctl, sizeof(*t));
+	for (i=0; t->addrconf_vars[i].data; i++) {
+		t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
+		t->addrconf_vars[i].de = NULL;
+		t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
+	}
+	if (dev) {
+		dev_name = dev->name; 
+		t->addrconf_dev[0].ctl_name = dev->ifindex;
+	} else {
+		dev_name = "default";
+		t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
+	}
+
+	/* 
+	 * Make a copy of dev_name, because '.procname' is regarded as const 
+	 * by sysctl and we wouldn't want anyone to change it under our feet
+	 * (see SIOCSIFNAME).
+	 */	
+	dev_name = net_sysctl_strdup(dev_name);
+	if (!dev_name)
+	    goto free;
+
+	t->addrconf_dev[0].procname = dev_name;
+
+	t->addrconf_dev[0].child = t->addrconf_vars;
+	t->addrconf_dev[0].de = NULL;
+	t->addrconf_conf_dir[0].child = t->addrconf_dev;
+	t->addrconf_conf_dir[0].de = NULL;
+	t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
+	t->addrconf_proto_dir[0].de = NULL;
+	t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
+	t->addrconf_root_dir[0].de = NULL;
+
+	t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
+	if (t->sysctl_header == NULL)
+		goto free_procname;
+	else
+		p->sysctl = t;
+	return;
+
+	/* error path */
+ free_procname:
+	kfree(dev_name);
+ free:
+	kfree(t);
+
+	return;
+}
+
+static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
+{
+	if (p->sysctl) {
+		struct addrconf_sysctl_table *t = p->sysctl;
+		p->sysctl = NULL;
+		unregister_sysctl_table(t->sysctl_header);
+		kfree(t->addrconf_dev[0].procname);
+		kfree(t);
+	}
+}
+
+
+#endif
+
+/*
+ *      Device notifier
+ */
+
+int register_inet6addr_notifier(struct notifier_block *nb)
+{
+        return notifier_chain_register(&inet6addr_chain, nb);
+}
+
+int unregister_inet6addr_notifier(struct notifier_block *nb)
+{
+        return notifier_chain_unregister(&inet6addr_chain,nb);
+}
+
+/*
+ *	Init / cleanup code
+ */
+
+int __init addrconf_init(void)
+{
+	int err = 0;
+
+	/* The addrconf netdev notifier requires that loopback_dev
+	 * has it's ipv6 private information allocated and setup
+	 * before it can bring up and give link-local addresses
+	 * to other devices which are up.
+	 *
+	 * Unfortunately, loopback_dev is not necessarily the first
+	 * entry in the global dev_base list of net devices.  In fact,
+	 * it is likely to be the very last entry on that list.
+	 * So this causes the notifier registry below to try and
+	 * give link-local addresses to all devices besides loopback_dev
+	 * first, then loopback_dev, which cases all the non-loopback_dev
+	 * devices to fail to get a link-local address.
+	 *
+	 * So, as a temporary fix, allocate the ipv6 structure for
+	 * loopback_dev first by hand.
+	 * Longer term, all of the dependencies ipv6 has upon the loopback
+	 * device and it being up should be removed.
+	 */
+	rtnl_lock();
+	if (!ipv6_add_dev(&loopback_dev))
+		err = -ENOMEM;
+	rtnl_unlock();
+	if (err)
+		return err;
+
+	register_netdevice_notifier(&ipv6_dev_notf);
+
+#ifdef CONFIG_IPV6_PRIVACY
+	md5_tfm = crypto_alloc_tfm("md5", 0);
+	if (unlikely(md5_tfm == NULL))
+		printk(KERN_WARNING
+			"failed to load transform for md5\n");
+#endif
+
+	addrconf_verify(0);
+	rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
+#ifdef CONFIG_SYSCTL
+	addrconf_sysctl.sysctl_header =
+		register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
+	addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
+#endif
+
+	return 0;
+}
+
+void __exit addrconf_cleanup(void)
+{
+ 	struct net_device *dev;
+ 	struct inet6_dev *idev;
+ 	struct inet6_ifaddr *ifa;
+	int i;
+
+	unregister_netdevice_notifier(&ipv6_dev_notf);
+
+	rtnetlink_links[PF_INET6] = NULL;
+#ifdef CONFIG_SYSCTL
+	addrconf_sysctl_unregister(&ipv6_devconf_dflt);
+	addrconf_sysctl_unregister(&ipv6_devconf);
+#endif
+
+	rtnl_lock();
+
+	/*
+	 *	clean dev list.
+	 */
+
+	for (dev=dev_base; dev; dev=dev->next) {
+		if ((idev = __in6_dev_get(dev)) == NULL)
+			continue;
+		addrconf_ifdown(dev, 1);
+	}
+	addrconf_ifdown(&loopback_dev, 2);
+
+	/*
+	 *	Check hash table.
+	 */
+
+	write_lock_bh(&addrconf_hash_lock);
+	for (i=0; i < IN6_ADDR_HSIZE; i++) {
+		for (ifa=inet6_addr_lst[i]; ifa; ) {
+			struct inet6_ifaddr *bifa;
+
+			bifa = ifa;
+			ifa = ifa->lst_next;
+			printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
+			/* Do not free it; something is wrong.
+			   Now we can investigate it with debugger.
+			 */
+		}
+	}
+	write_unlock_bh(&addrconf_hash_lock);
+
+	del_timer(&addr_chk_timer);
+
+	rtnl_unlock();
+
+#ifdef CONFIG_IPV6_PRIVACY
+	if (likely(md5_tfm != NULL)) {
+		crypto_free_tfm(md5_tfm);
+		md5_tfm = NULL;
+	}
+#endif
+
+#ifdef CONFIG_PROC_FS
+	proc_net_remove("if_inet6");
+#endif
+}