Linux-2.6.12-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, 1508 insertions, 0 deletions

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
new file mode 100644
index 000000000000..eea7ef010776
--- /dev/null
+++ b/net/ipv4/devinet.c
@@ -0,0 +1,1508 @@
+/*
+ *	NET3	IP device support routines.
+ *
+ *	Version: $Id: devinet.c,v 1.44 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.
+ *
+ *	Derived from the IP parts of dev.c 1.0.19
+ * 		Authors:	Ross Biro, <bir7@leland.Stanford.Edu>
+ *				Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *				Mark Evans, <evansmp@uhura.aston.ac.uk>
+ *
+ *	Additional Authors:
+ *		Alan Cox, <gw4pts@gw4pts.ampr.org>
+ *		Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ *	Changes:
+ *		Alexey Kuznetsov:	pa_* fields are replaced with ifaddr
+ *					lists.
+ *		Cyrus Durgin:		updated for kmod
+ *		Matthias Andree:	in devinet_ioctl, compare label and
+ *					address (4.4BSD alias style support),
+ *					fall back to comparing just the label
+ *					if no match found.
+ */
+
+#include <linux/config.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/in.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/if_ether.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/init.h>
+#include <linux/notifier.h>
+#include <linux/inetdevice.h>
+#include <linux/igmp.h>
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+#include <linux/kmod.h>
+
+#include <net/ip.h>
+#include <net/route.h>
+#include <net/ip_fib.h>
+
+struct ipv4_devconf ipv4_devconf = {
+	.accept_redirects = 1,
+	.send_redirects =  1,
+	.secure_redirects = 1,
+	.shared_media =	  1,
+};
+
+static struct ipv4_devconf ipv4_devconf_dflt = {
+	.accept_redirects =  1,
+	.send_redirects =    1,
+	.secure_redirects =  1,
+	.shared_media =	     1,
+	.accept_source_route = 1,
+};
+
+static void rtmsg_ifa(int event, struct in_ifaddr *);
+
+static struct notifier_block *inetaddr_chain;
+static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
+			 int destroy);
+#ifdef CONFIG_SYSCTL
+static void devinet_sysctl_register(struct in_device *in_dev,
+				    struct ipv4_devconf *p);
+static void devinet_sysctl_unregister(struct ipv4_devconf *p);
+#endif
+
+/* Locks all the inet devices. */
+
+static struct in_ifaddr *inet_alloc_ifa(void)
+{
+	struct in_ifaddr *ifa = kmalloc(sizeof(*ifa), GFP_KERNEL);
+
+	if (ifa) {
+		memset(ifa, 0, sizeof(*ifa));
+		INIT_RCU_HEAD(&ifa->rcu_head);
+	}
+
+	return ifa;
+}
+
+static void inet_rcu_free_ifa(struct rcu_head *head)
+{
+	struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head);
+	if (ifa->ifa_dev)
+		in_dev_put(ifa->ifa_dev);
+	kfree(ifa);
+}
+
+static inline void inet_free_ifa(struct in_ifaddr *ifa)
+{
+	call_rcu(&ifa->rcu_head, inet_rcu_free_ifa);
+}
+
+void in_dev_finish_destroy(struct in_device *idev)
+{
+	struct net_device *dev = idev->dev;
+
+	BUG_TRAP(!idev->ifa_list);
+	BUG_TRAP(!idev->mc_list);
+#ifdef NET_REFCNT_DEBUG
+	printk(KERN_DEBUG "in_dev_finish_destroy: %p=%s\n",
+	       idev, dev ? dev->name : "NIL");
+#endif
+	dev_put(dev);
+	if (!idev->dead)
+		printk("Freeing alive in_device %p\n", idev);
+	else {
+		kfree(idev);
+	}
+}
+
+struct in_device *inetdev_init(struct net_device *dev)
+{
+	struct in_device *in_dev;
+
+	ASSERT_RTNL();
+
+	in_dev = kmalloc(sizeof(*in_dev), GFP_KERNEL);
+	if (!in_dev)
+		goto out;
+	memset(in_dev, 0, sizeof(*in_dev));
+	INIT_RCU_HEAD(&in_dev->rcu_head);
+	memcpy(&in_dev->cnf, &ipv4_devconf_dflt, sizeof(in_dev->cnf));
+	in_dev->cnf.sysctl = NULL;
+	in_dev->dev = dev;
+	if ((in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl)) == NULL)
+		goto out_kfree;
+	/* Reference in_dev->dev */
+	dev_hold(dev);
+#ifdef CONFIG_SYSCTL
+	neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4,
+			      NET_IPV4_NEIGH, "ipv4", NULL, NULL);
+#endif
+
+	/* Account for reference dev->ip_ptr */
+	in_dev_hold(in_dev);
+	rcu_assign_pointer(dev->ip_ptr, in_dev);
+
+#ifdef CONFIG_SYSCTL
+	devinet_sysctl_register(in_dev, &in_dev->cnf);
+#endif
+	ip_mc_init_dev(in_dev);
+	if (dev->flags & IFF_UP)
+		ip_mc_up(in_dev);
+out:
+	return in_dev;
+out_kfree:
+	kfree(in_dev);
+	in_dev = NULL;
+	goto out;
+}
+
+static void in_dev_rcu_put(struct rcu_head *head)
+{
+	struct in_device *idev = container_of(head, struct in_device, rcu_head);
+	in_dev_put(idev);
+}
+
+static void inetdev_destroy(struct in_device *in_dev)
+{
+	struct in_ifaddr *ifa;
+	struct net_device *dev;
+
+	ASSERT_RTNL();
+
+	dev = in_dev->dev;
+	if (dev == &loopback_dev)
+		return;
+
+	in_dev->dead = 1;
+
+	ip_mc_destroy_dev(in_dev);
+
+	while ((ifa = in_dev->ifa_list) != NULL) {
+		inet_del_ifa(in_dev, &in_dev->ifa_list, 0);
+		inet_free_ifa(ifa);
+	}
+
+#ifdef CONFIG_SYSCTL
+	devinet_sysctl_unregister(&in_dev->cnf);
+#endif
+
+	dev->ip_ptr = NULL;
+
+#ifdef CONFIG_SYSCTL
+	neigh_sysctl_unregister(in_dev->arp_parms);
+#endif
+	neigh_parms_release(&arp_tbl, in_dev->arp_parms);
+	arp_ifdown(dev);
+
+	call_rcu(&in_dev->rcu_head, in_dev_rcu_put);
+}
+
+int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b)
+{
+	rcu_read_lock();
+	for_primary_ifa(in_dev) {
+		if (inet_ifa_match(a, ifa)) {
+			if (!b || inet_ifa_match(b, ifa)) {
+				rcu_read_unlock();
+				return 1;
+			}
+		}
+	} endfor_ifa(in_dev);
+	rcu_read_unlock();
+	return 0;
+}
+
+static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
+			 int destroy)
+{
+	struct in_ifaddr *ifa1 = *ifap;
+
+	ASSERT_RTNL();
+
+	/* 1. Deleting primary ifaddr forces deletion all secondaries */
+
+	if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) {
+		struct in_ifaddr *ifa;
+		struct in_ifaddr **ifap1 = &ifa1->ifa_next;
+
+		while ((ifa = *ifap1) != NULL) {
+			if (!(ifa->ifa_flags & IFA_F_SECONDARY) ||
+			    ifa1->ifa_mask != ifa->ifa_mask ||
+			    !inet_ifa_match(ifa1->ifa_address, ifa)) {
+				ifap1 = &ifa->ifa_next;
+				continue;
+			}
+
+			*ifap1 = ifa->ifa_next;
+
+			rtmsg_ifa(RTM_DELADDR, ifa);
+			notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa);
+			inet_free_ifa(ifa);
+		}
+	}
+
+	/* 2. Unlink it */
+
+	*ifap = ifa1->ifa_next;
+
+	/* 3. Announce address deletion */
+
+	/* Send message first, then call notifier.
+	   At first sight, FIB update triggered by notifier
+	   will refer to already deleted ifaddr, that could confuse
+	   netlink listeners. It is not true: look, gated sees
+	   that route deleted and if it still thinks that ifaddr
+	   is valid, it will try to restore deleted routes... Grr.
+	   So that, this order is correct.
+	 */
+	rtmsg_ifa(RTM_DELADDR, ifa1);
+	notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1);
+	if (destroy) {
+		inet_free_ifa(ifa1);
+
+		if (!in_dev->ifa_list)
+			inetdev_destroy(in_dev);
+	}
+}
+
+static int inet_insert_ifa(struct in_ifaddr *ifa)
+{
+	struct in_device *in_dev = ifa->ifa_dev;
+	struct in_ifaddr *ifa1, **ifap, **last_primary;
+
+	ASSERT_RTNL();
+
+	if (!ifa->ifa_local) {
+		inet_free_ifa(ifa);
+		return 0;
+	}
+
+	ifa->ifa_flags &= ~IFA_F_SECONDARY;
+	last_primary = &in_dev->ifa_list;
+
+	for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL;
+	     ifap = &ifa1->ifa_next) {
+		if (!(ifa1->ifa_flags & IFA_F_SECONDARY) &&
+		    ifa->ifa_scope <= ifa1->ifa_scope)
+			last_primary = &ifa1->ifa_next;
+		if (ifa1->ifa_mask == ifa->ifa_mask &&
+		    inet_ifa_match(ifa1->ifa_address, ifa)) {
+			if (ifa1->ifa_local == ifa->ifa_local) {
+				inet_free_ifa(ifa);
+				return -EEXIST;
+			}
+			if (ifa1->ifa_scope != ifa->ifa_scope) {
+				inet_free_ifa(ifa);
+				return -EINVAL;
+			}
+			ifa->ifa_flags |= IFA_F_SECONDARY;
+		}
+	}
+
+	if (!(ifa->ifa_flags & IFA_F_SECONDARY)) {
+		net_srandom(ifa->ifa_local);
+		ifap = last_primary;
+	}
+
+	ifa->ifa_next = *ifap;
+	*ifap = ifa;
+
+	/* Send message first, then call notifier.
+	   Notifier will trigger FIB update, so that
+	   listeners of netlink will know about new ifaddr */
+	rtmsg_ifa(RTM_NEWADDR, ifa);
+	notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa);
+
+	return 0;
+}
+
+static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa)
+{
+	struct in_device *in_dev = __in_dev_get(dev);
+
+	ASSERT_RTNL();
+
+	if (!in_dev) {
+		in_dev = inetdev_init(dev);
+		if (!in_dev) {
+			inet_free_ifa(ifa);
+			return -ENOBUFS;
+		}
+	}
+	if (ifa->ifa_dev != in_dev) {
+		BUG_TRAP(!ifa->ifa_dev);
+		in_dev_hold(in_dev);
+		ifa->ifa_dev = in_dev;
+	}
+	if (LOOPBACK(ifa->ifa_local))
+		ifa->ifa_scope = RT_SCOPE_HOST;
+	return inet_insert_ifa(ifa);
+}
+
+struct in_device *inetdev_by_index(int ifindex)
+{
+	struct net_device *dev;
+	struct in_device *in_dev = NULL;
+	read_lock(&dev_base_lock);
+	dev = __dev_get_by_index(ifindex);
+	if (dev)
+		in_dev = in_dev_get(dev);
+	read_unlock(&dev_base_lock);
+	return in_dev;
+}
+
+/* Called only from RTNL semaphored context. No locks. */
+
+struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix,
+				    u32 mask)
+{
+	ASSERT_RTNL();
+
+	for_primary_ifa(in_dev) {
+		if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa))
+			return ifa;
+	} endfor_ifa(in_dev);
+	return NULL;
+}
+
+static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+	struct rtattr **rta = arg;
+	struct in_device *in_dev;
+	struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
+	struct in_ifaddr *ifa, **ifap;
+
+	ASSERT_RTNL();
+
+	if ((in_dev = inetdev_by_index(ifm->ifa_index)) == NULL)
+		goto out;
+	__in_dev_put(in_dev);
+
+	for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
+	     ifap = &ifa->ifa_next) {
+		if ((rta[IFA_LOCAL - 1] &&
+		     memcmp(RTA_DATA(rta[IFA_LOCAL - 1]),
+			    &ifa->ifa_local, 4)) ||
+		    (rta[IFA_LABEL - 1] &&
+		     rtattr_strcmp(rta[IFA_LABEL - 1], ifa->ifa_label)) ||
+		    (rta[IFA_ADDRESS - 1] &&
+		     (ifm->ifa_prefixlen != ifa->ifa_prefixlen ||
+		      !inet_ifa_match(*(u32*)RTA_DATA(rta[IFA_ADDRESS - 1]),
+			      	      ifa))))
+			continue;
+		inet_del_ifa(in_dev, ifap, 1);
+		return 0;
+	}
+out:
+	return -EADDRNOTAVAIL;
+}
+
+static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+	struct rtattr **rta = arg;
+	struct net_device *dev;
+	struct in_device *in_dev;
+	struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
+	struct in_ifaddr *ifa;
+	int rc = -EINVAL;
+
+	ASSERT_RTNL();
+
+	if (ifm->ifa_prefixlen > 32 || !rta[IFA_LOCAL - 1])
+		goto out;
+
+	rc = -ENODEV;
+	if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
+		goto out;
+
+	rc = -ENOBUFS;
+	if ((in_dev = __in_dev_get(dev)) == NULL) {
+		in_dev = inetdev_init(dev);
+		if (!in_dev)
+			goto out;
+	}
+
+	if ((ifa = inet_alloc_ifa()) == NULL)
+		goto out;
+
+	if (!rta[IFA_ADDRESS - 1])
+		rta[IFA_ADDRESS - 1] = rta[IFA_LOCAL - 1];
+	memcpy(&ifa->ifa_local, RTA_DATA(rta[IFA_LOCAL - 1]), 4);
+	memcpy(&ifa->ifa_address, RTA_DATA(rta[IFA_ADDRESS - 1]), 4);
+	ifa->ifa_prefixlen = ifm->ifa_prefixlen;
+	ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen);
+	if (rta[IFA_BROADCAST - 1])
+		memcpy(&ifa->ifa_broadcast,
+		       RTA_DATA(rta[IFA_BROADCAST - 1]), 4);
+	if (rta[IFA_ANYCAST - 1])
+		memcpy(&ifa->ifa_anycast, RTA_DATA(rta[IFA_ANYCAST - 1]), 4);
+	ifa->ifa_flags = ifm->ifa_flags;
+	ifa->ifa_scope = ifm->ifa_scope;
+	in_dev_hold(in_dev);
+	ifa->ifa_dev   = in_dev;
+	if (rta[IFA_LABEL - 1])
+		rtattr_strlcpy(ifa->ifa_label, rta[IFA_LABEL - 1], IFNAMSIZ);
+	else
+		memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
+
+	rc = inet_insert_ifa(ifa);
+out:
+	return rc;
+}
+
+/*
+ *	Determine a default network mask, based on the IP address.
+ */
+
+static __inline__ int inet_abc_len(u32 addr)
+{
+	int rc = -1;	/* Something else, probably a multicast. */
+
+  	if (ZERONET(addr))
+  		rc = 0;
+	else {
+		addr = ntohl(addr);
+
+		if (IN_CLASSA(addr))
+			rc = 8;
+		else if (IN_CLASSB(addr))
+			rc = 16;
+		else if (IN_CLASSC(addr))
+			rc = 24;
+	}
+
+  	return rc;
+}
+
+
+int devinet_ioctl(unsigned int cmd, void __user *arg)
+{
+	struct ifreq ifr;
+	struct sockaddr_in sin_orig;
+	struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr;
+	struct in_device *in_dev;
+	struct in_ifaddr **ifap = NULL;
+	struct in_ifaddr *ifa = NULL;
+	struct net_device *dev;
+	char *colon;
+	int ret = -EFAULT;
+	int tryaddrmatch = 0;
+
+	/*
+	 *	Fetch the caller's info block into kernel space
+	 */
+
+	if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
+		goto out;
+	ifr.ifr_name[IFNAMSIZ - 1] = 0;
+
+	/* save original address for comparison */
+	memcpy(&sin_orig, sin, sizeof(*sin));
+
+	colon = strchr(ifr.ifr_name, ':');
+	if (colon)
+		*colon = 0;
+
+#ifdef CONFIG_KMOD
+	dev_load(ifr.ifr_name);
+#endif
+
+	switch(cmd) {
+	case SIOCGIFADDR:	/* Get interface address */
+	case SIOCGIFBRDADDR:	/* Get the broadcast address */
+	case SIOCGIFDSTADDR:	/* Get the destination address */
+	case SIOCGIFNETMASK:	/* Get the netmask for the interface */
+		/* Note that these ioctls will not sleep,
+		   so that we do not impose a lock.
+		   One day we will be forced to put shlock here (I mean SMP)
+		 */
+		tryaddrmatch = (sin_orig.sin_family == AF_INET);
+		memset(sin, 0, sizeof(*sin));
+		sin->sin_family = AF_INET;
+		break;
+
+	case SIOCSIFFLAGS:
+		ret = -EACCES;
+		if (!capable(CAP_NET_ADMIN))
+			goto out;
+		break;
+	case SIOCSIFADDR:	/* Set interface address (and family) */
+	case SIOCSIFBRDADDR:	/* Set the broadcast address */
+	case SIOCSIFDSTADDR:	/* Set the destination address */
+	case SIOCSIFNETMASK: 	/* Set the netmask for the interface */
+		ret = -EACCES;
+		if (!capable(CAP_NET_ADMIN))
+			goto out;
+		ret = -EINVAL;
+		if (sin->sin_family != AF_INET)
+			goto out;
+		break;
+	default:
+		ret = -EINVAL;
+		goto out;
+	}
+
+	rtnl_lock();
+
+	ret = -ENODEV;
+	if ((dev = __dev_get_by_name(ifr.ifr_name)) == NULL)
+		goto done;
+
+	if (colon)
+		*colon = ':';
+
+	if ((in_dev = __in_dev_get(dev)) != NULL) {
+		if (tryaddrmatch) {
+			/* Matthias Andree */
+			/* compare label and address (4.4BSD style) */
+			/* note: we only do this for a limited set of ioctls
+			   and only if the original address family was AF_INET.
+			   This is checked above. */
+			for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
+			     ifap = &ifa->ifa_next) {
+				if (!strcmp(ifr.ifr_name, ifa->ifa_label) &&
+				    sin_orig.sin_addr.s_addr ==
+							ifa->ifa_address) {
+					break; /* found */
+				}
+			}
+		}
+		/* we didn't get a match, maybe the application is
+		   4.3BSD-style and passed in junk so we fall back to
+		   comparing just the label */
+		if (!ifa) {
+			for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
+			     ifap = &ifa->ifa_next)
+				if (!strcmp(ifr.ifr_name, ifa->ifa_label))
+					break;
+		}
+	}
+
+	ret = -EADDRNOTAVAIL;
+	if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS)
+		goto done;
+
+	switch(cmd) {
+	case SIOCGIFADDR:	/* Get interface address */
+		sin->sin_addr.s_addr = ifa->ifa_local;
+		goto rarok;
+
+	case SIOCGIFBRDADDR:	/* Get the broadcast address */
+		sin->sin_addr.s_addr = ifa->ifa_broadcast;
+		goto rarok;
+
+	case SIOCGIFDSTADDR:	/* Get the destination address */
+		sin->sin_addr.s_addr = ifa->ifa_address;
+		goto rarok;
+
+	case SIOCGIFNETMASK:	/* Get the netmask for the interface */
+		sin->sin_addr.s_addr = ifa->ifa_mask;
+		goto rarok;
+
+	case SIOCSIFFLAGS:
+		if (colon) {
+			ret = -EADDRNOTAVAIL;
+			if (!ifa)
+				break;
+			ret = 0;
+			if (!(ifr.ifr_flags & IFF_UP))
+				inet_del_ifa(in_dev, ifap, 1);
+			break;
+		}
+		ret = dev_change_flags(dev, ifr.ifr_flags);
+		break;
+
+	case SIOCSIFADDR:	/* Set interface address (and family) */
+		ret = -EINVAL;
+		if (inet_abc_len(sin->sin_addr.s_addr) < 0)
+			break;
+
+		if (!ifa) {
+			ret = -ENOBUFS;
+			if ((ifa = inet_alloc_ifa()) == NULL)
+				break;
+			if (colon)
+				memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ);
+			else
+				memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
+		} else {
+			ret = 0;
+			if (ifa->ifa_local == sin->sin_addr.s_addr)
+				break;
+			inet_del_ifa(in_dev, ifap, 0);
+			ifa->ifa_broadcast = 0;
+			ifa->ifa_anycast = 0;
+		}
+
+		ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr;
+
+		if (!(dev->flags & IFF_POINTOPOINT)) {
+			ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address);
+			ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen);
+			if ((dev->flags & IFF_BROADCAST) &&
+			    ifa->ifa_prefixlen < 31)
+				ifa->ifa_broadcast = ifa->ifa_address |
+						     ~ifa->ifa_mask;
+		} else {
+			ifa->ifa_prefixlen = 32;
+			ifa->ifa_mask = inet_make_mask(32);
+		}
+		ret = inet_set_ifa(dev, ifa);
+		break;
+
+	case SIOCSIFBRDADDR:	/* Set the broadcast address */
+		ret = 0;
+		if (ifa->ifa_broadcast != sin->sin_addr.s_addr) {
+			inet_del_ifa(in_dev, ifap, 0);
+			ifa->ifa_broadcast = sin->sin_addr.s_addr;
+			inet_insert_ifa(ifa);
+		}
+		break;
+
+	case SIOCSIFDSTADDR:	/* Set the destination address */
+		ret = 0;
+		if (ifa->ifa_address == sin->sin_addr.s_addr)
+			break;
+		ret = -EINVAL;
+		if (inet_abc_len(sin->sin_addr.s_addr) < 0)
+			break;
+		ret = 0;
+		inet_del_ifa(in_dev, ifap, 0);
+		ifa->ifa_address = sin->sin_addr.s_addr;
+		inet_insert_ifa(ifa);
+		break;
+
+	case SIOCSIFNETMASK: 	/* Set the netmask for the interface */
+
+		/*
+		 *	The mask we set must be legal.
+		 */
+		ret = -EINVAL;
+		if (bad_mask(sin->sin_addr.s_addr, 0))
+			break;
+		ret = 0;
+		if (ifa->ifa_mask != sin->sin_addr.s_addr) {
+			inet_del_ifa(in_dev, ifap, 0);
+			ifa->ifa_mask = sin->sin_addr.s_addr;
+			ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask);
+
+			/* See if current broadcast address matches
+			 * with current netmask, then recalculate
+			 * the broadcast address. Otherwise it's a
+			 * funny address, so don't touch it since
+			 * the user seems to know what (s)he's doing...
+			 */
+			if ((dev->flags & IFF_BROADCAST) &&
+			    (ifa->ifa_prefixlen < 31) &&
+			    (ifa->ifa_broadcast ==
+			     (ifa->ifa_local|~ifa->ifa_mask))) {
+				ifa->ifa_broadcast = (ifa->ifa_local |
+						      ~sin->sin_addr.s_addr);
+			}
+			inet_insert_ifa(ifa);
+		}
+		break;
+	}
+done:
+	rtnl_unlock();
+out:
+	return ret;
+rarok:
+	rtnl_unlock();
+	ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0;
+	goto out;
+}
+
+static int inet_gifconf(struct net_device *dev, char __user *buf, int len)
+{
+	struct in_device *in_dev = __in_dev_get(dev);
+	struct in_ifaddr *ifa;
+	struct ifreq ifr;
+	int done = 0;
+
+	if (!in_dev || (ifa = in_dev->ifa_list) == NULL)
+		goto out;
+
+	for (; ifa; ifa = ifa->ifa_next) {
+		if (!buf) {
+			done += sizeof(ifr);
+			continue;
+		}
+		if (len < (int) sizeof(ifr))
+			break;
+		memset(&ifr, 0, sizeof(struct ifreq));
+		if (ifa->ifa_label)
+			strcpy(ifr.ifr_name, ifa->ifa_label);
+		else
+			strcpy(ifr.ifr_name, dev->name);
+
+		(*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET;
+		(*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr =
+								ifa->ifa_local;
+
+		if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) {
+			done = -EFAULT;
+			break;
+		}
+		buf  += sizeof(struct ifreq);
+		len  -= sizeof(struct ifreq);
+		done += sizeof(struct ifreq);
+	}
+out:
+	return done;
+}
+
+u32 inet_select_addr(const struct net_device *dev, u32 dst, int scope)
+{
+	u32 addr = 0;
+	struct in_device *in_dev;
+
+	rcu_read_lock();
+	in_dev = __in_dev_get(dev);
+	if (!in_dev)
+		goto no_in_dev;
+
+	for_primary_ifa(in_dev) {
+		if (ifa->ifa_scope > scope)
+			continue;
+		if (!dst || inet_ifa_match(dst, ifa)) {
+			addr = ifa->ifa_local;
+			break;
+		}
+		if (!addr)
+			addr = ifa->ifa_local;
+	} endfor_ifa(in_dev);
+no_in_dev:
+	rcu_read_unlock();
+
+	if (addr)
+		goto out;
+
+	/* Not loopback addresses on loopback should be preferred
+	   in this case. It is importnat that lo is the first interface
+	   in dev_base list.
+	 */
+	read_lock(&dev_base_lock);
+	rcu_read_lock();
+	for (dev = dev_base; dev; dev = dev->next) {
+		if ((in_dev = __in_dev_get(dev)) == NULL)
+			continue;
+
+		for_primary_ifa(in_dev) {
+			if (ifa->ifa_scope != RT_SCOPE_LINK &&
+			    ifa->ifa_scope <= scope) {
+				addr = ifa->ifa_local;
+				goto out_unlock_both;
+			}
+		} endfor_ifa(in_dev);
+	}
+out_unlock_both:
+	read_unlock(&dev_base_lock);
+	rcu_read_unlock();
+out:
+	return addr;
+}
+
+static u32 confirm_addr_indev(struct in_device *in_dev, u32 dst,
+			      u32 local, int scope)
+{
+	int same = 0;
+	u32 addr = 0;
+
+	for_ifa(in_dev) {
+		if (!addr &&
+		    (local == ifa->ifa_local || !local) &&
+		    ifa->ifa_scope <= scope) {
+			addr = ifa->ifa_local;
+			if (same)
+				break;
+		}
+		if (!same) {
+			same = (!local || inet_ifa_match(local, ifa)) &&
+				(!dst || inet_ifa_match(dst, ifa));
+			if (same && addr) {
+				if (local || !dst)
+					break;
+				/* Is the selected addr into dst subnet? */
+				if (inet_ifa_match(addr, ifa))
+					break;
+				/* No, then can we use new local src? */
+				if (ifa->ifa_scope <= scope) {
+					addr = ifa->ifa_local;
+					break;
+				}
+				/* search for large dst subnet for addr */
+				same = 0;
+			}
+		}
+	} endfor_ifa(in_dev);
+
+	return same? addr : 0;
+}
+
+/*
+ * Confirm that local IP address exists using wildcards:
+ * - dev: only on this interface, 0=any interface
+ * - dst: only in the same subnet as dst, 0=any dst
+ * - local: address, 0=autoselect the local address
+ * - scope: maximum allowed scope value for the local address
+ */
+u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scope)
+{
+	u32 addr = 0;
+	struct in_device *in_dev;
+
+	if (dev) {
+		rcu_read_lock();
+		if ((in_dev = __in_dev_get(dev)))
+			addr = confirm_addr_indev(in_dev, dst, local, scope);
+		rcu_read_unlock();
+
+		return addr;
+	}
+
+	read_lock(&dev_base_lock);
+	rcu_read_lock();
+	for (dev = dev_base; dev; dev = dev->next) {
+		if ((in_dev = __in_dev_get(dev))) {
+			addr = confirm_addr_indev(in_dev, dst, local, scope);
+			if (addr)
+				break;
+		}
+	}
+	rcu_read_unlock();
+	read_unlock(&dev_base_lock);
+
+	return addr;
+}
+
+/*
+ *	Device notifier
+ */
+
+int register_inetaddr_notifier(struct notifier_block *nb)
+{
+	return notifier_chain_register(&inetaddr_chain, nb);
+}
+
+int unregister_inetaddr_notifier(struct notifier_block *nb)
+{
+	return notifier_chain_unregister(&inetaddr_chain, nb);
+}
+
+/* Rename ifa_labels for a device name change. Make some effort to preserve existing
+ * alias numbering and to create unique labels if possible.
+*/
+static void inetdev_changename(struct net_device *dev, struct in_device *in_dev)
+{ 
+	struct in_ifaddr *ifa;
+	int named = 0;
+
+	for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { 
+		char old[IFNAMSIZ], *dot; 
+
+		memcpy(old, ifa->ifa_label, IFNAMSIZ);
+		memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); 
+		if (named++ == 0)
+			continue;
+		dot = strchr(ifa->ifa_label, ':');
+		if (dot == NULL) { 
+			sprintf(old, ":%d", named); 
+			dot = old;
+		}
+		if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) { 
+			strcat(ifa->ifa_label, dot); 
+		} else { 
+			strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); 
+		} 
+	}	
+} 
+
+/* Called only under RTNL semaphore */
+
+static int inetdev_event(struct notifier_block *this, unsigned long event,
+			 void *ptr)
+{
+	struct net_device *dev = ptr;
+	struct in_device *in_dev = __in_dev_get(dev);
+
+	ASSERT_RTNL();
+
+	if (!in_dev) {
+		if (event == NETDEV_REGISTER && dev == &loopback_dev) {
+			in_dev = inetdev_init(dev);
+			if (!in_dev)
+				panic("devinet: Failed to create loopback\n");
+			in_dev->cnf.no_xfrm = 1;
+			in_dev->cnf.no_policy = 1;
+		}
+		goto out;
+	}
+
+	switch (event) {
+	case NETDEV_REGISTER:
+		printk(KERN_DEBUG "inetdev_event: bug\n");
+		dev->ip_ptr = NULL;
+		break;
+	case NETDEV_UP:
+		if (dev->mtu < 68)
+			break;
+		if (dev == &loopback_dev) {
+			struct in_ifaddr *ifa;
+			if ((ifa = inet_alloc_ifa()) != NULL) {
+				ifa->ifa_local =
+				  ifa->ifa_address = htonl(INADDR_LOOPBACK);
+				ifa->ifa_prefixlen = 8;
+				ifa->ifa_mask = inet_make_mask(8);
+				in_dev_hold(in_dev);
+				ifa->ifa_dev = in_dev;
+				ifa->ifa_scope = RT_SCOPE_HOST;
+				memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
+				inet_insert_ifa(ifa);
+			}
+		}
+		ip_mc_up(in_dev);
+		break;
+	case NETDEV_DOWN:
+		ip_mc_down(in_dev);
+		break;
+	case NETDEV_CHANGEMTU:
+		if (dev->mtu >= 68)
+			break;
+		/* MTU falled under 68, disable IP */
+	case NETDEV_UNREGISTER:
+		inetdev_destroy(in_dev);
+		break;
+	case NETDEV_CHANGENAME:
+		/* Do not notify about label change, this event is
+		 * not interesting to applications using netlink.
+		 */
+		inetdev_changename(dev, in_dev);
+
+#ifdef CONFIG_SYSCTL
+		devinet_sysctl_unregister(&in_dev->cnf);
+		neigh_sysctl_unregister(in_dev->arp_parms);
+		neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4,
+				      NET_IPV4_NEIGH, "ipv4", NULL, NULL);
+		devinet_sysctl_register(in_dev, &in_dev->cnf);
+#endif
+		break;
+	}
+out:
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block ip_netdev_notifier = {
+	.notifier_call =inetdev_event,
+};
+
+static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa,
+			    u32 pid, u32 seq, int event)
+{
+	struct ifaddrmsg *ifm;
+	struct nlmsghdr  *nlh;
+	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_INET;
+	ifm->ifa_prefixlen = ifa->ifa_prefixlen;
+	ifm->ifa_flags = ifa->ifa_flags|IFA_F_PERMANENT;
+	ifm->ifa_scope = ifa->ifa_scope;
+	ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
+	if (ifa->ifa_address)
+		RTA_PUT(skb, IFA_ADDRESS, 4, &ifa->ifa_address);
+	if (ifa->ifa_local)
+		RTA_PUT(skb, IFA_LOCAL, 4, &ifa->ifa_local);
+	if (ifa->ifa_broadcast)
+		RTA_PUT(skb, IFA_BROADCAST, 4, &ifa->ifa_broadcast);
+	if (ifa->ifa_anycast)
+		RTA_PUT(skb, IFA_ANYCAST, 4, &ifa->ifa_anycast);
+	if (ifa->ifa_label[0])
+		RTA_PUT(skb, IFA_LABEL, IFNAMSIZ, &ifa->ifa_label);
+	nlh->nlmsg_len = skb->tail - b;
+	return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+	skb_trim(skb, b - skb->data);
+	return -1;
+}
+
+static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	int idx, ip_idx;
+	struct net_device *dev;
+	struct in_device *in_dev;
+	struct in_ifaddr *ifa;
+	int s_ip_idx, 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;
+		rcu_read_lock();
+		if ((in_dev = __in_dev_get(dev)) == NULL) {
+			rcu_read_unlock();
+			continue;
+		}
+
+		for (ifa = in_dev->ifa_list, ip_idx = 0; ifa;
+		     ifa = ifa->ifa_next, ip_idx++) {
+			if (ip_idx < s_ip_idx)
+				continue;
+			if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
+					     cb->nlh->nlmsg_seq,
+					     RTM_NEWADDR) <= 0) {
+				rcu_read_unlock();
+				goto done;
+			}
+		}
+		rcu_read_unlock();
+	}
+
+done:
+	read_unlock(&dev_base_lock);
+	cb->args[0] = idx;
+	cb->args[1] = ip_idx;
+
+	return skb->len;
+}
+
+static void rtmsg_ifa(int event, struct in_ifaddr* ifa)
+{
+	int size = NLMSG_SPACE(sizeof(struct ifaddrmsg) + 128);
+	struct sk_buff *skb = alloc_skb(size, GFP_KERNEL);
+
+	if (!skb)
+		netlink_set_err(rtnl, 0, RTMGRP_IPV4_IFADDR, ENOBUFS);
+	else if (inet_fill_ifaddr(skb, ifa, 0, 0, event) < 0) {
+		kfree_skb(skb);
+		netlink_set_err(rtnl, 0, RTMGRP_IPV4_IFADDR, EINVAL);
+	} else {
+		NETLINK_CB(skb).dst_groups = RTMGRP_IPV4_IFADDR;
+		netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV4_IFADDR, GFP_KERNEL);
+	}
+}
+
+static struct rtnetlink_link inet_rtnetlink_table[RTM_MAX - RTM_BASE + 1] = {
+	 [4] = { .doit	 = inet_rtm_newaddr,  },
+	 [5] = { .doit	 = inet_rtm_deladdr,  },
+	 [6] = { .dumpit = inet_dump_ifaddr,  },
+	 [8] = { .doit	 = inet_rtm_newroute, },
+	 [9] = { .doit	 = inet_rtm_delroute, },
+	[10] = { .doit	 = inet_rtm_getroute, .dumpit = inet_dump_fib, },
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+	[16] = { .doit	 = inet_rtm_newrule, },
+	[17] = { .doit	 = inet_rtm_delrule, },
+	[18] = { .dumpit = inet_dump_rules,  },
+#endif
+};
+
+#ifdef CONFIG_SYSCTL
+
+void inet_forward_change(void)
+{
+	struct net_device *dev;
+	int on = ipv4_devconf.forwarding;
+
+	ipv4_devconf.accept_redirects = !on;
+	ipv4_devconf_dflt.forwarding = on;
+
+	read_lock(&dev_base_lock);
+	for (dev = dev_base; dev; dev = dev->next) {
+		struct in_device *in_dev;
+		rcu_read_lock();
+		in_dev = __in_dev_get(dev);
+		if (in_dev)
+			in_dev->cnf.forwarding = on;
+		rcu_read_unlock();
+	}
+	read_unlock(&dev_base_lock);
+
+	rt_cache_flush(0);
+}
+
+static int devinet_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 = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+
+	if (write && *valp != val) {
+		if (valp == &ipv4_devconf.forwarding)
+			inet_forward_change();
+		else if (valp != &ipv4_devconf_dflt.forwarding)
+			rt_cache_flush(0);
+	}
+
+	return ret;
+}
+
+int ipv4_doint_and_flush(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 = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+
+	if (write && *valp != val)
+		rt_cache_flush(0);
+
+	return ret;
+}
+
+int ipv4_doint_and_flush_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;
+		}
+	}
+
+	*valp = new;
+	rt_cache_flush(0);
+	return 1;
+}
+
+
+static struct devinet_sysctl_table {
+	struct ctl_table_header *sysctl_header;
+	ctl_table		devinet_vars[__NET_IPV4_CONF_MAX];
+	ctl_table		devinet_dev[2];
+	ctl_table		devinet_conf_dir[2];
+	ctl_table		devinet_proto_dir[2];
+	ctl_table		devinet_root_dir[2];
+} devinet_sysctl = {
+	.devinet_vars = {
+		{
+			.ctl_name	= NET_IPV4_CONF_FORWARDING,
+			.procname	= "forwarding",
+			.data		= &ipv4_devconf.forwarding,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &devinet_sysctl_forward,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_MC_FORWARDING,
+			.procname	= "mc_forwarding",
+			.data		= &ipv4_devconf.mc_forwarding,
+			.maxlen		= sizeof(int),
+			.mode		= 0444,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_ACCEPT_REDIRECTS,
+			.procname	= "accept_redirects",
+			.data		= &ipv4_devconf.accept_redirects,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_SECURE_REDIRECTS,
+			.procname	= "secure_redirects",
+			.data		= &ipv4_devconf.secure_redirects,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_SHARED_MEDIA,
+			.procname	= "shared_media",
+			.data		= &ipv4_devconf.shared_media,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_RP_FILTER,
+			.procname	= "rp_filter",
+			.data		= &ipv4_devconf.rp_filter,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_SEND_REDIRECTS,
+			.procname	= "send_redirects",
+			.data		= &ipv4_devconf.send_redirects,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE,
+			.procname	= "accept_source_route",
+			.data		= &ipv4_devconf.accept_source_route,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_PROXY_ARP,
+			.procname	= "proxy_arp",
+			.data		= &ipv4_devconf.proxy_arp,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_MEDIUM_ID,
+			.procname	= "medium_id",
+			.data		= &ipv4_devconf.medium_id,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_BOOTP_RELAY,
+			.procname	= "bootp_relay",
+			.data		= &ipv4_devconf.bootp_relay,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_LOG_MARTIANS,
+			.procname	= "log_martians",
+			.data		= &ipv4_devconf.log_martians,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_TAG,
+			.procname	= "tag",
+			.data		= &ipv4_devconf.tag,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_ARPFILTER,
+			.procname	= "arp_filter",
+			.data		= &ipv4_devconf.arp_filter,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_ARP_ANNOUNCE,
+			.procname	= "arp_announce",
+			.data		= &ipv4_devconf.arp_announce,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_ARP_IGNORE,
+			.procname	= "arp_ignore",
+			.data		= &ipv4_devconf.arp_ignore,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_NOXFRM,
+			.procname	= "disable_xfrm",
+			.data		= &ipv4_devconf.no_xfrm,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &ipv4_doint_and_flush,
+			.strategy	= &ipv4_doint_and_flush_strategy,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_NOPOLICY,
+			.procname	= "disable_policy",
+			.data		= &ipv4_devconf.no_policy,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &ipv4_doint_and_flush,
+			.strategy	= &ipv4_doint_and_flush_strategy,
+		},
+		{
+			.ctl_name	= NET_IPV4_CONF_FORCE_IGMP_VERSION,
+			.procname	= "force_igmp_version",
+			.data		= &ipv4_devconf.force_igmp_version,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &ipv4_doint_and_flush,
+			.strategy	= &ipv4_doint_and_flush_strategy,
+		},
+	},
+	.devinet_dev = {
+		{
+			.ctl_name	= NET_PROTO_CONF_ALL,
+			.procname	= "all",
+			.mode		= 0555,
+			.child		= devinet_sysctl.devinet_vars,
+		},
+	},
+	.devinet_conf_dir = {
+	        {
+			.ctl_name	= NET_IPV4_CONF,
+			.procname	= "conf",
+			.mode		= 0555,
+			.child		= devinet_sysctl.devinet_dev,
+		},
+	},
+	.devinet_proto_dir = {
+		{
+			.ctl_name	= NET_IPV4,
+			.procname	= "ipv4",
+			.mode		= 0555,
+			.child 		= devinet_sysctl.devinet_conf_dir,
+		},
+	},
+	.devinet_root_dir = {
+		{
+			.ctl_name	= CTL_NET,
+			.procname 	= "net",
+			.mode		= 0555,
+			.child		= devinet_sysctl.devinet_proto_dir,
+		},
+	},
+};
+
+static void devinet_sysctl_register(struct in_device *in_dev,
+				    struct ipv4_devconf *p)
+{
+	int i;
+	struct net_device *dev = in_dev ? in_dev->dev : NULL;
+	struct devinet_sysctl_table *t = kmalloc(sizeof(*t), GFP_KERNEL);
+	char *dev_name = NULL;
+
+	if (!t)
+		return;
+	memcpy(t, &devinet_sysctl, sizeof(*t));
+	for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) {
+		t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf;
+		t->devinet_vars[i].de = NULL;
+	}
+
+	if (dev) {
+		dev_name = dev->name; 
+		t->devinet_dev[0].ctl_name = dev->ifindex;
+	} else {
+		dev_name = "default";
+		t->devinet_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->devinet_dev[0].procname    = dev_name;
+	t->devinet_dev[0].child	      = t->devinet_vars;
+	t->devinet_dev[0].de	      = NULL;
+	t->devinet_conf_dir[0].child  = t->devinet_dev;
+	t->devinet_conf_dir[0].de     = NULL;
+	t->devinet_proto_dir[0].child = t->devinet_conf_dir;
+	t->devinet_proto_dir[0].de    = NULL;
+	t->devinet_root_dir[0].child  = t->devinet_proto_dir;
+	t->devinet_root_dir[0].de     = NULL;
+
+	t->sysctl_header = register_sysctl_table(t->devinet_root_dir, 0);
+	if (!t->sysctl_header)
+	    goto free_procname;
+
+	p->sysctl = t;
+	return;
+
+	/* error path */
+ free_procname:
+	kfree(dev_name);
+ free:
+	kfree(t);
+	return;
+}
+
+static void devinet_sysctl_unregister(struct ipv4_devconf *p)
+{
+	if (p->sysctl) {
+		struct devinet_sysctl_table *t = p->sysctl;
+		p->sysctl = NULL;
+		unregister_sysctl_table(t->sysctl_header);
+		kfree(t->devinet_dev[0].procname);
+		kfree(t);
+	}
+}
+#endif
+
+void __init devinet_init(void)
+{
+	register_gifconf(PF_INET, inet_gifconf);
+	register_netdevice_notifier(&ip_netdev_notifier);
+	rtnetlink_links[PF_INET] = inet_rtnetlink_table;
+#ifdef CONFIG_SYSCTL
+	devinet_sysctl.sysctl_header =
+		register_sysctl_table(devinet_sysctl.devinet_root_dir, 0);
+	devinet_sysctl_register(NULL, &ipv4_devconf_dflt);
+#endif
+}
+
+EXPORT_SYMBOL(devinet_ioctl);
+EXPORT_SYMBOL(in_dev_finish_destroy);
+EXPORT_SYMBOL(inet_select_addr);
+EXPORT_SYMBOL(inetdev_by_index);
+EXPORT_SYMBOL(register_inetaddr_notifier);
+EXPORT_SYMBOL(unregister_inetaddr_notifier);