--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/inetdevice.h	Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,224 @@
+#ifndef _LINUX_INETDEVICE_H
+#define _LINUX_INETDEVICE_H
+
+#ifdef __KERNEL__
+
+#include <linux/bitmap.h>
+#include <linux/if.h>
+#include <linux/netdevice.h>
+#include <linux/rcupdate.h>
+#include <linux/timer.h>
+#include <linux/sysctl.h>
+
+struct ipv4_devconf
+{
+	void	*sysctl;
+	int	data[__NET_IPV4_CONF_MAX - 1];
+	DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1);
+};
+
+struct in_device
+{
+	struct net_device	*dev;
+	atomic_t		refcnt;
+	int			dead;
+	struct in_ifaddr	*ifa_list;	/* IP ifaddr chain		*/
+	rwlock_t		mc_list_lock;
+	struct ip_mc_list	*mc_list;	/* IP multicast filter chain    */
+	int			mc_count;	          /* Number of installed mcasts	*/
+	spinlock_t		mc_tomb_lock;
+	struct ip_mc_list	*mc_tomb;
+	unsigned long		mr_v1_seen;
+	unsigned long		mr_v2_seen;
+	unsigned long		mr_maxdelay;
+	unsigned char		mr_qrv;
+	unsigned char		mr_gq_running;
+	unsigned char		mr_ifc_count;
+	struct timer_list	mr_gq_timer;	/* general query timer */
+	struct timer_list	mr_ifc_timer;	/* interface change timer */
+
+	struct neigh_parms	*arp_parms;
+	struct ipv4_devconf	cnf;
+	struct rcu_head		rcu_head;
+};
+
+#define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1])
+#define IPV4_DEVCONF_ALL(net, attr) \
+	IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
+
+static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
+{
+	index--;
+	return in_dev->cnf.data[index];
+}
+
+static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
+				    int val)
+{
+	index--;
+	set_bit(index, in_dev->cnf.state);
+	in_dev->cnf.data[index] = val;
+}
+
+static inline void ipv4_devconf_setall(struct in_device *in_dev)
+{
+	bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1);
+}
+
+#define IN_DEV_CONF_GET(in_dev, attr) \
+	ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr)
+#define IN_DEV_CONF_SET(in_dev, attr, val) \
+	ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val))
+
+#define IN_DEV_ANDCONF(in_dev, attr) \
+	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
+	 IN_DEV_CONF_GET((in_dev), attr))
+#define IN_DEV_ORCONF(in_dev, attr) \
+	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
+	 IN_DEV_CONF_GET((in_dev), attr))
+#define IN_DEV_MAXCONF(in_dev, attr) \
+	(max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
+	     IN_DEV_CONF_GET((in_dev), attr)))
+
+#define IN_DEV_FORWARD(in_dev)		IN_DEV_CONF_GET((in_dev), FORWARDING)
+#define IN_DEV_MFORWARD(in_dev)		IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
+#define IN_DEV_RPFILTER(in_dev)		IN_DEV_ANDCONF((in_dev), RP_FILTER)
+#define IN_DEV_SOURCE_ROUTE(in_dev)	IN_DEV_ANDCONF((in_dev), \
+						       ACCEPT_SOURCE_ROUTE)
+#define IN_DEV_BOOTP_RELAY(in_dev)	IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
+
+#define IN_DEV_LOG_MARTIANS(in_dev)	IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
+#define IN_DEV_PROXY_ARP(in_dev)	IN_DEV_ORCONF((in_dev), PROXY_ARP)
+#define IN_DEV_SHARED_MEDIA(in_dev)	IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
+#define IN_DEV_TX_REDIRECTS(in_dev)	IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
+#define IN_DEV_SEC_REDIRECTS(in_dev)	IN_DEV_ORCONF((in_dev), \
+						      SECURE_REDIRECTS)
+#define IN_DEV_IDTAG(in_dev)		IN_DEV_CONF_GET(in_dev, TAG)
+#define IN_DEV_MEDIUM_ID(in_dev)	IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
+#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
+					IN_DEV_ORCONF((in_dev), \
+						      PROMOTE_SECONDARIES)
+
+#define IN_DEV_RX_REDIRECTS(in_dev) \
+	((IN_DEV_FORWARD(in_dev) && \
+	  IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
+	 || (!IN_DEV_FORWARD(in_dev) && \
+	  IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
+
+#define IN_DEV_ARPFILTER(in_dev)	IN_DEV_ORCONF((in_dev), ARPFILTER)
+#define IN_DEV_ARP_ANNOUNCE(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
+#define IN_DEV_ARP_IGNORE(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
+
+struct in_ifaddr
+{
+	struct in_ifaddr	*ifa_next;
+	struct in_device	*ifa_dev;
+	struct rcu_head		rcu_head;
+	__be32			ifa_local;
+	__be32			ifa_address;
+	__be32			ifa_mask;
+	__be32			ifa_broadcast;
+	unsigned char		ifa_scope;
+	unsigned char		ifa_flags;
+	unsigned char		ifa_prefixlen;
+	char			ifa_label[IFNAMSIZ];
+};
+
+extern int register_inetaddr_notifier(struct notifier_block *nb);
+extern int unregister_inetaddr_notifier(struct notifier_block *nb);
+
+extern struct net_device *ip_dev_find(struct net *net, __be32 addr);
+extern int		inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
+extern int		devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
+extern void		devinet_init(void);
+extern struct in_device	*inetdev_by_index(struct net *, int);
+extern __be32		inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
+extern __be32		inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
+extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
+
+static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
+{
+	return !((addr^ifa->ifa_address)&ifa->ifa_mask);
+}
+
+/*
+ *	Check if a mask is acceptable.
+ */
+ 
+static __inline__ int bad_mask(__be32 mask, __be32 addr)
+{
+	__u32 hmask;
+	if (addr & (mask = ~mask))
+		return 1;
+	hmask = ntohl(mask);
+	if (hmask & (hmask+1))
+		return 1;
+	return 0;
+}
+
+#define for_primary_ifa(in_dev)	{ struct in_ifaddr *ifa; \
+  for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
+
+#define for_ifa(in_dev)	{ struct in_ifaddr *ifa; \
+  for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
+
+
+#define endfor_ifa(in_dev) }
+
+static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
+{
+	struct in_device *in_dev = dev->ip_ptr;
+	if (in_dev)
+		in_dev = rcu_dereference(in_dev);
+	return in_dev;
+}
+
+static __inline__ struct in_device *
+in_dev_get(const struct net_device *dev)
+{
+	struct in_device *in_dev;
+
+	rcu_read_lock();
+	in_dev = __in_dev_get_rcu(dev);
+	if (in_dev)
+		atomic_inc(&in_dev->refcnt);
+	rcu_read_unlock();
+	return in_dev;
+}
+
+static __inline__ struct in_device *
+__in_dev_get_rtnl(const struct net_device *dev)
+{
+	return (struct in_device*)dev->ip_ptr;
+}
+
+extern void in_dev_finish_destroy(struct in_device *idev);
+
+static inline void in_dev_put(struct in_device *idev)
+{
+	if (atomic_dec_and_test(&idev->refcnt))
+		in_dev_finish_destroy(idev);
+}
+
+#define __in_dev_put(idev)  atomic_dec(&(idev)->refcnt)
+#define in_dev_hold(idev)   atomic_inc(&(idev)->refcnt)
+
+#endif /* __KERNEL__ */
+
+static __inline__ __be32 inet_make_mask(int logmask)
+{
+	if (logmask)
+		return htonl(~((1<<(32-logmask))-1));
+	return 0;
+}
+
+static __inline__ int inet_mask_len(__be32 mask)
+{
+	__u32 hmask = ntohl(mask);
+	if (!hmask)
+		return 0;
+	return 32 - ffz(~hmask);
+}
+
+
+#endif /* _LINUX_INETDEVICE_H */