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#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);

};

extern struct ipv4_devconf ipv4_devconf;

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    */

        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(attr) IPV4_DEVCONF(ipv4_devconf, 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(attr) && IN_DEV_CONF_GET((in_dev), attr))

#define IN_DEV_ORCONF(in_dev, attr) \

        (IPV4_DEVCONF_ALL(attr) || IN_DEV_CONF_GET((in_dev), attr))

#define IN_DEV_MAXCONF(in_dev, attr) \

        (max(IPV4_DEVCONF_ALL(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)         (IPV4_DEVCONF_ALL(MC_FORWARDING) && \

                                         IPV4_DEVCONF((in_dev)->cnf, \

                                                      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;

        __be32                  ifa_anycast;

        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(__be32 addr);

extern int              inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);

extern int              devinet_ioctl(unsigned int cmd, void __user *);

extern void             devinet_init(void);

extern struct in_device *inetdev_by_index(int);

extern __be32           inet_select_addr(const struct net_device *dev, __be32 dst, int scope);

extern __be32           inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local, int scope);

extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);

extern void             inet_forward_change(void);

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 */