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#ifndef _NAT_H_ 
#define _NAT_H_ 
 
enum ip_nat_manip_type 
{ 
	IP_NAT_MANIP_SRC, 
	IP_NAT_MANIP_DST 
}; 
 
#define IP_NAT_RANGE_MAP_IPS			1 
#define IP_NAT_RANGE_PROTO_SPECIFIED	2 
#define IP_NAT_RANGE_FULL				4 
 
struct ip_nat_range 
{ 
	unsigned int					flags; 
	unsigned long					min_ip, max_ip; 
	union ip_conntrack_manip_proto	min, max; 
}; 
 
struct ip_nat_multi_range 
{ 
	unsigned int		rangesize; 
	struct ip_nat_range range[1]; 
}; 
 
/* 
 * In Linux 2.4, static timers have been removed from the kernel. 
 * Timers may be dynamically created and destroyed, and should be initialized 
 * by a call to init_timer() upon creation. 
 * 
 * The "data" field enables use of a common timeout function for several timeouts. 
 * You can use this field to distinguish between the different invocations. 
 */ 
struct timer_list  
{ 
	struct list_head	list; 
	long				expires; 
	unsigned long		data; 
	void				(*function)(unsigned long); 
}; 
 
struct ip_nat_hash 
{ 
	struct list_head	list; 
	struct ip_conntrack *conntrack; 
}; 
 
int del_timer(struct timer_list * list); 
int add_timer(struct timer_list * list); 
 
#endif