#ifndef _NF_INTERNALS_H
  #define _NF_INTERNALS_H

  #include <linux/list.h>
  #include <linux/skbuff.h>
  #include <linux/netdevice.h>
  
  #ifdef CONFIG_NETFILTER_DEBUG

  #define NFDEBUG(format, args...)  printk(KERN_DEBUG format , ## args)

  #else
  #define NFDEBUG(format, args...)
  #endif
  
  
  /* core.c */
  extern unsigned int nf_iterate(struct list_head *head,

  				struct sk_buff *skb,

  				unsigned int hook,

  				const struct net_device *indev,
  				const struct net_device *outdev,
  				struct list_head **i,
  				int (*okfn)(struct sk_buff *),
  				int hook_thresh);
  
  /* nf_queue.c */

  extern int nf_queue(struct sk_buff *skb,

  		    struct list_head *elem,

  		    u_int8_t pf, unsigned int hook,

  		    struct net_device *indev,
  		    struct net_device *outdev,
  		    int (*okfn)(struct sk_buff *),
  		    unsigned int queuenum);
  extern int __init netfilter_queue_init(void);
  
  /* nf_log.c */
  extern int __init netfilter_log_init(void);
  
  #endif