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