129 struct sk_buff {  struct
131 	struct sk_buff	* next;			/* Next buffer in list 				*/  argument
132 	struct sk_buff	* prev;			/* Previous buffer in list 			*/  argument
134 	struct sk_buff_head * list;		/* List we are on				*/  argument
135 	struct sock	*sk;			/* Socket we are owned by 			*/
136 	struct timeval	stamp;			/* Time we arrived				*/
137 	struct net_device	*dev;		/* Device we arrived on/are leaving by		*/
138 	struct net_device	*real_dev;	/* For support of point to point protocols 
145 	{
153 	} h;
157 	{
163 	} nh;
167 	{	
170 	} mac;
172 	struct  dst_entry *dst;
200 	void 		(*destructor)(struct sk_buff *);	/* Destruct function		*/  argument
203         unsigned long	nfmark;
205 	__u32		nfcache;
207 	struct nf_ct_info *nfct;
232 extern void			__kfree_skb(struct sk_buff *skb);  argument