skb_buff

skbuff的结构图如下

二.Basic functions for sk_buff

  

skb_headroom(), skb_tailroom() Prototype / Description int skb_headroom(const struct sk_buff *skb); bytes at buffer head int skb_tailroom(const struct sk_buff *skb); bytes at buffer Image skb_reserve() Prototype void skb_reserve(struct sk_buff *skb, unsigned int len); Description adjust headroom Image skb_push() Prototype unsigned char *skb_push(struct sk_buff *skb, unsigned int len); Description add data to the start of a buffer Image skb_pull() Prototype unsigned char *skb_pull(struct sk_buff *skb, unsigned int len); Description remove data from the start of a buffer Image skb_put() Prototype unsigned char *skb_put(struct sk_buff *skb, unsigned int len); Description add data to a buffer Image skb_trim() Prototype void skb_trim(struct sk_buff *skb, unsigned int len); Description remove end from a buffer Image 三.List of sk_buff    Prototype / Description __u32 skb_queue_len(const struct sk_buff_head *list_); get queue length struct sk_buff *skb_peek(struct sk_buff_head *list); get pointer to the head element struct sk_buff *skb_peek_tail(struct sk_buff_head *list); get pointer to the tail elementImage   skb_queue_head()    Prototype      void skb_queue_head(struct sk_buff_head *list, struct sk_buff *newsk);      Description    queue a buffer at the list head   Image skb_queue_tail()     Prototype         void skb_queue_tail(struct sk_buff_head *list, struct sk_buff *newsk);    Description queue a buffer at the list ta

   Image

skb_dequeue() Prototype struct sk_buff *skb_dequeue(struct sk_buff_head *list); Description remove from the head of the queue Image skb_dequeue_tail() Prototype struct sk_buff *skb_dequeue_tail(struct sk_buff_head *list); Description remove from the tail of the queue Image skb_insert() Prototype void skb_insert(struct sk_buff *old, struct sk_buff *newsk); Description insert a buffer Image

skb_append() Prototype void skb_append(struct sk_buff *old, struct sk_buff *newsk); Description append a buffer Image skb_unlink() Prototype   void skb_unlink(struct sk_buff *skb); Description   remove a buffer from a list Image