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skb_peek (9)
  • >> skb_peek (9) ( Linux man: Ядро )
  •  

    NAME

    skb_peek - peek an sk_buff
     
    

    SYNOPSIS

    #include <linux/skbuff.h>
    struct sk_buff *skb_peek(struct sk_buff_head *list_);
     

    DESCRIPTION

    The skb_peek function extracts the head element of list_, without modifying list_. It is important to note that this is not necessarily a safe operation, as list_ maintains the original sk_buff, and other operations on list_ may effect it. To be safe, either disable interrupts using cli(9), call skb_peek, copy the data necessary to continue, and re-enable interrupts using sti(9), or use skb_dequeue(9).  

    RETURN VALUE

    Returns a pointer to sk_buff if there is a next element on the list_. Otherwise, returns NULL.  

    AVAILABILITY

    Linux 1.0+  

    SEE ALSO

    intro(9), skb_unlink(9), skb_dequeue(9)

    /usr/src/linux/net/appletalk/ddp.c /usr/src/linux/net/core/datagram.c /usr/src/linux/net/ipv4/tcp.c /usr/src/linux/net/ipv4/udp.c /usr/src/linux/net/unix/af_unix.c  

    AUTHOR

    Cyrus Durgin <cider@speakeasy.org>


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    AVAILABILITY
    SEE ALSO
    AUTHOR


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