SKB_PEEK

Section: Networking Functions (9)
Updated: November 24, 1997
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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
LinuxReviews : manual page archive : man9