SKB_PEEK(9) Networking Functions SKB_PEEK(9)NAMEskb_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 modi‐
fying 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 inter‐
rupts 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 ALSOintro(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>
Linux DDI November 24, 1997 SKB_PEEK(9)