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.TH "__PSKB_PULL_TAIL" 9 "August 2005" "Kernel Hackers Manual" "LINUX"
.SH NAME
__pskb_pull_tail \- advance tail of skb header
.SH "SYNOPSIS"
.ad l
.hy 0
.HP 38
unsigned\ char\ *\ \fB__pskb_pull_tail\ \fR\ (struct\ sk_buff\ *\ \fIskb\fR, int\ \fIdelta\fR);
.ad
.hy

.SH "ARGUMENTS"

.TP
\fIskb\fR
buffer to reallocate

.TP
\fIdelta\fR
number of bytes to advance tail

.SH "DESCRIPTION"

.PP
The function makes a sense only on a fragmented &sk_buff, it expands header moving its tail forward and copying necessary data from fragmented part\&.

.PP
&sk_buff MUST have reference count of 1\&.

.PP
Returns \fBNULL\fR (and &sk_buff does not change) if pull failed or value of new tail of skb in the case of success\&.

.PP
All the pointers pointing into skb header may change and must be reloaded after call to this function\&.