'\" t
.\"     Title: skb_checksum_trimmed
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Linux Networking
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SKB_CHECKSUM_TRIMMED" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Linux Networking"
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.SH "NAME"
skb_checksum_trimmed \- validate checksum of an skb
.SH "SYNOPSIS"
.HP \w'struct\ sk_buff\ *\ skb_checksum_trimmed('u
.BI "struct sk_buff * skb_checksum_trimmed(struct\ sk_buff\ *\ " "skb" ", unsigned\ int\ " "transport_len" ", __sum16(*" "skb_chkf" ")\ (struct\ sk_buff\ *skb));"
.SH "ARGUMENTS"
.PP
\fIskb\fR
.RS 4
the skb to check
.RE
.PP
\fItransport_len\fR
.RS 4
the data length beyond the network header
.RE
.PP
\fIskb_chkf\fR
.RS 4
checksum function to use
.RE
.SH "DESCRIPTION"
.PP
Applies the given checksum function skb_chkf to the provided skb\&. Returns a checked and maybe trimmed skb\&. Returns NULL on error\&.
.PP
If the skb has data beyond the given transport length, then a trimmed & cloned skb is checked and returned\&.
.PP
Caller needs to set the skb transport header and free any returned skb if it differs from the provided skb\&.
.SH "COPYRIGHT"
.br