'\" t
.\"     Title: eth_type_trans
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: June 2017
.\"    Manual: Network device support
.\"    Source: Kernel Hackers Manual 4.11.3
.\"  Language: English
.\"
.TH "ETH_TYPE_TRANS" "9" "June 2017" "Kernel Hackers Manual 4\&.11\&" "Network device support"
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.\" * Define some portability stuff
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.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
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.nh
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.SH "NAME"
eth_type_trans \- determine the packet\*(Aqs protocol ID\&.
.SH "SYNOPSIS"
.HP \w'__be16\ eth_type_trans('u
.BI "__be16 eth_type_trans(struct\ sk_buff\ *\ " "skb" ", struct\ net_device\ *\ " "dev" ");"
.SH "ARGUMENTS"
.PP
\fIstruct sk_buff * skb\fR
.RS 4
received socket data
.RE
.PP
\fIstruct net_device * dev\fR
.RS 4
receiving network device
.RE
.SH "DESCRIPTION"
.PP
The rule here is that we assume 802\&.3 if the type field is short enough to be a length\&. This is normal practice and works for any \*(Aqnow in use\*(Aq protocol\&.
.SH "COPYRIGHT"
.br