1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>Chapter&#160;4.&#160;Utility functions</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The 802.11 subsystems &#8211; for kernel developers"><link rel="up" href="cfg80211-developers-guide.html" title="The cfg80211 subsystem"><link rel="prev" href="API-ieee80211-bss-get-ie.html" title="ieee80211_bss_get_ie"><link rel="next" href="API-ieee80211-channel-to-frequency.html" title="ieee80211_channel_to_frequency"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter&#160;4.&#160;Utility functions</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-ieee80211-bss-get-ie.html">Prev</a>&#160;</td><th width="60%" align="center">The cfg80211 subsystem</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-ieee80211-channel-to-frequency.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp1113074812"></a>Chapter&#160;4.&#160;Utility functions</h1></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="refentrytitle"><a href="API-ieee80211-channel-to-frequency.html"><span class="phrase">ieee80211_channel_to_frequency</span></a></span><span class="refpurpose"> &#8212; 
2  convert channel number to frequency
3 </span></dt><dt><span class="refentrytitle"><a href="API-ieee80211-frequency-to-channel.html"><span class="phrase">ieee80211_frequency_to_channel</span></a></span><span class="refpurpose"> &#8212; 
4  convert frequency to channel number
5 </span></dt><dt><span class="refentrytitle"><a href="API-ieee80211-get-channel.html"><span class="phrase">ieee80211_get_channel</span></a></span><span class="refpurpose"> &#8212; 
6  get channel struct from wiphy for specified frequency
7 </span></dt><dt><span class="refentrytitle"><a href="API-ieee80211-get-response-rate.html"><span class="phrase">ieee80211_get_response_rate</span></a></span><span class="refpurpose"> &#8212; 
8  get basic rate for a given rate
9 </span></dt><dt><span class="refentrytitle"><a href="API-ieee80211-hdrlen.html"><span class="phrase">ieee80211_hdrlen</span></a></span><span class="refpurpose"> &#8212; 
10  get header length in bytes from frame control
11 </span></dt><dt><span class="refentrytitle"><a href="API-ieee80211-get-hdrlen-from-skb.html"><span class="phrase">ieee80211_get_hdrlen_from_skb</span></a></span><span class="refpurpose"> &#8212; 
12  get header length from data
13 </span></dt><dt><span class="refentrytitle"><a href="API-struct-ieee80211-radiotap-iterator.html"><span class="phrase">struct ieee80211_radiotap_iterator</span></a></span><span class="refpurpose"> &#8212; 
14  tracks walk thru present radiotap args
15 </span></dt></dl></div><p>
16   </p><p>
17   cfg80211 offers a number of utility functions that can be useful.
18</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-ieee80211-bss-get-ie.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="cfg80211-developers-guide.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-ieee80211-channel-to-frequency.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">ieee80211_bss_get_ie</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">ieee80211_channel_to_frequency</span></td></tr></table></div></body></html>
19