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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>ieee80211_get_buffered_bc</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="AP.html" title="Chapter&#160;12.&#160;Access point mode support" /><link rel="prev" href="AP.html" title="Chapter&#160;12.&#160;Access point mode support" /><link rel="next" href="API-ieee80211-beacon-get.html" title="ieee80211_beacon_get" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">ieee80211_get_buffered_bc</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="AP.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;12.&#160;Access point mode support</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-ieee80211-beacon-get.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="API-ieee80211-get-buffered-bc"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ieee80211_get_buffered_bc &#8212; 
  accessing buffered broadcast and multicast frames
 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">struct sk_buff * <strong class="fsfunc">ieee80211_get_buffered_bc </strong>(</code></td><td>struct ieee80211_hw * <var class="pdparam">hw</var>, </td></tr><tr><td>&#160;</td><td>struct ieee80211_vif * <var class="pdparam">vif</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a id="idm139754516912304"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>hw</code></em></span></dt><dd><p>
     pointer as obtained from <code class="function">ieee80211_alloc_hw</code>.
    </p></dd><dt><span class="term"><em class="parameter"><code>vif</code></em></span></dt><dd><p>
     <span class="structname">struct ieee80211_vif</span> pointer from the add_interface callback.
    </p></dd></dl></div></div><div class="refsect1"><a id="idm139754516906000"></a><h2>Description</h2><p>
   Function for accessing buffered broadcast and multicast frames. If
   hardware/firmware does not implement buffering of broadcast/multicast
   frames when power saving is used, 802.11 code buffers them in the host
   memory. The low-level driver uses this function to fetch next buffered
   frame. In most cases, this is used when generating beacon frame.
</p></div><div class="refsect1"><a id="idm139754516904432"></a><h2>Return</h2><p>
   A pointer to the next buffered skb or NULL if no more buffered
   frames are available.
</p></div><div class="refsect1"><a id="idm139754516903136"></a><h2>Note</h2><p>
   buffered frames are returned only after DTIM beacon frame was
   generated with <code class="function">ieee80211_beacon_get</code> and the low-level driver must thus
   call <code class="function">ieee80211_beacon_get</code> first. <code class="function">ieee80211_get_buffered_bc</code> returns
   NULL if the previous generated beacon was not DTIM, so the low-level driver
   does not need to check for DTIM beacons separately and should be able to
   use common code for all beacons.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="AP.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="AP.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-ieee80211-beacon-get.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter&#160;12.&#160;Access point mode support&#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_beacon_get</span></td></tr></table></div></body></html>