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<title>dftest\ -\ The\ Wireshark\ Network\ Analyzer\ 1.12.1</title>
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<h1 id="NAME">NAME</h1>
<p>dftest - Shows display filter byte-code, for debugging dfilter routines.</p>
<h1 id="SYNOPSIS">SYNOPSIS</h1>
<p><b>dftest</b> <span style="white-space: nowrap;">[ <filter> ]</span></p>
<h1 id="DESCRIPTION">DESCRIPTION</h1>
<p><b>dftest</b> is a simple tool which compiles a display filter and shows its bytecode.</p>
<h1 id="OPTIONS">OPTIONS</h1>
<dl>
<dt id="filter">filter</dt>
<dd>
<p>The display filter expression. If needed it has to be quoted.</p>
</dd>
</dl>
<h1 id="EXAMPLES">EXAMPLES</h1>
<p>Show how the IP protocol is filtered:</p>
<pre><code> dftest ip</code></pre>
<p>Shows how frame 150 is filtered:</p>
<pre><code> dftest "frame.number == 150"</code></pre>
<h1 id="SEE-ALSO">SEE ALSO</h1>
<p>wireshark-filter(4)</p>
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