 name="l00132"></a><span class="lineno">  132</span>    <a class="code hl_variable" href="classunified_packet_attr.html#a35cea9a1cbef5fe69c8ed3f32ce7217a">protocol_ip</a> = ipv4hdr-&gt;protocol;</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span> </div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>    <span class="comment">// 判断IP版本</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135<