="l00185"></a><span class="lineno">  185</span>    {</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>        <a class="code hl_variable" href="classunified_packet_attr.html#a18d5af3ab811cd9b2b1dc76559f7df7d">protocol</a> = 2; <span class="comment">// ICMP协议</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>        <span class="comment">// ICMP没有端口概念，端口字段不设置</span></div>
<div class="line">