pears in the pbuf payload.</p>
<p>The -&gt;payload, -&gt;tot_len and -&gt;len fields are adjusted.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">p</td><td>pbuf to change the header size. </td></tr>
    <tr><td class="paramname">header_size_decrement</td><td>Number of bytes to decrement header size which decreases the size of the pbuf. If header_size_decrement is 0, this function does nothing and returns successful. </td></tr>
  </table>
  </dd>
</dl>
<