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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>uIP 1.0: Variables used in uIP device drivers</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.6 --><div class="tabs">  <ul>    <li><a href="main.html"><span>Main&nbsp;Page</span></a></li>    <li><a href="modules.html"><span>Modules</span></a></li>    <li><a href="classes.html"><span>Data&nbsp;Structures</span></a></li>    <li><a href="files.html"><span>Files</span></a></li>    <li><a href="examples.html"><span>Examples</span></a></li>  </ul></div><h1>Variables used in uIP device drivers<br><small>[<a class="el" href="a00150.html">The uIP TCP/IP stack</a>]</small></h1><hr><a name="_details"></a><h2>Detailed Description</h2>uIP has a few global variables that are used in device drivers for uIP. <p><p><table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr><tr><td colspan="2"><br><h2>Variables</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">uip_len</a></td></tr><tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">The length of the packet in the uip_buf buffer.  <a href="#g12a33f0c09711167bdf3dd7d7cf8c5a1"></a><br></td></tr></table><hr><h2>Variable Documentation</h2><a class="anchor" name="g12a33f0c09711167bdf3dd7d7cf8c5a1"></a><!-- doxytag: member="uip.h::uip_len" ref="g12a33f0c09711167bdf3dd7d7cf8c5a1" args="" --><p><table class="mdTable" cellpadding="2" cellspacing="0">  <tr>    <td class="mdRow">      <table cellpadding="0" cellspacing="0" border="0">        <tr>          <td class="md" nowrap valign="top"><a class="el" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> <a class="el" href="a00150.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">uip_len</a>          </td>        </tr>      </table>    </td>  </tr></table><table cellspacing="5" cellpadding="0" border="0">  <tr>    <td>      &nbsp;    </td>    <td><p>The length of the packet in the uip_buf buffer. <p>The global variable uip_len holds the length of the packet in the uip_buf buffer.<p>When the network device driver calls the uIP input function, uip_len should be set to the length of the packet in the uip_buf buffer.<p>When sending packets, the device driver should use the contents of the uip_len variable to determine the length of the outgoing packet. <dl compact><dt><b>Examples: </b></dt><dd><a class="el" href="a00042.html#a68">example-mainloop-with-arp.c</a>, and <a class="el" href="a00043.html#a92">example-mainloop-without-arp.c</a>.</dl><p>Definition at line <a class="el" href="a00201.html#l00155">155</a> of file <a class="el" href="a00201.html">uip.c</a>.<p>Referenced by <a class="el" href="a00204.html#l00278">uip_arp_arpin()</a>, <a class="el" href="a00201.html#l00682">uip_process()</a>, and <a class="el" href="a00199.html#l00049">uip_split_output()</a>.    </td>  </tr></table><hr size="1"><address style="align: right;"><small>Generated on Mon Jun 12 10:23:02 2006 for uIP 1.0 by&nbsp;<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.6 </small></address></body></html>
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