📄 listen.htm
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /><title> UDT Reference</title><link rel="stylesheet" href="udtdoc.css" type="text/css" /></head><body><div class="ref_head"> UDT Reference: Functions</div><h4 class="func_name"><strong>listen</strong></h4><p>The <b>listen</b> method enables a server UDT entity to wait for clients to connect.</p><div class="code">int list(<br /> UDTSOCKET <font color="#FFFFFF">u</font><br /> int <font color="#FFFFFF">backlog</font><br />);</div><h5>Parameters</h5><dl> <dt><i>u</i></dt> <dd>[in] Descriptor identifying the server socket.</dd> <dt><i>backlog</i></dt> <dd>[in] Maximum number of pending connections.</dd></dl><h5>Return Value</h5><p>If success, 0 is returned; otherwise, UDT::ERROR is returned and specific error information can be retrieved by <a href="error.htm">getlasterror</a>.</p><table width="100%" border="1" cellpadding="2" cellspacing="0" bordercolor="#CCCCCC"> <tr> <td width="17%" class="table_headline"><strong>Error Name</strong></td> <td width="17%" class="table_headline"><strong>Error Code</strong></td> <td width="83%" class="table_headline"><strong>Comment</strong></td> </tr> <tr> <td>ECONNSOCK</td> <td>5002</td> <td><i>u</i> is already connected.</td> </tr> <tr> <td>EINVSOCK</td> <td>5004</td> <td><i>u</i> is an invalid socket.</td> </tr> <tr> <td>EUNBOUNDSOCK</td> <td>5005</td> <td><i>u</i> is not bound.</td> </tr> <tr> <td>ERDVNOSERV</td> <td>5007</td> <td><i>u</i> is in rendezvous mode.</td> </tr></table><h5>Description</h5><p>The <strong>listen</strong> method lets a UDT socket enter listening state. The socket must call <strong>bind</strong> before a <strong>listen</strong> call. In addition, if the socket is enable for rendezvous mode, neither <strong>listen</strong> nor <strong>accept</strong> can be used on the socket. A UDT socket can call <strong>listen</strong> more than once, in which case only the first call is effective, while all subsequent calls will be ignored if the socket is already in listening state.</p><h5>See Also</h5><p><strong><a href="bind.htm">bind</a>, <a href="accept.htm">accpet</a>, <a href="connect.htm">connect</a></strong></p><p> </p></body></html>⌨️ 快捷键说明
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