re></dt>
<dd>
<p>Open an existing file descriptor or SOCKET as a UDP handle.</p>
<p>Unix only: The only requirement of the sock argument is that it follows the datagram contract (works in unconnected mode, supports sendmsg()/recvmsg(), etc). In other words, other datagram-type sockets like raw sockets or netlink sockets can also be passed to this function.</p>
<p>Changed in version 1.2.1: the file descriptor is set to non-blocking mode.</p>
<blockquote><p>Note: The passed file descriptor or SOCKET is not ch