<!-- ##### SECTION Title ##### -->NETUDP<!-- ##### SECTION Short_Description ##### -->A UDP interface for IPv4 and IPv6.<!-- ##### SECTION Long_Description ##### --><para>These functions provide a unified interface for sending are receivingUDP datagrams over IPv4 and IPv6 networks.  </para><para>For IPv6 addresses to work the common library must be built with IPv6enabled.  On UNIX, the <application>configure</application> script has an option <option>--enable-ip-v6</option>for this purpose.  On Win32, there is a project configuration to usethe Microsoft IPv6 stack when installed.</para><!-- ##### SECTION See_Also ##### --><para></para><!-- ##### STRUCT socket_udp ##### --><para>An opaque data structure containing information for a UDP session.</para><!-- ##### FUNCTION udp_addr_valid ##### --><para></para>@addr: @Returns: <!-- ##### FUNCTION udp_init ##### --><para></para>@addr: @rx_port: @tx_port: @ttl: @Returns: <!-- ##### FUNCTION udp_init_if ##### --><para></para>@addr: @iface: @rx_port: @tx_port: @ttl: @Returns: <!-- ##### FUNCTION udp_exit ##### --><para></para>@s: <!-- ##### FUNCTION udp_send ##### --><para></para>@s: @buffer: @buflen: @Returns: <!-- ##### FUNCTION udp_recv ##### --><para></para>@s: @buffer: @buflen: @Returns: <!-- ##### FUNCTION udp_select ##### --><para></para>@timeout: @Returns: <!-- ##### FUNCTION udp_fd_zero ##### --><para></para><!-- ##### FUNCTION udp_fd_set ##### --><para></para>@s: <!-- ##### FUNCTION udp_fd_isset ##### --><para></para>@s: @Returns: <!-- ##### FUNCTION udp_host_addr ##### --><para></para>@s: @Returns: <!-- ##### FUNCTION udp_fd ##### --><para></para>@s: @Returns: