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org.apache.commons.net

Class DaytimeUDPClient

public final class DaytimeUDPClient
extends DatagramSocketClient
The DaytimeUDPClient class is a UDP implementation of a client for the Daytime protocol described in RFC 867. To use the class, merely open a local datagram socket with open and call getTime to retrieve the daytime string, then call close to close the connection properly. Unlike DaytimeTCPClient , successive calls to getTime are permitted without re-establishing a connection. That is because UDP is a connectionless protocol and the Daytime protocol is stateless.

Author:
Daniel F. Savarese

See Also:
DaytimeTCPClient

Field Summary

static int
DEFAULT_PORT
The default daytime port.
private byte[]
__dummyData
private byte[]
__timeData

Fields inherited from class org.apache.commons.net.DatagramSocketClient

__DEFAULT_SOCKET_FACTORY, _isOpen_, _socketFactory_, _socket_, _timeout_

Method Summary

String
getTime(InetAddress host)
Same as getTime(host, DaytimeUDPClient.DEFAULT_PORT); **
String
getTime(InetAddress host, int port)
Retrieves the time string from the specified server and port and returns it.

Methods inherited from class org.apache.commons.net.DatagramSocketClient

close, getDefaultTimeout, getLocalAddress, getLocalPort, getSoTimeout, isOpen, open, open, open, setDatagramSocketFactory, setDefaultTimeout, setSoTimeout

Field Details

DEFAULT_PORT

public static final int DEFAULT_PORT
The default daytime port. It is set to 13 according to RFC 867. **

Field Value:
13

__dummyData

private byte[] __dummyData

__timeData

private byte[] __timeData

Method Details

getTime

public String getTime(InetAddress host)
            throws IOException
Same as getTime(host, DaytimeUDPClient.DEFAULT_PORT); **

getTime

public String getTime(InetAddress host,
                      int port)
            throws IOException
Retrieves the time string from the specified server and port and returns it.

Parameters:
host - The address of the server.
port - The port of the service.

Returns:
The time string.

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