org.apache.commons.net.echo

Class EchoUDPClient

public final class EchoUDPClient extends DiscardUDPClient

The EchoUDPClient class is a UDP implementation of a client for the Echo protocol described in RFC 862. To use the class, just open a local UDP port with open and call send to send datagrams to the server, then call receive to receive echoes. After you're done echoing data, call close() to clean up properly.

Author: Daniel F. Savarese

Field Summary
static int	DEFAULT_PORT The default echo port.

Method Summary
int	receive(byte[] data, int length) Receives echoed data and returns its length.
int	receive(byte[] data) Same as `receive(data, data.length)` **

Field Detail

DEFAULT_PORT

public static final int DEFAULT_PORT

The default echo port. It is set to 7 according to RFC 862. **

Method Detail

receive

public int receive(byte[] data, int length)

Receives echoed data and returns its length. The data may be divided up among multiple datagrams, requiring multiple calls to receive. Also, the UDP packets will not necessarily arrive in the same order they were sent.

Returns: Length of actual data received.

Throws: IOException If an error occurs while receiving the data.

receive

public int receive(byte[] data)

Same as receive(data, data.length) **