Package com.oroinc.net
Class EchoUDPClient
java.lang.Object
com.oroinc.net.DatagramSocketClient
com.oroinc.net.DiscardUDPClient
com.oroinc.net.EchoUDPClient
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
- See Also:
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Field Summary
FieldsFields inherited from class com.oroinc.net.DatagramSocketClient
_isOpen_, _socket_, _socketFactory_, _timeout_
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
receive
(byte[] data) Same asreceive(data, data.length)
int
receive
(byte[] data, int length) Receives echoed data and returns its length.void
send
(byte[] data, int length, InetAddress host) Sends the specified data to the specified server at the default echo port.void
send
(byte[] data, InetAddress host) Same assend(data, data.length, host)
Methods inherited from class com.oroinc.net.DiscardUDPClient
send
Methods inherited from class com.oroinc.net.DatagramSocketClient
close, getDefaultTimeout, getLocalAddress, getLocalPort, getSoTimeout, isOpen, open, open, open, setDatagramSocketFactory, setDefaultTimeout, setSoTimeout
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Field Details
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DEFAULT_PORT
public static final int DEFAULT_PORTThe default echo port. It is set to 7 according to RFC 862.- See Also:
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Constructor Details
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EchoUDPClient
public EchoUDPClient()
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Method Details
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send
Sends the specified data to the specified server at the default echo port.- Overrides:
send
in classDiscardUDPClient
- Parameters:
data
- The echo data to send.length
- The length of the data to send. Should be less than or equal to the length of the data byte array.host
- The address of the server.- Throws:
IOException
- If an error occurs during the datagram send operation.
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send
Same assend(data, data.length, host)
- Overrides:
send
in classDiscardUDPClient
- Throws:
IOException
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receive
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.
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receive
Same asreceive(data, data.length)
- Throws:
IOException
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