org.apache.commons.net
Class CharGenTCPClient

java.lang.Object
  org.apache.commons.net.SocketClient
      org.apache.commons.net.CharGenTCPClient

public final class CharGenTCPClient
extends SocketClient

The CharGenTCPClient class is a TCP implementation of a client for the character generator protocol described in RFC 864. It can also be used for Systat (RFC 866), Quote of the Day (RFC 865), and netstat (port 15). All of these protocols involve connecting to the appropriate port, and reading data from an input stream. The chargen protocol actually sends data until the receiving end closes the connection. All of the others send only a fixed amount of data and then close the connection.

To use the CharGenTCPClient class, just establish a connection with connect and call getInputStream() to access the data. Don't close the input stream when you're done with it. Rather, call disconnect to clean up properly.

Author:

Daniel F. Savarese

See Also:

CharGenUDPClient

Field Summary

static int	CHARGEN_PORT The character generator port value of 19 according to RFC 864.
static int	DEFAULT_PORT The default chargen port.
static int	NETSTAT_PORT The netstat port value of 19.
static int	QUOTE_OF_DAY_PORT The quote of the day port value of 17 according to RFC 865.
static int	SYSTAT_PORT The systat port value of 11 according to RFC 866.

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

_defaultPort_, _input_, _isConnected_, _output_, _socket_, _socketFactory_, _timeout_, NETASCII_EOL

Constructor Summary

CharGenTCPClient()
The default constructor for CharGenTCPClient.

Method Summary

InputStream

getInputStream() Returns an InputStream from which the server generated data can be read.

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

_connectAction_, connect, connect, connect, connect, connect, connect, disconnect, getDefaultPort, getDefaultTimeout, getLocalAddress, getLocalPort, getRemoteAddress, getRemotePort, getSoLinger, getSoTimeout, getTcpNoDelay, isConnected, setDefaultPort, setDefaultTimeout, setSocketFactory, setSoLinger, setSoTimeout, setTcpNoDelay, verifyRemote

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SYSTAT_PORT

public static final int SYSTAT_PORT

The systat port value of 11 according to RFC 866.

See Also:

Constant Field Values

NETSTAT_PORT

public static final int NETSTAT_PORT

The netstat port value of 19.

See Also:

Constant Field Values

QUOTE_OF_DAY_PORT

public static final int QUOTE_OF_DAY_PORT

The quote of the day port value of 17 according to RFC 865.

See Also:

Constant Field Values

CHARGEN_PORT

public static final int CHARGEN_PORT

The character generator port value of 19 according to RFC 864.

See Also:

Constant Field Values

DEFAULT_PORT

public static final int DEFAULT_PORT

The default chargen port. It is set to 19 according to RFC 864.

See Also:

Constant Field Values

Constructor Detail

CharGenTCPClient

public CharGenTCPClient()

The default constructor for CharGenTCPClient. It merely sets the default port to DEFAULT_PORT .

Method Detail

getInputStream

public InputStream getInputStream()

Returns an InputStream from which the server generated data can be read. You should NOT close the InputStream when you're finished reading from it. Rather, you should call disconnect to clean up properly.

Returns:

An InputStream from which the server generated data can be read.