public class Telnet
extends java.lang.Object
implements java.io.Serializable
public class TelnetExample extends TelnetAdapter { private Telnet telnet = null; private OutputStream output = null; private static BufferedReader reader = null; private boolean connected = false; private String hostname = "10.0.0.1"; public TelnetExample() throws IOException, TelnetException { // create new Telnet instance telnet = new Telnet(hostname); // register this class as TelnetListener telnet.addTelnetListener(this); // establish Telnet connection telnet.connect(); connected = true; // get output stream output = telnet.getOutputStream(); // sends all data entered at console to Telnet server String input = null; while ((input = reader.readLine()) != null) { if (connected) { ((TelnetOutputStream) output).println(input); } else { break; } } } // Invoked when Telnet socked is connected. public void connected(TelnetConnectedEvent event) { System.out.println("Connected"); } // Invoked when Telnet socket is disconnected. Disconnect can public void disconnected(TelnetDisconnectedEvent event) { connected = false; System.out.print("Disconnected. Press enter key to quit."); } // Invoked when Telnet server requests that the Telnet client begin performing specifiedTelnetOption
. public void doOption(DoOptionEvent event) { // refuse any options requested by Telnet server telnet.sendWontOption(event.getOption()); } // Invoked when Telnet server offers to begin performing specifiedTelnetOption
. public void willOption(WillOptionEvent event) { // refuse any options offered by Telnet server telnet.sendDontOption(event.getOption()); } // Invoked when data is received from Telnet server. public void dataReceived(TelnetDataReceivedEvent event) { // print data recevied from Telnet server to console System.out.print(event.getData()); } // starts console program public static void main(String[] args) { try { // create BufferedReader to read data from console reader = new BufferedReader(new InputStreamReader(System.in)); // create new TelnetExample instance TelnetExample example = new TelnetExample(); } catch (Exception e) { e.printStackTrace(System.out); } } }
Modifier and Type | Class and Description |
---|---|
class |
Telnet.ByteDecoder
Byte Decoder
|
class |
Telnet.DefaultDecoder
Default Decoder
|
class |
Telnet.EUCKoreanDecoder
EUC Korean Decoder
|
class |
Telnet.UTF8Decoder
UTF8 Decoder
|
Modifier and Type | Field and Description |
---|---|
static java.lang.String[] |
COMMAND_MAP
This field can be used to map command codes to their String
representation.
|
static int |
TC_AO
Telnet command : Abort output
|
static int |
TC_AYT
Telnet command : Are You There
|
static int |
TC_BRK
Telnet command : Break.
NVT character BRK. |
static int |
TC_DM
Telnet command : Data Mark.
The data stream portion of a Synch. |
static int |
TC_DO
Telnet command : DO.
Indicates the request that the other party perform, or confirmation that you are expecting the other party to perform, the indicated option. |
static int |
TC_DONT
Telnet command : DON'T.
Indicates the demand that the other party stop performing, or confirmation that you are no longer expecting the other party to perform, the indicated option. |
static int |
TC_GA
Telnet command : Go ahead
|
static int |
TC_IP
Telnet command : Interrupt Process.
|
static int |
TC_NOP
Telnet command : No operation.
|
static int |
TC_SB
Telnet command : Subnegotiation.
Indicates that what follows is subnegotiation of the indicated option. |
static int |
TC_SE
Telnet command : End of subnegotiation parameters.
|
static int |
TC_WILL
Telnet command : WILL.
Indicates the desire to begin performing, or confirmation that you are now performing, the indicated option. |
static int |
TC_WONT
Telnet command : WON'T.
Indicates the refusal to perform, or continue performing, the indicated option. |
static int |
TSC_BEL
Telnet special character : BELL.
Produces an audible or visible signal (which does NOT move the print head). |
static int |
TSC_BS
Telnet special character : Back Space.
Moves the print head one character position towards the left margin. |
static int |
TSC_CR
Telnet special character : Carriage Return.
Moves the printer to the left margin of the current line. |
static int |
TSC_EC
Telnet special character : Erase character
|
static int |
TSC_EL
Telnet special character : Erase line
|
static int |
TSC_FF
Telnet special character : Form Feed.
Moves the printer to the top of the next page, keeping the same horizontal position. |
static int |
TSC_HT
Telnet special character : Horizontal Tab.
Moves the printer to the next horizontal tab stop. |
static int |
TSC_IAC
Telnet escape charater : Interpret as Command
|
static int |
TSC_LF
Telnet special character : Line Feed.
Moves the printer to the next print line, keeping the same horizontal position. |
static int |
TSC_NULL
Telnet special character : No operation
|
static int |
TSC_VT
Telnet special character : Vertical Tab.
Moves the printer to the next vertical tab stop. |
Constructor and Description |
---|
Telnet(java.lang.String hostname)
Constructs Telnet object for connection to specified host.
|
Telnet(java.lang.String host,
int port)
Constructs Telnet object.
|
Modifier and Type | Method and Description |
---|---|
void |
addTelnetListener(TelnetListener listener)
Add telnet event listener.
|
void |
clearProxySettings()
Clears proxy server values.
|
void |
connect()
Connect the client socket to host and port specified by contructor or
setHostname(java.lang.String) , setPort(int) methods. |
void |
disconnect()
Disconnects and releases all associated resources.
|
java.lang.String |
getCharacterSet()
Gets the character set used when reading data from Telnet server.
|
java.lang.String |
getCommandName(int command)
Gets name of command based on corresponding command.
|
boolean |
getDebug()
Gets debugging state.
|
java.io.PrintStream |
getDebugStream()
Gets PrintStream used in reporting debug statements.
|
java.lang.String |
getHostname()
Return server hostname.
|
java.io.InputStream |
getInputStream()
Returns input stream associated with current Telnet connection.
|
java.io.OutputStream |
getOutputStream()
Returns output stream associated with current telnet connection.
|
int |
getPort()
Return server port.
|
java.io.Reader |
getReader()
Returns Reader object for reading from the server.
|
int |
getReadingTimeout()
Returns the socket reading timeout value.
|
int |
getTimeout()
Gets the timeout for opening connection to Telnet server.
|
java.io.Writer |
getWriter()
Returns Writer object for writing to server.
|
void |
removeTelnetListener(TelnetListener listener)
Remove telnet event listener.
|
void |
sendCommand(int command)
Sends telnet command.
|
void |
sendCommand(int command,
int parameter)
Sends telnet command with specified parameter.
|
void |
sendDontOption(TelnetOption opt)
Sends Telnet option to server with Telnet DONT OPTION (refuse request to use option)
command
|
void |
sendDoOption(TelnetOption opt)
Sends Telnet option to server with Telnet DO OPTION (request to use option)
command
|
void |
sendOptionSubnegotiation(TelnetOption opt)
Initiate subnegotiation for option.
|
void |
sendWillOption(TelnetOption opt)
Sends Telnet option to server with Telnet WILL OPTION (accept offer to use option)
command.
|
void |
sendWontOption(TelnetOption opt)
Sends Telnet option to server with Telnet WONT OPTION (refuse offer to use option)
command.
|
void |
setCharacterSet(java.lang.String characterSet)
Sets character set used when reading data from telnet server
|
void |
setDebug(boolean debug)
Enable debugging output to debugging stream.
|
void |
setDebugStream(java.io.PrintStream debugStream)
Sets PrintStream used in reporting debug statements.
|
void |
setHostname(java.lang.String hostname)
Set server hostname.
|
void |
setPort(int port)
Set server port.
|
void |
setProxyAuthentication(java.lang.String proxyUsername,
java.lang.String proxyPassword)
Sets the username and password to use when for authentication with
proxy server.
|
void |
setProxyHost(java.lang.String proxyHostname,
int proxyPort)
Sets the proxy hostname and port for this connection.
|
void |
setProxyType(java.lang.String proxyType)
Sets the proxy type will be used for this connection.
|
void |
setReadingTimeout(int value)
Sets the socket reading timeout value.
|
void |
setTimeout(int timeout)
Sets the timeout for opening connection to Telnet server.
|
public static final int TSC_NULL
public static final int TSC_BEL
public static final int TSC_BS
public static final int TSC_HT
public static final int TSC_LF
public static final int TSC_VT
public static final int TSC_FF
public static final int TSC_CR
public static final int TC_SE
public static final int TC_NOP
public static final int TC_DM
public static final int TC_BRK
public static final int TC_IP
public static final int TC_AO
public static final int TC_AYT
public static final int TSC_EC
public static final int TSC_EL
public static final int TC_GA
public static final int TC_SB
public static final int TC_WILL
public static final int TC_WONT
public static final int TC_DO
public static final int TC_DONT
public static final int TSC_IAC
public static final java.lang.String[] COMMAND_MAP
public Telnet(java.lang.String hostname)
hostname
- the hostname or IP address of the Telnet serverpublic Telnet(java.lang.String host, int port)
host
- the hostname or IP address of the Telnet serverport
- the port of the Telnet serverpublic void connect() throws TelnetException
setHostname(java.lang.String)
, setPort(int)
methods.TelnetException
public void disconnect()
public void setHostname(java.lang.String hostname)
hostname
- the hostname or IP address of the Telnet serverpublic java.lang.String getHostname()
public void setPort(int port)
port
- the port of the Telnet serverpublic int getPort()
public void setProxyAuthentication(java.lang.String proxyUsername, java.lang.String proxyPassword)
#clearProxySettings
method.proxyUsername
- the proxy usernameproxyPassword
- the proxy passwordclearProxySettings()
public void setProxyHost(java.lang.String proxyHostname, int proxyPort)
#clearProxySettings
method.proxyHostname
- the hostname or ip address of the proxy serverproxyPort
- the port of the proxy serverclearProxySettings()
public void setProxyType(java.lang.String proxyType)
proxyType
- The proxy type. Valid values: HTTP, SOCKS5public void clearProxySettings()
public void addTelnetListener(TelnetListener listener)
listener
- a TelnetListenerTelnetListener
public void removeTelnetListener(TelnetListener listener)
listener
- a TelnetListenerTelnetListener
public void sendCommand(int command)
command
- the command to sendpublic void sendCommand(int command, int parameter)
command
- the command to sendparameter
- the parameter to sendpublic java.io.InputStream getInputStream()
public java.io.OutputStream getOutputStream()
public java.io.Reader getReader()
public java.io.Writer getWriter()
public void sendOptionSubnegotiation(TelnetOption opt)
opt
- a TelnetOptionTelnetOption
public java.lang.String getCommandName(int command)
command
- the command codepublic void sendWillOption(TelnetOption opt)
opt
- the option to sendpublic void sendWontOption(TelnetOption opt)
opt
- the option to sendpublic void sendDoOption(TelnetOption opt)
opt
- the option to sendpublic void sendDontOption(TelnetOption opt)
opt
- the option to sendpublic void setDebug(boolean debug)
debug
- true if debugging enabled, false otherwisesetDebugStream(java.io.PrintStream)
public boolean getDebug()
true
if debugging is enabledpublic java.io.PrintStream getDebugStream()
PrintStream
public void setTimeout(int timeout)
timeout
- the timeout in millisecondspublic int getTimeout()
public int getReadingTimeout()
public void setReadingTimeout(int value)
value
- timeout value is millispublic void setCharacterSet(java.lang.String characterSet)
characterSet
- the character setpublic java.lang.String getCharacterSet()
public void setDebugStream(java.io.PrintStream debugStream)
debugStream
- the PrintStream to send debug statements toPrintStream
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