Package org.apache.commons.net.telnet

Class TelnetOption

java.lang.Object

org.apache.commons.net.telnet.TelnetOption

public class TelnetOption
extends Object

The TelnetOption class cannot be instantiated and only serves as a storehouse for telnet option constants.

Details regarding Telnet option specification can be found in RFC 855.

See Also:

• Telnet
• TelnetClient

Field Summary

Fields

Modifier and Type	Field	Description
static final int	APPROXIMATE_MESSAGE_SIZE	4
static final int	AUTHENTICATION	37
static final int	BINARY	0
static final int	BYTE_MACRO	19
static final int	DATA_ENTRY_TERMINAL	20
static final int	ECHO	1
static final int	ENCRYPTION	38
static final int	END_OF_RECORD	25
static final int	EXTENDED_ASCII	17
static final int	EXTENDED_OPTIONS_LIST	255
private static final int	FIRST_OPTION	0
static final int	FORCE_LOGOUT	18
private static final int	LAST_OPTION	255
static final int	LINEMODE	34
static final int	MAX_OPTION_VALUE	The maximum value an option code can have.
static final int	NEGOTIATE_CARRIAGE_RETURN	10
static final int	NEGOTIATE_FORMFEED	13
static final int	NEGOTIATE_HORIZONTAL_TAB	12
static final int	NEGOTIATE_HORIZONTAL_TAB_STOP	11
static final int	NEGOTIATE_LINEFEED	16
static final int	NEGOTIATE_OUTPUT_LINE_WIDTH	8
static final int	NEGOTIATE_OUTPUT_PAGE_SIZE	9
static final int	NEGOTIATE_VERTICAL_TAB	15
static final int	NEGOTIATE_VERTICAL_TAB_STOP	14
static final int	NEW_ENVIRONMENT_VARIABLES	39
static final int	OLD_ENVIRONMENT_VARIABLES	36
private static final String[]	optionString
static final int	OUTPUT_MARKING	27
static final int	PREPARE_TO_RECONNECT	2
static final int	REGIME_3270	29
static final int	REMOTE_CONTROLLED_TRANSMISSION	7
static final int	REMOTE_FLOW_CONTROL	33
static final int	SEND_LOCATION	23
static final int	STATUS	5
static final int	SUPDUP	21
static final int	SUPDUP_OUTPUT	22
static final int	SUPPRESS_GO_AHEAD	3
static final int	TACACS_USER_IDENTIFICATION	26
static final int	TERMINAL_LOCATION_NUMBER	28
static final int	TERMINAL_SPEED	32
static final int	TERMINAL_TYPE	24
static final int	TIMING_MARK	6
static final int	WINDOW_SIZE	31
static final int	X_DISPLAY_LOCATION	35
static final int	X3_PAD	30

Constructor Summary

Constructors

Modifier	Constructor	Description
private	TelnetOption()	Cannot be instantiated.

Method Summary

Modifier and Type	Method	Description
static final String	getOption(int code)	Returns the string representation of the telnet protocol option corresponding to the given option code.
static final boolean	isValidOption(int code)	Determines if a given option code is valid.

Methods inherited from class java.lang.Object

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

Field Details

MAX_OPTION_VALUE

public static final int MAX_OPTION_VALUE

The maximum value an option code can have. This value is 255.

See Also:

• Constant Field Values

BINARY

public static final int BINARY

0

See Also:

• Constant Field Values

ECHO

public static final int ECHO

1

See Also:

• Constant Field Values

PREPARE_TO_RECONNECT

public static final int PREPARE_TO_RECONNECT

2

See Also:

• Constant Field Values

SUPPRESS_GO_AHEAD

public static final int SUPPRESS_GO_AHEAD

3

See Also:

• Constant Field Values

APPROXIMATE_MESSAGE_SIZE

public static final int APPROXIMATE_MESSAGE_SIZE

4

See Also:

• Constant Field Values

STATUS

public static final int STATUS

5

See Also:

• Constant Field Values

TIMING_MARK

public static final int TIMING_MARK

6

See Also:

• Constant Field Values

REMOTE_CONTROLLED_TRANSMISSION

public static final int REMOTE_CONTROLLED_TRANSMISSION

7

See Also:

• Constant Field Values

NEGOTIATE_OUTPUT_LINE_WIDTH

public static final int NEGOTIATE_OUTPUT_LINE_WIDTH

8

See Also:

• Constant Field Values

NEGOTIATE_OUTPUT_PAGE_SIZE

public static final int NEGOTIATE_OUTPUT_PAGE_SIZE

9

See Also:

• Constant Field Values

NEGOTIATE_CARRIAGE_RETURN

public static final int NEGOTIATE_CARRIAGE_RETURN

10

See Also:

• Constant Field Values

NEGOTIATE_HORIZONTAL_TAB_STOP

public static final int NEGOTIATE_HORIZONTAL_TAB_STOP

11

See Also:

• Constant Field Values

NEGOTIATE_HORIZONTAL_TAB

public static final int NEGOTIATE_HORIZONTAL_TAB

12

See Also:

• Constant Field Values

NEGOTIATE_FORMFEED

public static final int NEGOTIATE_FORMFEED

13

See Also:

• Constant Field Values

NEGOTIATE_VERTICAL_TAB_STOP

public static final int NEGOTIATE_VERTICAL_TAB_STOP

14

See Also:

• Constant Field Values

NEGOTIATE_VERTICAL_TAB

public static final int NEGOTIATE_VERTICAL_TAB

15

See Also:

• Constant Field Values

NEGOTIATE_LINEFEED

public static final int NEGOTIATE_LINEFEED

16

See Also:

• Constant Field Values

EXTENDED_ASCII

public static final int EXTENDED_ASCII

17

See Also:

• Constant Field Values

FORCE_LOGOUT

public static final int FORCE_LOGOUT

18

See Also:

• Constant Field Values

BYTE_MACRO

public static final int BYTE_MACRO

19

See Also:

• Constant Field Values

DATA_ENTRY_TERMINAL

public static final int DATA_ENTRY_TERMINAL

20

See Also:

• Constant Field Values

SUPDUP

public static final int SUPDUP

21

See Also:

• Constant Field Values

SUPDUP_OUTPUT

public static final int SUPDUP_OUTPUT

22

See Also:

• Constant Field Values

SEND_LOCATION

public static final int SEND_LOCATION

23

See Also:

• Constant Field Values

TERMINAL_TYPE

public static final int TERMINAL_TYPE

24

See Also:

• Constant Field Values

END_OF_RECORD

public static final int END_OF_RECORD

25

See Also:

• Constant Field Values

TACACS_USER_IDENTIFICATION

public static final int TACACS_USER_IDENTIFICATION

26

See Also:

• Constant Field Values

OUTPUT_MARKING

public static final int OUTPUT_MARKING

27

See Also:

• Constant Field Values

TERMINAL_LOCATION_NUMBER

public static final int TERMINAL_LOCATION_NUMBER

28

See Also:

• Constant Field Values

REGIME_3270

public static final int REGIME_3270

29

See Also:

• Constant Field Values

X3_PAD

public static final int X3_PAD

30

See Also:

• Constant Field Values

WINDOW_SIZE

public static final int WINDOW_SIZE

31

See Also:

• Constant Field Values

TERMINAL_SPEED

public static final int TERMINAL_SPEED

32

See Also:

• Constant Field Values

REMOTE_FLOW_CONTROL

public static final int REMOTE_FLOW_CONTROL

33

See Also:

• Constant Field Values

LINEMODE

public static final int LINEMODE

34

See Also:

• Constant Field Values

X_DISPLAY_LOCATION

public static final int X_DISPLAY_LOCATION

35

See Also:

• Constant Field Values

OLD_ENVIRONMENT_VARIABLES

public static final int OLD_ENVIRONMENT_VARIABLES

36

See Also:

• Constant Field Values

AUTHENTICATION

public static final int AUTHENTICATION

37

See Also:

• Constant Field Values

ENCRYPTION

public static final int ENCRYPTION

38

See Also:

• Constant Field Values

NEW_ENVIRONMENT_VARIABLES

public static final int NEW_ENVIRONMENT_VARIABLES

39

See Also:

• Constant Field Values

EXTENDED_OPTIONS_LIST

public static final int EXTENDED_OPTIONS_LIST

255

See Also:

• Constant Field Values

FIRST_OPTION

private static final int FIRST_OPTION

0

See Also:

• Constant Field Values

LAST_OPTION

private static final int LAST_OPTION

255

See Also:

• Constant Field Values

optionString

private static final String[] optionString

Constructor Details

TelnetOption

private TelnetOption()

Cannot be instantiated.

Method Details

getOption

public static final String getOption(int code)

Returns the string representation of the telnet protocol option corresponding to the given option code.

Parameters:

code - The option code of the telnet protocol option

Returns:

The string representation of the telnet protocol option.

isValidOption

public static final boolean isValidOption(int code)

Determines if a given option code is valid. Returns true if valid, false if not.

Parameters:

code - The option code to test.

Returns:

True if the option code is valid, false if not.