com.prosysopc.ua.stack.transport.tcp.io

Class SequenceNumber

java.lang.Object

com.prosysopc.ua.stack.transport.tcp.io.SequenceNumber

public class SequenceNumber
extends Object

Secure Channel sequence number

Constructor Summary

Constructors

Constructor and Description
SequenceNumber()

Method Summary

Modifier and Type	Method and Description
int	getCurrentSendSequenceNumber() getCurrentSendSequenceNumber.
Integer	getNextRecvSequenceNumber() Get next recv sequence number
int	getNextSendSequencenumber() Get the next send sequence number.
Integer	getRecvSequenceNumber() Get current recv sequence number
boolean	hasRecvSequenceNumber() Check whether recv sequence number has been set.
void	setCurrentSendSequenceNumber(int newValue) setCurrentSendSequenceNumber.
void	setRecvSequenceNumber(int value) Setter for the field recvSequenceNumber.
boolean	testAndSetRecvSequencenumber(int newValue) Tests whether value matches expected sequence number and sets a new value.

Methods inherited from class java.lang.Object

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

Constructor Detail

SequenceNumber

public SequenceNumber()

Method Detail

getCurrentSendSequenceNumber

public int getCurrentSendSequenceNumber()

getCurrentSendSequenceNumber.

Returns:

a int.

getNextRecvSequenceNumber

public Integer getNextRecvSequenceNumber()

Get next recv sequence number

Returns:

recv number or null

getNextSendSequencenumber

public int getNextSendSequencenumber()

Get the next send sequence number. Send sequence number wraps between 4294966271 and 4294967295 to a new value that is below 1024.

Returns:

send sequnce numner.

getRecvSequenceNumber

public Integer getRecvSequenceNumber()

Get current recv sequence number

Returns:

recv number or null

hasRecvSequenceNumber

public boolean hasRecvSequenceNumber()

Check whether recv sequence number has been set.

Returns:

true if setRecvSequenceNumber has been called

setCurrentSendSequenceNumber

public void setCurrentSendSequenceNumber(int newValue)

setCurrentSendSequenceNumber.

Parameters:

newValue - a int.

setRecvSequenceNumber

public void setRecvSequenceNumber(int value)

Setter for the field recvSequenceNumber.

Parameters:

value - a int.

testAndSetRecvSequencenumber

public boolean testAndSetRecvSequencenumber(int newValue)

Tests whether value matches expected sequence number and sets a new value. If value has never been set before the test passes and new value is set. Test passes if the value is one larger than previous value or if previous value is 4294966271 or larger.

Parameters:

newValue - a int.

Returns:

true if value matches