quamj.qps.util.ntp
Class NtpHeader

java.lang.Object
  |
  +--quamj.qps.util.ntp.NtpHeader

public class NtpHeader

extends java.lang.Object

This class encapsulates the header of a NtpDatagram. See rfc2030 for more details.

Field Summary

static NtpHeader	defaultHeader The default header for a client datagram.
static byte[]	defaultHeaderData The default header data for a client datagram.

Constructor Summary

NtpHeader(byte[] data)
Construct a NtpHeader from a 16 byte array.

Method Summary

byte[]	getData() Gets the 16 byte array constituting the header.
int	getLeapYearIndicator()
int	getMode()
int	getPollInterval()
double	getPrecision() Get precision in milliseconds.
java.lang.Object	getReferenceIdentifier() Gets the reference identifier as an object.
double	getRootDelay() Get root delay in milliseconds.
double	getRootDispersion() Get root dispersion in milliseconds.
int	getStratum()
int	getVersionNumber()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

defaultHeaderData

public static final byte[] defaultHeaderData

The default header data for a client datagram. Version=3, Mode=client.

defaultHeader

public static final NtpHeader defaultHeader

The default header for a client datagram. This is a wrapper around 'defaultHeaderData'

Constructor Detail

NtpHeader

public NtpHeader(byte[] data)

Construct a NtpHeader from a 16 byte array.

Method Detail

getData

public byte[] getData()

Gets the 16 byte array constituting the header.

getLeapYearIndicator

public int getLeapYearIndicator()

getVersionNumber

public int getVersionNumber()

getMode

public int getMode()

getStratum

public int getStratum()

getPollInterval

public int getPollInterval()

getPrecision

public double getPrecision()

Get precision in milliseconds.

getRootDelay

public double getRootDelay()

Get root delay in milliseconds.

getRootDispersion

public double getRootDispersion()

Get root dispersion in milliseconds.

getReferenceIdentifier

public java.lang.Object getReferenceIdentifier()

Gets the reference identifier as an object. It can be either a String, a InetAddress or a 4 byte array. Use 'instanceof' to find out what the true class is.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object