com.antiaction.dns.record
Class DNSRDataA

java.lang.Object
  |
  +--com.antiaction.dns.record.DNSRDataA

All Implemented Interfaces:

java.lang.Cloneable, DNSRDataInterface

public class DNSRDataA

extends java.lang.Object

implements DNSRDataInterface

DNS A Record container. As defined in rfc1035.

Version:

2.00

Author:

Nicholas Clarke

Field Summary

protected java.lang.String	ipAddr IP address.
protected byte[]	ipAddrArr IP record.
protected static int	rtype Record of type A.

Constructor Summary

DNSRDataA()
Instantiate and initialize a default A record object.

Method Summary

byte[]	buildPacket(DNSName dnsname, int globalIdx) Build and return the rdata packet on the internal state.
java.lang.Object	clone() Overrides Cloneable.
void	disassemblePacket(DNSName dnsname, byte[] pDat, int pIdx, int pLen) Parses the rdata part of a record.
int	getDisassembledLen() Returns the length of the previously disassembled rdata part.
java.lang.String	getIPAddr() Get the IP address of this record.
int	getRType() Get the record type.
void	setDebug(boolean b) Toggle debug status.
void	setIPAddr(java.lang.String ip) Validate and set the IP address of this record.
static java.util.ArrayList	Split(java.lang.String str, java.lang.String dstr) Splits a string according to a substring and returns an arraylist where each item represents a string delimited by the substring.
java.lang.String	toString() Returns a string representation of the internal state, mostly for debugging purposes.

Methods inherited from class java.lang.Object

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

Field Detail

rtype

protected static int rtype

Record of type A.

ipAddrArr

protected byte[] ipAddrArr

IP record.

ipAddr

protected java.lang.String ipAddr

IP address.

Constructor Detail

DNSRDataA

public DNSRDataA()

Instantiate and initialize a default A record object.

Method Detail

clone

public java.lang.Object clone()

Overrides Cloneable.

Specified by:

clone in interface DNSRDataInterface

Overrides:

clone in class java.lang.Object

Returns:

a clone of this instance.

Throws:

OutOfMemoryError - if there is not enough memory.

See Also:

Cloneable

setDebug

public void setDebug(boolean b)

Toggle debug status.

Specified by:

setDebug in interface DNSRDataInterface

Parameters:

b - boolean.

buildPacket

public byte[] buildPacket(DNSName dnsname,
                          int globalIdx)
                   throws DNSNameException

Build and return the rdata packet on the internal state.

Specified by:

buildPacket in interface DNSRDataInterface

Parameters:

dnsname - used for domain name compression in the same message.

globalIdx - current index of the message being assembled. (Domain name compression)

Returns:

the rdata part of the message as a byte array.

Throws:

DNSNameException - if the domain name is invalid.

getDisassembledLen

public int getDisassembledLen()

Returns the length of the previously disassembled rdata part.

Specified by:

getDisassembledLen in interface DNSRDataInterface

See Also:

disassemblePacket(DNSName, byte[], int, int)

disassemblePacket

public void disassemblePacket(DNSName dnsname,
                              byte[] pDat,
                              int pIdx,
                              int pLen)
                       throws DNSNameException,
                              DNSRDataException

Parses the rdata part of a record.

Specified by:

disassemblePacket in interface DNSRDataInterface

Parameters:

dnsname - used for domain name compression in the same message.

pDat - array containing the complete packet.

pIdx - index to where in the array the rdata part begins.

pLen - length of the whole packet.

Throws:

DNSRDataException - if the packet is corrupted.

DNSNameException - if the domain name is invalid.

See Also:

getDisassembledLen()

getRType

public int getRType()

Get the record type.

Specified by:

getRType in interface DNSRDataInterface

Returns:

record type.

setIPAddr

public void setIPAddr(java.lang.String ip)
               throws DNSRDataException

Validate and set the IP address of this record.

Parameters:

ip - ip address.

Throws:

DNSRDataException - if the ip address is not valid.

getIPAddr

public java.lang.String getIPAddr()

Get the IP address of this record.

Returns:

the IP address.

toString

public java.lang.String toString()

Returns a string representation of the internal state, mostly for debugging purposes.

Specified by:

toString in interface DNSRDataInterface

Overrides:

toString in class java.lang.Object

Returns:

debug string.

Split

public static java.util.ArrayList Split(java.lang.String str,
                                        java.lang.String dstr)

Splits a string according to a substring and returns an arraylist where each item represents a string delimited by the substring.

Parameters:

str - string to split.

dstr - substring used to split the string.

Returns:

arraylist where each entry represents a string delimited by the subitem.