javax.jmdns.impl
Class DNSMessage

java.lang.Object
  javax.jmdns.impl.DNSMessage

Direct Known Subclasses:

DNSIncoming, DNSOutgoing

public abstract class DNSMessage
extends Object

DNSMessage define a DNS message either incoming or outgoing.

Author:

Werner Randelshofer, Rick Blair, Pierre Frisch

Field Summary

protected List<DNSRecord>	_additionals
protected List<DNSRecord>	_answers
protected List<DNSRecord>	_authoritativeAnswers
protected List<DNSQuestion>	_questions
static boolean	MULTICAST
static boolean	UNICAST

Constructor Summary

protected

DNSMessage(int flags, int id, boolean multicast)

Method Summary

Collection<? extends DNSRecord>	getAdditionals()
Collection<? extends DNSRecord>	getAllAnswers()
Collection<? extends DNSRecord>	getAnswers()
Collection<? extends DNSRecord>	getAuthorities()
int	getFlags()
int	getId()
int	getNumberOfAdditionals()
int	getNumberOfAnswers()
int	getNumberOfAuthorities()
int	getNumberOfQuestions()
Collection<? extends DNSQuestion>	getQuestions()
boolean	isEmpty() Check if the message is empty
boolean	isMulticast()
boolean	isQuery() Check if the message is a query.
boolean	isResponse() Check if the message is a response.
boolean	isTruncated() Check if the message is truncated.
protected String	print(byte[] data) Debugging.
void	setFlags(int flags)
void	setId(int id)

Methods inherited from class java.lang.Object

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

Field Detail

MULTICAST

public static final boolean MULTICAST

See Also:

Constant Field Values

UNICAST

public static final boolean UNICAST

See Also:

Constant Field Values

_questions

protected final List<DNSQuestion> _questions

_answers

protected final List<DNSRecord> _answers

_authoritativeAnswers

protected final List<DNSRecord> _authoritativeAnswers

_additionals

protected final List<DNSRecord> _additionals

Constructor Detail

DNSMessage

protected DNSMessage(int flags,
                     int id,
                     boolean multicast)

Parameters:

flags -

id -

multicast -

Method Detail

getId

public int getId()

Returns:

message id

setId

public void setId(int id)

Parameters:

id - the id to set

getFlags

public int getFlags()

Returns:

message flags

setFlags

public void setFlags(int flags)

Parameters:

flags - the flags to set

isMulticast

public boolean isMulticast()

Returns:

true if multicast

getQuestions

public Collection<? extends DNSQuestion> getQuestions()

Returns:

list of questions

getNumberOfQuestions

public int getNumberOfQuestions()

Returns:

number of questions in the message

getAllAnswers

public Collection<? extends DNSRecord> getAllAnswers()

getAnswers

public Collection<? extends DNSRecord> getAnswers()

Returns:

list of answers

getNumberOfAnswers

public int getNumberOfAnswers()

Returns:

number of answers in the message

getAuthorities

public Collection<? extends DNSRecord> getAuthorities()

Returns:

list of authorities

getNumberOfAuthorities

public int getNumberOfAuthorities()

Returns:

number of authorities in the message

getAdditionals

public Collection<? extends DNSRecord> getAdditionals()

Returns:

list of additional answers

getNumberOfAdditionals

public int getNumberOfAdditionals()

Returns:

number of additional in the message

isTruncated

public boolean isTruncated()

Check if the message is truncated.

Returns:

true if the message was truncated

isQuery

public boolean isQuery()

Check if the message is a query.

Returns:

true is the message is a query

isResponse

public boolean isResponse()

Check if the message is a response.

Returns:

true is the message is a response

isEmpty

public boolean isEmpty()

Check if the message is empty

Returns:

true is the message is empty

print

protected String print(byte[] data)

Debugging.

Parameters:

data -

Returns:

data dump