Package javax.jmdns.impl

Class DNSOutgoing

java.lang.Object

javax.jmdns.impl.DNSMessage

javax.jmdns.impl.DNSOutgoing

public final class DNSOutgoing
extends DNSMessage

An outgoing DNS message.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DNSOutgoing.MessageOutputStream

Field Summary

Fields

Modifier and Type	Field	Description
private final DNSOutgoing.MessageOutputStream	_additionalsAnswersBytes
private final DNSOutgoing.MessageOutputStream	_answersBytes
private final DNSOutgoing.MessageOutputStream	_authoritativeAnswersBytes
private InetSocketAddress	_destination
private int	_maxUDPPayload
(package private) Map<String,Integer>	_names
private final DNSOutgoing.MessageOutputStream	_questionsBytes
private static final int	HEADER_SIZE
static boolean	USE_DOMAIN_NAME_COMPRESSION	This can be used to turn off domain name compression.

Fields inherited from class javax.jmdns.impl.DNSMessage

_additionals, _answers, _authoritativeAnswers, _multicast, _questions, MULTICAST, UNICAST

Constructor Summary

Constructors

Constructor	Description
DNSOutgoing(int flags)	Create an outgoing multicast query or response.
DNSOutgoing(int flags, boolean multicast)	Create an outgoing query or response.
DNSOutgoing(int flags, boolean multicast, int senderUDPPayload)	Create an outgoing query or response.

Method Summary

Modifier and Type	Method	Description
void	addAdditionalAnswer(DNSIncoming in, DNSRecord rec)	Add an additional answer to the record.
void	addAnswer(DNSIncoming in, DNSRecord rec)	Add an answer if it is not suppressed.
void	addAnswer(DNSRecord rec, long now)	Add an answer to the message.
void	addAuthorativeAnswer(DNSRecord rec)	Add an authoritative answer to the message.
void	addQuestion(DNSQuestion rec)	Add a question to the message.
int	availableSpace()	Return the number of byte available in the message.
byte[]	data()	Builds the final message buffer to be send and returns it.
InetSocketAddress	getDestination()	Get the forced destination address if a specific one was set.
int	getMaxUDPPayload()
(package private) String	print(boolean dump)	Debugging.
void	setDestination(InetSocketAddress destination)	Force a specific destination address if packet is sent.
String	toString()

Methods inherited from class javax.jmdns.impl.DNSMessage

getAdditionals, getAllAnswers, getAnswers, getAuthorities, getFlags, getId, getNumberOfAdditionals, getNumberOfAnswers, getNumberOfAuthorities, getNumberOfQuestions, getOperationCode, getQuestions, isAuthoritativeAnswer, isEmpty, isMulticast, isQuery, isResponse, isTruncated, isValidResponseCode, print, print, setFlags, setId

Methods inherited from class java.lang.Object

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

Field Details

USE_DOMAIN_NAME_COMPRESSION

public static boolean USE_DOMAIN_NAME_COMPRESSION

This can be used to turn off domain name compression. This was helpful for tracking problems interacting with other mdns implementations.

_names

Map<String,Integer> _names

_maxUDPPayload

private int _maxUDPPayload

_questionsBytes

private final DNSOutgoing.MessageOutputStream _questionsBytes

_answersBytes

private final DNSOutgoing.MessageOutputStream _answersBytes

_authoritativeAnswersBytes

private final DNSOutgoing.MessageOutputStream _authoritativeAnswersBytes

_additionalsAnswersBytes

private final DNSOutgoing.MessageOutputStream _additionalsAnswersBytes

HEADER_SIZE

private static final int HEADER_SIZE

See Also:

• Constant Field Values

_destination

private InetSocketAddress _destination

Constructor Details

DNSOutgoing

public DNSOutgoing(int flags)

Create an outgoing multicast query or response.

Parameters:

flags -

DNSOutgoing

public DNSOutgoing(int flags,
 boolean multicast)

Create an outgoing query or response.

Parameters:

flags -

multicast -

DNSOutgoing

public DNSOutgoing(int flags,
 boolean multicast,
 int senderUDPPayload)

Create an outgoing query or response.

Parameters:

flags -

multicast -

senderUDPPayload - The sender's UDP payload size is the number of bytes of the largest UDP payload that can be reassembled and delivered in the sender's network stack.

Method Details

getDestination

public InetSocketAddress getDestination()

Get the forced destination address if a specific one was set.

Returns:

a forced destination address or null if no address is forced.

setDestination

public void setDestination(InetSocketAddress destination)

Force a specific destination address if packet is sent.

Parameters:

destination - Set a destination address a packet should be sent to (instead the default one). You could use null to unset the forced destination.

availableSpace

public int availableSpace()

Return the number of byte available in the message.

Returns:

available space

addQuestion

public void addQuestion(DNSQuestion rec)
                 throws IOException

Add a question to the message.

Parameters:

rec -

Throws:

IOException

addAnswer

public void addAnswer(DNSIncoming in,
 DNSRecord rec)
               throws IOException

Add an answer if it is not suppressed.

Parameters:

in -

rec -

Throws:

IOException

addAnswer

public void addAnswer(DNSRecord rec,
 long now)
               throws IOException

Add an answer to the message.

Parameters:

rec -

now -

Throws:

IOException

addAuthorativeAnswer

public void addAuthorativeAnswer(DNSRecord rec)
                          throws IOException

Add an authoritative answer to the message.

Parameters:

rec -

Throws:

IOException

addAdditionalAnswer

public void addAdditionalAnswer(DNSIncoming in,
 DNSRecord rec)
                         throws IOException

Add an additional answer to the record. Omit if there is no room.

Parameters:

in -

rec -

Throws:

IOException

data

public byte[] data()

Builds the final message buffer to be send and returns it.

Returns:

bytes to send.

print

String print(boolean dump)

Debugging.

toString

public String toString()

Overrides:

toString in class Object

getMaxUDPPayload

public int getMaxUDPPayload()

Returns:

the maxUDPPayload