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

Fields
Modifier and Type	Field	Description
`protected List<DNSRecord>`	`_additionals`
`protected List<DNSRecord>`	`_answers`
`protected List<DNSRecord>`	`_authoritativeAnswers`
`protected List<DNSQuestion>`	`_questions`
`static boolean`	`MULTICAST`
`static boolean`	`UNICAST`

Constructor Summary

Constructors
Modifier Constructor Description

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Collection<? extends DNSRecord>`	`getAdditionals()`
`List<DNSRecord>`	`getAllAnswers()`
`Collection<? extends DNSRecord>`	`getAnswers()`
`Collection<? extends DNSRecord>`	`getAuthorities()`
`int`	`getFlags()`
`int`	`getId()`
`int`	`getNumberOfAdditionals()`
`int`	`getNumberOfAnswers()`
`int`	`getNumberOfAuthorities()`
`int`	`getNumberOfQuestions()`
`int`	`getOperationCode()`	Returns the operation code value.
`Collection<? extends DNSQuestion>`	`getQuestions()`
`boolean`	`isAuthoritativeAnswer()`	Check if the message is an authoritative answer.
`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.
`boolean`	`isValidResponseCode()`	Check is the response code is valid The only valid value is zero all other values signify an error and the message must be ignored.
`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 List<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
  - isValidResponseCode
```
public boolean isValidResponseCode()
```
    Check is the response code is valid
    The only valid value is zero all other values signify an error and the message must be ignored.
    
    Returns:
    
    true if the message has a valid response code.
  - getOperationCode
```
public int getOperationCode()
```
    Returns the operation code value. Currently only standard query 0 is valid.
    
    Returns:
    
    The operation code value.
  - isTruncated
```
public boolean isTruncated()
```
    Check if the message is truncated.
    
    Returns:
    
    true if the message was truncated
  - isAuthoritativeAnswer
```
public boolean isAuthoritativeAnswer()
```
    Check if the message is an authoritative answer.
    
    Returns:
    
    true if the message is an authoritative answer
  - 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

Class DNSMessage

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MULTICAST

UNICAST

_questions

_answers

_authoritativeAnswers

_additionals

Constructor Detail

DNSMessage

Method Detail

getId

setId

getFlags

setFlags

isMulticast

getQuestions

getNumberOfQuestions

getAllAnswers

getAnswers

getNumberOfAnswers

getAuthorities

getNumberOfAuthorities

getAdditionals

getNumberOfAdditionals

isValidResponseCode

getOperationCode

isTruncated

isAuthoritativeAnswer

isQuery

isResponse

isEmpty

print