com.jscape.inet.dns

Class DnsResponse

java.lang.Object

com.jscape.inet.dns.DnsResponse

All Implemented Interfaces:

java.io.Serializable

public class DnsResponse
extends java.lang.Object
implements java.io.Serializable

Implements the basic functionality of a DNS response.

Example Usage:

 // create new instance
 Dns dns = new Dns();

 // creates DNS request with nameserver and domain as arguments
 DnsRequest request = new DnsRequest("ns.myserver.com","myserver.com");
 // retrieve only MX (mail exchanger) records
 request.setRecordType(Dns.TYPE_MX);

 // gets DNS response
 DnsResponse response = dns.getResponse(request);

 // print out records for response to console

 Enumeration e = response.getAnswers();
 while(e.hasMoreElements()) {
   DnsRecord record = (DnsRecord) e.nextElement();
   System.out.println(record);
 }
 

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DnsResponse() Constructs a new DnsResponse instance.
DnsResponse(DnsRequest request, java.util.Vector answers, java.util.Vector authorities, java.util.Vector additional) Constructs a new DnsResponse instance.

Method Summary

Modifier and Type	Method and Description
java.util.Enumeration	getAdditional() Gets additional information about query.
java.util.Enumeration	getAnswers() Gets answers to query.
java.util.Enumeration	getAuthorities() Gets authoritative nameservers for query.
DnsRequest	getRequest() Gets the DnsRequest used to generated this DnsResponse.
boolean	isAuthoritative() Checks if DNS response was issued by an authoritative DNS nameserver.
boolean	isRecursive() Checks if query response is recursive.
boolean	isTruncated() Checks if query response is truncated.

Methods inherited from class java.lang.Object

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

Constructor Detail

DnsResponse

public DnsResponse()

Constructs a new DnsResponse instance.

DnsResponse

public DnsResponse(DnsRequest request,
                   java.util.Vector answers,
                   java.util.Vector authorities,
                   java.util.Vector additional)

Constructs a new DnsResponse instance.

Parameters:

request - the DnsRequest used to generated this DnsResponse

answers - a Vector of DnsRecord returned in response to DnsRequest

authorities - a Vector of DnsRecord indicating authoritative nameserver(s) for this DnsResponse

additional - a Vector of DnsRecord containing additional information about this DnsResponse

See Also:

DnsRecord, DnsRequest

Method Detail

getAuthorities

public java.util.Enumeration getAuthorities()

Gets authoritative nameservers for query. Returns an Enumeration of DnsRecord.

Returns:

Enumeration of DnsRecord

See Also:

DnsRecord

getAnswers

public java.util.Enumeration getAnswers()

Gets answers to query. Returns an Enumeration of DnsRecord.

Returns:

Enumeration of DnsRecord

See Also:

DnsRecord

getAdditional

public java.util.Enumeration getAdditional()

Gets additional information about query. Returns an Enumeration of DnsRecord.

Returns:

Enumeration of DnsRecord

See Also:

DnsRecord

getRequest

public DnsRequest getRequest()

Gets the DnsRequest used to generated this DnsResponse.

Returns:

a DnsRequest

See Also:

DnsRequest

isAuthoritative

public boolean isAuthoritative()

Checks if DNS response was issued by an authoritative DNS nameserver.

Returns:

true if authoritative false otherwise

isTruncated

public boolean isTruncated()

Checks if query response is truncated.

Returns:

true if reponse is truncated false otherwise

isRecursive

public boolean isRecursive()

Checks if query response is recursive.

Returns:

true if response is recursive false otherwise