org.xbill.DNS
Class OPTRecord

java.lang.Object
  org.xbill.DNS.Record
      org.xbill.DNS.OPTRecord

All Implemented Interfaces:

Cloneable, Comparable

public class OPTRecord
extends Record

Options - describes Extended DNS (EDNS) properties of a Message. No specific options are defined other than those specified in the header. An OPT should be generated by Resolver. EDNS is a method to extend the DNS protocol while providing backwards compatibility and not significantly changing the protocol. This implementation of EDNS is mostly complete at level 0.

Author:

Brian Wellington

See Also:

Message, Resolver

Nested Class Summary

static class

OPTRecord.Option

Field Summary

Fields inherited from class org.xbill.DNS.Record

dclass, name, ttl, type

Constructor Summary

OPTRecord(int payloadSize, int xrcode, int version)
Creates an OPT Record with no data.

OPTRecord(int payloadSize, int xrcode, int version, int flags)
Creates an OPT Record with no data.

OPTRecord(int payloadSize, int xrcode, int version, int flags, List options)
Creates an OPT Record.

Method Summary

int	getExtendedRcode() Returns the extended Rcode
int	getFlags() Returns the EDNS flags
List	getOptions() Gets all options in the OPTRecord.
List	getOptions(int code) Gets all options in the OPTRecord with a specific code.
int	getPayloadSize() Returns the maximum allowed payload size.
int	getVersion() Returns the highest supported EDNS version

Methods inherited from class org.xbill.DNS.Record

byteArrayFromString, byteArrayToString, compareTo, equals, fromString, fromString, fromWire, getAdditionalName, getDClass, getName, getRRsetType, getTTL, getType, hashCode, newRecord, newRecord, newRecord, newRecord, rdataToString, rdataToWireCanonical, sameRRset, toString, toWire, toWireCanonical, unknownToString, withName

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

OPTRecord

public OPTRecord(int payloadSize,
                 int xrcode,
                 int version,
                 int flags,
                 List options)

Creates an OPT Record. This is normally called by SimpleResolver, but can also be called by a server.

Parameters:

payloadSize - The size of a packet that can be reassembled on the sending host.

xrcode - The value of the extended rcode field. This is the upper 16 bits of the full rcode.

flags - Additional message flags.

version - The EDNS version that this DNS implementation supports. This should be 0 for dnsjava.

options - The list of options that comprise the data field. There are currently no defined options.

See Also:

ExtendedFlags

OPTRecord

public OPTRecord(int payloadSize,
                 int xrcode,
                 int version,
                 int flags)

Creates an OPT Record with no data. This is normally called by SimpleResolver, but can also be called by a server.

Parameters:

payloadSize - The size of a packet that can be reassembled on the sending host.

xrcode - The value of the extended rcode field. This is the upper 16 bits of the full rcode.

flags - Additional message flags.

version - The EDNS version that this DNS implementation supports. This should be 0 for dnsjava.

See Also:

ExtendedFlags

OPTRecord

public OPTRecord(int payloadSize,
                 int xrcode,
                 int version)

Creates an OPT Record with no data. This is normally called by SimpleResolver, but can also be called by a server.

Method Detail

getPayloadSize

public int getPayloadSize()

Returns the maximum allowed payload size.

getExtendedRcode

public int getExtendedRcode()

Returns the extended Rcode

See Also:

Rcode

getVersion

public int getVersion()

Returns the highest supported EDNS version

getFlags

public int getFlags()

Returns the EDNS flags

getOptions

public List getOptions()

Gets all options in the OPTRecord. This returns a list of Options.

getOptions

public List getOptions(int code)

Gets all options in the OPTRecord with a specific code. This returns a list of byte arrays.