Package io.netty.handler.codec.dns

Class AbstractDnsOptPseudoRrRecord

java.lang.Object

io.netty.handler.codec.dns.AbstractDnsRecord

io.netty.handler.codec.dns.AbstractDnsOptPseudoRrRecord

All Implemented Interfaces:

DnsOptPseudoRecord, DnsRecord

Direct Known Subclasses:

DefaultDnsOptEcsRecord

public abstract class AbstractDnsOptPseudoRrRecord
extends AbstractDnsRecord
implements DnsOptPseudoRecord

An OPT RR record. This is used for Extension Mechanisms for DNS (EDNS(0)).

Field Summary

Fields inherited from interface io.netty.handler.codec.dns.DnsRecord

CLASS_ANY, CLASS_CHAOS, CLASS_CSNET, CLASS_HESIOD, CLASS_IN, CLASS_NONE

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractDnsOptPseudoRrRecord(int maxPayloadSize)
protected	AbstractDnsOptPseudoRrRecord(int maxPayloadSize, int extendedRcode, int version)
protected	AbstractDnsOptPseudoRrRecord(int maxPayloadSize, int extendedRcode, int version, int flags)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
int	extendedRcode()	Returns the EXTENDED-RCODE which is encoded into DnsRecord.timeToLive().
int	flags()	Returns the 16-bit flags field which is encoded into the lower 16 bits of DnsRecord.timeToLive(), as laid out by RFC 6891.
String	toString()
int	version()	Returns the VERSION which is encoded into DnsRecord.timeToLive().

Methods inherited from class io.netty.handler.codec.dns.AbstractDnsRecord

dnsClass, equals, hashCode, name, timeToLive, type

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.netty.handler.codec.dns.DnsRecord

dnsClass, name, timeToLive, type

Constructor Detail

AbstractDnsOptPseudoRrRecord

protected AbstractDnsOptPseudoRrRecord(int maxPayloadSize,
                                       int extendedRcode,
                                       int version)

AbstractDnsOptPseudoRrRecord

protected AbstractDnsOptPseudoRrRecord(int maxPayloadSize,
                                       int extendedRcode,
                                       int version,
                                       int flags)

Creates a new instance.

Parameters:

maxPayloadSize - the maximum UDP payload size that can be reassembled and delivered by this endpoint's network stack, encoded into the CLASS field

extendedRcode - the upper 8 bits of the extended 12-bit RCODE; the lower 4 bits are carried by the DNS message header

version - the EDNS version

flags - the 16-bit flags field, which holds DO and Z; only its low 16 bits are used

AbstractDnsOptPseudoRrRecord

protected AbstractDnsOptPseudoRrRecord(int maxPayloadSize)

Method Detail

extendedRcode

public int extendedRcode()

Description copied from interface: DnsOptPseudoRecord

Returns the EXTENDED-RCODE which is encoded into DnsRecord.timeToLive().

Specified by:

extendedRcode in interface DnsOptPseudoRecord

version

public int version()

Description copied from interface: DnsOptPseudoRecord

Returns the VERSION which is encoded into DnsRecord.timeToLive().

Specified by:

version in interface DnsOptPseudoRecord

flags

public int flags()

Description copied from interface: DnsOptPseudoRecord

Returns the 16-bit flags field which is encoded into the lower 16 bits of DnsRecord.timeToLive(), as laid out by RFC 6891.

DO, defined by RFC 3225, is the most significant bit of that field, so (flags() & 0x8000) != 0 tests for DNSSEC OK. Further bits are assigned by the IANA EDNS Header Flags registry; the remaining bits are Z, which senders set to zero and receivers ignore.

Specified by:

flags in interface DnsOptPseudoRecord

toString

public String toString()

Overrides:

toString in class AbstractDnsRecord