org.pcap4j.packet

Class DnsPacket

java.lang.Object

org.pcap4j.packet.AbstractPacket

org.pcap4j.packet.DnsPacket

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<Packet>, Packet

public final class DnsPacket
extends AbstractPacket

DNS packet.

Since:

pcap4j 1.7.1

Author:

Kaito Yamada

See Also:

RFC 1035, DNS Header Flags, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DnsPacket.Builder
static class	DnsPacket.DnsHeader DNS header +---------------------+ | Header | +---------------------+ | Question | the question for the name server +---------------------+ | Answer | RRs answering the question +---------------------+ | Authority | RRs pointing toward an authority +---------------------+ | Additional | RRs holding additional information +---------------------+ Header: 1 1 1 1 1 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | ID | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |QR| Opcode |AA|TC|RD|RA| Z|AD|CD| RCODE | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | QDCOUNT | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | ANCOUNT | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | NSCOUNT | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | ARCOUNT | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

Nested classes/interfaces inherited from class org.pcap4j.packet.AbstractPacket

AbstractPacket.AbstractBuilder, AbstractPacket.AbstractHeader

Nested classes/interfaces inherited from interface org.pcap4j.packet.Packet

Packet.Header

Method Summary

Modifier and Type	Method and Description
DnsPacket.Builder	getBuilder() Returns a new Builder object populated with this object's fields' values.
DnsPacket.DnsHeader	getHeader() Returns the Header object representing this packet's header.
static DnsPacket	newPacket(byte[] rawData, int offset, int length) A static factory method.

Methods inherited from class org.pcap4j.packet.AbstractPacket

buildHexString, buildRawData, buildString, calcHashCode, calcLength, equals, getPayload, getRawData, hashCode, length, toHexString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.pcap4j.packet.Packet

contains, get, getOuterOf, iterator

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

newPacket

public static DnsPacket newPacket(byte[] rawData,
                                  int offset,
                                  int length)
                           throws IllegalRawDataException

A static factory method. This method validates the arguments by ByteArrays.validateBounds(byte[], int, int), which may throw exceptions undocumented here.

Parameters:

rawData - rawData

offset - offset

length - length

Returns:

a new DnsPacket object.

Throws:

IllegalRawDataException - if parsing the raw data fails.

getHeader

public DnsPacket.DnsHeader getHeader()

Description copied from class: AbstractPacket

Returns the Header object representing this packet's header. This subclass have to override this method if the packet represented by the subclass has a header.

Specified by:

getHeader in interface Packet

Overrides:

getHeader in class AbstractPacket

Returns:

the Header object representing this packet's header. May be null if the header doesn't exist

getBuilder

public DnsPacket.Builder getBuilder()

Description copied from interface: Packet

Returns a new Builder object populated with this object's fields' values.

Specified by:

getBuilder in interface Packet

Specified by:

getBuilder in class AbstractPacket

Returns:

a new Builder object populated with this object's fields values