ru.dz.mqtt_udp.proto

Class TaggedTailRecord

java.lang.Object

ru.dz.mqtt_udp.proto.TaggedTailRecord

Direct Known Subclasses:

TTR_AbstractInteger32, TTR_AbstractInteger64, TTR_Invalid, TTR_Signature

public abstract class TaggedTailRecord
extends Object

Protocol extension. See https://github.com/dzavalishin/mqtt_udp/wiki/Tagged-Tail

Author:

dz

Field Summary

Fields

Modifier and Type	Field and Description
protected int	rawLength
protected byte	tag

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TaggedTailRecord(byte tag, int rawLngth)

Method Summary

Modifier and Type	Method and Description
static TaggedTailRecord	fromBytes(byte[] raw)
static Collection<TaggedTailRecord>	fromBytesAll(byte[] raw, AtomicReference<Integer> signaturePos) Decode tail of packet, all the attached TTRs.
int	getRawLength()
byte	getTag()
static int	htonl(int value)
abstract byte[]	toBytes() Convert this record to bytes to send out.
static byte[]	toBytes(byte tag, byte[] data) Used by subclasses to encode selves.

Methods inherited from class java.lang.Object

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

Field Detail

rawLength

protected final int rawLength

tag

protected final byte tag

Constructor Detail

TaggedTailRecord

protected TaggedTailRecord(byte tag,
                           int rawLngth)

Method Detail

getRawLength

public int getRawLength()

getTag

public byte getTag()

fromBytesAll

public static Collection<TaggedTailRecord> fromBytesAll(byte[] raw,
                                                        AtomicReference<Integer> signaturePos)

Decode tail of packet, all the attached TTRs.

Finds out and returns position of Signature TTR, so that outside code can check if packet signed ok. Outside code must calculate signature locally for part of the packet preceding signature TTR. Including, of course, classic MQTT packet part.

Parameters:

raw - Tail of the packet, everything after the classic MQTT payload size.

signaturePos - (Return!) Position of signature TTR in raw.

Returns:

Collection of TTRs discovered.

fromBytes

public static TaggedTailRecord fromBytes(byte[] raw)

toBytes

public abstract byte[] toBytes()

Convert this record to bytes to send out.

Returns:

binary representation.

toBytes

public static byte[] toBytes(byte tag,
                             byte[] data)

Used by subclasses to encode selves.

Parameters:

tag - Tag of record.

data - Data to put

Returns:

Complete binary representation to attach to packet and send.

htonl

public static int htonl(int value)