private void ReadFixedHeader(byte fixedHeader)
{
_retain = (fixedHeader & 0x01) != 0;
_qosLevel = (QoSLevel)((fixedHeader & 0x06) >> 1);
_dup = (fixedHeader & 0x08) != 0;
_messageType = (MqttMessageType)((fixedHeader & 0xf0) >> 4);
}
public MqttMessage(MqttMessageType messageType, QoSLevel qosLevel, bool retain, bool dup)
{
_qosLevel = qosLevel;
_messageType = messageType;
_retain = retain;
_dup = dup;
}
public MqttMessage(MqttMessageType messageType, QoSLevel qosLevel, bool retain, bool dup)
{
_qosLevel = qosLevel;
_messageType = messageType;
_retain = retain;
_dup = dup;
}
public MqttMessage(string userName, string messageBrokerUserName, string payload, MqttMessageType type)
{
UserName = userName;
MessageBrokerUserName = messageBrokerUserName;
Payload = payload;
Type = type;
}
public static MqttMessage DecodeMessage(byte[] message)
{
byte fixedHeader = message[0];
byte msgType = (byte)(fixedHeader >> 0x04);
MqttMessageType messageType = (MqttMessageType)msgType;
MqttMessage mqttMessage = messageType switch
{
MqttMessageType.CONNECT => new ConnectMessage(),
MqttMessageType.CONNACK => new ConnectAckMessage(),
MqttMessageType.PUBLISH => new PublishMessage(),
MqttMessageType.PUBACK => new PublishAckMessage(),
MqttMessageType.PUBREC => new PublishAckMessage(),
MqttMessageType.PUBREL => new PublishAckMessage(),
MqttMessageType.PUBCOMP => new PublishAckMessage(),
MqttMessageType.SUBSCRIBE => new SubscribeMessage(),
MqttMessageType.SUBACK => new SubscriptionAckMessage(),
MqttMessageType.UNSUBSCRIBE => new UnsubscribeMessage(),
MqttMessageType.UNSUBACK => new UnsubscribeAckMessage(),
MqttMessageType.PINGREQ => new PingRequestMessage(),
MqttMessageType.PINGRESP => new PingResponseMessage(),
MqttMessageType.DISCONNECT => new DisconnectMessage(),
_ => throw new InvalidOperationException("Unknown message type.")
};
mqttMessage.Decode(message);
return(mqttMessage);
}
/// <summary>
/// UnRegisters for the receipt of messages when they arrive.
/// </summary>
/// <param name="msgType">The message type to register for.</param>
/// <param name="msgProcessorCallback">The MSG processor callback.</param>
public void UnRegisterForMessage(MqttMessageType msgType, Func<MqttMessage, bool> msgProcessorCallback)
{
messageProcessorRegistry[msgType].Remove(msgProcessorCallback);
}
/*
* This here class contains some experimental Fluent interface for building
* an MqttHeader. This is a curiosity at the moment.
*/
/// <summary>
/// Sets the type of the message identified in the header.
/// </summary>
/// <param name="messageType">The type of message.</param>
/// <returns>An instance of the header.</returns>
public MqttHeader AsType(MqttMessageType messageType) {
this.MessageType = messageType;
return this;
}
/// <summary>
/// Sets the <see cref="MqttMessageType"/> for this <see cref="MqttMessage"/>.
/// </summary>
/// <param name="messageType"></param>
/// <returns></returns>
public MqttMessage SetMessageType(MqttMessageType messageType)
{
this.messageType = messageType;
return(this);
}
public static MqttMessage DecodeMessage(byte[] message)
{
byte fixedHeader = message[0];
byte msgType = (byte)(fixedHeader >> 0x04);
MqttMessageType messageType = (MqttMessageType)msgType;
MqttMessage mqttMessage = null;
switch (messageType)
{
case MqttMessageType.CONNECT:
mqttMessage = new ConnectMessage();
break;
case MqttMessageType.CONNACK:
mqttMessage = new ConnectAckMessage();
break;
case MqttMessageType.PUBLISH:
mqttMessage = new PublishMessage();
break;
case MqttMessageType.PUBACK:
mqttMessage = new PublishAckMessage();
break;
case MqttMessageType.PUBREC:
mqttMessage = new PublishAckMessage();
break;
case MqttMessageType.PUBREL:
mqttMessage = new PublishAckMessage();
break;
case MqttMessageType.PUBCOMP:
mqttMessage = new PublishAckMessage();
break;
case MqttMessageType.SUBSCRIBE:
mqttMessage = new SubscribeMessage();
break;
case MqttMessageType.SUBACK:
mqttMessage = new SubscriptionAckMessage();
break;
case MqttMessageType.UNSUBSCRIBE:
mqttMessage = new UnsubscribeMessage();
break;
case MqttMessageType.UNSUBACK:
mqttMessage = new UnsubscribeAckMessage();
break;
case MqttMessageType.PINGREQ:
mqttMessage = new PingRequestMessage();
break;
case MqttMessageType.PINGRESP:
mqttMessage = new PingResponseMessage();
break;
case MqttMessageType.DISCONNECT:
mqttMessage = new DisconnectMessage();
break;
default:
throw new InvalidOperationException("Unknown message type.");
}
mqttMessage.Decode(message);
return(mqttMessage);
}
