/// <summary>
/// Subscribe for message topics
/// </summary>
/// <param name="topics">List of topics to subscribe</param>
/// <param name="qosLevels">QOS levels related to topics</param>
/// <returns>Granted QoS Levels in SUBACK message from broker</returns>
public byte[] Subscribe(string[] topics, byte[] qosLevels)
{
int attempts = 0;
bool acknowledged = false;
MqttMsgSubscribe subscribe =
new MqttMsgSubscribe(topics, qosLevels);
MqttMsgSuback suback = null;
do
{
try
{
// try subscribe
suback = (MqttMsgSuback)this.SendReceive(subscribe.GetBytes());
acknowledged = true;
}
catch (MqttTimeoutException)
{
// no SUBACK message received in time, retry with duplicate flag
attempts++;
subscribe.DupFlag = true;
// delay before retry
if (attempts < MQTT_ATTEMPTS_RETRY)
{
Thread.Sleep(MQTT_DELAY_RETRY);
}
}
} while ((attempts < MQTT_ATTEMPTS_RETRY) && !acknowledged);
// return granted QoS Levels or null
return(acknowledged ? suback.GrantedQoSLevels : null);
}
public static MqttMsgSuback BuildSubAck(ushort messageId, byte[] qosLevels)
{
MqttMsgSuback subAck = new MqttMsgSuback();
subAck.MessageId = messageId;
subAck.GrantedQoSLevels = qosLevels;
return(subAck);
}
/// <summary>
/// Wrapper method for raising subscribed topic event (SUBACK message)
/// </summary>
/// <param name="suback">SUBACK message received</param>
private void OnMqttMsgSubscribed(MqttMsgSuback suback)
{
if (this.MqttMsgSubscribed != null)
{
this.MqttMsgSubscribed(this,
new MqttMsgSubscribedEventArgs(suback.MessageId, suback.GrantedQoSLevels));
}
}
public static void Suback(MqttClientConnection clientConnection, ushort messageId, byte[] grantedQosLevels)
{
MqttMsgSuback suback = new MqttMsgSuback();
suback.MessageId = messageId;
suback.GrantedQoSLevels = grantedQosLevels;
Send(clientConnection, suback);
}
public void SubackBasicDecodingTestsv311()
{
// Arrange
byte[] encodedCorrect = new byte[] { 4, 0, 42, 1, 2 };
MokChannel mokChannel = new MokChannel(encodedCorrect);
// Act
MqttMsgSuback suback = MqttMsgSuback.Parse(144, MqttProtocolVersion.Version_3_1_1, mokChannel);
// Assert
Assert.Equal((ushort)42, suback.MessageId);
Assert.Equal(suback.GrantedQoSLevels, new MqttQoSLevel[] { MqttQoSLevel.AtLeastOnce, MqttQoSLevel.ExactlyOnce });
}
public void SubackBasicDecodingTestsv5()
{
// Arrange
byte[] encodedCorrect = new byte[] { 5, 0, 42, 0, 1, 2 };
MokChannel mokChannel = new MokChannel(encodedCorrect);
// Act
MqttMsgSuback suback = MqttMsgSuback.Parse(144, MqttProtocolVersion.Version_5, mokChannel);
// Assert
Assert.Equal((ushort)42, suback.MessageId);
Assert.Equal(suback.GrantedQoSLevels, new MqttQoSLevel[] { MqttQoSLevel.AtLeastOnce, MqttQoSLevel.ExactlyOnce });
Assert.Equal(suback.ReasonCodes, new MqttReasonCode[] { MqttReasonCode.GrantedQoS1, MqttReasonCode.GrantedQoS2 });
// And this should work as well as it's value comparison
Assert.Equal(suback.GrantedQoSLevels, new MqttReasonCode[] { MqttReasonCode.GrantedQoS1, MqttReasonCode.GrantedQoS2 });
}
public void SubackAdvancedDecodingTestsv5()
{
// Arrange
byte[] encodedCorrect = new byte[] { 93, 0, 42, 87, 31, 0, 49, 84, 104, 105, 115, 32, 105, 115, 32, 97, 32, 103, 111, 111, 100, 32, 114,
101, 97, 115, 111, 110, 58, 32, 121, 111, 117, 114, 32, 97, 114, 101, 32, 110, 111, 116, 32, 97, 117, 116,
104, 111, 114, 105, 122, 101, 100, 33, 33, 33, 38, 0, 4, 80, 114, 111, 112, 0, 26, 111, 110, 108, 121, 32,
111, 110, 101, 32, 116, 104, 105, 115, 32, 116, 105, 109, 101, 32, 102, 111, 114, 32, 102, 117, 110, 1,
2, 135 };
MokChannel mokChannel = new MokChannel(encodedCorrect);
// Act
MqttMsgSuback suback = MqttMsgSuback.Parse(144, MqttProtocolVersion.Version_5, mokChannel);
// Assert
Assert.Equal((ushort)42, suback.MessageId);
Assert.Equal(suback.GrantedQoSLevels, new MqttQoSLevel[] { MqttQoSLevel.AtLeastOnce, MqttQoSLevel.ExactlyOnce, (MqttQoSLevel)MqttReasonCode.NotAuthorized });
Assert.Equal(suback.ReasonCodes, new MqttReasonCode[] { MqttReasonCode.GrantedQoS1, MqttReasonCode.GrantedQoS2, MqttReasonCode.NotAuthorized });
// And this should work as well as it's value comparison
Assert.Equal(suback.GrantedQoSLevels, new MqttReasonCode[] { MqttReasonCode.GrantedQoS1, MqttReasonCode.GrantedQoS2, MqttReasonCode.NotAuthorized });
var prop = new UserProperty("Prop", "only one this time for fun");
Assert.Equal(((UserProperty)suback.UserProperties[0]).Name, prop.Name);
Assert.Equal(((UserProperty)suback.UserProperties[0]).Value, prop.Value);
}
public static MqttMsgBase DecodeControlPacket(byte[] data)
{
byte fixedHeaderFirstByte = (byte)(data[0] >> MqttMsgBase.MSG_TYPE_OFFSET);
switch (fixedHeaderFirstByte)
{
case MqttMsgBase.MQTT_MSG_CONNECT_TYPE:
{
return(MqttMsgConnect.Parse(data));
}
case MqttMsgBase.MQTT_MSG_CONNACK_TYPE:
{
return(MqttMsgConnack.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBLISH_TYPE:
{
return(MqttMsgPublish.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBACK_TYPE:
{
return(MqttMsgPuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBREC_TYPE:
{
return(MqttMsgPubrec.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBREL_TYPE:
{
return(MqttMsgPubrel.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBCOMP_TYPE:
{
return(MqttMsgPubcomp.Parse(data));
}
case MqttMsgBase.MQTT_MSG_SUBSCRIBE_TYPE:
{
return(MqttMsgSubscribe.Parse(data));
}
case MqttMsgBase.MQTT_MSG_SUBACK_TYPE:
{
return(MqttMsgSuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_UNSUBSCRIBE_TYPE:
{
return(MqttMsgUnsubscribe.Parse(data));
}
case MqttMsgBase.MQTT_MSG_UNSUBACK_TYPE:
{
return(MqttMsgUnsuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PINGREQ_TYPE:
{
return(MqttMsgPingReq.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PINGRESP_TYPE:
{
return(MqttMsgPingResp.Parse(data));
}
case MqttMsgBase.MQTT_MSG_DISCONNECT_TYPE:
{
CrestronLogger.WriteToLog("PACKETDECODER - Riconosciuto DISCONNNECT: ", 1);
return(MqttMsgDisconnect.Parse(data));
}
default:
{
throw new FormatException();
}
}
}
/// <summary>
/// Thread for receiving messages from broker
/// </summary>
private void ReceiveThread()
{
int readBytes;
byte[] fixedHeaderFirstByte = new byte[1];
byte msgType;
while (this.isRunning)
{
try
{
// read first byte (fixed header)
readBytes = this.socket.Receive(fixedHeaderFirstByte);
if (readBytes > 0)
{
// extract message type from received byte
msgType = (byte)((fixedHeaderFirstByte[0] & MqttMsgBase.MSG_TYPE_MASK) >> MqttMsgBase.MSG_TYPE_OFFSET);
switch (msgType)
{
// impossible, broker can't send CONNECT message
case MqttMsgBase.MQTT_MSG_CONNECT_TYPE:
throw new MqttClientException(MqttClientErrorCode.WrongBrokerMessage);
// CONNACK message received from broker
case MqttMsgBase.MQTT_MSG_CONNACK_TYPE:
this.msgReceived = MqttMsgConnack.Parse(fixedHeaderFirstByte[0], this.socket);
this.endReceiving.Set();
break;
// impossible, broker can't send PINGREQ message
case MqttMsgBase.MQTT_MSG_PINGREQ_TYPE:
throw new MqttClientException(MqttClientErrorCode.WrongBrokerMessage);
// CONNACK message received from broker
case MqttMsgBase.MQTT_MSG_PINGRESP_TYPE:
this.msgReceived = MqttMsgPingResp.Parse(fixedHeaderFirstByte[0], this.socket);
this.endReceiving.Set();
break;
// impossible, broker can't send SUBSCRIBE message
case MqttMsgBase.MQTT_MSG_SUBSCRIBE_TYPE:
throw new MqttClientException(MqttClientErrorCode.WrongBrokerMessage);
// SUBACK message received from broker
case MqttMsgBase.MQTT_MSG_SUBACK_TYPE:
this.msgReceived = MqttMsgSuback.Parse(fixedHeaderFirstByte[0], this.socket);
this.endReceiving.Set();
// raise subscribed topic event (SUBACK message received)
this.OnMqttMsgSubscribed((MqttMsgSuback)this.msgReceived);
break;
// PUBLISH message received from broker
case MqttMsgBase.MQTT_MSG_PUBLISH_TYPE:
MqttMsgPublish msgReceived = MqttMsgPublish.Parse(fixedHeaderFirstByte[0], this.socket);
// for QoS Level 1 and 2, client sends PUBACK message to broker
if ((this.msgReceived.QosLevel == MqttMsgBase.QOS_LEVEL_AT_LEAST_ONCE) ||
(this.msgReceived.QosLevel == MqttMsgBase.QOS_LEVEL_EXACTLY_ONCE))
{
MqttMsgPuback puback = new MqttMsgPuback();
puback.MessageId = (msgReceived).MessageId;
this.Send(puback.GetBytes());
}
// raise PUBLISH message received event
this.OnMqttMsgPublishReceived(msgReceived);
break;
// PUBACK message received from broker
case MqttMsgBase.MQTT_MSG_PUBACK_TYPE:
this.msgReceived = MqttMsgPuback.Parse(fixedHeaderFirstByte[0], this.socket);
this.endReceiving.Set();
// raise published message event
// (PUBACK received for QoS Level 1)
this.OnMqttMsgPublished(((MqttMsgPuback)this.msgReceived).MessageId);
break;
// PUBREC message received from broker
case MqttMsgBase.MQTT_MSG_PUBREC_TYPE:
this.msgReceived = MqttMsgPubrec.Parse(fixedHeaderFirstByte[0], this.socket);
this.endReceiving.Set();
break;
// impossible, broker can't send PUBREL message
case MqttMsgBase.MQTT_MSG_PUBREL_TYPE:
throw new MqttClientException(MqttClientErrorCode.WrongBrokerMessage);
// PUBCOMP message received from broker
case MqttMsgBase.MQTT_MSG_PUBCOMP_TYPE:
this.msgReceived = MqttMsgPubcomp.Parse(fixedHeaderFirstByte[0], this.socket);
this.endReceiving.Set();
// raise published message event
// (PUBCOMP received for QoS Level 2)
this.OnMqttMsgPublished(((MqttMsgPuback)this.msgReceived).MessageId);
break;
// impossible, broker can't send UNSUBSCRIBE message
case MqttMsgBase.MQTT_MSG_UNSUBSCRIBE_TYPE:
throw new MqttClientException(MqttClientErrorCode.WrongBrokerMessage);
// UNSUBACK message received from broker
case MqttMsgBase.MQTT_MSG_UNSUBACK_TYPE:
this.msgReceived = MqttMsgUnsuback.Parse(fixedHeaderFirstByte[0], this.socket);
this.endReceiving.Set();
// raise unsubscribed topic event
this.OnMqttMsgUnsubscribed(((MqttMsgUnsuback)this.msgReceived).MessageId);
break;
default:
throw new MqttClientException(MqttClientErrorCode.WrongBrokerMessage);
}
this.exReceiving = null;
}
}
catch (Exception)
{
this.exReceiving = new MqttCommunicationException();
}
}
}
public MqttMsgBase DecodeControlPacket(byte[] data)
{
byte fixedHeaderFirstByte = (byte)(data[0] >> MSG_TYPE_OFFSET);
switch (fixedHeaderFirstByte)
{
case MqttMsgBase.MQTT_MSG_CONNECT_TYPE:
{
return(MqttMsgConnect.Parse(data));
}
case MqttMsgBase.MQTT_MSG_CONNACK_TYPE:
{
return(MqttMsgConnack.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBLISH_TYPE:
{
return(MqttMsgPublish.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBACK_TYPE:
{
return(MqttMsgPuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBREC_TYPE:
{
return(MqttMsgPubrec.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBREL_TYPE:
{
return(MqttMsgPubrel.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBCOMP_TYPE:
{
return(MqttMsgPubcomp.Parse(data));
}
case MqttMsgBase.MQTT_MSG_SUBSCRIBE_TYPE:
{
return(MqttMsgSubscribe.Parse(data));
}
case MqttMsgBase.MQTT_MSG_SUBACK_TYPE:
{
return(MqttMsgSuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_UNSUBSCRIBE_TYPE:
{
return(MqttMsgUnsubscribe.Parse(data));
}
case MqttMsgBase.MQTT_MSG_UNSUBACK_TYPE:
{
return(MqttMsgUnsuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PINGREQ_TYPE:
{
return(MqttMsgPingReq.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PINGRESP_TYPE:
{
return(MqttMsgPingResp.Parse(data));
}
case MqttMsgBase.MQTT_MSG_DISCONNECT_TYPE:
{
return(MqttMsgDisconnect.Parse(data));
}
default:
{
throw new FormatException(" First byte shifted : " + fixedHeaderFirstByte);
}
}
}
private void OnMqttMsgSubscribed(MqttConnection connection, MqttMsgSuback suback)
{
}
private void HandleSUBACKype(MqttMsgSuback mqttMsgSuback)
{
CrestronLogger.WriteToLog("MQTTCLIENT - HANDLESUBACK -", 6);
}
public MqttMsgBase DecodeControlPacket(byte[] data)
{
#if PACKET_DEBUG
CrestronLogger.WriteToLog("MQTTCLIENT - RECEIVE - " + BitConverter.ToString(data), 2);
#endif
byte fixedHeaderFirstByte = (byte)(data[0] >> MSG_TYPE_OFFSET);
switch (fixedHeaderFirstByte)
{
case MqttMsgBase.MQTT_MSG_CONNECT_TYPE:
{
return(MqttMsgConnect.Parse(data));
}
case MqttMsgBase.MQTT_MSG_CONNACK_TYPE:
{
return(MqttMsgConnack.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBLISH_TYPE:
{
return(MqttMsgPublish.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBACK_TYPE:
{
return(MqttMsgPuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBREC_TYPE:
{
return(MqttMsgPubrec.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBREL_TYPE:
{
return(MqttMsgPubrel.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PUBCOMP_TYPE:
{
return(MqttMsgPubcomp.Parse(data));
}
case MqttMsgBase.MQTT_MSG_SUBSCRIBE_TYPE:
{
return(MqttMsgSubscribe.Parse(data));
}
case MqttMsgBase.MQTT_MSG_SUBACK_TYPE:
{
return(MqttMsgSuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_UNSUBSCRIBE_TYPE:
{
return(MqttMsgUnsubscribe.Parse(data));
}
case MqttMsgBase.MQTT_MSG_UNSUBACK_TYPE:
{
return(MqttMsgUnsuback.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PINGREQ_TYPE:
{
return(MqttMsgPingReq.Parse(data));
}
case MqttMsgBase.MQTT_MSG_PINGRESP_TYPE:
{
return(MqttMsgPingResp.Parse(data));
}
case MqttMsgBase.MQTT_MSG_DISCONNECT_TYPE:
{
return(MqttMsgDisconnect.Parse(data));
}
default:
{
throw new FormatException(" First byte shifted : " + fixedHeaderFirstByte);
}
}
}
private static void OnMqttMsgSubscribed(MqttClientConnection clientConnection, MqttMsgSuback suback)
{
}
