public void ConnecAdvancedDecodeTestv5()
{
// Arrange
byte[] correctEncoded = new byte[] { 122, 0, 4, 77, 81, 84, 84, 5, 246, 4, 210, 41, 21, 0, 10, 87, 111, 119, 111, 44, 32, 99, 111, 111, 108,
22, 0, 5, 0, 1, 2, 3, 4, 17, 0, 0, 212, 49, 33, 255, 105, 39, 255, 255, 255, 155, 34, 255, 245, 23, 1, 25, 1,
0, 8, 99, 108, 105, 101, 110, 116, 73, 68, 0, 10, 119, 105, 108, 108, 32, 116, 111, 112, 105, 99, 0, 12,
119, 105, 108, 108, 32, 109, 101, 115, 115, 97, 103, 101, 0, 9, 85, 115, 101, 114, 32, 78, 97, 109, 101,
0, 21, 65, 32, 116, 101, 120, 116, 32, 112, 97, 115, 115, 119, 111, 114, 100, 32, 36, 36, 39, 47, 37 };
MokChannel mokChannel = new MokChannel(correctEncoded);
// Act
MqttMsgConnect connect = MqttMsgConnect.Parse((byte)MqttMessageType.Connect << 4, MqttProtocolVersion.Version_5, mokChannel);
// Assert
Assert.Equal((byte)MqttProtocolVersion.Version_5, (byte)connect.ProtocolVersion);
Assert.Equal(ClientID, connect.ClientId);
Assert.Equal(UserName, connect.Username);
Assert.Equal(Password, connect.Password);
Assert.Equal(WillTopic, connect.WillTopic);
Assert.Equal(WillMessage, connect.WillMessage);
Assert.Equal(KeepAlivePeriod, connect.KeepAlivePeriod);
Assert.Equal(true, connect.CleanSession);
Assert.Equal(new byte[5] {
0, 1, 2, 3, 4
}, connect.AuthenticationData);
Assert.Equal("Wowo, cool", connect.AuthenticationMethod);
Assert.Equal(uint.MaxValue - 100, connect.MaximumPacketSize);
Assert.Equal((ushort)(ushort.MaxValue - 10), connect.TopicAliasMaximum);
Assert.Equal((ushort)(ushort.MaxValue - 150), connect.ReceiveMaximum);
Assert.Equal(true, connect.RequestProblemInformation);
Assert.Equal(true, connect.RequestResponseInformation);
Assert.Equal(54321, connect.SessionExpiryInterval);
}
public void OnMqttMsgConnected(MqttMsgConnect connect)
{
if (this.ConnectionManager != null)
{
this.ConnectionManager.OnMqttMsgConnected(this, connect);
}
}
public void ConnectUserPropDecodeTestv5()
{
// Arrange
byte[] correctEncoded = new byte[] { 115, 0, 4, 77, 81, 84, 84, 5, 246, 4, 210, 34, 38, 0, 3, 79, 110, 101, 0, 8, 80, 114, 111, 112, 101, 114,
116, 121, 38, 0, 3, 84, 119, 111, 0, 10, 80, 114, 111, 112, 101, 114, 116, 105, 101, 115, 0, 8, 99, 108,
105, 101, 110, 116, 73, 68, 0, 10, 119, 105, 108, 108, 32, 116, 111, 112, 105, 99, 0, 12, 119, 105, 108,
108, 32, 109, 101, 115, 115, 97, 103, 101, 0, 9, 85, 115, 101, 114, 32, 78, 97, 109, 101, 0, 21, 65, 32,
116, 101, 120, 116, 32, 112, 97, 115, 115, 119, 111, 114, 100, 32, 36, 36, 39, 47, 37 };
MokChannel mokChannel = new MokChannel(correctEncoded);
// Act
MqttMsgConnect connect = MqttMsgConnect.Parse((byte)MqttMessageType.Connect << 4, MqttProtocolVersion.Version_5, mokChannel);
// Assert
Assert.Equal((byte)MqttProtocolVersion.Version_5, (byte)connect.ProtocolVersion);
Assert.Equal(ClientID, connect.ClientId);
Assert.Equal(UserName, connect.Username);
Assert.Equal(Password, connect.Password);
Assert.Equal(WillTopic, connect.WillTopic);
Assert.Equal(WillMessage, connect.WillMessage);
Assert.Equal(KeepAlivePeriod, connect.KeepAlivePeriod);
Assert.Equal(true, connect.CleanSession);
Assert.Equal(2, connect.UserProperties.Count);
var prop = new UserProperty("One", "Property");
Assert.Equal(((UserProperty)connect.UserProperties[0]).Name, prop.Name);
Assert.Equal(((UserProperty)connect.UserProperties[0]).Value, prop.Value);
prop = new UserProperty("Two", "Properties");
Assert.Equal(((UserProperty)connect.UserProperties[1]).Name, prop.Name);
Assert.Equal(((UserProperty)connect.UserProperties[1]).Value, prop.Value);
}
/// <summary>
/// Check CONNECT message to accept or not the connection request
/// </summary>
/// <param name="connect">CONNECT message received from client</param>
/// <returns>Return code for CONNACK message</returns>
private byte MqttConnectVerify(MqttMsgConnect connect)
{
// unacceptable protocol version
if ((connect.ProtocolVersion != MqttMsgConnect.PROTOCOL_VERSION_V3_1) &&
(connect.ProtocolVersion != MqttMsgConnect.PROTOCOL_VERSION_V3_1_1))
{
return(MqttMsgConnack.CONN_REFUSED_PROT_VERS);
}
// client id length exceeded (only for old MQTT 3.1)
if ((connect.ProtocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1) &&
(connect.ClientId.Length > MqttMsgConnect.CLIENT_ID_MAX_LENGTH))
{
return(MqttMsgConnack.CONN_REFUSED_IDENT_REJECTED);
}
// [v.3.1.1] client id zero length is allowed but clean session must be true
if ((connect.ClientId.Length == 0) && (!connect.CleanSession))
{
return(MqttMsgConnack.CONN_REFUSED_IDENT_REJECTED);
}
// check user authentication
if (!this.uacManager.AuthenticateUser(connect.Username, connect.Password))
{
return(MqttMsgConnack.CONN_REFUSED_USERNAME_PASSWORD);
}
// server unavailable and not authorized ?
else
{
// TODO : other checks on CONNECT message
}
return(MqttMsgConnack.CONN_ACCEPTED);
}
public void OnMqttMsgConnected(MqttMsgConnect connect)
{
if (ProcessingManager != null)
{
ProcessingManager.OnMqttMsgConnected(this, connect);
}
}
public void ConnectBasicDecodeTestv5()
{
// Arrange
byte[] correctEncoded = new byte[] { 81, 0, 4, 77, 81, 84, 84, 5, 246, 4, 210, 0, 0, 8, 99, 108, 105, 101, 110, 116, 73, 68, 0, 10, 119, 105, 108, 108, 32, 116, 111, 112, 105, 99, 0, 12, 119, 105, 108, 108, 32, 109, 101, 115, 115, 97, 103, 101, 0, 9, 85, 115, 101, 114, 32, 78, 97,
109, 101, 0, 21, 65, 32, 116, 101, 120, 116, 32, 112, 97, 115, 115, 119, 111, 114, 100, 32, 36, 36, 39, 47, 37 };
MokChannel mokChannel = new MokChannel(correctEncoded);
// Act
MqttMsgConnect connect = MqttMsgConnect.Parse((byte)MqttMessageType.Connect << 4, MqttProtocolVersion.Version_5, mokChannel);
// Assert
Assert.Equal((byte)MqttProtocolVersion.Version_5, (byte)connect.ProtocolVersion);
Assert.Equal(ClientID, connect.ClientId);
Assert.Equal(UserName, connect.Username);
Assert.Equal(Password, connect.Password);
Assert.Equal(WillTopic, connect.WillTopic);
Assert.Equal(WillMessage, connect.WillMessage);
Assert.Equal(KeepAlivePeriod, connect.KeepAlivePeriod);
Assert.Equal(true, connect.CleanSession);
}
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);
}
}
}
public void OnMqttMsgConnected(MqttClientConnection clientConnection, MqttMsgConnect message)
{
clientConnection.ProtocolVersion = (MqttProtocolVersion)message.ProtocolVersion;
// verify message to determine CONNACK message return code to the client
byte returnCode = MqttConnectVerify(message);
// [v3.1.1] if client id is zero length, the broker assigns a unique identifier to it
var clientId = (message.ClientId.Length != 0) ? message.ClientId : Guid.NewGuid().ToString();
// connection "could" be accepted
if (returnCode == MqttMsgConnack.CONN_ACCEPTED)
{
// check if there is a client already connected with same client Id
MqttClientConnection clientConnectionConnected = MqttBroker.GetClientConnection(clientId);
// force connection close to the existing client (MQTT protocol)
if (clientConnectionConnected != null)
{
OnConnectionClosed(clientConnectionConnected);
}
// add client to the collection
MqttBroker.TryAddClientConnection(clientId, clientConnection);
Interlocked.Increment(ref numberOfConnectedClients);
}
// connection accepted, load (if exists) client session
if (returnCode == MqttMsgConnack.CONN_ACCEPTED)
{
// check if not clean session and try to recovery a session
if (!message.CleanSession)
{
// create session for the client
MqttClientSession clientSession = new MqttClientSession(clientId);
// get session for the connected client
MqttBrokerSession session = MqttSessionManager.GetSession(clientId);
// [v3.1.1] session present flag
bool sessionPresent = false;
// set inflight queue into the client session
if (session != null)
{
clientSession.InflightMessages = session.InflightMessages;
// [v3.1.1] session present flag
if (clientConnection.ProtocolVersion == MqttProtocolVersion.Version_3_1_1)
{
sessionPresent = true;
}
}
// send CONNACK message to the client
MqttOutgoingMessageManager.Connack(clientConnection, message, returnCode, clientId, sessionPresent);
// load/inject session to the client
clientConnection.LoadSession(clientSession);
if (session != null)
{
// set reference to connected client into the session
session.ClientConnection = clientConnection;
// there are saved subscriptions
if (session.Subscriptions != null)
{
// register all subscriptions for the connected client
foreach (MqttSubscription subscription in session.Subscriptions)
{
MqttSubscriberManager.Subscribe(
subscription.Topic,
subscription.QosLevel,
clientConnection);
// publish retained message on the current subscription
RetainedMessageManager.PublishRetaind(subscription.Topic, clientConnection);
}
}
// there are saved outgoing messages
if (session.OutgoingMessages.Count > 0)
{
// publish outgoing messages for the session
this.publishManager.PublishSession(session.ClientId);
}
}
}
// requested clean session
else
{
// send CONNACK message to the client
MqttOutgoingMessageManager.Connack(clientConnection, message, returnCode, clientId, false);
MqttSessionManager.ClearSession(clientId);
}
}
else
{
// send CONNACK message to the client
MqttOutgoingMessageManager.Connack(clientConnection, message, returnCode, clientId, false);
}
}