/// <summary>
/// Parse bytes for a CONNACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNACK message instance</returns>
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
MqttMsgConnack msg = new MqttMsgConnack();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_CONNACK_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] ... set session present flag ...
msg.sessionPresent = (buffer[CONN_ACK_FLAGS_BYTE_OFFSET] & SESSION_PRESENT_FLAG_MASK) != 0x00;
}
// ...and set return code from broker
msg.returnCode = buffer[CONN_RETURN_CODE_BYTE_OFFSET];
return(msg);
}
/// <summary>
/// Parse bytes for a CONNACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="socket">Socket connected to the broker</param>
/// <returns>CONNACK message instance</returns>
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, Socket socket)
{
byte[] buffer;
MqttMsgConnack msg = new MqttMsgConnack();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(socket);
buffer = new byte[remainingLength];
// read bytes from socket...
socket.Receive(buffer);
// ...and set return code from broker
msg.returnCode = buffer[CONN_RETURN_CODE_BYTE_OFFSET];
return msg;
}
/// <summary>
/// Parse bytes for a CONNACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNACK message instance</returns>
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
MqttMsgConnack msg = new MqttMsgConnack();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// ...and set return code from broker
msg.returnCode = buffer[CONN_RETURN_CODE_BYTE_OFFSET];
return(msg);
}
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
MqttMsgConnack mqttMsgConnack = new MqttMsgConnack();
if (protocolVersion == (byte)4 && ((uint)fixedHeaderFirstByte & 15U) > 0U)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
byte[] buffer = new byte[MqttMsgBase.decodeRemainingLength(channel)];
channel.Receive(buffer);
if (protocolVersion == (byte)4)
{
mqttMsgConnack.sessionPresent = ((uint)buffer[0] & 1U) > 0U;
}
mqttMsgConnack.returnCode = buffer[1];
return(mqttMsgConnack);
}
/// <summary>
/// Send CONNACK message to the client (connection accepted or not)
/// </summary>
/// <param name="returnCode">Return code for CONNACK message</param>
/// <param name="connect">CONNECT message with all client information</param>
public void Connack(byte returnCode, MqttMsgConnect connect)
{
this.lastCommTime = 0;
// create CONNACK message and ...
MqttMsgConnack connack = new MqttMsgConnack();
connack.ReturnCode = returnCode;
// ... send it to the client
this.Send(connack);
// connection accepted, start keep alive thread checking
if (connack.ReturnCode == MqttMsgConnack.CONN_ACCEPTED)
{
this.ClientId = connect.ClientId;
this.CleanSession = connect.CleanSession;
this.WillFlag = connect.WillFlag;
this.WillTopic = connect.WillTopic;
this.WillMessage = connect.WillMessage;
this.WillQosLevel = connect.WillQosLevel;
this.keepAlivePeriod = connect.KeepAlivePeriod * 1000; // convert in ms
// broker has a tolerance of 1.5 specified keep alive period
this.keepAlivePeriod += (this.keepAlivePeriod / 2);
// start thread for checking keep alive period timeout
this.keepAliveThread = new Thread(this.KeepAliveThread);
this.keepAliveThread.Name = KEEP_ALIVE_THREAD;
this.keepAliveThread.Start();
this.IsConnected = true;
}
// connection refused, close TCP/IP channel
else
{
this.Close();
}
}
/// <summary>
/// Parse bytes for a CONNACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNACK message instance</returns>
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
MqttMsgConnack msg = new MqttMsgConnack();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_CONNACK_FLAG_BITS)
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] ... set session present flag ...
msg.sessionPresent = (buffer[CONN_ACK_FLAGS_BYTE_OFFSET] & SESSION_PRESENT_FLAG_MASK) != 0x00;
}
// ...and set return code from broker
msg.returnCode = buffer[CONN_RETURN_CODE_BYTE_OFFSET];
return msg;
}
