protected override ConnectAck Read(byte[] bytes)
{
ValidateHeaderFlag(bytes, t => t == MqttPacketType.ConnectAck, 0x00);
MqttProtocol.Encoding.DecodeRemainingLength(bytes, out int remainingLengthBytesLength);
int connectAckFlagsIndex = MqttProtocol.PacketTypeLength + remainingLengthBytesLength;
if (bytes.Byte(connectAckFlagsIndex).Bits(7) != 0x00)
{
throw new MqttException(ClientProperties.ConnectAckFormatter_InvalidAckFlags);
}
bool sessionPresent = bytes.Byte(connectAckFlagsIndex).IsSet(0);
MqttConnectionStatus returnCode = (MqttConnectionStatus)bytes.Byte(connectAckFlagsIndex + 1);
if (returnCode != MqttConnectionStatus.Accepted && sessionPresent)
{
throw new MqttException(ClientProperties.ConnectAckFormatter_InvalidSessionPresentForErrorReturnCode);
}
ConnectAck connectAck = new ConnectAck(returnCode, sessionPresent);
return(connectAck);
}
public ConnectAck(MqttConnectionStatus status, bool existingSession)
{
Status = status;
SessionPresent = existingSession;
}
/// <summary>
/// Initializes a new instance of the <see cref="MqttConnectionException" /> class,
/// specifying the status and reason of the connection failure ,
/// a specific error message and a reference to the inner exception that is the cause
/// of this exception
/// </summary>
/// <param name="status">
/// Code that represents the status and reason of the failure
/// See <see cref="MqttConnectionStatus" /> for more information about the possible connection status values
/// </param>
/// <param name="message">The error message that explains the reason for the exception</param>
/// <param name="innerException">The exception that is the cause of the current exception</param>
public MqttConnectionException(MqttConnectionStatus status, string message, Exception innerException) : base(message, innerException)
{
ReturnCode = status;
}
public static string Client_ConnectNotAccepted(string clientId, MqttConnectionStatus status) => $"The connect packet of client {clientId} has not been accepted by the server. Status: {status}. The connection will be closed";
/// <summary>
/// Initializes a new instance of the <see cref="MqttConnectionException" /> class,
/// specifying the status and reason of the connection failure
/// </summary>
/// <param name="status">
/// Code that represents the status and reason of the failure
/// See <see cref="MqttConnectionStatus" /> for more information about the possible connection status values
/// </param>
public MqttConnectionException(MqttConnectionStatus status)
{
ReturnCode = status;
}
