private static MqttBasePacket DeserializeConnect(MqttPacketReader reader)
{
reader.ReadBytes(2); // Skip 2 bytes
MqttProtocolVersion protocolVersion;
var protocolName = reader.ReadBytes(4);
if (protocolName.SequenceEqual(ProtocolVersionV310Name))
{
reader.ReadBytes(2);
protocolVersion = MqttProtocolVersion.V310;
}
else if (protocolName.SequenceEqual(ProtocolVersionV311Name))
{
protocolVersion = MqttProtocolVersion.V311;
}
else
{
throw new MqttProtocolViolationException("Protocol name is not supported.");
}
var protocolLevel = reader.ReadByte();
var connectFlags = reader.ReadByte();
var connectFlagsReader = new ByteReader(connectFlags);
connectFlagsReader.Read(); // Reserved.
var packet = new MqttConnectPacket
{
ProtocolVersion = protocolVersion,
CleanSession = connectFlagsReader.Read()
};
var willFlag = connectFlagsReader.Read();
var willQoS = connectFlagsReader.Read(2);
var willRetain = connectFlagsReader.Read();
var passwordFlag = connectFlagsReader.Read();
var usernameFlag = connectFlagsReader.Read();
packet.KeepAlivePeriod = reader.ReadUInt16();
packet.ClientId = reader.ReadStringWithLengthPrefix();
if (willFlag)
{
packet.WillMessage = new MqttApplicationMessage(
reader.ReadStringWithLengthPrefix(),
reader.ReadWithLengthPrefix(),
(MqttQualityOfServiceLevel)willQoS,
willRetain);
}
if (usernameFlag)
{
packet.Username = reader.ReadStringWithLengthPrefix();
}
if (passwordFlag)
{
packet.Password = reader.ReadStringWithLengthPrefix();
}
ValidateConnectPacket(packet);
return(packet);
}
