private static MqttBasePacket DeserializePublish(MqttPacketReader reader, MqttPacketHeader mqttPacketHeader)
{
var fixedHeader = new ByteReader(mqttPacketHeader.FixedHeader);
var retain = fixedHeader.Read();
var qualityOfServiceLevel = (MqttQualityOfServiceLevel)fixedHeader.Read(2);
var dup = fixedHeader.Read();
var topic = reader.ReadStringWithLengthPrefix();
ushort packetIdentifier = 0;
if (qualityOfServiceLevel > MqttQualityOfServiceLevel.AtMostOnce)
{
packetIdentifier = reader.ReadUInt16();
}
var packet = new MqttPublishPacket
{
Retain = retain,
QualityOfServiceLevel = qualityOfServiceLevel,
Dup = dup,
Topic = topic,
Payload = reader.ReadRemainingData(),
PacketIdentifier = packetIdentifier
};
return(packet);
}
private static MqttBasePacket DeserializeUnsubscribe(MqttPacketReader reader)
{
var packet = new MqttUnsubscribePacket
{
PacketIdentifier = reader.ReadUInt16(),
};
while (!reader.EndOfRemainingData)
{
packet.TopicFilters.Add(reader.ReadStringWithLengthPrefix());
}
return(packet);
}
private static MqttBasePacket DeserializeSubscribe(MqttPacketReader reader)
{
var packet = new MqttSubscribePacket
{
PacketIdentifier = reader.ReadUInt16()
};
while (!reader.EndOfRemainingData)
{
packet.TopicFilters.Add(new TopicFilter(
reader.ReadStringWithLengthPrefix(),
(MqttQualityOfServiceLevel)reader.ReadByte()));
}
return(packet);
}
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.");
}
reader.ReadByte(); // Skip protocol level
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
{
Topic = reader.ReadStringWithLengthPrefix(),
Payload = reader.ReadWithLengthPrefix(),
QualityOfServiceLevel = (MqttQualityOfServiceLevel)willQoS,
Retain = willRetain
};
}
if (usernameFlag)
{
packet.Username = reader.ReadStringWithLengthPrefix();
}
if (passwordFlag)
{
packet.Password = reader.ReadStringWithLengthPrefix();
}
ValidateConnectPacket(packet);
return(packet);
}
