private static MqttBasePacket DeserializePublish(MqttReceivedPacket receivedMqttPacket)
{
ThrowIfBodyIsEmpty(receivedMqttPacket.Body);
var retain = (receivedMqttPacket.FixedHeader & 0x1) > 0;
var qualityOfServiceLevel = (MqttQualityOfServiceLevel)(receivedMqttPacket.FixedHeader >> 1 & 0x3);
var dup = (receivedMqttPacket.FixedHeader & 0x8) > 0;
var topic = receivedMqttPacket.Body.ReadStringWithLengthPrefix();
ushort?packetIdentifier = null;
if (qualityOfServiceLevel > MqttQualityOfServiceLevel.AtMostOnce)
{
packetIdentifier = receivedMqttPacket.Body.ReadUInt16();
}
var packet = new MqttPublishPacket
{
PacketIdentifier = packetIdentifier,
Retain = retain,
Topic = topic,
Payload = receivedMqttPacket.Body.ReadRemainingData().ToArray(),
QualityOfServiceLevel = qualityOfServiceLevel,
Dup = dup
};
return(packet);
}
public MqttBasePacket Deserialize(MqttReceivedPacket receivedMqttPacket)
{
if (receivedMqttPacket == null)
{
throw new ArgumentNullException(nameof(receivedMqttPacket));
}
var controlPacketType = receivedMqttPacket.FixedHeader >> 4;
if (controlPacketType < 1 || controlPacketType > 14)
{
throw new MqttProtocolViolationException($"The packet type is invalid ({controlPacketType}).");
}
switch ((MqttControlPacketType)controlPacketType)
{
case MqttControlPacketType.Connect: return(DeserializeConnect(receivedMqttPacket.Body));
case MqttControlPacketType.ConnAck: return(DeserializeConnAck(receivedMqttPacket.Body));
case MqttControlPacketType.Disconnect: return(new MqttDisconnectPacket());
case MqttControlPacketType.Publish: return(DeserializePublish(receivedMqttPacket));
case MqttControlPacketType.PubAck: return(DeserializePubAck(receivedMqttPacket.Body));
case MqttControlPacketType.PubRec: return(DeserializePubRec(receivedMqttPacket.Body));
case MqttControlPacketType.PubRel: return(DeserializePubRel(receivedMqttPacket.Body));
case MqttControlPacketType.PubComp: return(DeserializePubComp(receivedMqttPacket.Body));
case MqttControlPacketType.PingReq: return(new MqttPingReqPacket());
case MqttControlPacketType.PingResp: return(new MqttPingRespPacket());
case MqttControlPacketType.Subscribe: return(DeserializeSubscribe(receivedMqttPacket.Body));
case MqttControlPacketType.SubAck: return(DeserializeSubAck(receivedMqttPacket.Body));
case MqttControlPacketType.Unsubscibe: return(DeserializeUnsubscribe(receivedMqttPacket.Body));
case MqttControlPacketType.UnsubAck: return(DeserializeUnsubAck(receivedMqttPacket.Body));
default: throw new MqttProtocolViolationException($"Packet type ({controlPacketType}) not supported.");
}
}
