MqttPacket DecodePublishPacket(ReceivedMqttPacket receivedMqttPacket)
{
ThrowIfBodyIsEmpty(receivedMqttPacket.Body);
_bufferReader.SetBuffer(receivedMqttPacket.Body.Array, receivedMqttPacket.Body.Offset, receivedMqttPacket.Body.Count);
var retain = (receivedMqttPacket.FixedHeader & 0x1) > 0;
var qualityOfServiceLevel = (MqttQualityOfServiceLevel)((receivedMqttPacket.FixedHeader >> 1) & 0x3);
var dup = (receivedMqttPacket.FixedHeader & 0x8) > 0;
var topic = _bufferReader.ReadString();
ushort packetIdentifier = 0;
if (qualityOfServiceLevel > MqttQualityOfServiceLevel.AtMostOnce)
{
packetIdentifier = _bufferReader.ReadTwoByteInteger();
}
var packet = new MqttPublishPacket
{
PacketIdentifier = packetIdentifier,
Retain = retain,
Topic = topic,
QualityOfServiceLevel = qualityOfServiceLevel,
Dup = dup
};
if (!_bufferReader.EndOfStream)
{
packet.Payload = _bufferReader.ReadRemainingData();
}
return(packet);
}
MqttPacket DecodePublishPacket(byte header, ArraySegment <byte> body)
{
ThrowIfBodyIsEmpty(body);
_bufferReader.SetBuffer(body.Array, body.Offset, body.Count);
var retain = (header & 1) > 0;
var qos = (MqttQualityOfServiceLevel)((header >> 1) & 3);
var dup = ((header >> 3) & 1) > 0;
var packet = new MqttPublishPacket
{
Topic = _bufferReader.ReadString(),
Retain = retain,
QualityOfServiceLevel = qos,
Dup = dup
};
if (qos > 0)
{
packet.PacketIdentifier = _bufferReader.ReadTwoByteInteger();
}
var propertiesReader = new MqttV5PropertiesReader(_bufferReader);
while (propertiesReader.MoveNext())
{
if (propertiesReader.CurrentPropertyId == MqttPropertyId.PayloadFormatIndicator)
{
packet.PayloadFormatIndicator = propertiesReader.ReadPayloadFormatIndicator();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MessageExpiryInterval)
{
packet.MessageExpiryInterval = propertiesReader.ReadMessageExpiryInterval();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.TopicAlias)
{
packet.TopicAlias = propertiesReader.ReadTopicAlias();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ResponseTopic)
{
packet.ResponseTopic = propertiesReader.ReadResponseTopic();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.CorrelationData)
{
packet.CorrelationData = propertiesReader.ReadCorrelationData();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.SubscriptionIdentifier)
{
if (packet.SubscriptionIdentifiers == null)
{
packet.SubscriptionIdentifiers = new List <uint>();
}
packet.SubscriptionIdentifiers.Add(propertiesReader.ReadSubscriptionIdentifier());
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ContentType)
{
packet.ContentType = propertiesReader.ReadContentType();
}
else
{
propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttPublishPacket));
}
}
packet.UserProperties = propertiesReader.CollectedUserProperties;
if (!_bufferReader.EndOfStream)
{
packet.Payload = _bufferReader.ReadRemainingData();
}
return(packet);
}