MqttPacket DecodeSubscribePacket(ArraySegment <byte> body)
{
ThrowIfBodyIsEmpty(body);
_bufferReader.SetBuffer(body.Array, body.Offset, body.Count);
var packet = new MqttSubscribePacket
{
PacketIdentifier = _bufferReader.ReadTwoByteInteger()
};
var propertiesReader = new MqttV5PropertiesReader(_bufferReader);
while (propertiesReader.MoveNext())
{
if (propertiesReader.CurrentPropertyId == MqttPropertyId.SubscriptionIdentifier)
{
packet.SubscriptionIdentifier = propertiesReader.ReadSubscriptionIdentifier();
}
else
{
propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttSubscribePacket));
}
}
packet.UserProperties = propertiesReader.CollectedUserProperties;
while (!_bufferReader.EndOfStream)
{
var topic = _bufferReader.ReadString();
var options = _bufferReader.ReadByte();
var qos = (MqttQualityOfServiceLevel)(options & 3);
var noLocal = (options & (1 << 2)) > 0;
var retainAsPublished = (options & (1 << 3)) > 0;
var retainHandling = (MqttRetainHandling)((options >> 4) & 3);
packet.TopicFilters.Add(
new MqttTopicFilter
{
Topic = topic,
QualityOfServiceLevel = qos,
NoLocal = noLocal,
RetainAsPublished = retainAsPublished,
RetainHandling = retainHandling
});
}
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);
}