public bool TryDispatch(MqttPacket packet)
{
if (packet == null)
{
throw new ArgumentNullException(nameof(packet));
}
ushort identifier = 0;
if (packet is MqttPacketWithIdentifier packetWithIdentifier)
{
identifier = packetWithIdentifier.PacketIdentifier;
}
var packetType = packet.GetType();
var awaitables = new List <IMqttPacketAwaitable>();
lock (_awaitables)
{
for (var i = _awaitables.Count - 1; i >= 0; i--)
{
var entry = _awaitables[i];
// Note: The PingRespPacket will also arrive here and has NO identifier but there
// is code which waits for it. So the code must be able to deal with filters which
// are referring to the type only (identifier is 0)!
if (entry.Filter.Type != packetType || entry.Filter.Identifier != identifier)
{
continue;
}
awaitables.Add(entry);
_awaitables.RemoveAt(i);
}
}
foreach (var matchingEntry in awaitables)
{
matchingEntry.Complete(packet);
}
return(awaitables.Count > 0);
}
public void AssertIsConnAckPacket(MqttPacket packet)
{
Assert.AreEqual(packet.GetType(), typeof(MqttConnAckPacket));
}
static void ThrowIfPacketIdentifierIsInvalid(ushort packetIdentifier, MqttPacket packet)
{
// SUBSCRIBE, UNSUBSCRIBE, and PUBLISH(in cases where QoS > 0) Control Packets MUST contain a non-zero 16 - bit Packet Identifier[MQTT - 2.3.1 - 1].
if (packetIdentifier == 0)
{
throw new MqttProtocolViolationException($"Packet identifier is not set for {packet.GetType().Name}.");
}
}
