//Called when we get a packet on the transport
public void _OnReceivePacket(RouterPacket p)
{
//Get the global ID of this packet and see if we need to create it
ulong globalId = p.GetGlobalMessageID();
RouterMessage msg;
if (!receivingPackets.TryGetValue(globalId, out msg))
{
msg = new RouterMessage(this, p);
receivingPackets.Add(globalId, msg);
}
//Write chunk
if (msg.WriteChunk(p))
{
//We've read all data needed. Handle this packet
try
{
HandleIncomingMessage(msg, p);
}
catch (Exception ex)
{
Log("HandlerWorker", $"Failed to handle incoming message (opcode {msg.opcode} from {msg.sender_addr_router}:{msg.sender_addr_local}) in client code: {ex.Message}{ex.StackTrace}", DeltaLogLevel.Medium);
}
//Clean up
receivingPackets.Remove(globalId);
}
}
private void HandleIncomingMessage(RouterMessage msg, RouterPacket lastPacket)
{
if (lastPacket.CheckFlag(0))
{
//This is a response. The response token will be registered and waiting by us. We'll just have to respond to it
if (waitingResponseSessions.TryGetValue(lastPacket.response_token, out Channel <RouterMessage> channel))
{
//Write response
channel.Writer.WriteAsync(msg).GetAwaiter().GetResult();
//If that's it, clean up and close the channel
if (lastPacket.CheckFlag(1))
{
//Remove
waitingResponseSessions.TryRemove(lastPacket.response_token, out channel);
//Close channel
channel.Writer.Complete();
}
}
else
{
//Not found! Huh.
Log("HandleIncomingMessage", $"Got packet response token {lastPacket.response_token}, but there were no waiting sessions for it! Dropping packet...(although something bad has probably happened)", DeltaLogLevel.High);
}
}
else if (lastPacket.CheckFlag(1))
{
//This is an incoming system message
if (lastPacket.opcode == -1)
{
//Ping message
msg.Respond(new byte[]
{
DeltaConnection.LIB_VERSION_MAJOR,
DeltaConnection.LIB_VERSION_MINOR,
appVersion.major,
appVersion.major
}, true);
}
}
else
{
//This is an incoming message, handle as usual
RouterReceiveMessage(msg);
}
}
public abstract void RouterReceiveMessage(RouterMessage msg);