// Will get a single packet from a TcpClient
// Will return null if there isn't any data available or some other
// issue getting data from the client
public async Task <Packet> ReceivePacket(TcpClient client)
{
Packet packet = null;
try
{
// First check there is data available
if (client.Available == 0)
{
return(null);
}
NetworkStream msgStream = client.GetStream();
// There must be some incoming data, the first two bytes are the size of the Packet
byte[] lengthBuffer = new byte[2];
await msgStream.ReadAsync(lengthBuffer, 0, 2);
ushort packetByteSize = BitConverter.ToUInt16(lengthBuffer, 0);
// Now read that many bytes from what's left in the stream, it must be the Packet
byte[] jsonBuffer = new byte[packetByteSize];
await msgStream.ReadAsync(jsonBuffer, 0, jsonBuffer.Length);
// Convert it into a packet datatype
string jsonString = Encoding.UTF8.GetString(jsonBuffer);
packet = Packet.FromJson(jsonString);
//Console.WriteLine("[RECEIVED]\n{0}", packet);
}
catch (Exception e)
{
// There was an issue in receiving
Console.WriteLine("There was an issue sending a packet to {0}.", client.Client.RemoteEndPoint);
Console.WriteLine("Reason: {0}", e.Message);
}
return(packet);
}
