/// <summary>
/// Read incoming headers
/// </summary>
public static void ReceiveHeader()
{
while (true)
{
while (IsConnected)
{
try
{
byte[] header = ReceiveData(4);
if (header.Length != 4)
{
IsConnected = false;
break;
}
else
{
int packetSize = BitConverter.ToInt32(header, 0);
if (packetSize > 0)
{
Console.WriteLine($"Android: packet size is {packetSize}");
byte[] payload = ReceiveData(packetSize);
if (payload.Length != packetSize)
{
IsConnected = false;
break;
}
else
{
IPacket packet = Desirialize.PacketDesirialize(payload);
Console.WriteLine($"Android: packet received is {packet.GetType().Name}");
new Thread(delegate()
{
new ReadPacket(packet);
}).Start();
}
}
}
}
catch (SocketException se)
{
Console.WriteLine(se.SocketErrorCode);
IsConnected = false;
break;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
IsConnected = false;
break;
}
}
while (!IsConnected)
{
try
{
Socket?.Dispose();
KeepAlivePacket?.Dispose();
Socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
{
ReceiveBufferSize = 50000,
SendBufferSize = 50000,
};
Socket.Connect(Configuration.Host, Configuration.Port);
IsConnected = true;
Send(IdSender());
KeepAlivePacket = new Timer(Ping, null, new Random().Next(5000, 30000), new Random().Next(5000, 30000)); //random interval
}
catch (SocketException se)
{
Console.WriteLine(se.SocketErrorCode);
Thread.Sleep(new Random().Next(2000, 5000));
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Thread.Sleep(new Random().Next(2000, 5000));
}
}
}
}
/// <summary>
/// Read incoming packets | Asynchronous
/// docs.microsoft.com/en-us/dotnet/api/system.net.sockets.socket.endreceive?view=netframework-4.8
/// </summary>
private void ReceiveCall(IAsyncResult ar)
{
try
{
int received = Socket.EndReceive(ar);
//Debug.WriteLine($"Server: received[{received}] offset[{Offset}] size[{Size}]");
Offset += received;
Size -= received;
BytesReceived += received;
if (received > 0)
{
switch (HeaderReceived)
{
case false:
{
if (Size == 0)
{
PayloadSize = BitConverter.ToInt32(Buffer, 0);
if (PayloadSize > 0)
{
Size = PayloadSize;
Offset = 0;
Buffer = new byte[PayloadSize];
Socket.ReceiveBufferSize = Size;
BytesReceived = 0;
HeaderReceived = true;
Debug.WriteLine($"Server: packet size is {PayloadSize}");
}
else
{
PayloadSize = 0;
Size = 4;
Offset = 0;
Buffer = new byte[Size];
Socket.ReceiveBufferSize = Size;
BytesReceived = 0;
}
}
break;
}
case true:
{
if (Size == 0)
{
IPacket packet = Desirialize.PacketDesirialize(Buffer);
Debug.WriteLine($"Server: packet received is {packet.GetType().Name}");
ThreadPool.QueueUserWorkItem((o) =>
{
new ReadPacket(this, packet);
});
PayloadSize = 0;
Size = 4;
Offset = 0;
Buffer = new byte[Size];
Socket.ReceiveBufferSize = Size;
BytesReceived = 0;
HeaderReceived = false;
}
break;
}
}
Socket.BeginReceive(Buffer, Offset, Size, 0, ReceiveCall, null);
}
else
{
Disconnected();
return;
}
}
catch (SocketException se)
{
Debug.WriteLine(se.SocketErrorCode);
Disconnected();
return;
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
Disconnected();
return;
}
}
/// <summary>
/// Read incoming headers
/// </summary>
public static void ReceiveHeader()
{
while (true)
{
while (IsConnected)
{
try
{
byte[] header = ReceiveData(4);
if (header.Length != 4)
{
IsConnected = false;
break;
}
else
{
int packetSize = BitConverter.ToInt32(header, 0);
if (packetSize > 0)
{
Debug.WriteLine($"Client: packet size is {packetSize}");
byte[] payload = ReceiveData(packetSize);
if (payload.Length != packetSize)
{
IsConnected = false;
break;
}
else
{
IPacket packet = Desirialize.PacketDesirialize(payload);
Debug.WriteLine($"Client: packet received is {packet.GetType().Name}");
new Thread(delegate()
{
new ReadPacket(packet);
}).Start();
}
}
}
}
catch (SocketException se)
{
Debug.WriteLine(se.SocketErrorCode);
IsConnected = false;
break;
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
IsConnected = false;
break;
}
}
while (!IsConnected)
{
try
{
Thread.Sleep(2000);
Socket?.Dispose();
KeepAlivePacket?.Dispose();
Socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
{
ReceiveBufferSize = 50 * 1000,
SendBufferSize = 50 * 1000,
};
Socket.Connect(Configuration.Host, Configuration.Port);
IsConnected = true;
Send(new PacketIdentification()
{
Type = ClientType.PC,
Username = Environment.UserName,
OperatingSystem = new ComputerInfo().OSFullName,
ID = Configuration.Id,
});
KeepAlivePacket = new Timer(Ping, null, new Random().Next(5000, 30000), new Random().Next(5000, 30000)); //random interval
}
catch (SocketException se)
{
Debug.WriteLine(se.SocketErrorCode);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
}
}
