100 lines
4.0 KiB
C#
100 lines
4.0 KiB
C#
using System;
|
|
using System.Net;
|
|
using System.Net.Sockets;
|
|
using System.Numerics;
|
|
using System.Threading;
|
|
using System.Threading.Tasks;
|
|
|
|
namespace Mistox.Server {
|
|
public class ServerConnection : IDisposable {
|
|
|
|
public string UserName { get; set; } = ""; // The Players UserName
|
|
public bool IsAuthenticated { get; set; } = false; // Has the player authenticated
|
|
public Vector3 Position { get; set; } // The ingame position of the player
|
|
public bool Connected { get; set; } = true; // Is the connection valid
|
|
|
|
private readonly MistoxServer _parent;
|
|
private readonly TcpClient _client;
|
|
private readonly IPEndPoint _remoteAddress;
|
|
private readonly SemaphoreSlim _sendLock = new SemaphoreSlim(1, 1);
|
|
private readonly CancellationTokenSource _cts = new();
|
|
|
|
public ServerConnection( TcpClient tcpClient, MistoxServer parent, IPEndPoint remote ) {
|
|
_parent = parent;
|
|
_remoteAddress = remote;
|
|
_client = tcpClient;
|
|
_client.NoDelay = true;
|
|
_client.ReceiveTimeout = _parent.ConnectionTimeoutSeconds * 1000;
|
|
|
|
// Start the receive thread
|
|
Task.Run(ReceiveThread);
|
|
}
|
|
|
|
async Task ReceiveThread() {
|
|
using( NetworkStream ns = _client.GetStream() ) {
|
|
try {
|
|
byte[] headerBuffer = new byte[DataPacket.HeaderLength];
|
|
byte[] payloadBuffer = new byte[65535]; // Upper limit for safety
|
|
while( Connected && _parent.Alive ) {
|
|
|
|
// Read the header off
|
|
await ns.ReadExactlyAsync(headerBuffer, 0, DataPacket.HeaderLength, _cts.Token);
|
|
|
|
// Pack the header variables for faster memory passing
|
|
DataPacketHeader Header = new DataPacketHeader {
|
|
Type = (ushort)((headerBuffer[0] << 8) | headerBuffer[1]),
|
|
DataLength = (ushort)((headerBuffer[2] << 8) | headerBuffer[3])
|
|
};
|
|
|
|
// Make sure the data looks valid
|
|
if (Header.DataLength > payloadBuffer.Length) {
|
|
throw new Exception("Incoming TCP payload is too large for the pre-allocated buffer.");
|
|
}
|
|
|
|
// Read off the data
|
|
await ns.ReadExactlyAsync(payloadBuffer, 0, Header.DataLength, _cts.Token);
|
|
|
|
// Create the dataobject
|
|
dynamic dataobject = DataPacket.Deserialize( Header, payloadBuffer.AsMemory(DataPacket.HeaderLength) );
|
|
|
|
// Return the object
|
|
_parent.InvokeDataReceived(this, dataobject);
|
|
|
|
}
|
|
} catch (Exception e) {
|
|
_parent.Alive = false;
|
|
Dispose();
|
|
Console.WriteLine($"[TCP] Connection lost ({_remoteAddress}): {e.Message}");
|
|
} finally {
|
|
Dispose();
|
|
}
|
|
}
|
|
}
|
|
|
|
public async Task Send<T>( T packet ) {
|
|
byte[] byteData = DataPacket.Serialize(packet);
|
|
await _sendLock.WaitAsync();
|
|
try {
|
|
await _client.GetStream().WriteAsync(byteData, 0, byteData.Length);
|
|
} finally {
|
|
_sendLock.Release();
|
|
}
|
|
}
|
|
|
|
public IPAddress getRemote() {
|
|
return _remoteAddress.Address;
|
|
}
|
|
|
|
public void Dispose() {
|
|
Connected = false;
|
|
_cts.Cancel();
|
|
_client.Close();
|
|
_sendLock.Dispose();
|
|
_cts.Dispose();
|
|
|
|
_parent.InvokeUserDisconnected(this);
|
|
// Remove this item from the Dictionary on the Server for garbage collection
|
|
}
|
|
}
|
|
}
|