Fixed a bug where VRCFT would crash on close, freezing the app

BabbleOSC.cs

@@ -1,4 +1,4 @@
-using System.Net;
+using System.Net;
 using System.Net.Sockets;
 using Microsoft.Extensions.Logging;
 using VRCFaceTracking.Core.OSC;
@@ -7,6 +7,7 @@ namespace VRCFaceTracking.Babble;
 public partial class BabbleOSC
 {
     private Socket _receiver;
+    public bool _loop = true;
     private readonly Thread _thread;
     private readonly ILogger _logger;
     private readonly int _resolvedPort;
@@ -25,9 +26,10 @@ public BabbleOSC(ILogger iLogger, int? port = null)
 
         _receiver = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
         _resolvedPort = port ?? DEFAULT_PORT;
-        _receiver.Connect(new IPEndPoint(IPAddress.Parse("127.0.0.1"), _resolvedPort));
+        _receiver.Bind(new IPEndPoint(IPAddress.Parse("127.0.0.1"), _resolvedPort));
         _receiver.ReceiveTimeout = TIMEOUT_MS;
 
+        _loop = true;
         _thread = new Thread(new ThreadStart(ListenLoop));
         _thread.Start();
     }
@@ -37,11 +39,11 @@ private void ListenLoop()
         OscMessageMeta oscMeta = new OscMessageMeta();
         var buffer = new byte[4096];
 
-        while (!MainStandalone.MasterCancellationTokenSource.IsCancellationRequested)
+        while (_loop)
         {
             try
             {
-                if (_receiver.Connected)
+                if (_receiver.IsBound)
                 {
                     var length = _receiver.Receive(buffer);
                     if (SROSCLib.parse_osc(buffer, length, ref oscMeta))
@@ -60,20 +62,17 @@ private void ListenLoop()
                     _receiver.Close();
                     _receiver.Dispose();
                     _receiver = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
-                    _receiver.Connect(new IPEndPoint(IPAddress.Parse("127.0.0.1"), _resolvedPort));
+                    _receiver.Bind(new IPEndPoint(IPAddress.Parse("127.0.0.1"), _resolvedPort));
                     _receiver.ReceiveTimeout = TIMEOUT_MS;
                 }
             }
-            catch (Exception e)
-            {
-                if (_receiver.Connected)
-                    _logger.LogError(e.Message);
-            }
+            catch (Exception) { }
         }
     }
 
     public void Teardown()
     {
+        _loop = false;
         _receiver.Close();
         _receiver.Dispose();
         _thread.Join();