Initial commit

HyperbolicDowloader/Networking/BroadcastClient.cs

@@ -0,0 +1,75 @@
+using Stone_Red_Utilities.ConsoleExtentions;
+
+using System.Net;
+using System.Net.NetworkInformation;
+using System.Net.Sockets;
+using System.Text;
+
+namespace HyperbolicDowloader.Networking;
+
+internal class BroadcastClient
+{
+    public event EventHandler<BroadcastRecivedEventArgs>? OnBroadcastRecived;
+
+    public bool IsListening { get; private set; } = false;
+
+    private UdpClient? udpListener;
+
+    public void Send(int port, string message)
+    {
+        Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+
+        IPAddress? ip4Address = NetworkUtilities.GetIP4Adress();
+
+        if (ip4Address is null)
+        {
+            ConsoleExt.WriteLine("Could not find suitable network adapter!", ConsoleColor.Red);
+            return;
+        }
+
+        UnicastIPAddressInformation? addressInformation = NetworkUtilities.GetUnicastIPAddressInformation(ip4Address);
+
+        if (addressInformation is null)
+        {
+            ConsoleExt.WriteLine("Could not find suitable network adapter!", ConsoleColor.Red);
+            return;
+        }
+
+        IPAddress broadcast = NetworkUtilities.GetBroadcastAddress(addressInformation);
+
+        byte[] sendbuf = Encoding.ASCII.GetBytes(message);
+        IPEndPoint ep = new IPEndPoint(broadcast, port);
+
+        s.SendTo(sendbuf, ep);
+    }
+
+    public void StartListening(int port)
+    {
+        if (IsListening == true)
+        {
+            throw new InvalidOperationException("Already listening!");
+        }
+
+        IsListening = true;
+
+        udpListener = new UdpClient(port);
+        IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, port);
+
+        Task.Run(() =>
+        {
+            while (IsListening)
+            {
+                byte[] bytes = udpListener.Receive(ref groupEP);
+                string message = Encoding.ASCII.GetString(bytes, 0, bytes.Length);
+
+                OnBroadcastRecived?.Invoke(this, new BroadcastRecivedEventArgs(groupEP, message));
+            }
+        });
+    }
+
+    public void StopListening()
+    {
+        udpListener?.Close();
+        IsListening = false;
+    }
+}