From 8d2a2cd5de40e2b94ef5007c32832ed9a063dc40 Mon Sep 17 00:00:00 2001
From: chai <215380520@qq.com>
Date: Thu, 12 Oct 2023 22:09:49 +0800
Subject: +hazel-networking

---
 .../Hazel/Udp/UdpServerConnection.cs               | 108 +++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 Tools/Hazel-Networking/Hazel/Udp/UdpServerConnection.cs

(limited to 'Tools/Hazel-Networking/Hazel/Udp/UdpServerConnection.cs')

diff --git a/Tools/Hazel-Networking/Hazel/Udp/UdpServerConnection.cs b/Tools/Hazel-Networking/Hazel/Udp/UdpServerConnection.cs
new file mode 100644
index 0000000..ff5b29d
--- /dev/null
+++ b/Tools/Hazel-Networking/Hazel/Udp/UdpServerConnection.cs
@@ -0,0 +1,108 @@
+using System;
+using System.Net;
+
+namespace Hazel.Udp
+{
+    /// <summary>
+    ///     Represents a servers's connection to a client that uses the UDP protocol.
+    /// </summary>
+    /// <inheritdoc/>
+    internal sealed class UdpServerConnection : UdpConnection
+    {
+        /// <summary>
+        ///     The connection listener that we use the socket of.
+        /// </summary>
+        /// <remarks>
+        ///     Udp server connections utilize the same socket in the listener for sends/receives, this is the listener that 
+        ///     created this connection and is hence the listener this conenction sends and receives via.
+        /// </remarks>
+        public UdpConnectionListener Listener { get; private set; }
+
+        /// <summary>
+        ///     Creates a UdpConnection for the virtual connection to the endpoint.
+        /// </summary>
+        /// <param name="listener">The listener that created this connection.</param>
+        /// <param name="endPoint">The endpoint that we are connected to.</param>
+        /// <param name="IPMode">The IPMode we are connected using.</param>
+        internal UdpServerConnection(UdpConnectionListener listener, IPEndPoint endPoint, IPMode IPMode, ILogger logger)
+            : base(logger)
+        {
+            this.Listener = listener;
+            this.EndPoint = endPoint;
+            this.IPMode = IPMode;
+
+            State = ConnectionState.Connected;
+            this.InitializeKeepAliveTimer();
+        }
+
+        /// <inheritdoc />
+        protected override void WriteBytesToConnection(byte[] bytes, int length)
+        {
+            this.Statistics.LogPacketSend(length);
+            Listener.SendData(bytes, length, EndPoint);
+        }
+
+        /// <inheritdoc />
+        /// <remarks>
+        ///     This will always throw a HazelException.
+        /// </remarks>
+        public override void Connect(byte[] bytes = null, int timeout = 5000)
+        {
+            throw new InvalidOperationException("Cannot manually connect a UdpServerConnection, did you mean to use UdpClientConnection?");
+        }
+
+        /// <inheritdoc />
+        /// <remarks>
+        ///     This will always throw a HazelException.
+        /// </remarks>
+        public override void ConnectAsync(byte[] bytes = null)
+        {
+            throw new InvalidOperationException("Cannot manually connect a UdpServerConnection, did you mean to use UdpClientConnection?");
+        }
+
+        /// <summary>
+        ///     Sends a disconnect message to the end point.
+        /// </summary>
+        protected override bool SendDisconnect(MessageWriter data = null)
+        {
+            lock (this)
+            {
+                if (this._state != ConnectionState.Connected)
+                {
+                    return false;
+                }
+
+                this._state = ConnectionState.NotConnected;
+            }
+            
+            var bytes = EmptyDisconnectBytes;
+            if (data != null && data.Length > 0)
+            {
+                if (data.SendOption != SendOption.None) throw new ArgumentException("Disconnect messages can only be unreliable.");
+
+                bytes = data.ToByteArray(true);
+                bytes[0] = (byte)UdpSendOption.Disconnect;
+            }
+
+            try
+            {
+                Listener.SendDataSync(bytes, bytes.Length, EndPoint);
+            }
+            catch { }
+
+            return true;
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            Listener.RemoveConnectionTo(EndPoint);
+
+            if (disposing)
+            {
+                SendDisconnect();
+            }
+
+            base.Dispose(disposing);
+        }
+    }
+}
-- 
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