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Assets/Mirror/Examples/AutoLANClientController/Scripts/AutoLANNetworkDiscovery.cs

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+using System;
+using System.Net;
+using UnityEngine;
+using UnityEngine.Events;
+using Mirror.Discovery;
+
+
+//[Serializable]
+//public class ServerFoundUnityEvent<TResponseType> : UnityEvent<TResponseType> { };
+namespace Mirror.Examples.AutoLANClientController
+{
+    [DisallowMultipleComponent]
+    [AddComponentMenu("Network/Network Discovery")]
+    public class AutoLANNetworkDiscovery : NetworkDiscoveryBase<ServerRequest, ServerResponse>
+    {
+        #region Server
+        public CanvasHUD canvasHUD;
+
+        /// <summary>
+        /// Process the request from a client
+        /// </summary>
+        /// <remarks>
+        /// Override if you wish to provide more information to the clients
+        /// such as the name of the host player
+        /// </remarks>
+        /// <param name="request">Request coming from client</param>
+        /// <param name="endpoint">Address of the client that sent the request</param>
+        /// <returns>The message to be sent back to the client or null</returns>
+        protected override ServerResponse ProcessRequest(ServerRequest request, IPEndPoint endpoint)
+        {
+            // In this case we don't do anything with the request
+            // but other discovery implementations might want to use the data
+            // in there,  This way the client can ask for
+            // specific game mode or something
+
+            try
+            {
+                // this is an example reply message,  return your own
+                // to include whatever is relevant for your game
+                return new ServerResponse
+                {
+                    serverId = ServerId,
+                    uri = transport.ServerUri()
+                };
+            }
+            catch (NotImplementedException)
+            {
+                Debug.LogError($"Transport {transport} does not support network discovery");
+                throw;
+            }
+        }
+
+        #endregion
+
+        #region Client
+
+        /// <summary>
+        /// Create a message that will be broadcasted on the network to discover servers
+        /// </summary>
+        /// <remarks>
+        /// Override if you wish to include additional data in the discovery message
+        /// such as desired game mode, language, difficulty, etc... </remarks>
+        /// <returns>An instance of ServerRequest with data to be broadcasted</returns>
+        protected override ServerRequest GetRequest() => new ServerRequest();
+
+        /// <summary>
+        /// Process the answer from a server
+        /// </summary>
+        /// <remarks>
+        /// A client receives a reply from a server, this method processes the
+        /// reply and raises an event
+        /// </remarks>
+        /// <param name="response">Response that came from the server</param>
+        /// <param name="endpoint">Address of the server that replied</param>
+        protected override void ProcessResponse(ServerResponse response, IPEndPoint endpoint)
+        {
+            // we received a message from the remote endpoint
+            response.EndPoint = endpoint;
+
+            // although we got a supposedly valid url, we may not be able to resolve
+            // the provided host
+            // However we know the real ip address of the server because we just
+            // received a packet from it,  so use that as host.
+            UriBuilder realUri = new UriBuilder(response.uri)
+            {
+                Host = response.EndPoint.Address.ToString()
+            };
+            response.uri = realUri.Uri;
+
+            //OnServerFound.Invoke(response);
+            if (canvasHUD == null)
+            {
+#if UNITY_2022_2_OR_NEWER
+                canvasHUD = GameObject.FindAnyObjectByType<CanvasHUD>();
+#else
+                // Deprecated in Unity 2023.1
+                canvasHUD = GameObject.FindObjectOfType<CanvasHUD>();
+#endif
+            }
+            canvasHUD.OnDiscoveredServer(response);
+        }
+
+        #endregion
+    }
+}