Various fixes, stability, new features:

* Added EchoRelay.Cli, a lightweight, more performant, naive multi-platform commandline app similar to EchoRelay.App
* Added optional game server endpoint validation (rejecting game servers at registration time if their game server port is not open).
* Added checks to enforce only 4v4 in public Echo Arena and Echo Combat matches (it's not 'correct', but it works).
* Added game executable version checks to EchoRelay.Patch, warning users if their game version is incorrect on start.
* Added "[DEMO]" suffix to window title when using -noovr, to distinguish OVR/NoOVR.
* Changed disable AFK timeout to be enabled by default for new accounts.
* Fixed -headless high CPU usage
* Added a -timestep argument for -headless, to set a fixed tickrate per second (default 120).
* Fixed EchoRelay.GameServer unloading so it can properly be unloaded now without needing to force quit.
* Hooked game server's "fail to load level" to instead re-create sessions, so requests for non-existent levels/gametypes cannot crash/trap game servers at a failed to load level screen.
* Various more bug fixes, including a thread deadlock issue in EchoRelay.App when games would end, causing large state transitions in the app (this example app still isn't great for that)
* Added unfinished AI/bot code.

Author: Xenomega

.gitignore

@@ -236,3 +236,6 @@ ipch/
 
 # Nuget package cache
 packages/
+
+# EchoRelay.Cli
+EchoRelay.Cli/Properties/launchSettings.json

Directory.Build.targets

@@ -0,0 +1,13 @@
+ <Project>
+    <PropertyGroup>
+        <!--
+        If you intend to derive from this project, please give credit to the original repository (https://github.com/Xenomega/EchoRelay)
+        as stated in the README, and distinguish your project from mine (the original), so I am not confused as the author of your project/fork.
+        Thank you,
+        ~Xenomega (David Pokora)
+        -->
+        <Authors>Xenomega (David Pokora)</Authors>
+        <Company>Xenomega (David Pokora)</Company>
+        <Version>0.7.0</Version>
+    </PropertyGroup>
+  </Project>

EchoRelay.App/EchoRelay.App.csproj

@@ -6,6 +6,8 @@
     <Nullable>enable</Nullable>
     <UseWindowsForms>true</UseWindowsForms>
     <ImplicitUsings>enable</ImplicitUsings>
+    <RepositoryUrl>https://github.com/Xenomega/EchoRelay</RepositoryUrl>
+    <Authors>Xenomega (David Pokora)</Authors>
   </PropertyGroup>
 
   <ItemGroup>

EchoRelay.App/Forms/Controls/GameServersControl.cs

@@ -29,6 +29,10 @@ public GameServersControl()
 
         public void AddOrUpdateGameServer(RegisteredGameServer gameServer)
         {
+            // If the peer isn't connected, this might've been triggered out of order, do nothing.
+            if (!gameServer.Peer.Connected)
+                return;
+
             // Obtain an existing list view item for this game server, or create one.
             ListViewItem? listItem = null;
             if (!_items.TryGetValue(gameServer.ServerId, out listItem))
@@ -60,7 +64,7 @@ public void AddOrUpdateGameServer(RegisteredGameServer gameServer)
             {
                 listItem.SubItems[4].Text = "-";
             }
-            listItem.SubItems[5].Text = $"{gameServer.SessionPlayerCount}/{gameServer.SessionPlayerLimit}";
+            listItem.SubItems[5].Text = $"{gameServer.SessionPlayerCount}/{gameServer.SessionPlayerLimits.TotalPlayerLimit}";
             listItem.SubItems[6].Text = gameServer.SessionLobbyType.ToString();
             listItem.SubItems[7].Text = gameServer.SessionLocked.ToString();
             listItem.SubItems[8].Text = gameServer.SessionChannel?.ToString() ?? "-";
@@ -90,7 +94,7 @@ private void listGameServers_SelectedIndexChanged(object sender, EventArgs e)
             listGameServers.ContextMenuStrip = listGameServers.SelectedItems.Count > 0 ? contextMenuGameServers : null;
         }
 
-        private void RefreshSelectedGameServer()
+        private async void RefreshSelectedGameServer()
         {
             // Obtain the selected item, if any.
             ListViewItem? selectedItem = null;
@@ -105,7 +109,7 @@ private void RefreshSelectedGameServer()
             {
                 // Create items for every player in the game server.
                 RegisteredGameServer selectedGameServer = (RegisteredGameServer)selectedItem.Tag;
-                var playersInfo = selectedGameServer.GetPlayers().Result;
+                var playersInfo = await selectedGameServer.GetPlayers();
                 foreach (var playerInfo in playersInfo)
                 {
                     // Create a list item for this player

EchoRelay.App/Forms/Controls/PeerConnectionsControl.cs

@@ -29,6 +29,10 @@ public PeerConnectionsControl()
 
         public void AddOrUpdatePeer(Peer peer)
         {
+            // If the peer isn't connected, this might've been triggered out of order, do nothing.
+            if (!peer.Connected)
+                return;
+
             // Obtain an existing list view item for this peer, or create one.
             ListViewItem? listItem = null;
             if (!_items.TryGetValue(peer.Id, out listItem))

EchoRelay.App/Forms/Controls/ServerInfoControl.cs

@@ -1,4 +1,5 @@
 using EchoRelay.Core.Server;
+using EchoRelay.Core.Utils;
 using Newtonsoft.Json;
 
 namespace EchoRelay.App.Forms.Controls
@@ -28,7 +29,7 @@ public void UpdateServerInfo(Server? server, bool updateServiceConfig)
                 if (server != null)
                 {
                     string hostName = server.PublicIPAddress?.ToString() ?? "localhost";
-                    rtbGeneratedServiceConfig.Text = JsonConvert.SerializeObject(server.Settings.GenerateServiceConfig(hostName), Formatting.Indented);
+                    rtbGeneratedServiceConfig.Text = JsonConvert.SerializeObject(server.Settings.GenerateServiceConfig(hostName, serverConfig: true), Formatting.Indented, StreamIO.JsonSerializerSettings);
                 }
                 else
                 {