Added ConnectionEvent

core/src/mindustry/core/NetServer.java

@@ -81,6 +81,8 @@ public class NetServer implements ApplicationListener{
     public NetServer(){
 
         net.handleServer(Connect.class, (con, connect) -> {
+            Events.fire(new ConnectionEvent(con));
+
             if(admins.isIPBanned(connect.addressTCP) || admins.isSubnetBanned(connect.addressTCP)){
                 con.kick(KickReason.banned);
             }

core/src/mindustry/game/EventType.java

@@ -383,6 +383,15 @@ public class EventType{
         }
     }
 
+    /** Called when a connection is established to a client. */
+    public static class ConnectionEvent{
+        public final NetConnection connection;
+
+        public ConnectionEvent(NetConnection connection){
+            this.connection = connection;
+        }
+    }
+
     /** Called after connecting; when a player receives world data and is ready to play.*/
     public static class PlayerJoin{
         public final Player player;