Proper client timeout detection

Port From (https://github.com/TrinityCore/TrinityCore/commit/2c3fc47a96baa8a47130befda647bf29d8eacce1)

Source/Framework/Constants/SharedConst.cs

@@ -1335,7 +1335,8 @@ namespace Framework.Constants
         SkillMilling,
         SkillProspecting,
         SkipCinematics,
-        SocketTimeouttime,
+        SocketTimeoutTime,
+        SocketTimeoutTimeActive,
         StartAllExplored,
         StartAllRep,
         StartAllSpells,

Source/Game/Networking/WorldSocket.cs

@@ -237,6 +237,10 @@ namespace Game.Networking
                         authContinuedSession.Read();
                         HandleAuthContinuedSession(authContinuedSession);
                         break;
+                    case ClientOpcodes.KeepAlive:
+                        if (_worldSession != null)
+                            _worldSession.ResetTimeOutTime(true);
+                        break;
                     case ClientOpcodes.LogDisconnect:
                         break;
                     case ClientOpcodes.EnableNagle:
@@ -264,9 +268,8 @@ namespace Game.Networking
                             break;
                         }
 
-                        // Our Idle timer will reset on any non PING opcodes.
-                        // Catches people idling on the login screen and any lingering ingame connections.
-                        _worldSession.ResetTimeOutTime();
+                        // Our Idle timer will reset on any non PING opcodes on login screen, allowing us to catch people idling.
+                        _worldSession.ResetTimeOutTime(false);
                         _worldSession.QueuePacket(packet);
                         break;
                 }

Source/Game/Server/WorldConfig.cs

@@ -289,7 +289,8 @@ namespace Game
                 Values[WorldCfg.PortInstance] = GetDefaultValue("InstanceServerPort", 8086);
             }
 
-            Values[WorldCfg.SocketTimeouttime] = GetDefaultValue("SocketTimeOutTime", 900000);
+            Values[WorldCfg.SocketTimeoutTime] = GetDefaultValue("SocketTimeOutTime", 900000);
+            Values[WorldCfg.SocketTimeoutTimeActive] = GetDefaultValue("SocketTimeOutTimeActive", 60000);
             Values[WorldCfg.SessionAddDelay] = GetDefaultValue("SessionAddDelay", 10000);
 
             Values[WorldCfg.GroupXpDistance] = GetDefaultValue("MaxGroupXPDistance", 74.0f);

Source/Game/Server/WorldManager.cs

@@ -267,7 +267,7 @@ namespace Game
                 else
                 {
                     sess.SetInQueue(false);
-                    sess.ResetTimeOutTime();
+                    sess.ResetTimeOutTime(false);
                     m_QueuedPlayer.Remove(iter);
                     found = true;                                   // removing queued session
                     break;

Source/Game/Server/WorldSession.cs

@@ -60,7 +60,7 @@ namespace Game
             _collectionMgr = new CollectionMgr(this);
 
             m_Address = sock.GetRemoteIpAddress().ToString();
-            ResetTimeOutTime();
+            ResetTimeOutTime(false);
             DB.Login.Execute("UPDATE account SET online = 1 WHERE id = {0};", GetAccountId());     // One-time query
         }
 
@@ -240,7 +240,8 @@ namespace Game
             UpdateTimeOutTime(diff);
 
             // Before we process anything:
-            // If necessary, kick the player from the character select screen
+            /// If necessary, kick the player because the client didn't send anything for too long
+            /// (or they've been idling in character select)
             if (IsConnectionIdle())
                 m_Socket[(int)ConnectionType.Realm].CloseSocket();
 
@@ -737,7 +738,7 @@ namespace Game
                 SendAuthWaitQue(0);
 
             SetInQueue(false);
-            ResetTimeOutTime();
+            ResetTimeOutTime(false);
 
             SendSetTimeZoneInformation();
             SendFeatureSystemStatusGlueScreen();
@@ -815,7 +816,13 @@ namespace Game
             else
                 m_timeOutTime -= diff;
         }
-        public void ResetTimeOutTime() { m_timeOutTime = WorldConfig.GetIntValue(WorldCfg.SocketTimeouttime); }
+        public void ResetTimeOutTime(bool onlyActive)
+        {
+            if (GetPlayer())
+                m_timeOutTime = WorldConfig.GetIntValue(WorldCfg.SocketTimeoutTimeActive);
+            else if (!onlyActive)
+                m_timeOutTime = WorldConfig.GetIntValue(WorldCfg.SocketTimeoutTime);
+        }
         bool IsConnectionIdle() { return (m_timeOutTime <= 0 && !m_inQueue); }
 
         public uint GetRecruiterId() { return recruiterId; }

Source/WorldServer/WorldServer.conf.dist

@@ -315,6 +315,15 @@ InstanceMapLoadAllGrids = 0
 
 SocketTimeOutTime = 900000
 
+#
+#    SocketTimeOutTimeActive
+#        Description: Time (in milliseconds) after which an idle connection is dropped while
+#                     logged into the world.
+#                     The client sends keepalive packets every 30 seconds. Values <= 30s are not recommended.
+#        Default:     60000 - (1 minute)
+
+SocketTimeOutTimeActive = 60000
+
 #
 #    SessionAddDelay
 #        Description: Time (in microseconds) that a network thread will sleep after authentication