If a player tries to zone to a offline server they will see a standard error message. Also a reconnection attempt will be made on a disconnected server.

FFXIVClassic Map Server/FFXIVClassic Map Server.csproj

@@ -256,6 +256,7 @@
     <Compile Include="packets\send\_0xE2Packet.cs" />
     <Compile Include="packets\receive\PingPacket.cs" />
     <Compile Include="packets\receive\UpdatePlayerPositionPacket.cs" />
+    <Compile Include="packets\WorldPackets\Receive\ErrorPacket.cs" />
     <Compile Include="packets\WorldPackets\Receive\SessionEndPacket.cs" />
     <Compile Include="packets\WorldPackets\Receive\SessionBeginPacket.cs" />
     <Compile Include="packets\WorldPackets\Send\SessionBeginConfirmPacket.cs" />

FFXIVClassic Map Server/PacketProcessor.cs

@@ -42,6 +42,16 @@ namespace FFXIVClassic_Map_Server
                 //Normal Game Opcode
                 switch (subpacket.gameMessage.opcode)
                 {
+                    //World Server - Error
+                    case 0x100A:
+                        ErrorPacket worldError = new ErrorPacket(subpacket.data);
+                        switch (worldError.errorCode)
+                        {
+                            case 0x01:
+                                session.GetActor().SendGameMessage(Server.GetWorldManager().GetActor(), 60005, 0x20);
+                                break;
+                        }
+                        break;
                     //World Server - Session Begin
                     case 0x1000:
                         subpacket.DebugPrintSubPacket();

FFXIVClassic Map Server/WorldManager.cs

@@ -361,13 +361,6 @@ namespace FFXIVClassic_Map_Server
         //Moves actor to new zone, and sends packets to spawn at the given coords.
         public void DoZoneChange(Player player, uint destinationZoneId, string destinationPrivateArea, byte spawnType, float spawnX, float spawnY, float spawnZ, float spawnRotation)
         {       
-            Area oldZone = player.zone;
-            //Remove player from currentZone if transfer else it's login
-            if (player.zone != null)
-            {
-                oldZone.RemoveActorFromZone(player);
-            }
-
             //Add player to new zone and update
             Area newArea;
 
@@ -379,16 +372,18 @@ namespace FFXIVClassic_Map_Server
             //This server does not contain that zoneId
             if (newArea == null)
             {
-                if (oldZone != null)
-                {
-                    oldZone.AddActorToZone(player);
-                }
-
                 Program.Log.Debug("Request to change to zone not on this server by: {0}.", player.customDisplayName);
                 RequestWorldServerZoneChange(player, destinationZoneId, spawnType, spawnX, spawnY, spawnZ, spawnRotation);
                 return;
             }
 
+            Area oldZone = player.zone;
+            //Remove player from currentZone if transfer else it's login
+            if (player.zone != null)
+            {
+                oldZone.RemoveActorFromZone(player);
+            }
+
             newArea.AddActorToZone(player);
 
             //Update player actor's properties

FFXIVClassic Map Server/actors/chara/player/Player.cs

@@ -749,7 +749,7 @@ namespace FFXIVClassic_Map_Server.Actors
 
         public void SendGameMessage(Actor sourceActor, Actor textIdOwner, ushort textId, byte log, params object[] msgParams)
         {
-            if (msgParams.Length == 0)
+            if (msgParams == null || msgParams.Length == 0)
             {
                 QueuePacket(GameMessagePacket.BuildPacket(Server.GetWorldManager().GetActor().actorId, actorId, sourceActor.actorId, textIdOwner.actorId, textId, log));
             }
@@ -759,7 +759,7 @@ namespace FFXIVClassic_Map_Server.Actors
 
         public void SendGameMessage(Actor textIdOwner, ushort textId, byte log, params object[] msgParams)
         {
-            if (msgParams.Length == 0)
+            if (msgParams == null || msgParams.Length == 0)
                 QueuePacket(GameMessagePacket.BuildPacket(Server.GetWorldManager().GetActor().actorId, actorId, textIdOwner.actorId, textId, log));
             else
                 QueuePacket(GameMessagePacket.BuildPacket(Server.GetWorldManager().GetActor().actorId, actorId, textIdOwner.actorId, textId, log, LuaUtils.CreateLuaParamList(msgParams)));
@@ -767,7 +767,7 @@ namespace FFXIVClassic_Map_Server.Actors
 
         public void SendGameMessage(Actor textIdOwner, ushort textId, byte log, string customSender, params object[] msgParams)
         {
-            if (msgParams.Length == 0)
+            if (msgParams == null || msgParams.Length == 0)
                 QueuePacket(GameMessagePacket.BuildPacket(Server.GetWorldManager().GetActor().actorId, actorId, textIdOwner.actorId, textId, customSender, log));
             else
                 QueuePacket(GameMessagePacket.BuildPacket(Server.GetWorldManager().GetActor().actorId, actorId, textIdOwner.actorId, textId, customSender, log, LuaUtils.CreateLuaParamList(msgParams)));
@@ -775,7 +775,7 @@ namespace FFXIVClassic_Map_Server.Actors
 
         public void SendGameMessage(Actor textIdOwner, ushort textId, byte log, uint displayId, params object[] msgParams)
         {
-            if (msgParams.Length == 0)
+            if (msgParams == null || msgParams.Length == 0)
                 QueuePacket(GameMessagePacket.BuildPacket(Server.GetWorldManager().GetActor().actorId, actorId, textIdOwner.actorId, textId, displayId, log));
             else
                 QueuePacket(GameMessagePacket.BuildPacket(Server.GetWorldManager().GetActor().actorId, actorId, textIdOwner.actorId, textId, displayId, log, LuaUtils.CreateLuaParamList(msgParams)));

FFXIVClassic Map Server/packets/WorldPackets/Receive/ErrorPacket.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFXIVClassic_Map_Server.packets.WorldPackets.Receive
+{
+    class ErrorPacket
+    {
+        public uint errorCode;
+       
+        public bool invalidPacket = false;
+
+        public ErrorPacket(byte[] data)
+        {
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryReader binReader = new BinaryReader(mem))
+                {
+                    try
+                    {
+                        errorCode = binReader.ReadUInt32();                        
+                    }
+                    catch (Exception)
+                    {
+                        invalidPacket = true;
+                    }
+                }
+            }
+
+        }
+    }
+}

FFXIVClassic World Server/DataObjects/ZoneServer.cs

@@ -35,7 +35,7 @@ namespace FFXIVClassic_World_Server.DataObjects
             ownedZoneIds.Add(id);
         }
 
-        public void Connect()
+        public bool Connect()
         {
             Program.Log.Info("Connecting to zone server @ {0}:{1}", zoneServerIp, zoneServerPort);
             IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse(zoneServerIp), zoneServerPort);
@@ -60,7 +60,9 @@ namespace FFXIVClassic_World_Server.DataObjects
                 }
             }
             catch (Exception e)
-            { Program.Log.Error("Failed to connect"); return; }            
+            { Program.Log.Error("Failed to connect"); return false; }
+
+            return true;
         }
 
         public void SendPacket(SubPacket subpacket)

FFXIVClassic World Server/FFXIVClassic World Server.csproj

@@ -77,6 +77,7 @@
     <Compile Include="Packets\WorldPackets\Receive\SessionBeginConfirmPacket.cs" />
     <Compile Include="Packets\WorldPackets\Receive\WorldRequestZoneChangePacket.cs" />
     <Compile Include="Packets\WorldPackets\Receive\SessionEndConfirmPacket.cs" />
+    <Compile Include="Packets\WorldPackets\Send\ErrorPacket.cs" />
     <Compile Include="Packets\WorldPackets\Send\SessionBeginPacket.cs" />
     <Compile Include="Packets\WorldPackets\Send\SessionEndPacket.cs" />
     <Compile Include="Program.cs" />

FFXIVClassic World Server/Packets/WorldPackets/Send/ErrorPacket.cs

@@ -0,0 +1,37 @@
+using FFXIVClassic.Common;
+using FFXIVClassic_World_Server.DataObjects;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFXIVClassic_World_Server.Packets.WorldPackets.Send
+{
+    class ErrorPacket
+    {
+        public const ushort OPCODE = 0x100A;
+        public const uint PACKET_SIZE = 0x24;
+
+        public static SubPacket BuildPacket(Session session, uint errorCode)
+        {
+            byte[] data = new byte[PACKET_SIZE - 0x20];
+
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryWriter binWriter = new BinaryWriter(mem))
+                {
+                    try
+                    {
+                        binWriter.Write((UInt32)errorCode);
+                    }
+                    catch (Exception)
+                    { }
+                }
+            }
+
+            return new SubPacket(true, OPCODE, 0, session.sessionId, data);
+        }
+    }
+}

FFXIVClassic World Server/WorldMaster.cs

@@ -1,5 +1,6 @@
 using FFXIVClassic.Common;
 using FFXIVClassic_World_Server.DataObjects;
+using FFXIVClassic_World_Server.Packets.WorldPackets.Send;
 using MySql.Data.MySqlClient;
 using System;
 using System.Collections.Generic;
@@ -167,7 +168,13 @@ namespace FFXIVClassic_World_Server
         //Moves actor to new zone, and sends packets to spawn at the given coords.
         public void DoZoneServerChange(Session session, uint destinationZoneId, string destinationPrivateArea, byte spawnType, float spawnX, float spawnY, float spawnZ, float spawnRotation)
         {
+            ZoneServer zs = GetZoneServer(destinationZoneId);
+            if (zs.isConnected)
                 session.routing1.SendSessionEnd(session, destinationZoneId, destinationPrivateArea, spawnType, spawnX, spawnY, spawnZ, spawnRotation);
+            else if (zs.Connect())
+                session.routing1.SendSessionEnd(session, destinationZoneId, destinationPrivateArea, spawnType, spawnX, spawnY, spawnZ, spawnRotation);
+            else            
+                session.routing1.SendPacket(ErrorPacket.BuildPacket(session, 1));            
         }
 
         //Login Zone In