Built subpackets to let the zone servers talk to the world server. Implemented cross-server zoning but the E2 packet or something isn't being sent.

FFXIVClassic Map Server/packets/WorldPackets/Send/SessionBeginConfirmPacket.cs

@@ -0,0 +1,27 @@
+using FFXIVClassic.Common;
+using FFXIVClassic_Map_Server.dataobjects;
+using System;
+using System.IO;
+
+namespace  FFXIVClassic_Map_Server.packets.WorldPackets.Send
+{
+    class SessionBeginConfirmPacket
+    {
+        public const ushort OPCODE = 0x1000;
+        public const uint PACKET_SIZE = 0x28;
+
+        public static SubPacket BuildPacket(Session session, ushort errorCode = 0)
+        {
+            byte[] data = new byte[PACKET_SIZE - 0x20];
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryWriter binWriter = new BinaryWriter(mem))
+                {
+                    binWriter.Write((UInt32)session.id);
+                    binWriter.Write((UInt16)errorCode);
+                }
+            }
+            return new SubPacket(true, OPCODE, 0, session.id, data);
+        }
+    }
+}