More session handling code added.

FFXIVClassic Proxy Server/Packets/Receive/HelloPacket.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFXIVClassic_World_Server.Packets.Receive
+{
+    class HelloPacket
+    {
+        public bool invalidPacket = false;
+        public uint sessionId;
+
+        public HelloPacket(byte[] data)
+        {
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryReader binReader = new BinaryReader(mem))
+                {
+                    try
+                    {
+                        byte[] readIn = new byte[12];
+                        binReader.BaseStream.Seek(0x14, SeekOrigin.Begin);
+                        binReader.Read(readIn, 0, 12);
+                        sessionId = UInt32.Parse(Encoding.ASCII.GetString(readIn));
+                    }
+                    catch (Exception)
+                    {
+                        invalidPacket = true;
+                    }
+                }
+            }
+        }
+    }
+}