Handle NMT Login packet

src/Prospect.Unreal/Core/FEngineVersion.cs

@@ -1,5 +1,4 @@
-using Prospect.Unreal.Net;
-using Prospect.Unreal.Serialization;
+using Prospect.Unreal.Serialization;
 
 namespace Prospect.Unreal.Core;
 

src/Prospect.Unreal/Core/FString.cs

@@ -41,13 +41,23 @@ public static class FString
         }
         else
         {
-            var num = value.Length + 1;
-            var valueBytes = num > 128 ? new byte[num] : stackalloc byte[num];
+            var num = value.Length;
+            if (num != 0)
+            {
+                // Add null terminator.
+                num += 1;
+                
+                var valueBytes = num > 128 ? new byte[num] : stackalloc byte[num];
             
-            Encoding.ASCII.GetBytes(value, valueBytes);
+                Encoding.ASCII.GetBytes(value, valueBytes);
             
-            archive.WriteInt32(num);
-            archive.Serialize(valueBytes, num);
+                archive.WriteInt32(num);
+                archive.Serialize(valueBytes, num);
+            }
+            else
+            {
+                archive.WriteInt32(0);
+            }
         }
     }
     

src/Prospect.Unreal/Core/FUrl.cs

@@ -1,14 +1,75 @@
 using System.Net;
+using System.Text;
 
 namespace Prospect.Unreal.Core;
 
 public class FUrl
 {
-    public string Protocol { get; set; } = "unreal";
-    public IPAddress Host { get; set; } = IPAddress.Any;
-    public int Port { get; set; } = 7777;
-    public string Map { get; set; } = "GearStart";
+    private const string DefaultProtocol = "unreal";
+    private static readonly IPAddress DefaultHost = IPAddress.Any;
+    private const int DefaultPort = 7777;
+    
+    public string Protocol { get; set; } = DefaultProtocol;
+    public IPAddress Host { get; set; } = DefaultHost;
+    public int Port { get; set; } = DefaultPort;
+    public string Map { get; set; } = "GearStart"; // TODO: UGameMapsSettings::GetGameDefaultMap()
     public string RedirectUrl { get; set; } = string.Empty;
     public List<string> Options { get; set; } = new List<string>();
     public string Portal { get; set; } = string.Empty;
+    public bool Valid { get; set; } = true;
+
+    public string ToString(bool fullyQualified)
+    {
+        var result = new StringBuilder();
+        
+        // Emit protocol.
+        if ((Protocol != DefaultProtocol) || fullyQualified)
+        {
+            result.Append(Protocol);
+            result.Append(':');
+
+            if (!Equals(Host, DefaultHost))
+            {
+                result.Append("//");
+            }
+        }
+        
+        // Emit host and port
+        if (!Equals(Host, DefaultHost) || (Port != DefaultPort))
+        {
+            result.Append(Port);
+
+            if (!Map.StartsWith("/") && !Map.StartsWith("\\"))
+            {
+                result.Append('/');
+            }
+        }
+
+        // Emit map.
+        if (!string.IsNullOrEmpty(Map))
+        {
+            result.Append(Map);
+        }
+
+        // Emit options.
+        foreach (var option in Options)
+        {
+            result.Append('?');
+            result.Append(option);
+        }
+        
+        // Emit portal.
+        if (!string.IsNullOrEmpty(Portal))
+        {
+            result.Append('#');
+            result.Append(Portal);
+        }
+
+        return result.ToString();
+    }
+    
+    public override string ToString()
+    {
+        return ToString(false);
+    }
 }