LANCommander.Interposer 1.2.1

LANCommander.Interposer

.NET bindings for LANCommander Interposer - a Windows DLL that hooks into game processes to provide virtual registry, file redirection, DNS redirection, identity overrides, FastDL, and Discord rich presence for LAN gaming.

Everything goes through InterposerService:

• Injection - Launch processes with ProcessStartInfo or inject into running Process instances, with optional runtime overrides for username, computer name, and FastDL URL.
• Plugin API - Logging, config, virtual registry, and rich presence (in-process only).
• Hook Events - Subscribe to file, registry, DNS, network, and identity events (in-process only).

Launch and Inject

using System.Diagnostics;
using LANCommander.Interposer;

using var interposer = new InterposerService();
interposer.Username = "Player1";
interposer.ComputerName = "GAMEPC";
interposer.FastDlUrl = "http://fastdl.lan/";

// Launch suspended, inject the DLL, resume - returns a standard Process
var startInfo = new ProcessStartInfo(@"C:\Games\game.exe", "-fullscreen");
Process game = interposer.Start(startInfo);

// Or inject into an already-running process
interposer.Inject(existingProcess);
interposer.Inject(1234);  // by PID

The DLL is located automatically next to the application (interposer.dll or LANCommander.Interposer.dll). Pass an explicit path to override:

interposer.Start(startInfo, dllPath: @"C:\Tools\LANCommander.Interposer.dll");

Plugin API (in-process)

These methods are only callable from within a process that has the Interposer DLL loaded.

using var interposer = new InterposerService();

interposer.Log("[MANAGED]      ", "Hello from .NET!");

string setting = interposer.GetConfigString("Plugins.MyPlugin.ApiKey");
interposer.RegisterPluginConfig("MyPlugin", "ApiKey: ''\nEnabled: true");

string username = interposer.GetUsername();

interposer.SetRegistryValue(
    @"HKEY_LOCAL_MACHINE\SOFTWARE\MyGame", "CDKey", "ABCD-1234-EFGH");

interposer.SetPresenceName("My Game");
interposer.SetPresenceDetails("Playing on de_dust2");
interposer.UpdatePresence();

Hook Events (in-process)

Subscribe to hook events from within an injected process. Events fire on the game's thread - subscribers must be thread-safe.

using LANCommander.Interposer;
using LANCommander.Interposer.Events;

using var interposer = new InterposerService();
interposer.EnableEvents();

interposer.FileAccessed += (s, e) =>
    Console.WriteLine($"{e.Verb}: {e.Path}");
interposer.RegistryAccessed += (s, e) =>
    Console.WriteLine($"{e.Verb}: {e.KeyPath} -> {e.ValueName}");
interposer.DnsResolved += (s, e) =>
    Console.WriteLine($"DNS: {e.Hostname} -> {e.RedirectedHostname}");
interposer.NetworkConnection += (s, e) =>
    Console.WriteLine($"Connect: {e.Address}:{e.Port}");
interposer.IdentityQueried += (s, e) =>
    Console.WriteLine($"{e.IdentityType}: {e.Value}");

FileEventArgs.SecondaryPath carries the fully resolved redirect target for FILE REDIRECT - capture groups and %TOKEN% references are already expanded. The redirect diagnostics emitted at Logging.Level Debug and Trace (REDIRECT HIT, REDIRECT MISS, REDIRECT RULE) go to the session log only and never reach this event stream.

Requirements

• Windows - The Interposer DLL and injection APIs are Windows-only.
• .NET 8.0 / 9.0 / 10.0 - Targets modern .NET runtimes.
• The native LANCommander.Interposer.dll (or proxy variant) must be deployed alongside the target process. Download it from Releases.

License

MIT