1 files changed, 0 insertions, 123 deletions
diff --git a/src/Agent.Windows/Network/LoopbackExemption.cs b/src/Agent.Windows/Network/LoopbackExemption.cs
deleted file mode 100644
index a3c68ba..0000000
--- a/src/Agent.Windows/Network/LoopbackExemption.cs
+++ /dev/null
@@ -1,123 +0,0 @@
-using System.ComponentModel;
-using System.Runtime.InteropServices;
-using System.Security.Principal;
-using Windows.Win32;
-using Windows.Win32.Foundation;
-using Windows.Win32.Security;
-using Windows.Win32.System.Memory;
-
-namespace Agent.Windows.Network;
-
-internal static unsafe class LoopbackExemption
-{
-    private const string MutexName = "Local\\AgentSandboxMcpLoopbackExemption";
-
-    public static bool Contains(SecurityIdentifier sid)
-    {
-        using MutexLease mutex = AcquireMutex();
-        return Read().Any(item => item.Sid.Equals(sid));
-    }
-
-    public static bool Ensure(SecurityIdentifier sid)
-    {
-        using MutexLease mutex = AcquireMutex();
-        List<Entry> entries = Read();
-        if (entries.Any(item => item.Sid.Equals(sid))) return false;
-        entries.Add(new(sid, 0));
-        Write(entries);
-        return true;
-    }
-
-    public static void Remove(SecurityIdentifier sid)
-    {
-        using MutexLease mutex = AcquireMutex();
-        List<Entry> entries = Read();
-        if (entries.RemoveAll(item => item.Sid.Equals(sid)) == 0) return;
-        Write(entries);
-    }
-
-    private static MutexLease AcquireMutex()
-    {
-        var mutex = new Mutex(false, MutexName);
-        try
-        {
-            try
-            {
-                if (!mutex.WaitOne(TimeSpan.FromSeconds(30))) throw new TimeoutException("Timed out waiting for the loopback exemption lock.");
-            }
-            catch (AbandonedMutexException)
-            {
-                // Ownership is granted to this thread when the prior owner died.
-            }
-            return new(mutex);
-        }
-        catch
-        {
-            mutex.Dispose();
-            throw;
-        }
-    }
-
-    private static List<Entry> Read()
-    {
-        uint result = PInvoke.NetworkIsolationGetAppContainerConfig(out uint count, out SID_AND_ATTRIBUTES* native);
-        ThrowIfError(result, "NetworkIsolationGetAppContainerConfig");
-        try
-        {
-            var entries = new List<Entry>(checked((int)count));
-            for (uint index = 0; index < count; index++)
-            {
-                SID_AND_ATTRIBUTES item = native[index];
-                entries.Add(new(new SecurityIdentifier((nint)item.Sid.Value), item.Attributes));
-            }
-            return entries;
-        }
-        finally
-        {
-            HANDLE heap = PInvoke.GetProcessHeap();
-            for (uint index = 0; index < count; index++)
-                if (native[index].Sid.Value is not null) _ = PInvoke.HeapFree(heap, HEAP_FLAGS.HEAP_NONE, native[index].Sid.Value);
-            if (native is not null) _ = PInvoke.HeapFree(heap, HEAP_FLAGS.HEAP_NONE, native);
-        }
-    }
-
-    private static void Write(IReadOnlyList<Entry> entries)
-    {
-        var native = new SID_AND_ATTRIBUTES[entries.Count];
-        var allocations = new List<nint>(entries.Count);
-        try
-        {
-            for (int index = 0; index < entries.Count; index++)
-            {
-                byte[] bytes = new byte[entries[index].Sid.BinaryLength];
-                entries[index].Sid.GetBinaryForm(bytes, 0);
-                void* allocation = NativeMemory.Alloc((nuint)bytes.Length);
-                Marshal.Copy(bytes, 0, (nint)allocation, bytes.Length);
-                allocations.Add((nint)allocation);
-                native[index].Sid = new PSID(allocation);
-                native[index].Attributes = entries[index].Attributes;
-            }
-            ThrowIfError(PInvoke.NetworkIsolationSetAppContainerConfig(native), "NetworkIsolationSetAppContainerConfig");
-        }
-        finally
-        {
-            foreach (nint allocation in allocations) NativeMemory.Free((void*)allocation);
-        }
-    }
-
-    private static void ThrowIfError(uint result, string operation)
-    {
-        if (result != 0) throw new Win32Exception(unchecked((int)result), $"{operation} failed with Win32 error 0x{result:X8}.");
-    }
-
-    private sealed record Entry(SecurityIdentifier Sid, uint Attributes);
-
-    private sealed class MutexLease(Mutex mutex) : IDisposable
-    {
-        public void Dispose()
-        {
-            mutex.ReleaseMutex();
-            mutex.Dispose();
-        }
-    }
-}