5 files changed, 139 insertions, 9 deletions
diff --git a/Ryujinx.Common/Logging/LogClass.cs b/Ryujinx.Common/Logging/LogClass.cs
index dc5bf7fe..b7130d23 100644
--- a/Ryujinx.Common/Logging/LogClass.cs
+++ b/Ryujinx.Common/Logging/LogClass.cs
@@ -37,6 +37,7 @@ namespace Ryujinx.Common.Logging
         ServiceLm,
         ServiceMm,
         ServiceNfp,
+        ServiceNgct,
         ServiceNifm,
         ServiceNim,
         ServiceNs,
diff --git a/Ryujinx.HLE/HOS/Services/Ngct/IService.cs b/Ryujinx.HLE/HOS/Services/Ngct/IService.cs
new file mode 100644
index 00000000..c12a8de8
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Ngct/IService.cs
@@ -0,0 +1,24 @@
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Services.Ngct
+{
+    [Service("ngct:u")] // 9.0.0+
+    class IService : IpcService
+    {
+        public IService(ServiceCtx context) { }
+
+        [Command(0)]
+        // Match(buffer<string, 9>) -> b8
+        public ResultCode Match(ServiceCtx context)
+        {
+            return NgctServer.Match(context);
+        }
+
+        [Command(1)]
+        // Filter(buffer<string, 9>) -> buffer<filtered_string, 10>
+        public ResultCode Filter(ServiceCtx context)
+        {
+            return NgctServer.Filter(context);
+        }
+    }
+}
+\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Ngct/IServiceWithManagementApi.cs b/Ryujinx.HLE/HOS/Services/Ngct/IServiceWithManagementApi.cs
new file mode 100644
index 00000000..732252ee
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Ngct/IServiceWithManagementApi.cs
@@ -0,0 +1,22 @@
+namespace Ryujinx.HLE.HOS.Services.Ngct
+{
+    [Service("ngct:s")] // 9.0.0+
+    class IServiceWithManagementApi : IpcService
+    {
+        public IServiceWithManagementApi(ServiceCtx context) { }
+
+        [Command(0)]
+        // Match(buffer<string, 9>) -> b8
+        public ResultCode Match(ServiceCtx context)
+        {
+            return NgctServer.Match(context);
+        }
+
+        [Command(1)]
+        // Filter(buffer<string, 9>) -> buffer<filtered_string, 10>
+        public ResultCode Filter(ServiceCtx context)
+        {
+            return NgctServer.Filter(context);
+        }
+    }
+}
+\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Ngct/IUnknown1.cs b/Ryujinx.HLE/HOS/Services/Ngct/IUnknown1.cs
deleted file mode 100644
index 2baec585..00000000
--- a/Ryujinx.HLE/HOS/Services/Ngct/IUnknown1.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-namespace Ryujinx.HLE.HOS.Services.Ngct
-{
-    [Service("ngct:s")] // 9.0.0+
-    [Service("ngct:u")] // 9.0.0+
-    class IUnknown1 : IpcService
-    {
-        public IUnknown1(ServiceCtx context) { }
-    }
-}
-\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Ngct/NgctServer.cs b/Ryujinx.HLE/HOS/Services/Ngct/NgctServer.cs
new file mode 100644
index 00000000..a1907d4f
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Ngct/NgctServer.cs
@@ -0,0 +1,92 @@
+using Ryujinx.Common.Logging;
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Services.Ngct
+{
+    static class NgctServer
+    {
+        public static ResultCode Match(ServiceCtx context)
+        {
+            // NOTE: Service load the values of sys:set ngc.t!functionality_override_enabled and ngc.t!auto_reload_enabled in internal fields.
+            //       Then it checks if ngc.t!functionality_override_enabled is enabled and if sys:set GetT is == 2.
+            //       If both conditions are true, it does this following code. Since we currently stub it, it's fine to don't check settings service values.
+
+            long bufferPosition = context.Request.PtrBuff[0].Position;
+            long bufferSize     = context.Request.PtrBuff[0].Size;
+
+            bool   isMatch = false;
+            string text    = "";
+
+            if (bufferSize != 0)
+            {
+                if (bufferSize > 1024)
+                {
+                    isMatch = true;
+                }
+                else
+                {
+                    byte[] buffer = new byte[bufferSize];
+
+                    context.Memory.Read((ulong)bufferPosition, buffer);
+
+                    text = Encoding.ASCII.GetString(buffer);
+
+                    // NOTE: Ngct use the archive 0100000000001034 which contains a words table. This is pushed on Chinese Switchs using Bcat service.
+                    //       This call check if the string match with entries in the table and return the result if there is one (or more).
+                    //       Since we don't want to hide bad words. It's fine to returns false here.
+
+                    isMatch = false;
+                }
+            }
+
+            Logger.Stub?.PrintStub(LogClass.ServiceNgct, new { isMatch, text });
+
+            context.ResponseData.Write(isMatch);
+
+            return ResultCode.Success;
+        }
+
+        public static ResultCode Filter(ServiceCtx context)
+        {
+            // NOTE: Service load the values of sys:set ngc.t!functionality_override_enabled and ngc.t!auto_reload_enabled in internal fields.
+            //       Then it checks if ngc.t!functionality_override_enabled is enabled and if sys:set GetT is == 2.
+            //       If both conditions are true, it does this following code. Since we currently stub it, it's fine to don't check settings service values.
+
+            long bufferPosition = context.Request.PtrBuff[0].Position;
+            long bufferSize     = context.Request.PtrBuff[0].Size;
+
+            long bufferFilteredPosition = context.Request.RecvListBuff[0].Position;
+
+            string text         = "";
+            string textFiltered = "";
+
+            if (bufferSize != 0)
+            {
+                if (bufferSize > 1024)
+                {
+                    textFiltered = new string('*', text.Length);
+
+                    context.Memory.Write((ulong)bufferFilteredPosition, Encoding.ASCII.GetBytes(textFiltered));
+                }
+                else
+                {
+                    byte[] buffer = new byte[bufferSize];
+
+                    context.Memory.Read((ulong)bufferPosition, buffer);
+
+                    // NOTE: Ngct use the archive 0100000000001034 which contains a words table. This is pushed on Chinese Switchs using Bcat service.
+                    //       This call check if the string contains words which are in the table then returns the same string with each matched words replaced by '*'.
+                    //       Since we don't want to hide bad words. It's fine to returns the same string.
+
+                    textFiltered = text = Encoding.ASCII.GetString(buffer);
+
+                    context.Memory.Write((ulong)bufferFilteredPosition, buffer);
+                }
+            }
+
+            Logger.Stub?.PrintStub(LogClass.ServiceNgct, new { text, textFiltered });
+
+            return ResultCode.Success;
+        }
+    }
+}
+\ No newline at end of file