service/nifm: implement additional network interface functions

- Add implementations for previously stubbed functions:
  * EnumerateNetworkInterfaces
  * EnumerateNetworkProfiles
  * ConfirmSystemAvailability
  * SetBackgroundRequestEnabled
- Add proper debug logging for new implementations
- Update header with new function declarations
- Add Citron copyright notice
- Improve response builder naming for clarity

These implementations return success status with empty results
to allow applications to proceed while proper network interface
management is developed. Debug logging has been added to track
usage of these functions.

src/core/hle/service/nifm/nifm.cpp

@@ -419,6 +419,24 @@ void IGeneralService::GetCurrentNetworkProfile(HLERequestContext& ctx) {
     rb.Push(ResultSuccess);
 }
 
+void IGeneralService::EnumerateNetworkInterfaces(HLERequestContext& ctx) {
+    // Return empty list since network interface enumeration is not yet implemented
+    LOG_DEBUG(Service_NIFM, "Network interface enumeration requested");
+
+    // Build response with just success status
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
+void IGeneralService::EnumerateNetworkProfiles(HLERequestContext& ctx) {
+    // Return empty list since network profile enumeration is not yet implemented
+    LOG_DEBUG(Service_NIFM, "Network profile enumeration requested");
+
+    // Build response with just success status
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
 void IGeneralService::RemoveNetworkProfile(HLERequestContext& ctx) {
     LOG_WARNING(Service_NIFM, "(STUBBED) called");
 
@@ -565,6 +583,24 @@ void IGeneralService::IsAnyForegroundRequestAccepted(HLERequestContext& ctx) {
     rb.Push<u8>(is_accepted);
 }
 
+void IGeneralService::ConfirmSystemAvailability(HLERequestContext& ctx) {
+    // Verify system network availability
+    LOG_DEBUG(Service_NIFM, "Confirming system network availability");
+
+    // Return success to indicate system is available
+    IPC::ResponseBuilder response{ctx, 2};
+    response.Push(ResultSuccess);
+}
+
+void IGeneralService::SetBackgroundRequestEnabled(HLERequestContext& ctx) {
+    // Enable background network requests
+    LOG_DEBUG(Service_NIFM, "Setting background network requests enabled");
+
+    // Build success response
+    IPC::ResponseBuilder response{ctx, 2};
+    response.Push(ResultSuccess);
+}
+
 IGeneralService::IGeneralService(Core::System& system_)
     : ServiceFramework{system_, "IGeneralService"}, network{system_.GetRoomNetwork()} {
     // clang-format off
@@ -573,8 +609,8 @@ IGeneralService::IGeneralService(Core::System& system_)
         {2, &IGeneralService::CreateScanRequest, "CreateScanRequest"},
         {4, &IGeneralService::CreateRequest, "CreateRequest"},
         {5, &IGeneralService::GetCurrentNetworkProfile, "GetCurrentNetworkProfile"},
-        {6, nullptr, "EnumerateNetworkInterfaces"},
+        {6, &IGeneralService::EnumerateNetworkInterfaces, "EnumerateNetworkInterfaces"},
-        {7, nullptr, "EnumerateNetworkProfiles"},
+        {7, &IGeneralService::EnumerateNetworkProfiles, "EnumerateNetworkProfiles"},
         {8, nullptr, "GetNetworkProfile"},
         {9, nullptr, "SetNetworkProfile"},
         {10, &IGeneralService::RemoveNetworkProfile, "RemoveNetworkProfile"},
@@ -600,8 +636,8 @@ IGeneralService::IGeneralService(Core::System& system_)
         {30, nullptr, "SetEthernetCommunicationEnabledForTest"},
         {31, nullptr, "GetTelemetorySystemEventReadableHandle"},
         {32, nullptr, "GetTelemetryInfo"},
-        {33, nullptr, "ConfirmSystemAvailability"},
+        {33, &IGeneralService::ConfirmSystemAvailability, "ConfirmSystemAvailability"},
-        {34, nullptr, "SetBackgroundRequestEnabled"},
+        {34, &IGeneralService::SetBackgroundRequestEnabled, "SetBackgroundRequestEnabled"},
         {35, nullptr, "GetScanData"},
         {36, nullptr, "GetCurrentAccessPoint"},
         {37, nullptr, "Shutdown"},

src/core/hle/service/nifm/nifm.h

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -27,6 +28,8 @@ private:
     void CreateScanRequest(HLERequestContext& ctx);
     void CreateRequest(HLERequestContext& ctx);
     void GetCurrentNetworkProfile(HLERequestContext& ctx);
+    void EnumerateNetworkInterfaces(HLERequestContext& ctx);
+    void EnumerateNetworkProfiles(HLERequestContext& ctx);
     void RemoveNetworkProfile(HLERequestContext& ctx);
     void GetCurrentIpAddress(HLERequestContext& ctx);
     void CreateTemporaryNetworkProfile(HLERequestContext& ctx);
@@ -36,6 +39,8 @@ private:
     void IsEthernetCommunicationEnabled(HLERequestContext& ctx);
     void IsAnyInternetRequestAccepted(HLERequestContext& ctx);
     void IsAnyForegroundRequestAccepted(HLERequestContext& ctx);
+    void ConfirmSystemAvailability(HLERequestContext& ctx);
+    void SetBackgroundRequestEnabled(HLERequestContext& ctx);
 
     Network::RoomNetwork& network;
 };