[core/hle] Adds sorting game titles and prevents hard crashes in qlaunch (#3330)

Adds correct sorting in qlaunch (tested with FW 19 and FW20-21)

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3330
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: Maufeat <sahyno1996@gmail.com>
Co-committed-by: Maufeat <sahyno1996@gmail.com>

src/core/hle/service/acc/acc.cpp

@@ -138,12 +138,13 @@ private:
         R_SUCCEED();
     }
 
-    Result GetNetworkServiceLicenseCacheEx() {
+    Result GetNetworkServiceLicenseCacheEx(Out<u32> out_license, Out<s64> out_expiration) {
         LOG_DEBUG(Service_ACC, "(STUBBED) called.");
 
-        // TODO (jarrodnorwell)
+        *out_license = 0;
+        *out_expiration = 0;
 
-        R_RETURN(ResultUnknown);
+        R_SUCCEED();
     }
 
     Common::UUID account_id;

src/core/hle/service/erpt/erpt.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -22,7 +25,7 @@ public:
             {2, nullptr, "SetInitialLaunchSettingsCompletionTime"},
             {3, nullptr, "ClearInitialLaunchSettingsCompletionTime"},
             {4, nullptr, "UpdatePowerOnTime"},
-            {5, nullptr, "UpdateAwakeTime"},
+            {5, D<&ErrorReportContext::UpdateAwakeTime>, "UpdateAwakeTime"},
             {6, nullptr, "SubmitMultipleCategoryContext"},
             {7, nullptr, "UpdateApplicationLaunchTime"},
             {8, nullptr, "ClearApplicationLaunchTime"},
@@ -74,6 +77,14 @@ private:
             report_type, unknown, create_report_option_flag);
         R_SUCCEED();
     }
+
+    Result UpdateAwakeTime(InBuffer<BufferAttr_HipcMapAlias> data_a,
+                           InBuffer<BufferAttr_HipcMapAlias> data_b, u32 flag_a, u32 flag_b) {
+        LOG_WARNING(Service_SET,
+                    "(STUBBED) called, data_a_size={}, data_b_size={}, flag_a={}, flag_b={}",
+                    data_a.size(), data_b.size(), flag_a, flag_b);
+        R_SUCCEED();
+    }
 };
 
 class ErrorReportSession final : public ServiceFramework<ErrorReportSession> {

src/core/hle/service/friend/friend.cpp

@@ -53,6 +53,7 @@ public:
             {20102, nullptr, "GetFriendDetailedInfo"},
             {20103, nullptr, "SyncFriendList"},
             {20104, &IFriendService::RequestSyncFriendList, "RequestSyncFriendList"},
+            {20105, &IFriendService::GetFriendListForViewer, "GetFriendListForViewer"},
             {20110, nullptr, "LoadFriendSetting"},
             {20200, &IFriendService::GetReceivedFriendRequestCount, "GetReceivedFriendRequestCount"},
             {20201, nullptr, "GetFriendRequestList"},
@@ -65,11 +66,13 @@ public:
             {20401, nullptr, "SyncBlockedUserList"},
             {20500, nullptr, "GetProfileExtraList"},
             {20501, nullptr, "GetRelationship"},
-            {20600, &IFriendService::GetUserPresenceView, "GetUserPresenceView"},
+            {20600, &IFriendService::GetUserPresenceView, "GetUserPresenceViewV1"},
+            {20601, &IFriendService::GetUserPresenceView, "GetUserPresenceViewV2"},
             {20700, nullptr, "GetPlayHistoryList"},
             {20701, &IFriendService::GetPlayHistoryStatistics, "GetPlayHistoryStatistics"},
-            {20800, &IFriendService::LoadUserSetting, "LoadUserSetting"},
+            {20800, &IFriendService::LoadUserSetting, "LoadUserSettingV1"},
             {20801, nullptr, "SyncUserSetting"},
+            {20802, &IFriendService::LoadUserSetting, "LoadUserSettingV2"},
             {20900, &IFriendService::RequestListSummaryOverlayNotification, "RequestListSummaryOverlayNotification"},
             {21000, nullptr, "GetExternalApplicationCatalog"},
             {22000, nullptr, "GetReceivedFriendInvitationList"},
@@ -270,6 +273,14 @@ private:
         rb.Push(ResultSuccess);
     }
 
+    void GetFriendListForViewer(HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Friend, "(STUBBED) called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(ResultSuccess);
+        rb.Push<u32>(0);
+    }
+
     void GetReceivedFriendRequestCount(HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         [[maybe_unused]] const auto uuid = rp.PopRaw<Common::UUID>();

src/core/hle/service/ns/application_manager_interface.cpp

@@ -136,7 +136,7 @@ IApplicationManagerInterface::IApplicationManagerInterface(Core::System& system_
         {404, nullptr, "InvalidateApplicationControlCache"},
         {405, nullptr, "ListApplicationControlCacheEntryInfo"},
         {406, nullptr, "GetApplicationControlProperty"},
-        {407, nullptr, "ListApplicationTitle"},
+        {407, &IApplicationManagerInterface::ListApplicationTitle, "ListApplicationTitle"},
         {408, nullptr, "ListApplicationIcon"},
         {411, nullptr, "Unknown411"}, //19.0.0+
         {412, nullptr, "Unknown412"}, //19.0.0+
@@ -832,4 +832,9 @@ Result IApplicationManagerInterface::Unknown4053() {
     R_SUCCEED();
 }
 
+void IApplicationManagerInterface::ListApplicationTitle(HLERequestContext& ctx) {
+    LOG_DEBUG(Service_NS, "called");
+    IReadOnlyApplicationControlDataInterface(system).ListApplicationTitle(ctx);
+}
+
 } // namespace Service::NS

src/core/hle/service/ns/application_manager_interface.h

@@ -71,6 +71,8 @@ public:
     Result RequestDownloadApplicationControlDataInBackground(u64 control_source,
                                                              u64 application_id);
 
+    void ListApplicationTitle(HLERequestContext& ctx);
+
 private:
     KernelHelpers::ServiceContext service_context;
     Event record_update_system_event;

src/core/hle/service/ns/content_management_interface.cpp

@@ -21,6 +21,7 @@ IContentManagementInterface::IContentManagementInterface(Core::System& system_)
         {43, D<&IContentManagementInterface::CheckSdCardMountStatus>, "CheckSdCardMountStatus"},
         {47, D<&IContentManagementInterface::GetTotalSpaceSize>, "GetTotalSpaceSize"},
         {48, D<&IContentManagementInterface::GetFreeSpaceSize>, "GetFreeSpaceSize"},
+        {71, D<&IContentManagementInterface::GetUnknown71>, "Unknown71"},
         {600, nullptr, "CountApplicationContentMeta"},
         {601, nullptr, "ListApplicationContentMetaStatus"},
         {605, nullptr, "ListApplicationContentMetaStatusWithRightsCheck"},
@@ -73,4 +74,12 @@ Result IContentManagementInterface::GetFreeSpaceSize(Out<s64> out_free_space_siz
     R_SUCCEED();
 }
 
+Result IContentManagementInterface::GetUnknown71(Out<u64> out_value_a, Out<u64> out_value_b,
+                                                 u8 flag) {
+    LOG_INFO(Service_NS, "(STUBBED) called, flag={:02X}", flag);
+    *out_value_a = 0;
+    *out_value_b = 0;
+    R_SUCCEED();
+}
+
 } // namespace Service::NS

src/core/hle/service/ns/content_management_interface.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -20,6 +23,7 @@ public:
     Result CheckSdCardMountStatus();
     Result GetTotalSpaceSize(Out<s64> out_total_space_size, FileSys::StorageId storage_id);
     Result GetFreeSpaceSize(Out<s64> out_free_space_size, FileSys::StorageId storage_id);
+    Result GetUnknown71(Out<u64> out_value_a, Out<u64> out_value_b, u8 flag);
 };
 
 } // namespace Service::NS

src/core/hle/service/ns/ns_types.h

@@ -47,9 +47,9 @@ struct ApplicationDownloadState {
     u64 total_size;
     u32 unk_x10;
     u8 state;
-    u8 unk_x19;
-    std::array<u8, 0x2> unk_x1a;
-    u64 unk_x20;
+    u8 unk_x15;
+    std::array<u8, 0x2> unk_x16;
+    u64 unk_x18;
 };
 static_assert(sizeof(ApplicationDownloadState) == 0x20,
               "ApplicationDownloadState has incorrect size.");

src/core/hle/service/ns/query_service.cpp

@@ -9,10 +9,13 @@
 #include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/ns/query_service.h"
 #include "core/hle/service/service.h"
+#include "core/launch_timestamp_cache.h"
+#include "frontend_common/play_time_manager.h"
 
 namespace Service::NS {
 
-IQueryService::IQueryService(Core::System& system_) : ServiceFramework{system_, "pdm:qry"} {
+IQueryService::IQueryService(Core::System& system_) : ServiceFramework{system_, "pdm:qry"},
+    play_time_manager{std::make_unique<PlayTime::PlayTimeManager>()} {
     // clang-format off
     static const FunctionInfo functions[] = {
         {0, nullptr, "QueryAppletEvent"},
@@ -33,8 +36,8 @@ IQueryService::IQueryService(Core::System& system_) : ServiceFramework{system_,
         {15, nullptr, "GetRecentlyPlayedApplicationUpdateEvent"},
         {16, nullptr, "QueryApplicationPlayStatisticsByUserAccountIdForSystemV0"},
         {17, D<&IQueryService::QueryLastPlayTime>, "QueryLastPlayTime"},
-        {18, nullptr, "QueryApplicationPlayStatisticsForSystem"},
-        {19, nullptr, "QueryApplicationPlayStatisticsByUserAccountIdForSystem"},
+        {18, D<&IQueryService::QueryApplicationPlayStatisticsForSystem>, "QueryApplicationPlayStatisticsForSystem"},
+        {19, D<&IQueryService::QueryApplicationPlayStatisticsByUserAccountIdForSystem>, "QueryApplicationPlayStatisticsByUserAccountIdForSystem"},
     };
     // clang-format on
 
@@ -65,4 +68,32 @@ Result IQueryService::QueryLastPlayTime(
     R_SUCCEED();
 }
 
+Result IQueryService::QueryApplicationPlayStatisticsForSystem(
+    Out<s32> out_entries, u8 flag,
+    OutArray<ApplicationPlayStatistics, BufferAttr_HipcMapAlias> out_stats,
+    InArray<u64, BufferAttr_HipcMapAlias> application_ids) {
+    const size_t count = std::min(out_stats.size(), application_ids.size());
+    s32 written = 0;
+    for (size_t i = 0; i < count; ++i) {
+        const u64 app_id = application_ids[i];
+        ApplicationPlayStatistics stats{};
+        stats.application_id = app_id;
+        stats.play_time_ns = play_time_manager->GetPlayTime(app_id) * 1'000'000'000ULL;
+        stats.launch_count = Core::LaunchTimestampCache::GetLaunchCount(app_id);
+        out_stats[i] = stats;
+        ++written;
+    }
+    *out_entries = written;
+    LOG_DEBUG(Service_NS, "called, entries={} flag={}", written, flag);
+    R_SUCCEED();
+}
+
+Result IQueryService::QueryApplicationPlayStatisticsByUserAccountIdForSystem(
+    Out<s32> out_entries, u8 flag, Common::UUID user_id,
+    OutArray<ApplicationPlayStatistics, BufferAttr_HipcMapAlias> out_stats,
+    InArray<u64, BufferAttr_HipcMapAlias> application_ids) {
+    // well we don't do per-user tracking :>
+    return QueryApplicationPlayStatisticsForSystem(out_entries, flag, out_stats, application_ids);
+}
+
 } // namespace Service::NS

src/core/hle/service/ns/query_service.h

@@ -7,10 +7,17 @@
 #pragma once
 
 #include "common/uuid.h"
+#include "core/hle/service/am/am_types.h"
 #include "core/hle/service/cmif_types.h"
 #include "core/hle/service/ns/ns_types.h"
 #include "core/hle/service/service.h"
 
+#include <memory>
+
+namespace PlayTime {
+class PlayTimeManager;
+}
+
 namespace Service::NS {
 
 struct PlayStatistics {
@@ -28,6 +35,13 @@ static_assert(sizeof(PlayStatistics) == 0x28, "PlayStatistics is an invalid size
 
 struct LastPlayTime {};
 
+struct ApplicationPlayStatistics {
+    u64 application_id{};
+    u64 play_time_ns{};
+    u64 launch_count{};
+};
+static_assert(sizeof(ApplicationPlayStatistics) == 0x18, "ApplicationPlayStatistics is an invalid size");
+
 class IQueryService final : public ServiceFramework<IQueryService> {
 public:
     explicit IQueryService(Core::System& system_);
@@ -39,6 +53,16 @@ private:
     Result QueryLastPlayTime(Out<s32> out_entries, u8 unknown,
                              OutArray<LastPlayTime, BufferAttr_HipcMapAlias> out_last_play_times,
                              InArray<s32, BufferAttr_HipcMapAlias> application_ids);
+    Result QueryApplicationPlayStatisticsForSystem(
+        Out<s32> out_entries, u8 flag,
+        OutArray<ApplicationPlayStatistics, BufferAttr_HipcMapAlias> out_stats,
+        InArray<u64, BufferAttr_HipcMapAlias> application_ids);
+    Result QueryApplicationPlayStatisticsByUserAccountIdForSystem(
+        Out<s32> out_entries, u8 flag, Common::UUID user_id,
+        OutArray<ApplicationPlayStatistics, BufferAttr_HipcMapAlias> out_stats,
+        InArray<u64, BufferAttr_HipcMapAlias> application_ids);
+
+    std::unique_ptr<PlayTime::PlayTimeManager> play_time_manager;
 };
 
 } // namespace Service::NS

src/core/hle/service/ns/read_only_application_control_data_interface.cpp

@@ -6,20 +6,24 @@
 
 #include <algorithm>
 #include <vector>
+#include <optional>
 #include <stb_image.h>
 #include <stb_image_resize.h>
 #include <stb_image_write.h>
+#include <string>
 
 #include "common/settings.h"
 #include "core/file_sys/control_metadata.h"
 #include "core/file_sys/patch_manager.h"
 #include "core/file_sys/vfs/vfs.h"
+#include "core/hle/kernel/k_transfer_memory.h"
 #include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/ns/language.h"
 #include "core/hle/service/ns/ns_types.h"
 #include "core/hle/service/ns/ns_results.h"
 #include "core/hle/service/ns/read_only_application_control_data_interface.h"
 #include "core/hle/service/set/settings_server.h"
+#include "core/hle/service/kernel_helpers.h"
 
 namespace Service::NS {
 
@@ -66,6 +70,70 @@ void SanitizeJPEGImageSize(std::vector<u8>& image) {
 
 } // namespace
 
+
+// IAsyncValue implementation for ListApplicationTitle
+// https://switchbrew.org/wiki/NS_services#ListApplicationTitle
+class IAsyncValueForListApplicationTitle final : public ServiceFramework<IAsyncValueForListApplicationTitle> {
+public:
+    explicit IAsyncValueForListApplicationTitle(Core::System& system_, s32 offset, s32 size)
+        : ServiceFramework{system_, "IAsyncValue"}, service_context{system_, "IAsyncValue"},
+          data_offset{offset}, data_size{size} {
+        static const FunctionInfo functions[] = {
+            {0, &IAsyncValueForListApplicationTitle::GetSize, "GetSize"},
+            {1, &IAsyncValueForListApplicationTitle::Get, "Get"},
+            {2, &IAsyncValueForListApplicationTitle::Cancel, "Cancel"},
+            {3, &IAsyncValueForListApplicationTitle::GetErrorContext, "GetErrorContext"},
+        };
+        RegisterHandlers(functions);
+
+        completion_event = service_context.CreateEvent("IAsyncValue:Completion");
+        completion_event->GetReadableEvent().Signal();
+    }
+
+    ~IAsyncValueForListApplicationTitle() override {
+        service_context.CloseEvent(completion_event);
+    }
+
+    Kernel::KReadableEvent& ReadableEvent() const {
+        return completion_event->GetReadableEvent();
+    }
+
+private:
+    void GetSize(HLERequestContext& ctx) {
+        LOG_DEBUG(Service_NS, "called");
+        IPC::ResponseBuilder rb{ctx, 4};
+        rb.Push(ResultSuccess);
+        rb.Push<s64>(data_size);
+    }
+
+    void Get(HLERequestContext& ctx) {
+        LOG_DEBUG(Service_NS, "called");
+        std::vector<u8> buffer(sizeof(s32));
+        std::memcpy(buffer.data(), &data_offset, sizeof(s32));
+        ctx.WriteBuffer(buffer);
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+    }
+
+    void Cancel(HLERequestContext& ctx) {
+        LOG_DEBUG(Service_NS, "called");
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+    }
+
+    void GetErrorContext(HLERequestContext& ctx) {
+        LOG_DEBUG(Service_NS, "called");
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+    }
+
+    KernelHelpers::ServiceContext service_context;
+    Kernel::KEvent* completion_event{};
+    s32 data_offset;
+    s32 data_size;
+};
+
 IReadOnlyApplicationControlDataInterface::IReadOnlyApplicationControlDataInterface(
     Core::System& system_)
     : ServiceFramework{system_, "IReadOnlyApplicationControlDataInterface"} {
@@ -76,8 +144,9 @@ IReadOnlyApplicationControlDataInterface::IReadOnlyApplicationControlDataInterfa
         {2, D<&IReadOnlyApplicationControlDataInterface::ConvertApplicationLanguageToLanguageCode>, "ConvertApplicationLanguageToLanguageCode"},
         {3, nullptr, "ConvertLanguageCodeToApplicationLanguage"},
         {4, nullptr, "SelectApplicationDesiredLanguage"},
-        {5, D<&IReadOnlyApplicationControlDataInterface::GetApplicationControlData2>, "GetApplicationControlDataWithoutIcon"},
-        {19, D<&IReadOnlyApplicationControlDataInterface::GetApplicationControlData3>, "GetApplicationControlDataWithoutIcon3"},
+        {5, D<&IReadOnlyApplicationControlDataInterface::GetApplicationControlData2>, "GetApplicationControlData"},
+        {13, &IReadOnlyApplicationControlDataInterface::ListApplicationTitle, "ListApplicationTitle"},
+        {19, D<&IReadOnlyApplicationControlDataInterface::GetApplicationControlData3>, "GetApplicationControlData"},
     };
     // clang-format on
 
@@ -240,6 +309,60 @@ Result IReadOnlyApplicationControlDataInterface::GetApplicationControlData2(
     R_SUCCEED();
 }
 
+
+void IReadOnlyApplicationControlDataInterface::ListApplicationTitle(HLERequestContext& ctx) {
+    /*
+    IPC::RequestParser rp{ctx};
+    auto control_source = rp.PopRaw<u8>();
+    rp.Skip(7, false);
+    auto transfer_memory_size = rp.Pop<u64>();
+    */
+
+    const auto app_ids_buffer = ctx.ReadBuffer();
+    const size_t app_count = app_ids_buffer.size() / sizeof(u64);
+
+    std::vector<u64> application_ids(app_count);
+    if (app_count > 0) {
+        std::memcpy(application_ids.data(), app_ids_buffer.data(), app_count * sizeof(u64));
+    }
+
+    auto t_mem_obj = ctx.GetObjectFromHandle<Kernel::KTransferMemory>(ctx.GetCopyHandle(0));
+    auto* t_mem = t_mem_obj.GetPointerUnsafe();
+
+    constexpr size_t title_entry_size = sizeof(FileSys::LanguageEntry);
+    const size_t total_data_size = app_count * title_entry_size;
+
+    constexpr s32 data_offset = 0;
+
+    if (t_mem != nullptr && app_count > 0) {
+        auto& memory = system.ApplicationMemory();
+        const auto t_mem_address = t_mem->GetSourceAddress();
+
+        for (size_t i = 0; i < app_count; ++i) {
+            const u64 app_id = application_ids[i];
+            const FileSys::PatchManager pm{app_id, system.GetFileSystemController(),
+                                           system.GetContentProvider()};
+            const auto control = pm.GetControlMetadata();
+
+            FileSys::LanguageEntry entry{};
+            if (control.first != nullptr) {
+                entry = control.first->GetLanguageEntry();
+            }
+
+            const size_t offset = i * title_entry_size;
+            memory.WriteBlock(t_mem_address + offset, &entry, title_entry_size);
+        }
+    }
+
+    auto async_value = std::make_shared<IAsyncValueForListApplicationTitle>(
+        system, data_offset, static_cast<s32>(total_data_size));
+
+    IPC::ResponseBuilder rb{ctx, 2, 1, 1};
+    rb.Push(ResultSuccess);
+    rb.PushCopyObjects(async_value->ReadableEvent());
+    rb.PushIpcInterface(std::move(async_value));
+}
+
 Result IReadOnlyApplicationControlDataInterface::GetApplicationControlData3(
    OutBuffer<BufferAttr_HipcMapAlias> out_buffer, Out<u32> out_flags_a, Out<u32> out_flags_b,
    Out<u32> out_actual_size, ApplicationControlSource application_control_source, u8 flag1, u8 flag2, u64 application_id) {

src/core/hle/service/ns/read_only_application_control_data_interface.h

@@ -34,6 +34,7 @@ public:
         u8 flag1,
         u8 flag2,
         u64 application_id);
+    void ListApplicationTitle(HLERequestContext& ctx);
     Result GetApplicationControlData3(
         OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
         Out<u32> out_flags_a,

src/core/hle/service/olsc/daemon_controller.cpp

@@ -92,13 +92,10 @@ Result IDaemonController::SetGlobalAutoDownloadSetting(bool is_enabled, Common::
     R_SUCCEED();
 }
 
-Result IDaemonController::GetAutonomyTaskStatus(Out<u8> out_state, Common::UUID user_id,
-                                                u64 application_id) {
-    LOG_INFO(Service_OLSC, "called, user_id={} application_id={:016X}", user_id.FormattedString(),
-             application_id);
-    AppKey key{user_id, application_id};
-    const auto it = autonomy_task_status_.find(key);
-    *out_state = (it != autonomy_task_status_.end()) ? it->second : 0; // default idle
+Result IDaemonController::GetAutonomyTaskStatus(Out<u8> out_status, Common::UUID user_id) {
+    LOG_INFO(Service_OLSC, "called, user_id={}", user_id.FormattedString());
+
+    *out_status = 0;
     R_SUCCEED();
 }
 

src/core/hle/service/olsc/daemon_controller.h

@@ -32,7 +32,7 @@ private:
     Result GetGlobalAutoDownloadSetting(Out<bool> out_is_enabled, Common::UUID user_id);
     Result SetGlobalAutoDownloadSetting(bool is_enabled, Common::UUID user_id);
 
-    Result GetAutonomyTaskStatus(Out<u8> out_state, Common::UUID user_id, u64 application_id);
+    Result GetAutonomyTaskStatus(Out<u8> out_status, Common::UUID user_id);
 
     // Internal in-memory state to back the above APIs
     struct AppKey {

src/core/hle/service/sockets/nsd.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -34,7 +37,7 @@ NSD::NSD(Core::System& system_, const char* name) : ServiceFramework{system_, na
         {12, nullptr, "GetDeviceId"},
         {13, nullptr, "DeleteSettings"},
         {14, nullptr, "ImportSettings"},
-        {15, nullptr, "SetChangeEnvironmentIdentifierDisabled"},
+        {15, &NSD::SetChangeEnvironmentIdentifierDisabled, "SetChangeEnvironmentIdentifierDisabled"},
         {20, &NSD::Resolve, "Resolve"},
         {21, &NSD::ResolveEx, "ResolveEx"},
         {30, nullptr, "GetNasServiceSetting"},
@@ -77,6 +80,16 @@ static Result ResolveCommon(const std::string& fqdn_in, std::array<char, 0x100>&
     return ResultSuccess;
 }
 
+void NSD::SetChangeEnvironmentIdentifierDisabled(HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const bool disabled = rp.Pop<bool>();
+
+    LOG_WARNING(Service, "(STUBBED) called, disabled={}", disabled);
+
+    IPC::ResponseBuilder rb{ctx, 1};
+    rb.Push(ResultSuccess);
+}
+
 void NSD::Resolve(HLERequestContext& ctx) {
     const std::string fqdn_in = Common::StringFromBuffer(ctx.ReadBuffer(0));
 

src/core/hle/service/sockets/nsd.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -17,6 +20,7 @@ public:
     ~NSD() override;
 
 private:
+    void SetChangeEnvironmentIdentifierDisabled(HLERequestContext& ctx);
     void Resolve(HLERequestContext& ctx);
     void ResolveEx(HLERequestContext& ctx);
     void GetEnvironmentIdentifier(HLERequestContext& ctx);