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Add system setting to mirror bluetooth pairing database to sd card (#1787)
* ams_mitm: add ability to mirror bluetooth device pairing database to sd card via a system setting * ams_mitm: address requested stylistic changes * ams_mitm: make use of R_SUCCEED macro * ams_mitm: use settings::BluetoothDevicesSettings instead of libnx type * ams_mitm: fix logic error when truncating pairing database on read * Update .ini comment * ams_mitm: missing R_TRY around call to fs::FlushFile * stratosphere: remove union from BluetoothDevicesSettings type --------- Co-authored-by: ndeadly <24677491+ndeadly@users.noreply.github.com>
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ndeadly
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@ -67,6 +67,10 @@
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; Note that this setting is ignored (and treated as 1) when htc is enabled.
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; 0 = Disabled, 1 = Enabled
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; enable_log_manager = u8!0x0
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; Controls whether the bluetooth pairing database is redirected to the SD card (shared across sysmmc/all emummcs)
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; NOTE: On <13.0.0, the database size was 10 instead of 20; booting pre-13.0.0 will truncate the database.
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; 0 = Disabled, 1 = Enabled
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; enable_external_bluetooth_db = u8!0x0
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[hbloader]
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; Controls the size of the homebrew heap when running as applet.
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; If set to zero, all available applet memory is used as heap.
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@ -235,4 +235,29 @@ namespace ams::settings {
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return !(lhs <= rhs);
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}
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struct BluetoothDevicesSettings : public sf::LargeData {
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u8 address[0x6];
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char name[0x20];
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u8 class_of_device[0x3];
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u8 link_key[0x10];
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u8 link_key_present;
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u16 version;
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u32 trusted_services;
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u16 vid;
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u16 pid;
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u8 sub_class;
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u8 attribute_mask;
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u16 descriptor_length;
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u8 descriptor[0x80];
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u8 key_type;
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u8 device_type;
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u16 brr_size;
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u8 brr[0x9];
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u8 reserved0;
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char name2[0xF9];
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u8 reserved1[0x31];
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};
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static_assert(sizeof(BluetoothDevicesSettings) == sizeof(::SetSysBluetoothDevicesSettings));
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}
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@ -16,6 +16,7 @@
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#include <stratosphere.hpp>
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#include "setsys_mitm_service.hpp"
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#include "settings_sd_kvs.hpp"
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#include "setsys_shim.h"
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namespace ams::mitm::settings {
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@ -23,6 +24,8 @@ namespace ams::mitm::settings {
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namespace {
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constexpr const char ExternalBluetoothDatabasePath[] = "@Sdcard:/atmosphere/bluetooth_devices.db";
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constinit os::SdkMutex g_firmware_version_lock;
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constinit bool g_cached_firmware_version;
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constinit settings::FirmwareVersion g_firmware_version;
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@ -87,6 +90,97 @@ namespace ams::mitm::settings {
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R_SUCCEED();
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}
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bool ExternalBluetoothDatabaseEnabled() {
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u8 en = 0;
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settings::fwdbg::GetSettingsItemValue(std::addressof(en), sizeof(en), "atmosphere", "enable_external_bluetooth_db");
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return en;
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}
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bool HasExternalBluetoothDatabase() {
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bool file_exists;
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R_ABORT_UNLESS(fs::HasFile(std::addressof(file_exists), ExternalBluetoothDatabasePath));
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return file_exists;
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}
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Result ReadExternalBluetoothDatabase(s32 *entries_read, settings::BluetoothDevicesSettings *db, size_t db_max_size) {
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/* Open external database file. */
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fs::FileHandle file;
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R_TRY(fs::OpenFile(std::addressof(file), ExternalBluetoothDatabasePath, fs::OpenMode_Read));
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ON_SCOPE_EXIT { fs::CloseFile(file); };
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/* Read number of database entries stored in external database. */
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size_t total_entries;
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R_TRY(fs::ReadFile(file, 0, std::addressof(total_entries), sizeof(total_entries)));
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u64 db_offset = sizeof(total_entries);
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if (total_entries > db_max_size) {
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/* Pairings are stored from least to most recent. Add offset to skip the older entries that won't fit. */
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db_offset += (total_entries - db_max_size) * sizeof(settings::BluetoothDevicesSettings);
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/* Cap number of database entries read to size of database on this firmware. */
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total_entries = db_max_size;
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}
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/* Read database entries. */
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R_TRY(fs::ReadFile(file, db_offset, db, total_entries * sizeof(settings::BluetoothDevicesSettings)));
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/* Convert to old database format if running on a firmware below 13.0.0. */
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if (hos::GetVersion() < hos::Version_13_0_0) {
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for (size_t i = 0; i < total_entries; ++i) {
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/* Copy as many chars from currently used name field as we can fit in the original one. */
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util::SNPrintf(db[i].name, sizeof(db[i].name), "%s", db[i].name2);
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/* Clear the current name field. */
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std::memset(db[i].name2, 0, sizeof(db[i].name2));
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}
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}
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*entries_read = total_entries;
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R_SUCCEED();
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}
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Result StoreExternalBluetoothDatabase(const settings::BluetoothDevicesSettings *db, size_t total_entries) {
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/* Open external database file. */
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fs::FileHandle file;
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R_TRY(fs::OpenFile(std::addressof(file), ExternalBluetoothDatabasePath, fs::OpenMode_Write));
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ON_SCOPE_EXIT { fs::CloseFile(file); };
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/* Set file size to accomodate all database entries */
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R_TRY(fs::SetFileSize(file, sizeof(total_entries) + total_entries * sizeof(settings::BluetoothDevicesSettings)));
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/* Write number of database entries. */
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R_TRY(fs::WriteFile(file, 0, std::addressof(total_entries), sizeof(total_entries), fs::WriteOption::None));
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/* Write database entries. */
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u64 db_offset = sizeof(total_entries);
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if (hos::GetVersion() < hos::Version_13_0_0) {
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/* Convert to new database format if running on a firmware below 13.0.0 */
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settings::BluetoothDevicesSettings tmp_entry;
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for (size_t i = 0; i < total_entries; ++i) {
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/* Take a copy of the current database entry. */
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std::memcpy(std::addressof(tmp_entry), std::addressof(db[i]), sizeof(settings::BluetoothDevicesSettings));
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/* Copy the name field from the original location to the currently used one. */
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util::SNPrintf(tmp_entry.name2, sizeof(tmp_entry.name2), "%s", db[i].name);
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/* Clear the original name field. */
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std::memset(std::addressof(tmp_entry.name), 0, sizeof(tmp_entry.name));
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/* Write the converted database entry. */
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R_TRY(fs::WriteFile(file, db_offset, &tmp_entry, sizeof(settings::BluetoothDevicesSettings), fs::WriteOption::None));
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/* Increment offset to the next database entry. */
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db_offset += sizeof(settings::BluetoothDevicesSettings);
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}
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R_TRY(fs::FlushFile(file));
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} else {
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R_TRY(fs::WriteFile(file, db_offset, db, total_entries * sizeof(settings::BluetoothDevicesSettings), fs::WriteOption::Flush));
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}
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R_SUCCEED();
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}
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}
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Result SetSysMitmService::GetFirmwareVersion(sf::Out<settings::FirmwareVersion> out) {
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@ -102,6 +196,47 @@ namespace ams::mitm::settings {
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R_RETURN(GetFirmwareVersionImpl(out.GetPointer(), m_client_info));
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}
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Result SetSysMitmService::SetBluetoothDevicesSettings(const sf::InMapAliasArray<settings::BluetoothDevicesSettings> &settings) {
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/* Forward to session unless external database setting enabled. */
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R_UNLESS(ExternalBluetoothDatabaseEnabled(), sm::mitm::ResultShouldForwardToSession());
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/* Create the external database if it doesn't exist. */
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if (!HasExternalBluetoothDatabase()) {
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R_TRY(fs::CreateFile(ExternalBluetoothDatabasePath, 0));
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}
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/* Backup local database to sd card. */
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R_TRY(StoreExternalBluetoothDatabase(settings.GetPointer(), settings.GetSize()));
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/* Also allow the updated database to be stored to system save as usual. */
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static_assert(sizeof(settings::BluetoothDevicesSettings) == sizeof(::SetSysBluetoothDevicesSettings));
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R_TRY(setsysSetBluetoothDevicesSettingsFwd(m_forward_service.get(), reinterpret_cast<const ::SetSysBluetoothDevicesSettings *>(settings.GetPointer()), settings.GetSize()));
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R_SUCCEED();
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}
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Result SetSysMitmService::GetBluetoothDevicesSettings(sf::Out<s32> out_count, const sf::OutMapAliasArray<settings::BluetoothDevicesSettings> &out) {
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/* Forward to session unless external database setting enabled. */
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R_UNLESS(ExternalBluetoothDatabaseEnabled(), sm::mitm::ResultShouldForwardToSession());
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if (!HasExternalBluetoothDatabase()) {
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/* Forward to the real command to fetch database stored in system save. */
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static_assert(sizeof(settings::BluetoothDevicesSettings) == sizeof(::SetSysBluetoothDevicesSettings));
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R_TRY(setsysGetBluetoothDevicesSettingsFwd(m_forward_service.get(), out_count.GetPointer(), reinterpret_cast<::SetSysBluetoothDevicesSettings *>(out.GetPointer()), out.GetSize()));
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/* Create the external database file. */
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R_TRY(fs::CreateFile(ExternalBluetoothDatabasePath, 0));
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/* Backup local database to sd card. */
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R_TRY(StoreExternalBluetoothDatabase(out.GetPointer(), out_count.GetValue()));
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} else {
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/* Read the external database from sd card. */
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R_TRY(ReadExternalBluetoothDatabase(out_count.GetPointer(), out.GetPointer(), out.GetSize()));
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}
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R_SUCCEED();
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}
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Result SetSysMitmService::GetSettingsItemValueSize(sf::Out<u64> out_size, const settings::SettingsName &name, const settings::SettingsItemKey &key) {
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R_TRY_CATCH(settings::fwdbg::GetSdCardKeyValueStoreSettingsItemValueSize(out_size.GetPointer(), name.value, key.value)) {
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R_CATCH_RETHROW(sf::impl::ResultRequestContextChanged)
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@ -19,6 +19,8 @@
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#define AMS_SETTINGS_SYSTEM_MITM_INTERFACE_INFO(C, H) \
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AMS_SF_METHOD_INFO(C, H, 3, Result, GetFirmwareVersion, (sf::Out<ams::settings::FirmwareVersion> out), (out)) \
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AMS_SF_METHOD_INFO(C, H, 4, Result, GetFirmwareVersion2, (sf::Out<ams::settings::FirmwareVersion> out), (out)) \
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AMS_SF_METHOD_INFO(C, H, 11, Result, SetBluetoothDevicesSettings, (const sf::InMapAliasArray<ams::settings::BluetoothDevicesSettings> &settings), (settings)) \
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AMS_SF_METHOD_INFO(C, H, 12, Result, GetBluetoothDevicesSettings, (sf::Out<s32> out_count, const sf::OutMapAliasArray<ams::settings::BluetoothDevicesSettings> &out), (out_count, out)) \
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AMS_SF_METHOD_INFO(C, H, 37, Result, GetSettingsItemValueSize, (sf::Out<u64> out_size, const ams::settings::SettingsName &name, const ams::settings::SettingsItemKey &key), (out_size, name, key)) \
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AMS_SF_METHOD_INFO(C, H, 38, Result, GetSettingsItemValue, (sf::Out<u64> out_size, const sf::OutBuffer &out, const ams::settings::SettingsName &name, const ams::settings::SettingsItemKey &key), (out_size, out, name, key)) \
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AMS_SF_METHOD_INFO(C, H, 62, Result, GetDebugModeFlag, (sf::Out<bool> out), (out))
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@ -41,6 +43,8 @@ namespace ams::mitm::settings {
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public:
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Result GetFirmwareVersion(sf::Out<ams::settings::FirmwareVersion> out);
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Result GetFirmwareVersion2(sf::Out<ams::settings::FirmwareVersion> out);
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Result SetBluetoothDevicesSettings(const sf::InMapAliasArray<ams::settings::BluetoothDevicesSettings> &settings);
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Result GetBluetoothDevicesSettings(sf::Out<s32> out_count, const sf::OutMapAliasArray<ams::settings::BluetoothDevicesSettings> &out);
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Result GetSettingsItemValueSize(sf::Out<u64> out_size, const ams::settings::SettingsName &name, const ams::settings::SettingsItemKey &key);
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Result GetSettingsItemValue(sf::Out<u64> out_size, const sf::OutBuffer &out, const ams::settings::SettingsName &name, const ams::settings::SettingsItemKey &key);
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Result GetDebugModeFlag(sf::Out<bool> out);
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30
stratosphere/ams_mitm/source/set_mitm/setsys_shim.c
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30
stratosphere/ams_mitm/source/set_mitm/setsys_shim.c
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@ -0,0 +1,30 @@
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/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "setsys_shim.h"
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Result setsysSetBluetoothDevicesSettingsFwd(Service *s, const SetSysBluetoothDevicesSettings *settings, s32 count) {
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return serviceDispatch(s, 11,
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.buffer_attrs = { SfBufferAttr_HipcMapAlias | SfBufferAttr_In },
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.buffers = { { settings, count * sizeof(SetSysBluetoothDevicesSettings) } },
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);
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}
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Result setsysGetBluetoothDevicesSettingsFwd(Service *s, s32 *total_out, SetSysBluetoothDevicesSettings *settings, s32 count) {
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return serviceDispatchOut(s, 12, *total_out,
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.buffer_attrs = { SfBufferAttr_HipcMapAlias | SfBufferAttr_Out },
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.buffers = { { settings, count * sizeof(SetSysBluetoothDevicesSettings) } },
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);
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}
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20
stratosphere/ams_mitm/source/set_mitm/setsys_shim.h
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20
stratosphere/ams_mitm/source/set_mitm/setsys_shim.h
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@ -0,0 +1,20 @@
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/**
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* @file setsys_shim.h
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* @brief Settings Services (fs) IPC wrapper for setsys.mitm.
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* @author ndeadly
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* @copyright libnx Authors
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*/
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#pragma once
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#include <switch.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Forwarding shims. */
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Result setsysSetBluetoothDevicesSettingsFwd(Service *s, const SetSysBluetoothDevicesSettings *settings, s32 count);
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Result setsysGetBluetoothDevicesSettingsFwd(Service *s, s32 *total_out, SetSysBluetoothDevicesSettings *settings, s32 count);
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#ifdef __cplusplus
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}
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#endif
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@ -393,6 +393,11 @@ namespace ams::settings::fwdbg {
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/* 0 = Disabled, 1 = Enabled */
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R_ABORT_UNLESS(ParseSettingsItemValue("atmosphere", "enable_log_manager", "u8!0x0"));
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/* Controls whether the bluetooth pairing database is redirected to the SD card (shared across sysmmc/all emummcs) */
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/* NOTE: On <13.0.0, the database size was 10 instead of 20; booting pre-13.0.0 will truncate the database. */
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/* 0 = Disabled, 1 = Enabled */
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R_ABORT_UNLESS(ParseSettingsItemValue("atmosphere", "enable_external_bluetooth_db", "u8!0x0"));
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/* Hbloader custom settings. */
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/* Controls the size of the homebrew heap when running as applet. */
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