Add Android information service to send API level (26b76ebc) · Commits · e / os / android_packages_modules_Bluetooth

system/btif/src/stack_manager.cc

+2 −0

Original line number	Diff line number	Diff line
		@@ -63,6 +63,7 @@
		#include "internal_include/stack_config.h"
		#include "rust/src/core/ffi/module.h"
		#include "stack/btm/btm_ble_int.h"
		#include "stack/include/ais_api.h"
		#include "stack/include/smp_api.h"

		#ifndef BT_STACK_CLEANUP_WAIT_MS
		@@ -301,6 +302,7 @@ static void event_start_up_stack(bluetooth::core::CoreInterface* interface,

		RFCOMM_Init();
		GAP_Init();
		AIS_Init();

		startProfiles();

system/stack/Android.bp

+5 −0

Original line number	Diff line number	Diff line
		@@ -38,6 +38,7 @@ cc_library_static {
		name: "libbt-stack",
		defaults: ["fluoride_defaults"],
		local_include_dirs: [
		"ais",
		"avct",
		"avdt",
		"avrc",
		@@ -180,6 +181,7 @@ cc_library_static {
		name: "libbt-stack-core",
		defaults: ["fluoride_defaults"],
		local_include_dirs: [
		"ais",
		"avct",
		"avdt",
		"avrc",
		@@ -213,6 +215,7 @@ cc_library_static {
		"acl/ble_acl.cc",
		"acl/btm_acl.cc",
		"acl/btm_pm.cc",
		"ais/ais_ble.cc",
		"arbiter/acl_arbiter.cc",
		"btm/ble_scanner_hci_interface.cc",
		"btm/btm_ble.cc",
		@@ -517,6 +520,7 @@ cc_fuzz {
		":TestMockStackL2cap",
		":TestMockStackMetrics",
		":TestMockStackSdp",
		"ais/*.cc",
		"eatt/*.cc",
		"fuzzers/gatt_fuzzer.cc",
		"gatt/*.cc",
		@@ -1973,6 +1977,7 @@ cc_test {
		":TestMockStackL2cap",
		":TestMockStackSdp",
		":TestMockStackSmp",
		"ais/ais_ble.cc",
		"arbiter/acl_arbiter.cc",
		"eatt/eatt.cc",
		"gatt/att_protocol.cc",

system/stack/BUILD.gn

+2 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,7 @@ source_set("nonstandard_codecs") {

		source_set("stack") {
		sources = [
		"ais/ais_ble.cc",
		"a2dp/a2dp_api.cc",
		"a2dp/a2dp_codec_config.cc",
		"a2dp/a2dp_ext.cc",
		@@ -187,6 +188,7 @@ source_set("stack") {
		include_dirs = [
		".",
		"include",
		"ais",
		"avct",
		"btm",
		"avrc",

system/stack/ais/ais_ble.cc

0 → 100644

+144 −0

Original line number	Diff line number	Diff line
		/******************************************************************************
		*
		* Copyright 2024 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at:
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*
		******************************************************************************/

		#include <bluetooth/log.h>
		#include <com_android_bluetooth_flags.h>
		#include <string.h>

		#include <array>

		#include "os/system_properties.h"
		#include "stack/include/ais_api.h"
		#include "stack/include/bt_types.h"
		#include "stack/include/gatt_api.h"
		#include "types/bluetooth/uuid.h"

		using bluetooth::Uuid;
		using bluetooth::log::error;
		using bluetooth::log::warn;

		static const char kPropertyAndroidAPILevel[] = "ro.build.version.sdk";
		static const uint32_t kPropertyAndroidAPILevelDefault = 0;

		const Uuid ANDROID_INFORMATION_SERVICE_UUID =
		Uuid::FromString(ANDROID_INFORMATION_SERVICE_UUID_STRING);
		const Uuid GATT_UUID_AIS_API_LEVEL = Uuid::FromString(GATT_UUID_AIS_API_LEVEL_STRING);

		/* LE AIS attribute handle */
		static uint16_t attr_api_level_handle;

		static uint32_t api_level;

		void ais_request_cback(uint16_t, uint32_t, tGATTS_REQ_TYPE, tGATTS_DATA*);

		static tGATT_CBACK ais_cback = {
		.p_conn_cb = nullptr,
		.p_cmpl_cb = nullptr,
		.p_disc_res_cb = nullptr,
		.p_disc_cmpl_cb = nullptr,
		.p_req_cb = ais_request_cback,
		.p_enc_cmpl_cb = nullptr,
		.p_congestion_cb = nullptr,
		.p_phy_update_cb = nullptr,
		.p_conn_update_cb = nullptr,
		.p_subrate_chg_cb = nullptr,
		};

		/** AIS ATT server attribute access request callback */
		void ais_request_cback(uint16_t conn_id, uint32_t trans_id, tGATTS_REQ_TYPE type,
		tGATTS_DATA* p_data) {
		tGATT_STATUS status = GATT_INVALID_PDU;
		tGATTS_RSP rsp_msg = {};
		uint16_t handle = p_data->read_req.handle;
		tGATT_VALUE* p_value = &rsp_msg.attr_value;
		uint8_t* p = p_value->value;

		if (type == GATTS_REQ_TYPE_READ_CHARACTERISTIC) {
		p_value->handle = handle;

		if (handle == attr_api_level_handle) {
		if (p_data->read_req.is_long) {
		p_value->offset = p_data->read_req.offset;
		status = GATT_NOT_LONG;
		} else {
		UINT32_TO_STREAM(p, api_level);
		p_value->len = 4;
		status = GATT_SUCCESS;
		}
		} else {
		status = GATT_NOT_FOUND;
		}
		} else {
		warn("Unknown/unexpected LE AIS ATT request: 0x{:02x}", type);
		}

		if (GATTS_SendRsp(conn_id, trans_id, status, &rsp_msg) != GATT_SUCCESS) {
		warn("Unable to send GATT server response conn_id:{}", conn_id);
		}
		}

		/*******************************************************************************
		*
		* Function ais_attr_db_init
		*
		* Description AIS ATT database initialization.
		*
		* Returns void.
		*
		******************************************************************************/
		void ais_attr_db_init(void) {
		if (!com::android::bluetooth::flags::android_os_identifier()) {
		return;
		}
		api_level = bluetooth::os::GetSystemPropertyUint32(kPropertyAndroidAPILevel,
		kPropertyAndroidAPILevelDefault);
		// Add Android OS identifier if API level is defined.
		if (api_level != kPropertyAndroidAPILevelDefault) {
		std::array<uint8_t, Uuid::kNumBytes128> tmp;
		tmp.fill(0xc5); // any number is fine here
		Uuid app_uuid = Uuid::From128BitBE(tmp);

		tGATT_IF gatt_if = GATT_Register(app_uuid, "Ais", &ais_cback, false);

		GATT_StartIf(gatt_if);

		btgatt_db_element_t android_information_service[] = {
		{
		.uuid = ANDROID_INFORMATION_SERVICE_UUID,
		.type = BTGATT_DB_PRIMARY_SERVICE,
		},
		{
		.uuid = GATT_UUID_AIS_API_LEVEL,
		.type = BTGATT_DB_CHARACTERISTIC,
		.properties = GATT_CHAR_PROP_BIT_READ,
		.permissions = GATT_PERM_READ_IF_ENCRYPTED_OR_DISCOVERABLE,
		}};
		if (GATTS_AddService(gatt_if, android_information_service,
		sizeof(android_information_service) / sizeof(btgatt_db_element_t)) !=
		GATT_SERVICE_STARTED) {
		error("Unable to add Android Information Server gatt_if:{}", gatt_if);
		}

		attr_api_level_handle = android_information_service[1].attribute_handle;
		}
		}

		/*
		* This routine should not be called except once per stack invocation.
		*/
		void AIS_Init(void) { ais_attr_db_init(); }

system/stack/fuzzers/gatt_fuzzer.cc

+3 −0

Original line number	Diff line number	Diff line
		@@ -49,6 +49,9 @@ namespace os {
		bool GetSystemPropertyBool(const std::string& property, bool default_value) {
		return default_value;
		}
		uint32_t GetSystemPropertyUint32(const std::string& property, uint32_t default_value) {
		return default_value;
		}
		} // namespace os
		} // namespace bluetooth