Move Android specific HCI code into separate file (732e2169) · Commits · e / os / android_packages_modules_Bluetooth

system/hci/Android.bp

+1 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@ cc_library_static {
		"src/hci_audio.cc",
		"src/hci_inject.cc",
		"src/hci_layer.cc",
		"src/hci_layer_android.cc",
		"src/hci_packet_factory.cc",
		"src/hci_packet_parser.cc",
		"src/packet_fragmenter.cc",

system/hci/src/hci_layer.cc

+23 −88

Original line number	Diff line number	Diff line
		@@ -20,17 +20,11 @@

		#include "hci_layer.h"

		#include <android/hardware/bluetooth/1.0/IBluetoothHci.h>
		#include <android/hardware/bluetooth/1.0/IBluetoothHciCallbacks.h>
		#include <android/hardware/bluetooth/1.0/types.h>
		#include <base/logging.h>
		#include <hwbinder/ProcessState.h>

		#include <signal.h>
		#include <string.h>
		#include <sys/types.h>
		#include <unistd.h>

		#include <mutex>

		#include "btcore/include/module.h"
		@@ -49,17 +43,9 @@

		#define BT_HCI_TIMEOUT_TAG_NUM 1010000

		using android::hardware::bluetooth::V1_0::IBluetoothHci;
		using android::hardware::bluetooth::V1_0::IBluetoothHciCallbacks;
		using android::hardware::bluetooth::V1_0::HciPacket;
		using android::hardware::bluetooth::V1_0::Status;
		using android::hardware::ProcessState;

		android::sp<IBluetoothHci> btHci;

		using ::android::hardware::Return;
		using ::android::hardware::Void;
		using ::android::hardware::hidl_vec;
		extern void hci_initialize();
		extern void hci_transmit(BT_HDR* packet);
		extern void hci_close();

		typedef struct {
		uint16_t opcode;
		@@ -123,52 +109,28 @@ static void fragmenter_transmit_finished(BT_HDR* packet,
		static const packet_fragmenter_callbacks_t packet_fragmenter_callbacks = {
		transmit_fragment, dispatch_reassembled, fragmenter_transmit_finished};

		class BluetoothHciCallbacks : public IBluetoothHciCallbacks {
		BT_HDR* WrapPacketAndCopy(uint16_t event, const hidl_vec<uint8_t>& data) {
		size_t packet_size = data.size() + BT_HDR_SIZE;
		BT_HDR* packet =
		reinterpret_cast<BT_HDR*>(buffer_allocator->alloc(packet_size));
		packet->offset = 0;
		packet->len = data.size();
		packet->layer_specific = 0;
		packet->event = event;
		// TODO(eisenbach): Avoid copy here; if BT_HDR->data can be ensured to
		// be the only way the data is accessed, a pointer could be passed here...
		memcpy(packet->data, data.data(), data.size());
		return packet;
		}

		Return<void> initializationComplete(Status status) {
		CHECK(status == Status::SUCCESS);
		void initialization_complete() {
		thread_post(thread, event_finish_startup, NULL);
		return Void();
		}

		Return<void> hciEventReceived(const hidl_vec<uint8_t>& event) {
		BT_HDR* packet = WrapPacketAndCopy(MSG_HC_TO_STACK_HCI_EVT, event);
		void hci_event_received(BT_HDR* packet) {
		btsnoop->capture(packet, true);

		if (!filter_incoming_event(packet)) {
		data_dispatcher_dispatch(interface.event_dispatcher, event[0], packet);
		data_dispatcher_dispatch(interface.event_dispatcher, packet->data[0],
		packet);
		}

		return Void();
		}

		Return<void> aclDataReceived(const hidl_vec<uint8_t>& data) {
		BT_HDR* packet = WrapPacketAndCopy(MSG_HC_TO_STACK_HCI_ACL, data);
		void acl_event_received(BT_HDR* packet) {
		btsnoop->capture(packet, true);
		packet_fragmenter->reassemble_and_dispatch(packet);
		return Void();
		}

		Return<void> scoDataReceived(const hidl_vec<uint8_t>& data) {
		BT_HDR* packet = WrapPacketAndCopy(MSG_HC_TO_STACK_HCI_SCO, data);
		void sco_data_received(BT_HDR* packet) {
		btsnoop->capture(packet, true);
		packet_fragmenter->reassemble_and_dispatch(packet);
		return Void();
		}
		};

		// Module lifecycle functions

		@@ -244,17 +206,7 @@ static future_t* hci_module_start_up(void) {
		fixed_queue_register_dequeue(packet_queue, thread_get_reactor(thread),
		event_packet_ready, NULL);

		btHci = IBluetoothHci::getService();
		// If android.hardware.bluetooth* is not found, Bluetooth can not continue.
		CHECK(btHci != nullptr);
		LOG_INFO(LOG_TAG, "%s: IBluetoothHci::getService() returned %p (%s)",
		__func__, btHci.get(), (btHci->isRemote() ? "remote" : "local"));

		// Block allows allocation of a variable that might be bypassed by goto.
		{
		android::sp<IBluetoothHciCallbacks> callbacks = new BluetoothHciCallbacks();
		btHci->initialize(callbacks);
		}
		hci_initialize();

		LOG_DEBUG(LOG_TAG, "%s starting async portion", __func__);
		return local_startup_future;
		@@ -287,8 +239,7 @@ static future_t* hci_module_shut_down() {
		alarm_free(startup_timer);
		startup_timer = NULL;

		btHci->close();
		btHci = nullptr;
		hci_close();

		thread_free(thread);
		thread = NULL;
		@@ -410,25 +361,9 @@ static void event_packet_ready(fixed_queue_t* queue,
		static void transmit_fragment(BT_HDR* packet, bool send_transmit_finished) {
		btsnoop->capture(packet, false);

		HciPacket data;
		data.setToExternal(packet->data + packet->offset, packet->len);
		hci_transmit(packet);

		uint16_t event = packet->event & MSG_EVT_MASK;
		switch (event & MSG_EVT_MASK) {
		case MSG_STACK_TO_HC_HCI_CMD:
		btHci->sendHciCommand(data);
		break;
		case MSG_STACK_TO_HC_HCI_ACL:
		btHci->sendAclData(data);
		break;
		case MSG_STACK_TO_HC_HCI_SCO:
		btHci->sendScoData(data);
		break;
		default:
		LOG_ERROR(LOG_TAG, "Unknown packet type (%d)", event);
		break;
		}

		if (event != MSG_STACK_TO_HC_HCI_CMD && send_transmit_finished)
		buffer_allocator->free(packet);
		}

system/hci/src/hci_layer_android.cc

0 → 100644

+133 −0

Original line number	Diff line number	Diff line
		/******************************************************************************
		*
		* Copyright (C) 2017 Google, Inc.
		*
		* 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.
		*
		******************************************************************************/

		#define LOG_TAG "bt_hci"

		#include "hci_layer.h"

		#include <base/logging.h>
		#include "buffer_allocator.h"
		#include "osi/include/log.h"

		#include <android/hardware/bluetooth/1.0/IBluetoothHci.h>
		#include <android/hardware/bluetooth/1.0/IBluetoothHciCallbacks.h>
		#include <android/hardware/bluetooth/1.0/types.h>
		#include <hwbinder/ProcessState.h>

		using android::hardware::bluetooth::V1_0::IBluetoothHci;
		using android::hardware::bluetooth::V1_0::IBluetoothHciCallbacks;
		using android::hardware::bluetooth::V1_0::HciPacket;
		using android::hardware::bluetooth::V1_0::Status;
		using android::hardware::ProcessState;
		using ::android::hardware::Return;
		using ::android::hardware::Void;
		using ::android::hardware::hidl_vec;

		extern void initialization_complete();
		extern void hci_event_received(BT_HDR* packet);
		extern void acl_event_received(BT_HDR* packet);
		extern void sco_data_received(BT_HDR* packet);

		android::sp<IBluetoothHci> btHci;

		class BluetoothHciCallbacks : public IBluetoothHciCallbacks {
		public:
		BluetoothHciCallbacks() {
		buffer_allocator = buffer_allocator_get_interface();
		}

		BT_HDR* WrapPacketAndCopy(uint16_t event, const hidl_vec<uint8_t>& data) {
		size_t packet_size = data.size() + BT_HDR_SIZE;
		BT_HDR* packet =
		reinterpret_cast<BT_HDR*>(buffer_allocator->alloc(packet_size));
		packet->offset = 0;
		packet->len = data.size();
		packet->layer_specific = 0;
		packet->event = event;
		// TODO(eisenbach): Avoid copy here; if BT_HDR->data can be ensured to
		// be the only way the data is accessed, a pointer could be passed here...
		memcpy(packet->data, data.data(), data.size());
		return packet;
		}

		Return<void> initializationComplete(Status status) {
		CHECK(status == Status::SUCCESS);
		initialization_complete();
		return Void();
		}

		Return<void> hciEventReceived(const hidl_vec<uint8_t>& event) {
		BT_HDR* packet = WrapPacketAndCopy(MSG_HC_TO_STACK_HCI_EVT, event);
		hci_event_received(packet);
		return Void();
		}

		Return<void> aclDataReceived(const hidl_vec<uint8_t>& data) {
		BT_HDR* packet = WrapPacketAndCopy(MSG_HC_TO_STACK_HCI_ACL, data);
		acl_event_received(packet);
		return Void();
		}

		Return<void> scoDataReceived(const hidl_vec<uint8_t>& data) {
		BT_HDR* packet = WrapPacketAndCopy(MSG_HC_TO_STACK_HCI_SCO, data);
		sco_data_received(packet);
		return Void();
		}

		const allocator_t* buffer_allocator;
		};

		void hci_initialize() {
		btHci = IBluetoothHci::getService();
		// If android.hardware.bluetooth* is not found, Bluetooth can not continue.
		CHECK(btHci != nullptr);
		LOG_INFO(LOG_TAG, "%s: IBluetoothHci::getService() returned %p (%s)",
		__func__, btHci.get(), (btHci->isRemote() ? "remote" : "local"));

		// Block allows allocation of a variable that might be bypassed by goto.
		{
		android::sp<IBluetoothHciCallbacks> callbacks = new BluetoothHciCallbacks();
		btHci->initialize(callbacks);
		}
		}

		void hci_close() {
		btHci->close();
		btHci = nullptr;
		}

		void hci_transmit(BT_HDR* packet) {
		HciPacket data;
		data.setToExternal(packet->data + packet->offset, packet->len);

		uint16_t event = packet->event & MSG_EVT_MASK;
		switch (event & MSG_EVT_MASK) {
		case MSG_STACK_TO_HC_HCI_CMD:
		btHci->sendHciCommand(data);
		break;
		case MSG_STACK_TO_HC_HCI_ACL:
		btHci->sendAclData(data);
		break;
		case MSG_STACK_TO_HC_HCI_SCO:
		btHci->sendScoData(data);
		break;
		default:
		LOG_ERROR(LOG_TAG, "Unknown packet type (%d)", event);
		break;
		}
		}
		No newline at end of file