system/btif/src/bluetooth.cc

/******************************************************************************
 *
 *  Copyright (C) 2009-2012 Broadcom Corporation
 *
 *  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.
 *
 ******************************************************************************/

/*******************************************************************************
 *
 *  Filename:      bluetooth.c
 *
 *  Description:   Bluetooth HAL implementation
 *
 ******************************************************************************/

#define LOG_TAG "bt_btif"

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <hardware/bluetooth.h>
#include <hardware/bt_av.h>
#include <hardware/bt_gatt.h>
#include <hardware/bt_hf.h>
#include <hardware/bt_hf_client.h>
#include <hardware/bt_hh.h>
#include <hardware/bt_hl.h>
#include <hardware/bt_mce.h>
#include <hardware/bt_pan.h>
#include <hardware/bt_rc.h>
#include <hardware/bt_sdp.h>
#include <hardware/bt_sock.h>

#include "bt_utils.h"
#include "btif/include/btif_debug_btsnoop.h"
#include "btif/include/btif_debug_conn.h"
#include "btif_a2dp.h"
#include "btif_api.h"
#include "btif_config.h"
#include "btif_debug.h"
#include "btif_storage.h"
#include "btsnoop.h"
#include "btsnoop_mem.h"
#include "device/include/interop.h"
#include "osi/include/alarm.h"
#include "osi/include/allocation_tracker.h"
#include "osi/include/log.h"
#include "osi/include/metrics.h"
#include "osi/include/osi.h"
#include "osi/include/wakelock.h"
#include "stack_manager.h"

/*******************************************************************************
 *  Static variables
 ******************************************************************************/

bt_callbacks_t* bt_hal_cbacks = NULL;
bool restricted_mode = false;

/*******************************************************************************
 *  Externs
 ******************************************************************************/

/* list all extended interfaces here */

/* handsfree profile */
extern bthf_interface_t* btif_hf_get_interface();
/* handsfree profile - client */
extern bthf_client_interface_t* btif_hf_client_get_interface();
/* advanced audio profile */
extern btav_interface_t* btif_av_get_src_interface();
extern btav_interface_t* btif_av_get_sink_interface();
/*rfc l2cap*/
extern btsock_interface_t* btif_sock_get_interface();
/* hid host profile */
extern bthh_interface_t* btif_hh_get_interface();
/* health device profile */
extern bthl_interface_t* btif_hl_get_interface();
/*pan*/
extern btpan_interface_t* btif_pan_get_interface();
/*map client*/
extern btmce_interface_t* btif_mce_get_interface();
/* gatt */
extern const btgatt_interface_t* btif_gatt_get_interface();
/* avrc target */
extern btrc_interface_t* btif_rc_get_interface();
/* avrc controller */
extern btrc_interface_t* btif_rc_ctrl_get_interface();
/*SDP search client*/
extern btsdp_interface_t* btif_sdp_get_interface();

/*******************************************************************************
 *  Functions
 ******************************************************************************/

static bool interface_ready(void) { return bt_hal_cbacks != NULL; }

static bool is_profile(const char* p1, const char* p2) {
  assert(p1);
  assert(p2);
  return strlen(p1) == strlen(p2) && strncmp(p1, p2, strlen(p2)) == 0;
}

/*****************************************************************************
 *
 *   BLUETOOTH HAL INTERFACE FUNCTIONS
 *
 ****************************************************************************/

static int init(bt_callbacks_t* callbacks) {
  LOG_INFO(LOG_TAG, "%s", __func__);

  if (interface_ready()) return BT_STATUS_DONE;

#ifdef BLUEDROID_DEBUG
  allocation_tracker_init();
#endif

  bt_hal_cbacks = callbacks;
  stack_manager_get_interface()->init_stack();
  btif_debug_init();
  return BT_STATUS_SUCCESS;
}

static int enable(bool start_restricted) {
  LOG_INFO(LOG_TAG, "%s: start restricted = %d", __func__, start_restricted);

  restricted_mode = start_restricted;

  if (!interface_ready()) return BT_STATUS_NOT_READY;

  stack_manager_get_interface()->start_up_stack_async();
  return BT_STATUS_SUCCESS;
}

static int disable(void) {
  if (!interface_ready()) return BT_STATUS_NOT_READY;

  stack_manager_get_interface()->shut_down_stack_async();
  return BT_STATUS_SUCCESS;
}

static void cleanup(void) { stack_manager_get_interface()->clean_up_stack(); }

bool is_restricted_mode() { return restricted_mode; }

static int get_adapter_properties(void) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_get_adapter_properties();
}

static int get_adapter_property(bt_property_type_t type) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_get_adapter_property(type);
}

static int set_adapter_property(const bt_property_t* property) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_set_adapter_property(property);
}

int get_remote_device_properties(bt_bdaddr_t* remote_addr) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_get_remote_device_properties(remote_addr);
}

int get_remote_device_property(bt_bdaddr_t* remote_addr,
                               bt_property_type_t type) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_get_remote_device_property(remote_addr, type);
}

int set_remote_device_property(bt_bdaddr_t* remote_addr,
                               const bt_property_t* property) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_set_remote_device_property(remote_addr, property);
}

int get_remote_service_record(bt_bdaddr_t* remote_addr, bt_uuid_t* uuid) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_get_remote_service_record(remote_addr, uuid);
}

int get_remote_services(bt_bdaddr_t* remote_addr) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_get_remote_services(remote_addr);
}

static int start_discovery(void) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_start_discovery();
}

static int cancel_discovery(void) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_cancel_discovery();
}

static int create_bond(const bt_bdaddr_t* bd_addr, int transport) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_create_bond(bd_addr, transport);
}

static int create_bond_out_of_band(const bt_bdaddr_t* bd_addr, int transport,
                                   const bt_out_of_band_data_t* oob_data) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_create_bond_out_of_band(bd_addr, transport, oob_data);
}

static int cancel_bond(const bt_bdaddr_t* bd_addr) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_cancel_bond(bd_addr);
}

static int remove_bond(const bt_bdaddr_t* bd_addr) {
  if (is_restricted_mode() && !btif_storage_is_restricted_device(bd_addr))
    return BT_STATUS_SUCCESS;

  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_remove_bond(bd_addr);
}

static int get_connection_state(const bt_bdaddr_t* bd_addr) {
  /* sanity check */
  if (interface_ready() == false) return 0;

  return btif_dm_get_connection_state(bd_addr);
}

static int pin_reply(const bt_bdaddr_t* bd_addr, uint8_t accept,
                     uint8_t pin_len, bt_pin_code_t* pin_code) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_pin_reply(bd_addr, accept, pin_len, pin_code);
}

static int ssp_reply(const bt_bdaddr_t* bd_addr, bt_ssp_variant_t variant,
                     uint8_t accept, uint32_t passkey) {
  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dm_ssp_reply(bd_addr, variant, accept, passkey);
}

static int read_energy_info() {
  if (interface_ready() == false) return BT_STATUS_NOT_READY;
  btif_dm_read_energy_info();
  return BT_STATUS_SUCCESS;
}

static void dump(int fd, const char** arguments) {
  if (arguments != NULL && arguments[0] != NULL) {
    if (strncmp(arguments[0], "--proto-bin", 11) == 0) {
      btif_update_a2dp_metrics();
      metrics_write(fd, true);
      return;
    }
  }
  btif_debug_conn_dump(fd);
  btif_debug_bond_event_dump(fd);
  btif_debug_a2dp_dump(fd);
  btif_debug_config_dump(fd);
  wakelock_debug_dump(fd);
  alarm_debug_dump(fd);
#if (BTSNOOP_MEM == TRUE)
  btif_debug_btsnoop_dump(fd);
#endif

  close(fd);
}

static const void* get_profile_interface(const char* profile_id) {
  LOG_INFO(LOG_TAG, "get_profile_interface %s", profile_id);

  /* sanity check */
  if (interface_ready() == false) return NULL;

  /* check for supported profile interfaces */
  if (is_profile(profile_id, BT_PROFILE_HANDSFREE_ID))
    return btif_hf_get_interface();

  if (is_profile(profile_id, BT_PROFILE_HANDSFREE_CLIENT_ID))
    return btif_hf_client_get_interface();

  if (is_profile(profile_id, BT_PROFILE_SOCKETS_ID))
    return btif_sock_get_interface();

  if (is_profile(profile_id, BT_PROFILE_PAN_ID))
    return btif_pan_get_interface();

  if (is_profile(profile_id, BT_PROFILE_ADVANCED_AUDIO_ID))
    return btif_av_get_src_interface();

  if (is_profile(profile_id, BT_PROFILE_ADVANCED_AUDIO_SINK_ID))
    return btif_av_get_sink_interface();

  if (is_profile(profile_id, BT_PROFILE_HIDHOST_ID))
    return btif_hh_get_interface();

  if (is_profile(profile_id, BT_PROFILE_HEALTH_ID))
    return btif_hl_get_interface();

  if (is_profile(profile_id, BT_PROFILE_SDP_CLIENT_ID))
    return btif_sdp_get_interface();

  if (is_profile(profile_id, BT_PROFILE_GATT_ID))
    return btif_gatt_get_interface();

  if (is_profile(profile_id, BT_PROFILE_AV_RC_ID))
    return btif_rc_get_interface();

  if (is_profile(profile_id, BT_PROFILE_AV_RC_CTRL_ID))
    return btif_rc_ctrl_get_interface();

  return NULL;
}

int dut_mode_configure(uint8_t enable) {
  LOG_INFO(LOG_TAG, "dut_mode_configure");

  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dut_mode_configure(enable);
}

int dut_mode_send(uint16_t opcode, uint8_t* buf, uint8_t len) {
  LOG_INFO(LOG_TAG, "dut_mode_send");

  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_dut_mode_send(opcode, buf, len);
}

int le_test_mode(uint16_t opcode, uint8_t* buf, uint8_t len) {
  LOG_INFO(LOG_TAG, "le_test_mode");

  /* sanity check */
  if (interface_ready() == false) return BT_STATUS_NOT_READY;

  return btif_le_test_mode(opcode, buf, len);
}

int config_hci_snoop_log(uint8_t enable) {
  LOG_INFO(LOG_TAG, "config_hci_snoop_log");

  if (!interface_ready()) return BT_STATUS_NOT_READY;

  btsnoop_get_interface()->set_api_wants_to_log(enable);
  return BT_STATUS_SUCCESS;
}

static int set_os_callouts(bt_os_callouts_t* callouts) {
  wakelock_set_os_callouts(callouts);
  return BT_STATUS_SUCCESS;
}

static int config_clear(void) {
  LOG_INFO(LOG_TAG, "%s", __func__);
  return btif_config_clear() ? BT_STATUS_SUCCESS : BT_STATUS_FAIL;
}

static const bt_interface_t bluetoothInterface = {
    sizeof(bluetoothInterface),
    init,
    enable,
    disable,
    cleanup,
    get_adapter_properties,
    get_adapter_property,
    set_adapter_property,
    get_remote_device_properties,
    get_remote_device_property,
    set_remote_device_property,
    get_remote_service_record,
    get_remote_services,
    start_discovery,
    cancel_discovery,
    create_bond,
    create_bond_out_of_band,
    remove_bond,
    cancel_bond,
    get_connection_state,
    pin_reply,
    ssp_reply,
    get_profile_interface,
    dut_mode_configure,
    dut_mode_send,
    le_test_mode,
    config_hci_snoop_log,
    set_os_callouts,
    read_energy_info,
    dump,
    config_clear,
    interop_database_clear,
    interop_database_add,
};

const bt_interface_t* bluetooth__get_bluetooth_interface() {
  /* fixme -- add property to disable bt interface ? */

  return &bluetoothInterface;
}

static int close_bluetooth_stack(UNUSED_ATTR struct hw_device_t* device) {
  cleanup();
  return 0;
}

static int open_bluetooth_stack(const struct hw_module_t* module,
                                UNUSED_ATTR char const* name,
                                struct hw_device_t** abstraction) {
  static bluetooth_device_t device;
  device.common.tag = HARDWARE_DEVICE_TAG;
  device.common.version = 0;
  device.common.close = close_bluetooth_stack;
  device.get_bluetooth_interface = bluetooth__get_bluetooth_interface;
  device.common.module = (struct hw_module_t*)module;
  *abstraction = (struct hw_device_t*)&device;
  return 0;
}

static struct hw_module_methods_t bt_stack_module_methods = {
    .open = open_bluetooth_stack,
};

EXPORT_SYMBOL struct hw_module_t HAL_MODULE_INFO_SYM = {
    .tag = HARDWARE_MODULE_TAG,
    .version_major = 1,
    .version_minor = 0,
    .id = BT_HARDWARE_MODULE_ID,
    .name = "Bluetooth Stack",
    .author = "The Android Open Source Project",
    .methods = &bt_stack_module_methods};