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/******************************************************************************
*
* Copyright 2014 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_btif_sock"
#include <base/logging.h>
#include <frameworks/proto_logging/stats/enums/bluetooth/enums.pb.h>
#include <hardware/bluetooth.h>
#include <hardware/bt_sock.h>
#include <atomic>
#include "bta_api.h"
#include "btif_common.h"
#include "btif_config.h"
#include "btif_metrics_logging.h"
#include "btif_sock_l2cap.h"
#include "btif_sock_rfc.h"
#include "btif_sock_sco.h"
#include "btif_sock_sdp.h"
#include "btif_sock_thread.h"
#include "btif_uid.h"
#include "btif_util.h"
#include "osi/include/thread.h"
#include "types/bluetooth/uuid.h"
#include "types/raw_address.h"
extern bool btif_get_address_type(const RawAddress& bda,
tBLE_ADDR_TYPE* p_addr_type);
extern bool btif_get_device_type(const RawAddress& bda, int* p_device_type);
using bluetooth::Uuid;
static bt_status_t btsock_listen(btsock_type_t type, const char* service_name,
const Uuid* uuid, int channel, int* sock_fd,
int flags, int app_uid);
static bt_status_t btsock_connect(const RawAddress* bd_addr, btsock_type_t type,
const Uuid* uuid, int channel, int* sock_fd,
int flags, int app_uid);
static void btsock_request_max_tx_data_length(const RawAddress& bd_addr);
static void btsock_signaled(int fd, int type, int flags, uint32_t user_id);
static std::atomic_int thread_handle{-1};
static thread_t* thread;
const btsock_interface_t* btif_sock_get_interface(void) {
static btsock_interface_t interface = {
sizeof(interface), btsock_listen, /* listen */
btsock_connect, /* connect */
btsock_request_max_tx_data_length /* request_max_tx_data_length */
};
return &interface;
}
bt_status_t btif_sock_init(uid_set_t* uid_set) {
CHECK(thread_handle == -1);
CHECK(thread == NULL);
bt_status_t status;
btsock_thread_init();
thread_handle = btsock_thread_create(btsock_signaled, NULL);
if (thread_handle == -1) {
LOG_ERROR("%s unable to create btsock_thread.", __func__);
goto error;
}
status = btsock_rfc_init(thread_handle, uid_set);
if (status != BT_STATUS_SUCCESS) {
LOG_ERROR("%s error initializing RFCOMM sockets: %d", __func__, status);
goto error;
}
status = btsock_l2cap_init(thread_handle, uid_set);
if (status != BT_STATUS_SUCCESS) {
LOG_ERROR("%s error initializing L2CAP sockets: %d", __func__, status);
goto error;
}
thread = thread_new("btif_sock");
if (!thread) {
LOG_ERROR("%s error creating new thread.", __func__);
btsock_rfc_cleanup();
goto error;
}
status = btsock_sco_init(thread);
if (status != BT_STATUS_SUCCESS) {
LOG_ERROR("%s error initializing SCO sockets: %d", __func__, status);
btsock_rfc_cleanup();
goto error;
}
return BT_STATUS_SUCCESS;
error:;
thread_free(thread);
thread = NULL;
if (thread_handle != -1) btsock_thread_exit(thread_handle);
thread_handle = -1;
uid_set = NULL;
return BT_STATUS_FAIL;
}
void btif_sock_cleanup(void) {
int saved_handle = thread_handle;
if (std::atomic_exchange(&thread_handle, -1) == -1) return;
btsock_thread_exit(saved_handle);
btsock_rfc_cleanup();
btsock_sco_cleanup();
btsock_l2cap_cleanup();
thread_free(thread);
thread = NULL;
}
static bt_status_t btsock_listen(btsock_type_t type, const char* service_name,
const Uuid* service_uuid, int channel,
int* sock_fd, int flags, int app_uid) {
if ((flags & BTSOCK_FLAG_NO_SDP) == 0) {
CHECK(sock_fd != NULL);
}
*sock_fd = INVALID_FD;
bt_status_t status = BT_STATUS_FAIL;
int original_channel = channel;
log_socket_connection_state(RawAddress::kEmpty, 0, type,
android::bluetooth::SocketConnectionstateEnum::
SOCKET_CONNECTION_STATE_LISTENING,
0, 0, app_uid, channel,
android::bluetooth::SOCKET_ROLE_LISTEN);
switch (type) {
case BTSOCK_RFCOMM:
status = btsock_rfc_listen(service_name, service_uuid, channel, sock_fd,
flags, app_uid);
break;
case BTSOCK_L2CAP:
status =
btsock_l2cap_listen(service_name, channel, sock_fd, flags, app_uid);
break;
case BTSOCK_L2CAP_LE:
if (flags & BTSOCK_FLAG_NO_SDP) {
/* Set channel to zero so that it will be assigned */
channel = 0;
} else if (channel <= 0) {
LOG_ERROR("%s: type BTSOCK_L2CAP_LE: invalid channel=%d", __func__,
channel);
break;
}
flags |= BTSOCK_FLAG_LE_COC;
LOG_INFO(
"%s: type=BTSOCK_L2CAP_LE, channel=0x%x, original=0x%x, flags=0x%x",
__func__, channel, original_channel, flags);
status =
btsock_l2cap_listen(service_name, channel, sock_fd, flags, app_uid);
break;
case BTSOCK_SCO:
status = btsock_sco_listen(sock_fd, flags);
break;
default:
LOG_ERROR("%s unknown/unsupported socket type: %d", __func__, type);
status = BT_STATUS_UNSUPPORTED;
break;
}
if (status != BT_STATUS_SUCCESS) {
log_socket_connection_state(RawAddress::kEmpty, 0, type,
android::bluetooth::SocketConnectionstateEnum::
SOCKET_CONNECTION_STATE_DISCONNECTED,
0, 0, app_uid, channel,
android::bluetooth::SOCKET_ROLE_LISTEN);
}
return status;
}
static bt_status_t btsock_connect(const RawAddress* bd_addr, btsock_type_t type,
const Uuid* uuid, int channel, int* sock_fd,
int flags, int app_uid) {
CHECK(bd_addr != NULL);
CHECK(sock_fd != NULL);
*sock_fd = INVALID_FD;
bt_status_t status = BT_STATUS_FAIL;
log_socket_connection_state(*bd_addr, 0, type,
android::bluetooth::SocketConnectionstateEnum::
SOCKET_CONNECTION_STATE_CONNECTING,
0, 0, app_uid, channel,
android::bluetooth::SOCKET_ROLE_CONNECTION);
switch (type) {
case BTSOCK_RFCOMM:
status =
btsock_rfc_connect(bd_addr, uuid, channel, sock_fd, flags, app_uid);
break;
case BTSOCK_L2CAP:
status = btsock_l2cap_connect(bd_addr, channel, sock_fd, flags, app_uid);
break;
case BTSOCK_L2CAP_LE: {
flags |= BTSOCK_FLAG_LE_COC;
// Ensure device is in inquiry database
tBLE_ADDR_TYPE addr_type = BLE_ADDR_PUBLIC;
int device_type = 0;
if (btif_get_address_type(*bd_addr, &addr_type) &&
btif_get_device_type(*bd_addr, &device_type) &&
device_type != BT_DEVICE_TYPE_BREDR) {
BTA_DmAddBleDevice(*bd_addr, addr_type, device_type);
}
LOG_INFO("%s: type=BTSOCK_L2CAP_LE, channel=0x%x, flags=0x%x", __func__,
channel, flags);
status = btsock_l2cap_connect(bd_addr, channel, sock_fd, flags, app_uid);
break;
}
case BTSOCK_SCO:
status = btsock_sco_connect(bd_addr, sock_fd, flags);
break;
default:
LOG_ERROR("%s unknown/unsupported socket type: %d", __func__, type);
status = BT_STATUS_UNSUPPORTED;
break;
}
if (status != BT_STATUS_SUCCESS) {
log_socket_connection_state(*bd_addr, 0, type,
android::bluetooth::SocketConnectionstateEnum::
SOCKET_CONNECTION_STATE_DISCONNECTED,
0, 0, app_uid, channel,
android::bluetooth::SOCKET_ROLE_CONNECTION);
}
return status;
}
static void btsock_request_max_tx_data_length(const RawAddress& remote_device) {
BTA_DmBleRequestMaxTxDataLength(remote_device);
}
static void btsock_signaled(int fd, int type, int flags, uint32_t user_id) {
switch (type) {
case BTSOCK_RFCOMM:
btsock_rfc_signaled(fd, flags, user_id);
break;
case BTSOCK_L2CAP:
case BTSOCK_L2CAP_LE:
/* Note: The caller may not distinguish between BTSOCK_L2CAP and
* BTSOCK_L2CAP_LE correctly */
btsock_l2cap_signaled(fd, flags, user_id);
break;
default:
LOG(FATAL) << "Invalid socket type! type=" << type << " fd=" << fd
<< " flags=" << flags << " user_id=" << user_id;
break;
}
}
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