system/btif/src/btif_sock.cc - platform/packages/modules/Bluetooth - Git at Google

 /******************************************************************************
  *
  *  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 "btif/include/btif_sock.h"

 #include <base/functional/callback.h>
 #include <base/logging.h>
 #include <frameworks/proto_logging/stats/enums/bluetooth/enums.pb.h>
 #include <hardware/bluetooth.h>
 #include <hardware/bt_sock.h>
 #include <time.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"

 bool btif_get_address_type(const RawAddress& bda, tBLE_ADDR_TYPE* p_addr_type);
 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 bt_status_t btsock_control_req(uint8_t dlci, const RawAddress& bd_addr,
                                       uint8_t modem_signal,
                                       uint8_t break_signal,
                                       uint8_t discard_buffers,
                                       uint8_t break_signal_seq, bool fc);

 static void btsock_signaled(int fd, int type, int flags, uint32_t user_id);
 static bt_status_t btsock_disconnect_all(const RawAddress* bd_addr);

 static std::atomic_int thread_handle{-1};
 static thread_t* thread;

 #define SOCK_LOGGER_SIZE_MAX 16

 struct SockConnectionEvent {
   bool used;
   RawAddress addr;
   int state;
   int role;
   struct timespec timestamp;

   void dump(const int fd);
 };

 static std::atomic<uint8_t> logger_index;

 static SockConnectionEvent connection_logger[SOCK_LOGGER_SIZE_MAX];

 const btsock_interface_t* btif_sock_get_interface(void) {
   static btsock_interface_t interface = {
       sizeof(interface),  btsock_listen,
       btsock_connect,     btsock_request_max_tx_data_length,
       btsock_control_req, btsock_disconnect_all,
   };

   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;
 }

 void btif_sock_connection_logger(int state, int role, const RawAddress& addr) {
   LOG_INFO("address=%s, state=%d, role=%d", ADDRESS_TO_LOGGABLE_CSTR(addr),
            state, role);

   uint8_t index = logger_index++ % SOCK_LOGGER_SIZE_MAX;

   connection_logger[index] = {
       .used = true,
       .addr = addr,
       .state = state,
       .role = role,
   };
   clock_gettime(CLOCK_REALTIME, &connection_logger[index].timestamp);
 }

 void btif_sock_dump(int fd) {
   dprintf(fd, "\nSocket Events: \n");
   dprintf(fd, "  Time        \tAddress          \tState             \tRole\n");

   const uint8_t head = logger_index.load() % SOCK_LOGGER_SIZE_MAX;

   uint8_t index = head;
   do {
     connection_logger[index].dump(fd);

     index++;
     index %= SOCK_LOGGER_SIZE_MAX;
   } while (index != head);
   dprintf(fd, "\n");
 }

 void SockConnectionEvent::dump(const int fd) {
   if (!used) {
     return;
   }

   char eventtime[20];
   char temptime[20];
   struct tm* tstamp = localtime(&timestamp.tv_sec);
   strftime(temptime, sizeof(temptime), "%H:%M:%S", tstamp);
   snprintf(eventtime, sizeof(eventtime), "%s.%03ld", temptime,
            timestamp.tv_nsec / 1000000);

   const char* str_state;
   switch (state) {
     case SOCKET_CONNECTION_STATE_LISTENING:
       str_state = "STATE_LISTENING";
       break;
     case SOCKET_CONNECTION_STATE_CONNECTING:
       str_state = "STATE_CONNECTING";
       break;
     case SOCKET_CONNECTION_STATE_CONNECTED:
       str_state = "STATE_CONNECTED";
       break;
     case SOCKET_CONNECTION_STATE_DISCONNECTING:
       str_state = "STATE_DISCONNECTING";
       break;
     case SOCKET_CONNECTION_STATE_DISCONNECTED:
       str_state = "STATE_DISCONNECTED";
       break;
     default:
       str_state = "STATE_UNKNOWN";
       break;
   }

   const char* str_role;
   switch (role) {
     case SOCKET_ROLE_LISTEN:
       str_role = "ROLE_LISTEN";
       break;
     case SOCKET_ROLE_CONNECTION:
       str_role = "ROLE_CONNECTION";
       break;
     default:
       str_role = "ROLE_UNKNOWN";
       break;
   }

   dprintf(fd, "  %s\t%s\t%s   \t%s\n", eventtime,
           ADDRESS_TO_LOGGABLE_CSTR(addr), str_state, str_role);
 }

 static bt_status_t btsock_control_req(uint8_t dlci, const RawAddress& bd_addr,
                                       uint8_t modem_signal,
                                       uint8_t break_signal,
                                       uint8_t discard_buffers,
                                       uint8_t break_signal_seq, bool fc) {
   return btsock_rfc_control_req(dlci, bd_addr, modem_signal, break_signal,
                                 discard_buffers, break_signal_seq, fc);
 }

 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;

   btif_sock_connection_logger(SOCKET_CONNECTION_STATE_LISTENING,
                               SOCKET_ROLE_LISTEN, RawAddress::kEmpty);
   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) {
     btif_sock_connection_logger(SOCKET_CONNECTION_STATE_DISCONNECTED,
                                 SOCKET_ROLE_LISTEN, RawAddress::kEmpty);
     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);

   LOG_INFO("%s", __func__);

   *sock_fd = INVALID_FD;
   bt_status_t status = BT_STATUS_FAIL;

   btif_sock_connection_logger(SOCKET_CONNECTION_STATE_CONNECTING,
                               SOCKET_ROLE_CONNECTION, *bd_addr);
   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) {
     btif_sock_connection_logger(SOCKET_CONNECTION_STATE_DISCONNECTED,
                                 SOCKET_ROLE_CONNECTION, *bd_addr);
     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;
   }
 }

 static bt_status_t btsock_disconnect_all(const RawAddress* bd_addr) {
   CHECK(bd_addr != NULL);

   bt_status_t rfc_status = btsock_rfc_disconnect(bd_addr);
   bt_status_t l2cap_status = btsock_l2cap_disconnect(bd_addr);
   /* SCO is disconnected via btif_hf, so is not handled here. */

   LOG_INFO("%s: rfc status: %d, l2cap status: %d", __func__, rfc_status,
            l2cap_status);

   /* Return error status, if any. */
   if (rfc_status == BT_STATUS_SUCCESS) {
     return l2cap_status;
   }
   return rfc_status;
 }
	/******************************************************************************
	*
	* 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 "btif/include/btif_sock.h"

	#include <base/functional/callback.h>
	#include <base/logging.h>
	#include <frameworks/proto_logging/stats/enums/bluetooth/enums.pb.h>
	#include <hardware/bluetooth.h>
	#include <hardware/bt_sock.h>
	#include <time.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"

	bool btif_get_address_type(const RawAddress& bda, tBLE_ADDR_TYPE* p_addr_type);
	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 bt_status_t btsock_control_req(uint8_t dlci, const RawAddress& bd_addr,
	uint8_t modem_signal,
	uint8_t break_signal,
	uint8_t discard_buffers,
	uint8_t break_signal_seq, bool fc);

	static void btsock_signaled(int fd, int type, int flags, uint32_t user_id);
	static bt_status_t btsock_disconnect_all(const RawAddress* bd_addr);

	static std::atomic_int thread_handle{-1};
	static thread_t* thread;

	#define SOCK_LOGGER_SIZE_MAX 16

	struct SockConnectionEvent {
	bool used;
	RawAddress addr;
	int state;
	int role;
	struct timespec timestamp;

	void dump(const int fd);
	};

	static std::atomic<uint8_t> logger_index;

	static SockConnectionEvent connection_logger[SOCK_LOGGER_SIZE_MAX];

	const btsock_interface_t* btif_sock_get_interface(void) {
	static btsock_interface_t interface = {
	sizeof(interface), btsock_listen,
	btsock_connect, btsock_request_max_tx_data_length,
	btsock_control_req, btsock_disconnect_all,
	};

	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;
	}

	void btif_sock_connection_logger(int state, int role, const RawAddress& addr) {
	LOG_INFO("address=%s, state=%d, role=%d", ADDRESS_TO_LOGGABLE_CSTR(addr),
	state, role);

	uint8_t index = logger_index++ % SOCK_LOGGER_SIZE_MAX;

	connection_logger[index] = {
	.used = true,
	.addr = addr,
	.state = state,
	.role = role,
	};
	clock_gettime(CLOCK_REALTIME, &connection_logger[index].timestamp);
	}

	void btif_sock_dump(int fd) {
	dprintf(fd, "\nSocket Events: \n");
	dprintf(fd, " Time \tAddress \tState \tRole\n");

	const uint8_t head = logger_index.load() % SOCK_LOGGER_SIZE_MAX;

	uint8_t index = head;
	do {
	connection_logger[index].dump(fd);

	index++;
	index %= SOCK_LOGGER_SIZE_MAX;
	} while (index != head);
	dprintf(fd, "\n");
	}

	void SockConnectionEvent::dump(const int fd) {
	if (!used) {
	return;
	}

	char eventtime[20];
	char temptime[20];
	struct tm* tstamp = localtime(&timestamp.tv_sec);
	strftime(temptime, sizeof(temptime), "%H:%M:%S", tstamp);
	snprintf(eventtime, sizeof(eventtime), "%s.%03ld", temptime,
	timestamp.tv_nsec / 1000000);

	const char* str_state;
	switch (state) {
	case SOCKET_CONNECTION_STATE_LISTENING:
	str_state = "STATE_LISTENING";
	break;
	case SOCKET_CONNECTION_STATE_CONNECTING:
	str_state = "STATE_CONNECTING";
	break;
	case SOCKET_CONNECTION_STATE_CONNECTED:
	str_state = "STATE_CONNECTED";
	break;
	case SOCKET_CONNECTION_STATE_DISCONNECTING:
	str_state = "STATE_DISCONNECTING";
	break;
	case SOCKET_CONNECTION_STATE_DISCONNECTED:
	str_state = "STATE_DISCONNECTED";
	break;
	default:
	str_state = "STATE_UNKNOWN";
	break;
	}

	const char* str_role;
	switch (role) {
	case SOCKET_ROLE_LISTEN:
	str_role = "ROLE_LISTEN";
	break;
	case SOCKET_ROLE_CONNECTION:
	str_role = "ROLE_CONNECTION";
	break;
	default:
	str_role = "ROLE_UNKNOWN";
	break;
	}

	dprintf(fd, " %s\t%s\t%s \t%s\n", eventtime,
	ADDRESS_TO_LOGGABLE_CSTR(addr), str_state, str_role);
	}

	static bt_status_t btsock_control_req(uint8_t dlci, const RawAddress& bd_addr,
	uint8_t modem_signal,
	uint8_t break_signal,
	uint8_t discard_buffers,
	uint8_t break_signal_seq, bool fc) {
	return btsock_rfc_control_req(dlci, bd_addr, modem_signal, break_signal,
	discard_buffers, break_signal_seq, fc);
	}

	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;

	btif_sock_connection_logger(SOCKET_CONNECTION_STATE_LISTENING,
	SOCKET_ROLE_LISTEN, RawAddress::kEmpty);
	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) {
	btif_sock_connection_logger(SOCKET_CONNECTION_STATE_DISCONNECTED,
	SOCKET_ROLE_LISTEN, RawAddress::kEmpty);
	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);

	LOG_INFO("%s", __func__);

	*sock_fd = INVALID_FD;
	bt_status_t status = BT_STATUS_FAIL;

	btif_sock_connection_logger(SOCKET_CONNECTION_STATE_CONNECTING,
	SOCKET_ROLE_CONNECTION, *bd_addr);
	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) {
	btif_sock_connection_logger(SOCKET_CONNECTION_STATE_DISCONNECTED,
	SOCKET_ROLE_CONNECTION, *bd_addr);
	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;
	}
	}

	static bt_status_t btsock_disconnect_all(const RawAddress* bd_addr) {
	CHECK(bd_addr != NULL);

	bt_status_t rfc_status = btsock_rfc_disconnect(bd_addr);
	bt_status_t l2cap_status = btsock_l2cap_disconnect(bd_addr);
	/* SCO is disconnected via btif_hf, so is not handled here. */

	LOG_INFO("%s: rfc status: %d, l2cap status: %d", __func__, rfc_status,
	l2cap_status);

	/* Return error status, if any. */
	if (rfc_status == BT_STATUS_SUCCESS) {
	return l2cap_status;
	}
	return rfc_status;
	}