424 lines
13 KiB
C
424 lines
13 KiB
C
/****************************************************************************
|
|
* wireless/bluetooth/bt_conn.h
|
|
* Bluetooth connection handling.
|
|
*
|
|
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Ported from the Intel/Zephyr arduino101_firmware_source-v1.tar package
|
|
* where the code was released with a compatible 3-clause BSD license:
|
|
*
|
|
* Copyright (c) 2016, Intel Corporation
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived from this
|
|
* software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __WIRELESS_BLUETOOTH_BT_CONN_H
|
|
#define __WIRELESS_BLUETOOTH_BT_CONN_H 1
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <mqueue.h>
|
|
|
|
#include "bt_atomic.h"
|
|
|
|
/****************************************************************************
|
|
* Public Types
|
|
****************************************************************************/
|
|
|
|
enum bt_conn_state_e
|
|
{
|
|
BT_CONN_DISCONNECTED,
|
|
BT_CONN_CONNECT_SCAN,
|
|
BT_CONN_CONNECT,
|
|
BT_CONN_CONNECTED,
|
|
BT_CONN_DISCONNECT,
|
|
};
|
|
|
|
/* L2CAP signaling channel specific context */
|
|
|
|
struct bt_conn_l2cap_s
|
|
{
|
|
uint8_t ident;
|
|
};
|
|
|
|
/* bt_conn_s flags: the flags defined here represent connection parameters */
|
|
|
|
enum bt_conn_flags_e
|
|
{
|
|
BT_CONN_AUTO_CONNECT,
|
|
};
|
|
|
|
struct bt_conn_s
|
|
{
|
|
uint16_t handle;
|
|
uint8_t role;
|
|
bt_atomic_t flags[1];
|
|
|
|
bt_addr_le_t src;
|
|
bt_addr_le_t dst;
|
|
|
|
uint8_t encrypt;
|
|
|
|
uint16_t rx_len;
|
|
FAR struct bt_buf_s *rx;
|
|
|
|
/* Queue for outgoing ACL data */
|
|
|
|
mqd_t tx_queue;
|
|
|
|
FAR struct bt_keys_s *keys;
|
|
|
|
/* Fixed channel contexts */
|
|
|
|
struct bt_conn_l2cap_s l2cap;
|
|
FAR void *att;
|
|
FAR void *smp;
|
|
|
|
uint8_t le_conn_interval;
|
|
bt_atomic_t ref;
|
|
enum bt_conn_state_e state;
|
|
|
|
/* Temporary data used by ioctl */
|
|
|
|
void *p_iostate;
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_receive
|
|
*
|
|
* Description:
|
|
* Receive packets from the HCI core on a registered connection.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The registered connection
|
|
* buf - The buffer structure containing the received packet
|
|
* flags - Packet boundary flags
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void bt_conn_receive(FAR struct bt_conn_s *conn, FAR struct bt_buf_s *buf,
|
|
uint8_t flags);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_send
|
|
*
|
|
* Description:
|
|
* Send data over a connection
|
|
*
|
|
* Input Parameters:
|
|
* conn - The registered connection
|
|
* buf - The buffer structure containing the packet to be sent
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void bt_conn_send(FAR struct bt_conn_s *conn, FAR struct bt_buf_s *buf);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_add
|
|
*
|
|
* Description:
|
|
* Add a new connection
|
|
*
|
|
* Input Parameters:
|
|
* peer - The address of the Bluetooth peer
|
|
* role - Either BT_HCI_ROLE_MASTER or BT_HCI_ROLE_SLAVE
|
|
*
|
|
* Returned Value:
|
|
* A reference to the new connection structure is returned on success.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct bt_conn_s *bt_conn_add(FAR const bt_addr_le_t *peer, uint8_t role);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_set_state
|
|
*
|
|
* Description:
|
|
* Set connection object in certain state and perform actions related to
|
|
* state change.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The connection whose state will be changed.
|
|
* state - The new state of the connection.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void bt_conn_set_state(FAR struct bt_conn_s *conn, enum bt_conn_state_e state);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_lookup_handle
|
|
*
|
|
* Description:
|
|
* Look up an existing connection
|
|
*
|
|
* Input Parameters:
|
|
* handle - The handle to be used to perform the lookup
|
|
*
|
|
* Returned Value:
|
|
* A reference to the connection state instance is returned on success.
|
|
* NULL is returned if the connection is not found. On success, the
|
|
* caller gets a new reference to the connection object which must be
|
|
* released with bt_conn_release() once done using the connection.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct bt_conn_s *bt_conn_lookup_handle(uint16_t handle);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_lookup_addr_le
|
|
*
|
|
* Description:
|
|
* Look up an existing connection based on the remote address.
|
|
*
|
|
* Input Parameters:
|
|
* peer - Remote address.
|
|
*
|
|
* Returned Value:
|
|
* A reference to the connection state instance is returned on success.
|
|
* NULL is returned if the connection is not found. On success, the
|
|
* caller gets a new reference to the connection object which must be
|
|
* released with bt_conn_release() once done using the connection.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct bt_conn_s *bt_conn_lookup_addr_le(const bt_addr_le_t *peer);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_lookup_state
|
|
*
|
|
* Description:
|
|
* Look up a connection state. For BT_ADDR_LE_ANY, returns the first
|
|
* connection with the specific state
|
|
*
|
|
* Input Parameters:
|
|
* peer - The peer address to match
|
|
* state - The connection state to match
|
|
*
|
|
* Returned Value:
|
|
* A reference to the connection state instance is returned on success.
|
|
* NULL is returned if the connection is not found. On success, the
|
|
* caller gets a new reference to the connection object which must be
|
|
* released with bt_conn_release() once done using the connection.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct bt_conn_s *bt_conn_lookup_state(FAR const bt_addr_le_t *peer,
|
|
enum bt_conn_state_e state);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_addref
|
|
*
|
|
* Description:
|
|
* Increment the reference count of a connection object.
|
|
*
|
|
* Input Parameters:
|
|
* conn - Connection object.
|
|
*
|
|
* Returned Value:
|
|
* Connection object with incremented reference count.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct bt_conn_s *bt_conn_addref(FAR struct bt_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_release
|
|
*
|
|
* Description:
|
|
* Decrement the reference count of a connection object.
|
|
*
|
|
* Input Parameters:
|
|
* conn - Connection object.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void bt_conn_release(FAR struct bt_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_get_dst
|
|
*
|
|
* Description:
|
|
* Get destination (peer) address of a connection.
|
|
*
|
|
* Input Parameters:
|
|
* conn - Connection object.
|
|
*
|
|
* Returned Value:
|
|
* Destination address.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR const bt_addr_le_t *bt_conn_get_dst(FAR const struct bt_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_security
|
|
*
|
|
* Description:
|
|
* This function enable security (encryption) for a connection. If device is
|
|
* already paired with sufficiently strong key encryption will be enabled. If
|
|
* link is already encrypted with sufficiently strong key this function does
|
|
* nothing.
|
|
*
|
|
* If device is not paired pairing will be initiated. If device is paired and
|
|
* keys are too weak but input output capabilities allow for strong enough keys
|
|
* pairing will be initiated.
|
|
*
|
|
* This function may return error if required level of security is not possible
|
|
* to achieve due to local or remote device limitation (eg input output
|
|
* capabilities).
|
|
*
|
|
* Input Parameters:
|
|
* conn - Connection object.
|
|
* sec - Requested security level.
|
|
*
|
|
* Returned Value:
|
|
* 0 on success or negative error
|
|
*
|
|
****************************************************************************/
|
|
|
|
int bt_conn_security(FAR struct bt_conn_s *conn, enum bt_security_e sec);
|
|
|
|
/****************************************************************************
|
|
* Name:bt_conn_set_auto_conn
|
|
*
|
|
* Description:
|
|
* This function enables/disables automatic connection initiation.
|
|
* Every time the device looses the connection with peer, this connection
|
|
* will be re-established if connectible advertisement from peer is
|
|
* received.
|
|
*
|
|
* Input Parameters:
|
|
* conn - Existing connection object.
|
|
* auto_conn - boolean value. If true, auto connect is enabled, if false,
|
|
* auto connect is disabled.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void bt_conn_set_auto_conn(FAR struct bt_conn_s *conn, bool auto_conn);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_disconnect
|
|
*
|
|
* Description:
|
|
* Disconnect an active connection with the specified reason code or cancel
|
|
* pending outgoing connection.
|
|
*
|
|
* Input Parameters:
|
|
* conn - Connection to disconnect.
|
|
* reason - Reason code for the disconnection.
|
|
*
|
|
* Returned Value:
|
|
* Zero on success or (negative) error code on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int bt_conn_disconnect(FAR struct bt_conn_s *conn, uint8_t reason);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_create_le
|
|
*
|
|
* Description:
|
|
* Allows initiate new LE link to remote peer using its address.
|
|
* Returns a new reference that the the caller is responsible for managing.
|
|
*
|
|
* Input Parameters:
|
|
* peer - Remote address.
|
|
*
|
|
* Returned Value:
|
|
* Valid connection object on success or NULL otherwise.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct bt_conn_s *bt_conn_create_le(FAR const bt_addr_le_t *peer);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_le_start_encryption
|
|
*
|
|
* Description:
|
|
* See the HCI start encryption command.
|
|
*
|
|
* NOTE: rand and ediv should be in BT order.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The connection to send the command on.
|
|
* rand, ediv - Values to use for the encryption key
|
|
* ltk -
|
|
*
|
|
* Returned Value:
|
|
* Zero is returned on success; a negated errno value is returned on any
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int bt_conn_le_start_encryption(FAR struct bt_conn_s *conn, uint64_t rand,
|
|
uint16_t ediv, FAR const uint8_t *ltk);
|
|
|
|
/****************************************************************************
|
|
* Name: bt_conn_le_conn_update
|
|
*
|
|
* Description:
|
|
*
|
|
* Input Parameters:
|
|
*
|
|
* Returned Value:
|
|
* Zero is returned on success; a negated errno value is returned on any
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int bt_conn_le_conn_update(FAR struct bt_conn_s *conn, uint16_t min,
|
|
uint16_t max, uint16_t latency,
|
|
uint16_t timeout);
|
|
|
|
#endif /* __WIRELESS_BLUETOOTH_BT_CONN_H */
|