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- /****************************************************************************
- * net/bluetooth/bluetooth_conn.c
- *
- * Copyright (C) 2018 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * 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. The name of the author may not be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <semaphore.h>
- #include <string.h>
- #include <assert.h>
- #include <errno.h>
- #include <debug.h>
- #include <netpacket/bluetooth.h>
- #include <arch/irq.h>
- #include <nuttx/mm/iob.h>
- #include <nuttx/net/netconfig.h>
- #include <nuttx/net/net.h>
- #include <nuttx/net/netdev.h>
- #include <nuttx/net/bluetooth.h>
- #include "devif/devif.h"
- #include "bluetooth/bluetooth.h"
- #ifdef CONFIG_NET_BLUETOOTH
- /****************************************************************************
- * Private Data
- ****************************************************************************/
- /* The array containing all packet socket connections. Protected via the
- * network lock.
- */
- static struct bluetooth_conn_s
- g_bluetooth_connections[CONFIG_NET_BLUETOOTH_NCONNS];
- /* A list of all free packet socket connections */
- static dq_queue_t g_free_bluetooth_connections;
- /* A list of all allocated packet socket connections */
- static dq_queue_t g_active_bluetooth_connections;
- static const bt_addr_t g_any_addr =
- {
- BT_ADDR_ANY
- };
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: bluetooth_conn_initialize
- *
- * Description:
- * Initialize the Bluetooth connection structure allocator. Called
- * once and only from bluetooth_initialize().
- *
- * Assumptions:
- * Called early in the initialization sequence
- *
- ****************************************************************************/
- void bluetooth_conn_initialize(void)
- {
- int i;
- /* Initialize the queues */
- dq_init(&g_free_bluetooth_connections);
- dq_init(&g_active_bluetooth_connections);
- for (i = 0; i < CONFIG_NET_BLUETOOTH_NCONNS; i++)
- {
- /* Link each pre-allocated connection structure into the free list. */
- dq_addlast(&g_bluetooth_connections[i].bc_node,
- &g_free_bluetooth_connections);
- }
- }
- /****************************************************************************
- * Name: bluetooth_conn_alloc()
- *
- * Description:
- * Allocate a new, uninitialized packet socket connection structure. This
- * is normally something done by the implementation of the socket() API
- *
- ****************************************************************************/
- FAR struct bluetooth_conn_s *bluetooth_conn_alloc(void)
- {
- FAR struct bluetooth_conn_s *conn;
- /* The free list is protected by the network lock */
- net_lock();
- conn = (FAR struct bluetooth_conn_s *)
- dq_remfirst(&g_free_bluetooth_connections);
- if (conn)
- {
- /* Enqueue the connection into the active list */
- memset(conn, 0, sizeof(struct bluetooth_conn_s));
- dq_addlast(&conn->bc_node, &g_active_bluetooth_connections);
- }
- net_unlock();
- return conn;
- }
- /****************************************************************************
- * Name: bluetooth_conn_free()
- *
- * Description:
- * Free a packet socket connection structure that is no longer in use.
- * This should be done by the implementation of close().
- *
- ****************************************************************************/
- void bluetooth_conn_free(FAR struct bluetooth_conn_s *conn)
- {
- FAR struct bluetooth_container_s *container;
- FAR struct bluetooth_container_s *next;
- /* The free list is protected by the network lock. */
- DEBUGASSERT(conn->bc_crefs == 0);
- /* Remove the connection from the active list */
- net_lock();
- dq_rem(&conn->bc_node, &g_active_bluetooth_connections);
- /* Check if there any any frames attached to the container */
- for (container = conn->bc_rxhead; container != NULL; container = next)
- {
- /* Remove the frame from the list */
- next = container->bn_flink;
- container->bn_flink = NULL;
- /* Free the contained frame data (should be only one in chain) */
- if (container->bn_iob)
- {
- iob_free(container->bn_iob);
- }
- /* And free the container itself */
- bluetooth_container_free(container);
- }
- /* Free the connection */
- dq_addlast(&conn->bc_node, &g_free_bluetooth_connections);
- net_unlock();
- }
- /****************************************************************************
- * Name: bluetooth_conn_active()
- *
- * Description:
- * Find a connection structure that is the appropriate
- * connection to be used with the provided Bluetooth header
- *
- * Assumptions:
- * This function is called from network logic at with the network locked.
- *
- ****************************************************************************/
- FAR struct bluetooth_conn_s *
- bluetooth_conn_active(FAR const struct bluetooth_frame_meta_s *meta)
- {
- FAR struct bluetooth_conn_s *conn;
- DEBUGASSERT(meta != NULL);
- for (conn = (FAR struct bluetooth_conn_s *)g_active_bluetooth_connections.head;
- conn != NULL;
- conn = (FAR struct bluetooth_conn_s *)conn->bc_node.flink)
- {
- /* Does the destination address match the bound address of the socket. */
- if ((BLUETOOTH_ADDRCMP(&conn->bc_raddr, &meta->bm_raddr) ||
- BLUETOOTH_ADDRCMP(&conn->bc_raddr, &g_any_addr)) &&
- (meta->bm_channel == conn->bc_channel ||
- BT_CHANNEL_ANY == conn->bc_channel))
- {
- continue;
- }
- }
- return conn;
- }
- /****************************************************************************
- * Name: bluetooth_conn_next()
- *
- * Description:
- * Traverse the list of allocated packet connections
- *
- * Assumptions:
- * This function is called from network logic at with the network locked.
- *
- ****************************************************************************/
- FAR struct bluetooth_conn_s *
- bluetooth_conn_next(FAR struct bluetooth_conn_s *conn)
- {
- if (!conn)
- {
- return (FAR struct bluetooth_conn_s *)
- g_active_bluetooth_connections.head;
- }
- else
- {
- return (FAR struct bluetooth_conn_s *)conn->bc_node.flink;
- }
- }
- #endif /* CONFIG_NET_BLUETOOTH */
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