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- /****************************************************************************
- * net/ieee802154/ieee802154_conn.c
- *
- * Copyright (C) 2017 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 <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/wireless/ieee802154/ieee802154_mac.h>
- #include "devif/devif.h"
- #include "ieee802154/ieee802154.h"
- #ifdef CONFIG_NET_IEEE802154
- /****************************************************************************
- * Private Data
- ****************************************************************************/
- /* The array containing all packet socket connections. Protected via the
- * network lock.
- */
- static struct ieee802154_conn_s
- g_ieee802154_connections[CONFIG_NET_IEEE802154_NCONNS];
- /* A list of all free packet socket connections */
- static dq_queue_t g_free_ieee802154_connections;
- /* A list of all allocated packet socket connections */
- static dq_queue_t g_active_ieee802154_connections;
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: ieee802154_conn_initialize
- *
- * Description:
- * Initialize the IEEE 802.15.4 connection structure allocator. Called
- * once and only from ieee802154_initialize().
- *
- * Assumptions:
- * Called early in the initialization sequence
- *
- ****************************************************************************/
- void ieee802154_conn_initialize(void)
- {
- int i;
- /* Initialize the queues */
- dq_init(&g_free_ieee802154_connections);
- dq_init(&g_active_ieee802154_connections);
- for (i = 0; i < CONFIG_NET_IEEE802154_NCONNS; i++)
- {
- /* Link each pre-allocated connection structure into the free list. */
- dq_addlast(&g_ieee802154_connections[i].node,
- &g_free_ieee802154_connections);
- }
- }
- /****************************************************************************
- * Name: ieee802154_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 ieee802154_conn_s *ieee802154_conn_alloc(void)
- {
- FAR struct ieee802154_conn_s *conn;
- /* The free list is protected by the network lock. */
- net_lock();
- conn = (FAR struct ieee802154_conn_s *)
- dq_remfirst(&g_free_ieee802154_connections);
- if (conn)
- {
- /* Enqueue the connection into the active list */
- memset(conn, 0, sizeof(struct ieee802154_conn_s));
- dq_addlast(&conn->node, &g_active_ieee802154_connections);
- }
- net_unlock();
- return conn;
- }
- /****************************************************************************
- * Name: ieee802154_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 ieee802154_conn_free(FAR struct ieee802154_conn_s *conn)
- {
- FAR struct ieee802154_container_s *container;
- FAR struct ieee802154_container_s *next;
- /* The free list is protected by the network lock. */
- DEBUGASSERT(conn->crefs == 0);
- /* Remove the connection from the active list */
- net_lock();
- dq_rem(&conn->node, &g_active_ieee802154_connections);
- /* Check if there any any frames attached to the container */
- for (container = conn->rxhead; container != NULL; container = next)
- {
- /* Remove the frame from the list */
- next = container->ic_flink;
- container->ic_flink = NULL;
- /* Free the contained frame data (should be only one in chain) */
- if (container->ic_iob)
- {
- iob_free(container->ic_iob);
- }
- /* And free the container itself */
- ieee802154_container_free(container);
- }
- /* Free the connection */
- dq_addlast(&conn->node, &g_free_ieee802154_connections);
- net_unlock();
- }
- /****************************************************************************
- * Name: ieee802154_conn_active()
- *
- * Description:
- * Find a connection structure that is the appropriate
- * connection to be used with the provided IEEE 802.15.4 header
- *
- * Assumptions:
- * This function is called from network logic at with the network locked.
- *
- ****************************************************************************/
- FAR struct ieee802154_conn_s *
- ieee802154_conn_active(FAR const struct ieee802154_data_ind_s *meta)
- {
- FAR struct ieee802154_conn_s *conn;
- DEBUGASSERT(meta != NULL);
- for (conn = (FAR struct ieee802154_conn_s *)g_active_ieee802154_connections.head;
- conn != NULL;
- conn = (FAR struct ieee802154_conn_s *)conn->node.flink)
- {
- /* Does the destination address match the bound address of the socket.
- *
- * REVISIT: Currently and explicit address must be assigned. Should we
- * support some moral equivalent to INADDR_ANY?
- */
- if (meta->dest.mode != conn->laddr.s_mode)
- {
- continue;
- }
- if (meta->dest.mode == IEEE802154_ADDRMODE_SHORT &&
- !IEEE802154_SADDRCMP(meta->dest.saddr, conn->laddr.s_saddr))
- {
- continue;
- }
- if (meta->dest.mode == IEEE802154_ADDRMODE_EXTENDED &&
- !IEEE802154_EADDRCMP(meta->dest.saddr, conn->laddr.s_eaddr))
- {
- continue;
- }
- /* Is the socket "connected?" to a remote peer? If so, check if the
- * source address matches the connected remote adress.
- */
- switch (conn->raddr.s_mode)
- {
- case IEEE802154_ADDRMODE_NONE:
- return conn; /* No.. accept the connection */
- case IEEE802154_ADDRMODE_SHORT:
- if (IEEE802154_SADDRCMP(meta->dest.saddr, conn->raddr.s_saddr))
- {
- return conn;
- }
- break;
- case IEEE802154_ADDRMODE_EXTENDED:
- if (IEEE802154_EADDRCMP(meta->dest.eaddr, conn->raddr.s_eaddr))
- {
- return conn;
- }
- break;
- default:
- nerr("ERROR: Invalid address mode: %u\n", conn->raddr.s_mode);
- return NULL;
- }
- }
- return conn;
- }
- /****************************************************************************
- * Name: ieee802154_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 ieee802154_conn_s *
- ieee802154_conn_next(FAR struct ieee802154_conn_s *conn)
- {
- if (!conn)
- {
- return (FAR struct ieee802154_conn_s *)
- g_active_ieee802154_connections.head;
- }
- else
- {
- return (FAR struct ieee802154_conn_s *)conn->node.flink;
- }
- }
- #endif /* CONFIG_NET_IEEE802154 */
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