297 lines
8.9 KiB
C
297 lines
8.9 KiB
C
/****************************************************************************
|
|
* 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, IOBUSER_NET_SOCK_IEEE802154);
|
|
}
|
|
|
|
/* 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 */
|