nuttx/wireless/ieee802154/mac802154_rxenable.c

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/****************************************************************************
* wireless/ieee802154/mac802154_rxenable.c
*
* Copyright (C) 2016 Sebastien Lorquet. All rights reserved.
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Copyright (C) 2017 Verge Inc. All rights reserved.
*
* Author: Sebastien Lorquet <sebastien@lorquet.fr>
* Author: Gregory Nutt <gnutt@nuttx.org>
* Author: Anthony Merlino <anthony@vergeaero.com>
*
* 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 NuttX 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 OWNER 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <string.h>
#include "mac802154.h"
#include "mac802154_internal.h"
#include <nuttx/wireless/ieee802154/ieee802154_mac.h>
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static void mac802154_rxenabletimeout(FAR void *arg);
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: mac802154_rxenabletimeout
*
* Description:
* Function registered with MAC timer that gets called via the work queue to
* handle a timeout for extracting the Association Response from the
* Coordinator.
*
****************************************************************************/
static void mac802154_rxenabletimeout(FAR void *arg)
{
FAR struct ieee802154_privmac_s *priv =
(FAR struct ieee802154_privmac_s *)arg;
while (mac802154_lock(priv, true) != 0);
if (priv->curr_op != MAC802154_OP_RXENABLE)
{
mac802154_unlock(priv);
return;
}
mac802154_rxdisable(priv);
priv->curr_op = MAC802154_OP_NONE;
mac802154_givesem(&priv->opsem);
mac802154_unlock(priv)
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: mac802154_req_rxenable
*
* Description:
* The MLME-RX-ENABLE.request primitive allows the next higher layer to
* request that the receiver is enable for a finite period of time.
* Confirmation is returned via the
* struct mac802154_maccb_s->conf_rxenable callback.
*
****************************************************************************/
int mac802154_req_rxenable(MACHANDLE mac,
FAR struct ieee802154_rxenable_req_s *req)
{
FAR struct ieee802154_privmac_s * priv =
(FAR struct ieee802154_privmac_s *)mac;
int ret;
/* If this is a Beacon-enabled network */
if (priv->sfspec.sforder < 15)
{
return -EINVAL;
goto errout_with_sem;
}
/* Non-beacon enabled network */
else
{
if (req->rxon_dur > 0)
{
/* Get exlusive access to the operation sempaphore. This must
* happen before getting exclusive access to the MAC struct or
* else there could be a lockup condition. This would occur if
* another thread is using the cmdtrans but needs access to the
* MAC in order to unlock it.
*/
ret = mac802154_takesem(&priv->opsem, true);
if (ret < 0)
{
return ret;
}
priv->curr_op = MAC802154_OP_RXENABLE;
/* Get exclusive access to the MAC */
ret = mac802154_lock(priv, true);
if (ret < 0)
{
/* Should only fail if interrupted by a signal */
wlwarn("WARNING: mac802154_takesem failed: %d\n", ret);
mac802154_givesem(&priv->opsem);
return ret;
}
mac802154_rxenable(priv);
if (req->rxon_dur != 0xFFFFFFFF)
{
mac802154_timerstart(priv, req->rxon_dur,
mac802154_rxenabletimeout);
}
}
else
{
ret = mac802154_lock(priv, true);
if (ret < 0)
{
/* Should only fail if interrupted by a signal */
wlwarn("WARNING: mac802154_takesem failed: %d\n", ret);
return ret;
}
if (priv->curr_op != MAC802154_OP_RXENABLE)
{
ret = -EINVAL;
goto errout_with_sem;
}
mac802154_timercancel(priv);
mac802154_rxdisable(priv);
priv->curr_op = MAC802154_OP_NONE;
mac802154_givesem(&priv->opsem);
}
}
mac802154_unlock(priv)
return OK;
errout_with_sem:
mac802154_unlock(priv)
return ret;
}