/****************************************************************************
* net/arp/arp_timer.c
*
* Copyright (C) 2007-2009, 2011, 2014 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. 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>
#ifdef CONFIG_NET
#include <stdint.h>
#include <time.h>
#include <debug.h>
#include <nuttx/wdog.h>
#include <nuttx/net/netconfig.h>
#include <arp/arp.h>
#ifdef CONFIG_NET_ARP
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* ARP timer interval = 10 seconds. CLK_TCK is the number of clock ticks
* per second
*/
#define ARPTIMER_WDINTERVAL (10*CLK_TCK)
/****************************************************************************
* Private Data
****************************************************************************/
static WDOG_ID g_arptimer; /* ARP timer */
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Function: arptimer_poll
*
* Description:
* Periodic timer handler. Called from the timer interrupt handler.
*
* Parameters:
* argc - The number of available arguments
* arg - The first argument
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void arptimer_poll(int argc, uint32_t arg, ...)
{
/* Call the ARP timer function every 10 seconds. */
arp_timer();
/* Setup the watchdog timer again */
(void)wd_start(g_arptimer, ARPTIMER_WDINTERVAL, arptimer_poll, 0);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: arp_timer_initialize
*
* Description:
* Initialized the 10 second timer that is need by the ARP logic in order
* to age ARP address associations
*
* Parameters:
* None
*
* Returned Value:
* None
*
* Assumptions:
* Called once at system initialization time
*
****************************************************************************/
void arp_timer_initialize(void)
{
/* Create and start the ARP timer */
g_arptimer = wd_create();
(void)wd_start(g_arptimer, ARPTIMER_WDINTERVAL, arptimer_poll, 0);
}
#endif /* CONFIG_NET_ARP */
#endif /* CONFIG_NET */
