134 lines
4.3 KiB
C
134 lines
4.3 KiB
C
/****************************************************************************
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* net/arp/arp_timer.c
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*
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* Copyright (C) 2007-2009, 2011, 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#ifdef CONFIG_NET
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#include <stdint.h>
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#include <time.h>
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#include <debug.h>
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#include <nuttx/wdog.h>
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#include <nuttx/net/netconfig.h>
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#include <arp/arp.h>
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#ifdef CONFIG_NET_ARP
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* ARP timer interval = 10 seconds. CLK_TCK is the number of clock ticks
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* per second
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*/
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#define ARPTIMER_WDINTERVAL (10*CLK_TCK)
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static WDOG_ID g_arptimer; /* ARP timer */
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Function: arptimer_poll
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*
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* Description:
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* Periodic timer handler. Called from the timer interrupt handler.
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*
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* Parameters:
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* argc - The number of available arguments
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* arg - The first argument
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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*
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****************************************************************************/
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static void arptimer_poll(int argc, wdparm_t arg, ...)
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{
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/* Call the ARP timer function every 10 seconds. */
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arp_timer();
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/* Setup the watchdog timer again */
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(void)wd_start(g_arptimer, ARPTIMER_WDINTERVAL, arptimer_poll, 0);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: arp_timer_initialize
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*
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* Description:
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* Initialized the 10 second timer that is need by the ARP logic in order
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* to age ARP address associations
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*
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* Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* Called once at system initialization time
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*
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****************************************************************************/
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void arp_timer_initialize(void)
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{
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/* Create and start the ARP timer */
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g_arptimer = wd_create();
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(void)wd_start(g_arptimer, ARPTIMER_WDINTERVAL, arptimer_poll, 0);
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}
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#endif /* CONFIG_NET_ARP */
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#endif /* CONFIG_NET */
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