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Diffstat (limited to 'nuttx/net/net_arptimer.c')
-rw-r--r-- | nuttx/net/net_arptimer.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/nuttx/net/net_arptimer.c b/nuttx/net/net_arptimer.c new file mode 100644 index 000000000..89db9f656 --- /dev/null +++ b/nuttx/net/net_arptimer.c @@ -0,0 +1,134 @@ +/**************************************************************************** + * net/net_arptimer.c + * + * Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <wdog.h> +#include <debug.h> + +#include <nuttx/net/uip/uipopt.h> +#include <nuttx/net/uip/uip-arp.h> + +#include "net_internal.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. */ + + uip_arp_timer(); + + /* Setup the watchdog timer again */ + + (void)wd_start(g_arptimer, ARPTIMER_WDINTERVAL, arptimer_poll, 0); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: arptimer_init + * + * Description: + * Initialized the 10 second timer that is need by uIP to age ARP + * associations + * + * Parameters: + * None + * + * Returned Value: + * None + * + * Assumptions: + * Called once at system initialization time + * + ****************************************************************************/ + +void arptimer_init(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 */ |