reboot upon loss of ping

From: James (wireless_at_tampabay.rr.com)
Date: 06/17/04

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    Date: Thu, 17 Jun 2004 20:50:54 GMT

    Hello,

    I have a piece of electrical (110Vac) equipment that has an ethernet
    port on it. It hangs periodically for unknown reasons. When we roll a
    truck and get a technician to cycle power, all if fine again and in
    answers the pings again(so we know it's alive.

    I have an embedded linux board, TS5500 that runs a 2.4 kernel and
    busybox. The distro is called TSlinux. And it has a Elan SC520 (386)
    processor.

    I'm bilding a board that has an npn transistor and a relay on it. The
    transistor will take the 3 vdc signal off the TS5500 board and send
    12vdc to the relay to make it go open momentarily.

    I need to write software that will determine when the pings are not
    being answered. Start a timer for 5 minutes. If the timer has not
    reset, due to pings getting answered, then the 3vdc signal will be
    generated on the TS5500 board.

    Anybody seen any code like this, or can you give me some ideas on how
    to determine when the pings are not being answered and how to set a
    bit in a register, or an entire byte, so as to status the device?

    Ideas and code fragments (ansi C or x86 assembler or shell)?

    James

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