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#!/bin/sh
usage() {
(
echo "Usage: $0 <board-IP> [board-port [board-in-port]]"
echo ""
echo "If port is not specified, '6666' will be used"
[ -z "$*" ] && exit 0
echo ""
echo "ERROR: $*"
exit 1
) 1>&2
exit $?
}
while [ -n "$1" ] ; do
case $1 in
-h|--help) usage;;
--) break;;
-*) usage "Invalid option $1";;
*) break;;
esac
shift
done
ip=$1
board_out_port=${2:-6666}
board_in_port=${3:-${board_out_port}}
echo Board out port: ${board_out_port}
echo Board in port: ${board_in_port}
if [ -z "${ip}" ] || [ -n "$4" ] ; then
usage "Invalid number of arguments"
fi
for nc in socat netcat nc ; do
type ${nc} >/dev/null 2>&1 && break
done
trap "stty icanon echo intr ^C" 0 2 3 5 10 13 15
echo "NOTE: the interrupt signal (normally ^C) has been remapped to ^T"
stty -icanon -echo intr ^T
(
if type ncb 2>/dev/null ; then
# see if ncb is in $PATH
exec ncb ${board_out_port}
elif [ "${nc}" = "socat" ] ; then
# socat does support broadcast
while ${nc} STDIO "UDP4-LISTEN:${board_out_port}"; do :; done
elif [ -x ${0%/*}/ncb ] ; then
# maybe it's in the same dir as the netconsole script
exec ${0%/*}/ncb ${board_out_port}
else
# blah, just use regular netcat
while ${nc} -u -l -p ${board_out_port} < /dev/null ; do
:
done
fi
) &
pid=$!
if [ "${nc}" = "socat" ] ; then
${nc} - "UDP4:${ip}:${board_in_port}"
else
${nc} -u ${ip} ${board_in_port}
fi
kill ${pid} 2>/dev/null
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