u-boot/tools/netconsole
Joe Hershberger 7f51898c1b net: Make netconsole src and dest ports configurable
It is desirable to use different port numbers for sending and receiving
packets with netconsole in the case where you have more than one device
on the local subnet with netconsole enabled for broadcast.  When they
use the same port for both, any output from one will look like input to
the other.  This is typlically not desirable.

This patch allows the input and output ports to be specified separately
in the environment.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2012-09-24 13:17:24 -05:00

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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 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 [ -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 ${board_out_port} < /dev/null ; do
:
done
fi
) &
pid=$!
${nc} -u ${ip} ${board_in_port}
kill ${pid} 2>/dev/null