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#!/bin/sh
. /lib/functions.sh
. /lib/functions/system.sh
. /lib/ramips.sh
partname=""
offset=""
NEW_MAC=
YES=
board=$(ramips_board_name)
case $board in
witi)
partname=factory
offset=$((0xe000))
;;
*)
echo "Unsupported board"
exit 1
;;
esac
while [ -n "$1" ]; do
case "$1" in
??:??:??:??:??:??) NEW_MAC="$1";;
-y) YES=1;;
*)
cat <<EOF
Unknown option/argument '$1'
Usage: $0 [-y] [<macaddr>]
EOF
exit 1
;;
esac
shift
done
ask_bool() {
local message="$1"
local default="$((! ${2:-0}))"
[ -n "$YES" ] && return 0
echo -n "$message "
read opt
case "$opt" in
y|Y) return 0;;
n|N) return 1;;
*) return $default;;
esac
}
convert_hex() {
hexdump -e '/1 "%02x "'
}
gen_mac() {
dd if=/dev/urandom bs=6 count=1 2>/dev/null
}
mac="$(mtd_get_mac_binary $partname $offset)"
case "$mac" in
00:00:00:00:00:00);;
ff:ff:ff:ff:ff:ff);;
*)
echo "Current MAC address: $mac"
ask_bool "Overwrite (y/N)?" 0 || exit
;;
esac
if [ -n "$NEW_MAC" ]; then
set -- $(echo "$NEW_MAC" | sed 's,:, ,g')
else
set -- $(gen_mac | convert_hex)
set -- $(printf %02x $(( (0x$1 & 0xfe) | 0x02 ))) $2 $3 $4 $5 $6
fi
echo "New MAC address: $1:$2:$3:$4:$5:$6"
ask_bool "Write to EEPROM (y/N)?" || exit
part=$(find_mtd_part "$partname")
[ -n "$part" ] || exit
echo -ne "\x$1\x$2\x$3\x$4\x$5\x$6" | dd of=$part conv=notrunc bs=1 count=6 seek=$offset 2>/dev/null
echo "Done"
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