Openwrt/target/linux/ramips/base-files/sbin/fixup-mac-address
Mathias Kresin a75ce960ac ramips: use different board names for variants
Use different names for flash size related board variants, to make sure
that only images for the actual flash size are considered as valid by
the image validation code.

Remove the flash size suffix from the string returned by
ramips_board_detect() to ensure that existing scripts relying on the
former used boardname are still working.

Signed-off-by: Mathias Kresin <dev@kresin.me>
2016-12-24 10:03:38 +01:00

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#!/bin/sh
. /lib/functions.sh
. /lib/functions/system.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"