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openwrt/target/linux/ramips/mt7621/base-files/sbin/fixup-mac-address
Adrian Schmutzler 19724e28c8 ramips: split base-files into subtargets
While most of the target's contents are split into subtargets, the
base-files are maintained for the target as a whole.

However, OpenWrt already implements a mechanism that will use (and
even prefer) files in the subtargets' directories. This can be
exploited to make several scripts subtarget-specific and thus save
some space.

In certain cases, keeping files in parent (=target) base-files was
more convenient, and thus no splitting was performed for those.

Note that this will increase overall code lines, but reduce code
per subtarget.

base-files ipk size reduction:
master (mt7621)   60958 B
split (mt7620)    46358 B (- 14.3 kiB)
split (mt7621)    48759 B (- 11.9 kiB)
split (mt76x8)    44948 B (- 15.6 kiB)
split (rt288x)    43508 B (- 17.0 kiB)
split (rt305x)    45616 B (- 15.0 kiB)
split (rt3883)    44176 B (- 16.4 kiB)

Run-tested on:
GL.iNet GL-MT300N-V2 (mt76x8)
D-Link DWR-116 (mt7620)

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2019-11-03 00:26:17 +01:00

81 lines
1.3 KiB
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Executable File

#!/bin/sh
. /lib/functions.sh
. /lib/functions/system.sh
partname=""
offset=""
NEW_MAC=
YES=
board=$(board_name)
case $board in
mqmaker,witi)
partname=factory
offset=$((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"