ramips: add a script to fix up the broken mac address on the witi board

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48027

1 files changed, 79 insertions, 0 deletions

diff --git a/target/linux/ramips/base-files/sbin/fixup-mac-address b/target/linux/ramips/base-files/sbin/fixup-mac-address
new file mode 100755
index 0000000000..6e3bac4997
--- /dev/null
+++ b/target/linux/ramips/base-files/sbin/fixup-mac-address
@@ -0,0 +1,79 @@
+#!/bin/sh
+. /lib/functions.sh
+. /lib/functions/system.sh
+
+partname=""
+offset=""
+NEW_MAC=
+YES=
+
+case "$(cat /tmp/sysinfo/board_name)" in
+	witi)
+		partname=factory
+		offset=$((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"