#!/bin/sh . /lib/functions.sh . /lib/functions/system.sh partname="" offset="" NEW_MAC= YES= board=$(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"