openwrt改变接口的mac地址

openwrt-change-intf-mac.sh

#!/bin/sh
# OpenWrt random mac address changer
# https://github.com/krabelize/openwrt-random-mac-changer

interface="wlan0"
current_mac=$(ifconfig ${interface} | grep "HWaddr" | awk '{print$5}')

new_mac=$(dd if=/dev/random bs=1 count=3 2>/dev/null | hexdump -C | head -1 | cut -d' ' -f2- | awk '{ print "34:36:3b:"$1":"$2":"$3 }')

if [ $? -eq 0 ]; then
    ifconfig $interface down
    ifconfig $interface hw ether $new_mac
    ifconfig $interface up

    if [ $? -eq 0 ]; then
        final_mac=$(ifconfig ${interface} | grep "HWaddr" | awk '{print$5}')
        logger "MAC address successfully changed for $interface from $current_mac to $new_mac, final_mac=$final_mac"
        exit 0
    fi
fi

logger "Failed to generate MAC address"
exit 1