[ "$(uci -q get network.globals.ula_prefix)" != "auto" ] && exit 0
uci -q batch <<-EOF >/dev/null
set network.globals.ula_prefix="$(hexdump -vn 5 -e '"fd" 1/1 "%02x:" 2/2 "%x:"' /dev/urandom):/48"
commit network
EOF
exit 0