3 [ "$(uci get network.globals.ula_prefix)" != "auto" ] && exit 0
4 # Sometimes results are empty, therefore try until it works...
6 while [ -z "$r1" -o -z "$r2" -o -z "$r3" ]; do
7 r1=$(printf "%02x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 256)))
8 r2=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
9 r3=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
12 uci -q batch <<-EOF >/dev/null
13 set network.globals.ula_prefix=fd$r1:$r2:$r3::/48