package/base-files/files/etc/uci-defaults/12_network-generate-ula

   1 #!/bin/sh
   2
   3 [ "$(uci get network.globals.ula_prefix)" != "auto" ] && exit 0
   4
   5 r1=$(dd if=/dev/urandom bs=1 count=1 |hexdump -e '1/1 "%02x"')
   6 r2=$(dd if=/dev/urandom bs=2 count=1 |hexdump -e '2/1 "%02x"')
   7 r3=$(dd if=/dev/urandom bs=2 count=1 |hexdump -e '2/1 "%02x"')
   8
   9 uci -q batch <<-EOF >/dev/null
  10         set network.globals.ula_prefix=fd$r1:$r2:$r3::/48
  11         commit network
  12 EOF
  13
  14 exit 0
  15