base-files: rename ULA generation script

[openwrt.git] / package / base-files / files / etc / uci-defaults / network-generate-ula

diff --git a/package/base-files/files/etc/uci-defaults/network-generate-ula b/package/base-files/files/etc/uci-defaults/network-generate-ula
new file mode 100644 (file)
index 0000000..f3e4931
--- /dev/null
+++ b/package/base-files/files/etc/uci-defaults/network-generate-ula
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+[ "$(uci get network.globals.ula_prefix)" != "auto" ] && exit 0
+# Sometimes results are empty, therefore try until it works...          
+local r1 r2 r3
+while [ -z "$r1" -o -z "$r2" -o -z "$r3" ]; do
+       r1=$(printf "%02x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 256)))
+       r2=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
+       r3=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
+done
+
+uci -q batch <<-EOF >/dev/null
+       set network.globals.ula_prefix=fd$r1:$r2:$r3::/48
+       commit network
+EOF
+
+exit 0
+