From: Paul Donald Date: Fri, 29 Mar 2024 15:04:30 +0000 (+0100) Subject: base-files: reduce IPv6 ULA prefix generation to a single call X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=27edf28b11f179eb9fc6ab159b68b2fe97ffdf1e;p=openwrt%2Fopenwrt.git base-files: reduce IPv6 ULA prefix generation to a single call Reduce calls and pipes and read from urandom once directly with hexdump for the necessary 5 bytes of random data to build the 48 bit ULA Prefix. Fewer calls and forks; finish quicker; less memory used. Tested on: 23.05.3 Signed-off-by: Paul Donald --- diff --git a/package/base-files/files/etc/uci-defaults/12_network-generate-ula b/package/base-files/files/etc/uci-defaults/12_network-generate-ula index 19d7ed7f2e..060d0ef640 100644 --- a/package/base-files/files/etc/uci-defaults/12_network-generate-ula +++ b/package/base-files/files/etc/uci-defaults/12_network-generate-ula @@ -1,11 +1,7 @@ [ "$(uci -q get network.globals.ula_prefix)" != "auto" ] && exit 0 -r1=$(dd if=/dev/urandom bs=1 count=1 |hexdump -e '1/1 "%02x"') -r2=$(dd if=/dev/urandom bs=2 count=1 |hexdump -e '2/1 "%02x"') -r3=$(dd if=/dev/urandom bs=2 count=1 |hexdump -e '2/1 "%02x"') - uci -q batch <<-EOF >/dev/null - set network.globals.ula_prefix=fd$r1:$r2:$r3::/48 + set network.globals.ula_prefix="$(hexdump -vn 5 -e '"fd" 1/1 "%02x:" 2/2 "%x:"' /dev/urandom):/48" commit network EOF