[openwrt/openwrt] base-files: use cidr for config_generate

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/d989d9a8ec4c94bd2185cac45ad9f3272ce100ac

commit d989d9a8ec4c94bd2185cac45ad9f3272ce100ac
Author: Vladislav Grigoryev <vg.aetera at gmail.com>
AuthorDate: Tue Oct 24 20:33:09 2023 +0300

    base-files: use cidr for config_generate
    
    Generate network configuration replacing netmask with CIDR.
    
    Depends on:
    https://github.com/openwrt/openwrt/pull/13765
    
    Using CIDR provides the following advantages:
    * Consolidate notation for IPv4 and IPv6 addresses.
    * Consolidate notation for IP addresses and routing targets.
    * Simplify network configuration and troubleshooting.
    * Follow the transition from net-tools to iproute2.
    
    Resulting configuration example:
    ```
    config interface 'loopback'
            option device 'lo'
            option proto 'static'
            list ipaddr '127.0.0.1/8'
    
    config interface 'lan'
            option device 'br-lan'
            option proto 'static'
            list ipaddr '192.168.1.1/24'
    ```
    
    Signed-off-by: Vladislav Grigoryev <vg.aetera at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/13780
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 package/base-files/files/bin/config_generate | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/package/base-files/files/bin/config_generate b/package/base-files/files/bin/config_generate
index fecf82fcaa..7507aa612c 100755
--- a/package/base-files/files/bin/config_generate
+++ b/package/base-files/files/bin/config_generate
@@ -3,6 +3,7 @@
 CFG=/etc/board.json
 
 . /usr/share/libubox/jshn.sh
+. /lib/functions/ipv4.sh
 
 [ -s $CFG ] || /bin/board_detect || exit 1
 [ -s /etc/config/network -a -s /etc/config/system ] && exit 0
@@ -42,8 +43,7 @@ generate_static_network() {
 		set network.loopback='interface'
 		set network.loopback.device='lo'
 		set network.loopback.proto='static'
-		set network.loopback.ipaddr='127.0.0.1'
-		set network.loopback.netmask='255.0.0.0'
+		add_list network.loopback.ipaddr='127.0.0.1/8'
 	EOF
 		[ -e /proc/sys/net/ipv6 ] && {
 			uci -q batch <<-EOF
@@ -160,18 +160,19 @@ generate_network() {
 
 	case "$protocol" in
 		static)
-			local ipad
+			local ipad netm prefix
 			case "$1" in
 				lan) ipad=${ipaddr:-"192.168.1.1"} ;;
 				*) ipad=${ipaddr:-"192.168.$((addr_offset++)).1"} ;;
 			esac
 
 			netm=${netmask:-"255.255.255.0"}
+			str2ip netm "$netm"
+			netmask2prefix prefix "$netm"
 
 			uci -q batch <<-EOF
 				set network.$1.proto='static'
-				set network.$1.ipaddr='$ipad'
-				set network.$1.netmask='$netm'
+				add_list network.$1.ipaddr='$ipad/$prefix'
 			EOF
 			[ -e /proc/sys/net/ipv6 ] && uci set network.$1.ip6assign='60'
 		;;