[openwrt/openwrt] build: add option to use preinit IP as LAN IP

[LEDE Commits]

stintel pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/baf76634f38d7415c3d8a5034f40b75e3612b967

commit baf76634f38d7415c3d8a5034f40b75e3612b967
Author: Stijn Tintel <stijn at linux-ipv6.be>
AuthorDate: Wed Dec 7 19:04:12 2022 +0200

    build: add option to use preinit IP as LAN IP
    
    We currently have build options to customize the IP address used in the
    preinit phase of the boot process, but not to set the default LAN IP.
    
    Introduce a boolean build option that, when enabled, results in the IP
    address configured for the preinit phase, to be also used as the default
    LAN IP address.
    
    Signed-off-by: Stijn Tintel <stijn at linux-ipv6.be>
---
 package/base-files/Makefile        | 13 +++++++++++++
 package/base-files/image-config.in |  7 +++++++
 2 files changed, 20 insertions(+)

diff --git a/package/base-files/Makefile b/package/base-files/Makefile
index 914f0598ff..8732f82fb9 100644
--- a/package/base-files/Makefile
+++ b/package/base-files/Makefile
@@ -89,6 +89,19 @@ define ImageConfigOptions
 	echo 'pi_preinit_net_messages="$(CONFIG_TARGET_PREINIT_SHOW_NETMSG)"' >>$(1)/lib/preinit/00_preinit.conf
 	echo 'pi_preinit_no_failsafe_netmsg="$(CONFIG_TARGET_PREINIT_SUPPRESS_FAILSAFE_NETMSG)"' >>$(1)/lib/preinit/00_preinit.conf
 	echo 'pi_preinit_no_failsafe="$(CONFIG_TARGET_PREINIT_DISABLE_FAILSAFE)"' >>$(1)/lib/preinit/00_preinit.conf
+ifeq ($(CONFIG_TARGET_DEFAULT_LAN_IP_FROM_PREINIT),y)
+	mkdir -p $(1)/etc/board.d
+	echo '. /lib/functions/uci-defaults.sh' >$(1)/etc/board.d/99-lan-ip
+	echo 'logger -t 99-lan-ip "setting custom default LAN IP"' >>$(1)/etc/board.d/99-lan-ip
+	echo 'board_config_update' >>$(1)/etc/board.d/99-lan-ip
+	echo 'json_select network' >>$(1)/etc/board.d/99-lan-ip
+	echo 'json_select lan' >>$(1)/etc/board.d/99-lan-ip
+	echo 'json_add_string ipaddr $(if $(CONFIG_TARGET_PREINIT_IP),$(CONFIG_TARGET_PREINIT_IP),"192.168.1.1")' >>$(1)/etc/board.d/99-lan-ip
+	echo 'json_add_string netmask $(if $(CONFIG_TARGET_PREINIT_NETMASK),$(CONFIG_TARGET_PREINIT_NETMASK),"255.255.255.0")' >>$(1)/etc/board.d/99-lan-ip
+	echo 'json_select ..' >>$(1)/etc/board.d/99-lan-ip
+	echo 'json_select ..' >>$(1)/etc/board.d/99-lan-ip
+	echo 'board_config_flush' >>$(1)/etc/board.d/99-lan-ip
+endif
 endef
 
 define Build/Prepare
diff --git a/package/base-files/image-config.in b/package/base-files/image-config.in
index ac406bc456..2de2130b84 100644
--- a/package/base-files/image-config.in
+++ b/package/base-files/image-config.in
@@ -5,6 +5,13 @@
 # See /LICENSE for more information.
 #
 
+config TARGET_DEFAULT_LAN_IP_FROM_PREINIT
+	bool "Use preinit IP configuration as default LAN IP" if IMAGEOPT
+	default n
+	help
+		Enabling this will set the default LAN IP address and netmask
+		to the preinit values set in the image config.
+
 menuconfig PREINITOPT
 	bool "Preinit configuration options" if IMAGEOPT
 	default n