Network configuration form buildroot menu (dhcp + static ip)

Hello,

I use the version 2015-02 of buildroot.
I want to configure the network interface as static ip. In the old version of buildroot, I modified the "interfaces" file located in output/target/etc/network/.
But now my settings are systematically re-written.
So I modified Config.in and system.mk to select the configuration directly in the menu of buildroot.

I hope it will be usefull for others users. so see below the diff file.

diff -u ../original/Config.in system/Config.in
@@ -326,7 +326,57 @@
 
 endif # BR2_ROOTFS_SKELETON_DEFAULT
 
+config BR2_SYSTEM_NETWORK
+menu "Network interface setting"
+	depends on !BR2_PACKAGE_SYSTEMD_NETWORKD && (BR2_PACKAGE_BUSYBOX ||

BR2_PACKAGE_IFUPDOWN)
+
+config BR2_SYSTEM_NETWORK_CONFIG
+choice
+ prompt "Network configuration"
+ default BR2_SYSTEM_NETWORK_NO_CONFIG
+ help
+ Select a configuration.
+
+config BR2_SYSTEM_NETWORK_NO_CONFIG
+ bool "no configuration"
+config BR2_SYSTEM_NETWORK_CONFIG_STATIC
+ bool "static ip"
+config BR2_SYSTEM_NETWORK_CONFIG_DHCP
+ bool "dhcp"
+endchoice
+
+if BR2_SYSTEM_NETWORK_CONFIG_STATIC
+config BR2_SYSTEM_NETWORK_CONFIG_STATIC_NAME
+ string "Network interface nane"
+ default "eth0"
+ help
+ Enter here the name of the network interface (E.G. eth0) to
+ automatically configure at bootup.

+config BR2_SYSTEM_NETWORK_CONFIG_STATIC_IP
+ string "Network static ip address"
+ default ""
+ help
+ Enter here the ip address of the network interface (E.G. 192.168.0.1)
+ to automatically configure at bootup.
+
+config BR2_SYSTEM_NETWORK_CONFIG_STATIC_MASK
+ string "Network static netmask"
+ default "255.255.255.0"
+ help
+ Enter here the netmask of the network interface (E.G. 255.255.255.0)
+ to automatically configure at bootup.
+
+config BR2_SYSTEM_NETWORK_CONFIG_STATIC_GW
+ string "Network static ip gateway address"
+ default ""
+ help
+ Enter here the ip gateway address of the network interface
+ to automatically configure at bootup.
+endif
+
+
+if BR2_SYSTEM_NETWORK_CONFIG_DHCP
config BR2_SYSTEM_DHCP
string "Network interface to configure through DHCP" default ""
@@ -345,6 +395,11 @@

comment "automatic network configuration via DHCP needs ifupdown or
busybox"
depends on !(BR2_PACKAGE_BUSYBOX || BR2_PACKAGE_IFUPDOWN)
+endif #BR2_SYSTEM_NETWORK_CONFIG_DHCP
+
+endmenu
+
+

config BR2_TARGET_TZ_INFO
bool "Install timezone info"
Seulement dans system/: Config.in~
Seulement dans system/: device_table_dev.txt
Seulement dans system/: device_table.txt
Seulement dans system/: skeleton

diff -u ../original/system.mk system/system.mk
@@ -59,10 +59,28 @@
 endef
 endif
 
+
+NETWORK_STATIC_IFACE = $(call

qstrip,$(BR2_SYSTEM_NETWORK_CONFIG_STATIC_NAME))
+ifneq ($(NETWORK_STATIC_IFACE),)
+define SET_NETWORK_STATIC
+ ( \
+ echo ; \
+ echo "auto $(NETWORK_STATIC_IFACE)"; \
+ echo "iface $(NETWORK_STATIC_IFACE) inet static"; \

+        echo "     address $(BR2_SYSTEM_NETWORK_CONFIG_STATIC_IP)"; \
+        echo "     netmask $(BR2_SYSTEM_NETWORK_CONFIG_STATIC_MASK)"; \
+        echo "     gateway $(BR2_SYSTEM_NETWORK_CONFIG_STATIC_GW)"; \

+ ) >> $(TARGET_DIR)/etc/network/interfaces
+endef
+endif
+
+
+
define SET_NETWORK
mkdir -p $(TARGET_DIR)/etc/network/
$(SET_NETWORK_LOCALHOST)
$(SET_NETWORK_DHCP)
+ $(SET_NETWORK_STATIC)
endef

TARGET_FINALIZE_HOOKS += SET_NETWORK
Seulement dans system/: system.mk~

Dear thln,

We don't want to support each and every crazy possible configuration using new Buildroot options. When the "simple network config" patch was accepted, we agreed on only supporting DHCP and that's it.

If you want to customize /etc/network/interfaces, please do so in a post-build script, or using a rootfs overlay. Both are done *after* the "simple network config" customization, so they will override it.

Best regards,

Thomas

Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com