[Buildroot] [PATCH] set simple network setup via the system configuration submenu
Jeremy Rosen
jeremy.rosen at openwide.fr
Tue Oct 7 12:56:55 UTC 2014
bump ?
I can rebase if need be, but I'm pretty sure there are some comments
to be done on that...
----- Mail original -----
> This patch allows the setup of simple /etc/network/interfaces via the
> configuration menus instead of using an overlay
>
> * supports the loopback interface
> * supports one normal interface (renamable)
> * supports manual ipv4 configuration
> * supports dhcp configuration
>
> Signed-off-by: Jérémy Rosen <jeremy.rosen at openwide.fr>
>
> ---
>
> This patch is here to avoid having to do an overlay for the most
> common
> cases (ipv4 with fixed IP or DHCP)
>
> I can make it more complex (second network if, support ipv6)
> depending on
> what people want/need, but I want to keep it simple. The point is to
> avoid
> having to tweak overlays to change stuff that everybody needs to
> change for
> prototyping
>
> With regards to systemd, as far as I could figure it still uses
> /etc/network/interfaces but with different names. AFAIU there is no
> sane
> default to replace the "eth0" name so I did not put a different
> default
> when systemd is used
> ---
> Makefile | 1 +
> support/scripts/generate-interfaces.sh | 75
> ++++++++++++++++++++++++++++++++
> system/Config.in | 78
> ++++++++++++++++++++++++++++++++++
> 3 files changed, 154 insertions(+)
> create mode 100755 support/scripts/generate-interfaces.sh
>
> diff --git a/Makefile b/Makefile
> index e788f1b..71cad7d 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -477,6 +477,7 @@ $(BUILD_DIR)/.root:
> @ln -snf lib $(TARGET_DIR)/$(LIB_SYMLINK)
> @mkdir -p $(TARGET_DIR)/usr
> @ln -snf lib $(TARGET_DIR)/usr/$(LIB_SYMLINK)
> + ./support/scripts/generate-interfaces.sh $(TARGET_DIR)
> touch $@
>
> $(TARGET_DIR): $(BUILD_DIR)/.root
> diff --git a/support/scripts/generate-interfaces.sh
> b/support/scripts/generate-interfaces.sh
> new file mode 100755
> index 0000000..b685669
> --- /dev/null
> +++ b/support/scripts/generate-interfaces.sh
> @@ -0,0 +1,75 @@
> +#!/bin/sh
> +
> +
> +#extract our parameters from the config file
> +for PARAM in \
> + BR2_SIMPLE_NETWORK_LO_ENABLE \
> + BR2_SIMPLE_NETWORK_LO_AUTO \
> + \
> + BR2_SIMPLE_NETWORK_1_ENABLE \
> + BR2_SIMPLE_NETWORK_1_AUTO \
> + BR2_SIMPLE_NETWORK_1_IPV4_DHCP \
> + BR2_SIMPLE_NETWORK_1_IPV4_MANUAL \
> + ; do
> +TMP=$(sed -r -e "/^$PARAM=(.*)$/!d;" -e 's//\1/;' $BR2_CONFIG)
> + export $PARAM=$TMP
> +done
> +
> +for PARAM in \
> + BR2_SIMPLE_NETWORK_1_NAME \
> + BR2_SIMPLE_NETWORK_1_IPV4_ADDRESS \
> + BR2_SIMPLE_NETWORK_1_IPV4_NETMASK \
> + BR2_SIMPLE_NETWORK_1_IPV4_BROADCAST \
> + BR2_SIMPLE_NETWORK_1_IPV4_GATEWAY \
> + ; do
> +TMP=$(sed -r -e "/^$PARAM=\"(.*)\"$/!d;" -e 's//\1/;' $BR2_CONFIG)
> + export $PARAM=$TMP
> +done
> +
> +
> +
> +IFACE_FILE=$TARGET_DIR/etc/network/interfaces
> +echo -n > $IFACE_FILE # empty the file
> +
> +if [ $BR2_SIMPLE_NETWORK_LO_ENABLE ] ; then
> + if [ $BR2_SIMPLE_NETWORK_LO_AUTO ] ; then
> + echo "auto lo">> $IFACE_FILE
> + fi
> + echo "iface lo inet loopback">> $IFACE_FILE
> + echo >>$IFACE_FILE
> +fi
> +
> +if [ $BR2_SIMPLE_NETWORK_1_ENABLE ] ; then
> + if [ -z $BR2_SIMPLE_NETWORK_1_NAME ] ; then
> + echo ERROR no name specified for first network interface
> + exit 1
> + fi
> + if [ $BR2_SIMPLE_NETWORK_1_AUTO ] ; then
> + echo "auto $BR2_SIMPLE_NETWORK_1_NAME">> $IFACE_FILE
> + fi
> + if [ $BR2_SIMPLE_NETWORK_1_IPV4_DHCP ] ; then
> + echo "iface $BR2_SIMPLE_NETWORK_1_NAME inet dhcp">> $IFACE_FILE
> + elif [ $BR2_SIMPLE_NETWORK_1_IPV4_MANUAL ] ; then
> + for PARAM in \
> + BR2_SIMPLE_NETWORK_1_IPV4_ADDRESS \
> + BR2_SIMPLE_NETWORK_1_IPV4_NETMASK \
> + BR2_SIMPLE_NETWORK_1_IPV4_BROADCAST \
> + BR2_SIMPLE_NETWORK_1_IPV4_GATEWAY \
> + ; do
> + eval VALUE=\$$PARAM
> + if [ -z $VALUE ] ; then
> + echo ERROR $PARAM not set
> + exit 1
> + fi
> + done
> + echo "iface $BR2_SIMPLE_NETWORK_1_NAME inet static">> $IFACE_FILE
> + echo " address $BR2_SIMPLE_NETWORK_1_IPV4_ADDRESS">> $IFACE_FILE
> + echo " netmask $BR2_SIMPLE_NETWORK_1_IPV4_NETMASK">> $IFACE_FILE
> + echo " broadcast $BR2_SIMPLE_NETWORK_1_IPV4_BROADCAST">>
> $IFACE_FILE
> + echo " gateway $BR2_SIMPLE_NETWORK_1_IPV4_GATEWAY">> $IFACE_FILE
> + else
> + echo Incorrect buildroot configuration
> + exit 1
> + fi
> + echo >>$IFACE_FILE
> +fi
> diff --git a/system/Config.in b/system/Config.in
> index e7e146a..d5711bc 100644
> --- a/system/Config.in
> +++ b/system/Config.in
> @@ -389,4 +389,82 @@ config BR2_ROOTFS_POST_SCRIPT_ARGS
> directory / images directory. The arguments in this option will
> be
> passed *after* those.
>
> +menuconfig BR2_SIMPLE_NETWORK
> + bool "Generate simple network configuration"
> + default n
> + help
> + Use buildroot to set network configuration during the build
> process
> +
> +if BR2_SIMPLE_NETWORK
> +menuconfig BR2_SIMPLE_NETWORK_LO_ENABLE
> + bool "enable loopback device"
> + default y
> + help
> + Enables the loopback interface at startup
> +
> +if BR2_SIMPLE_NETWORK_LO_ENABLE
> +config BR2_SIMPLE_NETWORK_LO_AUTO
> + bool "enable loopback interface at startup"
> + default y
> + help
> + Should the loopback inteface be brought up automatically at
> startup
> +
> +endif
> +
> +menuconfig BR2_SIMPLE_NETWORK_1_ENABLE
> + bool "enable first network interface"
> + default y
> + help
> + Enable the first network interface
> +
> +if BR2_SIMPLE_NETWORK_1_ENABLE
> +config BR2_SIMPLE_NETWORK_1_AUTO
> + bool "enable first network interface at startup"
> + default y
> + help
> + Should the first network inteface be brought up automatically at
> startup
> +
> +config BR2_SIMPLE_NETWORK_1_NAME
> + string "name of the first physical network interface"
> + default "eth0"
> + help
> + The name used to recognise the first network interface as
> reported by the kernel
> +
> +choice
> + prompt "Configuration type"
> + default BR2_SIMPLE_NETWORK_1_DHCP
> + help
> + The type of configuration to use for the first physical
> interface
> +
> +config BR2_SIMPLE_NETWORK_1_IPV4_DHCP
> + bool "IPv4 with DHCP"
> + help
> + Use DHCP to configure this interface
> + using the IPv4 protocol
> +
> +config BR2_SIMPLE_NETWORK_1_IPV4_MANUAL
> + bool "IPv4 with parameters manually specified"
> + help
> + Configure IPv4 by specifying each parameter separately
> +endchoice
> +
> +if BR2_SIMPLE_NETWORK_1_IPV4_MANUAL
> +config BR2_SIMPLE_NETWORK_1_IPV4_ADDRESS
> + string "IP Address of the first network interface"
> +
> +config BR2_SIMPLE_NETWORK_1_IPV4_NETMASK
> + string "Netmask of the first network interface"
> +
> +config BR2_SIMPLE_NETWORK_1_IPV4_BROADCAST
> + string "Broadcast Address of the first network interface"
> +
> +config BR2_SIMPLE_NETWORK_1_IPV4_GATEWAY
> + string "Address of the gateway for the first network interface"
> +endif
> +
> +endif
> +
> +endif
> +
> +
> endmenu
> --
> 2.1.0
>
>
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