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Allow a single DHCP configuration via the system configuration submenu

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This patch allows the setup of simple a single interface to be
automatically brought up and configured via DHCP on system startup.

The interface name can be set via a configuration option. This patch
does not support systemd-networkd, any complex network configuration should
be done via overlay of /etc/network/interfaces or the relevant networkd
configuration file

[Peter: rename to BR2_SYSTEM_DHCP, tweak help text & implementation]
Signed-off-by: Jérémy Rosen <jeremy.rosen@openwide.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Jeremy Rosen 2015-01-16 14:08:39 +01:00 committed by Peter Korsgaard
parent d538b8bf93
commit f4f62a3c16
3 changed files with 49 additions and 4 deletions
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20
system/Config.in
View File

@ -326,6 +326,26 @@ config BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW
endif # BR2_ROOTFS_SKELETON_DEFAULT endif # BR2_ROOTFS_SKELETON_DEFAULT
config BR2_SYSTEM_DHCP
string "Network interface to configure through DHCP"
default ""
depends on !BR2_PACKAGE_SYSTEMD_NETWORKD && (BR2_PACKAGE_BUSYBOX || BR2_PACKAGE_IFUPDOWN)
help
Enter here the name of the network interface (E.G. eth0) to
automatically configure through DHCP at bootup.
If left empty, no automatic DHCP requests will take place.
For more complicated network setups use an overlay to overwrite
/etc/network/interfaces or add a networkd configuration file.
comment "automatic network configuration via DHCP is not compatible with networkd"
depends on BR2_PACKAGE_SYSTEMD_NETWORKD
comment "automatic network configuration via DHCP needs ifupdown or busybox"
depends on !(BR2_PACKAGE_BUSYBOX || BR2_PACKAGE_IFUPDOWN)
config BR2_TARGET_TZ_INFO config BR2_TARGET_TZ_INFO
bool "Install timezone info" bool "Install timezone info"
# No timezone for musl; only for uClibc or (e)glibc. # No timezone for musl; only for uClibc or (e)glibc.

4
system/skeleton/etc/network/interfaces
View File

@ -1,4 +0,0 @@
# Configure Loopback
auto lo
iface lo inet loopback

29
system/system.mk
View File

@ -38,6 +38,35 @@ ifneq ($(TARGET_GENERIC_ROOT_PASSWD),)
TARGETS += host-mkpasswd TARGETS += host-mkpasswd
endif endif
define SET_NETWORK_LOCALHOST
( \
echo "# interface file auto-generated by buildroot"; \
echo ; \
echo "auto lo"; \
echo "iface lo inet loopback"; \
) > $(TARGET_DIR)/etc/network/interfaces
endef
NETWORK_DHCP_IFACE = $(call qstrip,$(BR2_SYSTEM_DHCP))
ifneq ($(NETWORK_DHCP_IFACE),)
define SET_NETWORK_DHCP
( \
echo ; \
echo "auto $(NETWORK_DHCP_IFACE)"; \
echo "iface $(NETWORK_DHCP_IFACE) inet dhcp"; \
) >> $(TARGET_DIR)/etc/network/interfaces
endef
endif
define SET_NETWORK
mkdir -p $(TARGET_DIR)/etc/network/
$(SET_NETWORK_LOCALHOST)
$(SET_NETWORK_DHCP)
endef
TARGET_FINALIZE_HOOKS += SET_NETWORK
ifeq ($(BR2_ROOTFS_SKELETON_DEFAULT),y) ifeq ($(BR2_ROOTFS_SKELETON_DEFAULT),y)
define SYSTEM_ROOT_PASSWD define SYSTEM_ROOT_PASSWD