[Buildroot] [git commit] Allow a single DHCP configuration via the system configuration submenu
Peter Korsgaard
peter at korsgaard.com
Mon Feb 2 20:42:47 UTC 2015
commit: http://git.buildroot.net/buildroot/commit/?id=f4f62a3c16f8591b14eedc3564599c6c807820b4
branch: http://git.buildroot.net/buildroot/commit/?id=refs/heads/master
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 at openwide.fr>
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
system/Config.in | 20 ++++++++++++++++++++
system/skeleton/etc/network/interfaces | 4 ----
system/system.mk | 29 +++++++++++++++++++++++++++++
3 files changed, 49 insertions(+), 4 deletions(-)
diff --git a/system/Config.in b/system/Config.in
index e9f2428..95e10ab 100644
--- a/system/Config.in
+++ b/system/Config.in
@@ -326,6 +326,26 @@ config BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW
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
bool "Install timezone info"
# No timezone for musl; only for uClibc or (e)glibc.
diff --git a/system/skeleton/etc/network/interfaces b/system/skeleton/etc/network/interfaces
deleted file mode 100644
index 218b82c..0000000
--- a/system/skeleton/etc/network/interfaces
+++ /dev/null
@@ -1,4 +0,0 @@
-# Configure Loopback
-auto lo
-iface lo inet loopback
-
diff --git a/system/system.mk b/system/system.mk
index e4a3160..4a1eb4a 100644
--- a/system/system.mk
+++ b/system/system.mk
@@ -38,6 +38,35 @@ ifneq ($(TARGET_GENERIC_ROOT_PASSWD),)
TARGETS += host-mkpasswd
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)
define SYSTEM_ROOT_PASSWD
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