sandbox: eth: Add a bridge to a real network for sandbox
Implement a bridge between U-Boot's network stack and Linux's raw packet
API allowing the sandbox to send and receive packets using the host
machine's network interface.
This raw Ethernet API requires elevated privileges. You can either run
as root, or you can add the capability needed like so:
sudo /sbin/setcap "CAP_NET_RAW+ep" /path/to/u-boot
Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/Makefile b/arch/sandbox/cpu/Makefile
index 7d4410c..1b42fee 100644
--- a/arch/sandbox/cpu/Makefile
+++ b/arch/sandbox/cpu/Makefile
@@ -8,6 +8,7 @@
#
obj-y := cpu.o os.o start.o state.o
+obj-$(CONFIG_ETH_SANDBOX_RAW) += eth-raw-os.o
obj-$(CONFIG_SANDBOX_SDL) += sdl.o
# os.c is build in the system environment, so needs standard includes
@@ -20,3 +21,12 @@
$(call if_changed_dep,cc_os.o)
$(obj)/sdl.o: $(src)/sdl.c FORCE
$(call if_changed_dep,cc_os.o)
+
+# eth-raw-os.c is built in the system env, so needs standard includes
+# CFLAGS_REMOVE_eth-raw-os.o cannot be used to drop header include path
+quiet_cmd_cc_eth-raw-os.o = CC $(quiet_modtag) $@
+cmd_cc_eth-raw-os.o = $(CC) $(filter-out -nostdinc, \
+ $(patsubst -I%,-idirafter%,$(c_flags))) -c -o $@ $<
+
+$(obj)/eth-raw-os.o: $(src)/eth-raw-os.c FORCE
+ $(call if_changed_dep,cc_eth-raw-os.o)