sandbox: eth: Add support for using the 'lo' interface
The 'lo' interface on Linux doesn't support thinks like ARP or
link-layer access like we use to talk to a normal network interface.
A higher-level network API must be used to access localhost.
As written, this interface is limited to not supporting ICMP since the
API doesn't allow the socket to be opened for all IP traffic and be able
to receive at the same time. UDP is far more useful to test with, so it
was selected over ICMP. Ping won't work, but things like TFTP should
work.
Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts
index 553bfbe..7d050d9 100644
--- a/arch/sandbox/dts/sandbox.dts
+++ b/arch/sandbox/dts/sandbox.dts
@@ -5,6 +5,7 @@
#size-cells = <1>;
aliases {
+ eth5 = "/eth@90000000";
pci0 = &pci;
};
@@ -212,4 +213,10 @@
reg = <0x80000000 0x1000>;
host-raw-interface = "eth0";
};
+
+ eth@90000000 {
+ compatible = "sandbox,eth-raw";
+ reg = <0x90000000 0x1000>;
+ host-raw-interface = "lo";
+ };
};