[TC-WAKEONLAN-4.1] Mac Address returned is Empty for wake-on-lan-mac-address attribute.

[Rajashreekalmane]

Problem
When running [TC_MC_4.1], Step 1, the Mac Address returned is Empty for wake-on-lan-mac-address attribute for the wakeonlan cluster.
Expect to see the mac address of the device, in this case, the Linux device running chip-tv-app.

Command used to build the TV-app
built the tv-app in linux using scripts/examples/gn_build_example.sh examples/tv-app/linux/ examples/tv-app/linux/out/tv-app chip_inet_config_enable_ipv4=false chip_enable_wake_on_lan=true

GitHub hash of the SDK that was being used
2767b51 - Master

PFA Log below

TC-WAKEONLAN-4.1.txt

[bzbarsky-apple]

The Linux version of WakeOnLanManager::HandleGetMacAddress is fairly broken (e.g. encodes char strings, not byte strings), but apart from that it seems to assume that /sys/class/net/eth0/address will exist and be the right thing, which it might well not be on the hardware you are running on... and it has no error handling around it not existing.

[chrisdecenzo]

We can fix this to work on the RPI dummy linux tv-app DUT but each real device will likely need to tweak the implementation to use the correct interface.

[bzbarsky-apple]

Sounds like the relevant part of the implementation should be in some sort of app-implemented provider instead of being hardcoded.....

[cjandhyala]

@chrisdecenzo as long as we have it fixed on RPI in the tv-app, QA can verify this TC on reference platform. For actual cert testing, since this is a manual test, we"ll have the ATL verify the actual MAC address.