As initially described, this is something which no test job should ever be doing. There will be no support for this kind of operation. You'll need to describe, in detail, exactly what you are trying to achieve. 

The only communication between the dispatcher and the server is ZMQ. The only communication between the DUT and the dispatcher is serial and there should never be transfer of files off the DUT to the dispatcher or the server.

There is support for publishing artifacts from the DUT but remember that LAVA is *not* a build farm. The publishing location needs to be configured and administered separately.