To measure throughput of DUT from linux server

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http://linuxexchange.org – Description of project->I have a test-tool to which DUT connects. The test-tool has an access-point in it and once DUT get connected to it via mac address we check RSSI and some other features of WiFi of DUT. Now I am wondering is there is any way I can measure throughput of Device under test via mac address of DUT from server side. Test tool has LINUX fedora 11 in it and major coding is done in c/C++ and json command. Previously, I have tried to install ftp server on test tool and DUT can connect to it and we can measure the throughput or data transfer rate, but this is not feasible s (HowTos)