WARP Project Forums - Wireless Open-Access Research Platform

That's an interesting question. There isn't a way to access that info with wlan_exp in the reference code. But it would only require minor extensions to the C and Python to build this.

Line 957, 1058, and 1101 of wlan_mac_ap.c are the three places where the AP checks to see if the current transmit queue size is less than "max_queue_size". In the "else()" clause after those "if()" statements, you could add some C to increment global variables to track the number of drop events. From there, you can extend wlan_exp with a command to retrieve your new variables tracking the number of drops.