[B.A.T.M.A.N.] About making batman-adv mesh network invisible (by encrypting Beacon frame)

Hi community,

We have batman-adv + OpenWRT + ath9k chip + ath9k driver reliably running for about 2 years. The biggest batman-adv mesh network is with 100+ nodes.

As this is a closed network, we have a new requirement which is to make our batman-adv mesh network invisible, although the current SSID is just some meaningless characters.

One thought is hidden_ssid. But, it seems hidden_ssid is only supported for AP mode (not IBSS mode).

802.11w does not protect Beacon frame (because it is before four-ways handshake).

As this is a closed network, what about encrypting Beacon (maybe all management frames later) using a hard-coded key in wpa_supplicant?

Thanks for your help.

Xuebing Wang