This module is the library that freeradius-server will invoke when establishing the EAL/TTLS connection with wpa_supplicant. It is responsible for receiving the IMR from wpa_supplicant and reassembling it, and then invoking the verifyIMR library to validate that IMR. It will pass the recommendation as to whether or not to allow access back to freeradius for transmission to the switch.
Although separate, this module requires both freeradius-server, and verifyIMR to function.