3.2.5.5 Received EAP Success Packet
If the currentState variable is set to EAP_CHAP_SUCCESS_RESPONSE_SENT, then:
Obtain the Master Session Key (section 3.1.5.1) using AuthenticatorChallenge, PeerChallenge, Username, and Password.
Trigger the transport layer with the authentication result as Success, and pass the Master Session Key to the transport layer.
Set currentState to EAP_CHAP_SUCCESS.
If the currentState variable is not set to EAP_CHAP_SUCCESS_RESPONSE_SENT, the packet is ignored.