TNC: Use TNC as phase2 method

[Masashi Honma]

Hello.

I can connect with TNC and MSCHAP.
wpa_supplicant is configured as below.
	phase2="auth=MSCHAP"

I can connect with TNC and MSCHAPv2 too.
	phase2="auth=MSCHAPV2"

But I can't connect with TNC as phase2 method.
	phase2="auth=TNC"

If phase2 method is not MSCHAPv2, "eap_ttls_process_msg" function
(in eap_server/eap_ttls.c) calls "eap_ttls_start_tnc" function
after "eap_ttls_process_phase2" function. When phase2 method = MSCHAP,
it works. But when phase2 method = TNC, it doesn't work.
Because TNCS send start frame twice.

Is TNC as phase2 method not supported ?

Regards,
Masashi Honma.