Xiao Peng wrote:

I’m writing codes for a EAP-TTLS client, but I have some confusions when cope with diameter AVP format;

This is not a general help list for RADIUS or EAP topics. However, the source code to FreeRADIUS *is* available to you, and it *does* work with all known clients.

Would anyone please send me some logs of EAP-TTLS handshake? ( I mean, just the EAP-TTLS messages exchange between a server and a client, which I can use for illustration )

Install FreeRADIUS, configure *another* supplicant with TTLS, and get the logs yourself. Also, look at the EAP-TTLS code in FreeRADIUS for how the Diameter AVP format is handled. Alan DeKok.