EAP-TTLS using OpenSSL

[Sankar Das]

Hi,
 
I am trying to implement a Radius Client with EAP-TTLS support. I'd like to use 
OpenSSL for SSL handshaking. The control packets i.e. Client Hello, Key 
Exchange etc needs to be encapsulated as AVP in Radius packet. Is there any API 
in OpenSSL library that I can use to create these control packets? Also I guess 
I need to use BIO library to get the packet buffer without actually sending it 
to socket. Is that correct?
 
Any help would be appreciated.
 
Thanks
Sankar