Challenge/response in client 1.1.6

Hi guys, It looks like the FreeRADIUS client library 1.1.6 doesn't handle challenge/response (code == PW_ACCESS_CHALLENGE). At the end of rc_send_server(), around line 390, only PW_ACCESS_ACCEPT, PW_PASSWORD_ACK, PW_ACCOUNTING_RESPONSE,PW_ACCESS_REJECT, and PW_PASSWORD_REJECT are valid responses. I'm working on a project that may require this functionality, so I'll look into adding it. I'll post what I can when I've got it. Unless I'm horribly wrong and there is already Access-Challenge support, in which case, please feel free to tell me how stupid I am and show me how to use it. Side note: Are PW_PASSWORD_{REQUEST,ACK,REJECT} experimental or extensions? I couldn't find them in RFC 2865. Thanks, ScottN