passing data from PAM module to application

[Sudarshan Soma]

Hi All,
My PAM application uses remote authentication module
pam_radius_auth.so for authenticating users from remote servers. There
can be several remote servers. In this case, can any one please
suggest me the best way to gather information on several remote
servers such as
-- server reachability, (kind of returning  array saying server 1 is
reachable, server 2 is unreachable)
--  do they run radius service
...etc

I am trying to use pam_get_env pam_set_env for the above. Please
advise, if this is not the proper way.

I looked at pam_set_data, but i think this cant be used in PAM application.

Best Regards,