pam client -password change packet problem

pam_radius_auth.c if (password) { get_random_vector(request-vector); if (old_password) {/* password change request */ add_password(request, PW_PASSWORD, password, old_password); add_password(request, PW_OLD_PASSWORD, old_password, old_password); } else {/* authentication request */

PAM client password change

I see that http://www.freeradius.org/pam_radius_auth/README says This is the PAM to RADIUS authentication module. It allows any Linux or Solaris machine to become a RADIUS client for authentication and password change requests. ^ OK! But then