Hello Sergii, don't use the C daemon it has to many moving parts. I later wrote a perl module which is easy to use.
See: http://thomas.glanzmann.de/smsotpd.2012-10-05.tar.bz2 Follow the instructions in smsotpd.2012-10-05/rlm_perl/README If you have any further questions, let me know, but this should get you started quick. To my knowledge freeradius 3.0 does now everything to do smsotp natively, but I never took the time to try it. The above solution is running in production for 3000 users. In the tar ball is also a smsotp test client. Cheers, Thomas - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
