developping a custom authentication module

[Alan DeKok]

MACHANI Ouahiba wrote:
> I need to develop a custom authentication module to handle OTP
> authentication and integrate it to Freeradius server.
> 
> My questions are :
> 
> 1- are files with rlm_ prefix PAM modules or simply authentication modules?

  FreeRADIUS is not PAM.

> 2 - What should I write exactly other than an rlm_ file ?
> 3- For a good beginning, what are the files that I should read first ?

  The files in doc/ ?  There *is* documentation on the modules & the API.

  See also rlm_example

  Alan DeKok.