HP Open Source Security for OpenVMS Volume 2: HP SSL for OpenVMS > SSL Application Programming Interface (API)
The SSL_*_ctrl() family of functions is used to manipulate settings of the SSL_CTX and SSL objects. Depending on the command cmd the arguments larg, parg, or fp are evaluated. These functions should never be called directly. All functionalities needed are made available via other functions or macros.
The return values of the SSL*_ctrl() functions depend on the command supplied via the cmd parameter.