upscli_ssl_caps - Man Page

        #include <upsclient​.h>

        /* Header above defines bitmap values:
         * UPSCLI_SSL_CAPS_NONE         - No ability to use SSL
         * UPSCLI_SSL_CAPS_OPENSSL      - Can use OpenSSL-specific setup
         * UPSCLI_SSL_CAPS_NSS          - Can use Mozilla NSS-specific setup
         */

        int upscli_ssl_caps(void);
        const char *upscli_ssl_caps_descr(void);

The upscli_ssl_caps() function returns an int as a bitmap of SSL capability flags which may be of interest to the consumer of the upsclient(3) library (e​.g​. how to set up cryptographic material storage, and whether that should have any effect when initializing connections)​.

The upscli_ssl_caps_descr() function returns a string with such information primarily intended for humans, e​.g​. to be used in NUT client program banners​.

If there is no built-in SSL support, alternative methods like SSH tunnels or the stunnel tool can be explored​.

The upscli_ssl_caps() function effectively returns 0 if SSL support is missing, 1 if OpenSSL can be used, or 2 if Mozilla NSS can be used, since currently the backends are exclusive and it matters because they are differently capable​.

In the future it may return -1 in the event of an error, or e​.g​. 3 if both OpenSSL and Mozilla NSS could be supported simultaneously (current code structure does not allow for that though)​.

upscli_ssl(3), upscli_report_build_details(3)

upscli_add_host_cert(3), upscli_init(3), upscli_report_build_details(3), upscli_ssl(3).

The man page upscli_ssl_caps_descr(3) is an alias of upscli_ssl_caps(3).