CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SESSION,
struct curl_tlssessioninfo **session);
This option has been superseded by CURLINFO_TLS_SSL_PTR(3) which
was added in 7.48.0. The only reason you would use this option instead is if
you could be using a version of libcurl earlier than 7.48.0.
This option is exactly the same as CURLINFO_TLS_SSL_PTR(3) except in the
case of OpenSSL. If the session backend is CURLSSLBACKEND_OPENSSL the
session internals pointer varies depending on the option:
CURLINFO_TLS_SESSION OpenSSL session internals is SSL_CTX *.
CURLINFO_TLS_SSL_PTR OpenSSL session internals is SSL *.
You can obtain an SSL_CTX pointer from an SSL pointer using OpenSSL function
SSL_get_SSL_CTX. Therefore unless you need compatibility with older versions of
libcurl use CURLINFO_TLS_SSL_PTR(3). Refer to that document for more