Function SSLGetNegotiatedProtocolVersion 

pub unsafe extern "C-unwind" fn SSLGetNegotiatedProtocolVersion(
    context: &SSLContext,
    protocol: NonNull<SSLProtocol>,
) -> i32

👎Deprecated: No longer supported. Use Network.framework.

Available on crate features SecProtocolTypes and SecureTransport only.

Safety

protocol must be a valid pointer.