Difference between SSL_set_connect_state and SSL_connect

Question

I am just starting to learn openssl for C. I am having some trouble figuring out the difference between the SSL_set_connect_state function and the SSL_connect function as they seem to do thee same thing on my system. Could someone explain what the difference is?

Answer 1

SSL_connect invokes SSL_do_handshake, which performs the actual SSL handshake after invoking SSL_set_connect_state.

Full function:

int SSL_connect(SSL *s)
{
    if (s->handshake_func == NULL) {
        /* Not properly initialized yet */
        SSL_set_connect_state(s);
    }

    return SSL_do_handshake(s);
}