SSL_get_servername
LSSL_USED(SSL_get_servername);
LSSL_ALIAS(SSL_get_servername);
const char *SSL_get_servername(const SSL *s, const int type);
if ((name = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name)) ==
const char *hn = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
const char *servername = SSL_get_servername(s,