int __ustream_ssl_set_key_file(struct ustream_ssl_ctx *ctx, const char *file);
int __ustream_ssl_set_ciphers(struct ustream_ssl_ctx *ctx, const char *ciphers);
int __ustream_ssl_set_require_validation(struct ustream_ssl_ctx *ctx, bool require);
+void __ustream_ssl_set_debug(struct ustream_ssl_ctx *ctx, int level, ustream_ssl_debug_cb cb, void *cb_priv);
void __ustream_ssl_context_free(struct ustream_ssl_ctx *ctx);
enum ssl_conn_status __ustream_ssl_connect(struct ustream_ssl *us);
int __ustream_ssl_read(struct ustream_ssl *us, char *buf, int len);