+ wrlen = strlen(headers_out);
+ rv = apr_socket_send(ctrlsock, headers_out, &wrlen);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: send headers failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ apr_socket_shutdown(ctrlsock, APR_SHUTDOWN_READWRITE);