arduino-esp32/tools/sdk/include/lwip/arch/vfs_lwip.h

// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifdef __cplusplus
extern "C" {
#endif

/* Internal declarations used to ingreate LWIP port layer
   to ESP-IDF VFS for POSIX I/O.
*/
extern int lwip_socket_offset;

void esp_vfs_lwip_sockets_register();

#ifdef __cplusplus
}
#endif