78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
// 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.
|
|
|
|
#include <string.h>
|
|
#include <stdbool.h>
|
|
#include <stdarg.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/fcntl.h>
|
|
#include "esp_vfs.h"
|
|
#include "esp_vfs_dev.h"
|
|
#include "esp_attr.h"
|
|
#include "soc/uart_struct.h"
|
|
#include "lwip/sockets.h"
|
|
#include "sdkconfig.h"
|
|
|
|
/* LWIP is a special case for VFS use.
|
|
|
|
From the LWIP side:
|
|
- We set LWIP_SOCKET_OFFSET dynamically at VFS registration time so that native LWIP socket functions & VFS functions
|
|
see the same fd space. This is necessary to mix POSIX file operations defined in VFS with POSIX socket operations defined
|
|
in LWIP, without needing to wrap all of them.
|
|
|
|
From the VFS side:
|
|
- ESP_VFS_FLAG_SHARED_FD_SPACE is set, so unlike other VFS implementations the FDs that the LWIP "VFS" sees and the
|
|
FDs that the user sees are the same FDs.
|
|
*/
|
|
|
|
int lwip_socket_offset;
|
|
|
|
static int lwip_fcntl_r_wrapper(int fd, int cmd, va_list args);
|
|
static int lwip_ioctl_r_wrapper(int fd, int cmd, va_list args);
|
|
|
|
void esp_vfs_lwip_sockets_register()
|
|
{
|
|
esp_vfs_t vfs = {
|
|
.flags = ESP_VFS_FLAG_DEFAULT | ESP_VFS_FLAG_SHARED_FD_SPACE,
|
|
.write = &lwip_write_r,
|
|
.open = NULL,
|
|
.fstat = NULL,
|
|
.close = &lwip_close_r,
|
|
.read = &lwip_read_r,
|
|
.fcntl = &lwip_fcntl_r_wrapper,
|
|
.ioctl = &lwip_ioctl_r_wrapper,
|
|
};
|
|
int max_fd;
|
|
|
|
ESP_ERROR_CHECK(esp_vfs_register_socket_space(&vfs, NULL, &lwip_socket_offset, &max_fd));
|
|
|
|
/* LWIP can't be allowed to create more sockets than fit in the per-VFS fd space. Currently this isn't configurable
|
|
* but it's set much larger than CONFIG_LWIP_MAX_SOCKETS should ever be (max 2^12 FDs).
|
|
*/
|
|
assert(max_fd >= lwip_socket_offset && CONFIG_LWIP_MAX_SOCKETS <= max_fd - lwip_socket_offset);
|
|
}
|
|
|
|
static int lwip_fcntl_r_wrapper(int fd, int cmd, va_list args)
|
|
{
|
|
return lwip_fcntl_r(fd, cmd, va_arg(args, int));
|
|
}
|
|
|
|
static int lwip_ioctl_r_wrapper(int fd, int cmd, va_list args)
|
|
{
|
|
return lwip_ioctl_r(fd, cmd, va_arg(args, void *));
|
|
}
|
|
|
|
|