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https://github.com/espressif/esp-idf.git
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111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2017-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <string.h>
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#include <stdbool.h>
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#include <stdarg.h>
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#include <sys/errno.h>
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#include <sys/lock.h>
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#include <sys/fcntl.h>
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#include "esp_attr.h"
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#include "esp_vfs.h"
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#include "sdkconfig.h"
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#include "lwip/sockets.h"
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#include "lwip/sys.h"
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#ifndef CONFIG_VFS_SUPPORT_IO
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#error This file should only be built when CONFIG_VFS_SUPPORT_IO=y
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#endif
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_Static_assert(MAX_FDS >= CONFIG_LWIP_MAX_SOCKETS, "MAX_FDS < CONFIG_LWIP_MAX_SOCKETS");
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#ifdef CONFIG_VFS_SUPPORT_SELECT
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/**
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* @brief This function is implemented only in FreeRTOS port (ingroup sys_sem)
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* and has no official API counterpart in lwip's sys.h declarations
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* Signals a semaphore from ISR
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* @param sem the semaphore to signal
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* @return 1 if the signal has caused a high-prio task to unblock (pxHigherPriorityTaskWoken)
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*/
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int sys_sem_signal_isr(sys_sem_t *sem);
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static void lwip_stop_socket_select(void *sem)
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{
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sys_sem_signal(sem); //socket_select will return
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}
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static void lwip_stop_socket_select_isr(void *sem, BaseType_t *woken)
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{
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if (sys_sem_signal_isr(sem) && woken) {
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*woken = pdTRUE;
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}
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}
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static void *lwip_get_socket_select_semaphore(void)
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{
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/* Calling this from the same process as select() will ensure that the semaphore won't be allocated from
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* ISR (lwip_stop_socket_select_isr).
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*/
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return (void *) sys_thread_sem_get();
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}
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#else // CONFIG_VFS_SUPPORT_SELECT
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int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *timeout)
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{
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return lwip_select(nfds, readfds, writefds, errorfds, timeout);
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}
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#endif // CONFIG_VFS_SUPPORT_SELECT
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static int lwip_fcntl_r_wrapper(int fd, int cmd, int arg)
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{
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return lwip_fcntl(fd, cmd, arg);
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}
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static int lwip_ioctl_r_wrapper(int fd, int cmd, va_list args)
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{
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return lwip_ioctl(fd, cmd, va_arg(args, void *));
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}
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static int lwip_fstat(int fd, struct stat * st)
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{
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if (st == NULL || fd < LWIP_SOCKET_OFFSET || fd > (MAX_FDS - 1)) {
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errno = EBADF;
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return -1;
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}
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memset(st, 0, sizeof(*st));
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/* set the stat mode to socket type */
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st->st_mode = S_IFSOCK;
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return 0;
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}
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void esp_vfs_lwip_sockets_register(void)
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{
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esp_vfs_t vfs = {
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.flags = ESP_VFS_FLAG_DEFAULT,
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.write = &lwip_write,
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.open = NULL,
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.fstat = &lwip_fstat,
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.close = &lwip_close,
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.read = &lwip_read,
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.fcntl = &lwip_fcntl_r_wrapper,
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.ioctl = &lwip_ioctl_r_wrapper,
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#ifdef CONFIG_VFS_SUPPORT_SELECT
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.socket_select = &lwip_select,
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.get_socket_select_semaphore = &lwip_get_socket_select_semaphore,
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.stop_socket_select = &lwip_stop_socket_select,
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.stop_socket_select_isr = &lwip_stop_socket_select_isr,
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#endif // CONFIG_VFS_SUPPORT_SELECT
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};
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/* Non-LWIP file descriptors are from 0 to (LWIP_SOCKET_OFFSET-1). LWIP
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* file descriptors are registered from LWIP_SOCKET_OFFSET to
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* MAX_FDS-1.
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*/
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ESP_ERROR_CHECK(esp_vfs_register_fd_range(&vfs, NULL, LWIP_SOCKET_OFFSET, MAX_FDS));
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}
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