esp-idf/components/esp_netif/include/esp_netif_net_stack.h

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/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef _ESP_NETIF_NET_STACK_H_
#define _ESP_NETIF_NET_STACK_H_
#ifdef __cplusplus
extern "C" {
#endif
//
// Network stack API: This ESP-NETIF API are supposed to be called only from internals of TCP/IP stack
//
/** @addtogroup ESP_NETIF_CONVERT
* @{
*/
/**
* @brief Returns esp-netif handle
*
* @param[in] dev opaque ptr to network interface of specific TCP/IP stack
*
* @return handle to related esp-netif instance
*/
esp_netif_t* esp_netif_get_handle_from_netif_impl(void *dev);
/**
* @brief Returns network stack specific implementation handle (if supported)
*
* Note that it is not supported to acquire PPP netif impl pointer and
* this function will return NULL for esp_netif instances configured to PPP mode
*
* @param[in] esp_netif Handle to esp-netif instance
*
* @return handle to related network stack netif handle
*/
void* esp_netif_get_netif_impl(esp_netif_t *esp_netif);
/**
* @}
*/
/** @addtogroup ESP_NETIF_DATA_IO_API
* @{
*/
/**
* @brief Outputs packets from the TCP/IP stack to the media to be transmitted
*
* This function gets called from network stack to output packets to IO driver.
*
* @param[in] esp_netif Handle to esp-netif instance
* @param[in] data Data to be transmitted
* @param[in] len Length of the data frame
*
* @return ESP_OK on success, an error passed from the I/O driver otherwise
*/
esp_err_t esp_netif_transmit(esp_netif_t *esp_netif, void* data, size_t len);
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/**
* @brief Outputs packets from the TCP/IP stack to the media to be transmitted
*
* This function gets called from network stack to output packets to IO driver.
*
* @param[in] esp_netif Handle to esp-netif instance
* @param[in] data Data to be transmitted
* @param[in] len Length of the data frame
* @param[in] netstack_buf net stack buffer
*
* @return ESP_OK on success, an error passed from the I/O driver otherwise
*/
esp_err_t esp_netif_transmit_wrap(esp_netif_t *esp_netif, void *data, size_t len, void *netstack_buf);
/**
* @brief Free the rx buffer allocated by the media driver
*
* This function gets called from network stack when the rx buffer to be freed in IO driver context,
* i.e. to deallocate a buffer owned by io driver (when data packets were passed to higher levels
* to avoid copying)
*
* @param[in] esp_netif Handle to esp-netif instance
* @param[in] buffer Rx buffer pointer
*/
void esp_netif_free_rx_buffer(void *esp_netif, void* buffer);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif //_ESP_NETIF_NET_STACK_H_