kopia lustrzana https://github.com/espressif/esp-idf
66 wiersze
1.8 KiB
C
66 wiersze
1.8 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2022 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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/**
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* @file esp_pbuf reference
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* This file handles lwip custom pbufs interfacing with esp_netif
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* and the L2 free function esp_netif_free_rx_buffer()
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*/
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#include "lwip/mem.h"
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#include "lwip/esp_pbuf_ref.h"
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#include "esp_netif_net_stack.h"
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/**
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* @brief Specific pbuf structure for pbufs allocated by ESP netif
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* of PBUF_REF type
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*/
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typedef struct esp_custom_pbuf
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{
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struct pbuf_custom p;
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esp_netif_t *esp_netif;
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void* l2_buf;
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} esp_custom_pbuf_t;
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/**
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* @brief Free custom pbuf containing the L2 layer buffer allocated in the driver
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*
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* @param pbuf Custom pbuf holding the packet passed to lwip input
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* @note This function called as a custom_free_function() upon pbuf_free()
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*/
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static void esp_pbuf_free(struct pbuf *pbuf)
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{
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esp_custom_pbuf_t* esp_pbuf = (esp_custom_pbuf_t*)pbuf;
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esp_netif_free_rx_buffer(esp_pbuf->esp_netif, esp_pbuf->l2_buf);
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mem_free(pbuf);
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}
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/**
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* @brief Allocate custom pbuf for supplied sp_netif
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* @param esp_netif esp-netif handle
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* @param buffer Buffer to allocate
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* @param len Size of the buffer
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* @param l2_buff External l2 buffe
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* @return Custom pbuf pointer on success; NULL if no free heap
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*/
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struct pbuf* esp_pbuf_allocate(esp_netif_t *esp_netif, void *buffer, size_t len, void *l2_buff)
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{
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struct pbuf *p;
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esp_custom_pbuf_t* esp_pbuf = mem_malloc(sizeof(esp_custom_pbuf_t));
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if (esp_pbuf == NULL) {
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return NULL;
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}
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esp_pbuf->p.custom_free_function = esp_pbuf_free;
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esp_pbuf->esp_netif = esp_netif;
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esp_pbuf->l2_buf = l2_buff;
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p = pbuf_alloced_custom(PBUF_RAW, len, PBUF_REF, &esp_pbuf->p, buffer, len);
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if (p == NULL) {
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mem_free(esp_pbuf);
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return NULL;
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}
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return p;
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}
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