248 lines
7 KiB
C
248 lines
7 KiB
C
/**
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* @file
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* Ethernet Interface Skeleton
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*
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*/
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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#include "lwip/opt.h"
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#include "lwip/def.h"
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#include "lwip/mem.h"
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#include "lwip/pbuf.h"
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#include "lwip/stats.h"
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#include "lwip/snmp.h"
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#include "lwip/ethip6.h"
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#include "netif/etharp.h"
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#include "netif/wlanif.h"
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#include <stdio.h>
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#include <string.h>
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#include "tcpip_adapter.h"
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/**
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* In this function, the hardware should be initialized.
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* Called from ethernetif_init().
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*
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* @param netif the already initialized lwip network interface structure
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* for this ethernetif
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*/
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static void
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low_level_init(struct netif *netif)
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{
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/* set MAC hardware address length */
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netif->hwaddr_len = ETHARP_HWADDR_LEN;
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/* set MAC hardware address */
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/* maximum transfer unit */
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netif->mtu = 1500;
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/* device capabilities */
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/* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
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netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
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#if ESP_LWIP
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#if LWIP_IGMP
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netif->flags |= NETIF_FLAG_IGMP;
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#endif
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#endif
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#if !ESP_L2_TO_L3_COPY
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netif->l2_buffer_free_notify = esp_wifi_internal_free_rx_buffer;
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#endif
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}
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/**
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* This function should do the actual transmission of the packet. The packet is
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* contained in the pbuf that is passed to the function. This pbuf
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* might be chained.
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*
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* @param netif the lwip network interface structure for this ethernetif
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* @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
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* @return ERR_OK if the packet could be sent
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* an err_t value if the packet couldn't be sent
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*
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* @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
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* strange results. You might consider waiting for space in the DMA queue
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* to become availale since the stack doesn't retry to send a packet
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* dropped because of memory failure (except for the TCP timers).
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*/
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static err_t
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low_level_output(struct netif *netif, struct pbuf *p)
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{
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wifi_interface_t wifi_if = tcpip_adapter_get_esp_if(netif);
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struct pbuf *q = p;
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err_t ret;
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if (wifi_if >= ESP_IF_MAX) {
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return ERR_IF;
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}
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if(q->next == NULL) {
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ret = esp_wifi_internal_tx(wifi_if, q->payload, q->len);
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} else {
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LWIP_DEBUGF(PBUF_DEBUG, ("low_level_output: pbuf is a list, application may has bug"));
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q = pbuf_alloc(PBUF_RAW_TX, p->tot_len, PBUF_RAM);
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if (q != NULL) {
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q->l2_owner = NULL;
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pbuf_copy(q, p);
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} else {
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return ERR_MEM;
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}
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ret = esp_wifi_internal_tx(wifi_if, q->payload, q->len);
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pbuf_free(q);
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}
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return ret;
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}
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/**
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* This function should be called when a packet is ready to be read
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* from the interface. It uses the function low_level_input() that
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* should handle the actual reception of bytes from the network
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* interface. Then the type of the received packet is determined and
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* the appropriate input function is called.
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*
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* @param netif the lwip network interface structure for this ethernetif
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*/
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void
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wlanif_input(struct netif *netif, void *buffer, u16_t len, void* eb)
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{
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struct pbuf *p;
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if(!buffer || !netif_is_up(netif)) {
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if (eb) {
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esp_wifi_internal_free_rx_buffer(eb);
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}
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return;
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}
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#if (ESP_L2_TO_L3_COPY == 1)
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p = pbuf_alloc(PBUF_RAW, len, PBUF_RAM);
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if (p == NULL) {
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ESP_STATS_DROP_INC(esp.wlanif_input_pbuf_fail);
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esp_wifi_internal_free_rx_buffer(eb);
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return;
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}
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p->l2_owner = NULL;
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memcpy(p->payload, buffer, len);
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esp_wifi_internal_free_rx_buffer(eb);
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#else
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p = pbuf_alloc(PBUF_RAW, len, PBUF_REF);
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if (p == NULL){
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ESP_STATS_DROP_INC(esp.wlanif_input_pbuf_fail);
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esp_wifi_internal_free_rx_buffer(eb);
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return;
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}
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p->payload = buffer;
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p->l2_owner = netif;
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p->l2_buf = eb;
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#endif
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/* full packet send to tcpip_thread to process */
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if (netif->input(p, netif) != ERR_OK) {
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LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
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pbuf_free(p);
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}
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}
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/**
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* Should be called at the beginning of the program to set up the
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* network interface. It calls the function low_level_init() to do the
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* actual setup of the hardware.
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*
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* This function should be passed as a parameter to netif_add().
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*
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* @param netif the lwip network interface structure for this ethernetif
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* @return ERR_OK if the loopif is initialized
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* ERR_MEM if private data couldn't be allocated
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* any other err_t on error
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*/
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err_t
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wlanif_init(struct netif *netif)
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{
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LWIP_ASSERT("netif != NULL", (netif != NULL));
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#if LWIP_NETIF_HOSTNAME
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/* Initialize interface hostname */
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#if ESP_LWIP
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netif->hostname = "espressif";
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#else
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netif->hostname = "lwip";
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#endif
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#endif /* LWIP_NETIF_HOSTNAME */
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/*
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* Initialize the snmp variables and counters inside the struct netif.
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* The last argument should be replaced with your link speed, in units
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* of bits per second.
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*/
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NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 100);
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/* We directly use etharp_output() here to save a function call.
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* You can instead declare your own function an call etharp_output()
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* from it if you have to do some checks before sending (e.g. if link
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* is available...) */
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netif->output = etharp_output;
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#if LWIP_IPV6
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netif->output_ip6 = ethip6_output;
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#endif /* LWIP_IPV6 */
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netif->linkoutput = low_level_output;
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/* initialize the hardware */
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low_level_init(netif);
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return ERR_OK;
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}
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err_t wlanif_init_sta(struct netif *netif) {
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netif->name[0] = 's';
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netif->name[1] = 't';
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return wlanif_init(netif);
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}
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err_t wlanif_init_ap(struct netif *netif) {
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netif->name[0] = 'a';
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netif->name[1] = 'p';
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return wlanif_init(netif);
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}
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