235 lines
7 KiB
C
Executable file
235 lines
7 KiB
C
Executable file
/**
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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 <stdio.h>
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#include <string.h>
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#include "esp_eth.h"
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#include "tcpip_adapter.h"
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/* Define those to better describe your network interface. */
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#define IFNAME0 'e'
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#define IFNAME1 'n'
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static char hostname[16];
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#if ESP_PERF
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uint32_t g_rx_alloc_pbuf_fail_cnt = 0;
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#endif
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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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ethernet_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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/* Do whatever else is needed to initialize interface. */
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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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ethernet_low_level_output(struct netif *netif, struct pbuf *p)
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{
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struct pbuf *q;
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esp_interface_t eth_if = tcpip_adapter_get_esp_if(netif);
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if (eth_if != ESP_IF_ETH) {
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printf("eth_if=%d netif=%p pbuf=%p len=%d\n", eth_if, netif, p, p->len);
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return ERR_IF;
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}
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#if ESP_LWIP
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q = p;
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u16_t pbuf_x_len = 0;
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pbuf_x_len = q->len;
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if(q->next !=NULL)
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{
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//char cnt = 0;
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struct pbuf *tmp = q->next;
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while(tmp != NULL)
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{
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memcpy( (u8_t *)( (u8_t *)(q->payload) + pbuf_x_len), (u8_t *)tmp->payload , tmp->len );
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pbuf_x_len += tmp->len;
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//cnt++;
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tmp = tmp->next;
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}
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}
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//printf("netif=%p pbuf=%p len=%d\n", netif, p, p->len);
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return esp_eth_tx(q->payload, pbuf_x_len);
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#else
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for(q = p; q != NULL; q = q->next) {
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return esp_emac_tx(q->payload, q->len);
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}
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return ERR_OK;
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#endif
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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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ethernetif_input(struct netif *netif, void *buffer, uint16_t len)
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{
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struct pbuf *p;
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if(buffer== NULL || netif == NULL)
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goto _exit;
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p = pbuf_alloc(PBUF_RAW, len, PBUF_RAM);
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if (p == NULL) {
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//g_rx_alloc_pbuf_fail_cnt++;
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return;
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}
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memcpy(p->payload, buffer, len);
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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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_exit:
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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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ethernetif_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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sprintf(hostname, "ESP_%02X%02X%02X", netif->hwaddr[3], netif->hwaddr[4], netif->hwaddr[5]);
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netif->hostname = hostname;
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#else
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sprintf(hostname, "ESP_%02X%02X%02X", netif->hwaddr[3], netif->hwaddr[4], netif->hwaddr[5]);
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netif->hostname = hostname;
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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, LINK_SPEED_OF_YOUR_NETIF_IN_BPS);
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netif->name[0] = IFNAME0;
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netif->name[1] = IFNAME1;
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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 = ethernet_low_level_output;
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/* initialize the hardware */
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ethernet_low_level_init(netif);
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return ERR_OK;
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}
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