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network examples: Multiple ethernet interfaces and VLAN support.

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Closes https://github.com/espressif/esp-idf/issues/8807
This commit is contained in:
Abhik Roy
2022-08-23 01:05:30 +05:30
parent 99f836e07a
commit f3cc6d4b59
9 changed files with 612 additions and 0 deletions
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53
examples/network/vlan_support/main/vlan_hooks.h Normal file
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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Unlicense OR CC0-1.0
*/
#include "lwip/netif.h"
#include "lwip/pbuf.h"
#include "lwip/prot/ethernet.h"
/**
* @brief Returns the custom data stored in the supplied `netif` struct representing its vlan tag
*
* @param netif The lwIP network interface on which to send the packet
* @param p The packet to send. pbuf layer must be @ref PBUF_LINK.
* @param src The source MAC address to be copied into the ethernet header
* @param dst The destination MAC address to be copied into the ethernet header
* @param eth_type Ethernet type (@ref lwip_ieee_eth_type)
*
* @return Returns the vlan tag of the interface or -1.
*/
static inline int lwip_vlan_set(struct netif *netif, struct pbuf *p,
const struct eth_addr *src, const struct eth_addr *dst,
u16_t eth_type)
{
u16_t vlan_id = *((uint16_t *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MAX + 1));
if (0xFFF == vlan_id) {
return -1;
} else {
return vlan_id;
}
}
/**
* @brief Checks if the vlan tag in the frame matches the vlan tag of the interface.
*
* @param netif: struct netif on which the packet has been received
* @param eth_hdr: struct eth_hdr of the packet
* @param vlan_hdr: struct eth_vlan_hdr of the packet
*
* @return Returns true if the vlan tag in the frame matches the vlan tag of the interface, else returns false.
*/
static inline bool lwip_vlan_check(struct netif *netif, struct eth_hdr *eth_hdr, struct eth_vlan_hdr *vlan_hdr)
{
u16_t vlan_id = *((uint16_t *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MAX + 1));
if (vlan_id == VLAN_ID(vlan_hdr)) {
return true;
}
return false;
}