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feat(lwip): softap can get sta ip from arp table

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wangtao@espressif.com
2026-05-26 11:18:59 +08:00
parent bbd612e9f7
commit bdfc11bbad
5 changed files with 78 additions and 8 deletions
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components/esp_netif/include/esp_netif.h
+15 -1
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2019-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2019-2026 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -692,6 +692,20 @@ esp_err_t esp_netif_dhcps_stop(esp_netif_t *esp_netif);
*/
esp_err_t esp_netif_dhcps_get_clients_by_mac(esp_netif_t *esp_netif, int num, esp_netif_pair_mac_ip_t *mac_ip_pair);
/**
* @brief Populate IP addresses of client from the lwIP ARP cache on this interface
*
* Walks the ARP table and fills in ip when the Ethernet address matches and the entry belongs to esp_netif.
*
* @param[in] esp_netif Handle to esp-netif instance
* @param[in,out] mac_ip_pair MAC/IP pair to fill in the IP
* @return
* - ESP_OK on success (including when nothing was found in ARP)
* - ESP_ERR_ESP_NETIF_INVALID_PARAMS on invalid params
* - ESP_ERR_NOT_SUPPORTED if ARP is disabled in lwIP
*/
esp_err_t esp_netif_arp_get_client_by_mac(esp_netif_t *esp_netif, esp_netif_pair_mac_ip_t *mac_ip_pair);
/**
* @}
*/
components/esp_netif/lwip/esp_netif_lwip.c
+46
View File
@@ -1918,6 +1918,52 @@ esp_err_t esp_netif_dhcps_get_clients_by_mac(esp_netif_t *esp_netif, int num, es
#endif // CONFIG_LWIP_DHCPS
}
#if CONFIG_LWIP_IPV4 && LWIP_ARP
static esp_err_t esp_netif_arp_get_client_by_mac_api(esp_netif_api_msg_t *msg)
{
esp_netif_t *esp_netif = msg->esp_netif;
esp_netif_pair_mac_ip_t *mac_ip_pair = msg->data;
struct netif *lwip_netif = esp_netif ? esp_netif->lwip_netif : NULL;
if (lwip_netif == NULL || mac_ip_pair == NULL) {
return ESP_ERR_ESP_NETIF_INVALID_PARAMS;
}
mac_ip_pair->ip.addr = 0;
for (size_t i = 0; i < ARP_TABLE_SIZE; i++) {
ip4_addr_t *ip_ptr = NULL;
struct netif *nif = NULL;
struct eth_addr *eth_ptr = NULL;
if (!etharp_get_entry(i, &ip_ptr, &nif, &eth_ptr)) {
continue;
}
if (nif != lwip_netif) {
continue;
}
if (memcmp(eth_ptr->addr, mac_ip_pair->mac, ETH_HWADDR_LEN) != 0) {
continue;
}
mac_ip_pair->ip.addr = ip_ptr->addr;
break;
}
return ESP_OK;
}
#endif /* CONFIG_LWIP_IPV4 && LWIP_ARP */
esp_err_t esp_netif_arp_get_client_by_mac(esp_netif_t *esp_netif, esp_netif_pair_mac_ip_t *mac_ip_pair)
{
#if CONFIG_LWIP_IPV4 && LWIP_ARP
if (esp_netif == NULL || mac_ip_pair == NULL) {
return ESP_ERR_ESP_NETIF_INVALID_PARAMS;
}
return esp_netif_lwip_ipc_call(esp_netif_arp_get_client_by_mac_api, esp_netif, (void *)mac_ip_pair);
#else
return ESP_ERR_NOT_SUPPORTED;
#endif /* CONFIG_LWIP_IPV4 && LWIP_ARP */
}
static esp_err_t esp_netif_set_dns_info_api(esp_netif_api_msg_t *msg)
{
esp_netif_t *esp_netif = msg->esp_netif;