mirror of
https://github.com/espressif/esp-idf.git
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74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2018-2022 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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#include "nvs.h"
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#include "lwip/dhcp.h"
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#include "lwip/netif.h"
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#include "netif/dhcp_state.h"
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#define DHCP_NAMESPACE "dhcp_state"
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#define IF_KEY_SIZE 3
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/*
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* As a NVS key, use string representation of the interface index number
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*/
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static inline char *gen_if_key(struct netif *netif, char *name)
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{
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lwip_itoa(name, IF_KEY_SIZE, netif->num);
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return name;
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}
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bool dhcp_ip_addr_restore(struct netif *netif)
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{
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nvs_handle_t nvs;
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char if_key[IF_KEY_SIZE];
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bool err = false;
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if (netif == NULL) {
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return false;
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}
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struct dhcp *dhcp = netif_dhcp_data(netif);
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uint32_t *ip_addr = &dhcp->offered_ip_addr.addr;
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if (nvs_open(DHCP_NAMESPACE, NVS_READONLY, &nvs) == ESP_OK) {
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if (nvs_get_u32(nvs, gen_if_key(netif, if_key), ip_addr) == ESP_OK) {
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err = true;
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}
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nvs_close(nvs);
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}
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return err;
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}
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void dhcp_ip_addr_store(struct netif *netif)
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{
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nvs_handle_t nvs;
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char if_key[IF_KEY_SIZE];
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if (netif == NULL) {
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return;
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}
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struct dhcp *dhcp = netif_dhcp_data(netif);
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uint32_t ip_addr = dhcp->offered_ip_addr.addr;
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if (nvs_open(DHCP_NAMESPACE, NVS_READWRITE, &nvs) == ESP_OK) {
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nvs_set_u32(nvs, gen_if_key(netif, if_key), ip_addr);
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nvs_commit(nvs);
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nvs_close(nvs);
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}
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}
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void dhcp_ip_addr_erase(struct netif *netif)
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{
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nvs_handle_t nvs;
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char if_key[IF_KEY_SIZE];
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if (netif == NULL) {
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return;
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}
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if (nvs_open(DHCP_NAMESPACE, NVS_READWRITE, &nvs) == ESP_OK) {
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nvs_erase_key(nvs, gen_if_key(netif, if_key));
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nvs_commit(nvs);
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nvs_close(nvs);
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}
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}
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