79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdio.h>
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#include <assert.h>
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#include "nvs.h"
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#include "lwip/opt.h"
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#include "lwip/dhcp.h"
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#include "lwip/netif.h"
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#include "esp_interface.h"
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#include "esp_netif.h"
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#include "esp_netif_net_stack.h"
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#include "netif/dhcp_state.h"
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#define DHCP_NAMESPACE "dhcp_state"
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// DHCP_Client has to be enabled for this netif
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#define VALID_NETIF_ID(netif) (ESP_NETIF_DHCP_CLIENT&esp_netif_get_flags(netif))
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bool dhcp_ip_addr_restore(void *netif)
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{
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nvs_handle_t nvs;
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bool err = false;
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struct netif *net = (struct netif *)netif;
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struct dhcp *dhcp = netif_dhcp_data(net);
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esp_netif_t *esp_netif = esp_netif_get_handle_from_netif_impl(netif);
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if(VALID_NETIF_ID(esp_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, esp_netif_get_ifkey(esp_netif), 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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}
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return err;
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}
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void dhcp_ip_addr_store(void *netif)
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{
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nvs_handle_t nvs;
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struct netif *net = (struct netif *)netif;
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struct dhcp *dhcp = netif_dhcp_data(net);
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uint32_t ip_addr = dhcp->offered_ip_addr.addr;
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esp_netif_t *esp_netif = esp_netif_get_handle_from_netif_impl(netif);
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if(VALID_NETIF_ID(esp_netif)) {
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if (nvs_open(DHCP_NAMESPACE, NVS_READWRITE, &nvs) == ESP_OK) {
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nvs_set_u32(nvs,esp_netif_get_ifkey(esp_netif), 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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}
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void dhcp_ip_addr_erase(void *esp_netif)
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{
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nvs_handle_t nvs;
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if(VALID_NETIF_ID(esp_netif)) {
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if (nvs_open(DHCP_NAMESPACE, NVS_READWRITE, &nvs) == ESP_OK) {
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nvs_erase_key(nvs, esp_netif_get_ifkey(esp_netif));
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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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} |