87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
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// 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 "tcpip_adapter.h"
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#include "netif/dhcp_state.h"
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#define DHCP_NAMESPACE "dhcp_state"
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#define VALID_NETIF_ID(id) ((id < ESP_IF_MAX) && (id != ESP_IF_WIFI_AP))
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static uint32_t restored_ip_addr[TCPIP_ADAPTER_IF_MAX];
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static const char *interface_key[] = {"IF_STA", "IF_AP", "IF_ETH"};
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_Static_assert(sizeof(interface_key) / sizeof(char*) == TCPIP_ADAPTER_IF_MAX,
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"Number interface keys differs from number of interfaces");
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bool dhcp_ip_addr_restore(void *netif)
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{
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nvs_handle 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_interface_t netif_id = tcpip_adapter_get_esp_if(net);
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if(VALID_NETIF_ID(netif_id)) {
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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, interface_key[netif_id], ip_addr) == ESP_OK) {
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restored_ip_addr[netif_id] = *ip_addr;
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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 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_interface_t netif_id = tcpip_adapter_get_esp_if(net);
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if(VALID_NETIF_ID(netif_id)) {
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if (restored_ip_addr[netif_id] != ip_addr) {
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if (nvs_open(DHCP_NAMESPACE, NVS_READWRITE, &nvs) == ESP_OK) {
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nvs_set_u32(nvs, interface_key[netif_id], 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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}
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void dhcp_ip_addr_erase(void *netif)
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{
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nvs_handle nvs;
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struct netif *net = (struct netif *)netif;
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esp_interface_t netif_id = tcpip_adapter_get_esp_if(net);
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if(VALID_NETIF_ID(netif_id)) {
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if (nvs_open(DHCP_NAMESPACE, NVS_READWRITE, &nvs) == ESP_OK) {
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nvs_erase_key(nvs, interface_key[netif_id]);
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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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