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#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_log.h"
#include "esp_check.h"
#include "utils.h"
#include "net.h"
static const char *TAG = "net";
#if !CONFIG_IDF_TARGET_LINUX
#include "esp_wifi.h"
#include "esp_mac.h"
#include "esp_event.h"
#include "esp_netif_net_stack.h"
#include "esp_netif.h"
#include "nvs_flash.h"
#include "lwip/inet.h"
#include "lwip/netdb.h"
#include "lwip/sockets.h"
#if IP_NAPT
#include "lwip/lwip_napt.h"
#endif
#include "lwip/err.h"
#include "lwip/sys.h"
#include "mdns.h"
/* The event group allows multiple bits for each event, but we only care about two events:
* - we are connected to the AP with an IP
* - we failed to connect after the maximum amount of retries */
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1
static const char *TAG_AP = "net SoftAP";
static const char *TAG_STA = "net Sta";
/* FreeRTOS event group to signal when we are connected/disconnected */
static EventGroupHandle_t s_wifi_event_group;
static void wifi_event_handler(void *arg, esp_event_base_t event_base,
int32_t event_id, void *event_data)
{
static int s_retry_num;
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START)
{
esp_wifi_connect();
}
else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_CONNECTED)
{
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
}
else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED)
{
if (s_retry_num < 5) {
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
} else {
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_APSTA));
}
ESP_LOGI(TAG,"connect to the AP fail");
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
s_retry_num = 0;
xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
}
ESP_LOGI(TAG_STA, "%s, %li", event_base, event_id);
}
static void setup_mdns()
{
ESP_ERROR_CHECK(mdns_init());
char* id;
asprintf(
&id,
"shelly%s-"MACFMT"",
CONFIG_SHELLSP_MODEL, MAC2STR(get_wifi_mac())
);
ESP_LOGI(TAG, "mDNS hostname: %s", id);
mdns_hostname_set(id);
mdns_instance_name_set(id);
mdns_txt_item_t serviceTxtData[6] = {
{"discoverable", "true"},
{"fw_id", "20230913-112003/v1.14.0-gcb84623"},
{"fw_version", "1.0"},
{"app", "switch1"},
{"arch", "esp8266"},
{"id", id},
};
mdns_service_add(NULL, "_http", "_tcp", 80, serviceTxtData, 6);
}
static bool wifi_init_softap(void)
{
esp_netif_t* netif = esp_netif_create_default_wifi_ap();
wifi_config_t wifi_ap_config = {
.ap = {
.channel = 1,
.authmode = WIFI_AUTH_OPEN,
.max_connection = 5,
.pmf_cfg = {
.required = false,
},
},
};
char* ssid = (char*)wifi_ap_config.ap.ssid;
snprintf(
ssid, 32,
"shelly%s-"MACFMT"",
CONFIG_SHELLSP_MODEL, MAC2STR(get_wifi_mac())
);
wifi_ap_config.ap.ssid_len = strlen(ssid);
ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &wifi_ap_config));
// Stop DHCP so we can configure it
ESP_ERROR_CHECK(esp_netif_dhcps_stop(netif));
// Setting a static IP for setup
// Device is expected to be available at 192.168.33.1
esp_netif_ip_info_t ip = {0};
ip.ip.addr = ipaddr_addr(CONFIG_SHELLSP_AP_IP_ADDR);
ip.netmask.addr = ipaddr_addr(CONFIG_SHELLSP_AP_IP_NETMASK);
ip.gw.addr = ipaddr_addr(CONFIG_SHELLSP_AP_IP_ADDR);
ESP_ERROR_CHECK(esp_netif_set_ip_info(netif, &ip));
// Turn the DHCP server back on
ESP_ERROR_CHECK(esp_netif_dhcps_start(netif));
ESP_LOGI(TAG_AP, "wifi_init_softap finished. SSID:%s", wifi_ap_config.ap.ssid);
return true;
}
static bool wifi_init_sta(void)
{
wifi_config_t wifi_cfg;
ESP_RETURN_ON_FALSE(esp_wifi_get_config(WIFI_IF_STA, &wifi_cfg) == ESP_OK, false, TAG_STA, "failed to get wifi sta config");
ESP_LOGI(TAG_STA, "BLA BLA SSID IS: %s", (char*)wifi_cfg.sta.ssid);
ESP_LOGI(TAG_STA, "BLA BLA BSSID IS: %i " MACSTR, wifi_cfg.sta.bssid_set, MAC2STR(wifi_cfg.sta.bssid));
if (!strlen((const char*)wifi_cfg.sta.ssid))
return false;
esp_netif_create_default_wifi_sta();
return true;
}
esp_err_t net_connect(void)
{
/* Initialize event group */
s_wifi_event_group = xEventGroupCreate();
/* Register Event handler */
ESP_ERROR_CHECK(
esp_event_handler_instance_register(
WIFI_EVENT,
ESP_EVENT_ANY_ID,
&wifi_event_handler,
NULL,
NULL
)
);
ESP_ERROR_CHECK(
esp_event_handler_instance_register(
IP_EVENT,
IP_EVENT_STA_GOT_IP,
&wifi_event_handler,
NULL,
NULL
)
);
/*Initialize WiFi */
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_FLASH));
// Set APSTA ahead of time so we can check data
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_APSTA));
if (!wifi_init_softap())
{
ESP_LOGE(TAG, "Failed to initialize SoftAP");
}
bool s = wifi_init_sta();
if (s)
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
ESP_ERROR_CHECK(esp_wifi_start());
setup_mdns();
if (!s)
{
ESP_LOGI(TAG, "Invalid STA config, not waiting for STA");
return ESP_OK;
}
/*
* Wait until either the connection is established (WIFI_CONNECTED_BIT) or
* connection failed for the maximum number of re-tries (WIFI_FAIL_BIT).
* The bits are set by event_handler() (see above)
*/
EventBits_t bits = xEventGroupWaitBits(
s_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY
);
/* xEventGroupWaitBits() returns the bits before the call returned,
* hence we can test which event actually happened. */
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "Connected to station, setting STA mode");
} else if (bits & WIFI_FAIL_BIT) {
ESP_LOGI(TAG, "Failed to connect to station");
} else {
ESP_LOGE(TAG, "UNEXPECTED EVENT");
return ESP_FAIL;
}
return ESP_OK;
}
#else /* CONFIG_IDF_TARGET_LINUX */
esp_err_t net_connect(void) {
ESP_LOGI(TAG, "STUB net_connect()");
return ESP_OK;
}
#endif /* !CONFIG_IDF_TARGET_LINUX */
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