wolfssl-w32/IDE/Espressif/ESP-IDF/examples/wolfssl_test/main/time_helper.c

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/* time_helper.c
*
* Copyright (C) 2006-2023 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#include <string.h>
#include <lwip/apps/sntp.h>
#include "sdkconfig.h"
#include "esp_log.h"
#include "time_helper.h"
const static char* TAG = "Time Helper";
#define TIME_ZONE "PST-8"
/* NELEMS(x) number of elements
* To determine the number of elements in the array, we can divide the total size of
* the array by the size of the array element
* See https://stackoverflow.com/questions/37538/how-do-i-determine-the-size-of-my-array-in-c
**/
#define NELEMS(x) ( (int)(sizeof(x) / sizeof((x)[0])) )
#define NTP_SERVER_LIST ( (char*[]) { \
"pool.ntp.org", \
"time.nist.gov", \
"utcnist.colorado.edu" \
} \
)
/* #define NTP_SERVER_COUNT using NELEMS:
*
* (int)(sizeof(NTP_SERVER_LIST) / sizeof(NTP_SERVER_LIST[0]))
*/
#define NTP_SERVER_COUNT NELEMS(NTP_SERVER_LIST)
char* ntpServerList[NTP_SERVER_COUNT] = NTP_SERVER_LIST;
/* our NTP server list is global info */
extern char* ntpServerList[NTP_SERVER_COUNT];
int set_time(void)
{
/* we'll also return a result code of zero */
int res = 0;
int i = 0; /* counter for time servers */
time_t interim_time;
/* ideally, we'd like to set time from network,
* but let's set a default time, just in case */
struct tm timeinfo = {
.tm_year = 2022 - 1900,
.tm_mon = 11,
.tm_mday = 15,
.tm_hour = 3,
.tm_min = 25,
.tm_sec = 0
};
struct timeval now;
#ifndef NTP_SERVER_COUNT
#define NTP_SERVER_COUNT 0
char* ntpServerList[NTP_SERVER_COUNT];
#endif /* not defined: NTP_SERVER_COUNT */
#ifndef TIME_ZONE
#define TIME_ZONE "PST-8"
#endif /* not defined: TIME_ZONE */
/* set interim static time */
interim_time = mktime(&timeinfo);
now = (struct timeval){ .tv_sec = interim_time };
settimeofday(&now, NULL);
/* set timezone */
setenv("TZ", TIME_ZONE, 1);
tzset();
if (NTP_SERVER_COUNT) {
/* next, let's setup NTP time servers
*
* see https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/system_time.html#sntp-time-synchronization
*/
sntp_setoperatingmode(SNTP_OPMODE_POLL);
ESP_LOGI(TAG, "sntp_setservername:");
for (i = 0; i < NTP_SERVER_COUNT; i++) {
const char* thisServer = ntpServerList[i];
if (strncmp(thisServer, "\x00", 1) == 0) {
/* just in case we run out of NTP servers */
break;
}
ESP_LOGI(TAG, "%s", thisServer);
sntp_setservername(i, thisServer);
}
sntp_init();
ESP_LOGI(TAG, "sntp_init done.");
}
else {
ESP_LOGI(TAG, "No sntp time servers found.");
}
return res;
}