sntp_8h_source.html

/*

 * SPDX-FileCopyrightText: 2016 Luminița Lăzărescu <cluminita.lazarescu@gmail.com>

 * SPDX-FileCopyrightText: 2017 Freie Universität Berlin

 * SPDX-License-Identifier: LGPL-2.1-only

 */


#pragma once


#include <stdint.h>

#include <time.h>


#include "net/ntp_packet.h"

#include "net/sock/udp.h"

#include "ztimer64.h"


#ifdef __cplusplus

extern "C" {

#endif


int sntp_sync(sock_udp_ep_t *server, uint32_t timeout);


int64_t sntp_get_offset(void);


static inline uint64_t sntp_get_unix_usec(void)

{

    return (uint64_t)(sntp_get_offset() - (NTP_UNIX_OFFSET * US_PER_SEC) + \

                      ztimer64_now(ZTIMER64_USEC));

}


#ifdef __cplusplus

}

#endif


NTP_UNIX_OFFSET
#define NTP_UNIX_OFFSET
Offset in seconds of NTP timestamp (seconds from 1900-01-01 00:00:00 UTC) to UNIX timestamp (seconds ...
Definition ntp_packet.h:51

sntp_get_unix_usec
static uint64_t sntp_get_unix_usec(void)
Get time in microseconds from 1970-01-01 00:00:00 UTC.
Definition sntp.h:60

sntp_sync
int sntp_sync(sock_udp_ep_t *server, uint32_t timeout)
Synchronize with time server.

sntp_get_offset
int64_t sntp_get_offset(void)
Get real time offset from system time as returned by ztimer64_now()

sock_udp_ep_t
struct _sock_tl_ep sock_udp_ep_t
An end point for a UDP sock object.
Definition udp.h:292

US_PER_SEC
#define US_PER_SEC
The number of microseconds per second.
Definition time_units.h:81

ztimer64_now
uint64_t ztimer64_now(ztimer64_clock_t *clock)
Get the current time from a clock.

ZTIMER64_USEC
ztimer64_clock_t *const ZTIMER64_USEC
Default ztimer microsecond clock.

ntp_packet.h
NTP packet definitions.

udp.h
UDP sock definitions.

ztimer64.h
ztimer 64bit API