sntp_8h_source.html

/*

 * Copyright (C) 2016 Luminița Lăzărescu <cluminita.lazarescu@gmail.com>

 * Copyright (C) 2017 Freie Universität Berlin

 *

 * This file is subject to the terms and conditions of the GNU Lesser

 * General Public License v2.1. See the file LICENSE in the top level

 * directory for more details.

 */


#ifndef NET_SNTP_H

#define NET_SNTP_H


#include <stdint.h>

#include <time.h>


#include "net/ntp_packet.h"

#include "net/sock/udp.h"

#include "xtimer.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) + xtimer_now_usec64());

}


#ifdef __cplusplus

}

#endif


#endif /* NET_SNTP_H */

NTP_UNIX_OFFSET
#define NTP_UNIX_OFFSET
Offset in seconds of NTP timestamp (seconds from 1990-01-01 00:00:00 UTC) to UNIX timestamp (seconds ...
Definition ntp_packet.h:53

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 xtimer_now64()

US_PER_SEC
#define US_PER_SEC
The number of microseconds per second.
Definition time_units.h:85

xtimer_now_usec64
static uint64_t xtimer_now_usec64(void)
get the current system time in microseconds since start

ntp_packet.h
NTP packet definitions.

udp.h
UDP sock definitions.

_sock_tl_ep
Common IP-based transport layer end point.
Definition sock.h:215

xtimer.h
xtimer interface definitions