sntp.h
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1 /*
2  * SPDX-FileCopyrightText: 2016 Luminița Lăzărescu <cluminita.lazarescu@gmail.com>
3  * SPDX-FileCopyrightText: 2017 Freie Universität Berlin
4  * SPDX-License-Identifier: LGPL-2.1-only
5  */
6 
7 #pragma once
8 
26 #include <stdint.h>
27 #include <time.h>
28 
29 #include "net/ntp_packet.h"
30 #include "net/sock/udp.h"
31 #include "ztimer64.h"
32 
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36 
46 int sntp_sync(sock_udp_ep_t *server, uint32_t timeout);
47 
53 int64_t sntp_get_offset(void);
54 
60 static inline uint64_t sntp_get_unix_usec(void)
61 {
62  return (uint64_t)(sntp_get_offset() - (NTP_UNIX_OFFSET * US_PER_SEC) + \
63  ztimer64_now(ZTIMER64_USEC));
64 }
65 
66 #ifdef __cplusplus
67 }
68 #endif
69 
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()
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.
_sock_tl_ep
Common IP-based transport layer end point.
Definition: sock.h:211
ztimer64.h
ztimer 64bit API