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71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/*
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* Copyright (C) 2016 Luminița Lăzărescu <cluminita.lazarescu@gmail.com>
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* Copyright (C) 2017 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup net_sntp Simple Network Time Protocol
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* @ingroup net
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* @brief Simple Network Time Protocol (SNTP) implementation
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* @{
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*
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* @file
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* @brief SNTP definitions
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*
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* @author Luminița Lăzărescu <cluminita.lazarescu@gmail.com>
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* @author Martine Lenders <m.lenders@fu-berlin.de>
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*/
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#ifndef NET_SNTP_H
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#define NET_SNTP_H
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#include <stdint.h>
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#include <time.h>
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#include "net/ntp_packet.h"
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#include "net/sock/udp.h"
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#include "xtimer.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Synchronize with time server
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*
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* @param[in] server The time server
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* @param[in] timeout Timeout for the server response in microseconds
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*
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* @return 0 on success
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* @return Negative number on error
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*/
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int sntp_sync(sock_udp_ep_t *server, uint32_t timeout);
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/**
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* @brief Get real time offset from system time as returned by @ref xtimer_now64()
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*
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* @return Real time offset in microseconds relative to 1900-01-01 00:00 UTC
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*/
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int64_t sntp_get_offset(void);
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/**
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* @brief Get time in microseconds from 1970-01-01 00:00:00 UTC.
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*
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* @return Time in microseconds from 1970-01-01 00:00:00 UTC
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*/
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static inline uint64_t sntp_get_unix_usec(void)
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{
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return (uint64_t)(sntp_get_offset() - (NTP_UNIX_OFFSET * US_PER_SEC) + xtimer_now_usec64());
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* NET_SNTP_H */
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/** @} */
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