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99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/*
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* FreeRTOS V202212.00
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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*/
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/* ntpClient.h */
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#ifndef __NTPCLIENT_H__
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#define __NTPCLIENT_H__
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#define NTP_PORT 123
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typedef uint32_t quint32;
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typedef int32_t qint32;
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typedef uint8_t quint8;
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typedef int8_t qint8;
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typedef union _SNtpFlags SNtpFlags;
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/**
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* 64-bit NTP timestamp.
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*/
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struct __attribute__( ( __packed__ ) ) _SNtpTimestamp
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{
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/** Number of seconds passed since Jan 1 1900, in big-endian format. */
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quint32 seconds;
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/** Fractional time part, in <tt>1/0xFFFFFFFF</tt>s of a second. */
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quint32 fraction;
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};
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typedef struct _SNtpTimestamp SNtpTimestamp;
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/**
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* Mandatory part of an NTP packet
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*/
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struct SNtpPacket
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{
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/** Flags. */
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unsigned char flags; /* value 0xDB : mode 3 (client), version 3, leap indicator unknown 3 */
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/** Stratum of the clock. */
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quint8 stratum; /* value 0 : unspecified */
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/** Maximum interval between successive messages, in log2 seconds. Note that the value is signed. */
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qint8 poll; /* 10 means 1 << 10 = 1024 seconds */
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/** Precision of the clock, in log2 seconds. Note that the value is signed. */
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qint8 precision; /* 0xFA = 250 = 0.015625 seconds */
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/** Round trip time to the primary reference source, in NTP short format. */
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qint32 rootDelay; /* 0x5D2E = 23854 or (23854/65535)= 0.3640 sec */
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/** Nominal error relative to the primary reference source. */
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qint32 rootDispersion; /* 0x0008 CAC8 = 8.7912 seconds */
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/** Reference identifier (either a 4 character string or an IP address). */
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qint8 referenceID[ 4 ]; /* or just 0000 */
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/** The time at which the clock was last set or corrected. */
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SNtpTimestamp referenceTimestamp; /* Current time */
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/** The time at which the request departed the client for the server. */
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SNtpTimestamp originateTimestamp; /* Keep 0 */
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/** The time at which the request arrived at the server. */
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SNtpTimestamp receiveTimestamp; /* Keep 0 */
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/** The time at which the reply departed the server for client. */
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SNtpTimestamp transmitTimestamp;
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};
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/* Add this number to get secs since 1-1-1900 */
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#define TIME1970 2208988800UL
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#endif // __NTPCLIENT_H__
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