1 /* 2 * FreeRTOS V202212.00 3 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a copy of 6 * this software and associated documentation files (the "Software"), to deal in 7 * the Software without restriction, including without limitation the rights to 8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 9 * the Software, and to permit persons to whom the Software is furnished to do so, 10 * subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in all 13 * copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS 17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * https://www.FreeRTOS.org 23 * https://github.com/FreeRTOS 24 * 25 */ 26 27 /* */ 28 /* ntpClient.h */ 29 /* */ 30 31 #ifndef __NTPCLIENT_H__ 32 33 #define __NTPCLIENT_H__ 34 35 #define NTP_PORT 123 36 37 typedef uint32_t quint32; 38 typedef int32_t qint32; 39 typedef uint8_t quint8; 40 typedef int8_t qint8; 41 42 typedef union _SNtpFlags SNtpFlags; 43 44 #ifdef _MSC_VER 45 #define __attribute__( x ) 46 #endif 47 48 /** 49 * 64-bit NTP timestamp. 50 */ 51 struct __attribute__( ( __packed__ ) ) _SNtpTimestamp 52 { 53 /** Number of seconds passed since Jan 1 1900, in big-endian format. */ 54 quint32 seconds; 55 56 /** Fractional time part, in <tt>1/0xFFFFFFFF</tt>s of a second. */ 57 quint32 fraction; 58 }; 59 60 typedef struct _SNtpTimestamp SNtpTimestamp; 61 62 /** 63 * Mandatory part of an NTP packet 64 */ 65 struct SNtpPacket 66 { 67 /** Flags. */ 68 unsigned char flags; /* value 0xDB : mode 3 (client), version 3, leap indicator unknown 3 */ 69 70 /** Stratum of the clock. */ 71 quint8 stratum; /* value 0 : unspecified */ 72 73 /** Maximum interval between successive messages, in log2 seconds. Note that the value is signed. */ 74 qint8 poll; /* 10 means 1 << 10 = 1024 seconds */ 75 76 /** Precision of the clock, in log2 seconds. Note that the value is signed. */ 77 qint8 precision; /* 0xFA = 250 = 0.015625 seconds */ 78 79 /** Round trip time to the primary reference source, in NTP short format. */ 80 qint32 rootDelay; /* 0x5D2E = 23854 or (23854/65535)= 0.3640 sec */ 81 82 /** Nominal error relative to the primary reference source. */ 83 qint32 rootDispersion; /* 0x0008 CAC8 = 8.7912 seconds */ 84 85 /** Reference identifier (either a 4 character string or an IP address). */ 86 qint8 referenceID[ 4 ]; /* or just 0000 */ 87 88 /** The time at which the clock was last set or corrected. */ 89 SNtpTimestamp referenceTimestamp; /* Current time */ 90 91 /** The time at which the request departed the client for the server. */ 92 SNtpTimestamp originateTimestamp; /* Keep 0 */ 93 94 /** The time at which the request arrived at the server. */ 95 SNtpTimestamp receiveTimestamp; /* Keep 0 */ 96 97 /** The time at which the reply departed the server for client. */ 98 SNtpTimestamp transmitTimestamp; 99 }; 100 101 /* Add this number to get secs since 1-1-1900 */ 102 #define TIME1970 2208988800UL 103 104 #endif /* __NTPCLIENT_H__ */ 105