| // | |
| // ntpClient.h | |
| // | |
| #ifndef __NTPCLIENT_H__ | |
| #define __NTPCLIENT_H__ | |
| #define NTP_PORT 123 | |
| typedef uint32_t quint32; | |
| typedef int32_t qint32; | |
| typedef uint8_t quint8; | |
| typedef int8_t qint8; | |
| typedef union _SNtpFlags SNtpFlags; | |
| /** | |
| * 64-bit NTP timestamp. | |
| */ | |
| struct __attribute__ ((__packed__)) _SNtpTimestamp { | |
| /** Number of seconds passed since Jan 1 1900, in big-endian format. */ | |
| quint32 seconds; | |
| /** Fractional time part, in <tt>1/0xFFFFFFFF</tt>s of a second. */ | |
| quint32 fraction; | |
| }; | |
| typedef struct _SNtpTimestamp SNtpTimestamp; | |
| /** | |
| * Mandatory part of an NTP packet | |
| */ | |
| struct SNtpPacket { | |
| /** Flags. */ | |
| unsigned char flags; // value 0xDB : mode 3 (client), version 3, leap indicator unknown 3 | |
| /** Stratum of the clock. */ | |
| quint8 stratum; // value 0 : unspecified | |
| /** Maximum interval between successive messages, in log2 seconds. Note that the value is signed. */ | |
| qint8 poll; // 10 means 1 << 10 = 1024 seconds | |
| /** Precision of the clock, in log2 seconds. Note that the value is signed. */ | |
| qint8 precision; // 0xFA = 250 = 0.015625 seconds | |
| /** Round trip time to the primary reference source, in NTP short format. */ | |
| qint32 rootDelay; // 0x5D2E = 23854 or (23854/65535)= 0.3640 sec | |
| /** Nominal error relative to the primary reference source. */ | |
| qint32 rootDispersion; // 0x0008 CAC8 = 8.7912 seconds | |
| /** Reference identifier (either a 4 character string or an IP address). */ | |
| qint8 referenceID[4]; // or just 0000 | |
| /** The time at which the clock was last set or corrected. */ | |
| SNtpTimestamp referenceTimestamp; // Current time | |
| /** The time at which the request departed the client for the server. */ | |
| SNtpTimestamp originateTimestamp; // Keep 0 | |
| /** The time at which the request arrived at the server. */ | |
| SNtpTimestamp receiveTimestamp; // Keep 0 | |
| /** The time at which the reply departed the server for client. */ | |
| SNtpTimestamp transmitTimestamp; | |
| }; | |
| /* Add this number to get secs since 1-1-1900 */ | |
| #define TIME1970 2208988800UL | |
| #endif // __NTPCLIENT_H__ |