58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Masami Komiya <mkomiya@sonare.it> 2005
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*/
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#ifndef __SNTP_H__
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#define __SNTP_H__
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#define NTP_SERVICE_PORT 123
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#define SNTP_PACKET_LEN 48
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/* Leap Indicator */
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#define NTP_LI_NOLEAP 0x0
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#define NTP_LI_61SECS 0x1
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#define NTP_LI_59SECS 0x2
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#define NTP_LI_ALARM 0x3
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/* Version */
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#define NTP_VERSION 4
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/* Mode */
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#define NTP_MODE_RESERVED 0
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#define NTP_MODE_SYMACTIVE 1 /* Symmetric Active */
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#define NTP_MODE_SYMPASSIVE 2 /* Symmetric Passive */
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#define NTP_MODE_CLIENT 3
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#define NTP_MODE_SERVER 4
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#define NTP_MODE_BROADCAST 5
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#define NTP_MODE_NTPCTRL 6 /* Reserved for NTP control message */
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#define NTP_MODE_PRIVATE 7 /* Reserved for private use */
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struct sntp_pkt_t {
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#if __LITTLE_ENDIAN
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uchar mode:3;
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uchar vn:3;
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uchar li:2;
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#else
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uchar li:2;
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uchar vn:3;
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uchar mode:3;
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#endif
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uchar stratum;
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uchar poll;
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uchar precision;
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uint root_delay;
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uint root_dispersion;
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uint reference_id;
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unsigned long long reference_timestamp;
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unsigned long long originate_timestamp;
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unsigned long long receive_timestamp;
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unsigned long long transmit_timestamp;
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} __attribute__((packed));
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void sntp_start(void); /* Begin SNTP */
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#endif /* __SNTP_H__ */
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