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