/* SPDX-License-Identifier: GPL-2.0+ */

  /*
   * (C) Masami Komiya <mkomiya@sonare.it> 2005

   */
  
  #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;

  } __attribute__((packed));

  void sntp_start(void);	/* Begin SNTP */

  
  #endif /* __SNTP_H__ */