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sntp.h

sntp.h 1.2 KB
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  1. /*
    2. 

  2.  * (C) Masami Komiya <mkomiya@sonare.it> 2005
    3. 

  3.  *
    4. 

  4.  * SPDX-License-Identifier:	GPL-2.0+
    5. 

  5.  */
    6. 

  6. 

  7. #ifndef __SNTP_H__
    8. 

  8. #define __SNTP_H__
    9. 

  9. 

  10. #define NTP_SERVICE_PORT	123
    11. 

  11. #define SNTP_PACKET_LEN		48
    12. 

  12. 

  13. 

  14. /* Leap Indicator */
    15. 

  15. #define NTP_LI_NOLEAP		0x0
    16. 

  16. #define NTP_LI_61SECS		0x1
    17. 

  17. #define NTP_LI_59SECS		0x2
    18. 

  18. #define NTP_LI_ALARM		0x3
    19. 

  19. 

  20. /* Version */
    21. 

  21. 

  22. #define NTP_VERSION		4
    23. 

  23. 

  24. /* Mode */
    25. 

  25. #define NTP_MODE_RESERVED	0
    26. 

  26. #define NTP_MODE_SYMACTIVE	1	/* Symmetric Active */
    27. 

  27. #define NTP_MODE_SYMPASSIVE	2	/* Symmetric Passive */
    28. 

  28. #define NTP_MODE_CLIENT		3
    29. 

  29. #define NTP_MODE_SERVER		4
    30. 

  30. #define NTP_MODE_BROADCAST	5
    31. 

  31. #define NTP_MODE_NTPCTRL	6	/* Reserved for NTP control message */
    32. 

  32. #define NTP_MODE_PRIVATE	7	/* Reserved for private use */
    33. 

  33. 

  34. struct sntp_pkt_t {
    35. 

  35. #if __LITTLE_ENDIAN
    36. 

  36. 	uchar mode:3;
    37. 

  37. 	uchar vn:3;
    38. 

  38. 	uchar li:2;
    39. 

  39. #else
    40. 

  40. 	uchar li:2;
    41. 

  41. 	uchar vn:3;
    42. 

  42. 	uchar mode:3;
    43. 

  43. #endif
    44. 

  44. 	uchar stratum;
    45. 

  45. 	uchar poll;
    46. 

  46. 	uchar precision;
    47. 

  47. 	uint root_delay;
    48. 

  48. 	uint root_dispersion;
    49. 

  49. 	uint reference_id;
    50. 

  50. 	unsigned long long reference_timestamp;
    51. 

  51. 	unsigned long long originate_timestamp;
    52. 

  52. 	unsigned long long receive_timestamp;
    53. 

  53. 	unsigned long long transmit_timestamp;
    54. 

  54. };
    55. 

  55. 

  56. void sntp_start(void);	/* Begin SNTP */
    57. 

  57. 

  58. #endif /* __SNTP_H__ */
    59.