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sntp.h

sntp.h 1.4 KB
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  1. /*
    2. 

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

  3.  *
    4. 

  4.  * This program is free software; you can redistribute it and/or
    5. 

  5.  * modify it under the terms of the GNU General Public License as
    6. 

  6.  * published by the Free Software Foundation; either version 2, or (at
    7. 

  7.  * your option) any later version.
    8. 

  8.  */
    9. 

  9. 

  10. #ifndef __SNTP_H__
    11. 

  11. #define __SNTP_H__
    12. 

  12. 

  13. #define NTP_SERVICE_PORT	123
    14. 

  14. #define SNTP_PACKET_LEN		48
    15. 

  15. 

  16. 

  17. /* Leap Indicator */
    18. 

  18. #define NTP_LI_NOLEAP		0x0
    19. 

  19. #define NTP_LI_61SECS		0x1
    20. 

  20. #define NTP_LI_59SECS		0x2
    21. 

  21. #define NTP_LI_ALARM		0x3
    22. 

  22. 

  23. /* Version */
    24. 

  24. 

  25. #define NTP_VERSION		4
    26. 

  26. 

  27. /* Mode */
    28. 

  28. #define NTP_MODE_RESERVED	0
    29. 

  29. #define NTP_MODE_SYMACTIVE	1	/* Symmetric Active */
    30. 

  30. #define NTP_MODE_SYMPASSIVE	2	/* Symmetric Passive */
    31. 

  31. #define NTP_MODE_CLIENT		3
    32. 

  32. #define NTP_MODE_SERVER		4
    33. 

  33. #define NTP_MODE_BROADCAST	5
    34. 

  34. #define NTP_MODE_NTPCTRL	6	/* Reserved for NTP control message */
    35. 

  35. #define NTP_MODE_PRIVATE	7	/* Reserved for private use */
    36. 

  36. 

  37. struct sntp_pkt_t {
    38. 

  38. #if __LITTLE_ENDIAN
    39. 

  39. 	uchar mode:3;
    40. 

  40. 	uchar vn:3;
    41. 

  41. 	uchar li:2;
    42. 

  42. #else
    43. 

  43. 	uchar li:2;
    44. 

  44. 	uchar vn:3;
    45. 

  45. 	uchar mode:3;
    46. 

  46. #endif
    47. 

  47. 	uchar stratum;
    48. 

  48. 	uchar poll;
    49. 

  49. 	uchar precision;
    50. 

  50. 	uint root_delay;
    51. 

  51. 	uint root_dispersion;
    52. 

  52. 	uint reference_id;
    53. 

  53. 	unsigned long long reference_timestamp;
    54. 

  54. 	unsigned long long originate_timestamp;
    55. 

  55. 	unsigned long long receive_timestamp;
    56. 

  56. 	unsigned long long transmit_timestamp;
    57. 

  57. };
    58. 

  58. 

  59. extern void SntpStart(void);	/* Begin SNTP */
    60. 

  60. 

  61. #endif /* __SNTP_H__ */
    62.