net/sntp.h

   1 /*
   2  * (C) Masami Komiya <mkomiya@sonare.it> 2005
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2, or (at
   7  * your option) any later version.
   8  */
   9
  10 #ifndef __SNTP_H__
  11 #define __SNTP_H__
  12
  13 #define NTP_SERVICE_PORT        123
  14 #define SNTP_PACKET_LEN         48
  15
  16
  17 /* Leap Indicator */
  18 #define NTP_LI_NOLEAP           0x0
  19 #define NTP_LI_61SECS           0x1
  20 #define NTP_LI_59SECS           0x2
  21 #define NTP_LI_ALARM            0x3
  22
  23 /* Version */
  24
  25 #define NTP_VERSION             4
  26
  27 /* Mode */
  28 #define NTP_MODE_RESERVED       0
  29 #define NTP_MODE_SYMACTIVE      1       /* Symmetric Active */
  30 #define NTP_MODE_SYMPASSIVE     2       /* Symmetric Passive */
  31 #define NTP_MODE_CLIENT         3
  32 #define NTP_MODE_SERVER         4
  33 #define NTP_MODE_BROADCAST      5
  34 #define NTP_MODE_NTPCTRL        6       /* Reserved for NTP control message */
  35 #define NTP_MODE_PRIVATE        7       /* Reserved for private use */
  36
  37 struct sntp_pkt_t {
  38 #if __LITTLE_ENDIAN
  39         uchar mode:3;
  40         uchar vn:3;
  41         uchar li:2;
  42 #else
  43         uchar li:2;
  44         uchar vn:3;
  45         uchar mode:3;
  46 #endif
  47         uchar stratum;
  48         uchar poll;
  49         uchar precision;
  50         uint root_delay;
  51         uint root_dispersion;
  52         uint reference_id;
  53         unsigned long long reference_timestamp;
  54         unsigned long long originate_timestamp;
  55         unsigned long long receive_timestamp;
  56         unsigned long long transmit_timestamp;
  57 };
  58
  59 extern void     SntpStart (void);       /* Begin SNTP */
  60
  61 #endif /* __SNTP_H__ */