net/sntp.h

   1 /*
   2  * (C) Masami Komiya <mkomiya@sonare.it> 2005
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #ifndef __SNTP_H__
   8 #define __SNTP_H__
   9
  10 #define NTP_SERVICE_PORT        123
  11 #define SNTP_PACKET_LEN         48
  12
  13
  14 /* Leap Indicator */
  15 #define NTP_LI_NOLEAP           0x0
  16 #define NTP_LI_61SECS           0x1
  17 #define NTP_LI_59SECS           0x2
  18 #define NTP_LI_ALARM            0x3
  19
  20 /* Version */
  21
  22 #define NTP_VERSION             4
  23
  24 /* Mode */
  25 #define NTP_MODE_RESERVED       0
  26 #define NTP_MODE_SYMACTIVE      1       /* Symmetric Active */
  27 #define NTP_MODE_SYMPASSIVE     2       /* Symmetric Passive */
  28 #define NTP_MODE_CLIENT         3
  29 #define NTP_MODE_SERVER         4
  30 #define NTP_MODE_BROADCAST      5
  31 #define NTP_MODE_NTPCTRL        6       /* Reserved for NTP control message */
  32 #define NTP_MODE_PRIVATE        7       /* Reserved for private use */
  33
  34 struct sntp_pkt_t {
  35 #if __LITTLE_ENDIAN
  36         uchar mode:3;
  37         uchar vn:3;
  38         uchar li:2;
  39 #else
  40         uchar li:2;
  41         uchar vn:3;
  42         uchar mode:3;
  43 #endif
  44         uchar stratum;
  45         uchar poll;
  46         uchar precision;
  47         uint root_delay;
  48         uint root_dispersion;
  49         uint reference_id;
  50         unsigned long long reference_timestamp;
  51         unsigned long long originate_timestamp;
  52         unsigned long long receive_timestamp;
  53         unsigned long long transmit_timestamp;
  54 } __attribute__((packed));
  55
  56 void sntp_start(void);  /* Begin SNTP */
  57
  58 #endif /* __SNTP_H__ */