ntp_packet.h File Reference

NTP packet definitions. More...

Detailed Description

NTP packet definitions.

Author

Luminița Lăzărescu clumi.nosp@m.nita.nosp@m..laza.nosp@m.resc.nosp@m.u@gma.nosp@m.il.c.nosp@m.om

Martine Lenders m.len.nosp@m.ders.nosp@m.@fu-b.nosp@m.erli.nosp@m.n.de

Definition in file ntp_packet.h.

#include <stdint.h>
#include "byteorder.h"

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Data Structures
struct	ntp_timestamp_t
	NTP timestamp. More...
struct	ntp_packet_t
	NTP packet. More...

Macros
#define	NTP_VERSION   (4U)
	NTP version.
#define	NTP_PORT   (123U)
	NTP port number.
#define	NTP_UNIX_OFFSET   (2208988800)
	Offset in seconds of NTP timestamp (seconds from 1990-01-01 00:00:00 UTC) to UNIX timestamp (seconds from 1970-01-01 00:00:00 UTC).

Enumerations
enum	ntp_mode_t {   NTP_MODE_RESERVED = 0 , NTP_MODE_SYM_ACTIVE , NTP_MODE_SYM_PASSIVE , NTP_MODE_CLIENT ,   NTP_MODE_SERVER , NTP_MODE_BROADCAST , NTP_MODE_PRIV }
	NTP modes. More...

Functions
static void	ntp_packet_set_li (ntp_packet_t *packet, uint8_t li)
	Set leap indicator in a NTP packet.
static void	ntp_packet_set_vn (ntp_packet_t *packet)
	Set version in a NTP packet.
static void	ntp_packet_set_mode (ntp_packet_t *packet, ntp_mode_t mode)
	Set mode in a NTP packet.
static uint8_t	ntp_packet_get_li (ntp_packet_t *packet)
	Get leap indicator from a NTP packet.
static uint8_t	ntp_packet_get_vn (ntp_packet_t *packet)
	Get version from a NTP packet.
static ntp_mode_t	ntp_packet_get_mode (ntp_packet_t *packet)
	Get mode from a NTP packet.
#define	NTP_PACKET_LI_POS   (6U)
	Bit positions and masks for ntp_packet_t::li_vn_mode.
#define	NTP_PACKET_LI_MASK   (0xc0)
	leap indicator mask
#define	NTP_PACKET_VN_POS   (3U)
	version position
#define	NTP_PACKET_VN_MASK   (0x38)
	version mask
#define	NTP_PACKET_MODE_MASK   (0x07)
	mode mask