SNTP

Simple Network Time Protocol API . More...

Data Structures
struct	sntp_time
	Time as returned by SNTP API, fractional seconds since 1 Jan 1970. More...
struct	sntp_ctx
	SNTP context. More...

Functions
int	sntp_init (struct sntp_ctx *ctx, struct sockaddr *addr, socklen_t addr_len)
	Initialize SNTP context.
int	sntp_query (struct sntp_ctx *ctx, uint32_t timeout, struct sntp_time *ts)
	Perform SNTP query.
int	sntp_recv_response (struct sntp_ctx *ctx, uint32_t timeout, struct sntp_time *ts)
	Attempt to receive an SNTP response after issuing a query.
void	sntp_close (struct sntp_ctx *ctx)
	Release SNTP context.
int	sntp_init_async (struct sntp_ctx *ctx, struct sockaddr *addr, socklen_t addr_len, const struct net_socket_service_desc *service)
	Initialise SNTP context for async operation.
int	sntp_send_async (struct sntp_ctx *ctx)
	Send the SNTP query.
int	sntp_read_async (struct net_socket_service_event *event, struct sntp_time *ts)
	Read the result of the SNTP query.
void	sntp_close_async (const struct net_socket_service_desc *service)
	Release SNTP context.
int	sntp_simple (const char *server, uint32_t timeout, struct sntp_time *ts)
	Convenience function to query SNTP in one-shot fashion.
int	sntp_simple_addr (struct sockaddr *addr, socklen_t addr_len, uint32_t timeout, struct sntp_time *ts)
	Convenience function to query SNTP in one-shot fashion using a pre-initialized address struct.

Detailed Description

Simple Network Time Protocol API .

Since

1.10

Version

0.8.0

Function Documentation

sntp_close()

void sntp_close

(

struct sntp_ctx *

ctx

)

#include <zephyr/net/sntp.h>

Release SNTP context.

Parameters

ctx	Address of sntp context.

sntp_close_async()

void sntp_close_async

(

const struct net_socket_service_desc *

service

)

#include <zephyr/net/sntp.h>

Release SNTP context.

Parameters

service

Socket service defined by NET_SOCKET_SERVICE_SYNC_DEFINE

sntp_init()

int sntp_init	(	struct sntp_ctx *	ctx,
		struct sockaddr *	addr,
		socklen_t	addr_len )

#include <zephyr/net/sntp.h>

Initialize SNTP context.

Parameters

ctx	Address of sntp context.
addr	IP address of NTP/SNTP server.
addr_len	IP address length of NTP/SNTP server.

Returns

0 if ok, <0 if error.

sntp_init_async()

int sntp_init_async	(	struct sntp_ctx *	ctx,
		struct sockaddr *	addr,
		socklen_t	addr_len,
		const struct net_socket_service_desc *	service )

#include <zephyr/net/sntp.h>

Initialise SNTP context for async operation.

Asynchronous operation is powered by CONFIG_NET_SOCKETS_SERVICE.

Parameters

ctx	Address of sntp context.
addr	IP address of NTP/SNTP server.
addr_len	IP address length of NTP/SNTP server.
service	Socket service defined by NET_SOCKET_SERVICE_SYNC_DEFINE

Returns

0 if ok, <0 if error.

sntp_query()

int sntp_query	(	struct sntp_ctx *	ctx,
		uint32_t	timeout,
		struct sntp_time *	ts )

#include <zephyr/net/sntp.h>

Perform SNTP query.

Parameters

ctx	Address of sntp context.
timeout	Timeout of waiting for sntp response (in milliseconds).
ts	Timestamp including integer and fractional seconds since 1 Jan 1970 (output).

Returns

0 if ok, <0 if error (-ETIMEDOUT if timeout).

sntp_read_async()

int sntp_read_async	(	struct net_socket_service_event *	event,
		struct sntp_time *	ts )

#include <zephyr/net/sntp.h>

Read the result of the SNTP query.

Must be called from the callback attached to the net_socket_service_desc context.

Parameters

event	Event pointer extracted from the service work callback
ts	Timestamp including integer and fractional seconds since 1 Jan 1970 (output).

Returns

0 if ok, <0 if error

sntp_recv_response()

int sntp_recv_response	(	struct sntp_ctx *	ctx,
		uint32_t	timeout,
		struct sntp_time *	ts )

#include <zephyr/net/sntp.h>

Attempt to receive an SNTP response after issuing a query.

Parameters

ctx	Address of sntp context.
timeout	Timeout of waiting for sntp response (in milliseconds).
ts	Timestamp including integer and fractional seconds since 1 Jan 1970 (output).

Returns

0 if ok, <0 if error (-ETIMEDOUT if timeout).

sntp_send_async()

int sntp_send_async

(

struct sntp_ctx *

ctx

)

#include <zephyr/net/sntp.h>

Send the SNTP query.

Parameters

ctx	Address of sntp context.

Returns

0 if ok, <0 if error.

sntp_simple()

int sntp_simple	(	const char *	server,
		uint32_t	timeout,
		struct sntp_time *	ts )

#include <zephyr/net/sntp.h>

Convenience function to query SNTP in one-shot fashion.

Convenience wrapper which calls getaddrinfo(), sntp_init(), sntp_query(), and sntp_close().

Parameters

server	Address of server in format addr[:port]
timeout	Query timeout
ts	Timestamp including integer and fractional seconds since 1 Jan 1970 (output).

Returns

0 if ok, <0 if error (-ETIMEDOUT if timeout).

sntp_simple_addr()

int sntp_simple_addr	(	struct sockaddr *	addr,
		socklen_t	addr_len,
		uint32_t	timeout,
		struct sntp_time *	ts )

#include <zephyr/net/sntp.h>

Convenience function to query SNTP in one-shot fashion using a pre-initialized address struct.

Convenience wrapper which calls sntp_init(), sntp_query() and sntp_close().

Parameters

addr	IP address of NTP/SNTP server.
addr_len	IP address length of NTP/SNTP server.
timeout	Query timeout
ts	Timestamp including integer and fractional seconds since 1 Jan 1970 (output).

Returns

0 if ok, <0 if error (-ETIMEDOUT if timeout).