SNTP

This module includes functions that control SNTP communication.

Summary

Typedefs
otSntpQuery typedef
struct otSntpQuery
This structure implements SNTP Query parameters.
otSntpResponseHandler)(void *aContext, uint64_t aTime, otError aResult) typedef
void(*
This function pointer is called when a SNTP response is received.

Functions
otSntpClientQuery(otInstance *aInstance, const otSntpQuery *aQuery, otSntpResponseHandler aHandler, void *aContext)
This function sends a SNTP query.
otSntpClientSetUnixEra(otInstance *aInstance, uint32_t aUnixEra)
void
This function sets the unix era number.

Structs
otSntpQuery

This structure implements SNTP Query parameters.

Typedefs

otSntpQuery

struct otSntpQuery otSntpQuery

This structure implements SNTP Query parameters.

otSntpResponseHandler

void(* otSntpResponseHandler)(void *aContext, uint64_t aTime, otError aResult)

This function pointer is called when a SNTP response is received.

Details
Parameters
[in] aContext
A pointer to application-specific context.
[in] aTime
Specifies the time at the server when the response left for the client, in UNIX time.
[in] aResult
A result of the SNTP transaction.
Return Values
OT_ERROR_NONE
A response was received successfully and time is provided in aTime.
OT_ERROR_ABORT
A SNTP transaction was aborted by stack.
OT_ERROR_BUSY
The Kiss-o'-death packet has been received.
OT_ERROR_RESPONSE_TIMEOUT
No SNTP response has been received within timeout.
OT_ERROR_FAILED
A response was received but contains incorrect data.

Functions

otSntpClientQuery

otError otSntpClientQuery(
  otInstance *aInstance,
  const otSntpQuery *aQuery,
  otSntpResponseHandler aHandler,
  void *aContext
)

This function sends a SNTP query.

This function is available only if feature OPENTHREAD_CONFIG_SNTP_CLIENT_ENABLE is enabled.

Details
Parameters
[in] aInstance
A pointer to an OpenThread instance.
[in] aQuery
A pointer to specify SNTP query parameters.
[in] aHandler
A function pointer that shall be called on response reception or time-out.
[in] aContext
A pointer to arbitrary context information.

otSntpClientSetUnixEra

void otSntpClientSetUnixEra(
  otInstance *aInstance,
  uint32_t aUnixEra
)

This function sets the unix era number.

The default value of unix era is set to 0. The subsequent eras start after year 2106.

Details
Parameters
[in] aInstance
A pointer to an OpenThread instance.
[in] aUnixEra
Unix era number.

Macros

OT_SNTP_DEFAULT_SERVER_IP

 OT_SNTP_DEFAULT_SERVER_IP "2001:4860:4806:8::"

Defines default SNTP Server address - Google NTP Server.

OT_SNTP_DEFAULT_SERVER_PORT

 OT_SNTP_DEFAULT_SERVER_PORT 123

Defines default SNTP Server port.

Resources

OpenThread API Reference topics originate from the source code, available on GitHub. For more information, or to contribute to our documentation, refer to Resources.