NDIS_TIMESTAMP_CAPABILITIES structure (ntddndis.h)
The NDIS_TIMESTAMP_CAPABILITIES structure describes the combined timestamping capabilities of a network interface card (NIC) and miniport driver.
Syntax
typedef struct _NDIS_TIMESTAMP_CAPABILITIES {
NDIS_OBJECT_HEADER Header;
ULONG64 HardwareClockFrequencyHz;
BOOLEAN CrossTimestamp;
ULONG64 Reserved1;
ULONG64 Reserved2;
NDIS_TIMESTAMP_CAPABILITY_FLAGS TimestampFlags;
} NDIS_TIMESTAMP_CAPABILITIES, *PNDIS_TIMESTAMP_CAPABILITIES;
Members
Header
The NDIS_OBJECT_HEADER structure that describes this NDIS_TIMESTAMP_CAPABILITIES structure. Set the members of the NDIS_OBJECT_HEADER structure as follows:
Set the Type member to NDIS_OBJECT_TYPE_DEFAULT.
Set the Revision member to NDIS_TIMESTAMP_CAPABILITIES_REVISION_1.
Set the Size member to NDIS_SIZEOF_TIMESTAMP_CAPABILITIES_REVISION_1.
HardwareClockFrequencyHz
This field contains the nominal frequency of the hardware clock that the NIC uses for timestamping, rounded off to the nearest integer in Hertz units.
CrossTimestamp
A value of TRUE indicates that the miniport/hardware combination is capable of generating a hardware cross timestamp. A value of FALSE indicates this capability does not exist. A cross timestamp is the set of a NIC hardware timestamp and system timestamp(s) obtained very close to each other. The miniport driver handles the OID_TIMESTAMP_GET_CROSSTIMESTAMP OID to generate a cross timestamp.
Reserved1
Reserved for future use.
Reserved2
Reserved for future use.
TimestampFlags
An NDIS_TIMESTAMP_CAPABILITY_FLAGS structure that represents the NIC's timestamping capabilities in various contexts.
Remarks
Miniport drivers use the NDIS_TIMESTAMP_CAPABILITIES structure with the NDIS_STATUS_TIMESTAMP_CAPABILITY status indication to report the NIC's hardware timestamping capabilities and the miniport driver's software timestamping capabilities to NDIS and overlying drivers.
Note
An implementation must support hardware timestamps and cross timestamps. Supporting software timestamps is optional.
Miniport drivers use the NDIS_TIMESTAMP_CAPABILITIES structure with the NDIS_STATUS_TIMESTAMP_CURRENT_CONFIG status indication to report which timestamping capabilities are currently enabled.
For more information, see Reporting timestamping capabilities and current configuration.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11 |
| Minimum supported server | Windows Server 2022. Supported in NDIS 6.82 and later. |
| Header | ntddndis.h (include ndis.h) |
See also
NDIS_TIMESTAMP_CAPABILITY_FLAGS
NDIS_STATUS_TIMESTAMP_CAPABILITY
NDIS_STATUS_TIMESTAMP_CURRENT_CONFIG
OID_TIMESTAMP_GET_CROSSTIMESTAMP
Reporting timestamping capabilities and current configuration