INTERFACE_HARDWARE_CROSSTIMESTAMP structure (iphlpapi.h)
Describes a cross timestamp retrieved from a network adapter. A cross timestamp refers to a set of network interface card (NIC) hardware timestamp and system timestamp(s) obtained very close to one another.
To retrieve a cross timestamp, call the CaptureInterfaceHardwareCrossTimestamp function. That function returns the timestamp from the network adapter in the form of an INTERFACE_HARDWARE_CROSSTIMESTAMP object.
For more info, and code examples, see Packet timestamping.
Syntax
typedef struct _INTERFACE_HARDWARE_CROSSTIMESTAMP {
ULONG64 SystemTimestamp1;
ULONG64 HardwareClockTimestamp;
ULONG64 SystemTimestamp2;
} INTERFACE_HARDWARE_CROSSTIMESTAMP, *PINTERFACE_HARDWARE_CROSSTIMESTAMP;
Members
SystemTimestamp1
Type: ULONG64
The network adapter driver fills this with a system timestamp whose value corresponds to a value returned by QueryPerformanceCounter (QPC).
SystemTimestamp1 is obtained before HardwareClockTimestamp; while SystemTimestamp2 is taken after HardwareClockTimestamp. The timestamp values are obtained as closely as possible to each other.
HardwareClockTimestamp
Type: ULONG64
The network adapter driver fills this with a value obtained from its network interface card (NIC) hardware clock.
SystemTimestamp2
Type: ULONG64
The network adapter driver fills this with a system timestamp whose value corresponds to a value returned by QueryPerformanceCounter (QPC).
SystemTimestamp1 is obtained before HardwareClockTimestamp; while SystemTimestamp2 is taken after HardwareClockTimestamp. The timestamp values are obtained as closely as possible to each other.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11 (Build 10.0.22000.194) |
| Minimum supported server | Windows Server 2022 |
| Header | iphlpapi.h |