NDIS_GET_PACKET_PROTOCOL_TYPE function
Note NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.
NDIS_GET_PACKET_PROTOCOL_TYPE returns the protocol ID associated with a given packet descriptor.
Syntax
UINT NDIS_GET_PACKET_PROTOCOL_TYPE(
_In_ PNDIS_PACKET Packet
);
Parameters
- Packet [in]
Pointer to a packet descriptor.
Return value
NDIS_GET_PACKET_PROTOCOL_TYPE returns the protocol ID associated with a given packet descriptor as one of the following values:
| Return code | Description |
|---|---|
| NDIS_PROTOCOL_ID_DEFAULT | Unspecified |
| NDIS_PROTOCOL_ID_TCP_IP | TCP/IP |
| NDIS_PROTOCOL_ID_IPX | IPX |
| NDIS_PROTOCOL_ID_NBF | NetBEUI |
Remarks
Drivers can test the Protocol ID associated with a packet descriptor to determine whether to perform an operation on a packet. For example, before passing a TCP/IP checksum operation to its NIC, a miniport driver could test the Protocol ID associated with a packet descriptor. If the Protocol ID is not NDIS_PROTOCOL_ID_TCP_IP, the miniport driver's NIC should not perform checksum operations on the associated packet.
Requirements
Target platform |
Desktop |
Header |
Ndis.h (include Ndis.h) |
IRQL |
<= DISPATCH_LEVEL |
See also