Execute synchronous NDIS request.

Syntax:

function SyncRequest(RequestType: UINT; 
                             Oid: UINT; 
                         pBuffer: Pointer; 
                      BufferSize: UINT;
                      pBytesUsed: PUINT; 
                    pBytesNeeded: PUINT; 
                     pNdisStatus: PUINT): DWORD;

Parameters:

RequestType

[in] NDIS request type (see NDIS REQUEST TYPE).

Oid

[in] NDIS request code (see NDIS OIDs).

pBuffer

[in,out] Buffer for NDIS request input parameters, also is used for request result.

BufferSize

[in] Data buffer size.

pBytesUsed

[out] On request completion specifies the read/sent data size in bytes.

pBytesNeeded

[out] If the buffer size is not enough, on the NDIS request completion this parameter contains necessary buffer size (see NDIS_STATUS_INVALID_LENGTH or NDIS_STATUS_BUFFER_TOO_SHORT)

pNdisStatus

[out] The status returned by OS NDIS driver (see NDIS STATUS)

Return values:

Description:

NDIS technology is significant part of the network stack in the Windows OS family, it is realized as OS driver NDIS.VXD for Windows 9x/Me or NDIS.SYS for Windows NT/2k/XP/2k3/Vista.

NDIS provides interconnection between NIC drivers and protocol drivers (internal PSSDK driver is a protocol driver). Protocol driver can manage NIC driver by NDIS requests, also protocol driver can obtain necessary information from the NIC driver.

After successfully opening of the network adapter by OpenAdapter function you can execute synchronous NDIS request to the NIC driver.

For details please refer to MSDN, DDK documentation, and NIC vendor's specifications.

// Get quantity of the succesfully sent packets.

const OID_GEN_XMIT_OK = $00020101;

Value: ULARGE_INTEGER;

HNAdapter.OpenAdapter();
...
SyncRequest(NdisRequestQueryInformation,OID_GEN_XMIT_OK,
             @Value,sizeof(Value),NULL,NULL,NULL);