ReadPackets

BOOL ReadPackets ( HANDLE hOpen, PETH_M_REQUEST pPacket );

Return Value:

TRUE if call was successful, FALSE otherwise

Parameters:

hOpen

Specifies driver object open handle.

pPacket

Pointer to the user allocated and initialized ETH_M_REQUEST structure.

Remarks:

This member is a simple wrapper for IOCTL_NDISRD_READ_PACKETS. For this call the following fields of ETH_M_REQUEST must be initialized:

• ETH_M_REQUEST.hAdapterHandle must be set to the interface handle (obtained via call to CNdisApi::GetTcpipBoundAdaptersInfo). The packets will be extracted from the network interface associated packet queue. Remember that packets queued only when network interface in the filtering of listening mode.
• ETH_M_REQUEST.dwPacketsNumber must be set to a number of entries in EthPacket array
• ETH_M_REQUEST.EthPacket[i].Buffer must point to the user allocated INTERMEDIATE_BUFFER structure

The following fields of the ETH_M_REQUEST and INTERMEDIATE_BUFFER are initialized by helper driver in case of success:

• ETH_M_REQUEST.dwPacketSuccess contains number of packets returned by driver
• INTERMEDIATE_BUFFER.m_IBuffer contains Ethernet packet
• INTERMEDIATE_BUFFER.m_Length contains the actual length of the packet
• INTERMEDIATE_BUFFER.m_Flags is a combination of NDIS_FLAGS_XXX (defined in ndis.h). These flags are copied from the NDIS_PACKET.Private.Flags.
• INTERMEDIATE_BUFFER.m_dwDeviceFlags is PACKET_FLAG_ON_SEND if packet goes from MSTCP to network interface or PACKET_FLAG_ON_RECEIVE otherwise.