/************************************************************
Start the sending of a packet
************************************************************/
DWORD
PacketWrite(POPEN_INSTANCE Open,
DWORD dwDDB,
DWORD hDevice,
PDIOCPARAMETERS pDiocParms
)
{
PNDIS_PACKET pPacket;
PNDIS_BUFFER pNdisBuffer;
NDIS_STATUS Status;
TRACE_ENTER( "SendPacket" );
PacketAllocatePacketBuffer( &Status, Open, &pPacket, pDiocParms, IOCTL_PROTOCOL_WRITE );
if ( Status != NDIS_STATUS_SUCCESS )
{
return 0;
}
NdisSend( &Status, Open->AdapterHandle, pPacket );
if ( Status != NDIS_STATUS_PENDING )
{
PacketSendComplete( Open, pPacket, Status );
}
TRACE_LEAVE( "SendPacket" );
return(-1);
}
DWORD PacketRead(POPEN_INSTANCE Open,
DWORD dwDDB,
DWORD hDevice,
PDIOCPARAMETERS pDiocParms)
{
// read a packet
NDIS_STATUS Status;
PNDIS_PACKET pPacket;
// Check that the buffer can hold a max length Ethernet packet
if (pDiocParms->cbOutBuffer < ETHERNET_PACKET_LENGTH) {
*(DWORD *)(pDiocParms->lpcbBytesReturned) = 0; // Need bigger buffer
return NDIS_STATUS_SUCCESS;
}
PacketAllocatePacketBuffer(&Status, Open, &pPacket, pDiocParms, IOCTL_EPACKET_READ);
if (Status == NDIS_STATUS_SUCCESS) {
// Put this packet in a list of pending reads.
// The receive indication handler will attempt to remove packets
// from this list for use in transfer data calls
NdisAcquireSpinLock(&Open->RcvQSpinLock); // fixed 6.11.97
InsertTailList(&Open->RcvList, &RESERVED(pPacket)->ListElement);
NdisReleaseSpinLock(&Open->RcvQSpinLock);
}
return -1; // This will make DeviceIOControl return ERROR_IO_PENDING
}
DWORD PacketWrite(POPEN_INSTANCE Open,
DWORD dwDDB,
DWORD hDevice,
PDIOCPARAMETERS pDiocParms)
{
// write a packet
PNDIS_PACKET pPacket;
NDIS_STATUS Status;
PacketAllocatePacketBuffer(&Status, Open, &pPacket, pDiocParms, IOCTL_EPACKET_WRITE);
if (Status != NDIS_STATUS_SUCCESS)
return 0; // This will return immediately with no data written
// Call the MAC
NdisSend(&Status, Open->AdapterHandle, pPacket);
if (Status != NDIS_STATUS_PENDING) {
// The send didn't pend so call the completion handler now
PacketSendComplete(Open, pPacket, Status);
}
return(-1); // This will make DeviceIOControl return ERROR_IO_PENDING
}