static long Verify(long size, long offset, MemoryStream* backingStore, long packetSize)
{
long ret = -1;
try
{
backingStore->setSize(size + offset);
}
catch (...)
{
esReport("Caught an exception.\n");
return -1;
}
es::Cache* cache = es::Cache::createInstance(backingStore);
if (!cache)
{
esReport("Unable to create cache.\n");
return -1;
}
es::Stream* stream = cache->getStream();
if (!stream)
{
esReport("Unable to create stream.\n");
return -1;
}
SetData(WriteBuf, size);
// write, changing number of packets.
ret = PacketWrite(stream, size, offset, packetSize);
stream->flush();
stream->release();
cache->release();
// read at once.
cache = es::Cache::createInstance(backingStore);
stream = cache->getStream();
ret = stream->read(ReadBuf, size, offset);
if (ret != size)
{
ret = -1;
goto ERROR;
}
#ifdef VERBOSE
esReport(" read : %5d\n", ret);
#endif // VERBOSE
if (memcmp(ReadBuf, WriteBuf, ret) != 0)
{
ret = -1;
}
else
{
ret = 0;
}
ERROR:
stream->release();
cache->release();
return ret;
}
DWORD _stdcall PacketIOControl(DWORD dwService,
DWORD dwDDB,
DWORD hDevice,
PDIOCPARAMETERS pDiocParms)
{
// called from applications
POPEN_INSTANCE Open;
NDIS_STATUS Status;
UCHAR AdapterBuffer[5];
NDIS_STRING AdapterName = NDIS_STRING_CONST(AdapterBuffer);
switch (dwService) {
case DIOC_OPEN:
return NDIS_STATUS_SUCCESS;
case DIOC_CLOSEHANDLE:
if ((Open = GetOpen(hDevice)) != NULL)
PacketUnbindAdapter(&Status, Open, NULL);
return NDIS_STATUS_SUCCESS;
case IOCTL_EPACKET_VERSION:
if (pDiocParms->cbOutBuffer < 2)
*(DWORD *)(pDiocParms->lpcbBytesReturned) = 0;
else {
((BYTE *)pDiocParms->lpvOutBuffer)[0] = MAJOR_VERSION;
((BYTE *)pDiocParms->lpvOutBuffer)[1] = MINOR_VERSION;
*(DWORD *)pDiocParms->lpcbBytesReturned = 2;
}
return NDIS_STATUS_SUCCESS;
case IOCTL_EPACKET_BIND:
memcpy(AdapterName.Buffer, (BYTE *)pDiocParms->lpvInBuffer,
min(strlen((char *)pDiocParms->lpvInBuffer), sizeof(AdapterBuffer)-1));
AdapterName.Buffer[sizeof(AdapterBuffer)-1] = '\0';
PacketBindAdapter(&Status,
GlobalDeviceExtension->NdisProtocolHandle,
&AdapterName,
(PVOID)hDevice, /* special */
NULL);
// Note: If the above usage of the 4'th arg to PacketBindAdapter
// causes problems, use a global variable instead.
if (Status == NDIS_STATUS_SUCCESS || Status == NDIS_STATUS_PENDING) {
*(DWORD *)pDiocParms->lpcbBytesReturned = 1;
return NDIS_STATUS_SUCCESS;
}
break;
case IOCTL_EPACKET_SET_OID:
case IOCTL_EPACKET_QUERY_OID:
if ((Open = GetOpen(hDevice)) != NULL)
return PacketRequest(Open, dwService, dwDDB, hDevice, pDiocParms);
break;
case IOCTL_EPACKET_READ:
if ((Open = GetOpen(hDevice)) != NULL)
return PacketRead(Open, dwDDB, hDevice, pDiocParms);
break;
case IOCTL_EPACKET_WRITE:
if ((Open = GetOpen(hDevice)) != NULL)
return PacketWrite(Open, dwDDB, hDevice, pDiocParms);
break;
}
*(DWORD *)pDiocParms->lpcbBytesReturned = 0;
return NDIS_STATUS_SUCCESS;
}
