NTSTATUS
EventThread(IN LPVOID lpParameter)
{
UNICODE_STRING EnumU = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\Enum");
UNICODE_STRING ServicesU = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\Services");
PPLUGPLAY_EVENT_BLOCK PnpEvent;
OBJECT_ATTRIBUTES ObjectAttributes;
ULONG PnpEventSize;
HINF hInf;
HANDLE hEnum, hServices;
NTSTATUS Status;
hInf = *(HINF *)lpParameter;
InitializeObjectAttributes(&ObjectAttributes, &EnumU, OBJ_CASE_INSENSITIVE, NULL, NULL);
Status = NtOpenKey(&hEnum, KEY_QUERY_VALUE, &ObjectAttributes);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtOpenKey('%wZ') failed with status 0x%08lx\n", &EnumU, Status);
return Status;
}
InitializeObjectAttributes(&ObjectAttributes, &ServicesU, OBJ_CASE_INSENSITIVE, NULL, NULL);
Status = NtCreateKey(&hServices, KEY_ALL_ACCESS, &ObjectAttributes, 0, NULL, 0, NULL);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtCreateKey('%wZ') failed with status 0x%08lx\n", &ServicesU, Status);
NtClose(hEnum);
return Status;
}
PnpEventSize = 0x1000;
PnpEvent = (PPLUGPLAY_EVENT_BLOCK)RtlAllocateHeap(ProcessHeap, 0, PnpEventSize);
if (PnpEvent == NULL)
{
NtClose(hEnum);
NtClose(hServices);
return STATUS_NO_MEMORY;
}
for (;;)
{
DPRINT("Calling NtGetPlugPlayEvent()\n");
/* Wait for the next pnp event */
Status = NtGetPlugPlayEvent(0, 0, PnpEvent, PnpEventSize);
/* Resize the buffer for the PnP event if it's too small. */
if (Status == STATUS_BUFFER_TOO_SMALL)
{
PnpEventSize += 0x400;
RtlFreeHeap(ProcessHeap, 0, PnpEvent);
PnpEvent = (PPLUGPLAY_EVENT_BLOCK)RtlAllocateHeap(ProcessHeap, 0, PnpEventSize);
if (PnpEvent == NULL)
{
NtClose(hEnum);
NtClose(hServices);
return STATUS_NO_MEMORY;
}
continue;
}
if (!NT_SUCCESS(Status))
{
DPRINT("NtPlugPlayEvent() failed (Status %lx)\n", Status);
break;
}
/* Process the pnp event */
DPRINT("Received PnP Event\n");
if (IsEqualIID(&PnpEvent->EventGuid, (REFGUID)&GUID_DEVICE_ENUMERATED))
{
DPRINT("Device arrival event: %S\n", PnpEvent->TargetDevice.DeviceIds);
InstallDevice(hInf, hEnum, hServices, PnpEvent->TargetDevice.DeviceIds);
}
else
{
DPRINT("Unknown event\n");
}
/* Dequeue the current pnp event and signal the next one */
NtPlugPlayControl(PlugPlayControlUserResponse, NULL, 0);
}
RtlFreeHeap(ProcessHeap, 0, PnpEvent);
NtClose(hEnum);
NtClose(hServices);
return STATUS_SUCCESS;
}
static ULONG NTAPI
PnpEventThread(IN PVOID Parameter)
{
NTSTATUS Status;
PPLUGPLAY_EVENT_BLOCK PnpEvent, NewPnpEvent;
ULONG PnpEventSize;
UNREFERENCED_PARAMETER(Parameter);
PnpEventSize = 0x1000;
PnpEvent = RtlAllocateHeap(ProcessHeap, 0, PnpEventSize);
if (PnpEvent == NULL)
{
Status = STATUS_NO_MEMORY;
goto Quit;
}
for (;;)
{
DPRINT("Calling NtGetPlugPlayEvent()\n");
/* Wait for the next PnP event */
Status = NtGetPlugPlayEvent(0, 0, PnpEvent, PnpEventSize);
/* Resize the buffer for the PnP event if it's too small */
if (Status == STATUS_BUFFER_TOO_SMALL)
{
PnpEventSize += 0x400;
NewPnpEvent = RtlReAllocateHeap(ProcessHeap, 0, PnpEvent, PnpEventSize);
if (NewPnpEvent == NULL)
{
Status = STATUS_NO_MEMORY;
goto Quit;
}
PnpEvent = NewPnpEvent;
continue;
}
if (!NT_SUCCESS(Status))
{
DPRINT1("NtGetPlugPlayEvent() failed (Status 0x%08lx)\n", Status);
goto Quit;
}
/* Process the PnP event */
DPRINT("Received PnP Event\n");
if (IsEqualGUID(&PnpEvent->EventGuid, &GUID_DEVICE_ENUMERATED))
{
DeviceInstallParams* Params;
ULONG len;
ULONG DeviceIdLength;
DPRINT("Device enumerated event: %S\n", PnpEvent->TargetDevice.DeviceIds);
DeviceIdLength = wcslen(PnpEvent->TargetDevice.DeviceIds);
if (DeviceIdLength)
{
/* Queue device install (will be dequeued by DeviceInstallThread) */
len = FIELD_OFFSET(DeviceInstallParams, DeviceIds) + (DeviceIdLength + 1) * sizeof(WCHAR);
Params = RtlAllocateHeap(ProcessHeap, 0, len);
if (Params)
{
wcscpy(Params->DeviceIds, PnpEvent->TargetDevice.DeviceIds);
RtlInterlockedPushEntrySList(&DeviceInstallListHead, &Params->ListEntry);
NtSetEvent(hDeviceInstallListNotEmpty, NULL);
}
else
{
DPRINT1("Not enough memory (size %lu)\n", len);
}
}
}
else
{
DPRINT("Unknown event, GUID {%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}\n",
PnpEvent->EventGuid.Data1, PnpEvent->EventGuid.Data2, PnpEvent->EventGuid.Data3,
PnpEvent->EventGuid.Data4[0], PnpEvent->EventGuid.Data4[1], PnpEvent->EventGuid.Data4[2],
PnpEvent->EventGuid.Data4[3], PnpEvent->EventGuid.Data4[4], PnpEvent->EventGuid.Data4[5],
PnpEvent->EventGuid.Data4[6], PnpEvent->EventGuid.Data4[7]);
}
/* Dequeue the current PnP event and signal the next one */
NtPlugPlayControl(PlugPlayControlUserResponse, NULL, 0);
}
Status = STATUS_SUCCESS;
Quit:
if (PnpEvent)
RtlFreeHeap(ProcessHeap, 0, PnpEvent);
NtTerminateThread(NtCurrentThread(), Status);
return Status;
}