[janderwald] 42823: - Partly implement KsCreateBusEnumObject

Author: janderwald
Date: Fri Aug 21 14:58:20 2009
New Revision: 42823

URL: http://svn.reactos.org/svn/reactos?rev=42823&view=rev
Log:
- Partly implement KsCreateBusEnumObject

Modified:
    trunk/reactos/drivers/ksfilter/ks/api.c
    trunk/reactos/drivers/ksfilter/ks/kstypes.h

Modified: trunk/reactos/drivers/ksfilter/ks/api.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/ksfilter/ks/api.c?r...
==============================================================================
--- trunk/reactos/drivers/ksfilter/ks/api.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/ksfilter/ks/api.c [iso-8859-1] Fri Aug 21 14:58:20 2009
@@ -1709,7 +1709,7 @@
 }

/*
-    @unimplemented
+    @implemented
 */
 KSDDKAPI
 NTSTATUS
@@ -1722,8 +1722,118 @@
     IN REFGUID InterfaceGuid OPTIONAL,
     IN PWCHAR ServiceRelativePath OPTIONAL)
 {
-    UNIMPLEMENTED
-    return STATUS_UNSUCCESSFUL;
+    ULONG Length;
+    NTSTATUS Status = STATUS_SUCCESS;
+    UNICODE_STRING ServiceKeyPath = RTL_CONSTANT_STRING(L"\REGISTRY\MACHINE\SYSTEM\CurrentControlSet\Services\");
+    PBUS_ENUM_DEVICE_EXTENSION BusDeviceExtension;
+    PDEVICE_EXTENSION DeviceExtension;
+
+    /* calculate sizeof bus enum device extension */
+    Length = wcslen(BusIdentifier) * sizeof(WCHAR);
+    Length += sizeof(BUS_ENUM_DEVICE_EXTENSION);
+
+    BusDeviceExtension = ExAllocatePool(NonPagedPool, Length);
+    if (!BusDeviceExtension)
+    {
+        /* not enough memory */
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    /* zero device extension */
+    RtlZeroMemory(BusDeviceExtension, sizeof(BUS_ENUM_DEVICE_EXTENSION));
+
+    /* initialize bus device extension */
+    wcscpy(BusDeviceExtension->BusIdentifier, BusIdentifier);
+
+    /* allocate service path string */
+    Length = ServiceKeyPath.MaximumLength;
+    Length += BusDeviceObject->DriverObject->DriverExtension->ServiceKeyName.MaximumLength;
+
+    if (ServiceRelativePath)
+    {
+        /* relative path for devices */
+        Length += wcslen(ServiceRelativePath) + 2 * sizeof(WCHAR);
+    }
+
+    BusDeviceExtension->ServicePath.Length = 0;
+    BusDeviceExtension->ServicePath.MaximumLength = Length;
+    BusDeviceExtension->ServicePath.Buffer = ExAllocatePool(NonPagedPool, Length);
+
+    if (!BusDeviceExtension->ServicePath.Buffer)
+    {
+        /* not enough memory */
+        ExFreePool(BusDeviceExtension);
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    RtlAppendUnicodeStringToString(&BusDeviceExtension->ServicePath, &ServiceKeyPath);
+    RtlAppendUnicodeStringToString(&BusDeviceExtension->ServicePath, &BusDeviceObject->DriverObject->DriverExtension->ServiceKeyName);
+
+    if (ServiceRelativePath)
+    {
+        RtlAppendUnicodeToString(&BusDeviceExtension->ServicePath, L"\");
+        RtlAppendUnicodeToString(&BusDeviceExtension->ServicePath, ServiceRelativePath);
+    }
+
+    if (InterfaceGuid)
+    {
+        /* register an device interface */
+        Status = IoRegisterDeviceInterface(PhysicalDeviceObject, InterfaceGuid, NULL, &BusDeviceExtension->SymbolicLinkName);
+
+        /* check for success */
+        if (!NT_SUCCESS(Status))
+        {
+            ExFreePool(BusDeviceExtension->ServicePath.Buffer);
+            ExFreePool(BusDeviceExtension);
+            return Status;
+        }
+
+        /* now enable device interface */
+        Status = IoSetDeviceInterfaceState(&BusDeviceExtension->SymbolicLinkName, TRUE);
+
+        if (!NT_SUCCESS(Status))
+        {
+            ExFreePool(BusDeviceExtension->ServicePath.Buffer);
+            ExFreePool(BusDeviceExtension);
+            return Status;
+        }
+
+        /* set state enabled */
+        BusDeviceExtension->Enabled = TRUE;
+    }
+
+    /* store device objects */
+    BusDeviceExtension->BusDeviceObject = BusDeviceObject;
+    BusDeviceExtension->PnpDeviceObject = PnpDeviceObject;
+    BusDeviceExtension->PhysicalDeviceObject = PhysicalDeviceObject;
+
+    if (!PnpDeviceObject)
+    {
+        BusDeviceExtension->PnpDeviceObject = IoAttachDeviceToDeviceStack(BusDeviceObject, PhysicalDeviceObject);
+
+        if (!BusDeviceExtension->PnpDeviceObject)
+        {
+            /* failed to attach device */
+            if (BusDeviceExtension->Enabled)
+            {
+                IoSetDeviceInterfaceState(&BusDeviceExtension->SymbolicLinkName, FALSE);
+                RtlFreeUnicodeString(&BusDeviceExtension->SymbolicLinkName);
+            }
+
+            /* free device extension */
+            ExFreePool(BusDeviceExtension->ServicePath.Buffer);
+            ExFreePool(BusDeviceExtension);
+
+            return STATUS_DEVICE_REMOVED;
+        }
+    }
+
+    /* attach device extension */
+    DeviceExtension = (PDEVICE_EXTENSION)BusDeviceObject->DeviceExtension;
+    DeviceExtension->DeviceHeader = (PKSIDEVICE_HEADER)BusDeviceExtension;
+
+    /* FIXME scan bus and invalidate device relations */
+    return Status;
 }

NTSTATUS

Modified: trunk/reactos/drivers/ksfilter/ks/kstypes.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/ksfilter/ks/kstypes...
==============================================================================
--- trunk/reactos/drivers/ksfilter/ks/kstypes.h [iso-8859-1] (original)
+++ trunk/reactos/drivers/ksfilter/ks/kstypes.h [iso-8859-1] Fri Aug 21 14:58:20 2009
@@ -145,4 +145,19 @@

typedef BOOLEAN (NTAPI *PKSEVENT_SYNCHRONIZED_ROUTINE)(PKSEVENT_CTX Context);

+typedef struct
+{
+    BOOLEAN Enabled;
+
+    PDEVICE_OBJECT PnpDeviceObject;
+    PDEVICE_OBJECT PhysicalDeviceObject;
+    PDEVICE_OBJECT BusDeviceObject;
+
+    UNICODE_STRING ServicePath;
+    UNICODE_STRING SymbolicLinkName;
+
+    WCHAR BusIdentifier[1];
+}BUS_ENUM_DEVICE_EXTENSION, *PBUS_ENUM_DEVICE_EXTENSION;
+
+
 #endif