[draft] winebus: implement BusQueryContainerID based on container sysfs path

Author: Claire Girka

dlls/winebus.sys/Makefile.in

@@ -1,6 +1,6 @@
 MODULE    = winebus.sys
 UNIXLIB   = winebus.so
-IMPORTS   = ntoskrnl hidparse
+IMPORTS   = ntoskrnl hidparse ole32
 UNIX_LIBS    = $(IOKIT_LIBS) $(UDEV_LIBS) $(PTHREAD_LIBS) $(INOTIFY_LIBS)
 UNIX_CFLAGS  = $(UDEV_CFLAGS) $(SDL2_CFLAGS)
 

dlls/winebus.sys/main.c

@@ -37,6 +37,7 @@
 #include "wine/debug.h"
 #include "wine/list.h"
 #include "wine/unixlib.h"
+#include "ole2.h"
 
 #include "unixlib.h"
 
@@ -198,6 +199,36 @@ static WCHAR *get_instance_id(DEVICE_OBJECT *device)
     return dst;
 }
 
+static WCHAR *get_container_id(DEVICE_OBJECT *device)
+{
+    struct device_extension *ext = (struct device_extension *)device->DeviceExtension;
+    UINT len = (38+1)*sizeof(WCHAR);
+    WCHAR *dst;
+    GUID guid;
+    const char *p;
+
+    if (!ext->desc.container_syspath[0])
+        return NULL;
+
+    memset(&guid, 0, sizeof(GUID));
+    guid.Data1 = (ext->desc.vid << 16) | ext->desc.pid;
+
+    /* Get just the USB bus-devpath part */
+    p = strrchr(ext->desc.container_syspath, '/');
+    if (!p || (p - ext->desc.container_syspath) <= 12)
+        return NULL;
+
+    for (int i = 0; p[i]; i++) {
+      ((char *) &guid)[4 + i % 12] ^= p[i];
+    }
+
+    if (!(dst = ExAllocatePool(PagedPool, len)))
+        return NULL;
+
+    StringFromGUID2(&guid, dst, len);
+    return dst;
+}
+
 static WCHAR *get_device_id(DEVICE_OBJECT *device)
 {
     static const WCHAR input_format[] = L"&MI_%02u";
@@ -522,6 +553,10 @@ static NTSTATUS handle_IRP_MN_QUERY_ID(DEVICE_OBJECT *device, IRP *irp)
             TRACE("BusQueryInstanceID\n");
             irp->IoStatus.Information = (ULONG_PTR)get_instance_id(device);
             break;
+        case BusQueryContainerID:
+            TRACE("BusQueryContainerID\n");
+            irp->IoStatus.Information = (ULONG_PTR)get_container_id(device);
+            break;
         default:
             FIXME("Unhandled type %08x\n", type);
             return status;