1 files changed, 105 insertions, 0 deletions
diff --git a/usb/driver/release_interface.c b/usb/driver/release_interface.c
new file mode 100644
index 0000000..bcd483c
--- /dev/null
+++ b/usb/driver/release_interface.c
@@ -0,0 +1,105 @@
+/* libusb-win32, Generic Windows USB Library
+ * Copyright (c) 2002-2005 Stephan Meyer <ste_meyer@web.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include "libusb_driver.h"
+
+
+
+NTSTATUS release_interface(libusb_device_t *dev, FILE_OBJECT *file_object,
+                           int interface)
+{
+    USBMSG("interface %d\n", interface);
+
+    if (!dev->config.value)
+    {
+        USBERR0("device is not configured\n");
+        return STATUS_INVALID_DEVICE_STATE;
+    }
+
+    if (interface >= LIBUSB_MAX_NUMBER_OF_INTERFACES)
+    {
+        USBERR("interface number %d too high\n",
+                    interface);
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    if (!dev->config.interfaces[interface].valid)
+    {
+        USBERR("invalid interface %02d\n", interface);
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    if (!dev->config.interfaces[interface].file_object)
+    {
+        USBERR("could not release interface %d, interface is not claimed\n", interface);
+        return STATUS_INVALID_DEVICE_STATE;
+    }
+
+    if (dev->config.interfaces[interface].file_object != file_object)
+    {
+        USBERR("could not release interface %d, interface is not bound to this file object\n", interface);
+        return STATUS_DEVICE_BUSY;
+    }
+
+    dev->config.interfaces[interface].file_object = NULL;
+
+    return STATUS_SUCCESS;
+}
+
+NTSTATUS release_interface_ex(libusb_device_t *dev, 
+							  FILE_OBJECT *file_object, 
+							  interface_request_t* interface_request)
+{
+ 	PUSB_INTERFACE_DESCRIPTOR interface_descriptor;
+   
+	USBMSG("interface-%s=%d\n",
+		interface_request->intf_use_index ? "index" : "number",
+		interface_request->intf_use_index ? interface_request->interface_index : interface_request->interface_number);
+
+    if (!dev->config.value || !dev->config.descriptor)
+    {
+        USBERR0("device is not configured\n");
+        return STATUS_INVALID_DEVICE_STATE;
+    }
+
+	interface_request->altsetting_index=FIND_INTERFACE_INDEX_ANY;
+	interface_descriptor = find_interface_desc_ex(dev->config.descriptor,dev->config.total_size,interface_request,NULL);
+	if (!interface_descriptor)
+	{
+        return STATUS_NO_MORE_ENTRIES;
+	}
+	return release_interface(dev, file_object, interface_descriptor->bInterfaceNumber);
+}
+
+NTSTATUS release_all_interfaces(libusb_device_t *dev, FILE_OBJECT *file_object)
+{
+    int i;
+
+    USBMSG("releasing all interfaces bound to file object 0x%x\n", file_object);
+
+    for (i = 0; i < LIBUSB_MAX_NUMBER_OF_INTERFACES; i++)
+    {
+        if (dev->config.interfaces[i].file_object == file_object)
+        {
+            dev->config.interfaces[i].file_object = NULL;
+        }
+    }
+
+    return STATUS_SUCCESS;
+}