1 files changed, 109 insertions, 0 deletions
diff --git a/usb/driver/get_interface.c b/usb/driver/get_interface.c
new file mode 100644
index 0000000..b218281
--- /dev/null
+++ b/usb/driver/get_interface.c
@@ -0,0 +1,109 @@
+/* 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 get_interface(libusb_device_t *dev,
+					   int interface_number, 
+					   unsigned char *altsetting,
+					   int timeout)
+{
+    NTSTATUS status = STATUS_SUCCESS;
+    URB urb;
+	PUSB_INTERFACE_DESCRIPTOR interface_descriptor;
+
+	USBMSG("interface: %d timeout: %d\n", interface_number, timeout);
+
+    if (!dev->config.value)
+    {
+        USBERR0("invalid configuration 0\n");
+        return STATUS_INVALID_DEVICE_STATE;
+    }
+
+    memset(&urb, 0, sizeof(URB));
+
+    urb.UrbHeader.Function = URB_FUNCTION_GET_INTERFACE;
+    urb.UrbHeader.Length = sizeof(struct _URB_CONTROL_GET_INTERFACE_REQUEST);
+    urb.UrbControlGetInterfaceRequest.TransferBufferLength = 1;
+    urb.UrbControlGetInterfaceRequest.TransferBuffer = altsetting;
+    urb.UrbControlGetInterfaceRequest.Interface = (USHORT)interface_number;
+
+    status = call_usbd(dev, &urb, IOCTL_INTERNAL_USB_SUBMIT_URB, timeout);
+
+    if (!NT_SUCCESS(status) || !USBD_SUCCESS(urb.UrbHeader.Status))
+    {
+        USBERR("getting interface failed: status: 0x%x, urb-status: 0x%x\n",
+                    status, urb.UrbHeader.Status);
+    }
+    else
+    {
+        USBMSG("current altsetting is %d\n", *altsetting);
+    }
+
+    return status;
+}
+
+NTSTATUS get_interface_ex(libusb_device_t *dev, 
+					   interface_request_t* interface_request, 
+                       int timeout)
+{
+    unsigned char alt_number;
+	NTSTATUS status = STATUS_SUCCESS;
+
+    USB_INTERFACE_DESCRIPTOR *interface_descriptor = NULL;
+
+	USBMSG("interface-%s=%d timeout=%d\n",
+		interface_request->intf_use_index ? "index" : "number",
+		interface_request->intf_use_index ? interface_request->interface_index : interface_request->interface_number,
+		timeout);
+
+    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;
+	}
+
+	status = get_interface(dev,interface_descriptor->bInterfaceNumber, &alt_number, timeout);
+	if (!NT_SUCCESS(status))
+	{
+        return STATUS_NO_MORE_ENTRIES;
+	}
+
+	interface_request->interface_number=interface_descriptor->bInterfaceNumber;
+	interface_request->altsetting_number=alt_number;
+	interface_request->altf_use_index=0;
+	interface_request->intf_use_index=0;
+
+	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 status;
+}