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/* 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, unsigned char *altsetting,
int *ret, int timeout)
{
NTSTATUS status = STATUS_SUCCESS;
URB urb;
DEBUG_PRINT_NL();
DEBUG_MESSAGE("get_interface(): interface %d", interface);
DEBUG_MESSAGE("get_interface(): timeout %d", timeout);
if(!dev->config.value)
{
DEBUG_ERROR("get_interface(): invalid configuration 0");
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;
status = call_usbd(dev, &urb, IOCTL_INTERNAL_USB_SUBMIT_URB, timeout);
if(!NT_SUCCESS(status) || !USBD_SUCCESS(urb.UrbHeader.Status))
{
DEBUG_ERROR("get_interface(): getting interface "
"failed: status: 0x%x, urb-status: 0x%x",
status, urb.UrbHeader.Status);
*ret = 0;
}
else
{
*ret = urb.UrbControlGetInterfaceRequest.TransferBufferLength;
DEBUG_MESSAGE("get_interface(): current altsetting is %d", *altsetting);
}
return status;
}
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