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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_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;
}
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