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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 claim_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("interface %d does not exist\n", interface);
return STATUS_INVALID_PARAMETER;
}
if (dev->config.interfaces[interface].file_object == file_object)
{
return STATUS_SUCCESS;
}
if (dev->config.interfaces[interface].file_object)
{
USBERR("could not claim interface %d, interface is already claimed\n", interface);
return STATUS_DEVICE_BUSY;
}
dev->config.interfaces[interface].file_object = file_object;
return STATUS_SUCCESS;
}
NTSTATUS claim_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 claim_interface(dev, file_object, interface_descriptor->bInterfaceNumber);
}
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