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