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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_descriptor(libusb_device_t *dev,
void *buffer, int size, int type, int recipient,
int index, int language_id, int *received, int timeout)
{
NTSTATUS status = STATUS_SUCCESS;
URB urb;
DEBUG_PRINT_NL();
DEBUG_MESSAGE("get_descriptor(): buffer size %d", size);
DEBUG_MESSAGE("get_descriptor(): type %04d", type);
DEBUG_MESSAGE("get_descriptor(): recipient %04d", recipient);
DEBUG_MESSAGE("get_descriptor(): index %04d", index);
DEBUG_MESSAGE("get_descriptor(): language id %04d", language_id);
DEBUG_MESSAGE("get_descriptor(): timeout %d", timeout);
memset(&urb, 0, sizeof(struct _URB_CONTROL_DESCRIPTOR_REQUEST));
switch(recipient)
{
case USB_RECIP_DEVICE:
urb.UrbHeader.Function = URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE;
break;
case USB_RECIP_INTERFACE:
urb.UrbHeader.Function = URB_FUNCTION_GET_DESCRIPTOR_FROM_INTERFACE;
break;
case USB_RECIP_ENDPOINT:
urb.UrbHeader.Function = URB_FUNCTION_GET_DESCRIPTOR_FROM_ENDPOINT;
break;
default:
DEBUG_ERROR("get_descriptor(): invalid recipient");
return STATUS_INVALID_PARAMETER;
}
urb.UrbHeader.Length = sizeof(struct _URB_CONTROL_DESCRIPTOR_REQUEST);
urb.UrbControlDescriptorRequest.TransferBufferLength = size;
urb.UrbControlDescriptorRequest.TransferBuffer = buffer;
urb.UrbControlDescriptorRequest.DescriptorType = (UCHAR)type;
urb.UrbControlDescriptorRequest.Index = (UCHAR)index;
urb.UrbControlDescriptorRequest.LanguageId = (USHORT)language_id;
status = call_usbd(dev, &urb, IOCTL_INTERNAL_USB_SUBMIT_URB, timeout);
if(!NT_SUCCESS(status) || !USBD_SUCCESS(urb.UrbHeader.Status))
{
DEBUG_ERROR("get_descriptor(): getting descriptor "
"failed: status: 0x%x, urb-status: 0x%x",
status, urb.UrbHeader.Status);
*received = 0;
}
else
{
*received = urb.UrbControlDescriptorRequest.TransferBufferLength;
}
return status;
}
USB_CONFIGURATION_DESCRIPTOR *
get_config_descriptor(libusb_device_t *dev, int value, int *size)
{
NTSTATUS status;
USB_CONFIGURATION_DESCRIPTOR *desc = NULL;
USB_DEVICE_DESCRIPTOR device_descriptor;
int i;
volatile int desc_size;
status = get_descriptor(dev, &device_descriptor,
sizeof(USB_DEVICE_DESCRIPTOR),
USB_DEVICE_DESCRIPTOR_TYPE,
USB_RECIP_DEVICE,
0, 0, size, LIBUSB0_DEFAULT_TIMEOUT);
if(!NT_SUCCESS(status) || *size != sizeof(USB_DEVICE_DESCRIPTOR))
{
DEBUG_ERROR("get_config_descriptor(): getting device descriptor failed");
return NULL;
}
if(!(desc = ExAllocatePool(NonPagedPool,
sizeof(USB_CONFIGURATION_DESCRIPTOR))))
{
DEBUG_ERROR("get_config_descriptor(): memory allocation error");
return NULL;
}
for(i = 0; i < device_descriptor.bNumConfigurations; i++)
{
if(!NT_SUCCESS(get_descriptor(dev, desc,
sizeof(USB_CONFIGURATION_DESCRIPTOR),
USB_CONFIGURATION_DESCRIPTOR_TYPE,
USB_RECIP_DEVICE,
i, 0, size, LIBUSB0_DEFAULT_TIMEOUT)))
{
DEBUG_ERROR("get_config_descriptor(): getting configuration "
"descriptor failed");
break;
}
if(desc->bConfigurationValue == value)
{
desc_size = desc->wTotalLength;
ExFreePool(desc);
if(!(desc = ExAllocatePool(NonPagedPool, desc_size)))
{
DEBUG_ERROR("get_config_descriptor(): memory allocation error");
break;
}
if(!NT_SUCCESS(get_descriptor(dev, desc, desc_size,
USB_CONFIGURATION_DESCRIPTOR_TYPE,
USB_RECIP_DEVICE,
i, 0, size, LIBUSB0_DEFAULT_TIMEOUT)))
{
DEBUG_ERROR("get_config_descriptor(): getting configuration "
"descriptor failed");
break;
}
return desc;
}
}
if(desc)
{
ExFreePool(desc);
}
return NULL;
}
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