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wineusb.sys: Avoid hard-coding ID string lengths. 

Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2022-05-11 19:01:48 -05:00 committed by Alexandre Julliard
parent 2cb0cde3e5
commit 9f83526821
1 changed files with 58 additions and 25 deletions
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83
dlls/wineusb.sys/wineusb.c
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@ -300,30 +300,66 @@ static NTSTATUS fdo_pnp(IRP *irp)
return IoCallDriver(bus_pdo, irp);
}
static void get_device_id(const struct usb_device *device, WCHAR *buffer)
struct string_buffer
{
WCHAR *string;
size_t len;
};
static void WINAPIV append_id(struct string_buffer *buffer, const WCHAR *format, ...)
{
__ms_va_list args;
WCHAR *string;
int len;
__ms_va_start(args, format);
len = _vsnwprintf(NULL, 0, format, args) + 1;
if (!(string = ExAllocatePool(PagedPool, (buffer->len + len) * sizeof(WCHAR))))
{
if (buffer->string)
ExFreePool(buffer->string);
buffer->string = NULL;
return;
}
if (buffer->string)
{
memcpy(string, buffer->string, buffer->len * sizeof(WCHAR));
ExFreePool(buffer->string);
}
_vsnwprintf(string + buffer->len, len, format, args);
buffer->string = string;
buffer->len += len;
__ms_va_end(args);
}
static const WCHAR emptyW[] = {0};
static void get_device_id(const struct usb_device *device, struct string_buffer *buffer)
{
static const WCHAR formatW[] = {'U','S','B','\\','V','I','D','_','%','0','4','X',
'&','P','I','D','_','%','0','4','X',0};
struct libusb_device_descriptor desc;
libusb_get_device_descriptor(device->libusb_device, &desc);
sprintfW(buffer, formatW, desc.idVendor, desc.idProduct);
append_id(buffer, formatW, desc.idVendor, desc.idProduct);
}
static void get_hardware_ids(const struct usb_device *device, WCHAR *buffer)
static void get_hardware_ids(const struct usb_device *device, struct string_buffer *buffer)
{
static const WCHAR formatW[] = {'U','S','B','\\','V','I','D','_','%','0','4','X',
'&','P','I','D','_','%','0','4','X','&','R','E','V','_','%','0','4','X',0};
struct libusb_device_descriptor desc;
libusb_get_device_descriptor(device->libusb_device, &desc);
buffer += sprintfW(buffer, formatW, desc.idVendor, desc.idProduct, desc.bcdDevice) + 1;
append_id(buffer, formatW, desc.idVendor, desc.idProduct, desc.bcdDevice);
get_device_id(device, buffer);
buffer += strlenW(buffer) + 1;
*buffer = 0;
append_id(buffer, emptyW);
}
static void get_compatible_ids(const struct usb_device *device, WCHAR *buffer)
static void get_compatible_ids(const struct usb_device *device, struct string_buffer *buffer)
{
static const WCHAR prot_format[] = {'U','S','B','\\','C','l','a','s','s','_','%','0','2','x',
'&','S','u','b','C','l','a','s','s','_','%','0','2','x',
@ -336,40 +372,34 @@ static void get_compatible_ids(const struct usb_device *device, WCHAR *buffer)
libusb_get_device_descriptor(device->libusb_device, &device_desc);
buffer += sprintfW(buffer, prot_format, device_desc.bDeviceClass, device_desc.bDeviceSubClass,
device_desc.bDeviceProtocol) + 1;
buffer += sprintfW(buffer, subclass_format, device_desc.bDeviceClass, device_desc.bDeviceSubClass) + 1;
buffer += sprintfW(buffer, class_format, device_desc.bDeviceClass) + 1;
*buffer = 0;
append_id(buffer, prot_format, device_desc.bDeviceClass,
device_desc.bDeviceSubClass, device_desc.bDeviceProtocol);
append_id(buffer, subclass_format, device_desc.bDeviceClass, device_desc.bDeviceSubClass);
append_id(buffer, class_format, device_desc.bDeviceClass);
append_id(buffer, emptyW);
}
static NTSTATUS query_id(const struct usb_device *device, IRP *irp, BUS_QUERY_ID_TYPE type)
{
WCHAR *id = NULL;
static const WCHAR instance_idW[] = {'0',0};
struct string_buffer buffer = {0};
switch (type)
{
case BusQueryDeviceID:
if ((id = ExAllocatePool(PagedPool, 28 * sizeof(WCHAR))))
get_device_id(device, id);
get_device_id(device, &buffer);
break;
case BusQueryInstanceID:
if ((id = ExAllocatePool(PagedPool, 2 * sizeof(WCHAR))))
{
id[0] = '0';
id[1] = 0;
}
append_id(&buffer, instance_idW);
break;
case BusQueryHardwareIDs:
if ((id = ExAllocatePool(PagedPool, (28 + 37 + 1) * sizeof(WCHAR))))
get_hardware_ids(device, id);
get_hardware_ids(device, &buffer);
break;
case BusQueryCompatibleIDs:
if ((id = ExAllocatePool(PagedPool, (33 + 25 + 13 + 1) * sizeof(WCHAR))))
get_compatible_ids(device, id);
get_compatible_ids(device, &buffer);
break;
default:
@ -377,7 +407,10 @@ static NTSTATUS query_id(const struct usb_device *device, IRP *irp, BUS_QUERY_ID
return irp->IoStatus.Status;
}
irp->IoStatus.Information = (ULONG_PTR)id;
if (!buffer.string)
return STATUS_NO_MEMORY;
irp->IoStatus.Information = (ULONG_PTR)buffer.string;
return STATUS_SUCCESS;
}