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core: Split out USB discovery and add virtual device discovery

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This commit is contained in:
Benjamin Berg 2019-06-06 17:23:30 +02:00
parent 5c0bc90677
commit 8a53591766
1 changed files with 65 additions and 25 deletions
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90
libfprint/fpi-core.c
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@ -270,6 +270,60 @@ static struct fp_dscv_dev *discover_usb_dev(libusb_device *udev)
return ddev;
}
static void discover_usb_devs(GPtrArray *found_devices)
{
libusb_device *udev;
libusb_device **devs;
int r;
int i = 0;
r = libusb_get_device_list(fpi_usb_ctx, &devs);
if (r < 0) {
fp_err("couldn't enumerate USB devices, error %d", r);
return;
}
/* Check each device against each driver, temporarily storing successfully
* discovered devices in a GPtrArray. */
while ((udev = devs[i++]) != NULL) {
struct fp_dscv_dev *ddev = discover_usb_dev(udev);
if (!ddev)
continue;
/* discover_usb_dev() doesn't hold a reference to the udev,
* so increase the reference for ddev to hold this ref */
libusb_ref_device(udev);
g_ptr_array_add (found_devices, (gpointer) ddev);
}
libusb_free_device_list(devs, 1);
}
static void discover_virtual_devs(GPtrArray *found_devices)
{
GSList *elem;
for (elem = registered_drivers; elem; elem = g_slist_next(elem)) {
struct fp_driver *drv = elem->data;
struct fp_dscv_dev *ddev = NULL;
const gchar *var;
if (drv->bus != BUS_TYPE_VIRTUAL)
continue;
var = g_getenv (drv->id_table.virtual_envvar);
if (var == NULL)
continue;
ddev = g_malloc0(sizeof(*ddev));
ddev->drv = drv;
ddev->bus = BUS_TYPE_VIRTUAL;
ddev->desc.virtual_env = var;
ddev->devtype = 0;
g_ptr_array_add (found_devices, ddev);
}
}
/**
* fp_discover_devs:
*
@ -283,39 +337,25 @@ static struct fp_dscv_dev *discover_usb_dev(libusb_device *udev)
*/
API_EXPORTED struct fp_dscv_dev **fp_discover_devs(void)
{
GPtrArray *tmparray;
libusb_device *udev;
libusb_device **devs;
int r;
int i = 0;
GPtrArray *found_devices;
g_return_val_if_fail (registered_drivers != NULL, NULL);
r = libusb_get_device_list(fpi_usb_ctx, &devs);
if (r < 0) {
fp_err("couldn't enumerate USB devices, error %d", r);
found_devices = g_ptr_array_new ();
discover_usb_devs (found_devices);
discover_virtual_devs (found_devices);
/* Return NULL if no devices were found. */
if (found_devices->len == 0) {
g_ptr_array_free (found_devices, TRUE);
return NULL;
}
tmparray = g_ptr_array_new ();
/* Check each device against each driver, temporarily storing successfully
* discovered devices in a GPtrArray. */
while ((udev = devs[i++]) != NULL) {
struct fp_dscv_dev *ddev = discover_usb_dev(udev);
if (!ddev)
continue;
/* discover_usb_dev() doesn't hold a reference to the udev,
* so increase the reference for ddev to hold this ref */
libusb_ref_device(udev);
g_ptr_array_add (tmparray, (gpointer) ddev);
}
libusb_free_device_list(devs, 1);
/* Convert our temporary array into a standard NULL-terminated pointer
* array. */
g_ptr_array_add (tmparray, NULL);
return (struct fp_dscv_dev **) g_ptr_array_free (tmparray, FALSE);
g_ptr_array_add (found_devices, NULL);
return (struct fp_dscv_dev **) g_ptr_array_free (found_devices, FALSE);
}
/**