Supported device classes that fail sanity checks are now reported with a

slow 'unsupported device' flash, rather than a fast 'freakout' flash.
pull/7/head
Robert Fisk 8 years ago
parent 75b6521b60
commit 7426c396e5

@ -203,25 +203,22 @@ void Downstream_HostUserCallback(USBH_HandleTypeDef *phost, uint8_t id)
//Add other classes here...
}
//Unsupported device classes will cause a slow fault flash.
//This is distinct from the fast freakout flash caused by internal errors or attacks.
default:
//We consider supported classes that fail their approval checks to also be unsupported devices.
if (newActiveClass == COMMAND_CLASS_INTERFACE)
{
USB_Host_Disconnect();
LED_Fault_SetBlinkRate(LED_SLOW_BLINK_RATE);
DownstreamState = STATE_ERROR;
return;
}
//If the new device has failed its 'approval' checks, we are sufficiently freaked out.
if (newActiveClass == COMMAND_CLASS_INTERFACE)
{
DOWNSTREAM_STATEMACHINE_FREAKOUT;
return;
}
//If we already configured a device class, we cannot change to a different one without rebooting.
//This blocks some BadUSB attacks.
//This blocks 'hidden device' BadUSB attacks.
if ((ConfiguredDeviceClass != COMMAND_CLASS_INTERFACE) &&
(ConfiguredDeviceClass != newActiveClass))
{

Loading…
Cancel
Save