Constant acceleration detector now blocks mouse movement well before

causing a full lockout

Upstream/Inc/build_config.h

@@ -41,30 +41,28 @@
 
 //Configure mouse bot detection here:
 #ifdef CONFIG_MOUSE_BOT_DETECT_ENABLED
-    //-----------------------------------------------------------
-    //Adjust these thresholds first to tune mouse bot detection. Lower values = more sensitive
-    #define MOUSE_BOTDETECT_JUMP_VELOCITY_THRESHOLD         20      //Varies by mouse. Most short jumps are <= 10 velocity
-    #define MOUSE_BOTDETECT_LOCKOUT_CONSTANT_ACCEL_LIMIT    30      //10 is ok for most mice. But some mice (or users!) generate longer sequences.
-    #define MOUSE_BOTDETECT_LOCKOUT_CONSTANT_ACCEL_CREDIT   80      //Non-constant-acceleration movements can build a credit that will be used before hitting the ACCEL_COUNT limit above. Handy for mice or users that exhibit constant velocity characteristics mid-movement.
-    #define MOUSE_BOTDETECT_LOCKOUT_JIGGLE_BIN_THRESHOLD    4
-    //-----------------------------------------------------------
-
     #define MOUSE_BOTDETECT_VELOCITY_MULTIPLIER             10
-    #define MOUSE_BOTDETECT_MOVEMENT_STOP_PERIODS           5
 
     //Jump detection stuff
-    #define MOUSE_BOTDETECT_JUMP_MINIMUM_PERIODS            4
+    #define MOUSE_BOTDETECT_JUMP_VELOCITY_THRESHOLD         20      //Varies by mouse. Most short jumps are <= 10 velocity
+    #define MOUSE_BOTDETECT_JUMP_PERIODS                    4
 
     //Constant acceleration detection stuff
-    #define MOUSE_BOTDETECT_VELOCITY_RESET_TIMEOUT_MS       4000
+    #define MOUSE_BOTDETECT_CONSTANT_ACCEL_LOCKOUT          100     //Lock when constant acceleration counter reaches this number
+    #define MOUSE_BOTDETECT_CONSTANT_ACCEL_STOP             10      //Block mouse movements when counter is above this value
+    #define MOUSE_BOTDETECT_CONSTANT_ACCEL_CREDIT           100     //Non-constant-acceleration movements can build a credit that will be used before hitting the limits above. Handy for mice or users that exhibit constant velocity characteristics mid-movement.
+    #define MOUSE_BOTDETECT_VELOCITY_RESET_TIMEOUT_MS       3000    //Reset constant acceleration counter when mouse stops for this time
+
     #define MOUSE_BOTDETECT_VELOCITY_HISTORY_SIZE           12
     #define MOUSE_BOTDETECT_VELOCITY_MATCH_BASE             256
     #define MOUSE_BOTDETECT_VELOCITY_MATCH_ERROR            6
 
     //Jiggle detection stuff
+    #define MOUSE_BOTDETECT_JIGGLE_STOP_PERIODS             10
     #define MOUSE_BOTDETECT_JIGGLE_BIN_WIDTH_MS             20      //20ms per bin
     #define MOUSE_BOTDETECT_JIGGLE_BIN_COUNT                50      //50 bins at 20ms = 1 sec coverage, wrapped
     #define MOUSE_BOTDETECT_JIGGLE_BIN_DIVIDER              4
+    #define MOUSE_BOTDETECT_LOCKOUT_JIGGLE_BIN_THRESHOLD    4
 #endif
 
 

Upstream/Src/upstream_hid_botdetect.c

@@ -64,7 +64,7 @@ volatile LockoutStateTypeDef    LockoutState = LOCKOUT_STATE_INACTIVE;
     //Constant acceleration detection stuff
     uint16_t    MouseVelocityHistory[MOUSE_BOTDETECT_VELOCITY_HISTORY_SIZE] = {0};
     int32_t     PreviousSmoothedAcceleration    = 0;
-    int8_t      ConstantAccelerationCounter     = 0;
+    int32_t     ConstantAccelerationCounter     = 0;
 
     //Jiggle detection stuff
     uint8_t     MouseStopIntervalBinDrainDivideCount    = 0;
@@ -427,8 +427,8 @@ void Upstream_HID_BotDetectMouse(uint8_t* mouseInData)
     }
 
 
-    //Did the mouse stop moving briefly?
-    if (moveDelay > ((MOUSE_BOTDETECT_MOVEMENT_STOP_PERIODS * HID_FS_BINTERVAL) - (HID_FS_BINTERVAL / 2)))
+    //Jiggle detection: did the mouse stop moving?
+    if (moveDelay > ((MOUSE_BOTDETECT_JIGGLE_STOP_PERIODS * HID_FS_BINTERVAL) - (HID_FS_BINTERVAL / 2)))
     {
         //Is this the start of a new movement?
         if (velocity != 0)
@@ -458,12 +458,17 @@ void Upstream_HID_BotDetectMouse(uint8_t* mouseInData)
                 }
             }
         }
+    }
+
 
-        //Jump detection: was a movement in progress?
+    //Jump detection: did the mouse stop moving briefly?
+    if (moveDelay > ((MOUSE_BOTDETECT_JUMP_PERIODS * HID_FS_BINTERVAL) - (HID_FS_BINTERVAL / 2)))
+    {
+        //Was a movement in progress?
         if (JumpMouseIsMoving)
         {
             JumpMouseIsMoving = 0;
-            if ((LastMouseMoveTime - JumpLastMouseMoveBeginTime) < ((MOUSE_BOTDETECT_JUMP_MINIMUM_PERIODS * HID_FS_BINTERVAL) - (HID_FS_BINTERVAL / 2)))
+            if ((LastMouseMoveTime - JumpLastMouseMoveBeginTime) < ((MOUSE_BOTDETECT_JUMP_PERIODS * HID_FS_BINTERVAL) - (HID_FS_BINTERVAL / 2)))
             {
                 if (ConstantAccelerationCounter >= 0)           //Ignore jumps if ConstantAccelerationCounter is negative -> a human is using the mouse
                 {
@@ -513,14 +518,19 @@ void Upstream_HID_BotDetectMouse(uint8_t* mouseInData)
                 ((PreviousSmoothedAcceleration - smoothedAccelerationMatchError) <= newSmoothedAcceleration))
             {
                 ConstantAccelerationCounter++;
-                if (ConstantAccelerationCounter > MOUSE_BOTDETECT_LOCKOUT_CONSTANT_ACCEL_LIMIT)
+                if (ConstantAccelerationCounter > MOUSE_BOTDETECT_CONSTANT_ACCEL_LOCKOUT)
                 {
                     Upstream_HID_BotDetectMouse_DoLockout();
                 }
+                else if (ConstantAccelerationCounter >= MOUSE_BOTDETECT_CONSTANT_ACCEL_STOP)        //Stop mouse movement if it looks suspiciously constant
+                {
+                    mouseInData[1] = 0;
+                    mouseInData[2] = 0;
+                }
             }
             else
             {
-                if (ConstantAccelerationCounter > -MOUSE_BOTDETECT_LOCKOUT_CONSTANT_ACCEL_CREDIT) ConstantAccelerationCounter--;
+                if (ConstantAccelerationCounter > -MOUSE_BOTDETECT_CONSTANT_ACCEL_CREDIT) ConstantAccelerationCounter--;
             }
             PreviousSmoothedAcceleration = newSmoothedAcceleration;