[radio] update isFilterMaskValid()

src/src/radio.c

@@ -675,13 +675,17 @@ static bool isFilterMaskValid(uint8_t mask)
      * Case 3: We don't have either the destination addressing field or destination PanId
      *         in the received packet to determine if the dest address and dest pan match.
      */
-    if (
-        // Case 1
-        ((mask & RADIO_BCAST_PANID_FILTER_MASK) || (mask & RADIO_BCAST_ADDR_FILTER_MASK)) ||
-        // Case 2
-        ((mask & 0x0F) == (mask >> 4)) ||
-        // Case 3
-        (((mask & 0x0F) == 0) || ((mask >> 4) == 0)))
+    if (((mask & RADIO_BCAST_PANID_FILTER_MASK) || (mask & RADIO_BCAST_ADDR_FILTER_MASK)) || // Case 1
+        // Find any non-broadcast PAN ID match and get ready to compare it
+        ((((mask & (RADIO_INDEX0_PANID_FILTER_MASK | RADIO_INDEX1_PANID_FILTER_MASK | RADIO_INDEX2_PANID_FILTER_MASK))
+           >> RADIO_PANID_FILTER_SHIFT)
+          &
+          // ...To see if it coincides with any address matches for same IID
+          (RADIO_GET_ADDR_FILTER_MASK(mask) >> RADIO_ADDR_FILTER_SHIFT))
+         != 0)
+        ||                                                                                        // Case 2
+        (((RADIO_GET_PANID_FILTER_MASK(mask)) == 0) || ((RADIO_GET_ADDR_FILTER_MASK(mask)) == 0)) // Case 3
+    )
     {
         valid = true;
     }