ignore Drw data packets that are too short to be valid

2024-05-03 18:10:42 +02:00
parent a93564cd11
commit c81d7d4182
2 changed files with 14 additions and 0 deletions
@@ -135,6 +135,13 @@ export const createResponseForControlCommand = (session: Session, dv: DataView):

 const deal_with_data = (session: Session, dv: DataView) => {
  const pkt_len = dv.add(2).readU16();
+
+  // 12 equals start of header (0x8) + header length (0x4)
+  if (pkt_len < 12) {
+    logger.debug("Got a short Drw packet, ignoring");
+    return;
+  }
+
  const FRAME_HEADER = [0x55, 0xaa, 0x15, 0xa8];
  const m_hdr = dv.add(8).readByteArray(4);
  const pkt_id = dv.add(6).readU16();