Added check for MQTT 3.1.1 reserved flag == 0 on connect flags

2014-07-23 00:08:59 +02:00
parent 465d7123f6
commit 8185811188
2 changed files with 27 additions and 1 deletions
@@ -120,6 +120,12 @@ public class ConnectDecoder extends DemuxDecoder {

        //Connection flag
        byte connFlags = in.readByte();
+        if (message.getProcotolVersion() == VERSION_3_1_1) { 
+            if ((connFlags & 0x01) != 0) { //bit(0) of connection flags is != 0
+                throw new CorruptedFrameException("Received a CONNECT with connectionFlags[0(bit)] != 0");
+            }
+        }
+        
        boolean cleanSession = ((connFlags & 0x02) >> 1) == 1 ? true : false;
        boolean willFlag = ((connFlags & 0x04) >> 2) == 1 ? true : false;
        byte willQos = (byte) ((connFlags & 0x18) >> 3);