001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.activemq.transport.protocol; 018 019/** 020 * 021 * 022 */ 023public class MqttProtocolVerifier implements ProtocolVerifier { 024 025 /* (non-Javadoc) 026 * @see org.apache.activemq.broker.transport.protocol.ProtocolVerifier#isProtocol(byte[]) 027 */ 028 @Override 029 public boolean isProtocol(byte[] value) { 030 boolean mqtt311 = value[4] == 77 && // M 031 value[5] == 81 && // Q 032 value[6] == 84 && // T 033 value[7] == 84; // T 034 035 boolean mqtt31 = value[4] == 77 && // M 036 value[5] == 81 && // Q 037 value[6] == 73 && // I 038 value[7] == 115; // s 039 040 return mqtt311 || mqtt31; 041 } 042 043 044 045}