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HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5
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/*
* Copyright 2019-present HiveMQ GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hivemq.mqtt.handler.auth;
import com.google.common.annotations.VisibleForTesting;
import com.hivemq.bootstrap.ClientConnectionContext;
import com.hivemq.extension.sdk.api.annotations.NotNull;
import com.hivemq.mqtt.handler.connack.MqttConnacker;
import com.hivemq.mqtt.message.auth.AUTH;
import com.hivemq.mqtt.message.disconnect.DISCONNECT;
import com.hivemq.mqtt.message.mqtt5.Mqtt5UserProperties;
import com.hivemq.mqtt.message.reason.Mqtt5ConnAckReasonCode;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import javax.inject.Inject;
import javax.inject.Singleton;
/**
* @author Georg Held
*/
@ChannelHandler.Sharable
@Singleton
public class AuthInProgressMessageHandler extends ChannelInboundHandlerAdapter {
@NotNull
private static final String DISCONNECT_LOG_MESSAGE = "The client with id %s and IP {} sent a message other than " +
"AUTH or DISCONNECT during enhanced authentication. " +
"This is not allowed. Disconnecting client.";
private final @NotNull MqttConnacker connacker;
@VisibleForTesting
@Inject
public AuthInProgressMessageHandler(final @NotNull MqttConnacker connacker) {
this.connacker = connacker;
}
@Override
public void channelRead(final @NotNull ChannelHandlerContext ctx, final @NotNull Object msg) throws Exception {
if (msg instanceof AUTH || msg instanceof DISCONNECT) {
super.channelRead(ctx, msg);
return;
}
final String reasonString =
"Client must not send a message other than AUTH or DISCONNECT during enhanced authentication";
final ClientConnectionContext clientConnectionContext = ClientConnectionContext.of(ctx.channel());
connacker.connackError(ctx.channel(),
String.format(DISCONNECT_LOG_MESSAGE, clientConnectionContext.getClientId()),
"Sent message other than AUTH or DISCONNECT during enhanced authentication",
Mqtt5ConnAckReasonCode.PROTOCOL_ERROR,
reasonString,
Mqtt5UserProperties.NO_USER_PROPERTIES,
true);
}
}