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/*
* Copyright 2023 Anton Tananaev (anton@traccar.org)
*
* 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 org.traccar.handler;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.socket.DatagramChannel;
import io.netty.channel.socket.DatagramPacket;
import org.traccar.forward.NetworkForwarder;
import javax.inject.Inject;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
public class NetworkForwarderHandler extends ChannelInboundHandlerAdapter {
private final int port;
private NetworkForwarder networkForwarder;
public NetworkForwarderHandler(int port) {
this.port = port;
}
@Inject
public void setNetworkForwarder(NetworkForwarder networkForwarder) {
this.networkForwarder = networkForwarder;
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
boolean datagram = ctx.channel() instanceof DatagramChannel;
SocketAddress remoteAddress;
ByteBuf buffer;
if (datagram) {
DatagramPacket message = (DatagramPacket) msg;
remoteAddress = message.recipient();
buffer = message.content();
} else {
remoteAddress = ctx.channel().remoteAddress();
buffer = (ByteBuf) msg;
}
byte[] data = new byte[buffer.readableBytes()];
buffer.getBytes(buffer.readerIndex(), data);
networkForwarder.forward((InetSocketAddress) remoteAddress, port, datagram, data);
super.channelRead(ctx, msg);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
if (!(ctx.channel() instanceof DatagramChannel)) {
networkForwarder.disconnect((InetSocketAddress) ctx.channel().remoteAddress());
}
super.channelInactive(ctx);
}
}
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