From 04f33e6ba29b3a73a65b081d2a8b6ac3e0e0ebee Mon Sep 17 00:00:00 2001 From: Anton Tananaev Date: Thu, 24 Nov 2016 15:52:52 +1300 Subject: Implement Teltonika AT200 protocol --- src/org/traccar/protocol/At2000FrameDecoder.java | 57 +++++++++ src/org/traccar/protocol/At2000Protocol.java | 42 +++++++ .../traccar/protocol/At2000ProtocolDecoder.java | 134 +++++++++++++++++++++ 3 files changed, 233 insertions(+) create mode 100644 src/org/traccar/protocol/At2000FrameDecoder.java create mode 100644 src/org/traccar/protocol/At2000Protocol.java create mode 100644 src/org/traccar/protocol/At2000ProtocolDecoder.java (limited to 'src/org') diff --git a/src/org/traccar/protocol/At2000FrameDecoder.java b/src/org/traccar/protocol/At2000FrameDecoder.java new file mode 100644 index 000000000..d0be3f5f4 --- /dev/null +++ b/src/org/traccar/protocol/At2000FrameDecoder.java @@ -0,0 +1,57 @@ +/* + * Copyright 2016 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.protocol; + +import org.jboss.netty.buffer.ChannelBuffer; +import org.jboss.netty.channel.Channel; +import org.jboss.netty.channel.ChannelHandlerContext; +import org.jboss.netty.handler.codec.frame.FrameDecoder; + +public class At2000FrameDecoder extends FrameDecoder { + + private static final int BLOCK_LENGTH = 16; + + private boolean firstPacket = true; + + @Override + protected Object decode( + ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception { + + if (buf.readableBytes() < 5) { + return null; + } + + int length; + if (firstPacket) { + firstPacket = false; + length = buf.getUnsignedMedium(buf.readerIndex() + 2); + } else { + length = buf.getUnsignedMedium(buf.readerIndex() + 1); + } + + length += BLOCK_LENGTH; + if (length % BLOCK_LENGTH != 0) { + length = (length / BLOCK_LENGTH + 1) * BLOCK_LENGTH; + } + + if (buf.readableBytes() >= length) { + return buf.readBytes(length); + } + + return null; + } + +} diff --git a/src/org/traccar/protocol/At2000Protocol.java b/src/org/traccar/protocol/At2000Protocol.java new file mode 100644 index 000000000..418619cb4 --- /dev/null +++ b/src/org/traccar/protocol/At2000Protocol.java @@ -0,0 +1,42 @@ +/* + * Copyright 2016 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.protocol; + +import org.jboss.netty.bootstrap.ServerBootstrap; +import org.jboss.netty.channel.ChannelPipeline; +import org.traccar.BaseProtocol; +import org.traccar.TrackerServer; + +import java.util.List; + +public class At2000Protocol extends BaseProtocol { + + public At2000Protocol() { + super("at2000"); + } + + @Override + public void initTrackerServers(List serverList) { + serverList.add(new TrackerServer(new ServerBootstrap(), getName()) { + @Override + protected void addSpecificHandlers(ChannelPipeline pipeline) { + pipeline.addLast("frameDecoder", new At2000FrameDecoder()); + pipeline.addLast("objectDecoder", new At2000ProtocolDecoder(At2000Protocol.this)); + } + }); + } + +} diff --git a/src/org/traccar/protocol/At2000ProtocolDecoder.java b/src/org/traccar/protocol/At2000ProtocolDecoder.java new file mode 100644 index 000000000..17da0eef7 --- /dev/null +++ b/src/org/traccar/protocol/At2000ProtocolDecoder.java @@ -0,0 +1,134 @@ +/* + * Copyright 2016 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.protocol; + +import org.jboss.netty.buffer.ChannelBuffer; +import org.jboss.netty.buffer.ChannelBuffers; +import org.jboss.netty.channel.Channel; +import org.traccar.BaseProtocolDecoder; +import org.traccar.DeviceSession; +import org.traccar.helper.UnitsConverter; +import org.traccar.model.Position; + +import javax.crypto.Cipher; +import javax.crypto.spec.IvParameterSpec; +import javax.crypto.spec.SecretKeySpec; +import javax.xml.bind.DatatypeConverter; +import java.net.SocketAddress; +import java.nio.ByteOrder; +import java.nio.charset.StandardCharsets; +import java.util.Date; + +public class At2000ProtocolDecoder extends BaseProtocolDecoder { + + private static final int BLOCK_LENGTH = 16; + + public At2000ProtocolDecoder(At2000Protocol protocol) { + super(protocol); + } + + public static final int MSG_ACKNOWLEDGEMENT = 0x00; + public static final int MSG_DEVICE_ID = 0x01; + public static final int MSG_TRACK_REQUEST = 0x88; + public static final int MSG_TRACK_RESPONSE = 0x89; + public static final int MSG_SESSION_END = 0x0c; + + private Cipher cipher; + + private static void sendResponse(Channel channel) { + if (channel != null) { + ChannelBuffer response = ChannelBuffers.directBuffer(BLOCK_LENGTH); + response.writeByte(MSG_ACKNOWLEDGEMENT); + response.writeMedium(1); + response.writeByte(0x00); // success + response.writerIndex(BLOCK_LENGTH); + channel.write(response); + } + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ChannelBuffer buf = (ChannelBuffer) msg; + + if (buf.getUnsignedByte(buf.readerIndex()) == 0x01) { + buf.readUnsignedByte(); // codec id + } + + int type = buf.readUnsignedByte(); + buf.readUnsignedMedium(); // length + buf.skipBytes(BLOCK_LENGTH - 1 - 3); + + if (type == MSG_DEVICE_ID) { + + String imei = buf.readBytes(15).toString(StandardCharsets.US_ASCII); + if (getDeviceSession(channel, remoteAddress, imei) != null) { + + byte[] iv = new byte[BLOCK_LENGTH]; + buf.readBytes(iv); + IvParameterSpec ivSpec = new IvParameterSpec(iv); + + SecretKeySpec keySpec = new SecretKeySpec( + DatatypeConverter.parseHexBinary("000102030405060708090a0b0c0d0e0f"), "AES"); + + cipher = Cipher.getInstance("AES/CBC/NoPadding"); + cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec); + + byte[] data = new byte[BLOCK_LENGTH]; + buf.readBytes(data); + cipher.update(data); + + } + + } else if (type == MSG_TRACK_RESPONSE) { + + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress); + if (deviceSession == null) { + return null; + } + + Position position = new Position(); + position.setProtocol(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + byte[] data = new byte[buf.capacity() - BLOCK_LENGTH]; + buf.readBytes(data); + buf = ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, cipher.update(data)); + + buf.readUnsignedShort(); // index + buf.readUnsignedShort(); // reserved + + position.setValid(true); + + position.setTime(new Date(buf.readLong() * 1000)); + + position.setLatitude(buf.readFloat()); + position.setLongitude(buf.readFloat()); + position.setAltitude(buf.readFloat()); + position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloat())); + position.setCourse(buf.readFloat()); + + return position; + + } + + sendResponse(channel); + + return null; + } + +} -- cgit v1.2.3