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authorAnton Tananaev <anton.tananaev@gmail.com>2019-03-31 22:35:39 -0700
committerAnton Tananaev <anton.tananaev@gmail.com>2019-03-31 22:35:39 -0700
commit59416923dcb3a756eaf532cc4259f2f6625c0762 (patch)
tree9082dae6616deac8fda432b7bfd80e4a52b6d9dc /src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java
parent79a129dd6327d932133d6b9a50190d3f4927bff9 (diff)
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Convert project to gradle
Diffstat (limited to 'src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java')
-rw-r--r--src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java171
1 files changed, 171 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java b/src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java
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+++ b/src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2016 - 2018 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 io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DataConverter;
+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 java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class At2000ProtocolDecoder extends BaseProtocolDecoder {
+
+ private static final int BLOCK_LENGTH = 16;
+
+ public At2000ProtocolDecoder(Protocol 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 sendRequest(Channel channel) {
+ if (channel != null) {
+ ByteBuf response = Unpooled.buffer(BLOCK_LENGTH);
+ response.writeByte(MSG_TRACK_REQUEST);
+ response.writeMedium(0);
+ response.writerIndex(BLOCK_LENGTH);
+ channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+ }
+ }
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ByteBuf buf = (ByteBuf) msg;
+
+ if (buf.getUnsignedByte(buf.readerIndex()) == 0x01) {
+ buf.readUnsignedByte(); // codec id
+ }
+
+ int type = buf.readUnsignedByte();
+ buf.readUnsignedMediumLE(); // length
+ buf.skipBytes(BLOCK_LENGTH - 1 - 3);
+
+ if (type == MSG_DEVICE_ID) {
+
+ String imei = buf.readSlice(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(
+ DataConverter.parseHex("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;
+ }
+
+ if (buf.capacity() <= BLOCK_LENGTH) {
+ return null; // empty message
+ }
+
+ List<Position> positions = new LinkedList<>();
+
+ byte[] data = new byte[buf.capacity() - BLOCK_LENGTH];
+ buf.readBytes(data);
+ buf = Unpooled.wrappedBuffer(cipher.update(data));
+ try {
+ while (buf.readableBytes() >= 63) {
+
+ Position position = new Position(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ buf.readUnsignedShortLE(); // index
+ buf.readUnsignedShortLE(); // reserved
+
+ position.setValid(true);
+
+ position.setTime(new Date(buf.readLongLE() * 1000));
+
+ position.setLatitude(buf.readFloatLE());
+ position.setLongitude(buf.readFloatLE());
+ position.setAltitude(buf.readFloatLE());
+ position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloatLE()));
+ position.setCourse(buf.readFloatLE());
+
+ buf.readUnsignedIntLE(); // geozone event
+ buf.readUnsignedIntLE(); // io events
+ buf.readUnsignedIntLE(); // geozone value
+ buf.readUnsignedIntLE(); // io values
+ buf.readUnsignedShortLE(); // operator
+
+ position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
+ position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
+
+ position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
+
+ buf.readUnsignedShortLE(); // cid
+ position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+ buf.readUnsignedByte(); // current profile
+
+ position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+ position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte());
+ position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+ positions.add(position);
+
+ }
+ } finally {
+ buf.release();
+ }
+
+ return positions;
+
+ }
+
+ if (type == MSG_DEVICE_ID) {
+ sendRequest(channel);
+ }
+
+ return null;
+ }
+
+}