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authorAnton Tananaev <anton.tananaev@gmail.com>2021-04-11 12:31:58 -0700
committerAnton Tananaev <anton.tananaev@gmail.com>2021-04-11 12:31:58 -0700
commitd492aeec2ab8ba53725d91e99140dc2774f7e3f1 (patch)
treec2accb90d8d990519e8e20eb44fcd05ce762b60d /src/main/java/org/traccar/protocol/Gs100ProtocolDecoder.java
parent2099230503370be87b893287e264aa200d0d930f (diff)
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Implement GS100 protocol
Diffstat (limited to 'src/main/java/org/traccar/protocol/Gs100ProtocolDecoder.java')
-rw-r--r--src/main/java/org/traccar/protocol/Gs100ProtocolDecoder.java133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/Gs100ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gs100ProtocolDecoder.java
new file mode 100644
index 000000000..d55773785
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gs100ProtocolDecoder.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright 2021 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.ByteBufUtil;
+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.BcdUtil;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedList;
+import java.util.List;
+
+public class Gs100ProtocolDecoder extends BaseProtocolDecoder {
+
+ public Gs100ProtocolDecoder(Protocol protocol) {
+ super(protocol);
+ }
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ByteBuf buf = (ByteBuf) msg;
+
+ String header = buf.readCharSequence(2, StandardCharsets.US_ASCII).toString();
+
+ if (header.equals("GL")) {
+
+ buf.skipBytes(1);
+ String imei = buf.readCharSequence(buf.readUnsignedByte(), StandardCharsets.US_ASCII).toString();
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+
+ if (channel != null && deviceSession != null) {
+ ByteBuf response = Unpooled.copiedBuffer("GS100", StandardCharsets.US_ASCII);
+ channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+ }
+
+ return null;
+
+ } else {
+
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+ if (deviceSession == null) {
+ return null;
+ }
+
+ List<Position> positions = new LinkedList<>();
+
+ int count = buf.readUnsignedByte();
+ for (int i = 0; i < count; i++) {
+
+ int endIndex = buf.readUnsignedByte() + buf.readerIndex();
+
+ Position position = new Position(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ int status = buf.readUnsignedMedium();
+ position.set(Position.KEY_STATUS, status);
+
+ if (BitUtil.check(status, 8 + 8 + 7)) {
+
+ DateBuilder dateBuilder = new DateBuilder()
+ .setHour(BcdUtil.readInteger(buf, 2))
+ .setMinute(BcdUtil.readInteger(buf, 2))
+ .setSecond(BcdUtil.readInteger(buf, 2))
+ .setDay(BcdUtil.readInteger(buf, 2))
+ .setMonth(BcdUtil.readInteger(buf, 2))
+ .setYear(BcdUtil.readInteger(buf, 2));
+ position.setTime(dateBuilder.getDate());
+
+ position.setValid(true);
+
+ String coordinates = ByteBufUtil.hexDump(buf.readSlice(9));
+ position.setLongitude(Integer.parseInt(coordinates.substring(0, 3))
+ + Integer.parseInt(coordinates.substring(3, 9)) * 0.0001 / 60);
+ position.setLatitude(Integer.parseInt(coordinates.substring(10, 12))
+ + Integer.parseInt(coordinates.substring(12, 18)) * 0.0001 / 60);
+ int flags = Integer.parseInt(coordinates.substring(9, 10), 16);
+ if (!BitUtil.check(flags, 4)) {
+ position.setLongitude(-position.getLongitude());
+ }
+ if (!BitUtil.check(flags, 3)) {
+ position.setLatitude(-position.getLatitude());
+ }
+
+ String other = ByteBufUtil.hexDump(buf.readSlice(4));
+ position.setSpeed(Integer.parseInt(other.substring(0, 5)));
+ position.setCourse(Integer.parseInt(other.substring(5, 8)));
+
+ }
+
+ positions.add(position);
+
+ buf.readerIndex(endIndex);
+
+ }
+
+ if (channel != null) {
+ ByteBuf response = Unpooled.buffer();
+ response.writeCharSequence("GS100", StandardCharsets.US_ASCII);
+ response.writeByte(count);
+ channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+ }
+
+ return positions.isEmpty() ? null : positions;
+
+ }
+ }
+
+}