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-rw-r--r--src/org/traccar/protocol/Avl301ProtocolDecoder.java147
1 files changed, 147 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/Avl301ProtocolDecoder.java b/src/org/traccar/protocol/Avl301ProtocolDecoder.java
new file mode 100644
index 000000000..4bc7686e7
--- /dev/null
+++ b/src/org/traccar/protocol/Avl301ProtocolDecoder.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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.jboss.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.model.ExtendedInfoFormatter;
+import org.traccar.model.Position;
+
+import java.util.Calendar;
+import java.util.TimeZone;
+
+public class Avl301ProtocolDecoder extends BaseProtocolDecoder {
+
+ public Avl301ProtocolDecoder(String protocol) {
+ super(protocol);
+ }
+
+ private String readImei(ChannelBuffer buf) {
+ int b = buf.readUnsignedByte();
+ StringBuilder imei = new StringBuilder();
+ imei.append(b & 0x0F);
+ for (int i = 0; i < 7; i++) {
+ b = buf.readUnsignedByte();
+ imei.append((b & 0xF0) >> 4);
+ imei.append(b & 0x0F);
+ }
+ return imei.toString();
+ }
+
+ private static final int MSG_LOGIN = 'L';
+ private static final int MSG_STATUS = 'H';
+ private static final int MSG_GPS_LBS_STATUS = '$';
+
+ private static void sendResponse(Channel channel, int type) {
+ if (channel != null) {
+ ChannelBuffer response = ChannelBuffers.directBuffer(5);
+ response.writeByte('$');
+ response.writeByte(type);
+ response.writeByte('#');
+ response.writeByte('\r'); response.writeByte('\n');
+ channel.write(response);
+ }
+ }
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, Object msg)
+ throws Exception {
+
+ ChannelBuffer buf = (ChannelBuffer) msg;
+
+ buf.skipBytes(1); // header
+ int type = buf.readUnsignedByte();
+ buf.readUnsignedByte(); // length
+
+ if (type == MSG_LOGIN) {
+
+ if (identify(readImei(buf))) {
+ sendResponse(channel, type);
+ }
+
+ } else if (hasDeviceId() && type == MSG_STATUS) {
+
+ sendResponse(channel, type);
+
+ } else if (hasDeviceId() && type == MSG_GPS_LBS_STATUS) {
+
+ // Create new position
+ Position position = new Position();
+ position.setDeviceId(getDeviceId());
+ ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
+
+ // Date and time(6)
+ Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+ time.clear();
+ time.set(Calendar.YEAR, 2000 + buf.readUnsignedByte());
+ time.set(Calendar.MONTH, buf.readUnsignedByte() - 1);
+ time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte());
+ time.set(Calendar.HOUR_OF_DAY, buf.readUnsignedByte());
+ time.set(Calendar.MINUTE, buf.readUnsignedByte());
+ time.set(Calendar.SECOND, buf.readUnsignedByte());
+ position.setTime(time.getTime());
+
+ // GPS length and Satellites count
+ int gpsLength = buf.readUnsignedByte();
+ extendedInfo.set("satellites", gpsLength & 0xf);
+ gpsLength >>= 4;
+
+ //Skip Satellite numbers
+ buf.skipBytes(1);
+
+ // Location
+ double latitude = buf.readUnsignedInt() / 600000.0;
+ double longitude = buf.readUnsignedInt() / 600000.0;
+ position.setSpeed(buf.readUnsignedByte() * 1.0); // kph?
+
+ // Course and flags
+ int union = buf.readUnsignedShort();
+ position.setCourse((double) (union & 0x03FF));
+ position.setValid((union & 0x1000) != 0);
+ if ((union & 0x0400) != 0) latitude = -latitude;
+ if ((union & 0x0800) != 0) longitude = -longitude;
+
+ position.setLatitude(latitude);
+ position.setLongitude(longitude);
+ position.setAltitude(0.0);
+
+ if ((union & 0x4000) != 0) {
+ extendedInfo.set("acc", (union & 0x8000) != 0);
+ }
+
+ extendedInfo.set("lac", buf.readUnsignedShort());
+ extendedInfo.set("cell", buf.readUnsignedMedium());
+ extendedInfo.set("alarm", true);
+ int flags = buf.readUnsignedByte();
+ extendedInfo.set("acc", (flags & 0x2) != 0);
+
+ // TODO parse other flags
+
+ extendedInfo.set("power", buf.readUnsignedByte());
+ extendedInfo.set("gsm", buf.readUnsignedByte());
+
+ position.setExtendedInfo(extendedInfo.toString());
+ return position;
+ }
+
+ return null;
+ }
+
+}