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-rw-r--r--src/org/traccar/protocol/CalAmpProtocolDecoder.java240
1 files changed, 240 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/CalAmpProtocolDecoder.java b/src/org/traccar/protocol/CalAmpProtocolDecoder.java
new file mode 100644
index 000000000..7850de1ca
--- /dev/null
+++ b/src/org/traccar/protocol/CalAmpProtocolDecoder.java
@@ -0,0 +1,240 @@
+package org.traccar.protocol;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.Properties;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelEvent;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.channel.Channels;
+import org.jboss.netty.channel.MessageEvent;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.database.DataManager;
+import org.traccar.helper.Log;
+import org.traccar.model.ExtendedInfoFormatter;
+import org.traccar.model.Position;
+
+public class CalAmpProtocolDecoder extends BaseProtocolDecoder {
+
+ public CalAmpProtocolDecoder(DataManager dataManager, String protocol, Properties properties) {
+ super(dataManager, protocol, properties);
+ }
+
+ private static final int MSG_NULL = 0;
+ private static final int MSG_ACK = 1;
+ private static final int MSG_EVENT_REPORT = 2;
+ private static final int MSG_ID_REPORT = 3;
+ private static final int MSG_USER_DATA = 4;
+ private static final int MSG_APP_DATA = 5;
+ private static final int MSG_CONFIG = 6;
+ private static final int MSG_UNIT_REQUEST = 7;
+ private static final int MSG_LOCATE_REPORT = 8;
+ private static final int MSG_USER_DATA_ACC = 9;
+ private static final int MSG_MINI_EVENT_REPORT = 10;
+ private static final int MSG_MINI_USER_DATA = 11;
+
+ private static final int SERVICE_UNACKNOWLEDGED = 0;
+ private static final int SERVICE_ACKNOWLEDGED = 1;
+ private static final int SERVICE_RESPONSE = 2;
+
+ @Override
+ public void handleUpstream(
+ ChannelHandlerContext ctx, ChannelEvent evt)
+ throws Exception {
+
+ if (!(evt instanceof MessageEvent)) {
+ ctx.sendUpstream(evt);
+ return;
+ }
+
+ MessageEvent e = (MessageEvent) evt;
+ Object decodedMessage = decode(ctx, e.getChannel(), e.getMessage(), e.getRemoteAddress());
+ if (decodedMessage != null) {
+ Channels.fireMessageReceived(ctx, decodedMessage, e.getRemoteAddress());
+ }
+ }
+
+ private void sendResponse(Channel channel, SocketAddress remoteAddress, int type, int index, int result) {
+ if (channel != null) {
+ ChannelBuffer response = ChannelBuffers.directBuffer(10);
+ response.writeByte(SERVICE_RESPONSE);
+ response.writeByte(MSG_ACK);
+ response.writeShort(index);
+ response.writeByte(type);
+ response.writeByte(result);
+ response.writeByte(0);
+ response.writeMedium(0);
+ channel.write(response, remoteAddress);
+ }
+ }
+
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, Object msg, SocketAddress remoteAddress)
+ throws Exception {
+
+ ChannelBuffer buf = (ChannelBuffer) msg;
+
+ Long deviceId = null;
+
+ // Check options header
+ if ((buf.getByte(buf.readerIndex()) & 0x80) != 0) {
+
+ int content = buf.readUnsignedByte();
+
+ // Identifier
+ if ((content & 0x01) != 0) {
+
+ // Read identifier
+ int length = buf.readUnsignedByte();
+ long id = 0;
+ for (int i = 0; i < length; i++) {
+ int b = buf.readUnsignedByte();
+ id = id * 10 + (b >> 4);
+ if ((b & 0xf) != 0xf) {
+ id = id * 10 + (b & 0xf);
+ }
+ }
+
+ // Find device in database
+ String stringId = String.valueOf(id);
+ try {
+ deviceId = getDataManager().getDeviceByImei(stringId).getId();
+ } catch(Exception error) {
+ Log.warning("Unknown device - " + stringId);
+ }
+
+ }
+
+ // Identifier type
+ if ((content & 0x02) != 0) {
+ buf.skipBytes(buf.readUnsignedByte());
+ }
+
+ // Authentication
+ if ((content & 0x04) != 0) {
+ buf.skipBytes(buf.readUnsignedByte());
+ }
+
+ // Routing
+ if ((content & 0x08) != 0) {
+ buf.skipBytes(buf.readUnsignedByte());
+ }
+
+ // Forwarding
+ if ((content & 0x10) != 0) {
+ buf.skipBytes(buf.readUnsignedByte());
+ }
+
+ // Responce redirection
+ if ((content & 0x20) != 0) {
+ buf.skipBytes(buf.readUnsignedByte());
+ }
+
+ }
+
+ // Unidentified device
+ if (deviceId == null) {
+ Log.warning("Unknown device");
+ return null;
+ }
+
+ int service = buf.readUnsignedByte();
+ int type = buf.readUnsignedByte();
+ int index = buf.readUnsignedShort();
+
+ // Send acknowledgement
+ if (service == SERVICE_ACKNOWLEDGED) {
+ sendResponse(channel, remoteAddress, type, index, 0);
+ }
+
+ if (type == MSG_EVENT_REPORT ||
+ type == MSG_LOCATE_REPORT ||
+ type == MSG_MINI_EVENT_REPORT) {
+
+ // Create new position
+ Position position = new Position();
+ position.setDeviceId(deviceId);
+ ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("calamp");
+
+ // Location data
+ position.setTime(new Date(buf.readUnsignedInt() * 1000));
+ if (type != MSG_MINI_EVENT_REPORT) {
+ buf.readUnsignedInt(); // fix time
+ }
+ position.setLatitude(buf.readInt() * 0.0000001);
+ position.setLongitude(buf.readInt() * 0.0000001);
+ if (type != MSG_MINI_EVENT_REPORT) {
+ position.setAltitude(buf.readInt() * 0.01);
+ position.setSpeed(buf.readUnsignedInt() * 0.0194384449); // cm/s
+ }
+ position.setCourse((double) buf.readShort());
+ if (type == MSG_MINI_EVENT_REPORT) {
+ position.setAltitude(0.0);
+ position.setSpeed(buf.readUnsignedByte() * 0.539957); // km/h
+ }
+
+ // Fix status
+ if (type == MSG_MINI_EVENT_REPORT) {
+ extendedInfo.set("satellites", buf.getUnsignedByte(buf.readerIndex()) & 0xf);
+ position.setValid((buf.readUnsignedByte() & 0x20) == 0);
+ } else {
+ extendedInfo.set("satellites", buf.readUnsignedByte());
+ position.setValid((buf.readUnsignedByte() & 0x08) == 0);
+ }
+
+ if (type != MSG_MINI_EVENT_REPORT) {
+
+ // Carrier
+ extendedInfo.set("carrier", buf.readUnsignedShort());
+
+ // Cell signal
+ extendedInfo.set("gsm", buf.readShort());
+
+ }
+
+ // Modem state
+ extendedInfo.set("modem", buf.readUnsignedByte());
+
+ // HDOP
+ if (type != MSG_MINI_EVENT_REPORT) {
+ extendedInfo.set("hdop", buf.readUnsignedByte());
+ }
+
+ // Inputs
+ extendedInfo.set("input", buf.readUnsignedByte());
+
+ // Unit status
+ if (type != MSG_MINI_EVENT_REPORT) {
+ extendedInfo.set("status", buf.readUnsignedByte());
+ }
+
+ // Event code and status
+ if (type == MSG_EVENT_REPORT || type == MSG_MINI_EVENT_REPORT) {
+ extendedInfo.set("event", buf.readUnsignedByte());
+ }
+
+ // Accumulators
+ /*int accCount = buf.readUnsignedByte();
+ int accType = accCount >> 6;
+ accCount &= 0x3f;
+
+ if (accType == 1) {
+ buf.readUnsignedInt(); // threshold
+ buf.readUnsignedInt(); // mask
+ }
+
+ for (int i = 0; i < accCount; i++) {
+ extendedInfo.set("acc" + i, buf.readUnsignedInt());
+ }*/
+
+ position.setExtendedInfo(extendedInfo.toString());
+ return position;
+
+ }
+
+ return null;
+ }
+
+}