2 files changed, 399 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/G1rusProtocol.java b/src/main/java/org/traccar/protocol/G1rusProtocol.java
new file mode 100644
index 000000000..0d77a8add
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/G1rusProtocol.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.config.Config;
+
+import javax.inject.Inject;
+
+public class G1rusProtocol extends BaseProtocol {
+
+    @Inject
+    public G1rusProtocol(Config config) {
+        addServer(new TrackerServer(config, getName(), false) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline, Config config) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new G1rusProtocolDecoder(G1rusProtocol.this));
+            }
+        });
+    }
+}
diff --git a/src/main/java/org/traccar/protocol/G1rusProtocolDecoder.java b/src/main/java/org/traccar/protocol/G1rusProtocolDecoder.java
new file mode 100644
index 000000000..b1b7230e1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/G1rusProtocolDecoder.java
@@ -0,0 +1,375 @@
+package org.traccar.protocol;
+
+import com.google.common.primitives.Ints;
+import com.google.common.primitives.Longs;
+import com.google.common.primitives.Shorts;
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Protocol;
+import org.traccar.model.Position;
+import org.traccar.session.ConnectionManager;
+import org.traccar.session.DeviceSession;
+
+import java.net.SocketAddress;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class G1rusProtocolDecoder extends BaseProtocolDecoder {
+    public G1rusProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ConnectionManager.class);
+
+    /* Constants */
+    private static final int G1RUS_HEAD_TAIL = 0xF8;
+
+    private static final int G1RUS_TYPE_HEARTBEAT = 0;
+
+    private static final int G1RUS_TYPE_BCD_MASK = 0b00111111;
+    private static final int G1RUS_TYPE_REGULAR = 1;
+    private static final int G1RUS_TYPE_SMS_FORWARD = 2;
+    private static final int G1RUS_TYPE_SERIAL_PASS_THROUGH = 3;
+    private static final int G1RUS_TYPE_MIXED = 4;
+
+    private static final int G1RUS_TYPE_EVENT_MASK = 0b01000000;
+    private static final int G1RUS_TYPE_NON_EVENT = 0;
+    private static final int G1RUS_TYPE_EVENT = 1;
+
+    private static final int G1RUS_TYPE_IMEI_MASK = 0b10000000;
+    private static final int G1RUS_TYPE_IMEI_LONG = 0;
+    private static final int G1RUS_TYPE_IMEI_SHORT = 1;
+
+    private static final int G1RUS_DATA_SYS_MASK = 0b00000001;
+    private static final int G1RUS_DATA_GPS_MASK = 0b00000010;
+    private static final int G1RUS_DATA_GSM_MASK = 0b00000100;
+    private static final int G1RUS_DATA_COT_MASK = 0b00001000;
+    private static final int G1RUS_DATA_ADC_MASK = 0b00010000;
+    private static final int G1RUS_DATA_DTT_MASK = 0b00100000;
+    /* Reserved */
+    private static final int G1RUS_DATA_ETD_MASK = 0b10000000;
+
+    private static final int G1RUS_GPS_SIGN_MASK = 0b00000001;
+    private static final int G1RUS_GPS_POS_MASK  = 0b00000010;
+    private static final int G1RUS_GPS_SPD_MASK  = 0b00000100;
+    private static final int G1RUS_GPS_AZTH_MASK = 0b00001000;
+    private static final int G1RUS_GPS_ALT_MASK  = 0b00010000;
+    private static final int G1RUS_GPS_HDOP_MASK = 0b00100000;
+    private static final int G1RUS_GPS_VDOP_MASK = 0b01000000;
+    private static final int G1RUS_GPS_STAT_MASK = 0b10000000;
+
+    private static final int G1RUS_ADC_DATA_MASK = 0b0000111111111111;
+
+    private static final int G1RUS_ESCAPE_CHAR = 0x1B;
+
+
+    private short readUnsignedByteUnescaped(ByteBuf buf) {
+        short first = buf.readUnsignedByte();
+        if (first != G1RUS_ESCAPE_CHAR) {
+            return first;
+        } else { /* first == 0x1B */
+            byte second = (byte) buf.readUnsignedByte();
+            if (second == 0x00) {
+                return first;
+            } else { /* second == 0xE3 */
+                return (short) 0xF8;
+            }
+        }
+    }
+
+
+    private void skipBytesUnescaped(ByteBuf buf, int howMany) {
+        for (int i = 0; i < howMany; ++i) {
+            readUnsignedByteUnescaped(buf);
+        }
+    }
+
+
+    private void readBytesUnescaped(ByteBuf buf, byte[] to) {
+        for (int i = 0; i < to.length; ++i) {
+            to[i] = (byte) readUnsignedByteUnescaped(buf);
+        }
+    }
+
+    private void readBytesUnescaped(ByteBuf buf, byte[] to, int dstIndex, int length) {
+        for (int i = dstIndex; i < length; ++i) {
+            to[i] = (byte) readUnsignedByteUnescaped(buf);
+        }
+    }
+
+
+    private int readUnsignedShortUnescaped(ByteBuf buf) {
+        byte[] shortBuf = new byte[2];
+        readBytesUnescaped(buf, shortBuf);
+        return Shorts.fromByteArray(shortBuf);
+    }
+
+
+    private int readIntUnescaped(ByteBuf buf) {
+        byte[] intBuf = new byte[4];
+        readBytesUnescaped(buf, intBuf);
+        return Ints.fromByteArray(intBuf);
+    }
+
+
+    private void decodeSYSSub(ByteBuf buf) {
+        LOGGER.debug("<SYS>");
+
+        skipBytesUnescaped(buf, 1); /* Total length */
+
+        /* NOTE: assuming order:
+         * Device name -> Firmware version -> Hardware version.
+         * TODO: actually check it.
+         */
+
+        /* Device name */
+        short devNameLen = readUnsignedByteUnescaped(buf);
+        byte[] devName = new byte[devNameLen & 0xF];
+        readBytesUnescaped(buf, devName);
+        String devNameString = new String(devName);
+        LOGGER.debug("Device name: " + devNameString);
+
+        /* Firmware version */
+        short firmwareLen = readUnsignedByteUnescaped(buf);
+        byte[] firmware = new byte[firmwareLen & 0xF];
+        readBytesUnescaped(buf, firmware);
+        String firmwareString = new String(firmware);
+        LOGGER.debug("Firmware version: " + firmwareString);
+
+        /* Hardware version */
+        short hardwareLen = readUnsignedByteUnescaped(buf);
+        byte[] hardware = new byte[hardwareLen & 0xF];
+        readBytesUnescaped(buf, hardware);
+        String hardwareString = new String(hardware);
+        LOGGER.debug("Hardware version: " + hardwareString);
+
+        LOGGER.debug("</SYS>");
+    }
+
+
+    private void decodeGPSSub(ByteBuf buf, Position position) {
+        LOGGER.debug("<GPS>");
+
+        skipBytesUnescaped(buf, 1); /* Total length */
+
+        int subMask = readUnsignedShortUnescaped(buf);
+        if ((subMask & G1RUS_GPS_SIGN_MASK) == G1RUS_GPS_SIGN_MASK) {
+            short signValid = readUnsignedByteUnescaped(buf);
+            LOGGER.debug("Fix sign: " + ((signValid & 0b1100000) >> 5));
+            LOGGER.debug("Satellite number: " + (signValid & 0b0011111));
+            position.setValid(((signValid & 0b1100000) >> 5) == 2);
+            position.set(Position.KEY_SATELLITES, signValid & 0b0011111);
+        }
+        if ((subMask & G1RUS_GPS_POS_MASK) == G1RUS_GPS_POS_MASK) {
+            byte[] posBuf = new byte[4];
+            readBytesUnescaped(buf, posBuf);
+            position.setLatitude((float) Ints.fromByteArray(posBuf) / 1000000);
+            LOGGER.debug("Latitude: " + position.getLatitude());
+
+            readBytesUnescaped(buf, posBuf);
+            position.setLongitude((float) Ints.fromByteArray(posBuf) / 1000000);
+            LOGGER.debug("Longitude: " + position.getLongitude());
+        }
+        if ((subMask & G1RUS_GPS_SPD_MASK) == G1RUS_GPS_SPD_MASK) {
+            position.setSpeed(readUnsignedShortUnescaped(buf));
+            LOGGER.debug("Speed: " + position.getSpeed());
+        }
+        if ((subMask & G1RUS_GPS_AZTH_MASK) == G1RUS_GPS_AZTH_MASK) {
+            position.setCourse(readUnsignedShortUnescaped(buf));
+            LOGGER.debug("Course: " + position.getCourse());
+        }
+        if ((subMask & G1RUS_GPS_ALT_MASK) == G1RUS_GPS_ALT_MASK) {
+            position.setAltitude(readUnsignedShortUnescaped(buf));
+            LOGGER.debug("Altitude: " + position.getAltitude());
+        }
+        if ((subMask & G1RUS_GPS_HDOP_MASK) == G1RUS_GPS_HDOP_MASK) {
+            position.set(Position.KEY_HDOP, readUnsignedShortUnescaped(buf));
+            LOGGER.debug("HDOP: " + position.getAttributes().get(Position.KEY_HDOP));
+        }
+        if ((subMask & G1RUS_GPS_VDOP_MASK) == G1RUS_GPS_VDOP_MASK) {
+            position.set(Position.KEY_VDOP, readUnsignedShortUnescaped(buf));
+            LOGGER.debug("VDOP: " + position.getAttributes().get(Position.KEY_VDOP));
+        }
+
+        LOGGER.debug("</GPS>");
+    }
+
+
+    private int getADValue(int rawValue) {
+        final int AD_MIN = -10;
+        final int AD_MAX = 100;
+
+        return rawValue * (AD_MAX - AD_MIN) / 4096 + AD_MIN;
+    }
+
+
+    private void decodeADCSub(ByteBuf buf, Position position) {
+        LOGGER.debug("<ADC>");
+
+        skipBytesUnescaped(buf, 1);
+
+        /* NOTE: assuming order:
+         * External battery voltage -> Backup battery voltage -> Device temperature voltage.
+         * TODO: actually check this.
+         */
+
+        int externalVoltage = readUnsignedShortUnescaped(buf) & G1RUS_ADC_DATA_MASK;
+        LOGGER.debug("External voltage: " + getADValue(externalVoltage) + "V [" + externalVoltage + "]");
+
+        int backupVoltage = readUnsignedShortUnescaped(buf) & G1RUS_ADC_DATA_MASK;
+        LOGGER.debug("Backup voltage: " + getADValue(backupVoltage) + "V [" + backupVoltage + "]");
+        position.set(Position.KEY_BATTERY, getADValue(backupVoltage));
+
+        int temperature = readUnsignedShortUnescaped(buf) & G1RUS_ADC_DATA_MASK;
+        LOGGER.debug("Device temperature: " + getADValue(temperature) + "°C [" + temperature + "]");
+        position.set(Position.KEY_DEVICE_TEMP, getADValue(temperature));
+
+        LOGGER.debug("</ADC>");
+    }
+
+
+    private Position decodeRegular(Channel channel, SocketAddress remoteAddress, ByteBuf buf, long imei, short packetType) {
+        int timestamp_ = readIntUnescaped(buf);
+        long timestamp = (946684800 + timestamp_) * 1000L; /* Convert received time to proper UNIX timestamp */
+        LOGGER.debug("Date and time: " + new SimpleDateFormat("yyyy.MM.dd HH:mm:ss").format(new Date(timestamp)));
+
+        if ((packetType & G1RUS_TYPE_EVENT_MASK) != G1RUS_TYPE_NON_EVENT) {
+            skipBytesUnescaped(buf, 1); /* Event ID */
+        }
+
+        DeviceSession deviceSession = null;
+        Position position = null;
+
+        int dataUploadingMask = readUnsignedShortUnescaped(buf);
+        if ((dataUploadingMask & G1RUS_DATA_SYS_MASK) == G1RUS_DATA_SYS_MASK) {
+            decodeSYSSub(buf);
+        }
+        if ((dataUploadingMask & G1RUS_DATA_GPS_MASK) == G1RUS_DATA_GPS_MASK) {
+            deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(imei));
+            if (deviceSession == null) {
+                return null;
+            }
+            position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+            position.setTime(new Date(timestamp));
+
+            decodeGPSSub(buf, position);
+        }
+        if ((dataUploadingMask & G1RUS_DATA_GSM_MASK) == G1RUS_DATA_GSM_MASK) {
+            skipBytesUnescaped(buf, readUnsignedByteUnescaped(buf));
+        }
+        if ((dataUploadingMask & G1RUS_DATA_COT_MASK) == G1RUS_DATA_COT_MASK) {
+            skipBytesUnescaped(buf, readUnsignedByteUnescaped(buf));
+        }
+        if ((dataUploadingMask & G1RUS_DATA_ADC_MASK) == G1RUS_DATA_ADC_MASK) {
+            if (deviceSession == null) {
+                skipBytesUnescaped(buf, readUnsignedByteUnescaped(buf));
+            } else {
+                decodeADCSub(buf, position);
+            }
+        }
+        if ((dataUploadingMask & G1RUS_DATA_DTT_MASK) == G1RUS_DATA_DTT_MASK) {
+            skipBytesUnescaped(buf, readUnsignedByteUnescaped(buf));
+        }
+        if ((dataUploadingMask & G1RUS_DATA_ETD_MASK) == G1RUS_DATA_ETD_MASK) {
+            skipBytesUnescaped(buf, readUnsignedByteUnescaped(buf));
+        }
+
+        return position;
+    }
+
+
+    private Object decodeSMSForward(ByteBuf buf) {
+        return null;
+    }
+
+
+    private Object decodeSerialPassThrough(ByteBuf buf) {
+        return null;
+    }
+
+
+    private void printPacketType(short packetType) {
+        LOGGER.debug("Packet type: " + (packetType == G1RUS_TYPE_HEARTBEAT ? "HEARTBEAT" :
+                    "[" + ((packetType & G1RUS_TYPE_IMEI_MASK) == G1RUS_TYPE_IMEI_LONG ? "IMEI_LONG" : "IMEI_SHORT") + "]" +
+                    "[" + ((packetType & G1RUS_TYPE_EVENT_MASK) == G1RUS_TYPE_NON_EVENT ? "NON-EVENT" : "EVENT") + "]" +
+                    "[" + ((packetType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_REGULAR ? "REGULAR" : (packetType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_SMS_FORWARD ? "SMS FORWARD" : (packetType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_SERIAL_PASS_THROUGH ? "PASS THROUGH" : (packetType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_MIXED ? "MIXED PACKED" : "RESERVED/INVALID") + "]"));
+    }
+
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (buf.readUnsignedByte() != G1RUS_HEAD_TAIL) {
+            return null;
+        }
+
+        LOGGER.debug("Protocol version: " + readUnsignedByteUnescaped(buf));
+
+        short packetType = readUnsignedByteUnescaped(buf);
+        printPacketType(packetType);
+
+        byte[] imei = new byte[8];
+        readBytesUnescaped(buf, imei, 0, 7);
+        long imeiLong = Longs.fromByteArray(imei);
+        LOGGER.debug("IMEI: " + imeiLong);
+
+        List<Position> positions = null;
+
+        if (packetType == G1RUS_TYPE_HEARTBEAT) {
+            return null;
+        } else if ((packetType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_REGULAR) {
+            positions = new LinkedList<>();
+            Position position = decodeRegular(channel, remoteAddress, buf, imeiLong, packetType);
+            if (position != null) {
+                positions.add(position);
+            }
+        } else if ((packetType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_SMS_FORWARD) {
+            return decodeSMSForward(buf);
+        } else if ((packetType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_SERIAL_PASS_THROUGH) {
+            return decodeSerialPassThrough(buf);
+        } else if ((packetType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_MIXED) {
+            positions = new LinkedList<>();
+
+            while (buf.readableBytes() > 5) {
+                int subPacketLength = readUnsignedShortUnescaped(buf);
+                short subPacketType = readUnsignedByteUnescaped(buf);
+                printPacketType(subPacketType);
+
+                if ((subPacketType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_REGULAR) {
+                    Position position = decodeRegular(channel, remoteAddress, buf, imeiLong, subPacketType);
+                    if (position != null) {
+                        positions.add(position);
+                    }
+                } else {
+                    skipBytesUnescaped(buf, subPacketLength - 1);
+                }
+                /* else if ((subPacketType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_SMS_FORWARD) {
+                    skipBytesUnescaped(buf, subPacketLength - 1);
+                    *//*decodeSMSForward(buf);*//*
+                } else if ((subPacketType & G1RUS_TYPE_BCD_MASK) == G1RUS_TYPE_SERIAL_PASS_THROUGH) {
+                    skipBytesUnescaped(buf, subPacketLength - 1);
+                    *//*decodeSerialPassThrough(buf);*//*
+                }*/
+            }
+        } else {
+            LOGGER.error("Unknown packet type!");
+        }
+
+        skipBytesUnescaped(buf, 2); /* CRC */ /* TODO: actually check it */
+        short tail = buf.readUnsignedByte();
+        if (tail == G1RUS_HEAD_TAIL) {
+            LOGGER.debug("Tail: OK");
+        } else {
+            LOGGER.error("Tail: FAIL!");
+        }
+
+        return positions;
+    }
+}