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authorAnton Tananaev <anton@traccar.org>2022-09-18 11:31:41 -0700
committerAnton Tananaev <anton@traccar.org>2022-09-18 11:31:41 -0700
commit5612d29b74a1c5ded13955565cf1b48f2307813c (patch)
tree78ec7b1db425d44805afdc0425609632e4dcbeb5 /src/main/java/org/traccar/protocol
parentaa7509c4d234552dc9a8fc7041190e9da0fda590 (diff)
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Refactor G1RUS protocol
Diffstat (limited to 'src/main/java/org/traccar/protocol')
-rw-r--r--src/main/java/org/traccar/protocol/G1rusFrameDecoder.java49
-rw-r--r--src/main/java/org/traccar/protocol/G1rusProtocol.java18
-rw-r--r--src/main/java/org/traccar/protocol/G1rusProtocolDecoder.java412
3 files changed, 165 insertions, 314 deletions
diff --git a/src/main/java/org/traccar/protocol/G1rusFrameDecoder.java b/src/main/java/org/traccar/protocol/G1rusFrameDecoder.java
new file mode 100644
index 000000000..8c67207ad
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/G1rusFrameDecoder.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2022 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 io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class G1rusFrameDecoder extends BaseFrameDecoder {
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+ ByteBuf result = Unpooled.buffer();
+
+ while (buf.isReadable()) {
+ int b = buf.readUnsignedByte();
+ if (b == 0x1B) {
+ int ext = buf.readUnsignedByte();
+ if (ext == 0x00) {
+ result.writeByte(0x1B);
+ } else {
+ result.writeByte(0xF8);
+ }
+ } else {
+ result.writeByte(b);
+ }
+ }
+
+ return result;
+ }
+
+}
diff --git a/src/main/java/org/traccar/protocol/G1rusProtocol.java b/src/main/java/org/traccar/protocol/G1rusProtocol.java
index 0d77a8add..f1823762d 100644
--- a/src/main/java/org/traccar/protocol/G1rusProtocol.java
+++ b/src/main/java/org/traccar/protocol/G1rusProtocol.java
@@ -1,6 +1,20 @@
+/*
+ * Copyright 2022 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.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import org.traccar.BaseProtocol;
import org.traccar.PipelineBuilder;
@@ -16,9 +30,11 @@ public class G1rusProtocol extends BaseProtocol {
addServer(new TrackerServer(config, getName(), false) {
@Override
protected void addProtocolHandlers(PipelineBuilder pipeline, Config config) {
+ pipeline.addLast(new G1rusFrameDecoder());
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
index b1b7230e1..e974e446d 100644
--- a/src/main/java/org/traccar/protocol/G1rusProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/G1rusProtocolDecoder.java
@@ -1,20 +1,30 @@
+/*
+ * Copyright 2022 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 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.helper.BitUtil;
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.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
@@ -24,352 +34,128 @@ public class G1rusProtocolDecoder extends BaseProtocolDecoder {
super(protocol);
}
- private static final Logger LOGGER = LoggerFactory.getLogger(ConnectionManager.class);
+ public static final int MSG_HEARTBEAT = 0;
+ public static final int MSG_REGULAR = 1;
+ public static final int MSG_SMS_FORWARD = 2;
+ public static final int MSG_SERIAL = 3;
+ public static final int MSG_MIXED = 4;
- /* 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 String readString(ByteBuf buf) {
+ int length = buf.readUnsignedByte() & 0xF;
+ return buf.readCharSequence(length, StandardCharsets.US_ASCII).toString();
+ }
- private static final int G1RUS_ESCAPE_CHAR = 0x1B;
+ private Position decodeRegular(DeviceSession deviceSession, ByteBuf buf, int type) {
+ Position position = new Position(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+ position.setTime(new Date((buf.readUnsignedIntLE() + 946684800) * 1000L));
- 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;
- }
+ if (BitUtil.check(type, 6)) {
+ position.set(Position.KEY_EVENT, buf.readUnsignedByte());
}
- }
+ int dataMask = buf.readUnsignedShort();
- private void skipBytesUnescaped(ByteBuf buf, int howMany) {
- for (int i = 0; i < howMany; ++i) {
- readUnsignedByteUnescaped(buf);
+ if (BitUtil.check(dataMask, 0)) {
+ buf.readUnsignedByte(); // length
+ readString(buf); // device name
+ position.set(Position.KEY_VERSION_FW, readString(buf));
+ position.set(Position.KEY_VERSION_HW, readString(buf));
}
- }
-
- private void readBytesUnescaped(ByteBuf buf, byte[] to) {
- for (int i = 0; i < to.length; ++i) {
- to[i] = (byte) readUnsignedByteUnescaped(buf);
+ if (BitUtil.check(dataMask, 1)) {
+ buf.readUnsignedByte(); // length
+ int locationMask = buf.readUnsignedShort();
+ if (BitUtil.check(locationMask, 0)) {
+ int validity = buf.readUnsignedByte();
+ position.set(Position.KEY_SATELLITES, BitUtil.to(validity, 5));
+ position.setValid(BitUtil.between(validity, 5, 7) == 2);
+ }
+ if (BitUtil.check(locationMask, 1)) {
+ position.setLatitude(buf.readInt() / 1000000.0);
+ position.setLongitude(buf.readInt() / 1000000.0);
+ }
+ if (BitUtil.check(locationMask, 2)) {
+ position.setSpeed(buf.readUnsignedShort());
+ }
+ if (BitUtil.check(locationMask, 3)) {
+ position.setCourse(buf.readUnsignedShort());
+ }
+ if (BitUtil.check(locationMask, 4)) {
+ position.setAltitude(buf.readShort());
+ }
+ if (BitUtil.check(locationMask, 5)) {
+ position.set(Position.KEY_HDOP, buf.readUnsignedShort());
+ }
+ if (BitUtil.check(locationMask, 6)) {
+ position.set(Position.KEY_VDOP, buf.readUnsignedShort());
+ }
}
- }
- private void readBytesUnescaped(ByteBuf buf, byte[] to, int dstIndex, int length) {
- for (int i = dstIndex; i < length; ++i) {
- to[i] = (byte) readUnsignedByteUnescaped(buf);
+ if (BitUtil.check(dataMask, 2)) {
+ buf.skipBytes(buf.readUnsignedByte());
}
- }
-
-
- 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 (BitUtil.check(dataMask, 3)) {
+ buf.skipBytes(buf.readUnsignedByte());
}
- 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 */
+ if (BitUtil.check(dataMask, 4)) {
+ buf.readUnsignedByte(); // length
+ position.set(Position.KEY_POWER, buf.readUnsignedShort() * 110 / 4096 - 10);
+ position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 110 / 4096 - 10);
+ position.set(Position.KEY_DEVICE_TEMP, buf.readUnsignedShort() * 110 / 4096 - 10);
}
- DeviceSession deviceSession = null;
- Position position = null;
-
- int dataUploadingMask = readUnsignedShortUnescaped(buf);
- if ((dataUploadingMask & G1RUS_DATA_SYS_MASK) == G1RUS_DATA_SYS_MASK) {
- decodeSYSSub(buf);
+ if (BitUtil.check(dataMask, 5)) {
+ buf.skipBytes(buf.readUnsignedByte());
}
- 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));
+ if (BitUtil.check(dataMask, 7)) {
+ buf.skipBytes(buf.readUnsignedByte());
}
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) {
+ int type = buf.readUnsignedByte();
+ String imei = String.valueOf(buf.readLong());
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+ if (deviceSession == null) {
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);
+ if (BitUtil.to(type, 6) == MSG_REGULAR) {
- List<Position> positions = null;
+ return decodeRegular(deviceSession, buf, type);
- 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<>();
+ } else if (BitUtil.to(type, 6) == MSG_MIXED) {
+ List<Position> 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);
- }
+ int length = buf.readUnsignedShort();
+ int subtype = buf.readUnsignedByte();
+ if (BitUtil.to(subtype, 6) == MSG_REGULAR) {
+ positions.add(decodeRegular(deviceSession, buf, subtype));
} else {
- skipBytesUnescaped(buf, subPacketLength - 1);
+ buf.skipBytes(length);
}
- /* 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!");
- }
+ return positions.isEmpty() ? null : positions;
- 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;
+ buf.skipBytes(2);
+ buf.readUnsignedByte(); // tail
+
+ return null;
+
}
+
}