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authorAnton Tananaev <anton.tananaev@gmail.com>2019-01-31 22:46:39 -0800
committerGitHub <noreply@github.com>2019-01-31 22:46:39 -0800
commit46d3fe1130fe6963a2e0480c6033cfc5d36514bf (patch)
tree0775e2f84c6b50917288bb43e3225613781a42ab /src/org/traccar/protocol
parent2b2fef08daaa7950a4911aef184f4dca56500da1 (diff)
parenta3c540a952b5136b1de2900c8947847f70b39446 (diff)
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Merge pull request #4201 from iEvgeny/navis-flex
Implemented FLEX 1.0/2.0 extension support for Navis (NTCB) protocol
Diffstat (limited to 'src/org/traccar/protocol')
-rw-r--r--src/org/traccar/protocol/NavisFrameDecoder.java119
-rw-r--r--src/org/traccar/protocol/NavisProtocol.java5
-rw-r--r--src/org/traccar/protocol/NavisProtocolDecoder.java453
3 files changed, 534 insertions, 43 deletions
diff --git a/src/org/traccar/protocol/NavisFrameDecoder.java b/src/org/traccar/protocol/NavisFrameDecoder.java
new file mode 100644
index 000000000..0146243cd
--- /dev/null
+++ b/src/org/traccar/protocol/NavisFrameDecoder.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2019 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.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.TooLongFrameException;
+import java.nio.charset.StandardCharsets;
+import org.traccar.BaseFrameDecoder;
+import org.traccar.BasePipelineFactory;
+
+public class NavisFrameDecoder extends BaseFrameDecoder {
+
+ private int flexDataSize; // bytes
+
+ private static final int NTCB_HEADER_LENGTH = 16;
+ private static final int NTCB_LENGTH_OFFSET = 12;
+ private static final int FLEX_HEADER_LENGTH = 2;
+ private static final int MAX_FRAME_LENGTH = 65551;
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+ // Check minimum length
+ if (buf.readableBytes() < 1) {
+ return null;
+ }
+
+ if (buf.readableBytes() > MAX_FRAME_LENGTH) {
+ throw new TooLongFrameException();
+ }
+
+ if (buf.getByte(buf.readerIndex()) == 0x7F) {
+ // FLEX keep alive frame
+ return buf.readRetainedSlice(1);
+ }
+
+ if (ctx != null) {
+ NavisProtocolDecoder protocolDecoder =
+ BasePipelineFactory.getHandler(ctx.pipeline(), NavisProtocolDecoder.class);
+ if (protocolDecoder != null) {
+ flexDataSize = protocolDecoder.getFlexDataSize();
+ }
+ }
+
+ if (flexDataSize > 0) {
+ // FLEX frame
+ if (buf.readableBytes() > FLEX_HEADER_LENGTH) {
+ int length = 0;
+ String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
+ switch (type) {
+ // FLEX 1.0
+ case "~A":
+ length = flexDataSize * buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH) + 1 + 1;
+ break;
+ case "~T":
+ length = flexDataSize + 4 + 1;
+ break;
+ case "~C":
+ length = flexDataSize + 1;
+ break;
+ // FLEX 2.0 (Extra packages)
+ case "~E":
+ length++;
+ for (int i = 0; i < buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH); i++) {
+ if (buf.readableBytes() > FLEX_HEADER_LENGTH + length + 1) {
+ length += buf.getUnsignedShort(length + FLEX_HEADER_LENGTH) + 2;
+ } else {
+ return null;
+ }
+ }
+ length++;
+ break;
+ case "~X":
+ length = buf.getUnsignedShortLE(buf.readerIndex() + FLEX_HEADER_LENGTH) + 4 + 1;
+ break;
+ default:
+ return null;
+ }
+
+ if (buf.readableBytes() >= FLEX_HEADER_LENGTH + length) {
+ return buf.readRetainedSlice(buf.readableBytes());
+ }
+ }
+ } else {
+ // NTCB frame
+ if (buf.readableBytes() < NTCB_HEADER_LENGTH) {
+ return null;
+ }
+
+ int length = buf.getUnsignedShortLE(buf.readerIndex() + NTCB_LENGTH_OFFSET);
+ if (buf.readableBytes() >= NTCB_HEADER_LENGTH + length) {
+ return buf.readRetainedSlice(NTCB_HEADER_LENGTH + length);
+ }
+ }
+
+ return null;
+ }
+
+ public void setFlexDataSize(int flexDataSize) {
+ this.flexDataSize = flexDataSize;
+ }
+
+}
diff --git a/src/org/traccar/protocol/NavisProtocol.java b/src/org/traccar/protocol/NavisProtocol.java
index 83a9dc99d..db0eba8c1 100644
--- a/src/org/traccar/protocol/NavisProtocol.java
+++ b/src/org/traccar/protocol/NavisProtocol.java
@@ -15,22 +15,19 @@
*/
package org.traccar.protocol;
-import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import org.traccar.BaseProtocol;
import org.traccar.PipelineBuilder;
import org.traccar.TrackerServer;
-import java.nio.ByteOrder;
public class NavisProtocol extends BaseProtocol {
public NavisProtocol() {
addServer(new TrackerServer(false, getName()) {
@Override
protected void addProtocolHandlers(PipelineBuilder pipeline) {
- pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 4096, 12, 2, 2, 0, true));
+ pipeline.addLast(new NavisFrameDecoder());
pipeline.addLast(new NavisProtocolDecoder(NavisProtocol.this));
}
});
}
-
}
diff --git a/src/org/traccar/protocol/NavisProtocolDecoder.java b/src/org/traccar/protocol/NavisProtocolDecoder.java
index 83088e9f0..ad20ea61f 100644
--- a/src/org/traccar/protocol/NavisProtocolDecoder.java
+++ b/src/org/traccar/protocol/NavisProtocolDecoder.java
@@ -23,6 +23,8 @@ import org.traccar.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.Checksum.Algorithm;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
@@ -31,14 +33,24 @@ import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.LinkedList;
import java.util.List;
+import java.util.Date;
public class NavisProtocolDecoder extends BaseProtocolDecoder {
private String prefix;
private long deviceUniqueId, serverId;
+ private int flexDataSize; // bytes
+ private int flexBitfieldDataSize; // bits
+ private final byte[] flexBitfield;
+ private static final int[] FLEX_FIELDS_SIZES = {4, 2, 4, 1, 1, 1, 1, 1, 4, 4, 4, 4, 4, 2, 4, 4, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 4, 4, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1,
+ 1, 2, 4, 2, 1, 4, 2, 2, 2, 2, 2, 1, 1, 1, 2, 4, 2, 1, /* FLEX 2.0 */ 8, 2, 1, 16, 4, 2, 4, 37, 1,
+ 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 6, 12, 24, 48, 1, 1, 1, 1, 4, 4, 1, 4, 2, 6, 2, 6, 2,
+ 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1}; // bytes
public NavisProtocolDecoder(Protocol protocol) {
super(protocol);
+ this.flexBitfield = new byte[16];
}
public static final int F10 = 0x01;
@@ -77,7 +89,7 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
}
}
- private ParseResult parsePosition(DeviceSession deviceSession, ByteBuf buf) {
+ private ParseResult parseNtcbPosition(DeviceSession deviceSession, ByteBuf buf) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
@@ -99,12 +111,12 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
short armedStatus = buf.readUnsignedByte();
if (isFormat(format, F10, F20, F30, F40, F50, F51, F52)) {
- position.set(Position.KEY_ARMED, armedStatus & 0x7F);
+ position.set(Position.KEY_ARMED, BitUtil.to(armedStatus, 7));
if (BitUtil.check(armedStatus, 7)) {
position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
}
} else if (isFormat(format, F60)) {
- position.set(Position.KEY_ARMED, armedStatus & 0x1);
+ position.set(Position.KEY_ARMED, BitUtil.check(armedStatus, 0));
if (BitUtil.check(armedStatus, 1)) {
position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
}
@@ -114,19 +126,48 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
if (isFormat(format, F10, F20, F30)) {
- position.set(Position.KEY_OUTPUT, buf.readUnsignedShortLE());
+ int output = buf.readUnsignedShortLE();
+ position.set(Position.KEY_OUTPUT, output);
+ for (int i = 0; i < 16; i++) {
+ position.set(Position.PREFIX_OUT + (i + 1), BitUtil.check(output, i));
+ }
} else if (isFormat(format, F50, F51, F52)) {
- int extField = buf.readUnsignedByte();
- position.set(Position.KEY_OUTPUT, extField & 0x3);
- position.set(Position.KEY_SATELLITES, extField >> 2);
+ short extField = buf.readUnsignedByte();
+ position.set(Position.KEY_OUTPUT, BitUtil.to(extField, 2));
+ position.set(Position.PREFIX_OUT + 1, BitUtil.check(extField, 0));
+ position.set(Position.PREFIX_OUT + 2, BitUtil.check(extField, 1));
+ position.set(Position.KEY_SATELLITES, BitUtil.from(extField, 2));
} else if (isFormat(format, F40, F60)) {
- position.set(Position.KEY_OUTPUT, buf.readUnsignedByte() & 0xF);
+ short output = buf.readUnsignedByte();
+ position.set(Position.KEY_OUTPUT, BitUtil.to(output, 4));
+ for (int i = 0; i < 4; i++) {
+ position.set(Position.PREFIX_OUT + (i + 1), BitUtil.check(output, i));
+ }
}
if (isFormat(format, F10, F20, F30, F40)) {
- position.set(Position.KEY_INPUT, buf.readUnsignedShortLE());
+ int input = buf.readUnsignedShortLE();
+ position.set(Position.KEY_INPUT, input);
+ if (!isFormat(format, F40)) {
+ for (int i = 0; i < 16; i++) {
+ position.set(Position.PREFIX_IN + (i + 1), BitUtil.check(input, i));
+ }
+ } else {
+ position.set(Position.PREFIX_IN + 1, BitUtil.check(input, 0));
+ position.set(Position.PREFIX_IN + 2, BitUtil.check(input, 1));
+ position.set(Position.PREFIX_IN + 3, BitUtil.check(input, 2));
+ position.set(Position.PREFIX_IN + 4, BitUtil.check(input, 3));
+ position.set(Position.PREFIX_IN + 5, BitUtil.between(input, 4, 7));
+ position.set(Position.PREFIX_IN + 6, BitUtil.between(input, 7, 10));
+ position.set(Position.PREFIX_IN + 7, BitUtil.between(input, 10, 12));
+ position.set(Position.PREFIX_IN + 8, BitUtil.between(input, 12, 14));
+ }
} else if (isFormat(format, F50, F51, F52, F60)) {
- position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+ short input = buf.readUnsignedByte();
+ position.set(Position.KEY_INPUT, input);
+ for (int i = 0; i < 8; i++) {
+ position.set(Position.PREFIX_IN + (i + 1), BitUtil.check(input, i));
+ }
}
position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
@@ -183,7 +224,7 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
int navSensorState = buf.readUnsignedByte();
position.setValid(BitUtil.check(navSensorState, 1));
if (isFormat(format, F60)) {
- position.set(Position.KEY_SATELLITES, navSensorState >> 2);
+ position.set(Position.KEY_SATELLITES, BitUtil.from(navSensorState, 2));
}
DateBuilder dateBuilder = new DateBuilder()
@@ -199,6 +240,7 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
position.setLatitude(buf.readFloatLE() / Math.PI * 180);
position.setLongitude(buf.readFloatLE() / Math.PI * 180);
}
+
position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloatLE()));
position.setCourse(buf.readUnsignedShortLE());
@@ -234,13 +276,13 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
return new ParseResult(index, position);
}
- private Object processSingle(DeviceSession deviceSession, Channel channel, ByteBuf buf) {
- ParseResult result = parsePosition(deviceSession, buf);
+ private Object processNtcbSingle(DeviceSession deviceSession, Channel channel, ByteBuf buf) {
+ ParseResult result = parseNtcbPosition(deviceSession, buf);
- ByteBuf response = Unpooled.buffer(8);
+ ByteBuf response = Unpooled.buffer(7);
response.writeCharSequence("*<T", StandardCharsets.US_ASCII);
response.writeIntLE((int) result.getId());
- sendReply(channel, response);
+ sendNtcbReply(channel, response);
if (result.getPosition().getFixTime() == null) {
return null;
@@ -249,21 +291,21 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
return result.getPosition();
}
- private Object processArray(DeviceSession deviceSession, Channel channel, ByteBuf buf) {
+ private Object processNtcbArray(DeviceSession deviceSession, Channel channel, ByteBuf buf) {
List<Position> positions = new LinkedList<>();
int count = buf.readUnsignedByte();
for (int i = 0; i < count; i++) {
- Position position = parsePosition(deviceSession, buf).getPosition();
+ Position position = parseNtcbPosition(deviceSession, buf).getPosition();
if (position.getFixTime() != null) {
positions.add(position);
}
}
- ByteBuf response = Unpooled.buffer(8);
+ ByteBuf response = Unpooled.buffer(7);
response.writeCharSequence("*<A", StandardCharsets.US_ASCII);
response.writeByte(count);
- sendReply(channel, response);
+ sendNtcbReply(channel, response);
if (positions.isEmpty()) {
return null;
@@ -272,41 +314,320 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
return positions;
}
- private Object processHandshake(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
- buf.readByte(); // colon symbol
- if (getDeviceSession(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII)) != null) {
- sendReply(channel, Unpooled.copiedBuffer("*<S", StandardCharsets.US_ASCII));
+ private boolean checkFlexBitfield(int index) {
+ int byteIndex = Math.floorDiv(index, 8);
+ int bitIndex = Math.floorMod(index, 8);
+ return BitUtil.check(flexBitfield[byteIndex], 7 - bitIndex);
+ }
+
+ private ParseResult parseFlexPosition(DeviceSession deviceSession, ByteBuf buf) {
+
+ Position position = new Position(getProtocolName());
+
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ long index = 0;
+ int status = 0;
+ short input = 0;
+ short output = 0;
+
+ for (int i = 0; i < flexBitfieldDataSize; i++) {
+ if (!checkFlexBitfield(i)) {
+ continue;
+ }
+
+ switch (i) {
+ case 0:
+ index = buf.readUnsignedIntLE();
+ position.set(Position.KEY_INDEX, index);
+ break;
+ case 1:
+ position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
+ break;
+ case 3:
+ short armedStatus = buf.readUnsignedByte();
+ position.set(Position.KEY_ARMED, BitUtil.check(armedStatus, 0));
+ if (BitUtil.check(armedStatus, 1)) {
+ position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+ }
+ break;
+ case 4:
+ status = buf.readUnsignedByte();
+ position.set(Position.KEY_STATUS, status);
+ break;
+ case 5:
+ int status2 = buf.readUnsignedByte();
+ position.set(Position.KEY_STATUS, (short) (BitUtil.to(status, 8) | (status2 << 8)));
+ break;
+ case 6:
+ position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+ break;
+ case 7:
+ int navSensorState = buf.readUnsignedByte();
+ position.setValid(BitUtil.check(navSensorState, 1));
+ position.set(Position.KEY_SATELLITES, BitUtil.from(navSensorState, 2));
+ break;
+ case 8:
+ position.setTime(new DateBuilder(new Date(buf.readUnsignedIntLE() * 1000)).getDate());
+ break;
+ case 9:
+ position.setLatitude(buf.readIntLE() / 600000.0);
+ break;
+ case 10:
+ position.setLongitude(buf.readIntLE() / 600000.0);
+ break;
+ case 11:
+ position.setAltitude(buf.readIntLE() * 0.1);
+ break;
+ case 12:
+ position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloatLE()));
+ break;
+ case 13:
+ position.setCourse(buf.readUnsignedShortLE());
+ break;
+ case 14:
+ position.set(Position.KEY_ODOMETER, buf.readFloatLE() * 1000);
+ break;
+ case 15:
+ position.set(Position.KEY_DISTANCE, buf.readFloatLE() * 1000);
+ break;
+ case 18:
+ position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
+ break;
+ case 19:
+ position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+ break;
+ case 20:
+ case 21:
+ case 22:
+ case 23:
+ case 24:
+ case 25:
+ case 26:
+ case 27:
+ position.set(Position.PREFIX_ADC + (i - 19), buf.readUnsignedShortLE());
+ break;
+ case 28:
+ input = buf.readUnsignedByte();
+ position.set(Position.KEY_INPUT, input);
+ for (int k = 0; k < 8; k++) {
+ position.set(Position.PREFIX_IN + (k + 1), BitUtil.check(input, k));
+ }
+ break;
+ case 29:
+ short input2 = buf.readUnsignedByte();
+ position.set(Position.KEY_INPUT, (short) (BitUtil.to(input, 8) | (input2 << 8)));
+ for (int k = 0; k < 8; k++) {
+ position.set(Position.PREFIX_IN + (k + 9), BitUtil.check(input2, k));
+ }
+ break;
+ case 30:
+ output = buf.readUnsignedByte();
+ position.set(Position.KEY_OUTPUT, output);
+ for (int k = 0; k < 8; k++) {
+ position.set(Position.PREFIX_OUT + (k + 1), BitUtil.check(output, k));
+ }
+ break;
+ case 31:
+ short output2 = buf.readUnsignedByte();
+ position.set(Position.KEY_OUTPUT, (short) (BitUtil.to(output, 8) | (output2 << 8)));
+ for (int k = 0; k < 8; k++) {
+ position.set(Position.PREFIX_OUT + (k + 9), BitUtil.check(output2, k));
+ }
+ break;
+ case 36:
+ position.set(Position.KEY_HOURS, buf.readUnsignedIntLE() * 1000);
+ break;
+ case 44:
+ case 45:
+ case 46:
+ case 47:
+ case 48:
+ case 49:
+ case 50:
+ case 51:
+ position.set(Position.PREFIX_TEMP + (i - 43), buf.readByte());
+ break;
+ case 68:
+ position.set("can-speed", buf.readUnsignedByte());
+ break;
+ // FLEX 2.0
+ case 69:
+ int satVisible = 0;
+ for (int k = 0; k < 8; k++) {
+ satVisible += buf.readUnsignedByte();
+ }
+ position.set(Position.KEY_SATELLITES_VISIBLE, satVisible);
+ break;
+ case 70:
+ position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
+ position.set(Position.KEY_PDOP, buf.readUnsignedByte() * 0.1);
+ break;
+ default:
+ if (i < FLEX_FIELDS_SIZES.length) {
+ buf.skipBytes(FLEX_FIELDS_SIZES[i]);
+ }
+ break;
+ }
}
+
+ return new ParseResult(index, position);
+ }
+
+ private ParseResult parseFlex20Position(DeviceSession deviceSession, ByteBuf buf) {
+ Position position = new Position(getProtocolName());
+
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ long index = 0;
+ int length = buf.readUnsignedShort();
+
+ if (length <= buf.readableBytes() && buf.readUnsignedByte() == 0x0A) {
+ buf.readUnsignedByte(); // length of static part
+
+ index = buf.readUnsignedIntLE();
+ position.set(Position.KEY_INDEX, index);
+
+ position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
+ buf.readUnsignedInt(); // event time
+
+ int navSensorState = buf.readUnsignedByte();
+ position.setValid(BitUtil.check(navSensorState, 1));
+ position.set(Position.KEY_SATELLITES, BitUtil.from(navSensorState, 2));
+
+ position.setTime(new DateBuilder(new Date(buf.readUnsignedIntLE() * 1000)).getDate());
+ position.setLatitude(buf.readIntLE() / 600000.0);
+ position.setLongitude(buf.readIntLE() / 600000.0);
+ position.setAltitude(buf.readIntLE() * 0.1);
+ position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloatLE()));
+ position.setCourse(buf.readUnsignedShortLE());
+ position.set(Position.KEY_ODOMETER, buf.readFloatLE() * 1000);
+
+ buf.skipBytes(length - buf.readerIndex() - 1); // skip unused part
+ }
+
+ return new ParseResult(index, position);
+ }
+
+ private interface FlexPositionParser {
+ ParseResult parsePosition(DeviceSession deviceSession, ByteBuf buf);
+ }
+
+ private Object processFlexSingle(
+ FlexPositionParser parser, String flexHeader, DeviceSession deviceSession, Channel channel, ByteBuf buf) {
+ if (!flexHeader.equals("~C")) {
+ buf.readUnsignedInt(); // event index
+ }
+
+ ParseResult result = parser.parsePosition(deviceSession, buf);
+
+ ByteBuf response = Unpooled.buffer(6);
+ response.writeCharSequence(flexHeader, StandardCharsets.US_ASCII);
+ response.writeIntLE((int) result.getId());
+ sendFlexReply(channel, response);
+
+ if (result.getPosition().getFixTime() == null) {
+ return null;
+ }
+
+ return result.getPosition();
+ }
+
+ private Object processFlexArray(
+ FlexPositionParser parser, String flexHeader, DeviceSession deviceSession, Channel channel, ByteBuf buf) {
+ List<Position> positions = new LinkedList<>();
+ int count = buf.readUnsignedByte();
+
+ for (int i = 0; i < count; i++) {
+ Position position = parser.parsePosition(deviceSession, buf).getPosition();
+ if (position.getFixTime() != null) {
+ positions.add(position);
+ }
+ }
+
+ ByteBuf response = Unpooled.buffer(6);
+ response.writeCharSequence(flexHeader, StandardCharsets.US_ASCII);
+ response.writeByte(count);
+ sendFlexReply(channel, response);
+
+ if (positions.isEmpty()) {
+ return null;
+ }
+
+ return positions;
+ }
+
+ private Object processFlexNegotiation(Channel channel, ByteBuf buf) {
+ if ((byte) buf.readUnsignedByte() != (byte) 0xB0) {
+ return null;
+ }
+
+ short flexProtocolVersion = buf.readUnsignedByte();
+ short flexStructVersion = buf.readUnsignedByte();
+ if ((flexProtocolVersion == 0x0A || flexProtocolVersion == 0x14)
+ && (flexStructVersion == 0x0A || flexStructVersion == 0x14)) {
+
+ flexBitfieldDataSize = buf.readUnsignedByte();
+ if (flexBitfieldDataSize > 122) {
+ return null;
+ }
+
+ buf.readBytes(flexBitfield, 0, (int) Math.ceil((double) flexBitfieldDataSize / 8));
+
+ flexDataSize = 0;
+ for (int i = 0; i < flexBitfieldDataSize; i++) {
+ if (checkFlexBitfield(i)) {
+ flexDataSize += FLEX_FIELDS_SIZES[i];
+ }
+ }
+ } else {
+ // Preparing request to downgrade protocol version to FLEX 2.0
+ flexProtocolVersion = 0x14;
+ flexStructVersion = 0x14;
+ }
+
+ ByteBuf response = Unpooled.buffer(9);
+ response.writeCharSequence("*<FLEX", StandardCharsets.US_ASCII);
+ response.writeByte(0xB0);
+ response.writeByte(flexProtocolVersion);
+ response.writeByte(flexStructVersion);
+ sendNtcbReply(channel, response);
+
return null;
}
- private static short checksum(ByteBuf buf) {
- short sum = 0;
- for (int i = 0; i < buf.readableBytes(); i++) {
- sum ^= buf.getUnsignedByte(i);
+ private Object processHandshake(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+ buf.readByte(); // colon symbol
+ if (getDeviceSession(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII)) != null) {
+ sendNtcbReply(channel, Unpooled.copiedBuffer("*<S", StandardCharsets.US_ASCII));
}
- return sum;
+ return null;
}
- private void sendReply(Channel channel, ByteBuf data) {
+ private void sendNtcbReply(Channel channel, ByteBuf data) {
if (channel != null) {
ByteBuf header = Unpooled.buffer(16);
header.writeCharSequence(prefix, StandardCharsets.US_ASCII);
header.writeIntLE((int) deviceUniqueId);
header.writeIntLE((int) serverId);
header.writeShortLE(data.readableBytes());
- header.writeByte(checksum(data));
- header.writeByte(checksum(header));
+ header.writeByte(Checksum.xor(data.nioBuffer()));
+ header.writeByte(Checksum.xor(header.nioBuffer()));
channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(header, data), channel.remoteAddress()));
}
}
- @Override
- protected Object decode(
- Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+ private void sendFlexReply(Channel channel, ByteBuf data) {
+ if (channel != null) {
+ ByteBuf cs = Unpooled.buffer(1);
+ cs.writeByte(Checksum.crc8(new Algorithm(8, 0x31, 0xFF, false, false, 0x00), data.nioBuffer()));
- ByteBuf buf = (ByteBuf) msg;
+ channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(data, cs), channel.remoteAddress()));
+ }
+ }
+
+ private Object decodeNtcb(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
prefix = buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII);
buf.skipBytes(prefix.length()); // prefix @NTC by default
@@ -327,10 +648,16 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
} else {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession != null) {
- if (type.equals("*>T")) {
- return processSingle(deviceSession, channel, buf);
- } else if (type.equals("*>A")) {
- return processArray(deviceSession, channel, buf);
+ switch (type) {
+ case "*>A":
+ return processNtcbArray(deviceSession, channel, buf);
+ case "*>T":
+ return processNtcbSingle(deviceSession, channel, buf);
+ case "*>F":
+ buf.skipBytes(3);
+ return processFlexNegotiation(channel, buf);
+ default:
+ break;
}
}
}
@@ -338,4 +665,52 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
return null;
}
+ private Object decodeFlex(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+ if (buf.getByte(buf.readerIndex()) == 0x7F) {
+ // keep alive message
+ return null;
+ }
+
+ String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
+ buf.skipBytes(type.length());
+
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+ if (deviceSession != null) {
+ switch (type) {
+ // FLEX 1.0
+ case "~A":
+ return processFlexArray(this::parseFlexPosition, type, deviceSession, channel, buf);
+ case "~T":
+ case "~C":
+ return processFlexSingle(this::parseFlexPosition, type, deviceSession, channel, buf);
+ // FLEX 2.0 (Extra packages)
+ case "~E":
+ return processFlexArray(this::parseFlex20Position, type, deviceSession, channel, buf);
+ case "~X":
+ return processFlexSingle(this::parseFlex20Position, type, deviceSession, channel, buf);
+ default:
+ break;
+ }
+ }
+
+ return null;
+ }
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ByteBuf buf = (ByteBuf) msg;
+
+ if (flexDataSize > 0) {
+ return decodeFlex(channel, remoteAddress, buf);
+ } else {
+ return decodeNtcb(channel, remoteAddress, buf);
+ }
+ }
+
+ public int getFlexDataSize() {
+ return flexDataSize;
+ }
}