diff options
Diffstat (limited to 'src/org')
| -rw-r--r-- | src/org/traccar/protocol/NavisFrameDecoder.java | 119 | ||||
| -rw-r--r-- | src/org/traccar/protocol/NavisProtocol.java | 5 | ||||
| -rw-r--r-- | src/org/traccar/protocol/NavisProtocolDecoder.java | 453 |
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; + } } |