diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/OmnicommProtocolDecoder.java')
-rw-r--r-- | src/main/java/org/traccar/protocol/OmnicommProtocolDecoder.java | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/OmnicommProtocolDecoder.java b/src/main/java/org/traccar/protocol/OmnicommProtocolDecoder.java new file mode 100644 index 000000000..cd8b74c9a --- /dev/null +++ b/src/main/java/org/traccar/protocol/OmnicommProtocolDecoder.java @@ -0,0 +1,142 @@ +/* + * 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 com.google.protobuf.InvalidProtocolBufferException; +import io.netty.buffer.ByteBuf; +import io.netty.buffer.ByteBufUtil; +import io.netty.buffer.Unpooled; +import io.netty.channel.Channel; +import org.traccar.BaseProtocolDecoder; +import org.traccar.DeviceSession; +import org.traccar.NetworkMessage; +import org.traccar.Protocol; +import org.traccar.helper.Checksum; +import org.traccar.helper.UnitsConverter; +import org.traccar.model.Position; +import org.traccar.protobuf.OmnicommMessageOuterClass; + +import java.net.SocketAddress; +import java.util.Date; +import java.util.LinkedList; +import java.util.List; + +public class OmnicommProtocolDecoder extends BaseProtocolDecoder { + + public OmnicommProtocolDecoder(Protocol protocol) { + super(protocol); + } + + public static final int MSG_IDENTIFICATION = 0x80; + public static final int MSG_ARCHIVE_INQUIRY = 0x85; + public static final int MSG_ARCHIVE_DATA = 0x86; + public static final int MSG_REMOVE_ARCHIVE_INQUIRY = 0x87; + + private OmnicommMessageOuterClass.OmnicommMessage parseProto( + ByteBuf buf, int length) throws InvalidProtocolBufferException { + + final byte[] array; + final int offset; + if (buf.hasArray()) { + array = buf.array(); + offset = buf.arrayOffset() + buf.readerIndex(); + } else { + array = ByteBufUtil.getBytes(buf, buf.readerIndex(), length, false); + offset = 0; + } + buf.skipBytes(length); + + return OmnicommMessageOuterClass.OmnicommMessage + .getDefaultInstance().getParserForType().parseFrom(array, offset, length); + } + + private void sendResponse(Channel channel, int type, long index) { + if (channel != null) { + ByteBuf response = Unpooled.buffer(); + response.writeByte(0xC0); + response.writeByte(type); + response.writeShortLE(4); + response.writeIntLE((int) index); + response.writeShortLE(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, + response.nioBuffer(1, response.writerIndex() - 1))); + channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress())); + } + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + buf.readUnsignedByte(); // prefix + int type = buf.readUnsignedByte(); + buf.readUnsignedShortLE(); // length + + if (type == MSG_IDENTIFICATION) { + + getDeviceSession(channel, remoteAddress, String.valueOf(buf.readUnsignedIntLE())); + sendResponse(channel, MSG_ARCHIVE_INQUIRY, 0); + + } else if (type == MSG_ARCHIVE_DATA) { + + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress); + if (deviceSession == null) { + return null; + } + + long index = buf.readUnsignedIntLE(); + buf.readUnsignedIntLE(); // time + buf.readUnsignedByte(); // priority + + List<Position> positions = new LinkedList<>(); + + while (buf.readableBytes() > 2) { + + OmnicommMessageOuterClass.OmnicommMessage message = parseProto(buf, buf.readUnsignedShortLE()); + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + if (message.hasNAV()) { + OmnicommMessageOuterClass.OmnicommMessage.NAV nav = message.getNAV(); + position.setValid(true); + position.setTime(new Date((nav.getGPSTime() + 1230768000) * 1000L)); // from 2009-01-01 12:00 + position.setLatitude(nav.getLAT() * 0.0000001); + position.setLongitude(nav.getLON() * 0.0000001); + position.setSpeed(UnitsConverter.knotsFromKph(nav.getGPSVel() * 0.1)); + position.setCourse(nav.getGPSDir()); + position.setAltitude(nav.getGPSAlt() * 0.1); + position.set(Position.KEY_SATELLITES, nav.getGPSNSat()); + } + + if (position.getFixTime() != null) { + positions.add(position); + } + } + + if (positions.isEmpty()) { + sendResponse(channel, MSG_REMOVE_ARCHIVE_INQUIRY, index + 1); + return null; + } else { + return positions; + } + } + + return null; + } + +} |