diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java')
| -rw-r--r-- | src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java b/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java new file mode 100644 index 000000000..31416d7f1 --- /dev/null +++ b/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java @@ -0,0 +1,202 @@ +/* + * Copyright 2015 - 2018 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.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.BitUtil; +import org.traccar.helper.UnitsConverter; +import org.traccar.model.Position; + +import java.net.SocketAddress; +import java.util.Date; + +public class CalAmpProtocolDecoder extends BaseProtocolDecoder { + + public CalAmpProtocolDecoder(Protocol protocol) { + super(protocol); + } + + public static final int MSG_NULL = 0; + public static final int MSG_ACK = 1; + public static final int MSG_EVENT_REPORT = 2; + public static final int MSG_ID_REPORT = 3; + public static final int MSG_USER_DATA = 4; + public static final int MSG_APP_DATA = 5; + public static final int MSG_CONFIG = 6; + public static final int MSG_UNIT_REQUEST = 7; + public static final int MSG_LOCATE_REPORT = 8; + public static final int MSG_USER_DATA_ACC = 9; + public static final int MSG_MINI_EVENT_REPORT = 10; + public static final int MSG_MINI_USER_DATA = 11; + + public static final int SERVICE_UNACKNOWLEDGED = 0; + public static final int SERVICE_ACKNOWLEDGED = 1; + public static final int SERVICE_RESPONSE = 2; + + private void sendResponse(Channel channel, SocketAddress remoteAddress, int type, int index, int result) { + if (channel != null) { + ByteBuf response = Unpooled.buffer(10); + response.writeByte(SERVICE_RESPONSE); + response.writeByte(MSG_ACK); + response.writeShort(index); + response.writeByte(type); + response.writeByte(result); + response.writeByte(0); + response.writeMedium(0); + channel.writeAndFlush(new NetworkMessage(response, remoteAddress)); + } + } + + private Position decodePosition(DeviceSession deviceSession, int type, ByteBuf buf) { + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + position.setTime(new Date(buf.readUnsignedInt() * 1000)); + if (type != MSG_MINI_EVENT_REPORT) { + buf.readUnsignedInt(); // fix time + } + position.setLatitude(buf.readInt() * 0.0000001); + position.setLongitude(buf.readInt() * 0.0000001); + if (type != MSG_MINI_EVENT_REPORT) { + position.setAltitude(buf.readInt() * 0.01); + position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedInt())); + } + position.setCourse(buf.readShort()); + if (type == MSG_MINI_EVENT_REPORT) { + position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte())); + } + + if (type == MSG_MINI_EVENT_REPORT) { + position.set(Position.KEY_SATELLITES, buf.getUnsignedByte(buf.readerIndex()) & 0xf); + position.setValid((buf.readUnsignedByte() & 0x20) == 0); + } else { + position.set(Position.KEY_SATELLITES, buf.readUnsignedByte()); + position.setValid((buf.readUnsignedByte() & 0x08) == 0); + } + + if (type != MSG_MINI_EVENT_REPORT) { + position.set("carrier", buf.readUnsignedShort()); + position.set(Position.KEY_RSSI, buf.readShort()); + } + + position.set("modem", buf.readUnsignedByte()); + + if (type != MSG_MINI_EVENT_REPORT) { + position.set(Position.KEY_HDOP, buf.readUnsignedByte()); + } + + int input = buf.readUnsignedByte(); + position.set(Position.KEY_INPUT, input); + position.set(Position.KEY_IGNITION, BitUtil.check(input, 0)); + + if (type != MSG_MINI_EVENT_REPORT) { + position.set(Position.KEY_STATUS, buf.readUnsignedByte()); + } + + if (type == MSG_EVENT_REPORT || type == MSG_MINI_EVENT_REPORT) { + if (type != MSG_MINI_EVENT_REPORT) { + buf.readUnsignedByte(); // event index + } + position.set(Position.KEY_EVENT, buf.readUnsignedByte()); + } + + int accType = BitUtil.from(buf.getUnsignedByte(buf.readerIndex()), 6); + int accCount = BitUtil.to(buf.readUnsignedByte(), 6); + + if (type != MSG_MINI_EVENT_REPORT) { + position.set("append", buf.readUnsignedByte()); + } + + if (accType == 1) { + buf.readUnsignedInt(); // threshold + buf.readUnsignedInt(); // mask + } + + for (int i = 0; i < accCount; i++) { + if (buf.readableBytes() >= 4) { + position.set("acc" + i, buf.readUnsignedInt()); + } + } + + return position; + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + if (BitUtil.check(buf.getByte(buf.readerIndex()), 7)) { + + int content = buf.readUnsignedByte(); + + if (BitUtil.check(content, 0)) { + String id = ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte())); + getDeviceSession(channel, remoteAddress, id); + } + + if (BitUtil.check(content, 1)) { + buf.skipBytes(buf.readUnsignedByte()); // identifier type + } + + if (BitUtil.check(content, 2)) { + buf.skipBytes(buf.readUnsignedByte()); // authentication + } + + if (BitUtil.check(content, 3)) { + buf.skipBytes(buf.readUnsignedByte()); // routing + } + + if (BitUtil.check(content, 4)) { + buf.skipBytes(buf.readUnsignedByte()); // forwarding + } + + if (BitUtil.check(content, 5)) { + buf.skipBytes(buf.readUnsignedByte()); // response redirection + } + + } + + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress); + if (deviceSession == null) { + return null; + } + + int service = buf.readUnsignedByte(); + int type = buf.readUnsignedByte(); + int index = buf.readUnsignedShort(); + + if (service == SERVICE_ACKNOWLEDGED) { + sendResponse(channel, remoteAddress, type, index, 0); + } + + if (type == MSG_EVENT_REPORT || type == MSG_LOCATE_REPORT || type == MSG_MINI_EVENT_REPORT) { + return decodePosition(deviceSession, type, buf); + } + + return null; + } + +} |