diff options
Diffstat (limited to 'src/org/traccar/protocol/AutoFon45ProtocolDecoder.java')
| -rw-r--r-- | src/org/traccar/protocol/AutoFon45ProtocolDecoder.java | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/AutoFon45ProtocolDecoder.java b/src/org/traccar/protocol/AutoFon45ProtocolDecoder.java new file mode 100644 index 000000000..df98fa93b --- /dev/null +++ b/src/org/traccar/protocol/AutoFon45ProtocolDecoder.java @@ -0,0 +1,138 @@ +/* + * Copyright 2015 Vitaly Litvak (vitavaque@gmail.com) + * + * 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 static org.traccar.protocol.AutoFon45FrameDecoder.MSG_LOGIN; +import static org.traccar.protocol.AutoFon45FrameDecoder.MSG_LOCATION; + +import org.jboss.netty.buffer.ChannelBuffer; +import org.jboss.netty.buffer.ChannelBuffers; +import org.jboss.netty.channel.Channel; +import org.jboss.netty.channel.ChannelHandlerContext; +import org.traccar.BaseProtocolDecoder; +import org.traccar.database.DataManager; +import org.traccar.helper.ChannelBufferTools; +import org.traccar.helper.Log; +import org.traccar.model.ExtendedInfoFormatter; +import org.traccar.model.Position; + +import java.util.*; + +public class AutoFon45ProtocolDecoder extends BaseProtocolDecoder { + private long deviceId; + + private static double convertCoordinate(short degrees, int raw) { + double seconds = (raw >> 4 & 0xffffff) / 600000.0; + return (degrees + seconds) * ((raw & 0x0f) == 0 ? -1 : 1); + } + + public AutoFon45ProtocolDecoder(DataManager dataManager, String protocol, Properties properties) { + super(dataManager, protocol, properties); + } + + @Override + protected Object decode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { + ChannelBuffer buf = (ChannelBuffer) msg; + + int type = buf.getUnsignedByte(0); + + if (type == MSG_LOGIN) { + byte[] bytes = new byte[19]; + buf.readBytes(bytes); + + String imei = ChannelBufferTools.readHexString(ChannelBuffers.wrappedBuffer(bytes, 1, 16), 16).substring(1); + try { + deviceId = getDataManager().getDeviceByImei(imei).getId(); + } catch(Exception error) { + Log.warning("Unknown device - " + imei); + return null; + } + + // Send response (CRC) + if (channel != null) { + byte[] response = "resp_crc=".getBytes("US-ASCII"); + response = Arrays.copyOf(response, response.length + 1); + response[response.length - 1] = crc(bytes, 0, 18); + channel.write(ChannelBuffers.wrappedBuffer(response)); + } + } else if (type == MSG_LOCATION) { + buf.readUnsignedByte(); + + // Create new position + Position position = new Position(); + ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol()); + position.setDeviceId(deviceId); + + short status = buf.readUnsignedByte(); + extendedInfo.set("alarm", (status & 0x80) != 0); + extendedInfo.set("battery", status & 0x7F); + + buf.skipBytes(2); // remaining time + + extendedInfo.set("temperature", buf.readByte()); + + buf.skipBytes(2); // timer (interval and units) + buf.readByte(); // mode + buf.readByte(); // gprs sending interval + + buf.skipBytes(6); // MCC, MNC, LAC, CID + + // GPS status + int valid = buf.readUnsignedByte(); + position.setValid((valid & 0xc0) != 0); + extendedInfo.set("satellites", valid & 0x3f); + + // Date and time + int timeOfDay = buf.readUnsignedByte() << 16 | buf.readUnsignedByte() << 8 | buf.readUnsignedByte(); + int date = buf.readUnsignedByte() << 16 | buf.readUnsignedByte() << 8 | buf.readUnsignedByte(); + + Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); + time.clear(); + time.set(Calendar.HOUR_OF_DAY, timeOfDay / 10000); + time.set(Calendar.MINUTE, (timeOfDay - time.get(Calendar.HOUR_OF_DAY) * 10000) / 100); + time.set(Calendar.SECOND, (timeOfDay - time.get(Calendar.HOUR_OF_DAY) * 10000 - time.get(Calendar.MINUTE) * 100)); + time.set(Calendar.DAY_OF_MONTH, date / 10000); + time.set(Calendar.MONTH, (date - time.get(Calendar.DAY_OF_MONTH) * 10000) / 100 - 1); + time.set(Calendar.YEAR, 2000 + (date - time.get(Calendar.DAY_OF_MONTH) * 10000 - (time.get(Calendar.MONTH) + 1) * 100)); + position.setTime(time.getTime()); + + // Location + position.setLatitude(convertCoordinate(buf.readUnsignedByte(), buf.readUnsignedByte() << 16 | buf.readUnsignedByte() << 8 | buf.readUnsignedByte())); + position.setLongitude(convertCoordinate(buf.readUnsignedByte(), buf.readUnsignedByte() << 16 | buf.readUnsignedByte() << 8 | buf.readUnsignedByte())); + position.setSpeed((double) buf.readUnsignedByte()); + position.setCourse((double) (buf.readUnsignedByte() << 8 | buf.readUnsignedByte())); + position.setAltitude(0.0); + + buf.readUnsignedByte(); // checksum + + position.setExtendedInfo(extendedInfo.toString()); + return position; + } + + return null; + } + + private byte crc(byte[] bytes, int offset, int len) { + byte GPRS_CRC = 0x3B; + for (int i = offset; i < offset + len; i++) { + GPRS_CRC += 0x56 ^ bytes[i]; + GPRS_CRC++; + GPRS_CRC ^= 0xC5 + bytes[i]; + GPRS_CRC--; + } + return GPRS_CRC; + } +} |