From d847f80334498bde6993b8f3a38c7df05d83b47b Mon Sep 17 00:00:00 2001 From: Anton Tananaev Date: Mon, 26 Mar 2018 06:45:10 +1300 Subject: Implement EGTS responses --- src/org/traccar/helper/Checksum.java | 35 +++++++ src/org/traccar/protocol/EgtsProtocol.java | 7 +- src/org/traccar/protocol/EgtsProtocolDecoder.java | 109 ++++++++++++++++++---- 3 files changed, 133 insertions(+), 18 deletions(-) (limited to 'src/org/traccar') diff --git a/src/org/traccar/helper/Checksum.java b/src/org/traccar/helper/Checksum.java index 43ba6a689..c4141e7d2 100644 --- a/src/org/traccar/helper/Checksum.java +++ b/src/org/traccar/helper/Checksum.java @@ -129,6 +129,33 @@ public final class Checksum { 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040, }; + private static final int[] CRC8_TABLE = { + 0x00, 0x31, 0x62, 0x53, 0xC4, 0xF5, 0xA6, 0x97, + 0xB9, 0x88, 0xDB, 0xEA, 0x7D, 0x4C, 0x1F, 0x2E, + 0x43, 0x72, 0x21, 0x10, 0x87, 0xB6, 0xE5, 0xD4, + 0xFA, 0xCB, 0x98, 0xA9, 0x3E, 0x0F, 0x5C, 0x6D, + 0x86, 0xB7, 0xE4, 0xD5, 0x42, 0x73, 0x20, 0x11, 0x3F, + 0x0E, 0x5D, 0x6C, 0xFB, 0xCA, 0x99, 0xA8, 0xC5, 0xF4, 0xA7, 0x96, + 0x01, 0x30, 0x63, 0x52, 0x7C, 0x4D, 0x1E, 0x2F, 0xB8, 0x89, 0xDA, + 0xEB, 0x3D, 0x0C, 0x5F, 0x6E, 0xF9, 0xC8, 0x9B, 0xAA, 0x84, 0xB5, + 0xE6, 0xD7, 0x40, 0x71, 0x22, 0x13, 0x7E, 0x4F, 0x1C, 0x2D, 0xBA, + 0x8B, 0xD8, 0xE9, 0xC7, 0xF6, 0xA5, 0x94, 0x03, 0x32, 0x61, 0x50, + 0xBB, 0x8A, 0xD9, 0xE8, 0x7F, 0x4E, 0x1D, 0x2C, 0x02, 0x33, 0x60, + 0x51, 0xC6, 0xF7, 0xA4, 0x95, 0xF8, 0xC9, 0x9A, 0xAB, 0x3C, 0x0D, + 0x5E, 0x6F, 0x41, 0x70, 0x23, 0x12, 0x85, 0xB4, 0xE7, 0xD6, 0x7A, + 0x4B, 0x18, 0x29, 0xBE, 0x8F, 0xDC, 0xED, 0xC3, 0xF2, 0xA1, 0x90, + 0x07, 0x36, 0x65, 0x54, 0x39, 0x08, 0x5B, 0x6A, 0xFD, 0xCC, 0x9F, + 0xAE, 0x80, 0xB1, 0xE2, 0xD3, 0x44, 0x75, 0x26, 0x17, 0xFC, 0xCD, + 0x9E, 0xAF, 0x38, 0x09, 0x5A, 0x6B, 0x45, 0x74, 0x27, 0x16, 0x81, + 0xB0, 0xE3, 0xD2, 0xBF, 0x8E, 0xDD, 0xEC, 0x7B, 0x4A, 0x19, 0x28, + 0x06, 0x37, 0x64, 0x55, 0xC2, 0xF3, 0xA0, 0x91, 0x47, 0x76, 0x25, + 0x14, 0x83, 0xB2, 0xE1, 0xD0, 0xFE, 0xCF, 0x9C, 0xAD, 0x3A, 0x0B, + 0x58, 0x69, 0x04, 0x35, 0x66, 0x57, 0xC0, 0xF1, 0xA2, 0x93, 0xBD, + 0x8C, 0xDF, 0xEE, 0x79, 0x48, 0x1B, 0x2A, 0xC1, 0xF0, 0xA3, 0x92, + 0x05, 0x34, 0x67, 0x56, 0x78, 0x49, 0x1A, 0x2B, 0xBC, 0x8D, 0xDE, + 0xEF, 0x82, 0xB3, 0xE0, 0xD1, 0x46, 0x77, 0x24, 0x15, 0x3B, 0x0A, + 0x59, 0x68, 0xFF, 0xCE, 0x9D, 0xAC }; + // More info: http://reveng.sourceforge.net/crc-catalogue/16.htm public static final String CRC16_IBM = "IBM"; public static final String CRC16_MODBUS = "MODBUS"; @@ -181,6 +208,14 @@ public final class Checksum { } } + public static int crc8(ByteBuffer buf) { + int crc = 0xFF; + while (buf.hasRemaining()) { + crc = CRC8_TABLE[(crc ^ buf.get()) & 0xFF]; + } + return crc & 0xFF; + } + public static int crc32(ByteBuffer buf) { CRC32 checksum = new CRC32(); while (buf.hasRemaining()) { diff --git a/src/org/traccar/protocol/EgtsProtocol.java b/src/org/traccar/protocol/EgtsProtocol.java index 0a57f0061..13ec6c9a7 100644 --- a/src/org/traccar/protocol/EgtsProtocol.java +++ b/src/org/traccar/protocol/EgtsProtocol.java @@ -20,6 +20,7 @@ import org.jboss.netty.channel.ChannelPipeline; import org.traccar.BaseProtocol; import org.traccar.TrackerServer; +import java.nio.ByteOrder; import java.util.List; public class EgtsProtocol extends BaseProtocol { @@ -30,13 +31,15 @@ public class EgtsProtocol extends BaseProtocol { @Override public void initTrackerServers(List serverList) { - serverList.add(new TrackerServer(new ServerBootstrap(), getName()) { + TrackerServer server = new TrackerServer(new ServerBootstrap(), getName()) { @Override protected void addSpecificHandlers(ChannelPipeline pipeline) { pipeline.addLast("frameDecoder", new EgtsFrameDecoder()); pipeline.addLast("objectDecoder", new EgtsProtocolDecoder(EgtsProtocol.this)); } - }); + }; + server.setEndianness(ByteOrder.LITTLE_ENDIAN); + serverList.add(server); } } diff --git a/src/org/traccar/protocol/EgtsProtocolDecoder.java b/src/org/traccar/protocol/EgtsProtocolDecoder.java index d05504d81..85376b1a5 100644 --- a/src/org/traccar/protocol/EgtsProtocolDecoder.java +++ b/src/org/traccar/protocol/EgtsProtocolDecoder.java @@ -16,13 +16,17 @@ package org.traccar.protocol; import org.jboss.netty.buffer.ChannelBuffer; +import org.jboss.netty.buffer.ChannelBuffers; import org.jboss.netty.channel.Channel; import org.traccar.BaseProtocolDecoder; import org.traccar.DeviceSession; import org.traccar.helper.BitUtil; +import org.traccar.helper.Checksum; import org.traccar.model.Position; import java.net.SocketAddress; +import java.nio.ByteOrder; +import java.nio.charset.StandardCharsets; import java.util.Date; import java.util.LinkedList; import java.util.List; @@ -33,6 +37,10 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder { super(protocol); } + public static final int PT_RESPONSE = 0; + public static final int PT_APPDATA = 1; + public static final int PT_SIGNED_APPDATA = 2; + public static final int SERVICE_AUTH = 1; public static final int SERVICE_TELEDATA = 2; public static final int SERVICE_COMMANDS = 4; @@ -60,6 +68,44 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder { public static final int MSG_LIQUID_LEVEL_SENSOR = 27; public static final int MSG_PASSENGERS_COUNTERS = 28; + private int packetId; + + private void sendResponse( + Channel channel, int packetType, int index, int serviceType, int type, ChannelBuffer content) { + if (channel != null) { + + ChannelBuffer data = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0); + data.writeByte(type); + data.writeShort(content.readableBytes()); + data.writeBytes(content); + + ChannelBuffer record = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0); + record.writeShort(data.readableBytes()); + record.writeShort(index); + record.writeByte(1 << 6); // flags + record.writeByte(serviceType); + record.writeByte(serviceType); + record.writeBytes(data); + int recordChecksum = Checksum.crc16(Checksum.CRC16_CCITT_FALSE, record.toByteBuffer()); + + ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0); + response.writeByte(1); // protocol version + response.writeByte(0); // security key id + response.writeByte(0); // flags + response.writeByte(5 + 2 + 2 + 2); // header length + response.writeByte(0); // encoding + response.writeShort(record.readableBytes()); + response.writeShort(packetId++); + response.writeByte(packetType); + response.writeByte(Checksum.crc8(response.toByteBuffer())); + response.writeBytes(record); + response.writeShort(recordChecksum); + + channel.write(response); + + } + } + @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { @@ -68,26 +114,16 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder { buf.skipBytes(buf.getUnsignedByte(buf.readerIndex() + 3)); - DeviceSession deviceSession = null; List positions = new LinkedList<>(); while (buf.readableBytes() > 2) { int length = buf.readUnsignedShort(); - - buf.readUnsignedShort(); // index - + int index = buf.readUnsignedShort(); int recordFlags = buf.readUnsignedByte(); if (BitUtil.check(recordFlags, 0)) { - String deviceId = String.valueOf(buf.readUnsignedInt()); - if (deviceSession == null) { - deviceSession = getDeviceSession(channel, remoteAddress, deviceId); - } - } - - if (deviceSession == null) { - deviceSession = getDeviceSession(channel, remoteAddress); + buf.readUnsignedInt(); // object id } if (BitUtil.check(recordFlags, 1)) { @@ -97,19 +133,58 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder { buf.readUnsignedInt(); // time } - buf.readUnsignedByte(); // source service type + int serviceType = buf.readUnsignedByte(); buf.readUnsignedByte(); // recipient service type int recordEnd = buf.readerIndex() + length; Position position = new Position(getProtocolName()); - position.setDeviceId(deviceSession.getDeviceId()); + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress); + if (deviceSession != null) { + position.setDeviceId(deviceSession.getDeviceId()); + } + + ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0); + response.writeShort(index); + response.writeByte(0); // success + sendResponse(channel, PT_RESPONSE, index, serviceType, MSG_RECORD_RESPONSE, response); while (buf.readerIndex() < recordEnd) { int type = buf.readUnsignedByte(); int end = buf.readUnsignedShort() + buf.readerIndex(); - if (type == MSG_POS_DATA) { + if (type == MSG_TERM_IDENTITY) { + + buf.readUnsignedInt(); // object id + int flags = buf.readUnsignedByte(); + + if (BitUtil.check(flags, 0)) { + buf.readUnsignedShort(); // home dispatcher identifier + } + if (BitUtil.check(flags, 1)) { + getDeviceSession(channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII)); + } + if (BitUtil.check(flags, 2)) { + getDeviceSession(channel, remoteAddress, buf.readBytes(16).toString(StandardCharsets.US_ASCII)); + } + if (BitUtil.check(flags, 3)) { + buf.skipBytes(3); // language identifier + } + if (BitUtil.check(flags, 5)) { + buf.skipBytes(3); // network identifier + } + if (BitUtil.check(flags, 6)) { + buf.readUnsignedShort(); // buffer size + } + if (BitUtil.check(flags, 7)) { + getDeviceSession(channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII)); + } + + response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0); + response.writeByte(0); // success + sendResponse(channel, PT_APPDATA, index, serviceType, MSG_RESULT_CODE, response); + + } else if (type == MSG_POS_DATA) { position.setTime(new Date((buf.readUnsignedInt() + 1262304000) * 1000)); // since 2010-01-01 position.setLatitude(buf.readUnsignedInt() * 90.0 / 0xFFFFFFFFL); @@ -166,7 +241,9 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder { buf.readerIndex(end); } - positions.add(position); + if (deviceSession != null) { + positions.add(position); + } } return positions.isEmpty() ? null : positions; 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