Add Meitrack WiFi Aps, celltowers and network info

Includes WiFi aps, celltowers and network information.

Based on page 8-10 of Meitrack protocol:
https://www.meitrack.com/cd-download/Protocols/MEITRACK_P88L_GPRS_Protocol.pdf

Closes #5171

1 files changed, 40 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/MeitrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/MeitrackProtocolDecoder.java
index 0f0d22021..eb0a80e05 100644
--- a/src/main/java/org/traccar/protocol/MeitrackProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/MeitrackProtocolDecoder.java
@@ -16,6 +16,7 @@
 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;
@@ -30,6 +31,7 @@ import org.traccar.helper.UnitsConverter;
 import org.traccar.model.CellTower;
 import org.traccar.model.Network;
 import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
 
 import java.net.SocketAddress;
 import java.nio.charset.StandardCharsets;
@@ -394,6 +396,8 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
             Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
+            Network network = new Network();
+
             buf.readUnsignedShortLE(); // length
             buf.readUnsignedShortLE(); // index
 
@@ -537,6 +541,32 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
                 int id = extension ? buf.readUnsignedShort() : buf.readUnsignedByte();
                 int length = buf.readUnsignedByte();
                 switch (id) {
+                    case 0x1D:
+                    case 0x1E:
+                    case 0x1F:
+                    case 0x20:
+                    case 0x21:
+                    case 0x22:
+                    case 0x23:
+                    case 0x24:
+                    case 0x25:
+                        String wifiMAC = ByteBufUtil.hexDump(buf.readSlice(6));
+                        int wifiRSSI = buf.readUnsignedShortLE();
+                        network.addWifiAccessPoint(WifiAccessPoint.from(wifiMAC, wifiRSSI));
+                        break;
+                    case 0x0E:
+                    case 0x0F:
+                    case 0x10:
+                    case 0x12:
+                    case 0x13:
+                        int stationMCC = buf.readUnsignedShortLE();
+                        int stationMNC = buf.readUnsignedShortLE();
+                        int stationLAC = buf.readUnsignedShortLE();
+                        long stationID = buf.readUnsignedIntLE();
+                        int stationRX_LEVEL = buf.readUnsignedShortLE();
+                        network.addCellTower(CellTower.from(stationMCC, stationMNC, stationLAC, stationID,
+                            stationRX_LEVEL));
+                        break;
                     case 0x2A:
                     case 0x2B:
                     case 0x2C:
@@ -548,6 +578,13 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
                         buf.readUnsignedByte(); // label
                         position.set(Position.PREFIX_TEMP + (id - 0x2A), buf.readShortLE() * 0.01);
                         break;
+                    case 0x4B:
+                        position.set("networkVersion", buf.readUnsignedByte());
+                        position.set("networkType", buf.readUnsignedByte());
+                        int networkDescLen = buf.readUnsignedByte();
+                        String networkDesc = buf.readSlice(networkDescLen).toString(StandardCharsets.US_ASCII);
+                        network.setRadioType(networkDesc);
+                        break;
                     case 0xFE31:
                         buf.readUnsignedByte(); // alarm protocol
                         buf.readUnsignedByte(); // alarm type
@@ -570,6 +607,9 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
                 }
             }
 
+            if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
+                position.setNetwork(network);
+            }
             positions.add(position);
         }