From 09ee3fb9ac865d88f1966cd67fcba67d3c69e390 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Sun, 6 Mar 2022 13:53:03 -0800
Subject: Support Wanway S20 format

---
 .../java/org/traccar/protocol/Gt06ProtocolDecoder.java     | 14 +++++++++++---
 .../java/org/traccar/protocol/Gt06ProtocolDecoderTest.java |  3 +++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java
index ec09f371b..4d3448e84 100644
--- a/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2021 Anton Tananaev (anton@traccar.org)
+Supp * Copyright 2012 - 2022 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.
@@ -712,11 +712,17 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
             getLastLocation(position, dateBuilder.getDate());
 
+            boolean hasCellCount = type == MSG_LBS_MULTIPLE_3 && dataLength == 44;
+
+            if (hasCellCount) {
+                buf.readUnsignedByte(); // ta
+            }
+
             int mcc = buf.readUnsignedShort();
             int mnc = BitUtil.check(mcc, 15) ? buf.readUnsignedShort() : buf.readUnsignedByte();
             Network network = new Network();
 
-            int cellCount = type == MSG_WIFI_5 ? 6 : 7;
+            int cellCount = hasCellCount ? buf.readUnsignedByte() : type == MSG_WIFI_5 ? 6 : 7;
             for (int i = 0; i < cellCount; i++) {
                 int lac = longFormat ? buf.readInt() : buf.readUnsignedShort();
                 int cid = longFormat ? (int) buf.readLong() : buf.readUnsignedMedium();
@@ -726,7 +732,9 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                 }
             }
 
-            buf.readUnsignedByte(); // time leads
+            if (!hasCellCount) {
+                buf.readUnsignedByte(); // ta
+            }
 
             if (type != MSG_LBS_MULTIPLE_1 && type != MSG_LBS_MULTIPLE_2 && type != MSG_LBS_MULTIPLE_3
                     && type != MSG_LBS_2) {
diff --git a/src/test/java/org/traccar/protocol/Gt06ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gt06ProtocolDecoderTest.java
index 8aadb7fe3..ad65ec960 100644
--- a/src/test/java/org/traccar/protocol/Gt06ProtocolDecoderTest.java
+++ b/src/test/java/org/traccar/protocol/Gt06ProtocolDecoderTest.java
@@ -17,6 +17,9 @@ public class Gt06ProtocolDecoderTest extends ProtocolTest {
         verifyNull(decoder, binary(
                 "78780D01086471700328358100093F040D0A"));
 
+        verifyNotNull(decoder, binary(
+                "787831241603060c231e000194620213ee00606a3413ee0060692e000000000000000000000000000000000000000000003a0cb70d0a"));
+
         verifyNotNull(decoder, binary(
                 "78783B2810010D02020201CC00287D001F713E287D001F7231287D001E232D287D001F4018000000000000000000000000000000000000FF00020005B14B0D0A"));
 
-- 
cgit v1.2.3