From e84f02c3bffda311e86fab584d7c40702b5223be Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Thu, 1 Oct 2015 14:45:47 +1300
Subject: Improve Meiligao device identification

---
 src/org/traccar/protocol/MeiligaoProtocolDecoder.java | 19 ++++++++++++-------
 .../traccar/protocol/MeiligaoProtocolDecoderTest.java |  3 +++
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
index 43142744c..c660107ca 100644
--- a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
+++ b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
@@ -80,7 +80,7 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
 
     private static final int MSG_RFID = 0x9966;
     
-    private String getImei(ChannelBuffer buf) {
+    private boolean identify(ChannelBuffer buf, Channel channel) {
         String id = "";
 
         for (int i = 0; i < 7; i++) {
@@ -98,12 +98,17 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
         }
 
         if (id.length() == 14) {
-            id += Crc.luhnChecksum(Long.valueOf(id)); // IMEI checksum
-        }
-        if (id.length() > 15) {
-            id = id.substring(0, 15);
+            // Sometimes first digit is cut, so this won't work
+            if (identify(id + Crc.luhnChecksum(Long.valueOf(id)), channel, null, false)) {
+                return true;
+            }
+        } else if (id.length() > 15) {
+            if (identify(id.substring(0, 15), channel, null, false)) {
+                return true;
+            }
         }
-        return id;
+
+        return identify(id, channel);
     }
     
     private static void sendResponse(
@@ -189,7 +194,7 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
         }
 
         // Get device by id
-        if (!identify(getImei(id), channel)) {
+        if (!identify(id, channel)) {
             return null;
         }
         position.setDeviceId(getDeviceId());
diff --git a/test/org/traccar/protocol/MeiligaoProtocolDecoderTest.java b/test/org/traccar/protocol/MeiligaoProtocolDecoderTest.java
index 1c4252c0f..f48c9ef39 100644
--- a/test/org/traccar/protocol/MeiligaoProtocolDecoderTest.java
+++ b/test/org/traccar/protocol/MeiligaoProtocolDecoderTest.java
@@ -13,6 +13,9 @@ public class MeiligaoProtocolDecoderTest extends ProtocolDecoderTest {
 
         MeiligaoProtocolDecoder decoder = new MeiligaoProtocolDecoder(new MeiligaoProtocol());
 
+        verify(decoder.decode(null, null, ChannelBuffers.wrappedBuffer(ChannelBufferTools.convertHexString(
+                "242400706796502079108999553131333131382e3030302c412c313033372e393637382c4e2c30363132312e353637392c572c302e35342c322e34322c3330303931352c2c2c412a37307c302e37377c392e397c303030307c303030302c303161327c3030313138373132374cae0d0a"))));
+
         verify(decoder.decode(null, null, ChannelBuffers.wrappedBuffer(ChannelBufferTools.convertHexString(
                 "24240074630700194707719966009E1F7F00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007C3132303334302C3238303630362C323430302E303030302C4E2C31323130302E303030302C458F7E0D0A"))));
 
-- 
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