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-rw-r--r--src/org/traccar/helper/Crc.java17
-rw-r--r--src/org/traccar/protocol/MeiligaoProtocolDecoder.java15
2 files changed, 23 insertions, 9 deletions
diff --git a/src/org/traccar/helper/Crc.java b/src/org/traccar/helper/Crc.java
index 5a668f30a..213d1192a 100644
--- a/src/org/traccar/helper/Crc.java
+++ b/src/org/traccar/helper/Crc.java
@@ -154,4 +154,21 @@ public class Crc {
return String.format("*%02x", checksum).toUpperCase();
}
+ public static String luhnChecksum(String s) {
+ int sum = 0;
+ boolean evenPosition = true;
+ for (int i = s.length() - 1; i >= 0; i--) {
+ int n = Integer.parseInt(s.substring(i, i + 1));
+ if (evenPosition) {
+ n *= 2;
+ if (n > 9) {
+ n = (n % 10) + 1;
+ }
+ }
+ sum += n;
+ evenPosition = !evenPosition;
+ }
+ return String.valueOf(10 - sum % 10);
+ }
+
}
diff --git a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
index b28b38dc8..7ad91a807 100644
--- a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
+++ b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
@@ -1,5 +1,5 @@
/*
- * Copyright 2012 - 2013 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2012 - 2014 Anton Tananaev (anton.tananaev@gmail.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -60,10 +60,7 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
"(?:\\|([0-9a-fA-F]+))?" + // Milage
".*"); // TODO: parse ADC
- /**
- * Parse device id
- */
- private String getId(ChannelBuffer buf) {
+ private String getImei(ChannelBuffer buf) {
String id = "";
for (int i = 0; i < 7; i++) {
@@ -80,7 +77,7 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
id += d2;
}
- return id;
+ return id + Crc.luhnChecksum(id);
}
@Override
@@ -135,11 +132,11 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
}
// Get device by id
- String id = getId(buf);
+ String imei = getImei(buf);
try {
- position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
+ position.setDeviceId(getDataManager().getDeviceByImei(imei).getId());
} catch(Exception error) {
- Log.warning("Unknown device - " + id);
+ Log.warning("Unknown device - " + imei);
return null;
}