From 1afe1e818d77d2e6df520071aa7e6b0c9f335454 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Mon, 2 Nov 2020 22:03:03 -0800
Subject: Decode CalAmp user data

---
 .../traccar/protocol/CalAmpProtocolDecoder.java    | 42 ++++++++++++++--------
 1 file changed, 28 insertions(+), 14 deletions(-)

(limited to 'src/main/java')

diff --git a/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java b/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java
index dad0ae774..59b1fdf21 100644
--- a/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2020 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.
@@ -28,6 +28,7 @@ import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
 import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
 import java.util.Date;
 
 public class CalAmpProtocolDecoder extends BaseProtocolDecoder {
@@ -121,22 +122,34 @@ public class CalAmpProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_EVENT, buf.readUnsignedByte());
         }
 
-        int accType = BitUtil.from(buf.getUnsignedByte(buf.readerIndex()), 6);
-        int accCount = BitUtil.to(buf.readUnsignedByte(), 6);
+        if (type == MSG_EVENT_REPORT || type == MSG_LOCATE_REPORT || type == MSG_MINI_EVENT_REPORT) {
 
-        if (type != MSG_MINI_EVENT_REPORT) {
-            position.set("append", buf.readUnsignedByte());
-        }
+            int accType = BitUtil.from(buf.getUnsignedByte(buf.readerIndex()), 6);
+            int accCount = BitUtil.to(buf.readUnsignedByte(), 6);
 
-        if (accType == 1) {
-            buf.readUnsignedInt(); // threshold
-            buf.readUnsignedInt(); // mask
-        }
+            if (type != MSG_MINI_EVENT_REPORT) {
+                position.set("append", buf.readUnsignedByte());
+            }
 
-        for (int i = 0; i < accCount; i++) {
-            if (buf.readableBytes() >= 4) {
-                position.set("acc" + i, buf.readUnsignedInt());
+            if (accType == 1) {
+                buf.readUnsignedInt(); // threshold
+                buf.readUnsignedInt(); // mask
             }
+
+            for (int i = 0; i < accCount; i++) {
+                if (buf.readableBytes() >= 4) {
+                    position.set("acc" + i, buf.readUnsignedInt());
+                }
+            }
+
+        } else if (type == MSG_USER_DATA) {
+
+            buf.readUnsignedByte(); // message route
+            buf.readUnsignedByte(); // message id
+            position.set(
+                    Position.KEY_RESULT,
+                    buf.readCharSequence(buf.readUnsignedShort(), StandardCharsets.US_ASCII).toString().trim());
+
         }
 
         return position;
@@ -192,7 +205,8 @@ public class CalAmpProtocolDecoder extends BaseProtocolDecoder {
             sendResponse(channel, remoteAddress, type, index, 0);
         }
 
-        if (type == MSG_EVENT_REPORT || type == MSG_LOCATE_REPORT || type == MSG_MINI_EVENT_REPORT) {
+        if (type == MSG_EVENT_REPORT || type == MSG_LOCATE_REPORT
+                || type == MSG_MINI_EVENT_REPORT || type == MSG_USER_DATA) {
             return decodePosition(deviceSession, type, buf);
         }
 
-- 
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