1 files changed, 48 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/Stl060FrameDecoder.java b/src/main/java/org/traccar/protocol/Stl060FrameDecoder.java
new file mode 100644
index 000000000..f72474e2b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Stl060FrameDecoder.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2014 - 2018 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.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.CharacterDelimiterFrameDecoder;
+
+public class Stl060FrameDecoder extends CharacterDelimiterFrameDecoder {
+
+    public Stl060FrameDecoder(int maxFrameLength) {
+        super(maxFrameLength, '#');
+    }
+
+    @Override
+    protected Object decode(ChannelHandlerContext ctx, ByteBuf buf) throws Exception {
+
+        ByteBuf result = (ByteBuf) super.decode(ctx, buf);
+
+        if (result != null) {
+
+            int index = result.indexOf(result.readerIndex(), result.writerIndex(), (byte) '$');
+            if (index == -1) {
+                return result;
+            } else {
+                result.skipBytes(index);
+                return result.readRetainedSlice(result.readableBytes());
+            }
+
+        }
+
+        return null;
+    }
+
+}