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Diffstat (limited to 'src/main/java/org/traccar/protocol/TelicFrameDecoder.java')
-rw-r--r--src/main/java/org/traccar/protocol/TelicFrameDecoder.java55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/TelicFrameDecoder.java b/src/main/java/org/traccar/protocol/TelicFrameDecoder.java
new file mode 100644
index 000000000..d1fef1b5b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TelicFrameDecoder.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2016 - 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 org.traccar.BaseFrameDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class TelicFrameDecoder extends BaseFrameDecoder {
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+ if (buf.readableBytes() < 4) {
+ return null;
+ }
+
+ long length = buf.getUnsignedIntLE(buf.readerIndex());
+
+ if (length < 1024) {
+ if (buf.readableBytes() >= length + 4) {
+ buf.readUnsignedIntLE();
+ return buf.readRetainedSlice((int) length);
+ }
+ } else {
+ int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
+ if (endIndex >= 0) {
+ ByteBuf frame = buf.readRetainedSlice(endIndex - buf.readerIndex());
+ buf.readByte();
+ if (frame.readableBytes() > 0) {
+ return frame;
+ }
+ }
+ }
+
+ return null;
+ }
+
+}