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authorAnton Tananaev <anton.tananaev@gmail.com>2018-05-25 05:59:13 +1200
committerAnton Tananaev <anton.tananaev@gmail.com>2018-05-25 05:59:13 +1200
commit7a1791b67cbb47033f818cce2c57322c3161eef0 (patch)
tree1ecdbf7c16ab071202b16fa2f1c7387cd486ab78 /src/org/traccar/protocol/SabertekFrameDecoder.java
parente93f4bc11bda5f6851b6be4bd35e552435e31418 (diff)
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Implement Sabertek protocol
Diffstat (limited to 'src/org/traccar/protocol/SabertekFrameDecoder.java')
-rw-r--r--src/org/traccar/protocol/SabertekFrameDecoder.java44
1 files changed, 44 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/SabertekFrameDecoder.java b/src/org/traccar/protocol/SabertekFrameDecoder.java
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+++ b/src/org/traccar/protocol/SabertekFrameDecoder.java
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+/*
+ * Copyright 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+
+public class SabertekFrameDecoder extends FrameDecoder {
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception {
+
+ int beginIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x02);
+ if (beginIndex >= 0) {
+ int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x03);
+ if (beginIndex >= 0) {
+ buf.readerIndex(beginIndex + 1);
+ ChannelBuffer frame = buf.readBytes(endIndex - beginIndex - 1);
+ buf.readerIndex(endIndex + 1);
+ buf.skipBytes(2); // end line
+ return frame;
+ }
+ }
+
+ return null;
+ }
+
+}