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authorAnton Tananaev <anton.tananaev@gmail.com>2019-04-24 21:37:47 -0700
committerAnton Tananaev <anton.tananaev@gmail.com>2019-04-24 21:38:05 -0700
commitbec490817a2251dc37f727f3a755a20411761993 (patch)
treeccbfd93aa45f181a9d71ef37d2a2fdc1d50c7f1f /src/main/java/org/traccar/protocol
parente944d60ea05ba527eee3d663c2ec88c9335ae1fb (diff)
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Implement Suntech frame decoder
Diffstat (limited to 'src/main/java/org/traccar/protocol')
-rw-r--r--src/main/java/org/traccar/protocol/SuntechFrameDecoder.java47
-rw-r--r--src/main/java/org/traccar/protocol/SuntechProtocol.java5
2 files changed, 49 insertions, 3 deletions
diff --git a/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java b/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java
new file mode 100644
index 000000000..de8de17f0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2019 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.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class SuntechFrameDecoder extends BaseFrameDecoder {
+
+ private ByteBuf readFrame(ByteBuf buf, int delimiterIndex) {
+ ByteBuf frame = buf.readRetainedSlice(delimiterIndex - buf.readerIndex());
+ buf.skipBytes(1); // delimiter
+ return frame;
+ }
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+ int delimiterIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r');
+ while (delimiterIndex > 0) {
+ if (delimiterIndex + 1 < buf.writerIndex() && buf.getByte(delimiterIndex + 1) == '\n') {
+ delimiterIndex = buf.indexOf(delimiterIndex + 1, buf.writerIndex(), (byte) '\r');
+ } else {
+ return readFrame(buf, delimiterIndex);
+ }
+ }
+
+ return null;
+ }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SuntechProtocol.java b/src/main/java/org/traccar/protocol/SuntechProtocol.java
index 29ae114e7..48d6e81c1 100644
--- a/src/main/java/org/traccar/protocol/SuntechProtocol.java
+++ b/src/main/java/org/traccar/protocol/SuntechProtocol.java
@@ -1,5 +1,5 @@
/*
- * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2019 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.
@@ -18,7 +18,6 @@ package org.traccar.protocol;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import org.traccar.BaseProtocol;
-import org.traccar.CharacterDelimiterFrameDecoder;
import org.traccar.PipelineBuilder;
import org.traccar.TrackerServer;
import org.traccar.model.Command;
@@ -37,7 +36,7 @@ public class SuntechProtocol extends BaseProtocol {
addServer(new TrackerServer(false, getName()) {
@Override
protected void addProtocolHandlers(PipelineBuilder pipeline) {
- pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\r'));
+ pipeline.addLast(new SuntechFrameDecoder());
pipeline.addLast(new StringEncoder());
pipeline.addLast(new StringDecoder());
pipeline.addLast(new SuntechProtocolEncoder());