aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/protocol/TotemFrameDecoder.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/org/traccar/protocol/TotemFrameDecoder.java')
-rw-r--r--src/org/traccar/protocol/TotemFrameDecoder.java51
1 files changed, 51 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/TotemFrameDecoder.java b/src/org/traccar/protocol/TotemFrameDecoder.java
new file mode 100644
index 000000000..84a14dac6
--- /dev/null
+++ b/src/org/traccar/protocol/TotemFrameDecoder.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2013 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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 java.nio.charset.Charset;
+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 TotemFrameDecoder extends FrameDecoder {
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx,
+ Channel channel,
+ ChannelBuffer buf) throws Exception {
+
+ // Check minimum length
+ if (buf.readableBytes() < 10) {
+ return null;
+ }
+
+ // Trim end line
+ if (buf.getUnsignedShort(buf.readerIndex()) == 0x0d0a) {
+ buf.skipBytes(2);
+ }
+
+ // Read message
+ int length = Integer.parseInt(buf.toString(2, 2, Charset.defaultCharset()), 16) + 1;
+ if (length >= buf.readableBytes()) {
+ return buf.readBytes(length);
+ }
+
+ return null;
+ }
+
+}