aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/protocol/AutoFonFrameDecoder.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/org/traccar/protocol/AutoFonFrameDecoder.java')
-rw-r--r--src/org/traccar/protocol/AutoFonFrameDecoder.java61
1 files changed, 61 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/AutoFonFrameDecoder.java b/src/org/traccar/protocol/AutoFonFrameDecoder.java
new file mode 100644
index 000000000..f4b5c8f0b
--- /dev/null
+++ b/src/org/traccar/protocol/AutoFonFrameDecoder.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2015 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 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 AutoFonFrameDecoder extends FrameDecoder {
+
+ private static final int MSG_LOGIN = 0x10;
+ private static final int MSG_LOCATION = 0x11;
+ private static final int MSG_HISTORY = 0x12;
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx,
+ Channel channel,
+ ChannelBuffer buf) throws Exception {
+
+ // Check minimum length
+ if (buf.readableBytes() < 12) {
+ return null;
+ }
+
+ int length = 0;
+ switch (buf.getUnsignedByte(buf.readerIndex())) {
+ case MSG_LOGIN:
+ length = 12;
+ break;
+ case MSG_LOCATION:
+ length = 78;
+ break;
+ case MSG_HISTORY:
+ length = 257;
+ break;
+ }
+
+ // Check length and return buffer
+ if (length != 0 && buf.readableBytes() >= length) {
+ return buf.readBytes(length);
+ }
+
+ return null;
+ }
+
+}