diff options
Diffstat (limited to 'src/org/traccar/protocol/NavigilFrameDecoder.java')
-rw-r--r-- | src/org/traccar/protocol/NavigilFrameDecoder.java | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/src/org/traccar/protocol/NavigilFrameDecoder.java b/src/org/traccar/protocol/NavigilFrameDecoder.java deleted file mode 100644 index 34eb28941..000000000 --- a/src/org/traccar/protocol/NavigilFrameDecoder.java +++ /dev/null @@ -1,58 +0,0 @@ -/* - * Copyright 2013 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 NavigilFrameDecoder extends FrameDecoder { - - private static final int MESSAGE_HEADER = 20; - private static final long PREAMBLE = 0x2477F5F6; - - @Override - protected Object decode( - ChannelHandlerContext ctx, - Channel channel, - ChannelBuffer buf) throws Exception { - - // Check minimum length - if (buf.readableBytes() < MESSAGE_HEADER) { - return null; - } - - // Check for preamble - boolean hasPreamble = false; - if (buf.getUnsignedInt(buf.readerIndex()) == PREAMBLE) { - hasPreamble = true; - } - - // Check length and return buffer - int length = buf.getUnsignedShort(buf.readerIndex() + 6); - if (buf.readableBytes() >= length) { - if (hasPreamble) { - buf.readUnsignedInt(); - length -= 4; - } - return buf.readBytes(length); - } - - return null; - } - -} |