diff options
Diffstat (limited to 'src/main/java/org/traccar/handler/protocol/Arnavi4FrameDecoder.java')
-rw-r--r-- | src/main/java/org/traccar/handler/protocol/Arnavi4FrameDecoder.java | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/src/main/java/org/traccar/handler/protocol/Arnavi4FrameDecoder.java b/src/main/java/org/traccar/handler/protocol/Arnavi4FrameDecoder.java deleted file mode 100644 index b13f3fd7d..000000000 --- a/src/main/java/org/traccar/handler/protocol/Arnavi4FrameDecoder.java +++ /dev/null @@ -1,74 +0,0 @@ -/* - * Copyright 2017 Ivan Muratov (binakot@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 Arnavi4FrameDecoder extends FrameDecoder { - - private static final int MIN_LENGTH = 4; - private static final int HEADER_LENGTH = 10; - private static final int PACKET_WRAPPER_LENGTH = 8; - private static final int COMMAND_ANSWER_PACKET_LENGTH = 4; - private static final int COMMAND_ANSWER_PARCEL_NUMBER = 0xfd; - private static final byte PACKAGE_END_SIGN = 0x5d; - - private boolean firstPacket = true; - - @Override - protected Object decode( - ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception { - - if (buf.readableBytes() < MIN_LENGTH) { - return null; - } - - int length; - if (firstPacket) { - firstPacket = false; - length = HEADER_LENGTH; - } else { - int index = buf.getUnsignedByte(1); // parcel number - if (index == COMMAND_ANSWER_PARCEL_NUMBER) { - length = COMMAND_ANSWER_PACKET_LENGTH; - } else { - int pos = 2; // start sign + parcel number - while (pos + PACKET_WRAPPER_LENGTH < buf.readableBytes() - && buf.getByte(pos) != PACKAGE_END_SIGN) { - - int dataLength = buf.getUnsignedShort(pos + 1); - pos += PACKET_WRAPPER_LENGTH + dataLength; // packet type + data length + unixtime + data + crc - } - - if (buf.getByte(pos) != PACKAGE_END_SIGN) { // end sign - return null; - } - - length = pos + 1; - } - } - - if (buf.readableBytes() >= length) { - return buf.readBytes(length); - } - - return null; - } - -} |