diff options
Diffstat (limited to 'src/main/java/org/traccar')
3 files changed, 81 insertions, 5 deletions
diff --git a/src/main/java/org/traccar/protocol/NavtelecomFrameDecoder.java b/src/main/java/org/traccar/protocol/NavtelecomFrameDecoder.java new file mode 100644 index 000000000..0fb82528b --- /dev/null +++ b/src/main/java/org/traccar/protocol/NavtelecomFrameDecoder.java @@ -0,0 +1,75 @@ +/* + * Copyright 2021 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; +import org.traccar.BasePipelineFactory; + +import java.nio.charset.StandardCharsets; +import java.util.BitSet; + +public class NavtelecomFrameDecoder extends BaseFrameDecoder { + + @Override + protected Object decode( + ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception { + + if (buf.getByte(buf.readerIndex()) == '@') { + + int length = buf.getUnsignedShortLE(12) + 12 + 2 + 2; + if (buf.readableBytes() >= length) { + return buf.readRetainedSlice(length); + } + + } else { + + NavtelecomProtocolDecoder protocolDecoder = + BasePipelineFactory.getHandler(ctx.pipeline(), NavtelecomProtocolDecoder.class); + if (protocolDecoder == null) { + throw new RuntimeException("Decoder not found"); + } + + String type = buf.getCharSequence(buf.readerIndex(), 2, StandardCharsets.US_ASCII).toString(); + BitSet bits = protocolDecoder.getBits(); + + if (type.equals("~A")) { + int count = buf.getUnsignedByte(buf.readerIndex() + 2); + int length = 2 + 1 + 1; + + for (int i = 0; i < count; i++) { + for (int j = 0; j < bits.length(); j++) { + if (bits.get(j)) { + length += NavtelecomProtocolDecoder.getItemLength(j + 1); + } + } + } + + if (buf.readableBytes() >= length) { + return buf.readRetainedSlice(length); + } + } else { + throw new UnsupportedOperationException("Unsupported message type: " + type); + } + + } + + return null; + } + +} diff --git a/src/main/java/org/traccar/protocol/NavtelecomProtocol.java b/src/main/java/org/traccar/protocol/NavtelecomProtocol.java index 24bfbf895..29ce8c41e 100644 --- a/src/main/java/org/traccar/protocol/NavtelecomProtocol.java +++ b/src/main/java/org/traccar/protocol/NavtelecomProtocol.java @@ -15,20 +15,17 @@ */ package org.traccar.protocol; -import io.netty.handler.codec.LengthFieldBasedFrameDecoder; import org.traccar.BaseProtocol; import org.traccar.PipelineBuilder; import org.traccar.TrackerServer; -import java.nio.ByteOrder; - public class NavtelecomProtocol extends BaseProtocol { public NavtelecomProtocol() { addServer(new TrackerServer(false, getName()) { @Override protected void addProtocolHandlers(PipelineBuilder pipeline) { - pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 65535, 12, 2, 2, 0, true)); + pipeline.addLast(new NavtelecomFrameDecoder()); pipeline.addLast(new NavtelecomProtocolDecoder(NavtelecomProtocol.this)); } }); diff --git a/src/main/java/org/traccar/protocol/NavtelecomProtocolDecoder.java b/src/main/java/org/traccar/protocol/NavtelecomProtocolDecoder.java index c469025c2..bdcc12c4c 100644 --- a/src/main/java/org/traccar/protocol/NavtelecomProtocolDecoder.java +++ b/src/main/java/org/traccar/protocol/NavtelecomProtocolDecoder.java @@ -95,7 +95,7 @@ public class NavtelecomProtocolDecoder extends BaseProtocolDecoder { private BitSet bits; - private static int getItemLength(int id) { + public static int getItemLength(int id) { Integer length = ITEM_LENGTH_MAP.get(id); if (length == null) { throw new IllegalArgumentException(String.format("Unknown item: %d", id)); @@ -103,6 +103,10 @@ public class NavtelecomProtocolDecoder extends BaseProtocolDecoder { return length; } + public BitSet getBits() { + return bits; + } + private void sendResponse( Channel channel, SocketAddress remoteAddress, int receiver, int sender, ByteBuf content) { if (channel != null) { |