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-rw-r--r--src/main/java/org/traccar/protocol/SnapperFrameDecoder.java44
-rw-r--r--src/main/java/org/traccar/protocol/SnapperProtocol.java5
-rw-r--r--src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java10
3 files changed, 54 insertions, 5 deletions
diff --git a/src/main/java/org/traccar/protocol/SnapperFrameDecoder.java b/src/main/java/org/traccar/protocol/SnapperFrameDecoder.java
new file mode 100644
index 000000000..be45346a6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SnapperFrameDecoder.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2024 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;
+
+public class SnapperFrameDecoder extends BaseFrameDecoder {
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+ byte header = buf.getByte(buf.readerIndex());
+ if (header == 'P') {
+ if (buf.readableBytes() >= 2) {
+ return buf.readRetainedSlice(2);
+ }
+ } else if (buf.readableBytes() >= 16) {
+ int length = buf.getIntLE(buf.readerIndex() + 12) + 12 + 4 + 9;
+ if (buf.readableBytes() >= length) {
+ return buf.readRetainedSlice(length);
+ }
+ }
+
+ return null;
+ }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SnapperProtocol.java b/src/main/java/org/traccar/protocol/SnapperProtocol.java
index 2e294eac6..25a11ed3a 100644
--- a/src/main/java/org/traccar/protocol/SnapperProtocol.java
+++ b/src/main/java/org/traccar/protocol/SnapperProtocol.java
@@ -15,15 +15,12 @@
*/
package org.traccar.protocol;
-import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import jakarta.inject.Inject;
import org.traccar.BaseProtocol;
import org.traccar.PipelineBuilder;
import org.traccar.TrackerServer;
import org.traccar.config.Config;
-import java.nio.ByteOrder;
-
public class SnapperProtocol extends BaseProtocol {
@Inject
@@ -31,7 +28,7 @@ public class SnapperProtocol extends BaseProtocol {
addServer(new TrackerServer(config, getName(), false) {
@Override
protected void addProtocolHandlers(PipelineBuilder pipeline, Config config) {
- pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 12, 4, 9, 0, true));
+ pipeline.addLast(new SnapperFrameDecoder());
pipeline.addLast(new SnapperProtocolDecoder(SnapperProtocol.this));
}
});
diff --git a/src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java b/src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java
index e60736667..ef1a4426a 100644
--- a/src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java
@@ -150,7 +150,15 @@ public class SnapperProtocolDecoder extends BaseProtocolDecoder {
ByteBuf buf = (ByteBuf) msg;
- buf.readUnsignedByte(); // header
+ byte header = buf.readByte();
+ if (header == 'P') {
+ if (channel != null) {
+ ByteBuf response = Unpooled.wrappedBuffer(new byte[] {0x50, 0x4f});
+ channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+ }
+ return null;
+ }
+
buf.readUnsignedByte(); // protocol version
buf.readUnsignedIntLE(); // system bonus identifier