Initial STB IND protocol support

3 files changed, 159 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/StbFrameDecoder.java b/src/main/java/org/traccar/protocol/StbFrameDecoder.java
new file mode 100644
index 000000000..6a4157f17
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/StbFrameDecoder.java
@@ -0,0 +1,55 @@
+/*
+ * 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;
+
+public class StbFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int startIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '{');
+        if (startIndex >= 0) {
+
+            buf.readerIndex(startIndex);
+
+            int currentIndex = startIndex + 1;
+            int nesting = 1;
+            while (currentIndex < buf.writerIndex() && nesting > 0) {
+                byte currentByte = buf.getByte(currentIndex);
+                if (currentByte == '{') {
+                    nesting += 1;
+                } else if (currentByte == '}') {
+                    nesting -= 1;
+                }
+                currentIndex += 1;
+            }
+
+            if (nesting == 0) {
+                return buf.readRetainedSlice(currentIndex - startIndex);
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/StbProtocol.java b/src/main/java/org/traccar/protocol/StbProtocol.java
new file mode 100644
index 000000000..ca95787d0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/StbProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * 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.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class StbProtocol extends BaseProtocol {
+
+    public StbProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StbFrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StbProtocolDecoder(StbProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/StbProtocolDecoder.java b/src/main/java/org/traccar/protocol/StbProtocolDecoder.java
new file mode 100644
index 000000000..7e25674b9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/StbProtocolDecoder.java
@@ -0,0 +1,66 @@
+/*
+ * 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 com.fasterxml.jackson.annotation.JsonProperty;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+
+import javax.json.Json;
+import javax.json.JsonObject;
+import java.io.StringReader;
+import java.net.SocketAddress;
+
+public class StbProtocolDecoder extends BaseProtocolDecoder {
+
+    public StbProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static class Response {
+        @JsonProperty("msgType")
+        private int type;
+        @JsonProperty("devId")
+        private String deviceId;
+        @JsonProperty("result")
+        private int result;
+        @JsonProperty("txnNo")
+        private String transaction;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        JsonObject root = Json.createReader(new StringReader((String) msg)).readObject();
+
+        Response response = new Response();
+        response.type = root.getInt("msgType");
+        response.deviceId = root.getString("devId");
+        response.result = 1;
+        response.transaction = root.getString("txnNo");
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(
+                    Context.getObjectMapper().writeValueAsString(response), remoteAddress));
+        }
+
+        return null;
+    }
+
+}