Implement Omnicomm protocol

1 files changed, 116 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/OmnicommProtocolDecoder.java b/src/main/java/org/traccar/protocol/OmnicommProtocolDecoder.java
new file mode 100644
index 000000000..7d237e705
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OmnicommProtocolDecoder.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2019 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.google.protobuf.InvalidProtocolBufferException;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+import org.traccar.protobuf.OmnicommMessageOuterClass;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class OmnicommProtocolDecoder extends BaseProtocolDecoder {
+
+    public OmnicommProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_IDENTIFICATION = 0x80;
+    public static final int MSG_CONTAINER_IM = 0x86;
+
+    private OmnicommMessageOuterClass.OmnicommMessage parseProto(
+            ByteBuf buf, int length) throws InvalidProtocolBufferException {
+
+        final byte[] array;
+        final int offset;
+        if (buf.hasArray()) {
+            array = buf.array();
+            offset = buf.arrayOffset() + buf.readerIndex();
+        } else {
+            array = ByteBufUtil.getBytes(buf, buf.readerIndex(), length, false);
+            offset = 0;
+        }
+        buf.skipBytes(length);
+
+        return OmnicommMessageOuterClass.OmnicommMessage
+                .getDefaultInstance().getParserForType().parseFrom(array, offset, length);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // prefix
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedShortLE(); // length
+
+        if (type == MSG_IDENTIFICATION) {
+
+            getDeviceSession(channel, remoteAddress, String.valueOf(buf.readUnsignedIntLE()));
+
+        } else if (type == MSG_CONTAINER_IM) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            buf.readUnsignedIntLE(); // record number
+            buf.readUnsignedIntLE(); // time
+            buf.readUnsignedByte(); // priority
+
+            List<Position> positions = new LinkedList<>();
+
+            while (buf.readableBytes() > 2) {
+
+                OmnicommMessageOuterClass.OmnicommMessage message = parseProto(buf, buf.readUnsignedShortLE());
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                if (message.hasNAV()) {
+                    OmnicommMessageOuterClass.OmnicommMessage.NAV nav = message.getNAV();
+                    position.setValid(true);
+                    position.setTime(new Date((nav.getGPSTime() + 1230768000) * 1000L)); // from 2009-01-01 12:00
+                    position.setLatitude(nav.getLAT() * 0.0000001);
+                    position.setLongitude(nav.getLON() * 0.0000001);
+                    position.setSpeed(UnitsConverter.knotsFromKph(nav.getGPSVel() * 0.1));
+                    position.setCourse(nav.getGPSDir());
+                    position.setAltitude(nav.getGPSAlt() * 0.1);
+                    position.set(Position.KEY_SATELLITES, nav.getGPSNSat());
+                }
+
+                positions.add(position);
+            }
+
+            return positions;
+        }
+
+        return null;
+    }
+
+}