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authorStefan Clark <stefanclark@gmail.com>2022-07-25 06:50:59 +0000
committerStefan Clark <stefanclark@gmail.com>2022-07-25 07:18:00 +0000
commit032d02b584553f4374c4bc6ae9f7c8e819595c42 (patch)
tree3481d2bf106fe29455687ee8a5f60c3e844703c3 /src/main/java/org/traccar/protocol/Xexun2ProtocolEncoder.java
parent14dafcb4191ec25fa22494956cd509708a9e1b5c (diff)
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Xexun2 Encoder - Initial Code
Diffstat (limited to 'src/main/java/org/traccar/protocol/Xexun2ProtocolEncoder.java')
-rw-r--r--src/main/java/org/traccar/protocol/Xexun2ProtocolEncoder.java121
1 files changed, 121 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/Xexun2ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Xexun2ProtocolEncoder.java
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+++ b/src/main/java/org/traccar/protocol/Xexun2ProtocolEncoder.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2016 - 2022 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.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
+import org.traccar.model.Command;
+import org.traccar.Protocol;
+
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+
+public class Xexun2ProtocolEncoder extends BaseProtocolEncoder {
+
+ public Xexun2ProtocolEncoder(Protocol protocol) {
+ super(protocol);
+ }
+
+ private static ByteBuf encodeFrame(ByteBuf buf) {
+ buf.clear();
+ if (buf.readableBytes() < 5) {
+ return null;
+ }
+
+ ByteBuf result = Unpooled.buffer();
+
+ result.writeBytes(buf.readBytes(2));
+
+ while (buf.readerIndex() < buf.capacity() - 2) {
+ int b = buf.readUnsignedByte();
+ if (b == 0xfa && buf.isReadable() && buf.getUnsignedByte(buf.readerIndex()) == 0xaf) {
+ buf.readUnsignedByte();
+ result.writeByte(0xfb);
+ result.writeByte(0xbf);
+ result.writeByte(0x01);
+ } else if (b == 0xfb && buf.isReadable() && buf.getUnsignedByte(buf.readerIndex()) == 0xbf) {
+ buf.readUnsignedByte();
+ result.writeByte(0xfb);
+ result.writeByte(0xbf);
+ result.writeByte(0x02);
+ } else {
+ result.writeByte(b);
+ }
+ }
+ result.writeBytes(buf.readBytes(2));
+
+ return result;
+ }
+
+ private static int checksum(byte[] data)
+ {
+ int sum = 0;
+ int len = data.length;
+ for (int j = 0; len > 1; len--) {
+ sum += data[j++] & 0xff;
+ if ((sum & 0x80000000) > 0) {
+ sum = (sum & 0xffff) + (sum >> 16);
+ }
+ }
+ if (len == 1) {
+ sum += data[data.length - 1] & 0xff;
+ }
+ while ((sum >> 16) > 0) {
+ sum = (sum & 0xffff) + sum >> 16;
+ }
+ sum = (sum == 0xffff) ? sum & 0xffff : (~sum) & 0xffff;
+ return sum;
+ }
+
+
+ private static ByteBuf encodeContent(String uniqueId, String content) {
+ ByteBuf buf = Unpooled.buffer();
+
+ byte[] message = content.getBytes();
+
+ buf.writeShort(0xFAAF);
+ buf.writeShort(0x0007);
+ buf.writeShort(0x0001);
+ buf.writeBytes(DataConverter.parseHex(uniqueId + "0"),0,8);
+ buf.writeShort(message.length);
+ buf.writeShort(checksum(message));
+ buf.writeBytes(message);
+ buf.writeShort(0xFAAF);
+
+ return encodeFrame(buf);
+ }
+
+ @Override
+ protected Object encodeCommand(Command command) {
+ String uniqueId = getUniqueId(command.getDeviceId());
+
+ switch (command.getType()) {
+ case Command.TYPE_CUSTOM:
+ return encodeContent(uniqueId, command.getString(Command.KEY_DATA));
+ case Command.TYPE_POSITION_PERIODIC:
+ return encodeContent(uniqueId, String.format("tracking_send=%1$d,%1$d", command.getInteger(Command.KEY_FREQUENCY)));
+ case Command.TYPE_POWER_OFF:
+ return encodeContent(uniqueId, "of=1");
+ case Command.TYPE_REBOOT_DEVICE:
+ return encodeContent(uniqueId, "reset");
+ default:
+ return null;
+ }
+ }
+
+}