aboutsummaryrefslogtreecommitdiff
path: root/src/main/java/org/traccar/protocol/MegastekFrameDecoder.java
diff options
context:
space:
mode:
authorAnton Tananaev <anton.tananaev@gmail.com>2019-03-31 22:35:39 -0700
committerAnton Tananaev <anton.tananaev@gmail.com>2019-03-31 22:35:39 -0700
commit59416923dcb3a756eaf532cc4259f2f6625c0762 (patch)
tree9082dae6616deac8fda432b7bfd80e4a52b6d9dc /src/main/java/org/traccar/protocol/MegastekFrameDecoder.java
parent79a129dd6327d932133d6b9a50190d3f4927bff9 (diff)
downloadtrackermap-server-59416923dcb3a756eaf532cc4259f2f6625c0762.tar.gz
trackermap-server-59416923dcb3a756eaf532cc4259f2f6625c0762.tar.bz2
trackermap-server-59416923dcb3a756eaf532cc4259f2f6625c0762.zip
Convert project to gradle
Diffstat (limited to 'src/main/java/org/traccar/protocol/MegastekFrameDecoder.java')
-rw-r--r--src/main/java/org/traccar/protocol/MegastekFrameDecoder.java59
1 files changed, 59 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/MegastekFrameDecoder.java b/src/main/java/org/traccar/protocol/MegastekFrameDecoder.java
new file mode 100644
index 000000000..347fa24b1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MegastekFrameDecoder.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2015 - 2018 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.helper.BufferUtil;
+
+import java.nio.charset.StandardCharsets;
+
+public class MegastekFrameDecoder extends BaseFrameDecoder {
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+ if (buf.readableBytes() < 10) {
+ return null;
+ }
+
+ if (Character.isDigit(buf.getByte(buf.readerIndex()))) {
+ int length = 4 + Integer.parseInt(buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII));
+ if (buf.readableBytes() >= length) {
+ return buf.readRetainedSlice(length);
+ }
+ } else {
+ while (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n') {
+ buf.skipBytes(1);
+ }
+ int delimiter = BufferUtil.indexOf("\r\n", buf);
+ if (delimiter == -1) {
+ delimiter = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '!');
+ }
+ if (delimiter != -1) {
+ ByteBuf result = buf.readRetainedSlice(delimiter - buf.readerIndex());
+ buf.skipBytes(1);
+ return result;
+ }
+ }
+
+ return null;
+ }
+
+}