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-rw-r--r--src/org/traccar/protocol/UlbotechFrameDecoder.java41
-rw-r--r--src/org/traccar/protocol/UlbotechProtocolDecoder.java6
2 files changed, 31 insertions, 16 deletions
diff --git a/src/org/traccar/protocol/UlbotechFrameDecoder.java b/src/org/traccar/protocol/UlbotechFrameDecoder.java
index f0671c717..09c1db717 100644
--- a/src/org/traccar/protocol/UlbotechFrameDecoder.java
+++ b/src/org/traccar/protocol/UlbotechFrameDecoder.java
@@ -33,25 +33,36 @@ public class UlbotechFrameDecoder extends FrameDecoder {
return null;
}
- int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0xF8);
- if (index != -1) {
- ChannelBuffer result = ChannelBuffers.buffer(index + 1 - buf.readerIndex());
-
- while (buf.readerIndex() <= index) {
- int b = buf.readUnsignedByte();
- if (b == 0xF7) {
- int ext = buf.readUnsignedByte();
- if (ext == 0x00) {
- result.writeByte(0xF7);
- } else if (ext == 0x0F) {
- result.writeByte(0xF8);
+ if (buf.getUnsignedByte(buf.readerIndex()) == 0xF8) {
+
+ int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0xF8);
+ if (index != -1) {
+ ChannelBuffer result = ChannelBuffers.buffer(index + 1 - buf.readerIndex());
+
+ while (buf.readerIndex() <= index) {
+ int b = buf.readUnsignedByte();
+ if (b == 0xF7) {
+ int ext = buf.readUnsignedByte();
+ if (ext == 0x00) {
+ result.writeByte(0xF7);
+ } else if (ext == 0x0F) {
+ result.writeByte(0xF8);
+ }
+ } else {
+ result.writeByte(b);
}
- } else {
- result.writeByte(b);
}
+
+ return result;
+ }
+
+ } else {
+
+ int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '#');
+ if (index != -1) {
+ return buf.readBytes(index + 1 - buf.readerIndex());
}
- return result;
}
return null;
diff --git a/src/org/traccar/protocol/UlbotechProtocolDecoder.java b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
index 712444d95..3dc5b36cb 100644
--- a/src/org/traccar/protocol/UlbotechProtocolDecoder.java
+++ b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
@@ -101,7 +101,10 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
ChannelBuffer buf = (ChannelBuffer) msg;
- buf.readByte(); // header
+ if (buf.readUnsignedByte() != 0xF8) {
+ return null;
+ }
+
buf.readUnsignedByte(); // version
buf.readUnsignedByte(); // type
@@ -218,6 +221,7 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
if (hasLocation) {
return position;
}
+
return null;
}