Fix frame decoding issues

2 files changed, 6 insertions, 2 deletions

diff --git a/src/main/java/org/traccar/protocol/OmnicommFrameDecoder.java b/src/main/java/org/traccar/protocol/OmnicommFrameDecoder.java
index 1caf6ceb9..314f19757 100644
--- a/src/main/java/org/traccar/protocol/OmnicommFrameDecoder.java
+++ b/src/main/java/org/traccar/protocol/OmnicommFrameDecoder.java
@@ -27,11 +27,11 @@ public class OmnicommFrameDecoder extends BaseFrameDecoder {
     protected Object decode(
             ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
 
-        if (buf.readableBytes() < 10) {
+        if (buf.readableBytes() < 6) {
             return null;
         }
 
-        int endIndex = buf.getUnsignedShortLE(2) + buf.readerIndex() + 6;
+        int endIndex = buf.getUnsignedShortLE(buf.readerIndex() + 2) + buf.readerIndex() + 6;
         if (buf.writerIndex() < endIndex) {
             return null;
         }
diff --git a/src/test/java/org/traccar/protocol/OmnicommFrameDecoderTest.java b/src/test/java/org/traccar/protocol/OmnicommFrameDecoderTest.java
index 06c6e24eb..ae21de107 100644
--- a/src/test/java/org/traccar/protocol/OmnicommFrameDecoderTest.java
+++ b/src/test/java/org/traccar/protocol/OmnicommFrameDecoderTest.java
@@ -11,6 +11,10 @@ public class OmnicommFrameDecoderTest extends ProtocolTest {
         OmnicommFrameDecoder decoder = new OmnicommFrameDecoder();
 
         verifyFrame(
+                binary("c08600004566"),
+                decoder.decode(null, null, binary("c08600004566")));
+
+        verifyFrame(
                 binary("c080080061a61915340100001dec"),
                 decoder.decode(null, null, binary("c080080061a61915340100001dec")));