From b7145ea2e9d7efabb0d9806e76e7ac2995e56b27 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Fri, 20 Oct 2023 17:35:35 -0700
Subject: Fix DSM response handling

---
 .../java/org/traccar/protocol/DualcamProtocolDecoder.java     | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'src/main')

diff --git a/src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java b/src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java
index 5a6425e7e..f6712d7f2 100644
--- a/src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java
@@ -138,10 +138,13 @@ public class DualcamProtocolDecoder extends BaseProtocolDecoder {
                 break;
             case MSG_PATH_RESPONSE:
                 String file = buf.readCharSequence(buf.readUnsignedShort(), StandardCharsets.US_ASCII).toString();
-                ByteBuf response = Unpooled.buffer();
-                response.writeShort(MSG_FILE_REQUEST);
-                response.writeShort(file.length());
-                response.writeCharSequence(file, StandardCharsets.US_ASCII);
+                if (channel != null) {
+                    ByteBuf response = Unpooled.buffer();
+                    response.writeShort(MSG_FILE_REQUEST);
+                    response.writeShort(file.length());
+                    response.writeCharSequence(file, StandardCharsets.US_ASCII);
+                    channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+                }
                 break;
             default:
                 break;
-- 
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