X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=replicate%2Fmdsal-replicate-netty%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fmdsal%2Freplicate%2Fnetty%2FConstants.java;h=e7f42eb19c1a2c31acd322f0dee6fd5401d891e8;hb=2cbcb2d8589805bcb053462176424dae2b53cd1a;hp=1fff84f4e5df84f7da57dd967cc6ded774d0c637;hpb=a2f2028f4d111e77ca542d2bc2110f38fafd82fb;p=mdsal.git

diff --git a/replicate/mdsal-replicate-netty/src/main/java/org/opendaylight/mdsal/replicate/netty/Constants.java b/replicate/mdsal-replicate-netty/src/main/java/org/opendaylight/mdsal/replicate/netty/Constants.java
index 1fff84f4e5..e7f42eb19c 100644
--- a/replicate/mdsal-replicate-netty/src/main/java/org/opendaylight/mdsal/replicate/netty/Constants.java
+++ b/replicate/mdsal-replicate-netty/src/main/java/org/opendaylight/mdsal/replicate/netty/Constants.java
@@ -32,6 +32,10 @@ final class Constants {
      * End-of-DataTreeCandidate serialization stream. The payload is empty.
      */
     static final byte MSG_DTC_APPLY     = 4;
+    /**
+     * Verify the connection is alive.
+     */
+    static final int MSG_PING           = 5;
 
     /**
      * Length of the length field in each transmitted frame.
@@ -47,6 +51,9 @@ final class Constants {
 
     static final ByteBuf DTC_APPLY = Unpooled.unreleasableBuffer(Unpooled.wrappedBuffer(new byte[] { MSG_DTC_APPLY }));
 
+    static final ByteBuf PING = Unpooled.unreleasableBuffer(
+        Unpooled.wrappedBuffer(new byte[] { MSG_PING }));
+
     private Constants() {
         // Hidden on purpose
     }