VPP-632 : InBand OAM Analyser

Refer to jira ticket for more details.

Change-Id: I6facb9ef8553a21464f9a2e612706f152badbb68
Signed-off-by: AkshayaNadahalli <anadahal@cisco.com>
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 06c20bb..ae5c19b 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -49,6 +49,9 @@
 
 #include <vppinfra/bihash_template.c>
 
+/* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
+#define OI_DECAP   0x80000000
+
 /**
  * @file
  * @brief IPv6 Forwarding.