IP4 Router Alert option handling for IGMP

[vpp.git] / src / vnet / ip / ip4_packet.h

diff --git a/src/vnet/ip/ip4_packet.h b/src/vnet/ip/ip4_packet.h
index 2f0c75e..c41a802 100644 (file)
--- a/src/vnet/ip/ip4_packet.h
+++ b/src/vnet/ip/ip4_packet.h
@@ -193,6 +193,8 @@ typedef union
 #define IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS \
   ((4 << 4) | (sizeof (ip4_header_t) / sizeof (u32)))
 
+#define IP4_ROUTER_ALERT_OPTION 20
+
 always_inline int
 ip4_get_fragment_offset (ip4_header_t * i)
 {