packets: Add ECN constants.

Upcoming tunnel code will be able to handle ECN encapsulation/
decapsulation in userspace.  This adds the necessary constants for ECN
manipulation.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Acked-by: Kyle Mestery <kmestery@cisco.com>

diff --git a/lib/packets.h b/lib/packets.h
index e5be1cb..24b51da 100644 (file)
--- a/lib/packets.h
+++ b/lib/packets.h
@@ -325,6 +325,10 @@ void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);
 #endif
 
 /* TOS fields. */
+#define IP_ECN_NOT_ECT 0x0
+#define IP_ECN_ECT_1 0x01
+#define IP_ECN_ECT_0 0x02
+#define IP_ECN_CE 0x03
 #define IP_ECN_MASK 0x03
 #define IP_DSCP_MASK 0xfc