Add uapi define for MPLS over IP.

Acked-by: Jiri Pirko <j...@resnulli.us>
Signed-off-by: Tom Herbert <t...@herbertland.com>
---
 include/uapi/linux/in.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/in.h b/include/uapi/linux/in.h
index 589ced0..641338b 100644
--- a/include/uapi/linux/in.h
+++ b/include/uapi/linux/in.h
@@ -69,6 +69,8 @@ enum {
 #define IPPROTO_SCTP           IPPROTO_SCTP
   IPPROTO_UDPLITE = 136,       /* UDP-Lite (RFC 3828)                  */
 #define IPPROTO_UDPLITE                IPPROTO_UDPLITE
+  IPPROTO_MPLS = 137,          /* MPLS in IP (RFC 4023)                */
+#define IPPROTO_MPLS           IPPROTO_MPLS
   IPPROTO_RAW = 255,           /* Raw IP packets                       */
 #define IPPROTO_RAW            IPPROTO_RAW
   IPPROTO_MAX
-- 
1.8.1

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