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Diffstat (limited to 'include/uapi/linux/if_tunnel.h')
-rw-r--r--include/uapi/linux/if_tunnel.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/if_tunnel.h b/include/uapi/linux/if_tunnel.h
index 9865c8caedde..fb7337d6b985 100644
--- a/include/uapi/linux/if_tunnel.h
+++ b/include/uapi/linux/if_tunnel.h
@@ -39,6 +39,7 @@
#define GRE_IS_REC(f) ((f) & GRE_REC)
#define GRE_IS_ACK(f) ((f) & GRE_ACK)
+#define GRE_VERSION_0 __cpu_to_be16(0x0000)
#define GRE_VERSION_1 __cpu_to_be16(0x0001)
#define GRE_PROTO_PPP __cpu_to_be16(0x880b)
#define GRE_PPTP_KEY_MASK __cpu_to_be32(0xffff)