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-rw-r--r--lib/prefix.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/prefix.h b/lib/prefix.h
index 5f1ff05c..1cb91b2a 100644
--- a/lib/prefix.h
+++ b/lib/prefix.h
@@ -112,6 +112,7 @@ struct prefix_rd
#define IPV4_NET0(a) ((((u_int32_t) (a)) & 0xff000000) == 0x00000000)
#define IPV4_NET127(a) ((((u_int32_t) (a)) & 0xff000000) == 0x7f000000)
#define IPV4_LINKLOCAL(a) ((((u_int32_t) (a)) & 0xffff0000) == 0xa9fe0000)
+#define IPV4_CLASS_DE(a) ((u_int32_t) (a) >= 0xe0000000)
/* Max bit/byte length of IPv6 address. */
#define IPV6_MAX_BYTELEN 16