1 files changed, 2 insertions, 0 deletions
diff --git a/lib/ip.h b/lib/ip.h
index 87cd3aa9..5bf56fc3 100644
--- a/lib/ip.h
+++ b/lib/ip.h
@@ -15,6 +15,8 @@
 #include "ipv6.h"
 #endif
 
+#define ipa_in_net(x,n,p) (!ipa_nonzero(ipa_and(ipa_xor((n),(x)),ipa_mkmask(p))))
+
 /*
  *	ip_classify() returns either a negative number for invalid addresses
  *	or scope OR'ed together with address type.