1 files changed, 25 insertions, 0 deletions
diff --git a/contrib/xntpd/lib/netof.c b/contrib/xntpd/lib/netof.c
new file mode 100644
index 000000000000..286a5846eb40
--- /dev/null
+++ b/contrib/xntpd/lib/netof.c
@@ -0,0 +1,25 @@
+/* 
+ * netof - return the net address part of an ip address
+ *         (zero out host part)
+ */
+#include <stdio.h>
+
+#include "ntp_fp.h"
+#include "ntp_stdlib.h"
+
+U_LONG
+netof(num)
+	U_LONG num;
+{
+	register U_LONG netnum;
+
+	netnum = num;
+
+	if(IN_CLASSC(netnum))
+		netnum &= IN_CLASSC_NET;
+	else if (IN_CLASSB(netnum))
+		netnum &= IN_CLASSB_NET;
+	else			/* treat als other like class A */
+		netnum &= IN_CLASSA_NET;
+	return netnum;
+}