1 files changed, 62 insertions, 0 deletions
diff --git a/src/libfreeswan/subnettoa.c b/src/libfreeswan/subnettoa.c
new file mode 100644
index 000000000..36cad8b88
--- /dev/null
+++ b/src/libfreeswan/subnettoa.c
@@ -0,0 +1,62 @@
+/*
+ * convert binary form of subnet description to ASCII
+ * Copyright (C) 1998, 1999  Henry Spencer.
+ * 
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/lgpl.txt>.
+ * 
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
+ * License for more details.
+ *
+ * RCSID $Id: subnettoa.c,v 1.1 2004/03/15 20:35:26 as Exp $
+ */
+#include "internal.h"
+#include "freeswan.h"
+
+/*
+ - subnettoa - convert address and mask to ASCII "addr/mask"
+ * Output expresses the mask as a bit count if possible, else dotted decimal.
+ */
+size_t				/* space needed for full conversion */
+subnettoa(addr, mask, format, dst, dstlen)
+struct in_addr addr;
+struct in_addr mask;
+int format;			/* character */
+char *dst;			/* need not be valid if dstlen is 0 */
+size_t dstlen;
+{
+	size_t len;
+	size_t rest;
+	int n;
+	char *p;
+
+	switch (format) {
+	case 0:
+		break;
+	default:
+		return 0;
+		break;
+	}
+
+	len = addrtoa(addr, 0, dst, dstlen);
+	if (len < dstlen) {
+		dst[len - 1] = '/';
+		p = dst + len;
+		rest = dstlen - len;
+	} else {
+		p = NULL;
+		rest = 0;
+	}
+
+	n = masktobits(mask);
+	if (n >= 0)
+		len += ultoa((unsigned long)n, 10, p, rest);
+	else
+		len += addrtoa(mask, 0, p, rest);
+
+	return len;
+}