1 files changed, 94 insertions, 0 deletions
diff --git a/src/libfreeswan/addrtypeof.c b/src/libfreeswan/addrtypeof.c
new file mode 100644
index 000000000..e63509911
--- /dev/null
+++ b/src/libfreeswan/addrtypeof.c
@@ -0,0 +1,94 @@
+/*
+ * extract parts of an ip_address
+ * Copyright (C) 2000  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: addrtypeof.c,v 1.1 2004/03/15 20:35:25 as Exp $
+ */
+#include "internal.h"
+#include "freeswan.h"
+
+/*
+ - addrtypeof - get the type of an ip_address
+ */
+int
+addrtypeof(src)
+const ip_address *src;
+{
+	return src->u.v4.sin_family;
+}
+
+/*
+ - addrbytesptr - get pointer to the address bytes of an ip_address
+ */
+size_t				/* 0 for error */
+addrbytesptr(src, dstp)
+const ip_address *src;
+const unsigned char **dstp;	/* NULL means just a size query */
+{
+	const unsigned char *p;
+	size_t n;
+
+	switch (src->u.v4.sin_family) {
+	case AF_INET:
+		p = (const unsigned char *)&src->u.v4.sin_addr.s_addr;
+		n = 4;
+		break;
+	case AF_INET6:
+		p = (const unsigned char *)&src->u.v6.sin6_addr;
+		n = 16;
+		break;
+	default:
+		return 0;
+		break;
+	}
+
+	if (dstp != NULL)
+		*dstp = p;
+	return n;
+}
+
+/*
+ - addrlenof - get length of the address bytes of an ip_address
+ */
+size_t				/* 0 for error */
+addrlenof(src)
+const ip_address *src;
+{
+	return addrbytesptr(src, NULL);
+}
+
+/*
+ - addrbytesof - get the address bytes of an ip_address
+ */
+size_t				/* 0 for error */
+addrbytesof(src, dst, dstlen)
+const ip_address *src;
+unsigned char *dst;
+size_t dstlen;
+{
+	const unsigned char *p;
+	size_t n;
+	size_t ncopy;
+
+	n = addrbytesptr(src, &p);
+	if (n == 0)
+		return 0;
+
+	if (dstlen > 0) {
+		ncopy = n;
+		if (ncopy > dstlen)
+			ncopy = dstlen;
+		memcpy(dst, p, ncopy);
+	}
+	return n;
+}