--- a/ifaddrs.h
+++ b/ifaddrs.h
@@ -0,0 +1,63 @@
+/* 	$Id: ifaddrs.h,v 1.1.1.1 2003/01/16 15:41:11 root Exp $	*/
+/*	from USAGI: ifaddrs.h,v 1.1 2001/01/26 07:11:48 yoshfuji Exp	*/
+
+/*
+ * Copyright (c) 1995, 1999
+ *	Berkeley Software Design, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	BSDI ifaddrs.h,v 2.5 2000/02/23 14:51:59 dab Exp
+ */
+
+#ifndef	_IFADDRS_H
+#define	_IFADDRS_H
+
+struct ifaddrs {
+	struct ifaddrs  *ifa_next;
+	char		*ifa_name;
+	unsigned short	 ifa_flags;
+	struct sockaddr	*ifa_addr;
+	struct sockaddr	*ifa_netmask;
+	union{
+	    struct sockaddr *ifu_broadaddr;
+	    struct sockaddr *ifu_dstaddr;
+	} ifa_ifu;
+	void		*ifa_data;
+};
+
+/*
+ * This may have been defined in <net/if.h>.  Note that if <net/if.h> is
+ * to be included it must be included before this header file.
+ */
+#ifndef	ifa_broadaddr
+#define	ifa_broadaddr	ifa_ifu.ifu_broadaddr	/* broadcast address */
+#endif
+#ifndef	ifa_dstaddr
+#define	ifa_dstaddr	ifa_ifu.ifu_dstaddr	/* other end of link */
+#endif
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+extern int getifaddrs __P((struct ifaddrs **));
+extern void freeifaddrs __P((struct ifaddrs *));
+__END_DECLS
+
+#endif	/* _IFADDRS_H */