diff --git a/Makefile b/Makefile
index dac7d8ef..eac53cc9 100644
--- a/Makefile
+++ b/Makefile
@@ -697,6 +697,7 @@ LIB_C_FILES += freebsd/lib/libc/net/nsdispatch.c
 LIB_C_FILES += freebsd/lib/libc/net/rcmd.c
 LIB_C_FILES += freebsd/lib/libc/net/recv.c
 LIB_C_FILES += freebsd/lib/libc/net/send.c
+LIB_C_FILES += freebsd/lib/libc/net/vars.c
 LIB_C_FILES += freebsd/lib/libc/posix1e/mac.c
 LIB_C_FILES += freebsd/lib/libc/resolv/h_errno.c
 LIB_C_FILES += freebsd/lib/libc/resolv/herror.c
diff --git a/freebsd-to-rtems.py b/freebsd-to-rtems.py
index b77f0155..3d5c2429 100755
--- a/freebsd-to-rtems.py
+++ b/freebsd-to-rtems.py
@@ -2214,6 +2214,7 @@ userSpace.addUserSpaceSourceFiles(
 		'lib/libc/net/rcmd.c',
 		'lib/libc/net/recv.c',
 		'lib/libc/net/send.c',
+		'lib/libc/net/vars.c',
 		'lib/libc/posix1e/mac.c',
 		'lib/libc/resolv/h_errno.c',
 		'lib/libc/resolv/herror.c',
diff --git a/freebsd/lib/libc/include/port_after.h b/freebsd/lib/libc/include/port_after.h
index e69de29b..94f3a643 100644
--- a/freebsd/lib/libc/include/port_after.h
+++ b/freebsd/lib/libc/include/port_after.h
@@ -0,0 +1,11 @@
+/* $FreeBSD$ */
+
+#ifndef _PORT_AFTER_H_
+#define _PORT_AFTER_H_
+
+#define HAVE_SA_LEN		1
+#define HAS_INET6_STRUCTS	1
+#define HAVE_SIN6_SCOPE_ID	1
+#define HAVE_TIME_R		1
+
+#endif /* _PORT_AFTER_H_ */
diff --git a/freebsd/lib/libc/include/port_before.h b/freebsd/lib/libc/include/port_before.h
index 304dd66d..beef71d0 100644
--- a/freebsd/lib/libc/include/port_before.h
+++ b/freebsd/lib/libc/include/port_before.h
@@ -17,6 +17,6 @@
                 var = _u.v; \
         } while (0)
 
-#define UNUSED(x) (void)(x)
+#define UNUSED(x) (x) = (x)
 
 #endif /* _PORT_BEFORE_H_ */
diff --git a/freebsd/lib/libc/net/vars.c b/freebsd/lib/libc/net/vars.c
new file mode 100644
index 00000000..22136cd3
--- /dev/null
+++ b/freebsd/lib/libc/net/vars.c
@@ -0,0 +1,45 @@
+/*	$KAME: vars.c,v 1.2 2001/08/20 02:32:41 itojun Exp $	*/
+
+/*
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+ * 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.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 THE PROJECT OR CONTRIBUTORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <rtems/bsd/sys/types.h>
+#include <netinet/in.h>
+
+/*
+ * Definitions of some costant IPv6 addresses.
+ */
+const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
+const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
+const struct in6_addr in6addr_nodelocal_allnodes = IN6ADDR_NODELOCAL_ALLNODES_INIT;
+const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
+