diff --git a/tests/sys/netinet/libalias/util.h b/tests/sys/netinet/libalias/util.h
index 81d71049b57f..fcec225af658 100644
--- a/tests/sys/netinet/libalias/util.h
+++ b/tests/sys/netinet/libalias/util.h
@@ -1,137 +1,137 @@
 /*
  * SPDX-License-Identifier: BSD-3-Clause
  *
  * Copyright 2021 Lutz Donnerhacke
  *
  * 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 copyright holder 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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/types.h>
 
 #include <arpa/inet.h>
 #include <netinet/ip.h>
 #include <netinet/udp.h>
 
 #ifndef _UTIL_H
 #define _UTIL_H
 
 /* common ip ranges */
 extern struct in_addr masq, pub, prv1, prv2, prv3, cgn, ext, ANY_ADDR;
 
 int		randcmp(const void *a, const void *b);
 void		hexdump(void *p, size_t len);
 struct ip *	ip_packet(u_char protocol, size_t len);
 struct udphdr * set_udp(struct ip *p, u_short sport, u_short dport);
 
-inline int
+static inline int
 addr_eq(struct in_addr a, struct in_addr b)
 {
 	return a.s_addr == b.s_addr;
 }
 
 #define a2h(a)	ntohl(a.s_addr)
 
-inline int
+static inline int
 rand_range(int min, int max)
 {
 	return min + rand()%(max - min);
 }
 
 #define NAT_CHECK(pip, src, dst, msq)	do {	\
 	int res;				\
 	int len = ntohs(pip->ip_len);		\
 	pip->ip_src = src;			\
 	pip->ip_dst = dst;			\
 	res = LibAliasOut(la, pip, len);	\
 	ATF_CHECK_MSG(res == PKT_ALIAS_OK,	\
 	    ">%d< not met PKT_ALIAS_OK", res);	\
 	ATF_CHECK(addr_eq(msq, pip->ip_src));	\
 	ATF_CHECK(addr_eq(dst, pip->ip_dst));	\
 } while(0)
 
 #define NAT_FAIL(pip, src, dst)	do {		\
 	int res;				\
 	int len = ntohs(pip->ip_len);		\
 	pip->ip_src = src;			\
 	pip->ip_dst = dst;			\
 	res = LibAliasOut(la, pip, len);	\
 	ATF_CHECK_MSG(res != PKT_ALIAS_OK),	\
 	    ">%d< not met !PKT_ALIAS_OK", res);	\
 	ATF_CHECK(addr_eq(src, pip->ip_src));	\
 	ATF_CHECK(addr_eq(dst, pip->ip_dst));	\
 } while(0)
 
 #define UNNAT_CHECK(pip, src, dst, rel)	do {	\
 	int res;				\
 	int len = ntohs(pip->ip_len);		\
 	pip->ip_src = src;			\
 	pip->ip_dst = dst;			\
 	res = LibAliasIn(la, pip, len);		\
 	ATF_CHECK_MSG(res == PKT_ALIAS_OK,	\
 	    ">%d< not met PKT_ALIAS_OK", res);	\
 	ATF_CHECK(addr_eq(src, pip->ip_src));	\
 	ATF_CHECK(addr_eq(rel, pip->ip_dst));	\
 } while(0)
 
 #define UNNAT_FAIL(pip, src, dst)	do {	\
 	int res;				\
 	int len = ntohs(pip->ip_len);		\
 	pip->ip_src = src;			\
 	pip->ip_dst = dst;			\
 	res = LibAliasIn(la, pip, len);		\
 	ATF_CHECK_MSG(res != PKT_ALIAS_OK,	\
 	    ">%d< not met !PKT_ALIAS_OK", res);	\
 	ATF_CHECK(addr_eq(src, pip->ip_src));	\
 	ATF_CHECK(addr_eq(dst, pip->ip_dst));	\
 } while(0)
 
 #define UDP_NAT_CHECK(p, u, si, sp, di, dp, mi)	do {	\
 	u = set_udp(p, (sp), (dp));			\
 	NAT_CHECK(p, (si), (di), (mi));			\
 	ATF_CHECK(u->uh_dport == htons(dp));		\
 } while(0)
 
 #define UDP_NAT_FAIL(p, u, si, sp, di, dp)	do {	\
 	u = set_udp(p, (sp), (dp));			\
 	NAT_FAIL(p, (si), (mi));			\
 } while(0)
 
 #define UDP_UNNAT_CHECK(p, u, si, sp, mi, mp, di, dp)	\
 do {							\
 	u = set_udp(p, (sp), (mp));			\
 	UNNAT_CHECK(p, (si), (mi), (di));		\
 	ATF_CHECK(u->uh_sport == htons(sp));		\
 	ATF_CHECK(u->uh_dport == htons(dp));		\
 } while(0)
 
 #define UDP_UNNAT_FAIL(p, u, si, sp, mi, mp)	do {	\
 	u = set_udp(p, (sp), (mp));			\
 	UNNAT_FAIL(p, (si), (mi));			\
 } while(0)
 
 #endif /* _UTIL_H */