diff --git a/testcases/network/lib6/in6_02.c b/testcases/network/lib6/in6_02.c
index e1a71d987..e3a92f519 100644
--- a/testcases/network/lib6/in6_02.c
+++ b/testcases/network/lib6/in6_02.c
@@ -1,115 +1,95 @@
 /*
+ * Copyright (c) International Business Machines  Corp., 2001
+ * Copyright (c) 2018 Petr Vorel <pvorel@suse.cz>
  *
- *   Copyright (c) International Business Machines  Corp., 2001
- *   Author: David L Stevens
+ * Author: David L Stevens
  *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
  *
- *   This program 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 General Public License for more details.
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software Foundation,
- *   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-/*
- *   Description:
- *     Tests for name to index and index to name functions in IPv6
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Description:
+ * IPv6 name to index and index to name function tests
  */
 
+
+#include <stdlib.h>
+#include <stdio.h>
 #include <unistd.h>
 #include <errno.h>
 #include <sys/socket.h>
 #include <net/if.h>
 
-#include "test.h"
+#include "tst_test.h"
+
+#define I2N_RNDCOUNT	10	/* random ints */
+#define I2N_LOWCOUNT	10	/* sequential from 0 */
 
 static struct {
 	char *name;
 	int nonzero;
-} n2i[] = {
+} test_case[] = {
 	{ "lo", 1 },
 	{ NULL, 1 },
 	{ "hoser75", 0 },
 	{ "6", 0 },
 };
 
-#define N2I_COUNT (sizeof(n2i)/sizeof(n2i[0]))
-#define I2N_RNDCOUNT	10	/* random ints */
-#define I2N_LOWCOUNT	10	/* sequential from 0 */
-
 static void setup(void);
-static void n2itest(void);
-static void i2ntest(void);
-static void initest(void);
-
-static void (*testfunc[])(void) = { n2itest,
-	i2ntest, initest };
+static void if_nametoindex_test(void);
+static void if_indextoname_test(void);
+static void if_nameindex_test(void);
 
-char *TCID = "in6_02";
-int TST_TOTAL = ARRAY_SIZE(testfunc);
+static void (*testfunc[])(void) = { if_nametoindex_test, if_indextoname_test,
+	if_nameindex_test };
 
-int main(int argc, char *argv[])
-{
-	int lc;
-	int i;
-
-	tst_parse_opts(argc, argv, NULL, NULL);
-
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); ++lc) {
-		tst_count = 0;
-
-		for (i = 0; i < TST_TOTAL; i++)
-			(*testfunc[i])();
-	}
-
-	tst_exit();
-}
-
-/* if_nametoindex tests */
-void n2itest(void)
+static void if_nametoindex_test(void)
 {
 	unsigned int i;
 	char ifname[IF_NAMESIZE], *pifn;
 
-	for (i = 0; i < N2I_COUNT; ++i) {
-		if (n2i[i].name == NULL) {
-			tst_resm(TCONF, "LHOST_IFACES not defined or invalid, skip testing it");
+	tst_res(TINFO, "IPv6 if_nametoindex() test");
+
+	for (i = 0; i < ARRAY_SIZE(test_case); ++i) {
+		if (test_case[i].name == NULL) {
+			tst_res(TCONF, "LHOST_IFACES not defined or invalid, skip testing it");
 			return;
 		}
 
-		TEST(if_nametoindex(n2i[i].name));
-		if (!TEST_RETURN != !n2i[i].nonzero) {
-			tst_resm(TFAIL, "if_nametoindex(\"%s\") %ld "
-				"[should be %szero]", n2i[i].name, TEST_RETURN,
-				n2i[i].nonzero ? "non" : "");
+		TEST(if_nametoindex(test_case[i].name));
+		if (!TEST_RETURN != !test_case[i].nonzero) {
+			tst_res(TFAIL, "if_nametoindex(%s) %ld [should be %szero]",
+					test_case[i].name, TEST_RETURN, test_case[i].nonzero ? "non"
+					: "");
 			return;
 		}
 		if (TEST_RETURN) {
 			pifn = if_indextoname(TEST_RETURN, ifname);
-			if (!pifn || strcmp(n2i[i].name, pifn)) {
-				tst_resm(TFAIL, "if_nametoindex(\"%s\") %ld "
-					"doesn't match if_indextoname(%ld) "
-					"\"%s\"", n2i[i].name, TEST_RETURN,
-					TEST_RETURN, pifn ? pifn : "");
+			if (!pifn || strcmp(test_case[i].name, pifn)) {
+				tst_res(TFAIL,
+					"if_nametoindex(%s) %ld doesn't match if_indextoname(%ld) \"%s\"",
+					test_case[i].name, TEST_RETURN, TEST_RETURN, pifn ? pifn
+						: "");
 				return;
 			}
 		}
-		tst_resm(TINFO, "if_nametoindex(\"%s\") %ld",
-			n2i[i].name, TEST_RETURN);
+		tst_res(TINFO, "if_nametoindex(%s) %ld",
+			test_case[i].name, TEST_RETURN);
 	}
 
-	tst_resm(TPASS, "if_nametoindex() tests succeed");
+	tst_res(TPASS, "if_nametoindex() test succeed");
 }
 
-int sub_i2ntest(unsigned int if_index)
+static int sub_if_indextoname_test(unsigned int if_index)
 {
 	char ifname[IF_NAMESIZE];
 	unsigned int idx;
@@ -117,48 +97,49 @@ int sub_i2ntest(unsigned int if_index)
 	TEST((ifname == if_indextoname(if_index, ifname)));
 	if (!TEST_RETURN) {
 		if (TEST_ERRNO != ENXIO) {
-			tst_resm(TFAIL, "if_indextoname(%d) returns %ld "
-				 "but errno %d != ENXIO", if_index, TEST_RETURN,
-				 TEST_ERRNO);
+			tst_res(TFAIL,
+				"if_indextoname(%d) returns %ld but errno %d != ENXIO",
+				if_index, TEST_RETURN, TEST_ERRNO);
 			return 0;
 		}
-		tst_resm(TINFO, "if_indextoname(%d) returns NULL", if_index);
+		tst_res(TINFO, "if_indextoname(%d) returns NULL", if_index);
 		return 1;
 	}
 	/* else, a valid interface-- double check name */
 	idx = if_nametoindex(ifname);
 	if (idx != if_index) {
-		tst_resm(TFAIL, "if_indextoname(%u) returns \"%s\" but "
-			 "doesn't if_nametoindex(\"%s\") returns %u",
-			 if_index, ifname, ifname, idx);
+		tst_res(TFAIL,
+			"if_indextoname(%u) returns \"%s\" but doesn't if_nametoindex(%s) returns %u",
+			if_index, ifname, ifname, idx);
 		return 0;
 	}
-	tst_resm(TINFO, "if_indextoname(%d) returns \"%s\"", if_index, ifname);
+	tst_res(TINFO, "if_indextoname(%d) returns \"%s\"", if_index, ifname);
 	return 1;
 }
 
-/* if_indextoname tests */
-void i2ntest(void)
+static void if_indextoname_test(void)
 {
 	unsigned int i;
 
+	tst_res(TINFO, "IPv6 if_indextoname() test");
+
 	/* some low-numbered indexes-- likely to get valid interfaces here */
 	for (i = 0; i < I2N_LOWCOUNT; ++i)
-		if (!sub_i2ntest(i))
+		if (!sub_if_indextoname_test(i))
 			return;	/* skip the rest, if broken */
 	/* some random ints; should mostly fail */
 	for (i = 0; i < I2N_RNDCOUNT; ++i)
-		if (!sub_i2ntest(rand()))
+		if (!sub_if_indextoname_test(rand()))
 			return;	/* skip the rest, if broken */
 
-	tst_resm(TPASS, "if_indextoname() tests succeed");
+	tst_res(TPASS, "if_indextoname() test succeed");
 }
 
 /*
  * This is an ugly, linux-only solution. getrusage() doesn't support the
  * current data segment size, so we get it out of /proc
  */
-int getdatasize(void)
+static int getdatasize(void)
 {
 	char line[128], *p;
 	int dsize = -1;
@@ -181,8 +162,7 @@ int getdatasize(void)
 	return dsize;
 }
 
-/* if_nameindex tests */
-void initest(void)
+static void if_nameindex_test(void)
 {
 	struct if_nameindex *pini;
 	int i;
@@ -191,79 +171,84 @@ void initest(void)
 	int freenicount;
 	int dsize_before, dsize_after;
 
+	tst_res(TINFO, "IPv6 if_nameindex() test");
+
 	pini = if_nameindex();
 	if (pini == NULL) {
-		tst_resm(TFAIL, "if_nameindex() returns NULL, errno %d (%s)",
-			 TEST_ERRNO, strerror(TEST_ERRNO));
+		tst_res(TFAIL, "if_nameindex() returns NULL, errno %d (%s)",
+			TEST_ERRNO, strerror(TEST_ERRNO));
 		return;
 	}
 	for (i = 0; pini[i].if_index; ++i) {
 		p = if_indextoname(pini[i].if_index, buf);
 		if (!p || strcmp(p, pini[i].if_name)) {
-			tst_resm(TFAIL, "if_nameindex idx %d name \"%s\" but "
-				 "if_indextoname(%d) is \"%s\"",
-				 pini[i].if_index, pini[i].if_name,
-				 pini[i].if_index, p ? p : "");
+			tst_res(TFAIL,
+				"if_nameindex idx %d name \"%s\" but if_indextoname(%d) is \"%s\"",
+				pini[i].if_index, pini[i].if_name,
+				pini[i].if_index, p ? p : "");
 			return;
 		}
 		idx = if_nametoindex(pini[i].if_name);
 		if (idx != pini[i].if_index) {
-			tst_resm(TFAIL, "if_nameindex idx %d name \"%s\" but "
-				 "if_indextoname(\"%s\") is %d",
-				 pini[i].if_index, pini[i].if_name,
-				 pini[i].if_name, idx);
+			tst_res(TFAIL,
+				"if_nameindex idx %d name \"%s\" but if_indextoname(%s) is %d",
+				pini[i].if_index, pini[i].if_name,
+				pini[i].if_name, idx);
 			return;
 		}
-		tst_resm(TINFO, "if_nameindex idx %d name \"%s\"",
+		tst_res(TINFO, "if_nameindex idx %d name \"%s\"",
 			 pini[i].if_index, pini[i].if_name);
 	}
 	if_freenameindex(pini);
 
-	/* if_freenameindex() has no error conditions; see if we run
+	/*
+	 * if_freenameindex() has no error conditions; see if we run
 	 * out of memory if we do it a lot.
 	 */
 	dsize_before = getdatasize();
 	if (dsize_before < 0) {
-		tst_brkm(TBROK, NULL, "getdatasize failed: errno %d (%s)",
+		tst_brk(TBROK, "getdatasize failed: errno %d (%s)",
 			errno, strerror(errno));
 	}
-	/* we need to leak at least a page to detect a leak; 1 byte per call
+
+	/*
+	 * we need to leak at least a page to detect a leak; 1 byte per call
 	 * will be detected with getpagesize() calls.
 	 */
 	freenicount = getpagesize();
 	for (i = 0; i < freenicount; ++i) {
 		pini = if_nameindex();
 		if (pini == NULL) {
-			tst_resm(TINFO, "if_freenameindex test failed "
-				 "if_nameindex() iteration %d", i);
+			tst_res(TINFO,
+				"if_freenameindex test failed if_nameindex() iteration %d", i);
 			break;
 		}
 		if_freenameindex(pini);
 	}
 	dsize_after = getdatasize();
 	if (dsize_after < 0) {
-		tst_brkm(TBROK, NULL, "getdatasize failed: errno %d (%s)",
+		tst_brk(TBROK, "getdatasize failed: errno %d (%s)",
 			errno, strerror(errno));
 	}
 	if (dsize_after > dsize_before + getpagesize()) {
-		tst_resm(TFAIL, "if_freenameindex leaking memory "
-			 "(%d iterations) dsize before %d dsize after %d", i,
-			 dsize_before, dsize_after);
+		tst_res(TFAIL,
+			"if_freenameindex leaking memory (%d iterations) dsize before %d dsize after %d",
+			i, dsize_before, dsize_after);
 		return;
-	} else {
-		tst_resm(TINFO, "if_freenameindex passed %d iterations", i);
 	}
+	tst_res(TINFO, "if_freenameindex passed %d iterations", i);
 
-	tst_resm(TPASS, "if_nameindex() tests succeed");
+	tst_res(TPASS, "if_nameindex() test succeed");
 }
 
-void setup(void)
+static void setup(void)
 {
-	TEST_PAUSE;
-
 	char *ifnames = getenv("LHOST_IFACES");
-	if (!ifnames)
+
+	if (!ifnames) {
+		tst_res(TINFO, "LHOST_IFACES not defined, it will not be tested");
 		return;
+	}
 
 	static char name[256];
 	int ret;
@@ -272,6 +257,17 @@ void setup(void)
 	if (ret == -1)
 		return;
 
-	tst_resm(TINFO, "get interface name from LHOST_IFACES: '%s'", name);
-	n2i[1].name = name;
+	tst_res(TINFO, "LHOST_IFACES \"%s\"", name);
+	test_case[1].name = name;
+}
+
+static void do_test(unsigned int i)
+{
+	testfunc[i]();
 }
+
+static struct tst_test test = {
+	.tcnt = ARRAY_SIZE(testfunc),
+	.setup = setup,
+	.test = do_test,
+};
