diff --git a/Makefile b/Makefile
index 2e91c328..67176bef 100644
--- a/Makefile
+++ b/Makefile
@@ -32,6 +32,8 @@ ADDLIB+=mpls_ntop.o mpls_pton.o
 CC = gcc
 HOSTCC = gcc
 DEFINES += -D_GNU_SOURCE
+# Turn on transparent support for LFS
+DEFINES += -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
 CCOPTS = -O2
 WFLAGS := -Wall -Wstrict-prototypes  -Wmissing-prototypes
 WFLAGS += -Wmissing-declarations -Wold-style-definition -Wformat=2
diff --git a/configure b/configure
index f1325df8..1605464c 100755
--- a/configure
+++ b/configure
@@ -284,6 +284,17 @@ check_selinux()
 	fi
 }
 
+check_mnl()
+{
+	if ${PKG_CONFIG} libmnl --exists
+	then
+		echo "HAVE_MNL:=y" >>Config
+		echo -n "yes"
+	else
+		echo -n "no"
+	fi
+}
+
 echo "# Generated config based on" $INCLUDE >Config
 check_toolchain
 
@@ -313,5 +324,10 @@ check_selinux
 echo -n "ELF support: "
 check_elf
 
+echo -n "libmnl support: "
+check_mnl
+echo " (required by tipc)"
+
 echo -e "\nDocs"
 check_docs
+echo ""
diff --git a/misc/ss.c b/misc/ss.c
index dba09017..0db0a529 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -755,7 +755,7 @@ struct tcpstat
 	int		    timer;
 	int		    timeout;
 	int		    probes;
-	char		    *cong_alg;
+	char		    cong_alg[16];
 	double		    rto, ato, rtt, rttvar;
 	int		    qack, cwnd, ssthresh, backoff;
 	double		    send_bps;
@@ -860,8 +860,7 @@ static const char *print_ms_timer(int timeout)
 	return buf;
 }
 
-struct scache
-{
+struct scache {
 	struct scache *next;
 	int port;
 	char *name;
@@ -951,11 +950,15 @@ static const char *__resolve_service(int port)
 	return NULL;
 }
 
+#define SCACHE_BUCKETS 1024
+static struct scache *cache_htab[SCACHE_BUCKETS];
 
 static const char *resolve_service(int port)
 {
 	static char buf[128];
-	static struct scache cache[256];
+	struct scache *c;
+	const char *res;
+	int hash;
 
 	if (port == 0) {
 		buf[0] = '*';
@@ -963,45 +966,35 @@ static const char *resolve_service(int port)
 		return buf;
 	}
 
-	if (resolve_services) {
-		if (dg_proto == RAW_PROTO) {
-			return inet_proto_n2a(port, buf, sizeof(buf));
-		} else {
-			struct scache *c;
-			const char *res;
-			int hash = (port^(((unsigned long)dg_proto)>>2))&255;
+	if (!resolve_services)
+		goto do_numeric;
 
-			for (c = &cache[hash]; c; c = c->next) {
-				if (c->port == port &&
-				    c->proto == dg_proto) {
-					if (c->name)
-						return c->name;
-					goto do_numeric;
-				}
-			}
+	if (dg_proto == RAW_PROTO)
+		return inet_proto_n2a(port, buf, sizeof(buf));
 
-			if ((res = __resolve_service(port)) != NULL) {
-				if ((c = malloc(sizeof(*c))) == NULL)
-					goto do_numeric;
-			} else {
-				c = &cache[hash];
-				if (c->name)
-					free(c->name);
-			}
-			c->port = port;
-			c->name = NULL;
-			c->proto = dg_proto;
-			if (res) {
-				c->name = strdup(res);
-				c->next = cache[hash].next;
-				cache[hash].next = c;
-			}
-			if (c->name)
-				return c->name;
-		}
+
+	hash = (port^(((unsigned long)dg_proto)>>2)) % SCACHE_BUCKETS;
+
+	for (c = cache_htab[hash]; c; c = c->next) {
+		if (c->port == port && c->proto == dg_proto)
+			goto do_cache;
 	}
 
-	do_numeric:
+	c = malloc(sizeof(*c));
+	if (!c)
+		goto do_numeric;
+	res = __resolve_service(port);
+	c->port = port;
+	c->name = res ? strdup(res) : NULL;
+	c->proto = dg_proto;
+	c->next = cache_htab[hash];
+	cache_htab[hash] = c;
+
+do_cache:
+	if (c->name)
+		return c->name;
+
+do_numeric:
 	sprintf(buf, "%u", port);
 	return buf;
 }
@@ -1666,7 +1659,7 @@ static void tcp_stats_print(struct tcpstat *s)
 		printf(" ecnseen");
 	if (s->has_fastopen_opt)
 		printf(" fastopen");
-	if (s->cong_alg)
+	if (s->cong_alg[0])
 		printf(" %s", s->cong_alg);
 	if (s->has_wscale_opt)
 		printf(" wscale:%d,%d", s->snd_wscale, s->rcv_wscale);
@@ -1913,11 +1906,10 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
 			s.has_fastopen_opt = TCPI_HAS_OPT(info, TCPI_OPT_SYN_DATA);
 		}
 
-		if (tb[INET_DIAG_CONG]) {
-			const char *cong_attr = rta_getattr_str(tb[INET_DIAG_CONG]);
-			s.cong_alg = malloc(strlen(cong_attr + 1));
-			strcpy(s.cong_alg, cong_attr);
-		}
+		if (tb[INET_DIAG_CONG])
+			strncpy(s.cong_alg,
+				rta_getattr_str(tb[INET_DIAG_CONG]),
+				sizeof(s.cong_alg) - 1);
 
 		if (TCPI_HAS_OPT(info, TCPI_OPT_WSCALE)) {
 			s.has_wscale_opt  = true;
@@ -1993,8 +1985,6 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
 		tcp_stats_print(&s);
 		if (s.dctcp)
 			free(s.dctcp);
-		if (s.cong_alg)
-			free(s.cong_alg);
 	}
 }
 
@@ -2218,6 +2208,8 @@ static int inet_show_netlink(struct filter *f, FILE *dump_fp, int protocol)
 		return -1;
 	rth.dump = MAGIC_SEQ;
 	rth.dump_fp = dump_fp;
+	if (preferred_family == PF_INET6)
+		family = PF_INET6;
 
 again:
 	if ((err = sockdiag_send(family, rth.fd, protocol, f)))
@@ -2230,7 +2222,7 @@ again:
 		}
 		goto Exit;
 	}
-	if (family == PF_INET) {
+	if (family == PF_INET && preferred_family != PF_INET) {
 		family = PF_INET6;
 		goto again;
 	}
diff --git a/tc/tc_util.c b/tc/tc_util.c
index dc2b70fa..aa6de244 100644
--- a/tc/tc_util.c
+++ b/tc/tc_util.c
@@ -250,18 +250,19 @@ void print_rate(char *buf, int len, __u64 rate)
 	extern int use_iec;
 	unsigned long kilo = use_iec ? 1024 : 1000;
 	const char *str = use_iec ? "i" : "";
-	int i = 0;
 	static char *units[5] = {"", "K", "M", "G", "T"};
+	int i;
 
 	rate <<= 3; /* bytes/sec -> bits/sec */
 
-	for (i = 0; i < ARRAY_SIZE(units); i++)  {
+	for (i = 0; i < ARRAY_SIZE(units) - 1; i++)  {
 		if (rate < kilo)
 			break;
 		if (((rate % kilo) != 0) && rate < 1000*kilo)
 			break;
 		rate /= kilo;
 	}
+
 	snprintf(buf, len, "%.0f%s%sbit", (double)rate, units[i], str);
 }
 
diff --git a/testsuite/Makefile b/testsuite/Makefile
index 4b945b0c..20276500 100644
--- a/testsuite/Makefile
+++ b/testsuite/Makefile
@@ -52,6 +52,9 @@ endif
 	@for i in $(IPVERS); do \
 		o=`echo $$i | sed -e 's/iproute2\///'`; \
 		echo -n "Running $@ [$$o/`uname -r`]: "; \
+		TMP_ERR=`mktemp /tmp/tc_testsuite.XXXXXX`; \
+		TMP_OUT=`mktemp /tmp/tc_testsuite.XXXXXX`; \
+		STD_ERR="$$TMP_ERR" STD_OUT="$$TMP_OUT" \
 		TC="$$i/tc/tc" IP="$$i/ip/ip" DEV="$(DEV)" IPVER="$@" SNAME="$$i" \
 		ERRF="$(RESULTS_DIR)/$@.$$o.err" $(KENV) $(PREFIX) tests/$@ > $(RESULTS_DIR)/$@.$$o.out; \
 		if [ "$$?" = "127" ]; then \
@@ -61,5 +64,6 @@ endif
 		else \
 			echo "PASS"; \
 		fi; \
+		rm "$$TMP_ERR" "$$TMP_OUT"; \
 		dmesg > $(RESULTS_DIR)/$@.$$o.dmesg; \
 	done
diff --git a/testsuite/lib/generic.sh b/testsuite/lib/generic.sh
index 3473cc13..b7de7044 100644
--- a/testsuite/lib/generic.sh
+++ b/testsuite/lib/generic.sh
@@ -30,57 +30,49 @@ ts_tc()
 {
 	SCRIPT=$1; shift
 	DESC=$1; shift
-	TMP_ERR=`mktemp /tmp/tc_testsuite.XXXXXX` || exit
-	TMP_OUT=`mktemp /tmp/tc_testsuite.XXXXXX` || exit
 
-	$TC $@ 2> $TMP_ERR > $TMP_OUT
+	$TC $@ 2> $STD_ERR > $STD_OUT
 
-	if [ -s $TMP_ERR ]; then
+	if [ -s $STD_ERR ]; then
 		ts_err "${SCRIPT}: ${DESC} failed:"
 		ts_err "command: $TC $@"
 		ts_err "stderr output:"
-		ts_err_cat $TMP_ERR
-		if [ -s $TMP_OUT ]; then
+		ts_err_cat $STD_ERR
+		if [ -s $STD_OUT ]; then
 			ts_err "stdout output:"
-			ts_err_cat $TMP_OUT
+			ts_err_cat $STD_OUT
 		fi
-	elif [ -s $TMP_OUT ]; then
+	elif [ -s $STD_OUT ]; then
 		echo "${SCRIPT}: ${DESC} succeeded with output:"
-		cat $TMP_OUT
+		cat $STD_OUT
 	else
 		echo "${SCRIPT}: ${DESC} succeeded"
 	fi
-
-	rm $TMP_ERR $TMP_OUT
 }
 
 ts_ip()
 {
 	SCRIPT=$1; shift
 	DESC=$1; shift
-	TMP_ERR=`mktemp /tmp/tc_testsuite.XXXXXX` || exit
-	TMP_OUT=`mktemp /tmp/tc_testsuite.XXXXXX` || exit
 
-	$IP $@ 2> $TMP_ERR > $TMP_OUT
+	$IP $@ 2> $STD_ERR > $STD_OUT
         RET=$?
 
-	if [ -s $TMP_ERR ] || [ "$RET" != "0" ]; then
+	if [ -s $STD_ERR ] || [ "$RET" != "0" ]; then
 		ts_err "${SCRIPT}: ${DESC} failed:"
 		ts_err "command: $IP $@"
 		ts_err "stderr output:"
-		ts_err_cat $TMP_ERR
-		if [ -s $TMP_OUT ]; then
+		ts_err_cat $STD_ERR
+		if [ -s $STD_OUT ]; then
 			ts_err "stdout output:"
-			ts_err_cat $TMP_OUT
+			ts_err_cat $STD_OUT
 		fi
-	elif [ -s $TMP_OUT ]; then
+	elif [ -s $STD_OUT ]; then
 		echo "${SCRIPT}: ${DESC} succeeded with output:"
-		cat $TMP_OUT
+		cat $STD_OUT
 	else
 		echo "${SCRIPT}: ${DESC} succeeded"
 	fi
-
-	rm $TMP_ERR $TMP_OUT
 }
 
 ts_qdisc_available()
@@ -97,3 +89,47 @@ rand_dev()
 {
     echo "dev-$(tr -dc "[:alpha:]" < /dev/urandom | head -c 6)"
 }
+
+pr_failed()
+{
+	echo " [FAILED]"
+	ts_err "matching failed"
+}
+
+pr_success()
+{
+	echo " [SUCCESS]"
+}
+
+test_on()
+{
+	echo -n "test on: \"$1\""
+	if cat "$STD_OUT" | grep -qE "$1"
+	then
+		pr_success
+	else
+		pr_failed
+	fi
+}
+
+test_on_not()
+{
+	echo -n "test on: \"$1\""
+	if cat "$STD_OUT" | grep -vqE "$1"
+	then
+		pr_success
+	else
+		pr_failed
+	fi
+}
+
+test_lines_count()
+{
+	echo -n "test on lines count ($1): "
+	if cat "$STD_OUT" | wc -l | grep -q "$1"
+	then
+		pr_success
+	else
+		pr_failed
+	fi
+}
diff --git a/testsuite/tests/ip/link/new_link.t b/testsuite/tests/ip/link/new_link.t
index 549ff256..699adbcd 100755
--- a/testsuite/tests/ip/link/new_link.t
+++ b/testsuite/tests/ip/link/new_link.t
@@ -7,5 +7,9 @@ ts_log "[Testing add/del virtual links]"
 NEW_DEV="$(rand_dev)"
 
 ts_ip "$0" "Add $NEW_DEV dummy interface"  link add dev $NEW_DEV type dummy
+
 ts_ip "$0" "Show $NEW_DEV dummy interface" link show dev $NEW_DEV
+test_on "$NEW_DEV"
+test_lines_count 2
+
 ts_ip "$0" "Del $NEW_DEV dummy interface"  link del dev $NEW_DEV
diff --git a/testsuite/tests/ip/route/add_default_route.t b/testsuite/tests/ip/route/add_default_route.t
index 29085288..e5ea6473 100755
--- a/testsuite/tests/ip/route/add_default_route.t
+++ b/testsuite/tests/ip/route/add_default_route.t
@@ -8,5 +8,26 @@ DEV=dummy0
 
 ts_ip "$0" "Add new interface $DEV" link add $DEV type dummy
 ts_ip "$0" "Set $DEV into UP state" link set up dev $DEV
+
 ts_ip "$0" "Add 1.1.1.1/24 addr on $DEV" addr add 1.1.1.1/24 dev $DEV
-ts_ip "$0" "Add default route via 1.1.1.1" route add default via 1.1.1.1
+ts_ip "$0" "Add default route via 1.1.1.2" route add default via 1.1.1.2
+
+ts_ip "$0" "Show IPv4 default route" -4 route show default
+test_on "default via 1.1.1.2 dev $DEV"
+test_lines_count 1
+
+ts_ip "$0" "Add another IPv4 route dst 2.2.2.0/24" -4 route add 2.2.2.0/24 dev $DEV
+ts_ip "$0" "Show IPv4 default route" -4 route show default
+test_on "default via 1.1.1.2 dev $DEV"
+test_lines_count 1
+
+ts_ip "$0" "Add dead:beef::1/64 addr on $DEV" -6 addr add dead:beef::1/64 dev $DEV
+ts_ip "$0" "Add default route via dead:beef::2" route add default via dead:beef::2
+ts_ip "$0" "Show IPv6 default route" -6 route show default
+test_on "default via dead:beef::2 dev $DEV"
+test_lines_count 1
+
+ts_ip "$0" "Add another IPv6 route dst cafe:babe::/64" -6 route add cafe:babe::/64 dev $DEV
+ts_ip "$0" "Show IPv6 default route" -6 route show default
+test_on "default via dead:beef::2 dev $DEV"
+test_lines_count 1