cmsg_ipv6.sh

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

source lib.sh

IP6=2001:db8:1::1/64
TGT6=2001:db8:1::2
TMPF=$(mktemp --suffix ".pcap")

cleanup()
{
    rm -f $TMPF
    cleanup_ns $NS
}

trap cleanup EXIT

tcpdump -h | grep immediate-mode >> /dev/null
if [ $? -ne 0 ]; then
    echo "SKIP - tcpdump with --immediate-mode option required"
    exit $ksft_skip
fi

# Namespaces
setup_ns NS
NSEXE="ip netns exec $NS"

$NSEXE sysctl -w net.ipv4.ping_group_range='0 2147483647' > /dev/null

# Connectivity
ip -netns $NS link add type dummy
ip -netns $NS link set dev dummy0 up
ip -netns $NS addr add $IP6 dev dummy0

# Test
BAD=0
TOTAL=0

check_result() {
    ((TOTAL++))
    if [ $1 -ne $2 ]; then
	echo "  Case $3 returned $1, expected $2"
	((BAD++))
    fi
}

# IPV6_DONTFRAG
for ovr in setsock cmsg both diff; do
    for df in 0 1; do
	for p in u i r; do
	    [ $p == "u" ] && prot=UDP
	    [ $p == "i" ] && prot=ICMP
	    [ $p == "r" ] && prot=RAW

[ $ovr == "setsock" ] && m="-F $df"
	    [ $ovr == "cmsg" ]    && m="-f $df"
	    [ $ovr == "both" ]    && m="-F $df -f $df"
	    [ $ovr == "diff" ]    && m="-F $((1 - df)) -f $df"

$NSEXE ./cmsg_sender -s -S 2000 -6 -p $p $m $TGT6 1234
	    check_result $? $df "DONTFRAG $prot $ovr"
	done
    done
done

# IPV6_TCLASS
TOS=0x10
TOS2=0x20

ip -6 -netns $NS rule add tos $TOS lookup 300
ip -6 -netns $NS route add table 300 prohibit any

for ovr in setsock cmsg both diff; do
    for p in u i r; do
	[ $p == "u" ] && prot=UDP
	[ $p == "i" ] && prot=ICMP
	[ $p == "r" ] && prot=RAW

[ $ovr == "setsock" ] && m="-C"
	[ $ovr == "cmsg" ]    && m="-c"
	[ $ovr == "both" ]    && m="-C $((TOS2)) -c"
	[ $ovr == "diff" ]    && m="-C $((TOS )) -c"

$NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
	BG=$!
	sleep 0.05

$NSEXE ./cmsg_sender -6 -p $p $m $((TOS2)) $TGT6 1234
	check_result $? 0 "TCLASS $prot $ovr - pass"

while [ -d /proc/$BG ]; do
	    $NSEXE ./cmsg_sender -6 -p $p $m $((TOS2)) $TGT6 1234
	done

tcpdump -r $TMPF -v 2>&1 | grep "class $TOS2" >> /dev/null
	check_result $? 0 "TCLASS $prot $ovr - packet data"
	rm $TMPF

[ $ovr == "both" ]    && m="-C $((TOS )) -c"
	[ $ovr == "diff" ]    && m="-C $((TOS2)) -c"

$NSEXE ./cmsg_sender -6 -p $p $m $((TOS)) -s $TGT6 1234
	check_result $? 1 "TCLASS $prot $ovr - rejection"
    done
done

# IPV6_HOPLIMIT
LIM=4

for ovr in setsock cmsg both diff; do
    for p in u i r; do
	[ $p == "u" ] && prot=UDP
	[ $p == "i" ] && prot=ICMP
	[ $p == "r" ] && prot=RAW

[ $ovr == "setsock" ] && m="-L"
	[ $ovr == "cmsg" ]    && m="-l"
	[ $ovr == "both" ]    && m="-L $LIM -l"
	[ $ovr == "diff" ]    && m="-L $((LIM + 1)) -l"

$NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
	BG=$!
	sleep 0.05

$NSEXE ./cmsg_sender -6 -p $p $m $LIM $TGT6 1234
	check_result $? 0 "HOPLIMIT $prot $ovr - pass"

while [ -d /proc/$BG ]; do
	    $NSEXE ./cmsg_sender -6 -p $p $m $LIM $TGT6 1234
	done

tcpdump -r $TMPF -v 2>&1 | grep "hlim $LIM[^0-9]" >> /dev/null
	check_result $? 0 "HOPLIMIT $prot $ovr - packet data"
	rm $TMPF
    done
done

# IPV6 exthdr
for p in u i r; do
    # Very basic "does it crash" test
    for h in h d r; do
	$NSEXE ./cmsg_sender -p $p -6 -H $h $TGT6 1234
	check_result $? 0 "ExtHdr $prot $ovr - pass"
    done
done

# Summary
if [ $BAD -ne 0 ]; then
    echo "FAIL - $BAD/$TOTAL cases failed"
    exit 1
else
    echo "OK"
    exit 0
fi

docroot: /var/www/469ed2f6-4d4b-4a8a-9f5e-ee4ef04d3bc8/public_html

curdir: /usr/src/linux-headers-6.8.0-100/tools/testing/selftests/net

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X	Makefile	6016
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X	altnames.sh	1806
X	amt.sh	9414
X	arp_ndisc_evict_nocarrier.sh	5273
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	forwarding	12288
X	fq_band_pktlimit.sh	1833
X	gre_gso.sh	4140
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	hsr	4096
X	icmp.sh	2579
X	icmp_redirect.sh	12793
X	in_netns.sh	323
X	io_uring_zerocopy_tx.sh	3071
X	ioam6.sh	29126
X	ip6_gre_headroom.sh	1400
X	ip_defrag.sh	2087
X	ip_local_port_range.sh	153
X	ipv6_flowlabel.sh	1027
X	ipv6_route_update_soft_lockup.sh	11060
X	l2_tos_ttl_inherit.sh	14285
X	l2tp.sh	9910
X	lib.sh	5567
	mptcp	4096
X	msg_zerocopy.sh	2996
X	ndisc_unsolicited_na_test.sh	5986
X	net_helper.sh	514
X	netdevice.sh	4521
X	netns-name.sh	2458
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X	pmtu.sh	75760
X	psock_snd.sh	2252
X	reuseaddr_ports_exhausted.sh	635
X	reuseport_addr_any.sh	81
X	route_localnet.sh	1970
X	rps_default_mask.sh	2246
X	rtnetlink.sh	34345
X	rxtimestamp.sh	79
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X	srv6_end_dt4_l3vpn_test.sh	17327
X	srv6_end_dt6_l3vpn_test.sh	17524
X	srv6_end_flavors_test.sh	24123
X	srv6_end_next_csid_l3vpn_test.sh	33312
X	srv6_end_x_next_csid_l3vpn_test.sh	36316
X	srv6_hencap_red_l3vpn_test.sh	23706
X	srv6_hl2encap_red_l2vpn_test.sh	21000
X	stress_reuseport_listen.sh	539
	tcp_ao	4096
X	tcp_fastopen_backup_key.sh	1086
X	test_blackhole_dev.sh	280
X	test_bpf.sh	225
X	test_bridge_backup_port.sh	28003
X	test_bridge_neigh_suppress.sh	29079
X	test_ingress_egress_chaining.sh	2193
X	test_vxlan_fdb_changelink.sh	678
X	test_vxlan_mdb.sh	94756
X	test_vxlan_nolocalbypass.sh	5705
X	test_vxlan_under_vrf.sh	5676
X	test_vxlan_vnifiltering.sh	21413
X	toeplitz.sh	4991
X	toeplitz_client.sh	667
X	traceroute.sh	7072
X	txtimestamp.sh	1702
X	udpgro.sh	5854
X	udpgro_bench.sh	2123
X	udpgro_frglist.sh	2477
X	udpgro_fwd.sh	7247
X	udpgso.sh	545
X	udpgso_bench.sh	2852
X	unicast_extensions.sh	8172
X	veth.sh	11050
X	vlan_hw_filter.sh	819
X	vrf-xfrm-tests.sh	10908
X	vrf_route_leaking.sh	14894
X	vrf_strict_mode_test.sh	8191
X	xfrm_policy.sh	15007