3 # This test is for basic NAT functionality: snat, dnat, redirect, masquerade.
6 # Kselftest framework requirement - SKIP code is 4.
11 sfx=$(mktemp -u "XXXXXXXX")
18 for i in 0 1 2; do ip netns del ns$i-"$sfx";done
21 nft --version > /dev/null 2>&1
23 echo "SKIP: Could not run test without nft tool"
27 ip -Version > /dev/null 2>&1
29 echo "SKIP: Could not run test without ip tool"
35 echo "SKIP: Could not create net namespace $ns0"
43 echo "SKIP: Could not create net namespace $ns1"
49 echo "SKIP: Could not create net namespace $ns2"
53 ip link add veth0 netns "$ns0" type veth peer name eth0 netns "$ns1" > /dev/null 2>&1
55 echo "SKIP: No virtual ethernet pair device support in kernel"
58 ip link add veth1 netns "$ns0" type veth peer name eth0 netns "$ns2"
60 ip -net "$ns0" link set lo up
61 ip -net "$ns0" link set veth0 up
62 ip -net "$ns0" addr add 10.0.1.1/24 dev veth0
63 ip -net "$ns0" addr add dead:1::1/64 dev veth0
65 ip -net "$ns0" link set veth1 up
66 ip -net "$ns0" addr add 10.0.2.1/24 dev veth1
67 ip -net "$ns0" addr add dead:2::1/64 dev veth1
70 ip -net ns$i-$sfx link set lo up
71 ip -net ns$i-$sfx link set eth0 up
72 ip -net ns$i-$sfx addr add 10.0.$i.99/24 dev eth0
73 ip -net ns$i-$sfx route add default via 10.0.$i.1
74 ip -net ns$i-$sfx addr add dead:$i::99/64 dev eth0
75 ip -net ns$i-$sfx route add default via dead:$i::1
85 echo "ERROR: $counter counter in $ns has unexpected value (expected $expect) at $tag" 1>&2
86 ip netns exec $ns nft list counter inet filter $counter 1>&2
94 cnt=$(ip netns exec $ns nft list counter inet filter ns0in | grep -q "packets 1 bytes 84")
96 bad_counter $ns ns0in "packets 1 bytes 84" "check_counters 1"
99 cnt=$(ip netns exec $ns nft list counter inet filter ns0out | grep -q "packets 1 bytes 84")
100 if [ $? -ne 0 ]; then
101 bad_counter $ns ns0out "packets 1 bytes 84" "check_counters 2"
105 expect="packets 1 bytes 104"
106 cnt=$(ip netns exec $ns nft list counter inet filter ns0in6 | grep -q "$expect")
107 if [ $? -ne 0 ]; then
108 bad_counter $ns ns0in6 "$expect" "check_counters 3"
111 cnt=$(ip netns exec $ns nft list counter inet filter ns0out6 | grep -q "$expect")
112 if [ $? -ne 0 ]; then
113 bad_counter $ns ns0out6 "$expect" "check_counters 4"
125 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns0in | grep -q "packets 0 bytes 0")
126 if [ $? -ne 0 ]; then
127 bad_counter "$ns0" ns0in "packets 0 bytes 0" "check_ns0_counters 1"
131 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns0in6 | grep -q "packets 0 bytes 0")
132 if [ $? -ne 0 ]; then
133 bad_counter "$ns0" ns0in6 "packets 0 bytes 0"
137 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns0out | grep -q "packets 0 bytes 0")
138 if [ $? -ne 0 ]; then
139 bad_counter "$ns0" ns0out "packets 0 bytes 0" "check_ns0_counters 2"
142 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns0out6 | grep -q "packets 0 bytes 0")
143 if [ $? -ne 0 ]; then
144 bad_counter "$ns0" ns0out6 "packets 0 bytes 0" "check_ns0_counters3 "
148 for dir in "in" "out" ; do
149 expect="packets 1 bytes 84"
150 cnt=$(ip netns exec "$ns0" nft list counter inet filter ${ns}${dir} | grep -q "$expect")
151 if [ $? -ne 0 ]; then
152 bad_counter "$ns0" $ns$dir "$expect" "check_ns0_counters 4"
156 expect="packets 1 bytes 104"
157 cnt=$(ip netns exec "$ns0" nft list counter inet filter ${ns}${dir}6 | grep -q "$expect")
158 if [ $? -ne 0 ]; then
159 bad_counter "$ns0" $ns$dir6 "$expect" "check_ns0_counters 5"
170 ip netns exec ns$i-$sfx nft reset counters inet > /dev/null
180 if [ $family = "inet" ];then
184 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
187 type nat hook output priority 0; policy accept;
188 ip6 daddr dead:1::99 dnat $IPF to dead:2::99
192 if [ $? -ne 0 ]; then
193 echo "SKIP: Could not add add $family dnat hook"
197 # ping netns1, expect rewrite to netns2
198 ip netns exec "$ns0" ping -q -c 1 dead:1::99 > /dev/null
199 if [ $? -ne 0 ]; then
201 echo "ERROR: ping6 failed"
205 expect="packets 0 bytes 0"
206 for dir in "in6" "out6" ; do
207 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns1${dir} | grep -q "$expect")
208 if [ $? -ne 0 ]; then
209 bad_counter "$ns0" ns1$dir "$expect" "test_local_dnat6 1"
214 expect="packets 1 bytes 104"
215 for dir in "in6" "out6" ; do
216 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns2${dir} | grep -q "$expect")
217 if [ $? -ne 0 ]; then
218 bad_counter "$ns0" ns2$dir "$expect" "test_local_dnat6 2"
223 # expect 0 count in ns1
224 expect="packets 0 bytes 0"
225 for dir in "in6" "out6" ; do
226 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0${dir} | grep -q "$expect")
227 if [ $? -ne 0 ]; then
228 bad_counter "$ns1" ns0$dir "$expect" "test_local_dnat6 3"
233 # expect 1 packet in ns2
234 expect="packets 1 bytes 104"
235 for dir in "in6" "out6" ; do
236 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns0${dir} | grep -q "$expect")
237 if [ $? -ne 0 ]; then
238 bad_counter "$ns2" ns0$dir "$expect" "test_local_dnat6 4"
243 test $lret -eq 0 && echo "PASS: ipv6 ping to $ns1 was $family NATted to $ns2"
244 ip netns exec "$ns0" nft flush chain ip6 nat output
255 if [ $family = "inet" ];then
259 ip netns exec "$ns0" nft -f /dev/stdin <<EOF 2>/dev/null
262 type nat hook output priority 0; policy accept;
263 ip daddr 10.0.1.99 dnat $IPF to 10.0.2.99
267 if [ $? -ne 0 ]; then
268 if [ $family = "inet" ];then
269 echo "SKIP: inet nat tests"
273 echo "SKIP: Could not add add $family dnat hook"
277 # ping netns1, expect rewrite to netns2
278 ip netns exec "$ns0" ping -q -c 1 10.0.1.99 > /dev/null
279 if [ $? -ne 0 ]; then
281 echo "ERROR: ping failed"
285 expect="packets 0 bytes 0"
286 for dir in "in" "out" ; do
287 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns1${dir} | grep -q "$expect")
288 if [ $? -ne 0 ]; then
289 bad_counter "$ns0" ns1$dir "$expect" "test_local_dnat 1"
294 expect="packets 1 bytes 84"
295 for dir in "in" "out" ; do
296 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns2${dir} | grep -q "$expect")
297 if [ $? -ne 0 ]; then
298 bad_counter "$ns0" ns2$dir "$expect" "test_local_dnat 2"
303 # expect 0 count in ns1
304 expect="packets 0 bytes 0"
305 for dir in "in" "out" ; do
306 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0${dir} | grep -q "$expect")
307 if [ $? -ne 0 ]; then
308 bad_counter "$ns1" ns0$dir "$expect" "test_local_dnat 3"
313 # expect 1 packet in ns2
314 expect="packets 1 bytes 84"
315 for dir in "in" "out" ; do
316 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns0${dir} | grep -q "$expect")
317 if [ $? -ne 0 ]; then
318 bad_counter "$ns2" ns0$dir "$expect" "test_local_dnat 4"
323 test $lret -eq 0 && echo "PASS: ping to $ns1 was $family NATted to $ns2"
325 ip netns exec "$ns0" nft flush chain $family nat output
328 ip netns exec "$ns0" ping -q -c 1 10.0.1.99 > /dev/null
329 if [ $? -ne 0 ]; then
331 echo "ERROR: ping failed"
335 expect="packets 1 bytes 84"
336 for dir in "in" "out" ; do
337 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns1${dir} | grep -q "$expect")
338 if [ $? -ne 0 ]; then
339 bad_counter "$ns1" ns1$dir "$expect" "test_local_dnat 5"
343 expect="packets 0 bytes 0"
344 for dir in "in" "out" ; do
345 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns2${dir} | grep -q "$expect")
346 if [ $? -ne 0 ]; then
347 bad_counter "$ns0" ns2$dir "$expect" "test_local_dnat 6"
352 # expect 1 count in ns1
353 expect="packets 1 bytes 84"
354 for dir in "in" "out" ; do
355 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0${dir} | grep -q "$expect")
356 if [ $? -ne 0 ]; then
357 bad_counter "$ns0" ns0$dir "$expect" "test_local_dnat 7"
362 # expect 0 packet in ns2
363 expect="packets 0 bytes 0"
364 for dir in "in" "out" ; do
365 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns0${dir} | grep -q "$expect")
366 if [ $? -ne 0 ]; then
367 bad_counter "$ns2" ns0$dir "$expect" "test_local_dnat 8"
372 test $lret -eq 0 && echo "PASS: ping to $ns1 OK after $family nat output chain flush"
377 test_local_dnat_portonly()
385 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
388 type nat hook output priority 0; policy accept;
389 meta l4proto tcp dnat to :2000
394 if [ $? -ne 0 ]; then
395 if [ $family = "inet" ];then
396 echo "SKIP: inet port test"
400 echo "SKIP: Could not add $family dnat hook"
404 echo SERVER-$family | ip netns exec "$ns1" timeout 5 socat -u STDIN TCP-LISTEN:2000 &
407 result=$(ip netns exec "$ns0" timeout 1 socat TCP:$daddr:2000 STDOUT)
409 if [ "$result" = "SERVER-inet" ];then
410 echo "PASS: inet port rewrite without l3 address"
412 echo "ERROR: inet port rewrite"
423 ip netns exec "$ns0" sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
425 ip netns exec "$ns2" ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
426 if [ $? -ne 0 ] ; then
427 echo "ERROR: cannot ping $ns1 from $ns2 via ipv6"
432 expect="packets 1 bytes 104"
433 for dir in "in6" "out6" ; do
434 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
435 if [ $? -ne 0 ]; then
436 bad_counter "$ns1" ns2$dir "$expect" "test_masquerade6 1"
440 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns1${dir} | grep -q "$expect")
441 if [ $? -ne 0 ]; then
442 bad_counter "$ns2" ns1$dir "$expect" "test_masquerade6 2"
449 # add masquerading rule
450 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
453 type nat hook postrouting priority 0; policy accept;
454 meta oif veth0 masquerade $natflags
458 if [ $? -ne 0 ]; then
459 echo "SKIP: Could not add add $family masquerade hook"
463 ip netns exec "$ns2" ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
464 if [ $? -ne 0 ] ; then
465 echo "ERROR: cannot ping $ns1 from $ns2 with active $family masquerade $natflags"
469 # ns1 should have seen packets from ns0, due to masquerade
470 expect="packets 1 bytes 104"
471 for dir in "in6" "out6" ; do
472 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0${dir} | grep -q "$expect")
473 if [ $? -ne 0 ]; then
474 bad_counter "$ns1" ns0$dir "$expect" "test_masquerade6 3"
478 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns1${dir} | grep -q "$expect")
479 if [ $? -ne 0 ]; then
480 bad_counter "$ns2" ns1$dir "$expect" "test_masquerade6 4"
485 # ns1 should not have seen packets from ns2, due to masquerade
486 expect="packets 0 bytes 0"
487 for dir in "in6" "out6" ; do
488 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
489 if [ $? -ne 0 ]; then
490 bad_counter "$ns1" ns0$dir "$expect" "test_masquerade6 5"
494 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns1${dir} | grep -q "$expect")
495 if [ $? -ne 0 ]; then
496 bad_counter "$ns0" ns1$dir "$expect" "test_masquerade6 6"
501 ip netns exec "$ns2" ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
502 if [ $? -ne 0 ] ; then
503 echo "ERROR: cannot ping $ns1 from $ns2 with active ipv6 masquerade $natflags (attempt 2)"
507 ip netns exec "$ns0" nft flush chain $family nat postrouting
508 if [ $? -ne 0 ]; then
509 echo "ERROR: Could not flush $family nat postrouting" 1>&2
513 test $lret -eq 0 && echo "PASS: $family IPv6 masquerade $natflags for $ns2"
524 ip netns exec "$ns0" sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
525 ip netns exec "$ns0" sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null
527 ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
528 if [ $? -ne 0 ] ; then
529 echo "ERROR: cannot ping $ns1 from "$ns2" $natflags"
533 expect="packets 1 bytes 84"
534 for dir in "in" "out" ; do
535 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
536 if [ $? -ne 0 ]; then
537 bad_counter "$ns1" ns2$dir "$expect" "test_masquerade 1"
541 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns1${dir} | grep -q "$expect")
542 if [ $? -ne 0 ]; then
543 bad_counter "$ns2" ns1$dir "$expect" "test_masquerade 2"
550 # add masquerading rule
551 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
554 type nat hook postrouting priority 0; policy accept;
555 meta oif veth0 masquerade $natflags
559 if [ $? -ne 0 ]; then
560 echo "SKIP: Could not add add $family masquerade hook"
564 ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
565 if [ $? -ne 0 ] ; then
566 echo "ERROR: cannot ping $ns1 from $ns2 with active $family masquerade $natflags"
570 # ns1 should have seen packets from ns0, due to masquerade
571 expect="packets 1 bytes 84"
572 for dir in "in" "out" ; do
573 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0${dir} | grep -q "$expect")
574 if [ $? -ne 0 ]; then
575 bad_counter "$ns1" ns0$dir "$expect" "test_masquerade 3"
579 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns1${dir} | grep -q "$expect")
580 if [ $? -ne 0 ]; then
581 bad_counter "$ns2" ns1$dir "$expect" "test_masquerade 4"
586 # ns1 should not have seen packets from ns2, due to masquerade
587 expect="packets 0 bytes 0"
588 for dir in "in" "out" ; do
589 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
590 if [ $? -ne 0 ]; then
591 bad_counter "$ns1" ns0$dir "$expect" "test_masquerade 5"
595 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns1${dir} | grep -q "$expect")
596 if [ $? -ne 0 ]; then
597 bad_counter "$ns0" ns1$dir "$expect" "test_masquerade 6"
602 ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
603 if [ $? -ne 0 ] ; then
604 echo "ERROR: cannot ping $ns1 from $ns2 with active ip masquerade $natflags (attempt 2)"
608 ip netns exec "$ns0" nft flush chain $family nat postrouting
609 if [ $? -ne 0 ]; then
610 echo "ERROR: Could not flush $family nat postrouting" 1>&2
614 test $lret -eq 0 && echo "PASS: $family IP masquerade $natflags for $ns2"
624 ip netns exec "$ns0" sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
626 ip netns exec "$ns2" ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
627 if [ $? -ne 0 ] ; then
628 echo "ERROR: cannnot ping $ns1 from $ns2 via ipv6"
632 expect="packets 1 bytes 104"
633 for dir in "in6" "out6" ; do
634 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
635 if [ $? -ne 0 ]; then
636 bad_counter "$ns1" ns2$dir "$expect" "test_redirect6 1"
640 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns1${dir} | grep -q "$expect")
641 if [ $? -ne 0 ]; then
642 bad_counter "$ns2" ns1$dir "$expect" "test_redirect6 2"
650 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
653 type nat hook prerouting priority 0; policy accept;
654 meta iif veth1 meta l4proto icmpv6 ip6 saddr dead:2::99 ip6 daddr dead:1::99 redirect
658 if [ $? -ne 0 ]; then
659 echo "SKIP: Could not add add $family redirect hook"
663 ip netns exec "$ns2" ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
664 if [ $? -ne 0 ] ; then
665 echo "ERROR: cannot ping $ns1 from $ns2 via ipv6 with active $family redirect"
669 # ns1 should have seen no packets from ns2, due to redirection
670 expect="packets 0 bytes 0"
671 for dir in "in6" "out6" ; do
672 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
673 if [ $? -ne 0 ]; then
674 bad_counter "$ns1" ns0$dir "$expect" "test_redirect6 3"
679 # ns0 should have seen packets from ns2, due to masquerade
680 expect="packets 1 bytes 104"
681 for dir in "in6" "out6" ; do
682 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns2${dir} | grep -q "$expect")
683 if [ $? -ne 0 ]; then
684 bad_counter "$ns1" ns0$dir "$expect" "test_redirect6 4"
689 ip netns exec "$ns0" nft delete table $family nat
690 if [ $? -ne 0 ]; then
691 echo "ERROR: Could not delete $family nat table" 1>&2
695 test $lret -eq 0 && echo "PASS: $family IPv6 redirection for $ns2"
705 ip netns exec "$ns0" sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
706 ip netns exec "$ns0" sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null
708 ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
709 if [ $? -ne 0 ] ; then
710 echo "ERROR: cannot ping $ns1 from $ns2"
714 expect="packets 1 bytes 84"
715 for dir in "in" "out" ; do
716 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
717 if [ $? -ne 0 ]; then
718 bad_counter "$ns1" $ns2$dir "$expect" "test_redirect 1"
722 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns1${dir} | grep -q "$expect")
723 if [ $? -ne 0 ]; then
724 bad_counter "$ns2" ns1$dir "$expect" "test_redirect 2"
732 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
735 type nat hook prerouting priority 0; policy accept;
736 meta iif veth1 ip protocol icmp ip saddr 10.0.2.99 ip daddr 10.0.1.99 redirect
740 if [ $? -ne 0 ]; then
741 echo "SKIP: Could not add add $family redirect hook"
745 ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
746 if [ $? -ne 0 ] ; then
747 echo "ERROR: cannot ping $ns1 from $ns2 with active $family ip redirect"
751 # ns1 should have seen no packets from ns2, due to redirection
752 expect="packets 0 bytes 0"
753 for dir in "in" "out" ; do
755 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
756 if [ $? -ne 0 ]; then
757 bad_counter "$ns1" ns0$dir "$expect" "test_redirect 3"
762 # ns0 should have seen packets from ns2, due to masquerade
763 expect="packets 1 bytes 84"
764 for dir in "in" "out" ; do
765 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns2${dir} | grep -q "$expect")
766 if [ $? -ne 0 ]; then
767 bad_counter "$ns0" ns0$dir "$expect" "test_redirect 4"
772 ip netns exec "$ns0" nft delete table $family nat
773 if [ $? -ne 0 ]; then
774 echo "ERROR: Could not delete $family nat table" 1>&2
778 test $lret -eq 0 && echo "PASS: $family IP redirection for $ns2"
783 # test port shadowing.
784 # create two listening services, one on router (ns0), one
785 # on client (ns2), which is masqueraded from ns1 point of view.
786 # ns2 sends udp packet coming from service port to ns1, on a highport.
787 # Later, if n1 uses same highport to connect to ns0:service, packet
788 # might be port-forwarded to ns2 instead.
790 # second argument tells if we expect the 'fake-entry' to take effect
791 # (CLIENT) or not (ROUTER).
796 local daddrc="10.0.1.99"
797 local daddrs="10.0.1.1"
801 # make shadow entry, from client (ns2), going to (ns1), port 41404, sport 1405.
802 echo "fake-entry" | ip netns exec "$ns2" timeout 1 socat -u STDIN UDP:"$daddrc":41404,sourceport=1405
804 echo ROUTER | ip netns exec "$ns0" timeout 5 socat -u STDIN UDP4-LISTEN:1405 &
807 echo CLIENT | ip netns exec "$ns2" timeout 5 socat -u STDIN UDP4-LISTEN:1405,reuseport &
812 # ns1 tries to connect to ns0:1405. With default settings this should connect
813 # to client, it matches the conntrack entry created above.
815 result=$(echo "data" | ip netns exec "$ns1" timeout 1 socat - UDP:"$daddrs":1405,sourceport=41404)
817 if [ "$result" = "$expect" ] ;then
818 echo "PASS: portshadow test $test: got reply from ${expect}${logmsg}"
820 echo "ERROR: portshadow test $test: got reply from \"$result\", not $expect as intended"
824 kill $sc_r $sc_c 2>/dev/null
826 # flush udp entries for next test round, if any
827 ip netns exec "$ns0" conntrack -F >/dev/null 2>&1
830 # This prevents port shadow of router service via packet filter,
831 # packets claiming to originate from service port from internal
832 # network are dropped.
833 test_port_shadow_filter()
837 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
838 table $family filter {
840 type filter hook forward priority 0; policy accept;
841 meta iif veth1 udp sport 1405 drop
845 test_port_shadow "port-filter" "ROUTER"
847 ip netns exec "$ns0" nft delete table $family filter
850 # This prevents port shadow of router service via notrack.
851 test_port_shadow_notrack()
855 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
858 type filter hook prerouting priority -300; policy accept;
859 meta iif veth0 udp dport 1405 notrack
862 type filter hook output priority -300; policy accept;
863 meta oif veth0 udp sport 1405 notrack
867 test_port_shadow "port-notrack" "ROUTER"
869 ip netns exec "$ns0" nft delete table $family raw
872 # This prevents port shadow of router service via sport remap.
873 test_port_shadow_pat()
877 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
880 type nat hook postrouting priority -1; policy accept;
881 meta iif veth1 udp sport <= 1405 masquerade to : 1406-65535 random
885 test_port_shadow "pat" "ROUTER"
887 ip netns exec "$ns0" nft delete table $family pat
890 test_port_shadowing()
894 conntrack -h >/dev/null 2>&1
896 echo "SKIP: Could not run nat port shadowing test without conntrack tool"
900 socat -h > /dev/null 2>&1
902 echo "SKIP: Could not run nat port shadowing test without socat tool"
906 ip netns exec "$ns0" sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
907 ip netns exec "$ns0" sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null
909 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
912 type nat hook postrouting priority 0; policy accept;
913 meta oif veth0 masquerade
917 if [ $? -ne 0 ]; then
918 echo "SKIP: Could not add add $family masquerade hook"
922 # test default behaviour. Packet from ns1 to ns0 is redirected to ns2.
923 test_port_shadow "default" "CLIENT"
925 # test packet filter based mitigation: prevent forwarding of
926 # packets claiming to come from the service port.
927 test_port_shadow_filter "$family"
929 # test conntrack based mitigation: connections going or coming
930 # from router:service bypass connection tracking.
931 test_port_shadow_notrack "$family"
933 # test nat based mitigation: fowarded packets coming from service port
934 # are masqueraded with random highport.
935 test_port_shadow_pat "$family"
937 ip netns exec "$ns0" nft delete table $family nat
940 test_stateless_nat_ip()
944 ip netns exec "$ns0" sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
945 ip netns exec "$ns0" sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null
947 ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
948 if [ $? -ne 0 ] ; then
949 echo "ERROR: cannot ping $ns1 from $ns2 before loading stateless rules"
953 ip netns exec "$ns0" nft -f /dev/stdin <<EOF
956 typeof meta iifname . ip saddr . ip daddr : ip daddr
958 "veth1" . 10.0.2.99 . 10.0.1.99 : 10.0.2.2,
962 typeof meta iifname . ip saddr . ip daddr : ip daddr
964 "veth0" . 10.0.1.99 . 10.0.2.2 : 10.0.2.99
969 type filter hook prerouting priority -400; policy accept;
970 ip saddr set meta iifname . ip saddr . ip daddr map @xlate_in
971 ip daddr set meta iifname . ip saddr . ip daddr map @xlate_out
975 if [ $? -ne 0 ]; then
976 echo "SKIP: Could not add ip statless rules"
982 ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
983 if [ $? -ne 0 ] ; then
984 echo "ERROR: cannot ping $ns1 from $ns2 with stateless rules"
988 # ns1 should have seen packets from .2.2, due to stateless rewrite.
989 expect="packets 1 bytes 84"
990 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0insl | grep -q "$expect")
991 if [ $? -ne 0 ]; then
992 bad_counter "$ns1" ns0insl "$expect" "test_stateless 1"
996 for dir in "in" "out" ; do
997 cnt=$(ip netns exec "$ns2" nft list counter inet filter ns1${dir} | grep -q "$expect")
998 if [ $? -ne 0 ]; then
999 bad_counter "$ns2" ns1$dir "$expect" "test_stateless 2"
1004 # ns1 should not have seen packets from ns2, due to masquerade
1005 expect="packets 0 bytes 0"
1006 for dir in "in" "out" ; do
1007 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect")
1008 if [ $? -ne 0 ]; then
1009 bad_counter "$ns1" ns0$dir "$expect" "test_stateless 3"
1013 cnt=$(ip netns exec "$ns0" nft list counter inet filter ns1${dir} | grep -q "$expect")
1014 if [ $? -ne 0 ]; then
1015 bad_counter "$ns0" ns1$dir "$expect" "test_stateless 4"
1022 socat -h > /dev/null 2>&1
1023 if [ $? -ne 0 ];then
1024 echo "SKIP: Could not run stateless nat frag test without socat tool"
1025 if [ $lret -eq 0 ]; then
1029 ip netns exec "$ns0" nft delete table ip stateless
1033 local tmpfile=$(mktemp)
1034 dd if=/dev/urandom of=$tmpfile bs=4096 count=1 2>/dev/null
1036 local outfile=$(mktemp)
1037 ip netns exec "$ns1" timeout 3 socat -u UDP4-RECV:4233 OPEN:$outfile < /dev/null &
1041 # re-do with large ping -> ip fragmentation
1042 ip netns exec "$ns2" timeout 3 socat - UDP4-SENDTO:"10.0.1.99:4233" < "$tmpfile" > /dev/null
1043 if [ $? -ne 0 ] ; then
1044 echo "ERROR: failed to test udp $ns1 to $ns2 with stateless ip nat" 1>&2
1050 cmp "$tmpfile" "$outfile"
1051 if [ $? -ne 0 ]; then
1052 ls -l "$tmpfile" "$outfile"
1053 echo "ERROR: in and output file mismatch when checking udp with stateless nat" 1>&2
1057 rm -f "$tmpfile" "$outfile"
1059 # ns1 should have seen packets from 2.2, due to stateless rewrite.
1060 expect="packets 3 bytes 4164"
1061 cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0insl | grep -q "$expect")
1062 if [ $? -ne 0 ]; then
1063 bad_counter "$ns1" ns0insl "$expect" "test_stateless 5"
1067 ip netns exec "$ns0" nft delete table ip stateless
1068 if [ $? -ne 0 ]; then
1069 echo "ERROR: Could not delete table ip stateless" 1>&2
1073 test $lret -eq 0 && echo "PASS: IP statless for $ns2"
1078 # ip netns exec "$ns0" ping -c 1 -q 10.0.$i.99
1080 ip netns exec ns$i-$sfx nft -f /dev/stdin <<EOF
1099 type ipv4_addr : counter
1100 elements = { 10.0.1.1 : "ns0in",
1102 10.0.1.99 : "ns1in",
1103 10.0.2.99 : "ns2in" }
1107 type ipv6_addr : counter
1108 elements = { dead:1::1 : "ns0in6",
1109 dead:2::1 : "ns0in6",
1110 dead:1::99 : "ns1in6",
1111 dead:2::99 : "ns2in6" }
1115 type ipv4_addr : counter
1116 elements = { 10.0.1.1 : "ns0out",
1117 10.0.2.1 : "ns0out",
1118 10.0.1.99: "ns1out",
1119 10.0.2.99: "ns2out" }
1123 type ipv6_addr : counter
1124 elements = { dead:1::1 : "ns0out6",
1125 dead:2::1 : "ns0out6",
1126 dead:1::99 : "ns1out6",
1127 dead:2::99 : "ns2out6" }
1131 type filter hook input priority 0; policy accept;
1132 counter name ip saddr map @nsincounter
1133 icmpv6 type { "echo-request", "echo-reply" } counter name ip6 saddr map @nsincounter6
1136 type filter hook output priority 0; policy accept;
1137 counter name ip daddr map @nsoutcounter
1138 icmpv6 type { "echo-request", "echo-reply" } counter name ip6 daddr map @nsoutcounter6
1144 # special case for stateless nat check, counter needs to
1145 # be done before (input) ip defragmentation
1146 ip netns exec ns1-$sfx nft -f /dev/stdin <<EOF
1151 type filter hook prerouting priority -400; policy accept;
1152 ip saddr 10.0.2.2 counter name "ns0insl"
1158 # test basic connectivity
1160 ip netns exec "$ns0" ping -c 1 -q 10.0.$i.99 > /dev/null
1161 if [ $? -ne 0 ];then
1162 echo "ERROR: Could not reach other namespace(s)" 1>&2
1166 ip netns exec "$ns0" ping -c 1 -q dead:$i::99 > /dev/null
1167 if [ $? -ne 0 ];then
1168 echo "ERROR: Could not reach other namespace(s) via ipv6" 1>&2
1171 check_counters ns$i-$sfx
1172 if [ $? -ne 0 ]; then
1176 check_ns0_counters ns$i
1177 if [ $? -ne 0 ]; then
1183 if [ $ret -eq 0 ];then
1184 echo "PASS: netns routing/connectivity: $ns0 can reach $ns1 and $ns2"
1189 test_local_dnat6 ip6
1192 test_local_dnat_portonly inet 10.0.1.99
1195 $test_inet_nat && test_local_dnat inet
1196 $test_inet_nat && test_local_dnat6 inet
1198 for flags in "" "fully-random"; do
1200 test_masquerade ip $flags
1201 test_masquerade6 ip6 $flags
1203 $test_inet_nat && test_masquerade inet $flags
1204 $test_inet_nat && test_masquerade6 inet $flags
1211 $test_inet_nat && test_redirect inet
1212 $test_inet_nat && test_redirect6 inet
1215 test_stateless_nat_ip
1217 if [ $ret -ne 0 ];then