Drop ip packets with ct status set to invalid in post snat and
lb_aff_learn router stages.
Skip ICMPv{4,6} error messages packet in ct.inv rules in order to avoid
to introduce too complicated code.

Reported-at: https://bugzilla.redhat.com/show_bug.cgi?id=2160685
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Lorenzo Bianconi <[email protected]>
---
Changes since v3:
- rebase on top of ovn main branch
Changes since v2:
- rebase on top of ovn main branch
- cosmetics
Changes since v1:
- skip ICMPv{4,6} error messages packet in ct.inv rules
- this series is based on the following series not yet applied in ovn master:
  https://patchwork.ozlabs.org/project/ovn/list/?series=343841
---
 northd/northd.c         | 30 ++++++++++++++++++++-
 northd/ovn-northd.8.xml | 43 +++++++++++++++++++++++++++--
 tests/ovn-northd.at     | 13 +++++++++
 tests/ovn.at            | 60 +++++++++++++++++++++--------------------
 tests/system-ovn.at     | 16 +++++------
 5 files changed, 122 insertions(+), 40 deletions(-)

diff --git a/northd/northd.c b/northd/northd.c
index 5f0b436c2..5884f50e1 100644
--- a/northd/northd.c
+++ b/northd/northd.c
@@ -13822,6 +13822,31 @@ build_lrouter_out_is_dnat_local(struct hmap *lflows, 
struct ovn_datapath *od,
                             &nat->header_);
 }
 
+static void
+build_lrouter_drop_ct_inv_flow(struct ovn_datapath *od, struct hmap *lflows)
+{
+    if (!od->nbr) {
+        return;
+    }
+
+    ovn_lflow_add(lflows, od, S_ROUTER_OUT_POST_SNAT, 0, "1", "next;");
+
+    if (use_ct_inv_match) {
+        ovn_lflow_add(lflows, od, S_ROUTER_OUT_POST_SNAT, 150,
+                      "((ip4 && icmp4.type == 3 && icmp4.code == 4) ||"
+                      " (ip6 && icmp6.type == 2 && icmp6.code == 0))",
+                      "next;");
+        ovn_lflow_add(lflows, od, S_ROUTER_OUT_POST_SNAT, 100,
+                      "ip && ct.trk && ct.inv", debug_drop_action());
+        ovn_lflow_add(lflows, od, S_ROUTER_IN_LB_AFF_LEARN, 250,
+                      "((ip4 && icmp4.type == 3 && icmp4.code == 4) ||"
+                      " (ip6 && icmp6.type == 2 && icmp6.code == 0))",
+                      "next;");
+        ovn_lflow_add(lflows, od, S_ROUTER_IN_LB_AFF_LEARN, 200,
+                      "ip && ct.trk && ct.inv", debug_drop_action());
+    }
+}
+
 static void
 build_lrouter_out_snat_flow(struct hmap *lflows, struct ovn_datapath *od,
                             const struct nbrec_nat *nat, struct ds *match,
@@ -14210,7 +14235,6 @@ build_lrouter_nat_defrag_and_lb(struct ovn_datapath 
*od, struct hmap *lflows,
     ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, 0, "1", "next;");
     ovn_lflow_add(lflows, od, S_ROUTER_OUT_UNDNAT, 0, "1", "next;");
     ovn_lflow_add(lflows, od, S_ROUTER_OUT_POST_UNDNAT, 0, "1", "next;");
-    ovn_lflow_add(lflows, od, S_ROUTER_OUT_POST_SNAT, 0, "1", "next;");
     ovn_lflow_add(lflows, od, S_ROUTER_OUT_EGR_LOOP, 0, "1", "next;");
     ovn_lflow_add(lflows, od, S_ROUTER_IN_ECMP_STATEFUL, 0, "1", "next;");
 
@@ -14264,6 +14288,9 @@ build_lrouter_nat_defrag_and_lb(struct ovn_datapath 
*od, struct hmap *lflows,
      * flag set. Some NICs are unable to offload these flows.
      */
     if (od->is_gw_router && (od->nbr->n_nat || od->has_lb_vip)) {
+        /* Do not send ND or ICMP packets to connection tracking. */
+        ovn_lflow_add(lflows, od, S_ROUTER_OUT_UNDNAT, 100,
+                      "nd || nd_rs || nd_ra", "next;");
         ovn_lflow_add(lflows, od, S_ROUTER_OUT_UNDNAT, 50,
                       "ip", "flags.loopback = 1; ct_dnat;");
         ovn_lflow_add(lflows, od, S_ROUTER_OUT_POST_UNDNAT, 50,
@@ -14588,6 +14615,7 @@ build_lswitch_and_lrouter_iterate_by_od(struct 
ovn_datapath *od,
     build_lrouter_nat_defrag_and_lb(od, lsi->lflows, lsi->ports, &lsi->match,
                                     &lsi->actions, lsi->meter_groups,
                                     lsi->features);
+    build_lrouter_drop_ct_inv_flow(od, lsi->lflows);
     build_lb_affinity_default_flows(od, lsi->lflows);
 }
 
diff --git a/northd/ovn-northd.8.xml b/northd/ovn-northd.8.xml
index 5d513e65a..2e7f0cac5 100644
--- a/northd/ovn-northd.8.xml
+++ b/northd/ovn-northd.8.xml
@@ -3656,6 +3656,17 @@ icmp6 {
     </p>
 
     <ul>
+      <li>
+        For ICMPv4/ICMPv6 packet too big traffic, a priority-250 flow with
+        action <code>next;</code>.
+      </li>
+
+      <li>
+        If <code>use_ct_inv_match</code> is set, a priority-200 flow
+        matches <code>ip &amp;&amp; ct.trk &amp;&amp; ct.inv</code> with
+        action <code>drop;</code>.
+      </li>
+
       <li>
         For all the configured load balancing rules for a logical router where
         a positive affinity timeout <var>T</var> is specified in <code>options
@@ -4715,6 +4726,11 @@ nd_ns {
     <h3>Egress Table 1: UNDNAT on Gateway Routers</h3>
 
     <ul>
+      <li>
+        For IPv6 Neighbor Discovery or Router Solicitation/Advertisement
+        traffic, a priority-100 flow with action <code>next;</code>.
+      </li>
+
       <li>
         For all IP packets, a priority-50 flow with an action
         <code>flags.loopback = 1; ct_dnat;</code>.
@@ -4992,7 +5008,30 @@ nd_ns {
       </li>
     </ul>
 
-    <h3>Egress Table 4: Egress Loopback</h3>
+    <h3>Egress Table 4: Post SNAT</h3>
+
+    <p>
+      Packets reaching this table are processed according to the flows below:
+      <ul>
+        <li>
+          For ICMPv4/ICMPv6 packet too big traffic, a priority-150 flow with
+          action <code>next;</code>.
+        </li>
+
+        <li>
+          If <code>use_ct_inv_match</code> is set, a priority-100 flow
+          matches <code>ip &amp;&amp; ct.trk &amp;&amp; ct.inv</code> with
+          action <code>drop;</code>.
+        </li>
+
+        <li>
+          A priority-0 logical flow that matches all packets not already
+          handled (match <code>1</code>) and action <code>next;</code>.
+        </li>
+      </ul>
+    </p>
+
+    <h3>Egress Table 5: Egress Loopback</h3>
 
     <p>
       For distributed logical routers where one of the logical router
@@ -5064,7 +5103,7 @@ clone {
       </li>
     </ul>
 
-    <h3>Egress Table 5: Delivery</h3>
+    <h3>Egress Table 6: Delivery</h3>
 
     <p>
       Packets that reach this table are ready for delivery.  It contains:
diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
index ef29233db..2855f198e 100644
--- a/tests/ovn-northd.at
+++ b/tests/ovn-northd.at
@@ -3813,6 +3813,7 @@ AT_CHECK([grep "lr_out_snat" lr0flows | sed 
's/table=./table=?/' | sort], [0], [
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -3864,6 +3865,7 @@ AT_CHECK([grep "lr_out_snat" lr0flows | sed 
's/table=./table=?/' | sort], [0], [
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -3929,6 +3931,7 @@ AT_CHECK([grep "lr_out_snat" lr0flows | sed 
's/table=./table=?/' | sort], [0], [
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -3970,6 +3973,7 @@ AT_CHECK([grep "lr_out_snat" lr0flows | grep 
skip_snat_for_lb | sed 's/table=./t
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -5315,6 +5319,7 @@ AT_CHECK([grep "lr_out_chk_dnat_local" lr0flows | sed 
's/table=./table=?/' | sor
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -5380,6 +5385,7 @@ AT_CHECK([grep "lr_out_chk_dnat_local" lr0flows | sed 
's/table=./table=?/' | sor
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -5450,6 +5456,7 @@ AT_CHECK([grep "lr_out_chk_dnat_local" lr0flows | sed 
's/table=./table=?/' | sor
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -5533,6 +5540,7 @@ AT_CHECK([grep "lr_out_chk_dnat_local" lr0flows | sed 
's/table=./table=?/' | sor
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -5595,6 +5603,7 @@ AT_CHECK([grep "lr_out_chk_dnat_local" lr0flows | sed 
's/table=./table=?/' | sor
 
 AT_CHECK([grep "lr_out_undnat" lr0flows | sed 's/table=./table=?/' | sort], 
[0], [dnl
   table=? (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
+  table=? (lr_out_undnat      ), priority=100  , match=(nd || nd_rs || nd_ra), 
action=(next;)
   table=? (lr_out_undnat      ), priority=50   , match=(ip), 
action=(flags.loopback = 1; ct_dnat;)
 ])
 
@@ -8231,6 +8240,8 @@ AT_CHECK([grep "lr_in_lb_aff_check" R1flows | sort], [0], 
[dnl
 ])
 AT_CHECK([grep "lr_in_lb_aff_learn" R1flows | sort], [0], [dnl
   table=8 (lr_in_lb_aff_learn ), priority=0    , match=(1), action=(next;)
+  table=8 (lr_in_lb_aff_learn ), priority=200  , match=(ip && ct.trk && 
ct.inv), action=(drop;)
+  table=8 (lr_in_lb_aff_learn ), priority=250  , match=(((ip4 && icmp4.type == 
3 && icmp4.code == 4) || (ip6 && icmp6.type == 2 && icmp6.code == 0))), 
action=(next;)
 ])
 
 ovn-nbctl --wait=sb set load_balancer lb0 options:affinity_timeout=60
@@ -8277,6 +8288,8 @@ AT_CHECK([grep "lr_in_lb_aff_learn" R1flows | sort], [0], 
[dnl
   table=8 (lr_in_lb_aff_learn ), priority=0    , match=(1), action=(next;)
   table=8 (lr_in_lb_aff_learn ), priority=100  , match=(reg9[[6]] == 0 && 
ct.new && ip4 && reg0 == 172.16.0.10 && reg9[[16..31]] == 80 && ip4.dst == 
10.0.0.2 && tcp.dst == 80), action=(commit_lb_aff(vip = "172.16.0.10:80", 
backend = "10.0.0.2:80", proto = tcp, timeout = 60); /* drop */)
   table=8 (lr_in_lb_aff_learn ), priority=100  , match=(reg9[[6]] == 0 && 
ct.new && ip4 && reg0 == 172.16.0.10 && reg9[[16..31]] == 80 && ip4.dst == 
20.0.0.2 && tcp.dst == 80), action=(commit_lb_aff(vip = "172.16.0.10:80", 
backend = "20.0.0.2:80", proto = tcp, timeout = 60); /* drop */)
+  table=8 (lr_in_lb_aff_learn ), priority=200  , match=(ip && ct.trk && 
ct.inv), action=(drop;)
+  table=8 (lr_in_lb_aff_learn ), priority=250  , match=(((ip4 && icmp4.type == 
3 && icmp4.code == 4) || (ip6 && icmp6.type == 2 && icmp6.code == 0))), 
action=(next;)
 ])
 
 AS_BOX([Test LR flows - skip_snat=true])
diff --git a/tests/ovn.at b/tests/ovn.at
index c2883ffca..4aa67673e 100644
--- a/tests/ovn.at
+++ b/tests/ovn.at
@@ -12254,7 +12254,7 @@ nexthop_mac="f00000010204"
 AS_BOX([Send ip packet from foo1 to 8.8.8.8])
 src_mac="f00000010203"
 dst_mac="000001010203"
-packet=${foo_mac}${foo1_mac}08004500001c0000000040110000${foo1_ip}${dst_ip}0035111100080000
+packet=${foo_mac}${foo1_mac}080045000028000000004006a916${foo1_ip}${dst_ip}0035111112345678000000005002faf069450000
 
 AS_BOX([Wait for GARPs announcing gw IP to arrive])
 OVS_WAIT_UNTIL([
@@ -12265,15 +12265,12 @@ grep actions=mod_dl_dst:f0:00:00:01:02:04 | wc -l` 
-eq 1
 AS_BOX([Verify VLAN tagged packet on bridge connecting hv1 and hv2])
 # VLAN tagged packet with router port(192.168.1.1) MAC as destination MAC
 # is expected on bridge connecting hv1 and hv2
-expected=${foo_mac}${foo1_mac}8100000208004500001c0000000040110000${foo1_ip}${dst_ip}0035111100080000
+expected=${foo_mac}${foo1_mac}81000002080045000028000000004006a916${foo1_ip}${dst_ip}0035111112345678000000005002faf069450000
 echo $expected > hv1-br-ex_n2.expected
 
 AS_BOX([Verify packet at outside1 i.e nexthop(172.16.1.1) port])
 # Packet to Expect at outside1 i.e nexthop(172.16.1.1) port.
-# As connection tracking not enabled for this test, snat can't be done on the 
packet.
-# We still see foo1 as the source ip address. But source mac(gateway MAC) and
-# dest mac(nexthop mac) are properly configured.
-expected=${nexthop_mac}${gw_mac}08004500001c000000003f110100${foo1_ip}${dst_ip}0035111100080000
+expected=${nexthop_mac}${gw_mac}080045000028000000003f06beaa${gw_ip}${dst_ip}0035111112345678000000005002faf07dd90000
 echo $expected > hv3-vif1.expected
 
 check as hv1 ovs-appctl revalidator/purge
@@ -12304,7 +12301,7 @@ cat hv1-br-ex_n2.expected > expout
 AT_CHECK([sort hv1-br-ex_n2], [0], [expout])
 
 AS_BOX([Check expected packet on nexthop interface])
-$PYTHON "$ovs_srcdir/utilities/ovs-pcap.in" hv3/vif1-tx.pcap | grep 
${foo1_ip}${dst_ip} | uniq > hv3-vif1
+$PYTHON "$ovs_srcdir/utilities/ovs-pcap.in" hv3/vif1-tx.pcap | grep 
${gw_ip}${dst_ip} | uniq > hv3-vif1
 cat hv3-vif1.expected > expout
 AT_CHECK([sort hv3-vif1], [0], [expout])
 
@@ -19705,7 +19702,7 @@ test_ip_packet_larger() {
     # Set the packet length to 114.
     pkt_len=0072
     packet=${dst_mac}${src_mac}08004500${pkt_len}000000004001c3dd
-    orig_packet_l3=${src_ip}${dst_ip}0304fcfb00000000
+    orig_packet_l3=${src_ip}${dst_ip}0800f7ff00000000
     orig_packet_l3=${orig_packet_l3}000000000000000000000000000000000000
     orig_packet_l3=${orig_packet_l3}000000000000000000000000000000000000
     orig_packet_l3=${orig_packet_l3}000000000000000000000000000000000000
@@ -19729,10 +19726,10 @@ test_ip_packet_larger() {
         # Packet to expect at br-phys.
         src_mac="000020201213"
         dst_mac="00000012af11"
-        src_ip=`ip_to_hex 10 0 0 3`
+        src_ip=`ip_to_hex 172 168 0 100`
         dst_ip=`ip_to_hex 172 168 0 3`
-        expected=${dst_mac}${src_mac}08004500${pkt_len}000000003f01c4dd
-        expected=${expected}${src_ip}${dst_ip}0304fcfb00000000
+        expected=${dst_mac}${src_mac}08004500${pkt_len}000000003f0121d4
+        expected=${expected}${src_ip}${dst_ip}0800f7ff00000000
         expected=${expected}000000000000000000000000000000000000
         expected=${expected}000000000000000000000000000000000000
         expected=${expected}000000000000000000000000000000000000
@@ -19793,7 +19790,7 @@ test_ip_packet_larger_ext() {
     # Set the packet length to 114.
     pkt_len=0072
     packet=${dst_mac}${src_mac}08004500${pkt_len}000000004001${checksum}
-    orig_packet_l3=${src_ip}${dst_ip}0900000000000000
+    orig_packet_l3=${src_ip}${dst_ip}0800f7ff00000000
     orig_packet_l3=${orig_packet_l3}000000000000000000000000000000000000
     orig_packet_l3=${orig_packet_l3}000000000000000000000000000000000000
     orig_packet_l3=${orig_packet_l3}000000000000000000000000000000000000
@@ -19810,7 +19807,7 @@ test_ip_packet_larger_ext() {
     dst_ip=`ip_to_hex 172 168 0 4`
     # pkt len should be 146 (28 (icmp packet) + 118 (orig ip + payload))
     reply_pkt_len=008e
-    ip_csum=f39b
+    ip_csum=$7
     
icmp_reply=${src_mac}${dst_mac}08004500${reply_pkt_len}00004000fe01${reply_checksum}
     icmp_reply=${icmp_reply}${src_ip}${dst_ip}0304${ip_csum}0000$(printf 
"%04x" $mtu)
     icmp_reply=${icmp_reply}4500${pkt_len}000000004001${checksum}
@@ -19985,10 +19982,10 @@ OVS_WAIT_FOR_OUTPUT([
 ])
 
 AS_BOX([testing ingress traffic mtu 100 - IPv4])
-test_ip_packet_larger_ext 1 000020201213 $(ip_to_hex 172 168 0 100) 20cf 100 
22b6
+test_ip_packet_larger_ext 1 000020201213 $(ip_to_hex 172 168 0 100) 20d3 100 
22b6 fc97
 
 AS_BOX([testing ingress traffic mtu 100 - IPv4 FIP])
-test_ip_packet_larger_ext 2 f00000010204 $(ip_to_hex 172 168 0 110) 20c5 100 
22ac
+test_ip_packet_larger_ext 2 f00000010204 $(ip_to_hex 172 168 0 110) 20c5 100 
22ac fc9b
 
 AS_BOX([testing ingress traffic mtu 100 - IPv6])
 test_ip6_packet_larger_ext 1 000020201213 20000000000000000000000000000001 100 
cc7a
@@ -20055,10 +20052,10 @@ OVS_WAIT_FOR_OUTPUT([
 ])
 
 AS_BOX([testing ingress traffic mtu 100 for gw router - IPv4])
-test_ip_packet_larger_ext 1 000020201213 $(ip_to_hex 172 168 0 100) 20cf 100 
22b6
+test_ip_packet_larger_ext 1 000020201213 $(ip_to_hex 172 168 0 100) 20d3 100 
22b6 fc97
 
 AS_BOX([testing ingress traffic mtu 100 for gw router - IPv6])
-test_ip6_packet_larger_ext 1 000020201213 20000000000000000000000000000001 100 
cc7a
+test_ip6_packet_larger_ext 1 000020201213 20000000000000000000000000000001 100 
cc7a fc9b
 
 OVN_CLEANUP([hv1])
 AT_CLEANUP
@@ -27284,22 +27281,24 @@ sleep 5
 send_ipv4_pkt() {
     local hv=$1 inport=$2 eth_src=$3 eth_dst=$4
     local ip_src=$5 ip_dst=$6
-    
packet=${eth_dst}${eth_src}08004500001c0000000040110000${ip_src}${ip_dst}0035111100080000
+    local ip_cksum=$7 tcp_cksum=$8
+    
packet=${eth_dst}${eth_src}080045000028000000004006${ip_cksum}${ip_src}${ip_dst}0035111112345678000000005002faf0${tcp_cksum}0000
     tcpdump_hex $packet
     as $hv ovs-appctl netdev-dummy/receive ${inport} ${packet}
 }
 
 send_icmp6_packet() {
-    local hv=$1 inport=$2 eth_src=$3 eth_dst=$4 ipv6_src=$5 ipv6_dst=$6
+    local hv=$1 inport=$2 eth_src=$3 eth_dst=$4 ipv6_src=$5 ipv6_dst=$6 
tcp_cksum=$7
 
-    local ip6_hdr=6000000000083aff${ipv6_src}${ipv6_dst}
-    local packet=${eth_dst}${eth_src}86dd${ip6_hdr}8000dcb662f00001
+    local ip6_hdr=60000000001406ff${ipv6_src}${ipv6_dst}
+    local 
packet=${eth_dst}${eth_src}86dd${ip6_hdr}0035111112345678000000005002faf0${tcp_cksum}0000
 
     as $hv ovs-appctl netdev-dummy/receive ${inport} ${packet}
 }
 
 send_ipv4_pkt hv1 hv1-vif1 505400000003 00000000ff01 \
-    $(ip_to_hex 10 0 0 3) $(ip_to_hex 172 168 0 120)
+    $(ip_to_hex 10 0 0 3) $(ip_to_hex 172 168 0 120) \
+    c3ad 83dc
 
 AT_CAPTURE_FILE([offlows2])
 OVS_WAIT_UNTIL([
@@ -27316,7 +27315,8 @@ AT_CHECK([
 
 # Send the pkt from sw0-port2. Packet should not be marked.
 send_ipv4_pkt hv1 hv1-vif2 505400000004 00000000ff01 \
-    $(ip_to_hex 10 0 0 4) $(ip_to_hex 172 168 0 120)
+    $(ip_to_hex 10 0 0 4) $(ip_to_hex 172 168 0 120) \
+    c3ac 83db
 
 AT_CHECK([
     test 1 -eq $(as hv1 ovs-ofctl dump-flows br-phys table=0 | \
@@ -27350,7 +27350,8 @@ AT_CHECK([
 
 ovn-nbctl set logical_router_policy $pol1 options:pkt_mark=2
 send_ipv4_pkt hv1 hv1-vif1 505400000003 00000000ff01 \
-    $(ip_to_hex 10 0 0 3) $(ip_to_hex 172 168 0 120)
+    $(ip_to_hex 10 0 0 3) $(ip_to_hex 172 168 0 120) \
+    c3ad 83dc
 
 OVS_WAIT_UNTIL([
     test 1 -eq $(as hv1 ovs-ofctl dump-flows br-int table=23 | \
@@ -27383,7 +27384,8 @@ AT_CHECK([
 # Send with src ip 10.0.0.5. The reroute policy should be hit
 # and the packet should be marked with 5.
 send_ipv4_pkt hv1 hv1-vif1 505400000003 00000000ff01 \
-    $(ip_to_hex 10 0 0 5) $(ip_to_hex 172 168 0 120)
+    $(ip_to_hex 10 0 0 5) $(ip_to_hex 172 168 0 120) \
+    c3ab 83da
 
 OVS_WAIT_UNTIL([
     test 1 -eq $(as hv1 ovs-ofctl dump-flows br-phys table=0 | \
@@ -27395,7 +27397,7 @@ OVS_WAIT_UNTIL([
 src_ip6=aef00000000000000000000000000004
 dst_ip6=bef00000000000000000000000000004
 
-send_icmp6_packet hv1 hv1-vif2 505400000004 00000000ff01 ${src_ip6} ${dst_ip6}
+send_icmp6_packet hv1 hv1-vif2 505400000004 00000000ff01 ${src_ip6} ${dst_ip6} 
cd16
 
 OVS_WAIT_UNTIL([
     test 1 -eq $(as hv1 ovs-ofctl dump-flows br-phys table=0 | \
@@ -27415,7 +27417,7 @@ AT_CHECK([
 src_ip6=aef00000000000000000000000000004
 dst_ip6=bef00000000000000000000000000005
 
-send_icmp6_packet hv1 hv1-vif2 505400000004 00000000ff01 ${src_ip6} ${dst_ip6}
+send_icmp6_packet hv1 hv1-vif2 505400000004 00000000ff01 ${src_ip6} ${dst_ip6} 
cd15
 
 OVS_WAIT_UNTIL([
     test 1 -eq $(as hv1 ovs-ofctl dump-flows br-phys table=0 | \
@@ -28689,7 +28691,7 @@ src_mac="f00000000102"
 dst_mac="000000000101"
 src_ip=`ip_to_hex 10 0 1 2`
 dst_ip=`ip_to_hex 10 0 1 1`
-packet=${dst_mac}${src_mac}08004500001c0000000040110000${src_ip}${dst_ip}0035111100080000
+packet=${dst_mac}${src_mac}08004500001c00000000401164cf${src_ip}${dst_ip}0035111100080000
 as hv1 ovs-appctl netdev-dummy/receive hv1-vif1 $packet
 
 # Even after configuring a router owned IP for SNAT, no packet-ins should
@@ -28715,7 +28717,7 @@ src_mac="f00000000202"
 dst_mac="000000000201"
 src_ip=`ip_to_hex 10 0 2 2`
 dst_ip=`ip_to_hex 10 0 1 1`
-packet=${dst_mac}${src_mac}08004500001c0000000040110000${src_ip}${dst_ip}0035111100080000
+packet=${dst_mac}${src_mac}08004500001c00000000401163cf${src_ip}${dst_ip}0035111100080000
 as hv1 ovs-appctl netdev-dummy/receive hv1-vif2 $packet
 
 # Still no packet-ins should reach ovn-controller.
diff --git a/tests/system-ovn.at b/tests/system-ovn.at
index 8afb4db56..e706c25ca 100644
--- a/tests/system-ovn.at
+++ b/tests/system-ovn.at
@@ -6131,10 +6131,10 @@ 
tcp,orig=(src=172.16.0.1,dst=10.0.0.2,sport=<cleared>,dport=<cleared>),reply=(sr
 # Ensure datapaths show conntrack states as expected
 # Like with conntrack entries, we shouldn't try to predict
 # port binding tunnel keys. So omit them from expected labels.
-AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(+new-est-rpl+trk).*ct(.*label=0x401020400000000/.*)' -c], [0], [dnl
+AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(+new-est-rpl-inv+trk).*ct(.*label=0x401020400000000/.*)' -c], [0], 
[dnl
 1
 ])
-AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(-new+est+rpl+trk).*ct_label(0x401020400000000)' -c], [0], [dnl
+AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(-new+est+rpl-inv+trk).*ct_label(0x401020400000000)' -c], [0], [dnl
 1
 ])
 
@@ -6149,10 +6149,10 @@ ovn-nbctl set Logical_Switch_Port r2-ext \
 ovn-nbctl --wait=hv sync
 
 NS_CHECK_EXEC([bob1], [nc -z 10.0.0.2 80], [0])
-AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(+new-est-rpl+trk).*ct(.*label=0x1001020400000000/.*)' -c], [0], [dnl
+AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(+new-est-rpl-inv+trk).*ct(.*label=0x1001020400000000/.*)' -c], [0], 
[dnl
 1
 ])
-AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(-new+est+rpl+trk).*ct_label(0x1001020400000000)' -c], [0], [dnl
+AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(-new+est+rpl-inv+trk).*ct_label(0x1001020400000000)' -c], [0], [dnl
 1
 ])
 
@@ -6316,11 +6316,11 @@ NS_CHECK_EXEC([bob1], [nc -6 -z fd01::2 80], [0])
 # Ensure datapaths show conntrack states as expected
 # Like with conntrack entries, we shouldn't try to predict
 # port binding tunnel keys. So omit them from expected labels.
-AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(+new-est-rpl+trk).*ct(.*label=0x401020400000000/.*)' -c], [0], [dnl
+AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(+new-est-rpl-inv+trk).*ct(.*label=0x401020400000000/.*)' -c], [0], 
[dnl
 1
 ])
 
-AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(-new+est+rpl+trk).*ct_label(0x401020400000000)' -c], [0], [dnl
+AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(-new+est+rpl-inv+trk).*ct_label(0x401020400000000)' -c], [0], [dnl
 1
 ])
 
@@ -6343,10 +6343,10 @@ ovn-nbctl set Logical_Switch_Port r2-ext \
 
 NS_CHECK_EXEC([bob1], [nc -6 -z fd01::2 80], [0])
 
-AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(+new-est-rpl+trk).*ct(.*label=0x1001020400000000/.*)' -c], [0], [dnl
+AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(+new-est-rpl-inv+trk).*ct(.*label=0x1001020400000000/.*)' -c], [0], 
[dnl
 1
 ])
-AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(-new+est+rpl+trk).*ct_label(0x1001020400000000)' -c], [0], [dnl
+AT_CHECK([ovs-appctl dpctl/dump-flows | grep 
'ct_state(-new+est+rpl-inv+trk).*ct_label(0x1001020400000000)' -c], [0], [dnl
 1
 ])
 
-- 
2.39.2

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