kubectl-ko: fix conntrack state (#5038)

Signed-off-by: zhangzujian <zhangzujian.7@gmail.com>

Author: zhangzujian

dist/images/kubectl-ko

@@ -419,22 +419,36 @@ trace(){
 
   case $type in
     icmp)
+      icmp_type=""
+      if [ $af -eq 6 ]; then
+        # echo request
+        icmp_type="6.type == 128"
+      fi
       set -x
-      kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-trace "$ls" "inport == \"$lsp\" && ip.ttl == 64 && icmp && eth.src == $mac && ip$af.src == $srcIP && eth.dst == $dstMac && ip$af.dst == $dst && ct.new"
+      kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-trace --ct=new --ct=new --ct=new --ct=new "$ls" \
+        "inport == \"$lsp\" && ip.ttl == 255 && icmp$icmp_type && eth.src == $mac && ip$af.src == $srcIP && eth.dst == $dstMac && ip$af.dst == $dst"
       ;;
     tcp|udp)
+      tcp_flags=""
+      if [ "$type" = "tcp" ]; then
+        # TCP SYN
+        tcp_flags=" && tcp.flags == 2"
+      fi
       set -x
-      kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-trace "$ls" "inport == \"$lsp\" && ip.ttl == 64 && eth.src == $mac && ip$af.src == $srcIP && eth.dst == $dstMac && ip$af.dst == $dst && $type.src == 10000 && $type.dst == $4 && ct.new"
+      kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-trace --ct=new --ct=new --ct=new --ct=new "$ls" \
+        "inport == \"$lsp\" && ip.ttl == 255 && eth.src == $mac && ip$af.src == $srcIP && eth.dst == $dstMac && ip$af.dst == $dst && $type.src == 30000 && $type.dst == $4 $tcp_flags"
       ;;
     arp)
       case "$4" in
         ""|request)
           set -x
-          kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-trace "$ls" "inport == \"$lsp\" && eth.src == $mac && eth.dst == $dstMac && arp.op == 1 && arp.sha == $mac && arp.tha == 00:00:00:00:00:00 && arp.spa == $srcIP && arp.tpa == $dst"
+          kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-trace "$ls" \
+            "inport == \"$lsp\" && eth.src == $mac && eth.dst == $dstMac && arp.op == 1 && arp.sha == $mac && arp.tha == 00:00:00:00:00:00 && arp.spa == $srcIP && arp.tpa == $dst"
           ;;
         reply)
           set -x
-          kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-trace "$ls" "inport == \"$lsp\" && eth.src == $mac && eth.dst == $dstMac && arp.op == 2 && arp.sha == $mac && arp.tha == $dstMac && arp.spa == $srcIP && arp.tpa == $dst"
+          kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-trace "$ls" \
+            "inport == \"$lsp\" && eth.src == $mac && eth.dst == $dstMac && arp.op == 2 && arp.sha == $mac && arp.tha == $dstMac && arp.spa == $srcIP && arp.tpa == $dst"
           ;;
         *)
           echo "Error: invalid ARP type $4"