Fix that AntreaProxy could unintentionally delete conntrack entries i…

…n zone 0

This is a subsequent PR for #5112. As mentioned in #5112:

> Due to the restriction of the go library 'netlink', there is no API to specify a
  target zone. As a result, when deleting a stale conntrack entry with a
  destination port (such as NodePort), not only will the conntrack entry whose
  destination port is the port added by AntreaProxy be deleted, but also the
  conntrack entry that is not added by AntreaProxy will be deleted. This behavior
  is unexpected, as only the conntrack entries added by AntreaProxy should be
  deleted.

This PR is to fix the issue by incorporating a ct zone filter, which is provided by
the latest go libray `netlink`.

Signed-off-by: Hongliang Liu <lhongliang@vmware.com>

go.mod

@@ -236,3 +236,5 @@ require (
 	sigs.k8s.io/kustomize/kyaml v0.14.3-0.20230601165947-6ce0bf390ce3 // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
 )
+
+replace github.com/vishvananda/netlink v1.2.1-beta.2 => github.com/hongliangl/netlink v1.1.1-0.20240407022104-46eb8cc4f2b9

go.sum

@@ -420,6 +420,8 @@ github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uG
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/hashicorp/memberlist v0.5.1 h1:mk5dRuzeDNis2bi6LLoQIXfMH7JQvAzt3mQD0vNZZUo=
 github.com/hashicorp/memberlist v0.5.1/go.mod h1:zGDXV6AqbDTKTM6yxW0I4+JtFzZAJVoIPvss4hV8F24=
+github.com/hongliangl/netlink v1.1.1-0.20240407022104-46eb8cc4f2b9 h1:B+OBUWAK0hTP9+Sbl2Gtu+kmnW5iKpfYuTUy9jNd6Lo=
+github.com/hongliangl/netlink v1.1.1-0.20240407022104-46eb8cc4f2b9/go.mod h1:whJevzBpTrid75eZy99s3DqCmy05NfibNaF2Ol5Ox5A=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/imdario/mergo v0.3.5/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
@@ -725,8 +727,6 @@ github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljT
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
 github.com/vektah/gqlparser v1.1.2/go.mod h1:1ycwN7Ij5njmMkPPAOaRFY4rET2Enx7IkVv3vaXspKw=
 github.com/vishvananda/netlink v1.1.1-0.20211101163509-b10eb8fe5cf6/go.mod h1:twkDnbuQxJYemMlGd4JFIcuhgX83tXhKS2B/PRMpOho=
-github.com/vishvananda/netlink v1.2.1-beta.2 h1:Llsql0lnQEbHj0I1OuKyp8otXp0r3q0mPkuhwHfStVs=
-github.com/vishvananda/netlink v1.2.1-beta.2/go.mod h1:twkDnbuQxJYemMlGd4JFIcuhgX83tXhKS2B/PRMpOho=
 github.com/vishvananda/netns v0.0.0-20200728191858-db3c7e526aae/go.mod h1:DD4vA1DwXk04H54A1oHXtwZmA0grkVMdPxx/VGLCah0=
 github.com/vishvananda/netns v0.0.4 h1:Oeaw1EM2JMxD51g9uhtC0D7erkIjgmj8+JZc26m1YX8=
 github.com/vishvananda/netns v0.0.4/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZlaprSwhNNJM=
@@ -943,6 +943,7 @@ golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
 golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=

pkg/agent/route/route_linux.go

@@ -33,6 +33,7 @@ import (
 	utilnet "k8s.io/utils/net"
 
 	"antrea.io/antrea/pkg/agent/config"
+	"antrea.io/antrea/pkg/agent/openflow"
 	"antrea.io/antrea/pkg/agent/servicecidr"
 	"antrea.io/antrea/pkg/agent/types"
 	"antrea.io/antrea/pkg/agent/util/ipset"
@@ -1919,28 +1920,36 @@ func (c *Client) DeleteRouteForLink(cidr *net.IPNet, linkIndex int) error {
 func (c *Client) ClearConntrackEntryForService(svcIP net.IP, svcPort uint16, endpointIP net.IP, protocol binding.Protocol) error {
 	var protoVar uint8
 	var ipFamily netlink.InetFamily
+	var zone uint16
 	switch protocol {
 	case binding.ProtocolTCP:
 		ipFamily = unix.AF_INET
 		protoVar = unix.IPPROTO_TCP
+		zone = openflow.CtZone
 	case binding.ProtocolTCPv6:
 		ipFamily = unix.AF_INET6
 		protoVar = unix.IPPROTO_TCP
+		zone = openflow.CtZoneV6
 	case binding.ProtocolUDP:
 		ipFamily = unix.AF_INET
 		protoVar = unix.IPPROTO_UDP
+		zone = openflow.CtZone
 	case binding.ProtocolUDPv6:
 		ipFamily = unix.AF_INET6
 		protoVar = unix.IPPROTO_UDP
+		zone = openflow.CtZoneV6
 	case binding.ProtocolSCTP:
 		ipFamily = unix.AF_INET
 		protoVar = unix.IPPROTO_SCTP
+		zone = openflow.CtZone
 	case binding.ProtocolSCTPv6:
 		ipFamily = unix.AF_INET6
 		protoVar = unix.IPPROTO_SCTP
+		zone = openflow.CtZoneV6
 	}
 	filter := &netlink.ConntrackFilter{}
 	filter.AddProtocol(protoVar)
+	filter.AddZone(zone)
 	if svcIP != nil {
 		filter.AddIP(netlink.ConntrackOrigDstIP, svcIP)
 	}