[tunnel] fix utiliptables.New calls for k8s v1.34

k8s.io/kubernetes v1.34 removed the exec.Interface parameter from
utiliptables.New — it now only takes the protocol.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: dilyevsky

pkg/tunnel/router/client_netlink_linux.go

@@ -16,7 +16,7 @@ import (
 	"golang.org/x/sync/errgroup"
 	"golang.zx2c4.com/wireguard/tun"
 	utiliptables "k8s.io/kubernetes/pkg/util/iptables"
-	utilexec "k8s.io/utils/exec"
+
 
 	"github.com/apoxy-dev/apoxy/pkg/netstack"
 	"github.com/apoxy-dev/apoxy/pkg/tunnel/connection"
@@ -111,8 +111,8 @@ func newClientNetlinkRouter(opts ...Option) (*ClientNetlinkRouter, error) {
 	return &ClientNetlinkRouter{
 		tunDev:  tunDev,
 		tunLink: tunLink,
-		iptV4:   utiliptables.New(utilexec.New(), utiliptables.ProtocolIPv4),
-		iptV6:   utiliptables.New(utilexec.New(), utiliptables.ProtocolIPv6),
+		iptV4:   utiliptables.New(utiliptables.ProtocolIPv4),
+		iptV6:   utiliptables.New(utiliptables.ProtocolIPv6),
 		smux:    connection.NewSrcMuxedConn(),
 		options: options,
 		closed:  make(chan struct{}),

pkg/tunnel/router/icx_netlink_linux.go

@@ -26,7 +26,7 @@ import (
 	"gvisor.dev/gvisor/pkg/tcpip"
 	proxyutil "k8s.io/kubernetes/pkg/proxy/util"
 	utiliptables "k8s.io/kubernetes/pkg/util/iptables"
-	utilexec "k8s.io/utils/exec"
+
 
 	"github.com/apoxy-dev/apoxy/pkg/netstack"
 	"github.com/apoxy-dev/apoxy/pkg/tunnel/connection"
@@ -179,8 +179,8 @@ func NewICXNetlinkRouter(opts ...Option) (*ICXNetlinkRouter, error) {
 		ingressFilter: ingressFilter,
 		pcapFile:      pcapFile,
 		tun:           tun,
-		iptV4:         utiliptables.New(utilexec.New(), utiliptables.ProtocolIPv4),
-		iptV6:         utiliptables.New(utilexec.New(), utiliptables.ProtocolIPv6),
+		iptV4:         utiliptables.New(utiliptables.ProtocolIPv4),
+		iptV6:         utiliptables.New(utiliptables.ProtocolIPv6),
 		extAddrs:      extAddrsList,
 	}, nil
 }

pkg/tunnel/router/server_netlink_linux.go

@@ -17,7 +17,7 @@ import (
 	"golang.zx2c4.com/wireguard/tun"
 	proxyutil "k8s.io/kubernetes/pkg/proxy/util"
 	utiliptables "k8s.io/kubernetes/pkg/util/iptables"
-	utilexec "k8s.io/utils/exec"
+
 
 	"github.com/apoxy-dev/apoxy/pkg/netstack"
 	"github.com/apoxy-dev/apoxy/pkg/tunnel/connection"
@@ -120,8 +120,8 @@ func NewNetlinkRouter(opts ...Option) (*NetlinkRouter, error) {
 		tunDev:  tunDev,
 		tunLink: tunLink,
 
-		iptV4: utiliptables.New(utilexec.New(), utiliptables.ProtocolIPv4),
-		iptV6: utiliptables.New(utilexec.New(), utiliptables.ProtocolIPv6),
+		iptV4: utiliptables.New(utiliptables.ProtocolIPv4),
+		iptV6: utiliptables.New(utiliptables.ProtocolIPv6),
 
 		dmux: connection.NewDstMuxedConn(),
 	}, nil