type NetlinkDependencies interface {
	AddInpodMarkIPRule(cfg *Config) error
	DelInpodMarkIPRule(cfg *Config) error
	AddLoopbackRoutes(cfg *Config) error
	DelLoopbackRoutes(cfg *Config) error
}

func RealNlDeps() NetlinkDependencies {
	return &realDeps{}
}

type realDeps struct{}

func (r *realDeps) AddInpodMarkIPRule(cfg *Config) error {
	return AddInpodMarkIPRule(cfg)
}

// See the License for the specific language governing permissions and
// limitations under the License.
package iptables

import (
	"errors"
)

func AddInpodMarkIPRule(cfg *Config) error {
	return errors.New("not implemented on this platform")
}

func DelInpodMarkIPRule(cfg *Config) error {
	return errors.New("not implemented on this platform")
}

package iptables

import (
	"errors"
	"fmt"
	"net"
	"os"
	"strings"

	"github.com/vishvananda/netlink"
	"golang.org/x/sys/unix"

	"istio.io/istio/pkg/ptr"
)

func AddInpodMarkIPRule(cfg *Config) error {
	err := forEachInpodMarkIPRule(cfg, netlink.RuleAdd)
	if errors.Is(err, unix.EEXIST) {
		log.Debugf("Ignoring exists error adding inpod mark ip rule: %v", err)
		return nil
	}
	return err
}

	DelInpodMarkIPRuleCnt atomic.Int32
	AddLoopbackRoutesCnt  atomic.Int32
	DelLoopbackRoutesCnt  atomic.Int32
}

var _ iptables.NetlinkDependencies = &fakeIptablesDeps{}

func (r *fakeIptablesDeps) AddInpodMarkIPRule(cfg *iptables.Config) error {
	r.AddInpodMarkIPRuleCnt.Add(1)
	return nil
}

func (r *fakeIptablesDeps) DelInpodMarkIPRule(cfg *iptables.Config) error {
	r.DelInpodMarkIPRuleCnt.Add(1)
	return nil
}

}

func (cfg *IptablesConfigurator) delLoopbackRoute() error {
	return cfg.nlDeps.DelLoopbackRoutes(cfg.cfg)
}

func (cfg *IptablesConfigurator) addInpodMarkIPRule() error {
	return cfg.nlDeps.AddInpodMarkIPRule(cfg.cfg)
}

func (cfg *IptablesConfigurator) delInpodMarkIPRule() error {
	return cfg.nlDeps.DelInpodMarkIPRule(cfg.cfg)
}