runtime: consolidate types definition

We do not need the vc types translation for network data structures.
Just use the protocol buffer definitions.

Fixes: #415
Signed-off-by: Peng Tao <bergwolf@hyper.sh>

src/runtime/virtcontainers/utils/utils.go

@@ -13,6 +13,10 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+
+	"github.com/vishvananda/netlink"
+
+	pbTypes "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/agent/protocols"
 )
 
 const cpBinaryName = "cp"
@@ -318,3 +322,14 @@ func (p *ProgramLogger) StartLogger(output io.ReadCloser) error {
 func (p ProgramLogger) String() string {
 	return p.cmd.Path
 }
+
+func ConvertNetlinkFamily(netlinkFamily int32) pbTypes.IPFamily {
+	switch netlinkFamily {
+	case netlink.FAMILY_V6:
+		return pbTypes.IPFamily_v6
+	case netlink.FAMILY_V4:
+		fallthrough
+	default:
+		return pbTypes.IPFamily_v4
+	}
+}