Separate VmnetNetwork into pkg/vmnet

Change `NewVmnetNetworkDeviceAttachment()` to take `unsafe.Pointer` instead of `*VmnetNetwork`

Signed-off-by: Norio Nomura <[email protected]>

pkg/vmnet: Re-order functions in *.{h,m}

Signed-off-by: Norio Nomura <[email protected]>

pkg/vmnet: Replace `runtime.SetFinalizer` to `runtime.AddCleanup`

Signed-off-by: Norio Nomura <[email protected]>

Author: norio-nomura

network.go

@@ -13,6 +13,7 @@ import (
 	"net"
 	"os"
 	"syscall"
+	"unsafe"
 
 	"github.com/Code-Hex/vz/v3/internal/objc"
 )
@@ -279,11 +280,8 @@ func (*VmnetNetworkDeviceAttachment) String() string {
 	return "VmnetNetworkDeviceAttachment"
 }
 
-func (v *VmnetNetworkDeviceAttachment) Network() *VmnetNetwork {
-	network := C.VZVmnetNetworkDeviceAttachment_network(objc.Ptr(v))
-	return &VmnetNetwork{
-		pointer: objc.NewPointer(network),
-	}
+func (v *VmnetNetworkDeviceAttachment) Network() unsafe.Pointer {
+	return C.VZVmnetNetworkDeviceAttachment_network(objc.Ptr(v))
 }
 
 var _ NetworkDeviceAttachment = (*VmnetNetworkDeviceAttachment)(nil)
@@ -292,16 +290,14 @@ var _ NetworkDeviceAttachment = (*VmnetNetworkDeviceAttachment)(nil)
 //
 // This is only supported on macOS 26 and newer, error will
 // be returned on older versions.
-func NewVmnetNetworkDeviceAttachment(network *VmnetNetwork) (*VmnetNetworkDeviceAttachment, error) {
+func NewVmnetNetworkDeviceAttachment(network unsafe.Pointer) (*VmnetNetworkDeviceAttachment, error) {
 	if err := macOSAvailable(26); err != nil {
 		return nil, err
 	}
 
 	attachment := &VmnetNetworkDeviceAttachment{
 		pointer: objc.NewPointer(
-			C.newVZVmnetNetworkDeviceAttachment(
-				objc.Ptr(network),
-			),
+			C.newVZVmnetNetworkDeviceAttachment(network),
 		),
 	}
 	objc.SetFinalizer(attachment, func(self *VmnetNetworkDeviceAttachment) {
@@ -423,10 +419,6 @@ func (m *MACAddress) String() string {
 	return cstring.String()
 }
 
-func (m *MACAddress) ethernetAddress() C.ether_addr_t {
-	return C.getVZMACAddressEthernetAddress(objc.Ptr(m))
-}
-
 func (m *MACAddress) HardwareAddr() net.HardwareAddr {
 	hw, _ := net.ParseMAC(m.String())
 	return hw