package wireguard import ( "context" "net" "net/netip" "os" "github.com/sagernet/sing-box/adapter" "github.com/sagernet/sing-box/common/dialer" "github.com/sagernet/sing-box/option" "github.com/sagernet/sing-tun" "github.com/sagernet/sing/common" M "github.com/sagernet/sing/common/metadata" N "github.com/sagernet/sing/common/network" wgTun "github.com/sagernet/wireguard-go/tun" ) var _ Device = (*SystemDevice)(nil) type SystemDevice struct { dialer N.Dialer device tun.Tun name string mtu int events chan wgTun.Event addr4 netip.Addr addr6 netip.Addr } func NewSystemDevice(router adapter.Router, interfaceName string, localPrefixes []netip.Prefix, mtu uint32) (*SystemDevice, error) { var inet4Addresses []netip.Prefix var inet6Addresses []netip.Prefix for _, prefixes := range localPrefixes { if prefixes.Addr().Is4() { inet4Addresses = append(inet4Addresses, prefixes) } else { inet6Addresses = append(inet6Addresses, prefixes) } } if interfaceName == "" { interfaceName = tun.CalculateInterfaceName("wg") } tunInterface, err := tun.New(tun.Options{ Name: interfaceName, Inet4Address: inet4Addresses, Inet6Address: inet6Addresses, MTU: mtu, }) if err != nil { return nil, err } var inet4Address netip.Addr var inet6Address netip.Addr if len(inet4Addresses) > 0 { inet4Address = inet4Addresses[0].Addr() } if len(inet6Addresses) > 0 { inet6Address = inet6Addresses[0].Addr() } return &SystemDevice{ dialer: common.Must1(dialer.NewDefault(router, option.DialerOptions{ BindInterface: interfaceName, })), device: tunInterface, name: interfaceName, mtu: int(mtu), events: make(chan wgTun.Event), addr4: inet4Address, addr6: inet6Address, }, nil } func (w *SystemDevice) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) { return w.dialer.DialContext(ctx, network, destination) } func (w *SystemDevice) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) { return w.dialer.ListenPacket(ctx, destination) } func (w *SystemDevice) Inet4Address() netip.Addr { return w.addr4 } func (w *SystemDevice) Inet6Address() netip.Addr { return w.addr6 } func (w *SystemDevice) Start() error { w.events <- wgTun.EventUp return nil } func (w *SystemDevice) File() *os.File { return nil } func (w *SystemDevice) Read(bufs [][]byte, sizes []int, offset int) (count int, err error) { sizes[0], err = w.device.Read(bufs[0][offset-tun.PacketOffset:]) if err == nil { count = 1 } return } func (w *SystemDevice) Write(bufs [][]byte, offset int) (count int, err error) { for _, b := range bufs { _, err = w.device.Write(b[offset:]) if err != nil { return } count++ } return } func (w *SystemDevice) Flush() error { return nil } func (w *SystemDevice) MTU() (int, error) { return w.mtu, nil } func (w *SystemDevice) Name() (string, error) { return w.name, nil } func (w *SystemDevice) Events() <-chan wgTun.Event { return w.events } func (w *SystemDevice) Close() error { return w.device.Close() } func (w *SystemDevice) BatchSize() int { return 1 }