package nebula import ( "fmt" "net" "os/exec" "github.com/songgao/water" ) type Tun struct { Device string Cidr *net.IPNet MTU int *water.Interface } func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, txQueueLen int) (ifce *Tun, err error) { if len(routes) > 0 { return nil, fmt.Errorf("Route MTU not supported in Windows") } // NOTE: You cannot set the deviceName under Windows, so you must check tun.Device after calling .Activate() return &Tun{ Cidr: cidr, MTU: defaultMTU, }, nil } func (c *Tun) Activate() error { var err error c.Interface, err = water.New(water.Config{ DeviceType: water.TUN, PlatformSpecificParams: water.PlatformSpecificParams{ ComponentID: "tap0901", Network: c.Cidr.String(), }, }) if err != nil { return fmt.Errorf("Activate failed: %v", err) } c.Device = c.Interface.Name() // TODO use syscalls instead of exec.Command err = exec.Command( "netsh", "interface", "ipv4", "set", "address", fmt.Sprintf("name=%s", c.Device), "source=static", fmt.Sprintf("addr=%s", c.Cidr.IP), fmt.Sprintf("mask=%s", net.IP(c.Cidr.Mask)), "gateway=none", ).Run() if err != nil { return fmt.Errorf("failed to run 'netsh' to set address: %s", err) } err = exec.Command( "netsh", "interface", "ipv4", "set", "interface", c.Device, fmt.Sprintf("mtu=%d", c.MTU), ).Run() if err != nil { return fmt.Errorf("failed to run 'netsh' to set MTU: %s", err) } return nil } func (c *Tun) WriteRaw(b []byte) error { _, err := c.Write(b) return err }