fix tun for windows

lower/config_unix.go

@@ -0,0 +1,8 @@
+//go:build !windows
+// +build !windows
+
+package lower
+
+import "github.com/songgao/water"
+
+var tuncfg = water.Config{DeviceType: water.TUN}

lower/config_windows.go

@@ -0,0 +1,15 @@
+//go:build windows
+// +build windows
+
+package lower
+
+import "github.com/songgao/water"
+
+var tuncfg = water.Config{
+	DeviceType: water.TUN,
+	PlatformSpecificParams: water.PlatformSpecificParams{
+		ComponentID:   "root\\tap0901",
+		InterfaceName: "OpenVPN TAP-Windows6",
+		Network:       "192.168.233.0/24",
+	},
+}

lower/nic.go

@@ -23,7 +23,7 @@ type NIC struct {
 // NewNIC 新建 TUN 网络接口卡
 // 网卡地址为 ip, 所属子网为 subnet
 func NewNIC(ip, subnet string) (n *NIC) {
-	ifce, err := water.New(water.Config{DeviceType: water.TUN})
+	ifce, err := water.New(tuncfg)
 	if err != nil {
 		panic(err)
 	}

lower/tun_windows.go

@@ -3,16 +3,22 @@
 
 package lower
 
+import "net"
+
 func (n *NIC) prepare() {
-	execute("/sbin/ip", "link", "set", "dev", ifcename, "mtu", "1500")
-	execute("/sbin/ip", "addr", "add", ip, "dev", ifcename)
-	execute("/sbin/ip", "route", "add", subnet, "dev", ifcename)
+	_, ipn, err := net.ParseCIDR(n.subnet)
+	if err != nil {
+		panic(err)
+	}
+	execute("cmd", "/c", "netsh interface ip set address name=\""+n.ifce.Name()+"\" source=static addr=\""+n.ip+"\" mask=\""+(net.IP)(ipn.Mask).String()+"\" gateway=none")
 }
 
 func (n *NIC) Up() {
-	execute("/sbin/ip", "link", "set", "dev", ifcename, "up")
+	// execute("netsh", "interface", "set", "interface", n.ifce.Name(), "enabled")
+	// don't need to bring up the device by hand
 }
 
 func (n *NIC) Down() {
-	execute("/sbin/ip", "link", "set", "dev", ifcename, "down")
+	// execute("netsh", "interface", "set", "interface", n.ifce.Name(), "disabled")
+	// don't need to bring up the device by hand
 }