update params

params_darwin.go

@@ -17,14 +17,23 @@ const (
 // Currently it is not possible to set the interface name in macOS.
 type PlatformSpecificParams struct {
 	// Name is the name for the interface to be used.
-	//
 	// For TunTapOSXDriver, it should be something like "tap0".
 	// For SystemDriver, the name should match `utun[0-9]+`, e.g. utun233
 	Name string
-
 	// Driver should be set if an alternative driver is desired
 	// e.g. TunTapOSXDriver
 	Driver MacOSDriverProvider
+	// Network is required when creating a TUN interface. The library will call
+	// net.ParseCIDR() to parse this string into LocalIP, RemoteNetaddr,
+	// RemoteNetmask. The underlying driver will need those to generate ARP
+	// response to Windows kernel, to emulate an TUN interface.
+	// Please note that it cannot perceive the IP changes caused by DHCP, user
+	// configuration to the adapter and etc,. If IP changed, please reconfigure
+	// the adapter using syscall, just like openDev().
+	// For detail, please refer
+	// https://github.com/OpenVPN/tap-windows6/blob/master/src/device.c#L431
+	// and https://github.com/songgao/water/pull/13#issuecomment-270341777
+	Network string
 }
 
 func defaultPlatformSpecificParams() PlatformSpecificParams {

params_linux.go

@@ -38,6 +38,17 @@ type PlatformSpecificParams struct {
 	// uses multiple file descriptors (queues) to parallelize packets sending
 	// or receiving.
 	MultiQueue bool
+	// Network is required when creating a TUN interface. The library will call
+	// net.ParseCIDR() to parse this string into LocalIP, RemoteNetaddr,
+	// RemoteNetmask. The underlying driver will need those to generate ARP
+	// response to Windows kernel, to emulate an TUN interface.
+	// Please note that it cannot perceive the IP changes caused by DHCP, user
+	// configuration to the adapter and etc,. If IP changed, please reconfigure
+	// the adapter using syscall, just like openDev().
+	// For detail, please refer
+	// https://github.com/OpenVPN/tap-windows6/blob/master/src/device.c#L431
+	// and https://github.com/songgao/water/pull/13#issuecomment-270341777
+	Network string
 }
 
 func defaultPlatformSpecificParams() PlatformSpecificParams {

params_windows.go

@@ -3,7 +3,7 @@ package water
 // PlatformSpecificParams defines parameters in Config that are specific to
 // Windows. A zero-value of such type is valid.
 type PlatformSpecificParams struct {
-	InterfaceName string
+	Name string
 	// Network is required when creating a TUN interface. The library will call
 	// net.ParseCIDR() to parse this string into LocalIP, RemoteNetaddr,
 	// RemoteNetmask. The underlying driver will need those to generate ARP
@@ -19,7 +19,7 @@ type PlatformSpecificParams struct {
 
 func defaultPlatformSpecificParams() PlatformSpecificParams {
 	return PlatformSpecificParams{
-		InterfaceName: "wintun",
-		Network:       "172.16.1.10/24",
+		Name:    "wintun",
+		Network: "172.16.1.10/24",
 	}
 }

syscalls_windows.go

@@ -31,7 +31,7 @@ func openDev(config Config) (ifce *Interface, err error) {
 		0xFFFF,
 		[8]byte{0xFF, 0xe9, 0x76, 0xe5, 0x8c, 0x74, 0x06, 0x3e},
 	}
-	dev, err := tun.CreateTUNWithRequestedGUID(config.PlatformSpecificParams.InterfaceName, id, 0)
+	dev, err := tun.CreateTUNWithRequestedGUID(config.PlatformSpecificParams.Name, id, 0)
 	if err != nil {
 		return nil, err
 	}