Refactoring: move tuntap and icmpv6 into separate package

src/tuntap/tun_other.go

@@ -0,0 +1,33 @@
+// +build !linux,!darwin,!windows,!openbsd,!freebsd,!netbsd,!mobile
+
+package tuntap
+
+import water "github.com/yggdrasil-network/water"
+
+// This is to catch unsupported platforms
+// If your platform supports tun devices, you could try configuring it manually
+
+// Creates the TUN/TAP adapter, if supported by the Water library. Note that
+// no guarantees are made at this point on an unsupported platform.
+func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
+	var config water.Config
+	if iftapmode {
+		config = water.Config{DeviceType: water.TAP}
+	} else {
+		config = water.Config{DeviceType: water.TUN}
+	}
+	iface, err := water.New(config)
+	if err != nil {
+		panic(err)
+	}
+	tun.iface = iface
+	tun.mtu = getSupportedMTU(mtu)
+	return tun.setupAddress(addr)
+}
+
+// We don't know how to set the IPv6 address on an unknown platform, therefore
+// write about it to stdout and don't try to do anything further.
+func (tun *TunAdapter) setupAddress(addr string) error {
+	tun.core.log.Warnln("Platform not supported, you must set the address of", tun.iface.Name(), "to", addr)
+	return nil
+}