Update platform defaults, handling of 'auto' on Linux/Darwin

src/defaults/defaults_freebsd.go

@@ -20,6 +20,6 @@ func GetDefaults() platformDefaultParameters {
 		// TUN/TAP
 		MaximumIfMTU:  32767,
 		DefaultIfMTU:  32767,
-		DefaultIfName: "/dev/tap0",
+		DefaultIfName: "/dev/tun0",
 	}
 }

src/defaults/defaults_netbsd.go

@@ -1,25 +0,0 @@
-// +build netbsd
-
-package defaults
-
-// Sane defaults for the BSD platforms. The "default" options may be
-// may be replaced by the running configuration.
-func GetDefaults() platformDefaultParameters {
-	return platformDefaultParameters{
-		// Admin
-		DefaultAdminListen: "unix:///var/run/yggdrasil.sock",
-
-		// Configuration (used for yggdrasilctl)
-		DefaultConfigFile: "/etc/yggdrasil.conf",
-
-		// Multicast interfaces
-		DefaultMulticastInterfaces: []string{
-			".*",
-		},
-
-		// TUN/TAP
-		MaximumIfMTU:  9000,
-		DefaultIfMTU:  9000,
-		DefaultIfName: "/dev/tun0",
-	}
-}

src/defaults/defaults_other.go

@@ -1,4 +1,4 @@
-// +build !linux,!darwin,!windows,!openbsd,!freebsd,!netbsd
+// +build !linux,!darwin,!windows,!openbsd,!freebsd
 
 package defaults
 

src/defaults/defaults_windows.go

@@ -20,6 +20,6 @@ func GetDefaults() platformDefaultParameters {
 		// TUN/TAP
 		MaximumIfMTU:  65535,
 		DefaultIfMTU:  65535,
-		DefaultIfName: "auto",
+		DefaultIfName: "Yggdrasil",
 	}
 }

src/tuntap/tun_darwin.go

@@ -17,6 +17,9 @@ import (
 
 // Configures the "utun" adapter with the correct IPv6 address and MTU.
 func (tun *TunAdapter) setup(ifname string, addr string, mtu int) error {
+	if ifname == "auto" {
+		ifname = "utun"
+	}
 	iface, err := wgtun.CreateTUN(ifname, mtu)
 	if err != nil {
 		panic(err)

src/tuntap/tun_linux.go

@@ -11,6 +11,9 @@ import (
 
 // Configures the TUN adapter with the correct IPv6 address and MTU.
 func (tun *TunAdapter) setup(ifname string, addr string, mtu int) error {
+	if ifname == "auto" {
+		ifname = "\000"
+	}
 	iface, err := wgtun.CreateTUN(ifname, mtu)
 	if err != nil {
 		panic(err)