From 7d00206f4bde6de34dfd84ac4d9e092a98ce57de Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Fri, 22 Nov 2019 20:07:08 +0000
Subject: [PATCH] Update platform defaults, handling of 'auto' on Linux/Darwin

---
 src/defaults/defaults_freebsd.go |  2 +-
 src/defaults/defaults_netbsd.go  | 25 -------------------------
 src/defaults/defaults_other.go   |  2 +-
 src/defaults/defaults_windows.go |  2 +-
 src/tuntap/tun_darwin.go         |  3 +++
 src/tuntap/tun_linux.go          |  3 +++
 6 files changed, 9 insertions(+), 28 deletions(-)
 delete mode 100644 src/defaults/defaults_netbsd.go

diff --git a/src/defaults/defaults_freebsd.go b/src/defaults/defaults_freebsd.go
index d7dc43b..b08d80d 100644
--- a/src/defaults/defaults_freebsd.go
+++ b/src/defaults/defaults_freebsd.go
@@ -20,6 +20,6 @@ func GetDefaults() platformDefaultParameters {
 		// TUN/TAP
 		MaximumIfMTU:  32767,
 		DefaultIfMTU:  32767,
-		DefaultIfName: "/dev/tap0",
+		DefaultIfName: "/dev/tun0",
 	}
 }
diff --git a/src/defaults/defaults_netbsd.go b/src/defaults/defaults_netbsd.go
deleted file mode 100644
index bc9d7a3..0000000
--- a/src/defaults/defaults_netbsd.go
+++ /dev/null
@@ -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",
-	}
-}
diff --git a/src/defaults/defaults_other.go b/src/defaults/defaults_other.go
index 763a7f8..3b03553 100644
--- a/src/defaults/defaults_other.go
+++ b/src/defaults/defaults_other.go
@@ -1,4 +1,4 @@
-// +build !linux,!darwin,!windows,!openbsd,!freebsd,!netbsd
+// +build !linux,!darwin,!windows,!openbsd,!freebsd
 
 package defaults
 
diff --git a/src/defaults/defaults_windows.go b/src/defaults/defaults_windows.go
index ade833d..305a2ff 100644
--- a/src/defaults/defaults_windows.go
+++ b/src/defaults/defaults_windows.go
@@ -20,6 +20,6 @@ func GetDefaults() platformDefaultParameters {
 		// TUN/TAP
 		MaximumIfMTU:  65535,
 		DefaultIfMTU:  65535,
-		DefaultIfName: "auto",
+		DefaultIfName: "Yggdrasil",
 	}
 }
diff --git a/src/tuntap/tun_darwin.go b/src/tuntap/tun_darwin.go
index c9b8bce..cf2fbfb 100644
--- a/src/tuntap/tun_darwin.go
+++ b/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)
diff --git a/src/tuntap/tun_linux.go b/src/tuntap/tun_linux.go
index 7935e7c..4206b26 100644
--- a/src/tuntap/tun_linux.go
+++ b/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)