DNS config

go.mod

@@ -12,6 +12,8 @@ require (
 	github.com/gorilla/handlers v1.4.2 // indirect
 	github.com/gorilla/mux v1.7.3
 	github.com/kylelemons/godebug v1.1.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/pkg/errors v0.8.1
 	github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
 	github.com/prometheus/client_golang v1.2.1

internal/config/config.go

@@ -63,6 +63,9 @@ type AppConfig struct {
 		ExternalAddress string `yaml:"externalAddress`
 		// The WireGuard ListenPort
 		Port int `yaml:"port"`
+		// The DNS servers that VPN clients will be directed
+		// to use.
+		DNS []string `yaml:"dns"`
 	} `yaml:"wireguard"`
 	VPN struct {
 		// CIDR configures a network address space

internal/services/wireguard.go

@@ -17,11 +17,12 @@ type WireGuard struct {
 	iface           string
 	externalAddress string
 	port            int
+	dns             []string
 	publicKey       wgtypes.Key
 	lock            sync.Mutex
 }
 
-func NewWireGuard(iface string, privateKey string, port int, externalAddress string) (*WireGuard, error) {
+func NewWireGuard(iface string, privateKey string, port int, externalAddress string, dns []string) (*WireGuard, error) {
 	// wgctrl.New() will search for a kernel implementation
 	// of wireguard, then user implementations
 	// user implementations are found in /var/run/wireguard/<iface>.sock
@@ -142,7 +143,7 @@ func (s *WireGuard) Endpoint() string {
 }
 
 func (s *WireGuard) DNS() string {
-	return "1.1.1.1, 8.8.8.8" // TODO: dns stuff
+	return strings.Join(s.dns, ", ")
 }
 
 func (s *WireGuard) Device() (*wgtypes.Device, error) {

main.go

@@ -43,6 +43,7 @@ func main() {
 		conf.WireGuard.PrivateKey,
 		conf.WireGuard.Port,
 		conf.WireGuard.ExternalAddress,
+		conf.WireGuard.DNS,
 	)
 	if err != nil {
 		logrus.Fatal(errors.Wrap(err, "failed to create wgserver"))