Add dns client

outbound/dialer/default.go

@@ -20,7 +20,7 @@ type defaultDialer struct {
 	net.ListenConfig
 }
 
-func newDefault(options option.DialerOptions) N.Dialer {
+func NewDefault(options option.DialerOptions) N.Dialer {
 	var dialer net.Dialer
 	var listener net.ListenConfig
 	if options.BindInterface != "" {

outbound/dialer/detour.go

@@ -10,27 +10,31 @@ import (
 	N "github.com/sagernet/sing/common/network"
 
 	"github.com/sagernet/sing-box/adapter"
-	"github.com/sagernet/sing-box/option"
 )
 
 type detourDialer struct {
 	router   adapter.Router
-	options  option.DialerOptions
+	detour   string
 	dialer   N.Dialer
 	initOnce sync.Once
 	initErr  error
 }
 
-func newDetour(router adapter.Router, options option.DialerOptions) N.Dialer {
-	return &detourDialer{router: router, options: options}
+func NewDetour(router adapter.Router, detour string) N.Dialer {
+	return &detourDialer{router: router, detour: detour}
+}
+
+func (d *detourDialer) Start() error {
+	_, err := d.Dialer()
+	return err
 }
 
 func (d *detourDialer) Dialer() (N.Dialer, error) {
 	d.initOnce.Do(func() {
 		var loaded bool
-		d.dialer, loaded = d.router.Outbound(d.options.Detour)
+		d.dialer, loaded = d.router.Outbound(d.detour)
 		if !loaded {
-			d.initErr = E.New("outbound detour not found: ", d.options.Detour)
+			d.initErr = E.New("outbound detour not found: ", d.detour)
 		}
 	})
 	return d.dialer, d.initErr

outbound/dialer/dialer.go

@@ -11,12 +11,12 @@ import (
 func New(router adapter.Router, options option.DialerOptions) N.Dialer {
 	var dialer N.Dialer
 	if options.Detour == "" {
-		dialer = newDefault(options)
+		dialer = NewDefault(options)
 	} else {
-		dialer = newDetour(router, options)
+		dialer = NewDetour(router, options.Detour)
 	}
 	if options.OverrideOptions.IsValid() {
-		dialer = newOverride(dialer, common.PtrValueOrDefault(options.OverrideOptions))
+		dialer = NewOverride(dialer, common.PtrValueOrDefault(options.OverrideOptions))
 	}
 	return dialer
 }

outbound/dialer/override.go

@@ -22,7 +22,7 @@ type overrideDialer struct {
 	uotEnabled bool
 }
 
-func newOverride(upstream N.Dialer, options option.OverrideStreamOptions) N.Dialer {
+func NewOverride(upstream N.Dialer, options option.OverrideStreamOptions) N.Dialer {
 	return &overrideDialer{
 		upstream,
 		options.TLS,

outbound/dialer/protect.go

@@ -5,7 +5,6 @@ package dialer
 import (
 	"syscall"
 
-	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
 )
@@ -42,6 +41,6 @@ func ProtectPath(protectPath string) control.Func {
 		err := conn.Control(func(fd uintptr) {
 			innerErr = sendAncillaryFileDescriptors(protectPath, []int{int(fd)})
 		})
-		return common.AnyError(innerErr, err)
+		return E.Errors(innerErr, err)
 	}
 }