chore: add recvmsgx and sendmsgx config to tun

Only for advanced users, enabling `recvmsgx` under darwin can improve performance, but enabling `sendmsgx` may cause unknown problems, please use with caution.

config/config.go

@@ -296,6 +296,10 @@ type RawTun struct {
 	Inet6RouteAddress        []netip.Prefix `yaml:"inet6-route-address" json:"inet6-route-address,omitempty"`
 	Inet4RouteExcludeAddress []netip.Prefix `yaml:"inet4-route-exclude-address" json:"inet4-route-exclude-address,omitempty"`
 	Inet6RouteExcludeAddress []netip.Prefix `yaml:"inet6-route-exclude-address" json:"inet6-route-exclude-address,omitempty"`
+
+	// darwin special config
+	RecvMsgX bool `yaml:"recvmsgx" json:"recvmsgx,omitempty"`
+	SendMsgX bool `yaml:"sendmsgx" json:"sendmsgx,omitempty"`
 }
 
 type RawTuicServer struct {
@@ -513,6 +517,8 @@ func DefaultRawConfig() *RawConfig {
 			AutoRoute:           true,
 			AutoDetectInterface: true,
 			Inet6Address:        []netip.Prefix{netip.MustParsePrefix("fdfe:dcba:9876::1/126")},
+			RecvMsgX:            true,
+			SendMsgX:            false, // In the current implementation, if enabled, the kernel may freeze during multi-thread downloads, so it is disabled by default.
 		},
 		TuicServer: RawTuicServer{
 			Enable:                false,
@@ -1554,6 +1560,9 @@ func parseTun(rawTun RawTun, general *General) error {
 		Inet6RouteAddress:        rawTun.Inet6RouteAddress,
 		Inet4RouteExcludeAddress: rawTun.Inet4RouteExcludeAddress,
 		Inet6RouteExcludeAddress: rawTun.Inet6RouteExcludeAddress,
+
+		RecvMsgX: rawTun.RecvMsgX,
+		SendMsgX: rawTun.SendMsgX,
 	}
 
 	return nil

hub/route/configs.go

@@ -100,6 +100,10 @@ type tunSchema struct {
 	Inet6RouteAddress        *[]netip.Prefix `yaml:"inet6-route-address" json:"inet6-route-address,omitempty"`
 	Inet4RouteExcludeAddress *[]netip.Prefix `yaml:"inet4-route-exclude-address" json:"inet4-route-exclude-address,omitempty"`
 	Inet6RouteExcludeAddress *[]netip.Prefix `yaml:"inet6-route-exclude-address" json:"inet6-route-exclude-address,omitempty"`
+
+	// darwin special config
+	RecvMsgX *bool `yaml:"recvmsgx" json:"recvmsgx,omitempty"`
+	SendMsgX *bool `yaml:"sendmsgx" json:"sendmsgx,omitempty"`
 }
 
 type tuicServerSchema struct {
@@ -243,6 +247,12 @@ func pointerOrDefaultTun(p *tunSchema, def LC.Tun) LC.Tun {
 		if p.FileDescriptor != nil {
 			def.FileDescriptor = *p.FileDescriptor
 		}
+		if p.RecvMsgX != nil {
+			def.RecvMsgX = *p.RecvMsgX
+		}
+		if p.SendMsgX != nil {
+			def.SendMsgX = *p.SendMsgX
+		}
 	}
 	return def
 }

listener/config/tun.go

@@ -54,6 +54,10 @@ type Tun struct {
 	Inet6RouteAddress        []netip.Prefix `yaml:"inet6-route-address" json:"inet6-route-address,omitempty"`
 	Inet4RouteExcludeAddress []netip.Prefix `yaml:"inet4-route-exclude-address" json:"inet4-route-exclude-address,omitempty"`
 	Inet6RouteExcludeAddress []netip.Prefix `yaml:"inet6-route-exclude-address" json:"inet6-route-exclude-address,omitempty"`
+
+	// darwin special config
+	RecvMsgX bool `yaml:"recvmsgx" json:"recvmsgx,omitempty"`
+	SendMsgX bool `yaml:"sendmsgx" json:"sendmsgx,omitempty"`
 }
 
 func (t *Tun) Sort() {
@@ -199,5 +203,12 @@ func (t *Tun) Equal(other Tun) bool {
 		return false
 	}
 
+	if t.RecvMsgX != other.RecvMsgX {
+		return false
+	}
+	if t.SendMsgX != other.SendMsgX {
+		return false
+	}
+
 	return true
 }

listener/inbound/tun.go

@@ -55,6 +55,10 @@ type TunOption struct {
 	Inet6RouteAddress        []netip.Prefix `inbound:"inet6-route-address,omitempty"`
 	Inet4RouteExcludeAddress []netip.Prefix `inbound:"inet4-route-exclude-address,omitempty"`
 	Inet6RouteExcludeAddress []netip.Prefix `inbound:"inet6-route-exclude-address,omitempty"`
+
+	// darwin special config
+	RecvMsgX bool `inbound:"recvmsgx,omitempty"`
+	SendMsgX bool `inbound:"sendmsgx,omitempty"`
 }
 
 var _ encoding.TextUnmarshaler = (*netip.Addr)(nil)   // ensure netip.Addr can decode direct by structure package
@@ -124,6 +128,9 @@ func NewTun(options *TunOption) (*Tun, error) {
 			Inet6RouteAddress:        options.Inet6RouteAddress,
 			Inet4RouteExcludeAddress: options.Inet4RouteExcludeAddress,
 			Inet6RouteExcludeAddress: options.Inet6RouteExcludeAddress,
+
+			RecvMsgX: options.RecvMsgX,
+			SendMsgX: options.SendMsgX,
 		},
 	}, nil
 }

listener/sing_tun/server.go

@@ -365,6 +365,8 @@ func New(options LC.Tun, tunnel C.Tunnel, additions ...inbound.Addition) (l *Lis
 		ExcludePackage:           options.ExcludePackage,
 		FileDescriptor:           options.FileDescriptor,
 		InterfaceMonitor:         defaultInterfaceMonitor,
+		EXP_RecvMsgX:             options.RecvMsgX,
+		EXP_SendMsgX:             options.SendMsgX,
 	}
 
 	if options.AutoRedirect {