monitor: Do not select disconnected interface

This reverts commit 5d9bd04495.

golang.org/x/net@v0.26.0 requires golang.org/x/crypto@24.0 requires go1.19

monitor_shared.go

@@ -42,6 +42,7 @@ type defaultInterfaceMonitor struct {
 	defaultInterfaceName  string
 	defaultInterfaceIndex int
 	androidVPNEnabled     bool
+	noRoute               bool
 	networkMonitor        NetworkUpdateMonitor
 	checkUpdateTimer      *time.Timer
 	element               *list.Element[NetworkUpdateCallback]
@@ -86,11 +87,16 @@ func (m *defaultInterfaceMonitor) postCheckUpdate() {
 	}
 	err = m.checkUpdate()
 	if errors.Is(err, ErrNoRoute) {
-		m.defaultInterfaceName = ""
-		m.defaultInterfaceIndex = -1
-		m.emit(EventNoRoute)
+		if !m.noRoute {
+			m.noRoute = true
+			m.defaultInterfaceName = ""
+			m.defaultInterfaceIndex = -1
+			m.emit(EventNoRoute)
+		}
 	} else if err != nil {
 		m.logger.Error("check interface: ", err)
+	} else {
+		m.noRoute = false
 	}
 }
 

monitor_windows.go

@@ -78,12 +78,16 @@ func (m *defaultInterfaceMonitor) checkUpdate() error {
 			continue
 		}
 
+		if ifrow.Type == winipcfg.IfTypePropVirtual || ifrow.Type == winipcfg.IfTypeSoftwareLoopback {
+			continue
+		}
+
 		iface, err := row.InterfaceLUID.IPInterface(windows.AF_INET)
 		if err != nil {
 			continue
 		}
 
-		if ifrow.Type == winipcfg.IfTypePropVirtual || ifrow.Type == winipcfg.IfTypeSoftwareLoopback {
+		if !iface.Connected {
 			continue
 		}
 

tun_rules.go

@@ -109,9 +109,11 @@ func (o *Options) BuildAutoRouteRanges(underNetworkExtension bool) ([]netip.Pref
 		var inet4Ranges []netip.Prefix
 		if len(o.Inet4RouteAddress) > 0 {
 			inet4Ranges = o.Inet4RouteAddress
-			for _, address := range o.Inet4Address {
-				if address.Bits() < 32 {
-					inet4Ranges = append(inet4Ranges, netipx.RangeOfPrefix(address).Prefixes()...)
+			if runtime.GOOS == "darwin" {
+				for _, address := range o.Inet4Address {
+					if address.Bits() < 32 {
+						inet4Ranges = append(inet4Ranges, address.Masked())
+					}
 				}
 			}
 		} else if autoRouteUseSubRanges && !underNetworkExtension {
@@ -149,9 +151,11 @@ func (o *Options) BuildAutoRouteRanges(underNetworkExtension bool) ([]netip.Pref
 		var inet6Ranges []netip.Prefix
 		if len(o.Inet6RouteAddress) > 0 {
 			inet6Ranges = o.Inet6RouteAddress
-			for _, address := range o.Inet6Address {
-				if address.Bits() < 32 {
-					inet6Ranges = append(inet6Ranges, netipx.RangeOfPrefix(address).Prefixes()...)
+			if runtime.GOOS == "darwin" {
+				for _, address := range o.Inet6Address {
+					if address.Bits() < 32 {
+						inet6Ranges = append(inet6Ranges, address.Masked())
+					}
 				}
 			}
 		} else if autoRouteUseSubRanges && !underNetworkExtension {