Merge branch 'main' into feature/relay-integration

client/cmd/down.go

@@ -26,7 +26,7 @@ var downCmd = &cobra.Command{
 			return err
 		}
 
-		ctx, cancel := context.WithTimeout(context.Background(), time.Second*3)
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second*7)
 		defer cancel()
 
 		conn, err := DialClientGRPCServer(ctx, daemonAddr)

client/cmd/root.go

@@ -121,7 +121,7 @@ func init() {
 	rootCmd.PersistentFlags().StringVarP(&serviceName, "service", "s", defaultServiceName, "Netbird system service name")
 	rootCmd.PersistentFlags().StringVarP(&configPath, "config", "c", defaultConfigPath, "Netbird config file location")
 	rootCmd.PersistentFlags().StringVarP(&logLevel, "log-level", "l", "info", "sets Netbird log level")
-	rootCmd.PersistentFlags().StringVar(&logFile, "log-file", defaultLogFile, "sets Netbird log path. If console is specified the log will be output to stdout")
+	rootCmd.PersistentFlags().StringVar(&logFile, "log-file", defaultLogFile, "sets Netbird log path. If console is specified the log will be output to stdout. If syslog is specified the log will be sent to syslog daemon.")
 	rootCmd.PersistentFlags().StringVarP(&setupKey, "setup-key", "k", "", "Setup key obtained from the Management Service Dashboard (used to register peer)")
 	rootCmd.PersistentFlags().StringVar(&preSharedKey, preSharedKeyFlag, "", "Sets Wireguard PreSharedKey property. If set, then only peers that have the same key can communicate.")
 	rootCmd.PersistentFlags().StringVarP(&hostName, "hostname", "n", "", "Sets a custom hostname for the device")

client/firewall/uspfilter/uspfilter.go

@@ -337,7 +337,6 @@ func validateRule(ip net.IP, packetData []byte, rules map[string]Rule, d *decode
 			if rule.dPort != 0 && rule.dPort == uint16(d.udp.DstPort) {
 				return rule.drop, true
 			}
-			return rule.drop, true
 		case layers.LayerTypeICMPv4, layers.LayerTypeICMPv6:
 			return rule.drop, true
 		}

client/internal/dns/host.go

@@ -15,6 +15,12 @@ type hostManager interface {
 	restoreUncleanShutdownDNS(storedDNSAddress *netip.Addr) error
 }
 
+type SystemDNSSettings struct {
+	Domains    []string
+	ServerIP   string
+	ServerPort int
+}
+
 type HostDNSConfig struct {
 	Domains    []DomainConfig `json:"domains"`
 	RouteAll   bool           `json:"routeAll"`

client/internal/dns/host_darwin.go

@@ -7,6 +7,7 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"net"
 	"net/netip"
 	"os/exec"
 	"strconv"
@@ -18,7 +19,7 @@ import (
 const (
 	netbirdDNSStateKeyFormat            = "State:/Network/Service/NetBird-%s/DNS"
 	globalIPv4State                     = "State:/Network/Global/IPv4"
-	primaryServiceSetupKeyFormat        = "Setup:/Network/Service/%s/DNS"
+	primaryServiceStateKeyFormat        = "State:/Network/Service/%s/DNS"
 	keySupplementalMatchDomains         = "SupplementalMatchDomains"
 	keySupplementalMatchDomainsNoSearch = "SupplementalMatchDomainsNoSearch"
 	keyServerAddresses                  = "ServerAddresses"
@@ -28,12 +29,12 @@ const (
 	scutilPath                          = "/usr/sbin/scutil"
 	searchSuffix                        = "Search"
 	matchSuffix                         = "Match"
+	localSuffix                         = "Local"
 )
 
 type systemConfigurator struct {
-	// primaryServiceID primary interface in the system. AKA the interface with the default route
-	primaryServiceID string
-	createdKeys      map[string]struct{}
+	createdKeys       map[string]struct{}
+	systemDNSSettings SystemDNSSettings
 }
 
 func newHostManager() (hostManager, error) {
@@ -49,20 +50,6 @@ func (s *systemConfigurator) supportCustomPort() bool {
 func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	var err error
 
-	if config.RouteAll {
-		err = s.addDNSSetupForAll(config.ServerIP, config.ServerPort)
-		if err != nil {
-			return fmt.Errorf("add dns setup for all: %w", err)
-		}
-	} else if s.primaryServiceID != "" {
-		err = s.removeKeyFromSystemConfig(getKeyWithInput(primaryServiceSetupKeyFormat, s.primaryServiceID))
-		if err != nil {
-			return fmt.Errorf("remote key from system config: %w", err)
-		}
-		s.primaryServiceID = ""
-		log.Infof("removed %s:%d as main DNS resolver for this peer", config.ServerIP, config.ServerPort)
-	}
-
 	// create a file for unclean shutdown detection
 	if err := createUncleanShutdownIndicator(); err != nil {
 		log.Errorf("failed to create unclean shutdown file: %s", err)
@@ -73,6 +60,19 @@ func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		matchDomains  []string
 	)
 
+	err = s.recordSystemDNSSettings(true)
+	if err != nil {
+		log.Errorf("unable to update record of System's DNS config: %s", err.Error())
+	}
+
+	if config.RouteAll {
+		searchDomains = append(searchDomains, "\"\"")
+		err = s.addLocalDNS()
+		if err != nil {
+			log.Infof("failed to enable split DNS")
+		}
+	}
+
 	for _, dConf := range config.Domains {
 		if dConf.Disabled {
 			continue
@@ -110,23 +110,17 @@ func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 }
 
 func (s *systemConfigurator) restoreHostDNS() error {
-	lines := ""
-	for key := range s.createdKeys {
-		lines += buildRemoveKeyOperation(key)
+	keys := s.getRemovableKeysWithDefaults()
+	for _, key := range keys {
 		keyType := "search"
 		if strings.Contains(key, matchSuffix) {
 			keyType = "match"
 		}
 		log.Infof("removing %s domains from system", keyType)
-	}
-	if s.primaryServiceID != "" {
-		lines += buildRemoveKeyOperation(getKeyWithInput(primaryServiceSetupKeyFormat, s.primaryServiceID))
-		log.Infof("restoring DNS resolver configuration for system")
-	}
-	_, err := runSystemConfigCommand(wrapCommand(lines))
-	if err != nil {
-		log.Errorf("got an error while cleaning the system configuration: %s", err)
-		return fmt.Errorf("clean system: %w", err)
+		err := s.removeKeyFromSystemConfig(key)
+		if err != nil {
+			log.Errorf("failed to remove %s domains from system: %s", keyType, err)
+		}
 	}
 
 	if err := removeUncleanShutdownIndicator(); err != nil {
@@ -136,6 +130,19 @@ func (s *systemConfigurator) restoreHostDNS() error {
 	return nil
 }
 
+func (s *systemConfigurator) getRemovableKeysWithDefaults() []string {
+	if len(s.createdKeys) == 0 {
+		// return defaults for startup calls
+		return []string{getKeyWithInput(netbirdDNSStateKeyFormat, searchSuffix), getKeyWithInput(netbirdDNSStateKeyFormat, matchSuffix)}
+	}
+
+	keys := make([]string, 0, len(s.createdKeys))
+	for key := range s.createdKeys {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
 func (s *systemConfigurator) removeKeyFromSystemConfig(key string) error {
 	line := buildRemoveKeyOperation(key)
 	_, err := runSystemConfigCommand(wrapCommand(line))
@@ -148,6 +155,97 @@ func (s *systemConfigurator) removeKeyFromSystemConfig(key string) error {
 	return nil
 }
 
+func (s *systemConfigurator) addLocalDNS() error {
+	if s.systemDNSSettings.ServerIP == "" || len(s.systemDNSSettings.Domains) == 0 {
+		err := s.recordSystemDNSSettings(true)
+		log.Errorf("Unable to get system DNS configuration")
+		return err
+	}
+	localKey := getKeyWithInput(netbirdDNSStateKeyFormat, localSuffix)
+	if s.systemDNSSettings.ServerIP != "" && len(s.systemDNSSettings.Domains) != 0 {
+		err := s.addSearchDomains(localKey, strings.Join(s.systemDNSSettings.Domains, " "), s.systemDNSSettings.ServerIP, s.systemDNSSettings.ServerPort)
+		if err != nil {
+			return fmt.Errorf("couldn't add local network DNS conf: %w", err)
+		}
+	} else {
+		log.Info("Not enabling local DNS server")
+	}
+
+	return nil
+}
+
+func (s *systemConfigurator) recordSystemDNSSettings(force bool) error {
+	if s.systemDNSSettings.ServerIP != "" && len(s.systemDNSSettings.Domains) != 0 && !force {
+		return nil
+	}
+
+	systemDNSSettings, err := s.getSystemDNSSettings()
+	if err != nil {
+		return fmt.Errorf("couldn't get current DNS config: %w", err)
+	}
+	s.systemDNSSettings = systemDNSSettings
+
+	return nil
+}
+
+func (s *systemConfigurator) getSystemDNSSettings() (SystemDNSSettings, error) {
+	primaryServiceKey, _, err := s.getPrimaryService()
+	if err != nil || primaryServiceKey == "" {
+		return SystemDNSSettings{}, fmt.Errorf("couldn't find the primary service key: %w", err)
+	}
+	dnsServiceKey := getKeyWithInput(primaryServiceStateKeyFormat, primaryServiceKey)
+	line := buildCommandLine("show", dnsServiceKey, "")
+	stdinCommands := wrapCommand(line)
+
+	b, err := runSystemConfigCommand(stdinCommands)
+	if err != nil {
+		return SystemDNSSettings{}, fmt.Errorf("sending the command: %w", err)
+	}
+
+	var dnsSettings SystemDNSSettings
+	inSearchDomainsArray := false
+	inServerAddressesArray := false
+
+	scanner := bufio.NewScanner(bytes.NewReader(b))
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		switch {
+		case strings.HasPrefix(line, "DomainName :"):
+			domainName := strings.TrimSpace(strings.Split(line, ":")[1])
+			dnsSettings.Domains = append(dnsSettings.Domains, domainName)
+		case line == "SearchDomains : <array> {":
+			inSearchDomainsArray = true
+			continue
+		case line == "ServerAddresses : <array> {":
+			inServerAddressesArray = true
+			continue
+		case line == "}":
+			inSearchDomainsArray = false
+			inServerAddressesArray = false
+		}
+
+		if inSearchDomainsArray {
+			searchDomain := strings.Split(line, " : ")[1]
+			dnsSettings.Domains = append(dnsSettings.Domains, searchDomain)
+		} else if inServerAddressesArray {
+			address := strings.Split(line, " : ")[1]
+			if ip := net.ParseIP(address); ip != nil && ip.To4() != nil {
+				dnsSettings.ServerIP = address
+				inServerAddressesArray = false // Stop reading after finding the first IPv4 address
+			}
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return dnsSettings, err
+	}
+
+	// default to 53 port
+	dnsSettings.ServerPort = 53
+
+	return dnsSettings, nil
+}
+
 func (s *systemConfigurator) addSearchDomains(key, domains string, ip string, port int) error {
 	err := s.addDNSState(key, domains, ip, port, true)
 	if err != nil {
@@ -194,23 +292,6 @@ func (s *systemConfigurator) addDNSState(state, domains, dnsServer string, port
 	return nil
 }
 
-func (s *systemConfigurator) addDNSSetupForAll(dnsServer string, port int) error {
-	primaryServiceKey, existingNameserver, err := s.getPrimaryService()
-	if err != nil || primaryServiceKey == "" {
-		return fmt.Errorf("couldn't find the primary service key: %w", err)
-	}
-
-	err = s.addDNSSetup(getKeyWithInput(primaryServiceSetupKeyFormat, primaryServiceKey), dnsServer, port, existingNameserver)
-	if err != nil {
-		return fmt.Errorf("add dns setup: %w", err)
-	}
-
-	log.Infof("configured %s:%d as main DNS resolver for this peer", dnsServer, port)
-	s.primaryServiceID = primaryServiceKey
-
-	return nil
-}
-
 func (s *systemConfigurator) getPrimaryService() (string, string, error) {
 	line := buildCommandLine("show", globalIPv4State, "")
 	stdinCommands := wrapCommand(line)
@@ -239,19 +320,6 @@ func (s *systemConfigurator) getPrimaryService() (string, string, error) {
 	return primaryService, router, nil
 }
 
-func (s *systemConfigurator) addDNSSetup(setupKey, dnsServer string, port int, existingDNSServer string) error {
-	lines := buildAddCommandLine(keySupplementalMatchDomainsNoSearch, digitSymbol+strconv.Itoa(0))
-	lines += buildAddCommandLine(keyServerAddresses, arraySymbol+dnsServer+" "+existingDNSServer)
-	lines += buildAddCommandLine(keyServerPort, digitSymbol+strconv.Itoa(port))
-	addDomainCommand := buildCreateStateWithOperation(setupKey, lines)
-	stdinCommands := wrapCommand(addDomainCommand)
-	_, err := runSystemConfigCommand(stdinCommands)
-	if err != nil {
-		return fmt.Errorf("applying dns setup, error: %w", err)
-	}
-	return nil
-}
-
 func (s *systemConfigurator) restoreUncleanShutdownDNS(*netip.Addr) error {
 	if err := s.restoreHostDNS(); err != nil {
 		return fmt.Errorf("restoring dns via scutil: %w", err)

client/internal/dns/upstream.go

@@ -24,7 +24,7 @@ const (
 	probeTimeout     = 2 * time.Second
 )
 
-const testRecord = "."
+const testRecord = "com."
 
 type upstreamClient interface {
 	exchange(ctx context.Context, upstream string, r *dns.Msg) (*dns.Msg, time.Duration, error)
@@ -42,6 +42,7 @@ type upstreamResolverBase struct {
 	upstreamServers  []string
 	disabled         bool
 	failsCount       atomic.Int32
+	successCount     atomic.Int32
 	failsTillDeact   int32
 	mutex            sync.Mutex
 	reactivatePeriod time.Duration
@@ -124,6 +125,7 @@ func (u *upstreamResolverBase) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 			return
 		}
 
+		u.successCount.Add(1)
 		log.Tracef("took %s to query the upstream %s", t, upstream)
 
 		err = w.WriteMsg(rm)
@@ -172,6 +174,11 @@ func (u *upstreamResolverBase) probeAvailability() {
 	default:
 	}
 
+	// avoid probe if upstreams could resolve at least one query and fails count is less than failsTillDeact
+	if u.successCount.Load() > 0 && u.failsCount.Load() < u.failsTillDeact {
+		return
+	}
+
 	var success bool
 	var mu sync.Mutex
 	var wg sync.WaitGroup
@@ -183,7 +190,7 @@ func (u *upstreamResolverBase) probeAvailability() {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			err := u.testNameserver(upstream)
+			err := u.testNameserver(upstream, 500*time.Millisecond)
 			if err != nil {
 				errors = multierror.Append(errors, err)
 				log.Warnf("probing upstream nameserver %s: %s", upstream, err)
@@ -224,7 +231,7 @@ func (u *upstreamResolverBase) waitUntilResponse() {
 		}
 
 		for _, upstream := range u.upstreamServers {
-			if err := u.testNameserver(upstream); err != nil {
+			if err := u.testNameserver(upstream, probeTimeout); err != nil {
 				log.Tracef("upstream check for %s: %s", upstream, err)
 			} else {
 				// at least one upstream server is available, stop probing
@@ -244,6 +251,7 @@ func (u *upstreamResolverBase) waitUntilResponse() {
 
 	log.Infof("upstreams %s are responsive again. Adding them back to system", u.upstreamServers)
 	u.failsCount.Store(0)
+	u.successCount.Add(1)
 	u.reactivate()
 	u.disabled = false
 }
@@ -265,13 +273,14 @@ func (u *upstreamResolverBase) disable(err error) {
 	}
 
 	log.Warnf("Upstream resolving is Disabled for %v", reactivatePeriod)
+	u.successCount.Store(0)
 	u.deactivate(err)
 	u.disabled = true
 	go u.waitUntilResponse()
 }
 
-func (u *upstreamResolverBase) testNameserver(server string) error {
-	ctx, cancel := context.WithTimeout(u.ctx, probeTimeout)
+func (u *upstreamResolverBase) testNameserver(server string, timeout time.Duration) error {
+	ctx, cancel := context.WithTimeout(u.ctx, timeout)
 	defer cancel()
 
 	r := new(dns.Msg).SetQuestion(testRecord, dns.TypeSOA)

client/internal/networkmonitor/monitor_bsd.go

@@ -4,6 +4,7 @@ package networkmonitor
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"syscall"
 	"unsafe"
@@ -21,11 +22,20 @@ func checkChange(ctx context.Context, nexthopv4, nexthopv6 systemops.Nexthop, ca
 		return fmt.Errorf("failed to open routing socket: %v", err)
 	}
 	defer func() {
-		if err := unix.Close(fd); err != nil {
+		err := unix.Close(fd)
+		if err != nil && !errors.Is(err, unix.EBADF) {
 			log.Errorf("Network monitor: failed to close routing socket: %v", err)
 		}
 	}()
 
+	go func() {
+		<-ctx.Done()
+		err := unix.Close(fd)
+		if err != nil && !errors.Is(err, unix.EBADF) {
+			log.Debugf("Network monitor: closed routing socket")
+		}
+	}()
+
 	for {
 		select {
 		case <-ctx.Done():
@@ -34,7 +44,9 @@ func checkChange(ctx context.Context, nexthopv4, nexthopv6 systemops.Nexthop, ca
 			buf := make([]byte, 2048)
 			n, err := unix.Read(fd, buf)
 			if err != nil {
-				log.Errorf("Network monitor: failed to read from routing socket: %v", err)
+				if !errors.Is(err, unix.EBADF) && !errors.Is(err, unix.EINVAL) {
+					log.Errorf("Network monitor: failed to read from routing socket: %v", err)
+				}
 				continue
 			}
 			if n < unix.SizeofRtMsghdr {

client/internal/networkmonitor/monitor_windows.go

@@ -99,6 +99,11 @@ func routeChanged(nexthop systemops.Nexthop, intf *net.Interface, routes []syste
 		return false
 	}
 
+	if isSoftInterface(nexthop.Intf.Name) {
+		log.Tracef("network monitor: ignoring default route change for soft interface %s", nexthop.Intf.Name)
+		return false
+	}
+
 	unspec := getUnspecifiedPrefix(nexthop.IP)
 	defaultRoutes, foundMatchingRoute := processRoutes(nexthop, intf, routes, unspec)
 
@@ -119,7 +124,7 @@ func getUnspecifiedPrefix(ip netip.Addr) netip.Prefix {
 	return netip.PrefixFrom(netip.IPv4Unspecified(), 0)
 }
 
-func processRoutes(nexthop systemops.Nexthop, intf *net.Interface, routes []systemops.Route, unspec netip.Prefix) ([]string, bool) {
+func processRoutes(nexthop systemops.Nexthop, nexthopIntf *net.Interface, routes []systemops.Route, unspec netip.Prefix) ([]string, bool) {
 	var defaultRoutes []string
 	foundMatchingRoute := false
 
@@ -128,7 +133,7 @@ func processRoutes(nexthop systemops.Nexthop, intf *net.Interface, routes []syst
 			routeInfo := formatRouteInfo(r)
 			defaultRoutes = append(defaultRoutes, routeInfo)
 
-			if r.Nexthop == nexthop.IP && compareIntf(r.Interface, intf) == 0 {
+			if r.Nexthop == nexthop.IP && compareIntf(r.Interface, nexthopIntf) == 0 {
 				foundMatchingRoute = true
 				log.Debugf("network monitor: found matching default route: %s", routeInfo)
 			}
@@ -232,14 +237,18 @@ func stateFromInt(state uint8) string {
 }
 
 func compareIntf(a, b *net.Interface) int {
-	if a == nil && b == nil {
+	switch {
+	case a == nil && b == nil:
 		return 0
-	}
-	if a == nil {
+	case a == nil:
 		return -1
-	}
-	if b == nil {
+	case b == nil:
 		return 1
+	default:
+		return a.Index - b.Index
 	}
-	return a.Index - b.Index
+}
+
+func isSoftInterface(name string) bool {
+	return strings.Contains(strings.ToLower(name), "isatap") || strings.Contains(strings.ToLower(name), "teredo")
 }

client/internal/routemanager/client.go

@@ -3,6 +3,7 @@ package routemanager
 import (
 	"context"
 	"fmt"
+	"reflect"
 	"time"
 
 	"github.com/hashicorp/go-multierror"
@@ -303,22 +304,33 @@ func (c *clientNetwork) sendUpdateToClientNetworkWatcher(update routesUpdate) {
 	}()
 }
 
-func (c *clientNetwork) handleUpdate(update routesUpdate) {
+func (c *clientNetwork) handleUpdate(update routesUpdate) bool {
+	isUpdateMapDifferent := false
 	updateMap := make(map[route.ID]*route.Route)
 
 	for _, r := range update.routes {
 		updateMap[r.ID] = r
 	}
 
+	if len(c.routes) != len(updateMap) {
+		isUpdateMapDifferent = true
+	}
+
 	for id, r := range c.routes {
 		_, found := updateMap[id]
 		if !found {
 			close(c.routePeersNotifiers[r.Peer])
 			delete(c.routePeersNotifiers, r.Peer)
+			isUpdateMapDifferent = true
+			continue
+		}
+		if !reflect.DeepEqual(c.routes[id], updateMap[id]) {
+			isUpdateMapDifferent = true
 		}
 	}
 
 	c.routes = updateMap
+	return isUpdateMapDifferent
 }
 
 // peersStateAndUpdateWatcher is the main point of reacting on client network routing events.
@@ -345,13 +357,19 @@ func (c *clientNetwork) peersStateAndUpdateWatcher() {
 
 			log.Debugf("Received a new client network route update for [%v]", c.handler)
 
-			c.handleUpdate(update)
+			// hash update somehow
+			isTrueRouteUpdate := c.handleUpdate(update)
 
 			c.updateSerial = update.updateSerial
 
-			err := c.recalculateRouteAndUpdatePeerAndSystem()
-			if err != nil {
-				log.Errorf("Failed to recalculate routes for network [%v]: %v", c.handler, err)
+			if isTrueRouteUpdate {
+				log.Debug("Client network update contains different routes, recalculating routes")
+				err := c.recalculateRouteAndUpdatePeerAndSystem()
+				if err != nil {
+					log.Errorf("Failed to recalculate routes for network [%v]: %v", c.handler, err)
+				}
+			} else {
+				log.Debug("Route update is not different, skipping route recalculation")
 			}
 
 			c.startPeersStatusChangeWatcher()

client/internal/routemanager/manager.go

@@ -16,6 +16,7 @@ import (
 	firewall "github.com/netbirdio/netbird/client/firewall/manager"
 	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
+	"github.com/netbirdio/netbird/client/internal/routemanager/notifier"
 	"github.com/netbirdio/netbird/client/internal/routemanager/refcounter"
 	"github.com/netbirdio/netbird/client/internal/routemanager/systemops"
 	"github.com/netbirdio/netbird/client/internal/routemanager/vars"
@@ -50,7 +51,7 @@ type DefaultManager struct {
 	statusRecorder       *peer.Status
 	wgInterface          iface.IWGIface
 	pubKey               string
-	notifier             *notifier
+	notifier             *notifier.Notifier
 	routeRefCounter      *refcounter.RouteRefCounter
 	allowedIPsRefCounter *refcounter.AllowedIPsRefCounter
 	dnsRouteInterval     time.Duration
@@ -65,7 +66,8 @@ func NewManager(
 	initialRoutes []*route.Route,
 ) *DefaultManager {
 	mCTX, cancel := context.WithCancel(ctx)
-	sysOps := systemops.NewSysOps(wgInterface)
+	notifier := notifier.NewNotifier()
+	sysOps := systemops.NewSysOps(wgInterface, notifier)
 
 	dm := &DefaultManager{
 		ctx:              mCTX,
@@ -77,7 +79,7 @@ func NewManager(
 		statusRecorder:   statusRecorder,
 		wgInterface:      wgInterface,
 		pubKey:           pubKey,
-		notifier:         newNotifier(),
+		notifier:         notifier,
 	}
 
 	dm.routeRefCounter = refcounter.New(
@@ -107,7 +109,7 @@ func NewManager(
 
 	if runtime.GOOS == "android" {
 		cr := dm.clientRoutes(initialRoutes)
-		dm.notifier.setInitialClientRoutes(cr)
+		dm.notifier.SetInitialClientRoutes(cr)
 	}
 	return dm
 }
@@ -186,7 +188,7 @@ func (m *DefaultManager) UpdateRoutes(updateSerial uint64, newRoutes []*route.Ro
 
 		filteredClientRoutes := m.routeSelector.FilterSelected(newClientRoutesIDMap)
 		m.updateClientNetworks(updateSerial, filteredClientRoutes)
-		m.notifier.onNewRoutes(filteredClientRoutes)
+		m.notifier.OnNewRoutes(filteredClientRoutes)
 
 		if m.serverRouter != nil {
 			err := m.serverRouter.updateRoutes(newServerRoutesMap)
@@ -199,14 +201,14 @@ func (m *DefaultManager) UpdateRoutes(updateSerial uint64, newRoutes []*route.Ro
 	}
 }
 
-// SetRouteChangeListener set RouteListener for route change notifier
+// SetRouteChangeListener set RouteListener for route change Notifier
 func (m *DefaultManager) SetRouteChangeListener(listener listener.NetworkChangeListener) {
-	m.notifier.setListener(listener)
+	m.notifier.SetListener(listener)
 }
 
 // InitialRouteRange return the list of initial routes. It used by mobile systems
 func (m *DefaultManager) InitialRouteRange() []string {
-	return m.notifier.getInitialRouteRanges()
+	return m.notifier.GetInitialRouteRanges()
 }
 
 // GetRouteSelector returns the route selector
@@ -226,7 +228,7 @@ func (m *DefaultManager) TriggerSelection(networks route.HAMap) {
 
 	networks = m.routeSelector.FilterSelected(networks)
 
-	m.notifier.onNewRoutes(networks)
+	m.notifier.OnNewRoutes(networks)
 
 	m.stopObsoleteClients(networks)
 

client/internal/routemanager/notifier/notifier.go

@@ -1,6 +1,7 @@
-package routemanager
+package notifier
 
 import (
+	"net/netip"
 	"runtime"
 	"sort"
 	"strings"
@@ -10,7 +11,7 @@ import (
 	"github.com/netbirdio/netbird/route"
 )
 
-type notifier struct {
+type Notifier struct {
 	initialRouteRanges []string
 	routeRanges        []string
 
@@ -18,17 +19,17 @@ type notifier struct {
 	listenerMux sync.Mutex
 }
 
-func newNotifier() *notifier {
-	return &notifier{}
+func NewNotifier() *Notifier {
+	return &Notifier{}
 }
 
-func (n *notifier) setListener(listener listener.NetworkChangeListener) {
+func (n *Notifier) SetListener(listener listener.NetworkChangeListener) {
 	n.listenerMux.Lock()
 	defer n.listenerMux.Unlock()
 	n.listener = listener
 }
 
-func (n *notifier) setInitialClientRoutes(clientRoutes []*route.Route) {
+func (n *Notifier) SetInitialClientRoutes(clientRoutes []*route.Route) {
 	nets := make([]string, 0)
 	for _, r := range clientRoutes {
 		nets = append(nets, r.Network.String())
@@ -37,7 +38,10 @@ func (n *notifier) setInitialClientRoutes(clientRoutes []*route.Route) {
 	n.initialRouteRanges = nets
 }
 
-func (n *notifier) onNewRoutes(idMap route.HAMap) {
+func (n *Notifier) OnNewRoutes(idMap route.HAMap) {
+	if runtime.GOOS != "android" {
+		return
+	}
 	newNets := make([]string, 0)
 	for _, routes := range idMap {
 		for _, r := range routes {
@@ -62,7 +66,30 @@ func (n *notifier) onNewRoutes(idMap route.HAMap) {
 	n.notify()
 }
 
-func (n *notifier) notify() {
+func (n *Notifier) OnNewPrefixes(prefixes []netip.Prefix) {
+	newNets := make([]string, 0)
+	for _, prefix := range prefixes {
+		newNets = append(newNets, prefix.String())
+	}
+
+	sort.Strings(newNets)
+	switch runtime.GOOS {
+	case "android":
+		if !n.hasDiff(n.initialRouteRanges, newNets) {
+			return
+		}
+	default:
+		if !n.hasDiff(n.routeRanges, newNets) {
+			return
+		}
+	}
+
+	n.routeRanges = newNets
+
+	n.notify()
+}
+
+func (n *Notifier) notify() {
 	n.listenerMux.Lock()
 	defer n.listenerMux.Unlock()
 	if n.listener == nil {
@@ -74,7 +101,7 @@ func (n *notifier) notify() {
 	}(n.listener)
 }
 
-func (n *notifier) hasDiff(a []string, b []string) bool {
+func (n *Notifier) hasDiff(a []string, b []string) bool {
 	if len(a) != len(b) {
 		return true
 	}
@@ -86,7 +113,7 @@ func (n *notifier) hasDiff(a []string, b []string) bool {
 	return false
 }
 
-func (n *notifier) getInitialRouteRanges() []string {
+func (n *Notifier) GetInitialRouteRanges() []string {
 	return addIPv6RangeIfNeeded(n.initialRouteRanges)
 }
 

client/internal/routemanager/systemops/systemops.go

@@ -3,7 +3,9 @@ package systemops
 import (
 	"net"
 	"net/netip"
+	"sync"
 
+	"github.com/netbirdio/netbird/client/internal/routemanager/notifier"
 	"github.com/netbirdio/netbird/client/internal/routemanager/refcounter"
 	"github.com/netbirdio/netbird/iface"
 )
@@ -18,10 +20,19 @@ type ExclusionCounter = refcounter.Counter[any, Nexthop]
 type SysOps struct {
 	refCounter  *ExclusionCounter
 	wgInterface iface.IWGIface
+	// prefixes is tracking all the current added prefixes im memory
+	// (this is used in iOS as all route updates require a full table update)
+	//nolint
+	prefixes map[netip.Prefix]struct{}
+	//nolint
+	mu sync.Mutex
+	// notifier is used to notify the system of route changes (also used on mobile)
+	notifier *notifier.Notifier
 }
 
-func NewSysOps(wgInterface iface.IWGIface) *SysOps {
+func NewSysOps(wgInterface iface.IWGIface, notifier *notifier.Notifier) *SysOps {
 	return &SysOps{
 		wgInterface: wgInterface,
+		notifier:    notifier,
 	}
 }

client/internal/routemanager/systemops/systemops_android.go

@@ -1,4 +1,4 @@
-//go:build ios || android
+//go:build android
 
 package systemops
 

client/internal/routemanager/systemops/systemops_bsd_test.go

@@ -36,7 +36,7 @@ func TestConcurrentRoutes(t *testing.T) {
 	baseIP := netip.MustParseAddr("192.0.2.0")
 	intf := &net.Interface{Name: "lo0"}
 
-	r := NewSysOps(nil)
+	r := NewSysOps(nil, nil)
 
 	var wg sync.WaitGroup
 	for i := 0; i < 1024; i++ {

client/internal/routemanager/systemops/systemops_generic.go

@@ -50,7 +50,7 @@ func (r *SysOps) setupRefCounter(initAddresses []net.IP) (nbnet.AddHookFunc, nbn
 			nexthop, err := r.addRouteToNonVPNIntf(prefix, r.wgInterface, initialNexthop)
 			if errors.Is(err, vars.ErrRouteNotAllowed) || errors.Is(err, vars.ErrRouteNotFound) {
 				log.Tracef("Adding for prefix %s: %v", prefix, err)
-				// These errors are not critical but also we should not track and try to remove the routes either.
+				// These errors are not critical, but also we should not track and try to remove the routes either.
 				return nexthop, refcounter.ErrIgnore
 			}
 			return nexthop, err
@@ -135,6 +135,11 @@ func (r *SysOps) addRouteToNonVPNIntf(prefix netip.Prefix, vpnIntf iface.IWGIfac
 		return Nexthop{}, vars.ErrRouteNotAllowed
 	}
 
+	// Check if the prefix is part of any local subnets
+	if isLocal, subnet := r.isPrefixInLocalSubnets(prefix); isLocal {
+		return Nexthop{}, fmt.Errorf("prefix %s is part of local subnet %s: %w", prefix, subnet, vars.ErrRouteNotAllowed)
+	}
+
 	// Determine the exit interface and next hop for the prefix, so we can add a specific route
 	nexthop, err := GetNextHop(addr)
 	if err != nil {
@@ -167,6 +172,36 @@ func (r *SysOps) addRouteToNonVPNIntf(prefix netip.Prefix, vpnIntf iface.IWGIfac
 	return exitNextHop, nil
 }
 
+func (r *SysOps) isPrefixInLocalSubnets(prefix netip.Prefix) (bool, *net.IPNet) {
+	localInterfaces, err := net.Interfaces()
+	if err != nil {
+		log.Errorf("Failed to get local interfaces: %v", err)
+		return false, nil
+	}
+
+	for _, intf := range localInterfaces {
+		addrs, err := intf.Addrs()
+		if err != nil {
+			log.Errorf("Failed to get addresses for interface %s: %v", intf.Name, err)
+			continue
+		}
+
+		for _, addr := range addrs {
+			ipnet, ok := addr.(*net.IPNet)
+			if !ok {
+				log.Errorf("Failed to convert address to IPNet: %v", addr)
+				continue
+			}
+
+			if ipnet.Contains(prefix.Addr().AsSlice()) {
+				return true, ipnet
+			}
+		}
+	}
+
+	return false, nil
+}
+
 // genericAddVPNRoute adds a new route to the vpn interface, it splits the default prefix
 // in two /1 prefixes to avoid replacing the existing default route
 func (r *SysOps) genericAddVPNRoute(prefix netip.Prefix, intf *net.Interface) error {

client/internal/routemanager/systemops/systemops_generic_test.go

@@ -68,7 +68,7 @@ func TestAddRemoveRoutes(t *testing.T) {
 			err = wgInterface.Create()
 			require.NoError(t, err, "should create testing wireguard interface")
 
-			r := NewSysOps(wgInterface)
+			r := NewSysOps(wgInterface, nil)
 
 			_, _, err = r.SetupRouting(nil)
 			require.NoError(t, err)
@@ -224,7 +224,7 @@ func TestAddExistAndRemoveRoute(t *testing.T) {
 			require.NoError(t, err, "InterfaceByName should not return err")
 			intf := &net.Interface{Index: index.Index, Name: wgInterface.Name()}
 
-			r := NewSysOps(wgInterface)
+			r := NewSysOps(wgInterface, nil)
 
 			// Prepare the environment
 			if testCase.preExistingPrefix.IsValid() {
@@ -379,7 +379,7 @@ func setupTestEnv(t *testing.T) {
 		assert.NoError(t, wgInterface.Close())
 	})
 
-	r := NewSysOps(wgInterface)
+	r := NewSysOps(wgInterface, nil)
 	_, _, err := r.SetupRouting(nil)
 	require.NoError(t, err, "setupRouting should not return err")
 	t.Cleanup(func() {

client/internal/routemanager/systemops/systemops_ios.go

@@ -0,0 +1,64 @@
+//go:build ios
+
+package systemops
+
+import (
+	"net"
+	"net/netip"
+	"runtime"
+
+	log "github.com/sirupsen/logrus"
+
+	nbnet "github.com/netbirdio/netbird/util/net"
+)
+
+func (r *SysOps) SetupRouting([]net.IP) (nbnet.AddHookFunc, nbnet.RemoveHookFunc, error) {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	r.prefixes = make(map[netip.Prefix]struct{})
+	return nil, nil, nil
+}
+
+func (r *SysOps) CleanupRouting() error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	r.prefixes = make(map[netip.Prefix]struct{})
+	r.notify()
+	return nil
+}
+
+func (r *SysOps) AddVPNRoute(prefix netip.Prefix, _ *net.Interface) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	r.prefixes[prefix] = struct{}{}
+	r.notify()
+	return nil
+}
+
+func (r *SysOps) RemoveVPNRoute(prefix netip.Prefix, _ *net.Interface) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	delete(r.prefixes, prefix)
+	r.notify()
+	return nil
+}
+
+func EnableIPForwarding() error {
+	log.Infof("Enable IP forwarding is not implemented on %s", runtime.GOOS)
+	return nil
+}
+
+func IsAddrRouted(netip.Addr, []netip.Prefix) (bool, netip.Prefix) {
+	return false, netip.Prefix{}
+}
+
+func (r *SysOps) notify() {
+	prefixes := make([]netip.Prefix, 0, len(r.prefixes))
+	for prefix := range r.prefixes {
+		prefixes = append(prefixes, prefix)
+	}
+	r.notifier.OnNewPrefixes(prefixes)
+}

client/internal/routemanager/systemops/systemops_windows_test.go

@@ -73,7 +73,7 @@ var testCases = []testCase{
 	{
 		name:               "To duplicate internal route without custom dialer via physical interface", // local route takes precedence
 		destination:        "10.0.0.2:53",
-		expectedSourceIP:   "10.0.0.1",
+		expectedSourceIP:   "127.0.0.1",
 		expectedDestPrefix: "10.0.0.0/8",
 		expectedNextHop:    "0.0.0.0",
 		expectedInterface:  "Loopback Pseudo-Interface 1",
@@ -110,7 +110,7 @@ var testCases = []testCase{
 	{
 		name:               "To more specific route (local) without custom dialer via physical interface",
 		destination:        "127.0.10.2:53",
-		expectedSourceIP:   "10.0.0.1",
+		expectedSourceIP:   "127.0.0.1",
 		expectedDestPrefix: "127.0.0.0/8",
 		expectedNextHop:    "0.0.0.0",
 		expectedInterface:  "Loopback Pseudo-Interface 1",
@@ -181,31 +181,6 @@ func testRoute(t *testing.T, destination string, dialer dialer) *FindNetRouteOut
 	return combinedOutput
 }
 
-func createAndSetupDummyInterface(t *testing.T, interfaceName, ipAddressCIDR string) string {
-	t.Helper()
-
-	ip, ipNet, err := net.ParseCIDR(ipAddressCIDR)
-	require.NoError(t, err)
-	subnetMaskSize, _ := ipNet.Mask.Size()
-	script := fmt.Sprintf(`New-NetIPAddress -InterfaceAlias "%s" -IPAddress "%s" -PrefixLength %d -PolicyStore ActiveStore -Confirm:$False`, interfaceName, ip.String(), subnetMaskSize)
-	_, err = exec.Command("powershell", "-Command", script).CombinedOutput()
-	require.NoError(t, err, "Failed to assign IP address to loopback adapter")
-
-	// Wait for the IP address to be applied
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
-	defer cancel()
-	err = waitForIPAddress(ctx, interfaceName, ip.String())
-	require.NoError(t, err, "IP address not applied within timeout")
-
-	t.Cleanup(func() {
-		script = fmt.Sprintf(`Remove-NetIPAddress -InterfaceAlias "%s" -IPAddress "%s" -Confirm:$False`, interfaceName, ip.String())
-		_, err = exec.Command("powershell", "-Command", script).CombinedOutput()
-		require.NoError(t, err, "Failed to remove IP address from loopback adapter")
-	})
-
-	return interfaceName
-}
-
 func fetchOriginalGateway() (*RouteInfo, error) {
 	cmd := exec.Command("powershell", "-Command", "Get-NetRoute -DestinationPrefix 0.0.0.0/0 | Select-Object Nexthop, RouteMetric, InterfaceAlias | ConvertTo-Json")
 	output, err := cmd.CombinedOutput()
@@ -231,30 +206,6 @@ func verifyOutput(t *testing.T, output *FindNetRouteOutput, sourceIP, destPrefix
 	assert.Equal(t, intf, output.InterfaceAlias, "Interface mismatch")
 }
 
-func waitForIPAddress(ctx context.Context, interfaceAlias, expectedIPAddress string) error {
-	ticker := time.NewTicker(1 * time.Second)
-	defer ticker.Stop()
-
-	for {
-		select {
-		case <-ctx.Done():
-			return ctx.Err()
-		case <-ticker.C:
-			out, err := exec.Command("powershell", "-Command", fmt.Sprintf(`Get-NetIPAddress -InterfaceAlias "%s" | Select-Object -ExpandProperty IPAddress`, interfaceAlias)).CombinedOutput()
-			if err != nil {
-				return err
-			}
-
-			ipAddresses := strings.Split(strings.TrimSpace(string(out)), "\n")
-			for _, ip := range ipAddresses {
-				if strings.TrimSpace(ip) == expectedIPAddress {
-					return nil
-				}
-			}
-		}
-	}
-}
-
 func combineOutputs(outputs []FindNetRouteOutput) *FindNetRouteOutput {
 	var combined FindNetRouteOutput
 
@@ -285,5 +236,25 @@ func combineOutputs(outputs []FindNetRouteOutput) *FindNetRouteOutput {
 func setupDummyInterfacesAndRoutes(t *testing.T) {
 	t.Helper()
 
-	createAndSetupDummyInterface(t, "Loopback Pseudo-Interface 1", "10.0.0.1/8")
+	addDummyRoute(t, "10.0.0.0/8")
+}
+
+func addDummyRoute(t *testing.T, dstCIDR string) {
+	t.Helper()
+
+	script := fmt.Sprintf(`New-NetRoute -DestinationPrefix "%s" -InterfaceIndex 1 -PolicyStore ActiveStore`, dstCIDR)
+
+	output, err := exec.Command("powershell", "-Command", script).CombinedOutput()
+	if err != nil {
+		t.Logf("Failed to add dummy route: %v\nOutput: %s", err, output)
+		t.FailNow()
+	}
+
+	t.Cleanup(func() {
+		script = fmt.Sprintf(`Remove-NetRoute -DestinationPrefix  "%s" -InterfaceIndex 1 -Confirm:$false`, dstCIDR)
+		output, err := exec.Command("powershell", "-Command", script).CombinedOutput()
+		if err != nil {
+			t.Logf("Failed to remove dummy route: %v\nOutput: %s", err, output)
+		}
+	})
 }

client/ios/NetBirdSDK/client.go

@@ -19,6 +19,7 @@ import (
 	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/formatter"
+	"github.com/netbirdio/netbird/management/domain"
 	"github.com/netbirdio/netbird/route"
 )
 
@@ -47,6 +48,7 @@ type CustomLogger interface {
 type selectRoute struct {
 	NetID    string
 	Network  netip.Prefix
+	Domains  domain.List
 	Selected bool
 }
 
@@ -279,6 +281,7 @@ func (c *Client) GetRoutesSelectionDetails() (*RoutesSelectionDetails, error) {
 		route := &selectRoute{
 			NetID:    string(id),
 			Network:  rt[0].Network,
+			Domains:  rt[0].Domains,
 			Selected: routeSelector.IsSelected(id),
 		}
 		routes = append(routes, route)
@@ -299,17 +302,40 @@ func (c *Client) GetRoutesSelectionDetails() (*RoutesSelectionDetails, error) {
 		return iPrefix < jPrefix
 	})
 
+	resolvedDomains := c.recorder.GetResolvedDomainsStates()
+
+	return prepareRouteSelectionDetails(routes, resolvedDomains), nil
+
+}
+
+func prepareRouteSelectionDetails(routes []*selectRoute, resolvedDomains map[domain.Domain][]netip.Prefix) *RoutesSelectionDetails {
 	var routeSelection []RoutesSelectionInfo
 	for _, r := range routes {
+		domainList := make([]DomainInfo, 0)
+		for _, d := range r.Domains {
+			domainResp := DomainInfo{
+				Domain: d.SafeString(),
+			}
+			if prefixes, exists := resolvedDomains[d]; exists {
+				var ipStrings []string
+				for _, prefix := range prefixes {
+					ipStrings = append(ipStrings, prefix.Addr().String())
+				}
+				domainResp.ResolvedIPs = strings.Join(ipStrings, ", ")
+			}
+			domainList = append(domainList, domainResp)
+		}
+		domainDetails := DomainDetails{items: domainList}
 		routeSelection = append(routeSelection, RoutesSelectionInfo{
 			ID:       r.NetID,
 			Network:  r.Network.String(),
+			Domains:  &domainDetails,
 			Selected: r.Selected,
 		})
 	}
 
 	routeSelectionDetails := RoutesSelectionDetails{items: routeSelection}
-	return &routeSelectionDetails, nil
+	return &routeSelectionDetails
 }
 
 func (c *Client) SelectRoute(id string) error {

client/ios/NetBirdSDK/routes.go

@@ -16,9 +16,25 @@ type RoutesSelectionDetails struct {
 type RoutesSelectionInfo struct {
 	ID       string
 	Network  string
+	Domains  *DomainDetails
 	Selected bool
 }
 
+type DomainCollection interface {
+	Add(s DomainInfo) DomainCollection
+	Get(i int) *DomainInfo
+	Size() int
+}
+
+type DomainDetails struct {
+	items []DomainInfo
+}
+
+type DomainInfo struct {
+	Domain      string
+	ResolvedIPs string
+}
+
 // Add new PeerInfo to the collection
 func (array RoutesSelectionDetails) Add(s RoutesSelectionInfo) RoutesSelectionDetails {
 	array.items = append(array.items, s)
@@ -34,3 +50,16 @@ func (array RoutesSelectionDetails) Get(i int) *RoutesSelectionInfo {
 func (array RoutesSelectionDetails) Size() int {
 	return len(array.items)
 }
+
+func (array DomainDetails) Add(s DomainInfo) DomainCollection {
+	array.items = append(array.items, s)
+	return array
+}
+
+func (array DomainDetails) Get(i int) *DomainInfo {
+	return &array.items[i]
+}
+
+func (array DomainDetails) Size() int {
+	return len(array.items)
+}

client/server/server.go

@@ -582,7 +582,7 @@ func (s *Server) Up(callerCtx context.Context, _ *proto.UpRequest) (*proto.UpRes
 }
 
 // Down engine work in the daemon.
-func (s *Server) Down(_ context.Context, _ *proto.DownRequest) (*proto.DownResponse, error) {
+func (s *Server) Down(ctx context.Context, _ *proto.DownRequest) (*proto.DownResponse, error) {
 	s.mutex.Lock()
 	defer s.mutex.Unlock()
 
@@ -593,7 +593,25 @@ func (s *Server) Down(_ context.Context, _ *proto.DownRequest) (*proto.DownRespo
 	state := internal.CtxGetState(s.rootCtx)
 	state.Set(internal.StatusIdle)
 
-	return &proto.DownResponse{}, nil
+	maxWaitTime := 5 * time.Second
+	timeout := time.After(maxWaitTime)
+
+	engine := s.connectClient.Engine()
+
+	for {
+		if !engine.IsWGIfaceUp() {
+			return &proto.DownResponse{}, nil
+		}
+
+		select {
+		case <-ctx.Done():
+			return &proto.DownResponse{}, nil
+		case <-timeout:
+			return nil, fmt.Errorf("failed to shut down properly")
+		default:
+			time.Sleep(100 * time.Millisecond)
+		}
+	}
 }
 
 // Status returns the daemon status

client/system/info_linux.go

@@ -8,6 +8,7 @@ import (
 	"context"
 	"os"
 	"os/exec"
+	"regexp"
 	"runtime"
 	"strings"
 	"time"
@@ -89,9 +90,17 @@ func _getInfo() string {
 func sysInfo() (serialNumber string, productName string, manufacturer string) {
 	var si sysinfo.SysInfo
 	si.GetSysInfo()
+	isascii := regexp.MustCompile("^[[:ascii:]]+$")
 	serial := si.Chassis.Serial
 	if (serial == "Default string" || serial == "") && si.Product.Serial != "" {
 		serial = si.Product.Serial
 	}
-	return serial, si.Product.Name, si.Product.Vendor
+	if (!isascii.MatchString(serial)) && si.Board.Serial != "" {
+		serial = si.Board.Serial
+	}
+	name := si.Product.Name
+	if (!isascii.MatchString(name)) && si.Board.Name != "" {
+		name = si.Board.Name
+	}
+	return serial, name, si.Product.Vendor
 }

client/ui/client_ui.go

@@ -15,7 +15,6 @@ import (
 	"strconv"
 	"strings"
 	"sync"
-	"syscall"
 	"time"
 	"unicode"
 
@@ -34,6 +33,7 @@ import (
 	"github.com/netbirdio/netbird/client/internal"
 	"github.com/netbirdio/netbird/client/proto"
 	"github.com/netbirdio/netbird/client/system"
+	"github.com/netbirdio/netbird/util"
 	"github.com/netbirdio/netbird/version"
 )
 
@@ -62,8 +62,25 @@ func main() {
 	var errorMSG string
 	flag.StringVar(&errorMSG, "error-msg", "", "displays a error message window")
 
+	tmpDir := "/tmp"
+	if runtime.GOOS == "windows" {
+		tmpDir = os.TempDir()
+	}
+
+	var saveLogsInFile bool
+	flag.BoolVar(&saveLogsInFile, "use-log-file", false, fmt.Sprintf("save logs in a file: %s/netbird-ui-PID.log", tmpDir))
+
 	flag.Parse()
 
+	if saveLogsInFile {
+		logFile := path.Join(tmpDir, fmt.Sprintf("netbird-ui-%d.log", os.Getpid()))
+		err := util.InitLog("trace", logFile)
+		if err != nil {
+			log.Errorf("error while initializing log: %v", err)
+			return
+		}
+	}
+
 	a := app.NewWithID("NetBird")
 	a.SetIcon(fyne.NewStaticResource("netbird", iconDisconnectedPNG))
 
@@ -76,8 +93,12 @@ func main() {
 	if showSettings || showRoutes {
 		a.Run()
 	} else {
-		if err := checkPIDFile(); err != nil {
-			log.Errorf("check PID file: %v", err)
+		running, err := isAnotherProcessRunning()
+		if err != nil {
+			log.Errorf("error while checking process: %v", err)
+		}
+		if running {
+			log.Warn("another process is running")
 			return
 		}
 		client.setDefaultFonts()
@@ -861,104 +882,3 @@ func openURL(url string) error {
 	}
 	return err
 }
-
-// checkPIDFile exists and return error, or write new.
-func checkPIDFile() error {
-	pidFile := path.Join(os.TempDir(), "wiretrustee-ui.pid")
-	if piddata, err := os.ReadFile(pidFile); err == nil {
-		if pid, err := strconv.Atoi(string(piddata)); err == nil {
-			if process, err := os.FindProcess(pid); err == nil {
-				if err := process.Signal(syscall.Signal(0)); err == nil {
-					return fmt.Errorf("process already exists: %d", pid)
-				}
-			}
-		}
-	}
-
-	return os.WriteFile(pidFile, []byte(fmt.Sprintf("%d", os.Getpid())), 0o664) //nolint:gosec
-}
-
-func (s *serviceClient) setDefaultFonts() {
-	var (
-		defaultFontPath string
-	)
-
-	//TODO: Linux Multiple Language Support
-	switch runtime.GOOS {
-	case "darwin":
-		defaultFontPath = "/Library/Fonts/Arial Unicode.ttf"
-	case "windows":
-		fontPath := s.getWindowsFontFilePath()
-		defaultFontPath = fontPath
-	}
-
-	_, err := os.Stat(defaultFontPath)
-
-	if err == nil {
-		os.Setenv("FYNE_FONT", defaultFontPath)
-	}
-}
-
-func (s *serviceClient) getWindowsFontFilePath() (fontPath string) {
-	/*
-		https://learn.microsoft.com/en-us/windows/apps/design/globalizing/loc-international-fonts
-		https://learn.microsoft.com/en-us/typography/fonts/windows_11_font_list
-	*/
-
-	var (
-		fontFolder  string = "C:/Windows/Fonts"
-		fontMapping        = map[string]string{
-			"default":     "Segoeui.ttf",
-			"zh-CN":       "Msyh.ttc",
-			"am-ET":       "Ebrima.ttf",
-			"nirmala":     "Nirmala.ttf",
-			"chr-CHER-US": "Gadugi.ttf",
-			"zh-HK":       "Msjh.ttc",
-			"zh-TW":       "Msjh.ttc",
-			"ja-JP":       "Yugothm.ttc",
-			"km-KH":       "Leelawui.ttf",
-			"ko-KR":       "Malgun.ttf",
-			"th-TH":       "Leelawui.ttf",
-			"ti-ET":       "Ebrima.ttf",
-		}
-		nirMalaLang = []string{
-			"as-IN",
-			"bn-BD",
-			"bn-IN",
-			"gu-IN",
-			"hi-IN",
-			"kn-IN",
-			"kok-IN",
-			"ml-IN",
-			"mr-IN",
-			"ne-NP",
-			"or-IN",
-			"pa-IN",
-			"si-LK",
-			"ta-IN",
-			"te-IN",
-		}
-	)
-	cmd := exec.Command("powershell", "-Command", "(Get-Culture).Name")
-	output, err := cmd.Output()
-	if err != nil {
-		log.Errorf("Failed to get Windows default language setting: %v", err)
-		fontPath = path.Join(fontFolder, fontMapping["default"])
-		return
-	}
-	defaultLanguage := strings.TrimSpace(string(output))
-
-	for _, lang := range nirMalaLang {
-		if defaultLanguage == lang {
-			fontPath = path.Join(fontFolder, fontMapping["nirmala"])
-			return
-		}
-	}
-
-	if font, ok := fontMapping[defaultLanguage]; ok {
-		fontPath = path.Join(fontFolder, font)
-	} else {
-		fontPath = path.Join(fontFolder, fontMapping["default"])
-	}
-	return
-}

client/ui/font_bsd.go

@@ -0,0 +1,26 @@
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd
+
+package main
+
+import (
+	"os"
+	"runtime"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const defaultFontPath = "/Library/Fonts/Arial Unicode.ttf"
+
+func (s *serviceClient) setDefaultFonts() {
+	// TODO: add other bsd paths
+	if runtime.GOOS != "darwin" {
+		return
+	}
+
+	if _, err := os.Stat(defaultFontPath); err != nil {
+		log.Errorf("Failed to find default font file: %v", err)
+		return
+	}
+
+	os.Setenv("FYNE_FONT", defaultFontPath)
+}

client/ui/font_linux.go

@@ -0,0 +1,7 @@
+//go:build !386
+
+package main
+
+func (s *serviceClient) setDefaultFonts() {
+	//TODO: Linux Multiple Language Support
+}

client/ui/font_windows.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"os"
+	"path"
+	"unsafe"
+
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/sys/windows"
+)
+
+func (s *serviceClient) setDefaultFonts() {
+	defaultFontPath := s.getWindowsFontFilePath()
+
+	if _, err := os.Stat(defaultFontPath); err != nil {
+		log.Errorf("Failed to find default font file: %v", err)
+		return
+	}
+
+	os.Setenv("FYNE_FONT", defaultFontPath)
+}
+
+func (s *serviceClient) getWindowsFontFilePath() string {
+	var (
+		fontFolder  = "C:/Windows/Fonts"
+		fontMapping = map[string]string{
+			"default":     "Segoeui.ttf",
+			"zh-CN":       "Msyh.ttc",
+			"am-ET":       "Ebrima.ttf",
+			"nirmala":     "Nirmala.ttf",
+			"chr-CHER-US": "Gadugi.ttf",
+			"zh-HK":       "Msjh.ttc",
+			"zh-TW":       "Msjh.ttc",
+			"ja-JP":       "Yugothm.ttc",
+			"km-KH":       "Leelawui.ttf",
+			"ko-KR":       "Malgun.ttf",
+			"th-TH":       "Leelawui.ttf",
+			"ti-ET":       "Ebrima.ttf",
+		}
+		nirMalaLang = []string{
+			"as-IN",
+			"bn-BD",
+			"bn-IN",
+			"gu-IN",
+			"hi-IN",
+			"kn-IN",
+			"kok-IN",
+			"ml-IN",
+			"mr-IN",
+			"ne-NP",
+			"or-IN",
+			"pa-IN",
+			"si-LK",
+			"ta-IN",
+			"te-IN",
+		}
+	)
+
+	// getUserDefaultLocaleName.Call() panics if the func is not found
+	defer func() {
+		if r := recover(); r != nil {
+			log.Errorf("Recovered from panic: %v", r)
+		}
+	}()
+
+	kernel32 := windows.NewLazySystemDLL("kernel32.dll")
+	getUserDefaultLocaleName := kernel32.NewProc("GetUserDefaultLocaleName")
+
+	buf := make([]uint16, 85) // LOCALE_NAME_MAX_LENGTH is usually 85
+	r, _, err := getUserDefaultLocaleName.Call(uintptr(unsafe.Pointer(&buf[0])), uintptr(len(buf)))
+	// returns 0 on failure, err is always non-nil
+	// https://learn.microsoft.com/en-us/windows/win32/api/winnls/nf-winnls-getuserdefaultlocalename
+	if r == 0 {
+		log.Errorf("GetUserDefaultLocaleName call failed: %v", err)
+		return path.Join(fontFolder, fontMapping["default"])
+	}
+
+	defaultLanguage := windows.UTF16ToString(buf)
+
+	for _, lang := range nirMalaLang {
+		if defaultLanguage == lang {
+			return path.Join(fontFolder, fontMapping["nirmala"])
+		}
+	}
+
+	if font, ok := fontMapping[defaultLanguage]; ok {
+		return path.Join(fontFolder, font)
+	}
+
+	return path.Join(fontFolder, fontMapping["default"])
+}

client/ui/process.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/shirou/gopsutil/v3/process"
+)
+
+func isAnotherProcessRunning() (bool, error) {
+	processes, err := process.Processes()
+	if err != nil {
+		return false, err
+	}
+
+	pid := os.Getpid()
+	processName := strings.ToLower(filepath.Base(os.Args[0]))
+
+	for _, p := range processes {
+		if int(p.Pid) == pid {
+			continue
+		}
+
+		runningProcessPath, err := p.Exe()
+		// most errors are related to short-lived processes
+		if err != nil {
+			continue
+		}
+
+		if strings.Contains(strings.ToLower(runningProcessPath), processName) && isProcessOwnedByCurrentUser(p) {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}

client/ui/process_nonwindows.go

@@ -0,0 +1,26 @@
+//go:build !windows
+
+package main
+
+import (
+	"os"
+
+	"github.com/shirou/gopsutil/v3/process"
+	log "github.com/sirupsen/logrus"
+)
+
+func isProcessOwnedByCurrentUser(p *process.Process) bool {
+	currentUserID := os.Getuid()
+	uids, err := p.Uids()
+	if err != nil {
+		log.Errorf("get process uids: %v", err)
+		return false
+	}
+	for _, id := range uids {
+		log.Debugf("checking process uid: %d", id)
+		if int(id) == currentUserID {
+			return true
+		}
+	}
+	return false
+}

client/ui/process_windows.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"os/user"
+
+	"github.com/shirou/gopsutil/v3/process"
+	log "github.com/sirupsen/logrus"
+)
+
+func isProcessOwnedByCurrentUser(p *process.Process) bool {
+	processUsername, err := p.Username()
+	if err != nil {
+		log.Errorf("get process username error: %v", err)
+		return false
+	}
+
+	currUser, err := user.Current()
+	if err != nil {
+		log.Errorf("get current user error: %v", err)
+		return false
+	}
+
+	return processUsername == currUser.Username
+}