Feature/add iOS support (#1244)

* starting engine by passing file descriptor on engine start

* inject logger that does not compile

* logger and first client

* first working connection

* support for routes and working connection

* small refactor for better code quality in swift

* trying to add DNS

* fix

* updated

* fix route deletion

* trying to bind the DNS resolver dialer to an interface

* use dns.Client.Exchange

* fix metadata send on startup

* switching between client to query upstream

* fix panic on no dns response

* fix after merge changes

* add engine ready listener

* replace engine listener with connection listener

* disable relay connection for iOS until proxy is refactored into bind

* Extract private upstream for iOS and fix function headers for other OS

* Update mock Server

* Fix dns server and upstream tests

* Fix engine null pointer with mobile dependencies for other OS

* Revert back to disabling upstream on no response

* Fix some of the remarks from the linter

* Fix linter

* re-arrange duration calculation

* revert exported HostDNSConfig

* remove unused engine listener

* remove development logs

* refactor dns code and interface name propagation

* clean dns server test

* disable upstream deactivation for iOS

* remove files after merge

* fix dns server darwin

* fix server mock

* fix build flags

* move service listen back to initialize

* add wgInterface to hostManager initialization on android

* fix typo and remove unused function

* extract upstream exchange for ios and rest

* remove todo

* separate upstream logic to ios file

* Fix upstream test

* use interface and embedded struct for upstream

* set properly upstream client

* remove placeholder

* remove ios specific attributes

* fix upstream test

* merge ipc parser and wg configurer for mobile

* fix build annotation

* use json for DNS settings handover through gomobile

* add logs for DNS json string

* bring back check on ios for private upstream

* remove wrong (and unused) line

* fix wrongly updated comments on DNSSetting export

---------

Co-authored-by: Maycon Santos <mlsmaycon@gmail.com>

client/internal/connect.go

@@ -43,6 +43,15 @@ func RunClientMobile(ctx context.Context, config *Config, statusRecorder *peer.S
 	return runClient(ctx, config, statusRecorder, mobileDependency)
 }
 
+func RunClientiOS(ctx context.Context, config *Config, statusRecorder *peer.Status, fileDescriptor int32, networkChangeListener listener.NetworkChangeListener, dnsManager dns.IosDnsManager) error {
+	mobileDependency := MobileDependency{
+		FileDescriptor:        fileDescriptor,
+		NetworkChangeListener: networkChangeListener,
+		DnsManager:            dnsManager,
+	}
+	return runClient(ctx, config, statusRecorder, mobileDependency)
+}
+
 func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status, mobileDependency MobileDependency) error {
 	log.Infof("starting NetBird client version %s", version.NetbirdVersion())
 

client/internal/dns/file_linux.go

@@ -35,14 +35,14 @@ func (f *fileConfigurator) supportCustomPort() bool {
 	return false
 }
 
-func (f *fileConfigurator) applyDNSConfig(config hostDNSConfig) error {
+func (f *fileConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	backupFileExist := false
 	_, err := os.Stat(fileDefaultResolvConfBackupLocation)
 	if err == nil {
 		backupFileExist = true
 	}
 
-	if !config.routeAll {
+	if !config.RouteAll {
 		if backupFileExist {
 			err = f.restore()
 			if err != nil {
@@ -70,7 +70,7 @@ func (f *fileConfigurator) applyDNSConfig(config hostDNSConfig) error {
 
 	buf := prepareResolvConfContent(
 		searchDomainList,
-		append([]string{config.serverIP}, nameServers...),
+		append([]string{config.ServerIP}, nameServers...),
 		others)
 
 	log.Debugf("creating managed file %s", defaultResolvConfPath)
@@ -138,14 +138,14 @@ func prepareResolvConfContent(searchDomains, nameServers, others []string) bytes
 	return buf
 }
 
-func searchDomains(config hostDNSConfig) []string {
+func searchDomains(config HostDNSConfig) []string {
 	listOfDomains := make([]string, 0)
-	for _, dConf := range config.domains {
+	for _, dConf := range config.Domains {
-		if dConf.matchOnly || dConf.disabled {
+		if dConf.MatchOnly || dConf.Disabled {
 			continue
 		}
 
-		listOfDomains = append(listOfDomains, dConf.domain)
+		listOfDomains = append(listOfDomains, dConf.Domain)
 	}
 	return listOfDomains
 }
@@ -214,7 +214,7 @@ func originalDNSConfigs(resolvconfFile string) (searchDomains, nameServers, othe
 	return
 }
 
-// merge search domains lists and cut off the list if it is too long
+// merge search Domains lists and cut off the list if it is too long
 func mergeSearchDomains(searchDomains []string, originalSearchDomains []string) []string {
 	lineSize := len("search")
 	searchDomainsList := make([]string, 0, len(searchDomains)+len(originalSearchDomains))
@@ -225,14 +225,14 @@ func mergeSearchDomains(searchDomains []string, originalSearchDomains []string)
 	return searchDomainsList
 }
 
-// validateAndFillSearchDomains checks if the search domains list is not too long and if the line is not too long
+// validateAndFillSearchDomains checks if the search Domains list is not too long and if the line is not too long
 // extend s slice with vs elements
 // return with the number of characters in the searchDomains line
 func validateAndFillSearchDomains(initialLineChars int, s *[]string, vs []string) int {
 	for _, sd := range vs {
 		tmpCharsNumber := initialLineChars + 1 + len(sd)
 		if tmpCharsNumber > fileMaxLineCharsLimit {
-			// lets log all skipped domains
+			// lets log all skipped Domains
 			log.Infof("search list line is larger than %d characters. Skipping append of %s domain", fileMaxLineCharsLimit, sd)
 			continue
 		}
@@ -240,7 +240,7 @@ func validateAndFillSearchDomains(initialLineChars int, s *[]string, vs []string
 		initialLineChars = tmpCharsNumber
 
 		if len(*s) >= fileMaxNumberOfSearchDomains {
-			// lets log all skipped domains
+			// lets log all skipped Domains
 			log.Infof("already appended %d domains to search list. Skipping append of %s domain", fileMaxNumberOfSearchDomains, sd)
 			continue
 		}

client/internal/dns/host.go

@@ -8,31 +8,31 @@ import (
 )
 
 type hostManager interface {
-	applyDNSConfig(config hostDNSConfig) error
+	applyDNSConfig(config HostDNSConfig) error
 	restoreHostDNS() error
 	supportCustomPort() bool
 }
 
-type hostDNSConfig struct {
+type HostDNSConfig struct {
-	domains    []domainConfig
+	Domains    []DomainConfig `json:"domains"`
-	routeAll   bool
+	RouteAll   bool           `json:"routeAll"`
-	serverIP   string
+	ServerIP   string         `json:"serverIP"`
-	serverPort int
+	ServerPort int            `json:"serverPort"`
 }
 
-type domainConfig struct {
+type DomainConfig struct {
-	disabled  bool
+	Disabled  bool   `json:"disabled"`
-	domain    string
+	Domain    string `json:"domain"`
-	matchOnly bool
+	MatchOnly bool   `json:"matchOnly"`
 }
 
 type mockHostConfigurator struct {
-	applyDNSConfigFunc    func(config hostDNSConfig) error
+	applyDNSConfigFunc    func(config HostDNSConfig) error
 	restoreHostDNSFunc    func() error
 	supportCustomPortFunc func() bool
 }
 
-func (m *mockHostConfigurator) applyDNSConfig(config hostDNSConfig) error {
+func (m *mockHostConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	if m.applyDNSConfigFunc != nil {
 		return m.applyDNSConfigFunc(config)
 	}
@@ -55,38 +55,38 @@ func (m *mockHostConfigurator) supportCustomPort() bool {
 
 func newNoopHostMocker() hostManager {
 	return &mockHostConfigurator{
-		applyDNSConfigFunc:    func(config hostDNSConfig) error { return nil },
+		applyDNSConfigFunc:    func(config HostDNSConfig) error { return nil },
 		restoreHostDNSFunc:    func() error { return nil },
 		supportCustomPortFunc: func() bool { return true },
 	}
 }
 
-func dnsConfigToHostDNSConfig(dnsConfig nbdns.Config, ip string, port int) hostDNSConfig {
+func dnsConfigToHostDNSConfig(dnsConfig nbdns.Config, ip string, port int) HostDNSConfig {
-	config := hostDNSConfig{
+	config := HostDNSConfig{
-		routeAll:   false,
+		RouteAll:   false,
-		serverIP:   ip,
+		ServerIP:   ip,
-		serverPort: port,
+		ServerPort: port,
 	}
 	for _, nsConfig := range dnsConfig.NameServerGroups {
 		if len(nsConfig.NameServers) == 0 {
 			continue
 		}
 		if nsConfig.Primary {
-			config.routeAll = true
+			config.RouteAll = true
 		}
 
 		for _, domain := range nsConfig.Domains {
-			config.domains = append(config.domains, domainConfig{
+			config.Domains = append(config.Domains, DomainConfig{
-				domain:    strings.TrimSuffix(domain, "."),
+				Domain:    strings.TrimSuffix(domain, "."),
-				matchOnly: !nsConfig.SearchDomainsEnabled,
+				MatchOnly: !nsConfig.SearchDomainsEnabled,
 			})
 		}
 	}
 
 	for _, customZone := range dnsConfig.CustomZones {
-		config.domains = append(config.domains, domainConfig{
+		config.Domains = append(config.Domains, DomainConfig{
-			domain:    strings.TrimSuffix(customZone.Domain, "."),
+			Domain:    strings.TrimSuffix(customZone.Domain, "."),
-			matchOnly: false,
+			MatchOnly: false,
 		})
 	}
 

client/internal/dns/host_android.go

@@ -7,7 +7,7 @@ func newHostManager(wgInterface WGIface) (hostManager, error) {
 	return &androidHostManager{}, nil
 }
 
-func (a androidHostManager) applyDNSConfig(config hostDNSConfig) error {
+func (a androidHostManager) applyDNSConfig(config HostDNSConfig) error {
 	return nil
 }
 

client/internal/dns/host_darwin.go

@@ -1,3 +1,5 @@
+//go:build !ios
+
 package dns
 
 import (
@@ -42,11 +44,11 @@ func (s *systemConfigurator) supportCustomPort() bool {
 	return true
 }
 
-func (s *systemConfigurator) applyDNSConfig(config hostDNSConfig) error {
+func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	var err error
 
-	if config.routeAll {
+	if config.RouteAll {
-		err = s.addDNSSetupForAll(config.serverIP, config.serverPort)
+		err = s.addDNSSetupForAll(config.ServerIP, config.ServerPort)
 		if err != nil {
 			return err
 		}
@@ -56,7 +58,7 @@ func (s *systemConfigurator) applyDNSConfig(config hostDNSConfig) error {
 			return err
 		}
 		s.primaryServiceID = ""
-		log.Infof("removed %s:%d as main DNS resolver for this peer", config.serverIP, config.serverPort)
+		log.Infof("removed %s:%d as main DNS resolver for this peer", config.ServerIP, config.ServerPort)
 	}
 
 	var (
@@ -64,20 +66,20 @@ func (s *systemConfigurator) applyDNSConfig(config hostDNSConfig) error {
 		matchDomains  []string
 	)
 
-	for _, dConf := range config.domains {
+	for _, dConf := range config.Domains {
-		if dConf.disabled {
+		if dConf.Disabled {
 			continue
 		}
-		if dConf.matchOnly {
+		if dConf.MatchOnly {
-			matchDomains = append(matchDomains, dConf.domain)
+			matchDomains = append(matchDomains, dConf.Domain)
 			continue
 		}
-		searchDomains = append(searchDomains, dConf.domain)
+		searchDomains = append(searchDomains, dConf.Domain)
 	}
 
 	matchKey := getKeyWithInput(netbirdDNSStateKeyFormat, matchSuffix)
 	if len(matchDomains) != 0 {
-		err = s.addMatchDomains(matchKey, strings.Join(matchDomains, " "), config.serverIP, config.serverPort)
+		err = s.addMatchDomains(matchKey, strings.Join(matchDomains, " "), config.ServerIP, config.ServerPort)
 	} else {
 		log.Infof("removing match domains from the system")
 		err = s.removeKeyFromSystemConfig(matchKey)
@@ -88,7 +90,7 @@ func (s *systemConfigurator) applyDNSConfig(config hostDNSConfig) error {
 
 	searchKey := getKeyWithInput(netbirdDNSStateKeyFormat, searchSuffix)
 	if len(searchDomains) != 0 {
-		err = s.addSearchDomains(searchKey, strings.Join(searchDomains, " "), config.serverIP, config.serverPort)
+		err = s.addSearchDomains(searchKey, strings.Join(searchDomains, " "), config.ServerIP, config.ServerPort)
 	} else {
 		log.Infof("removing search domains from the system")
 		err = s.removeKeyFromSystemConfig(searchKey)

client/internal/dns/host_ios.go

@@ -0,0 +1,37 @@
+package dns
+
+import (
+	"encoding/json"
+
+	log "github.com/sirupsen/logrus"
+)
+
+type iosHostManager struct {
+	dnsManager IosDnsManager
+	config     HostDNSConfig
+}
+
+func newHostManager(dnsManager IosDnsManager) (hostManager, error) {
+	return &iosHostManager{
+		dnsManager: dnsManager,
+	}, nil
+}
+
+func (a iosHostManager) applyDNSConfig(config HostDNSConfig) error {
+	jsonData, err := json.Marshal(config)
+	if err != nil {
+		return err
+	}
+	jsonString := string(jsonData)
+	log.Debugf("Applying DNS settings: %s", jsonString)
+	a.dnsManager.ApplyDns(jsonString)
+	return nil
+}
+
+func (a iosHostManager) restoreHostDNS() error {
+	return nil
+}
+
+func (a iosHostManager) supportCustomPort() bool {
+	return false
+}

client/internal/dns/host_windows.go

@@ -43,10 +43,10 @@ func (s *registryConfigurator) supportCustomPort() bool {
 	return false
 }
 
-func (r *registryConfigurator) applyDNSConfig(config hostDNSConfig) error {
+func (r *registryConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	var err error
-	if config.routeAll {
+	if config.RouteAll {
-		err = r.addDNSSetupForAll(config.serverIP)
+		err = r.addDNSSetupForAll(config.ServerIP)
 		if err != nil {
 			return err
 		}
@@ -56,7 +56,7 @@ func (r *registryConfigurator) applyDNSConfig(config hostDNSConfig) error {
 			return err
 		}
 		r.routingAll = false
-		log.Infof("removed %s as main DNS forwarder for this peer", config.serverIP)
+		log.Infof("removed %s as main DNS forwarder for this peer", config.ServerIP)
 	}
 
 	var (
@@ -64,18 +64,18 @@ func (r *registryConfigurator) applyDNSConfig(config hostDNSConfig) error {
 		matchDomains  []string
 	)
 
-	for _, dConf := range config.domains {
+	for _, dConf := range config.Domains {
-		if dConf.disabled {
+		if dConf.Disabled {
 			continue
 		}
-		if !dConf.matchOnly {
+		if !dConf.MatchOnly {
-			searchDomains = append(searchDomains, dConf.domain)
+			searchDomains = append(searchDomains, dConf.Domain)
 		}
-		matchDomains = append(matchDomains, "."+dConf.domain)
+		matchDomains = append(matchDomains, "."+dConf.Domain)
 	}
 
 	if len(matchDomains) != 0 {
-		err = r.addDNSMatchPolicy(matchDomains, config.serverIP)
+		err = r.addDNSMatchPolicy(matchDomains, config.ServerIP)
 	} else {
 		err = removeRegistryKeyFromDNSPolicyConfig(dnsPolicyConfigMatchPath)
 	}

client/internal/dns/local_test.go

@@ -1,10 +1,12 @@
 package dns
 
 import (
-	"github.com/miekg/dns"
-	nbdns "github.com/netbirdio/netbird/dns"
 	"strings"
 	"testing"
+
+	"github.com/miekg/dns"
+
+	nbdns "github.com/netbirdio/netbird/dns"
 )
 
 func TestLocalResolver_ServeDNS(t *testing.T) {

client/internal/dns/mock_server.go

@@ -33,7 +33,7 @@ func (m *MockServer) DnsIP() string {
 }
 
 func (m *MockServer) OnUpdatedHostDNSServer(strings []string) {
-	//TODO implement me
+	// TODO implement me
 	panic("implement me")
 }
 

client/internal/dns/network_manager_linux.go

@@ -12,8 +12,9 @@ import (
 	"github.com/godbus/dbus/v5"
 	"github.com/hashicorp/go-version"
 	"github.com/miekg/dns"
-	nbversion "github.com/netbirdio/netbird/version"
 	log "github.com/sirupsen/logrus"
+
+	nbversion "github.com/netbirdio/netbird/version"
 )
 
 const (
@@ -93,7 +94,7 @@ func (n *networkManagerDbusConfigurator) supportCustomPort() bool {
 	return false
 }
 
-func (n *networkManagerDbusConfigurator) applyDNSConfig(config hostDNSConfig) error {
+func (n *networkManagerDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	connSettings, configVersion, err := n.getAppliedConnectionSettings()
 	if err != nil {
 		return fmt.Errorf("got an error while retrieving the applied connection settings, error: %s", err)
@@ -101,7 +102,7 @@ func (n *networkManagerDbusConfigurator) applyDNSConfig(config hostDNSConfig) er
 
 	connSettings.cleanDeprecatedSettings()
 
-	dnsIP, err := netip.ParseAddr(config.serverIP)
+	dnsIP, err := netip.ParseAddr(config.ServerIP)
 	if err != nil {
 		return fmt.Errorf("unable to parse ip address, error: %s", err)
 	}
@@ -111,33 +112,33 @@ func (n *networkManagerDbusConfigurator) applyDNSConfig(config hostDNSConfig) er
 		searchDomains []string
 		matchDomains  []string
 	)
-	for _, dConf := range config.domains {
+	for _, dConf := range config.Domains {
-		if dConf.disabled {
+		if dConf.Disabled {
 			continue
 		}
-		if dConf.matchOnly {
+		if dConf.MatchOnly {
-			matchDomains = append(matchDomains, "~."+dns.Fqdn(dConf.domain))
+			matchDomains = append(matchDomains, "~."+dns.Fqdn(dConf.Domain))
 			continue
 		}
-		searchDomains = append(searchDomains, dns.Fqdn(dConf.domain))
+		searchDomains = append(searchDomains, dns.Fqdn(dConf.Domain))
 	}
 
 	newDomainList := append(searchDomains, matchDomains...) //nolint:gocritic
 
 	priority := networkManagerDbusSearchDomainOnlyPriority
 	switch {
-	case config.routeAll:
+	case config.RouteAll:
 		priority = networkManagerDbusPrimaryDNSPriority
 		newDomainList = append(newDomainList, "~.")
 		if !n.routingAll {
-			log.Infof("configured %s:%d as main DNS forwarder for this peer", config.serverIP, config.serverPort)
+			log.Infof("configured %s:%d as main DNS forwarder for this peer", config.ServerIP, config.ServerPort)
 		}
 	case len(matchDomains) > 0:
 		priority = networkManagerDbusWithMatchDomainPriority
 	}
 
 	if priority != networkManagerDbusPrimaryDNSPriority && n.routingAll {
-		log.Infof("removing %s:%d as main DNS forwarder for this peer", config.serverIP, config.serverPort)
+		log.Infof("removing %s:%d as main DNS forwarder for this peer", config.ServerIP, config.ServerPort)
 		n.routingAll = false
 	}
 

client/internal/dns/notifier.go

@@ -52,6 +52,6 @@ func (n *notifier) notify() {
 	}
 
 	go func(l listener.NetworkChangeListener) {
-		l.OnNetworkChanged()
+		l.OnNetworkChanged("")
 	}(n.listener)
 }

client/internal/dns/resolvconf_linux.go

@@ -39,9 +39,9 @@ func (r *resolvconf) supportCustomPort() bool {
 	return false
 }
 
-func (r *resolvconf) applyDNSConfig(config hostDNSConfig) error {
+func (r *resolvconf) applyDNSConfig(config HostDNSConfig) error {
 	var err error
-	if !config.routeAll {
+	if !config.RouteAll {
 		err = r.restoreHostDNS()
 		if err != nil {
 			log.Error(err)
@@ -54,7 +54,7 @@ func (r *resolvconf) applyDNSConfig(config hostDNSConfig) error {
 
 	buf := prepareResolvConfContent(
 		searchDomainList,
-		append([]string{config.serverIP}, r.originalNameServers...),
+		append([]string{config.ServerIP}, r.originalNameServers...),
 		r.othersConfigs)
 
 	err = r.applyConfig(buf)

client/internal/dns/server.go

@@ -19,6 +19,11 @@ type ReadyListener interface {
 	OnReady()
 }
 
+// IosDnsManager is a dns manager interface for iOS
+type IosDnsManager interface {
+	ApplyDns(string)
+}
+
 // Server is a dns server interface
 type Server interface {
 	Initialize() error
@@ -43,7 +48,7 @@ type DefaultServer struct {
 	hostManager        hostManager
 	updateSerial       uint64
 	previousConfigHash uint64
-	currentConfig      hostDNSConfig
+	currentConfig      HostDNSConfig
 
 	// permanent related properties
 	permanent        bool
@@ -52,6 +57,7 @@ type DefaultServer struct {
 
 	// make sense on mobile only
 	searchDomainNotifier *notifier
+	iosDnsManager        IosDnsManager
 }
 
 type handlerWithStop interface {
@@ -99,6 +105,13 @@ func NewDefaultServerPermanentUpstream(ctx context.Context, wgInterface WGIface,
 	return ds
 }
 
+// NewDefaultServerIos returns a new dns server. It optimized for ios
+func NewDefaultServerIos(ctx context.Context, wgInterface WGIface, iosDnsManager IosDnsManager) *DefaultServer {
+	ds := newDefaultServer(ctx, wgInterface, newServiceViaMemory(wgInterface))
+	ds.iosDnsManager = iosDnsManager
+	return ds
+}
+
 func newDefaultServer(ctx context.Context, wgInterface WGIface, dnsService service) *DefaultServer {
 	ctx, stop := context.WithCancel(ctx)
 	defaultServer := &DefaultServer{
@@ -131,8 +144,8 @@ func (s *DefaultServer) Initialize() (err error) {
 		}
 	}
 
-	s.hostManager, err = newHostManager(s.wgInterface)
+	s.hostManager, err = s.initialize()
-	return
+	return err
 }
 
 // DnsIP returns the DNS resolver server IP address
@@ -223,20 +236,20 @@ func (s *DefaultServer) UpdateDNSServer(serial uint64, update nbdns.Config) erro
 func (s *DefaultServer) SearchDomains() []string {
 	var searchDomains []string
 
-	for _, dConf := range s.currentConfig.domains {
+	for _, dConf := range s.currentConfig.Domains {
-		if dConf.disabled {
+		if dConf.Disabled {
 			continue
 		}
-		if dConf.matchOnly {
+		if dConf.MatchOnly {
 			continue
 		}
-		searchDomains = append(searchDomains, dConf.domain)
+		searchDomains = append(searchDomains, dConf.Domain)
 	}
 	return searchDomains
 }
 
 func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
-	// is the service should be disabled, we stop the listener or fake resolver
+	// is the service should be Disabled, we stop the listener or fake resolver
 	// and proceed with a regular update to clean up the handlers and records
 	if update.ServiceEnable {
 		_ = s.service.Listen()
@@ -262,7 +275,7 @@ func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
 	if s.service.RuntimePort() != defaultPort && !s.hostManager.supportCustomPort() {
 		log.Warnf("the DNS manager of this peer doesn't support custom port. Disabling primary DNS setup. " +
 			"Learn more at: https://docs.netbird.io/how-to/manage-dns-in-your-network#local-resolver")
-		hostUpdate.routeAll = false
+		hostUpdate.RouteAll = false
 	}
 
 	if err = s.hostManager.applyDNSConfig(hostUpdate); err != nil {
@@ -312,7 +325,10 @@ func (s *DefaultServer) buildUpstreamHandlerUpdate(nameServerGroups []*nbdns.Nam
 			continue
 		}
 
-		handler := newUpstreamResolver(s.ctx)
+		handler, err := newUpstreamResolver(s.ctx, s.wgInterface.Name(), s.wgInterface.Address().IP, s.wgInterface.Address().Network)
+		if err != nil {
+			return nil, fmt.Errorf("unable to create a new upstream resolver, error: %v", err)
+		}
 		for _, ns := range nsGroup.NameServers {
 			if ns.NSType != nbdns.UDPNameServerType {
 				log.Warnf("skipping nameserver %s with type %s, this peer supports only %s",
@@ -445,14 +461,14 @@ func (s *DefaultServer) upstreamCallbacks(
 		}
 		if nsGroup.Primary {
 			removeIndex[nbdns.RootZone] = -1
-			s.currentConfig.routeAll = false
+			s.currentConfig.RouteAll = false
 		}
 
-		for i, item := range s.currentConfig.domains {
+		for i, item := range s.currentConfig.Domains {
-			if _, found := removeIndex[item.domain]; found {
+			if _, found := removeIndex[item.Domain]; found {
-				s.currentConfig.domains[i].disabled = true
+				s.currentConfig.Domains[i].Disabled = true
-				s.service.DeregisterMux(item.domain)
+				s.service.DeregisterMux(item.Domain)
-				removeIndex[item.domain] = i
+				removeIndex[item.Domain] = i
 			}
 		}
 		if err := s.hostManager.applyDNSConfig(s.currentConfig); err != nil {
@@ -464,28 +480,32 @@ func (s *DefaultServer) upstreamCallbacks(
 		defer s.mux.Unlock()
 
 		for domain, i := range removeIndex {
-			if i == -1 || i >= len(s.currentConfig.domains) || s.currentConfig.domains[i].domain != domain {
+			if i == -1 || i >= len(s.currentConfig.Domains) || s.currentConfig.Domains[i].Domain != domain {
 				continue
 			}
-			s.currentConfig.domains[i].disabled = false
+			s.currentConfig.Domains[i].Disabled = false
 			s.service.RegisterMux(domain, handler)
 		}
 
 		l := log.WithField("nameservers", nsGroup.NameServers)
-		l.Debug("reactivate temporary disabled nameserver group")
+		l.Debug("reactivate temporary Disabled nameserver group")
 
 		if nsGroup.Primary {
-			s.currentConfig.routeAll = true
+			s.currentConfig.RouteAll = true
 		}
 		if err := s.hostManager.applyDNSConfig(s.currentConfig); err != nil {
-			l.WithError(err).Error("reactivate temporary disabled nameserver group, DNS update apply")
+			l.WithError(err).Error("reactivate temporary Disabled nameserver group, DNS update apply")
 		}
 	}
 	return
 }
 
 func (s *DefaultServer) addHostRootZone() {
-	handler := newUpstreamResolver(s.ctx)
+	handler, err := newUpstreamResolver(s.ctx, s.wgInterface.Name(), s.wgInterface.Address().IP, s.wgInterface.Address().Network)
+	if err != nil {
+		log.Errorf("unable to create a new upstream resolver, error: %v", err)
+		return
+	}
 	handler.upstreamServers = make([]string, len(s.hostsDnsList))
 	for n, ua := range s.hostsDnsList {
 		a, err := netip.ParseAddr(ua)

client/internal/dns/server_android.go

@@ -0,0 +1,5 @@
+package dns
+
+func (s *DefaultServer) initialize() (manager hostManager, err error) {
+	return newHostManager(s.wgInterface)
+}

client/internal/dns/server_darwin.go

@@ -0,0 +1,7 @@
+//go:build !ios
+
+package dns
+
+func (s *DefaultServer) initialize() (manager hostManager, err error) {
+	return newHostManager(s.wgInterface)
+}

client/internal/dns/server_ios.go

@@ -0,0 +1,5 @@
+package dns
+
+func (s *DefaultServer) initialize() (manager hostManager, err error) {
+	return newHostManager(s.iosDnsManager)
+}

client/internal/dns/server_linux.go

@@ -0,0 +1,7 @@
+//go:build !android
+
+package dns
+
+func (s *DefaultServer) initialize() (manager hostManager, err error) {
+	return newHostManager(s.wgInterface)
+}

client/internal/dns/server_test.go

@@ -527,8 +527,8 @@ func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 			registeredMap: make(registrationMap),
 		},
 		hostManager: hostManager,
-		currentConfig: hostDNSConfig{
+		currentConfig: HostDNSConfig{
-			domains: []domainConfig{
+			Domains: []DomainConfig{
 				{false, "domain0", false},
 				{false, "domain1", false},
 				{false, "domain2", false},
@@ -537,13 +537,13 @@ func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 	}
 
 	var domainsUpdate string
-	hostManager.applyDNSConfigFunc = func(config hostDNSConfig) error {
+	hostManager.applyDNSConfigFunc = func(config HostDNSConfig) error {
 		domains := []string{}
-		for _, item := range config.domains {
+		for _, item := range config.Domains {
-			if item.disabled {
+			if item.Disabled {
 				continue
 			}
-			domains = append(domains, item.domain)
+			domains = append(domains, item.Domain)
 		}
 		domainsUpdate = strings.Join(domains, ",")
 		return nil
@@ -559,11 +559,11 @@ func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 	deactivate()
 	expected := "domain0,domain2"
 	domains := []string{}
-	for _, item := range server.currentConfig.domains {
+	for _, item := range server.currentConfig.Domains {
-		if item.disabled {
+		if item.Disabled {
 			continue
 		}
-		domains = append(domains, item.domain)
+		domains = append(domains, item.Domain)
 	}
 	got := strings.Join(domains, ",")
 	if expected != got {
@@ -573,11 +573,11 @@ func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 	reactivate()
 	expected = "domain0,domain1,domain2"
 	domains = []string{}
-	for _, item := range server.currentConfig.domains {
+	for _, item := range server.currentConfig.Domains {
-		if item.disabled {
+		if item.Disabled {
 			continue
 		}
-		domains = append(domains, item.domain)
+		domains = append(domains, item.Domain)
 	}
 	got = strings.Join(domains, ",")
 	if expected != got {

client/internal/dns/server_windows.go

@@ -0,0 +1,5 @@
+package dns
+
+func (s *DefaultServer) initialize() (manager hostManager, err error) {
+	return newHostManager(s.wgInterface)
+}

client/internal/dns/systemd_linux.go

@@ -81,8 +81,8 @@ func (s *systemdDbusConfigurator) supportCustomPort() bool {
 	return true
 }
 
-func (s *systemdDbusConfigurator) applyDNSConfig(config hostDNSConfig) error {
+func (s *systemdDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
-	parsedIP, err := netip.ParseAddr(config.serverIP)
+	parsedIP, err := netip.ParseAddr(config.ServerIP)
 	if err != nil {
 		return fmt.Errorf("unable to parse ip address, error: %s", err)
 	}
@@ -93,7 +93,7 @@ func (s *systemdDbusConfigurator) applyDNSConfig(config hostDNSConfig) error {
 	}
 	err = s.callLinkMethod(systemdDbusSetDNSMethodSuffix, []systemdDbusDNSInput{defaultLinkInput})
 	if err != nil {
-		return fmt.Errorf("setting the interface DNS server %s:%d failed with error: %s", config.serverIP, config.serverPort, err)
+		return fmt.Errorf("setting the interface DNS server %s:%d failed with error: %s", config.ServerIP, config.ServerPort, err)
 	}
 
 	var (
@@ -101,24 +101,24 @@ func (s *systemdDbusConfigurator) applyDNSConfig(config hostDNSConfig) error {
 		matchDomains  []string
 		domainsInput  []systemdDbusLinkDomainsInput
 	)
-	for _, dConf := range config.domains {
+	for _, dConf := range config.Domains {
-		if dConf.disabled {
+		if dConf.Disabled {
 			continue
 		}
 		domainsInput = append(domainsInput, systemdDbusLinkDomainsInput{
-			Domain:    dns.Fqdn(dConf.domain),
+			Domain:    dns.Fqdn(dConf.Domain),
-			MatchOnly: dConf.matchOnly,
+			MatchOnly: dConf.MatchOnly,
 		})
 
-		if dConf.matchOnly {
+		if dConf.MatchOnly {
-			matchDomains = append(matchDomains, dConf.domain)
+			matchDomains = append(matchDomains, dConf.Domain)
 			continue
 		}
-		searchDomains = append(searchDomains, dConf.domain)
+		searchDomains = append(searchDomains, dConf.Domain)
 	}
 
-	if config.routeAll {
+	if config.RouteAll {
-		log.Infof("configured %s:%d as main DNS forwarder for this peer", config.serverIP, config.serverPort)
+		log.Infof("configured %s:%d as main DNS forwarder for this peer", config.ServerIP, config.ServerPort)
 		err = s.callLinkMethod(systemdDbusSetDefaultRouteMethodSuffix, true)
 		if err != nil {
 			return fmt.Errorf("setting link as default dns router, failed with error: %s", err)
@@ -129,7 +129,7 @@ func (s *systemdDbusConfigurator) applyDNSConfig(config hostDNSConfig) error {
 		})
 		s.routingAll = true
 	} else if s.routingAll {
-		log.Infof("removing %s:%d as main DNS forwarder for this peer", config.serverIP, config.serverPort)
+		log.Infof("removing %s:%d as main DNS forwarder for this peer", config.ServerIP, config.ServerPort)
 	}
 
 	log.Infof("adding %d search domains and %d match domains. Search list: %s , Match list: %s", len(searchDomains), len(matchDomains), searchDomains, matchDomains)

client/internal/dns/upstream.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"net"
+	"runtime"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -21,10 +22,15 @@ const (
 )
 
 type upstreamClient interface {
-	ExchangeContext(ctx context.Context, m *dns.Msg, a string) (r *dns.Msg, rtt time.Duration, err error)
+	exchange(upstream string, r *dns.Msg) (*dns.Msg, time.Duration, error)
 }
 
-type upstreamResolver struct {
+type UpstreamResolver interface {
+	serveDNS(r *dns.Msg) (*dns.Msg, time.Duration, error)
+	upstreamExchange(upstream string, r *dns.Msg) (*dns.Msg, time.Duration, error)
+}
+
+type upstreamResolverBase struct {
 	ctx              context.Context
 	cancel           context.CancelFunc
 	upstreamClient   upstreamClient
@@ -40,25 +46,25 @@ type upstreamResolver struct {
 	reactivate func()
 }
 
-func newUpstreamResolver(parentCTX context.Context) *upstreamResolver {
+func newUpstreamResolverBase(parentCTX context.Context) *upstreamResolverBase {
 	ctx, cancel := context.WithCancel(parentCTX)
-	return &upstreamResolver{
+
+	return &upstreamResolverBase{
 		ctx:              ctx,
 		cancel:           cancel,
-		upstreamClient:   &dns.Client{},
 		upstreamTimeout:  upstreamTimeout,
 		reactivatePeriod: reactivatePeriod,
 		failsTillDeact:   failsTillDeact,
 	}
 }
 
-func (u *upstreamResolver) stop() {
+func (u *upstreamResolverBase) stop() {
 	log.Debugf("stopping serving DNS for upstreams %s", u.upstreamServers)
 	u.cancel()
 }
 
 // ServeDNS handles a DNS request
-func (u *upstreamResolver) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
+func (u *upstreamResolverBase) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 	defer u.checkUpstreamFails()
 
 	log.WithField("question", r.Question[0]).Trace("received an upstream question")
@@ -70,10 +76,8 @@ func (u *upstreamResolver) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 	}
 
 	for _, upstream := range u.upstreamServers {
-		ctx, cancel := context.WithTimeout(u.ctx, u.upstreamTimeout)
-		rm, t, err := u.upstreamClient.ExchangeContext(ctx, r, upstream)
 
-		cancel()
+		rm, t, err := u.upstreamClient.exchange(upstream, r)
 
 		if err != nil {
 			if err == context.DeadlineExceeded || isTimeout(err) {
@@ -83,7 +87,19 @@ func (u *upstreamResolver) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 			}
 			u.failsCount.Add(1)
 			log.WithError(err).WithField("upstream", upstream).
-				Error("got an error while querying the upstream")
+				Error("got other error while querying the upstream")
+			return
+		}
+
+		if rm == nil {
+			log.WithError(err).WithField("upstream", upstream).
+				Warn("no response from upstream")
+			return
+		}
+		// those checks need to be independent of each other due to memory address issues
+		if !rm.Response {
+			log.WithError(err).WithField("upstream", upstream).
+				Warn("no response from upstream")
 			return
 		}
 
@@ -106,7 +122,7 @@ func (u *upstreamResolver) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 // If fails count is greater that failsTillDeact, upstream resolving
 // will be disabled for reactivatePeriod, after that time period fails counter
 // will be reset and upstream will be reactivated.
-func (u *upstreamResolver) checkUpstreamFails() {
+func (u *upstreamResolverBase) checkUpstreamFails() {
 	u.mutex.Lock()
 	defer u.mutex.Unlock()
 
@@ -118,15 +134,18 @@ func (u *upstreamResolver) checkUpstreamFails() {
 	case <-u.ctx.Done():
 		return
 	default:
-		log.Warnf("upstream resolving is disabled for %v", reactivatePeriod)
+		// todo test the deactivation logic, it seems to affect the client
-		u.deactivate()
+		if runtime.GOOS != "ios" {
-		u.disabled = true
+			log.Warnf("upstream resolving is Disabled for %v", reactivatePeriod)
-		go u.waitUntilResponse()
+			u.deactivate()
+			u.disabled = true
+			go u.waitUntilResponse()
+		}
 	}
 }
 
 // waitUntilResponse retries, in an exponential interval, querying the upstream servers until it gets a positive response
-func (u *upstreamResolver) waitUntilResponse() {
+func (u *upstreamResolverBase) waitUntilResponse() {
 	exponentialBackOff := &backoff.ExponentialBackOff{
 		InitialInterval:     500 * time.Millisecond,
 		RandomizationFactor: 0.5,
@@ -148,10 +167,7 @@ func (u *upstreamResolver) waitUntilResponse() {
 
 		var err error
 		for _, upstream := range u.upstreamServers {
-			ctx, cancel := context.WithTimeout(u.ctx, u.upstreamTimeout)
+			_, _, err = u.upstreamClient.exchange(upstream, r)
-			_, _, err = u.upstreamClient.ExchangeContext(ctx, r, upstream)
-
-			cancel()
 
 			if err == nil {
 				return nil

client/internal/dns/upstream_ios.go

@@ -0,0 +1,93 @@
+//go:build ios
+
+package dns
+
+import (
+	"context"
+	"net"
+	"syscall"
+	"time"
+
+	"github.com/miekg/dns"
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/sys/unix"
+)
+
+type upstreamResolverIOS struct {
+	*upstreamResolverBase
+	lIP    net.IP
+	lNet   *net.IPNet
+	iIndex int
+}
+
+func newUpstreamResolver(parentCTX context.Context, interfaceName string, ip net.IP, net *net.IPNet) (*upstreamResolverIOS, error) {
+	upstreamResolverBase := newUpstreamResolverBase(parentCTX)
+
+	index, err := getInterfaceIndex(interfaceName)
+	if err != nil {
+		log.Debugf("unable to get interface index for %s: %s", interfaceName, err)
+		return nil, err
+	}
+
+	ios := &upstreamResolverIOS{
+		upstreamResolverBase: upstreamResolverBase,
+		lIP:                  ip,
+		lNet:                 net,
+		iIndex:               index,
+	}
+	ios.upstreamClient = ios
+
+	return ios, nil
+}
+
+func (u *upstreamResolverIOS) exchange(upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
+	client := &dns.Client{}
+	upstreamHost, _, err := net.SplitHostPort(upstream)
+	if err != nil {
+		log.Errorf("error while parsing upstream host: %s", err)
+	}
+	upstreamIP := net.ParseIP(upstreamHost)
+	if u.lNet.Contains(upstreamIP) || net.IP.IsPrivate(upstreamIP) {
+		log.Debugf("using private client to query upstream: %s", upstream)
+		client = u.getClientPrivate()
+	}
+
+	return client.Exchange(r, upstream)
+}
+
+// getClientPrivate returns a new DNS client bound to the local IP address of the Netbird interface
+// This method is needed for iOS
+func (u *upstreamResolverIOS) getClientPrivate() *dns.Client {
+	dialer := &net.Dialer{
+		LocalAddr: &net.UDPAddr{
+			IP:   u.lIP,
+			Port: 0, // Let the OS pick a free port
+		},
+		Timeout: upstreamTimeout,
+		Control: func(network, address string, c syscall.RawConn) error {
+			var operr error
+			fn := func(s uintptr) {
+				operr = unix.SetsockoptInt(int(s), unix.IPPROTO_IP, unix.IP_BOUND_IF, u.iIndex)
+			}
+
+			if err := c.Control(fn); err != nil {
+				return err
+			}
+
+			if operr != nil {
+				log.Errorf("error while setting socket option: %s", operr)
+			}
+
+			return operr
+		},
+	}
+	client := &dns.Client{
+		Dialer: dialer,
+	}
+	return client
+}
+
+func getInterfaceIndex(interfaceName string) (int, error) {
+	iface, err := net.InterfaceByName(interfaceName)
+	return iface.Index, err
+}

client/internal/dns/upstream_nonios.go

@@ -0,0 +1,32 @@
+//go:build !ios
+
+package dns
+
+import (
+	"context"
+	"net"
+	"time"
+
+	"github.com/miekg/dns"
+)
+
+type upstreamResolverNonIOS struct {
+	*upstreamResolverBase
+}
+
+func newUpstreamResolver(parentCTX context.Context, interfaceName string, ip net.IP, net *net.IPNet) (*upstreamResolverNonIOS, error) {
+	upstreamResolverBase := newUpstreamResolverBase(parentCTX)
+	nonIOS := &upstreamResolverNonIOS{
+		upstreamResolverBase: upstreamResolverBase,
+	}
+	upstreamResolverBase.upstreamClient = nonIOS
+	return nonIOS, nil
+}
+
+func (u *upstreamResolverNonIOS) exchange(upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
+	upstreamExchangeClient := &dns.Client{}
+	ctx, cancel := context.WithTimeout(u.ctx, u.upstreamTimeout)
+	rm, t, err = upstreamExchangeClient.ExchangeContext(ctx, r, upstream)
+	cancel()
+	return rm, t, err
+}

client/internal/dns/upstream_test.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"context"
+	"net"
 	"strings"
 	"testing"
 	"time"
@@ -49,15 +50,6 @@ func TestUpstreamResolver_ServeDNS(t *testing.T) {
 			timeout:             upstreamTimeout,
 			responseShouldBeNil: true,
 		},
-		//{
-		//	name:        "Should Resolve CNAME Record",
-		//	inputMSG:    new(dns.Msg).SetQuestion("one.one.one.one", dns.TypeCNAME),
-		//},
-		//{
-		//	name:                "Should Not Write When Not Found A Record",
-		//	inputMSG:            new(dns.Msg).SetQuestion("not.found.com", dns.TypeA),
-		//	responseShouldBeNil: true,
-		//},
 	}
 	// should resolve if first upstream times out
 	// should not write when both fails
@@ -66,7 +58,7 @@ func TestUpstreamResolver_ServeDNS(t *testing.T) {
 	for _, testCase := range testCases {
 		t.Run(testCase.name, func(t *testing.T) {
 			ctx, cancel := context.WithCancel(context.TODO())
-			resolver := newUpstreamResolver(ctx)
+			resolver, _ := newUpstreamResolver(ctx, "", net.IP{}, &net.IPNet{})
 			resolver.upstreamServers = testCase.InputServers
 			resolver.upstreamTimeout = testCase.timeout
 			if testCase.cancelCTX {
@@ -114,12 +106,12 @@ type mockUpstreamResolver struct {
 }
 
 // ExchangeContext mock implementation of ExchangeContext from upstreamResolver
-func (c mockUpstreamResolver) ExchangeContext(_ context.Context, _ *dns.Msg, _ string) (r *dns.Msg, rtt time.Duration, err error) {
+func (c mockUpstreamResolver) exchange(upstream string, r *dns.Msg) (*dns.Msg, time.Duration, error) {
 	return c.r, c.rtt, c.err
 }
 
 func TestUpstreamResolver_DeactivationReactivation(t *testing.T) {
-	resolver := &upstreamResolver{
+	resolver := &upstreamResolverBase{
 		ctx: context.TODO(),
 		upstreamClient: &mockUpstreamResolver{
 			err: nil,
@@ -156,7 +148,7 @@ func TestUpstreamResolver_DeactivationReactivation(t *testing.T) {
 	}
 
 	if !resolver.disabled {
-		t.Errorf("resolver should be disabled")
+		t.Errorf("resolver should be Disabled")
 		return
 	}
 

client/internal/engine.go

@@ -197,7 +197,8 @@ func (e *Engine) Start() error {
 
 	var routes []*route.Route
 
-	if runtime.GOOS == "android" {
+	switch runtime.GOOS {
+	case "android":
 		var dnsConfig *nbdns.Config
 		routes, dnsConfig, err = e.readInitialSettings()
 		if err != nil {
@@ -207,25 +208,34 @@ func (e *Engine) Start() error {
 			e.dnsServer = dns.NewDefaultServerPermanentUpstream(e.ctx, e.wgInterface, e.mobileDep.HostDNSAddresses, *dnsConfig, e.mobileDep.NetworkChangeListener)
 			go e.mobileDep.DnsReadyListener.OnReady()
 		}
-	} else if e.dnsServer == nil {
+	case "ios":
-		// todo fix custom address
+		if e.dnsServer == nil {
-		e.dnsServer, err = dns.NewDefaultServer(e.ctx, e.wgInterface, e.config.CustomDNSAddress)
+			e.dnsServer = dns.NewDefaultServerIos(e.ctx, e.wgInterface, e.mobileDep.DnsManager)
-		if err != nil {
+		}
-			e.close()
+	default:
-			return err
+		if e.dnsServer == nil {
+			e.dnsServer, err = dns.NewDefaultServer(e.ctx, e.wgInterface, e.config.CustomDNSAddress)
+			if err != nil {
+				e.close()
+				return err
+			}
 		}
 	}
 
 	e.routeManager = routemanager.NewManager(e.ctx, e.config.WgPrivateKey.PublicKey().String(), e.wgInterface, e.statusRecorder, routes)
 	e.routeManager.SetRouteChangeListener(e.mobileDep.NetworkChangeListener)
 
-	if runtime.GOOS == "android" {
+	switch runtime.GOOS {
-		err = e.wgInterface.CreateOnMobile(iface.MobileIFaceArguments{
+	case "android":
+		err = e.wgInterface.CreateOnAndroid(iface.MobileIFaceArguments{
 			Routes:        e.routeManager.InitialRouteRange(),
 			Dns:           e.dnsServer.DnsIP(),
 			SearchDomains: e.dnsServer.SearchDomains(),
 		})
-	} else {
+	case "ios":
+		e.mobileDep.NetworkChangeListener.SetInterfaceIP(wgAddr)
+		err = e.wgInterface.CreateOniOS(e.mobileDep.FileDescriptor)
+	default:
 		err = e.wgInterface.Create()
 	}
 	if err != nil {
@@ -480,7 +490,7 @@ func (e *Engine) updateSSH(sshConf *mgmProto.SSHConfig) error {
 		}
 		// start SSH server if it wasn't running
 		if isNil(e.sshServer) {
-			//nil sshServer means it has not yet been started
+			// nil sshServer means it has not yet been started
 			var err error
 			e.sshServer, err = e.sshServerFunc(e.config.SSHKey,
 				fmt.Sprintf("%s:%d", e.wgInterface.Address().IP.String(), nbssh.DefaultSSHPort))

client/internal/listener/network_change.go

@@ -3,5 +3,6 @@ package listener
 // NetworkChangeListener is a callback interface for mobile system
 type NetworkChangeListener interface {
 	// OnNetworkChanged invoke when network settings has been changed
-	OnNetworkChanged()
+	OnNetworkChanged(string)
+	SetInterfaceIP(string)
 }

client/internal/mobile_dependency.go

@@ -14,4 +14,6 @@ type MobileDependency struct {
 	NetworkChangeListener listener.NetworkChangeListener
 	HostDNSAddresses      []string
 	DnsReadyListener      dns.ReadyListener
+	DnsManager            dns.IosDnsManager
+	FileDescriptor        int32
 }

client/internal/peer/conn.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"net"
+	"runtime"
 	"strings"
 	"sync"
 	"time"
@@ -225,6 +226,10 @@ func (conn *Conn) candidateTypes() []ice.CandidateType {
 	if hasICEForceRelayConn() {
 		return []ice.CandidateType{ice.CandidateTypeRelay}
 	}
+	// TODO: remove this once we have refactored userspace proxy into the bind package
+	if runtime.GOOS == "ios" {
+		return []ice.CandidateType{ice.CandidateTypeHost, ice.CandidateTypeServerReflexive}
+	}
 	return []ice.CandidateType{ice.CandidateTypeHost, ice.CandidateTypeServerReflexive, ice.CandidateTypeRelay}
 }
 
@@ -464,7 +469,7 @@ func (conn *Conn) cleanup() error {
 	err := conn.statusRecorder.UpdatePeerState(peerState)
 	if err != nil {
 		// pretty common error because by that time Engine can already remove the peer and status won't be available.
-		//todo rethink status updates
+		// todo rethink status updates
 		log.Debugf("error while updating peer's %s state, err: %v", conn.config.Key, err)
 	}
 

client/internal/routemanager/notifier.go

@@ -2,6 +2,7 @@ package routemanager
 
 import (
 	"sort"
+	"strings"
 	"sync"
 
 	"github.com/netbirdio/netbird/client/internal/listener"
@@ -50,9 +51,6 @@ func (n *notifier) onNewRoutes(idMap map[string][]*route.Route) {
 
 	n.routeRangers = newNets
 
-	if !n.hasDiff(n.initialRouteRangers, newNets) {
-		return
-	}
 	n.notify()
 }
 
@@ -64,7 +62,7 @@ func (n *notifier) notify() {
 	}
 
 	go func(l listener.NetworkChangeListener) {
-		l.OnNetworkChanged()
+		l.OnNetworkChanged(strings.Join(n.routeRangers, ","))
 	}(n.listener)
 }
 

client/internal/routemanager/server_android.go

@@ -1,3 +1,5 @@
+//go:build android
+
 package routemanager
 
 import (

client/internal/routemanager/systemops_ios.go

@@ -0,0 +1,15 @@
+//go:build ios
+
+package routemanager
+
+import (
+	"net/netip"
+)
+
+func addToRouteTableIfNoExists(prefix netip.Prefix, addr string) error {
+	return nil
+}
+
+func removeFromRouteTableIfNonSystem(prefix netip.Prefix, addr string) error {
+	return nil
+}

client/internal/routemanager/systemops_nonandroid.go

@@ -1,4 +1,4 @@
-//go:build !android
+//go:build !android && !ios
 
 package routemanager
 

client/ios/NetBirdSDK/client.go

@@ -0,0 +1,224 @@
+package NetBirdSDK
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/internal"
+	"github.com/netbirdio/netbird/client/internal/auth"
+	"github.com/netbirdio/netbird/client/internal/dns"
+	"github.com/netbirdio/netbird/client/internal/listener"
+	"github.com/netbirdio/netbird/client/internal/peer"
+	"github.com/netbirdio/netbird/client/system"
+	"github.com/netbirdio/netbird/formatter"
+)
+
+// ConnectionListener export internal Listener for mobile
+type ConnectionListener interface {
+	peer.Listener
+}
+
+// RouteListener export internal RouteListener for mobile
+type NetworkChangeListener interface {
+	listener.NetworkChangeListener
+}
+
+// DnsManager export internal dns Manager for mobile
+type DnsManager interface {
+	dns.IosDnsManager
+}
+
+// CustomLogger export internal CustomLogger for mobile
+type CustomLogger interface {
+	Debug(message string)
+	Info(message string)
+	Error(message string)
+}
+
+func init() {
+	formatter.SetLogcatFormatter(log.StandardLogger())
+}
+
+// Client struct manage the life circle of background service
+type Client struct {
+	cfgFile               string
+	recorder              *peer.Status
+	ctxCancel             context.CancelFunc
+	ctxCancelLock         *sync.Mutex
+	deviceName            string
+	osName                string
+	osVersion             string
+	networkChangeListener listener.NetworkChangeListener
+	onHostDnsFn           func([]string)
+	dnsManager            dns.IosDnsManager
+	loginComplete         bool
+}
+
+// NewClient instantiate a new Client
+func NewClient(cfgFile, deviceName string, osVersion string, osName string, networkChangeListener NetworkChangeListener, dnsManager DnsManager) *Client {
+	return &Client{
+		cfgFile:               cfgFile,
+		deviceName:            deviceName,
+		osName:                osName,
+		osVersion:             osVersion,
+		recorder:              peer.NewRecorder(""),
+		ctxCancelLock:         &sync.Mutex{},
+		networkChangeListener: networkChangeListener,
+		dnsManager:            dnsManager,
+	}
+}
+
+// Run start the internal client. It is a blocker function
+func (c *Client) Run(fd int32, interfaceName string) error {
+	log.Infof("Starting NetBird client")
+	log.Debugf("Tunnel uses interface: %s", interfaceName)
+	cfg, err := internal.UpdateOrCreateConfig(internal.ConfigInput{
+		ConfigPath: c.cfgFile,
+	})
+	if err != nil {
+		return err
+	}
+	c.recorder.UpdateManagementAddress(cfg.ManagementURL.String())
+
+	var ctx context.Context
+	//nolint
+	ctxWithValues := context.WithValue(context.Background(), system.DeviceNameCtxKey, c.deviceName)
+	//nolint
+	ctxWithValues = context.WithValue(ctxWithValues, system.OsNameCtxKey, c.osName)
+	//nolint
+	ctxWithValues = context.WithValue(ctxWithValues, system.OsVersionCtxKey, c.osVersion)
+	c.ctxCancelLock.Lock()
+	ctx, c.ctxCancel = context.WithCancel(ctxWithValues)
+	defer c.ctxCancel()
+	c.ctxCancelLock.Unlock()
+
+	auth := NewAuthWithConfig(ctx, cfg)
+	err = auth.Login()
+	if err != nil {
+		return err
+	}
+
+	log.Infof("Auth successful")
+	// todo do not throw error in case of cancelled context
+	ctx = internal.CtxInitState(ctx)
+	c.onHostDnsFn = func([]string) {}
+	cfg.WgIface = interfaceName
+	return internal.RunClientiOS(ctx, cfg, c.recorder, fd, c.networkChangeListener, c.dnsManager)
+}
+
+// Stop the internal client and free the resources
+func (c *Client) Stop() {
+	c.ctxCancelLock.Lock()
+	defer c.ctxCancelLock.Unlock()
+	if c.ctxCancel == nil {
+		return
+	}
+
+	c.ctxCancel()
+}
+
+// ÏSetTraceLogLevel configure the logger to trace level
+func (c *Client) SetTraceLogLevel() {
+	log.SetLevel(log.TraceLevel)
+}
+
+// getStatusDetails return with the list of the PeerInfos
+func (c *Client) GetStatusDetails() *StatusDetails {
+
+	fullStatus := c.recorder.GetFullStatus()
+
+	peerInfos := make([]PeerInfo, len(fullStatus.Peers))
+	for n, p := range fullStatus.Peers {
+		pi := PeerInfo{
+			p.IP,
+			p.FQDN,
+			p.ConnStatus.String(),
+		}
+		peerInfos[n] = pi
+	}
+	return &StatusDetails{items: peerInfos, fqdn: fullStatus.LocalPeerState.FQDN, ip: fullStatus.LocalPeerState.IP}
+}
+
+// SetConnectionListener set the network connection listener
+func (c *Client) SetConnectionListener(listener ConnectionListener) {
+	c.recorder.SetConnectionListener(listener)
+}
+
+// RemoveConnectionListener remove connection listener
+func (c *Client) RemoveConnectionListener() {
+	c.recorder.RemoveConnectionListener()
+}
+
+func (c *Client) IsLoginRequired() bool {
+	var ctx context.Context
+	//nolint
+	ctxWithValues := context.WithValue(context.Background(), system.DeviceNameCtxKey, c.deviceName)
+	//nolint
+	ctxWithValues = context.WithValue(ctxWithValues, system.OsNameCtxKey, c.osName)
+	//nolint
+	ctxWithValues = context.WithValue(ctxWithValues, system.OsVersionCtxKey, c.osVersion)
+	c.ctxCancelLock.Lock()
+	defer c.ctxCancelLock.Unlock()
+	ctx, c.ctxCancel = context.WithCancel(ctxWithValues)
+
+	cfg, _ := internal.UpdateOrCreateConfig(internal.ConfigInput{
+		ConfigPath: c.cfgFile,
+	})
+
+	needsLogin, _ := internal.IsLoginRequired(ctx, cfg.PrivateKey, cfg.ManagementURL, cfg.SSHKey)
+	return needsLogin
+}
+
+func (c *Client) LoginForMobile() string {
+	var ctx context.Context
+	//nolint
+	ctxWithValues := context.WithValue(context.Background(), system.DeviceNameCtxKey, c.deviceName)
+	//nolint
+	ctxWithValues = context.WithValue(ctxWithValues, system.OsNameCtxKey, c.osName)
+	//nolint
+	ctxWithValues = context.WithValue(ctxWithValues, system.OsVersionCtxKey, c.osVersion)
+	c.ctxCancelLock.Lock()
+	defer c.ctxCancelLock.Unlock()
+	ctx, c.ctxCancel = context.WithCancel(ctxWithValues)
+
+	cfg, _ := internal.UpdateOrCreateConfig(internal.ConfigInput{
+		ConfigPath: c.cfgFile,
+	})
+
+	oAuthFlow, err := auth.NewOAuthFlow(ctx, cfg, false)
+	if err != nil {
+		return err.Error()
+	}
+
+	flowInfo, err := oAuthFlow.RequestAuthInfo(context.TODO())
+	if err != nil {
+		return err.Error()
+	}
+
+	// This could cause a potential race condition with loading the extension which need to be handled on swift side
+	go func() {
+		waitTimeout := time.Duration(flowInfo.ExpiresIn) * time.Second
+		waitCTX, cancel := context.WithTimeout(ctx, waitTimeout)
+		defer cancel()
+		tokenInfo, err := oAuthFlow.WaitToken(waitCTX, flowInfo)
+		if err != nil {
+			return
+		}
+		jwtToken := tokenInfo.GetTokenToUse()
+		_ = internal.Login(ctx, cfg, "", jwtToken)
+		c.loginComplete = true
+	}()
+
+	return flowInfo.VerificationURIComplete
+}
+
+func (c *Client) IsLoginComplete() bool {
+	return c.loginComplete
+}
+
+func (c *Client) ClearLoginComplete() {
+	c.loginComplete = false
+}

client/ios/NetBirdSDK/gomobile.go

@@ -0,0 +1,5 @@
+package NetBirdSDK
+
+import _ "golang.org/x/mobile/bind"
+
+// to keep our CI/CD that checks go.mod and go.sum files happy, we need to import the package above

client/ios/NetBirdSDK/logger.go

@@ -0,0 +1,10 @@
+package NetBirdSDK
+
+import (
+	"github.com/netbirdio/netbird/util"
+)
+
+// InitializeLog initializes the log file.
+func InitializeLog(logLevel string, filePath string) error {
+	return util.InitLog(logLevel, filePath)
+}

client/ios/NetBirdSDK/login.go

@@ -0,0 +1,159 @@
+package NetBirdSDK
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
+	log "github.com/sirupsen/logrus"
+	"google.golang.org/grpc/codes"
+	gstatus "google.golang.org/grpc/status"
+
+	"github.com/netbirdio/netbird/client/cmd"
+	"github.com/netbirdio/netbird/client/internal"
+	"github.com/netbirdio/netbird/client/system"
+)
+
+// SSOListener is async listener for mobile framework
+type SSOListener interface {
+	OnSuccess(bool)
+	OnError(error)
+}
+
+// ErrListener is async listener for mobile framework
+type ErrListener interface {
+	OnSuccess()
+	OnError(error)
+}
+
+// URLOpener it is a callback interface. The Open function will be triggered if
+// the backend want to show an url for the user
+type URLOpener interface {
+	Open(string)
+}
+
+// Auth can register or login new client
+type Auth struct {
+	ctx     context.Context
+	config  *internal.Config
+	cfgPath string
+}
+
+// NewAuth instantiate Auth struct and validate the management URL
+func NewAuth(cfgPath string, mgmURL string) (*Auth, error) {
+	inputCfg := internal.ConfigInput{
+		ManagementURL: mgmURL,
+	}
+
+	cfg, err := internal.CreateInMemoryConfig(inputCfg)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Auth{
+		ctx:     context.Background(),
+		config:  cfg,
+		cfgPath: cfgPath,
+	}, nil
+}
+
+// NewAuthWithConfig instantiate Auth based on existing config
+func NewAuthWithConfig(ctx context.Context, config *internal.Config) *Auth {
+	return &Auth{
+		ctx:    ctx,
+		config: config,
+	}
+}
+
+// SaveConfigIfSSOSupported test the connectivity with the management server by retrieving the server device flow info.
+// If it returns a flow info than save the configuration and return true. If it gets a codes.NotFound, it means that SSO
+// is not supported and returns false without saving the configuration. For other errors return false.
+func (a *Auth) SaveConfigIfSSOSupported() (bool, error) {
+	supportsSSO := true
+	err := a.withBackOff(a.ctx, func() (err error) {
+		_, err = internal.GetDeviceAuthorizationFlowInfo(a.ctx, a.config.PrivateKey, a.config.ManagementURL)
+		if s, ok := gstatus.FromError(err); ok && s.Code() == codes.NotFound {
+			_, err = internal.GetPKCEAuthorizationFlowInfo(a.ctx, a.config.PrivateKey, a.config.ManagementURL)
+			if s, ok := gstatus.FromError(err); ok && s.Code() == codes.NotFound {
+				supportsSSO = false
+				err = nil
+			}
+
+			return err
+		}
+
+		return err
+	})
+
+	if !supportsSSO {
+		return false, nil
+	}
+
+	if err != nil {
+		return false, fmt.Errorf("backoff cycle failed: %v", err)
+	}
+
+	err = internal.WriteOutConfig(a.cfgPath, a.config)
+	return true, err
+}
+
+// LoginWithSetupKeyAndSaveConfig test the connectivity with the management server with the setup key.
+func (a *Auth) LoginWithSetupKeyAndSaveConfig(setupKey string, deviceName string) error {
+	//nolint
+	ctxWithValues := context.WithValue(a.ctx, system.DeviceNameCtxKey, deviceName)
+
+	err := a.withBackOff(a.ctx, func() error {
+		backoffErr := internal.Login(ctxWithValues, a.config, setupKey, "")
+		if s, ok := gstatus.FromError(backoffErr); ok && (s.Code() == codes.PermissionDenied) {
+			// we got an answer from management, exit backoff earlier
+			return backoff.Permanent(backoffErr)
+		}
+		return backoffErr
+	})
+	if err != nil {
+		return fmt.Errorf("backoff cycle failed: %v", err)
+	}
+
+	return internal.WriteOutConfig(a.cfgPath, a.config)
+}
+
+func (a *Auth) Login() error {
+	var needsLogin bool
+
+	// check if we need to generate JWT token
+	err := a.withBackOff(a.ctx, func() (err error) {
+		needsLogin, err = internal.IsLoginRequired(a.ctx, a.config.PrivateKey, a.config.ManagementURL, a.config.SSHKey)
+		return
+	})
+	if err != nil {
+		return fmt.Errorf("backoff cycle failed: %v", err)
+	}
+
+	jwtToken := ""
+	if needsLogin {
+		return fmt.Errorf("Not authenticated")
+	}
+
+	err = a.withBackOff(a.ctx, func() error {
+		err := internal.Login(a.ctx, a.config, "", jwtToken)
+		if s, ok := gstatus.FromError(err); ok && (s.Code() == codes.InvalidArgument || s.Code() == codes.PermissionDenied) {
+			return nil
+		}
+		return err
+	})
+	if err != nil {
+		return fmt.Errorf("backoff cycle failed: %v", err)
+	}
+
+	return nil
+}
+
+func (a *Auth) withBackOff(ctx context.Context, bf func() error) error {
+	return backoff.RetryNotify(
+		bf,
+		backoff.WithContext(cmd.CLIBackOffSettings, ctx),
+		func(err error, duration time.Duration) {
+			log.Warnf("retrying Login to the Management service in %v due to error %v", duration, err)
+		})
+}

client/ios/NetBirdSDK/peer_notifier.go

@@ -0,0 +1,50 @@
+package NetBirdSDK
+
+// PeerInfo describe information about the peers. It designed for the UI usage
+type PeerInfo struct {
+	IP         string
+	FQDN       string
+	ConnStatus string // Todo replace to enum
+}
+
+// PeerInfoCollection made for Java layer to get non default types as collection
+type PeerInfoCollection interface {
+	Add(s string) PeerInfoCollection
+	Get(i int) string
+	Size() int
+	GetFQDN() string
+	GetIP() string
+}
+
+// StatusDetails is the implementation of the PeerInfoCollection
+type StatusDetails struct {
+	items []PeerInfo
+	fqdn  string
+	ip    string
+}
+
+// Add new PeerInfo to the collection
+func (array StatusDetails) Add(s PeerInfo) StatusDetails {
+	array.items = append(array.items, s)
+	return array
+}
+
+// Get return an element of the collection
+func (array StatusDetails) Get(i int) *PeerInfo {
+	return &array.items[i]
+}
+
+// Size return with the size of the collection
+func (array StatusDetails) Size() int {
+	return len(array.items)
+}
+
+// GetFQDN return with the FQDN of the local peer
+func (array StatusDetails) GetFQDN() string {
+	return array.fqdn
+}
+
+// GetIP return with the IP of the local peer
+func (array StatusDetails) GetIP() string {
+	return array.ip
+}

client/ios/NetBirdSDK/preferences.go

@@ -0,0 +1,78 @@
+package NetBirdSDK
+
+import (
+	"github.com/netbirdio/netbird/client/internal"
+)
+
+// Preferences export a subset of the internal config for gomobile
+type Preferences struct {
+	configInput internal.ConfigInput
+}
+
+// NewPreferences create new Preferences instance
+func NewPreferences(configPath string) *Preferences {
+	ci := internal.ConfigInput{
+		ConfigPath: configPath,
+	}
+	return &Preferences{ci}
+}
+
+// GetManagementURL read url from config file
+func (p *Preferences) GetManagementURL() (string, error) {
+	if p.configInput.ManagementURL != "" {
+		return p.configInput.ManagementURL, nil
+	}
+
+	cfg, err := internal.ReadConfig(p.configInput.ConfigPath)
+	if err != nil {
+		return "", err
+	}
+	return cfg.ManagementURL.String(), err
+}
+
+// SetManagementURL store the given url and wait for commit
+func (p *Preferences) SetManagementURL(url string) {
+	p.configInput.ManagementURL = url
+}
+
+// GetAdminURL read url from config file
+func (p *Preferences) GetAdminURL() (string, error) {
+	if p.configInput.AdminURL != "" {
+		return p.configInput.AdminURL, nil
+	}
+
+	cfg, err := internal.ReadConfig(p.configInput.ConfigPath)
+	if err != nil {
+		return "", err
+	}
+	return cfg.AdminURL.String(), err
+}
+
+// SetAdminURL store the given url and wait for commit
+func (p *Preferences) SetAdminURL(url string) {
+	p.configInput.AdminURL = url
+}
+
+// GetPreSharedKey read preshared key from config file
+func (p *Preferences) GetPreSharedKey() (string, error) {
+	if p.configInput.PreSharedKey != nil {
+		return *p.configInput.PreSharedKey, nil
+	}
+
+	cfg, err := internal.ReadConfig(p.configInput.ConfigPath)
+	if err != nil {
+		return "", err
+	}
+	return cfg.PreSharedKey, err
+}
+
+// SetPreSharedKey store the given key and wait for commit
+func (p *Preferences) SetPreSharedKey(key string) {
+	p.configInput.PreSharedKey = &key
+}
+
+// Commit write out the changes into config file
+func (p *Preferences) Commit() error {
+	_, err := internal.UpdateOrCreateConfig(p.configInput)
+	return err
+}

client/ios/NetBirdSDK/preferences_test.go

@@ -0,0 +1,120 @@
+package NetBirdSDK
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/netbirdio/netbird/client/internal"
+)
+
+func TestPreferences_DefaultValues(t *testing.T) {
+	cfgFile := filepath.Join(t.TempDir(), "netbird.json")
+	p := NewPreferences(cfgFile)
+	defaultVar, err := p.GetAdminURL()
+	if err != nil {
+		t.Fatalf("failed to read default value: %s", err)
+	}
+
+	if defaultVar != internal.DefaultAdminURL {
+		t.Errorf("invalid default admin url: %s", defaultVar)
+	}
+
+	defaultVar, err = p.GetManagementURL()
+	if err != nil {
+		t.Fatalf("failed to read default management URL: %s", err)
+	}
+
+	if defaultVar != internal.DefaultManagementURL {
+		t.Errorf("invalid default management url: %s", defaultVar)
+	}
+
+	var preSharedKey string
+	preSharedKey, err = p.GetPreSharedKey()
+	if err != nil {
+		t.Fatalf("failed to read default preshared key: %s", err)
+	}
+
+	if preSharedKey != "" {
+		t.Errorf("invalid preshared key: %s", preSharedKey)
+	}
+}
+
+func TestPreferences_ReadUncommitedValues(t *testing.T) {
+	exampleString := "exampleString"
+	cfgFile := filepath.Join(t.TempDir(), "netbird.json")
+	p := NewPreferences(cfgFile)
+
+	p.SetAdminURL(exampleString)
+	resp, err := p.GetAdminURL()
+	if err != nil {
+		t.Fatalf("failed to read admin url: %s", err)
+	}
+
+	if resp != exampleString {
+		t.Errorf("unexpected admin url: %s", resp)
+	}
+
+	p.SetManagementURL(exampleString)
+	resp, err = p.GetManagementURL()
+	if err != nil {
+		t.Fatalf("failed to read management url: %s", err)
+	}
+
+	if resp != exampleString {
+		t.Errorf("unexpected management url: %s", resp)
+	}
+
+	p.SetPreSharedKey(exampleString)
+	resp, err = p.GetPreSharedKey()
+	if err != nil {
+		t.Fatalf("failed to read preshared key: %s", err)
+	}
+
+	if resp != exampleString {
+		t.Errorf("unexpected preshared key: %s", resp)
+	}
+}
+
+func TestPreferences_Commit(t *testing.T) {
+	exampleURL := "https://myurl.com:443"
+	examplePresharedKey := "topsecret"
+	cfgFile := filepath.Join(t.TempDir(), "netbird.json")
+	p := NewPreferences(cfgFile)
+
+	p.SetAdminURL(exampleURL)
+	p.SetManagementURL(exampleURL)
+	p.SetPreSharedKey(examplePresharedKey)
+
+	err := p.Commit()
+	if err != nil {
+		t.Fatalf("failed to save changes: %s", err)
+	}
+
+	p = NewPreferences(cfgFile)
+	resp, err := p.GetAdminURL()
+	if err != nil {
+		t.Fatalf("failed to read admin url: %s", err)
+	}
+
+	if resp != exampleURL {
+		t.Errorf("unexpected admin url: %s", resp)
+	}
+
+	resp, err = p.GetManagementURL()
+	if err != nil {
+		t.Fatalf("failed to read management url: %s", err)
+	}
+
+	if resp != exampleURL {
+		t.Errorf("unexpected management url: %s", resp)
+	}
+
+	resp, err = p.GetPreSharedKey()
+	if err != nil {
+		t.Fatalf("failed to read preshared key: %s", err)
+	}
+
+	if resp != examplePresharedKey {
+		t.Errorf("unexpected preshared key: %s", resp)
+	}
+}

client/system/info.go

@@ -12,6 +12,12 @@ import (
 // DeviceNameCtxKey context key for device name
 const DeviceNameCtxKey = "deviceName"
 
+// OsVersionCtxKey context key for operating system version
+const OsVersionCtxKey = "OsVersion"
+
+// OsNameCtxKey context key for operating system name
+const OsNameCtxKey = "OsName"
+
 // Info is an object that contains machine information
 // Most of the code is taken from https://github.com/matishsiao/goInfo
 type Info struct {

client/system/info_darwin.go

@@ -1,3 +1,6 @@
+//go:build !ios
+// +build !ios
+
 package system
 
 import (

client/system/info_ios.go

@@ -0,0 +1,44 @@
+//go:build ios
+// +build ios
+
+package system
+
+import (
+	"context"
+	"runtime"
+
+	"github.com/netbirdio/netbird/version"
+)
+
+// GetInfo retrieves and parses the system information
+func GetInfo(ctx context.Context) *Info {
+
+	// Convert fixed-size byte arrays to Go strings
+	sysName := extractOsName(ctx, "sysName")
+	swVersion := extractOsVersion(ctx, "swVersion")
+
+	gio := &Info{Kernel: sysName, OSVersion: swVersion, Core: swVersion, Platform: "unknown", OS: sysName, GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
+	gio.Hostname = extractDeviceName(ctx, "hostname")
+	gio.WiretrusteeVersion = version.NetbirdVersion()
+	gio.UIVersion = extractUserAgent(ctx)
+
+	return gio
+}
+
+// extractOsVersion extracts operating system version from context or returns the default
+func extractOsVersion(ctx context.Context, defaultName string) string {
+	v, ok := ctx.Value(OsVersionCtxKey).(string)
+	if !ok {
+		return defaultName
+	}
+	return v
+}
+
+// extractOsName extracts operating system name from context or returns the default
+func extractOsName(ctx context.Context, defaultName string) string {
+	v, ok := ctx.Value(OsNameCtxKey).(string)
+	if !ok {
+		return defaultName
+	}
+	return v
+}

iface/iface_android.go

@@ -28,14 +28,20 @@ func NewWGIFace(ifaceName string, address string, mtu int, tunAdapter TunAdapter
 	return wgIFace, nil
 }
 
-// CreateOnMobile creates a new Wireguard interface, sets a given IP and brings it up.
+// CreateOnAndroid creates a new Wireguard interface, sets a given IP and brings it up.
 // Will reuse an existing one.
-func (w *WGIface) CreateOnMobile(mIFaceArgs MobileIFaceArguments) error {
+func (w *WGIface) CreateOnAndroid(mIFaceArgs MobileIFaceArguments) error {
 	w.mu.Lock()
 	defer w.mu.Unlock()
 	return w.tun.Create(mIFaceArgs)
 }
 
+// CreateOniOS creates a new Wireguard interface, sets a given IP and brings it up.
+// Will reuse an existing one.
+func (w *WGIface) CreateOniOS(tunFd int32) error {
+	return fmt.Errorf("this function has not implemented on mobile")
+}
+
 // Create this function make sense on mobile only
 func (w *WGIface) Create() error {
 	return fmt.Errorf("this function has not implemented on mobile")

iface/iface_ios.go

@@ -0,0 +1,51 @@
+//go:build ios
+// +build ios
+
+package iface
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/pion/transport/v2"
+)
+
+// NewWGIFace Creates a new WireGuard interface instance
+func NewWGIFace(ifaceName string, address string, mtu int, tunAdapter TunAdapter, transportNet transport.Net) (*WGIface, error) {
+	wgIFace := &WGIface{
+		mu: sync.Mutex{},
+	}
+
+	wgAddress, err := parseWGAddress(address)
+	if err != nil {
+		return wgIFace, err
+	}
+
+	tun := newTunDevice(ifaceName, wgAddress, mtu, tunAdapter, transportNet)
+	wgIFace.tun = tun
+
+	wgIFace.configurer = newWGConfigurer(tun)
+
+	wgIFace.userspaceBind = !WireGuardModuleIsLoaded()
+
+	return wgIFace, nil
+}
+
+// CreateOniOS creates a new Wireguard interface, sets a given IP and brings it up.
+// Will reuse an existing one.
+func (w *WGIface) CreateOniOS(tunFd int32) error {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	return w.tun.Create(tunFd)
+}
+
+// CreateOnAndroid creates a new Wireguard interface, sets a given IP and brings it up.
+// Will reuse an existing one.
+func (w *WGIface) CreateOnAndroid(mIFaceArgs MobileIFaceArguments) error {
+	return fmt.Errorf("this function has not implemented on mobile")
+}
+
+// Create this function make sense on mobile only
+func (w *WGIface) Create() error {
+	return fmt.Errorf("this function has not implemented on mobile")
+}

iface/iface_nonandroid.go

@@ -1,4 +1,5 @@
-//go:build !android
+//go:build !android && !ios
+// +build !android,!ios
 
 package iface
 
@@ -27,8 +28,13 @@ func NewWGIFace(iFaceName string, address string, mtu int, tunAdapter TunAdapter
 	return wgIFace, nil
 }
 
-// CreateOnMobile this function make sense on mobile only
+// CreateOnAndroid this function make sense on mobile only
-func (w *WGIface) CreateOnMobile(mIFaceArgs MobileIFaceArguments) error {
+func (w *WGIface) CreateOnAndroid(mIFaceArgs MobileIFaceArguments) error {
+	return fmt.Errorf("this function has not implemented on non mobile")
+}
+
+// CreateOniOS this function make sense on mobile only
+func (w *WGIface) CreateOniOS(tunFd int32) error {
 	return fmt.Errorf("this function has not implemented on non mobile")
 }
 

iface/ipc_parser_mobile.go

@@ -1,3 +1,6 @@
+//go:build android || ios
+// +build android ios
+
 package iface
 
 import (

iface/tun_android.go

@@ -1,3 +1,6 @@
+//go:build android
+// +build android
+
 package iface
 
 import (
@@ -56,7 +59,7 @@ func (t *tunDevice) Create(mIFaceArgs MobileIFaceArguments) error {
 	t.device = device.NewDevice(t.wrapper, t.iceBind, device.NewLogger(device.LogLevelSilent, "[wiretrustee] "))
 	// without this property mobile devices can discover remote endpoints if the configured one was wrong.
 	// this helps with support for the older NetBird clients that had a hardcoded direct mode
-	//t.device.DisableSomeRoamingForBrokenMobileSemantics()
+	// t.device.DisableSomeRoamingForBrokenMobileSemantics()
 
 	err = t.device.Up()
 	if err != nil {

iface/tun_darwin.go

@@ -1,3 +1,6 @@
+//go:build !ios
+// +build !ios
+
 package iface
 
 import (

iface/tun_ios.go

@@ -0,0 +1,101 @@
+//go:build ios
+// +build ios
+
+package iface
+
+import (
+	"os"
+
+	"github.com/pion/transport/v2"
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/sys/unix"
+	"golang.zx2c4.com/wireguard/device"
+	"golang.zx2c4.com/wireguard/tun"
+
+	"github.com/netbirdio/netbird/iface/bind"
+)
+
+type tunDevice struct {
+	address    WGAddress
+	mtu        int
+	tunAdapter TunAdapter
+	iceBind    *bind.ICEBind
+
+	fd      int
+	name    string
+	device  *device.Device
+	wrapper *DeviceWrapper
+}
+
+func newTunDevice(name string, address WGAddress, mtu int, tunAdapter TunAdapter, transportNet transport.Net) *tunDevice {
+	return &tunDevice{
+		name:       name,
+		address:    address,
+		mtu:        mtu,
+		tunAdapter: tunAdapter,
+		iceBind:    bind.NewICEBind(transportNet),
+	}
+}
+
+func (t *tunDevice) Create(tunFd int32) error {
+	log.Infof("create tun interface")
+
+	dupTunFd, err := unix.Dup(int(tunFd))
+	if err != nil {
+		log.Errorf("Unable to dup tun fd: %v", err)
+		return err
+	}
+
+	err = unix.SetNonblock(dupTunFd, true)
+	if err != nil {
+		log.Errorf("Unable to set tun fd as non blocking: %v", err)
+		unix.Close(dupTunFd)
+		return err
+	}
+	tun, err := tun.CreateTUNFromFile(os.NewFile(uintptr(dupTunFd), "/dev/tun"), 0)
+	if err != nil {
+		log.Errorf("Unable to create new tun device from fd: %v", err)
+		unix.Close(dupTunFd)
+		return err
+	}
+
+	t.wrapper = newDeviceWrapper(tun)
+	log.Debug("Attaching to interface")
+	t.device = device.NewDevice(t.wrapper, t.iceBind, device.NewLogger(device.LogLevelSilent, "[wiretrustee] "))
+	// without this property mobile devices can discover remote endpoints if the configured one was wrong.
+	// this helps with support for the older NetBird clients that had a hardcoded direct mode
+	// t.device.DisableSomeRoamingForBrokenMobileSemantics()
+
+	err = t.device.Up()
+	if err != nil {
+		t.device.Close()
+		return err
+	}
+	log.Debugf("device is ready to use: %s", t.name)
+	return nil
+}
+
+func (t *tunDevice) Device() *device.Device {
+	return t.device
+}
+
+func (t *tunDevice) DeviceName() string {
+	return t.name
+}
+
+func (t *tunDevice) WgAddress() WGAddress {
+	return t.address
+}
+
+func (t *tunDevice) UpdateAddr(addr WGAddress) error {
+	// todo implement
+	return nil
+}
+
+func (t *tunDevice) Close() (err error) {
+	if t.device != nil {
+		t.device.Close()
+	}
+
+	return
+}

iface/tun_unix.go

@@ -1,4 +1,4 @@
-//go:build (linux || darwin) && !android
+//go:build (linux || darwin) && !android && !ios
 
 package iface
 

iface/wg_configurer_mobile.go

@@ -1,12 +1,17 @@
+//go:build ios || android
+// +build ios android
+
 package iface
 
 import (
+	"encoding/hex"
 	"errors"
+	"fmt"
 	"net"
+	"strings"
 	"time"
 
 	log "github.com/sirupsen/logrus"
-
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 )
 
@@ -42,7 +47,7 @@ func (c *wGConfigurer) configureInterface(privateKey string, port int) error {
 }
 
 func (c *wGConfigurer) updatePeer(peerKey string, allowedIps string, keepAlive time.Duration, endpoint *net.UDPAddr, preSharedKey *wgtypes.Key) error {
-	//parse allowed ips
+	// parse allowed ips
 	_, ipNet, err := net.ParseCIDR(allowedIps)
 	if err != nil {
 		return err
@@ -109,6 +114,52 @@ func (c *wGConfigurer) addAllowedIP(peerKey string, allowedIP string) error {
 	return c.tunDevice.Device().IpcSet(toWgUserspaceString(config))
 }
 
-func (c *wGConfigurer) removeAllowedIP(peerKey string, allowedIP string) error {
+func (c *wGConfigurer) removeAllowedIP(peerKey string, ip string) error {
-	return errFuncNotImplemented
+	ipc, err := c.tunDevice.Device().IpcGet()
+	if err != nil {
+		return err
+	}
+
+	peerKeyParsed, err := wgtypes.ParseKey(peerKey)
+	hexKey := hex.EncodeToString(peerKeyParsed[:])
+
+	lines := strings.Split(ipc, "\n")
+
+	output := ""
+	foundPeer := false
+	removedAllowedIP := false
+	for _, line := range lines {
+		line = strings.TrimSpace(line)
+
+		// If we're within the details of the found peer and encounter another public key,
+		// this means we're starting another peer's details. So, reset the flag.
+		if strings.HasPrefix(line, "public_key=") && foundPeer {
+			foundPeer = false
+		}
+
+		// Identify the peer with the specific public key
+		if line == fmt.Sprintf("public_key=%s", hexKey) {
+			foundPeer = true
+		}
+
+		// If we're within the details of the found peer and find the specific allowed IP, skip this line
+		if foundPeer && line == "allowed_ip="+ip {
+			removedAllowedIP = true
+			continue
+		}
+
+		// Append the line to the output string
+		if strings.HasPrefix(line, "private_key=") || strings.HasPrefix(line, "listen_port=") ||
+			strings.HasPrefix(line, "public_key=") || strings.HasPrefix(line, "preshared_key=") ||
+			strings.HasPrefix(line, "endpoint=") || strings.HasPrefix(line, "persistent_keepalive_interval=") ||
+			strings.HasPrefix(line, "allowed_ip=") {
+			output += line + "\n"
+		}
+	}
+
+	if !removedAllowedIP {
+		return fmt.Errorf("allowedIP not found")
+	} else {
+		return c.tunDevice.Device().IpcSet(output)
+	}
 }

iface/wg_configurer_nonmobile.go

@@ -1,4 +1,4 @@
-//go:build !android
+//go:build !android && !ios
 
 package iface
 
@@ -44,7 +44,7 @@ func (c *wGConfigurer) configureInterface(privateKey string, port int) error {
 }
 
 func (c *wGConfigurer) updatePeer(peerKey string, allowedIps string, keepAlive time.Duration, endpoint *net.UDPAddr, preSharedKey *wgtypes.Key) error {
-	//parse allowed ips
+	// parse allowed ips
 	_, ipNet, err := net.ParseCIDR(allowedIps)
 	if err != nil {
 		return err