Dummy file

client/android/client.go

@@ -26,8 +26,6 @@ import (
 	"github.com/netbirdio/netbird/client/internal/routemanager"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	"github.com/netbirdio/netbird/client/net"
-	"github.com/netbirdio/netbird/client/netstate"
-	"github.com/netbirdio/netbird/client/netsweep"
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/formatter"
 	"github.com/netbirdio/netbird/route"
@@ -42,6 +40,11 @@ const (
 	AnonymizeLevelStrict  = nbAnonymize.LevelStrictString
 )
 
+// ConnectionListener export internal Listener for mobile
+type ConnectionListener interface {
+	peer.Listener
+}
+
 // TunAdapter export internal TunAdapter for mobile
 type TunAdapter interface {
 	device.TunAdapter
@@ -82,13 +85,6 @@ type Client struct {
 	deviceName            string
 	uiVersion             string
 	networkChangeListener listener.NetworkChangeListener
-	// netState outlives engine restarts: it mirrors the OS connectivity, not
-	// the engine lifecycle. Run and RunWithoutLogin inject it into each new
-	// ConnectClient, which distributes it to every reconnection loop.
-	netState *netstate.State
-
-	// sweeper also outlives engine restarts; NotifyNetworkChange sweeps it.
-	sweeper *netsweep.Sweeper
 
 	stateMu       sync.RWMutex
 	connectClient *internal.ConnectClient
@@ -160,8 +156,6 @@ func NewClient(androidSDKVersion int, deviceName string, uiVersion string, tunAd
 		recorder:              peer.NewRecorder(""),
 		ctxCancelLock:         &sync.Mutex{},
 		networkChangeListener: networkChangeListener,
-		netState:              netstate.New(),
-		sweeper:               netsweep.New(),
 	}
 }
 
@@ -202,8 +196,7 @@ func (c *Client) Run(platformFiles PlatformFiles, urlOpener URLOpener, isAndroid
 	}
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	connectClient := internal.NewConnectClient(ctx, cfg, c.recorder,
-		internal.WithNetworkState(c.netState), internal.WithSweeper(c.sweeper))
+	connectClient := internal.NewConnectClient(ctx, cfg, c.recorder)
 	c.setState(cfg, cacheDir, cfgFile, connectClient)
 	// This path runs the interactive SSO flow, so reaching here means the peer
 	// is authenticated again — release the latch Status() reports from. Clear
@@ -244,8 +237,7 @@ func (c *Client) RunWithoutLogin(platformFiles PlatformFiles, dns *DNSList, dnsR
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	connectClient := internal.NewConnectClient(ctx, cfg, c.recorder,
-		internal.WithNetworkState(c.netState), internal.WithSweeper(c.sweeper))
+	connectClient := internal.NewConnectClient(ctx, cfg, c.recorder)
 	c.setState(cfg, cacheDir, cfgFile, connectClient)
 	return connectClient.RunOnAndroid(c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, slices.Clone(dns.items), dnsReadyListener, stateFile, cacheDir)
 }
@@ -293,24 +285,6 @@ func (c *Client) GetTunSettings() (*TunSettings, error) {
 	}, nil
 }
 
-// SetNetworkAvailable feeds OS-reported network availability into the client.
-// While unavailable, the internal reconnect loops suspend their attempts and
-// the connection listener reports NoNetwork instead of Connecting; when
-// availability returns, the loops resume immediately with a fresh backoff.
-func (c *Client) SetNetworkAvailable(available bool) {
-	c.netState.Set(available)
-	c.recorder.SetNetworkAvailable(available)
-}
-
-// NotifyNetworkChange marks the management, signal and relay connections
-// stale after the OS switched networks and schedules a sweep that cuts
-// whatever has not redialed on the new network by then. The engine and the
-// TUN device stay untouched.
-func (c *Client) NotifyNetworkChange() {
-	c.sweeper.MarkNetworkChange()
-	log.Infof("network change: connections marked stale")
-}
-
 // DebugBundle generates a debug bundle, uploads it, and returns the upload key.
 // It works both with and without a running engine. anonymizeLevel is "default"
 // or "strict"; strict also anonymizes internal IP ranges, peer names, and
@@ -551,11 +525,7 @@ func (c *Client) OnUpdatedHostDNS(list *DNSList) error {
 
 // SetConnectionListener set the network connection listener
 func (c *Client) SetConnectionListener(listener ConnectionListener) {
-	if listener == nil {
-		c.recorder.RemoveConnectionListener()
-		return
-	}
-	c.recorder.SetConnectionListener(connectionListenerAdapter{listener})
+	c.recorder.SetConnectionListener(listener)
 }
 
 // RemoveConnectionListener remove connection listener

client/android/connection_listener.go

@@ -1,41 +0,0 @@
-//go:build android
-
-package android
-
-import (
-	"github.com/netbirdio/netbird/client/internal/peer"
-)
-
-// Client state values delivered via ConnectionListener.OnStateChanged,
-// re-exported as basic constants so gomobile emits them into the generated
-// Java bindings. They mirror peer.ClientState*: append-only, never reorder.
-const (
-	ClientStateDisconnected  = int(peer.ClientStateDisconnected)
-	ClientStateConnected     = int(peer.ClientStateConnected)
-	ClientStateConnecting    = int(peer.ClientStateConnecting)
-	ClientStateDisconnecting = int(peer.ClientStateDisconnecting)
-	ClientStateNoNetwork     = int(peer.ClientStateNoNetwork)
-)
-
-// ConnectionListener export internal Listener for mobile. It mirrors
-// peer.Listener with OnStateChanged taking a plain int (one of the
-// ClientState* constants), because gomobile cannot bind named types.
-type ConnectionListener interface {
-	OnStateChanged(state int)
-	OnConnected()
-	OnDisconnected()
-	OnConnecting()
-	OnDisconnecting()
-	OnAddressChanged(string, string)
-	OnPeersListChanged(int)
-}
-
-// connectionListenerAdapter adapts the gomobile-facing ConnectionListener to
-// peer.Listener, converting the typed state to the int the binding carries.
-type connectionListenerAdapter struct {
-	ConnectionListener
-}
-
-func (a connectionListenerAdapter) OnStateChanged(state peer.ClientState) {
-	a.ConnectionListener.OnStateChanged(int(state))
-}

client/firewall/iptables/acl_linux.go

@@ -42,6 +42,7 @@ type aclManager struct {
 	optionalEntries map[string][]entry
 	ipsetStore      *ipsetStore
 	v6              bool
+	ipsetSupported  bool
 
 	stateManager *statemanager.Manager
 }
@@ -60,6 +61,8 @@ func newAclManager(iptablesClient *iptables.IPTables, wgIface iFaceMapper) (*acl
 func (m *aclManager) init(stateManager *statemanager.Manager) error {
 	m.stateManager = stateManager
 
+	m.ipsetSupported = m.probeIPSetSupport()
+
 	m.seedInitialEntries()
 	m.seedInitialOptionalEntries()
 
@@ -91,6 +94,12 @@ func (m *aclManager) AddPeerFiltering(
 	if m.v6 && ipsetName != "" {
 		ipsetName += "-v6"
 	}
+	// When the kernel lacks the required ipset hash module, fall back to
+	// per-IP iptables rules (pre-0.68 behavior) so ACLs keep working instead
+	// of silently leaving the chain empty.
+	if ipsetName != "" && !m.ipsetSupported {
+		ipsetName = ""
+	}
 	proto := protoForFamily(protocol, m.v6)
 	specs := filterRuleSpecs(ip, proto, sPort, dPort, action, ipsetName)
 
@@ -498,6 +507,40 @@ func transformIPsetName(ipsetName string, sPort, dPort *firewall.Port, action fi
 	}
 }
 
+// probeIPSetSupport checks whether the kernel can create the ipset type used for
+// ACL rules. On kernels lacking the required ipset hash module, ipset creation
+// fails (e.g. "invalid argument"), which would otherwise leave the ACL chain
+// empty and silently drop all policy-permitted inbound traffic. When unsupported,
+// the manager falls back to per-IP iptables rules.
+func (m *aclManager) probeIPSetSupport() bool {
+	// Use a unique name so concurrent processes don't collide and we only ever
+	// destroy the set we created ourselves. ipset names are limited to 31 chars,
+	// so use a short random suffix.
+	probeName := "nb-probe-" + uuid.New().String()[:8]
+
+	opts := ipset.CreateOptions{
+		Replace: true,
+	}
+	if m.v6 {
+		opts.Family = ipset.FamilyIPV6
+	}
+
+	if err := ipset.Create(probeName, ipset.TypeHashNet, opts); err != nil {
+		log.Warnf("ipset is not available (failed to create probe set: %v); "+
+			"falling back to per-IP iptables ACL rules. Ensure the kernel provides "+
+			"the ipset hash:net module (ip_set_hash_net) for better performance with large rule sets", err)
+		return false
+	}
+
+	defer func() {
+		if err := ipset.Destroy(probeName); err != nil {
+			log.Debugf("destroy ipset probe set %q: %v", probeName, err)
+		}
+	}()
+
+	return true
+}
+
 func (m *aclManager) createIPSet(name string) error {
 	opts := ipset.CreateOptions{
 		Replace: true,

client/firewall/iptables/manager_linux_test.go

@@ -291,3 +291,40 @@ func TestIptablesCreatePerformance(t *testing.T) {
 		})
 	}
 }
+
+// TestIptablesACLIPSetFallback verifies that when the kernel lacks ipset support,
+// the ACL manager falls back to per-IP iptables rules (-s <ip>) instead of
+// silently leaving the chain empty. See discussion #6125.
+func TestIptablesACLIPSetFallback(t *testing.T) {
+	ipv4Client, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
+	require.NoError(t, err)
+
+	// Use Create()/Init() so the router-owned chains (chainRTFWDIN/OUT) are
+	// created before the ACL manager's createDefaultChains() references them.
+	manager, err := Create(ifaceMock, iface.DefaultMTU)
+	require.NoError(t, err)
+	require.NoError(t, manager.Init(nil))
+
+	aclMgr := manager.aclMgr
+	// Simulate a kernel without the ipset hash module.
+	aclMgr.ipsetSupported = false
+
+	defer func() {
+		require.NoError(t, manager.Close(nil))
+	}()
+
+	ip := netip.MustParseAddr("10.20.0.42")
+	port := &fw.Port{Values: []uint16{22}}
+
+	rules, err := aclMgr.AddPeerFiltering(nil, ip.AsSlice(), "tcp", nil, port, fw.ActionAccept, "nb0000001")
+	require.NoError(t, err, "AddPeerFiltering should succeed via fallback")
+	require.NotEmpty(t, rules)
+
+	rule := rules[0].(*Rule)
+	require.Empty(t, rule.ipsetName, "fallback rule must not reference an ipset")
+	require.Contains(t, strings.Join(rule.specs, " "), "-s 10.20.0.42", "fallback rule must match by source IP")
+	require.NotContains(t, strings.Join(rule.specs, " "), "--match-set", "fallback rule must not use ipset matching")
+
+	// The rule must actually be present in the ACL chain (not silently dropped).
+	checkRuleSpecs(t, ipv4Client, rule.chain, true, rule.specs...)
+}

client/grpc/dialer_generic.go

@@ -16,47 +16,28 @@ import (
 	"google.golang.org/grpc"
 
 	nbnet "github.com/netbirdio/netbird/client/net"
-	"github.com/netbirdio/netbird/client/netsweep"
 )
 
 func WithCustomDialer(_ bool, _ string) grpc.DialOption {
-	return grpc.WithContextDialer(dialContext)
-}
-
-// WithSweeper dials like WithCustomDialer but registers connections and
-// dials with the sweeper. Append it after WithCustomDialer: gRPC applies
-// dial options in order, so the later context dialer wins.
-func WithSweeper(sweeper *netsweep.Sweeper) grpc.DialOption {
 	return grpc.WithContextDialer(func(ctx context.Context, addr string) (net.Conn, error) {
-		dial := sweeper.StartDial(ctx)
-		defer dial.Release()
+		if runtime.GOOS == "linux" {
+			currentUser, err := user.Current()
+			if err != nil {
+				return nil, status.Errorf(codes.FailedPrecondition, "failed to get current user: %v", err)
+			}
 
-		conn, err := dialContext(dial.Ctx(), addr)
-		if err != nil {
-			return nil, err
+			// the custom dialer requires root permissions which are not required for use cases run as non-root
+			if currentUser.Uid != "0" {
+				log.Debug("Not running as root, using standard dialer")
+				dialer := &net.Dialer{}
+				return dialer.DialContext(ctx, "tcp", addr)
+			}
 		}
-		return dial.WrapConn(conn)
+
+		conn, err := nbnet.NewDialer().DialContext(ctx, "tcp", addr)
+		if err != nil {
+			return nil, fmt.Errorf("nbnet.NewDialer().DialContext: %w", err)
+		}
+		return conn, nil
 	})
 }
-
-func dialContext(ctx context.Context, addr string) (net.Conn, error) {
-	if runtime.GOOS == "linux" {
-		currentUser, err := user.Current()
-		if err != nil {
-			return nil, status.Errorf(codes.FailedPrecondition, "failed to get current user: %v", err)
-		}
-
-		// the custom dialer requires root permissions which are not required for use cases run as non-root
-		if currentUser.Uid != "0" {
-			log.Debug("Not running as root, using standard dialer")
-			dialer := &net.Dialer{}
-			return dialer.DialContext(ctx, "tcp", addr)
-		}
-	}
-
-	conn, err := nbnet.NewDialer().DialContext(ctx, "tcp", addr)
-	if err != nil {
-		return nil, fmt.Errorf("nbnet.NewDialer().DialContext: %w", err)
-	}
-	return conn, nil
-}

client/grpc/dialer_js.go

@@ -3,7 +3,6 @@ package grpc
 import (
 	"google.golang.org/grpc"
 
-	"github.com/netbirdio/netbird/client/netsweep"
 	"github.com/netbirdio/netbird/util/wsproxy/client"
 )
 
@@ -12,8 +11,3 @@ import (
 func WithCustomDialer(tlsEnabled bool, component string) grpc.DialOption {
 	return client.WithWebSocketDialer(tlsEnabled, component)
 }
-
-// WithSweeper is a no-op on WASM/JS: there is no network change signal.
-func WithSweeper(_ *netsweep.Sweeper) grpc.DialOption {
-	return grpc.EmptyDialOption{}
-}

client/grpc/retry.go

@@ -1,49 +0,0 @@
-package grpc
-
-import (
-	"context"
-	"errors"
-	"time"
-
-	"github.com/cenkalti/backoff/v4"
-
-	"github.com/netbirdio/netbird/client/netstate"
-)
-
-// Retry mirrors backoff.Retry, but the sleep between attempts also wakes on
-// OS network availability transitions: an operation cut down by a network
-// change retries the moment the network settles instead of sleeping through
-// the recovery. A nil netState never fires, leaving plain backoff.Retry
-// behavior.
-func Retry(ctx context.Context, operation backoff.Operation, bo backoff.BackOff, netState *netstate.State) error {
-	bo.Reset()
-	for {
-		err := operation()
-		if err == nil {
-			return nil
-		}
-
-		var permanent *backoff.PermanentError
-		if errors.As(err, &permanent) {
-			return permanent.Err
-		}
-
-		next := bo.NextBackOff()
-		if next == backoff.Stop {
-			if cerr := ctx.Err(); cerr != nil {
-				return cerr
-			}
-			return err
-		}
-
-		timer := time.NewTimer(next)
-		select {
-		case <-timer.C:
-		case <-netState.Changed():
-			timer.Stop()
-		case <-ctx.Done():
-			timer.Stop()
-			return ctx.Err()
-		}
-	}
-}

client/grpc/retry_test.go

@@ -1,91 +0,0 @@
-package grpc
-
-import (
-	"context"
-	"errors"
-	"testing"
-	"time"
-
-	"github.com/cenkalti/backoff/v4"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-
-	"github.com/netbirdio/netbird/client/netstate"
-)
-
-func TestRetryWakesOnNetworkChange(t *testing.T) {
-	ns := netstate.New()
-	attempts := 0
-	operation := func() error {
-		attempts++
-		if attempts == 1 {
-			return errors.New("cut by network change")
-		}
-		return nil
-	}
-
-	go func() {
-		time.Sleep(20 * time.Millisecond)
-		ns.Set(false)
-	}()
-
-	start := time.Now()
-	err := Retry(context.Background(), operation, backoff.NewConstantBackOff(time.Minute), ns)
-
-	require.NoError(t, err)
-	assert.Equal(t, 2, attempts)
-	assert.Less(t, time.Since(start), time.Second, "the transition must cut the minute-long sleep short")
-}
-
-func TestRetryPermanentError(t *testing.T) {
-	sentinel := errors.New("permission denied")
-	operation := func() error {
-		return backoff.Permanent(sentinel)
-	}
-
-	err := Retry(context.Background(), operation, backoff.NewConstantBackOff(time.Millisecond), nil)
-	assert.ErrorIs(t, err, sentinel)
-}
-
-func TestRetryNilNetState(t *testing.T) {
-	attempts := 0
-	operation := func() error {
-		attempts++
-		if attempts < 3 {
-			return errors.New("transient")
-		}
-		return nil
-	}
-
-	err := Retry(context.Background(), operation, backoff.NewConstantBackOff(time.Millisecond), nil)
-	require.NoError(t, err)
-	assert.Equal(t, 3, attempts)
-}
-
-func TestRetryStops(t *testing.T) {
-	failure := errors.New("still failing")
-	operation := func() error {
-		return failure
-	}
-
-	err := Retry(context.Background(), operation, &backoff.StopBackOff{}, nil)
-	assert.ErrorIs(t, err, failure)
-}
-
-func TestRetryCtxCancelDuringSleep(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-	operation := func() error {
-		return errors.New("failing")
-	}
-
-	go func() {
-		time.Sleep(20 * time.Millisecond)
-		cancel()
-	}()
-
-	start := time.Now()
-	err := Retry(ctx, operation, backoff.NewConstantBackOff(time.Minute), netstate.New())
-
-	assert.ErrorIs(t, err, context.Canceled)
-	assert.Less(t, time.Since(start), time.Second)
-}

client/internal/connect.go

@@ -38,8 +38,6 @@ import (
 	"github.com/netbirdio/netbird/client/internal/updater"
 	"github.com/netbirdio/netbird/client/internal/updater/installer"
 	nbnet "github.com/netbirdio/netbird/client/net"
-	"github.com/netbirdio/netbird/client/netstate"
-	"github.com/netbirdio/netbird/client/netsweep"
 	cProto "github.com/netbirdio/netbird/client/proto"
 	"github.com/netbirdio/netbird/client/ssh"
 	sshconfig "github.com/netbirdio/netbird/client/ssh/config"
@@ -72,42 +70,18 @@ type ConnectClient struct {
 	updateManager *updater.Manager
 
 	persistSyncResponse bool
-
-	// netState gates every reconnection loop on OS-reported network
-	// availability. Nil (the default) disables gating; mobile platforms
-	// inject it via WithNetworkState.
-	netState *netstate.State
-
-	// sweeper cuts the management, signal and relay connections on network
-	// change; nil disables it.
-	sweeper *netsweep.Sweeper
-}
-
-// ConnectClientOption configures optional ConnectClient behavior.
-type ConnectClientOption func(*ConnectClient)
-
-// WithNetworkState injects the OS network availability state that gates every
-// reconnection loop; without it gating is disabled.
-func WithNetworkState(netState *netstate.State) ConnectClientOption {
-	return func(c *ConnectClient) { c.netState = netState }
-}
-
-// WithSweeper injects the network change sweeper.
-func WithSweeper(sweeper *netsweep.Sweeper) ConnectClientOption {
-	return func(c *ConnectClient) { c.sweeper = sweeper }
 }
 
 func NewConnectClient(
 	ctx context.Context,
 	config *profilemanager.Config,
 	statusRecorder *peer.Status,
-	opts ...ConnectClientOption,
 ) *ConnectClient {
 	// Derive the run context here so Stop owns the cancel that unblocks the run
 	// loop. runCancel is set once at construction, so Stop can call it without
 	// racing the run loop's startup. Callers therefore need not cancel before Stop.
 	runCtx, runCancel := context.WithCancel(ctx)
-	c := &ConnectClient{
+	return &ConnectClient{
 		ctx:            runCtx,
 		runCancel:      runCancel,
 		runExited:      make(chan struct{}),
@@ -115,10 +89,6 @@ func NewConnectClient(
 		statusRecorder: statusRecorder,
 		engineMutex:    sync.Mutex{},
 	}
-	for _, opt := range opts {
-		opt(c)
-	}
-	return c
 }
 
 func (c *ConnectClient) SetUpdateManager(um *updater.Manager) {
@@ -304,13 +274,6 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 			return nil
 		}
 
-		// suspend connection attempts while the OS reports no usable network
-		if waited, err := c.netState.Wait(c.ctx); err != nil {
-			return nil
-		} else if waited {
-			backOff.Reset()
-		}
-
 		state.Set(StatusConnecting)
 
 		engineCtx, cancel := context.WithCancel(c.ctx)
@@ -322,8 +285,7 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 		}()
 
 		log.Debugf("connecting to the Management service %s", c.config.ManagementURL.Host)
-		mgmClient, err := mgm.NewClient(engineCtx, c.config.ManagementURL.Host, myPrivateKey, mgmTlsEnabled,
-			mgm.WithNetworkState(c.netState), mgm.WithSweeper(c.sweeper))
+		mgmClient, err := mgm.NewClient(engineCtx, c.config.ManagementURL.Host, myPrivateKey, mgmTlsEnabled)
 		if err != nil {
 			// On daemon shutdown / Down() the parent context is cancelled
 			// and the dial fails with "context canceled". Wrapping that
@@ -398,7 +360,7 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 		}()
 
 		// with the global Netbird config in hand connect (just a connection, no stream yet) Signal
-		signalClient, err := connectToSignal(engineCtx, loginResp.GetNetbirdConfig(), myPrivateKey, c.netState, c.sweeper)
+		signalClient, err := connectToSignal(engineCtx, loginResp.GetNetbirdConfig(), myPrivateKey)
 		if err != nil {
 			log.Error(err)
 			return wrapErr(err)
@@ -434,8 +396,7 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 			engineConfig.StateDir = filepath.Dir(path)
 		}
 
-		relayManager := relayClient.NewManager(engineCtx, relayURLs, myPrivateKey.PublicKey().String(), engineConfig.MTU,
-			relayClient.WithNetworkState(c.netState), relayClient.WithSweeper(c.sweeper))
+		relayManager := relayClient.NewManager(engineCtx, relayURLs, myPrivateKey.PublicKey().String(), engineConfig.MTU)
 		c.statusRecorder.SetRelayMgr(relayManager)
 		if len(relayURLs) > 0 {
 			if token != nil {
@@ -463,7 +424,6 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 			UpdateManager:  c.updateManager,
 			ClientMetrics:  c.clientMetrics,
 			MetricsCtx:     c.ctx,
-			NetState:       c.netState,
 		}, mobileDependency)
 		engine.SetSyncResponsePersistence(c.persistSyncResponse)
 		c.engine = engine
@@ -520,16 +480,6 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 	// status stream stuck at Connecting.
 	err = backoff.Retry(operation, backoff.WithContext(backOff, c.ctx))
 	if err != nil {
-		// Once the client context is cancelled backoff.WithContext surfaces the
-		// bare context error, and any attempt torn down mid-flight reports the
-		// same. That cancellation is the caller asking us to stop (Stop, Down or
-		// an engine restart), so exit cleanly instead of handing back a failure
-		// the caller would have to distinguish from a real one.
-		if c.ctx.Err() != nil && errors.Is(err, context.Canceled) {
-			log.Info("exiting client retry loop, context cancelled")
-			return nil
-		}
-
 		log.Debugf("exiting client retry loop due to unrecoverable error: %s", err)
 		if s, ok := gstatus.FromError(err); ok && (s.Code() == codes.PermissionDenied) {
 			state.Set(StatusNeedsLogin)
@@ -723,7 +673,7 @@ func selectMTU(localMTU uint16, peerMTU int32) uint16 {
 }
 
 // connectToSignal creates Signal Service client and established a connection
-func connectToSignal(ctx context.Context, wtConfig *mgmProto.NetbirdConfig, ourPrivateKey wgtypes.Key, netState *netstate.State, sweeper *netsweep.Sweeper) (*signal.GrpcClient, error) {
+func connectToSignal(ctx context.Context, wtConfig *mgmProto.NetbirdConfig, ourPrivateKey wgtypes.Key) (*signal.GrpcClient, error) {
 	var sigTLSEnabled bool
 	if wtConfig.Signal.Protocol == mgmProto.HostConfig_HTTPS {
 		sigTLSEnabled = true
@@ -731,8 +681,7 @@ func connectToSignal(ctx context.Context, wtConfig *mgmProto.NetbirdConfig, ourP
 		sigTLSEnabled = false
 	}
 
-	signalClient, err := signal.NewClient(ctx, wtConfig.Signal.Uri, ourPrivateKey, sigTLSEnabled,
-		signal.WithNetworkState(netState), signal.WithSweeper(sweeper))
+	signalClient, err := signal.NewClient(ctx, wtConfig.Signal.Uri, ourPrivateKey, sigTLSEnabled)
 	if err != nil {
 		log.Errorf("error while connecting to the Signal Exchange Service %s: %s", wtConfig.Signal.Uri, err)
 		return nil, gstatus.Errorf(codes.FailedPrecondition, "failed connecting to Signal Service : %s", err)

client/internal/dns/host_darwin.go

@@ -267,18 +267,38 @@ func (s *systemConfigurator) getSystemDNSSettings() (SystemDNSSettings, error) {
 		return SystemDNSSettings{}, fmt.Errorf("sending the command: %w", err)
 	}
 
-	var dnsSettings SystemDNSSettings
+	dnsSettings, serverAddresses, err := parseSystemDNSSettings(b)
+	if err != nil {
+		return dnsSettings, err
+	}
+
+	s.mu.Lock()
+	s.origNameservers = serverAddresses
+	s.mu.Unlock()
+
+	return dnsSettings, nil
+}
+
+// parseSystemDNSSettings parses the output of `scutil show State:/Network/Service/<id>/DNS`.
+// Lines that don't match the expected "index : value" shape are skipped: hosts with unusual
+// network services (e.g. orphaned hardware ports) can produce entries without a value.
+func parseSystemDNSSettings(out []byte) (SystemDNSSettings, []netip.Addr, error) {
+	// port is not exposed by scutil, default to 53
+	dnsSettings := SystemDNSSettings{ServerPort: DefaultPort}
 	var serverAddresses []netip.Addr
 	inSearchDomainsArray := false
 	inServerAddressesArray := false
 
-	scanner := bufio.NewScanner(bytes.NewReader(b))
+	scanner := bufio.NewScanner(bytes.NewReader(out))
 	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)
+			domainName := strings.TrimSpace(strings.TrimPrefix(line, "DomainName :"))
+			if domainName != "" {
+				dnsSettings.Domains = append(dnsSettings.Domains, domainName)
+			}
+			continue
 		case line == "SearchDomains : <array> {":
 			inSearchDomainsArray = true
 			continue
@@ -288,36 +308,45 @@ func (s *systemConfigurator) getSystemDNSSettings() (SystemDNSSettings, error) {
 		case line == "}":
 			inSearchDomainsArray = false
 			inServerAddressesArray = false
+			continue
+		}
+
+		if !inSearchDomainsArray && !inServerAddressesArray {
+			continue
+		}
+
+		parts := strings.SplitN(line, " : ", 2)
+		if len(parts) != 2 {
+			log.Debugf("skipping unexpected scutil DNS line %q", line)
+			continue
+		}
+		value := strings.TrimSpace(parts[1])
+		if value == "" {
+			continue
 		}
 
 		if inSearchDomainsArray {
-			searchDomain := strings.Split(line, " : ")[1]
-			dnsSettings.Domains = append(dnsSettings.Domains, searchDomain)
-		} else if inServerAddressesArray {
-			address := strings.Split(line, " : ")[1]
-			if ip, err := netip.ParseAddr(address); err == nil && !ip.IsUnspecified() {
-				ip = ip.Unmap()
-				serverAddresses = append(serverAddresses, ip)
-				// Prefer the first IPv4 server as ServerIP since our DNS listener is IPv4.
-				if !dnsSettings.ServerIP.IsValid() && ip.Is4() {
-					dnsSettings.ServerIP = ip
-				}
-			}
+			dnsSettings.Domains = append(dnsSettings.Domains, value)
+			continue
+		}
+
+		ip, err := netip.ParseAddr(value)
+		if err != nil || ip.IsUnspecified() {
+			continue
+		}
+		ip = ip.Unmap()
+		serverAddresses = append(serverAddresses, ip)
+		// Prefer the first IPv4 server as ServerIP since our DNS listener is IPv4.
+		if !dnsSettings.ServerIP.IsValid() && ip.Is4() {
+			dnsSettings.ServerIP = ip
 		}
 	}
 
 	if err := scanner.Err(); err != nil {
-		return dnsSettings, err
+		return dnsSettings, serverAddresses, err
 	}
 
-	// default to 53 port
-	dnsSettings.ServerPort = DefaultPort
-
-	s.mu.Lock()
-	s.origNameservers = serverAddresses
-	s.mu.Unlock()
-
-	return dnsSettings, nil
+	return dnsSettings, serverAddresses, nil
 }
 
 func (s *systemConfigurator) getOriginalNameservers() []netip.Addr {
@@ -435,11 +464,15 @@ func (s *systemConfigurator) getPrimaryService() (string, string, error) {
 	router := ""
 	for scanner.Scan() {
 		text := scanner.Text()
+		parts := strings.SplitN(text, ":", 2)
+		if len(parts) != 2 {
+			continue
+		}
 		if strings.Contains(text, "PrimaryService") {
-			primaryService = strings.TrimSpace(strings.Split(text, ":")[1])
+			primaryService = strings.TrimSpace(parts[1])
 		}
 		if strings.Contains(text, "Router") {
-			router = strings.TrimSpace(strings.Split(text, ":")[1])
+			router = strings.TrimSpace(parts[1])
 		}
 	}
 	if err := scanner.Err(); err != nil && err != io.EOF {

client/internal/dns/host_darwin_test.go

@@ -328,6 +328,120 @@ func removeTestDNSKey(key string) error {
 	return err
 }
 
+func TestParseSystemDNSSettings(t *testing.T) {
+	tests := []struct {
+		name            string
+		output          string
+		expectedDomains []string
+		expectedServers []netip.Addr
+		expectedIP      netip.Addr
+	}{
+		{
+			name: "well_formed",
+			output: `<dictionary> {
+  DomainName : example.com
+  SearchDomains : <array> {
+    0 : example.com
+    1 : corp.example.com
+  }
+  ServerAddresses : <array> {
+    0 : 192.168.1.1
+    1 : fd00::53
+  }
+}
+`,
+			expectedDomains: []string{"example.com", "example.com", "corp.example.com"},
+			expectedServers: []netip.Addr{netip.MustParseAddr("192.168.1.1"), netip.MustParseAddr("fd00::53")},
+			expectedIP:      netip.MustParseAddr("192.168.1.1"),
+		},
+		{
+			// entries without a value after the separator used to panic with
+			// "index out of range [1] with length 1"
+			name: "malformed_array_entries_skipped",
+			output: `<dictionary> {
+  SearchDomains : <array> {
+    0 :
+    (null)
+
+    1 : corp.example.com
+  }
+  ServerAddresses : <array> {
+    0 :
+    1 : 192.168.1.1
+  }
+}
+`,
+			expectedDomains: []string{"corp.example.com"},
+			expectedServers: []netip.Addr{netip.MustParseAddr("192.168.1.1")},
+			expectedIP:      netip.MustParseAddr("192.168.1.1"),
+		},
+		{
+			name: "domain_name_without_value_skipped",
+			output: `<dictionary> {
+  DomainName :
+  ServerAddresses : <array> {
+    0 : 192.168.1.1
+  }
+}
+`,
+			expectedServers: []netip.Addr{netip.MustParseAddr("192.168.1.1")},
+			expectedIP:      netip.MustParseAddr("192.168.1.1"),
+		},
+		{
+			name: "ipv6_first_prefers_ipv4_server_ip",
+			output: `<dictionary> {
+  ServerAddresses : <array> {
+    0 : fd00::53
+    1 : 192.168.1.1
+  }
+}
+`,
+			expectedServers: []netip.Addr{netip.MustParseAddr("fd00::53"), netip.MustParseAddr("192.168.1.1")},
+			expectedIP:      netip.MustParseAddr("192.168.1.1"),
+		},
+		{
+			name: "invalid_and_unspecified_addresses_skipped",
+			output: `<dictionary> {
+  ServerAddresses : <array> {
+    0 : (null)
+    1 : 0.0.0.0
+    2 : 192.168.1.1
+  }
+}
+`,
+			expectedServers: []netip.Addr{netip.MustParseAddr("192.168.1.1")},
+			expectedIP:      netip.MustParseAddr("192.168.1.1"),
+		},
+		{
+			name: "v4_mapped_address_unmapped",
+			output: `<dictionary> {
+  ServerAddresses : <array> {
+    0 : ::ffff:192.168.1.1
+  }
+}
+`,
+			expectedServers: []netip.Addr{netip.MustParseAddr("192.168.1.1")},
+			expectedIP:      netip.MustParseAddr("192.168.1.1"),
+		},
+		{
+			name:   "empty_output",
+			output: "",
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			settings, servers, err := parseSystemDNSSettings([]byte(tc.output))
+			require.NoError(t, err, "parsing should not fail")
+
+			assert.Equal(t, tc.expectedDomains, settings.Domains, "domains should match")
+			assert.Equal(t, tc.expectedServers, servers, "server addresses should match")
+			assert.Equal(t, tc.expectedIP, settings.ServerIP, "server IP should match")
+			assert.Equal(t, DefaultPort, settings.ServerPort, "server port should default to 53")
+		})
+	}
+}
+
 func TestGetOriginalNameservers(t *testing.T) {
 	configurator := &systemConfigurator{
 		createdKeys: make(map[string]struct{}),

client/internal/engine.go

@@ -59,7 +59,6 @@ import (
 	"github.com/netbirdio/netbird/client/internal/syncstore"
 	"github.com/netbirdio/netbird/client/internal/updater"
 	"github.com/netbirdio/netbird/client/jobexec"
-	"github.com/netbirdio/netbird/client/netstate"
 	cProto "github.com/netbirdio/netbird/client/proto"
 	"github.com/netbirdio/netbird/client/system"
 	nbdns "github.com/netbirdio/netbird/dns"
@@ -182,9 +181,6 @@ type EngineServices struct {
 	UpdateManager  *updater.Manager
 	ClientMetrics  *metrics.ClientMetrics
 	MetricsCtx     context.Context
-	// NetState gates the reconnection loops on OS-reported network
-	// availability; nil disables gating.
-	NetState *netstate.State
 }
 
 // Engine is a mechanism responsible for reacting on Signal and Management stream events and managing connections to the remote peers.
@@ -208,10 +204,6 @@ type Engine struct {
 	config    *EngineConfig
 	mobileDep MobileDependency
 
-	// netState gates the peer reconnection guards on OS-reported network
-	// availability; nil disables gating.
-	netState *netstate.State
-
 	// STUNs is a list of STUN servers used by ICE
 	STUNs []*stun.URI
 	// TURNs is a list of STUN servers used by ICE
@@ -345,7 +337,6 @@ func NewEngine(
 		syncMsgMux:         &sync.Mutex{},
 		config:             config,
 		mobileDep:          mobileDep,
-		netState:           services.NetState,
 		STUNs:              []*stun.URI{},
 		TURNs:              []*stun.URI{},
 		networkSerial:      0,
@@ -1902,8 +1893,7 @@ func (e *Engine) createPeerConn(pubKey string, allowedIPs []netip.Prefix, agentV
 			Addr:           e.getRosenpassAddr(),
 			PermissiveMode: e.config.RosenpassPermissive,
 		},
-		ICEConfig:    e.createICEConfig(),
-		NetworkState: e.netState,
+		ICEConfig: e.createICEConfig(),
 	}
 
 	serviceDependencies := peer.ServiceDependencies{

client/internal/peer/conn.go

@@ -26,7 +26,6 @@ import (
 	"github.com/netbirdio/netbird/client/internal/portforward"
 	"github.com/netbirdio/netbird/client/internal/rosenpass"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
-	"github.com/netbirdio/netbird/client/netstate"
 	"github.com/netbirdio/netbird/route"
 	relayClient "github.com/netbirdio/netbird/shared/relay/client"
 )
@@ -94,10 +93,6 @@ type ConnConfig struct {
 
 	// ICEConfig ICE protocol configuration
 	ICEConfig icemaker.Config
-
-	// NetworkState gates the reconnection guard on OS-reported network
-	// availability; nil disables gating.
-	NetworkState *netstate.State
 }
 
 type Conn struct {
@@ -259,7 +254,7 @@ func (conn *Conn) open(engineCtx context.Context, firstPacket []byte) error {
 		conn.handshaker.AddICEListener(conn.workerICE.OnNewOffer)
 	}
 
-	conn.guard = guard.NewGuard(conn.Log, conn.isConnectedOnAllWay, conn.config.Timeout, conn.srWatcher, conn.config.NetworkState)
+	conn.guard = guard.NewGuard(conn.Log, conn.isConnectedOnAllWay, conn.config.Timeout, conn.srWatcher)
 
 	conn.wg.Add(1)
 	go func() {

client/internal/peer/guard/guard.go

@@ -6,8 +6,6 @@ import (
 
 	"github.com/cenkalti/backoff/v4"
 	log "github.com/sirupsen/logrus"
-
-	"github.com/netbirdio/netbird/client/netstate"
 )
 
 // ConnStatus represents the connection state as seen by the guard.
@@ -33,26 +31,20 @@ type connStatusFunc func() ConnStatus
 // - Relayed connection disconnected
 // - ICE candidate changes
 type Guard struct {
-	log                 *log.Entry
-	isConnectedOnAllWay connStatusFunc
-	timeout             time.Duration
-	srWatcher           *SRWatcher
-	// netState gates reconnect attempts on OS-reported network availability;
-	// nil disables gating.
-	netState                *netstate.State
+	log                     *log.Entry
+	isConnectedOnAllWay     connStatusFunc
+	timeout                 time.Duration
+	srWatcher               *SRWatcher
 	relayedConnDisconnected chan struct{}
 	iCEConnDisconnected     chan struct{}
 }
 
-// NewGuard creates a reconnection guard for a peer connection. A nil netState
-// disables network availability gating.
-func NewGuard(log *log.Entry, isConnectedFn connStatusFunc, timeout time.Duration, srWatcher *SRWatcher, netState *netstate.State) *Guard {
+func NewGuard(log *log.Entry, isConnectedFn connStatusFunc, timeout time.Duration, srWatcher *SRWatcher) *Guard {
 	return &Guard{
 		log:                     log,
 		isConnectedOnAllWay:     isConnectedFn,
 		timeout:                 timeout,
 		srWatcher:               srWatcher,
-		netState:                netState,
 		relayedConnDisconnected: make(chan struct{}, 1),
 		iCEConnDisconnected:     make(chan struct{}, 1),
 	}
@@ -104,16 +96,9 @@ func (g *Guard) reconnectLoopWithRetry(ctx context.Context, callback func()) {
 	iceState := &iceRetryState{log: g.log}
 	defer iceState.reset()
 
-	netChanged := g.netState.Changed()
-
 	for {
 		select {
 		case <-tickerChannel:
-			// skip attempts while the OS reports no usable network; the
-			// netChanged case below resumes the loop once it returns
-			if !g.netState.IsOnline() {
-				continue
-			}
 			switch g.isConnectedOnAllWay() {
 			case ConnStatusConnected:
 				// all good, nothing to do
@@ -150,23 +135,6 @@ func (g *Guard) reconnectLoopWithRetry(ctx context.Context, callback func()) {
 			tickerChannel = ticker.C
 			iceState.reset()
 
-		case <-netChanged:
-			// Re-arm for the next transition before acting on this one.
-			netChanged = g.netState.Changed()
-			if !g.netState.IsOnline() {
-				continue
-			}
-			// Ticks skipped while offline drove the backoff towards its
-			// maximum without ever attempting, and left the ICE budget
-			// frozen — possibly in hourly mode. Recover on our own so the
-			// peer does not depend on a signal or relay event that never
-			// comes when both stayed up across the outage.
-			g.log.Debugf("network is back, reset reconnection ticker")
-			ticker.Stop()
-			ticker = g.newReconnectTicker(ctx)
-			tickerChannel = ticker.C
-			iceState.reset()
-
 		case <-ctx.Done():
 			g.log.Debugf("context is done, stop reconnect loop")
 			return

client/internal/peer/guard/guard_leak_test.go

@@ -15,7 +15,7 @@ import (
 
 func newTestGuard(status connStatusFunc) *Guard {
 	srw := NewSRWatcher(nil, nil, nil, ice.Config{})
-	return NewGuard(log.WithField("test", "guard"), status, 50*time.Millisecond, srw, nil)
+	return NewGuard(log.WithField("test", "guard"), status, 50*time.Millisecond, srw)
 }
 
 // countBackoffTickerGoroutines returns how many goroutines are currently sitting

client/internal/peer/guard/guard_netstate_test.go

@@ -1,107 +0,0 @@
-package guard
-
-import (
-	"context"
-	"sync/atomic"
-	"testing"
-	"time"
-
-	log "github.com/sirupsen/logrus"
-
-	"github.com/netbirdio/netbird/client/internal/peer/ice"
-	"github.com/netbirdio/netbird/client/netstate"
-)
-
-// newTestGuardWithNetState builds a guard with a realistic MaxInterval: the
-// backoff must be able to grow well past the outage, as it does in production
-// where the timeout is seconds to minutes.
-func newTestGuardWithNetState(status connStatusFunc, netState *netstate.State) *Guard {
-	srw := NewSRWatcher(nil, nil, nil, ice.Config{})
-	return NewGuard(log.WithField("test", "guard"), status, 30*time.Second, srw, netState)
-}
-
-// TestGuard_RecoversAfterOfflineToOnline covers a peer that stays disconnected
-// across a network outage while neither signal nor relay reports an event —
-// both stayed up, as on a short airplane mode toggle over Wi-Fi.
-//
-// Every tick taken while offline is skipped, but it still advances the
-// exponential backoff, so by the time the network returns the next tick can be
-// tens of seconds away. Without an explicit reaction to the transition the
-// peer waits out that interval for a recovery that could start immediately.
-func TestGuard_RecoversAfterOfflineToOnline(t *testing.T) {
-	netState := netstate.New()
-
-	var attempts atomic.Int32
-	g := newTestGuardWithNetState(func() ConnStatus { return ConnStatusDisconnected }, netState)
-
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-	// Start from the reconnect ticker (800ms initial interval), the state a
-	// peer is in after it loses its connection.
-	go g.Start(ctx, func() { attempts.Add(1) })
-	g.SetRelayedConnDisconnected()
-
-	// Let the backoff climb: 0.8s, 1.6s, 3.2s, 6.4s ... every tick is skipped
-	// while offline, but each one doubles the wait for the next.
-	netState.Set(false)
-	time.Sleep(8 * time.Second)
-
-	offlineAttempts := attempts.Load()
-	if offlineAttempts != 0 {
-		t.Fatalf("callback ran %d times while offline, want 0", offlineAttempts)
-	}
-
-	netState.Set(true)
-
-	// The next organic tick is now several seconds out, so anything within
-	// this window can only come from reacting to the transition itself.
-	pollCtx, stopPolling := context.WithTimeout(ctx, 2*time.Second)
-	defer stopPolling()
-
-	select {
-	case <-pollCtx.Done():
-		t.Fatal("peer was not retried within 2s of the network coming back, " +
-			"with neither a signal nor a relay event to fall back on")
-	case <-pollUntil(pollCtx, func() bool { return attempts.Load() > 0 }):
-	}
-}
-
-// TestGuard_OfflineTransitionDoesNotRetry checks the other direction: going
-// offline must not itself trigger an attempt.
-func TestGuard_OfflineTransitionDoesNotRetry(t *testing.T) {
-	netState := netstate.New()
-
-	var attempts atomic.Int32
-	g := newTestGuardWithNetState(func() ConnStatus { return ConnStatusDisconnected }, netState)
-
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-	go g.Start(ctx, func() { attempts.Add(1) })
-
-	netState.Set(false)
-	time.Sleep(5 * time.Second)
-
-	if got := attempts.Load(); got != 0 {
-		t.Fatalf("callback ran %d times after going offline, want 0", got)
-	}
-}
-
-// pollUntil closes the returned channel once cond holds. It gives up when ctx
-// is done, so the polling goroutine never outlives the test that started it.
-func pollUntil(ctx context.Context, cond func() bool) <-chan struct{} {
-	done := make(chan struct{})
-	go func() {
-		for {
-			if cond() {
-				close(done)
-				return
-			}
-			select {
-			case <-ctx.Done():
-				return
-			case <-time.After(10 * time.Millisecond):
-			}
-		}
-	}()
-	return done
-}

client/internal/peer/listener.go

@@ -1,40 +1,11 @@
 package peer
 
-// ClientState identifies the client connection state delivered via
-// Listener.OnStateChanged.
-type ClientState int
-
-// Client states. The numeric values cross the gomobile boundary (the mobile
-// bindings re-export them as integer constants), so they are a wire format:
-// append new states at the end, never reorder or insert.
-const (
-	ClientStateDisconnected ClientState = iota
-	ClientStateConnected
-	ClientStateConnecting
-	ClientStateDisconnecting
-	// ClientStateNoNetwork is an overlay state: it is never stored as the
-	// last notification, only derived from ClientStateConnecting while the
-	// OS reports no usable network (see notifier.effectiveState).
-	ClientStateNoNetwork
-)
-
 // Listener is a callback type about the NetBird network connection state
 type Listener interface {
-	// OnStateChanged reports every client state transition. New states are
-	// delivered only through this callback; the per-state callbacks below
-	// are kept for compatibility and will be removed once all consumers
-	// have migrated.
-	OnStateChanged(state ClientState)
-
-	// Deprecated: consume OnStateChanged instead.
 	OnConnected()
-	// Deprecated: consume OnStateChanged instead.
 	OnDisconnected()
-	// Deprecated: consume OnStateChanged instead.
 	OnConnecting()
-	// Deprecated: consume OnStateChanged instead.
 	OnDisconnecting()
-
 	OnAddressChanged(string, string)
 	OnPeersListChanged(int)
 }

client/internal/peer/notifier.go

@@ -4,64 +4,31 @@ import (
 	"sync"
 )
 
+const (
+	stateDisconnected = iota
+	stateConnected
+	stateConnecting
+	stateDisconnecting
+)
+
 type notifier struct {
-	// publishLock orders state publication: it is held across computing the
-	// effective state and handing it to the listener, so a transition cannot
-	// overtake a newer one and leave the listener on a stale state.
-	publishLock        sync.Mutex
 	serverStateLock    sync.Mutex
 	listenersLock      sync.Mutex
 	listener           Listener
 	currentClientState bool
-	lastNotification   ClientState
+	lastNotification   int
 	lastNumberOfPeers  int
 	lastFqdnAddress    string
 	lastIPAddress      string
-	networkAvailable   bool
 }
 
 func newNotifier() *notifier {
-	return &notifier{
-		networkAvailable: true,
-	}
-}
-
-// effectiveState maps the computed state to what listeners should see:
-// while the OS reports no usable network, "Connecting" would be a lie —
-// connection attempts are suspended — so it is reported as NoNetwork.
-// Caller must hold serverStateLock.
-func (n *notifier) effectiveState(state ClientState) ClientState {
-	if !n.networkAvailable && state == ClientStateConnecting {
-		return ClientStateNoNetwork
-	}
-	return state
-}
-
-// setNetworkAvailable records the OS network availability and re-notifies
-// the listener when the flag flips the effective state (Connecting <->
-// NoNetwork).
-func (n *notifier) setNetworkAvailable(available bool) {
-	n.publishLock.Lock()
-	defer n.publishLock.Unlock()
-
-	n.serverStateLock.Lock()
-	if n.networkAvailable == available {
-		n.serverStateLock.Unlock()
-		return
-	}
-	previous := n.effectiveState(n.lastNotification)
-	n.networkAvailable = available
-	current := n.effectiveState(n.lastNotification)
-	n.serverStateLock.Unlock()
-
-	if previous != current {
-		n.notify(current)
-	}
+	return &notifier{}
 }
 
 func (n *notifier) setListener(listener Listener) {
 	n.serverStateLock.Lock()
-	lastNotification := n.effectiveState(n.lastNotification)
+	lastNotification := n.lastNotification
 	numOfPeers := n.lastNumberOfPeers
 	fqdnAddress := n.lastFqdnAddress
 	address := n.lastIPAddress
@@ -85,9 +52,6 @@ func (n *notifier) removeListener() {
 }
 
 func (n *notifier) updateServerStates(mgmState bool, signalState bool) {
-	n.publishLock.Lock()
-	defer n.publishLock.Unlock()
-
 	n.serverStateLock.Lock()
 	calculatedState := n.calculateState(mgmState, signalState)
 
@@ -97,54 +61,43 @@ func (n *notifier) updateServerStates(mgmState bool, signalState bool) {
 	}
 
 	n.lastNotification = calculatedState
-	effective := n.effectiveState(calculatedState)
 	n.serverStateLock.Unlock()
 
-	n.notify(effective)
+	n.notify(calculatedState)
 }
 
 func (n *notifier) clientStart() {
-	n.publishLock.Lock()
-	defer n.publishLock.Unlock()
-
 	n.serverStateLock.Lock()
 	n.currentClientState = true
-	n.lastNotification = ClientStateConnecting
-	effective := n.effectiveState(ClientStateConnecting)
+	n.lastNotification = stateConnecting
 	n.serverStateLock.Unlock()
 
-	n.notify(effective)
+	n.notify(stateConnecting)
 }
 
 func (n *notifier) clientStop() {
-	n.publishLock.Lock()
-	defer n.publishLock.Unlock()
-
 	n.serverStateLock.Lock()
 	n.currentClientState = false
-	n.lastNotification = ClientStateDisconnected
+	n.lastNotification = stateDisconnected
 	n.serverStateLock.Unlock()
 
-	n.notify(ClientStateDisconnected)
+	n.notify(stateDisconnected)
 }
 
 func (n *notifier) clientTearDown() {
-	n.publishLock.Lock()
-	defer n.publishLock.Unlock()
-
 	n.serverStateLock.Lock()
 	n.currentClientState = false
-	n.lastNotification = ClientStateDisconnecting
+	n.lastNotification = stateDisconnecting
 	n.serverStateLock.Unlock()
 
-	n.notify(ClientStateDisconnecting)
+	n.notify(stateDisconnecting)
 }
 
-func (n *notifier) isServerStateChanged(newState ClientState) bool {
+func (n *notifier) isServerStateChanged(newState int) bool {
 	return n.lastNotification != newState
 }
 
-func (n *notifier) notify(state ClientState) {
+func (n *notifier) notify(state int) {
 	n.listenersLock.Lock()
 	listener := n.listener
 	n.listenersLock.Unlock()
@@ -156,20 +109,20 @@ func (n *notifier) notify(state ClientState) {
 	notifyListener(listener, state)
 }
 
-func (n *notifier) calculateState(managementConn, signalConn bool) ClientState {
+func (n *notifier) calculateState(managementConn, signalConn bool) int {
 	if managementConn && signalConn {
-		return ClientStateConnected
+		return stateConnected
 	}
 
 	if !managementConn && !signalConn && !n.currentClientState {
-		return ClientStateDisconnected
+		return stateDisconnected
 	}
 
-	if n.lastNotification == ClientStateDisconnecting {
-		return ClientStateDisconnecting
+	if n.lastNotification == stateDisconnecting {
+		return stateDisconnecting
 	}
 
-	return ClientStateConnecting
+	return stateConnecting
 }
 
 func (n *notifier) peerListChanged(numOfPeers int) {
@@ -206,19 +159,15 @@ func (n *notifier) localAddressChanged(fqdn, address string) {
 	listener.OnAddressChanged(fqdn, address)
 }
 
-func notifyListener(l Listener, state ClientState) {
-	// legacy per-state callbacks; NoNetwork is delivered only via
-	// OnStateChanged below
+func notifyListener(l Listener, state int) {
 	switch state {
-	case ClientStateDisconnected:
+	case stateDisconnected:
 		l.OnDisconnected()
-	case ClientStateConnected:
+	case stateConnected:
 		l.OnConnected()
-	case ClientStateConnecting:
+	case stateConnecting:
 		l.OnConnecting()
-	case ClientStateDisconnecting:
+	case stateDisconnecting:
 		l.OnDisconnecting()
 	}
-
-	l.OnStateChanged(state)
 }

client/internal/peer/notifier_concurrent_test.go

@@ -1,108 +0,0 @@
-package peer
-
-import (
-	"sync"
-	"testing"
-	"time"
-)
-
-type recordingListener struct {
-	mu      sync.Mutex
-	states  []ClientState
-	onState func(ClientState)
-}
-
-func (l *recordingListener) OnStateChanged(state ClientState) {
-	l.mu.Lock()
-	l.states = append(l.states, state)
-	hook := l.onState
-	l.mu.Unlock()
-
-	if hook != nil {
-		hook(state)
-	}
-}
-
-func (l *recordingListener) last() (ClientState, bool) {
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	if len(l.states) == 0 {
-		return 0, false
-	}
-	return l.states[len(l.states)-1], true
-}
-
-func (l *recordingListener) snapshot() []ClientState {
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	return append([]ClientState(nil), l.states...)
-}
-
-func (l *recordingListener) OnConnected()                    {}
-func (l *recordingListener) OnDisconnected()                 {}
-func (l *recordingListener) OnConnecting()                   {}
-func (l *recordingListener) OnDisconnecting()                {}
-func (l *recordingListener) OnAddressChanged(string, string) {}
-func (l *recordingListener) OnPeersListChanged(int)          {}
-
-// TestNotifier_ConcurrentAvailabilityFlipOrdersPublication holds the first
-// transition inside the listener callback and flips availability again from
-// another goroutine while it is parked. The second flip must not publish
-// ahead of the one in flight, otherwise the listener ends up on a state the
-// notifier already superseded.
-func TestNotifier_ConcurrentAvailabilityFlipOrdersPublication(t *testing.T) {
-	n := newNotifier()
-	n.currentClientState = true
-	n.lastNotification = ClientStateConnecting
-
-	entered := make(chan struct{})
-	release := make(chan struct{})
-
-	l := &recordingListener{}
-	l.onState = func(state ClientState) {
-		if state != ClientStateNoNetwork {
-			return
-		}
-		l.mu.Lock()
-		l.onState = nil
-		l.mu.Unlock()
-		close(entered)
-		<-release
-	}
-	n.listener = l
-
-	var wg sync.WaitGroup
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		n.setNetworkAvailable(false)
-	}()
-
-	<-entered
-
-	flipped := make(chan struct{})
-	go func() {
-		defer close(flipped)
-		n.setNetworkAvailable(true)
-	}()
-
-	select {
-	case <-flipped:
-		t.Fatal("the online transition published while the offline one was " +
-			"still in flight; publication is not serialized")
-	case <-time.After(200 * time.Millisecond):
-	}
-
-	close(release)
-	<-flipped
-	wg.Wait()
-
-	got, ok := l.last()
-	if !ok {
-		t.Fatal("listener never observed a state")
-	}
-	if got != ClientStateConnecting {
-		t.Fatalf("listener holds %v after the network came back, want Connecting; sequence: %v",
-			got, l.snapshot())
-	}
-}

client/internal/peer/notifier_test.go

@@ -6,32 +6,29 @@ import (
 )
 
 type mocListener struct {
-	lastState ClientState
+	lastState int
 	wg        sync.WaitGroup
 	peersWg   sync.WaitGroup
 	peers     int
 }
 
 func (l *mocListener) OnConnected() {
-	l.lastState = ClientStateConnected
+	l.lastState = stateConnected
 	l.wg.Done()
 }
 func (l *mocListener) OnDisconnected() {
-	l.lastState = ClientStateDisconnected
+	l.lastState = stateDisconnected
 	l.wg.Done()
 }
 func (l *mocListener) OnConnecting() {
-	l.lastState = ClientStateConnecting
+	l.lastState = stateConnecting
 	l.wg.Done()
 }
 func (l *mocListener) OnDisconnecting() {
-	l.lastState = ClientStateDisconnecting
+	l.lastState = stateDisconnecting
 	l.wg.Done()
 }
 
-func (l *mocListener) OnStateChanged(state ClientState) {
-
-}
 func (l *mocListener) OnAddressChanged(host, addr string) {
 
 }
@@ -60,15 +57,15 @@ func Test_notifier_serverState(t *testing.T) {
 
 	type scenario struct {
 		name        string
-		expected    ClientState
+		expected    int
 		mgmState    bool
 		signalState bool
 	}
 	scenarios := []scenario{
-		{"connected", ClientStateConnected, true, true},
-		{"mgm down", ClientStateConnecting, false, true},
-		{"signal down", ClientStateConnecting, true, false},
-		{"disconnected", ClientStateDisconnected, false, false},
+		{"connected", stateConnected, true, true},
+		{"mgm down", stateConnecting, false, true},
+		{"signal down", stateConnecting, true, false},
+		{"disconnected", stateDisconnected, false, false},
 	}
 
 	for _, tt := range scenarios {
@@ -88,7 +85,7 @@ func Test_notifier_SetListener(t *testing.T) {
 	listener.setPeersWaiter()
 
 	n := newNotifier()
-	n.lastNotification = ClientStateConnecting
+	n.lastNotification = stateConnecting
 	n.setListener(listener)
 	listener.wait()
 	listener.waitPeers()
@@ -102,7 +99,7 @@ func Test_notifier_RemoveListener(t *testing.T) {
 	listener.setWaiter()
 	listener.setPeersWaiter()
 	n := newNotifier()
-	n.lastNotification = ClientStateConnecting
+	n.lastNotification = stateConnecting
 	n.setListener(listener)
 	// setListener replays cached state on a goroutine; wait for both the state
 	// and peers callbacks to finish so we don't race on listener.peers.

client/internal/peer/status.go

@@ -1211,12 +1211,6 @@ func (d *Status) ClientTeardown() {
 	d.notifyStateChange()
 }
 
-// SetNetworkAvailable records the OS-reported network availability; while
-// unavailable, listeners see NoNetwork instead of Connecting.
-func (d *Status) SetNetworkAvailable(available bool) {
-	d.notifier.setNetworkAvailable(available)
-}
-
 // SetConnectionListener set a listener to the notifier
 func (d *Status) SetConnectionListener(listener Listener) {
 	d.notifier.setListener(listener)

client/ios/NetBirdSDK/client.go

@@ -22,8 +22,6 @@ import (
 	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/client/internal/profilemanager"
-	"github.com/netbirdio/netbird/client/netstate"
-	"github.com/netbirdio/netbird/client/netsweep"
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/formatter"
 	"github.com/netbirdio/netbird/route"
@@ -38,6 +36,11 @@ const (
 	AnonymizeLevelStrict  = nbAnonymize.LevelStrictString
 )
 
+// ConnectionListener export internal Listener for mobile
+type ConnectionListener interface {
+	peer.Listener
+}
+
 // RouteListener export internal RouteListener for mobile
 type NetworkChangeListener interface {
 	listener.NetworkChangeListener
@@ -84,12 +87,6 @@ type Client struct {
 	onHostDnsFn           func([]string)
 	dnsManager            dns.IosDnsManager
 	loginComplete         bool
-	// netState outlives engine restarts: it mirrors the OS connectivity, not
-	// the engine lifecycle. Run injects it into each new ConnectClient, which
-	// distributes it to every reconnection loop.
-	netState *netstate.State
-	// sweeper also outlives engine restarts; NotifyNetworkChange sweeps it.
-	sweeper *netsweep.Sweeper
 	// preloadedConfig holds config loaded from JSON (used on tvOS where file writes are blocked)
 	preloadedConfig *profilemanager.Config
 
@@ -112,8 +109,6 @@ func NewClient(cfgFile, stateFile, cacheDir, logFilePath, deviceName string, osV
 		ctxCancelLock:         &sync.Mutex{},
 		networkChangeListener: networkChangeListener,
 		dnsManager:            dnsManager,
-		netState:              netstate.New(),
-		sweeper:               netsweep.New(),
 	}
 }
 
@@ -189,8 +184,7 @@ func (c *Client) Run(fd int32, interfaceName string, envList *EnvList) error {
 	c.onHostDnsFn = func([]string) {}
 	cfg.WgIface = interfaceName
 
-	connectClient := internal.NewConnectClient(ctx, cfg, c.recorder,
-		internal.WithNetworkState(c.netState), internal.WithSweeper(c.sweeper))
+	connectClient := internal.NewConnectClient(ctx, cfg, c.recorder)
 	c.setState(cfg, connectClient)
 	// Persist the latest sync response so DebugBundle can include the network
 	// map. On iOS this is backed by disk to keep it out of the constrained
@@ -199,25 +193,6 @@ func (c *Client) Run(fd int32, interfaceName string, envList *EnvList) error {
 	return connectClient.RunOniOS(fd, c.networkChangeListener, c.dnsManager, c.stateFile, c.cacheDir, c.logFilePath)
 }
 
-// SetNetworkAvailable feeds OS-reported network availability into the client
-// (e.g. from NWPathMonitor). While unavailable, the internal reconnect loops
-// suspend their attempts and the connection listener reports NoNetwork
-// instead of Connecting; when availability returns, the loops resume
-// immediately with a fresh backoff.
-func (c *Client) SetNetworkAvailable(available bool) {
-	c.netState.Set(available)
-	c.recorder.SetNetworkAvailable(available)
-}
-
-// NotifyNetworkChange marks the management, signal and relay connections
-// stale after the OS switched networks and schedules a sweep that cuts
-// whatever has not redialed on the new network by then. The engine and the
-// TUN device stay untouched.
-func (c *Client) NotifyNetworkChange() {
-	c.sweeper.MarkNetworkChange()
-	log.Infof("network change: connections marked stale")
-}
-
 // Stop the internal client and free the resources
 func (c *Client) Stop() {
 	c.ctxCancelLock.Lock()
@@ -356,11 +331,7 @@ func (c *Client) GetStatusDetails() *StatusDetails {
 
 // SetConnectionListener set the network connection listener
 func (c *Client) SetConnectionListener(listener ConnectionListener) {
-	if listener == nil {
-		c.recorder.RemoveConnectionListener()
-		return
-	}
-	c.recorder.SetConnectionListener(connectionListenerAdapter{listener})
+	c.recorder.SetConnectionListener(listener)
 }
 
 // RemoveConnectionListener remove connection listener

client/ios/NetBirdSDK/connection_listener.go

@@ -1,43 +0,0 @@
-//go:build ios
-
-package NetBirdSDK
-
-import (
-	"github.com/netbirdio/netbird/client/internal/peer"
-)
-
-// Client state values, re-exported as basic constants so gomobile emits them
-// into the generated bindings. They mirror peer.ClientState*: append-only,
-// never reorder.
-const (
-	ClientStateDisconnected  = int(peer.ClientStateDisconnected)
-	ClientStateConnected     = int(peer.ClientStateConnected)
-	ClientStateConnecting    = int(peer.ClientStateConnecting)
-	ClientStateDisconnecting = int(peer.ClientStateDisconnecting)
-	ClientStateNoNetwork     = int(peer.ClientStateNoNetwork)
-)
-
-// ConnectionListener export internal Listener for mobile.
-//
-// It intentionally lacks OnStateChanged for now: adding a method to a gomobile
-// interface breaks every Swift implementation, so the iOS app keeps building
-// against the legacy per-state callbacks. A follow-up will extend it together
-// with the app.
-type ConnectionListener interface {
-	OnConnected()
-	OnDisconnected()
-	OnConnecting()
-	OnDisconnecting()
-	OnAddressChanged(string, string)
-	OnPeersListChanged(int)
-}
-
-// connectionListenerAdapter adapts the gomobile-facing ConnectionListener to
-// peer.Listener.
-type connectionListenerAdapter struct {
-	ConnectionListener
-}
-
-// OnStateChanged is dropped on iOS until the app adopts the state callback;
-// the legacy per-state callbacks continue to fire.
-func (a connectionListenerAdapter) OnStateChanged(peer.ClientState) {}

client/netstate/netstate.go

@@ -1,107 +0,0 @@
-// Package netstate tracks OS-reported network availability for the client.
-//
-// A State instance is owned by the platform integration (e.g. the Android or
-// iOS bindings, fed from ConnectivityManager callbacks or NWPathMonitor) and
-// is injected into the connection retry loops (management, signal, relay,
-// peer guards and the top-level connect loop), which consult it to avoid
-// burning CPU and battery on reconnect attempts while the device has no
-// network at all (e.g. airplane mode), and to reset their backoff as soon as
-// the network returns.
-//
-// Consumers hold a *State that may be nil — every non-mobile platform leaves
-// it unset. The read methods are safe on a nil receiver: they report online
-// and never block, so consumers behave as if this package did not exist.
-package netstate
-
-import (
-	"context"
-	"sync"
-
-	log "github.com/sirupsen/logrus"
-)
-
-// State holds the OS-reported network availability. The zero value is not
-// usable; create instances with New.
-type State struct {
-	mu      sync.Mutex
-	online  bool
-	changed chan struct{}
-}
-
-// New creates a State that starts online.
-func New() *State {
-	return &State{
-		online:  true,
-		changed: make(chan struct{}),
-	}
-}
-
-// Set records whether the OS reports any usable network. Transitions wake up
-// all Wait callers immediately.
-func (s *State) Set(online bool) {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	if s.online == online {
-		return
-	}
-	s.online = online
-	close(s.changed)
-	s.changed = make(chan struct{})
-	log.Infof("OS network availability changed: online=%t", online)
-}
-
-// IsOnline reports whether the OS reports at least one usable network. On a
-// nil receiver — no State injected — it reports online.
-func (s *State) IsOnline() bool {
-	if s == nil {
-		return true
-	}
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	return s.online
-}
-
-// Changed returns a channel closed on the next availability transition, for
-// callers that already own a select loop and cannot block in Wait. Re-read it
-// after every fire: each transition installs a fresh channel. On a nil
-// receiver — no State injected — it returns nil, which blocks forever in a
-// select, so the caller simply never observes a transition.
-func (s *State) Changed() <-chan struct{} {
-	if s == nil {
-		return nil
-	}
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	return s.changed
-}
-
-// Wait blocks while the network is offline. It reports whether it had to
-// wait, so callers can reset their backoff after an outage. It returns early
-// with the context error when ctx is done. On a nil receiver — no State
-// injected — it returns immediately.
-func (s *State) Wait(ctx context.Context) (bool, error) {
-	if s == nil {
-		return false, nil
-	}
-	waited := false
-	for {
-		s.mu.Lock()
-		if s.online {
-			s.mu.Unlock()
-			return waited, nil
-		}
-		ch := s.changed
-		s.mu.Unlock()
-
-		if !waited {
-			waited = true
-			log.Debugf("network is offline, pausing connection attempts")
-		}
-
-		select {
-		case <-ctx.Done():
-			return waited, ctx.Err()
-		case <-ch:
-		}
-	}
-}

client/netstate/netstate_test.go

@@ -1,170 +0,0 @@
-package netstate
-
-import (
-	"context"
-	"sync"
-	"testing"
-	"time"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func TestNewStateIsOnline(t *testing.T) {
-	assert.True(t, New().IsOnline(), "a fresh State should start online")
-}
-
-func TestSetTogglesOnlineState(t *testing.T) {
-	s := New()
-
-	s.Set(false)
-	assert.False(t, s.IsOnline(), "state should be offline after Set(false)")
-
-	s.Set(true)
-	assert.True(t, s.IsOnline(), "state should be online after Set(true)")
-}
-
-func TestWaitReturnsImmediatelyWhenOnline(t *testing.T) {
-	s := New()
-
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
-	defer cancel()
-
-	waited, err := s.Wait(ctx)
-	require.NoError(t, err)
-	assert.False(t, waited, "Wait should not block when the network is online")
-}
-
-func TestWaitBlocksUntilOnline(t *testing.T) {
-	s := New()
-	s.Set(false)
-
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-
-	result := make(chan bool, 1)
-	go func() {
-		waited, err := s.Wait(ctx)
-		if err != nil {
-			result <- false
-			return
-		}
-		result <- waited
-	}()
-
-	// Verify Wait is actually blocking while offline
-	select {
-	case <-result:
-		t.Fatal("Wait should block while the network is offline")
-	case <-time.After(100 * time.Millisecond):
-	}
-
-	s.Set(true)
-
-	select {
-	case waited := <-result:
-		assert.True(t, waited, "Wait should report that it had to wait for the network")
-	case <-time.After(2 * time.Second):
-		t.Fatal("Wait should return promptly after the network becomes available")
-	}
-}
-
-func TestWaitReturnsOnContextCancel(t *testing.T) {
-	s := New()
-	s.Set(false)
-
-	ctx, cancel := context.WithCancel(context.Background())
-
-	result := make(chan error, 1)
-	go func() {
-		_, err := s.Wait(ctx)
-		result <- err
-	}()
-
-	cancel()
-
-	select {
-	case err := <-result:
-		assert.ErrorIs(t, err, context.Canceled)
-	case <-time.After(2 * time.Second):
-		t.Fatal("Wait should return promptly after context cancellation")
-	}
-}
-
-func TestWaitWakesAllWaiters(t *testing.T) {
-	s := New()
-	s.Set(false)
-
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-
-	const waiters = 10
-	var wg sync.WaitGroup
-	results := make(chan bool, waiters)
-	for i := 0; i < waiters; i++ {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			waited, err := s.Wait(ctx)
-			if err != nil {
-				results <- false
-				return
-			}
-			results <- waited
-		}()
-	}
-
-	time.Sleep(100 * time.Millisecond)
-	s.Set(true)
-	wg.Wait()
-
-	close(results)
-	count := 0
-	for waited := range results {
-		assert.True(t, waited, "every waiter should report that it waited")
-		count++
-	}
-	assert.Equal(t, waiters, count, "all waiters should have returned")
-}
-
-func TestNilStateReadsAreNoops(t *testing.T) {
-	var s *State
-
-	assert.True(t, s.IsOnline(), "nil State should report online")
-
-	waited, err := s.Wait(context.Background())
-	require.NoError(t, err)
-	assert.False(t, waited, "nil State's Wait should not block")
-}
-
-func TestConcurrentSetAndWait(t *testing.T) {
-	s := New()
-
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-
-	var wg sync.WaitGroup
-	for i := 0; i < 4; i++ {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			for j := 0; j < 100; j++ {
-				s.Set(j%2 == 0)
-				s.IsOnline()
-			}
-		}()
-	}
-	for i := 0; i < 4; i++ {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			for j := 0; j < 100; j++ {
-				if _, err := s.Wait(ctx); err != nil {
-					return
-				}
-			}
-		}()
-	}
-
-	wg.Wait()
-}

client/netsweep/netsweep.go

@@ -1,267 +0,0 @@
-// Package netsweep cuts network-bound activity when the OS switches networks:
-// a sweep closes the registered connections and aborts the in-flight dials, so
-// their owners redial immediately instead of waiting for the old sockets to
-// time out.
-//
-// A nil *Sweeper disables everything: all methods are nil-safe no-ops.
-package netsweep
-
-import (
-	"context"
-	"errors"
-	"net"
-	"sync"
-	"time"
-
-	"github.com/cenkalti/backoff/v4"
-	log "github.com/sirupsen/logrus"
-
-	"github.com/netbirdio/netbird/client/netstate"
-)
-
-// DefaultSweepDelay absorbs network flapping while the OS settles on a
-// default network before the stale registrations are cut.
-const DefaultSweepDelay = 500 * time.Millisecond
-
-const recentMarkWindow = 3 * time.Second
-
-// Config customizes a Sweeper. The zero value applies the defaults.
-type Config struct {
-	// SweepDelay overrides DefaultSweepDelay when positive.
-	SweepDelay time.Duration
-}
-
-// ErrSwept reports that a dial finished after a network change swept its
-// registration. The connection is already closed; the caller must treat it
-// as a failed dial and redial on the new network.
-var ErrSwept = errors.New("netsweep: connection swept by network change")
-
-// sweepID identifies one registration in a sweeper. Connections and dials
-// draw from the same counter, so an id is unique across both registries.
-type sweepID uint64
-
-type connEntry struct {
-	conn net.Conn
-	gen  uint64
-}
-
-// Dial tracks one dial from start to connection registration. It hands the
-// dialed connection to the sweeper atomically, so a sweep can never fall
-// between the dial finishing and the connection being registered.
-type Dial struct {
-	sweeper *Sweeper
-	ctx     context.Context
-	cancel  context.CancelFunc
-	id      sweepID
-	done    bool // set by a sweep, WrapConn or Release; guarded by sweeper.mu
-	gen     uint64
-}
-
-// Ctx returns the dial's context. A sweep cancels it, so a dial started on the
-// old network aborts instead of waiting out its handshake timeout.
-func (d *Dial) Ctx() context.Context {
-	return d.ctx
-}
-
-// Release ends the dial's registration and cancels its context. It is
-// idempotent and safe after WrapConn, so callers can defer it.
-func (d *Dial) Release() {
-	s := d.sweeper
-	if s == nil {
-		return
-	}
-
-	s.mu.Lock()
-	d.done = true
-	delete(s.dials, d.id)
-	s.mu.Unlock()
-
-	d.cancel()
-}
-
-// sweptConn deregisters itself from the sweeper when closed.
-type sweptConn struct {
-	net.Conn
-	sweeper *Sweeper
-	id      sweepID
-}
-
-func (c *sweptConn) Close() error {
-	c.sweeper.deregister(c.id)
-	return c.Conn.Close()
-}
-
-// Sweeper registers live connections and in-flight dials so the
-// network-change sweep can cut everything registered before the change.
-type Sweeper struct {
-	mu         sync.Mutex
-	conns      map[sweepID]connEntry
-	dials      map[sweepID]*Dial
-	nextID     sweepID
-	gen        uint64
-	timer      *time.Timer
-	sweepDelay time.Duration
-	lastMark   time.Time
-}
-
-// New creates an empty sweeper with the default configuration.
-func New() *Sweeper {
-	return NewWithConfig(Config{})
-}
-
-// NewWithConfig creates an empty sweeper customized by cfg.
-func NewWithConfig(cfg Config) *Sweeper {
-	delay := cfg.SweepDelay
-	if delay <= 0 {
-		delay = DefaultSweepDelay
-	}
-	return &Sweeper{
-		conns:      make(map[sweepID]connEntry),
-		dials:      make(map[sweepID]*Dial),
-		sweepDelay: delay,
-	}
-}
-
-// StartDial registers an in-flight dial. Dial with Ctx, hand the result to
-// WrapConn, and Release the dial when the attempt is over, typically deferred.
-func (s *Sweeper) StartDial(ctx context.Context) *Dial {
-	if s == nil {
-		return &Dial{ctx: ctx}
-	}
-
-	ctx, cancel := context.WithCancel(ctx)
-	d := &Dial{sweeper: s, ctx: ctx, cancel: cancel}
-
-	s.mu.Lock()
-	d.id = s.nextID
-	s.nextID++
-	d.gen = s.gen
-	s.dials[d.id] = d
-	s.mu.Unlock()
-
-	return d
-}
-
-// WrapConn hands conn over to the sweeper. If a sweep ran since StartDial,
-// the connection belongs to the old network: it is closed and ErrSwept is
-// returned. Otherwise conn is registered against the next sweep and returned
-// wrapped, deregistering itself on Close. Call it once, before Release.
-func (d *Dial) WrapConn(conn net.Conn) (net.Conn, error) {
-	s := d.sweeper
-	if s == nil {
-		return conn, nil
-	}
-
-	s.mu.Lock()
-	if d.done {
-		s.mu.Unlock()
-		if err := conn.Close(); err != nil {
-			log.Debugf("swept dial close error: %v", err)
-		}
-		return nil, ErrSwept
-	}
-	d.done = true
-	delete(s.dials, d.id)
-	id := s.nextID
-	s.nextID++
-	// The conn inherits the dial's generation: the socket was bound to the
-	// network that was default when the dial started, not when it finished.
-	s.conns[id] = connEntry{conn: conn, gen: d.gen}
-	s.mu.Unlock()
-
-	return &sweptConn{Conn: conn, sweeper: s, id: id}, nil
-}
-
-// MarkNetworkChange records that the OS switched networks: everything
-// registered so far becomes stale, and a sweep is (re)scheduled after the
-// configured delay to cut whatever is still stale by then. Owners that
-// redialed in the meantime hold fresh-generation registrations and survive,
-// so no cancellation is needed around the sweep.
-func (s *Sweeper) MarkNetworkChange() {
-	if s == nil {
-		return
-	}
-
-	s.mu.Lock()
-	s.gen++
-	cutoff := s.gen
-	s.lastMark = time.Now()
-	if s.timer != nil {
-		s.timer.Stop()
-	}
-	s.timer = time.AfterFunc(s.sweepDelay, func() {
-		n := s.sweep(cutoff)
-		log.Infof("network change sweep: closed %d stale connections", n)
-	})
-	s.mu.Unlock()
-}
-
-// QuickRetryBackoff wraps bo so that after each Reset the first retry comes
-// quickly when the disconnect followed a recent network change and the
-// network is online. Any other failure keeps bo's spread, so the clients of
-// a restarted server still scatter their reconnects. A nil sweeper returns
-// bo unchanged.
-func (s *Sweeper) QuickRetryBackoff(ctx context.Context, bo backoff.BackOff, netState *netstate.State) backoff.BackOff {
-	if s == nil {
-		return bo
-	}
-	return backoff.WithContext(newQuickRetryBackoff(bo, s, netState), ctx)
-}
-
-func (s *Sweeper) markedRecently() bool {
-	if s == nil {
-		return false
-	}
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	return !s.lastMark.IsZero() && time.Since(s.lastMark) < recentMarkWindow
-}
-
-// sweep closes the registered connections and aborts the in-flight dials
-// older than cutoff, and returns how many connections it closed. A dial
-// whose connection was not yet handed to WrapConn is marked, so the late
-// WrapConn closes it instead of registering it.
-func (s *Sweeper) sweep(cutoff uint64) int {
-	if s == nil {
-		return 0
-	}
-
-	s.mu.Lock()
-	var conns []net.Conn
-	for id, e := range s.conns {
-		if e.gen < cutoff {
-			delete(s.conns, id)
-			conns = append(conns, e.conn)
-		}
-	}
-	var dials []*Dial
-	for id, d := range s.dials {
-		if d.gen < cutoff {
-			d.done = true
-			delete(s.dials, id)
-			dials = append(dials, d)
-		}
-	}
-	s.mu.Unlock()
-
-	if len(dials) > 0 {
-		log.Debugf("aborting %d in-flight dials", len(dials))
-		for _, d := range dials {
-			d.cancel()
-		}
-	}
-
-	for _, conn := range conns {
-		log.Debugf("sweeping connection %s -> %s", conn.LocalAddr(), conn.RemoteAddr())
-		if err := conn.Close(); err != nil {
-			log.Debugf("swept connection close error: %v", err)
-		}
-	}
-	return len(conns)
-}
-
-func (s *Sweeper) deregister(id sweepID) {
-	s.mu.Lock()
-	delete(s.conns, id)
-	s.mu.Unlock()
-}

client/netsweep/netsweep_test.go

@@ -1,241 +0,0 @@
-package netsweep
-
-import (
-	"context"
-	"math"
-	"net"
-	"testing"
-	"time"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func TestSweepClosesRegisteredConns(t *testing.T) {
-	sweeper := New()
-
-	c1 := wrap(t, sweeper, connPair(t))
-	c2 := wrap(t, sweeper, connPair(t))
-
-	assert.Equal(t, 2, sweeper.sweepAll(), "both live connections should be closed")
-
-	// The wrappers must report closed now.
-	buf := make([]byte, 1)
-	_, err := c1.Read(buf)
-	assert.Error(t, err, "first connection should be unusable after the sweep")
-	_, err = c2.Read(buf)
-	assert.Error(t, err, "second connection should be unusable after the sweep")
-
-	assert.Equal(t, 0, sweeper.sweepAll(), "second sweep should find nothing")
-}
-
-func TestCloseDeregisters(t *testing.T) {
-	sweeper := New()
-
-	conn := wrap(t, sweeper, connPair(t))
-	require.NoError(t, conn.Close())
-
-	assert.Equal(t, 0, sweeper.sweepAll(), "closed connection must leave the registry")
-}
-
-func TestCloseIsIdempotent(t *testing.T) {
-	sweeper := New()
-
-	conn := wrap(t, sweeper, connPair(t))
-	require.NoError(t, conn.Close())
-	assert.Error(t, conn.Close(), "double close surfaces the underlying error but must not panic")
-}
-
-func TestSweepOnlyAffectsOlderConns(t *testing.T) {
-	sweeper := New()
-
-	_ = wrap(t, sweeper, connPair(t))
-	assert.Equal(t, 1, sweeper.sweepAll())
-
-	// A connection dialed after the sweep must survive until the next one.
-	_ = wrap(t, sweeper, connPair(t))
-	assert.Equal(t, 1, sweeper.sweepAll(), "post-sweep connection belongs to the next sweep")
-}
-
-func TestSweepAbortsInFlightDials(t *testing.T) {
-	sweeper := New()
-
-	dial := sweeper.StartDial(context.Background())
-	defer dial.Release()
-
-	sweeper.sweepAll()
-
-	assert.ErrorIs(t, dial.Ctx().Err(), context.Canceled, "sweep must cancel the in-flight dial context")
-}
-
-func TestReleasedDialIsNotAborted(t *testing.T) {
-	sweeper := New()
-
-	// Simulate a dial that finished before the sweep.
-	released := sweeper.StartDial(context.Background())
-	released.Release()
-
-	// A dial still in flight during the sweep.
-	pending := sweeper.StartDial(context.Background())
-	defer pending.Release()
-
-	sweeper.sweepAll()
-	assert.ErrorIs(t, pending.Ctx().Err(), context.Canceled, "pending dial must be aborted")
-}
-
-func TestSweepBetweenDialAndHandoffClosesConn(t *testing.T) {
-	sweeper := New()
-
-	dial := sweeper.StartDial(context.Background())
-	defer dial.Release()
-
-	// The dial succeeds on the old network, then the sweep lands before the
-	// connection is handed over.
-	conn := connPair(t)
-	assert.Equal(t, 0, sweeper.sweepAll(), "the connection is not registered yet")
-
-	wrapped, err := dial.WrapConn(conn)
-	require.ErrorIs(t, err, ErrSwept)
-	require.Nil(t, wrapped)
-
-	buf := make([]byte, 1)
-	_, err = conn.Read(buf)
-	assert.Error(t, err, "the old-network connection must be closed, not leaked")
-
-	assert.Equal(t, 0, sweeper.sweepAll(), "nothing may leak into the next sweep")
-}
-
-func TestMarkNetworkChangeSparesFreshConns(t *testing.T) {
-	sweeper := NewWithConfig(Config{SweepDelay: 10 * time.Millisecond})
-
-	stale := wrap(t, sweeper, connPair(t))
-	sweeper.MarkNetworkChange()
-	_ = wrap(t, sweeper, connPair(t))
-
-	_ = stale.SetReadDeadline(time.Now().Add(time.Second))
-	buf := make([]byte, 1)
-	_, err := stale.Read(buf)
-	require.ErrorIs(t, err, net.ErrClosed, "stale connection must be closed by the delayed sweep")
-
-	assert.Equal(t, 1, sweeper.sweepAll(), "the fresh connection must survive the stale sweep")
-}
-
-func TestMarkNetworkChangeAbortsStaleDials(t *testing.T) {
-	sweeper := NewWithConfig(Config{SweepDelay: 10 * time.Millisecond})
-
-	stale := sweeper.StartDial(context.Background())
-	defer stale.Release()
-	sweeper.MarkNetworkChange()
-	fresh := sweeper.StartDial(context.Background())
-	defer fresh.Release()
-
-	assert.Eventually(t, func() bool {
-		return stale.Ctx().Err() != nil
-	}, time.Second, 5*time.Millisecond, "stale dial must be aborted by the delayed sweep")
-	assert.NoError(t, fresh.Ctx().Err(), "post-mark dial must not be aborted")
-}
-
-func TestConnInheritsDialGeneration(t *testing.T) {
-	sweeper := NewWithConfig(Config{SweepDelay: 20 * time.Millisecond})
-
-	// The dial starts before the network change but completes after it: the
-	// socket is bound to the old network, so the sweep must still cut it.
-	dial := sweeper.StartDial(context.Background())
-	defer dial.Release()
-	sweeper.MarkNetworkChange()
-
-	wrapped, err := dial.WrapConn(connPair(t))
-	require.NoError(t, err)
-
-	_ = wrapped.SetReadDeadline(time.Now().Add(time.Second))
-	buf := make([]byte, 1)
-	_, err = wrapped.Read(buf)
-	require.ErrorIs(t, err, net.ErrClosed, "old-generation connection must be swept")
-}
-
-func TestRepeatedMarksCoalesce(t *testing.T) {
-	sweeper := NewWithConfig(Config{SweepDelay: 20 * time.Millisecond})
-
-	first := wrap(t, sweeper, connPair(t))
-	sweeper.MarkNetworkChange()
-	second := wrap(t, sweeper, connPair(t))
-	sweeper.MarkNetworkChange()
-	_ = wrap(t, sweeper, connPair(t))
-
-	buf := make([]byte, 1)
-	for _, conn := range []net.Conn{first, second} {
-		_ = conn.SetReadDeadline(time.Now().Add(time.Second))
-		_, err := conn.Read(buf)
-		require.ErrorIs(t, err, net.ErrClosed, "every pre-mark connection must be swept by the rescheduled sweep")
-	}
-	assert.Equal(t, 1, sweeper.sweepAll(), "only the newest-generation connection may remain")
-}
-
-func TestNilSweeperIsNoop(t *testing.T) {
-	var sweeper *Sweeper
-
-	conn := connPair(t)
-	dial := sweeper.StartDial(context.Background())
-	defer dial.Release()
-
-	wrapped, err := dial.WrapConn(conn)
-	require.NoError(t, err)
-	assert.Equal(t, conn, wrapped, "nil sweeper must return the conn unchanged")
-	assert.NoError(t, dial.Ctx().Err(), "nil sweeper must not cancel the dial context")
-	assert.Equal(t, 0, sweeper.sweepAll(), "nil sweeper closes nothing")
-}
-
-// wrap registers conn with the sweeper through a completed dial.
-func wrap(t *testing.T, sweeper *Sweeper, conn net.Conn) net.Conn {
-	t.Helper()
-
-	dial := sweeper.StartDial(context.Background())
-	defer dial.Release()
-
-	wrapped, err := dial.WrapConn(conn)
-	require.NoError(t, err)
-	return wrapped
-}
-
-// connPair dials a loopback TCP connection and keeps the accepted peer open
-// until the test ends: a peer that closed early would make the connection
-// unreadable on its own, so a read error after the sweep would prove nothing.
-func connPair(t *testing.T) net.Conn {
-	t.Helper()
-
-	l, err := net.Listen("tcp", "127.0.0.1:0")
-	require.NoError(t, err)
-	t.Cleanup(func() {
-		if err := l.Close(); err != nil {
-			t.Logf("listener close error: %v", err)
-		}
-	})
-
-	accepted := make(chan net.Conn, 1)
-	go func() {
-		conn, err := l.Accept()
-		if err != nil {
-			close(accepted)
-			return
-		}
-		accepted <- conn
-	}()
-
-	conn, err := net.Dial("tcp", l.Addr().String())
-	require.NoError(t, err)
-
-	peer, ok := <-accepted
-	require.True(t, ok, "listener must accept the dialed connection")
-	t.Cleanup(func() {
-		if err := peer.Close(); err != nil {
-			t.Logf("peer close error: %v", err)
-		}
-	})
-
-	return conn
-}
-
-// sweepAll cuts every registration regardless of generation.
-func (s *Sweeper) sweepAll() int {
-	return s.sweep(math.MaxUint64)
-}

client/netsweep/quick_retry.go

@@ -1,39 +0,0 @@
-package netsweep
-
-import (
-	"time"
-
-	"github.com/cenkalti/backoff/v4"
-
-	"github.com/netbirdio/netbird/client/netstate"
-)
-
-const quickRetryDelay = 200 * time.Millisecond
-
-type quickRetryBackoff struct {
-	backoff.BackOff
-	sweeper  *Sweeper
-	netState *netstate.State
-	used     bool
-}
-
-func newQuickRetryBackoff(bo backoff.BackOff, sweeper *Sweeper, netState *netstate.State) *quickRetryBackoff {
-	return &quickRetryBackoff{
-		BackOff:  bo,
-		sweeper:  sweeper,
-		netState: netState,
-	}
-}
-
-func (b *quickRetryBackoff) NextBackOff() time.Duration {
-	if !b.used && b.sweeper.markedRecently() && b.netState.IsOnline() {
-		b.used = true
-		return quickRetryDelay
-	}
-	return b.BackOff.NextBackOff()
-}
-
-func (b *quickRetryBackoff) Reset() {
-	b.used = false
-	b.BackOff.Reset()
-}

client/netsweep/quick_retry_test.go

@@ -1,58 +0,0 @@
-package netsweep
-
-import (
-	"context"
-	"testing"
-	"time"
-
-	"github.com/cenkalti/backoff/v4"
-	"github.com/stretchr/testify/assert"
-)
-
-func TestQuickRetryAfterRecentMark(t *testing.T) {
-	sweeper := New()
-	sweeper.MarkNetworkChange()
-
-	slow := backoff.NewConstantBackOff(5 * time.Second)
-	bo := sweeper.QuickRetryBackoff(context.Background(), slow, nil)
-
-	assert.Equal(t, quickRetryDelay, bo.NextBackOff(), "first retry after a mark must be quick")
-	assert.Equal(t, 5*time.Second, bo.NextBackOff(), "second retry must fall back to the wrapped backoff")
-
-	bo.Reset()
-	assert.Equal(t, quickRetryDelay, bo.NextBackOff(), "reset must re-arm the quick retry")
-}
-
-func TestQuickRetryWithoutMarkKeepsSpread(t *testing.T) {
-	sweeper := New()
-
-	slow := backoff.NewConstantBackOff(5 * time.Second)
-	bo := sweeper.QuickRetryBackoff(context.Background(), slow, nil)
-
-	assert.Equal(t, 5*time.Second, bo.NextBackOff(), "without a mark the wrapped backoff decides")
-
-	sweeper.mu.Lock()
-	sweeper.lastMark = time.Now().Add(-recentMarkWindow)
-	sweeper.mu.Unlock()
-	assert.Equal(t, 5*time.Second, bo.NextBackOff(), "a stale mark must not trigger the quick retry")
-}
-
-func TestQuickRetryNilSweeperPassthrough(t *testing.T) {
-	var sweeper *Sweeper
-
-	slow := backoff.NewConstantBackOff(5 * time.Second)
-	bo := sweeper.QuickRetryBackoff(context.Background(), slow, nil)
-
-	assert.Equal(t, backoff.BackOff(slow), bo, "nil sweeper must return the backoff unchanged")
-}
-
-func TestQuickRetryHonorsContext(t *testing.T) {
-	sweeper := New()
-	sweeper.MarkNetworkChange()
-
-	ctx, cancel := context.WithCancel(context.Background())
-	cancel()
-	bo := sweeper.QuickRetryBackoff(ctx, backoff.NewConstantBackOff(time.Millisecond), nil)
-
-	assert.Equal(t, backoff.Stop, bo.NextBackOff(), "cancelled context must stop the retry loop")
-}

shared/management/client/grpc.go

@@ -21,8 +21,6 @@ import (
 	"google.golang.org/grpc/connectivity"
 
 	nbgrpc "github.com/netbirdio/netbird/client/grpc"
-	"github.com/netbirdio/netbird/client/netstate"
-	"github.com/netbirdio/netbird/client/netsweep"
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/encryption"
 	"github.com/netbirdio/netbird/shared/management/domain"
@@ -64,13 +62,6 @@ type GrpcClient struct {
 	connStateCallbackLock sync.RWMutex
 	serverURL             string
 
-	// netState gates the stream retry loop on OS-reported network
-	// availability; nil (the default) disables gating.
-	netState *netstate.State
-
-	// sweeper cuts the transport connections on network change; nil disables it.
-	sweeper *netsweep.Sweeper
-
 	// syncStreamErr holds the last Sync stream error, or nil while the stream
 	// is established and healthy. GetServerKey succeeds even when the peer
 	// cannot sync (e.g. the server returns "settings not found"), so the
@@ -120,43 +111,16 @@ func MaxRecvMsgSize() int {
 	return size
 }
 
-// Option configures optional GrpcClient behavior.
-type Option func(*GrpcClient)
-
-// WithNetworkState injects the OS network availability state that gates the
-// stream retry loop; without it gating is disabled.
-func WithNetworkState(netState *netstate.State) Option {
-	return func(c *GrpcClient) { c.netState = netState }
-}
-
-// WithSweeper injects the network change sweeper.
-func WithSweeper(sweeper *netsweep.Sweeper) Option {
-	return func(c *GrpcClient) { c.sweeper = sweeper }
-}
-
 // NewClient creates a new client to Management service
-func NewClient(ctx context.Context, addr string, ourPrivateKey wgtypes.Key, tlsEnabled bool, opts ...Option) (*GrpcClient, error) {
-	// Options apply before dialing: the sweeper must wrap the first connection too.
-	c := &GrpcClient{
-		key:                   ourPrivateKey,
-		ctx:                   ctx,
-		connStateCallbackLock: sync.RWMutex{},
-		serverURL:             addr,
-	}
-	for _, opt := range opts {
-		opt(c)
-	}
+func NewClient(ctx context.Context, addr string, ourPrivateKey wgtypes.Key, tlsEnabled bool) (*GrpcClient, error) {
+	var conn *grpc.ClientConn
 
 	var extraOpts []grpc.DialOption
 	if maxSize := MaxRecvMsgSize(); maxSize > 0 {
 		extraOpts = append(extraOpts, grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(maxSize)))
 		log.Infof("management gRPC max receive message size set to %d bytes", maxSize)
 	}
-	if c.sweeper != nil {
-		extraOpts = append(extraOpts, nbgrpc.WithSweeper(c.sweeper))
-	}
 
-	var conn *grpc.ClientConn
 	operation := func() error {
 		var err error
 		conn, err = nbgrpc.CreateConnection(ctx, addr, tlsEnabled, wsproxy.ManagementComponent, extraOpts...)
@@ -172,9 +136,16 @@ func NewClient(ctx context.Context, addr string, ourPrivateKey wgtypes.Key, tlsE
 		return nil, err
 	}
 
-	c.conn = conn
-	c.realClient = proto.NewManagementServiceClient(conn)
-	return c, nil
+	realClient := proto.NewManagementServiceClient(conn)
+
+	return &GrpcClient{
+		key:                   ourPrivateKey,
+		realClient:            realClient,
+		ctx:                   ctx,
+		conn:                  conn,
+		connStateCallbackLock: sync.RWMutex{},
+		serverURL:             addr,
+	}, nil
 }
 
 // GetServerURL returns the management server URL
@@ -235,33 +206,16 @@ func (c *GrpcClient) withMgmtStream(
 	ctx context.Context,
 	handler func(ctx context.Context, serverPubKey wgtypes.Key, backOff backoff.BackOff) error,
 ) error {
-	backOff := c.sweeper.QuickRetryBackoff(ctx, defaultBackoff(ctx), c.netState)
+	backOff := defaultBackoff(ctx)
 	operation := func() error {
-		// suspend reconnect attempts while the OS reports no usable network.
-		// Wait only errors on a cancelled context, which means shutdown, so
-		// stop the loop without reporting a failure.
-		if waited, err := c.netState.Wait(ctx); err != nil {
-			log.Debugf("management connection context has been canceled while offline, this usually indicates shutdown")
-			return nil //nolint:nilerr // a cancelled context means shutdown, not a retryable failure
-		} else if waited {
-			backOff.Reset()
-		}
-
+		log.Debugf("management connection state %v", c.conn.GetState())
 		connState := c.conn.GetState()
-		log.Debugf("management connection state %v", connState)
+
 		if connState == connectivity.Shutdown {
 			return backoff.Permanent(fmt.Errorf("connection to management has been shut down"))
-		}
-		if !(connState == connectivity.Ready || connState == connectivity.Idle) {
-			// A dial may already be in flight (e.g. the other stream triggered
-			// it after a network change); wait for it to settle and proceed if
-			// the channel became usable, instead of burning a backoff round on
-			// a successful dial. A failed dial errors out as before.
+		} else if !(connState == connectivity.Ready || connState == connectivity.Idle) {
 			c.conn.WaitForStateChange(ctx, connState)
-			connState = c.conn.GetState()
-			if !(connState == connectivity.Ready || connState == connectivity.Idle) {
-				return fmt.Errorf("connection to management is not ready and in %s state", connState)
-			}
+			return fmt.Errorf("connection to management is not ready and in %s state", connState)
 		}
 
 		serverPubKey, err := c.getServerPublicKey()
@@ -273,7 +227,7 @@ func (c *GrpcClient) withMgmtStream(
 		return handler(ctx, *serverPubKey, backOff)
 	}
 
-	err := nbgrpc.Retry(ctx, operation, backOff, c.netState)
+	err := backoff.Retry(operation, backOff)
 	if err != nil {
 		log.Warnf("exiting the Management service connection retry loop due to the unrecoverable error: %s", err)
 	}

shared/relay/client/client.go

@@ -14,7 +14,6 @@ import (
 
 	log "github.com/sirupsen/logrus"
 
-	"github.com/netbirdio/netbird/client/netsweep"
 	auth "github.com/netbirdio/netbird/shared/relay/auth/hmac"
 	"github.com/netbirdio/netbird/shared/relay/client/dialer"
 	netErr "github.com/netbirdio/netbird/shared/relay/client/dialer/net"
@@ -185,10 +184,6 @@ type Client struct {
 	// datagram-sized transport is avoided on subsequent connects. Shared via
 	// the manager.
 	transportFallback *transportFallback
-
-	// sweeper cuts the relay connection on network change; the read loop
-	// reports the disconnect and the guard reconnects. Shared via the manager.
-	sweeper *netsweep.Sweeper
 	// datagramFallbackTriggered guards a single fallback per connection so a
 	// burst of oversized datagrams triggers one reconnect, not many.
 	datagramFallbackTriggered atomic.Bool
@@ -398,12 +393,6 @@ func (c *Client) Close() error {
 }
 
 func (c *Client) connect(ctx context.Context) (*RelayAddr, error) {
-	// A sweep cancels this context, so a dial started on the old network
-	// aborts instead of waiting out its handshake timeout.
-	dial := c.sweeper.StartDial(ctx)
-	defer dial.Release()
-	ctx = dial.Ctx()
-
 	mode := transportModeFromEnv()
 	dialers := c.getDialers(mode)
 
@@ -428,19 +417,12 @@ func (c *Client) connect(ctx context.Context) (*RelayAddr, error) {
 			return nil, fmt.Errorf("dial via FQDN: %w", err)
 		}
 	}
-	// Read the transport off the concrete connection: the sweeper's wrapper
-	// embeds net.Conn only, so it does not promote Protocol().
+	c.relayConn = conn
+	c.datagramFallbackTriggered.Store(false)
 	if tc, ok := conn.(transportConn); ok {
 		c.transport = tc.Protocol()
 	}
 
-	conn, err := dial.WrapConn(conn)
-	if err != nil {
-		return nil, fmt.Errorf("register connection: %w", err)
-	}
-	c.relayConn = conn
-	c.datagramFallbackTriggered.Store(false)
-
 	instanceURL, err := c.handShake(ctx)
 	if err != nil {
 		cErr := conn.Close()

shared/relay/client/guard.go

@@ -7,22 +7,9 @@ import (
 
 	"github.com/cenkalti/backoff/v4"
 	log "github.com/sirupsen/logrus"
-
-	"github.com/netbirdio/netbird/client/netstate"
 )
 
-const (
-	defaultMaxBackoffInterval = 60 * time.Second
-
-	// quickReconnectBudget bounds how long a quick reconnect waits for the
-	// network before handing the retry over to the ticker.
-	quickReconnectBudget = 1500 * time.Millisecond
-
-	// verdictSettleWindow is how long an online verdict must hold before it
-	// is trusted: the disconnect often precedes the OS offline flag by a few
-	// milliseconds.
-	verdictSettleWindow = 200 * time.Millisecond
-)
+const defaultMaxBackoffInterval = 60 * time.Second
 
 // Guard manage the reconnection tries to the Relay server in case of disconnection event.
 type Guard struct {
@@ -35,19 +22,14 @@ type Guard struct {
 	// attempts.
 	maxBackoffInterval time.Duration
 
-	// netState gates reconnect attempts on OS-reported network availability;
-	// nil disables gating.
-	netState *netstate.State
-
 	// lastErr is the error from the most recent failed reconnect attempt,
 	// surfaced as the home relay status while disconnected.
 	lastErr atomic.Pointer[error]
 }
 
 // NewGuard creates a new guard for the relay client. A non-positive
-// maxBackoffInterval falls back to defaultMaxBackoffInterval. A nil netState
-// disables network availability gating.
-func NewGuard(sp *ServerPicker, maxBackoffInterval time.Duration, netState *netstate.State) *Guard {
+// maxBackoffInterval falls back to defaultMaxBackoffInterval.
+func NewGuard(sp *ServerPicker, maxBackoffInterval time.Duration) *Guard {
 	if maxBackoffInterval <= 0 {
 		maxBackoffInterval = defaultMaxBackoffInterval
 	}
@@ -56,7 +38,6 @@ func NewGuard(sp *ServerPicker, maxBackoffInterval time.Duration, netState *nets
 		OnReconnected:      make(chan struct{}, 1),
 		serverPicker:       sp,
 		maxBackoffInterval: maxBackoffInterval,
-		netState:           netState,
 	}
 	return g
 }
@@ -89,21 +70,11 @@ func (g *Guard) StartReconnectTrys(ctx context.Context, relayClient *Client) {
 
 	// start a ticker to pick a new server
 	ticker := g.exponentTicker(ctx)
-	defer func() {
-		ticker.Stop()
-	}()
+	defer ticker.Stop()
 
 	for {
 		select {
 		case <-ticker.C:
-			// suspend reconnect attempts while the OS reports no usable network
-			if waited, err := g.netState.Wait(ctx); err != nil {
-				return
-			} else if waited {
-				ticker.Stop()
-				ticker = g.exponentTicker(ctx)
-				continue
-			}
 			if err := g.retry(ctx); err != nil {
 				log.Errorf("failed to pick new Relay server: %s", err)
 				g.setLastError(err)
@@ -129,12 +100,7 @@ func (g *Guard) tryToQuickReconnect(parentCtx context.Context, rc *Client) bool
 		return false
 	}
 
-	if ok := g.waitForNetwork(parentCtx); !ok {
-		return false
-	}
-
-	// Still offline after the budget: leave the retry to the ticker.
-	if !g.netState.IsOnline() {
+	if cancelled := waiteBeforeRetry(parentCtx); !cancelled {
 		return false
 	}
 
@@ -200,40 +166,14 @@ func (g *Guard) exponentTicker(ctx context.Context) *backoff.Ticker {
 	return backoff.NewTicker(bo)
 }
 
-// waitForNetwork waits out the settle window while online, or waits for the
-// network to return while offline, within the budget. Returns false when ctx
-// is cancelled. Without an injected netState it degrades to a fixed
-// budget-long sleep, the pre-netstate behavior.
-func (g *Guard) waitForNetwork(ctx context.Context) bool {
-	budget := time.NewTimer(quickReconnectBudget)
-	defer budget.Stop()
+func waiteBeforeRetry(ctx context.Context) bool {
+	timer := time.NewTimer(1500 * time.Millisecond)
+	defer timer.Stop()
 
-	settleWindow := verdictSettleWindow
-	if g.netState == nil {
-		settleWindow = quickReconnectBudget
-	}
-	settle := time.NewTimer(settleWindow)
-	defer settle.Stop()
-
-	for {
-		// Channel first, flag second: a flip in between still fires the channel.
-		changedCh := g.netState.Changed()
-		if g.netState.IsOnline() {
-			select {
-			case <-settle.C:
-				return true
-			case <-changedCh:
-				continue
-			case <-ctx.Done():
-				return false
-			}
-		}
-		select {
-		case <-budget.C:
-			return true
-		case <-changedCh:
-		case <-ctx.Done():
-			return false
-		}
+	select {
+	case <-timer.C:
+		return true
+	case <-ctx.Done():
+		return false
 	}
 }

shared/relay/client/manager.go

@@ -12,8 +12,6 @@ import (
 
 	log "github.com/sirupsen/logrus"
 
-	"github.com/netbirdio/netbird/client/netstate"
-	"github.com/netbirdio/netbird/client/netsweep"
 	relayAuth "github.com/netbirdio/netbird/shared/relay/auth/hmac"
 )
 
@@ -67,17 +65,6 @@ func WithMaxBackoffInterval(d time.Duration) ManagerOption {
 	return func(m *Manager) { m.maxBackoffInterval = d }
 }
 
-// WithNetworkState injects the OS network availability state that gates the
-// reconnect guard; without it reconnect attempts are not gated.
-func WithNetworkState(netState *netstate.State) ManagerOption {
-	return func(m *Manager) { m.netState = netState }
-}
-
-// WithSweeper injects the network change sweeper.
-func WithSweeper(sweeper *netsweep.Sweeper) ManagerOption {
-	return func(m *Manager) { m.sweeper = sweeper }
-}
-
 // Manager is a manager for the relay client instances. It establishes one persistent connection to the given relay URL
 // and automatically reconnect to them in case disconnection.
 // The manager also manage temporary relay connection. If a client wants to communicate with a client on a
@@ -105,8 +92,6 @@ type Manager struct {
 
 	mtu                uint16
 	maxBackoffInterval time.Duration
-	netState           *netstate.State
-	sweeper            *netsweep.Sweeper
 
 	cleanupInterval      time.Duration
 	keepUnusedServerTime time.Duration
@@ -143,9 +128,8 @@ func NewManager(ctx context.Context, serverURLs []string, peerID string, mtu uin
 	for _, opt := range opts {
 		opt(m)
 	}
-	m.serverPicker.Sweeper = m.sweeper
 	m.serverPicker.ServerURLs.Store(serverURLs)
-	m.reconnectGuard = NewGuard(m.serverPicker, m.maxBackoffInterval, m.netState)
+	m.reconnectGuard = NewGuard(m.serverPicker, m.maxBackoffInterval)
 	return m
 }
 
@@ -370,7 +354,6 @@ func (m *Manager) openConnVia(ctx context.Context, serverAddress, peerKey string
 
 	relayClient := NewClientWithServerIP(serverAddress, serverIP, m.tokenStore, m.peerID, m.mtu)
 	relayClient.SetTransportFallback(m.transportFallback)
-	relayClient.sweeper = m.sweeper
 	err := relayClient.Connect(m.ctx)
 	if err != nil {
 		rt.Lock()

shared/relay/client/picker.go

@@ -9,7 +9,6 @@ import (
 
 	log "github.com/sirupsen/logrus"
 
-	"github.com/netbirdio/netbird/client/netsweep"
 	auth "github.com/netbirdio/netbird/shared/relay/auth/hmac"
 )
 
@@ -31,7 +30,6 @@ type ServerPicker struct {
 	MTU               uint16
 	ConnectionTimeout time.Duration
 	TransportFallback *transportFallback
-	Sweeper           *netsweep.Sweeper
 }
 
 func (sp *ServerPicker) PickServer(parentCtx context.Context) (*Client, error) {
@@ -75,7 +73,6 @@ func (sp *ServerPicker) startConnection(ctx context.Context, resultChan chan con
 	log.Infof("try to connecting to relay server: %s", url)
 	relayClient := NewClient(url, sp.TokenStore, sp.PeerID, sp.MTU)
 	relayClient.SetTransportFallback(sp.TransportFallback)
-	relayClient.sweeper = sp.Sweeper
 	err := relayClient.Connect(ctx)
 	resultChan <- connResult{
 		RelayClient: relayClient,

shared/signal/client/grpc.go

@@ -19,8 +19,6 @@ import (
 	"google.golang.org/grpc/status"
 
 	nbgrpc "github.com/netbirdio/netbird/client/grpc"
-	"github.com/netbirdio/netbird/client/netstate"
-	"github.com/netbirdio/netbird/client/netsweep"
 	"github.com/netbirdio/netbird/encryption"
 	"github.com/netbirdio/netbird/shared/management/client"
 	"github.com/netbirdio/netbird/shared/signal/proto"
@@ -67,13 +65,6 @@ type GrpcClient struct {
 	connStateCallback     ConnStateNotifier
 	connStateCallbackLock sync.RWMutex
 
-	// netState gates the Receive retry loop on OS-reported network
-	// availability; nil (the default) disables gating.
-	netState *netstate.State
-
-	// sweeper cuts the transport connections on network change; nil disables it.
-	sweeper *netsweep.Sweeper
-
 	onReconnectedListenerFn func()
 
 	decryptionWorker       *Worker
@@ -97,43 +88,13 @@ type GrpcClient struct {
 	watchdogWg            sync.WaitGroup
 }
 
-// Option configures optional GrpcClient behavior.
-type Option func(*GrpcClient)
-
-// WithNetworkState injects the OS network availability state that gates the
-// Receive retry loop; without it gating is disabled.
-func WithNetworkState(netState *netstate.State) Option {
-	return func(c *GrpcClient) { c.netState = netState }
-}
-
-// WithSweeper injects the network change sweeper.
-func WithSweeper(sweeper *netsweep.Sweeper) Option {
-	return func(c *GrpcClient) { c.sweeper = sweeper }
-}
-
 // NewClient creates a new Signal client
-func NewClient(ctx context.Context, addr string, key wgtypes.Key, tlsEnabled bool, opts ...Option) (*GrpcClient, error) {
-	// Options apply before dialing: the sweeper must wrap the first connection too.
-	c := &GrpcClient{
-		ctx:                   ctx,
-		key:                   key,
-		mux:                   sync.Mutex{},
-		status:                StreamDisconnected,
-		connStateCallbackLock: sync.RWMutex{},
-	}
-	for _, opt := range opts {
-		opt(c)
-	}
-
-	var extraOpts []grpc.DialOption
-	if c.sweeper != nil {
-		extraOpts = append(extraOpts, nbgrpc.WithSweeper(c.sweeper))
-	}
-
+func NewClient(ctx context.Context, addr string, key wgtypes.Key, tlsEnabled bool) (*GrpcClient, error) {
 	var conn *grpc.ClientConn
+
 	operation := func() error {
 		var err error
-		conn, err = nbgrpc.CreateConnection(ctx, addr, tlsEnabled, wsproxy.SignalComponent, extraOpts...)
+		conn, err = nbgrpc.CreateConnection(ctx, addr, tlsEnabled, wsproxy.SignalComponent)
 		if err != nil {
 			return fmt.Errorf("create connection: %w", err)
 		}
@@ -148,9 +109,15 @@ func NewClient(ctx context.Context, addr string, key wgtypes.Key, tlsEnabled boo
 
 	log.Debugf("connected to Signal Service: %v", conn.Target())
 
-	c.signalConn = conn
-	c.realClient = proto.NewSignalExchangeClient(conn)
-	return c, nil
+	return &GrpcClient{
+		realClient:            proto.NewSignalExchangeClient(conn),
+		ctx:                   ctx,
+		signalConn:            conn,
+		key:                   key,
+		mux:                   sync.Mutex{},
+		status:                StreamDisconnected,
+		connStateCallbackLock: sync.RWMutex{},
+	}, nil
 }
 
 func (c *GrpcClient) StreamConnected() bool {
@@ -198,36 +165,19 @@ func defaultBackoff(ctx context.Context) backoff.BackOff {
 // The connection retry logic will try to reconnect for 30 min and if wasn't successful will propagate the error to the function caller.
 func (c *GrpcClient) Receive(ctx context.Context, msgHandler func(msg *proto.Message) error) error {
 
-	backOff := c.sweeper.QuickRetryBackoff(ctx, defaultBackoff(ctx), c.netState)
+	var backOff = defaultBackoff(ctx)
 
 	operation := func() error {
-		// suspend reconnect attempts while the OS reports no usable network.
-		// Wait only errors on a cancelled context, which means shutdown, so
-		// stop the loop without reporting a failure.
-		if waited, err := c.netState.Wait(ctx); err != nil {
-			log.Debugf("signal connection context has been canceled while offline, this usually indicates shutdown")
-			return nil
-		} else if waited {
-			backOff.Reset()
-		}
 
 		c.notifyStreamDisconnected()
 
+		log.Debugf("signal connection state %v", c.signalConn.GetState())
 		connState := c.signalConn.GetState()
-		log.Debugf("signal connection state %v", connState)
 		if connState == connectivity.Shutdown {
 			return backoff.Permanent(fmt.Errorf("connection to signal has been shut down"))
-		}
-		if !(connState == connectivity.Ready || connState == connectivity.Idle) {
-			// A dial may already be in flight (e.g. triggered by another RPC
-			// after a network change); wait for it to settle and proceed if
-			// the channel became usable, instead of burning a backoff round on
-			// a successful dial. A failed dial errors out as before.
+		} else if !(connState == connectivity.Ready || connState == connectivity.Idle) {
 			c.signalConn.WaitForStateChange(ctx, connState)
-			connState = c.signalConn.GetState()
-			if !(connState == connectivity.Ready || connState == connectivity.Idle) {
-				return fmt.Errorf("connection to signal is not ready and in %s state", connState)
-			}
+			return fmt.Errorf("connection to signal is not ready and in %s state", connState)
 		}
 
 		// connect to Signal stream identifying ourselves with a public WireGuard key
@@ -281,7 +231,7 @@ func (c *GrpcClient) Receive(ctx context.Context, msgHandler func(msg *proto.Mes
 		return nil
 	}
 
-	err := nbgrpc.Retry(ctx, operation, backOff, c.netState)
+	err := backoff.Retry(operation, backOff)
 	if err != nil {
 		log.Errorf("exiting the Signal service connection retry loop due to the unrecoverable error: %v", err)
 		return err