Export RenewFD function for Android

client/android/client.go

@@ -4,6 +4,7 @@ package android
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"slices"
 	"sync"
@@ -17,9 +18,9 @@ import (
 	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/client/internal/profilemanager"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
+	"github.com/netbirdio/netbird/client/net"
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/formatter"
-	"github.com/netbirdio/netbird/client/net"
 )
 
 // ConnectionListener export internal Listener for mobile
@@ -156,6 +157,19 @@ func (c *Client) Stop() {
 	c.ctxCancel()
 }
 
+func (c *Client) RenewTun(fd int) error {
+	if c.connectClient == nil {
+		return fmt.Errorf("engine not running")
+	}
+
+	e := c.connectClient.Engine()
+	if e == nil {
+		return fmt.Errorf("engine not initialized")
+	}
+
+	return e.RenewTun(fd)
+}
+
 // SetTraceLogLevel configure the logger to trace level
 func (c *Client) SetTraceLogLevel() {
 	log.SetLevel(log.TraceLevel)

client/iface/device/device_android.go

@@ -3,6 +3,7 @@
 package device
 
 import (
+	"fmt"
 	"strings"
 
 	log "github.com/sirupsen/logrus"
@@ -19,11 +20,12 @@ import (
 
 // WGTunDevice ignore the WGTunDevice interface on Android because the creation of the tun device is different on this platform
 type WGTunDevice struct {
-	address    wgaddr.Address
+	address wgaddr.Address
-	port       int
+	port    int
-	key        string
+	key     string
-	mtu        uint16
+	mtu     uint16
-	iceBind    *bind.ICEBind
+	iceBind *bind.ICEBind
+	// todo: review if we can eliminate the TunAdapter
 	tunAdapter TunAdapter
 	disableDNS bool
 
@@ -104,6 +106,13 @@ func (t *WGTunDevice) Up() (*udpmux.UniversalUDPMuxDefault, error) {
 	return udpMux, nil
 }
 
+func (t *WGTunDevice) RenewTun(fd int) error {
+	if t.device == nil {
+		return fmt.Errorf("device not initialized")
+	}
+	return fmt.Errorf("not implemented yet")
+}
+
 func (t *WGTunDevice) UpdateAddr(addr wgaddr.Address) error {
 	// todo implement
 	return nil

client/iface/device_android.go

@@ -21,4 +21,5 @@ type WGTunDevice interface {
 	FilteredDevice() *device.FilteredDevice
 	Device() *wgdevice.Device
 	GetNet() *netstack.Net
+	RenewTun(fd int) error
 }

client/iface/iface_create_android.go

@@ -6,6 +6,7 @@ import (
 
 // CreateOnAndroid creates a new Wireguard interface, sets a given IP and brings it up.
 // Will reuse an existing one.
+// todo: review does this function relly necessary ir can we merge it with iOS
 func (w *WGIface) CreateOnAndroid(routes []string, dns string, searchDomains []string) error {
 	w.mu.Lock()
 	defer w.mu.Unlock()
@@ -22,3 +23,7 @@ func (w *WGIface) CreateOnAndroid(routes []string, dns string, searchDomains []s
 func (w *WGIface) Create() error {
 	return fmt.Errorf("this function has not implemented on this platform")
 }
+
+func (w *WGIface) RenewTun(fd int) error {
+	return w.tun.RenewTun(fd)
+}

client/internal/engine.go

@@ -446,8 +446,6 @@ func (e *Engine) Start(netbirdConfig *mgmProto.NetbirdConfig, mgmtURL *url.URL)
 		return fmt.Errorf("up wg interface: %w", err)
 	}
 
-
-
 	// if inbound conns are blocked there is no need to create the ACL manager
 	if e.firewall != nil && !e.config.BlockInbound {
 		e.acl = acl.NewDefaultManager(e.firewall)
@@ -1828,6 +1826,15 @@ func (e *Engine) GetWgAddr() netip.Addr {
 	return e.wgInterface.Address().IP
 }
 
+func (e *Engine) RenewTun(fd int) error {
+	// todo review the mutex usage here. We must to be sure we do not modify the e.wgInterface when run this function
+	if e.wgInterface == nil {
+		return fmt.Errorf("wireguard interface not initialized")
+	}
+
+	return e.wgInterface.RenewTun(fd)
+}
+
 // updateDNSForwarder start or stop the DNS forwarder based on the domains and the feature flag
 func (e *Engine) updateDNSForwarder(
 	enabled bool,

client/internal/iface_common.go

@@ -20,6 +20,7 @@ import (
 type wgIfaceBase interface {
 	Create() error
 	CreateOnAndroid(routeRange []string, ip string, domains []string) error
+	RenewTun(fd int) error
 	IsUserspaceBind() bool
 	Name() string
 	Address() wgaddr.Address