Revert "Merge branch 'main' into feature/remote-debug"

This reverts commit 6d6333058c, reversing
changes made to 446aded1f7.

client/iface/iface.go

@@ -16,9 +16,9 @@ import (
 	wgdevice "golang.zx2c4.com/wireguard/device"
 
 	"github.com/netbirdio/netbird/client/errors"
+	"github.com/netbirdio/netbird/client/iface/bind"
 	"github.com/netbirdio/netbird/client/iface/configurer"
 	"github.com/netbirdio/netbird/client/iface/device"
-	"github.com/netbirdio/netbird/client/iface/udpmux"
 	"github.com/netbirdio/netbird/client/iface/wgaddr"
 	"github.com/netbirdio/netbird/client/iface/wgproxy"
 	"github.com/netbirdio/netbird/monotime"
@@ -26,8 +26,6 @@ import (
 
 const (
 	DefaultMTU         = 1280
-	MinMTU             = 576
-	MaxMTU             = 8192
 	DefaultWgPort      = 51820
 	WgInterfaceDefault = configurer.WgInterfaceDefault
 )
@@ -37,17 +35,6 @@ var (
 	ErrIfaceNotFound = fmt.Errorf("wireguard interface not found")
 )
 
-// ValidateMTU validates that MTU is within acceptable range
-func ValidateMTU(mtu uint16) error {
-	if mtu < MinMTU {
-		return fmt.Errorf("MTU %d below minimum (%d bytes)", mtu, MinMTU)
-	}
-	if mtu > MaxMTU {
-		return fmt.Errorf("MTU %d exceeds maximum supported size (%d bytes)", mtu, MaxMTU)
-	}
-	return nil
-}
-
 type wgProxyFactory interface {
 	GetProxy() wgproxy.Proxy
 	Free() error
@@ -58,10 +45,10 @@ type WGIFaceOpts struct {
 	Address      string
 	WGPort       int
 	WGPrivKey    string
-	MTU          uint16
+	MTU          int
 	MobileArgs   *device.MobileIFaceArguments
 	TransportNet transport.Net
-	FilterFn     udpmux.FilterFn
+	FilterFn     bind.FilterFn
 	DisableDNS   bool
 }
 
@@ -95,10 +82,6 @@ func (w *WGIface) Address() wgaddr.Address {
 	return w.tun.WgAddress()
 }
 
-func (w *WGIface) MTU() uint16 {
-	return w.tun.MTU()
-}
-
 // ToInterface returns the net.Interface for the Wireguard interface
 func (r *WGIface) ToInterface() *net.Interface {
 	name := r.tun.DeviceName()
@@ -114,7 +97,7 @@ func (r *WGIface) ToInterface() *net.Interface {
 
 // Up configures a Wireguard interface
 // The interface must exist before calling this method (e.g. call interface.Create() before)
-func (w *WGIface) Up() (*udpmux.UniversalUDPMuxDefault, error) {
+func (w *WGIface) Up() (*bind.UniversalUDPMuxDefault, error) {
 	w.mu.Lock()
 	defer w.mu.Unlock()