fix(wireguard): fix detection of kernelspace wireguard

internal/wireguard/netlinker.go

@@ -9,7 +9,7 @@ type NetLinker interface {
 	Router
 	Ruler
 	Linker
-	IsWireguardSupported() (ok bool, err error)
+	IsWireguardSupported() bool
 }
 
 type Router interface {

internal/wireguard/netlinker_mock_test.go

@@ -49,12 +49,11 @@ func (mr *MockNetLinkerMockRecorder) AddrReplace(arg0, arg1 interface{}) *gomock
 }
 
 // IsWireguardSupported mocks base method.
-func (m *MockNetLinker) IsWireguardSupported() (bool, error) {
+func (m *MockNetLinker) IsWireguardSupported() bool {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "IsWireguardSupported")
 	ret0, _ := ret[0].(bool)
-	ret1, _ := ret[1].(error)
-	return ret0, ret1
+	return ret0
 }
 
 // IsWireguardSupported indicates an expected call of IsWireguardSupported.

internal/wireguard/run.go

@@ -16,7 +16,6 @@ import (
 )
 
 var (
-	ErrDetectKernel      = errors.New("cannot detect Kernel support")
 	ErrCreateTun         = errors.New("cannot create TUN device")
 	ErrAddLink           = errors.New("cannot add Wireguard link")
 	ErrFindLink          = errors.New("cannot find link")
@@ -35,11 +34,7 @@ var (
 
 // See https://git.zx2c4.com/wireguard-go/tree/main.go
 func (w *Wireguard) Run(ctx context.Context, waitError chan<- error, ready chan<- struct{}) {
-	kernelSupported, err := w.netlink.IsWireguardSupported()
-	if err != nil {
-		waitError <- fmt.Errorf("%w: %s", ErrDetectKernel, err)
-		return
-	}
+	kernelSupported := w.netlink.IsWireguardSupported()
 
 	setupFunction := setupUserSpace
 	switch w.settings.Implementation {