libnetwork/osl: unify stubs for IfaceOption

Use the same signature for all platforms, but stub the nwIface type.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

libnetwork/osl/interface_freebsd.go

@@ -1,4 +0,0 @@
-package osl
-
-// IfaceOption is a function option type to set interface options
-type IfaceOption func()

libnetwork/osl/interface_linux.go

@@ -14,9 +14,6 @@ import (
 	"github.com/vishvananda/netns"
 )
 
-// IfaceOption is a function option type to set interface options
-type IfaceOption func(i *nwIface)
-
 type nwIface struct {
 	srcName     string
 	dstName     string

libnetwork/osl/interface_unsupported.go

@@ -0,0 +1,6 @@
+//go:build !linux
+// +build !linux
+
+package osl
+
+type nwIface struct{}

libnetwork/osl/interface_windows.go

@@ -1,4 +0,0 @@
-package osl
-
-// IfaceOption is a function option type to set interface options
-type IfaceOption func()

libnetwork/osl/sandbox.go

@@ -17,6 +17,9 @@ const (
 	SandboxTypeLoadBalancer = iota
 )
 
+// IfaceOption is a function option type to set interface options.
+type IfaceOption func(i *nwIface)
+
 // Sandbox represents a network sandbox, identified by a specific key.  It
 // holds a list of Interfaces, routes etc, and more can be added dynamically.
 type Sandbox interface {