sing-box/route/interface_finder.go

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2022-09-14 12:46:02 +08:00
package route
import (
"net"
"github.com/sagernet/sing/common/control"
)
var _ control.InterfaceFinder = (*myInterfaceFinder)(nil)
type myInterfaceFinder struct {
ifs []net.Interface
}
func (f *myInterfaceFinder) update() error {
ifs, err := net.Interfaces()
if err != nil {
return err
}
f.ifs = ifs
return nil
}
func (f *myInterfaceFinder) InterfaceIndexByName(name string) (interfaceIndex int, err error) {
for _, netInterface := range f.ifs {
if netInterface.Name == name {
return netInterface.Index, nil
}
}
netInterface, err := net.InterfaceByName(name)
if err != nil {
return
}
f.update()
return netInterface.Index, nil
}
func (f *myInterfaceFinder) InterfaceNameByIndex(index int) (interfaceName string, err error) {
for _, netInterface := range f.ifs {
if netInterface.Index == index {
return netInterface.Name, nil
}
}
netInterface, err := net.InterfaceByIndex(index)
if err != nil {
return
}
f.update()
return netInterface.Name, nil
}