package dialer import ( "net" "net/netip" "strings" "github.com/Dreamacro/clash/component/iface" ) func LookupLocalAddrFromIfaceName(ifaceName string, network string, destination netip.Addr, port int) (net.Addr, error) { ifaceObj, err := iface.ResolveInterface(ifaceName) if err != nil { return nil, err } var addr *netip.Prefix switch network { case "udp4", "tcp4": addr, err = ifaceObj.PickIPv4Addr(destination) case "tcp6", "udp6": addr, err = ifaceObj.PickIPv6Addr(destination) default: if destination.IsValid() { if destination.Is4() { addr, err = ifaceObj.PickIPv4Addr(destination) } else { addr, err = ifaceObj.PickIPv6Addr(destination) } } else { addr, err = ifaceObj.PickIPv4Addr(destination) } } if err != nil { return nil, err } if strings.HasPrefix(network, "tcp") { return &net.TCPAddr{ IP: addr.Addr().AsSlice(), Port: port, }, nil } else if strings.HasPrefix(network, "udp") { return &net.UDPAddr{ IP: addr.Addr().AsSlice(), Port: port, }, nil } return nil, iface.ErrAddrNotFound }