}

// Interfaces returns a list of the system's network interfaces.
func Interfaces() ([]Interface, error) {
	ift, err := interfaceTable(0)
	if err != nil {
		return nil, &OpError{Op: "route", Net: "ip+net", Source: nil, Addr: nil, Err: err}
	}
	if len(ift) != 0 {
		zoneCache.update(ift, false)
	}
	return ift, nil
}

// InterfaceAddrs returns a list of the system's unicast interface
// addresses.
//

	checkNetsh(t)

	toString := func(name string, isup bool) string {
		if isup {
			return name + ":up"
		}
		return name + ":down"
	}

	ift, err := Interfaces()
	if err != nil {
		t.Fatal(err)
	}
	have := make([]string, 0)
	for _, ifi := range ift {
		have = append(have, toString(ifi.Name, ifi.Flags&FlagUp != 0))
	}
	slices.Sort(have)

	ifaces := make(map[string]bool)

}

// LoopbackInterface returns an available logical network interface
// for loopback test.
func LoopbackInterface() (*net.Interface, error) {
	ift, err := net.Interfaces()
	if err != nil {
		return nil, errNoAvailableInterface
	}
	for _, ifi := range ift {
		if ifi.Flags&net.FlagLoopback != 0 && ifi.Flags&net.FlagUp != 0 {
			return &ifi, nil
		}
	}
	return nil, errNoAvailableInterface
}

					panic("reflect.StructOf: illegal embedded field type " + stringFor(ft))
				}
			}

			switch Kind(f.Typ.Kind()) {
			case Interface:
				ift := (*interfaceType)(unsafe.Pointer(ft))
				for _, m := range ift.Methods {
					if pkgPath(ift.nameOff(m.Name)) != "" {
						// TODO(sbinet).  Issue 15924.
						panic("reflect: embedded interface with unexported method(s) not implemented")
					}

		$2 ~ /^SOCK_|SK_DIAG_|SKNLGRP_$/ ||
		$2 ~ /^FIORDCHK$/ ||
		$2 ~ /^SIOC/ ||
		$2 ~ /^TIOC/ ||
		$2 ~ /^TCGET/ ||
		$2 ~ /^TCSET/ ||
		$2 ~ /^TC(FLSH|SBRKP?|XONC)$/ ||
		$2 !~ "RTF_BITS" &&
		$2 ~ /^(IFF|IFT|NET_RT|RTM(GRP)?|RTF|RTV|RTA|RTAX)_/ ||
		$2 ~ /^BIOC/ ||
		$2 ~ /^DIOC/ ||
		$2 ~ /^RUSAGE_(SELF|CHILDREN|THREAD)/ ||