//
// Use viper to resolve the value of the environment variable.
var (
	HostIPv4LoopbackCidr = env.Register("ISTIO_OUTBOUND_IPV4_LOOPBACK_CIDR", "127.0.0.1/32",
		`IPv4 CIDR range used to identify outbound traffic on loopback interface intended for application container`)

	OwnerGroupsInclude = env.Register("ISTIO_OUTBOUND_OWNER_GROUPS", "*",
		`Comma separated list of groups whose outgoing traffic is to be redirected to Envoy.

//
// - isUnspecified: returns true if the IP address is the unspecified address.
// Either the IPv4 address "0.0.0.0" or the IPv6 address "::".
//
// - isLoopback: returns true if the IP address is the loopback address.
// Either an IPv4 address with a value of 127.x.x.x or an IPv6 address with a value of ::1.
//
// - isLinkLocalMulticast: returns true if the IP address is a link-local multicast address.

				if h, _, err := net.SplitHostPort(address); err == nil {
					address = h
				}
				// Create socket on specific vrf device.
				// To catch all kinds of special cases this filters specifically for loopback networks.
				if ip := net.ParseIP(address); ip != nil && !ip.IsLoopback() {
					_ = syscall.SetsockoptString(fd, syscall.SOL_SOCKET, syscall.SO_BINDTODEVICE, opts.Interface)
				}
			}
		})
		return nil
	}

	}

	device := fields[1]
	mtustr := fields[3]

	mtu, _, ok := dtoi(mtustr)
	if !ok {
		return nil, errors.New("invalid status file of interface: " + ifcstat)
	}
	ifc.MTU = mtu

	// Not a loopback device ("/dev/null") or packet interface (e.g. "pkt2")
	if stringslite.HasPrefix(device, netdir+"/") {
		deviceaddrf, err := open(device + "/addr")
		if err != nil {
			return nil, err
		}
		defer deviceaddrf.close()

true, "sort": 0, "value_type": "individual" }, "type": "graph", "xaxis": { "buckets": null, "mode": "time", "name": null, "show": true, "values": [] }, "yaxes": [ { "format": "short", "label": null, "logBase": 1, "max": null, "min": null, "show": true }, { "format": "short", "label": null, "logBase": 1, "max": null, "min": null, "show": false } ], "yaxis": { "align": false, "alignLevel": null } }, { "collapsed": false, "gridPos": { "h": 1, "w": 24, "x": 0, "y": 6 }, "id": 62, "panels": [], "title":...

			handlerInvoked:     1,
			closeExpected:      "",
			retryAfterExpected: "",
			statusCodeExpected: http.StatusOK,
		},
		{
			name: "retry-after enabled, request is exempt(local loopback)",
			shutdownDelayDurationElapsedFn: func() <-chan struct{} {
				return newChannel(true)
			},
			requestURL:         "/api/v1/namespaces",
			userAgent:          "kube-apiserver/",
			handlerInvoked:     1,

func isRequestExemptFromRetryAfter(r *http.Request) bool {
	return isKubeApiserverUserAgent(r) || hasExemptPathPrefix(r)
}

// isKubeApiserverUserAgent returns true if the user-agent matches
// the one set by the local loopback.
// NOTE: we can't look up the authenticated user informaion from the
// request context since the authentication filter has not executed yet.
func isKubeApiserverUserAgent(req *http.Request) bool {

# If not set, defaults to "1337".
# ISTIO_INBOUND_TPROXY_MARK=1337

# When the interception mode is "TPROXY", the number of the routing table that
# is configured and used to route inbound connections to the loopback interface
# in order to be redirected to Envoy.
# If not set, defaults to "133".
# ISTIO_INBOUND_TPROXY_ROUTE_TABLE=133

# Comma separated list of local ports that will use Istio sidecar for inbound services.

					// they match the new predecessor count of `s`.
					// Since s did not have a Phi op corresponding to
					// the phi op in b, the other edges coming into s
					// must be loopback edges from s, so v is the right
					// argument to v!
					args := make([]*Value, len(v.Args))
					copy(args, v.Args)
					v.resetArgs()
					for x := 0; x < j; x++ {
						v.AddArg(v)
					}

        then:
        handle.waitForFinish()

        where:
        taskName << ['runJavaExec', 'runExecOperationsJavaExec', 'test']
    }

    /** To test attaching the debugger via a non-loopback network interface, we need to choose an IP address of such an interface. */
    private static final String nonLoopbackAddress() {
        println("Looking at network interfaces")