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	The provided DialContext wraps existing clients' DialContext in an attempt to preserve any existing timeout configuration. In some cases, we may replace infinite timeouts with golang defaults. - scaleio: tcp connect/keepalive values changed from 0/15 to 30/30 - storageos: no change
		
			
				
	
	
		
			662 lines
		
	
	
		
			18 KiB
		
	
	
	
		
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			662 lines
		
	
	
		
			18 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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    http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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	"context"
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	"fmt"
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	"net"
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	"reflect"
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	"testing"
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	v1 "k8s.io/api/core/v1"
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	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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	"k8s.io/apimachinery/pkg/util/sets"
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	fake "k8s.io/kubernetes/pkg/proxy/util/testing"
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)
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func TestValidateWorks(t *testing.T) {
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	if isValidEndpoint("", 0) {
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		t.Errorf("Didn't fail for empty set")
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	}
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	if isValidEndpoint("foobar", 0) {
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		t.Errorf("Didn't fail with invalid port")
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	}
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	if isValidEndpoint("foobar", -1) {
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		t.Errorf("Didn't fail with a negative port")
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	}
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	if !isValidEndpoint("foobar", 8080) {
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		t.Errorf("Failed a valid config.")
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	}
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}
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func TestBuildPortsToEndpointsMap(t *testing.T) {
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	endpoints := &v1.Endpoints{
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		ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "testnamespace"},
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		Subsets: []v1.EndpointSubset{
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			{
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				Addresses: []v1.EndpointAddress{
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					{IP: "10.0.0.1"},
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					{IP: "10.0.0.2"},
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				},
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				Ports: []v1.EndpointPort{
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					{Name: "http", Port: 80},
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					{Name: "https", Port: 443},
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				},
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			},
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			{
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				Addresses: []v1.EndpointAddress{
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					{IP: "10.0.0.1"},
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					{IP: "10.0.0.3"},
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				},
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				Ports: []v1.EndpointPort{
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					{Name: "http", Port: 8080},
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					{Name: "dns", Port: 53},
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				},
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			},
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			{
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				Addresses: []v1.EndpointAddress{},
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				Ports: []v1.EndpointPort{
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					{Name: "http", Port: 8888},
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					{Name: "ssh", Port: 22},
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				},
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			},
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			{
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				Addresses: []v1.EndpointAddress{
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					{IP: "10.0.0.1"},
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				},
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				Ports: []v1.EndpointPort{},
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			},
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		},
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	}
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	expectedPortsToEndpoints := map[string][]string{
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		"http":  {"10.0.0.1:80", "10.0.0.2:80", "10.0.0.1:8080", "10.0.0.3:8080"},
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		"https": {"10.0.0.1:443", "10.0.0.2:443"},
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		"dns":   {"10.0.0.1:53", "10.0.0.3:53"},
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	}
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	portsToEndpoints := BuildPortsToEndpointsMap(endpoints)
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	if !reflect.DeepEqual(expectedPortsToEndpoints, portsToEndpoints) {
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		t.Errorf("expected ports to endpoints not seen")
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	}
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}
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func TestIsProxyableIP(t *testing.T) {
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	testCases := []struct {
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		ip   string
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		want error
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	}{
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		{"127.0.0.1", ErrAddressNotAllowed},
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		{"127.0.0.2", ErrAddressNotAllowed},
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		{"169.254.169.254", ErrAddressNotAllowed},
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		{"169.254.1.1", ErrAddressNotAllowed},
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		{"224.0.0.0", ErrAddressNotAllowed},
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		{"10.0.0.1", nil},
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		{"192.168.0.1", nil},
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		{"172.16.0.1", nil},
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		{"8.8.8.8", nil},
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		{"::1", ErrAddressNotAllowed},
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		{"fe80::", ErrAddressNotAllowed},
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		{"ff02::", ErrAddressNotAllowed},
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		{"ff01::", ErrAddressNotAllowed},
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		{"2600::", nil},
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		{"1", ErrAddressNotAllowed},
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		{"", ErrAddressNotAllowed},
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	}
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	for i := range testCases {
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		got := IsProxyableIP(testCases[i].ip)
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		if testCases[i].want != got {
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			t.Errorf("case %d: expected %v, got %v", i, testCases[i].want, got)
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		}
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	}
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}
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type dummyResolver struct {
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	ips []string
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	err error
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}
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func (r *dummyResolver) LookupIPAddr(ctx context.Context, host string) ([]net.IPAddr, error) {
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	if r.err != nil {
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		return nil, r.err
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	}
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	resp := []net.IPAddr{}
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	for _, ipString := range r.ips {
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		resp = append(resp, net.IPAddr{IP: net.ParseIP(ipString)})
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	}
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	return resp, nil
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}
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func TestIsProxyableHostname(t *testing.T) {
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	testCases := []struct {
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		hostname string
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		ips      []string
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		want     error
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	}{
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		{"k8s.io", []string{}, ErrNoAddresses},
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		{"k8s.io", []string{"8.8.8.8"}, nil},
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		{"k8s.io", []string{"169.254.169.254"}, ErrAddressNotAllowed},
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		{"k8s.io", []string{"127.0.0.1", "8.8.8.8"}, ErrAddressNotAllowed},
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	}
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	for i := range testCases {
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		resolv := dummyResolver{ips: testCases[i].ips}
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		got := IsProxyableHostname(context.Background(), &resolv, testCases[i].hostname)
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		if testCases[i].want != got {
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			t.Errorf("case %d: expected %v, got %v", i, testCases[i].want, got)
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		}
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	}
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}
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func TestIsAllowedHost(t *testing.T) {
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	testCases := []struct {
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		ip     string
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		denied []string
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		want   error
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	}{
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		{"8.8.8.8", []string{}, nil},
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		{"169.254.169.254", []string{"169.0.0.0/8"}, ErrAddressNotAllowed},
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		{"169.254.169.254", []string{"fce8::/15", "169.254.169.0/24"}, ErrAddressNotAllowed},
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		{"fce9:beef::", []string{"fce8::/15", "169.254.169.0/24"}, ErrAddressNotAllowed},
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		{"127.0.0.1", []string{"127.0.0.1/32"}, ErrAddressNotAllowed},
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		{"34.107.204.206", []string{"fce8::/15"}, nil},
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		{"fce9:beef::", []string{"127.0.0.1/32"}, nil},
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		{"34.107.204.206", []string{"127.0.0.1/32"}, nil},
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		{"127.0.0.1", []string{}, nil},
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	}
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	for i := range testCases {
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		var denyList []*net.IPNet
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		for _, cidrStr := range testCases[i].denied {
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			_, ipNet, err := net.ParseCIDR(cidrStr)
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			if err != nil {
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				t.Fatalf("bad IP for test case: %v: %v", cidrStr, err)
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			}
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			denyList = append(denyList, ipNet)
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		}
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		got := IsAllowedHost(net.ParseIP(testCases[i].ip), denyList)
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		if testCases[i].want != got {
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			t.Errorf("case %d: expected %v, got %v", i, testCases[i].want, got)
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		}
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	}
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}
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func TestShouldSkipService(t *testing.T) {
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	testCases := []struct {
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		service    *v1.Service
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		shouldSkip bool
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	}{
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		{
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			// Cluster IP is None
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			service: &v1.Service{
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				ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
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				Spec: v1.ServiceSpec{
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					ClusterIP: v1.ClusterIPNone,
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				},
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			},
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			shouldSkip: true,
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		},
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		{
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			// Cluster IP is empty
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			service: &v1.Service{
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				ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
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				Spec: v1.ServiceSpec{
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					ClusterIP: "",
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				},
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			},
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			shouldSkip: true,
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		},
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		{
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			// ExternalName type service
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			service: &v1.Service{
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				ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
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				Spec: v1.ServiceSpec{
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					ClusterIP: "1.2.3.4",
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					Type:      v1.ServiceTypeExternalName,
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				},
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			},
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			shouldSkip: true,
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		},
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		{
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			// ClusterIP type service with ClusterIP set
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			service: &v1.Service{
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				ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
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				Spec: v1.ServiceSpec{
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					ClusterIP: "1.2.3.4",
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					Type:      v1.ServiceTypeClusterIP,
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				},
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			},
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			shouldSkip: false,
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		},
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		{
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			// NodePort type service with ClusterIP set
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			service: &v1.Service{
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				ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
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				Spec: v1.ServiceSpec{
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					ClusterIP: "1.2.3.4",
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					Type:      v1.ServiceTypeNodePort,
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				},
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			},
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			shouldSkip: false,
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		},
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		{
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			// LoadBalancer type service with ClusterIP set
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			service: &v1.Service{
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				ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
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				Spec: v1.ServiceSpec{
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					ClusterIP: "1.2.3.4",
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					Type:      v1.ServiceTypeLoadBalancer,
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				},
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						|
			},
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			shouldSkip: false,
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		},
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	}
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	for i := range testCases {
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		skip := ShouldSkipService(testCases[i].service)
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		if skip != testCases[i].shouldSkip {
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			t.Errorf("case %d: expect %v, got %v", i, testCases[i].shouldSkip, skip)
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		}
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	}
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}
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type InterfaceAddrsPair struct {
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	itf   net.Interface
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	addrs []net.Addr
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}
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 | 
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func TestGetNodeAddressses(t *testing.T) {
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	testCases := []struct {
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		cidrs         []string
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		nw            *fake.FakeNetwork
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		itfAddrsPairs []InterfaceAddrsPair
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		expected      sets.String
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		expectedErr   error
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	}{
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		{ // case 0
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			cidrs: []string{"10.20.30.0/24"},
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			nw:    fake.NewFakeNetwork(),
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			itfAddrsPairs: []InterfaceAddrsPair{
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				{
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					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
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					addrs: []net.Addr{fake.AddrStruct{Val: "10.20.30.51/24"}},
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				},
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				{
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					itf:   net.Interface{Index: 2, MTU: 0, Name: "eth1", HardwareAddr: nil, Flags: 0},
 | 
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					addrs: []net.Addr{fake.AddrStruct{Val: "100.200.201.1/24"}},
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				},
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			},
 | 
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			expected: sets.NewString("10.20.30.51"),
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		},
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		{ // case 1
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			cidrs: []string{"0.0.0.0/0"},
 | 
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			nw:    fake.NewFakeNetwork(),
 | 
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			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
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					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
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					addrs: []net.Addr{fake.AddrStruct{Val: "10.20.30.51/24"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "127.0.0.1/8"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("0.0.0.0/0"),
 | 
						|
		},
 | 
						|
		{ // case 2
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			cidrs: []string{"2001:db8::/32", "::1/128"},
 | 
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			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "2001:db8::1/32"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("2001:db8::1", "::1"),
 | 
						|
		},
 | 
						|
		{ // case 3
 | 
						|
			cidrs: []string{"::/0"},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "2001:db8::1/32"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("::/0"),
 | 
						|
		},
 | 
						|
		{ // case 4
 | 
						|
			cidrs: []string{"127.0.0.1/32"},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "10.20.30.51/24"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "127.0.0.1/8"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("127.0.0.1"),
 | 
						|
		},
 | 
						|
		{ // case 5
 | 
						|
			cidrs: []string{"127.0.0.0/8"},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "127.0.1.1/8"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("127.0.1.1"),
 | 
						|
		},
 | 
						|
		{ // case 6
 | 
						|
			cidrs: []string{"10.20.30.0/24", "100.200.201.0/24"},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "10.20.30.51/24"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 2, MTU: 0, Name: "eth1", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "100.200.201.1/24"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("10.20.30.51", "100.200.201.1"),
 | 
						|
		},
 | 
						|
		{ // case 7
 | 
						|
			cidrs: []string{"10.20.30.0/24", "100.200.201.0/24"},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "192.168.1.2/24"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "127.0.0.1/8"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected:    nil,
 | 
						|
			expectedErr: fmt.Errorf("no addresses found for cidrs %v", []string{"10.20.30.0/24", "100.200.201.0/24"}),
 | 
						|
		},
 | 
						|
		{ // case 8
 | 
						|
			cidrs: []string{},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "192.168.1.2/24"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "127.0.0.1/8"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("0.0.0.0/0", "::/0"),
 | 
						|
		},
 | 
						|
		{ // case 9
 | 
						|
			cidrs: []string{},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "2001:db8::1/32"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("0.0.0.0/0", "::/0"),
 | 
						|
		},
 | 
						|
		{ // case 9
 | 
						|
			cidrs: []string{"1.2.3.0/24", "0.0.0.0/0"},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "1.2.3.4/30"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("0.0.0.0/0"),
 | 
						|
		},
 | 
						|
		{ // case 10
 | 
						|
			cidrs: []string{"0.0.0.0/0", "1.2.3.0/24", "::1/128"},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "1.2.3.4/30"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("0.0.0.0/0", "::1"),
 | 
						|
		},
 | 
						|
		{ // case 11
 | 
						|
			cidrs: []string{"::/0", "1.2.3.0/24", "::1/128"},
 | 
						|
			nw:    fake.NewFakeNetwork(),
 | 
						|
			itfAddrsPairs: []InterfaceAddrsPair{
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "1.2.3.4/30"}},
 | 
						|
				},
 | 
						|
				{
 | 
						|
					itf:   net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
 | 
						|
					addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
 | 
						|
				},
 | 
						|
			},
 | 
						|
			expected: sets.NewString("::/0", "1.2.3.4"),
 | 
						|
		},
 | 
						|
	}
 | 
						|
 | 
						|
	for i := range testCases {
 | 
						|
		for _, pair := range testCases[i].itfAddrsPairs {
 | 
						|
			testCases[i].nw.AddInterfaceAddr(&pair.itf, pair.addrs)
 | 
						|
		}
 | 
						|
		addrList, err := GetNodeAddresses(testCases[i].cidrs, testCases[i].nw)
 | 
						|
		if !reflect.DeepEqual(err, testCases[i].expectedErr) {
 | 
						|
			t.Errorf("case [%d], unexpected error: %v", i, err)
 | 
						|
		}
 | 
						|
 | 
						|
		if !addrList.Equal(testCases[i].expected) {
 | 
						|
			t.Errorf("case [%d], unexpected mismatch, expected: %v, got: %v", i, testCases[i].expected, addrList)
 | 
						|
		}
 | 
						|
	}
 | 
						|
}
 | 
						|
 | 
						|
func TestAppendPortIfNeeded(t *testing.T) {
 | 
						|
	testCases := []struct {
 | 
						|
		name   string
 | 
						|
		addr   string
 | 
						|
		port   int32
 | 
						|
		expect string
 | 
						|
	}{
 | 
						|
		{
 | 
						|
			name:   "IPv4 all-zeros bind address has port",
 | 
						|
			addr:   "0.0.0.0:12345",
 | 
						|
			port:   23456,
 | 
						|
			expect: "0.0.0.0:12345",
 | 
						|
		},
 | 
						|
		{
 | 
						|
			name:   "non-zeros IPv4 config",
 | 
						|
			addr:   "9.8.7.6",
 | 
						|
			port:   12345,
 | 
						|
			expect: "9.8.7.6:12345",
 | 
						|
		},
 | 
						|
		{
 | 
						|
			name:   "IPv6 \"[::]\" bind address has port",
 | 
						|
			addr:   "[::]:12345",
 | 
						|
			port:   23456,
 | 
						|
			expect: "[::]:12345",
 | 
						|
		},
 | 
						|
		{
 | 
						|
			name:   "IPv6 config",
 | 
						|
			addr:   "fd00:1::5",
 | 
						|
			port:   23456,
 | 
						|
			expect: "[fd00:1::5]:23456",
 | 
						|
		},
 | 
						|
		{
 | 
						|
			name:   "Invalid IPv6 Config",
 | 
						|
			addr:   "[fd00:1::5]",
 | 
						|
			port:   12345,
 | 
						|
			expect: "[fd00:1::5]",
 | 
						|
		},
 | 
						|
	}
 | 
						|
 | 
						|
	for i := range testCases {
 | 
						|
		got := AppendPortIfNeeded(testCases[i].addr, testCases[i].port)
 | 
						|
		if testCases[i].expect != got {
 | 
						|
			t.Errorf("case %s: expected %v, got %v", testCases[i].name, testCases[i].expect, got)
 | 
						|
		}
 | 
						|
	}
 | 
						|
}
 | 
						|
 | 
						|
func TestShuffleStrings(t *testing.T) {
 | 
						|
	var src []string
 | 
						|
	dest := ShuffleStrings(src)
 | 
						|
 | 
						|
	if dest != nil {
 | 
						|
		t.Errorf("ShuffleStrings for a nil slice got a non-nil slice")
 | 
						|
	}
 | 
						|
 | 
						|
	src = []string{"a", "b", "c", "d", "e", "f"}
 | 
						|
	dest = ShuffleStrings(src)
 | 
						|
 | 
						|
	if len(src) != len(dest) {
 | 
						|
		t.Errorf("Shuffled slice is wrong length, expected %v got %v", len(src), len(dest))
 | 
						|
	}
 | 
						|
 | 
						|
	m := make(map[string]bool, len(dest))
 | 
						|
	for _, s := range dest {
 | 
						|
		m[s] = true
 | 
						|
	}
 | 
						|
 | 
						|
	for _, k := range src {
 | 
						|
		if _, exists := m[k]; !exists {
 | 
						|
			t.Errorf("Element %v missing from shuffled slice", k)
 | 
						|
		}
 | 
						|
	}
 | 
						|
}
 | 
						|
 | 
						|
func TestFilterIncorrectIPVersion(t *testing.T) {
 | 
						|
	testCases := []struct {
 | 
						|
		desc            string
 | 
						|
		ipString        []string
 | 
						|
		wantIPv6        bool
 | 
						|
		expectCorrect   []string
 | 
						|
		expectIncorrect []string
 | 
						|
	}{
 | 
						|
		{
 | 
						|
			desc:            "empty input IPv4",
 | 
						|
			ipString:        []string{},
 | 
						|
			wantIPv6:        false,
 | 
						|
			expectCorrect:   nil,
 | 
						|
			expectIncorrect: nil,
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "empty input IPv6",
 | 
						|
			ipString:        []string{},
 | 
						|
			wantIPv6:        true,
 | 
						|
			expectCorrect:   nil,
 | 
						|
			expectIncorrect: nil,
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "want IPv4 and receive IPv6",
 | 
						|
			ipString:        []string{"fd00:20::1"},
 | 
						|
			wantIPv6:        false,
 | 
						|
			expectCorrect:   nil,
 | 
						|
			expectIncorrect: []string{"fd00:20::1"},
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "want IPv6 and receive IPv4",
 | 
						|
			ipString:        []string{"192.168.200.2"},
 | 
						|
			wantIPv6:        true,
 | 
						|
			expectCorrect:   nil,
 | 
						|
			expectIncorrect: []string{"192.168.200.2"},
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "want IPv6 and receive IPv4 and IPv6",
 | 
						|
			ipString:        []string{"192.168.200.2", "192.1.34.23", "fd00:20::1", "2001:db9::3"},
 | 
						|
			wantIPv6:        true,
 | 
						|
			expectCorrect:   []string{"fd00:20::1", "2001:db9::3"},
 | 
						|
			expectIncorrect: []string{"192.168.200.2", "192.1.34.23"},
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "want IPv4 and receive IPv4 and IPv6",
 | 
						|
			ipString:        []string{"192.168.200.2", "192.1.34.23", "fd00:20::1", "2001:db9::3"},
 | 
						|
			wantIPv6:        false,
 | 
						|
			expectCorrect:   []string{"192.168.200.2", "192.1.34.23"},
 | 
						|
			expectIncorrect: []string{"fd00:20::1", "2001:db9::3"},
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "want IPv4 and receive IPv4 only",
 | 
						|
			ipString:        []string{"192.168.200.2", "192.1.34.23"},
 | 
						|
			wantIPv6:        false,
 | 
						|
			expectCorrect:   []string{"192.168.200.2", "192.1.34.23"},
 | 
						|
			expectIncorrect: nil,
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "want IPv6 and receive IPv4 only",
 | 
						|
			ipString:        []string{"192.168.200.2", "192.1.34.23"},
 | 
						|
			wantIPv6:        true,
 | 
						|
			expectCorrect:   nil,
 | 
						|
			expectIncorrect: []string{"192.168.200.2", "192.1.34.23"},
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "want IPv4 and receive IPv6 only",
 | 
						|
			ipString:        []string{"fd00:20::1", "2001:db9::3"},
 | 
						|
			wantIPv6:        false,
 | 
						|
			expectCorrect:   nil,
 | 
						|
			expectIncorrect: []string{"fd00:20::1", "2001:db9::3"},
 | 
						|
		},
 | 
						|
		{
 | 
						|
			desc:            "want IPv6 and receive IPv6 only",
 | 
						|
			ipString:        []string{"fd00:20::1", "2001:db9::3"},
 | 
						|
			wantIPv6:        true,
 | 
						|
			expectCorrect:   []string{"fd00:20::1", "2001:db9::3"},
 | 
						|
			expectIncorrect: nil,
 | 
						|
		},
 | 
						|
	}
 | 
						|
 | 
						|
	for _, testcase := range testCases {
 | 
						|
		t.Run(testcase.desc, func(t *testing.T) {
 | 
						|
			correct, incorrect := FilterIncorrectIPVersion(testcase.ipString, testcase.wantIPv6)
 | 
						|
			if !reflect.DeepEqual(testcase.expectCorrect, correct) {
 | 
						|
				t.Errorf("Test %v failed: expected %v, got %v", testcase.desc, testcase.expectCorrect, correct)
 | 
						|
			}
 | 
						|
			if !reflect.DeepEqual(testcase.expectIncorrect, incorrect) {
 | 
						|
				t.Errorf("Test %v failed: expected %v, got %v", testcase.desc, testcase.expectIncorrect, incorrect)
 | 
						|
			}
 | 
						|
		})
 | 
						|
	}
 | 
						|
}
 |