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04eced5c6716abf6b65da17e84afef1f49edacce
kubernetes/pkg/proxy/util/utils_test.go
Jordan Liggitt ce553e1b68 Resolve IP addresses of host-only in filtered dialer
2021-01-26 12:00:53 -05:00

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/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package util
import (
"bytes"
"context"
"fmt"
"net"
"reflect"
"strings"
"testing"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/sets"
fake "k8s.io/kubernetes/pkg/proxy/util/testing"
)
func TestValidateWorks(t *testing.T) {
if isValidEndpoint("", 0) {
t.Errorf("Didn't fail for empty set")
}
if isValidEndpoint("foobar", 0) {
t.Errorf("Didn't fail with invalid port")
}
if isValidEndpoint("foobar", -1) {
t.Errorf("Didn't fail with a negative port")
}
if !isValidEndpoint("foobar", 8080) {
t.Errorf("Failed a valid config.")
}
}
func TestBuildPortsToEndpointsMap(t *testing.T) {
endpoints := &v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "testnamespace"},
Subsets: []v1.EndpointSubset{
{
Addresses: []v1.EndpointAddress{
{IP: "10.0.0.1"},
{IP: "10.0.0.2"},
},
Ports: []v1.EndpointPort{
{Name: "http", Port: 80},
{Name: "https", Port: 443},
},
},
{
Addresses: []v1.EndpointAddress{
{IP: "10.0.0.1"},
{IP: "10.0.0.3"},
},
Ports: []v1.EndpointPort{
{Name: "http", Port: 8080},
{Name: "dns", Port: 53},
},
},
{
Addresses: []v1.EndpointAddress{},
Ports: []v1.EndpointPort{
{Name: "http", Port: 8888},
{Name: "ssh", Port: 22},
},
},
{
Addresses: []v1.EndpointAddress{
{IP: "10.0.0.1"},
},
Ports: []v1.EndpointPort{},
},
},
}
expectedPortsToEndpoints := map[string][]string{
"http": {"10.0.0.1:80", "10.0.0.2:80", "10.0.0.1:8080", "10.0.0.3:8080"},
"https": {"10.0.0.1:443", "10.0.0.2:443"},
"dns": {"10.0.0.1:53", "10.0.0.3:53"},
}
portsToEndpoints := BuildPortsToEndpointsMap(endpoints)
if !reflect.DeepEqual(expectedPortsToEndpoints, portsToEndpoints) {
t.Errorf("expected ports to endpoints not seen")
}
}
func TestIsProxyableIP(t *testing.T) {
testCases := []struct {
ip string
want error
}{
{"127.0.0.1", ErrAddressNotAllowed},
{"127.0.0.2", ErrAddressNotAllowed},
{"169.254.169.254", ErrAddressNotAllowed},
{"169.254.1.1", ErrAddressNotAllowed},
{"224.0.0.0", ErrAddressNotAllowed},
{"10.0.0.1", nil},
{"192.168.0.1", nil},
{"172.16.0.1", nil},
{"8.8.8.8", nil},
{"::1", ErrAddressNotAllowed},
{"fe80::", ErrAddressNotAllowed},
{"ff02::", ErrAddressNotAllowed},
{"ff01::", ErrAddressNotAllowed},
{"2600::", nil},
{"1", ErrAddressNotAllowed},
{"", ErrAddressNotAllowed},
}
for i := range testCases {
got := IsProxyableIP(testCases[i].ip)
if testCases[i].want != got {
t.Errorf("case %d: expected %v, got %v", i, testCases[i].want, got)
}
}
}
type dummyResolver struct {
ips []string
err error
}
func (r *dummyResolver) LookupIPAddr(ctx context.Context, host string) ([]net.IPAddr, error) {
if r.err != nil {
return nil, r.err
}
resp := []net.IPAddr{}
for _, ipString := range r.ips {
resp = append(resp, net.IPAddr{IP: net.ParseIP(ipString)})
}
return resp, nil
}
func TestIsProxyableHostname(t *testing.T) {
testCases := []struct {
hostname string
ips []string
want error
}{
{"k8s.io", []string{}, ErrNoAddresses},
{"k8s.io", []string{"8.8.8.8"}, nil},
{"k8s.io", []string{"169.254.169.254"}, ErrAddressNotAllowed},
{"k8s.io", []string{"127.0.0.1", "8.8.8.8"}, ErrAddressNotAllowed},
}
for i := range testCases {
resolv := dummyResolver{ips: testCases[i].ips}
got := IsProxyableHostname(context.Background(), &resolv, testCases[i].hostname)
if testCases[i].want != got {
t.Errorf("case %d: expected %v, got %v", i, testCases[i].want, got)
}
}
}
func TestIsAllowedHost(t *testing.T) {
testCases := []struct {
ip string
denied []string
want error
}{
{"8.8.8.8", []string{}, nil},
{"169.254.169.254", []string{"169.0.0.0/8"}, ErrAddressNotAllowed},
{"169.254.169.254", []string{"fce8::/15", "169.254.169.0/24"}, ErrAddressNotAllowed},
{"fce9:beef::", []string{"fce8::/15", "169.254.169.0/24"}, ErrAddressNotAllowed},
{"127.0.0.1", []string{"127.0.0.1/32"}, ErrAddressNotAllowed},
{"34.107.204.206", []string{"fce8::/15"}, nil},
{"fce9:beef::", []string{"127.0.0.1/32"}, nil},
{"34.107.204.206", []string{"127.0.0.1/32"}, nil},
{"127.0.0.1", []string{}, nil},
}
for i := range testCases {
var denyList []*net.IPNet
for _, cidrStr := range testCases[i].denied {
_, ipNet, err := net.ParseCIDR(cidrStr)
if err != nil {
t.Fatalf("bad IP for test case: %v: %v", cidrStr, err)
}
denyList = append(denyList, ipNet)
}
got := IsAllowedHost(net.ParseIP(testCases[i].ip), denyList)
if testCases[i].want != got {
t.Errorf("case %d: expected %v, got %v", i, testCases[i].want, got)
}
}
}
func TestShouldSkipService(t *testing.T) {
testCases := []struct {
service *v1.Service
shouldSkip bool
}{
{
// Cluster IP is None
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: v1.ClusterIPNone,
},
},
shouldSkip: true,
},
{
// Cluster IP is empty
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "",
},
},
shouldSkip: true,
},
{
// ExternalName type service
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "1.2.3.4",
Type: v1.ServiceTypeExternalName,
},
},
shouldSkip: true,
},
{
// ClusterIP type service with ClusterIP set
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "1.2.3.4",
Type: v1.ServiceTypeClusterIP,
},
},
shouldSkip: false,
},
{
// NodePort type service with ClusterIP set
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "1.2.3.4",
Type: v1.ServiceTypeNodePort,
},
},
shouldSkip: false,
},
{
// LoadBalancer type service with ClusterIP set
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "1.2.3.4",
Type: v1.ServiceTypeLoadBalancer,
},
},
shouldSkip: false,
},
}
for i := range testCases {
skip := ShouldSkipService(testCases[i].service)
if skip != testCases[i].shouldSkip {
t.Errorf("case %d: expect %v, got %v", i, testCases[i].shouldSkip, skip)
}
}
}
func TestNewFilteredDialContext(t *testing.T) {
_, cidr, _ := net.ParseCIDR("1.1.1.1/28")
testCases := []struct {
name string
// opts passed to NewFilteredDialContext
opts *FilteredDialOptions
// value passed to dial
dial string
// value expected to be passed to resolve
expectResolve string
// result from resolver
resolveTo []net.IPAddr
resolveErr error
// expect the wrapped dialer to be called
expectWrappedDial bool
// expect an error result
expectErr string
}{
{
name: "allow with nil opts",
opts: nil,
dial: "127.0.0.1:8080",
expectResolve: "", // resolver not called, no-op opts
expectWrappedDial: true,
expectErr: "",
},
{
name: "allow localhost",
opts: &FilteredDialOptions{AllowLocalLoopback: true},
dial: "127.0.0.1:8080",
expectResolve: "", // resolver not called, no-op opts
expectWrappedDial: true,
expectErr: "",
},
{
name: "disallow localhost",
opts: &FilteredDialOptions{AllowLocalLoopback: false},
dial: "127.0.0.1:8080",
expectResolve: "127.0.0.1",
resolveTo: []net.IPAddr{{IP: net.ParseIP("127.0.0.1")}},
expectWrappedDial: false,
expectErr: "address not allowed",
},
{
name: "disallow IP",
opts: &FilteredDialOptions{AllowLocalLoopback: false, DialHostCIDRDenylist: []*net.IPNet{cidr}},
dial: "foo.com:8080",
expectResolve: "foo.com",
resolveTo: []net.IPAddr{{IP: net.ParseIP("1.1.1.1")}},
expectWrappedDial: false,
expectErr: "address not allowed",
},
{
name: "allow IP",
opts: &FilteredDialOptions{AllowLocalLoopback: false, DialHostCIDRDenylist: []*net.IPNet{cidr}},
dial: "foo.com:8080",
expectResolve: "foo.com",
resolveTo: []net.IPAddr{{IP: net.ParseIP("2.2.2.2")}},
expectWrappedDial: true,
expectErr: "",
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
wrappedDialer := &testDialer{}
testResolver := &testResolver{addrs: tc.resolveTo, err: tc.resolveErr}
dialer := NewFilteredDialContext(wrappedDialer.DialContext, testResolver, tc.opts)
_, err := dialer(context.TODO(), "tcp", tc.dial)
if tc.expectResolve != testResolver.resolveAddress {
t.Fatalf("expected to resolve %s, got %s", tc.expectResolve, testResolver.resolveAddress)
}
if tc.expectWrappedDial != wrappedDialer.called {
t.Fatalf("expected wrapped dialer called %v, got %v", tc.expectWrappedDial, wrappedDialer.called)
}
if err != nil {
if len(tc.expectErr) == 0 {
t.Fatalf("unexpected error: %v", err)
} else if !strings.Contains(err.Error(), tc.expectErr) {
t.Fatalf("expected error containing %q, got %v", tc.expectErr, err)
}
} else {
if len(tc.expectErr) > 0 {
t.Fatalf("expected error, got none")
}
}
})
}
}
type testDialer struct {
called bool
}
func (t *testDialer) DialContext(_ context.Context, network, address string) (net.Conn, error) {
t.called = true
return nil, nil
}
type testResolver struct {
addrs []net.IPAddr
err error
resolveAddress string
}
func (t *testResolver) LookupIPAddr(_ context.Context, address string) ([]net.IPAddr, error) {
t.resolveAddress = address
return t.addrs, t.err
}
type InterfaceAddrsPair struct {
itf net.Interface
addrs []net.Addr
}
func TestGetNodeAddressses(t *testing.T) {
testCases := []struct {
cidrs []string
nw *fake.FakeNetwork
itfAddrsPairs []InterfaceAddrsPair
expected sets.String
expectedErr error
}{
{ // case 0
cidrs: []string{"10.20.30.0/24"},
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"),
},
{ // case 1
cidrs: []string{"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: "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
cidrs: []string{"2001:db8::/32", "::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: "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 TestMapIPsByIPFamily(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) {
ipFamily := v1.IPv4Protocol
otherIPFamily := v1.IPv6Protocol
if testcase.wantIPv6 {
ipFamily = v1.IPv6Protocol
otherIPFamily = v1.IPv4Protocol
}
ipMap := MapIPsByIPFamily(testcase.ipString)
if !reflect.DeepEqual(testcase.expectCorrect, ipMap[ipFamily]) {
t.Errorf("Test %v failed: expected %v, got %v", testcase.desc, testcase.expectCorrect, ipMap[ipFamily])
}
if !reflect.DeepEqual(testcase.expectIncorrect, ipMap[otherIPFamily]) {
t.Errorf("Test %v failed: expected %v, got %v", testcase.desc, testcase.expectIncorrect, ipMap[otherIPFamily])
}
})
}
}
func TestMapCIDRsByIPFamily(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::1/64"},
wantIPv6: false,
expectCorrect: nil,
expectIncorrect: []string{"fd00:20::1/64"},
},
{
desc: "want IPv6 and receive IPv4",
ipString: []string{"192.168.200.2/24"},
wantIPv6: true,
expectCorrect: nil,
expectIncorrect: []string{"192.168.200.2/24"},
},
{
desc: "want IPv6 and receive IPv4 and IPv6",
ipString: []string{"192.168.200.2/24", "192.1.34.23/24", "fd00:20::1/64", "2001:db9::3/64"},
wantIPv6: true,
expectCorrect: []string{"fd00:20::1/64", "2001:db9::3/64"},
expectIncorrect: []string{"192.168.200.2/24", "192.1.34.23/24"},
},
{
desc: "want IPv4 and receive IPv4 and IPv6",
ipString: []string{"192.168.200.2/24", "192.1.34.23/24", "fd00:20::1/64", "2001:db9::3/64"},
wantIPv6: false,
expectCorrect: []string{"192.168.200.2/24", "192.1.34.23/24"},
expectIncorrect: []string{"fd00:20::1/64", "2001:db9::3/64"},
},
{
desc: "want IPv4 and receive IPv4 only",
ipString: []string{"192.168.200.2/24", "192.1.34.23/24"},
wantIPv6: false,
expectCorrect: []string{"192.168.200.2/24", "192.1.34.23/24"},
expectIncorrect: nil,
},
{
desc: "want IPv6 and receive IPv4 only",
ipString: []string{"192.168.200.2/24", "192.1.34.23/24"},
wantIPv6: true,
expectCorrect: nil,
expectIncorrect: []string{"192.168.200.2/24", "192.1.34.23/24"},
},
{
desc: "want IPv4 and receive IPv6 only",
ipString: []string{"fd00:20::1/64", "2001:db9::3/64"},
wantIPv6: false,
expectCorrect: nil,
expectIncorrect: []string{"fd00:20::1/64", "2001:db9::3/64"},
},
{
desc: "want IPv6 and receive IPv6 only",
ipString: []string{"fd00:20::1/64", "2001:db9::3/64"},
wantIPv6: true,
expectCorrect: []string{"fd00:20::1/64", "2001:db9::3/64"},
expectIncorrect: nil,
},
}
for _, testcase := range testCases {
t.Run(testcase.desc, func(t *testing.T) {
ipFamily := v1.IPv4Protocol
otherIPFamily := v1.IPv6Protocol
if testcase.wantIPv6 {
ipFamily = v1.IPv6Protocol
otherIPFamily = v1.IPv4Protocol
}
cidrMap := MapCIDRsByIPFamily(testcase.ipString)
if !reflect.DeepEqual(testcase.expectCorrect, cidrMap[ipFamily]) {
t.Errorf("Test %v failed: expected %v, got %v", testcase.desc, testcase.expectCorrect, cidrMap[ipFamily])
}
if !reflect.DeepEqual(testcase.expectIncorrect, cidrMap[otherIPFamily]) {
t.Errorf("Test %v failed: expected %v, got %v", testcase.desc, testcase.expectIncorrect, cidrMap[otherIPFamily])
}
})
}
}
func TestGetClusterIPByFamily(t *testing.T) {
testCases := []struct {
name string
service v1.Service
requestFamily v1.IPFamily
expectedResult string
}{
{
name: "old style service ipv4. want ipv4",
requestFamily: v1.IPv4Protocol,
expectedResult: "10.0.0.10",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIP: "10.0.0.10",
},
},
},
{
name: "old style service ipv4. want ipv6",
requestFamily: v1.IPv6Protocol,
expectedResult: "",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIP: "10.0.0.10",
},
},
},
{
name: "old style service ipv6. want ipv6",
requestFamily: v1.IPv6Protocol,
expectedResult: "2000::1",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIP: "2000::1",
},
},
},
{
name: "old style service ipv6. want ipv4",
requestFamily: v1.IPv4Protocol,
expectedResult: "",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIP: "2000::1",
},
},
},
{
name: "service single stack ipv4. want ipv4",
requestFamily: v1.IPv4Protocol,
expectedResult: "10.0.0.10",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIPs: []string{"10.0.0.10"},
IPFamilies: []v1.IPFamily{v1.IPv4Protocol},
},
},
},
{
name: "service single stack ipv4. want ipv6",
requestFamily: v1.IPv6Protocol,
expectedResult: "",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIPs: []string{"10.0.0.10"},
IPFamilies: []v1.IPFamily{v1.IPv4Protocol},
},
},
},
{
name: "service single stack ipv6. want ipv6",
requestFamily: v1.IPv6Protocol,
expectedResult: "2000::1",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIPs: []string{"2000::1"},
IPFamilies: []v1.IPFamily{v1.IPv6Protocol},
},
},
},
{
name: "service single stack ipv6. want ipv4",
requestFamily: v1.IPv4Protocol,
expectedResult: "",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIPs: []string{"2000::1"},
IPFamilies: []v1.IPFamily{v1.IPv6Protocol},
},
},
},
// dual stack
{
name: "service dual stack ipv4,6. want ipv4",
requestFamily: v1.IPv4Protocol,
expectedResult: "10.0.0.10",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIPs: []string{"10.0.0.10", "2000::1"},
IPFamilies: []v1.IPFamily{v1.IPv4Protocol, v1.IPv6Protocol},
},
},
},
{
name: "service dual stack ipv4,6. want ipv6",
requestFamily: v1.IPv6Protocol,
expectedResult: "2000::1",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIPs: []string{"10.0.0.10", "2000::1"},
IPFamilies: []v1.IPFamily{v1.IPv4Protocol, v1.IPv6Protocol},
},
},
},
{
name: "service dual stack ipv6,4. want ipv6",
requestFamily: v1.IPv6Protocol,
expectedResult: "2000::1",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIPs: []string{"2000::1", "10.0.0.10"},
IPFamilies: []v1.IPFamily{v1.IPv6Protocol, v1.IPv4Protocol},
},
},
},
{
name: "service dual stack ipv6,4. want ipv4",
requestFamily: v1.IPv4Protocol,
expectedResult: "10.0.0.10",
service: v1.Service{
Spec: v1.ServiceSpec{
ClusterIPs: []string{"2000::1", "10.0.0.10"},
IPFamilies: []v1.IPFamily{v1.IPv6Protocol, v1.IPv4Protocol},
},
},
},
}
for _, testCase := range testCases {
t.Run(testCase.name, func(t *testing.T) {
ip := GetClusterIPByFamily(testCase.requestFamily, &testCase.service)
if ip != testCase.expectedResult {
t.Fatalf("expected ip:%v got %v", testCase.expectedResult, ip)
}
})
}
}
func TestWriteLine(t *testing.T) {
testCases := []struct {
name string
words []string
expected string
}{
{
name: "write no word",
words: []string{},
expected: "",
},
{
name: "write one word",
words: []string{"test1"},
expected: "test1\n",
},
{
name: "write multi word",
words: []string{"test1", "test2", "test3"},
expected: "test1 test2 test3\n",
},
}
testBuffer := bytes.NewBuffer(nil)
for _, testCase := range testCases {
t.Run(testCase.name, func(t *testing.T) {
testBuffer.Reset()
WriteLine(testBuffer, testCase.words...)
if !strings.EqualFold(testBuffer.String(), testCase.expected) {
t.Fatalf("write word is %v\n expected: %s, got: %s", testCase.words, testCase.expected, testBuffer.String())
}
})
}
}
func TestWriteBytesLine(t *testing.T) {
testCases := []struct {
name string
bytes []byte
expected string
}{
{
name: "empty bytes",
bytes: []byte{},
expected: "\n",
},
{
name: "test bytes",
bytes: []byte("test write bytes line"),
expected: "test write bytes line\n",
},
}
testBuffer := bytes.NewBuffer(nil)
for _, testCase := range testCases {
t.Run(testCase.name, func(t *testing.T) {
testBuffer.Reset()
WriteBytesLine(testBuffer, testCase.bytes)
if !strings.EqualFold(testBuffer.String(), testCase.expected) {
t.Fatalf("write word is %v\n expected: %s, got: %s", testCase.bytes, testCase.expected, testBuffer.String())
}
})
}
}
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