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5e96523913d265a3472922032a18fb0987db0bd2
kubernetes/pkg/controller/node/cidr_set_test.go
Robert Pothier 5e96523913 Adding IPv6 to cidr_set and cidr_set_test
2017-08-03 13:06:49 -04:00

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/*
Copyright 2016 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 node
import (
"math/big"
"net"
"reflect"
"testing"
"github.com/golang/glog"
)
func TestCIDRSetFullyAllocated(t *testing.T) {
cases := []struct {
clusterCIDRStr string
subNetMaskSize int
expectedCIDR string
description string
}{
{
clusterCIDRStr: "127.123.234.0/30",
subNetMaskSize: 30,
expectedCIDR: "127.123.234.0/30",
description: "Fully allocated CIDR with IPv4",
},
{
clusterCIDRStr: "beef:1234::/30",
subNetMaskSize: 30,
expectedCIDR: "beef:1234::/30",
description: "Fully allocated CIDR with IPv6",
},
}
for _, tc := range cases {
_, clusterCIDR, _ := net.ParseCIDR(tc.clusterCIDRStr)
a := newCIDRSet(clusterCIDR, tc.subNetMaskSize)
p, err := a.allocateNext()
if err != nil {
t.Fatalf("unexpected error: %v for %v", err, tc.description)
}
if p.String() != tc.expectedCIDR {
t.Fatalf("unexpected allocated cidr: %v, expecting %v for %v",
p.String(), tc.expectedCIDR, tc.description)
}
_, err = a.allocateNext()
if err == nil {
t.Fatalf("expected error because of fully-allocated range for %v", tc.description)
}
a.release(p)
p, err = a.allocateNext()
if err != nil {
t.Fatalf("unexpected error: %v for %v", err, tc.description)
}
if p.String() != tc.expectedCIDR {
t.Fatalf("unexpected allocated cidr: %v, expecting %v for %v",
p.String(), tc.expectedCIDR, tc.description)
}
_, err = a.allocateNext()
if err == nil {
t.Fatalf("expected error because of fully-allocated range for %v", tc.description)
}
}
}
func TestIndexToCIDRBlock(t *testing.T) {
cases := []struct {
clusterCIDRStr string
subnetMaskSize int
index int
CIDRBlock string
description string
}{
{
clusterCIDRStr: "127.123.3.0/16",
subnetMaskSize: 24,
index: 0,
CIDRBlock: "127.123.0.0/24",
description: "Index with IPv4",
},
{
clusterCIDRStr: "127.123.0.0/16",
subnetMaskSize: 24,
index: 15,
CIDRBlock: "127.123.15.0/24",
description: "Index with IPv4",
},
{
clusterCIDRStr: "192.168.5.219/28",
subnetMaskSize: 32,
index: 5,
CIDRBlock: "192.168.5.213/32",
description: "Index with IPv4",
},
{
clusterCIDRStr: "2001:0db8:1234:3::/48",
subnetMaskSize: 64,
index: 0,
CIDRBlock: "2001:db8:1234::/64",
description: "Index with IPv6",
},
{
clusterCIDRStr: "2001:0db8:1234::/48",
subnetMaskSize: 64,
index: 15,
CIDRBlock: "2001:db8:1234:f::/64",
description: "Index with IPv6",
},
{
clusterCIDRStr: "2001:0db8:85a3::8a2e:0370:7334/50",
subnetMaskSize: 63,
index: 6425,
CIDRBlock: "2001:db8:85a3:3232::/63",
description: "Index with IPv6",
},
}
for _, tc := range cases {
_, clusterCIDR, _ := net.ParseCIDR(tc.clusterCIDRStr)
a := newCIDRSet(clusterCIDR, tc.subnetMaskSize)
cidr := a.indexToCIDRBlock(tc.index)
if cidr.String() != tc.CIDRBlock {
t.Fatalf("error for %v index %d %s", tc.description, tc.index, cidr.String())
}
}
}
func TestCIDRSet_RandomishAllocation(t *testing.T) {
cases := []struct {
clusterCIDRStr string
description string
}{
{
clusterCIDRStr: "127.123.234.0/16",
description: "RandomishAllocation with IPv4",
},
{
clusterCIDRStr: "beef:1234::/16",
description: "RandomishAllocation with IPv6",
},
}
for _, tc := range cases {
_, clusterCIDR, _ := net.ParseCIDR(tc.clusterCIDRStr)
a := newCIDRSet(clusterCIDR, 24)
// allocate all the CIDRs
var cidrs []*net.IPNet
for i := 0; i < 256; i++ {
if c, err := a.allocateNext(); err == nil {
cidrs = append(cidrs, c)
} else {
t.Fatalf("unexpected error: %v for %v", err, tc.description)
}
}
var err error
_, err = a.allocateNext()
if err == nil {
t.Fatalf("expected error because of fully-allocated range for %v", tc.description)
}
// release them all
for i := 0; i < len(cidrs); i++ {
a.release(cidrs[i])
}
// allocate the CIDRs again
var rcidrs []*net.IPNet
for i := 0; i < 256; i++ {
if c, err := a.allocateNext(); err == nil {
rcidrs = append(rcidrs, c)
} else {
t.Fatalf("unexpected error: %d, %v for %v", i, err, tc.description)
}
}
_, err = a.allocateNext()
if err == nil {
t.Fatalf("expected error because of fully-allocated range for %v", tc.description)
}
if !reflect.DeepEqual(cidrs, rcidrs) {
t.Fatalf("expected re-allocated cidrs are the same collection for %v", tc.description)
}
}
}
func TestCIDRSet_AllocationOccupied(t *testing.T) {
cases := []struct {
clusterCIDRStr string
description string
}{
{
clusterCIDRStr: "127.123.234.0/16",
description: "AllocationOccupied with IPv4",
},
{
clusterCIDRStr: "beef:1234::/16",
description: "AllocationOccupied with IPv6",
},
}
for _, tc := range cases {
_, clusterCIDR, _ := net.ParseCIDR(tc.clusterCIDRStr)
a := newCIDRSet(clusterCIDR, 24)
// allocate all the CIDRs
var cidrs []*net.IPNet
var num_cidrs = 256
for i := 0; i < num_cidrs; i++ {
if c, err := a.allocateNext(); err == nil {
cidrs = append(cidrs, c)
} else {
t.Fatalf("unexpected error: %v for %v", err, tc.description)
}
}
var err error
_, err = a.allocateNext()
if err == nil {
t.Fatalf("expected error because of fully-allocated range for %v", tc.description)
}
// release them all
for i := 0; i < len(cidrs); i++ {
a.release(cidrs[i])
}
// occupy the last 128 CIDRs
for i := num_cidrs / 2; i < num_cidrs; i++ {
a.occupy(cidrs[i])
}
// allocate the first 128 CIDRs again
var rcidrs []*net.IPNet
for i := 0; i < num_cidrs/2; i++ {
if c, err := a.allocateNext(); err == nil {
rcidrs = append(rcidrs, c)
} else {
t.Fatalf("unexpected error: %d, %v for %v", i, err, tc.description)
}
}
_, err = a.allocateNext()
if err == nil {
t.Fatalf("expected error because of fully-allocated range for %v", tc.description)
}
// check Occupy() work properly
for i := num_cidrs / 2; i < num_cidrs; i++ {
rcidrs = append(rcidrs, cidrs[i])
}
if !reflect.DeepEqual(cidrs, rcidrs) {
t.Fatalf("expected re-allocated cidrs are the same collection for %v", tc.description)
}
}
}
func TestGetBitforCIDR(t *testing.T) {
cases := []struct {
clusterCIDRStr string
subNetMaskSize int
subNetCIDRStr string
expectedBit int
expectErr bool
description string
}{
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 16,
subNetCIDRStr: "127.0.0.0/16",
expectedBit: 0,
expectErr: false,
description: "Get 0 Bit with IPv4",
},
{
clusterCIDRStr: "be00::/8",
subNetMaskSize: 16,
subNetCIDRStr: "be00::/16",
expectedBit: 0,
expectErr: false,
description: "Get 0 Bit with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 16,
subNetCIDRStr: "127.123.0.0/16",
expectedBit: 123,
expectErr: false,
description: "Get 123rd Bit with IPv4",
},
{
clusterCIDRStr: "be00::/8",
subNetMaskSize: 16,
subNetCIDRStr: "beef::/16",
expectedBit: 0xef,
expectErr: false,
description: "Get xef Bit with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 16,
subNetCIDRStr: "127.168.0.0/16",
expectedBit: 168,
expectErr: false,
description: "Get 168th Bit with IPv4",
},
{
clusterCIDRStr: "be00::/8",
subNetMaskSize: 16,
subNetCIDRStr: "be68::/16",
expectedBit: 0x68,
expectErr: false,
description: "Get x68th Bit with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 16,
subNetCIDRStr: "127.224.0.0/16",
expectedBit: 224,
expectErr: false,
description: "Get 224th Bit with IPv4",
},
{
clusterCIDRStr: "be00::/8",
subNetMaskSize: 16,
subNetCIDRStr: "be24::/16",
expectedBit: 0x24,
expectErr: false,
description: "Get x24th Bit with IPv6",
},
{
clusterCIDRStr: "192.168.0.0/16",
subNetMaskSize: 24,
subNetCIDRStr: "192.168.12.0/24",
expectedBit: 12,
expectErr: false,
description: "Get 12th Bit with IPv4",
},
{
clusterCIDRStr: "beef::/16",
subNetMaskSize: 24,
subNetCIDRStr: "beef:1200::/24",
expectedBit: 0x12,
expectErr: false,
description: "Get x12th Bit with IPv6",
},
{
clusterCIDRStr: "192.168.0.0/16",
subNetMaskSize: 24,
subNetCIDRStr: "192.168.151.0/24",
expectedBit: 151,
expectErr: false,
description: "Get 151st Bit with IPv4",
},
{
clusterCIDRStr: "beef::/16",
subNetMaskSize: 24,
subNetCIDRStr: "beef:9700::/24",
expectedBit: 0x97,
expectErr: false,
description: "Get x97st Bit with IPv6",
},
{
clusterCIDRStr: "192.168.0.0/16",
subNetMaskSize: 24,
subNetCIDRStr: "127.168.224.0/24",
expectErr: true,
description: "Get error with IPv4",
},
{
clusterCIDRStr: "beef::/16",
subNetMaskSize: 24,
subNetCIDRStr: "2001:db00::/24",
expectErr: true,
description: "Get error with IPv6",
},
}
for _, tc := range cases {
_, clusterCIDR, err := net.ParseCIDR(tc.clusterCIDRStr)
if err != nil {
t.Fatalf("unexpected error: %v for %v", err, tc.description)
}
cs := newCIDRSet(clusterCIDR, tc.subNetMaskSize)
_, subnetCIDR, err := net.ParseCIDR(tc.subNetCIDRStr)
if err != nil {
t.Fatalf("unexpected error: %v for %v", err, tc.description)
}
got, err := cs.getIndexForCIDR(subnetCIDR)
if err == nil && tc.expectErr {
glog.Errorf("expected error but got null for %v", tc.description)
continue
}
if err != nil && !tc.expectErr {
glog.Errorf("unexpected error: %v for %v", err, tc.description)
continue
}
if got != tc.expectedBit {
glog.Errorf("expected %v, but got %v for %v", tc.expectedBit, got, tc.description)
}
}
}
func TestOccupy(t *testing.T) {
cases := []struct {
clusterCIDRStr string
subNetMaskSize int
subNetCIDRStr string
expectedUsedBegin int
expectedUsedEnd int
expectErr bool
description string
}{
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 16,
subNetCIDRStr: "127.0.0.0/8",
expectedUsedBegin: 0,
expectedUsedEnd: 255,
expectErr: false,
description: "Occupy all Bits with IPv4",
},
{
clusterCIDRStr: "2001:beef:1200::/40",
subNetMaskSize: 48,
subNetCIDRStr: "2001:beef:1200::/40",
expectedUsedBegin: 0,
expectedUsedEnd: 255,
expectErr: false,
description: "Occupy all Bits with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 16,
subNetCIDRStr: "127.0.0.0/2",
expectedUsedBegin: 0,
expectedUsedEnd: 255,
expectErr: false,
description: "Occupy every Bit with IPv4",
},
{
clusterCIDRStr: "2001:beef:1200::/40",
subNetMaskSize: 48,
subNetCIDRStr: "2001:beef:1234::/34",
expectedUsedBegin: 0,
expectedUsedEnd: 255,
expectErr: false,
description: "Occupy every Bit with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 16,
subNetCIDRStr: "127.0.0.0/16",
expectedUsedBegin: 0,
expectedUsedEnd: 0,
expectErr: false,
description: "Occupy 1st Bit with IPv4",
},
{
clusterCIDRStr: "2001:beef:1200::/40",
subNetMaskSize: 48,
subNetCIDRStr: "2001:beef:1200::/48",
expectedUsedBegin: 0,
expectedUsedEnd: 0,
expectErr: false,
description: "Occupy 1st Bit with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 32,
subNetCIDRStr: "127.0.0.0/16",
expectedUsedBegin: 0,
expectedUsedEnd: 65535,
expectErr: false,
description: "Occupy 65535 Bits with IPv4",
},
{
clusterCIDRStr: "2001:beef:1200::/48",
subNetMaskSize: 64,
subNetCIDRStr: "2001:beef:1200::/48",
expectedUsedBegin: 0,
expectedUsedEnd: 65535,
expectErr: false,
description: "Occupy 65535 Bits with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/7",
subNetMaskSize: 16,
subNetCIDRStr: "127.0.0.0/15",
expectedUsedBegin: 256,
expectedUsedEnd: 257,
expectErr: false,
description: "Occupy 257th Bit with IPv4",
},
{
clusterCIDRStr: "2001:beef:7f00::/39",
subNetMaskSize: 48,
subNetCIDRStr: "2001:beef:7f00::/47",
expectedUsedBegin: 256,
expectedUsedEnd: 257,
expectErr: false,
description: "Occupy 257th Bit with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/7",
subNetMaskSize: 15,
subNetCIDRStr: "127.0.0.0/15",
expectedUsedBegin: 128,
expectedUsedEnd: 128,
expectErr: false,
description: "Occupy 128th Bit with IPv4",
},
{
clusterCIDRStr: "2001:beef:7f00::/39",
subNetMaskSize: 47,
subNetCIDRStr: "2001:beef:7f00::/47",
expectedUsedBegin: 128,
expectedUsedEnd: 128,
expectErr: false,
description: "Occupy 128th Bit with IPv6",
},
{
clusterCIDRStr: "127.0.0.0/7",
subNetMaskSize: 18,
subNetCIDRStr: "127.0.0.0/15",
expectedUsedBegin: 1024,
expectedUsedEnd: 1031,
expectErr: false,
description: "Occupy 1031st Bit with IPv4",
},
{
clusterCIDRStr: "2001:beef:7f00::/39",
subNetMaskSize: 50,
subNetCIDRStr: "2001:beef:7f00::/47",
expectedUsedBegin: 1024,
expectedUsedEnd: 1031,
expectErr: false,
description: "Occupy 1031st Bit with IPv6",
},
}
for _, tc := range cases {
_, clusterCIDR, err := net.ParseCIDR(tc.clusterCIDRStr)
if err != nil {
t.Fatalf("unexpected error: %v for %v", err, tc.description)
}
cs := newCIDRSet(clusterCIDR, tc.subNetMaskSize)
_, subnetCIDR, err := net.ParseCIDR(tc.subNetCIDRStr)
if err != nil {
t.Fatalf("unexpected error: %v for %v", err, tc.description)
}
err = cs.occupy(subnetCIDR)
if err == nil && tc.expectErr {
t.Errorf("expected error but got none for %v", tc.description)
continue
}
if err != nil && !tc.expectErr {
t.Errorf("unexpected error: %v for %v", err, tc.description)
continue
}
expectedUsed := big.Int{}
for i := tc.expectedUsedBegin; i <= tc.expectedUsedEnd; i++ {
expectedUsed.SetBit(&expectedUsed, i, 1)
}
if expectedUsed.Cmp(&cs.used) != 0 {
t.Errorf("error for %v", tc.description)
}
}
}
func TestCIDRSetv6(t *testing.T) {
cases := []struct {
clusterCIDRStr string
subNetMaskSize int
expectedCIDR string
expectedCIDR2 string
expectErr bool
description string
}{
{
clusterCIDRStr: "127.0.0.0/8",
subNetMaskSize: 32,
expectErr: false,
expectedCIDR: "127.0.0.0/32",
expectedCIDR2: "127.0.0.1/32",
description: "Max cluster subnet size with IPv4",
},
{
clusterCIDRStr: "beef:1234::/32",
subNetMaskSize: 49,
expectErr: true,
description: "Max cluster subnet size with IPv6",
},
{
clusterCIDRStr: "beef:1234::/60",
subNetMaskSize: 65,
expectErr: true,
description: "Max prefix length with IPv6",
},
{
clusterCIDRStr: "2001:beef:1234:369b::/60",
subNetMaskSize: 64,
expectedCIDR: "2001:beef:1234:3690::/64",
expectedCIDR2: "2001:beef:1234:3691::/64",
expectErr: false,
description: "Allocate a few IPv6",
},
}
for _, tc := range cases {
_, clusterCIDR, _ := net.ParseCIDR(tc.clusterCIDRStr)
a := newCIDRSet(clusterCIDR, tc.subNetMaskSize)
p, err := a.allocateNext()
if err == nil && tc.expectErr {
t.Errorf("expected error but got none for %v", tc.description)
continue
}
if err != nil && !tc.expectErr {
t.Errorf("unexpected error: %v for %v", err, tc.description)
continue
}
if !tc.expectErr {
if p.String() != tc.expectedCIDR {
t.Fatalf("unexpected allocated cidr: %s for %v", p.String(), tc.description)
}
}
p2, err := a.allocateNext()
if !tc.expectErr {
if p2.String() != tc.expectedCIDR2 {
t.Fatalf("unexpected allocated cidr: %s for %v", p2.String(), tc.description)
}
}
}
}
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