682 lines
15 KiB
Go
682 lines
15 KiB
Go
package ipallocator
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import (
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"fmt"
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"math/big"
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"net"
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"testing"
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)
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func reset() {
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allocatedIPs = networkSet{}
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}
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func TestConversion(t *testing.T) {
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ip := net.ParseIP("127.0.0.1")
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i := ipToBigInt(ip)
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if i.Cmp(big.NewInt(0x7f000001)) != 0 {
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t.Fatal("incorrect conversion")
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}
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conv := bigIntToIP(i)
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if !ip.Equal(conv) {
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t.Error(conv.String())
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}
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}
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func TestConversionIPv6(t *testing.T) {
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ip := net.ParseIP("2a00:1450::1")
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ip2 := net.ParseIP("2a00:1450::2")
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ip3 := net.ParseIP("2a00:1450::1:1")
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i := ipToBigInt(ip)
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val, success := big.NewInt(0).SetString("2a001450000000000000000000000001", 16)
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if !success {
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t.Fatal("Hex-String to BigInt conversion failed.")
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}
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if i.Cmp(val) != 0 {
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t.Fatal("incorrent conversion")
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}
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conv := bigIntToIP(i)
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conv2 := bigIntToIP(big.NewInt(0).Add(i, big.NewInt(1)))
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conv3 := bigIntToIP(big.NewInt(0).Add(i, big.NewInt(0x10000)))
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if !ip.Equal(conv) {
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t.Error("2a00:1450::1 should be equal to " + conv.String())
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}
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if !ip2.Equal(conv2) {
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t.Error("2a00:1450::2 should be equal to " + conv2.String())
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}
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if !ip3.Equal(conv3) {
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t.Error("2a00:1450::1:1 should be equal to " + conv3.String())
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}
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}
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func TestRequestNewIps(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{192, 168, 0, 1},
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Mask: []byte{255, 255, 255, 0},
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}
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var ip net.IP
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var err error
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for i := 1; i < 10; i++ {
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ip, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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if expected := fmt.Sprintf("192.168.0.%d", i); ip.String() != expected {
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t.Fatalf("Expected ip %s got %s", expected, ip.String())
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}
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}
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value := bigIntToIP(big.NewInt(0).Add(ipToBigInt(ip), big.NewInt(1))).String()
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if err := ReleaseIP(network, ip); err != nil {
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t.Fatal(err)
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}
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ip, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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if ip.String() != value {
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t.Fatalf("Expected to receive the next ip %s got %s", value, ip.String())
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}
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}
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func TestRequestNewIpV6(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{0x2a, 0x00, 0x14, 0x50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
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Mask: []byte{255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0}, // /64 netmask
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}
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var ip net.IP
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var err error
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for i := 1; i < 10; i++ {
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ip, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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if expected := fmt.Sprintf("2a00:1450::%d", i); ip.String() != expected {
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t.Fatalf("Expected ip %s got %s", expected, ip.String())
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}
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}
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value := bigIntToIP(big.NewInt(0).Add(ipToBigInt(ip), big.NewInt(1))).String()
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if err := ReleaseIP(network, ip); err != nil {
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t.Fatal(err)
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}
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ip, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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if ip.String() != value {
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t.Fatalf("Expected to receive the next ip %s got %s", value, ip.String())
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}
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}
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func TestReleaseIp(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{192, 168, 0, 1},
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Mask: []byte{255, 255, 255, 0},
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}
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ip, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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if err := ReleaseIP(network, ip); err != nil {
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t.Fatal(err)
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}
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}
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func TestReleaseIpV6(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{0x2a, 0x00, 0x14, 0x50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
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Mask: []byte{255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0}, // /64 netmask
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}
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ip, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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if err := ReleaseIP(network, ip); err != nil {
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t.Fatal(err)
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}
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}
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func TestGetReleasedIp(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{192, 168, 0, 1},
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Mask: []byte{255, 255, 255, 0},
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}
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ip, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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value := ip.String()
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if err := ReleaseIP(network, ip); err != nil {
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t.Fatal(err)
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}
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for i := 0; i < 253; i++ {
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_, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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err = ReleaseIP(network, ip)
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if err != nil {
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t.Fatal(err)
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}
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}
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ip, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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if ip.String() != value {
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t.Fatalf("Expected to receive same ip %s got %s", value, ip.String())
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}
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}
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func TestGetReleasedIpV6(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{0x2a, 0x00, 0x14, 0x50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
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Mask: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0},
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}
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ip, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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value := ip.String()
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if err := ReleaseIP(network, ip); err != nil {
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t.Fatal(err)
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}
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for i := 0; i < 253; i++ {
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_, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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err = ReleaseIP(network, ip)
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if err != nil {
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t.Fatal(err)
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}
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}
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ip, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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if ip.String() != value {
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t.Fatalf("Expected to receive same ip %s got %s", value, ip.String())
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}
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}
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func TestRequestSpecificIp(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{192, 168, 0, 1},
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Mask: []byte{255, 255, 255, 224},
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}
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ip := net.ParseIP("192.168.0.5")
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// Request a "good" IP.
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if _, err := RequestIP(network, ip); err != nil {
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t.Fatal(err)
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}
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// Request the same IP again.
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if _, err := RequestIP(network, ip); err != ErrIPAlreadyAllocated {
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t.Fatalf("Got the same IP twice: %#v", err)
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}
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// Request an out of range IP.
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if _, err := RequestIP(network, net.ParseIP("192.168.0.42")); err != ErrIPOutOfRange {
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t.Fatalf("Got an out of range IP: %#v", err)
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}
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}
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func TestRequestSpecificIpV6(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{0x2a, 0x00, 0x14, 0x50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
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Mask: []byte{255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0}, // /64 netmask
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}
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ip := net.ParseIP("2a00:1450::5")
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// Request a "good" IP.
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if _, err := RequestIP(network, ip); err != nil {
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t.Fatal(err)
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}
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// Request the same IP again.
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if _, err := RequestIP(network, ip); err != ErrIPAlreadyAllocated {
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t.Fatalf("Got the same IP twice: %#v", err)
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}
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// Request an out of range IP.
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if _, err := RequestIP(network, net.ParseIP("2a00:1500::1")); err != ErrIPOutOfRange {
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t.Fatalf("Got an out of range IP: %#v", err)
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}
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}
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func TestIPAllocator(t *testing.T) {
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expectedIPs := []net.IP{
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0: net.IPv4(127, 0, 0, 1),
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1: net.IPv4(127, 0, 0, 2),
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2: net.IPv4(127, 0, 0, 3),
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3: net.IPv4(127, 0, 0, 4),
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4: net.IPv4(127, 0, 0, 5),
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5: net.IPv4(127, 0, 0, 6),
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}
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gwIP, n, _ := net.ParseCIDR("127.0.0.1/29")
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network := &net.IPNet{IP: gwIP, Mask: n.Mask}
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// Pool after initialisation (f = free, u = used)
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// 1(f) - 2(f) - 3(f) - 4(f) - 5(f) - 6(f)
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// ↑
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// Check that we get 6 IPs, from 127.0.0.1–127.0.0.6, in that
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// order.
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for i := 0; i < 6; i++ {
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ip, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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assertIPEquals(t, expectedIPs[i], ip)
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}
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// Before loop begin
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// 1(f) - 2(f) - 3(f) - 4(f) - 5(f) - 6(f)
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// ↑
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// After i = 0
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// 1(u) - 2(f) - 3(f) - 4(f) - 5(f) - 6(f)
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// ↑
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// After i = 1
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// 1(u) - 2(u) - 3(f) - 4(f) - 5(f) - 6(f)
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// ↑
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// After i = 2
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// 1(u) - 2(u) - 3(u) - 4(f) - 5(f) - 6(f)
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// ↑
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// After i = 3
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// 1(u) - 2(u) - 3(u) - 4(u) - 5(f) - 6(f)
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// ↑
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// After i = 4
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// 1(u) - 2(u) - 3(u) - 4(u) - 5(u) - 6(f)
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// ↑
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// After i = 5
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// 1(u) - 2(u) - 3(u) - 4(u) - 5(u) - 6(u)
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// ↑
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// Check that there are no more IPs
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ip, err := RequestIP(network, nil)
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if err == nil {
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t.Fatalf("There shouldn't be any IP addresses at this point, got %s\n", ip)
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}
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// Release some IPs in non-sequential order
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if err := ReleaseIP(network, expectedIPs[3]); err != nil {
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t.Fatal(err)
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}
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// 1(u) - 2(u) - 3(u) - 4(f) - 5(u) - 6(u)
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// ↑
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if err := ReleaseIP(network, expectedIPs[2]); err != nil {
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t.Fatal(err)
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}
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// 1(u) - 2(u) - 3(f) - 4(f) - 5(u) - 6(u)
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// ↑
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if err := ReleaseIP(network, expectedIPs[4]); err != nil {
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t.Fatal(err)
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}
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// 1(u) - 2(u) - 3(f) - 4(f) - 5(f) - 6(u)
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// ↑
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// Make sure that IPs are reused in sequential order, starting
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// with the first released IP
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newIPs := make([]net.IP, 3)
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for i := 0; i < 3; i++ {
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ip, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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newIPs[i] = ip
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}
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assertIPEquals(t, expectedIPs[2], newIPs[0])
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assertIPEquals(t, expectedIPs[3], newIPs[1])
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assertIPEquals(t, expectedIPs[4], newIPs[2])
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_, err = RequestIP(network, nil)
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if err == nil {
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t.Fatal("There shouldn't be any IP addresses at this point")
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}
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}
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func TestAllocateFirstIP(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{192, 168, 0, 0},
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Mask: []byte{255, 255, 255, 0},
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}
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firstIP := network.IP.To4().Mask(network.Mask)
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first := big.NewInt(0).Add(ipToBigInt(firstIP), big.NewInt(1))
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ip, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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allocated := ipToBigInt(ip)
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if allocated == first {
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t.Fatalf("allocated ip should not equal first ip: %d == %d", first, allocated)
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}
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}
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func TestAllocateAllIps(t *testing.T) {
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defer reset()
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network := &net.IPNet{
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IP: []byte{192, 168, 0, 1},
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Mask: []byte{255, 255, 255, 0},
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}
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var (
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current, first net.IP
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err error
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isFirst = true
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)
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for err == nil {
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current, err = RequestIP(network, nil)
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if isFirst {
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first = current
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isFirst = false
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}
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}
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if err != ErrNoAvailableIPs {
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t.Fatal(err)
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}
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if _, err := RequestIP(network, nil); err != ErrNoAvailableIPs {
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t.Fatal(err)
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}
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if err := ReleaseIP(network, first); err != nil {
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t.Fatal(err)
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}
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again, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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assertIPEquals(t, first, again)
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// ensure that alloc.last == alloc.begin won't result in dead loop
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if _, err := RequestIP(network, nil); err != ErrNoAvailableIPs {
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t.Fatal(err)
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}
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// Test by making alloc.last the only free ip and ensure we get it back
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// #1. first of the range, (alloc.last == ipToInt(first) already)
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if err := ReleaseIP(network, first); err != nil {
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t.Fatal(err)
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}
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ret, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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assertIPEquals(t, first, ret)
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// #2. last of the range, note that current is the last one
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last := net.IPv4(192, 168, 0, 254)
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setLastTo(t, network, last)
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ret, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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assertIPEquals(t, last, ret)
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// #3. middle of the range
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mid := net.IPv4(192, 168, 0, 7)
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setLastTo(t, network, mid)
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ret, err = RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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assertIPEquals(t, mid, ret)
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}
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// make sure the pool is full when calling setLastTo.
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// we don't cheat here
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func setLastTo(t *testing.T, network *net.IPNet, ip net.IP) {
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if err := ReleaseIP(network, ip); err != nil {
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t.Fatal(err)
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}
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ret, err := RequestIP(network, nil)
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if err != nil {
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t.Fatal(err)
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}
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assertIPEquals(t, ip, ret)
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if err := ReleaseIP(network, ip); err != nil {
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t.Fatal(err)
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}
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}
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func TestAllocateDifferentSubnets(t *testing.T) {
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defer reset()
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network1 := &net.IPNet{
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IP: []byte{192, 168, 0, 1},
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Mask: []byte{255, 255, 255, 0},
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}
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network2 := &net.IPNet{
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IP: []byte{127, 0, 0, 1},
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Mask: []byte{255, 255, 255, 0},
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}
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network3 := &net.IPNet{
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IP: []byte{0x2a, 0x00, 0x14, 0x50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
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Mask: []byte{255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0}, // /64 netmask
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}
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network4 := &net.IPNet{
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IP: []byte{0x2a, 0x00, 0x16, 0x32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
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Mask: []byte{255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0}, // /64 netmask
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}
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expectedIPs := []net.IP{
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||
0: net.IPv4(192, 168, 0, 1),
|
||
1: net.IPv4(192, 168, 0, 2),
|
||
2: net.IPv4(127, 0, 0, 1),
|
||
3: net.IPv4(127, 0, 0, 2),
|
||
4: net.ParseIP("2a00:1450::1"),
|
||
5: net.ParseIP("2a00:1450::2"),
|
||
6: net.ParseIP("2a00:1450::3"),
|
||
7: net.ParseIP("2a00:1632::1"),
|
||
8: net.ParseIP("2a00:1632::2"),
|
||
}
|
||
|
||
ip11, err := RequestIP(network1, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
ip12, err := RequestIP(network1, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
ip21, err := RequestIP(network2, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
ip22, err := RequestIP(network2, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
ip31, err := RequestIP(network3, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
ip32, err := RequestIP(network3, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
ip33, err := RequestIP(network3, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
ip41, err := RequestIP(network4, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
ip42, err := RequestIP(network4, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
assertIPEquals(t, expectedIPs[0], ip11)
|
||
assertIPEquals(t, expectedIPs[1], ip12)
|
||
assertIPEquals(t, expectedIPs[2], ip21)
|
||
assertIPEquals(t, expectedIPs[3], ip22)
|
||
assertIPEquals(t, expectedIPs[4], ip31)
|
||
assertIPEquals(t, expectedIPs[5], ip32)
|
||
assertIPEquals(t, expectedIPs[6], ip33)
|
||
assertIPEquals(t, expectedIPs[7], ip41)
|
||
assertIPEquals(t, expectedIPs[8], ip42)
|
||
}
|
||
|
||
func TestRegisterBadTwice(t *testing.T) {
|
||
defer reset()
|
||
network := &net.IPNet{
|
||
IP: []byte{192, 168, 1, 1},
|
||
Mask: []byte{255, 255, 255, 0},
|
||
}
|
||
subnet := &net.IPNet{
|
||
IP: []byte{192, 168, 1, 8},
|
||
Mask: []byte{255, 255, 255, 248},
|
||
}
|
||
|
||
if err := RegisterSubnet(network, subnet); err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
subnet = &net.IPNet{
|
||
IP: []byte{192, 168, 1, 16},
|
||
Mask: []byte{255, 255, 255, 248},
|
||
}
|
||
if err := RegisterSubnet(network, subnet); err != ErrNetworkAlreadyRegistered {
|
||
t.Fatalf("Expecteded ErrNetworkAlreadyRegistered error, got %v", err)
|
||
}
|
||
}
|
||
|
||
func TestRegisterBadRange(t *testing.T) {
|
||
defer reset()
|
||
network := &net.IPNet{
|
||
IP: []byte{192, 168, 1, 1},
|
||
Mask: []byte{255, 255, 255, 0},
|
||
}
|
||
subnet := &net.IPNet{
|
||
IP: []byte{192, 168, 1, 1},
|
||
Mask: []byte{255, 255, 0, 0},
|
||
}
|
||
if err := RegisterSubnet(network, subnet); err != ErrBadSubnet {
|
||
t.Fatalf("Expected ErrBadSubnet error, got %v", err)
|
||
}
|
||
}
|
||
|
||
func TestAllocateFromRange(t *testing.T) {
|
||
defer reset()
|
||
network := &net.IPNet{
|
||
IP: []byte{192, 168, 0, 1},
|
||
Mask: []byte{255, 255, 255, 0},
|
||
}
|
||
// 192.168.1.9 - 192.168.1.14
|
||
subnet := &net.IPNet{
|
||
IP: []byte{192, 168, 0, 8},
|
||
Mask: []byte{255, 255, 255, 248},
|
||
}
|
||
|
||
if err := RegisterSubnet(network, subnet); err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
expectedIPs := []net.IP{
|
||
0: net.IPv4(192, 168, 0, 9),
|
||
1: net.IPv4(192, 168, 0, 10),
|
||
2: net.IPv4(192, 168, 0, 11),
|
||
3: net.IPv4(192, 168, 0, 12),
|
||
4: net.IPv4(192, 168, 0, 13),
|
||
5: net.IPv4(192, 168, 0, 14),
|
||
}
|
||
for _, ip := range expectedIPs {
|
||
rip, err := RequestIP(network, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
assertIPEquals(t, ip, rip)
|
||
}
|
||
|
||
if _, err := RequestIP(network, nil); err != ErrNoAvailableIPs {
|
||
t.Fatalf("Expected ErrNoAvailableIPs error, got %v", err)
|
||
}
|
||
for _, ip := range expectedIPs {
|
||
ReleaseIP(network, ip)
|
||
rip, err := RequestIP(network, nil)
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
assertIPEquals(t, ip, rip)
|
||
}
|
||
}
|
||
|
||
func assertIPEquals(t *testing.T, ip1, ip2 net.IP) {
|
||
if !ip1.Equal(ip2) {
|
||
t.Fatalf("Expected IP %s, got %s", ip1, ip2)
|
||
}
|
||
}
|
||
|
||
func BenchmarkRequestIP(b *testing.B) {
|
||
network := &net.IPNet{
|
||
IP: []byte{192, 168, 0, 1},
|
||
Mask: []byte{255, 255, 255, 0},
|
||
}
|
||
b.ResetTimer()
|
||
for i := 0; i < b.N; i++ {
|
||
for j := 0; j < 253; j++ {
|
||
_, err := RequestIP(network, nil)
|
||
if err != nil {
|
||
b.Fatal(err)
|
||
}
|
||
}
|
||
reset()
|
||
}
|
||
}
|