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1f76a79bf7
- Handle contains sequence and identifier. This way datastore integration can be done at bitseq level. Signed-off-by: Alessandro Boch <aboch@docker.com>
543 lines
15 KiB
Go
543 lines
15 KiB
Go
package ipam
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import (
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"fmt"
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"net"
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"testing"
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"time"
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"github.com/docker/libnetwork/bitseq"
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)
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func getAllocator(subnet *net.IPNet) *Allocator {
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a := NewAllocator()
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a.AddSubnet("default", &SubnetInfo{Subnet: subnet})
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return a
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}
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func TestInt2IP2IntConversion(t *testing.T) {
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for i := 0; i < 256*256*256; i++ {
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var array [4]byte // new array at each cycle
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addIntToIP(array[:], i)
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j := ipToInt(array[:])
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if j != i {
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t.Fatalf("Failed to convert ordinal %d to IP % x and back to ordinal. Got %d", i, array, j)
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}
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}
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}
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func TestIsValid(t *testing.T) {
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list := []int{0, 255, 256, 511, 512, 767, 768}
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for _, i := range list {
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if isValidIP(i) {
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t.Fatalf("Failed to detect invalid IPv4 ordinal: %d", i)
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}
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}
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list = []int{1, 254, 257, 258, 510, 513, 769, 770}
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for _, i := range list {
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if !isValidIP(i) {
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t.Fatalf("Marked valid ipv4 as invalid: %d", i)
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}
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}
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}
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func TestGetAddressVersion(t *testing.T) {
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if v4 != getAddressVersion(net.ParseIP("172.28.30.112")) {
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t.Fatalf("Failed to detect IPv4 version")
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}
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if v4 != getAddressVersion(net.ParseIP("0.0.0.1")) {
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t.Fatalf("Failed to detect IPv4 version")
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}
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if v6 != getAddressVersion(net.ParseIP("ff01::1")) {
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t.Fatalf("Failed to detect IPv6 version")
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}
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if v6 != getAddressVersion(net.ParseIP("2001:56::76:51")) {
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t.Fatalf("Failed to detect IPv6 version")
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}
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}
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func TestAddSubnets(t *testing.T) {
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a := NewAllocator()
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_, sub0, _ := net.ParseCIDR("10.0.0.0/8")
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err := a.AddSubnet("default", &SubnetInfo{Subnet: sub0})
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if err != nil {
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t.Fatalf("Unexpected failure in adding subent")
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}
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err = a.AddSubnet("abc", &SubnetInfo{Subnet: sub0})
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if err != nil {
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t.Fatalf("Unexpected failure in adding overlapping subents to different address spaces")
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}
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err = a.AddSubnet("abc", &SubnetInfo{Subnet: sub0})
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if err == nil {
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t.Fatalf("Failed to detect overlapping subnets: %s and %s", sub0, sub0)
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}
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_, sub1, _ := net.ParseCIDR("10.20.2.0/24")
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err = a.AddSubnet("default", &SubnetInfo{Subnet: sub1})
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if err == nil {
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t.Fatalf("Failed to detect overlapping subnets: %s and %s", sub0, sub1)
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}
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_, sub2, _ := net.ParseCIDR("10.128.0.0/9")
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err = a.AddSubnet("default", &SubnetInfo{Subnet: sub2})
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if err == nil {
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t.Fatalf("Failed to detect overlapping subnets: %s and %s", sub1, sub2)
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}
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_, sub6, err := net.ParseCIDR("1003:1:2:3:4:5:6::/112")
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if err != nil {
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t.Fatalf("Wrong input, Can't proceed: %s", err.Error())
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}
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err = a.AddSubnet("default", &SubnetInfo{Subnet: sub6})
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if err != nil {
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t.Fatalf("Failed to add v6 subnet: %s", err.Error())
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}
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_, sub6, err = net.ParseCIDR("1003:1:2:3::/64")
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if err != nil {
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t.Fatalf("Wrong input, Can't proceed: %s", err.Error())
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}
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err = a.AddSubnet("default", &SubnetInfo{Subnet: sub6})
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if err == nil {
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t.Fatalf("Failed to detect overlapping v6 subnet")
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}
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}
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func TestAdjustAndCheckSubnet(t *testing.T) {
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_, sub6, _ := net.ParseCIDR("1003:1:2:300::/63")
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_, err := adjustAndCheckSubnetSize(sub6)
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if err == nil {
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t.Fatalf("Failed detect too big v6 subnet")
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}
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_, sub, _ := net.ParseCIDR("192.0.0.0/7")
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_, err = adjustAndCheckSubnetSize(sub)
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if err == nil {
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t.Fatalf("Failed detect too big v4 subnet")
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}
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subnet := "1004:1:2:6::/64"
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_, sub6, _ = net.ParseCIDR(subnet)
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subnetToSplit, err := adjustAndCheckSubnetSize(sub6)
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if err != nil {
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t.Fatalf("Unexpected error returned by adjustAndCheckSubnetSize()")
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}
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ones, _ := subnetToSplit.Mask.Size()
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if ones < minNetSizeV6Eff {
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t.Fatalf("Wrong effective network size for %s. Expected: %d. Got: %d", subnet, minNetSizeV6Eff, ones)
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}
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}
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func TestRemoveSubnet(t *testing.T) {
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a := NewAllocator()
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input := []struct {
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addrSpace AddressSpace
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subnet string
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}{
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{"default", "192.168.0.0/16"},
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{"default", "172.17.0.0/16"},
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{"default", "10.0.0.0/8"},
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{"default", "2002:1:2:3:4:5:ffff::/112"},
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{"splane", "172.17.0.0/16"},
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{"splane", "10.0.0.0/8"},
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{"splane", "2002:1:2:3:4:5:6::/112"},
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{"splane", "2002:1:2:3:4:5:ffff::/112"},
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}
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for _, i := range input {
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_, sub, err := net.ParseCIDR(i.subnet)
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if err != nil {
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t.Fatalf("Wrong input, Can't proceed: %s", err.Error())
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}
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err = a.AddSubnet(i.addrSpace, &SubnetInfo{Subnet: sub})
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if err != nil {
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t.Fatalf("Failed to apply input. Can't proceed: %s", err.Error())
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}
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}
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_, sub, _ := net.ParseCIDR("172.17.0.0/16")
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a.RemoveSubnet("default", sub)
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if len(a.subnetsInfo) != 7 {
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t.Fatalf("Failed to remove subnet info")
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}
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list := a.getSubnetList("default", v4)
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if len(list) != 257 {
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t.Fatalf("Failed to effectively remove subnet address space")
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}
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_, sub, _ = net.ParseCIDR("2002:1:2:3:4:5:ffff::/112")
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a.RemoveSubnet("default", sub)
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if len(a.subnetsInfo) != 6 {
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t.Fatalf("Failed to remove subnet info")
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}
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list = a.getSubnetList("default", v6)
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if len(list) != 0 {
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t.Fatalf("Failed to effectively remove subnet address space")
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}
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_, sub, _ = net.ParseCIDR("2002:1:2:3:4:5:6::/112")
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a.RemoveSubnet("splane", sub)
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if len(a.subnetsInfo) != 5 {
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t.Fatalf("Failed to remove subnet info")
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}
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list = a.getSubnetList("splane", v6)
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if len(list) != 1 {
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t.Fatalf("Failed to effectively remove subnet address space")
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}
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}
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func TestGetInternalSubnets(t *testing.T) {
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// This function tests the splitting of a parent subnet in small host subnets.
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// The splitting is controlled by the max host size, which is the first parameter
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// passed to the function. It basically says if the parent subnet host size is
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// greater than the max host size, split the parent subnet into N internal small
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// subnets with host size = max host size to cover the same address space.
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input := []struct {
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internalHostSize int
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parentSubnet string
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firstIntSubnet string
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lastIntSubnet string
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}{
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// Test 8 bits prefix network
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{24, "10.0.0.0/8", "10.0.0.0/8", "10.0.0.0/8"},
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{16, "10.0.0.0/8", "10.0.0.0/16", "10.255.0.0/16"},
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{8, "10.0.0.0/8", "10.0.0.0/24", "10.255.255.0/24"},
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// Test 16 bits prefix network
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{16, "192.168.0.0/16", "192.168.0.0/16", "192.168.0.0/16"},
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{8, "192.168.0.0/16", "192.168.0.0/24", "192.168.255.0/24"},
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// Test 24 bits prefix network
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{16, "192.168.57.0/24", "192.168.57.0/24", "192.168.57.0/24"},
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{8, "192.168.57.0/24", "192.168.57.0/24", "192.168.57.0/24"},
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// Test non byte multiple host size
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{24, "10.0.0.0/8", "10.0.0.0/8", "10.0.0.0/8"},
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{20, "10.0.0.0/12", "10.0.0.0/12", "10.0.0.0/12"},
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{20, "10.128.0.0/12", "10.128.0.0/12", "10.128.0.0/12"},
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{12, "10.16.0.0/16", "10.16.0.0/20", "10.16.240.0/20"},
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{13, "10.0.0.0/8", "10.0.0.0/19", "10.255.224.0/19"},
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{15, "10.0.0.0/8", "10.0.0.0/17", "10.255.128.0/17"},
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// Test v6 network
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{16, "2002:1:2:3:4:5:6000::/110", "2002:1:2:3:4:5:6000:0/112", "2002:1:2:3:4:5:6003:0/112"},
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{16, "2002:1:2:3:4:5:ff00::/104", "2002:1:2:3:4:5:ff00:0/112", "2002:1:2:3:4:5:ffff:0/112"},
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{12, "2002:1:2:3:4:5:ffff::/112", "2002:1:2:3:4:5:ffff:0/116", "2002:1:2:3:4:5:ffff:f000/116"},
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{11, "2002:1:2:3:4:5:ffff::/112", "2002:1:2:3:4:5:ffff:0/117", "2002:1:2:3:4:5:ffff:f800/117"},
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}
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for _, d := range input {
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assertInternalSubnet(t, d.internalHostSize, d.parentSubnet, d.firstIntSubnet, d.lastIntSubnet)
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}
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}
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func TestGetAddress(t *testing.T) {
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input := []string{
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/*"10.0.0.0/8", "10.0.0.0/9", */ "10.0.0.0/10", "10.0.0.0/11", "10.0.0.0/12", "10.0.0.0/13", "10.0.0.0/14",
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"10.0.0.0/15", "10.0.0.0/16", "10.0.0.0/17", "10.0.0.0/18", "10.0.0.0/19", "10.0.0.0/20", "10.0.0.0/21",
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"10.0.0.0/22", "10.0.0.0/23", "10.0.0.0/24", "10.0.0.0/25", "10.0.0.0/26", "10.0.0.0/27", "10.0.0.0/28",
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"10.0.0.0/29", "10.0.0.0/30", "10.0.0.0/31"}
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for _, subnet := range input {
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assertGetAddress(t, subnet)
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}
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}
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func TestGetSubnetList(t *testing.T) {
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a := NewAllocator()
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input := []struct {
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addrSpace AddressSpace
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subnet string
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}{
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{"default", "192.168.0.0/16"},
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{"default", "172.17.0.0/16"},
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{"default", "10.0.0.0/8"},
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{"default", "2002:1:2:3:4:5:6::/112"},
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{"default", "2002:1:2:3:4:5:ffff::/112"},
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{"splane", "172.17.0.0/16"},
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{"splane", "10.0.0.0/8"},
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{"splane", "2002:1:2:3:4:5:ff00::/104"},
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}
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for _, i := range input {
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_, sub, err := net.ParseCIDR(i.subnet)
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if err != nil {
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t.Fatalf("Wrong input, Can't proceed: %s", err.Error())
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}
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err = a.AddSubnet(i.addrSpace, &SubnetInfo{Subnet: sub})
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if err != nil {
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t.Fatalf("Failed to apply input. Can't proceed: %s", err.Error())
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}
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}
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list := a.getSubnetList("default", v4)
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if len(list) != 258 {
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t.Fatalf("Incorrect number of internal subnets for ipv4 version. Expected 258. Got %d.", len(list))
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}
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list = a.getSubnetList("splane", v4)
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if len(list) != 257 {
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t.Fatalf("Incorrect number of internal subnets for ipv4 version. Expected 257. Got %d.", len(list))
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}
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list = a.getSubnetList("default", v6)
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if len(list) != 2 {
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t.Fatalf("Incorrect number of internal subnets for ipv6 version. Expected 2. Got %d.", len(list))
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}
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list = a.getSubnetList("splane", v6)
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if len(list) != 256 {
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t.Fatalf("Incorrect number of internal subnets for ipv6 version. Expected 256. Got %d.", len(list))
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}
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}
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func TestRequestSyntaxCheck(t *testing.T) {
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var (
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a = NewAllocator()
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subnet = "192.168.0.0/16"
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addSpace = AddressSpace("green")
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)
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// Add subnet and create base request
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_, sub, _ := net.ParseCIDR(subnet)
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a.AddSubnet(addSpace, &SubnetInfo{Subnet: sub})
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req := &AddressRequest{Subnet: *sub}
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// Empty address space request
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_, err := a.Request("", req)
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if err == nil {
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t.Fatalf("Failed to detect wrong request: empty address space")
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}
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// Preferred address from different subnet in request
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req.Address = net.ParseIP("172.17.0.23")
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_, err = a.Request(addSpace, req)
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if err == nil {
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t.Fatalf("Failed to detect wrong request: preferred IP from different subnet")
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}
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// Preferred address specified and nil subnet
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req = &AddressRequest{Address: net.ParseIP("172.17.0.23")}
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_, err = a.Request(addSpace, req)
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if err == nil {
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t.Fatalf("Failed to detect wrong request: subnet not specified but preferred address specified")
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}
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}
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func TestRequest(t *testing.T) {
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// Request N addresses from different size subnets, verifying last request
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// returns expected address. Internal subnet host size is Allocator's default, 16
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input := []struct {
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subnet string
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numReq int
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lastIP string
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}{
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{"192.168.59.0/24", 254, "192.168.59.254"},
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{"192.168.240.0/20", 254, "192.168.240.254"},
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{"192.168.0.0/16", 254, "192.168.0.254"},
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{"10.16.0.0/16", 254, "10.16.0.254"},
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{"10.128.0.0/12", 254, "10.128.0.254"},
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{"10.0.0.0/8", 254, "10.0.0.254"},
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{"192.168.0.0/16", 256, "192.168.1.2"},
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{"10.0.0.0/8", 256, "10.0.1.2"},
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{"192.168.128.0/18", 4 * 254, "192.168.131.254"},
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{"192.168.240.0/20", 16 * 254, "192.168.255.254"},
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{"192.168.0.0/16", 256 * 254, "192.168.255.254"},
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{"10.0.0.0/8", 2 * 254, "10.0.1.254"},
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{"10.0.0.0/8", 5 * 254, "10.0.4.254"},
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//{"10.0.0.0/8", 100 * 256 * 254, "10.99.255.254"},
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}
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for _, d := range input {
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assertNRequests(t, d.subnet, d.numReq, d.lastIP)
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}
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}
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func TestRelease(t *testing.T) {
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var (
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err error
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req *AddressRequest
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subnet = "192.168.0.0/16"
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)
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_, sub, _ := net.ParseCIDR(subnet)
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a := getAllocator(sub)
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req = &AddressRequest{Subnet: *sub}
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bm := a.addresses[subnetKey{"default", subnet}]
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// Allocate all addresses
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for err != ErrNoAvailableIPs {
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_, err = a.Request("default", req)
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}
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toRelease := []struct {
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address string
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}{
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{"192.168.0.1"},
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{"192.168.0.2"},
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{"192.168.0.3"},
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{"192.168.0.4"},
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{"192.168.0.5"},
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{"192.168.0.6"},
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{"192.168.0.7"},
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{"192.168.0.8"},
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{"192.168.0.9"},
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{"192.168.0.10"},
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{"192.168.0.30"},
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{"192.168.0.31"},
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{"192.168.1.32"},
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{"192.168.0.254"},
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{"192.168.1.1"},
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{"192.168.1.2"},
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{"192.168.1.3"},
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{"192.168.255.253"},
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{"192.168.255.254"},
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}
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// One by one, relase the address and request again. We should get the same IP
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req = &AddressRequest{Subnet: *sub}
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for i, inp := range toRelease {
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address := net.ParseIP(inp.address)
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a.Release("default", address)
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if bm.freeAddresses != 1 {
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t.Fatalf("Failed to update free address count after release. Expected %d, Found: %d", i+1, bm.freeAddresses)
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}
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rsp, err := a.Request("default", req)
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if err != nil {
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t.Fatalf("Failed to obtain the address: %s", err.Error())
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}
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if !address.Equal(rsp.Address) {
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t.Fatalf("Failed to obtain the same address. Expected: %s, Got: %s", address, rsp.Address)
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}
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}
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}
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func assertInternalSubnet(t *testing.T, hostSize int, bigSubnet, firstSmall, lastSmall string) {
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_, subnet, _ := net.ParseCIDR(bigSubnet)
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list, _ := getInternalSubnets(subnet, hostSize)
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count := 1
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ones, bits := subnet.Mask.Size()
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diff := bits - ones - hostSize
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if diff > 0 {
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count <<= uint(diff)
|
|
}
|
|
|
|
if len(list) != count {
|
|
t.Fatalf("Wrong small subnets number. Expected: %d, Got: %d", count, len(list))
|
|
}
|
|
if firstSmall != list[0].String() {
|
|
t.Fatalf("Wrong first small subent. Expected: %v, Got: %v", firstSmall, list[0])
|
|
}
|
|
if lastSmall != list[count-1].String() {
|
|
t.Fatalf("Wrong last small subent. Expected: %v, Got: %v", lastSmall, list[count-1])
|
|
}
|
|
}
|
|
|
|
func assertGetAddress(t *testing.T, subnet string) {
|
|
var (
|
|
err error
|
|
printTime = false
|
|
a = &Allocator{}
|
|
)
|
|
|
|
_, sub, _ := net.ParseCIDR(subnet)
|
|
ones, bits := sub.Mask.Size()
|
|
zeroes := bits - ones
|
|
numAddresses := 1 << uint(zeroes)
|
|
|
|
var expectedMax uint32
|
|
if numAddresses >= 32 {
|
|
expectedMax = uint32(1<<32 - 1)
|
|
} else {
|
|
expectedMax = (1<<uint(numAddresses) - 1) << uint(32-numAddresses)
|
|
}
|
|
|
|
bm := &bitmask{
|
|
subnet: sub,
|
|
addressMask: bitseq.NewHandle("default/192.168.0.0/24", uint32(numAddresses)),
|
|
freeAddresses: numAddresses,
|
|
}
|
|
numBlocks := bm.addressMask.Head.Count
|
|
|
|
start := time.Now()
|
|
run := 0
|
|
for err != ErrNoAvailableIPs {
|
|
_, err = a.getAddress(bm, nil, v4)
|
|
run++
|
|
}
|
|
if printTime {
|
|
fmt.Printf("\nTaken %v, to allocate all addresses on %s. (nemAddresses: %d. Runs: %d)", time.Since(start), subnet, numAddresses, run)
|
|
}
|
|
if bm.addressMask.Head.Block != expectedMax || bm.addressMask.Head.Count != numBlocks {
|
|
t.Fatalf("Failed to effectively reserve all addresses on %s. Expected (0x%x, %d) as first sequence. Found (0x%x,%d)",
|
|
subnet, expectedMax, numBlocks, bm.addressMask.Head.Block, bm.addressMask.Head.Count)
|
|
}
|
|
}
|
|
|
|
func assertNRequests(t *testing.T, subnet string, numReq int, lastExpectedIP string) {
|
|
var (
|
|
err error
|
|
req *AddressRequest
|
|
rsp *AddressResponse
|
|
printTime = false
|
|
)
|
|
|
|
_, sub, _ := net.ParseCIDR(subnet)
|
|
lastIP := net.ParseIP(lastExpectedIP)
|
|
|
|
a := getAllocator(sub)
|
|
req = &AddressRequest{Subnet: *sub}
|
|
|
|
i := 0
|
|
start := time.Now()
|
|
for ; i < numReq; i++ {
|
|
rsp, err = a.Request("default", req)
|
|
}
|
|
if printTime {
|
|
fmt.Printf("\nTaken %v, to allocate %d addresses on %s\n", time.Since(start), numReq, subnet)
|
|
}
|
|
|
|
if !lastIP.Equal(rsp.Address) {
|
|
t.Fatalf("Wrong last IP. Expected %s. Got: %s (err: %v, ind: %d)", lastExpectedIP, rsp.Address.String(), err, i)
|
|
}
|
|
}
|
|
|
|
func benchmarkRequest(subnet *net.IPNet) {
|
|
var err error
|
|
|
|
a := NewAllocator()
|
|
a.internalHostSize = 20
|
|
a.AddSubnet("default", &SubnetInfo{Subnet: subnet})
|
|
|
|
req := &AddressRequest{Subnet: *subnet}
|
|
for err != ErrNoAvailableIPs {
|
|
_, err = a.Request("default", req)
|
|
|
|
}
|
|
}
|
|
|
|
func benchMarkRequest(subnet *net.IPNet, b *testing.B) {
|
|
for n := 0; n < b.N; n++ {
|
|
benchmarkRequest(subnet)
|
|
}
|
|
}
|
|
|
|
func BenchmarkRequest_24(b *testing.B) {
|
|
benchmarkRequest(&net.IPNet{IP: []byte{10, 0, 0, 0}, Mask: []byte{255, 255, 255, 0}})
|
|
}
|
|
|
|
func BenchmarkRequest_16(b *testing.B) {
|
|
benchmarkRequest(&net.IPNet{IP: []byte{10, 0, 0, 0}, Mask: []byte{255, 255, 0, 0}})
|
|
}
|
|
|
|
func BenchmarkRequest_8(b *testing.B) {
|
|
benchmarkRequest(&net.IPNet{IP: []byte{10, 0, 0, 0}, Mask: []byte{255, 0xfc, 0, 0}})
|
|
}
|