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prefix_test.go
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prefix_test.go
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package ipam
import (
"reflect"
"strings"
"testing"
"github.com/pkg/errors"
"github.com/stretchr/testify/require"
"inet.af/netaddr"
)
func mustIP(s string) netaddr.IP {
ip, err := netaddr.ParseIP(s)
if err != nil {
panic(err)
}
return ip
}
// getHostAddresses will return all possible ipadresses a host can get in the given prefix.
// The IPs will be acquired by this method, so that the prefix has no free IPs afterwards.
func (i *ipamer) getHostAddresses(prefix string) ([]string, error) {
hostAddresses := []string{}
p, err := i.NewPrefix(prefix)
if err != nil {
return hostAddresses, err
}
// loop till AcquireIP signals that it has no ips left
for {
ip, err := i.AcquireIP(p.Cidr)
if errors.Is(err, ErrNoIPAvailable) {
return hostAddresses, nil
}
if err != nil {
return nil, err
}
hostAddresses = append(hostAddresses, ip.IP.String())
}
}
func TestIpamer_AcquireIP(t *testing.T) {
type fields struct {
prefixCIDR string
existingips []string
}
tests := []struct {
name string
fields fields
want *IP
}{
{
name: "Acquire next IP regularly",
fields: fields{
prefixCIDR: "192.168.1.0/24",
existingips: []string{},
},
want: &IP{IP: mustIP("192.168.1.1"), ParentPrefix: "192.168.1.0/24"},
},
{
name: "Acquire next IPv6 regularly",
fields: fields{
prefixCIDR: "2001:0db8:85a3::/124",
existingips: []string{},
},
want: &IP{IP: mustIP("2001:0db8:85a3::1"), ParentPrefix: "2001:0db8:85a3::/124"},
},
{
name: "Want next IP, network already occupied a little",
fields: fields{
prefixCIDR: "192.168.2.0/30",
existingips: []string{"192.168.2.1"},
},
want: &IP{IP: mustIP("192.168.2.2"), ParentPrefix: "192.168.2.0/30"},
},
{
name: "Want next IPv6, network already occupied a little",
fields: fields{
prefixCIDR: "2001:0db8:85a3::/124",
existingips: []string{"2001:db8:85a3::1"},
},
want: &IP{IP: mustIP("2001:db8:85a3::2"), ParentPrefix: "2001:0db8:85a3::/124"},
},
{
name: "Want next IP, but network is full",
fields: fields{
prefixCIDR: "192.168.3.0/30",
existingips: []string{"192.168.3.1", "192.168.3.2"},
},
want: nil,
},
{
name: "Want next IP, but network is full",
fields: fields{
prefixCIDR: "192.168.4.0/32",
},
want: nil,
},
{
name: "Want next IPv6, but network is full",
fields: fields{
prefixCIDR: "2001:0db8:85a3::/126",
existingips: []string{"2001:db8:85a3::1", "2001:db8:85a3::2", "2001:db8:85a3::3"},
},
want: nil,
},
{
name: "Want next IPv6, but network is full",
fields: fields{
prefixCIDR: "2001:0db8:85a3::/128",
},
want: nil,
},
}
for _, tt := range tests {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
p, err := ipam.NewPrefix(tt.fields.prefixCIDR)
if err != nil {
t.Errorf("Could not create prefix: %v", err)
}
for _, ipString := range tt.fields.existingips {
p.ips[ipString] = true
}
var updatedPrefix Prefix
updatedPrefix, err = ipam.storage.UpdatePrefix(*p)
if err != nil {
t.Errorf("Could not update prefix: %v", err)
}
got, _ := ipam.AcquireIP(updatedPrefix.Cidr)
if tt.want == nil || got == nil {
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("Ipamer.AcquireIP() want or got is nil, got %v, want %v", got, tt.want)
}
} else {
if tt.want.IP.Compare(got.IP) != 0 {
t.Errorf("Ipamer.AcquireIP() got %v, want %v", got, tt.want)
}
}
})
}
}
func TestIpamer_ReleaseIPFromPrefixIPv4(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix, err := ipam.NewPrefix("192.168.0.0/24")
require.Nil(t, err)
require.NotNil(t, prefix)
err = ipam.ReleaseIPFromPrefix(prefix.Cidr, "1.2.3.4")
require.NotNil(t, err)
require.True(t, errors.As(err, &NotFoundError{}), "error must be of correct type")
require.True(t, errors.Is(err, ErrNotFound), "error must be NotFound")
require.Equal(t, "NotFound: unable to release ip:1.2.3.4 because it is not allocated in prefix:192.168.0.0/24", err.Error())
err = ipam.ReleaseIPFromPrefix("4.5.6.7/23", "1.2.3.4")
require.NotNil(t, err)
require.True(t, errors.As(err, &NotFoundError{}), "error must be of correct type")
require.True(t, errors.Is(err, ErrNotFound), "error must be NotFound")
require.Equal(t, "NotFound: unable to find prefix for cidr:4.5.6.7/23", err.Error())
})
}
func TestIpamer_ReleaseIPFromPrefixIPv6(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix, err := ipam.NewPrefix("2001:0db8:85a3::/120")
require.Nil(t, err)
require.NotNil(t, prefix)
err = ipam.ReleaseIPFromPrefix(prefix.Cidr, "1.2.3.4")
require.NotNil(t, err)
require.True(t, errors.As(err, &NotFoundError{}), "error must be of correct type")
require.True(t, errors.Is(err, ErrNotFound), "error must be NotFound")
require.Equal(t, "NotFound: unable to release ip:1.2.3.4 because it is not allocated in prefix:2001:0db8:85a3::/120", err.Error())
err = ipam.ReleaseIPFromPrefix(prefix.Cidr, "1001:0db8:85a3::1")
require.NotNil(t, err)
require.True(t, errors.As(err, &NotFoundError{}), "error must be of correct type")
require.True(t, errors.Is(err, ErrNotFound), "error must be NotFound")
require.Equal(t, "NotFound: unable to release ip:1001:0db8:85a3::1 because it is not allocated in prefix:2001:0db8:85a3::/120", err.Error())
err = ipam.ReleaseIPFromPrefix("1001:0db8:85a3::/120", "1.2.3.4")
require.NotNil(t, err)
require.True(t, errors.As(err, &NotFoundError{}), "error must be of correct type")
require.True(t, errors.Is(err, ErrNotFound), "error must be NotFound")
require.Equal(t, "NotFound: unable to find prefix for cidr:1001:0db8:85a3::/120", err.Error())
})
}
func TestIpamer_AcquireSpecificIP(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
// IPv4
prefix, err := ipam.NewPrefix("192.168.99.0/24")
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
// network an broadcast are blocked
require.Equal(t, prefix.acquiredips(), uint64(2))
ip1, err := ipam.AcquireSpecificIP(prefix.Cidr, "192.168.99.1")
require.Nil(t, err)
require.NotNil(t, ip1)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(3))
ip2, err := ipam.AcquireSpecificIP(prefix.Cidr, "192.168.99.2")
require.Nil(t, err)
require.NotEqual(t, ip1, ip2)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(4))
require.Equal(t, "192.168.99.1", ip1.IP.String())
require.Equal(t, "192.168.99.2", ip2.IP.String())
// Wish IP out of prefix
ip3, err := ipam.AcquireSpecificIP(prefix.Cidr, "192.168.98.2")
require.Nil(t, ip3)
require.NotNil(t, err)
require.Equal(t, "given ip:192.168.98.2 is not in 192.168.99.0/24", err.Error())
// Wish IP is invalid
ip4, err := ipam.AcquireSpecificIP(prefix.Cidr, "192.168.99.1.invalid")
require.Nil(t, ip4)
require.NotNil(t, err)
require.Equal(t, "given ip:192.168.99.1.invalid in not valid", err.Error())
// Cidr is invalid
ip5, err := ipam.AcquireSpecificIP("3.4.5.6/27", "192.168.99.1.invalid")
require.Nil(t, ip5)
require.NotNil(t, err)
require.True(t, errors.As(err, &NotFoundError{}), "error must be of correct type")
require.True(t, errors.Is(err, ErrNotFound), "error must be NotFound")
require.Equal(t, "NotFound: unable to find prefix for cidr:3.4.5.6/27", err.Error())
prefix, err = ipam.ReleaseIP(ip1)
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(3))
prefix, err = ipam.ReleaseIP(ip2)
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(2))
// IPv6
prefix, err = ipam.NewPrefix("2001:0db8:85a3::/120")
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
// network is blocked
require.Equal(t, prefix.acquiredips(), uint64(1))
ip1, err = ipam.AcquireSpecificIP(prefix.Cidr, "2001:db8:85a3::1")
require.Nil(t, err)
require.NotNil(t, ip1)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(2))
ip2, err = ipam.AcquireSpecificIP(prefix.Cidr, "2001:0db8:85a3::2")
require.Nil(t, err)
require.NotEqual(t, ip1, ip2)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(3))
require.Equal(t, "2001:db8:85a3::1", ip1.IP.String())
require.Equal(t, "2001:db8:85a3::2", ip2.IP.String())
// Wish IP out of prefix
ip3, err = ipam.AcquireSpecificIP(prefix.Cidr, "2001:0db8:85a4::1")
require.Nil(t, ip3)
require.NotNil(t, err)
require.Equal(t, "given ip:2001:0db8:85a4::1 is not in 2001:0db8:85a3::/120", err.Error())
// Cidr is invalid
ip5, err = ipam.AcquireSpecificIP("2001:0db8:95a3::/120", "2001:0db8:95a3::invalid")
require.Nil(t, ip5)
require.NotNil(t, err)
require.True(t, errors.As(err, &NotFoundError{}), "error must be of correct type")
require.True(t, errors.Is(err, ErrNotFound), "error must be NotFound")
require.Equal(t, "NotFound: unable to find prefix for cidr:2001:0db8:95a3::/120", err.Error())
prefix, err = ipam.ReleaseIP(ip1)
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(2))
prefix, err = ipam.ReleaseIP(ip2)
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(1))
})
}
func TestIpamer_AcquireIPCountsIPv4(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix, err := ipam.NewPrefix("192.168.0.0/24")
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
// network an broadcast are blocked
require.Equal(t, prefix.acquiredips(), uint64(2))
ip1, err := ipam.AcquireIP(prefix.Cidr)
require.Nil(t, err)
require.NotNil(t, ip1)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(3))
ip2, err := ipam.AcquireIP(prefix.Cidr)
require.Nil(t, err)
require.NotEqual(t, ip1, ip2)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(4))
require.True(t, strings.HasPrefix(ip1.IP.String(), "192.168.0"))
require.True(t, strings.HasPrefix(ip2.IP.String(), "192.168.0"))
prefix, err = ipam.ReleaseIP(ip1)
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(3))
prefix, err = ipam.ReleaseIP(ip2)
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(2))
})
}
func TestIpamer_AcquireIPCountsIPv6(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix, err := ipam.NewPrefix("2001:0db8:85a3::/120")
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
// network is blocked
require.Equal(t, prefix.acquiredips(), uint64(1))
ip1, err := ipam.AcquireIP(prefix.Cidr)
require.Nil(t, err)
require.NotNil(t, ip1)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(2))
ip2, err := ipam.AcquireIP(prefix.Cidr)
require.Nil(t, err)
require.NotEqual(t, ip1, ip2)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(3))
require.True(t, strings.HasPrefix(ip1.IP.String(), "2001:db8:85a3::"))
require.True(t, strings.HasPrefix(ip2.IP.String(), "2001:db8:85a3::"))
prefix, err = ipam.ReleaseIP(ip1)
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(2))
prefix, err = ipam.ReleaseIP(ip2)
require.Nil(t, err)
require.Equal(t, prefix.availableips(), uint64(256))
require.Equal(t, prefix.acquiredips(), uint64(1))
})
}
func TestIpamer_AcquireChildPrefixFragmented(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
allPrefixes, err := ipam.storage.ReadAllPrefixes()
require.NoError(t, err)
require.Equal(t, 0, len(allPrefixes))
// Create Prefix with /20
prefix, err := ipam.NewPrefix("192.168.0.0/20")
require.NoError(t, err)
s, _ := prefix.availablePrefixes()
require.Equal(t, 1024, int(s))
require.Equal(t, 0, int(prefix.acquiredPrefixes()))
require.Equal(t, 0, int(prefix.Usage().AcquiredPrefixes))
// Acquire first half 192.168.0.0/21 = 192.168.0.0 - 192.168.7.254
c1, err := ipam.AcquireChildPrefix(prefix.Cidr, 21)
require.NoError(t, err)
require.NotNil(t, c1)
prefix = ipam.PrefixFrom(prefix.Cidr)
s, _ = prefix.availablePrefixes()
require.Equal(t, 512, int(s))
require.Equal(t, 1, int(prefix.acquiredPrefixes()))
require.Equal(t, 1, int(prefix.Usage().AcquiredPrefixes))
// acquire 1/4the of the rest 192.168.8.0/22 = 192.168.8.0 - 192.168.11.254
c2, err := ipam.AcquireChildPrefix(prefix.Cidr, 22)
require.NoError(t, err)
require.NotNil(t, c2)
prefix = ipam.PrefixFrom(prefix.Cidr)
s, a := prefix.availablePrefixes()
// Next free must be 192.168.12.0/22
require.Equal(t, []string{"192.168.12.0/22"}, a)
require.Equal(t, 256, int(s))
require.Equal(t, 2, int(prefix.acquiredPrefixes()))
require.Equal(t, 2, int(prefix.Usage().AcquiredPrefixes))
// acquire impossible size
_, err = ipam.AcquireChildPrefix(prefix.Cidr, 21)
require.EqualError(t, err, "no prefix found in 192.168.0.0/20 with length:21, but 192.168.12.0/22 is available")
// Release small, first half acquired
err = ipam.ReleaseChildPrefix(c2)
require.NoError(t, err)
// acquire /28
c3, err := ipam.AcquireChildPrefix(prefix.Cidr, 28)
require.NoError(t, err)
require.NotNil(t, c3)
prefix = ipam.PrefixFrom(prefix.Cidr)
s, a = prefix.availablePrefixes()
require.Equal(t, []string{"192.168.8.16/28", "192.168.8.32/27", "192.168.8.64/26", "192.168.8.128/25", "192.168.9.0/24", "192.168.10.0/23", "192.168.12.0/22"}, a)
require.Equal(t, 508, int(s))
require.Equal(t, 2, int(prefix.acquiredPrefixes()))
require.Equal(t, 2, int(prefix.Usage().AcquiredPrefixes))
// acquire impossible size
_, err = ipam.AcquireChildPrefix(prefix.Cidr, 21)
require.EqualError(t, err, "no prefix found in 192.168.0.0/20 with length:21, but 192.168.8.16/28,192.168.8.32/27,192.168.8.64/26,192.168.8.128/25,192.168.9.0/24,192.168.10.0/23,192.168.12.0/22 are available")
// acquire a /22 which must be possible
c4, err := ipam.AcquireChildPrefix(prefix.Cidr, 22)
require.NoError(t, err)
require.NotNil(t, c4)
require.Equal(t, c4.String(), "192.168.12.0/22")
})
}
func TestIpamer_AcquireChildPrefixCounts(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
allPrefixes, err := ipam.storage.ReadAllPrefixes()
require.Nil(t, err)
require.Equal(t, 0, len(allPrefixes))
prefix, err := ipam.NewPrefix("192.168.0.0/20")
require.Nil(t, err)
s, _ := prefix.availablePrefixes()
require.Equal(t, s, uint64(1024))
require.Equal(t, prefix.acquiredPrefixes(), uint64(0))
require.Equal(t, prefix.Usage().AcquiredPrefixes, uint64(0))
usage := prefix.Usage()
require.Equal(t, "ip:2/4096", usage.String())
allPrefixes, err = ipam.storage.ReadAllPrefixes()
require.Nil(t, err)
require.Equal(t, 1, len(allPrefixes))
c1, err := ipam.AcquireChildPrefix(prefix.Cidr, 22)
require.Nil(t, err)
require.NotNil(t, c1)
prefix = ipam.PrefixFrom(prefix.Cidr)
s, _ = prefix.availablePrefixes()
require.Equal(t, uint64(768), s)
require.Equal(t, uint64(1), prefix.acquiredPrefixes())
require.Equal(t, uint64(1), prefix.Usage().AcquiredPrefixes)
usage = prefix.Usage()
require.Equal(t, "ip:2/4096 prefixes alloc:1 avail:768", usage.String())
allPrefixes, err = ipam.storage.ReadAllPrefixes()
require.Nil(t, err)
require.Equal(t, 2, len(allPrefixes))
c2, err := ipam.AcquireChildPrefix(prefix.Cidr, 22)
require.Nil(t, err)
require.NotNil(t, c2)
prefix = ipam.PrefixFrom(prefix.Cidr)
s, _ = prefix.availablePrefixes()
require.Equal(t, uint64(512), s)
require.Equal(t, prefix.acquiredPrefixes(), uint64(2))
require.Equal(t, prefix.Usage().AcquiredPrefixes, uint64(2))
require.True(t, strings.HasSuffix(c1.Cidr, "/22"))
require.True(t, strings.HasSuffix(c2.Cidr, "/22"))
require.True(t, strings.HasPrefix(c1.Cidr, "192.168."))
require.True(t, strings.HasPrefix(c2.Cidr, "192.168."))
allPrefixes, err = ipam.storage.ReadAllPrefixes()
require.Nil(t, err)
require.Equal(t, 3, len(allPrefixes))
err = ipam.ReleaseChildPrefix(c1)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Nil(t, err)
s, _ = prefix.availablePrefixes()
require.Equal(t, uint64(768), s)
require.Equal(t, uint64(1), prefix.acquiredPrefixes())
allPrefixes, err = ipam.storage.ReadAllPrefixes()
require.Nil(t, err)
require.Equal(t, 2, len(allPrefixes))
err = ipam.ReleaseChildPrefix(c2)
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Nil(t, err)
s, _ = prefix.availablePrefixes()
require.Equal(t, uint64(1024), s)
require.Equal(t, uint64(0), prefix.acquiredPrefixes())
require.Equal(t, prefix.Usage().AcquiredPrefixes, uint64(0))
allPrefixes, err = ipam.storage.ReadAllPrefixes()
require.Nil(t, err)
require.Equal(t, 1, len(allPrefixes))
err = ipam.ReleaseChildPrefix(c1)
require.Errorf(t, err, "unable to release prefix %s:delete prefix:%s not found", c1.Cidr)
c3, err := ipam.AcquireChildPrefix(prefix.Cidr, 22)
require.Nil(t, err)
require.NotNil(t, c2)
ip1, err := ipam.AcquireIP(c3.Cidr)
require.Nil(t, err)
require.NotNil(t, ip1)
err = ipam.ReleaseChildPrefix(c3)
require.Errorf(t, err, "prefix %s has ips, deletion not possible", c3.Cidr)
c3, err = ipam.ReleaseIP(ip1)
require.Nil(t, err)
err = ipam.ReleaseChildPrefix(c3)
require.Nil(t, err)
allPrefixes, err = ipam.storage.ReadAllPrefixes()
require.Nil(t, err)
require.Equal(t, 1, len(allPrefixes))
})
}
func TestIpamer_AcquireChildPrefixIPv4(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix, err := ipam.NewPrefix("192.168.0.0/20")
require.Nil(t, err)
s, _ := prefix.availablePrefixes()
require.Equal(t, uint64(1024), s)
require.Equal(t, prefix.acquiredPrefixes(), uint64(0))
// Same length
cp, err := ipam.AcquireChildPrefix(prefix.Cidr, 20)
require.NotNil(t, err)
require.Equal(t, "given length:20 must be greater than prefix length:20", err.Error())
require.Nil(t, cp)
// working length
cp, err = ipam.AcquireChildPrefix(prefix.Cidr, 21)
require.Nil(t, err)
require.NotNil(t, cp)
require.True(t, strings.HasPrefix(cp.Cidr, "192.168."))
require.True(t, strings.HasSuffix(cp.Cidr, "/21"))
require.Equal(t, prefix.Cidr, cp.ParentCidr)
// No more ChildPrefixes
cp, err = ipam.AcquireChildPrefix(prefix.Cidr, 21)
require.Nil(t, err)
require.NotNil(t, cp)
cp, err = ipam.AcquireChildPrefix(prefix.Cidr, 21)
require.NotNil(t, err)
require.Equal(t, "no prefix found in 192.168.0.0/20 with length:21", err.Error())
require.Nil(t, cp)
// Prefix has ips
p2, err := ipam.NewPrefix("10.0.0.0/24")
require.Nil(t, err)
s, _ = p2.availablePrefixes()
require.Equal(t, uint64(64), s)
require.Equal(t, p2.acquiredPrefixes(), uint64(0))
ip, err := ipam.AcquireIP(p2.Cidr)
require.Nil(t, err)
require.NotNil(t, ip)
cp2, err := ipam.AcquireChildPrefix(p2.Cidr, 25)
require.NotNil(t, err)
require.Equal(t, "prefix 10.0.0.0/24 has ips, acquire child prefix not possible", err.Error())
require.Nil(t, cp2)
// Prefix has Childs, AcquireIP wont work
p3, err := ipam.NewPrefix("172.17.0.0/24")
require.Nil(t, err)
s, _ = p3.availablePrefixes()
require.Equal(t, uint64(64), s)
require.Equal(t, p3.acquiredPrefixes(), uint64(0))
cp3, err := ipam.AcquireChildPrefix(p3.Cidr, 25)
require.Nil(t, err)
require.NotNil(t, cp3)
p3 = ipam.PrefixFrom(p3.Cidr)
ip, err = ipam.AcquireIP(p3.Cidr)
require.NotNil(t, err)
require.Equal(t, "prefix 172.17.0.0/24 has childprefixes, acquire ip not possible", err.Error())
require.Nil(t, ip)
// Release Parent Prefix must not work
err = ipam.ReleaseChildPrefix(p3)
require.NotNil(t, err)
require.Equal(t, "prefix 172.17.0.0/24 is no child prefix", err.Error())
})
}
func TestIpamer_AcquireChildPrefixIPv6(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix, err := ipam.NewPrefix("2001:0db8:85a3::/116")
require.Nil(t, err)
s, _ := prefix.availablePrefixes()
require.Equal(t, uint64(1024), s)
require.Equal(t, prefix.acquiredPrefixes(), uint64(0))
// Same length
cp, err := ipam.AcquireChildPrefix(prefix.Cidr, 116)
require.NotNil(t, err)
require.Equal(t, "given length:116 must be greater than prefix length:116", err.Error())
require.Nil(t, cp)
// working length
cp, err = ipam.AcquireChildPrefix(prefix.Cidr, 117)
require.Nil(t, err)
require.NotNil(t, cp)
require.True(t, strings.HasPrefix(cp.Cidr, "2001:db8:85a3:"))
require.True(t, strings.HasSuffix(cp.Cidr, "/117"))
require.Equal(t, prefix.Cidr, cp.ParentCidr)
// No more ChildPrefixes
cp, err = ipam.AcquireChildPrefix(prefix.Cidr, 117)
require.Nil(t, err)
require.NotNil(t, cp)
cp, err = ipam.AcquireChildPrefix(prefix.Cidr, 117)
require.NotNil(t, err)
require.Equal(t, "no prefix found in 2001:0db8:85a3::/116 with length:117", err.Error())
require.Nil(t, cp)
// Prefix has ips
p2, err := ipam.NewPrefix("2001:0db8:95a3::/120")
require.Nil(t, err)
s, _ = p2.availablePrefixes()
require.Equal(t, uint64(64), s)
require.Equal(t, p2.acquiredPrefixes(), uint64(0))
ip, err := ipam.AcquireIP(p2.Cidr)
require.Nil(t, err)
require.NotNil(t, ip)
cp2, err := ipam.AcquireChildPrefix(p2.Cidr, 121)
require.NotNil(t, err)
require.Equal(t, "prefix 2001:0db8:95a3::/120 has ips, acquire child prefix not possible", err.Error())
require.Nil(t, cp2)
// Prefix has Childs, AcquireIP wont work
p3, err := ipam.NewPrefix("2001:0db8:75a3::/120")
require.Nil(t, err)
s, _ = p3.availablePrefixes()
require.Equal(t, uint64(64), s)
require.Equal(t, p3.acquiredPrefixes(), uint64(0))
cp3, err := ipam.AcquireChildPrefix(p3.Cidr, 121)
require.Nil(t, err)
require.NotNil(t, cp3)
p3 = ipam.PrefixFrom(p3.Cidr)
ip, err = ipam.AcquireIP(p3.Cidr)
require.NotNil(t, err)
require.Equal(t, "prefix 2001:0db8:75a3::/120 has childprefixes, acquire ip not possible", err.Error())
require.Nil(t, ip)
// Release Parent Prefix must not work
err = ipam.ReleaseChildPrefix(p3)
require.NotNil(t, err)
require.Equal(t, "prefix 2001:0db8:75a3::/120 is no child prefix", err.Error())
})
}
func TestIpamer_AcquireChildPrefixNoDuplicatesUntilFullIPv6(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix, err := ipam.NewPrefix("2001:0db8:85a3::/112")
require.Nil(t, err)
s, _ := prefix.availablePrefixes()
require.Equal(t, uint64(16384), s)
require.Equal(t, uint64(0), prefix.acquiredPrefixes())
uniquePrefixes := make(map[string]bool)
// acquire all /120 prefixes (2^8 = 256)
for i := 0; i < 256; i++ {
cp, err := ipam.AcquireChildPrefix(prefix.Cidr, 120)
require.Nil(t, err)
require.NotNil(t, cp)
require.True(t, strings.HasPrefix(cp.Cidr, "2001:db8:85a3:"))
require.True(t, strings.HasSuffix(cp.Cidr, "/120"))
require.Equal(t, prefix.Cidr, cp.ParentCidr)
_, ok := uniquePrefixes[cp.String()]
require.False(t, ok)
uniquePrefixes[cp.String()] = true
}
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, 256, len(uniquePrefixes))
s, _ = prefix.availablePrefixes()
require.Equal(t, uint64(0), s)
require.Equal(t, prefix.acquiredPrefixes(), uint64(256))
})
}
func TestIpamer_AcquireChildPrefixNoDuplicatesUntilFullIPv4(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix, err := ipam.NewPrefix("192.168.0.0/16")
require.Nil(t, err)
s, _ := prefix.availablePrefixes()
require.Equal(t, uint64(16384), s)
require.Equal(t, uint64(0), prefix.acquiredPrefixes())
uniquePrefixes := make(map[string]bool)
// acquire all /24 prefixes (2^8 = 256)
for i := 0; i < 256; i++ {
cp, err := ipam.AcquireChildPrefix(prefix.Cidr, 24)
require.Nil(t, err)
require.NotNil(t, cp)
require.True(t, strings.HasPrefix(cp.Cidr, "192.168."))
require.True(t, strings.HasSuffix(cp.Cidr, "/24"))
require.Equal(t, prefix.Cidr, cp.ParentCidr)
_, ok := uniquePrefixes[cp.String()]
require.False(t, ok)
uniquePrefixes[cp.String()] = true
}
prefix = ipam.PrefixFrom(prefix.Cidr)
require.Equal(t, 256, len(uniquePrefixes))
s, _ = prefix.availablePrefixes()
require.Equal(t, uint64(0), s)
require.Equal(t, prefix.acquiredPrefixes(), uint64(256))
})
}
func TestPrefix_Availableips(t *testing.T) {
tests := []struct {
name string
Cidr string
want uint64
}{
{
name: "large",
Cidr: "192.168.0.0/20",
want: 4096,
},
{
name: "small",
Cidr: "192.168.0.0/24",
want: 256,
},
{
name: "smaller",
Cidr: "192.168.0.0/25",
want: 128,
},
{
name: "smaller",
Cidr: "192.168.0.0/30",
want: 4,
},
{
name: "smaller IPv6",
Cidr: "2001:0db8:85a3::/126",
want: 4,
},
{
name: "large IPv6",
Cidr: "2001:0db8:85a3::/116",
want: 4096,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
p := &Prefix{
Cidr: tt.Cidr,
}
if got := p.availableips(); got != tt.want {
t.Errorf("Prefix.Availableips() = %v, want %v", got, tt.want)
}
})
}
}
func TestIpamer_PrefixesOverlapping(t *testing.T) {
tests := []struct {
name string
existingPrefixes []string
newPrefixes []string
wantErr bool
errorString string
}{
{
name: "simple",
existingPrefixes: []string{"192.168.0.0/24"},
newPrefixes: []string{"192.168.1.0/24"},
wantErr: false,
errorString: "",
},
{
name: "simple IPv6",
existingPrefixes: []string{"2001:0db8:85a3::/126"},
newPrefixes: []string{"2001:0db8:85a4::/126"},
wantErr: false,
errorString: "",
},
{
name: "one overlap IPv6",
existingPrefixes: []string{"2001:0db8:85a3::/126", "2001:0db8:85a4::/126"},
newPrefixes: []string{"2001:0db8:85a4::/126"},
wantErr: true,
errorString: "2001:0db8:85a4::/126 overlaps 2001:0db8:85a4::/126",
},
{
name: "one overlap",
existingPrefixes: []string{"192.168.0.0/24", "192.168.1.0/24"},
newPrefixes: []string{"192.168.1.0/24"},
wantErr: true,
errorString: "192.168.1.0/24 overlaps 192.168.1.0/24",
},
{
name: "one overlap",
existingPrefixes: []string{"192.168.0.0/24", "192.168.1.0/24"},
newPrefixes: []string{"192.168.0.0/23"},
wantErr: true,
errorString: "192.168.0.0/23 overlaps 192.168.0.0/24",
},
{
name: "one overlap",
existingPrefixes: []string{"192.168.0.0/23", "192.168.2.0/23"},
newPrefixes: []string{"192.168.3.0/24"},
wantErr: true,
errorString: "192.168.3.0/24 overlaps 192.168.2.0/23",
},
{
name: "one overlap",
existingPrefixes: []string{"192.168.128.0/25"},
newPrefixes: []string{"192.168.128.0/27"},
wantErr: true,
errorString: "192.168.128.0/27 overlaps 192.168.128.0/25",
},
}
for _, tt := range tests {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
for _, ep := range tt.existingPrefixes {
p, err := ipam.NewPrefix(ep)
if err != nil {
t.Errorf("Newprefix on ExistingPrefix failed:%v", err)
}
if p == nil {
t.Errorf("Newprefix on ExistingPrefix returns nil")
}
}
err := ipam.PrefixesOverlapping(tt.existingPrefixes, tt.newPrefixes)
if tt.wantErr && err == nil {
t.Errorf("Ipamer.PrefixesOverlapping() expected error but err was nil")
}
if tt.wantErr && err != nil && err.Error() != tt.errorString {
t.Errorf("Ipamer.PrefixesOverlapping() error = %v, wantErr %v, errorString = %v", err, tt.wantErr, tt.errorString)
}
if !tt.wantErr && err != nil {
t.Errorf("Ipamer.PrefixesOverlapping() error = %v, wantErr %v", err, tt.wantErr)
}
})
}
}
func TestIpamer_NewPrefix(t *testing.T) {
tests := []struct {
name string
cidr string
parentCidr string
wantErr bool
errorString string
}{
{
name: "valid Prefix",
cidr: "192.168.0.0/24",
parentCidr: "",
wantErr: false,
},
{
name: "invalid Prefix",
cidr: "192.168.0.0/33",
wantErr: true,
errorString: "unable to parse cidr:192.168.0.0/33 netaddr.ParseIPPrefix(\"33\"): prefix length out of range",
},
{
name: "valid IPv6 Prefix",
cidr: "2001:0db8:85a3::/120",
wantErr: false,
},
{
name: "invalid IPv6 Prefix length",
cidr: "2001:0db8:85a3::/129",
wantErr: true,
errorString: "unable to parse cidr:2001:0db8:85a3::/129 netaddr.ParseIPPrefix(\"129\"): prefix length out of range",
},
{
name: "invalid IPv6 Prefix length",
cidr: "2001:0db8:85a3:::/120",
wantErr: true,
errorString: "unable to parse cidr:2001:0db8:85a3:::/120 netaddr.ParseIPPrefix(\"2001:0db8:85a3:::/120\"): ParseIP(\"2001:0db8:85a3:::\"): each colon-separated field must have at least one digit (at \":\")",
},
}
for _, tt := range tests {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
got, err := ipam.NewPrefix(tt.cidr)
if (err != nil) != tt.wantErr {
t.Errorf("Ipamer.NewPrefix() error = %v, wantErr %v", err, tt.wantErr)
return
}
if (err != nil) && tt.errorString != err.Error() {
t.Errorf("Ipamer.NewPrefix() error = %v, errorString %v", err, tt.errorString)
return
}
if err != nil {
return
}
if got.Cidr != tt.cidr {
t.Errorf("Ipamer.NewPrefix() = %v, want %v", got.Cidr, tt.cidr)
}
if got.ParentCidr != tt.parentCidr {
t.Errorf("Ipamer.NewPrefix() = %v, want %v", got.ParentCidr, tt.parentCidr)
}
})
}
}
func TestIpamer_DeletePrefix(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
// IPv4
prefix, err := ipam.NewPrefix("192.168.0.0/20")
require.Nil(t, err)
s, _ := prefix.availablePrefixes()
require.Equal(t, uint64(1024), s)
require.Equal(t, prefix.acquiredPrefixes(), uint64(0))
require.Equal(t, prefix.Usage().AcquiredPrefixes, uint64(0))
ip, err := ipam.AcquireIP(prefix.Cidr)
require.Nil(t, err)
require.NotNil(t, ip)
_, err = ipam.DeletePrefix(prefix.Cidr)
require.NotNil(t, err)
require.Equal(t, "prefix 192.168.0.0/20 has ips, delete prefix not possible", err.Error())
// IPv6
prefix, err = ipam.NewPrefix("2001:0db8:85a3::/120")
require.Nil(t, err)
s, _ = prefix.availablePrefixes()
require.Equal(t, uint64(64), s)
require.Equal(t, prefix.acquiredPrefixes(), uint64(0))
require.Equal(t, prefix.Usage().AcquiredPrefixes, uint64(0))
ip, err = ipam.AcquireIP(prefix.Cidr)
require.Nil(t, err)
require.NotNil(t, ip)
_, err = ipam.DeletePrefix(prefix.Cidr)
require.NotNil(t, err)
require.Equal(t, "prefix 2001:0db8:85a3::/120 has ips, delete prefix not possible", err.Error())
_, err = ipam.ReleaseIP(ip)
require.Nil(t, err)
_, err = ipam.DeletePrefix(prefix.Cidr)
require.Nil(t, err)
})
}
func TestIpamer_PrefixFrom(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
prefix := ipam.PrefixFrom("192.168.0.0/20")
require.Nil(t, prefix)
prefix, err := ipam.NewPrefix("192.168.0.0/20")
require.Nil(t, err)
require.NotNil(t, prefix)
prefix = ipam.PrefixFrom("192.168.0.0/20")
require.NotNil(t, prefix)
})
}
func TestIpamerAcquireIP(t *testing.T) {
testWithBackends(t, func(t *testing.T, ipam *ipamer) {
cidr := "10.0.0.0/16"
p, err := ipam.NewPrefix(cidr)
if err != nil {
panic(err)
}
for n := 0; n < 10; n++ {
if len(p.ips) != 2 {
t.Fatalf("expected 2 ips in prefix, got %d", len(p.ips))
}
ip, err := ipam.AcquireIP(p.Cidr)