739 lines
20 KiB
Go
739 lines
20 KiB
Go
package proxycfg
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import (
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"context"
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"fmt"
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"path"
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"sync"
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"sync/atomic"
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"time"
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"github.com/hashicorp/consul/agent/cache"
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cachetype "github.com/hashicorp/consul/agent/cache-types"
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"github.com/hashicorp/consul/agent/connect"
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"github.com/hashicorp/consul/agent/consul/discoverychain"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/mitchellh/go-testing-interface"
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"github.com/stretchr/testify/require"
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)
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// TestCacheTypes encapsulates all the different cache types proxycfg.State will
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// watch/request for controlling one during testing.
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type TestCacheTypes struct {
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roots *ControllableCacheType
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leaf *ControllableCacheType
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intentions *ControllableCacheType
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health *ControllableCacheType
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query *ControllableCacheType
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compiledChain *ControllableCacheType
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}
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// NewTestCacheTypes creates a set of ControllableCacheTypes for all types that
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// proxycfg will watch suitable for testing a proxycfg.State or Manager.
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func NewTestCacheTypes(t testing.T) *TestCacheTypes {
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t.Helper()
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ct := &TestCacheTypes{
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roots: NewControllableCacheType(t),
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leaf: NewControllableCacheType(t),
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intentions: NewControllableCacheType(t),
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health: NewControllableCacheType(t),
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query: NewControllableCacheType(t),
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compiledChain: NewControllableCacheType(t),
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}
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ct.query.blocking = false
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return ct
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}
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// TestCacheWithTypes registers ControllableCacheTypes for all types that
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// proxycfg will watch suitable for testing a proxycfg.State or Manager.
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func TestCacheWithTypes(t testing.T, types *TestCacheTypes) *cache.Cache {
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c := cache.TestCache(t)
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c.RegisterType(cachetype.ConnectCARootName, types.roots, &cache.RegisterOptions{
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Refresh: true,
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RefreshTimer: 0,
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RefreshTimeout: 10 * time.Minute,
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})
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c.RegisterType(cachetype.ConnectCALeafName, types.leaf, &cache.RegisterOptions{
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Refresh: true,
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RefreshTimer: 0,
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RefreshTimeout: 10 * time.Minute,
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})
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c.RegisterType(cachetype.IntentionMatchName, types.intentions, &cache.RegisterOptions{
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Refresh: true,
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RefreshTimer: 0,
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RefreshTimeout: 10 * time.Minute,
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})
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c.RegisterType(cachetype.HealthServicesName, types.health, &cache.RegisterOptions{
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Refresh: true,
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RefreshTimer: 0,
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RefreshTimeout: 10 * time.Minute,
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})
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c.RegisterType(cachetype.PreparedQueryName, types.query, &cache.RegisterOptions{
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Refresh: false,
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})
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c.RegisterType(cachetype.CompiledDiscoveryChainName, types.compiledChain, &cache.RegisterOptions{
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Refresh: true,
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RefreshTimer: 0,
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RefreshTimeout: 10 * time.Minute,
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})
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return c
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}
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// TestCerts generates a CA and Leaf suitable for returning as mock CA
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// root/leaf cache requests.
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func TestCerts(t testing.T) (*structs.IndexedCARoots, *structs.IssuedCert) {
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t.Helper()
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ca := connect.TestCA(t, nil)
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roots := &structs.IndexedCARoots{
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ActiveRootID: ca.ID,
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TrustDomain: fmt.Sprintf("%s.consul", connect.TestClusterID),
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Roots: []*structs.CARoot{ca},
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}
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return roots, TestLeafForCA(t, ca)
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}
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// TestLeafForCA generates new Leaf suitable for returning as mock CA
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// leaf cache response, signed by an existing CA.
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func TestLeafForCA(t testing.T, ca *structs.CARoot) *structs.IssuedCert {
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leafPEM, pkPEM := connect.TestLeaf(t, "web", ca)
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leafCert, err := connect.ParseCert(leafPEM)
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require.NoError(t, err)
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return &structs.IssuedCert{
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SerialNumber: connect.HexString(leafCert.SerialNumber.Bytes()),
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CertPEM: leafPEM,
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PrivateKeyPEM: pkPEM,
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Service: "web",
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ServiceURI: leafCert.URIs[0].String(),
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ValidAfter: leafCert.NotBefore,
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ValidBefore: leafCert.NotAfter,
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}
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}
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// TestIntentions returns a sample intentions match result useful to
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// mocking service discovery cache results.
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func TestIntentions(t testing.T) *structs.IndexedIntentionMatches {
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return &structs.IndexedIntentionMatches{
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Matches: []structs.Intentions{
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[]*structs.Intention{
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&structs.Intention{
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ID: "foo",
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SourceNS: "default",
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SourceName: "billing",
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DestinationNS: "default",
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DestinationName: "web",
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Action: structs.IntentionActionAllow,
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},
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},
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},
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}
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}
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// TestUpstreamNodes returns a sample service discovery result useful to
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// mocking service discovery cache results.
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func TestUpstreamNodes(t testing.T) structs.CheckServiceNodes {
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return structs.CheckServiceNodes{
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "test1",
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Node: "test1",
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Address: "10.10.1.1",
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Datacenter: "dc1",
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},
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Service: structs.TestNodeService(t),
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "test2",
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Node: "test2",
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Address: "10.10.1.2",
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Datacenter: "dc1",
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},
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Service: structs.TestNodeService(t),
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},
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}
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}
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func TestUpstreamNodesDC2(t testing.T) structs.CheckServiceNodes {
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return structs.CheckServiceNodes{
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "test1",
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Node: "test1",
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Address: "10.20.1.1",
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Datacenter: "dc2",
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},
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Service: structs.TestNodeService(t),
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "test2",
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Node: "test2",
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Address: "10.20.1.2",
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Datacenter: "dc2",
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},
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Service: structs.TestNodeService(t),
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},
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}
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}
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func TestUpstreamNodesAlternate(t testing.T) structs.CheckServiceNodes {
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return structs.CheckServiceNodes{
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "alt-test1",
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Node: "alt-test1",
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Address: "10.20.1.1",
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Datacenter: "dc1",
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},
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Service: structs.TestNodeService(t),
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "alt-test2",
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Node: "alt-test2",
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Address: "10.20.1.2",
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Datacenter: "dc1",
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},
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Service: structs.TestNodeService(t),
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},
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}
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}
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func TestGatewayNodesDC2(t testing.T) structs.CheckServiceNodes {
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return structs.CheckServiceNodes{
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "mesh-gateway-1",
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Node: "mesh-gateway",
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Address: "10.0.1.1",
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Datacenter: "dc2",
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},
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Service: structs.TestNodeServiceMeshGatewayWithAddrs(t,
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"10.0.1.1", 8443,
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structs.ServiceAddress{Address: "10.0.1.1", Port: 8443},
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structs.ServiceAddress{Address: "198.18.1.1", Port: 443}),
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "mesh-gateway-2",
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Node: "mesh-gateway",
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Address: "10.0.1.2",
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Datacenter: "dc2",
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},
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Service: structs.TestNodeServiceMeshGatewayWithAddrs(t,
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"10.0.1.2", 8443,
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structs.ServiceAddress{Address: "10.0.1.2", Port: 8443},
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structs.ServiceAddress{Address: "198.18.1.2", Port: 443}),
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},
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}
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}
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func TestGatewayServiceGroupBarDC1(t testing.T) structs.CheckServiceNodes {
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return structs.CheckServiceNodes{
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "bar-node-1",
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Node: "bar-node-1",
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Address: "10.1.1.4",
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Datacenter: "dc1",
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},
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Service: &structs.NodeService{
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Kind: structs.ServiceKindConnectProxy,
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Service: "bar-sidecar-proxy",
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Address: "172.16.1.6",
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Port: 2222,
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Meta: map[string]string{
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"version": "1",
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},
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Proxy: structs.ConnectProxyConfig{
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DestinationServiceName: "bar",
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Upstreams: structs.TestUpstreams(t),
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},
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},
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "bar-node-2",
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Node: "bar-node-2",
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Address: "10.1.1.5",
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Datacenter: "dc1",
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},
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Service: &structs.NodeService{
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Kind: structs.ServiceKindConnectProxy,
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Service: "bar-sidecar-proxy",
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Address: "172.16.1.7",
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Port: 2222,
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Meta: map[string]string{
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"version": "1",
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},
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Proxy: structs.ConnectProxyConfig{
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DestinationServiceName: "bar",
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Upstreams: structs.TestUpstreams(t),
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},
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},
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "bar-node-3",
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Node: "bar-node-3",
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Address: "10.1.1.6",
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Datacenter: "dc1",
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},
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Service: &structs.NodeService{
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Kind: structs.ServiceKindConnectProxy,
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Service: "bar-sidecar-proxy",
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Address: "172.16.1.8",
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Port: 2222,
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Meta: map[string]string{
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"version": "2",
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},
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Proxy: structs.ConnectProxyConfig{
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DestinationServiceName: "bar",
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Upstreams: structs.TestUpstreams(t),
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},
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},
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},
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}
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}
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func TestGatewayServiceGroupFooDC1(t testing.T) structs.CheckServiceNodes {
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return structs.CheckServiceNodes{
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "foo-node-1",
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Node: "foo-node-1",
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Address: "10.1.1.1",
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Datacenter: "dc1",
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},
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Service: &structs.NodeService{
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Kind: structs.ServiceKindConnectProxy,
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Service: "foo-sidecar-proxy",
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Address: "172.16.1.3",
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Port: 2222,
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Meta: map[string]string{
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"version": "1",
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},
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Proxy: structs.ConnectProxyConfig{
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DestinationServiceName: "foo",
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Upstreams: structs.TestUpstreams(t),
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},
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},
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "foo-node-2",
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Node: "foo-node-2",
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Address: "10.1.1.2",
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Datacenter: "dc1",
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},
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Service: &structs.NodeService{
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Kind: structs.ServiceKindConnectProxy,
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Service: "foo-sidecar-proxy",
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Address: "172.16.1.4",
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Port: 2222,
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Meta: map[string]string{
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"version": "1",
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},
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Proxy: structs.ConnectProxyConfig{
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DestinationServiceName: "foo",
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Upstreams: structs.TestUpstreams(t),
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},
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},
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "foo-node-3",
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Node: "foo-node-3",
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Address: "10.1.1.3",
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Datacenter: "dc1",
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},
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Service: &structs.NodeService{
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Kind: structs.ServiceKindConnectProxy,
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Service: "foo-sidecar-proxy",
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Address: "172.16.1.5",
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Port: 2222,
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Meta: map[string]string{
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"version": "2",
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},
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Proxy: structs.ConnectProxyConfig{
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DestinationServiceName: "foo",
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Upstreams: structs.TestUpstreams(t),
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},
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},
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},
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structs.CheckServiceNode{
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Node: &structs.Node{
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ID: "foo-node-4",
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Node: "foo-node-4",
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Address: "10.1.1.7",
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Datacenter: "dc1",
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},
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Service: &structs.NodeService{
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Kind: structs.ServiceKindConnectProxy,
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Service: "foo-sidecar-proxy",
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Address: "172.16.1.9",
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Port: 2222,
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Meta: map[string]string{
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"version": "2",
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},
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Proxy: structs.ConnectProxyConfig{
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DestinationServiceName: "foo",
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Upstreams: structs.TestUpstreams(t),
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},
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},
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Checks: structs.HealthChecks{
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&structs.HealthCheck{
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Node: "foo-node-4",
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ServiceName: "foo-sidecar-proxy",
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Name: "proxy-alive",
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Status: "warning",
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},
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},
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},
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}
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}
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// TestConfigSnapshot returns a fully populated snapshot
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func TestConfigSnapshot(t testing.T) *ConfigSnapshot {
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roots, leaf := TestCerts(t)
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return &ConfigSnapshot{
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Kind: structs.ServiceKindConnectProxy,
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Service: "web-sidecar-proxy",
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ProxyID: "web-sidecar-proxy",
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Address: "0.0.0.0",
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Port: 9999,
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Proxy: structs.ConnectProxyConfig{
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DestinationServiceID: "web",
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DestinationServiceName: "web",
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LocalServiceAddress: "127.0.0.1",
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LocalServicePort: 8080,
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Config: map[string]interface{}{
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"foo": "bar",
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},
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Upstreams: structs.TestUpstreams(t),
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},
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Roots: roots,
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ConnectProxy: configSnapshotConnectProxy{
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Leaf: leaf,
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UpstreamEndpoints: map[string]structs.CheckServiceNodes{
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"db": TestUpstreamNodes(t),
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"prepared_query:geo-cache": TestUpstreamNodes(t),
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},
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},
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Datacenter: "dc1",
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}
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}
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|
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// TestConfigSnapshotDiscoveryChain returns a fully populated snapshot using a discovery chain
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func TestConfigSnapshotDiscoveryChain(t testing.T) *ConfigSnapshot {
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return testConfigSnapshotDiscoveryChain(t, "simple")
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}
|
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|
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func TestConfigSnapshotDiscoveryChainWithOverrides(t testing.T) *ConfigSnapshot {
|
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return testConfigSnapshotDiscoveryChain(t, "simple-with-overrides")
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}
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|
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func TestConfigSnapshotDiscoveryChainWithFailover(t testing.T) *ConfigSnapshot {
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return testConfigSnapshotDiscoveryChain(t, "failover")
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}
|
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|
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func TestConfigSnapshotDiscoveryChain_SplitterWithResolverRedirectMultiDC(t testing.T) *ConfigSnapshot {
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return testConfigSnapshotDiscoveryChain(t, "splitter-with-resolver-redirect-multidc")
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}
|
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|
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func TestConfigSnapshotDiscoveryChainWithEntries(t testing.T, additionalEntries ...structs.ConfigEntry) *ConfigSnapshot {
|
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return testConfigSnapshotDiscoveryChain(t, "simple", additionalEntries...)
|
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}
|
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|
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func testConfigSnapshotDiscoveryChain(t testing.T, variation string, additionalEntries ...structs.ConfigEntry) *ConfigSnapshot {
|
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roots, leaf := TestCerts(t)
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|
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// Compile a chain.
|
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var (
|
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entries []structs.ConfigEntry
|
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compileSetup func(req *discoverychain.CompileRequest)
|
|
)
|
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switch variation {
|
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case "simple-with-overrides":
|
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compileSetup = func(req *discoverychain.CompileRequest) {
|
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req.OverrideMeshGateway.Mode = structs.MeshGatewayModeLocal
|
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req.OverrideProtocol = "grpc"
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req.OverrideConnectTimeout = 66 * time.Second
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}
|
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fallthrough
|
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case "simple":
|
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entries = append(entries,
|
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&structs.ServiceResolverConfigEntry{
|
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Kind: structs.ServiceResolver,
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Name: "db",
|
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ConnectTimeout: 33 * time.Second,
|
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},
|
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)
|
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case "failover":
|
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entries = append(entries,
|
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&structs.ServiceResolverConfigEntry{
|
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Kind: structs.ServiceResolver,
|
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Name: "db",
|
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ConnectTimeout: 33 * time.Second,
|
|
Failover: map[string]structs.ServiceResolverFailover{
|
|
"*": {
|
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Service: "fail",
|
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},
|
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},
|
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},
|
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)
|
|
case "splitter-with-resolver-redirect-multidc":
|
|
entries = append(entries,
|
|
&structs.ProxyConfigEntry{
|
|
Kind: structs.ProxyDefaults,
|
|
Name: structs.ProxyConfigGlobal,
|
|
Config: map[string]interface{}{
|
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"protocol": "http",
|
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},
|
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},
|
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&structs.ServiceSplitterConfigEntry{
|
|
Kind: structs.ServiceResolver,
|
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Name: "db",
|
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Splits: []structs.ServiceSplit{
|
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{Weight: 50, Service: "db-dc1"},
|
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{Weight: 50, Service: "db-dc2"},
|
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},
|
|
},
|
|
&structs.ServiceResolverConfigEntry{
|
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Kind: structs.ServiceResolver,
|
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Name: "db-dc1",
|
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Redirect: &structs.ServiceResolverRedirect{
|
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Service: "db",
|
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ServiceSubset: "v1",
|
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Datacenter: "dc1",
|
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},
|
|
},
|
|
&structs.ServiceResolverConfigEntry{
|
|
Kind: structs.ServiceResolver,
|
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Name: "db-dc2",
|
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Redirect: &structs.ServiceResolverRedirect{
|
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Service: "db",
|
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ServiceSubset: "v2",
|
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Datacenter: "dc2",
|
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},
|
|
},
|
|
&structs.ServiceResolverConfigEntry{
|
|
Kind: structs.ServiceResolver,
|
|
Name: "db",
|
|
Subsets: map[string]structs.ServiceResolverSubset{
|
|
"v1": structs.ServiceResolverSubset{
|
|
Filter: "Service.Meta.version == v1",
|
|
},
|
|
"v2": structs.ServiceResolverSubset{
|
|
Filter: "Service.Meta.version == v2",
|
|
},
|
|
},
|
|
},
|
|
)
|
|
default:
|
|
t.Fatalf("unexpected variation: %q", variation)
|
|
return nil
|
|
}
|
|
|
|
if len(additionalEntries) > 0 {
|
|
entries = append(entries, additionalEntries...)
|
|
}
|
|
|
|
dbChain := discoverychain.TestCompileConfigEntries(t, "db", "default", "dc1", compileSetup, entries...)
|
|
|
|
dbTarget := structs.DiscoveryTarget{
|
|
Service: "db",
|
|
Namespace: "default",
|
|
Datacenter: "dc1",
|
|
}
|
|
failTarget := structs.DiscoveryTarget{
|
|
Service: "fail",
|
|
Namespace: "default",
|
|
Datacenter: "dc1",
|
|
}
|
|
|
|
snap := &ConfigSnapshot{
|
|
Kind: structs.ServiceKindConnectProxy,
|
|
Service: "web-sidecar-proxy",
|
|
ProxyID: "web-sidecar-proxy",
|
|
Address: "0.0.0.0",
|
|
Port: 9999,
|
|
Proxy: structs.ConnectProxyConfig{
|
|
DestinationServiceID: "web",
|
|
DestinationServiceName: "web",
|
|
LocalServiceAddress: "127.0.0.1",
|
|
LocalServicePort: 8080,
|
|
Config: map[string]interface{}{
|
|
"foo": "bar",
|
|
},
|
|
Upstreams: structs.TestUpstreams(t),
|
|
},
|
|
Roots: roots,
|
|
ConnectProxy: configSnapshotConnectProxy{
|
|
Leaf: leaf,
|
|
DiscoveryChain: map[string]*structs.CompiledDiscoveryChain{
|
|
"db": dbChain,
|
|
},
|
|
WatchedUpstreamEndpoints: map[string]map[structs.DiscoveryTarget]structs.CheckServiceNodes{
|
|
"db": map[structs.DiscoveryTarget]structs.CheckServiceNodes{
|
|
dbTarget: TestUpstreamNodes(t),
|
|
},
|
|
},
|
|
},
|
|
Datacenter: "dc1",
|
|
}
|
|
|
|
switch variation {
|
|
case "simple-with-overrides":
|
|
case "simple":
|
|
case "failover":
|
|
snap.ConnectProxy.WatchedUpstreamEndpoints["db"][failTarget] =
|
|
TestUpstreamNodesAlternate(t)
|
|
case "splitter-with-resolver-redirect-multidc":
|
|
dbTarget_v1_dc1 := structs.DiscoveryTarget{
|
|
Service: "db",
|
|
ServiceSubset: "v1",
|
|
Namespace: "default",
|
|
Datacenter: "dc1",
|
|
}
|
|
dbTarget_v2_dc2 := structs.DiscoveryTarget{
|
|
Service: "db",
|
|
ServiceSubset: "v2",
|
|
Namespace: "default",
|
|
Datacenter: "dc2",
|
|
}
|
|
snap.ConnectProxy.WatchedUpstreamEndpoints["db"] = map[structs.DiscoveryTarget]structs.CheckServiceNodes{
|
|
dbTarget_v1_dc1: TestUpstreamNodes(t),
|
|
dbTarget_v2_dc2: TestUpstreamNodesDC2(t),
|
|
}
|
|
default:
|
|
t.Fatalf("unexpected variation: %q", variation)
|
|
return nil
|
|
}
|
|
|
|
return snap
|
|
}
|
|
|
|
func TestConfigSnapshotMeshGateway(t testing.T) *ConfigSnapshot {
|
|
roots, _ := TestCerts(t)
|
|
return &ConfigSnapshot{
|
|
Kind: structs.ServiceKindMeshGateway,
|
|
Service: "mesh-gateway",
|
|
ProxyID: "mesh-gateway",
|
|
Address: "1.2.3.4",
|
|
Port: 8443,
|
|
Proxy: structs.ConnectProxyConfig{
|
|
Config: map[string]interface{}{},
|
|
},
|
|
TaggedAddresses: map[string]structs.ServiceAddress{
|
|
"lan": structs.ServiceAddress{
|
|
Address: "1.2.3.4",
|
|
Port: 8443,
|
|
},
|
|
"wan": structs.ServiceAddress{
|
|
Address: "198.18.0.1",
|
|
Port: 443,
|
|
},
|
|
},
|
|
Roots: roots,
|
|
Datacenter: "dc1",
|
|
MeshGateway: configSnapshotMeshGateway{
|
|
WatchedServices: map[string]context.CancelFunc{
|
|
"foo": nil,
|
|
"bar": nil,
|
|
},
|
|
WatchedDatacenters: map[string]context.CancelFunc{
|
|
"dc2": nil,
|
|
},
|
|
ServiceGroups: map[string]structs.CheckServiceNodes{
|
|
"foo": TestGatewayServiceGroupFooDC1(t),
|
|
"bar": TestGatewayServiceGroupBarDC1(t),
|
|
},
|
|
GatewayGroups: map[string]structs.CheckServiceNodes{
|
|
"dc2": TestGatewayNodesDC2(t),
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
// ControllableCacheType is a cache.Type that simulates a typical blocking RPC
|
|
// but lets us control the responses and when they are delivered easily.
|
|
type ControllableCacheType struct {
|
|
index uint64
|
|
value sync.Map
|
|
// Need a condvar to trigger all blocking requests (there might be multiple
|
|
// for same type due to background refresh and timing issues) when values
|
|
// change. Chans make it nondeterministic which one triggers or need extra
|
|
// locking to coordinate replacing after close etc.
|
|
triggerMu sync.Mutex
|
|
trigger *sync.Cond
|
|
blocking bool
|
|
lastReq atomic.Value
|
|
}
|
|
|
|
// NewControllableCacheType returns a cache.Type that can be controlled for
|
|
// testing.
|
|
func NewControllableCacheType(t testing.T) *ControllableCacheType {
|
|
c := &ControllableCacheType{
|
|
index: 5,
|
|
blocking: true,
|
|
}
|
|
c.trigger = sync.NewCond(&c.triggerMu)
|
|
return c
|
|
}
|
|
|
|
// Set sets the response value to be returned from subsequent cache gets for the
|
|
// type.
|
|
func (ct *ControllableCacheType) Set(key string, value interface{}) {
|
|
atomic.AddUint64(&ct.index, 1)
|
|
ct.value.Store(key, value)
|
|
ct.triggerMu.Lock()
|
|
ct.trigger.Broadcast()
|
|
ct.triggerMu.Unlock()
|
|
}
|
|
|
|
// Fetch implements cache.Type. It simulates blocking or non-blocking queries.
|
|
func (ct *ControllableCacheType) Fetch(opts cache.FetchOptions, req cache.Request) (cache.FetchResult, error) {
|
|
index := atomic.LoadUint64(&ct.index)
|
|
|
|
ct.lastReq.Store(req)
|
|
|
|
shouldBlock := ct.blocking && opts.MinIndex > 0 && opts.MinIndex == index
|
|
if shouldBlock {
|
|
// Wait for return to be triggered. We ignore timeouts based on opts.Timeout
|
|
// since in practice they will always be way longer than our tests run for
|
|
// and the caller can simulate timeout by triggering return without changing
|
|
// index or value.
|
|
ct.triggerMu.Lock()
|
|
ct.trigger.Wait()
|
|
ct.triggerMu.Unlock()
|
|
}
|
|
|
|
info := req.CacheInfo()
|
|
key := path.Join(info.Key, info.Datacenter) // omit token for testing purposes
|
|
|
|
// reload index as it probably got bumped
|
|
index = atomic.LoadUint64(&ct.index)
|
|
val, _ := ct.value.Load(key)
|
|
|
|
if err, ok := val.(error); ok {
|
|
return cache.FetchResult{
|
|
Value: nil,
|
|
Index: index,
|
|
}, err
|
|
}
|
|
return cache.FetchResult{
|
|
Value: val,
|
|
Index: index,
|
|
}, nil
|
|
}
|
|
|
|
// SupportsBlocking implements cache.Type
|
|
func (ct *ControllableCacheType) SupportsBlocking() bool {
|
|
return ct.blocking
|
|
}
|