mirror of https://github.com/ethereum/go-ethereum
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1369 lines
33 KiB
1369 lines
33 KiB
// Copyright 2018 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package stream
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/swarm/testutil"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/node"
|
|
"github.com/ethereum/go-ethereum/p2p/enode"
|
|
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
|
|
p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
|
|
"github.com/ethereum/go-ethereum/swarm/network"
|
|
"github.com/ethereum/go-ethereum/swarm/network/simulation"
|
|
"github.com/ethereum/go-ethereum/swarm/state"
|
|
"golang.org/x/crypto/sha3"
|
|
)
|
|
|
|
func TestStreamerSubscribe(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
stream := NewStream("foo", "", true)
|
|
err = streamer.Subscribe(tester.Nodes[0].ID(), stream, NewRange(0, 0), Top)
|
|
if err == nil || err.Error() != "stream foo not registered" {
|
|
t.Fatalf("Expected error %v, got %v", "stream foo not registered", err)
|
|
}
|
|
}
|
|
|
|
func TestStreamerRequestSubscription(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
stream := NewStream("foo", "", false)
|
|
err = streamer.RequestSubscription(tester.Nodes[0].ID(), stream, &Range{}, Top)
|
|
if err == nil || err.Error() != "stream foo not registered" {
|
|
t.Fatalf("Expected error %v, got %v", "stream foo not registered", err)
|
|
}
|
|
}
|
|
|
|
var (
|
|
hash0 = sha3.Sum256([]byte{0})
|
|
hash1 = sha3.Sum256([]byte{1})
|
|
hash2 = sha3.Sum256([]byte{2})
|
|
hashesTmp = append(hash0[:], hash1[:]...)
|
|
hashes = append(hashesTmp, hash2[:]...)
|
|
corruptHashes = append(hashes[:40])
|
|
)
|
|
|
|
type testClient struct {
|
|
t string
|
|
wait0 chan bool
|
|
wait2 chan bool
|
|
batchDone chan bool
|
|
receivedHashes map[string][]byte
|
|
}
|
|
|
|
func newTestClient(t string) *testClient {
|
|
return &testClient{
|
|
t: t,
|
|
wait0: make(chan bool),
|
|
wait2: make(chan bool),
|
|
batchDone: make(chan bool),
|
|
receivedHashes: make(map[string][]byte),
|
|
}
|
|
}
|
|
|
|
func (self *testClient) NeedData(ctx context.Context, hash []byte) func(context.Context) error {
|
|
self.receivedHashes[string(hash)] = hash
|
|
if bytes.Equal(hash, hash0[:]) {
|
|
return func(context.Context) error {
|
|
<-self.wait0
|
|
return nil
|
|
}
|
|
} else if bytes.Equal(hash, hash2[:]) {
|
|
return func(context.Context) error {
|
|
<-self.wait2
|
|
return nil
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (self *testClient) BatchDone(Stream, uint64, []byte, []byte) func() (*TakeoverProof, error) {
|
|
close(self.batchDone)
|
|
return nil
|
|
}
|
|
|
|
func (self *testClient) Close() {}
|
|
|
|
type testServer struct {
|
|
t string
|
|
sessionIndex uint64
|
|
}
|
|
|
|
func newTestServer(t string, sessionIndex uint64) *testServer {
|
|
return &testServer{
|
|
t: t,
|
|
sessionIndex: sessionIndex,
|
|
}
|
|
}
|
|
|
|
func (s *testServer) SessionIndex() (uint64, error) {
|
|
return s.sessionIndex, nil
|
|
}
|
|
|
|
func (self *testServer) SetNextBatch(from uint64, to uint64) ([]byte, uint64, uint64, *HandoverProof, error) {
|
|
return make([]byte, HashSize), from + 1, to + 1, nil, nil
|
|
}
|
|
|
|
func (self *testServer) GetData(context.Context, []byte) ([]byte, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func (self *testServer) Close() {
|
|
}
|
|
|
|
func TestStreamerDownstreamSubscribeUnsubscribeMsgExchange(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
streamer.RegisterClientFunc("foo", func(p *Peer, t string, live bool) (Client, error) {
|
|
return newTestClient(t), nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
stream := NewStream("foo", "", true)
|
|
err = streamer.Subscribe(node.ID(), stream, NewRange(5, 8), Top)
|
|
if err != nil {
|
|
t.Fatalf("Expected no error, got %v", err)
|
|
}
|
|
|
|
err = tester.TestExchanges(
|
|
p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
History: NewRange(5, 8),
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
},
|
|
// trigger OfferedHashesMsg to actually create the client
|
|
p2ptest.Exchange{
|
|
Label: "OfferedHashes message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: hashes,
|
|
From: 5,
|
|
To: 8,
|
|
Stream: stream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 2,
|
|
Msg: &WantedHashesMsg{
|
|
Stream: stream,
|
|
Want: []byte{5},
|
|
From: 9,
|
|
To: 0,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
},
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
err = streamer.Unsubscribe(node.ID(), stream)
|
|
if err != nil {
|
|
t.Fatalf("Expected no error, got %v", err)
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Unsubscribe message",
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 0,
|
|
Msg: &UnsubscribeMsg{
|
|
Stream: stream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestStreamerUpstreamSubscribeUnsubscribeMsgExchange(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
stream := NewStream("foo", "", false)
|
|
|
|
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
|
|
return newTestServer(t, 10), nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
History: NewRange(5, 8),
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
Stream: stream,
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: make([]byte, HashSize),
|
|
From: 6,
|
|
To: 9,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "unsubscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 0,
|
|
Msg: &UnsubscribeMsg{
|
|
Stream: stream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestStreamerUpstreamSubscribeUnsubscribeMsgExchangeLive(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
stream := NewStream("foo", "", true)
|
|
|
|
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
|
|
return newTestServer(t, 0), nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
Stream: stream,
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: make([]byte, HashSize),
|
|
From: 1,
|
|
To: 0,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "unsubscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 0,
|
|
Msg: &UnsubscribeMsg{
|
|
Stream: stream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestStreamerUpstreamSubscribeErrorMsgExchange(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
|
|
return newTestServer(t, 0), nil
|
|
})
|
|
|
|
stream := NewStream("bar", "", true)
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
History: NewRange(5, 8),
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 7,
|
|
Msg: &SubscribeErrorMsg{
|
|
Error: "stream bar not registered",
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestStreamerUpstreamSubscribeLiveAndHistory(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
stream := NewStream("foo", "", true)
|
|
|
|
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
|
|
return newTestServer(t, 10), nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
History: NewRange(5, 8),
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
Stream: NewStream("foo", "", false),
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: make([]byte, HashSize),
|
|
From: 6,
|
|
To: 9,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
Stream: stream,
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
From: 11,
|
|
To: 0,
|
|
Hashes: make([]byte, HashSize),
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestStreamerDownstreamCorruptHashesMsgExchange(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
stream := NewStream("foo", "", true)
|
|
|
|
var tc *testClient
|
|
|
|
streamer.RegisterClientFunc("foo", func(p *Peer, t string, live bool) (Client, error) {
|
|
tc = newTestClient(t)
|
|
return tc, nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
err = streamer.Subscribe(node.ID(), stream, NewRange(5, 8), Top)
|
|
if err != nil {
|
|
t.Fatalf("Expected no error, got %v", err)
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
History: NewRange(5, 8),
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
},
|
|
p2ptest.Exchange{
|
|
Label: "Corrupt offered hash message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: corruptHashes,
|
|
From: 5,
|
|
To: 8,
|
|
Stream: stream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
expectedError := errors.New("Message handler error: (msg code 1): error invalid hashes length (len: 40)")
|
|
if err := tester.TestDisconnected(&p2ptest.Disconnect{Peer: node.ID(), Error: expectedError}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestStreamerDownstreamOfferedHashesMsgExchange(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
stream := NewStream("foo", "", true)
|
|
|
|
var tc *testClient
|
|
|
|
streamer.RegisterClientFunc("foo", func(p *Peer, t string, live bool) (Client, error) {
|
|
tc = newTestClient(t)
|
|
return tc, nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
err = streamer.Subscribe(node.ID(), stream, NewRange(5, 8), Top)
|
|
if err != nil {
|
|
t.Fatalf("Expected no error, got %v", err)
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
History: NewRange(5, 8),
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
},
|
|
p2ptest.Exchange{
|
|
Label: "WantedHashes message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: hashes,
|
|
From: 5,
|
|
To: 8,
|
|
Stream: stream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 2,
|
|
Msg: &WantedHashesMsg{
|
|
Stream: stream,
|
|
Want: []byte{5},
|
|
From: 9,
|
|
To: 0,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if len(tc.receivedHashes) != 3 {
|
|
t.Fatalf("Expected number of received hashes %v, got %v", 3, len(tc.receivedHashes))
|
|
}
|
|
|
|
close(tc.wait0)
|
|
|
|
timeout := time.NewTimer(100 * time.Millisecond)
|
|
defer timeout.Stop()
|
|
|
|
select {
|
|
case <-tc.batchDone:
|
|
t.Fatal("batch done early")
|
|
case <-timeout.C:
|
|
}
|
|
|
|
close(tc.wait2)
|
|
|
|
timeout2 := time.NewTimer(10000 * time.Millisecond)
|
|
defer timeout2.Stop()
|
|
|
|
select {
|
|
case <-tc.batchDone:
|
|
case <-timeout2.C:
|
|
t.Fatal("timeout waiting batchdone call")
|
|
}
|
|
|
|
}
|
|
|
|
func TestStreamerRequestSubscriptionQuitMsgExchange(t *testing.T) {
|
|
tester, streamer, _, teardown, err := newStreamerTester(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
|
|
return newTestServer(t, 10), nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
stream := NewStream("foo", "", true)
|
|
err = streamer.RequestSubscription(node.ID(), stream, NewRange(5, 8), Top)
|
|
if err != nil {
|
|
t.Fatalf("Expected no error, got %v", err)
|
|
}
|
|
|
|
err = tester.TestExchanges(
|
|
p2ptest.Exchange{
|
|
Label: "RequestSubscription message",
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 8,
|
|
Msg: &RequestSubscriptionMsg{
|
|
Stream: stream,
|
|
History: NewRange(5, 8),
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
},
|
|
p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
History: NewRange(5, 8),
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
Stream: NewStream("foo", "", false),
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: make([]byte, HashSize),
|
|
From: 6,
|
|
To: 9,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
Stream: stream,
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
From: 11,
|
|
To: 0,
|
|
Hashes: make([]byte, HashSize),
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
},
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
err = streamer.Quit(node.ID(), stream)
|
|
if err != nil {
|
|
t.Fatalf("Expected no error, got %v", err)
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Quit message",
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 9,
|
|
Msg: &QuitMsg{
|
|
Stream: stream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
historyStream := getHistoryStream(stream)
|
|
|
|
err = streamer.Quit(node.ID(), historyStream)
|
|
if err != nil {
|
|
t.Fatalf("Expected no error, got %v", err)
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Quit message",
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 9,
|
|
Msg: &QuitMsg{
|
|
Stream: historyStream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// TestMaxPeerServersWithUnsubscribe creates a registry with a limited
|
|
// number of stream servers, and performs a test with subscriptions and
|
|
// unsubscriptions, checking if unsubscriptions will remove streams,
|
|
// leaving place for new streams.
|
|
func TestMaxPeerServersWithUnsubscribe(t *testing.T) {
|
|
var maxPeerServers = 6
|
|
tester, streamer, _, teardown, err := newStreamerTester(&RegistryOptions{
|
|
Retrieval: RetrievalDisabled,
|
|
Syncing: SyncingDisabled,
|
|
MaxPeerServers: maxPeerServers,
|
|
})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
|
|
return newTestServer(t, 0), nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
for i := 0; i < maxPeerServers+10; i++ {
|
|
stream := NewStream("foo", strconv.Itoa(i), true)
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
Stream: stream,
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: make([]byte, HashSize),
|
|
From: 1,
|
|
To: 0,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "unsubscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 0,
|
|
Msg: &UnsubscribeMsg{
|
|
Stream: stream,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestMaxPeerServersWithoutUnsubscribe creates a registry with a limited
|
|
// number of stream servers, and performs subscriptions to detect subscriptions
|
|
// error message exchange.
|
|
func TestMaxPeerServersWithoutUnsubscribe(t *testing.T) {
|
|
var maxPeerServers = 6
|
|
tester, streamer, _, teardown, err := newStreamerTester(&RegistryOptions{
|
|
MaxPeerServers: maxPeerServers,
|
|
})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
|
|
return newTestServer(t, 0), nil
|
|
})
|
|
|
|
node := tester.Nodes[0]
|
|
|
|
for i := 0; i < maxPeerServers+10; i++ {
|
|
stream := NewStream("foo", strconv.Itoa(i), true)
|
|
|
|
if i >= maxPeerServers {
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 7,
|
|
Msg: &SubscribeErrorMsg{
|
|
Error: ErrMaxPeerServers.Error(),
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
continue
|
|
}
|
|
|
|
err = tester.TestExchanges(p2ptest.Exchange{
|
|
Label: "Subscribe message",
|
|
Triggers: []p2ptest.Trigger{
|
|
{
|
|
Code: 4,
|
|
Msg: &SubscribeMsg{
|
|
Stream: stream,
|
|
Priority: Top,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
Expects: []p2ptest.Expect{
|
|
{
|
|
Code: 1,
|
|
Msg: &OfferedHashesMsg{
|
|
Stream: stream,
|
|
HandoverProof: &HandoverProof{
|
|
Handover: &Handover{},
|
|
},
|
|
Hashes: make([]byte, HashSize),
|
|
From: 1,
|
|
To: 0,
|
|
},
|
|
Peer: node.ID(),
|
|
},
|
|
},
|
|
})
|
|
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
//TestHasPriceImplementation is to check that the Registry has a
|
|
//`Price` interface implementation
|
|
func TestHasPriceImplementation(t *testing.T) {
|
|
_, r, _, teardown, err := newStreamerTester(&RegistryOptions{
|
|
Retrieval: RetrievalDisabled,
|
|
Syncing: SyncingDisabled,
|
|
})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardown()
|
|
|
|
if r.prices == nil {
|
|
t.Fatal("No prices implementation available for the stream protocol")
|
|
}
|
|
|
|
pricesInstance, ok := r.prices.(*StreamerPrices)
|
|
if !ok {
|
|
t.Fatal("`Registry` does not have the expected Prices instance")
|
|
}
|
|
price := pricesInstance.Price(&ChunkDeliveryMsgRetrieval{})
|
|
if price == nil || price.Value == 0 || price.Value != pricesInstance.getChunkDeliveryMsgRetrievalPrice() {
|
|
t.Fatal("No prices set for chunk delivery msg")
|
|
}
|
|
|
|
price = pricesInstance.Price(&RetrieveRequestMsg{})
|
|
if price == nil || price.Value == 0 || price.Value != pricesInstance.getRetrieveRequestMsgPrice() {
|
|
t.Fatal("No prices set for chunk delivery msg")
|
|
}
|
|
}
|
|
|
|
/*
|
|
TestRequestPeerSubscriptions is a unit test for stream's pull sync subscriptions.
|
|
|
|
The test does:
|
|
* assign each connected peer to a bin map
|
|
* build up a known kademlia in advance
|
|
* run the EachConn function, which returns supposed subscription bins
|
|
* store all supposed bins per peer in a map
|
|
* check that all peers have the expected subscriptions
|
|
|
|
This kad table and its peers are copied from network.TestKademliaCase1,
|
|
it represents an edge case but for the purpose of testing the
|
|
syncing subscriptions it is just fine.
|
|
|
|
Addresses used in this test are discovered as part of the simulation network
|
|
in higher level tests for streaming. They were generated randomly.
|
|
|
|
The resulting kademlia looks like this:
|
|
=========================================================================
|
|
Fri Dec 21 20:02:39 UTC 2018 KΛÐΞMLIΛ hive: queen's address: 7efef1
|
|
population: 12 (12), MinProxBinSize: 2, MinBinSize: 2, MaxBinSize: 4
|
|
000 2 8196 835f | 2 8196 (0) 835f (0)
|
|
001 2 2690 28f0 | 2 2690 (0) 28f0 (0)
|
|
002 2 4d72 4a45 | 2 4d72 (0) 4a45 (0)
|
|
003 1 646e | 1 646e (0)
|
|
004 3 769c 76d1 7656 | 3 769c (0) 76d1 (0) 7656 (0)
|
|
============ DEPTH: 5 ==========================================
|
|
005 1 7a48 | 1 7a48 (0)
|
|
006 1 7cbd | 1 7cbd (0)
|
|
007 0 | 0
|
|
008 0 | 0
|
|
009 0 | 0
|
|
010 0 | 0
|
|
011 0 | 0
|
|
012 0 | 0
|
|
013 0 | 0
|
|
014 0 | 0
|
|
015 0 | 0
|
|
=========================================================================
|
|
*/
|
|
func TestRequestPeerSubscriptions(t *testing.T) {
|
|
// the pivot address; this is the actual kademlia node
|
|
pivotAddr := "7efef1c41d77f843ad167be95f6660567eb8a4a59f39240000cce2e0d65baf8e"
|
|
|
|
// a map of bin number to addresses from the given kademlia
|
|
binMap := make(map[int][]string)
|
|
binMap[0] = []string{
|
|
"835fbbf1d16ba7347b6e2fc552d6e982148d29c624ea20383850df3c810fa8fc",
|
|
"81968a2d8fb39114342ee1da85254ec51e0608d7f0f6997c2a8354c260a71009",
|
|
}
|
|
binMap[1] = []string{
|
|
"28f0bc1b44658548d6e05dd16d4c2fe77f1da5d48b6774bc4263b045725d0c19",
|
|
"2690a910c33ee37b91eb6c4e0731d1d345e2dc3b46d308503a6e85bbc242c69e",
|
|
}
|
|
binMap[2] = []string{
|
|
"4a45f1fc63e1a9cb9dfa44c98da2f3d20c2923e5d75ff60b2db9d1bdb0c54d51",
|
|
"4d72a04ddeb851a68cd197ef9a92a3e2ff01fbbff638e64929dd1a9c2e150112",
|
|
}
|
|
binMap[3] = []string{
|
|
"646e9540c84f6a2f9cf6585d45a4c219573b4fd1b64a3c9a1386fc5cf98c0d4d",
|
|
}
|
|
binMap[4] = []string{
|
|
"7656caccdc79cd8d7ce66d415cc96a718e8271c62fb35746bfc2b49faf3eebf3",
|
|
"76d1e83c71ca246d042e37ff1db181f2776265fbcfdc890ce230bfa617c9c2f0",
|
|
"769ce86aa90b518b7ed382f9fdacfbed93574e18dc98fe6c342e4f9f409c2d5a",
|
|
}
|
|
binMap[5] = []string{
|
|
"7a48f75f8ca60487ae42d6f92b785581b40b91f2da551ae73d5eae46640e02e8",
|
|
}
|
|
binMap[6] = []string{
|
|
"7cbd42350bde8e18ae5b955b5450f8e2cef3419f92fbf5598160c60fd78619f0",
|
|
}
|
|
|
|
// create the pivot's kademlia
|
|
addr := common.FromHex(pivotAddr)
|
|
k := network.NewKademlia(addr, network.NewKadParams())
|
|
|
|
// construct the peers and the kademlia
|
|
for _, binaddrs := range binMap {
|
|
for _, a := range binaddrs {
|
|
addr := common.FromHex(a)
|
|
k.On(network.NewPeer(&network.BzzPeer{BzzAddr: &network.BzzAddr{OAddr: addr}}, k))
|
|
}
|
|
}
|
|
|
|
// TODO: check kad table is same
|
|
// currently k.String() prints date so it will never be the same :)
|
|
// --> implement JSON representation of kad table
|
|
log.Debug(k.String())
|
|
|
|
// simulate that we would do subscriptions: just store the bin numbers
|
|
fakeSubscriptions := make(map[string][]int)
|
|
//after the test, we need to reset the subscriptionFunc to the default
|
|
defer func() { subscriptionFunc = doRequestSubscription }()
|
|
// define the function which should run for each connection
|
|
// instead of doing real subscriptions, we just store the bin numbers
|
|
subscriptionFunc = func(r *Registry, p *network.Peer, bin uint8, subs map[enode.ID]map[Stream]struct{}) bool {
|
|
// get the peer ID
|
|
peerstr := fmt.Sprintf("%x", p.Over())
|
|
// create the array of bins per peer
|
|
if _, ok := fakeSubscriptions[peerstr]; !ok {
|
|
fakeSubscriptions[peerstr] = make([]int, 0)
|
|
}
|
|
// store the (fake) bin subscription
|
|
log.Debug(fmt.Sprintf("Adding fake subscription for peer %s with bin %d", peerstr, bin))
|
|
fakeSubscriptions[peerstr] = append(fakeSubscriptions[peerstr], int(bin))
|
|
return true
|
|
}
|
|
// create just a simple Registry object in order to be able to call...
|
|
r := &Registry{}
|
|
r.requestPeerSubscriptions(k, nil)
|
|
// calculate the kademlia depth
|
|
kdepth := k.NeighbourhoodDepth()
|
|
|
|
// now, check that all peers have the expected (fake) subscriptions
|
|
// iterate the bin map
|
|
for bin, peers := range binMap {
|
|
// for every peer...
|
|
for _, peer := range peers {
|
|
// ...get its (fake) subscriptions
|
|
fakeSubsForPeer := fakeSubscriptions[peer]
|
|
// if the peer's bin is shallower than the kademlia depth...
|
|
if bin < kdepth {
|
|
// (iterate all (fake) subscriptions)
|
|
for _, subbin := range fakeSubsForPeer {
|
|
// ...only the peer's bin should be "subscribed"
|
|
// (and thus have only one subscription)
|
|
if subbin != bin || len(fakeSubsForPeer) != 1 {
|
|
t.Fatalf("Did not get expected subscription for bin < depth; bin of peer %s: %d, subscription: %d", peer, bin, subbin)
|
|
}
|
|
}
|
|
} else { //if the peer's bin is equal or higher than the kademlia depth...
|
|
// (iterate all (fake) subscriptions)
|
|
for i, subbin := range fakeSubsForPeer {
|
|
// ...each bin from the peer's bin number up to k.MaxProxDisplay should be "subscribed"
|
|
// as we start from depth we can use the iteration index to check
|
|
if subbin != i+kdepth {
|
|
t.Fatalf("Did not get expected subscription for bin > depth; bin of peer %s: %d, subscription: %d", peer, bin, subbin)
|
|
}
|
|
// the last "subscription" should be k.MaxProxDisplay
|
|
if i == len(fakeSubsForPeer)-1 && subbin != k.MaxProxDisplay {
|
|
t.Fatalf("Expected last subscription to be: %d, but is: %d", k.MaxProxDisplay, subbin)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// print some output
|
|
for p, subs := range fakeSubscriptions {
|
|
log.Debug(fmt.Sprintf("Peer %s has the following fake subscriptions: ", p))
|
|
for _, bin := range subs {
|
|
log.Debug(fmt.Sprintf("%d,", bin))
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestGetSubscriptions is a unit test for the api.GetPeerSubscriptions() function
|
|
func TestGetSubscriptions(t *testing.T) {
|
|
// create an amount of dummy peers
|
|
testPeerCount := 8
|
|
// every peer will have this amount of dummy servers
|
|
testServerCount := 4
|
|
// the peerMap which will store this data for the registry
|
|
peerMap := make(map[enode.ID]*Peer)
|
|
// create the registry
|
|
r := &Registry{}
|
|
api := NewAPI(r)
|
|
// call once, at this point should be empty
|
|
regs := api.GetPeerSubscriptions()
|
|
if len(regs) != 0 {
|
|
t.Fatal("Expected subscription count to be 0, but it is not")
|
|
}
|
|
|
|
// now create a number of dummy servers for each node
|
|
for i := 0; i < testPeerCount; i++ {
|
|
addr := network.RandomAddr()
|
|
id := addr.ID()
|
|
p := &Peer{}
|
|
p.servers = make(map[Stream]*server)
|
|
for k := 0; k < testServerCount; k++ {
|
|
s := Stream{
|
|
Name: strconv.Itoa(k),
|
|
Key: "",
|
|
Live: false,
|
|
}
|
|
p.servers[s] = &server{}
|
|
}
|
|
peerMap[id] = p
|
|
}
|
|
r.peers = peerMap
|
|
|
|
// call the subscriptions again
|
|
regs = api.GetPeerSubscriptions()
|
|
// count how many (fake) subscriptions there are
|
|
cnt := 0
|
|
for _, reg := range regs {
|
|
for range reg {
|
|
cnt++
|
|
}
|
|
}
|
|
// check expected value
|
|
expectedCount := testPeerCount * testServerCount
|
|
if cnt != expectedCount {
|
|
t.Fatalf("Expected %d subscriptions, but got %d", expectedCount, cnt)
|
|
}
|
|
}
|
|
|
|
/*
|
|
TestGetSubscriptionsRPC sets up a simulation network of `nodeCount` nodes,
|
|
starts the simulation, waits for SyncUpdateDelay in order to kick off
|
|
stream registration, then tests that there are subscriptions.
|
|
*/
|
|
func TestGetSubscriptionsRPC(t *testing.T) {
|
|
|
|
if testutil.RaceEnabled && os.Getenv("TRAVIS") == "true" {
|
|
t.Skip("flaky with -race on Travis")
|
|
// Note: related ticket https://github.com/ethersphere/go-ethereum/issues/1234
|
|
}
|
|
|
|
// arbitrarily set to 4
|
|
nodeCount := 4
|
|
// set the syncUpdateDelay for sync registrations to start
|
|
syncUpdateDelay := 200 * time.Millisecond
|
|
// run with more nodes if `longrunning` flag is set
|
|
if *longrunning {
|
|
nodeCount = 64
|
|
syncUpdateDelay = 10 * time.Second
|
|
}
|
|
// holds the msg code for SubscribeMsg
|
|
var subscribeMsgCode uint64
|
|
var ok bool
|
|
var expectedMsgCount counter
|
|
|
|
// this channel signalizes that the expected amount of subscriptiosn is done
|
|
allSubscriptionsDone := make(chan struct{})
|
|
// after the test, we need to reset the subscriptionFunc to the default
|
|
defer func() { subscriptionFunc = doRequestSubscription }()
|
|
|
|
// we use this subscriptionFunc for this test: just increases count and calls the actual subscription
|
|
subscriptionFunc = func(r *Registry, p *network.Peer, bin uint8, subs map[enode.ID]map[Stream]struct{}) bool {
|
|
expectedMsgCount.inc()
|
|
doRequestSubscription(r, p, bin, subs)
|
|
return true
|
|
}
|
|
// create a standard sim
|
|
sim := simulation.New(map[string]simulation.ServiceFunc{
|
|
"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
|
|
addr, netStore, delivery, clean, err := newNetStoreAndDeliveryWithRequestFunc(ctx, bucket, dummyRequestFromPeers)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
// configure so that sync registrations actually happen
|
|
r := NewRegistry(addr.ID(), delivery, netStore, state.NewInmemoryStore(), &RegistryOptions{
|
|
Retrieval: RetrievalEnabled,
|
|
Syncing: SyncingAutoSubscribe, //enable sync registrations
|
|
SyncUpdateDelay: syncUpdateDelay,
|
|
}, nil)
|
|
|
|
// get the SubscribeMsg code
|
|
subscribeMsgCode, ok = r.GetSpec().GetCode(SubscribeMsg{})
|
|
if !ok {
|
|
t.Fatal("Message code for SubscribeMsg not found")
|
|
}
|
|
|
|
cleanup = func() {
|
|
r.Close()
|
|
clean()
|
|
}
|
|
|
|
return r, cleanup, nil
|
|
},
|
|
})
|
|
defer sim.Close()
|
|
|
|
ctx, cancelSimRun := context.WithTimeout(context.Background(), 3*time.Minute)
|
|
defer cancelSimRun()
|
|
|
|
// upload a snapshot
|
|
err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// setup the filter for SubscribeMsg
|
|
msgs := sim.PeerEvents(
|
|
context.Background(),
|
|
sim.NodeIDs(),
|
|
simulation.NewPeerEventsFilter().ReceivedMessages().Protocol("stream").MsgCode(subscribeMsgCode),
|
|
)
|
|
|
|
// strategy: listen to all SubscribeMsg events; after every event we wait
|
|
// if after `waitDuration` no more messages are being received, we assume the
|
|
// subscription phase has terminated!
|
|
|
|
// the loop in this go routine will either wait for new message events
|
|
// or times out after 1 second, which signals that we are not receiving
|
|
// any new subscriptions any more
|
|
go func() {
|
|
//for long running sims, waiting 1 sec will not be enough
|
|
waitDuration := time.Duration(nodeCount/16) * time.Second
|
|
if *longrunning {
|
|
waitDuration = syncUpdateDelay
|
|
}
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case m := <-msgs: // just reset the loop
|
|
if m.Error != nil {
|
|
log.Error("stream message", "err", m.Error)
|
|
continue
|
|
}
|
|
log.Trace("stream message", "node", m.NodeID, "peer", m.PeerID)
|
|
case <-time.After(waitDuration):
|
|
// one second passed, don't assume more subscriptions
|
|
allSubscriptionsDone <- struct{}{}
|
|
log.Info("All subscriptions received")
|
|
return
|
|
|
|
}
|
|
}
|
|
}()
|
|
|
|
//run the simulation
|
|
result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
|
|
log.Info("Simulation running")
|
|
nodes := sim.Net.Nodes
|
|
|
|
//wait until all subscriptions are done
|
|
select {
|
|
case <-allSubscriptionsDone:
|
|
case <-ctx.Done():
|
|
return errors.New("Context timed out")
|
|
}
|
|
|
|
log.Debug("Expected message count: ", "expectedMsgCount", expectedMsgCount.count())
|
|
//now iterate again, this time we call each node via RPC to get its subscriptions
|
|
realCount := 0
|
|
for _, node := range nodes {
|
|
//create rpc client
|
|
client, err := node.Client()
|
|
if err != nil {
|
|
return fmt.Errorf("create node 1 rpc client fail: %v", err)
|
|
}
|
|
|
|
//ask it for subscriptions
|
|
pstreams := make(map[string][]string)
|
|
err = client.Call(&pstreams, "stream_getPeerSubscriptions")
|
|
if err != nil {
|
|
return fmt.Errorf("client call stream_getPeerSubscriptions: %v", err)
|
|
}
|
|
//length of the subscriptions can not be smaller than number of peers
|
|
log.Debug("node subscriptions", "node", node.String())
|
|
for p, ps := range pstreams {
|
|
log.Debug("... with", "peer", p)
|
|
for _, s := range ps {
|
|
log.Debug(".......", "stream", s)
|
|
// each node also has subscriptions to RETRIEVE_REQUEST streams,
|
|
// we need to ignore those, we are only counting SYNC streams
|
|
if !strings.HasPrefix(s, "RETRIEVE_REQUEST") {
|
|
realCount++
|
|
}
|
|
}
|
|
}
|
|
log.Debug("All node streams counted", "realCount", realCount)
|
|
}
|
|
emc := expectedMsgCount.count()
|
|
if realCount != emc {
|
|
return fmt.Errorf("Real subscriptions and expected amount don't match; real: %d, expected: %d", realCount, emc)
|
|
}
|
|
return nil
|
|
})
|
|
if result.Error != nil {
|
|
t.Fatal(result.Error)
|
|
}
|
|
}
|
|
|
|
// counter is used to concurrently increment
|
|
// and read an integer value.
|
|
type counter struct {
|
|
v int
|
|
mu sync.RWMutex
|
|
}
|
|
|
|
// Increment the counter.
|
|
func (c *counter) inc() {
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
|
|
c.v++
|
|
}
|
|
|
|
// Read the counter value.
|
|
func (c *counter) count() int {
|
|
c.mu.RLock()
|
|
defer c.mu.RUnlock()
|
|
|
|
return c.v
|
|
}
|
|
|