package p2p import ( "bytes" "fmt" "net" "sync" "testing" "time" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" crypto "github.com/tendermint/go-crypto" wire "github.com/tendermint/go-wire" "github.com/tendermint/tmlibs/log" cfg "github.com/tendermint/tendermint/config" ) var ( config *cfg.P2PConfig ) func init() { config = cfg.DefaultP2PConfig() config.PexReactor = true } type PeerMessage struct { PeerKey string Bytes []byte Counter int } type TestReactor struct { BaseReactor mtx sync.Mutex channels []*ChannelDescriptor peersAdded []Peer peersRemoved []Peer logMessages bool msgsCounter int msgsReceived map[byte][]PeerMessage } func NewTestReactor(channels []*ChannelDescriptor, logMessages bool) *TestReactor { tr := &TestReactor{ channels: channels, logMessages: logMessages, msgsReceived: make(map[byte][]PeerMessage), } tr.BaseReactor = *NewBaseReactor("TestReactor", tr) tr.SetLogger(log.TestingLogger()) return tr } func (tr *TestReactor) GetChannels() []*ChannelDescriptor { return tr.channels } func (tr *TestReactor) AddPeer(peer Peer) { tr.mtx.Lock() defer tr.mtx.Unlock() tr.peersAdded = append(tr.peersAdded, peer) } func (tr *TestReactor) RemovePeer(peer Peer, reason interface{}) { tr.mtx.Lock() defer tr.mtx.Unlock() tr.peersRemoved = append(tr.peersRemoved, peer) } func (tr *TestReactor) Receive(chID byte, peer Peer, msgBytes []byte) { if tr.logMessages { tr.mtx.Lock() defer tr.mtx.Unlock() //fmt.Printf("Received: %X, %X\n", chID, msgBytes) tr.msgsReceived[chID] = append(tr.msgsReceived[chID], PeerMessage{peer.Key(), msgBytes, tr.msgsCounter}) tr.msgsCounter++ } } func (tr *TestReactor) getMsgs(chID byte) []PeerMessage { tr.mtx.Lock() defer tr.mtx.Unlock() return tr.msgsReceived[chID] } //----------------------------------------------------------------------------- // convenience method for creating two switches connected to each other. // XXX: note this uses net.Pipe and not a proper TCP conn func makeSwitchPair(t testing.TB, initSwitch func(int, *Switch) *Switch) (*Switch, *Switch) { // Create two switches that will be interconnected. switches := MakeConnectedSwitches(config, 2, initSwitch, Connect2Switches) return switches[0], switches[1] } func initSwitchFunc(i int, sw *Switch) *Switch { // Make two reactors of two channels each sw.AddReactor("foo", NewTestReactor([]*ChannelDescriptor{ {ID: byte(0x00), Priority: 10}, {ID: byte(0x01), Priority: 10}, }, true)) sw.AddReactor("bar", NewTestReactor([]*ChannelDescriptor{ {ID: byte(0x02), Priority: 10}, {ID: byte(0x03), Priority: 10}, }, true)) return sw } func TestSwitches(t *testing.T) { s1, s2 := makeSwitchPair(t, initSwitchFunc) defer s1.Stop() defer s2.Stop() if s1.Peers().Size() != 1 { t.Errorf("Expected exactly 1 peer in s1, got %v", s1.Peers().Size()) } if s2.Peers().Size() != 1 { t.Errorf("Expected exactly 1 peer in s2, got %v", s2.Peers().Size()) } // Lets send some messages ch0Msg := "channel zero" ch1Msg := "channel foo" ch2Msg := "channel bar" s1.Broadcast(byte(0x00), ch0Msg) s1.Broadcast(byte(0x01), ch1Msg) s1.Broadcast(byte(0x02), ch2Msg) assertMsgReceivedWithTimeout(t, ch0Msg, byte(0x00), s2.Reactor("foo").(*TestReactor), 10*time.Millisecond, 5*time.Second) assertMsgReceivedWithTimeout(t, ch1Msg, byte(0x01), s2.Reactor("foo").(*TestReactor), 10*time.Millisecond, 5*time.Second) assertMsgReceivedWithTimeout(t, ch2Msg, byte(0x02), s2.Reactor("bar").(*TestReactor), 10*time.Millisecond, 5*time.Second) } func assertMsgReceivedWithTimeout(t *testing.T, msg string, channel byte, reactor *TestReactor, checkPeriod, timeout time.Duration) { ticker := time.NewTicker(checkPeriod) for { select { case <-ticker.C: msgs := reactor.getMsgs(channel) if len(msgs) > 0 { if !bytes.Equal(msgs[0].Bytes, wire.BinaryBytes(msg)) { t.Fatalf("Unexpected message bytes. Wanted: %X, Got: %X", wire.BinaryBytes(msg), msgs[0].Bytes) } return } case <-time.After(timeout): t.Fatalf("Expected to have received 1 message in channel #%v, got zero", channel) } } } func TestConnAddrFilter(t *testing.T) { s1 := makeSwitch(config, 1, "testing", "123.123.123", initSwitchFunc) s2 := makeSwitch(config, 1, "testing", "123.123.123", initSwitchFunc) defer s1.Stop() defer s2.Stop() c1, c2 := netPipe() s1.SetAddrFilter(func(addr net.Addr) error { if addr.String() == c1.RemoteAddr().String() { return fmt.Errorf("Error: pipe is blacklisted") } return nil }) // connect to good peer go func() { err := s1.addPeerWithConnection(c1) assert.NotNil(t, err, "expected err") }() go func() { err := s2.addPeerWithConnection(c2) assert.NotNil(t, err, "expected err") }() assertNoPeersAfterTimeout(t, s1, 400*time.Millisecond) assertNoPeersAfterTimeout(t, s2, 400*time.Millisecond) } func assertNoPeersAfterTimeout(t *testing.T, sw *Switch, timeout time.Duration) { time.Sleep(timeout) if sw.Peers().Size() != 0 { t.Fatalf("Expected %v to not connect to some peers, got %d", sw, sw.Peers().Size()) } } func TestConnPubKeyFilter(t *testing.T) { s1 := makeSwitch(config, 1, "testing", "123.123.123", initSwitchFunc) s2 := makeSwitch(config, 1, "testing", "123.123.123", initSwitchFunc) defer s1.Stop() defer s2.Stop() c1, c2 := netPipe() // set pubkey filter s1.SetPubKeyFilter(func(pubkey crypto.PubKeyEd25519) error { if bytes.Equal(pubkey.Bytes(), s2.nodeInfo.PubKey.Bytes()) { return fmt.Errorf("Error: pipe is blacklisted") } return nil }) // connect to good peer go func() { err := s1.addPeerWithConnection(c1) assert.NotNil(t, err, "expected error") }() go func() { err := s2.addPeerWithConnection(c2) assert.NotNil(t, err, "expected error") }() assertNoPeersAfterTimeout(t, s1, 400*time.Millisecond) assertNoPeersAfterTimeout(t, s2, 400*time.Millisecond) } func TestSwitchStopsNonPersistentPeerOnError(t *testing.T) { assert, require := assert.New(t), require.New(t) sw := makeSwitch(config, 1, "testing", "123.123.123", initSwitchFunc) err := sw.Start() if err != nil { t.Error(err) } defer sw.Stop() // simulate remote peer rp := &remotePeer{PrivKey: crypto.GenPrivKeyEd25519(), Config: DefaultPeerConfig()} rp.Start() defer rp.Stop() peer, err := newOutboundPeer(rp.Addr(), sw.reactorsByCh, sw.chDescs, sw.StopPeerForError, sw.nodePrivKey, DefaultPeerConfig()) require.Nil(err) err = sw.addPeer(peer) require.Nil(err) // simulate failure by closing connection peer.CloseConn() assertNoPeersAfterTimeout(t, sw, 100*time.Millisecond) assert.False(peer.IsRunning()) } func TestSwitchReconnectsToPersistentPeer(t *testing.T) { assert, require := assert.New(t), require.New(t) sw := makeSwitch(config, 1, "testing", "123.123.123", initSwitchFunc) err := sw.Start() if err != nil { t.Error(err) } defer sw.Stop() // simulate remote peer rp := &remotePeer{PrivKey: crypto.GenPrivKeyEd25519(), Config: DefaultPeerConfig()} rp.Start() defer rp.Stop() peer, err := newOutboundPeer(rp.Addr(), sw.reactorsByCh, sw.chDescs, sw.StopPeerForError, sw.nodePrivKey, DefaultPeerConfig()) peer.makePersistent() require.Nil(err) err = sw.addPeer(peer) require.Nil(err) // simulate failure by closing connection peer.CloseConn() // TODO: remove sleep, detect the disconnection, wait for reconnect npeers := sw.Peers().Size() for i := 0; i < 20; i++ { time.Sleep(250 * time.Millisecond) npeers = sw.Peers().Size() if npeers > 0 { break } } assert.NotZero(npeers) assert.False(peer.IsRunning()) } func TestSwitchFullConnectivity(t *testing.T) { switches := MakeConnectedSwitches(config, 3, initSwitchFunc, Connect2Switches) defer func() { for _, sw := range switches { sw.Stop() } }() for i, sw := range switches { if sw.Peers().Size() != 2 { t.Fatalf("Expected each switch to be connected to 2 other, but %d switch only connected to %d", sw.Peers().Size(), i) } } } func BenchmarkSwitches(b *testing.B) { b.StopTimer() s1, s2 := makeSwitchPair(b, func(i int, sw *Switch) *Switch { // Make bar reactors of bar channels each sw.AddReactor("foo", NewTestReactor([]*ChannelDescriptor{ {ID: byte(0x00), Priority: 10}, {ID: byte(0x01), Priority: 10}, }, false)) sw.AddReactor("bar", NewTestReactor([]*ChannelDescriptor{ {ID: byte(0x02), Priority: 10}, {ID: byte(0x03), Priority: 10}, }, false)) return sw }) defer s1.Stop() defer s2.Stop() // Allow time for goroutines to boot up time.Sleep(1 * time.Second) b.StartTimer() numSuccess, numFailure := 0, 0 // Send random message from foo channel to another for i := 0; i < b.N; i++ { chID := byte(i % 4) successChan := s1.Broadcast(chID, "test data") for s := range successChan { if s { numSuccess++ } else { numFailure++ } } } b.Logf("success: %v, failure: %v", numSuccess, numFailure) // Allow everything to flush before stopping switches & closing connections. b.StopTimer() }