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tendermint/p2p/switch_test.go

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package p2p
import (
"bytes"
"fmt"
"net"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/tendermint/tendermint/crypto/ed25519"
"github.com/tendermint/tendermint/libs/log"
"github.com/tendermint/tendermint/config"
"github.com/tendermint/tendermint/p2p/conn"
)
var (
cfg *config.P2PConfig
)
func init() {
cfg = config.DefaultP2PConfig()
cfg.PexReactor = true
cfg.AllowDuplicateIP = true
}
type PeerMessage struct {
PeerID ID
Bytes []byte
Counter int
}
type TestReactor struct {
BaseReactor
mtx sync.Mutex
channels []*conn.ChannelDescriptor
logMessages bool
msgsCounter int
msgsReceived map[byte][]PeerMessage
}
func NewTestReactor(channels []*conn.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() []*conn.ChannelDescriptor {
return tr.channels
}
func (tr *TestReactor) AddPeer(peer Peer) {}
func (tr *TestReactor) RemovePeer(peer Peer, reason interface{}) {}
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.ID(), 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(cfg, 2, initSwitch, Connect2Switches)
return switches[0], switches[1]
}
func initSwitchFunc(i int, sw *Switch) *Switch {
sw.SetAddrBook(&addrBookMock{
addrs: make(map[string]struct{}),
ourAddrs: make(map[string]struct{})})
// Make two reactors of two channels each
sw.AddReactor("foo", NewTestReactor([]*conn.ChannelDescriptor{
{ID: byte(0x00), Priority: 10},
{ID: byte(0x01), Priority: 10},
}, true))
sw.AddReactor("bar", NewTestReactor([]*conn.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 := []byte("channel zero")
ch1Msg := []byte("channel foo")
ch2Msg := []byte("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, msgBytes []byte, 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, msgBytes) {
t.Fatalf("Unexpected message bytes. Wanted: %X, Got: %X", msgBytes, 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(cfg, 1, "testing", "123.123.123", initSwitchFunc)
s2 := MakeSwitch(cfg, 1, "testing", "123.123.123", initSwitchFunc)
defer s1.Stop()
defer s2.Stop()
c1, c2 := conn.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 TestSwitchFiltersOutItself(t *testing.T) {
s1 := MakeSwitch(cfg, 1, "127.0.0.1", "123.123.123", initSwitchFunc)
// addr := s1.NodeInfo().NetAddress()
// // add ourselves like we do in node.go#427
// s1.addrBook.AddOurAddress(addr)
// simulate s1 having a public IP by creating a remote peer with the same ID
rp := &remotePeer{PrivKey: s1.nodeKey.PrivKey, Config: cfg}
rp.Start()
// addr should be rejected in addPeer based on the same ID
err := s1.DialPeerWithAddress(rp.Addr(), false)
if assert.Error(t, err) {
assert.Equal(t, ErrSwitchConnectToSelf{rp.Addr()}.Error(), err.Error())
}
assert.True(t, s1.addrBook.OurAddress(rp.Addr()))
assert.False(t, s1.addrBook.HasAddress(rp.Addr()))
rp.Stop()
assertNoPeersAfterTimeout(t, s1, 100*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 TestConnIDFilter(t *testing.T) {
s1 := MakeSwitch(cfg, 1, "testing", "123.123.123", initSwitchFunc)
s2 := MakeSwitch(cfg, 1, "testing", "123.123.123", initSwitchFunc)
defer s1.Stop()
defer s2.Stop()
c1, c2 := conn.NetPipe()
s1.SetIDFilter(func(id ID) error {
if id == s2.nodeInfo.ID {
return fmt.Errorf("Error: pipe is blacklisted")
}
return nil
})
s2.SetIDFilter(func(id ID) error {
if id == s1.nodeInfo.ID {
return fmt.Errorf("Error: pipe is blacklisted")
}
return nil
})
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(cfg, 1, "testing", "123.123.123", initSwitchFunc)
err := sw.Start()
if err != nil {
t.Error(err)
}
defer sw.Stop()
// simulate remote peer
rp := &remotePeer{PrivKey: ed25519.GenPrivKeyEd25519(), Config: cfg}
rp.Start()
defer rp.Stop()
pc, err := newOutboundPeerConn(rp.Addr(), cfg, false, sw.nodeKey.PrivKey)
require.Nil(err)
err = sw.addPeer(pc)
require.Nil(err)
peer := sw.Peers().Get(rp.ID())
require.NotNil(peer)
// simulate failure by closing connection
pc.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(cfg, 1, "testing", "123.123.123", initSwitchFunc)
err := sw.Start()
if err != nil {
t.Error(err)
}
defer sw.Stop()
// simulate remote peer
rp := &remotePeer{PrivKey: ed25519.GenPrivKeyEd25519(), Config: cfg}
rp.Start()
defer rp.Stop()
pc, err := newOutboundPeerConn(rp.Addr(), cfg, true, sw.nodeKey.PrivKey)
// sw.reactorsByCh, sw.chDescs, sw.StopPeerForError, sw.nodeKey.PrivKey,
require.Nil(err)
require.Nil(sw.addPeer(pc))
peer := sw.Peers().Get(rp.ID())
require.NotNil(peer)
// simulate failure by closing connection
pc.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())
// simulate another remote peer
rp = &remotePeer{
PrivKey: ed25519.GenPrivKeyEd25519(),
Config: cfg,
// Use different interface to prevent duplicate IP filter, this will break
// beyond two peers.
listenAddr: "127.0.0.1:0",
}
rp.Start()
defer rp.Stop()
// simulate first time dial failure
conf := config.DefaultP2PConfig()
conf.TestDialFail = true
err = sw.addOutboundPeerWithConfig(rp.Addr(), conf, true)
require.NotNil(err)
// DialPeerWithAddres - sw.peerConfig resets the dialer
// TODO: same as above
for i := 0; i < 20; i++ {
time.Sleep(250 * time.Millisecond)
npeers = sw.Peers().Size()
if npeers > 1 {
break
}
}
assert.EqualValues(2, npeers)
}
func TestSwitchFullConnectivity(t *testing.T) {
switches := MakeConnectedSwitches(cfg, 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 BenchmarkSwitchBroadcast(b *testing.B) {
s1, s2 := MakeSwitchPair(b, func(i int, sw *Switch) *Switch {
// Make bar reactors of bar channels each
sw.AddReactor("foo", NewTestReactor([]*conn.ChannelDescriptor{
{ID: byte(0x00), Priority: 10},
{ID: byte(0x01), Priority: 10},
}, false))
sw.AddReactor("bar", NewTestReactor([]*conn.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.ResetTimer()
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, []byte("test data"))
for s := range successChan {
if s {
numSuccess++
} else {
numFailure++
}
}
}
b.Logf("success: %v, failure: %v", numSuccess, numFailure)
}
type addrBookMock struct {
addrs map[string]struct{}
ourAddrs map[string]struct{}
}
var _ AddrBook = (*addrBookMock)(nil)
func (book *addrBookMock) AddAddress(addr *NetAddress, src *NetAddress) error {
book.addrs[addr.String()] = struct{}{}
return nil
}
func (book *addrBookMock) AddOurAddress(addr *NetAddress) { book.ourAddrs[addr.String()] = struct{}{} }
func (book *addrBookMock) OurAddress(addr *NetAddress) bool {
_, ok := book.ourAddrs[addr.String()]
return ok
}
func (book *addrBookMock) MarkGood(*NetAddress) {}
func (book *addrBookMock) HasAddress(addr *NetAddress) bool {
_, ok := book.addrs[addr.String()]
return ok
}
func (book *addrBookMock) RemoveAddress(addr *NetAddress) {
delete(book.addrs, addr.String())
}
func (book *addrBookMock) Save() {}