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package p2p
import (
"fmt"
"io/ioutil"
"math/rand"
"os"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
crypto "github.com/tendermint/go-crypto"
wire "github.com/tendermint/go-wire"
cmn "github.com/tendermint/tmlibs/common"
"github.com/tendermint/tmlibs/log"
)
func TestPEXReactorBasic(t *testing.T) {
assert, require := assert.New(t), require.New(t)
dir, err := ioutil.TempDir("", "pex_reactor")
require.Nil(err)
defer os.RemoveAll(dir) // nolint: errcheck
book := NewAddrBook(dir+"addrbook.json", true)
book.SetLogger(log.TestingLogger())
r := NewPEXReactor(book)
r.SetLogger(log.TestingLogger())
assert.NotNil(r)
assert.NotEmpty(r.GetChannels())
}
func TestPEXReactorAddRemovePeer(t *testing.T) {
assert, require := assert.New(t), require.New(t)
dir, err := ioutil.TempDir("", "pex_reactor")
require.Nil(err)
defer os.RemoveAll(dir) // nolint: errcheck
book := NewAddrBook(dir+"addrbook.json", true)
book.SetLogger(log.TestingLogger())
r := NewPEXReactor(book)
r.SetLogger(log.TestingLogger())
size := book.Size()
peer := createRandomPeer(false)
r.AddPeer(peer)
assert.Equal(size+1, book.Size())
r.RemovePeer(peer, "peer not available")
assert.Equal(size+1, book.Size())
outboundPeer := createRandomPeer(true)
r.AddPeer(outboundPeer)
assert.Equal(size+1, book.Size(), "outbound peers should not be added to the address book")
r.RemovePeer(outboundPeer, "peer not available")
assert.Equal(size+1, book.Size())
}
func TestPEXReactorRunning(t *testing.T) {
N := 3
switches := make([]*Switch, N)
dir, err := ioutil.TempDir("", "pex_reactor")
require.Nil(t, err)
defer os.RemoveAll(dir) // nolint: errcheck
book := NewAddrBook(dir+"addrbook.json", false)
book.SetLogger(log.TestingLogger())
// create switches
for i := 0; i < N; i++ {
switches[i] = makeSwitch(config, i, "127.0.0.1", "123.123.123", func(i int, sw *Switch) *Switch {
sw.SetLogger(log.TestingLogger().With("switch", i))
r := NewPEXReactor(book)
r.SetLogger(log.TestingLogger())
r.SetEnsurePeersPeriod(250 * time.Millisecond)
sw.AddReactor("pex", r)
return sw
})
}
// fill the address book and add listeners
for _, s := range switches {
addr, _ := NewNetAddressString(s.NodeInfo().ListenAddr)
book.AddAddress(addr, addr)
s.AddListener(NewDefaultListener("tcp", s.NodeInfo().ListenAddr, true, log.TestingLogger()))
}
// start switches
for _, s := range switches {
err := s.Start() // start switch and reactors
require.Nil(t, err)
}
assertSomePeersWithTimeout(t, switches, 10*time.Millisecond, 10*time.Second)
// stop them
for _, s := range switches {
s.Stop()
}
}
func assertSomePeersWithTimeout(t *testing.T, switches []*Switch, checkPeriod, timeout time.Duration) {
ticker := time.NewTicker(checkPeriod)
for {
select {
case <-ticker.C:
// check peers are connected
allGood := true
for _, s := range switches {
outbound, inbound, _ := s.NumPeers()
if outbound+inbound == 0 {
allGood = false
}
}
if allGood {
return
}
case <-time.After(timeout):
numPeersStr := ""
for i, s := range switches {
outbound, inbound, _ := s.NumPeers()
numPeersStr += fmt.Sprintf("%d => {outbound: %d, inbound: %d}, ", i, outbound, inbound)
}
t.Errorf("expected all switches to be connected to at least one peer (switches: %s)", numPeersStr)
}
}
}
func TestPEXReactorReceive(t *testing.T) {
assert, require := assert.New(t), require.New(t)
dir, err := ioutil.TempDir("", "pex_reactor")
require.Nil(err)
defer os.RemoveAll(dir) // nolint: errcheck
book := NewAddrBook(dir+"addrbook.json", false)
book.SetLogger(log.TestingLogger())
r := NewPEXReactor(book)
r.SetLogger(log.TestingLogger())
peer := createRandomPeer(false)
size := book.Size()
netAddr, _ := NewNetAddressString(peer.NodeInfo().ListenAddr)
addrs := []*NetAddress{netAddr}
msg := wire.BinaryBytes(struct{ PexMessage }{&pexAddrsMessage{Addrs: addrs}})
r.Receive(PexChannel, peer, msg)
assert.Equal(size+1, book.Size())
msg = wire.BinaryBytes(struct{ PexMessage }{&pexRequestMessage{}})
r.Receive(PexChannel, peer, msg)
}
func TestPEXReactorAbuseFromPeer(t *testing.T) {
assert, require := assert.New(t), require.New(t)
dir, err := ioutil.TempDir("", "pex_reactor")
require.Nil(err)
defer os.RemoveAll(dir) // nolint: errcheck
book := NewAddrBook(dir+"addrbook.json", true)
book.SetLogger(log.TestingLogger())
r := NewPEXReactor(book)
r.SetLogger(log.TestingLogger())
r.SetMaxMsgCountByPeer(5)
peer := createRandomPeer(false)
msg := wire.BinaryBytes(struct{ PexMessage }{&pexRequestMessage{}})
for i := 0; i < 10; i++ {
r.Receive(PexChannel, peer, msg)
}
assert.True(r.ReachedMaxMsgCountForPeer(peer.NodeInfo().ListenAddr))
}
func createRoutableAddr() (addr string, netAddr *NetAddress) {
for {
addr = cmn.Fmt("%v.%v.%v.%v:46656", rand.Int()%256, rand.Int()%256, rand.Int()%256, rand.Int()%256)
netAddr, _ = NewNetAddressString(addr)
if netAddr.Routable() {
break
}
}
return
}
func createRandomPeer(outbound bool) *peer {
addr, netAddr := createRoutableAddr()
p := &peer{
nodeInfo: &NodeInfo{
ListenAddr: addr,
RemoteAddr: netAddr.String(),
PubKey: crypto.GenPrivKeyEd25519().Wrap().PubKey(),
},
outbound: outbound,
mconn: &MConnection{},
}
p.SetLogger(log.TestingLogger().With("peer", addr))
return p
}