mirror of
https://github.com/libp2p/go-libp2p.git
synced 2025-10-09 18:10:49 +08:00
462 lines
11 KiB
Go
462 lines
11 KiB
Go
package swarm_test
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"io"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/libp2p/go-libp2p-core/control"
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"github.com/libp2p/go-libp2p-core/network"
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"github.com/libp2p/go-libp2p-core/peer"
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"github.com/libp2p/go-libp2p-core/peerstore"
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. "github.com/libp2p/go-libp2p-swarm"
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. "github.com/libp2p/go-libp2p-swarm/testing"
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logging "github.com/ipfs/go-log"
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ma "github.com/multiformats/go-multiaddr"
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manet "github.com/multiformats/go-multiaddr/net"
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"github.com/stretchr/testify/require"
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)
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var log = logging.Logger("swarm_test")
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func EchoStreamHandler(stream network.Stream) {
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go func() {
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defer stream.Close()
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// pull out the ipfs conn
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c := stream.Conn()
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log.Infof("%s ponging to %s", c.LocalPeer(), c.RemotePeer())
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buf := make([]byte, 4)
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for {
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if _, err := stream.Read(buf); err != nil {
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if err != io.EOF {
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log.Error("ping receive error:", err)
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}
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return
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}
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if !bytes.Equal(buf, []byte("ping")) {
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log.Errorf("ping receive error: ping != %s %v", buf, buf)
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return
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}
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if _, err := stream.Write([]byte("pong")); err != nil {
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log.Error("pond send error:", err)
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return
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}
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}
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}()
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}
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func makeDialOnlySwarm(t *testing.T) *Swarm {
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swarm := GenSwarm(t, OptDialOnly)
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swarm.SetStreamHandler(EchoStreamHandler)
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return swarm
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}
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func makeSwarms(t *testing.T, num int, opts ...Option) []*Swarm {
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swarms := make([]*Swarm, 0, num)
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for i := 0; i < num; i++ {
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swarm := GenSwarm(t, opts...)
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swarm.SetStreamHandler(EchoStreamHandler)
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swarms = append(swarms, swarm)
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}
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return swarms
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}
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func connectSwarms(t *testing.T, ctx context.Context, swarms []*Swarm) {
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var wg sync.WaitGroup
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connect := func(s *Swarm, dst peer.ID, addr ma.Multiaddr) {
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// TODO: make a DialAddr func.
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s.Peerstore().AddAddr(dst, addr, peerstore.PermanentAddrTTL)
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if _, err := s.DialPeer(ctx, dst); err != nil {
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t.Fatal("error swarm dialing to peer", err)
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}
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wg.Done()
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}
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log.Info("Connecting swarms simultaneously.")
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for i, s1 := range swarms {
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for _, s2 := range swarms[i+1:] {
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wg.Add(1)
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connect(s1, s2.LocalPeer(), s2.ListenAddresses()[0]) // try the first.
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}
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}
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wg.Wait()
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for _, s := range swarms {
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log.Infof("%s swarm routing table: %s", s.LocalPeer(), s.Peers())
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}
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}
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func SubtestSwarm(t *testing.T, SwarmNum int, MsgNum int) {
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swarms := makeSwarms(t, SwarmNum, OptDisableReuseport)
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// connect everyone
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connectSwarms(t, context.Background(), swarms)
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// ping/pong
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for _, s1 := range swarms {
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log.Debugf("-------------------------------------------------------")
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log.Debugf("%s ping pong round", s1.LocalPeer())
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log.Debugf("-------------------------------------------------------")
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_, cancel := context.WithCancel(context.Background())
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got := map[peer.ID]int{}
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errChan := make(chan error, MsgNum*len(swarms))
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streamChan := make(chan network.Stream, MsgNum)
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// send out "ping" x MsgNum to every peer
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go func() {
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defer close(streamChan)
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var wg sync.WaitGroup
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send := func(p peer.ID) {
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defer wg.Done()
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// first, one stream per peer (nice)
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stream, err := s1.NewStream(context.Background(), p)
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if err != nil {
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errChan <- err
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return
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}
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// send out ping!
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for k := 0; k < MsgNum; k++ { // with k messages
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msg := "ping"
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log.Debugf("%s %s %s (%d)", s1.LocalPeer(), msg, p, k)
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if _, err := stream.Write([]byte(msg)); err != nil {
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errChan <- err
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continue
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}
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}
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// read it later
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streamChan <- stream
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}
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for _, s2 := range swarms {
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if s2.LocalPeer() == s1.LocalPeer() {
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continue // dont send to self...
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}
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wg.Add(1)
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go send(s2.LocalPeer())
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}
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wg.Wait()
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}()
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// receive "pong" x MsgNum from every peer
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go func() {
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defer close(errChan)
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count := 0
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countShouldBe := MsgNum * (len(swarms) - 1)
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for stream := range streamChan { // one per peer
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// get peer on the other side
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p := stream.Conn().RemotePeer()
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// receive pings
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msgCount := 0
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msg := make([]byte, 4)
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for k := 0; k < MsgNum; k++ { // with k messages
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// read from the stream
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if _, err := stream.Read(msg); err != nil {
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errChan <- err
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continue
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}
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if string(msg) != "pong" {
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errChan <- fmt.Errorf("unexpected message: %s", msg)
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continue
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}
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log.Debugf("%s %s %s (%d)", s1.LocalPeer(), msg, p, k)
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msgCount++
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}
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got[p] = msgCount
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count += msgCount
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stream.Close()
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}
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if count != countShouldBe {
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errChan <- fmt.Errorf("count mismatch: %d != %d", count, countShouldBe)
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}
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}()
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// check any errors (blocks till consumer is done)
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for err := range errChan {
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if err != nil {
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t.Error(err.Error())
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}
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}
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log.Debugf("%s got pongs", s1.LocalPeer())
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if (len(swarms) - 1) != len(got) {
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t.Errorf("got (%d) less messages than sent (%d).", len(got), len(swarms))
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}
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for p, n := range got {
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if n != MsgNum {
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t.Error("peer did not get all msgs", p, n, "/", MsgNum)
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}
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}
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cancel()
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<-time.After(10 * time.Millisecond)
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}
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for _, s := range swarms {
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s.Close()
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}
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}
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func TestSwarm(t *testing.T) {
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// t.Skip("skipping for another test")
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t.Parallel()
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// msgs := 1000
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msgs := 100
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swarms := 5
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SubtestSwarm(t, swarms, msgs)
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}
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func TestBasicSwarm(t *testing.T) {
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// t.Skip("skipping for another test")
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t.Parallel()
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msgs := 1
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swarms := 2
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SubtestSwarm(t, swarms, msgs)
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}
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func TestConnHandler(t *testing.T) {
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// t.Skip("skipping for another test")
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t.Parallel()
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ctx := context.Background()
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swarms := makeSwarms(t, 5)
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gotconn := make(chan struct{}, 10)
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swarms[0].SetConnHandler(func(conn network.Conn) {
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gotconn <- struct{}{}
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})
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connectSwarms(t, ctx, swarms)
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<-time.After(time.Millisecond)
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// should've gotten 5 by now.
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swarms[0].SetConnHandler(nil)
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expect := 4
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for i := 0; i < expect; i++ {
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select {
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case <-time.After(time.Second):
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t.Fatal("failed to get connections")
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case <-gotconn:
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}
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}
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select {
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case <-gotconn:
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t.Fatalf("should have connected to %d swarms, got an extra.", expect)
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default:
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}
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}
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func TestConnectionGating(t *testing.T) {
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ctx := context.Background()
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tcs := map[string]struct {
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p1Gater func(gater *MockConnectionGater) *MockConnectionGater
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p2Gater func(gater *MockConnectionGater) *MockConnectionGater
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p1ConnectednessToP2 network.Connectedness
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p2ConnectednessToP1 network.Connectedness
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isP1OutboundErr bool
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disableOnQUIC bool
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}{
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"no gating": {
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p1ConnectednessToP2: network.Connected,
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p2ConnectednessToP1: network.Connected,
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isP1OutboundErr: false,
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},
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"p1 gates outbound peer dial": {
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p1Gater: func(c *MockConnectionGater) *MockConnectionGater {
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c.PeerDial = func(p peer.ID) bool { return false }
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return c
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},
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p1ConnectednessToP2: network.NotConnected,
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p2ConnectednessToP1: network.NotConnected,
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isP1OutboundErr: true,
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},
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"p1 gates outbound addr dialing": {
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p1Gater: func(c *MockConnectionGater) *MockConnectionGater {
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c.Dial = func(p peer.ID, addr ma.Multiaddr) bool { return false }
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return c
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},
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p1ConnectednessToP2: network.NotConnected,
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p2ConnectednessToP1: network.NotConnected,
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isP1OutboundErr: true,
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},
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"p2 accepts inbound peer dial if outgoing dial is gated": {
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p2Gater: func(c *MockConnectionGater) *MockConnectionGater {
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c.Dial = func(peer.ID, ma.Multiaddr) bool { return false }
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return c
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},
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p1ConnectednessToP2: network.Connected,
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p2ConnectednessToP1: network.Connected,
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isP1OutboundErr: false,
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},
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"p2 gates inbound peer dial before securing": {
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p2Gater: func(c *MockConnectionGater) *MockConnectionGater {
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c.Accept = func(c network.ConnMultiaddrs) bool { return false }
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return c
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},
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p1ConnectednessToP2: network.NotConnected,
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p2ConnectednessToP1: network.NotConnected,
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isP1OutboundErr: true,
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// QUIC gates the connection after completion of the handshake
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disableOnQUIC: true,
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},
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"p2 gates inbound peer dial before multiplexing": {
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p1Gater: func(c *MockConnectionGater) *MockConnectionGater {
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c.Secured = func(network.Direction, peer.ID, network.ConnMultiaddrs) bool { return false }
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return c
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},
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p1ConnectednessToP2: network.NotConnected,
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p2ConnectednessToP1: network.NotConnected,
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isP1OutboundErr: true,
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},
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"p2 gates inbound peer dial after upgrading": {
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p1Gater: func(c *MockConnectionGater) *MockConnectionGater {
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c.Upgraded = func(c network.Conn) (bool, control.DisconnectReason) { return false, 0 }
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return c
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},
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p1ConnectednessToP2: network.NotConnected,
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p2ConnectednessToP1: network.NotConnected,
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isP1OutboundErr: true,
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},
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"p2 gates outbound dials": {
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p2Gater: func(c *MockConnectionGater) *MockConnectionGater {
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c.PeerDial = func(p peer.ID) bool { return false }
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return c
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},
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p1ConnectednessToP2: network.Connected,
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p2ConnectednessToP1: network.Connected,
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isP1OutboundErr: false,
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},
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}
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for n, tc := range tcs {
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for _, useQuic := range []bool{false, true} {
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trString := "TCP"
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optTransport := OptDisableQUIC
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if useQuic {
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if tc.disableOnQUIC {
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continue
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}
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trString = "QUIC"
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optTransport = OptDisableTCP
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}
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t.Run(fmt.Sprintf("%s %s", n, trString), func(t *testing.T) {
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p1Gater := DefaultMockConnectionGater()
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p2Gater := DefaultMockConnectionGater()
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if tc.p1Gater != nil {
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p1Gater = tc.p1Gater(p1Gater)
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}
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if tc.p2Gater != nil {
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p2Gater = tc.p2Gater(p2Gater)
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}
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sw1 := GenSwarm(t, OptConnGater(p1Gater), optTransport)
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sw2 := GenSwarm(t, OptConnGater(p2Gater), optTransport)
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p1 := sw1.LocalPeer()
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p2 := sw2.LocalPeer()
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sw1.Peerstore().AddAddr(p2, sw2.ListenAddresses()[0], peerstore.PermanentAddrTTL)
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// 1 -> 2
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_, err := sw1.DialPeer(ctx, p2)
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require.Equal(t, tc.isP1OutboundErr, err != nil, n)
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require.Equal(t, tc.p1ConnectednessToP2, sw1.Connectedness(p2), n)
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require.Eventually(t, func() bool {
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return tc.p2ConnectednessToP1 == sw2.Connectedness(p1)
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}, 2*time.Second, 100*time.Millisecond, n)
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})
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}
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}
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}
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func TestNoDial(t *testing.T) {
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swarms := makeSwarms(t, 2)
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_, err := swarms[0].NewStream(network.WithNoDial(context.Background(), "swarm test"), swarms[1].LocalPeer())
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if err != network.ErrNoConn {
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t.Fatal("should have failed with ErrNoConn")
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}
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}
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func TestCloseWithOpenStreams(t *testing.T) {
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ctx := context.Background()
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swarms := makeSwarms(t, 2)
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connectSwarms(t, ctx, swarms)
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s, err := swarms[0].NewStream(ctx, swarms[1].LocalPeer())
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require.NoError(t, err)
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defer s.Close()
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// close swarm before stream.
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require.NoError(t, swarms[0].Close())
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}
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func TestTypedNilConn(t *testing.T) {
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s := GenSwarm(t)
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defer s.Close()
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// We can't dial ourselves.
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c, err := s.DialPeer(context.Background(), s.LocalPeer())
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require.Error(t, err)
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// If we fail to dial, the connection should be nil.
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require.Nil(t, c)
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}
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func TestPreventDialListenAddr(t *testing.T) {
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s := GenSwarm(t, OptDialOnly)
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if err := s.Listen(ma.StringCast("/ip4/0.0.0.0/udp/0/quic")); err != nil {
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t.Fatal(err)
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}
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addrs, err := s.InterfaceListenAddresses()
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if err != nil {
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t.Fatal(err)
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}
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var addr ma.Multiaddr
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for _, a := range addrs {
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_, s, err := manet.DialArgs(a)
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if err != nil {
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t.Fatal(err)
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}
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if strings.Split(s, ":")[0] == "127.0.0.1" {
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addr = a
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break
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}
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}
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remote := peer.ID("foobar")
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s.Peerstore().AddAddr(remote, addr, time.Hour)
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_, err = s.DialPeer(context.Background(), remote)
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if !errors.Is(err, ErrNoGoodAddresses) {
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t.Fatal("expected dial to fail: %w", err)
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}
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}
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