autorelay test

p2p/host/relay/autorelay_test.go

+package relay_test
+
+import (
+	"context"
+	"net"
+	"sync"
+	"testing"
+	"time"
+
+	libp2p "github.com/libp2p/go-libp2p"
+	config "github.com/libp2p/go-libp2p/config"
+	relay "github.com/libp2p/go-libp2p/p2p/host/relay"
+
+	ggio "github.com/gogo/protobuf/io"
+	cid "github.com/ipfs/go-cid"
+	autonat "github.com/libp2p/go-libp2p-autonat"
+	autonatpb "github.com/libp2p/go-libp2p-autonat/pb"
+	circuit "github.com/libp2p/go-libp2p-circuit"
+	host "github.com/libp2p/go-libp2p-host"
+	inet "github.com/libp2p/go-libp2p-net"
+	peer "github.com/libp2p/go-libp2p-peer"
+	pstore "github.com/libp2p/go-libp2p-peerstore"
+	routing "github.com/libp2p/go-libp2p-routing"
+	manet "github.com/multiformats/go-multiaddr-net"
+)
+
+// test specific parameters
+func init() {
+	autonat.AutoNATIdentifyDelay = 10 * time.Millisecond
+	autonat.AutoNATBootDelay = 1 * time.Second
+	relay.BootDelay = 1 * time.Second
+	manet.Private4 = []*net.IPNet{}
+}
+
+// mock routing
+type mockRoutingTable struct {
+	mx        sync.Mutex
+	providers map[string]map[peer.ID]pstore.PeerInfo
+}
+
+type mockRouting struct {
+	h   host.Host
+	tab *mockRoutingTable
+}
+
+func newMockRoutingTable() *mockRoutingTable {
+	return &mockRoutingTable{providers: make(map[string]map[peer.ID]pstore.PeerInfo)}
+}
+
+func newMockRouting(h host.Host, tab *mockRoutingTable) *mockRouting {
+	return &mockRouting{h: h, tab: tab}
+}
+
+func (m *mockRouting) FindPeer(ctx context.Context, p peer.ID) (pstore.PeerInfo, error) {
+	return pstore.PeerInfo{}, routing.ErrNotFound
+}
+
+func (m *mockRouting) Provide(ctx context.Context, cid cid.Cid, bcast bool) error {
+	m.tab.mx.Lock()
+	defer m.tab.mx.Unlock()
+
+	pmap, ok := m.tab.providers[cid.String()]
+	if !ok {
+		pmap = make(map[peer.ID]pstore.PeerInfo)
+		m.tab.providers[cid.String()] = pmap
+	}
+
+	pmap[m.h.ID()] = pstore.PeerInfo{ID: m.h.ID(), Addrs: m.h.Addrs()}
+
+	return nil
+}
+
+func (m *mockRouting) FindProvidersAsync(ctx context.Context, cid cid.Cid, limit int) <-chan pstore.PeerInfo {
+	ch := make(chan pstore.PeerInfo)
+	go func() {
+		defer close(ch)
+		m.tab.mx.Lock()
+		defer m.tab.mx.Unlock()
+
+		pmap, ok := m.tab.providers[cid.String()]
+		if !ok {
+			return
+		}
+
+		for _, pi := range pmap {
+			select {
+			case ch <- pi:
+			case <-ctx.Done():
+				return
+			}
+		}
+	}()
+
+	return ch
+}
+
+// mock autonat
+func makeAutoNATServicePrivate(ctx context.Context, t *testing.T) host.Host {
+	h, err := libp2p.New(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	h.SetStreamHandler(autonat.AutoNATProto, sayAutoNATPrivate)
+	return h
+}
+
+func sayAutoNATPrivate(s inet.Stream) {
+	defer s.Close()
+	w := ggio.NewDelimitedWriter(s)
+	res := autonatpb.Message{
+		Type:         autonatpb.Message_DIAL_RESPONSE.Enum(),
+		DialResponse: newDialResponseError(autonatpb.Message_E_DIAL_ERROR, "no dialable addresses"),
+	}
+	w.WriteMsg(&res)
+}
+
+func newDialResponseError(status autonatpb.Message_ResponseStatus, text string) *autonatpb.Message_DialResponse {
+	dr := new(autonatpb.Message_DialResponse)
+	dr.Status = status.Enum()
+	dr.StatusText = &text
+	return dr
+}
+
+// connector
+func connect(t *testing.T, a, b host.Host) {
+	pinfo := pstore.PeerInfo{ID: a.ID(), Addrs: a.Addrs()}
+	err := b.Connect(context.Background(), pinfo)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+// and the actual test!
+func TestAutoRelay(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	mtab := newMockRoutingTable()
+	makeRouting := func(h host.Host) (config.Routing, error) {
+		mr := newMockRouting(h, mtab)
+		return mr, nil
+	}
+
+	h1 := makeAutoNATServicePrivate(ctx, t)
+	_, err := libp2p.New(ctx, libp2p.EnableRelay(circuit.OptHop), libp2p.Routing(makeRouting))
+	if err != nil {
+		t.Fatal(err)
+	}
+	h3, err := libp2p.New(ctx, libp2p.EnableRelay(), libp2p.Routing(makeRouting))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	connect(t, h1, h3)
+	time.Sleep(3 * time.Second)
+
+	haveRelay := false
+	for _, addr := range h3.Addrs() {
+		_, err := addr.ValueForProtocol(circuit.P_CIRCUIT)
+		if err != nil {
+			haveRelay = true
+			break
+		}
+	}
+
+	if !haveRelay {
+		t.Fatal("No relay addrs advertised")
+	}
+}