2014-10-23 18:57:54 +03:00
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package p2p
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import (
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2014-11-21 22:48:49 +02:00
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"bytes"
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2015-02-05 04:07:58 +02:00
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"crypto/ecdsa"
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2014-11-04 14:21:44 +02:00
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"io"
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2015-02-05 04:07:58 +02:00
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"math/rand"
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2014-10-23 18:57:54 +03:00
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"net"
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2014-11-21 22:48:49 +02:00
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"sync"
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2014-10-23 18:57:54 +03:00
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"testing"
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"time"
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2015-02-05 04:07:58 +02:00
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"github.com/ethereum/go-ethereum/crypto"
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2015-02-27 05:06:55 +02:00
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"github.com/ethereum/go-ethereum/crypto/sha3"
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2015-02-05 04:07:58 +02:00
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"github.com/ethereum/go-ethereum/p2p/discover"
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2014-10-23 18:57:54 +03:00
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)
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2015-02-05 04:07:58 +02:00
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func startTestServer(t *testing.T, pf newPeerHook) *Server {
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2014-11-21 22:48:49 +02:00
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server := &Server{
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Name: "test",
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MaxPeers: 10,
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ListenAddr: "127.0.0.1:0",
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PrivateKey: newkey(),
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newPeerHook: pf,
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2015-05-04 13:59:51 +03:00
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setupFunc: func(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
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id := randomID()
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rw := newRlpxFrameRW(fd, secrets{
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MAC: zero16,
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AES: zero16,
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IngressMAC: sha3.NewKeccak256(),
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EgressMAC: sha3.NewKeccak256(),
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})
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return &conn{
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MsgReadWriter: rw,
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protoHandshake: &protoHandshake{ID: id, Version: baseProtocolVersion},
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}, nil
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},
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}
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2014-11-21 22:48:49 +02:00
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if err := server.Start(); err != nil {
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t.Fatalf("Could not start server: %v", err)
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2014-10-23 18:57:54 +03:00
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}
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2014-11-21 22:48:49 +02:00
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return server
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2014-10-23 18:57:54 +03:00
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}
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2014-11-21 22:48:49 +02:00
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func TestServerListen(t *testing.T) {
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defer testlog(t).detach()
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2014-11-04 14:21:44 +02:00
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2014-11-21 22:48:49 +02:00
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// start the test server
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connected := make(chan *Peer)
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2015-02-05 04:07:58 +02:00
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srv := startTestServer(t, func(p *Peer) {
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if p == nil {
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2014-11-21 22:48:49 +02:00
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t.Error("peer func called with nil conn")
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}
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2015-02-05 04:07:58 +02:00
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connected <- p
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})
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defer close(connected)
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defer srv.Stop()
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// dial the test server
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conn, err := net.DialTimeout("tcp", srv.ListenAddr, 5*time.Second)
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if err != nil {
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t.Fatalf("could not dial: %v", err)
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}
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defer conn.Close()
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2014-11-21 22:48:49 +02:00
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select {
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case peer := <-connected:
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if peer.LocalAddr().String() != conn.RemoteAddr().String() {
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2014-11-21 22:48:49 +02:00
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t.Errorf("peer started with wrong conn: got %v, want %v",
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peer.LocalAddr(), conn.RemoteAddr())
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2014-11-21 22:48:49 +02:00
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}
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case <-time.After(1 * time.Second):
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t.Error("server did not accept within one second")
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2014-11-04 14:21:44 +02:00
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}
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}
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2014-11-21 22:48:49 +02:00
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func TestServerDial(t *testing.T) {
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defer testlog(t).detach()
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2015-02-05 04:07:58 +02:00
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// run a one-shot TCP server to handle the connection.
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2014-11-21 22:48:49 +02:00
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listener, err := net.Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatalf("could not setup listener: %v")
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}
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defer listener.Close()
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accepted := make(chan net.Conn)
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go func() {
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conn, err := listener.Accept()
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if err != nil {
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t.Error("accept error:", err)
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return
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2014-11-21 22:48:49 +02:00
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}
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conn.Close()
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accepted <- conn
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}()
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2015-02-05 04:07:58 +02:00
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// start the server
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2014-11-21 22:48:49 +02:00
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connected := make(chan *Peer)
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2015-02-05 04:07:58 +02:00
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srv := startTestServer(t, func(p *Peer) { connected <- p })
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2014-11-21 22:48:49 +02:00
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defer close(connected)
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defer srv.Stop()
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2015-02-05 04:07:58 +02:00
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// tell the server to connect
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tcpAddr := listener.Addr().(*net.TCPAddr)
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2015-05-06 23:54:21 +03:00
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srv.staticDial <- &discover.Node{IP: tcpAddr.IP, TCP: uint16(tcpAddr.Port)}
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2014-11-21 22:48:49 +02:00
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select {
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case conn := <-accepted:
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select {
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2014-11-21 22:48:49 +02:00
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case peer := <-connected:
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2015-02-05 04:07:58 +02:00
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if peer.RemoteAddr().String() != conn.LocalAddr().String() {
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t.Errorf("peer started with wrong conn: got %v, want %v",
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peer.RemoteAddr(), conn.LocalAddr())
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}
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// TODO: validate more fields
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2014-11-21 22:48:49 +02:00
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case <-time.After(1 * time.Second):
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t.Error("server did not launch peer within one second")
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2014-11-04 14:21:44 +02:00
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}
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2014-11-21 22:48:49 +02:00
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case <-time.After(1 * time.Second):
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t.Error("server did not connect within one second")
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2014-10-23 18:57:54 +03:00
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}
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}
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2014-11-21 22:48:49 +02:00
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func TestServerBroadcast(t *testing.T) {
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defer testlog(t).detach()
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2014-11-21 22:48:49 +02:00
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var connected sync.WaitGroup
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2015-02-05 04:07:58 +02:00
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srv := startTestServer(t, func(p *Peer) {
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2015-02-19 02:52:03 +02:00
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p.running = matchProtocols([]Protocol{discard}, []Cap{discard.cap()}, p.rw)
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2014-11-21 22:48:49 +02:00
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connected.Done()
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})
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defer srv.Stop()
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2015-02-05 04:07:58 +02:00
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// create a few peers
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2014-11-21 22:48:49 +02:00
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var conns = make([]net.Conn, 8)
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connected.Add(len(conns))
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deadline := time.Now().Add(3 * time.Second)
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dialer := &net.Dialer{Deadline: deadline}
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for i := range conns {
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conn, err := dialer.Dial("tcp", srv.ListenAddr)
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if err != nil {
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t.Fatalf("conn %d: dial error: %v", i, err)
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}
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2014-11-21 22:48:49 +02:00
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defer conn.Close()
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conn.SetDeadline(deadline)
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conns[i] = conn
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}
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2014-11-21 22:48:49 +02:00
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connected.Wait()
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// broadcast one message
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2015-03-19 16:11:02 +02:00
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srv.Broadcast("discard", 0, []string{"foo"})
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2015-03-04 13:03:43 +02:00
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golden := unhex("66e94d166f0a2c3b884cfa59ca34")
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2014-11-21 22:48:49 +02:00
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// check that the message has been written everywhere
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for i, conn := range conns {
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buf := make([]byte, len(golden))
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if _, err := io.ReadFull(conn, buf); err != nil {
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t.Errorf("conn %d: read error: %v", i, err)
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} else if !bytes.Equal(buf, golden) {
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t.Errorf("conn %d: msg mismatch\ngot: %x\nwant: %x", i, buf, golden)
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}
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}
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}
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2015-02-05 04:07:58 +02:00
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2015-04-10 14:25:35 +03:00
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// This test checks that connections are disconnected
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// just after the encryption handshake when the server is
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// at capacity.
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//
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// It also serves as a light-weight integration test.
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func TestServerDisconnectAtCap(t *testing.T) {
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defer testlog(t).detach()
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started := make(chan *Peer)
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srv := &Server{
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ListenAddr: "127.0.0.1:0",
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PrivateKey: newkey(),
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MaxPeers: 10,
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NoDial: true,
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// This hook signals that the peer was actually started. We
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// need to wait for the peer to be started before dialing the
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// next connection to get a deterministic peer count.
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newPeerHook: func(p *Peer) { started <- p },
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}
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if err := srv.Start(); err != nil {
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t.Fatal(err)
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}
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defer srv.Stop()
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nconns := srv.MaxPeers + 1
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dialer := &net.Dialer{Deadline: time.Now().Add(3 * time.Second)}
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for i := 0; i < nconns; i++ {
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conn, err := dialer.Dial("tcp", srv.ListenAddr)
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if err != nil {
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t.Fatalf("conn %d: dial error: %v", i, err)
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}
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// Close the connection when the test ends, before
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// shutting down the server.
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defer conn.Close()
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// Run the handshakes just like a real peer would.
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key := newkey()
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hs := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
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2015-05-04 13:59:51 +03:00
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_, err = setupConn(conn, key, hs, srv.Self(), false, srv.trustedNodes)
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2015-04-10 14:25:35 +03:00
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if i == nconns-1 {
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// When handling the last connection, the server should
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// disconnect immediately instead of running the protocol
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// handshake.
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if err != DiscTooManyPeers {
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t.Errorf("conn %d: got error %q, expected %q", i, err, DiscTooManyPeers)
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}
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} else {
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// For all earlier connections, the handshake should go through.
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if err != nil {
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t.Fatalf("conn %d: unexpected error: %v", i, err)
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}
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// Wait for runPeer to be started.
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<-started
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}
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}
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}
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2015-05-04 13:08:42 +03:00
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// Tests that static peers are (re)connected, and done so even above max peers.
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func TestServerStaticPeers(t *testing.T) {
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defer testlog(t).detach()
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// Create a test server with limited connection slots
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started := make(chan *Peer)
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server := &Server{
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ListenAddr: "127.0.0.1:0",
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PrivateKey: newkey(),
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MaxPeers: 3,
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newPeerHook: func(p *Peer) { started <- p },
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staticCycle: time.Second,
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}
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if err := server.Start(); err != nil {
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t.Fatal(err)
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}
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defer server.Stop()
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// Fill up all the slots on the server
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dialer := &net.Dialer{Deadline: time.Now().Add(3 * time.Second)}
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for i := 0; i < server.MaxPeers; i++ {
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// Establish a new connection
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conn, err := dialer.Dial("tcp", server.ListenAddr)
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if err != nil {
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t.Fatalf("conn %d: dial error: %v", i, err)
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}
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defer conn.Close()
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// Run the handshakes just like a real peer would, and wait for completion
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key := newkey()
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shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
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2015-05-04 13:59:51 +03:00
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if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
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2015-05-04 13:08:42 +03:00
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t.Fatalf("conn %d: unexpected error: %v", i, err)
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}
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<-started
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}
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// Open a TCP listener to accept static connections
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listener, err := net.Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatalf("failed to setup listener: %v", err)
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}
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defer listener.Close()
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connected := make(chan net.Conn)
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go func() {
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for i := 0; i < 3; i++ {
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conn, err := listener.Accept()
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if err == nil {
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connected <- conn
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}
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}
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}()
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// Inject a static node and wait for a remote dial, then redial, then nothing
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addr := listener.Addr().(*net.TCPAddr)
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static := &discover.Node{
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2015-05-06 23:54:21 +03:00
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ID: discover.PubkeyID(&newkey().PublicKey),
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IP: addr.IP,
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TCP: uint16(addr.Port),
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2015-05-04 13:08:42 +03:00
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}
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server.AddPeer(static)
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select {
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case conn := <-connected:
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// Close the first connection, expect redial
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conn.Close()
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case <-time.After(2 * server.staticCycle):
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t.Fatalf("remote dial timeout")
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}
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select {
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case conn := <-connected:
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// Keep the second connection, don't expect redial
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defer conn.Close()
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case <-time.After(2 * server.staticCycle):
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t.Fatalf("remote re-dial timeout")
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}
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select {
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case <-time.After(2 * server.staticCycle):
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// Timeout as no dial occurred
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case <-connected:
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t.Fatalf("connected node dialed")
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}
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}
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2015-04-30 12:41:27 +03:00
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// Tests that trusted peers and can connect above max peer caps.
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|
|
|
func TestServerTrustedPeers(t *testing.T) {
|
|
|
|
defer testlog(t).detach()
|
|
|
|
|
2015-05-04 13:59:51 +03:00
|
|
|
// Create a trusted peer to accept connections from
|
|
|
|
key := newkey()
|
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|
|
trusted := &discover.Node{
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|
|
ID: discover.PubkeyID(&key.PublicKey),
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|
|
}
|
2015-04-30 12:41:27 +03:00
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|
|
// Create a test server with limited connection slots
|
|
|
|
started := make(chan *Peer)
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|
|
server := &Server{
|
2015-05-04 13:59:51 +03:00
|
|
|
ListenAddr: "127.0.0.1:0",
|
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|
|
PrivateKey: newkey(),
|
|
|
|
MaxPeers: 3,
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|
|
NoDial: true,
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|
|
TrustedNodes: []*discover.Node{trusted},
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|
|
newPeerHook: func(p *Peer) { started <- p },
|
2015-04-30 12:41:27 +03:00
|
|
|
}
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|
|
|
if err := server.Start(); err != nil {
|
|
|
|
t.Fatal(err)
|
|
|
|
}
|
|
|
|
defer server.Stop()
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|
|
|
|
|
|
|
// Fill up all the slots on the server
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|
|
|
dialer := &net.Dialer{Deadline: time.Now().Add(3 * time.Second)}
|
|
|
|
for i := 0; i < server.MaxPeers; i++ {
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|
|
|
// Establish a new connection
|
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|
|
conn, err := dialer.Dial("tcp", server.ListenAddr)
|
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|
|
if err != nil {
|
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|
|
t.Fatalf("conn %d: dial error: %v", i, err)
|
|
|
|
}
|
|
|
|
defer conn.Close()
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|
|
|
|
|
|
|
// Run the handshakes just like a real peer would, and wait for completion
|
|
|
|
key := newkey()
|
|
|
|
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
|
2015-05-04 13:59:51 +03:00
|
|
|
if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
|
2015-04-30 12:41:27 +03:00
|
|
|
t.Fatalf("conn %d: unexpected error: %v", i, err)
|
|
|
|
}
|
|
|
|
<-started
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|
|
|
}
|
2015-05-04 13:59:51 +03:00
|
|
|
// Dial from the trusted peer, ensure connection is accepted
|
2015-04-30 12:41:27 +03:00
|
|
|
conn, err := dialer.Dial("tcp", server.ListenAddr)
|
|
|
|
if err != nil {
|
|
|
|
t.Fatalf("trusted node: dial error: %v", err)
|
|
|
|
}
|
|
|
|
defer conn.Close()
|
|
|
|
|
|
|
|
shake := &protoHandshake{Version: baseProtocolVersion, ID: trusted.ID}
|
2015-05-04 13:59:51 +03:00
|
|
|
if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
|
2015-04-30 12:41:27 +03:00
|
|
|
t.Fatalf("trusted node: unexpected error: %v", err)
|
|
|
|
}
|
|
|
|
select {
|
|
|
|
case <-started:
|
|
|
|
// Ok, trusted peer accepted
|
|
|
|
|
|
|
|
case <-time.After(100 * time.Millisecond):
|
|
|
|
t.Fatalf("trusted node timeout")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-05-04 17:35:49 +03:00
|
|
|
// Tests that a failed dial will temporarily throttle a peer.
|
|
|
|
func TestServerMaxPendingDials(t *testing.T) {
|
|
|
|
defer testlog(t).detach()
|
|
|
|
|
|
|
|
// Start a simple test server
|
|
|
|
server := &Server{
|
|
|
|
ListenAddr: "127.0.0.1:0",
|
|
|
|
PrivateKey: newkey(),
|
|
|
|
MaxPeers: 10,
|
|
|
|
MaxPendingPeers: 1,
|
|
|
|
}
|
|
|
|
if err := server.Start(); err != nil {
|
|
|
|
t.Fatal("failed to start test server: %v", err)
|
|
|
|
}
|
|
|
|
defer server.Stop()
|
|
|
|
|
|
|
|
// Simulate two separate remote peers
|
|
|
|
peers := make(chan *discover.Node, 2)
|
|
|
|
conns := make(chan net.Conn, 2)
|
|
|
|
for i := 0; i < 2; i++ {
|
|
|
|
listener, err := net.Listen("tcp", "127.0.0.1:0")
|
|
|
|
if err != nil {
|
|
|
|
t.Fatalf("listener %d: failed to setup: %v", i, err)
|
|
|
|
}
|
|
|
|
defer listener.Close()
|
|
|
|
|
|
|
|
addr := listener.Addr().(*net.TCPAddr)
|
|
|
|
peers <- &discover.Node{
|
|
|
|
ID: discover.PubkeyID(&newkey().PublicKey),
|
|
|
|
IP: addr.IP,
|
|
|
|
TCP: uint16(addr.Port),
|
|
|
|
}
|
|
|
|
go func() {
|
|
|
|
conn, err := listener.Accept()
|
|
|
|
if err == nil {
|
|
|
|
conns <- conn
|
|
|
|
}
|
|
|
|
}()
|
|
|
|
}
|
|
|
|
// Request a dial for both peers
|
|
|
|
go func() {
|
|
|
|
for i := 0; i < 2; i++ {
|
|
|
|
server.staticDial <- <-peers // hack piggybacking the static implementation
|
|
|
|
}
|
|
|
|
}()
|
|
|
|
|
|
|
|
// Make sure only one outbound connection goes through
|
|
|
|
var conn net.Conn
|
|
|
|
|
|
|
|
select {
|
|
|
|
case conn = <-conns:
|
|
|
|
case <-time.After(100 * time.Millisecond):
|
|
|
|
t.Fatalf("first dial timeout")
|
|
|
|
}
|
|
|
|
select {
|
|
|
|
case conn = <-conns:
|
|
|
|
t.Fatalf("second dial completed prematurely")
|
|
|
|
case <-time.After(100 * time.Millisecond):
|
|
|
|
}
|
|
|
|
// Finish the first dial, check the second
|
|
|
|
conn.Close()
|
|
|
|
select {
|
|
|
|
case conn = <-conns:
|
|
|
|
conn.Close()
|
|
|
|
|
|
|
|
case <-time.After(100 * time.Millisecond):
|
|
|
|
t.Fatalf("second dial timeout")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
func TestServerMaxPendingAccepts(t *testing.T) {
|
|
|
|
defer testlog(t).detach()
|
|
|
|
|
|
|
|
// Start a test server and a peer sink for synchronization
|
|
|
|
started := make(chan *Peer)
|
|
|
|
server := &Server{
|
|
|
|
ListenAddr: "127.0.0.1:0",
|
|
|
|
PrivateKey: newkey(),
|
|
|
|
MaxPeers: 10,
|
|
|
|
MaxPendingPeers: 1,
|
|
|
|
NoDial: true,
|
|
|
|
newPeerHook: func(p *Peer) { started <- p },
|
|
|
|
}
|
|
|
|
if err := server.Start(); err != nil {
|
|
|
|
t.Fatal("failed to start test server: %v", err)
|
|
|
|
}
|
|
|
|
defer server.Stop()
|
|
|
|
|
|
|
|
// Try and connect to the server on multiple threads concurrently
|
|
|
|
conns := make([]net.Conn, 2)
|
|
|
|
for i := 0; i < 2; i++ {
|
|
|
|
dialer := &net.Dialer{Deadline: time.Now().Add(3 * time.Second)}
|
|
|
|
|
|
|
|
conn, err := dialer.Dial("tcp", server.ListenAddr)
|
|
|
|
if err != nil {
|
|
|
|
t.Fatalf("failed to dial server: %v", err)
|
|
|
|
}
|
|
|
|
conns[i] = conn
|
|
|
|
}
|
|
|
|
// Check that a handshake on the second doesn't pass
|
|
|
|
go func() {
|
|
|
|
key := newkey()
|
|
|
|
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
|
|
|
|
if _, err := setupConn(conns[1], key, shake, server.Self(), false, server.trustedNodes); err != nil {
|
|
|
|
t.Fatalf("failed to run handshake: %v", err)
|
|
|
|
}
|
|
|
|
}()
|
|
|
|
select {
|
|
|
|
case <-started:
|
|
|
|
t.Fatalf("handshake on second connection accepted")
|
|
|
|
|
2015-05-04 17:44:46 +03:00
|
|
|
case <-time.After(time.Second):
|
2015-05-04 17:35:49 +03:00
|
|
|
}
|
|
|
|
// Shake on first, check that both go through
|
|
|
|
go func() {
|
|
|
|
key := newkey()
|
|
|
|
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
|
|
|
|
if _, err := setupConn(conns[0], key, shake, server.Self(), false, server.trustedNodes); err != nil {
|
|
|
|
t.Fatalf("failed to run handshake: %v", err)
|
|
|
|
}
|
|
|
|
}()
|
|
|
|
for i := 0; i < 2; i++ {
|
|
|
|
select {
|
|
|
|
case <-started:
|
2015-05-04 17:44:46 +03:00
|
|
|
case <-time.After(time.Second):
|
2015-05-04 17:35:49 +03:00
|
|
|
t.Fatalf("peer %d: handshake timeout", i)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-02-05 04:07:58 +02:00
|
|
|
func newkey() *ecdsa.PrivateKey {
|
|
|
|
key, err := crypto.GenerateKey()
|
|
|
|
if err != nil {
|
|
|
|
panic("couldn't generate key: " + err.Error())
|
|
|
|
}
|
|
|
|
return key
|
|
|
|
}
|
|
|
|
|
|
|
|
func randomID() (id discover.NodeID) {
|
|
|
|
for i := range id {
|
|
|
|
id[i] = byte(rand.Intn(255))
|
|
|
|
}
|
|
|
|
return id
|
|
|
|
}
|