329 lines
8.1 KiB
Go
329 lines
8.1 KiB
Go
package p2p
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"net"
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"reflect"
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"sort"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/p2p/discover"
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"github.com/ethereum/go-ethereum/rlp"
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)
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var discard = Protocol{
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Name: "discard",
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Length: 1,
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Run: func(p *Peer, rw MsgReadWriter) error {
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for {
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msg, err := rw.ReadMsg()
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if err != nil {
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return err
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}
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if err = msg.Discard(); err != nil {
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return err
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}
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}
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},
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}
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func testPeer(noHandshake bool, protos []Protocol) (*frameRW, *Peer, <-chan DiscReason) {
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conn1, conn2 := net.Pipe()
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peer := newPeer(conn1, protos, "name", &discover.NodeID{}, &discover.NodeID{})
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peer.noHandshake = noHandshake
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errc := make(chan DiscReason, 1)
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go func() { errc <- peer.run() }()
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return newFrameRW(conn2, msgWriteTimeout), peer, errc
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}
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func TestPeerProtoReadMsg(t *testing.T) {
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defer testlog(t).detach()
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done := make(chan struct{})
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proto := Protocol{
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Name: "a",
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Length: 5,
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Run: func(peer *Peer, rw MsgReadWriter) error {
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if err := expectMsg(rw, 2, []uint{1}); err != nil {
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t.Error(err)
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}
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if err := expectMsg(rw, 3, []uint{2}); err != nil {
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t.Error(err)
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}
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if err := expectMsg(rw, 4, []uint{3}); err != nil {
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t.Error(err)
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}
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close(done)
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return nil
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},
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}
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rw, peer, errc := testPeer(true, []Protocol{proto})
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defer rw.Close()
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peer.startSubprotocols([]Cap{proto.cap()})
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EncodeMsg(rw, baseProtocolLength+2, 1)
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EncodeMsg(rw, baseProtocolLength+3, 2)
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EncodeMsg(rw, baseProtocolLength+4, 3)
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select {
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case <-done:
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case err := <-errc:
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t.Errorf("peer returned: %v", err)
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case <-time.After(2 * time.Second):
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t.Errorf("receive timeout")
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}
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}
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func TestPeerProtoReadLargeMsg(t *testing.T) {
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defer testlog(t).detach()
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msgsize := uint32(10 * 1024 * 1024)
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done := make(chan struct{})
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proto := Protocol{
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Name: "a",
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Length: 5,
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Run: func(peer *Peer, rw MsgReadWriter) error {
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msg, err := rw.ReadMsg()
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if err != nil {
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t.Errorf("read error: %v", err)
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}
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if msg.Size != msgsize+4 {
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t.Errorf("incorrect msg.Size, got %d, expected %d", msg.Size, msgsize)
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}
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msg.Discard()
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close(done)
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return nil
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},
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}
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rw, peer, errc := testPeer(true, []Protocol{proto})
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defer rw.Close()
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peer.startSubprotocols([]Cap{proto.cap()})
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EncodeMsg(rw, 18, make([]byte, msgsize))
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select {
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case <-done:
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case err := <-errc:
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t.Errorf("peer returned: %v", err)
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case <-time.After(2 * time.Second):
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t.Errorf("receive timeout")
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}
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}
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func TestPeerProtoEncodeMsg(t *testing.T) {
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defer testlog(t).detach()
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proto := Protocol{
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Name: "a",
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Length: 2,
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Run: func(peer *Peer, rw MsgReadWriter) error {
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if err := EncodeMsg(rw, 2); err == nil {
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t.Error("expected error for out-of-range msg code, got nil")
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}
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if err := EncodeMsg(rw, 1, "foo", "bar"); err != nil {
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t.Errorf("write error: %v", err)
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}
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return nil
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},
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}
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rw, peer, _ := testPeer(true, []Protocol{proto})
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defer rw.Close()
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peer.startSubprotocols([]Cap{proto.cap()})
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if err := expectMsg(rw, 17, []string{"foo", "bar"}); err != nil {
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t.Error(err)
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}
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}
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func TestPeerWriteForBroadcast(t *testing.T) {
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defer testlog(t).detach()
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rw, peer, peerErr := testPeer(true, []Protocol{discard})
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defer rw.Close()
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peer.startSubprotocols([]Cap{discard.cap()})
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// test write errors
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if err := peer.writeProtoMsg("b", NewMsg(3)); err == nil {
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t.Errorf("expected error for unknown protocol, got nil")
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}
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if err := peer.writeProtoMsg("discard", NewMsg(8)); err == nil {
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t.Errorf("expected error for out-of-range msg code, got nil")
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} else if perr, ok := err.(*peerError); !ok || perr.Code != errInvalidMsgCode {
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t.Errorf("wrong error for out-of-range msg code, got %#v", err)
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}
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// setup for reading the message on the other end
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read := make(chan struct{})
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go func() {
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if err := expectMsg(rw, 16, nil); err != nil {
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t.Error()
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}
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close(read)
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}()
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// test successful write
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if err := peer.writeProtoMsg("discard", NewMsg(0)); err != nil {
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t.Errorf("expect no error for known protocol: %v", err)
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}
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select {
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case <-read:
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case err := <-peerErr:
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t.Fatalf("peer stopped: %v", err)
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}
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}
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func TestPeerPing(t *testing.T) {
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defer testlog(t).detach()
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rw, _, _ := testPeer(true, nil)
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defer rw.Close()
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if err := EncodeMsg(rw, pingMsg); err != nil {
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t.Fatal(err)
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}
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if err := expectMsg(rw, pongMsg, nil); err != nil {
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t.Error(err)
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}
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}
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func TestPeerDisconnect(t *testing.T) {
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defer testlog(t).detach()
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rw, _, disc := testPeer(true, nil)
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defer rw.Close()
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if err := EncodeMsg(rw, discMsg, DiscQuitting); err != nil {
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t.Fatal(err)
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}
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if err := expectMsg(rw, discMsg, []interface{}{DiscRequested}); err != nil {
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t.Error(err)
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}
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rw.Close() // make test end faster
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if reason := <-disc; reason != DiscRequested {
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t.Errorf("run returned wrong reason: got %v, want %v", reason, DiscRequested)
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}
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}
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func TestPeerHandshake(t *testing.T) {
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defer testlog(t).detach()
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// remote has two matching protocols: a and c
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remote := NewPeer(randomID(), "", []Cap{{"a", 1}, {"b", 999}, {"c", 3}})
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remoteID := randomID()
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remote.ourID = &remoteID
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remote.ourName = "remote peer"
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start := make(chan string)
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stop := make(chan struct{})
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run := func(p *Peer, rw MsgReadWriter) error {
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name := rw.(*proto).name
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if name != "a" && name != "c" {
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t.Errorf("protocol %q should not be started", name)
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} else {
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start <- name
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}
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<-stop
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return nil
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}
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protocols := []Protocol{
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{Name: "a", Version: 1, Length: 1, Run: run},
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{Name: "b", Version: 2, Length: 1, Run: run},
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{Name: "c", Version: 3, Length: 1, Run: run},
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{Name: "d", Version: 4, Length: 1, Run: run},
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}
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rw, p, disc := testPeer(false, protocols)
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p.remoteID = remote.ourID
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defer rw.Close()
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// run the handshake
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remoteProtocols := []Protocol{protocols[0], protocols[2]}
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if err := writeProtocolHandshake(rw, "remote peer", remoteID, remoteProtocols); err != nil {
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t.Fatalf("handshake write error: %v", err)
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}
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if err := readProtocolHandshake(remote, rw); err != nil {
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t.Fatalf("handshake read error: %v", err)
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}
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// check that all protocols have been started
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var started []string
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for i := 0; i < 2; i++ {
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select {
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case name := <-start:
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started = append(started, name)
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case <-time.After(100 * time.Millisecond):
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}
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}
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sort.Strings(started)
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if !reflect.DeepEqual(started, []string{"a", "c"}) {
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t.Errorf("wrong protocols started: %v", started)
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}
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// check that metadata has been set
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if p.ID() != remoteID {
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t.Errorf("peer has wrong node ID: got %v, want %v", p.ID(), remoteID)
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}
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if p.Name() != remote.ourName {
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t.Errorf("peer has wrong node name: got %q, want %q", p.Name(), remote.ourName)
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}
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close(stop)
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expectMsg(rw, discMsg, nil)
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t.Logf("disc reason: %v", <-disc)
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}
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func TestNewPeer(t *testing.T) {
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name := "nodename"
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caps := []Cap{{"foo", 2}, {"bar", 3}}
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id := randomID()
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p := NewPeer(id, name, caps)
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if p.ID() != id {
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t.Errorf("ID mismatch: got %v, expected %v", p.ID(), id)
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}
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if p.Name() != name {
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t.Errorf("Name mismatch: got %v, expected %v", p.Name(), name)
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}
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if !reflect.DeepEqual(p.Caps(), caps) {
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t.Errorf("Caps mismatch: got %v, expected %v", p.Caps(), caps)
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}
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p.Disconnect(DiscAlreadyConnected) // Should not hang
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}
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// expectMsg reads a message from r and verifies that its
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// code and encoded RLP content match the provided values.
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// If content is nil, the payload is discarded and not verified.
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func expectMsg(r MsgReader, code uint64, content interface{}) error {
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msg, err := r.ReadMsg()
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if err != nil {
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return err
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}
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if msg.Code != code {
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return fmt.Errorf("message code mismatch: got %d, expected %d", msg.Code, code)
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}
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if content == nil {
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return msg.Discard()
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} else {
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contentEnc, err := rlp.EncodeToBytes(content)
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if err != nil {
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panic("content encode error: " + err.Error())
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}
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// skip over list header in encoded value. this is temporary.
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contentEncR := bytes.NewReader(contentEnc)
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if k, _, err := rlp.NewStream(contentEncR).Kind(); k != rlp.List || err != nil {
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panic("content must encode as RLP list")
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}
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contentEnc = contentEnc[len(contentEnc)-contentEncR.Len():]
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actualContent, err := ioutil.ReadAll(msg.Payload)
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if err != nil {
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return err
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}
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if !bytes.Equal(actualContent, contentEnc) {
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return fmt.Errorf("message payload mismatch:\ngot: %x\nwant: %x", actualContent, contentEnc)
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}
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}
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return nil
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}
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