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package p2p
import (
"bufio"
"fmt"
"io"
"log"
"net"
"os"
"reflect"
"testing"
"time"
logpkg "github.com/ethereum/go-ethereum/logger"
)
func init() {
logpkg.AddLogSystem(logpkg.NewStdLogSystem(os.Stdout, log.LstdFlags, logpkg.DebugLevel))
}
func testMessenger(handlers Handlers) (net.Conn, *Peer, *messenger) {
conn1, conn2 := net.Pipe()
id := NewSimpleClientIdentity("test", "0", "0", "public key")
server := New(nil, conn1.LocalAddr(), id, handlers, 10, NewBlacklist())
peer := server.addPeer(conn1, conn1.RemoteAddr(), true, 0)
return conn2, peer, peer.messenger
}
func performTestHandshake(r *bufio.Reader, w io.Writer) error {
// read remote handshake
msg, err := readMsg(r)
if err != nil {
return fmt.Errorf("read error: %v", err)
}
if msg.Code != handshakeMsg {
return fmt.Errorf("first message should be handshake, got %d", msg.Code)
}
if err := msg.Discard(); err != nil {
return err
}
// send empty handshake
pubkey := make([]byte, 64)
msg = NewMsg(handshakeMsg, p2pVersion, "testid", nil, 9999, pubkey)
return writeMsg(w, msg)
}
type testProtocol struct {
offset MsgCode
f func(MsgReadWriter)
}
func (p *testProtocol) Offset() MsgCode {
return p.offset
}
func (p *testProtocol) Start(peer *Peer, rw MsgReadWriter) error {
p.f(rw)
return nil
}
func TestRead(t *testing.T) {
done := make(chan struct{})
handlers := Handlers{
"a": &testProtocol{5, func(rw MsgReadWriter) {
msg, err := rw.ReadMsg()
if err != nil {
t.Errorf("read error: %v", err)
}
if msg.Code != 2 {
t.Errorf("incorrect msg code %d relayed to protocol", msg.Code)
}
data, err := msg.Data()
if err != nil {
t.Errorf("data decoding error: %v", err)
}
expdata := []interface{}{1, []byte{0x30, 0x30, 0x30}}
if !reflect.DeepEqual(data.Slice(), expdata) {
t.Errorf("incorrect msg data %#v", data.Slice())
}
close(done)
}},
}
net, peer, m := testMessenger(handlers)
defer peer.Stop()
bufr := bufio.NewReader(net)
if err := performTestHandshake(bufr, net); err != nil {
t.Fatalf("handshake failed: %v", err)
}
m.setRemoteProtocols([]string{"a"})
writeMsg(net, NewMsg(18, 1, "000"))
select {
case <-done:
case <-time.After(2 * time.Second):
t.Errorf("receive timeout")
}
}
func TestWriteFromProto(t *testing.T) {
handlers := Handlers{
"a": &testProtocol{2, func(rw MsgReadWriter) {
if err := rw.WriteMsg(NewMsg(2)); err == nil {
t.Error("expected error for out-of-range msg code, got nil")
}
if err := rw.WriteMsg(NewMsg(1)); err != nil {
t.Errorf("write error: %v", err)
}
}},
}
net, peer, mess := testMessenger(handlers)
defer peer.Stop()
bufr := bufio.NewReader(net)
if err := performTestHandshake(bufr, net); err != nil {
t.Fatalf("handshake failed: %v", err)
}
mess.setRemoteProtocols([]string{"a"})
msg, err := readMsg(bufr)
if err != nil {
t.Errorf("read error: %v")
}
if msg.Code != 17 {
t.Errorf("incorrect message code: got %d, expected %d", msg.Code, 17)
}
}
var discardProto = &testProtocol{1, func(rw MsgReadWriter) {
for {
msg, err := rw.ReadMsg()
if err != nil {
return
}
if err = msg.Discard(); err != nil {
return
}
}
}}
func TestMessengerWriteProtoMsg(t *testing.T) {
handlers := Handlers{"a": discardProto}
net, peer, mess := testMessenger(handlers)
defer peer.Stop()
bufr := bufio.NewReader(net)
if err := performTestHandshake(bufr, net); err != nil {
t.Fatalf("handshake failed: %v", err)
}
mess.setRemoteProtocols([]string{"a"})
// test write errors
if err := mess.writeProtoMsg("b", NewMsg(3)); err == nil {
t.Errorf("expected error for unknown protocol, got nil")
}
if err := mess.writeProtoMsg("a", NewMsg(8)); err == nil {
t.Errorf("expected error for out-of-range msg code, got nil")
} else if perr, ok := err.(*PeerError); !ok || perr.Code != InvalidMsgCode {
t.Errorf("wrong error for out-of-range msg code, got %#v")
}
// test succcessful write
read, readerr := make(chan Msg), make(chan error)
go func() {
if msg, err := readMsg(bufr); err != nil {
readerr <- err
} else {
read <- msg
}
}()
if err := mess.writeProtoMsg("a", NewMsg(0)); err != nil {
t.Errorf("expect no error for known protocol: %v", err)
}
select {
case msg := <-read:
if msg.Code != 16 {
t.Errorf("wrong code, got %d, expected %d", msg.Code, 16)
}
msg.Discard()
case err := <-readerr:
t.Errorf("read error: %v", err)
}
}
func TestPulse(t *testing.T) {
net, peer, _ := testMessenger(nil)
defer peer.Stop()
bufr := bufio.NewReader(net)
if err := performTestHandshake(bufr, net); err != nil {
t.Fatalf("handshake failed: %v", err)
}
before := time.Now()
msg, err := readMsg(bufr)
if err != nil {
t.Fatalf("read error: %v", err)
}
after := time.Now()
if msg.Code != pingMsg {
t.Errorf("expected ping message, got %d", msg.Code)
}
if d := after.Sub(before); d < pingTimeout {
t.Errorf("ping sent too early after %v, expected at least %v", d, pingTimeout)
}
}
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