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|
package p2p
import (
"fmt"
"net"
"reflect"
"sync"
"testing"
"github.com/ethereum/go-ethereum/crypto"
)
type peerId struct {
pubkey []byte
}
func (self *peerId) String() string {
return fmt.Sprintf("test peer %x", self.Pubkey()[:4])
}
func (self *peerId) Pubkey() (pubkey []byte) {
pubkey = self.pubkey
if len(pubkey) == 0 {
pubkey = crypto.GenerateNewKeyPair().PublicKey
self.pubkey = pubkey
}
return
}
func newTestPeer() (peer *Peer) {
peer = NewPeer(&peerId{}, []Cap{})
peer.pubkeyHook = func(*peerAddr) error { return nil }
peer.ourID = &peerId{}
peer.listenAddr = &peerAddr{}
peer.otherPeers = func() []*Peer { return nil }
return
}
func TestBaseProtocolPeers(t *testing.T) {
peerList := []*peerAddr{
{IP: net.ParseIP("1.2.3.4"), Port: 2222, Pubkey: []byte{}},
{IP: net.ParseIP("5.6.7.8"), Port: 3333, Pubkey: []byte{}},
}
listenAddr := &peerAddr{IP: net.ParseIP("1.3.5.7"), Port: 1111, Pubkey: []byte{}}
rw1, rw2 := MsgPipe()
defer rw1.Close()
wg := new(sync.WaitGroup)
// run matcher, close pipe when addresses have arrived
numPeers := len(peerList) + 1
addrChan := make(chan *peerAddr)
wg.Add(1)
go func() {
i := 0
for got := range addrChan {
var want *peerAddr
switch {
case i < len(peerList):
want = peerList[i]
case i == len(peerList):
want = listenAddr // listenAddr should be the last thing sent
}
t.Logf("got peer %d/%d: %v", i+1, numPeers, got)
if !reflect.DeepEqual(want, got) {
t.Errorf("mismatch: got %+v, want %+v", got, want)
}
i++
if i == numPeers {
break
}
}
if i != numPeers {
t.Errorf("wrong number of peers received: got %d, want %d", i, numPeers)
}
rw1.Close()
wg.Done()
}()
// run first peer (in background)
peer1 := newTestPeer()
peer1.ourListenAddr = listenAddr
peer1.otherPeers = func() []*Peer {
pl := make([]*Peer, len(peerList))
for i, addr := range peerList {
pl[i] = &Peer{listenAddr: addr}
}
return pl
}
wg.Add(1)
go func() {
runBaseProtocol(peer1, rw1)
wg.Done()
}()
// run second peer
peer2 := newTestPeer()
peer2.newPeerAddr = addrChan // feed peer suggestions into matcher
if err := runBaseProtocol(peer2, rw2); err != ErrPipeClosed {
t.Errorf("peer2 terminated with unexpected error: %v", err)
}
// terminate matcher
close(addrChan)
wg.Wait()
}
func TestBaseProtocolDisconnect(t *testing.T) {
peer := NewPeer(&peerId{}, nil)
peer.ourID = &peerId{}
peer.pubkeyHook = func(*peerAddr) error { return nil }
rw1, rw2 := MsgPipe()
done := make(chan struct{})
go func() {
if err := expectMsg(rw2, handshakeMsg); err != nil {
t.Error(err)
}
err := EncodeMsg(rw2, handshakeMsg,
baseProtocolVersion,
"",
[]interface{}{},
0,
make([]byte, 64),
)
if err != nil {
t.Error(err)
}
if err := expectMsg(rw2, getPeersMsg); err != nil {
t.Error(err)
}
if err := EncodeMsg(rw2, discMsg, DiscQuitting); err != nil {
t.Error(err)
}
close(done)
}()
if err := runBaseProtocol(peer, rw1); err == nil {
t.Errorf("base protocol returned without error")
} else if reason, ok := err.(discRequestedError); !ok || reason != DiscQuitting {
t.Errorf("base protocol returned wrong error: %v", err)
}
<-done
}
func expectMsg(r MsgReader, code uint64) error {
msg, err := r.ReadMsg()
if err != nil {
return err
}
if err := msg.Discard(); err != nil {
return err
}
if msg.Code != code {
return fmt.Errorf("wrong message code: got %d, expected %d", msg.Code, code)
}
return nil
}
|
