func TestInitiateHandshakes(t *testing.T) {
Convey("Sends out handshake request to every IP in list", t, func() {
s := NewBTService(port, []byte(peerIDRemote))
mc := NewMockConnectionFetcher()
s.ConnectionFetcher = mc
s.AddHash(hash)
_ = s.StartListening()
// TODO: check that peer data is saved within service data structure
peers := make([]structure.Peer, 2)
peers[0] = structure.Peer{IP: net.IPv4(192, 168, 1, 1), Port: 55556}
peers[1] = structure.Peer{IP: net.IPv4(192, 168, 1, 2), Port: 55557}
s.InitiateHandshakes(hash, peers)
for _, p := range peers {
c0 := mc.Conns[p.AddrString()].Conn.(*MockConnection)
hs, err := structure.ReadHandshake(bytes.NewReader(<-c0.ReceiveBytesChan))
So(hs, ShouldNotBeNil)
So(err, ShouldBeNil)
hs, _ = structure.NewHandshake(hash, []byte(peerIDClient))
c0.SendMessage(hs)
}
time.Sleep(time.Millisecond)
So(len(s.Peers), ShouldEqual, len(peers))
_ = s.StopListening()
time.Sleep(time.Millisecond)
So(s.Listening, ShouldBeFalse)
})
}
func TestConversation(t *testing.T) {
Convey("Receives Bitfield message and sends Interested message", t, func(ctx C) {
s := NewBTService(port, []byte(peerIDRemote))
mc := NewMockConnectionFetcher()
s.ConnectionFetcher = mc
s.AddHash(hash)
_ = s.StartListening()
// TODO: check that peer data is saved within service data structure
peers := make([]structure.Peer, 1)
peers[0] = structure.Peer{IP: net.IPv4(192, 168, 1, 1), Port: 55556}
// peers[1] = structure.Peer{IP: net.IPv4(192, 168, 1, 2), Port: 55557}
s.InitiateHandshakes(hash, peers)
wg := sync.WaitGroup{}
wg.Add(len(peers))
for _, p := range peers {
go func(pp structure.Peer) {
c0 := mc.Conns[pp.AddrString()].Conn.(*MockConnection)
hs, err := structure.ReadHandshake(bytes.NewReader(<-c0.ReceiveBytesChan))
ctx.So(hs, ShouldNotBeNil)
ctx.So(err, ShouldBeNil)
hs, _ = structure.NewHandshake(hash, []byte(peerIDClient))
t.Log("---TEST--- Send Handshake")
c0.SendMessage(hs)
bf := structure.BitFieldFromHexString("\xff\xff\xff\x01")
msg0 := structure.NewBitFieldMessage(bf)
c0.SendMessage(msg0)
m, err := ReadMessageOrTimeout(c0, ctx)
ctx.So(err, ShouldBeNil)
ctx.So(m.GetType(), ShouldEqual, structure.MessageTypeInterested)
// TODO: Check why byte equality doesn't work
btc := s.LookupConn(pp.AddrString())
t.Logf("BTC: %q\n", btc.BitField.String())
t.Logf("BF : %q\n", bf.String())
ctx.So(bf.String(), ShouldEqual, btc.BitField.String())
ctx.So(btc.PeerChoking, ShouldBeTrue)
msg1 := structure.NewUnchokeMessage()
c0.SendMessage(msg1)
m, err = ReadMessageOrTimeout(c0, ctx)
ctx.So(btc.PeerChoking, ShouldBeFalse)
ctx.So(err, ShouldBeNil)
ctx.So(m.GetType(), ShouldEqual, structure.MessageTypeRequest)
wg.Done()
}(p)
}
wg.Wait()
_ = s.StopListening()
})
}
func TestHave(t *testing.T) {
Convey("Receives Have Messages and update BitField", t, func(ctx C) {
s := NewBTService(port, []byte(peerIDRemote))
mc := NewMockConnectionFetcher()
s.ConnectionFetcher = mc
s.AddHash(hash)
_ = s.StartListening()
// TODO: check that peer data is saved within service data structure
peers := make([]structure.Peer, 1)
peers[0] = structure.Peer{IP: net.IPv4(192, 168, 1, 1), Port: 55557}
// peers[1] = structure.Peer{IP: net.IPv4(192, 168, 1, 2), Port: 55557}
s.InitiateHandshakes(hash, peers)
wg := sync.WaitGroup{}
wg.Add(len(peers))
for _, p := range peers {
go func(pp structure.Peer) {
c0 := mc.Conns[pp.AddrString()].Conn.(*MockConnection)
hs, err := structure.ReadHandshake(bytes.NewReader(<-c0.ReceiveBytesChan))
ctx.So(hs, ShouldNotBeNil)
ctx.So(err, ShouldBeNil)
hs, _ = structure.NewHandshake(hash, []byte(peerIDClient))
c0.SendMessage(hs)
bf := structure.BitFieldFromHexString("\x00\x00\x00\x01")
msg0 := structure.NewBitFieldMessage(bf)
c0.SendMessage(msg0)
m, err := ReadMessageOrTimeout(c0, ctx)
ctx.So(err, ShouldBeNil)
ctx.So(m.GetType(), ShouldEqual, structure.MessageTypeInterested)
haveMsg := structure.NewHaveMessage(0)
c0.SendMessage(haveMsg)
time.Sleep(time.Millisecond)
// TODO: Check why byte equality doesn't work
btc := s.LookupConn(pp.AddrString())
ctx.Printf("BTC: %q\n", btc.BitField.String())
ctx.Printf("BF : %q\n", bf.String())
updatedBF := structure.BitFieldFromHexString("\x80\x00\x00\x01")
ctx.Printf("UBF: %q\n", updatedBF.String())
isEqual := updatedBF.String() == btc.BitField.String()
ctx.So(isEqual, ShouldBeTrue)
wg.Done()
}(p)
}
wg.Wait()
_ = s.StopListening()
time.Sleep(time.Millisecond)
})
}
func (s *BTService) InitiateHandshakes(hash []byte, peers []structure.Peer) {
for _, peer := range peers {
addr := fmt.Sprintf("%q:%d", peer.IP, peer.Port)
log.Printf("[InitiateHandshakes] Address: %q", addr)
btc, err := s.ConnectionFetcher.Dial(addr)
if err != nil {
// TODO: Try more than once before giving up?
continue
}
hs, _ := structure.NewHandshake(hash, s.PeerID)
btc.Write(hs.Bytes())
btc.Hash = string(hash)
btc.State = BTStateWaitingForHandshake
btc.handleConnection(s)
btc.HandshakeChan <- true
}
}
func (btc *BTConn) readLoop(addChan, leaveChan chan<- *BTConn) {
for {
select {
case _ = <-btc.HandshakeChan:
log.Printf("[readLoop] Waiting for Handshake\n")
peerHs, err := handleHandshake(btc)
if err != nil {
log.Printf("[readLoop] Error: %q", err.Error())
btc.Close()
leaveChan <- btc
continue
}
log.Printf("[readLoop] State: %q", btc.State)
switch btc.State {
case BTStateWaitingForHandshake:
log.Printf("[readLoop] HashMatch? %q === %q?", btc.Hash, string(peerHs.Hash))
if btc.Hash != string(peerHs.Hash) {
// TODO: What if same connection is handling multiple hashes?
log.Printf("[readLoop] Hash mismatch\n")
btc.Close()
leaveChan <- btc
continue
}
case BTStateStartListening:
log.Printf("Writing byte %q\n", btc)
respHs, err := structure.NewHandshake(peerHs.Hash, []byte(btc.PeerID))
log.Println("[readLoop] respHS ", respHs)
if err != nil {
log.Printf("[readLoop] %q\n", err.Error())
btc.Close()
leaveChan <- btc
continue
}
btc.Write(respHs.Bytes())
default:
log.Printf("[readLoop] BAD STATE: %d", btc.State)
btc.Close()
leaveChan <- btc
continue
}
addChan <- btc
log.Printf("AAAAAAAAAAAAAAAAAAAAAAAA: %q", btc.Addr)
btc.State = BTStateReadyForMessages
btc.MessageChan <- true
case _ = <-btc.MessageChan:
log.Printf("[readLoop] Reading from MessageChan: %q", btc)
m, err := structure.ReadMessage(btc)
if err != nil {
log.Printf("[readLoop] Error reading message: %s", err)
btc.Close()
leaveChan <- btc
continue
}
log.Printf("[readLoop] Did Read from MessageChan: %q", m)
switch m.(type) {
case *structure.KeepAliveMessage:
log.Println("[readLoop] Received: KeepAlive MESSAGE")
// TODO: reset disconnect timer
break
case *structure.ChokeMessage:
break
case *structure.UnchokeMessage:
log.Println("[readLoop] Received: Unchoke MESSAGE")
btc.PeerChoking = false
btc.WriteChan <- structure.NewRequestMessage(0x00000bb0, 0x00024000, 0x00004000)
case *structure.BitFieldMessage:
log.Println("[readLoop] Received: Bit Field MESSAGE")
btc.BitField = m.(*structure.BitFieldMessage).BitField
btc.WriteChan <- structure.NewInterestedMessage()
case *structure.HaveMessage:
log.Println("[readLoop] Received: Have MESSAGE")
pi := m.(*structure.HaveMessage).PieceIndex
log.Printf("[readLoop] Have Message Index: %q", pi)
log.Printf("BIT 0: %q", btc.BitField.Get(0))
btc.BitField.Set(uint32(pi), 1)
log.Printf("BIT 0: %q", btc.BitField.Get(0))
// case *structure.PieceMessage:
// log.Println("[readLoop] Received: Piece MESSAGE")
default:
log.Println("[readLoop] Received: OTHER MESSAGE")
}
log.Println("[readLoop] Received Message: ", m)
btc.MessageChan <- true
}
}
}