func test(peer *Peer, torrent *Torrent) (err error) {
log.Debugf("Fired!")
err = peer.Connect()
if err != nil || peer.Conn == nil {
return
}
err = peer.SendHandshake(torrent.InfoHash, string(torrent.ClientId))
if err != nil {
log.Errorf("%v", err)
}
err = peer.SendUnchoke()
if err != nil {
log.Errorf("%v", err)
}
err = peer.SendInterested()
if err != nil {
log.Errorf("%v", err)
}
err = peer.RequestBlock(300, 0, uint32(PieceChunkLenght))
if err != nil {
log.Errorf("%v", err)
}
err = peer.ReadHandshake()
log.Debugf("Receiving Data...")
err = peer.ReceiveData()
if err != nil {
log.Errorf("%v", err)
}
peer.ParseData()
return
}
func (torrent *Torrent) UpdatePeers() {
trackerResponse, err := torrent.Tracker.Peers(
torrent.InfoHash,
torrent.ClientId,
torrent.Port,
torrent.Uploaded,
torrent.Downloaded,
torrent.Length,
)
if err != nil {
log.Errorf("Unable to retrieve the peers: %v", err)
}
addresses := make(map[string]bool)
for _, peer := range torrent.Peers {
addresses[peer.Addr.String()] = true
}
for _, peerAddr := range trackerResponse.PeerAddresses {
if _, ok := addresses[peerAddr.String()]; !ok {
log.Debugf("Found Peer: %v", peerAddr)
torrent.AddPeer(peerAddr)
}
}
}
func (peer *Peer) ReadHandshake() (err error) {
buf := make([]byte, messages.HandshakeLength)
n, err := peer.Conn.Read(buf)
if err != nil || n != messages.HandshakeLength {
log.Errorf("Cannot read the handshake: %v", err)
return err
}
var hand messages.Handshake
err = binary.Read(bytes.NewBuffer(buf), binary.BigEndian, &hand)
if err != nil {
log.Errorf("%v", err)
}
log.Debugf("Handshake from peer %v", peer.Addr.String())
log.Debugf(hand.String())
return err
}
func (peer *Peer) ReceiveData() (err error) {
nBytes := 0
buf := make([]byte, 65536)
for {
peer.Conn.SetReadDeadline(time.Now().Add(5 * time.Second))
n, err := peer.Conn.Read(buf)
readed := buf[:n]
nBytes += n
if err == io.EOF || n == 0 {
break
}
if err != nil {
log.Errorf("Error in reading: %v", err)
return err
}
peer.Data = append(peer.Data, readed...)
}
log.Debugf("Readed %v, byte(s)", nBytes)
//log.Debugf("%v", peer.Data)
return
}
func (peer *Peer) ParseData() {
for {
if len(peer.Data) < 4 {
break
/*peer.SendUnchoke()
peer.SendInterested()
log.Debugf("Trying to request piece #%v", i)
peer.RequestBlock(300, 0, uint32(PieceChunkLenght))
peer.ReceiveData()
i++*/
}
var message messages.Message
err := binary.Read(bytes.NewBuffer(peer.Data[:4]), binary.BigEndian, &message.Length)
if err != nil {
panic(err)
}
if message.Length == 0 {
log.Debugf("Keep alive")
peer.Data = peer.Data[4:]
} else {
message.Id = peer.Data[4]
data := peer.Data[:4+message.Length]
switch message.Id {
case messages.ChokeId:
log.Debugf("Choke")
case messages.UnchokeId:
log.Debugf("Unchoke")
case messages.InterestedId:
log.Debugf("Interested")
case messages.NotInterestedId:
log.Debugf("NotInterested")
case messages.HaveId:
var haveMsg messages.Have
err = binary.Read(bytes.NewBuffer(data), binary.BigEndian, &haveMsg)
log.Debugf("Peer %v - Have piece #%v", peer.Addr.String(), haveMsg.PieceIndex)
if haveMsg.PieceIndex > peer.PieceCount {
log.Errorf("Invalid piece index, piece index: %v, piece count: %v", haveMsg.PieceIndex, peer.PieceCount)
break
}
peer.BitField.Set(int(haveMsg.PieceIndex), true)
log.Debugf("Peer %v - BitField updated", peer.Addr.String())
case messages.BitFieldId:
log.Debugf("BitField")
var bitMsg messages.BitArray
err = binary.Read(bytes.NewBuffer(data), binary.BigEndian, &bitMsg)
bitMsg.BitField = data[:message.Length-1]
bitCount := (message.Length - 1) * 8
if peer.PieceCount > bitCount {
log.Errorf("Invalid BitField, bit count: %v, piece count: %v", bitCount, peer.PieceCount)
break
}
peer.BitField = bitarray.NewFromBytes(bitMsg.BitField, int(peer.PieceCount))
log.Debugf("Peer %v - New BitField:", peer.Addr.String())
case messages.RequestId:
log.Debugf("Request")
case messages.PieceId:
log.Debugf("Piece")
var pieceMsg messages.Piece
err = binary.Read(bytes.NewBuffer(data), binary.BigEndian, &pieceMsg)
pieceMsg.BlockData = data[:message.Length-9]
log.Debugf("Peer %v - Found a new block - PieceIndex: %v BlockOffset: %v", peer.Addr.String(), pieceMsg.PieceIndex, pieceMsg.BlockOffset)
case messages.CancelId:
log.Debugf("Cancel")
case messages.PortId:
log.Debugf("Port")
}
peer.Data = peer.Data[4+message.Length:]
}
}
return
}
