protected virtual void HandleHandshakeMessage(PeerId id, HandshakeMessage message)
{
if (!message.ProtocolString.Equals(VersionInfo.ProtocolStringV100))
{
Logger.Log(id.Connection, "HandShake.Handle - Invalid protocol in handshake: {0}", message.ProtocolString);
throw new ProtocolException("Invalid protocol string");
}
// If we got the peer as a "compact" peer, then the peerid will be empty. In this case
// we just copy the one that is in the handshake.
if (string.IsNullOrEmpty(id.Peer.PeerId))
{
id.Peer.PeerId = message.PeerId;
}
// If the infohash doesn't match, dump the connection
if (message.InfoHash != id.TorrentManager.InfoHash)
{
Logger.Log(id.Connection, "HandShake.Handle - Invalid infohash");
throw new TorrentException("Invalid infohash. Not tracking this torrent");
}
// If the peer id's don't match, dump the connection. This is due to peers faking usually
if (id.Peer.PeerId != message.PeerId)
{
Logger.Log(id.Connection, "HandShake.Handle - Invalid peerid");
throw new TorrentException("Supplied PeerID didn't match the one the tracker gave us");
}
// Attempt to parse the application that the peer is using
id.ClientApp = new Software(message.PeerId);
id.SupportsFastPeer = message.SupportsFastPeer;
id.SupportsLTMessages = message.SupportsExtendedMessaging;
// If they support fast peers, create their list of allowed pieces that they can request off me
if (id.SupportsFastPeer && id.TorrentManager != null && id.TorrentManager.HasMetadata)
{
id.AmAllowedFastPieces = AllowedFastAlgorithm.Calculate(id.AddressBytes, id.TorrentManager.InfoHash, (uint)id.TorrentManager.Torrent.Pieces.Count);
}
}