private void OnReceiveCallBack(IAsyncResult ar)
{
UdpClient u = (UdpClient)ar.AsyncState;
IPEndPoint e = new IPEndPoint(IPAddress.Any, 0);
try
{
byte[] receiveBytes = u.EndReceive(ar, ref e);
string receiveString = Encoding.ASCII.GetString(receiveBytes);
Regex exp = new Regex("BT-SEARCH \\* HTTP/1.1\\r\\nHost: 239.192.152.143:6771\\r\\nPort: (?<port>[^@]+)\\r\\nInfohash: (?<hash>[^@]+)\\r\\n\\r\\n\\r\\n");
Match match = exp.Match(receiveString);
if (!match.Success)
{
return;
}
int portcheck = Convert.ToInt32(match.Groups["port"].Value);
if (portcheck < 0 || portcheck > 65535)
{
return;
}
TorrentManager manager = null;
InfoHash matchHash = InfoHash.FromHex(match.Groups["hash"].Value);
for (int i = 0; manager == null && i < engine.Torrents.Count; i++)
{
if (engine.Torrents [i].InfoHash == matchHash)
{
manager = engine.Torrents [i];
}
}
if (manager == null)
{
return;
}
Uri uri = new Uri("tcp://" + e.Address.ToString() + ':' + match.Groups["port"].Value);
Peer peer = new Peer("", uri, EncryptionTypes.All);
// Add new peer to matched Torrent
if (!manager.HasMetadata || !manager.Torrent.IsPrivate)
{
ClientEngine.MainLoop.Queue(delegate {
int count = manager.AddPeersCore(peer);
manager.RaisePeersFound(new LocalPeersAdded(manager, count, 1));
});
}
}
catch
{
// Failed to receive data, ignore
}
finally
{
try
{
u.BeginReceive(OnReceiveCallBack, ar.AsyncState);
}
catch
{
// It's closed
}
}
}