public static UdpTrackerMessage DecodeMessage(byte[] buffer, int offset, int count, MessageType type)
{
UdpTrackerMessage m;
var action = type == MessageType.Request ? ReadInt(buffer, offset + 8) : ReadInt(buffer, offset);
switch (action)
{
case 0:
if (type == MessageType.Request)
{
m = new ConnectMessage();
}
else
{
m = new ConnectResponseMessage();
}
break;
case 1:
if (type == MessageType.Request)
{
m = new AnnounceMessage();
}
else
{
m = new AnnounceResponseMessage();
}
break;
case 2:
if (type == MessageType.Request)
{
m = new ScrapeMessage();
}
else
{
m = new ScrapeResponseMessage();
}
break;
case 3:
m = new ErrorMessage();
break;
default:
throw new ProtocolException(string.Format("Invalid udp message received: {0}", buffer[offset]));
}
try
{
m.Decode(buffer, offset, count);
}
catch
{
m = new ErrorMessage(0, "Couldn't decode the tracker response");
}
return(m);
}
public static UdpTrackerMessage DecodeMessage(byte[] buffer, int offset, int count, MessageType type)
{
UdpTrackerMessage m;
var action = type == MessageType.Request ? ReadInt(buffer, offset + 8) : ReadInt(buffer, offset);
switch (action)
{
case 0:
if (type == MessageType.Request)
m = new ConnectMessage();
else
m = new ConnectResponseMessage();
break;
case 1:
if (type == MessageType.Request)
m = new AnnounceMessage();
else
m = new AnnounceResponseMessage();
break;
case 2:
if (type == MessageType.Request)
m = new ScrapeMessage();
else
m = new ScrapeResponseMessage();
break;
case 3:
m = new ErrorMessage();
break;
default:
throw new ProtocolException(string.Format("Invalid udp message received: {0}", buffer[offset]));
}
try
{
m.Decode(buffer, offset, count);
}
catch
{
m = new ErrorMessage(0, "Couldn't decode the tracker response");
}
return m;
}
private async Task DoScrapeAsync(ScrapeParameters parameters, object state)
{
//strange because here only one infohash???
//or get all torrent infohash so loop on torrents of client engine
var infohashs = new List<byte[]>(1) {parameters.InfoHash.Hash};
var message = new ScrapeMessage(DateTime.Now.GetHashCode(), _connectionId, infohashs);
var responseBytes = await SendAndReceiveAsync(message);
var udpTrackerMessage = Receive(message, responseBytes);
if (!(udpTrackerMessage is ScrapeResponseMessage))
DoScrapeComplete(false, state);
else
CompleteScrape(udpTrackerMessage, state);
}