public IAnnounceResponse CreateResponse(UdpAnnounceResponsePacket responsePacket)
{
UdpAnnounceResponse response = new UdpAnnounceResponse();
InternalPeerList peers = new InternalPeerList();
response.Interval = new TimeSpan(0, 0, responsePacket.interval);
response.Complete = responsePacket.seeders;
response.Incomplete = responsePacket.leechers;
foreach (UdpPeer peer in responsePacket.peers)
peers.Add(new Peer(PeerId.Empty, peer.Ip.ToString(), peer.Port));
response.Peers = new PeerList(peers);
return response;
}
public IAnnounceResponse CreateResponse(Stream responseStream)
{
using (responseStream)
{
HttpAnnounceResponse response = new HttpAnnounceResponse();
BEncodingSettings.ParserMode = BEncodingParserMode.Loose;
BEncodedDictionary responseDictionary = BEncodedDictionary.Decode(responseStream);
InternalPeerList peers = new InternalPeerList();
if (responseDictionary.ContainsKey("failure reason"))
throw new TrackerFailureException((BEncodedString)responseDictionary["failure reason"]);
if (responseDictionary["peers"] is BEncodedList)
{
BEncodedList responsePeers = (BEncodedList)responseDictionary["peers"];
foreach (BEncodedDictionary peer in responsePeers)
peers.Add(new Peer(new PeerId((BEncodedString)peer["peer id"]), (BEncodedString)peer["ip"], (BEncodedInteger)peer["port"]));
}
else if (responseDictionary["peers"] is BEncodedString)
{
BEncodedString responsePeers = ((BEncodedString)responseDictionary["peers"]);
if (responsePeers.Bytes.Length % 6 != 0)
throw new TrackerException("Invalid compact response");
for (int i = 0; i < responsePeers.Bytes.Length; i += 6)
{
byte[] ipAddress = new byte[4];
Array.Copy(responsePeers.Bytes, i, ipAddress, 0, 4);
peers.Add(new Peer(PeerId.Empty, (BEncodedString)ipAddress.ToString(), BitConverter.ToUInt16(responsePeers.Bytes, i + 4)));
}
}
else
{
throw new TrackerException("Invalid response");
}
if (!responseDictionary.ContainsKey("complete") || !responseDictionary.ContainsKey("incomplete") || !responseDictionary.ContainsKey("interval"))
throw new TrackerException("Invalid announce response");
response.Complete = (BEncodedInteger)responseDictionary["complete"];
response.Incomplete = (BEncodedInteger)responseDictionary["incomplete"];
response.Interval = TimeSpan.FromSeconds((BEncodedInteger)responseDictionary["interval"]);
response.Peers = new PeerList(peers);
return response;
}
}
