public void AnnounceResponseTest()
{
List<Peer> peers = new List<Peer>();
peers.Add(new Peer(new string('1', 20), new Uri("tcp://127.0.0.1:1")));
peers.Add(new Peer(new string('2', 20), new Uri("tcp://127.0.0.1:2")));
peers.Add(new Peer(new string('3', 20), new Uri("tcp://127.0.0.1:3")));
AnnounceResponseMessage m = new AnnounceResponseMessage(12345, TimeSpan.FromSeconds(10), 43, 65, peers);
AnnounceResponseMessage d = (AnnounceResponseMessage)UdpTrackerMessage.DecodeMessage(m.Encode(), 0, m.ByteLength, MessageType.Response);
Check(m, MessageType.Response);
Assert.AreEqual(1, m.Action);
Assert.AreEqual(m.Action, d.Action);
Assert.IsTrue(Toolbox.ByteMatch(m.Encode(), d.Encode()));
Assert.AreEqual(12345, d.TransactionId);
}
public static UdpTrackerMessage DecodeMessage(byte[] buffer, int offset, int count, MessageType type)
{
UdpTrackerMessage m = null;
int 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;
}
//QUICKHACK: format bencoded val and get it back wereas must refactor tracker system to have more generic object...
protected virtual void ReceiveAnnounce(AnnounceMessage announceMessage)
{
UdpTrackerMessage m;
var dict = Handle(getCollection(announceMessage), endpoint.Address, false);
if (dict.ContainsKey(RequestParameters.FailureKey))
{
m = new ErrorMessage(announceMessage.TransactionId, dict[RequestParameters.FailureKey].ToString());
}
else
{
var interval = TimeSpan.Zero;
var leechers = 0;
var seeders = 0;
var peers = new List<Client.Peer>();
foreach (var keypair in dict)
{
switch (keypair.Key.Text)
{
case "complete":
seeders = Convert.ToInt32(keypair.Value.ToString()); //same as seeder?
break;
case "incomplete":
leechers = Convert.ToInt32(keypair.Value.ToString()); //same as leecher?
break;
case "interval":
interval = TimeSpan.FromSeconds(int.Parse(keypair.Value.ToString()));
break;
case "peers":
if (keypair.Value is BEncodedList) // Non-compact response
peers.AddRange(Client.Peer.Decode((BEncodedList) keypair.Value));
else if (keypair.Value is BEncodedString) // Compact response
peers.AddRange(Client.Peer.Decode((BEncodedString) keypair.Value));
break;
default:
break;
}
}
m = new AnnounceResponseMessage(announceMessage.TransactionId, interval, leechers, seeders, peers);
}
var data = m.Encode();
listener.Send(data, data.Length, endpoint);
}
