private void OpenHandler(object Sender, IqEventArgs e)
{
int BlockSize = XML.Attribute(e.Query, "block-size", 0);
string StreamId = XML.Attribute(e.Query, "sid");
string Stanza = XML.Attribute(e.Query, "stanza", "iq");
if (Stanza != "message" && Stanza != "iq")
{
throw new BadRequestException("Invalid stanza type.", e.IQ);
}
if (BlockSize <= 0)
{
throw new BadRequestException("Invalid block size.", e.IQ);
}
if (BlockSize > this.maxBlockSize)
{
throw new ResourceConstraintException("Requested block size too large. Maximum acceptable is " +
this.maxBlockSize.ToString(), e.IQ);
}
ValidateStreamEventHandler h = this.OnOpen;
ValidateStreamEventArgs e2 = new ValidateStreamEventArgs(this.client, e, StreamId, BlockSize);
if (h != null)
{
try
{
h(this, e2);
}
catch (Exception ex)
{
Log.Critical(ex);
}
}
if (e2.DataCallback is null || e2.CloseCallback is null)
{
throw new NotAcceptableException("Stream not expected.", e.IQ);
}
this.AssertCacheCreated();
string Key = e.From + " " + StreamId;
if (this.cache.ContainsKey(Key))
{
throw new NotAcceptableException("Stream already open.", e.IQ);
}
IncomingStream Input = new IncomingStream(e2.DataCallback, e2.CloseCallback, e2.State, BlockSize);
this.cache[Key] = Input;
e.IqResult(string.Empty);
}
private async Task QueryHandler(object Sender, IqEventArgs e)
{
string StreamId = XML.Attribute(e.Query, "sid");
XmlElement E;
if (string.IsNullOrEmpty(StreamId) || StreamId != Encoding.ASCII.GetString(Encoding.ASCII.GetBytes(StreamId)))
{
throw new NotAcceptableException("Invalid Stream ID.", e.IQ);
}
string Host = null;
string JID = null;
int Port = 0;
foreach (XmlNode N in e.Query.ChildNodes)
{
E = N as XmlElement;
if (E is null)
{
continue;
}
if (E.LocalName == "streamhost" && E.NamespaceURI == Namespace)
{
Host = XML.Attribute(E, "host");
JID = XML.Attribute(E, "jid");
Port = XML.Attribute(E, "port", 0);
break;
}
}
if (string.IsNullOrEmpty(JID) || string.IsNullOrEmpty(Host) || Port <= 0 || Port >= 0x10000)
{
throw new BadRequestException("Invalid parameters.", e.IQ);
}
ValidateStreamEventHandler h = this.OnOpen;
ValidateStreamEventArgs e2 = new ValidateStreamEventArgs(this.client, e, StreamId);
if (h != null)
{
try
{
await h(this, e2);
}
catch (Exception ex)
{
Log.Critical(ex);
}
}
if (e2.DataCallback is null || e2.CloseCallback is null)
{
throw new NotAcceptableException("Stream not expected.", e.IQ);
}
Socks5Client Client;
lock (this.streams)
{
if (this.streams.ContainsKey(StreamId))
{
throw new ConflictException("Stream already exists.", e.IQ);
}
Client = new Socks5Client(Host, Port, JID)
{
CallbackState = e2.State
};
this.streams[StreamId] = Client;
}
Client.Tag = new Socks5QueryState()
{
streamId = StreamId,
eventargs = e,
eventargs2 = e2
};
Client.OnDataReceived += e2.DataCallback;
Client.OnStateChange += this.ClientStateChanged;
}
