/// <summary>
/// Informs the client that an XML element was received and
/// invokes the OnProtocol event.
/// </summary>
/// <param name="sender">The object that called this method.</param>
/// <param name="tag">XML element that contains the new tag.</param>
protected virtual void OnElement(object sender, System.Xml.XmlElement tag)
{
//Debug.WriteLine(tag.OuterXml);
if (tag is jabber.protocol.stream.Error)
{
// Stream error. Race condition! Two cases:
// 1) OnClose has already fired, in which case we are in ClosedState, and the reconnect timer is pending.
// 2) OnClose hasn't fired, in which case we trick it into not starting the reconnect timer.
lock (m_stateLock)
{
if (m_state != ClosedState.Instance)
{
State = ClosingState.Instance;
}
else if (m_reconnectTimer != null)
{
Debug.WriteLine("Disposing of timer");
m_reconnectTimer.Dispose();
}
}
if (OnStreamError != null)
{
if (InvokeRequired)
CheckedInvoke(OnStreamError, new object[] { this, tag });
else
OnStreamError(this, tag);
}
return;
}
if (State == ServerFeaturesState.Instance)
{
Features f = tag as Features;
if (f == null)
{
FireOnError(new InvalidOperationException("Expecting stream:features from a version='1.0' server"));
return;
}
m_features = f;
ProcessFeatures();
return;
}
else if (State == SASLState.Instance)
{
if (tag is Success)
{
// restart the stream again
SendNewStreamHeader();
}
else if (tag is SASLFailure)
{
m_saslProc = null;
lock (m_stateLock)
{
State = SASLFailedState.Instance;
}
SASLFailure sf = tag as SASLFailure;
// TODO: I18N
if (OnSASLError != null)
{
m_reconnect = false;
OnSASLError(this, sf);
}
else
FireOnError(new SASLException("SASL failure: " + sf.InnerXml));
return;
}
else if (tag is Step)
{
try
{
Step s = m_saslProc.step(tag as Step, this.Document);
if (s != null)
Write(s);
}
catch (Exception e)
{
FireOnError(new SASLException(e.Message));
return;
}
}
else
{
m_saslProc = null;
FireOnError(new SASLException("Invalid SASL protocol"));
return;
}
}
else if (State == StartTLSState.Instance)
{
switch (tag.Name)
{
case "proceed":
if (!StartTLS())
return;
SendNewStreamHeader();
break;
case "failure":
FireOnError(new AuthenticationFailedException());
return;
}
}
else if (State == CompressionState.Instance)
{
switch (tag.Name)
{
case "compressed":
if (!StartCompression())
return;
SendNewStreamHeader();
break;
case "failure":
CompressionFailure fail = tag as CompressionFailure;
FireOnError(new bedrock.io.CompressionFailedException(fail.Error));
return;
}
}
else if (State == SASLAuthedState.Instance)
{
Features f = tag as Features;
if (f == null)
{
FireOnError(new InvalidOperationException("Expecting stream:features from a version='1.0' server"));
return;
}
if (OnSASLEnd != null)
OnSASLEnd(this, f);
m_saslProc = null;
}
else
{
if (OnProtocol != null)
{
if (InvokeRequired)
CheckedInvoke(OnProtocol, new object[] { this, tag });
else
OnProtocol(this, tag);
}
}
CheckAll(tag);
}
/// <summary>
/// Got the stream:stream. Start the handshake.
/// </summary>
/// <param name="sender"></param>
/// <param name="tag"></param>
protected override void OnDocumentStart(object sender, System.Xml.XmlElement tag)
{
base.OnDocumentStart(sender, tag);
if (this.Type == ComponentType.Connect)
{
lock (StateLock)
{
State = HandshakingState.Instance;
}
jabber.protocol.stream.Stream str = new jabber.protocol.stream.Stream(this.Document, NS);
str.To = this.ComponentID;
this.StreamID = str.ID;
if (ServerVersion.StartsWith("1."))
str.Version = "1.0";
WriteStartTag(str);
if (ServerVersion.StartsWith("1."))
{
Features f = new Features(this.Document);
if (AutoStartTLS && !SSLon && (this[Options.LOCAL_CERTIFICATE] != null))
f.StartTLS = new StartTLS(this.Document);
Write(f);
}
}
}
private void FakeTimer(object state)
{
// HACK: stream restart is null for older versions of XEP-124.
if (!FakeReceivedStream())
return;
Features f = new Features(m_doc);
f.AddChild(new Bind(m_doc));
f.AddChild(new Session(m_doc));
byte[] p = ENC.GetBytes(f.OuterXml);
if (!m_listener.OnRead(this, p, 0, p.Length))
{
Close();
return;
}
}