private IQ ProcessBind(XmppStream stream, IQ iq, XmppHandlerContext context)
{
if (iq.Type != IqType.set)
{
return(XmppStanzaError.ToBadRequest(iq));
}
var answer = new IQ(IqType.result);
answer.Id = iq.Id;
var bind = (Bind)iq.Bind;
var resource = !string.IsNullOrEmpty(bind.Resource) ? bind.Resource : stream.User;
if (bind.TagName.Equals("bind", StringComparison.OrdinalIgnoreCase))
{
var jid = new Jid(stream.User, stream.Domain, resource);
var session = context.SessionManager.GetSession(jid);
if (session != null)
{
if (session.Stream.Id != stream.Id)
{
context.Sender.SendToAndClose(session.Stream, XmppStreamError.Conflict);
answer.AddTag("newTalkWindow", "true");
}
else
{
return(XmppStanzaError.ToConflict(iq));
}
}
stream.BindResource(resource);
context.SessionManager.AddSession(new XmppSession(jid, stream));
answer.Bind = new Bind(jid);
}
else if (bind.TagName.Equals("unbind", StringComparison.OrdinalIgnoreCase))
{
if (!stream.Resources.Contains(resource))
{
return(XmppStanzaError.ToNotFound(iq));
}
context.SessionManager.CloseSession(iq.From);
stream.UnbindResource(resource);
if (stream.Resources.Count == 0)
{
context.Sender.CloseStream(stream);
}
}
else
{
return(XmppStanzaError.ToBadRequest(iq));
}
if (stream.MultipleResources)
{
answer.To = iq.From;
}
return(answer);
}
private Element ValidateClientStanza(Stanza stanza, XmppStream stream)
{
if (!stream.Authenticated)
{
if (!(stanza is AuthIq) && (stanza is IQ && !(((IQ)stanza).Query is Register)))
{
return(XmppStanzaError.ToNotAuthorized(stanza));
}
}
//remove empty jids
if (stanza.HasFrom && string.IsNullOrEmpty(stanza.From.ToString()))
{
stanza.From = null;
}
if (stanza.HasTo && string.IsNullOrEmpty(stanza.To.ToString()))
{
stanza.To = null;
}
//prep strings
stanza.From = NodePrep(stanza.From);
stanza.To = NodePrep(stanza.To);
if (!ValidateJid(stanza.From) || !ValidateJid(stanza.To))
{
return(XmppStanzaError.ToBadRequest(stanza));
}
if (stanza.HasFrom)
{
if (!stream.JidBinded(stanza.From))
{
// return null if we have from in bind iq (for qutIM 0.3 client)
if (!(stanza is IQ) || ((IQ)stanza).Bind == null || ((IQ)stanza).Bind.Resource != stanza.From.Resource)
{
return(XmppStreamError.InvalidFrom);
}
}
}
else
{
if (stream.MultipleResources)
{
return(XmppStanzaError.ToConflict(stanza));
}
stanza.From = new Jid(string.Format("{0}@{1}/{2}", stream.User, stream.Domain, 0 < stream.Resources.Count ? stream.Resources[0] : null));
}
if (stanza is Message)
{
var message = (Message)stanza;
if (message.Type == MessageType.chat && message.To == null)
{
return(XmppStanzaError.ToRecipientUnavailable(stanza));
}
}
return(null);
}
public override void ElementHandle(XmppStream stream, Element element, XmppHandlerContext context)
{
var iq = (AuthIq)element;
if (stream.Authenticated)
{
context.Sender.SendTo(stream, XmppStanzaError.ToConflict(iq));
return;
}
if (iq.Type == IqType.get)
{
ProcessAuthIQGet(stream, iq, context);
}
else if (iq.Type == IqType.set)
{
ProcessAuthIQSet(stream, iq, context);
}
else
{
context.Sender.SendTo(stream, XmppStanzaError.ToNotAcceptable(iq));
}
}
private IQ SetRegister(XmppStream stream, IQ iq, XmppHandlerContext context)
{
var register = (Register)iq.Query;
iq.Type = IqType.result;
if (register.RemoveAccount)
{
if (!stream.Authenticated || !iq.From.HasUser)
{
context.Sender.SendToAndClose(stream, XmppStreamError.NotAuthorized);
}
context.UserManager.RemoveUser(iq.From);
foreach (var s in context.SessionManager.GetBareJidSessions(iq.From))
{
if (s.Stream.Id == stream.Id)
{
continue;
}
context.Sender.SendToAndClose(s.Stream, XmppStreamError.Conflict);
}
//TODO: remove roster subscriptions
register.RemoveAllChildNodes();
iq.SwitchDirection();
return(iq);
}
if (string.IsNullOrEmpty(register.Username) ||
string.IsNullOrEmpty(register.Password) ||
Stringprep.NamePrep(register.Username) != register.Username)
{
var error = XmppStanzaError.ToNotAcceptable(iq);
if (string.IsNullOrEmpty(register.Username))
{
error.Error.Message = "Empty required field Username.";
}
else if (string.IsNullOrEmpty(register.Password))
{
error.Error.Message = "Empty required field Password.";
}
else if (Stringprep.NamePrep(register.Username) != register.Username)
{
error.Error.Message = "Invalid character.";
}
return(error);
}
var userJid = new Jid(register.Username, stream.Domain, null);
if (context.UserManager.IsUserExists(userJid))
{
return(XmppStanzaError.ToConflict(iq));
}
var user = new User(userJid, register.Password);
context.UserManager.SaveUser(user);
register.RemoveAllChildNodes();
if (stream.Authenticated)
{
iq.SwitchDirection();
}
else
{
iq.To = null;
}
iq.From = null;
return(iq);
}
