using Xmpp.Core; namespace Xmpp.Bind { private const string NS_URI = "urn:ietf:params:xml:ns:xmpp-bind"; /** The parties to a stream MUST consider resource binding as mandatory-to-negotiate. (RFC6120 7.3.1) */ public class Module : XmppStreamNegotiationModule { public const string ID = "bind_module"; public static ModuleIdentity IDENTITY = new ModuleIdentity(NS_URI, ID); private string requested_resource; public signal void bound_to_resource(XmppStream stream, string my_jid); public Module(string requested_resource) { this.requested_resource = requested_resource; } public void iq_response_stanza(XmppStream stream, Iq.Stanza iq) { var flag = Flag.get_flag(stream); if (flag == null || flag.finished) return; if (iq.type_ == Iq.Stanza.TYPE_RESULT) { flag.my_jid = iq.stanza.get_subnode("jid", NS_URI, true).get_string_content(); flag.finished = true; bound_to_resource(stream, flag.my_jid); } } public void received_features_node(XmppStream stream) { if (stream.is_setup_needed()) return; var bind = stream.features.get_subnode("bind", NS_URI); if (bind != null) { var flag = new Flag(); StanzaNode bind_node = new StanzaNode.build("bind", NS_URI).add_self_xmlns(); bind_node.put_node(new StanzaNode.build("resource", NS_URI).put_node(new StanzaNode.text(requested_resource))); stream.get_module(Iq.Module.IDENTITY).send_iq(stream, new Iq.Stanza.set(bind_node), on_bind_response); stream.add_flag(flag); } } public override void attach(XmppStream stream) { Iq.Module.require(stream); stream.received_features_node.connect(this.received_features_node); } public override void detach(XmppStream stream) { stream.received_features_node.disconnect(this.received_features_node); } public static void require(XmppStream stream) { if (stream.get_module(IDENTITY) == null) stream.add_module(new Bind.Module("")); } public override bool mandatory_outstanding(XmppStream stream) { return !Flag.has_flag(stream) || !Flag.get_flag(stream).finished; } public override bool negotiation_active(XmppStream stream) { return Flag.has_flag(stream) && !Flag.get_flag(stream).finished; } public override string get_ns() { return NS_URI; } public override string get_id() { return ID; } private static void on_bind_response(XmppStream stream, Iq.Stanza iq) { stream.get_module(Bind.Module.IDENTITY).iq_response_stanza(stream, iq); } } public class Flag : XmppStreamFlag { public const string ID = "bind"; public string? my_jid; public bool finished = false; public static Flag? get_flag(XmppStream stream) { return (Flag?) stream.get_flag(NS_URI, ID); } public static bool has_flag(XmppStream stream) { return get_flag(stream) != null; } public override string get_ns() { return NS_URI; } public override string get_id() { return ID; } } }