1 files changed, 93 insertions, 0 deletions
diff --git a/xmpp-vala/src/module/bind.vala b/xmpp-vala/src/module/bind.vala
new file mode 100644
index 00000000..d01fda7a
--- /dev/null
+++ b/xmpp-vala/src/module/bind.vala
@@ -0,0 +1,93 @@
+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";
+
+        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()
+                                        .put_node(new StanzaNode.build("resource", NS_URI).put_node(new StanzaNode.text(requested_resource)));
+                Iq.Module.get_module(stream).send_iq(stream, new Iq.Stanza.set(bind_node), new IqResponseListenerImpl());
+                stream.add_flag(flag);
+            }
+        }
+
+        private class IqResponseListenerImpl : Iq.ResponseListener, Object {
+            public void on_result(XmppStream stream, Iq.Stanza iq) {
+                Bind.Module.get_module(stream).iq_response_stanza(stream, iq);
+            }
+        }
+
+        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 Module? get_module(XmppStream stream) {
+            return (Module?) stream.get_module(NS_URI, ID);
+        }
+
+        public static void require(XmppStream stream) {
+            if (get_module(stream) == 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; }
+    }
+
+    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; }
+    }
+}