1 files changed, 77 insertions, 0 deletions
diff --git a/xmpp-vala/src/module/xep/0261_jingle_in_band_bytestreams.vala b/xmpp-vala/src/module/xep/0261_jingle_in_band_bytestreams.vala
new file mode 100644
index 00000000..dc2e8d7c
--- /dev/null
+++ b/xmpp-vala/src/module/xep/0261_jingle_in_band_bytestreams.vala
@@ -0,0 +1,77 @@
+using Xmpp;
+using Xmpp.Xep;
+
+namespace Xmpp.Xep.JingleInBandBytestreams {
+
+private const string NS_URI = "urn:xmpp:jingle:transports:ibb:1";
+private const int DEFAULT_BLOCKSIZE = 4096;
+private const int MAX_BLOCKSIZE = 65535;
+
+public class Module : Jingle.Transport, XmppStreamModule {
+    public static Xmpp.ModuleIdentity<Module> IDENTITY = new Xmpp.ModuleIdentity<Module>(NS_URI, "0261_jingle_in_band_bytestreams");
+
+    public override void attach(XmppStream stream) {
+        stream.get_module(Jingle.Module.IDENTITY).register_transport(this);
+        stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI);
+    }
+    public override void detach(XmppStream stream) { }
+
+    public override string get_ns() { return NS_URI; }
+    public override string get_id() { return IDENTITY.id; }
+
+    public bool is_transport_available(XmppStream stream, Jid full_jid) {
+        bool? result = stream.get_flag(ServiceDiscovery.Flag.IDENTITY).has_entity_feature(full_jid, NS_URI);
+        return result != null && result;
+    }
+
+    public string transport_ns_uri() {
+        return NS_URI;
+    }
+    public Jingle.TransportType transport_type() {
+        return Jingle.TransportType.STREAMING;
+    }
+    public Jingle.TransportParameters create_transport_parameters() {
+        return new Parameters(random_uuid(), DEFAULT_BLOCKSIZE);
+    }
+    public Jingle.TransportParameters parse_transport_parameters(StanzaNode transport) throws Jingle.IqError {
+        return Parameters.parse(transport);
+    }
+}
+
+class Parameters : Jingle.TransportParameters, Object {
+    public string sid { get; private set; }
+    public int block_size { get; private set; }
+    public Parameters(string sid, int block_size) {
+        this.sid = sid;
+        this.block_size = block_size;
+    }
+    public static Parameters parse(StanzaNode transport) throws Jingle.IqError {
+        string? sid = transport.get_attribute("sid");
+        int block_size = transport.get_attribute_int("block-size");
+        if (sid == null || block_size <= 0 || block_size > MAX_BLOCKSIZE) {
+            throw new Jingle.IqError.BAD_REQUEST("missing or invalid sid or blocksize");
+        }
+        return new Parameters(sid, block_size);
+    }
+    public string transport_ns_uri() {
+        return NS_URI;
+    }
+    public StanzaNode to_transport_stanza_node() {
+        return new StanzaNode.build("transport", NS_URI)
+            .add_self_xmlns()
+            .put_attribute("block-size", block_size.to_string())
+            .put_attribute("sid", sid);
+    }
+    public void update_transport(StanzaNode transport) throws Jingle.IqError {
+        Parameters other = Parameters.parse(transport);
+        if (other.sid != sid || other.block_size > block_size) {
+            throw new Jingle.IqError.NOT_ACCEPTABLE("invalid IBB sid or block_size");
+        }
+        block_size = other.block_size;
+    }
+    public IOStream create_transport_connection(XmppStream stream, Jid peer_full_jid, Jingle.Role role) {
+        return InBandBytestreams.Connection.create(stream, peer_full_jid, sid, block_size, role == Jingle.Role.INITIATOR);
+    }
+}
+
+}