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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;
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).add_transport(stream, 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 Jingle.TransportType transport_type() {
return Jingle.TransportType.STREAMING;
}
public StanzaNode to_transport_stanza_node() {
return new StanzaNode.build("transport", NS_URI)
.add_self_xmlns()
.put_attribute("block-size", DEFAULT_BLOCKSIZE.to_string())
.put_attribute("sid", random_uuid());
}
public Jingle.Connection? create_transport_connection(XmppStream stream, Jid peer_full_jid, StanzaNode content) throws Jingle.CreateConnectionError {
StanzaNode? transport = content.get_subnode("transport", NS_URI);
if (transport == null) {
return null;
}
string? sid = transport.get_attribute("sid");
int block_size = transport.get_attribute_int("block-size");
if (sid == null || block_size <= 0) {
throw new Jingle.CreateConnectionError.BAD_REQUEST("Invalid IBB parameters");
}
if (block_size > DEFAULT_BLOCKSIZE) {
throw new Jingle.CreateConnectionError.NOT_ACCEPTABLE("Invalid IBB parameters: peer increased block size");
}
return new Connection(peer_full_jid, new InBandBytestreams.Connection(peer_full_jid, sid, block_size));
}
}
public class Connection : Jingle.Connection {
InBandBytestreams.Connection inner;
public Connection(Jid full_jid, InBandBytestreams.Connection inner) {
base(full_jid);
inner.on_error.connect((stream, error) => on_error(stream, new Jingle.Error.TRANSPORT_ERROR(error)));
inner.on_data.connect((stream, data) => on_data(stream, data));
inner.on_ready.connect((stream) => on_ready(stream));
this.inner = inner;
}
public override void connect(XmppStream stream) {
inner.connect(stream);
}
public override void send(XmppStream stream, uint8[] data) {
inner.send(stream, data);
}
public override void close(XmppStream stream) {
inner.close(stream);
}
}
}
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