using Gee; namespace Xmpp.Core { public errordomain IOStreamError { READ, WRITE, CONNECT, DISCONNECT } public class XmppStream { private static string NS_URI = "http://etherx.jabber.org/streams"; public string remote_name; public bool debug = false; public StanzaNode? features { get; private set; default = new StanzaNode.build("features", NS_URI); } private IOStream? stream; private StanzaReader? reader; private StanzaWriter? writer; private ArrayList flags = new ArrayList(); private ArrayList modules = new ArrayList(); private bool setup_needed = false; private bool negotiation_complete = false; public signal void received_node(XmppStream stream, StanzaNode node); public signal void received_root_node(XmppStream stream, StanzaNode node); public signal void received_features_node(XmppStream stream); public signal void received_message_stanza(XmppStream stream, StanzaNode node); public signal void received_presence_stanza(XmppStream stream, StanzaNode node); public signal void received_iq_stanza(XmppStream stream, StanzaNode node); public signal void received_nonza(XmppStream stream, StanzaNode node); public signal void stream_negotiated(XmppStream stream); public void connect(string? remote_name = null) throws IOStreamError { if (remote_name != null) this.remote_name = remote_name; SocketClient client = new SocketClient(); try { SocketConnection? stream = client.connect(new NetworkService("xmpp-client", "tcp", this.remote_name)); if (stream == null) throw new IOStreamError.CONNECT("client.connect() returned null"); reset_stream(stream); } catch (Error e) { stderr.printf("CONNECTION LOST?\n"); throw new IOStreamError.CONNECT(e.message); } loop(); } public void disconnect() throws IOStreamError { if (writer == null) throw new IOStreamError.DISCONNECT("trying to disconnect, but no stream open"); if (debug) stderr.puts("OUT\n\n"); writer.write.begin(""); reader.cancel(); stream.close_async.begin(); } public void reset_stream(IOStream stream) { this.stream = stream; reader = new StanzaReader.for_stream(stream.input_stream); writer = new StanzaWriter.for_stream(stream.output_stream); require_setup(); } public void require_setup() { setup_needed = true; } public bool is_setup_needed() { return setup_needed; } public StanzaNode read() throws IOStreamError { if (reader == null) throw new IOStreamError.READ("trying to read, but no stream open"); try { var node = reader.read_node(); if (debug) stderr.printf("IN\n%s\n", node.to_string()); return node; } catch (XmlError e) { throw new IOStreamError.READ(e.message); } } public void write(StanzaNode node) throws IOStreamError { if (writer == null) throw new IOStreamError.WRITE("trying to write, but no stream open"); try { if (debug) stderr.printf("OUT\n%s\n", node.to_string()); writer.write_node(node); } catch (XmlError e) { throw new IOStreamError.WRITE(e.message); } } public IOStream? get_stream() { return stream; } public void add_flag(XmppStreamFlag flag) { flags.add(flag); } public XmppStreamFlag? get_flag(string ns, string id) { foreach (var flag in flags) { if (flag.get_ns() == ns && flag.get_id() == id) { return flag; } } return null; } public void remove_flag(XmppStreamFlag flag) { flags.remove(flag); } public XmppStream add_module(XmppStreamModule module) { modules.add(module); if (negotiation_complete || module as XmppStreamNegotiationModule != null) { module.attach(this); } return this; } public void remove_modules() { foreach (XmppStreamModule module in modules) module.detach(this); } public T? get_module(ModuleIdentity? identity) { if (identity == null) return null; foreach (var module in modules) { if (identity.matches(module)) return identity.cast(module); } return null; } private void setup() throws IOStreamError { var outs = new StanzaNode.build("stream", "http://etherx.jabber.org/streams") .put_attribute("to", remote_name) .put_attribute("version", "1.0") .put_attribute("xmlns", "jabber:client") .put_attribute("stream", "http://etherx.jabber.org/streams", XMLNS_URI); outs.has_nodes = true; write(outs); received_root_node(this, read_root()); } private void loop() throws IOStreamError { while(true) { if (setup_needed) { setup(); setup_needed = false; } StanzaNode node = read(); received_node(this, node); if (node.ns_uri == NS_URI && node.name == "features") { features = node; received_features_node(this); } else if (node.ns_uri == NS_URI && node.name == "stream" && node.pseudo) { print("disconnect\n"); disconnect(); return; } else if (node.ns_uri == JABBER_URI) { if (node.name == "message") { received_message_stanza(this, node); } else if (node.name == "presence") { received_presence_stanza(this, node); } else if (node.name == "iq") { received_iq_stanza(this, node); } else { received_nonza(this, node); } } else { received_nonza(this, node); } if (!negotiation_complete && negotiation_modules_done()) { negotiation_complete = true; attach_non_negotation_modules(); stream_negotiated(this); } } } private bool negotiation_modules_done() throws IOStreamError { if (!setup_needed) { bool mandatory_outstanding = false; bool negotiation_active = false; foreach (XmppStreamModule module in modules) { XmppStreamNegotiationModule negotiation_module = module as XmppStreamNegotiationModule; if (negotiation_module != null) { if (negotiation_module.negotiation_active(this)) negotiation_active = true; if (negotiation_module.mandatory_outstanding(this)) mandatory_outstanding = true; } } if (!negotiation_active) { if (mandatory_outstanding) { throw new IOStreamError.CONNECT("mandatory-to-negotiate feature not negotiated"); } else { return true; } } } return false; } private void attach_non_negotation_modules() { foreach (XmppStreamModule module in modules) { if (module as XmppStreamNegotiationModule == null) { module.attach(this); } } } private StanzaNode read_root() throws IOStreamError { try { var node = reader.read_root_node(); if (debug) stderr.printf("IN\n%s\n", node.to_string()); return node; } catch (XmlError e) { throw new IOStreamError.READ(e.message); } } } public abstract class XmppStreamFlag { public abstract string get_ns(); public abstract string get_id(); } public class ModuleIdentity : Object { public string ns { get; private set; } public string id { get; private set; } public ModuleIdentity(string ns, string id) { this.ns = ns; this.id = id; } public T? cast(XmppStreamModule module) { return (T?) module; } public bool matches(XmppStreamModule module) { return module.get_ns() == ns && module.get_id() == id; } } public abstract class XmppStreamModule : Object { public abstract void attach(XmppStream stream); public abstract void detach(XmppStream stream); public abstract string get_ns(); public abstract string get_id(); } public abstract class XmppStreamNegotiationModule : XmppStreamModule { public abstract bool mandatory_outstanding(XmppStream stream); public abstract bool negotiation_active(XmppStream stream); } }