diff options
Diffstat (limited to 'xmpp-vala/src/module/xep/0272_muji.vala')
| -rw-r--r-- | xmpp-vala/src/module/xep/0272_muji.vala | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/xmpp-vala/src/module/xep/0272_muji.vala b/xmpp-vala/src/module/xep/0272_muji.vala new file mode 100644 index 00000000..2bdc068e --- /dev/null +++ b/xmpp-vala/src/module/xep/0272_muji.vala @@ -0,0 +1,286 @@ +using Gee; +namespace Xmpp.Xep.Muji { + + public const string NS_URI = "http://telepathy.freedesktop.org/muji"; + + public class Module : XmppStreamModule { + public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "0272_muji"); + + public async GroupCall? join_call(XmppStream stream, Jid muc_jid, bool video) { + StanzaNode initial_muji_node = new StanzaNode.build("muji", NS_URI).add_self_xmlns() + .put_node(new StanzaNode.build("preparing", NS_URI)); + + var group_call = new GroupCall(muc_jid); + stream.get_flag(Flag.IDENTITY).calls[muc_jid] = group_call; + + group_call.our_nick = "%08x".printf(Random.next_int()); + debug(@"[%s] MUJI joining as %s", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), group_call.our_nick); + Xep.Muc.JoinResult? result = yield stream.get_module(Muc.Module.IDENTITY).enter(stream, muc_jid, group_call.our_nick, null, null, initial_muji_node); + if (result == null || result.nick == null) return null; + debug(@"[%s] MUJI joining as %s done", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), group_call.our_nick); + + // Determine all participants that have finished preparation. Those are the ones we have to initiate the call with. + Gee.List<Presence.Stanza> other_presences = yield wait_for_preparing_peers(stream, muc_jid); + var finished_real_jids = new ArrayList<Jid>(Jid.equals_func); + foreach (Presence.Stanza presence in other_presences) { + if (presence.stanza.get_deep_subnode(NS_URI + ":muji", NS_URI + ":preparing") != null) continue; + Jid? real_jid = stream.get_flag(Muc.Flag.IDENTITY).get_real_jid(presence.from); + if (real_jid == null) { + warning("Don't know the real jid for %s", presence.from.to_string()); + continue; + } + finished_real_jids.add(real_jid); + } + group_call.peers_to_connect_to.add_all(finished_real_jids); + + // Build+send our own MUJI presence + StanzaNode muji_node = new StanzaNode.build("muji", NS_URI).add_self_xmlns(); + + foreach (string media in video ? new string[] { "audio", "video" } : new string[] { "audio" }) { + StanzaNode content_node = new StanzaNode.build("content", Xep.Jingle.NS_URI).add_self_xmlns() + .put_attribute("name", media); + StanzaNode description_node = new StanzaNode.build("description", Xep.JingleRtp.NS_URI).add_self_xmlns() + .put_attribute("media", media); + content_node.put_node(description_node); + + Gee.List<Xep.JingleRtp.PayloadType> payload_types = null; + if (other_presences.is_empty) { + payload_types = yield stream.get_module(Xep.JingleRtp.Module.IDENTITY).get_supported_payloads(media); + } else { + yield compute_payload_intersection(stream, group_call, media); + payload_types = group_call.current_payload_intersection[media]; + } + foreach (Xep.JingleRtp.PayloadType payload_type in payload_types) { + description_node.put_node(payload_type.to_xml().add_self_xmlns()); + } + muji_node.put_node(content_node); + } + + Presence.Stanza presence_stanza = new Presence.Stanza() { to=muc_jid.with_resource(group_call.our_nick) }; + presence_stanza.stanza.put_node(muji_node); + stream.get_module(Presence.Module.IDENTITY).send_presence(stream, presence_stanza); + + return group_call; + } + + private async Gee.List<Presence.Stanza> wait_for_preparing_peers(XmppStream stream, Jid muc_jid) { + var promise = new Promise<Gee.List<Presence.Stanza>>(); + + ArrayList<Jid> preparing_peers = new ArrayList<Jid>(Jid.equals_func); + + Gee.List<Presence.Stanza> presences = get_other_presences(stream, muc_jid); + + foreach (Presence.Stanza presence in presences) { + StanzaNode? preparing_node = presence.stanza.get_deep_subnode(NS_URI + ":muji", NS_URI + ":preparing"); + if (preparing_node != null) { + preparing_peers.add(presence.from); + } + } + + debug("[%s] MUJI waiting for %i/%i peers", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), preparing_peers.size, presences.size); + + if (preparing_peers.is_empty) { + return presences; + } + + GroupCall group_call = stream.get_flag(Flag.IDENTITY).calls[muc_jid]; + group_call.waiting_for_finish_prepares[promise] = preparing_peers; + + return yield promise.future.wait_async(); + } + + private async void compute_payload_intersection(XmppStream stream, GroupCall group_call, string media) { + Gee.List<Presence.Stanza> presences = get_other_presences(stream, group_call.muc_jid); + if (presences.is_empty) return; + + Gee.List<Xep.JingleRtp.PayloadType> intersection = parse_payload_types(stream, media, presences[0]); + var remove_payloads = new ArrayList<Xep.JingleRtp.PayloadType>(); + + // Check if all peers support the payloads + foreach (Presence.Stanza presence in presences) { + Gee.List<Xep.JingleRtp.PayloadType> peer_payload_types = parse_payload_types(stream, media, presence); + + foreach (Xep.JingleRtp.PayloadType payload_type in intersection) { + if (!peer_payload_types.contains(payload_type)) { + remove_payloads.add(payload_type); + } + } + } + // Check if we support the payloads + foreach (Xep.JingleRtp.PayloadType payload_type in intersection) { + if (!yield stream.get_module(Xep.JingleRtp.Module.IDENTITY).is_payload_supported(media, payload_type)) { + remove_payloads.add(payload_type); + } + } + // Remove payloads not supported by everyone + foreach (Xep.JingleRtp.PayloadType payload_type in remove_payloads) { + intersection.remove(payload_type); + } + + // Check if the payload intersection changed (if so: notify) + bool changed = !group_call.current_payload_intersection.has_key(media) || + !group_call.current_payload_intersection[media].contains_all(intersection) || + !intersection.contains_all(group_call.current_payload_intersection[media]); + + if (changed) { + group_call.current_payload_intersection[media] = intersection; + group_call.codecs_changed(intersection); + } + } + + private Gee.List<Xep.JingleRtp.PayloadType> parse_payload_types(XmppStream stream, string media, Presence.Stanza presence) { + Gee.List<Xep.JingleRtp.PayloadType> ret = new ArrayList<Xep.JingleRtp.PayloadType>(Xep.JingleRtp.PayloadType.equals_func); + + foreach (StanzaNode content_node in presence.stanza.get_deep_subnodes(NS_URI + ":muji", Xep.Jingle.NS_URI + ":content")) { + StanzaNode? description_node = content_node.get_subnode("description", Xep.JingleRtp.NS_URI); + if (description_node == null) continue; + + if (description_node.get_attribute("media") == media) { + Gee.List<StanzaNode> payload_nodes = description_node.get_subnodes("payload-type", Xep.JingleRtp.NS_URI); + foreach (StanzaNode payload_node in payload_nodes) { + Xep.JingleRtp.PayloadType payload_type = Xep.JingleRtp.PayloadType.parse(payload_node); + ret.add(payload_type); + } + } + } + return ret; + } + + private void on_received_available(XmppStream stream, Presence.Stanza presence) { + StanzaNode? muji_node = presence.stanza.get_subnode("muji", NS_URI); + if (muji_node == null) return; + + var flag = stream.get_flag(Flag.IDENTITY); + GroupCall? group_call = flag.calls.get(presence.from.bare_jid); + if (group_call == null) return; + + if (presence.from.resourcepart == group_call.our_nick) return; + + foreach (StanzaNode content_node in muji_node.get_subnodes("content", Xep.Jingle.NS_URI)) { + StanzaNode? description_node = content_node.get_subnode("description", Xep.JingleRtp.NS_URI); + if (description_node == null) continue; + + string? media = description_node.get_attribute("media"); + if (media == null) continue; + + compute_payload_intersection.begin(stream, group_call, media); + } + + StanzaNode? prepare_node = muji_node.get_subnode("preparing", NS_URI); + if (prepare_node == null) { + on_jid_finished_preparing(stream, presence.from, group_call); + + if (!group_call.peers.contains(presence.from)) { + // A new peer finished preparing + Jid? real_jid = stream.get_flag(Muc.Flag.IDENTITY).get_real_jid(presence.from); + if (real_jid == null) { + warning("Don't know the real jid for %s", presence.from.to_string()); + return; + } + debug("Muji peer joined %s / %s\n", real_jid.to_string(), presence.from.to_string()); + group_call.peers.add(presence.from); + group_call.real_jids[presence.from] = real_jid; + group_call.peer_joined(real_jid); + } + } + } + + private void on_received_unavailable(XmppStream stream, Presence.Stanza presence) { + Flag flag = stream.get_flag(Flag.IDENTITY); + GroupCall? group_call = flag.calls[presence.from.bare_jid]; + if (group_call == null) return; + + debug("Muji peer left %s / %s", group_call.real_jids.has_key(presence.from) ? group_call.real_jids[presence.from].to_string() : "Unknown real JID", presence.from.to_string()); + on_jid_finished_preparing(stream, presence.from, group_call); + group_call.peers.remove(presence.from); + group_call.peers_to_connect_to.remove(presence.from); + if (group_call.real_jids.has_key(presence.from)) { + group_call.peer_left(group_call.real_jids[presence.from]); + } + group_call.real_jids.remove(presence.from); + } + + private void on_jid_finished_preparing(XmppStream stream, Jid jid, GroupCall group_call) { + debug("Muji peer finished preparing %s", jid.to_string()); + foreach (Promise<Gee.List<Presence.Stanza>> promise in group_call.waiting_for_finish_prepares.keys) { + debug("Waiting for finish prepares %i", group_call.waiting_for_finish_prepares[promise].size); + Gee.List<Jid> outstanding_prepares = group_call.waiting_for_finish_prepares[promise]; + if (outstanding_prepares.contains(jid)) { + outstanding_prepares.remove(jid); + debug("Waiting for finish prepares %i", group_call.waiting_for_finish_prepares[promise].size); + + if (outstanding_prepares.is_empty) { + Gee.List<Presence.Stanza> presences = get_other_presences(stream, jid.bare_jid); + promise.set_value(presences); + } + } + } + } + + private Gee.List<Presence.Stanza> get_other_presences(XmppStream stream, Jid muc_jid) { + Gee.List<Presence.Stanza> presences = stream.get_flag(Presence.Flag.IDENTITY).get_presences(muc_jid); + string? own_nick = stream.get_flag(Flag.IDENTITY).calls[muc_jid].our_nick; + + var remove_presences = new ArrayList<Presence.Stanza>(); + foreach (Presence.Stanza presence in presences) { + if (presence.from.resourcepart == own_nick) { + remove_presences.add(presence); + } + StanzaNode? muji_node = presence.stanza.get_subnode("muji", NS_URI); + if (muji_node == null) { + remove_presences.add(presence); + } + } + presences.remove_all(remove_presences); + return presences; + } + + public override void attach(XmppStream stream) { + stream.add_flag(new Flag()); + stream.get_module(Presence.Module.IDENTITY).received_available.connect(on_received_available); + stream.get_module(Presence.Module.IDENTITY).received_unavailable.connect(on_received_unavailable); + } + + public override void detach(XmppStream stream) { } + + public override string get_ns() { + return NS_URI; + } + + public override string get_id() { + return IDENTITY.id; + } + } + + public class GroupCall { + public string our_nick; + public Jid muc_jid; + public ArrayList<Jid> peers_to_connect_to = new ArrayList<Jid>(Jid.equals_func); + public ArrayList<Jid> peers = new ArrayList<Jid>(Jid.equals_func); + public HashMap<Jid, Jid> real_jids = new HashMap<Jid, Jid>(Jid.hash_func, Jid.equals_func); + public HashMap<Promise, Gee.List<Jid>> waiting_for_finish_prepares = new HashMap<Promise, Gee.List<Jid>>(); + public HashMap<string, Gee.List<Xep.JingleRtp.PayloadType>> current_payload_intersection = new HashMap<string, Gee.List<Xep.JingleRtp.PayloadType>>(); + + public signal void peer_joined(Jid real_jid); + public signal void peer_left(Jid real_jid); + public signal void codecs_changed(Gee.List<Xep.JingleRtp.PayloadType> payload_types); + + public GroupCall(Jid muc_jid) { + this.muc_jid = muc_jid; + } + + public void leave(XmppStream stream) { + stream.get_module(Xep.Muc.Module.IDENTITY).exit(stream, muc_jid); + stream.get_flag(Flag.IDENTITY).calls.unset(muc_jid); + } + } + + public class Flag : XmppStreamFlag { + public static FlagIdentity<Flag> IDENTITY = new FlagIdentity<Flag>(NS_URI, "muji"); + + public HashMap<Jid, GroupCall> calls = new HashMap<Jid, GroupCall>(Jid.hash_bare_func, Jid.equals_bare_func); + + public override string get_ns() { return NS_URI; } + public override string get_id() { return IDENTITY.id; } + } +}
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