Add multiparty call support to libdino and xmpp-vala

14 files changed, 245 insertions, 36 deletions

diff --git a/xmpp-vala/CMakeLists.txt b/xmpp-vala/CMakeLists.txt
index bf8f0068..27f0d408 100644
--- a/xmpp-vala/CMakeLists.txt
+++ b/xmpp-vala/CMakeLists.txt
@@ -109,6 +109,8 @@ SOURCES
     "src/module/xep/0176_jingle_ice_udp/jingle_ice_udp_module.vala"
     "src/module/xep/0176_jingle_ice_udp/transport_parameters.vala"
 
+    "src/module/xep/0177_jingle_raw_udp.vala"
+
     "src/module/xep/0384_omemo/omemo_encryptor.vala"
     "src/module/xep/0384_omemo/omemo_decryptor.vala"
 
@@ -122,7 +124,9 @@ SOURCES
     "src/module/xep/0249_direct_muc_invitations.vala"
     "src/module/xep/0260_jingle_socks5_bytestreams.vala"
     "src/module/xep/0261_jingle_in_band_bytestreams.vala"
+    "src/module/xep/0272_muji.vala"
     "src/module/xep/0280_message_carbons.vala"
+    "src/module/xep/0298_coin.vala"
     "src/module/xep/0308_last_message_correction.vala"
     "src/module/xep/0313_message_archive_management.vala"
     "src/module/xep/0333_chat_markers.vala"
@@ -133,6 +137,7 @@ SOURCES
     "src/module/xep/0380_explicit_encryption.vala"
     "src/module/xep/0391_jingle_encrypted_transports.vala"
     "src/module/xep/0410_muc_self_ping.vala"
+    "src/module/xep/muji_meta.vala"
     "src/module/xep/pixbuf_storage.vala"
 
     "src/util.vala"
diff --git a/xmpp-vala/src/module/presence/flag.vala b/xmpp-vala/src/module/presence/flag.vala
index 77bc0b5f..8e13d0ad 100644
--- a/xmpp-vala/src/module/presence/flag.vala
+++ b/xmpp-vala/src/module/presence/flag.vala
@@ -20,6 +20,17 @@ public class Flag : XmppStreamFlag {
         return presences[full_jid];
     }
 
+    public Gee.List<Presence.Stanza> get_presences(Jid jid) {
+        Gee.List<Presence.Stanza> ret = new ArrayList<Presence.Stanza>();
+        Gee.List<Jid>? jid_res = resources[jid];
+        if (jid_res == null) return ret;
+
+        foreach (Jid full_jid in jid_res) {
+            ret.add(presences[full_jid]);
+        }
+        return ret;
+    }
+
     public void add_presence(Presence.Stanza presence) {
         if (!resources.has_key(presence.from)) {
             resources[presence.from] = new ArrayList<Jid>(Jid.equals_func);
diff --git a/xmpp-vala/src/module/xep/0045_muc/module.vala b/xmpp-vala/src/module/xep/0045_muc/module.vala
index 4cab9b6a..c9445f7e 100644
--- a/xmpp-vala/src/module/xep/0045_muc/module.vala
+++ b/xmpp-vala/src/module/xep/0045_muc/module.vala
@@ -58,6 +58,7 @@ public class JoinResult {
     public MucEnterError? muc_error;
     public string? stanza_error;
     public string? nick;
+    public bool newly_created = false;
 }
 
 public class Module : XmppStreamModule {
@@ -80,7 +81,7 @@ public class Module : XmppStreamModule {
         received_pipeline_listener = new ReceivedPipelineListener(this);
     }
 
-    public async JoinResult? enter(XmppStream stream, Jid bare_jid, string nick, string? password, DateTime? history_since) {
+    public async JoinResult? enter(XmppStream stream, Jid bare_jid, string nick, string? password, DateTime? history_since, StanzaNode? additional_node) {
         try {
             Presence.Stanza presence = new Presence.Stanza();
             presence.to = bare_jid.with_resource(nick);
@@ -96,6 +97,10 @@ public class Module : XmppStreamModule {
             }
             presence.stanza.put_node(x_node);
 
+            if (additional_node != null) {
+                presence.stanza.put_node(additional_node);
+            }
+
             stream.get_flag(Flag.IDENTITY).start_muc_enter(bare_jid, presence.id);
 
             query_room_info.begin(stream, bare_jid);
@@ -210,11 +215,15 @@ public class Module : XmppStreamModule {
         stream.get_module(Iq.Module.IDENTITY).send_iq(stream, iq);
     }
 
-    public void change_affiliation(XmppStream stream, Jid jid, string nick, string new_affiliation) {
-        StanzaNode query = new StanzaNode.build("query", NS_URI_ADMIN).add_self_xmlns();
-        query.put_node(new StanzaNode.build("item", NS_URI_ADMIN).put_attribute("nick", nick, NS_URI_ADMIN).put_attribute("affiliation", new_affiliation, NS_URI_ADMIN));
-        Iq.Stanza iq = new Iq.Stanza.set(query) { to=jid };
-        stream.get_module(Iq.Module.IDENTITY).send_iq(stream, iq);
+    public async void change_affiliation(XmppStream stream, Jid muc_jid, Jid? user_jid, string? nick, string new_affiliation) {
+        StanzaNode item_node = new StanzaNode.build("item", NS_URI_ADMIN)
+                .put_attribute("affiliation", new_affiliation, NS_URI_ADMIN);
+        if (user_jid != null) item_node.put_attribute("jid", user_jid.to_string(), NS_URI_ADMIN);
+        if (nick != null) item_node.put_attribute("nick", nick, NS_URI_ADMIN);
+
+        StanzaNode query = new StanzaNode.build("query", NS_URI_ADMIN).add_self_xmlns().put_node(item_node);
+        Iq.Stanza iq = new Iq.Stanza.set(query) { to=muc_jid };
+        yield stream.get_module(Iq.Module.IDENTITY).send_iq_async(stream, iq);
     }
 
     public async DataForms.DataForm? get_config_form(XmppStream stream, Jid jid) {
@@ -229,19 +238,19 @@ public class Module : XmppStreamModule {
         return null;
     }
 
-    public void set_config_form(XmppStream stream, Jid jid, DataForms.DataForm data_form) {
+    public async void set_config_form(XmppStream stream, Jid jid, DataForms.DataForm data_form) {
         StanzaNode stanza_node = new StanzaNode.build("query", NS_URI_OWNER);
         stanza_node.add_self_xmlns().put_node(data_form.get_submit_node());
         Iq.Stanza set_iq = new Iq.Stanza.set(stanza_node) { to=jid };
-        stream.get_module(Iq.Module.IDENTITY).send_iq(stream, set_iq);
+        yield stream.get_module(Iq.Module.IDENTITY).send_iq_async(stream, set_iq);
     }
 
     public override void attach(XmppStream stream) {
         stream.add_flag(new Flag());
         stream.get_module(MessageModule.IDENTITY).received_message.connect(on_received_message);
         stream.get_module(MessageModule.IDENTITY).received_pipeline.connect(received_pipeline_listener);
-        stream.get_module(Presence.Module.IDENTITY).received_presence.connect(check_for_enter_error);
         stream.get_module(Presence.Module.IDENTITY).received_available.connect(on_received_available);
+        stream.get_module(Presence.Module.IDENTITY).received_presence.connect(check_for_enter_error);
         stream.get_module(Presence.Module.IDENTITY).received_unavailable.connect(on_received_unavailable);
         stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI);
     }
@@ -249,8 +258,8 @@ public class Module : XmppStreamModule {
     public override void detach(XmppStream stream) {
         stream.get_module(MessageModule.IDENTITY).received_message.disconnect(on_received_message);
         stream.get_module(MessageModule.IDENTITY).received_pipeline.disconnect(received_pipeline_listener);
-        stream.get_module(Presence.Module.IDENTITY).received_presence.disconnect(check_for_enter_error);
         stream.get_module(Presence.Module.IDENTITY).received_available.disconnect(on_received_available);
+        stream.get_module(Presence.Module.IDENTITY).received_presence.disconnect(check_for_enter_error);
         stream.get_module(Presence.Module.IDENTITY).received_unavailable.disconnect(on_received_unavailable);
         stream.get_module(ServiceDiscovery.Module.IDENTITY).remove_feature(stream, NS_URI);
     }
@@ -339,7 +348,8 @@ public class Module : XmppStreamModule {
                         query_affiliation.begin(stream, bare_jid, "owner");
 
                         flag.finish_muc_enter(bare_jid);
-                        flag.enter_futures[bare_jid].set_value(new JoinResult() {nick=presence.from.resourcepart});
+                        var join_result = new JoinResult() { nick=presence.from.resourcepart, newly_created=status_codes.contains(StatusCode.NEW_ROOM_CREATED) };
+                        flag.enter_futures[bare_jid].set_value(join_result);
                     }
 
                     flag.set_muc_nick(presence.from);
diff --git a/xmpp-vala/src/module/xep/0166_jingle/component.vala b/xmpp-vala/src/module/xep/0166_jingle/component.vala
index 5d573522..e30175d5 100644
--- a/xmpp-vala/src/module/xep/0166_jingle/component.vala
+++ b/xmpp-vala/src/module/xep/0166_jingle/component.vala
@@ -2,6 +2,8 @@ namespace Xmpp.Xep.Jingle {
 
     public abstract class ComponentConnection : Object {
         public uint8 component_id { get; set; default = 0; }
+        public ulong bytes_sent { get; protected set; default=0; }
+        public ulong bytes_received { get; protected set; default=0; }
         public abstract async void terminate(bool we_terminated, string? reason_name = null, string? reason_text = null);
         public signal void connection_closed();
         public signal void connection_error(IOError e);
diff --git a/xmpp-vala/src/module/xep/0166_jingle/content.vala b/xmpp-vala/src/module/xep/0166_jingle/content.vala
index b51bb26d..31d8f9fc 100644
--- a/xmpp-vala/src/module/xep/0166_jingle/content.vala
+++ b/xmpp-vala/src/module/xep/0166_jingle/content.vala
@@ -95,16 +95,27 @@ public class Xmpp.Xep.Jingle.Content : Object {
     }
 
     public void accept() {
+        if (state != State.PENDING) {
+            warning("accepting a non-pending content");
+            return;
+        }
         state = State.WANTS_TO_BE_ACCEPTED;
-
         session.accept_content(this);
     }
 
     public void reject() {
+        if (state != State.PENDING) {
+            warning("rejecting a non-pending content");
+            return;
+        }
         session.reject_content(this);
     }
 
     public void terminate(bool we_terminated, string? reason_name, string? reason_text) {
+        if (state == State.PENDING) {
+            warning("terminating a pending call");
+            return;
+        }
         content_params.terminate(we_terminated, reason_name, reason_text);
         transport_params.dispose();
 
@@ -137,7 +148,7 @@ public class Xmpp.Xep.Jingle.Content : Object {
         this.content_params.handle_accept(stream, this.session, this, content_node.description);
     }
 
-    private async void select_new_transport() {
+    public async void select_new_transport() {
         XmppStream stream = session.stream;
         Transport? new_transport = yield stream.get_module(Module.IDENTITY).select_transport(stream, transport.type_, transport_params.components, peer_full_jid, tried_transport_methods);
         if (new_transport == null) {
diff --git a/xmpp-vala/src/module/xep/0166_jingle/session.vala b/xmpp-vala/src/module/xep/0166_jingle/session.vala
index a45fc6db..af913aab 100644
--- a/xmpp-vala/src/module/xep/0166_jingle/session.vala
+++ b/xmpp-vala/src/module/xep/0166_jingle/session.vala
@@ -264,10 +264,7 @@ public class Xmpp.Xep.Jingle.Session : Object {
                 warning("Received invalid session accept: %s", e.message);
             }
         }
-        // TODO(hrxi): more sanity checking, perhaps replace who we're talking to
-        if (!responder.is_full()) {
-            throw new IqError.BAD_REQUEST("invalid responder JID");
-        }
+
         foreach (ContentNode content_node in content_nodes) {
             handle_content_accept(content_node);
         }
diff --git a/xmpp-vala/src/module/xep/0167_jingle_rtp/content_parameters.vala b/xmpp-vala/src/module/xep/0167_jingle_rtp/content_parameters.vala
index eadc1c8b..9022547d 100644
--- a/xmpp-vala/src/module/xep/0167_jingle_rtp/content_parameters.vala
+++ b/xmpp-vala/src/module/xep/0167_jingle_rtp/content_parameters.vala
@@ -21,6 +21,10 @@ public class Xmpp.Xep.JingleRtp.Parameters : Jingle.ContentParameters, Object {
     public Gee.List<Crypto> remote_cryptos = new ArrayList<Crypto>();
     public Crypto? local_crypto = null;
     public Crypto? remote_crypto = null;
+    public Jid? muji_muc = null;
+
+    public bool rtp_ready { get; private set; default=false; }
+    public bool rtcp_ready { get; private set; default=false; }
 
     public weak Stream? stream { get; private set; }
 
@@ -28,6 +32,7 @@ public class Xmpp.Xep.JingleRtp.Parameters : Jingle.ContentParameters, Object {
 
     public Parameters(Module parent,
                       string media, Gee.List<PayloadType> payload_types,
+                      Jid? muji_muc,
                       string? ssrc = null, bool rtcp_mux = false,
                       string? bandwidth = null, string? bandwidth_type = null,
                       bool encryption_required = false, Crypto? local_crypto = null
@@ -41,6 +46,7 @@ public class Xmpp.Xep.JingleRtp.Parameters : Jingle.ContentParameters, Object {
         this.encryption_required = encryption_required;
         this.payload_types = payload_types;
         this.local_crypto = local_crypto;
+        this.muji_muc = muji_muc;
     }
 
     public Parameters.from_node(Module parent, StanzaNode node) throws Jingle.IqError {
@@ -61,6 +67,10 @@ public class Xmpp.Xep.JingleRtp.Parameters : Jingle.ContentParameters, Object {
         foreach (StanzaNode subnode in node.get_subnodes(HeaderExtension.NAME, HeaderExtension.NS_URI)) {
             this.header_extensions.add(HeaderExtension.parse(subnode));
         }
+        string? muji_muc_str = node.get_deep_attribute(Xep.Muji.NS_URI + ":muji", "muc");
+        if (muji_muc_str != null) {
+            muji_muc = new Jid(muji_muc_str);
+        }
     }
 
     public async void handle_proposed_content(XmppStream stream, Jingle.Session session, Jingle.Content content) {
@@ -95,6 +105,7 @@ public class Xmpp.Xep.JingleRtp.Parameters : Jingle.ContentParameters, Object {
         ulong rtcp_ready_handler_id = 0;
         rtcp_ready_handler_id = rtcp_datagram.notify["ready"].connect((rtcp_datagram, _) => {
             this.stream.on_rtcp_ready();
+            this.rtcp_ready = true;
 
             ((Jingle.DatagramConnection)rtcp_datagram).disconnect(rtcp_ready_handler_id);
             rtcp_ready_handler_id = 0;
@@ -103,8 +114,10 @@ public class Xmpp.Xep.JingleRtp.Parameters : Jingle.ContentParameters, Object {
         ulong rtp_ready_handler_id = 0;
         rtp_ready_handler_id = rtp_datagram.notify["ready"].connect((rtp_datagram, _) => {
             this.stream.on_rtp_ready();
+            this.rtp_ready = true;
             if (rtcp_mux) {
                 this.stream.on_rtcp_ready();
+                this.rtcp_ready = true;
             }
             connection_ready();
 
@@ -202,6 +215,9 @@ public class Xmpp.Xep.JingleRtp.Parameters : Jingle.ContentParameters, Object {
         if (rtcp_mux) {
             ret.put_node(new StanzaNode.build("rtcp-mux", NS_URI));
         }
+        if (muji_muc != null) {
+            ret.put_node(new StanzaNode.build("muji", Xep.Muji.NS_URI).add_self_xmlns().put_attribute("muc", muji_muc.to_string()));
+        }
         return ret;
     }
 }
diff --git a/xmpp-vala/src/module/xep/0167_jingle_rtp/jingle_rtp_module.vala b/xmpp-vala/src/module/xep/0167_jingle_rtp/jingle_rtp_module.vala
index 6b55cbe6..9dab5dc2 100644
--- a/xmpp-vala/src/module/xep/0167_jingle_rtp/jingle_rtp_module.vala
+++ b/xmpp-vala/src/module/xep/0167_jingle_rtp/jingle_rtp_module.vala
@@ -19,6 +19,7 @@ public abstract class Module : XmppStreamModule {
     }
 
     public abstract async Gee.List<PayloadType> get_supported_payloads(string media);
+    public abstract async bool is_payload_supported(string media, JingleRtp.PayloadType payload_type);
     public abstract async PayloadType? pick_payload_type(string media, Gee.List<PayloadType> payloads);
     public abstract Crypto? generate_local_crypto();
     public abstract Crypto? pick_remote_crypto(Gee.List<Crypto> cryptos);
@@ -28,7 +29,7 @@ public abstract class Module : XmppStreamModule {
     public abstract Gee.List<HeaderExtension> get_suggested_header_extensions(string media);
     public abstract void close_stream(Stream stream);
 
-    public async Jingle.Session start_call(XmppStream stream, Jid receiver_full_jid, bool video, string? sid = null) throws Jingle.Error {
+    public async Jingle.Session start_call(XmppStream stream, Jid receiver_full_jid, bool video, string sid, Jid? muji_muc) throws Jingle.Error {
 
         Jingle.Module jingle_module = stream.get_module(Jingle.Module.IDENTITY);
 
@@ -40,7 +41,7 @@ public abstract class Module : XmppStreamModule {
         ArrayList<Jingle.Content> contents = new ArrayList<Jingle.Content>();
 
         // Create audio content
-        Parameters audio_content_parameters = new Parameters(this, "audio", yield get_supported_payloads("audio"));
+        Parameters audio_content_parameters = new Parameters(this, "audio", yield get_supported_payloads("audio"), muji_muc);
         audio_content_parameters.local_crypto = generate_local_crypto();
         audio_content_parameters.header_extensions.add_all(get_suggested_header_extensions("audio"));
         Jingle.Transport? audio_transport = yield jingle_module.select_transport(stream, content_type.required_transport_type, content_type.required_components, receiver_full_jid, Set.empty());
@@ -48,7 +49,7 @@ public abstract class Module : XmppStreamModule {
             throw new Jingle.Error.NO_SHARED_PROTOCOLS("No suitable audio transports");
         }
         Jingle.TransportParameters audio_transport_params = audio_transport.create_transport_parameters(stream, content_type.required_components, my_jid, receiver_full_jid);
-        Jingle.Content audio_content = new Jingle.Content.initiate_sent("voice", Jingle.Senders.BOTH,
+        Jingle.Content audio_content = new Jingle.Content.initiate_sent("audio", Jingle.Senders.BOTH,
                 content_type, audio_content_parameters,
                 audio_transport, audio_transport_params,
                 null, null,
@@ -58,7 +59,7 @@ public abstract class Module : XmppStreamModule {
         Jingle.Content? video_content = null;
         if (video) {
             // Create video content
-            Parameters video_content_parameters = new Parameters(this, "video", yield get_supported_payloads("video"));
+            Parameters video_content_parameters = new Parameters(this, "video", yield get_supported_payloads("video"), muji_muc);
             video_content_parameters.local_crypto = generate_local_crypto();
             video_content_parameters.header_extensions.add_all(get_suggested_header_extensions("video"));
             Jingle.Transport? video_transport = yield stream.get_module(Jingle.Module.IDENTITY).select_transport(stream, content_type.required_transport_type, content_type.required_components, receiver_full_jid, Set.empty());
@@ -66,7 +67,7 @@ public abstract class Module : XmppStreamModule {
                 throw new Jingle.Error.NO_SHARED_PROTOCOLS("No suitable video transports");
             }
             Jingle.TransportParameters video_transport_params = video_transport.create_transport_parameters(stream, content_type.required_components, my_jid, receiver_full_jid);
-            video_content = new Jingle.Content.initiate_sent("webcam", Jingle.Senders.BOTH,
+            video_content = new Jingle.Content.initiate_sent("video", Jingle.Senders.BOTH,
                     content_type, video_content_parameters,
                     video_transport, video_transport_params,
                     null, null,
@@ -83,7 +84,7 @@ public abstract class Module : XmppStreamModule {
         }
     }
 
-    public async Jingle.Content add_outgoing_video_content(XmppStream stream, Jingle.Session session) throws Jingle.Error {
+    public async Jingle.Content add_outgoing_video_content(XmppStream stream, Jingle.Session session, Jid? muji_muc) throws Jingle.Error {
         Jid my_jid = session.local_full_jid;
         Jid receiver_full_jid = session.peer_full_jid;
 
@@ -100,7 +101,7 @@ public abstract class Module : XmppStreamModule {
 
         if (content == null) {
             // Content for video does not yet exist -> create it
-            Parameters video_content_parameters = new Parameters(this, "video", yield get_supported_payloads("video"));
+            Parameters video_content_parameters = new Parameters(this, "video", yield get_supported_payloads("video"), muji_muc);
             video_content_parameters.local_crypto = generate_local_crypto();
             video_content_parameters.header_extensions.add_all(get_suggested_header_extensions("video"));
             Jingle.Transport? video_transport = yield stream.get_module(Jingle.Module.IDENTITY).select_transport(stream, content_type.required_transport_type, content_type.required_components, receiver_full_jid, Set.empty());
@@ -108,7 +109,7 @@ public abstract class Module : XmppStreamModule {
                 throw new Jingle.Error.NO_SHARED_PROTOCOLS("No suitable video transports");
             }
             Jingle.TransportParameters video_transport_params = video_transport.create_transport_parameters(stream, content_type.required_components, my_jid, receiver_full_jid);
-            content = new Jingle.Content.initiate_sent("webcam",
+            content = new Jingle.Content.initiate_sent("video",
                     session.we_initiated ? Jingle.Senders.INITIATOR : Jingle.Senders.RESPONDER,
                     content_type, video_content_parameters,
                     video_transport, video_transport_params,
diff --git a/xmpp-vala/src/module/xep/0167_jingle_rtp/payload_type.vala b/xmpp-vala/src/module/xep/0167_jingle_rtp/payload_type.vala
index faba38c9..73bc9800 100644
--- a/xmpp-vala/src/module/xep/0167_jingle_rtp/payload_type.vala
+++ b/xmpp-vala/src/module/xep/0167_jingle_rtp/payload_type.vala
@@ -64,12 +64,27 @@ public class Xmpp.Xep.JingleRtp.PayloadType {
     }
 
     public static bool equals_func(PayloadType a, PayloadType b) {
-        return a.id == b.id &&
+        bool simple = a.id == b.id &&
                 a.name == b.name &&
                 a.channels == b.channels &&
                 a.clockrate == b.clockrate &&
                 a.maxptime == b.maxptime &&
-                a.ptime == b.ptime;
+                a.ptime == b.ptime &&
+                a.parameters.size == b.parameters.size &&
+                a.rtcp_fbs.size == b.rtcp_fbs.size;
+        if (!simple) return false;
+        foreach (string key in a.parameters.keys) {
+            if (!b.parameters.has_key(key)) return false;
+            if (a.parameters[key] != b.parameters[key]) return false;
+        }
+        foreach (RtcpFeedback fb in a.rtcp_fbs) {
+            if (!b.rtcp_fbs.any_match((it) => it.type_ == fb.type_ && it.subtype == fb.subtype)) return false;
+        }
+        return true;
+    }
+
+    public static uint hash_func(PayloadType payload_type) {
+        return payload_type.to_xml().to_string().hash();
     }
 }
 
diff --git a/xmpp-vala/src/module/xep/0176_jingle_ice_udp/transport_parameters.vala b/xmpp-vala/src/module/xep/0176_jingle_ice_udp/transport_parameters.vala
index 07b599ee..680d7c80 100644
--- a/xmpp-vala/src/module/xep/0176_jingle_ice_udp/transport_parameters.vala
+++ b/xmpp-vala/src/module/xep/0176_jingle_ice_udp/transport_parameters.vala
@@ -28,6 +28,7 @@ public abstract class Xmpp.Xep.JingleIceUdp.IceUdpTransportParameters : Jingle.T
     private bool connection_created = false;
 
     protected weak Jingle.Content? content = null;
+    protected bool use_raw = false;
 
     protected IceUdpTransportParameters(uint8 components, Jid local_full_jid, Jid peer_full_jid, StanzaNode? node = null) {
         this.components_ = components;
@@ -80,10 +81,16 @@ public abstract class Xmpp.Xep.JingleIceUdp.IceUdpTransportParameters : Jingle.T
             node.put_node(fingerprint_node);
         }
 
-        foreach (Candidate candidate in unsent_local_candidates) {
+        if (action_type != "transport-info") {
+            foreach (Candidate candidate in unsent_local_candidates) {
+                node.put_node(candidate.to_xml());
+            }
+            unsent_local_candidates.clear();
+        } else if (!unsent_local_candidates.is_empty) {
+            Candidate candidate = unsent_local_candidates.first();
             node.put_node(candidate.to_xml());
+            unsent_local_candidates.remove(candidate);
         }
-        unsent_local_candidates.clear();
         return node;
     }
 
@@ -128,15 +135,15 @@ public abstract class Xmpp.Xep.JingleIceUdp.IceUdpTransportParameters : Jingle.T
         local_candidates.add(candidate);
 
         if (this.content != null && (this.connection_created || !this.incoming)) {
-            Timeout.add(50, () => {
+            Idle.add( () => {
                 check_send_transport_info();
-                return false;
+                return Source.REMOVE;
             });
         }
     }
 
     private void check_send_transport_info() {
-        if (this.content != null && unsent_local_candidates.size > 0) {
+        if (this.content != null && !unsent_local_candidates.is_empty) {
             content.send_transport_info(to_transport_stanza_node("transport-info"));
         }
     }
diff --git a/xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala b/xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala
index 7b213ca5..f85049ac 100644
--- a/xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala
+++ b/xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala
@@ -100,7 +100,11 @@ public class Module : Jingle.ContentType, XmppStreamModule {
             yield;
 
             // Send the file data
-            Jingle.StreamingConnection connection = content.component_connections.values.to_array()[0] as Jingle.StreamingConnection;
+            Jingle.StreamingConnection connection = content.component_connections[1] as Jingle.StreamingConnection;
+            if (connection == null || connection.stream == null) {
+                warning("Connection or stream not null");
+                return;
+            }
             IOStream io_stream = yield connection.stream.wait_async();
             yield io_stream.input_stream.close_async();
             yield io_stream.output_stream.splice_async(input_stream, OutputStreamSpliceFlags.CLOSE_SOURCE|OutputStreamSpliceFlags.CLOSE_TARGET);
diff --git a/xmpp-vala/src/module/xep/0260_jingle_socks5_bytestreams.vala b/xmpp-vala/src/module/xep/0260_jingle_socks5_bytestreams.vala
index 32ba8bb9..0fe9ce5f 100644
--- a/xmpp-vala/src/module/xep/0260_jingle_socks5_bytestreams.vala
+++ b/xmpp-vala/src/module/xep/0260_jingle_socks5_bytestreams.vala
@@ -759,6 +759,10 @@ class Parameters : Jingle.TransportParameters, Object {
     }
 
     private void content_set_transport_connection_error(Error e) {
+        Jingle.Content? strong_content = content;
+        if (strong_content == null) return;
+
+        strong_content.select_new_transport.begin();
         connection.set_error(e);
     }
 
diff --git a/xmpp-vala/src/module/xep/0384_omemo/omemo_decryptor.vala b/xmpp-vala/src/module/xep/0384_omemo/omemo_decryptor.vala
index 8e3213ae..a8ca5016 100644
--- a/xmpp-vala/src/module/xep/0384_omemo/omemo_decryptor.vala
+++ b/xmpp-vala/src/module/xep/0384_omemo/omemo_decryptor.vala
@@ -18,16 +18,25 @@ namespace Xmpp.Xep.Omemo {
             ParsedData ret = new ParsedData();
 
             StanzaNode? header_node = encrypted_node.get_subnode("header");
-            if (header_node == null) return null;
+            if (header_node == null) {
+                warning("Can't parse OMEMO node: No header node");
+                return null;
+            }
 
             ret.sid = header_node.get_attribute_int("sid", -1);
-            if (ret.sid == -1) return null;
+            if (ret.sid == -1) {
+                warning("Can't parse OMEMO node: No sid");
+                return null;
+            }
 
             string? payload_str = encrypted_node.get_deep_string_content("payload");
             if (payload_str != null) ret.ciphertext = Base64.decode(payload_str);
 
             string? iv_str = header_node.get_deep_string_content("iv");
-            if (iv_str == null) return null;
+            if (iv_str == null) {
+                warning("Can't parse OMEMO node: No iv");
+                return null;
+            }
             ret.iv = Base64.decode(iv_str);
 
             foreach (StanzaNode key_node in header_node.get_subnodes("key")) {
diff --git a/xmpp-vala/src/module/xep/muji_meta.vala b/xmpp-vala/src/module/xep/muji_meta.vala
new file mode 100644
index 00000000..4452e611
--- /dev/null
+++ b/xmpp-vala/src/module/xep/muji_meta.vala
@@ -0,0 +1,117 @@
+using Gee;
+namespace Xmpp.Xep.MujiMeta {
+
+    public const string NS_URI = "http://telepathy.freedesktop.org/muji";
+
+    public class Module : XmppStreamModule {
+        public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "muji_meta");
+
+        public signal void call_proposed(Jid from, Jid to, Jid muc_jid, Gee.List<StanzaNode> descriptions);
+        public signal void call_retracted(Jid from, Jid to, Jid muc_jid);
+        public signal void call_accepted(Jid from, Jid muc_jid);
+        public signal void call_rejected(Jid from, Jid to, Jid muc_jid);
+
+        public void send_invite(XmppStream stream, Jid invitee, Jid muc_jid, bool video) {
+            var invite_node = new StanzaNode.build("propose", NS_URI).put_attribute("muc", muc_jid.to_string());
+            invite_node.put_node(new StanzaNode.build("description", Xep.JingleRtp.NS_URI).add_self_xmlns().put_attribute("media", "audio"));
+            if (video) {
+                invite_node.put_node(new StanzaNode.build("description", Xep.JingleRtp.NS_URI).add_self_xmlns().put_attribute("media", "video"));
+            }
+            var muji_node = new StanzaNode.build("muji", NS_URI).add_self_xmlns().put_node(invite_node);
+            MessageStanza invite_message = new MessageStanza() { to=invitee, type_=MessageStanza.TYPE_CHAT };
+            invite_message.stanza.put_node(muji_node);
+            stream.get_module(MessageModule.IDENTITY).send_message.begin(stream, invite_message);
+        }
+
+        public void send_invite_retract_to_peer(XmppStream stream, Jid invitee, Jid muc_jid) {
+            send_jmi_message(stream, "retract", invitee, muc_jid);
+        }
+
+        public void send_invite_accept_to_peer(XmppStream stream, Jid invitor, Jid muc_jid) {
+            send_jmi_message(stream, "accept", invitor, muc_jid);
+        }
+
+        public void send_invite_accept_to_self(XmppStream stream, Jid muc_jid) {
+            send_jmi_message(stream, "accept", Bind.Flag.get_my_jid(stream).bare_jid, muc_jid);
+        }
+
+        public void send_invite_reject_to_peer(XmppStream stream, Jid invitor, Jid muc_jid) {
+            send_jmi_message(stream, "reject", invitor, muc_jid);
+        }
+
+        public void send_invite_reject_to_self(XmppStream stream, Jid muc_jid) {
+            send_jmi_message(stream, "reject", Bind.Flag.get_my_jid(stream).bare_jid, muc_jid);
+        }
+
+        private void send_jmi_message(XmppStream stream, string name, Jid to, Jid muc) {
+            var jmi_node = new StanzaNode.build(name, NS_URI).add_self_xmlns().put_attribute("muc", muc.to_string());
+            var muji_node = new StanzaNode.build("muji", NS_URI).add_self_xmlns().put_node(jmi_node);
+
+            MessageStanza accepted_message = new MessageStanza() { to=to, type_=MessageStanza.TYPE_CHAT };
+            accepted_message.stanza.put_node(muji_node);
+            stream.get_module(MessageModule.IDENTITY).send_message.begin(stream, accepted_message);
+        }
+
+        private void on_received_message(XmppStream stream, MessageStanza message) {
+            Xep.MessageArchiveManagement.MessageFlag? mam_flag = Xep.MessageArchiveManagement.MessageFlag.get_flag(message);
+            if (mam_flag != null) return;
+
+            var muji_node = message.stanza.get_subnode("muji", NS_URI);
+            if (muji_node == null) return;
+
+            StanzaNode? mi_node = null;
+            foreach (StanzaNode node in muji_node.sub_nodes) {
+                if (node.ns_uri == NS_URI) {
+                    mi_node = node;
+                }
+            }
+            if (mi_node == null) return;
+
+            string? jid_str = mi_node.get_attribute("muc");
+            if (jid_str == null) return;
+
+            Jid muc_jid = null;
+            try {
+                muc_jid = new Jid(jid_str);
+            } catch (Error e) {
+                return;
+            }
+
+            switch (mi_node.name) {
+                case "accept":
+                case "proceed":
+                    call_accepted(message.from, muc_jid);
+                    break;
+                case "propose":
+                    ArrayList<StanzaNode> descriptions = new ArrayList<StanzaNode>();
+
+                    foreach (StanzaNode node in mi_node.sub_nodes) {
+                        if (node.name != "description") continue;
+                        descriptions.add(node);
+                    }
+
+                    if (descriptions.size > 0) {
+                        call_proposed(message.from, message.to, muc_jid, descriptions);
+                    }
+                    break;
+                case "retract":
+                    call_retracted(message.from, message.to, muc_jid);
+                    break;
+                case "reject":
+                    call_rejected(message.from, message.to, muc_jid);
+                    break;
+            }
+        }
+
+        public override void attach(XmppStream stream) {
+            stream.get_module(MessageModule.IDENTITY).received_message.connect(on_received_message);
+        }
+
+        public override void detach(XmppStream stream) {
+            stream.get_module(MessageModule.IDENTITY).received_message.disconnect(on_received_message);
+        }
+
+        public override string get_ns() { return NS_URI; }
+        public override string get_id() { return IDENTITY.id; }
+    }
+}
\ No newline at end of file