Respond to disco#info on MUC JIDs

Otherwise, some client won’t do MAM, since they don’t know biboumi supports
it.

src/xmpp/biboumi_component.cpp

@@ -422,7 +422,13 @@ void BiboumiComponent::handle_iq(const Stanza& stanza)
             }
           else if (iid.type == Iid::Type::Channel)
             {
-              if (node == MUC_TRAFFIC_NS)
+              log_debug("type_channel");
+              if (node.empty())
+                {
+                  this->send_irc_channel_disco_info(id, from, to_str);
+                  stanza_error.disable();
+                }
+              else if (node == MUC_TRAFFIC_NS)
                 {
                   this->send_irc_channel_muc_traffic_info(id, from, to_str);
                   stanza_error.disable();
@@ -755,6 +761,32 @@ void BiboumiComponent::send_irc_channel_muc_traffic_info(const std::string& id,
   this->send_stanza(iq);
 }
 
+void BiboumiComponent::send_irc_channel_disco_info(const std::string& id, const std::string& jid_to, const std::string& jid_from)
+{
+  log_debug("jid_from: ", jid_from);
+  Jid from(jid_from);
+  Iid iid(from.local, {});
+  Stanza iq("iq");
+  {
+    iq["type"] = "result";
+    iq["id"] = id;
+    iq["to"] = jid_to;
+    iq["from"] = jid_from;
+    XmlSubNode query(iq, "query");
+    query["xmlns"] = DISCO_INFO_NS;
+    XmlSubNode identity(query, "identity");
+    identity["category"] = "conference";
+    identity["type"] = "irc";
+    identity["name"] = "IRC channel "s + iid.get_local() + " from server " + iid.get_server() + " over biboumi";
+    for (const char *ns: {DISCO_INFO_NS, MUC_NS, ADHOC_NS, PING_NS, MAM_NS, VERSION_NS})
+      {
+        XmlSubNode feature(query, "feature");
+        feature["var"] = ns;
+      }
+  }
+  this->send_stanza(iq);
+}
+
 void BiboumiComponent::send_ping_request(const std::string& from,
                                          const std::string& jid_to,
                                          const std::string& id)

src/xmpp/biboumi_component.hpp

@@ -70,6 +70,7 @@ public:
    * http://xmpp.org/extensions/xep-0045.html#impl-service-traffic
    */
    void send_irc_channel_muc_traffic_info(const std::string& id, const std::string& jid_to, const std::string& jid_from);
+   void send_irc_channel_disco_info(const std::string& id, const std::string& jid_to, const std::string& jid_from);
   /**
    * Send a ping request
    */

tests/end_to_end/__main__.py

@@ -1866,6 +1866,38 @@ if __name__ == '__main__':
                              "<iq from='{jid_one}/{resource_one}' to='#foo%{irc_server_one}' id='1' type='get'><query xmlns='http://jabber.org/protocol/disco#info' node='http://jabber.org/protocol/muc#traffic'/></iq>"),
                      partial(expect_stanza, "/iq[@from='#foo%{irc_server_one}'][@to='{jid_one}/{resource_one}'][@type='result']/disco_info:query[@node='http://jabber.org/protocol/muc#traffic']"),
                 ]),
+                Scenario("muc_disco_info",
+                [
+                     handshake_sequence(),
+
+                     partial(send_stanza,
+                             "<iq from='{jid_one}/{resource_one}' to='#foo%{irc_server_one}' id='1' type='get'><query xmlns='http://jabber.org/protocol/disco#info'/></iq>"),
+                     partial(expect_stanza,
+                             ("/iq[@from='#foo%{irc_server_one}'][@to='{jid_one}/{resource_one}'][@type='result']/disco_info:query",
+                              "/iq[@type='result']/disco_info:query/disco_info:identity[@category='conference'][@type='irc'][@name='IRC channel #foo from server {irc_host_one} over biboumi']",
+                              "/iq/disco_info:query/disco_info:feature[@var='jabber:iq:version']",
+                              "/iq/disco_info:query/disco_info:feature[@var='http://jabber.org/protocol/commands']",
+                              "/iq/disco_info:query/disco_info:feature[@var='urn:xmpp:ping']",
+                              "/iq/disco_info:query/disco_info:feature[@var='urn:xmpp:mam:2']",
+                              "/iq/disco_info:query/disco_info:feature[@var='jabber:iq:version']",
+                             )),
+                ]),
+                Scenario("fixed_muc_disco_info",
+                [
+                     handshake_sequence(),
+
+                     partial(send_stanza,
+                             "<iq from='{jid_one}/{resource_one}' to='#foo@{biboumi_host}' id='1' type='get'><query xmlns='http://jabber.org/protocol/disco#info'/></iq>"),
+                     partial(expect_stanza,
+                             ("/iq[@from='#foo@{biboumi_host}'][@to='{jid_one}/{resource_one}'][@type='result']/disco_info:query",
+                              "/iq[@type='result']/disco_info:query/disco_info:identity[@category='conference'][@type='irc'][@name='IRC channel #foo from server {irc_host_one} over biboumi']",
+                              "/iq/disco_info:query/disco_info:feature[@var='jabber:iq:version']",
+                              "/iq/disco_info:query/disco_info:feature[@var='http://jabber.org/protocol/commands']",
+                              "/iq/disco_info:query/disco_info:feature[@var='urn:xmpp:ping']",
+                              "/iq/disco_info:query/disco_info:feature[@var='urn:xmpp:mam:2']",
+                              "/iq/disco_info:query/disco_info:feature[@var='jabber:iq:version']",
+                              )),
+                ], conf='fixed_server'),
                 Scenario("raw_message",
                 [
                      handshake_sequence(),