feat: Adds new module to unlimit jicofo and jvb connections.

In case limited those connection will be whitelisted and unlimited. Updates existing configurations to make sure prosody update will not break it by limiting too much.

Uses 28c16c93d7 version of the module: https://modules.prosody.im/mod_limits_exception.html
Will be available in prosody 0.12.

debian/jitsi-meet-prosody.postinst

 
         # Check whether prosody config has the internal muc, if not add it,
         # as we are migrating configs
-        if [ -f $PROSODY_HOST_CONFIG ] && ! grep -q "internal.auth.$JVB_HOSTNAME" $PROSODY_HOST_CONFIG; then
-            echo -e "\nComponent \"internal.auth.$JVB_HOSTNAME\" \"muc\"" >> $PROSODY_HOST_CONFIG
+        if [ -f $PROSODY_HOST_CONFIG ] && ! grep -q "internal.$JICOFO_AUTH_DOMAIN" $PROSODY_HOST_CONFIG; then
+            echo -e "\nComponent \"internal.$JICOFO_AUTH_DOMAIN\" \"muc\"" >> $PROSODY_HOST_CONFIG
             echo -e "    storage = \"memory\"" >> $PROSODY_HOST_CONFIG
             echo -e "    modules_enabled = { \"ping\"; }" >> $PROSODY_HOST_CONFIG
-            echo -e "    admins = { \"$JICOFO_AUTH_USER@auth.$JVB_HOSTNAME\", \"jvb@auth.$JVB_HOSTNAME\" }" >> $PROSODY_HOST_CONFIG
+            echo -e "    admins = { \"$JICOFO_AUTH_USER@$JICOFO_AUTH_DOMAIN\", \"jvb@$JICOFO_AUTH_DOMAIN\" }" >> $PROSODY_HOST_CONFIG
         fi
 
         # Convert the old focus component config to the new one.
         # Component "focus.jitmeet.example.com" "client_proxy"
         #    target_address = "focus@auth.jitmeet.example.com"
         if grep -q "Component \"focus.$JVB_HOSTNAME\"" $PROSODY_HOST_CONFIG && ! grep "Component \"focus.$JVB_HOSTNAME\" \"client_proxy\"" $PROSODY_HOST_CONFIG ;then
-            sed -i "s/Component \"focus.$JVB_HOSTNAME\"/Component \"focus.$JVB_HOSTNAME\" \"client_proxy\"\n    target_address = \"$JICOFO_AUTH_USER@auth.$JVB_HOSTNAME\"/g" $PROSODY_HOST_CONFIG
+            sed -i "s/Component \"focus.$JVB_HOSTNAME\"/Component \"focus.$JVB_HOSTNAME\" \"client_proxy\"\n    target_address = \"$JICOFO_AUTH_USER@$JICOFO_AUTH_DOMAIN\"/g" $PROSODY_HOST_CONFIG
             PROSODY_CONFIG_PRESENT="false"
         fi
 
         MAIN_MUC_PATTERN="Component \"conference.$JVB_HOSTNAME\" \"muc\""
         if ! grep -A 2 -- "${MAIN_MUC_PATTERN}" $PROSODY_HOST_CONFIG | grep -q "restrict_room_creation" ;then
             sed -i "s/${MAIN_MUC_PATTERN}/${MAIN_MUC_PATTERN}\n    restrict_room_creation = true/g" $PROSODY_HOST_CONFIG
+            PROSODY_CONFIG_PRESENT="false"
+        fi
+
+        if ! grep -q -- 'unlimited_jids' $PROSODY_HOST_CONFIG ;then
+            sed -i "1s/^/unlimited_jids = { \"$JICOFO_AUTH_USER@$JICOFO_AUTH_DOMAIN\", \"jvb@$JICOFO_AUTH_DOMAIN\" }\n/" $PROSODY_HOST_CONFIG
+            sed -i "s/VirtualHost \"$JICOFO_AUTH_DOMAIN\"/VirtualHost \"$JICOFO_AUTH_DOMAIN\"\n    modules_enabled = { \"limits_exception\"; }/g" $PROSODY_HOST_CONFIG
+            PROSODY_CONFIG_PRESENT="false"
         fi
 
         # Make sure the focus@auth user's roster includes the proxy component (this is idempotent)
-        prosodyctl mod_roster_command subscribe focus.$JVB_HOSTNAME $JICOFO_AUTH_USER@auth.$JVB_HOSTNAME
+        prosodyctl mod_roster_command subscribe focus.$JVB_HOSTNAME $JICOFO_AUTH_USER@$JICOFO_AUTH_DOMAIN
 
         if [ ! -f /var/lib/prosody/$JVB_HOSTNAME.crt ]; then
             # prosodyctl takes care for the permissions

doc/debian/jitsi-meet-prosody/prosody.cfg.lua-jvb.example

     ciphers = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384"
 }
 
+unlimited_jids = {
+    "focusUser@auth.jitmeet.example.com",
+    "jvb@auth.jitmeet.example.com"
+}
+
 VirtualHost "jitmeet.example.com"
     -- enabled = false -- Remove this line to enable this host
     authentication = "anonymous"
     muc_room_default_public_jids = true
 
 VirtualHost "auth.jitmeet.example.com"
+    modules_enabled = {
+        "limits_exception";
+    }
     authentication = "internal_hashed"
 
 -- Proxy to jicofo's user JID, so that it doesn't have to register as a component.

resources/prosody-plugins/mod_limits_exception.lua

+-- we use async to detect Prosody 0.10 and earlier
+local have_async = pcall(require, 'util.async');
+
+if not have_async then
+	return;
+end
+
+local unlimited_jids = module:get_option_inherited_set("unlimited_jids", {});
+
+if unlimited_jids:empty() then
+	return;
+end
+
+module:hook("authentication-success", function (event)
+	local session = event.session;
+	local jid = session.username .. "@" .. session.host;
+	if unlimited_jids:contains(jid) then
+		if session.conn and session.conn.setlimit then
+			session.conn:setlimit(0);
+		elseif session.throttle then
+			session.throttle = nil;
+		end
+	end
+end);