File

mod_compliance_2023: Add 2023 Version of the compliance module, basis is the 2021 Version. diff --git a/mod_compliance_2023/README.md b/mod_compliance_2023/README.md new file mode 100644 --- /dev/null +++ b/mod_compliance_2023/README.md @@ -0,0 +1,22 @@ +--- +summary: XMPP Compliance Suites 2023 self-test +labels: +- Stage-Beta +rockspec: + dependencies: + - mod_cloud_notify + +... + +Compare the list of enabled modules with +[XEP-0479: XMPP Compliance Suites 2023] and produce basic report to the +Prosody log file. + +If installed with the Prosody plugin installer then all modules needed for a green checkmark should be included. (With prosody 0.12 only [mod_cloud_notify] is not included with prosody and we need the community module) + +# Compatibility + + Prosody-Version Status + --------------- ---------------------- + trunk Works as of 2024-12-21 + 0.12 Works diff --git a/mod_compliance_2023/mod_compliance_2023.lua b/mod_compliance_2023/mod_compliance_2023.lua new file mode 100644 --- /dev/null +++ b/mod_compliance_2023/mod_compliance_2023.lua @@ -0,0 +1,79 @@ +-- Copyright (c) 2021 Kim Alvefur +-- +-- This module is MIT licensed. + +local hostmanager = require "core.hostmanager"; + +local array = require "util.array"; +local set = require "util.set"; + +local modules_enabled = module:get_option_inherited_set("modules_enabled"); + +for host in pairs(hostmanager.get_children(module.host)) do + local component = module:context(host):get_option_string("component_module"); + if component then + modules_enabled:add(component); + modules_enabled:include(module:context(host):get_option_set("modules_enabled", {})); + end +end + +local function check(suggested, alternate, ...) + if set.intersection(modules_enabled, set.new({suggested; alternate; ...})):empty() then return suggested; end + return false; +end + +local compliance = { + array {"Server"; check("tls"); check("disco")}; + + array {"Advanced Server"; check("pep", "pep_simple")}; + + array {"Web"; check("bosh"); check("websocket")}; + + -- No Server requirements for Advanced Web + + array {"IM"; check("vcard_legacy", "vcard"); check("carbons"); check("http_file_share", "http_upload")}; + + array { + "Advanced IM"; + check("vcard_legacy", "vcard"); + check("blocklist"); + check("muc"); + check("private"); + check("smacks"); + check("mam"); + check("bookmarks"); + }; + + array {"Mobile"; check("smacks"); check("csi_simple", "csi_battery_saver")}; + + array {"Advanced Mobile"; check("cloud_notify")}; + + array {"A/V Calling"; check("turn_external", "external_services", "turncredentials", "extdisco")}; + +}; + +function check_compliance() + local compliant = true; + for _, suite in ipairs(compliance) do + local section = suite:pop(1); + if module:get_option_boolean("compliance_" .. section:lower():gsub("%A", "_"), true) then + local missing = set.new(suite:filter(function(m) return type(m) == "string" end):map(function(m) return "mod_" .. m end)); + if suite[1] then + if compliant then + compliant = false; + module:log("warn", "Missing some modules for XMPP Compliance 2023"); + end + module:log("info", "%s Compliance: %s", section, missing); + end + end + end + + if compliant then module:log("info", "XMPP Compliance 2023: Compliant ✔️"); end +end + +if prosody.start_time then + check_compliance() +else + module:hook_global("server-started", check_compliance); +end +

---
labels:
- 'Stage-Beta'
summary: 'Impose rate-limits on a MUC'
...

Introduction
============

This module allows you to control the maximum rate of 'events' in a MUC
room. This makes it useful to prevent room floods (whether malicious or
accidental).

Details
=======

This module limits the following events:

-   Room joins
-   Nick changes
-   Status changes
-   Messages (including private messages)

The limit is for the room as a whole, not individual occupants in the
room. Users with an affiliation (members, admins and owners) are not
limited.

Configuration
=============

Add the module to the MUC host (not the global modules\_enabled):

```lua
Component "conference.example.com" "muc"
    modules_enabled = { "muc_limits" }
```

You can define (globally or per-MUC component) the following options:

  Name                        Default value   Description
  --------------------------- --------------- ----------------------------------------------------------
  muc_event_rate              0.5             The maximum number of events per second.
  muc_burst_factor            6               Allow temporary bursts of this multiple.
  muc_max_nick_length         23              The maximum allowed length of user nicknames
  muc_max_char_count          5664            The maximum allowed number of bytes in a message
  muc_max_line_count          23              The maximum allowed number of lines in a message
  muc_limit_base_cost         1               Base cost of sending a stanza
  muc_line_count_multiplier   0.1             Additional cost of each newline in the body of a message

For more understanding of how these values are used, see the algorithm
section below.

Algorithm
=========

A certain number of events are allowed per second, given by
muc\_event\_rate. An event rate of 1 allows one event per second, and
event rate of 3 allows three events per second, and 0.5 allows one event
every two seconds, and so on.

Obviously MUC conversations are not exactly steady streams of events.
Sometimes multiple people will talk at once. This is handled by the
muc\_burst\_factor option.

A burst factor of 2 will allow 2 times as many events at once, for 2
seconds, before throttling will be triggered. A factor of 5, 5 times as
many events for 5 seconds.

When the limit is reached, an error response will be generated telling
the user the MUC is overactive, and asking them to try again.

Compatibility
=============

  ------- -------
  trunk*  Works
  0.12    Works
  ------- -------

*as of 2024-10-22