Mercurial > prosody-modules

annotate mod_muc_mav/mod_muc_mav.lua @ 6556:7477e97a9045

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mod_firewall: Apply pre-reload state before re-reading config This change makes load/reload a bit more robust. module.load() runs before module.restore() and it reads from the config and updates the state (if needed). However, after this, module.restore() could run and apply the old state again.
author Matthew Wild <mwild1@gmail.com>
date Sun, 24 May 2026 20:03:20 +0100
parents 19bee2a6436a
children
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1 local st = require "util.stanza";
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2 local hashes = require "util.hashes";
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3 local base64 = require "util.encodings".base64;
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4 local util_jid = require "util.jid";
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5
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6 local mod_muc = module:depends"muc";
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7
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8 local xmlns_mav = "urn:xmpp:muc:affiliations:1";
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9 local xmlns_muc = "http://jabber.org/protocol/muc";
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10 local xmlns_muc_user = "http://jabber.org/protocol/muc#user";
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11 local xmlns_occupant_id = "urn:xmpp:occupant-id:0";
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12
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13 local mav_versions = {}
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14
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15 local function get_affiliations(from, room, hash_only)
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16 local mav_since = nil
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17 local jid_affiliations = {}
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18 local xs = {}
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19 local x = st.stanza("x", {xmlns = xmlns_muc_user;});
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20 local count = 0
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21 for jid, affiliation, affiliation_data in room:each_affiliation() do
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22 table.insert(jid_affiliations, jid.."\0"..affiliation);
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23 if not hash_only then
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24 local occupant_id = room:get_occupant_id_from_jid(jid);
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25 local nick = affiliation_data and affiliation_data.reserved_nickname or nil;
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26 local show_jid = (not room:is_anonymous_for(from) or util_jid.bare(from) == jid) and jid or nil
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27 x:tag("item", {affiliation = affiliation or "none"; jid = show_jid; nick = nick;})
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28 :tag("occupant-id", { xmlns = xmlns_occupant_id, id = occupant_id }):up():up();
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29 count = count + 1
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30 if count > 400 then
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31 table.sort(jid_affiliations)
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32 local hash_input = table.concat(jid_affiliations, "\0")
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33 local hash = base64.encode(hashes.sha256(hash_input))
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34 x:tag("mav", {xmlns = xmlns_mav; since = mav_since; ["until"] = hash;}):up()
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35 table.insert(xs, x)
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36 x = st.stanza("x", {xmlns = xmlns_muc_user;})
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37 count = 0
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38 mav_since = hash
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39 end
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40 end
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41 end
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42 table.sort(jid_affiliations);
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43 local hash_input = table.concat(jid_affiliations, "\0");
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44 local hash = base64.encode(hashes.sha256(hash_input))
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45 if not hash_only and (count > 0 or #xs < 1) then
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46 x:tag("mav", {xmlns = xmlns_mav; since = mav_since; ["until"] = hash;}):up();
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47 table.insert(xs, x);
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48 end
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49 return hash, xs;
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50 end
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51
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52 local function handle_stanza_with_x(room, stanza, mav_current)
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53 local muc_x = stanza:get_child("x", xmlns_muc_user);
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54 local is_initial = false;
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55 for child in muc_x:childtags("status") do
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56 if child.attr.code == "110" then is_initial = true; end;
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57 end
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58 if is_initial then
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59 muc_x:tag("mav", {xmlns = xmlns_mav; ["until"] = mav_current;}):up();
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60 else
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61 -- TODO: stop recomputing the hash on every stanza in the presence flood
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62 local mav_new = get_affiliations(stanza.attr.from, room, true);
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63 if mav_current ~= mav_new then
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64 module:log("info", "Update version of %s from %s to %s in affiliation update", stanza.attr.to, mav_current, mav_new);
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65 muc_x:tag("mav", {xmlns = xmlns_mav; ["since"] = mav_current; ["until"] = mav_new; }):up();
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66 mav_versions[room.jid.."\0"..stanza.attr.to] = mav_new;
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67 end
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68 end
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69 end
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70
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71 local function room_route_stanza(room, stanza)
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72 local muc_x = stanza:get_child("x", xmlns_muc_user);
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73 if muc_x then
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74 local mav_current = mav_versions[room.jid.."\0"..stanza.attr.to];
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75 if mav_current then
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76 if stanza.name == "presence" or stanza.name == "message" then
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77 handle_stanza_with_x(room, stanza, mav_current);
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78 end
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79 end
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80 end
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81 module:send(stanza);
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82 end
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83
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84 -- TODO: Stop this hack
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85 local original_room_route_stanza = mod_muc.room_mt.route_stanza;
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86 mod_muc.room_mt.route_stanza = room_route_stanza;
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87 function module.unload()
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88 mod_muc.room_mt.route_stanza = original_room_route_stanza;
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89 end
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90
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91
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92 module:hook("muc-disco#info", function(event)
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93 event.reply:tag("feature", {var = xmlns_mav}):up();
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94 end);
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95
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96 module:hook("muc-occupant-pre-join", function(event)
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97 local room, stanza = event.room, event.stanza;
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98 local muc_x = stanza:get_child("x", xmlns_muc);
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99 if not muc_x then return; end
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100 local mav_child = muc_x:get_child("mav", xmlns_mav);
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101 if not mav_child then return; end
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102 local mav_since = mav_child.attr["since"];
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103 mav_versions[room.jid.."\0"..stanza.attr.from] = mav_since;
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104 local mav_current, xs = get_affiliations(stanza.attr.from, room);
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105 if mav_current ~= mav_since then
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106 -- TODO: Support for diffs
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107 -- Send full response
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108 module:log("info", "Old version of %s is %s, sending full response for %s", stanza.attr.from, mav_since, mav_current);
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109 for _, x in ipairs(xs) do
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110 local announce_msg = st.message({ from = room.jid, to = stanza.attr.from }):add_child(x);
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111 room:route_stanza(announce_msg);
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112 end
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113 mav_versions[room.jid.."\0"..stanza.attr.from] = mav_current;
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114 else
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115 module:log("info", "Old version of %s is %s, still current", stanza.attr.from, mav_since);
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116 end
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117 end, -100);
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118
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119 module:hook("muc-occupant-left", function(event)
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120 local room, occupant = event.room, event.occupant;
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121 for jid in occupant:each_session() do
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122 mav_versions[room.jid.."\0"..jid] = nil;
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123 end
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124 end);
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125
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126 module:hook("muc-occupant-pre-leave", function(event)
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127 local room, stanza = event.room, event.stanza;
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128 mav_versions[room.jid.."\0"..stanza.attr.from] = nil;
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129 end);