prosody
1937b3c3efb5
plugins/adhoc/mod_adhoc.lua

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plugins/adhoc/mod_adhoc.lua @ 11540:1937b3c3efb5 0.11

mod_c2s, mod_s2s, mod_component, mod_bosh, mod_websockets: Set default stanza size limits c2s/bosh/ws streams will default to 256KB, s2s and components to 512KB. These values are aligned with ejabberd's default settings, which should reduce issues related to inconsistent size limits between servers on the XMPP network. The previous default (10MB) is excessive for any production server, and allows significant memory usage by even unauthenticated sessions.
author Matthew Wild <mwild1@gmail.com>
date Fri, 07 May 2021 17:03:49 +0100
parent 9571:5c475f6e89a4
child 10542:f1886a48a6d4
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1 -- Copyright (C) 2009 Thilo Cestonaro
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2 -- Copyright (C) 2009-2011 Florian Zeitz
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3 --
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4 -- This file is MIT/X11 licensed. Please see the
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5 -- COPYING file in the source package for more information.
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6 --
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7
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8 local it = require "util.iterators";
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9 local st = require "util.stanza";
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10 local is_admin = require "core.usermanager".is_admin;
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11 local jid_split = require "util.jid".split;
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12 local adhoc_handle_cmd = module:require "adhoc".handle_cmd;
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13 local xmlns_cmd = "http://jabber.org/protocol/commands";
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14 local commands = {};
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15
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16 module:add_feature(xmlns_cmd);
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17
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18 module:hook("host-disco-info-node", function (event)
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19 local stanza, origin, reply, node = event.stanza, event.origin, event.reply, event.node;
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20 if commands[node] then
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21 local from = stanza.attr.from;
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22 local privileged = is_admin(from, stanza.attr.to);
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23 local global_admin = is_admin(from);
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24 local username, hostname = jid_split(from);
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25 local command = commands[node];
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26 if (command.permission == "admin" and privileged)
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27 or (command.permission == "global_admin" and global_admin)
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28 or (command.permission == "local_user" and hostname == module.host)
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29 or (command.permission == "user") then
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30 reply:tag("identity", { name = command.name,
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31 category = "automation", type = "command-node" }):up();
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32 reply:tag("feature", { var = xmlns_cmd }):up();
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33 reply:tag("feature", { var = "jabber:x:data" }):up();
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34 event.exists = true;
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35 else
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36 origin.send(st.error_reply(stanza, "auth", "forbidden", "This item is not available to you"));
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37 return true;
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38 end
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39 elseif node == xmlns_cmd then
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40 reply:tag("identity", { name = "Ad-Hoc Commands",
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41 category = "automation", type = "command-list" }):up();
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42 event.exists = true;
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43 end
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44 end);
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45
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46 module:hook("host-disco-items-node", function (event)
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47 local stanza, reply, disco_node = event.stanza, event.reply, event.node;
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48 if disco_node ~= xmlns_cmd then
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49 return;
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50 end
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51
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52 local from = stanza.attr.from;
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53 local admin = is_admin(from, stanza.attr.to);
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54 local global_admin = is_admin(from);
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55 local username, hostname = jid_split(from);
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56 for node, command in it.sorted_pairs(commands) do
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57 if (command.permission == "admin" and admin)
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58 or (command.permission == "global_admin" and global_admin)
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59 or (command.permission == "local_user" and hostname == module.host)
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60 or (command.permission == "user") then
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61 reply:tag("item", { name = command.name,
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62 node = node, jid = module:get_host() });
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63 reply:up();
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64 end
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65 end
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66 event.exists = true;
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67 end);
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68
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69 module:hook("iq-set/host/"..xmlns_cmd..":command", function (event)
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70 local origin, stanza = event.origin, event.stanza;
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71 local node = stanza.tags[1].attr.node
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72 local command = commands[node];
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73 if command then
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74 local from = stanza.attr.from;
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75 local admin = is_admin(from, stanza.attr.to);
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76 local global_admin = is_admin(from);
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77 local username, hostname = jid_split(from);
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78 if (command.permission == "admin" and not admin)
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79 or (command.permission == "global_admin" and not global_admin)
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80 or (command.permission == "local_user" and hostname ~= module.host) then
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81 origin.send(st.error_reply(stanza, "auth", "forbidden", "You don't have permission to execute this command"):up()
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82 :add_child(commands[node]:cmdtag("canceled")
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83 :tag("note", {type="error"}):text("You don't have permission to execute this command")));
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84 return true
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85 end
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86 -- User has permission now execute the command
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87 adhoc_handle_cmd(commands[node], origin, stanza);
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88 return true;
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89 end
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90 end, 500);
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91
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92 local function adhoc_added(event)
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93 local item = event.item;
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94 commands[item.node] = item;
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95 end
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96
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97 local function adhoc_removed(event)
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98 commands[event.item.node] = nil;
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99 end
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100
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101 module:handle_items("adhoc", adhoc_added, adhoc_removed); -- COMPAT pre module:provides() introduced in 0.9
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102 module:handle_items("adhoc-provider", adhoc_added, adhoc_removed);