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annotate mod_delegation/README.markdown @ 5536:96dec7681af8

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mod_firewall: Update user marks to store instantly via map store The original approach was to keep marks in memory only, and persist them at shutdown. That saves I/O, at the cost of potentially losing marks on an unclean shutdown. This change persists marks instantly, which may have some performance overhead but should be more "correct". It also splits the marking/unmarking into an event which may be watched or even fired by other modules.
author Matthew Wild <mwild1@gmail.com>
date Thu, 08 Jun 2023 16:20:42 +0100
parents 679f1834dbdb
children
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1 ---
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2 labels:
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3 - 'Stage-Beta'
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4 summary: 'XEP-0355 (Namespace Delegation) implementation'
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5 ...
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6
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7 Introduction
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8 ============
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9
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10 Namespace Delegation is an extension which allows server to delegate some
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11 features handling to an entity/component. Typical use case is an external PEP
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12 service, but it can be used more generally when your preferred server lack one
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13 internal feature, and you found an external component which can do it.
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14
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15 Details
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16 =======
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17
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18 You can have all the details by reading the
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19 [XEP-0355](http://xmpp.org/extensions/xep-0355.html). Only the admin mode is
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20 implemented so far.
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21
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22 Usage
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23 =====
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24
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25 To use the module, like usual add **"delegation"** to your *modules\_enabled*.
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26 Note that if you use it with a local component, you also need to activate the
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27 module in your component section:
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28
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29 modules_enabled = {
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30 [...]
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31
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32 "delegation";
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33 }
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34
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35 [...]
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36
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37 Component "youcomponent.yourdomain.tld"
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38 component_secret = "yourpassword"
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39 modules_enabled = {"delegation"}
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40
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41 then specify delegated namespaces **in your host section** like that:
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42
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43 VirtualHost "yourdomain.tld"
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44
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45 delegations = {
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46 ["urn:xmpp:mam:2"] = {
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47 filtering = {"node"};
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48 jid = "pubsub.yourdomain.tld";
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49 },
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50 ["http://jabber.org/protocol/pubsub"] = {
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51 jid = "pubsub.yourdomain.tld";
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52 },
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53 ["http://jabber.org/protocol/pubsub#owner"] = {
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54 jid = "pubsub.yourdomain.tld";
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55 },
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56 ["urn:xmpp:delegation:2:bare:disco#info:*"] = {
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57 jid = "pubsub.yourdomain.tld";
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58 },
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59 ["urn:xmpp:delegation:2:bare:disco#items:*"] = {
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60 jid = "pubsub.yourdomain.tld";
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61 },
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62
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63 }
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65 Here all MAM requests with a "node" attribute (i.e. all MAM pubsub request) will
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66 be delegated to pubsub.yourdomain.tld. Similarly, all pubsub request to the host
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67 (i.e. the PEP requests) will be delegated to pubsub.yourdomain.tld. Check the
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68 XEP for the meaning of "urn:xmpp:delegation:2:bare:disco#info:*" and
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69 "urn:xmpp:delegation:2:bare:disco#items:*".
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70
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71 **/!\ Be extra careful when you give a delegation to an entity/component, it's a
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72 powerful access, only do it if you absolutely trust the component/entity, and
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73 you know where the software is coming from**
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74
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75 Configuration
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76 =============
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77
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78 The configuration is done with a table which map delegated namespace to
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79 namespace data. Namespace data MUST have a **jid** (in the form **jid =
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80 "delegated@domain.tld"**) and MAY have an additional **filtering** array. If
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81 filtering is present, request with attributes in the array will be delegated,
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82 others will be treated normally (i.e. by Prosody).
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83
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84 If you are not a developer, the delegated namespace(s)/attribute(s) are most
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85 probably specified with the external component/entity you want to use.
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86
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87 The pseudo-namespace `http://jabber.org/protocol/disco#items:*` is used to
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88 delegate remaining disco#items (i.e. items nodes not already handled by Prosody
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89 itself).
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90
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91 Compatibility
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92 =============
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93
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94 If you use it with Prosody 0.9 and a component, you need to patch
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95 core/mod\_component.lua to fire a new signal. To do it, copy the following patch
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96 in a, for example, /tmp/component.patch file:
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98 diff --git a/plugins/mod_component.lua b/plugins/mod_component.lua
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99 --- a/plugins/mod_component.lua
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100 +++ b/plugins/mod_component.lua
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101 @@ -85,6 +85,7 @@
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102 session.type = "component";
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103 module:log("info", "External component successfully authenticated");
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104 session.send(st.stanza("handshake"));
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105 + module:fire_event("component-authenticated", { session = session });
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106
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107 return true;
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108 end
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109
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110 Then, at the root of prosody, enter:
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111
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112 `patch -p1 < /tmp/component.patch`
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113
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114 ----- ----------------------------------------------------
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115 0.11 Works
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116 0.10 Works
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117 0.9 Need a patched core/mod\_component.lua (see above)
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118 ----- ----------------------------------------------------
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119
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120 Note
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121 ====
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122
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123 This module is often used with mod\_privilege (c.f. XEP for more details)