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mod_delegation/mod_delegation.lua @ 2391:85d04dd87f14
mod_reload_components: add new module and README file.
author | Camilo <camilo@camilo.fm> |
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date | Mon, 21 Nov 2016 16:18:32 -0200 |
parent | 2069:cf9cd666ba00 |
child | 2752:d0e75bf21d30 |
rev | line source |
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1 -- XEP-0355 (Namespace Delegation) |
2067 | 2 -- Copyright (C) 2015-2016 Jérôme Poisson |
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3 -- |
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4 -- This module 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 -- This module manage namespace delegation, a way to delegate server features |
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8 -- to an external entity/component. Only the admin mode is implemented so far |
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9 |
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10 -- TODO: client mode |
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11 |
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12 local jid = require("util.jid") |
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13 local st = require("util.stanza") |
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14 local set = require("util.set") |
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15 |
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16 local delegation_session = module:shared("/*/delegation/session") |
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17 |
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18 if delegation_session.connected_cb == nil then |
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19 -- set used to have connected event listeners |
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20 -- which allow a host to react on events from |
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21 -- other hosts |
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22 delegation_session.connected_cb = set.new() |
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23 end |
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24 local connected_cb = delegation_session.connected_cb |
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25 |
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26 local _DELEGATION_NS = 'urn:xmpp:delegation:1' |
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27 local _FORWARDED_NS = 'urn:xmpp:forward:0' |
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28 local _DISCO_NS = 'http://jabber.org/protocol/disco#info' |
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29 local _DATA_NS = 'jabber:x:data' |
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30 |
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31 local _MAIN_SEP = '::' |
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32 local _BARE_SEP = ':bare:' |
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33 local _MAIN_PREFIX = _DELEGATION_NS.._MAIN_SEP |
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34 local _BARE_PREFIX = _DELEGATION_NS.._BARE_SEP |
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35 local _PREFIXES = {_MAIN_PREFIX, _BARE_PREFIX} |
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36 |
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37 local disco_nest |
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38 |
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39 module:log("debug", "Loading namespace delegation module "); |
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40 |
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41 --> Configuration management <-- |
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42 |
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43 local ns_delegations = module:get_option("delegations", {}) |
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44 |
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45 local jid2ns = {} |
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46 for namespace, ns_data in pairs(ns_delegations) do |
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47 -- "connected" contain the full jid of connected managing entity |
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48 ns_data.connected = nil |
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49 if ns_data.jid then |
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50 if jid2ns[ns_data.jid] == nil then |
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51 jid2ns[ns_data.jid] = {} |
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52 end |
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53 jid2ns[ns_data.jid][namespace] = ns_data |
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54 module:log("debug", "Namespace %s is delegated%s to %s", namespace, ns_data.filtering and " (with filtering)" or "", ns_data.jid) |
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55 else |
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56 module:log("warn", "Ignoring delegation for %s: no jid specified", tostring(namespace)) |
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57 ns_delegations[namespace] = nil |
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58 end |
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59 end |
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60 |
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61 |
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62 local function advertise_delegations(session, to_jid) |
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63 -- send <message/> stanza to advertise delegations |
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64 -- as expained in § 4.2 |
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65 local message = st.message({from=module.host, to=to_jid}) |
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66 :tag("delegation", {xmlns=_DELEGATION_NS}) |
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67 |
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68 -- we need to check if a delegation is granted because the configuration |
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69 -- can be complicated if some delegations are granted to bare jid |
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70 -- and other to full jids, and several resources are connected. |
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71 local have_delegation = false |
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72 |
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73 for namespace, ns_data in pairs(jid2ns[to_jid]) do |
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74 if ns_data.connected == to_jid then |
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75 have_delegation = true |
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76 message:tag("delegated", {namespace=namespace}) |
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77 if type(ns_data.filtering) == "table" then |
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78 for _, attribute in pairs(ns_data.filtering) do |
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79 message:tag("attribute", {name=attribute}):up() |
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80 end |
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81 message:up() |
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82 end |
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83 end |
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84 end |
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85 |
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86 if have_delegation then |
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87 session.send(message) |
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88 end |
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89 end |
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90 |
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91 local function set_connected(entity_jid) |
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92 -- set the "connected" key for all namespace managed by entity_jid |
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93 -- if the namespace has already a connected entity, ignore the new one |
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94 local function set_config(jid_) |
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95 for namespace, ns_data in pairs(jid2ns[jid_]) do |
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96 if ns_data.connected == nil then |
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97 ns_data.connected = entity_jid |
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98 disco_nest(namespace, entity_jid) |
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99 end |
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100 end |
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101 end |
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102 local bare_jid = jid.bare(entity_jid) |
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103 set_config(bare_jid) |
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104 -- We can have a bare jid of a full jid specified in configuration |
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105 -- so we try our luck with both (first connected resource will |
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106 -- manage the namespaces in case of bare jid) |
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107 if bare_jid ~= entity_jid then |
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108 set_config(entity_jid) |
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109 jid2ns[entity_jid] = jid2ns[bare_jid] |
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110 end |
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111 end |
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112 |
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113 local function on_presence(event) |
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114 local session = event.origin |
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115 local bare_jid = jid.bare(session.full_jid) |
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116 |
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117 if jid2ns[bare_jid] or jid2ns[session.full_jid] then |
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118 set_connected(session.full_jid) |
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119 advertise_delegations(session, session.full_jid) |
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120 end |
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121 end |
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122 |
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123 local function on_component_connected(event) |
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124 -- method called by the module loaded by the component |
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125 -- /!\ the event come from the component host, |
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126 -- not from the host of this module |
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127 local session = event.session |
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128 local bare_jid = jid.join(session.username, session.host) |
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129 |
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130 local jid_delegations = jid2ns[bare_jid] |
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131 if jid_delegations ~= nil then |
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132 set_connected(bare_jid) |
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133 advertise_delegations(session, bare_jid) |
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134 end |
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135 end |
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136 |
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137 local function on_component_auth(event) |
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138 -- react to component-authenticated event from this host |
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139 -- and call the on_connected methods from all other hosts |
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140 -- needed for the component to get delegations advertising |
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141 for callback in connected_cb:items() do |
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142 callback(event) |
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143 end |
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144 end |
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145 |
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146 if module:get_host_type() ~= "component" then |
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147 connected_cb:add(on_component_connected) |
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148 end |
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149 module:hook('component-authenticated', on_component_auth) |
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150 module:hook('presence/initial', on_presence) |
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151 |
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152 |
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153 --> delegated namespaces hook <-- |
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154 |
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155 local managing_ent_error |
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156 local stanza_cache = {} -- we cache original stanza to build reply |
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157 |
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158 local function managing_ent_result(event) |
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159 -- this function manage iq results from the managing entity |
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160 -- it do a couple of security check before sending the |
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161 -- result to the managed entity |
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162 local stanza = event.stanza |
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163 if stanza.attr.to ~= module.host then |
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164 module:log("warn", 'forwarded stanza result has "to" attribute not addressed to current host, id conflict ?') |
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165 return |
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166 end |
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167 module:unhook("iq-result/host/"..stanza.attr.id, managing_ent_result) |
1721
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168 module:unhook("iq-error/host/"..stanza.attr.id, managing_ent_error) |
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169 |
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170 -- lot of checks to do... |
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171 local delegation = stanza.tags[1] |
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172 if #stanza ~= 1 or delegation.name ~= "delegation" or |
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173 delegation.attr.xmlns ~= _DELEGATION_NS then |
1719
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174 module:log("warn", "ignoring invalid iq result from managing entity %s", stanza.attr.from) |
1720
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175 stanza_cache[stanza.attr.from][stanza.attr.id] = nil |
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176 return true |
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177 end |
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178 |
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179 local forwarded = delegation.tags[1] |
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180 if #delegation ~= 1 or forwarded.name ~= "forwarded" or |
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181 forwarded.attr.xmlns ~= _FORWARDED_NS then |
1719
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182 module:log("warn", "ignoring invalid iq result from managing entity %s", stanza.attr.from) |
1720
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183 stanza_cache[stanza.attr.from][stanza.attr.id] = nil |
1710
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184 return true |
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185 end |
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186 |
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187 local iq = forwarded.tags[1] |
1723
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188 if #forwarded ~= 1 or iq.name ~= "iq" or |
1724
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189 iq.attr.xmlns ~= 'jabber:client' or |
1774
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190 (iq.attr.type =='result' and #iq > 1) or |
1723
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191 (iq.attr.type == 'error' and #iq > 2) then |
1719
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192 module:log("warn", "ignoring invalid iq result from managing entity %s", stanza.attr.from) |
1720
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193 stanza_cache[stanza.attr.from][stanza.attr.id] = nil |
1710
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194 return true |
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|
195 end |
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196 |
1724
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197 iq.attr.xmlns = nil |
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198 |
1720
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199 local original = stanza_cache[stanza.attr.from][stanza.attr.id] |
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200 stanza_cache[stanza.attr.from][stanza.attr.id] = nil |
1723
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201 -- we get namespace from original and not iq |
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202 -- because the namespace can be lacking in case of error |
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203 local namespace = original.tags[1].attr.xmlns |
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|
204 local ns_data = ns_delegations[namespace] |
1710
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205 |
1723
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206 if stanza.attr.from ~= ns_data.connected or (iq.attr.type ~= "result" and iq.attr.type ~= "error") or |
1710
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207 iq.attr.id ~= original.attr.id or iq.attr.to ~= original.attr.from then |
1719
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|
208 module:log("warn", "ignoring forbidden iq result from managing entity %s, please check that the component is no trying to do something bad (stanza: %s)", stanza.attr.from, tostring(stanza)) |
1710
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|
209 module:send(st.error_reply(original, 'cancel', 'service-unavailable')) |
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|
210 return true |
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|
211 end |
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|
212 |
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|
213 -- at this point eveything is checked, |
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|
214 -- and we (hopefully) can send the the result safely |
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|
215 module:send(iq) |
1724
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|
216 return true |
1710
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217 end |
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218 |
1721
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diff
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|
219 function managing_ent_error(event) |
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diff
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220 local stanza = event.stanza |
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diff
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221 if stanza.attr.to ~= module.host then |
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222 module:log("warn", 'Stanza result has "to" attribute not addressed to current host, id conflict ?') |
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diff
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|
223 return |
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diff
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224 end |
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225 module:unhook("iq-result/host/"..stanza.attr.id, managing_ent_result) |
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226 module:unhook("iq-error/host/"..stanza.attr.id, managing_ent_error) |
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227 local original = stanza_cache[stanza.attr.from][stanza.attr.id] |
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228 stanza_cache[stanza.attr.from][stanza.attr.id] = nil |
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229 module:log("warn", "Got an error after forwarding stanza to "..stanza.attr.from) |
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230 module:send(st.error_reply(original, 'cancel', 'service-unavailable')) |
1724
2440a75e868f
mod_delegation: managing_ent_* now stop event propagation + forwarded <iq/> xmlns check
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1723
diff
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|
231 return true |
1721
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232 end |
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233 |
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|
234 local function forward_iq(stanza, ns_data) |
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235 local to_jid = ns_data.connected |
1722
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mod_delegation: fixed namespace of <forwarded/> child element, as specified in XEP-0297
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|
236 stanza.attr.xmlns = 'jabber:client' |
1710
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237 local iq_stanza = st.iq({ from=module.host, to=to_jid, type="set" }) |
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238 :tag("delegation", { xmlns=_DELEGATION_NS }) |
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239 :tag("forwarded", { xmlns=_FORWARDED_NS }) |
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240 :add_child(stanza) |
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241 local iq_id = iq_stanza.attr.id |
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242 -- we save the original stanza to check the managing entity result |
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mod_delegation: original stanza is now cached outside of ns_data, so it can be accessed without knowing the namespace.
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1719
diff
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|
243 if not stanza_cache[to_jid] then stanza_cache[to_jid] = {} end |
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244 stanza_cache[to_jid][iq_id] = stanza |
1710
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245 module:hook("iq-result/host/"..iq_id, managing_ent_result) |
1721
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246 module:hook("iq-error/host/"..iq_id, managing_ent_error) |
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|
247 module:log("debug", "stanza forwarded") |
1710
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248 module:send(iq_stanza) |
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249 end |
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|
250 |
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|
251 local function iq_hook(event) |
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252 -- general hook for all the iq which forward delegated ones |
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253 -- and continue normal behaviour else. If a namespace is |
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|
254 -- delegated but managing entity is offline, a service-unavailable |
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255 -- error will be sent, as requested by the XEP |
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256 local session, stanza = event.origin, event.stanza |
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diff
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257 if #stanza == 1 and stanza.attr.type == 'get' or stanza.attr.type == 'set' then |
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258 local namespace = stanza.tags[1].attr.xmlns |
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|
259 local ns_data = ns_delegations[namespace] |
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|
260 |
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diff
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|
261 if ns_data then |
1715
241c061bb953
mod_delegation: we don't forward stanzas from managing entity itself
Goffi <goffi@goffi.org>
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1714
diff
changeset
|
262 if stanza.attr.from == ns_data.connected then |
241c061bb953
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1714
diff
changeset
|
263 -- we don't forward stanzas from managing entity itself |
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diff
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|
264 return |
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1714
diff
changeset
|
265 end |
1710
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diff
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|
266 if ns_data.filtering then |
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parents:
1709
diff
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|
267 local first_child = stanza.tags[1] |
1988
d7c1daaf2dea
mod_delegation: fixed attribute filtering
Goffi <goffi@goffi.org>
parents:
1776
diff
changeset
|
268 for _, attribute in pairs(ns_data.filtering) do |
1710
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diff
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269 -- if any filtered attribute if not present, |
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|
270 -- we must continue the normal bahaviour |
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|
271 if not first_child.attr[attribute] then |
1711
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diff
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|
272 -- Filtered attribute is not present, we do normal workflow |
1710
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|
273 return; |
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diff
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|
274 end |
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diff
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|
275 end |
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diff
changeset
|
276 end |
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diff
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|
277 if not ns_data.connected then |
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1709
diff
changeset
|
278 module:log("warn", "No connected entity to manage "..namespace) |
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1709
diff
changeset
|
279 session.send(st.error_reply(stanza, 'cancel', 'service-unavailable')) |
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diff
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|
280 else |
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parents:
1709
diff
changeset
|
281 forward_iq(stanza, ns_data) |
b68eed25b880
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diff
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|
282 end |
b68eed25b880
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parents:
1709
diff
changeset
|
283 return true |
b68eed25b880
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1709
diff
changeset
|
284 else |
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parents:
1709
diff
changeset
|
285 -- we have no delegation, we continue normal behaviour |
b68eed25b880
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parents:
1709
diff
changeset
|
286 return |
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parents:
1709
diff
changeset
|
287 end |
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parents:
1709
diff
changeset
|
288 end |
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parents:
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diff
changeset
|
289 end |
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1709
diff
changeset
|
290 |
b68eed25b880
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parents:
1709
diff
changeset
|
291 module:hook("iq/self", iq_hook, 2^32) |
1718
48be6e7efbe8
mod_delegation: added 'iq/bare' to hooked events.
Goffi <goffi@goffi.org>
parents:
1717
diff
changeset
|
292 module:hook("iq/bare", iq_hook, 2^32) |
1710
b68eed25b880
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1709
diff
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|
293 module:hook("iq/host", iq_hook, 2^32) |
1711
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diff
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|
294 |
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diff
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|
295 |
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diff
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|
296 --> discovery nesting <-- |
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diff
changeset
|
297 |
1712
c1973605d096
mod_delegation: disco nesting for host
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1711
diff
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|
298 -- disabling internal features/identities |
c1973605d096
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1711
diff
changeset
|
299 |
1716
29dfdfc767b4
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parents:
1715
diff
changeset
|
300 local function find_form_type(stanza) |
29dfdfc767b4
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parents:
1715
diff
changeset
|
301 local form_type = nil |
2069
cf9cd666ba00
mod_delegation: fixed bad use of period instead of colon
Goffi <goffi@goffi.org>
parents:
2067
diff
changeset
|
302 for field in stanza:childtags('field', 'jabber:x:data') do |
1716
29dfdfc767b4
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parents:
1715
diff
changeset
|
303 if field.attr.var=='FORM_TYPE' and field.attr.type=='hidden' then |
29dfdfc767b4
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Goffi <goffi@goffi.org>
parents:
1715
diff
changeset
|
304 local value = field:get_child('value') |
29dfdfc767b4
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parents:
1715
diff
changeset
|
305 if not value then |
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parents:
1715
diff
changeset
|
306 module:log("warn", "No value found in FORM_TYPE field: "..tostring(stanza)) |
29dfdfc767b4
mod_delegation: service discovery extensions (xep-0128) management
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parents:
1715
diff
changeset
|
307 else |
29dfdfc767b4
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parents:
1715
diff
changeset
|
308 form_type=value.get_text() |
29dfdfc767b4
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parents:
1715
diff
changeset
|
309 end |
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diff
changeset
|
310 end |
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parents:
1715
diff
changeset
|
311 end |
29dfdfc767b4
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parents:
1715
diff
changeset
|
312 return form_type |
29dfdfc767b4
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parents:
1715
diff
changeset
|
313 end |
29dfdfc767b4
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parents:
1715
diff
changeset
|
314 |
1711
55b9ac807ac9
mod_delegation: delegated features/identities are removed from disco.
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parents:
1710
diff
changeset
|
315 -- modules whose features/identities are managed by delegation |
55b9ac807ac9
mod_delegation: delegated features/identities are removed from disco.
Goffi <goffi@goffi.org>
parents:
1710
diff
changeset
|
316 local disabled_modules = set.new() |
1713
01e9465f8f80
mod_delegation: delegated features/identities removal for disco info requests on bare jid
Goffi <goffi@goffi.org>
parents:
1712
diff
changeset
|
317 local disabled_identities = set.new() |
1711
55b9ac807ac9
mod_delegation: delegated features/identities are removed from disco.
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parents:
1710
diff
changeset
|
318 |
55b9ac807ac9
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Goffi <goffi@goffi.org>
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1710
diff
changeset
|
319 local function identity_added(event) |
55b9ac807ac9
mod_delegation: delegated features/identities are removed from disco.
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parents:
1710
diff
changeset
|
320 local source = event.source |
55b9ac807ac9
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parents:
1710
diff
changeset
|
321 if disabled_modules:contains(source) then |
55b9ac807ac9
mod_delegation: delegated features/identities are removed from disco.
Goffi <goffi@goffi.org>
parents:
1710
diff
changeset
|
322 local item = event.item |
55b9ac807ac9
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parents:
1710
diff
changeset
|
323 local category, type_, name = item.category, item.type, item.name |
55b9ac807ac9
mod_delegation: delegated features/identities are removed from disco.
Goffi <goffi@goffi.org>
parents:
1710
diff
changeset
|
324 module:log("debug", "Removing (%s/%s%s) identity because of delegation", category, type_, name and "/"..name or "") |
1713
01e9465f8f80
mod_delegation: delegated features/identities removal for disco info requests on bare jid
Goffi <goffi@goffi.org>
parents:
1712
diff
changeset
|
325 disabled_identities:add(item) |
1711
55b9ac807ac9
mod_delegation: delegated features/identities are removed from disco.
Goffi <goffi@goffi.org>
parents:
1710
diff
changeset
|
326 source:remove_item("identity", item) |
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327 end |
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328 end |
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329 |
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330 local function feature_added(event) |
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331 local source, item = event.source, event.item |
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332 for namespace, _ in pairs(ns_delegations) do |
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333 if source ~= module and string.sub(item, 1, #namespace) == namespace then |
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334 module:log("debug", "Removing %s feature which is delegated", item) |
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335 source:remove_item("feature", item) |
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336 disabled_modules:add(source) |
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337 if source.items and source.items.identity then |
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338 -- we remove all identities added by the source module |
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339 -- that can cause issues if the module manages several features/identities |
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340 -- but this case is probably rare (or doesn't happen at all) |
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341 -- FIXME: any better way ? |
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342 for _, identity in pairs(source.items.identity) do |
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343 identity_added({source=source, item=identity}) |
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344 end |
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345 end |
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346 end |
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347 end |
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348 end |
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349 |
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350 local function extension_added(event) |
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351 local source, stanza = event.source, event.item |
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352 local form_type = find_form_type(stanza) |
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353 if not form_type then return; end |
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354 |
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355 for namespace, _ in pairs(ns_delegations) do |
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356 if source ~= module and string.sub(form_type, 1, #namespace) == namespace then |
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357 module:log("debug", "Removing extension which is delegated: %s", tostring(stanza)) |
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358 source:remove_item("extension", stanza) |
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359 end |
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360 end |
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361 end |
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362 |
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363 -- for disco nesting (see § 7.2) we need to remove internal features |
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364 -- we use handle_items as it allow to remove already added features |
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365 -- and catch the ones which can come later |
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366 module:handle_items("feature", feature_added, function(_) end) |
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367 module:handle_items("identity", identity_added, function(_) end, false) |
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368 module:handle_items("extension", extension_added, function(_) end) |
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369 |
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370 |
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371 -- managing entity features/identities collection |
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372 |
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373 local disco_error |
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374 local bare_features = set.new() |
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375 local bare_identities = {} |
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376 local bare_extensions = {} |
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377 |
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378 local function disco_result(event) |
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379 -- parse result from disco nesting request |
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380 -- and fill module features/identities and bare_features/bare_identities accordingly |
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381 local session, stanza = event.origin, event.stanza |
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382 if stanza.attr.to ~= module.host then |
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383 module:log("warn", 'Stanza result has "to" attribute not addressed to current host, id conflict ?') |
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384 return |
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385 end |
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386 module:unhook("iq-result/host/"..stanza.attr.id, disco_result) |
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387 module:unhook("iq-error/host/"..stanza.attr.id, disco_error) |
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388 local query = stanza:get_child("query", _DISCO_NS) |
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389 if not query or not query.attr.node then |
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390 session.send(st.error_reply(stanza, 'modify', 'not-acceptable')) |
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391 return true |
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392 end |
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393 |
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394 local node = query.attr.node |
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395 local main |
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396 |
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397 if string.sub(node, 1, #_MAIN_PREFIX) == _MAIN_PREFIX then |
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398 main=true |
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399 elseif string.sub(node, 1, #_BARE_PREFIX) == _BARE_PREFIX then |
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400 main=false |
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401 else |
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402 module:log("warn", "Unexpected node: "..node) |
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403 session.send(st.error_reply(stanza, 'modify', 'not-acceptable')) |
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404 return true |
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405 end |
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406 |
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407 for feature in query:childtags("feature") do |
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408 local namespace = feature.attr.var |
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409 if main then |
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410 module:add_feature(namespace) |
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411 else |
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412 bare_features:add(namespace) |
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413 end |
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414 end |
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415 for identity in query:childtags("identity") do |
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416 local category, type_, name = identity.attr.category, identity.attr.type, identity.attr.name |
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417 if main then |
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418 module:add_identity(category, type_, name) |
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419 else |
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420 table.insert(bare_identities, {category=category, type=type_, name=name}) |
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421 end |
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422 end |
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423 for extension in query:childtags("x", _DATA_NS) do |
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424 if main then |
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425 module:add_extension(extension) |
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426 else |
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427 table.insert(bare_extensions, extension) |
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428 end |
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429 end |
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430 end |
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431 |
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432 function disco_error(event) |
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433 local stanza = event.stanza |
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434 if stanza.attr.to ~= module.host then |
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435 module:log("warn", 'Stanza result has "to" attribute not addressed to current host, id conflict ?') |
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436 return |
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437 end |
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438 module:unhook("iq-result/host/"..stanza.attr.id, disco_result) |
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439 module:unhook("iq-error/host/"..stanza.attr.id, disco_error) |
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440 module:log("warn", "Got an error while requesting disco for nesting to "..stanza.attr.from) |
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441 module:log("warn", "Ignoring disco nesting") |
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442 end |
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443 |
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444 function disco_nest(namespace, entity_jid) |
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445 -- manage discovery nesting (see § 7.2) |
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446 |
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447 -- first we reset the current values |
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448 if module.items then |
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449 module.items['feature'] = nil |
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450 module.items['identity'] = nil |
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451 module.items['extension'] = nil |
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452 bare_features = set.new() |
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453 bare_identities = {} |
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454 bare_extensions = {} |
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455 end |
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456 |
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457 for _, prefix in ipairs(_PREFIXES) do |
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458 local node = prefix..namespace |
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459 |
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460 local iq = st.iq({from=module.host, to=entity_jid, type='get'}) |
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461 :tag('query', {xmlns=_DISCO_NS, node=node}) |
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462 |
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463 local iq_id = iq.attr.id |
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464 |
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465 module:hook("iq-result/host/"..iq_id, disco_result) |
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466 module:hook("iq-error/host/"..iq_id, disco_error) |
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467 module:send(iq) |
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468 end |
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469 end |
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470 |
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471 -- disco to bare jids special case |
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472 |
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473 module:hook("account-disco-info", function(event) |
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474 -- this event is called when a disco info request is done on a bare jid |
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475 -- we get the final reply and filter delegated features/identities/extensions |
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476 local reply = event.reply; |
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477 reply.tags[1]:maptags(function(child) |
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478 if child.name == 'feature' then |
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479 local feature_ns = child.attr.var |
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480 for namespace, _ in pairs(ns_delegations) do |
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481 if string.sub(feature_ns, 1, #namespace) == namespace then |
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482 module:log("debug", "Removing feature namespace %s which is delegated", feature_ns) |
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483 return nil |
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484 end |
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485 end |
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486 elseif child.name == 'identity' then |
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487 for item in disabled_identities:items() do |
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488 if item.category == child.attr.category |
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489 and item.type == child.attr.type |
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490 -- we don't check name, because mod_pep use a name for main disco, but not in account-disco-info hook |
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491 -- and item.name == child.attr.name |
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492 then |
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493 module:log("debug", "Removing (%s/%s%s) identity because of delegation", item.category, item.type, item.name and "/"..item.name or "") |
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494 return nil |
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495 end |
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496 end |
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497 elseif child.name == 'x' and child.attr.xmlns == _DATA_NS then |
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498 local form_type = find_form_type(child) |
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499 if form_type then |
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500 for namespace, _ in pairs(ns_delegations) do |
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501 if string.sub(form_type, 1, #namespace) == namespace then |
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502 module:log("debug", "Removing extension which is delegated: %s", tostring(child)) |
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503 return nil |
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504 end |
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505 end |
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506 end |
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507 |
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508 end |
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509 return child |
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510 end) |
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511 for feature in bare_features:items() do |
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512 reply:tag('feature', {var=feature}):up() |
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513 end |
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514 for _, item in ipairs(bare_identities) do |
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515 reply:tag('identity', {category=item.category, type=item.type, name=item.name}):up() |
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516 end |
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517 for _, stanza in ipairs(bare_extensions) do |
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518 reply:add_child(stanza) |
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519 end |
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520 |
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521 end, -2^32); |