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prosody
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plugins/mod_presence.lua @ 2143:13ac68e8760b
mod_presence: Route incoming presence subscription stanzas (types unsubscribe, subscribed and unsubscribed) to the user before roster pushes.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Sun, 22 Nov 2009 21:47:54 +0500 |
parent | 2142:4b339020607f |
child | 2228:3987078bb179 |
rev | line source |
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1523
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2009 Matthew Wild |
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3 -- Copyright (C) 2008-2009 Waqas Hussain |
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4 -- |
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5 -- This project is MIT/X11 licensed. Please see the |
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6 -- COPYING file in the source package for more information. |
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7 -- |
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8 |
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9 local log = module._log; |
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10 |
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11 local require = require; |
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12 local pairs, ipairs = pairs, ipairs; |
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13 local t_concat, t_insert = table.concat, table.insert; |
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14 local s_find = string.find; |
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15 local tonumber = tonumber; |
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16 |
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17 local st = require "util.stanza"; |
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18 local jid_split = require "util.jid".split; |
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19 local jid_bare = require "util.jid".bare; |
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20 local hosts = hosts; |
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21 |
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22 local rostermanager = require "core.rostermanager"; |
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23 local sessionmanager = require "core.sessionmanager"; |
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24 local offlinemanager = require "core.offlinemanager"; |
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25 |
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26 local _core_route_stanza = core_route_stanza; |
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27 local core_route_stanza; |
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28 function core_route_stanza(origin, stanza) |
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29 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then |
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30 local node, host = jid_split(stanza.attr.to); |
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31 host = hosts[host]; |
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32 if node and host and host.type == "local" then |
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33 handle_inbound_presence_subscriptions_and_probes(origin, stanza, jid_bare(stanza.attr.from), jid_bare(stanza.attr.to), core_route_stanza); |
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34 return; |
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35 end |
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36 end |
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37 _core_route_stanza(origin, stanza); |
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38 end |
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39 |
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40 local function select_top_resources(user) |
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41 local priority = 0; |
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42 local recipients = {}; |
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43 for _, session in pairs(user.sessions) do -- find resource with greatest priority |
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44 if session.presence then |
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45 -- TODO check active privacy list for session |
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46 local p = session.priority; |
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47 if p > priority then |
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48 priority = p; |
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49 recipients = {session}; |
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50 elseif p == priority then |
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51 t_insert(recipients, session); |
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52 end |
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53 end |
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54 end |
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55 return recipients; |
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56 end |
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57 local function recalc_resource_map(origin) |
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58 local user = hosts[origin.host].sessions[origin.username]; |
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59 user.top_resources = select_top_resources(user); |
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60 if #user.top_resources == 0 then user.top_resources = nil; end |
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61 end |
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62 |
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63 function handle_normal_presence(origin, stanza, core_route_stanza) |
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64 local roster = origin.roster; |
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65 local node, host = origin.username, origin.host; |
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66 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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67 if res ~= origin and res.presence then -- to resource |
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68 stanza.attr.to = res.full_jid; |
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69 core_route_stanza(origin, stanza); |
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70 end |
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71 end |
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72 for jid, item in pairs(roster) do -- broadcast to all interested contacts |
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73 if item.subscription == "both" or item.subscription == "from" then |
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74 stanza.attr.to = jid; |
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75 core_route_stanza(origin, stanza); |
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76 end |
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77 end |
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78 if stanza.attr.type == nil and not origin.presence then -- initial presence |
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79 local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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80 for jid, item in pairs(roster) do -- probe all contacts we are subscribed to |
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81 if item.subscription == "both" or item.subscription == "to" then |
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82 probe.attr.to = jid; |
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83 core_route_stanza(origin, probe); |
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84 end |
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85 end |
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86 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources |
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87 if res ~= origin and res.presence then |
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88 res.presence.attr.to = origin.full_jid; |
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89 core_route_stanza(res, res.presence); |
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90 res.presence.attr.to = nil; |
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91 end |
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92 end |
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93 if roster.pending then -- resend incoming subscription requests |
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94 for jid in pairs(roster.pending) do |
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95 origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original? |
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96 end |
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97 end |
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98 local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host}); |
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99 for jid, item in pairs(roster) do -- resend outgoing subscription requests |
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100 if item.ask then |
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101 request.attr.to = jid; |
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102 core_route_stanza(origin, request); |
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103 end |
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104 end |
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105 local offline = offlinemanager.load(node, host); |
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106 if offline then |
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107 for _, msg in ipairs(offline) do |
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108 origin.send(msg); -- FIXME do we need to modify to/from in any way? |
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109 end |
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110 offlinemanager.deleteAll(node, host); |
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111 end |
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112 end |
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113 if stanza.attr.type == "unavailable" then |
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114 origin.presence = nil; |
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115 if origin.priority then |
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116 origin.priority = nil; |
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117 recalc_resource_map(origin); |
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118 end |
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119 if origin.directed then |
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120 for jid in pairs(origin.directed) do |
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121 stanza.attr.to = jid; |
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122 core_route_stanza(origin, stanza); |
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123 end |
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124 origin.directed = nil; |
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125 end |
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126 else |
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127 origin.presence = stanza; |
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128 local priority = stanza:child_with_name("priority"); |
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129 if priority and #priority > 0 then |
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130 priority = t_concat(priority); |
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131 if s_find(priority, "^[+-]?[0-9]+$") then |
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132 priority = tonumber(priority); |
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133 if priority < -128 then priority = -128 end |
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134 if priority > 127 then priority = 127 end |
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135 else priority = 0; end |
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136 else priority = 0; end |
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137 if origin.priority ~= priority then |
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138 origin.priority = priority; |
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139 recalc_resource_map(origin); |
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140 end |
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141 end |
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142 stanza.attr.to = nil; -- reset it |
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143 end |
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144 |
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145 function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza, stanza) |
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146 local h = hosts[host]; |
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147 local count = 0; |
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148 if h and h.type == "local" then |
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149 local u = h.sessions[user]; |
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150 if u then |
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151 for k, session in pairs(u.sessions) do |
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152 local pres = session.presence; |
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153 if pres then |
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154 if stanza then pres = stanza; pres.attr.from = session.full_jid; end |
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155 pres.attr.to = jid; |
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156 core_route_stanza(session, pres); |
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157 pres.attr.to = nil; |
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158 count = count + 1; |
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159 end |
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160 end |
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161 end |
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162 end |
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163 log("debug", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid); |
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164 return count; |
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165 end |
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166 |
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167 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) |
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168 local node, host = jid_split(from_bare); |
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169 if to_bare == origin.username.."@"..origin.host then return; end -- No self contacts |
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170 local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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171 stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
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172 log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); |
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173 if stanza.attr.type == "subscribe" then |
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174 -- 1. route stanza |
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175 -- 2. roster push (subscription = none, ask = subscribe) |
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176 if rostermanager.set_contact_pending_out(node, host, to_bare) then |
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177 rostermanager.roster_push(node, host, to_bare); |
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178 end -- else file error |
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179 core_route_stanza(origin, stanza); |
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180 elseif stanza.attr.type == "unsubscribe" then |
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181 -- 1. route stanza |
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182 -- 2. roster push (subscription = none or from) |
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183 if rostermanager.unsubscribe(node, host, to_bare) then |
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184 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? |
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185 end -- else file error |
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186 core_route_stanza(origin, stanza); |
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187 elseif stanza.attr.type == "subscribed" then |
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188 -- 1. route stanza |
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189 -- 2. roster_push () |
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190 -- 3. send_presence_of_available_resources |
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191 if rostermanager.subscribed(node, host, to_bare) then |
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192 rostermanager.roster_push(node, host, to_bare); |
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193 end |
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194 core_route_stanza(origin, stanza); |
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195 send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza); |
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196 elseif stanza.attr.type == "unsubscribed" then |
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197 -- 1. route stanza |
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198 -- 2. roster push (subscription = none or to) |
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199 if rostermanager.unsubscribed(node, host, to_bare) then |
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200 rostermanager.roster_push(node, host, to_bare); |
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201 end |
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202 core_route_stanza(origin, stanza); |
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203 -- COMPAT: Some legacy clients keep displaying unsubscribed contacts as online unless an unavailable presence is sent: |
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204 send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza, |
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205 st.presence({ type="unavailable", from=from_bare, to=to_bare, id=stanza.attr.id })); |
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206 end |
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207 stanza.attr.from, stanza.attr.to = st_from, st_to; |
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208 end |
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209 |
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210 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) |
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211 local node, host = jid_split(to_bare); |
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212 local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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213 stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
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214 log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); |
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215 |
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216 if not node then |
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217 log("debug", "dropping presence sent to host or invalid address '%s'", tostring(to_bare)); |
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218 end |
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219 |
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220 if stanza.attr.type == "probe" then |
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221 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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222 if 0 == send_presence_of_available_resources(node, host, st_from, origin, core_route_stanza) then |
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223 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) |
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224 end |
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225 else |
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226 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); |
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227 end |
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228 elseif stanza.attr.type == "subscribe" then |
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229 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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230 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed |
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231 -- Sending presence is not clearly stated in the RFC, but it seems appropriate |
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232 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then |
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233 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) |
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234 end |
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235 else |
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236 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unavailable"})); -- acknowledging receipt |
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237 if not rostermanager.is_contact_pending_in(node, host, from_bare) then |
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238 if rostermanager.set_contact_pending_in(node, host, from_bare) then |
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239 sessionmanager.send_to_available_resources(node, host, stanza); |
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240 end -- TODO else return error, unable to save |
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241 end |
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242 end |
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243 elseif stanza.attr.type == "unsubscribe" then |
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244 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then |
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245 sessionmanager.send_to_interested_resources(node, host, stanza); |
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246 rostermanager.roster_push(node, host, from_bare); |
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247 end |
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248 elseif stanza.attr.type == "subscribed" then |
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249 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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250 sessionmanager.send_to_interested_resources(node, host, stanza); |
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251 rostermanager.roster_push(node, host, from_bare); |
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252 end |
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253 elseif stanza.attr.type == "unsubscribed" then |
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254 if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then |
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255 sessionmanager.send_to_interested_resources(node, host, stanza); |
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256 rostermanager.roster_push(node, host, from_bare); |
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257 end |
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258 end -- discard any other type |
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259 stanza.attr.from, stanza.attr.to = st_from, st_to; |
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260 end |
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261 |
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262 local outbound_presence_handler = function(data) |
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263 -- outbound presence recieved |
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264 local origin, stanza = data.origin, data.stanza; |
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265 |
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266 local to = stanza.attr.to; |
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267 if to then |
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268 local t = stanza.attr.type; |
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269 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes |
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270 handle_outbound_presence_subscriptions_and_probes(origin, stanza, jid_bare(stanza.attr.from), jid_bare(stanza.attr.to), core_route_stanza); |
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271 return true; |
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272 end |
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273 |
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274 local to_bare = jid_bare(to); |
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275 if not(origin.roster[to_bare] and (origin.roster[to_bare].subscription == "both" or origin.roster[to_bare].subscription == "from")) then -- directed presence |
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276 origin.directed = origin.directed or {}; |
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277 if t then -- removing from directed presence list on sending an error or unavailable |
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278 origin.directed[to] = nil; -- FIXME does it make more sense to add to_bare rather than to? |
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279 else |
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280 origin.directed[to] = true; -- FIXME does it make more sense to add to_bare rather than to? |
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281 end |
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282 end |
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283 end -- TODO maybe handle normal presence here, instead of letting it pass to incoming handlers? |
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284 end |
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285 |
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286 module:hook("pre-presence/full", outbound_presence_handler); |
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287 module:hook("pre-presence/bare", outbound_presence_handler); |
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288 module:hook("pre-presence/host", outbound_presence_handler); |
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289 |
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290 module:hook("presence/bare", function(data) |
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291 -- inbound presence to bare JID recieved |
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292 local origin, stanza = data.origin, data.stanza; |
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293 |
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294 local to = stanza.attr.to; |
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295 local t = stanza.attr.type; |
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296 if to then |
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297 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to bare JID |
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298 handle_inbound_presence_subscriptions_and_probes(origin, stanza, jid_bare(stanza.attr.from), jid_bare(stanza.attr.to), core_route_stanza); |
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299 return true; |
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300 end |
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301 |
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302 local user = bare_sessions[to]; |
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303 if user then |
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304 for _, session in pairs(user.sessions) do |
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305 if session.presence then -- only send to available resources |
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306 session.send(stanza); |
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307 end |
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308 end |
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309 end -- no resources not online, discard |
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310 elseif not t or t == "unavailable" then |
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311 handle_normal_presence(origin, stanza, core_route_stanza); |
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312 end |
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313 return true; |
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314 end); |
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315 module:hook("presence/full", function(data) |
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316 -- inbound presence to full JID recieved |
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317 local origin, stanza = data.origin, data.stanza; |
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318 |
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319 local t = stanza.attr.type; |
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320 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to full JID |
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321 handle_inbound_presence_subscriptions_and_probes(origin, stanza, jid_bare(stanza.attr.from), jid_bare(stanza.attr.to), core_route_stanza); |
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322 return true; |
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323 end |
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324 |
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325 local session = full_sessions[stanza.attr.to]; |
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326 if session then |
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327 -- TODO fire post processing event |
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328 session.send(stanza); |
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329 end -- resource not online, discard |
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330 return true; |
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331 end); |
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332 |
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333 module:hook("resource-unbind", function(event) |
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334 local session, err = event.session, event.error; |
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335 -- Send unavailable presence |
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336 if session.presence then |
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337 local pres = st.presence{ type = "unavailable" }; |
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338 if not(err) or err == "closed" then err = "connection closed"; end |
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339 pres:tag("status"):text("Disconnected: "..err):up(); |
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340 session:dispatch_stanza(pres); |
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341 elseif session.directed then |
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342 local pres = st.presence{ type = "unavailable", from = session.full_jid }; |
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343 if not(err) or err == "closed" then err = "connection closed"; end |
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344 pres:tag("status"):text("Disconnected: "..err):up(); |
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345 for jid in pairs(session.directed) do |
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346 pres.attr.to = jid; |
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347 core_route_stanza(session, pres); |
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348 end |
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349 session.directed = nil; |
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350 end |
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351 end); |