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plugins/mod_presence.lua @ 2923:b7049746bd29
Update copyright headers for 2010
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 22 Mar 2010 17:06:15 +0000 |
parent | 2863:b5924a017849 |
child | 2925:692b3c6c5bd2 |
rev | line source |
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2010 Matthew Wild |
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3 -- Copyright (C) 2008-2010 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 local NULL = {}; |
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22 |
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23 local rostermanager = require "core.rostermanager"; |
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24 local sessionmanager = require "core.sessionmanager"; |
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25 local offlinemanager = require "core.offlinemanager"; |
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26 |
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27 local _core_route_stanza = core_route_stanza; |
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28 local core_route_stanza; |
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29 function core_route_stanza(origin, stanza) |
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30 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then |
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31 local node, host = jid_split(stanza.attr.to); |
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32 host = hosts[host]; |
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33 if node and host and host.type == "local" then |
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34 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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35 return; |
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36 end |
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37 end |
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38 _core_route_stanza(origin, stanza); |
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39 end |
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40 |
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41 local function select_top_resources(user) |
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42 local priority = 0; |
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43 local recipients = {}; |
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44 for _, session in pairs(user.sessions) do -- find resource with greatest priority |
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45 if session.presence then |
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46 -- TODO check active privacy list for session |
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47 local p = session.priority; |
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48 if p > priority then |
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49 priority = p; |
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50 recipients = {session}; |
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51 elseif p == priority then |
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52 t_insert(recipients, session); |
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53 end |
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54 end |
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55 end |
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56 return recipients; |
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57 end |
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58 local function recalc_resource_map(user) |
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59 if user then |
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60 user.top_resources = select_top_resources(user); |
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61 if #user.top_resources == 0 then user.top_resources = nil; end |
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62 end |
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63 end |
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64 |
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65 function handle_normal_presence(origin, stanza, core_route_stanza) |
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66 if full_sessions[origin.full_jid] then -- if user is still connected |
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67 origin.send(stanza); -- reflect their presence back to them |
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68 end |
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69 local roster = origin.roster; |
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70 local node, host = origin.username, origin.host; |
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71 local user = bare_sessions[node.."@"..host]; |
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72 for _, res in pairs(user and user.sessions or NULL) do -- broadcast to all resources |
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73 if res ~= origin and res.presence then -- to resource |
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74 stanza.attr.to = res.full_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 for jid, item in pairs(roster) do -- broadcast to all interested contacts |
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79 if item.subscription == "both" or item.subscription == "from" then |
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80 stanza.attr.to = jid; |
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81 core_route_stanza(origin, stanza); |
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82 end |
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83 end |
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84 if stanza.attr.type == nil and not origin.presence then -- initial presence |
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85 origin.presence = stanza; -- FIXME repeated later |
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86 local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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87 for jid, item in pairs(roster) do -- probe all contacts we are subscribed to |
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88 if item.subscription == "both" or item.subscription == "to" then |
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89 probe.attr.to = jid; |
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90 core_route_stanza(origin, probe); |
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91 end |
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92 end |
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93 for _, res in pairs(user and user.sessions or NULL) do -- broadcast from all available resources |
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94 if res ~= origin and res.presence then |
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95 res.presence.attr.to = origin.full_jid; |
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96 core_route_stanza(res, res.presence); |
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97 res.presence.attr.to = nil; |
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98 end |
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99 end |
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100 if roster.pending then -- resend incoming subscription requests |
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101 for jid in pairs(roster.pending) do |
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102 origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original? |
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103 end |
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104 end |
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105 local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host}); |
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106 for jid, item in pairs(roster) do -- resend outgoing subscription requests |
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107 if item.ask then |
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108 request.attr.to = jid; |
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109 core_route_stanza(origin, request); |
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110 end |
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111 end |
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112 local offline = offlinemanager.load(node, host); |
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113 if offline then |
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114 for _, msg in ipairs(offline) do |
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115 origin.send(msg); -- FIXME do we need to modify to/from in any way? |
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116 end |
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117 offlinemanager.deleteAll(node, host); |
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118 end |
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119 end |
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120 if stanza.attr.type == "unavailable" then |
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121 origin.presence = nil; |
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122 if origin.priority then |
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123 origin.priority = nil; |
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124 recalc_resource_map(user); |
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125 end |
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126 if origin.directed then |
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127 for jid in pairs(origin.directed) do |
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128 stanza.attr.to = jid; |
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129 core_route_stanza(origin, stanza); |
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130 end |
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131 origin.directed = nil; |
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132 end |
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133 else |
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134 origin.presence = stanza; |
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135 local priority = stanza:child_with_name("priority"); |
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136 if priority and #priority > 0 then |
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137 priority = t_concat(priority); |
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138 if s_find(priority, "^[+-]?[0-9]+$") then |
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139 priority = tonumber(priority); |
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140 if priority < -128 then priority = -128 end |
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141 if priority > 127 then priority = 127 end |
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142 else priority = 0; end |
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143 else priority = 0; end |
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144 if origin.priority ~= priority then |
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145 origin.priority = priority; |
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146 recalc_resource_map(user); |
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147 end |
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148 end |
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149 stanza.attr.to = nil; -- reset it |
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150 end |
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151 |
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152 function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza, stanza) |
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153 local h = hosts[host]; |
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154 local count = 0; |
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155 if h and h.type == "local" then |
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156 local u = h.sessions[user]; |
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157 if u then |
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158 for k, session in pairs(u.sessions) do |
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159 local pres = session.presence; |
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160 if pres then |
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161 if stanza then pres = stanza; pres.attr.from = session.full_jid; end |
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162 pres.attr.to = jid; |
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163 core_route_stanza(session, pres); |
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164 pres.attr.to = nil; |
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165 count = count + 1; |
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166 end |
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167 end |
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168 end |
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169 end |
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170 log("debug", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid); |
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171 return count; |
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172 end |
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173 |
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174 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) |
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175 local node, host = jid_split(from_bare); |
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176 if to_bare == origin.username.."@"..origin.host then return; end -- No self contacts |
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177 local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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178 stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
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179 log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); |
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180 if stanza.attr.type == "subscribe" then |
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181 -- 1. route stanza |
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182 -- 2. roster push (subscription = none, ask = subscribe) |
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183 if rostermanager.set_contact_pending_out(node, host, to_bare) then |
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184 rostermanager.roster_push(node, host, to_bare); |
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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 == "unsubscribe" then |
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188 -- 1. route stanza |
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189 -- 2. roster push (subscription = none or from) |
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190 if rostermanager.unsubscribe(node, host, to_bare) then |
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191 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? |
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192 end -- else file error |
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193 core_route_stanza(origin, stanza); |
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194 elseif stanza.attr.type == "subscribed" then |
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195 -- 1. route stanza |
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196 -- 2. roster_push () |
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197 -- 3. send_presence_of_available_resources |
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198 if rostermanager.subscribed(node, host, to_bare) then |
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199 rostermanager.roster_push(node, host, to_bare); |
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200 end |
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201 core_route_stanza(origin, stanza); |
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202 send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza); |
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203 elseif stanza.attr.type == "unsubscribed" then |
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204 -- 1. route stanza |
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205 -- 2. roster push (subscription = none or to) |
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206 if rostermanager.unsubscribed(node, host, to_bare) then |
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207 rostermanager.roster_push(node, host, to_bare); |
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208 end |
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209 core_route_stanza(origin, stanza); |
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210 end |
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211 stanza.attr.from, stanza.attr.to = st_from, st_to; |
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212 end |
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213 |
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214 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) |
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215 local node, host = jid_split(to_bare); |
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216 local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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217 stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
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218 log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); |
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219 |
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220 if not node then |
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221 log("debug", "dropping presence sent to host or invalid address '%s'", tostring(to_bare)); |
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222 end |
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223 |
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224 if stanza.attr.type == "probe" then |
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225 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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226 if 0 == send_presence_of_available_resources(node, host, st_from, origin, core_route_stanza) then |
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227 core_route_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="unavailable"})); -- TODO send last activity |
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228 end |
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229 else |
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230 core_route_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); |
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231 end |
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232 elseif stanza.attr.type == "subscribe" then |
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233 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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234 core_route_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed |
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235 -- Sending presence is not clearly stated in the RFC, but it seems appropriate |
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236 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then |
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237 core_route_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="unavailable"})); -- TODO send last activity |
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238 end |
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239 else |
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240 core_route_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="unavailable"})); -- acknowledging receipt |
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241 if not rostermanager.is_contact_pending_in(node, host, from_bare) then |
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242 if rostermanager.set_contact_pending_in(node, host, from_bare) then |
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243 sessionmanager.send_to_available_resources(node, host, stanza); |
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244 end -- TODO else return error, unable to save |
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245 end |
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246 end |
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247 elseif stanza.attr.type == "unsubscribe" then |
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248 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then |
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249 sessionmanager.send_to_interested_resources(node, host, stanza); |
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250 rostermanager.roster_push(node, host, from_bare); |
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251 end |
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252 elseif stanza.attr.type == "subscribed" then |
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253 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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254 sessionmanager.send_to_interested_resources(node, host, stanza); |
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255 rostermanager.roster_push(node, host, from_bare); |
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256 end |
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257 elseif stanza.attr.type == "unsubscribed" then |
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258 if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then |
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259 sessionmanager.send_to_interested_resources(node, host, stanza); |
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260 rostermanager.roster_push(node, host, from_bare); |
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261 end |
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262 end -- discard any other type |
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263 stanza.attr.from, stanza.attr.to = st_from, st_to; |
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264 end |
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265 |
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266 local outbound_presence_handler = function(data) |
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267 -- outbound presence recieved |
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268 local origin, stanza = data.origin, data.stanza; |
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269 |
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270 local to = stanza.attr.to; |
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271 if to then |
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272 local t = stanza.attr.type; |
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273 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes |
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274 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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275 return true; |
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276 end |
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277 |
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278 local to_bare = jid_bare(to); |
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279 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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280 origin.directed = origin.directed or {}; |
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281 if t then -- removing from directed presence list on sending an error or unavailable |
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282 origin.directed[to] = nil; -- FIXME does it make more sense to add to_bare rather than to? |
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283 else |
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284 origin.directed[to] = true; -- FIXME does it make more sense to add to_bare rather than to? |
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285 end |
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286 end |
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287 end -- TODO maybe handle normal presence here, instead of letting it pass to incoming handlers? |
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288 end |
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289 |
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290 module:hook("pre-presence/full", outbound_presence_handler); |
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291 module:hook("pre-presence/bare", outbound_presence_handler); |
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292 module:hook("pre-presence/host", outbound_presence_handler); |
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293 |
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294 module:hook("presence/bare", function(data) |
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295 -- inbound presence to bare JID recieved |
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296 local origin, stanza = data.origin, data.stanza; |
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297 |
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298 local to = stanza.attr.to; |
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299 local t = stanza.attr.type; |
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300 if to then |
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301 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to bare JID |
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302 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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303 return true; |
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304 end |
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305 |
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306 local user = bare_sessions[to]; |
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307 if user then |
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308 for _, session in pairs(user.sessions) do |
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309 if session.presence then -- only send to available resources |
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310 session.send(stanza); |
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311 end |
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312 end |
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313 end -- no resources not online, discard |
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314 elseif not t or t == "unavailable" then |
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315 handle_normal_presence(origin, stanza, core_route_stanza); |
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316 end |
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317 return true; |
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318 end); |
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319 module:hook("presence/full", function(data) |
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320 -- inbound presence to full JID recieved |
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321 local origin, stanza = data.origin, data.stanza; |
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322 |
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323 local t = stanza.attr.type; |
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324 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to full JID |
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325 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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326 return true; |
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327 end |
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328 |
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329 local session = full_sessions[stanza.attr.to]; |
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330 if session then |
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331 -- TODO fire post processing event |
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332 session.send(stanza); |
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333 end -- resource not online, discard |
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334 return true; |
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335 end); |
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336 module:hook("presence/host", function(data) |
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337 -- inbound presence to the host |
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338 local origin, stanza = data.origin, data.stanza; |
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339 |
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340 local from_bare = jid_bare(stanza.attr.from); |
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341 local t = stanza.attr.type; |
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342 if t == "probe" then |
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343 core_route_stanza(hosts[module.host], st.presence({ from = module.host, to = from_bare, id = stanza.attr.id })); |
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344 elseif t == "subscribe" then |
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345 core_route_stanza(hosts[module.host], st.presence({ from = module.host, to = from_bare, id = stanza.attr.id, type = "subscribed" })); |
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346 core_route_stanza(hosts[module.host], st.presence({ from = module.host, to = from_bare, id = stanza.attr.id })); |
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347 end |
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348 return true; |
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349 end); |
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350 |
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351 module:hook("resource-unbind", function(event) |
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352 local session, err = event.session, event.error; |
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353 -- Send unavailable presence |
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354 if session.presence then |
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355 local pres = st.presence{ type = "unavailable" }; |
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356 if not(err) or err == "closed" then err = "connection closed"; end |
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357 pres:tag("status"):text("Disconnected: "..err):up(); |
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358 session:dispatch_stanza(pres); |
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359 elseif session.directed then |
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360 local pres = st.presence{ type = "unavailable", from = session.full_jid }; |
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361 if not(err) or err == "closed" then err = "connection closed"; end |
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362 pres:tag("status"):text("Disconnected: "..err):up(); |
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363 for jid in pairs(session.directed) do |
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364 pres.attr.to = jid; |
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365 core_route_stanza(session, pres); |
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366 end |
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367 session.directed = nil; |
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368 end |
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369 end); |