Software / code / prosody
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plugins/mod_presence.lua @ 1470:af4b918e3432
mod_presence: Declare t_insert, fixes a potential traceback
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Fri, 03 Jul 2009 21:44:30 +0100 |
| parent | 1463:4ad920999cfa |
| child | 1472:9b13cea9fa3e |
| rev | line source |
|---|---|
| 1009 | 1 -- Prosody IM v0.4 |
| 2 -- Copyright (C) 2008-2009 Matthew Wild | |
| 3 -- Copyright (C) 2008-2009 Waqas Hussain | |
| 4 -- | |
| 5 -- This project is MIT/X11 licensed. Please see the | |
| 6 -- COPYING file in the source package for more information. | |
| 7 -- | |
| 8 | |
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9 local log = module._log; |
| 1009 | 10 |
| 11 local require = require; | |
| 12 local pairs, ipairs = pairs, ipairs; | |
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13 local t_concat, t_insert = table.concat, table.insert; |
| 1009 | 14 local s_find = string.find; |
| 15 local tonumber = tonumber; | |
| 16 | |
| 17 local st = require "util.stanza"; | |
| 18 local jid_split = require "util.jid".split; | |
| 19 local jid_bare = require "util.jid".bare; | |
| 20 local hosts = hosts; | |
| 21 | |
| 22 local rostermanager = require "core.rostermanager"; | |
| 23 local sessionmanager = require "core.sessionmanager"; | |
| 24 local offlinemanager = require "core.offlinemanager"; | |
| 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 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 |
| 1009 | 63 function handle_normal_presence(origin, stanza, core_route_stanza) |
| 64 if origin.roster then | |
| 65 for jid in pairs(origin.roster) do -- broadcast to all interested contacts | |
| 66 local subscription = origin.roster[jid].subscription; | |
| 67 if subscription == "both" or subscription == "from" then | |
| 68 stanza.attr.to = jid; | |
| 69 core_route_stanza(origin, stanza); | |
| 70 end | |
| 71 end | |
| 72 local node, host = jid_split(stanza.attr.from); | |
| 73 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources | |
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74 if res ~= origin and res.presence then -- to resource |
| 1009 | 75 stanza.attr.to = res.full_jid; |
| 76 core_route_stanza(origin, stanza); | |
| 77 end | |
| 78 end | |
| 79 if stanza.attr.type == nil and not origin.presence then -- initial presence | |
| 80 local probe = st.presence({from = origin.full_jid, type = "probe"}); | |
| 81 for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to | |
| 82 local subscription = origin.roster[jid].subscription; | |
| 83 if subscription == "both" or subscription == "to" then | |
| 84 probe.attr.to = jid; | |
| 85 core_route_stanza(origin, probe); | |
| 86 end | |
| 87 end | |
| 88 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources | |
| 89 if res ~= origin and res.presence then | |
| 90 res.presence.attr.to = origin.full_jid; | |
| 91 core_route_stanza(res, res.presence); | |
| 92 res.presence.attr.to = nil; | |
| 93 end | |
| 94 end | |
| 95 if origin.roster.pending then -- resend incoming subscription requests | |
| 96 for jid in pairs(origin.roster.pending) do | |
| 97 origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original? | |
| 98 end | |
| 99 end | |
| 100 local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host}); | |
| 101 for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests | |
| 102 if item.ask then | |
| 103 request.attr.to = jid; | |
| 104 core_route_stanza(origin, request); | |
| 105 end | |
| 106 end | |
| 107 local offline = offlinemanager.load(node, host); | |
| 108 if offline then | |
| 109 for _, msg in ipairs(offline) do | |
| 110 origin.send(msg); -- FIXME do we need to modify to/from in any way? | |
| 111 end | |
| 112 offlinemanager.deleteAll(node, host); | |
| 113 end | |
| 114 end | |
| 115 if stanza.attr.type == "unavailable" then | |
| 116 origin.presence = nil; | |
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117 if origin.priority then |
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118 origin.priority = nil; |
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119 recalc_resource_map(origin); |
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120 end |
| 1009 | 121 if origin.directed then |
| 122 local old_from = stanza.attr.from; | |
| 123 stanza.attr.from = origin.full_jid; | |
| 124 for jid in pairs(origin.directed) do | |
| 125 stanza.attr.to = jid; | |
| 126 core_route_stanza(origin, stanza); | |
| 127 end | |
| 128 stanza.attr.from = old_from; | |
| 129 origin.directed = nil; | |
| 130 end | |
| 131 else | |
| 132 origin.presence = stanza; | |
| 133 local priority = stanza:child_with_name("priority"); | |
| 134 if priority and #priority > 0 then | |
| 135 priority = t_concat(priority); | |
| 136 if s_find(priority, "^[+-]?[0-9]+$") then | |
| 137 priority = tonumber(priority); | |
| 138 if priority < -128 then priority = -128 end | |
| 139 if priority > 127 then priority = 127 end | |
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140 else priority = 0; end |
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141 else priority = 0; end |
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142 if origin.priority ~= priority then |
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143 origin.priority = priority; |
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144 recalc_resource_map(origin); |
| 1009 | 145 end |
| 146 end | |
| 147 stanza.attr.to = nil; -- reset it | |
| 148 else | |
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149 log("warn", "presence recieved from client with no roster"); |
| 1009 | 150 end |
| 151 end | |
| 152 | |
| 153 function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza) | |
| 154 local h = hosts[host]; | |
| 155 local count = 0; | |
| 156 if h and h.type == "local" then | |
| 157 local u = h.sessions[user]; | |
| 158 if u then | |
| 159 for k, session in pairs(u.sessions) do | |
| 160 local pres = session.presence; | |
| 161 if pres then | |
| 162 pres.attr.to = jid; | |
| 163 core_route_stanza(session, pres); | |
| 164 pres.attr.to = nil; | |
| 165 count = count + 1; | |
| 166 end | |
| 167 end | |
| 168 end | |
| 169 end | |
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170 log("debug", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid); |
| 1009 | 171 return count; |
| 172 end | |
| 173 | |
| 174 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) | |
| 175 local node, host = jid_split(from_bare); | |
| 176 local st_from, st_to = stanza.attr.from, stanza.attr.to; | |
| 177 stanza.attr.from, stanza.attr.to = from_bare, to_bare; | |
| 178 log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); | |
| 179 if stanza.attr.type == "subscribe" then | |
| 180 -- 1. route stanza | |
| 181 -- 2. roster push (subscription = none, ask = subscribe) | |
| 182 if rostermanager.set_contact_pending_out(node, host, to_bare) then | |
| 183 rostermanager.roster_push(node, host, to_bare); | |
| 184 end -- else file error | |
| 185 core_route_stanza(origin, stanza); | |
| 186 elseif stanza.attr.type == "unsubscribe" then | |
| 187 -- 1. route stanza | |
| 188 -- 2. roster push (subscription = none or from) | |
| 189 if rostermanager.unsubscribe(node, host, to_bare) then | |
| 190 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? | |
| 191 end -- else file error | |
| 192 core_route_stanza(origin, stanza); | |
| 193 elseif stanza.attr.type == "subscribed" then | |
| 194 -- 1. route stanza | |
| 195 -- 2. roster_push () | |
| 196 -- 3. send_presence_of_available_resources | |
| 197 if rostermanager.subscribed(node, host, to_bare) then | |
| 198 rostermanager.roster_push(node, host, to_bare); | |
| 199 end | |
| 200 core_route_stanza(origin, stanza); | |
| 201 send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza); | |
| 202 elseif stanza.attr.type == "unsubscribed" then | |
| 203 -- 1. route stanza | |
| 204 -- 2. roster push (subscription = none or to) | |
| 205 if rostermanager.unsubscribed(node, host, to_bare) then | |
| 206 rostermanager.roster_push(node, host, to_bare); | |
| 207 end | |
| 208 core_route_stanza(origin, stanza); | |
| 209 end | |
| 210 stanza.attr.from, stanza.attr.to = st_from, st_to; | |
| 211 end | |
| 212 | |
| 213 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) | |
| 214 local node, host = jid_split(to_bare); | |
| 215 local st_from, st_to = stanza.attr.from, stanza.attr.to; | |
| 216 stanza.attr.from, stanza.attr.to = from_bare, to_bare; | |
| 217 log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); | |
| 218 if stanza.attr.type == "probe" then | |
| 219 if rostermanager.is_contact_subscribed(node, host, from_bare) then | |
| 220 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then | |
| 221 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) | |
| 222 end | |
| 223 else | |
| 224 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); | |
| 225 end | |
| 226 elseif stanza.attr.type == "subscribe" then | |
| 227 if rostermanager.is_contact_subscribed(node, host, from_bare) then | |
| 228 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed | |
| 229 -- Sending presence is not clearly stated in the RFC, but it seems appropriate | |
| 230 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then | |
| 231 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) | |
| 232 end | |
| 233 else | |
| 234 if not rostermanager.is_contact_pending_in(node, host, from_bare) then | |
| 235 if rostermanager.set_contact_pending_in(node, host, from_bare) then | |
| 236 sessionmanager.send_to_available_resources(node, host, stanza); | |
| 237 end -- TODO else return error, unable to save | |
| 238 end | |
| 239 end | |
| 240 elseif stanza.attr.type == "unsubscribe" then | |
| 241 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then | |
| 242 rostermanager.roster_push(node, host, from_bare); | |
| 243 end | |
| 244 elseif stanza.attr.type == "subscribed" then | |
| 245 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then | |
| 246 rostermanager.roster_push(node, host, from_bare); | |
| 247 end | |
| 248 elseif stanza.attr.type == "unsubscribed" then | |
| 249 if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then | |
| 250 rostermanager.roster_push(node, host, from_bare); | |
| 251 end | |
| 252 end -- discard any other type | |
| 253 stanza.attr.from, stanza.attr.to = st_from, st_to; | |
| 254 end | |
| 255 | |
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256 local outbound_presence_handler = function(data) |
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257 -- outbound presence recieved |
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258 local origin, stanza = data.origin, data.stanza; |
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259 |
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260 local to = stanza.attr.to; |
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261 if to then |
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262 local t = stanza.attr.type; |
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263 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes |
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264 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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265 return true; |
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266 end |
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267 |
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268 local to_bare = jid_bare(to); |
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269 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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270 origin.directed = origin.directed or {}; |
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271 if t then -- removing from directed presence list on sending an error or unavailable |
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272 origin.directed[to] = nil; -- FIXME does it make more sense to add to_bare rather than to? |
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273 else |
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274 origin.directed[to] = true; -- FIXME does it make more sense to add to_bare rather than to? |
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275 end |
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276 end |
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277 end -- TODO maybe handle normal presence here, instead of letting it pass to incoming handlers? |
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278 end |
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279 |
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280 module:hook("pre-presence/full", outbound_presence_handler); |
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281 module:hook("pre-presence/bare", outbound_presence_handler); |
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282 module:hook("pre-presence/host", outbound_presence_handler); |
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283 |
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284 module:hook("presence/bare", function(data) |
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285 -- inbound presence to bare JID recieved |
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286 local origin, stanza = data.origin, data.stanza; |
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287 |
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288 local to = stanza.attr.to; |
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289 local t = stanza.attr.type; |
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290 if to then |
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291 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to bare JID |
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292 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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293 return true; |
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294 end |
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295 |
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296 local user = bare_sessions[to]; |
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297 if user then |
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298 for _, session in pairs(user.sessions) do |
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299 if session.presence then -- only send to available resources |
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300 session.send(stanza); |
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301 end |
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302 end |
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303 end -- no resources not online, discard |
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304 elseif not t or t == "unavailable" then |
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305 handle_normal_presence(origin, stanza, core_route_stanza); |
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306 end |
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307 return true; |
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308 end); |
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309 module:hook("presence/full", function(data) |
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310 -- inbound presence to full JID recieved |
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311 local origin, stanza = data.origin, data.stanza; |
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312 |
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313 local t = stanza.attr.type; |
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314 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to full JID |
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315 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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316 return true; |
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317 end |
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318 |
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319 local session = full_sessions[stanza.attr.to]; |
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320 if session then |
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321 -- TODO fire post processing event |
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322 session.send(stanza); |
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323 end -- resource not online, discard |
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324 return true; |
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325 end); |
