Software / code / prosody
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plugins/mod_presence.lua @ 1285:0a6e2d6ae459
mod_presence: Check for nil 'to' attribute in all cases for incoming stanzas
| author | Waqas Hussain <waqas20@gmail.com> |
|---|---|
| date | Tue, 02 Jun 2009 20:07:22 +0500 |
| parent | 1284:c0fb8379696e |
| child | 1286:a9b1675ad16e |
| 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; | |
| 13 local t_concat = table.concat; | |
| 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 |
| 1009 | 40 function handle_presence(origin, stanza, from_bare, to_bare, core_route_stanza, inbound) |
| 41 local type = stanza.attr.type; | |
| 42 if type and type ~= "unavailable" and type ~= "error" then | |
| 43 if inbound then | |
| 44 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza); | |
| 45 else | |
| 46 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza); | |
| 47 end | |
| 48 elseif not inbound and not stanza.attr.to then | |
| 49 handle_normal_presence(origin, stanza, core_route_stanza); | |
| 50 else | |
| 51 core_route_stanza(origin, stanza); | |
| 52 end | |
| 53 end | |
| 54 | |
| 55 function handle_normal_presence(origin, stanza, core_route_stanza) | |
| 56 if origin.roster then | |
| 57 for jid in pairs(origin.roster) do -- broadcast to all interested contacts | |
| 58 local subscription = origin.roster[jid].subscription; | |
| 59 if subscription == "both" or subscription == "from" then | |
| 60 stanza.attr.to = jid; | |
| 61 core_route_stanza(origin, stanza); | |
| 62 end | |
| 63 end | |
| 64 local node, host = jid_split(stanza.attr.from); | |
| 65 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources | |
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66 if res ~= origin and res.presence then -- to resource |
| 1009 | 67 stanza.attr.to = res.full_jid; |
| 68 core_route_stanza(origin, stanza); | |
| 69 end | |
| 70 end | |
| 71 if stanza.attr.type == nil and not origin.presence then -- initial presence | |
| 72 local probe = st.presence({from = origin.full_jid, type = "probe"}); | |
| 73 for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to | |
| 74 local subscription = origin.roster[jid].subscription; | |
| 75 if subscription == "both" or subscription == "to" then | |
| 76 probe.attr.to = jid; | |
| 77 core_route_stanza(origin, probe); | |
| 78 end | |
| 79 end | |
| 80 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources | |
| 81 if res ~= origin and res.presence then | |
| 82 res.presence.attr.to = origin.full_jid; | |
| 83 core_route_stanza(res, res.presence); | |
| 84 res.presence.attr.to = nil; | |
| 85 end | |
| 86 end | |
| 87 if origin.roster.pending then -- resend incoming subscription requests | |
| 88 for jid in pairs(origin.roster.pending) do | |
| 89 origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original? | |
| 90 end | |
| 91 end | |
| 92 local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host}); | |
| 93 for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests | |
| 94 if item.ask then | |
| 95 request.attr.to = jid; | |
| 96 core_route_stanza(origin, request); | |
| 97 end | |
| 98 end | |
| 99 local offline = offlinemanager.load(node, host); | |
| 100 if offline then | |
| 101 for _, msg in ipairs(offline) do | |
| 102 origin.send(msg); -- FIXME do we need to modify to/from in any way? | |
| 103 end | |
| 104 offlinemanager.deleteAll(node, host); | |
| 105 end | |
| 106 end | |
| 107 origin.priority = 0; | |
| 108 if stanza.attr.type == "unavailable" then | |
| 109 origin.presence = nil; | |
| 110 if origin.directed then | |
| 111 local old_from = stanza.attr.from; | |
| 112 stanza.attr.from = origin.full_jid; | |
| 113 for jid in pairs(origin.directed) do | |
| 114 stanza.attr.to = jid; | |
| 115 core_route_stanza(origin, stanza); | |
| 116 end | |
| 117 stanza.attr.from = old_from; | |
| 118 origin.directed = nil; | |
| 119 end | |
| 120 else | |
| 121 origin.presence = stanza; | |
| 122 local priority = stanza:child_with_name("priority"); | |
| 123 if priority and #priority > 0 then | |
| 124 priority = t_concat(priority); | |
| 125 if s_find(priority, "^[+-]?[0-9]+$") then | |
| 126 priority = tonumber(priority); | |
| 127 if priority < -128 then priority = -128 end | |
| 128 if priority > 127 then priority = 127 end | |
| 129 origin.priority = priority; | |
| 130 end | |
| 131 end | |
| 132 end | |
| 133 stanza.attr.to = nil; -- reset it | |
| 134 else | |
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135 log("warn", "presence recieved from client with no roster"); |
| 1009 | 136 end |
| 137 end | |
| 138 | |
| 139 function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza) | |
| 140 local h = hosts[host]; | |
| 141 local count = 0; | |
| 142 if h and h.type == "local" then | |
| 143 local u = h.sessions[user]; | |
| 144 if u then | |
| 145 for k, session in pairs(u.sessions) do | |
| 146 local pres = session.presence; | |
| 147 if pres then | |
| 148 pres.attr.to = jid; | |
| 149 core_route_stanza(session, pres); | |
| 150 pres.attr.to = nil; | |
| 151 count = count + 1; | |
| 152 end | |
| 153 end | |
| 154 end | |
| 155 end | |
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156 log("debug", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid); |
| 1009 | 157 return count; |
| 158 end | |
| 159 | |
| 160 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) | |
| 161 local node, host = jid_split(from_bare); | |
| 162 local st_from, st_to = stanza.attr.from, stanza.attr.to; | |
| 163 stanza.attr.from, stanza.attr.to = from_bare, to_bare; | |
| 164 log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); | |
| 165 if stanza.attr.type == "subscribe" then | |
| 166 -- 1. route stanza | |
| 167 -- 2. roster push (subscription = none, ask = subscribe) | |
| 168 if rostermanager.set_contact_pending_out(node, host, to_bare) then | |
| 169 rostermanager.roster_push(node, host, to_bare); | |
| 170 end -- else file error | |
| 171 core_route_stanza(origin, stanza); | |
| 172 elseif stanza.attr.type == "unsubscribe" then | |
| 173 -- 1. route stanza | |
| 174 -- 2. roster push (subscription = none or from) | |
| 175 if rostermanager.unsubscribe(node, host, to_bare) then | |
| 176 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? | |
| 177 end -- else file error | |
| 178 core_route_stanza(origin, stanza); | |
| 179 elseif stanza.attr.type == "subscribed" then | |
| 180 -- 1. route stanza | |
| 181 -- 2. roster_push () | |
| 182 -- 3. send_presence_of_available_resources | |
| 183 if rostermanager.subscribed(node, host, to_bare) then | |
| 184 rostermanager.roster_push(node, host, to_bare); | |
| 185 end | |
| 186 core_route_stanza(origin, stanza); | |
| 187 send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza); | |
| 188 elseif stanza.attr.type == "unsubscribed" then | |
| 189 -- 1. route stanza | |
| 190 -- 2. roster push (subscription = none or to) | |
| 191 if rostermanager.unsubscribed(node, host, to_bare) then | |
| 192 rostermanager.roster_push(node, host, to_bare); | |
| 193 end | |
| 194 core_route_stanza(origin, stanza); | |
| 195 end | |
| 196 stanza.attr.from, stanza.attr.to = st_from, st_to; | |
| 197 end | |
| 198 | |
| 199 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) | |
| 200 local node, host = jid_split(to_bare); | |
| 201 local st_from, st_to = stanza.attr.from, stanza.attr.to; | |
| 202 stanza.attr.from, stanza.attr.to = from_bare, to_bare; | |
| 203 log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); | |
| 204 if stanza.attr.type == "probe" then | |
| 205 if rostermanager.is_contact_subscribed(node, host, from_bare) then | |
| 206 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then | |
| 207 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) | |
| 208 end | |
| 209 else | |
| 210 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); | |
| 211 end | |
| 212 elseif stanza.attr.type == "subscribe" then | |
| 213 if rostermanager.is_contact_subscribed(node, host, from_bare) then | |
| 214 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed | |
| 215 -- Sending presence is not clearly stated in the RFC, but it seems appropriate | |
| 216 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then | |
| 217 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) | |
| 218 end | |
| 219 else | |
| 220 if not rostermanager.is_contact_pending_in(node, host, from_bare) then | |
| 221 if rostermanager.set_contact_pending_in(node, host, from_bare) then | |
| 222 sessionmanager.send_to_available_resources(node, host, stanza); | |
| 223 end -- TODO else return error, unable to save | |
| 224 end | |
| 225 end | |
| 226 elseif stanza.attr.type == "unsubscribe" then | |
| 227 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then | |
| 228 rostermanager.roster_push(node, host, from_bare); | |
| 229 end | |
| 230 elseif stanza.attr.type == "subscribed" then | |
| 231 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then | |
| 232 rostermanager.roster_push(node, host, from_bare); | |
| 233 end | |
| 234 elseif stanza.attr.type == "unsubscribed" then | |
| 235 if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then | |
| 236 rostermanager.roster_push(node, host, from_bare); | |
| 237 end | |
| 238 end -- discard any other type | |
| 239 stanza.attr.from, stanza.attr.to = st_from, st_to; | |
| 240 end | |
| 241 | |
| 242 local function presence_handler(data) | |
| 243 local origin, stanza = data.origin, data.stanza; | |
| 244 local to = stanza.attr.to; | |
| 245 local node, host = jid_split(to); | |
| 246 local to_bare = jid_bare(to); | |
| 247 local from_bare = jid_bare(stanza.attr.from); | |
| 248 if origin.type == "c2s" then | |
| 249 if to ~= nil and not(origin.roster[to_bare] and (origin.roster[to_bare].subscription == "both" or origin.roster[to_bare].subscription == "from")) then -- directed presence | |
| 250 origin.directed = origin.directed or {}; | |
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251 origin.directed[to] = true; -- FIXME does it make more sense to add to_bare rather than to? |
| 1009 | 252 end |
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253 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then |
| 1009 | 254 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza); |
| 255 elseif not to then | |
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256 handle_normal_presence(origin, stanza, core_route_stanza); |
| 1009 | 257 else |
| 258 core_route_stanza(origin, stanza); | |
| 259 end | |
| 260 elseif (origin.type == "s2sin" or origin.type == "component") and hosts[host] then | |
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261 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then |
| 1009 | 262 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza); |
| 263 else | |
| 264 core_route_stanza(origin, stanza); | |
| 265 end | |
| 266 end | |
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267 return true; |
| 1009 | 268 end |
| 269 | |
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270 prosody.events.add_handler(module:get_host().."/presence", presence_handler); |
| 1009 | 271 module.unload = function() |
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272 prosody.events.remove_handler(module:get_host().."/presence", presence_handler); |
| 1009 | 273 end |
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274 |
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275 local outbound_presence_handler = function(data) |
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276 -- outbound presence recieved |
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277 local origin, stanza = data.origin, data.stanza; |
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278 |
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279 local t = stanza.attr.type; |
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280 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes |
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281 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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282 return true; |
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283 end |
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284 |
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285 local to = stanza.attr.to; |
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286 local to_bare = jid_bare(to); |
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287 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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288 origin.directed = origin.directed or {}; |
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289 if t then -- removing from directed presence list on sending an error or unavailable |
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290 origin.directed[to] = nil; -- FIXME does it make more sense to add to_bare rather than to? |
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291 else |
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292 origin.directed[to] = true; -- FIXME does it make more sense to add to_bare rather than to? |
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293 end |
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294 end |
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295 end |
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296 |
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297 module:hook("pre-presence/full", outbound_presence_handler); |
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298 module:hook("pre-presence/bare", outbound_presence_handler); |
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299 module:hook("pre-presence/host", outbound_presence_handler); |
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300 |
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301 module:hook("presence/bare", function(data) |
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302 -- inbound presence to bare JID recieved |
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303 local origin, stanza = data.origin, data.stanza; |
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304 |
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305 local to = stanza.attr.to; |
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306 if to then |
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307 local t = stanza.attr.type; |
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308 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to bare JID |
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309 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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310 return true; |
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311 end |
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312 |
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313 local user = bare_sessions[to]; |
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314 if user then |
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315 for _, session in pairs(user.sessions) do |
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316 if session.presence then -- only send to available resources |
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317 session.send(stanza); |
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318 end |
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319 end |
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320 end -- no resources not online, discard |
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321 elseif not t or t == "unavailable" then |
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322 handle_normal_presence(origin, stanza, core_route_stanza); |
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323 end |
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324 return true; |
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325 end); |
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326 module:hook("presence/full", function(data) |
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327 -- inbound presence to full JID recieved |
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328 local origin, stanza = data.origin, data.stanza; |
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329 |
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330 local t = stanza.attr.type; |
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331 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to full JID |
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332 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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333 return true; |
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334 end |
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335 |
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336 local session = full_sessions[stanza.attr.to]; |
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337 if session then |
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338 -- TODO fire post processing event |
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339 session.send(stanza); |
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340 end -- resource not online, discard |
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341 return true; |
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342 end); |
