prosody
5d6199a9b4f6
plugins/mod_presence.lua

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plugins/mod_presence.lua @ 1476:5d6199a9b4f6

mod_presence: Prevented normal presence from non-interested resources from being dropped
author Waqas Hussain <waqas20@gmail.com>
date Sun, 05 Jul 2009 12:40:18 +0500
parent 1475:16c8b1a8f6a7
child 1477:e0411d6c9bae
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1 -- Prosody IM v0.4
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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 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 for jid, item in pairs(roster) do -- broadcast to all interested contacts
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66 if item.subscription == "both" or item.subscription == "from" then
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67 stanza.attr.to = jid;
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68 core_route_stanza(origin, stanza);
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69 end
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70 end
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71 local node, host = origin.username, origin.host;
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72 for _, res in pairs(hosts[host].sessions[node].sessions) 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 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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parents: 1475
diff changeset
117 recalc_resource_map(origin);
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
118 end
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
119 if origin.directed then
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parents: 1475
diff changeset
120 for jid in pairs(origin.directed) do
1009
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
121 stanza.attr.to = jid;
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
122 core_route_stanza(origin, stanza);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
123 end
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parents: 1475
diff changeset
124 origin.directed = nil;
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parents:
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125 end
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parents: 1475
diff changeset
126 else
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parents: 1475
diff changeset
127 origin.presence = stanza;
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parents: 1475
diff changeset
128 local priority = stanza:child_with_name("priority");
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
129 if priority and #priority > 0 then
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parents: 1475
diff changeset
130 priority = t_concat(priority);
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
131 if s_find(priority, "^[+-]?[0-9]+$") then
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
132 priority = tonumber(priority);
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
133 if priority < -128 then priority = -128 end
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
134 if priority > 127 then priority = 127 end
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
135 else priority = 0; end
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
136 else priority = 0; end
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
137 if origin.priority ~= priority then
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
138 origin.priority = priority;
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Waqas Hussain <waqas20@gmail.com>
parents: 1475
diff changeset
139 recalc_resource_map(origin);
1009
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Waqas Hussain <waqas20@gmail.com>
parents:
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140 end
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
141 end
1476
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parents: 1475
diff changeset
142 stanza.attr.to = nil; -- reset it
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parents:
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143 end
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
144
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parents:
diff changeset
145 function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
146 local h = hosts[host];
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Waqas Hussain <waqas20@gmail.com>
parents:
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147 local count = 0;
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Waqas Hussain <waqas20@gmail.com>
parents:
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148 if h and h.type == "local" then
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Waqas Hussain <waqas20@gmail.com>
parents:
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149 local u = h.sessions[user];
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parents:
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150 if u then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
151 for k, session in pairs(u.sessions) do
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Waqas Hussain <waqas20@gmail.com>
parents:
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152 local pres = session.presence;
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Waqas Hussain <waqas20@gmail.com>
parents:
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153 if pres then
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Waqas Hussain <waqas20@gmail.com>
parents:
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154 pres.attr.to = jid;
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Waqas Hussain <waqas20@gmail.com>
parents:
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155 core_route_stanza(session, pres);
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Waqas Hussain <waqas20@gmail.com>
parents:
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156 pres.attr.to = nil;
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Waqas Hussain <waqas20@gmail.com>
parents:
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157 count = count + 1;
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Waqas Hussain <waqas20@gmail.com>
parents:
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158 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
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159 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
160 end
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Waqas Hussain <waqas20@gmail.com>
parents:
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161 end
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Matthew Wild <mwild1@gmail.com>
parents: 1210
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162 log("debug", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid);
1009
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Waqas Hussain <waqas20@gmail.com>
parents:
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163 return count;
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
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164 end
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
165
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Waqas Hussain <waqas20@gmail.com>
parents:
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166 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza)
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Waqas Hussain <waqas20@gmail.com>
parents:
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167 local node, host = jid_split(from_bare);
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parents:
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168 local st_from, st_to = stanza.attr.from, stanza.attr.to;
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
169 stanza.attr.from, stanza.attr.to = from_bare, to_bare;
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parents:
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170 log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
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Waqas Hussain <waqas20@gmail.com>
parents:
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171 if stanza.attr.type == "subscribe" then
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Waqas Hussain <waqas20@gmail.com>
parents:
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172 -- 1. route stanza
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Waqas Hussain <waqas20@gmail.com>
parents:
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173 -- 2. roster push (subscription = none, ask = subscribe)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
174 if rostermanager.set_contact_pending_out(node, host, to_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
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175 rostermanager.roster_push(node, host, to_bare);
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
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176 end -- else file error
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Waqas Hussain <waqas20@gmail.com>
parents:
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177 core_route_stanza(origin, stanza);
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Waqas Hussain <waqas20@gmail.com>
parents:
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178 elseif stanza.attr.type == "unsubscribe" then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
179 -- 1. route stanza
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
180 -- 2. roster push (subscription = none or from)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
181 if rostermanager.unsubscribe(node, host, to_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
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182 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed?
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Waqas Hussain <waqas20@gmail.com>
parents:
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183 end -- else file error
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Waqas Hussain <waqas20@gmail.com>
parents:
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184 core_route_stanza(origin, stanza);
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Waqas Hussain <waqas20@gmail.com>
parents:
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185 elseif stanza.attr.type == "subscribed" then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
186 -- 1. route stanza
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
187 -- 2. roster_push ()
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
188 -- 3. send_presence_of_available_resources
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Waqas Hussain <waqas20@gmail.com>
parents:
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189 if rostermanager.subscribed(node, host, to_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
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190 rostermanager.roster_push(node, host, to_bare);
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Waqas Hussain <waqas20@gmail.com>
parents:
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191 end
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Waqas Hussain <waqas20@gmail.com>
parents:
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192 core_route_stanza(origin, stanza);
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parents:
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193 send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
194 elseif stanza.attr.type == "unsubscribed" then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
195 -- 1. route stanza
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
196 -- 2. roster push (subscription = none or to)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
197 if rostermanager.unsubscribed(node, host, to_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
198 rostermanager.roster_push(node, host, to_bare);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
199 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
200 core_route_stanza(origin, stanza);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
201 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
202 stanza.attr.from, stanza.attr.to = st_from, st_to;
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
203 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
204
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
205 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
206 local node, host = jid_split(to_bare);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
207 local st_from, st_to = stanza.attr.from, stanza.attr.to;
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parents:
diff changeset
208 stanza.attr.from, stanza.attr.to = from_bare, to_bare;
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
209 log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
210 if stanza.attr.type == "probe" then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
211 if rostermanager.is_contact_subscribed(node, host, from_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
212 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
213 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
214 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
215 else
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
216 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"}));
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
217 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
218 elseif stanza.attr.type == "subscribe" then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
219 if rostermanager.is_contact_subscribed(node, host, from_bare) then
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parents:
diff changeset
220 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
221 -- Sending presence is not clearly stated in the RFC, but it seems appropriate
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
222 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
223 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
224 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
225 else
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
226 if not rostermanager.is_contact_pending_in(node, host, from_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
227 if rostermanager.set_contact_pending_in(node, host, from_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
228 sessionmanager.send_to_available_resources(node, host, stanza);
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
229 end -- TODO else return error, unable to save
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
230 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
231 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
232 elseif stanza.attr.type == "unsubscribe" then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
233 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
234 rostermanager.roster_push(node, host, from_bare);
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
235 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
236 elseif stanza.attr.type == "subscribed" then
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
237 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
238 rostermanager.roster_push(node, host, from_bare);
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
239 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
240 elseif stanza.attr.type == "unsubscribed" then
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
241 if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
242 rostermanager.roster_push(node, host, from_bare);
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
243 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
244 end -- discard any other type
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
245 stanza.attr.from, stanza.attr.to = st_from, st_to;
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
246 end
a2dd83bc3afa mod_presence: initial commit
Waqas Hussain <waqas20@gmail.com>
parents:
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247
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fa00d56a9fd3 mod_presence: Handle all outbound presence stanzas
Waqas Hussain <waqas20@gmail.com>
parents: 1278
diff changeset
248 local outbound_presence_handler = function(data)
1282
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Waqas Hussain <waqas20@gmail.com>
parents: 1281
diff changeset
249 -- outbound presence recieved
1276
d0e80c1578e1 mod_presence: Handle outbound presence to full JIDs
Waqas Hussain <waqas20@gmail.com>
parents: 1245
diff changeset
250 local origin, stanza = data.origin, data.stanza;
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Waqas Hussain <waqas20@gmail.com>
parents: 1245
diff changeset
251
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a9b1675ad16e mod_presence: Check for nil 'to' attribute in all cases for outgoing stanzas
Waqas Hussain <waqas20@gmail.com>
parents: 1285
diff changeset
252 local to = stanza.attr.to;
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253 if to then
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254 local t = stanza.attr.type;
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255 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes
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256 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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257 return true;
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258 end
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259
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260 local to_bare = jid_bare(to);
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261 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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262 origin.directed = origin.directed or {};
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263 if t then -- removing from directed presence list on sending an error or unavailable
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264 origin.directed[to] = nil; -- FIXME does it make more sense to add to_bare rather than to?
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265 else
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266 origin.directed[to] = true; -- FIXME does it make more sense to add to_bare rather than to?
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267 end
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268 end
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269 end -- TODO maybe handle normal presence here, instead of letting it pass to incoming handlers?
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270 end
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271
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272 module:hook("pre-presence/full", outbound_presence_handler);
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273 module:hook("pre-presence/bare", outbound_presence_handler);
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274 module:hook("pre-presence/host", outbound_presence_handler);
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275
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276 module:hook("presence/bare", function(data)
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277 -- inbound presence to bare JID recieved
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278 local origin, stanza = data.origin, data.stanza;
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279
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280 local to = stanza.attr.to;
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281 local t = stanza.attr.type;
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282 if to then
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283 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to bare JID
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284 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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285 return true;
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286 end
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287
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288 local user = bare_sessions[to];
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289 if user then
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290 for _, session in pairs(user.sessions) do
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291 if session.presence then -- only send to available resources
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292 session.send(stanza);
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293 end
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294 end
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295 end -- no resources not online, discard
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296 elseif not t or t == "unavailable" then
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297 handle_normal_presence(origin, stanza, core_route_stanza);
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298 end
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299 return true;
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300 end);
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301 module:hook("presence/full", function(data)
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302 -- inbound presence to full 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 t = stanza.attr.type;
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306 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to full JID
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307 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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308 return true;
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309 end
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310
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311 local session = full_sessions[stanza.attr.to];
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312 if session then
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313 -- TODO fire post processing event
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314 session.send(stanza);
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315 end -- resource not online, discard
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316 return true;
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317 end);