prosody
b873715ffd96
core/sessionmanager.lua

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core/sessionmanager.lua @ 1063:b873715ffd96

configure: Honour --sysconfdir parameter; thanks to Michael Scherer
author Matthew Wild <mwild1@gmail.com>
date Tue, 28 Apr 2009 22:53:51 +0100
parent 970:5516f9e66482
child 1076:ba3639692493
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2c0b9e3c11c3 0.3->0.4
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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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b1885732e979 GPL->MIT!
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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
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10
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11 local tonumber, tostring = tonumber, tostring;
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12 local ipairs, pairs, print, next= ipairs, pairs, print, next;
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13 local collectgarbage = collectgarbage;
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14 local m_random = import("math", "random");
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15 local format = import("string", "format");
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16
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17 local hosts = hosts;
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18 local sessions = sessions;
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19
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20 local modulemanager = require "core.modulemanager";
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21 local log = require "util.logger".init("sessionmanager");
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22 local error = error;
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23 local uuid_generate = require "util.uuid".generate;
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24 local rm_load_roster = require "core.rostermanager".load_roster;
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25 local config_get = require "core.configmanager".get;
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26 local nameprep = require "util.encodings".stringprep.nameprep;
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27
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28 local fire_event = require "core.eventmanager".fire_event;
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30 local gettime = require "socket".gettime;
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31
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32 local st = require "util.stanza";
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33
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34 local newproxy = newproxy;
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35 local getmetatable = getmetatable;
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36
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37 module "sessionmanager"
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39 local open_sessions = 0;
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41 function new_session(conn)
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42 local session = { conn = conn, priority = 0, type = "c2s_unauthed", conntime = gettime() };
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43 if true then
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44 session.trace = newproxy(true);
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45 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
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46 end
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47 open_sessions = open_sessions + 1;
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48 log("info", "open sessions now: ".. open_sessions);
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49 local w = conn.write;
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50 session.send = function (t) w(tostring(t)); end
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51 session.ip = conn.ip();
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52 return session;
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53 end
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55 function destroy_session(session, err)
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56 (session.log or log)("info", "Destroying session");
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57
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58 -- Send unavailable presence
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59 if session.presence then
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60 local pres = st.presence{ type = "unavailable" };
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61 if (not err) or err == "closed" then err = "connection closed"; end
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62 pres:tag("status"):text("Disconnected: "..err):up();
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63 session:dispatch_stanza(pres);
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64 end
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65
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66 -- Remove session/resource from user's session list
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67 if session.host and session.username then
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68 -- FIXME: How can the below ever be nil? (but they sometimes are...)
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69 if hosts[session.host] and hosts[session.host].sessions[session.username] then
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70 if session.resource then
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71 hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
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72 end
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73
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74 if not next(hosts[session.host].sessions[session.username].sessions) then
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75 log("debug", "All resources of %s are now offline", session.username);
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76 hosts[session.host].sessions[session.username] = nil;
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77 end
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78 else
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79 log("error", "host or session table didn't exist, please report this! Host: %s [%s] Sessions: %s [%s]",
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80 tostring(hosts[session.host]), tostring(session.host),
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81 tostring(hosts[session.host].sessions[session.username] ), tostring(session.username));
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82 end
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83 end
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84
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85 for k in pairs(session) do
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86 if k ~= "trace" then
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87 session[k] = nil;
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88 end
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89 end
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90 end
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91
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92 function make_authenticated(session, username)
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93 session.username = username;
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94 if session.type == "c2s_unauthed" then
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95 session.type = "c2s";
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96 end
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97 return true;
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98 end
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99
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100 -- returns true, nil on success
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101 -- returns nil, err_type, err, err_message on failure
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102 function bind_resource(session, resource)
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103 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
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104 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
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105 -- We don't support binding multiple resources
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106
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107 resource = resource or uuid_generate();
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108 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
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109
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110 if not hosts[session.host].sessions[session.username] then
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111 hosts[session.host].sessions[session.username] = { sessions = {} };
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112 else
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113 local sessions = hosts[session.host].sessions[session.username].sessions;
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114 local limit = config_get(session.host, "core", "max_resources") or 10;
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115 if #sessions >= limit then
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116 return nil, "cancel", "conflict", "Resource limit reached; only "..limit.." resources allowed";
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117 end
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118 if sessions[resource] then
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119 -- Resource conflict
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120 local policy = config_get(session.host, "core", "conflict_resolve");
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121 local increment;
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122 if policy == "random" then
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123 resource = uuid_generate();
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124 increment = true;
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125 elseif policy == "increment" then
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126 increment = true; -- TODO ping old resource
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127 elseif policy == "kick_new" then
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128 return nil, "cancel", "conflict", "Resource already exists";
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129 else -- if policy == "kick_old" then
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130 sessions[resource]:close {
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131 condition = "conflict";
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132 text = "Replaced by new connection";
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133 };
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134 if not next(sessions) then
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135 hosts[session.host].sessions[session.username] = { sessions = sessions };
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136 end
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137 end
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138 if increment and sessions[resource] then
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139 local count = 1;
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140 while sessions[resource.."#"..count] do
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141 count = count + 1;
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142 end
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143 resource = resource.."#"..count;
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144 end
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145 end
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146 end
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147
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148 session.resource = resource;
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149 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
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150 hosts[session.host].sessions[session.username].sessions[resource] = session;
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151
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152 session.roster = rm_load_roster(session.username, session.host);
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153
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154 return true;
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155 end
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156
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157 function streamopened(session, attr)
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158 local send = session.send;
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159 session.host = attr.to or error("Client failed to specify destination hostname");
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160 session.host = nameprep(session.host);
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161 session.version = tonumber(attr.version) or 0;
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162 session.streamid = m_random(1000000, 99999999);
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163 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
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164
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165 send("<?xml version='1.0'?>");
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166 send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' version='1.0'>", session.streamid, session.host));
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167
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168 if not hosts[session.host] then
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169 -- We don't serve this host...
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170 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
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171 return;
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172 end
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173
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174 local features = st.stanza("stream:features");
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175 fire_event("stream-features", session, features);
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176
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177 send(features);
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178
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179 (session.log or log)("info", "Sent reply <stream:stream> to client");
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180 session.notopen = nil;
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181 end
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182
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183 function streamclosed(session)
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184 session.send("</stream:stream>");
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185 session.notopen = true;
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186 end
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187
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188 function send_to_available_resources(user, host, stanza)
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189 local count = 0;
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190 local to = stanza.attr.to;
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191 stanza.attr.to = nil;
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192 local h = hosts[host];
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193 if h and h.type == "local" then
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194 local u = h.sessions[user];
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195 if u then
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196 for k, session in pairs(u.sessions) do
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197 if session.presence then
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198 session.send(stanza);
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199 count = count + 1;
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200 end
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201 end
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202 end
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203 end
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204 stanza.attr.to = to;
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205 return count;
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206 end
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207
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208 return _M;