prosody
fb522fbd495e
core/sessionmanager.lua

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core/sessionmanager.lua @ 4666:fb522fbd495e

moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
author Matthew Wild <mwild1@gmail.com>
date Mon, 23 Apr 2012 15:38:40 +0100
parent 4552:414d857ee125
child 4813:77da9671ac39
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rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local tonumber, tostring, setmetatable = tonumber, tostring, setmetatable;
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10 local ipairs, pairs, print, next= ipairs, pairs, print, next;
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11
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12 local hosts = hosts;
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13 local full_sessions = full_sessions;
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14 local bare_sessions = bare_sessions;
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15
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16 local logger = require "util.logger";
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17 local log = logger.init("sessionmanager");
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18 local error = error;
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19 local rm_load_roster = require "core.rostermanager".load_roster;
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20 local config_get = require "core.configmanager".get;
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21 local resourceprep = require "util.encodings".stringprep.resourceprep;
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22 local nodeprep = require "util.encodings".stringprep.nodeprep;
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23 local uuid_generate = require "util.uuid".generate;
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25 local initialize_filters = require "util.filters".initialize;
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26 local fire_event = prosody.events.fire_event;
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27 local add_task = require "util.timer".add_task;
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28 local gettime = require "socket".gettime;
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30 local st = require "util.stanza";
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32 local newproxy = newproxy;
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33 local getmetatable = getmetatable;
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35 module "sessionmanager"
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37 local open_sessions = 0;
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39 function new_session(conn)
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40 local session = { conn = conn, type = "c2s_unauthed", conntime = gettime() };
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41 if true then
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42 session.trace = newproxy(true);
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43 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
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44 end
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45 open_sessions = open_sessions + 1;
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46 log("debug", "open sessions now: ".. open_sessions);
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48 local filter = initialize_filters(session);
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49 local w = conn.write;
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50 session.send = function (t)
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51 if t.name then
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52 t = filter("stanzas/out", t);
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53 end
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54 if t then
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55 t = filter("bytes/out", tostring(t));
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56 if t then
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57 return w(conn, t);
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58 end
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59 end
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60 end
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61 session.ip = conn:ip();
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62 local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
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63 session.log = logger.init(conn_name);
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64
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65 return session;
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66 end
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68 local resting_session = { -- Resting, not dead
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69 destroyed = true;
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70 type = "c2s_destroyed";
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71 close = function (session)
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72 session.log("debug", "Attempt to close already-closed session");
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73 end;
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74 filter = function (type, data) return data; end;
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75 }; resting_session.__index = resting_session;
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77 function retire_session(session)
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78 local log = session.log or log;
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79 for k in pairs(session) do
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80 if k ~= "trace" and k ~= "log" and k ~= "id" then
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81 session[k] = nil;
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82 end
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83 end
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85 function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); end
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86 function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
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87 return setmetatable(session, resting_session);
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88 end
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89
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90 function destroy_session(session, err)
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91 (session.log or log)("info", "Destroying session for %s (%s@%s)%s", session.full_jid or "(unknown)", session.username or "(unknown)", session.host or "(unknown)", err and (": "..err) or "");
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92 if session.destroyed then return; end
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93
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94 -- Remove session/resource from user's session list
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95 if session.full_jid then
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96 local host_session = hosts[session.host];
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98 -- Allow plugins to prevent session destruction
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99 if host_session.events.fire_event("pre-resource-unbind", {session=session, error=err}) then
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100 return;
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101 end
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102
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103 host_session.sessions[session.username].sessions[session.resource] = nil;
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104 full_sessions[session.full_jid] = nil;
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105
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106 if not next(host_session.sessions[session.username].sessions) then
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107 log("debug", "All resources of %s are now offline", session.username);
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108 host_session.sessions[session.username] = nil;
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109 bare_sessions[session.username..'@'..session.host] = nil;
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110 end
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111
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112 host_session.events.fire_event("resource-unbind", {session=session, error=err});
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113 end
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114
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115 retire_session(session);
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116 end
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117
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118 function make_authenticated(session, username)
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119 username = nodeprep(username);
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120 if not username or #username == 0 then return nil, "Invalid username"; end
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121 session.username = username;
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122 if session.type == "c2s_unauthed" then
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123 session.type = "c2s";
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124 end
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125 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
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126 return true;
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parents: 30
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127 end
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parents: 30
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128
304
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129 -- returns true, nil on success
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130 -- returns nil, err_type, err, err_message on failure
38
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131 function bind_resource(session, resource)
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132 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
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133 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
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134 -- We don't support binding multiple resources
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135
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136 resource = resourceprep(resource);
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137 resource = resource ~= "" and resource or uuid_generate();
38
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138 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
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parents: 30
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139
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parents: 30
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140 if not hosts[session.host].sessions[session.username] then
1224
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141 local sessions = { sessions = {} };
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142 hosts[session.host].sessions[session.username] = sessions;
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c253905a8a55 sessionmanager: It's username@host, not host@username :)
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143 bare_sessions[session.username..'@'..session.host] = sessions;
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144 else
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145 local sessions = hosts[session.host].sessions[session.username].sessions;
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146 local limit = config_get(session.host, "core", "max_resources") or 10;
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147 if #sessions >= limit then
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69fb1cb6b551 sessionmanager: Change error for reaching resource limit from 'conflict' to 'resource-constraint' during session bind.
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148 return nil, "cancel", "resource-constraint", "Resource limit reached; only "..limit.." resources allowed";
429
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149 end
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150 if sessions[resource] then
38
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151 -- Resource conflict
429
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152 local policy = config_get(session.host, "core", "conflict_resolve");
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153 local increment;
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154 if policy == "random" then
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parents: 357
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155 resource = uuid_generate();
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156 increment = true;
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parents: 357
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157 elseif policy == "increment" then
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parents: 357
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158 increment = true; -- TODO ping old resource
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parents: 357
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159 elseif policy == "kick_new" then
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160 return nil, "cancel", "conflict", "Resource already exists";
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161 else -- if policy == "kick_old" then
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parents: 760
diff changeset
162 sessions[resource]:close {
429
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163 condition = "conflict";
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parents: 357
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164 text = "Replaced by new connection";
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parents: 357
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165 };
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parents: 760
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166 if not next(sessions) then
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parents: 760
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167 hosts[session.host].sessions[session.username] = { sessions = sessions };
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8b3753b080fc sessionmanager: Reset bare_sessions[user] after resource conflict resolution. Fixes the other stanza gobbling bug \o/
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168 bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username];
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169 end
429
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170 end
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parents: 357
diff changeset
171 if increment and sessions[resource] then
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parents: 357
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172 local count = 1;
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173 while sessions[resource.."#"..count] do
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174 count = count + 1;
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175 end
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parents: 357
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176 resource = resource.."#"..count;
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177 end
38
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178 end
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179 end
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180
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181 session.resource = resource;
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182 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
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183 hosts[session.host].sessions[session.username].sessions[resource] = session;
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184 full_sessions[session.full_jid] = session;
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185
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186 local err;
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187 session.roster, err = rm_load_roster(session.username, session.host);
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188 if err then
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189 full_sessions[session.full_jid] = nil;
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190 hosts[session.host].sessions[session.username].sessions[resource] = nil;
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191 session.full_jid = nil;
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diff changeset
192 session.resource = nil;
3091
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parents: 3089
diff changeset
193 if next(bare_sessions[session.username..'@'..session.host].sessions) == nil then
3088
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194 bare_sessions[session.username..'@'..session.host] = nil;
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195 hosts[session.host].sessions[session.username] = nil;
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196 end
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197 return nil, "cancel", "internal-server-error", "Error loading roster";
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198 end
77
531b981f2d17 Load roster on resource bind
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parents: 57
diff changeset
199
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parents: 1471
diff changeset
200 hosts[session.host].events.fire_event("resource-bind", {session=session});
1379
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parents: 1301
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201
38
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diff changeset
202 return true;
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203 end
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parents: 30
diff changeset
204
175
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parents: 156
diff changeset
205 function send_to_available_resources(user, host, stanza)
2140
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diff changeset
206 local jid = user.."@"..host;
176
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diff changeset
207 local count = 0;
2140
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diff changeset
208 local user = bare_sessions[jid];
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parents: 1929
diff changeset
209 if user then
94b7ba39787d sessionmanager: Fixed and cleaned function send_to_available_resources(). The 'to' attribute for presence subscription stanzas is now preserved.
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parents: 1929
diff changeset
210 for k, session in pairs(user.sessions) do
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parents: 1929
diff changeset
211 if session.presence then
94b7ba39787d sessionmanager: Fixed and cleaned function send_to_available_resources(). The 'to' attribute for presence subscription stanzas is now preserved.
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parents: 1929
diff changeset
212 session.send(stanza);
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parents: 1929
diff changeset
213 count = count + 1;
175
5f71d290bb44 Routing code reorganization
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parents: 156
diff changeset
214 end
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parents: 156
diff changeset
215 end
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parents: 156
diff changeset
216 end
176
e5cd2a03891d Outbound presence subscription
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parents: 175
diff changeset
217 return count;
175
5f71d290bb44 Routing code reorganization
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parents: 156
diff changeset
218 end
5f71d290bb44 Routing code reorganization
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parents: 156
diff changeset
219
2141
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diff changeset
220 function send_to_interested_resources(user, host, stanza)
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diff changeset
221 local jid = user.."@"..host;
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diff changeset
222 local count = 0;
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diff changeset
223 local user = bare_sessions[jid];
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parents: 2140
diff changeset
224 if user then
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diff changeset
225 for k, session in pairs(user.sessions) do
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diff changeset
226 if session.interested then
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parents: 2140
diff changeset
227 session.send(stanza);
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228 count = count + 1;
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229 end
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parents: 2140
diff changeset
230 end
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parents: 2140
diff changeset
231 end
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diff changeset
232 return count;
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diff changeset
233 end
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parents: 2140
diff changeset
234
614
335f2921ae0c Newline at end of file for sessionmanager
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parents: 597
diff changeset
235 return _M;