prosody
db27a4c18b6a
core/sessionmanager.lua

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core/sessionmanager.lua @ 4543:db27a4c18b6a

mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
author Matthew Wild <mwild1@gmail.com>
date Sun, 22 Jan 2012 23:57:13 +0000
parent 4456:2724bc4c9dff
child 4548:e6e5c76ff009
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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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24 local initialize_filters = require "util.filters".initialize;
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25 local fire_event = prosody.events.fire_event;
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26 local add_task = require "util.timer".add_task;
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27 local gettime = require "socket".gettime;
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29 local st = require "util.stanza";
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31 local c2s_timeout = config_get("*", "core", "c2s_timeout");
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33 local newproxy = newproxy;
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34 local getmetatable = getmetatable;
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36 module "sessionmanager"
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38 local open_sessions = 0;
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40 function new_session(conn)
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41 local session = { conn = conn, type = "c2s_unauthed", conntime = gettime() };
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42 if true then
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43 session.trace = newproxy(true);
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44 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
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45 end
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46 open_sessions = open_sessions + 1;
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47 log("debug", "open sessions now: ".. open_sessions);
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49 local filter = initialize_filters(session);
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50 local w = conn.write;
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51 session.send = function (t)
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52 if t.name then
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53 t = filter("stanzas/out", t);
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54 end
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55 if t then
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56 t = filter("bytes/out", tostring(t));
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57 if t then
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58 return w(conn, t);
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59 end
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60 end
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61 end
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62 session.ip = conn:ip();
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63 local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
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64 session.log = logger.init(conn_name);
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66 if c2s_timeout then
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67 add_task(c2s_timeout, function ()
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68 if session.type == "c2s_unauthed" then
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69 session:close("connection-timeout");
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70 end
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71 end);
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72 end
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73
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74 return session;
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75 end
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76
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77 local resting_session = { -- Resting, not dead
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78 destroyed = true;
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79 type = "c2s_destroyed";
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80 close = function (session)
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81 session.log("debug", "Attempt to close already-closed session");
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82 end;
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83 filter = function (type, data) return data; end;
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84 }; resting_session.__index = resting_session;
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86 function retire_session(session)
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87 local log = session.log or log;
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88 for k in pairs(session) do
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89 if k ~= "trace" and k ~= "log" and k ~= "id" then
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90 session[k] = nil;
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91 end
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92 end
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94 function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); end
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95 function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
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96 return setmetatable(session, resting_session);
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97 end
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98
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99 function destroy_session(session, err)
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100 (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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101 if session.destroyed then return; end
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102
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103 -- Remove session/resource from user's session list
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104 if session.full_jid then
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105 local host_session = hosts[session.host];
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106
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107 -- Allow plugins to prevent session destruction
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108 if host_session.events.fire_event("pre-resource-unbind", {session=session, error=err}) then
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109 return;
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110 end
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111
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112 host_session.sessions[session.username].sessions[session.resource] = nil;
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113 full_sessions[session.full_jid] = nil;
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114
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115 if not next(host_session.sessions[session.username].sessions) then
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116 log("debug", "All resources of %s are now offline", session.username);
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117 host_session.sessions[session.username] = nil;
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118 bare_sessions[session.username..'@'..session.host] = nil;
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119 end
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120
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121 host_session.events.fire_event("resource-unbind", {session=session, error=err});
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122 end
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123
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124 retire_session(session);
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125 end
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126
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127 function make_authenticated(session, username)
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128 username = nodeprep(username);
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5ea90ee96022 sessionmanager: Fixed a traceback on invalid usernames (typo in previous commit).
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129 if not username or #username == 0 then return nil, "Invalid username"; end
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130 session.username = username;
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131 if session.type == "c2s_unauthed" then
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132 session.type = "c2s";
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133 end
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134 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
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135 return true;
38
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136 end
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137
304
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138 -- returns true, nil on success
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139 -- returns nil, err_type, err, err_message on failure
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140 function bind_resource(session, resource)
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141 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
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142 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
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143 -- We don't support binding multiple resources
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144
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145 resource = resourceprep(resource);
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146 resource = resource ~= "" and resource or uuid_generate();
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147 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
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148
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149 if not hosts[session.host].sessions[session.username] then
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150 local sessions = { sessions = {} };
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151 hosts[session.host].sessions[session.username] = sessions;
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152 bare_sessions[session.username..'@'..session.host] = sessions;
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153 else
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154 local sessions = hosts[session.host].sessions[session.username].sessions;
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155 local limit = config_get(session.host, "core", "max_resources") or 10;
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156 if #sessions >= limit then
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157 return nil, "cancel", "resource-constraint", "Resource limit reached; only "..limit.." resources allowed";
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158 end
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159 if sessions[resource] then
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160 -- Resource conflict
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161 local policy = config_get(session.host, "core", "conflict_resolve");
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162 local increment;
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163 if policy == "random" then
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164 resource = uuid_generate();
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165 increment = true;
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166 elseif policy == "increment" then
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167 increment = true; -- TODO ping old resource
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168 elseif policy == "kick_new" then
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169 return nil, "cancel", "conflict", "Resource already exists";
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170 else -- if policy == "kick_old" then
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171 sessions[resource]:close {
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172 condition = "conflict";
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173 text = "Replaced by new connection";
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174 };
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175 if not next(sessions) then
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176 hosts[session.host].sessions[session.username] = { sessions = sessions };
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177 bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username];
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178 end
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179 end
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180 if increment and sessions[resource] then
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181 local count = 1;
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182 while sessions[resource.."#"..count] do
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183 count = count + 1;
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184 end
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185 resource = resource.."#"..count;
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186 end
38
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187 end
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188 end
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189
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190 session.resource = resource;
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191 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
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192 hosts[session.host].sessions[session.username].sessions[resource] = session;
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193 full_sessions[session.full_jid] = session;
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diff changeset
194
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195 local err;
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196 session.roster, err = rm_load_roster(session.username, session.host);
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197 if err then
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198 full_sessions[session.full_jid] = nil;
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199 hosts[session.host].sessions[session.username].sessions[resource] = nil;
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200 session.full_jid = nil;
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diff changeset
201 session.resource = nil;
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d6a059af2077 rostermanager: Correctly clear the bare_sessions table on roster load errors during bind.
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diff changeset
202 if next(bare_sessions[session.username..'@'..session.host].sessions) == nil then
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diff changeset
203 bare_sessions[session.username..'@'..session.host] = nil;
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diff changeset
204 hosts[session.host].sessions[session.username] = nil;
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diff changeset
205 end
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diff changeset
206 return nil, "cancel", "internal-server-error", "Error loading roster";
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diff changeset
207 end
77
531b981f2d17 Load roster on resource bind
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diff changeset
208
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da11f2652ae9 sessionmanager: Replace raw session by an event data table for resource bind/unbind events, allowing extra data
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diff changeset
209 hosts[session.host].events.fire_event("resource-bind", {session=session});
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diff changeset
210
38
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diff changeset
211 return true;
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diff changeset
212 end
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diff changeset
213
175
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diff changeset
214 function send_to_available_resources(user, host, stanza)
2140
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diff changeset
215 local jid = user.."@"..host;
176
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diff changeset
216 local count = 0;
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diff changeset
217 local user = bare_sessions[jid];
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diff changeset
218 if user then
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parents: 1929
diff changeset
219 for k, session in pairs(user.sessions) do
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diff changeset
220 if session.presence then
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parents: 1929
diff changeset
221 session.send(stanza);
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diff changeset
222 count = count + 1;
175
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diff changeset
223 end
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parents: 156
diff changeset
224 end
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diff changeset
225 end
176
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diff changeset
226 return count;
175
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diff changeset
227 end
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diff changeset
228
2141
f544729f9228 sessionmanager: Added function send_to_interested_resources().
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diff changeset
229 function send_to_interested_resources(user, host, stanza)
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diff changeset
230 local jid = user.."@"..host;
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diff changeset
231 local count = 0;
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diff changeset
232 local user = bare_sessions[jid];
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diff changeset
233 if user then
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diff changeset
234 for k, session in pairs(user.sessions) do
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diff changeset
235 if session.interested then
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diff changeset
236 session.send(stanza);
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diff changeset
237 count = count + 1;
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238 end
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diff changeset
239 end
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diff changeset
240 end
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diff changeset
241 return count;
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diff changeset
242 end
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diff changeset
243
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diff changeset
244 return _M;