prosody
1e01a913baf5
core/sessionmanager.lua

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core/sessionmanager.lua @ 1225:1e01a913baf5

sessionmanager: Fixed an old FIXME: A problem caused by an error on an authenticated but unbound session
author Waqas Hussain <waqas20@gmail.com>
date Fri, 29 May 2009 23:22:58 +0500
parent 1224:35fa588e43a6
child 1226:3b5f9dac2045
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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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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 full_sessions = full_sessions;
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19 local bare_sessions = bare_sessions;
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21 local modulemanager = require "core.modulemanager";
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22 local log = require "util.logger".init("sessionmanager");
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23 local error = error;
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24 local uuid_generate = require "util.uuid".generate;
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25 local rm_load_roster = require "core.rostermanager".load_roster;
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26 local config_get = require "core.configmanager".get;
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27 local nameprep = require "util.encodings".stringprep.nameprep;
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28
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29 local fire_event = require "core.eventmanager".fire_event;
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31 local gettime = require "socket".gettime;
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32
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33 local st = require "util.stanza";
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34
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35 local newproxy = newproxy;
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36 local getmetatable = getmetatable;
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37
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38 module "sessionmanager"
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39
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40 local open_sessions = 0;
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41
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42 function new_session(conn)
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43 local session = { conn = conn, priority = 0, type = "c2s_unauthed", conntime = gettime() };
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44 if true then
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45 session.trace = newproxy(true);
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46 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
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47 end
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48 open_sessions = open_sessions + 1;
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49 log("debug", "open sessions now: ".. open_sessions);
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50 local w = conn.write;
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51 session.send = function (t) w(tostring(t)); end
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52 session.ip = conn.ip();
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53 return session;
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54 end
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55
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56 function destroy_session(session, err)
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57 (session.log or log)("info", "Destroying session for %s (%s@%s)", session.full_jid or "(unknown)", session.username or "(unknown)", session.host or "(unknown)");
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58
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59 -- Send unavailable presence
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60 if session.presence then
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61 local pres = st.presence{ type = "unavailable" };
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62 if (not err) or err == "closed" then err = "connection closed"; end
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63 pres:tag("status"):text("Disconnected: "..err):up();
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64 session:dispatch_stanza(pres);
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65 end
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66
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67 -- Remove session/resource from user's session list
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68 if session.full_jid then
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69 if session.resource then
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70 hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
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71 full_sessions[session.full_jid] = nil;
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72 end
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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 bare_sessions[session.host..'@'..session.username] = nil;
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78 end
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79 end
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80
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81 for k in pairs(session) do
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82 if k ~= "trace" then
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83 session[k] = nil;
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84 end
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85 end
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86 end
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87
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88 function make_authenticated(session, username)
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89 session.username = username;
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90 if session.type == "c2s_unauthed" then
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91 session.type = "c2s";
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92 end
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93 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
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94 return true;
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95 end
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96
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97 -- returns true, nil on success
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98 -- returns nil, err_type, err, err_message on failure
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99 function bind_resource(session, resource)
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100 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
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101 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
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102 -- We don't support binding multiple resources
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103
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104 resource = resource or uuid_generate();
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105 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
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106
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107 if not hosts[session.host].sessions[session.username] then
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108 local sessions = { sessions = {} };
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109 hosts[session.host].sessions[session.username] = sessions;
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110 bare_sessions[session.host..'@'..session.username] = sessions;
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111 else
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112 local sessions = hosts[session.host].sessions[session.username].sessions;
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113 local limit = config_get(session.host, "core", "max_resources") or 10;
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114 if #sessions >= limit then
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115 return nil, "cancel", "conflict", "Resource limit reached; only "..limit.." resources allowed";
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116 end
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117 if sessions[resource] then
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118 -- Resource conflict
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119 local policy = config_get(session.host, "core", "conflict_resolve");
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120 local increment;
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121 if policy == "random" then
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122 resource = uuid_generate();
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123 increment = true;
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124 elseif policy == "increment" then
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125 increment = true; -- TODO ping old resource
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126 elseif policy == "kick_new" then
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127 return nil, "cancel", "conflict", "Resource already exists";
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128 else -- if policy == "kick_old" then
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129 sessions[resource]:close {
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130 condition = "conflict";
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131 text = "Replaced by new connection";
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132 };
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133 if not next(sessions) then
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134 hosts[session.host].sessions[session.username] = { sessions = sessions };
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135 end
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136 end
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137 if increment and sessions[resource] then
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138 local count = 1;
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139 while sessions[resource.."#"..count] do
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140 count = count + 1;
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141 end
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142 resource = resource.."#"..count;
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143 end
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144 end
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145 end
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146
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147 session.resource = resource;
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148 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
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149 hosts[session.host].sessions[session.username].sessions[resource] = session;
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150 full_sessions[session.full_jid] = 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 -- If session.secure is *false* (not nil) then it means we /were/ encrypting
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175 -- since we now have a new stream header, session is secured
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176 if session.secure == false then
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177 session.secure = true;
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178 end
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179
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180 local features = st.stanza("stream:features");
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181 fire_event("stream-features", session, features);
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182
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183 send(features);
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184
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ba3639692493 sessionmanager: Miscellaneous logging improvements, changing levels, improving messages and using session loggers where possible
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185 (session.log or log)("debug", "Sent reply <stream:stream> to client");
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186 session.notopen = nil;
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187 end
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188
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189 function streamclosed(session)
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190 session.send("</stream:stream>");
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191 session.notopen = true;
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192 end
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193
175
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194 function send_to_available_resources(user, host, stanza)
176
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195 local count = 0;
175
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196 local to = stanza.attr.to;
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197 stanza.attr.to = nil;
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198 local h = hosts[host];
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199 if h and h.type == "local" then
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200 local u = h.sessions[user];
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201 if u then
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202 for k, session in pairs(u.sessions) do
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203 if session.presence then
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diff changeset
204 session.send(stanza);
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205 count = count + 1;
175
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206 end
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diff changeset
207 end
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208 end
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diff changeset
209 end
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diff changeset
210 stanza.attr.to = to;
176
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diff changeset
211 return count;
175
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diff changeset
212 end
5f71d290bb44 Routing code reorganization
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diff changeset
213
614
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diff changeset
214 return _M;