Wed, 03 Dec 2008 19:43:59 +0100
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1 | -- Prosody IM v0.1 |
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2 | -- Copyright (C) 2008 Matthew Wild |
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3 | -- Copyright (C) 2008 Waqas Hussain |
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4 | -- |
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5 | -- This program is free software; you can redistribute it and/or |
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6 | -- modify it under the terms of the GNU General Public License |
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7 | -- as published by the Free Software Foundation; either version 2 |
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8 | -- of the License, or (at your option) any later version. |
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9 | -- |
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10 | -- This program is distributed in the hope that it will be useful, |
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11 | -- but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | -- GNU General Public License for more details. |
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14 | -- |
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15 | -- You should have received a copy of the GNU General Public License |
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16 | -- along with this program; if not, write to the Free Software |
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17 | -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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18 | -- |
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19 | |
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20 | |
30 | 21 | |
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22 | local tonumber, tostring = tonumber, tostring; |
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23 | local ipairs, pairs, print, next= ipairs, pairs, print, next; |
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24 | local collectgarbage = collectgarbage; |
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25 | local m_random = import("math", "random"); |
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26 | local format = import("string", "format"); |
38 | 27 | |
28 | local hosts = hosts; | |
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29 | local sessions = sessions; |
38 | 30 | |
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31 | local modulemanager = require "core.modulemanager"; |
30 | 32 | local log = require "util.logger".init("sessionmanager"); |
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33 | local error = error; |
145 | 34 | local uuid_generate = require "util.uuid".generate; |
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35 | local rm_load_roster = require "core.rostermanager".load_roster; |
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36 | local config_get = require "core.configmanager".get; |
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37 | |
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38 | local st = require "util.stanza"; |
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39 | |
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40 | local newproxy = newproxy; |
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41 | local getmetatable = getmetatable; |
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42 | |
30 | 43 | module "sessionmanager" |
44 | ||
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45 | local open_sessions = 0; |
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46 | |
30 | 47 | function new_session(conn) |
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48 | local session = { conn = conn, priority = 0, type = "c2s_unauthed" }; |
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49 | if true then |
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50 | session.trace = newproxy(true); |
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51 | getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("Session got collected, now "..open_sessions.." sessions are allocated") end; |
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52 | end |
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53 | open_sessions = open_sessions + 1; |
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54 | log("info", "open sessions now: ".. open_sessions); |
30 | 55 | local w = conn.write; |
56 | session.send = function (t) w(tostring(t)); end | |
57 | return session; | |
58 | end | |
59 | ||
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60 | function destroy_session(session, err) |
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61 | (session.log or log)("info", "Destroying session"); |
331 | 62 | |
63 | -- Send unavailable presence | |
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64 | if session.presence then |
331 | 65 | local pres = st.presence{ type = "unavailable" }; |
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66 | if (not err) or err == "closed" then err = "connection closed"; end |
331 | 67 | pres:tag("status"):text("Disconnected: "..err); |
68 | session.stanza_dispatch(pres); | |
69 | end | |
70 | ||
71 | -- Remove session/resource from user's session list | |
148 | 72 | if session.host and session.username then |
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73 | if session.resource then |
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74 | hosts[session.host].sessions[session.username].sessions[session.resource] = nil; |
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75 | end |
148 | 76 | if hosts[session.host] and hosts[session.host].sessions[session.username] then |
77 | if not next(hosts[session.host].sessions[session.username].sessions) then | |
78 | log("debug", "All resources of %s are now offline", session.username); | |
79 | hosts[session.host].sessions[session.username] = nil; | |
80 | end | |
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81 | end |
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82 | end |
331 | 83 | |
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84 | for k in pairs(session) do |
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85 | if k ~= "trace" then |
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86 | session[k] = nil; |
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87 | end |
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88 | end |
38 | 89 | end |
90 | ||
91 | function make_authenticated(session, username) | |
92 | session.username = username; | |
93 | if session.type == "c2s_unauthed" then | |
94 | session.type = "c2s"; | |
95 | end | |
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96 | return true; |
38 | 97 | end |
98 | ||
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99 | -- returns true, nil on success |
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100 | -- returns nil, err_type, err, err_message on failure |
38 | 101 | function bind_resource(session, resource) |
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102 | if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end |
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103 | if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end |
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104 | -- We don't support binding multiple resources |
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105 | |
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106 | resource = resource or uuid_generate(); |
38 | 107 | --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing |
108 | ||
109 | if not hosts[session.host].sessions[session.username] then | |
110 | hosts[session.host].sessions[session.username] = { sessions = {} }; | |
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 |
38 | 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 | hosts[session.host].sessions[session.username].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 | end |
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134 | if increment and sessions[resource] then |
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135 | local count = 1; |
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136 | while sessions[resource.."#"..count] do |
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137 | count = count + 1; |
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138 | end |
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139 | resource = resource.."#"..count; |
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140 | end |
38 | 141 | end |
142 | end | |
143 | ||
144 | session.resource = resource; | |
145 | session.full_jid = session.username .. '@' .. session.host .. '/' .. resource; | |
146 | hosts[session.host].sessions[session.username].sessions[resource] = session; | |
147 | ||
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148 | session.roster = rm_load_roster(session.username, session.host); |
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149 | |
38 | 150 | return true; |
151 | end | |
152 | ||
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153 | function streamopened(session, attr) |
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154 | local send = session.send; |
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155 | session.host = attr.to or error("Client failed to specify destination hostname"); |
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156 | session.version = tonumber(attr.version) or 0; |
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157 | session.streamid = m_random(1000000, 99999999); |
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158 | (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host); |
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159 | |
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160 | |
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161 | send("<?xml version='1.0'?>"); |
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162 | 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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163 | |
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164 | if not hosts[session.host] then |
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165 | -- We don't serve this host... |
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166 | session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)}; |
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167 | return; |
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168 | end |
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169 | |
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170 | |
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171 | local features = st.stanza("stream:features"); |
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172 | modulemanager.fire_event("stream-features", session, features); |
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173 | |
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174 | send(features); |
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175 | |
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176 | (session.log or log)("info", "Sent reply <stream:stream> to client"); |
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177 | session.notopen = nil; |
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178 | end |
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179 | |
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180 | function send_to_available_resources(user, host, stanza) |
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181 | local count = 0; |
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182 | local to = stanza.attr.to; |
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183 | stanza.attr.to = nil; |
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184 | local h = hosts[host]; |
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185 | if h and h.type == "local" then |
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186 | local u = h.sessions[user]; |
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187 | if u then |
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188 | for k, session in pairs(u.sessions) do |
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189 | if session.presence then |
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190 | session.send(stanza); |
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191 | count = count + 1; |
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192 | end |
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193 | end |
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194 | end |
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195 | end |
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196 | stanza.attr.to = to; |
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197 | return count; |
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198 | end |
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199 | |
30 | 200 | return _M; |