Fri, 29 May 2009 23:01:05 +0500
sessionmanager: Added reference to globals full_sessions and bare_sessions
894 | 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 | -- |
758 | 5 | -- This project is MIT/X11 licensed. Please see the |
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 | |
30 | 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"); |
38 | 16 | |
17 | local hosts = hosts; | |
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18 | local full_sessions = full_sessions; |
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19 | local bare_sessions = bare_sessions; |
38 | 20 | |
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21 | local modulemanager = require "core.modulemanager"; |
30 | 22 | local log = require "util.logger".init("sessionmanager"); |
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23 | local error = error; |
145 | 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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30 | |
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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 | |
30 | 38 | module "sessionmanager" |
39 | ||
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40 | local open_sessions = 0; |
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41 | |
30 | 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); |
30 | 50 | local w = conn.write; |
51 | session.send = function (t) w(tostring(t)); end | |
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52 | session.ip = conn.ip(); |
30 | 53 | return session; |
54 | end | |
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)"); |
331 | 58 | |
59 | -- Send unavailable presence | |
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60 | if session.presence then |
331 | 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); |
331 | 65 | end |
66 | ||
67 | -- Remove session/resource from user's session list | |
148 | 68 | if session.host and session.username then |
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69 | -- FIXME: How can the below ever be nil? (but they sometimes are...) |
148 | 70 | if hosts[session.host] and hosts[session.host].sessions[session.username] then |
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71 | if session.resource then |
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72 | hosts[session.host].sessions[session.username].sessions[session.resource] = nil; |
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73 | end |
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74 | |
148 | 75 | if not next(hosts[session.host].sessions[session.username].sessions) then |
76 | log("debug", "All resources of %s are now offline", session.username); | |
77 | hosts[session.host].sessions[session.username] = nil; | |
78 | end | |
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79 | else |
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80 | log("error", "host or session table didn't exist, please report this! Host: %s [%s] Sessions: %s [%s]", |
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81 | tostring(hosts[session.host]), tostring(session.host), |
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82 | tostring(hosts[session.host].sessions[session.username] ), tostring(session.username)); |
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83 | end |
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84 | end |
331 | 85 | |
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86 | for k in pairs(session) do |
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87 | if k ~= "trace" then |
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88 | session[k] = nil; |
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89 | end |
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90 | end |
38 | 91 | end |
92 | ||
93 | function make_authenticated(session, username) | |
94 | session.username = username; | |
95 | if session.type == "c2s_unauthed" then | |
96 | session.type = "c2s"; | |
97 | end | |
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98 | session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)"); |
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99 | return true; |
38 | 100 | end |
101 | ||
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102 | -- returns true, nil on success |
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103 | -- returns nil, err_type, err, err_message on failure |
38 | 104 | function bind_resource(session, resource) |
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105 | if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end |
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106 | if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end |
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107 | -- We don't support binding multiple resources |
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108 | |
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109 | resource = resource or uuid_generate(); |
38 | 110 | --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing |
111 | ||
112 | if not hosts[session.host].sessions[session.username] then | |
113 | hosts[session.host].sessions[session.username] = { sessions = {} }; | |
114 | else | |
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115 | local sessions = hosts[session.host].sessions[session.username].sessions; |
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116 | local limit = config_get(session.host, "core", "max_resources") or 10; |
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117 | if #sessions >= limit then |
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118 | return nil, "cancel", "conflict", "Resource limit reached; only "..limit.." resources allowed"; |
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119 | end |
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120 | if sessions[resource] then |
38 | 121 | -- Resource conflict |
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122 | local policy = config_get(session.host, "core", "conflict_resolve"); |
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123 | local increment; |
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124 | if policy == "random" then |
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125 | resource = uuid_generate(); |
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126 | increment = true; |
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127 | elseif policy == "increment" then |
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128 | increment = true; -- TODO ping old resource |
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129 | elseif policy == "kick_new" then |
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130 | return nil, "cancel", "conflict", "Resource already exists"; |
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131 | else -- if policy == "kick_old" then |
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132 | sessions[resource]:close { |
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133 | condition = "conflict"; |
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134 | text = "Replaced by new connection"; |
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135 | }; |
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136 | if not next(sessions) then |
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137 | hosts[session.host].sessions[session.username] = { sessions = sessions }; |
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138 | end |
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139 | end |
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140 | if increment and sessions[resource] then |
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141 | local count = 1; |
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142 | while sessions[resource.."#"..count] do |
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143 | count = count + 1; |
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144 | end |
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145 | resource = resource.."#"..count; |
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146 | end |
38 | 147 | end |
148 | end | |
149 | ||
150 | session.resource = resource; | |
151 | session.full_jid = session.username .. '@' .. session.host .. '/' .. resource; | |
152 | hosts[session.host].sessions[session.username].sessions[resource] = session; | |
153 | ||
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154 | session.roster = rm_load_roster(session.username, session.host); |
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155 | |
38 | 156 | return true; |
157 | end | |
158 | ||
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159 | function streamopened(session, attr) |
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160 | local send = session.send; |
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161 | session.host = attr.to or error("Client failed to specify destination hostname"); |
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162 | session.host = nameprep(session.host); |
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163 | session.version = tonumber(attr.version) or 0; |
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164 | session.streamid = m_random(1000000, 99999999); |
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165 | (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host); |
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166 | |
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167 | send("<?xml version='1.0'?>"); |
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168 | 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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169 | |
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170 | if not hosts[session.host] then |
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171 | -- We don't serve this host... |
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172 | session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)}; |
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173 | return; |
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174 | end |
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175 | |
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176 | -- If session.secure is *false* (not nil) then it means we /were/ encrypting |
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177 | -- since we now have a new stream header, session is secured |
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178 | if session.secure == false then |
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179 | session.secure = true; |
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180 | end |
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181 | |
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182 | local features = st.stanza("stream:features"); |
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183 | fire_event("stream-features", session, features); |
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184 | |
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185 | send(features); |
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186 | |
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187 | (session.log or log)("debug", "Sent reply <stream:stream> to client"); |
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188 | session.notopen = nil; |
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189 | end |
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190 | |
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191 | function streamclosed(session) |
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192 | session.send("</stream:stream>"); |
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193 | session.notopen = true; |
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194 | end |
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195 | |
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196 | function send_to_available_resources(user, host, stanza) |
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197 | local count = 0; |
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198 | local to = stanza.attr.to; |
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199 | stanza.attr.to = nil; |
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200 | local h = hosts[host]; |
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201 | if h and h.type == "local" then |
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202 | local u = h.sessions[user]; |
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203 | if u then |
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204 | for k, session in pairs(u.sessions) do |
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205 | if session.presence then |
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206 | session.send(stanza); |
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207 | count = count + 1; |
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208 | end |
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209 | end |
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210 | end |
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211 | end |
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212 | stanza.attr.to = to; |
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213 | return count; |
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214 | end |
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215 | |
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216 | return _M; |