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core/sessionmanager.lua @ 12820:b95771171439
sessionmanager: Pluck sasl_handler from old session when resuming (fixes #1785)
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 29 Dec 2022 16:23:08 +0000 |
parent | 12677:3b9771d496ed |
child | 12821:a4ac16e5b655 |
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 -- |
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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core: Allow select core modules to mutate some globals (needs luacheck 1.19)
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8 -- luacheck: globals prosody.full_sessions prosody.bare_sessions |
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9 |
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10 local tostring, setmetatable = tostring, setmetatable; |
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11 local pairs, next= pairs, next; |
38 | 12 |
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13 local prosody, hosts = prosody, prosody.hosts; |
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14 local full_sessions = prosody.full_sessions; |
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15 local bare_sessions = prosody.bare_sessions; |
38 | 16 |
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17 local logger = require "util.logger"; |
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18 local log = logger.init("sessionmanager"); |
101
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19 local rm_load_roster = require "core.rostermanager".load_roster; |
429
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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 generate_identifier = require "util.id".short; |
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24 local sessionlib = require "util.session"; |
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25 |
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26 local initialize_filters = require "util.filters".initialize; |
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27 local gettime = require "socket".gettime; |
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28 |
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29 local _ENV = nil; |
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30 -- luacheck: std none |
30 | 31 |
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32 local function new_session(conn) |
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33 local session = sessionlib.new("c2s"); |
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34 sessionlib.set_id(session); |
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35 sessionlib.set_logger(session); |
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36 sessionlib.set_conn(session, conn); |
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37 |
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38 session.conntime = gettime(); |
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39 local filter = initialize_filters(session); |
30 | 40 local w = conn.write; |
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41 |
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42 function session.rawsend(t) |
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43 t = filter("bytes/out", tostring(t)); |
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44 if t then |
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45 local ret, err = w(conn, t); |
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46 if not ret then |
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47 session.log("debug", "Error writing to connection: %s", err); |
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48 return false, err; |
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49 end |
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50 end |
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51 return true; |
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52 end |
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53 |
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54 session.send = function (t) |
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55 session.log("debug", "Sending[%s]: %s", session.type, t.top_tag and t:top_tag() or t:match("^[^>]*>?")); |
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56 if t.name then |
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57 t = filter("stanzas/out", t); |
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58 end |
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59 if t then |
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60 return session.rawsend(t); |
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61 end |
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62 return true; |
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63 end |
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64 session.ip = conn:ip(); |
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65 local conn_name = "c2s"..tostring(session):match("[a-f0-9]+$"); |
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66 session.log = logger.init(conn_name); |
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67 |
30 | 68 return session; |
69 end | |
70 | |
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71 local resting_session = { -- Resting, not dead |
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72 destroyed = true; |
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73 type = "c2s_destroyed"; |
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74 close = function (session) |
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75 session.log("debug", "Attempt to close already-closed session"); |
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76 end; |
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77 filter = function (type, data) return data; end; --luacheck: ignore 212/type |
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78 }; resting_session.__index = resting_session; |
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79 |
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80 local function retire_session(session) |
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81 local log = session.log or log; --luacheck: ignore 431/log |
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82 for k in pairs(session) do |
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83 if k ~= "log" and k ~= "id" then |
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84 session[k] = nil; |
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85 end |
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86 end |
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87 |
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88 function session.send(data) log("debug", "Discarding data sent to resting session: %s", data); return false; end |
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89 function session.rawsend(data) log("debug", "Discarding data sent to resting session: %s", data); return false; end |
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90 function session.data(data) log("debug", "Discarding data received from resting session: %s", data); end |
7286 | 91 session.thread = { run = function (_, data) return session.data(data) end }; |
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92 return setmetatable(session, resting_session); |
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93 end |
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94 |
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95 -- Update a session with a new one (transplanting connection, filters, etc.) |
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96 -- new_session should be discarded after this call returns |
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97 local function update_session(to_session, from_session) |
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98 to_session.log("debug", "Updating with parameters from session %s", from_session.id); |
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99 from_session.log("debug", "Session absorbed into %s", to_session.id); |
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100 |
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101 local replaced_conn = to_session.conn; |
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102 if replaced_conn then |
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103 to_session.log("debug", "closing a replaced connection for this session"); |
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104 replaced_conn:close(); |
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105 end |
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106 |
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107 to_session.ip = from_session.ip; |
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108 to_session.conn = from_session.conn; |
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109 to_session.rawsend = from_session.rawsend; |
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110 to_session.rawsend.session = to_session; |
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111 to_session.rawsend.conn = to_session.conn; |
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112 to_session.send = from_session.send; |
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113 to_session.send.session = to_session; |
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114 to_session.close = from_session.close; |
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115 to_session.filter = from_session.filter; |
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116 to_session.filter.session = to_session; |
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117 to_session.filters = from_session.filters; |
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118 to_session.send.filter = to_session.filter; |
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119 to_session.sasl_handler = from_session.sasl_handler; |
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120 to_session.stream = from_session.stream; |
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121 to_session.secure = from_session.secure; |
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122 to_session.hibernating = nil; |
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123 to_session.resumption_counter = (to_session.resumption_counter or 0) + 1; |
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124 from_session.log = to_session.log; |
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125 from_session.type = to_session.type; |
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126 -- Inform xmppstream of the new session (passed to its callbacks) |
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127 to_session.stream:set_session(to_session); |
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128 |
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129 -- Retire the session we've pulled from, to avoid two sessions on the same connection |
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130 retire_session(from_session); |
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131 |
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132 prosody.events.fire_event("c2s-session-updated", { |
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133 session = to_session; |
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134 from_session = from_session; |
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135 replaced_conn = replaced_conn; |
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136 }); |
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137 end |
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138 |
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139 local function destroy_session(session, err) |
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140 (session.log or log)("debug", "Destroying session for %s (%s@%s)%s", |
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141 session.full_jid or "(unknown)", session.username or "(unknown)", |
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142 session.host or "(unknown)", err and (": "..err) or ""); |
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143 |
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144 if session.destroyed then return; end |
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145 |
331 | 146 -- Remove session/resource from user's session list |
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147 if session.full_jid then |
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148 local host_session = hosts[session.host]; |
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149 |
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150 -- Allow plugins to prevent session destruction |
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151 if host_session.events.fire_event("pre-resource-unbind", {session=session, error=err}) then |
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152 return; |
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153 end |
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154 |
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155 host_session.sessions[session.username].sessions[session.resource] = nil; |
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156 full_sessions[session.full_jid] = nil; |
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157 |
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158 if not next(host_session.sessions[session.username].sessions) then |
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159 log("debug", "All resources of %s are now offline", session.username); |
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160 host_session.sessions[session.username] = nil; |
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161 bare_sessions[session.username..'@'..session.host] = nil; |
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162 end |
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163 |
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164 host_session.events.fire_event("resource-unbind", {session=session, error=err}); |
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165 end |
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166 |
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167 retire_session(session); |
38 | 168 end |
169 | |
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170 local function make_authenticated(session, username, role_name) |
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171 username = nodeprep(username); |
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172 if not username or #username == 0 then return nil, "Invalid username"; end |
38 | 173 session.username = username; |
174 if session.type == "c2s_unauthed" then | |
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175 session.type = "c2s_unbound"; |
38 | 176 end |
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177 |
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178 local role; |
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179 if role_name then |
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180 role = hosts[session.host].authz.get_role_by_name(role_name); |
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181 else |
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182 role = hosts[session.host].authz.get_user_role(username); |
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183 end |
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184 if role then |
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185 sessionlib.set_role(session, role); |
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186 end |
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187 session.log("info", "Authenticated as %s@%s [%s]", username, session.host or "(unknown)", role and role.name or "no role"); |
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188 return true; |
38 | 189 end |
190 | |
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191 -- returns true, nil on success |
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192 -- returns nil, err_type, err, err_message on failure |
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193 local function bind_resource(session, resource) |
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194 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end |
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195 if session.resource then return nil, "cancel", "not-allowed", "Cannot bind multiple resources on a single connection"; end |
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196 -- We don't support binding multiple resources |
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197 |
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198 local event_payload = { session = session, resource = resource }; |
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199 if hosts[session.host].events.fire_event("pre-resource-bind", event_payload) == false then |
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200 local err = event_payload.error; |
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201 if err then return nil, err.type, err.condition, err.text; end |
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202 return nil, "cancel", "not-allowed"; |
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203 else |
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204 -- In case a plugin wants to poke at it |
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205 resource = event_payload.resource; |
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206 end |
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207 |
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208 resource = resourceprep(resource or "", true); |
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209 resource = resource ~= "" and resource or generate_identifier(); |
38 | 210 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing |
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211 |
38 | 212 if not hosts[session.host].sessions[session.username] then |
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213 local sessions = { sessions = {} }; |
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214 hosts[session.host].sessions[session.username] = sessions; |
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215 bare_sessions[session.username..'@'..session.host] = sessions; |
38 | 216 else |
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217 local sessions = hosts[session.host].sessions[session.username].sessions; |
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218 if sessions[resource] then |
38 | 219 -- Resource conflict |
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220 local policy = config_get(session.host, "conflict_resolve"); |
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221 local increment; |
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222 if policy == "random" then |
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223 resource = generate_identifier(); |
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224 increment = true; |
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225 elseif policy == "increment" then |
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226 increment = true; -- TODO ping old resource |
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227 elseif policy == "kick_new" then |
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228 return nil, "cancel", "conflict", "Resource already exists"; |
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229 else -- if policy == "kick_old" then |
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230 sessions[resource]:close { |
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231 condition = "conflict"; |
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232 text = "Replaced by new connection"; |
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233 }; |
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234 if not next(sessions) then |
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235 hosts[session.host].sessions[session.username] = { sessions = sessions }; |
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236 bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username]; |
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237 end |
429
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238 end |
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239 if increment and sessions[resource] then |
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240 local count = 1; |
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241 while sessions[resource.."#"..count] do |
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242 count = count + 1; |
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243 end |
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244 resource = resource.."#"..count; |
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245 end |
38 | 246 end |
247 end | |
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248 |
38 | 249 session.resource = resource; |
250 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource; | |
251 hosts[session.host].sessions[session.username].sessions[resource] = session; | |
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252 full_sessions[session.full_jid] = session; |
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253 if session.type == "c2s_unbound" then |
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254 session.type = "c2s"; |
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255 end |
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256 |
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257 local err; |
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258 session.roster, err = rm_load_roster(session.username, session.host); |
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259 if err then |
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260 -- FIXME: Why is all this rollback down here, instead of just doing the roster test up above? |
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261 full_sessions[session.full_jid] = nil; |
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262 hosts[session.host].sessions[session.username].sessions[resource] = nil; |
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263 session.full_jid = nil; |
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264 session.resource = nil; |
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265 if session.type == "c2s" then |
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266 session.type = "c2s_unbound"; |
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267 end |
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268 if next(bare_sessions[session.username..'@'..session.host].sessions) == nil then |
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269 bare_sessions[session.username..'@'..session.host] = nil; |
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270 hosts[session.host].sessions[session.username] = nil; |
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271 end |
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272 session.log("error", "Roster loading failed: %s", err); |
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273 return nil, "cancel", "internal-server-error", "Error loading roster"; |
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274 end |
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275 |
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276 hosts[session.host].events.fire_event("resource-bind", {session=session}); |
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277 |
38 | 278 return true; |
279 end | |
280 | |
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281 local function send_to_available_resources(username, host, stanza) |
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282 local jid = username.."@"..host; |
176
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283 local count = 0; |
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284 local user = bare_sessions[jid]; |
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285 if user then |
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286 for _, session in pairs(user.sessions) do |
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287 if session.presence then |
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288 session.send(stanza); |
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289 count = count + 1; |
175
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290 end |
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291 end |
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292 end |
176
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293 return count; |
175
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294 end |
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295 |
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296 local function send_to_interested_resources(username, host, stanza) |
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297 local jid = username.."@"..host; |
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298 local count = 0; |
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299 local user = bare_sessions[jid]; |
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300 if user then |
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301 for _, session in pairs(user.sessions) do |
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302 if session.interested then |
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303 session.send(stanza); |
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304 count = count + 1; |
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305 end |
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306 end |
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307 end |
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308 return count; |
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309 end |
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310 |
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311 return { |
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312 new_session = new_session; |
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313 retire_session = retire_session; |
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mod_smacks: Long overdue cleanup of resumption code, fixes some old TODOs
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314 update_session = update_session; |
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315 destroy_session = destroy_session; |
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316 make_authenticated = make_authenticated; |
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317 bind_resource = bind_resource; |
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318 send_to_available_resources = send_to_available_resources; |
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319 send_to_interested_resources = send_to_interested_resources; |
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320 }; |