Thu, 27 Nov 2008 17:12:05 +0000
Merge from waqas
30 | 1 | |
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2 | local tonumber, tostring = tonumber, tostring; |
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3 | local ipairs, pairs, print, next= ipairs, pairs, print, next; |
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4 | local collectgarbage = collectgarbage; |
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5 | local m_random = import("math", "random"); |
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6 | local format = import("string", "format"); |
38 | 7 | |
8 | local hosts = hosts; | |
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9 | local sessions = sessions; |
38 | 10 | |
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11 | local modulemanager = require "core.modulemanager"; |
30 | 12 | local log = require "util.logger".init("sessionmanager"); |
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13 | local error = error; |
145 | 14 | local uuid_generate = require "util.uuid".generate; |
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15 | local rm_load_roster = require "core.rostermanager".load_roster; |
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16 | local config_get = require "core.configmanager".get; |
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17 | |
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18 | local st = require "util.stanza"; |
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19 | |
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20 | local newproxy = newproxy; |
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21 | local getmetatable = getmetatable; |
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22 | |
30 | 23 | module "sessionmanager" |
24 | ||
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25 | local open_sessions = 0; |
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26 | |
30 | 27 | function new_session(conn) |
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28 | local session = { conn = conn, priority = 0, type = "c2s_unauthed" }; |
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29 | if true then |
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30 | session.trace = newproxy(true); |
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31 | 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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32 | end |
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33 | open_sessions = open_sessions + 1; |
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34 | log("info", "open sessions now: ".. open_sessions); |
30 | 35 | local w = conn.write; |
36 | session.send = function (t) w(tostring(t)); end | |
37 | return session; | |
38 | end | |
39 | ||
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40 | function destroy_session(session, err) |
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41 | (session.log or log)("info", "Destroying session"); |
331 | 42 | |
43 | -- Send unavailable presence | |
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44 | if session.presence then |
331 | 45 | local pres = st.presence{ type = "unavailable" }; |
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46 | if (not err) or err == "closed" then err = "connection closed"; end |
331 | 47 | pres:tag("status"):text("Disconnected: "..err); |
48 | session.stanza_dispatch(pres); | |
49 | end | |
50 | ||
51 | -- Remove session/resource from user's session list | |
148 | 52 | if session.host and session.username then |
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53 | if session.resource then |
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54 | hosts[session.host].sessions[session.username].sessions[session.resource] = nil; |
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55 | end |
148 | 56 | if hosts[session.host] and hosts[session.host].sessions[session.username] then |
57 | if not next(hosts[session.host].sessions[session.username].sessions) then | |
58 | log("debug", "All resources of %s are now offline", session.username); | |
59 | hosts[session.host].sessions[session.username] = nil; | |
60 | end | |
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61 | end |
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62 | end |
331 | 63 | |
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64 | for k in pairs(session) do |
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65 | if k ~= "trace" then |
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66 | session[k] = nil; |
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67 | end |
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68 | end |
38 | 69 | end |
70 | ||
71 | function make_authenticated(session, username) | |
72 | session.username = username; | |
73 | if session.type == "c2s_unauthed" then | |
74 | session.type = "c2s"; | |
75 | end | |
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76 | return true; |
38 | 77 | end |
78 | ||
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79 | -- returns true, nil on success |
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80 | -- returns nil, err_type, err, err_message on failure |
38 | 81 | function bind_resource(session, resource) |
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82 | if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end |
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83 | if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end |
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84 | -- We don't support binding multiple resources |
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85 | |
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86 | resource = resource or uuid_generate(); |
38 | 87 | --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing |
88 | ||
89 | if not hosts[session.host].sessions[session.username] then | |
90 | hosts[session.host].sessions[session.username] = { sessions = {} }; | |
91 | else | |
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92 | local sessions = hosts[session.host].sessions[session.username].sessions; |
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93 | local limit = config_get(session.host, "core", "max_resources") or 10; |
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94 | if #sessions >= limit then |
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95 | return nil, "cancel", "conflict", "Resource limit reached; only "..limit.." resources allowed"; |
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96 | end |
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97 | if sessions[resource] then |
38 | 98 | -- Resource conflict |
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99 | local policy = config_get(session.host, "core", "conflict_resolve"); |
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100 | local increment; |
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101 | if policy == "random" then |
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102 | resource = uuid_generate(); |
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103 | increment = true; |
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104 | elseif policy == "increment" then |
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105 | increment = true; -- TODO ping old resource |
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106 | elseif policy == "kick_new" then |
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107 | return nil, "cancel", "conflict", "Resource already exists"; |
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108 | else -- if policy == "kick_old" then |
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109 | hosts[session.host].sessions[session.username].sessions[resource]:close { |
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110 | condition = "conflict"; |
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111 | text = "Replaced by new connection"; |
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112 | }; |
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113 | end |
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114 | if increment and sessions[resource] then |
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115 | local count = 1; |
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116 | while sessions[resource.."#"..count] do |
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117 | count = count + 1; |
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118 | end |
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119 | resource = resource.."#"..count; |
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120 | end |
38 | 121 | end |
122 | end | |
123 | ||
124 | session.resource = resource; | |
125 | session.full_jid = session.username .. '@' .. session.host .. '/' .. resource; | |
126 | hosts[session.host].sessions[session.username].sessions[resource] = session; | |
127 | ||
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128 | session.roster = rm_load_roster(session.username, session.host); |
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129 | |
38 | 130 | return true; |
131 | end | |
132 | ||
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133 | function streamopened(session, attr) |
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134 | local send = session.send; |
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135 | session.host = attr.to or error("Client failed to specify destination hostname"); |
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136 | session.version = tonumber(attr.version) or 0; |
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137 | session.streamid = m_random(1000000, 99999999); |
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138 | (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host); |
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139 | |
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140 | |
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141 | send("<?xml version='1.0'?>"); |
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142 | 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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143 | |
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144 | if not hosts[session.host] then |
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145 | -- We don't serve this host... |
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146 | session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)}; |
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147 | return; |
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148 | end |
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149 | |
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150 | |
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151 | local features = st.stanza("stream:features"); |
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152 | modulemanager.fire_event("stream-features", session, features); |
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153 | |
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154 | send(features); |
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155 | |
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156 | (session.log or log)("info", "Sent reply <stream:stream> to client"); |
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157 | session.notopen = nil; |
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158 | end |
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159 | |
175
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160 | function send_to_available_resources(user, host, stanza) |
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161 | local count = 0; |
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162 | local to = stanza.attr.to; |
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163 | stanza.attr.to = nil; |
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164 | local h = hosts[host]; |
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165 | if h and h.type == "local" then |
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166 | local u = h.sessions[user]; |
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167 | if u then |
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168 | for k, session in pairs(u.sessions) do |
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169 | if session.presence then |
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170 | session.send(stanza); |
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171 | count = count + 1; |
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172 | end |
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173 | end |
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174 | end |
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175 | end |
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176 | stanza.attr.to = to; |
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177 | return count; |
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178 | end |
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179 | |
30 | 180 | return _M; |