prosody
82b17b199d68
core/componentmanager.lua

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core/componentmanager.lua @ 3317:82b17b199d68

mod_privacy: Add service discovery feature.
author Waqas Hussain <waqas20@gmail.com>
date Sat, 03 Jul 2010 11:03:06 +0500
parent 2925:692b3c6c5bd2
child 3435:6cb971a31397
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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diff changeset
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 --
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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 local prosody = _G.prosody;
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10 local log = require "util.logger".init("componentmanager");
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11 local certmanager = require "core.certmanager";
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12 local configmanager = require "core.configmanager";
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13 local modulemanager = require "core.modulemanager";
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14 local jid_split = require "util.jid".split;
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15 local fire_event = require "core.eventmanager".fire_event;
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16 local events_new = require "util.events".new;
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17 local st = require "util.stanza";
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18 local prosody, hosts = prosody, prosody.hosts;
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19 local ssl = ssl;
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20 local uuid_gen = require "util.uuid".generate;
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21
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22 local pairs, setmetatable, type, tostring = pairs, setmetatable, type, tostring;
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23
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24 local components = {};
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25
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26 local disco_items = require "util.multitable".new();
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27 local NULL = {};
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28
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29 module "componentmanager"
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30
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31 local function default_component_handler(origin, stanza)
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32 log("warn", "Stanza being handled by default component; bouncing error for: %s", stanza:top_tag());
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33 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
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34 origin.send(st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable"));
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35 end
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36 end
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37
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38 function load_enabled_components(config)
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39 local defined_hosts = config or configmanager.getconfig();
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40
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41 for host, host_config in pairs(defined_hosts) do
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42 if host ~= "*" and ((host_config.core.enabled == nil or host_config.core.enabled) and type(host_config.core.component_module) == "string") then
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43 hosts[host] = create_component(host);
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44 hosts[host].connected = false;
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45 components[host] = default_component_handler;
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46 local ok, err = modulemanager.load(host, host_config.core.component_module);
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47 if not ok then
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48 log("error", "Error loading %s component %s: %s", tostring(host_config.core.component_module), tostring(host), tostring(err));
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49 else
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50 fire_event("component-activated", host, host_config);
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51 log("debug", "Activated %s component: %s", host_config.core.component_module, host);
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52 end
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53 end
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54 end
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55 end
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56
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57 if prosody and prosody.events then
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58 prosody.events.add_handler("server-starting", load_enabled_components);
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59 end
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60
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61 function handle_stanza(origin, stanza)
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62 local node, host = jid_split(stanza.attr.to);
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63 local component = nil;
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64 if host then
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65 if node then component = components[node.."@"..host]; end -- hack to allow hooking node@server
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66 if not component then component = components[host]; end
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67 end
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68 if component then
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69 log("debug", "%s stanza being handled by component: %s", stanza.name, host);
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70 component(origin, stanza, hosts[host]);
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71 else
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72 log("error", "Component manager recieved a stanza for a non-existing component: "..tostring(stanza));
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73 default_component_handler(origin, stanza);
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74 end
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75 end
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76
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77 function create_component(host, component, events)
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78 -- TODO check for host well-formedness
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79 local ssl_ctx, ssl_ctx_in;
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80 if host and ssl then
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81 -- We need to find SSL context to use...
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82 -- Discussion in prosody@ concluded that
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83 -- 1 level back is usually enough by default
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84 local base_host = host:gsub("^[^%.]+%.", "");
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85 if hosts[base_host] then
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86 ssl_ctx = hosts[base_host].ssl_ctx;
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87 ssl_ctx_in = hosts[base_host].ssl_ctx_in;
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88 else
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89 -- We have no cert, and no parent host to borrow a cert from
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90 -- Use global/default cert if there is one
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91 ssl_ctx = certmanager.create_context(host, "client");
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92 ssl_ctx_in = certmanager.create_context(host, "server");
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93 end
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94 end
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95 return { type = "component", host = host, connected = true, s2sout = {},
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96 ssl_ctx = ssl_ctx, ssl_ctx_in = ssl_ctx_in, events = events or events_new(),
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97 dialback_secret = configmanager.get(host, "core", "dialback_secret") or uuid_gen() };
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98 end
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99
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100 function register_component(host, component, session)
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101 if not hosts[host] or (hosts[host].type == 'component' and not hosts[host].connected) then
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102 local old_events = hosts[host] and hosts[host].events;
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103
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104 components[host] = component;
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105 hosts[host] = session or create_component(host, component, old_events);
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106
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107 -- Add events object if not already one
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108 if not hosts[host].events then
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109 hosts[host].events = old_events or events_new();
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110 end
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111
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112 if not hosts[host].dialback_secret then
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113 hosts[host].dialback_secret = configmanager.get(host, "core", "dialback_secret") or uuid_gen();
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114 end
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115
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116 -- add to disco_items
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117 if not(host:find("@", 1, true) or host:find("/", 1, true)) and host:find(".", 1, true) then
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118 disco_items:set(host:sub(host:find(".", 1, true)+1), host, true);
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119 end
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120 modulemanager.load(host, "dialback");
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121 modulemanager.load(host, "tls");
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122 log("debug", "component added: "..host);
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123 return session or hosts[host];
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124 else
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125 log("error", "Attempt to set component for existing host: "..host);
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126 end
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127 end
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128
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129 function deregister_component(host)
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130 if components[host] then
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ed4cd15bf4dd componentmanager: Unload mod_tls for components before removing them.
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131 modulemanager.unload(host, "tls");
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132 modulemanager.unload(host, "dialback");
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133 hosts[host].connected = nil;
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134 local host_config = configmanager.getconfig()[host];
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135 if host_config and ((host_config.core.enabled == nil or host_config.core.enabled) and type(host_config.core.component_module) == "string") then
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136 -- Set default handler
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137 components[host] = default_component_handler;
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138 else
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139 -- Component not in config, or disabled, remove
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bbaba17537a9 componentmanager: Added a FIXME comment.
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140 hosts[host] = nil; -- FIXME do proper unload of all modules and other cleanup before removing
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141 components[host] = nil;
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142 end
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143 -- remove from disco_items
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144 if not(host:find("@", 1, true) or host:find("/", 1, true)) and host:find(".", 1, true) then
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145 disco_items:remove(host:sub(host:find(".", 1, true)+1), host);
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146 end
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147 log("debug", "component removed: "..host);
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148 return true;
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149 else
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150 log("error", "Attempt to remove component for non-existing host: "..host);
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151 end
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152 end
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153
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154 function set_component_handler(host, handler)
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155 components[host] = handler;
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156 end
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157
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diff changeset
158 function get_children(host)
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159 return disco_items:get(host) or NULL;
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160 end
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161
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162 return _M;