prosody
0653476ac3a3
core/portmanager.lua

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core/portmanager.lua @ 4741:0653476ac3a3

portmanager: Explicitly import some libraries
author Matthew Wild <mwild1@gmail.com>
date Sat, 28 Apr 2012 01:27:02 +0100
parent 4687:bd3a852b949a
child 4742:23c2ece2c8bc
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4741
0653476ac3a3 portmanager: Explicitly import some libraries
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1 local config = require "core.configmanager";
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2 local server = require "net.server";
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3
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4 local log = require "util.logger".init("portmanager");
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5 local multitable = require "util.multitable";
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6 local set = require "util.set";
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7
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8 local prosody = prosody;
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9 local fire_event = prosody.events.fire_event;
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10
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11 --- Config
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12
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13 local default_interfaces = { "*" };
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14 local default_local_interfaces = { "127.0.0.1" };
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15 if config.get("*", "use_ipv6") then
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16 table.insert(default_interfaces, "::");
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17 table.insert(default_local_interfaces, "::1");
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18 end
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19
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20 --- Private state
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21
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22 -- service_name -> { service_info, ... }
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23 local services = setmetatable({}, { __index = function (t, k) rawset(t, k, {}); return rawget(t, k); end });
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24
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25 -- service_name, interface (string), port (number)
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26 local active_services = multitable.new();
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27
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28 --- Private helpers
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29
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30 local function error_to_friendly_message(service_name, port, err)
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31 local friendly_message = err;
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32 if err:match(" in use") then
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33 -- FIXME: Use service_name here
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34 if port == 5222 or port == 5223 or port == 5269 then
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35 friendly_message = "check that Prosody or another XMPP server is "
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36 .."not already running and using this port";
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37 elseif port == 80 or port == 81 then
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38 friendly_message = "check that a HTTP server is not already using "
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39 .."this port";
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40 elseif port == 5280 then
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41 friendly_message = "check that Prosody or a BOSH connection manager "
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42 .."is not already running";
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43 else
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44 friendly_message = "this port is in use by another application";
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45 end
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46 elseif err:match("permission") then
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47 friendly_message = "Prosody does not have sufficient privileges to use this port";
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48 elseif err == "no ssl context" then
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49 if not config.get("*", "core", "ssl") then
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50 friendly_message = "there is no 'ssl' config under Host \"*\" which is "
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51 .."require for legacy SSL ports";
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52 else
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53 friendly_message = "initializing SSL support failed, see previous log entries";
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54 end
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55 end
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56 return friendly_message;
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57 end
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58
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59 module("portmanager", package.seeall);
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60
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61 prosody.events.add_handler("item-added/net-provider", function (event)
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62 local item = event.item;
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63 register_service(item.name, item);
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64 end);
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65 prosody.events.add_handler("item-removed/net-provider", function (event)
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66 local item = event.item;
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67 unregister_service(item.name, item);
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68 end);
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69
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70 --- Public API
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71
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72 function activate_service(service_name)
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73 local service_info = services[service_name][1];
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74 if not service_info then
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75 return nil, "Unknown service: "..service_name;
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76 end
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77
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78 local listener = service_info.listener;
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79
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80 local config_prefix = (service_info.config_prefix or service_name).."_";
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81 if config_prefix == "_" then
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82 config_prefix = "";
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83 end
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84
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85 local bind_interfaces = config.get("*", config_prefix.."interfaces")
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86 or config.get("*", config_prefix.."interface") -- COMPAT w/pre-0.9
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87 or (service_info.private and default_local_interfaces)
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88 or config.get("*", "interfaces")
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89 or config.get("*", "interface") -- COMPAT w/pre-0.9
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90 or listener.default_interface -- COMPAT w/pre0.9
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91 or default_interfaces
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92 bind_interfaces = set.new(type(bind_interfaces)~="table" and {bind_interfaces} or bind_interfaces);
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93
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94 local bind_ports = set.new(config.get("*", config_prefix.."ports")
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95 or service_info.default_ports
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96 or {service_info.default_port
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97 or listener.default_port -- COMPAT w/pre-0.9
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98 });
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99
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100 local mode = listener.default_mode or "*a";
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101 local ssl;
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102 if service_info.encryption == "ssl" then
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103 ssl = prosody.global_ssl_ctx;
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104 if not ssl then
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105 return nil, "global-ssl-context-required";
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106 end
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107 end
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108
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109 for interface in bind_interfaces do
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110 for port in bind_ports do
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111 if #active_services:search(nil, interface, port) > 0 then
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112 log("error", "Multiple services configured to listen on the same port ([%s]:%d): %s, %s", interface, port, active_services:search(nil, interface, port)[1][1].service.name or "<unnamed>", service_name or "<unnamed>");
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113 else
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114 local handler, err = server.addserver(interface, port, listener, mode, ssl);
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115 if not handler then
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116 log("error", "Failed to open server port %d on %s, %s", port, interface, error_to_friendly_message(service_name, port, err));
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117 else
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118 log("debug", "Added listening service %s to [%s]:%d", service_name, interface, port);
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119 active_services:add(service_name, interface, port, {
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120 server = handler;
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121 service = service_info;
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122 });
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123 end
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124 end
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125 end
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126 end
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127 log("info", "Activated service '%s'", service_name);
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128 return true;
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129 end
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130
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131 function deactivate(service_name)
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132 local active = active_services:search(service_name)[1];
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133 if not active then return; end
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134 for interface, ports in pairs(active) do
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135 for port, active_service in pairs(ports) do
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136 close(interface, port);
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137 end
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138 end
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139 log("info", "Deactivated service '%s'", service_name);
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140 end
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141
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142 function register_service(service_name, service_info)
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143 table.insert(services[service_name], service_info);
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144
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145 if not active_services:get(service_name) then
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146 log("debug", "No active service for %s, activating...", service_name);
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147 local ok, err = activate_service(service_name);
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148 if not ok then
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149 log("error", "Failed to activate service '%s': %s", service_name, err or "unknown error");
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150 end
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151 end
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152
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153 fire_event("service-added", { name = service_name, service = service_info });
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154 return true;
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155 end
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156
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157 function unregister_service(service_name, service_info)
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158 local service_info_list = services[service_name];
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159 for i, service in ipairs(service_info_list) do
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160 if service == service_info then
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161 table.remove(service_info_list, i);
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162 end
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163 end
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164 if active_services[service_name] == service_info then
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165 deactivate(service_name);
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166 if #service_info_list > 0 then -- Other services registered with this name
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167 activate(service_name); -- Re-activate with the next available one
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168 end
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169 end
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170 fire_event("service-removed", { name = service_name, service = service_info });
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171 end
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172
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173 function close(interface, port)
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174 local service, server = get_service_at(interface, port);
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175 if not service then
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176 return false, "port-not-open";
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177 end
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178 server:close();
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179 active_services:remove(service.name, interface, port);
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180 log("debug", "Removed listening service %s from [%s]:%d", service.name, interface, port);
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181 return true;
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182 end
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183
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184 function get_service_at(interface, port)
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185 local data = active_services:search(nil, interface, port)[1][1];
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186 return data.service, data.server;
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187 end
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188
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189 function get_service(service_name)
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190 return services[service_name];
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191 end
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192
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193 function get_active_services(...)
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194 return active_services;
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195 end
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196
4618
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197 function get_registered_services()
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198 return services;
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199 end
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200
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201 return _M;