prosody
7ce502f21270
core/portmanager.lua

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core/portmanager.lua @ 4800:7ce502f21270

portmanager: Import ipairs (thanks Maranda)
author Matthew Wild <mwild1@gmail.com>
date Sun, 29 Apr 2012 19:31:44 +0100
parent 4789:bed0c6117358
child 4809:3068ec951ffd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 table, package = table, package;
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9 local setmetatable, rawset, rawget = setmetatable, rawset, rawget;
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10 local type, tonumber, ipairs = type, tonumber, ipairs;
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11
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12 local prosody = prosody;
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13 local fire_event = prosody.events.fire_event;
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14
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15 module "portmanager";
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16
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17 --- Config
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18
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19 local default_interfaces = { "*" };
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20 local default_local_interfaces = { "127.0.0.1" };
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21 if config.get("*", "use_ipv6") then
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22 table.insert(default_interfaces, "::");
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23 table.insert(default_local_interfaces, "::1");
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24 end
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25
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26 --- Private state
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27
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28 -- service_name -> { service_info, ... }
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29 local services = setmetatable({}, { __index = function (t, k) rawset(t, k, {}); return rawget(t, k); end });
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30
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31 -- service_name, interface (string), port (number)
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32 local active_services = multitable.new();
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33
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34 --- Private helpers
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35
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36 local function error_to_friendly_message(service_name, port, err)
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37 local friendly_message = err;
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38 if err:match(" in use") then
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39 -- FIXME: Use service_name here
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40 if port == 5222 or port == 5223 or port == 5269 then
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41 friendly_message = "check that Prosody or another XMPP server is "
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42 .."not already running and using this port";
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43 elseif port == 80 or port == 81 then
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44 friendly_message = "check that a HTTP server is not already using "
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45 .."this port";
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46 elseif port == 5280 then
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47 friendly_message = "check that Prosody or a BOSH connection manager "
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48 .."is not already running";
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49 else
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50 friendly_message = "this port is in use by another application";
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51 end
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52 elseif err:match("permission") then
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53 friendly_message = "Prosody does not have sufficient privileges to use this port";
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54 elseif err == "no ssl context" then
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55 if not config.get("*", "core", "ssl") then
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56 friendly_message = "there is no 'ssl' config under Host \"*\" which is "
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57 .."require for legacy SSL ports";
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58 else
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59 friendly_message = "initializing SSL support failed, see previous log entries";
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60 end
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61 end
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62 return friendly_message;
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63 end
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64
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65 prosody.events.add_handler("item-added/net-provider", function (event)
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66 local item = event.item;
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67 register_service(item.name, item);
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68 end);
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69 prosody.events.add_handler("item-removed/net-provider", function (event)
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70 local item = event.item;
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71 unregister_service(item.name, item);
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72 end);
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73
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74 --- Public API
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75
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76 function activate(service_name)
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77 local service_info = services[service_name][1];
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78 if not service_info then
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79 return nil, "Unknown service: "..service_name;
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80 end
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81
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82 local listener = service_info.listener;
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83
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84 local config_prefix = (service_info.config_prefix or service_name).."_";
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85 if config_prefix == "_" then
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86 config_prefix = "";
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87 end
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88
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89 local bind_interfaces = config.get("*", config_prefix.."interfaces")
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90 or config.get("*", config_prefix.."interface") -- COMPAT w/pre-0.9
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91 or (service_info.private and default_local_interfaces)
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92 or config.get("*", "interfaces")
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93 or config.get("*", "interface") -- COMPAT w/pre-0.9
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94 or listener.default_interface -- COMPAT w/pre0.9
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95 or default_interfaces
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96 bind_interfaces = set.new(type(bind_interfaces)~="table" and {bind_interfaces} or bind_interfaces);
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97
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98 local bind_ports = set.new(config.get("*", config_prefix.."ports")
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99 or service_info.default_ports
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100 or {service_info.default_port
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101 or listener.default_port -- COMPAT w/pre-0.9
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102 });
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103
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104 local mode = listener.default_mode or "*a";
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105 local ssl;
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106 if service_info.encryption == "ssl" then
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107 ssl = prosody.global_ssl_ctx;
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108 if not ssl then
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109 return nil, "global-ssl-context-required";
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110 end
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111 end
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112
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113 for interface in bind_interfaces do
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114 for port in bind_ports do
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115 port = tonumber(port);
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116 if #active_services:search(nil, interface, port) > 0 then
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117 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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118 else
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119 local handler, err = server.addserver(interface, port, listener, mode, ssl);
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120 if not handler then
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121 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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122 else
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123 log("debug", "Added listening service %s to [%s]:%d", service_name, interface, port);
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124 active_services:add(service_name, interface, port, {
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125 server = handler;
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126 service = service_info;
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127 });
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128 end
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129 end
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130 end
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131 end
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132 log("info", "Activated service '%s'", service_name);
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133 return true;
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134 end
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135
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136 function deactivate(service_name)
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137 local active = active_services:search(service_name)[1];
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138 if not active then return; end
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139 for interface, ports in pairs(active) do
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140 for port, active_service in pairs(ports) do
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141 close(interface, port);
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142 end
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143 end
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144 log("info", "Deactivated service '%s'", service_name);
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145 end
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146
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147 function register_service(service_name, service_info)
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148 table.insert(services[service_name], service_info);
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149
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150 if not active_services:get(service_name) then
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151 log("debug", "No active service for %s, activating...", service_name);
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152 local ok, err = activate(service_name);
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153 if not ok then
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154 log("error", "Failed to activate service '%s': %s", service_name, err or "unknown error");
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155 end
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156 end
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157
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158 fire_event("service-added", { name = service_name, service = service_info });
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159 return true;
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160 end
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161
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162 function unregister_service(service_name, service_info)
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163 local service_info_list = services[service_name];
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164 for i, service in ipairs(service_info_list) do
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165 if service == service_info then
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166 table.remove(service_info_list, i);
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167 end
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168 end
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169 if active_services[service_name] == service_info then
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170 deactivate(service_name);
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171 if #service_info_list > 0 then -- Other services registered with this name
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172 activate(service_name); -- Re-activate with the next available one
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173 end
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174 end
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175 fire_event("service-removed", { name = service_name, service = service_info });
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176 end
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177
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178 function close(interface, port)
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179 local service, server = get_service_at(interface, port);
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180 if not service then
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181 return false, "port-not-open";
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182 end
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183 server:close();
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184 active_services:remove(service.name, interface, port);
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185 log("debug", "Removed listening service %s from [%s]:%d", service.name, interface, port);
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186 return true;
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187 end
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188
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189 function get_service_at(interface, port)
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190 local data = active_services:search(nil, interface, port)[1][1];
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191 return data.service, data.server;
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192 end
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193
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194 function get_service(service_name)
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195 return services[service_name];
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196 end
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197
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198 function get_active_services(...)
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199 return active_services;
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200 end
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201
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202 function get_registered_services()
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203 return services;
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204 end
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205
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206 return _M;