prosody
29a9988c1e1b
core/portmanager.lua

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core/portmanager.lua @ 4615:29a9988c1e1b

portmanager: Allow services to specify their config option prefix
author Matthew Wild <mwild1@gmail.com>
date Thu, 15 Mar 2012 02:56:44 +0000
parent 4612:8bb93860fe46
child 4616:03d9fe1bcdd3
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1
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2 local multitable = require "util.multitable";
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3 local fire_event = prosody.events.fire_event;
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4
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5 --- Config
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6
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7 local default_interfaces = { "*" };
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8 local default_local_interfaces = { "127.0.0.1" };
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9 if config.get("*", "use_ipv6") then
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10 table.insert(default_interfaces, "::");
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11 table.insert(default_local_interfaces, "::1");
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12 end
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13
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14 --- Private state
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15
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16 -- service_name -> { service_info, ... }
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17 local services = setmetatable({}, { __index = function (t, k) rawset(t, k, {}); return rawget(t, k); end });
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18
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19 -- service_name, interface (string), port (number)
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20 local active_services = multitable.new();
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21
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22 --- Private helpers
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23
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24 local function error_to_friendly_message(service_name, port, err)
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25 local friendly_message = err;
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26 if err:match(" in use") then
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27 -- FIXME: Use service_name here
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28 if port == 5222 or port == 5223 or port == 5269 then
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29 friendly_message = "check that Prosody or another XMPP server is "
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30 .."not already running and using this port";
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31 elseif port == 80 or port == 81 then
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32 friendly_message = "check that a HTTP server is not already using "
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33 .."this port";
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34 elseif port == 5280 then
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35 friendly_message = "check that Prosody or a BOSH connection manager "
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36 .."is not already running";
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37 else
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38 friendly_message = "this port is in use by another application";
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39 end
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40 elseif err:match("permission") then
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41 friendly_message = "Prosody does not have sufficient privileges to use this port";
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42 elseif err == "no ssl context" then
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43 if not config.get("*", "core", "ssl") then
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44 friendly_message = "there is no 'ssl' config under Host \"*\" which is "
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45 .."require for legacy SSL ports";
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46 else
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47 friendly_message = "initializing SSL support failed, see previous log entries";
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48 end
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49 end
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50 return friendly_message;
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51 end
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52
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53 module("portmanager", package.seeall);
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54
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55 prosody.events.add_handler("item-added/net-provider", function (event)
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56 local item = event.item;
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57 register_service(item.name, item);
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58 end);
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59 prosody.events.add_handler("item-removed/net-provider", function (event)
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60 local item = event.item;
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61 unregister_service(item.name, item);
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62 end);
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63
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64 --- Public API
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65
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66 function activate_service(service_name)
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67 local service_info = services[service_name][1];
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68 if not service_info then
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69 return nil, "Unknown service: "..service_name;
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70 end
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71
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72 local config_prefix = (service_info.config_prefix or service_name).."_";
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73 if config_prefix == "_" then
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74 config_prefix = "";
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75 end
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76
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77 local bind_interfaces = set.new(config.get("*", config_prefix.."interfaces")
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78 or config.get("*", config_prefix.."interface") -- COMPAT w/pre-0.9
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79 or (service_info.private and default_local_interfaces)
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80 or config.get("*", "interfaces")
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81 or config.get("*", "interface") -- COMPAT w/pre-0.9
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82 or service_info.default_interface -- COMPAT w/pre0.9
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83 or default_interfaces);
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84
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85 or service_info.default_ports
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86 or {service_info.default_port});
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87 local bind_ports = set.new(config.get("*", config_prefix.."ports")
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88
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89 local listener = service_info.listener;
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90 local mode = listener.default_mode or "*a";
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91 local ssl;
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92 if service_info.encryption == "ssl" then
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93 ssl = prosody.global_ssl_ctx;
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94 if not ssl then
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95 return nil, "global-ssl-context-required";
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96 end
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97 end
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98
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99 for interface in bind_interfaces do
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100 for port in bind_ports do
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101 if not service_info.multiplex and #active_services:search(nil, interface, port) > 0 then
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102 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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103 else
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104 local handler, err = server.addserver(interface, port, listener, mode, ssl);
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105 if not handler then
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106 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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107 else
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108 log("debug", "Added listening service %s to [%s]:%d", service_name, interface, port);
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109 active_services:add(service_name, interface, port, {
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110 server = handler;
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111 service = service_info;
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112 });
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113 end
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114 end
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115 end
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116 end
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117 log("info", "Activated service '%s'", service_name);
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118 return true;
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119 end
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120
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121 function deactivate(service_name)
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122 local active = active_services:search(service_name)[1];
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123 if not active then return; end
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124 for interface, ports in pairs(active) do
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125 for port, active_service in pairs(ports) do
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126 active_service:close();
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127 active_services:remove(service_name, interface, port, active_service);
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128 log("debug", "Removed listening service %s from [%s]:%d", service_name, interface, port);
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129 end
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130 end
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131 log("info", "Deactivated service '%s'", service_name);
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132 end
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133
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134 function register_service(service_name, service_info)
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135 table.insert(services[service_name], service_info);
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136
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137 if not active_services:get(service_name) then
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138 log("debug", "No active service for %s, activating...", service_name);
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139 local ok, err = activate_service(service_name);
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140 if not ok then
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141 log("error", "Failed to activate service '%s': %s", service_name, err or "unknown error");
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142 end
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143 end
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144
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145 fire_event("service-added", { name = service_name, service = service_info });
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146 return true;
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147 end
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148
4607
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149 function unregister_service(service_name, service_info)
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150 local service_info_list = services[service_name];
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151 for i, service in ipairs(service_info_list) do
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152 if service == service_info then
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153 table.remove(service_info_list, i);
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154 end
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155 end
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156 if active_services[service_name] == service_info then
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157 deactivate(service_name);
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158 if #service_info_list > 0 then -- Other services registered with this name
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159 activate(service_name); -- Re-activate with the next available one
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160 end
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161 end
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162 fire_event("service-removed", { name = service_name, service = service_info });
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163 end
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164
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165 function get_service(service_name)
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166 return services[service_name];
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167 end
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168
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169 function get_active_services(...)
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170 return active_services;
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171 end
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172
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173 return _M;