prosody
01d52f31b6b3
core/portmanager.lua

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core/portmanager.lua @ 4608:01d52f31b6b3

portmanager: Support item-added/net-provider (global and shared modules only!)
author Matthew Wild <mwild1@gmail.com>
date Wed, 14 Mar 2012 21:39:45 +0000
parent 4607:7f45b2cb3c03
child 4609:83a5377ffea2
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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 bind_interfaces = set.new(config.get("*", service_name.."_interfaces")
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73 or config.get("*", service_name.."_interface") -- COMPAT w/pre-0.9
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74 or (service_info.private and default_local_interfaces)
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75 or config.get("*", "interfaces")
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76 or config.get("*", "interface") -- COMPAT w/pre-0.9
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77 or service_info.default_interface -- COMPAT w/pre0.9
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78 or default_interfaces);
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79
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80 local bind_ports = set.new(config.get("*", service_name.."_ports")
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81 or (service_info.multiplex and config.get("*", "ports"))
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82 or service_info.default_ports
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83 or {service_info.default_port});
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84
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85 local listener = service_info.listener;
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86 local mode = listener.default_mode or "*a";
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87 local ssl;
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88 if service_info.encryption == "ssl" then
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89 ssl = prosody.global_ssl_ctx;
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90 if not ssl then
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91 return nil, "global-ssl-context-required";
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92 end
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93 end
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94
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95 for interface in bind_interfaces do
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96 for port in bind_ports do
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97 if not service_info.multiplex and #active_services:search(nil, interface, port) > 0 then
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98 log("error", "Multiple services configured to listen on the same port: %s, %s", table.concat(active_services:search(nil, interface, port), ", "), service_name);
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99 else
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100 local handler, err = server.addserver(interface, port, listener, mode, ssl);
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101 if not handler then
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102 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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103 else
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104 log("debug", "Added listening service %s to [%s]:%d", service_name, interface, port);
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105 active_services:add(service_name, interface, port, {
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106 server = handler;
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107 service = service_info;
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108 });
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109 end
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110 end
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111 end
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112 end
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113 log("info", "Activated service '%s'", service_name);
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114 return true;
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115 end
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116
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117 function deactivate(service_name)
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118 local active = active_services:search(service_name)[1];
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119 if not active then return; end
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120 for interface, ports in pairs(active) do
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121 for port, active_service in pairs(ports) do
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122 active_service:close();
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123 active_services:remove(service_name, interface, port, active_service);
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124 log("debug", "Removed listening service %s from [%s]:%d", service_name, interface, port);
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125 end
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126 end
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127 log("info", "Deactivated service '%s'", service_name);
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128 end
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129
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130 function register_service(service_name, service_info)
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131 table.insert(services[service_name], service_info);
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132
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133 if not active_services:get(service_name) then
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134 log("debug", "No active service for %s, activating...", service_name);
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135 local ok, err = activate_service(service_name);
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136 if not ok then
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137 log("error", "Failed to activate service '%s': %s", service_name, err or "unknown error");
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138 end
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139 end
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140
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141 fire_event("service-added", { name = service_name, service = service_info });
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142 return true;
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143 end
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144
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145 function unregister_service(service_name, service_info)
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146 local service_info_list = services[service_name];
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147 for i, service in ipairs(service_info_list) do
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148 if service == service_info then
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149 table.remove(service_info_list, i);
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150 end
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151 end
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152 if active_services[service_name] == service_info then
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153 deactivate(service_name);
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154 if #service_info_list > 0 then -- Other services registered with this name
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155 activate(service_name); -- Re-activate with the next available one
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156 end
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157 end
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158 end
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159
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160 function get_service(service_name)
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161 return services[service_name];
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162 end
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163
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164 function get_active_services(...)
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165 return active_services;
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166 end
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167
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168 return _M;