net/server.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2010 Matthew Wild
   3 -- Copyright (C) 2008-2010 Waqas Hussain
   4 --
   5 -- This project is MIT/X11 licensed. Please see the
   6 -- COPYING file in the source package for more information.
   7 --
   8
   9 local server_type = prosody and require "core.configmanager".get("*", "server") or "select";
  10 if prosody and require "core.configmanager".get("*", "use_libevent") then
  11         server_type = "event";
  12 end
  13
  14 if server_type == "event" then
  15         if not pcall(require, "luaevent.core") then
  16                 print(log)
  17                 log("error", "libevent not found, falling back to select()");
  18                 server_type = "select"
  19         end
  20 end
  21
  22 local server;
  23 local set_config;
  24 if server_type == "event" then
  25         server = require "net.server_event";
  26
  27         -- Overwrite signal.signal() because we need to ask libevent to
  28         -- handle them instead
  29         local ok, signal = pcall(require, "util.signal");
  30         if ok and signal then
  31                 local _signal_signal = signal.signal;
  32                 function signal.signal(signal_id, handler)
  33                         if type(signal_id) == "string" then
  34                                 signal_id = signal[signal_id:upper()];
  35                         end
  36                         if type(signal_id) ~= "number" then
  37                                 return false, "invalid-signal";
  38                         end
  39                         return server.hook_signal(signal_id, handler);
  40                 end
  41         end
  42
  43         local defaults = {};
  44         for k,v in pairs(server.cfg) do
  45                 defaults[k] = v;
  46         end
  47         function set_config(settings)
  48                 local event_settings = {
  49                         ACCEPT_DELAY = settings.event_accept_retry_interval;
  50                         ACCEPT_QUEUE = settings.tcp_backlog;
  51                         CLEAR_DELAY = settings.event_clear_interval;
  52                         CONNECT_TIMEOUT = settings.connect_timeout;
  53                         DEBUG = settings.debug;
  54                         HANDSHAKE_TIMEOUT = settings.ssl_handshake_timeout;
  55                         MAX_CONNECTIONS = settings.max_connections;
  56                         MAX_HANDSHAKE_ATTEMPTS = settings.max_ssl_handshake_roundtrips;
  57                         MAX_READ_LENGTH = settings.max_receive_buffer_size;
  58                         MAX_SEND_LENGTH = settings.max_send_buffer_size;
  59                         READ_TIMEOUT = settings.read_timeout;
  60                         WRITE_TIMEOUT = settings.send_timeout;
  61                 };
  62
  63                 for k,default in pairs(defaults) do
  64                         server.cfg[k] = event_settings[k] or default;
  65                 end
  66         end
  67 elseif server_type == "select" then
  68         server = require "net.server_select";
  69
  70         local defaults = {};
  71         for k,v in pairs(server.getsettings()) do
  72                 defaults[k] = v;
  73         end
  74         function set_config(settings)
  75                 local select_settings = {};
  76                 for k,default in pairs(defaults) do
  77                         select_settings[k] = settings[k] or default;
  78                 end
  79                 server.changesettings(select_settings);
  80         end
  81 else
  82         error("Unsupported server type")
  83 end
  84
  85 if prosody then
  86         local config_get = require "core.configmanager".get;
  87         local function load_config()
  88                 local settings = config_get("*", "network_settings") or {};
  89                 return set_config(settings);
  90         end
  91         load_config();
  92         prosody.events.add_handler("config-reloaded", load_config);
  93 end
  94
  95 -- require "net.server" shall now forever return this,
  96 -- ie. server_select or server_event as chosen above.
  97 return server;