prosody

   1 #!/usr/bin/env lua
   2 -- Prosody IM
   3 -- Copyright (C) 2008-2010 Matthew Wild
   4 -- Copyright (C) 2008-2010 Waqas Hussain
   5 --
   6 -- This project is MIT/X11 licensed. Please see the
   7 -- COPYING file in the source package for more information.
   8 --
   9
  10 -- prosody - main executable for Prosody XMPP server
  11
  12 -- Will be modified by configure script if run --
  13
  14 CFG_SOURCEDIR=os.getenv("PROSODY_SRCDIR");
  15 CFG_CONFIGDIR=os.getenv("PROSODY_CFGDIR");
  16 CFG_PLUGINDIR=os.getenv("PROSODY_PLUGINDIR");
  17 CFG_DATADIR=os.getenv("PROSODY_DATADIR");
  18
  19 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  20
  21 local function is_relative(path)
  22         local path_sep = package.config:sub(1,1);
  23         return ((path_sep == "/" and path:sub(1,1) ~= "/")
  24         or (path_sep == "\\" and (path:sub(1,1) ~= "/" and path:sub(2,3) ~= ":\\")))
  25 end
  26
  27 -- Tell Lua where to find our libraries
  28 if CFG_SOURCEDIR then
  29         local function filter_relative_paths(path)
  30                 if is_relative(path) then return ""; end
  31         end
  32         local function sanitise_paths(paths)
  33                 return (paths:gsub("[^;]+;?", filter_relative_paths):gsub(";;+", ";"));
  34         end
  35         package.path = sanitise_paths(CFG_SOURCEDIR.."/?.lua;"..package.path);
  36         package.cpath = sanitise_paths(CFG_SOURCEDIR.."/?.so;"..package.cpath);
  37 end
  38
  39 -- Substitute ~ with path to home directory in data path
  40 if CFG_DATADIR then
  41         if os.getenv("HOME") then
  42                 CFG_DATADIR = CFG_DATADIR:gsub("^~", os.getenv("HOME"));
  43         end
  44 end
  45
  46 -- Global 'prosody' object
  47 local prosody = { events = require "util.events".new(); };
  48 _G.prosody = prosody;
  49
  50 -- Check dependencies
  51 local dependencies = require "util.dependencies";
  52 if not dependencies.check_dependencies() then
  53         os.exit(1);
  54 end
  55
  56 -- Load the config-parsing module
  57 config = require "core.configmanager"
  58
  59 -- -- -- --
  60 -- Define the functions we call during startup, the
  61 -- actual startup happens right at the end, where these
  62 -- functions get called
  63
  64 function read_config()
  65         local filenames = {};
  66
  67         local filename;
  68         if arg[1] == "--config" and arg[2] then
  69                 table.insert(filenames, arg[2]);
  70                 if CFG_CONFIGDIR then
  71                         table.insert(filenames, CFG_CONFIGDIR.."/"..arg[2]);
  72                 end
  73         else
  74                 for _, format in ipairs(config.parsers()) do
  75                         table.insert(filenames, (CFG_CONFIGDIR or ".").."/prosody.cfg."..format);
  76                 end
  77         end
  78         for _,_filename in ipairs(filenames) do
  79                 filename = _filename;
  80                 local file = io.open(filename);
  81                 if file then
  82                         file:close();
  83                         CFG_CONFIGDIR = filename:match("^(.*)[\\/][^\\/]*$");
  84                         break;
  85                 end
  86         end
  87         local ok, level, err = config.load(filename);
  88         if not ok then
  89                 print("\n");
  90                 print("**************************");
  91                 if level == "parser" then
  92                         print("A problem occured while reading the config file "..(CFG_CONFIGDIR or ".").."/prosody.cfg.lua"..":");
  93                         print("");
  94                         local err_line, err_message = tostring(err):match("%[string .-%]:(%d*): (.*)");
  95                         if err:match("chunk has too many syntax levels$") then
  96                                 print("An Include statement in a config file is including an already-included");
  97                                 print("file and causing an infinite loop. An Include statement in a config file is...");
  98                         else
  99                                 print("Error"..(err_line and (" on line "..err_line) or "")..": "..(err_message or tostring(err)));
 100                         end
 101                         print("");
 102                 elseif level == "file" then
 103                         print("Prosody was unable to find the configuration file.");
 104                         print("We looked for: "..(CFG_CONFIGDIR or ".").."/prosody.cfg.lua");
 105                         print("A sample config file is included in the Prosody download called prosody.cfg.lua.dist");
 106                         print("Copy or rename it to prosody.cfg.lua and edit as necessary.");
 107                 end
 108                 print("More help on configuring Prosody can be found at http://prosody.im/doc/configure");
 109                 print("Good luck!");
 110                 print("**************************");
 111                 print("");
 112                 os.exit(1);
 113         end
 114 end
 115
 116 function load_libraries()
 117         -- Load socket framework
 118         server = require "net.server"
 119 end
 120
 121 function init_logging()
 122         -- Initialize logging
 123         require "core.loggingmanager"
 124 end
 125
 126 function log_dependency_warnings()
 127         dependencies.log_warnings();
 128 end
 129
 130 function sandbox_require()
 131         -- Replace require() with one that doesn't pollute _G, required
 132         -- for neat sandboxing of modules
 133         local _realG = _G;
 134         local _real_require = require;
 135         function require(...)
 136                 local curr_env = getfenv(2);
 137                 local curr_env_mt = getmetatable(getfenv(2));
 138                 local _realG_mt = getmetatable(_realG);
 139                 if curr_env_mt and curr_env_mt.__index and not curr_env_mt.__newindex and _realG_mt then
 140                         local old_newindex
 141                         old_newindex, _realG_mt.__newindex = _realG_mt.__newindex, curr_env;
 142                         local ret = _real_require(...);
 143                         _realG_mt.__newindex = old_newindex;
 144                         return ret;
 145                 end
 146                 return _real_require(...);
 147         end
 148 end
 149
 150 function set_function_metatable()
 151         local mt = {};
 152         function mt.__index(f, upvalue)
 153                 local i, name, value = 0;
 154                 repeat
 155                         i = i + 1;
 156                         name, value = debug.getupvalue(f, i);
 157                 until name == upvalue or name == nil;
 158                 return value;
 159         end
 160         function mt.__newindex(f, upvalue, value)
 161                 local i, name = 0;
 162                 repeat
 163                         i = i + 1;
 164                         name = debug.getupvalue(f, i);
 165                 until name == upvalue or name == nil;
 166                 if name then
 167                         debug.setupvalue(f, i, value);
 168                 end
 169         end
 170         function mt.__tostring(f)
 171                 local info = debug.getinfo(f);
 172                 return ("function(%s:%d)"):format(info.short_src:match("[^\\/]*$"), info.linedefined);
 173         end
 174         debug.setmetatable(function() end, mt);
 175 end
 176
 177 function init_global_state()
 178         bare_sessions = {};
 179         full_sessions = {};
 180         hosts = {};
 181
 182         prosody.bare_sessions = bare_sessions;
 183         prosody.full_sessions = full_sessions;
 184         prosody.hosts = hosts;
 185
 186         local data_path = config.get("*", "core", "data_path") or CFG_DATADIR or "data";
 187         local custom_plugin_paths = config.get("*", "core", "plugin_paths");
 188         if custom_plugin_paths then
 189                 CFG_PLUGINDIR = table.concat(custom_plugin_paths, package.config:sub(3,3)); -- path1;path2;path3
 190         end
 191         prosody.paths = { source = CFG_SOURCEDIR, config = CFG_CONFIGDIR,
 192                           plugins = CFG_PLUGINDIR, data = data_path };
 193
 194         prosody.arg = _G.arg;
 195
 196         prosody.platform = "unknown";
 197         if os.getenv("WINDIR") then
 198                 prosody.platform = "windows";
 199         elseif package.config:sub(1,1) == "/" then
 200                 prosody.platform = "posix";
 201         end
 202
 203         prosody.installed = nil;
 204         if CFG_SOURCEDIR and (prosody.platform == "windows" or CFG_SOURCEDIR:match("^/")) then
 205                 prosody.installed = true;
 206         end
 207
 208         -- Function to reload the config file
 209         function prosody.reload_config()
 210                 log("info", "Reloading configuration file");
 211                 prosody.events.fire_event("reloading-config");
 212                 local ok, level, err = config.load((rawget(_G, "CFG_CONFIGDIR") or ".").."/prosody.cfg.lua");
 213                 if not ok then
 214                         if level == "parser" then
 215                                 log("error", "There was an error parsing the configuration file: %s", tostring(err));
 216                         elseif level == "file" then
 217                                 log("error", "Couldn't read the config file when trying to reload: %s", tostring(err));
 218                         end
 219                 end
 220                 return ok, (err and tostring(level)..": "..tostring(err)) or nil;
 221         end
 222
 223         -- Function to reopen logfiles
 224         function prosody.reopen_logfiles()
 225                 log("info", "Re-opening log files");
 226                 prosody.events.fire_event("reopen-log-files");
 227         end
 228
 229         -- Function to initiate prosody shutdown
 230         function prosody.shutdown(reason)
 231                 log("info", "Shutting down: %s", reason or "unknown reason");
 232                 prosody.shutdown_reason = reason;
 233                 prosody.events.fire_event("server-stopping", {reason = reason});
 234                 server.setquitting(true);
 235         end
 236
 237         -- Load SSL settings from config, and create a ctx table
 238         local certmanager = require "core.certmanager";
 239         local global_ssl_ctx = certmanager.create_context("*", "server");
 240         prosody.global_ssl_ctx = global_ssl_ctx;
 241
 242         local cl = require "net.connlisteners";
 243         function prosody.net_activate_ports(option, listener, default, conntype)
 244                 conntype = conntype or (global_ssl_ctx and "tls") or "tcp";
 245                 local ports_option = option and option.."_ports" or "ports";
 246                 if not cl.get(listener) then return; end
 247                 local ports = config.get("*", "core", ports_option) or default;
 248                 if type(ports) == "number" then ports = {ports} end;
 249
 250                 if type(ports) ~= "table" then
 251                         log("error", "core."..ports_option.." is not a table");
 252                 else
 253                         for _, port in ipairs(ports) do
 254                                 port = tonumber(port);
 255                                 if type(port) ~= "number" then
 256                                         log("error", "Non-numeric "..ports_option..": "..tostring(port));
 257                                 else
 258                                         local ok, err = cl.start(listener, {
 259                                                 ssl = conntype == "ssl" and global_ssl_ctx,
 260                                                 port = port,
 261                                                 interface = (option and config.get("*", "core", option.."_interface"))
 262                                                         or cl.get(listener).default_interface
 263                                                         or config.get("*", "core", "interface"),
 264                                                 type = conntype
 265                                         });
 266                                         if not ok then
 267                                                 local friendly_message = err;
 268                                                 if err:match(" in use") then
 269                                                         if port == 5222 or port == 5223 or port == 5269 then
 270                                                                 friendly_message = "check that Prosody or another XMPP server is "
 271                                                                         .."not already running and using this port";
 272                                                         elseif port == 80 or port == 81 then
 273                                                                 friendly_message = "check that a HTTP server is not already using "
 274                                                                         .."this port";
 275                                                         elseif port == 5280 then
 276                                                                 friendly_message = "check that Prosody or a BOSH connection manager "
 277                                                                         .."is not already running";
 278                                                         else
 279                                                                 friendly_message = "this port is in use by another application";
 280                                                         end
 281                                                 elseif err:match("permission") then
 282                                                         friendly_message = "Prosody does not have sufficient privileges to use this port";
 283                                                 elseif err == "no ssl context" then
 284                                                         if not config.get("*", "core", "ssl") then
 285                                                                 friendly_message = "there is no 'ssl' config under Host \"*\" which is "
 286                                                                         .."require for legacy SSL ports";
 287                                                         else
 288                                                                 friendly_message = "initializing SSL support failed, see previous log entries";
 289                                                         end
 290                                                 end
 291                                                 log("error", "Failed to open server port %d, %s", port, friendly_message);
 292                                         end
 293                                 end
 294                         end
 295                 end
 296         end
 297 end
 298
 299 function read_version()
 300         -- Try to determine version
 301         local version_file = io.open((CFG_SOURCEDIR or ".").."/prosody.version");
 302         if version_file then
 303                 prosody.version = version_file:read("*a"):gsub("%s*$", "");
 304                 version_file:close();
 305                 if #prosody.version == 12 and prosody.version:match("^[a-f0-9]+$") then
 306                         prosody.version = "hg:"..prosody.version;
 307                 end
 308         else
 309                 prosody.version = "unknown";
 310         end
 311 end
 312
 313 function load_secondary_libraries()
 314         --- Load and initialise core modules
 315         require "util.import"
 316         require "util.xmppstream"
 317         require "core.rostermanager"
 318         require "core.hostmanager"
 319         require "core.modulemanager"
 320         require "core.usermanager"
 321         require "core.sessionmanager"
 322         require "core.stanza_router"
 323         package.loaded['core.componentmanager'] = setmetatable({},{__index=function()
 324                 log("warn", "componentmanager is deprecated: %s", debug.traceback():match("\n[^\n]*\n[\s\t]*([^\n]*)"));
 325                 return function() end
 326         end});
 327
 328         require "net.http"
 329
 330         require "util.array"
 331         require "util.datetime"
 332         require "util.iterators"
 333         require "util.timer"
 334         require "util.helpers"
 335
 336         pcall(require, "util.signal") -- Not on Windows
 337
 338         -- Commented to protect us from
 339         -- the second kind of people
 340         --[[
 341         pcall(require, "remdebug.engine");
 342         if remdebug then remdebug.engine.start() end
 343         ]]
 344
 345         require "net.connlisteners";
 346
 347         require "util.stanza"
 348         require "util.jid"
 349 end
 350
 351 function init_data_store()
 352         require "core.storagemanager";
 353 end
 354
 355 function prepare_to_start()
 356         log("info", "Prosody is using the %s backend for connection handling", server.get_backend());
 357         -- Signal to modules that we are ready to start
 358         prosody.events.fire_event("server-starting");
 359
 360         -- start listening on sockets
 361         if config.get("*", "core", "ports") then
 362                 prosody.net_activate_ports(nil, "multiplex", {5222, 5269});
 363                 if config.get("*", "core", "ssl_ports") then
 364                         prosody.net_activate_ports("ssl", "multiplex", {5223}, "ssl");
 365                 end
 366         else
 367                 prosody.net_activate_ports("c2s", "xmppclient", {5222});
 368                 prosody.net_activate_ports("s2s", "xmppserver", {5269});
 369                 prosody.net_activate_ports("component", "xmppcomponent", {5347}, "tcp");
 370                 prosody.net_activate_ports("legacy_ssl", "xmppclient", {}, "ssl");
 371         end
 372
 373         prosody.start_time = os.time();
 374 end
 375
 376 function init_global_protection()
 377         -- Catch global accesses
 378         local locked_globals_mt = {
 379                 __index = function (t, k) log("warn", "%s", debug.traceback("Attempt to read a non-existent global '"..tostring(k).."'", 2)); end;
 380                 __newindex = function (t, k, v) error("Attempt to set a global: "..tostring(k).." = "..tostring(v), 2); end;
 381         };
 382
 383         function prosody.unlock_globals()
 384                 setmetatable(_G, nil);
 385         end
 386
 387         function prosody.lock_globals()
 388                 setmetatable(_G, locked_globals_mt);
 389         end
 390
 391         -- And lock now...
 392         prosody.lock_globals();
 393 end
 394
 395 function loop()
 396         -- Error handler for errors that make it this far
 397         local function catch_uncaught_error(err)
 398                 if type(err) == "string" and err:match("interrupted!$") then
 399                         return "quitting";
 400                 end
 401
 402                 log("error", "Top-level error, please report:\n%s", tostring(err));
 403                 local traceback = debug.traceback("", 2);
 404                 if traceback then
 405                         log("error", "%s", traceback);
 406                 end
 407
 408                 prosody.events.fire_event("very-bad-error", {error = err, traceback = traceback});
 409         end
 410
 411         while select(2, xpcall(server.loop, catch_uncaught_error)) ~= "quitting" do
 412                 socket.sleep(0.2);
 413         end
 414 end
 415
 416 function cleanup()
 417         log("info", "Shutdown status: Cleaning up");
 418         prosody.events.fire_event("server-cleanup");
 419
 420         -- Ok, we're quitting I know, but we
 421         -- need to do some tidying before we go :)
 422         server.setquitting(false);
 423
 424         log("info", "Shutdown status: Closing all active sessions");
 425         for hostname, host in pairs(hosts) do
 426                 log("debug", "Shutdown status: Closing client connections for %s", hostname)
 427                 if host.sessions then
 428                         local reason = { condition = "system-shutdown", text = "Server is shutting down" };
 429                         if prosody.shutdown_reason then
 430                                 reason.text = reason.text..": "..prosody.shutdown_reason;
 431                         end
 432                         for username, user in pairs(host.sessions) do
 433                                 for resource, session in pairs(user.sessions) do
 434                                         log("debug", "Closing connection for %s@%s/%s", username, hostname, resource);
 435                                         session:close(reason);
 436                                 end
 437                         end
 438                 end
 439
 440                 log("debug", "Shutdown status: Closing outgoing s2s connections from %s", hostname);
 441                 if host.s2sout then
 442                         for remotehost, session in pairs(host.s2sout) do
 443                                 if session.close then
 444                                         session:close("system-shutdown");
 445                                 else
 446                                         log("warn", "Unable to close outgoing s2s session to %s, no session:close()?!", remotehost);
 447                                 end
 448                         end
 449                 end
 450         end
 451
 452         log("info", "Shutdown status: Closing all server connections");
 453         server.closeall();
 454
 455         server.setquitting(true);
 456 end
 457
 458 -- Are you ready? :)
 459 -- These actions are in a strict order, as many depend on
 460 -- previous steps to have already been performed
 461 read_config();
 462 init_logging();
 463 sandbox_require();
 464 set_function_metatable();
 465 load_libraries();
 466 init_global_state();
 467 read_version();
 468 log("info", "Hello and welcome to Prosody version %s", prosody.version);
 469 log_dependency_warnings();
 470 load_secondary_libraries();
 471 init_data_store();
 472 init_global_protection();
 473 prepare_to_start();
 474
 475 prosody.events.fire_event("server-started");
 476
 477 loop();
 478
 479 log("info", "Shutting down...");
 480 cleanup();
 481 prosody.events.fire_event("server-stopped");
 482 log("info", "Shutdown complete");
 483