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         prosody.paths = { source = CFG_SOURCEDIR, config = CFG_CONFIGDIR,
 188                           plugins = CFG_PLUGINDIR, data = data_path };
 189
 190         prosody.arg = _G.arg;
 191
 192         prosody.platform = "unknown";
 193         if os.getenv("WINDIR") then
 194                 prosody.platform = "windows";
 195         elseif package.config:sub(1,1) == "/" then
 196                 prosody.platform = "posix";
 197         end
 198
 199         prosody.installed = nil;
 200         if CFG_SOURCEDIR and (prosody.platform == "windows" or CFG_SOURCEDIR:match("^/")) then
 201                 prosody.installed = true;
 202         end
 203
 204         -- Function to reload the config file
 205         function prosody.reload_config()
 206                 log("info", "Reloading configuration file");
 207                 prosody.events.fire_event("reloading-config");
 208                 local ok, level, err = config.load((rawget(_G, "CFG_CONFIGDIR") or ".").."/prosody.cfg.lua");
 209                 if not ok then
 210                         if level == "parser" then
 211                                 log("error", "There was an error parsing the configuration file: %s", tostring(err));
 212                         elseif level == "file" then
 213                                 log("error", "Couldn't read the config file when trying to reload: %s", tostring(err));
 214                         end
 215                 end
 216                 return ok, (err and tostring(level)..": "..tostring(err)) or nil;
 217         end
 218
 219         -- Function to reopen logfiles
 220         function prosody.reopen_logfiles()
 221                 log("info", "Re-opening log files");
 222                 prosody.events.fire_event("reopen-log-files");
 223         end
 224
 225         -- Function to initiate prosody shutdown
 226         function prosody.shutdown(reason)
 227                 log("info", "Shutting down: %s", reason or "unknown reason");
 228                 prosody.shutdown_reason = reason;
 229                 prosody.events.fire_event("server-stopping", {reason = reason});
 230                 server.setquitting(true);
 231         end
 232
 233         -- Load SSL settings from config, and create a ctx table
 234         local certmanager = require "core.certmanager";
 235         local global_ssl_ctx = certmanager.create_context("*", "server");
 236         prosody.global_ssl_ctx = global_ssl_ctx;
 237
 238         local cl = require "net.connlisteners";
 239         function prosody.net_activate_ports(option, listener, default, conntype)
 240                 conntype = conntype or (global_ssl_ctx and "tls") or "tcp";
 241                 local ports_option = option and option.."_ports" or "ports";
 242                 if not cl.get(listener) then return; end
 243                 local ports = config.get("*", "core", ports_option) or default;
 244                 if type(ports) == "number" then ports = {ports} end;
 245
 246                 if type(ports) ~= "table" then
 247                         log("error", "core."..ports_option.." is not a table");
 248                 else
 249                         for _, port in ipairs(ports) do
 250                                 port = tonumber(port);
 251                                 if type(port) ~= "number" then
 252                                         log("error", "Non-numeric "..ports_option..": "..tostring(port));
 253                                 else
 254                                         local ok, err = cl.start(listener, {
 255                                                 ssl = conntype == "ssl" and global_ssl_ctx,
 256                                                 port = port,
 257                                                 interface = (option and config.get("*", "core", option.."_interface"))
 258                                                         or cl.get(listener).default_interface
 259                                                         or config.get("*", "core", "interface"),
 260                                                 type = conntype
 261                                         });
 262                                         if not ok then
 263                                                 local friendly_message = err;
 264                                                 if err:match(" in use") then
 265                                                         if port == 5222 or port == 5223 or port == 5269 then
 266                                                                 friendly_message = "check that Prosody or another XMPP server is "
 267                                                                         .."not already running and using this port";
 268                                                         elseif port == 80 or port == 81 then
 269                                                                 friendly_message = "check that a HTTP server is not already using "
 270                                                                         .."this port";
 271                                                         elseif port == 5280 then
 272                                                                 friendly_message = "check that Prosody or a BOSH connection manager "
 273                                                                         .."is not already running";
 274                                                         else
 275                                                                 friendly_message = "this port is in use by another application";
 276                                                         end
 277                                                 elseif err:match("permission") then
 278                                                         friendly_message = "Prosody does not have sufficient privileges to use this port";
 279                                                 elseif err == "no ssl context" then
 280                                                         if not config.get("*", "core", "ssl") then
 281                                                                 friendly_message = "there is no 'ssl' config under Host \"*\" which is "
 282                                                                         .."require for legacy SSL ports";
 283                                                         else
 284                                                                 friendly_message = "initializing SSL support failed, see previous log entries";
 285                                                         end
 286                                                 end
 287                                                 log("error", "Failed to open server port %d, %s", port, friendly_message);
 288                                         end
 289                                 end
 290                         end
 291                 end
 292         end
 293 end
 294
 295 function read_version()
 296         -- Try to determine version
 297         local version_file = io.open((CFG_SOURCEDIR or ".").."/prosody.version");
 298         if version_file then
 299                 prosody.version = version_file:read("*a"):gsub("%s*$", "");
 300                 version_file:close();
 301                 if #prosody.version == 12 and prosody.version:match("^[a-f0-9]+$") then
 302                         prosody.version = "hg:"..prosody.version;
 303                 end
 304         else
 305                 prosody.version = "unknown";
 306         end
 307 end
 308
 309 function load_secondary_libraries()
 310         --- Load and initialise core modules
 311         require "util.import"
 312         require "util.xmppstream"
 313         require "core.rostermanager"
 314         require "core.hostmanager"
 315         require "core.modulemanager"
 316         require "core.usermanager"
 317         require "core.sessionmanager"
 318         require "core.stanza_router"
 319         package.loaded['core.componentmanager'] = setmetatable({},{__index=function()
 320                 log("warn", "componentmanager is deprecated: %s", debug.traceback():match("\n[^\n]*\n[\s\t]*([^\n]*)"));
 321                 return function() end
 322         end});
 323
 324         require "net.http"
 325
 326         require "util.array"
 327         require "util.datetime"
 328         require "util.iterators"
 329         require "util.timer"
 330         require "util.helpers"
 331
 332         pcall(require, "util.signal") -- Not on Windows
 333
 334         -- Commented to protect us from
 335         -- the second kind of people
 336         --[[
 337         pcall(require, "remdebug.engine");
 338         if remdebug then remdebug.engine.start() end
 339         ]]
 340
 341         require "net.connlisteners";
 342
 343         require "util.stanza"
 344         require "util.jid"
 345 end
 346
 347 function init_data_store()
 348         require "core.storagemanager";
 349 end
 350
 351 function prepare_to_start()
 352         log("info", "Prosody is using the %s backend for connection handling", server.get_backend());
 353         -- Signal to modules that we are ready to start
 354         prosody.events.fire_event("server-starting");
 355
 356         -- start listening on sockets
 357         if config.get("*", "core", "ports") then
 358                 prosody.net_activate_ports(nil, "multiplex", {5222, 5269});
 359                 if config.get("*", "core", "ssl_ports") then
 360                         prosody.net_activate_ports("ssl", "multiplex", {5223}, "ssl");
 361                 end
 362         else
 363                 prosody.net_activate_ports("c2s", "xmppclient", {5222});
 364                 prosody.net_activate_ports("s2s", "xmppserver", {5269});
 365                 prosody.net_activate_ports("component", "xmppcomponent", {5347}, "tcp");
 366                 prosody.net_activate_ports("legacy_ssl", "xmppclient", {}, "ssl");
 367         end
 368
 369         prosody.start_time = os.time();
 370 end
 371
 372 function init_global_protection()
 373         -- Catch global accesses
 374         local locked_globals_mt = {
 375                 __index = function (t, k) log("warn", "%s", debug.traceback("Attempt to read a non-existent global '"..tostring(k).."'", 2)); end;
 376                 __newindex = function (t, k, v) error("Attempt to set a global: "..tostring(k).." = "..tostring(v), 2); end;
 377         };
 378
 379         function prosody.unlock_globals()
 380                 setmetatable(_G, nil);
 381         end
 382
 383         function prosody.lock_globals()
 384                 setmetatable(_G, locked_globals_mt);
 385         end
 386
 387         -- And lock now...
 388         prosody.lock_globals();
 389 end
 390
 391 function loop()
 392         -- Error handler for errors that make it this far
 393         local function catch_uncaught_error(err)
 394                 if type(err) == "string" and err:match("interrupted!$") then
 395                         return "quitting";
 396                 end
 397
 398                 log("error", "Top-level error, please report:\n%s", tostring(err));
 399                 local traceback = debug.traceback("", 2);
 400                 if traceback then
 401                         log("error", "%s", traceback);
 402                 end
 403
 404                 prosody.events.fire_event("very-bad-error", {error = err, traceback = traceback});
 405         end
 406
 407         while select(2, xpcall(server.loop, catch_uncaught_error)) ~= "quitting" do
 408                 socket.sleep(0.2);
 409         end
 410 end
 411
 412 function cleanup()
 413         log("info", "Shutdown status: Cleaning up");
 414         prosody.events.fire_event("server-cleanup");
 415
 416         -- Ok, we're quitting I know, but we
 417         -- need to do some tidying before we go :)
 418         server.setquitting(false);
 419
 420         log("info", "Shutdown status: Closing all active sessions");
 421         for hostname, host in pairs(hosts) do
 422                 log("debug", "Shutdown status: Closing client connections for %s", hostname)
 423                 if host.sessions then
 424                         local reason = { condition = "system-shutdown", text = "Server is shutting down" };
 425                         if prosody.shutdown_reason then
 426                                 reason.text = reason.text..": "..prosody.shutdown_reason;
 427                         end
 428                         for username, user in pairs(host.sessions) do
 429                                 for resource, session in pairs(user.sessions) do
 430                                         log("debug", "Closing connection for %s@%s/%s", username, hostname, resource);
 431                                         session:close(reason);
 432                                 end
 433                         end
 434                 end
 435
 436                 log("debug", "Shutdown status: Closing outgoing s2s connections from %s", hostname);
 437                 if host.s2sout then
 438                         for remotehost, session in pairs(host.s2sout) do
 439                                 if session.close then
 440                                         session:close("system-shutdown");
 441                                 else
 442                                         log("warn", "Unable to close outgoing s2s session to %s, no session:close()?!", remotehost);
 443                                 end
 444                         end
 445                 end
 446         end
 447
 448         log("info", "Shutdown status: Closing all server connections");
 449         server.closeall();
 450
 451         server.setquitting(true);
 452 end
 453
 454 -- Are you ready? :)
 455 -- These actions are in a strict order, as many depend on
 456 -- previous steps to have already been performed
 457 read_config();
 458 init_logging();
 459 sandbox_require();
 460 set_function_metatable();
 461 load_libraries();
 462 init_global_state();
 463 read_version();
 464 log("info", "Hello and welcome to Prosody version %s", prosody.version);
 465 log_dependency_warnings();
 466 load_secondary_libraries();
 467 init_data_store();
 468 init_global_protection();
 469 prepare_to_start();
 470
 471 prosody.events.fire_event("server-started");
 472
 473 loop();
 474
 475 log("info", "Shutting down...");
 476 cleanup();
 477 prosody.events.fire_event("server-stopped");
 478 log("info", "Shutdown complete");
 479