src/configreader.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2007-2009 Robin Burchell <robin+git@viroteck.net>
   6  *   Copyright (C) 2006-2009 Dennis Friis <peavey@inspircd.org>
   7  *   Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
   8  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   9  *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
  10  *
  11  * This file is part of InspIRCd.  InspIRCd is free software: you can
  12  * redistribute it and/or modify it under the terms of the GNU General Public
  13  * License as published by the Free Software Foundation, version 2.
  14  *
  15  * This program is distributed in the hope that it will be useful, but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  17  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  18  * details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24
  25 #include "inspircd.h"
  26 #include "xline.h"
  27 #include "listmode.h"
  28 #include "exitcodes.h"
  29 #include "configparser.h"
  30 #include <iostream>
  31
  32 ServerLimits::ServerLimits(ConfigTag* tag)
  33         : NickMax(tag->getUInt("maxnick", 30))
  34         , ChanMax(tag->getUInt("maxchan", 64))
  35         , MaxModes(tag->getUInt("maxmodes", 20))
  36         , IdentMax(tag->getUInt("maxident", 10))
  37         , MaxQuit(tag->getUInt("maxquit", 255))
  38         , MaxTopic(tag->getUInt("maxtopic", 307))
  39         , MaxKick(tag->getUInt("maxkick", 255))
  40         , MaxReal(tag->getUInt("maxreal", tag->getUInt("maxgecos", 128)))
  41         , MaxAway(tag->getUInt("maxaway", 200))
  42         , MaxLine(tag->getUInt("maxline", 512))
  43         , MaxHost(tag->getUInt("maxhost", 64))
  44 {
  45 }
  46
  47 ServerConfig::ServerPaths::ServerPaths(ConfigTag* tag)
  48         : Config(tag->getString("configdir", INSPIRCD_CONFIG_PATH))
  49         , Data(tag->getString("datadir", INSPIRCD_DATA_PATH))
  50         , Log(tag->getString("logdir", INSPIRCD_LOG_PATH))
  51         , Module(tag->getString("moduledir", INSPIRCD_MODULE_PATH))
  52 {
  53 }
  54
  55 static ConfigTag* CreateEmptyTag()
  56 {
  57         ConfigItems* items;
  58         return ConfigTag::create("empty", "<auto>", 0, items);
  59 }
  60
  61 ServerConfig::ServerConfig()
  62         : EmptyTag(CreateEmptyTag())
  63         , Limits(EmptyTag)
  64         , Paths(EmptyTag)
  65         , RawLog(false)
  66         , NoSnoticeStack(false)
  67 {
  68 }
  69
  70 ServerConfig::~ServerConfig()
  71 {
  72         delete EmptyTag;
  73 }
  74
  75 bool ServerConfig::ApplyDisabledCommands()
  76 {
  77         // Enable everything first.
  78         const CommandParser::CommandMap& commands = ServerInstance->Parser.GetCommands();
  79         for (CommandParser::CommandMap::const_iterator x = commands.begin(); x != commands.end(); ++x)
  80                 x->second->Disable(false);
  81
  82         // Now disable the commands specified in the config.
  83         std::string command;
  84         irc::spacesepstream commandlist(ConfValue("disabled")->getString("commands"));
  85         while (commandlist.GetToken(command))
  86         {
  87                 Command* handler = ServerInstance->Parser.GetHandler(command);
  88                 if (!handler)
  89                 {
  90                         ServerInstance->Logs->Log("CONFIG", LOG_DEBUG, "Unable to disable the %s command as it does not exist!", command.c_str());
  91                         continue;
  92                 }
  93
  94                 ServerInstance->Logs->Log("CONFIG", LOG_DEBUG, "The %s command has been disabled", command.c_str());
  95                 handler->Disable(true);
  96         }
  97         return true;
  98 }
  99
 100 static void ReadXLine(ServerConfig* conf, const std::string& tag, const std::string& key, XLineFactory* make)
 101 {
 102         ConfigTagList tags = conf->ConfTags(tag);
 103         for(ConfigIter i = tags.first; i != tags.second; ++i)
 104         {
 105                 ConfigTag* ctag = i->second;
 106                 std::string mask;
 107                 if (!ctag->readString(key, mask))
 108                         throw CoreException("<"+tag+":"+key+"> missing at " + ctag->getTagLocation());
 109                 std::string reason = ctag->getString("reason", "<Config>");
 110                 XLine* xl = make->Generate(ServerInstance->Time(), 0, "<Config>", reason, mask);
 111                 xl->from_config = true;
 112                 if (!ServerInstance->XLines->AddLine(xl, NULL))
 113                         delete xl;
 114         }
 115 }
 116
 117 typedef std::map<std::string, ConfigTag*> LocalIndex;
 118 void ServerConfig::CrossCheckOperClassType()
 119 {
 120         LocalIndex operclass;
 121         ConfigTagList tags = ConfTags("class");
 122         for(ConfigIter i = tags.first; i != tags.second; ++i)
 123         {
 124                 ConfigTag* tag = i->second;
 125                 std::string name = tag->getString("name");
 126                 if (name.empty())
 127                         throw CoreException("<class:name> missing from tag at " + tag->getTagLocation());
 128                 if (operclass.find(name) != operclass.end())
 129                         throw CoreException("Duplicate class block with name " + name + " at " + tag->getTagLocation());
 130                 operclass[name] = tag;
 131         }
 132         tags = ConfTags("type");
 133         for(ConfigIter i = tags.first; i != tags.second; ++i)
 134         {
 135                 ConfigTag* tag = i->second;
 136                 std::string name = tag->getString("name");
 137                 if (name.empty())
 138                         throw CoreException("<type:name> is missing from tag at " + tag->getTagLocation());
 139                 if (OperTypes.find(name) != OperTypes.end())
 140                         throw CoreException("Duplicate type block with name " + name + " at " + tag->getTagLocation());
 141
 142                 OperInfo* ifo = new OperInfo(name);
 143                 OperTypes[name] = ifo;
 144                 ifo->type_block = tag;
 145
 146                 std::string classname;
 147                 irc::spacesepstream str(tag->getString("classes"));
 148                 while (str.GetToken(classname))
 149                 {
 150                         LocalIndex::iterator cls = operclass.find(classname);
 151                         if (cls == operclass.end())
 152                                 throw CoreException("Oper type " + name + " has missing class " + classname);
 153                         ifo->class_blocks.push_back(cls->second);
 154                 }
 155         }
 156
 157         tags = ConfTags("oper");
 158         for(ConfigIter i = tags.first; i != tags.second; ++i)
 159         {
 160                 ConfigTag* tag = i->second;
 161
 162                 std::string name = tag->getString("name");
 163                 if (name.empty())
 164                         throw CoreException("<oper:name> missing from tag at " + tag->getTagLocation());
 165
 166                 std::string type = tag->getString("type");
 167                 OperIndex::iterator tblk = OperTypes.find(type);
 168                 if (tblk == OperTypes.end())
 169                         throw CoreException("Oper block " + name + " has missing type " + type);
 170                 if (oper_blocks.find(name) != oper_blocks.end())
 171                         throw CoreException("Duplicate oper block with name " + name + " at " + tag->getTagLocation());
 172
 173                 OperInfo* ifo = new OperInfo(type);
 174                 ifo->oper_block = tag;
 175                 ifo->type_block = tblk->second->type_block;
 176                 ifo->class_blocks.assign(tblk->second->class_blocks.begin(), tblk->second->class_blocks.end());
 177                 oper_blocks[name] = ifo;
 178         }
 179 }
 180
 181 void ServerConfig::CrossCheckConnectBlocks(ServerConfig* current)
 182 {
 183         typedef std::map<std::string, ConnectClass*> ClassMap;
 184         ClassMap oldBlocksByMask;
 185         if (current)
 186         {
 187                 for(ClassVector::iterator i = current->Classes.begin(); i != current->Classes.end(); ++i)
 188                 {
 189                         ConnectClass* c = *i;
 190                         if (c->name.compare(0, 8, "unnamed-", 8))
 191                         {
 192                                 oldBlocksByMask["n" + c->name] = c;
 193                         }
 194                         else if (c->type == CC_ALLOW || c->type == CC_DENY)
 195                         {
 196                                 std::string typeMask = (c->type == CC_ALLOW) ? "a" : "d";
 197                                 typeMask += c->host;
 198                                 oldBlocksByMask[typeMask] = c;
 199                         }
 200                 }
 201         }
 202
 203         size_t blk_count = config_data.count("connect");
 204         if (blk_count == 0)
 205         {
 206                 // No connect blocks found; make a trivial default block
 207                 ConfigItems* items;
 208                 ConfigTag* tag = ConfigTag::create("connect", "<auto>", 0, items);
 209                 (*items)["allow"] = "*";
 210                 config_data.insert(std::make_pair("connect", tag));
 211                 blk_count = 1;
 212         }
 213
 214         Classes.resize(blk_count);
 215         std::map<std::string, size_t> names;
 216
 217         bool try_again = true;
 218         for(size_t tries = 0; try_again; tries++)
 219         {
 220                 try_again = false;
 221                 ConfigTagList tags = ConfTags("connect");
 222                 size_t i = 0;
 223                 for(ConfigIter it = tags.first; it != tags.second; ++it, ++i)
 224                 {
 225                         ConfigTag* tag = it->second;
 226                         if (Classes[i])
 227                                 continue;
 228
 229                         ConnectClass* parent = NULL;
 230                         std::string parentName = tag->getString("parent");
 231                         if (!parentName.empty())
 232                         {
 233                                 std::map<std::string, size_t>::const_iterator parentIter = names.find(parentName);
 234                                 if (parentIter == names.end())
 235                                 {
 236                                         try_again = true;
 237                                         // couldn't find parent this time. If it's the last time, we'll never find it.
 238                                         if (tries >= blk_count)
 239                                                 throw CoreException("Could not find parent connect class \"" + parentName + "\" for connect block at " + tag->getTagLocation());
 240                                         continue;
 241                                 }
 242                                 parent = Classes[parentIter->second];
 243                         }
 244
 245                         std::string name = tag->getString("name");
 246                         std::string mask, typeMask;
 247                         char type;
 248
 249                         if (tag->readString("allow", mask, false))
 250                         {
 251                                 type = CC_ALLOW;
 252                                 typeMask = 'a' + mask;
 253                         }
 254                         else if (tag->readString("deny", mask, false))
 255                         {
 256                                 type = CC_DENY;
 257                                 typeMask = 'd' + mask;
 258                         }
 259                         else if (!name.empty())
 260                         {
 261                                 type = CC_NAMED;
 262                                 mask = name;
 263                                 typeMask = 'n' + mask;
 264                         }
 265                         else
 266                         {
 267                                 throw CoreException("Connect class must have allow, deny, or name specified at " + tag->getTagLocation());
 268                         }
 269
 270                         if (name.empty())
 271                         {
 272                                 name = "unnamed-" + ConvToStr(i);
 273                         }
 274                         else
 275                         {
 276                                 typeMask = 'n' + name;
 277                         }
 278
 279                         if (names.find(name) != names.end())
 280                                 throw CoreException("Two connect classes with name \"" + name + "\" defined!");
 281                         names[name] = i;
 282
 283                         ConnectClass* me = parent ?
 284                                 new ConnectClass(tag, type, mask, *parent) :
 285                                 new ConnectClass(tag, type, mask);
 286
 287                         me->name = name;
 288
 289                         me->registration_timeout = tag->getDuration("timeout", me->registration_timeout);
 290                         me->pingtime = tag->getDuration("pingfreq", me->pingtime);
 291                         std::string sendq;
 292                         if (tag->readString("sendq", sendq))
 293                         {
 294                                 // attempt to guess a good hard/soft sendq from a single value
 295                                 unsigned long value = strtoul(sendq.c_str(), NULL, 10);
 296                                 if (value > 16384)
 297                                         me->softsendqmax = value / 16;
 298                                 else
 299                                         me->softsendqmax = value;
 300                                 me->hardsendqmax = value * 8;
 301                         }
 302                         me->softsendqmax = tag->getUInt("softsendq", me->softsendqmax);
 303                         me->hardsendqmax = tag->getUInt("hardsendq", me->hardsendqmax);
 304                         me->recvqmax = tag->getUInt("recvq", me->recvqmax);
 305                         me->penaltythreshold = tag->getUInt("threshold", me->penaltythreshold);
 306                         me->commandrate = tag->getUInt("commandrate", me->commandrate);
 307                         me->fakelag = tag->getBool("fakelag", me->fakelag);
 308                         me->maxlocal = tag->getUInt("localmax", me->maxlocal);
 309                         me->maxglobal = tag->getUInt("globalmax", me->maxglobal);
 310                         me->maxchans = tag->getUInt("maxchans", me->maxchans);
 311                         me->maxconnwarn = tag->getBool("maxconnwarn", me->maxconnwarn);
 312                         me->limit = tag->getUInt("limit", me->limit);
 313                         me->resolvehostnames = tag->getBool("resolvehostnames", me->resolvehostnames);
 314
 315                         std::string ports = tag->getString("port");
 316                         if (!ports.empty())
 317                         {
 318                                 irc::portparser portrange(ports, false);
 319                                 while (int port = portrange.GetToken())
 320                                         me->ports.insert(port);
 321                         }
 322
 323                         ClassMap::iterator oldMask = oldBlocksByMask.find(typeMask);
 324                         if (oldMask != oldBlocksByMask.end())
 325                         {
 326                                 ConnectClass* old = oldMask->second;
 327                                 oldBlocksByMask.erase(oldMask);
 328                                 old->Update(me);
 329                                 delete me;
 330                                 me = old;
 331                         }
 332                         Classes[i] = me;
 333                 }
 334         }
 335 }
 336
 337 void ServerConfig::Fill()
 338 {
 339         ConfigTag* options = ConfValue("options");
 340         ConfigTag* security = ConfValue("security");
 341         ConfigTag* server = ConfValue("server");
 342         if (sid.empty())
 343         {
 344                 ServerName = server->getString("name", "irc.example.com", InspIRCd::IsHost);
 345
 346                 sid = server->getString("id");
 347                 if (!sid.empty() && !InspIRCd::IsSID(sid))
 348                         throw CoreException(sid + " is not a valid server ID. A server ID must be 3 characters long, with the first character a digit and the next two characters a digit or letter.");
 349
 350                 CaseMapping = options->getString("casemapping", "rfc1459");
 351                 if (CaseMapping == "ascii")
 352                         national_case_insensitive_map = ascii_case_insensitive_map;
 353                 else if (CaseMapping == "rfc1459")
 354                         national_case_insensitive_map = rfc_case_insensitive_map;
 355                 else
 356                         throw CoreException("<options:casemapping> must be set to 'ascii', or 'rfc1459'");
 357         }
 358         else
 359         {
 360                 std::string name = server->getString("name");
 361                 if (!name.empty() && name != ServerName)
 362                         throw CoreException("You must restart to change the server name");
 363
 364                 std::string nsid = server->getString("id");
 365                 if (!nsid.empty() && nsid != sid)
 366                         throw CoreException("You must restart to change the server id");
 367
 368                 std::string casemapping = options->getString("casemapping");
 369                 if (!casemapping.empty() && casemapping != CaseMapping)
 370                         throw CoreException("You must restart to change the server casemapping");
 371
 372         }
 373         SoftLimit = ConfValue("performance")->getUInt("softlimit", (SocketEngine::GetMaxFds() > 0 ? SocketEngine::GetMaxFds() : LONG_MAX), 10);
 374         CCOnConnect = ConfValue("performance")->getBool("clonesonconnect", true);
 375         MaxConn = ConfValue("performance")->getUInt("somaxconn", SOMAXCONN);
 376         XLineMessage = options->getString("xlinemessage", options->getString("moronbanner", "You're banned!"));
 377         ServerDesc = server->getString("description", "Configure Me");
 378         Network = server->getString("network", "Network");
 379         NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240, 1024, 65534);
 380         DisabledDontExist = ConfValue("disabled")->getBool("fakenonexistant");
 381         CustomVersion = security->getString("customversion");
 382         HideBans = security->getBool("hidebans");
 383         HideServer = security->getString("hideserver", security->getString("hidewhois"));
 384         SyntaxHints = options->getBool("syntaxhints");
 385         FullHostInTopic = options->getBool("hostintopic");
 386         MaxTargets = security->getUInt("maxtargets", 20, 1, 31);
 387         DefaultModes = options->getString("defaultmodes", "not");
 388         PID = ConfValue("pid")->getString("file");
 389         MaxChans = ConfValue("channels")->getUInt("users", 20);
 390         OperMaxChans = ConfValue("channels")->getUInt("opers", 0);
 391         c_ipv4_range = ConfValue("cidr")->getUInt("ipv4clone", 32, 1, 32);
 392         c_ipv6_range = ConfValue("cidr")->getUInt("ipv6clone", 128, 1, 128);
 393         Limits = ServerLimits(ConfValue("limits"));
 394         Paths = ServerPaths(ConfValue("path"));
 395         NoSnoticeStack = options->getBool("nosnoticestack", false);
 396
 397         std::string defbind = options->getString("defaultbind");
 398         if (stdalgo::string::equalsci(defbind, "ipv4"))
 399         {
 400                 WildcardIPv6 = false;
 401         }
 402         else if (stdalgo::string::equalsci(defbind, "ipv6"))
 403         {
 404                 WildcardIPv6 = true;
 405         }
 406         else
 407         {
 408                 WildcardIPv6 = true;
 409                 int socktest = socket(AF_INET6, SOCK_STREAM, 0);
 410                 if (socktest < 0)
 411                         WildcardIPv6 = false;
 412                 else
 413                         SocketEngine::Close(socktest);
 414         }
 415
 416         ServerInstance->XLines->ClearConfigLines();
 417         ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
 418         ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
 419         ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
 420         ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));
 421
 422         const std::string restrictbannedusers = options->getString("restrictbannedusers", "yes");
 423         if (stdalgo::string::equalsci(restrictbannedusers, "no"))
 424                 RestrictBannedUsers = ServerConfig::BUT_NORMAL;
 425         else if (stdalgo::string::equalsci(restrictbannedusers, "silent"))
 426                 RestrictBannedUsers = ServerConfig::BUT_RESTRICT_SILENT;
 427         else if (stdalgo::string::equalsci(restrictbannedusers, "yes"))
 428                 RestrictBannedUsers =  ServerConfig::BUT_RESTRICT_NOTIFY;
 429         else
 430                 throw CoreException(restrictbannedusers + " is an invalid <options:restrictbannedusers> value, at " + options->getTagLocation());
 431
 432         DisabledUModes.reset();
 433         std::string modes = ConfValue("disabled")->getString("usermodes");
 434         for (std::string::const_iterator p = modes.begin(); p != modes.end(); ++p)
 435         {
 436                 // Complain when the character is not a valid mode character.
 437                 if (!ModeParser::IsModeChar(*p))
 438                         throw CoreException("Invalid usermode " + std::string(1, *p) + " was found.");
 439                 DisabledUModes.set(*p - 'A');
 440         }
 441
 442         DisabledCModes.reset();
 443         modes = ConfValue("disabled")->getString("chanmodes");
 444         for (std::string::const_iterator p = modes.begin(); p != modes.end(); ++p)
 445         {
 446                 if (!ModeParser::IsModeChar(*p))
 447                         throw CoreException("Invalid chanmode " + std::string(1, *p) + " was found.");
 448                 DisabledCModes.set(*p - 'A');
 449         }
 450 }
 451
 452 // WARNING: it is not safe to use most of the codebase in this function, as it
 453 // will run in the config reader thread
 454 void ServerConfig::Read()
 455 {
 456         /* Load and parse the config file, if there are any errors then explode */
 457
 458         ParseStack stack(this);
 459         try
 460         {
 461                 valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
 462         }
 463         catch (CoreException& err)
 464         {
 465                 valid = false;
 466                 errstr << err.GetReason() << std::endl;
 467         }
 468 }
 469
 470 void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
 471 {
 472         valid = true;
 473         if (old)
 474         {
 475                 /*
 476                  * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
 477                  */
 478                 this->CaseMapping = old->CaseMapping;
 479                 this->ServerName = old->ServerName;
 480                 this->sid = old->sid;
 481                 this->cmdline = old->cmdline;
 482         }
 483
 484         /* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
 485         try
 486         {
 487                 // Ensure the user has actually edited ther config.
 488                 ConfigTagList dietags = ConfTags("die");
 489                 if (dietags.first != dietags.second)
 490                 {
 491                         errstr << "Your configuration has not been edited correctly!" << std::endl;
 492                         for (ConfigIter iter = dietags.first; iter != dietags.second; ++iter)
 493                         {
 494                                 ConfigTag* tag = iter->second;
 495                                 const std::string reason = tag->getString("reason", "You left a <die> tag in your config", 1);
 496                                 errstr << reason <<  " (at " << tag->getTagLocation() << ")" << std::endl;
 497                         }
 498                 }
 499
 500                 Fill();
 501
 502                 // Handle special items
 503                 CrossCheckOperClassType();
 504                 CrossCheckConnectBlocks(old);
 505         }
 506         catch (CoreException &ce)
 507         {
 508                 errstr << ce.GetReason() << std::endl;
 509         }
 510
 511         // Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
 512         valid = errstr.str().empty();
 513
 514         // write once here, to try it out and make sure its ok
 515         if (valid)
 516                 ServerInstance->WritePID(this->PID, !old);
 517
 518         ConfigTagList binds = ConfTags("bind");
 519         if (binds.first == binds.second)
 520                  errstr << "Possible configuration error: you have not defined any <bind> blocks." << std::endl
 521                          << "You will need to do this if you want clients to be able to connect!" << std::endl;
 522
 523         if (old && valid)
 524         {
 525                 // On first run, ports are bound later on
 526                 FailedPortList pl;
 527                 ServerInstance->BindPorts(pl);
 528                 if (pl.size())
 529                 {
 530                         errstr << "Not all your client ports could be bound." << std::endl
 531                                 << "The following port(s) failed to bind:" << std::endl;
 532
 533                         int j = 1;
 534                         for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 535                         {
 536                                 errstr << j << ".\tAddress: " << i->first.str() << "\tReason: " << strerror(i->second) << std::endl;
 537                         }
 538                 }
 539         }
 540
 541         User* user = useruid.empty() ? NULL : ServerInstance->FindNick(useruid);
 542
 543         if (!valid)
 544         {
 545                 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "There were errors in your configuration file:");
 546                 Classes.clear();
 547         }
 548
 549         while (errstr.good())
 550         {
 551                 std::string line;
 552                 getline(errstr, line, '\n');
 553                 if (line.empty())
 554                         continue;
 555                 // On startup, print out to console (still attached at this point)
 556                 if (!old)
 557                         std::cout << line << std::endl;
 558                 // If a user is rehashing, tell them directly
 559                 if (user)
 560                         user->WriteRemoteNotice(InspIRCd::Format("*** %s", line.c_str()));
 561                 // Also tell opers
 562                 ServerInstance->SNO->WriteGlobalSno('a', line);
 563         }
 564
 565         errstr.clear();
 566         errstr.str(std::string());
 567
 568         // Re-parse our MOTD and RULES files for colors -- Justasic
 569         for (ClassVector::const_iterator it = this->Classes.begin(), it_end = this->Classes.end(); it != it_end; ++it)
 570         {
 571                 ConfigTag *tag = (*it)->config;
 572
 573                 ConfigFileCache::iterator file = this->Files.find(tag->getString("motd", "motd"));
 574                 if (file != this->Files.end())
 575                         InspIRCd::ProcessColors(file->second);
 576         }
 577
 578         /* No old configuration -> initial boot, nothing more to do here */
 579         if (!old)
 580         {
 581                 if (!valid)
 582                 {
 583                         ServerInstance->Exit(EXIT_STATUS_CONFIG);
 584                 }
 585
 586                 return;
 587         }
 588
 589
 590         // If there were errors processing configuration, don't touch modules.
 591         if (!valid)
 592                 return;
 593
 594         ApplyModules(user);
 595
 596         if (user)
 597                 user->WriteRemoteNotice("*** Successfully rehashed server.");
 598         ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
 599 }
 600
 601 void ServerConfig::ApplyModules(User* user)
 602 {
 603         std::vector<std::string> added_modules;
 604         ModuleManager::ModuleMap removed_modules = ServerInstance->Modules->GetModules();
 605
 606         ConfigTagList tags = ConfTags("module");
 607         for(ConfigIter i = tags.first; i != tags.second; ++i)
 608         {
 609                 ConfigTag* tag = i->second;
 610                 std::string name;
 611                 if (tag->readString("name", name))
 612                 {
 613                         name = ModuleManager::ExpandModName(name);
 614                         // if this module is already loaded, the erase will succeed, so we need do nothing
 615                         // otherwise, we need to add the module (which will be done later)
 616                         if (removed_modules.erase(name) == 0)
 617                                 added_modules.push_back(name);
 618                 }
 619         }
 620
 621         for (ModuleManager::ModuleMap::iterator i = removed_modules.begin(); i != removed_modules.end(); ++i)
 622         {
 623                 const std::string& modname = i->first;
 624                 // Don't remove core_*.so, just remove m_*.so
 625                 if (InspIRCd::Match(modname, "core_*.so", ascii_case_insensitive_map))
 626                         continue;
 627                 if (ServerInstance->Modules->Unload(i->second))
 628                 {
 629                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s", modname.c_str());
 630
 631                         if (user)
 632                                 user->WriteNumeric(RPL_UNLOADEDMODULE, modname, InspIRCd::Format("Module %s successfully unloaded.", modname.c_str()));
 633                         else
 634                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully unloaded.", modname.c_str());
 635                 }
 636                 else
 637                 {
 638                         if (user)
 639                                 user->WriteNumeric(ERR_CANTUNLOADMODULE, modname, InspIRCd::Format("Failed to unload module %s: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str()));
 640                         else
 641                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload module %s: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str());
 642                 }
 643         }
 644
 645         for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 646         {
 647                 // Skip modules which are already loaded.
 648                 if (ServerInstance->Modules->Find(*adding))
 649                         continue;
 650
 651                 if (ServerInstance->Modules->Load(*adding))
 652                 {
 653                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
 654                         if (user)
 655                                 user->WriteNumeric(RPL_LOADEDMODULE, *adding, InspIRCd::Format("Module %s successfully loaded.", adding->c_str()));
 656                         else
 657                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully loaded.", adding->c_str());
 658                 }
 659                 else
 660                 {
 661                         if (user)
 662                                 user->WriteNumeric(ERR_CANTLOADMODULE, *adding, InspIRCd::Format("Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str()));
 663                         else
 664                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
 665                 }
 666         }
 667 }
 668
 669 ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 670 {
 671         ConfigTagList found = config_data.equal_range(tag);
 672         if (found.first == found.second)
 673                 return EmptyTag;
 674         ConfigTag* rv = found.first->second;
 675         found.first++;
 676         if (found.first != found.second)
 677                 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
 678                         "(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
 679         return rv;
 680 }
 681
 682 ConfigTagList ServerConfig::ConfTags(const std::string& tag)
 683 {
 684         return config_data.equal_range(tag);
 685 }
 686
 687 std::string ServerConfig::Escape(const std::string& str, bool xml)
 688 {
 689         std::string escaped;
 690         for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
 691         {
 692                 switch (*it)
 693                 {
 694                         case '"':
 695                                 escaped += xml ? "&quot;" : "\"";
 696                                 break;
 697                         case '&':
 698                                 escaped += xml ? "&amp;" : "&";
 699                                 break;
 700                         case '\\':
 701                                 escaped += xml ? "\\" : "\\\\";
 702                                 break;
 703                         default:
 704                                 escaped += *it;
 705                                 break;
 706                 }
 707         }
 708         return escaped;
 709 }
 710
 711 void ConfigReaderThread::Run()
 712 {
 713         Config->Read();
 714         done = true;
 715 }
 716
 717 void ConfigReaderThread::Finish()
 718 {
 719         ServerConfig* old = ServerInstance->Config;
 720         ServerInstance->Logs->Log("CONFIG", LOG_DEBUG, "Switching to new configuration...");
 721         ServerInstance->Config = this->Config;
 722         Config->Apply(old, TheUserUID);
 723
 724         if (Config->valid)
 725         {
 726                 /*
 727                  * Apply the changed configuration from the rehash.
 728                  *
 729                  * XXX: The order of these is IMPORTANT, do not reorder them without testing
 730                  * thoroughly!!!
 731                  */
 732                 ServerInstance->Users.RehashCloneCounts();
 733                 ServerInstance->XLines->CheckELines();
 734                 ServerInstance->XLines->ApplyLines();
 735                 Config->ApplyDisabledCommands();
 736                 User* user = ServerInstance->FindNick(TheUserUID);
 737
 738                 ConfigStatus status(user);
 739                 const ModuleManager::ModuleMap& mods = ServerInstance->Modules->GetModules();
 740                 for (ModuleManager::ModuleMap::const_iterator i = mods.begin(); i != mods.end(); ++i)
 741                 {
 742                         try
 743                         {
 744                                 ServerInstance->Logs->Log("MODULE", LOG_DEBUG, "Rehashing " + i->first);
 745                                 i->second->ReadConfig(status);
 746                         }
 747                         catch (CoreException& modex)
 748                         {
 749                                 ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Exception caught: " + modex.GetReason());
 750                                 if (user)
 751                                         user->WriteNotice(i->first + ": " + modex.GetReason());
 752                         }
 753                 }
 754
 755                 // The description of this server may have changed - update it for WHOIS etc.
 756                 ServerInstance->FakeClient->server->description = Config->ServerDesc;
 757
 758                 ServerInstance->ISupport.Build();
 759
 760                 ServerInstance->Logs->CloseLogs();
 761                 ServerInstance->Logs->OpenFileLogs();
 762
 763                 if (Config->RawLog && !old->RawLog)
 764                         ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 765
 766                 Config = old;
 767         }
 768         else
 769         {
 770                 // whoops, abort!
 771                 ServerInstance->Config = old;
 772         }
 773 }