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 static void ReadXLine(ServerConfig* conf, const std::string& tag, const std::string& key, XLineFactory* make)
  76 {
  77         insp::flat_set<std::string> configlines;
  78
  79         ConfigTagList tags = conf->ConfTags(tag);
  80         for(ConfigIter i = tags.first; i != tags.second; ++i)
  81         {
  82                 ConfigTag* ctag = i->second;
  83
  84                 const std::string mask = ctag->getString(key);
  85                 if (mask.empty())
  86                         throw CoreException("<" + tag + ":" + key + "> missing at " + ctag->getTagLocation());
  87
  88                 const std::string reason = ctag->getString("reason");
  89                 if (reason.empty())
  90                         throw CoreException("<" + tag + ":reason> missing at " + ctag->getTagLocation());
  91
  92                 XLine* xl = make->Generate(ServerInstance->Time(), 0, ServerInstance->Config->ServerName, reason, mask);
  93                 xl->from_config = true;
  94                 configlines.insert(xl->Displayable());
  95                 if (!ServerInstance->XLines->AddLine(xl, NULL))
  96                         delete xl;
  97         }
  98
  99         ServerInstance->XLines->ExpireRemovedConfigLines(make->GetType(), configlines);
 100 }
 101
 102 typedef std::map<std::string, ConfigTag*> LocalIndex;
 103 void ServerConfig::CrossCheckOperClassType()
 104 {
 105         LocalIndex operclass;
 106         ConfigTagList tags = ConfTags("class");
 107         for(ConfigIter i = tags.first; i != tags.second; ++i)
 108         {
 109                 ConfigTag* tag = i->second;
 110                 std::string name = tag->getString("name");
 111                 if (name.empty())
 112                         throw CoreException("<class:name> missing from tag at " + tag->getTagLocation());
 113                 if (operclass.find(name) != operclass.end())
 114                         throw CoreException("Duplicate class block with name " + name + " at " + tag->getTagLocation());
 115                 operclass[name] = tag;
 116         }
 117         tags = ConfTags("type");
 118         for(ConfigIter i = tags.first; i != tags.second; ++i)
 119         {
 120                 ConfigTag* tag = i->second;
 121                 std::string name = tag->getString("name");
 122                 if (name.empty())
 123                         throw CoreException("<type:name> is missing from tag at " + tag->getTagLocation());
 124                 if (OperTypes.find(name) != OperTypes.end())
 125                         throw CoreException("Duplicate type block with name " + name + " at " + tag->getTagLocation());
 126
 127                 OperInfo* ifo = new OperInfo(name);
 128                 OperTypes[name] = ifo;
 129                 ifo->type_block = tag;
 130
 131                 std::string classname;
 132                 irc::spacesepstream str(tag->getString("classes"));
 133                 while (str.GetToken(classname))
 134                 {
 135                         LocalIndex::iterator cls = operclass.find(classname);
 136                         if (cls == operclass.end())
 137                                 throw CoreException("Oper type " + name + " has missing class " + classname);
 138                         ifo->class_blocks.push_back(cls->second);
 139                 }
 140         }
 141
 142         tags = ConfTags("oper");
 143         for(ConfigIter i = tags.first; i != tags.second; ++i)
 144         {
 145                 ConfigTag* tag = i->second;
 146
 147                 std::string name = tag->getString("name");
 148                 if (name.empty())
 149                         throw CoreException("<oper:name> missing from tag at " + tag->getTagLocation());
 150
 151                 std::string type = tag->getString("type");
 152                 OperIndex::iterator tblk = OperTypes.find(type);
 153                 if (tblk == OperTypes.end())
 154                         throw CoreException("Oper block " + name + " has missing type " + type);
 155                 if (oper_blocks.find(name) != oper_blocks.end())
 156                         throw CoreException("Duplicate oper block with name " + name + " at " + tag->getTagLocation());
 157
 158                 OperInfo* ifo = new OperInfo(type);
 159                 ifo->oper_block = tag;
 160                 ifo->type_block = tblk->second->type_block;
 161                 ifo->class_blocks.assign(tblk->second->class_blocks.begin(), tblk->second->class_blocks.end());
 162                 oper_blocks[name] = ifo;
 163         }
 164 }
 165
 166 void ServerConfig::CrossCheckConnectBlocks(ServerConfig* current)
 167 {
 168         typedef std::map<std::string, ConnectClass*> ClassMap;
 169         ClassMap oldBlocksByMask;
 170         if (current)
 171         {
 172                 for(ClassVector::iterator i = current->Classes.begin(); i != current->Classes.end(); ++i)
 173                 {
 174                         ConnectClass* c = *i;
 175                         if (c->name.compare(0, 8, "unnamed-", 8))
 176                         {
 177                                 oldBlocksByMask["n" + c->name] = c;
 178                         }
 179                         else if (c->type == CC_ALLOW || c->type == CC_DENY)
 180                         {
 181                                 std::string typeMask = (c->type == CC_ALLOW) ? "a" : "d";
 182                                 typeMask += c->host;
 183                                 oldBlocksByMask[typeMask] = c;
 184                         }
 185                 }
 186         }
 187
 188         size_t blk_count = config_data.count("connect");
 189         if (blk_count == 0)
 190         {
 191                 // No connect blocks found; make a trivial default block
 192                 ConfigItems* items;
 193                 ConfigTag* tag = ConfigTag::create("connect", "<auto>", 0, items);
 194                 (*items)["allow"] = "*";
 195                 config_data.insert(std::make_pair("connect", tag));
 196                 blk_count = 1;
 197         }
 198
 199         Classes.resize(blk_count);
 200         std::map<std::string, size_t> names;
 201
 202         bool try_again = true;
 203         for(size_t tries = 0; try_again; tries++)
 204         {
 205                 try_again = false;
 206                 ConfigTagList tags = ConfTags("connect");
 207                 size_t i = 0;
 208                 for(ConfigIter it = tags.first; it != tags.second; ++it, ++i)
 209                 {
 210                         ConfigTag* tag = it->second;
 211                         if (Classes[i])
 212                                 continue;
 213
 214                         ConnectClass* parent = NULL;
 215                         std::string parentName = tag->getString("parent");
 216                         if (!parentName.empty())
 217                         {
 218                                 std::map<std::string, size_t>::const_iterator parentIter = names.find(parentName);
 219                                 if (parentIter == names.end())
 220                                 {
 221                                         try_again = true;
 222                                         // couldn't find parent this time. If it's the last time, we'll never find it.
 223                                         if (tries >= blk_count)
 224                                                 throw CoreException("Could not find parent connect class \"" + parentName + "\" for connect block at " + tag->getTagLocation());
 225                                         continue;
 226                                 }
 227                                 parent = Classes[parentIter->second];
 228                         }
 229
 230                         std::string name = tag->getString("name");
 231                         std::string mask, typeMask;
 232                         char type;
 233
 234                         if (tag->readString("allow", mask, false))
 235                         {
 236                                 type = CC_ALLOW;
 237                                 typeMask = 'a' + mask;
 238                         }
 239                         else if (tag->readString("deny", mask, false))
 240                         {
 241                                 type = CC_DENY;
 242                                 typeMask = 'd' + mask;
 243                         }
 244                         else if (!name.empty())
 245                         {
 246                                 type = CC_NAMED;
 247                                 mask = name;
 248                                 typeMask = 'n' + mask;
 249                         }
 250                         else
 251                         {
 252                                 throw CoreException("Connect class must have allow, deny, or name specified at " + tag->getTagLocation());
 253                         }
 254
 255                         if (name.empty())
 256                         {
 257                                 name = "unnamed-" + ConvToStr(i);
 258                         }
 259                         else
 260                         {
 261                                 typeMask = 'n' + name;
 262                         }
 263
 264                         if (names.find(name) != names.end())
 265                                 throw CoreException("Two connect classes with name \"" + name + "\" defined!");
 266                         names[name] = i;
 267
 268                         ConnectClass* me = parent ?
 269                                 new ConnectClass(tag, type, mask, *parent) :
 270                                 new ConnectClass(tag, type, mask);
 271
 272                         me->name = name;
 273
 274                         me->registration_timeout = tag->getDuration("timeout", me->registration_timeout);
 275                         me->pingtime = tag->getDuration("pingfreq", me->pingtime);
 276                         std::string sendq;
 277                         if (tag->readString("sendq", sendq))
 278                         {
 279                                 // attempt to guess a good hard/soft sendq from a single value
 280                                 unsigned long value = strtoul(sendq.c_str(), NULL, 10);
 281                                 if (value > 16384)
 282                                         me->softsendqmax = value / 16;
 283                                 else
 284                                         me->softsendqmax = value;
 285                                 me->hardsendqmax = value * 8;
 286                         }
 287                         me->softsendqmax = tag->getUInt("softsendq", me->softsendqmax);
 288                         me->hardsendqmax = tag->getUInt("hardsendq", me->hardsendqmax);
 289                         me->recvqmax = tag->getUInt("recvq", me->recvqmax);
 290                         me->penaltythreshold = tag->getUInt("threshold", me->penaltythreshold);
 291                         me->commandrate = tag->getUInt("commandrate", me->commandrate);
 292                         me->fakelag = tag->getBool("fakelag", me->fakelag);
 293                         me->maxlocal = tag->getUInt("localmax", me->maxlocal);
 294                         me->maxglobal = tag->getUInt("globalmax", me->maxglobal);
 295                         me->maxchans = tag->getUInt("maxchans", me->maxchans);
 296                         me->maxconnwarn = tag->getBool("maxconnwarn", me->maxconnwarn);
 297                         me->limit = tag->getUInt("limit", me->limit);
 298                         me->resolvehostnames = tag->getBool("resolvehostnames", me->resolvehostnames);
 299
 300                         std::string ports = tag->getString("port");
 301                         if (!ports.empty())
 302                         {
 303                                 irc::portparser portrange(ports, false);
 304                                 while (int port = portrange.GetToken())
 305                                         me->ports.insert(port);
 306                         }
 307
 308                         ClassMap::iterator oldMask = oldBlocksByMask.find(typeMask);
 309                         if (oldMask != oldBlocksByMask.end())
 310                         {
 311                                 ConnectClass* old = oldMask->second;
 312                                 oldBlocksByMask.erase(oldMask);
 313                                 old->Update(me);
 314                                 delete me;
 315                                 me = old;
 316                         }
 317                         Classes[i] = me;
 318                 }
 319         }
 320 }
 321
 322 static std::string GetServerName()
 323 {
 324 #ifndef _WIN32
 325         char hostname[256];
 326         if (gethostname(hostname, sizeof(hostname)) == 0)
 327         {
 328                 std::string name(hostname);
 329                 if (name.find('.') == std::string::npos)
 330                         name.push_back('.');
 331
 332                 if (name.length() <= ServerInstance->Config->Limits.MaxHost && InspIRCd::IsHost(name))
 333                         return name;
 334         }
 335 #endif
 336         return "irc.example.com";
 337 }
 338
 339 void ServerConfig::Fill()
 340 {
 341         ConfigTag* options = ConfValue("options");
 342         ConfigTag* security = ConfValue("security");
 343         ConfigTag* server = ConfValue("server");
 344         if (sid.empty())
 345         {
 346                 ServerName = server->getString("name", GetServerName(), InspIRCd::IsHost);
 347
 348                 sid = server->getString("id");
 349                 if (!sid.empty() && !InspIRCd::IsSID(sid))
 350                         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.");
 351
 352                 CaseMapping = options->getString("casemapping", "rfc1459");
 353                 if (CaseMapping == "ascii")
 354                         national_case_insensitive_map = ascii_case_insensitive_map;
 355                 else if (CaseMapping == "rfc1459")
 356                         national_case_insensitive_map = rfc_case_insensitive_map;
 357                 else
 358                         throw CoreException("<options:casemapping> must be set to 'ascii', or 'rfc1459'");
 359         }
 360         else
 361         {
 362                 std::string name = server->getString("name");
 363                 if (!name.empty() && name != ServerName)
 364                         throw CoreException("You must restart to change the server name");
 365
 366                 std::string nsid = server->getString("id");
 367                 if (!nsid.empty() && nsid != sid)
 368                         throw CoreException("You must restart to change the server id");
 369
 370                 std::string casemapping = options->getString("casemapping");
 371                 // Ignore this value if CaseMapping is set to something the core doesn't provide (i.e., m_nationalchars).
 372                 if (!casemapping.empty() && casemapping != CaseMapping && (CaseMapping == "ascii" || CaseMapping == "rfc1459"))
 373                         throw CoreException("You must restart to change the server casemapping");
 374
 375         }
 376         SoftLimit = ConfValue("performance")->getUInt("softlimit", (SocketEngine::GetMaxFds() > 0 ? SocketEngine::GetMaxFds() : LONG_MAX), 10);
 377         CCOnConnect = ConfValue("performance")->getBool("clonesonconnect", true);
 378         MaxConn = ConfValue("performance")->getUInt("somaxconn", SOMAXCONN);
 379         TimeSkipWarn = ConfValue("performance")->getDuration("timeskipwarn", 2, 0, 30);
 380         XLineMessage = options->getString("xlinemessage", options->getString("moronbanner", "You're banned!"));
 381         ServerDesc = server->getString("description", "Configure Me");
 382         Network = server->getString("network", "Network");
 383         NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240, 1024, 65534);
 384         CustomVersion = security->getString("customversion");
 385         HideBans = security->getBool("hidebans");
 386         HideServer = security->getString("hideserver", security->getString("hidewhois"));
 387         SyntaxHints = options->getBool("syntaxhints");
 388         FullHostInTopic = options->getBool("hostintopic");
 389         MaxTargets = security->getUInt("maxtargets", 20, 1, 31);
 390         DefaultModes = options->getString("defaultmodes", "not");
 391         PID = ConfValue("pid")->getString("file");
 392         MaxChans = ConfValue("channels")->getUInt("users", 20);
 393         OperMaxChans = ConfValue("channels")->getUInt("opers", 0);
 394         c_ipv4_range = ConfValue("cidr")->getUInt("ipv4clone", 32, 1, 32);
 395         c_ipv6_range = ConfValue("cidr")->getUInt("ipv6clone", 128, 1, 128);
 396         Limits = ServerLimits(ConfValue("limits"));
 397         Paths = ServerPaths(ConfValue("path"));
 398         NoSnoticeStack = options->getBool("nosnoticestack", false);
 399
 400         std::string defbind = options->getString("defaultbind");
 401         if (stdalgo::string::equalsci(defbind, "ipv4"))
 402         {
 403                 WildcardIPv6 = false;
 404         }
 405         else if (stdalgo::string::equalsci(defbind, "ipv6"))
 406         {
 407                 WildcardIPv6 = true;
 408         }
 409         else
 410         {
 411                 WildcardIPv6 = true;
 412                 int socktest = socket(AF_INET6, SOCK_STREAM, 0);
 413                 if (socktest < 0)
 414                         WildcardIPv6 = false;
 415                 else
 416                         SocketEngine::Close(socktest);
 417         }
 418
 419         ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
 420         ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
 421         ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
 422         ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));
 423
 424         const std::string restrictbannedusers = options->getString("restrictbannedusers", "yes");
 425         if (stdalgo::string::equalsci(restrictbannedusers, "no"))
 426                 RestrictBannedUsers = ServerConfig::BUT_NORMAL;
 427         else if (stdalgo::string::equalsci(restrictbannedusers, "silent"))
 428                 RestrictBannedUsers = ServerConfig::BUT_RESTRICT_SILENT;
 429         else if (stdalgo::string::equalsci(restrictbannedusers, "yes"))
 430                 RestrictBannedUsers =  ServerConfig::BUT_RESTRICT_NOTIFY;
 431         else
 432                 throw CoreException(restrictbannedusers + " is an invalid <options:restrictbannedusers> value, at " + options->getTagLocation());
 433 }
 434
 435 // WARNING: it is not safe to use most of the codebase in this function, as it
 436 // will run in the config reader thread
 437 void ServerConfig::Read()
 438 {
 439         /* Load and parse the config file, if there are any errors then explode */
 440
 441         ParseStack stack(this);
 442         try
 443         {
 444                 valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
 445         }
 446         catch (CoreException& err)
 447         {
 448                 valid = false;
 449                 errstr << err.GetReason() << std::endl;
 450         }
 451 }
 452
 453 void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
 454 {
 455         valid = true;
 456         if (old)
 457         {
 458                 /*
 459                  * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
 460                  */
 461                 this->CaseMapping = old->CaseMapping;
 462                 this->ServerName = old->ServerName;
 463                 this->sid = old->sid;
 464                 this->cmdline = old->cmdline;
 465         }
 466
 467         /* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
 468         try
 469         {
 470                 // Ensure the user has actually edited ther config.
 471                 ConfigTagList dietags = ConfTags("die");
 472                 if (dietags.first != dietags.second)
 473                 {
 474                         errstr << "Your configuration has not been edited correctly!" << std::endl;
 475                         for (ConfigIter iter = dietags.first; iter != dietags.second; ++iter)
 476                         {
 477                                 ConfigTag* tag = iter->second;
 478                                 const std::string reason = tag->getString("reason", "You left a <die> tag in your config", 1);
 479                                 errstr << reason <<  " (at " << tag->getTagLocation() << ")" << std::endl;
 480                         }
 481                 }
 482
 483                 Fill();
 484
 485                 // Handle special items
 486                 CrossCheckOperClassType();
 487                 CrossCheckConnectBlocks(old);
 488         }
 489         catch (CoreException &ce)
 490         {
 491                 errstr << ce.GetReason() << std::endl;
 492         }
 493
 494         // Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
 495         valid = errstr.str().empty();
 496
 497         // write once here, to try it out and make sure its ok
 498         if (valid)
 499                 ServerInstance->WritePID(this->PID, !old);
 500
 501         ConfigTagList binds = ConfTags("bind");
 502         if (binds.first == binds.second)
 503                  errstr << "Possible configuration error: you have not defined any <bind> blocks." << std::endl
 504                          << "You will need to do this if you want clients to be able to connect!" << std::endl;
 505
 506         if (old && valid)
 507         {
 508                 // On first run, ports are bound later on
 509                 FailedPortList pl;
 510                 ServerInstance->BindPorts(pl);
 511                 if (pl.size())
 512                 {
 513                         std::cout << "Warning! Some of your listener" << (pl.size() == 1 ? "s" : "") << " failed to bind:" << std::endl;
 514                         for (FailedPortList::const_iterator iter = pl.begin(); iter != pl.end(); ++iter)
 515                         {
 516                                 const FailedPort& fp = *iter;
 517                                 errstr << "  " << fp.sa.str() << ": " << strerror(fp.error) << std::endl
 518                                         << "  " << "Created from <bind> tag at " << fp.tag->getTagLocation() << std::endl;
 519                         }
 520                 }
 521         }
 522
 523         User* user = useruid.empty() ? NULL : ServerInstance->FindNick(useruid);
 524
 525         if (!valid)
 526         {
 527                 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "There were errors in your configuration file:");
 528                 Classes.clear();
 529         }
 530
 531         while (errstr.good())
 532         {
 533                 std::string line;
 534                 getline(errstr, line, '\n');
 535                 if (line.empty())
 536                         continue;
 537                 // On startup, print out to console (still attached at this point)
 538                 if (!old)
 539                         std::cout << line << std::endl;
 540                 // If a user is rehashing, tell them directly
 541                 if (user)
 542                         user->WriteRemoteNotice(InspIRCd::Format("*** %s", line.c_str()));
 543                 // Also tell opers
 544                 ServerInstance->SNO->WriteGlobalSno('a', line);
 545         }
 546
 547         errstr.clear();
 548         errstr.str(std::string());
 549
 550         /* No old configuration -> initial boot, nothing more to do here */
 551         if (!old)
 552         {
 553                 if (!valid)
 554                 {
 555                         ServerInstance->Exit(EXIT_STATUS_CONFIG);
 556                 }
 557
 558                 return;
 559         }
 560
 561
 562         // If there were errors processing configuration, don't touch modules.
 563         if (!valid)
 564                 return;
 565
 566         ApplyModules(user);
 567
 568         if (user)
 569                 user->WriteRemoteNotice("*** Successfully rehashed server.");
 570         ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
 571 }
 572
 573 void ServerConfig::ApplyModules(User* user)
 574 {
 575         std::vector<std::string> added_modules;
 576         ModuleManager::ModuleMap removed_modules = ServerInstance->Modules->GetModules();
 577
 578         ConfigTagList tags = ConfTags("module");
 579         for(ConfigIter i = tags.first; i != tags.second; ++i)
 580         {
 581                 ConfigTag* tag = i->second;
 582                 std::string name;
 583                 if (tag->readString("name", name))
 584                 {
 585                         name = ModuleManager::ExpandModName(name);
 586                         // if this module is already loaded, the erase will succeed, so we need do nothing
 587                         // otherwise, we need to add the module (which will be done later)
 588                         if (removed_modules.erase(name) == 0)
 589                                 added_modules.push_back(name);
 590                 }
 591         }
 592
 593         for (ModuleManager::ModuleMap::iterator i = removed_modules.begin(); i != removed_modules.end(); ++i)
 594         {
 595                 const std::string& modname = i->first;
 596                 // Don't remove core_*.so, just remove m_*.so
 597                 if (InspIRCd::Match(modname, "core_*.so", ascii_case_insensitive_map))
 598                         continue;
 599                 if (ServerInstance->Modules->Unload(i->second))
 600                 {
 601                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s", modname.c_str());
 602
 603                         if (user)
 604                                 user->WriteNumeric(RPL_UNLOADEDMODULE, modname, InspIRCd::Format("Module %s successfully unloaded.", modname.c_str()));
 605                         else
 606                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully unloaded.", modname.c_str());
 607                 }
 608                 else
 609                 {
 610                         if (user)
 611                                 user->WriteNumeric(ERR_CANTUNLOADMODULE, modname, InspIRCd::Format("Failed to unload module %s: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str()));
 612                         else
 613                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload module %s: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str());
 614                 }
 615         }
 616
 617         for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 618         {
 619                 // Skip modules which are already loaded.
 620                 if (ServerInstance->Modules->Find(*adding))
 621                         continue;
 622
 623                 if (ServerInstance->Modules->Load(*adding))
 624                 {
 625                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
 626                         if (user)
 627                                 user->WriteNumeric(RPL_LOADEDMODULE, *adding, InspIRCd::Format("Module %s successfully loaded.", adding->c_str()));
 628                         else
 629                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully loaded.", adding->c_str());
 630                 }
 631                 else
 632                 {
 633                         if (user)
 634                                 user->WriteNumeric(ERR_CANTLOADMODULE, *adding, InspIRCd::Format("Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str()));
 635                         else
 636                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
 637                 }
 638         }
 639 }
 640
 641 ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 642 {
 643         ConfigTagList found = config_data.equal_range(tag);
 644         if (found.first == found.second)
 645                 return EmptyTag;
 646         ConfigTag* rv = found.first->second;
 647         found.first++;
 648         if (found.first != found.second)
 649                 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
 650                         "(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
 651         return rv;
 652 }
 653
 654 ConfigTagList ServerConfig::ConfTags(const std::string& tag)
 655 {
 656         return config_data.equal_range(tag);
 657 }
 658
 659 std::string ServerConfig::Escape(const std::string& str, bool xml)
 660 {
 661         std::string escaped;
 662         for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
 663         {
 664                 switch (*it)
 665                 {
 666                         case '"':
 667                                 escaped += xml ? "&quot;" : "\"";
 668                                 break;
 669                         case '&':
 670                                 escaped += xml ? "&amp;" : "&";
 671                                 break;
 672                         case '\\':
 673                                 escaped += xml ? "\\" : "\\\\";
 674                                 break;
 675                         default:
 676                                 escaped += *it;
 677                                 break;
 678                 }
 679         }
 680         return escaped;
 681 }
 682
 683 void ConfigReaderThread::Run()
 684 {
 685         Config->Read();
 686         done = true;
 687 }
 688
 689 void ConfigReaderThread::Finish()
 690 {
 691         ServerConfig* old = ServerInstance->Config;
 692         ServerInstance->Logs->Log("CONFIG", LOG_DEBUG, "Switching to new configuration...");
 693         ServerInstance->Config = this->Config;
 694         Config->Apply(old, TheUserUID);
 695
 696         if (Config->valid)
 697         {
 698                 /*
 699                  * Apply the changed configuration from the rehash.
 700                  *
 701                  * XXX: The order of these is IMPORTANT, do not reorder them without testing
 702                  * thoroughly!!!
 703                  */
 704                 ServerInstance->Users.RehashCloneCounts();
 705                 ServerInstance->XLines->CheckELines();
 706                 ServerInstance->XLines->ApplyLines();
 707                 User* user = ServerInstance->FindNick(TheUserUID);
 708
 709                 ConfigStatus status(user);
 710                 const ModuleManager::ModuleMap& mods = ServerInstance->Modules->GetModules();
 711                 for (ModuleManager::ModuleMap::const_iterator i = mods.begin(); i != mods.end(); ++i)
 712                 {
 713                         try
 714                         {
 715                                 ServerInstance->Logs->Log("MODULE", LOG_DEBUG, "Rehashing " + i->first);
 716                                 i->second->ReadConfig(status);
 717                         }
 718                         catch (CoreException& modex)
 719                         {
 720                                 ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Exception caught: " + modex.GetReason());
 721                                 if (user)
 722                                         user->WriteNotice(i->first + ": " + modex.GetReason());
 723                         }
 724                 }
 725
 726                 // The description of this server may have changed - update it for WHOIS etc.
 727                 ServerInstance->FakeClient->server->description = Config->ServerDesc;
 728
 729                 ServerInstance->ISupport.Build();
 730
 731                 ServerInstance->Logs->CloseLogs();
 732                 ServerInstance->Logs->OpenFileLogs();
 733
 734                 if (Config->RawLog && !old->RawLog)
 735                         ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 736
 737                 Config = old;
 738         }
 739         else
 740         {
 741                 // whoops, abort!
 742                 ServerInstance->Config = old;
 743         }
 744 }