src/configreader.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2019 Matt Schatz <genius3000@g3k.solutions>
   5  *   Copyright (C) 2013-2016 Attila Molnar <attilamolnar@hush.com>
   6  *   Copyright (C) 2013-2014, 2016-2020 Sadie Powell <sadie@witchery.services>
   7  *   Copyright (C) 2013 Daniel Vassdal <shutter@canternet.org>
   8  *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
   9  *   Copyright (C) 2012 Justin Crawford <Justasic@Gmail.com>
  10  *   Copyright (C) 2012 DjSlash <djslash@djslash.org>
  11  *   Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
  12  *   Copyright (C) 2009-2011 Daniel De Graaf <danieldg@inspircd.org>
  13  *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
  14  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
  15  *   Copyright (C) 2007-2010 Robin Burchell <robin+git@viroteck.net>
  16  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
  17  *   Copyright (C) 2006-2008 Craig Edwards <brain@inspircd.org>
  18  *
  19  * This file is part of InspIRCd.  InspIRCd is free software: you can
  20  * redistribute it and/or modify it under the terms of the GNU General Public
  21  * License as published by the Free Software Foundation, version 2.
  22  *
  23  * This program is distributed in the hope that it will be useful, but WITHOUT
  24  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  25  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  26  * details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  30  */
  31
  32
  33 #include "inspircd.h"
  34 #include "xline.h"
  35 #include "listmode.h"
  36 #include "exitcodes.h"
  37 #include "configparser.h"
  38 #include <iostream>
  39
  40 ServerLimits::ServerLimits(ConfigTag* tag)
  41         : MaxLine(tag->getUInt("maxline", 512, 512))
  42         , NickMax(tag->getUInt("maxnick", 30, 1, MaxLine))
  43         , ChanMax(tag->getUInt("maxchan", 64, 1, MaxLine))
  44         , MaxModes(tag->getUInt("maxmodes", 20, 1))
  45         , IdentMax(tag->getUInt("maxident", 10, 1))
  46         , MaxQuit(tag->getUInt("maxquit", 255, 0, MaxLine))
  47         , MaxTopic(tag->getUInt("maxtopic", 307, 1, MaxLine))
  48         , MaxKick(tag->getUInt("maxkick", 255, 1, MaxLine))
  49         , MaxReal(tag->getUInt("maxreal", tag->getUInt("maxgecos", 128), 1, MaxLine))
  50         , MaxAway(tag->getUInt("maxaway", 200, 1, MaxLine))
  51         , MaxHost(tag->getUInt("maxhost", 64, 1, MaxLine))
  52 {
  53 }
  54
  55 ServerConfig::ServerPaths::ServerPaths(ConfigTag* tag)
  56         : Config(tag->getString("configdir", INSPIRCD_CONFIG_PATH, 1))
  57         , Data(tag->getString("datadir", INSPIRCD_DATA_PATH, 1))
  58         , Log(tag->getString("logdir", INSPIRCD_LOG_PATH, 1))
  59         , Module(tag->getString("moduledir", INSPIRCD_MODULE_PATH, 1))
  60 {
  61 }
  62
  63 static ConfigTag* CreateEmptyTag()
  64 {
  65         ConfigItems* items;
  66         return ConfigTag::create("empty", "<auto>", 0, items);
  67 }
  68
  69 ServerConfig::ServerConfig()
  70         : EmptyTag(CreateEmptyTag())
  71         , Limits(EmptyTag)
  72         , Paths(EmptyTag)
  73         , RawLog(false)
  74         , NoSnoticeStack(false)
  75 {
  76 }
  77
  78 ServerConfig::~ServerConfig()
  79 {
  80         delete EmptyTag;
  81 }
  82
  83 static void ReadXLine(ServerConfig* conf, const std::string& tag, const std::string& key, XLineFactory* make)
  84 {
  85         insp::flat_set<std::string> configlines;
  86
  87         ConfigTagList tags = conf->ConfTags(tag);
  88         for(ConfigIter i = tags.first; i != tags.second; ++i)
  89         {
  90                 ConfigTag* ctag = i->second;
  91
  92                 const std::string mask = ctag->getString(key);
  93                 if (mask.empty())
  94                         throw CoreException("<" + tag + ":" + key + "> missing at " + ctag->getTagLocation());
  95
  96                 const std::string reason = ctag->getString("reason");
  97                 if (reason.empty())
  98                         throw CoreException("<" + tag + ":reason> missing at " + ctag->getTagLocation());
  99
 100                 XLine* xl = make->Generate(ServerInstance->Time(), 0, ServerInstance->Config->ServerName, reason, mask);
 101                 xl->from_config = true;
 102                 configlines.insert(xl->Displayable());
 103                 if (!ServerInstance->XLines->AddLine(xl, NULL))
 104                         delete xl;
 105         }
 106
 107         ServerInstance->XLines->ExpireRemovedConfigLines(make->GetType(), configlines);
 108 }
 109
 110 typedef std::map<std::string, ConfigTag*> LocalIndex;
 111 void ServerConfig::CrossCheckOperClassType()
 112 {
 113         LocalIndex operclass;
 114         ConfigTagList tags = ConfTags("class");
 115         for(ConfigIter i = tags.first; i != tags.second; ++i)
 116         {
 117                 ConfigTag* tag = i->second;
 118                 std::string name = tag->getString("name");
 119                 if (name.empty())
 120                         throw CoreException("<class:name> missing from tag at " + tag->getTagLocation());
 121                 if (operclass.find(name) != operclass.end())
 122                         throw CoreException("Duplicate class block with name " + name + " at " + tag->getTagLocation());
 123                 operclass[name] = tag;
 124         }
 125         tags = ConfTags("type");
 126         for(ConfigIter i = tags.first; i != tags.second; ++i)
 127         {
 128                 ConfigTag* tag = i->second;
 129                 std::string name = tag->getString("name");
 130                 if (name.empty())
 131                         throw CoreException("<type:name> is missing from tag at " + tag->getTagLocation());
 132                 if (OperTypes.find(name) != OperTypes.end())
 133                         throw CoreException("Duplicate type block with name " + name + " at " + tag->getTagLocation());
 134
 135                 OperInfo* ifo = new OperInfo(name);
 136                 OperTypes[name] = ifo;
 137                 ifo->type_block = tag;
 138
 139                 std::string classname;
 140                 irc::spacesepstream str(tag->getString("classes"));
 141                 while (str.GetToken(classname))
 142                 {
 143                         LocalIndex::iterator cls = operclass.find(classname);
 144                         if (cls == operclass.end())
 145                                 throw CoreException("Oper type " + name + " has missing class " + classname);
 146                         ifo->class_blocks.push_back(cls->second);
 147                 }
 148         }
 149
 150         tags = ConfTags("oper");
 151         for(ConfigIter i = tags.first; i != tags.second; ++i)
 152         {
 153                 ConfigTag* tag = i->second;
 154
 155                 std::string name = tag->getString("name");
 156                 if (name.empty())
 157                         throw CoreException("<oper:name> missing from tag at " + tag->getTagLocation());
 158
 159                 std::string type = tag->getString("type");
 160                 OperIndex::iterator tblk = OperTypes.find(type);
 161                 if (tblk == OperTypes.end())
 162                         throw CoreException("Oper block " + name + " has missing type " + type);
 163                 if (oper_blocks.find(name) != oper_blocks.end())
 164                         throw CoreException("Duplicate oper block with name " + name + " at " + tag->getTagLocation());
 165
 166                 OperInfo* ifo = new OperInfo(type);
 167                 ifo->oper_block = tag;
 168                 ifo->type_block = tblk->second->type_block;
 169                 ifo->class_blocks.assign(tblk->second->class_blocks.begin(), tblk->second->class_blocks.end());
 170                 oper_blocks[name] = ifo;
 171         }
 172 }
 173
 174 void ServerConfig::CrossCheckConnectBlocks(ServerConfig* current)
 175 {
 176         typedef std::map<std::string, ConnectClass*> ClassMap;
 177         ClassMap oldBlocksByMask;
 178         if (current)
 179         {
 180                 for(ClassVector::iterator i = current->Classes.begin(); i != current->Classes.end(); ++i)
 181                 {
 182                         ConnectClass* c = *i;
 183                         if (c->name.compare(0, 8, "unnamed-", 8))
 184                         {
 185                                 oldBlocksByMask["n" + c->name] = c;
 186                         }
 187                         else if (c->type == CC_ALLOW || c->type == CC_DENY)
 188                         {
 189                                 std::string typeMask = (c->type == CC_ALLOW) ? "a" : "d";
 190                                 typeMask += c->host;
 191                                 oldBlocksByMask[typeMask] = c;
 192                         }
 193                 }
 194         }
 195
 196         size_t blk_count = config_data.count("connect");
 197         if (blk_count == 0)
 198         {
 199                 // No connect blocks found; make a trivial default block
 200                 ConfigItems* items;
 201                 ConfigTag* tag = ConfigTag::create("connect", "<auto>", 0, items);
 202                 (*items)["allow"] = "*";
 203                 config_data.insert(std::make_pair("connect", tag));
 204                 blk_count = 1;
 205         }
 206
 207         Classes.resize(blk_count);
 208         std::map<std::string, size_t> names;
 209
 210         bool try_again = true;
 211         for(size_t tries = 0; try_again; tries++)
 212         {
 213                 try_again = false;
 214                 ConfigTagList tags = ConfTags("connect");
 215                 size_t i = 0;
 216                 for(ConfigIter it = tags.first; it != tags.second; ++it, ++i)
 217                 {
 218                         ConfigTag* tag = it->second;
 219                         if (Classes[i])
 220                                 continue;
 221
 222                         ConnectClass* parent = NULL;
 223                         std::string parentName = tag->getString("parent");
 224                         if (!parentName.empty())
 225                         {
 226                                 std::map<std::string, size_t>::const_iterator parentIter = names.find(parentName);
 227                                 if (parentIter == names.end())
 228                                 {
 229                                         try_again = true;
 230                                         // couldn't find parent this time. If it's the last time, we'll never find it.
 231                                         if (tries >= blk_count)
 232                                                 throw CoreException("Could not find parent connect class \"" + parentName + "\" for connect block at " + tag->getTagLocation());
 233                                         continue;
 234                                 }
 235                                 parent = Classes[parentIter->second];
 236                         }
 237
 238                         std::string name = tag->getString("name");
 239                         std::string mask, typeMask;
 240                         char type;
 241
 242                         if (tag->readString("allow", mask, false))
 243                         {
 244                                 type = CC_ALLOW;
 245                                 typeMask = 'a' + mask;
 246                         }
 247                         else if (tag->readString("deny", mask, false))
 248                         {
 249                                 type = CC_DENY;
 250                                 typeMask = 'd' + mask;
 251                         }
 252                         else if (!name.empty())
 253                         {
 254                                 type = CC_NAMED;
 255                                 mask = name;
 256                                 typeMask = 'n' + mask;
 257                         }
 258                         else
 259                         {
 260                                 throw CoreException("Connect class must have allow, deny, or name specified at " + tag->getTagLocation());
 261                         }
 262
 263                         if (name.empty())
 264                         {
 265                                 name = "unnamed-" + ConvToStr(i);
 266                         }
 267                         else
 268                         {
 269                                 typeMask = 'n' + name;
 270                         }
 271
 272                         if (names.find(name) != names.end())
 273                                 throw CoreException("Two connect classes with name \"" + name + "\" defined!");
 274                         names[name] = i;
 275
 276                         ConnectClass* me = parent ?
 277                                 new ConnectClass(tag, type, mask, *parent) :
 278                                 new ConnectClass(tag, type, mask);
 279
 280                         me->name = name;
 281
 282                         me->registration_timeout = tag->getDuration("timeout", me->registration_timeout);
 283                         me->pingtime = tag->getDuration("pingfreq", me->pingtime);
 284                         std::string sendq;
 285                         if (tag->readString("sendq", sendq))
 286                         {
 287                                 // attempt to guess a good hard/soft sendq from a single value
 288                                 unsigned long value = strtoul(sendq.c_str(), NULL, 10);
 289                                 if (value > 16384)
 290                                         me->softsendqmax = value / 16;
 291                                 else
 292                                         me->softsendqmax = value;
 293                                 me->hardsendqmax = value * 8;
 294                         }
 295                         me->softsendqmax = tag->getUInt("softsendq", me->softsendqmax);
 296                         me->hardsendqmax = tag->getUInt("hardsendq", me->hardsendqmax);
 297                         me->recvqmax = tag->getUInt("recvq", me->recvqmax);
 298                         me->penaltythreshold = tag->getUInt("threshold", me->penaltythreshold);
 299                         me->commandrate = tag->getUInt("commandrate", me->commandrate);
 300                         me->fakelag = tag->getBool("fakelag", me->fakelag);
 301                         me->maxlocal = tag->getUInt("localmax", me->maxlocal);
 302                         me->maxglobal = tag->getUInt("globalmax", me->maxglobal);
 303                         me->maxchans = tag->getUInt("maxchans", me->maxchans);
 304                         me->maxconnwarn = tag->getBool("maxconnwarn", me->maxconnwarn);
 305                         me->limit = tag->getUInt("limit", me->limit);
 306                         me->resolvehostnames = tag->getBool("resolvehostnames", me->resolvehostnames);
 307                         me->password = tag->getString("password", me->password);
 308
 309                         me->passwordhash = tag->getString("hash", me->passwordhash);
 310                         if (!me->password.empty() && (me->passwordhash.empty() || stdalgo::string::equalsci(me->passwordhash, "plaintext")))
 311                         {
 312                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEFAULT, "<connect> tag '%s' at %s contains an plain text password, this is insecure!",
 313                                         name.c_str(), tag->getTagLocation().c_str());
 314                         }
 315
 316                         std::string ports = tag->getString("port");
 317                         if (!ports.empty())
 318                         {
 319                                 irc::portparser portrange(ports, false);
 320                                 while (int port = portrange.GetToken())
 321                                         me->ports.insert(port);
 322                         }
 323
 324                         ClassMap::iterator oldMask = oldBlocksByMask.find(typeMask);
 325                         if (oldMask != oldBlocksByMask.end())
 326                         {
 327                                 ConnectClass* old = oldMask->second;
 328                                 oldBlocksByMask.erase(oldMask);
 329                                 old->Update(me);
 330                                 delete me;
 331                                 me = old;
 332                         }
 333                         Classes[i] = me;
 334                 }
 335         }
 336 }
 337
 338 static std::string GetServerName()
 339 {
 340 #ifndef _WIN32
 341         char hostname[256];
 342         if (gethostname(hostname, sizeof(hostname)) == 0)
 343         {
 344                 std::string name(hostname);
 345                 if (name.find('.') == std::string::npos)
 346                         name.push_back('.');
 347
 348                 if (name.length() <= ServerInstance->Config->Limits.MaxHost && InspIRCd::IsHost(name))
 349                         return name;
 350         }
 351 #endif
 352         return "irc.example.com";
 353 }
 354
 355 void ServerConfig::Fill()
 356 {
 357         ConfigTag* options = ConfValue("options");
 358         ConfigTag* security = ConfValue("security");
 359         ConfigTag* server = ConfValue("server");
 360         if (sid.empty())
 361         {
 362                 ServerName = server->getString("name", GetServerName(), InspIRCd::IsHost);
 363
 364                 sid = server->getString("id");
 365                 if (!sid.empty() && !InspIRCd::IsSID(sid))
 366                         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.");
 367
 368                 CaseMapping = options->getString("casemapping", "rfc1459", 1);
 369                 if (CaseMapping == "ascii")
 370                         national_case_insensitive_map = ascii_case_insensitive_map;
 371                 else if (CaseMapping == "rfc1459")
 372                         national_case_insensitive_map = rfc_case_insensitive_map;
 373                 else
 374                         throw CoreException("<options:casemapping> must be set to 'ascii', or 'rfc1459'");
 375         }
 376         else
 377         {
 378                 std::string name = server->getString("name");
 379                 if (!name.empty() && name != ServerName)
 380                         throw CoreException("You must restart to change the server name");
 381
 382                 std::string nsid = server->getString("id");
 383                 if (!nsid.empty() && nsid != sid)
 384                         throw CoreException("You must restart to change the server id");
 385
 386                 std::string casemapping = options->getString("casemapping");
 387                 // Ignore this value if CaseMapping is set to something the core doesn't provide (i.e., m_nationalchars).
 388                 if (!casemapping.empty() && casemapping != CaseMapping && (CaseMapping == "ascii" || CaseMapping == "rfc1459"))
 389                         throw CoreException("You must restart to change the server casemapping");
 390
 391         }
 392         SoftLimit = ConfValue("performance")->getUInt("softlimit", (SocketEngine::GetMaxFds() > 0 ? SocketEngine::GetMaxFds() : LONG_MAX), 10);
 393         CCOnConnect = ConfValue("performance")->getBool("clonesonconnect", true);
 394         MaxConn = ConfValue("performance")->getUInt("somaxconn", SOMAXCONN);
 395         TimeSkipWarn = ConfValue("performance")->getDuration("timeskipwarn", 2, 0, 30);
 396         XLineMessage = options->getString("xlinemessage", options->getString("moronbanner", "You're banned!"));
 397         ServerDesc = server->getString("description", "Configure Me", 1);
 398         Network = server->getString("network", "Network", 1);
 399         NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240, 1024, 65534);
 400         CustomVersion = security->getString("customversion");
 401         HideBans = security->getBool("hidebans");
 402         HideServer = security->getString("hideserver", security->getString("hidewhois"));
 403         SyntaxHints = options->getBool("syntaxhints");
 404         FullHostInTopic = options->getBool("hostintopic");
 405         MaxTargets = security->getUInt("maxtargets", 20, 1, 31);
 406         DefaultModes = options->getString("defaultmodes", "not");
 407         PID = ConfValue("pid")->getString("file");
 408         MaxChans = ConfValue("channels")->getUInt("users", 20);
 409         OperMaxChans = ConfValue("channels")->getUInt("opers", 0);
 410         c_ipv4_range = ConfValue("cidr")->getUInt("ipv4clone", 32, 1, 32);
 411         c_ipv6_range = ConfValue("cidr")->getUInt("ipv6clone", 128, 1, 128);
 412         Limits = ServerLimits(ConfValue("limits"));
 413         Paths = ServerPaths(ConfValue("path"));
 414         NoSnoticeStack = options->getBool("nosnoticestack", false);
 415
 416         std::string defbind = options->getString("defaultbind");
 417         if (stdalgo::string::equalsci(defbind, "ipv4"))
 418         {
 419                 WildcardIPv6 = false;
 420         }
 421         else if (stdalgo::string::equalsci(defbind, "ipv6"))
 422         {
 423                 WildcardIPv6 = true;
 424         }
 425         else
 426         {
 427                 WildcardIPv6 = true;
 428                 int socktest = socket(AF_INET6, SOCK_STREAM, 0);
 429                 if (socktest < 0)
 430                         WildcardIPv6 = false;
 431                 else
 432                         SocketEngine::Close(socktest);
 433         }
 434
 435         ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
 436         ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
 437         ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
 438         ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));
 439
 440         const std::string restrictbannedusers = options->getString("restrictbannedusers", "yes", 1);
 441         if (stdalgo::string::equalsci(restrictbannedusers, "no"))
 442                 RestrictBannedUsers = ServerConfig::BUT_NORMAL;
 443         else if (stdalgo::string::equalsci(restrictbannedusers, "silent"))
 444                 RestrictBannedUsers = ServerConfig::BUT_RESTRICT_SILENT;
 445         else if (stdalgo::string::equalsci(restrictbannedusers, "yes"))
 446                 RestrictBannedUsers =  ServerConfig::BUT_RESTRICT_NOTIFY;
 447         else
 448                 throw CoreException(restrictbannedusers + " is an invalid <options:restrictbannedusers> value, at " + options->getTagLocation());
 449 }
 450
 451 // WARNING: it is not safe to use most of the codebase in this function, as it
 452 // will run in the config reader thread
 453 void ServerConfig::Read()
 454 {
 455         /* Load and parse the config file, if there are any errors then explode */
 456
 457         ParseStack stack(this);
 458         try
 459         {
 460                 valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
 461         }
 462         catch (CoreException& err)
 463         {
 464                 valid = false;
 465                 errstr << err.GetReason() << std::endl;
 466         }
 467 }
 468
 469 void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
 470 {
 471         valid = true;
 472         if (old)
 473         {
 474                 /*
 475                  * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
 476                  */
 477                 this->CaseMapping = old->CaseMapping;
 478                 this->ServerName = old->ServerName;
 479                 this->sid = old->sid;
 480                 this->cmdline = old->cmdline;
 481         }
 482
 483         /* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
 484         try
 485         {
 486                 // Ensure the user has actually edited ther config.
 487                 ConfigTagList dietags = ConfTags("die");
 488                 if (dietags.first != dietags.second)
 489                 {
 490                         errstr << "Your configuration has not been edited correctly!" << std::endl;
 491                         for (ConfigIter iter = dietags.first; iter != dietags.second; ++iter)
 492                         {
 493                                 ConfigTag* tag = iter->second;
 494                                 const std::string reason = tag->getString("reason", "You left a <die> tag in your config", 1);
 495                                 errstr << reason <<  " (at " << tag->getTagLocation() << ")" << std::endl;
 496                         }
 497                 }
 498
 499                 Fill();
 500
 501                 // Handle special items
 502                 CrossCheckOperClassType();
 503                 CrossCheckConnectBlocks(old);
 504         }
 505         catch (CoreException &ce)
 506         {
 507                 errstr << ce.GetReason() << std::endl;
 508         }
 509
 510         // Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
 511         valid = errstr.str().empty();
 512
 513         // write once here, to try it out and make sure its ok
 514         if (valid)
 515                 ServerInstance->WritePID(this->PID, !old);
 516
 517         ConfigTagList binds = ConfTags("bind");
 518         if (binds.first == binds.second)
 519                  errstr << "Possible configuration error: you have not defined any <bind> blocks." << std::endl
 520                          << "You will need to do this if you want clients to be able to connect!" << std::endl;
 521
 522         if (old && valid)
 523         {
 524                 // On first run, ports are bound later on
 525                 FailedPortList pl;
 526                 ServerInstance->BindPorts(pl);
 527                 if (pl.size())
 528                 {
 529                         std::cout << "Warning! Some of your listener" << (pl.size() == 1 ? "s" : "") << " failed to bind:" << std::endl;
 530                         for (FailedPortList::const_iterator iter = pl.begin(); iter != pl.end(); ++iter)
 531                         {
 532                                 const FailedPort& fp = *iter;
 533                                 errstr << "  " << fp.sa.str() << ": " << strerror(fp.error) << std::endl
 534                                         << "  " << "Created from <bind> tag at " << fp.tag->getTagLocation() << std::endl;
 535                         }
 536                 }
 537         }
 538
 539         User* user = useruid.empty() ? NULL : ServerInstance->FindUUID(useruid);
 540
 541         if (!valid)
 542         {
 543                 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "There were errors in your configuration file:");
 544                 Classes.clear();
 545         }
 546
 547         while (errstr.good())
 548         {
 549                 std::string line;
 550                 getline(errstr, line, '\n');
 551                 if (line.empty())
 552                         continue;
 553                 // On startup, print out to console (still attached at this point)
 554                 if (!old)
 555                         std::cout << line << std::endl;
 556                 // If a user is rehashing, tell them directly
 557                 if (user)
 558                         user->WriteRemoteNotice(InspIRCd::Format("*** %s", line.c_str()));
 559                 // Also tell opers
 560                 ServerInstance->SNO->WriteGlobalSno('a', line);
 561         }
 562
 563         errstr.clear();
 564         errstr.str(std::string());
 565
 566         /* No old configuration -> initial boot, nothing more to do here */
 567         if (!old)
 568         {
 569                 if (!valid)
 570                 {
 571                         ServerInstance->Exit(EXIT_STATUS_CONFIG);
 572                 }
 573
 574                 return;
 575         }
 576
 577
 578         // If there were errors processing configuration, don't touch modules.
 579         if (!valid)
 580                 return;
 581
 582         ApplyModules(user);
 583
 584         if (user)
 585                 user->WriteRemoteNotice("*** Successfully rehashed server.");
 586         ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
 587 }
 588
 589 void ServerConfig::ApplyModules(User* user)
 590 {
 591         std::vector<std::string> added_modules;
 592         ModuleManager::ModuleMap removed_modules = ServerInstance->Modules->GetModules();
 593
 594         ConfigTagList tags = ConfTags("module");
 595         for(ConfigIter i = tags.first; i != tags.second; ++i)
 596         {
 597                 ConfigTag* tag = i->second;
 598                 std::string name;
 599                 if (tag->readString("name", name))
 600                 {
 601                         name = ModuleManager::ExpandModName(name);
 602                         // if this module is already loaded, the erase will succeed, so we need do nothing
 603                         // otherwise, we need to add the module (which will be done later)
 604                         if (removed_modules.erase(name) == 0)
 605                                 added_modules.push_back(name);
 606                 }
 607         }
 608
 609         for (ModuleManager::ModuleMap::iterator i = removed_modules.begin(); i != removed_modules.end(); ++i)
 610         {
 611                 const std::string& modname = i->first;
 612                 // Don't remove core_*.so, just remove m_*.so
 613                 if (InspIRCd::Match(modname, "core_*.so", ascii_case_insensitive_map))
 614                         continue;
 615                 if (ServerInstance->Modules->Unload(i->second))
 616                 {
 617                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s", modname.c_str());
 618
 619                         if (user)
 620                                 user->WriteNumeric(RPL_UNLOADEDMODULE, modname, InspIRCd::Format("Module %s successfully unloaded.", modname.c_str()));
 621                         else
 622                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully unloaded.", modname.c_str());
 623                 }
 624                 else
 625                 {
 626                         if (user)
 627                                 user->WriteNumeric(ERR_CANTUNLOADMODULE, modname, InspIRCd::Format("Failed to unload module %s: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str()));
 628                         else
 629                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload module %s: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str());
 630                 }
 631         }
 632
 633         for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 634         {
 635                 // Skip modules which are already loaded.
 636                 if (ServerInstance->Modules->Find(*adding))
 637                         continue;
 638
 639                 if (ServerInstance->Modules->Load(*adding))
 640                 {
 641                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
 642                         if (user)
 643                                 user->WriteNumeric(RPL_LOADEDMODULE, *adding, InspIRCd::Format("Module %s successfully loaded.", adding->c_str()));
 644                         else
 645                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully loaded.", adding->c_str());
 646                 }
 647                 else
 648                 {
 649                         if (user)
 650                                 user->WriteNumeric(ERR_CANTLOADMODULE, *adding, InspIRCd::Format("Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str()));
 651                         else
 652                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
 653                 }
 654         }
 655 }
 656
 657 ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 658 {
 659         ConfigTagList found = config_data.equal_range(tag);
 660         if (found.first == found.second)
 661                 return EmptyTag;
 662         ConfigTag* rv = found.first->second;
 663         found.first++;
 664         if (found.first != found.second)
 665                 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
 666                         "(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
 667         return rv;
 668 }
 669
 670 ConfigTagList ServerConfig::ConfTags(const std::string& tag)
 671 {
 672         return config_data.equal_range(tag);
 673 }
 674
 675 std::string ServerConfig::Escape(const std::string& str, bool xml)
 676 {
 677         std::string escaped;
 678         for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
 679         {
 680                 switch (*it)
 681                 {
 682                         case '"':
 683                                 escaped += xml ? "&quot;" : "\"";
 684                                 break;
 685                         case '&':
 686                                 escaped += xml ? "&amp;" : "&";
 687                                 break;
 688                         case '\\':
 689                                 escaped += xml ? "\\" : "\\\\";
 690                                 break;
 691                         default:
 692                                 escaped += *it;
 693                                 break;
 694                 }
 695         }
 696         return escaped;
 697 }
 698
 699 void ConfigReaderThread::Run()
 700 {
 701         Config->Read();
 702         done = true;
 703 }
 704
 705 void ConfigReaderThread::Finish()
 706 {
 707         ServerConfig* old = ServerInstance->Config;
 708         ServerInstance->Logs->Log("CONFIG", LOG_DEBUG, "Switching to new configuration...");
 709         ServerInstance->Config = this->Config;
 710         Config->Apply(old, TheUserUID);
 711
 712         if (Config->valid)
 713         {
 714                 /*
 715                  * Apply the changed configuration from the rehash.
 716                  *
 717                  * XXX: The order of these is IMPORTANT, do not reorder them without testing
 718                  * thoroughly!!!
 719                  */
 720                 ServerInstance->Users.RehashCloneCounts();
 721                 ServerInstance->XLines->CheckELines();
 722                 ServerInstance->XLines->ApplyLines();
 723                 User* user = ServerInstance->FindUUID(TheUserUID);
 724
 725                 ConfigStatus status(user);
 726                 const ModuleManager::ModuleMap& mods = ServerInstance->Modules->GetModules();
 727                 for (ModuleManager::ModuleMap::const_iterator i = mods.begin(); i != mods.end(); ++i)
 728                 {
 729                         try
 730                         {
 731                                 ServerInstance->Logs->Log("MODULE", LOG_DEBUG, "Rehashing " + i->first);
 732                                 i->second->ReadConfig(status);
 733                         }
 734                         catch (CoreException& modex)
 735                         {
 736                                 ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Exception caught: " + modex.GetReason());
 737                                 if (user)
 738                                         user->WriteNotice(i->first + ": " + modex.GetReason());
 739                         }
 740                 }
 741
 742                 // The description of this server may have changed - update it for WHOIS etc.
 743                 ServerInstance->FakeClient->server->description = Config->ServerDesc;
 744
 745                 ServerInstance->ISupport.Build();
 746
 747                 ServerInstance->Logs->CloseLogs();
 748                 ServerInstance->Logs->OpenFileLogs();
 749
 750                 if (Config->RawLog && !old->RawLog)
 751                         ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 752
 753                 Config = old;
 754         }
 755         else
 756         {
 757                 // whoops, abort!
 758                 ServerInstance->Config = old;
 759         }
 760 }