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 /** Represents a deprecated configuration tag.
 338  */
 339 struct DeprecatedConfig
 340 {
 341         /** Tag name. */
 342         std::string tag;
 343
 344         /** Attribute key. */
 345         std::string key;
 346
 347         /** Attribute value. */
 348         std::string value;
 349
 350         /** Reason for deprecation. */
 351         std::string reason;
 352 };
 353
 354 static const DeprecatedConfig ChangedConfig[] = {
 355         { "bind",        "transport",   "",                 "has been moved to <bind:ssl> as of 2.0" },
 356         { "die",         "value",       "",                 "you need to reread your config" },
 357         { "gnutls",      "starttls",    "",                 "has been replaced with m_starttls as of 3.0" },
 358         { "link",        "autoconnect", "",                 "2.0+ does not use this attribute - define <autoconnect> tags instead" },
 359         { "link",        "transport",   "",                 "has been moved to <link:ssl> as of 2.0" },
 360         { "module",      "name",        "m_chanprotect.so", "has been replaced with m_customprefix as of 3.0" },
 361         { "module",      "name",        "m_halfop.so",      "has been replaced with m_customprefix as of 3.0" },
 362         { "options",     "cyclehosts",  "",                 "has been replaced with m_hostcycle as of 3.0" },
 363         { "performance", "nouserdns",   "",                 "has been moved to <connect:resolvehostnames> as of 3.0" }
 364 };
 365
 366 void ServerConfig::Fill()
 367 {
 368         ConfigTag* options = ConfValue("options");
 369         ConfigTag* security = ConfValue("security");
 370         ConfigTag* server = ConfValue("server");
 371         if (sid.empty())
 372         {
 373                 ServerName = server->getString("name", "irc.example.com", InspIRCd::IsHost);
 374
 375                 sid = server->getString("id");
 376                 if (!sid.empty() && !InspIRCd::IsSID(sid))
 377                         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.");
 378
 379                 CaseMapping = options->getString("casemapping", "rfc1459");
 380                 if (CaseMapping == "ascii")
 381                         national_case_insensitive_map = ascii_case_insensitive_map;
 382                 else if (CaseMapping == "rfc1459")
 383                         national_case_insensitive_map = rfc_case_insensitive_map;
 384                 else
 385                         throw CoreException("<options:casemapping> must be set to 'ascii', or 'rfc1459'");
 386         }
 387         else
 388         {
 389                 std::string name = server->getString("name");
 390                 if (!name.empty() && name != ServerName)
 391                         throw CoreException("You must restart to change the server name");
 392
 393                 std::string nsid = server->getString("id");
 394                 if (!nsid.empty() && nsid != sid)
 395                         throw CoreException("You must restart to change the server id");
 396
 397                 std::string casemapping = options->getString("casemapping");
 398                 if (!casemapping.empty() && casemapping != CaseMapping)
 399                         throw CoreException("You must restart to change the server casemapping");
 400
 401         }
 402         SoftLimit = ConfValue("performance")->getUInt("softlimit", (SocketEngine::GetMaxFds() > 0 ? SocketEngine::GetMaxFds() : LONG_MAX), 10);
 403         CCOnConnect = ConfValue("performance")->getBool("clonesonconnect", true);
 404         MaxConn = ConfValue("performance")->getUInt("somaxconn", SOMAXCONN);
 405         XLineMessage = options->getString("xlinemessage", options->getString("moronbanner", "You're banned!"));
 406         ServerDesc = server->getString("description", "Configure Me");
 407         Network = server->getString("network", "Network");
 408         NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240, 1024, 65534);
 409         DisabledDontExist = ConfValue("disabled")->getBool("fakenonexistant");
 410         UserStats = security->getString("userstats");
 411         CustomVersion = security->getString("customversion");
 412         HideSplits = security->getBool("hidesplits");
 413         HideBans = security->getBool("hidebans");
 414         HideServer = security->getString("hideserver", security->getString("hidewhois"));
 415         HideKillsServer = security->getString("hidekills");
 416         HideULineKills = security->getBool("hideulinekills");
 417         GenericOper = security->getBool("genericoper");
 418         SyntaxHints = options->getBool("syntaxhints");
 419         FullHostInTopic = options->getBool("hostintopic");
 420         MaxTargets = security->getUInt("maxtargets", 20, 1, 31);
 421         DefaultModes = options->getString("defaultmodes", "not");
 422         PID = ConfValue("pid")->getString("file");
 423         MaxChans = ConfValue("channels")->getUInt("users", 20);
 424         OperMaxChans = ConfValue("channels")->getUInt("opers", 0);
 425         c_ipv4_range = ConfValue("cidr")->getUInt("ipv4clone", 32, 1, 32);
 426         c_ipv6_range = ConfValue("cidr")->getUInt("ipv6clone", 128, 1, 128);
 427         Limits = ServerLimits(ConfValue("limits"));
 428         Paths = ServerPaths(ConfValue("path"));
 429         NoSnoticeStack = options->getBool("nosnoticestack", false);
 430
 431         std::string defbind = options->getString("defaultbind");
 432         if (stdalgo::string::equalsci(defbind, "ipv4"))
 433         {
 434                 WildcardIPv6 = false;
 435         }
 436         else if (stdalgo::string::equalsci(defbind, "ipv6"))
 437         {
 438                 WildcardIPv6 = true;
 439         }
 440         else
 441         {
 442                 WildcardIPv6 = true;
 443                 int socktest = socket(AF_INET6, SOCK_STREAM, 0);
 444                 if (socktest < 0)
 445                         WildcardIPv6 = false;
 446                 else
 447                         SocketEngine::Close(socktest);
 448         }
 449
 450         ServerInstance->XLines->ClearConfigLines();
 451         ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
 452         ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
 453         ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
 454         ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));
 455
 456         const std::string restrictbannedusers = options->getString("restrictbannedusers", "yes");
 457         if (stdalgo::string::equalsci(restrictbannedusers, "no"))
 458                 RestrictBannedUsers = ServerConfig::BUT_NORMAL;
 459         else if (stdalgo::string::equalsci(restrictbannedusers, "silent"))
 460                 RestrictBannedUsers = ServerConfig::BUT_RESTRICT_SILENT;
 461         else if (stdalgo::string::equalsci(restrictbannedusers, "yes"))
 462                 RestrictBannedUsers =  ServerConfig::BUT_RESTRICT_NOTIFY;
 463         else
 464                 throw CoreException(restrictbannedusers + " is an invalid <options:restrictbannedusers> value, at " + options->getTagLocation());
 465
 466         DisabledUModes.reset();
 467         std::string modes = ConfValue("disabled")->getString("usermodes");
 468         for (std::string::const_iterator p = modes.begin(); p != modes.end(); ++p)
 469         {
 470                 // Complain when the character is not a valid mode character.
 471                 if (!ModeParser::IsModeChar(*p))
 472                         throw CoreException("Invalid usermode " + std::string(1, *p) + " was found.");
 473                 DisabledUModes.set(*p - 'A');
 474         }
 475
 476         DisabledCModes.reset();
 477         modes = ConfValue("disabled")->getString("chanmodes");
 478         for (std::string::const_iterator p = modes.begin(); p != modes.end(); ++p)
 479         {
 480                 if (!ModeParser::IsModeChar(*p))
 481                         throw CoreException("Invalid chanmode " + std::string(1, *p) + " was found.");
 482                 DisabledCModes.set(*p - 'A');
 483         }
 484 }
 485
 486 // WARNING: it is not safe to use most of the codebase in this function, as it
 487 // will run in the config reader thread
 488 void ServerConfig::Read()
 489 {
 490         /* Load and parse the config file, if there are any errors then explode */
 491
 492         ParseStack stack(this);
 493         try
 494         {
 495                 valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
 496         }
 497         catch (CoreException& err)
 498         {
 499                 valid = false;
 500                 errstr << err.GetReason() << std::endl;
 501         }
 502 }
 503
 504 void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
 505 {
 506         valid = true;
 507         if (old)
 508         {
 509                 /*
 510                  * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
 511                  */
 512                 this->CaseMapping = old->CaseMapping;
 513                 this->ServerName = old->ServerName;
 514                 this->sid = old->sid;
 515                 this->cmdline = old->cmdline;
 516         }
 517
 518         /* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
 519         try
 520         {
 521                 for (unsigned long index = 0; index * sizeof(DeprecatedConfig) < sizeof(ChangedConfig); index++)
 522                 {
 523                         std::string value;
 524                         ConfigTagList tags = ConfTags(ChangedConfig[index].tag);
 525                         for(ConfigIter i = tags.first; i != tags.second; ++i)
 526                         {
 527                                 if (i->second->readString(ChangedConfig[index].key, value, true)
 528                                         && (ChangedConfig[index].value.empty() || value == ChangedConfig[index].value))
 529                                 {
 530                                         errstr << "Your configuration contains a deprecated value: <"  << ChangedConfig[index].tag;
 531                                         if (ChangedConfig[index].value.empty())
 532                                         {
 533                                                 errstr << ':' << ChangedConfig[index].key;
 534                                         }
 535                                         else
 536                                         {
 537                                                 errstr << ' ' << ChangedConfig[index].key << "=\"" << ChangedConfig[index].value << "\"";
 538                                         }
 539                                         errstr << "> - " << ChangedConfig[index].reason << " (at " << i->second->getTagLocation() << ")" << std::endl;
 540                                 }
 541                         }
 542                 }
 543
 544                 Fill();
 545
 546                 // Handle special items
 547                 CrossCheckOperClassType();
 548                 CrossCheckConnectBlocks(old);
 549         }
 550         catch (CoreException &ce)
 551         {
 552                 errstr << ce.GetReason() << std::endl;
 553         }
 554
 555         // Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
 556         valid = errstr.str().empty();
 557
 558         // write once here, to try it out and make sure its ok
 559         if (valid)
 560                 ServerInstance->WritePID(this->PID, !old);
 561
 562         ConfigTagList binds = ConfTags("bind");
 563         if (binds.first == binds.second)
 564                  errstr << "Possible configuration error: you have not defined any <bind> blocks." << std::endl
 565                          << "You will need to do this if you want clients to be able to connect!" << std::endl;
 566
 567         if (old && valid)
 568         {
 569                 // On first run, ports are bound later on
 570                 FailedPortList pl;
 571                 ServerInstance->BindPorts(pl);
 572                 if (pl.size())
 573                 {
 574                         errstr << "Not all your client ports could be bound." << std::endl
 575                                 << "The following port(s) failed to bind:" << std::endl;
 576
 577                         int j = 1;
 578                         for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 579                         {
 580                                 errstr << j << ".\tAddress: " << i->first.str() << "\tReason: " << strerror(i->second) << std::endl;
 581                         }
 582                 }
 583         }
 584
 585         User* user = useruid.empty() ? NULL : ServerInstance->FindNick(useruid);
 586
 587         if (!valid)
 588         {
 589                 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "There were errors in your configuration file:");
 590                 Classes.clear();
 591         }
 592
 593         while (errstr.good())
 594         {
 595                 std::string line;
 596                 getline(errstr, line, '\n');
 597                 if (line.empty())
 598                         continue;
 599                 // On startup, print out to console (still attached at this point)
 600                 if (!old)
 601                         std::cout << line << std::endl;
 602                 // If a user is rehashing, tell them directly
 603                 if (user)
 604                         user->WriteRemoteNotice(InspIRCd::Format("*** %s", line.c_str()));
 605                 // Also tell opers
 606                 ServerInstance->SNO->WriteGlobalSno('a', line);
 607         }
 608
 609         errstr.clear();
 610         errstr.str(std::string());
 611
 612         // Re-parse our MOTD and RULES files for colors -- Justasic
 613         for (ClassVector::const_iterator it = this->Classes.begin(), it_end = this->Classes.end(); it != it_end; ++it)
 614         {
 615                 ConfigTag *tag = (*it)->config;
 616
 617                 ConfigFileCache::iterator file = this->Files.find(tag->getString("motd", "motd"));
 618                 if (file != this->Files.end())
 619                         InspIRCd::ProcessColors(file->second);
 620         }
 621
 622         /* No old configuration -> initial boot, nothing more to do here */
 623         if (!old)
 624         {
 625                 if (!valid)
 626                 {
 627                         ServerInstance->Exit(EXIT_STATUS_CONFIG);
 628                 }
 629
 630                 return;
 631         }
 632
 633
 634         // If there were errors processing configuration, don't touch modules.
 635         if (!valid)
 636                 return;
 637
 638         ApplyModules(user);
 639
 640         if (user)
 641                 user->WriteRemoteNotice("*** Successfully rehashed server.");
 642         ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
 643 }
 644
 645 void ServerConfig::ApplyModules(User* user)
 646 {
 647         std::vector<std::string> added_modules;
 648         ModuleManager::ModuleMap removed_modules = ServerInstance->Modules->GetModules();
 649
 650         ConfigTagList tags = ConfTags("module");
 651         for(ConfigIter i = tags.first; i != tags.second; ++i)
 652         {
 653                 ConfigTag* tag = i->second;
 654                 std::string name;
 655                 if (tag->readString("name", name))
 656                 {
 657                         name = ModuleManager::ExpandModName(name);
 658                         // if this module is already loaded, the erase will succeed, so we need do nothing
 659                         // otherwise, we need to add the module (which will be done later)
 660                         if (removed_modules.erase(name) == 0)
 661                                 added_modules.push_back(name);
 662                 }
 663         }
 664
 665         for (ModuleManager::ModuleMap::iterator i = removed_modules.begin(); i != removed_modules.end(); ++i)
 666         {
 667                 const std::string& modname = i->first;
 668                 // Don't remove core_*.so, just remove m_*.so
 669                 if (InspIRCd::Match(modname, "core_*.so", ascii_case_insensitive_map))
 670                         continue;
 671                 if (ServerInstance->Modules->Unload(i->second))
 672                 {
 673                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s", modname.c_str());
 674
 675                         if (user)
 676                                 user->WriteNumeric(RPL_UNLOADEDMODULE, modname, InspIRCd::Format("Module %s successfully unloaded.", modname.c_str()));
 677                         else
 678                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully unloaded.", modname.c_str());
 679                 }
 680                 else
 681                 {
 682                         if (user)
 683                                 user->WriteNumeric(ERR_CANTUNLOADMODULE, modname, InspIRCd::Format("Failed to unload module %s: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str()));
 684                         else
 685                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload module %s: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str());
 686                 }
 687         }
 688
 689         for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 690         {
 691                 // Skip modules which are already loaded.
 692                 if (ServerInstance->Modules->Find(*adding))
 693                         continue;
 694
 695                 if (ServerInstance->Modules->Load(*adding))
 696                 {
 697                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
 698                         if (user)
 699                                 user->WriteNumeric(RPL_LOADEDMODULE, *adding, InspIRCd::Format("Module %s successfully loaded.", adding->c_str()));
 700                         else
 701                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully loaded.", adding->c_str());
 702                 }
 703                 else
 704                 {
 705                         if (user)
 706                                 user->WriteNumeric(ERR_CANTLOADMODULE, *adding, InspIRCd::Format("Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str()));
 707                         else
 708                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
 709                 }
 710         }
 711 }
 712
 713 ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 714 {
 715         ConfigTagList found = config_data.equal_range(tag);
 716         if (found.first == found.second)
 717                 return EmptyTag;
 718         ConfigTag* rv = found.first->second;
 719         found.first++;
 720         if (found.first != found.second)
 721                 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
 722                         "(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
 723         return rv;
 724 }
 725
 726 ConfigTagList ServerConfig::ConfTags(const std::string& tag)
 727 {
 728         return config_data.equal_range(tag);
 729 }
 730
 731 std::string ServerConfig::Escape(const std::string& str, bool xml)
 732 {
 733         std::string escaped;
 734         for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
 735         {
 736                 switch (*it)
 737                 {
 738                         case '"':
 739                                 escaped += xml ? "&quot;" : "\"";
 740                                 break;
 741                         case '&':
 742                                 escaped += xml ? "&amp;" : "&";
 743                                 break;
 744                         case '\\':
 745                                 escaped += xml ? "\\" : "\\\\";
 746                                 break;
 747                         default:
 748                                 escaped += *it;
 749                                 break;
 750                 }
 751         }
 752         return escaped;
 753 }
 754
 755 void ConfigReaderThread::Run()
 756 {
 757         Config->Read();
 758         done = true;
 759 }
 760
 761 void ConfigReaderThread::Finish()
 762 {
 763         ServerConfig* old = ServerInstance->Config;
 764         ServerInstance->Logs->Log("CONFIG", LOG_DEBUG, "Switching to new configuration...");
 765         ServerInstance->Config = this->Config;
 766         Config->Apply(old, TheUserUID);
 767
 768         if (Config->valid)
 769         {
 770                 /*
 771                  * Apply the changed configuration from the rehash.
 772                  *
 773                  * XXX: The order of these is IMPORTANT, do not reorder them without testing
 774                  * thoroughly!!!
 775                  */
 776                 ServerInstance->Users.RehashCloneCounts();
 777                 ServerInstance->XLines->CheckELines();
 778                 ServerInstance->XLines->ApplyLines();
 779                 Config->ApplyDisabledCommands();
 780                 User* user = ServerInstance->FindNick(TheUserUID);
 781
 782                 ConfigStatus status(user);
 783                 const ModuleManager::ModuleMap& mods = ServerInstance->Modules->GetModules();
 784                 for (ModuleManager::ModuleMap::const_iterator i = mods.begin(); i != mods.end(); ++i)
 785                 {
 786                         try
 787                         {
 788                                 ServerInstance->Logs->Log("MODULE", LOG_DEBUG, "Rehashing " + i->first);
 789                                 i->second->ReadConfig(status);
 790                         }
 791                         catch (CoreException& modex)
 792                         {
 793                                 ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Exception caught: " + modex.GetReason());
 794                                 if (user)
 795                                         user->WriteNotice(i->first + ": " + modex.GetReason());
 796                         }
 797                 }
 798
 799                 // The description of this server may have changed - update it for WHOIS etc.
 800                 ServerInstance->FakeClient->server->description = Config->ServerDesc;
 801
 802                 ServerInstance->ISupport.Build();
 803
 804                 ServerInstance->Logs->CloseLogs();
 805                 ServerInstance->Logs->OpenFileLogs();
 806
 807                 if (Config->RawLog && !old->RawLog)
 808                         ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 809
 810                 Config = old;
 811         }
 812         else
 813         {
 814                 // whoops, abort!
 815                 ServerInstance->Config = old;
 816         }
 817 }