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 <fstream>
  27 #include "xline.h"
  28 #include "exitcodes.h"
  29 #include "configparser.h"
  30 #include <iostream>
  31 #ifdef _WIN32
  32 #include <Iphlpapi.h>
  33 #pragma comment(lib, "Iphlpapi.lib")
  34 #endif
  35
  36 ServerConfig::ServerConfig()
  37 {
  38         RawLog = NoUserDns = HideBans = HideSplits = UndernetMsgPrefix = false;
  39         WildcardIPv6 = CycleHosts = InvBypassModes = true;
  40         dns_timeout = 5;
  41         MaxTargets = 20;
  42         NetBufferSize = 10240;
  43         SoftLimit = ServerInstance->SE->GetMaxFds();
  44         MaxConn = SOMAXCONN;
  45         MaxChans = 20;
  46         OperMaxChans = 30;
  47         c_ipv4_range = 32;
  48         c_ipv6_range = 128;
  49 }
  50
  51 void ServerConfig::Update005()
  52 {
  53         std::stringstream out(data005);
  54         std::vector<std::string> data;
  55         std::string token;
  56         while (out >> token)
  57                 data.push_back(token);
  58         sort(data.begin(), data.end());
  59
  60         std::string line5;
  61         isupport.clear();
  62         for(unsigned int i=0; i < data.size(); i++)
  63         {
  64                 token = data[i];
  65                 line5 = line5 + token + " ";
  66                 if (i % 13 == 12)
  67                 {
  68                         line5.append(":are supported by this server");
  69                         isupport.push_back(line5);
  70                         line5.clear();
  71                 }
  72         }
  73         if (!line5.empty())
  74         {
  75                 line5.append(":are supported by this server");
  76                 isupport.push_back(line5);
  77         }
  78 }
  79
  80 void ServerConfig::Send005(User* user)
  81 {
  82         for (std::vector<std::string>::iterator line = ServerInstance->Config->isupport.begin(); line != ServerInstance->Config->isupport.end(); line++)
  83                 user->WriteNumeric(RPL_ISUPPORT, "%s %s", user->nick.c_str(), line->c_str());
  84 }
  85
  86 template<typename T, typename V>
  87 static void range(T& value, V min, V max, V def, const char* msg)
  88 {
  89         if (value >= (T)min && value <= (T)max)
  90                 return;
  91         ServerInstance->Logs->Log("CONFIG", DEFAULT,
  92                 "WARNING: %s value of %ld is not between %ld and %ld; set to %ld.",
  93                 msg, (long)value, (long)min, (long)max, (long)def);
  94         value = def;
  95 }
  96
  97
  98 static void ValidIP(const std::string& ip, const std::string& key)
  99 {
 100         irc::sockets::sockaddrs dummy;
 101         if (!irc::sockets::aptosa(ip, 0, dummy))
 102                 throw CoreException("The value of "+key+" is not an IP address");
 103 }
 104
 105 static void ValidHost(const std::string& p, const std::string& msg)
 106 {
 107         int num_dots = 0;
 108         if (p.empty() || p[0] == '.')
 109                 throw CoreException("The value of "+msg+" is not a valid hostname");
 110         for (unsigned int i=0;i < p.length();i++)
 111         {
 112                 switch (p[i])
 113                 {
 114                         case ' ':
 115                                 throw CoreException("The value of "+msg+" is not a valid hostname");
 116                         case '.':
 117                                 num_dots++;
 118                         break;
 119                 }
 120         }
 121         if (num_dots == 0)
 122                 throw CoreException("The value of "+msg+" is not a valid hostname");
 123 }
 124
 125 bool ServerConfig::ApplyDisabledCommands(const std::string& data)
 126 {
 127         std::stringstream dcmds(data);
 128         std::string thiscmd;
 129
 130         /* Enable everything first */
 131         for (Commandtable::iterator x = ServerInstance->Parser->cmdlist.begin(); x != ServerInstance->Parser->cmdlist.end(); x++)
 132                 x->second->Disable(false);
 133
 134         /* Now disable all the ones which the user wants disabled */
 135         while (dcmds >> thiscmd)
 136         {
 137                 Commandtable::iterator cm = ServerInstance->Parser->cmdlist.find(thiscmd);
 138                 if (cm != ServerInstance->Parser->cmdlist.end())
 139                 {
 140                         cm->second->Disable(true);
 141                 }
 142         }
 143         return true;
 144 }
 145
 146 static void FindDNS(std::string& server)
 147 {
 148         if (!server.empty())
 149                 return;
 150 #ifdef _WIN32
 151         // attempt to look up their nameserver from the system
 152         ServerInstance->Logs->Log("CONFIG",DEFAULT,"WARNING: <dns:server> not defined, attempting to find a working server in the system settings...");
 153
 154         PFIXED_INFO pFixedInfo;
 155         DWORD dwBufferSize = sizeof(FIXED_INFO);
 156         pFixedInfo = (PFIXED_INFO) HeapAlloc(GetProcessHeap(), 0, sizeof(FIXED_INFO));
 157
 158         if(pFixedInfo)
 159         {
 160                 if (GetNetworkParams(pFixedInfo, &dwBufferSize) == ERROR_BUFFER_OVERFLOW) {
 161                         HeapFree(GetProcessHeap(), 0, pFixedInfo);
 162                         pFixedInfo = (PFIXED_INFO) HeapAlloc(GetProcessHeap(), 0, dwBufferSize);
 163                 }
 164
 165                 if(pFixedInfo) {
 166                         if (GetNetworkParams(pFixedInfo, &dwBufferSize) == NO_ERROR)
 167                                 server = pFixedInfo->DnsServerList.IpAddress.String;
 168
 169                         HeapFree(GetProcessHeap(), 0, pFixedInfo);
 170                 }
 171
 172                 if(!server.empty())
 173                 {
 174                         ServerInstance->Logs->Log("CONFIG",DEFAULT,"<dns:server> set to '%s' as first active resolver in the system settings.", server.c_str());
 175                         return;
 176                 }
 177         }
 178
 179         ServerInstance->Logs->Log("CONFIG",DEFAULT,"No viable nameserver found! Defaulting to nameserver '127.0.0.1'!");
 180 #else
 181         // attempt to look up their nameserver from /etc/resolv.conf
 182         ServerInstance->Logs->Log("CONFIG",DEFAULT,"WARNING: <dns:server> not defined, attempting to find working server in /etc/resolv.conf...");
 183
 184         std::ifstream resolv("/etc/resolv.conf");
 185
 186         while (resolv >> server)
 187         {
 188                 if (server == "nameserver")
 189                 {
 190                         resolv >> server;
 191                         if (server.find_first_not_of("0123456789.") == std::string::npos)
 192                         {
 193                                 ServerInstance->Logs->Log("CONFIG",DEFAULT,"<dns:server> set to '%s' as first resolver in /etc/resolv.conf.",server.c_str());
 194                                 return;
 195                         }
 196                 }
 197         }
 198
 199         ServerInstance->Logs->Log("CONFIG",DEFAULT,"/etc/resolv.conf contains no viable nameserver entries! Defaulting to nameserver '127.0.0.1'!");
 200 #endif
 201         server = "127.0.0.1";
 202 }
 203
 204 static void ReadXLine(ServerConfig* conf, const std::string& tag, const std::string& key, XLineFactory* make)
 205 {
 206         ConfigTagList tags = conf->ConfTags(tag);
 207         for(ConfigIter i = tags.first; i != tags.second; ++i)
 208         {
 209                 ConfigTag* ctag = i->second;
 210                 std::string mask;
 211                 if (!ctag->readString(key, mask))
 212                         throw CoreException("<"+tag+":"+key+"> missing at " + ctag->getTagLocation());
 213                 std::string reason = ctag->getString("reason", "<Config>");
 214                 XLine* xl = make->Generate(ServerInstance->Time(), 0, "<Config>", reason, mask);
 215                 if (!ServerInstance->XLines->AddLine(xl, NULL))
 216                         delete xl;
 217         }
 218 }
 219
 220 typedef std::map<std::string, ConfigTag*> LocalIndex;
 221 void ServerConfig::CrossCheckOperClassType()
 222 {
 223         LocalIndex operclass;
 224         ConfigTagList tags = ConfTags("class");
 225         for(ConfigIter i = tags.first; i != tags.second; ++i)
 226         {
 227                 ConfigTag* tag = i->second;
 228                 std::string name = tag->getString("name");
 229                 if (name.empty())
 230                         throw CoreException("<class:name> missing from tag at " + tag->getTagLocation());
 231                 if (operclass.find(name) != operclass.end())
 232                         throw CoreException("Duplicate class block with name " + name + " at " + tag->getTagLocation());
 233                 operclass[name] = tag;
 234         }
 235         tags = ConfTags("type");
 236         for(ConfigIter i = tags.first; i != tags.second; ++i)
 237         {
 238                 ConfigTag* tag = i->second;
 239                 std::string name = tag->getString("name");
 240                 if (name.empty())
 241                         throw CoreException("<type:name> is missing from tag at " + tag->getTagLocation());
 242                 if (!ServerInstance->IsNick(name, Limits.NickMax))
 243                         throw CoreException("<type:name> is invalid (value '" + name + "')");
 244                 if (oper_blocks.find(" " + name) != oper_blocks.end())
 245                         throw CoreException("Duplicate type block with name " + name + " at " + tag->getTagLocation());
 246
 247                 OperInfo* ifo = new OperInfo;
 248                 oper_blocks[" " + name] = ifo;
 249                 ifo->name = name;
 250                 ifo->type_block = tag;
 251
 252                 std::string classname;
 253                 irc::spacesepstream str(tag->getString("classes"));
 254                 while (str.GetToken(classname))
 255                 {
 256                         LocalIndex::iterator cls = operclass.find(classname);
 257                         if (cls == operclass.end())
 258                                 throw CoreException("Oper type " + name + " has missing class " + classname);
 259                         ifo->class_blocks.push_back(cls->second);
 260                 }
 261         }
 262
 263         tags = ConfTags("oper");
 264         for(ConfigIter i = tags.first; i != tags.second; ++i)
 265         {
 266                 ConfigTag* tag = i->second;
 267
 268                 std::string name = tag->getString("name");
 269                 if (name.empty())
 270                         throw CoreException("<oper:name> missing from tag at " + tag->getTagLocation());
 271
 272                 std::string type = tag->getString("type");
 273                 OperIndex::iterator tblk = oper_blocks.find(" " + type);
 274                 if (tblk == oper_blocks.end())
 275                         throw CoreException("Oper block " + name + " has missing type " + type);
 276                 if (oper_blocks.find(name) != oper_blocks.end())
 277                         throw CoreException("Duplicate oper block with name " + name + " at " + tag->getTagLocation());
 278
 279                 OperInfo* ifo = new OperInfo;
 280                 ifo->name = type;
 281                 ifo->oper_block = tag;
 282                 ifo->type_block = tblk->second->type_block;
 283                 ifo->class_blocks.assign(tblk->second->class_blocks.begin(), tblk->second->class_blocks.end());
 284                 oper_blocks[name] = ifo;
 285         }
 286 }
 287
 288 void ServerConfig::CrossCheckConnectBlocks(ServerConfig* current)
 289 {
 290         typedef std::map<std::string, ConnectClass*> ClassMap;
 291         ClassMap oldBlocksByMask;
 292         if (current)
 293         {
 294                 for(ClassVector::iterator i = current->Classes.begin(); i != current->Classes.end(); ++i)
 295                 {
 296                         ConnectClass* c = *i;
 297                         if (c->name.substr(0, 8) != "unnamed-")
 298                         {
 299                                 oldBlocksByMask["n" + c->name] = c;
 300                         }
 301                         else if (c->type == CC_ALLOW || c->type == CC_DENY)
 302                         {
 303                                 std::string typeMask = (c->type == CC_ALLOW) ? "a" : "d";
 304                                 typeMask += c->host;
 305                                 oldBlocksByMask[typeMask] = c;
 306                         }
 307                 }
 308         }
 309
 310         int blk_count = config_data.count("connect");
 311         if (blk_count == 0)
 312         {
 313                 // No connect blocks found; make a trivial default block
 314                 std::vector<KeyVal>* items;
 315                 ConfigTag* tag = ConfigTag::create("connect", "<auto>", 0, items);
 316                 items->push_back(std::make_pair("allow", "*"));
 317                 config_data.insert(std::make_pair("connect", tag));
 318                 blk_count = 1;
 319         }
 320
 321         Classes.resize(blk_count);
 322         std::map<std::string, int> names;
 323
 324         bool try_again = true;
 325         for(int tries=0; try_again; tries++)
 326         {
 327                 try_again = false;
 328                 ConfigTagList tags = ConfTags("connect");
 329                 int i=0;
 330                 for(ConfigIter it = tags.first; it != tags.second; ++it, ++i)
 331                 {
 332                         ConfigTag* tag = it->second;
 333                         if (Classes[i])
 334                                 continue;
 335
 336                         ConnectClass* parent = NULL;
 337                         std::string parentName = tag->getString("parent");
 338                         if (!parentName.empty())
 339                         {
 340                                 std::map<std::string,int>::iterator parentIter = names.find(parentName);
 341                                 if (parentIter == names.end())
 342                                 {
 343                                         try_again = true;
 344                                         // couldn't find parent this time. If it's the last time, we'll never find it.
 345                                         if (tries >= blk_count)
 346                                                 throw CoreException("Could not find parent connect class \"" + parentName + "\" for connect block at " + tag->getTagLocation());
 347                                         continue;
 348                                 }
 349                                 parent = Classes[parentIter->second];
 350                         }
 351
 352                         std::string name = tag->getString("name");
 353                         std::string mask, typeMask;
 354                         char type;
 355
 356                         if (tag->readString("allow", mask, false))
 357                         {
 358                                 type = CC_ALLOW;
 359                                 typeMask = 'a' + mask;
 360                         }
 361                         else if (tag->readString("deny", mask, false))
 362                         {
 363                                 type = CC_DENY;
 364                                 typeMask = 'd' + mask;
 365                         }
 366                         else if (!name.empty())
 367                         {
 368                                 type = CC_NAMED;
 369                                 mask = name;
 370                                 typeMask = 'n' + mask;
 371                         }
 372                         else
 373                         {
 374                                 throw CoreException("Connect class must have allow, deny, or name specified at " + tag->getTagLocation());
 375                         }
 376
 377                         if (name.empty())
 378                         {
 379                                 name = "unnamed-" + ConvToStr(i);
 380                         }
 381                         else
 382                         {
 383                                 typeMask = 'n' + name;
 384                         }
 385
 386                         if (names.find(name) != names.end())
 387                                 throw CoreException("Two connect classes with name \"" + name + "\" defined!");
 388                         names[name] = i;
 389
 390                         ConnectClass* me = parent ?
 391                                 new ConnectClass(tag, type, mask, *parent) :
 392                                 new ConnectClass(tag, type, mask);
 393
 394                         me->name = name;
 395
 396                         me->registration_timeout = tag->getInt("timeout", me->registration_timeout);
 397                         me->pingtime = tag->getInt("pingfreq", me->pingtime);
 398                         std::string sendq;
 399                         if (tag->readString("sendq", sendq))
 400                         {
 401                                 // attempt to guess a good hard/soft sendq from a single value
 402                                 long value = atol(sendq.c_str());
 403                                 if (value > 16384)
 404                                         me->softsendqmax = value / 16;
 405                                 else
 406                                         me->softsendqmax = value;
 407                                 me->hardsendqmax = value * 8;
 408                         }
 409                         me->softsendqmax = tag->getInt("softsendq", me->softsendqmax);
 410                         me->hardsendqmax = tag->getInt("hardsendq", me->hardsendqmax);
 411                         me->recvqmax = tag->getInt("recvq", me->recvqmax);
 412                         me->penaltythreshold = tag->getInt("threshold", me->penaltythreshold);
 413                         me->commandrate = tag->getInt("commandrate", me->commandrate);
 414                         me->fakelag = tag->getBool("fakelag", me->fakelag);
 415                         me->maxlocal = tag->getInt("localmax", me->maxlocal);
 416                         me->maxglobal = tag->getInt("globalmax", me->maxglobal);
 417                         me->maxchans = tag->getInt("maxchans", me->maxchans);
 418                         me->maxconnwarn = tag->getBool("maxconnwarn", me->maxconnwarn);
 419                         me->limit = tag->getInt("limit", me->limit);
 420
 421                         ClassMap::iterator oldMask = oldBlocksByMask.find(typeMask);
 422                         if (oldMask != oldBlocksByMask.end())
 423                         {
 424                                 ConnectClass* old = oldMask->second;
 425                                 oldBlocksByMask.erase(oldMask);
 426                                 old->Update(me);
 427                                 delete me;
 428                                 me = old;
 429                         }
 430                         Classes[i] = me;
 431                 }
 432         }
 433 }
 434
 435 /** Represents a deprecated configuration tag.
 436  */
 437 struct DeprecatedConfig
 438 {
 439         /** Tag name. */
 440         std::string tag;
 441
 442         /** Attribute key. */
 443         std::string key;
 444
 445         /** Attribute value. */
 446         std::string value;
 447
 448         /** Reason for deprecation. */
 449         std::string reason;
 450 };
 451
 452 static const DeprecatedConfig ChangedConfig[] = {
 453         { "bind",   "transport",   "",                 "has been moved to <bind:ssl> as of 2.0" },
 454         { "die",    "value",       "",                 "you need to reread your config" },
 455         { "link",   "autoconnect", "",                 "2.0+ does not use this attribute - define <autoconnect> tags instead" },
 456         { "link",   "transport",   "",                 "has been moved to <link:ssl> as of 2.0" },
 457         { "module", "name",        "m_chanprotect.so", "has been replaced with m_customprefix as of 2.2" },
 458         { "module", "name",        "m_halfop.so",      "has been replaced with m_customprefix as of 2.2" },
 459 };
 460
 461 void ServerConfig::Fill()
 462 {
 463         ConfigTag* options = ConfValue("options");
 464         ConfigTag* security = ConfValue("security");
 465         if (sid.empty())
 466         {
 467                 ServerName = ConfValue("server")->getString("name");
 468                 sid = ConfValue("server")->getString("id");
 469                 ValidHost(ServerName, "<server:name>");
 470                 if (!sid.empty() && !InspIRCd::IsSID(sid))
 471                         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.");
 472         }
 473         else
 474         {
 475                 if (ServerName != ConfValue("server")->getString("name"))
 476                         throw CoreException("You must restart to change the server name or SID");
 477                 std::string nsid = ConfValue("server")->getString("id");
 478                 if (!nsid.empty() && nsid != sid)
 479                         throw CoreException("You must restart to change the server name or SID");
 480         }
 481         diepass = ConfValue("power")->getString("diepass");
 482         restartpass = ConfValue("power")->getString("restartpass");
 483         powerhash = ConfValue("power")->getString("hash");
 484         PrefixQuit = options->getString("prefixquit");
 485         SuffixQuit = options->getString("suffixquit");
 486         FixedQuit = options->getString("fixedquit");
 487         PrefixPart = options->getString("prefixpart");
 488         SuffixPart = options->getString("suffixpart");
 489         FixedPart = options->getString("fixedpart");
 490         SoftLimit = ConfValue("performance")->getInt("softlimit", ServerInstance->SE->GetMaxFds());
 491         MaxConn = ConfValue("performance")->getInt("somaxconn", SOMAXCONN);
 492         MoronBanner = options->getString("moronbanner", "You're banned!");
 493         ServerDesc = ConfValue("server")->getString("description", "Configure Me");
 494         Network = ConfValue("server")->getString("network", "Network");
 495         AdminName = ConfValue("admin")->getString("name", "");
 496         AdminEmail = ConfValue("admin")->getString("email", "null@example.com");
 497         AdminNick = ConfValue("admin")->getString("nick", "admin");
 498         ModPath = ConfValue("path")->getString("moduledir", MOD_PATH);
 499         NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240);
 500         dns_timeout = ConfValue("dns")->getInt("timeout", 5);
 501         DisabledCommands = ConfValue("disabled")->getString("commands", "");
 502         DisabledDontExist = ConfValue("disabled")->getBool("fakenonexistant");
 503         UserStats = security->getString("userstats");
 504         CustomVersion = security->getString("customversion", Network + " IRCd");
 505         HideSplits = security->getBool("hidesplits");
 506         HideBans = security->getBool("hidebans");
 507         HideWhoisServer = security->getString("hidewhois");
 508         HideKillsServer = security->getString("hidekills");
 509         RestrictBannedUsers = security->getBool("restrictbannedusers", true);
 510         GenericOper = security->getBool("genericoper");
 511         NoUserDns = ConfValue("performance")->getBool("nouserdns");
 512         SyntaxHints = options->getBool("syntaxhints");
 513         CycleHosts = options->getBool("cyclehosts");
 514         CycleHostsFromUser = options->getBool("cyclehostsfromuser");
 515         UndernetMsgPrefix = options->getBool("ircumsgprefix");
 516         FullHostInTopic = options->getBool("hostintopic");
 517         MaxTargets = security->getInt("maxtargets", 20);
 518         DefaultModes = options->getString("defaultmodes", "nt");
 519         PID = ConfValue("pid")->getString("file");
 520         MaxChans = ConfValue("channels")->getInt("users", 20);
 521         OperMaxChans = ConfValue("channels")->getInt("opers", 60);
 522         c_ipv4_range = ConfValue("cidr")->getInt("ipv4clone", 32);
 523         c_ipv6_range = ConfValue("cidr")->getInt("ipv6clone", 128);
 524         Limits.NickMax = ConfValue("limits")->getInt("maxnick", 32);
 525         Limits.ChanMax = ConfValue("limits")->getInt("maxchan", 64);
 526         Limits.MaxModes = ConfValue("limits")->getInt("maxmodes", 20);
 527         Limits.IdentMax = ConfValue("limits")->getInt("maxident", 11);
 528         Limits.MaxQuit = ConfValue("limits")->getInt("maxquit", 255);
 529         Limits.MaxTopic = ConfValue("limits")->getInt("maxtopic", 307);
 530         Limits.MaxKick = ConfValue("limits")->getInt("maxkick", 255);
 531         Limits.MaxGecos = ConfValue("limits")->getInt("maxgecos", 128);
 532         Limits.MaxAway = ConfValue("limits")->getInt("maxaway", 200);
 533         InvBypassModes = options->getBool("invitebypassmodes", true);
 534         NoSnoticeStack = options->getBool("nosnoticestack", false);
 535
 536         range(SoftLimit, 10, ServerInstance->SE->GetMaxFds(), ServerInstance->SE->GetMaxFds(), "<performance:softlimit>");
 537         range(MaxConn, 0, SOMAXCONN, SOMAXCONN, "<performance:somaxconn>");
 538         range(MaxTargets, 1, 31, 20, "<security:maxtargets>");
 539         range(NetBufferSize, 1024, 65534, 10240, "<performance:netbuffersize>");
 540
 541         ValidIP(DNSServer, "<dns:server>");
 542
 543         std::string defbind = options->getString("defaultbind");
 544         if (assign(defbind) == "ipv4")
 545         {
 546                 WildcardIPv6 = false;
 547         }
 548         else if (assign(defbind) == "ipv6")
 549         {
 550                 WildcardIPv6 = true;
 551         }
 552         else
 553         {
 554                 WildcardIPv6 = true;
 555                 int socktest = socket(AF_INET6, SOCK_STREAM, 0);
 556                 if (socktest < 0)
 557                         WildcardIPv6 = false;
 558                 else
 559                         ServerInstance->SE->Close(socktest);
 560         }
 561         ConfigTagList tags = ConfTags("uline");
 562         for(ConfigIter i = tags.first; i != tags.second; ++i)
 563         {
 564                 ConfigTag* tag = i->second;
 565                 std::string server;
 566                 if (!tag->readString("server", server))
 567                         throw CoreException("<uline> tag missing server at " + tag->getTagLocation());
 568                 ulines[assign(server)] = tag->getBool("silent");
 569         }
 570
 571         tags = ConfTags("banlist");
 572         for(ConfigIter i = tags.first; i != tags.second; ++i)
 573         {
 574                 ConfigTag* tag = i->second;
 575                 std::string chan;
 576                 if (!tag->readString("chan", chan))
 577                         throw CoreException("<banlist> tag missing chan at " + tag->getTagLocation());
 578                 maxbans[chan] = tag->getInt("limit");
 579         }
 580
 581         ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
 582         ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
 583         ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
 584         ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));
 585
 586         memset(DisabledUModes, 0, sizeof(DisabledUModes));
 587         std::string modes = ConfValue("disabled")->getString("usermodes");
 588         for (std::string::const_iterator p = modes.begin(); p != modes.end(); ++p)
 589         {
 590                 // Complain when the character is not a-z or A-Z
 591                 if ((*p < 'A') || (*p > 'z') || ((*p < 'a') && (*p > 'Z')))
 592                         throw CoreException("Invalid usermode " + std::string(1, *p) + " was found.");
 593                 DisabledUModes[*p - 'A'] = 1;
 594         }
 595
 596         memset(DisabledCModes, 0, sizeof(DisabledCModes));
 597         modes = ConfValue("disabled")->getString("chanmodes");
 598         for (std::string::const_iterator p = modes.begin(); p != modes.end(); ++p)
 599         {
 600                 if ((*p < 'A') || (*p > 'z') || ((*p < 'a') && (*p > 'Z')))
 601                         throw CoreException("Invalid chanmode " + std::string(1, *p) + " was found.");
 602                 DisabledCModes[*p - 'A'] = 1;
 603         }
 604
 605         memset(HideModeLists, 0, sizeof(HideModeLists));
 606         modes = ConfValue("security")->getString("hidemodes");
 607         for (std::string::const_iterator p = modes.begin(); p != modes.end(); ++p)
 608                 HideModeLists[(unsigned char) *p] = true;
 609
 610         std::string v = security->getString("announceinvites");
 611
 612         if (v == "ops")
 613                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_OPS;
 614         else if (v == "all")
 615                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_ALL;
 616         else if (v == "dynamic")
 617                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_DYNAMIC;
 618         else
 619                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_NONE;
 620
 621         v = security->getString("operspywhois");
 622         if (v == "splitmsg")
 623                 OperSpyWhois = SPYWHOIS_SPLITMSG;
 624         else if (v == "on" || v == "yes")
 625                 OperSpyWhois = SPYWHOIS_SINGLEMSG;
 626         else
 627                 OperSpyWhois = SPYWHOIS_NONE;
 628 }
 629
 630 // WARNING: it is not safe to use most of the codebase in this function, as it
 631 // will run in the config reader thread
 632 void ServerConfig::Read()
 633 {
 634         /* Load and parse the config file, if there are any errors then explode */
 635
 636         ParseStack stack(this);
 637         try
 638         {
 639                 valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
 640         }
 641         catch (CoreException& err)
 642         {
 643                 valid = false;
 644                 errstr << err.GetReason();
 645         }
 646         if (valid)
 647         {
 648                 DNSServer = ConfValue("dns")->getString("server");
 649                 FindDNS(DNSServer);
 650         }
 651 }
 652
 653 void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
 654 {
 655         valid = true;
 656         if (old)
 657         {
 658                 /*
 659                  * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
 660                  */
 661                 this->ServerName = old->ServerName;
 662                 this->sid = old->sid;
 663                 this->cmdline = old->cmdline;
 664         }
 665
 666         /* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
 667         try
 668         {
 669                 for (int index = 0; index * sizeof(DeprecatedConfig) < sizeof(ChangedConfig); index++)
 670                 {
 671                         std::string value;
 672                         ConfigTagList tags = ConfTags(ChangedConfig[index].tag);
 673                         for(ConfigIter i = tags.first; i != tags.second; ++i)
 674                         {
 675                                 if (i->second->readString(ChangedConfig[index].key, value, true)
 676                                         && (ChangedConfig[index].value.empty() || value == ChangedConfig[index].value))
 677                                 {
 678                                         errstr << "Your configuration contains a deprecated value: <"  << ChangedConfig[index].tag;
 679                                         if (ChangedConfig[index].value.empty())
 680                                         {
 681                                                 errstr << ':' << ChangedConfig[index].key;
 682                                         }
 683                                         else
 684                                         {
 685                                                 errstr << ' ' << ChangedConfig[index].key << "=\"" << ChangedConfig[index].value << "\"";
 686                                         }
 687                                         errstr << "> - " << ChangedConfig[index].reason << " (at " << i->second->getTagLocation() << ")\n";
 688                                 }
 689                         }
 690                 }
 691
 692                 Fill();
 693
 694                 // Handle special items
 695                 CrossCheckOperClassType();
 696                 CrossCheckConnectBlocks(old);
 697         }
 698         catch (CoreException &ce)
 699         {
 700                 errstr << ce.GetReason();
 701         }
 702
 703         // Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
 704         valid = errstr.str().empty();
 705
 706         // write once here, to try it out and make sure its ok
 707         if (valid)
 708                 ServerInstance->WritePID(this->PID);
 709
 710         if (old)
 711         {
 712                 // On first run, ports are bound later on
 713                 FailedPortList pl;
 714                 ServerInstance->BindPorts(pl);
 715                 if (pl.size())
 716                 {
 717                         errstr << "Not all your client ports could be bound.\nThe following port(s) failed to bind:\n";
 718
 719                         int j = 1;
 720                         for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 721                         {
 722                                 char buf[MAXBUF];
 723                                 snprintf(buf, MAXBUF, "%d.   Address: %s   Reason: %s\n", j, i->first.empty() ? "<all>" : i->first.c_str(), i->second.c_str());
 724                                 errstr << buf;
 725                         }
 726                 }
 727         }
 728
 729         User* user = useruid.empty() ? NULL : ServerInstance->FindNick(useruid);
 730
 731         if (!valid)
 732                 ServerInstance->Logs->Log("CONFIG",DEFAULT, "There were errors in your configuration file:");
 733
 734         while (errstr.good())
 735         {
 736                 std::string line;
 737                 getline(errstr, line, '\n');
 738                 if (line.empty())
 739                         continue;
 740                 // On startup, print out to console (still attached at this point)
 741                 if (!old)
 742                         std::cout << line << std::endl;
 743                 // If a user is rehashing, tell them directly
 744                 if (user)
 745                         user->SendText(":%s NOTICE %s :*** %s", ServerInstance->Config->ServerName.c_str(), user->nick.c_str(), line.c_str());
 746                 // Also tell opers
 747                 ServerInstance->SNO->WriteGlobalSno('a', line);
 748         }
 749
 750         errstr.clear();
 751         errstr.str(std::string());
 752
 753         // Re-parse our MOTD and RULES files for colors -- Justasic
 754         for (ClassVector::const_iterator it = this->Classes.begin(), it_end = this->Classes.end(); it != it_end; ++it)
 755         {
 756                 ConfigTag *tag = (*it)->config;
 757                 // Make sure our connection class allows motd colors
 758                 if(!tag->getBool("allowmotdcolors"))
 759                       continue;
 760
 761                 ConfigFileCache::iterator file = this->Files.find(tag->getString("motd", "motd"));
 762                 if (file != this->Files.end())
 763                       InspIRCd::ProcessColors(file->second);
 764
 765                 file = this->Files.find(tag->getString("rules", "rules"));
 766                 if (file != this->Files.end())
 767                       InspIRCd::ProcessColors(file->second);
 768         }
 769
 770         /* No old configuration -> initial boot, nothing more to do here */
 771         if (!old)
 772         {
 773                 if (!valid)
 774                 {
 775                         ServerInstance->Exit(EXIT_STATUS_CONFIG);
 776                 }
 777
 778                 return;
 779         }
 780
 781
 782         // If there were errors processing configuration, don't touch modules.
 783         if (!valid)
 784                 return;
 785
 786         ApplyModules(user);
 787
 788         if (user)
 789                 user->SendText(":%s NOTICE %s :*** Successfully rehashed server.",
 790                         ServerInstance->Config->ServerName.c_str(), user->nick.c_str());
 791         ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
 792 }
 793
 794 void ServerConfig::ApplyModules(User* user)
 795 {
 796         const std::vector<std::string> v = ServerInstance->Modules->GetAllModuleNames(0);
 797         std::vector<std::string> added_modules;
 798         std::set<std::string> removed_modules(v.begin(), v.end());
 799
 800         ConfigTagList tags = ConfTags("module");
 801         for(ConfigIter i = tags.first; i != tags.second; ++i)
 802         {
 803                 ConfigTag* tag = i->second;
 804                 std::string name;
 805                 if (tag->readString("name", name))
 806                 {
 807                         // if this module is already loaded, the erase will succeed, so we need do nothing
 808                         // otherwise, we need to add the module (which will be done later)
 809                         if (removed_modules.erase(name) == 0)
 810                                 added_modules.push_back(name);
 811                 }
 812         }
 813
 814         if (ConfValue("options")->getBool("allowhalfop") && removed_modules.erase("m_halfop.so") == 0)
 815                 added_modules.push_back("m_halfop.so");
 816
 817         for (std::set<std::string>::iterator removing = removed_modules.begin(); removing != removed_modules.end(); removing++)
 818         {
 819                 // Don't remove cmd_*.so, just remove m_*.so
 820                 if (removing->c_str()[0] == 'c')
 821                         continue;
 822                 Module* m = ServerInstance->Modules->Find(*removing);
 823                 if (m && ServerInstance->Modules->Unload(m))
 824                 {
 825                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s",removing->c_str());
 826
 827                         if (user)
 828                                 user->WriteNumeric(RPL_UNLOADEDMODULE, "%s %s :Module %s successfully unloaded.",user->nick.c_str(), removing->c_str(), removing->c_str());
 829                         else
 830                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully unloaded.", removing->c_str());
 831                 }
 832                 else
 833                 {
 834                         if (user)
 835                                 user->WriteNumeric(ERR_CANTUNLOADMODULE, "%s %s :Failed to unload module %s: %s",user->nick.c_str(), removing->c_str(), removing->c_str(), ServerInstance->Modules->LastError().c_str());
 836                         else
 837                                  ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload module %s: %s", removing->c_str(), ServerInstance->Modules->LastError().c_str());
 838                 }
 839         }
 840
 841         for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 842         {
 843                 if (ServerInstance->Modules->Load(adding->c_str()))
 844                 {
 845                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
 846                         if (user)
 847                                 user->WriteNumeric(RPL_LOADEDMODULE, "%s %s :Module %s successfully loaded.",user->nick.c_str(), adding->c_str(), adding->c_str());
 848                         else
 849                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully loaded.", adding->c_str());
 850                 }
 851                 else
 852                 {
 853                         if (user)
 854                                 user->WriteNumeric(ERR_CANTLOADMODULE, "%s %s :Failed to load module %s: %s",user->nick.c_str(), adding->c_str(), adding->c_str(), ServerInstance->Modules->LastError().c_str());
 855                         else
 856                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
 857                 }
 858         }
 859 }
 860
 861 bool ServerConfig::StartsWithWindowsDriveLetter(const std::string &path)
 862 {
 863         return (path.length() > 2 && isalpha(path[0]) && path[1] == ':');
 864 }
 865
 866 ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 867 {
 868         ConfigTagList found = config_data.equal_range(tag);
 869         if (found.first == found.second)
 870                 return NULL;
 871         ConfigTag* rv = found.first->second;
 872         found.first++;
 873         if (found.first != found.second)
 874                 ServerInstance->Logs->Log("CONFIG",DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
 875                         "(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
 876         return rv;
 877 }
 878
 879 ConfigTagList ServerConfig::ConfTags(const std::string& tag)
 880 {
 881         return config_data.equal_range(tag);
 882 }
 883
 884 bool ServerConfig::FileExists(const char* file)
 885 {
 886         struct stat sb;
 887         if (stat(file, &sb) == -1)
 888                 return false;
 889
 890         if ((sb.st_mode & S_IFDIR) > 0)
 891                 return false;
 892
 893         FILE *input = fopen(file, "r");
 894         if (input == NULL)
 895                 return false;
 896         else
 897         {
 898                 fclose(input);
 899                 return true;
 900         }
 901 }
 902
 903 const char* ServerConfig::CleanFilename(const char* name)
 904 {
 905         const char* p = name + strlen(name);
 906         while ((p != name) && (*p != '/') && (*p != '\\')) p--;
 907         return (p != name ? ++p : p);
 908 }
 909
 910 const std::string& ServerConfig::GetSID()
 911 {
 912         return sid;
 913 }
 914
 915 void ConfigReaderThread::Run()
 916 {
 917         Config->Read();
 918         done = true;
 919 }
 920
 921 void ConfigReaderThread::Finish()
 922 {
 923         ServerConfig* old = ServerInstance->Config;
 924         ServerInstance->Logs->Log("CONFIG",DEBUG,"Switching to new configuration...");
 925         ServerInstance->Config = this->Config;
 926         Config->Apply(old, TheUserUID);
 927
 928         if (Config->valid)
 929         {
 930                 /*
 931                  * Apply the changed configuration from the rehash.
 932                  *
 933                  * XXX: The order of these is IMPORTANT, do not reorder them without testing
 934                  * thoroughly!!!
 935                  */
 936                 ServerInstance->XLines->CheckELines();
 937                 ServerInstance->XLines->ApplyLines();
 938                 ServerInstance->Res->Rehash();
 939                 ServerInstance->ResetMaxBans();
 940                 Config->ApplyDisabledCommands(Config->DisabledCommands);
 941                 User* user = ServerInstance->FindNick(TheUserUID);
 942                 FOREACH_MOD(I_OnRehash, OnRehash(user));
 943                 ServerInstance->BuildISupport();
 944
 945                 ServerInstance->Logs->CloseLogs();
 946                 ServerInstance->Logs->OpenFileLogs();
 947
 948                 if (Config->RawLog && !old->RawLog)
 949                         ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 950
 951                 Config = old;
 952         }
 953         else
 954         {
 955                 // whoops, abort!
 956                 ServerInstance->Config = old;
 957         }
 958 }