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 "commands/cmd_whowas.h"
  30 #include "configparser.h"
  31
  32 ServerConfig::ServerConfig()
  33 {
  34         WhoWasGroupSize = WhoWasMaxGroups = WhoWasMaxKeep = 0;
  35         RawLog = NoUserDns = HideBans = HideSplits = UndernetMsgPrefix = false;
  36         WildcardIPv6 = CycleHosts = InvBypassModes = true;
  37         dns_timeout = 5;
  38         MaxTargets = 20;
  39         NetBufferSize = 10240;
  40         SoftLimit = ServerInstance->SE->GetMaxFds();
  41         MaxConn = SOMAXCONN;
  42         MaxChans = 20;
  43         OperMaxChans = 30;
  44         c_ipv4_range = 32;
  45         c_ipv6_range = 128;
  46 }
  47
  48 void ServerConfig::Update005()
  49 {
  50         std::stringstream out(data005);
  51         std::vector<std::string> data;
  52         std::string token;
  53         while (out >> token)
  54                 data.push_back(token);
  55         sort(data.begin(), data.end());
  56
  57         std::string line5;
  58         isupport.clear();
  59         for(unsigned int i=0; i < data.size(); i++)
  60         {
  61                 token = data[i];
  62                 line5 = line5 + token + " ";
  63                 if (i % 13 == 12)
  64                 {
  65                         line5.append(":are supported by this server");
  66                         isupport.push_back(line5);
  67                         line5.clear();
  68                 }
  69         }
  70         if (!line5.empty())
  71         {
  72                 line5.append(":are supported by this server");
  73                 isupport.push_back(line5);
  74         }
  75 }
  76
  77 void ServerConfig::Send005(User* user)
  78 {
  79         for (std::vector<std::string>::iterator line = ServerInstance->Config->isupport.begin(); line != ServerInstance->Config->isupport.end(); line++)
  80                 user->WriteNumeric(RPL_ISUPPORT, "%s %s", user->nick.c_str(), line->c_str());
  81 }
  82
  83 template<typename T, typename V>
  84 static void range(T& value, V min, V max, V def, const char* msg)
  85 {
  86         if (value >= (T)min && value <= (T)max)
  87                 return;
  88         ServerInstance->Logs->Log("CONFIG", DEFAULT,
  89                 "WARNING: %s value of %ld is not between %ld and %ld; set to %ld.",
  90                 msg, (long)value, (long)min, (long)max, (long)def);
  91         value = def;
  92 }
  93
  94
  95 static void ValidIP(const std::string& ip, const std::string& key)
  96 {
  97         irc::sockets::sockaddrs dummy;
  98         if (!irc::sockets::aptosa(ip, 0, dummy))
  99                 throw CoreException("The value of "+key+" is not an IP address");
 100 }
 101
 102 static void ValidHost(const std::string& p, const std::string& msg)
 103 {
 104         int num_dots = 0;
 105         if (p.empty() || p[0] == '.')
 106                 throw CoreException("The value of "+msg+" is not a valid hostname");
 107         for (unsigned int i=0;i < p.length();i++)
 108         {
 109                 switch (p[i])
 110                 {
 111                         case ' ':
 112                                 throw CoreException("The value of "+msg+" is not a valid hostname");
 113                         case '.':
 114                                 num_dots++;
 115                         break;
 116                 }
 117         }
 118         if (num_dots == 0)
 119                 throw CoreException("The value of "+msg+" is not a valid hostname");
 120 }
 121
 122 bool ServerConfig::ApplyDisabledCommands(const std::string& data)
 123 {
 124         std::stringstream dcmds(data);
 125         std::string thiscmd;
 126
 127         /* Enable everything first */
 128         for (Commandtable::iterator x = ServerInstance->Parser->cmdlist.begin(); x != ServerInstance->Parser->cmdlist.end(); x++)
 129                 x->second->Disable(false);
 130
 131         /* Now disable all the ones which the user wants disabled */
 132         while (dcmds >> thiscmd)
 133         {
 134                 Commandtable::iterator cm = ServerInstance->Parser->cmdlist.find(thiscmd);
 135                 if (cm != ServerInstance->Parser->cmdlist.end())
 136                 {
 137                         cm->second->Disable(true);
 138                 }
 139         }
 140         return true;
 141 }
 142
 143 #ifdef WINDOWS
 144 // Note: the windows validator is in win32wrapper.cpp
 145 void FindDNS(std::string& server);
 146 #else
 147 static void FindDNS(std::string& server)
 148 {
 149         if (!server.empty())
 150                 return;
 151
 152         // attempt to look up their nameserver from /etc/resolv.conf
 153         ServerInstance->Logs->Log("CONFIG",DEFAULT,"WARNING: <dns:server> not defined, attempting to find working server in /etc/resolv.conf...");
 154
 155         std::ifstream resolv("/etc/resolv.conf");
 156
 157         while (resolv >> server)
 158         {
 159                 if (server == "nameserver")
 160                 {
 161                         resolv >> server;
 162                         if (server.find_first_not_of("0123456789.") == std::string::npos)
 163                         {
 164                                 ServerInstance->Logs->Log("CONFIG",DEFAULT,"<dns:server> set to '%s' as first resolver in /etc/resolv.conf.",server.c_str());
 165                                 return;
 166                         }
 167                 }
 168         }
 169
 170         ServerInstance->Logs->Log("CONFIG",DEFAULT,"/etc/resolv.conf contains no viable nameserver entries! Defaulting to nameserver '127.0.0.1'!");
 171         server = "127.0.0.1";
 172 }
 173 #endif
 174
 175 static void ReadXLine(ServerConfig* conf, const std::string& tag, const std::string& key, XLineFactory* make)
 176 {
 177         ConfigTagList tags = conf->ConfTags(tag);
 178         for(ConfigIter i = tags.first; i != tags.second; ++i)
 179         {
 180                 ConfigTag* ctag = i->second;
 181                 std::string mask;
 182                 if (!ctag->readString(key, mask))
 183                         throw CoreException("<"+tag+":"+key+"> missing at " + ctag->getTagLocation());
 184                 std::string reason = ctag->getString("reason", "<Config>");
 185                 XLine* xl = make->Generate(ServerInstance->Time(), 0, "<Config>", reason, mask);
 186                 if (!ServerInstance->XLines->AddLine(xl, NULL))
 187                         delete xl;
 188         }
 189 }
 190
 191 typedef std::map<std::string, ConfigTag*> LocalIndex;
 192 void ServerConfig::CrossCheckOperClassType()
 193 {
 194         LocalIndex operclass;
 195         ConfigTagList tags = ConfTags("class");
 196         for(ConfigIter i = tags.first; i != tags.second; ++i)
 197         {
 198                 ConfigTag* tag = i->second;
 199                 std::string name = tag->getString("name");
 200                 if (name.empty())
 201                         throw CoreException("<class:name> missing from tag at " + tag->getTagLocation());
 202                 if (operclass.find(name) != operclass.end())
 203                         throw CoreException("Duplicate class block with name " + name + " at " + tag->getTagLocation());
 204                 operclass[name] = tag;
 205         }
 206         tags = ConfTags("type");
 207         for(ConfigIter i = tags.first; i != tags.second; ++i)
 208         {
 209                 ConfigTag* tag = i->second;
 210                 std::string name = tag->getString("name");
 211                 if (name.empty())
 212                         throw CoreException("<type:name> is missing from tag at " + tag->getTagLocation());
 213                 if (!ServerInstance->IsNick(name.c_str(), Limits.NickMax))
 214                         throw CoreException("<type:name> is invalid (value '" + name + "')");
 215                 if (oper_blocks.find(" " + name) != oper_blocks.end())
 216                         throw CoreException("Duplicate type block with name " + name + " at " + tag->getTagLocation());
 217
 218                 OperInfo* ifo = new OperInfo;
 219                 oper_blocks[" " + name] = ifo;
 220                 ifo->name = name;
 221                 ifo->type_block = tag;
 222
 223                 std::string classname;
 224                 irc::spacesepstream str(tag->getString("classes"));
 225                 while (str.GetToken(classname))
 226                 {
 227                         LocalIndex::iterator cls = operclass.find(classname);
 228                         if (cls == operclass.end())
 229                                 throw CoreException("Oper type " + name + " has missing class " + classname);
 230                         ifo->class_blocks.push_back(cls->second);
 231                 }
 232         }
 233
 234         tags = ConfTags("oper");
 235         for(ConfigIter i = tags.first; i != tags.second; ++i)
 236         {
 237                 ConfigTag* tag = i->second;
 238
 239                 std::string name = tag->getString("name");
 240                 if (name.empty())
 241                         throw CoreException("<oper:name> missing from tag at " + tag->getTagLocation());
 242
 243                 std::string type = tag->getString("type");
 244                 OperIndex::iterator tblk = oper_blocks.find(" " + type);
 245                 if (tblk == oper_blocks.end())
 246                         throw CoreException("Oper block " + name + " has missing type " + type);
 247                 if (oper_blocks.find(name) != oper_blocks.end())
 248                         throw CoreException("Duplicate oper block with name " + name + " at " + tag->getTagLocation());
 249
 250                 OperInfo* ifo = new OperInfo;
 251                 ifo->name = type;
 252                 ifo->oper_block = tag;
 253                 ifo->type_block = tblk->second->type_block;
 254                 ifo->class_blocks.assign(tblk->second->class_blocks.begin(), tblk->second->class_blocks.end());
 255                 oper_blocks[name] = ifo;
 256         }
 257 }
 258
 259 void ServerConfig::CrossCheckConnectBlocks(ServerConfig* current)
 260 {
 261         typedef std::map<std::string, ConnectClass*> ClassMap;
 262         ClassMap oldBlocksByMask;
 263         if (current)
 264         {
 265                 for(ClassVector::iterator i = current->Classes.begin(); i != current->Classes.end(); ++i)
 266                 {
 267                         ConnectClass* c = *i;
 268                         if (c->name.substr(0, 8) != "unnamed-")
 269                         {
 270                                 oldBlocksByMask["n" + c->name] = c;
 271                         }
 272                         else if (c->type == CC_ALLOW || c->type == CC_DENY)
 273                         {
 274                                 std::string typeMask = (c->type == CC_ALLOW) ? "a" : "d";
 275                                 typeMask += c->host;
 276                                 oldBlocksByMask[typeMask] = c;
 277                         }
 278                 }
 279         }
 280
 281         int blk_count = config_data.count("connect");
 282         if (blk_count == 0)
 283         {
 284                 // No connect blocks found; make a trivial default block
 285                 std::vector<KeyVal>* items;
 286                 ConfigTag* tag = ConfigTag::create("connect", "<auto>", 0, items);
 287                 items->push_back(std::make_pair("allow", "*"));
 288                 config_data.insert(std::make_pair("connect", tag));
 289                 blk_count = 1;
 290         }
 291
 292         Classes.resize(blk_count);
 293         std::map<std::string, int> names;
 294
 295         bool try_again = true;
 296         for(int tries=0; try_again; tries++)
 297         {
 298                 try_again = false;
 299                 ConfigTagList tags = ConfTags("connect");
 300                 int i=0;
 301                 for(ConfigIter it = tags.first; it != tags.second; ++it, ++i)
 302                 {
 303                         ConfigTag* tag = it->second;
 304                         if (Classes[i])
 305                                 continue;
 306
 307                         ConnectClass* parent = NULL;
 308                         std::string parentName = tag->getString("parent");
 309                         if (!parentName.empty())
 310                         {
 311                                 std::map<std::string,int>::iterator parentIter = names.find(parentName);
 312                                 if (parentIter == names.end())
 313                                 {
 314                                         try_again = true;
 315                                         // couldn't find parent this time. If it's the last time, we'll never find it.
 316                                         if (tries >= blk_count)
 317                                                 throw CoreException("Could not find parent connect class \"" + parentName + "\" for connect block at " + tag->getTagLocation());
 318                                         continue;
 319                                 }
 320                                 parent = Classes[parentIter->second];
 321                         }
 322
 323                         std::string name = tag->getString("name");
 324                         std::string mask, typeMask;
 325                         char type;
 326
 327                         if (tag->readString("allow", mask, false))
 328                         {
 329                                 type = CC_ALLOW;
 330                                 typeMask = 'a' + mask;
 331                         }
 332                         else if (tag->readString("deny", mask, false))
 333                         {
 334                                 type = CC_DENY;
 335                                 typeMask = 'd' + mask;
 336                         }
 337                         else if (!name.empty())
 338                         {
 339                                 type = CC_NAMED;
 340                                 mask = name;
 341                                 typeMask = 'n' + mask;
 342                         }
 343                         else
 344                         {
 345                                 throw CoreException("Connect class must have allow, deny, or name specified at " + tag->getTagLocation());
 346                         }
 347
 348                         if (name.empty())
 349                         {
 350                                 name = "unnamed-" + ConvToStr(i);
 351                         }
 352                         else
 353                         {
 354                                 typeMask = 'n' + name;
 355                         }
 356
 357                         if (names.find(name) != names.end())
 358                                 throw CoreException("Two connect classes with name \"" + name + "\" defined!");
 359                         names[name] = i;
 360
 361                         ConnectClass* me = parent ?
 362                                 new ConnectClass(tag, type, mask, *parent) :
 363                                 new ConnectClass(tag, type, mask);
 364
 365                         me->name = name;
 366
 367                         me->registration_timeout = tag->getInt("timeout", me->registration_timeout);
 368                         me->pingtime = tag->getInt("pingfreq", me->pingtime);
 369                         std::string sendq;
 370                         if (tag->readString("sendq", sendq))
 371                         {
 372                                 // attempt to guess a good hard/soft sendq from a single value
 373                                 long value = atol(sendq.c_str());
 374                                 if (value > 16384)
 375                                         me->softsendqmax = value / 16;
 376                                 else
 377                                         me->softsendqmax = value;
 378                                 me->hardsendqmax = value * 8;
 379                         }
 380                         me->softsendqmax = tag->getInt("softsendq", me->softsendqmax);
 381                         me->hardsendqmax = tag->getInt("hardsendq", me->hardsendqmax);
 382                         me->recvqmax = tag->getInt("recvq", me->recvqmax);
 383                         me->penaltythreshold = tag->getInt("threshold", me->penaltythreshold);
 384                         me->commandrate = tag->getInt("commandrate", me->commandrate);
 385                         me->fakelag = tag->getBool("fakelag", me->fakelag);
 386                         me->maxlocal = tag->getInt("localmax", me->maxlocal);
 387                         me->maxglobal = tag->getInt("globalmax", me->maxglobal);
 388                         me->maxchans = tag->getInt("maxchans", me->maxchans);
 389                         me->maxconnwarn = tag->getBool("maxconnwarn", me->maxconnwarn);
 390                         me->limit = tag->getInt("limit", me->limit);
 391
 392                         ClassMap::iterator oldMask = oldBlocksByMask.find(typeMask);
 393                         if (oldMask != oldBlocksByMask.end())
 394                         {
 395                                 ConnectClass* old = oldMask->second;
 396                                 oldBlocksByMask.erase(oldMask);
 397                                 old->Update(me);
 398                                 delete me;
 399                                 me = old;
 400                         }
 401                         Classes[i] = me;
 402                 }
 403         }
 404 }
 405
 406 /** Represents a deprecated configuration tag.
 407  */
 408 struct Deprecated
 409 {
 410         /** Tag name
 411          */
 412         const char* tag;
 413         /** Tag value
 414          */
 415         const char* value;
 416         /** Reason for deprecation
 417          */
 418         const char* reason;
 419 };
 420
 421 static const Deprecated ChangedConfig[] = {
 422         {"options", "hidelinks",                "has been moved to <security:hidelinks> as of 1.2a3"},
 423         {"options", "hidewhois",                "has been moved to <security:hidewhois> as of 1.2a3"},
 424         {"options", "userstats",                "has been moved to <security:userstats> as of 1.2a3"},
 425         {"options", "customversion",    "has been moved to <security:customversion> as of 1.2a3"},
 426         {"options", "hidesplits",               "has been moved to <security:hidesplits> as of 1.2a3"},
 427         {"options", "hidebans",         "has been moved to <security:hidebans> as of 1.2a3"},
 428         {"options", "hidekills",                "has been moved to <security:hidekills> as of 1.2a3"},
 429         {"options", "operspywhois",             "has been moved to <security:operspywhois> as of 1.2a3"},
 430         {"options", "announceinvites",  "has been moved to <security:announceinvites> as of 1.2a3"},
 431         {"options", "hidemodes",                "has been moved to <security:hidemodes> as of 1.2a3"},
 432         {"options", "maxtargets",               "has been moved to <security:maxtargets> as of 1.2a3"},
 433         {"options",     "nouserdns",            "has been moved to <performance:nouserdns> as of 1.2a3"},
 434         {"options",     "maxwho",               "has been moved to <performance:maxwho> as of 1.2a3"},
 435         {"options",     "softlimit",            "has been moved to <performance:softlimit> as of 1.2a3"},
 436         {"options", "somaxconn",                "has been moved to <performance:somaxconn> as of 1.2a3"},
 437         {"options", "netbuffersize",    "has been moved to <performance:netbuffersize> as of 1.2a3"},
 438         {"options", "maxwho",           "has been moved to <performance:maxwho> as of 1.2a3"},
 439         {"options",     "loglevel",             "1.2 does not use the loglevel value. Please define <log> tags instead."},
 440         {"die",     "value",            "you need to reread your config"},
 441 };
 442
 443 void ServerConfig::Fill()
 444 {
 445         ConfigTag* options = ConfValue("options");
 446         ConfigTag* security = ConfValue("security");
 447         if (sid.empty())
 448         {
 449                 ServerName = ConfValue("server")->getString("name");
 450                 sid = ConfValue("server")->getString("id");
 451                 ValidHost(ServerName, "<server:name>");
 452                 if (!sid.empty() && !ServerInstance->IsSID(sid))
 453                         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.");
 454         }
 455         else
 456         {
 457                 if (ServerName != ConfValue("server")->getString("name"))
 458                         throw CoreException("You must restart to change the server name or SID");
 459                 std::string nsid = ConfValue("server")->getString("id");
 460                 if (!nsid.empty() && nsid != sid)
 461                         throw CoreException("You must restart to change the server name or SID");
 462         }
 463         diepass = ConfValue("power")->getString("diepass");
 464         restartpass = ConfValue("power")->getString("restartpass");
 465         powerhash = ConfValue("power")->getString("hash");
 466         PrefixQuit = options->getString("prefixquit");
 467         SuffixQuit = options->getString("suffixquit");
 468         FixedQuit = options->getString("fixedquit");
 469         PrefixPart = options->getString("prefixpart");
 470         SuffixPart = options->getString("suffixpart");
 471         FixedPart = options->getString("fixedpart");
 472         SoftLimit = ConfValue("performance")->getInt("softlimit", ServerInstance->SE->GetMaxFds());
 473         MaxConn = ConfValue("performance")->getInt("somaxconn", SOMAXCONN);
 474         MoronBanner = options->getString("moronbanner", "You're banned!");
 475         ServerDesc = ConfValue("server")->getString("description", "Configure Me");
 476         Network = ConfValue("server")->getString("network", "Network");
 477         AdminName = ConfValue("admin")->getString("name", "");
 478         AdminEmail = ConfValue("admin")->getString("email", "null@example.com");
 479         AdminNick = ConfValue("admin")->getString("nick", "admin");
 480         ModPath = ConfValue("path")->getString("moduledir", MOD_PATH);
 481         NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240);
 482         dns_timeout = ConfValue("dns")->getInt("timeout", 5);
 483         DisabledCommands = ConfValue("disabled")->getString("commands", "");
 484         DisabledDontExist = ConfValue("disabled")->getBool("fakenonexistant");
 485         UserStats = security->getString("userstats");
 486         CustomVersion = security->getString("customversion", Network + " IRCd");
 487         HideSplits = security->getBool("hidesplits");
 488         HideBans = security->getBool("hidebans");
 489         HideWhoisServer = security->getString("hidewhois");
 490         HideKillsServer = security->getString("hidekills");
 491         RestrictBannedUsers = security->getBool("restrictbannedusers", true);
 492         GenericOper = security->getBool("genericoper");
 493         NoUserDns = ConfValue("performance")->getBool("nouserdns");
 494         SyntaxHints = options->getBool("syntaxhints");
 495         CycleHosts = options->getBool("cyclehosts");
 496         CycleHostsFromUser = options->getBool("cyclehostsfromuser");
 497         UndernetMsgPrefix = options->getBool("ircumsgprefix");
 498         FullHostInTopic = options->getBool("hostintopic");
 499         MaxTargets = security->getInt("maxtargets", 20);
 500         DefaultModes = options->getString("defaultmodes", "nt");
 501         PID = ConfValue("pid")->getString("file");
 502         WhoWasGroupSize = ConfValue("whowas")->getInt("groupsize");
 503         WhoWasMaxGroups = ConfValue("whowas")->getInt("maxgroups");
 504         WhoWasMaxKeep = ServerInstance->Duration(ConfValue("whowas")->getString("maxkeep"));
 505         MaxChans = ConfValue("channels")->getInt("users", 20);
 506         OperMaxChans = ConfValue("channels")->getInt("opers", 60);
 507         c_ipv4_range = ConfValue("cidr")->getInt("ipv4clone", 32);
 508         c_ipv6_range = ConfValue("cidr")->getInt("ipv6clone", 128);
 509         Limits.NickMax = ConfValue("limits")->getInt("maxnick", 32);
 510         Limits.ChanMax = ConfValue("limits")->getInt("maxchan", 64);
 511         Limits.MaxModes = ConfValue("limits")->getInt("maxmodes", 20);
 512         Limits.IdentMax = ConfValue("limits")->getInt("maxident", 11);
 513         Limits.MaxQuit = ConfValue("limits")->getInt("maxquit", 255);
 514         Limits.MaxTopic = ConfValue("limits")->getInt("maxtopic", 307);
 515         Limits.MaxKick = ConfValue("limits")->getInt("maxkick", 255);
 516         Limits.MaxGecos = ConfValue("limits")->getInt("maxgecos", 128);
 517         Limits.MaxAway = ConfValue("limits")->getInt("maxaway", 200);
 518         InvBypassModes = options->getBool("invitebypassmodes", true);
 519         NoSnoticeStack = options->getBool("nosnoticestack", false);
 520
 521         range(SoftLimit, 10, ServerInstance->SE->GetMaxFds(), ServerInstance->SE->GetMaxFds(), "<performance:softlimit>");
 522         range(MaxConn, 0, SOMAXCONN, SOMAXCONN, "<performance:somaxconn>");
 523         range(MaxTargets, 1, 31, 20, "<security:maxtargets>");
 524         range(NetBufferSize, 1024, 65534, 10240, "<performance:netbuffersize>");
 525         range(WhoWasGroupSize, 0, 10000, 10, "<whowas:groupsize>");
 526         range(WhoWasMaxGroups, 0, 1000000, 10240, "<whowas:maxgroups>");
 527         range(WhoWasMaxKeep, 3600, INT_MAX, 3600, "<whowas:maxkeep>");
 528
 529         ValidIP(DNSServer, "<dns:server>");
 530
 531         std::string defbind = options->getString("defaultbind");
 532         if (assign(defbind) == "ipv4")
 533         {
 534                 WildcardIPv6 = false;
 535         }
 536         else if (assign(defbind) == "ipv6")
 537         {
 538                 WildcardIPv6 = true;
 539         }
 540         else
 541         {
 542                 WildcardIPv6 = true;
 543                 int socktest = socket(AF_INET6, SOCK_STREAM, 0);
 544                 if (socktest < 0)
 545                         WildcardIPv6 = false;
 546                 else
 547                         ServerInstance->SE->Close(socktest);
 548         }
 549         ConfigTagList tags = ConfTags("uline");
 550         for(ConfigIter i = tags.first; i != tags.second; ++i)
 551         {
 552                 ConfigTag* tag = i->second;
 553                 std::string server;
 554                 if (!tag->readString("server", server))
 555                         throw CoreException("<uline> tag missing server at " + tag->getTagLocation());
 556                 ulines[assign(server)] = tag->getBool("silent");
 557         }
 558
 559         tags = ConfTags("banlist");
 560         for(ConfigIter i = tags.first; i != tags.second; ++i)
 561         {
 562                 ConfigTag* tag = i->second;
 563                 std::string chan;
 564                 if (!tag->readString("chan", chan))
 565                         throw CoreException("<banlist> tag missing chan at " + tag->getTagLocation());
 566                 maxbans[chan] = tag->getInt("limit");
 567         }
 568
 569         ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
 570         ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
 571         ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
 572         ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));
 573
 574         memset(DisabledUModes, 0, sizeof(DisabledUModes));
 575         for (const unsigned char* p = (const unsigned char*)ConfValue("disabled")->getString("usermodes").c_str(); *p; ++p)
 576         {
 577                 if (*p < 'A' || *p > ('A' + 64)) throw CoreException(std::string("Invalid usermode ")+(char)*p+" was found.");
 578                 DisabledUModes[*p - 'A'] = 1;
 579         }
 580
 581         memset(DisabledCModes, 0, sizeof(DisabledCModes));
 582         for (const unsigned char* p = (const unsigned char*)ConfValue("disabled")->getString("chanmodes").c_str(); *p; ++p)
 583         {
 584                 if (*p < 'A' || *p > ('A' + 64)) throw CoreException(std::string("Invalid chanmode ")+(char)*p+" was found.");
 585                 DisabledCModes[*p - 'A'] = 1;
 586         }
 587
 588         memset(HideModeLists, 0, sizeof(HideModeLists));
 589         for (const unsigned char* p = (const unsigned char*)ConfValue("security")->getString("hidemodes").c_str(); *p; ++p)
 590                 HideModeLists[*p] = true;
 591
 592         std::string v = security->getString("announceinvites");
 593
 594         if (v == "ops")
 595                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_OPS;
 596         else if (v == "all")
 597                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_ALL;
 598         else if (v == "dynamic")
 599                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_DYNAMIC;
 600         else
 601                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_NONE;
 602
 603         v = security->getString("operspywhois");
 604         if (v == "splitmsg")
 605                 OperSpyWhois = SPYWHOIS_SPLITMSG;
 606         else if (v == "on" || v == "yes")
 607                 OperSpyWhois = SPYWHOIS_SINGLEMSG;
 608         else
 609                 OperSpyWhois = SPYWHOIS_NONE;
 610
 611         Limits.Finalise();
 612 }
 613
 614 // WARNING: it is not safe to use most of the codebase in this function, as it
 615 // will run in the config reader thread
 616 void ServerConfig::Read()
 617 {
 618         /* Load and parse the config file, if there are any errors then explode */
 619
 620         ParseStack stack(this);
 621         try
 622         {
 623                 valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
 624         }
 625         catch (CoreException& err)
 626         {
 627                 valid = false;
 628                 errstr << err.GetReason();
 629         }
 630         if (valid)
 631         {
 632                 DNSServer = ConfValue("dns")->getString("server");
 633                 FindDNS(DNSServer);
 634         }
 635 }
 636
 637 void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
 638 {
 639         valid = true;
 640         if (old)
 641         {
 642                 /*
 643                  * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
 644                  */
 645                 this->ServerName = old->ServerName;
 646                 this->sid = old->sid;
 647                 this->cmdline = old->cmdline;
 648         }
 649
 650         /* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
 651         try
 652         {
 653                 for (int Index = 0; Index * sizeof(Deprecated) < sizeof(ChangedConfig); Index++)
 654                 {
 655                         std::string dummy;
 656                         if (ConfValue(ChangedConfig[Index].tag)->readString(ChangedConfig[Index].value, dummy, true))
 657                                 errstr << "Your configuration contains a deprecated value: <"
 658                                         << ChangedConfig[Index].tag << ":" << ChangedConfig[Index].value << "> - " << ChangedConfig[Index].reason
 659                                         << " (at " << ConfValue(ChangedConfig[Index].tag)->getTagLocation() << ")\n";
 660                 }
 661
 662                 Fill();
 663
 664                 // Handle special items
 665                 CrossCheckOperClassType();
 666                 CrossCheckConnectBlocks(old);
 667         }
 668         catch (CoreException &ce)
 669         {
 670                 errstr << ce.GetReason();
 671         }
 672
 673         // Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
 674         valid = errstr.str().empty();
 675
 676         // write once here, to try it out and make sure its ok
 677         if (valid)
 678                 ServerInstance->WritePID(this->PID);
 679
 680         if (old)
 681         {
 682                 // On first run, ports are bound later on
 683                 FailedPortList pl;
 684                 ServerInstance->BindPorts(pl);
 685                 if (pl.size())
 686                 {
 687                         errstr << "Not all your client ports could be bound.\nThe following port(s) failed to bind:\n";
 688
 689                         int j = 1;
 690                         for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 691                         {
 692                                 char buf[MAXBUF];
 693                                 snprintf(buf, MAXBUF, "%d.   Address: %s   Reason: %s\n", j, i->first.empty() ? "<all>" : i->first.c_str(), i->second.c_str());
 694                                 errstr << buf;
 695                         }
 696                 }
 697         }
 698
 699         User* user = useruid.empty() ? NULL : ServerInstance->FindNick(useruid);
 700
 701         if (!valid)
 702                 ServerInstance->Logs->Log("CONFIG",DEFAULT, "There were errors in your configuration file:");
 703
 704         while (errstr.good())
 705         {
 706                 std::string line;
 707                 getline(errstr, line, '\n');
 708                 if (line.empty())
 709                         continue;
 710                 // On startup, print out to console (still attached at this point)
 711                 if (!old)
 712                         printf("%s\n", line.c_str());
 713                 // If a user is rehashing, tell them directly
 714                 if (user)
 715                         user->SendText(":%s NOTICE %s :*** %s", ServerInstance->Config->ServerName.c_str(), user->nick.c_str(), line.c_str());
 716                 // Also tell opers
 717                 ServerInstance->SNO->WriteGlobalSno('a', line);
 718         }
 719
 720         errstr.clear();
 721         errstr.str(std::string());
 722
 723         /* No old configuration -> initial boot, nothing more to do here */
 724         if (!old)
 725         {
 726                 if (!valid)
 727                 {
 728                         ServerInstance->Exit(EXIT_STATUS_CONFIG);
 729                 }
 730
 731                 return;
 732         }
 733
 734         // If there were errors processing configuration, don't touch modules.
 735         if (!valid)
 736                 return;
 737
 738         ApplyModules(user);
 739
 740         if (user)
 741                 user->SendText(":%s NOTICE %s :*** Successfully rehashed server.",
 742                         ServerInstance->Config->ServerName.c_str(), user->nick.c_str());
 743         ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
 744 }
 745
 746 void ServerConfig::ApplyModules(User* user)
 747 {
 748         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 749         if (whowas)
 750                 WhowasRequest(NULL, whowas, WhowasRequest::WHOWAS_PRUNE).Send();
 751
 752         const std::vector<std::string> v = ServerInstance->Modules->GetAllModuleNames(0);
 753         std::vector<std::string> added_modules;
 754         std::set<std::string> removed_modules(v.begin(), v.end());
 755
 756         ConfigTagList tags = ConfTags("module");
 757         for(ConfigIter i = tags.first; i != tags.second; ++i)
 758         {
 759                 ConfigTag* tag = i->second;
 760                 std::string name;
 761                 if (tag->readString("name", name))
 762                 {
 763                         // if this module is already loaded, the erase will succeed, so we need do nothing
 764                         // otherwise, we need to add the module (which will be done later)
 765                         if (removed_modules.erase(name) == 0)
 766                                 added_modules.push_back(name);
 767                 }
 768         }
 769
 770         if (ConfValue("options")->getBool("allowhalfop") && removed_modules.erase("m_halfop.so") == 0)
 771                 added_modules.push_back("m_halfop.so");
 772
 773         for (std::set<std::string>::iterator removing = removed_modules.begin(); removing != removed_modules.end(); removing++)
 774         {
 775                 // Don't remove cmd_*.so, just remove m_*.so
 776                 if (removing->c_str()[0] == 'c')
 777                         continue;
 778                 Module* m = ServerInstance->Modules->Find(*removing);
 779                 if (m && ServerInstance->Modules->Unload(m))
 780                 {
 781                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s",removing->c_str());
 782
 783                         if (user)
 784                                 user->WriteNumeric(RPL_UNLOADEDMODULE, "%s %s :Module %s successfully unloaded.",user->nick.c_str(), removing->c_str(), removing->c_str());
 785                         else
 786                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully unloaded.", removing->c_str());
 787                 }
 788                 else
 789                 {
 790                         if (user)
 791                                 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());
 792                         else
 793                                  ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload module %s: %s", removing->c_str(), ServerInstance->Modules->LastError().c_str());
 794                 }
 795         }
 796
 797         for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 798         {
 799                 if (ServerInstance->Modules->Load(adding->c_str()))
 800                 {
 801                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
 802                         if (user)
 803                                 user->WriteNumeric(RPL_LOADEDMODULE, "%s %s :Module %s successfully loaded.",user->nick.c_str(), adding->c_str(), adding->c_str());
 804                         else
 805                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully loaded.", adding->c_str());
 806                 }
 807                 else
 808                 {
 809                         if (user)
 810                                 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());
 811                         else
 812                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
 813                 }
 814         }
 815 }
 816
 817 bool ServerConfig::StartsWithWindowsDriveLetter(const std::string &path)
 818 {
 819         return (path.length() > 2 && isalpha(path[0]) && path[1] == ':');
 820 }
 821
 822 ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 823 {
 824         ConfigTagList found = config_data.equal_range(tag);
 825         if (found.first == found.second)
 826                 return NULL;
 827         ConfigTag* rv = found.first->second;
 828         found.first++;
 829         if (found.first != found.second)
 830                 ServerInstance->Logs->Log("CONFIG",DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
 831                         "(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
 832         return rv;
 833 }
 834
 835 ConfigTagList ServerConfig::ConfTags(const std::string& tag)
 836 {
 837         return config_data.equal_range(tag);
 838 }
 839
 840 bool ServerConfig::FileExists(const char* file)
 841 {
 842         struct stat sb;
 843         if (stat(file, &sb) == -1)
 844                 return false;
 845
 846         if ((sb.st_mode & S_IFDIR) > 0)
 847                 return false;
 848
 849         FILE *input = fopen(file, "r");
 850         if (input == NULL)
 851                 return false;
 852         else
 853         {
 854                 fclose(input);
 855                 return true;
 856         }
 857 }
 858
 859 const char* ServerConfig::CleanFilename(const char* name)
 860 {
 861         const char* p = name + strlen(name);
 862         while ((p != name) && (*p != '/') && (*p != '\\')) p--;
 863         return (p != name ? ++p : p);
 864 }
 865
 866 std::string ServerConfig::GetSID()
 867 {
 868         return sid;
 869 }
 870
 871 void ConfigReaderThread::Run()
 872 {
 873         Config->Read();
 874         done = true;
 875 }
 876
 877 void ConfigReaderThread::Finish()
 878 {
 879         ServerConfig* old = ServerInstance->Config;
 880         ServerInstance->Logs->Log("CONFIG",DEBUG,"Switching to new configuration...");
 881         ServerInstance->Config = this->Config;
 882         Config->Apply(old, TheUserUID);
 883
 884         if (Config->valid)
 885         {
 886                 /*
 887                  * Apply the changed configuration from the rehash.
 888                  *
 889                  * XXX: The order of these is IMPORTANT, do not reorder them without testing
 890                  * thoroughly!!!
 891                  */
 892                 ServerInstance->XLines->CheckELines();
 893                 ServerInstance->XLines->ApplyLines();
 894                 ServerInstance->Res->Rehash();
 895                 ServerInstance->ResetMaxBans();
 896                 Config->ApplyDisabledCommands(Config->DisabledCommands);
 897                 User* user = ServerInstance->FindNick(TheUserUID);
 898                 FOREACH_MOD(I_OnRehash, OnRehash(user));
 899                 ServerInstance->BuildISupport();
 900
 901                 ServerInstance->Logs->CloseLogs();
 902                 ServerInstance->Logs->OpenFileLogs();
 903
 904                 if (Config->RawLog && !old->RawLog)
 905                         ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 906
 907                 Config = old;
 908         }
 909         else
 910         {
 911                 // whoops, abort!
 912                 ServerInstance->Config = old;
 913         }
 914 }