src/configreader.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2010 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *          the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include <fstream>
  16 #include "xline.h"
  17 #include "exitcodes.h"
  18 #include "commands/cmd_whowas.h"
  19 #include "configparser.h"
  20
  21 ServerConfig::ServerConfig()
  22 {
  23         WhoWasGroupSize = WhoWasMaxGroups = WhoWasMaxKeep = 0;
  24         RawLog = NoUserDns = HideBans = HideSplits = UndernetMsgPrefix = false;
  25         WildcardIPv6 = CycleHosts = InvBypassModes = true;
  26         dns_timeout = 5;
  27         MaxTargets = 20;
  28         NetBufferSize = 10240;
  29         SoftLimit = ServerInstance->SE->GetMaxFds();
  30         MaxConn = SOMAXCONN;
  31         MaxChans = 20;
  32         OperMaxChans = 30;
  33         c_ipv4_range = 32;
  34         c_ipv6_range = 128;
  35 }
  36
  37 void ServerConfig::Update005()
  38 {
  39         std::stringstream out(data005);
  40         std::vector<std::string> data;
  41         std::string token;
  42         while (out >> token)
  43                 data.push_back(token);
  44         sort(data.begin(), data.end());
  45
  46         std::string line5;
  47         isupport.clear();
  48         for(unsigned int i=0; i < data.size(); i++)
  49         {
  50                 token = data[i];
  51                 line5 = line5 + token + " ";
  52                 if (i % 13 == 12)
  53                 {
  54                         line5.append(":are supported by this server");
  55                         isupport.push_back(line5);
  56                         line5.clear();
  57                 }
  58         }
  59         if (!line5.empty())
  60         {
  61                 line5.append(":are supported by this server");
  62                 isupport.push_back(line5);
  63         }
  64 }
  65
  66 void ServerConfig::Send005(User* user)
  67 {
  68         for (std::vector<std::string>::iterator line = ServerInstance->Config->isupport.begin(); line != ServerInstance->Config->isupport.end(); line++)
  69                 user->WriteNumeric(RPL_ISUPPORT, "%s %s", user->nick.c_str(), line->c_str());
  70 }
  71
  72 template<typename T, typename V>
  73 static void range(T& value, V min, V max, V def, const char* msg)
  74 {
  75         if (value >= (T)min && value <= (T)max)
  76                 return;
  77         ServerInstance->Logs->Log("CONFIG", DEFAULT,
  78                 "WARNING: %s value of %ld is not between %ld and %ld; set to %ld.",
  79                 msg, (long)value, (long)min, (long)max, (long)def);
  80         value = def;
  81 }
  82
  83
  84 static void ValidIP(const std::string& ip, const std::string& key)
  85 {
  86         irc::sockets::sockaddrs dummy;
  87         if (!irc::sockets::aptosa(ip, 0, dummy))
  88                 throw CoreException("The value of "+key+" is not an IP address");
  89 }
  90
  91 static void ValidHost(const std::string& p, const std::string& msg)
  92 {
  93         int num_dots = 0;
  94         if (p.empty() || p[0] == '.')
  95                 throw CoreException("The value of "+msg+" is not a valid hostname");
  96         for (unsigned int i=0;i < p.length();i++)
  97         {
  98                 switch (p[i])
  99                 {
 100                         case ' ':
 101                                 throw CoreException("The value of "+msg+" is not a valid hostname");
 102                         case '.':
 103                                 num_dots++;
 104                         break;
 105                 }
 106         }
 107         if (num_dots == 0)
 108                 throw CoreException("The value of "+msg+" is not a valid hostname");
 109 }
 110
 111 bool ServerConfig::ApplyDisabledCommands(const std::string& data)
 112 {
 113         std::stringstream dcmds(data);
 114         std::string thiscmd;
 115
 116         /* Enable everything first */
 117         for (Commandtable::iterator x = ServerInstance->Parser->cmdlist.begin(); x != ServerInstance->Parser->cmdlist.end(); x++)
 118                 x->second->Disable(false);
 119
 120         /* Now disable all the ones which the user wants disabled */
 121         while (dcmds >> thiscmd)
 122         {
 123                 Commandtable::iterator cm = ServerInstance->Parser->cmdlist.find(thiscmd);
 124                 if (cm != ServerInstance->Parser->cmdlist.end())
 125                 {
 126                         cm->second->Disable(true);
 127                 }
 128         }
 129         return true;
 130 }
 131
 132 #ifdef WINDOWS
 133 // Note: the windows validator is in win32wrapper.cpp
 134 void FindDNS(std::string& server);
 135 #else
 136 static void FindDNS(std::string& server)
 137 {
 138         if (!server.empty())
 139                 return;
 140
 141         // attempt to look up their nameserver from /etc/resolv.conf
 142         ServerInstance->Logs->Log("CONFIG",DEFAULT,"WARNING: <dns:server> not defined, attempting to find working server in /etc/resolv.conf...");
 143
 144         std::ifstream resolv("/etc/resolv.conf");
 145
 146         while (resolv >> server)
 147         {
 148                 if (server == "nameserver")
 149                 {
 150                         resolv >> server;
 151                         if (server.find_first_not_of("0123456789.") == std::string::npos)
 152                         {
 153                                 ServerInstance->Logs->Log("CONFIG",DEFAULT,"<dns:server> set to '%s' as first resolver in /etc/resolv.conf.",server.c_str());
 154                                 return;
 155                         }
 156                 }
 157         }
 158
 159         ServerInstance->Logs->Log("CONFIG",DEFAULT,"/etc/resolv.conf contains no viable nameserver entries! Defaulting to nameserver '127.0.0.1'!");
 160         server = "127.0.0.1";
 161 }
 162 #endif
 163
 164 static void ReadXLine(ServerConfig* conf, const std::string& tag, const std::string& key, XLineFactory* make)
 165 {
 166         ConfigTagList tags = conf->ConfTags(tag);
 167         for(ConfigIter i = tags.first; i != tags.second; ++i)
 168         {
 169                 ConfigTag* ctag = i->second;
 170                 std::string mask;
 171                 if (!ctag->readString(key, mask))
 172                         throw CoreException("<"+tag+":"+key+"> missing at " + ctag->getTagLocation());
 173                 std::string reason = ctag->getString("reason", "<Config>");
 174                 XLine* xl = make->Generate(ServerInstance->Time(), 0, "<Config>", reason, mask);
 175                 if (!ServerInstance->XLines->AddLine(xl, NULL))
 176                         delete xl;
 177         }
 178 }
 179
 180 typedef std::map<std::string, ConfigTag*> LocalIndex;
 181 void ServerConfig::CrossCheckOperClassType()
 182 {
 183         LocalIndex operclass;
 184         ConfigTagList tags = ConfTags("class");
 185         for(ConfigIter i = tags.first; i != tags.second; ++i)
 186         {
 187                 ConfigTag* tag = i->second;
 188                 std::string name = tag->getString("name");
 189                 if (name.empty())
 190                         throw CoreException("<class:name> missing from tag at " + tag->getTagLocation());
 191                 if (operclass.find(name) != operclass.end())
 192                         throw CoreException("Duplicate class block with name " + name + " at " + tag->getTagLocation());
 193                 operclass[name] = tag;
 194         }
 195         tags = ConfTags("type");
 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("<type:name> is missing from tag at " + tag->getTagLocation());
 202                 if (!ServerInstance->IsNick(name.c_str(), Limits.NickMax))
 203                         throw CoreException("<type:name> is invalid (value '" + name + "')");
 204                 if (oper_blocks.find(" " + name) != oper_blocks.end())
 205                         throw CoreException("Duplicate type block with name " + name + " at " + tag->getTagLocation());
 206
 207                 OperInfo* ifo = new OperInfo;
 208                 oper_blocks[" " + name] = ifo;
 209                 ifo->name = name;
 210                 ifo->type_block = tag;
 211
 212                 std::string classname;
 213                 irc::spacesepstream str(tag->getString("classes"));
 214                 while (str.GetToken(classname))
 215                 {
 216                         LocalIndex::iterator cls = operclass.find(classname);
 217                         if (cls == operclass.end())
 218                                 throw CoreException("Oper type " + name + " has missing class " + classname);
 219                         ifo->class_blocks.push_back(cls->second);
 220                 }
 221         }
 222
 223         tags = ConfTags("oper");
 224         for(ConfigIter i = tags.first; i != tags.second; ++i)
 225         {
 226                 ConfigTag* tag = i->second;
 227
 228                 std::string name = tag->getString("name");
 229                 if (name.empty())
 230                         throw CoreException("<oper:name> missing from tag at " + tag->getTagLocation());
 231
 232                 std::string type = tag->getString("type");
 233                 OperIndex::iterator tblk = oper_blocks.find(" " + type);
 234                 if (tblk == oper_blocks.end())
 235                         throw CoreException("Oper block " + name + " has missing type " + type);
 236                 if (oper_blocks.find(name) != oper_blocks.end())
 237                         throw CoreException("Duplicate oper block with name " + name + " at " + tag->getTagLocation());
 238
 239                 OperInfo* ifo = new OperInfo;
 240                 ifo->name = type;
 241                 ifo->oper_block = tag;
 242                 ifo->type_block = tblk->second->type_block;
 243                 ifo->class_blocks.assign(tblk->second->class_blocks.begin(), tblk->second->class_blocks.end());
 244                 oper_blocks[name] = ifo;
 245         }
 246 }
 247
 248 void ServerConfig::CrossCheckConnectBlocks(ServerConfig* current)
 249 {
 250         typedef std::map<std::string, ConnectClass*> ClassMap;
 251         ClassMap oldBlocksByMask;
 252         if (current)
 253         {
 254                 for(ClassVector::iterator i = current->Classes.begin(); i != current->Classes.end(); ++i)
 255                 {
 256                         ConnectClass* c = *i;
 257                         if (c->name.substr(0, 8) != "unnamed-")
 258                         {
 259                                 oldBlocksByMask["n" + c->name] = c;
 260                         }
 261                         else if (c->type == CC_ALLOW || c->type == CC_DENY)
 262                         {
 263                                 std::string typeMask = (c->type == CC_ALLOW) ? "a" : "d";
 264                                 typeMask += c->host;
 265                                 oldBlocksByMask[typeMask] = c;
 266                         }
 267                 }
 268         }
 269
 270         int blk_count = config_data.count("connect");
 271         if (blk_count == 0)
 272         {
 273                 // No connect blocks found; make a trivial default block
 274                 std::vector<KeyVal>* items;
 275                 ConfigTag* tag = ConfigTag::create("connect", "<auto>", 0, items);
 276                 items->push_back(std::make_pair("allow", "*"));
 277                 config_data.insert(std::make_pair("connect", tag));
 278                 blk_count = 1;
 279         }
 280
 281         Classes.resize(blk_count);
 282         std::map<std::string, int> names;
 283
 284         bool try_again = true;
 285         for(int tries=0; try_again; tries++)
 286         {
 287                 try_again = false;
 288                 ConfigTagList tags = ConfTags("connect");
 289                 int i=0;
 290                 for(ConfigIter it = tags.first; it != tags.second; ++it, ++i)
 291                 {
 292                         ConfigTag* tag = it->second;
 293                         if (Classes[i])
 294                                 continue;
 295
 296                         ConnectClass* parent = NULL;
 297                         std::string parentName = tag->getString("parent");
 298                         if (!parentName.empty())
 299                         {
 300                                 std::map<std::string,int>::iterator parentIter = names.find(parentName);
 301                                 if (parentIter == names.end())
 302                                 {
 303                                         try_again = true;
 304                                         // couldn't find parent this time. If it's the last time, we'll never find it.
 305                                         if (tries >= blk_count)
 306                                                 throw CoreException("Could not find parent connect class \"" + parentName + "\" for connect block at " + tag->getTagLocation());
 307                                         continue;
 308                                 }
 309                                 parent = Classes[parentIter->second];
 310                         }
 311
 312                         std::string name = tag->getString("name");
 313                         std::string mask, typeMask;
 314                         char type;
 315
 316                         if (tag->readString("allow", mask, false))
 317                         {
 318                                 type = CC_ALLOW;
 319                                 typeMask = 'a' + mask;
 320                         }
 321                         else if (tag->readString("deny", mask, false))
 322                         {
 323                                 type = CC_DENY;
 324                                 typeMask = 'd' + mask;
 325                         }
 326                         else if (!name.empty())
 327                         {
 328                                 type = CC_NAMED;
 329                                 mask = name;
 330                                 typeMask = 'n' + mask;
 331                         }
 332                         else
 333                         {
 334                                 throw CoreException("Connect class must have allow, deny, or name specified at " + tag->getTagLocation());
 335                         }
 336
 337                         if (name.empty())
 338                         {
 339                                 name = "unnamed-" + ConvToStr(i);
 340                         }
 341                         else
 342                         {
 343                                 typeMask = 'n' + name;
 344                         }
 345
 346                         if (names.find(name) != names.end())
 347                                 throw CoreException("Two connect classes with name \"" + name + "\" defined!");
 348                         names[name] = i;
 349
 350                         ConnectClass* me = parent ?
 351                                 new ConnectClass(tag, type, mask, *parent) :
 352                                 new ConnectClass(tag, type, mask);
 353
 354                         me->name = name;
 355
 356                         me->registration_timeout = tag->getInt("timeout", me->registration_timeout);
 357                         me->pingtime = tag->getInt("pingfreq", me->pingtime);
 358                         std::string sendq;
 359                         if (tag->readString("sendq", sendq))
 360                         {
 361                                 // attempt to guess a good hard/soft sendq from a single value
 362                                 long value = atol(sendq.c_str());
 363                                 if (value > 16384)
 364                                         me->softsendqmax = value / 16;
 365                                 else
 366                                         me->softsendqmax = value;
 367                                 me->hardsendqmax = value * 8;
 368                         }
 369                         me->softsendqmax = tag->getInt("softsendq", me->softsendqmax);
 370                         me->hardsendqmax = tag->getInt("hardsendq", me->hardsendqmax);
 371                         me->recvqmax = tag->getInt("recvq", me->recvqmax);
 372                         me->penaltythreshold = tag->getInt("threshold", me->penaltythreshold);
 373                         me->commandrate = tag->getInt("commandrate", me->commandrate);
 374                         me->fakelag = tag->getBool("fakelag", me->fakelag);
 375                         me->maxlocal = tag->getInt("localmax", me->maxlocal);
 376                         me->maxglobal = tag->getInt("globalmax", me->maxglobal);
 377                         me->maxchans = tag->getInt("maxchans", me->maxchans);
 378                         me->maxconnwarn = tag->getBool("maxconnwarn", me->maxconnwarn);
 379                         me->limit = tag->getInt("limit", me->limit);
 380
 381                         ClassMap::iterator oldMask = oldBlocksByMask.find(typeMask);
 382                         if (oldMask != oldBlocksByMask.end())
 383                         {
 384                                 ConnectClass* old = oldMask->second;
 385                                 oldBlocksByMask.erase(oldMask);
 386                                 old->Update(me);
 387                                 delete me;
 388                                 me = old;
 389                         }
 390                         Classes[i] = me;
 391                 }
 392         }
 393 }
 394
 395 /** Represents a deprecated configuration tag.
 396  */
 397 struct Deprecated
 398 {
 399         /** Tag name
 400          */
 401         const char* tag;
 402         /** Tag value
 403          */
 404         const char* value;
 405         /** Reason for deprecation
 406          */
 407         const char* reason;
 408 };
 409
 410 static const Deprecated ChangedConfig[] = {
 411         {"options", "hidelinks",                "has been moved to <security:hidelinks> as of 1.2a3"},
 412         {"options", "hidewhois",                "has been moved to <security:hidewhois> as of 1.2a3"},
 413         {"options", "userstats",                "has been moved to <security:userstats> as of 1.2a3"},
 414         {"options", "customversion",    "has been moved to <security:customversion> as of 1.2a3"},
 415         {"options", "hidesplits",               "has been moved to <security:hidesplits> as of 1.2a3"},
 416         {"options", "hidebans",         "has been moved to <security:hidebans> as of 1.2a3"},
 417         {"options", "hidekills",                "has been moved to <security:hidekills> as of 1.2a3"},
 418         {"options", "operspywhois",             "has been moved to <security:operspywhois> as of 1.2a3"},
 419         {"options", "announceinvites",  "has been moved to <security:announceinvites> as of 1.2a3"},
 420         {"options", "hidemodes",                "has been moved to <security:hidemodes> as of 1.2a3"},
 421         {"options", "maxtargets",               "has been moved to <security:maxtargets> as of 1.2a3"},
 422         {"options",     "nouserdns",            "has been moved to <performance:nouserdns> as of 1.2a3"},
 423         {"options",     "maxwho",               "has been moved to <performance:maxwho> as of 1.2a3"},
 424         {"options",     "softlimit",            "has been moved to <performance:softlimit> as of 1.2a3"},
 425         {"options", "somaxconn",                "has been moved to <performance:somaxconn> as of 1.2a3"},
 426         {"options", "netbuffersize",    "has been moved to <performance:netbuffersize> as of 1.2a3"},
 427         {"options", "maxwho",           "has been moved to <performance:maxwho> as of 1.2a3"},
 428         {"options",     "loglevel",             "1.2 does not use the loglevel value. Please define <log> tags instead."},
 429         {"die",     "value",            "you need to reread your config"},
 430 };
 431
 432 void ServerConfig::Fill()
 433 {
 434         ConfigTag* options = ConfValue("options");
 435         ConfigTag* security = ConfValue("security");
 436         if (sid.empty())
 437         {
 438                 ServerName = ConfValue("server")->getString("name");
 439                 sid = ConfValue("server")->getString("id");
 440                 ValidHost(ServerName, "<server:name>");
 441                 if (!sid.empty() && !ServerInstance->IsSID(sid))
 442                         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.");
 443         }
 444         else
 445         {
 446                 if (ServerName != ConfValue("server")->getString("name"))
 447                         throw CoreException("You must restart to change the server name or SID");
 448                 std::string nsid = ConfValue("server")->getString("id");
 449                 if (!nsid.empty() && nsid != sid)
 450                         throw CoreException("You must restart to change the server name or SID");
 451         }
 452         diepass = ConfValue("power")->getString("diepass");
 453         restartpass = ConfValue("power")->getString("restartpass");
 454         powerhash = ConfValue("power")->getString("hash");
 455         PrefixQuit = options->getString("prefixquit");
 456         SuffixQuit = options->getString("suffixquit");
 457         FixedQuit = options->getString("fixedquit");
 458         PrefixPart = options->getString("prefixpart");
 459         SuffixPart = options->getString("suffixpart");
 460         FixedPart = options->getString("fixedpart");
 461         SoftLimit = ConfValue("performance")->getInt("softlimit", ServerInstance->SE->GetMaxFds());
 462         MaxConn = ConfValue("performance")->getInt("somaxconn", SOMAXCONN);
 463         MoronBanner = options->getString("moronbanner", "You're banned!");
 464         ServerDesc = ConfValue("server")->getString("description", "Configure Me");
 465         Network = ConfValue("server")->getString("network", "Network");
 466         AdminName = ConfValue("admin")->getString("name", "");
 467         AdminEmail = ConfValue("admin")->getString("email", "null@example.com");
 468         AdminNick = ConfValue("admin")->getString("nick", "admin");
 469         ModPath = ConfValue("path")->getString("moduledir", MOD_PATH);
 470         NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240);
 471         dns_timeout = ConfValue("dns")->getInt("timeout", 5);
 472         DisabledCommands = ConfValue("disabled")->getString("commands", "");
 473         DisabledDontExist = ConfValue("disabled")->getBool("fakenonexistant");
 474         UserStats = security->getString("userstats");
 475         CustomVersion = security->getString("customversion", Network + " IRCd");
 476         HideSplits = security->getBool("hidesplits");
 477         HideBans = security->getBool("hidebans");
 478         HideWhoisServer = security->getString("hidewhois");
 479         HideKillsServer = security->getString("hidekills");
 480         RestrictBannedUsers = security->getBool("restrictbannedusers", true);
 481         GenericOper = security->getBool("genericoper");
 482         NoUserDns = ConfValue("performance")->getBool("nouserdns");
 483         SyntaxHints = options->getBool("syntaxhints");
 484         CycleHosts = options->getBool("cyclehosts");
 485         CycleHostsFromUser = options->getBool("cyclehostsfromuser");
 486         UndernetMsgPrefix = options->getBool("ircumsgprefix");
 487         FullHostInTopic = options->getBool("hostintopic");
 488         MaxTargets = security->getInt("maxtargets", 20);
 489         DefaultModes = options->getString("defaultmodes", "nt");
 490         PID = ConfValue("pid")->getString("file");
 491         WhoWasGroupSize = ConfValue("whowas")->getInt("groupsize");
 492         WhoWasMaxGroups = ConfValue("whowas")->getInt("maxgroups");
 493         WhoWasMaxKeep = ServerInstance->Duration(ConfValue("whowas")->getString("maxkeep"));
 494         MaxChans = ConfValue("channels")->getInt("users", 20);
 495         OperMaxChans = ConfValue("channels")->getInt("opers", 60);
 496         c_ipv4_range = ConfValue("cidr")->getInt("ipv4clone", 32);
 497         c_ipv6_range = ConfValue("cidr")->getInt("ipv6clone", 128);
 498         Limits.NickMax = ConfValue("limits")->getInt("maxnick", 32);
 499         Limits.ChanMax = ConfValue("limits")->getInt("maxchan", 64);
 500         Limits.MaxModes = ConfValue("limits")->getInt("maxmodes", 20);
 501         Limits.IdentMax = ConfValue("limits")->getInt("maxident", 11);
 502         Limits.MaxQuit = ConfValue("limits")->getInt("maxquit", 255);
 503         Limits.MaxTopic = ConfValue("limits")->getInt("maxtopic", 307);
 504         Limits.MaxKick = ConfValue("limits")->getInt("maxkick", 255);
 505         Limits.MaxGecos = ConfValue("limits")->getInt("maxgecos", 128);
 506         Limits.MaxAway = ConfValue("limits")->getInt("maxaway", 200);
 507         InvBypassModes = options->getBool("invitebypassmodes", true);
 508
 509         range(SoftLimit, 10, ServerInstance->SE->GetMaxFds(), ServerInstance->SE->GetMaxFds(), "<performance:softlimit>");
 510         range(MaxConn, 0, SOMAXCONN, SOMAXCONN, "<performance:somaxconn>");
 511         range(MaxTargets, 1, 31, 20, "<security:maxtargets>");
 512         range(NetBufferSize, 1024, 65534, 10240, "<performance:netbuffersize>");
 513         range(WhoWasGroupSize, 0, 10000, 10, "<whowas:groupsize>");
 514         range(WhoWasMaxGroups, 0, 1000000, 10240, "<whowas:maxgroups>");
 515         range(WhoWasMaxKeep, 3600, INT_MAX, 3600, "<whowas:maxkeep>");
 516
 517         ValidIP(DNSServer, "<dns:server>");
 518
 519         std::string defbind = options->getString("defaultbind");
 520         if (assign(defbind) == "ipv4")
 521         {
 522                 WildcardIPv6 = false;
 523         }
 524         else if (assign(defbind) == "ipv6")
 525         {
 526                 WildcardIPv6 = true;
 527         }
 528         else
 529         {
 530                 WildcardIPv6 = true;
 531                 int socktest = socket(AF_INET6, SOCK_STREAM, 0);
 532                 if (socktest < 0)
 533                         WildcardIPv6 = false;
 534                 else
 535                         ServerInstance->SE->Close(socktest);
 536         }
 537         ConfigTagList tags = ConfTags("uline");
 538         for(ConfigIter i = tags.first; i != tags.second; ++i)
 539         {
 540                 ConfigTag* tag = i->second;
 541                 std::string server;
 542                 if (!tag->readString("server", server))
 543                         throw CoreException("<uline> tag missing server at " + tag->getTagLocation());
 544                 ulines[assign(server)] = tag->getBool("silent");
 545         }
 546
 547         tags = ConfTags("banlist");
 548         for(ConfigIter i = tags.first; i != tags.second; ++i)
 549         {
 550                 ConfigTag* tag = i->second;
 551                 std::string chan;
 552                 if (!tag->readString("chan", chan))
 553                         throw CoreException("<banlist> tag missing chan at " + tag->getTagLocation());
 554                 maxbans[chan] = tag->getInt("limit");
 555         }
 556
 557         ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
 558         ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
 559         ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
 560         ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));
 561
 562         memset(DisabledUModes, 0, sizeof(DisabledUModes));
 563         for (const unsigned char* p = (const unsigned char*)ConfValue("disabled")->getString("usermodes").c_str(); *p; ++p)
 564         {
 565                 if (*p < 'A' || *p > ('A' + 64)) throw CoreException(std::string("Invalid usermode ")+(char)*p+" was found.");
 566                 DisabledUModes[*p - 'A'] = 1;
 567         }
 568
 569         memset(DisabledCModes, 0, sizeof(DisabledCModes));
 570         for (const unsigned char* p = (const unsigned char*)ConfValue("disabled")->getString("chanmodes").c_str(); *p; ++p)
 571         {
 572                 if (*p < 'A' || *p > ('A' + 64)) throw CoreException(std::string("Invalid chanmode ")+(char)*p+" was found.");
 573                 DisabledCModes[*p - 'A'] = 1;
 574         }
 575
 576         memset(HideModeLists, 0, sizeof(HideModeLists));
 577         for (const unsigned char* p = (const unsigned char*)ConfValue("security")->getString("hidemodes").c_str(); *p; ++p)
 578                 HideModeLists[*p] = true;
 579
 580         std::string v = security->getString("announceinvites");
 581
 582         if (v == "ops")
 583                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_OPS;
 584         else if (v == "all")
 585                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_ALL;
 586         else if (v == "dynamic")
 587                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_DYNAMIC;
 588         else
 589                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_NONE;
 590
 591         v = security->getString("operspywhois");
 592         if (v == "splitmsg")
 593                 OperSpyWhois = SPYWHOIS_SPLITMSG;
 594         else if (v == "on" || v == "yes")
 595                 OperSpyWhois = SPYWHOIS_SINGLEMSG;
 596         else
 597                 OperSpyWhois = SPYWHOIS_NONE;
 598
 599         Limits.Finalise();
 600 }
 601
 602 // WARNING: it is not safe to use most of the codebase in this function, as it
 603 // will run in the config reader thread
 604 void ServerConfig::Read()
 605 {
 606         /* Load and parse the config file, if there are any errors then explode */
 607
 608         ParseStack stack(this);
 609         try
 610         {
 611                 valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
 612         }
 613         catch (CoreException& err)
 614         {
 615                 valid = false;
 616                 errstr << err.GetReason();
 617         }
 618         if (valid)
 619         {
 620                 DNSServer = ConfValue("dns")->getString("server");
 621                 FindDNS(DNSServer);
 622         }
 623 }
 624
 625 void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
 626 {
 627         valid = true;
 628         if (old)
 629         {
 630                 /*
 631                  * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
 632                  */
 633                 this->ServerName = old->ServerName;
 634                 this->sid = old->sid;
 635                 this->cmdline = old->cmdline;
 636         }
 637
 638         /* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
 639         try
 640         {
 641                 for (int Index = 0; Index * sizeof(Deprecated) < sizeof(ChangedConfig); Index++)
 642                 {
 643                         std::string dummy;
 644                         if (ConfValue(ChangedConfig[Index].tag)->readString(ChangedConfig[Index].value, dummy, true))
 645                                 errstr << "Your configuration contains a deprecated value: <"
 646                                         << ChangedConfig[Index].tag << ":" << ChangedConfig[Index].value << "> - " << ChangedConfig[Index].reason
 647                                         << " (at " << ConfValue(ChangedConfig[Index].tag)->getTagLocation() << ")\n";
 648                 }
 649
 650                 Fill();
 651
 652                 // Handle special items
 653                 CrossCheckOperClassType();
 654                 CrossCheckConnectBlocks(old);
 655         }
 656         catch (CoreException &ce)
 657         {
 658                 errstr << ce.GetReason();
 659         }
 660
 661         // Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
 662         valid = errstr.str().empty();
 663
 664         // write once here, to try it out and make sure its ok
 665         if (valid)
 666                 ServerInstance->WritePID(this->PID);
 667
 668         if (old)
 669         {
 670                 // On first run, ports are bound later on
 671                 FailedPortList pl;
 672                 ServerInstance->BindPorts(pl);
 673                 if (pl.size())
 674                 {
 675                         errstr << "Not all your client ports could be bound.\nThe following port(s) failed to bind:\n";
 676
 677                         int j = 1;
 678                         for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 679                         {
 680                                 char buf[MAXBUF];
 681                                 snprintf(buf, MAXBUF, "%d.   Address: %s   Reason: %s\n", j, i->first.empty() ? "<all>" : i->first.c_str(), i->second.c_str());
 682                                 errstr << buf;
 683                         }
 684                 }
 685         }
 686
 687         User* user = useruid.empty() ? NULL : ServerInstance->FindNick(useruid);
 688
 689         if (!valid)
 690                 ServerInstance->Logs->Log("CONFIG",DEFAULT, "There were errors in your configuration file:");
 691
 692         while (errstr.good())
 693         {
 694                 std::string line;
 695                 getline(errstr, line, '\n');
 696                 if (line.empty())
 697                         continue;
 698                 // On startup, print out to console (still attached at this point)
 699                 if (!old)
 700                         printf("%s\n", line.c_str());
 701                 // If a user is rehashing, tell them directly
 702                 if (user)
 703                         user->SendText(":%s NOTICE %s :*** %s", ServerInstance->Config->ServerName.c_str(), user->nick.c_str(), line.c_str());
 704                 // Also tell opers
 705                 ServerInstance->SNO->WriteGlobalSno('a', line);
 706         }
 707
 708         errstr.clear();
 709         errstr.str(std::string());
 710
 711         /* No old configuration -> initial boot, nothing more to do here */
 712         if (!old)
 713         {
 714                 if (!valid)
 715                 {
 716                         ServerInstance->Exit(EXIT_STATUS_CONFIG);
 717                 }
 718
 719                 return;
 720         }
 721
 722         // If there were errors processing configuration, don't touch modules.
 723         if (!valid)
 724                 return;
 725
 726         ApplyModules(user);
 727
 728         if (user)
 729                 user->SendText(":%s NOTICE %s :*** Successfully rehashed server.",
 730                         ServerInstance->Config->ServerName.c_str(), user->nick.c_str());
 731         ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
 732 }
 733
 734 void ServerConfig::ApplyModules(User* user)
 735 {
 736         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 737         if (whowas)
 738                 WhowasRequest(NULL, whowas, WhowasRequest::WHOWAS_PRUNE).Send();
 739
 740         const std::vector<std::string> v = ServerInstance->Modules->GetAllModuleNames(0);
 741         std::vector<std::string> added_modules;
 742         std::set<std::string> removed_modules(v.begin(), v.end());
 743
 744         ConfigTagList tags = ConfTags("module");
 745         for(ConfigIter i = tags.first; i != tags.second; ++i)
 746         {
 747                 ConfigTag* tag = i->second;
 748                 std::string name;
 749                 if (tag->readString("name", name))
 750                 {
 751                         // if this module is already loaded, the erase will succeed, so we need do nothing
 752                         // otherwise, we need to add the module (which will be done later)
 753                         if (removed_modules.erase(name) == 0)
 754                                 added_modules.push_back(name);
 755                 }
 756         }
 757
 758         if (ConfValue("options")->getBool("allowhalfop") && removed_modules.erase("m_halfop.so") == 0)
 759                 added_modules.push_back("m_halfop.so");
 760
 761         for (std::set<std::string>::iterator removing = removed_modules.begin(); removing != removed_modules.end(); removing++)
 762         {
 763                 // Don't remove cmd_*.so, just remove m_*.so
 764                 if (removing->c_str()[0] == 'c')
 765                         continue;
 766                 Module* m = ServerInstance->Modules->Find(*removing);
 767                 if (m && ServerInstance->Modules->Unload(m))
 768                 {
 769                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s",removing->c_str());
 770
 771                         if (user)
 772                                 user->WriteNumeric(RPL_UNLOADEDMODULE, "%s %s :Module %s successfully unloaded.",user->nick.c_str(), removing->c_str(), removing->c_str());
 773                         else
 774                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully unloaded.", removing->c_str());
 775                 }
 776                 else
 777                 {
 778                         if (user)
 779                                 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());
 780                         else
 781                                  ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload module %s: %s", removing->c_str(), ServerInstance->Modules->LastError().c_str());
 782                 }
 783         }
 784
 785         for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 786         {
 787                 if (ServerInstance->Modules->Load(adding->c_str()))
 788                 {
 789                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
 790                         if (user)
 791                                 user->WriteNumeric(RPL_LOADEDMODULE, "%s %s :Module %s successfully loaded.",user->nick.c_str(), adding->c_str(), adding->c_str());
 792                         else
 793                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully loaded.", adding->c_str());
 794                 }
 795                 else
 796                 {
 797                         if (user)
 798                                 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());
 799                         else
 800                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
 801                 }
 802         }
 803 }
 804
 805 bool ServerConfig::StartsWithWindowsDriveLetter(const std::string &path)
 806 {
 807         return (path.length() > 2 && isalpha(path[0]) && path[1] == ':');
 808 }
 809
 810 ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 811 {
 812         ConfigTagList found = config_data.equal_range(tag);
 813         if (found.first == found.second)
 814                 return NULL;
 815         ConfigTag* rv = found.first->second;
 816         found.first++;
 817         if (found.first != found.second)
 818                 ServerInstance->Logs->Log("CONFIG",DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
 819                         "(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
 820         return rv;
 821 }
 822
 823 ConfigTagList ServerConfig::ConfTags(const std::string& tag)
 824 {
 825         return config_data.equal_range(tag);
 826 }
 827
 828 bool ServerConfig::FileExists(const char* file)
 829 {
 830         struct stat sb;
 831         if (stat(file, &sb) == -1)
 832                 return false;
 833
 834         if ((sb.st_mode & S_IFDIR) > 0)
 835                 return false;
 836
 837         FILE *input = fopen(file, "r");
 838         if (input == NULL)
 839                 return false;
 840         else
 841         {
 842                 fclose(input);
 843                 return true;
 844         }
 845 }
 846
 847 const char* ServerConfig::CleanFilename(const char* name)
 848 {
 849         const char* p = name + strlen(name);
 850         while ((p != name) && (*p != '/') && (*p != '\\')) p--;
 851         return (p != name ? ++p : p);
 852 }
 853
 854 std::string ServerConfig::GetSID()
 855 {
 856         return sid;
 857 }
 858
 859 void ConfigReaderThread::Run()
 860 {
 861         Config->Read();
 862         done = true;
 863 }
 864
 865 void ConfigReaderThread::Finish()
 866 {
 867         ServerConfig* old = ServerInstance->Config;
 868         ServerInstance->Logs->Log("CONFIG",DEBUG,"Switching to new configuration...");
 869         ServerInstance->Config = this->Config;
 870         Config->Apply(old, TheUserUID);
 871
 872         if (Config->valid)
 873         {
 874                 /*
 875                  * Apply the changed configuration from the rehash.
 876                  *
 877                  * XXX: The order of these is IMPORTANT, do not reorder them without testing
 878                  * thoroughly!!!
 879                  */
 880                 ServerInstance->XLines->CheckELines();
 881                 ServerInstance->XLines->CheckELines();
 882                 ServerInstance->XLines->ApplyLines();
 883                 ServerInstance->Res->Rehash();
 884                 ServerInstance->ResetMaxBans();
 885                 Config->ApplyDisabledCommands(Config->DisabledCommands);
 886                 User* user = ServerInstance->FindNick(TheUserUID);
 887                 FOREACH_MOD(I_OnRehash, OnRehash(user));
 888                 ServerInstance->BuildISupport();
 889
 890                 ServerInstance->Logs->CloseLogs();
 891                 ServerInstance->Logs->OpenFileLogs();
 892
 893                 if (Config->RawLog && !old->RawLog)
 894                         ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 895
 896                 Config = old;
 897         }
 898         else
 899         {
 900                 // whoops, abort!
 901                 ServerInstance->Config = old;
 902         }
 903 }