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         {"bind",    "transport",                "has been moved to <bind:ssl> as of 2.0a1"},
 442         {"link",    "transport",                "has been moved to <link:ssl> as of 2.0a1"},
 443
 444 };
 445
 446 void ServerConfig::Fill()
 447 {
 448         ConfigTag* options = ConfValue("options");
 449         ConfigTag* security = ConfValue("security");
 450         if (sid.empty())
 451         {
 452                 ServerName = ConfValue("server")->getString("name");
 453                 sid = ConfValue("server")->getString("id");
 454                 ValidHost(ServerName, "<server:name>");
 455                 if (!sid.empty() && !ServerInstance->IsSID(sid))
 456                         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.");
 457         }
 458         else
 459         {
 460                 if (ServerName != ConfValue("server")->getString("name"))
 461                         throw CoreException("You must restart to change the server name or SID");
 462                 std::string nsid = ConfValue("server")->getString("id");
 463                 if (!nsid.empty() && nsid != sid)
 464                         throw CoreException("You must restart to change the server name or SID");
 465         }
 466         diepass = ConfValue("power")->getString("diepass");
 467         restartpass = ConfValue("power")->getString("restartpass");
 468         powerhash = ConfValue("power")->getString("hash");
 469         PrefixQuit = options->getString("prefixquit");
 470         SuffixQuit = options->getString("suffixquit");
 471         FixedQuit = options->getString("fixedquit");
 472         PrefixPart = options->getString("prefixpart");
 473         SuffixPart = options->getString("suffixpart");
 474         FixedPart = options->getString("fixedpart");
 475         SoftLimit = ConfValue("performance")->getInt("softlimit", ServerInstance->SE->GetMaxFds());
 476         MaxConn = ConfValue("performance")->getInt("somaxconn", SOMAXCONN);
 477         MoronBanner = options->getString("moronbanner", "You're banned!");
 478         ServerDesc = ConfValue("server")->getString("description", "Configure Me");
 479         Network = ConfValue("server")->getString("network", "Network");
 480         AdminName = ConfValue("admin")->getString("name", "");
 481         AdminEmail = ConfValue("admin")->getString("email", "null@example.com");
 482         AdminNick = ConfValue("admin")->getString("nick", "admin");
 483         ModPath = ConfValue("path")->getString("moduledir", MOD_PATH);
 484         NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240);
 485         dns_timeout = ConfValue("dns")->getInt("timeout", 5);
 486         DisabledCommands = ConfValue("disabled")->getString("commands", "");
 487         DisabledDontExist = ConfValue("disabled")->getBool("fakenonexistant");
 488         UserStats = security->getString("userstats");
 489         CustomVersion = security->getString("customversion", Network + " IRCd");
 490         HideSplits = security->getBool("hidesplits");
 491         HideBans = security->getBool("hidebans");
 492         HideWhoisServer = security->getString("hidewhois");
 493         HideKillsServer = security->getString("hidekills");
 494         RestrictBannedUsers = security->getBool("restrictbannedusers", true);
 495         GenericOper = security->getBool("genericoper");
 496         NoUserDns = ConfValue("performance")->getBool("nouserdns");
 497         SyntaxHints = options->getBool("syntaxhints");
 498         CycleHosts = options->getBool("cyclehosts");
 499         CycleHostsFromUser = options->getBool("cyclehostsfromuser");
 500         UndernetMsgPrefix = options->getBool("ircumsgprefix");
 501         FullHostInTopic = options->getBool("hostintopic");
 502         MaxTargets = security->getInt("maxtargets", 20);
 503         DefaultModes = options->getString("defaultmodes", "nt");
 504         PID = ConfValue("pid")->getString("file");
 505         WhoWasGroupSize = ConfValue("whowas")->getInt("groupsize");
 506         WhoWasMaxGroups = ConfValue("whowas")->getInt("maxgroups");
 507         WhoWasMaxKeep = ServerInstance->Duration(ConfValue("whowas")->getString("maxkeep"));
 508         MaxChans = ConfValue("channels")->getInt("users", 20);
 509         OperMaxChans = ConfValue("channels")->getInt("opers", 60);
 510         c_ipv4_range = ConfValue("cidr")->getInt("ipv4clone", 32);
 511         c_ipv6_range = ConfValue("cidr")->getInt("ipv6clone", 128);
 512         Limits.NickMax = ConfValue("limits")->getInt("maxnick", 32);
 513         Limits.ChanMax = ConfValue("limits")->getInt("maxchan", 64);
 514         Limits.MaxModes = ConfValue("limits")->getInt("maxmodes", 20);
 515         Limits.IdentMax = ConfValue("limits")->getInt("maxident", 11);
 516         Limits.MaxQuit = ConfValue("limits")->getInt("maxquit", 255);
 517         Limits.MaxTopic = ConfValue("limits")->getInt("maxtopic", 307);
 518         Limits.MaxKick = ConfValue("limits")->getInt("maxkick", 255);
 519         Limits.MaxGecos = ConfValue("limits")->getInt("maxgecos", 128);
 520         Limits.MaxAway = ConfValue("limits")->getInt("maxaway", 200);
 521         InvBypassModes = options->getBool("invitebypassmodes", true);
 522         NoSnoticeStack = options->getBool("nosnoticestack", false);
 523
 524         range(SoftLimit, 10, ServerInstance->SE->GetMaxFds(), ServerInstance->SE->GetMaxFds(), "<performance:softlimit>");
 525         range(MaxConn, 0, SOMAXCONN, SOMAXCONN, "<performance:somaxconn>");
 526         range(MaxTargets, 1, 31, 20, "<security:maxtargets>");
 527         range(NetBufferSize, 1024, 65534, 10240, "<performance:netbuffersize>");
 528         range(WhoWasGroupSize, 0, 10000, 10, "<whowas:groupsize>");
 529         range(WhoWasMaxGroups, 0, 1000000, 10240, "<whowas:maxgroups>");
 530         range(WhoWasMaxKeep, 3600, INT_MAX, 3600, "<whowas:maxkeep>");
 531
 532         ValidIP(DNSServer, "<dns:server>");
 533
 534         std::string defbind = options->getString("defaultbind");
 535         if (assign(defbind) == "ipv4")
 536         {
 537                 WildcardIPv6 = false;
 538         }
 539         else if (assign(defbind) == "ipv6")
 540         {
 541                 WildcardIPv6 = true;
 542         }
 543         else
 544         {
 545                 WildcardIPv6 = true;
 546                 int socktest = socket(AF_INET6, SOCK_STREAM, 0);
 547                 if (socktest < 0)
 548                         WildcardIPv6 = false;
 549                 else
 550                         ServerInstance->SE->Close(socktest);
 551         }
 552         ConfigTagList tags = ConfTags("uline");
 553         for(ConfigIter i = tags.first; i != tags.second; ++i)
 554         {
 555                 ConfigTag* tag = i->second;
 556                 std::string server;
 557                 if (!tag->readString("server", server))
 558                         throw CoreException("<uline> tag missing server at " + tag->getTagLocation());
 559                 ulines[assign(server)] = tag->getBool("silent");
 560         }
 561
 562         tags = ConfTags("banlist");
 563         for(ConfigIter i = tags.first; i != tags.second; ++i)
 564         {
 565                 ConfigTag* tag = i->second;
 566                 std::string chan;
 567                 if (!tag->readString("chan", chan))
 568                         throw CoreException("<banlist> tag missing chan at " + tag->getTagLocation());
 569                 maxbans[chan] = tag->getInt("limit");
 570         }
 571
 572         ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
 573         ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
 574         ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
 575         ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));
 576
 577         memset(DisabledUModes, 0, sizeof(DisabledUModes));
 578         for (const unsigned char* p = (const unsigned char*)ConfValue("disabled")->getString("usermodes").c_str(); *p; ++p)
 579         {
 580                 if (*p < 'A' || *p > ('A' + 64)) throw CoreException(std::string("Invalid usermode ")+(char)*p+" was found.");
 581                 DisabledUModes[*p - 'A'] = 1;
 582         }
 583
 584         memset(DisabledCModes, 0, sizeof(DisabledCModes));
 585         for (const unsigned char* p = (const unsigned char*)ConfValue("disabled")->getString("chanmodes").c_str(); *p; ++p)
 586         {
 587                 if (*p < 'A' || *p > ('A' + 64)) throw CoreException(std::string("Invalid chanmode ")+(char)*p+" was found.");
 588                 DisabledCModes[*p - 'A'] = 1;
 589         }
 590
 591         memset(HideModeLists, 0, sizeof(HideModeLists));
 592         for (const unsigned char* p = (const unsigned char*)ConfValue("security")->getString("hidemodes").c_str(); *p; ++p)
 593                 HideModeLists[*p] = true;
 594
 595         std::string v = security->getString("announceinvites");
 596
 597         if (v == "ops")
 598                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_OPS;
 599         else if (v == "all")
 600                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_ALL;
 601         else if (v == "dynamic")
 602                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_DYNAMIC;
 603         else
 604                 AnnounceInvites = ServerConfig::INVITE_ANNOUNCE_NONE;
 605
 606         v = security->getString("operspywhois");
 607         if (v == "splitmsg")
 608                 OperSpyWhois = SPYWHOIS_SPLITMSG;
 609         else if (v == "on" || v == "yes")
 610                 OperSpyWhois = SPYWHOIS_SINGLEMSG;
 611         else
 612                 OperSpyWhois = SPYWHOIS_NONE;
 613
 614         Limits.Finalise();
 615 }
 616
 617 // WARNING: it is not safe to use most of the codebase in this function, as it
 618 // will run in the config reader thread
 619 void ServerConfig::Read()
 620 {
 621         /* Load and parse the config file, if there are any errors then explode */
 622
 623         ParseStack stack(this);
 624         try
 625         {
 626                 valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
 627         }
 628         catch (CoreException& err)
 629         {
 630                 valid = false;
 631                 errstr << err.GetReason();
 632         }
 633         if (valid)
 634         {
 635                 DNSServer = ConfValue("dns")->getString("server");
 636                 FindDNS(DNSServer);
 637         }
 638 }
 639
 640 void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
 641 {
 642         valid = true;
 643         if (old)
 644         {
 645                 /*
 646                  * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
 647                  */
 648                 this->ServerName = old->ServerName;
 649                 this->sid = old->sid;
 650                 this->cmdline = old->cmdline;
 651         }
 652
 653         /* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
 654         try
 655         {
 656                 for (int Index = 0; Index * sizeof(Deprecated) < sizeof(ChangedConfig); Index++)
 657                 {
 658                         std::string dummy;
 659                         if (ConfValue(ChangedConfig[Index].tag)->readString(ChangedConfig[Index].value, dummy, true))
 660                                 errstr << "Your configuration contains a deprecated value: <"
 661                                         << ChangedConfig[Index].tag << ":" << ChangedConfig[Index].value << "> - " << ChangedConfig[Index].reason
 662                                         << " (at " << ConfValue(ChangedConfig[Index].tag)->getTagLocation() << ")\n";
 663                 }
 664
 665                 Fill();
 666
 667                 // Handle special items
 668                 CrossCheckOperClassType();
 669                 CrossCheckConnectBlocks(old);
 670         }
 671         catch (CoreException &ce)
 672         {
 673                 errstr << ce.GetReason();
 674         }
 675
 676         // Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
 677         valid = errstr.str().empty();
 678
 679         // write once here, to try it out and make sure its ok
 680         if (valid)
 681                 ServerInstance->WritePID(this->PID);
 682
 683         if (old)
 684         {
 685                 // On first run, ports are bound later on
 686                 FailedPortList pl;
 687                 ServerInstance->BindPorts(pl);
 688                 if (pl.size())
 689                 {
 690                         errstr << "Not all your client ports could be bound.\nThe following port(s) failed to bind:\n";
 691
 692                         int j = 1;
 693                         for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 694                         {
 695                                 char buf[MAXBUF];
 696                                 snprintf(buf, MAXBUF, "%d.   Address: %s   Reason: %s\n", j, i->first.empty() ? "<all>" : i->first.c_str(), i->second.c_str());
 697                                 errstr << buf;
 698                         }
 699                 }
 700         }
 701
 702         User* user = useruid.empty() ? NULL : ServerInstance->FindNick(useruid);
 703
 704         if (!valid)
 705                 ServerInstance->Logs->Log("CONFIG",DEFAULT, "There were errors in your configuration file:");
 706
 707         while (errstr.good())
 708         {
 709                 std::string line;
 710                 getline(errstr, line, '\n');
 711                 if (line.empty())
 712                         continue;
 713                 // On startup, print out to console (still attached at this point)
 714                 if (!old)
 715                         printf("%s\n", line.c_str());
 716                 // If a user is rehashing, tell them directly
 717                 if (user)
 718                         user->SendText(":%s NOTICE %s :*** %s", ServerInstance->Config->ServerName.c_str(), user->nick.c_str(), line.c_str());
 719                 // Also tell opers
 720                 ServerInstance->SNO->WriteGlobalSno('a', line);
 721         }
 722
 723         errstr.clear();
 724         errstr.str(std::string());
 725
 726         /* No old configuration -> initial boot, nothing more to do here */
 727         if (!old)
 728         {
 729                 if (!valid)
 730                 {
 731                         ServerInstance->Exit(EXIT_STATUS_CONFIG);
 732                 }
 733
 734                 return;
 735         }
 736
 737         // If there were errors processing configuration, don't touch modules.
 738         if (!valid)
 739                 return;
 740
 741         ApplyModules(user);
 742
 743         if (user)
 744                 user->SendText(":%s NOTICE %s :*** Successfully rehashed server.",
 745                         ServerInstance->Config->ServerName.c_str(), user->nick.c_str());
 746         ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
 747 }
 748
 749 void ServerConfig::ApplyModules(User* user)
 750 {
 751         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 752         if (whowas)
 753                 WhowasRequest(NULL, whowas, WhowasRequest::WHOWAS_PRUNE).Send();
 754
 755         const std::vector<std::string> v = ServerInstance->Modules->GetAllModuleNames(0);
 756         std::vector<std::string> added_modules;
 757         std::set<std::string> removed_modules(v.begin(), v.end());
 758
 759         ConfigTagList tags = ConfTags("module");
 760         for(ConfigIter i = tags.first; i != tags.second; ++i)
 761         {
 762                 ConfigTag* tag = i->second;
 763                 std::string name;
 764                 if (tag->readString("name", name))
 765                 {
 766                         // if this module is already loaded, the erase will succeed, so we need do nothing
 767                         // otherwise, we need to add the module (which will be done later)
 768                         if (removed_modules.erase(name) == 0)
 769                                 added_modules.push_back(name);
 770                 }
 771         }
 772
 773         if (ConfValue("options")->getBool("allowhalfop") && removed_modules.erase("m_halfop.so") == 0)
 774                 added_modules.push_back("m_halfop.so");
 775
 776         for (std::set<std::string>::iterator removing = removed_modules.begin(); removing != removed_modules.end(); removing++)
 777         {
 778                 // Don't remove cmd_*.so, just remove m_*.so
 779                 if (removing->c_str()[0] == 'c')
 780                         continue;
 781                 Module* m = ServerInstance->Modules->Find(*removing);
 782                 if (m && ServerInstance->Modules->Unload(m))
 783                 {
 784                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s",removing->c_str());
 785
 786                         if (user)
 787                                 user->WriteNumeric(RPL_UNLOADEDMODULE, "%s %s :Module %s successfully unloaded.",user->nick.c_str(), removing->c_str(), removing->c_str());
 788                         else
 789                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully unloaded.", removing->c_str());
 790                 }
 791                 else
 792                 {
 793                         if (user)
 794                                 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());
 795                         else
 796                                  ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload module %s: %s", removing->c_str(), ServerInstance->Modules->LastError().c_str());
 797                 }
 798         }
 799
 800         for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 801         {
 802                 if (ServerInstance->Modules->Load(adding->c_str()))
 803                 {
 804                         ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
 805                         if (user)
 806                                 user->WriteNumeric(RPL_LOADEDMODULE, "%s %s :Module %s successfully loaded.",user->nick.c_str(), adding->c_str(), adding->c_str());
 807                         else
 808                                 ServerInstance->SNO->WriteGlobalSno('a', "Module %s successfully loaded.", adding->c_str());
 809                 }
 810                 else
 811                 {
 812                         if (user)
 813                                 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());
 814                         else
 815                                 ServerInstance->SNO->WriteGlobalSno('a', "Failed to load module %s: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
 816                 }
 817         }
 818 }
 819
 820 bool ServerConfig::StartsWithWindowsDriveLetter(const std::string &path)
 821 {
 822         return (path.length() > 2 && isalpha(path[0]) && path[1] == ':');
 823 }
 824
 825 ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 826 {
 827         ConfigTagList found = config_data.equal_range(tag);
 828         if (found.first == found.second)
 829                 return NULL;
 830         ConfigTag* rv = found.first->second;
 831         found.first++;
 832         if (found.first != found.second)
 833                 ServerInstance->Logs->Log("CONFIG",DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
 834                         "(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
 835         return rv;
 836 }
 837
 838 ConfigTagList ServerConfig::ConfTags(const std::string& tag)
 839 {
 840         return config_data.equal_range(tag);
 841 }
 842
 843 bool ServerConfig::FileExists(const char* file)
 844 {
 845         struct stat sb;
 846         if (stat(file, &sb) == -1)
 847                 return false;
 848
 849         if ((sb.st_mode & S_IFDIR) > 0)
 850                 return false;
 851
 852         FILE *input = fopen(file, "r");
 853         if (input == NULL)
 854                 return false;
 855         else
 856         {
 857                 fclose(input);
 858                 return true;
 859         }
 860 }
 861
 862 const char* ServerConfig::CleanFilename(const char* name)
 863 {
 864         const char* p = name + strlen(name);
 865         while ((p != name) && (*p != '/') && (*p != '\\')) p--;
 866         return (p != name ? ++p : p);
 867 }
 868
 869 std::string ServerConfig::GetSID()
 870 {
 871         return sid;
 872 }
 873
 874 void ConfigReaderThread::Run()
 875 {
 876         Config->Read();
 877         done = true;
 878 }
 879
 880 void ConfigReaderThread::Finish()
 881 {
 882         ServerConfig* old = ServerInstance->Config;
 883         ServerInstance->Logs->Log("CONFIG",DEBUG,"Switching to new configuration...");
 884         ServerInstance->Config = this->Config;
 885         Config->Apply(old, TheUserUID);
 886
 887         if (Config->valid)
 888         {
 889                 /*
 890                  * Apply the changed configuration from the rehash.
 891                  *
 892                  * XXX: The order of these is IMPORTANT, do not reorder them without testing
 893                  * thoroughly!!!
 894                  */
 895                 ServerInstance->XLines->CheckELines();
 896                 ServerInstance->XLines->ApplyLines();
 897                 ServerInstance->Res->Rehash();
 898                 ServerInstance->ResetMaxBans();
 899                 Config->ApplyDisabledCommands(Config->DisabledCommands);
 900                 User* user = ServerInstance->FindNick(TheUserUID);
 901                 FOREACH_MOD(I_OnRehash, OnRehash(user));
 902                 ServerInstance->BuildISupport();
 903
 904                 ServerInstance->Logs->CloseLogs();
 905                 ServerInstance->Logs->OpenFileLogs();
 906
 907                 if (Config->RawLog && !old->RawLog)
 908                         ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 909
 910                 Config = old;
 911         }
 912         else
 913         {
 914                 // whoops, abort!
 915                 ServerInstance->Config = old;
 916         }
 917 }