src/inspircd_io.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include "inspircd_config.h"
  20 #include <sys/time.h>
  21 #include <sys/resource.h>
  22 #include <sys/types.h>
  23 #include <string>
  24 #include <unistd.h>
  25 #include <sstream>
  26 #include <iostream>
  27 #include <fstream>
  28 #include "inspircd.h"
  29 #include "inspircd_io.h"
  30 #include "inspstring.h"
  31 #include "helperfuncs.h"
  32 #include "userprocess.h"
  33 #include "xline.h"
  34
  35 extern ServerConfig *Config;
  36 extern InspIRCd* ServerInstance;
  37 extern int openSockfd[MAXSOCKS];
  38 extern time_t TIME;
  39
  40 extern int MODCOUNT;
  41 extern std::vector<Module*> modules;
  42 extern std::vector<ircd_module*> factory;
  43
  44 ServerConfig::ServerConfig()
  45 {
  46         this->ClearStack();
  47         *TempDir = *ServerName = *Network = *ServerDesc = *AdminName = '\0';
  48         *HideWhoisServer = *AdminEmail = *AdminNick = *diepass = *restartpass = '\0';
  49         *CustomVersion = *motd = *rules = *PrefixQuit = *DieValue = *DNSServer = '\0';
  50         *OperOnlyStats = *ModPath = *MyExecutable = *DisabledCommands = *PID = '\0';
  51         log_file = NULL;
  52         nofork = HideBans = HideSplits = unlimitcore = false;
  53         AllowHalfop = true;
  54         dns_timeout = DieDelay = 5;
  55         MaxTargets = 20;
  56         NetBufferSize = 10240;
  57         SoftLimit = MAXCLIENTS;
  58         MaxConn = SOMAXCONN;
  59         MaxWhoResults = 100;
  60         debugging = 0;
  61         LogLevel = DEFAULT;
  62 }
  63
  64 void ServerConfig::ClearStack()
  65 {
  66         include_stack.clear();
  67 }
  68
  69 Module* ServerConfig::GetIOHook(int port)
  70 {
  71         std::map<int,Module*>::iterator x = IOHookModule.find(port);
  72         return (x != IOHookModule.end() ? x->second : NULL);
  73 }
  74
  75 bool ServerConfig::AddIOHook(int port, Module* iomod)
  76 {
  77         if (!GetIOHook(port))
  78         {
  79                 IOHookModule[port] = iomod;
  80                 return true;
  81         }
  82         else
  83         {
  84                 ModuleException err("Port already hooked by another module");
  85                 throw(err);
  86                 return false;
  87         }
  88 }
  89
  90 bool ServerConfig::DelIOHook(int port)
  91 {
  92         std::map<int,Module*>::iterator x = IOHookModule.find(port);
  93         if (x != IOHookModule.end())
  94         {
  95                 IOHookModule.erase(x);
  96                 return true;
  97         }
  98         return false;
  99 }
 100
 101 bool ServerConfig::CheckOnce(char* tag, bool bail, userrec* user)
 102 {
 103         int count = ConfValueEnum(tag,&Config->config_f);
 104         if (count > 1)
 105         {
 106                 if (bail)
 107                 {
 108                         printf("There were errors in your configuration:\nYou have more than one <%s> tag, this is not permitted.\n",tag);
 109                         Exit(0);
 110                 }
 111                 else
 112                 {
 113                         if (user)
 114                         {
 115                                 WriteServ(user->fd,"There were errors in your configuration:");
 116                                 WriteServ(user->fd,"You have more than one <%s> tag, this is not permitted.\n",tag);
 117                         }
 118                         else
 119                         {
 120                                 WriteOpers("There were errors in the configuration file:");
 121                                 WriteOpers("You have more than one <%s> tag, this is not permitted.\n",tag);
 122                         }
 123                 }
 124                 return false;
 125         }
 126         if (count < 1)
 127         {
 128                 if (bail)
 129                 {
 130                         printf("There were errors in your configuration:\nYou have not defined a <%s> tag, this is required.\n",tag);
 131                         Exit(0);
 132                 }
 133                 else
 134                 {
 135                         if (user)
 136                         {
 137                                 WriteServ(user->fd,"There were errors in your configuration:");
 138                                 WriteServ(user->fd,"You have not defined a <%s> tag, this is required.",tag);
 139                         }
 140                         else
 141                         {
 142                                 WriteOpers("There were errors in the configuration file:");
 143                                 WriteOpers("You have not defined a <%s> tag, this is required.",tag);
 144                         }
 145                 }
 146                 return false;
 147         }
 148         return true;
 149 }
 150
 151 void ServerConfig::Read(bool bail, userrec* user)
 152 {
 153         /** Yes yes, i know, this function is craq worthy of
 154          * sirv. Its a mess, and some day i will tidy it.
 155          * ...But that day will not be today. or probaby not
 156          * tomorrow even, because it works fine.
 157          */
 158         char dbg[MAXBUF],pauseval[MAXBUF],Value[MAXBUF],timeout[MAXBUF],NB[MAXBUF],flood[MAXBUF],MW[MAXBUF],MCON[MAXBUF],MT[MAXBUF];
 159         char AH[MAXBUF],AP[MAXBUF],AF[MAXBUF],DNT[MAXBUF],pfreq[MAXBUF],thold[MAXBUF],sqmax[MAXBUF],rqmax[MAXBUF],SLIMT[MAXBUF];
 160         char localmax[MAXBUF],globalmax[MAXBUF],HS[MAXBUF];
 161         ConnectClass c;
 162         std::stringstream errstr;
 163         include_stack.clear();
 164
 165         if (!LoadConf(CONFIG_FILE,&Config->config_f,&errstr))
 166         {
 167                 errstr.seekg(0);
 168                 log(DEFAULT,"There were errors in your configuration:\n%s",errstr.str().c_str());
 169                 if (bail)
 170                 {
 171                         printf("There were errors in your configuration:\n%s",errstr.str().c_str());
 172                         Exit(0);
 173                 }
 174                 else
 175                 {
 176                         char dataline[1024];
 177                         if (user)
 178                         {
 179                                 WriteServ(user->fd,"NOTICE %s :There were errors in the configuration file:",user->nick);
 180                                 while (!errstr.eof())
 181                                 {
 182                                         errstr.getline(dataline,1024);
 183                                         WriteServ(user->fd,"NOTICE %s :%s",user->nick,dataline);
 184                                 }
 185                         }
 186                         else
 187                         {
 188                                 WriteOpers("There were errors in the configuration file:");
 189                                 while (!errstr.eof())
 190                                 {
 191                                         errstr.getline(dataline,1024);
 192                                         WriteOpers(dataline);
 193                                 }
 194                         }
 195                         return;
 196                 }
 197         }
 198
 199         /* Check we dont have more than one of singular tags
 200          */
 201         if (!CheckOnce("server",bail,user) || !CheckOnce("admin",bail,user) || !CheckOnce("files",bail,user)
 202                 || !CheckOnce("power",bail,user) || !CheckOnce("options",bail,user) || !CheckOnce("pid",bail,user))
 203         {
 204                 return;
 205         }
 206
 207         ConfValue("server","name",0,Config->ServerName,&Config->config_f);
 208         ConfValue("server","description",0,Config->ServerDesc,&Config->config_f);
 209         ConfValue("server","network",0,Config->Network,&Config->config_f);
 210         ConfValue("admin","name",0,Config->AdminName,&Config->config_f);
 211         ConfValue("admin","email",0,Config->AdminEmail,&Config->config_f);
 212         ConfValue("admin","nick",0,Config->AdminNick,&Config->config_f);
 213         ConfValue("files","motd",0,Config->motd,&Config->config_f);
 214         ConfValue("files","rules",0,Config->rules,&Config->config_f);
 215         ConfValue("power","diepass",0,Config->diepass,&Config->config_f);
 216         ConfValue("power","pause",0,pauseval,&Config->config_f);
 217         ConfValue("power","restartpass",0,Config->restartpass,&Config->config_f);
 218         ConfValue("options","prefixquit",0,Config->PrefixQuit,&Config->config_f);
 219         ConfValue("die","value",0,Config->DieValue,&Config->config_f);
 220         ConfValue("options","loglevel",0,dbg,&Config->config_f);
 221         ConfValue("options","netbuffersize",0,NB,&Config->config_f);
 222         ConfValue("options","maxwho",0,MW,&Config->config_f);
 223         ConfValue("options","allowhalfop",0,AH,&Config->config_f);
 224         ConfValue("options","allowprotect",0,AP,&Config->config_f);
 225         ConfValue("options","allowfounder",0,AF,&Config->config_f);
 226         ConfValue("dns","server",0,Config->DNSServer,&Config->config_f);
 227         ConfValue("dns","timeout",0,DNT,&Config->config_f);
 228         ConfValue("options","moduledir",0,Config->ModPath,&Config->config_f);
 229         ConfValue("disabled","commands",0,Config->DisabledCommands,&Config->config_f);
 230         ConfValue("options","somaxconn",0,MCON,&Config->config_f);
 231         ConfValue("options","softlimit",0,SLIMT,&Config->config_f);
 232         ConfValue("options","operonlystats",0,Config->OperOnlyStats,&Config->config_f);
 233         ConfValue("options","customversion",0,Config->CustomVersion,&Config->config_f);
 234         ConfValue("options","maxtargets",0,MT,&Config->config_f);
 235         ConfValue("options","hidesplits",0,HS,&Config->config_f);
 236         ConfValue("options","hidebans",0,HB,&Config->config_f);
 237         ConfValue("options","hidewhois",0,Config->HideWhoisServer,&Config->config_f);
 238         ConfValue("options","tempdir",0,Config->TempDir,&Config->config_f);
 239
 240         strlower(Config->ServerName);
 241
 242         if (!*Config->TempDir)
 243                 strlcpy(Config->TempDir,"/tmp",1024);
 244         Config->HideSplits = ((*HS == 'y') || (*HS == 'Y') || (*HS == '1') || (*HS == 't') || (*HS == 'T'));
 245         Config->HideBans = ((*HB == 'y') || (*HB == 'Y') || (*HB == '1') || (*HB == 't') || (*HB == 'T'));
 246         Config->SoftLimit = atoi(SLIMT);
 247         if (*MT)
 248                 Config->MaxTargets = atoi(MT);
 249         if ((Config->MaxTargets < 0) || (Config->MaxTargets > 31))
 250         {
 251                 log(DEFAULT,"WARNING: <options:maxtargets> value is greater than 31 or less than 0, set to 20.");
 252                 Config->MaxTargets = 20;
 253         }
 254         if ((Config->SoftLimit < 1) || (Config->SoftLimit > MAXCLIENTS))
 255         {
 256                 log(DEFAULT,"WARNING: <options:softlimit> value is greater than %d or less than 0, set to %d.",MAXCLIENTS,MAXCLIENTS);
 257                 Config->SoftLimit = MAXCLIENTS;
 258         }
 259         Config->MaxConn = atoi(MCON);
 260         if (Config->MaxConn > SOMAXCONN)
 261                 log(DEFAULT,"WARNING: <options:somaxconn> value may be higher than the system-defined SOMAXCONN value!");
 262         Config->NetBufferSize = atoi(NB);
 263         Config->MaxWhoResults = atoi(MW);
 264         Config->dns_timeout = atoi(DNT);
 265         if (!strchr(Config->ServerName,'.'))
 266         {
 267                 log(DEFAULT,"WARNING: <server:name> '%s' is not a fully-qualified domain name. Changed to '%s%c'",Config->ServerName,Config->ServerName,'.');
 268                 strlcat(Config->ServerName,".",MAXBUF);
 269         }
 270         if (!Config->dns_timeout)
 271                 Config->dns_timeout = 5;
 272         if (!Config->MaxConn)
 273                 Config->MaxConn = SOMAXCONN;
 274         if (!*Config->DNSServer)
 275         {
 276                 // attempt to look up their nameserver from /etc/resolv.conf
 277                 log(DEFAULT,"WARNING: <dns:server> not defined, attempting to find working server in /etc/resolv.conf...");
 278                 ifstream resolv("/etc/resolv.conf");
 279                 std::string nameserver;
 280                 bool found_server = false;
 281                 if (resolv.is_open())
 282                 {
 283                         while (resolv >> nameserver)
 284                         {
 285                                 if ((nameserver == "nameserver") && (!found_server))
 286                                 {
 287                                         resolv >> nameserver;
 288                                         strlcpy(Config->DNSServer,nameserver.c_str(),MAXBUF);
 289                                         found_server = true;
 290                                         log(DEFAULT,"<dns:server> set to '%s' as first resolver in /etc/resolv.conf.",nameserver.c_str());
 291                                 }
 292                         }
 293                         if (!found_server)
 294                         {
 295                                 log(DEFAULT,"/etc/resolv.conf contains no viable nameserver entries! Defaulting to nameserver '127.0.0.1'!");
 296                                 strlcpy(Config->DNSServer,"127.0.0.1",MAXBUF);
 297                         }
 298                 }
 299                 else
 300                 {
 301                         log(DEFAULT,"/etc/resolv.conf can't be opened! Defaulting to nameserver '127.0.0.1'!");
 302                         strlcpy(Config->DNSServer,"127.0.0.1",MAXBUF);
 303                 }
 304         }
 305         if (!*Config->ModPath)
 306                 strlcpy(Config->ModPath,MOD_PATH,MAXBUF);
 307         Config->AllowHalfop = ((!strcasecmp(AH,"true")) || (!strcasecmp(AH,"1")) || (!strcasecmp(AH,"yes")));
 308         if ((!Config->NetBufferSize) || (Config->NetBufferSize > 65535) || (Config->NetBufferSize < 1024))
 309         {
 310                 log(DEFAULT,"No NetBufferSize specified or size out of range, setting to default of 10240.");
 311                 Config->NetBufferSize = 10240;
 312         }
 313         if ((!Config->MaxWhoResults) || (Config->MaxWhoResults > 65535) || (Config->MaxWhoResults < 1))
 314         {
 315                 log(DEFAULT,"No MaxWhoResults specified or size out of range, setting to default of 128.");
 316                 Config->MaxWhoResults = 128;
 317         }
 318         Config->LogLevel = DEFAULT;
 319         if (!strcmp(dbg,"debug"))
 320         {
 321                 Config->LogLevel = DEBUG;
 322                 Config->debugging = 1;
 323         }
 324         if (!strcmp(dbg,"verbose"))
 325                 Config->LogLevel = VERBOSE;
 326         if (!strcmp(dbg,"default"))
 327                 Config->LogLevel = DEFAULT;
 328         if (!strcmp(dbg,"sparse"))
 329                 Config->LogLevel = SPARSE;
 330         if (!strcmp(dbg,"none"))
 331                 Config->LogLevel = NONE;
 332
 333         readfile(Config->MOTD,Config->motd);
 334         log(DEFAULT,"Reading message of the day...");
 335         readfile(Config->RULES,Config->rules);
 336         log(DEFAULT,"Reading connect classes...");
 337         Classes.clear();
 338         for (int i = 0; i < ConfValueEnum("connect",&Config->config_f); i++)
 339         {
 340                 *Value = 0;
 341                 ConfValue("connect","allow",i,Value,&Config->config_f);
 342                 ConfValue("connect","timeout",i,timeout,&Config->config_f);
 343                 ConfValue("connect","flood",i,flood,&Config->config_f);
 344                 ConfValue("connect","pingfreq",i,pfreq,&Config->config_f);
 345                 ConfValue("connect","threshold",i,thold,&Config->config_f);
 346                 ConfValue("connect","sendq",i,sqmax,&Config->config_f);
 347                 ConfValue("connect","recvq",i,rqmax,&Config->config_f);
 348                 ConfValue("connect","localmax",i,localmax,&Config->config_f);
 349                 ConfValue("connect","globalmax",i,globalmax,&Config->config_f);
 350                 if (*Value)
 351                 {
 352                         c.host = Value;
 353                         c.type = CC_ALLOW;
 354                         strlcpy(Value,"",MAXBUF);
 355                         ConfValue("connect","password",i,Value,&Config->config_f);
 356                         c.pass = Value;
 357                         c.registration_timeout = 90; // default is 2 minutes
 358                         c.pingtime = 120;
 359                         c.flood = atoi(flood);
 360                         c.threshold = 5;
 361                         c.sendqmax = 262144; // 256k
 362                         c.recvqmax = 4096;   // 4k
 363                         c.maxlocal = 3;
 364                         c.maxglobal = 3;
 365                         if (atoi(localmax)>0)
 366                         {
 367                                 c.maxlocal = atoi(localmax);
 368                         }
 369                         if (atoi(globalmax)>0)
 370                         {
 371                                 c.maxglobal = atoi(globalmax);
 372                         }
 373                         if (atoi(thold)>0)
 374                         {
 375                                 c.threshold = atoi(thold);
 376                         }
 377                         else
 378                         {
 379                                 c.threshold = 1;
 380                                 c.flood = 999;
 381                                 log(DEFAULT,"Warning: Connect allow line '%s' has no flood/threshold settings. Setting this tag to 999 lines in 1 second.",c.host.c_str());
 382                         }
 383                         if (atoi(sqmax)>0)
 384                         {
 385                                 c.sendqmax = atoi(sqmax);
 386                         }
 387                         if (atoi(rqmax)>0)
 388                         {
 389                                 c.recvqmax = atoi(rqmax);
 390                         }
 391                         if (atoi(timeout)>0)
 392                         {
 393                                 c.registration_timeout = atoi(timeout);
 394                         }
 395                         if (atoi(pfreq)>0)
 396                         {
 397                                 c.pingtime = atoi(pfreq);
 398                         }
 399                         Classes.push_back(c);
 400                 }
 401                 else
 402                 {
 403                         ConfValue("connect","deny",i,Value,&Config->config_f);
 404                         c.host = Value;
 405                         c.type = CC_DENY;
 406                         Classes.push_back(c);
 407                         log(DEBUG,"Read connect class type DENY, host=%s",c.host.c_str());
 408                 }
 409
 410         }
 411         log(DEFAULT,"Reading K lines,Q lines and Z lines from config...");
 412         read_xline_defaults();
 413         log(DEFAULT,"Applying K lines, Q lines and Z lines...");
 414         apply_lines(APPLY_ALL);
 415
 416         ConfValue("pid","file",0,Config->PID,&Config->config_f);
 417         // write once here, to try it out and make sure its ok
 418         WritePID(Config->PID);
 419
 420         log(DEFAULT,"Done reading configuration file, InspIRCd is now starting.");
 421         if (!bail)
 422         {
 423                 log(DEFAULT,"Adding and removing modules due to rehash...");
 424
 425                 std::vector<std::string> old_module_names, new_module_names, added_modules, removed_modules;
 426
 427                 // store the old module names
 428                 for (std::vector<std::string>::iterator t = module_names.begin(); t != module_names.end(); t++)
 429                 {
 430                         old_module_names.push_back(*t);
 431                 }
 432
 433                 // get the new module names
 434                 for (int count2 = 0; count2 < ConfValueEnum("module",&Config->config_f); count2++)
 435                 {
 436                         ConfValue("module","name",count2,Value,&Config->config_f);
 437                         new_module_names.push_back(Value);
 438                 }
 439
 440                 // now create a list of new modules that are due to be loaded
 441                 // and a seperate list of modules which are due to be unloaded
 442                 for (std::vector<std::string>::iterator _new = new_module_names.begin(); _new != new_module_names.end(); _new++)
 443                 {
 444                         bool added = true;
 445                         for (std::vector<std::string>::iterator old = old_module_names.begin(); old != old_module_names.end(); old++)
 446                         {
 447                                 if (*old == *_new)
 448                                         added = false;
 449                         }
 450                         if (added)
 451                                 added_modules.push_back(*_new);
 452                 }
 453                 for (std::vector<std::string>::iterator oldm = old_module_names.begin(); oldm != old_module_names.end(); oldm++)
 454                 {
 455                         bool removed = true;
 456                         for (std::vector<std::string>::iterator newm = new_module_names.begin(); newm != new_module_names.end(); newm++)
 457                         {
 458                                 if (*newm == *oldm)
 459                                         removed = false;
 460                         }
 461                         if (removed)
 462                                 removed_modules.push_back(*oldm);
 463                 }
 464                 // now we have added_modules, a vector of modules to be loaded, and removed_modules, a vector of modules
 465                 // to be removed.
 466                 int rem = 0, add = 0;
 467                 if (!removed_modules.empty())
 468                 for (std::vector<std::string>::iterator removing = removed_modules.begin(); removing != removed_modules.end(); removing++)
 469                 {
 470                         if (ServerInstance->UnloadModule(removing->c_str()))
 471                         {
 472                                 WriteOpers("*** REHASH UNLOADED MODULE: %s",removing->c_str());
 473                                 if (user)
 474                                         WriteServ(user->fd,"973 %s %s :Module %s successfully unloaded.",user->nick, removing->c_str(), removing->c_str());
 475                                 rem++;
 476                         }
 477                         else
 478                         {
 479                                 if (user)
 480                                         WriteServ(user->fd,"972 %s %s :Failed to unload module %s: %s",user->nick, removing->c_str(), removing->c_str(), ServerInstance->ModuleError());
 481                         }
 482                 }
 483                 if (!added_modules.empty())
 484                 for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 485                 {
 486                         if (ServerInstance->LoadModule(adding->c_str()))
 487                         {
 488                                 WriteOpers("*** REHASH LOADED MODULE: %s",adding->c_str());
 489                                 if (user)
 490                                         WriteServ(user->fd,"975 %s %s :Module %s successfully loaded.",user->nick, adding->c_str(), adding->c_str());
 491                                 add++;
 492                         }
 493                         else
 494                         {
 495                                 if (user)
 496                                         WriteServ(user->fd,"974 %s %s :Failed to load module %s: %s",user->nick, adding->c_str(), adding->c_str(), ServerInstance->ModuleError());
 497                         }
 498                 }
 499                 log(DEFAULT,"Successfully unloaded %lu of %lu modules and loaded %lu of %lu modules.",(unsigned long)rem,(unsigned long)removed_modules.size(),
 500                                                                                                         (unsigned long)add,(unsigned long)added_modules.size());
 501         }
 502 }
 503
 504
 505 void Exit (int status)
 506 {
 507         if (Config->log_file)
 508                 fclose(Config->log_file);
 509         send_error("Server shutdown.");
 510         exit (status);
 511 }
 512
 513 void Killed(int status)
 514 {
 515         if (Config->log_file)
 516                 fclose(Config->log_file);
 517         send_error("Server terminated.");
 518         exit(status);
 519 }
 520
 521 char* CleanFilename(char* name)
 522 {
 523         char* p = name + strlen(name);
 524         while ((p != name) && (*p != '/')) p--;
 525         return (p != name ? ++p : p);
 526 }
 527
 528
 529 void Rehash(int status)
 530 {
 531         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 532         fclose(Config->log_file);
 533         OpenLog(NULL,0);
 534         Config->Read(false,NULL);
 535         FOREACH_MOD(I_OnRehash,OnRehash(""));
 536 }
 537
 538
 539
 540 void Start (void)
 541 {
 542         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 543         printf("(C) ChatSpike Development team.\033[0m\n\n");
 544         printf("Developers:\033[1;32m     Brain, FrostyCoolSlug\033[0m\n");
 545         printf("Documentation:\033[1;32m  FrostyCoolSlug, w00t\033[0m\n");
 546         printf("Testers:\033[1;32m        typobox43, piggles, Lord_Zathras, CC\033[0m\n");
 547         printf("Name concept:\033[1;32m   Lord_Zathras\033[0m\n\n");
 548 }
 549
 550 void WritePID(std::string filename)
 551 {
 552         ofstream outfile(filename.c_str());
 553         if (outfile.is_open())
 554         {
 555                 outfile << getpid();
 556                 outfile.close();
 557         }
 558         else
 559         {
 560                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 561                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 562                 Exit(0);
 563         }
 564 }
 565
 566 void SetSignals()
 567 {
 568         signal (SIGALRM, SIG_IGN);
 569         signal (SIGHUP, Rehash);
 570         signal (SIGPIPE, SIG_IGN);
 571         signal (SIGTERM, Exit);
 572         signal (SIGSEGV, Error);
 573 }
 574
 575
 576 int DaemonSeed (void)
 577 {
 578         int childpid;
 579         if ((childpid = fork ()) < 0)
 580                 return (ERROR);
 581         else if (childpid > 0)
 582                 exit (0);
 583         setsid ();
 584         umask (007);
 585         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 586
 587         if (Config->unlimitcore)
 588         {
 589                 rlimit rl;
 590                 if (getrlimit(RLIMIT_CORE, &rl) == -1)
 591                 {
 592                         log(DEFAULT,"Failed to getrlimit()!");
 593                         return(FALSE);
 594                 }
 595                 else
 596                 {
 597                         rl.rlim_cur = rl.rlim_max;
 598                         if (setrlimit(RLIMIT_CORE, &rl) == -1)
 599                                 log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 600                 }
 601         }
 602
 603         return (TRUE);
 604 }
 605
 606
 607 /* Make Sure Modules Are Avaliable!
 608  * (BugFix By Craig.. See? I do work! :p)
 609  * Modified by brain, requires const char*
 610  * to work with other API functions
 611  */
 612
 613 bool FileExists (const char* file)
 614 {
 615         FILE *input;
 616         if ((input = fopen (file, "r")) == NULL)
 617         {
 618                 return(false);
 619         }
 620         else
 621         {
 622                 fclose (input);
 623                 return(true);
 624         }
 625 }
 626
 627 /* ConfProcess does the following things to a config line in the following order:
 628  *
 629  * Processes the line for syntax errors as shown below
 630  *      (1) Line void of quotes or equals (a malformed, illegal tag format)
 631  *      (2) Odd number of quotes on the line indicating a missing quote
 632  *      (3) number of equals signs not equal to number of quotes / 2 (missing an equals sign)
 633  *      (4) Spaces between the opening bracket (<) and the keyword
 634  *      (5) Spaces between a keyword and an equals sign
 635  *      (6) Spaces between an equals sign and a quote
 636  * Removes trailing spaces
 637  * Removes leading spaces
 638  * Converts tabs to spaces
 639  * Turns multiple spaces that are outside of quotes into single spaces
 640  */
 641
 642 std::string ServerConfig::ConfProcess(char* buffer, long linenumber, std::stringstream* errorstream, bool &error, std::string filename)
 643 {
 644         long number_of_quotes = 0;
 645         long number_of_equals = 0;
 646         bool has_open_bracket = false;
 647         bool in_quotes = false;
 648         error = false;
 649         if (!buffer)
 650         {
 651                 return "";
 652         }
 653         // firstly clean up the line by stripping spaces from the start and end and converting tabs to spaces
 654         for (char* d = buffer; *d; d++)
 655                 if (*d == 9)
 656                         *d = ' ';
 657         while (*buffer == ' ') buffer++;
 658         while ((buffer[strlen(buffer)-1] == ' ') && (*buffer)) buffer[strlen(buffer)-1] = '\0';
 659
 660         // empty lines are syntactically valid, as are comments
 661         if (!(*buffer) || buffer[0] == '#')
 662                 return "";
 663
 664         for (unsigned int c = 0; c < strlen(buffer); c++)
 665         {
 666                 // convert all spaces that are OUTSIDE quotes into hardspace (0xA0) as this will make them easier to
 667                 // search and replace later :)
 668                 if ((!in_quotes) && (buffer[c] == ' '))
 669                         buffer[c] = '\xA0';
 670                 if ((buffer[c] == '<') && (!in_quotes))
 671                 {
 672                         has_open_bracket = true;
 673                         if (strlen(buffer) == 1)
 674                         {
 675                                 *errorstream << "Tag without identifier at " << filename << ":" << linenumber << endl;
 676                                 error = true;
 677                                 return "";
 678                         }
 679                         else if ((tolower(buffer[c+1]) < 'a') || (tolower(buffer[c+1]) > 'z'))
 680                         {
 681                                 *errorstream << "Invalid characters in identifier at " << filename << ":" << linenumber << endl;
 682                                 error = true;
 683                                 return "";
 684                         }
 685                 }
 686                 if (buffer[c] == '"')
 687                 {
 688                         number_of_quotes++;
 689                         in_quotes = (!in_quotes);
 690                 }
 691                 if ((buffer[c] == '=') && (!in_quotes))
 692                 {
 693                         number_of_equals++;
 694                         if (strlen(buffer) == c)
 695                         {
 696                                 *errorstream << "Variable without a value at " << filename << ":" << linenumber << endl;
 697                                 error = true;
 698                                 return "";
 699                         }
 700                         else if (buffer[c+1] != '"')
 701                         {
 702                                 *errorstream << "Variable name not followed immediately by its value at " << filename << ":" << linenumber << endl;
 703                                 error = true;
 704                                 return "";
 705                         }
 706                         else if (!c)
 707                         {
 708                                 *errorstream << "Value without a variable (line starts with '=') at " << filename << ":" << linenumber << endl;
 709                                 error = true;
 710                                 return "";
 711                         }
 712                         else if (buffer[c-1] == '\xA0')
 713                         {
 714                                 *errorstream << "Variable name not followed immediately by its value at " << filename << ":" << linenumber << endl;
 715                                 error = true;
 716                                 return "";
 717                         }
 718                 }
 719         }
 720         // no quotes, and no equals. something freaky.
 721         if ((!number_of_quotes) || (!number_of_equals) && (strlen(buffer)>2) && (buffer[0]=='<'))
 722         {
 723                 *errorstream << "Malformed tag at " << filename << ":" << linenumber << endl;
 724                 error = true;
 725                 return "";
 726         }
 727         // odd number of quotes. thats just wrong.
 728         if ((number_of_quotes % 2) != 0)
 729         {
 730                 *errorstream << "Missing \" at " << filename << ":" << linenumber << endl;
 731                 error = true;
 732                 return "";
 733         }
 734         if (number_of_equals < (number_of_quotes/2))
 735         {
 736                 *errorstream << "Missing '=' at " << filename << ":" << linenumber << endl;
 737         }
 738         if (number_of_equals > (number_of_quotes/2))
 739         {
 740                 *errorstream << "Too many '=' at " << filename << ":" << linenumber << endl;
 741         }
 742
 743         std::string parsedata = buffer;
 744         // turn multispace into single space
 745         while (parsedata.find("\xA0\xA0") != std::string::npos)
 746         {
 747                 parsedata.erase(parsedata.find("\xA0\xA0"),1);
 748         }
 749
 750         // turn our hardspace back into softspace
 751         for (unsigned int d = 0; d < parsedata.length(); d++)
 752         {
 753                 if (parsedata[d] == '\xA0')
 754                         parsedata[d] = ' ';
 755         }
 756
 757         // and we're done, the line is fine!
 758         return parsedata;
 759 }
 760
 761 int ServerConfig::fgets_safe(char* buffer, size_t maxsize, FILE* &file)
 762 {
 763         char c_read = '\0';
 764         unsigned int bufptr = 0;
 765         while ((!feof(file)) && (c_read != '\n') && (c_read != '\r') && (bufptr < maxsize))
 766         {
 767                 c_read = fgetc(file);
 768                 if ((c_read != '\n') && (c_read != '\r'))
 769                         buffer[bufptr++] = c_read;
 770         }
 771         buffer[bufptr] = '\0';
 772         return bufptr;
 773 }
 774
 775 bool ServerConfig::LoadConf(const char* filename, std::stringstream *target, std::stringstream* errorstream)
 776 {
 777         target->str("");
 778         errorstream->str("");
 779         long linenumber = 1;
 780         // first, check that the file exists before we try to do anything with it
 781         if (!FileExists(filename))
 782         {
 783                 *errorstream << "File " << filename << " not found." << endl;
 784                 return false;
 785         }
 786         // Fix the chmod of the file to restrict it to the current user and group
 787         chmod(filename,0600);
 788         for (unsigned int t = 0; t < include_stack.size(); t++)
 789         {
 790                 if (std::string(filename) == include_stack[t])
 791                 {
 792                         *errorstream << "File " << filename << " is included recursively (looped inclusion)." << endl;
 793                         return false;
 794                 }
 795         }
 796         include_stack.push_back(filename);
 797         // now open it
 798         FILE* conf = fopen(filename,"r");
 799         char buffer[MAXBUF];
 800         if (conf)
 801         {
 802                 while (!feof(conf))
 803                 {
 804                         if (fgets_safe(buffer, MAXBUF, conf))
 805                         {
 806                                 if ((!feof(conf)) && (buffer) && (strlen(buffer)))
 807                                 {
 808                                         if ((buffer[0] != '#') && (buffer[0] != '\r')  && (buffer[0] != '\n'))
 809                                         {
 810                                                 if (!strncmp(buffer,"<include file=\"",15))
 811                                                 {
 812                                                         char* buf = buffer;
 813                                                         char confpath[10240],newconf[10240];
 814                                                         // include file directive
 815                                                         buf += 15;      // advance to filename
 816                                                         for (unsigned int j = 0; j < strlen(buf); j++)
 817                                                         {
 818                                                                 if (buf[j] == '\\')
 819                                                                         buf[j] = '/';
 820                                                                 if (buf[j] == '"')
 821                                                                 {
 822                                                                         buf[j] = '\0';
 823                                                                         break;
 824                                                                 }
 825                                                         }
 826                                                         log(DEBUG,"Opening included file '%s'",buf);
 827                                                         if (*buf != '/')
 828                                                         {
 829                                                                 strlcpy(confpath,CONFIG_FILE,10240);
 830                                                                 if (strstr(confpath,"/inspircd.conf"))
 831                                                                 {
 832                                                                         // leaves us with just the path
 833                                                                         *(strstr(confpath,"/inspircd.conf")) = '\0';
 834                                                                 }
 835                                                                 snprintf(newconf,10240,"%s/%s",confpath,buf);
 836                                                         }
 837                                                         else strlcpy(newconf,buf,10240);
 838                                                         std::stringstream merge(stringstream::in | stringstream::out);
 839                                                         // recursively call LoadConf and get the new data, use the same errorstream
 840                                                         if (LoadConf(newconf, &merge, errorstream))
 841                                                         {
 842                                                                 // append to the end of the file
 843                                                                 std::string newstuff = merge.str();
 844                                                                 *target << newstuff;
 845                                                         }
 846                                                         else
 847                                                         {
 848                                                                 // the error propogates up to its parent recursively
 849                                                                 // causing the config reader to bail at the top level.
 850                                                                 fclose(conf);
 851                                                                 return false;
 852                                                         }
 853                                                 }
 854                                                 else
 855                                                 {
 856                                                         bool error = false;
 857                                                         std::string data = this->ConfProcess(buffer,linenumber++,errorstream,error,filename);
 858                                                         if (error)
 859                                                         {
 860                                                                 return false;
 861                                                         }
 862                                                         *target << data;
 863                                                 }
 864                                         }
 865                                         else linenumber++;
 866                                 }
 867                         }
 868                 }
 869                 fclose(conf);
 870         }
 871         target->seekg(0);
 872         return true;
 873 }
 874
 875 /* Counts the number of tags of a certain type within the config file, e.g. to enumerate opers */
 876
 877 int ServerConfig::EnumConf(std::stringstream *config, const char* tag)
 878 {
 879         int ptr = 0;
 880         char buffer[MAXBUF], c_tag[MAXBUF], c, lastc;
 881         int in_token, in_quotes, tptr, idx = 0;
 882
 883         std::string x = config->str();
 884         const char* buf = x.c_str();
 885         long bptr = 0;
 886         long len = config->str().length();
 887
 888         ptr = 0;
 889         in_token = 0;
 890         in_quotes = 0;
 891         lastc = '\0';
 892         while (bptr<len)
 893         {
 894                 lastc = c;
 895                 c = buf[bptr++];
 896                 if ((c == '#') && (lastc == '\n'))
 897                 {
 898                         while ((c != '\n') && (bptr<len))
 899                         {
 900                                 lastc = c;
 901                                 c = buf[bptr++];
 902                         }
 903                 }
 904                 if ((c == '<') && (!in_quotes))
 905                 {
 906                         tptr = 0;
 907                         in_token = 1;
 908                         do {
 909                                 c = buf[bptr++];
 910                                 if (c != ' ')
 911                                 {
 912                                         c_tag[tptr++] = c;
 913                                         c_tag[tptr] = '\0';
 914                                 }
 915                         } while (c != ' ');
 916                 }
 917                 if (c == '"')
 918                 {
 919                         in_quotes = (!in_quotes);
 920                 }
 921                 if ((c == '>') && (!in_quotes))
 922                 {
 923                         in_token = 0;
 924                         if (!strcmp(c_tag,tag))
 925                         {
 926                                 /* correct tag, but wrong index */
 927                                 idx++;
 928                         }
 929                         c_tag[0] = '\0';
 930                         buffer[0] = '\0';
 931                         ptr = 0;
 932                         tptr = 0;
 933                 }
 934                 if (c != '>')
 935                 {
 936                         if ((in_token) && (c != '\n') && (c != '\r'))
 937                         {
 938                                 buffer[ptr++] = c;
 939                                 buffer[ptr] = '\0';
 940                         }
 941                 }
 942         }
 943         return idx;
 944 }
 945
 946 /* Counts the number of values within a certain tag */
 947
 948 int ServerConfig::EnumValues(std::stringstream *config, const char* tag, int index)
 949 {
 950         int ptr = 0;
 951         char buffer[MAXBUF], c_tag[MAXBUF], c, lastc;
 952         int in_token, in_quotes, tptr, idx = 0;
 953
 954         bool correct_tag = false;
 955         int num_items = 0;
 956
 957         const char* buf = config->str().c_str();
 958         long bptr = 0;
 959         long len = strlen(buf);
 960
 961         ptr = 0;
 962         in_token = 0;
 963         in_quotes = 0;
 964         lastc = '\0';
 965         while (bptr<len)
 966         {
 967                 lastc = c;
 968                 c = buf[bptr++];
 969                 if ((c == '#') && (lastc == '\n'))
 970                 {
 971                         while ((c != '\n') && (bptr<len))
 972                         {
 973                                 lastc = c;
 974                                 c = buf[bptr++];
 975                         }
 976                 }
 977                 if ((c == '<') && (!in_quotes))
 978                 {
 979                         tptr = 0;
 980                         in_token = 1;
 981                         do {
 982                                 c = buf[bptr++];
 983                                 if (c != ' ')
 984                                 {
 985                                         c_tag[tptr++] = c;
 986                                         c_tag[tptr] = '\0';
 987
 988                                         if ((!strcmp(c_tag,tag)) && (idx == index))
 989                                         {
 990                                                 correct_tag = true;
 991                                         }
 992                                 }
 993                         } while (c != ' ');
 994                 }
 995                 if (c == '"')
 996                 {
 997                         in_quotes = (!in_quotes);
 998                 }
 999
1000                 if ( (correct_tag) && (!in_quotes) && ( (c == ' ') || (c == '\n') || (c == '\r') ) )
1001                 {
1002                         num_items++;
1003                 }
1004                 if ((c == '>') && (!in_quotes))
1005                 {
1006                         in_token = 0;
1007                         if (correct_tag)
1008                                 correct_tag = false;
1009                         if (!strcmp(c_tag,tag))
1010                         {
1011                                 /* correct tag, but wrong index */
1012                                 idx++;
1013                         }
1014                         c_tag[0] = '\0';
1015                         buffer[0] = '\0';
1016                         ptr = 0;
1017                         tptr = 0;
1018                 }
1019                 if (c != '>')
1020                 {
1021                         if ((in_token) && (c != '\n') && (c != '\r'))
1022                         {
1023                                 buffer[ptr++] = c;
1024                                 buffer[ptr] = '\0';
1025                         }
1026                 }
1027         }
1028         return num_items+1;
1029 }
1030
1031
1032
1033 int ServerConfig::ConfValueEnum(char* tag, std::stringstream* config)
1034 {
1035         return EnumConf(config,tag);
1036 }
1037
1038
1039
1040 /* Retrieves a value from the config file. If there is more than one value of the specified
1041  * key and section (e.g. for opers etc) then the index value specifies which to retreive, e.g.
1042  *
1043  * ConfValue("oper","name",2,result);
1044  */
1045
1046 int ServerConfig::ReadConf(std::stringstream *config, const char* tag, const char* var, int index, char *result)
1047 {
1048         int ptr = 0;
1049         char buffer[65535], c_tag[MAXBUF], c, lastc;
1050         int in_token, in_quotes, tptr, idx = 0;
1051         char* key;
1052
1053         std::string x = config->str();
1054         const char* buf = x.c_str();
1055         long bptr = 0;
1056         long len = config->str().length();
1057
1058         ptr = 0;
1059         in_token = 0;
1060         in_quotes = 0;
1061         lastc = '\0';
1062         c_tag[0] = '\0';
1063         buffer[0] = '\0';
1064         while (bptr<len)
1065         {
1066                 lastc = c;
1067                 c = buf[bptr++];
1068                 // FIX: Treat tabs as spaces
1069                 if (c == 9)
1070                         c = 32;
1071                 if ((c == '<') && (!in_quotes))
1072                 {
1073                         tptr = 0;
1074                         in_token = 1;
1075                         do {
1076                                 c = buf[bptr++];
1077                                 if (c != ' ')
1078                                 {
1079                                         c_tag[tptr++] = c;
1080                                         c_tag[tptr] = '\0';
1081                                 }
1082                         // FIX: Tab can follow a tagname as well as space.
1083                         } while ((c != ' ') && (c != 9));
1084                 }
1085                 if (c == '"')
1086                 {
1087                         in_quotes = (!in_quotes);
1088                 }
1089                 if ((c == '>') && (!in_quotes))
1090                 {
1091                         in_token = 0;
1092                         if (idx == index)
1093                         {
1094                                 if (!strcmp(c_tag,tag))
1095                                 {
1096                                         if ((buffer) && (c_tag) && (var))
1097                                         {
1098                                                 key = strstr(buffer,var);
1099                                                 if (!key)
1100                                                 {
1101                                                         /* value not found in tag */
1102                                                         *result = 0;
1103                                                         return 0;
1104                                                 }
1105                                                 else
1106                                                 {
1107                                                         key+=strlen(var);
1108                                                         while (*key !='"')
1109                                                         {
1110                                                                 if (!*key)
1111                                                                 {
1112                                                                         /* missing quote */
1113                                                                         *result = 0;
1114                                                                         return 0;
1115                                                                 }
1116                                                                 key++;
1117                                                         }
1118                                                         key++;
1119                                                         for (unsigned j = 0; j < strlen(key); j++)
1120                                                         {
1121                                                                 if (key[j] == '"')
1122                                                                 {
1123                                                                         key[j] = '\0';
1124                                                                 }
1125                                                         }
1126                                                         strlcpy(result,key,MAXBUF);
1127                                                         return 1;
1128                                                 }
1129                                         }
1130                                 }
1131                         }
1132                         if (!strcmp(c_tag,tag))
1133                         {
1134                                 /* correct tag, but wrong index */
1135                                 idx++;
1136                         }
1137                         c_tag[0] = '\0';
1138                         buffer[0] = '\0';
1139                         ptr = 0;
1140                         tptr = 0;
1141                 }
1142                 if (c != '>')
1143                 {
1144                         if ((in_token) && (c != '\n') && (c != '\r'))
1145                         {
1146                                 buffer[ptr++] = c;
1147                                 buffer[ptr] = '\0';
1148                         }
1149                 }
1150         }
1151         *result = 0; // value or its tag not found at all
1152         return 0;
1153 }
1154
1155
1156
1157 int ServerConfig::ConfValue(char* tag, char* var, int index, char *result,std::stringstream *config)
1158 {
1159         ReadConf(config, tag, var, index, result);
1160         return 0;
1161 }
1162
1163
1164
1165 // This will bind a socket to a port. It works for UDP/TCP
1166 int BindSocket (int sockfd, struct sockaddr_in client, struct sockaddr_in server, int port, char* addr)
1167 {
1168         memset((char *)&server,0,sizeof(server));
1169         struct in_addr addy;
1170         inet_aton(addr,&addy);
1171         server.sin_family = AF_INET;
1172         if (!strcmp(addr,""))
1173         {
1174                 server.sin_addr.s_addr = htonl(INADDR_ANY);
1175         }
1176         else
1177         {
1178                 server.sin_addr = addy;
1179         }
1180         server.sin_port = htons(port);
1181         if (bind(sockfd,(struct sockaddr*)&server,sizeof(server))<0)
1182         {
1183                 return(ERROR);
1184         }
1185         else
1186         {
1187                 listen(sockfd, Config->MaxConn);
1188                 return(TRUE);
1189         }
1190 }
1191
1192
1193 // Open a TCP Socket
1194 int OpenTCPSocket (void)
1195 {
1196         int sockfd;
1197         int on = 1;
1198         struct linger linger = { 0 };
1199
1200         if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
1201                 return (ERROR);
1202         else
1203         {
1204                 setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char*)&on, sizeof(on));
1205                 /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
1206                 linger.l_onoff = 1;
1207                 linger.l_linger = 1;
1208                 setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (const char*)&linger,sizeof(linger));
1209                 return (sockfd);
1210         }
1211 }
1212
1213 int BindPorts()
1214 {
1215         char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
1216         sockaddr_in client,server;
1217         int clientportcount = 0;
1218         int BoundPortCount = 0;
1219         for (int count = 0; count < Config->ConfValueEnum("bind",&Config->config_f); count++)
1220         {
1221                 Config->ConfValue("bind","port",count,configToken,&Config->config_f);
1222                 Config->ConfValue("bind","address",count,Addr,&Config->config_f);
1223                 Config->ConfValue("bind","type",count,Type,&Config->config_f);
1224                 if ((!*Type) || (!strcmp(Type,"clients")))
1225                 {
1226                         // modules handle server bind types now
1227                         Config->ports[clientportcount] = atoi(configToken);
1228
1229                         // If the client put bind "*", this is an unrealism.
1230                         // We don't actually support this as documented, but
1231                         // i got fed up of people trying it, so now it converts
1232                         // it to an empty string meaning the same 'bind to all'.
1233                         if (*Addr == '*')
1234                                 *Addr = 0;
1235
1236                         strlcpy(Config->addrs[clientportcount],Addr,256);
1237                         clientportcount++;
1238                         log(DEBUG,"InspIRCd: startup: read binding %s:%s [%s] from config",Addr,configToken, Type);
1239                 }
1240         }
1241         int PortCount = clientportcount;
1242
1243         for (int count = 0; count < PortCount; count++)
1244         {
1245                 if ((openSockfd[BoundPortCount] = OpenTCPSocket()) == ERROR)
1246                 {
1247                         log(DEBUG,"InspIRCd: startup: bad fd %lu binding port [%s:%d]",(unsigned long)openSockfd[BoundPortCount],Config->addrs[count],(unsigned long)Config->ports[count]);
1248                         return(ERROR);
1249                 }
1250                 if (BindSocket(openSockfd[BoundPortCount],client,server,Config->ports[count],Config->addrs[count]) == ERROR)
1251                 {
1252                         log(DEFAULT,"InspIRCd: startup: failed to bind port [%s:%lu]: %s",Config->addrs[count],(unsigned long)Config->ports[count],strerror(errno));
1253                 }
1254                 else    /* well we at least bound to one socket so we'll continue */
1255                 {
1256                         BoundPortCount++;
1257                 }
1258         }
1259
1260         /* if we didn't bind to anything then abort */
1261         if (!BoundPortCount)
1262         {
1263                 log(DEFAULT,"InspIRCd: startup: no ports bound, bailing!");
1264                 printf("\nERROR: Was not able to bind any of %lu ports! Please check your configuration.\n\n", (unsigned long)PortCount);
1265                 return (ERROR);
1266         }
1267
1268         return BoundPortCount;
1269 }
1270