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