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