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