src/inspircd_io.cpp

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