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