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