src/inspircd_io.cpp

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