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