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",CleanFilename(CONFIG_FILE));
 416         fclose(Config->log_file);
 417         OpenLog(NULL,0);
 418         Config->Read(false,NULL);
 419         FOREACH_MOD(I_OnRehash,OnRehash(""));
 420 }
 421
 422
 423
 424 void Start (void)
 425 {
 426         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 427         printf("(C) ChatSpike Development team.\033[0m\n\n");
 428         printf("Developers:\033[1;32m     Brain, FrostyCoolSlug\033[0m\n");
 429         printf("Documentation:\033[1;32m  FrostyCoolSlug, w00t\033[0m\n");
 430         printf("Testers:\033[1;32m        typobox43, piggles, Lord_Zathras, CC\033[0m\n");
 431         printf("Name concept:\033[1;32m   Lord_Zathras\033[0m\n\n");
 432 }
 433
 434 void WritePID(std::string filename)
 435 {
 436         ofstream outfile(filename.c_str());
 437         if (outfile.is_open())
 438         {
 439                 outfile << getpid();
 440                 outfile.close();
 441         }
 442         else
 443         {
 444                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 445                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 446                 Exit(0);
 447         }
 448 }
 449
 450 void SetSignals()
 451 {
 452         signal (SIGALRM, SIG_IGN);
 453         signal (SIGHUP, Rehash);
 454         signal (SIGPIPE, SIG_IGN);
 455         signal (SIGTERM, Exit);
 456         signal (SIGSEGV, Error);
 457 }
 458
 459
 460 int DaemonSeed (void)
 461 {
 462         int childpid;
 463         if ((childpid = fork ()) < 0)
 464                 return (ERROR);
 465         else if (childpid > 0)
 466                 exit (0);
 467         setsid ();
 468         umask (007);
 469         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 470
 471         setpriority(PRIO_PROCESS,(int)getpid(),15);
 472
 473         if (Config->unlimitcore)
 474         {
 475                 rlimit rl;
 476                 if (getrlimit(RLIMIT_CORE, &rl) == -1)
 477                 {
 478                         log(DEFAULT,"Failed to getrlimit()!");
 479                         return(FALSE);
 480                 }
 481                 else
 482                 {
 483                         rl.rlim_cur = rl.rlim_max;
 484                         if (setrlimit(RLIMIT_CORE, &rl) == -1)
 485                                 log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 486                 }
 487         }
 488
 489         return (TRUE);
 490 }
 491
 492
 493 /* Make Sure Modules Are Avaliable!
 494  * (BugFix By Craig.. See? I do work! :p)
 495  * Modified by brain, requires const char*
 496  * to work with other API functions
 497  */
 498
 499 bool FileExists (const char* file)
 500 {
 501         FILE *input;
 502         if ((input = fopen (file, "r")) == NULL)
 503         {
 504                 return(false);
 505         }
 506         else
 507         {
 508                 fclose (input);
 509                 return(true);
 510         }
 511 }
 512
 513 /* ConfProcess does the following things to a config line in the following order:
 514  *
 515  * Processes the line for syntax errors as shown below
 516  *      (1) Line void of quotes or equals (a malformed, illegal tag format)
 517  *      (2) Odd number of quotes on the line indicating a missing quote
 518  *      (3) number of equals signs not equal to number of quotes / 2 (missing an equals sign)
 519  *      (4) Spaces between the opening bracket (<) and the keyword
 520  *      (5) Spaces between a keyword and an equals sign
 521  *      (6) Spaces between an equals sign and a quote
 522  * Removes trailing spaces
 523  * Removes leading spaces
 524  * Converts tabs to spaces
 525  * Turns multiple spaces that are outside of quotes into single spaces
 526  */
 527
 528 std::string ServerConfig::ConfProcess(char* buffer, long linenumber, std::stringstream* errorstream, bool &error, std::string filename)
 529 {
 530         long number_of_quotes = 0;
 531         long number_of_equals = 0;
 532         bool has_open_bracket = false;
 533         bool in_quotes = false;
 534         error = false;
 535         if (!buffer)
 536         {
 537                 return "";
 538         }
 539         // firstly clean up the line by stripping spaces from the start and end and converting tabs to spaces
 540         for (unsigned int d = 0; d < strlen(buffer); d++)
 541                 if ((buffer[d]) == 9)
 542                         buffer[d] = ' ';
 543         while ((buffer[0] == ' ') && (strlen(buffer)>0)) buffer++;
 544         while ((buffer[strlen(buffer)-1] == ' ') && (strlen(buffer)>0)) buffer[strlen(buffer)-1] = '\0';
 545
 546         // empty lines are syntactically valid, as are comments
 547         if (!(*buffer) || buffer[0] == '#')
 548                 return "";
 549
 550         for (unsigned int c = 0; c < strlen(buffer); c++)
 551         {
 552                 // convert all spaces that are OUTSIDE quotes into hardspace (0xA0) as this will make them easier to
 553                 // search and replace later :)
 554                 if ((!in_quotes) && (buffer[c] == ' '))
 555                         buffer[c] = '\xA0';
 556                 if ((buffer[c] == '<') && (!in_quotes))
 557                 {
 558                         has_open_bracket = true;
 559                         if (strlen(buffer) == 1)
 560                         {
 561                                 *errorstream << "Tag without identifier at " << filename << ":" << linenumber << endl;
 562                                 error = true;
 563                                 return "";
 564                         }
 565                         else if ((tolower(buffer[c+1]) < 'a') || (tolower(buffer[c+1]) > 'z'))
 566                         {
 567                                 *errorstream << "Invalid characters in identifier at " << filename << ":" << linenumber << endl;
 568                                 error = true;
 569                                 return "";
 570                         }
 571                 }
 572                 if (buffer[c] == '"')
 573                 {
 574                         number_of_quotes++;
 575                         in_quotes = (!in_quotes);
 576                 }
 577                 if ((buffer[c] == '=') && (!in_quotes))
 578                 {
 579                         number_of_equals++;
 580                         if (strlen(buffer) == c)
 581                         {
 582                                 *errorstream << "Variable without a value at " << filename << ":" << linenumber << endl;
 583                                 error = true;
 584                                 return "";
 585                         }
 586                         else if (buffer[c+1] != '"')
 587                         {
 588                                 *errorstream << "Variable name not followed immediately by its value at " << filename << ":" << linenumber << endl;
 589                                 error = true;
 590                                 return "";
 591                         }
 592                         else if (!c)
 593                         {
 594                                 *errorstream << "Value without a variable (line starts with '=') at " << filename << ":" << linenumber << endl;
 595                                 error = true;
 596                                 return "";
 597                         }
 598                         else if (buffer[c-1] == '\xA0')
 599                         {
 600                                 *errorstream << "Variable name not followed immediately by its value at " << filename << ":" << linenumber << endl;
 601                                 error = true;
 602                                 return "";
 603                         }
 604                 }
 605         }
 606         // no quotes, and no equals. something freaky.
 607         if ((!number_of_quotes) || (!number_of_equals) && (strlen(buffer)>2) && (buffer[0]=='<'))
 608         {
 609                 *errorstream << "Malformed tag at " << filename << ":" << linenumber << endl;
 610                 error = true;
 611                 return "";
 612         }
 613         // odd number of quotes. thats just wrong.
 614         if ((number_of_quotes % 2) != 0)
 615         {
 616                 *errorstream << "Missing \" at " << filename << ":" << linenumber << endl;
 617                 error = true;
 618                 return "";
 619         }
 620         if (number_of_equals < (number_of_quotes/2))
 621         {
 622                 *errorstream << "Missing '=' at " << filename << ":" << linenumber << endl;
 623         }
 624         if (number_of_equals > (number_of_quotes/2))
 625         {
 626                 *errorstream << "Too many '=' at " << filename << ":" << linenumber << endl;
 627         }
 628
 629         std::string parsedata = buffer;
 630         // turn multispace into single space
 631         while (parsedata.find("\xA0\xA0") != std::string::npos)
 632         {
 633                 parsedata.erase(parsedata.find("\xA0\xA0"),1);
 634         }
 635
 636         // turn our hardspace back into softspace
 637         for (unsigned int d = 0; d < parsedata.length(); d++)
 638         {
 639                 if (parsedata[d] == '\xA0')
 640                         parsedata[d] = ' ';
 641         }
 642
 643         // and we're done, the line is fine!
 644         return parsedata;
 645 }
 646
 647 int ServerConfig::fgets_safe(char* buffer, size_t maxsize, FILE* &file)
 648 {
 649         char c_read = '\0';
 650         unsigned int bufptr = 0;
 651         while ((!feof(file)) && (c_read != '\n') && (c_read != '\r') && (bufptr < maxsize))
 652         {
 653                 c_read = fgetc(file);
 654                 if ((c_read != '\n') && (c_read != '\r'))
 655                         buffer[bufptr++] = c_read;
 656         }
 657         buffer[bufptr] = '\0';
 658         return bufptr;
 659 }
 660
 661 bool ServerConfig::LoadConf(const char* filename, std::stringstream *target, std::stringstream* errorstream)
 662 {
 663         target->str("");
 664         errorstream->str("");
 665         long linenumber = 1;
 666         // first, check that the file exists before we try to do anything with it
 667         if (!FileExists(filename))
 668         {
 669                 *errorstream << "File " << filename << " not found." << endl;
 670                 return false;
 671         }
 672         // Fix the chmod of the file to restrict it to the current user and group
 673         chmod(filename,0600);
 674         for (unsigned int t = 0; t < include_stack.size(); t++)
 675         {
 676                 if (std::string(filename) == include_stack[t])
 677                 {
 678                         *errorstream << "File " << filename << " is included recursively (looped inclusion)." << endl;
 679                         return false;
 680                 }
 681         }
 682         include_stack.push_back(filename);
 683         // now open it
 684         FILE* conf = fopen(filename,"r");
 685         char buffer[MAXBUF];
 686         if (conf)
 687         {
 688                 while (!feof(conf))
 689                 {
 690                         if (fgets_safe(buffer, MAXBUF, conf))
 691                         {
 692                                 if ((!feof(conf)) && (buffer) && (strlen(buffer)))
 693                                 {
 694                                         if ((buffer[0] != '#') && (buffer[0] != '\r')  && (buffer[0] != '\n'))
 695                                         {
 696                                                 if (!strncmp(buffer,"<include file=\"",15))
 697                                                 {
 698                                                         char* buf = buffer;
 699                                                         char confpath[10240],newconf[10240];
 700                                                         // include file directive
 701                                                         buf += 15;      // advance to filename
 702                                                         for (unsigned int j = 0; j < strlen(buf); j++)
 703                                                         {
 704                                                                 if (buf[j] == '\\')
 705                                                                         buf[j] = '/';
 706                                                                 if (buf[j] == '"')
 707                                                                 {
 708                                                                         buf[j] = '\0';
 709                                                                         break;
 710                                                                 }
 711                                                         }
 712                                                         log(DEFAULT,"Opening included file '%s'",buf);
 713                                                         if (*buf != '/')
 714                                                         {
 715                                                                 strlcpy(confpath,CONFIG_FILE,10240);
 716                                                                 if (strstr(confpath,"/inspircd.conf"))
 717                                                                 {
 718                                                                         // leaves us with just the path
 719                                                                         *(strstr(confpath,"/inspircd.conf")) = '\0';
 720                                                                 }
 721                                                                 snprintf(newconf,10240,"%s/%s",confpath,buf);
 722                                                         }
 723                                                         else strlcpy(newconf,buf,10240);
 724                                                         std::stringstream merge(stringstream::in | stringstream::out);
 725                                                         // recursively call LoadConf and get the new data, use the same errorstream
 726                                                         if (LoadConf(newconf, &merge, errorstream))
 727                                                         {
 728                                                                 // append to the end of the file
 729                                                                 std::string newstuff = merge.str();
 730                                                                 *target << newstuff;
 731                                                         }
 732                                                         else
 733                                                         {
 734                                                                 // the error propogates up to its parent recursively
 735                                                                 // causing the config reader to bail at the top level.
 736                                                                 fclose(conf);
 737                                                                 return false;
 738                                                         }
 739                                                 }
 740                                                 else
 741                                                 {
 742                                                         bool error = false;
 743                                                         std::string data = this->ConfProcess(buffer,linenumber++,errorstream,error,filename);
 744                                                         if (error)
 745                                                         {
 746                                                                 return false;
 747                                                         }
 748                                                         *target << data;
 749                                                 }
 750                                         }
 751                                         else linenumber++;
 752                                 }
 753                         }
 754                 }
 755                 fclose(conf);
 756         }
 757         target->seekg(0);
 758         return true;
 759 }
 760
 761 /* Counts the number of tags of a certain type within the config file, e.g. to enumerate opers */
 762
 763 int ServerConfig::EnumConf(std::stringstream *config, const char* tag)
 764 {
 765         int ptr = 0;
 766         char buffer[MAXBUF], c_tag[MAXBUF], c, lastc;
 767         int in_token, in_quotes, tptr, idx = 0;
 768
 769         const char* buf = config->str().c_str();
 770         long bptr = 0;
 771         long len = strlen(buf);
 772
 773         ptr = 0;
 774         in_token = 0;
 775         in_quotes = 0;
 776         lastc = '\0';
 777         while (bptr<len)
 778         {
 779                 lastc = c;
 780                 c = buf[bptr++];
 781                 if ((c == '#') && (lastc == '\n'))
 782                 {
 783                         while ((c != '\n') && (bptr<len))
 784                         {
 785                                 lastc = c;
 786                                 c = buf[bptr++];
 787                         }
 788                 }
 789                 if ((c == '<') && (!in_quotes))
 790                 {
 791                         tptr = 0;
 792                         in_token = 1;
 793                         do {
 794                                 c = buf[bptr++];
 795                                 if (c != ' ')
 796                                 {
 797                                         c_tag[tptr++] = c;
 798                                         c_tag[tptr] = '\0';
 799                                 }
 800                         } while (c != ' ');
 801                 }
 802                 if (c == '"')
 803                 {
 804                         in_quotes = (!in_quotes);
 805                 }
 806                 if ((c == '>') && (!in_quotes))
 807                 {
 808                         in_token = 0;
 809                         if (!strcmp(c_tag,tag))
 810                         {
 811                                 /* correct tag, but wrong index */
 812                                 idx++;
 813                         }
 814                         c_tag[0] = '\0';
 815                         buffer[0] = '\0';
 816                         ptr = 0;
 817                         tptr = 0;
 818                 }
 819                 if (c != '>')
 820                 {
 821                         if ((in_token) && (c != '\n') && (c != '\r'))
 822                         {
 823                                 buffer[ptr++] = c;
 824                                 buffer[ptr] = '\0';
 825                         }
 826                 }
 827         }
 828         return idx;
 829 }
 830
 831 /* Counts the number of values within a certain tag */
 832
 833 int ServerConfig::EnumValues(std::stringstream *config, const char* tag, int index)
 834 {
 835         int ptr = 0;
 836         char buffer[MAXBUF], c_tag[MAXBUF], c, lastc;
 837         int in_token, in_quotes, tptr, idx = 0;
 838
 839         bool correct_tag = false;
 840         int num_items = 0;
 841
 842         const char* buf = config->str().c_str();
 843         long bptr = 0;
 844         long len = strlen(buf);
 845
 846         ptr = 0;
 847         in_token = 0;
 848         in_quotes = 0;
 849         lastc = '\0';
 850         while (bptr<len)
 851         {
 852                 lastc = c;
 853                 c = buf[bptr++];
 854                 if ((c == '#') && (lastc == '\n'))
 855                 {
 856                         while ((c != '\n') && (bptr<len))
 857                         {
 858                                 lastc = c;
 859                                 c = buf[bptr++];
 860                         }
 861                 }
 862                 if ((c == '<') && (!in_quotes))
 863                 {
 864                         tptr = 0;
 865                         in_token = 1;
 866                         do {
 867                                 c = buf[bptr++];
 868                                 if (c != ' ')
 869                                 {
 870                                         c_tag[tptr++] = c;
 871                                         c_tag[tptr] = '\0';
 872
 873                                         if ((!strcmp(c_tag,tag)) && (idx == index))
 874                                         {
 875                                                 correct_tag = true;
 876                                         }
 877                                 }
 878                         } while (c != ' ');
 879                 }
 880                 if (c == '"')
 881                 {
 882                         in_quotes = (!in_quotes);
 883                 }
 884
 885                 if ( (correct_tag) && (!in_quotes) && ( (c == ' ') || (c == '\n') || (c == '\r') ) )
 886                 {
 887                         num_items++;
 888                 }
 889                 if ((c == '>') && (!in_quotes))
 890                 {
 891                         in_token = 0;
 892                         if (correct_tag)
 893                                 correct_tag = false;
 894                         if (!strcmp(c_tag,tag))
 895                         {
 896                                 /* correct tag, but wrong index */
 897                                 idx++;
 898                         }
 899                         c_tag[0] = '\0';
 900                         buffer[0] = '\0';
 901                         ptr = 0;
 902                         tptr = 0;
 903                 }
 904                 if (c != '>')
 905                 {
 906                         if ((in_token) && (c != '\n') && (c != '\r'))
 907                         {
 908                                 buffer[ptr++] = c;
 909                                 buffer[ptr] = '\0';
 910                         }
 911                 }
 912         }
 913         return num_items+1;
 914 }
 915
 916
 917
 918 int ServerConfig::ConfValueEnum(char* tag, std::stringstream* config)
 919 {
 920         return EnumConf(config,tag);
 921 }
 922
 923
 924
 925 /* Retrieves a value from the config file. If there is more than one value of the specified
 926  * key and section (e.g. for opers etc) then the index value specifies which to retreive, e.g.
 927  *
 928  * ConfValue("oper","name",2,result);
 929  */
 930
 931 int ServerConfig::ReadConf(std::stringstream *config, const char* tag, const char* var, int index, char *result)
 932 {
 933         int ptr = 0;
 934         char buffer[65535], c_tag[MAXBUF], c, lastc;
 935         int in_token, in_quotes, tptr, idx = 0;
 936         char* key;
 937
 938         const char* buf = config->str().c_str();
 939         long bptr = 0;
 940         long len = config->str().length();
 941
 942         ptr = 0;
 943         in_token = 0;
 944         in_quotes = 0;
 945         lastc = '\0';
 946         c_tag[0] = '\0';
 947         buffer[0] = '\0';
 948         while (bptr<len)
 949         {
 950                 lastc = c;
 951                 c = buf[bptr++];
 952                 // FIX: Treat tabs as spaces
 953                 if (c == 9)
 954                         c = 32;
 955                 if ((c == '<') && (!in_quotes))
 956                 {
 957                         tptr = 0;
 958                         in_token = 1;
 959                         do {
 960                                 c = buf[bptr++];
 961                                 if (c != ' ')
 962                                 {
 963                                         c_tag[tptr++] = c;
 964                                         c_tag[tptr] = '\0';
 965                                 }
 966                         // FIX: Tab can follow a tagname as well as space.
 967                         } while ((c != ' ') && (c != 9));
 968                 }
 969                 if (c == '"')
 970                 {
 971                         in_quotes = (!in_quotes);
 972                 }
 973                 if ((c == '>') && (!in_quotes))
 974                 {
 975                         in_token = 0;
 976                         if (idx == index)
 977                         {
 978                                 if (!strcmp(c_tag,tag))
 979                                 {
 980                                         if ((buffer) && (c_tag) && (var))
 981                                         {
 982                                                 key = strstr(buffer,var);
 983                                                 if (!key)
 984                                                 {
 985                                                         /* value not found in tag */
 986                                                         *result = 0;
 987                                                         return 0;
 988                                                 }
 989                                                 else
 990                                                 {
 991                                                         key+=strlen(var);
 992                                                         while (*key !='"')
 993                                                         {
 994                                                                 if (!*key)
 995                                                                 {
 996                                                                         /* missing quote */
 997                                                                         *result = 0;
 998                                                                         return 0;
 999                                                                 }
1000                                                                 key++;
1001                                                         }
1002                                                         key++;
1003                                                         for (unsigned j = 0; j < strlen(key); j++)
1004                                                         {
1005                                                                 if (key[j] == '"')
1006                                                                 {
1007                                                                         key[j] = '\0';
1008                                                                 }
1009                                                         }
1010                                                         strlcpy(result,key,MAXBUF);
1011                                                         return 1;
1012                                                 }
1013                                         }
1014                                 }
1015                         }
1016                         if (!strcmp(c_tag,tag))
1017                         {
1018                                 /* correct tag, but wrong index */
1019                                 idx++;
1020                         }
1021                         c_tag[0] = '\0';
1022                         buffer[0] = '\0';
1023                         ptr = 0;
1024                         tptr = 0;
1025                 }
1026                 if (c != '>')
1027                 {
1028                         if ((in_token) && (c != '\n') && (c != '\r'))
1029                         {
1030                                 buffer[ptr++] = c;
1031                                 buffer[ptr] = '\0';
1032                         }
1033                 }
1034         }
1035         *result = 0; // value or its tag not found at all
1036         return 0;
1037 }
1038
1039
1040
1041 int ServerConfig::ConfValue(char* tag, char* var, int index, char *result,std::stringstream *config)
1042 {
1043         ReadConf(config, tag, var, index, result);
1044         return 0;
1045 }
1046
1047
1048
1049 // This will bind a socket to a port. It works for UDP/TCP
1050 int BindSocket (int sockfd, struct sockaddr_in client, struct sockaddr_in server, int port, char* addr)
1051 {
1052         memset((char *)&server,0,sizeof(server));
1053         struct in_addr addy;
1054         inet_aton(addr,&addy);
1055         server.sin_family = AF_INET;
1056         if (!strcmp(addr,""))
1057         {
1058                 server.sin_addr.s_addr = htonl(INADDR_ANY);
1059         }
1060         else
1061         {
1062                 server.sin_addr = addy;
1063         }
1064         server.sin_port = htons(port);
1065         if (bind(sockfd,(struct sockaddr*)&server,sizeof(server))<0)
1066         {
1067                 return(ERROR);
1068         }
1069         else
1070         {
1071                 listen(sockfd, Config->MaxConn);
1072                 return(TRUE);
1073         }
1074 }
1075
1076
1077 // Open a TCP Socket
1078 int OpenTCPSocket (void)
1079 {
1080         int sockfd;
1081         int on = 1;
1082         struct linger linger = { 0 };
1083
1084         if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
1085                 return (ERROR);
1086         else
1087         {
1088                 setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char*)&on, sizeof(on));
1089                 /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
1090                 linger.l_onoff = 1;
1091                 linger.l_linger = 1;
1092                 setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (const char*)&linger,sizeof(linger));
1093                 return (sockfd);
1094         }
1095 }
1096
1097 int BindPorts()
1098 {
1099         char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
1100         sockaddr_in client,server;
1101         int clientportcount = 0;
1102         int BoundPortCount = 0;
1103         for (int count = 0; count < Config->ConfValueEnum("bind",&Config->config_f); count++)
1104         {
1105                 Config->ConfValue("bind","port",count,configToken,&Config->config_f);
1106                 Config->ConfValue("bind","address",count,Addr,&Config->config_f);
1107                 Config->ConfValue("bind","type",count,Type,&Config->config_f);
1108                 if (strcmp(Type,"servers"))
1109                 {
1110                         // modules handle server bind types now,
1111                         // its not a typo in the strcmp.
1112                         Config->ports[clientportcount] = atoi(configToken);
1113                         strlcpy(Config->addrs[clientportcount],Addr,256);
1114                         clientportcount++;
1115                         log(DEBUG,"InspIRCd: startup: read binding %s:%s [%s] from config",Addr,configToken, Type);
1116                 }
1117         }
1118         int PortCount = clientportcount;
1119
1120         for (int count = 0; count < PortCount; count++)
1121         {
1122                 if ((openSockfd[BoundPortCount] = OpenTCPSocket()) == ERROR)
1123                 {
1124                         log(DEBUG,"InspIRCd: startup: bad fd %lu",(unsigned long)openSockfd[BoundPortCount]);
1125                         return(ERROR);
1126                 }
1127                 if (BindSocket(openSockfd[BoundPortCount],client,server,Config->ports[count],Config->addrs[count]) == ERROR)
1128                 {
1129                         log(DEFAULT,"InspIRCd: startup: failed to bind port %lu",(unsigned long)Config->ports[count]);
1130                 }
1131                 else    /* well we at least bound to one socket so we'll continue */
1132                 {
1133                         BoundPortCount++;
1134                 }
1135         }
1136
1137         /* if we didn't bind to anything then abort */
1138         if (!BoundPortCount)
1139         {
1140                 log(DEFAULT,"InspIRCd: startup: no ports bound, bailing!");
1141                 printf("\nERROR: Was not able to bind any of %lu ports! Please check your configuration.\n\n", (unsigned long)PortCount);
1142                 return (ERROR);
1143         }
1144
1145         return BoundPortCount;
1146 }
1147