src/inspircd_io.cpp

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